diff options
Diffstat (limited to 'drivers/md')
| -rw-r--r-- | drivers/md/Kconfig | 9 | ||||
| -rw-r--r-- | drivers/md/dm-crypt.c | 5 | ||||
| -rw-r--r-- | drivers/md/dm-exception-store.c | 13 | ||||
| -rw-r--r-- | drivers/md/dm-mpath.c | 47 | ||||
| -rw-r--r-- | drivers/md/dm-raid.c | 54 | ||||
| -rw-r--r-- | drivers/md/dm-raid1.c | 9 | ||||
| -rw-r--r-- | drivers/md/dm-region-hash.c | 5 | ||||
| -rw-r--r-- | drivers/md/dm-snap.c | 28 | ||||
| -rw-r--r-- | drivers/md/dm-stripe.c | 83 | ||||
| -rw-r--r-- | drivers/md/dm-thin-metadata.c | 31 | ||||
| -rw-r--r-- | drivers/md/dm-thin-metadata.h | 2 | ||||
| -rw-r--r-- | drivers/md/dm-thin.c | 105 | ||||
| -rw-r--r-- | drivers/md/dm.c | 40 | ||||
| -rw-r--r-- | drivers/md/persistent-data/Makefile | 1 | ||||
| -rw-r--r-- | drivers/md/persistent-data/dm-space-map-checker.c | 446 | ||||
| -rw-r--r-- | drivers/md/persistent-data/dm-space-map-checker.h | 26 | ||||
| -rw-r--r-- | drivers/md/persistent-data/dm-space-map-disk.c | 34 | ||||
| -rw-r--r-- | drivers/md/persistent-data/dm-transaction-manager.c | 29 |
18 files changed, 280 insertions, 687 deletions
diff --git a/drivers/md/Kconfig b/drivers/md/Kconfig index 10f122a3a856..1eee45b69b71 100644 --- a/drivers/md/Kconfig +++ b/drivers/md/Kconfig @@ -260,15 +260,6 @@ config DM_DEBUG_BLOCK_STACK_TRACING If unsure, say N. -config DM_DEBUG_SPACE_MAPS - boolean "Extra validation for thin provisioning space maps" - depends on DM_THIN_PROVISIONING - ---help--- - Enable this for messages that may help debug problems with the - space maps used by thin provisioning. - - If unsure, say N. - config DM_MIRROR tristate "Mirror target" depends on BLK_DEV_DM diff --git a/drivers/md/dm-crypt.c b/drivers/md/dm-crypt.c index 3f06df59fd82..e2b32401ecc7 100644 --- a/drivers/md/dm-crypt.c +++ b/drivers/md/dm-crypt.c @@ -1241,7 +1241,6 @@ static void kcryptd_queue_crypt(struct dm_crypt_io *io) static int crypt_decode_key(u8 *key, char *hex, unsigned int size) { char buffer[3]; - char *endp; unsigned int i; buffer[2] = '\0'; @@ -1250,9 +1249,7 @@ static int crypt_decode_key(u8 *key, char *hex, unsigned int size) buffer[0] = *hex++; buffer[1] = *hex++; - key[i] = (u8)simple_strtoul(buffer, &endp, 16); - - if (endp != &buffer[2]) + if (kstrtou8(buffer, 16, &key[i])) return -EINVAL; } diff --git a/drivers/md/dm-exception-store.c b/drivers/md/dm-exception-store.c index aa70f7d43a1a..ebaa4f803eec 100644 --- a/drivers/md/dm-exception-store.c +++ b/drivers/md/dm-exception-store.c @@ -142,24 +142,19 @@ EXPORT_SYMBOL(dm_exception_store_type_unregister); static int set_chunk_size(struct dm_exception_store *store, const char *chunk_size_arg, char **error) { - unsigned long chunk_size_ulong; - char *value; + unsigned chunk_size; - chunk_size_ulong = simple_strtoul(chunk_size_arg, &value, 10); - if (*chunk_size_arg == '\0' || *value != '\0' || - chunk_size_ulong > UINT_MAX) { + if (kstrtouint(chunk_size_arg, 10, &chunk_size)) { *error = "Invalid chunk size"; return -EINVAL; } - if (!chunk_size_ulong) { + if (!chunk_size) { store->chunk_size = store->chunk_mask = store->chunk_shift = 0; return 0; } - return dm_exception_store_set_chunk_size(store, - (unsigned) chunk_size_ulong, - error); + return dm_exception_store_set_chunk_size(store, chunk_size, error); } int dm_exception_store_set_chunk_size(struct dm_exception_store *store, diff --git a/drivers/md/dm-mpath.c b/drivers/md/dm-mpath.c index 638dae048b4f..8a3b2d53f81b 100644 --- a/drivers/md/dm-mpath.c +++ b/drivers/md/dm-mpath.c @@ -85,6 +85,7 @@ struct multipath { unsigned queue_io:1; /* Must we queue all I/O? */ unsigned queue_if_no_path:1; /* Queue I/O if last path fails? */ unsigned saved_queue_if_no_path:1; /* Saved state during suspension */ + unsigned retain_attached_hw_handler:1; /* If there's already a hw_handler present, don't change it. */ unsigned pg_init_retries; /* Number of times to retry pg_init */ unsigned pg_init_count; /* Number of times pg_init called */ @@ -568,6 +569,8 @@ static struct pgpath *parse_path(struct dm_arg_set *as, struct path_selector *ps int r; struct pgpath *p; struct multipath *m = ti->private; + struct request_queue *q = NULL; + const char *attached_handler_name; /* we need at least a path arg */ if (as->argc < 1) { @@ -586,13 +589,37 @@ static struct pgpath *parse_path(struct dm_arg_set *as, struct path_selector *ps goto bad; } - if (m->hw_handler_name) { - struct request_queue *q = bdev_get_queue(p->path.dev->bdev); + if (m->retain_attached_hw_handler || m->hw_handler_name) + q = bdev_get_queue(p->path.dev->bdev); + + if (m->retain_attached_hw_handler) { + attached_handler_name = scsi_dh_attached_handler_name(q, GFP_KERNEL); + if (attached_handler_name) { + /* + * Reset hw_handler_name to match the attached handler + * and clear any hw_handler_params associated with the + * ignored handler. + * + * NB. This modifies the table line to show the actual + * handler instead of the original table passed in. + */ + kfree(m->hw_handler_name); + m->hw_handler_name = attached_handler_name; + + kfree(m->hw_handler_params); + m->hw_handler_params = NULL; + } + } + if (m->hw_handler_name) { + /* + * Increments scsi_dh reference, even when using an + * already-attached handler. + */ r = scsi_dh_attach(q, m->hw_handler_name); if (r == -EBUSY) { /* - * Already attached to different hw_handler, + * Already attached to different hw_handler: * try to reattach with correct one. */ scsi_dh_detach(q); @@ -760,7 +787,7 @@ static int parse_features(struct dm_arg_set *as, struct multipath *m) const char *arg_name; static struct dm_arg _args[] = { - {0, 5, "invalid number of feature args"}, + {0, 6, "invalid number of feature args"}, {1, 50, "pg_init_retries must be between 1 and 50"}, {0, 60000, "pg_init_delay_msecs must be between 0 and 60000"}, }; @@ -781,6 +808,11 @@ static int parse_features(struct dm_arg_set *as, struct multipath *m) continue; } + if (!strcasecmp(arg_name, "retain_attached_hw_handler")) { + m->retain_attached_hw_handler = 1; + continue; + } + if (!strcasecmp(arg_name, "pg_init_retries") && (argc >= 1)) { r = dm_read_arg(_args + 1, as, &m->pg_init_retries, &ti->error); @@ -1364,13 +1396,16 @@ static int multipath_status(struct dm_target *ti, status_type_t type, else { DMEMIT("%u ", m->queue_if_no_path + (m->pg_init_retries > 0) * 2 + - (m->pg_init_delay_msecs != DM_PG_INIT_DELAY_DEFAULT) * 2); + (m->pg_init_delay_msecs != DM_PG_INIT_DELAY_DEFAULT) * 2 + + m->retain_attached_hw_handler); if (m->queue_if_no_path) DMEMIT("queue_if_no_path "); if (m->pg_init_retries) DMEMIT("pg_init_retries %u ", m->pg_init_retries); if (m->pg_init_delay_msecs != DM_PG_INIT_DELAY_DEFAULT) DMEMIT("pg_init_delay_msecs %u ", m->pg_init_delay_msecs); + if (m->retain_attached_hw_handler) + DMEMIT("retain_attached_hw_handler "); } if (!m->hw_handler_name || type == STATUSTYPE_INFO) @@ -1656,7 +1691,7 @@ out: *---------------------------------------------------------------*/ static struct target_type multipath_target = { .name = "multipath", - .version = {1, 4, 0}, + .version = {1, 5, 0}, .module = THIS_MODULE, .ctr = multipath_ctr, .dtr = multipath_dtr, diff --git a/drivers/md/dm-raid.c b/drivers/md/dm-raid.c index 017c34d78d61..f4275a8e860c 100644 --- a/drivers/md/dm-raid.c +++ b/drivers/md/dm-raid.c @@ -101,20 +101,12 @@ static struct raid_set *context_alloc(struct dm_target *ti, struct raid_type *ra { unsigned i; struct raid_set *rs; - sector_t sectors_per_dev; if (raid_devs <= raid_type->parity_devs) { ti->error = "Insufficient number of devices"; return ERR_PTR(-EINVAL); } - sectors_per_dev = ti->len; - if ((raid_type->level > 1) && - sector_div(sectors_per_dev, (raid_devs - raid_type->parity_devs))) { - ti->error = "Target length not divisible by number of data devices"; - return ERR_PTR(-EINVAL); - } - rs = kzalloc(sizeof(*rs) + raid_devs * sizeof(rs->dev[0]), GFP_KERNEL); if (!rs) { ti->error = "Cannot allocate raid context"; @@ -128,7 +120,6 @@ static struct raid_set *context_alloc(struct dm_target *ti, struct raid_type *ra rs->md.raid_disks = raid_devs; rs->md.level = raid_type->level; rs->md.new_level = rs->md.level; - rs->md.dev_sectors = sectors_per_dev; rs->md.layout = raid_type->algorithm; rs->md.new_layout = rs->md.layout; rs->md.delta_disks = 0; @@ -143,6 +134,7 @@ static struct raid_set *context_alloc(struct dm_target *ti, struct raid_type *ra * rs->md.external * rs->md.chunk_sectors * rs->md.new_chunk_sectors + * rs->md.dev_sectors */ return rs; @@ -353,6 +345,8 @@ static int parse_raid_params(struct raid_set *rs, char **argv, { unsigned i, rebuild_cnt = 0; unsigned long value, region_size = 0; + sector_t sectors_per_dev = rs->ti->len; + sector_t max_io_len; char *key; /* @@ -429,13 +423,28 @@ static int parse_raid_params(struct raid_set *rs, char **argv, if (!strcasecmp(key, "rebuild")) { rebuild_cnt++; - if (((rs->raid_type->level != 1) && - (rebuild_cnt > rs->raid_type->parity_devs)) || - ((rs->raid_type->level == 1) && - (rebuild_cnt > (rs->md.raid_disks - 1)))) { - rs->ti->error = "Too many rebuild devices specified for given RAID type"; + + switch (rs->raid_type->level) { + case 1: + if (rebuild_cnt >= rs->md.raid_disks) { + rs->ti->error = "Too many rebuild devices specified"; + return -EINVAL; + } + break; + case 4: + case 5: + case 6: + if (rebuild_cnt > rs->raid_type->parity_devs) { + rs->ti->error = "Too many rebuild devices specified for given RAID type"; + return -EINVAL; + } + break; + default: + DMERR("The rebuild parameter is not supported for %s", rs->raid_type->name); + rs->ti->error = "Rebuild not supported for this RAID type"; return -EINVAL; } + if (value > rs->md.raid_disks) { rs->ti->error = "Invalid rebuild index given"; return -EINVAL; @@ -522,14 +531,19 @@ static int parse_raid_params(struct raid_set *rs, char **argv, return -EINVAL; if (rs->md.chunk_sectors) - rs->ti->split_io = rs->md.chunk_sectors; + max_io_len = rs->md.chunk_sectors; else - rs->ti->split_io = region_size; + max_io_len = region_size; - if (rs->md.chunk_sectors) - rs->ti->split_io = rs->md.chunk_sectors; - else - rs->ti->split_io = region_size; + if (dm_set_target_max_io_len(rs->ti, max_io_len)) + return -EINVAL; + + if ((rs->raid_type->level > 1) && + sector_div(sectors_per_dev, (rs->md.raid_disks - rs->raid_type->parity_devs))) { + rs->ti->error = "Target length not divisible by number of data devices"; + return -EINVAL; + } + rs->md.dev_sectors = sectors_per_dev; /* Assume there are no metadata devices until the drives are parsed */ rs->md.persistent = 0; diff --git a/drivers/md/dm-raid1.c b/drivers/md/dm-raid1.c index d039de8322f0..819ccba65912 100644 --- a/drivers/md/dm-raid1.c +++ b/drivers/md/dm-raid1.c @@ -1081,9 +1081,14 @@ static int mirror_ctr(struct dm_target *ti, unsigned int argc, char **argv) } ti->private = ms; - ti->split_io = dm_rh_get_region_size(ms->rh); + + r = dm_set_target_max_io_len(ti, dm_rh_get_region_size(ms->rh)); + if (r) + goto err_free_context; + ti->num_flush_requests = 1; ti->num_discard_requests = 1; + ti->discard_zeroes_data_unsupported = 1; ms->kmirrord_wq = alloc_workqueue("kmirrord", WQ_NON_REENTRANT | WQ_MEM_RECLAIM, 0); @@ -1214,7 +1219,7 @@ static int mirror_end_io(struct dm_target *ti, struct bio *bio, * We need to dec pending if this was a write. */ if (rw == WRITE) { - if (!(bio->bi_rw & REQ_FLUSH)) + if (!(bio->bi_rw & (REQ_FLUSH | REQ_DISCARD))) dm_rh_dec(ms->rh, map_context->ll); return error; } diff --git a/drivers/md/dm-region-hash.c b/drivers/md/dm-region-hash.c index 7771ed212182..69732e03eb34 100644 --- a/drivers/md/dm-region-hash.c +++ b/drivers/md/dm-region-hash.c @@ -404,6 +404,9 @@ void dm_rh_mark_nosync(struct dm_region_hash *rh, struct bio *bio) return; } + if (bio->bi_rw & REQ_DISCARD) + return; + /* We must inform the log that the sync count has changed. */ log->type->set_region_sync(log, region, 0); @@ -524,7 +527,7 @@ void dm_rh_inc_pending(struct dm_region_hash *rh, struct bio_list *bios) struct bio *bio; for (bio = bios->head; bio; bio = bio->bi_next) { - if (bio->bi_rw & REQ_FLUSH) + if (bio->bi_rw & (REQ_FLUSH | REQ_DISCARD)) continue; rh_inc(rh, dm_rh_bio_to_region(rh, bio)); } diff --git a/drivers/md/dm-snap.c b/drivers/md/dm-snap.c index 6f758870fc19..6c0f3e33923a 100644 --- a/drivers/md/dm-snap.c +++ b/drivers/md/dm-snap.c @@ -691,7 +691,7 @@ static int dm_add_exception(void *context, chunk_t old, chunk_t new) * Return a minimum chunk size of all snapshots that have the specified origin. * Return zero if the origin has no snapshots. */ -static sector_t __minimum_chunk_size(struct origin *o) +static uint32_t __minimum_chunk_size(struct origin *o) { struct dm_snapshot *snap; unsigned chunk_size = 0; @@ -701,7 +701,7 @@ static sector_t __minimum_chunk_size(struct origin *o) chunk_size = min_not_zero(chunk_size, snap->store->chunk_size); - return chunk_size; + return (uint32_t) chunk_size; } /* @@ -1172,7 +1172,10 @@ static int snapshot_ctr(struct dm_target *ti, unsigned int argc, char **argv) ti->error = "Chunk size not set"; goto bad_read_metadata; } - ti->split_io = s->store->chunk_size; + + r = dm_set_target_max_io_len(ti, s->store->chunk_size); + if (r) + goto bad_read_metadata; return 0; @@ -1239,7 +1242,7 @@ static void __handover_exceptions(struct dm_snapshot *snap_src, snap_dest->store->snap = snap_dest; snap_src->store->snap = snap_src; - snap_dest->ti->split_io = snap_dest->store->chunk_size; + snap_dest->ti->max_io_len = snap_dest->store->chunk_size; snap_dest->valid = snap_src->valid; /* @@ -1817,9 +1820,9 @@ static void snapshot_resume(struct dm_target *ti) up_write(&s->lock); } -static sector_t get_origin_minimum_chunksize(struct block_device *bdev) +static uint32_t get_origin_minimum_chunksize(struct block_device *bdev) { - sector_t min_chunksize; + uint32_t min_chunksize; down_read(&_origins_lock); min_chunksize = __minimum_chunk_size(__lookup_origin(bdev)); @@ -1838,9 +1841,9 @@ static void snapshot_merge_resume(struct dm_target *ti) snapshot_resume(ti); /* - * snapshot-merge acts as an origin, so set ti->split_io + * snapshot-merge acts as an origin, so set ti->max_io_len */ - ti->split_io = get_origin_minimum_chunksize(s->origin->bdev); + ti->max_io_len = get_origin_minimum_chunksize(s->origin->bdev); start_merge(s); } @@ -2073,12 +2076,12 @@ static int origin_write_extent(struct dm_snapshot *merging_snap, struct origin *o; /* - * The origin's __minimum_chunk_size() got stored in split_io + * The origin's __minimum_chunk_size() got stored in max_io_len * by snapshot_merge_resume(). */ down_read(&_origins_lock); o = __lookup_origin(merging_snap->origin->bdev); - for (n = 0; n < size; n += merging_snap->ti->split_io) + for (n = 0; n < size; n += merging_snap->ti->max_io_len) if (__origin_write(&o->snapshots, sector + n, NULL) == DM_MAPIO_SUBMITTED) must_wait = 1; @@ -2138,14 +2141,14 @@ static int origin_map(struct dm_target *ti, struct bio *bio, } /* - * Set the target "split_io" field to the minimum of all the snapshots' + * Set the target "max_io_len" field to the minimum of all the snapshots' * chunk sizes. */ static void origin_resume(struct dm_target *ti) { struct dm_dev *dev = ti->private; - ti->split_io = get_origin_minimum_chunksize(dev->bdev); + ti->max_io_len = get_origin_minimum_chunksize(dev->bdev); } static int origin_status(struct dm_target *ti, status_type_t type, char *result, @@ -2176,7 +2179,6 @@ static int origin_merge(struct dm_target *ti, struct bvec_merge_data *bvm, return max_size; bvm->bi_bdev = dev->bdev; - bvm->bi_sector = bvm->bi_sector; return min(max_size, q->merge_bvec_fn(q, bvm, biovec)); } diff --git a/drivers/md/dm-stripe.c b/drivers/md/dm-stripe.c index 35c94ff24ad5..9e8f4cc63d6c 100644 --- a/drivers/md/dm-stripe.c +++ b/drivers/md/dm-stripe.c @@ -26,14 +26,12 @@ struct stripe { struct stripe_c { uint32_t stripes; int stripes_shift; - sector_t stripes_mask; /* The size of this target / num. stripes */ sector_t stripe_width; - /* stripe chunk size */ - uint32_t chunk_shift; - sector_t chunk_mask; + uint32_t chunk_size; + int chunk_size_shift; /* Needed for handling events */ struct dm_target *ti; @@ -91,7 +89,7 @@ static int get_stripe(struct dm_target *ti, struct stripe_c *sc, /* * Construct a striped mapping. - * <number of stripes> <chunk size (2^^n)> [<dev_path> <offset>]+ + * <number of stripes> <chunk size> [<dev_path> <offset>]+ */ static int stripe_ctr(struct dm_target *ti, unsigned int argc, char **argv) { @@ -99,7 +97,6 @@ static int stripe_ctr(struct dm_target *ti, unsigned int argc, char **argv) sector_t width; uint32_t stripes; uint32_t chunk_size; - char *end; int r; unsigned int i; @@ -108,34 +105,23 @@ static int stripe_ctr(struct dm_target *ti, unsigned int argc, char **argv) return -EINVAL; } - stripes = simple_strtoul(argv[0], &end, 10); - if (!stripes || *end) { + if (kstrtouint(argv[0], 10, &stripes) || !stripes) { ti->error = "Invalid stripe count"; return -EINVAL; } - chunk_size = simple_strtoul(argv[1], &end, 10); - if (*end) { + if (kstrtouint(argv[1], 10, &chunk_size) || !chunk_size) { ti->error = "Invalid chunk_size"; return -EINVAL; } - /* - * chunk_size is a power of two - */ - if (!is_power_of_2(chunk_size) || - (chunk_size < (PAGE_SIZE >> SECTOR_SHIFT))) { - ti->error = "Invalid chunk size"; - return -EINVAL; - } - - if (ti->len & (chunk_size - 1)) { + width = ti->len; + if (sector_div(width, chunk_size)) { ti->error = "Target length not divisible by " "chunk size"; return -EINVAL; } - width = ti->len; if (sector_div(width, stripes)) { ti->error = "Target length not divisible by " "number of stripes"; @@ -167,17 +153,21 @@ static int stripe_ctr(struct dm_target *ti, unsigned int argc, char **argv) if (stripes & (stripes - 1)) sc->stripes_shift = -1; - else { - sc->stripes_shift = ffs(stripes) - 1; - sc->stripes_mask = ((sector_t) stripes) - 1; - } + else + sc->stripes_shift = __ffs(stripes); + + r = dm_set_target_max_io_len(ti, chunk_size); + if (r) + return r; - ti->split_io = chunk_size; ti->num_flush_requests = stripes; ti->num_discard_requests = stripes; - sc->chunk_shift = ffs(chunk_size) - 1; - sc->chunk_mask = ((sector_t) chunk_size) - 1; + sc->chunk_size = chunk_size; + if (chunk_size & (chunk_size - 1)) + sc->chunk_size_shift = -1; + else + sc->chunk_size_shift = __ffs(chunk_size); /* * Get the stripe destinations. @@ -216,17 +206,29 @@ static void stripe_dtr(struct dm_target *ti) static void stripe_map_sector(struct