On Thu, Mar 12, 2020 at 05:45:09PM -0700, Alexei Starovoitov wrote: > 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. Thank you very much Alexei, I'll start working on the follow up patch to add test_current_pid_tgid_new_ns into test_progs. Bests
