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authorLinus Torvalds <torvalds@linux-foundation.org>2015-11-13 09:24:40 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2015-11-13 09:24:40 -0800
commitca4ba96e02e932a0c9997a40fd51253b5b2d0f9d (patch)
treeca7cc57de628ec777d0fcda3425fcbba8b53d4ca /fs
parentMerge tag '4.4-additional' of git://git.lwn.net/linux (diff)
parentlibceph: clear msg->con in ceph_msg_release() only (diff)
downloadlinux-dev-ca4ba96e02e932a0c9997a40fd51253b5b2d0f9d.tar.xz
linux-dev-ca4ba96e02e932a0c9997a40fd51253b5b2d0f9d.zip
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/sage/ceph-client
Pull Ceph updates from Sage Weil: "There are several patches from Ilya fixing RBD allocation lifecycle issues, a series adding a nocephx_sign_messages option (and associated bug fixes/cleanups), several patches from Zheng improving the (directory) fsync behavior, a big improvement in IO for direct-io requests when striping is enabled from Caifeng, and several other small fixes and cleanups" * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/sage/ceph-client: libceph: clear msg->con in ceph_msg_release() only libceph: add nocephx_sign_messages option libceph: stop duplicating client fields in messenger libceph: drop authorizer check from cephx msg signing routines libceph: msg signing callouts don't need con argument libceph: evaluate osd_req_op_data() arguments only once ceph: make fsync() wait unsafe requests that created/modified inode ceph: add request to i_unsafe_dirops when getting unsafe reply libceph: introduce ceph_x_authorizer_cleanup() ceph: don't invalidate page cache when inode is no longer used rbd: remove duplicate calls to rbd_dev_mapping_clear() rbd: set device_type::release instead of device::release rbd: don't free rbd_dev outside of the release callback rbd: return -ENOMEM instead of pool id if rbd_dev_create() fails libceph: use local variable cursor instead of &msg->cursor libceph: remove con argument in handle_reply() ceph: combine as many iovec as possile into one OSD request ceph: fix message length computation ceph: fix a comment typo rbd: drop null test before destroy functions
Diffstat (limited to 'fs')
-rw-r--r--fs/ceph/cache.c2
-rw-r--r--fs/ceph/caps.c76
-rw-r--r--fs/ceph/file.c87
-rw-r--r--fs/ceph/inode.c1
-rw-r--r--fs/ceph/mds_client.c57
-rw-r--r--fs/ceph/mds_client.h3
-rw-r--r--fs/ceph/super.h1
7 files changed, 161 insertions, 66 deletions
diff --git a/fs/ceph/cache.c b/fs/ceph/cache.c
index 834f9f3723fb..a4766ded1ba7 100644
--- a/fs/ceph/cache.c
+++ b/fs/ceph/cache.c
@@ -88,7 +88,7 @@ static uint16_t ceph_fscache_inode_get_key(const void *cookie_netfs_data,
const struct ceph_inode_info* ci = cookie_netfs_data;
uint16_t klen;
- /* use ceph virtual inode (id + snaphot) */
+ /* use ceph virtual inode (id + snapshot) */
klen = sizeof(ci->i_vino);
if (klen > maxbuf)
return 0;
diff --git a/fs/ceph/caps.c b/fs/ceph/caps.c
index 27b566874bc1..c69e1253b47b 100644
--- a/fs/ceph/caps.c
+++ b/fs/ceph/caps.c
@@ -1655,9 +1655,8 @@ retry_locked:
!S_ISDIR(inode->i_mode) && /* ignore readdir cache */
ci->i_wrbuffer_ref == 0 && /* no dirty pages... */
inode->i_data.nrpages && /* have cached pages */
- (file_wanted == 0 || /* no open files */
- (revoking & (CEPH_CAP_FILE_CACHE|
- CEPH_CAP_FILE_LAZYIO))) && /* or revoking cache */
+ (revoking & (CEPH_CAP_FILE_CACHE|
+ CEPH_CAP_FILE_LAZYIO)) && /* or revoking cache */
!tried_invalidate) {
dout("check_caps trying to invalidate on %p\n", inode);
if (try_nonblocking_invalidate(inode) < 0) {
@@ -1971,49 +1970,46 @@ out:
}
/*
- * wait for any uncommitted directory operations to commit.
