Re: [External] Re: [PATCH] bpf: cg_skb add get classid helper

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在 2024/8/16 09:06, Martin KaFai Lau 写道:
On 8/14/24 2:50 AM, Feng zhou wrote:
From: Feng Zhou <zhoufeng.zf@xxxxxxxxxxxxx>

At cg_skb hook point, can get classid for v1 or v2, allowing
users to do more functions such as acl.

Signed-off-by: Feng Zhou <zhoufeng.zf@xxxxxxxxxxxxx>
---
  net/core/filter.c | 6 ++++++
  1 file changed, 6 insertions(+)

diff --git a/net/core/filter.c b/net/core/filter.c
index 78a6f746ea0b..d69ba589882f 100644
--- a/net/core/filter.c
+++ b/net/core/filter.c
@@ -8111,6 +8111,12 @@ cg_skb_func_proto(enum bpf_func_id func_id, const struct bpf_prog *prog)
          return &bpf_get_listener_sock_proto;
      case BPF_FUNC_skb_ecn_set_ce:
          return &bpf_skb_ecn_set_ce_proto;
+    case BPF_FUNC_get_cgroup_classid:
+        return &bpf_get_cgroup_classid_proto;
+#endif
+#ifdef CONFIG_CGROUP_NET_CLASSID
+    case BPF_FUNC_skb_cgroup_classid:
+        return &bpf_skb_cgroup_classid_proto;

With this bpf_skb_cgroup_classid_proto, is the above bpf_get_cgroup_classid_proto necessary?
The cg_skb hook must have a skb->sk.

Yes, just add bpf_skb_cgroup_classid_proto.


Please add a selftest and tag the subject with bpf-next.


Will do, thanks.

pw-bot: cr

  #endif
      default:
          return sk_filter_func_proto(func_id, prog);






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