On Wed, Mar 4, 2020 at 12:42 PM Carlos Neira <cneirabustos@xxxxxxxxx> wrote: > > Currently bpf_get_current_pid_tgid(), is used to do pid filtering in bcc's > scripts but this helper returns the pid as seen by the root namespace which is > fine when a bcc script is not executed inside a container. > When the process of interest is inside a container, pid filtering will not work > if bpf_get_current_pid_tgid() is used. > This helper addresses this limitation returning the pid as it's seen by the current > namespace where the script is executing. > > In the future different pid_ns files may belong to different devices, according to the > discussion between Eric Biederman and Yonghong in 2017 Linux plumbers conference. > To address that situation the helper requires inum and dev_t from /proc/self/ns/pid. > This helper has the same use cases as bpf_get_current_pid_tgid() as it can be > used to do pid filtering even inside a container. Applied. Thanks. There was one spurious trailing whitespace that I fixed in patch 3 and missing .gitignore update for test_current_pid_tgid_new_ns. Could you please follow up with another patch to fold test_current_pid_tgid_new_ns into test_progs. I'd really like to consolidate all tests into single binary.