stripe_c *sc, sector_t sector, uint32_t *stripe, sector_t *result) { - sector_t offset = dm_target_offset(sc->ti, sector); - sector_t chunk = offset >> sc->chunk_shift; + sector_t chunk = dm_target_offset(sc->ti, sector); + sector_t chunk_offset; + + if (sc->chunk_size_shift < 0) + chunk_offset = sector_div(chunk, sc->chunk_size); + else { + chunk_offset = chunk & (sc->chunk_size - 1); + chunk >>= sc->chunk_size_shift; + } if (sc->stripes_shift < 0) *stripe = sector_div(chunk, sc->stripes); else { - *stripe = chunk & sc->stripes_mask; + *stripe = chunk & (sc->stripes - 1); chunk >>= sc->stripes_shift; } - *result = (chunk << sc->chunk_shift) | (offset & sc->chunk_mask); + if (sc->chunk_size_shift < 0) + chunk *= sc->chunk_size; + else + chunk <<= sc->chunk_size_shift; + + *result = chunk + chunk_offset; } static void stripe_map_range_sector(struct stripe_c *sc, sector_t sector, @@ -237,9 +239,16 @@ static void stripe_map_range_sector(struct stripe_c *sc, sector_t sector, stripe_map_sector(sc, sector, &stripe, result); if (stripe == target_stripe) return; - *result &= ~sc->chunk_mask; /* round down */ + + /* round down */ + sector = *result; + if (sc->chunk_size_shift < 0) + *result -= sector_div(sector, sc->chunk_size); + else + *result = sector & ~(sector_t)(sc->chunk_size - 1); + if (target_stripe < stripe) - *result += sc->chunk_mask + 1; /* next chunk */ + *result += sc->chunk_size; /* next chunk */ } static int stripe_map_discard(struct stripe_c *sc, struct bio *bio, @@ -324,7 +333,7 @@ static int stripe_status(struct dm_target *ti, case STATUSTYPE_TABLE: DMEMIT("%d %llu", sc->stripes, - (unsigned long long)sc->chunk_mask + 1); + (unsigned long long)sc->chunk_size); for (i = 0; i < sc->stripes; i++) DMEMIT(" %s %llu", sc->stripe[i].dev->name, (unsigned long long)sc->stripe[i].physical_start); @@ -391,7 +400,7 @@ static void stripe_io_hints(struct dm_target *ti, struct queue_limits *limits) { struct stripe_c *sc = ti->private; - unsigned chunk_size = (sc->chunk_mask + 1) << 9; + unsigned chunk_size = sc->chunk_size << SECTOR_SHIFT; blk_limits_io_min(limits, chunk_size); blk_limits_io_opt(limits, chunk_size * sc->stripes); @@ -419,7 +428,7 @@ static int stripe_merge(struct dm_target *ti, struct bvec_merge_data *bvm, static struct target_type stripe_target = { .name = "striped", - .version = {1, 4, 0}, + .version = {1, 5, 0}, .module = THIS_MODULE, .ctr = stripe_ctr, .dtr = stripe_dtr, diff --git a/drivers/md/dm-thin-metadata.c b/drivers/md/dm-thin-metadata.c index 3e2907f0bc46..31f9827dfb56 100644 --- a/drivers/md/dm-thin-metadata.c +++ b/drivers/md/dm-thin-metadata.c @@ -80,6 +80,12 @@ #define THIN_METADATA_CACHE_SIZE 64 #define SECTOR_TO_BLOCK_SHIFT 3 +/* + * 3 for btree insert + + * 2 for btree lookup used within space map + */ +#define THIN_MAX_CONCURRENT_LOCKS 5 + /* This should be plenty */ #define SPACE_MAP_ROOT_SIZE 128 @@ -597,31 +603,31 @@ static int __commit_transaction(struct dm_pool_metadata *pmd) r = __write_changed_details(pmd); if (r < 0) - goto out; + return r; if (!pmd->need_commit) - goto out; + return r; r = dm_sm_commit(pmd->data_sm); if (r < 0) - goto out; + return r; r = dm_tm_pre_commit(pmd->tm); if (r < 0) - goto out; + return r; r = dm_sm_root_size(pmd->metadata_sm, &metadata_len); if (r < 0) - goto out; + return r; r = dm_sm_root_size(pmd->data_sm, &data_len); if (r < 0) - goto out; + return r; r = dm_bm_write_lock(pmd->bm, THIN_SUPERBLOCK_LOCATION, &sb_validator, &sblock); if (r) - goto out; + return r; disk_super = dm_block_data(sblock); disk_super->time = cpu_to_le32(pmd->time); @@ -644,7 +650,6 @@ static int __commit_transaction(struct dm_pool_metadata *pmd) if (!r) pmd->need_commit = 0; -out: return r; out_locked: @@ -669,13 +674,9 @@ struct dm_pool_metadata *dm_pool_metadata_open(struct block_device *bdev, return ERR_PTR(-ENOMEM); } - /* - * Max hex locks: - * 3 for btree insert + - * 2 for btree lookup used within space map - */ bm = dm_block_manager_create(bdev, THIN_METADATA_BLOCK_SIZE, - THIN_METADATA_CACHE_SIZE, 5); + THIN_METADATA_CACHE_SIZE, + THIN_MAX_CONCURRENT_LOCKS); if (!bm) { DMERR("could not create block manager"); kfree(pmd); @@ -1262,7 +1263,7 @@ dm_thin_id dm_thin_dev_id(struct dm_thin_device *td) return td->id; } -static int __snapshotted_since(struct dm_thin_device *td, uint32_t time) +static bool __snapshotted_since(struct dm_thin_device *td, uint32_t time) { return td->snapshotted_time > time; } diff --git a/drivers/md/dm-thin-metadata.h b/drivers/md/dm-thin-metadata.h index b88918ccdaf6..7b47c0a9a8e3 100644 --- a/drivers/md/dm-thin-metadata.h +++ b/drivers/md/dm-thin-metadata.h @@ -119,7 +119,7 @@ dm_thin_id dm_thin_dev_id(struct dm_thin_device *td); struct dm_thin_lookup_result { dm_block_t block; - int shared; + unsigned shared:1; }; /* diff --git a/drivers/md/dm-thin.c b/drivers/md/dm-thin.c index ce59824fb414..93e3e542cff9 100644 --- a/drivers/md/dm-thin.c +++ b/drivers/md/dm-thin.c @@ -19,7 +19,7 @@ /* * Tunable constants */ -#define ENDIO_HOOK_POOL_SIZE 10240 +#define ENDIO_HOOK_POOL_SIZE 1024 #define DEFERRED_SET_SIZE 64 #define MAPPING_POOL_SIZE 1024 #define PRISON_CELLS 1024 @@ -510,10 +510,9 @@ struct pool { struct block_device *md_dev; struct dm_pool_metadata *pmd; - uint32_t sectors_per_block; - unsigned block_shift; - dm_block_t offset_mask; dm_block_t low_water_blocks; + uint32_t sectors_per_block; + int sectors_per_block_shift; struct pool_features pf; unsigned low_water_triggered:1; /* A dm event has been sent */ @@ -526,8 +525,8 @@ struct pool { struct work_struct worker; struct delayed_work waker; - unsigned ref_count; unsigned long last_commit_jiffies; + unsigned ref_count; spinlock_t lock; struct bio_list deferred_bios; @@ -679,16 +678,28 @@ static void requeue_io(struct thin_c *tc) static dm_block_t get_bio_block(struct thin_c *tc, struct bio *bio) { - return bio->bi_sector >> tc->pool->block_shift; + sector_t block_nr = bio->bi_sector; + + if (tc->pool->sectors_per_block_shift < 0) + (void) sector_div(block_nr, tc->pool->sectors_per_block); + else + block_nr >>= tc->pool->sectors_per_block_shift; + + return block_nr; } static void remap(struct thin_c *tc, struct bio *bio, dm_block_t block) { struct pool *pool = tc->pool; + sector_t bi_sector = bio->bi_sector; bio->bi_bdev = tc->pool_dev->bdev; - bio->bi_sector = (block << pool->block_shift) + - (bio->bi_sector & pool->offset_mask); + if (tc->pool->sectors_per_block_shift < 0) + bio->bi_sector = (block * pool->sectors_per_block) + + sector_div(bi_sector, pool->sectors_per_block); + else + bio->bi_sector = (block << pool->sectors_per_block_shift) | + (bi_sector & (pool->sectors_per_block - 1)); } static void remap_to_origin(struct thin_c *tc, struct bio *bio) @@ -933,9 +944,7 @@ static void process_prepared(struct pool *pool, struct list_head *head, */ static int io_overlaps_block(struct pool *pool, struct bio *bio) { - return !