From: Eric Sandeen <sandeen@sandeen.net>
Date: Tue, 10 Feb 2009 20:41:51 +0000 (-0600)
Subject: allow xfs_freeze to freeze "foreign" filesystems
X-Git-Tag: v3.0.1~16
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=cd67dabbce2a01ab7f3da2effce3a252ae25248a;p=thirdparty%2Fxfsprogs-dev.git

allow xfs_freeze to freeze "foreign" filesystems

Now that the freeze ioctl has been elevated to the VFS,
let's let xfs_io and xfs_freeze freeze other filesystems
as well - add the CMD_FOREIGN_OK flag to freeze & thaw.

I think the worst that will happen on older kernels is that
the command will fail with ENOSYS or EINVAL....

Signed-off-by: Eric Sandeen <sandeen@sandeen.net>
Reviewed-by: Christoph Hellwig <hch@lst.de>
---

diff --git a/io/freeze.c b/io/freeze.c
index 334b0cf7f..08f4d47f9 100644
--- a/io/freeze.c
+++ b/io/freeze.c
@@ -66,14 +66,14 @@ freeze_init(void)
 	freeze_cmd.cfunc = freeze_f;
 	freeze_cmd.argmin = 0;
 	freeze_cmd.argmax = 0;
-	freeze_cmd.flags = CMD_NOMAP_OK;
+	freeze_cmd.flags = CMD_NOMAP_OK | CMD_FOREIGN_OK;
 	freeze_cmd.oneline = _("freeze filesystem of current file");
 
 	thaw_cmd.name = _("thaw");
 	thaw_cmd.cfunc = thaw_f;
 	thaw_cmd.argmin = 0;
 	thaw_cmd.argmax = 0;
-	thaw_cmd.flags = CMD_NOMAP_OK;
+	thaw_cmd.flags = CMD_NOMAP_OK | CMD_FOREIGN_OK;
 	thaw_cmd.oneline = _("unfreeze filesystem of current file");
 
 	if (expert) {
diff --git a/io/xfs_freeze.sh b/io/xfs_freeze.sh
index 0aeeae650..45e20d27c 100644
--- a/io/xfs_freeze.sh
+++ b/io/xfs_freeze.sh
@@ -33,11 +33,11 @@ if [ "$1" = "" ]; then
 fi
 
 if $FREEZE ; then
-	$DIRNAME/xfs_io -r -p xfs_freeze -x -c "freeze" "$1"
+	$DIRNAME/xfs_io -F -r -p xfs_freeze -x -c "freeze" "$1"
 	status=$?
 	[ $status -ne 0 ] && exit $status
 elif $THAW ; then
-	$DIRNAME/xfs_io -r -p xfs_freeze -x -c "thaw" "$1"
+	$DIRNAME/xfs_io -F -r -p xfs_freeze -x -c "thaw" "$1"
 	status=$?
 	[ $status -ne 0 ] && exit $status
 else
diff --git a/man/man8/xfs_freeze.8 b/man/man8/xfs_freeze.8
index ef5d1ec9f..97c791199 100644
--- a/man/man8/xfs_freeze.8
+++ b/man/man8/xfs_freeze.8
@@ -61,6 +61,10 @@ being mounted.
 The XFS
 .B nouuid
 mount option can be used to circumvent this issue.
+.PP
+In Linux kernel version 2.6.29, the interface which XFS uses to freeze
+and unfreeze was elevated to the VFS, so that this tool can now be
+used on many other Linux filesystems.
 .SH SEE ALSO
 .BR xfs (5),
 .BR lvm (8),