I am installing Gentoo Linux on my machine and I'm running into LVM
problems. The installer CD is 2.6 kernel based, but I am installing a
2.4 kernel based system. Gentoo has an install profile for this to
prevent programs and libraries that have a dependency on 2.6 kernel
headers from being installed when a 2.4 profile is being used.
As part of the install process, I created an LVM2 volume group
containing LVs for /, /usr, /var, /opt, and /home. I created
filesystems on these LVs and performed the installation no problem. I
also configured and compiled the kernel, which is a 2.4.32 based kernel
with LVM2 backported into it by the Gentoo developer team.
I created the initrd which is based on an initrd I created myself and
have been using successfully on 2.4 and 2.6 based kernels. It contains
the LVM tools and libraries, along with disk drivers and the
device-mapper driver.
When I run vgscan, it finds the volume group no problem. However, when
I run 'vgchange -ay <vgname>', I see three problems.
1. There are entries in /dev/mapper/<vgname>-<lvname>, but no symlinks
in the form /dev/<vgname>/<lvname> --> /dev/mapper/<vgname>/<lvname>. I
run 'lvm vgmknodes' and it remedies this.
2. I see five complaints from 'vgchange -ay <vgname>' (one for each LV)
as follows:
on stderr: device-mapper: table ioctl failed: Invalid argument
on console (from dm-mod driver): device-mapper: one of name or uuid must
be supplied, cmd (12)
I ran vgchange under strace and here is the following snippet:
open("/dev/mapper/control", O_RDWR|O_LARGEFILE) = 9
ioctl(9, DM_DEV_STATUS, 0x8109958) = -1 ENXIO (No such device or
address)
ioctl(9, DM_DEV_STATUS, 0x8109958) = -1 ENXIO (No such device or
address)
ioctl(9, DM_DEV_STATUS, 0x8109958) = -1 ENXIO (No such device or
address)
mlockall(MCL_CURRENT|MCL_FUTURE) = 0
brk(0x8936000) = 0x8936000
brk(0x8b1e000) = 0x8b1e000
getpriority(PRIO_PROCESS, 0) = 20
setpriority(PRIO_PROCESS, 0, -18) = 0
ioctl(9, DM_DEV_STATUS, 0x8109958) = -1 ENXIO (No such device or
address)
ioctl(9, DM_DEV_STATUS, 0x8109958) = -1 ENXIO (No such device or
address)
ioctl(9, DM_DEV_STATUS, 0x8109958) = -1 ENXIO (No such device or
address)
ioctl(9, DM_DEV_STATUS, 0x8109958) = -1 ENXIO (No such device or
address)
ioctl(9, DM_DEV_STATUS, 0x8109958) = -1 ENXIO (No such device or
address)
ioctl(9, DM_DEV_STATUS, 0x8109958) = -1 ENXIO (No such device or
address)
ioctl(9, DM_DEV_STATUS, 0x8109958) = -1 ENXIO (No such device or
address)
ioctl(9, DM_DEV_STATUS, 0x8109958) = -1 ENXIO (No such device or
address)
ioctl(9, DM_DEV_STATUS, 0x8109958) = -1 ENXIO (No such device or
address)
stat64("/dev/ide/host0/bus0/target0/lun0/part10", {st_mode=S_IFBLK|0600,
st_rdev=makedev(3, 10), ...}) = 0
stat64("/dev/ide/host0/bus0/target0/lun0/part11", {st_mode=S_IFBLK|0600,
st_rdev=makedev(3, 11), ...}) = 0
stat64("/dev/ide/host0/bus0/target0/lun0/part12", {st_mode=S_IFBLK|0600,
st_rdev=makedev(3, 12), ...}) = 0
ioctl(9, DM_DEV_CREATE, 0x8109958) = 0
ioctl(9, DM_TABLE_STATUS, 0x8109958) = -1 EINVAL (Invalid argument)
write(2, " ", 2) = 2
write(2, "device-mapper: table ioctl faile"..., 51) = 51
write(2, "\n", 1) = 1
3. When I try to mount the filesystem in that LV, it fails. I tried
with different filesystem types and it's the same result. From within
the 2.4 kernel based initrd, it fails. If I reboot into the 2.6 kernel
based installer environment, no problem.
This looks like an incompatibility between the lvm2 and/or device-mapper
library code and the kernel device-mapper code. Here are the versions
installed in the install environment (the one that works):
lvm> version
LVM version: 2.02.05 (2006-04-21)
Library version: 1.02.03 (2006-02-08)
Driver version: 4.4.0
In the initrd, the only thing different would be the driver version.
Later today I will have access to the machine again and I can run the
lvm version command there to see what the driver version is. In the
meantime, I am looking at the kernel sources and I don't see anything
obvious in the driver/md directory.
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