Hello! I observe the following issue with btrfs send | btrfs receive in a setup with 2 machines and 3 btrfs file-systems. All machines run Linux 4.18.9. Machine 1 runs btrfs-progs 4.17.1, machine 2 runs btrfs-progs 4.17 (via https://packages.debian.org/stretch-backports/btrfs-progs). 1) Machine 1 takes regular snapshots and sends them to machine 2. btrfs btrfs send ... | ssh user@machine2 "btrfs receive /path1" 2) Machine 2 backups all subvolumes stored at /path1 to a second independent btrfs filesystem. Let /path1/rootsnapshot be the first snapshot stored at /path1 (ie. it has no Parent UUID). Let /path1/incrementalsnapshot be a snapshot that has /path1/rootsnapshot as a parent. Then btrfs send -v /path1/rootsnapshot | btrfs receive /path2 works without issues, but btrfs send -v -p /path1/rootsnapshot /path1/incrementalsnapshot | btrfs receive /path2 fails as follows: ERROR: chown o257-4639416-0 failed: No such file or directory No error is shown in dmesg. /path1 and /path2 denote two independent btrfs filesystems. Note that there was no issue with transferring incrementalsnapshot from machine 1 to machine 2. No error is shown in dmesg. Best regards Leonard
