diff options
Diffstat (limited to 'drivers/md')
| -rw-r--r-- | drivers/md/dm.c | 63 |
1 files changed, 41 insertions, 22 deletions
diff --git a/drivers/md/dm.c b/drivers/md/dm.c index aeb63a3ac33..b5764a86c8b 100644 --- a/drivers/md/dm.c +++ b/drivers/md/dm.c @@ -102,6 +102,8 @@ struct mapped_device { mempool_t *io_pool; mempool_t *tio_pool; + struct bio_set *bs; + /* * Event handling. */ @@ -122,16 +124,10 @@ struct mapped_device { static kmem_cache_t *_io_cache; static kmem_cache_t *_tio_cache; -static struct bio_set *dm_set; - static int __init local_init(void) { int r; - dm_set = bioset_create(16, 16, 4); - if (!dm_set) - return -ENOMEM; - /* allocate a slab for the dm_ios */ _io_cache = kmem_cache_create("dm_io", sizeof(struct dm_io), 0, 0, NULL, NULL); @@ -165,8 +161,6 @@ static void local_exit(void) kmem_cache_destroy(_tio_cache); kmem_cache_destroy(_io_cache); - bioset_free(dm_set); - if (unregister_blkdev(_major, _name) < 0) DMERR("unregister_blkdev failed"); @@ -475,7 +469,7 @@ static int clone_endio(struct bio *bio, unsigned int done, int error) { int r = 0; struct target_io *tio = bio->bi_private; - struct dm_io *io = tio->io; + struct mapped_device *md = tio->io->md; dm_endio_fn endio = tio->ti->type->end_io; if (bio->bi_size) @@ -494,9 +488,15 @@ static int clone_endio(struct bio *bio, unsigned int done, int error) return 1; } - free_tio(io->md, tio); - dec_pending(io, error); + dec_pending(tio->io, error); + + /* + * Store md for cleanup instead of tio which is about to get freed. + */ + bio->bi_private = md->bs; + bio_put(bio); + free_tio(md, tio); return r; } @@ -525,6 +525,7 @@ static void __map_bio(struct dm_target *ti, struct bio *clone, { int r; sector_t sector; + struct mapped_device *md; /* * Sanity checks. @@ -554,10 +555,14 @@ static void __map_bio(struct dm_target *ti, struct bio *clone, else if (r < 0) { /* error the io and bail out */ - struct dm_io *io = tio->io; - free_tio(tio->io->md, tio); - dec_pending(io, r); + md = tio->io->md; + dec_pending(tio->io, r); + /* + * Store bio_set for cleanup. + */ + clone->bi_private = md->bs; bio_put(clone); + free_tio(md, tio); } } @@ -573,7 +578,9 @@ struct clone_info { static void dm_bio_destructor(struct bio *bio) { - bio_free(bio, dm_set); + struct bio_set *bs = bio->bi_private; + + bio_free(bio, bs); } /* @@ -581,12 +588,12 @@ static void dm_bio_destructor(struct bio *bio) */ static struct bio *split_bvec(struct bio *bio, sector_t sector, unsigned short idx, unsigned int offset, - unsigned int len) + unsigned int len, struct bio_set *bs) { struct bio *clone; struct bio_vec *bv = bio->bi_io_vec + idx; - clone = bio_alloc_bioset(GFP_NOIO, 1, dm_set); + clone = bio_alloc_bioset(GFP_NOIO, 1, bs); clone->bi_destructor = dm_bio_destructor; *clone->bi_io_vec = *bv; @@ -606,11 +613,13 @@ static struct bio *split_bvec(struct bio *bio, sector_t sector, */ static struct bio *clone_bio(struct bio *bio, sector_t sector, unsigned short idx, unsigned short bv_count, - unsigned int len) + unsigned int len, struct bio_set *bs) { struct bio *clone; - clone = bio_clone(bio, GFP_NOIO); + clone = bio_alloc_bioset(GFP_NOIO, bio->bi_max_vecs, bs); + __bio_clone(clone, bio); + clone->bi_destructor = dm_bio_destructor; clone->bi_sector = sector; clone->bi_idx = idx; clone->bi_vcnt = idx + bv_count; @@ -641,7 +650,8 @@ static void __clone_and_map(struct clone_info *ci) * the remaining io with a single clone. */ clone = clone_bio(bio, ci->sector, ci->idx, - bio->bi_vcnt - ci->idx, ci->sector_count); + bio->bi_vcnt - ci->idx, ci->sector_count, + ci->md->bs); __map_bio(ti, clone, tio); ci->sector_count = 0; @@ -664,7 +674,8 @@ static void __clone_and_map(struct clone_info *ci) len += bv_len; } - clone = clone_bio(bio, ci->sector, ci->idx, i - ci->idx, len); + clone = clone_bio(bio, ci->sector, ci->idx, i - ci->idx, len, + ci->md->bs); __map_bio(ti, clone, tio); ci->sector += len; @@ -693,7 +704,8 @@ static void __clone_and_map(struct clone_info *ci) len = min(remaining, max); clone = split_bvec(bio, ci->sector, ci->idx, - bv->bv_offset + offset, len); + bv->bv_offset + offset, len, + ci->md->bs); __map_bio(ti, clone, tio); @@ -961,6 +973,10 @@ static struct mapped_device *alloc_dev(int minor) if (!md->tio_pool) goto bad3; + md->bs = bioset_create(16, 16, 4); + if (!md->bs) + goto bad_no_bioset; + md->disk = alloc_disk(1); if (!md->disk) goto bad4; @@ -988,6 +1004,8 @@ static struct mapped_device *alloc_dev(int minor) return md; bad4: + bioset_free(md->bs); + bad_no_bioset: mempool_destroy(md->tio_pool); bad3: mempool_destroy(md->io_pool); @@ -1012,6 +1030,7 @@ static void free_dev(struct mapped_device *md) } mempool_destroy(md->tio_pool); mempool_destroy(md->io_pool); + bioset_free(md->bs); del_gendisk(md->disk); free_minor(minor); |