828ae6afbe
Modify the OCFS2 handshake to ensure essential timeouts are configured identically on all nodes. Only allow changes when there are no connected peers Improves the logic in o2net_advance_rx() which broke now that sizeof(struct o2net_handshake) is greater than sizeof(struct o2net_msg) Included is the field for userspace-heartbeat timeout to avoid the need for further protocol changes. Uses a global spinlock to ensure the decisions to update configfs entries are made on the correct value. The region covered by the spinlock when incrementing the counter is much larger as this is the more critical case. Small cleanup contributed by Adrian Bunk <bunk@stusta.de> Signed-off-by: Andrew Beekhof <abeekhof@suse.de> Signed-off-by: Mark Fasheh <mark.fasheh@oracle.com>
117 lines
3.0 KiB
C
117 lines
3.0 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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#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 5000
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#define O2NET_IDLE_TIMEOUT_MS_DEFAULT 10000
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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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struct list_head *unreg_list);
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void o2net_unregister_handler_list(struct list_head *list);
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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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#endif /* O2CLUSTER_TCP_H */
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