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authorFilipe Manana <fdmanana@gmail.com>2014-05-25 04:49:24 +0100
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2014-06-30 20:14:03 -0700
commit1a7fc2e61a38aeab711e7d74adab235a7cf98219 (patch)
tree8b74be9e1344760bb42ef0d032701205db45efb4
parent1b524a36f1d78a8571071c611dcdeb38e656f8a6 (diff)
Btrfs: send, don't error in the presence of subvols/snapshots
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@pobox.com> Signed-off-by: Filipe David Borba Manana <fdmanana@gmail.com> Signed-off-by: Chris Mason <clm@fb.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
-rw-r--r--fs/btrfs/send.c4
1 files changed, 4 insertions, 0 deletions
diff --git a/fs/btrfs/send.c b/fs/btrfs/send.c
index 3a5b83ae605e..4cd68cb1d710 100644
--- a/fs/btrfs/send.c
+++ b/fs/btrfs/send.c
@@ -1628,6 +1628,10 @@ static int lookup_dir_item_inode(struct btrfs_root *root,
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);