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dm: introduce the target flag mempool_needs_integrity

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This commit introduces the dm target flag mempool_needs_integrity. When
the flag is set, device mapper will call bioset_integrity_create on it's
bio sets. The target can then call bio_integrity_alloc on the bios
allocated from the table's mempool.

Signed-off-by: Mikulas Patocka <mpatocka@redhat.com>
Signed-off-by: Mike Snitzer <snitzer@kernel.org>
This commit is contained in:
Mikulas Patocka 2024-07-10 20:53:12 +02:00 committed by Mike Snitzer
parent d176fadb9e
commit 617069741d
2 changed files with 11 additions and 2 deletions
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7
drivers/md/dm-table.c
View File

@ -1050,6 +1050,7 @@ static int dm_table_alloc_md_mempools(struct dm_table *t, struct mapped_device *
unsigned int min_pool_size = 0, pool_size;
struct dm_md_mempools *pools;
unsigned int bioset_flags = 0;
bool mempool_needs_integrity = t->integrity_supported;
if (unlikely(type == DM_TYPE_NONE)) {
DMERR("no table type is set, can't allocate mempools");
@ -1074,6 +1075,8 @@ static int dm_table_alloc_md_mempools(struct dm_table *t, struct mapped_device *
per_io_data_size = max(per_io_data_size, ti->per_io_data_size);
min_pool_size = max(min_pool_size, ti->num_flush_bios);
mempool_needs_integrity |= ti->mempool_needs_integrity;
}
pool_size = max(dm_get_reserved_bio_based_ios(), min_pool_size);
front_pad = roundup(per_io_data_size,
@ -1083,13 +1086,13 @@ static int dm_table_alloc_md_mempools(struct dm_table *t, struct mapped_device *
__alignof__(struct dm_io)) + DM_IO_BIO_OFFSET;
if (bioset_init(&pools->io_bs, pool_size, io_front_pad, bioset_flags))
goto out_free_pools;
if (t->integrity_supported &&
if (mempool_needs_integrity &&
bioset_integrity_create(&pools->io_bs, pool_size))
goto out_free_pools;
init_bs:
if (bioset_init(&pools->bs, pool_size, front_pad, 0))
goto out_free_pools;
if (t->integrity_supported &&
if (mempool_needs_integrity &&
bioset_integrity_create(&pools->bs, pool_size))
goto out_free_pools;

6
include/linux/device-mapper.h
View File

@ -405,6 +405,12 @@ struct dm_target {
* support it.
*/
bool flush_bypasses_map:1;
/*
* Set if the target calls bio_integrity_alloc on bios received
* in the map method.
*/
bool mempool_needs_integrity:1;
};
void *dm_per_bio_data(struct bio *bio, size_t data_size);