BugLink: https://bugs.launchpad.net/bugs/1825155

This will allow us to better support cgroup2 layouts on stable-3.0.
Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com>

The child_path variable is initialized very late in the function so jumping to
the on_error label would cause a nullderef. With the cleanup macros we can
simplify this function to simply do direct returns and avoid that whole issue.

Closes #2935.
Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com>

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

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

This adds --{disable,enable}-asan. It is disabled by default.
Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com>

Fixes: #2902
Signed-off-by: Felix Abecassis <fabecassis@nvidia.com>

Signed-off-by: Felix Abecassis <fabecassis@nvidia.com>

This hardens multi-threaded C. Without it, the implementation of thread
cancellation handlers (introduced by pthread_cleanup_push) uses a completely
unprotected function pointer on the stack. This function pointer can simplify
the exploitation of stack-based buffer overflows even if the thread in question
is never canceled.
Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com>

Avoid temporary files, speeding up builds.
Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com>

Increased reliability of backtraces.
Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com>

Apparently the name received from the tree walk is not guaranteed to have \0
byte at the end. So let's make sure we append one.
Note that this is only an issue if there are any subvolumes in the container's
rootfs.

Closes 2826.
Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com>

Callers such as LXD run post-stop hooks to perform cleanup operations on
shutdown. This can involve umount and other things. To avoid surprises with
lingering namespace references we should close all our namespace-preserving
file descriptors. We don't need them at this point anymore anyway.
Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com>

Signed-off-by: Michael Sparmann <theseven@gmx.net>

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

This reverts commit 912c4bb4.

I accidently merged this commit. The initialization is wrong.
Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com>

Signed-off-by: tomponline <tomp@tomp.uk>

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

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

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

Closes #2885.
Signed-off-by: tomponline <tomp@tomp.uk>

Closes #2885.
Signed-off-by: tomponline <tomp@tomp.uk>

Closes #2885.
Signed-off-by: tomponline <tomp@tomp.uk>

Closes #2885.
Signed-off-by: tomponline <tomp@tomp.uk>

Closes #2885.
Signed-off-by: tomponline <tomp@tomp.uk>

Closes #2885.
Signed-off-by: tomponline <tomp@tomp.uk>

Invalid warning but let's please the compiler.

Closes lxc#2885.
Signed-off-by: tomponline <tomp@tomp.uk>

Closes lxc#2885.
Signed-off-by: tomponline <tomp@tomp.uk>

liblxc has always been meant to be LGPLv2.1+ as reflected by the many
downstreams projects and bindings which are themselves under LGPLv2.1+ or other
licenses which would be incompatible with linking against a GPLv2+ library.

It's pretty normal for a library to be LGPL while binaries are GPL as a GPL
library would only ever be usable by other GPL-only projects, which isn't the
case for very many of the liblxc downstreams.

The issue here is really carelessness. None of those GPL headers were put there
intentionally, instead being wrongly copy/pasted from other parts of the
codebase which is indeed intended to be GPLv2+. This is also made clear in our
CONTRIBUTING file in this repository:

Licensing for new files:
------------------------

LXC is made of files shipped under a few different licenses.

Anything that ends up being part of the LXC library needs to be released
under LGPLv2.1+ or a license compatible with it (though the latter will
only be accepted for cases where the code originated elsewhere and was
imported into LXC).

Language bindings for the libraries need to be released under LGPLv2.1+.

Anything else (non-libraries) needs to be Free Software and needs to be
allowed to link with LGPLv2.1+ code (if needed). LXC upstream prefers
LGPLv2.1+ or GPLv2 for those.

When introducing a new file into the project, please make sure it has a
copyright header making clear under which license it's being released
and if it doesn't match the criteria described above, please explain
your decision on the lxc-devel mailing-list when submitting your patch.

This is intended to switch over files to LGPLv2.1+ to which end we have
collected ACKs from relevant people.
/* Affected People */
Christian Brauner <christian.brauner@ubuntu.com>
Donghwa Jeong <dh48.jeong@samsung.com>
Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com>
Acked-by: Donghwa Jeong <dh48.jeong@samsung.com>

liblxc has always been meant to be LGPLv2.1+ as reflected by the many
downstreams projects and bindings which are themselves under LGPLv2.1+ or other
licenses which would be incompatible with linking against a GPLv2+ library.

It's pretty normal for a library to be LGPL while binaries are GPL as a GPL
library would only ever be usable by other GPL-only projects, which isn't the
case for very many of the liblxc downstreams.

The issue here is really carelessness. None of those GPL headers were put there
intentionally, instead being wrongly copy/pasted from other parts of the
codebase which is indeed intended to be GPLv2+. This is also made clear in our
CONTRIBUTING file in this repository:

Licensing for new files:
------------------------

LXC is made of files shipped under a few different licenses.

