Full backport of the autostart / autoboot rollup patch from
master to stable-1.0.

lxc-autostart: rework boot and group handling

This adds new functionality to lxc-autostart.

*) The -g / --groups option is multiple cummulative entry.
    This may be mixed freely with the previous comma separated
    group list convention.  Groups are processed in the
    order they first appear in the aggregated group list.

*) The NULL group may be specified in the group list using either a
    leading comma, a trailing comma, or an embedded comma.

*) Booting proceeds in order of the groups specified on the command line
    then ordered by lxc.start.order and name collalating sequence.

*) Default host bootup is now specified as "-g onboot," meaning that first
    the "onboot" group is booted and then any remaining enabled
    containers in the NULL group are booted.

*) Adds documentation to lxc-autostart for -g processing order and
    combinations.

*) Parameterizes bootgroups, options, and shutdown delay in init scripts
    and services.

*) Update the various init scripts to use lxc-autostart in a similar way.
Reported-by: CDR <venefax@gmail.com>
Signed-off-by: Dwight Engen <dwight.engen@oracle.com>
Signed-off-by: Michael H. Warfield <mhw@WittsEnd.com>
Acked-by: Stéphane Graber <stgraber@ubuntu.com>

This hides some of the confusing "command X failed to receive response"
why are usually caused by another more understandable error.

On failure to start() from lxc-start, a new error message is displayed,
suggesting the user sets logfile and loglevel and if using -d, restarts
the container in the foreground instead.
Signed-off-by: Stéphane Graber <stgraber@ubuntu.com>
Acked-by: Serge E. Hallyn <serge.hallyn@ubuntu.com>

It is not possible to mount a block device from a non-init user namespace.
Therefore if root on the host is starting a container with a uid
mapping, and the rootfs is a block device, then mount the rootfs before
we spawn the container init task.

This addresses https://github.com/lxc/lxc/issues/221Signed-off-by: Serge Hallyn <serge.hallyn@ubuntu.com>
Acked-by: Stéphane Graber <stgraber@ubuntu.com>

This is to deal with the GPG pool occasionaly yielding broken servers.
Signed-off-by: Stéphane Graber <stgraber@ubuntu.com>
Acked-by: Serge E. Hallyn <serge.hallyn@ubuntu.com>

Set the halt.target action to be sigpwr.target.  This allows
SIGPWR to properly shut the container down from lxc-stop.

Renable the systemd-journald.service.
Signed-off-by: Michael H. Warfield <mhw@WittsEnd.com>
Acked-by: Stéphane Graber <stgraber@ubuntu.com>

before using it, like the other snapshot api methods do.

This will need to go into stable-1.0 as well.
Signed-off-by: Serge Hallyn <serge.hallyn@ubuntu.com>
Acked-by: Stéphane Graber <stgraber@ubuntu.com>

Signed-off-by: Stéphane Graber <stgraber@ubuntu.com>
Acked-by: Serge E. Hallyn <serge.hallyn@ubuntu.com>

The template name isn't required, if it's not passed, then create will
simply be asked to create a container without a rootfs.
Signed-off-by: Stéphane Graber <stgraber@ubuntu.com>
Acked-by: Serge E. Hallyn <serge.hallyn@ubuntu.com>

Signed-off-by: Bartosz Tomczyk <bartekplus@gmail.com>
Acked-by: Stéphane Graber <stgraber@ubuntu.com>

Signed-off-by: Bartosz Tomczyk <bartekplus@gmail.com>
Acked-by: Stéphane Graber <stgraber@ubuntu.com>

Fix configure_plamo so as not to configure wireless network interface
in containers even if the host uses wireless network interface.
Signed-off-by: TAMUKI Shoichi <tamuki@linet.gr.jp>
Acked-by: Stéphane Graber <stgraber@ubuntu.com>

Signed-off-by: Dwight Engen <dwight.engen@oracle.com>
Acked-by: Serge E. Hallyn <serge.hallyn@ubuntu.com>

AC_SEARCH_LIBS always places the library being queried into LIBS.  We
don't want that - we were only checking whether a function is
available.  Not everything (notably not init.lxc.static) needs to
link against -lcgmanager.
Signed-off-by: Serge Hallyn <serge.hallyn@ubuntu.com>
Acked-by: Stéphane Graber <stgraber@ubuntu.com>

Signed-off-by: Bartosz Tomczyk <bartekplus@gmail.com>
Acked-by: Dwight Engen <dwight.engen@oracle.com>

Newer kernels optionally disallow reading /proc/$$/personality by
non-root users.  We can get the personality through the lxc command
interface, so do so.

Also try to be more consistent about personality being a signed long.
We had it as int, unsigned long, signed long throughout the code.

(This addresses bug
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1322067 :
3.15.0-1.x breaks lxc-attach for unprivileged containers)
Signed-off-by: Serge Hallyn <serge.hallyn@ubuntu.com>
Acked-by: Stéphane Graber <stgraber@ubuntu.com>

Signed-off-by: S.Çağlar Onur <caglar@10ur.org>
Acked-by: Serge E. Hallyn <serge.hallyn@ubuntu.com>

Signed-off-by: S.Çağlar Onur <caglar@10ur.org>
Acked-by: Serge Hallyn <serge.hallyn@ubuntu.com>

Otherwise the name=systemd cgroup isn't changed to one which
the lxc-unpriv user can write to, causing the test to fail.

