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-rw-r--r--net/handshake/handshake.h93
1 files changed, 93 insertions, 0 deletions
diff --git a/net/handshake/handshake.h b/net/handshake/handshake.h
new file mode 100644
index 0000000000..a48163765a
--- /dev/null
+++ b/net/handshake/handshake.h
@@ -0,0 +1,93 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * Generic netlink handshake service
+ *
+ * Author: Chuck Lever <chuck.lever@oracle.com>
+ *
+ * Copyright (c) 2023, Oracle and/or its affiliates.
+ */
+
+#ifndef _INTERNAL_HANDSHAKE_H
+#define _INTERNAL_HANDSHAKE_H
+
+/* Per-net namespace context */
+struct handshake_net {
+ spinlock_t hn_lock; /* protects next 3 fields */
+ int hn_pending;
+ int hn_pending_max;
+ struct list_head hn_requests;
+
+ unsigned long hn_flags;
+};
+
+enum hn_flags_bits {
+ HANDSHAKE_F_NET_DRAINING,
+};
+
+struct handshake_proto;
+
+/* One handshake request */
+struct handshake_req {
+ struct list_head hr_list;
+ struct rhash_head hr_rhash;
+ unsigned long hr_flags;
+ const struct handshake_proto *hr_proto;
+ struct sock *hr_sk;
+ void (*hr_odestruct)(struct sock *sk);
+
+ /* Always the last field */
+ char hr_priv[];
+};
+
+enum hr_flags_bits {
+ HANDSHAKE_F_REQ_COMPLETED,
+ HANDSHAKE_F_REQ_SESSION,
+};
+
+struct genl_info;
+
+/* Invariants for all handshake requests for one transport layer
+ * security protocol
+ */
+struct handshake_proto {
+ int hp_handler_class;
+ size_t hp_privsize;
+ unsigned long hp_flags;
+
+ int (*hp_accept)(struct handshake_req *req,
+ struct genl_info *info, int fd);
+ void (*hp_done)(struct handshake_req *req,
+ unsigned int status,
+ struct genl_info *info);
+ void (*hp_destroy)(struct handshake_req *req);
+};
+
+enum hp_flags_bits {
+ HANDSHAKE_F_PROTO_NOTIFY,
+};
+
+/* alert.c */
+int tls_alert_send(struct socket *sock, u8 level, u8 description);
+
+/* netlink.c */
+int handshake_genl_notify(struct net *net, const struct handshake_proto *proto,
+ gfp_t flags);
+struct nlmsghdr *handshake_genl_put(struct sk_buff *msg,
+ struct genl_info *info);
+struct handshake_net *handshake_pernet(struct net *net);
+
+/* request.c */
+struct handshake_req *handshake_req_alloc(const struct handshake_proto *proto,
+ gfp_t flags);
+int handshake_req_hash_init(void);
+void handshake_req_hash_destroy(void);
+void *handshake_req_private(struct handshake_req *req);
+struct handshake_req *handshake_req_hash_lookup(struct sock *sk);
+struct handshake_req *handshake_req_next(struct handshake_net *hn, int class);
+int handshake_req_submit(struct socket *sock, struct handshake_req *req,
+ gfp_t flags);
+void handshake_complete(struct handshake_req *req, unsigned int status,
+ struct genl_info *info);
+bool handshake_req_cancel(struct sock *sk);
+
+#endif /* _INTERNAL_HANDSHAKE_H */