Re: [linux-lvm] [lvm 0.8 final] lvmcreate_initrd fails for me

[Les Hazelton <seawolf@attglobal.net>]

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Andreas Dilger wrote:
 
> Is it possible you are running out of inodes on the ram disk?  You can

This is the obviously the reason for the problem.  I did a scan of /dev
using [ls /dev | grep -c ""] which produced a number 6261. There are a
huge number if ISDN related entries in /dev. I need to look at removing
them since I don't use ISDN.

> - call the ramdisk initrd-lvm-$VERSION.gz to allow multiple ramdisk 

I really like the new name - saves me from changing it by hand ;-)

> Cheers, Andreas

The new lvmcreate_initrd you posted got me running - with a few changes.
I had to shift to the mke2fs command with the -N parm as you suggested.

Even with the -N parm I was still having problems so I rebooted the
system with a 12288k ram disk size and adjusted the script accordingly.
That got everything working. 

I also made a change - for testing - so I could see the generated mke2fs
command.  I have attached the script as I used it.  Thanks for the help.

-- 

Good Journey, longevity and prosperity to all

Les Hazelton

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#!/bin/sh
#
#  Copyright (C) 1997 - 2000  Heinz Mauelshagen, Sistina Software
# 
#  June 1999
#  December 1999
#  January 2000
#  January 2001
# 
#  LVM is free software; you can redistribute it and/or modify
#  it under the terms of the GNU General Public License as published by
#  the Free Software Foundation; either version 2, or (at your option)
#  any later version.
#  
#  LVM is distributed in the hope that it will be useful,
#  but WITHOUT ANY WARRANTY; without even the implied warranty of
#  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
#  GNU General Public License for more details.
#  
#  You should have received a copy of the GNU General Public License
#  along with LVM; see the file COPYING.  If not, write to
#  the Free Software Foundation, 59 Temple Place - Suite 330,
#  Boston, MA 02111-1307, USA. 
# 

#
# Changelog
#
#   16/11/1999 - corrected -N type with mke2fs
#   19/12/1999 - use correct ramdisk size, strip shared library to save space
#   04/01/2000 - support /proc mount, because lvm_dir_cache now uses it
#   01/12/2001 - always create enough inodes in ramdisk for new files
#   [AED]      - don't try to copy LVM module if LVM is compiled into kernel
#              - check all INITRDFILES for library dependencies
#              - make commands quiet and avoid redirecting errors to /dev/null
#              - use cleanup function for all errors, interrupts, normal exit
#

cmd=`basename $0`
VERSION=$1
[ -z "$VERSION" ] && VERSION=`uname -r`
DEVRAM=/tmp/initrd.$$
INITRD=/boot/initrd-lvm-$VERSION.gz
INITRDSIZE=12288
MODULES=/lib/modules/$VERSION
INITRDFILES="/sbin/modprobe /sbin/vgchange /sbin/vgscan /bin/bash /bin/mount /bin/umount /bin/sh /bin/rm /sbin/insmod $MODULES/modules.dep"
if [ -r $MODULES/kernel/drivers/md/lvm-mod.o ]; then
  INITRDFILES="$INITRDFILES $MODULES/kernel/drivers/md/lvm-mod.o"
elif [ -r $MODULES/block/lvm-mod.o ]; then
  INITRDFILES="$INITRDFILES $MODULES/block/lvm-mod.o"
elif [ -r $MODULES/block/lvm.o ]; then
  INITRDFILES="$INITRDFILES $MODULES/block/lvm.o"
fi

TMPMNT=/tmp/mnt.$$

cleanup () {
  [ "`mount | grep $DEVRAM`" ] && umount $DEVRAM
  [ -f $DEVRAM ] && rm $DEVRAM
  [ -d $TMPMNT ] && rmdir $TMPMNT
  exit $1
}

trap "
  echo -e 'Bye bye...\n'
  cleanup 1
" 1 2 3 15

create_fstab () {
   cat << FSTAB > $TMPMNT/etc/fstab
/dev/ram        /               ext2    defaults        0   0
proc            /proc           proc    defaults        0   0
FSTAB
   chmod 644 $TMPMNT/etc/fstab
}

create_linuxrc () {
   cat << LINUXRC > $TMPMNT/linuxrc
#!/bin/sh
/sbin/modprobe lvm-mod
/bin/mount /proc
/sbin/vgscan
/sbin/vgchange -a y
/bin/umount /proc
LINUXRC
   chmod 555 $TMPMNT/linuxrc
}

#
# Main
#
echo -e "\nLogical Volume Manager 0.9 by Heinz Mauelshagen  01/12/2001\n"
echo -e "$cmd -- create an LVM initial ram disk $INITRD\n"

