tools/testing: add a test to check nsfs ioctl-s

2016-09-23T00:59:41Z

There are two new ioctl-s: One ioctl for the user namespace that owns a file descriptor. One ioctl for the parent namespace of a namespace file descriptor. The test checks that these ioctl-s works and that they handle a case when a target namespace is outside of the current process namespace. Signed-off-by: Andrei Vagin Signed-off-by: Eric W. Biederman

kernel/tools/testing/selftests/nsfs, branch linux-4.9.y

tools/testing: add a test to check nsfs ioctl-s