1 /* SPDX-License-Identifier: GPL-2.0-or-later */
3 * Copyright (C) 2005 Oracle. All rights reserved.
6 #ifndef O2CLUSTER_TCP_INTERNAL_H
7 #define O2CLUSTER_TCP_INTERNAL_H
9 #define O2NET_MSG_MAGIC ((u16)0xfa55)
10 #define O2NET_MSG_STATUS_MAGIC ((u16)0xfa56)
11 #define O2NET_MSG_KEEP_REQ_MAGIC ((u16)0xfa57)
12 #define O2NET_MSG_KEEP_RESP_MAGIC ((u16)0xfa58)
14 /* we're delaying our quorum decision so that heartbeat will have timed
15 * out truly dead nodes by the time we come around to making decisions
17 #define O2NET_QUORUM_DELAY_MS ((o2hb_dead_threshold + 2) * O2HB_REGION_TIMEOUT_MS)
20 * This version number represents quite a lot, unfortunately. It not
21 * only represents the raw network message protocol on the wire but also
22 * locking semantics of the file system using the protocol. It should
23 * be somewhere else, I'm sure, but right now it isn't.
25 * With version 11, we separate out the filesystem locking portion. The
26 * filesystem now has a major.minor version it negotiates. Version 11
27 * introduces this negotiation to the o2dlm protocol, and as such the
28 * version here in tcp_internal.h should not need to be bumped for
29 * filesystem locking changes.
32 * - Negotiation of filesystem locking in the dlm join.
35 * - Meta/data locks combined
41 * - Replace delete inode votes with a cluster lock
44 * - DLM join domain includes the live nodemap
47 * - DLM lockres remote refcount fixes.
50 * - Network timeout checking protocol
53 * - Remove i_generation from lock names for better stat performance.
56 * - Replace dentry votes with a cluster lock
59 * - full 64 bit i_size in the metadata lock lvbs
60 * - introduction of "rw" lock and pushing meta/data locking down
62 #define O2NET_PROTOCOL_VERSION 11ULL
63 struct o2net_handshake {
64 __be64 protocol_version;
66 __be32 o2hb_heartbeat_timeout_ms;
67 __be32 o2net_idle_timeout_ms;
68 __be32 o2net_keepalive_delay_ms;
69 __be32 o2net_reconnect_delay_ms;
73 /* this is never called from int/bh */
76 /* set the moment an sc is allocated and a connect is started */
77 struct o2net_sock_container *nn_sc;
78 /* _valid is only set after the handshake passes and tx can happen */
79 unsigned nn_sc_valid:1;
80 /* if this is set tx just returns it */
81 int nn_persistent_error;
82 /* It is only set to 1 after the idle time out. */
85 /* threads waiting for an sc to arrive wait on the wq for generation
86 * to increase. it is increased when a connecting socket succeeds
87 * or fails or when an accepted socket is attached. */
88 wait_queue_head_t nn_sc_wq;
90 struct idr nn_status_idr;
91 struct list_head nn_status_list;
93 /* connects are attempted from when heartbeat comes up until either hb
94 * goes down, the node is unconfigured, or a connect succeeds.
95 * connect_work is queued from set_nn_state both from hb up and from
96 * itself if a connect attempt fails and so can be self-arming.
97 * shutdown is careful to first mark the nn such that no connects will
98 * be attempted before canceling delayed connect work and flushing the
100 struct delayed_work nn_connect_work;
101 unsigned long nn_last_connect_attempt;
103 /* this is queued as nodes come up and is canceled when a connection is
104 * established. this expiring gives up on the node and errors out
106 struct delayed_work nn_connect_expired;
108 /* after we give up on a socket we wait a while before deciding
109 * that it is still heartbeating and that we should do some
111 struct delayed_work nn_still_up;
114 struct o2net_sock_container {
116 /* the next two are valid for the life time of the sc */
117 struct socket *sc_sock;
118 struct o2nm_node *sc_node;
120 /* all of these sc work structs hold refs on the sc while they are
121 * queued. they should not be able to ref a freed sc. the teardown
122 * race is with o2net_wq destruction in o2net_stop_listening() */
124 /* rx and connect work are generated from socket callbacks. sc
125 * shutdown removes the callbacks and then flushes the work queue */
126 struct work_struct sc_rx_work;
127 struct work_struct sc_connect_work;
128 /* shutdown work is triggered in two ways. the simple way is
129 * for a code path calls ensure_shutdown which gets a lock, removes
130 * the sc from the nn, and queues the work. in this case the
131 * work is single-shot. the work is also queued from a sock
132 * callback, though, and in this case the work will find the sc
133 * still on the nn and will call ensure_shutdown itself.. this
134 * ends up triggering the shutdown work again, though nothing
135 * will be done in that second iteration. so work queue teardown
136 * has to be careful to remove the sc from the nn before waiting
137 * on the work queue so that the shutdown work doesn't remove the
138 * sc and rearm itself.
140 struct work_struct sc_shutdown_work;
142 struct timer_list sc_idle_timeout;
143 struct delayed_work sc_keepalive_work;
145 unsigned sc_handshake_ok:1;
147 struct page *sc_page;
150 /* original handlers for the sockets */
151 void (*sc_state_change)(struct sock *sk);
152 void (*sc_data_ready)(struct sock *sk);
157 #ifdef CONFIG_DEBUG_FS
158 struct list_head sc_net_debug_item;
160 ktime_t sc_tv_data_ready;
161 ktime_t sc_tv_advance_start;
162 ktime_t sc_tv_advance_stop;
163 ktime_t sc_tv_func_start;
164 ktime_t sc_tv_func_stop;
166 #ifdef CONFIG_OCFS2_FS_STATS
167 ktime_t sc_tv_acquiry_total;
168 ktime_t sc_tv_send_total;
169 ktime_t sc_tv_status_total;
172 ktime_t sc_tv_process_total;
174 struct mutex sc_send_lock;
177 struct o2net_msg_handler {
178 struct rb_node nh_node;
182 o2net_msg_handler_func *nh_func;
184 o2net_post_msg_handler_func
187 struct list_head nh_unregister_item;
190 enum o2net_system_error {
198 struct o2net_status_wait {
199 enum o2net_system_error ns_sys_status;
202 wait_queue_head_t ns_wq;
203 struct list_head ns_node_item;
206 #ifdef CONFIG_DEBUG_FS
207 /* just for state dumps */
208 struct o2net_send_tracking {
209 struct list_head st_net_debug_item;
210 struct task_struct *st_task;
211 struct o2net_sock_container *st_sc;
216 ktime_t st_sock_time;
217 ktime_t st_send_time;
218 ktime_t st_status_time;
221 struct o2net_send_tracking {
224 #endif /* CONFIG_DEBUG_FS */
226 #endif /* O2CLUSTER_TCP_INTERNAL_H */