XFS add more configurations in /sys/fs/xfs recently. For use
them, this patch add some common functions for:
1. "require" a file/dir in /sys/fs.
2. write a file in /sys/fs.
For common use, these functions can be used by other filesystems.
Signed-off-by: Zorro Lang <zlang@xxxxxxxxxx>
---
common/rc | 81 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
1 file changed, 81 insertions(+)
diff --git a/common/rc b/common/rc
index 51092a0..9935f08 100644
--- a/common/rc
+++ b/common/rc
@@ -3556,6 +3556,87 @@ run_fsx()
fi
}
+_require_sys_fs()
+{
+ local dev=$1
+ local target=$2
+ local dname=""
+
+ if [ ! -b "$dev" -o -z "$target" ];then
+ echo "Usage: _require_sys_fs <device> <target_need_exist>"
+ exit 1
+ fi
+
+ dname=$(basename $(readlink -f $dev))
+ _mkfs_dev $dev > /dev/null 2>&1
+ _mount -t $FSTYP `_common_dev_mount_options` $dev $SCRATCH_MNT
+ if [ ! -e /sys/fs/${FSTYP}/${dname}/$target ];then
+ umount $SCRATCH_MNT
+ _notrun "/sys/fs/${FSTYP}/${dname}/$target: No such file or directory"
+ fi
+ umount $SCRATCH_MNT
+}
+
+_require_scratch_sys_fs()
+{
+ local target=$1
+ local dname=""
+
+ if [ ! -b "$SCRATCH_DEV" -o -z "$target" ];then
+ echo "Usage: _require_scratch_sys_fs <target_need_exist>"
+ exit 1
+ fi
+
+ dname=$(basename $(readlink -f $SCRATCH_DEV))
+ _scratch_mkfs > /dev/null 2>&1
+ _scratch_mount
+ if [ ! -e /sys/fs/${FSTYP}/${dname}/$target ];then
+ _scratch_unmount
+ _notrun "/sys/fs/${FSTYP}/${dname}/$target: No such file or directory"
+ fi
+ _scratch_unmount
+}
+
+_set_sys_fs_param()
+{
+ local dev=$1
+ shift
+ local target=$1
+ shift
+ local content="$*"
+
+ if [ ! -b "$dev" -o -z "$target" -o -z "$content" ];then
+ echo "Usage: _set_sys_fs_param <mounted_device> <target> <content>"
+ exit 1
+ fi
+ local dname=$(basename $(readlink -f $dev))
+ echo "$content" > /sys/fs/${FSTYP}/${dname}/$target
+}
+
+_enable_xfs_fail_at_unmount()
+{
+ local dev=$1
+
+ if [ ! -b "$dev" -o "$FSTYP" != "xfs" ];then
+ echo "Usage: _enable_xfs_fail_at_unmount <mounted_XFS_device>"
+ exit 1
+ fi
+
+ _set_sys_fs_param $dev error/fail_at_unmount 1
+}
+
+_disable_xfs_fail_at_unmount()
+{
+ local dev=$1
+
+ if [ ! -b "$dev" -o "$FSTYP" != "xfs" ];then
+ echo "Usage: _enable_xfs_fail_at_unmount <mounted_XFS_device>"
+ exit 1
+ fi
+
+ _set_sys_fs_param $dev error/fail_at_unmount 0
+}
+
init_rc
################################################################################
--
2.5.5
--
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