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| author | Sargun Dhillon <sargun@sargun.me> | 2016-08-12 15:56:52 (GMT) |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2016-08-13 04:49:41 (GMT) |
| commit | 60d20f9195b260bdf0ac10c275ae9f6016f9c069 (patch) | |
| tree | 6f93dff429db884cf36aabdbb93c7ad9695904f7 /kernel/bpf/arraymap.c | |
| parent | aed704b7a634954dc28fe5c4b49db478cf2d96b7 (diff) | |
| download | linux-60d20f9195b260bdf0ac10c275ae9f6016f9c069.tar.xz | |
bpf: Add bpf_current_task_under_cgroup helper
This adds a bpf helper that's similar to the skb_in_cgroup helper to check
whether the probe is currently executing in the context of a specific
subset of the cgroupsv2 hierarchy. It does this based on membership test
for a cgroup arraymap. It is invalid to call this in an interrupt, and
it'll return an error. The helper is primarily to be used in debugging
activities for containers, where you may have multiple programs running in
a given top-level "container".
Signed-off-by: Sargun Dhillon <sargun@sargun.me>
Cc: Alexei Starovoitov <ast@kernel.org>
Cc: Daniel Borkmann <daniel@iogearbox.net>
Cc: Tejun Heo <tj@kernel.org>
Acked-by: Tejun Heo <tj@kernel.org>
Acked-by: Alexei Starovoitov <ast@kernel.org>
Acked-by: Daniel Borkmann <daniel@iogearbox.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'kernel/bpf/arraymap.c')
| -rw-r--r-- | kernel/bpf/arraymap.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/kernel/bpf/arraymap.c b/kernel/bpf/arraymap.c index 633a650..a2ac051 100644 --- a/kernel/bpf/arraymap.c +++ b/kernel/bpf/arraymap.c @@ -538,7 +538,7 @@ static int __init register_perf_event_array_map(void) } late_initcall(register_perf_event_array_map); -#ifdef CONFIG_SOCK_CGROUP_DATA +#ifdef CONFIG_CGROUPS static void *cgroup_fd_array_get_ptr(struct bpf_map *map, struct file *map_file /* not used */, int fd) |