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