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228 lines
6.9 KiB
228 lines
6.9 KiB
/* SPDX-License-Identifier: GPL-2.0-or-later */ |
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/* -*- 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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* Copyright (C) 2005 Oracle. All rights reserved. |
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*/ |
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#ifndef O2CLUSTER_TCP_INTERNAL_H |
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#define O2CLUSTER_TCP_INTERNAL_H |
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#define O2NET_MSG_MAGIC ((u16)0xfa55) |
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#define O2NET_MSG_STATUS_MAGIC ((u16)0xfa56) |
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#define O2NET_MSG_KEEP_REQ_MAGIC ((u16)0xfa57) |
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#define O2NET_MSG_KEEP_RESP_MAGIC ((u16)0xfa58) |
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/* we're delaying our quorum decision so that heartbeat will have timed |
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* out truly dead nodes by the time we come around to making decisions |
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* on their number */ |
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#define O2NET_QUORUM_DELAY_MS ((o2hb_dead_threshold + 2) * O2HB_REGION_TIMEOUT_MS) |
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/* |
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* This version number represents quite a lot, unfortunately. It not |
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* only represents the raw network message protocol on the wire but also |
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* locking semantics of the file system using the protocol. It should |
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* be somewhere else, I'm sure, but right now it isn't. |
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* |
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* With version 11, we separate out the filesystem locking portion. The |
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* filesystem now has a major.minor version it negotiates. Version 11 |
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* introduces this negotiation to the o2dlm protocol, and as such the |
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* version here in tcp_internal.h should not need to be bumped for |
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* filesystem locking changes. |
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* |
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* New in version 11 |
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* - Negotiation of filesystem locking in the dlm join. |
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* |
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* New in version 10: |
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* - Meta/data locks combined |
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* |
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* New in version 9: |
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* - All votes removed |
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* |
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* New in version 8: |
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* - Replace delete inode votes with a cluster lock |
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* |
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* New in version 7: |
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* - DLM join domain includes the live nodemap |
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* |
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* New in version 6: |
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* - DLM lockres remote refcount fixes. |
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* |
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* New in version 5: |
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* - Network timeout checking protocol |
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* |
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* New in version 4: |
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* - Remove i_generation from lock names for better stat performance. |
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* |
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* New in version 3: |
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* - Replace dentry votes with a cluster lock |
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* |
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* New in version 2: |
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* - full 64 bit i_size in the metadata lock lvbs |
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* - introduction of "rw" lock and pushing meta/data locking down |
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*/ |
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#define O2NET_PROTOCOL_VERSION 11ULL |
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struct o2net_handshake { |
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__be64 protocol_version; |
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__be64 connector_id; |
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__be32 o2hb_heartbeat_timeout_ms; |
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__be32 o2net_idle_timeout_ms; |
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__be32 o2net_keepalive_delay_ms; |
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__be32 o2net_reconnect_delay_ms; |
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}; |
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struct o2net_node { |
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/* this is never called from int/bh */ |
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spinlock_t nn_lock; |
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/* set the moment an sc is allocated and a connect is started */ |
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struct o2net_sock_container *nn_sc; |
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/* _valid is only set after the handshake passes and tx can happen */ |
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unsigned nn_sc_valid:1; |
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/* if this is set tx just returns it */ |
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int nn_persistent_error; |
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/* It is only set to 1 after the idle time out. */ |
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atomic_t nn_timeout; |
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/* threads waiting for an sc to arrive wait on the wq for generation |
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* to increase. it is increased when a connecting socket succeeds |
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* or fails or when an accepted socket is attached. */ |
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wait_queue_head_t nn_sc_wq; |
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struct idr nn_status_idr; |
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struct list_head nn_status_list; |
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/* connects are attempted from when heartbeat comes up until either hb |
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* goes down, the node is unconfigured, or a connect succeeds. |
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* connect_work is queued from set_nn_state both from hb up and from |
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* itself if a connect attempt fails and so can be self-arming. |
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* shutdown is careful to first mark the nn such that no connects will |
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* be attempted before canceling delayed connect work and flushing the |
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* queue. */ |
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struct delayed_work nn_connect_work; |
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unsigned long nn_last_connect_attempt; |
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/* this is queued as nodes come up and is canceled when a connection is |
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* established. this expiring gives up on the node and errors out |
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* transmits */ |
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struct delayed_work nn_connect_expired; |
