From 24f1df60ce943aee107b3cb99b37a0152c9dd47a Mon Sep 17 00:00:00 2001 From: Ilya Dryomov Date: Fri, 12 Jan 2018 17:22:10 +0100 Subject: rbd: set max_segment_size to UINT_MAX Commit 21acdf45f495 ("rbd: set max_segments to USHRT_MAX") removed the limit on max_segments. Remove the limit on max_segment_size as well. Signed-off-by: Ilya Dryomov Reviewed-by: Alex Elder --- drivers/block/rbd.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/block/rbd.c b/drivers/block/rbd.c index 8e40da093766..4ca0a452d88e 100644 --- a/drivers/block/rbd.c +++ b/drivers/block/rbd.c @@ -4378,7 +4378,7 @@ static int rbd_init_disk(struct rbd_device *rbd_dev) blk_queue_max_hw_sectors(q, segment_size / SECTOR_SIZE); q->limits.max_sectors = queue_max_hw_sectors(q); blk_queue_max_segments(q, USHRT_MAX); - blk_queue_max_segment_size(q, segment_size); + blk_queue_max_segment_size(q, UINT_MAX); blk_queue_io_min(q, segment_size); blk_queue_io_opt(q, segment_size); -- cgit v1.2.3-59-g8ed1b From db2196a58939c0b75b9b7ea5ab1fec4081d48661 Mon Sep 17 00:00:00 2001 From: Ilya Dryomov Date: Tue, 16 Jan 2018 12:15:02 +0100 Subject: libceph: eliminate overflows in ceph_calc_file_object_mapping() bl, stripeno and objsetno should be u64 -- otherwise large enough files get corrupted. How large depends on file layout: - 4M-objects layout (default): any file over 16P - 64K-objects layout (smallest possible object size): any file over 512T Only CephFS is affected, rbd doesn't use ceph_calc_file_object_mapping() yet. Fortunately, CephFS has a max_file_size configurable, the default for which is way below both of the above numbers. Reimplement the logic from scratch with no layout validation -- it's done on the MDS side. Signed-off-by: Ilya Dryomov Reviewed-by: Alex Elder --- net/ceph/osdmap.c | 88 ++++++++++++++++++------------------------------------- 1 file changed, 28 insertions(+), 60 deletions(-) diff --git a/net/ceph/osdmap.c b/net/ceph/osdmap.c index 0da27c66349a..3faa9e701518 100644 --- a/net/ceph/osdmap.c +++ b/net/ceph/osdmap.c @@ -2141,72 +2141,40 @@ bool ceph_osds_changed(const struct ceph_osds *old_acting, } /* - * calculate file layout from given offset, length. - * fill in correct oid, logical length, and object extent - * offset, length. + * Map a file extent to a stripe unit within an object. + * Fill in objno, offset into object, and object extent length (i.e. the + * number of bytes mapped, less than or equal to @l->stripe_unit). * - * for now, we write only a single su, until we can - * pass a stride back to the caller. + * Example for stripe_count = 3, stripes_per_object = 4: + * + * blockno | 0 3 6 9 | 1 4 7 10 | 2 5 8 11 | 12 15 18 21 | 13 16 19 + * stripeno | 0 1 2 3 | 0 1 2 3 | 0 1 2 3 | 4 5 6 7 | 4 5 6 + * stripepos | 0 | 1 | 2 | 0 | 1 + * objno | 0 | 1 | 2 | 3 | 4 + * objsetno | 0 | 1 */ -int ceph_calc_file_object_mapping(struct ceph_file_layout *layout, +int ceph_calc_file_object_mapping(struct ceph_file_layout *l, u64 off, u64 len, - u64 *ono, - u64 *oxoff, u64 *oxlen) -{ - u32 osize = layout->object_size; - u32 su = layout->stripe_unit; - u32 sc = layout->stripe_count; - u32 bl, stripeno, stripepos, objsetno; - u32 su_per_object; - u64 t, su_offset; - - dout("mapping %llu~%llu osize %u fl_su %u\n", off, len, - osize, su); - if (su == 0 || sc == 0) - goto invalid; - su_per_object = osize / su; - if (su_per_object == 0) - goto invalid; - dout("osize %u / su %u = su_per_object %u\n", osize, su, - su_per_object); - - if ((su & ~PAGE_MASK) != 0) - goto invalid; - - /* bl = *off / su; */ - t = off; - do_div(t, su); - bl = t; - dout("off %llu / su %u = bl %u\n", off, su, bl); - - stripeno = bl / sc; - stripepos = bl % sc; - objsetno = stripeno / su_per_object; - - *ono = objsetno * sc + stripepos; - dout("objset %u * sc %u = ono %u\n", objsetno, sc, (unsigned int)*ono); - - /* *oxoff = *off % layout->fl_stripe_unit; # offset in su */ - t = off; - su_offset = do_div(t, su); - *oxoff = su_offset + (stripeno % su_per_object) * su; + u64 *objno, u64 *objoff, u64 *xlen) +{ + u32 stripes_per_object = l->object_size / l->stripe_unit; + u64 blockno; /* which su in the file (i.e. globally) */ + u32 blockoff; /* offset into su */ + u64 stripeno; /* which stripe */ + u32 stripepos; /* which su in the stripe, + which object in the object set */ + u64 objsetno; /* which object set */ + u32 objsetpos; /* which stripe in the object set */ - /* - * Calculate the length of the extent being written to the selected - * object. This is the minimum of the full length requested (len) or - * the remainder of the current stripe being written to. - */ - *oxlen = min_t(u64, len, su - su_offset); + blockno = div_u64_rem(off, l->stripe_unit, &blockoff); + stripeno = div_u64_rem(blockno, l->stripe_count, &stripepos); + objsetno = div_u64_rem(stripeno, stripes_per_object, &objsetpos); - dout(" obj extent %llu~%llu\n", *oxoff, *oxlen); - return 0; + *objno = objsetno * l->stripe_count + stripepos; + *objoff = objsetpos * l->stripe_unit + blockoff; + *xlen = min_t(u64, len, l->stripe_unit - blockoff); -invalid: - dout(" invalid layout\n"); - *ono = 0; - *oxoff = 0; - *oxlen = 0; - return -EINVAL; + return 0; } EXPORT_SYMBOL(ceph_calc_file_object_mapping); -- cgit v1.2.3-59-g8ed1b From dccbf08005df800f5c8e948ab6132ed5536134bc Mon Sep 17 00:00:00 2001 From: Ilya Dryomov Date: Sat, 17 Feb 2018 09:29:58 +0100 Subject: libceph, ceph: change ceph_calc_file_object_mapping() signature - make it void - xlen (object extent length) out parameter should be u32 because only a single stripe unit is mapped at a time Signed-off-by: Ilya Dryomov Reviewed-by: Alex Elder --- fs/ceph/addr.c | 16 ++++++---------- fs/ceph/ioctl.c | 11 +++-------- include/linux/ceph/osdmap.h | 7 +++---- net/ceph/osd_client.c | 10 ++++------ net/ceph/osdmap.c | 6 ++---- 5 files changed, 18 insertions(+), 32 deletions(-) diff --git a/fs/ceph/addr.c b/fs/ceph/addr.c index b4336b42ce3b..c0fe1b6f47ac 100644 --- a/fs/ceph/addr.c +++ b/fs/ceph/addr.c @@ -945,19 +945,15 @@ get_more_pages: if (locked_pages == 0) { u64 objnum; u64 objoff; + u32 xlen; /* prepare async write request */ offset = (u64)page_offset(page); - len = wsize; - - rc = ceph_calc_file_object_mapping(&ci->i_layout, - offset, len, - &objnum, &objoff, - &len); - if (rc < 0) { - unlock_page(page); - break; - } + ceph_calc_file_object_mapping(&ci->i_layout, + offset, wsize, + &objnum, &objoff, + &xlen); + len = xlen; num_ops = 1; strip_unit_end = page->index + diff --git a/fs/ceph/ioctl.c b/fs/ceph/ioctl.c index 851aa69ec8f0..b855d24a895a 100644 --- a/fs/ceph/ioctl.c +++ b/fs/ceph/ioctl.c @@ -185,7 +185,7 @@ static long ceph_ioctl_get_dataloc(struct file *file, void __user *arg) &ceph_sb_to_client(inode->i_sb)->client->osdc; struct ceph_object_locator oloc; CEPH_DEFINE_OID_ONSTACK(oid); - u64 len = 1, olen; + u32 xlen; u64 tmp; struct ceph_pg pgid; int r; @@ -195,13 +195,8 @@ static long ceph_ioctl_get_dataloc(struct file *file, void __user *arg) return -EFAULT; down_read(&osdc->lock); - r = ceph_calc_file_object_mapping(&ci->i_layout, dl.file_offset, len, - &dl.object_no, &dl.object_offset, - &olen); - if (r < 0) { - up_read(&osdc->lock); - return -EIO; - } + ceph_calc_file_object_mapping(&ci->i_layout, dl.file_offset, 1, + &dl.object_no, &dl.object_offset, &xlen); dl.file_offset -= dl.object_offset; dl.object_size = ci->i_layout.object_size; dl.block_size = ci->i_layout.stripe_unit; diff --git a/include/linux/ceph/osdmap.h b/include/linux/ceph/osdmap.h index d41fad99c0fa..92314035dac1 100644 --- a/include/linux/ceph/osdmap.h +++ b/include/linux/ceph/osdmap.h @@ -280,10 +280,9 @@ bool ceph_osds_changed(const struct ceph_osds *old_acting, const struct ceph_osds *new_acting, bool any_change); -/* calculate mapping of a file extent to an object */ -extern int ceph_calc_file_object_mapping(struct ceph_file_layout *layout, - u64 off, u64 len, - u64 *bno, u64 *oxoff, u64 *oxlen); +void ceph_calc_file_object_mapping(struct ceph_file_layout *l, + u64 off, u64 len, + u64 *objno, u64 *objoff, u32 *xlen); int __ceph_object_locator_to_pg(struct ceph_pg_pool_info *pi, const struct ceph_object_id *oid, diff --git a/net/ceph/osd_client.c b/net/ceph/osd_client.c index 2814dba5902d..4b0485458d26 100644 --- a/net/ceph/osd_client.c +++ b/net/ceph/osd_client.c @@ -103,13 +103,12 @@ static int calc_layout(struct ceph_file_layout *layout, u64 off, u64 *plen, u64 *objnum, u64 *objoff, u64 *objlen) { u64 orig_len = *plen; - int r; + u32 xlen; /* object extent? */ - r = ceph_calc_file_object_mapping(layout, off, orig_len, objnum, - objoff, objlen); - if (r < 0) - return r; + ceph_calc_file_object_mapping(layout, off, orig_len, objnum, + objoff, &xlen); + *objlen = xlen; if (*objlen < orig_len) { *plen = *objlen; dout(" skipping last %llu, final file extent %llu~%llu\n", @@ -117,7 +116,6 @@ static int calc_layout(struct ceph_file_layout *layout, u64 off, u64 *plen, } dout("calc_layout objnum=%llx %llu~%llu\n", *objnum, *objoff, *objlen); - return 0; } diff --git a/net/ceph/osdmap.c b/net/ceph/osdmap.c index 3faa9e701518..e3ebbe2ecdad 100644 --- a/net/ceph/osdmap.c +++ b/net/ceph/osdmap.c @@ -2153,9 +2153,9 @@ bool ceph_osds_changed(const struct ceph_osds *old_acting, * objno | 0 | 1 | 2 | 3 | 4 * objsetno | 0 | 1 */ -int ceph_calc_file_object_mapping(struct ceph_file_layout *l, +void ceph_calc_file_object_mapping(struct ceph_file_layout *l, u64 off, u64 len, - u64 *objno, u64 *objoff, u64 *xlen) + u64 *objno, u64 *objoff, u32 *xlen) { u32 stripes_per_object = l->object_size / l->stripe_unit; u64 blockno; /* which su in the file (i.e. globally) */ @@ -2173,8 +2173,6 @@ int ceph_calc_file_object_mapping(struct ceph_file_layout *l, *objno = objsetno * l->stripe_count + stripepos; *objoff = objsetpos * l->stripe_unit + blockoff; *xlen = min_t(u64, len, l->stripe_unit - blockoff); - - return 0; } EXPORT_SYMBOL(ceph_calc_file_object_mapping); -- cgit v1.2.3-59-g8ed1b From a1fbb5e7bbb56fccdf54bf4ab5086c6080ee5bfa Mon Sep 17 00:00:00 2001 From: Ilya Dryomov Date: Tue, 16 Jan 2018 12:15:02 +0100 Subject: rbd: start enums at 1 instead of 0 Signed-off-by: Ilya Dryomov --- drivers/block/rbd.c | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) diff --git a/drivers/block/rbd.c b/drivers/block/rbd.c index 4ca0a452d88e..883f17d6deeb 100644 --- a/drivers/block/rbd.c +++ b/drivers/block/rbd.c @@ -217,12 +217,14 @@ struct rbd_obj_request; typedef void (*rbd_obj_callback_t)(struct rbd_obj_request *); enum obj_request_type { - OBJ_REQUEST_NODATA, OBJ_REQUEST_BIO, OBJ_REQUEST_PAGES + OBJ_REQUEST_NODATA = 1, + OBJ_REQUEST_BIO, + OBJ_REQUEST_PAGES, }; enum obj_operation_type { + OBJ_OP_READ = 1, OBJ_OP_WRITE, - OBJ_OP_READ, OBJ_OP_DISCARD, }; -- cgit v1.2.3-59-g8ed1b From 5359a17d2706b86da2af83027343d5eb256f7670 Mon Sep 17 00:00:00 2001 From: Ilya Dryomov Date: Sat, 20 Jan 2018 10:30:10 +0100 Subject: libceph, rbd: new bio handling code (aka don't clone bios) The reason we clone bios is to be able to give each object request (and consequently each ceph_osd_data/ceph_msg_data item) its own pointer to a (list of) bio(s). The messenger then initializes its cursor with cloned bio's ->bi_iter, so it knows where to start reading from/writing to. That's all the cloned bios are used for: to determine each object request's starting position in the provided data buffer. Introduce ceph_bio_iter to do exactly that -- store position within bio list (i.e. pointer to bio) + position within that bio (i.e. bvec_iter). Signed-off-by: Ilya Dryomov --- drivers/block/rbd.c | 67 +++++++++++++++----------- include/linux/ceph/messenger.h | 59 +++++++++++++++++++---- include/linux/ceph/osd_client.h | 11 +++-- net/ceph/messenger.c | 101 ++++++++++++++-------------------------- net/ceph/osd_client.c | 13 ++++-- 5 files changed, 139 insertions(+), 112 deletions(-) diff --git a/drivers/block/rbd.c b/drivers/block/rbd.c index 883f17d6deeb..8eaebf609611 100644 --- a/drivers/block/rbd.c +++ b/drivers/block/rbd.c @@ -218,7 +218,7 @@ typedef void (*rbd_obj_callback_t)(struct rbd_obj_request *); enum obj_request_type { OBJ_REQUEST_NODATA = 1, - OBJ_REQUEST_BIO, + OBJ_REQUEST_BIO, /* pointer into provided bio (list) */ OBJ_REQUEST_PAGES, }; @@ -270,7 +270,7 @@ struct rbd_obj_request { enum obj_request_type type; union { - struct bio *bio_list; + struct ceph_bio_iter bio_pos; struct { struct page **pages; u32 page_count; @@ -1255,6 +1255,27 @@ static u64 rbd_segment_length(struct rbd_device *rbd_dev, return length; } +static void zero_bvec(struct bio_vec *bv) +{ + void *buf; + unsigned long flags; + + buf = bvec_kmap_irq(bv, &flags); + memset(buf, 0, bv->bv_len); + flush_dcache_page(bv->bv_page); + bvec_kunmap_irq(buf, &flags); +} + +static void zero_bios(struct ceph_bio_iter *bio_pos, u32 off, u32 bytes) +{ + struct ceph_bio_iter it = *bio_pos; + + ceph_bio_iter_advance(&it, off); + ceph_bio_iter_advance_step(&it, bytes, ({ + zero_bvec(&bv); + })); +} + /* * bio helpers */ @@ -1719,13 +1740,14 @@ rbd_img_obj_request_read_callback(struct rbd_obj_request *obj_request) rbd_assert(obj_request->type != OBJ_REQUEST_NODATA); if (obj_request->result == -ENOENT) { if (obj_request->type == OBJ_REQUEST_BIO) - zero_bio_chain(obj_request->bio_list, 0); + zero_bios(&obj_request->bio_pos, 0, length); else zero_pages(obj_request->pages, 0, length); obj_request->result = 0; } else if (xferred < length && !obj_request->result) { if (obj_request->type == OBJ_REQUEST_BIO) - zero_bio_chain(obj_request->bio_list, xferred); + zero_bios(&obj_request->bio_pos, xferred, + length - xferred); else zero_pages(obj_request->pages, xferred, length); } @@ -2036,11 +2058,8 @@ static void rbd_obj_request_destroy(struct kref *kref) rbd_assert(obj_request_type_valid(obj_request->type)); switch (obj_request->type) { case OBJ_REQUEST_NODATA: - break; /* Nothing to do */ case OBJ_REQUEST_BIO: - if (obj_request->bio_list) - bio_chain_put(obj_request->bio_list); - break; + break; /* Nothing to do */ case OBJ_REQUEST_PAGES: /* img_data requests don't own their page array */ if (obj_request->pages && @@ -2368,7 +2387,7 @@ static void rbd_img_obj_request_fill(struct rbd_obj_request *obj_request, if (obj_request->type == OBJ_REQUEST_BIO) osd_req_op_extent_osd_data_bio(osd_request, num_ops, - obj_request->bio_list, length); + &obj_request->bio_pos, length); else if (obj_request->type == OBJ_REQUEST_PAGES) osd_req_op_extent_osd_data_pages(osd_request, num_ops, obj_request->pages, length, @@ -2396,8 +2415,7 @@ static int rbd_img_request_fill(struct rbd_img_request *img_request, struct rbd_device *rbd_dev = img_request->rbd_dev; struct rbd_obj_request *obj_request = NULL; struct rbd_obj_request *next_obj_request; - struct bio *bio_list = NULL; - unsigned int bio_offset = 0; + struct ceph_bio_iter bio_it; struct page **pages = NULL; enum obj_operation_type op_type; u64 img_offset; @@ -2412,9 +2430,9 @@ static int rbd_img_request_fill(struct rbd_img_request *img_request, op_type = rbd_img_request_op_type(img_request); if (type == OBJ_REQUEST_BIO) { - bio_list = data_desc; + bio_it = *(struct ceph_bio_iter *)data_desc; rbd_assert(img_offset == - bio_list->bi_iter.bi_sector << SECTOR_SHIFT); + bio_it.iter.bi_sector << SECTOR_SHIFT); } else if (type == OBJ_REQUEST_PAGES) { pages = data_desc; } @@ -2440,17 +2458,8 @@ static int rbd_img_request_fill(struct rbd_img_request *img_request, rbd_img_obj_request_add(img_request, obj_request); if (type == OBJ_REQUEST_BIO) { - unsigned int clone_size; - - rbd_assert(length <= (u64)UINT_MAX); - clone_size = (unsigned int)length; - obj_request->bio_list = - bio_chain_clone_range(&bio_list, - &bio_offset, - clone_size, - GFP_NOIO); - if (!obj_request->bio_list) - goto out_unwind; + obj_request->bio_pos = bio_it; + ceph_bio_iter_advance(&bio_it, length); } else if (type == OBJ_REQUEST_PAGES) { unsigned int page_count; @@ -2980,7 +2989,7 @@ static void rbd_img_parent_read(struct rbd_obj_request *obj_request) if (obj_request->type == OBJ_REQUEST_BIO) result = rbd_img_request_fill(img_request, OBJ_REQUEST_BIO, - obj_request->bio_list); + &obj_request->bio_pos); else result = rbd_img_request_fill(img_request, OBJ_REQUEST_PAGES, obj_request->pages); @@ -4093,9 +4102,13 @@ static void rbd_queue_workfn(struct work_struct *work) if (op_type == OBJ_OP_DISCARD) result = rbd_img_request_fill(img_request, OBJ_REQUEST_NODATA, NULL); - else + else { + struct ceph_bio_iter bio_it = { .bio = rq->bio, + .iter = rq->bio->bi_iter }; + result = rbd_img_request_fill(img_request, OBJ_REQUEST_BIO, - rq->bio); + &bio_it); + } if (result) goto err_img_request; diff --git a/include/linux/ceph/messenger.h b/include/linux/ceph/messenger.h index ead9d85f1c11..d7b9605fd51d 100644 --- a/include/linux/ceph/messenger.h +++ b/include/linux/ceph/messenger.h @@ -93,14 +93,60 @@ static __inline__ bool ceph_msg_data_type_valid(enum ceph_msg_data_type type) } } +#ifdef CONFIG_BLOCK + +struct ceph_bio_iter { + struct bio *bio; + struct bvec_iter iter; +}; + +#define __ceph_bio_iter_advance_step(it, n, STEP) do { \ + unsigned int __n = (n), __cur_n; \ + \ + while (__n) { \ + BUG_ON(!(it)->iter.bi_size); \ + __cur_n = min((it)->iter.bi_size, __n); \ + (void)(STEP); \ + bio_advance_iter((it)->bio, &(it)->iter, __cur_n); \ + if (!(it)->iter.bi_size && (it)->bio->bi_next) { \ + dout("__ceph_bio_iter_advance_step next bio\n"); \ + (it)->bio = (it)->bio->bi_next; \ + (it)->iter = (it)->bio->bi_iter; \ + } \ + __n -= __cur_n; \ + } \ +} while (0) + +/* + * Advance @it by @n bytes. + */ +#define ceph_bio_iter_advance(it, n) \ + __ceph_bio_iter_advance_step(it, n, 0) + +/* + * Advance @it by @n bytes, executing BVEC_STEP for each bio_vec. + */ +#define ceph_bio_iter_advance_step(it, n, BVEC_STEP) \ + __ceph_bio_iter_advance_step(it, n, ({ \ + struct bio_vec bv; \ + struct bvec_iter __cur_iter; \ + \ + __cur_iter = (it)->iter; \ + __cur_iter.bi_size = __cur_n; \ + __bio_for_each_segment(bv, (it)->bio, __cur_iter, __cur_iter) \ + (void)(BVEC_STEP); \ + })) + +#endif /* CONFIG_BLOCK */ + struct ceph_msg_data { struct list_head links; /* ceph_msg->data */ enum ceph_msg_data_type type; union { #ifdef CONFIG_BLOCK struct { - struct bio *bio; - size_t bio_length; + struct ceph_bio_iter bio_pos; + u32 bio_length; }; #endif /* CONFIG_BLOCK */ struct { @@ -122,10 +168,7 @@ struct ceph_msg_data_cursor { bool need_crc; /* crc update needed */ union { #ifdef CONFIG_BLOCK - struct { /* bio */ - struct bio *bio; /* bio from list */ - struct bvec_iter bvec_iter; - }; + struct ceph_bio_iter bio_iter; #endif /* CONFIG_BLOCK */ struct { /* pages */ unsigned int page_offset; /* offset in page */ @@ -290,8 +333,8 @@ extern void ceph_msg_data_add_pages(struct ceph_msg *msg, struct page **pages, extern void ceph_msg_data_add_pagelist(struct ceph_msg *msg, struct ceph_pagelist *pagelist); #ifdef CONFIG_BLOCK -extern void ceph_msg_data_add_bio(struct ceph_msg *msg, struct bio *bio, - size_t length); +void ceph_msg_data_add_bio(struct ceph_msg *msg, struct ceph_bio_iter *bio_pos, + u32 length); #endif /* CONFIG_BLOCK */ extern struct ceph_msg *ceph_msg_new(int type, int front_len, gfp_t flags, diff --git a/include/linux/ceph/osd_client.h b/include/linux/ceph/osd_client.h index 52fb37d1c2a5..315691490cb0 100644 --- a/include/linux/ceph/osd_client.h +++ b/include/linux/ceph/osd_client.h @@ -72,8 +72,8 @@ struct ceph_osd_data { struct ceph_pagelist *pagelist; #ifdef CONFIG_BLOCK struct { - struct bio *bio; /* list of bios */ - size_t bio_length; /* total in list */ + struct ceph_bio_iter bio_pos; + u32 bio_length; }; #endif /* CONFIG_BLOCK */ }; @@ -405,9 +405,10 @@ extern void osd_req_op_extent_osd_data_pagelist(struct ceph_osd_request *, unsigned int which, struct ceph_pagelist *pagelist); #ifdef CONFIG_BLOCK -extern void osd_req_op_extent_osd_data_bio(struct ceph_osd_request *, - unsigned int which, - struct bio *bio, size_t bio_length); +void osd_req_op_extent_osd_data_bio(struct ceph_osd_request *osd_req, + unsigned int which, + struct ceph_bio_iter *bio_pos, + u32 bio_length); #endif /* CONFIG_BLOCK */ extern void osd_req_op_cls_request_data_pagelist(struct ceph_osd_request *, diff --git a/net/ceph/messenger.c b/net/ceph/messenger.c index 8a4d3758030b..b9fa8b869c08 100644 --- a/net/ceph/messenger.c +++ b/net/ceph/messenger.c @@ -839,90 +839,57 @@ static void ceph_msg_data_bio_cursor_init(struct ceph_msg_data_cursor *cursor, size_t length) { struct ceph_msg_data *data = cursor->data; - struct bio *bio; + struct ceph_bio_iter *it = &cursor->bio_iter; - BUG_ON(data->type != CEPH_MSG_DATA_BIO); + cursor->resid = min_t(size_t, length, data->bio_length); + *it = data->bio_pos; + if (cursor->resid < it->iter.bi_size) + it->iter.bi_size = cursor->resid; - bio = data->bio; - BUG_ON(!bio); - - cursor->resid = min(length, data->bio_length); - cursor->bio = bio; - cursor->bvec_iter = bio->bi_iter; - cursor->last_piece = - cursor->resid <= bio_iter_len(bio, cursor->bvec_iter); + BUG_ON(cursor->resid < bio_iter_len(it->bio, it->iter)); + cursor->last_piece = cursor->resid == bio_iter_len(it->bio, it->iter); } static struct page *ceph_msg_data_bio_next(struct ceph_msg_data_cursor *cursor, size_t *page_offset, size_t *length) { - struct ceph_msg_data *data = cursor->data; - struct bio *bio; - struct bio_vec bio_vec; - - BUG_ON(data->type != CEPH_MSG_DATA_BIO); - - bio = cursor->bio; - BUG_ON(!bio); + struct bio_vec bv = bio_iter_iovec(cursor->bio_iter.bio, + cursor->bio_iter.iter); - bio_vec = bio_iter_iovec(bio, cursor->bvec_iter); - - *page_offset = (size_t) bio_vec.bv_offset; - BUG_ON(*page_offset >= PAGE_SIZE); - if (cursor->last_piece) /* pagelist offset is always 0 */ - *length = cursor->resid; - else - *length = (size_t) bio_vec.bv_len; - BUG_ON(*length > cursor->resid); - BUG_ON(*page_offset + *length > PAGE_SIZE); - - return bio_vec.bv_page; + *page_offset = bv.bv_offset; + *length = bv.bv_len; + return bv.bv_page; } static bool ceph_msg_data_bio_advance(struct ceph_msg_data_cursor *cursor, size_t bytes) { - struct bio *bio; - struct bio_vec bio_vec; - - BUG_ON(cursor->data->type != CEPH_MSG_DATA_BIO); - - bio = cursor->bio; - BUG_ON(!bio); - - bio_vec = bio_iter_iovec(bio, cursor->bvec_iter); + struct ceph_bio_iter *it = &cursor->bio_iter; - /* Advance the cursor offset */ - - BUG_ON(cursor->resid < bytes); + BUG_ON(bytes > cursor->resid); + BUG_ON(bytes > bio_iter_len(it->bio, it->iter)); cursor->resid -= bytes; + bio_advance_iter(it->bio, &it->iter, bytes); - bio_advance_iter(bio, &cursor->bvec_iter, bytes); + if (!cursor->resid) { + BUG_ON(!cursor->last_piece); + return false; /* no more data */ + } - if (bytes < bio_vec.bv_len) + if (!bytes || (it->iter.bi_size && it->iter.bi_bvec_done)) return false; /* more bytes to process in this segment */ - /* Move on to the next segment, and possibly the next bio */ - - if (!cursor->bvec_iter.bi_size) { - bio = bio->bi_next; - cursor->bio = bio; - if (bio) - cursor->bvec_iter = bio->bi_iter; - else - memset(&cursor->bvec_iter, 0, - sizeof(cursor->bvec_iter)); - } - - if (!cursor->last_piece) { - BUG_ON(!cursor->resid); - BUG_ON(!bio); - /* A short read is OK, so use <= rather than == */ - if (cursor->resid <= bio_iter_len(bio, cursor->bvec_iter)) - cursor->last_piece = true; + if (!it->iter.bi_size) { + it->bio = it->bio->bi_next; + it->iter = it->bio->bi_iter; + if (cursor->resid < it->iter.bi_size) + it->iter.bi_size = cursor->resid; } + BUG_ON(cursor->last_piece); + BUG_ON(cursor->resid < bio_iter_len(it->bio, it->iter)); + cursor->last_piece = cursor->resid == bio_iter_len(it->bio, it->iter); return true; } #endif /* CONFIG_BLOCK */ @@ -1163,9 +1130,11 @@ static struct page *ceph_msg_data_next(struct ceph_msg_data_cursor *cursor, page = NULL; break; } + BUG_ON(!page); BUG_ON(*page_offset + *length > PAGE_SIZE); BUG_ON(!*length); + BUG_ON(*length > cursor->resid); if (last_piece) *last_piece = cursor->last_piece; @@ -3262,16 +3231,14 @@ void ceph_msg_data_add_pagelist(struct ceph_msg *msg, EXPORT_SYMBOL(ceph_msg_data_add_pagelist); #ifdef CONFIG_BLOCK -void ceph_msg_data_add_bio(struct ceph_msg *msg, struct bio *bio, - size_t length) +void ceph_msg_data_add_bio(struct ceph_msg *msg, struct ceph_bio_iter *bio_pos, + u32 length) { struct ceph_msg_data *data; - BUG_ON(!bio); - data = ceph_msg_data_create(CEPH_MSG_DATA_BIO); BUG_ON(!data); - data->bio = bio; + data->bio_pos = *bio_pos; data->bio_length = length; list_add_tail(&data->links, &msg->data); diff --git a/net/ceph/osd_client.c b/net/ceph/osd_client.c index 4b0485458d26..339d8773ebe8 100644 --- a/net/ceph/osd_client.c +++ b/net/ceph/osd_client.c @@ -146,10 +146,11 @@ static void ceph_osd_data_pagelist_init(struct ceph_osd_data *osd_data, #ifdef CONFIG_BLOCK static void ceph_osd_data_bio_init(struct ceph_osd_data *osd_data, - struct bio *bio, size_t bio_length) + struct ceph_bio_iter *bio_pos, + u32 bio_length) { osd_data->type = CEPH_OSD_DATA_TYPE_BIO; - osd_data->bio = bio; + osd_data->bio_pos = *bio_pos; osd_data->bio_length = bio_length; } #endif /* CONFIG_BLOCK */ @@ -216,12 +217,14 @@ EXPORT_SYMBOL(osd_req_op_extent_osd_data_pagelist); #ifdef CONFIG_BLOCK void osd_req_op_extent_osd_data_bio(struct ceph_osd_request *osd_req, - unsigned int which, struct bio *bio, size_t bio_length) + unsigned int which, + struct ceph_bio_iter *bio_pos, + u32 bio_length) { struct ceph_osd_data *osd_data; osd_data = osd_req_op_data(osd_req, which, extent, osd_data); - ceph_osd_data_bio_init(osd_data, bio, bio_length); + ceph_osd_data_bio_init(osd_data, bio_pos, bio_length); } EXPORT_SYMBOL(osd_req_op_extent_osd_data_bio); #endif /* CONFIG_BLOCK */ @@ -826,7 +829,7 @@ static void ceph_osdc_msg_data_add(struct ceph_msg *msg, ceph_msg_data_add_pagelist(msg, osd_data->pagelist); #ifdef CONFIG_BLOCK } else if (osd_data->type == CEPH_OSD_DATA_TYPE_BIO) { - ceph_msg_data_add_bio(msg, osd_data->bio, length); + ceph_msg_data_add_bio(msg, &osd_data->bio_pos, length); #endif } else { BUG_ON(osd_data->type != CEPH_OSD_DATA_TYPE_NONE); -- cgit v1.2.3-59-g8ed1b From df6ba7015dd3a64a2e74353d1e7d19871af86f38 Mon Sep 17 00:00:00 2001 From: Ilya Dryomov Date: Sat, 20 Jan 2018 10:30:10 +0100 Subject: rbd: remove bio cloning helpers Signed-off-by: Ilya Dryomov Reviewed-by: Alex Elder --- drivers/block/rbd.c | 141 ---------------------------------------------------- 1 file changed, 141 deletions(-) diff --git a/drivers/block/rbd.c b/drivers/block/rbd.c index 8eaebf609611..8b9047369ab9 100644 --- a/drivers/block/rbd.c +++ b/drivers/block/rbd.c @@ -444,8 +444,6 @@ static DEFINE_SPINLOCK(rbd_client_list_lock); static struct kmem_cache *rbd_img_request_cache; static struct kmem_cache *rbd_obj_request_cache; -static struct bio_set *rbd_bio_clone; - static int rbd_major; static DEFINE_IDA(rbd_dev_id_ida); @@ -1276,49 +1274,6 @@ static void zero_bios(struct ceph_bio_iter *bio_pos, u32 off, u32 bytes) })); } -/* - * bio helpers - */ - -static void bio_chain_put(struct bio *chain) -{ - struct bio *tmp; - - while (chain) { - tmp = chain; - chain = chain->bi_next; - bio_put(tmp); - } -} - -/* - * zeros a bio chain, starting at specific offset - */ -static void zero_bio_chain(struct bio *chain, int start_ofs) -{ - struct bio_vec bv; - struct bvec_iter iter; - unsigned long flags; - void *buf; - int pos = 0; - - while (chain) { - bio_for_each_segment(bv, chain, iter) { - if (pos + bv.bv_len > start_ofs) { - int remainder = max(start_ofs - pos, 0); - buf = bvec_kmap_irq(&bv, &flags); - memset(buf + remainder, 0, - bv.bv_len - remainder); - flush_dcache_page(bv.bv_page); - bvec_kunmap_irq(buf, &flags); - } - pos += bv.bv_len; - } - - chain = chain->bi_next; - } -} - /* * similar to zero_bio_chain(), zeros data defined by a page array, * starting at the given byte offset from the start of the array and @@ -1351,90 +1306,6 @@ static void zero_pages(struct page **pages, u64 offset, u64 end) } } -/* - * Clone a portion of a bio, starting at the given byte offset - * and continuing for the number of bytes indicated. - */ -static struct bio *bio_clone_range(struct bio *bio_src, - unsigned int offset, - unsigned int len, - gfp_t gfpmask) -{ - struct bio *bio; - - bio = bio_clone_fast(bio_src, gfpmask, rbd_bio_clone); - if (!bio) - return NULL; /* ENOMEM */ - - bio_advance(bio, offset); - bio->bi_iter.bi_size = len; - - return bio; -} - -/* - * Clone a portion of a bio chain, starting at the given byte offset - * into the first bio in the source chain and continuing for the - * number of bytes indicated. The result is another bio chain of - * exactly the given length, or a null pointer on error. - * - * The bio_src and offset parameters are both in-out. On entry they - * refer to the first source bio and the offset into that bio where - * the start of data to be cloned is located. - * - * On return, bio_src is updated to refer to the bio in the source - * chain that contains first un-cloned byte, and *offset will - * contain the offset of that byte within that bio. - */ -static struct bio *bio_chain_clone_range(struct bio **bio_src, - unsigned int *offset, - unsigned int len, - gfp_t gfpmask) -{ - struct bio *bi = *bio_src; - unsigned int off = *offset; - struct bio *chain = NULL; - struct bio **end; - - /* Build up a chain of clone bios up to the limit */ - - if (!bi || off >= bi->bi_iter.bi_size || !len) - return NULL; /* Nothing to clone */ - - end = &chain; - while (len) { - unsigned int bi_size; - struct bio *bio; - - if (!bi) { - rbd_warn(NULL, "bio_chain exhausted with %u left", len); - goto out_err; /* EINVAL; ran out of bio's */ - } - bi_size = min_t(unsigned int, bi->bi_iter.bi_size - off, len); - bio = bio_clone_range(bi, off, bi_size, gfpmask); - if (!bio) - goto out_err; /* ENOMEM */ - - *end = bio; - end = &bio->bi_next; - - off += bi_size; - if (off == bi->bi_iter.bi_size) { - bi = bi->bi_next; - off = 0; - } - len -= bi_size; - } - *bio_src = bi; - *offset = off; - - return chain; -out_err: - bio_chain_put(chain); - - return NULL; -} - /* * The default/initial value for all object request flags is 0. For * each flag, once its value is set to 1 it is never reset to 0 @@ -6390,16 +6261,8 @@ static int rbd_slab_init(void) if (!rbd_obj_request_cache) goto out_err; - rbd_assert(!rbd_bio_clone); - rbd_bio_clone = bioset_create(BIO_POOL_SIZE, 0, 0); - if (!rbd_bio_clone) - goto out_err_clone; - return 0; -out_err_clone: - kmem_cache_destroy(rbd_obj_request_cache); - rbd_obj_request_cache = NULL; out_err: kmem_cache_destroy(rbd_img_request_cache); rbd_img_request_cache = NULL; @@ -6415,10 +6278,6 @@ static void rbd_slab_exit(void) rbd_assert(rbd_img_request_cache); kmem_cache_destroy(rbd_img_request_cache); rbd_img_request_cache = NULL; - - rbd_assert(rbd_bio_clone); - bioset_free(rbd_bio_clone); - rbd_bio_clone = NULL; } static int __init rbd_init(void) -- cgit v1.2.3-59-g8ed1b From 06fbb6993504974db6334a80b6796d6522ad45eb Mon Sep 17 00:00:00 2001 From: Ilya Dryomov Date: Sat, 20 Jan 2018 10:30:10 +0100 Subject: rbd: don't (ab)use obj_req->pages for stat requests obj_req->pages is for provided data buffers. stat requests are internal and should be NODATA. Signed-off-by: Ilya Dryomov Reviewed-by: Alex Elder --- drivers/block/rbd.c | 15 +++++---------- 1 file changed, 5 insertions(+), 10 deletions(-) diff --git a/drivers/block/rbd.c b/drivers/block/rbd.c index 8b9047369ab9..aa3f6a6de12c 100644 --- a/drivers/block/rbd.c +++ b/drivers/block/rbd.c @@ -2645,11 +2645,9 @@ static int rbd_img_obj_exists_submit(struct rbd_obj_request *obj_request) struct rbd_device *rbd_dev = obj_request->img_request->rbd_dev; struct rbd_obj_request *stat_request; struct page **pages; - u32 page_count; - size_t size; int ret; - stat_request = rbd_obj_request_create(OBJ_REQUEST_PAGES); + stat_request = rbd_obj_request_create(OBJ_REQUEST_NODATA); if (!stat_request) return -ENOMEM; @@ -2670,22 +2668,19 @@ static int rbd_img_obj_exists_submit(struct rbd_obj_request *obj_request) * le32 tv_nsec; * } mtime; */ - size = sizeof (__le64) + sizeof (__le32) + sizeof (__le32); - page_count = (u32)calc_pages_for(0, size); - pages = ceph_alloc_page_vector(page_count, GFP_NOIO); + pages = ceph_alloc_page_vector(1, GFP_NOIO); if (IS_ERR(pages)) { ret = PTR_ERR(pages); goto fail_stat_request; } osd_req_op_init(stat_request->osd_req, 0, CEPH_OSD_OP_STAT, 0); - osd_req_op_raw_data_in_pages(stat_request->osd_req, 0, pages, size, 0, - false, false); + osd_req_op_raw_data_in_pages(stat_request->osd_req, 0, pages, + 8 + sizeof(struct ceph_timespec), + 0, false, true); rbd_obj_request_get(obj_request); stat_request->obj_request = obj_request; - stat_request->pages = pages; - stat_request->page_count = page_count; stat_request->callback = rbd_img_obj_exists_callback; rbd_obj_request_submit(stat_request); -- cgit v1.2.3-59-g8ed1b From f9dcbc44cd317ee3c5e443db7f9a62f52689f08e Mon Sep 17 00:00:00 2001 From: Ilya Dryomov Date: Sat, 20 Jan 2018 10:30:11 +0100 Subject: rbd: get rid of img_req->copyup_pages The initiating object request is the proper owner -- save a bit of space. Signed-off-by: Ilya Dryomov Reviewed-by: Alex Elder --- drivers/block/rbd.c | 43 +++++++++---------------------------------- 1 file changed, 9 insertions(+), 34 deletions(-) diff --git a/drivers/block/rbd.c b/drivers/block/rbd.c index aa3f6a6de12c..722422e62b36 100644 --- a/drivers/block/rbd.c +++ b/drivers/block/rbd.c @@ -309,8 +309,6 @@ struct rbd_img_request { struct request *rq; /* block request */ struct rbd_obj_request *obj_request; /* obj req initiator */ }; - struct page **copyup_pages; - u32 copyup_page_count; spinlock_t completion_lock;/* protects next_completion */ u32 next_completion; rbd_img_callback_t callback; @@ -1940,6 +1938,9 @@ static void rbd_obj_request_destroy(struct kref *kref) break; } + ceph_release_page_vector(obj_request->copyup_pages, + obj_request->copyup_page_count); + kmem_cache_free(rbd_obj_request_cache, obj_request); } @@ -2372,8 +2373,6 @@ rbd_osd_copyup_callback(struct rbd_obj_request *obj_request) { struct rbd_img_request *img_request; struct rbd_device *rbd_dev; - struct page **pages; - u32 page_count; dout("%s: obj %p\n", __func__, obj_request); @@ -2386,14 +2385,6 @@ rbd_osd_copyup_callback(struct rbd_obj_request *obj_request) rbd_dev = img_request->rbd_dev; rbd_assert(rbd_dev); - pages = obj_request->copyup_pages; - rbd_assert(pages != NULL); - obj_request->copyup_pages = NULL; - page_count = obj_request->copyup_page_count; - rbd_assert(page_count); - obj_request->copyup_page_count = 0; - ceph_release_page_vector(pages, page_count); - /* * We want the transfer count to reflect the size of the * original write request. There is no such thing as a @@ -2412,9 +2403,7 @@ rbd_img_obj_parent_read_full_callback(struct rbd_img_request *img_request) struct rbd_obj_request *orig_request; struct ceph_osd_request *osd_req; struct rbd_device *rbd_dev; - struct page **pages; enum obj_operation_type op_type; - u32 page_count; int img_result; u64 parent_length; @@ -2422,13 +2411,6 @@ rbd_img_obj_parent_read_full_callback(struct rbd_img_request *img_request) /* First get what we need from the image request */ - pages = img_request->copyup_pages; - rbd_assert(pages != NULL); - img_request->copyup_pages = NULL; - page_count = img_request->copyup_page_count; - rbd_assert(page_count); - img_request->copyup_page_count = 0; - orig_request = img_request->obj_request; rbd_assert(orig_request != NULL); rbd_assert(obj_request_type_valid(orig_request->type)); @@ -2447,7 +2429,6 @@ rbd_img_obj_parent_read_full_callback(struct rbd_img_request *img_request) * and re-submit the original write request. */ if (!rbd_dev->parent_overlap) { - ceph_release_page_vector(pages, page_count); rbd_obj_request_submit(orig_request); return; } @@ -2467,14 +2448,12 @@ rbd_img_obj_parent_read_full_callback(struct rbd_img_request *img_request) goto out_err; rbd_osd_req_destroy(orig_request->osd_req); orig_request->osd_req = osd_req; - orig_request->copyup_pages = pages; - orig_request->copyup_page_count = page_count; /* Initialize the copyup op */ osd_req_op_cls_init(osd_req, 0, CEPH_OSD_OP_CALL, "rbd", "copyup"); - osd_req_op_cls_request_data_pages(osd_req, 0, pages, parent_length, 0, - false, false); + osd_req_op_cls_request_data_pages(osd_req, 0, orig_request->copyup_pages, + parent_length, 0, false, false); /* Add the other op(s) */ @@ -2487,7 +2466,6 @@ rbd_img_obj_parent_read_full_callback(struct rbd_img_request *img_request) return; out_err: - ceph_release_page_vector(pages, page_count); rbd_obj_request_error(orig_request, img_result); } @@ -2542,10 +2520,13 @@ static int rbd_img_obj_parent_read_full(struct rbd_obj_request *obj_request) pages = ceph_alloc_page_vector(page_count, GFP_NOIO); if (IS_ERR(pages)) { result = PTR_ERR(pages); - pages = NULL; goto out_err; } + rbd_assert(!obj_request->copyup_pages); + obj_request->copyup_pages = pages; + obj_request->copyup_page_count = page_count; + result = -ENOMEM; parent_request = rbd_parent_request_create(obj_request, img_offset, length); @@ -2556,19 +2537,13 @@ static int rbd_img_obj_parent_read_full(struct rbd_obj_request *obj_request) if (result) goto out_err; - parent_request->copyup_pages = pages; - parent_request->copyup_page_count = page_count; parent_request->callback = rbd_img_obj_parent_read_full_callback; result = rbd_img_request_submit(parent_request); if (!result) return 0; - parent_request->copyup_pages = NULL; - parent_request->copyup_page_count = 0; out_err: - if (pages) - ceph_release_page_vector(pages, page_count); if (parent_request) rbd_img_request_put(parent_request); return result; -- cgit v1.2.3-59-g8ed1b From b9e281c2b38804984d619e1d9efc4b9020bcb291 Mon Sep 17 00:00:00 2001 From: Ilya Dryomov Date: Sat, 20 Jan 2018 10:30:11 +0100 Subject: libceph: introduce BVECS data type In preparation for rbd "fancy" striping, introduce ceph_bvec_iter for working with bio_vec array data buffers. The wrappers are trivial, but make it look similar to ceph_bio_iter. Signed-off-by: Ilya Dryomov --- include/linux/ceph/messenger.h | 42 +++++++++++++++++++++++ include/linux/ceph/osd_client.h | 8 +++++ net/ceph/messenger.c | 75 +++++++++++++++++++++++++++++++++++++++++ net/ceph/osd_client.c | 39 +++++++++++++++++++++ 4 files changed, 164 insertions(+) diff --git a/include/linux/ceph/messenger.h b/include/linux/ceph/messenger.h index d7b9605fd51d..c7dfcb8a1fb2 100644 --- a/include/linux/ceph/messenger.h +++ b/include/linux/ceph/messenger.h @@ -76,6 +76,7 @@ enum ceph_msg_data_type { #ifdef CONFIG_BLOCK CEPH_MSG_DATA_BIO, /* data source/destination is a bio list */ #endif /* CONFIG_BLOCK */ + CEPH_MSG_DATA_BVECS, /* data source/destination is a bio_vec array */ }; static __inline__ bool ceph_msg_data_type_valid(enum ceph_msg_data_type type) @@ -87,6 +88,7 @@ static __inline__ bool ceph_msg_data_type_valid(enum ceph_msg_data_type type) #ifdef CONFIG_BLOCK case CEPH_MSG_DATA_BIO: #endif /* CONFIG_BLOCK */ + case CEPH_MSG_DATA_BVECS: return true; default: return false; @@ -139,6 +141,42 @@ struct ceph_bio_iter { #endif /* CONFIG_BLOCK */ +struct ceph_bvec_iter { + struct bio_vec *bvecs; + struct bvec_iter iter; +}; + +#define __ceph_bvec_iter_advance_step(it, n, STEP) do { \ + BUG_ON((n) > (it)->iter.bi_size); \ + (void)(STEP); \ + bvec_iter_advance((it)->bvecs, &(it)->iter, (n)); \ +} while (0) + +/* + * Advance @it by @n bytes. + */ +#define ceph_bvec_iter_advance(it, n) \ + __ceph_bvec_iter_advance_step(it, n, 0) + +/* + * Advance @it by @n bytes, executing BVEC_STEP for each bio_vec. + */ +#define ceph_bvec_iter_advance_step(it, n, BVEC_STEP) \ + __ceph_bvec_iter_advance_step(it, n, ({ \ + struct bio_vec bv; \ + struct bvec_iter __cur_iter; \ + \ + __cur_iter = (it)->iter; \ + __cur_iter.bi_size = (n); \ + for_each_bvec(bv, (it)->bvecs, __cur_iter, __cur_iter) \ + (void)(BVEC_STEP); \ + })) + +#define ceph_bvec_iter_shorten(it, n) do { \ + BUG_ON((n) > (it)->iter.bi_size); \ + (it)->iter.bi_size = (n); \ +} while (0) + struct ceph_msg_data { struct list_head links; /* ceph_msg->data */ enum ceph_msg_data_type type; @@ -149,6 +187,7 @@ struct ceph_msg_data { u32 bio_length; }; #endif /* CONFIG_BLOCK */ + struct ceph_bvec_iter bvec_pos; struct { struct page **pages; /* NOT OWNER. */ size_t length; /* total # bytes */ @@ -170,6 +209,7 @@ struct ceph_msg_data_cursor { #ifdef CONFIG_BLOCK struct ceph_bio_iter bio_iter; #endif /* CONFIG_BLOCK */ + struct bvec_iter bvec_iter; struct { /* pages */ unsigned int page_offset; /* offset in page */ unsigned short page_index; /* index in array */ @@ -336,6 +376,8 @@ extern void ceph_msg_data_add_pagelist(struct ceph_msg *msg, void ceph_msg_data_add_bio(struct ceph_msg *msg, struct ceph_bio_iter *bio_pos, u32 length); #endif /* CONFIG_BLOCK */ +void ceph_msg_data_add_bvecs(struct ceph_msg *msg, + struct ceph_bvec_iter *bvec_pos); extern struct ceph_msg *ceph_msg_new(int type, int front_len, gfp_t flags, bool can_fail); diff --git a/include/linux/ceph/osd_client.h b/include/linux/ceph/osd_client.h index 315691490cb0..528ccc943cee 100644 --- a/include/linux/ceph/osd_client.h +++ b/include/linux/ceph/osd_client.h @@ -57,6 +57,7 @@ enum ceph_osd_data_type { #ifdef CONFIG_BLOCK CEPH_OSD_DATA_TYPE_BIO, #endif /* CONFIG_BLOCK */ + CEPH_OSD_DATA_TYPE_BVECS, }; struct ceph_osd_data { @@ -76,6 +77,7 @@ struct ceph_osd_data { u32 bio_length; }; #endif /* CONFIG_BLOCK */ + struct ceph_bvec_iter bvec_pos; }; }; @@ -410,6 +412,9 @@ void