+ * wait for any unsafe requests to complete.
*/
-static int unsafe_dirop_wait(struct inode *inode)
+static int unsafe_request_wait(struct inode *inode)
{
struct ceph_inode_info *ci = ceph_inode(inode);
- struct list_head *head = &ci->i_unsafe_dirops;
- struct ceph_mds_request *req;
- u64 last_tid;
- int ret = 0;
-
- if (!S_ISDIR(inode->i_mode))
- return 0;
+ struct ceph_mds_request *req1 = NULL, *req2 = NULL;
+ int ret, err = 0;
spin_lock(&ci->i_unsafe_lock);
- if (list_empty(head))
- goto out;
-
- req = list_last_entry(head, struct ceph_mds_request,
- r_unsafe_dir_item);
- last_tid = req->r_tid;
-
- do {
- ceph_mdsc_get_request(req);
- spin_unlock(&ci->i_unsafe_lock);
+ if (S_ISDIR(inode->i_mode) && !list_empty(&ci->i_unsafe_dirops)) {
+ req1 = list_last_entry(&ci->i_unsafe_dirops,
+ struct ceph_mds_request,
+ r_unsafe_dir_item);
+ ceph_mdsc_get_request(req1);
+ }
+ if (!list_empty(&ci->i_unsafe_iops)) {
+ req2 = list_last_entry(&ci->i_unsafe_iops,
+ struct ceph_mds_request,
+ r_unsafe_target_item);
+ ceph_mdsc_get_request(req2);
+ }
+ spin_unlock(&ci->i_unsafe_lock);
- dout("unsafe_dirop_wait %p wait on tid %llu (until %llu)\n",
- inode, req->r_tid, last_tid);
- ret = !wait_for_completion_timeout(&req->r_safe_completion,
- ceph_timeout_jiffies(req->r_timeout));
+ dout("unsafe_requeset_wait %p wait on tid %llu %llu\n",
+ inode, req1 ? req1->r_tid : 0ULL, req2 ? req2->r_tid : 0ULL);
+ if (req1) {
+ ret = !wait_for_completion_timeout(&req1->r_safe_completion,
+ ceph_timeout_jiffies(req1->r_timeout));
if (ret)
- ret = -EIO; /* timed out */
-
- ceph_mdsc_put_request(req);
-
- spin_lock(&ci->i_unsafe_lock);
- if (ret || list_empty(head))
- break;
- req = list_first_entry(head, struct ceph_mds_request,
- r_unsafe_dir_item);
- } while (req->r_tid < last_tid);
-out:
- spin_unlock(&ci->i_unsafe_lock);
- return ret;
+ err = -EIO;
+ ceph_mdsc_put_request(req1);
+ }
+ if (req2) {
+ ret = !wait_for_completion_timeout(&req2->r_safe_completion,
+ ceph_timeout_jiffies(req2->r_timeout));
+ if (ret)
+ err = -EIO;
+ ceph_mdsc_put_request(req2);
+ }
+ return err;
}
int ceph_fsync(struct file *file, loff_t start, loff_t end, int datasync)
@@ -2039,7 +2035,7 @@ int ceph_fsync(struct file *file, loff_t start, loff_t end, int datasync)
dirty = try_flush_caps(inode, &flush_tid);
dout("fsync dirty caps are %s\n", ceph_cap_string(dirty));
- ret = unsafe_dirop_wait(inode);
+ ret = unsafe_request_wait(inode);
/*
* only wait on non-file metadata writeback (the mds
diff --git a/fs/ceph/file.c b/fs/ceph/file.c
index 0c62868b5c56..3c68e6aee2f0 100644
--- a/fs/ceph/file.c
+++ b/fs/ceph/file.c
@@ -34,6 +34,74 @@
* need to wait for MDS acknowledgement.
*/
+/*
+ * Calculate the length sum of direct io vectors that can
+ * be combined into one page vector.
