dm: add integrity support
This patch provides support for data integrity passthrough in the device mapper. - If one or more component devices support integrity an integrity profile is preallocated for the DM device. - If all component devices have compatible profiles the DM device is flagged as capable. - Handle integrity metadata when splitting and cloning bios. Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com> Signed-off-by: Alasdair G Kergon <agk@redhat.com>
This commit is contained in:
parent
577c9c456f
commit
9c47008d13
|
@ -1047,6 +1047,19 @@ static int populate_table(struct dm_table *table,
|
||||||
return dm_table_complete(table);
|
return dm_table_complete(table);
|
||||||
}
|
}
|
||||||
|
|
||||||
|
static int table_prealloc_integrity(struct dm_table *t,
|
||||||
|
struct mapped_device *md)
|
||||||
|
{
|
||||||
|
struct list_head *devices = dm_table_get_devices(t);
|
||||||
|
struct dm_dev_internal *dd;
|
||||||
|
|
||||||
|
list_for_each_entry(dd, devices, list)
|
||||||
|
if (bdev_get_integrity(dd->dm_dev.bdev))
|
||||||
|
return blk_integrity_register(dm_disk(md), NULL);
|
||||||
|
|
||||||
|
return 0;
|
||||||
|
}
|
||||||
|
|
||||||
static int table_load(struct dm_ioctl *param, size_t param_size)
|
static int table_load(struct dm_ioctl *param, size_t param_size)
|
||||||
{
|
{
|
||||||
int r;
|
int r;
|
||||||
|
@ -1068,6 +1081,14 @@ static int table_load(struct dm_ioctl *param, size_t param_size)
|
||||||
goto out;
|
goto out;
|
||||||
}
|
}
|
||||||
|
|
||||||
|
r = table_prealloc_integrity(t, md);
|
||||||
|
if (r) {
|
||||||
|
DMERR("%s: could not register integrity profile.",
|
||||||
|
dm_device_name(md));
|
||||||
|
dm_table_destroy(t);
|
||||||
|
goto out;
|
||||||
|
}
|
||||||
|
|
||||||
down_write(&_hash_lock);
|
down_write(&_hash_lock);
|
||||||
hc = dm_get_mdptr(md);
|
hc = dm_get_mdptr(md);
|
||||||
if (!hc || hc->md != md) {
|
if (!hc || hc->md != md) {
|
||||||
|
|
|
@ -879,6 +879,45 @@ struct dm_target *dm_table_find_target(struct dm_table *t, sector_t sector)
|
||||||
return &t->targets[(KEYS_PER_NODE * n) + k];
|
return &t->targets[(KEYS_PER_NODE * n) + k];
|
||||||
}
|
}
|
||||||
|
|
||||||
|
/*
|
||||||
|
* Set the integrity profile for this device if all devices used have
|
||||||
|
* matching profiles.