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/* after we give up on a socket we wait a while before deciding |
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* that it is still heartbeating and that we should do some |
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* quorum work */ |
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struct delayed_work nn_still_up; |
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}; |
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struct o2net_sock_container { |
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struct kref sc_kref; |
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/* the next two are valid for the life time of the sc */ |
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struct socket *sc_sock; |
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struct o2nm_node *sc_node; |
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/* all of these sc work structs hold refs on the sc while they are |
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* queued. they should not be able to ref a freed sc. the teardown |
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* race is with o2net_wq destruction in o2net_stop_listening() */ |
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/* rx and connect work are generated from socket callbacks. sc |
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* shutdown removes the callbacks and then flushes the work queue */ |
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struct work_struct sc_rx_work; |
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struct work_struct sc_connect_work; |
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/* shutdown work is triggered in two ways. the simple way is |
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* for a code path calls ensure_shutdown which gets a lock, removes |
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* the sc from the nn, and queues the work. in this case the |
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* work is single-shot. the work is also queued from a sock |
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* callback, though, and in this case the work will find the sc |
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* still on the nn and will call ensure_shutdown itself.. this |
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* ends up triggering the shutdown work again, though nothing |
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* will be done in that second iteration. so work queue teardown |
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* has to be careful to remove the sc from the nn before waiting |
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* on the work queue so that the shutdown work doesn't remove the |
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* sc and rearm itself. |
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*/ |
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struct work_struct sc_shutdown_work; |
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struct timer_list sc_idle_timeout; |
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struct delayed_work sc_keepalive_work; |
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unsigned sc_handshake_ok:1; |
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struct page *sc_page; |
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size_t sc_page_off; |
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/* original handlers for the sockets */ |
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void (*sc_state_change)(struct sock *sk); |
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void (*sc_data_ready)(struct sock *sk); |
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u32 sc_msg_key; |
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u16 sc_msg_type; |
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#ifdef CONFIG_DEBUG_FS |
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struct list_head sc_net_debug_item; |
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ktime_t sc_tv_timer; |
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ktime_t sc_tv_data_ready; |
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ktime_t sc_tv_advance_start; |
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ktime_t sc_tv_advance_stop; |
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ktime_t sc_tv_func_start; |
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ktime_t sc_tv_func_stop; |
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#endif |
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#ifdef CONFIG_OCFS2_FS_STATS |
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ktime_t sc_tv_acquiry_total; |
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ktime_t sc_tv_send_total; |
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ktime_t sc_tv_status_total; |
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u32 sc_send_count; |
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u32 sc_recv_count; |
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ktime_t sc_tv_process_total; |
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#endif |
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struct mutex sc_send_lock; |
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}; |
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struct o2net_msg_handler { |
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struct rb_node nh_node; |
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u32 nh_max_len; |
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u32 nh_msg_type; |
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u32 nh_key; |
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o2net_msg_handler_func *nh_func; |
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void *nh_func_data; |
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o2net_post_msg_handler_func |
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*nh_post_func; |
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struct kref nh_kref; |
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struct list_head nh_unregister_item; |
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}; |
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enum o2net_system_error { |
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O2NET_ERR_NONE = 0, |
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O2NET_ERR_NO_HNDLR, |
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O2NET_ERR_OVERFLOW, |
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O2NET_ERR_DIED, |
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O2NET_ERR_MAX |
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}; |
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struct o2net_status_wait { |
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enum o2net_system_error ns_sys_status; |
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s32 ns_status; |
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int ns_id; |
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wait_queue_head_t ns_wq; |
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struct list_head ns_node_item; |
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}; |
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#ifdef CONFIG_DEBUG_FS |
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/* just for state dumps */ |
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struct o2net_send_tracking { |
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struct list_head st_net_debug_item; |
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struct task_struct *st_task; |
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struct o2net_sock_container *st_sc; |
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u32 st_id; |
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u32 st_msg_type; |
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u32 st_msg_key; |
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u8 st_node; |
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ktime_t st_sock_time; |
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ktime_t st_send_time; |
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ktime_t st_status_time; |
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}; |
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#else |
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struct o2net_send_tracking { |
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u32 dummy; |
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}; |
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#endif /* CONFIG_DEBUG_FS */ |
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#endif /* O2CLUSTER_TCP_INTERNAL_H */
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