bpf: Add setsockopt helper function to bpf

[sfrench/cifs-2.6.git] / include / uapi / linux / bpf.h

diff --git a/include/uapi/linux/bpf.h b/include/uapi/linux/bpf.h
index 94dfa9def355f7f52805bba5ade3a32c304f989a..dd43b22758d65ce98adf8f18e8a570b5b6a01145 100644 (file)
--- a/include/uapi/linux/bpf.h
+++ b/include/uapi/linux/bpf.h
@@ -82,6 +82,11 @@ enum bpf_cmd {
        BPF_PROG_ATTACH,
        BPF_PROG_DETACH,
        BPF_PROG_TEST_RUN,
+       BPF_PROG_GET_NEXT_ID,
+       BPF_MAP_GET_NEXT_ID,
+       BPF_PROG_GET_FD_BY_ID,
+       BPF_MAP_GET_FD_BY_ID,
+       BPF_OBJ_GET_INFO_BY_FD,
 };
 
 enum bpf_map_type {
@@ -115,12 +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
 };
 
@@ -209,6 +216,21 @@ union bpf_attr {
                __u32           repeat;
                __u32           duration;
        } test;
+
+       struct { /* anonymous struct used by BPF_*_GET_*_ID */
+               union {
+                       __u32           start_id;
+                       __u32           prog_id;
+                       __u32           map_id;
+               };
+               __u32           next_id;
+       };
+
+       struct { /* anonymous struct used by BPF_OBJ_GET_INFO_BY_FD */
+               __u32           bpf_fd;
+               __u32           info_len;
+               __aligned_u64   info;
+       } info;
 } __attribute__((aligned(8)));
 
 /* BPF helper function descriptions:
@@ -313,8 +335,11 @@ union bpf_attr {
  *     @flags: room for future extensions
  *     Return: 0 on success or negative error
  *
- * u64 bpf_perf_event_read(&map, index)
- *     Return: Number events read or error code
+ * u64 bpf_perf_event_read(map, flags)
+ *     read perf event counter value
+ *     @map: pointer to perf_event_array map
+ *     @flags: index of event in the map or bitmask flags
+ *     Return: value of perf event counter read or error code
  *
  * int bpf_redirect(ifindex, flags)
  *     redirect to another netdev
@@ -328,11 +353,11 @@ union bpf_attr {
  *     @skb: pointer to skb
  *     Return: realm if != 0
  *
- * int bpf_perf_event_output(ctx, map, index, data, size)
+ * int bpf_perf_event_output(ctx, map, flags, data, size)
  *     output perf raw sample
  *     @ctx: struct pt_regs*
  *     @map: pointer to perf_event_array map
- *     @index: index of event in the map
+ *     @flags: index of event in the map or bitmask flags
  *     @data: data on stack to be output as raw data
  *     @size: size of data
  *     Return: 0 on success or negative error
@@ -490,6 +515,22 @@ union bpf_attr {
  *     Get the owner uid of the socket stored inside sk_buff.
  *     @skb: pointer to skb
  *     Return: uid of the socket owner on success or overflowuid if failed.
+ *
+ * u32 bpf_set_hash(skb, hash)
+ *     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),                     \
@@ -539,7 +580,9 @@ union bpf_attr {
        FN(xdp_adjust_head),            \
        FN(probe_read_str),             \
        FN(get_socket_cookie),          \
-       FN(get_socket_uid),
+       FN(get_socket_uid),             \
+       FN(set_hash),                   \
+       FN(setsockopt),
 
 /* integer value in 'imm' field of BPF_CALL instruction selects which helper
  * function eBPF program intends to call
@@ -670,4 +713,60 @@ struct xdp_md {
        __u32 data_end;
 };
 
+#define BPF_TAG_SIZE   8
+
+struct bpf_prog_info {
+       __u32 type;
+       __u32 id;
+       __u8  tag[BPF_TAG_SIZE];
+       __u32 jited_prog_len;
+       __u32 xlated_prog_len;
+       __aligned_u64 jited_prog_insns;
+       __aligned_u64 xlated_prog_insns;
+} __attribute__((aligned(8)));
+
+struct bpf_map_info {
+       __u32 type;
+       __u32 id;
+       __u32 key_size;
+       __u32 value_size;
+       __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.
+ * 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,
+       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
+                                        */
+};
+
 #endif /* _UAPI__LINUX_BPF_H__ */