# figure out which actual shared libraries we need in our initrd
echo "$cmd -- figuring out shared libraries"
SHLIBS=`ldd $INITRDFILES 2>/dev/null | awk '{if (/=>/) { print $3 }}' |
sort -u`
if [ $? -ne 0 ]; then
   echo -e "$cmd -- ERROR figuring out needed shared libraries\n"
   exit 1
fi

echo "$cmd -- making ram filesystem"
dd if=/dev/zero of=$DEVRAM count=$INITRDSIZE bs=1024 >/dev/null 2>&1
if [ $? -ne 0 ]; then
   echo -e "$cmd -- ERROR creating loopback file\n"
   cleanup 1
fi

# We could use -N to specify the number of inodes, but this option only
# appeared in mke2fs 1.14 (Jan 1999) so we will avoid it at least for now
NUMINO="`find /dev $SHLIBS $INITRDFILES 2>/dev/null | wc -w`"
#mke2fs -q -F -m0 -N `expr $NUMINO + 64` $DEVRAM $INITRDSIZE
BYTES_PER_INODE=`expr $INITRDSIZE \* 1024 / \( $NUMINO + 64 \)`
#rnCmd="mke2fs -q -F -m0 -i $BYTES_PER_INODE $DEVRAM $INITRDSIZE"
rnCmd="mke2fs -q -F -m0 -N `expr $NUMINO + 64` $DEVRAM $INITRDSIZE"
echo "$cmd -- mke2fs command ["$rnCmd"]"
$rnCmd 
if [ $? -ne 0 ]; then
   echo -e "$cmd -- ERROR making ram disk filesystem\n"
   cleanup 1
fi

mkdir $TMPMNT
if [ $? -ne 0 ]; then
   echo -e "$cmd -- ERROR making $TMPMNT\n"
   cleanup 1
fi

echo "$cmd -- mounting ram filesystem"
mount -oloop $DEVRAM $TMPMNT
if [ $? -ne 0 ]; then
   echo -e "$cmd -- ERROR mounting $DEVRAM on $TMPMNT\n"
   cleanup 1
fi

mkdir $TMPMNT/etc $TMPMNT/proc

#
# create new modules configuration to avoid kmod complaining
# about nonexsisting modules.
#
MODCONF=/etc/modules.conf
[ ! -r $MODCONF -a -r /etc/conf.modules ] && MODCONF=/etc/conf.modules
echo "$cmd -- creating new $MODCONF"
MAJ=0
while [ $MAJ -lt 256 ]; do
   echo "alias block-major-$MAJ off"
   echo "alias char-major-$MAJ  off"
   MAJ=`expr $MAJ + 1`
done > $TMPMNT/$MODCONF

# to ensure, that modprobe doesn complain about timestamps
echo "$cmd -- creating new modules.dep"
depmod -a $VERSION
if [ $? -ne 0 ]; then
   echo -e "$cmd -- ERROR running depmod\n"
   cleanup 1
fi

# copy necessary files to ram disk
echo "$cmd -- copying files to ram disk"
find $INITRDFILES /dev|cpio -pdm --quiet $TMPMNT
if [ $? -ne 0 ]; then
   echo -e "$cmd -- ERROR cpio to ram disk\n"
   cleanup 1
fi

echo "$cmd -- copying shared libraries to ram disk"
find $SHLIBS|cpio -Lpdm --quiet $TMPMNT
if [ $? -ne 0 ]; then
   echo -e "$cmd -- ERROR copying needed shared libraries to ram disk\n"
   cleanup 1
fi
for lib in $SHLIBS
do
   strip $TMPMNT$lib >/dev/null
done

echo "$cmd -- creating new /linuxrc"
create_linuxrc
if [ $? -ne 0 ]; then
   echo -e "$cmd -- ERROR creating linuxrc\n"
   cleanup
   exit 1
fi

echo "$cmd -- creating new /etc/fstab"
create_fstab
if [ $? -ne 0 ]; then
   echo -e "$cmd -- ERROR creating /etc/fstab\n"
   cleanup 1
fi

echo "$cmd -- ummounting ram disk"
umount $DEVRAM
if [ $? -ne 0 ]; then
   echo -e "$cmd -- ERROR umounting $DEVRAM\n"
   cleanup 1
fi

echo "$cmd -- creating compressed initrd in $INITRD"
dd if=$DEVRAM bs=1k count=$INITRDSIZE 2>/dev/null | gzip -9 > $INITRD
if [ $? -ne 0 ]; then
   echo -e "$cmd -- ERROR creating $INITRD\n"
   cleanup 1
fi

cleanup 0