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Date: Mon, 20 Jul 2020 09:34:02 -0700
From: Yonghong Song <yhs@...com>
To: <bpf@...r.kernel.org>, <netdev@...r.kernel.org>
CC: Alexei Starovoitov <ast@...nel.org>,
Daniel Borkmann <daniel@...earbox.net>,
Jiri Olsa <jolsa@...nel.org>, <kernel-team@...com>
Subject: [PATCH bpf-next v2 4/5] bpf: make btf_sock_ids global
tcp and udp bpf_iter can reuse some socket ids in
btf_sock_ids, so make it global.
I put the extern definition in btf_ids.h as a central
place so it can be easily discovered by developers.
Signed-off-by: Yonghong Song <yhs@...com>
---
include/linux/btf_ids.h | 30 ++++++++++++++++++++++++++++++
net/core/filter.c | 30 ++----------------------------
tools/include/linux/btf_ids.h | 30 ++++++++++++++++++++++++++++++
3 files changed, 62 insertions(+), 28 deletions(-)
diff --git a/include/linux/btf_ids.h b/include/linux/btf_ids.h
index 77ab45baa095..4867d549e3c1 100644
--- a/include/linux/btf_ids.h
+++ b/include/linux/btf_ids.h
@@ -97,4 +97,34 @@ asm( \
#endif /* CONFIG_DEBUG_INFO_BTF */
+#ifdef CONFIG_NET
+/* Define a list of socket types which can be the argument for
+ * skc_to_*_sock() helpers. All these sockets should have
+ * sock_common as the first argument in its memory layout.
+ */
+#define BTF_SOCK_TYPE_xxx \
+ BTF_SOCK_TYPE(BTF_SOCK_TYPE_INET, inet_sock) \
+ BTF_SOCK_TYPE(BTF_SOCK_TYPE_INET_CONN, inet_connection_sock) \
+ BTF_SOCK_TYPE(BTF_SOCK_TYPE_INET_REQ, inet_request_sock) \
+ BTF_SOCK_TYPE(BTF_SOCK_TYPE_INET_TW, inet_timewait_sock) \
+ BTF_SOCK_TYPE(BTF_SOCK_TYPE_REQ, request_sock) \
+ BTF_SOCK_TYPE(BTF_SOCK_TYPE_SOCK, sock) \
+ BTF_SOCK_TYPE(BTF_SOCK_TYPE_SOCK_COMMON, sock_common) \
+ BTF_SOCK_TYPE(BTF_SOCK_TYPE_TCP, tcp_sock) \
+ BTF_SOCK_TYPE(BTF_SOCK_TYPE_TCP_REQ, tcp_request_sock) \
+ BTF_SOCK_TYPE(BTF_SOCK_TYPE_TCP_TW, tcp_timewait_sock) \
+ BTF_SOCK_TYPE(BTF_SOCK_TYPE_TCP6, tcp6_sock) \
+ BTF_SOCK_TYPE(BTF_SOCK_TYPE_UDP, udp_sock) \
+ BTF_SOCK_TYPE(BTF_SOCK_TYPE_UDP6, udp6_sock)
+
+enum {
+#define BTF_SOCK_TYPE(name, str) name,
+BTF_SOCK_TYPE_xxx
+#undef BTF_SOCK_TYPE
+MAX_BTF_SOCK_TYPE,
+};
+
+extern u32 btf_sock_ids[];
+#endif
+
#endif
diff --git a/net/core/filter.c b/net/core/filter.c
index 5a65fb4b95ff..654c346b7d91 100644
--- a/net/core/filter.c
+++ b/net/core/filter.c
@@ -9421,39 +9421,13 @@ void bpf_prog_change_xdp(struct bpf_prog *prev_prog, struct bpf_prog *prog)
bpf_dispatcher_change_prog(BPF_DISPATCHER_PTR(xdp), prev_prog, prog);
}
-/* Define a list of socket types which can be the argument for
- * skc_to_*_sock() helpers. All these sockets should have
- * sock_common as the first argument in its memory layout.
