bpf: update tools/include/uapi/linux/bpf.h

Update tools/include/uapi/linux/bpf.h to include changes related to new bpf sock_ops program type. Signed-off-by: Lawrence Brakmo <brakmo@fb.com> Signed-off-by: David S. Miller <davem@davemloft.net>

bpf: update tools/include/uapi/linux/bpf.h
Update tools/include/uapi/linux/bpf.h to include changes related to new bpf sock_ops program type. Signed-off-by: Lawrence Brakmo <brakmo@fb.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Lawrence Brakmo · David S. Miller
1 parent 6c4a01b278
Showing 1 changed file with 65 additions and 1 deletions Side-by-side Diff
tools/include/uapi/linux/bpf.h
@@ -120,12 +120,14 @@
 	BPF_PROG_TYPE_LWT_IN,
 	BPF_PROG_TYPE_LWT_OUT,
 	BPF_PROG_TYPE_LWT_XMIT,
+	BPF_PROG_TYPE_SOCK_OPS,
 };
  
 enum bpf_attach_type {
 	BPF_CGROUP_INET_INGRESS,
 	BPF_CGROUP_INET_EGRESS,
 	BPF_CGROUP_INET_SOCK_CREATE,
+	BPF_CGROUP_SOCK_OPS,
 	__MAX_BPF_ATTACH_TYPE
 };
  
@@ -518,6 +520,17 @@
  *     Set full skb->hash.
  *     @skb: pointer to skb
  *     @hash: hash to set
+ *
+ * int bpf_setsockopt(bpf_socket, level, optname, optval, optlen)
+ *     Calls setsockopt. Not all opts are available, only those with
+ *     integer optvals plus TCP_CONGESTION.
+ *     Supported levels: SOL_SOCKET and IPROTO_TCP
+ *     @bpf_socket: pointer to bpf_socket
+ *     @level: SOL_SOCKET or IPROTO_TCP
+ *     @optname: option name
+ *     @optval: pointer to option value
+ *     @optlen: length of optval in byes
+ *     Return: 0 or negative error
  */
 #define __BPF_FUNC_MAPPER(FN)		\
 	FN(unspec),			\
@@ -568,7 +581,8 @@
 	FN(probe_read_str),		\
 	FN(get_socket_cookie),		\
 	FN(get_socket_uid),		\
-	FN(set_hash),
+	FN(set_hash),			\
+	FN(setsockopt),
  
 /* integer value in 'imm' field of BPF_CALL instruction selects which helper
  * function eBPF program intends to call
@@ -719,6 +733,56 @@
 	__u32 max_entries;
 	__u32 map_flags;
 } __attribute__((aligned(8)));
+
+/* User bpf_sock_ops struct to access socket values and specify request ops
+ * and their replies.
+ * New fields can only be added at the end of this structure
+ */
+struct bpf_sock_ops {
+	__u32 op;
+	union {
+		__u32 reply;
+		__u32 replylong[4];
+	};
+	__u32 family;
+	__u32 remote_ip4;
+	__u32 local_ip4;
+	__u32 remote_ip6[4];
+	__u32 local_ip6[4];
+	__u32 remote_port;
+	__u32 local_port;
+};
+
+/* List of known BPF sock_ops operators.
+ * New entries can only be added at the end
+ */
+enum {
+	BPF_SOCK_OPS_VOID,
+	BPF_SOCK_OPS_TIMEOUT_INIT,	/* Should return SYN-RTO value to use or
+					 * -1 if default value should be used
+					 */
+	BPF_SOCK_OPS_RWND_INIT,		/* Should return initial advertized
+					 * window (in packets) or -1 if default
+					 * value should be used
+					 */
+	BPF_SOCK_OPS_TCP_CONNECT_CB,	/* Calls BPF program right before an
+					 * active connection is initialized
+					 */
+	BPF_SOCK_OPS_ACTIVE_ESTABLISHED_CB,	/* Calls BPF program when an
+						 * active connection is
+						 * established
+						 */
+	BPF_SOCK_OPS_PASSIVE_ESTABLISHED_CB,	/* Calls BPF program when a
+						 * passive connection is
+						 * established
+						 */
+	BPF_SOCK_OPS_NEEDS_ECN,		/* If connection's congestion control
+					 * needs ECN
+					 */
+};
+
+#define TCP_BPF_IW		1001	/* Set TCP initial congestion window */
+#define TCP_BPF_SNDCWND_CLAMP	1002	/* Set sndcwnd_clamp */
  
