Alasdair G Kergon <[email protected]> wrote:
>
> 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) {
Ahem.
drivers/md/dm-raid1.c: In function `mirror_ctr':
drivers/md/dm-raid1.c:1072: invalid type argument of `->'
--- devel/drivers/md/dm-raid1.c~device-mapper-dm-raid1-limit-bios-to-size-of-mirror-region-fix 2005-07-01 00:25:26.000000000 -0700
+++ devel-akpm/drivers/md/dm-raid1.c 2005-07-01 00:25:26.000000000 -0700
@@ -1060,7 +1060,7 @@ static int mirror_ctr(struct dm_target *
}
ti->private = ms;
- ti->split_io = ms->rh->region_size;
+ ti->split_io = ms->rh.region_size;
r = kcopyd_client_create(DM_IO_PAGES, &ms->kcopyd_client);
if (r) {
How well tested was this?
-
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