...fixes a trivial copy&paste error.
Signed-off-by: NRichard Weinberger <richard@nod.at>

Earlier commit f7e8653f dropped support for using LXC with
kernels having single-instance devpts filesystem from the
LXC controller. It forgot to remove the same code from the
LXC container setup.
Signed-off-by: NDaniel P. Berrange <berrange@redhat.com>

After commit c131525b
"Auto-add a root <filesystem> element to LXC containers on startup"
for libvirt lxc, root must be existent.
Signed-off-by: NGao feng <gaofeng@cn.fujitsu.com>

Re-add the selinux header to lxc_container.c since other
functions now use it, beyond the patch that was just
reverted.
Signed-off-by: NDaniel P. Berrange <berrange@redhat.com>

This reverts commit 940c6f10.

Before trying to mount the selinux filesystem in a container
use is_selinux_enabled() to check if the machine actually
has selinux support (eg not booted with selinux=0)
Signed-off-by: NDaniel P. Berrange <berrange@redhat.com>

During startup, the LXC driver uses paths such as

  /.oldroot/var/run/libvirt/lxc/...

to access directories from the previous root filesystem
after doing a pivot_root(). Unfortunately if /var/run
is an absolute symlink to /run, instead of a relative
symlink to ../run, these paths break.

At least one Linux distro is known to use an absolute
symlink for /var/run, so workaround this, by resolving
all symlinks before doing the pivot_root().
Signed-off-by: NDaniel P. Berrange <berrange@redhat.com>

We do not want to allow contained applications to be able to read fusefs_t.
So we want /proc/meminfo label to match the system default proc_t.

Fix checking of error codes

The lxcContainerMountAllFS method had a 'bool skipRoot'
flag to control whether it mounts the / filesystem. Since
removal of the non-pivot root container setup codepaths,
this flag is obsolete as the only caller always passes
'true'.
Signed-off-by: NDaniel P. Berrange <berrange@redhat.com>

Many methods accept a string parameter specifying the
old root directory prefix. Since removal of the non-pivot
root container setup codepaths, this parameter is obsolete
in many methods where the callers always pass "/.oldroot".
Signed-off-by: NDaniel P. Berrange <berrange@redhat.com>

The lxcContainerMountBasicFS method had a 'bool pivotRoot'
flag to control whether it mounted a private /dev. Since
removal of the non-pivot root container setup codepaths,
this flag is obsolete as the only caller always passes
'true'.
Signed-off-by: NDaniel P. Berrange <berrange@redhat.com>

The source code base needs to be adapted as well. Some files
include virutil.h just for the string related functions (here,
the include is substituted to match the new file), some include
virutil.h without any need (here, the include is removed), and
some require both.

The LXC driver currently has code to detect cgroups mounts
and then re-mount them inside the new root filesystem. Replace
this fragile code with a call to virCgroupIsolateMount.
Signed-off-by: NDaniel P. Berrange <berrange@redhat.com>

If the user requests a mount for /run, this may hide any existing
mounts that are lower down in /run. The result is that the
container still sees the mounts in /proc/mounts, but cannot
access them

sh-4.2# df
df: '/run/user/501/gvfs': No such file or directory
df: '/run/media/berrange/LIVE': No such file or directory
df: '/run/media/berrange/SecureDiskA1': No such file or directory
df: '/run/libvirt/lxc/sandbox': No such file or directory
Filesystem                      1K-blocks      Used Available Use% Mounted on
/dev/mapper/vg_t500wlan-lv_root 151476396 135390200   8384900  95% /
tmpfs                             1970888      3204   1967684   1% /run
/dev/sda1                          194241    155940     28061  85% /boot
devfs                                  64         0        64   0% /dev
tmpfs                                  64         0        64   0% /sys/fs/cgroup
tmpfs                             1970888      1200   1969688   1% /etc/libvirt-sandbox/scratch

Before mounting any filesystem at a particular location, we
must recursively unmount anything at or below the target mount
point
Signed-off-by: NDaniel P. Berrange <berrange@redhat.com>

Ensure lxcContainerUnmountSubtree is at the top of the
lxc_container.c file so it is easily referenced from
any other method. No functional change
Signed-off-by: NDaniel P. Berrange <berrange@redhat.com>

This allows a container-type domain to have exclusive access to one of
the host's NICs.

