Fstab & mtab !

Message

CooSee · Post by **CooSee** » Mon Dec 10, 2007 1:56 am

hello,

fresh installed GenToo

everything worked fine, but i just wondering why i get this:

df :

rootfs 68354452 8713396 59641056 13% / < ---

/dev/root 68354452 8713396 59641056 13% / < --

udev 10240 168 10072 2% /dev
shm 262144 0 262144 0% /dev/shm
none 1024 68 956 7% /lib/rc/init.d
/dev/sda3 90595756 23883392 66712364 27% /AllMiXeD

=====

fstab :

/dev/sdb1 /boot reiserfs noauto,noatime 1 2
/dev/sdb3 / reiserfs noatime 0 1
/dev/sdb2 none swap sw 0 0
/dev/sda3 /AllMiXeD reiserfs noatime 0 2
/dev/sdc /mnt/cdrom auto noauto,ro 0 0

none /proc proc defaults 0 0

shm /dev/shm tmpfs size=256m,nodev,nosuid,noexec 0 0

=====

mtab :

rootfs / rootfs rw 0 0 < ----

/dev/root / reiserfs rw,noatime 0 0
none /proc proc rw 0 0
sysfs /sys sysfs rw,nosuid,nodev,noexec 0 0
udev /dev tmpfs rw,nosuid 0 0
none /dev/pts devpts rw,nosuid,noexec 0 0
shm /dev/shm tmpfs rw,nosuid,nodev,noexec 0 0
none /lib/rc/init.d tmpfs rw,nosuid,nodev,noexec 0 0
/dev/sda3 /AllMiXeD reiserfs rw,noatime 0 0
usbfs /proc/bus/usb usbfs rw,noexec,nosuid,devmode=0664,devgid=85 0 0
nfsd /proc/fs/nfsd nfsd rw,noexec,nosuid,nodev 0 0
securityfs /sys/kernel/security securityfs rw,noexec,nosuid,nodev 0 0

====

never see this ' rootfs ' before

CooSee ' Ya

padoor · Post by **padoor** » Mon Dec 10, 2007 2:15 am

Code: Select all

localhost ramaswamy # df
Filesystem           1K-blocks      Used Available Use% Mounted on
/dev/hda10            23702964  12215064  10283832  55% /
udev                     10240       168     10072   2% /dev
shm                     256528         0    256528   0% /dev/shm
/dev/hda5              7800324   2342004   5458320  31% /pubdata
/dev/hda1              4874192   4471408    402784  92% /mnt/hda1
/dev/hda6             19020928   7556612  11464316  40% /mnt/hda6

Code: Select all

localhost ramaswamy # cat /etc/mtab
/dev/hda10 / ext3 rw,noatime 0 0
proc /proc proc rw 0 0
sysfs /sys sysfs rw,nosuid,nodev,noexec 0 0
udev /dev tmpfs rw,nosuid 0 0
devpts /dev/pts devpts rw,nosuid,noexec 0 0
shm /dev/shm tmpfs rw,noexec,nosuid,nodev 0 0
/dev/hda5 /pubdata vfat rw,nosuid,nodev,umask=0 0 0
/dev/hda1 /mnt/hda1 vfat rw,nosuid,nodev,umask=0 0 0
/dev/hda6 /mnt/hda6 fuseblk rw,nosuid,nodev,allow_other,blksize=4096 0 0
usbfs /proc/bus/usb usbfs rw,noexec,nosuid,devmode=0664,devgid=85 0 0

Code: Select all

localhost ramaswamy # cat /etc/fstab
# /etc/fstab: static file system information.
#
# noatime turns off atimes for increased performance (atimes normally aren't
# needed; notail increases performance of ReiserFS (at the expense of storage
# efficiency).  It's safe to drop the noatime options if you want and to
# switch between notail / tail freely.
#
# The root filesystem should have a pass number of either 0 or 1.
# All other filesystems should have a pass number of 0 or greater than 1.
#
# See the manpage fstab(5) for more information.
#

