This is a note to let you know that I've just added the patch titled
Btrfs: send, don't error in the presence of subvols/snapshots
to the 3.14-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
btrfs-send-don-t-error-in-the-presence-of-subvols-snapshots.patch
and it can be found in the queue-3.14 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 1af56070e3ef9477dbc7eba3b9ad7446979c7974 Mon Sep 17 00:00:00 2001
From: Filipe Manana <fdmanana@xxxxxxxxx>
Date: Sun, 25 May 2014 04:49:24 +0100
Subject: Btrfs: send, don't error in the presence of subvols/snapshots
From: Filipe Manana <fdmanana@xxxxxxxxx>
commit 1af56070e3ef9477dbc7eba3b9ad7446979c7974 upstream.
If we are doing an incremental send and the base snapshot has a
directory with name X that doesn't exist anymore in the second
snapshot and a new subvolume/snapshot exists in the second snapshot
that has the same name as the directory (name X), the incremental
send would fail with -ENOENT error. This is because it attempts
to lookup for an inode with a number matching the objectid of a
root, which doesn't exist.
Steps to reproduce:
mkfs.btrfs -f /dev/sdd
mount /dev/sdd /mnt
mkdir /mnt/testdir
btrfs subvolume snapshot -r /mnt /mnt/mysnap1
rmdir /mnt/testdir
btrfs subvolume create /mnt/testdir
btrfs subvolume snapshot -r /mnt /mnt/mysnap2
btrfs send -p /mnt/mysnap1 /mnt/mysnap2 -f /tmp/send.data
A test case for xfstests follows.
Reported-by: Robert White <rwhite@xxxxxxxxx>
Signed-off-by: Filipe David Borba Manana <fdmanana@xxxxxxxxx>
Signed-off-by: Chris Mason <clm@xxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
fs/btrfs/send.c | 4 ++++
1 file changed, 4 insertions(+)
--- a/fs/btrfs/send.c
+++ b/fs/btrfs/send.c
@@ -1589,6 +1589,10 @@ static int lookup_dir_item_inode(struct
goto out;
}
btrfs_dir_item_key_to_cpu(path->nodes[0], di, &key);
+ if (key.type == BTRFS_ROOT_ITEM_KEY) {
+ ret = -ENOENT;
+ goto out;
+ }
*found_inode = key.objectid;
*found_type = btrfs_dir_type(path->nodes[0], di);
Patches currently in stable-queue which might be from fdmanana@xxxxxxxxx are
queue-3.14/btrfs-send-don-t-error-in-the-presence-of-subvols-snapshots.patch
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