Wire <hostdev caps=net> with the lxc_controller - when moving the newly
created veth devices into a new namespace, also look for any hostdev
devices that should be moved. Note: once the container domain has been
destroyed, there is no code that moves the interfaces back to the
original namespace. This does happen, though, probably due to default
cleanup on namespace destruction.
Signed-off-by: NBogdan Purcareata <bogdan.purcareata@freescale.com>

Currently the LXC container code has two codepaths, depending on
whether there is a <filesystem> element with a target path of '/'.
If we automatically add a <filesystem> device with src=/ and dst=/,
for any container which has not specified a root filesystem, then
we only need one codepath for setting up the filesystem.
Signed-off-by: NDaniel P. Berrange <berrange@redhat.com>

For a root filesystem with type=file or type=block, the LXC
container was forgetting to actually mount it, before doing
the pivot root step.
Signed-off-by: NDaniel P. Berrange <berrange@redhat.com>

Currently the lxc controller sets up the devpts instance on
$rootfsdef->src, but this only works if $rootfsdef is using
type=mount. To support type=block or type=file for the root
filesystem, we must use /var/lib/libvirt/lxc/$NAME.devpts
for the temporary devpts mount in the controller

Instead of using /var/lib/libvirt/lxc/$NAME for the FUSE
filesystem, use /var/lib/libvirt/lxc/$NAME.fuse. This allows
room for other temporary mounts in the same directory

these were missed by 63f18f37

In the LXC container startup code when switching stdio
streams, we call VIR_FORCE_CLOSE on all FDs. This triggers
a huge number of warnings, but we don't see them because
stdio is closed at this point. strace() however shows them
which can confuse people debugging the code. Switch to
VIR_MASS_CLOSE to avoid this
Signed-off-by: NDaniel P. Berrange <berrange@redhat.com>

libvirt lxc will fail to start when selinux is disabled.
error: Failed to start domain noroot
error: internal error guest failed to start: PATH=/bin:/sbin TERM=linux container=lxc-libvirt container_uuid=b9873916-3516-c199-8112-1592ff694a9e LIBVIRT_LXC_UUID=b9873916-3516-c199-8112-1592ff694a9e LIBVIRT_LXC_NAME=noroot /bin/sh
2013-01-09 11:04:05.384+0000: 1: info : libvirt version: 1.0.1
2013-01-09 11:04:05.384+0000: 1: error : lxcContainerMountBasicFS:546 : Failed to mkdir /sys/fs/selinux: No such file or directory
2013-01-09 11:04:05.384+0000: 7536: info : libvirt version: 1.0.1
2013-01-09 11:04:05.384+0000: 7536: error : virLXCControllerRun:1466 : error receiving signal from container: Input/output error
2013-01-09 11:04:05.404+0000: 7536: error : virCommandWait:2287 : internal error Child process (ip link del veth1) unexpected exit status 1: Cannot find device "veth1"

fix this problem by checking if selinuxfs is mounted
in host before we try to create dir /sys/fs/selinux.
Signed-off-by: NGao feng <gaofeng@cn.fujitsu.com>

Signed-off-by: NDaniel P. Berrange <berrange@redhat.com>

Signed-off-by: NDaniel P. Berrange <berrange@redhat.com>

Signed-off-by: NDaniel P. Berrange <berrange@redhat.com>

when we has no host's src mapped to container.
there is no .oldroot dir,so libvirt lxc will fail
to start when mouting meminfo.

in this case,the parameter srcprefix of function
lxcContainerMountProcFuse should be NULL.and make
this method handle NULL correctly.
Signed-off-by: NGao feng <gaofeng@cn.fujitsu.com>

If running on older Linux without mounted cgroups then its possible that
*root would be NULL.

Convert the host capabilities and domain config structs to
use the virArch datatype. Update the parsers and all drivers
to take account of datatype change
Signed-off-by: NDaniel P. Berrange <berrange@redhat.com>