diff options
author | Linus Torvalds | 2019-08-23 10:53:34 -0700 |
---|---|---|
committer | Linus Torvalds | 2019-08-23 10:53:34 -0700 |
commit | dd469a456047af5eb1ee0bcfc8fe61f5940ef0e0 (patch) | |
tree | f97e9459a1d048cc570cf17d05f578bc09a7d623 | |
parent | f576518c9ab5a6fbc7a4b9bbfc9be31aa18a1cc7 (diff) | |
parent | 1cfd5d3399e87167b7f9157ef99daa0e959f395d (diff) |
Merge tag 'for-5.3/dm-fixes-2' of git://git.kernel.org/pub/scm/linux/kernel/git/device-mapper/linux-dm
Pull device mapper fixes from Mike Snitzer:
- Revert a DM bufio change from during the 5.3 merge window now that a
proper fix has been made to the block loopback driver.
- Fix DM kcopyd to wakeup so failed subjobs get completed.
- Various fixes to DM zoned target to address error handling, and other
small tweaks (SPDX license identifiers and fix typos).
- Fix DM integrity range locking race by tracking whether journal has
changed.
- Fix DM dust target to detect reads of badblocks beyond the first 512b
sector (applicable if blocksize is larger than 512b).
- Fix DM persistent-data issue in both the DM btree and DM
space-map-metadata interfaces.
- Fix out of bounds memory access with certain DM table configurations.
* tag 'for-5.3/dm-fixes-2' of git://git.kernel.org/pub/scm/linux/kernel/git/device-mapper/linux-dm:
dm table: fix invalid memory accesses with too high sector number
dm space map metadata: fix missing store of apply_bops() return value
dm btree: fix order of block initialization in btree_split_beneath
dm raid: add missing cleanup in raid_ctr()
dm zoned: fix potential NULL dereference in dmz_do_reclaim()
dm dust: use dust block size for badblocklist index
dm integrity: fix a crash due to BUG_ON in __journal_read_write()
dm zoned: fix a few typos
dm zoned: add SPDX license identifiers
dm zoned: properly handle backing device failure
dm zoned: improve error handling in i/o map code
dm zoned: improve error handling in reclaim
dm kcopyd: always complete failed jobs
Revert "dm bufio: fix deadlock with loop device"
-rw-r--r-- | drivers/md/dm-bufio.c | 4 | ||||
-rw-r--r-- | drivers/md/dm-dust.c | 11 | ||||
-rw-r--r-- | drivers/md/dm-integrity.c | 15 | ||||
-rw-r--r-- | drivers/md/dm-kcopyd.c | 5 | ||||
-rw-r--r-- | drivers/md/dm-raid.c | 2 | ||||
-rw-r--r-- | drivers/md/dm-table.c | 5 | ||||
-rw-r--r-- | drivers/md/dm-zoned-metadata.c | 68 | ||||
-rw-r--r-- | drivers/md/dm-zoned-reclaim.c | 47 | ||||
-rw-r--r-- | drivers/md/dm-zoned-target.c | 68 | ||||
-rw-r--r-- | drivers/md/dm-zoned.h | 11 | ||||
-rw-r--r-- | drivers/md/persistent-data/dm-btree.c | 31 | ||||
-rw-r--r-- | drivers/md/persistent-data/dm-space-map-metadata.c | 2 |
12 files changed, 209 insertions, 60 deletions
diff --git a/drivers/md/dm-bufio.c b/drivers/md/dm-bufio.c index b6b5acc92ca2..2a48ea3f1b30 100644 --- a/drivers/md/dm-bufio.c +++ b/drivers/md/dm-bufio.c @@ -1599,7 +1599,9 @@ dm_bufio_shrink_scan(struct shrinker *shrink, struct shrink_control *sc) unsigned long freed; c = container_of(shrink, struct dm_bufio_client, shrinker); - if (!dm_bufio_trylock(c)) + if (sc->gfp_mask & __GFP_FS) + dm_bufio_lock(c); + else if (!dm_bufio_trylock(c)) return SHRINK_STOP; freed = __scan(c, sc->nr_to_scan, sc->gfp_mask); diff --git a/drivers/md/dm-dust.c b/drivers/md/dm-dust.c index 845f376a72d9..8288887b7f94 100644 --- a/drivers/md/dm-dust.c +++ b/drivers/md/dm-dust.c @@ -25,6 +25,7 @@ struct dust_device { unsigned long long badblock_count; spinlock_t dust_lock; unsigned int blksz; + int sect_per_block_shift; unsigned int sect_per_block; sector_t start; bool fail_read_on_bb:1; @@ -79,7 +80,7 @@ static int dust_remove_block(struct dust_device *dd, unsigned long long block) unsigned long flags; spin_lock_irqsave(&dd->dust_lock, flags); - bblock = dust_rb_search(&dd->badblocklist, block * dd->sect_per_block); + bblock = dust_rb_search(&dd->badblocklist, block); if (bblock == NULL) { if (!dd->quiet_mode) { @@ -113,7 +114,7 @@ static int dust_add_block(struct dust_device *dd, unsigned long long block) } spin_lock_irqsave(&dd->dust_lock, flags); - bblock->bb = block * dd->sect_per_block; + bblock->bb = block; if (!dust_rb_insert(&dd->badblocklist, bblock)) { if (!dd->quiet_mode) { DMERR("%s: block %llu already in badblocklist", @@ -138,7 +139,7 @@ static int dust_query_block(struct dust_device *dd, unsigned long long block) unsigned long flags; spin_lock_irqsave(&dd->dust_lock, flags); - bblock = dust_rb_search(&dd->badblocklist, block * dd->sect_per_block); + bblock = dust_rb_search(&dd->badblocklist, block); if (bblock != NULL) DMINFO("%s: block %llu found in badblocklist", __func__, block); else @@ -165,6 +166,7 @@ static int dust_map_read(struct dust_device *dd, sector_t thisblock, int ret = DM_MAPIO_REMAPPED; if (fail_read_on_bb) { + thisblock >>= dd->sect_per_block_shift; spin_lock_irqsave(&dd->dust_lock, flags); ret = __dust_map_read(dd, thisblock); spin_unlock_irqrestore(&dd->dust_lock, flags); @@ -195,6 +197,7 @@ static int dust_map_write(struct dust_device *dd, sector_t thisblock, unsigned long flags; if (fail_read_on_bb) { + thisblock >>= dd->sect_per_block_shift; spin_lock_irqsave(&dd->dust_lock, flags); __dust_map_write(dd, thisblock); spin_unlock_irqrestore(&dd->dust_lock, flags); @@ -331,6 +334,8 @@ static int dust_ctr(struct dm_target *ti, unsigned int argc, char **argv) dd->blksz = blksz; dd->start = tmp; + dd->sect_per_block_shift = __ffs(sect_per_block); + /* * Whether to fail a read on a "bad" block. * Defaults to false; enabled later by message. diff --git a/drivers/md/dm-integrity.c b/drivers/md/dm-integrity.c index b1b0de402dfc..9118ab85cb3a 100644 --- a/drivers/md/dm-integrity.c +++ b/drivers/md/dm-integrity.c @@ -1943,7 +1943,22 @@ offload_to_thread: queue_work(ic->wait_wq, &dio->work); return; } + if (journal_read_pos != NOT_FOUND) + dio->range.n_sectors = ic->sectors_per_block; wait_and_add_new_range(ic, &dio->range); + /* + * wait_and_add_new_range drops the spinlock, so the journal + * may have been changed arbitrarily. We need to recheck. + * To simplify the code, we restrict I/O size to just one block. + */ + if (journal_read_pos != NOT_FOUND) { + sector_t next_sector; + unsigned new_pos = find_journal_node(ic, dio->range.logical_sector, &next_sector); + if (unlikely(new_pos != journal_read_pos)) { + remove_range_unlocked(ic, &dio->range); + goto retry; + } + } } spin_unlock_irq(&ic->endio_wait.lock); diff --git a/drivers/md/dm-kcopyd.c b/drivers/md/dm-kcopyd.c index df2011de7be2..1bbe4a34ef4c 100644 --- a/drivers/md/dm-kcopyd.c +++ b/drivers/md/dm-kcopyd.c @@ -566,8 +566,10 @@ static int run_io_job(struct kcopyd_job *job) * no point in continuing. */ if (test_bit(DM_KCOPYD_WRITE_SEQ, &job->flags) && - job->master_job->write_err) + job->master_job->write_err) { + job->write_err = job->master_job->write_err; return -EIO; + } io_job_start(job->kc->throttle); @@ -619,6 +621,7 @@ static int process_jobs(struct list_head *jobs, struct dm_kcopyd_client *kc, else job->read_err = 1; push(&kc->complete_jobs, job); + wake(kc); break; } diff --git a/drivers/md/dm-raid.c b/drivers/md/dm-raid.c index 8a60a4a070ac..1f933dd197cd 100644 --- a/drivers/md/dm-raid.c +++ b/drivers/md/dm-raid.c @@ -3194,7 +3194,7 @@ static int raid_ctr(struct dm_target *ti, unsigned int argc, char **argv) */ r = rs_prepare_reshape(rs); if (r) - return r; + goto bad; /* Reshaping ain't recovery, so disable recovery */ rs_setup_recovery(rs, MaxSector); diff --git a/drivers/md/dm-table.c b/drivers/md/dm-table.c index 7b6c3ee9e755..8820931ec7d2 100644 --- a/drivers/md/dm-table.c +++ b/drivers/md/dm-table.c @@ -1342,7 +1342,7 @@ void dm_table_event(struct dm_table *t) } EXPORT_SYMBOL(dm_table_event); -sector_t dm_table_get_size(struct dm_table *t) +inline sector_t dm_table_get_size(struct dm_table *t) { return t->num_targets ? (t->highs[t->num_targets - 1] + 1) : 0; } @@ -1367,6 +1367,9 @@ struct dm_target *dm_table_find_target(struct dm_table *t, sector_t sector) unsigned int l, n = 0, k = 0; sector_t *node; + if (unlikely(sector >= dm_table_get_size(t))) + return &t->targets[t->num_targets]; + for (l = 0; l < t->depth; l++) { n = get_child(n, k); node = get_node(t, l, n); diff --git a/drivers/md/dm-zoned-metadata.c b/drivers/md/dm-zoned-metadata.c index 8545dcee9fd0..595a73110e17 100644 --- a/drivers/md/dm-zoned-metadata.c +++ b/drivers/md/dm-zoned-metadata.c @@ -1,3 +1,4 @@ +// SPDX-License-Identifier: GPL-2.0-only /* * Copyright (C) 2017 Western Digital Corporation or its affiliates. * @@ -34,7 +35,7 @@ * (1) Super block (1 block) * (2) Chunk mapping table (nr_map_blocks) * (3) Bitmap blocks (nr_bitmap_blocks) - * All metadata blocks are stored in conventional zones, starting from the + * All metadata blocks are stored in conventional zones, starting from * the first conventional zone found on disk. */ struct dmz_super { @@ -233,7 +234,7 @@ void dmz_unlock_map(struct dmz_metadata *zmd) * Lock/unlock metadata access. This is a "read" lock on a semaphore * that prevents metadata flush from running while metadata are being * modified. The actual metadata write mutual exclusion is achieved with - * the map lock and zone styate management (active and reclaim state are + * the map lock and zone state management (active and reclaim state are * mutually exclusive). */ void dmz_lock_metadata(struct dmz_metadata *zmd) @@ -402,15 +403,18 @@ static struct dmz_mblock *dmz_get_mblock_slow(struct dmz_metadata *zmd, sector_t block = zmd->sb[zmd->mblk_primary].block + mblk_no; struct bio *bio; + if (dmz_bdev_is_dying(zmd->dev)) + return