osd_req_op_extent_osd_data_bio(struct ceph_osd_request *osd_req, struct ceph_bio_iter *bio_pos, u32 bio_length); #endif /* CONFIG_BLOCK */ +void osd_req_op_extent_osd_data_bvec_pos(struct ceph_osd_request *osd_req, + unsigned int which, + struct ceph_bvec_iter *bvec_pos); extern void osd_req_op_cls_request_data_pagelist(struct ceph_osd_request *, unsigned int which, @@ -419,6 +424,9 @@ extern void osd_req_op_cls_request_data_pages(struct ceph_osd_request *, struct page **pages, u64 length, u32 alignment, bool pages_from_pool, bool own_pages); +void osd_req_op_cls_request_data_bvecs(struct ceph_osd_request *osd_req, + unsigned int which, + struct bio_vec *bvecs, u32 bytes); extern void osd_req_op_cls_response_data_pages(struct ceph_osd_request *, unsigned int which, struct page **pages, u64 length, diff --git a/net/ceph/messenger.c b/net/ceph/messenger.c index b9fa8b869c08..91a57857cf11 100644 --- a/net/ceph/messenger.c +++ b/net/ceph/messenger.c @@ -894,6 +894,58 @@ static bool ceph_msg_data_bio_advance(struct ceph_msg_data_cursor *cursor, } #endif /* CONFIG_BLOCK */ +static void ceph_msg_data_bvecs_cursor_init(struct ceph_msg_data_cursor *cursor, + size_t length) +{ + struct ceph_msg_data *data = cursor->data; + struct bio_vec *bvecs = data->bvec_pos.bvecs; + + cursor->resid = min_t(size_t, length, data->bvec_pos.iter.bi_size); + cursor->bvec_iter = data->bvec_pos.iter; + cursor->bvec_iter.bi_size = cursor->resid; + + BUG_ON(cursor->resid < bvec_iter_len(bvecs, cursor->bvec_iter)); + cursor->last_piece = + cursor->resid == bvec_iter_len(bvecs, cursor->bvec_iter); +} + +static struct page *ceph_msg_data_bvecs_next(struct ceph_msg_data_cursor *cursor, + size_t *page_offset, + size_t *length) +{ + struct bio_vec bv = bvec_iter_bvec(cursor->data->bvec_pos.bvecs, + cursor->bvec_iter); + + *page_offset = bv.bv_offset; + *length = bv.bv_len; + return bv.bv_page; +} + +static bool ceph_msg_data_bvecs_advance(struct ceph_msg_data_cursor *cursor, + size_t bytes) +{ + struct bio_vec *bvecs = cursor->data->bvec_pos.bvecs; + + BUG_ON(bytes > cursor->resid); + BUG_ON(bytes > bvec_iter_len(bvecs, cursor->bvec_iter)); + cursor->resid -= bytes; + bvec_iter_advance(bvecs, &cursor->bvec_iter, bytes); + + if (!cursor->resid) { + BUG_ON(!cursor->last_piece); + return false; /* no more data */ + } + + if (!bytes || cursor->bvec_iter.bi_bvec_done) + return false; /* more bytes to process in this segment */ + + BUG_ON(cursor->last_piece); + BUG_ON(cursor->resid < bvec_iter_len(bvecs, cursor->bvec_iter)); + cursor->last_piece = + cursor->resid == bvec_iter_len(bvecs, cursor->bvec_iter); + return true; +} + /* * For a page array, a piece comes from the first page in the array * that has not already been fully consumed. @@ -1077,6 +1129,9 @@ static void __ceph_msg_data_cursor_init(struct ceph_msg_data_cursor *cursor) ceph_msg_data_bio_cursor_init(cursor, length); break; #endif /* CONFIG_BLOCK */ + case CEPH_MSG_DATA_BVECS: + ceph_msg_data_bvecs_cursor_init(cursor, length); + break; case CEPH_MSG_DATA_NONE: default: /* BUG(); */ @@ -1125,6 +1180,9 @@ static struct page *ceph_msg_data_next(struct ceph_msg_data_cursor *cursor, page = ceph_msg_data_bio_next(cursor, page_offset, length); break; #endif /* CONFIG_BLOCK */ + case CEPH_MSG_DATA_BVECS: + page = ceph_msg_data_bvecs_next(cursor, page_offset, length); + break; case CEPH_MSG_DATA_NONE: default: page = NULL; @@ -1163,6 +1221,9 @@ static void ceph_msg_data_advance(struct ceph_msg_data_cursor *cursor, new_piece = ceph_msg_data_bio_advance(cursor, bytes); break; #endif /* CONFIG_BLOCK */ + case CEPH_MSG_DATA_BVECS: + new_piece = ceph_msg_data_bvecs_advance(cursor, bytes); + break; case CEPH_MSG_DATA_NONE: default: BUG(); @@ -3247,6 +3308,20 @@ void ceph_msg_data_add_bio(struct ceph_msg *msg, struct ceph_bio_iter *bio_pos, EXPORT_SYMBOL(ceph_msg_data_add_bio); #endif /* CONFIG_BLOCK */ +void ceph_msg_data_add_bvecs(struct ceph_msg *msg, + struct ceph_bvec_iter *bvec_pos) +{ + struct ceph_msg_data *data; + + data = ceph_msg_data_create(CEPH_MSG_DATA_BVECS); + BUG_ON(!data); + data->bvec_pos = *bvec_pos; + + list_add_tail(&data->links, &msg->data); + msg->data_length += bvec_pos->iter.bi_size; +} +EXPORT_SYMBOL(ceph_msg_data_add_bvecs); + /* * construct a new message with given type, size * the new msg has a ref count of 1. diff --git a/net/ceph/osd_client.c b/net/ceph/osd_client.c index 339d8773ebe8..407be0533c18 100644 --- a/net/ceph/osd_client.c +++ b/net/ceph/osd_client.c @@ -155,6 +155,13 @@ static void ceph_osd_data_bio_init(struct ceph_osd_data *osd_data, } #endif /* CONFIG_BLOCK */ +static void ceph_osd_data_bvecs_init(struct ceph_osd_data *osd_data, + struct ceph_bvec_iter *bvec_pos) +{ + osd_data->type = CEPH_OSD_DATA_TYPE_BVECS; + osd_data->bvec_pos = *bvec_pos; +} + #define osd_req_op_data(oreq, whch, typ, fld) \ ({ \ struct ceph_osd_request *__oreq = (oreq); \ @@ -229,6 +236,17 @@ void osd_req_op_extent_osd_data_bio(struct ceph_osd_request *osd_req, EXPORT_SYMBOL(osd_req_op_extent_osd_data_bio); #endif /* CONFIG_BLOCK */ +void osd_req_op_extent_osd_data_bvec_pos(struct ceph_osd_request *osd_req, + unsigned int which, + struct ceph_bvec_iter *bvec_pos) +{ + struct ceph_osd_data *osd_data; + + osd_data = osd_req_op_data(osd_req, which, extent, osd_data); + ceph_osd_data_bvecs_init(osd_data, bvec_pos); +} +EXPORT_SYMBOL(osd_req_op_extent_osd_data_bvec_pos); + static void osd_req_op_cls_request_info_pagelist( struct ceph_osd_request *osd_req, unsigned int which, struct ceph_pagelist *pagelist) @@ -266,6 +284,23 @@ void osd_req_op_cls_request_data_pages(struct ceph_osd_request *osd_req, } EXPORT_SYMBOL(osd_req_op_cls_request_data_pages); +void osd_req_op_cls_request_data_bvecs(struct ceph_osd_request *osd_req, + unsigned int which, + struct bio_vec *bvecs, u32 bytes) +{ + struct ceph_osd_data *osd_data; + struct ceph_bvec_iter it = { + .bvecs = bvecs, + .iter = { .bi_size = bytes }, + }; + + osd_data = osd_req_op_data(osd_req, which, cls, request_data); + ceph_osd_data_bvecs_init(osd_data, &it); + osd_req->r_ops[which].cls.indata_len += bytes; + osd_req->r_ops[which].indata_len += bytes; +} +EXPORT_SYMBOL(osd_req_op_cls_request_data_bvecs); + void osd_req_op_cls_response_data_pages(struct ceph_osd_request *osd_req, unsigned int which, struct page **pages, u64 length, u32 alignment, bool pages_from_pool, bool own_pages) @@ -291,6 +326,8 @@ static u64 ceph_osd_data_length(struct ceph_osd_data *osd_data) case CEPH_OSD_DATA_TYPE_BIO: return (u64)osd_data->bio_length; #endif /* CONFIG_BLOCK */ + case CEPH_OSD_DATA_TYPE_BVECS: + return osd_data->bvec_pos.iter.bi_size; default: WARN(true, "unrecognized data type %d\n", (int)osd_data->type); return 0; @@ -831,6 +868,8 @@ static void ceph_osdc_msg_data_add(struct ceph_msg *msg, } else if (osd_data->type == CEPH_OSD_DATA_TYPE_BIO) { ceph_msg_data_add_bio(msg, &osd_data->bio_pos, length); #endif + } else if (osd_data->type == CEPH_OSD_DATA_TYPE_BVECS) { + ceph_msg_data_add_bvecs(msg, &osd_data->bvec_pos); } else { BUG_ON(osd_data->type != CEPH_OSD_DATA_TYPE_NONE); } -- cgit v1.2.3-59-g8ed1b From 7e07efb12db96c2f7c5fafeccada327d1f869e60 Mon Sep 17 00:00:00 2001 From: Ilya Dryomov Date: Sat, 20 Jan 2018 10:30:11 +0100 Subject: rbd: move from raw pages to bvec data descriptors In preparation for rbd "fancy" striping which requires bio_vec arrays, wire up BVECS data type and kill off PAGES data type. There is nothing wrong with using page vectors for copyup requests -- it's just less iterator boilerplate code to write for the new striping framework. Signed-off-by: Ilya Dryomov Reviewed-by: Alex Elder --- drivers/block/rbd.c | 155 ++++++++++++++++++++++++++-------------------------- 1 file changed, 77 insertions(+), 78 deletions(-) diff --git a/drivers/block/rbd.c b/drivers/block/rbd.c index 722422e62b36..bff3e138543f 100644 --- a/drivers/block/rbd.c +++ b/drivers/block/rbd.c @@ -219,7 +219,7 @@ typedef void (*rbd_obj_callback_t)(struct rbd_obj_request *); enum obj_request_type { OBJ_REQUEST_NODATA = 1, OBJ_REQUEST_BIO, /* pointer into provided bio (list) */ - OBJ_REQUEST_PAGES, + OBJ_REQUEST_BVECS, /* pointer into provided bio_vec array */ }; enum obj_operation_type { @@ -272,12 +272,12 @@ struct rbd_obj_request { union { struct ceph_bio_iter bio_pos; struct { - struct page **pages; - u32 page_count; + struct ceph_bvec_iter bvec_pos; + u32 bvec_count; }; }; - struct page **copyup_pages; - u32 copyup_page_count; + struct bio_vec *copyup_bvecs; + u32 copyup_bvec_count; struct ceph_osd_request *osd_req; @@ -1272,36 +1272,14 @@ static void zero_bios(struct ceph_bio_iter *bio_pos, u32 off, u32 bytes) })); } -/* - * similar to zero_bio_chain(), zeros data defined by a page array, - * starting at the given byte offset from the start of the array and - * continuing up to the given end offset. The pages array is - * assumed to be big enough to hold all bytes up to the end. - */ -static void zero_pages(struct page **pages, u64 offset, u64 end) +static void zero_bvecs(struct ceph_bvec_iter *bvec_pos, u32 off, u32 bytes) { - struct page **page = &pages[offset >> PAGE_SHIFT]; - - rbd_assert(end > offset); - rbd_assert(end - offset <= (u64)SIZE_MAX); - while (offset < end) { - size_t page_offset; - size_t length; - unsigned long flags; - void *kaddr; - - page_offset = offset & ~PAGE_MASK; - length = min_t(size_t, PAGE_SIZE - page_offset, end - offset); - local_irq_save(flags); - kaddr = kmap_atomic(*page); - memset(kaddr + page_offset, 0, length); - flush_dcache_page(*page); - kunmap_atomic(kaddr); - local_irq_restore(flags); + struct ceph_bvec_iter it = *bvec_pos; - offset += length; - page++; - } + ceph_bvec_iter_advance(&it, off); + ceph_bvec_iter_advance_step(&it, bytes, ({ + zero_bvec(&bv); + })); } /* @@ -1461,7 +1439,7 @@ static bool obj_request_type_valid(enum obj_request_type type) switch (type) { case OBJ_REQUEST_NODATA: case OBJ_REQUEST_BIO: - case OBJ_REQUEST_PAGES: + case OBJ_REQUEST_BVECS: return true; default: return false; @@ -1611,14 +1589,15 @@ rbd_img_obj_request_read_callback(struct rbd_obj_request *obj_request) if (obj_request->type == OBJ_REQUEST_BIO) zero_bios(&obj_request->bio_pos, 0, length); else - zero_pages(obj_request->pages, 0, length); + zero_bvecs(&obj_request->bvec_pos, 0, length); obj_request->result = 0; } else if (xferred < length && !obj_request->result) { if (obj_request->type == OBJ_REQUEST_BIO) zero_bios(&obj_request->bio_pos, xferred, length - xferred); else - zero_pages(obj_request->pages, xferred, length); + zero_bvecs(&obj_request->bvec_pos, xferred, + length - xferred); } obj_request->xferred = length; obj_request_done_set(obj_request); @@ -1913,6 +1892,7 @@ rbd_obj_request_create(enum obj_request_type type) static void rbd_obj_request_destroy(struct kref *kref) { struct rbd_obj_request *obj_request; + u32 i; obj_request = container_of(kref, struct rbd_obj_request, kref); @@ -1924,22 +1904,22 @@ static void rbd_obj_request_destroy(struct kref *kref) if (obj_request->osd_req) rbd_osd_req_destroy(obj_request->osd_req); - rbd_assert(obj_request_type_valid(obj_request->type)); switch (obj_request->type) { case OBJ_REQUEST_NODATA: case OBJ_REQUEST_BIO: + case OBJ_REQUEST_BVECS: break; /* Nothing to do */ - case OBJ_REQUEST_PAGES: - /* img_data requests don't own their page array */ - if (obj_request->pages && - !obj_request_img_data_test(obj_request)) - ceph_release_page_vector(obj_request->pages, - obj_request->page_count); - break; + default: + rbd_assert(0); } - ceph_release_page_vector(obj_request->copyup_pages, - obj_request->copyup_page_count); + if (obj_request->copyup_bvecs) { + for (i = 0; i < obj_request->copyup_bvec_count; i++) { + if (obj_request->copyup_bvecs[i].bv_page) + __free_page(obj_request->copyup_bvecs[i].bv_page); + } + kfree(obj_request->copyup_bvecs); + } kmem_cache_free(rbd_obj_request_cache, obj_request); } @@ -2260,10 +2240,9 @@ static void rbd_img_obj_request_fill(struct rbd_obj_request *obj_request, if (obj_request->type == OBJ_REQUEST_BIO) osd_req_op_extent_osd_data_bio(osd_request, num_ops, &obj_request->bio_pos, length); - else if (obj_request->type == OBJ_REQUEST_PAGES) - osd_req_op_extent_osd_data_pages(osd_request, num_ops, - obj_request->pages, length, - offset & ~PAGE_MASK, false, false); + else if (obj_request->type == OBJ_REQUEST_BVECS) + osd_req_op_extent_osd_data_bvec_pos(osd_request, num_ops, + &obj_request->bvec_pos); /* Discards are also writes */ if (op_type == OBJ_OP_WRITE || op_type == OBJ_OP_DISCARD) @@ -2288,7 +2267,7 @@ static int rbd_img_request_fill(struct rbd_img_request *img_request, struct rbd_obj_request *obj_request = NULL; struct rbd_obj_request *next_obj_request; struct ceph_bio_iter bio_it; - struct page **pages = NULL; + struct ceph_bvec_iter bvec_it; enum obj_operation_type op_type; u64 img_offset; u64 resid; @@ -2305,8 +2284,8 @@ static int rbd_img_request_fill(struct rbd_img_request *img_request, bio_it = *(struct ceph_bio_iter *)data_desc; rbd_assert(img_offset == bio_it.iter.bi_sector << SECTOR_SHIFT); - } else if (type == OBJ_REQUEST_PAGES) { - pages = data_desc; + } else if (type == OBJ_REQUEST_BVECS) { + bvec_it = *(struct ceph_bvec_iter *)data_desc; } while (resid) { @@ -2332,15 +2311,10 @@ static int rbd_img_request_fill(struct rbd_img_request *img_request, if (type == OBJ_REQUEST_BIO) { obj_request->bio_pos = bio_it; ceph_bio_iter_advance(&bio_it, length); - } else if (type == OBJ_REQUEST_PAGES) { - unsigned int page_count; - - obj_request->pages = pages; - page_count = (u32)calc_pages_for(offset, length); - obj_request->page_count = page_count; - if ((offset + length) & ~PAGE_MASK) - page_count--; /* more on last page */ - pages += page_count; + } else if (type == OBJ_REQUEST_BVECS) { + obj_request->bvec_pos = bvec_it; + ceph_bvec_iter_shorten(&obj_request->bvec_pos, length); + ceph_bvec_iter_advance(&bvec_it, length); } osd_req = rbd_osd_req_create(rbd_dev, op_type, @@ -2452,8 +2426,8 @@ rbd_img_obj_parent_read_full_callback(struct rbd_img_request *img_request) /* Initialize the copyup op */ osd_req_op_cls_init(osd_req, 0, CEPH_OSD_OP_CALL, "rbd", "copyup"); - osd_req_op_cls_request_data_pages(osd_req, 0, orig_request->copyup_pages, - parent_length, 0, false, false); + osd_req_op_cls_request_data_bvecs(osd_req, 0, orig_request->copyup_bvecs, + parent_length); /* Add the other op(s) */ @@ -2469,6 +2443,8 @@ out_err: rbd_obj_request_error(orig_request, img_result); } +static int setup_copyup_bvecs(struct rbd_obj_request *obj_req, u64 obj_overlap); + /* * Read from the parent image the range of data that covers the * entire target of the given object request. This is used for @@ -2487,10 +2463,9 @@ static int rbd_img_obj_parent_read_full(struct rbd_obj_request *obj_request) { struct rbd_device *rbd_dev = obj_request->img_request->rbd_dev; struct rbd_img_request *parent_request = NULL; + struct ceph_bvec_iter bvec_it = { 0 }; u64 img_offset; u64 length; - struct page **pages = NULL; - u32 page_count; int result; rbd_assert(rbd_dev->parent != NULL); @@ -2516,16 +2491,9 @@ static int rbd_img_obj_parent_read_full(struct rbd_obj_request *obj_request) * Allocate a page array big enough to receive the data read * from the parent. */ - page_count = (u32)calc_pages_for(0, length); - pages = ceph_alloc_page_vector(page_count, GFP_NOIO); - if (IS_ERR(pages)) { - result = PTR_ERR(pages); + result = setup_copyup_bvecs(obj_request, length); + if (result) goto out_err; - } - - rbd_assert(!obj_request->copyup_pages); - obj_request->copyup_pages = pages; - obj_request->copyup_page_count = page_count; result = -ENOMEM; parent_request = rbd_parent_request_create(obj_request, @@ -2533,7 +2501,10 @@ static int rbd_img_obj_parent_read_full(struct rbd_obj_request *obj_request) if (!parent_request) goto out_err; - result = rbd_img_request_fill(parent_request, OBJ_REQUEST_PAGES, pages); + bvec_it.bvecs = obj_request->copyup_bvecs; + bvec_it.iter.bi_size = length; + result = rbd_img_request_fill(parent_request, OBJ_REQUEST_BVECS, + &bvec_it); if (result) goto out_err; @@ -2751,6 +2722,34 @@ out_put_ireq: return ret; } +static int setup_copyup_bvecs(struct rbd_obj_request *obj_req, u64 obj_overlap) +{ + u32 i; + + rbd_assert(!obj_req->copyup_bvecs); + obj_req->copyup_bvec_count = calc_pages_for(0, obj_overlap); + obj_req->copyup_bvecs = kcalloc(obj_req->copyup_bvec_count, + sizeof(*obj_req->copyup_bvecs), + GFP_NOIO); + if (!obj_req->copyup_bvecs) + return -ENOMEM; + + for (i = 0; i < obj_req->copyup_bvec_count; i++) { + unsigned int len = min(obj_overlap, (u64)PAGE_SIZE); + + obj_req->copyup_bvecs[i].bv_page = alloc_page(GFP_NOIO); + if (!obj_req->copyup_bvecs[i].bv_page) + return -ENOMEM; + + obj_req->copyup_bvecs[i].bv_offset = 0; + obj_req->copyup_bvecs[i].bv_len = len; + obj_overlap -= len; + } + + rbd_assert(!obj_overlap); + return 0; +} + static void rbd_img_parent_read_callback(struct rbd_img_request *img_request) { struct rbd_obj_request *obj_request; @@ -2832,8 +2831,8 @@ static void rbd_img_parent_read(struct rbd_obj_request *obj_request) result = rbd_img_request_fill(img_request, OBJ_REQUEST_BIO, &obj_request->bio_pos); else - result = rbd_img_request_fill(img_request, OBJ_REQUEST_PAGES, - obj_request->pages); + result = rbd_img_request_fill(img_request, OBJ_REQUEST_BVECS, + &obj_request->bvec_pos); if (result) goto out_err; -- cgit v1.2.3-59-g8ed1b From 45a267dbb40f5cf15efa23ce815c4fe0b4674aa2 Mon Sep 17 00:00:00 2001 From: Ilya Dryomov Date: Mon, 22 Jan 2018 15:20:15 +0100 Subject: libceph: handle zero-length data items rbd needs this for null copyups -- if copyup data is all zeroes, we want to save some I/O and network bandwidth. See rbd_obj_issue_copyup() in the next commit. Signed-off-by: Ilya Dryomov Reviewed-by: Alex Elder --- net/ceph/messenger.c | 14 ++++++++++++-- 1 file changed, 12 insertions(+), 2 deletions(-) diff --git a/net/ceph/messenger.c b/net/ceph/messenger.c index 91a57857cf11..cee4b3d307de 100644 --- a/net/ceph/messenger.c +++ b/net/ceph/messenger.c @@ -1605,13 +1605,18 @@ static int write_partial_message_data(struct ceph_connection *con) * been revoked, so use the zero page. */ crc = do_datacrc ? le32_to_cpu(msg->footer.data_crc) : 0; - while (cursor->resid) { + while (cursor->total_resid) { struct page *page; size_t page_offset; size_t length; bool last_piece; int ret; + if (!cursor->resid) { + ceph_msg_data_advance(cursor, 0); + continue; + } + page = ceph_msg_data_next(cursor, &page_offset, &length, &last_piece); ret = ceph_tcp_sendpage(con->sock, page, page_offset, @@ -2327,7 +2332,12 @@ static int read_partial_msg_data(struct ceph_connection *con) if (do_datacrc) crc = con->in_data_crc; - while (cursor->resid) { + while (cursor->total_resid) { + if (!cursor->resid) { + ceph_msg_data_advance(cursor, 0); + continue; + } + page = ceph_msg_data_next(cursor, &page_offset, &length, NULL); ret = ceph_tcp_recvpage(con->sock, page, page_offset, length); if (ret <= 0) { -- cgit v1.2.3-59-g8ed1b From 3da691bf436690c4bb943d5d16e5934937625578 Mon Sep 17 00:00:00 2001 From: Ilya Dryomov Date: Mon, 29 Jan 2018 14:04:08 +0100 Subject: rbd: new request handling code The notable changes are: - instead of explicitly stat'ing the object to see if it exists before issuing the write, send the write optimistically along with the stat in a single OSD request - zero copyup optimization - all object requests are associated with an image request and have a valid ->img_request pointer; there are no standalone (!IMG_DATA) object requests anymore - code is structured as a state machine (vs a bunch of callbacks with implicit state) Signed-off-by: Ilya Dryomov --- drivers/block/rbd.c | 678 ++++++++++++++++++++++++++++++++++++++++++++++------ 1 file changed, 601 insertions(+), 77 deletions(-) diff --git a/drivers/block/rbd.c b/drivers/block/rbd.c index bff3e138543f..1bffad122dc2 100644 --- a/drivers/block/rbd.c +++ b/drivers/block/rbd.c @@ -235,11 +235,37 @@ enum obj_req_flags { OBJ_REQ_EXISTS, /* target exists: no = 0, yes = 1 */ }; +/* + * Writes go through the following state machine to deal with + * layering: + * + * need copyup + * RBD_OBJ_WRITE_GUARD ---------------> RBD_OBJ_WRITE_COPYUP + * | ^ | + * v \------------------------------/ + * done + * ^ + * | + * RBD_OBJ_WRITE_FLAT + * + * Writes start in RBD_OBJ_WRITE_GUARD or _FLAT, depending on whether + * there is a parent or not. + */ +enum rbd_obj_write_state { + RBD_OBJ_WRITE_FLAT = 1, + RBD_OBJ_WRITE_GUARD, + RBD_OBJ_WRITE_COPYUP, +}; + struct rbd_obj_request { u64 object_no; u64 offset; /* object start byte */ u64 length; /* bytes from offset */ unsigned long flags; + union { + bool tried_parent; /* for reads */ + enum rbd_obj_write_state write_state; /* for writes */ + }; /* * An object request associated with an image will have its @@ -1282,6 +1308,27 @@ static void zero_bvecs(struct ceph_bvec_iter *bvec_pos, u32 off, u32 bytes) })); } +/* + * Zero a range in @obj_req data buffer defined by a bio (list) or + * bio_vec array. + * + * @off is relative to the start of the data buffer. + */ +static void rbd_obj_zero_range(struct rbd_obj_request *obj_req, u32 off, + u32 bytes) +{ + switch (obj_req->type) { + case OBJ_REQUEST_BIO: + zero_bios(&obj_req->bio_pos, off, bytes); + break; + case OBJ_REQUEST_BVECS: + zero_bvecs(&obj_req->bvec_pos, off, bytes); + break; + default: + rbd_assert(0); + } +} + /* * The default/initial value for all object request flags is 0. For * each flag, once its value is set to 1 it is never reset to 0 @@ -1567,6 +1614,35 @@ rbd_img_request_op_type(struct rbd_img_request *img_request) return OBJ_OP_READ; } +static bool rbd_obj_is_entire(struct rbd_obj_request *obj_req) +{ + struct rbd_device *rbd_dev = obj_req->img_request->rbd_dev; + + return !obj_req->offset && + obj_req->length == rbd_dev->layout.object_size; +} + +static bool rbd_obj_is_tail(struct rbd_obj_request *obj_req) +{ + struct rbd_device *rbd_dev = obj_req->img_request->rbd_dev; + + return obj_req->offset + obj_req->length == + rbd_dev->layout.object_size; +} + +static bool rbd_img_is_write(struct rbd_img_request *img_req) +{ + switch (rbd_img_request_op_type(img_req)) { + case OBJ_OP_READ: + return false; + case OBJ_OP_WRITE: + case OBJ_OP_DISCARD: + return true; + default: + rbd_assert(0); + } +} + static void rbd_img_obj_request_read_callback(struct rbd_obj_request *obj_request) { @@ -1697,63 +1773,28 @@ static void rbd_osd_call_callback(struct rbd_obj_request *obj_request) obj_request_done_set(obj_request); } +static void rbd_obj_handle_request(struct rbd_obj_request *obj_req); + static void rbd_osd_req_callback(struct ceph_osd_request *osd_req) { - struct rbd_obj_request *obj_request = osd_req->r_priv; - u16 opcode; - - dout("%s: osd_req %p\n", __func__, osd_req); - rbd_assert(osd_req == obj_request->osd_req); - if (obj_request_img_data_test(obj_request)) { - rbd_assert(obj_request->img_request); - rbd_assert(obj_request->which != BAD_WHICH); - } else { - rbd_assert(obj_request->which == BAD_WHICH); - } + struct rbd_obj_request *obj_req = osd_req->r_priv; - if (osd_req->r_result < 0) - obj_request->result = osd_req->r_result; + dout("%s osd_req %p result %d for obj_req %p\n", __func__, osd_req, + osd_req->r_result, obj_req); + rbd_assert(osd_req == obj_req->osd_req); - /* - * We support a 64-bit length, but ultimately it has to be - * passed to the block layer, which just supports a 32-bit - * length field. - */ - obj_request->xferred = osd_req->r_ops[0].outdata_len; - rbd_assert(obj_request->xferred < (u64)UINT_MAX); - - opcode = osd_req->r_ops[0].op; - switch (opcode) { - case CEPH_OSD_OP_READ: - rbd_osd_read_callback(obj_request); - break; - case CEPH_OSD_OP_SETALLOCHINT: - rbd_assert(osd_req->r_ops[1].op == CEPH_OSD_OP_WRITE || - osd_req->r_ops[1].op == CEPH_OSD_OP_WRITEFULL); - /* fall through */ - case CEPH_OSD_OP_WRITE: - case CEPH_OSD_OP_WRITEFULL: - rbd_osd_write_callback(obj_request); - break; - case CEPH_OSD_OP_STAT: - rbd_osd_stat_callback(obj_request); - break; - case CEPH_OSD_OP_DELETE: - case CEPH_OSD_OP_TRUNCATE: - case CEPH_OSD_OP_ZERO: - rbd_osd_discard_callback(obj_request); - break; - case CEPH_OSD_OP_CALL: - rbd_osd_call_callback(obj_request); - break; - default: - rbd_warn(NULL, "unexpected OSD op: object_no %016llx opcode %d", - obj_request->object_no, opcode); - break; - } + obj_req->result = osd_req->r_result < 0 ? osd_req->r_result : 0; + if (!obj_req->result && !rbd_img_is_write(obj_req->img_request)) + obj_req->xferred = osd_req->r_result; + else + /* + * Writes aren't allowed to return a data payload. In some + * guarded write cases (e.g. stat + zero on an empty object) + * a stat response makes it through, but we don't care. + */ + obj_req->xferred = 0; - if (obj_request_done_test(obj_request)) - rbd_obj_request_complete(obj_request); + rbd_obj_handle_request(obj_req); } static void rbd_osd_req_format_read(struct rbd_obj_request *obj_request) @@ -1806,12 +1847,6 @@ err_req: return NULL; } -/* - * Create an osd request. A read request has one osd op (read). - * A write request has either one (watch) or two (hint+write) osd ops. - * (All rbd data writes are prefixed with an allocation hint op, but - * technically osd watch is a write request, hence this distinction.) - */ static struct ceph_osd_request *rbd_osd_req_create( struct rbd_device *rbd_dev, enum obj_operation_type op_type, @@ -1831,8 +1866,6 @@ static struct ceph_osd_request *rbd_osd_req_create( snapc = img_request->snapc; } - rbd_assert(num_ops == 1 || ((op_type == OBJ_OP_WRITE) && num_ops == 2)); - return __rbd_osd_req_create(rbd_dev, snapc, num_ops, (op_type == OBJ_OP_WRITE || op_type == OBJ_OP_DISCARD) ? CEPH_OSD_FLAG_WRITE : CEPH_OSD_FLAG_READ, obj_request); @@ -2251,6 +2284,211 @@ static void rbd_img_obj_request_fill(struct rbd_obj_request *obj_request, rbd_osd_req_format_read(obj_request); } +static void rbd_osd_req_setup_data(struct rbd_obj_request *obj_req, u32 which) +{ + switch (obj_req->type) { + case OBJ_REQUEST_BIO: + osd_req_op_extent_osd_data_bio(obj_req->osd_req, which, + &obj_req->bio_pos, + obj_req->length); + break; + case OBJ_REQUEST_BVECS: + rbd_assert(obj_req->bvec_pos.iter.bi_size == + obj_req->length); + osd_req_op_extent_osd_data_bvec_pos(obj_req->osd_req, which, + &obj_req->bvec_pos); + break; + default: + rbd_assert(0); + } +} + +static int rbd_obj_setup_read(struct rbd_obj_request *obj_req) +{ + struct rbd_device *rbd_dev = obj_req->img_request->rbd_dev; + + obj_req->osd_req = rbd_osd_req_create(rbd_dev, OBJ_OP_READ, 1, obj_req); + if (!obj_req->osd_req) + return -ENOMEM; + + osd_req_op_extent_init(obj_req->osd_req, 0, CEPH_OSD_OP_READ, + obj_req->offset, obj_req->length, 0, 0); + rbd_osd_req_setup_data(obj_req, 0); + + rbd_osd_req_format_read(obj_req); + return 0; +} + +static int __rbd_obj_setup_stat(struct rbd_obj_request *obj_req, + unsigned int which) +{ + struct page **pages; + + /* + * The response data for a STAT call consists of: + * le64 length; + * struct { + * le32 tv_sec; + * le32 tv_nsec; + * } mtime; + */ + pages = ceph_alloc_page_vector(1, GFP_NOIO); + if (IS_ERR(pages)) + return PTR_ERR(pages); + + osd_req_op_init(obj_req->osd_req, which, CEPH_OSD_OP_STAT, 0); + osd_req_op_raw_data_in_pages(obj_req->osd_req, which, pages, + 8 + sizeof(struct ceph_timespec), + 0, false, true); + return 0; +} + +static void __rbd_obj_setup_write(struct rbd_obj_request *obj_req, + unsigned int which) +{ + struct rbd_device *rbd_dev = obj_req->img_request->rbd_dev; + u16 opcode; + + osd_req_op_alloc_hint_init(obj_req->osd_req, which++, + rbd_dev->layout.object_size, + rbd_dev->layout.object_size); + + if (rbd_obj_is_entire(obj_req)) + opcode = CEPH_OSD_OP_WRITEFULL; + else + opcode = CEPH_OSD_OP_WRITE; + + osd_req_op_extent_init(obj_req->osd_req, which, opcode, + obj_req->offset, obj_req->length, 0, 0); + rbd_osd_req_setup_data(obj_req, which++); + + rbd_assert(which == obj_req->osd_req->r_num_ops); + rbd_osd_req_format_write(obj_req); +} + +static int rbd_obj_setup_write(struct rbd_obj_request *obj_req) +{ + struct rbd_device *rbd_dev = obj_req->img_request->rbd_dev; + unsigned int num_osd_ops, which = 0; + int ret; + + if (obj_request_overlaps_parent(obj_req)) { + obj_req->write_state = RBD_OBJ_WRITE_GUARD; + num_osd_ops = 3; /* stat + setallochint + write/writefull */ + } else { + obj_req->write_state = RBD_OBJ_WRITE_FLAT; + num_osd_ops = 2; /* setallochint + write/writefull */ + } + + obj_req->osd_req = rbd_osd_req_create(rbd_dev, OBJ_OP_WRITE, + num_osd_ops, obj_req); + if (!obj_req->osd_req) + return -ENOMEM; + + if (obj_request_overlaps_parent(obj_req)) { + ret = __rbd_obj_setup_stat(obj_req, which++); + if (ret) + return ret; + } + + __rbd_obj_setup_write(obj_req, which); + return 0; +} + +static void __rbd_obj_setup_discard(struct rbd_obj_request *obj_req, + unsigned int which) +{ + u16 opcode; + + if (rbd_obj_is_entire(obj_req)) { + if (obj_request_overlaps_parent(obj_req)) { + opcode = CEPH_OSD_OP_TRUNCATE; + } else { + osd_req_op_init(obj_req->osd_req, which++, + CEPH_OSD_OP_DELETE, 0); + opcode = 0; + } + } else if (rbd_obj_is_tail(obj_req)) { + opcode = CEPH_OSD_OP_TRUNCATE; + } else { + opcode = CEPH_OSD_OP_ZERO; + } + + if (opcode) + osd_req_op_extent_init(obj_req->osd_req, which++, opcode, + obj_req->offset, obj_req->length, + 0, 0); + + rbd_assert(which == obj_req->osd_req->r_num_ops); + rbd_osd_req_format_write(obj_req); +} + +static int rbd_obj_setup_discard(struct rbd_obj_request *obj_req) +{ + struct rbd_device *rbd_dev = obj_req->img_request->rbd_dev; + unsigned int num_osd_ops, which = 0; + int ret; + + if (rbd_obj_is_entire(obj_req)) { + obj_req->write_state = RBD_OBJ_WRITE_FLAT; + num_osd_ops = 1; /* truncate/delete */ + } else { + if (obj_request_overlaps_parent(obj_req)) { + obj_req->write_state = RBD_OBJ_WRITE_GUARD; + num_osd_ops = 2; /* stat + truncate/zero */ + } else { + obj_req->write_state = RBD_OBJ_WRITE_FLAT; + num_osd_ops = 1; /* truncate/zero */ + } + } + + obj_req->osd_req = rbd_osd_req_create(rbd_dev, OBJ_OP_DISCARD, + num_osd_ops, obj_req); + if (!obj_req->osd_req) + return -ENOMEM; + + if (!rbd_obj_is_entire(obj_req) && + obj_request_overlaps_parent(obj_req)) { + ret = __rbd_obj_setup_stat(obj_req, which++); + if (ret) + return ret; + } + + __rbd_obj_setup_discard(obj_req, which); + return 0; +} + +/* + * For each object request in @img_req, allocate an OSD request, add + * individual OSD ops and prepare them for submission. The number of + * OSD ops depends on op_type and the overlap point (if any). + */ +static int __rbd_img_fill_request(struct rbd_img_request *img_req) +{ + struct rbd_obj_request *obj_req; + int ret; + + for_each_obj_request(img_req, obj_req) { + switch (rbd_img_request_op_type(img_req)) { + case OBJ_OP_READ: + ret = rbd_obj_setup_read(obj_req); + break; + case OBJ_OP_WRITE: + ret = rbd_obj_setup_write(obj_req); + break; + case OBJ_OP_DISCARD: + ret = rbd_obj_setup_discard(obj_req); + break; + default: + rbd_assert(0); + } + if (ret) + return ret; + } + + return 0; +} + /* * Split up an image request into one or more object requests, each * to a different object. The "type" parameter indicates whether @@ -2268,7 +2506,6 @@ static int rbd_img_request_fill(struct rbd_img_request *img_request, struct rbd_obj_request *next_obj_request; struct ceph_bio_iter bio_it; struct ceph_bvec_iter bvec_it; - enum obj_operation_type op_type; u64 img_offset; u64 resid; @@ -2278,7 +2515,6 @@ static int rbd_img_request_fill(struct rbd_img_request *img_request, img_offset = img_request->offset; resid = img_request->length; rbd_assert(resid > 0); - op_type = rbd_img_request_op_type(img_request); if (type == OBJ_REQUEST_BIO) { bio_it = *(struct ceph_bio_iter *)data_desc; @@ -2289,7 +2525,6 @@ static int rbd_img_request_fill(struct rbd_img_request *img_request, } while (resid) { - struct ceph_osd_request *osd_req; u64 object_no = img_offset >> rbd_dev->header.obj_order; u64 offset = rbd_segment_offset(rbd_dev, img_offset); u64 length = rbd_segment_length(rbd_dev, img_offset, resid); @@ -2317,23 +2552,14 @@ static int rbd_img_request_fill(struct rbd_img_request *img_request, ceph_bvec_iter_advance(&bvec_it, length); } - osd_req = rbd_osd_req_create(rbd_dev, op_type, - (op_type == OBJ_OP_WRITE) ? 2 : 1, - obj_request); - if (!osd_req) - goto out_unwind; - - obj_request->osd_req = osd_req; obj_request->callback = rbd_img_obj_callback; obj_request->img_offset = img_offset; - rbd_img_obj_request_fill(obj_request, osd_req, op_type, 0); - img_offset += length; resid -= length; } - return 0; + return __rbd_img_fill_request(img_request); out_unwind: for_each_obj_request_safe(img_request, obj_request, next_obj_request) @@ -2712,16 +2938,171 @@ static int rbd_img_request_submit(struct rbd_img_request *img_request) rbd_img_request_get(img_request); for_each_obj_request_safe(img_request, obj_request, next_obj_request) { - ret = rbd_img_obj_request_submit(obj_request); - if (ret) - goto out_put_ireq; + rbd_obj_request_submit(obj_request); } -out_put_ireq: rbd_img_request_put(img_request); return ret; } +static void rbd_img_end_child_request(struct rbd_img_request *img_req); + +static int rbd_obj_read_from_parent(struct rbd_obj_request *obj_req, + u64 img_offset, u32 bytes) +{ + struct rbd_img_request *img_req = obj_req->img_request; + struct rbd_img_request *child_img_req; + int ret; + + child_img_req = rbd_parent_request_create(obj_req, img_offset, bytes); + if (!child_img_req) + return -ENOMEM; + + child_img_req->callback = rbd_img_end_child_request; + + if (!rbd_img_is_write(img_req)) { + switch (obj_req->type) { + case OBJ_REQUEST_BIO: + ret = rbd_img_request_fill(child_img_req, + OBJ_REQUEST_BIO, + &obj_req->bio_pos); + break; + case OBJ_REQUEST_BVECS: + ret = rbd_img_request_fill(child_img_req, + OBJ_REQUEST_BVECS, + &obj_req->bvec_pos); + break; + default: + rbd_assert(0); + } + } else { + struct ceph_bvec_iter it = { + .bvecs = obj_req->copyup_bvecs, + .iter = { .bi_size = bytes }, + }; + + ret = rbd_img_request_fill(child_img_req, OBJ_REQUEST_BVECS, + &it); + } + if (ret) { + rbd_img_request_put(child_img_req); + return ret; + } + + rbd_img_request_submit(child_img_req); + return 0; +} + +static bool rbd_obj_handle_read(struct rbd_obj_request *obj_req) +{ + struct rbd_device *rbd_dev = obj_req->img_request->rbd_dev; + int ret; + + if (obj_req->result == -ENOENT && + obj_req->img_offset < rbd_dev->parent_overlap && + !obj_req->tried_parent) { + u64 obj_overlap = min(obj_req->length, + rbd_dev->parent_overlap - obj_req->img_offset); + + obj_req->tried_parent = true; + ret = rbd_obj_read_from_parent(obj_req, obj_req->img_offset, + obj_overlap); + if (ret) { + obj_req->result = ret; + return true; + } + return false; + } + + /* + * -ENOENT means a hole in the image -- zero-fill the entire + * length of the request. A short read also implies zero-fill + * to the end of the request. In both cases we update xferred + * count to indicate the whole request was satisfied. + */ + if (obj_req->result == -ENOENT || + (!obj_req->result && obj_req->xferred < obj_req->length)) { + rbd_assert(!obj_req->xferred || !obj_req->result); + rbd_obj_zero_range(obj_req, obj_req->xferred, + obj_req->length - obj_req->xferred); + obj_req->result = 0; + obj_req->xferred = obj_req->length; + } + + return true; +} + +/* + * copyup_bvecs pages are never highmem pages + */ +static bool is_zero_bvecs(struct bio_vec *bvecs, u32 bytes) +{ + struct ceph_bvec_iter it = { + .bvecs = bvecs, + .iter = { .bi_size = bytes }, + }; + + ceph_bvec_iter_advance_step(&it, bytes, ({ + if (memchr_inv(page_address(bv.bv_page) + bv.bv_offset, 0, + bv.bv_len)) + return false; + })); + return true; +} + +static int rbd_obj_issue_copyup(struct rbd_obj_request *obj_req, u32 bytes) +{ + struct rbd_device *rbd_dev = obj_req->img_request->rbd_dev; + unsigned int num_osd_ops = obj_req->osd_req->r_num_ops; + + dout("%s obj_req %p bytes %u\n", __func__, obj_req, bytes); + rbd_assert(obj_req->osd_req->r_ops[0].op == CEPH_OSD_OP_STAT); + rbd_osd_req_destroy(obj_req->osd_req); + + /* + * Create a copyup request with the same number of OSD ops as + * the original request. The original request was stat + op(s), + * the new copyup request will be copyup + the same op(s). + */ + obj_req->osd_req = rbd_osd_req_create(rbd_dev, + rbd_img_request_op_type(obj_req->img_request), + num_osd_ops, obj_req); + if (!obj_req->osd_req) + return -ENOMEM; + + /* + * Only send non-zero copyup data to save some I/O and network + * bandwidth -- zero copyup data is equivalent to the object not + * existing. + */ + if (is_zero_bvecs(obj_req->copyup_bvecs, bytes)) { + dout("%s obj_req %p detected zeroes\n", __func__, obj_req); + bytes = 0; + } + + osd_req_op_cls_init(obj_req->osd_req, 0, CEPH_OSD_OP_CALL, "rbd", + "copyup"); + osd_req_op_cls_request_data_bvecs(obj_req->osd_req, 0, + obj_req->copyup_bvecs, bytes); + + switch (rbd_img_request_op_type(obj_req->img_request)) { + case OBJ_OP_WRITE: + __rbd_obj_setup_write(obj_req, 1); + break; + case OBJ_OP_DISCARD: + rbd_assert(!rbd_obj_is_entire(obj_req)); + __rbd_obj_setup_discard(obj_req, 1); + break; + default: + rbd_assert(0); + } + + rbd_obj_request_submit(obj_req); + /* FIXME: in lieu of rbd_img_obj_callback() */ + rbd_img_request_put(obj_req->img_request); + return 0; +} + static int setup_copyup_bvecs(struct rbd_obj_request *obj_req, u64 obj_overlap) { u32 i; @@ -2850,6 +3231,149 @@ out_err: obj_request_done_set(obj_request); } +static int rbd_obj_handle_write_guard(struct rbd_obj_request *obj_req) +{ + struct rbd_device *rbd_dev = obj_req->img_request->rbd_dev; + u64 img_offset; + u64 obj_overlap; + int ret; + + if (!obj_request_overlaps_parent(obj_req)) { + /* + * The overlap has become 0 (most likely because the + * image has been flattened). Use rbd_obj_issue_copyup() + * to re-submit the original write request -- the copyup + * operation itself will be a no-op, since someone must + * have populated the child object while we weren't + * looking. Move to WRITE_FLAT state as we'll be done + * with the operation once the null copyup completes. + */ + obj_req->write_state = RBD_OBJ_WRITE_FLAT; + return rbd_obj_issue_copyup(obj_req, 0); + } + + /* + * Determine the byte range covered by the object in the + * child image to which the original request was to be sent. + */ + img_offset = obj_req->img_offset - obj_req->offset; + obj_overlap = rbd_dev->layout.object_size; + + /* + * There is no defined parent data beyond the parent + * overlap, so limit what we read at that boundary if + * necessary. + */ + if (img_offset + obj_overlap > rbd_dev->parent_overlap) { + rbd_assert(img_offset < rbd_dev->parent_overlap); + obj_overlap = rbd_dev->parent_overlap - img_offset; + } + + ret = setup_copyup_bvecs(obj_req, obj_overlap); + if (ret) + return ret; + + obj_req->write_state = RBD_OBJ_WRITE_COPYUP; + return rbd_obj_read_from_parent(obj_req, img_offset, obj_overlap); +} + +static bool rbd_obj_handle_write(struct rbd_obj_request *obj_req) +{ + int ret; + +again: + switch (obj_req->write_state) { + case RBD_OBJ_WRITE_GUARD: + rbd_assert(!obj_req->xferred); + if (obj_req->result == -ENOENT) { + /* + * The target object doesn't exist. Read the data for + * the entire target object up to the overlap point (if + * any) from the parent, so we can use it for a copyup. + */ + ret = rbd_obj_handle_write_guard(obj_req); + if (ret) { + obj_req->result = ret; + return true; + } + return false; + } + /* fall through */ + case RBD_OBJ_WRITE_FLAT: + if (!obj_req->result) + /* + * There is no such thing as a successful short + * write -- indicate the whole request was satisfied. + */ + obj_req->xferred = obj_req->length; + return true; + case RBD_OBJ_WRITE_COPYUP: + obj_req->write_state = RBD_OBJ_WRITE_GUARD; + if (obj_req->result) + goto again; + + rbd_assert(obj_req->xferred); + ret = rbd_obj_issue_copyup(obj_req, obj_req->xferred); + if (ret) { + obj_req->result = ret; + return true; + } + return false; + default: + rbd_assert(0); + } +} + +/* + * Returns true if @obj_req is completed, or false otherwise. + */ +static bool __rbd_obj_handle_request(struct rbd_obj_request *obj_req) +{ + switch (rbd_img_request_op_type(obj_req->img_request)) { + case OBJ_OP_READ: + return rbd_obj_handle_read(obj_req); + case OBJ_OP_WRITE: + return rbd_obj_handle_write(obj_req); + case OBJ_OP_DISCARD: + if (rbd_obj_handle_write(obj_req)) { + /* + * Hide -ENOENT from delete/truncate/zero -- discarding + * a non-existent object is not a problem. + */ + if (obj_req->result == -ENOENT) { + obj_req->result = 0; + obj_req->xferred = obj_req->length; + } + return true; + } + return false; + default: + rbd_assert(0); + } +} + +static void rbd_img_end_child_request(struct rbd_img_request *img_req) +{ + struct rbd_obj_request *obj_req = img_req->obj_request; + + rbd_assert(test_bit(IMG_REQ_CHILD, &img_req->flags)); + + obj_req->result = img_req->result; + obj_req->xferred = img_req->xferred; + rbd_img_request_put(img_req); + + rbd_obj_handle_request(obj_req); +} + +static void rbd_obj_handle_request(struct rbd_obj_request *obj_req) +{ + if (!