bpf: BPF support for sock_ops

[linux.git] / include / uapi / linux / bpf.h

diff --git a/include/uapi/linux/bpf.h b/include/uapi/linux/bpf.h
index f94b48b168dcc82cbd67b916951a4699f4f675ef..01cd485ccd4f1874c411328bd68b92c2f9839915 100644 (file)
--- a/include/uapi/linux/bpf.h
+++ b/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
 };
 
@@ -720,4 +722,32 @@ 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.
+ * Some of this fields are in network (bigendian) byte order and may need
+ * to be converted before use (bpf_ntohl() defined in samples/bpf/bpf_endian.h).
+ * 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;       /* Stored in network byte order */
+       __u32 local_ip4;        /* Stored in network byte order */
+       __u32 remote_ip6[4];    /* Stored in network byte order */
+       __u32 local_ip6[4];     /* Stored in network byte order */
+       __u32 remote_port;      /* Stored in network byte order */
+       __u32 local_port;       /* stored in host byte order */
+};
+
+/* List of known BPF sock_ops operators.
+ * New entries can only be added at the end
+ */
+enum {
+       BPF_SOCK_OPS_VOID,
+};
+
 #endif /* _UAPI__LINUX_BPF_H__ */