ERR_PTR(-EIO); + /* Get a new block and a BIO to read it */ mblk = dmz_alloc_mblock(zmd, mblk_no); if (!mblk) - return NULL; + return ERR_PTR(-ENOMEM); bio = bio_alloc(GFP_NOIO, 1); if (!bio) { dmz_free_mblock(zmd, mblk); - return NULL; + return ERR_PTR(-ENOMEM); } spin_lock(&zmd->mblk_lock); @@ -541,8 +545,8 @@ static struct dmz_mblock *dmz_get_mblock(struct dmz_metadata *zmd, if (!mblk) { /* Cache miss: read the block from disk */ mblk = dmz_get_mblock_slow(zmd, mblk_no); - if (!mblk) - return ERR_PTR(-ENOMEM); + if (IS_ERR(mblk)) + return mblk; } /* Wait for on-going read I/O and check for error */ @@ -570,16 +574,19 @@ static void dmz_dirty_mblock(struct dmz_metadata *zmd, struct dmz_mblock *mblk) /* * Issue a metadata block write BIO. */ -static void dmz_write_mblock(struct dmz_metadata *zmd, struct dmz_mblock *mblk, - unsigned int set) +static int dmz_write_mblock(struct dmz_metadata *zmd, struct dmz_mblock *mblk, + unsigned int set) { sector_t block = zmd->sb[set].block + mblk->no; struct bio *bio; + if (dmz_bdev_is_dying(zmd->dev)) + return -EIO; + bio = bio_alloc(GFP_NOIO, 1); if (!bio) { set_bit(DMZ_META_ERROR, &mblk->state); - return; + return -ENOMEM; } set_bit(DMZ_META_WRITING, &mblk->state); @@ -591,6 +598,8 @@ static void dmz_write_mblock(struct dmz_metadata *zmd, struct dmz_mblock *mblk, bio_set_op_attrs(bio, REQ_OP_WRITE, REQ_META | REQ_PRIO); bio_add_page(bio, mblk->page, DMZ_BLOCK_SIZE, 0); submit_bio(bio); + + return 0; } /* @@ -602,6 +611,9 @@ static int dmz_rdwr_block(struct dmz_metadata *zmd, int op, sector_t block, struct bio *bio; int ret; + if (dmz_bdev_is_dying(zmd->dev)) + return -EIO; + bio = bio_alloc(GFP_NOIO, 1); if (!bio) return -ENOMEM; @@ -659,22 +671,29 @@ static int dmz_write_dirty_mblocks(struct dmz_metadata *zmd, { struct dmz_mblock *mblk; struct blk_plug plug; - int ret = 0; + int ret = 0, nr_mblks_submitted = 0; /* Issue writes */ blk_start_plug(&plug); - list_for_each_entry(mblk, write_list, link) - dmz_write_mblock(zmd, mblk, set); + list_for_each_entry(mblk, write_list, link) { + ret = dmz_write_mblock(zmd, mblk, set); + if (ret) + break; + nr_mblks_submitted++; + } blk_finish_plug(&plug); /* Wait for completion */ list_for_each_entry(mblk, write_list, link) { + if (!nr_mblks_submitted) + break; wait_on_bit_io(&mblk->state, DMZ_META_WRITING, TASK_UNINTERRUPTIBLE); if (test_bit(DMZ_META_ERROR, &mblk->state)) { clear_bit(DMZ_META_ERROR, &mblk->state); ret = -EIO; } + nr_mblks_submitted--; } /* Flush drive cache (this will also sync data) */ @@ -736,6 +755,11 @@ int dmz_flush_metadata(struct dmz_metadata *zmd) */ dmz_lock_flush(zmd); + if (dmz_bdev_is_dying(zmd->dev)) { + ret = -EIO; + goto out; + } + /* Get dirty blocks */ spin_lock(&zmd->mblk_lock); list_splice_init(&zmd->mblk_dirty_list, &write_list); @@ -1542,7 +1566,7 @@ static struct dm_zone *dmz_get_rnd_zone_for_reclaim(struct dmz_metadata *zmd) struct dm_zone *zone; if (list_empty(&zmd->map_rnd_list)) - return NULL; + return ERR_PTR(-EBUSY); list_for_each_entry(zone, &zmd->map_rnd_list, link) { if (dmz_is_buf(zone)) @@ -1553,7 +1577,7 @@ static struct dm_zone *dmz_get_rnd_zone_for_reclaim(struct dmz_metadata *zmd) return