(bio->bi_sector & pool->offset_mask) && - (bio->bi_size == (pool->sectors_per_block << SECTOR_SHIFT)); - + return bio->bi_size == (pool->sectors_per_block << SECTOR_SHIFT); } static int io_overwrites_block(struct pool *pool, struct bio *bio) @@ -1218,7 +1227,7 @@ static void process_discard(struct thin_c *tc, struct bio *bio) */ m = get_next_mapping(pool); m->tc = tc; - m->pass_discard = (!lookup_result.shared) & pool->pf.discard_passdown; + m->pass_discard = (!lookup_result.shared) && pool->pf.discard_passdown; m->virt_block = block; m->data_block = lookup_result.block; m->cell = cell; @@ -1234,18 +1243,16 @@ static void process_discard(struct thin_c *tc, struct bio *bio) } } else { /* - * This path is hit if people are ignoring - * limits->discard_granularity. It ignores any - * part of the discard that is in a subsequent - * block. + * The DM core makes sure that the discard doesn't span + * a block boundary. So we submit the discard of a + * partial block appropriately. */ - sector_t offset = bio->bi_sector - (block << pool->block_shift); - unsigned remaining = (pool->sectors_per_block - offset) << 9; - bio->bi_size = min(bio->bi_size, remaining); - cell_release_singleton(cell, bio); cell_release_singleton(cell2, bio); - remap_and_issue(tc, bio, lookup_result.block); + if ((!lookup_result.shared) && pool->pf.discard_passdown) + remap_and_issue(tc, bio, lookup_result.block); + else + bio_endio(bio, 0); } break; @@ -1719,8 +1726,10 @@ static struct pool *pool_create(struct mapped_device *pool_md, pool->pmd = pmd; pool->sectors_per_block = block_size; - pool->block_shift = ffs(block_size) - 1; - pool->offset_mask = block_size - 1; + if (block_size & (block_size - 1)) + pool->sectors_per_block_shift = -1; + else + pool->sectors_per_block_shift = __ffs(block_size); pool->low_water_blocks = 0; pool_features_init(&pool->pf); pool->prison = prison_create(PRISON_CELLS); @@ -1825,15 +1834,19 @@ static struct pool *__pool_find(struct mapped_device *pool_md, struct pool *pool = __pool_table_lookup_metadata_dev(metadata_dev); if (pool) { - if (pool->pool_md != pool_md) + if (pool->pool_md != pool_md) { + *error = "metadata device already in use by a pool"; return ERR_PTR(-EBUSY); + } __pool_inc(pool); } else { pool = __pool_table_lookup(pool_md); if (pool) { - if (pool->md_dev != metadata_dev) + if (pool->md_dev != metadata_dev) { + *error = "different pool cannot replace a pool"; return ERR_PTR(-EINVAL); + } __pool_inc(pool); } else { @@ -1964,7 +1977,7 @@ static int pool_ctr(struct dm_target *ti, unsigned argc, char **argv) if (kstrtoul(argv[2], 10, &block_size) || !block_size || block_size < DATA_DEV_BLOCK_SIZE_MIN_SECTORS || block_size > DATA_DEV_BLOCK_SIZE_MAX_SECTORS || - !is_power_of_2(block_size)) { + block_size & (DATA_DEV_BLOCK_SIZE_MIN_SECTORS - 1)) { ti->error = "Invalid block size"; r = -EINVAL; goto out; @@ -2011,6 +2024,15 @@ static int pool_ctr(struct dm_target *ti, unsigned argc, char **argv) goto out_flags_changed; } + /* + * The block layer requires discard_granularity to be a power of 2. + */ + if (pf.discard_enabled && !is_power_of_2(block_size)) { + ti->error = "Discard support must be disabled when the block size is not a power of 2"; + r = -EINVAL; + goto out_flags_changed; + } + pt->pool = pool; pt->ti = ti; pt->metadata_dev = metadata_dev; @@ -2090,7 +2112,8 @@ static int pool_preresume(struct dm_target *ti) int r; struct pool_c *pt = ti->private; struct pool *pool = pt->pool; - dm_block_t data_size, sb_data_size; + sector_t data_size = ti->len; + dm_block_t sb_data_size; /* * Take control of the pool object. @@ -2099,7 +2122,8 @@ static int pool_preresume(struct dm_target *ti) if (r) return r; - data_size = ti->len >> pool->block_shift; + (void) sector_div(data_size, pool->sectors_per_block); + r = dm_pool_get_data_dev_size(pool->pmd, &sb_data_size); if (r) { DMERR("failed to retrieve data device size"); @@ -2108,7 +2132,7 @@ static int pool_preresume(struct dm_target *ti) if (data_size < sb_data_size) { DMERR("pool target too small, is %llu blocks (expected %llu)", - data_size, sb_data_size); + (unsigned long long)data_size, sb_data_size); return -EINVAL; } else if (data_size > sb_data_size) { @@ -2489,7 +2513,8 @@ static void set_discard_limits(struct pool *pool, struct queue_limits *limits) /* * This is just a hint, and not enforced. We have to cope with - * bios that overlap 2 blocks. + * bios that cover a block partially. A discard that spans a block + * boundary is not sent to this target. */ limits->discard_granularity = pool->sectors_per_block << SECTOR_SHIFT; limits->discard_zeroes_data = pool->pf.zero_new_blocks; @@ -2621,13 +2646,19 @@ static int thin_ctr(struct dm_target *ti, unsigned argc, char **argv) goto bad_thin_open; } - ti->split_io = tc->pool->sectors_per_block; + r = dm_set_target_max_io_len(ti, tc->pool->sectors_per_block); + if (r) + goto bad_thin_open; + ti->num_flush_requests = 1; /* In case the pool supports discards, pass them on. */ if (tc->pool->pf.discard_enabled) { ti->discards_supported = 1; ti->num_discard_requests = 1; + ti->discard_zeroes_data_unsupported = 1; + /* Discard requests must be split on a block boundary */ + ti->split_discard_requests = 1; } dm_put(pool_md); @@ -2753,19 +2784,21 @@ static int thin_status(struct dm_target *ti, status_type_t type, static int thin_iterate_devices(struct dm_target *ti, iterate_devices_callout_fn fn, void *data) { - dm_block_t blocks; + sector_t blocks; struct thin_c *tc = ti->private; + struct pool *pool = tc->pool; /* * We can't call dm_pool_get_data_dev_size() since that blocks. So * we follow a more convoluted path through to the pool's target. */ - if (!tc->pool->ti) + if (!pool->ti) return 0; /* nothing is bound */ - blocks = tc->pool->ti->len >> tc->pool->block_shift; + blocks = pool->ti->len; + (void) sector_div(blocks, pool->sectors_per_block); if (blocks) - return fn(ti, tc->pool_dev, 0, tc->pool->sectors_per_block * blocks, data); + return fn(ti, tc->pool_dev, 0, pool->sectors_per_block * blocks, data); return 0; } @@ -2782,7 +2815,7 @@ static void thin_io_hints(struct dm_target *ti, struct queue_limits *limits) static struct target_type thin_target = { .name = "thin", - .version = {1, 1, 0}, + .version = {1, 2, 0}, .module = THIS_MODULE, .ctr = thin_ctr, .dtr = thin_dtr, diff --git a/drivers/md/dm.c b/drivers/md/dm.c index e24143cc2040..4e09b6ff5b49 100644 --- a/drivers/md/dm.c +++ b/drivers/md/dm.c @@ -968,22 +968,41 @@ static sector_t max_io_len_target_boundary(sector_t sector, struct dm_target *ti static sector_t max_io_len(sector_t sector, struct dm_target *ti) { sector_t len = max_io_len_target_boundary(sector, ti); + sector_t offset, max_len; /* - * Does the target need to split even further ? + * Does the target need to split even further? */ - if (ti->split_io) { - sector_t boundary; - sector_t offset = dm_target_offset(ti, sector); - boundary = ((offset + ti->split_io) & ~(ti->split_io - 1)) - - offset; - if (len > boundary) - len = boundary; + if (ti->max_io_len) { + offset = dm_target_offset(ti, sector); + if (unlikely(ti->max_io_len & (ti->max_io_len - 1))) + max_len = sector_div(offset, ti->max_io_len); + else + max_len = offset & (ti->max_io_len - 1); + max_len = ti->max_io_len - max_len; + + if (len > max_len) + len = max_len; } return len; } +int dm_set_target_max_io_len(struct dm_target *ti, sector_t len) +{ + if (len > UINT_MAX) { + DMERR("Specified maximum size of target IO (%llu) exceeds limit (%u)", + (unsigned long long)len, UINT_MAX); + ti->error = "Maximum size of target IO is too large"; + return -EINVAL; + } + + ti->max_io_len = (uint32_t) len; + + return 0; +} +EXPORT_SYMBOL_GPL(dm_set_target_max_io_len); + static void __map_bio(struct dm_target *ti, struct bio *clone, struct dm_target_io *tio) { @@ -1196,7 +1215,10 @@ static int __clone_and_map_discard(struct clone_info *ci) if (!ti->num_discard_requests) return -EOPNOTSUPP; - len = min(ci->sector_count, max_io_len_target_boundary(ci->sector, ti)); + if (!ti->split_discard_requests) + len = min(ci->sector_count, max_io_len_target_boundary(ci->sector, ti)); + else + len = min(ci->sector_count, max_io_len(ci->sector, ti)); __issue_target_requests(ci, ti, ti->num_discard_requests, len); diff --git a/drivers/md/persistent-data/Makefile b/drivers/md/persistent-data/Makefile index cfa95f662230..d8e7cb767c1e 100644 --- a/drivers/md/persistent-data/Makefile +++ b/drivers/md/persistent-data/Makefile @@ -1,7 +1,6 @@ obj-$(CONFIG_DM_PERSISTENT_DATA) += dm-persistent-data.o dm-persistent-data-objs := \ dm-block-manager.o \ - dm-space-map-checker.o \ dm-space-map-common.o \ dm-space-map-disk.o \ dm-space-map-metadata.o \ diff --git a/drivers/md/persistent-data/dm-space-map-checker.c b/drivers/md/persistent-data/dm-space-map-checker.c deleted file mode 100644 index fc90c11620ad..000000000000 --- a/drivers/md/persistent-data/dm-space-map-checker.c +++ /dev/null @@ -1,446 +0,0 @@ -/* - * Copyright (C) 2011 Red Hat, Inc. - * - * This file is released under the GPL. - */ - -#include "dm-space-map-checker.h" - -#include <linux/device-mapper.h> -#include <linux/export.h> -#include <linux/vmalloc.h> - -#ifdef CONFIG_DM_DEBUG_SPACE_MAPS - -#define DM_MSG_PREFIX "space map checker" - -/*----------------------------------------------------------------*/ - -struct count_array { - dm_block_t nr; - dm_block_t nr_free; - - uint32_t *counts; -}; - -static int ca_get_count(struct count_array *ca, dm_block_t b, uint32_t *count) -{ - if (b >= ca->nr) - return -EINVAL; - - *count = ca->counts[b]; - return 0; -} - -static int ca_count_more_than_one(struct count_array *ca, dm_block_t b, int *r) -{ - if (b >= ca->nr) - return -EINVAL; - - *r = ca->counts[b] > 1; - return 0; -} - -static int ca_set_count(struct count_array *ca, dm_block_t b, uint32_t count) -{ - uint32_t old_count; - - if (b >= ca->nr) - return -EINVAL; - - old_count = ca->counts[b]; - - if (!count && old_count) - ca->nr_free++; - - else if (count && !old_count) - ca->nr_free--; - - ca->counts[b] = count; - return 0; -} - -static int ca_inc_block(struct count_array *ca, dm_block_t b) -{ - if (b >= ca->nr) - return -EINVAL; - - ca_set_count(ca, b, ca->counts[b] + 1); - return 0; -} - -static int ca_dec_block(struct count_array *ca, dm_block_t b) -{ - if (b >= ca->nr) - return -EINVAL; - - BUG_ON(ca->counts[b] == 0); - ca_set_count(ca, b, ca->counts[b] - 1); - return 0; -} - -static int ca_create(struct count_array *ca, struct dm_space_map *sm) -{ - int r; - dm_block_t nr_blocks; - - r = dm_sm_get_nr_blocks(sm, &nr_blocks); - if (r) - return r; - - ca->nr = nr_blocks; - ca->nr_free = nr_blocks; - - if (!nr_blocks) - ca->counts = NULL; - else { - ca->counts = vzalloc(sizeof(*ca->counts) * nr_blocks); - if (!ca->counts) - return -ENOMEM; - } - - return 0; -} - -static void ca_destroy(struct count_array *ca) -{ - vfree(ca->counts); -} - -static int ca_load(struct count_array *ca, struct dm_space_map *sm) -{ - int r; - uint32_t count; - dm_block_t nr_blocks, i; - - r = dm_sm_get_nr_blocks(sm, &nr_blocks); - if (r) - return r; - - BUG_ON(ca->nr != nr_blocks); - - DMWARN("Loading debug space map from disk. This may take some time"); - for (i = 0; i < nr_blocks; i++) { - r = dm_sm_get_count(sm, i, &count); - if (r) { - DMERR("load failed"); - return r; - } - - ca_set_count(ca, i, count); - } - DMWARN("Load complete"); - - return 0; -} - -static int ca_extend(struct count_array *ca, dm_block_t extra_blocks) -{ - dm_block_t nr_blocks = ca->nr + extra_blocks; - uint32_t *counts = vzalloc(sizeof(*counts) * nr_blocks); - if (!counts) - return -ENOMEM; - - if (ca->counts) { - memcpy(counts, ca->counts, sizeof(*counts) * ca->nr); - ca_destroy(ca); - } - ca->nr = nr_blocks; - ca->nr_free += extra_blocks; - ca->counts = counts; - return 0; -} - -static int ca_commit(struct count_array *old, struct count_array *new) -{ - if (old->nr != new->nr) { - BUG_ON(old->nr > new->nr); - ca_extend(old, new->nr - old->nr); - } - - BUG_ON(old->nr != new->nr); - old->nr_free = new->nr_free; - memcpy(old->counts, new->counts, sizeof(*old->counts) * old->nr); - return 0; -} - -/*----------------------------------------------------------------*/ - -struct sm_checker { - struct dm_space_map sm; - - struct count_array old_counts; - struct count_array counts; - - struct dm_space_map *real_sm; -}; - -static void sm_checker_destroy(struct dm_space_map *sm) -{ - struct sm_checker *smc = container_of(sm, struct sm_checker, sm); - - dm_sm_destroy(smc->real_sm); - ca_destroy(&smc->old_counts); - ca_destroy(&smc->counts); - kfree(smc); -} - -static int sm_checker_get_nr_blocks(struct dm_space_map *sm, dm_block_t *count) -{ - struct sm_checker *smc = container_of(sm, struct sm_checker, sm); - int r = dm_sm_get_nr_blocks(smc->real_sm, count); - if (!r) - BUG_ON(smc->old_counts.nr != *count); - return r; -} - -static int sm_checker_get_nr_free(struct dm_space_map *sm, dm_block_t *count) -{ - struct sm_checker *smc = container_of(sm, struct sm_checker, sm); - int r = dm_sm_get_nr_free(smc->real_sm, count); - if (!r) { - /* - * Slow, but we know it's correct. - */ - dm_block_t b, n = 0; - for (b = 0; b < smc->old_counts.nr; b++) - if (smc->old_counts.counts[b] == 0 && - smc->counts.counts[b] == 0) - n++; - - if (n != *count) - DMERR("free block counts differ, checker %u, sm-disk:%u", - (unsigned) n, (unsigned) *count); - } - return r; -} - -static int sm_checker_new_block(struct dm_space_map *sm, dm_block_t *b) -{ - struct sm_checker *smc = container_of(sm, struct sm_checker, sm); - int r = dm_sm_new_block(smc->real_sm, b); - - if (!r) { - BUG_ON(*b >= smc->old_counts.nr); - BUG_ON(smc->old_counts.counts[*b] != 0); - BUG_ON(*b >= smc->counts.nr); - BUG_ON(smc->counts.counts[*b] != 0); - ca_set_count(&smc->counts, *b, 1); - } - - return r; -} - -static int sm_checker_inc_block(struct dm_space_map *sm, dm_block_t b) -{ - struct sm_checker *smc = container_of(sm, struct sm_checker, sm); - int r = dm_sm_inc_block(smc->real_sm, b); - int r2 = ca_inc_block(&smc->counts, b); - BUG_ON(r != r2); - return r; -} - -static int sm_checker_dec_block(struct dm_space_map *sm, dm_block_t b) -{ - struct sm_checker *smc = container_of(sm, struct sm_checker, sm); - int r = dm_sm_dec_block(smc->real_sm, b); - int r2 = ca_dec_block(&smc->counts, b); - BUG_ON(r != r2); - return r; -} - -static int sm_checker_get_count(struct dm_space_map *sm, dm_block_t b, uint32_t *result) -{ - struct sm_checker *smc = container_of(sm, struct sm_checker, sm); - uint32_t result2 = 0; - int r = dm_sm_get_count(smc->real_sm, b, result); - int r2 = ca_get_count(&smc->counts, b, &result2); - - BUG_ON(r != r2); - if (!r) - BUG_ON(*result != result2); - return r; -} - -static int sm_checker_count_more_than_one(struct dm_space_map *sm, dm_block_t b, int *result) -{ - struct sm_checker *smc = container_of(sm, struct sm_checker, sm); - int result2 = 0; - int r = dm_sm_count_is_more_than_one(smc->real_sm, b, result); - int r2 = ca_count_more_than_one(&smc->counts, b, &result2); - - BUG_ON(r != r2); - if (!r) - BUG_ON(!(*result) && result2); - return r; -} - -static int sm_checker_set_count(struct dm_space_map *sm, dm_block_t b, uint32_t count) -{ - struct sm_checker *smc = container_of(sm, struct sm_checker, sm); - uint32_t old_rc; - int r = dm_sm_set_count(smc->real_sm, b, count); - int r2; - - BUG_ON(b >= smc->counts.nr); - old_rc = smc->counts.counts[b]; - r2 = ca_set_count(&smc->counts, b, count); - BUG_ON(r != r2); - - return r; -} - -static int sm_checker_commit(struct dm_space_map *sm) -{ - struct sm_checker *smc = container_of(sm, struct sm_checker, sm); - int r; - - r = dm_sm_commit(smc->real_sm); - if (r) - return r; - - r = ca_commit(&smc->old_counts, &smc->counts); - if (r) - return r; - - return 0; -} - -static int sm_checker_extend(struct dm_space_map *sm, dm_block_t extra_blocks) -{ - struct sm_checker *smc = container_of(sm, struct sm_checker, sm); - int r = dm_sm_extend(smc->real_sm, extra_blocks); - if (r) - return r; - - return ca_extend(&smc->counts, extra_blocks); -} - -static int sm_checker_root_size(struct dm_space_map *sm, size_t *result) -{ - struct sm_checker *smc = container_of(sm, struct sm_checker, sm); - return dm_sm_root_size(smc->real_sm, result); -} - -static int sm_checker_copy_root(struct dm_space_map *sm, void *copy_to_here_le, size_t len) -{ - struct sm_checker *smc = container_of(sm, struct sm_checker, sm); - return dm_sm_copy_root(smc->real_sm, copy_to_here_le, len); -} - -/*----------------------------------------------------------------*/ - -static struct dm_space_map ops_ = { - .destroy = sm_checker_destroy, - .get_nr_blocks = sm_checker_get_nr_blocks, - .get_nr_free = sm_checker_get_nr_free, - .inc_block = sm_checker_inc_block, - .dec_block = sm_checker_dec_block, - .new_block = sm_checker_new_block, - .get_count = sm_checker_get_count, - .count_is_more_than_one = sm_checker_count_more_than_one, - .set_count = sm_checker_set_count, - .commit = sm_checker_commit, - .extend = sm_checker_extend, - .root_size = sm_checker_root_size, - .copy_root = sm_checker_copy_root -}; - -struct dm_space_map *dm_sm_checker_create(struct dm_space_map *sm) -{ - int r; - struct sm_checker *smc; - - if (IS_ERR_OR_NULL(sm)) - return ERR_PTR(-EINVAL); - - smc = kmalloc(sizeof(*smc), GFP_KERNEL); - if (!smc) - return ERR_PTR(-ENOMEM); - - memcpy(&smc->sm, &ops_, sizeof(smc->sm)); - r = ca_create(&smc->old_counts, sm); - if (r) { - kfree(smc); - return ERR_PTR(r); - } - - r = ca_create(&smc->counts, sm); - if (r) { - ca_destroy(&smc->old_counts); - kfree(smc); - return ERR_PTR(r); - } - - smc->real_sm = sm; - - r = ca_load(&smc->counts, sm); - if (r) { - ca_destroy(&smc->counts); - ca_destroy(&smc->old_counts); - kfree(smc); - return ERR_PTR(r); - } - - r = ca_commit(&smc->old_counts, &smc->counts); - if (r) { - ca_destroy(&smc->counts); - ca_destroy(&smc->old_counts); - kfree(smc); - return ERR_PTR(r); - } - - return &smc->sm; -} -EXPORT_SYMBOL_GPL(dm_sm_checker_create); - -struct dm_space_map *dm_sm_checker_create_fresh(struct dm_space_map *sm) -{ - int r; - struct sm_checker *smc; - - if (IS_ERR_OR_NULL(sm)) - return ERR_PTR(-EINVAL); - - smc = kmalloc(sizeof(*smc), GFP_KERNEL); - if (!smc) - return ERR_PTR(-ENOMEM); - - memcpy(&smc->sm, &ops_, sizeof(smc->sm)); - r = ca_create(&smc->old_counts, sm); - if (r) { - kfree(smc); - return ERR_PTR(r); - } - - r = ca_create(&smc->counts, sm); - if (r) { - ca_destroy(&smc->old_counts); - kfree(smc); - return ERR_PTR(r); - } - - smc->real_sm = sm; - return &smc->sm; -} -EXPORT_SYMBOL_GPL(dm_sm_checker_create_fresh); - -/*----------------------------------------------------------------*/ - -#else - -struct dm_space_map *dm_sm_checker_create(struct dm_space_map *sm) -{ - return sm; -} -EXPORT_SYMBOL_GPL(dm_sm_checker_create); - -struct dm_space_map *dm_sm_checker_create_fresh(struct dm_space_map *sm) -{ - return sm; -} -EXPORT_SYMBOL_GPL(dm_sm_checker_create_fresh); - -/*----------------------------------------------------------------*/ - -#endif diff --git a/drivers/md/persistent-data/dm-space-map-checker.h b/drivers/md/persistent-data/dm-space-map-checker.h deleted file mode 100644 index 444dccf6688c..000000000000 --- a/drivers/md/persistent-data/dm-space-map-checker.h +++ /dev/null @@ -1,26 +0,0 @@ -/* - * Copyright (C) 2011 Red Hat, Inc. - * - * This file is released under the GPL. - */ - -#ifndef SNAPSHOTS_SPACE_MAP_CHECKER_H -#define SNAPSHOTS_SPACE_MAP_CHECKER_H - -#include "dm-space-map.h" - -/*----------------------------------------------------------------*/ - -/* - * This space map wraps a real on-disk space map, and verifies all of its - * operations. It uses a lot of memory, so only use if you have a specific - * problem that you're debugging. - * - * Ownership of @sm passes. - */ -struct dm_space_map *dm_sm_checker_create(struct dm_space_map *sm); -struct dm_space_map *dm_sm_checker_create_fresh(struct dm_space_map *sm); - -/*----------------------------------------------------------------*/ - -#endif diff --git a/drivers/md/persistent-data/dm-space-map-disk.c b/drivers/md/persistent-data/dm-space-map-disk.c index 3d0ed5332883..f6d29e614ab7 100644 --- a/drivers/md/persistent-data/dm-space-map-disk.c +++ b/drivers/md/persistent-data/dm-space-map-disk.c @@ -4,7 +4,6 @@ * This file is released under the GPL. */ -#include "dm-space-map-checker.h" #include "dm-space-map-common.h" #include "dm-space-map-disk.h" #include "dm-space-map.h" @@ -252,9 +251,8 @@ static struct dm_space_map ops = { .copy_root = sm_disk_copy_root }; -static struct dm_space_map *dm_sm_disk_create_real( - struct dm_transaction_manager *tm, - dm_block_t nr_blocks) +struct dm_space_map *dm_sm_disk_create(struct dm_transaction_manager *tm, + dm_block_t nr_blocks) { int r; struct sm_disk *smd; @@ -285,27 +283,10 @@ bad: kfree(smd); return ERR_PTR(r); } - -struct dm_space_map *dm_sm_disk_create(struct dm_transaction_manager *tm, - dm_block_t nr_blocks) -{ - struct dm_space_map *sm = dm_sm_disk_create_real(tm, nr_blocks); - struct dm_space_map *smc; - - if (IS_ERR_OR_NULL(sm)) - return sm; - - smc = dm_sm_checker_create_fresh(sm); - if (IS_ERR(smc)) - dm_sm_destroy(sm); - - return smc; -} EXPORT_SYMBOL_GPL(dm_sm_disk_create); -static struct dm_space_map *dm_sm_disk_open_real( - struct dm_transaction_manager *tm, - void *root_le, size_t len) +struct dm_space_map *dm_sm_disk_open(struct dm_transaction_manager *tm, + void *root_le, size_t len) { int r; struct sm_disk *smd; @@ -332,13 +313,6 @@ bad: kfree(smd); return ERR_PTR(r); } - -struct dm_space_map *dm_sm_disk_open(struct dm_transaction_manager *tm, - void *root_le, size_t len) -{ - return dm_sm_checker_create( - dm_sm_disk_open_real(tm, root_le, len)); -} EXPORT_SYMBOL_GPL(dm_sm_disk_open); /*----------------------------------------------------------------*/ diff --git a/drivers/md/persistent-data/dm-transaction-manager.c b/drivers/md/persistent-data/dm-transaction-manager.c index e5604b32d91f..86c3705052a4 100644 --- a/drivers/md/persistent-data/dm-transaction-manager.c +++ b/drivers/md/persistent-data/dm-transaction-manager.c @@ -5,7 +5,6 @@ */ #include "dm-transaction-manager.h" #include "dm-space-map.h" -#include "dm-space-map-checker.h" #include "dm-space-map-disk.h" #include "dm-space-map-metadata.h" #include "dm-persistent-data-internal.h" @@ -319,15 +318,14 @@ static int dm_tm_create_internal(struct dm_block_manager *bm, int create) { int r; - struct dm_space_map *inner; - inner = dm_sm_metadata_init(); - if (IS_ERR(inner)) - return PTR_ERR(inner); + *sm = dm_sm_metadata_init(); + if (IS_ERR(*sm)) + return PTR_ERR(*sm); - *tm = dm_tm_create(bm, inner); + *tm = dm_tm_create(bm, *sm); if (IS_ERR(*tm)) { - dm_sm_destroy(inner); + dm_sm_destroy(*sm); return PTR_ERR(*tm); } @@ -339,19 +337,13 @@ static int dm_tm_create_internal(struct dm_block_manager *bm, goto bad1; } - r = dm_sm_metadata_create(inner, *tm, dm_bm_nr_blocks(bm), + r = dm_sm_metadata_create(*sm, *tm, dm_bm_nr_blocks(bm), sb_location); if (r) { DMERR("couldn't create metadata space map"); goto bad2; } - *sm = dm_sm_checker_create(inner); - if (IS_ERR(*sm)) { - r = PTR_ERR(*sm); - goto bad2; - } - } else { r = dm_bm_write_lock(dm_tm_get_bm(*tm), sb_location, sb_validator, sblock); @@ -360,19 +352,13 @@ static int dm_tm_create_internal(struct dm_block_manager *bm, goto bad1; } - r = dm_sm_metadata_open(inner, *tm, + r = dm_sm_metadata_open(*sm, *tm, dm_block_data(*sblock) + root_offset, root_max_len); if (r) { DMERR("couldn't open metadata space map"); goto bad2; } - - *sm = dm_sm_checker_create(inner); - if (IS_ERR(*sm)) { - r = PTR_ERR(*sm); - goto bad2; - } } return 0; @@ -381,7 +367,6 @@ bad2: dm_tm_unlock(*tm, *sblock); bad1: dm_tm_destroy(*tm); - dm_sm_destroy(inner); return r; } |