Newly added program, context type and helper is used by tests in a
subsequent patch. Synchronize the header file.
Reviewed-by: Lorenz Bauer <l...@cloudflare.com>
Signed-off-by: Jakub Sitnicki <ja...@cloudflare.com>
---
tools/include/uapi/linux/bpf.h | 58 +++++++++++++++++++++++++++++++++-
1 file changed, 57 insertions(+), 1 deletion(-)
diff --git a/tools/include/uapi/linux/bpf.h b/tools/include/uapi/linux/bpf.h
index b5889257cc33..58ee3d24a430 100644
--- a/tools/include/uapi/linux/bpf.h
+++ b/tools/include/uapi/linux/bpf.h
@@ -173,6 +173,7 @@ enum bpf_prog_type {
BPF_PROG_TYPE_CGROUP_SYSCTL,
BPF_PROG_TYPE_RAW_TRACEPOINT_WRITABLE,
BPF_PROG_TYPE_CGROUP_SOCKOPT,
+ BPF_PROG_TYPE_INET_LOOKUP,
};
enum bpf_attach_type {
@@ -199,6 +200,7 @@ enum bpf_attach_type {
BPF_CGROUP_UDP6_RECVMSG,
BPF_CGROUP_GETSOCKOPT,
BPF_CGROUP_SETSOCKOPT,
+ BPF_INET_LOOKUP,
__MAX_BPF_ATTACH_TYPE
};
@@ -2747,6 +2749,33 @@ union bpf_attr {
* **-EOPNOTSUPP** kernel configuration does not enable SYN cookies
*
* **-EPROTONOSUPPORT** IP packet version is not 4 or 6
+ *
+ * int bpf_redirect_lookup(struct bpf_inet_lookup_kern *ctx, struct bpf_map
*sockarray, void *key, u64 flags)
+ * Description
+ * Select a socket referenced by *map* (of type
+ * **BPF_MAP_TYPE_REUSEPORT_SOCKARRAY**) at index *key* to use as a
+ * result of listening (TCP) or bound (UDP) socket lookup.
+ *
+ * The IP family and L4 protocol in *ctx* object, populated from
+ * the packet that triggered the lookup, must match the selected
+ * socket's family and protocol. IP6_V6ONLY socket option is
+ * honored.
+ *
+ * To be used by **BPF_INET_LOOKUP** programs attached to the
+ * network namespace. Program needs to return **BPF_REDIRECT**, the
+ * helper's success return value, for the selected socket to be
+ * actually used.
+ *
+ * Return
+ * **BPF_REDIRECT** on success, if the socket at index *key* was
selected.
+ *
+ * **-EINVAL** if *flags* are invalid (not zero).
+ *
+ * **-ENOENT** if there is no socket at index *key*.
+ *
+ * **-EPROTOTYPE** if *ctx->protocol* does not match the socket
protocol.
+ *
+ * **-EAFNOSUPPORT** if socket does not accept IP version in
*ctx->family*.
*/
#define __BPF_FUNC_MAPPER(FN) \
FN(unspec), \
@@ -2859,7 +2888,8 @@ union bpf_attr {
FN(sk_storage_get), \
FN(sk_storage_delete), \
FN(send_signal), \
- FN(tcp_gen_syncookie),
+ FN(tcp_gen_syncookie), \
+ FN(redirect_lookup),
/* integer value in 'imm' field of BPF_CALL instruction selects which helper
* function eBPF program intends to call
@@ -3116,6 +3146,32 @@ struct bpf_tcp_sock {
__u32 icsk_retransmits; /* Number of unrecovered [RTO] timeouts */
};
+/* User accessible data for inet_lookup programs.
+ * New fields must be added at the end.
+ */
+struct bpf_inet_lookup {
+ __u32 family; /* AF_INET, AF_INET6 */
+ __u32 protocol; /* IPROTO_TCP, IPPROTO_UDP */
+ __u32 remote_ip4; /* Allows 1,2,4-byte read but no write.
+ * Stored in network byte order.
+ */
+ __u32 local_ip4; /* Allows 1,2,4-byte read and 4-byte write.
+ * Stored in network byte order.
+ */
+ __u32 remote_ip6[4]; /* Allows 1,2,4-byte read but no write.
+ * Stored in network byte order.
+ */
+ __u32 local_ip6[4]; /* Allows 1,2,4-byte read and 4-byte write.
+ * Stored in network byte order.
+ */
+ __u32 remote_port; /* Allows 4-byte read but no write.
+ * Stored in network byte order.
+ */
+ __u32 local_port; /* Allows 4-byte read and write.
+ * Stored in host byte order.
+ */
+};
+
struct bpf_sock_tuple {
union {
struct {
--
2.20.1
