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>

1 files changed, 65 insertions, 1 deletions

diff --git a/tools/include/uapi/linux/bpf.h b/tools/include/uapi/linux/bpf.h
index f94b48b168dc..284b3661f1df 100644
--- a/tools/include/uapi/linux/bpf.h
+++ b/tools/include/uapi/linux/bpf.h
@@ -120,12 +120,14 @@ enum bpf_prog_type {
         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 @@ union bpf_attr {
  *     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 @@ union bpf_attr {
         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
@@ -720,4 +734,54 @@ struct bpf_map_info {
         __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__ */