cgroups: add cgroup2 device controller support

Add a bpf-based device controller implementation.
Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com>

cgfsng: return attach fail if container stopped

Signed-off-by: LiFeng <lifeng68@huawei.com>

fix wrong order of bridge/nic in error message

Signed-off-by: Balázs Póka <poka@idata.hu>

Typo in a comment

"above" was used instead of "below"
Signed-off-by: Rachid Koucha <rachid.koucha@gmail.com>

tests: use /dev/null instead of /dev/network_latency

BugLink: https://bugs.launchpad.net/bugs/1848587

The latter device has been removed apparently.
Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com>

configure.ac: fix build on toolchain without SSP

Commit 3b5a0eeb reverted
3aa72711 resulting in lxc being unable
to be built on toolchain without SSP support

Fixes:
 - http://autobuild.buildroot.org/results/57945f54ffbc5c8764b6891a4516c4907e56ab97Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>

Update cgroup.h

Fixed the documentation to say that cgroupv2 uses a unified hierarchy
Signed-off-by: Aaditya Murthy <amurthy123@utexas.edu>

terminal: bugfixes

Closes: https://github.com/lxc/lxd/issues/6408Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com>

Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com>

lxc-usernsexec: support easily mapping own uid

Signed-off-by: Serge Hallyn <shallyn@cisco.com>

tests: add tests making sure the exit code is appropriate.

lxc2 broke this feature for lxc-execute, and lxc3 broke it for
lxc-attach. This adds a test making sure we don't do the same mistake
a third time.
Signed-off-by: Florian Margaine <florian@platform.sh>

terminal: return NULL on error in terminal_signal_init

Callers expect a NULL on error, and with PR #3171 marking
the pointer as __do_free, we now return a pointer to freed
memory here otherwise.
Signed-off-by: Wolfgang Bumiller <w.bumiller@proxmox.com>

terminal: prevent memory leak for lxc_terminal_state

Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com>

apparmor: Prevent writes to /proc/acpi/**

Same as #3117.
Signed-off-by: Wolfgang Bumiller <w.bumiller@proxmox.com>

syscall_wrappers: rename internal memfd_create to memfd_create_lxc

In case the internal memfd_create has to be used, make sure we don't
clash with the already existing memfd_create function from glibc.

This can happen if this glibc function is a stub. In this case, at
./configure time, the test for this function will return false, however
the declaration of that function is still available. This leads to
compilation errors.
Signed-off-by: Patrick Havelange <patrick.havelange@essensium.com>

lxc/tools/lxc/destroy: Restores error message on container destroy

Partially reverts 65b92ea5 so that trying to destroy a non-existent container gives an error message.
Signed-off-by: Thomas Parrott <thomas.parrott@canonical.com>

Update lxc.containers.conf(5) in Japanese

Update for commit 767bd70aSigned-off-by: KATOH Yasufumi <karma@jazz.email.ne.jp>

Bad sgml/man translation

When calling "man lxc.container.conf", an internal "man" keyword is displayed :

$ man lxc.container.conf
[...]
lxc.mount.entry
              Specify a mount point corresponding to a line in the fstab format.  Moreover lxc supports mount  propagation,  such  as
              rslave  or  rprivate, and adds three additional mount options.  optional don't fail if mount does not work.  create=dir
              or create=file to create dir (or file) when the point will be mounted.  relative source path is taken to be relative to
              the mounted container root. For instance,

dev/null proc/kcore none bind,relative 0 0
              .fi     <-----------------------------------UNEXPECTED KEYWORD !!!!

The problem seems to come from the missing blanks before "dev/null proc/kcore none bind,relative 0 0"

Moreover, for homogeneity purposes, it is better to use the "programlisting" tag used in the rest of the text instead of  "screen".
Signed-off-by: Rachid Koucha <rachid.koucha@gmail.com>

Update Japanese lxc.container.conf(5)

Update for commit 0684250fSigned-off-by: KATOH Yasufumi <karma@jazz.email.ne.jp>

Update for commit 63012bddSigned-off-by: KATOH Yasufumi <karma@jazz.email.ne.jp>

Send successful output messages to log info instead of error

Signed-off-by: Caio B. Silva <caioboffo@gmail.com>