A recently change enforces there is only one access point to each subvolume. The first directory entry (the one added when the subvolume/snapshot was created) is treated as valid access point, all other subvolume links are linked to dummy empty directories. The dummy directories are temporary inodes that only in memory, so we can not rename file into them. Signed-off-by: Yan Zheng <zheng.yan@xxxxxxxxxx> --- diff -urp 1/fs/btrfs/inode.c 2/fs/btrfs/inode.c --- 1/fs/btrfs/inode.c 2009-09-23 05:49:42.007477065 +0800 +++ 2/fs/btrfs/inode.c 2009-09-23 09:46:22.451357089 +0800 @@ -5057,6 +5057,9 @@ static int btrfs_rename(struct inode *ol u64 root_objectid; int ret; + if (new_dir->i_ino == BTRFS_EMPTY_SUBVOL_DIR_OBJECTID) + return -EPERM; + /* we only allow rename subvolume link between subvolumes */ if (old_inode->i_ino != BTRFS_FIRST_FREE_OBJECTID && root != dest) return -EXDEV; -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
