diff options
| author | Mike Snitzer <snitzer@redhat.com> | 2012-12-21 21:23:30 +0100 |
|---|---|---|
| committer | Alasdair G Kergon <agk@redhat.com> | 2012-12-21 21:23:30 +0100 |
| commit | c1a94672a830e01d58c7c7e8de530c3f136d6ff2 (patch) | |
| tree | 00f9fa087a3bbae3fe55bda80f6b222512eea51a /drivers/md | |
| parent | dm ioctl: prevent unsafe change to dm_ioctl data_size (diff) | |
| download | linux-c1a94672a830e01d58c7c7e8de530c3f136d6ff2.tar.xz linux-c1a94672a830e01d58c7c7e8de530c3f136d6ff2.zip | |
dm: disable WRITE SAME
WRITE SAME bios are not yet handled correctly by device-mapper so
disable their use on device-mapper devices by setting
max_write_same_sectors to zero.
As an example, a ciphertext device is incompatible because the data
gets changed according to the location at which it written and so the
dm crypt target cannot support it.
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
Cc: stable@vger.kernel.org
Cc: Milan Broz <mbroz@redhat.com>
Signed-off-by: Alasdair G Kergon <agk@redhat.com>
Diffstat (limited to 'drivers/md')
| -rw-r--r-- | drivers/md/dm-table.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/md/dm-table.c b/drivers/md/dm-table.c index 100368eb7991..fa2955790031 100644 --- a/drivers/md/dm-table.c +++ b/drivers/md/dm-table.c @@ -1445,6 +1445,8 @@ void dm_table_set_restrictions(struct dm_table *t, struct request_queue *q, else queue_flag_clear_unlocked(QUEUE_FLAG_NONROT, q); + q->limits.max_write_same_sectors = 0; + dm_table_set_integrity(t); /* |