I tested the proposed package and it works as expected.
root@t-unsubsidized-piper:~# lsb_release -rd
Description: Ubuntu 14.04.5 LTS
Release: 14.04
root@t-unsubsidized-piper:~# uname -r
3.13.0-137-generic
First, I confirmed it still fails on 3.12-1ubuntu0.1
root@t-unsubsidized-piper:~# truncate -s 1G testloop.img
root@t-unsubsidized-piper:~# losetup /dev/loop0 testloop.img
root@t-unsubsidized-piper:~# mkfs.ext4 /dev/loop0
mke2fs 1.42.9 (4-Feb-2014)
Discarding device blocks: done
Filesystem label=
OS type: Linux
Block size=4096 (log=2)
Fragment size=4096 (log=2)
Stride=0 blocks, Stripe width=0 blocks
65536 inodes, 262144 blocks
13107 blocks (5.00%) reserved for the super user
First data block=0
Maximum filesystem blocks=268435456
8 block groups
32768 blocks per group, 32768 fragments per group
8192 inodes per group
Superblock backups stored on blocks:
32768, 98304, 163840, 229376
Allocating group tables: done
Writing inode tables: done
Creating journal (8192 blocks): done
Writing superblocks and filesystem accounting information: done
root@t-unsubsidized-piper:~# mount /dev/loop0 /mnt
root@t-unsubsidized-piper:~# rm testloop.img
root@t-unsubsidized-piper:~# mkfs.btrfs --force /dev/vdb
Error: error checking /dev/vdb mount status
root@t-unsubsidized-piper:~# echo $?
1
Next I added trusty-proposed and updated
root@t-unsubsidized-piper:~# apt-cache policy btrfs-tools
btrfs-tools:
Installed: 3.12-1ubuntu0.1
Candidate: 3.12-1ubuntu0.2
Version table:
3.12-1ubuntu0.2 0
500 http://nova.clouds.archive.ubuntu.com/ubuntu/ trusty-proposed/main
amd64 Packages
*** 3.12-1ubuntu0.1 0
500 http://nova.clouds.archive.ubuntu.com/ubuntu/ trusty-updates/main
amd64 Packages
100 /var/lib/dpkg/status
3.12-1 0
500 http://nova.clouds.archive.ubuntu.com/ubuntu/ trusty/main amd64
Packages
After installing the upgrade, I repeated the mkfs.btrfs command, but
this time it succeeds
# sudo apt install btrfs-tools
sudo: unable to resolve host t-unsubsidized-piper
Reading package lists... Done
Building dependency tree
Reading state information... Done
The following packages will be upgraded:
btrfs-tools
1 upgraded, 0 newly installed, 0 to remove and 7 not upgraded.
Need to get 332 kB of archives.
After this operation, 0 B of additional disk space will be used.
Get:1 http://nova.clouds.archive.ubuntu.com/ubuntu/ trusty-proposed/main
btrfs-tools amd64 3.12-1ubuntu0.2 [332 kB]
Fetched 332 kB in 0s (827 kB/s)
(Reading database ... 51345 files and directories currently installed.)
Preparing to unpack .../btrfs-tools_3.12-1ubuntu0.2_amd64.deb ...
Unpacking btrfs-tools (3.12-1ubuntu0.2) over (3.12-1ubuntu0.1) ...
Processing triggers for man-db (2.6.7.1-1ubuntu1) ...
Setting up btrfs-tools (3.12-1ubuntu0.2) ...
update-initramfs: deferring update (trigger activated)
Processing triggers for initramfs-tools (0.103ubuntu4.10) ...
update-initramfs: Generating /boot/initrd.img-3.13.0-137-generic
Processing triggers for libc-bin (2.19-0ubuntu6.13) ...
root@t-unsubsidized-piper:~# mkfs.btrfs --force /dev/vdb
WARNING! - Btrfs v3.12 IS EXPERIMENTAL
WARNING! - see http://btrfs.wiki.kernel.org before using
Turning ON incompat feature 'extref': increased hardlink limit per file to 65536
fs created label (null) on /dev/vdb
nodesize 16384 leafsize 16384 sectorsize 4096 size 40.00GiB
Btrfs v3.12
root@t-unsubsidized-piper:~# echo $?
0
** Tags removed: verification-needed-trusty
** Tags added: verification-done-trusty
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https://bugs.launchpad.net/bugs/1735046
Title:
mkfs.btrfs error checking mount status of loop device backing_file
To manage notifications about this bug go to:
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