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dm-verity: remove the unused "data_start" variable

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Remove the unused "data_start" variable. It is always set to zero and the
user can't override it. If the user needs to use some existing offset
within a block device, it is possible to use the linear target.

Signed-off-by: Mikulas Patocka <mpatocka@redhat.com>
This commit is contained in:
Mikulas Patocka 2024-11-18 16:15:20 +01:00
parent 61a57254a9
commit a573e404cb
2 changed files with 3 additions and 4 deletions
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6
drivers/md/dm-verity-target.c
View File

@ -93,7 +93,7 @@ static void dm_bufio_alloc_callback(struct dm_buffer *buf)
*/
static sector_t verity_map_sector(struct dm_verity *v, sector_t bi_sector)
{
return v->data_start + dm_target_offset(v->ti, bi_sector);
return dm_target_offset(v->ti, bi_sector);
}
/*
@ -952,7 +952,7 @@ static int verity_prepare_ioctl(struct dm_target *ti, struct block_device **bdev
*bdev = v->data_dev->bdev;
if (v->data_start || ti->len != bdev_nr_sectors(v->data_dev->bdev))
if (ti->len != bdev_nr_sectors(v->data_dev->bdev))
return 1;
return 0;
}
@ -962,7 +962,7 @@ static int verity_iterate_devices(struct dm_target *ti,
{
struct dm_verity *v = ti->private;
return fn(ti, v->data_dev, v->data_start, ti->len, data);
return fn(ti, v->data_dev, 0, ti->len, data);
}
static void verity_io_hints(struct dm_target *ti, struct queue_limits *limits)

1
drivers/md/dm-verity.h
View File

@ -50,7 +50,6 @@ struct dm_verity {
unsigned int sig_size; /* root digest signature size */
#endif /* CONFIG_SECURITY */
unsigned int salt_size;
sector_t data_start; /* data offset in 512-byte sectors */
sector_t hash_start; /* hash start in blocks */
sector_t data_blocks; /* the number of data blocks */
sector_t hash_blocks; /* the number of hash blocks */