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 | |