# <fs>                  <mountpoint>    <type>          <opts>          <dump/pass>

# NOTE: If your BOOT partition is ReiserFS, add the notail option to opts.
# /dev/BOOT             /boot           ext2            noauto,noatime  1 2
/dev/hda10              /               ext3            noatime         0 1
/dev/hda8               none            swap            sw              0 0
/dev/cdroms/cdrom0      /mnt/cdrom      iso9660         noauto,ro       0 0
#/dev/fd0               /mnt/floppy     auto            noauto          0 0

# NOTE: The next line is critical for boot!
proc                    /proc           proc            defaults        0 0

# glibc 2.2 and above expects tmpfs to be mounted at /dev/shm for
# POSIX shared memory (shm_open, shm_unlink).
# (tmpfs is a dynamically expandable/shrinkable ramdisk, and will
#  use almost no memory if not populated with files)
shm                     /dev/shm        tmpfs           nodev,nosuid,noexec     0 0
/dev/hda5               /pubdata        vfat            user,exec,rw,umask=0             00
/dev/hda1               /mnt/hda1       vfat              user,exec,rw,umask=0   00  
/dev/hda6               /mnt/hda6       ntfs-3g           user,exec,rw,umask=0     00
localhost ramaswamy #

i dont see root filesystem here

CooSee · Post by **CooSee** » Mon Dec 10, 2007 2:34 am

hmmm,... i did an ' Stage1 ' install using ' Fiordland Guide ',

maybe this is the Problem

and i see also at boot ' ... updating mtab ... , or something like this

never see this ' mtab - thing ' before.

so howto get rid of ' rootfs '

CooSee ' Ya

CooSee · Post by **CooSee** » Mon Dec 10, 2007 5:42 pm

Old Bugs are back

i figured out that this nasty Bug has ' maybe ' todo with ' checkroot '

http://bugs.gentoo.org/show_bug.cgi?id=38360

need Help

CooSee ' Ya

padoor · Post by **padoor** » Tue Dec 11, 2007 3:20 pm

i think it is worth starting from scratch again.
i have installed gentoo for 40 times since i started using gentoo. i never once had a bug you are worried about.
fsck runs ok? on all partitions[idont know about your reiserfs ]
i have always used ext3 only.

EddieHung · Post by **EddieHung** » Fri Dec 21, 2007 6:44 pm

This seems quite similar to another topic, here: http://forums.gentoo.org/viewtopic-p-4642478.html, where I've also added some more information.

Has anyone here found a solution?

Thanks,

Eddie

eccerr0r · Post by **eccerr0r** » Fri Dec 21, 2007 10:48 pm

curious,

Code: Select all

ls -l /etc/mtab

is it a file or a symlink to /proc/mounts ?

I see this happening when there's a symlink to /proc/mounts ... and my systems where mtab is handled by umount/mount only do not show this... Of course if the filesystem is generally read-only there's some advantage to have /etc/mtab -> /proc/mounts ...

EddieHung · Post by **EddieHung** » Fri Dec 21, 2007 11:38 pm

Here we go, this is what I see:

Code: Select all

eddie@eddies-lappy ~ $ ls /etc/mtab -l 
-rw-r--r-- 1 root root 551 Dec 21 20:29 /etc/mtab
eddie@eddies-lappy ~ $ ls /proc/mounts -l
lrwxrwxrwx 1 root root 11 Dec 21 23:36 /proc/mounts -> self/mounts

So I guess the answer is no =)

Eddie

overkll · Post by **overkll** » Sat Dec 22, 2007 1:46 am

Was there a section in that howto that says to copy /proc/mounts to /etc/mtab for your chroot? Maybe you have a stale mtab.

Boot up with a gentoo minimal install disk or even better, sysrescuecd and then mount your root fs. Then nuke (delete) your mtab file and reboot. Should do the trick. Make sure you nuke the mtab on disk, not the the livecd one.

EddieHung · Post by **EddieHung** » Sat Dec 22, 2007 2:03 am

overkll wrote:Was there a section in that howto that says to copy /proc/mounts to /etc/mtab for your chroot? Maybe you have a stale mtab.

Boot up with a gentoo minimal install disk or even better, sysrescuecd and then mount your root fs. Then nuke (delete) your mtab file and reboot. Should do the trick. Make sure you nuke the mtab on disk, not the the livecd one.

Interesting.. I don't seem to recall doing that, whether I was asked to or not.

