* [PATCH v2 0/2] xfs_admin: unify online/offline fs label setting
@ 2019-12-03 2:47 Darrick J. Wong
2019-12-03 2:47 ` [PATCH 1/2] xfs_admin: support external log devices Darrick J. Wong
2019-12-03 2:47 ` [PATCH 2/2] xfs_admin: enable online label getting and setting Darrick J. Wong
0 siblings, 2 replies; 4+ messages in thread
From: Darrick J. Wong @ 2019-12-03 2:47 UTC (permalink / raw)
To: sandeen, darrick.wong; +Cc: linux-xfs
Hi all,
Here are two fixes for the xfs_admin script. The first enables callers
to pass an external log device, because xfs_db requires that to work on
filesystems that do not have an internal log.
The second patch enables xfs_admin to call xfs_io, which is then used to
pass label get and set commands (-l and -L) to the kernel (via xfs_io) if
the filesystem is mounted.
v2: Improve the manpage updates.
This is an extraordinary way to destroy everything. Enjoy!
Comments and questions are, as always, welcome.
--D
^ permalink raw reply [flat|nested] 4+ messages in thread
* [PATCH 1/2] xfs_admin: support external log devices
2019-12-03 2:47 [PATCH v2 0/2] xfs_admin: unify online/offline fs label setting Darrick J. Wong
@ 2019-12-03 2:47 ` Darrick J. Wong
2019-12-03 2:47 ` [PATCH 2/2] xfs_admin: enable online label getting and setting Darrick J. Wong
1 sibling, 0 replies; 4+ messages in thread
From: Darrick J. Wong @ 2019-12-03 2:47 UTC (permalink / raw)
To: sandeen, darrick.wong; +Cc: linux-xfs
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
^ permalink raw reply [flat|nested] 4+ messages in thread
* [PATCH 2/2] xfs_admin: enable online label getting and setting
2019-12-03 2:47 [PATCH v2 0/2] xfs_admin: unify online/offline fs label setting Darrick J. Wong
2019-12-03 2:47 ` [PATCH 1/2] xfs_admin: support external log devices Darrick J. Wong
@ 2019-12-03 2:47 ` Darrick J. Wong
1 sibling, 0 replies; 4+ messages in thread
From: Darrick J. Wong @ 2019-12-03 2:47 UTC (permalink / raw)
To: sandeen, darrick.wong; +Cc: linux-xfs
From: Darrick J. Wong <darrick.wong@oracle.com>
Connect xfs_admin -L to the xfs_io label command so that we can get and
set the label for a live filesystem.
Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
---
db/xfs_admin.sh | 42 ++++++++++++++++++++++++++++++++++++++++--
man/man8/xfs_admin.8 | 4 +++-
2 files changed, 43 insertions(+), 3 deletions(-)
diff --git a/db/xfs_admin.sh b/db/xfs_admin.sh
index bd325da2..d18959bf 100755
--- a/db/xfs_admin.sh
+++ b/db/xfs_admin.sh
@@ -7,8 +7,30 @@
status=0
DB_OPTS=""
REPAIR_OPTS=""
+IO_OPTS=""
USAGE="Usage: xfs_admin [-efjlpuV] [-c 0|1] [-L label] [-U uuid] device [logdev]"
+# Try to find a loop device associated with a file. We only want to return
+# one loopdev (multiple loop devices can attach to a single file) so we grab
+# the last line and return it if it's actually a block device.
+try_find_loop_dev_for_file() {
+ local x="$(losetup -O NAME -j "$1" 2> /dev/null | tail -n 1)"
+ test -b "$x" && echo "$x"
+}
+
+# See if we can find a mount point for the argument.
+find_mntpt_for_arg() {
+ local arg="$1"
+
+ # See if we can map the arg to a loop device
+ local loopdev="$(try_find_loop_dev_for_file "${arg}")"
+ test -n "$loopdev" && arg="$loopdev"
+
+ # If we find a mountpoint for the device, do a live query;
+ # otherwise try reading the fs with xfs_db.
+ findmnt -t xfs -f -n -o TARGET "${arg}" 2> /dev/null
+}
+
while getopts "efjlpuc:L:U:V" c
do
case $c in
@@ -16,8 +38,16 @@ do
e) DB_OPTS=$DB_OPTS" -c 'version extflg'";;
f) DB_OPTS=$DB_OPTS" -f";;
j) DB_OPTS=$DB_OPTS" -c 'version log2'";;
- l) DB_OPTS=$DB_OPTS" -r -c label";;
- L) DB_OPTS=$DB_OPTS" -c 'label "$OPTARG"'";;
+ l) DB_OPTS=$DB_OPTS" -r -c label"
+ IO_OPTS=$IO_OPTS" -r -c label"
+ ;;
+ L) DB_OPTS=$DB_OPTS" -c 'label "$OPTARG"'"
+ if [ "$OPTARG" = "--" ]; then
+ IO_OPTS=$IO_OPTS" -c 'label -c'"
+ else
+ IO_OPTS=$IO_OPTS" -c 'label -s "$OPTARG"'"
+ fi
+ ;;
p) DB_OPTS=$DB_OPTS" -c 'version projid32bit'";;
u) DB_OPTS=$DB_OPTS" -r -c uuid";;
U) DB_OPTS=$DB_OPTS" -c 'uuid "$OPTARG"'";;
@@ -41,6 +71,14 @@ case $# in
REPAIR_OPTS=$REPAIR_OPTS" -l '$2'"
fi
+ # Try making the changes online, if supported
+ if [ -n "$IO_OPTS" ] && mntpt="$(find_mntpt_for_arg "$1")"
+ then
+ eval xfs_io -x -p xfs_admin $IO_OPTS "$mntpt"
+ test "$?" -eq 0 && exit 0
+ fi
+
+ # Otherwise try offline changing
if [ -n "$DB_OPTS" ]
then
eval xfs_db -x -p xfs_admin $DB_OPTS $1
diff --git a/man/man8/xfs_admin.8 b/man/man8/xfs_admin.8
index 8afc873f..220dd803 100644
--- a/man/man8/xfs_admin.8
+++ b/man/man8/xfs_admin.8
@@ -26,7 +26,7 @@ uses the
.BR xfs_db (8)
command to modify various parameters of a filesystem.
