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[Bug 1042551] New: os-prober + KVM on host kills btrfs in clients
  • From: bugzilla_noreply@xxxxxxxxxx
  • Date: Sun, 04 Jun 2017 11:14:39 +0000
  • Message-id: <bug-1042551-21960@http.bugzilla.suse.com/>
http://bugzilla.suse.com/show_bug.cgi?id=1042551


Bug ID: 1042551
Summary: os-prober + KVM on host kills btrfs in clients
Classification: openSUSE
Product: openSUSE Distribution
Version: Leap 42.2
Hardware: Other
OS: Other
Status: NEW
Severity: Critical
Priority: P5 - None
Component: Basesystem
Assignee: bnc-team-screening@xxxxxxxxxxxxxxxxxxxxxx
Reporter: wagner-thomas@xxxxxx
QA Contact: qa-bugs@xxxxxxx
Found By: ---
Blocker: ---

Hi!

I have Leap 42.2 as KVM host with clients also running Leap 42.2
On the host I use LVM and prepare logical partition (create partitions, format
them and populate them with data).
Then I assign these logical partitions the clients as block devices (on the
host the partition is not mounted any more after assignment).
Using ext4, this setup works well. Using btrfs it works until os-prober is
launched (IMHO due to kernel or grub update) on the host.
os-prober tries to mount all btrfs partitions regardless if they are already
mount in a client. This destroys the btrfs filesystem.

Jun 03 16:55:31 x11sae-f os-prober[25914]: debug: btrfs volume
uuid=02bd7410-fa4e-4164-84a5-6a7c500d0a52
partition=/dev/mapper/system-apache_wwwdata
Jun 03 16:55:31 x11sae-f os-prober[25915]: debug: running
/usr/lib/os-probes/50mounted-tests on btrfs /dev/mapper/system-apache_wwwdata
Jun 03 16:55:31 x11sae-f 50mounted-tests[25919]: debug: begin btrfs processing
for 02bd7410-fa4e-4164-84a5-6a7c500d0a52
Jun 03 16:55:31 x11sae-f kernel: BTRFS info (device dm-13): disk space caching
is enabled
Jun 03 16:55:31 x11sae-f kernel: BTRFS error (device dm-13): parent transid
verify failed on 205856768 wanted 4412 found 4418
Jun 03 16:55:31 x11sae-f kernel: BTRFS error (device dm-13): parent transid
verify failed on 205856768 wanted 4412 found 4418
Jun 03 16:55:31 x11sae-f kernel: BTRFS: open_ctree failed
Jun 03 16:55:31 x11sae-f 50mounted-tests[25942]: warning: cannot mount btrfs
volume 02bd7410-fa4e-4164-84a5-6a7c500d0a52, exiting

S.M.A.R.T. shows no problems.

best regards

Thomas

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