8e9801dfe3
When tcp retransmit timeout(15mins), the connection will be closed. Pending messages may be lost during this time. So we set tcp user timeout to override the retransmit timeout to the max value. This is OK for ocfs2 since we have disk heartbeat, if peer crash, the disk heartbeat will timeout and it will be evicted, if disk heartbeat not timeout and connection idle for a long time, then this means the cluster enters split-brain state, since fence can't happen, we'd better keep the connection and wait network recover. Signed-off-by: Junxiao Bi <junxiao.bi@oracle.com> Reviewed-by: Srinivas Eeda <srinivas.eeda@oracle.com> Reviewed-by: Mark Fasheh <mfasheh@suse.de> Cc: Joel Becker <jlbec@evilplan.org> Cc: Joseph Qi <joseph.qi@huawei.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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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