Package: btrfs-tools
Version: 3.12-1
Severity: normal
Dear Maintainer,
I'm not quite sure if this is expected behaviour or not. In a few words, for
send/receive operations, I can't use as parent a sub that was sent to
another filesystem and then re-sent to yet another filesystem.
The following script illustrates that. The expected behaviour in my opinion
would be to
end up with mnt/2 and mnt/3 being identical (both having subvRO1 and subvRO2).
#!/bin/bash
mkdir bugtest
cd bugtest
for i in 1 2 3; do
mkdir -p mnt/$i
truncate -s 4G mnt/$i.img
mkfs.btrfs mnt/$i.img
mount -o loop mnt/$i.img mnt/$i
done
btrfs sub create mnt/1/subv
date > mnt/1/subv/fileA
btrfs sub snap -r mnt/1/subv mnt/1/subvRO1
date > mnt/1/subv/fileB
btrfs sub snap -r mnt/1/subv mnt/1/subvRO2
# Sending the subvRO1 subvolume from 1 to 2 and then from 2 to 3
btrfs send mnt/1/subvRO1 | btrfs receive mnt/2
btrfs send mnt/2/subvRO1 | btrfs receive mnt/3
# works ok
btrfs send -p mnt/1/subvRO1 mnt/1/subvRO2 | btrfs receive mnt/2
# fails - why? mnt/3 received the parent subvRO1 indirectly via mnt/2
btrfs send -p mnt/1/subvRO1 mnt/1/subvRO2 | btrfs receive mnt/3
cd ..
umount bugtest/mnt/{1,2,3}
rm -rf bugtest/
-- System Information:
Debian Release: jessie/sid
APT prefers testing
APT policy: (500, 'testing'), (1, 'experimental')
Architecture: amd64 (x86_64)
Foreign Architectures: i386
Kernel: Linux 3.13-1-amd64 (SMP w/2 CPU cores)
Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash
Versions of packages btrfs-tools depends on:
ii e2fslibs 1.42.9-3
ii libblkid1 2.20.1-5.6
ii libc6 2.18-4
ii libcomerr2 1.42.9-3
ii liblzo2-2 2.06-1.2
ii libuuid1 2.20.1-5.6
ii zlib1g 1:1.2.8.dfsg-1
btrfs-tools recommends no packages.
btrfs-tools suggests no packages.
-- no debconf information
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