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Date:   Tue,  9 May 2017 12:12:45 -0400
From:   Jeff Layton <jlayton@...hat.com>
To:     linux-fsdevel@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-btrfs@...r.kernel.org, linux-ext4@...r.kernel.org,
        linux-cifs@...r.kernel.org, linux-nfs@...r.kernel.org,
        linux-mm@...ck.org, jfs-discussion@...ts.sourceforge.net,
        linux-xfs@...r.kernel.org, cluster-devel@...hat.com,
        linux-f2fs-devel@...ts.sourceforge.net,
        v9fs-developer@...ts.sourceforge.net, linux-nilfs@...r.kernel.org,
        linux-block@...r.kernel.org, fstests@...r.kernel.org
Cc:     dhowells@...hat.com, akpm@...ux-foundation.org, hch@...radead.org,
        ross.zwisler@...ux.intel.com, mawilcox@...rosoft.com,
        jack@...e.com, viro@...iv.linux.org.uk, corbet@....net,
        neilb@...e.de, clm@...com, tytso@....edu, axboe@...nel.dk,
        josef@...icpanda.com, hubcap@...ibond.com, rpeterso@...hat.com,
        bo.li.liu@...cle.com
Subject: [xfstests PATCH v2 3/3] btrfs: allow it to use $SCRATCH_LOGDEV

With btrfs, we can't really put the log on a separate device. What we
can do however is mirror the metadata across two devices and put the
data on a single device. When we turn on dmerror then the metadata can
fall back to using the other mirror while the data errors out.

Signed-off-by: Jeff Layton <jlayton@...hat.com>
---
 common/rc | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/common/rc b/common/rc
index 8b815d9c8c33..2084c1f24f30 100644
--- a/common/rc
+++ b/common/rc
@@ -829,6 +829,8 @@ _scratch_mkfs()
 		;;
 	btrfs)
 		mkfs_cmd="$MKFS_BTRFS_PROG"
+		[ "$USE_EXTERNAL" = yes -a ! -z "$SCRATCH_LOGDEV" ] && \
+			mkfs_cmd="$mkfs_cmd -d single -m raid1 $SCRATCH_LOGDEV"
 		mkfs_filter="cat"
 		;;
 	ext2|ext3)
-- 
2.9.3

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