13 Aug, 2016

1 commit

• 9e6e60ecb   samples/bpf: Add test_current_task_under_cgroup test ... Browse Code »

  This test has a BPF program which writes the last known pid to call the
  sync syscall within a given cgroup to a map.

  The user mode program creates its own mount namespace, and mounts the
  cgroupsv2 hierarchy in there, as on all current test systems
  (Ubuntu 16.04, Debian), the cgroupsv2 vfs is unmounted by default.
  Once it does this, it proceeds to test.

  The test checks for positive and negative condition. It ensures that
  when it's part of a given cgroup, its pid is captured in the map,
  and that when it leaves the cgroup, this doesn't happen.

  It populate a cgroups arraymap prior to execution in userspace. This means
  that the program must be run in the same cgroups namespace as the programs
  that are being traced.

  Signed-off-by: Sargun Dhillon
  Cc: Alexei Starovoitov
  Cc: Daniel Borkmann
  Cc: Tejun Heo
  Acked-by: Alexei Starovoitov
  Signed-off-by: David S. Miller

  Sargun Dhillon

  2016-08-13 12:49:42 +0800