[PATCH review for 4.9 16/50] Btrfs: send, fix failure to rename top level inode due to name collision

From: Robbie Ko [ Upstream commit 4dd9920d991745c4a16f53a8f615f706fbe4b3f7 ] Under certain situations, an incremental send operation can fail due to a premature attempt to create a new top level inode (a direct child of the subvolume/snapshot root) whose name collides

[PATCH review for 4.9 16/50] Btrfs: send, fix failure to rename top level inode due to name collision

From: Robbie Ko [ Upstream commit 4dd9920d991745c4a16f53a8f615f706fbe4b3f7 ] Under certain situations, an incremental send operation can fail due to a premature attempt to create a new top level inode (a direct child of the subvolume/snapshot root) whose name collides with another inode that