I haven't got a livecd to hand at the moment - so I can't really try this out - but like I mentioned this is something that never happened when I first installed gentoo. Granted between now and then I've done a lot more tinkering, which is most likely the reason behind my downfall - but I guess I'd like to know what it was =)

Eddie

CooSee · Post by **CooSee** » Sat Dec 22, 2007 3:41 pm

hello,

IMHO the problem is that ' /etc/conf.d/checkfs ' always create a new ' mtab ' and ignore the current one

on old installed Systems i never see the message before

And why the current ' /proc/mounts / ' have this ' rootfs '

cat /proc/mounts

rootfs / rootfs rw 0 0
/dev/root / reiserfs rw,noatime 0 0
proc /proc proc rw,nosuid,nodev,noexec 0 0
sysfs /sys sysfs rw,nosuid,nodev,noexec 0 0
udev /dev tmpfs rw,nosuid 0 0
none /dev/pts devpts rw,nosuid,noexec 0 0
shm /dev/shm tmpfs rw,nosuid,nodev,noexec 0 0
none /lib/rc/init.d tmpfs rw,nosuid,nodev,noexec 0 0
usbfs /proc/bus/usb usbfs rw,nosuid,noexec 0 0
nfsd /proc/fs/nfsd nfsd rw,nosuid,nodev,noexec 0 0
securityfs /sys/kernel/security securityfs rw,nosuid,nodev,noexec 0 0
debugfs /sys/kernel/debug debugfs rw,nosuid,nodev,noexec 0 0

CooSee ' Ya

padoor · Post by **padoor** » Sat Dec 22, 2007 5:20 pm

Directory of J:\etc\conf.d

12/22/2007 10:42p <DIR> .
12/22/2007 08:26a <DIR> ..
09/26/2007 07:58a 722 consolefont
09/26/2007 07:58a 254 bootmisc
12/06/2007 01:28p 972 clock
09/26/2007 07:58a 33,624 net.example
09/26/2007 07:58a 338 net
09/26/2007 07:58a 372 env_whitelist
09/26/2007 07:58a 83 hostname
09/26/2007 07:58a 709 keymaps
09/26/2007 07:58a 123 local.start
09/26/2007 07:58a 217 local.stop
12/21/2007 02:34p 149 rsyncd
09/26/2007 07:58a 8,722 rc
08/10/2007 09:36a 430 hdparm
12/21/2007 02:18p 2,377 splash
09/26/2007 07:58a 11,930 wireless.example
09/09/2007 09:07p 90 xinetd
10/24/2007 09:21a 395 sshd
07/09/2007 03:48p 580 gpm
08/03/2006 09:07p 83 hostname~
09/11/2007 11:43a 553 xdm
10/21/2007 03:27p 926 saslauthd
10/11/2007 03:56p 542 ntp-client
10/11/2007 03:56p 179 ntpd
10/20/2007 02:49p 515 alsasound
04/27/2007 08:13a 291 usb
09/09/2007 09:12p 737 esound
04/28/2007 05:39p 3,029 cryptfs
12/22/2007 10:42p 45,057 test
05/08/2007 11:35a 426 dnsextd
05/08/2007 11:35a 67 mDNSResponderPosix
11/06/2007 10:14a 364 hald
05/18/2007 07:20a 1,605 spamd details
12/21/2007 04:32p 1,291 samba
12/21/2007 01:44p 412 crypto-loop
10/15/2007 10:03a 156 acpid
10/18/2007 10:15a 15 device-mapper

i dont see a checkfs in this folder. nr i have never come across this conf.d content in all my previous gentoo installatio.,nor the install doc says about making one checkfs

i would suggest you remove it temporarily and see if your mtab situation improves.

is it doing some cron job? a mounted partition checkfs can result in these troubles er i guess so.

