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-rw-r--r--drivers/md/dm.c63
1 files changed, 41 insertions, 22 deletions
diff --git a/drivers/md/dm.c b/drivers/md/dm.c
index aeb63a3ac330..b5764a86c8b5 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);