diff options
Diffstat (limited to 'drivers/block/drbd/drbd_receiver.c')
-rw-r--r-- | drivers/block/drbd/drbd_receiver.c | 141 |
1 files changed, 43 insertions, 98 deletions
diff --git a/drivers/block/drbd/drbd_receiver.c b/drivers/block/drbd/drbd_receiver.c index 1f740e42e457..ee69d50ba4fd 100644 --- a/drivers/block/drbd/drbd_receiver.c +++ b/drivers/block/drbd/drbd_receiver.c @@ -364,7 +364,7 @@ drbd_alloc_peer_req(struct drbd_peer_device *peer_device, u64 id, sector_t secto struct drbd_device *device = peer_device->device; struct drbd_peer_request *peer_req; struct page *page = NULL; - unsigned nr_pages = (payload_size + PAGE_SIZE -1) >> PAGE_SHIFT; + unsigned int nr_pages = PFN_UP(payload_size); if (drbd_insert_fault(device, DRBD_FAULT_AL_EE)) return NULL; @@ -781,7 +781,7 @@ static struct socket *drbd_wait_for_connect(struct drbd_connection *connection, timeo = connect_int * HZ; /* 28.5% random jitter */ - timeo += (prandom_u32() & 1) ? timeo / 7 : -timeo / 7; + timeo += prandom_u32_max(2) ? timeo / 7 : -timeo / 7; err = wait_for_completion_interruptible_timeout(&ad->door_bell, timeo); if (err <= 0) @@ -1004,7 +1004,7 @@ retry: drbd_warn(connection, "Error receiving initial packet\n"); sock_release(s); randomize: - if (prandom_u32() & 1) + if (prandom_u32_max(2)) goto retry; } } @@ -1279,16 +1279,16 @@ static void one_flush_endio(struct bio *bio) static void submit_one_flush(struct drbd_device *device, struct issue_flush_context *ctx) { - struct bio *bio = bio_alloc(GFP_NOIO, 0); + struct bio *bio = bio_alloc(device->ldev->backing_bdev, 0, + REQ_OP_FLUSH | REQ_PREFLUSH, GFP_NOIO); struct one_flush_context *octx = kmalloc(sizeof(*octx), GFP_NOIO); - if (!bio || !octx) { - drbd_warn(device, "Could not allocate a bio, CANNOT ISSUE FLUSH\n"); + + if (!octx) { + drbd_warn(device, "Could not allocate a octx, CANNOT ISSUE FLUSH\n"); /* FIXME: what else can I do now? disconnecting or detaching * really does not help to improve the state of the world, either. */ - kfree(octx); - if (bio) - bio_put(bio); + bio_put(bio); ctx->error = -ENOMEM; put_ldev(device); @@ -1298,10 +1298,8 @@ static void submit_one_flush(struct drbd_device *device, struct issue_flush_cont octx->device = device; octx->ctx = ctx; - bio_set_dev(bio, device->ldev->backing_bdev); bio->bi_private = octx; bio->bi_end_io = one_flush_endio; - bio->bi_opf = REQ_OP_FLUSH | REQ_PREFLUSH; device->flush_jif = jiffies; set_bit(FLUSH_PENDING, &device->flags); @@ -1513,7 +1511,6 @@ void drbd_bump_write_ordering(struct drbd_resource *resource, struct drbd_backin int drbd_issue_discard_or_zero_out(struct drbd_device *device, sector_t start, unsigned int nr_sectors, int flags) { struct block_device *bdev = device->ldev->backing_bdev; - struct request_queue *q = bdev_get_queue(bdev); sector_t tmp, nr; unsigned int max_discard_sectors, granularity; int alignment; @@ -1523,10 +1520,10 @@ int drbd_issue_discard_or_zero_out(struct drbd_device *device, sector_t start, u goto zero_out; /* Zero-sector (unknown) and one-sector granularities are the same. */ - granularity = max(q->limits.discard_granularity >> 9, 1U); + granularity = max(bdev_discard_granularity(bdev) >> 9, 1U); alignment = (bdev_discard_alignment(bdev) >> 9) % granularity; - max_discard_sectors = min(q->limits.max_discard_sectors, (1U << 22)); + max_discard_sectors = min(bdev_max_discard_sectors(bdev), (1U << 22)); max_discard_sectors -= max_discard_sectors % granularity; if (unlikely(!max_discard_sectors)) goto zero_out; @@ -1550,7 +1547,8 @@ int drbd_issue_discard_or_zero_out(struct drbd_device *device, sector_t start, u start = tmp; } while (nr_sectors >= max_discard_sectors) { - err |= blkdev_issue_discard(bdev, start, max_discard_sectors, GFP_NOIO, 0); + err |= blkdev_issue_discard(bdev, start, max_discard_sectors, + GFP_NOIO); nr_sectors -= max_discard_sectors; start += max_discard_sectors; } @@ -1562,7 +1560,7 @@ int drbd_issue_discard_or_zero_out(struct drbd_device *device, sector_t start, u nr = nr_sectors; nr -= (unsigned int)nr % granularity; if (nr) { - err |= blkdev_issue_discard(bdev, start, nr, GFP_NOIO, 0); + err |= blkdev_issue_discard(bdev, start, nr, GFP_NOIO); nr_sectors -= nr; start += nr; } @@ -1577,11 +1575,10 @@ int drbd_issue_discard_or_zero_out(struct drbd_device *device, sector_t start, u static bool can_do_reliable_discards(struct drbd_device *device) { - struct request_queue *q = bdev_get_queue(device->ldev->backing_bdev); struct disk_conf *dc; bool can_do; - if (!blk_queue_discard(q)) + if (!bdev_max_discard_sectors(device->ldev->backing_bdev)) return false; rcu_read_lock(); @@ -1606,19 +1603,7 @@ static void drbd_issue_peer_discard_or_zero_out(struct drbd_device *device, stru drbd_endio_write_sec_final(peer_req); } -static void drbd_issue_peer_wsame(struct drbd_device *device, - struct drbd_peer_request *peer_req) -{ - struct block_device *bdev = device->ldev->backing_bdev; - sector_t s = peer_req->i.sector; - sector_t nr = peer_req->i.size >> 9; - if (blkdev_issue_write_same(bdev, s, nr, GFP_NOIO, peer_req->pages)) - peer_req->flags |= EE_WAS_ERROR; - drbd_endio_write_sec_final(peer_req); -} - - -/* +/** * drbd_submit_peer_request() * @device: DRBD device. * @peer_req: peer request @@ -1636,17 +1621,15 @@ static void drbd_issue_peer_wsame(struct drbd_device *device, /* TODO allocate from our own bio_set. */ int drbd_submit_peer_request(struct drbd_device *device, struct drbd_peer_request *peer_req, - const unsigned op, const unsigned op_flags, - const int fault_type) + const blk_opf_t opf, const int fault_type) { struct bio *bios = NULL; struct bio *bio; struct page *page = peer_req->pages; sector_t sector = peer_req->i.sector; - unsigned data_size = peer_req->i.size; - unsigned n_bios = 0; - unsigned nr_pages = (data_size + PAGE_SIZE -1) >> PAGE_SHIFT; - int err = -ENOMEM; + unsigned int data_size = peer_req->i.size; + unsigned int n_bios = 0; + unsigned int nr_pages = PFN_UP(data_size); /* TRIM/DISCARD: for now, always use the helper function * blkdev_issue_zeroout(..., discard=true). @@ -1654,7 +1637,7 @@ int drbd_submit_peer_request(struct drbd_device *device, * Correctness first, performance later. Next step is to code an * asynchronous variant of the same. */ - if (peer_req->flags & (EE_TRIM|EE_WRITE_SAME|EE_ZEROOUT)) { + if (peer_req->flags & (EE_TRIM | EE_ZEROOUT)) { /* wait for all pending IO completions, before we start * zeroing things out. */ conn_wait_active_ee_empty(peer_req->peer_device->connection); @@ -1671,10 +1654,7 @@ int drbd_submit_peer_request(struct drbd_device *device, spin_unlock_irq(&device->resource->req_lock); } - if (peer_req->flags & (EE_TRIM|EE_ZEROOUT)) - drbd_issue_peer_discard_or_zero_out(device, peer_req); - else /* EE_WRITE_SAME */ - drbd_issue_peer_wsame(device, peer_req); + drbd_issue_peer_discard_or_zero_out(device, peer_req); return 0; } @@ -1687,15 +1667,9 @@ int drbd_submit_peer_request(struct drbd_device *device, * generated bio, but a bio allocated on behalf of the peer. */ next_bio: - bio = bio_alloc(GFP_NOIO, nr_pages); - if (!bio) { - drbd_err(device, "submit_ee: Allocation of a bio failed (nr_pages=%u)\n", nr_pages); - goto fail; - } + bio = bio_alloc(device->ldev->backing_bdev, nr_pages, opf, GFP_NOIO); /* > peer_req->i.sector, unless this is the first bio */ bio->bi_iter.bi_sector = sector; - bio_set_dev(bio, device->ldev->backing_bdev); - bio_set_op_attrs(bio, op, op_flags); bio->bi_private = peer_req; bio->bi_end_io = drbd_peer_request_endio; @@ -1726,14 +1700,6 @@ next_bio: drbd_submit_bio_noacct(device, fault_type, bio); } while (bios); return 0; - -fail: - while (bios) { - bio = bios; - bios = bios->bi_next; - bio_put(bio); - } - return err; } static void drbd_remove_epoch_entry_interval(struct drbd_device *device, @@ -1870,7 +1836,6 @@ read_in_block(struct drbd_peer_device *peer_device, u64 id, sector_t sector, unsigned long *data; struct p_trim *trim = (pi->cmd == P_TRIM) ? pi->data : NULL; struct p_trim *zeroes = (pi->cmd == P_ZEROES) ? pi->data : NULL; - struct p_trim *wsame = (pi->cmd == P_WSAME) ? pi->data : NULL; digest_size = 0; if (!trim && peer_device->connection->peer_integrity_tfm) { @@ -1885,7 +1850,7 @@ read_in_block(struct drbd_peer_device *peer_device, u64 id, sector_t sector, data_size -= digest_size; } - /* assume request_size == data_size, but special case trim and wsame. */ + /* assume request_size == data_size, but special case trim. */ ds = data_size; if (trim) { if (!expect(data_size == 0)) @@ -1895,23 +1860,11 @@ read_in_block(struct drbd_peer_device *peer_device, u64 id, sector_t sector, if (!expect(data_size == 0)) return NULL; ds = be32_to_cpu(zeroes->size); - } else if (wsame) { - if (data_size != queue_logical_block_size(device->rq_queue)) { - drbd_err(peer_device, "data size (%u) != drbd logical block size (%u)\n", - data_size, queue_logical_block_size(device->rq_queue)); - return NULL; - } - if (data_size != bdev_logical_block_size(device->ldev->backing_bdev)) { - drbd_err(peer_device, "data size (%u) != backend logical block size (%u)\n", - data_size, bdev_logical_block_size(device->ldev->backing_bdev)); - return NULL; - } - ds = be32_to_cpu(wsame->size); } if (!expect(IS_ALIGNED(ds, 512))) return NULL; - if (trim || wsame || zeroes) { + if (trim || zeroes) { if (!expect(ds <= (DRBD_MAX_BBIO_SECTORS << 9))) return NULL; } else if (!expect(ds <= DRBD_MAX_BIO_SIZE)) @@ -1943,8 +1896,6 @@ read_in_block(struct drbd_peer_device *peer_device, u64 id, sector_t sector, peer_req->flags |= EE_ZEROOUT; return peer_req; } - if (wsame) - peer_req->flags |= EE_WRITE_SAME; /* receive payload size bytes into page chain */ ds = data_size; @@ -2033,10 +1984,10 @@ static int recv_dless_read(struct drbd_peer_device *peer_device, struct drbd_req D_ASSERT(peer_device->device, sector == bio->bi_iter.bi_sector); bio_for_each_segment(bvec, bio, iter) { - void *mapped = kmap(bvec.bv_page) + bvec.bv_offset; + void *mapped = bvec_kmap_local(&bvec); expect = min_t(int, data_size, bvec.bv_len); err = drbd_recv_all_warn(peer_device->connection, mapped, expect); - kunmap(bvec.bv_page); + kunmap_local(mapped); if (err) return err; data_size -= expect; @@ -2107,7 +2058,7 @@ static int recv_resync_read(struct drbd_peer_device *peer_device, sector_t secto spin_unlock_irq(&device->resource->req_lock); atomic_add(pi->size >> 9, &device->rs_sect_ev); - if (drbd_submit_peer_request(device, peer_req, REQ_OP_WRITE, 0, + if (drbd_submit_peer_request(device, peer_req, REQ_OP_WRITE, DRBD_FAULT_RS_WR) == 0) return 0; @@ -2162,9 +2113,6 @@ static int receive_DataReply(struct drbd_connection *connection, struct packet_i if (unlikely(!req)) return -EIO; - /* hlist_del(&req->collision) is done in _req_may_be_done, to avoid - * special casing it there for the various failure cases. - * still no race with drbd_fail_pending_reads */ err = recv_dless_read(peer_device, req, sector, pi->size); if (!err) req_mod(req, DATA_RECEIVED); @@ -2430,21 +2378,19 @@ static int wait_for_and_update_peer_seq(struct drbd_peer_device *peer_device, co /* see also bio_flags_to_wire() * DRBD_REQ_*, because we need to semantically map the flags to data packet * flags and back. We may replicate to other kernel versions. */ -static unsigned long wire_flags_to_bio_flags(u32 dpf) +static blk_opf_t wire_flags_to_bio_flags(u32 dpf) { return (dpf & DP_RW_SYNC ? REQ_SYNC : 0) | (dpf & DP_FUA ? REQ_FUA : 0) | (dpf & DP_FLUSH ? REQ_PREFLUSH : 0); } -static unsigned long wire_flags_to_bio_op(u32 dpf) +static enum req_op wire_flags_to_bio_op(u32 dpf) { if (dpf & DP_ZEROES) return REQ_OP_WRITE_ZEROES; if (dpf & DP_DISCARD) return REQ_OP_DISCARD; - if (dpf & DP_WSAME) - return REQ_OP_WRITE_SAME; else return REQ_OP_WRITE; } @@ -2592,7 +2538,8 @@ static int receive_Data(struct drbd_connection *connection, struct packet_info * struct drbd_peer_request *peer_req; struct p_data *p = pi->data; u32 peer_seq = be32_to_cpu(p->seq_num); - int op, op_flags; + enum req_op op; + blk_opf_t op_flags; u32 dp_flags; int err, tp; @@ -2711,11 +2658,11 @@ static int receive_Data(struct drbd_connection *connection, struct packet_info * update_peer_seq(peer_device, peer_seq); spin_lock_irq(&device->resource->req_lock); } - /* TRIM and WRITE_SAME are processed synchronously, + /* TRIM and is processed synchronously, * we wait for all pending requests, respectively wait for * active_ee to become empty in drbd_submit_peer_request(); * better not add ourselves here. */ - if ((peer_req->flags & (EE_TRIM|EE_WRITE_SAME|EE_ZEROOUT)) == 0) + if ((peer_req->flags & (EE_TRIM | EE_ZEROOUT)) == 