dzone; } - return NULL; + return ERR_PTR(-EBUSY); } /* @@ -1564,7 +1588,7 @@ static struct dm_zone *dmz_get_seq_zone_for_reclaim(struct dmz_metadata *zmd) struct dm_zone *zone; if (list_empty(&zmd->map_seq_list)) - return NULL; + return ERR_PTR(-EBUSY); list_for_each_entry(zone, &zmd->map_seq_list, link) { if (!zone->bzone) @@ -1573,7 +1597,7 @@ static struct dm_zone *dmz_get_seq_zone_for_reclaim(struct dmz_metadata *zmd) return zone; } - return NULL; + return ERR_PTR(-EBUSY); } /* @@ -1628,9 +1652,13 @@ again: if (op != REQ_OP_WRITE) goto out; - /* Alloate a random zone */ + /* Allocate a random zone */ dzone = dmz_alloc_zone(zmd, DMZ_ALLOC_RND); if (!dzone) { + if (dmz_bdev_is_dying(zmd->dev)) { + dzone = ERR_PTR(-EIO); + goto out; + } dmz_wait_for_free_zones(zmd); goto again; } @@ -1725,9 +1753,13 @@ again: if (bzone) goto out; - /* Alloate a random zone */ + /* Allocate a random zone */ bzone = dmz_alloc_zone(zmd, DMZ_ALLOC_RND); if (!bzone) { + if (dmz_bdev_is_dying(zmd->dev)) { + bzone = ERR_PTR(-EIO); + goto out; + } dmz_wait_for_free_zones(zmd); goto again; } diff --git a/drivers/md/dm-zoned-reclaim.c b/drivers/md/dm-zoned-reclaim.c index edf4b95eb075..d240d7ca8a8a 100644 --- a/drivers/md/dm-zoned-reclaim.c +++ b/drivers/md/dm-zoned-reclaim.c @@ -1,3 +1,4 @@ +// SPDX-License-Identifier: GPL-2.0-only /* * Copyright (C) 2017 Western Digital Corporation or its affiliates. * @@ -37,7 +38,7 @@ enum { /* * Number of seconds of target BIO inactivity to consider the target idle. */ -#define DMZ_IDLE_PERIOD (10UL * HZ) +#define DMZ_IDLE_PERIOD (10UL * HZ) /* * Percentage of unmapped (free) random zones below which reclaim starts @@ -134,6 +135,9 @@ static int dmz_reclaim_copy(struct dmz_reclaim *zrc, set_bit(DM_KCOPYD_WRITE_SEQ, &flags); while (block < end_block) { + if (dev->flags & DMZ_BDEV_DYING) + return -EIO; + /* Get a valid region from the source zone */ ret = dmz_first_valid_block(zmd, src_zone, &block); if (ret <= 0) @@ -215,7 +219,7 @@ static int dmz_reclaim_buf(struct dmz_reclaim *zrc, struct dm_zone *dzone) dmz_unlock_flush(zmd); - return 0; + return ret; } /* @@ -259,7 +263,7 @@ static int dmz_reclaim_seq_data(struct dmz_reclaim *zrc, struct dm_zone *dzone) dmz_unlock_flush(zmd); - return 0; + return ret; } /* @@ -312,7 +316,7 @@ static int dmz_reclaim_rnd_data(struct dmz_reclaim *zrc, struct dm_zone *dzone) dmz_unlock_flush(zmd); - return 0; + return ret; } /* @@ -334,7 +338,7 @@ static void dmz_reclaim_empty(struct dmz_reclaim *zrc, struct dm_zone *dzone) /* * Find a candidate zone for reclaim and process it. */ -static void dmz_reclaim(struct dmz_reclaim *zrc) +static int dmz_do_reclaim(struct dmz_reclaim *zrc) { struct dmz_metadata *zmd = zrc->metadata; struct dm_zone *dzone; @@ -344,8 +348,8 @@ static void dmz_reclaim(struct dmz_reclaim *zrc) /* Get a data zone */ dzone = dmz_get_zone_for_reclaim(zmd); - if (!dzone) - return; + if (IS_ERR(dzone)) + return PTR_ERR(dzone); start = jiffies; @@ -391,13 +395,20 @@ static void dmz_reclaim(struct dmz_reclaim *zrc) out: if (ret) { dmz_unlock_zone_reclaim(dzone); - return; + return ret; } - (void) dmz_flush_metadata(zrc->metadata); + ret = dmz_flush_metadata(zrc->metadata); + if (ret) { + dmz_dev_debug(zrc->dev, + "Metadata flush for zone %u failed, err %d\n", + dmz_id(zmd, rzone), ret); + return ret; + } dmz_dev_debug(zrc->dev, "Reclaimed zone %u in %u ms", dmz_id(zmd, rzone), jiffies_to_msecs(jiffies - start)); + return 0; } /* @@ -427,7 +438,7 @@ static bool dmz_should_reclaim(struct dmz_reclaim *zrc) return false; /* - * If the percentage of unmappped random zones is low, + * If the percentage of unmapped random zones is low, * reclaim even if the target is busy. */ return p_unmap_rnd <= DMZ_RECLAIM_LOW_UNMAP_RND; @@ -442,6 +453,10 @@ static void dmz_reclaim_work(struct work_struct *work) struct dmz_metadata *zmd = zrc->metadata; unsigned int nr_rnd, nr_unmap_rnd; unsigned int p_unmap_rnd; + int ret; + + if (dmz_bdev_is_dying(zrc->dev)) + return; if (!dmz_should_reclaim(zrc)) { mod_delayed_work(zrc->wq, &zrc->work, DMZ_IDLE_PERIOD); @@ -471,7 +486,17 @@ static void dmz_reclaim_work(struct work_struct *work) (dmz_target_idle(zrc) ? "Idle" : "Busy"), p_unmap_rnd, nr_unmap_rnd, nr_rnd); - dmz_reclaim(zrc); + ret = dmz_do_reclaim(zrc); + if (ret) { + dmz_dev_debug(zrc->dev, "Reclaim error %d\n", ret); + if (ret == -EIO) + /* + * LLD might be performing some error handling sequence + * at the underlying device. To not interfere, do not + * attempt to schedule the next reclaim run immediately. + */ + return; + } dmz_schedule_reclaim(zrc); } diff --git a/drivers/md/dm-zoned-target.c b/drivers/md/dm-zoned-target.c index 51d029bbb740..31478fef6032 100644 --- a/drivers/md/dm-zoned-target.c +++ b/drivers/md/dm-zoned-target.c @@ -1,3 +1,4 @@ +// SPDX-License-Identifier: GPL-2.0-only /* * Copyright (C) 2017 Western Digital Corporation or its affiliates. * @@ -133,6 +134,8 @@ static int dmz_submit_bio(struct dmz_target *dmz, struct dm_zone *zone, refcount_inc(&bioctx->ref); generic_make_request(clone); + if (clone->bi_status == BLK_STS_IOERR) + return -EIO; if (bio_op(bio) == REQ_OP_WRITE && dmz_is_seq(zone)) zone->wp_block += nr_blocks; @@ -277,8 +280,8 @@ static int dmz_handle_buffered_write(struct dmz_target *dmz, /* Get the buffer zone. One will be allocated if needed */ bzone = dmz_get_chunk_buffer(zmd, zone); - if (!bzone) - return -ENOSPC; + if (IS_ERR(bzone)) + return PTR_ERR(bzone); if (dmz_is_readonly(bzone)) return -EROFS; @@ -389,6 +392,11 @@ static void dmz_handle_bio(struct dmz_target *dmz, struct dm_chunk_work *cw, dmz_lock_metadata(zmd); + if (dmz->dev->flags & DMZ_BDEV_DYING) { + ret = -EIO; + goto out; + } + /* * Get the data zone mapping the chunk. There may be no * mapping for read and discard. If a mapping is obtained, @@ -493,6 +501,8 @@ static void dmz_flush_work(struct work_struct *work) /* Flush dirty metadata blocks */ ret = dmz_flush_metadata(dmz->metadata); + if (ret) + dmz_dev_debug(dmz->dev, "Metadata flush failed, rc=%d\n", ret); /* Process queued flush requests */ while (1) { @@ -513,22 +523,24 @@ static void dmz_flush_work(struct work_struct *work) * Get a chunk work and start it to process a new BIO. * If the BIO chunk has no work yet, create one. */ -static void dmz_queue_chunk_work(struct dmz_target *dmz, struct bio *bio) +static int dmz_queue_chunk_work(struct