[PATCH] device-mapper: dm-raid1: Limit bios to size of mirror region

From: Alasdair G Kergon (agk_at_redhat.com)
Date: 06/30/05

  • Next message: David Gómez: "Problem with inotify" 
    Date:	Thu, 30 Jun 2005 19:19:31 +0100
To: Andrew Morton <akpm@osdl.org>

    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/

  • Next message: David Gómez: "Problem with inotify"