1 /* SPDX-License-Identifier: GPL-2.0-or-later */
2 /*
3 * tcp.h
4 *
5 * Function prototypes
6 *
7 * Copyright (C) 2004 Oracle. All rights reserved.
8 */
9
10 #ifndef O2CLUSTER_TCP_H
11 #define O2CLUSTER_TCP_H
12
13 #include <linux/socket.h>
14 #ifdef __KERNEL__
15 #include <net/sock.h>
16 #include <linux/tcp.h>
17 #else
18 #include <sys/socket.h>
19 #endif
20 #include <linux/inet.h>
21 #include <linux/in.h>
22
23 struct o2net_msg
24 {
25 __be16 magic;
26 __be16 data_len;
27 __be16 msg_type;
28 __be16 pad1;
29 __be32 sys_status;
30 __be32 status;
31 __be32 key;
32 __be32 msg_num;
33 __u8 buf[];
34 };
35
36 typedef int (o2net_msg_handler_func)(struct o2net_msg *msg, u32 len, void *data,
37 void **ret_data);
38 typedef void (o2net_post_msg_handler_func)(int status, void *data,
39 void *ret_data);
40
41 #define O2NET_MAX_PAYLOAD_BYTES (4096 - sizeof(struct o2net_msg))
42
43 /* same as hb delay, we're waiting for another node to recognize our hb */
44 #define O2NET_RECONNECT_DELAY_MS_DEFAULT 2000
45
46 #define O2NET_KEEPALIVE_DELAY_MS_DEFAULT 2000
47 #define O2NET_IDLE_TIMEOUT_MS_DEFAULT 30000
48
49 #define O2NET_TCP_USER_TIMEOUT 0x7fffffff
50
51 /* TODO: figure this out.... */
52 static inline int o2net_link_down(int err, struct socket *sock)
53 {
54 if (sock) {
55 if (sock->sk->sk_state != TCP_ESTABLISHED &&
56 sock->sk->sk_state != TCP_CLOSE_WAIT)
57 return 1;
58 }
59
60 if (err >= 0)
61 return 0;
62 switch (err) {
63 /* ????????????????????????? */
64 case -ERESTARTSYS:
65 case -EBADF:
66 /* When the server has died, an ICMP port unreachable
67 * message prompts ECONNREFUSED. */
68 case -ECONNREFUSED:
69 case -ENOTCONN:
70 case -ECONNRESET:
71 case -EPIPE:
72 return 1;
73 }
74 return 0;
75 }
76
77 enum {
78 O2NET_DRIVER_UNINITED,
79 O2NET_DRIVER_READY,
80 };
81
82 int o2net_send_message(u32 msg_type, u32 key, void *data, u32 len,
83 u8 target_node, int *status);
84 int o2net_send_message_vec(u32 msg_type, u32 key, struct kvec *vec,
85 size_t veclen, u8 target_node, int *status);
86
87 int o2net_register_handler(u32 msg_type, u32 key, u32 max_len,
88 o2net_msg_handler_func *func, void *data,
89 o2net_post_msg_handler_func *post_func,
90 struct list_head *unreg_list);
91 void o2net_unregister_handler_list(struct list_head *list);
92
93 void o2net_fill_node_map(unsigned long *map, unsigned bytes);
94
95 struct o2nm_node;
96 int o2net_register_hb_callbacks(void);
97 void o2net_unregister_hb_callbacks(void);
98 int o2net_start_listening(struct o2nm_node *node);
99 void o2net_stop_listening(struct o2nm_node *node);
100 void o2net_disconnect_node(struct o2nm_node *node);
101 int o2net_num_connected_peers(void);
102
103 int o2net_init(void);
104 void o2net_exit(void);
105
106 struct o2net_send_tracking;
107 struct o2net_sock_container;
108
109 #ifdef CONFIG_DEBUG_FS
110 void o2net_debugfs_init(void);
111 void o2net_debugfs_exit(void);
112 void o2net_debug_add_nst(struct o2net_send_tracking *nst);
113 void o2net_debug_del_nst(struct o2net_send_tracking *nst);
114 void o2net_debug_add_sc(struct o2net_sock_container *sc);
115 void o2net_debug_del_sc(struct o2net_sock_container *sc);
116 #else
117 static inline void o2net_debugfs_init(void)
118 {
119 }
120 static inline void o2net_debugfs_exit(void)
121 {
122 }
123 static inline void o2net_debug_add_nst(struct o2net_send_tracking *nst)
124 {
125 }
126 static inline void o2net_debug_del_nst(struct o2net_send_tracking *nst)
127 {
128 }
129 static inline void o2net_debug_add_sc(struct o2net_sock_container *sc)
130 {
131 }
132 static inline void o2net_debug_del_sc(struct o2net_sock_container *sc)
133 {
134 }
135 #endif /* CONFIG_DEBUG_FS */
136
137 #endif /* O2CLUSTER_TCP_H */
138
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