__rbd_obj_handle_request(obj_req)) + return; + + obj_request_done_set(obj_req); + rbd_obj_request_complete(obj_req); +} + static const struct rbd_client_id rbd_empty_cid; static bool rbd_cid_equal(const struct rbd_client_id *lhs, -- cgit v1.2.3-59-g8ed1b From 51c3509e5e167cf0fdc82c81f4d85da46b1ee1ee Mon Sep 17 00:00:00 2001 From: Ilya Dryomov Date: Mon, 29 Jan 2018 14:04:08 +0100 Subject: rbd: remove old request handling code Signed-off-by: Ilya Dryomov --- drivers/block/rbd.c | 734 +--------------------------------------------------- 1 file changed, 4 insertions(+), 730 deletions(-) diff --git a/drivers/block/rbd.c b/drivers/block/rbd.c index 1bffad122dc2..e7e99e7fd874 100644 --- a/drivers/block/rbd.c +++ b/drivers/block/rbd.c @@ -231,8 +231,6 @@ enum obj_operation_type { enum obj_req_flags { OBJ_REQ_DONE, /* completion flag: not done = 0, done = 1 */ OBJ_REQ_IMG_DATA, /* object usage: standalone = 0, image = 1 */ - OBJ_REQ_KNOWN, /* EXISTS flag valid: no = 0, yes = 1 */ - OBJ_REQ_EXISTS, /* target exists: no = 0, yes = 1 */ }; /* @@ -271,27 +269,15 @@ struct rbd_obj_request { * An object request associated with an image will have its * img_data flag set; a standalone object request will not. * - * A standalone object request will have which == BAD_WHICH - * and a null obj_request pointer. - * - * An object request initiated in support of a layered image - * object (to check for its existence before a write) will - * have which == BAD_WHICH and a non-null obj_request pointer. - * * Finally, an object request for rbd image data will have * which != BAD_WHICH, and will have a non-null img_request * pointer. The value of which will be in the range * 0..(img_request->obj_request_count-1). */ - union { - struct rbd_obj_request *obj_request; /* STAT op */ - struct { - struct rbd_img_request *img_request; - u64 img_offset; - /* links for img_request->obj_requests list */ - struct list_head links; - }; - }; + struct rbd_img_request *img_request; + u64 img_offset; + /* links for img_request->obj_requests list */ + struct list_head links; u32 which; /* posn image request list */ enum obj_request_type type; @@ -480,8 +466,6 @@ static bool single_major = true; module_param(single_major, bool, S_IRUGO); MODULE_PARM_DESC(single_major, "Use a single major number for all rbd devices (default: true)"); -static int rbd_img_request_submit(struct rbd_img_request *img_request); - static ssize_t rbd_add(struct bus_type *bus, const char *buf, size_t count); static ssize_t rbd_remove(struct bus_type *bus, const char *buf, @@ -610,9 +594,6 @@ void rbd_warn(struct rbd_device *rbd_dev, const char *fmt, ...) # define rbd_assert(expr) ((void) 0) #endif /* !RBD_DEBUG */ -static void rbd_osd_copyup_callback(struct rbd_obj_request *obj_request); -static int rbd_img_obj_request_submit(struct rbd_obj_request *obj_request); -static void rbd_img_parent_read(struct rbd_obj_request *obj_request); static void rbd_dev_remove_parent(struct rbd_device *rbd_dev); static int rbd_dev_refresh(struct rbd_device *rbd_dev); @@ -1369,37 +1350,6 @@ static bool obj_request_done_test(struct rbd_obj_request *obj_request) return test_bit(OBJ_REQ_DONE, &obj_request->flags) != 0; } -/* - * This sets the KNOWN flag after (possibly) setting the EXISTS - * flag. The latter is set based on the "exists" value provided. - * - * Note that for our purposes once an object exists it never goes - * away again. It's possible that the response from two existence - * checks are separated by the creation of the target object, and - * the first ("doesn't exist") response arrives *after* the second - * ("does exist"). In that case we ignore the second one. - */ -static void obj_request_existence_set(struct rbd_obj_request *obj_request, - bool exists) -{ - if (exists) - set_bit(OBJ_REQ_EXISTS, &obj_request->flags); - set_bit(OBJ_REQ_KNOWN, &obj_request->flags); - smp_mb(); -} - -static bool obj_request_known_test(struct rbd_obj_request *obj_request) -{ - smp_mb(); - return test_bit(OBJ_REQ_KNOWN, &obj_request->flags) != 0; -} - -static bool obj_request_exists_test(struct rbd_obj_request *obj_request) -{ - smp_mb(); - return test_bit(OBJ_REQ_EXISTS, &obj_request->flags) != 0; -} - static bool obj_request_overlaps_parent(struct rbd_obj_request *obj_request) { struct rbd_device *rbd_dev = obj_request->img_request->rbd_dev; @@ -1643,42 +1593,6 @@ static bool rbd_img_is_write(struct rbd_img_request *img_req) } } -static void -rbd_img_obj_request_read_callback(struct rbd_obj_request *obj_request) -{ - u64 xferred = obj_request->xferred; - u64 length = obj_request->length; - - dout("%s: obj %p img %p result %d %llu/%llu\n", __func__, - obj_request, obj_request->img_request, obj_request->result, - xferred, length); - /* - * ENOENT means a hole in the image. We zero-fill the entire - * length of the request. A short read also implies zero-fill - * to the end of the request. An error requires the whole - * length of the request to be reported finished with an error - * to the block layer. In each case we update the xferred - * count to indicate the whole request was satisfied. - */ - rbd_assert(obj_request->type != OBJ_REQUEST_NODATA); - if (obj_request->result == -ENOENT) { - if (obj_request->type == OBJ_REQUEST_BIO) - zero_bios(&obj_request->bio_pos, 0, length); - else - zero_bvecs(&obj_request->bvec_pos, 0, length); - obj_request->result = 0; - } else if (xferred < length && !obj_request->result) { - if (obj_request->type == OBJ_REQUEST_BIO) - zero_bios(&obj_request->bio_pos, xferred, - length - xferred); - else - zero_bvecs(&obj_request->bvec_pos, xferred, - length - xferred); - } - obj_request->xferred = length; - obj_request_done_set(obj_request); -} - static void rbd_obj_request_complete(struct rbd_obj_request *obj_request) { dout("%s: obj %p cb %p\n", __func__, obj_request, @@ -1686,93 +1600,6 @@ static void rbd_obj_request_complete(struct rbd_obj_request *obj_request) obj_request->callback(obj_request); } -static void rbd_obj_request_error(struct rbd_obj_request *obj_request, int err) -{ - obj_request->result = err; - obj_request->xferred = 0; - /* - * kludge - mirror rbd_obj_request_submit() to match a put in - * rbd_img_obj_callback() - */ - if (obj_request_img_data_test(obj_request)) { - WARN_ON(obj_request->callback != rbd_img_obj_callback); - rbd_img_request_get(obj_request->img_request); - } - obj_request_done_set(obj_request); - rbd_obj_request_complete(obj_request); -} - -static void rbd_osd_read_callback(struct rbd_obj_request *obj_request) -{ - struct rbd_img_request *img_request = NULL; - struct rbd_device *rbd_dev = NULL; - bool layered = false; - - if (obj_request_img_data_test(obj_request)) { - img_request = obj_request->img_request; - layered = img_request && img_request_layered_test(img_request); - rbd_dev = img_request->rbd_dev; - } - - dout("%s: obj %p img %p result %d %llu/%llu\n", __func__, - obj_request, img_request, obj_request->result, - obj_request->xferred, obj_request->length); - if (layered && obj_request->result == -ENOENT && - obj_request->img_offset < rbd_dev->parent_overlap) - rbd_img_parent_read(obj_request); - else if (img_request) - rbd_img_obj_request_read_callback(obj_request); - else - obj_request_done_set(obj_request); -} - -static void rbd_osd_write_callback(struct rbd_obj_request *obj_request) -{ - dout("%s: obj %p result %d %llu\n", __func__, obj_request, - obj_request->result, obj_request->length); - /* - * There is no such thing as a successful short write. Set - * it to our originally-requested length. - */ - obj_request->xferred = obj_request->length; - obj_request_done_set(obj_request); -} - -static void rbd_osd_discard_callback(struct rbd_obj_request *obj_request) -{ - dout("%s: obj %p result %d %llu\n", __func__, obj_request, - obj_request->result, obj_request->length); - /* - * There is no such thing as a successful short discard. Set - * it to our originally-requested length. - */ - obj_request->xferred = obj_request->length; - /* discarding a non-existent object is not a problem */ - if (obj_request->result == -ENOENT) - obj_request->result = 0; - obj_request_done_set(obj_request); -} - -/* - * For a simple stat call there's nothing to do. We'll do more if - * this is part of a write sequence for a layered image. - */ -static void rbd_osd_stat_callback(struct rbd_obj_request *obj_request) -{ - dout("%s: obj %p\n", __func__, obj_request); - obj_request_done_set(obj_request); -} - -static void rbd_osd_call_callback(struct rbd_obj_request *obj_request) -{ - dout("%s: obj %p\n", __func__, obj_request); - - if (obj_request_img_data_test(obj_request)) - rbd_osd_copyup_callback(obj_request); - else - obj_request_done_set(obj_request); -} - static void rbd_obj_handle_request(struct rbd_obj_request *obj_req); static void rbd_osd_req_callback(struct ceph_osd_request *osd_req) @@ -1871,32 +1698,6 @@ static struct ceph_osd_request *rbd_osd_req_create( CEPH_OSD_FLAG_WRITE : CEPH_OSD_FLAG_READ, obj_request); } -/* - * Create a copyup osd request based on the information in the object - * request supplied. A copyup request has two or three osd ops, a - * copyup method call, potentially a hint op, and a write or truncate - * or zero op. - */ -static struct ceph_osd_request * -rbd_osd_req_create_copyup(struct rbd_obj_request *obj_request) -{ - struct rbd_img_request *img_request; - int num_osd_ops = 3; - - rbd_assert(obj_request_img_data_test(obj_request)); - img_request = obj_request->img_request; - rbd_assert(img_request); - rbd_assert(img_request_write_test(img_request) || - img_request_discard_test(img_request)); - - if (img_request_discard_test(img_request)) - num_osd_ops = 2; - - return __rbd_osd_req_create(img_request->rbd_dev, - img_request->snapc, num_osd_ops, - CEPH_OSD_FLAG_WRITE, obj_request); -} - static void rbd_osd_req_destroy(struct ceph_osd_request *osd_req) { ceph_osdc_put_request(osd_req); @@ -2217,73 +2018,6 @@ out: rbd_img_request_complete(img_request); } -/* - * Add individual osd ops to the given ceph_osd_request and prepare - * them for submission. num_ops is the current number of - * osd operations already to the object request. - */ -static void rbd_img_obj_request_fill(struct rbd_obj_request *obj_request, - struct ceph_osd_request *osd_request, - enum obj_operation_type op_type, - unsigned int num_ops) -{ - struct rbd_img_request *img_request = obj_request->img_request; - struct rbd_device *rbd_dev = img_request->rbd_dev; - u64 object_size = rbd_obj_bytes(&rbd_dev->header); - u64 offset = obj_request->offset; - u64 length = obj_request->length; - u64 img_end; - u16 opcode; - - if (op_type == OBJ_OP_DISCARD) { - if (!offset && length == object_size && - (!img_request_layered_test(img_request) || - !obj_request_overlaps_parent(obj_request))) { - opcode = CEPH_OSD_OP_DELETE; - } else if ((offset + length == object_size)) { - opcode = CEPH_OSD_OP_TRUNCATE; - } else { - down_read(&rbd_dev->header_rwsem); - img_end = rbd_dev->header.image_size; - up_read(&rbd_dev->header_rwsem); - - if (obj_request->img_offset + length == img_end) - opcode = CEPH_OSD_OP_TRUNCATE; - else - opcode = CEPH_OSD_OP_ZERO; - } - } else if (op_type == OBJ_OP_WRITE) { - if (!offset && length == object_size) - opcode = CEPH_OSD_OP_WRITEFULL; - else - opcode = CEPH_OSD_OP_WRITE; - osd_req_op_alloc_hint_init(osd_request, num_ops, - object_size, object_size); - num_ops++; - } else { - opcode = CEPH_OSD_OP_READ; - } - - if (opcode == CEPH_OSD_OP_DELETE) - osd_req_op_init(osd_request, num_ops, opcode, 0); - else - osd_req_op_extent_init(osd_request, num_ops, opcode, - offset, length, 0, 0); - - if (obj_request->type == OBJ_REQUEST_BIO) - osd_req_op_extent_osd_data_bio(osd_request, num_ops, - &obj_request->bio_pos, length); - else if (obj_request->type == OBJ_REQUEST_BVECS) - osd_req_op_extent_osd_data_bvec_pos(osd_request, num_ops, - &obj_request->bvec_pos); - - /* Discards are also writes */ - if (op_type == OBJ_OP_WRITE || op_type == OBJ_OP_DISCARD) - rbd_osd_req_format_write(obj_request); - else - rbd_osd_req_format_read(obj_request); -} - static void rbd_osd_req_setup_data(struct rbd_obj_request *obj_req, u32 which) { switch (obj_req->type) { @@ -2568,366 +2302,6 @@ out_unwind: return -ENOMEM; } -static void -rbd_osd_copyup_callback(struct rbd_obj_request *obj_request) -{ - struct rbd_img_request *img_request; - struct rbd_device *rbd_dev; - - dout("%s: obj %p\n", __func__, obj_request); - - rbd_assert(obj_request->type == OBJ_REQUEST_BIO || - obj_request->type == OBJ_REQUEST_NODATA); - rbd_assert(obj_request_img_data_test(obj_request)); - img_request = obj_request->img_request; - rbd_assert(img_request); - - rbd_dev = img_request->rbd_dev; - rbd_assert(rbd_dev); - - /* - * We want the transfer count to reflect the size of the - * original write request. There is no such thing as a - * successful short write, so if the request was successful - * we can just set it to the originally-requested length. - */ - if (!obj_request->result) - obj_request->xferred = obj_request->length; - - obj_request_done_set(obj_request); -} - -static void -rbd_img_obj_parent_read_full_callback(struct rbd_img_request *img_request) -{ - struct rbd_obj_request *orig_request; - struct ceph_osd_request *osd_req; - struct rbd_device *rbd_dev; - enum obj_operation_type op_type; - int img_result; - u64 parent_length; - - rbd_assert(img_request_child_test(img_request)); - - /* First get what we need from the image request */ - - orig_request = img_request->obj_request; - rbd_assert(orig_request != NULL); - rbd_assert(obj_request_type_valid(orig_request->type)); - img_result = img_request->result; - parent_length = img_request->length; - rbd_assert(img_result || parent_length == img_request->xferred); - rbd_img_request_put(img_request); - - rbd_assert(orig_request->img_request); - rbd_dev = orig_request->img_request->rbd_dev; - rbd_assert(rbd_dev); - - /* - * If the overlap has become 0 (most likely because the - * image has been flattened) we need to free the pages - * and re-submit the original write request. - */ - if (!rbd_dev->parent_overlap) { - rbd_obj_request_submit(orig_request); - return; - } - - if (img_result) - goto out_err; - - /* - * The original osd request is of no use to use any more. - * We need a new one that can hold the three ops in a copyup - * request. Allocate the new copyup osd request for the - * original request, and release the old one. - */ - img_result = -ENOMEM; - osd_req = rbd_osd_req_create_copyup(orig_request); - if (!osd_req) - goto out_err; - rbd_osd_req_destroy(orig_request->osd_req); - orig_request->osd_req = osd_req; - - /* Initialize the copyup op */ - - osd_req_op_cls_init(osd_req, 0, CEPH_OSD_OP_CALL, "rbd", "copyup"); - osd_req_op_cls_request_data_bvecs(osd_req, 0, orig_request->copyup_bvecs, - parent_length); - - /* Add the other op(s) */ - - op_type = rbd_img_request_op_type(orig_request->img_request); - rbd_img_obj_request_fill(orig_request, osd_req, op_type, 1); - - /* All set, send it off. */ - - rbd_obj_request_submit(orig_request); - return; - -out_err: - rbd_obj_request_error(orig_request, img_result); -} - -static int setup_copyup_bvecs(struct rbd_obj_request *obj_req, u64 obj_overlap); - -/* - * Read from the parent image the range of data that covers the - * entire target of the given object request. This is used for - * satisfying a layered image write request when the target of an - * object request from the image request does not exist. - * - * A page array big enough to hold the returned data is allocated - * and supplied to rbd_img_request_fill() as the "data descriptor." - * When the read completes, this page array will be transferred to - * the original object request for the copyup operation. - * - * If an error occurs, it is recorded as the result of the original - * object request in rbd_img_obj_exists_callback(). - */ -static int rbd_img_obj_parent_read_full(struct rbd_obj_request *obj_request) -{ - struct rbd_device *rbd_dev = obj_request->img_request->rbd_dev; - struct rbd_img_request *parent_request = NULL; - struct ceph_bvec_iter bvec_it = { 0 }; - u64 img_offset; - u64 length; - int result; - - rbd_assert(rbd_dev->parent != NULL); - - /* - * Determine the byte range covered by the object in the - * child image to which the original request was to be sent. - */ - img_offset = obj_request->img_offset - obj_request->offset; - length = rbd_obj_bytes(&rbd_dev->header); - - /* - * There is no defined parent data beyond the parent - * overlap, so limit what we read at that boundary if - * necessary. - */ - if (img_offset + length > rbd_dev->parent_overlap) { - rbd_assert(img_offset < rbd_dev->parent_overlap); - length = rbd_dev->parent_overlap - img_offset; - } - - /* - * Allocate a page array big enough to receive the data read - * from the parent. - */ - result = setup_copyup_bvecs(obj_request, length); - if (result) - goto out_err; - - result = -ENOMEM; - parent_request = rbd_parent_request_create(obj_request, - img_offset, length); - if (!parent_request) - goto out_err; - - bvec_it.bvecs = obj_request->copyup_bvecs; - bvec_it.iter.bi_size = length; - result = rbd_img_request_fill(parent_request, OBJ_REQUEST_BVECS, - &bvec_it); - if (result) - goto out_err; - - parent_request->callback = rbd_img_obj_parent_read_full_callback; - - result = rbd_img_request_submit(parent_request); - if (!result) - return 0; - -out_err: - if (parent_request) - rbd_img_request_put(parent_request); - return result; -} - -static void rbd_img_obj_exists_callback(struct rbd_obj_request *obj_request) -{ - struct rbd_obj_request *orig_request; - struct rbd_device *rbd_dev; - int result; - - rbd_assert(!obj_request_img_data_test(obj_request)); - - /* - * All we need from the object request is the original - * request and the result of the STAT op. Grab those, then - * we're done with the request. - */ - orig_request = obj_request->obj_request; - obj_request->obj_request = NULL; - rbd_obj_request_put(orig_request); - rbd_assert(orig_request); - rbd_assert(orig_request->img_request); - - result = obj_request->result; - obj_request->result = 0; - - dout("%s: obj %p for obj %p result %d %llu/%llu\n", __func__, - obj_request, orig_request, result, - obj_request->xferred, obj_request->length); - rbd_obj_request_put(obj_request); - - /* - * If the overlap has become 0 (most likely because the - * image has been flattened) we need to re-submit the - * original request. - */ - rbd_dev = orig_request->img_request->rbd_dev; - if (!rbd_dev->parent_overlap) { - rbd_obj_request_submit(orig_request); - return; - } - - /* - * Our only purpose here is to determine whether the object - * exists, and we don't want to treat the non-existence as - * an error. If something else comes back, transfer the - * error to the original request and complete it now. - */ - if (!result) { - obj_request_existence_set(orig_request, true); - } else if (result == -ENOENT) { - obj_request_existence_set(orig_request, false); - } else { - goto fail_orig_request; - } - - /* - * Resubmit the original request now that we have recorded - * whether the target object exists. - */ - result = rbd_img_obj_request_submit(orig_request); - if (result) - goto fail_orig_request; - - return; - -fail_orig_request: - rbd_obj_request_error(orig_request, result); -} - -static int rbd_img_obj_exists_submit(struct rbd_obj_request *obj_request) -{ - struct rbd_device *rbd_dev = obj_request->img_request->rbd_dev; - struct rbd_obj_request *stat_request; - struct page **pages; - int ret; - - stat_request = rbd_obj_request_create(OBJ_REQUEST_NODATA); - if (!stat_request) - return -ENOMEM; - - stat_request->object_no = obj_request->object_no; - - stat_request->osd_req = rbd_osd_req_create(rbd_dev, OBJ_OP_READ, 1, - stat_request); - if (!stat_request->osd_req) { - ret = -ENOMEM; - goto fail_stat_request; - } - - /* - * The response data for a STAT call consists of: - * le64 length; - * struct { - * le32 tv_sec; - * le32 tv_nsec; - * } mtime; - */ - pages = ceph_alloc_page_vector(1, GFP_NOIO); - if (IS_ERR(pages)) { - ret = PTR_ERR(pages); - goto fail_stat_request; - } - - osd_req_op_init(stat_request->osd_req, 0, CEPH_OSD_OP_STAT, 0); - osd_req_op_raw_data_in_pages(stat_request->osd_req, 0, pages, - 8 + sizeof(struct ceph_timespec), - 0, false, true); - - rbd_obj_request_get(obj_request); - stat_request->obj_request = obj_request; - stat_request->callback = rbd_img_obj_exists_callback; - - rbd_obj_request_submit(stat_request); - return 0; - -fail_stat_request: - rbd_obj_request_put(stat_request); - return ret; -} - -static bool img_obj_request_simple(struct rbd_obj_request *obj_request) -{ - struct rbd_img_request *img_request = obj_request->img_request; - struct rbd_device *rbd_dev = img_request->rbd_dev; - - /* Reads */ - if (!img_request_write_test(img_request) && - !img_request_discard_test(img_request)) - return true; - - /* Non-layered writes */ - if (!img_request_layered_test(img_request)) - return true; - - /* - * Layered writes outside of the parent overlap range don't - * share any data with the parent. - */ - if (!obj_request_overlaps_parent(obj_request)) - return true; - - /* - * Entire-object layered writes - we will overwrite whatever - * parent data there is anyway. - */ - if (!obj_request->offset && - obj_request->length == rbd_obj_bytes(&rbd_dev->header)) - return true; - - /* - * If the object is known to already exist, its parent data has - * already been copied. - */ - if (obj_request_known_test(obj_request) && - obj_request_exists_test(obj_request)) - return true; - - return false; -} - -static int rbd_img_obj_request_submit(struct rbd_obj_request *obj_request) -{ - rbd_assert(obj_request_img_data_test(obj_request)); - rbd_assert(obj_request_type_valid(obj_request->type)); - rbd_assert(obj_request->img_request); - - if (img_obj_request_simple(obj_request)) { - rbd_obj_request_submit(obj_request); - return 0; - } - - /* - * It's a layered write. The target object might exist but - * we may not know that yet. If we know it doesn't exist, - * start by reading the data for the full target object from - * the parent so we can use it for a copyup to the target. - */ - if (obj_request_known_test(obj_request)) - return rbd_img_obj_parent_read_full(obj_request); - - /* We don't know whether the target exists. Go find out. */ - - return rbd_img_obj_exists_submit(obj_request); -} - static int rbd_img_request_submit(struct rbd_img_request *img_request) { struct rbd_obj_request *obj_request; @@ -3131,106 +2505,6 @@ static int setup_copyup_bvecs(struct rbd_obj_request *obj_req, u64 obj_overlap) return 0; } -static void rbd_img_parent_read_callback(struct rbd_img_request *img_request) -{ - struct rbd_obj_request *obj_request; - struct rbd_device *rbd_dev; - u64 obj_end; - u64 img_xferred; - int img_result; - - rbd_assert(img_request_child_test(img_request)); - - /* First get what we need from the image request and release it */ - - obj_request = img_request->obj_request; - img_xferred = img_request->xferred; - img_result = img_request->result; - rbd_img_request_put(img_request); - - /* - * If the overlap has become 0 (most likely because the - * image has been flattened) we need to re-submit the - * original request. - */ - rbd_assert(obj_request); - rbd_assert(obj_request->img_request); - rbd_dev = obj_request->img_request->rbd_dev; - if (!rbd_dev->parent_overlap) { - rbd_obj_request_submit(obj_request); - return; - } - - obj_request->result = img_result; - if (obj_request->result) - goto out; - - /* - * We need to zero anything beyond the parent overlap - * boundary. Since rbd_img_obj_request_read_callback() - * will zero anything beyond the end of a short read, an - * easy way to do this is to pretend the data from the - * parent came up short--ending at the overlap boundary. - */ - rbd_assert(obj_request->img_offset < U64_MAX - obj_request->length); - obj_end = obj_request->img_offset + obj_request->length; - if (obj_end > rbd_dev->parent_overlap) { - u64 xferred = 0; - - if (obj_request->img_offset < rbd_dev->parent_overlap) - xferred = rbd_dev->parent_overlap - - obj_request->img_offset; - - obj_request->xferred = min(img_xferred, xferred); - } else { - obj_request->xferred = img_xferred; - } -out: - rbd_img_obj_request_read_callback(obj_request); - rbd_obj_request_complete(obj_request); -} - -static void rbd_img_parent_read(struct rbd_obj_request *obj_request) -{ - struct rbd_img_request *img_request; - int result; - - rbd_assert(obj_request_img_data_test(obj_request)); - rbd_assert(obj_request->img_request != NULL); - rbd_assert(obj_request->result == (s32) -ENOENT); - rbd_assert(obj_request_type_valid(obj_request->type)); - - /* rbd_read_finish(obj_request, obj_request->length); */ - img_request = rbd_parent_request_create(obj_request, - obj_request->img_offset, - obj_request->length); - result = -ENOMEM; - if (!img_request) - goto out_err; - - if (obj_request->type == OBJ_REQUEST_BIO) - result = rbd_img_request_fill(img_request, OBJ_REQUEST_BIO, - &obj_request->bio_pos); - else - result = rbd_img_request_fill(img_request, OBJ_REQUEST_BVECS, - &obj_request->bvec_pos); - if (result) - goto out_err; - - img_request->callback = rbd_img_parent_read_callback; - result = rbd_img_request_submit(img_request); - if (result) - goto out_err; - - return; -out_err: - if (img_request) - rbd_img_request_put(img_request); - obj_request->result = result; - obj_request->xferred = 0; - obj_request_done_set(obj_request); -} - static int rbd_obj_handle_write_guard(struct rbd_obj_request *obj_req) { struct rbd_device *rbd_dev = obj_req->img_request->rbd_dev; -- cgit v1.2.3-59-g8ed1b From a162b308dc30ddeb848a1445534f5b04e41e1ed5 Mon Sep 17 00:00:00 2001 From: Ilya Dryomov Date: Tue, 30 Jan 2018 17:52:10 +0100 Subject: rbd: simplify rbd_osd_req_create() No need to pass rbd_dev and op_type to rbd_osd_req_create(): there are no standalone (!IMG_DATA) object requests anymore and osd_req->r_flags can be set in rbd_osd_req_format_{read,write}(). Signed-off-by: Ilya Dryomov --- drivers/block/rbd.c | 59 +++++++++++++---------------------------------------- 1 file changed, 14 insertions(+), 45 deletions(-) diff --git a/drivers/block/rbd.c b/drivers/block/rbd.c index e7e99e7fd874..c4260925bc57 100644 --- a/drivers/block/rbd.c +++ b/drivers/block/rbd.c @@ -1629,6 +1629,7 @@ static void rbd_osd_req_format_read(struct rbd_obj_request *obj_request) struct ceph_osd_request *osd_req = obj_request->osd_req; rbd_assert(obj_request_img_data_test(obj_request)); + osd_req->r_flags = CEPH_OSD_FLAG_READ; osd_req->r_snapid = obj_request->img_request->snap_id; } @@ -1636,32 +1637,33 @@ static void rbd_osd_req_format_write(struct rbd_obj_request *obj_request) { struct ceph_osd_request *osd_req = obj_request->osd_req; + osd_req->r_flags = CEPH_OSD_FLAG_WRITE; ktime_get_real_ts(&osd_req->r_mtime); osd_req->r_data_offset = obj_request->offset; } static struct ceph_osd_request * -__rbd_osd_req_create(struct rbd_device *rbd_dev, - struct ceph_snap_context *snapc, - int num_ops, unsigned int flags, - struct rbd_obj_request *obj_request) +rbd_osd_req_create(struct rbd_obj_request *obj_req, unsigned int num_ops) { + struct rbd_img_request *img_req = obj_req->img_request; + struct rbd_device *rbd_dev = img_req->rbd_dev; struct ceph_osd_client *osdc = &rbd_dev->rbd_client->client->osdc; struct ceph_osd_request *req; const char *name_format = rbd_dev->image_format == 1 ? RBD_V1_DATA_FORMAT : RBD_V2_DATA_FORMAT; - req = ceph_osdc_alloc_request(osdc, snapc, num_ops, false, GFP_NOIO); + req = ceph_osdc_alloc_request(osdc, + (rbd_img_is_write(img_req) ? img_req->snapc : NULL), + num_ops, false, GFP_NOIO); if (!req) return NULL; - req->r_flags = flags; req->r_callback = rbd_osd_req_callback; - req->r_priv = obj_request; + req->r_priv = obj_req; req->r_base_oloc.pool = rbd_dev->layout.pool_id; if (ceph_oid_aprintf(&req->r_base_oid, GFP_NOIO, name_format, - rbd_dev->header.object_prefix, obj_request->object_no)) + rbd_dev->header.object_prefix, obj_req->object_no)) goto err_req; if (ceph_osdc_alloc_messages(req, GFP_NOIO)) @@ -1674,30 +1676,6 @@ err_req: return NULL; } -static struct ceph_osd_request *rbd_osd_req_create( - struct rbd_device *rbd_dev, - enum obj_operation_type op_type, - unsigned int num_ops, - struct rbd_obj_request *obj_request) -{ - struct ceph_snap_context *snapc = NULL; - - if (obj_request_img_data_test(obj_request) && - (op_type == OBJ_OP_DISCARD || op_type == OBJ_OP_WRITE)) { - struct rbd_img_request *img_request = obj_request->img_request; - if (op_type == OBJ_OP_WRITE) { - rbd_assert(img_request_write_test(img_request)); - } else { - rbd_assert(img_request_discard_test(img_request)); - } - snapc = img_request->snapc; - } - - return __rbd_osd_req_create(rbd_dev, snapc, num_ops, - (op_type == OBJ_OP_WRITE || op_type == OBJ_OP_DISCARD) ? - CEPH_OSD_FLAG_WRITE : CEPH_OSD_FLAG_READ, obj_request); -} - static void rbd_osd_req_destroy(struct ceph_osd_request *osd_req) { ceph_osdc_put_request(osd_req); @@ -2039,9 +2017,7 @@ static void rbd_osd_req_setup_data(struct rbd_obj_request *obj_req, u32 which) static int rbd_obj_setup_read(struct rbd_obj_request *obj_req) { - struct rbd_device *rbd_dev = obj_req->img_request->rbd_dev; - - obj_req->osd_req = rbd_osd_req_create(rbd_dev, OBJ_OP_READ, 1, obj_req); + obj_req->osd_req = rbd_osd_req_create(obj_req, 1); if (!obj_req->osd_req) return -ENOMEM; @@ -2102,7 +2078,6 @@ static void __rbd_obj_setup_write(struct rbd_obj_request *obj_req, static int rbd_obj_setup_write(struct rbd_obj_request *obj_req) { - struct rbd_device *rbd_dev = obj_req->img_request->rbd_dev; unsigned int num_osd_ops, which = 0; int ret; @@ -2114,8 +2089,7 @@ static int rbd_obj_setup_write(struct rbd_obj_request *obj_req) num_osd_ops = 2; /* setallochint + write/writefull */ } - obj_req->osd_req = rbd_osd_req_create(rbd_dev, OBJ_OP_WRITE, - num_osd_ops, obj_req); + obj_req->osd_req = rbd_osd_req_create(obj_req, num_osd_ops); if (!obj_req->osd_req) return -ENOMEM; @@ -2159,7 +2133,6 @@ static void __rbd_obj_setup_discard(struct rbd_obj_request *obj_req, static int rbd_obj_setup_discard(struct rbd_obj_request *obj_req) { - struct rbd_device *rbd_dev = obj_req->img_request->rbd_dev; unsigned int num_osd_ops, which = 0; int ret; @@ -2176,8 +2149,7 @@ static int rbd_obj_setup_discard(struct rbd_obj_request *obj_req) } } - obj_req->osd_req = rbd_osd_req_create(rbd_dev, OBJ_OP_DISCARD, - num_osd_ops, obj_req); + obj_req->osd_req = rbd_osd_req_create(obj_req, num_osd_ops); if (!obj_req->osd_req) return -ENOMEM; @@ -2426,7 +2398,6 @@ static bool is_zero_bvecs(struct bio_vec *bvecs, u32 bytes) static int rbd_obj_issue_copyup(struct rbd_obj_request *obj_req, u32 bytes) { - struct rbd_device *rbd_dev = obj_req->img_request->rbd_dev; unsigned int num_osd_ops = obj_req->osd_req->r_num_ops; dout("%s obj_req %p bytes %u\n", __func__, obj_req, bytes); @@ -2438,9 +2409,7 @@ static int rbd_obj_issue_copyup(struct rbd_obj_request *obj_req, u32 bytes) * the original request. The original request was stat + op(s), * the new copyup request will be copyup + the same op(s). */ - obj_req->osd_req = rbd_osd_req_create(rbd_dev, - rbd_img_request_op_type(obj_req->img_request), - num_osd_ops, obj_req); + obj_req->osd_req = rbd_osd_req_create(obj_req, num_osd_ops); if (!obj_req->osd_req) return -ENOMEM; -- cgit v1.2.3-59-g8ed1b From 9bb0248d9eb9438b991ba538e30eedb493cf1fb4 Mon Sep 17 00:00:00 2001 From: Ilya Dryomov Date: Tue, 30 Jan 2018 17:52:10 +0100 Subject: rbd: add img_req->op_type field Store op_type in its own field instead of packing it into flags. Signed-off-by: Ilya Dryomov --- drivers/block/rbd.c | 75 +++++++++-------------------------------------------- 1 file changed, 12 insertions(+), 63 deletions(-) diff --git a/drivers/block/rbd.c b/drivers/block/rbd.c index c4260925bc57..e542fda18395 100644 --- a/drivers/block/rbd.c +++ b/drivers/block/rbd.c @@ -302,14 +302,13 @@ struct rbd_obj_request { }; enum img_req_flags { - IMG_REQ_WRITE, /* I/O direction: read = 0, write = 1 */ IMG_REQ_CHILD, /* initiator: block = 0, child image = 1 */ IMG_REQ_LAYERED, /* ENOENT handling: normal = 0, layered = 1 */ - IMG_REQ_DISCARD, /* discard: normal = 0, discard request = 1 */ }; struct rbd_img_request { struct rbd_device *rbd_dev; + enum obj_operation_type op_type; u64 offset; /* starting image byte offset */ u64 length; /* byte count from offset */ unsigned long flags; @@ -1490,33 +1489,6 @@ static void rbd_img_request_complete(struct rbd_img_request *img_request) * is conditionally set to 1 at image request initialization time * and currently never change thereafter. */ -static void img_request_write_set(struct rbd_img_request *img_request) -{ - set_bit(IMG_REQ_WRITE, &img_request->flags); - smp_mb(); -} - -static bool img_request_write_test(struct rbd_img_request *img_request) -{ - smp_mb(); - return test_bit(IMG_REQ_WRITE, &img_request->flags) != 0; -} - -/* - * Set the discard flag when the img_request is an discard request - */ -static void img_request_discard_set(struct rbd_img_request *img_request) -{ - set_bit(IMG_REQ_DISCARD, &img_request->flags); - smp_mb(); -} - -static bool img_request_discard_test(struct rbd_img_request *img_request) -{ - smp_mb(); - return test_bit(IMG_REQ_DISCARD, &img_request->flags) != 0; -} - static void img_request_child_set(struct rbd_img_request *img_request) { set_bit(IMG_REQ_CHILD, &img_request->flags); @@ -1553,17 +1525,6 @@ static bool img_request_layered_test(struct rbd_img_request *img_request) return test_bit(IMG_REQ_LAYERED, &img_request->flags) != 0; } -static enum obj_operation_type -rbd_img_request_op_type(struct rbd_img_request *img_request) -{ - if (img_request_write_test(img_request)) - return OBJ_OP_WRITE; - else if (img_request_discard_test(img_request)) - return OBJ_OP_DISCARD; - else - return OBJ_OP_READ; -} - static bool rbd_obj_is_entire(struct rbd_obj_request *obj_req) { struct rbd_device *rbd_dev = obj_req->img_request->rbd_dev; @@ -1582,7 +1543,7 @@ static bool rbd_obj_is_tail(struct rbd_obj_request *obj_req) static bool rbd_img_is_write(struct rbd_img_request *img_req) { - switch (rbd_img_request_op_type(img_req)) { + switch (img_req->op_type) { case OBJ_OP_READ: return false; case OBJ_OP_WRITE: @@ -1816,17 +1777,14 @@ static struct rbd_img_request *rbd_img_request_create( return NULL; img_request->rbd_dev = rbd_dev; + img_request->op_type = op_type; img_request->offset = offset; img_request->length = length; - if (op_type == OBJ_OP_DISCARD) { - img_request_discard_set(img_request); - img_request->snapc = snapc; - } else if (op_type == OBJ_OP_WRITE) { - img_request_write_set(img_request); - img_request->snapc = snapc; - } else { + if (!rbd_img_is_write(img_request)) img_request->snap_id = rbd_dev->spec->snap_id; - } + else + img_request->snapc = snapc; + if (rbd_dev_parent_get(rbd_dev)) img_request_layered_set(img_request); @@ -1859,8 +1817,7 @@ static void rbd_img_request_destroy(struct kref *kref) rbd_dev_parent_put(img_request->rbd_dev); } - if (img_request_write_test(img_request) || - img_request_discard_test(img_request)) + if (rbd_img_is_write(img_request)) ceph_put_snap_context(img_request->snapc); kmem_cache_free(rbd_img_request_cache, img_request); @@ -1918,17 +1875,9 @@ static bool rbd_img_obj_end_request(struct rbd_obj_request *obj_request) result = obj_request->result; if (result) { struct rbd_device *rbd_dev = img_request->rbd_dev; - enum obj_operation_type op_type; - - if (img_request_discard_test(img_request)) - op_type = OBJ_OP_DISCARD; - else if (img_request_write_test(img_request)) - op_type = OBJ_OP_WRITE; - else - op_type = OBJ_OP_READ; rbd_warn(rbd_dev, "%s %llx at %llx (%llx)", - obj_op_name(op_type), obj_request->length, + obj_op_name(img_request->op_type), obj_request->length, obj_request->img_offset, obj_request->offset); rbd_warn(rbd_dev, " result %d xferred %x", result, xferred); @@ -2175,7 +2124,7 @@ static int __rbd_img_fill_request(struct rbd_img_request *img_req) int ret; for_each_obj_request(img_req, obj_req) { - switch (rbd_img_request_op_type(img_req)) { + switch (img_req->op_type) { case OBJ_OP_READ: ret = rbd_obj_setup_read(obj_req); break; @@ -2428,7 +2377,7 @@ static int rbd_obj_issue_copyup(struct rbd_obj_request *obj_req, u32 bytes) osd_req_op_cls_request_data_bvecs(obj_req->osd_req, 0, obj_req->copyup_bvecs, bytes); - switch (rbd_img_request_op_type(obj_req->img_request)) { + switch (obj_req->img_request->op_type) { case OBJ_OP_WRITE: __rbd_obj_setup_write(obj_req, 1); break; @@ -2572,7 +2521,7 @@ again: */ static bool __rbd_obj_handle_request(struct rbd_obj_request *obj_req) { - switch (rbd_img_request_op_type(obj_req->img_request)) { + switch (obj_req->img_request->op_type) { case OBJ_OP_READ: return rbd_obj_handle_read(obj_req); case OBJ_OP_WRITE: -- cgit v1.2.3-59-g8ed1b From efbd1a1106f15f9260c7cb9a67f5c380a39b4fcc Mon Sep 17 00:00:00 2001 From: Ilya Dryomov Date: Tue, 30 Jan 2018 17:52:11 +0100 Subject: rbd: update rbd_img_request_submit() signature It should be void now. Also, object requests are unlinked only in image request destructor, which can't run before rbd_img_request_put(), so no need for _safe. Signed-off-by: Ilya Dryomov --- drivers/block/rbd.c | 13 +++---------- 1 file changed, 3 insertions(+), 10 deletions(-) diff --git a/drivers/block/rbd.c b/drivers/block/rbd.c index e542fda18395..015bd5303f0e 100644 --- a/drivers/block/rbd.c +++ b/drivers/block/rbd.c @@ -2223,21 +2223,17 @@ out_unwind: return -ENOMEM; } -static int rbd_img_request_submit(struct rbd_img_request *img_request) +static void rbd_img_request_submit(struct rbd_img_request *img_request) { struct rbd_obj_request *obj_request; - struct rbd_obj_request *next_obj_request; - int ret = 0; dout("%s: img %p\n", __func__, img_request); rbd_img_request_get(img_request); - for_each_obj_request_safe(img_request, obj_request, next_obj_request) { + for_each_obj_request(img_request, obj_request) rbd_obj_request_submit(obj_request); - } rbd_img_request_put(img_request); - return ret; } static void rbd_img_end_child_request(struct rbd_img_request *img_req); @@ -3668,10 +3664,7 @@ static void rbd_queue_workfn(struct work_struct *work) if (result) goto err_img_request; - result = rbd_img_request_submit(img_request); - if (result) - goto err_img_request; - + rbd_img_request_submit(img_request); if (must_be_locked) up_read(&rbd_dev->lock_rwsem); return; -- cgit v1.2.3-59-g8ed1b From 7114edac357b8cc27cf95a4d7eed75d07c41970d Mon Sep 17 00:00:00 2001 From: Ilya Dryomov Date: Thu, 1 Feb 2018 11:50:47 +0100 Subject: rbd: new request completion code Do away with partial request completions and all the associated complexity. Individual object requests no longer need to be completed in order -- when the last one becomes ready, we complete the entire higher level request all at once. This also wraps up the conversion to a state machine model and eliminates the recursion described in commit 6d69bb536bac ("rbd: prevent kernel stack blow up on rbd map"). Signed-off-by: Ilya Dryomov --- drivers/block/rbd.c | 68 +++++++++++++++++++++++++++++++++++++++++++---------- 1 file changed, 55 insertions(+), 13 deletions(-) diff --git a/drivers/block/rbd.c b/drivers/block/rbd.c index 015bd5303f0e..2eb0abd104f5 100644 --- a/drivers/block/rbd.c +++ b/drivers/block/rbd.c @@ -327,6 +327,7 @@ struct rbd_img_request { int result; /* first nonzero obj_request result */ u32 obj_request_count; + u32 pending_count; struct list_head obj_requests; /* rbd_obj_request structs */ struct kref kref; @@ -1406,6 +1407,7 @@ static inline void rbd_img_obj_request_add(struct rbd_img_request *img_request, obj_request_img_data_set(obj_request); rbd_assert(obj_request->which != BAD_WHICH); img_request->obj_request_count++; + img_request->pending_count++; list_add_tail(&obj_request->links, &img_request->obj_requests); dout("%s: img %p obj %p w=%u\n", __func__, img_request, obj_request, obj_request->which); @@ -1451,10 +1453,6 @@ static void rbd_obj_request_submit(struct rbd_obj_request *obj_request) dout("%s %p object_no %016llx %llu~%llu osd_req %p\n", __func__, obj_request, obj_request->object_no, obj_request->offset, obj_request->length, osd_req); - if (obj_request_img_data_test(obj_request)) { - WARN_ON(obj_request->callback != rbd_img_obj_callback); - rbd_img_request_get(obj_request->img_request); - } ceph_osdc_start_request(osd_req->r_osdc, osd_req, false); } @@ -2236,8 +2234,6 @@ static void rbd_img_request_submit(struct rbd_img_request *img_request) rbd_img_request_put(img_request); } -static void rbd_img_end_child_request(struct rbd_img_request *img_req); - static int rbd_obj_read_from_parent(struct rbd_obj_request *obj_req, u64 img_offset, u32 bytes) { @@ -2249,8 +2245,6 @@ static int rbd_obj_read_from_parent(struct rbd_obj_request *obj_req, if (!child_img_req) return -ENOMEM; - child_img_req->callback = rbd_img_end_child_request; - if (!rbd_img_is_write(img_req)) { switch (obj_req->type) { case OBJ_REQUEST_BIO: @@ -2386,8 +2380,6 @@ static int rbd_obj_issue_copyup(struct rbd_obj_request *obj_req, u32 bytes) } rbd_obj_request_submit(obj_req); - /* FIXME: in lieu of rbd_img_obj_callback() */ - rbd_img_request_put(obj_req->img_request); return 0; } @@ -2540,6 +2532,29 @@ static bool __rbd_obj_handle_request(struct rbd_obj_request *obj_req) } } +static void rbd_obj_end_request(struct rbd_obj_request *obj_req) +{ + struct rbd_img_request *img_req = obj_req->img_request; + + rbd_assert((!obj_req->result && + obj_req->xferred == obj_req->length) || + (obj_req->result < 0 && !obj_req->xferred)); + if (!obj_req->result) { + img_req->xferred += obj_req->xferred; + return; + } + + rbd_warn(img_req->rbd_dev, + "%s at objno %llu %llu~%llu result %d xferred %llu", + obj_op_name(img_req->op_type), obj_req->object_no, + obj_req->offset, obj_req->length, obj_req->result, + obj_req->xferred); + if (!img_req->result) { + img_req->result = obj_req->result; + img_req->xferred = 0; + } +} + static void rbd_img_end_child_request(struct rbd_img_request *img_req) { struct rbd_obj_request *obj_req = img_req->obj_request; @@ -2549,17 +2564,44 @@ static void rbd_img_end_child_request(struct rbd_img_request *img_req) obj_req->result = img_req->result; obj_req->xferred = img_req->xferred; rbd_img_request_put(img_req); +} - rbd_obj_handle_request(obj_req); +static void rbd_img_end_request(struct rbd_img_request *img_req) +{ + rbd_assert(!test_bit(IMG_REQ_CHILD, &img_req->flags)); + rbd_assert((!img_req->result && + img_req->xferred == blk_rq_bytes(img_req->rq)) || + (img_req->result < 0 && !img_req->xferred)); + + blk_mq_end_request(img_req->rq, + errno_to_blk_status(img_req->result)); + rbd_img_request_put(img_req); } static void rbd_obj_handle_request(struct rbd_obj_request *obj_req) { + struct rbd_img_request *img_req; + +again: if (!