This worked like a charm. Thank you very much :)
Gesendet: Montag, 13. Mai 2013 um 11:07 Uhr
Von: "Sam Liddicott" <s...@liddicott.com>
An: pau...@gmx.net
Cc: aufs-users <aufs-users@lists.sourceforge.net>
Betreff: Re: (initramfs) How to access rw-part after switch_root ?
You should probably save it with a bind mount before cleanup:
mkdir -p /mnt/root/rw
mount -o bind /mnt/tmpfs/rw /mnt/root/rw
then after the switch-root you can look in /rw to find all the modifications
that have been made
On Mon, May 13, 2013 at 9:43 AM, <[1]pau...@gmx.net> wrote:
Hi there
Iam quite new to aufs but I managed to get my gentoo boot a
squashfs.img
into aufs-ro and aufs-rw. My system boots successfuly but how can I
access
the rw-dir I defined in the initramfs after switch_root?
### init #############
...pre-stuff
...
# mount the usb with the squash.img and copy it to tmpfs
mkdir -p /mnt/sdb1
mount /dev/sdb1 /mnt/sdb1
mkdir /mnt/tmpfs
mount -t tmpfs -o size=1500m tmpfs /mnt/tmpfs
cp -a /mnt/sdb1/squash.img /mnt/tmpfs
umount /dev/sdb1
# make aufs ro-rw-newroot
mkdir /mnt/ro_root
mkdir -p /mnt/tmpfs/rw
mount -o ro /mnt/tmpfs/squash.img /mnt/ro_root || rescue_shell
mount -t aufs -o br=/mnt/tmpfs/rw:/mnt/ro_root none /mnt/root
# Clean up.
umount /proc
umount /sys
umount /dev
# Boot the real thing.
exec switch_root /mnt/root /sbin/init || rescue_shell
#######################
my mount after switch_root looks like:
########################
rootfs on / type rootfs (rw)
tmpfs on /mnt/tmpfs type tmpfs (rw,relatime,size=1536000k)
/dev/loop0 on /mnt/ro_root type squashfs (ro,relatime)
none on / type aufs (rw,relatime,si=97dd6d33cdfc9433)
proc on /proc type proc (rw,nosuid,nodev,noexec,relatime)
tmpfs on /run type tmpfs (rw,nosuid,nodev,relatime,mode=755)
udev on /dev type devtmpfs
(rw,nosuid,relatime,size=10240k,nr_inodes=505505,mode=755)
devpts on /dev/pts type devpts
(rw,nosuid,noexec,relatime,gid=5,mode=620)
shm on /dev/shm type tmpfs (rw,nosuid,nodev,noexec,relatime)
sysfs on /sys type sysfs (rw,nosuid,nodev,noexec,relatime)
debugfs on /sys/kernel/debug type debugfs
(rw,nosuid,nodev,noexec,relatime)
cgroup_root on /sys/fs/cgroup type tmpfs
(rw,nosuid,nodev,noexec,relatime,size=10240k,mode=755)
openrc on /sys/fs/cgroup/openrc type cgroup
(rw,nosuid,nodev,noexec,relatime,release_agent=/lib64/rc/sh/cgroup-release
-a
gent.sh,name=openrc)
cpuset on /sys/fs/cgroup/cpuset type cgroup
(rw,nosuid,nodev,noexec,relatime,cpuset)
cpu on /sys/fs/cgroup/cpu type cgroup
(rw,nosuid,nodev,noexec,relatime,cpu)
cpuacct on /sys/fs/cgroup/cpuacct type cgroup
(rw,nosuid,nodev,noexec,relatime,cpuacct)
freezer on /sys/fs/cgroup/freezer type cgroup
(rw,nosuid,nodev,noexec,relatime,freezer)
binfmt_misc on /proc/sys/fs/binfmt_misc type binfmt_misc
(rw,nodev,noexec,nosuid)
#########################
--------------------------------------------------------------------------
----
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References
1. file://localhost/tmp/pau...@gmx.net
2. http://p.sf.net/sfu/neotech_d2d_may
------------------------------------------------------------------------------
Learn Graph Databases - Download FREE O'Reilly Book
"Graph Databases" is the definitive new guide to graph databases and
their applications. This 200-page book is written by three acclaimed
leaders in the field. The early access version is available now.
Download your free book today! http://p.sf.net/sfu/neotech_d2d_may
