cgroup: Add cgroup_get_from_fd
authorMartin KaFai Lau <kafai@fb.com>
Thu, 30 Jun 2016 17:28:42 +0000 (10:28 -0700)
committerDavid S. Miller <davem@davemloft.net>
Fri, 1 Jul 2016 20:30:38 +0000 (16:30 -0400)
commit1f3fe7ebf6136c341012db9f554d4caa566fcbaa
treeec78d296ec21640777ed39c1277fa7b5b88e4169
parent6bd3847bdc3ba97e642cb9af9d16b0f056da31a2
cgroup: Add cgroup_get_from_fd

Add a helper function to get a cgroup2 from a fd.  It will be
stored in a bpf array (BPF_MAP_TYPE_CGROUP_ARRAY) which will
be introduced in the later patch.

Signed-off-by: Martin KaFai Lau <kafai@fb.com>
Cc: Alexei Starovoitov <ast@fb.com>
Cc: Daniel Borkmann <daniel@iogearbox.net>
Cc: Tejun Heo <tj@kernel.org>
Acked-by: Tejun Heo <tj@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
include/linux/cgroup.h
kernel/cgroup.c