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authorAlasdair G Kergon <agk@redhat.com>2005-07-07 17:59:34 -0700
committerLinus Torvalds <torvalds@g5.osdl.org>2005-07-07 18:24:11 -0700
commitd88854f08961d26f3a63cfae7972188d26a128e4 (patch)
tree60a7319d8c79898325baaab17b655acaf2ec8040 /drivers
parent374a6cf281771b23e263efd31fdc896924394dba (diff)
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[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>
Diffstat (limited to 'drivers')
-rw-r--r--drivers/md/dm-raid1.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/md/dm-raid1.c b/drivers/md/dm-raid1.c
index 6e3cf7e1345..12031c9d3f1 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) {