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dm verity: use per_bio_data

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Replace io_mempool with per_bio_data in dm-verity.

Signed-off-by: Mikulas Patocka <mpatocka@redhat.com>
Signed-off-by: Alasdair G Kergon <agk@redhat.com>
This commit is contained in:
Mikulas Patocka 2012-12-21 20:23:38 +00:00 committed by Alasdair G Kergon
parent 39cf0ed27e
commit e42c3f914d
1 changed files with 4 additions and 18 deletions
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22
drivers/md/dm-verity.c
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@ -55,7 +55,6 @@ struct dm_verity {
unsigned shash_descsize;/* the size of temporary space for crypto */
int hash_failed; /* set to 1 if hash of any block failed */
mempool_t *io_mempool; /* mempool of struct dm_verity_io */
mempool_t *vec_mempool; /* mempool of bio vector */
struct workqueue_struct *verify_wq;
@ -66,7 +65,6 @@ struct dm_verity {
struct dm_verity_io {
struct dm_verity *v;
struct bio *bio;
/* original values of bio->bi_end_io and bio->bi_private */
bio_end_io_t *orig_bi_end_io;
@ -389,8 +387,8 @@ static int verity_verify_io(struct dm_verity_io *io)
*/
static void verity_finish_io(struct dm_verity_io *io, int error)
{
struct bio *bio = io->bio;
struct dm_verity *v = io->v;
struct bio *bio = dm_bio_from_per_bio_data(io, v->ti->per_bio_data_size);
bio->bi_end_io = io->orig_bi_end_io;
bio->bi_private = io->orig_bi_private;
@ -398,8 +396,6 @@ static void verity_finish_io(struct dm_verity_io *io, int error)
if (io->io_vec != io->io_vec_inline)
mempool_free(io->io_vec, v->vec_mempool);
mempool_free(io, v->io_mempool);
bio_endio(bio, error);
}
@ -486,9 +482,8 @@ static int verity_map(struct dm_target *ti, struct bio *bio,
if (bio_data_dir(bio) == WRITE)
return -EIO;
io = mempool_alloc(v->io_mempool, GFP_NOIO);
io = dm_per_bio_data(bio, ti->per_bio_data_size);
io->v = v;
io->bio = bio;
io->orig_bi_end_io = bio->bi_end_io;
io->orig_bi_private = bio->bi_private;
io->block = bio->bi_sector >> (v->data_dev_block_bits - SECTOR_SHIFT);
@ -610,9 +605,6 @@ static void verity_dtr(struct dm_target *ti)
if (v->vec_mempool)
mempool_destroy(v->vec_mempool);
if (v->io_mempool)
mempool_destroy(v->io_mempool);
if (v->bufio)
dm_bufio_client_destroy(v->bufio);
@ -841,13 +833,7 @@ static int verity_ctr(struct dm_target *ti, unsigned argc, char **argv)
goto bad;
}
v->io_mempool = mempool_create_kmalloc_pool(DM_VERITY_MEMPOOL_SIZE,
sizeof(struct dm_verity_io) + v->shash_descsize + v->digest_size * 2);
if (!v->io_mempool) {
ti->error = "Cannot allocate io mempool";
r = -ENOMEM;
goto bad;
}
ti->per_bio_data_size = roundup(sizeof(struct dm_verity_io) + v->shash_descsize + v->digest_size * 2, __alignof__(struct dm_verity_io));
v->vec_mempool = mempool_create_kmalloc_pool(DM_VERITY_MEMPOOL_SIZE,
BIO_MAX_PAGES * sizeof(struct bio_vec));
@ -875,7 +861,7 @@ static int verity_ctr(struct dm_target *ti, unsigned argc, char **argv)
static struct target_type verity_target = {
.name = "verity",
.version = {1, 0, 0},
.version = {1, 1, 0},
.module = THIS_MODULE,
.ctr = verity_ctr,
.dtr = verity_dtr,