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]>
--- diff/drivers/md/dm-raid1.c 2005-06-17 20:48:29.000000000 +0100
+++ source/drivers/md/dm-raid1.c 2005-06-29 21:12:13.000000000 +0100
@@ -1060,6 +1060,7 @@
}
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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