__rbd_obj_handle_request(obj_req)) return; - obj_request_done_set(obj_req); - rbd_obj_request_complete(obj_req); + img_req = obj_req->img_request; + spin_lock(&img_req->completion_lock); + rbd_obj_end_request(obj_req); + rbd_assert(img_req->pending_count); + if (--img_req->pending_count) { + spin_unlock(&img_req->completion_lock); + return; + } + + spin_unlock(&img_req->completion_lock); + if (test_bit(IMG_REQ_CHILD, &img_req->flags)) { + obj_req = img_req->obj_request; + rbd_img_end_child_request(img_req); + goto again; + } + rbd_img_end_request(img_req); } static const struct rbd_client_id rbd_empty_cid; -- cgit v1.2.3-59-g8ed1b From 15961b44947d9d53bfec0a89b5ebbcf30afeb6ac Mon Sep 17 00:00:00 2001 From: Ilya Dryomov Date: Thu, 1 Feb 2018 11:50:47 +0100 Subject: rbd: remove old request completion code Signed-off-by: Ilya Dryomov --- drivers/block/rbd.c | 175 +--------------------------------------------------- 1 file changed, 3 insertions(+), 172 deletions(-) diff --git a/drivers/block/rbd.c b/drivers/block/rbd.c index 2eb0abd104f5..959aa95cd626 100644 --- a/drivers/block/rbd.c +++ b/drivers/block/rbd.c @@ -209,12 +209,6 @@ struct rbd_client { }; struct rbd_img_request; -typedef void (*rbd_img_callback_t)(struct rbd_img_request *); - -#define BAD_WHICH U32_MAX /* Good which or bad which, which? */ - -struct rbd_obj_request; -typedef void (*rbd_obj_callback_t)(struct rbd_obj_request *); enum obj_request_type { OBJ_REQUEST_NODATA = 1, @@ -229,7 +223,6 @@ enum obj_operation_type { }; enum obj_req_flags { - OBJ_REQ_DONE, /* completion flag: not done = 0, done = 1 */ OBJ_REQ_IMG_DATA, /* object usage: standalone = 0, image = 1 */ }; @@ -268,17 +261,11 @@ struct rbd_obj_request { /* * An object request associated with an image will have its * img_data flag set; a standalone object request will not. - * - * Finally, an object request for rbd image data will have - * which != BAD_WHICH, and will have a non-null img_request - * pointer. The value of which will be in the range - * 0..(img_request->obj_request_count-1). */ struct rbd_img_request *img_request; u64 img_offset; /* links for img_request->obj_requests list */ struct list_head links; - u32 which; /* posn image request list */ enum obj_request_type type; union { @@ -296,8 +283,6 @@ struct rbd_obj_request { u64 xferred; /* bytes transferred */ int result; - rbd_obj_callback_t callback; - struct kref kref; }; @@ -320,9 +305,7 @@ struct rbd_img_request { struct request *rq; /* block request */ struct rbd_obj_request *obj_request; /* obj req initiator */ }; - spinlock_t completion_lock;/* protects next_completion */ - u32 next_completion; - rbd_img_callback_t callback; + spinlock_t completion_lock; u64 xferred;/* aggregate bytes transferred */ int result; /* first nonzero obj_request result */ @@ -335,8 +318,6 @@ struct rbd_img_request { #define for_each_obj_request(ireq, oreq) \ list_for_each_entry(oreq, &(ireq)->obj_requests, links) -#define for_each_obj_request_from(ireq, oreq) \ - list_for_each_entry_from(oreq, &(ireq)->obj_requests, links) #define for_each_obj_request_safe(ireq, oreq, n) \ list_for_each_entry_safe_reverse(oreq, n, &(ireq)->obj_requests, links) @@ -1332,24 +1313,6 @@ static bool obj_request_img_data_test(struct rbd_obj_request *obj_request) return test_bit(OBJ_REQ_IMG_DATA, &obj_request->flags) != 0; } -static void obj_request_done_set(struct rbd_obj_request *obj_request) -{ - if (test_and_set_bit(OBJ_REQ_DONE, &obj_request->flags)) { - struct rbd_device *rbd_dev = NULL; - - if (obj_request_img_data_test(obj_request)) - rbd_dev = obj_request->img_request->rbd_dev; - rbd_warn(rbd_dev, "obj_request %p already marked done", - obj_request); - } -} - -static bool obj_request_done_test(struct rbd_obj_request *obj_request) -{ - smp_mb(); - return test_bit(OBJ_REQ_DONE, &obj_request->flags) != 0; -} - static bool obj_request_overlaps_parent(struct rbd_obj_request *obj_request) { struct rbd_device *rbd_dev = obj_request->img_request->rbd_dev; @@ -1402,33 +1365,24 @@ static inline void rbd_img_obj_request_add(struct rbd_img_request *img_request, /* Image request now owns object's original reference */ obj_request->img_request = img_request; - obj_request->which = img_request->obj_request_count; rbd_assert(!obj_request_img_data_test(obj_request)); obj_request_img_data_set(obj_request); - rbd_assert(obj_request->which != BAD_WHICH); img_request->obj_request_count++; img_request->pending_count++; list_add_tail(&obj_request->links, &img_request->obj_requests); - dout("%s: img %p obj %p w=%u\n", __func__, img_request, obj_request, - obj_request->which); + dout("%s: img %p obj %p\n", __func__, img_request, obj_request); } static inline void rbd_img_obj_request_del(struct rbd_img_request *img_request, struct rbd_obj_request *obj_request) { - rbd_assert(obj_request->which != BAD_WHICH); - - dout("%s: img %p obj %p w=%u\n", __func__, img_request, obj_request, - obj_request->which); + dout("%s: img %p obj %p\n", __func__, img_request, obj_request); list_del(&obj_request->links); rbd_assert(img_request->obj_request_count > 0); img_request->obj_request_count--; - rbd_assert(obj_request->which == img_request->obj_request_count); - obj_request->which = BAD_WHICH; rbd_assert(obj_request_img_data_test(obj_request)); rbd_assert(obj_request->img_request == img_request); obj_request->img_request = NULL; - obj_request->callback = NULL; rbd_obj_request_put(obj_request); } @@ -1444,8 +1398,6 @@ static bool obj_request_type_valid(enum obj_request_type type) } } -static void rbd_img_obj_callback(struct rbd_obj_request *obj_request); - static void rbd_obj_request_submit(struct rbd_obj_request *obj_request) { struct ceph_osd_request *osd_req = obj_request->osd_req; @@ -1456,32 +1408,6 @@ static void rbd_obj_request_submit(struct rbd_obj_request *obj_request) ceph_osdc_start_request(osd_req->r_osdc, osd_req, false); } -static void rbd_img_request_complete(struct rbd_img_request *img_request) -{ - - dout("%s: img %p\n", __func__, img_request); - - /* - * If no error occurred, compute the aggregate transfer - * count for the image request. We could instead use - * atomic64_cmpxchg() to update it as each object request - * completes; not clear which way is better off hand. - */ - if (!img_request->result) { - struct rbd_obj_request *obj_request; - u64 xferred = 0; - - for_each_obj_request(img_request, obj_request) - xferred += obj_request->xferred; - img_request->xferred = xferred; - } - - if (img_request->callback) - img_request->callback(img_request); - else - rbd_img_request_put(img_request); -} - /* * The default/initial value for all image request flags is 0. Each * is conditionally set to 1 at image request initialization time @@ -1552,13 +1478,6 @@ static bool rbd_img_is_write(struct rbd_img_request *img_req) } } -static void rbd_obj_request_complete(struct rbd_obj_request *obj_request) -{ - dout("%s: obj %p cb %p\n", __func__, obj_request, - obj_request->callback); - obj_request->callback(obj_request); -} - static void rbd_obj_handle_request(struct rbd_obj_request *obj_req); static void rbd_osd_req_callback(struct ceph_osd_request *osd_req) @@ -1651,7 +1570,6 @@ rbd_obj_request_create(enum obj_request_type type) if (!obj_request) return NULL; - obj_request->which = BAD_WHICH; obj_request->type = type; INIT_LIST_HEAD(&obj_request->links); kref_init(&obj_request->kref); @@ -1670,7 +1588,6 @@ static void rbd_obj_request_destroy(struct kref *kref) dout("%s: obj %p\n", __func__, obj_request); rbd_assert(obj_request->img_request == NULL); - rbd_assert(obj_request->which == BAD_WHICH); if (obj_request->osd_req) rbd_osd_req_destroy(obj_request->osd_req); @@ -1858,91 +1775,6 @@ static void rbd_parent_request_destroy(struct kref *kref) rbd_img_request_destroy(kref); } -static bool rbd_img_obj_end_request(struct rbd_obj_request *obj_request) -{ - struct rbd_img_request *img_request; - unsigned int xferred; - int result; - bool more; - - rbd_assert(obj_request_img_data_test(obj_request)); - img_request = obj_request->img_request; - - rbd_assert(obj_request->xferred <= (u64)UINT_MAX); - xferred = (unsigned int)obj_request->xferred; - result = obj_request->result; - if (result) { - struct rbd_device *rbd_dev = img_request->rbd_dev; - - rbd_warn(rbd_dev, "%s %llx at %llx (%llx)", - obj_op_name(img_request->op_type), obj_request->length, - obj_request->img_offset, obj_request->offset); - rbd_warn(rbd_dev, " result %d xferred %x", - result, xferred); - if (!img_request->result) - img_request->result = result; - /* - * Need to end I/O on the entire obj_request worth of - * bytes in case of error. - */ - xferred = obj_request->length; - } - - if (img_request_child_test(img_request)) { - rbd_assert(img_request->obj_request != NULL); - more = obj_request->which < img_request->obj_request_count - 1; - } else { - blk_status_t status = errno_to_blk_status(result); - - rbd_assert(img_request->rq != NULL); - - more = blk_update_request(img_request->rq, status, xferred); - if (!more) - __blk_mq_end_request(img_request->rq, status); - } - - return more; -} - -static void rbd_img_obj_callback(struct rbd_obj_request *obj_request) -{ - struct rbd_img_request *img_request; - u32 which = obj_request->which; - bool more = true; - - rbd_assert(obj_request_img_data_test(obj_request)); - img_request = obj_request->img_request; - - dout("%s: img %p obj %p\n", __func__, img_request, obj_request); - rbd_assert(img_request != NULL); - rbd_assert(img_request->obj_request_count > 0); - rbd_assert(which != BAD_WHICH); - rbd_assert(which < img_request->obj_request_count); - - spin_lock_irq(&img_request->completion_lock); - if (which != img_request->next_completion) - goto out; - - for_each_obj_request_from(img_request, obj_request) { - rbd_assert(more); - rbd_assert(which < img_request->obj_request_count); - - if (!obj_request_done_test(obj_request)) - break; - more = rbd_img_obj_end_request(obj_request); - which++; - } - - rbd_assert(more ^ (which == img_request->obj_request_count)); - img_request->next_completion = which; -out: - spin_unlock_irq(&img_request->completion_lock); - rbd_img_request_put(img_request); - - if (!more) - rbd_img_request_complete(img_request); -} - static void rbd_osd_req_setup_data(struct rbd_obj_request *obj_req, u32 which) { switch (obj_req->type) { @@ -2205,7 +2037,6 @@ static int rbd_img_request_fill(struct rbd_img_request *img_request, ceph_bvec_iter_advance(&bvec_it, length); } - obj_request->callback = rbd_img_obj_callback; obj_request->img_offset = img_offset; img_offset += length; -- cgit v1.2.3-59-g8ed1b From 0be2d60ed888a25016a05148e52feea4bf401b0e Mon Sep 17 00:00:00 2001 From: Ilya Dryomov Date: Thu, 1 Feb 2018 11:50:47 +0100 Subject: rbd: remove obj_req->flags field There are no standalone (!IMG_DATA) object requests anymore. Signed-off-by: Ilya Dryomov --- drivers/block/rbd.c | 35 ----------------------------------- 1 file changed, 35 deletions(-) diff --git a/drivers/block/rbd.c b/drivers/block/rbd.c index 959aa95cd626..7ec4d143f534 100644 --- a/drivers/block/rbd.c +++ b/drivers/block/rbd.c @@ -222,10 +222,6 @@ enum obj_operation_type { OBJ_OP_DISCARD, }; -enum obj_req_flags { - OBJ_REQ_IMG_DATA, /* object usage: standalone = 0, image = 1 */ -}; - /* * Writes go through the following state machine to deal with * layering: @@ -252,16 +248,11 @@ struct rbd_obj_request { u64 object_no; u64 offset; /* object start byte */ u64 length; /* bytes from offset */ - unsigned long flags; union { bool tried_parent; /* for reads */ enum rbd_obj_write_state write_state; /* for writes */ }; - /* - * An object request associated with an image will have its - * img_data flag set; a standalone object request will not. - */ struct rbd_img_request *img_request; u64 img_offset; /* links for img_request->obj_requests list */ @@ -1291,28 +1282,6 @@ static void rbd_obj_zero_range(struct rbd_obj_request *obj_req, u32 off, } } -/* - * The default/initial value for all object request flags is 0. For - * each flag, once its value is set to 1 it is never reset to 0 - * again. - */ -static void obj_request_img_data_set(struct rbd_obj_request *obj_request) -{ - if (test_and_set_bit(OBJ_REQ_IMG_DATA, &obj_request->flags)) { - struct rbd_device *rbd_dev; - - rbd_dev = obj_request->img_request->rbd_dev; - rbd_warn(rbd_dev, "obj_request %p already marked img_data", - obj_request); - } -} - -static bool obj_request_img_data_test(struct rbd_obj_request *obj_request) -{ - smp_mb(); - return test_bit(OBJ_REQ_IMG_DATA, &obj_request->flags) != 0; -} - static bool obj_request_overlaps_parent(struct rbd_obj_request *obj_request) { struct rbd_device *rbd_dev = obj_request->img_request->rbd_dev; @@ -1365,8 +1334,6 @@ static inline void rbd_img_obj_request_add(struct rbd_img_request *img_request, /* Image request now owns object's original reference */ obj_request->img_request = img_request; - rbd_assert(!obj_request_img_data_test(obj_request)); - obj_request_img_data_set(obj_request); img_request->obj_request_count++; img_request->pending_count++; list_add_tail(&obj_request->links, &img_request->obj_requests); @@ -1380,7 +1347,6 @@ static inline void rbd_img_obj_request_del(struct rbd_img_request *img_request, list_del(&obj_request->links); rbd_assert(img_request->obj_request_count > 0); img_request->obj_request_count--; - rbd_assert(obj_request_img_data_test(obj_request)); rbd_assert(obj_request->img_request == img_request); obj_request->img_request = NULL; rbd_obj_request_put(obj_request); @@ -1506,7 +1472,6 @@ static void rbd_osd_req_format_read(struct rbd_obj_request *obj_request) { struct ceph_osd_request *osd_req = obj_request->osd_req; - rbd_assert(obj_request_img_data_test(obj_request)); osd_req->r_flags = CEPH_OSD_FLAG_READ; osd_req->r_snapid = obj_request->img_request->snap_id; } -- cgit v1.2.3-59-g8ed1b From ecc633caebcc84a1469892e3f6f6f4b6a16f41af Mon Sep 17 00:00:00 2001 From: Ilya Dryomov Date: Thu, 1 Feb 2018 11:50:47 +0100 Subject: rbd: store data_type in img_req instead of obj_req All object requests are associated with an image request now -- avoid duplicating the same info in each object request. Signed-off-by: Ilya Dryomov --- drivers/block/rbd.c | 34 ++++++++-------------------------- 1 file changed, 8 insertions(+), 26 deletions(-) diff --git a/drivers/block/rbd.c b/drivers/block/rbd.c index 7ec4d143f534..6ce9e0b35461 100644 --- a/drivers/block/rbd.c +++ b/drivers/block/rbd.c @@ -258,7 +258,6 @@ struct rbd_obj_request { /* links for img_request->obj_requests list */ struct list_head links; - enum obj_request_type type; union { struct ceph_bio_iter bio_pos; struct { @@ -285,6 +284,7 @@ enum img_req_flags { struct rbd_img_request { struct rbd_device *rbd_dev; enum obj_operation_type op_type; + enum obj_request_type data_type; u64 offset; /* starting image byte offset */ u64 length; /* byte count from offset */ unsigned long flags; @@ -1270,7 +1270,7 @@ static void zero_bvecs(struct ceph_bvec_iter *bvec_pos, u32 off, u32 bytes) static void rbd_obj_zero_range(struct rbd_obj_request *obj_req, u32 off, u32 bytes) { - switch (obj_req->type) { + switch (obj_req->img_request->data_type) { case OBJ_REQUEST_BIO: zero_bios(&obj_req->bio_pos, off, bytes); break; @@ -1348,22 +1348,9 @@ static inline void rbd_img_obj_request_del(struct rbd_img_request *img_request, rbd_assert(img_request->obj_request_count > 0); img_request->obj_request_count--; rbd_assert(obj_request->img_request == img_request); - obj_request->img_request = NULL; rbd_obj_request_put(obj_request); } -static bool obj_request_type_valid(enum obj_request_type type) -{ - switch (type) { - case OBJ_REQUEST_NODATA: - case OBJ_REQUEST_BIO: - case OBJ_REQUEST_BVECS: - return true; - default: - return false; - } -} - static void rbd_obj_request_submit(struct rbd_obj_request *obj_request) { struct ceph_osd_request *osd_req = obj_request->osd_req; @@ -1524,18 +1511,14 @@ static void rbd_osd_req_destroy(struct ceph_osd_request *osd_req) ceph_osdc_put_request(osd_req); } -static struct rbd_obj_request * -rbd_obj_request_create(enum obj_request_type type) +static struct rbd_obj_request *rbd_obj_request_create(void) { struct rbd_obj_request *obj_request; - rbd_assert(obj_request_type_valid(type)); - obj_request = kmem_cache_zalloc(rbd_obj_request_cache, GFP_NOIO); if (!obj_request) return NULL; - obj_request->type = type; INIT_LIST_HEAD(&obj_request->links); kref_init(&obj_request->kref); @@ -1552,12 +1535,10 @@ static void rbd_obj_request_destroy(struct kref *kref) dout("%s: obj %p\n", __func__, obj_request); - rbd_assert(obj_request->img_request == NULL); - if (obj_request->osd_req) rbd_osd_req_destroy(obj_request->osd_req); - switch (obj_request->type) { + switch (obj_request->img_request->data_type) { case OBJ_REQUEST_NODATA: case OBJ_REQUEST_BIO: case OBJ_REQUEST_BVECS: @@ -1742,7 +1723,7 @@ static void rbd_parent_request_destroy(struct kref *kref) static void rbd_osd_req_setup_data(struct rbd_obj_request *obj_req, u32 which) { - switch (obj_req->type) { + switch (obj_req->img_request->data_type) { case OBJ_REQUEST_BIO: osd_req_op_extent_osd_data_bio(obj_req->osd_req, which, &obj_req->bio_pos, @@ -1979,7 +1960,7 @@ static int rbd_img_request_fill(struct rbd_img_request *img_request, u64 offset = rbd_segment_offset(rbd_dev, img_offset); u64 length = rbd_segment_length(rbd_dev, img_offset, resid); - obj_request = rbd_obj_request_create(type); + obj_request = rbd_obj_request_create(); if (!obj_request) goto out_unwind; @@ -2008,6 +1989,7 @@ static int rbd_img_request_fill(struct rbd_img_request *img_request, resid -= length; } + img_request->data_type = type; return __rbd_img_fill_request(img_request); out_unwind: @@ -2042,7 +2024,7 @@ static int rbd_obj_read_from_parent(struct rbd_obj_request *obj_req, return -ENOMEM; if (!rbd_img_is_write(img_req)) { - switch (obj_req->type) { + switch (img_req->data_type) { case OBJ_REQUEST_BIO: ret = rbd_img_request_fill(child_img_req, OBJ_REQUEST_BIO, -- cgit v1.2.3-59-g8ed1b From ed0811d2d243c4195580a9671266031907c02ca7 Mon Sep 17 00:00:00 2001 From: Ilya Dryomov Date: Fri, 2 Feb 2018 15:23:22 +0100 Subject: libceph: striping framework implementation Signed-off-by: Ilya Dryomov --- include/linux/ceph/striper.h | 65 +++++++++++++ net/ceph/Makefile | 1 + net/ceph/striper.c | 226 +++++++++++++++++++++++++++++++++++++++++++ 3 files changed, 292 insertions(+) create mode 100644 include/linux/ceph/striper.h create mode 100644 net/ceph/striper.c diff --git a/include/linux/ceph/striper.h b/include/linux/ceph/striper.h new file mode 100644 index 000000000000..74134ee5fdc8 --- /dev/null +++ b/include/linux/ceph/striper.h @@ -0,0 +1,65 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +#ifndef _LINUX_CEPH_STRIPER_H +#define _LINUX_CEPH_STRIPER_H + +#include +#include + +struct ceph_file_layout; + +struct ceph_object_extent { + struct list_head oe_item; + u64 oe_objno; + u64 oe_off; + u64 oe_len; +}; + +static inline void ceph_object_extent_init(struct ceph_object_extent *ex) +{ + INIT_LIST_HEAD(&ex->oe_item); +} + +/* + * Called for each mapped stripe unit. + * + * @bytes: number of bytes mapped, i.e. the minimum of the full length + * requested (file extent length) or the remainder of the stripe + * unit within an object + */ +typedef void (*ceph_object_extent_fn_t)(struct ceph_object_extent *ex, + u32 bytes, void *arg); + +int ceph_file_to_extents(struct ceph_file_layout *l, u64 off, u64 len, + struct list_head *object_extents, + struct ceph_object_extent *alloc_fn(void *arg), + void *alloc_arg, + ceph_object_extent_fn_t action_fn, + void *action_arg); +int ceph_iterate_extents(struct ceph_file_layout *l, u64 off, u64 len, + struct list_head *object_extents, + ceph_object_extent_fn_t action_fn, + void *action_arg); + +struct ceph_file_extent { + u64 fe_off; + u64 fe_len; +}; + +static inline u64 ceph_file_extents_bytes(struct ceph_file_extent *file_extents, + u32 num_file_extents) +{ + u64 bytes = 0; + u32 i; + + for (i = 0; i < num_file_extents; i++) + bytes += file_extents[i].fe_len; + + return bytes; +} + +int ceph_extent_to_file(struct ceph_file_layout *l, + u64 objno, u64 objoff, u64 objlen, + struct ceph_file_extent **file_extents, + u32 *num_file_extents); + +#endif diff --git a/net/ceph/Makefile b/net/ceph/Makefile index b4bded4b5396..12bf49772d24 100644 --- a/net/ceph/Makefile +++ b/net/ceph/Makefile @@ -8,6 +8,7 @@ libceph-y := ceph_common.o messenger.o msgpool.o buffer.o pagelist.o \ mon_client.o \ cls_lock_client.o \ osd_client.o osdmap.o crush/crush.o crush/mapper.o crush/hash.o \ + striper.o \ debugfs.o \ auth.o auth_none.o \ crypto.o armor.o \ diff --git a/net/ceph/striper.c b/net/ceph/striper.c new file mode 100644 index 000000000000..bc1e4de30df9 --- /dev/null +++ b/net/ceph/striper.c @@ -0,0 +1,226 @@ +/* SPDX-License-Identifier: GPL-2.0 */ + +#include + +#include +#include + +#include +#include +#include + +/* + * Return the last extent with given objno (@object_extents is sorted + * by objno). If not found, return NULL and set @add_pos so that the + * new extent can be added with list_add(add_pos, new_ex). + */ +static struct ceph_object_extent * +lookup_last(struct list_head *object_extents, u64 objno, + struct list_head **add_pos) +{ + struct list_head *pos; + + list_for_each_prev(pos, object_extents) { + struct ceph_object_extent *ex = + list_entry(pos, typeof(*ex), oe_item); + + if (ex->oe_objno == objno) + return ex; + + if (ex->oe_objno < objno) + break; + } + + *add_pos = pos; + return NULL; +} + +static struct ceph_object_extent * +lookup_containing(struct list_head *object_extents, u64 objno, + u64 objoff, u32 xlen) +{ + struct ceph_object_extent *ex; + + list_for_each_entry(ex, object_extents, oe_item) { + if (ex->oe_objno == objno && + ex->oe_off <= objoff && + ex->oe_off + ex->oe_len >= objoff + xlen) /* paranoia */ + return ex; + + if (ex->oe_objno > objno) + break; + } + + return NULL; +} + +/* + * Map a file extent to a sorted list of object extents. + * + * We want only one (or as few as possible) object extents per object. + * Adjacent object extents will be merged together, each returned object + * extent may reverse map to multiple different file extents. + * + * Call @alloc_fn for each new object extent and @action_fn for each + * mapped stripe unit, whether it was merged into an already allocated + * object extent or started a new object extent. + * + * Newly allocated object extents are added to @object_extents. + * To keep @object_extents sorted, successive calls to this function + * must map successive file extents (i.e. the list of file extents that + * are mapped using the same @object_extents must be sorted). + * + * The caller is responsible for @object_extents. + */ +int ceph_file_to_extents(struct ceph_file_layout *l, u64 off, u64 len, + struct list_head *object_extents, + struct ceph_object_extent *alloc_fn(void *arg), + void *alloc_arg, + ceph_object_extent_fn_t action_fn, + void *action_arg) +{ + struct ceph_object_extent *last_ex, *ex; + + while (len) { + struct list_head *add_pos = NULL; + u64 objno, objoff; + u32 xlen; + + ceph_calc_file_object_mapping(l, off, len, &objno, &objoff, + &xlen); + + last_ex = lookup_last(object_extents, objno, &add_pos); + if (!last_ex || last_ex->oe_off + last_ex->oe_len != objoff) { + ex = alloc_fn(alloc_arg); + if (!ex) + return -ENOMEM; + + ex->oe_objno = objno; + ex->oe_off = objoff; + ex->oe_len = xlen; + if (action_fn) + action_fn(ex, xlen, action_arg); + + if (!last_ex) + list_add(&ex->oe_item, add_pos); + else + list_add(&ex->oe_item, &last_ex->oe_item); + } else { + last_ex->oe_len += xlen; + if (action_fn) + action_fn(last_ex, xlen, action_arg); + } + + off += xlen; + len -= xlen; + } + + for (last_ex = list_first_entry(object_extents, typeof(*ex), oe_item), + ex = list_next_entry(last_ex, oe_item); + &ex->oe_item != object_extents; + last_ex = ex, ex = list_next_entry(ex, oe_item)) { + if (last_ex->oe_objno > ex->oe_objno || + (last_ex->oe_objno == ex->oe_objno && + last_ex->oe_off + last_ex->oe_len >= ex->oe_off)) { + WARN(1, "%s: object_extents list not sorted!\n", + __func__); + return -EINVAL; + } + } + + return 0; +} +EXPORT_SYMBOL(ceph_file_to_extents); + +/* + * A stripped down, non-allocating version of ceph_file_to_extents(), + * for when @object_extents is already populated. + */ +int ceph_iterate_extents(struct ceph_file_layout *l, u64 off, u64 len, + struct list_head *object_extents, + ceph_object_extent_fn_t action_fn, + void *action_arg) +{ + while (len) { + struct ceph_object_extent *ex; + u64 objno, objoff; + u32 xlen; + + ceph_calc_file_object_mapping(l, off, len, &objno, &objoff, + &xlen); + + ex = lookup_containing(object_extents, objno, objoff, xlen); + if (!ex) { + WARN(1, "%s: objno %llu %llu~%u not found!\n", + __func__, objno, objoff, xlen); + return -EINVAL; + } + + action_fn(ex, xlen, action_arg); + + off += xlen; + len -= xlen; + } + + return 0; +} +EXPORT_SYMBOL(ceph_iterate_extents); + +/* + * Reverse map an object extent to a sorted list of file extents. + * + * On success, the caller is responsible for: + * + * kfree(file_extents) + */ +int ceph_extent_to_file(struct ceph_file_layout *l, + u64 objno, u64 objoff, u64 objlen, + struct ceph_file_extent **file_extents, + u32 *num_file_extents) +{ + u32 stripes_per_object = l->object_size / l->stripe_unit; + u64 blockno; /* which su */ + u32 blockoff; /* offset into su */ + u64 stripeno; /* which stripe */ + u32 stripepos; /* which su in the stripe, + which object in the object set */ + u64 objsetno; /* which object set */ + u32 i = 0; + + if (!objlen) { + *file_extents = NULL; + *num_file_extents = 0; + return 0; + } + + *num_file_extents = DIV_ROUND_UP_ULL(objoff + objlen, l->stripe_unit) - + DIV_ROUND_DOWN_ULL(objoff, l->stripe_unit); + *file_extents = kmalloc_array(*num_file_extents, sizeof(**file_extents), + GFP_NOIO); + if (!*file_extents) + return -ENOMEM; + + div_u64_rem(objoff, l->stripe_unit, &blockoff); + while (objlen) { + u64 off, len; + + objsetno = div_u64_rem(objno, l->stripe_count, &stripepos); + stripeno = div_u64(objoff, l->stripe_unit) + + objsetno * stripes_per_object; + blockno = stripeno * l->stripe_count + stripepos; + off = blockno * l->stripe_unit + blockoff; + len = min_t(u64, objlen, l->stripe_unit - blockoff); + + (*file_extents)[i].fe_off = off; + (*file_extents)[i].fe_len = len; + + blockoff = 0; + objoff += len; + objlen -= len; + i++; + } + + BUG_ON(i != *num_file_extents); + return 0; +} +EXPORT_SYMBOL(ceph_extent_to_file); -- cgit v1.2.3-59-g8ed1b From 08c1ac508b6dc20ac866e7cdb7279245437c7d26 Mon Sep 17 00:00:00 2001 From: Ilya Dryomov Date: Sat, 17 Feb 2018 10:41:20 +0100 Subject: libceph, ceph: move ceph_calc_file_object_mapping() to striper.c ceph_calc_file_object_mapping() has nothing to do with osdmaps. Signed-off-by: Ilya Dryomov --- fs/ceph/addr.c | 1 + fs/ceph/ioctl.c | 2 +- include/linux/ceph/osdmap.h | 5 ----- include/linux/ceph/striper.h | 4 ++++ net/ceph/osd_client.c | 1 + net/ceph/osdmap.c | 37 ------------------------------------- net/ceph/striper.c | 37 ++++++++++++++++++++++++++++++++++++- 7 files changed, 43 insertions(+), 44 deletions(-) diff --git a/fs/ceph/addr.c b/fs/ceph/addr.c index c0fe1b6f47ac..c3557a9ea73d 100644 --- a/fs/ceph/addr.c +++ b/fs/ceph/addr.c @@ -15,6 +15,7 @@ #include "mds_client.h" #include "cache.h" #include +#include /* * Ceph address space ops. diff --git a/fs/ceph/ioctl.c b/fs/ceph/ioctl.c index b855d24a895a..c90f03beb15d 100644 --- a/fs/ceph/ioctl.c +++ b/fs/ceph/ioctl.c @@ -5,7 +5,7 @@ #include "super.h" #include "mds_client.h" #include "ioctl.h" - +#include /* * ioctls diff --git a/include/linux/ceph/osdmap.h b/include/linux/ceph/osdmap.h index 92314035dac1..e71fb222c7c3 100644 --- a/include/linux/ceph/osdmap.h +++ b/include/linux/ceph/osdmap.h @@ -5,7 +5,6 @@ #include #include #include -#include #include /* @@ -280,10 +279,6 @@ bool ceph_osds_changed(const struct ceph_osds *old_acting, const struct ceph_osds *new_acting, bool any_change); -void ceph_calc_file_object_mapping(struct ceph_file_layout *l, - u64 off, u64 len, - u64 *objno, u64 *objoff, u32 *xlen); - int __ceph_object_locator_to_pg(struct ceph_pg_pool_info *pi, const struct ceph_object_id *oid, const struct ceph_object_locator *oloc, diff --git a/include/linux/ceph/striper.h b/include/linux/ceph/striper.h index 74134ee5fdc8..cbd0d24b7148 100644 --- a/include/linux/ceph/striper.h +++ b/include/linux/ceph/striper.h @@ -7,6 +7,10 @@ struct ceph_file_layout; +void ceph_calc_file_object_mapping(struct ceph_file_layout *l, + u64 off, u64 len, + u64 *objno, u64 *objoff, u32 *xlen); + struct ceph_object_extent { struct list_head oe_item; u64 oe_objno; diff --git a/net/ceph/osd_client.c b/net/ceph/osd_client.c index 407be0533c18..4a3af96dc057 100644 --- a/net/ceph/osd_client.c +++ b/net/ceph/osd_client.c @@ -20,6 +20,7 @@ #include #include #include +#include #define OSD_OPREPLY_FRONT_LEN 512 diff --git a/net/ceph/osdmap.c b/net/ceph/osdmap.c index e3ebbe2ecdad..9645ffd6acfb 100644 --- a/net/ceph/osdmap.c +++ b/net/ceph/osdmap.c @@ -4,7 +4,6 @@ #include #include -#include #include #include @@ -2140,42 +2139,6 @@ bool ceph_osds_changed(const struct ceph_osds *old_acting, return false; } -/* - * Map a file extent to a stripe unit within an object. - * Fill in objno, offset into object, and object extent length (i.e. the - * number of bytes mapped, less than or equal to @l->stripe_unit). - * - * Example for stripe_count = 3, stripes_per_object = 4: - * - * blockno | 0 3 6 9 | 1 4 7 10 | 2 5 8 11 | 12 15 18 21 | 13 16 19 - * stripeno | 0 1 2 3 | 0 1 2 3 | 0 1 2 3 | 4 5 6 7 | 4 5 6 - * stripepos | 0 | 1 | 2 | 0 | 1 - * objno | 0 | 1 | 2 | 3 | 4 - * objsetno | 0 | 1 - */ -void ceph_calc_file_object_mapping(struct ceph_file_layout *l, - u64 off, u64 len, - u64 *objno, u64 *objoff, u32 *xlen) -{ - u32 stripes_per_object = l->object_size / l->stripe_unit; - u64 blockno; /* which su in the file (i.e. globally) */ - u32 blockoff; /* offset into su */ - u64 stripeno; /* which stripe */ - u32 stripepos; /* which su in the stripe, - which object in the object set */ - u64 objsetno; /* which object set */ - u32 objsetpos; /* which stripe in the object set */ - - blockno = div_u64_rem(off, l->stripe_unit, &blockoff); - stripeno = div_u64_rem(blockno, l->stripe_count, &stripepos); - objsetno = div_u64_rem(stripeno, stripes_per_object, &objsetpos); - - *objno = objsetno * l->stripe_count + stripepos; - *objoff = objsetpos * l->stripe_unit + blockoff; - *xlen = min_t(u64, len, l->stripe_unit - blockoff); -} -EXPORT_SYMBOL(ceph_calc_file_object_mapping); - /* * Map an object into a PG. * diff --git a/net/ceph/striper.c b/net/ceph/striper.c index bc1e4de30df9..c36462dc86b7 100644 --- a/net/ceph/striper.c +++ b/net/ceph/striper.c @@ -5,10 +5,45 @@ #include #include -#include #include #include +/* + * Map a file extent to a stripe unit within an object. + * Fill in objno, offset into object, and object extent length (i.e. the + * number of bytes mapped, less than or equal to @l->stripe_unit). + * + * Example for stripe_count = 3, stripes_per_object = 4: + * + * blockno | 0 3 6 9 | 1 4 7 10 | 2 5 8 11 | 12 15 18 21 | 13 16 19 + * stripeno | 0 1 2 3 | 0 1 2 3 | 0 1 2 3 | 4 5 6 7 | 4 5 6 + * stripepos | 0 | 1 | 2 | 0 | 1 + * objno | 0 | 1 | 2 | 3 | 4 + * objsetno | 0 | 1 + */ +void ceph_calc_file_object_mapping(struct ceph_file_layout *l, + u64 off, u64 len, + u64 *objno, u64 *objoff, u32 *xlen) +{ + u32 stripes_per_object = l->object_size / l->stripe_unit; + u64 blockno; /* which su in the file (i.e. globally) */ + u32 blockoff; /* offset into su */ + u64 stripeno; /* which stripe */ + u32 stripepos; /* which su in the stripe, + which object in the object set */ + u64 objsetno; /* which object set */ + u32 objsetpos; /* which stripe in the object set */ + + blockno = div_u64_rem(off, l->stripe_unit, &blockoff); + stripeno = div_u64_rem(blockno, l->stripe_count, &stripepos); + objsetno = div_u64_rem(stripeno, stripes_per_object, &objsetpos); + + *objno = objsetno * l->stripe_count + stripepos; + *objoff = objsetpos * l->stripe_unit + blockoff; + *xlen = min_t(u64, len, l->stripe_unit - blockoff); +} +EXPORT_SYMBOL(ceph_calc_file_object_mapping); + /* * Return the last extent with given objno (@object_extents is sorted * by objno). If not found, return NULL and set @add_pos so that the -- cgit v1.2.3-59-g8ed1b From 43df3d35c0a558e461a1d7b3f0b21f5c43a5955f Mon Sep 17 00:00:00 2001 From: Ilya Dryomov Date: Fri, 2 Feb 2018 15:23:22 +0100 Subject: rbd: incorporate ceph_object_extent obj_req->object_no -> obj_req->ex.oe_objno obj_req->offset -> obj_req->ex.oe_off obj_req->length -> obj_req->ex.oe_len ... and use ex for linking object requests to image requests. Signed-off-by: Ilya Dryomov --- drivers/block/rbd.c | 71 +++++++++++++++++++++++++---------------------------- 1 file changed, 34 insertions(+), 37 deletions(-) diff --git a/drivers/block/rbd.c b/drivers/block/rbd.c index 6ce9e0b35461..568e974dc746 100644 --- a/drivers/block/rbd.c +++ b/drivers/block/rbd.c @@ -32,6 +32,7 @@ #include #include #include +#include #include #include #include @@ -245,9 +246,7 @@ enum rbd_obj_write_state { }; struct rbd_obj_request { - u64 object_no; - u64 offset; /* object start byte */ - u64 length; /* bytes from offset */ + struct ceph_object_extent ex; union { bool tried_parent; /* for reads */ enum rbd_obj_write_state write_state; /* for writes */ @@ -255,8 +254,6 @@ struct rbd_obj_request { struct rbd_img_request *img_request; u64 img_offset; - /* links for img_request->obj_requests list */ - struct list_head links; union { struct ceph_bio_iter bio_pos; @@ -300,17 +297,17 @@ struct rbd_img_request { u64 xferred;/* aggregate bytes transferred */ int result; /* first nonzero obj_request result */ + struct list_head object_extents; /* obj_req.ex structs */ u32 obj_request_count; u32 pending_count; - struct list_head obj_requests; /* rbd_obj_request structs */ struct kref kref; }; #define for_each_obj_request(ireq, oreq) \ - list_for_each_entry(oreq, &(ireq)->obj_requests, links) + list_for_each_entry(oreq, &(ireq)->object_extents, ex.oe_item) #define for_each_obj_request_safe(ireq, oreq, n) \ - list_for_each_entry_safe_reverse(oreq, n, &(ireq)->obj_requests, links) + list_for_each_entry_safe(oreq, n, &(ireq)->object_extents, ex.oe_item) enum rbd_watch_state { RBD_WATCH_STATE_UNREGISTERED, @@ -1336,7 +1333,7 @@ static inline void rbd_img_obj_request_add(struct rbd_img_request *img_request, obj_request->img_request = img_request; img_request->obj_request_count++; img_request->pending_count++; - list_add_tail(&obj_request->links, &img_request->obj_requests); + list_add_tail(&obj_request->ex.oe_item, &img_request->object_extents); dout("%s: img %p obj %p\n", __func__, img_request, obj_request); } @@ -1344,7 +1341,7 @@ static inline void rbd_img_obj_request_del(struct rbd_img_request *img_request, struct rbd_obj_request *obj_request) { dout("%s: img %p obj %p\n", __func__, img_request, obj_request); - list_del(&obj_request->links); + list_del(&obj_request->ex.oe_item); rbd_assert(img_request->obj_request_count > 0); img_request->obj_request_count--; rbd_assert(obj_request->img_request == img_request); @@ -1356,8 +1353,8 @@ static void rbd_obj_request_submit(struct rbd_obj_request *obj_request) struct ceph_osd_request *osd_req = obj_request->osd_req; dout("%s %p object_no %016llx %llu~%llu osd_req %p\n", __func__, - obj_request, obj_request->object_no, obj_request->offset, - obj_request->length, osd_req); + obj_request, obj_request->ex.oe_objno, obj_request->ex.oe_off, + obj_request->ex.oe_len, osd_req); ceph_osdc_start_request(osd_req->r_osdc, osd_req, false); } @@ -1406,15 +1403,15 @@ static bool rbd_obj_is_entire(struct rbd_obj_request *obj_req) { struct rbd_device *rbd_dev = obj_req->img_request->rbd_dev; - return !obj_req->offset && - obj_req->length == rbd_dev->layout.object_size; + return !obj_req->ex.oe_off && + obj_req->ex.oe_len == rbd_dev->layout.object_size; } static bool rbd_obj_is_tail(struct rbd_obj_request *obj_req) { struct rbd_device *rbd_dev = obj_req->img_request->rbd_dev; - return obj_req->offset + obj_req->length == + return obj_req->ex.oe_off + obj_req->ex.oe_len == rbd_dev->layout.object_size; } @@ -1469,7 +1466,7 @@ static void rbd_osd_req_format_write(struct rbd_obj_request *obj_request) osd_req->r_flags = CEPH_OSD_FLAG_WRITE; ktime_get_real_ts(&osd_req->r_mtime); - osd_req->r_data_offset = obj_request->offset; + osd_req->r_data_offset = obj_request->ex.oe_off; } static struct ceph_osd_request * @@ -1493,7 +1490,7 @@ rbd_osd_req_create(struct rbd_obj_request *obj_req, unsigned int num_ops) req->r_base_oloc.pool = rbd_dev->layout.pool_id; if (ceph_oid_aprintf(&req->r_base_oid, GFP_NOIO, name_format, - rbd_dev->header.object_prefix, obj_req->object_no)) + rbd_dev->header.object_prefix, obj_req->ex.oe_objno)) goto err_req; if (ceph_osdc_alloc_messages(req, GFP_NOIO)) @@ -1519,7 +1516,7 @@ static struct rbd_obj_request *rbd_obj_request_create(void) if (!obj_request) return NULL; - INIT_LIST_HEAD(&obj_request->links); + ceph_object_extent_init(&obj_request->ex); kref_init(&obj_request->kref); dout("%s %p\n", __func__, obj_request); @@ -1650,7 +1647,7 @@ static struct rbd_img_request *rbd_img_request_create( img_request_layered_set(img_request); spin_lock_init(&img_request->completion_lock); - INIT_LIST_HEAD(&img_request->obj_requests); + INIT_LIST_HEAD(&img_request->object_extents); kref_init(&img_request->kref); dout("%s: rbd_dev %p %s %llu/%llu -> img %p\n", __func__, rbd_dev, @@ -1727,11 +1724,11 @@ static void rbd_osd_req_setup_data(struct rbd_obj_request *obj_req, u32 which) case OBJ_REQUEST_BIO: osd_req_op_extent_osd_data_bio(obj_req->osd_req, which, &obj_req->bio_pos, - obj_req->length); + obj_req->ex.oe_len); break; case OBJ_REQUEST_BVECS: rbd_assert(obj_req->bvec_pos.iter.bi_size == - obj_req->length); + obj_req->ex.oe_len); osd_req_op_extent_osd_data_bvec_pos(obj_req->osd_req, which, &obj_req->bvec_pos); break; @@ -1747,7 +1744,7 @@ static int rbd_obj_setup_read(struct rbd_obj_request *obj_req) return -ENOMEM; osd_req_op_extent_init(obj_req->osd_req, 0, CEPH_OSD_OP_READ, - obj_req->offset, obj_req->length, 0, 0); + obj_req->ex.oe_off, obj_req->ex.oe_len, 0, 0); rbd_osd_req_setup_data(obj_req, 0); rbd_osd_req_format_read(obj_req); @@ -1794,7 +1791,7 @@ static void __rbd_obj_setup_write(struct rbd_obj_request *obj_req, opcode = CEPH_OSD_OP_WRITE; osd_req_op_extent_init(obj_req->osd_req, which, opcode, - obj_req->offset, obj_req->length, 0, 0); + obj_req->ex.oe_off, obj_req->ex.oe_len, 0, 0); rbd_osd_req_setup_data(obj_req, which++); rbd_assert(which == obj_req->osd_req->r_num_ops); @@ -1849,7 +1846,7 @@ static void __rbd_obj_setup_discard(struct rbd_obj_request *obj_req, if (opcode) osd_req_op_extent_init(obj_req->osd_req, which++, opcode, - obj_req->offset, obj_req->length, + obj_req->ex.oe_off, obj_req->ex.oe_len, 0, 0); rbd_assert(which == obj_req->osd_req->r_num_ops); @@ -1964,9 +1961,9 @@ static int rbd_img_request_fill(struct rbd_img_request *img_request, if (!obj_request) goto out_unwind; - obj_request->object_no = object_no; - obj_request->offset = offset; - obj_request->length = length; + obj_request->ex.oe_objno = object_no; + obj_request->ex.oe_off = offset; + obj_request->ex.oe_len = length; /* * set obj_request->img_request before creating the @@ -2064,7 +2061,7 @@ static bool rbd_obj_handle_read(struct rbd_obj_request *obj_req) if (obj_req->result == -ENOENT && obj_req->img_offset < rbd_dev->parent_overlap && !obj_req->tried_parent) { - u64 obj_overlap = min(obj_req->length, + u64 obj_overlap = min(obj_req->ex.oe_len, rbd_dev->parent_overlap - obj_req->img_offset); obj_req->tried_parent = true; @@ -2084,12 +2081,12 @@ static bool rbd_obj_handle_read(struct rbd_obj_request *obj_req) * count to indicate the whole request was satisfied. */ if (obj_req->result == -ENOENT || - (!obj_req->result && obj_req->xferred < obj_req->length)) { + (!obj_req->result && obj_req->xferred < obj_req->ex.oe_len)) { rbd_assert(!obj_req->xferred || !obj_req->result); rbd_obj_zero_range(obj_req, obj_req->xferred, - obj_req->length - obj_req->xferred); + obj_req->ex.oe_len - obj_req->xferred); obj_req->result = 0; - obj_req->xferred = obj_req->length; + obj_req->xferred = obj_req->ex.oe_len; } return true; @@ -2214,7 +2211,7 @@ static int rbd_obj_handle_write_guard(struct rbd_obj_request *obj_req) * Determine the byte range covered by the object in the * child image to which the original request was to be sent. */ - img_offset = obj_req->img_offset - obj_req->offset; + img_offset = obj_req->img_offset - obj_req->ex.oe_off; obj_overlap = rbd_dev->layout.object_size; /* @@ -2263,7 +2260,7 @@ again: * There is no such thing as a successful short * write -- indicate the whole request was satisfied. */ - obj_req->xferred = obj_req->length; + obj_req->xferred = obj_req->ex.oe_len; return true; case RBD_OBJ_WRITE_COPYUP: obj_req->write_state = RBD_OBJ_WRITE_GUARD; @@ -2300,7 +2297,7 @@ static bool __rbd_obj_handle_request(struct rbd_obj_request *obj_req) */ if (obj_req->result == -ENOENT) { obj_req->result = 0; - obj_req->xferred = obj_req->length; + obj_req->xferred = obj_req->ex.oe_len; } return true; } @@ -2315,7 +2312,7 @@ static void rbd_obj_end_request(struct rbd_obj_request *obj_req) struct rbd_img_request *img_req = obj_req->img_request; rbd_assert((!obj_req->result && - obj_req->xferred == obj_req->length) || + obj_req->xferred == obj_req->ex.oe_len) || (obj_req->result < 0 && !obj_req->xferred)); if (!obj_req->result) { img_req->xferred += obj_req->xferred; @@ -2324,8 +2321,8 @@ static void rbd_obj_end_request(struct rbd_obj_request *obj_req) rbd_warn(img_req->rbd_dev, "%s at objno %llu %llu~%llu result %d xferred %llu", - obj_op_name(img_req->op_type), obj_req->object_no, - obj_req->offset, obj_req->length, obj_req->result, + obj_op_name(img_req->op_type), obj_req->ex.oe_objno, + obj_req->ex.oe_off, obj_req->ex.oe_len, obj_req->result, obj_req->xferred); if (!img_req->result) { img_req->result = obj_req->result; -- cgit v1.2.3-59-g8ed1b From 86bd7998fa2c1b18fda74cfa4674cfb49ae701c7 Mon Sep 17 00:00:00 2001 From: Ilya Dryomov Date: Tue, 6 Feb 2018 19:26:33 +0100 Subject: rbd: move to obj_req->img_extents In preparation for rbd "fancy" striping, replace obj_req->img_offset with obj_req->img_extents. A single starting offset isn't sufficient because we want only one OSD request per object and will merge adjacent object extents in ceph_file_to_extents(). The final object extent may map into multiple different byte ranges in the image. Signed-off-by: Ilya Dryomov --- drivers/block/rbd.c | 150 ++++++++++++++++++++++++++++++++++------------------ 1 file changed, 98 insertions(+), 52 deletions(-) diff --git a/drivers/block/rbd.c b/drivers/block/rbd.c index 568e974dc746..0aa95e08664d 100644 --- a/drivers/block/rbd.c +++ b/drivers/block/rbd.c @@ -253,7 +253,8 @@ struct rbd_obj_request { }; struct rbd_img_request *img_request; - u64 img_offset; + struct ceph_file_extent *img_extents; + u32 num_img_extents; union { struct ceph_bio_iter bio_pos; @@ -1279,14 +1280,6 @@ static void rbd_obj_zero_range(struct rbd_obj_request *obj_req, u32 off, } } -static bool obj_request_overlaps_parent(struct rbd_obj_request *obj_request) -{ - struct rbd_device *rbd_dev = obj_request->img_request->rbd_dev; - - return obj_request->img_offset < - round_up(rbd_dev->parent_overlap, rbd_obj_bytes(&rbd_dev->header)); -} - static void rbd_obj_request_get(struct rbd_obj_request *obj_request) { dout("%s: obj %p (was %d)\n", __func__, obj_request, @@ -1415,6 +1408,12 @@ static bool rbd_obj_is_tail(struct rbd_obj_request *obj_req) rbd_dev->layout.object_size; } +static u64 rbd_obj_img_extents_bytes(struct rbd_obj_request *obj_req) +{ + return ceph_file_extents_bytes(obj_req->img_extents, + obj_req->num_img_extents); +} + static bool rbd_img_is_write(struct rbd_img_request *img_req) { switch (img_req->op_type) { @@ -1544,6 +1543,7 @@ static void rbd_obj_request_destroy(struct kref *kref) rbd_assert(0); } + kfree(obj_request->img_extents); if (obj_request->copyup_bvecs) { for (i = 0; i < obj_request->copyup_bvec_count; i++) { if (obj_request->copyup_bvecs[i].bv_page) @@ -1718,6 +1718,53 @@ static void rbd_parent_request_destroy(struct kref *kref) rbd_img_request_destroy(kref); } +static void prune_extents(struct ceph_file_extent *img_extents, + u32 *num_img_extents, u64 overlap) +{ + u32 cnt = *num_img_extents; + + /* drop extents completely beyond the overlap */ + while (cnt && img_extents[cnt - 1].fe_off >= overlap) + cnt--; + + if (cnt) { + struct ceph_file_extent *ex = &img_extents[cnt - 1]; + + /* trim final overlapping extent */ + if (ex->fe_off + ex->fe_len > overlap) + ex->fe_len = overlap - ex->fe_off; + } + + *num_img_extents = cnt; +} + +/* + * Determine the byte range(s) covered by either just the object extent + * or the entire object in the parent image. + */ +static int rbd_obj_calc_img_extents(struct rbd_obj_request *obj_req, + bool entire) +{ + struct rbd_device *rbd_dev = obj_req->img_request->rbd_dev; + int ret; + + if (!rbd_dev->parent_overlap) + return 0; + + ret = ceph_extent_to_file(&rbd_dev->layout, obj_req->ex.oe_objno, + entire ? 