+ */
+static size_t dio_get_pagev_size(const struct iov_iter *it)
+{
+ const struct iovec *iov = it->iov;
+ const struct iovec *iovend = iov + it->nr_segs;
+ size_t size;
+
+ size = iov->iov_len - it->iov_offset;
+ /*
+ * An iov can be page vectored when both the current tail
+ * and the next base are page aligned.
+ */
+ while (PAGE_ALIGNED((iov->iov_base + iov->iov_len)) &&
+ (++iov < iovend && PAGE_ALIGNED((iov->iov_base)))) {
+ size += iov->iov_len;
+ }
+ dout("dio_get_pagevlen len = %zu\n", size);
+ return size;
+}
+
+/*
+ * Allocate a page vector based on (@it, @nbytes).
+ * The return value is the tuple describing a page vector,
+ * that is (@pages, @page_align, @num_pages).
+ */
+static struct page **
+dio_get_pages_alloc(const struct iov_iter *it, size_t nbytes,
+ size_t *page_align, int *num_pages)
+{
+ struct iov_iter tmp_it = *it;
+ size_t align;
+ struct page **pages;
+ int ret = 0, idx, npages;
+
+ align = (unsigned long)(it->iov->iov_base + it->iov_offset) &
+ (PAGE_SIZE - 1);
+ npages = calc_pages_for(align, nbytes);
+ pages = kmalloc(sizeof(*pages) * npages, GFP_KERNEL);
+ if (!pages) {
+ pages = vmalloc(sizeof(*pages) * npages);
+ if (!pages)
+ return ERR_PTR(-ENOMEM);
+ }
+
+ for (idx = 0; idx < npages; ) {
+ size_t start;
+ ret = iov_iter_get_pages(&tmp_it, pages + idx, nbytes,
+ npages - idx, &start);
+ if (ret < 0)
+ goto fail;
+
+ iov_iter_advance(&tmp_it, ret);
+ nbytes -= ret;
+ idx += (ret + start + PAGE_SIZE - 1) / PAGE_SIZE;
+ }
+
+ BUG_ON(nbytes != 0);
+ *num_pages = npages;
+ *page_align = align;
+ dout("dio_get_pages_alloc: got %d pages align %zu\n", npages, align);
+ return pages;
+fail:
+ ceph_put_page_vector(pages, idx, false);
+ return ERR_PTR(ret);
+}
/*
* Prepare an open request. Preallocate ceph_cap to avoid an
@@ -458,11 +526,10 @@ static ssize_t ceph_sync_read(struct kiocb *iocb, struct iov_iter *i,
size_t start;
ssize_t n;
- n = iov_iter_get_pages_alloc(i, &pages, INT_MAX, &start);
- if (n < 0)
- return n;
-
- num_pages = (n + start + PAGE_SIZE - 1) / PAGE_SIZE;
+ n = dio_get_pagev_size(i);
+ pages = dio_get_pages_alloc(i, n, &start, &num_pages);
+ if (IS_ERR(pages))
+ return PTR_ERR(pages);
ret = striped_read(inode, off, n,
pages, num_pages, checkeof,
@@ -592,7 +659,7 @@ ceph_sync_direct_write(struct kiocb *iocb, struct iov_iter *from, loff_t pos,
CEPH_OSD_FLAG_WRITE;
while (iov_iter_count(from) > 0) {
- u64 len = iov_iter_single_seg_count(from);
+ u64 len = dio_get_pagev_size(from);
size_t start;
ssize_t n;
@@ -611,14 +678,14 @@ ceph_sync_direct_write(struct kiocb *iocb, struct iov_iter *from, loff_t pos,
osd_req_op_init(req, 1, CEPH_OSD_OP_STARTSYNC, 0);
- n = iov_iter_get_pages_alloc(from, &pages, len, &start);
- if (unlikely(n < 0)) {
- ret = n;
+ n = len;
+ pages = dio_get_pages_alloc(from, len, &start, &num_pages);
+ if (IS_ERR(pages)) {
ceph_osdc_put_request(req);
+ ret = PTR_ERR(pages);
break;
}
- num_pages = (n + start + PAGE_SIZE - 1) / PAGE_SIZE;
/*
* throw out any page cache pages in this range. this
* may block.