CooSee · Post by **CooSee** » Sat Dec 22, 2007 5:27 pm

hello,

ooh sorry, i mean ' /etc/init.d/checkfs '

or maybe the ' rootfs ' came because of this:

from ' /etc/init.d/checkroot '

do_mtab() {
# Don't create mtab if /etc is readonly
if ! printf "" 2>/dev/null >/etc/mtab ; then
ewarn "Skipping /etc/mtab initialization (ro root?)"
return 0
fi
ebegin "Updating /etc/mtab" < --- always get this at boot, never get this before

# With / as tmpfs we cannot umount -at tmpfs in localmount as that
# makes / readonly and dismounts all tmpfs even if in use which is
# not good. Luckily, umount uses /etc/mtab instead of /proc/mounts
# which allows this hack to work.
grep -v "^[^ ]* / tmpfs " /proc/mounts > /etc/mtab

# Remove stale backups
rm -f /etc/mtab~ /etc/mtab~~
eend 0
}

CooSee ' Ya

padoor · Post by **padoor** » Sun Dec 23, 2007 4:29 am

some things look different in your files.
i have below given the /etc/init.d/checkfs and checkroot files seen in my system which is upto todays portage.

/etc/init.d/checkfs

Code: Select all

#!/sbin/runscript
# Copyright 1999-2007 Gentoo Foundation
# Distributed under the terms of the GNU General Public License v2

depend() {
	need checkroot modules
}

start() {
	local retval=0

	# Setup dm-crypt mappings if any
	start_addon dm-crypt

	if [[ -f /fastboot ]] || [[ -n ${CDBOOT} ]] ; then
		rm -f /fastboot
	else
		ebegin "Checking all filesystems"
		if [[ -f /forcefsck ]] ; then
			ewarn "A full fsck has been forced"
			fsck -C -T -R -A -a -f
			retval=$?
			rm -f /forcefsck
		else
			fsck -C -T -R -A -a
			retval=$?
		fi
		if [[ ${retval} -eq 0 ]] ; then
			eend 0
		elif [[ ${retval} -eq 8 ]] ; then
			ewend 1 "Operational error, continuing"
			# Everything should be ok, so return a pass
			return 0
		elif [[ ${retval} -ge 1 && ${retval} -le 3 ]] ; then
			ewend 1 "Filesystem errors corrected."
			# Everything should be ok, so return a pass
			return 0
		else
			if [[ ${RC_FORCE_AUTO} == "yes" ]] ; then
				eend 2 "Fsck could not correct all errors, rerunning"
				fsck -C -T -R -A -y
				retval=$?
			fi

			if [[ ${retval} -gt 3 ]] ; then
				eend 2 "Fsck could not correct all errors, manual repair needed"
				sulogin ${CONSOLE}
			fi
		fi
	fi
}


# vim:ts=4

/etc/init.d/checkroot

Code: Select all

#!/sbin/runscript
# Copyright 1999-2007 Gentoo Foundation
# Distributed under the terms of the GNU General Public License v2

depend() {
	before *
}

start() {
	local retval=0

	if [[ ! -f /fastboot && -z ${CDBOOT} ]] \
	&& ! is_net_fs / && ! is_union_fs / ; then
		if touch -c / >& /dev/null ; then
			ebegin "Remounting root filesystem read-only"
			mount -n -o remount,ro /
			eend $?
		fi

		if [[ -f /forcefsck ]] || get_bootparam "forcefsck" ; then
			ebegin "Checking root filesystem (full fsck forced)"
			fsck -C -a -f /
			# /forcefsck isn't deleted because checkfs needs it.
			# it'll be deleted in that script.
			retval=$?
		else
			# Obey the fs_passno setting for / (see fstab(5))
			# - find the / entry
			# - make sure we have 6 fields
			# - see if fs_passno is something other than 0
			if [[ -n $(awk '($1 ~ /^(\/|UUID|LABEL)/ && $2 == "/" \
			                && NF == 6 && $6 != 0) { print }' /etc/fstab) ]]
			then
				ebegin "Checking root filesystem"
				fsck -C -T -a /
				retval=$?
			else
				ebegin "Skipping root filesystem check (fstab's passno == 0)"
				retval=0
			fi
		fi

