156 lines
4 KiB
C
156 lines
4 KiB
C
/* -*- mode: c; c-basic-offset: 8; -*-
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* vim: noexpandtab sw=8 ts=8 sts=0:
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*
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* tcp.h
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*
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* Function prototypes
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*
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* Copyright (C) 2004 Oracle. All rights reserved.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public
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* License along with this program; if not, write to the
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* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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* Boston, MA 021110-1307, USA.
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*
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*/
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#ifndef O2CLUSTER_TCP_H
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#define O2CLUSTER_TCP_H
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#include <linux/socket.h>
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#ifdef __KERNEL__
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#include <net/sock.h>
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#include <linux/tcp.h>
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#else
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#include <sys/socket.h>
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#endif
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#include <linux/inet.h>
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#include <linux/in.h>
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struct o2net_msg
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{
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__be16 magic;
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__be16 data_len;
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__be16 msg_type;
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__be16 pad1;
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__be32 sys_status;
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__be32 status;
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__be32 key;
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__be32 msg_num;
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__u8 buf[0];
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};
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typedef int (o2net_msg_handler_func)(struct o2net_msg *msg, u32 len, void *data,
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void **ret_data);
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typedef void (o2net_post_msg_handler_func)(int status, void *data,
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void *ret_data);
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#define O2NET_MAX_PAYLOAD_BYTES (4096 - sizeof(struct o2net_msg))
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/* same as hb delay, we're waiting for another node to recognize our hb */
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#define O2NET_RECONNECT_DELAY_MS_DEFAULT 2000
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#define O2NET_KEEPALIVE_DELAY_MS_DEFAULT 2000
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#define O2NET_IDLE_TIMEOUT_MS_DEFAULT 30000
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#define O2NET_TCP_USER_TIMEOUT 0x7fffffff
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/* TODO: figure this out.... */
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static inline int o2net_link_down(int err, struct socket *sock)
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{
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if (sock) {
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if (sock->sk->sk_state != TCP_ESTABLISHED &&
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sock->sk->sk_state != TCP_CLOSE_WAIT)
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return 1;
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}
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if (err >= 0)
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return 0;
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switch (err) {
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/* ????????????????????????? */
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case -ERESTARTSYS:
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case -EBADF:
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/* When the server has died, an ICMP port unreachable
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* message prompts ECONNREFUSED. */
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case -ECONNREFUSED:
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case -ENOTCONN:
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case -ECONNRESET:
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case -EPIPE:
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return 1;
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}
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return 0;
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}
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enum {
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O2NET_DRIVER_UNINITED,
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O2NET_DRIVER_READY,
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};
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int o2net_send_message(u32 msg_type, u32 key, void *data, u32 len,
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u8 target_node, int *status);
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int o2net_send_message_vec(u32 msg_type, u32 key, struct kvec *vec,
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size_t veclen, u8 target_node, int *status);
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int o2net_register_handler(u32 msg_type, u32 key, u32 max_len,
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o2net_msg_handler_func *func, void *data,
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o2net_post_msg_handler_func *post_func,
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struct list_head *unreg_list);
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void o2net_unregister_handler_list(struct list_head *list);
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void o2net_fill_node_map(unsigned long *map, unsigned bytes);
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struct o2nm_node;
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int o2net_register_hb_callbacks(void);
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void o2net_unregister_hb_callbacks(void);
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int o2net_start_listening(struct o2nm_node *node);
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void o2net_stop_listening(struct o2nm_node *node);
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void o2net_disconnect_node(struct o2nm_node *node);
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int o2net_num_connected_peers(void);
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int o2net_init(void);
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void o2net_exit(void);
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struct o2net_send_tracking;
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struct o2net_sock_container;
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#ifdef CONFIG_DEBUG_FS
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int o2net_debugfs_init(void);
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void o2net_debugfs_exit(void);
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void o2net_debug_add_nst(struct o2net_send_tracking *nst);
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void o2net_debug_del_nst(struct o2net_send_tracking *nst);
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void o2net_debug_add_sc(struct o2net_sock_container *sc);
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void o2net_debug_del_sc(struct o2net_sock_container *sc);
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#else
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static inline int o2net_debugfs_init(void)
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{
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return 0;
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}
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static inline void o2net_debugfs_exit(void)
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{
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}
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static inline void o2net_debug_add_nst(struct o2net_send_tracking *nst)
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{
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}
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static inline void o2net_debug_del_nst(struct o2net_send_tracking *nst)
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{
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}
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static inline void o2net_debug_add_sc(struct o2net_sock_container *sc)
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{
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}
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static inline void o2net_debug_del_sc(struct o2net_sock_container *sc)
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{
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}
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#endif /* CONFIG_DEBUG_FS */
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#endif /* O2CLUSTER_TCP_H */
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