0 : obj_req->ex.oe_off, + entire ? rbd_dev->layout.object_size : + obj_req->ex.oe_len, + &obj_req->img_extents, + &obj_req->num_img_extents); + if (ret) + return ret; + + prune_extents(obj_req->img_extents, &obj_req->num_img_extents, + rbd_dev->parent_overlap); + return 0; +} + static void rbd_osd_req_setup_data(struct rbd_obj_request *obj_req, u32 which) { switch (obj_req->img_request->data_type) { @@ -1803,7 +1850,12 @@ static int rbd_obj_setup_write(struct rbd_obj_request *obj_req) unsigned int num_osd_ops, which = 0; int ret; - if (obj_request_overlaps_parent(obj_req)) { + /* reverse map the entire object onto the parent */ + ret = rbd_obj_calc_img_extents(obj_req, true); + if (ret) + return ret; + + if (obj_req->num_img_extents) { obj_req->write_state = RBD_OBJ_WRITE_GUARD; num_osd_ops = 3; /* stat + setallochint + write/writefull */ } else { @@ -1815,7 +1867,7 @@ static int rbd_obj_setup_write(struct rbd_obj_request *obj_req) if (!obj_req->osd_req) return -ENOMEM; - if (obj_request_overlaps_parent(obj_req)) { + if (obj_req->num_img_extents) { ret = __rbd_obj_setup_stat(obj_req, which++); if (ret) return ret; @@ -1831,7 +1883,7 @@ static void __rbd_obj_setup_discard(struct rbd_obj_request *obj_req, u16 opcode; if (rbd_obj_is_entire(obj_req)) { - if (obj_request_overlaps_parent(obj_req)) { + if (obj_req->num_img_extents) { opcode = CEPH_OSD_OP_TRUNCATE; } else { osd_req_op_init(obj_req->osd_req, which++, @@ -1858,11 +1910,16 @@ static int rbd_obj_setup_discard(struct rbd_obj_request *obj_req) unsigned int num_osd_ops, which = 0; int ret; + /* reverse map the entire object onto the parent */ + ret = rbd_obj_calc_img_extents(obj_req, true); + if (ret) + return ret; + if (rbd_obj_is_entire(obj_req)) { obj_req->write_state = RBD_OBJ_WRITE_FLAT; num_osd_ops = 1; /* truncate/delete */ } else { - if (obj_request_overlaps_parent(obj_req)) { + if (obj_req->num_img_extents) { obj_req->write_state = RBD_OBJ_WRITE_GUARD; num_osd_ops = 2; /* stat + truncate/zero */ } else { @@ -1875,8 +1932,7 @@ static int rbd_obj_setup_discard(struct rbd_obj_request *obj_req) if (!obj_req->osd_req) return -ENOMEM; - if (!rbd_obj_is_entire(obj_req) && - obj_request_overlaps_parent(obj_req)) { + if (!rbd_obj_is_entire(obj_req) && obj_req->num_img_extents) { ret = __rbd_obj_setup_stat(obj_req, which++); if (ret) return ret; @@ -1980,8 +2036,6 @@ static int rbd_img_request_fill(struct rbd_img_request *img_request, ceph_bvec_iter_advance(&bvec_it, length); } - obj_request->img_offset = img_offset; - img_offset += length; resid -= length; } @@ -2009,14 +2063,15 @@ static void rbd_img_request_submit(struct rbd_img_request *img_request) rbd_img_request_put(img_request); } -static int rbd_obj_read_from_parent(struct rbd_obj_request *obj_req, - u64 img_offset, u32 bytes) +static int rbd_obj_read_from_parent(struct rbd_obj_request *obj_req) { struct rbd_img_request *img_req = obj_req->img_request; struct rbd_img_request *child_img_req; int ret; - child_img_req = rbd_parent_request_create(obj_req, img_offset, bytes); + child_img_req = rbd_parent_request_create(obj_req, + obj_req->img_extents[0].fe_off, + obj_req->img_extents[0].fe_len); if (!child_img_req) return -ENOMEM; @@ -2038,7 +2093,7 @@ static int rbd_obj_read_from_parent(struct rbd_obj_request *obj_req, } else { struct ceph_bvec_iter it = { .bvecs = obj_req->copyup_bvecs, - .iter = { .bi_size = bytes }, + .iter = { .bi_size = obj_req->img_extents[0].fe_len }, }; ret = rbd_img_request_fill(child_img_req, OBJ_REQUEST_BVECS, @@ -2059,19 +2114,23 @@ static bool rbd_obj_handle_read(struct rbd_obj_request *obj_req) int ret; if (obj_req->result == -ENOENT && - obj_req->img_offset < rbd_dev->parent_overlap && - !obj_req->tried_parent) { - u64 obj_overlap = min(obj_req->ex.oe_len, - rbd_dev->parent_overlap - obj_req->img_offset); - - obj_req->tried_parent = true; - ret = rbd_obj_read_from_parent(obj_req, obj_req->img_offset, - obj_overlap); + rbd_dev->parent_overlap && !obj_req->tried_parent) { + /* reverse map this object extent onto the parent */ + ret = rbd_obj_calc_img_extents(obj_req, false); if (ret) { obj_req->result = ret; return true; } - return false; + + if (obj_req->num_img_extents) { + obj_req->tried_parent = true; + ret = rbd_obj_read_from_parent(obj_req); + if (ret) { + obj_req->result = ret; + return true; + } + return false; + } } /* @@ -2189,11 +2248,12 @@ static int setup_copyup_bvecs(struct rbd_obj_request *obj_req, u64 obj_overlap) static int rbd_obj_handle_write_guard(struct rbd_obj_request *obj_req) { struct rbd_device *rbd_dev = obj_req->img_request->rbd_dev; - u64 img_offset; - u64 obj_overlap; int ret; - if (!obj_request_overlaps_parent(obj_req)) { + rbd_assert(obj_req->num_img_extents); + prune_extents(obj_req->img_extents, &obj_req->num_img_extents, + rbd_dev->parent_overlap); + if (!obj_req->num_img_extents) { /* * The overlap has become 0 (most likely because the * image has been flattened). Use rbd_obj_issue_copyup() @@ -2207,29 +2267,12 @@ static int rbd_obj_handle_write_guard(struct rbd_obj_request *obj_req) return rbd_obj_issue_copyup(obj_req, 0); } - /* - * Determine the byte range covered by the object in the - * child image to which the original request was to be sent. - */ - img_offset = obj_req->img_offset - obj_req->ex.oe_off; - obj_overlap = rbd_dev->layout.object_size; - - /* - * There is no defined parent data beyond the parent - * overlap, so limit what we read at that boundary if - * necessary. - */ - if (img_offset + obj_overlap > rbd_dev->parent_overlap) { - rbd_assert(img_offset < rbd_dev->parent_overlap); - obj_overlap = rbd_dev->parent_overlap - img_offset; - } - - ret = setup_copyup_bvecs(obj_req, obj_overlap); + ret = setup_copyup_bvecs(obj_req, rbd_obj_img_extents_bytes(obj_req)); if (ret) return ret; obj_req->write_state = RBD_OBJ_WRITE_COPYUP; - return rbd_obj_read_from_parent(obj_req, img_offset, obj_overlap); + return rbd_obj_read_from_parent(obj_req); } static bool rbd_obj_handle_write(struct rbd_obj_request *obj_req) @@ -2335,6 +2378,9 @@ static void rbd_img_end_child_request(struct rbd_img_request *img_req) struct rbd_obj_request *obj_req = img_req->obj_request; rbd_assert(test_bit(IMG_REQ_CHILD, &img_req->flags)); + rbd_assert((!img_req->result && + img_req->xferred == rbd_obj_img_extents_bytes(obj_req)) || + (img_req->result < 0 && !img_req->xferred)); obj_req->result = img_req->result; obj_req->xferred = img_req->xferred; -- cgit v1.2.3-59-g8ed1b From 2bb1e56ec6450ce533c644c5bfa548dc34c551a0 Mon Sep 17 00:00:00 2001 From: Ilya Dryomov Date: Tue, 6 Feb 2018 19:26:34 +0100 Subject: rbd: create+truncate for whole-object layered discards A whole-object layered discard is implemented as a truncate rather than a delete: a dummy object is needed to prevent the CoW machinery from kicking in. However, a truncate on a non-existent object is a no-op. If the object doesn't exist in HEAD, a discard request is effectively ignored, which violates our "discard zeroes data" promise and breaks REQ_OP_WRITE_ZEROES implementation. A non-exclusive create on an existing object is also a no-op, so the fix is to do a compound create+truncate instead. Signed-off-by: Ilya Dryomov --- drivers/block/rbd.c | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-) diff --git a/drivers/block/rbd.c b/drivers/block/rbd.c index 0aa95e08664d..fc94e2c45e28 100644 --- a/drivers/block/rbd.c +++ b/drivers/block/rbd.c @@ -1884,6 +1884,8 @@ static void __rbd_obj_setup_discard(struct rbd_obj_request *obj_req, if (rbd_obj_is_entire(obj_req)) { if (obj_req->num_img_extents) { + osd_req_op_init(obj_req->osd_req, which++, + CEPH_OSD_OP_CREATE, 0); opcode = CEPH_OSD_OP_TRUNCATE; } else { osd_req_op_init(obj_req->osd_req, which++, @@ -1917,7 +1919,10 @@ static int rbd_obj_setup_discard(struct rbd_obj_request *obj_req) if (rbd_obj_is_entire(obj_req)) { obj_req->write_state = RBD_OBJ_WRITE_FLAT; - num_osd_ops = 1; /* truncate/delete */ + if (obj_req->num_img_extents) + num_osd_ops = 2; /* create + truncate */ + else + num_osd_ops = 1; /* delete */ } else { if (obj_req->num_img_extents) { obj_req->write_state = RBD_OBJ_WRITE_GUARD; -- cgit v1.2.3-59-g8ed1b From 5a237819aa4e0421a17966e9baf91b9caedaf61d Mon Sep 17 00:00:00 2001 From: Ilya Dryomov Date: Tue, 6 Feb 2018 19:26:34 +0100 Subject: rbd: switch to common striping framework Signed-off-by: Ilya Dryomov --- drivers/block/rbd.c | 191 +++++++++++++++++++++++++++++++++++++++++++++------- 1 file changed, 168 insertions(+), 23 deletions(-) diff --git a/drivers/block/rbd.c b/drivers/block/rbd.c index fc94e2c45e28..24f169f33219 100644 --- a/drivers/block/rbd.c +++ b/drivers/block/rbd.c @@ -1326,7 +1326,6 @@ static inline void rbd_img_obj_request_add(struct rbd_img_request *img_request, obj_request->img_request = img_request; img_request->obj_request_count++; img_request->pending_count++; - list_add_tail(&obj_request->ex.oe_item, &img_request->object_extents); dout("%s: img %p obj %p\n", __func__, img_request, obj_request); } @@ -2055,6 +2054,158 @@ out_unwind: return -ENOMEM; } +union rbd_img_fill_iter { + struct ceph_bio_iter bio_iter; + struct ceph_bvec_iter bvec_iter; +}; + +struct rbd_img_fill_ctx { + enum obj_request_type pos_type; + union rbd_img_fill_iter *pos; + union rbd_img_fill_iter iter; + ceph_object_extent_fn_t set_pos_fn; +}; + +static struct ceph_object_extent *alloc_object_extent(void *arg) +{ + struct rbd_img_request *img_req = arg; + struct rbd_obj_request *obj_req; + + obj_req = rbd_obj_request_create(); + if (!obj_req) + return NULL; + + rbd_img_obj_request_add(img_req, obj_req); + return &obj_req->ex; +} + +/* + * Map a list of image extents to a list of object extents, create the + * corresponding object requests (normally each to a different object, + * but not always) and add them to @img_req. For each object request, + * set up its data descriptor to point to the corresponding chunk of + * @fctx->pos data buffer. + * + * @fctx->pos data buffer is assumed to be large enough. + */ +static int rbd_img_fill_request(struct rbd_img_request *img_req, + struct ceph_file_extent *img_extents, + u32 num_img_extents, + struct rbd_img_fill_ctx *fctx) +{ + u32 i; + int ret; + + img_req->data_type = fctx->pos_type; + + /* + * Create object requests and set each object request's starting + * position in the provided bio (list) or bio_vec array. + */ + fctx->iter = *fctx->pos; + for (i = 0; i < num_img_extents; i++) { + ret = ceph_file_to_extents(&img_req->rbd_dev->layout, + img_extents[i].fe_off, + img_extents[i].fe_len, + &img_req->object_extents, + alloc_object_extent, img_req, + fctx->set_pos_fn, &fctx->iter); + if (ret) + return ret; + } + + return __rbd_img_fill_request(img_req); +} + +static int rbd_img_fill_nodata(struct rbd_img_request *img_req, + u64 off, u64 len) +{ + struct ceph_file_extent ex = { off, len }; + union rbd_img_fill_iter dummy; + struct rbd_img_fill_ctx fctx = { + .pos_type = OBJ_REQUEST_NODATA, + .pos = &dummy, + }; + + return rbd_img_fill_request(img_req, &ex, 1, &fctx); +} + +static void set_bio_pos(struct ceph_object_extent *ex, u32 bytes, void *arg) +{ + struct rbd_obj_request *obj_req = + container_of(ex, struct rbd_obj_request, ex); + struct ceph_bio_iter *it = arg; + + dout("%s objno %llu bytes %u\n", __func__, ex->oe_objno, bytes); + obj_req->bio_pos = *it; + ceph_bio_iter_advance(it, bytes); +} + +static int __rbd_img_fill_from_bio(struct rbd_img_request *img_req, + struct ceph_file_extent *img_extents, + u32 num_img_extents, + struct ceph_bio_iter *bio_pos) +{ + struct rbd_img_fill_ctx fctx = { + .pos_type = OBJ_REQUEST_BIO, + .pos = (union rbd_img_fill_iter *)bio_pos, + .set_pos_fn = set_bio_pos, + }; + + return rbd_img_fill_request(img_req, img_extents, num_img_extents, + &fctx); +} + +static int rbd_img_fill_from_bio(struct rbd_img_request *img_req, + u64 off, u64 len, struct bio *bio) +{ + struct ceph_file_extent ex = { off, len }; + struct ceph_bio_iter it = { .bio = bio, .iter = bio->bi_iter }; + + return __rbd_img_fill_from_bio(img_req, &ex, 1, &it); +} + +static void set_bvec_pos(struct ceph_object_extent *ex, u32 bytes, void *arg) +{ + struct rbd_obj_request *obj_req = + container_of(ex, struct rbd_obj_request, ex); + struct ceph_bvec_iter *it = arg; + + obj_req->bvec_pos = *it; + ceph_bvec_iter_shorten(&obj_req->bvec_pos, bytes); + ceph_bvec_iter_advance(it, bytes); +} + +static int __rbd_img_fill_from_bvecs(struct rbd_img_request *img_req, + struct ceph_file_extent *img_extents, + u32 num_img_extents, + struct ceph_bvec_iter *bvec_pos) +{ + struct rbd_img_fill_ctx fctx = { + .pos_type = OBJ_REQUEST_BVECS, + .pos = (union rbd_img_fill_iter *)bvec_pos, + .set_pos_fn = set_bvec_pos, + }; + + return rbd_img_fill_request(img_req, img_extents, num_img_extents, + &fctx); +} + +static int rbd_img_fill_from_bvecs(struct rbd_img_request *img_req, + struct ceph_file_extent *img_extents, + u32 num_img_extents, + struct bio_vec *bvecs) +{ + struct ceph_bvec_iter it = { + .bvecs = bvecs, + .iter = { .bi_size = ceph_file_extents_bytes(img_extents, + num_img_extents) }, + }; + + return __rbd_img_fill_from_bvecs(img_req, img_extents, num_img_extents, + &it); +} + static void rbd_img_request_submit(struct rbd_img_request *img_request) { struct rbd_obj_request *obj_request; @@ -2083,26 +2234,25 @@ static int rbd_obj_read_from_parent(struct rbd_obj_request *obj_req) if (!rbd_img_is_write(img_req)) { switch (img_req->data_type) { case OBJ_REQUEST_BIO: - ret = rbd_img_request_fill(child_img_req, - OBJ_REQUEST_BIO, - &obj_req->bio_pos); + ret = __rbd_img_fill_from_bio(child_img_req, + obj_req->img_extents, + obj_req->num_img_extents, + &obj_req->bio_pos); break; case OBJ_REQUEST_BVECS: - ret = rbd_img_request_fill(child_img_req, - OBJ_REQUEST_BVECS, - &obj_req->bvec_pos); + ret = __rbd_img_fill_from_bvecs(child_img_req, + obj_req->img_extents, + obj_req->num_img_extents, + &obj_req->bvec_pos); break; default: rbd_assert(0); } } else { - struct ceph_bvec_iter it = { - .bvecs = obj_req->copyup_bvecs, - .iter = { .bi_size = obj_req->img_extents[0].fe_len }, - }; - - ret = rbd_img_request_fill(child_img_req, OBJ_REQUEST_BVECS, - &it); + ret = rbd_img_fill_from_bvecs(child_img_req, + obj_req->img_extents, + obj_req->num_img_extents, + obj_req->copyup_bvecs); } if (ret) { rbd_img_request_put(child_img_req); @@ -3520,15 +3670,10 @@ static void rbd_queue_workfn(struct work_struct *work) snapc = NULL; /* img_request consumes a ref */ if (op_type == OBJ_OP_DISCARD) - result = rbd_img_request_fill(img_request, OBJ_REQUEST_NODATA, - NULL); - else { - struct ceph_bio_iter bio_it = { .bio = rq->bio, - .iter = rq->bio->bi_iter }; - - result = rbd_img_request_fill(img_request, OBJ_REQUEST_BIO, - &bio_it); - } + result = rbd_img_fill_nodata(img_request, offset, length); + else + result = rbd_img_fill_from_bio(img_request, offset, length, + rq->bio); if (result) goto err_img_request; -- cgit v1.2.3-59-g8ed1b From 0420c5dd2ef308b69a86b44a217390f5612bab58 Mon Sep 17 00:00:00 2001 From: Ilya Dryomov Date: Tue, 6 Feb 2018 19:26:34 +0100 Subject: rbd: remove rbd_img_request_fill() and helpers Signed-off-by: Ilya Dryomov --- drivers/block/rbd.c | 98 ----------------------------------------------------- 1 file changed, 98 deletions(-) diff --git a/drivers/block/rbd.c b/drivers/block/rbd.c index 24f169f33219..a22d265b30df 100644 --- a/drivers/block/rbd.c +++ b/drivers/block/rbd.c @@ -1207,27 +1207,6 @@ static void rbd_dev_mapping_clear(struct rbd_device *rbd_dev) rbd_dev->mapping.features = 0; } -static u64 rbd_segment_offset(struct rbd_device *rbd_dev, u64 offset) -{ - u64 segment_size = rbd_obj_bytes(&rbd_dev->header); - - return offset & (segment_size - 1); -} - -static u64 rbd_segment_length(struct rbd_device *rbd_dev, - u64 offset, u64 length) -{ - u64 segment_size = rbd_obj_bytes(&rbd_dev->header); - - offset &= segment_size - 1; - - rbd_assert(length <= U64_MAX - offset); - if (offset + length > segment_size) - length = segment_size - offset; - - return length; -} - static void zero_bvec(struct bio_vec *bv) { void *buf; @@ -1977,83 +1956,6 @@ static int __rbd_img_fill_request(struct rbd_img_request *img_req) return 0; } -/* - * Split up an image request into one or more object requests, each - * to a different object. The "type" parameter indicates whether - * "data_desc" is the pointer to the head of a list of bio - * structures, or the base of a page array. In either case this - * function assumes data_desc describes memory sufficient to hold - * all data described by the image request. - */ -static int rbd_img_request_fill(struct rbd_img_request *img_request, - enum obj_request_type type, - void *data_desc) -{ - struct rbd_device *rbd_dev = img_request->rbd_dev; - struct rbd_obj_request *obj_request = NULL; - struct rbd_obj_request *next_obj_request; - struct ceph_bio_iter bio_it; - struct ceph_bvec_iter bvec_it; - u64 img_offset; - u64 resid; - - dout("%s: img %p type %d data_desc %p\n", __func__, img_request, - (int)type, data_desc); - - img_offset = img_request->offset; - resid = img_request->length; - rbd_assert(resid > 0); - - if (type == OBJ_REQUEST_BIO) { - bio_it = *(struct ceph_bio_iter *)data_desc; - rbd_assert(img_offset == - bio_it.iter.bi_sector << SECTOR_SHIFT); - } else if (type == OBJ_REQUEST_BVECS) { - bvec_it = *(struct ceph_bvec_iter *)data_desc; - } - - while (resid) { - u64 object_no = img_offset >> rbd_dev->header.obj_order; - u64 offset = rbd_segment_offset(rbd_dev, img_offset); - u64 length = rbd_segment_length(rbd_dev, img_offset, resid); - - obj_request = rbd_obj_request_create(); - if (!obj_request) - goto out_unwind; - - obj_request->ex.oe_objno = object_no; - obj_request->ex.oe_off = offset; - obj_request->ex.oe_len = length; - - /* - * set obj_request->img_request before creating the - * osd_request so that it gets the right snapc - */ - rbd_img_obj_request_add(img_request, obj_request); - - if (type == OBJ_REQUEST_BIO) { - obj_request->bio_pos = bio_it; - ceph_bio_iter_advance(&bio_it, length); - } else if (type == OBJ_REQUEST_BVECS) { - obj_request->bvec_pos = bvec_it; - ceph_bvec_iter_shorten(&obj_request->bvec_pos, length); - ceph_bvec_iter_advance(&bvec_it, length); - } - - img_offset += length; - resid -= length; - } - - img_request->data_type = type; - return __rbd_img_fill_request(img_request); - -out_unwind: - for_each_obj_request_safe(img_request, obj_request, next_obj_request) - rbd_img_obj_request_del(img_request, obj_request); - - return -ENOMEM; -} - union rbd_img_fill_iter { struct ceph_bio_iter bio_iter; struct ceph_bvec_iter bvec_iter; -- cgit v1.2.3-59-g8ed1b From dfd9875f11008183c26fea5fdf23e6740fe8aa5a Mon Sep 17 00:00:00 2001 From: Ilya Dryomov Date: Tue, 6 Feb 2018 19:26:35 +0100 Subject: rbd: get rid of img_req->{offset,length} These are set, but no longer used. Signed-off-by: Ilya Dryomov --- drivers/block/rbd.c | 26 ++++++++------------------ 1 file changed, 8 insertions(+), 18 deletions(-) diff --git a/drivers/block/rbd.c b/drivers/block/rbd.c index a22d265b30df..b3e310a87fd1 100644 --- a/drivers/block/rbd.c +++ b/drivers/block/rbd.c @@ -283,8 +283,6 @@ struct rbd_img_request { struct rbd_device *rbd_dev; enum obj_operation_type op_type; enum obj_request_type data_type; - u64 offset; /* starting image byte offset */ - u64 length; /* byte count from offset */ unsigned long flags; union { u64 snap_id; /* for reads */ @@ -1602,7 +1600,6 @@ static bool rbd_dev_parent_get(struct rbd_device *rbd_dev) */ static struct rbd_img_request *rbd_img_request_create( struct rbd_device *rbd_dev, - u64 offset, u64 length, enum obj_operation_type op_type, struct ceph_snap_context *snapc) { @@ -1614,8 +1611,6 @@ static struct rbd_img_request *rbd_img_request_create( img_request->rbd_dev = rbd_dev; img_request->op_type = op_type; - img_request->offset = offset; - img_request->length = length; if (!rbd_img_is_write(img_request)) img_request->snap_id = rbd_dev->spec->snap_id; else @@ -1628,9 +1623,8 @@ static struct rbd_img_request *rbd_img_request_create( INIT_LIST_HEAD(&img_request->object_extents); kref_init(&img_request->kref); - dout("%s: rbd_dev %p %s %llu/%llu -> img %p\n", __func__, rbd_dev, - obj_op_name(op_type), offset, length, img_request); - + dout("%s: rbd_dev %p %s -> img %p\n", __func__, rbd_dev, + obj_op_name(op_type), img_request); return img_request; } @@ -1659,9 +1653,8 @@ static void rbd_img_request_destroy(struct kref *kref) kmem_cache_free(rbd_img_request_cache, img_request); } -static struct rbd_img_request *rbd_parent_request_create( - struct rbd_obj_request *obj_request, - u64 img_offset, u64 length) +static struct rbd_img_request * +rbd_parent_request_create(struct rbd_obj_request *obj_request) { struct rbd_img_request *parent_request; struct rbd_device *rbd_dev; @@ -1669,8 +1662,8 @@ static struct rbd_img_request *rbd_parent_request_create( rbd_assert(obj_request->img_request); rbd_dev = obj_request->img_request->rbd_dev; - parent_request = rbd_img_request_create(rbd_dev->parent, img_offset, - length, OBJ_OP_READ, NULL); + parent_request = rbd_img_request_create(rbd_dev->parent, OBJ_OP_READ, + NULL); if (!parent_request) return NULL; @@ -2127,9 +2120,7 @@ static int rbd_obj_read_from_parent(struct rbd_obj_request *obj_req) struct rbd_img_request *child_img_req; int ret; - child_img_req = rbd_parent_request_create(obj_req, - obj_req->img_extents[0].fe_off, - obj_req->img_extents[0].fe_len); + child_img_req = rbd_parent_request_create(obj_req); if (!child_img_req) return -ENOMEM; @@ -3562,8 +3553,7 @@ static void rbd_queue_workfn(struct work_struct *work) } } - img_request = rbd_img_request_create(rbd_dev, offset, length, op_type, - snapc); + img_request = rbd_img_request_create(rbd_dev, op_type, snapc); if (!img_request) { result = -ENOMEM; goto err_unlock; -- cgit v1.2.3-59-g8ed1b From e93aca0abb8b9f8fd23675dc9110b7517964657a Mon Sep 17 00:00:00 2001 From: Ilya Dryomov Date: Tue, 6 Feb 2018 19:26:35 +0100 Subject: rbd: remove rbd_parent_request_{create,destroy}() rbd_parent_request_create() takes a ref on obj_req for child_img_req. There is no point in doing that because child_img_req is created on behalf of obj_req -- obj_req is the initiator and can't be completed before child_img_req. Open-code the rest of rbd_parent_request_create() and remove it along with rbd_parent_request_destroy(). Signed-off-by: Ilya Dryomov --- drivers/block/rbd.c | 74 +++++------------------------------------------------ 1 file changed, 6 insertions(+), 68 deletions(-) diff --git a/drivers/block/rbd.c b/drivers/block/rbd.c index b3e310a87fd1..5fa4e1aced04 100644 --- a/drivers/block/rbd.c +++ b/drivers/block/rbd.c @@ -1257,13 +1257,6 @@ static void rbd_obj_zero_range(struct rbd_obj_request *obj_req, u32 off, } } -static void rbd_obj_request_get(struct rbd_obj_request *obj_request) -{ - dout("%s: obj %p (was %d)\n", __func__, obj_request, - kref_read(&obj_request->kref)); - kref_get(&obj_request->kref); -} - static void rbd_obj_request_destroy(struct kref *kref); static void rbd_obj_request_put(struct rbd_obj_request *obj_request) { @@ -1280,18 +1273,13 @@ static void rbd_img_request_get(struct rbd_img_request *img_request) kref_get(&img_request->kref); } -static bool img_request_child_test(struct rbd_img_request *img_request); -static void rbd_parent_request_destroy(struct kref *kref); static void rbd_img_request_destroy(struct kref *kref); static void rbd_img_request_put(struct rbd_img_request *img_request) { rbd_assert(img_request != NULL); dout("%s: img %p (was %d)\n", __func__, img_request, kref_read(&img_request->kref)); - if (img_request_child_test(img_request)) - kref_put(&img_request->kref, rbd_parent_request_destroy); - else - kref_put(&img_request->kref, rbd_img_request_destroy); + kref_put(&img_request->kref, rbd_img_request_destroy); } static inline void rbd_img_obj_request_add(struct rbd_img_request *img_request, @@ -1332,24 +1320,6 @@ static void rbd_obj_request_submit(struct rbd_obj_request *obj_request) * is conditionally set to 1 at image request initialization time * and currently never change thereafter. */ -static void img_request_child_set(struct rbd_img_request *img_request) -{ - set_bit(IMG_REQ_CHILD, &img_request->flags); - smp_mb(); -} - -static void img_request_child_clear(struct rbd_img_request *img_request) -{ - clear_bit(IMG_REQ_CHILD, &img_request->flags); - smp_mb(); -} - -static bool img_request_child_test(struct rbd_img_request *img_request) -{ - smp_mb(); - return test_bit(IMG_REQ_CHILD, &img_request->flags) != 0; -} - static void img_request_layered_set(struct rbd_img_request *img_request) { set_bit(IMG_REQ_LAYERED, &img_request->flags); @@ -1653,42 +1623,6 @@ static void rbd_img_request_destroy(struct kref *kref) kmem_cache_free(rbd_img_request_cache, img_request); } -static struct rbd_img_request * -rbd_parent_request_create(struct rbd_obj_request *obj_request) -{ - struct rbd_img_request *parent_request; - struct rbd_device *rbd_dev; - - rbd_assert(obj_request->img_request); - rbd_dev = obj_request->img_request->rbd_dev; - - parent_request = rbd_img_request_create(rbd_dev->parent, OBJ_OP_READ, - NULL); - if (!parent_request) - return NULL; - - img_request_child_set(parent_request); - rbd_obj_request_get(obj_request); - parent_request->obj_request = obj_request; - - return parent_request; -} - -static void rbd_parent_request_destroy(struct kref *kref) -{ - struct rbd_img_request *parent_request; - struct rbd_obj_request *orig_request; - - parent_request = container_of(kref, struct rbd_img_request, kref); - orig_request = parent_request->obj_request; - - parent_request->obj_request = NULL; - rbd_obj_request_put(orig_request); - img_request_child_clear(parent_request); - - rbd_img_request_destroy(kref); -} - static void prune_extents(struct ceph_file_extent *img_extents, u32 *num_img_extents, u64 overlap) { @@ -2120,10 +2054,14 @@ static int rbd_obj_read_from_parent(struct rbd_obj_request *obj_req) struct rbd_img_request *child_img_req; int ret; - child_img_req = rbd_parent_request_create(obj_req); + child_img_req = rbd_img_request_create(img_req->rbd_dev->parent, + OBJ_OP_READ, NULL); if (!child_img_req) return -ENOMEM; + __set_bit(IMG_REQ_CHILD, &child_img_req->flags); + child_img_req->obj_request = obj_req; + if (!rbd_img_is_write(img_req)) { switch (img_req->data_type) { case OBJ_REQUEST_BIO: -- cgit v1.2.3-59-g8ed1b From afb978884c3ec17227626eb371130a97671e5238 Mon Sep 17 00:00:00 2001 From: Ilya Dryomov Date: Tue, 6 Feb 2018 19:26:35 +0100 Subject: rbd: introduce OWN_BVECS data type If the layout is "fancy", we need to be able to rearrange the provided bio_vecs in stripe unit chunks to make it possible for the messenger to read/write directly from/to the provided data buffer, without employing a temporary data buffer for assembling the result. Higher level bio_vec arrays are generally immutable, so this requires copying into a private array. Only the bio_vecs themselves are shuffled around, not the actual data. OWN_BVECS doesn't own any pages. Signed-off-by: Ilya Dryomov --- drivers/block/rbd.c | 156 +++++++++++++++++++++++++++++++++++++++++++++++++--- 1 file changed, 149 insertions(+), 7 deletions(-) diff --git a/drivers/block/rbd.c b/drivers/block/rbd.c index 5fa4e1aced04..056865cfc596 100644 --- a/drivers/block/rbd.c +++ b/drivers/block/rbd.c @@ -215,6 +215,7 @@ enum obj_request_type { OBJ_REQUEST_NODATA = 1, OBJ_REQUEST_BIO, /* pointer into provided bio (list) */ OBJ_REQUEST_BVECS, /* pointer into provided bio_vec array */ + OBJ_REQUEST_OWN_BVECS, /* private bio_vec array, doesn't own pages */ }; enum obj_operation_type { @@ -261,6 +262,7 @@ struct rbd_obj_request { struct { struct ceph_bvec_iter bvec_pos; u32 bvec_count; + u32 bvec_idx; }; }; struct bio_vec *copyup_bvecs; @@ -1238,7 +1240,7 @@ static void zero_bvecs(struct ceph_bvec_iter *bvec_pos, u32 off, u32 bytes) /* * Zero a range in @obj_req data buffer defined by a bio (list) or - * bio_vec array. + * (private) bio_vec array. * * @off is relative to the start of the data buffer. */ @@ -1250,6 +1252,7 @@ static void rbd_obj_zero_range(struct rbd_obj_request *obj_req, u32 off, zero_bios(&obj_req->bio_pos, off, bytes); break; case OBJ_REQUEST_BVECS: + case OBJ_REQUEST_OWN_BVECS: zero_bvecs(&obj_req->bvec_pos, off, bytes); break; default: @@ -1485,6 +1488,9 @@ static void rbd_obj_request_destroy(struct kref *kref) case OBJ_REQUEST_BIO: case OBJ_REQUEST_BVECS: break; /* Nothing to do */ + case OBJ_REQUEST_OWN_BVECS: + kfree(obj_request->bvec_pos.bvecs); + break; default: rbd_assert(0); } @@ -1679,8 +1685,10 @@ static void rbd_osd_req_setup_data(struct rbd_obj_request *obj_req, u32 which) obj_req->ex.oe_len); break; case OBJ_REQUEST_BVECS: + case OBJ_REQUEST_OWN_BVECS: rbd_assert(obj_req->bvec_pos.iter.bi_size == obj_req->ex.oe_len); + rbd_assert(obj_req->bvec_idx == obj_req->bvec_count); osd_req_op_extent_osd_data_bvec_pos(obj_req->osd_req, which, &obj_req->bvec_pos); break; @@ -1893,6 +1901,8 @@ struct rbd_img_fill_ctx { union rbd_img_fill_iter *pos; union rbd_img_fill_iter iter; ceph_object_extent_fn_t set_pos_fn; + ceph_object_extent_fn_t count_fn; + ceph_object_extent_fn_t copy_fn; }; static struct ceph_object_extent *alloc_object_extent(void *arg) @@ -1908,13 +1918,58 @@ static struct ceph_object_extent *alloc_object_extent(void *arg) return &obj_req->ex; } +/* + * While su != os && sc == 1 is technically not fancy (it's the same + * layout as su == os && sc == 1), we can't use the nocopy path for it + * because ->set_pos_fn() should be called only once per object. + * ceph_file_to_extents() invokes action_fn once per stripe unit, so + * treat su != os && sc == 1 as fancy. + */ +static bool rbd_layout_is_fancy(struct ceph_file_layout *l) +{ + return l->stripe_unit != l->object_size; +} + +static int rbd_img_fill_request_nocopy(struct rbd_img_request *img_req, + struct ceph_file_extent *img_extents, + u32 num_img_extents, + struct rbd_img_fill_ctx *fctx) +{ + u32 i; + int ret; + + img_req->data_type = fctx->pos_type; + + /* + * Create object requests and set each object request's starting + * position in the provided bio (list) or bio_vec array. + */ + fctx->iter = *fctx->pos; + for (i = 0; i < num_img_extents; i++) { + ret = ceph_file_to_extents(&img_req->rbd_dev->layout, + img_extents[i].fe_off, + img_extents[i].fe_len, + &img_req->object_extents, + alloc_object_extent, img_req, + fctx->set_pos_fn, &fctx->iter); + if (ret) + return ret; + } + + return __rbd_img_fill_request(img_req); +} + /* * Map a list of image extents to a list of object extents, create the * corresponding object requests (normally each to a different object, * but not always) and add them to @img_req. For each object request, - * set up its data descriptor to point to the corresponding chunk of + * set up its data descriptor to point to the corresponding chunk(s) of * @fctx->pos data buffer. * + * Because ceph_file_to_extents() will merge adjacent object extents + * together, each object request's data descriptor may point to multiple + * different chunks of @fctx->pos data buffer. + * * @fctx->pos data buffer is assumed to be large enough. */ static int rbd_img_fill_request(struct rbd_img_request *img_req, @@ -1922,23 +1977,56 @@ static int rbd_img_fill_request(struct rbd_img_request *img_req, u32 num_img_extents, struct rbd_img_fill_ctx *fctx) { + struct rbd_device *rbd_dev = img_req->rbd_dev; + struct rbd_obj_request *obj_req; u32 i; int ret; - img_req->data_type = fctx->pos_type; + if (fctx->pos_type == OBJ_REQUEST_NODATA || + !rbd_layout_is_fancy(&rbd_dev->layout)) + return rbd_img_fill_request_nocopy(img_req, img_extents, + num_img_extents, fctx); + + img_req->data_type = OBJ_REQUEST_OWN_BVECS; /* - * Create object requests and set each object request's starting - * position in the provided bio (list) or bio_vec array. + * Create object requests and determine ->bvec_count for each object + * request. Note that ->bvec_count sum over all object requests may + * be greater than the number of bio_vecs in the provided bio (list) + * or bio_vec array because when mapped, those bio_vecs can straddle + * stripe unit boundaries. */ fctx->iter = *fctx->pos; for (i = 0; i < num_img_extents; i++) { - ret = ceph_file_to_extents(&img_req->rbd_dev->layout, + ret = ceph_file_to_extents(&rbd_dev->layout, img_extents[i].fe_off, img_extents[i].fe_len, &img_req->object_extents, alloc_object_extent, img_req, - fctx->set_pos_fn, &fctx->iter); + fctx->count_fn, &fctx->iter); + if (ret) + return ret; + } + + for_each_obj_request(img_req, obj_req) { + obj_req->bvec_pos.bvecs = kmalloc_array(obj_req->bvec_count, + sizeof(*obj_req->bvec_pos.bvecs), + GFP_NOIO); + if (!obj_req->bvec_pos.bvecs) + return -ENOMEM; + } + + /* + * Fill in each object request's private bio_vec array, splitting and + * rearranging the provided bio_vecs in stripe unit chunks as needed. + */ + fctx->iter = *fctx->pos; + for (i = 0; i < num_img_extents; i++) { + ret = ceph_iterate_extents(&rbd_dev->layout, + img_extents[i].fe_off, + img_extents[i].fe_len, + &img_req->object_extents, + fctx->copy_fn, &fctx->iter); if (ret) return ret; } @@ -1970,6 +2058,32 @@ static void set_bio_pos(struct ceph_object_extent *ex, u32 bytes, void *arg) ceph_bio_iter_advance(it, bytes); } +static void count_bio_bvecs(struct ceph_object_extent *ex, u32 bytes, void *arg) +{ + struct rbd_obj_request *obj_req = + container_of(ex, struct rbd_obj_request, ex); + struct ceph_bio_iter *it = arg; + + dout("%s objno %llu bytes %u\n", __func__, ex->oe_objno, bytes); + ceph_bio_iter_advance_step(it, bytes, ({ + obj_req->bvec_count++; + })); + +} + +static void copy_bio_bvecs(struct ceph_object_extent *ex, u32 bytes, void *arg) +{ + struct rbd_obj_request *obj_req = + container_of(ex, struct rbd_obj_request, ex); + struct ceph_bio_iter *it = arg; + + dout("%s objno %llu bytes %u\n", __func__, ex->oe_objno, bytes); + ceph_bio_iter_advance_step(it, bytes, ({ + obj_req->bvec_pos.bvecs[obj_req->bvec_idx++] = bv; + obj_req->bvec_pos.iter.bi_size += bv.bv_len; + })); +} + static int __rbd_img_fill_from_bio(struct rbd_img_request *img_req, struct ceph_file_extent *img_extents, u32 num_img_extents, @@ -1979,6 +2093,8 @@ static int __rbd_img_fill_from_bio(struct rbd_img_request *img_req, .pos_type = OBJ_REQUEST_BIO, .pos = (union rbd_img_fill_iter *)bio_pos, .set_pos_fn = set_bio_pos, + .count_fn = count_bio_bvecs, + .copy_fn = copy_bio_bvecs, }; return rbd_img_fill_request(img_req, img_extents, num_img_extents, @@ -2005,6 +2121,29 @@ static void set_bvec_pos(struct ceph_object_extent *ex, u32 bytes, void *arg) ceph_bvec_iter_advance(it, bytes); } +static void count_bvecs(struct ceph_object_extent *ex, u32 bytes, void *arg) +{ + struct rbd_obj_request *obj_req = + container_of(ex, struct rbd_obj_request, ex); + struct ceph_bvec_iter *it = arg; + + ceph_bvec_iter_advance_step(it, bytes, ({ + obj_req->bvec_count++; + })); +} + +static void copy_bvecs(struct ceph_object_extent *ex, u32 bytes, void *arg) +{ + struct rbd_obj_request *obj_req = + container_of(ex, struct rbd_obj_request, ex); + struct ceph_bvec_iter *it = arg; + + ceph_bvec_iter_advance_step(it, bytes, ({ + obj_req->bvec_pos.bvecs[obj_req->bvec_idx++] = bv; + obj_req->bvec_pos.iter.bi_size += bv.bv_len; + })); +} + static int __rbd_img_fill_from_bvecs(struct rbd_img_request *img_req, struct ceph_file_extent *img_extents, u32 num_img_extents, @@ -2014,6 +2153,8 @@ static int __rbd_img_fill_from_bvecs(struct rbd_img_request *img_req, .pos_type = OBJ_REQUEST_BVECS, .pos = (union rbd_img_fill_iter *)bvec_pos, .set_pos_fn = set_bvec_pos, + .count_fn = count_bvecs, + .copy_fn = copy_bvecs, }; return rbd_img_fill_request(img_req, img_extents, num_img_extents, @@ -2071,6 +2212,7 @@ static int rbd_obj_read_from_parent(struct rbd_obj_request *obj_req) &obj_req->bio_pos); break; case OBJ_REQUEST_BVECS: + case OBJ_REQUEST_OWN_BVECS: ret = __rbd_img_fill_from_bvecs(child_img_req, obj_req->img_extents, obj_req->num_img_extents, -- cgit v1.2.3-59-g8ed1b From b13318521776304a37c8cb3e2a3e613d228a38f3 Mon Sep 17 00:00:00 2001 From: Ilya Dryomov Date: Wed, 7 Feb 2018 12:09:12 +0100 Subject: rbd: allow "fancy" striping Signed-off-by: Ilya Dryomov Acked-by: Jason Dillaman --- drivers/block/rbd.c | 29 ++--------------------------- 1 file changed, 2 insertions(+), 27 