Bug 330375

Summary:	sys-fs/lvm2-2.02.67-r2 breaks under kernel 2.6.32-hardened-r9
Product:	Gentoo Linux	Reporter:	Paul Dodd <paul.dodd>
Component:	Current packages	Assignee:	Robin Johnson <robbat2>
Status:	RESOLVED FIXED
Severity:	major	CC:	agk, cardoe, prajnoha
Priority:	High
Version:	unspecified
Hardware:	All
OS:	Linux
Whiteboard:
Package list:		Runtime testing required:	---

Description Paul Dodd 2010-07-29 15:30:19 UTC

After updating sw & config files
   dev-python:setuptools-0.6.13
   sys-fs:cryptsetup-1.1.2
   sys-fs:lvm2-2.02.67-r2
   sys-fs:udev-151-r4
   sys-libs:cracklib-2.8.16
   sys-libs:timezone-data-2010j
the /etc/init.d/lvm script failed
with
   Setting up the Logical Volume Manager ...
   Failed to create notification semaphore: Function not implemented
   Unable to resume vg2-jail (254:0)
   :
   Failed to setup the LVM
   ERROR: LVM failed to start

As a workaround I masked sys-fs/lvm2-2.02.67-r2 in /etc/portage/package.mask/lvm2 and downgraded to sys-fs/lvm2-2.02.56-r2 .

sys-fs/lvm2-2.02.56-r2 works fine with kernel 2.6.28-hardened-r9.

Comment 1 Paul Dodd 2010-07-30 08:55:13 UTC

The problem was resolved by setting CONFIG_SYSVIPC=y in the kernel configuration with the menuconfig for kernel 2.6.32-hardened-r9 (in kernel 2.6.28-hardened-r9 CONFIG_SYSVIPC was not set.).

Changing /etc/lvm/lvm.conf to get more info:
<     verbose = 3
<     syslog = 0
<     file = "/lvm2.log"
<     level = 7
<     command_names = 1
<     activation = 1
produced
:
ioctl/libdm-iface.c:1888 lvchange  dm info  S7RSdRl0pzR3xkJF3i4hvvJQ65U0IioefEVf
MVCZBGABHPhoJm4o6JVgwkX4AUK2-cow OF   [16384]
ioctl/libdm-iface.c:1888 lvchange  dm info   (254:6) OF   [16384]
libdm-deptree.c:949 lvchange  Removing vg-opt (254:6)
libdm-common.c:1130 lvchange  Failed to create notification semaphore: Function
not implemented
libdm-common.c:1197 lvchange  <backtrace>
libdm-deptree.c:1165 lvchange  Unable to deactivate vg-opt (254:6)
:

libdm-common.c @ line 1110:
		if (base_cookie && (gen_semid = semget((key_t) gen_cookie,
				    1, 0600 | IPC_CREAT | IPC_EXCL)) < 0) {
seems to depend on SYSVIPC?

The documentation and ELOG make no mention of this.

Comment 2 Robin Johnson archtester

2010-07-31 19:16:33 UTC

agk:
Is CONFIG_SYSVIPC required now? If so, I'll add in a check to the ebuild.
Can you add in a check/warning for it at runtime as well?

Comment 3 Alasdair Kergon 2010-07-31 19:24:38 UTC

The udev code requires semaphores...

Comment 4 Alasdair Kergon 2010-07-31 19:25:34 UTC

Peter - see comment #2

Comment 5 Peter Rajnoha 2010-08-03 08:22:36 UTC

(In reply to comment #2)
> Can you add in a check/warning for it at runtime as well?

OK, I've added the check. If there's no SYSVIPC/semaphore support and libdevmapper is configured with "--enable-udev_sync", a warning message is issued and the udev synchronisation code is automatically disabled in runtime.

http://sourceware.org/git/?p=lvm2.git;a=commit;h=d33d0b01bf102630b7e25fb4cab9ac3d9f3152fe

Comment 6 Robin Johnson archtester

2010-08-03 18:01:17 UTC

Warning added to all ebuilds >= 2.02.67. Thanks for the warning in LVM2 as well.