Bug#331342: lvm2: lvs fails to display snapshot volumes

[Barasz Mihaly]

Package: lvm2
Version: 2.01.14-3
Severity: important


After a recent upgrade lvs and lvdisplay stopped to display snapshot
volumes. Example:

# lvs
  LV   VG   Attr   LSize  Origin Snap%  Move Log Copy% 
  data vg0  -wi-ao 84.00G                              
  home vg0  owi-ao 50.00G                              
#

One can see that "home" is an origin for some snapshot, but can't see
the snapshot volume.

It may be interesting, that the snapshot can be used, it appears in
/dev/vg0:

# ls -l /dev/vg0
total 0
lrwxrwxrwx  1 root root 20 Oct  3 03:32 data -> /dev/mapper/vg0-data
lrwxrwxrwx  1 root root 20 Oct  3 03:32 home -> /dev/mapper/vg0-home
lrwxrwxrwx  1 root root 22 Oct  3 03:32 tegnap -> /dev/mapper/vg0-tegnap
# 
(the one named "tegnap" is the snapshot.)

Snapshots still can be created/removed/used, the only problem that they are
"invisible" now.

I've checked the vanilla versions from
ftp://sources.redhat.com/pub/lvm2/  and neither 2.01.13 nor 2.01.14
works, so the bug is probably in the upstream.
The last version that works for me is 2.01.09.


-- System Information:
Debian Release: testing/unstable
  APT prefers unstable
  APT policy: (500, 'unstable')
Architecture: i386 (i686)
Shell:  /bin/sh linked to /bin/bash
Kernel: Linux 2.6.10-ac12
Locale: LANG=C, LC_CTYPE=hu_HU (charmap=ISO-8859-2)

Versions of packages lvm2 depends on:
ii  debconf [debconf-2.0]        1.4.58      Debian configuration management sy
ii  libc6                        2.3.5-6     GNU C Library: Shared libraries an
ii  libdevmapper1.01             2:1.01.05-1 The Linux Kernel Device Mapper use
ii  libncurses5                  5.4-9       Shared libraries for terminal hand
ii  libreadline5                 5.0-11      GNU readline and history libraries
ii  libselinux1                  1.26-1      SELinux shared libraries
ii  lvm-common                   1.5.20      The Logical Volume Manager for Lin

lvm2 recommends no packages.

-- debconf information:
  lvm2/snapshots: