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authorEric Sandeen <sandeen@redhat.com>2007-02-10 01:46:08 -0800
committerLinus Torvalds <torvalds@woody.linux-foundation.org>2007-02-11 10:51:34 -0800
commitead6596b9e776ac32d82f7d1931d7638e6d4a7bd (patch)
tree32e518737ab4b656cdf573167a6ac6308c4c3aad
parentea9a05a1330053759c02eb2c60547085140a4cbd (diff)
[PATCH] ext4: refuse ro to rw remount of fs with orphan inodes
In the rare case where we have skipped orphan inode processing due to a readonly block device, and the block device subsequently changes back to read-write, disallow a remount,rw transition of the filesystem when we have an unprocessed orphan inodes as this would corrupt the list. Ideally we should process the orphan inode list during the remount, but that's trickier, and this plugs the hole for now. Signed-off-by: Eric Sandeen <sandeen@redhat.com> Cc: "Stephen C. Tweedie" <sct@redhat.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
-rw-r--r--fs/ext4/super.c16
1 files changed, 16 insertions, 0 deletions
diff --git a/fs/ext4/super.c b/fs/ext4/super.c
index 486a641ca71b..463b52b32a0e 100644
--- a/fs/ext4/super.c
+++ b/fs/ext4/super.c
@@ -2419,6 +2419,22 @@ static int ext4_remount (struct super_block * sb, int * flags, char * data)
err = -EROFS;
goto restore_opts;
}
+
+ /*
+ * If we have an unprocessed orphan list hanging
+ * around from a previously readonly bdev mount,
+ * require a full umount/remount for now.
+ */
+ if (es->s_last_orphan) {
+ printk(KERN_WARNING "EXT4-fs: %s: couldn't "
+ "remount RDWR because of unprocessed "
+ "orphan inode list. Please "
+ "umount/remount instead.\n",
+ sb->s_id);
+ err = -EINVAL;
+ goto restore_opts;
+ }
+
/*
* Mounting a RDONLY partition read-write, so reread
* and store the current valid flag. (It may have

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