Messages in this thread Patch in this message | | | Date | Thu, 30 Jun 2005 19:19:31 +0100 | From | Alasdair G Kergon <> | Subject | [PATCH] device-mapper: dm-raid1: Limit bios to size of mirror region |
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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>
--- 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) { - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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