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1 | /* -*- mode: c; c-basic-offset: 8; -*- |
2 | * vim: noexpandtab sw=8 ts=8 sts=0: | |
3 | * | |
4 | * tcp.h | |
5 | * | |
6 | * Function prototypes | |
7 | * | |
8 | * Copyright (C) 2004 Oracle. All rights reserved. | |
9 | * | |
10 | * This program is free software; you can redistribute it and/or | |
11 | * modify it under the terms of the GNU General Public | |
12 | * License as published by the Free Software Foundation; either | |
13 | * version 2 of the License, or (at your option) any later version. | |
14 | * | |
15 | * This program is distributed in the hope that it will be useful, | |
16 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
17 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
18 | * General Public License for more details. | |
19 | * | |
20 | * You should have received a copy of the GNU General Public | |
21 | * License along with this program; if not, write to the | |
22 | * Free Software Foundation, Inc., 59 Temple Place - Suite 330, | |
23 | * Boston, MA 021110-1307, USA. | |
24 | * | |
25 | */ | |
26 | ||
27 | #ifndef O2CLUSTER_TCP_H | |
28 | #define O2CLUSTER_TCP_H | |
29 | ||
30 | #include <linux/socket.h> | |
31 | #ifdef __KERNEL__ | |
32 | #include <net/sock.h> | |
33 | #include <linux/tcp.h> | |
34 | #else | |
35 | #include <sys/socket.h> | |
36 | #endif | |
37 | #include <linux/inet.h> | |
38 | #include <linux/in.h> | |
39 | ||
40 | struct o2net_msg | |
41 | { | |
42 | __be16 magic; | |
43 | __be16 data_len; | |
44 | __be16 msg_type; | |
45 | __be16 pad1; | |
46 | __be32 sys_status; | |
47 | __be32 status; | |
48 | __be32 key; | |
49 | __be32 msg_num; | |
50 | __u8 buf[0]; | |
51 | }; | |
52 | ||
d74c9803 KH |
53 | typedef int (o2net_msg_handler_func)(struct o2net_msg *msg, u32 len, void *data, |
54 | void **ret_data); | |
55 | typedef void (o2net_post_msg_handler_func)(int status, void *data, | |
56 | void *ret_data); | |
98211489 ZB |
57 | |
58 | #define O2NET_MAX_PAYLOAD_BYTES (4096 - sizeof(struct o2net_msg)) | |
59 | ||
b5dd8030 JM |
60 | /* same as hb delay, we're waiting for another node to recognize our hb */ |
61 | #define O2NET_RECONNECT_DELAY_MS_DEFAULT 2000 | |
62 | ||
17104683 SM |
63 | #define O2NET_KEEPALIVE_DELAY_MS_DEFAULT 2000 |
64 | #define O2NET_IDLE_TIMEOUT_MS_DEFAULT 30000 | |
b5dd8030 JM |
65 | |
66 | ||
98211489 ZB |
67 | /* TODO: figure this out.... */ |
68 | static inline int o2net_link_down(int err, struct socket *sock) | |
69 | { | |
70 | if (sock) { | |
71 | if (sock->sk->sk_state != TCP_ESTABLISHED && | |
72 | sock->sk->sk_state != TCP_CLOSE_WAIT) | |
73 | return 1; | |
74 | } | |
75 | ||
76 | if (err >= 0) | |
77 | return 0; | |
78 | switch (err) { | |
79 | /* ????????????????????????? */ | |
80 | case -ERESTARTSYS: | |
81 | case -EBADF: | |
82 | /* When the server has died, an ICMP port unreachable | |
83 | * message prompts ECONNREFUSED. */ | |
84 | case -ECONNREFUSED: | |
85 | case -ENOTCONN: | |
86 | case -ECONNRESET: | |
87 | case -EPIPE: | |
88 | return 1; | |
89 | } | |
90 | return 0; | |
91 | } | |
92 | ||
93 | enum { | |
94 | O2NET_DRIVER_UNINITED, | |
95 | O2NET_DRIVER_READY, | |
96 | }; | |
97 | ||
98211489 ZB |
98 | int o2net_send_message(u32 msg_type, u32 key, void *data, u32 len, |
99 | u8 target_node, int *status); | |
100 | int o2net_send_message_vec(u32 msg_type, u32 key, struct kvec *vec, | |
101 | size_t veclen, u8 target_node, int *status); | |
98211489 ZB |
102 | |
103 | int o2net_register_handler(u32 msg_type, u32 key, u32 max_len, | |
104 | o2net_msg_handler_func *func, void *data, | |
d74c9803 | 105 | o2net_post_msg_handler_func *post_func, |
98211489 ZB |
106 | struct list_head *unreg_list); |
107 | void o2net_unregister_handler_list(struct list_head *list); | |
108 | ||
3ba169cc SM |
109 | void o2net_fill_node_map(unsigned long *map, unsigned bytes); |
110 | ||
98211489 ZB |
111 | struct o2nm_node; |
112 | int o2net_register_hb_callbacks(void); | |
113 | void o2net_unregister_hb_callbacks(void); | |
114 | int o2net_start_listening(struct o2nm_node *node); | |
115 | void o2net_stop_listening(struct o2nm_node *node); | |
116 | void o2net_disconnect_node(struct o2nm_node *node); | |
828ae6af | 117 | int o2net_num_connected_peers(void); |
98211489 ZB |
118 | |
119 | int o2net_init(void); | |
120 | void o2net_exit(void); | |
98211489 | 121 | |
2309e9e0 SM |
122 | struct o2net_send_tracking; |
123 | struct o2net_sock_container; | |
124 | ||
125 | #ifdef CONFIG_DEBUG_FS | |
126 | int o2net_debugfs_init(void); | |
127 | void o2net_debugfs_exit(void); | |
128 | void o2net_debug_add_nst(struct o2net_send_tracking *nst); | |
129 | void o2net_debug_del_nst(struct o2net_send_tracking *nst); | |
130 | void o2net_debug_add_sc(struct o2net_sock_container *sc); | |
131 | void o2net_debug_del_sc(struct o2net_sock_container *sc); | |
132 | #else | |
271d772d | 133 | static inline int o2net_debugfs_init(void) |
2309e9e0 SM |
134 | { |
135 | return 0; | |
136 | } | |
271d772d | 137 | static inline void o2net_debugfs_exit(void) |
2309e9e0 SM |
138 | { |
139 | } | |
271d772d | 140 | static inline void o2net_debug_add_nst(struct o2net_send_tracking *nst) |
2309e9e0 SM |
141 | { |
142 | } | |
271d772d | 143 | static inline void o2net_debug_del_nst(struct o2net_send_tracking *nst) |
2309e9e0 SM |
144 | { |
145 | } | |
271d772d | 146 | static inline void o2net_debug_add_sc(struct o2net_sock_container *sc) |
2309e9e0 SM |
147 | { |
148 | } | |
271d772d | 149 | static inline void o2net_debug_del_sc(struct o2net_sock_container *sc) |
2309e9e0 SM |
150 | { |
151 | } | |
152 | #endif /* CONFIG_DEBUG_FS */ | |
153 | ||
98211489 | 154 | #endif /* O2CLUSTER_TCP_H */ |