diff --git a/fs/ceph/inode.c b/fs/ceph/inode.c
index 96d2bd829902..498dcfa2dcdb 100644
--- a/fs/ceph/inode.c
+++ b/fs/ceph/inode.c
@@ -452,6 +452,7 @@ struct inode *ceph_alloc_inode(struct super_block *sb)
INIT_LIST_HEAD(&ci->i_unsafe_writes);
INIT_LIST_HEAD(&ci->i_unsafe_dirops);
+ INIT_LIST_HEAD(&ci->i_unsafe_iops);
spin_lock_init(&ci->i_unsafe_lock);
ci->i_snap_realm = NULL;
diff --git a/fs/ceph/mds_client.c b/fs/ceph/mds_client.c
index 51cb02da75d9..e7b130a637f9 100644
--- a/fs/ceph/mds_client.c
+++ b/fs/ceph/mds_client.c
@@ -633,13 +633,8 @@ static void __register_request(struct ceph_mds_client *mdsc,
mdsc->oldest_tid = req->r_tid;
if (dir) {
- struct ceph_inode_info *ci = ceph_inode(dir);
-
ihold(dir);
- spin_lock(&ci->i_unsafe_lock);
req->r_unsafe_dir = dir;
- list_add_tail(&req->r_unsafe_dir_item, &ci->i_unsafe_dirops);
- spin_unlock(&ci->i_unsafe_lock);
}
}
@@ -665,13 +660,20 @@ static void __unregister_request(struct ceph_mds_client *mdsc,
rb_erase(&req->r_node, &mdsc->request_tree);
RB_CLEAR_NODE(&req->r_node);
- if (req->r_unsafe_dir) {
+ if (req->r_unsafe_dir && req->r_got_unsafe) {
struct ceph_inode_info *ci = ceph_inode(req->r_unsafe_dir);
-
spin_lock(&ci->i_unsafe_lock);
list_del_init(&req->r_unsafe_dir_item);
spin_unlock(&ci->i_unsafe_lock);
+ }
+ if (req->r_target_inode && req->r_got_unsafe) {
+ struct ceph_inode_info *ci = ceph_inode(req->r_target_inode);
+ spin_lock(&ci->i_unsafe_lock);
+ list_del_init(&req->r_unsafe_target_item);
+ spin_unlock(&ci->i_unsafe_lock);
+ }
+ if (req->r_unsafe_dir) {
iput(req->r_unsafe_dir);
req->r_unsafe_dir = NULL;
}
@@ -1430,6 +1432,13 @@ static int trim_caps_cb(struct inode *inode, struct ceph_cap *cap, void *arg)
if ((used | wanted) & CEPH_CAP_ANY_WR)
goto out;
}
+ /* The inode has cached pages, but it's no longer used.
+ * we can safely drop it */
+ if (wanted == 0 && used == CEPH_CAP_FILE_CACHE &&
+ !(oissued & CEPH_CAP_FILE_CACHE)) {
+ used = 0;
+ oissued = 0;
+ }
if ((used | wanted) & ~oissued & mine)
goto out; /* we need these caps */
@@ -1438,7 +1447,7 @@ static int trim_caps_cb(struct inode *inode, struct ceph_cap *cap, void *arg)
/* we aren't the only cap.. just remove us */
__ceph_remove_cap(cap, true);
} else {
- /* try to drop referring dentries */
+ /* try dropping referring dentries */
spin_unlock(&ci->i_ceph_lock);
d_prune_aliases(inode);
dout("trim_caps_cb %p cap %p pruned, count now %d\n",
@@ -1704,6 +1713,7 @@ ceph_mdsc_create_request(struct ceph_mds_client *mdsc, int op, int mode)
req->r_started = jiffies;
req->r_resend_mds = -1;
INIT_LIST_HEAD(&req->r_unsafe_dir_item);
+ INIT_LIST_HEAD(&req->r_unsafe_target_item);
req->r_fmode = -1;
kref_init(&req->r_kref);
INIT_LIST_HEAD(&req->r_wait);
@@ -1935,7 +1945,7 @@ static struct ceph_msg *create_request_message(struct ceph_mds_client *mdsc,
len = sizeof(*head) +
pathlen1 + pathlen2 + 2*(1 + sizeof(u32) + sizeof(u64)) +
- sizeof(struct timespec);
+ sizeof(struct ceph_timespec);
/* calculate (max) length for cap releases */
len += sizeof(struct ceph_mds_request_release) *
