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| author | Aditya Kali <adityakali@google.com> | 2016-01-29 02:54:06 -0600 |
|---|---|---|
| committer | Tejun Heo <tj@kernel.org> | 2016-02-16 13:04:58 -0500 |
| commit | a79a908fd2b080977b45bf103184b81c9d11ad07 (patch) | |
| tree | fbfb2423937d1ff6ff72e5ca9fa852b0c8d7da98 /kernel/fork.c | |
| parent | 5e2bec7c2248ae27c5b16cd97215ae05c1d39179 (diff) | |
| download | lwn-a79a908fd2b080977b45bf103184b81c9d11ad07.tar.gz lwn-a79a908fd2b080977b45bf103184b81c9d11ad07.zip | |
cgroup: introduce cgroup namespaces
Introduce the ability to create new cgroup namespace. The newly created
cgroup namespace remembers the cgroup of the process at the point
of creation of the cgroup namespace (referred as cgroupns-root).
The main purpose of cgroup namespace is to virtualize the contents
of /proc/self/cgroup file. Processes inside a cgroup namespace
are only able to see paths relative to their namespace root
(unless they are moved outside of their cgroupns-root, at which point
they will see a relative path from their cgroupns-root).
For a correctly setup container this enables container-tools
(like libcontainer, lxc, lmctfy, etc.) to create completely virtualized
containers without leaking system level cgroup hierarchy to the task.
This patch only implements the 'unshare' part of the cgroupns.
Signed-off-by: Aditya Kali <adityakali@google.com>
Signed-off-by: Serge Hallyn <serge.hallyn@canonical.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
Diffstat (limited to 'kernel/fork.c')
| -rw-r--r-- | kernel/fork.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/kernel/fork.c b/kernel/fork.c index 2e391c754ae7..6611a6267949 100644 --- a/kernel/fork.c +++ b/kernel/fork.c @@ -1884,7 +1884,7 @@ static int check_unshare_flags(unsigned long unshare_flags) if (unshare_flags & ~(CLONE_THREAD|CLONE_FS|CLONE_NEWNS|CLONE_SIGHAND| CLONE_VM|CLONE_FILES|CLONE_SYSVSEM| CLONE_NEWUTS|CLONE_NEWIPC|CLONE_NEWNET| - CLONE_NEWUSER|CLONE_NEWPID)) + CLONE_NEWUSER|CLONE_NEWPID|CLONE_NEWCGROUP)) return -EINVAL; /* * Not implemented, but pretend it works if there is nothing |