Package: btrfs-progs Version: 4.20.1-1 Severity: important 'btrfs send' stopped working starting with 4.20.1-1.
To reproduce, create a snapshot of / in a directory that is part of the root FS: % btrfs subvolume snapshot -r / /var/backups/daily-20190130T065412Z Create a readonly snapshot of '/' in '/var/backups/daily-20190130T065412Z' 'btrfs send' from btrfs-progs 4.20.1-1 then fails, thus making it impossible to send snapshots to other filesystems: % btrfs send /var/backups/daily-20190130T065412 > /dev/null ERROR: failed to determine mount point for /var/backups/daily-20190130T065412Z: No such file or directory This bug has been reported upstream here: https://github.com/kdave/btrfs-progs/issues/162 There seems to be a patch available here: https://github.com/kdave/btrfs-progs/issues/162#issuecomment-458320281 -- System Information: Debian Release: buster/sid APT prefers unstable-debug APT policy: (500, 'unstable-debug'), (500, 'unstable'), (500, 'testing') Architecture: amd64 (x86_64) Kernel: Linux 4.19.0-2-amd64 (SMP w/4 CPU cores) Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8), LANGUAGE=en_US:en (charmap=UTF-8) Shell: /bin/sh linked to /bin/dash Init: systemd (via /run/systemd/system) LSM: AppArmor: enabled Versions of packages btrfs-progs depends on: ii libblkid1 2.33.1-0.1 ii libc6 2.28-5 ii liblzo2-2 2.10-0.1 ii libuuid1 2.33.1-0.1 ii libzstd1 1.3.8+dfsg-3 ii zlib1g 1:1.2.11.dfsg-1 btrfs-progs recommends no packages. Versions of packages btrfs-progs suggests: pn duperemove <none> -- no debconf information