.PP
-Devices that are mounted cannot be modified.
+Devices that are mounted cannot be modified, except as noted below.
Administrators must unmount filesystems before
.BR xfs_admin " or " xfs_db (8)
can convert parameters.
@@ -67,6 +67,7 @@ log buffers).
.TP
.B \-l
Print the current filesystem label.
+This command can be run if the filesystem is mounted.
.TP
.B \-p
Enable 32bit project identifier support (PROJID32BIT feature).
@@ -102,6 +103,7 @@ The filesystem label can be cleared using the special "\c
.B \-\-\c
" value for
.IR label .
+This command can be run if the filesystem is mounted.
.TP
.BI \-U " uuid"
Set the UUID of the filesystem to
^ permalink raw reply [flat|nested] 4+ messages in thread
* [PATCH 2/2] xfs_admin: enable online label getting and setting
2019-12-02 17:37 [PATCH 0/2] xfs_admin: unify online/offline fs label setting Darrick J. Wong
@ 2019-12-02 17:37 ` Darrick J. Wong
0 siblings, 0 replies; 4+ messages in thread
From: Darrick J. Wong @ 2019-12-02 17:37 UTC (permalink / raw)
To: sandeen, darrick.wong; +Cc: linux-xfs
From: Darrick J. Wong <darrick.wong@oracle.com>
Connect xfs_admin -L to the xfs_io label command so that we can get and
set the label for a live filesystem.
Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
---
db/xfs_admin.sh | 42 ++++++++++++++++++++++++++++++++++++++++--
1 file changed, 40 insertions(+), 2 deletions(-)
diff --git a/db/xfs_admin.sh b/db/xfs_admin.sh
index bd325da2..d18959bf 100755
--- a/db/xfs_admin.sh
+++ b/db/xfs_admin.sh
@@ -7,8 +7,30 @@
status=0
DB_OPTS=""
REPAIR_OPTS=""
+IO_OPTS=""
USAGE="Usage: xfs_admin [-efjlpuV] [-c 0|1] [-L label] [-U uuid] device [logdev]"
+# Try to find a loop device associated with a file. We only want to return
+# one loopdev (multiple loop devices can attach to a single file) so we grab
+# the last line and return it if it's actually a block device.
+try_find_loop_dev_for_file() {
+ local x="$(losetup -O NAME -j "$1" 2> /dev/null | tail -n 1)"
+ test -b "$x" && echo "$x"
+}
+
+# See if we can find a mount point for the argument.
+find_mntpt_for_arg() {
+ local arg="$1"
+
+ # See if we can map the arg to a loop device
+ local loopdev="$(try_find_loop_dev_for_file "${arg}")"
+ test -n "$loopdev" && arg="$loopdev"
+
+ # If we find a mountpoint for the device, do a live query;
+ # otherwise try reading the fs with xfs_db.
+ findmnt -t xfs -f -n -o TARGET "${arg}" 2> /dev/null
+}
+
while getopts "efjlpuc:L:U:V" c
do
case $c in
@@ -16,8 +38,16 @@ do
e) DB_OPTS=$DB_OPTS" -c 'version extflg'";;
f) DB_OPTS=$DB_OPTS" -f";;
j) DB_OPTS=$DB_OPTS" -c 'version log2'";;
- l) DB_OPTS=$DB_OPTS" -r -c label";;
- L) DB_OPTS=$DB_OPTS" -c 'label "$OPTARG"'";;
+ l) DB_OPTS=$DB_OPTS" -r -c label"
+ IO_OPTS=$IO_OPTS" -r -c label"
+ ;;
+ L) DB_OPTS=$DB_OPTS" -c 'label "$OPTARG"'"
+ if [ "$OPTARG" = "--" ]; then
+ IO_OPTS=$IO_OPTS" -c 'label -c'"
+ else
+ IO_OPTS=$IO_OPTS" -c 'label -s "$OPTARG"'"
+ fi
+ ;;
p) DB_OPTS=$DB_OPTS" -c 'version projid32bit'";;
u) DB_OPTS=$DB_OPTS" -r -c uuid";;
U) DB_OPTS=$DB_OPTS" -c 'uuid "$OPTARG"'";;
@@ -41,6 +71,14 @@ case $# in
REPAIR_OPTS=$REPAIR_OPTS" -l '$2'"
fi
+ # Try making the changes online, if supported
+ if [ -n "$IO_OPTS" ] && mntpt="$(find_mntpt_for_arg "$1")"
+ then
+ eval xfs_io -x -p xfs_admin $IO_OPTS "$mntpt"
+ test "$?" -eq 0 && exit 0
+ fi
+
+ # Otherwise try offline changing
if [ -n "$DB_OPTS" ]
then
eval xfs_db -x -p xfs_admin $DB_OPTS $1
^ permalink raw reply [flat|nested] 4+ messages in thread
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