deletions(-) diff --git a/drivers/block/rbd.c b/drivers/block/rbd.c index 056865cfc596..9a7f172103bb 100644 --- a/drivers/block/rbd.c +++ b/drivers/block/rbd.c @@ -4615,9 +4615,6 @@ static int rbd_dev_v2_striping_info(struct rbd_device *rbd_dev) } __attribute__ ((packed)) striping_info_buf = { 0 }; size_t size = sizeof (striping_info_buf); void *p; - u64 obj_size; - u64 stripe_unit; - u64 stripe_count; int ret; ret = rbd_obj_method_sync(rbd_dev, &rbd_dev->header_oid, @@ -4629,31 +4626,9 @@ static int rbd_dev_v2_striping_info(struct rbd_device *rbd_dev) if (ret < size) return -ERANGE; - /* - * We don't actually support the "fancy striping" feature - * (STRIPINGV2) yet, but if the striping sizes are the - * defaults the behavior is the same as before. So find - * out, and only fail if the image has non-default values. - */ - ret = -EINVAL; - obj_size = rbd_obj_bytes(&rbd_dev->header); p = &striping_info_buf; - stripe_unit = ceph_decode_64(&p); - if (stripe_unit != obj_size) { - rbd_warn(rbd_dev, "unsupported stripe unit " - "(got %llu want %llu)", - stripe_unit, obj_size); - return -EINVAL; - } - stripe_count = ceph_decode_64(&p); - if (stripe_count != 1) { - rbd_warn(rbd_dev, "unsupported stripe count " - "(got %llu want 1)", stripe_count); - return -EINVAL; - } - rbd_dev->header.stripe_unit = stripe_unit; - rbd_dev->header.stripe_count = stripe_count; - + rbd_dev->header.stripe_unit = ceph_decode_64(&p); + rbd_dev->header.stripe_count = ceph_decode_64(&p); return 0; } -- cgit v1.2.3-59-g8ed1b From 4c069a5821ddc568e9509f49fcc9481c8a43712f Mon Sep 17 00:00:00 2001 From: Chengguang Xu Date: Tue, 30 Jan 2018 16:29:17 +0800 Subject: ceph: add newline to end of debug message format Some of dout format do not include newline in the end, fix for the files which are in fs/ceph and net/ceph directories, and changing printk to dout for printing debug info in super.c Signed-off-by: Chengguang Xu Reviewed-by: "Yan, Zheng" Signed-off-by: Ilya Dryomov --- fs/ceph/cache.c | 2 +- fs/ceph/dir.c | 2 +- fs/ceph/file.c | 2 +- fs/ceph/locks.c | 20 ++++++++++---------- fs/ceph/mds_client.c | 10 +++++----- fs/ceph/super.c | 1 - net/ceph/ceph_common.c | 2 +- 7 files changed, 19 insertions(+), 20 deletions(-) diff --git a/fs/ceph/cache.c b/fs/ceph/cache.c index a3ab265d3215..3781f723ff31 100644 --- a/fs/ceph/cache.c +++ b/fs/ceph/cache.c @@ -190,7 +190,7 @@ static enum fscache_checkaux ceph_fscache_inode_check_aux( if (memcmp(data, &aux, sizeof(aux)) != 0) return FSCACHE_CHECKAUX_OBSOLETE; - dout("ceph inode 0x%p cached okay", ci); + dout("ceph inode 0x%p cached okay\n", ci); return FSCACHE_CHECKAUX_OKAY; } diff --git a/fs/ceph/dir.c b/fs/ceph/dir.c index f1d9c6cc0491..b7771e9e0c71 100644 --- a/fs/ceph/dir.c +++ b/fs/ceph/dir.c @@ -451,7 +451,7 @@ more: fi->dir_ordered_count = req->r_dir_ordered_cnt; } } else { - dout("readdir !did_prepopulate"); + dout("readdir !did_prepopulate\n"); /* disable readdir cache */ fi->readdir_cache_idx = -1; /* preclude from marking dir complete */ diff --git a/fs/ceph/file.c b/fs/ceph/file.c index b67eec3532a1..c80eb1d93b41 100644 --- a/fs/ceph/file.c +++ b/fs/ceph/file.c @@ -41,7 +41,7 @@ static __le32 ceph_flags_sys2wire(u32 flags) #undef ceph_sys2wire if (flags) - dout("unused open flags: %x", flags); + dout("unused open flags: %x\n", flags); return cpu_to_le32(wire_flags); } diff --git a/fs/ceph/locks.c b/fs/ceph/locks.c index 9e66f69ee8a5..9dae2ec7e1fa 100644 --- a/fs/ceph/locks.c +++ b/fs/ceph/locks.c @@ -95,7 +95,7 @@ static int ceph_lock_message(u8 lock_type, u16 operation, struct inode *inode, owner = secure_addr(fl->fl_owner); dout("ceph_lock_message: rule: %d, op: %d, owner: %llx, pid: %llu, " - "start: %llu, length: %llu, wait: %d, type: %d", (int)lock_type, + "start: %llu, length: %llu, wait: %d, type: %d\n", (int)lock_type, (int)operation, owner, (u64)fl->fl_pid, fl->fl_start, length, wait, fl->fl_type); @@ -132,7 +132,7 @@ static int ceph_lock_message(u8 lock_type, u16 operation, struct inode *inode, } ceph_mdsc_put_request(req); dout("ceph_lock_message: rule: %d, op: %d, pid: %llu, start: %llu, " - "length: %llu, wait: %d, type: %d, err code %d", (int)lock_type, + "length: %llu, wait: %d, type: %d, err code %d\n", (int)lock_type, (int)operation, (u64)fl->fl_pid, fl->fl_start, length, wait, fl->fl_type, err); return err; @@ -226,7 +226,7 @@ int ceph_lock(struct file *file, int cmd, struct file_lock *fl) if (__mandatory_lock(file->f_mapping->host) && fl->fl_type != F_UNLCK) return -ENOLCK; - dout("ceph_lock, fl_owner: %p", fl->fl_owner); + dout("ceph_lock, fl_owner: %p\n", fl->fl_owner); /* set wait bit as appropriate, then make command as Ceph expects it*/ if (IS_GETLK(cmd)) @@ -264,7 +264,7 @@ int ceph_lock(struct file *file, int cmd, struct file_lock *fl) err = ceph_lock_message(CEPH_LOCK_FCNTL, op, inode, lock_cmd, wait, fl); if (!err) { if (op == CEPH_MDS_OP_SETFILELOCK) { - dout("mds locked, locking locally"); + dout("mds locked, locking locally\n"); err = posix_lock_file(file, fl, NULL); if (err) { /* undo! This should only happen if @@ -272,7 +272,7 @@ int ceph_lock(struct file *file, int cmd, struct file_lock *fl) * deadlock. */ ceph_lock_message(CEPH_LOCK_FCNTL, op, inode, CEPH_LOCK_UNLOCK, 0, fl); - dout("got %d on posix_lock_file, undid lock", + dout("got %d on posix_lock_file, undid lock\n", err); } } @@ -294,7 +294,7 @@ int ceph_flock(struct file *file, int cmd, struct file_lock *fl) if (fl->fl_type & LOCK_MAND) return -EOPNOTSUPP; - dout("ceph_flock, fl_file: %p", fl->fl_file); + dout("ceph_flock, fl_file: %p\n", fl->fl_file); spin_lock(&ci->i_ceph_lock); if (ci->i_ceph_flags & CEPH_I_ERROR_FILELOCK) { @@ -329,7 +329,7 @@ int ceph_flock(struct file *file, int cmd, struct file_lock *fl) ceph_lock_message(CEPH_LOCK_FLOCK, CEPH_MDS_OP_SETFILELOCK, inode, CEPH_LOCK_UNLOCK, 0, fl); - dout("got %d on locks_lock_file_wait, undid lock", err); + dout("got %d on locks_lock_file_wait, undid lock\n", err); } } return err; @@ -356,7 +356,7 @@ void ceph_count_locks(struct inode *inode, int *fcntl_count, int *flock_count) ++(*flock_count); spin_unlock(&ctx->flc_lock); } - dout("counted %d flock locks and %d fcntl locks", + dout("counted %d flock locks and %d fcntl locks\n", *flock_count, *fcntl_count); } @@ -384,7 +384,7 @@ static int lock_to_ceph_filelock(struct file_lock *lock, cephlock->type = CEPH_LOCK_UNLOCK; break; default: - dout("Have unknown lock type %d", lock->fl_type); + dout("Have unknown lock type %d\n", lock->fl_type); err = -EINVAL; } @@ -407,7 +407,7 @@ int ceph_encode_locks_to_buffer(struct inode *inode, int seen_flock = 0; int l = 0; - dout("encoding %d flock and %d fcntl locks", num_flock_locks, + dout("encoding %d flock and %d fcntl locks\n", num_flock_locks, num_fcntl_locks); if (!ctx) diff --git a/fs/ceph/mds_client.c b/fs/ceph/mds_client.c index 2e8f90f96540..b9cbeeb32ab3 100644 --- a/fs/ceph/mds_client.c +++ b/fs/ceph/mds_client.c @@ -384,7 +384,7 @@ static struct ceph_mds_session *get_session(struct ceph_mds_session *s) refcount_read(&s->s_ref)-1, refcount_read(&s->s_ref)); return s; } else { - dout("mdsc get_session %p 0 -- FAIL", s); + dout("mdsc get_session %p 0 -- FAIL\n", s); return NULL; } } @@ -2531,10 +2531,10 @@ static void handle_reply(struct ceph_mds_session *session, struct ceph_msg *msg) * Otherwise we just have to return an ESTALE */ if (result == -ESTALE) { - dout("got ESTALE on request %llu", req->r_tid); + dout("got ESTALE on request %llu\n", req->r_tid); req->r_resend_mds = -1; if (req->r_direct_mode != USE_AUTH_MDS) { - dout("not using auth, setting for that now"); + dout("not using auth, setting for that now\n"); req->r_direct_mode = USE_AUTH_MDS; __do_request(mdsc, req); mutex_unlock(&mdsc->mutex); @@ -2542,13 +2542,13 @@ static void handle_reply(struct ceph_mds_session *session, struct ceph_msg *msg) } else { int mds = __choose_mds(mdsc, req); if (mds >= 0 && mds != req->r_session->s_mds) { - dout("but auth changed, so resending"); + dout("but auth changed, so resending\n"); __do_request(mdsc, req); mutex_unlock(&mdsc->mutex); goto out; } } - dout("have to return ESTALE on request %llu", req->r_tid); + dout("have to return ESTALE on request %llu\n", req->r_tid); } diff --git a/fs/ceph/super.c b/fs/ceph/super.c index fb2bc9c15a23..fb32379cd42c 100644 --- a/fs/ceph/super.c +++ b/fs/ceph/super.c @@ -320,7 +320,6 @@ static int parse_fsopt_token(char *c, void *private) break; case Opt_poolperm: fsopt->flags &= ~CEPH_MOUNT_OPT_NOPOOLPERM; - printk ("pool perm"); break; case Opt_nopoolperm: fsopt->flags |= CEPH_MOUNT_OPT_NOPOOLPERM; diff --git a/net/ceph/ceph_common.c b/net/ceph/ceph_common.c index 4d4c82229e9e..627ffab77695 100644 --- a/net/ceph/ceph_common.c +++ b/net/ceph/ceph_common.c @@ -217,7 +217,7 @@ static int parse_fsid(const char *str, struct ceph_fsid *fsid) if (i == 16) err = 0; - dout("parse_fsid ret %d got fsid %pU", err, fsid); + dout("parse_fsid ret %d got fsid %pU\n", err, fsid); return err; } -- cgit v1.2.3-59-g8ed1b From 7ae7a828d9ac249b175f1b6d1c21c77720cd6098 Mon Sep 17 00:00:00 2001 From: Chengguang Xu Date: Wed, 7 Feb 2018 10:27:06 +0800 Subject: ceph: keep consistent semantic in fscache related option combination When specifying multiple fscache related options, the result isn't always the same as option order, this fix will keep strict consistent meaning by order. Signed-off-by: Chengguang Xu Reviewed-by: "Yan, Zheng" Signed-off-by: Ilya Dryomov --- fs/ceph/super.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/fs/ceph/super.c b/fs/ceph/super.c index fb32379cd42c..ca8a830c07ad 100644 --- a/fs/ceph/super.c +++ b/fs/ceph/super.c @@ -314,9 +314,13 @@ static int parse_fsopt_token(char *c, void *private) break; case Opt_fscache: fsopt->flags |= CEPH_MOUNT_OPT_FSCACHE; + kfree(fsopt->fscache_uniq); + fsopt->fscache_uniq = NULL; break; case Opt_nofscache: fsopt->flags &= ~CEPH_MOUNT_OPT_FSCACHE; + kfree(fsopt->fscache_uniq); + fsopt->fscache_uniq = NULL; break; case Opt_poolperm: fsopt->flags &= ~CEPH_MOUNT_OPT_NOPOOLPERM; -- cgit v1.2.3-59-g8ed1b From 11e1478df91cba4919c2bb011c49f659ebed3d16 Mon Sep 17 00:00:00 2001 From: Chengguang Xu Date: Sat, 10 Feb 2018 14:18:06 +0800 Subject: libceph, ceph: change permission for readonly debugfs entries Remove write permission for debugfs entries which only have readonly function. Signed-off-by: Chengguang Xu Reviewed-by: Ilya Dryomov Signed-off-by: Ilya Dryomov --- fs/ceph/debugfs.c | 8 ++++---- net/ceph/debugfs.c | 10 +++++----- 2 files changed, 9 insertions(+), 9 deletions(-) diff --git a/fs/ceph/debugfs.c b/fs/ceph/debugfs.c index 644def813754..abdf98deeec4 100644 --- a/fs/ceph/debugfs.c +++ b/fs/ceph/debugfs.c @@ -260,7 +260,7 @@ int ceph_fs_debugfs_init(struct ceph_fs_client *fsc) goto out; fsc->debugfs_mdsmap = debugfs_create_file("mdsmap", - 0600, + 0400, fsc->client->debugfs_dir, fsc, &mdsmap_show_fops); @@ -268,7 +268,7 @@ int ceph_fs_debugfs_init(struct ceph_fs_client *fsc) goto out; fsc->debugfs_mds_sessions = debugfs_create_file("mds_sessions", - 0600, + 0400, fsc->client->debugfs_dir, fsc, &mds_sessions_show_fops); @@ -276,7 +276,7 @@ int ceph_fs_debugfs_init(struct ceph_fs_client *fsc) goto out; fsc->debugfs_mdsc = debugfs_create_file("mdsc", - 0600, + 0400, fsc->client->debugfs_dir, fsc, &mdsc_show_fops); @@ -292,7 +292,7 @@ int ceph_fs_debugfs_init(struct ceph_fs_client *fsc) goto out; fsc->debugfs_dentry_lru = debugfs_create_file("dentry_lru", - 0600, + 0400, fsc->client->debugfs_dir, fsc, &dentry_lru_show_fops); diff --git a/net/ceph/debugfs.c b/net/ceph/debugfs.c index 1eef6806aa1a..0ef0f32a4570 100644 --- a/net/ceph/debugfs.c +++ b/net/ceph/debugfs.c @@ -418,7 +418,7 @@ int ceph_debugfs_client_init(struct ceph_client *client) goto out; client->monc.debugfs_file = debugfs_create_file("monc", - 0600, + 0400, client->debugfs_dir, client, &monc_show_fops); @@ -426,7 +426,7 @@ int ceph_debugfs_client_init(struct ceph_client *client) goto out; client->osdc.debugfs_file = debugfs_create_file("osdc", - 0600, + 0400, client->debugfs_dir, client, &osdc_show_fops); @@ -434,7 +434,7 @@ int ceph_debugfs_client_init(struct ceph_client *client) goto out; client->debugfs_monmap = debugfs_create_file("monmap", - 0600, + 0400, client->debugfs_dir, client, &monmap_show_fops); @@ -442,7 +442,7 @@ int ceph_debugfs_client_init(struct ceph_client *client) goto out; client->debugfs_osdmap = debugfs_create_file("osdmap", - 0600, + 0400, client->debugfs_dir, client, &osdmap_show_fops); @@ -450,7 +450,7 @@ int ceph_debugfs_client_init(struct ceph_client *client) goto out; client->debugfs_options = debugfs_create_file("client_options", - 0600, + 0400, client->debugfs_dir, client, &client_options_show_fops); -- cgit v1.2.3-59-g8ed1b From 7377324e5bb2ed4c89e9d60691462a7272ee08a5 Mon Sep 17 00:00:00 2001 From: Chengguang Xu Date: Sun, 11 Feb 2018 09:33:28 +0800 Subject: libceph: fix misjudgement of maximum monitor number num_mon should allow up to CEPH_MAX_MON in ceph_monmap_decode(). Signed-off-by: Chengguang Xu Reviewed-by: Ilya Dryomov Signed-off-by: Ilya Dryomov --- net/ceph/mon_client.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/net/ceph/mon_client.c b/net/ceph/mon_client.c index 1547107f4854..b3dac24412d3 100644 --- a/net/ceph/mon_client.c +++ b/net/ceph/mon_client.c @@ -60,7 +60,7 @@ struct ceph_monmap *ceph_monmap_decode(void *p, void *end) num_mon = ceph_decode_32(&p); ceph_decode_need(&p, end, num_mon*sizeof(m->mon_inst[0]), bad); - if (num_mon >= CEPH_MAX_MON) + if (num_mon > CEPH_MAX_MON) goto bad; m = kmalloc(sizeof(*m) + sizeof(m->mon_inst[0])*num_mon, GFP_NOFS); if (m == NULL) -- cgit v1.2.3-59-g8ed1b From 4d8969af28a5c1bccd9f42cf98ab5cff3c0fe140 Mon Sep 17 00:00:00 2001 From: Chengguang Xu Date: Thu, 15 Feb 2018 15:39:05 +0800 Subject: ceph: use seq_show_option for string type options Using seq_show_option to replace seq_printf for string type options. Signed-off-by: Chengguang Xu Reviewed-by: Ilya Dryomov Signed-off-by: Ilya Dryomov --- fs/ceph/super.c | 7 ++----- 1 file changed, 2 insertions(+), 5 deletions(-) diff --git a/fs/ceph/super.c b/fs/ceph/super.c index ca8a830c07ad..52fec209f0a6 100644 --- a/fs/ceph/super.c +++ b/fs/ceph/super.c @@ -516,10 +516,7 @@ static int ceph_show_options(struct seq_file *m, struct dentry *root) if ((fsopt->flags & CEPH_MOUNT_OPT_DCACHE) == 0) seq_puts(m, ",nodcache"); if (fsopt->flags & CEPH_MOUNT_OPT_FSCACHE) { - if (fsopt->fscache_uniq) - seq_printf(m, ",fsc=%s", fsopt->fscache_uniq); - else - seq_puts(m, ",fsc"); + seq_show_option(m, "fsc", fsopt->fscache_uniq); } if (fsopt->flags & CEPH_MOUNT_OPT_NOPOOLPERM) seq_puts(m, ",nopoolperm"); @@ -532,7 +529,7 @@ static int ceph_show_options(struct seq_file *m, struct dentry *root) #endif if (fsopt->mds_namespace) - seq_printf(m, ",mds_namespace=%s", fsopt->mds_namespace); + seq_show_option(m, "mds_namespace", fsopt->mds_namespace); if (fsopt->wsize) seq_printf(m, ",wsize=%d", fsopt->wsize); if (fsopt->rsize != CEPH_MAX_READ_SIZE) -- cgit v1.2.3-59-g8ed1b From 0a4a1e68d861848d09ab4b4b280d13584ad8ca45 Mon Sep 17 00:00:00 2001 From: Ilya Dryomov Date: Mon, 12 Feb 2018 16:00:36 +0100 Subject: rbd: remove redundant declaration of rbd_spec_put() Signed-off-by: Ilya Dryomov --- drivers/block/rbd.c | 1 - 1 file changed, 1 deletion(-) diff --git a/drivers/block/rbd.c b/drivers/block/rbd.c index 9a7f172103bb..5416b44741a3 100644 --- a/drivers/block/rbd.c +++ b/drivers/block/rbd.c @@ -445,7 +445,6 @@ static ssize_t rbd_add_single_major(struct bus_type *bus, const char *buf, static ssize_t rbd_remove_single_major(struct bus_type *bus, const char *buf, size_t count); static int rbd_dev_image_probe(struct rbd_device *rbd_dev, int depth); -static void rbd_spec_put(struct rbd_spec *spec); static int rbd_dev_id_to_minor(int dev_id) { -- cgit v1.2.3-59-g8ed1b From 5feb0d8d2f10c3f39f3d3a754dded74bb430a5e6 Mon Sep 17 00:00:00 2001 From: Ilya Dryomov Date: Thu, 22 Feb 2018 13:19:04 +0100 Subject: rbd: move rbd_get_client() below rbd_put_client() ... to avoid a forward declaration in the next commit. Signed-off-by: Ilya Dryomov --- drivers/block/rbd.c | 40 ++++++++++++++++++++-------------------- 1 file changed, 20 insertions(+), 20 deletions(-) diff --git a/drivers/block/rbd.c b/drivers/block/rbd.c index 5416b44741a3..a3061925dac4 100644 --- a/drivers/block/rbd.c +++ b/drivers/block/rbd.c @@ -839,26 +839,6 @@ static char* obj_op_name(enum obj_operation_type op_type) } } -/* - * Get a ceph client with specific addr and configuration, if one does - * not exist create it. Either way, ceph_opts is consumed by this - * function. - */ -static struct rbd_client *rbd_get_client(struct ceph_options *ceph_opts) -{ - struct rbd_client *rbdc; - - mutex_lock_nested(&client_mutex, SINGLE_DEPTH_NESTING); - rbdc = rbd_client_find(ceph_opts); - if (rbdc) /* using an existing client */ - ceph_destroy_options(ceph_opts); - else - rbdc = rbd_client_create(ceph_opts); - mutex_unlock(&client_mutex); - - return rbdc; -} - /* * Destroy ceph client * @@ -887,6 +867,26 @@ static void rbd_put_client(struct rbd_client *rbdc) kref_put(&rbdc->kref, rbd_client_release); } +/* + * Get a ceph client with specific addr and configuration, if one does + * not exist create it. Either way, ceph_opts is consumed by this + * function. + */ +static struct rbd_client *rbd_get_client(struct ceph_options *ceph_opts) +{ + struct rbd_client *rbdc; + + mutex_lock_nested(&client_mutex, SINGLE_DEPTH_NESTING); + rbdc = rbd_client_find(ceph_opts); + if (rbdc) /* using an existing client */ + ceph_destroy_options(ceph_opts); + else + rbdc = rbd_client_create(ceph_opts); + mutex_unlock(&client_mutex); + + return rbdc; +} + static bool rbd_image_format_valid(u32 image_format) { return image_format == 1 || image_format == 2; -- cgit v1.2.3-59-g8ed1b From dd4358550fc5244d4757eae40e23d87894fe5273 Mon Sep 17 00:00:00 2001 From: Ilya Dryomov Date: Thu, 22 Feb 2018 13:43:24 +0100 Subject: rbd: get the latest osdmap when using an existing client Currently we request the latest osdmap only if ceph_pg_poolid_by_name() fails with -ENOENT. This is effective with newly created pools, but we also want to avoid attempting to map from pools that were recently deleted and report "pool does not exist" instead. (Such an attempt eventually fails in the OSD client after map check code kicks in, but the error message is confusing.) Request the latest osdmap unconditionally after bumping a ref on an existing client in rbd_client_find(). Signed-off-by: Ilya Dryomov --- drivers/block/rbd.c | 69 +++++++++++++++++++++++++---------------------------- 1 file changed, 33 insertions(+), 36 deletions(-) diff --git a/drivers/block/rbd.c b/drivers/block/rbd.c index a3061925dac4..a382fced33dd 100644 --- a/drivers/block/rbd.c +++ b/drivers/block/rbd.c @@ -867,6 +867,23 @@ static void rbd_put_client(struct rbd_client *rbdc) kref_put(&rbdc->kref, rbd_client_release); } +static int wait_for_latest_osdmap(struct ceph_client *client) +{ + u64 newest_epoch; + int ret; + + ret = ceph_monc_get_version(&client->monc, "osdmap", &newest_epoch); + if (ret) + return ret; + + if (client->osdc.osdmap->epoch >= newest_epoch) + return 0; + + ceph_osdc_maybe_request_map(&client->osdc); + return ceph_monc_wait_osdmap(&client->monc, newest_epoch, + client->options->mount_timeout); +} + /* * Get a ceph client with specific addr and configuration, if one does * not exist create it. Either way, ceph_opts is consumed by this @@ -875,13 +892,26 @@ static void rbd_put_client(struct rbd_client *rbdc) static struct rbd_client *rbd_get_client(struct ceph_options *ceph_opts) { struct rbd_client *rbdc; + int ret; mutex_lock_nested(&client_mutex, SINGLE_DEPTH_NESTING); rbdc = rbd_client_find(ceph_opts); - if (rbdc) /* using an existing client */ + if (rbdc) { ceph_destroy_options(ceph_opts); - else + + /* + * Using an existing client. Make sure ->pg_pools is up to + * date before we look up the pool id in do_rbd_add(). + */ + ret = wait_for_latest_osdmap(rbdc->client); + if (ret) { + rbd_warn(NULL, "failed to get latest osdmap: %d", ret); + rbd_put_client(rbdc); + rbdc = ERR_PTR(ret); + } + } else { rbdc = rbd_client_create(ceph_opts); + } mutex_unlock(&client_mutex); return rbdc; @@ -5185,39 +5215,6 @@ out_err: return ret; } -/* - * Return pool id (>= 0) or a negative error code. - */ -static int rbd_add_get_pool_id(struct rbd_client *rbdc, const char *pool_name) -{ - struct ceph_options *opts = rbdc->client->options; - u64 newest_epoch; - int tries = 0; - int ret; - -again: - ret = ceph_pg_poolid_by_name(rbdc->client->osdc.osdmap, pool_name); - if (ret == -ENOENT && tries++ < 1) { - ret = ceph_monc_get_version(&rbdc->client->monc, "osdmap", - &newest_epoch); - if (ret < 0) - return ret; - - if (rbdc->client->osdc.osdmap->epoch < newest_epoch) { - ceph_osdc_maybe_request_map(&rbdc->client->osdc); - (void) ceph_monc_wait_osdmap(&rbdc->client->monc, - newest_epoch, - opts->mount_timeout); - goto again; - } else { - /* the osdmap we have is new enough */ - return -ENOENT; - } - } - - return ret; -} - static void rbd_dev_image_unlock(struct rbd_device *rbd_dev) { down_write(&rbd_dev->lock_rwsem); @@ -5646,7 +5643,7 @@ static ssize_t do_rbd_add(struct bus_type *bus, } /* pick the pool */ - rc = rbd_add_get_pool_id(rbdc, spec->pool_name); + rc = ceph_pg_poolid_by_name(rbdc->client->osdc.osdmap, spec->pool_name); if (rc < 0) { if (rc == -ENOENT) pr_info("pool %s does not exist\n", spec->pool_name); -- cgit v1.2.3-59-g8ed1b From f2f87877b8f29a4aa0000a2e3cdf806ac645500e Mon Sep 17 00:00:00 2001 From: Chengguang Xu Date: Thu, 22 Feb 2018 15:47:05 +0800 Subject: libceph: adding missing message types to ceph_msg_type_name() Some of message types are missing in ceph_msg_type_name(), so just adding them for better understanding of output information. Signed-off-by: Chengguang Xu Reviewed-by: Ilya Dryomov Signed-off-by: Ilya Dryomov --- net/ceph/ceph_common.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/net/ceph/ceph_common.c b/net/ceph/ceph_common.c index 627ffab77695..c15e2699090c 100644 --- a/net/ceph/ceph_common.c +++ b/net/ceph/ceph_common.c @@ -72,6 +72,7 @@ const char *ceph_msg_type_name(int type) case CEPH_MSG_MON_GET_VERSION: return "mon_get_version"; case CEPH_MSG_MON_GET_VERSION_REPLY: return "mon_get_version_reply"; case CEPH_MSG_MDS_MAP: return "mds_map"; + case CEPH_MSG_FS_MAP_USER: return "fs_map_user"; case CEPH_MSG_CLIENT_SESSION: return "client_session"; case CEPH_MSG_CLIENT_RECONNECT: return "client_reconnect"; case CEPH_MSG_CLIENT_REQUEST: return "client_request"; @@ -81,6 +82,10 @@ const char *ceph_msg_type_name(int type) case CEPH_MSG_CLIENT_CAPRELEASE: return "client_cap_release"; case CEPH_MSG_CLIENT_SNAP: return "client_snap"; case CEPH_MSG_CLIENT_LEASE: return "client_lease"; + case CEPH_MSG_POOLOP_REPLY: return "poolop_reply"; + case CEPH_MSG_POOLOP: return "poolop"; + case CEPH_MSG_MON_COMMAND: return "mon_command"; + case CEPH_MSG_MON_COMMAND_ACK: return "mon_command_ack"; case CEPH_MSG_OSD_MAP: return "osd_map"; case CEPH_MSG_OSD_OP: return "osd_op"; case CEPH_MSG_OSD_OPREPLY: return "osd_opreply"; -- cgit v1.2.3-59-g8ed1b From b884014a91a49ed0e7198d276b28887cc48363bd Mon Sep 17 00:00:00 2001 From: Chengguang Xu Date: Fri, 23 Feb 2018 17:09:38 +0800 Subject: ceph: adding protection for showing cap reservation info Adding spinlock protection during getting cap reservation ralated fields so that the numbers match below BUG_ON condition in the code. BUG_ON(mdsc->caps_total_count != mdsc->caps_use_count + mdsc->caps_reserve_count + mdsc->caps_avail_count); Signed-off-by: Chengguang Xu Reviewed-by: "Yan, Zheng" Signed-off-by: Ilya Dryomov --- fs/ceph/caps.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/fs/ceph/caps.c b/fs/ceph/caps.c index 0e5bd3e3344e..1d02648788e3 100644 --- a/fs/ceph/caps.c +++ b/fs/ceph/caps.c @@ -341,6 +341,8 @@ void ceph_reservation_status(struct ceph_fs_client *fsc, { struct ceph_mds_client *mdsc = fsc->mdsc; + spin_lock(&mdsc->caps_list_lock); + if (total) *total = mdsc->caps_total_count; if (avail) @@ -351,6 +353,8 @@ void ceph_reservation_status(struct ceph_fs_client *fsc, *reserved = mdsc->caps_reserve_count; if (min) *min = mdsc->caps_min_count; + + spin_unlock(&mdsc->caps_list_lock); } /* -- cgit v1.2.3-59-g8ed1b From e327ce068518e38c0182739e879b9dce477c8d85 Mon Sep 17 00:00:00 2001 From: Chengguang Xu Date: Sat, 24 Feb 2018 18:35:29 +0800 Subject: ceph: optimizing cap allocation When setting high volume of caps_min_count or having many unreserved caps, unused caps may always keep in the ->caps_list even can't get new cap from kmem_cache_alloc because lack of maximum limitation of caps_avail_count. Hence reuse caps in ->caps_list if available, it's maybe better than setting max limitation of caps_avail_count and releasing unused caps when reaching the limit. Signed-off-by: Chengguang Xu Reviewed-by: "Yan, Zheng" Signed-off-by: Ilya Dryomov --- fs/ceph/caps.c | 16 ++++++++++++++++ 1 file changed, 16 insertions(+) diff --git a/fs/ceph/caps.c b/fs/ceph/caps.c index 1d02648788e3..421cdce71fb0 100644 --- a/fs/ceph/caps.c +++ b/fs/ceph/caps.c @@ -285,7 +285,23 @@ struct ceph_cap *ceph_get_cap(struct ceph_mds_client *mdsc, mdsc->caps_use_count++; mdsc->caps_total_count++; spin_unlock(&mdsc->caps_list_lock); + } else { + spin_lock(&mdsc->caps_list_lock); + if (mdsc->caps_avail_count) { + BUG_ON(list_empty(&mdsc->caps_list)); + + mdsc->caps_avail_count--; + mdsc->caps_use_count++; + cap = list_first_entry(&mdsc->caps_list, + struct ceph_cap, caps_item); + list_del(&cap->caps_item); + + BUG_ON(mdsc->caps_total_count != mdsc->caps_use_count + + mdsc->caps_reserve_count + mdsc->caps_avail_count); + } + spin_unlock(&mdsc->caps_list_lock); } + return cap; } -- cgit v1.2.3-59-g8ed1b From b517c1d87faafba0c33a38ffdd551e8b399f0a31 Mon Sep 17 00:00:00 2001 From: Chengguang Xu Date: Sun, 25 Feb 2018 13:39:09 +0800 Subject: ceph: release unreserved caps if having enough available caps When unreserving caps check if there is too mamy available caps in the ->caps_list, if so release unreserved caps. Signed-off-by: Chengguang Xu Reviewed-by: "Yan, Zheng" Signed-off-by: Ilya Dryomov --- fs/ceph/caps.c | 16 +++++++++++++++- 1 file changed, 15 insertions(+), 1 deletion(-) diff --git a/fs/ceph/caps.c b/fs/ceph/caps.c index 421cdce71fb0..b9b5c47efd06 100644 --- a/fs/ceph/caps.c +++ b/fs/ceph/caps.c @@ -254,12 +254,26 @@ out_nomem: int ceph_unreserve_caps(struct ceph_mds_client *mdsc, struct ceph_cap_reservation *ctx) { + int i; + struct ceph_cap *cap; + dout("unreserve caps ctx=%p count=%d\n", ctx, ctx->count); if (ctx->count) { spin_lock(&mdsc->caps_list_lock); BUG_ON(mdsc->caps_reserve_count < ctx->count); mdsc->caps_reserve_count -= ctx->count; - mdsc->caps_avail_count += ctx->count; + if (mdsc->caps_avail_count >= + mdsc->caps_reserve_count + mdsc->caps_min_count) { + mdsc->caps_total_count -= ctx->count; + for (i = 0; i < ctx->count; i++) { + cap = list_first_entry(&mdsc->caps_list, + struct ceph_cap, caps_item); + list_del(&cap->caps_item); + kmem_cache_free(ceph_cap_cachep, cap); + } + } else { + mdsc->caps_avail_count += ctx->count; + } ctx->count = 0; dout("unreserve caps %d = %d used + %d resv + %d avail\n", mdsc->caps_total_count, mdsc->caps_use_count, -- cgit v1.2.3-59-g8ed1b From 79cd674aed7363a043222af3c8f97d0ea0a078cf Mon Sep 17 00:00:00 2001 From: Chengguang Xu Date: Sat, 24 Feb 2018 18:36:02 +0800 Subject: ceph: optimizing cap reservation When caps_avail_count is in a low level, most newly trimmed caps will probably go into ->caps_list and caps_avail_count will be increased. Hence after trimming, should recheck caps_avail_count to effectly reuse newly trimmed caps. Also, when releasing unnecessary caps follow the same rule of ceph_put_cap. Signed-off-by: Chengguang Xu Reviewed-by: "Yan, Zheng" Signed-off-by: Ilya Dryomov --- fs/ceph/caps.c | 88 +++++++++++++++++++++++++++++++++++++++------------------- 1 file changed, 59 insertions(+), 29 deletions(-) diff --git a/fs/ceph/caps.c b/fs/ceph/caps.c index b9b5c47efd06..25141b6683e9 100644 --- a/fs/ceph/caps.c +++ b/fs/ceph/caps.c @@ -184,36 +184,54 @@ int ceph_reserve_caps(struct ceph_mds_client *mdsc, mdsc->caps_avail_count); spin_unlock(&mdsc->caps_list_lock); - for (i = have; i < need; i++) { -retry: + for (i = have; i < need; ) { cap = kmem_cache_alloc(ceph_cap_cachep, GFP_NOFS); - if (!cap) { - if (!trimmed) { - for (j = 0; j < mdsc->max_sessions; j++) { - s = __ceph_lookup_mds_session(mdsc, j); - if (!s) - continue; - mutex_unlock(&mdsc->mutex); + if (cap) { + list_add(&cap->caps_item, &newcaps); + alloc++; + i++; + continue; + } - mutex_lock(&s->s_mutex); - max_caps = s->s_nr_caps - (need - i); - ceph_trim_caps(mdsc, s, max_caps); - mutex_unlock(&s->s_mutex); + if (!trimmed) { + for (j = 0; j < mdsc->max_sessions; j++) { + s = __ceph_lookup_mds_session(mdsc, j); + if (!s) + continue; + mutex_unlock(&mdsc->mutex); - ceph_put_mds_session(s); - mutex_lock(&mdsc->mutex); - } - trimmed = true; - goto retry; - } else { - pr_warn("reserve caps ctx=%p ENOMEM " - "need=%d got=%d\n", - ctx, need, have + alloc); - goto out_nomem; + mutex_lock(&s->s_mutex); + max_caps = s->s_nr_caps - (need - i); + ceph_trim_caps(mdsc, s, max_caps); + mutex_unlock(&s->s_mutex); + + ceph_put_mds_session(s); + mutex_lock(&mdsc->mutex); } + trimmed = true; + + spin_lock(&mdsc->caps_list_lock); + if (mdsc->caps_avail_count) { + int more_have; + if (mdsc->caps_avail_count >= need - i) + more_have = need - i; + else + more_have = mdsc->caps_avail_count; + + i += more_have; + have += more_have; + mdsc->caps_avail_count -= more_have; + mdsc->caps_reserve_count += more_have; + + } + spin_unlock(&mdsc->caps_list_lock); + + continue; } - list_add(&cap->caps_item, &newcaps); - alloc++; + + pr_warn("reserve caps ctx=%p ENOMEM need=%d got=%d\n", + ctx, need, have + alloc); + goto out_nomem; } BUG_ON(have + alloc != need); @@ -234,16 +252,28 @@ retry: return 0; out_nomem: + + spin_lock(&mdsc->caps_list_lock); + mdsc->caps_avail_count += have; + mdsc->caps_reserve_count -= have; + while (!list_empty(&newcaps)) { cap = list_first_entry(&newcaps, struct ceph_cap, caps_item); list_del(&cap->caps_item); - kmem_cache_free(ceph_cap_cachep, cap); + + /* Keep some preallocated caps around (ceph_min_count), to + * avoid lots of free/alloc churn. */ + if (mdsc->caps_avail_count >= + mdsc->caps_reserve_count + mdsc->caps_min_count) { + kmem_cache_free(ceph_cap_cachep, cap); + } else { + mdsc->caps_avail_count++; + mdsc->caps_total_count++; + list_add(&cap->caps_item, &mdsc->caps_list); + } } - spin_lock(&mdsc->caps_list_lock); - mdsc->caps_avail_count += have; - mdsc->caps_reserve_count -= have; BUG_ON(mdsc->caps_total_count != mdsc->caps_use_count + mdsc->caps_reserve_count + mdsc->caps_avail_count); -- cgit v1.2.3-59-g8ed1b From 73737682e0598ae73bd4c481e478a0d75884aa8a Mon Sep 17 00:00:00 2001 From: Chengguang Xu Date: Wed, 28 Feb 2018 19:43:47 +0800 Subject: ceph: change variable name to follow common rule Variable name ci is mostly used for ceph_inode_info. Variable name fi is mostly used for ceph_file_info. Variable name cf is mostly used for ceph_cap_flush. Change variable name to follow above common rules in case of confusing. Signed-off-by: Chengguang Xu Reviewed-by: "Yan, Zheng" Signed-off-by: Ilya Dryomov --- fs/ceph/addr.c | 4 ++-- fs/ceph/dir.c | 18 +++++++++--------- fs/ceph/file.c | 38 +++++++++++++++++++------------------- 3 files changed, 30 insertions(+), 30 deletions(-) diff --git a/fs/ceph/addr.c b/fs/ceph/addr.c index c3557a9ea73d..4b3cf53d5641 100644 --- a/fs/ceph/addr.c +++ b/fs/ceph/addr.c @@ -439,7 +439,7 @@ static int ceph_readpages(struct file *file, struct address_space *mapping, { struct inode *inode = file_inode(file); struct ceph_fs_client *fsc = ceph_inode_to_client(inode); - struct ceph_file_info *ci = file->private_data; + struct ceph_file_info *fi = file->private_data; struct ceph_rw_context *rw_ctx; int rc = 0; int max = 0; @@ -453,7 +453,7 @@ static int ceph_readpages(struct file *file, struct address_space *mapping, if (rc == 0) goto out; - rw_ctx = ceph_find_rw_context(ci); + rw_ctx = ceph_find_rw_context(fi); max = fsc->mount_options->rsize >> PAGE_SHIFT; dout("readpages %p file %p ctx %p nr_pages %d max %d\n", inode, file, rw_ctx, nr_pages, max); diff --git a/fs/ceph/dir.c b/fs/ceph/dir.c index b7771e9e0c71..1aa3bfc9ef35 100644 --- a/fs/ceph/dir.c +++ b/fs/ceph/dir.c @@ -1352,7 +1352,7 @@ static void ceph_d_prune(struct dentry *dentry) static ssize_t ceph_read_dir(struct file *file, char __user *buf, size_t size, loff_t *ppos) { - struct ceph_file_info *cf = file->private_data; + struct ceph_file_info *fi = file->private_data; struct inode *inode = file_inode(file); struct ceph_inode_info *ci = ceph_inode(inode); int left; @@ -1361,12 +1361,12 @@ static ssize_t ceph_read_dir(struct file *file, char __user *buf, size_t size, if (!ceph_test_mount_opt(ceph_sb_to_client(inode->i_sb), DIRSTAT)) return -EISDIR; - if (!cf->dir_info) { - cf->dir_info = kmalloc(bufsize, GFP_KERNEL); - if (!cf->dir_info) + if (!fi->dir_info) { + fi->dir_info = kmalloc(bufsize, GFP_KERNEL); + if (!fi->dir_info) return -ENOMEM; - cf->dir_info_len = - snprintf(cf->dir_info, bufsize, + fi->dir_info_len = + snprintf(fi->dir_info, bufsize, "entries: %20lld\n" " files: %20lld\n" " subdirs: %20lld\n" @@ -1386,10 +1386,10 @@ static ssize_t ceph_read_dir(struct file *file, char __user *buf, size_t size, (long)ci->i_rctime.tv_nsec); } - if (*ppos >= cf->dir_info_len) + if (*ppos >= fi->dir_info_len) return 0; - size = min_t(unsigned, size, cf->dir_info_len-*ppos); - left = copy_to_user(buf, cf->dir_info + *ppos, size); + size = min_t(unsigned, size, fi->dir_info_len-*ppos); + left = copy_to_user(buf, fi->dir_info + *ppos, size); if (left == size) return -EFAULT; *ppos += (size - left); diff --git a/fs/ceph/file.c b/fs/ceph/file.c index c80eb1d93b41..df9f435c5260 100644 --- a/fs/ceph/file.c +++ b/fs/ceph/file.c @@ -165,7 +165,7 @@ out: */ static int ceph_init_file(struct inode *inode, struct file *file, int fmode) { - struct ceph_file_info *cf; + struct ceph_file_info *fi; int ret = 0; switch (inode->i_mode & S_IFMT) { @@ -175,19 +175,19 @@ static int ceph_init_file(struct inode *inode, struct file *file, int fmode) case S_IFDIR: dout("init_file %p %p 0%o (regular)\n", inode, file, inode->i_mode); - cf = kmem_cache_zalloc(ceph_file_cachep, GFP_KERNEL); - if (!cf) { + fi = kmem_cache_zalloc(ceph_file_cachep, GFP_KERNEL); + if (!fi) { ceph_put_fmode(ceph_inode(inode), fmode); /* clean up */ return -ENOMEM; } - cf->fmode = fmode; + fi->fmode = fmode; - spin_lock_init(&cf->rw_contexts_lock); - INIT_LIST_HEAD(&cf->rw_contexts); + spin_lock_init(&fi->rw_contexts_lock); + INIT_LIST_HEAD(&fi->rw_contexts); - cf->next_offset = 2; - cf->readdir_cache_idx = -1; - file->private_data = cf; + fi->next_offset = 2; + fi->readdir_cache_idx = -1; + file->private_data = fi; BUG_ON(inode->i_fop->release != ceph_release); break; @@ -278,11 +278,11 @@ int ceph_open(struct inode *inode, struct file *file) struct ceph_fs_client *fsc = ceph_sb_to_client(inode->i_sb); struct ceph_mds_client *mdsc = fsc->mdsc; struct ceph_mds_request *req; - struct ceph_file_info *cf = file->private_data; + struct ceph_file_info *fi = file->private_data; int err; int flags, fmode, wanted; - if (cf) { + if (fi) { dout("open file %p is already opened\n", file); return 0; } @@ -460,16 +460,16 @@ out_acl: int ceph_release(struct inode *inode, struct file *file) { struct ceph_inode_info *ci = ceph_inode(inode); - struct ceph_file_info *cf = file->private_data; + struct ceph_file_info *fi = file->private_data; dout("release inode %p file %p\n", inode, file); - ceph_put_fmode(ci, cf->fmode); - if (cf->last_readdir) - ceph_mdsc_put_request(cf->last_readdir); - kfree(cf->last_name); - kfree(cf->dir_info); - WARN_ON(!list_empty(&cf->rw_contexts)); - kmem_cache_free(ceph_file_cachep, cf); + ceph_put_fmode(ci, fi->fmode); + if (fi->last_readdir) + ceph_mdsc_put_request(fi->last_readdir); + kfree(fi->last_name); + kfree(fi->dir_info); + WARN_ON(!list_empty(&fi->rw_contexts)); + kmem_cache_free(ceph_file_cachep, fi); /* wake up anyone waiting for caps on this inode */ wake_up_all(&ci->i_cap_wq); -- cgit v1.2.3-59-g8ed1b From bc4b5ad3a6a1cfe11494380affc4bfc4521af499 Mon Sep 17 00:00:00 2001 From: Chengguang Xu Date: Tue, 27 Feb 2018 13:49:44 +0800 Subject: ceph: mark the cap cache as unreclaimable Releasing cap is affected by many factors (e.g., avail_count/reserve_count/min_count) and min_count could be specified high volume in client mount option. Hence it's better to mark cap cache as unreclaimable in case of non-trivial discrepancies between memory shown as reclaimable and what is actually reclaimed. Signed-off-by: Chengguang Xu Reviewed-by: "Yan, Zheng" Signed-off-by: Ilya Dryomov --- fs/ceph/super.c | 3 +-- 1 file changed, 1 insertion(+), 2 deletions(-) diff --git a/fs/ceph/super.c b/fs/ceph/super.c index 52fec209f0a6..9bf9e54259dd 100644 --- a/fs/ceph/super.c +++ b/fs/ceph/super.c @@ -698,8 +698,7 @@ static int __init init_caches(void) if (!ceph_inode_cachep) return -ENOMEM; - ceph_cap_cachep = KMEM_CACHE(ceph_cap, - SLAB_RECLAIM_ACCOUNT|SLAB_MEM_SPREAD); + ceph_cap_cachep = KMEM_CACHE(ceph_cap, SLAB_MEM_SPREAD); if (!ceph_cap_cachep) goto bad_cap; ceph_cap_flush_cachep = KMEM_CACHE(ceph_cap_flush, -- cgit v1.2.3-59-g8ed1b From af9cc401ce7452f9d965ba4553d8ffe7f0ed42ee Mon Sep 17 00:00:00 2001 From: "Yan, Zheng" Date: Sun, 4 Mar 2018 16:36:01 +0800 Subject: ceph: invalidate pages that beyond EOF in ceph_writepages_start() Dirty pages can be associated with different capsnap. Different capsnap may have different EOF value. So invalidating dirty pages according to the largest EOF value is wrong. Dirty pages beyond EOF, but associated with other capsnap, do not get invalidated. Signed-off-by: "Yan, Zheng" Signed-off-by: Ilya Dryomov --- fs/ceph/addr.c | 36 ++++++++++++++++++------------------ fs/ceph/inode.c | 11 ----------- 2 files changed, 18 insertions(+), 29 deletions(-) diff --git a/fs/ceph/addr.c b/fs/ceph/addr.c index 4b3cf53d5641..3376822a624e 100644 --- a/fs/ceph/addr.c +++ b/fs/ceph/addr.c @@ -801,7 +801,7 @@ static int ceph_writepages_start(struct address_space *mapping, struct ceph_osd_request *req = NULL; struct ceph_writeback_ctl ceph_wbc; bool should_loop, range_whole = false; - bool stop, done = false; + bool done = false; dout("writepages_start %p (mode=%s)\n", inode, wbc->sync_mode == WB_SYNC_NONE ? "NONE" : @@ -865,8 +865,7 @@ retry: ceph_put_snap_context(last_snapc); last_snapc = snapc; - stop = false; - while (!stop && index <= end) { + while (!done && index <= end) { int num_ops = 0, op_idx; unsigned i, pvec_pages, max_pages, locked_pages = 0; struct page **pages = NULL, **data_pages; @@ -899,16 +898,26 @@ get_more_pages: unlock_page(page); continue; } - if (strip_unit_end && (page->index > strip_unit_end)) { - dout("end of strip unit %p\n", page); + /* only if matching snap context */ + pgsnapc = page_snap_context(page); + if (pgsnapc != snapc) { + dout("page snapc %p %lld != oldest %p %lld\n", + pgsnapc, pgsnapc->seq, snapc, snapc->seq); unlock_page(page); - break; + continue; } if (page_offset(page) >= ceph_wbc.i_size) { dout("%p page eof %llu\n", page, ceph_wbc.i_size); - /* not done if range_cyclic */ - stop = true; + if (ceph_wbc.size_stable || + page_offset(page) >= i_size_read(inode)) + mapping->a_ops->invalidatepage(page, + 0, PAGE_SIZE); + unlock_page(page); + continue; + } + if (strip_unit_end && (page->index > strip_unit_end)) { + dout("end of strip unit %p\n", page); unlock_page(page); break; } @@ -922,15 +931,6 @@ get_more_pages: wait_on_page_writeback(page); } - /* only if matching snap context */ - pgsnapc = page_snap_context(page); - if (pgsnapc != snapc) { - dout("page snapc %p %lld != oldest %p %lld\n", - pgsnapc, pgsnapc->seq, snapc, snapc->seq); - unlock_page(page); - continue; - } - if (!clear_page_dirty_for_io(page)) { dout("%p !clear_page_dirty_for_io\n", page); unlock_page(page); @@ -1143,7 +1143,7 @@ new_request: * we tagged for writeback prior to entering this loop. */ if (wbc->nr_to_write <= 0 && wbc->sync_mode == WB_SYNC_NONE) - done = stop = true; + done = true; release_pvec_pages: dout("pagevec_release on %d pages (%p)\n", (int)pvec.nr, diff --git a/fs/ceph/inode.c b/fs/ceph/inode.c index c6ec5aa46100..be5f12d0d637 100644 --- a/fs/ceph/inode.c +++ b/fs/ceph/inode.c @@ -1867,20 +1867,9 @@ retry: * possibly truncate them.. so write AND block! */ if (ci->i_wrbuffer_ref_head < ci->i_wrbuffer_ref) { - struct ceph_cap_snap *capsnap; - to = ci->i_truncate_size; - list_for_each_entry(capsnap, &ci->i_cap_snaps, ci_item) { - // MDS should have revoked Frw caps - WARN_ON_ONCE(capsnap->writing); - if (capsnap->dirty_pages && capsnap->size > to) - to = capsnap->size; - } spin_unlock(&ci->i_ceph_lock); dout("__do_pending_vmtruncate %p flushing snaps first\n", inode); - - truncate_pagecache(inode, to); - filemap_write_and_wait_range(&inode->i_data, 0, inode->i_sb->s_maxbytes); goto retry; -- cgit v1.2.3-59-g8ed1b From 1582af2eaaf17cbcd7864172347c1db10b6b2210 Mon Sep 17 00:00:00 2001 From: "Yan, Zheng" Date: Tue, 6 Mar 2018 15:14:54 +0800 Subject: ceph: don't wait on writeback when there is no more dirty pages In sync mode, writepages() needs to write all dirty pages. But it can only write dirty pages associated with the oldest snapc. To write dirty pages associated with next snapc, it needs to wait until current writes complete. If there is no more dirty pages, writepages() should not wait on writeback. Otherwise, dirty page writeback becomes very slow. Signed-off-by: "Yan, Zheng" Signed-off-by: Ilya Dryomov --- fs/ceph/addr.c | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) diff --git a/fs/ceph/addr.c b/fs/ceph/addr.c index 3376822a624e..5f7ad3d0df2e 100644 --- a/fs/ceph/addr.c +++ b/fs/ceph/addr.c @@ -857,7 +857,7 @@ retry: * in that range can be associated with newer snapc. * They are not writeable until we write all dirty pages * associated with 'snapc' get written */ - if (index > 0 || wbc->sync_mode != WB_SYNC_NONE) + if (index > 0) should_loop = true; dout(" non-head snapc, range whole\n"); } @@ -903,6 +903,10 @@ get_more_pages: if (pgsnapc != snapc) { dout("page snapc %p %lld != oldest %p %lld\n", pgsnapc, pgsnapc->seq, snapc, snapc->seq); + if (!should_loop && + !ceph_wbc.head_snapc && + wbc->sync_mode != WB_SYNC_NONE) + should_loop = true; unlock_page(page); continue; } -- cgit v1.2.3-59-g8ed1b From 51b10f3fe446f536b6edf90ce6941882033dd93b Mon Sep 17 00:00:00 2001 From: Chengguang Xu Date: Fri, 9 Mar 2018 15:12:40 +0800 Subject: ceph: filter out used flags when printing unused open flags Filter out used access mode flags when printing unused open flags. Signed-off-by: Chengguang Xu Reviewed-by: "Yan, Zheng" Signed-off-by: Ilya Dryomov --- fs/ceph/file.