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| author |   David S. Miller <davem@davemloft.net> | 2020-03-30 19:52:37 -0700 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2020-03-30 19:52:37 -0700 |
| commit | ed52f2c608c9451fa2bad298b2ab927416105d65 (patch) | |
| tree | d624be01447b5d578aa79b02b37f0023a867bb42 /kernel/bpf/helpers.c | |
| parent | hv_netvsc: Remove unnecessary round_up for recv_completion_cnt (diff) | |
| parent | Merge branch 'cgroup-bpf_link' (diff) | |
| download | linux-dev-ed52f2c608c9451fa2bad298b2ab927416105d65.tar.xz linux-dev-ed52f2c608c9451fa2bad298b2ab927416105d65.zip | |
Merge git://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'kernel/bpf/helpers.c')
| -rw-r--r-- | kernel/bpf/helpers.c | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/kernel/bpf/helpers.c b/kernel/bpf/helpers.c index 01878db15eaf..bafc53ddd350 100644 --- a/kernel/bpf/helpers.c +++ b/kernel/bpf/helpers.c @@ -340,6 +340,24 @@ const struct bpf_func_proto bpf_get_current_cgroup_id_proto = { .ret_type = RET_INTEGER, }; +BPF_CALL_1(bpf_get_current_ancestor_cgroup_id, int, ancestor_level) +{ + struct cgroup *cgrp = task_dfl_cgroup(current); + struct cgroup *ancestor; + + ancestor = cgroup_ancestor(cgrp, ancestor_level); + if (!ancestor) + return 0; + return cgroup_id(ancestor); +} + +const struct bpf_func_proto bpf_get_current_ancestor_cgroup_id_proto = { + .func = bpf_get_current_ancestor_cgroup_id, + .gpl_only = false, + .ret_type = RET_INTEGER, + .arg1_type = ARG_ANYTHING, +}; + #ifdef CONFIG_CGROUP_BPF DECLARE_PER_CPU(struct bpf_cgroup_storage*, bpf_cgroup_storage[MAX_BPF_CGROUP_STORAGE_TYPE]); |