This allows lxc-test-unpriv and lxc-test-usernic to pass when run in an
unprivileged container with cgmanager.
Signed-off-by: Serge Hallyn <serge.hallyn@ubuntu.com>
Acked-by: Stéphane Graber <stgraber@ubuntu.com>

we actually meant to check *p not p.
Signed-off-by: Serge Hallyn <serge.hallyn@ubuntu.com>

Signed-off-by: Dwight Engen <dwight.engen@oracle.com>
Acked-by: Stéphane Graber <stgraber@ubuntu.com>

When I converted attach and enter to using move_pid_abs, these needed
to use the new get_pid_cgroup_abs method to get an absolute path.  But
for some inexplicable reason I also converted the functions which get
and set cgroup properties to use the absolute paths.  These are simply
not compatible with the cgmanager set_value and get_value methods.
This breaks for instance lxc-test-cgpath.

So undo that.  With this patch lxc-test-cgpath, lxc-test-autotest,
and lxc-test-concurrent once again pass in a nested container.
Signed-off-by: Serge Hallyn <serge.hallyn@ubuntu.com>
Acked-by: Stéphane Graber <stgraber@ubuntu.com>

Signed-off-by: Dwight Engen <dwight.engen@oracle.com>
Acked-by: Stéphane Graber <stgraber@ubuntu.com>

Signed-off-by: ChangZhuo Chen (陳昌倬) <czchen@gmail.com>
Acked-by: Stéphane Graber <stgraber@ubuntu.com>

Don't spawn a getty on /dev/console when running under libvirt-lxc
Signed-off-by: Dwight Engen <dwight.engen@oracle.com>
Signed-off-by: Serge Hallyn <serge.hallyn@ubuntu.com>

Signed-off-by: Dwight Engen <dwight.engen@oracle.com>
Acked-by: Stéphane Graber <stgraber@ubuntu.com>

Signed-off-by: Stéphane Graber <stgraber@ubuntu.com>

Update for commit 6191f4f4Signed-off-by: KATOH Yasufumi <karma@jazz.email.ne.jp>
Acked-by: Stéphane Graber <stgraber@ubuntu.com>

For years it has been best practice to use a relative path as
the mount target.  But the manpage hasn't reflect that.  Fix it.
Signed-off-by: Serge Hallyn <serge.hallyn@ubuntu.com>
Acked-by: Dwight Engen <dwight.engen@oracle.com>

when using btrfs backend lxc-create first creates rootfs in /usr/lib/lxc/rootfs
directory before moving it to /var/lib/lxc or other directory supplied by the
command line. Archlinux template relied in $rootfs_path which made containers
created with btrfs backend have lxc.rootfs set to /usr/lib/lxc/rootfs. By using
$path instead of $rootfs_path we make sure that lxc.rootfs is always correct.
Signed-off-by: Edvinas Klovas <edvinas@pnd.io>
Acked-by: Serge E. Hallyn <serge.hallyn@ubuntu.com>

Signed-off-by: S.Çağlar Onur <caglar@10ur.org>
Acked-by: Stéphane Graber <stgraber@ubuntu.com>

On older cgmanager the support was broken.  So rather than
fail container starts altogether, just keep the old lxc behavior
in this case by not using name= subsystems.
Signed-off-by: Serge Hallyn <serge.hallyn@ubuntu.com>
Acked-by: Stéphane Graber <stgraber@ubuntu.com>

commit aafea1f7 was incomplete.
Signed-off-by: KATOH Yasufumi <karma@jazz.email.ne.jp>
Acked-by: Stéphane Graber <stgraber@ubuntu.com>

Signed-off-by: Dwight Engen <dwight.engen@oracle.com>
Acked-by: Stéphane Graber <stgraber@ubuntu.com>

Signed-off-by: Dwight Engen <dwight.engen@oracle.com>
Acked-by: Stéphane Graber <stgraber@ubuntu.com>

archlinux is using systemd and systemd's configuration does not have any
services setup to handle sigpwr hook which is sent by lxc-stop command. By
enabling sigpwr service we make sure that lxc-stop will work.
Signed-off-by: Edvinas Klovas <edvinas@pnd.io>
Acked-by: Stéphane Graber <stgraber@ubuntu.com>

If an unprivileged user does 'lxc-start -n u1' in one
login session, followed by 'lxc-attach -n u1' in another
session, the attach will fail if the sessions are in different
cgroups.  The same is true of lxc-cgroup commands.

Address this by using the GetPidCgroupAbs and MovePidAbs
which work with the containers' cgroup path relative to
the cgproxy.

Since GetPidCgroupAbs is new to api version 3 in cgmanager,
use the old method if we are on an older cgmanager.
Signed-off-by: Serge Hallyn <serge.hallyn@ubuntu.com>
Tested-by: "S.Çağlar Onur" <caglar@10ur.org>
Acked-by: Stéphane Graber <stgraber@ubuntu.com>

Read /proc/self/cgroup instead of /proc/cgroups, so as to catch
named subsystems.  Otherwise the contaienrs will not be fully
moved into the container cgroups.

Also free line which was being leaked.
Signed-off-by: Serge Hallyn <serge.hallyn@ubuntu.com>
Acked-by: Stéphane Graber <stgraber@ubuntu.com>

Do this by calling the bdev->destroy() hook from a user namespace
configured as the container's.
Signed-off-by: Serge Hallyn <serge.hallyn@ubuntu.com>
Acked-by: Stéphane Graber <stgraber@ubuntu.com>

btrfs subvolume ioctls are usable by unprivileged users, so allow
unprivileged containers to reside on btrfs.

This patch does not yet enable destroy.
Signed-off-by: Serge Hallyn <serge.hallyn@ubuntu.com>
Acked-by: Stéphane Graber <stgraber@ubuntu.com>

Signed-off-by: Dwight Engen <dwight.engen@oracle.com>
Signed-off-by: Serge Hallyn <serge.hallyn@ubuntu.com>