tree 60a7319d8c79898325baaab17b655acaf2ec8040
parent 374a6cf281771b23e263efd31fdc896924394dba
author Alasdair G Kergon <[EMAIL PROTECTED]> Fri, 08 Jul 2005 07:59:34 -0700
committer Linus Torvalds <[EMAIL PROTECTED]> Fri, 08 Jul 2005 08:24:11 -0700
[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" <[EMAIL PROTECTED]>
From: Kevin Corry <[EMAIL PROTECTED]>
Signed-Off-By: Alasdair G Kergon <[EMAIL PROTECTED]>
Signed-off-by: Andrew Morton <[EMAIL PROTECTED]>
Signed-off-by: Linus Torvalds <[EMAIL PROTECTED]>
drivers/md/dm-raid1.c | 1 +
1 files changed, 1 insertion(+)
diff --git a/drivers/md/dm-raid1.c b/drivers/md/dm-raid1.c
--- a/drivers/md/dm-raid1.c
+++ b/drivers/md/dm-raid1.c
@@ -1060,6 +1060,7 @@ static int mirror_ctr(struct dm_target *
}
ti->private = ms;
+ ti->split_io = ms->rh.region_size;
r = kcopyd_client_create(DM_IO_PAGES, &ms->kcopyd_client);
if (r) {
-
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