[Bug 1420584] Re: "error: invalid segment." (with btrfs on LVM on LUKS)
EmanueL Czirai
emanueLczirai at cryptoLab.net
Sat Feb 14 00:39:21 UTC 2015
I've fixed my issue with lvmids mentioned above; it's specific only to
me because I was using a non-standard /boot directory (called /but )
which needed a change in grub2-mkconfig script.
Otherwise, grub is working ok with the above 2 patches. I've also sent
an email to one of the devs(from a git blame commit) linking to this bug
in the hope he will see these patches and apply them. They apply only to
the grub git version, tested with latest commit which is currently:
32cd33bd19348afb77ab849846e0b6d6157ea308
In my case I've yet to figure out why kernel panics(attempted to kill
init) but this is gentoo/initramfs issue and thus non-grub related. Grub
loads them both ok, as far as I can tell.
Cheers, I'm out.
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https://bugs.launchpad.net/bugs/1420584
Title:
"error: invalid segment." (with btrfs on LVM on LUKS)
Status in grub2 package in Ubuntu:
New
Bug description:
This is an attempt to install grub2 on a system which has boot and root partitions inside a LVM which in turn is all inside a LUKS container (details below at the end).
Using grub git version (latest of today Feb 11th 2015, I don't know the commit hash)
The relevant errors are this:
error: invalid segment.
grub2-install: error: disk `lvmid/31WF5i-VxBz-zdr3-CbG5-A37g-tbac-qVYGlO/bu7oYe-uBNK-xWYQ-wIZD-fk1K-fBeb-pSkvNO' not found.
error: invalid segment.
/usr/sbin/grub2-probe: error: disk `lvmid/31WF5i-VxBz-zdr3-CbG5-A37g-tbac-qVYGlO/sKk47H-AmYx-0iXJ-Tb1a-hy3d-tuaf-ly2AVY' not found.
Full details below:
--------
(chroot1) livecd / # grub2-install --force --compress=xz
--target=i386-pc --recheck --debug --locales= --fonts= --boot-
directory=/but --no-rs-codes --modules="part_gpt crypto cryptodisk lvm
btrfs" -- /dev/sda >/tmp/out.txt 2>&1
Installing for i386-pc platform.
grub2-install: info: cannot open `/but/grub/device.map': No such file or directory.
grub2-install: info: compressing `/usr/lib/grub/i386-pc/disk.mod' -> `/but/grub/i386-pc/disk.mod'.
[..snip..]
see attachment for this snipped part, because I got this error(submitting bug):
The description is too long. If you have lots of text to add, attach a file to the bug instead.
[..snip..]
grub2-install: info: drive = -1.
grub2-install: error: disk `lvmid/31WF5i-VxBz-zdr3-CbG5-A37g-tbac-qVYGlO/bu7oYe-uBNK-xWYQ-wIZD-fk1K-fBeb-pSkvNO' not found.
(chroot1) livecd / # grub2-mkconfig -o /but/grub/grub.cfg
>>/tmp/out.txt
Generating grub configuration file ...
Found linux image: /but/kernel-genkernel-x86_64-3.19.0-gentoo
Found initrd image: /but/initramfs-genkernel-x86_64-3.19.0-gentoo
error: invalid segment.
/usr/sbin/grub2-probe: error: disk `lvmid/31WF5i-VxBz-zdr3-CbG5-A37g-tbac-qVYGlO/sKk47H-AmYx-0iXJ-Tb1a-hy3d-tuaf-ly2AVY' not found.
error: invalid segment.
/usr/sbin/grub2-probe: error: disk `lvmid/31WF5i-VxBz-zdr3-CbG5-A37g-tbac-qVYGlO/sKk47H-AmYx-0iXJ-Tb1a-hy3d-tuaf-ly2AVY' not found.
error: invalid segment.
/usr/sbin/grub2-probe: error: disk `lvmid/31WF5i-VxBz-zdr3-CbG5-A37g-tbac-qVYGlO/sKk47H-AmYx-0iXJ-Tb1a-hy3d-tuaf-ly2AVY' not found.
