| /* -*- mode: c; c-basic-offset: 8; -*- |
| * vim: noexpandtab sw=8 ts=8 sts=0: |
| * |
| * Copyright (C) 2005 Oracle. All rights reserved. |
| * |
| * This program is free software; you can redistribute it and/or |
| * modify it under the terms of the GNU General Public |
| * License as published by the Free Software Foundation; either |
| * version 2 of the License, or (at your option) any later version. |
| * |
| * This program is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| * General Public License for more details. |
| * |
| * You should have received a copy of the GNU General Public |
| * License along with this program; if not, write to the |
| * Free Software Foundation, Inc., 59 Temple Place - Suite 330, |
| * Boston, MA 021110-1307, USA. |
| */ |
| |
| #ifndef O2CLUSTER_TCP_INTERNAL_H |
| #define O2CLUSTER_TCP_INTERNAL_H |
| |
| #define O2NET_MSG_MAGIC ((u16)0xfa55) |
| #define O2NET_MSG_STATUS_MAGIC ((u16)0xfa56) |
| #define O2NET_MSG_KEEP_REQ_MAGIC ((u16)0xfa57) |
| #define O2NET_MSG_KEEP_RESP_MAGIC ((u16)0xfa58) |
| |
| /* we're delaying our quorum decision so that heartbeat will have timed |
| * out truly dead nodes by the time we come around to making decisions |
| * on their number */ |
| #define O2NET_QUORUM_DELAY_MS ((o2hb_dead_threshold + 2) * O2HB_REGION_TIMEOUT_MS) |
| |
| /* |
| * This version number represents quite a lot, unfortunately. It not |
| * only represents the raw network message protocol on the wire but also |
| * locking semantics of the file system using the protocol. It should |
| * be somewhere else, I'm sure, but right now it isn't. |
| * |
| * With version 11, we separate out the filesystem locking portion. The |
| * filesystem now has a major.minor version it negotiates. Version 11 |
| * introduces this negotiation to the o2dlm protocol, and as such the |
| * version here in tcp_internal.h should not need to be bumped for |
| * filesystem locking changes. |
| * |
| * New in version 11 |
| * - Negotiation of filesystem locking in the dlm join. |
| * |
| * New in version 10: |
| * - Meta/data locks combined |
| * |
| * New in version 9: |
| * - All votes removed |
| * |
| * New in version 8: |
| * - Replace delete inode votes with a cluster lock |
| * |
| * New in version 7: |
| * - DLM join domain includes the live nodemap |
| * |
| * New in version 6: |
| * - DLM lockres remote refcount fixes. |
| * |
| * New in version 5: |
| * - Network timeout checking protocol |
| * |
| * New in version 4: |
| * - Remove i_generation from lock names for better stat performance. |
| * |
| * New in version 3: |
| * - Replace dentry votes with a cluster lock |
| * |
| * New in version 2: |
| * - full 64 bit i_size in the metadata lock lvbs |
| * - introduction of "rw" lock and pushing meta/data locking down |
| */ |
| #define O2NET_PROTOCOL_VERSION 11ULL |
| struct o2net_handshake { |
| __be64 protocol_version; |
| __be64 connector_id; |
| __be32 o2hb_heartbeat_timeout_ms; |
| __be32 o2net_idle_timeout_ms; |
| __be32 o2net_keepalive_delay_ms; |
| __be32 o2net_reconnect_delay_ms; |
| }; |
| |
| struct o2net_node { |
| /* this is never called from int/bh */ |
| spinlock_t nn_lock; |
| |
| /* set the moment an sc is allocated and a connect is started */ |
| struct o2net_sock_container *nn_sc; |
| /* _valid is only set after the handshake passes and tx can happen */ |
| unsigned nn_sc_valid:1; |
| /* if this is set tx just returns it */ |
| int nn_persistent_error; |
| /* It is only set to 1 after the idle time out. */ |
| atomic_t nn_timeout; |
| |
| /* threads waiting for an sc to arrive wait on the wq for generation |
| * to increase. it is increased when a connecting socket succeeds |
| * or fails or when an accepted socket is attached. */ |
| wait_queue_head_t nn_sc_wq; |
| |
| struct idr nn_status_idr; |
| struct list_head nn_status_list; |
| |
| /* connects are attempted from when heartbeat comes up until either hb |
| * goes down, the node is unconfigured, no connect attempts succeed |
| * before O2NET_CONN_IDLE_DELAY, or a connect succeeds. connect_work |