Anything that ends up being part of the LXC library needs to be released
under LGPLv2.1+ or a license compatible with it (though the latter will
only be accepted for cases where the code originated elsewhere and was
imported into LXC).

Language bindings for the libraries need to be released under LGPLv2.1+.

Anything else (non-libraries) needs to be Free Software and needs to be
allowed to link with LGPLv2.1+ code (if needed). LXC upstream prefers
LGPLv2.1+ or GPLv2 for those.

When introducing a new file into the project, please make sure it has a
copyright header making clear under which license it's being released
and if it doesn't match the criteria described above, please explain
your decision on the lxc-devel mailing-list when submitting your patch.

This is intended to switch over files to LGPLv2.1+ to which end we have
collected ACKs from relevant people.
/* Affected People */
Christian Brauner <christian.brauner@ubuntu.com>
Donghwa Jeong <dh48.jeong@samsung.com>
Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com>
Acked-by: Donghwa Jeong <dh48.jeong@samsung.com>

liblxc has always been meant to be LGPLv2.1+ as reflected by the many
downstreams projects and bindings which are themselves under LGPLv2.1+ or other
licenses which would be incompatible with linking against a GPLv2+ library.

It's pretty normal for a library to be LGPL while binaries are GPL as a GPL
library would only ever be usable by other GPL-only projects, which isn't the
case for very many of the liblxc downstreams.

The issue here is really carelessness. None of those GPL headers were put there
intentionally, instead being wrongly copy/pasted from other parts of the
codebase which is indeed intended to be GPLv2+. This is also made clear in our
CONTRIBUTING file in this repository:

Licensing for new files:
------------------------

LXC is made of files shipped under a few different licenses.

Anything that ends up being part of the LXC library needs to be released
under LGPLv2.1+ or a license compatible with it (though the latter will
only be accepted for cases where the code originated elsewhere and was
imported into LXC).

Language bindings for the libraries need to be released under LGPLv2.1+.

Anything else (non-libraries) needs to be Free Software and needs to be
allowed to link with LGPLv2.1+ code (if needed). LXC upstream prefers
LGPLv2.1+ or GPLv2 for those.

When introducing a new file into the project, please make sure it has a
copyright header making clear under which license it's being released
and if it doesn't match the criteria described above, please explain
your decision on the lxc-devel mailing-list when submitting your patch.

This is intended to switch over files to LGPLv2.1+ to which end we have
collected ACKs from relevant people.
/* Affected People */
Christian Brauner <christian.brauner@ubuntu.com>
Donghwa Jeong <dh48.jeong@samsung.com>
Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com>
Acked-by: Donghwa Jeong <dh48.jeong@samsung.com>

liblxc has always been meant to be LGPLv2.1+ as reflected by the many
downstreams projects and bindings which are themselves under LGPLv2.1+ or other
licenses which would be incompatible with linking against a GPLv2+ library.

It's pretty normal for a library to be LGPL while binaries are GPL as a GPL
library would only ever be usable by other GPL-only projects, which isn't the
case for very many of the liblxc downstreams.

The issue here is really carelessness. None of those GPL headers were put there
intentionally, instead being wrongly copy/pasted from other parts of the
codebase which is indeed intended to be GPLv2+. This is also made clear in our
CONTRIBUTING file in this repository:

Licensing for new files:
------------------------

LXC is made of files shipped under a few different licenses.

Anything that ends up being part of the LXC library needs to be released
under LGPLv2.1+ or a license compatible with it (though the latter will
only be accepted for cases where the code originated elsewhere and was
imported into LXC).

Language bindings for the libraries need to be released under LGPLv2.1+.

Anything else (non-libraries) needs to be Free Software and needs to be
allowed to link with LGPLv2.1+ code (if needed). LXC upstream prefers
LGPLv2.1+ or GPLv2 for those.

When introducing a new file into the project, please make sure it has a
copyright header making clear under which license it's being released
and if it doesn't match the criteria described above, please explain
your decision on the lxc-devel mailing-list when submitting your patch.

This is intended to switch over files to LGPLv2.1+ to which end we have
collected ACKs from relevant people.
/* Affected People */
Christian Brauner <christian.brauner@ubuntu.com>
Donghwa Jeong <dh48.jeong@samsung.com>
Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com>
Acked-by: Donghwa Jeong <dh48.jeong@samsung.com>

Signed-off-by: Ondrej Kubik <ondrej.kubik@canonical.com>

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

Invalid warning but let's please the compiler.

Closes #2885.
Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com>

Closes #2885.
Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com>

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

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

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

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

Signed-off-by: Marco Dickert <marco@misterunknown.de>