Move lxcbr0 setup logic into lxc.net script

Factor this out of the lxc-net.conf upstart job, so that it can be used by
init.d scripts and systemd units, too.

Part of https://launchpad.net/bugs/1312532

Signed-off-by: Martin Pitt <martin.pitt@ubuntu.com>
Acked-by: Serge E. Hallyn <serge.hallyn@ubuntu.com>
Get systemd unit dir from pkg-config

Don't install systemd unit files into $(prefix), they won't work there.
Instead, get them from systemd's pkg-config file.

Signed-off-by: Martin Pitt <martin.pitt@ubuntu.com>
Acked-by: Serge E. Hallyn <serge.hallyn@ubuntu.com>
Add systemd unit for lxc.net

This is the equivalent of the upstart lxc-net.conf to set up the LXC bridge.

This also drops "lxc.service" from tarballs. It is built source which depends
on configure options, so the statically shipped file will not work on most
systems.

https://launchpad.net/bugs/1312532

Signed-off-by: Martin Pitt <martin.pitt@ubuntu.com>
Acked-by: Serge E. Hallyn <serge.hallyn@ubuntu.com>
systemd: Ensure action() is defined

If /etc/rc.d/init.d/functions is not present or does not define an action()
function, provide a simple fallback using "echo".

Signed-off-by: Martin Pitt <martin.pitt@ubuntu.com>
Acked-by: Serge E. Hallyn <serge.hallyn@ubuntu.com>
systemd: Load AppArmor profiles if necessary/supported

On Ubuntu we need to set up the AppArmor profiles also under systemd.
Add a new helper "lxc-apparmor-load" and integrate it into lxc.service.

Signed-off-by: Martin Pitt <martin.pitt@ubuntu.com>
Acked-by: Serge E. Hallyn <serge.hallyn@ubuntu.com>
Install systemd units for Ubuntu

Signed-off-by: Martin Pitt <martin.pitt@ubuntu.com>
Acked-by: Stéphane Graber <stgraber@ubuntu.com>
doc: Add -F option to Japanese lxc-start(1)

Update for commit 476d302

Signed-off-by: KATOH Yasufumi <karma@jazz.email.ne.jp>
Acked-by: Stéphane Graber <stgraber@ubuntu.com>
doc: Change default to "-d" in Japanese lxc-start(1)

Update for commit c00f3f3

Signed-off-by: KATOH Yasufumi <karma@jazz.email.ne.jp>
Acked-by: Stéphane Graber <stgraber@ubuntu.com>
doc: Add the description of lxc.environment to Japanese lxc.container.conf(5)

Update for commit 7c66172

Signed-off-by: KATOH Yasufumi <karma@jazz.email.ne.jp>
Acked-by: Stéphane Graber <stgraber@ubuntu.com>
doc: Update the description of SELinux in Japanese lxc.container.conf(5)

Update for commit 719fae0

Signed-off-by: KATOH Yasufumi <karma@jazz.email.ne.jp>
Acked-by: Stéphane Graber <stgraber@ubuntu.com>
doc: Add 'zfs' to the parameter of -B option in lxc-create(1)

Signed-off-by: KATOH Yasufumi <karma@jazz.email.ne.jp>
Acked-by: Stéphane Graber <stgraber@ubuntu.com>
btrfs: support recursive subvolume deletion (v2)

Pull the #defines and struct definitions for btrfs into a separate
.h file to not clutter bdev.c

Implement btrfs recursive delete support

A non-root user isn't allow to do the ioctls needed for searching (as you can
verify with 'btrfs subvolume list').  So for an unprivileged user, if the
rootfs has subvolumes under it, deletion will fail.  Otherwise, it will
succeed.

Changelog: Aug 1:
  . Fix wrong objid passing when determining directory paths
  . In do_remove_btrfs_children, avoid dereferencing NULL dirid
  . Fix memleak in error case.

Signed-off-by: Serge Hallyn <serge.hallyn@ubuntu.com>
Acked-by: Stéphane Graber <stgraber@ubuntu.com>
unexpanded config file: turn into a string

Originally, we only kept a struct lxc_conf representing the current
container configuration.  This was insufficient because lxc.include's
were expanded, so a clone or a snapshot would contain the expanded
include file contents, rather than the original "lxc.include".  If
the host's include files are updated, clones and snapshots would not
inherit those updates.

To address this, we originally added a lxc_unexp_conf, which mirrored
the lxc_conf, except that lxc.include was not expanded.

This has its own cshortcomings, however,  In particular, if a lxc.include
has a lxc.cgroup setting, and you use the api to say:

c.clear_config_item("lxc.cgroup")

this is not representable in the lxc_unexp_conf.  (The original problem,
which was pointed out to me by stgraber, was slightly different, but
unlike this problem it was not unsolvable).

This patch changes the unexpanded configuration  to be a textual
representation of the configuration.  This allows us *order* the
configuration commands, which is what was not possible using the
struct lxc_conf *lxc_unexp_conf.

The write_config() now becomes a simple fwrite.  However, lxc_clone
is slightly complicated in parts, the worst of which is the need to
rewrite the network configuration if we are changing the macaddrs.

With this patch, lxc-clone and clear_config_item do the right thing.
lxc-test-saveconfig and lxc-test-clonetest both pass.

There is room for improvement - multiple calls to

c.append_config_item("lxc.network.link", "lxcbr0")

will result in multiple such lines in the configuration file.  In that
particular case it is harmless.  There may be cases where it is not.

Overall, this should be a huge improvement in terms of correctness.

Changelog: Aug 1: updated to current lxc git head.  All lxc-test* and
   python api test passed.

Signed-off-by: Serge Hallyn <serge.hallyn@ubuntu.com>
Acked-by: Stéphane Graber <stgraber@ubuntu.com>
Add lxc.net to the dist tarball

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