If a mount point cannot be moved to the new root, umount it with
MNT_DETACH, so that it is lazy umounted and does not show up in
/proc/mounts anymore.
[kzak@redhat.com: - add MNT_DETACH macro fallback]
Signed-off-by: Harald Hoyer <harald@redhat.com>
Signed-off-by: Karel Zak <kzak@redhat.com>
Handle /run just like /dev, /sys and /proc
Do not mount move, if there is already something mounted on the
destination folder.
Signed-off-by: Harald Hoyer <harald@redhat.com>
Signed-off-by: Karel Zak <kzak@redhat.com>
Solaris lacks err, errx, warn and warnx. This also means the err.h header
doesn't exist. Removed err.h include from all files, and included err.h from
c.h instead if it exists, otherwise alternatives are provided.
Signed-off-by: Fabian Groffen <grobian@gentoo.org>
This reverts commit a692a87459.
On Wed, Nov 18, 2009 at 03:33:12PM +0000, Daniel Drake wrote:
> Booting into a system this way just leads to problems because
> you cannot remount the root read-only at shutdown (leading to unclean
> shutdowns).
> Miklos Szeredi pointed out a trick to turn any directory into a
> mount point which avoids this problem. Therefore we can simplify
> switch_root again and simply document that its users should set
requested by dracut developers because:
bash: cannot set terminal process group (-1): Inappropriate ioctl for device
Addresses-Red-Hat-Bug: #519237
Signed-off-by: Karel Zak <kzak@redhat.com>
The current switch_root can only switch to a new root that is the root
of a mount point.
This patch adds support for "subroots", where the new root is
somewhere below a mount point. It does this by adding in a few extra
steps to chroot into the subroot after the enclosing partition has
been moved and entered.
This will be used by OLPC, who sort-of have 2 copies of Fedora stored
on a single partition under different directory trees, where the
initramfs decides which one to boot into
[kzak@redhat.com:
- port to the current u-l-ng switch_root code
- don't use static buffer for "dir" in get_parent_mount()]
CC: Peter Jones <pjones@redhat.com>
Signed-off-by: Daniel Drake <dsd@laptop.org>
Signed-off-by: Karel Zak <kzak@redhat.com>
This way there's no race between unlinking the /newroot directory and
the MS_MOVE/chroot() to get away from it.
Signed-off-by: Peter Jones <pjones@redhat.com>
Fork before cleaning up the old filesystem, so it becomes asyncronous,
which results in a faster boot time.
Signed-off-by: Peter Jones <pjones@redhat.com>
This makes recursiveRemove() use fdopendir() instead of taking a path,
so we're always sure about which namespace we're starting from.
Signed-off-by: Peter Jones <pjones@redhat.com>
Signed-off-by: Karel Zak <kzak@redhat.com>
Copied from Dracut project:
git://dracut.git.sourceforge.net/gitroot/dracut
switch_root history in dracut.git repository:
$ git shortlog switch_root.c
Harald Hoyer (5):
replace switch_root shell script with binary
add \n to switch_root
use switch_root code from http://pjones.fedorapeople.org/mkstart/usr/lib/mkstart/switchroot.c
mount move instead of umount and fix the search for fallback inits
setsid() and set controlling terminal for real /sbin/init
Victor Lowther (2):
Simplify switch_root.c a bit
Remove all files on the initramfs before switching root
Signed-off-by: Peter Jones <pjones@redhat.com>
Signed-off-by: Karel Zak <kzak@redhat.com>
