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| author | Mikulas Patocka <mpatocka@redhat.com> | 2017-04-18 16:51:48 -0400 |
|---|---|---|
| committer | Mike Snitzer <snitzer@redhat.com> | 2017-04-24 12:04:32 -0400 |
| commit | e2460f2a4bc740fae9e23f14d653cf53e90b3f9a (patch) | |
| tree | 61cf54345c7bca5844099f29abf0aa7da53135e8 /drivers/md/dm-linear.c | |
| parent | 3c12016910061c2a19d985fba7f7dec19d6a3a09 (diff) | |
| download | linux-stable-e2460f2a4bc740fae9e23f14d653cf53e90b3f9a.tar.gz linux-stable-e2460f2a4bc740fae9e23f14d653cf53e90b3f9a.tar.bz2 linux-stable-e2460f2a4bc740fae9e23f14d653cf53e90b3f9a.zip | |
dm: mark targets that pass integrity data
A dm-crypt on dm-integrity device incorrectly advertises an integrity
profile on the DM crypt device. It can be seen in the files
"/sys/block/dm-*/integrity/*" that both dm-integrity and dm-crypt target
advertise the integrity profile. That is incorrect, only the
dm-integrity target should advertise the integrity profile.
A general problem in DM is that if we have a DM device that depends on
another device with an integrity profile, the upper device will always
advertise the integrity profile, even when the target driver doesn't
support handling integrity data.
Most targets don't support integrity data, so we provide a whitelist of
targets that support it (linear, delay and striped). The targets that
support passing integrity data to the lower device are marked with the
flag DM_TARGET_PASSES_INTEGRITY. The DM core will now advertise
integrity data on a DM device only if all the targets support the
integrity data.
Signed-off-by: Mikulas Patocka <mpatocka@redhat.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
Diffstat (limited to 'drivers/md/dm-linear.c')
| -rw-r--r-- | drivers/md/dm-linear.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/md/dm-linear.c b/drivers/md/dm-linear.c index 4788b0b989a9..ffa0c9c5968a 100644 --- a/drivers/md/dm-linear.c +++ b/drivers/md/dm-linear.c @@ -162,6 +162,7 @@ static long linear_direct_access(struct dm_target *ti, sector_t sector, static struct target_type linear_target = { .name = "linear", .version = {1, 3, 0}, + .features = DM_TARGET_PASSES_INTEGRITY, .module = THIS_MODULE, .ctr = linear_ctr, .dtr = linear_dtr, |