Commit 94aebfb2 authored Sep 20, 2013 by Josef Bacik Committed by Chris Mason Sep 21, 2013

Btrfs: create the uuid tree on remount rw

Users have been complaining of the uuid tree stuff warning that there is no uuid
root when trying to do snapshot operations. This is because if you mount -o ro
we will not create the uuid tree. But then if you mount -o rw,remount we will
still not create it and then any subsequent snapshot/subvol operations you try
to do will fail gloriously. Fix this by creating the uuid_root on remount rw if
it was not already there. Thanks,

Signed-off-by: Josef Bacik <jbacik@fusionio.com>
Signed-off-by: Chris Mason <chris.mason@fusionio.com>

parent cbf8b8ca

fs/btrfs/super.c

+10 −0

Original line number	Diff line number	Diff line
		@@ -1383,6 +1383,16 @@ static int btrfs_remount(struct super_block sb, int flags, char *data)
		pr_warn("btrfs: failed to resume dev_replace\n");
		goto restore;
		}

		if (!fs_info->uuid_root) {
		pr_info("btrfs: creating UUID tree\n");
		ret = btrfs_create_uuid_tree(fs_info);
		if (ret) {
		pr_warn("btrfs: failed to create the uuid tree"
		"%d\n", ret);
		goto restore;
		}
		}
		sb->s_flags &= ~MS_RDONLY;
		}
		out:

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