dmz_target *dmz, struct bio *bio) { unsigned int chunk = dmz_bio_chunk(dmz->dev, bio); struct dm_chunk_work *cw; + int ret = 0; mutex_lock(&dmz->chunk_lock); /* Get the BIO chunk work. If one is not active yet, create one */ cw = radix_tree_lookup(&dmz->chunk_rxtree, chunk); if (!cw) { - int ret; /* Create a new chunk work */ cw = kmalloc(sizeof(struct dm_chunk_work), GFP_NOIO); - if (!cw) + if (unlikely(!cw)) { + ret = -ENOMEM; goto out; + } INIT_WORK(&cw->work, dmz_chunk_work); refcount_set(&cw->refcount, 0); @@ -539,7 +551,6 @@ static void dmz_queue_chunk_work(struct dmz_target *dmz, struct bio *bio) ret = radix_tree_insert(&dmz->chunk_rxtree, chunk, cw); if (unlikely(ret)) { kfree(cw); - cw = NULL; goto out; } } @@ -547,10 +558,38 @@ static void dmz_queue_chunk_work(struct dmz_target *dmz, struct bio *bio) bio_list_add(&cw->bio_list, bio); dmz_get_chunk_work(cw); + dmz_reclaim_bio_acc(dmz->reclaim); if (queue_work(dmz->chunk_wq, &cw->work)) dmz_get_chunk_work(cw); out: mutex_unlock(&dmz->chunk_lock); + return ret; +} + +/* + * Check the backing device availability. If it's on the way out, + * start failing I/O. Reclaim and metadata components also call this + * function to cleanly abort operation in the event of such failure. + */ +bool dmz_bdev_is_dying(struct dmz_dev *dmz_dev) +{ + struct gendisk *disk; + + if (!(dmz_dev->flags & DMZ_BDEV_DYING)) { + disk = dmz_dev->bdev->bd_disk; + if (blk_queue_dying(bdev_get_queue(dmz_dev->bdev))) { + dmz_dev_warn(dmz_dev, "Backing device queue dying"); + dmz_dev->flags |= DMZ_BDEV_DYING; + } else if (disk->fops->check_events) { + if (disk->fops->check_events(disk, 0) & + DISK_EVENT_MEDIA_CHANGE) { + dmz_dev_warn(dmz_dev, "Backing device offline"); + dmz_dev->flags |= DMZ_BDEV_DYING; + } + } + } + + return dmz_dev->flags & DMZ_BDEV_DYING; } /* @@ -564,6 +603,10 @@ static int dmz_map(struct dm_target *ti, struct bio *bio) sector_t sector = bio->bi_iter.bi_sector; unsigned int nr_sectors = bio_sectors(bio); sector_t chunk_sector; + int ret; + + if (dmz_bdev_is_dying(dmz->dev)) + return DM_MAPIO_KILL; dmz_dev_debug(dev, "BIO op %d sector %llu + %u => chunk %llu, block %llu, %u blocks", bio_op(bio), (unsigned long long)sector, nr_sectors, @@ -601,8 +644,14 @@ static int dmz_map(struct dm_target *ti, struct bio *bio) dm_accept_partial_bio(bio, dev->zone_nr_sectors - chunk_sector); /* Now ready to handle this BIO */ - dmz_reclaim_bio_acc(dmz->reclaim); - dmz_queue_chunk_work(dmz, bio); + ret = dmz_queue_chunk_work(dmz, bio); + if (ret) { + dmz_dev_debug(dmz->dev, + "BIO op %d, can't process chunk %llu, err %i\n", + bio_op(bio), (u64)dmz_bio_chunk(dmz->dev, bio), + ret); + return DM_MAPIO_REQUEUE; + } return DM_MAPIO_SUBMITTED; } @@ -855,6 +904,9 @@ static int dmz_prepare_ioctl(struct dm_target *ti, struct block_device **bdev) { struct dmz_target *dmz = ti->private; + if (dmz_bdev_is_dying(dmz->dev)) + return -ENODEV; + *bdev = dmz->dev->bdev; return 0; diff --git a/drivers/md/dm-zoned.h b/drivers/md/dm-zoned.h index ed8de49c9a08..d8e70b0ade35 100644 --- a/drivers/md/dm-zoned.h +++ b/drivers/md/dm-zoned.h @@ -1,3 +1,4 @@ +/* SPDX-License-Identifier: GPL-2.0 */ /* * Copyright (C) 2017 Western Digital Corporation or its affiliates. * @@ -56,6 +57,8 @@ struct dmz_dev { unsigned int nr_zones; + unsigned int flags; + sector_t zone_nr_sectors; unsigned int zone_nr_sectors_shift; @@ -67,6 +70,9 @@ struct dmz_dev { (dev)->zone_nr_sectors_shift) #define dmz_chunk_block(dev, b) ((b) & ((dev)->zone_nr_blocks - 1)) +/* Device flags. */ +#define DMZ_BDEV_DYING (1 << 0) + /* * Zone descriptor. */ @@ -245,4 +251,9 @@ void dmz_resume_reclaim(struct dmz_reclaim *zrc); void dmz_reclaim_bio_acc(struct dmz_reclaim *zrc); void dmz_schedule_reclaim(struct dmz_reclaim *zrc); +/* + * Functions defined in dm-zoned-target.c + */ +bool dmz_bdev_is_dying(struct dmz_dev *dmz_dev); + #endif /* DM_ZONED_H */ diff --git a/drivers/md/persistent-data/dm-btree.c b/drivers/md/persistent-data/dm-btree.c index 58b319757b1e..8aae0624a297 100644 --- a/drivers/md/persistent-data/dm-btree.c +++ b/drivers/md/persistent-data/dm-btree.c @@ -628,39 +628,40 @@ static int btree_split_beneath(struct shadow_spine *s, uint64_t key) new_parent = shadow_current(s); + pn = dm_block_data(new_parent); + size = le32_to_cpu(pn->header.flags) & INTERNAL_NODE ? + sizeof(__le64) : s->info->value_type.size; + + /* create & init the left block */ r = new_block(s->info, &left); if (r < 0) return r; + ln = dm_block_data(left); + nr_left = le32_to_cpu(pn->header.nr_entries) / 2; + + ln->header.flags = pn->header.flags; + ln->header.nr_entries = cpu_to_le32(nr_left); + ln->header.max_entries = pn->header.max_entries; + ln->header.value_size = pn->header.value_size; + memcpy(ln->keys, pn->keys, nr_left * sizeof(pn->keys[0])); + memcpy(value_ptr(ln, 0), value_ptr(pn, 0), nr_left * size); + + /* create & init the right block */ r = new_block(s->info, &right); if (r < 0) { unlock_block(s->info, left); return r; } - pn = dm_block_data(new_parent); - ln = dm_block_data(left); rn = dm_block_data(right); - - nr_left = le32_to_cpu(pn->header.nr_entries) / 2; nr_right = le32_to_cpu(pn->header.nr_entries) - nr_left; - ln->header.flags = pn->header.flags; - ln->header.nr_entries = cpu_to_le32(nr_left); - ln->header.max_entries = pn->header.max_entries; - ln->header.value_size = pn->header.value_size; - rn->header.flags = pn->header.flags; rn->header.nr_entries = cpu_to_le32(nr_right); rn->header.max_entries = pn->header.max_entries; rn->header.value_size = pn->header.value_size; - - memcpy(ln->keys, pn->keys, nr_left * sizeof(pn->keys[0])); memcpy(rn->keys, pn->keys + nr_left, nr_right * sizeof(pn->keys[0])); - - size = le32_to_cpu(pn->header.flags) & INTERNAL_NODE ? - sizeof(__le64) : s->info->value_type.size; - memcpy(value_ptr(ln, 0), value_ptr(pn, 0), nr_left * size); memcpy(value_ptr(rn, 0), value_ptr(pn, nr_left), nr_right * size); diff --git a/drivers/md/persistent-data/dm-space-map-metadata.c b/drivers/md/persistent-data/dm-space-map-metadata.c index aec449243966..25328582cc48 100644 --- a/drivers/md/persistent-data/dm-space-map-metadata.c +++ b/drivers/md/persistent-data/dm-space-map-metadata.c @@ -249,7 +249,7 @@ static int out(struct sm_metadata *smm) } if (smm->recursion_count == 1) - apply_bops(smm); + r = apply_bops(smm); smm->recursion_count--; |