 #endif /* _UAPI__LINUX_BPF_H__ */
...	...	@@ -120,12 +120,14 @@
120	120	BPF_PROG_TYPE_LWT_IN,
121	121	BPF_PROG_TYPE_LWT_OUT,
122	122	BPF_PROG_TYPE_LWT_XMIT,
	123	+ BPF_PROG_TYPE_SOCK_OPS,
123	124	};
124	125
125	126	enum bpf_attach_type {
126	127	BPF_CGROUP_INET_INGRESS,
127	128	BPF_CGROUP_INET_EGRESS,
128	129	BPF_CGROUP_INET_SOCK_CREATE,
	130	+ BPF_CGROUP_SOCK_OPS,
129	131	__MAX_BPF_ATTACH_TYPE
130	132	};
131	133
...	...	@@ -518,6 +520,17 @@
518	520	* Set full skb->hash.
519	521	* @skb: pointer to skb
520	522	* @hash: hash to set
	523	+ *
	524	+ * int bpf_setsockopt(bpf_socket, level, optname, optval, optlen)
	525	+ * Calls setsockopt. Not all opts are available, only those with
	526	+ * integer optvals plus TCP_CONGESTION.
	527	+ * Supported levels: SOL_SOCKET and IPROTO_TCP
	528	+ * @bpf_socket: pointer to bpf_socket
	529	+ * @level: SOL_SOCKET or IPROTO_TCP
	530	+ * @optname: option name
	531	+ * @optval: pointer to option value
	532	+ * @optlen: length of optval in byes
	533	+ * Return: 0 or negative error
521	534	*/
522	535	#define __BPF_FUNC_MAPPER(FN) \
523	536	FN(unspec), \
...	...	@@ -568,7 +581,8 @@
568	581	FN(probe_read_str), \
569	582	FN(get_socket_cookie), \
570	583	FN(get_socket_uid), \
571		- FN(set_hash),
	584	+ FN(set_hash), \
	585	+ FN(setsockopt),
572	586
573	587	/* integer value in 'imm' field of BPF_CALL instruction selects which helper
574	588	* function eBPF program intends to call
...	...	@@ -719,6 +733,56 @@
719	733	__u32 max_entries;
720	734	__u32 map_flags;
721	735	} __attribute__((aligned(8)));
	736	+
	737	+/* User bpf_sock_ops struct to access socket values and specify request ops
	738	+ * and their replies.
	739	+ * New fields can only be added at the end of this structure
	740	+ */
	741	+struct bpf_sock_ops {
	742	+ __u32 op;
	743	+ union {
	744	+ __u32 reply;
	745	+ __u32 replylong[4];
	746	+ };
	747	+ __u32 family;
	748	+ __u32 remote_ip4;
	749	+ __u32 local_ip4;
	750	+ __u32 remote_ip6[4];
	751	+ __u32 local_ip6[4];
	752	+ __u32 remote_port;
	753	+ __u32 local_port;
	754	+};
	755	+
	756	+/* List of known BPF sock_ops operators.
	757	+ * New entries can only be added at the end
	758	+ */
	759	+enum {
	760	+ BPF_SOCK_OPS_VOID,
	761	+ BPF_SOCK_OPS_TIMEOUT_INIT, /* Should return SYN-RTO value to use or
	762	+ * -1 if default value should be used
	763	+ */
	764	+ BPF_SOCK_OPS_RWND_INIT, /* Should return initial advertized
	765	+ * window (in packets) or -1 if default
	766	+ * value should be used
	767	+ */
	768	+ BPF_SOCK_OPS_TCP_CONNECT_CB, /* Calls BPF program right before an
	769	+ * active connection is initialized
	770	+ */
	771	+ BPF_SOCK_OPS_ACTIVE_ESTABLISHED_CB, /* Calls BPF program when an
	772	+ * active connection is
	773	+ * established
	774	+ */
	775	+ BPF_SOCK_OPS_PASSIVE_ESTABLISHED_CB, /* Calls BPF program when a
	776	+ * passive connection is
	777	+ * established
	778	+ */
	779	+ BPF_SOCK_OPS_NEEDS_ECN, /* If connection's congestion control
	780	+ * needs ECN
	781	+ */
	782	+};
	783	+
	784	+#define TCP_BPF_IW 1001 /* Set TCP initial congestion window */
	785	+#define TCP_BPF_SNDCWND_CLAMP 1002 /* Set sndcwnd_clamp */
722	786
723	787	#endif /* _UAPI__LINUX_BPF_H__ */