@@ -2477,6 +2487,14 @@ static void handle_reply(struct ceph_mds_session *session, struct ceph_msg *msg)
} else {
req->r_got_unsafe = true;
list_add_tail(&req->r_unsafe_item, &req->r_session->s_unsafe);
+ if (req->r_unsafe_dir) {
+ struct ceph_inode_info *ci =
+ ceph_inode(req->r_unsafe_dir);
+ spin_lock(&ci->i_unsafe_lock);
+ list_add_tail(&req->r_unsafe_dir_item,
+ &ci->i_unsafe_dirops);
+ spin_unlock(&ci->i_unsafe_lock);
+ }
}
dout("handle_reply tid %lld result %d\n", tid, result);
@@ -2518,6 +2536,13 @@ static void handle_reply(struct ceph_mds_session *session, struct ceph_msg *msg)
up_read(&mdsc->snap_rwsem);
if (realm)
ceph_put_snap_realm(mdsc, realm);
+
+ if (err == 0 && req->r_got_unsafe && req->r_target_inode) {
+ struct ceph_inode_info *ci = ceph_inode(req->r_target_inode);
+ spin_lock(&ci->i_unsafe_lock);
+ list_add_tail(&req->r_unsafe_target_item, &ci->i_unsafe_iops);
+ spin_unlock(&ci->i_unsafe_lock);
+ }
out_err:
mutex_lock(&mdsc->mutex);
if (!req->r_aborted) {
@@ -3917,17 +3942,19 @@ static struct ceph_msg *mds_alloc_msg(struct ceph_connection *con,
return msg;
}
-static int sign_message(struct ceph_connection *con, struct ceph_msg *msg)
+static int mds_sign_message(struct ceph_msg *msg)
{
- struct ceph_mds_session *s = con->private;
+ struct ceph_mds_session *s = msg->con->private;
struct ceph_auth_handshake *auth = &s->s_auth;
+
return ceph_auth_sign_message(auth, msg);
}
-static int check_message_signature(struct ceph_connection *con, struct ceph_msg *msg)
+static int mds_check_message_signature(struct ceph_msg *msg)
{
- struct ceph_mds_session *s = con->private;
+ struct ceph_mds_session *s = msg->con->private;
struct ceph_auth_handshake *auth = &s->s_auth;
+
return ceph_auth_check_message_signature(auth, msg);
}
@@ -3940,8 +3967,8 @@ static const struct ceph_connection_operations mds_con_ops = {
.invalidate_authorizer = invalidate_authorizer,
.peer_reset = peer_reset,
.alloc_msg = mds_alloc_msg,
- .sign_message = sign_message,
- .check_message_signature = check_message_signature,
+ .sign_message = mds_sign_message,
+ .check_message_signature = mds_check_message_signature,
};
/* eof */
diff --git a/fs/ceph/mds_client.h b/fs/ceph/mds_client.h
index f575eafe2261..ccf11ef0ca87 100644
--- a/fs/ceph/mds_client.h
+++ b/fs/ceph/mds_client.h
@@ -236,6 +236,9 @@ struct ceph_mds_request {
struct inode *r_unsafe_dir;
struct list_head r_unsafe_dir_item;
+ /* unsafe requests that modify the target inode */
+ struct list_head r_unsafe_target_item;
+
struct ceph_mds_session *r_session;
int r_attempts; /* resend attempts */
diff --git a/fs/ceph/super.h b/fs/ceph/super.h
index 2f2460d23a06..75b7d125ce66 100644
--- a/fs/ceph/super.h
+++ b/fs/ceph/super.h
@@ -342,6 +342,7 @@ struct ceph_inode_info {
struct list_head i_unsafe_writes; /* uncommitted sync writes */
struct list_head i_unsafe_dirops; /* uncommitted mds dir ops */
+ struct list_head i_unsafe_iops; /* uncommitted mds inode ops */
spinlock_t i_unsafe_lock;
struct ceph_snap_realm *i_snap_realm; /* snap realm (if caps) */