netdev - [bpf-next PATCH v3 1/5] bpf: sk_msg add some generic helpers that may be useful from sk

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Date:   Thu, 21 May 2020 07:34:52 -0700
From:   John Fastabend <john.fastabend@...il.com>
To:     yhs@...com, ast@...nel.org, daniel@...earbox.net
Cc:     lmb@...udflare.com, bpf@...r.kernel.org, john.fastabend@...il.com,
        jakub@...udflare.com, netdev@...r.kernel.org
Subject: [bpf-next PATCH v3 1/5] bpf: sk_msg add some generic helpers that
 may be useful from sk_msg

Add these generic helpers that may be useful to use from sk_msg programs.
The helpers do not depend on ctx so we can simply add them here,

 BPF_FUNC_perf_event_output
 BPF_FUNC_get_current_uid_gid
 BPF_FUNC_get_current_pid_tgid
 BPF_FUNC_get_current_comm
 BPF_FUNC_get_current_cgroup_id
 BPF_FUNC_get_current_ancestor_cgroup_id
 BPF_FUNC_get_cgroup_classid

Acked-by: Yonghong Song <yhs@...com>
Signed-off-by: John Fastabend <john.fastabend@...il.com>
---
 net/core/filter.c |   16 ++++++++++++++++
 1 file changed, 16 insertions(+)

diff --git a/net/core/filter.c b/net/core/filter.c
index 822d662..a56046a 100644
--- a/net/core/filter.c
+++ b/net/core/filter.c
@@ -6443,6 +6443,22 @@ sk_msg_func_proto(enum bpf_func_id func_id, const struct bpf_prog *prog)
 		return &bpf_msg_push_data_proto;
 	case BPF_FUNC_msg_pop_data:
 		return &bpf_msg_pop_data_proto;
+	case BPF_FUNC_perf_event_output:
+		return &bpf_event_output_data_proto;
+	case BPF_FUNC_get_current_uid_gid:
+		return &bpf_get_current_uid_gid_proto;
+	case BPF_FUNC_get_current_pid_tgid:
+		return &bpf_get_current_pid_tgid_proto;
+#ifdef CONFIG_CGROUPS
+	case BPF_FUNC_get_current_cgroup_id:
+		return &bpf_get_current_cgroup_id_proto;
+	case BPF_FUNC_get_current_ancestor_cgroup_id:
+		return &bpf_get_current_ancestor_cgroup_id_proto;
+#endif
+#ifdef CONFIG_CGROUP_NET_CLASSID
+	case BPF_FUNC_get_cgroup_classid:
+		return &bpf_get_cgroup_classid_curr_proto;
+#endif
 	default:
 		return bpf_base_func_proto(func_id);
 	}