0) list_add_tail(&peer_req->w.list, &device->active_ee); spin_unlock_irq(&device->resource->req_lock); @@ -2730,7 +2677,7 @@ static int receive_Data(struct drbd_connection *connection, struct packet_info * peer_req->flags |= EE_CALL_AL_COMPLETE_IO; } - err = drbd_submit_peer_request(device, peer_req, op, op_flags, + err = drbd_submit_peer_request(device, peer_req, op | op_flags, DRBD_FAULT_DT_WR); if (!err) return 0; @@ -3028,7 +2975,7 @@ submit_for_resync: submit: update_receiver_timing_details(connection, drbd_submit_peer_request); inc_unacked(device); - if (drbd_submit_peer_request(device, peer_req, REQ_OP_READ, 0, + if (drbd_submit_peer_request(device, peer_req, REQ_OP_READ, fault_type) == 0) return 0; @@ -3799,8 +3746,7 @@ static int receive_protocol(struct drbd_connection *connection, struct packet_in drbd_info(connection, "peer data-integrity-alg: %s\n", integrity_alg[0] ? integrity_alg : "(none)"); - synchronize_rcu(); - kfree(old_net_conf); + kvfree_rcu(old_net_conf); return 0; disconnect_rcu_unlock: @@ -3921,7 +3867,8 @@ static int receive_SyncParam(struct drbd_connection *connection, struct packet_i /* initialize verify_alg and csums_alg */ p = pi->data; - memset(p->verify_alg, 0, 2 * SHARED_SECRET_MAX); + BUILD_BUG_ON(sizeof(p->algs) != 2 * SHARED_SECRET_MAX); + memset(&p->algs, 0, sizeof(p->algs)); err = drbd_recv_all(peer_device->connection, p, header_size); if (err) @@ -3950,7 +3897,6 @@ static int receive_SyncParam(struct drbd_connection *connection, struct packet_i drbd_err(device, "verify-alg of wrong size, " "peer wants %u, accepting only up to %u byte\n", data_size, SHARED_SECRET_MAX); - err = -EIO; goto reconnect; } @@ -4168,8 +4114,7 @@ static int receive_sizes(struct drbd_connection *connection, struct packet_info rcu_assign_pointer(device->ldev->disk_conf, new_disk_conf); mutex_unlock(&connection->resource->conf_update); - synchronize_rcu(); - kfree(old_disk_conf); + kvfree_rcu(old_disk_conf); drbd_info(device, "Peer sets u_size to %lu sectors (old: %lu)\n", (unsigned long)p_usize, (unsigned long)my_usize); @@ -5002,7 +4947,7 @@ static int receive_rs_deallocated(struct drbd_connection *connection, struct pac if (get_ldev(device)) { struct drbd_peer_request *peer_req; - const int op = REQ_OP_WRITE_ZEROES; + const enum req_op op = REQ_OP_WRITE_ZEROES; peer_req = drbd_alloc_peer_req(peer_device, ID_SYNCER, sector, size, 0, GFP_NOIO); @@ -5020,7 +4965,8 @@ static int receive_rs_deallocated(struct drbd_connection *connection, struct pac spin_unlock_irq(&device->resource->req_lock); atomic_add(pi->size >> 9, &device->rs_sect_ev); - err = drbd_submit_peer_request(device, peer_req, op, 0, DRBD_FAULT_RS_WR); + err = drbd_submit_peer_request(device, peer_req, op, + DRBD_FAULT_RS_WR); if (err) { spin_lock_irq(&device->resource->req_lock); @@ -5083,7 +5029,6 @@ static struct data_cmd drbd_cmd_handler[] = { [P_TRIM] = { 0, sizeof(struct p_trim), receive_Data }, [P_ZEROES] = { 0, sizeof(struct p_trim), receive_Data }, [P_RS_DEALLOCATED] = { 0, sizeof(struct p_block_desc), receive_rs_deallocated }, - [P_WSAME] = { 1, sizeof(struct p_wsame), receive_Data }, }; static void drbdd(struct drbd_connection *connection) |