linux/tools/testing/selftests/bpf/dev_cgroup.c, branch v4.15Mirror of https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/
https://git.shady.money/linux/atom?h=v4.152017-11-05T14:26:51Zselftests/bpf: add a test for device cgroup controller2017-11-05T14:26:51ZRoman Gushchinguro@fb.com2017-11-05T13:15:34Zurn:sha1:37f1ba0909dfa12c75f8e8ea7a2f01355ebd60f1
Add a test for device cgroup controller.
The test loads a simple bpf program which logs all
device access attempts using trace_printk() and forbids
all operations except operations with /dev/zero and
/dev/urandom.
Then the test creates and joins a test cgroup, and attaches
the bpf program to it.
Then it tries to perform some simple device operations
and checks the result:
create /dev/null (should fail)
create /dev/zero (should pass)
copy data from /dev/urandom to /dev/zero (should pass)
copy data from /dev/urandom to /dev/full (should fail)
copy data from /dev/random to /dev/zero (should fail)
Signed-off-by: Roman Gushchin <guro@fb.com>
Acked-by: Alexei Starovoitov <ast@kernel.org>
Acked-by: Tejun Heo <tj@kernel.org>
Cc: Daniel Borkmann <daniel@iogearbox.net>
Signed-off-by: David S. Miller <davem@davemloft.net>