diff options
| author | Alasdair G Kergon | 2005-07-07 17:59:34 -0700 |
|---|---|---|
| committer | Linus Torvalds | 2005-07-07 18:24:11 -0700 |
| commit | d88854f08961d26f3a63cfae7972188d26a128e4 (patch) | |
| tree | 60a7319d8c79898325baaab17b655acaf2ec8040 | |
| parent | 374a6cf281771b23e263efd31fdc896924394dba (diff) | |
[PATCH] device-mapper: dm-raid1: Limit bios to size of mirror region
Set the target's split_io field when building a dm-mirror device so
incoming bios won't span the mirror's internal regions. Without this,
regions can be accessed while not holding correct locks and data corruption
is possible.
Reported-By: "Zhao Qian" <zhaoqian@aaastor.com>
From: Kevin Corry <kevcorry@us.ibm.com>
Signed-Off-By: Alasdair G Kergon <agk@redhat.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
| -rw-r--r-- | drivers/md/dm-raid1.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/md/dm-raid1.c b/drivers/md/dm-raid1.c index 6e3cf7e13451..12031c9d3f1e 100644 --- a/drivers/md/dm-raid1.c +++ b/drivers/md/dm-raid1.c @@ -1060,6 +1060,7 @@ static int mirror_ctr(struct dm_target *ti, unsigned int argc, char **argv) } ti->private = ms; + ti->split_io = ms->rh.region_size; r = kcopyd_client_create(DM_IO_PAGES, &ms->kcopyd_client); if (r) { |