1 /* SPDX-License-Identifier: GPL-2.0-or-later */ 2 /* -*- mode: c; c-basic-offset: 8; -*- 3 * vim: noexpandtab sw=8 ts=8 sts=0: 4 * 5 * tcp.h 6 * 7 * Function prototypes 8 * 9 * Copyright (C) 2004 Oracle. All rights reserved. 10 */ 11 12 #ifndef O2CLUSTER_TCP_H 13 #define O2CLUSTER_TCP_H 14 15 #include <linux/socket.h> 16 #ifdef __KERNEL__ 17 #include <net/sock.h> 18 #include <linux/tcp.h> 19 #else 20 #include <sys/socket.h> 21 #endif 22 #include <linux/inet.h> 23 #include <linux/in.h> 24 25 struct o2net_msg 26 { 27 __be16 magic; 28 __be16 data_len; 29 __be16 msg_type; 30 __be16 pad1; 31 __be32 sys_status; 32 __be32 status; 33 __be32 key; 34 __be32 msg_num; 35 __u8 buf[0]; 36 }; 37 38 typedef int (o2net_msg_handler_func)(struct o2net_msg *msg, u32 len, void *data, 39 void **ret_data); 40 typedef void (o2net_post_msg_handler_func)(int status, void *data, 41 void *ret_data); 42 43 #define O2NET_MAX_PAYLOAD_BYTES (4096 - sizeof(struct o2net_msg)) 44 45 /* same as hb delay, we're waiting for another node to recognize our hb */ 46 #define O2NET_RECONNECT_DELAY_MS_DEFAULT 2000 47 48 #define O2NET_KEEPALIVE_DELAY_MS_DEFAULT 2000 49 #define O2NET_IDLE_TIMEOUT_MS_DEFAULT 30000 50 51 #define O2NET_TCP_USER_TIMEOUT 0x7fffffff 52 53 /* TODO: figure this out.... */ 54 static inline int o2net_link_down(int err, struct socket *sock) 55 { 56 if (sock) { 57 if (sock->sk->sk_state != TCP_ESTABLISHED && 58 sock->sk->sk_state != TCP_CLOSE_WAIT) 59 return 1; 60 } 61 62 if (err >= 0) 63 return 0; 64 switch (err) { 65 /* ????????????????????????? */ 66 case -ERESTARTSYS: 67 case -EBADF: 68 /* When the server has died, an ICMP port unreachable 69 * message prompts ECONNREFUSED. */ 70 case -ECONNREFUSED: 71 case -ENOTCONN: 72 case -ECONNRESET: 73 case -EPIPE: 74 return 1; 75 } 76 return 0; 77 } 78 79 enum { 80 O2NET_DRIVER_UNINITED, 81 O2NET_DRIVER_READY, 82 }; 83 84 int o2net_send_message(u32 msg_type, u32 key, void *data, u32 len, 85 u8 target_node, int *status); 86 int o2net_send_message_vec(u32 msg_type, u32 key, struct kvec *vec, 87 size_t veclen, u8 target_node, int *status); 88 89 int o2net_register_handler(u32 msg_type, u32 key, u32 max_len, 90 o2net_msg_handler_func *func, void *data, 91 o2net_post_msg_handler_func *post_func, 92 struct list_head *unreg_list); 93 void o2net_unregister_handler_list(struct list_head *list); 94 95 void o2net_fill_node_map(unsigned long *map, unsigned bytes); 96 97 struct o2nm_node; 98 int o2net_register_hb_callbacks(void); 99 void o2net_unregister_hb_callbacks(void); 100 int o2net_start_listening(struct o2nm_node *node); 101 void o2net_stop_listening(struct o2nm_node *node); 102 void o2net_disconnect_node(struct o2nm_node *node); 103 int o2net_num_connected_peers(void); 104 105 int o2net_init(void); 106 void o2net_exit(void); 107 108 struct o2net_send_tracking; 109 struct o2net_sock_container; 110 111 #ifdef CONFIG_DEBUG_FS 112 void o2net_debugfs_init(void); 113 void o2net_debugfs_exit(void); 114 void o2net_debug_add_nst(struct o2net_send_tracking *nst); 115 void o2net_debug_del_nst(struct o2net_send_tracking *nst); 116 void o2net_debug_add_sc(struct o2net_sock_container *sc); 117 void o2net_debug_del_sc(struct o2net_sock_container *sc); 118 #else 119 static inline void o2net_debugfs_init(void) 120 { 121 } 122 static inline void o2net_debugfs_exit(void) 123 { 124 } 125 static inline void o2net_debug_add_nst(struct o2net_send_tracking *nst) 126 { 127 } 128 static inline void o2net_debug_del_nst(struct o2net_send_tracking *nst) 129 { 130 } 131 static inline void o2net_debug_add_sc(struct o2net_sock_container *sc) 132 { 133 } 134 static inline void o2net_debug_del_sc(struct o2net_sock_container *sc) 135 { 136 } 137 #endif /* CONFIG_DEBUG_FS */ 138 139 #endif /* O2CLUSTER_TCP_H */ 140