		if [[ ${retval} -eq 0 ]] ; then
			eend 0
		elif [[ ${retval} -eq 1 ]] ; then
			ewend 1 "Filesystem repaired"
		elif [[ ${retval} -eq 2 || ${retval} -eq 3 ]] ; then
			ewend 1 "Filesystem repaired, but reboot needed!"
			if [[ ${RC_FORCE_AUTO} != "yes" ]] ; then
				echo -ne "\a"; sleep 1; echo -ne "\a"; sleep 1
				echo -ne "\a"; sleep 1; echo -ne "\a"; sleep 1
				ewarn "Rebooting in 10 seconds ..."
				sleep 10
			fi
			einfo "Rebooting"
			/sbin/reboot -f
		else
			if [[ ${RC_FORCE_AUTO} == "yes" ]] ; then
				eend 2 "Rerunning fsck in force mode"
				fsck -y -C -T /
			else
				eend 2 "Filesystem couldn't be fixed :("
				sulogin ${CONSOLE}
			fi
			einfo "Unmounting filesystems"
			/bin/mount -a -o remount,ro &> /dev/null
			einfo "Rebooting"
			/sbin/reboot -f
		fi
	fi

	# Should we mount root rw ?  the touch check is to see if the / is
	# already mounted rw in which case there's nothing for us to do
	if mount -vf -o remount / 2> /dev/null | \
	   awk '{ if ($6 ~ /rw/) exit 0; else exit 1; }' && \
	   ! touch -c / >& /dev/null
	then
		ebegin "Remounting root filesystem read/write"
		mount -n -o remount,rw / &> /dev/null
		if [[ $? -ne 0 ]] ; then
			eend 2 "Root filesystem could not be mounted read/write :("
			if [[ ${RC_FORCE_AUTO} != "yes" ]] ; then
				sulogin ${CONSOLE}
			fi
		else
			eend 0
		fi
	fi

	if [[ ${BOOT} == "yes" ]] ; then
		local x=
		local y=

		#
		# Create /etc/mtab
		#

		# Don't create mtab if /etc is readonly
		if ! touch /etc/mtab 2> /dev/null ; then
			ewarn "Skipping /etc/mtab initialization (ro root?)"
			return 0
		fi

		# Clear the existing mtab
		> /etc/mtab

		# Add the entry for / to mtab
		mount -f /

		# Don't list root more than once
		awk '$2 != "/" {print}' /proc/mounts >> /etc/mtab

		# Now make sure /etc/mtab have additional info (gid, etc) in there
		for x in $(awk '{ print $2 }' /proc/mounts | sort -u) ; do
			for y in $(awk '{ print $2 }' /etc/fstab) ; do
				if [[ ${x} == ${y} ]] ; then
					mount -f -o remount $x
					continue
				fi
			done
		done

		# Remove stale backups
		rm -f /etc/mtab~ /etc/mtab~~
	fi
}


# vim:ts=4

these are complete scripts of the files. compare and do need fuls. you may even run these scripts inplace of your files.

i hope this may help you

bilbotux · Post by **bilbotux** » Sun Dec 23, 2007 8:39 am

Well, I have the same problem as CooSee, and the same init.d scripts.
I guess the difference is because I (and probable CooSee also) have the baselayout 2.0.0_rc6 version.

EddieHung · Post by **EddieHung** » Sun Dec 23, 2007 12:21 pm

bilbotux wrote:Well, I have the same problem as CooSee, and the same init.d scripts.
I guess the difference is because I (and probable CooSee also) have the baselayout 2.0.0_rc6 version.

A quick me too here, I'm suffering from the problem using the masked baselayout v2!

Maybe that is the root of my problems...

Eddie

CooSee · Post by **CooSee** » Sun Dec 23, 2007 1:08 pm

EddieHung wrote:
bilbotux wrote:Well, I have the same problem as CooSee, and the same init.d scripts.
I guess the difference is because I (and probable CooSee also) have the baselayout 2.0.0_rc6 version.
A quick me too here, I'm suffering from the problem using the masked baselayout v2!

Maybe that is the root of my problems...

