[PATCH 1/2] xfs_admin: support external log devices

["Darrick J. Wong" <darrick.wong@oracle.com>]

From: Darrick J. Wong <darrick.wong@oracle.com>

Add to xfs_admin the ability to pass external log devices to xfs_db.
This is necessary to make changes on such filesystems.

Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
---
 db/xfs_admin.sh      |   12 ++++++++++--
 man/man8/xfs_admin.8 |   14 ++++++++++++++
 2 files changed, 24 insertions(+), 2 deletions(-)


diff --git a/db/xfs_admin.sh b/db/xfs_admin.sh
index 305ef2b7..bd325da2 100755
--- a/db/xfs_admin.sh
+++ b/db/xfs_admin.sh
@@ -7,7 +7,7 @@
 status=0
 DB_OPTS=""
 REPAIR_OPTS=""
-USAGE="Usage: xfs_admin [-efjlpuV] [-c 0|1] [-L label] [-U uuid] device"
+USAGE="Usage: xfs_admin [-efjlpuV] [-c 0|1] [-L label] [-U uuid] device [logdev]"
 
 while getopts "efjlpuc:L:U:V" c
 do
@@ -33,7 +33,15 @@ done
 set -- extra $@
 shift $OPTIND
 case $# in
-	1)	if [ -n "$DB_OPTS" ]
+	1|2)
+		# Pick up the log device, if present
+		if [ -n "$2" ]; then
+			DB_OPTS=$DB_OPTS" -l '$2'"
+			test -n "$REPAIR_OPTS" && \
+				REPAIR_OPTS=$REPAIR_OPTS" -l '$2'"
+		fi
+
+		if [ -n "$DB_OPTS" ]
 		then
 			eval xfs_db -x -p xfs_admin $DB_OPTS $1
 			status=$?
diff --git a/man/man8/xfs_admin.8 b/man/man8/xfs_admin.8
index 20a114f5..8afc873f 100644
--- a/man/man8/xfs_admin.8
+++ b/man/man8/xfs_admin.8
@@ -15,6 +15,9 @@ xfs_admin \- change parameters of an XFS filesystem
 .I uuid
 ]
 .I device
+[
+.I logdev
+]
 .br
 .B xfs_admin \-V
 .SH DESCRIPTION
@@ -31,6 +34,17 @@ A number of parameters of a mounted filesystem can be examined
 and modified using the
 .BR xfs_growfs (8)
 command.
+.PP
+The optional
+.B logdev
+parameter specifies the device special file where the filesystem's external
+log resides.
+This is required only for filesystems that use an external log.
+See the
+.B mkfs.xfs \-l
+option, and refer to
+.BR xfs (5)
+for a detailed description of the XFS log.
 .SH OPTIONS
 .TP
 .B \-e