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/fs/ceph/file.c b/fs/ceph/file.c index df9f435c5260..a1f0aee29c27 100644 --- a/fs/ceph/file.c +++ b/fs/ceph/file.c @@ -30,6 +30,8 @@ static __le32 ceph_flags_sys2wire(u32 flags) break; } + flags &= ~O_ACCMODE; + #define ceph_sys2wire(a) if (flags & a) { wire_flags |= CEPH_##a; flags &= ~a; } ceph_sys2wire(O_CREAT); -- cgit v1.2.3-59-g8ed1b From 57a35dfb522c8bbac622d49f5217906f9b5eceb0 Mon Sep 17 00:00:00 2001 From: Chengguang Xu Date: Sat, 10 Mar 2018 20:32:05 +0800 Subject: libceph, ceph: add __init attribution to init funcitons Add __init attribution to the functions which are called only once during initiating/registering operations and deleting unnecessary symbol exports. Signed-off-by: Chengguang Xu Reviewed-by: Ilya Dryomov Signed-off-by: Ilya Dryomov --- fs/ceph/cache.c | 2 +- net/ceph/crypto.c | 6 ++++-- net/ceph/debugfs.c | 7 ++----- net/ceph/messenger.c | 4 +--- net/ceph/osd_client.c | 4 +--- 5 files changed, 9 insertions(+), 14 deletions(-) diff --git a/fs/ceph/cache.c b/fs/ceph/cache.c index 3781f723ff31..797cc8160199 100644 --- a/fs/ceph/cache.c +++ b/fs/ceph/cache.c @@ -71,7 +71,7 @@ static const struct fscache_cookie_def ceph_fscache_fsid_object_def = { .get_key = ceph_fscache_session_get_key, }; -int ceph_fscache_register(void) +int __init ceph_fscache_register(void) { return fscache_register_netfs(&ceph_cache_netfs); } diff --git a/net/ceph/crypto.c b/net/ceph/crypto.c index bf9d079cbafd..02172c408ff2 100644 --- a/net/ceph/crypto.c +++ b/net/ceph/crypto.c @@ -347,10 +347,12 @@ struct key_type key_type_ceph = { .destroy = ceph_key_destroy, }; -int ceph_crypto_init(void) { +int __init ceph_crypto_init(void) +{ return register_key_type(&key_type_ceph); } -void ceph_crypto_shutdown(void) { +void ceph_crypto_shutdown(void) +{ unregister_key_type(&key_type_ceph); } diff --git a/net/ceph/debugfs.c b/net/ceph/debugfs.c index 0ef0f32a4570..02952605d121 100644 --- a/net/ceph/debugfs.c +++ b/net/ceph/debugfs.c @@ -389,7 +389,7 @@ CEPH_DEFINE_SHOW_FUNC(monc_show) CEPH_DEFINE_SHOW_FUNC(osdc_show) CEPH_DEFINE_SHOW_FUNC(client_options_show) -int ceph_debugfs_init(void) +int __init ceph_debugfs_init(void) { ceph_debugfs_dir = debugfs_create_dir("ceph", NULL); if (!ceph_debugfs_dir) @@ -477,7 +477,7 @@ void ceph_debugfs_client_cleanup(struct ceph_client *client) #else /* CONFIG_DEBUG_FS */ -int ceph_debugfs_init(void) +int __init ceph_debugfs_init(void) { return 0; } @@ -496,6 +496,3 @@ void ceph_debugfs_client_cleanup(struct ceph_client *client) } #endif /* CONFIG_DEBUG_FS */ - -EXPORT_SYMBOL(ceph_debugfs_init); -EXPORT_SYMBOL(ceph_debugfs_cleanup); diff --git a/net/ceph/messenger.c b/net/ceph/messenger.c index cee4b3d307de..fcb40c12b1f8 100644 --- a/net/ceph/messenger.c +++ b/net/ceph/messenger.c @@ -277,7 +277,7 @@ static void _ceph_msgr_exit(void) ceph_msgr_slab_exit(); } -int ceph_msgr_init(void) +int __init ceph_msgr_init(void) { if (ceph_msgr_slab_init()) return -ENOMEM; @@ -299,7 +299,6 @@ int ceph_msgr_init(void) return -ENOMEM; } -EXPORT_SYMBOL(ceph_msgr_init); void ceph_msgr_exit(void) { @@ -307,7 +306,6 @@ void ceph_msgr_exit(void) _ceph_msgr_exit(); } -EXPORT_SYMBOL(ceph_msgr_exit); void ceph_msgr_flush(void) { diff --git a/net/ceph/osd_client.c b/net/ceph/osd_client.c index 4a3af96dc057..ea2a6c9fb7ce 100644 --- a/net/ceph/osd_client.c +++ b/net/ceph/osd_client.c @@ -5106,7 +5106,7 @@ int ceph_osdc_writepages(struct ceph_osd_client *osdc, struct ceph_vino vino, } EXPORT_SYMBOL(ceph_osdc_writepages); -int ceph_osdc_setup(void) +int __init ceph_osdc_setup(void) { size_t size = sizeof(struct ceph_osd_request) + CEPH_OSD_SLAB_OPS * sizeof(struct ceph_osd_req_op); @@ -5117,7 +5117,6 @@ int ceph_osdc_setup(void) return ceph_osd_request_cache ? 0 : -ENOMEM; } -EXPORT_SYMBOL(ceph_osdc_setup); void ceph_osdc_cleanup(void) { @@ -5125,7 +5124,6 @@ void ceph_osdc_cleanup(void) kmem_cache_destroy(ceph_osd_request_cache); ceph_osd_request_cache = NULL; } -EXPORT_SYMBOL(ceph_osdc_cleanup); /* * handle incoming message -- cgit v1.2.3-59-g8ed1b From 47474d0b011bb385719e91a60bb9ff7649d66526 Mon Sep 17 00:00:00 2001 From: Chengguang Xu Date: Tue, 13 Mar 2018 23:01:07 +0800 Subject: ceph: optimize mds session register Do memory allocation first, so that avoid unnecessary initialization of newly allocated session in error case. Signed-off-by: Chengguang Xu Reviewed-by: "Yan, Zheng" Signed-off-by: Ilya Dryomov --- fs/ceph/mds_client.c | 36 +++++++++++++++++++----------------- 1 file changed, 19 insertions(+), 17 deletions(-) diff --git a/fs/ceph/mds_client.c b/fs/ceph/mds_client.c index b9cbeeb32ab3..a511a777ffb9 100644 --- a/fs/ceph/mds_client.c +++ b/fs/ceph/mds_client.c @@ -448,6 +448,25 @@ static struct ceph_mds_session *register_session(struct ceph_mds_client *mdsc, s = kzalloc(sizeof(*s), GFP_NOFS); if (!s) return ERR_PTR(-ENOMEM); + + if (mds >= mdsc->max_sessions) { + int newmax = 1 << get_count_order(mds + 1); + struct ceph_mds_session **sa; + + dout("%s: realloc to %d\n", __func__, newmax); + sa = kcalloc(newmax, sizeof(void *), GFP_NOFS); + if (!sa) + goto fail_realloc; + if (mdsc->sessions) { + memcpy(sa, mdsc->sessions, + mdsc->max_sessions * sizeof(void *)); + kfree(mdsc->sessions); + } + mdsc->sessions = sa; + mdsc->max_sessions = newmax; + } + + dout("%s: mds%d\n", __func__, mds); s->s_mdsc = mdsc; s->s_mds = mds; s->s_state = CEPH_MDS_SESSION_NEW; @@ -476,23 +495,6 @@ static struct ceph_mds_session *register_session(struct ceph_mds_client *mdsc, INIT_LIST_HEAD(&s->s_cap_releases); INIT_LIST_HEAD(&s->s_cap_flushing); - dout("register_session mds%d\n", mds); - if (mds >= mdsc->max_sessions) { - int newmax = 1 << get_count_order(mds+1); - struct ceph_mds_session **sa; - - dout("register_session realloc to %d\n", newmax); - sa = kcalloc(newmax, sizeof(void *), GFP_NOFS); - if (!sa) - goto fail_realloc; - if (mdsc->sessions) { - memcpy(sa, mdsc->sessions, - mdsc->max_sessions * sizeof(void *)); - kfree(mdsc->sessions); - } - mdsc->sessions = sa; - mdsc->max_sessions = newmax; - } mdsc->sessions[mds] = s; atomic_inc(&mdsc->num_sessions); refcount_inc(&s->s_ref); /* one ref to sessions[], one to caller */ -- cgit v1.2.3-59-g8ed1b From bb48bd4dc45f9ee1e44d8e9fcb01023e0d0ba80d Mon Sep 17 00:00:00 2001 From: Chengguang Xu Date: Tue, 13 Mar 2018 10:42:44 +0800 Subject: ceph: optimize memory usage In current code, regular file and directory use same struct ceph_file_info to store fs specific data so the struct has to include some fields which are only used for directory (e.g., readdir related info), when having plenty of regular files, it will lead to memory waste. This patch introduces dedicated ceph_dir_file_info cache for readdir related thins. So that regular file does not include those unused fields anymore. Signed-off-by: Chengguang Xu Reviewed-by: "Yan, Zheng" Signed-off-by: Ilya Dryomov --- fs/ceph/dir.c | 185 ++++++++++++++++++++++--------------------- fs/ceph/file.c | 88 ++++++++++++++------ fs/ceph/super.c | 8 ++ fs/ceph/super.h | 4 + include/linux/ceph/libceph.h | 1 + 5 files changed, 169 insertions(+), 117 deletions(-) diff --git a/fs/ceph/dir.c b/fs/ceph/dir.c index 1aa3bfc9ef35..16405e0774a6 100644 --- a/fs/ceph/dir.c +++ b/fs/ceph/dir.c @@ -102,18 +102,18 @@ static int fpos_cmp(loff_t l, loff_t r) * regardless of what dir changes take place on the * server. */ -static int note_last_dentry(struct ceph_file_info *fi, const char *name, +static int note_last_dentry(struct ceph_dir_file_info *dfi, const char *name, int len, unsigned next_offset) { char *buf = kmalloc(len+1, GFP_KERNEL); if (!buf) return -ENOMEM; - kfree(fi->last_name); - fi->last_name = buf; - memcpy(fi->last_name, name, len); - fi->last_name[len] = 0; - fi->next_offset = next_offset; - dout("note_last_dentry '%s'\n", fi->last_name); + kfree(dfi->last_name); + dfi->last_name = buf; + memcpy(dfi->last_name, name, len); + dfi->last_name[len] = 0; + dfi->next_offset = next_offset; + dout("note_last_dentry '%s'\n", dfi->last_name); return 0; } @@ -175,7 +175,7 @@ __dcache_find_get_entry(struct dentry *parent, u64 idx, static int __dcache_readdir(struct file *file, struct dir_context *ctx, int shared_gen) { - struct ceph_file_info *fi = file->private_data; + struct ceph_dir_file_info *dfi = file->private_data; struct dentry *parent = file->f_path.dentry; struct inode *dir = d_inode(parent); struct dentry *dentry, *last = NULL; @@ -222,7 +222,7 @@ static int __dcache_readdir(struct file *file, struct dir_context *ctx, bool emit_dentry = false; dentry = __dcache_find_get_entry(parent, idx++, &cache_ctl); if (!dentry) { - fi->flags |= CEPH_F_ATEND; + dfi->file_info.flags |= CEPH_F_ATEND; err = 0; break; } @@ -273,33 +273,33 @@ out: if (last) { int ret; di = ceph_dentry(last); - ret = note_last_dentry(fi, last->d_name.name, last->d_name.len, + ret = note_last_dentry(dfi, last->d_name.name, last->d_name.len, fpos_off(di->offset) + 1); if (ret < 0) err = ret; dput(last); /* last_name no longer match cache index */ - if (fi->readdir_cache_idx >= 0) { - fi->readdir_cache_idx = -1; - fi->dir_release_count = 0; + if (dfi->readdir_cache_idx >= 0) { + dfi->readdir_cache_idx = -1; + dfi->dir_release_count = 0; } } return err; } -static bool need_send_readdir(struct ceph_file_info *fi, loff_t pos) +static bool need_send_readdir(struct ceph_dir_file_info *dfi, loff_t pos) { - if (!fi->last_readdir) + if (!dfi->last_readdir) return true; if (is_hash_order(pos)) - return !ceph_frag_contains_value(fi->frag, fpos_hash(pos)); + return !ceph_frag_contains_value(dfi->frag, fpos_hash(pos)); else - return fi->frag != fpos_frag(pos); + return dfi->frag != fpos_frag(pos); } static int ceph_readdir(struct file *file, struct dir_context *ctx) { - struct ceph_file_info *fi = file->private_data; + struct ceph_dir_file_info *dfi = file->private_data; struct inode *inode = file_inode(file); struct ceph_inode_info *ci = ceph_inode(inode); struct ceph_fs_client *fsc = ceph_inode_to_client(inode); @@ -310,7 +310,7 @@ static int ceph_readdir(struct file *file, struct dir_context *ctx) struct ceph_mds_reply_info_parsed *rinfo; dout("readdir %p file %p pos %llx\n", inode, file, ctx->pos); - if (fi->flags & CEPH_F_ATEND) + if (dfi->file_info.flags & CEPH_F_ATEND) return 0; /* always start with . and .. */ @@ -351,15 +351,15 @@ static int ceph_readdir(struct file *file, struct dir_context *ctx) /* proceed with a normal readdir */ more: /* do we have the correct frag content buffered? */ - if (need_send_readdir(fi, ctx->pos)) { + if (need_send_readdir(dfi, ctx->pos)) { struct ceph_mds_request *req; int op = ceph_snap(inode) == CEPH_SNAPDIR ? CEPH_MDS_OP_LSSNAP : CEPH_MDS_OP_READDIR; /* discard old result, if any */ - if (fi->last_readdir) { - ceph_mdsc_put_request(fi->last_readdir); - fi->last_readdir = NULL; + if (dfi->last_readdir) { + ceph_mdsc_put_request(dfi->last_readdir); + dfi->last_readdir = NULL; } if (is_hash_order(ctx->pos)) { @@ -373,7 +373,7 @@ more: } dout("readdir fetching %llx.%llx frag %x offset '%s'\n", - ceph_vinop(inode), frag, fi->last_name); + ceph_vinop(inode), frag, dfi->last_name); req = ceph_mdsc_create_request(mdsc, op, USE_AUTH_MDS); if (IS_ERR(req)) return PTR_ERR(req); @@ -389,8 +389,8 @@ more: __set_bit(CEPH_MDS_R_DIRECT_IS_HASH, &req->r_req_flags); req->r_inode_drop = CEPH_CAP_FILE_EXCL; } - if (fi->last_name) { - req->r_path2 = kstrdup(fi->last_name, GFP_KERNEL); + if (dfi->last_name) { + req->r_path2 = kstrdup(dfi->last_name, GFP_KERNEL); if (!req->r_path2) { ceph_mdsc_put_request(req); return -ENOMEM; @@ -400,10 +400,10 @@ more: cpu_to_le32(fpos_hash(ctx->pos)); } - req->r_dir_release_cnt = fi->dir_release_count; - req->r_dir_ordered_cnt = fi->dir_ordered_count; - req->r_readdir_cache_idx = fi->readdir_cache_idx; - req->r_readdir_offset = fi->next_offset; + req->r_dir_release_cnt = dfi->dir_release_count; + req->r_dir_ordered_cnt = dfi->dir_ordered_count; + req->r_readdir_cache_idx = dfi->readdir_cache_idx; + req->r_readdir_offset = dfi->next_offset; req->r_args.readdir.frag = cpu_to_le32(frag); req->r_args.readdir.flags = cpu_to_le16(CEPH_READDIR_REPLY_BITFLAGS); @@ -427,35 +427,35 @@ more: if (le32_to_cpu(rinfo->dir_dir->frag) != frag) { frag = le32_to_cpu(rinfo->dir_dir->frag); if (!rinfo->hash_order) { - fi->next_offset = req->r_readdir_offset; + dfi->next_offset = req->r_readdir_offset; /* adjust ctx->pos to beginning of frag */ ctx->pos = ceph_make_fpos(frag, - fi->next_offset, + dfi->next_offset, false); } } - fi->frag = frag; - fi->last_readdir = req; + dfi->frag = frag; + dfi->last_readdir = req; if (test_bit(CEPH_MDS_R_DID_PREPOPULATE, &req->r_req_flags)) { - fi->readdir_cache_idx = req->r_readdir_cache_idx; - if (fi->readdir_cache_idx < 0) { + dfi->readdir_cache_idx = req->r_readdir_cache_idx; + if (dfi->readdir_cache_idx < 0) { /* preclude from marking dir ordered */ - fi->dir_ordered_count = 0; + dfi->dir_ordered_count = 0; } else if (ceph_frag_is_leftmost(frag) && - fi->next_offset == 2) { + dfi->next_offset == 2) { /* note dir version at start of readdir so * we can tell if any dentries get dropped */ - fi->dir_release_count = req->r_dir_release_cnt; - fi->dir_ordered_count = req->r_dir_ordered_cnt; + dfi->dir_release_count = req->r_dir_release_cnt; + dfi->dir_ordered_count = req->r_dir_ordered_cnt; } } else { dout("readdir !did_prepopulate\n"); /* disable readdir cache */ - fi->readdir_cache_idx = -1; + dfi->readdir_cache_idx = -1; /* preclude from marking dir complete */ - fi->dir_release_count = 0; + dfi->dir_release_count = 0; } /* note next offset and last dentry name */ @@ -464,19 +464,19 @@ more: rinfo->dir_entries + (rinfo->dir_nr-1); unsigned next_offset = req->r_reply_info.dir_end ? 2 : (fpos_off(rde->offset) + 1); - err = note_last_dentry(fi, rde->name, rde->name_len, + err = note_last_dentry(dfi, rde->name, rde->name_len, next_offset); if (err) return err; } else if (req->r_reply_info.dir_end) { - fi->next_offset = 2; + dfi->next_offset = 2; /* keep last name */ } } - rinfo = &fi->last_readdir->r_reply_info; + rinfo = &dfi->last_readdir->r_reply_info; dout("readdir frag %x num %d pos %llx chunk first %llx\n", - fi->frag, rinfo->dir_nr, ctx->pos, + dfi->frag, rinfo->dir_nr, ctx->pos, rinfo->dir_nr ? rinfo->dir_entries[0].offset : 0LL); i = 0; @@ -520,52 +520,55 @@ more: ctx->pos++; } - ceph_mdsc_put_request(fi->last_readdir); - fi->last_readdir = NULL; + ceph_mdsc_put_request(dfi->last_readdir); + dfi->last_readdir = NULL; - if (fi->next_offset > 2) { - frag = fi->frag; + if (dfi->next_offset > 2) { + frag = dfi->frag; goto more; } /* more frags? */ - if (!ceph_frag_is_rightmost(fi->frag)) { - frag = ceph_frag_next(fi->frag); + if (!ceph_frag_is_rightmost(dfi->frag)) { + frag = ceph_frag_next(dfi->frag); if (is_hash_order(ctx->pos)) { loff_t new_pos = ceph_make_fpos(ceph_frag_value(frag), - fi->next_offset, true); + dfi->next_offset, true); if (new_pos > ctx->pos) ctx->pos = new_pos; /* keep last_name */ } else { - ctx->pos = ceph_make_fpos(frag, fi->next_offset, false); - kfree(fi->last_name); - fi->last_name = NULL; + ctx->pos = ceph_make_fpos(frag, dfi->next_offset, + false); + kfree(dfi->last_name); + dfi->last_name = NULL; } dout("readdir next frag is %x\n", frag); goto more; } - fi->flags |= CEPH_F_ATEND; + dfi->file_info.flags |= CEPH_F_ATEND; /* * if dir_release_count still matches the dir, no dentries * were released during the whole readdir, and we should have * the complete dir contents in our cache. */ - if (atomic64_read(&ci->i_release_count) == fi->dir_release_count) { + if (atomic64_read(&ci->i_release_count) == + dfi->dir_release_count) { spin_lock(&ci->i_ceph_lock); - if (fi->dir_ordered_count == atomic64_read(&ci->i_ordered_count)) { + if (dfi->dir_ordered_count == + atomic64_read(&ci->i_ordered_count)) { dout(" marking %p complete and ordered\n", inode); /* use i_size to track number of entries in * readdir cache */ - BUG_ON(fi->readdir_cache_idx < 0); - i_size_write(inode, fi->readdir_cache_idx * + BUG_ON(dfi->readdir_cache_idx < 0); + i_size_write(inode, dfi->readdir_cache_idx * sizeof(struct dentry*)); } else { dout(" marking %p complete\n", inode); } - __ceph_dir_set_complete(ci, fi->dir_release_count, - fi->dir_ordered_count); + __ceph_dir_set_complete(ci, dfi->dir_release_count, + dfi->dir_ordered_count); spin_unlock(&ci->i_ceph_lock); } @@ -573,25 +576,25 @@ more: return 0; } -static void reset_readdir(struct ceph_file_info *fi) +static void reset_readdir(struct ceph_dir_file_info *dfi) { - if (fi->last_readdir) { - ceph_mdsc_put_request(fi->last_readdir); - fi->last_readdir = NULL; + if (dfi->last_readdir) { + ceph_mdsc_put_request(dfi->last_readdir); + dfi->last_readdir = NULL; } - kfree(fi->last_name); - fi->last_name = NULL; - fi->dir_release_count = 0; - fi->readdir_cache_idx = -1; - fi->next_offset = 2; /* compensate for . and .. */ - fi->flags &= ~CEPH_F_ATEND; + kfree(dfi->last_name); + dfi->last_name = NULL; + dfi->dir_release_count = 0; + dfi->readdir_cache_idx = -1; + dfi->next_offset = 2; /* compensate for . and .. */ + dfi->file_info.flags &= ~CEPH_F_ATEND; } /* * discard buffered readdir content on seekdir(0), or seek to new frag, * or seek prior to current chunk */ -static bool need_reset_readdir(struct ceph_file_info *fi, loff_t new_pos) +static bool need_reset_readdir(struct ceph_dir_file_info *dfi, loff_t new_pos) { struct ceph_mds_reply_info_parsed *rinfo; loff_t chunk_offset; @@ -600,10 +603,10 @@ static bool need_reset_readdir(struct ceph_file_info *fi, loff_t new_pos) if (is_hash_order(new_pos)) { /* no need to reset last_name for a forward seek when * dentries are sotred in hash order */ - } else if (fi->frag != fpos_frag(new_pos)) { + } else if (dfi->frag != fpos_frag(new_pos)) { return true; } - rinfo = fi->last_readdir ? &fi->last_readdir->r_reply_info : NULL; + rinfo = dfi->last_readdir ? &dfi->last_readdir->r_reply_info : NULL; if (!rinfo || !rinfo->dir_nr) return true; chunk_offset = rinfo->dir_entries[0].offset; @@ -613,7 +616,7 @@ static bool need_reset_readdir(struct ceph_file_info *fi, loff_t new_pos) static loff_t ceph_dir_llseek(struct file *file, loff_t offset, int whence) { - struct ceph_file_info *fi = file->private_data; + struct ceph_dir_file_info *dfi = file->private_data; struct inode *inode = file->f_mapping->host; loff_t retval; @@ -631,20 +634,20 @@ static loff_t ceph_dir_llseek(struct file *file, loff_t offset, int whence) } if (offset >= 0) { - if (need_reset_readdir(fi, offset)) { + if (need_reset_readdir(dfi, offset)) { dout("dir_llseek dropping %p content\n", file); - reset_readdir(fi); + reset_readdir(dfi); } else if (is_hash_order(offset) && offset > file->f_pos) { /* for hash offset, we don't know if a forward seek * is within same frag */ - fi->dir_release_count = 0; - fi->readdir_cache_idx = -1; + dfi->dir_release_count = 0; + dfi->readdir_cache_idx = -1; } if (offset != file->f_pos) { file->f_pos = offset; file->f_version = 0; - fi->flags &= ~CEPH_F_ATEND; + dfi->file_info.flags &= ~CEPH_F_ATEND; } retval = offset; } @@ -1352,7 +1355,7 @@ static void ceph_d_prune(struct dentry *dentry) static ssize_t ceph_read_dir(struct file *file, char __user *buf, size_t size, loff_t *ppos) { - struct ceph_file_info *fi = file->private_data; + struct ceph_dir_file_info *dfi = file->private_data; struct inode *inode = file_inode(file); struct ceph_inode_info *ci = ceph_inode(inode); int left; @@ -1361,12 +1364,12 @@ static ssize_t ceph_read_dir(struct file *file, char __user *buf, size_t size, if (!ceph_test_mount_opt(ceph_sb_to_client(inode->i_sb), DIRSTAT)) return -EISDIR; - if (!fi->dir_info) { - fi->dir_info = kmalloc(bufsize, GFP_KERNEL); - if (!fi->dir_info) + if (!dfi->dir_info) { + dfi->dir_info = kmalloc(bufsize, GFP_KERNEL); + if (!dfi->dir_info) return -ENOMEM; - fi->dir_info_len = - snprintf(fi->dir_info, bufsize, + dfi->dir_info_len = + snprintf(dfi->dir_info, bufsize, "entries: %20lld\n" " files: %20lld\n" " subdirs: %20lld\n" @@ -1386,10 +1389,10 @@ static ssize_t ceph_read_dir(struct file *file, char __user *buf, size_t size, (long)ci->i_rctime.tv_nsec); } - if (*ppos >= fi->dir_info_len) + if (*ppos >= dfi->dir_info_len) return 0; - size = min_t(unsigned, size, fi->dir_info_len-*ppos); - left = copy_to_user(buf, fi->dir_info + *ppos, size); + size = min_t(unsigned, size, dfi->dir_info_len-*ppos); + left = copy_to_user(buf, dfi->dir_info + *ppos, size); if (left == size) return -EFAULT; *ppos += (size - left); diff --git a/fs/ceph/file.c b/fs/ceph/file.c index a1f0aee29c27..4a92acba1e9c 100644 --- a/fs/ceph/file.c +++ b/fs/ceph/file.c @@ -161,13 +161,50 @@ out: return req; } +static int ceph_init_file_info(struct inode *inode, struct file *file, + int fmode, bool isdir) +{ + struct ceph_file_info *fi; + + dout("%s %p %p 0%o (%s)\n", __func__, inode, file, + inode->i_mode, isdir ? "dir" : "regular"); + BUG_ON(inode->i_fop->release != ceph_release); + + if (isdir) { + struct ceph_dir_file_info *dfi = + kmem_cache_zalloc(ceph_dir_file_cachep, GFP_KERNEL); + if (!dfi) { + ceph_put_fmode(ceph_inode(inode), fmode); /* clean up */ + return -ENOMEM; + } + + file->private_data = dfi; + fi = &dfi->file_info; + dfi->next_offset = 2; + dfi->readdir_cache_idx = -1; + } else { + fi = kmem_cache_zalloc(ceph_file_cachep, GFP_KERNEL); + if (!fi) { + ceph_put_fmode(ceph_inode(inode), fmode); /* clean up */ + return -ENOMEM; + } + + file->private_data = fi; + } + + fi->fmode = fmode; + spin_lock_init(&fi->rw_contexts_lock); + INIT_LIST_HEAD(&fi->rw_contexts); + + return 0; +} + /* * initialize private struct file data. * if we fail, clean up by dropping fmode reference on the ceph_inode */ static int ceph_init_file(struct inode *inode, struct file *file, int fmode) { - struct ceph_file_info *fi; int ret = 0; switch (inode->i_mode & S_IFMT) { @@ -175,22 +212,10 @@ static int ceph_init_file(struct inode *inode, struct file *file, int fmode) ceph_fscache_register_inode_cookie(inode); ceph_fscache_file_set_cookie(inode, file); case S_IFDIR: - dout("init_file %p %p 0%o (regular)\n", inode, file, - inode->i_mode); - fi = kmem_cache_zalloc(ceph_file_cachep, GFP_KERNEL); - if (!fi) { - ceph_put_fmode(ceph_inode(inode), fmode); /* clean up */ - return -ENOMEM; - } - fi->fmode = fmode; - - spin_lock_init(&fi->rw_contexts_lock); - INIT_LIST_HEAD(&fi->rw_contexts); - - fi->next_offset = 2; - fi->readdir_cache_idx = -1; - file->private_data = fi; - BUG_ON(inode->i_fop->release != ceph_release); + ret = ceph_init_file_info(inode, file, fmode, + S_ISDIR(inode->i_mode)); + if (ret) + return ret; break; case S_IFLNK: @@ -462,16 +487,27 @@ out_acl: int ceph_release(struct inode *inode, struct file *file) { struct ceph_inode_info *ci = ceph_inode(inode); - struct ceph_file_info *fi = file->private_data; - dout("release inode %p file %p\n", inode, file); - ceph_put_fmode(ci, fi->fmode); - if (fi->last_readdir) - ceph_mdsc_put_request(fi->last_readdir); - kfree(fi->last_name); - kfree(fi->dir_info); - WARN_ON(!list_empty(&fi->rw_contexts)); - kmem_cache_free(ceph_file_cachep, fi); + if (S_ISDIR(inode->i_mode)) { + struct ceph_dir_file_info *dfi = file->private_data; + dout("release inode %p dir file %p\n", inode, file); + WARN_ON(!list_empty(&dfi->file_info.rw_contexts)); + + ceph_put_fmode(ci, dfi->file_info.fmode); + + if (dfi->last_readdir) + ceph_mdsc_put_request(dfi->last_readdir); + kfree(dfi->last_name); + kfree(dfi->dir_info); + kmem_cache_free(ceph_dir_file_cachep, dfi); + } else { + struct ceph_file_info *fi = file->private_data; + dout("release inode %p regular file %p\n", inode, file); + WARN_ON(!list_empty(&fi->rw_contexts)); + + ceph_put_fmode(ci, fi->fmode); + kmem_cache_free(ceph_file_cachep, fi); + } /* wake up anyone waiting for caps on this inode */ wake_up_all(&ci->i_cap_wq); diff --git a/fs/ceph/super.c b/fs/ceph/super.c index 9bf9e54259dd..0fc03c456c50 100644 --- a/fs/ceph/super.c +++ b/fs/ceph/super.c @@ -679,6 +679,7 @@ struct kmem_cache *ceph_cap_cachep; struct kmem_cache *ceph_cap_flush_cachep; struct kmem_cache *ceph_dentry_cachep; struct kmem_cache *ceph_file_cachep; +struct kmem_cache *ceph_dir_file_cachep; static void ceph_inode_init_once(void *foo) { @@ -715,6 +716,10 @@ static int __init init_caches(void) if (!ceph_file_cachep) goto bad_file; + ceph_dir_file_cachep = KMEM_CACHE(ceph_dir_file_info, SLAB_MEM_SPREAD); + if (!ceph_dir_file_cachep) + goto bad_dir_file; + error = ceph_fscache_register(); if (error) goto bad_fscache; @@ -722,6 +727,8 @@ static int __init init_caches(void) return 0; bad_fscache: + kmem_cache_destroy(ceph_dir_file_cachep); +bad_dir_file: kmem_cache_destroy(ceph_file_cachep); bad_file: kmem_cache_destroy(ceph_dentry_cachep); @@ -747,6 +754,7 @@ static void destroy_caches(void) kmem_cache_destroy(ceph_cap_flush_cachep); kmem_cache_destroy(ceph_dentry_cachep); kmem_cache_destroy(ceph_file_cachep); + kmem_cache_destroy(ceph_dir_file_cachep); ceph_fscache_unregister(); } diff --git a/fs/ceph/super.h b/fs/ceph/super.h index 1c2086e0fec2..ff49433014e9 100644 --- a/fs/ceph/super.h +++ b/fs/ceph/super.h @@ -671,6 +671,10 @@ struct ceph_file_info { spinlock_t rw_contexts_lock; struct list_head rw_contexts; +}; + +struct ceph_dir_file_info { + struct ceph_file_info file_info; /* readdir: position within the dir */ u32 frag; diff --git a/include/linux/ceph/libceph.h b/include/linux/ceph/libceph.h index c2ec44cf5098..49c93b9308d7 100644 --- a/include/linux/ceph/libceph.h +++ b/include/linux/ceph/libceph.h @@ -262,6 +262,7 @@ extern struct kmem_cache *ceph_cap_cachep; extern struct kmem_cache *ceph_cap_flush_cachep; extern struct kmem_cache *ceph_dentry_cachep; extern struct kmem_cache *ceph_file_cachep; +extern struct kmem_cache *ceph_dir_file_cachep; /* ceph_common.c */ extern bool libceph_compatible(void *data); -- cgit v1.2.3-59-g8ed1b From 98cfda81040f4a6925a98567d036a918e855d4ec Mon Sep 17 00:00:00 2001 From: Chengguang Xu Date: Tue, 13 Mar 2018 10:43:45 +0800 Subject: ceph: return proper bool type to caller instead of pointer Change to return true/false only for bool type return code. Signed-off-by: Chengguang Xu Reviewed-by: "Yan, Zheng" Signed-off-by: Ilya Dryomov --- fs/ceph/mds_client.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) diff --git a/fs/ceph/mds_client.c b/fs/ceph/mds_client.c index a511a777ffb9..3a555b604441 100644 --- a/fs/ceph/mds_client.c +++ b/fs/ceph/mds_client.c @@ -419,9 +419,10 @@ struct ceph_mds_session *__ceph_lookup_mds_session(struct ceph_mds_client *mdsc, static bool __have_session(struct ceph_mds_client *mdsc, int mds) { - if (mds >= mdsc->max_sessions) + if (mds >= mdsc->max_sessions || !mdsc->sessions[mds]) return false; - return mdsc->sessions[mds]; + else + return true; } static int __verify_registered_session(struct ceph_mds_client *mdsc, -- cgit v1.2.3-59-g8ed1b From 50c55aeca27f09ceda0cd58b72b0addeecef74eb Mon Sep 17 00:00:00 2001 From: Chengguang Xu Date: Wed, 14 Mar 2018 13:47:33 +0800 Subject: ceph: fix invalid point dereference for error case in mdsc destroy 1. set fsc->mdsc after successfully allocate all necessary memory in mdsc init. 2. if fsc->mdsc is NULL, just skip destroy operation in mdsc destroy. Signed-off-by: Chengguang Xu Reviewed-by: "Yan, Zheng" Signed-off-by: Ilya Dryomov --- fs/ceph/mds_client.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/fs/ceph/mds_client.c b/fs/ceph/mds_client.c index 3a555b604441..b50044374947 100644 --- a/fs/ceph/mds_client.c +++ b/fs/ceph/mds_client.c @@ -3575,7 +3575,6 @@ int ceph_mdsc_init(struct ceph_fs_client *fsc) if (!mdsc) return -ENOMEM; mdsc->fsc = fsc; - fsc->mdsc = mdsc; mutex_init(&mdsc->mutex); mdsc->mdsmap = kzalloc(sizeof(*mdsc->mdsmap), GFP_NOFS); if (!mdsc->mdsmap) { @@ -3583,6 +3582,7 @@ int ceph_mdsc_init(struct ceph_fs_client *fsc) return -ENOMEM; } + fsc->mdsc = mdsc; init_completion(&mdsc->safe_umount_waiters); init_waitqueue_head(&mdsc->session_close_wq); INIT_LIST_HEAD(&mdsc->waiting_for_map); @@ -3861,6 +3861,9 @@ void ceph_mdsc_destroy(struct ceph_fs_client *fsc) struct ceph_mds_client *mdsc = fsc->mdsc; dout("mdsc_destroy %p\n", mdsc); + if (!mdsc) + return; + /* flush out any connection work with references to us */ ceph_msgr_flush(); -- cgit v1.2.3-59-g8ed1b From 7aac453a03a2216fcda4f4d72ae4d2089a013bb3 Mon Sep 17 00:00:00 2001 From: "Yan, Zheng" Date: Tue, 13 Mar 2018 19:52:20 +0800 Subject: ceph: rename function drop_leases() to a more descriptive name Signed-off-by: "Yan, Zheng" Signed-off-by: Ilya Dryomov --- fs/ceph/mds_client.c | 7 +++---- 1 file changed, 3 insertions(+), 4 deletions(-) diff --git a/fs/ceph/mds_client.c b/fs/ceph/mds_client.c index b50044374947..537048b4a4d5 100644 --- a/fs/ceph/mds_client.c +++ b/fs/ceph/mds_client.c @@ -3473,13 +3473,12 @@ void ceph_mdsc_lease_send_msg(struct ceph_mds_session *session, } /* - * drop all leases (and dentry refs) in preparation for umount + * lock unlock sessions, to wait ongoing session activities */ -static void drop_leases(struct ceph_mds_client *mdsc) +static void lock_unlock_sessions(struct ceph_mds_client *mdsc) { int i; - dout("drop_leases\n"); mutex_lock(&mdsc->mutex); for (i = 0; i < mdsc->max_sessions; i++) { struct ceph_mds_session *s = __ceph_lookup_mds_session(mdsc, i); @@ -3663,7 +3662,7 @@ void ceph_mdsc_pre_umount(struct ceph_mds_client *mdsc) dout("pre_umount\n"); mdsc->stopping = 1; - drop_leases(mdsc); + lock_unlock_sessions(mdsc); ceph_flush_dirty_caps(mdsc); wait_requests(mdsc); -- cgit v1.2.3-59-g8ed1b From f6870cc9a36623d1dcb0aceade9e8a4785a4283a Mon Sep 17 00:00:00 2001 From: Colin Ian King Date: Mon, 19 Mar 2018 13:33:10 +0000 Subject: rbd: fix spelling mistake: "reregisteration" -> "reregistration" Trivial fix to spelling mistake in rdb_warn message text. Signed-off-by: Colin Ian King Signed-off-by: Ilya Dryomov --- drivers/block/rbd.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/block/rbd.c b/drivers/block/rbd.c index a382fced33dd..aab513f1fb00 100644 --- a/drivers/block/rbd.c +++ b/drivers/block/rbd.c @@ -3479,7 +3479,7 @@ static void rbd_reregister_watch(struct work_struct *work) ret = rbd_dev_refresh(rbd_dev); if (ret) - rbd_warn(rbd_dev, "reregisteration refresh failed: %d", ret); + rbd_warn(rbd_dev, "reregistration refresh failed: %d", ret); } /* -- cgit v1.2.3-59-g8ed1b From 08a79102aa373e03ce704621fd84567605214465 Mon Sep 17 00:00:00 2001 From: Kyle Spiers Date: Sat, 17 Mar 2018 09:44:01 -0700 Subject: rbd: remove VLA usage As part of the effort to remove VLAs from the kernel[1], this moves the literal values into the stack array calculation instead of using a variable for the sizing. The resulting size can be found from sizeof(buf). [1] https://lkml.org/lkml/2018/3/7/621 Signed-off-by: Kyle Spiers Reviewed-by: Ilya Dryomov Signed-off-by: Ilya Dryomov --- drivers/block/rbd.c | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-) diff --git a/drivers/block/rbd.c b/drivers/block/rbd.c index aab513f1fb00..e60a638c2d32 100644 --- a/drivers/block/rbd.c +++ b/drivers/block/rbd.c @@ -2683,8 +2683,8 @@ static int __rbd_notify_op_lock(struct rbd_device *rbd_dev, { struct ceph_osd_client *osdc = &rbd_dev->rbd_client->client->osdc; struct rbd_client_id cid = rbd_get_cid(rbd_dev); - int buf_size = 4 + 8 + 8 + CEPH_ENCODING_START_BLK_LEN; - char buf[buf_size]; + char buf[4 + 8 + 8 + CEPH_ENCODING_START_BLK_LEN]; + int buf_size = sizeof(buf); void *p = buf; dout("%s rbd_dev %p notify_op %d\n", __func__, rbd_dev, notify_op); @@ -3202,8 +3202,8 @@ static void __rbd_acknowledge_notify(struct rbd_device *rbd_dev, u64 notify_id, u64 cookie, s32 *result) { struct ceph_osd_client *osdc = &rbd_dev->rbd_client->client->osdc; - int buf_size = 4 + CEPH_ENCODING_START_BLK_LEN; - char buf[buf_size]; + char buf[4 + CEPH_ENCODING_START_BLK_LEN]; + int buf_size = sizeof(buf); int ret; if (result) { -- cgit v1.2.3-59-g8ed1b From fb18a57568c2b84cd611e242c0f6fa97b45e4907 Mon Sep 17 00:00:00 2001 From: Luis Henriques Date: Fri, 5 Jan 2018 10:47:18 +0000 Subject: ceph: quota: add initial infrastructure to support cephfs quotas This patch adds the infrastructure required to support cephfs quotas as it is currently implemented in the ceph fuse client. Cephfs quotas can be set on any directory, and can restrict the number of bytes or the number of files stored beneath that point in the directory hierarchy. Quotas are set using the extended attributes 'ceph.quota.max_files' and 'ceph.quota.max_bytes', and can be removed by setting these attributes to '0'. Link: http://tracker.ceph.com/issues/22372 Signed-off-by: Luis Henriques Reviewed-by: "Yan, Zheng" Signed-off-by: Ilya Dryomov --- Documentation/filesystems/ceph.txt | 12 +++++++ fs/ceph/Makefile | 2 +- fs/ceph/inode.c | 6 ++++ fs/ceph/mds_client.c | 23 ++++++++++++++ fs/ceph/mds_client.h | 2 ++ fs/ceph/quota.c | 65 ++++++++++++++++++++++++++++++++++++++ fs/ceph/super.h | 8 +++++ fs/ceph/xattr.c | 44 ++++++++++++++++++++++++++ include/linux/ceph/ceph_features.h | 1 + include/linux/ceph/ceph_fs.h | 17 ++++++++++ net/ceph/ceph_common.c | 1 + 11 files changed, 180 insertions(+), 1 deletion(-) create mode 100644 fs/ceph/quota.c diff --git a/Documentation/filesystems/ceph.txt b/Documentation/filesystems/ceph.txt index 0b302a11718a..094772481263 100644 --- a/Documentation/filesystems/ceph.txt +++ b/Documentation/filesystems/ceph.txt @@ -62,6 +62,18 @@ subdirectories, and a summation of all nested file sizes. This makes the identification of large disk space consumers relatively quick, as no 'du' or similar recursive scan of the file system is required. +Finally, Ceph also allows quotas to be set on any directory in the system. +The quota can restrict the number of bytes or the number of files stored +beneath that point in the directory hierarchy. Quotas can be set using +extended attributes 'ceph.quota.max_files' and 'ceph.quota.max_bytes', eg: + + setfattr -n ceph.quota.max_bytes -v 100000000 /some/dir + getfattr -n ceph.quota.max_bytes /some/dir + +A limitation of the current quotas implementation is that it relies on the +cooperation of the client mounting the file system to stop writers when a +limit is reached. A modified or adversarial client cannot be prevented +from writing as much data as it needs. Mount Syntax ============ diff --git a/fs/ceph/Makefile b/fs/ceph/Makefile index 174f5709e508..a699e320393f 100644 --- a/fs/ceph/Makefile +++ b/fs/ceph/Makefile @@ -6,7 +6,7 @@ obj-$(CONFIG_CEPH_FS) += ceph.o ceph-y := super.o inode.o dir.o file.o locks.o addr.o ioctl.o \ - export.o caps.o snap.o xattr.o \ + export.o caps.o snap.o xattr.o quota.o \ mds_client.o mdsmap.o strings.o ceph_frag.o \ debugfs.o diff --git a/fs/ceph/inode.c b/fs/ceph/inode.c index be5f12d0d637..2c6f8be4ed63 100644 --- a/fs/ceph/inode.c +++ b/fs/ceph/inode.c @@ -441,6 +441,9 @@ struct inode *ceph_alloc_inode(struct super_block *sb) atomic64_set(&ci->i_complete_seq[1], 0); ci->i_symlink = NULL; + ci->i_max_bytes = 0; + ci->i_max_files = 0; + memset(&ci->i_dir_layout, 0, sizeof(ci->i_dir_layout)); RCU_INIT_POINTER(ci->i_layout.pool_ns, NULL); @@ -790,6 +793,9 @@ static int fill_inode(struct inode *inode, struct page *locked_page, inode->i_rdev = le32_to_cpu(info->rdev); inode->i_blkbits = fls(le32_to_cpu(info->layout.fl_stripe_unit)) - 1; + ci->i_max_bytes = iinfo->max_bytes; + ci->i_max_files = iinfo->max_files; + if ((new_version || (new_issued & CEPH_CAP_AUTH_SHARED)) && (issued & CEPH_CAP_AUTH_EXCL) == 0) { inode->i_mode = le32_to_cpu(info->mode); diff --git a/fs/ceph/mds_client.c b/fs/ceph/mds_client.c index 537048b4a4d5..1c9877c1149f 100644 --- a/fs/ceph/mds_client.c +++ b/fs/ceph/mds_client.c @@ -100,6 +100,26 @@ static int parse_reply_info_in(void **p, void *end, } else info->inline_version = CEPH_INLINE_NONE; + if (features & CEPH_FEATURE_MDS_QUOTA) { + u8 struct_v, struct_compat; + u32 struct_len; + + /* + * both struct_v and struct_compat are expected to be >= 1 + */ + ceph_decode_8_safe(p, end, struct_v, bad); + ceph_decode_8_safe(p, end, struct_compat, bad); + if (!struct_v || !struct_compat) + goto bad; + ceph_decode_32_safe(p, end, struct_len, bad); + ceph_decode_need(p, end, struct_len, bad); + ceph_decode_64_safe(p, end, info->max_bytes, bad); + ceph_decode_64_safe(p, end, info->max_files, bad); + } else { + info->max_bytes = 0; + info->max_files = 0; + } + info->pool_ns_len = 0; info->pool_ns_data = NULL; if (features & CEPH_FEATURE_FS_FILE_LAYOUT_V2) { @@ -4082,6 +4102,9 @@ static void dispatch(struct ceph_connection *con, struct ceph_msg *msg) case CEPH_MSG_CLIENT_LEASE: handle_lease(mdsc, s, msg); break; + case CEPH_MSG_CLIENT_QUOTA: + ceph_handle_quota(mdsc, s, msg); + break; default: pr_err("received unknown message type %d %s\n", type, diff --git a/fs/ceph/mds_client.h b/fs/ceph/mds_client.h index 71e3b783ee6f..2a67c8b01ae6 100644 --- a/fs/ceph/mds_client.h +++ b/fs/ceph/mds_client.h @@ -49,6 +49,8 @@ struct ceph_mds_reply_info_in { char *inline_data; u32 pool_ns_len; char *pool_ns_data; + u64 max_bytes; + u64 max_files; }; struct ceph_mds_reply_dir_entry { diff --git a/fs/ceph/quota.c b/fs/ceph/quota.c new file mode 100644 index 000000000000..1b69d8365ec2 --- /dev/null +++ b/fs/ceph/quota.c @@ -0,0 +1,65 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * quota.c - CephFS quota + * + * Copyright (C) 2017-2018 SUSE + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * as published by the Free Software Foundation; either version 2 + * of the License, or (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, see . + */ + +#include "super.h" +#include "mds_client.h" + +void ceph_handle_quota(struct ceph_mds_client *mdsc, + struct ceph_mds_session *session, + struct ceph_msg *msg) +{ + struct super_block *sb = mdsc->fsc->sb; + struct ceph_mds_quota *h = msg->front.iov_base; + struct ceph_vino vino; + struct inode *inode; + struct ceph_inode_info *ci; + + if (msg->front.iov_len != sizeof(*h)) { + pr_err("%s corrupt message mds%d len %d\n", __func__, + session->s_mds, (int)msg->front.iov_len); + ceph_msg_dump(msg); + return; + } + + /* increment msg sequence number */ + mutex_lock(&session->s_mutex); + session->s_seq++; + mutex_unlock(&session->s_mutex); + + /* lookup inode */ + vino.ino = le64_to_cpu(h->ino); + vino.snap = CEPH_NOSNAP; + inode = ceph_find_inode(sb, vino); + if (!inode) { + pr_warn("Failed to find inode %llu\n", vino.ino); + return; + } + ci = ceph_inode(inode); + + spin_lock(&ci->i_ceph_lock); + ci->i_rbytes = le64_to_cpu(h->rbytes); + ci->i_rfiles = le64_to_cpu(h->rfiles); + ci->i_rsubdirs = le64_to_cpu(h->rsubdirs); + ci->i_max_bytes = le64_to_cpu(h->max_bytes); + ci->i_max_files = le64_to_cpu(h->max_files); + spin_unlock(&ci->i_ceph_lock); + + iput(inode); +} diff --git a/fs/ceph/super.h b/fs/ceph/super.h index ff49433014e9..0c95a929bab7 100644 --- a/fs/ceph/super.h +++ b/fs/ceph/super.h @@ -310,6 +310,9 @@ struct ceph_inode_info { u64 i_rbytes, i_rfiles, i_rsubdirs; u64 i_files, i_subdirs; + /* quotas */ + u64 i_max_bytes, i_max_files; + struct rb_root i_fragtree; int i_fragtree_nsplits; struct mutex i_fragtree_mutex; @@ -1070,4 +1073,9 @@ extern int ceph_locks_to_pagelist(struct ceph_filelock *flocks, extern int ceph_fs_debugfs_init(struct ceph_fs_client *client); extern void ceph_fs_debugfs_cleanup(struct ceph_fs_client *client); +/* quota.c */ +extern void ceph_handle_quota(struct ceph_mds_client *mdsc, + struct ceph_mds_session *session, + struct ceph_msg *msg); + #endif /* _FS_CEPH_SUPER_H */ diff --git a/fs/ceph/xattr.c b/fs/ceph/xattr.c index e1c4e0b12b4c..7e72348639e4 100644 --- a/fs/ceph/xattr.c +++ b/fs/ceph/xattr.c @@ -224,6 +224,31 @@ static size_t ceph_vxattrcb_dir_rctime(struct ceph_inode_info *ci, char *val, (long)ci->i_rctime.tv_nsec); } +/* quotas */ + +static bool ceph_vxattrcb_quota_exists(struct ceph_inode_info *ci) +{ + return (ci->i_max_files || ci->i_max_bytes); +} + +static size_t ceph_vxattrcb_quota(struct ceph_inode_info *ci, char *val, + size_t size) +{ + return snprintf(val, size, "max_bytes=%llu max_files=%llu", + ci->i_max_bytes, ci->i_max_files); +} + +static size_t ceph_vxattrcb_quota_max_bytes(struct ceph_inode_info *ci, + char *val, size_t size) +{ + return snprintf(val, size, "%llu", ci->i_max_bytes); +} + +static size_t ceph_vxattrcb_quota_max_files(struct ceph_inode_info *ci, + char *val, size_t size) +{ + return snprintf(val, size, "%llu", ci->i_max_files); +} #define CEPH_XATTR_NAME(_type, _name) XATTR_CEPH_PREFIX #_type "." #_name #define CEPH_XATTR_NAME2(_type, _name, _name2) \ @@ -247,6 +272,15 @@ static size_t ceph_vxattrcb_dir_rctime(struct ceph_inode_info *ci, char *val, .hidden = true, \ .exists_cb = ceph_vxattrcb_layout_exists, \ } +#define XATTR_QUOTA_FIELD(_type, _name) \ + { \ + .name = CEPH_XATTR_NAME(_type, _name), \ + .name_size = sizeof(CEPH_XATTR_NAME(_type, _name)), \ + .getxattr_cb = ceph_vxattrcb_ ## _type ## _ ## _name, \ + .readonly = false, \ + .hidden = true, \ + .exists_cb = ceph_vxattrcb_quota_exists, \ + } static struct ceph_vxattr ceph_dir_vxattrs[] = { { @@ -270,6 +304,16 @@ static struct ceph_vxattr ceph_dir_vxattrs[] = { XATTR_NAME_CEPH(dir, rsubdirs), XATTR_NAME_CEPH(dir, rbytes), XATTR_NAME_CEPH(dir, rctime), + { + .name = "ceph.quota", + .name_size = sizeof("ceph.quota"), + .getxattr_cb = ceph_vxattrcb_quota, + .readonly = false, + .hidden = true, + .exists_cb = ceph_vxattrcb_quota_exists, + }, + XATTR_QUOTA_FIELD(quota, max_bytes), + XATTR_QUOTA_FIELD(quota, max_files), { .name = NULL, 0 } /* Required table terminator */ }; static size_t ceph_dir_vxattrs_name_size; /* total size of all names */ diff --git a/include/linux/ceph/ceph_features.h b/include/linux/ceph/ceph_features.h index 59042d5ac520..3901927cf6a0 100644 --- a/include/linux/ceph/ceph_features.h +++ b/include/linux/ceph/ceph_features.h @@ -204,6 +204,7 @@ DEFINE_CEPH_FEATURE_DEPRECATED(63, 1, RESERVED_BROKEN, LUMINOUS) // client-facin CEPH_FEATURE_OSD_PRIMARY_AFFINITY | \ CEPH_FEATURE_MSGR_KEEPALIVE2 | \ CEPH_FEATURE_OSD_POOLRESEND | \ + CEPH_FEATURE_MDS_QUOTA | \ CEPH_FEATURE_CRUSH_V4 | \ CEPH_FEATURE_NEW_OSDOP_ENCODING | \ CEPH_FEATURE_SERVER_JEWEL | \ diff --git a/include/linux/ceph/ceph_fs.h b/include/linux/ceph/ceph_fs.h index 88dd51381aaf..7ecfc88314d8 100644 --- a/include/linux/ceph/ceph_fs.h +++ b/include/linux/ceph/ceph_fs.h @@ -134,6 +134,7 @@ struct ceph_dir_layout { #define CEPH_MSG_CLIENT_LEASE 0x311 #define CEPH_MSG_CLIENT_SNAP 0x312 #define CEPH_MSG_CLIENT_CAPRELEASE 0x313 +#define CEPH_MSG_CLIENT_QUOTA 0x314 /* pool ops */ #define CEPH_MSG_POOLOP_REPLY 48 @@ -807,4 +808,20 @@ struct ceph_mds_snap_realm { } __attribute__ ((packed)); /* followed by my snap list, then prior parent snap list */ +/* + * quotas + */ +struct ceph_mds_quota { + __le64 ino; /* ino */ + struct ceph_timespec rctime; + __le64 rbytes; /* dir stats */ + __le64 rfiles; + __le64 rsubdirs; + __u8 struct_v; /* compat */ + __u8 struct_compat; + __le32 struct_len; + __le64 max_bytes; /* quota max. bytes */ + __le64 max_files; /* quota max. files */ +} __attribute__ ((packed)); + #endif diff --git a/net/ceph/ceph_common.c b/net/ceph/ceph_common.c index c15e2699090c..ffbcc7f5e740 100644 --- a/net/ceph/ceph_common.c +++ b/net/ceph/ceph_common.c @@ -80,6 +80,7 @@ const char *ceph_msg_type_name(int type) case CEPH_MSG_CLIENT_REPLY: return "client_reply"; case CEPH_MSG_CLIENT_CAPS: return "client_caps"; case CEPH_MSG_CLIENT_CAPRELEASE: return "client_cap_release"; + case CEPH_MSG_CLIENT_QUOTA: return "client_quota"; case CEPH_MSG_CLIENT_SNAP: return "client_snap"; case CEPH_MSG_CLIENT_LEASE: return "client_lease"; case CEPH_MSG_POOLOP_REPLY: return "poolop_reply"; -- cgit v1.2.3-59-g8ed1b From b7a2921765cf796280baf653a52b22b52e0ba266 Mon Sep 17 00:00:00 2001 From: Luis Henriques Date: Fri, 5 Jan 2018 10:47:19 +0000 Subject: ceph: quota: support for ceph.quota.max_files This patch adds support for the max_files quota. It hooks into all the ceph functions that add new filesystem objects that need to be checked against the quota limits. When these limits are hit, -EDQUOT is returned. Note that we're not checking quotas on ceph_link(). ceph_link doesn't really create a new inode, and since the MDS doesn't update the directory statistics when a new (hard) link is created (only with symlinks), they are not accounted as a new file. Signed-off-by: Luis Henriques Reviewed-by: "Yan, Zheng" Signed-off-by: Ilya Dryomov --- fs/ceph/dir.c | 11 ++++++++ fs/ceph/file.c | 4 ++- fs/ceph/quota.c | 80 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++ fs/ceph/super.h | 1 + 4 files changed, 95 insertions(+), 1 deletion(-) diff --git a/fs/ceph/dir.c b/fs/ceph/dir.c index 16405e0774a6..7d9851cd51bb 100644 --- a/fs/ceph/dir.c +++ b/fs/ceph/dir.c @@ -828,6 +828,9 @@ static int ceph_mknod(struct inode *dir, struct dentry *dentry, if (ceph_snap(dir) != CEPH_NOSNAP) return -EROFS; + if (ceph_quota_is_max_files_exceeded(dir)) + return -EDQUOT; + err = ceph_pre_init_acls(dir, &mode, &acls); if (err < 0) return err; @@ -881,6 +884,9 @@ static int ceph_symlink(struct inode *dir, struct dentry *dentry, if (ceph_snap(dir) != CEPH_NOSNAP) return -EROFS; + if (ceph_quota_is_max_files_exceeded(dir)) + return -EDQUOT; + dout("symlink in dir %p dentry %p to '%s'\n", dir, dentry, dest); req = ceph_mdsc_create_request(mdsc, CEPH_MDS_OP_SYMLINK, USE_AUTH_MDS); if (IS_ERR(req)) { @@ -930,6 +936,11 @@ static int ceph_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode) goto out; } + if (ceph_quota_is_max_files_exceeded(dir)) { + err = -EDQUOT; + goto out; + } + mode |= S_IFDIR; err = ceph_pre_init_acls(dir, &mode, &acls); if (err < 0) diff --git a/fs/ceph/file.c b/fs/ceph/file.c index 4a92acba1e9c..c3042330e0e9 100644 --- a/fs/ceph/file.c +++ b/fs/ceph/file.c @@ -402,7 +402,7 @@ int ceph_atomic_open(struct inode *dir, struct dentry *dentry, struct ceph_mds_request *req; struct dentry *dn; struct ceph_acls_info acls = {}; - int mask; + int mask; int err; dout("atomic_open %p dentry %p '%pd' %s flags %d mode 0%o\n", @@ -413,6 +413,8 @@ int ceph_atomic_open(struct inode *dir, struct dentry *dentry, return -ENAMETOOLONG; if (flags & O_CREAT) { + if (ceph_quota_is_max_files_exceeded(dir)) + return -EDQUOT; err = ceph_pre_init_acls(dir, &mode, &acls); if (err < 0) return err; diff --git a/fs/ceph/quota.c b/fs/ceph/quota.c index 1b69d8365ec2..cf1c78c4a4d2 100644 --- a/fs/ceph/quota.c +++ b/fs/ceph/quota.c @@ -63,3 +63,83 @@ void ceph_handle_quota(struct ceph_mds_client *mdsc, iput(inode); } + +enum quota_check_op { + QUOTA_CHECK_MAX_FILES_OP /* check quota max_files limit */ +}; + +/* + * check_quota_exceeded() will walk up the snaprealm hierarchy and, for each + * realm, it will execute quota check operation defined by the 'op' parameter. + * The snaprealm walk is interrupted if the quota check detects that the quota + * is exceeded or if the root inode is reached. + */ +static bool check_quota_exceeded(struct inode *inode, enum quota_check_op op, + loff_t delta) +{ + struct ceph_mds_client *mdsc = ceph_inode_to_client(inode)->mdsc; + struct ceph_inode_info *ci; + struct ceph_snap_realm *realm, *next; + struct ceph_vino vino; + struct inode *in; + u64 max, rvalue; + bool is_root; + bool exceeded = false; + + down_read(&mdsc->snap_rwsem); + realm = ceph_inode(inode)->i_snap_realm; + ceph_get_snap_realm(mdsc, realm); + while (realm) { + vino.ino = realm->ino; + vino.snap = CEPH_NOSNAP; + in = ceph_find_inode(inode->i_sb, vino); + if (!in) { + pr_warn("Failed to find inode for %llu\n", vino.ino); + break; + } + ci = ceph_inode(in); + spin_lock(&ci->i_ceph_lock); + if (op == QUOTA_CHECK_MAX_FILES_OP) { + max = ci->i_max_files; + rvalue = ci->i_rfiles + ci->i_rsubdirs; + } + is_root = (ci->i_vino.ino == CEPH_INO_ROOT); + spin_unlock(&ci->i_ceph_lock); + switch (op) { + case QUOTA_CHECK_MAX_FILES_OP: + exceeded = (max && (rvalue >= max)); + break; + default: + /* Shouldn't happen */ + pr_warn("Invalid quota check op (%d)\n", op); + exceeded = true; /* Just break the loop */ + } + iput(in); + + if (is_root || exceeded) + break; + next = realm->parent; + ceph_get_snap_realm(mdsc, next); + ceph_put_snap_realm(mdsc, realm); + realm = next; + } + ceph_put_snap_realm(mdsc, realm); + up_read(&mdsc->snap_rwsem); + + return exceeded; +} + +/* + * ceph_quota_is_max_files_exceeded - check if we can create a new file + * @inode: directory where a new file is being created + * + * This functions returns true is max_files quota allows a new file to be + * created. It is necessary to walk through the snaprealm hierarchy (until the + * FS root) to check all realms with quotas set. + */ +bool ceph_quota_is_max_files_exceeded(struct inode *inode) +{ + WARN_ON(!S_ISDIR(inode->i_mode)); + + return check_quota_exceeded(inode, QUOTA_CHECK_MAX_FILES_OP, 0); +} diff --git a/fs/ceph/super.h b/fs/ceph/super.h index 0c95a929bab7..4afc6cca8786 100644 --- a/fs/ceph/super.h +++ b/fs/ceph/super.h @@ -1077,5 +1077,6 @@ extern void ceph_fs_debugfs_cleanup(struct ceph_fs_client *client); extern void ceph_handle_quota(struct ceph_mds_client *mdsc, struct ceph_mds_session *session, struct ceph_msg *msg); +extern bool ceph_quota_is_max_files_exceeded(struct inode *inode); #endif /* _FS_CEPH_SUPER_H */ -- cgit v1.2.3-59-g8ed1b From cafe21a4fb3075fb2980caba8fdb533a1bdb52b0 Mon Sep 17 00:00:00 2001 From: Luis Henriques Date: Fri, 5 Jan 2018 10:47:20 +0000 Subject: ceph: quota: don't allow cross-quota renames This patch changes ceph_rename so that -EXDEV is returned if an attempt is made to mv a file between two different dir trees with different quotas setup. Signed-off-by: Luis Henriques Reviewed-by: "Yan, Zheng" Signed-off-by: Ilya Dryomov --- fs/ceph/dir.c | 5 +++++ fs/ceph/quota.c | 69 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++ fs/ceph/super.h | 1 + 3 files changed, 75 insertions(+) diff --git a/fs/ceph/dir.c b/fs/ceph/dir.c index 7d9851cd51bb..1f60498c4631 100644 --- a/fs/ceph/dir.c +++ b/fs/ceph/dir.c @@ -1080,6 +1080,11 @@ static int ceph_rename(struct inode *old_dir, struct dentry *old_dentry, else return -EROFS; } + /* don't allow cross-quota renames */ + if ((old_dir != new_dir) && + (!ceph_quota_is_same_realm(old_dir, new_dir))) + return -EXDEV; + dout("rename dir %p dentry %p to dir %p dentry %p\n", old_dir, old_dentry, new_dir, new_dentry); req = ceph_mdsc_create_request(mdsc, op, USE_AUTH_MDS); diff --git a/fs/ceph/quota.c b/fs/ceph/quota.c index cf1c78c4a4d2..5d7dada91a57 100644 --- a/fs/ceph/quota.c +++ b/fs/ceph/quota.c @@ -21,6 +21,11 @@ #include "super.h" #include "mds_client.h" +static inline bool ceph_has_quota(struct ceph_inode_info *ci) +{ + return (ci && (ci->i_max_files || ci->i_max_bytes)); +} + void ceph_handle_quota(struct ceph_mds_client *mdsc, struct ceph_mds_session *session, struct ceph_msg *msg) @@ -64,6 +69,70 @@ void ceph_handle_quota(struct ceph_mds_client *mdsc, iput(inode); } +/* + * This function walks through the snaprealm for an inode and returns the + * ceph_snap_realm for the first snaprealm that has quotas set (either max_files + * or max_bytes). If the root is reached, return the root ceph_snap_realm + * instead. + * + * Note that the caller is responsible for calling ceph_put_snap_realm() on the + * returned realm. + */ +static struct ceph_snap_realm *get_quota_realm(struct ceph_mds_client *mdsc, + struct inode *inode) +{ + struct ceph_inode_info *ci = NULL; + struct ceph_snap_realm *realm, *next; + struct ceph_vino vino; + struct inode *in; + + realm = ceph_inode(inode)->i_snap_realm; + ceph_get_snap_realm(mdsc, realm); + while (realm) { + vino.ino = realm->ino; + vino.snap = CEPH_NOSNAP; + in = ceph_find_inode(inode->i_sb, vino); + if (!in) { + pr_warn("Failed to find inode for %llu\n", vino.ino); + break; + } + ci = ceph_inode(in); + if (ceph_has_quota(ci) || (ci->i_vino.ino == CEPH_INO_ROOT)) { + iput(in); + return realm; + } + iput(in); + next = realm->parent; + ceph_get_snap_realm(mdsc, next); + ceph_put_snap_realm(mdsc, realm); + realm = next; + } + if (realm) + ceph_put_snap_realm(mdsc, realm); + + return NULL; +} + +bool ceph_quota_is_same_realm(struct inode *old, struct inode *new) +{ + struct ceph_mds_client *mdsc = ceph_inode_to_client(old)->mdsc; + struct ceph_snap_realm *old_realm, *new_realm; + bool is_same; + + down_read(&mdsc->snap_rwsem); + old_realm = get_quota_realm(mdsc, old); + new_realm = get_quota_realm(mdsc, new); + is_same = (old_realm == new_realm); + up_read(&mdsc->snap_rwsem); + + if (old_realm) + ceph_put_snap_realm(mdsc, old_realm); + if (new_realm) + ceph_put_snap_realm(mdsc, new_realm); + + return is_same; +} + enum quota_check_op { QUOTA_CHECK_MAX_FILES_OP /* check quota max_files limit */ }; diff --git a/fs/ceph/super.h b/fs/ceph/super.h index 4afc6cca8786..eea6f70f3bf9 100644 --- a/fs/ceph/super.h +++ b/fs/ceph/super.h @@ -1078,5 +1078,6 @@ extern void ceph_handle_quota(struct ceph_mds_client *mdsc, struct ceph_mds_session *session, struct ceph_msg *msg); extern bool ceph_quota_is_max_files_exceeded(struct inode *inode); +extern bool ceph_quota_is_same_realm(struct inode *old, struct inode *new); #endif /* _FS_CEPH_SUPER_H */ -- cgit v1.2.3-59-g8ed1b From 2b83845f8bd711e66e1c367a9bd56c9df3410236 Mon Sep 17 00:00:00 2001 From: Luis Henriques Date: Fri, 5 Jan 2018 10:47:21 +0000 Subject: ceph: quota: support for ceph.quota.max_bytes Signed-off-by: Luis Henriques Reviewed-by: "Yan, Zheng" Signed-off-by: Ilya Dryomov --- fs/ceph/file.c | 11 +++++++++++ fs/ceph/inode.c | 4 ++++ fs/ceph/quota.c | 28 +++++++++++++++++++++++++++- fs/ceph/super.h | 2 ++ 4 files changed, 44 insertions(+), 1 deletion(-) diff --git a/fs/ceph/file.c b/fs/ceph/file.c index c3042330e0e9..0a2843fdebbd 100644 --- a/fs/ceph/file.c +++ b/fs/ceph/file.c @@ -1378,6 +1378,11 @@ retry_snap: pos = iocb->ki_pos; count = iov_iter_count(from); + if (ceph_quota_is_max_bytes_exceeded(inode, pos + count)) { + err = -EDQUOT; + goto out; + } + err = file_remove_privs(file); if (err) goto out; @@ -1708,6 +1713,12 @@ static long ceph_fallocate(struct file *file, int mode, goto unlock; } + if (!(mode & (FALLOC_FL_PUNCH_HOLE | FALLOC_FL_KEEP_SIZE)) && + ceph_quota_is_max_bytes_exceeded(inode, offset + length)) { + ret = -EDQUOT; + goto unlock; + } + if (ceph_osdmap_flag(osdc, CEPH_OSDMAP_FULL) && !(mode & FALLOC_FL_PUNCH_HOLE)) { ret = -ENOSPC; diff --git a/fs/ceph/inode.c b/fs/ceph/inode.c index 2c6f8be4ed63..50ccae151ea0 100644 --- a/fs/ceph/inode.c +++ b/fs/ceph/inode.c @@ -2147,6 +2147,10 @@ int ceph_setattr(struct dentry *dentry, struct iattr *attr) if (err != 0) return err; + if ((attr->ia_valid & ATTR_SIZE) && + ceph_quota_is_max_bytes_exceeded(inode, attr->ia_size)) + return -EDQUOT; + err = __ceph_setattr(inode, attr); if (err >= 0 && (attr->ia_valid & ATTR_MODE)) diff --git a/fs/ceph/quota.c b/fs/ceph/quota.c index 5d7dada91a57..745f9f47027b 100644 --- a/fs/ceph/quota.c +++ b/fs/ceph/quota.c @@ -134,7 +134,8 @@ bool ceph_quota_is_same_realm(struct inode *old, struct inode *new) } enum quota_check_op { - QUOTA_CHECK_MAX_FILES_OP /* check quota max_files limit */ + QUOTA_CHECK_MAX_FILES_OP, /* check quota max_files limit */ + QUOTA_CHECK_MAX_BYTES_OP /* check quota max_files limit */ }; /* @@ -171,6 +172,9 @@ static bool check_quota_exceeded(struct inode *inode, enum quota_check_op op, if (op == QUOTA_CHECK_MAX_FILES_OP) { max = ci->i_max_files; rvalue = ci->i_rfiles + ci->i_rsubdirs; + } else { + max = ci->i_max_bytes; + rvalue = ci->i_rbytes; } is_root = (ci->i_vino.ino == CEPH_INO_ROOT); spin_unlock(&ci->i_ceph_lock); @@ -178,6 +182,9 @@ static bool check_quota_exceeded(struct inode *inode, enum quota_check_op op, case QUOTA_CHECK_MAX_FILES_OP: exceeded = (max && (rvalue >= max)); break; + case QUOTA_CHECK_MAX_BYTES_OP: + exceeded = (max && (rvalue + delta > max)); + break; default: /* Shouldn't happen */ pr_warn("Invalid quota check op (%d)\n", op); @@ -212,3 +219,22 @@ bool ceph_quota_is_max_files_exceeded(struct inode *inode) return check_quota_exceeded(inode, QUOTA_CHECK_MAX_FILES_OP, 0); } + +/* + * ceph_quota_is_max_bytes_exceeded - check if we can write to a file + * @inode: inode being written + * @newsize: new size if write succeeds + * + * This functions returns true is max_bytes quota allows a file size to reach + * @newsize; it returns false otherwise. + */ +bool ceph_quota_is_max_bytes_exceeded(struct inode *inode, loff_t newsize) +{ + loff_t size = i_size_read(inode); + + /* return immediately if we're decreasing file size */ + if (newsize <= size) + return false; + + return check_quota_exceeded(inode, QUOTA_CHECK_MAX_BYTES_OP, (newsize - size)); +} diff --git a/fs/ceph/super.h b/fs/ceph/super.h index eea6f70f3bf9..5870c225c2fc 100644 --- a/fs/ceph/super.h +++ b/fs/ceph/super.h @@ -1079,5 +1079,7 @@ extern void ceph_handle_quota(struct ceph_mds_client *mdsc, struct ceph_msg *msg); extern bool ceph_quota_is_max_files_exceeded(struct inode *inode); extern bool ceph_quota_is_same_realm(struct inode *old, struct inode *new); +extern bool ceph_quota_is_max_bytes_exceeded(struct inode *inode, + loff_t newlen); #endif /* _FS_CEPH_SUPER_H */ -- cgit v1.2.3-59-g8ed1b From 1ab302a0cb1455631646aa66b7fc02afd617ea4f Mon Sep 17 00:00:00 2001 From: Luis Henriques Date: Fri, 5 Jan 2018 10:47:22 +0000 Subject: ceph: quota: update MDS when max_bytes is approaching When we're reaching the ceph.quota.max_bytes limit, i.e., when writing more than 1/16th of the space left in a quota realm, update the MDS with the new file size. This mirrors the fuse-client approach with commit 122c50315ed1 ("client: Inform mds file size when approaching quota limit"), in the ceph git tree. Signed-off-by: Luis Henriques Reviewed-by: "Yan, Zheng" Signed-off-by: Ilya Dryomov --- fs/ceph/file.c | 6 ++++++ fs/ceph/quota.c | 38 +++++++++++++++++++++++++++++++++++++- fs/ceph/super.h | 2 ++ 3 files changed, 45 insertions(+), 1 deletion(-) diff --git a/fs/ceph/file.c b/fs/ceph/file.c index 0a2843fdebbd..f85040d73e3d 100644 --- a/fs/ceph/file.c +++ b/fs/ceph/file.c @@ -1464,6 +1464,7 @@ retry_snap: if (written >= 0) { int dirty; + spin_lock(&ci->i_ceph_lock); ci->i_inline_version = CEPH_INLINE_NONE; dirty = __ceph_mark_dirty_caps(ci, CEPH_CAP_FILE_WR, @@ -1471,6 +1472,8 @@ retry_snap: spin_unlock(&ci->i_ceph_lock); if (dirty) __mark_inode_dirty(inode, dirty); + if (ceph_quota_is_max_bytes_approaching(inode, iocb->ki_pos)) + ceph_check_caps(ci, CHECK_CAPS_NODELAY, NULL); } dout("aio_write %p %llx.%llx %llu~%u dropping cap refs on %s\n", @@ -1767,6 +1770,9 @@ static long ceph_fallocate(struct file *file, int mode, spin_unlock(&ci->i_ceph_lock); if (dirty) __mark_inode_dirty(inode, dirty); + if ((endoff > size) && + ceph_quota_is_max_bytes_approaching(inode, endoff)) + ceph_check_caps(ci, CHECK_CAPS_NODELAY, NULL); } ceph_put_cap_refs(ci, got); diff --git a/fs/ceph/quota.c b/fs/ceph/quota.c index 745f9f47027b..7d1e18e2249f 100644 --- a/fs/ceph/quota.c +++ b/fs/ceph/quota.c @@ -135,7 +135,9 @@ bool ceph_quota_is_same_realm(struct inode *old, struct inode *new) enum quota_check_op { QUOTA_CHECK_MAX_FILES_OP, /* check quota max_files limit */ - QUOTA_CHECK_MAX_BYTES_OP /* check quota max_files limit */ + QUOTA_CHECK_MAX_BYTES_OP, /* check quota max_files limit */ + QUOTA_CHECK_MAX_BYTES_APPROACHING_OP /* check if quota max_files + limit is approaching */ }; /* @@ -185,6 +187,20 @@ static bool check_quota_exceeded(struct inode *inode, enum quota_check_op op, case QUOTA_CHECK_MAX_BYTES_OP: exceeded = (max && (rvalue + delta > max)); break; + case QUOTA_CHECK_MAX_BYTES_APPROACHING_OP: + if (max) { + if (rvalue >= max) + exceeded = true; + else { + /* + * when we're writing more that 1/16th + * of the available space + */ + exceeded = + (((max - rvalue) >> 4) < delta); + } + } + break; default: /* Shouldn't happen */ pr_warn("Invalid quota check op (%d)\n", op); @@ -238,3 +254,23 @@ bool ceph_quota_is_max_bytes_exceeded(struct inode *inode, loff_t newsize) return check_quota_exceeded(inode, QUOTA_CHECK_MAX_BYTES_OP, (newsize - size)); } + +/* + * ceph_quota_is_max_bytes_approaching - check if we're reaching max_bytes + * @inode: inode being written + * @newsize: new size if write succeeds + * + * This function returns true if the new file size @newsize will be consuming + * more than 1/16th of the available quota space; it returns false otherwise. + */ +bool ceph_quota_is_max_bytes_approaching(struct inode *inode, loff_t newsize) +{ + loff_t size = ceph_inode(inode)->i_reported_size; + + /* return immediately if we're decreasing file size */ + if (newsize <= size) + return false; + + return check_quota_exceeded(inode, QUOTA_CHECK_MAX_BYTES_APPROACHING_OP, + (newsize - size)); +} diff --git a/fs/ceph/super.h b/fs/ceph/super.h index 5870c225c2fc..e4ff485d24c7 100644 --- a/fs/ceph/super.h +++ b/fs/ceph/super.h @@ -1081,5 +1081,7 @@ extern bool ceph_quota_is_max_files_exceeded(struct inode *inode); extern bool ceph_quota_is_same_realm(struct inode *old, struct inode *new); extern bool ceph_quota_is_max_bytes_exceeded(struct inode *inode, loff_t newlen); +extern bool ceph_quota_is_max_bytes_approaching(struct inode *inode, + loff_t newlen); #endif /* _FS_CEPH_SUPER_H */ -- cgit v1.2.3-59-g8ed1b From 2596366907f872de7be0557720bb55bccf7489d9 Mon Sep 17 00:00:00 2001 From: "Yan, Zheng" Date: Fri, 12 Jan 2018 16:26:17 +0800 Subject: ceph: don't check quota for snap inode snap inode's i_snap_realm is not pointing to ceph_snap_realm. Signed-off-by: "Yan, Zheng" Signed-off-by: Ilya Dryomov --- fs/ceph/dir.c | 3 ++- fs/ceph/quota.c | 18 ++++++++++++++++-- 2 files changed, 18 insertions(+), 3 deletions(-) diff --git a/fs/ceph/dir.c b/fs/ceph/dir.c index 1f60498c4631..6cd92a0e2af9 100644 --- a/fs/ceph/dir.c +++ b/fs/ceph/dir.c @@ -936,7 +936,8 @@ static int ceph_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode) goto out; } - if (ceph_quota_is_max_files_exceeded(dir)) { + if (op == CEPH_MDS_OP_MKDIR && + ceph_quota_is_max_files_exceeded(dir)) { err = -EDQUOT; goto out; } diff --git a/fs/ceph/quota.c b/fs/ceph/quota.c index 7d1e18e2249f..529de67393a9 100644 --- a/fs/ceph/quota.c +++ b/fs/ceph/quota.c @@ -86,8 +86,15 @@ static struct ceph_snap_realm *get_quota_realm(struct ceph_mds_client *mdsc, struct ceph_vino vino; struct inode *in; + if (ceph_snap(inode) != CEPH_NOSNAP) + return NULL; + realm = ceph_inode(inode)->i_snap_realm; - ceph_get_snap_realm(mdsc, realm); + if (realm) + ceph_get_snap_realm(mdsc, realm); + else + pr_err_ratelimited("get_quota_realm: ino (%llx.%llx) " + "null i_snap_realm\n", ceph_vinop(inode)); while (realm) { vino.ino = realm->ino; vino.snap = CEPH_NOSNAP; @@ -158,9 +165,16 @@ static bool check_quota_exceeded(struct inode *inode, enum quota_check_op op, bool is_root; bool exceeded = false; + if (ceph_snap(inode) != CEPH_NOSNAP) + return false; + down_read(&mdsc->snap_rwsem); realm = ceph_inode(inode)->i_snap_realm; - ceph_get_snap_realm(mdsc, realm); + if (realm) + ceph_get_snap_realm(mdsc, realm); + else + pr_err_ratelimited("check_quota_exceeded: ino (%llx.%llx) " + "null i_snap_realm\n", ceph_vinop(inode)); while (realm) { vino.ino = realm->ino; vino.snap = CEPH_NOSNAP; -- cgit v1.2.3-59-g8ed1b From 0eb6bbe4d9cf02f639d661edf7c02defc3453a69 Mon Sep 17 00:00:00 2001 From: "Yan, Zheng" Date: Fri, 12 Jan 2018 16:55:31 +0800 Subject: ceph: fix root quota realm check Signed-off-by: "Yan, Zheng" Signed-off-by: Ilya Dryomov --- fs/ceph/quota.c | 16 ++++++++-------- 1 file changed, 8 insertions(+), 8 deletions(-) diff --git a/fs/ceph/quota.c b/fs/ceph/quota.c index 529de67393a9..121819baeb58 100644 --- a/fs/ceph/quota.c +++ b/fs/ceph/quota.c @@ -85,6 +85,7 @@ static struct ceph_snap_realm *get_quota_realm(struct ceph_mds_client *mdsc, struct ceph_snap_realm *realm, *next; struct ceph_vino vino; struct inode *in; + bool has_quota; if (ceph_snap(inode) != CEPH_NOSNAP) return NULL; @@ -104,12 +105,13 @@ static struct ceph_snap_realm *get_quota_realm(struct ceph_mds_client *mdsc, break; } ci = ceph_inode(in); - if (ceph_has_quota(ci) || (ci->i_vino.ino == CEPH_INO_ROOT)) { - iput(in); - return realm; - } + has_quota = ceph_has_quota(ci); iput(in); + next = realm->parent; + if (has_quota || !next) + return realm; + ceph_get_snap_realm(mdsc, next); ceph_put_snap_realm(mdsc, realm); realm = next; @@ -162,7 +164,6 @@ static bool check_quota_exceeded(struct inode *inode, enum quota_check_op op, struct ceph_vino vino; struct inode *in; u64 max, rvalue; - bool is_root; bool exceeded = false; if (ceph_snap(inode) != CEPH_NOSNAP) @@ -192,7 +193,6 @@ static bool check_quota_exceeded(struct inode *inode, enum quota_check_op op, max = ci->i_max_bytes; rvalue = ci->i_rbytes; } - is_root = (ci->i_vino.ino == CEPH_INO_ROOT); spin_unlock(&ci->i_ceph_lock); switch (op) { case QUOTA_CHECK_MAX_FILES_OP: @@ -222,9 +222,9 @@ static bool check_quota_exceeded(struct inode *inode, enum quota_check_op op, } iput(in); - if (is_root || exceeded) - break; next = realm->parent; + if (exceeded || !next) + break; ceph_get_snap_realm(mdsc, next); ceph_put_snap_realm(mdsc, realm); realm = next; -- cgit v1.2.3-59-g8ed1b From e3161f17d92699ce6ca3b7988131b10ad4035cf9 Mon Sep 17 00:00:00 2001 From: Luis Henriques Date: Fri, 12 Jan 2018 17:19:28 +0000 Subject: ceph: quota: cache inode pointer in ceph_snap_realm Keep a pointer to the inode in struct ceph_snap_realm. This allows to optimize functions that walk the realms hierarchy (e.g. in quotas). Signed-off-by: Luis Henriques Reviewed-by: "Yan, Zheng" Signed-off-by: Ilya Dryomov --- fs/ceph/caps.c | 4 +++- fs/ceph/inode.c | 3 +++ fs/ceph/quota.c | 24 ++++++++++-------------- fs/ceph/snap.c | 2 ++ fs/ceph/super.h | 1 + 5 files changed, 19 insertions(+), 15 deletions(-) diff --git a/fs/ceph/caps.c b/fs/ceph/caps.c index 25141b6683e9..23dbfae16156 100644 --- a/fs/ceph/caps.c +++ b/fs/ceph/caps.c @@ -703,9 +703,11 @@ void ceph_add_cap(struct inode *inode, } spin_lock(&realm->inodes_with_caps_lock); - ci->i_snap_realm = realm; list_add(&ci->i_snap_realm_item, &realm->inodes_with_caps); + ci->i_snap_realm = realm; + if (realm->ino == ci->i_vino.ino) + realm->inode = inode; spin_unlock(&realm->inodes_with_caps_lock); if (oldrealm) diff --git a/fs/ceph/inode.c b/fs/ceph/inode.c index 50ccae151ea0..8ea11b1a2e23 100644 --- a/fs/ceph/inode.c +++ b/fs/ceph/inode.c @@ -551,6 +551,9 @@ void ceph_destroy_inode(struct inode *inode) dout(" dropping residual ref to snap realm %p\n", realm); spin_lock(&realm->inodes_with_caps_lock); list_del_init(&ci->i_snap_realm_item); + ci->i_snap_realm = NULL; + if (realm->ino == ci->i_vino.ino) + realm->inode = NULL; spin_unlock(&realm->inodes_with_caps_lock); ceph_put_snap_realm(mdsc, realm); } diff --git a/fs/ceph/quota.c b/fs/ceph/quota.c index 121819baeb58..c561a85ea8b1 100644 --- a/fs/ceph/quota.c +++ b/fs/ceph/quota.c @@ -83,7 +83,6 @@ static struct ceph_snap_realm *get_quota_realm(struct ceph_mds_client *mdsc, { struct ceph_inode_info *ci = NULL; struct ceph_snap_realm *realm, *next; - struct ceph_vino vino; struct inode *in; bool has_quota; @@ -97,13 +96,12 @@ static struct ceph_snap_realm *get_quota_realm(struct ceph_mds_client *mdsc, pr_err_ratelimited("get_quota_realm: ino (%llx.%llx) " "null i_snap_realm\n", ceph_vinop(inode)); while (realm) { - vino.ino = realm->ino; - vino.snap = CEPH_NOSNAP; - in = ceph_find_inode(inode->i_sb, vino); - if (!in) { - pr_warn("Failed to find inode for %llu\n", vino.ino); + spin_lock(&realm->inodes_with_caps_lock); + in = realm->inode ? igrab(realm->inode) : NULL; + spin_unlock(&realm->inodes_with_caps_lock); + if (!in) break; - } + ci = ceph_inode(in); has_quota = ceph_has_quota(ci); iput(in); @@ -161,7 +159,6 @@ static bool check_quota_exceeded(struct inode *inode, enum quota_check_op op, struct ceph_mds_client *mdsc = ceph_inode_to_client(inode)->mdsc; struct ceph_inode_info *ci; struct ceph_snap_realm *realm, *next; - struct ceph_vino vino; struct inode *in; u64 max, rvalue; bool exceeded = false; @@ -177,13 +174,12 @@ static bool check_quota_exceeded(struct inode *inode, enum quota_check_op op, pr_err_ratelimited("check_quota_exceeded: ino (%llx.%llx) " "null i_snap_realm\n", ceph_vinop(inode)); while (realm) { - vino.ino = realm->ino; - vino.snap = CEPH_NOSNAP; - in = ceph_find_inode(inode->i_sb, vino); - if (!in) { - pr_warn("Failed to find inode for %llu\n", vino.ino); + spin_lock(&realm->inodes_with_caps_lock); + in = realm->inode ? igrab(realm->inode) : NULL; + spin_unlock(&realm->inodes_with_caps_lock); + if (!in) break; - } + ci = ceph_inode(in); spin_lock(&ci->i_ceph_lock); if (op == QUOTA_CHECK_MAX_FILES_OP) { diff --git a/fs/ceph/snap.c b/fs/ceph/snap.c index 07cf95e6413d..041c27ea8de1 100644 --- a/fs/ceph/snap.c +++ b/fs/ceph/snap.c @@ -931,6 +931,8 @@ void ceph_handle_snap(struct ceph_mds_client *mdsc, list_add(&ci->i_snap_realm_item, &realm->inodes_with_caps); ci->i_snap_realm = realm; + if (realm->ino == ci->i_vino.ino) + realm->inode = inode; spin_unlock(&realm->inodes_with_caps_lock); spin_unlock(&ci->i_ceph_lock); diff --git a/fs/ceph/super.h b/fs/ceph/super.h index e4ff485d24c7..8217abf46182 100644 --- a/fs/ceph/super.h +++ b/fs/ceph/super.h @@ -755,6 +755,7 @@ struct ceph_readdir_cache_control { */ struct ceph_snap_realm { u64 ino; + struct inode *inode; atomic_t nref; struct rb_node node; -- cgit v1.2.3-59-g8ed1b From d557c48db730eaab6b75d4af332c135309b7a6a4 Mon Sep 17 00:00:00 2001 From: Luis Henriques Date: Fri, 12 Jan 2018 17:19:29 +0000 Subject: ceph: quota: add counter for snaprealms with quota By keeping a counter with the number of snaprealms that have quota set allows to optimize the functions that need to walk throught the realms hierarchy looking for quotas. Thus, if this counter is zero it's safe to assume that there are no realms with quota. Signed-off-by: Luis Henriques Reviewed-by: "Yan, Zheng" Signed-off-by: Ilya Dryomov --- fs/ceph/inode.c | 6 ++++-- fs/ceph/mds_client.c | 1 + fs/ceph/mds_client.h | 2 ++ fs/ceph/quota.c | 29 ++++++++++++++++++++++++----- fs/ceph/super.h | 20 ++++++++++++++++++++ 5 files changed, 51 insertions(+), 7 deletions(-) diff --git a/fs/ceph/inode.c b/fs/ceph/inode.c index 8ea11b1a2e23..8bf60250309e 100644 --- a/fs/ceph/inode.c +++ b/fs/ceph/inode.c @@ -539,6 +539,9 @@ void ceph_destroy_inode(struct inode *inode) ceph_queue_caps_release(inode); + if (__ceph_has_any_quota(ci)) + ceph_adjust_quota_realms_count(inode, false); + /* * we may still have a snap_realm reference if there are stray * caps in i_snap_caps. @@ -796,8 +799,7 @@ static int fill_inode(struct inode *inode, struct page *locked_page, inode->i_rdev = le32_to_cpu(info->rdev); inode->i_blkbits = fls(le32_to_cpu(info->layout.fl_stripe_unit)) - 1; - ci->i_max_bytes = iinfo->max_bytes; - ci->i_max_files = iinfo->max_files; + __ceph_update_quota(ci, iinfo->max_bytes, iinfo->max_files); if ((new_version || (new_issued & CEPH_CAP_AUTH_SHARED)) && (issued & CEPH_CAP_AUTH_EXCL) == 0) { diff --git a/fs/ceph/mds_client.c b/fs/ceph/mds_client.c index 1c9877c1149f..5ece2e6ad154 100644 --- a/fs/ceph/mds_client.c +++ b/fs/ceph/mds_client.c @@ -3609,6 +3609,7 @@ int ceph_mdsc_init(struct ceph_fs_client *fsc) atomic_set(&mdsc->num_sessions, 0); mdsc->max_sessions = 0; mdsc->stopping = 0; + atomic64_set(&mdsc->quotarealms_count, 0); mdsc->last_snap_seq = 0; init_rwsem(&mdsc->snap_rwsem); mdsc->snap_realms = RB_ROOT; diff --git a/fs/ceph/mds_client.h b/fs/ceph/mds_client.h index 2a67c8b01ae6..2ec3b5b35067 100644 --- a/fs/ceph/mds_client.h +++ b/fs/ceph/mds_client.h @@ -314,6 +314,8 @@ struct ceph_mds_client { int max_sessions; /* len of s_mds_sessions */ int stopping; /* true if shutting down */ + atomic64_t quotarealms_count; /* # realms with quota */ + /* * snap_rwsem will cover cap linkage into snaprealms, and * realm snap contexts. (later, we can do per-realm snap diff --git a/fs/ceph/quota.c b/fs/ceph/quota.c index c561a85ea8b1..588744b4665f 100644 --- a/fs/ceph/quota.c +++ b/fs/ceph/quota.c @@ -21,9 +21,19 @@ #include "super.h" #include "mds_client.h" -static inline bool ceph_has_quota(struct ceph_inode_info *ci) +void ceph_adjust_quota_realms_count(struct inode *inode, bool inc) { - return (ci && (ci->i_max_files || ci->i_max_bytes)); + struct ceph_mds_client *mdsc = ceph_inode_to_client(inode)->mdsc; + if (inc) + atomic64_inc(&mdsc->quotarealms_count); + else + atomic64_dec(&mdsc->quotarealms_count); +} + +static inline bool ceph_has_realms_with_quotas(struct inode *inode) +{ + struct ceph_mds_client *mdsc = ceph_inode_to_client(inode)->mdsc; + return atomic64_read(&mdsc->quotarealms_count) > 0; } void ceph_handle_quota(struct ceph_mds_client *mdsc, @@ -62,8 +72,8 @@ void ceph_handle_quota(struct ceph_mds_client *mdsc, ci->i_rbytes = le64_to_cpu(h->rbytes); ci->i_rfiles = le64_to_cpu(h->rfiles); ci->i_rsubdirs = le64_to_cpu(h->rsubdirs); - ci->i_max_bytes = le64_to_cpu(h->max_bytes); - ci->i_max_files = le64_to_cpu(h->max_files); + __ceph_update_quota(ci, le64_to_cpu(h->max_bytes), + le64_to_cpu(h->max_files)); spin_unlock(&ci->i_ceph_lock); iput(inode); @@ -103,7 +113,7 @@ static struct ceph_snap_realm *get_quota_realm(struct ceph_mds_client *mdsc, break; ci = ceph_inode(in); - has_quota = ceph_has_quota(ci); + has_quota = __ceph_has_any_quota(ci); iput(in); next = realm->parent; @@ -241,6 +251,9 @@ static bool check_quota_exceeded(struct inode *inode, enum quota_check_op op, */ bool ceph_quota_is_max_files_exceeded(struct inode *inode) { + if (!ceph_has_realms_with_quotas(inode)) + return false; + WARN_ON(!S_ISDIR(inode->i_mode)); return check_quota_exceeded(inode, QUOTA_CHECK_MAX_FILES_OP, 0); @@ -258,6 +271,9 @@ bool ceph_quota_is_max_bytes_exceeded(struct inode *inode, loff_t newsize) { loff_t size = i_size_read(inode); + if (!ceph_has_realms_with_quotas(inode)) + return false; + /* return immediately if we're decreasing file size */ if (newsize <= size) return false; @@ -277,6 +293,9 @@ bool ceph_quota_is_max_bytes_approaching(struct inode *inode, loff_t newsize) { loff_t size = ceph_inode(inode)->i_reported_size; + if (!ceph_has_realms_with_quotas(inode)) + return false; + /* return immediately if we're decreasing file size */ if (newsize <= size) return false; diff --git a/fs/ceph/super.h b/fs/ceph/super.h index 8217abf46182..1321a6749953 100644 --- a/fs/ceph/super.h +++ b/fs/ceph/super.h @@ -1075,6 +1075,26 @@ extern int ceph_fs_debugfs_init(struct ceph_fs_client *client); extern void ceph_fs_debugfs_cleanup(struct ceph_fs_client *client); /* quota.c */ +static inline bool __ceph_has_any_quota(struct ceph_inode_info *ci) +{ + return ci->i_max_files || ci->i_max_bytes; +} + +extern void ceph_adjust_quota_realms_count(struct inode *inode, bool inc); + +static inline void __ceph_update_quota(struct ceph_inode_info *ci, + u64 max_bytes, u64 max_files) +{ + bool had_quota, has_quota; + had_quota = __ceph_has_any_quota(ci); + ci->i_max_bytes = max_bytes; + ci->i_max_files = max_files; + has_quota = __ceph_has_any_quota(ci); + + if (had_quota != has_quota) + ceph_adjust_quota_realms_count(&ci->vfs_inode, has_quota); +} + extern void ceph_handle_quota(struct ceph_mds_client *mdsc, struct ceph_mds_session *session, struct ceph_msg *msg); -- cgit v1.2.3-59-g8ed1b From 9122eed5281e89bdb02162a8ecb3cc13ffc8985e Mon Sep 17 00:00:00 2001 From: Luis Henriques Date: Wed, 31 Jan 2018 10:53:13 +0000 Subject: ceph: quota: report root dir quota usage in statfs This commit changes statfs default behaviour when reporting usage statistics. Instead of using the overall filesystem usage, statfs now reports the quota for the filesystem root, if ceph.quota.max_bytes has been set for this inode. If quota hasn't been set, it falls back to the old statfs behaviour. A new mount option is also added ('noquotadf') to disable this behaviour. Signed-off-by: Luis Henriques Reviewed-by: "Yan, Zheng" Signed-off-by: Ilya Dryomov --- Documentation/filesystems/ceph.txt | 4 +++ fs/ceph/quota.c | 56 ++++++++++++++++++++++++++++++++++++++ fs/ceph/super.c | 27 ++++++++++++++++-- fs/ceph/super.h | 3 ++ 4 files changed, 87 insertions(+), 3 deletions(-) diff --git a/Documentation/filesystems/ceph.txt b/Documentation/filesystems/ceph.txt index 094772481263..d7f011ddc150 100644 --- a/Documentation/filesystems/ceph.txt +++ b/Documentation/filesystems/ceph.txt @@ -149,6 +149,10 @@ Mount Options noasyncreaddir Do not use the dcache as above for readdir. + noquotadf + Report overall filesystem usage in statfs instead of using the root + directory quota. + More Information ================ diff --git a/fs/ceph/quota.c b/fs/ceph/quota.c index 588744b4665f..242bfa5c0539 100644 --- a/fs/ceph/quota.c +++ b/fs/ceph/quota.c @@ -18,6 +18,8 @@ * along with this program; if not, see . */ +#include + #include "super.h" #include "mds_client.h" @@ -303,3 +305,57 @@ bool ceph_quota_is_max_bytes_approaching(struct inode *inode, loff_t newsize) return check_quota_exceeded(inode, QUOTA_CHECK_MAX_BYTES_APPROACHING_OP, (newsize - size)); } + +/* + * ceph_quota_update_statfs - if root has quota update statfs with quota status + * @fsc: filesystem client instance + * @buf: statfs to update + * + * If the mounted filesystem root has max_bytes quota set, update the filesystem + * statistics with the quota status. + * + * This function returns true if the stats have been updated, false otherwise. + */ +bool ceph_quota_update_statfs(struct ceph_fs_client *fsc, struct kstatfs *buf) +{ + struct ceph_mds_client *mdsc = fsc->mdsc; + struct ceph_inode_info *ci; + struct ceph_snap_realm *realm; + struct inode *in; + u64 total = 0, used, free; + bool is_updated = false; + + down_read(&mdsc->snap_rwsem); + realm = get_quota_realm(mdsc, d_inode(fsc->sb->s_root)); + up_read(&mdsc->snap_rwsem); + if (!realm) + return false; + + spin_lock(&realm->inodes_with_caps_lock); + in = realm->inode ? igrab(realm->inode) : NULL; + spin_unlock(&realm->inodes_with_caps_lock); + if (in) { + ci = ceph_inode(in); + spin_lock(&ci->i_ceph_lock); + if (ci->i_max_bytes) { + total = ci->i_max_bytes >> CEPH_BLOCK_SHIFT; + used = ci->i_rbytes >> CEPH_BLOCK_SHIFT; + /* It is possible for a quota to be exceeded. + * Report 'zero' in that case + */ + free = total > used ? total - used : 0; + } + spin_unlock(&ci->i_ceph_lock); + if (total) { + buf->f_blocks = total; + buf->f_bfree = free; + buf->f_bavail = free; + is_updated = true; + } + iput(in); + } + ceph_put_snap_realm(mdsc, realm); + + return is_updated; +} + diff --git a/fs/ceph/super.c b/fs/ceph/super.c index 0fc03c456c50..b33082e6878f 100644 --- a/fs/ceph/super.c +++ b/fs/ceph/super.c @@ -76,9 +76,18 @@ static int ceph_statfs(struct dentry *dentry, struct kstatfs *buf) */ buf->f_bsize = 1 << CEPH_BLOCK_SHIFT; buf->f_frsize = 1 << CEPH_BLOCK_SHIFT; - buf->f_blocks = le64_to_cpu(st.kb) >> (CEPH_BLOCK_SHIFT-10); - buf->f_bfree = le64_to_cpu(st.kb_avail) >> (CEPH_BLOCK_SHIFT-10); - buf->f_bavail = le64_to_cpu(st.kb_avail) >> (CEPH_BLOCK_SHIFT-10); + + /* + * By default use root quota for stats; fallback to overall filesystem + * usage if using 'noquotadf' mount option or if the root dir doesn't + * have max_bytes quota set. + */ + if (ceph_test_mount_opt(fsc, NOQUOTADF) || + !ceph_quota_update_statfs(fsc, buf)) { + buf->f_blocks = le64_to_cpu(st.kb) >> (CEPH_BLOCK_SHIFT-10); + buf->f_bfree = le64_to_cpu(st.kb_avail) >> (CEPH_BLOCK_SHIFT-10); + buf->f_bavail = le64_to_cpu(st.kb_avail) >> (CEPH_BLOCK_SHIFT-10); + } buf->f_files = le64_to_cpu(st.num_objects); buf->f_ffree = -1; @@ -151,6 +160,8 @@ enum { Opt_acl, #endif Opt_noacl, + Opt_quotadf, + Opt_noquotadf, }; static match_table_t fsopt_tokens = { @@ -187,6 +198,8 @@ static match_table_t fsopt_tokens = { {Opt_acl, "acl"}, #endif {Opt_noacl, "noacl"}, + {Opt_quotadf, "quotadf"}, + {Opt_noquotadf, "noquotadf"}, {-1, NULL} }; @@ -334,6 +347,12 @@ static int parse_fsopt_token(char *c, void *private) case Opt_norequire_active_mds: fsopt->flags |= CEPH_MOUNT_OPT_MOUNTWAIT; break; + case Opt_quotadf: + fsopt->flags &= ~CEPH_MOUNT_OPT_NOQUOTADF; + break; + case Opt_noquotadf: + fsopt->flags |= CEPH_MOUNT_OPT_NOQUOTADF; + break; #ifdef CONFIG_CEPH_FS_POSIX_ACL case Opt_acl: fsopt->sb_flags |= SB_POSIXACL; @@ -520,6 +539,8 @@ static int ceph_show_options(struct seq_file *m, struct dentry *root) } if (fsopt->flags & CEPH_MOUNT_OPT_NOPOOLPERM) seq_puts(m, ",nopoolperm"); + if (fsopt->flags & CEPH_MOUNT_OPT_NOQUOTADF) + seq_puts(m, ",noquotadf"); #ifdef CONFIG_CEPH_FS_POSIX_ACL if (fsopt->sb_flags & SB_POSIXACL) diff --git a/fs/ceph/super.h b/fs/ceph/super.h index 1321a6749953..a7077a0c989f 100644 --- a/fs/ceph/super.h +++ b/fs/ceph/super.h @@ -39,6 +39,7 @@ #define CEPH_MOUNT_OPT_FSCACHE (1<<10) /* use fscache */ #define CEPH_MOUNT_OPT_NOPOOLPERM (1<<11) /* no pool permission check */ #define CEPH_MOUNT_OPT_MOUNTWAIT (1<<12) /* mount waits if no mds is up */ +#define CEPH_MOUNT_OPT_NOQUOTADF (1<<13) /* no root dir quota in statfs */ #define CEPH_MOUNT_OPT_DEFAULT CEPH_MOUNT_OPT_DCACHE @@ -1104,5 +1105,7 @@ extern bool ceph_quota_is_max_bytes_exceeded(struct inode *inode, loff_t newlen); extern bool ceph_quota_is_max_bytes_approaching(struct inode *inode, loff_t newlen); +extern bool ceph_quota_update_statfs(struct ceph_fs_client *fsc, + struct kstatfs *buf); #endif /* _FS_CEPH_SUPER_H */ -- cgit v1.2.3-59-g8ed1b