- */
-#define BTF_SOCK_TYPE_xxx \
- BTF_SOCK_TYPE(BTF_SOCK_TYPE_INET, inet_sock) \
- BTF_SOCK_TYPE(BTF_SOCK_TYPE_INET_CONN, inet_connection_sock) \
- BTF_SOCK_TYPE(BTF_SOCK_TYPE_INET_REQ, inet_request_sock) \
- BTF_SOCK_TYPE(BTF_SOCK_TYPE_INET_TW, inet_timewait_sock) \
- BTF_SOCK_TYPE(BTF_SOCK_TYPE_REQ, request_sock) \
- BTF_SOCK_TYPE(BTF_SOCK_TYPE_SOCK, sock) \
- BTF_SOCK_TYPE(BTF_SOCK_TYPE_SOCK_COMMON, sock_common) \
- BTF_SOCK_TYPE(BTF_SOCK_TYPE_TCP, tcp_sock) \
- BTF_SOCK_TYPE(BTF_SOCK_TYPE_TCP_REQ, tcp_request_sock) \
- BTF_SOCK_TYPE(BTF_SOCK_TYPE_TCP_TW, tcp_timewait_sock) \
- BTF_SOCK_TYPE(BTF_SOCK_TYPE_TCP6, tcp6_sock) \
- BTF_SOCK_TYPE(BTF_SOCK_TYPE_UDP, udp_sock) \
- BTF_SOCK_TYPE(BTF_SOCK_TYPE_UDP6, udp6_sock)
-
-enum {
-#define BTF_SOCK_TYPE(name, str) name,
-BTF_SOCK_TYPE_xxx
-#undef BTF_SOCK_TYPE
-MAX_BTF_SOCK_TYPE,
-};
-
#ifdef CONFIG_DEBUG_INFO_BTF
-BTF_ID_LIST(btf_sock_ids)
+BTF_ID_LIST_GLOBAL(btf_sock_ids)
#define BTF_SOCK_TYPE(name, type) BTF_ID(struct, type)
BTF_SOCK_TYPE_xxx
#undef BTF_SOCK_TYPE
#else
-static u32 btf_sock_ids[MAX_BTF_SOCK_TYPE];
+u32 btf_sock_ids[MAX_BTF_SOCK_TYPE];
#endif
static bool check_arg_btf_id(u32 btf_id, u32 arg)
diff --git a/tools/include/linux/btf_ids.h b/tools/include/linux/btf_ids.h
index 77ab45baa095..4867d549e3c1 100644
--- a/tools/include/linux/btf_ids.h
+++ b/tools/include/linux/btf_ids.h
@@ -97,4 +97,34 @@ asm( \
#endif /* CONFIG_DEBUG_INFO_BTF */
+#ifdef CONFIG_NET
+/* Define a list of socket types which can be the argument for
+ * skc_to_*_sock() helpers. All these sockets should have
+ * sock_common as the first argument in its memory layout.
+ */
+#define BTF_SOCK_TYPE_xxx \
+ BTF_SOCK_TYPE(BTF_SOCK_TYPE_INET, inet_sock) \
+ BTF_SOCK_TYPE(BTF_SOCK_TYPE_INET_CONN, inet_connection_sock) \
+ BTF_SOCK_TYPE(BTF_SOCK_TYPE_INET_REQ, inet_request_sock) \
+ BTF_SOCK_TYPE(BTF_SOCK_TYPE_INET_TW, inet_timewait_sock) \
+ BTF_SOCK_TYPE(BTF_SOCK_TYPE_REQ, request_sock) \
+ BTF_SOCK_TYPE(BTF_SOCK_TYPE_SOCK, sock) \
+ BTF_SOCK_TYPE(BTF_SOCK_TYPE_SOCK_COMMON, sock_common) \
+ BTF_SOCK_TYPE(BTF_SOCK_TYPE_TCP, tcp_sock) \
+ BTF_SOCK_TYPE(BTF_SOCK_TYPE_TCP_REQ, tcp_request_sock) \
+ BTF_SOCK_TYPE(BTF_SOCK_TYPE_TCP_TW, tcp_timewait_sock) \
+ BTF_SOCK_TYPE(BTF_SOCK_TYPE_TCP6, tcp6_sock) \
+ BTF_SOCK_TYPE(BTF_SOCK_TYPE_UDP, udp_sock) \
+ BTF_SOCK_TYPE(BTF_SOCK_TYPE_UDP6, udp6_sock)
+
+enum {
+#define BTF_SOCK_TYPE(name, str) name,
+BTF_SOCK_TYPE_xxx
+#undef BTF_SOCK_TYPE
+MAX_BTF_SOCK_TYPE,
+};
+
+extern u32 btf_sock_ids[];
+#endif
+
#endif
--
2.24.1
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