done
(chroot1) livecd / # mount
proc on /proc type proc (rw,nosuid,nodev,noexec,relatime)
udev on /dev type devtmpfs (rw,nosuid,relatime,size=10240k,nr_inodes=1022258,mode=755)
devpts on /dev/pts type devpts (rw,relatime,gid=5,mode=620)
sysfs on /sys type sysfs (rw,nosuid,nodev,noexec,relatime)
tmpfs on /run type tmpfs (rw,nosuid,nodev,relatime,size=818508k,mode=755)
shm on /dev/shm type tmpfs (rw,nosuid,nodev,noexec,relatime)
fusectl on /sys/fs/fuse/connections type fusectl (rw,nosuid,nodev,noexec,relatime)
/dev/mapper/vgall-rootlvol on / type btrfs (rw,relatime,ssd,autodefrag,compress=lzo,datasum,datacow,space_cache,commit=300)
/dev/mapper/vgall-bootlvol on /but type btrfs (rw,relatime,nosuid,nodev,noexec,ssd,autodefrag,compress=lzo,datasum,datacow,space_cache,commit=300)
tmpfs on /tmp type tmpfs (rw,nosuid,relatime,nodev,size=7G,mode=1777)
/tmp on /var/tmp type none (rw,bind,rbind)
tmpfs on /var/tmp/portage type tmpfs (rw,nosuid,relatime,nodev,size=7G,mode=775,uid=250,gid=250)
(chroot1) livecd / # lsblk
NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT
sda 8:0 0 25G 0 disk
├─sda1 8:1 0 2M 0 part
└─sda2 8:2 0 25G 0 part
└─lvm_on_luks_on_sda2 253:0 0 25G 0 crypt
├─vgall-bootlvol 253:1 0 128M 0 lvm /but
└─vgall-rootlvol 253:2 0 24.9G 0 lvm /
sr0 11:0 1 208M 0 rom
loop0 7:0 0 178.3M 1 loop
(chroot1) livecd / # cryptsetup luksDump /dev/sda2 |grep UUID
UUID: b904d6c0-4b05-4c9f-a468-f9242faba2df
(chroot1) livecd / # pvdisplay
--- Physical volume ---
PV Name /dev/disk/by-id/dm-name-lvm_on_luks_on_sda2
VG Name vgall
PV Size 24.99 GiB / not usable 2.00 MiB
Allocatable yes (but full)
PE Size 4.00 MiB
Total PE 6398
Free PE 0
Allocated PE 6398
PV UUID 9qjZyk-gLkH-pVXM-B1d6-NpCn-pHH9-mZCfXb
(chroot1) livecd / # vgdisplay
--- Volume group ---
VG Name vgall
System ID
Format lvm2
Metadata Areas 1
Metadata Sequence No 3
VG Access read/write
VG Status resizable
MAX LV 0
Cur LV 2
Open LV 2
Max PV 0
Cur PV 1
Act PV 1
VG Size 24.99 GiB
PE Size 4.00 MiB
Total PE 6398
Alloc PE / Size 6398 / 24.99 GiB
Free PE / Size 0 / 0
VG UUID 31WF5i-VxBz-zdr3-CbG5-A37g-tbac-qVYGlO
(chroot1) livecd / # lvdisplay
--- Logical volume ---
LV Path /dev/vgall/bootlvol
LV Name bootlvol
VG Name vgall
LV UUID bu7oYe-uBNK-xWYQ-wIZD-fk1K-fBeb-pSkvNO
LV Write Access read/write
LV Creation host, time livecd, 2015-02-10 04:39:58 +0100
LV Status available
# open 1
LV Size 128.00 MiB
Current LE 32
Segments 1
Allocation inherit
Read ahead sectors auto
- currently set to 256
Block device 253:1
--- Logical volume ---
LV Path /dev/vgall/rootlvol
LV Name rootlvol
VG Name vgall
LV UUID sKk47H-AmYx-0iXJ-Tb1a-hy3d-tuaf-ly2AVY
LV Write Access read/write
LV Creation host, time livecd, 2015-02-10 04:40:02 +0100
LV Status available
# open 1
LV Size 24.87 GiB
Current LE 6366
Segments 1
Allocation inherit
Read ahead sectors auto
- currently set to 256
Block device 253:2
(chroot1) livecd / # time FEATURES="-stricter" USE="-themes debug mount" emerge -pvq grub
[ebuild R ] sys-boot/grub-9999-r1 USE="debug device-mapper fonts mount multislot -doc -efiemu -libzfs -nls -sdl -static {-test} -themes -truetype" GRUB_PLATFORMS="pc -coreboot -efi-32 -efi-64 -emu -ieee1275 -loongson -multiboot -qemu -qemu-mips -xen"
(chroot1) livecd / # fdisk -l /dev/sda
Disk /dev/sda: 25 GiB, 26843545600 bytes, 52428800 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disklabel type: gpt
Disk identifier: 5E5F0B83-AE3E-4291-A6C4-35E640505DB8
Device Start End Size Type
/dev/sda1 2048 6143 2M BIOS boot partition
/dev/sda2 6144 52426751 25G Linux filesystem
(chroot1) livecd / # uname -a
Linux livecd 3.16.5-gentoo #1 SMP Thu Dec 4 06:13:19 UTC 2014 x86_64 AMD A6-3400M APU with Radeon(tm) HD Graphics AuthenticAMD GNU/Linux
(chroot1) livecd / # cryptsetup --version
cryptsetup 1.6.6
(chroot1) livecd / # grub2-install --version
grub2-install (GRUB) 2.02~beta2
(chroot1) livecd / # lvm version
LVM version: 2.02.110(2) (2014-08-26)
Library version: 1.02.89 (2014-08-26)
Driver version: 4.27.0
/dev/sda2 is LUKS, then inside it there's LVM (a boot and a root, logical volumes, each of which are btrfs formatter).
tested inside virtualbox, booted from Gentoo's install-
amd64-minimal-20141204.iso , chrooted to a
stage3-amd64-hardened+nomultilib-20150108.tar.bz2
If anyone is adventurous enough, here's roughly all the steps I followed: https://github.com/emanueLczirai/coostomhuston/blob/7f19d290f1cc170fcf2e5eb47238fb788686e3a5/texts/gentoo_vm.wofl
(I think only this step is missing: time emerge -av libgcrypt coreutils glibc )
Note that --force to grub2-install has no effect(in this grub git
version), although version from package grub-2.02_beta2-r7:2 (~amd64)
acts as if --force was given(even though it was not) and both
grub2-install and grub2-mkconfig do not complain, but upon booting it
cannot find kernel file.
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