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dm crypt: tidy crypt alloc

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Factor out crypt io allocation code.
Later patches will call it from another place.

No functional change.

Signed-off-by: Milan Broz <mbroz@redhat.com>
Signed-off-by: Alasdair G Kergon <agk@redhat.com>
This commit is contained in:
Milan Broz 2008-10-10 13:37:03 +01:00 committed by Alasdair G Kergon
parent 3e1a8bdd05
commit dc440d1e56
1 changed files with 17 additions and 7 deletions
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24
drivers/md/dm-crypt.c
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@ -517,6 +517,22 @@ static void crypt_free_buffer_pages(struct crypt_config *cc, struct bio *clone)
}
}
static struct dm_crypt_io *crypt_io_alloc(struct dm_target *ti,
struct bio *bio, sector_t sector)
{
struct crypt_config *cc = ti->private;
struct dm_crypt_io *io;
io = mempool_alloc(cc->io_pool, GFP_NOIO);
io->target = ti;
io->base_bio = bio;
io->sector = sector;
io->error = 0;
atomic_set(&io->pending, 0);
return io;
}
static void crypt_inc_pending(struct dm_crypt_io *io)
{
atomic_inc(&io->pending);
@ -1113,15 +1129,9 @@ static void crypt_dtr(struct dm_target *ti)
static int crypt_map(struct dm_target *ti, struct bio *bio,
union map_info *map_context)
{
struct crypt_config *cc = ti->private;
struct dm_crypt_io *io;
io = mempool_alloc(cc->io_pool, GFP_NOIO);
io->target = ti;
io->base_bio = bio;
io->sector = bio->bi_sector - ti->begin;
io->error = 0;
atomic_set(&io->pending, 0);
io = crypt_io_alloc(ti, bio, bio->bi_sector - ti->begin);
if (bio_data_dir(io->base_bio) == READ)
kcryptd_queue_io(io);