Eddie

hello,

yes

eix baselayout

sys-apps/baselayout
Available versions: 1.11.15-r3 1.12.9-r2 (~)1.12.10-r3 (~)1.12.10-r4 1.12.10-r5 {M}(~)2.0.0_rc4 {M}(~)2.0.0_rc4-r1 {M}(~)2.0.0_rc6 {bootstrap build kernel_FreeBSD kernel_linux pam static unicode}
Installed versions: 2.0.0_rc6(06:23:58 23.12.2007)(kernel_linux pam unicode -bootstrap -build -kernel_FreeBSD -static)
Homepage: http://www.gentoo.org/
Description: Filesystem baselayout and init scripts

this is the ' delinquent '

CooSee ' Ya

padoor · Post by **padoor** » Sun Dec 23, 2007 4:13 pm

Code: Select all

[I] sys-apps/baselayout
     Available versions:  1.11.15-r3 1.12.9-r2 (~)1.12.10-r3 (~)1.12.10-r4 1.12.10-r5 [M](~)2.0.0_rc4 [M](~)2.0.0_rc4-r1 [M](~)2.0.0_rc6 {bootstrap build kernel_FreeBSD kernel_linux pam static unicode}
     Installed versions:  1.12.10-r5(07:58:16 09/26/07)(unicode -bootstrap -build -static)
     Homepage:            http://www.gentoo.org/
     Description:         Filesystem baselayout and init scripts

Code: Select all

localhost ramaswamy # emerge -av baselayout

These are the packages that would be merged, in order:

Calculating dependencies... done!
[ebuild   R   ] sys-apps/baselayout-1.12.10-r5  USE="unicode -bootstrap -build -static" 0 kB

Total: 1 package (1 reinstall), Size of downloads: 0 kB

Would you like to merge these packages? [Yes/No] n

Quitting.

Code: Select all

localhost ramaswamy # emerge -Duav baselayout

These are the packages that would be merged, in order:

Calculating dependencies... done!
[ebuild     U ] sys-apps/debianutils-2.28.2 [2.25] USE="-static" 135 kB

Total: 1 package (1 upgrade), Size of downloads: 135 kB

Would you like to merge these packages? [Yes/No]

it does not want to emerge baselayout-2.0* at all

as seen above it is all masked for me x86 system

as you see to update wants to emerge debianutils

i would try to downgrade debianutils and /or baselayout for your troubles.

i remember to have read somewhere baselayout-2.0* has different initscripts
and has some special start sequence controls. and that it is still all masked .
i dont see how you two can install the masked package.
i also use [accept_keywords=~x86] in my make.conf
so it is no use for you of my files quote.

CooSee · Post by **CooSee** » Sun Dec 23, 2007 4:45 pm

hello,

you're right

@ padoor

intalled with this guide ' http://forums.gentoo.org/viewtopic-t-61 ... seren.html '

CooSee ' Ya

padoor · Post by **padoor** » Sun Dec 23, 2007 5:34 pm

very daring activity.
i feel taking part in FEAR FACTOR show is less dangerous

and adventurous

enjoy the fun.

i am sure you are having more than 2 or more computers to play with
good hunt.
you have installed kde-4.0 also?
edit:
do you really get all that is talked about baselayout-2.0*

bilbotux · Post by **bilbotux** » Sun Dec 23, 2007 7:45 pm

Yeah, it seems baselayout2 init scripts are the source of the 'problem', and whether it is hard masked or not is not a reason not to solve this.
But Roy (the one who wrote the baselayout2) has recently left gentoo (link to his blog: http://roy.marples.name/node/337), so I do not know if this one will be solved one day. This is not a big issue, but this bother me a little

I'm wondering if we should submit a bug report on gentoo's bugzilla or not ??

padoor · Post by **padoor** » Mon Dec 24, 2007 2:12 am

currently its status is unsupported software.
where you report bug?
you have to wait untill it is open for all emerge in portage.
as long as your system work other wise alright why worry about startup message?

CooSee · Post by **CooSee** » Mon Dec 24, 2007 3:11 am

hello,

Thanks for your help @ padoor

i can live with that

my GenToo purrs like a kitten

is not a big deal to re-install everything on my new X38-DQ6 - QuadCore 6600 System @ 8GB RAM

... mary Xmas ...

CooSee ' Ya

padoor · Post by **padoor** » Mon Dec 24, 2007 3:54 am

MERRY X MAS
HAVE NICE TIME.

UberLord · Post by **UberLord** » Sun Feb 03, 2008 5:01 pm

rootfs is put there by /proc/mounts when we update /etc/mtab.
The kernel wants it there, and some user kernel patches which overmount root with /tmpfs need that entry to correctly shut down the system, so we stopped filtering it.

If you think this is incorrect, then you should report it to the linux kernel team and not Gentoo.