|
||||||
|
*/
|
||||||
|
static void dm_table_set_integrity(struct dm_table *t)
|
||||||
|
{
|
||||||
|
struct list_head *devices = dm_table_get_devices(t);
|
||||||
|
struct dm_dev_internal *prev = NULL, *dd = NULL;
|
||||||
|
|
||||||
|
if (!blk_get_integrity(dm_disk(t->md)))
|
||||||
|
return;
|
||||||
|
|
||||||
|
list_for_each_entry(dd, devices, list) {
|
||||||
|
if (prev &&
|
||||||
|
blk_integrity_compare(prev->dm_dev.bdev->bd_disk,
|
||||||
|
dd->dm_dev.bdev->bd_disk) < 0) {
|
||||||
|
DMWARN("%s: integrity not set: %s and %s mismatch",
|
||||||
|
dm_device_name(t->md),
|
||||||
|
prev->dm_dev.bdev->bd_disk->disk_name,
|
||||||
|
dd->dm_dev.bdev->bd_disk->disk_name);
|
||||||
|
goto no_integrity;
|
||||||
|
}
|
||||||
|
prev = dd;
|
||||||
|
}
|
||||||
|
|
||||||
|
if (!prev || !bdev_get_integrity(prev->dm_dev.bdev))
|
||||||
|
goto no_integrity;
|
||||||
|
|
||||||
|
blk_integrity_register(dm_disk(t->md),
|
||||||
|
bdev_get_integrity(prev->dm_dev.bdev));
|
||||||
|
|
||||||
|
return;
|
||||||
|
|
||||||
|
no_integrity:
|
||||||
|
blk_integrity_register(dm_disk(t->md), NULL);
|
||||||
|
|
||||||
|
return;
|
||||||
|
}
|
||||||
|
|
||||||
void dm_table_set_restrictions(struct dm_table *t, struct request_queue *q)
|
void dm_table_set_restrictions(struct dm_table *t, struct request_queue *q)
|
||||||
{
|
{
|
||||||
/*
|
/*
|
||||||
|
@ -899,6 +938,7 @@ void dm_table_set_restrictions(struct dm_table *t, struct request_queue *q)
|
||||||
else
|
else
|
||||||
queue_flag_set_unlocked(QUEUE_FLAG_CLUSTER, q);
|
queue_flag_set_unlocked(QUEUE_FLAG_CLUSTER, q);
|
||||||
|
|
||||||
|
dm_table_set_integrity(t);
|
||||||
}
|
}
|
||||||
|
|
||||||
unsigned int dm_table_get_num_targets(struct dm_table *t)
|
unsigned int dm_table_get_num_targets(struct dm_table *t)
|
||||||
|
|
|
@ -700,6 +700,12 @@ static struct bio *split_bvec(struct bio *bio, sector_t sector,
|
||||||
clone->bi_io_vec->bv_len = clone->bi_size;
|
clone->bi_io_vec->bv_len = clone->bi_size;
|
||||||
clone->bi_flags |= 1 << BIO_CLONED;
|
clone->bi_flags |= 1 << BIO_CLONED;
|
||||||
|
|
||||||
|
if (bio_integrity(bio)) {
|
||||||
|
bio_integrity_clone(clone, bio, GFP_NOIO);
|
||||||
|
bio_integrity_trim(clone,
|
||||||
|
bio_sector_offset(bio, idx, offset), len);
|
||||||
|
}
|
||||||
|
|
||||||
return clone;
|
return clone;
|
||||||
}
|
}
|
||||||
|
|
||||||
|
@ -721,6 +727,14 @@ static struct bio *clone_bio(struct bio *bio, sector_t sector,
|
||||||
clone->bi_size = to_bytes(len);
|
clone->bi_size = to_bytes(len);
|
||||||
clone->bi_flags &= ~(1 << BIO_SEG_VALID);
|
clone->bi_flags &= ~(1 << BIO_SEG_VALID);
|
||||||
|
|
||||||
|
if (bio_integrity(bio)) {
|
||||||
|
bio_integrity_clone(clone, bio, GFP_NOIO);
|
||||||
|
|
||||||
|
if (idx != bio->bi_idx || clone->bi_size < bio->bi_size)
|
||||||
|
bio_integrity_trim(clone,
|
||||||
|
bio_sector_offset(bio, idx, 0), len);
|
||||||
|
}
|
||||||
|
|
||||||
return clone;
|
return clone;
|
||||||
}
|
}
|
||||||
|
|
||||||
|
@ -1193,6 +1207,7 @@ static void free_dev(struct mapped_device *md)
|
||||||
mempool_destroy(md->tio_pool);
|
mempool_destroy(md->tio_pool);
|
||||||
mempool_destroy(md->io_pool);
|
mempool_destroy(md->io_pool);
|
||||||
bioset_free(md->bs);
|
bioset_free(md->bs);
|
||||||
|
blk_integrity_unregister(md->disk);
|
||||||
del_gendisk(md->disk);
|
del_gendisk(md->disk);
|
||||||
free_minor(minor);
|
free_minor(minor);
|
||||||
|
|
||||||
|
|
Loading…
Reference in New Issue