| * is queued from set_nn_state both from hb up and from itself if a |
| * connect attempt fails and so can be self-arming. shutdown is |
| * careful to first mark the nn such that no connects will be attempted |
| * before canceling delayed connect work and flushing the queue. */ |
| struct delayed_work nn_connect_work; |
| unsigned long nn_last_connect_attempt; |
| |
| /* this is queued as nodes come up and is canceled when a connection is |
| * established. this expiring gives up on the node and errors out |
| * transmits */ |
| struct delayed_work nn_connect_expired; |
| |
| /* after we give up on a socket we wait a while before deciding |
| * that it is still heartbeating and that we should do some |
| * quorum work */ |
| struct delayed_work nn_still_up; |
| }; |
| |
| struct o2net_sock_container { |
| struct kref sc_kref; |
| /* the next two are valid for the life time of the sc */ |
| struct socket *sc_sock; |
| struct o2nm_node *sc_node; |
| |
| /* all of these sc work structs hold refs on the sc while they are |
| * queued. they should not be able to ref a freed sc. the teardown |
| * race is with o2net_wq destruction in o2net_stop_listening() */ |
| |
| /* rx and connect work are generated from socket callbacks. sc |
| * shutdown removes the callbacks and then flushes the work queue */ |
| struct work_struct sc_rx_work; |
| struct work_struct sc_connect_work; |
| /* shutdown work is triggered in two ways. the simple way is |
| * for a code path calls ensure_shutdown which gets a lock, removes |
| * the sc from the nn, and queues the work. in this case the |
| * work is single-shot. the work is also queued from a sock |
| * callback, though, and in this case the work will find the sc |
| * still on the nn and will call ensure_shutdown itself.. this |
| * ends up triggering the shutdown work again, though nothing |
| * will be done in that second iteration. so work queue teardown |
| * has to be careful to remove the sc from the nn before waiting |
| * on the work queue so that the shutdown work doesn't remove the |
| * sc and rearm itself. |
| */ |
| struct work_struct sc_shutdown_work; |
| |
| struct timer_list sc_idle_timeout; |
| struct delayed_work sc_keepalive_work; |
| |
| unsigned sc_handshake_ok:1; |
| |
| struct page *sc_page; |
| size_t sc_page_off; |
| |
| /* original handlers for the sockets */ |
| void (*sc_state_change)(struct sock *sk); |
| void (*sc_data_ready)(struct sock *sk, int bytes); |
| #ifdef CONFIG_DEBUG_FS |
| struct list_head sc_net_debug_item; |
| #endif |
| struct timeval sc_tv_timer; |
| struct timeval sc_tv_data_ready; |
| struct timeval sc_tv_advance_start; |
| struct timeval sc_tv_advance_stop; |
| struct timeval sc_tv_func_start; |
| struct timeval sc_tv_func_stop; |
| u32 sc_msg_key; |
| u16 sc_msg_type; |
| |
| struct mutex sc_send_lock; |
| }; |
| |
| struct o2net_msg_handler { |
| struct rb_node nh_node; |
| u32 nh_max_len; |
| u32 nh_msg_type; |
| u32 nh_key; |
| o2net_msg_handler_func *nh_func; |
| o2net_msg_handler_func *nh_func_data; |
| o2net_post_msg_handler_func |
| *nh_post_func; |
| struct kref nh_kref; |
| struct list_head nh_unregister_item; |
| }; |
| |
| enum o2net_system_error { |
| O2NET_ERR_NONE = 0, |
| O2NET_ERR_NO_HNDLR, |
| O2NET_ERR_OVERFLOW, |
| O2NET_ERR_DIED, |
| O2NET_ERR_MAX |
| }; |
| |
| struct o2net_status_wait { |
| enum o2net_system_error ns_sys_status; |
| s32 ns_status; |
| int ns_id; |
| wait_queue_head_t ns_wq; |
| struct list_head ns_node_item; |
| }; |
| |
| #ifdef CONFIG_DEBUG_FS |
| /* just for state dumps */ |
| struct o2net_send_tracking { |
| struct list_head st_net_debug_item; |
| struct task_struct *st_task; |
| struct o2net_sock_container *st_sc; |
| u32 st_id; |
| u32 st_msg_type; |
| u32 st_msg_key; |
| u8 st_node; |
| ktime_t st_sock_time; |
| ktime_t st_send_time; |
| ktime_t st_status_time; |
| }; |
| #else |
| struct o2net_send_tracking { |
| u32 dummy; |
| }; |
| #endif /* CONFIG_DEBUG_FS */ |
| |
| #endif /* O2CLUSTER_TCP_INTERNAL_H */ |