Commit ea9a05a1 authored by Eric Sandeen's avatar Eric Sandeen Committed by Linus Torvalds
Browse files

[PATCH] ext3: 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: default avatarEric Sandeen <sandeen@redhat.com>
Cc: "Stephen C. Tweedie" <sct@redhat.com>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
parent bfb58478
......@@ -2344,6 +2344,22 @@ static int ext3_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 "EXT3-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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