mirror of
https://github.com/matrix-construct/construct
synced 2024-11-17 15:30:52 +01:00
329 lines
7.1 KiB
C++
329 lines
7.1 KiB
C++
// Matrix Construct
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//
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// Copyright (C) Matrix Construct Developers, Authors & Contributors
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// Copyright (C) 2016-2019 Jason Volk <jason@zemos.net>
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//
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// Permission to use, copy, modify, and/or distribute this software for any
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// purpose with or without fee is hereby granted, provided that the above
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// copyright notice and this permission notice is present in all copies. The
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// full license for this software is available in the LICENSE file.
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namespace ircd::m::init::backfill
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{
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void gossip(const room::id &, const event::id &, const string_view &remote);
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void handle_room(const room::id &);
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void worker();
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extern size_t count, complete;
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extern ircd::run::changed handle_quit;
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extern std::unique_ptr<context> worker_context;
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extern ctx::pool *worker_pool;
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extern conf::item<seconds> delay;
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extern conf::item<seconds> gossip_timeout;
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extern conf::item<bool> gossip_enable;
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extern conf::item<bool> local_joined_only;
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extern conf::item<size_t> pool_size;
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extern conf::item<bool> enable;
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extern log::log log;
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};
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decltype(ircd::m::init::backfill::log)
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ircd::m::init::backfill::log
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{
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"m.init.backfill"
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};
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decltype(ircd::m::init::backfill::enable)
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ircd::m::init::backfill::enable
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{
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{ "name", "ircd.m.init.backfill.enable" },
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{ "default", true },
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};
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decltype(ircd::m::init::backfill::pool_size)
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ircd::m::init::backfill::pool_size
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{
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{ "name", "ircd.m.init.backfill.pool_size" },
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{ "default", 12L },
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};
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decltype(ircd::m::init::backfill::local_joined_only)
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ircd::m::init::backfill::local_joined_only
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{
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{ "name", "ircd.m.init.backfill.local_joined_only" },
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{ "default", true },
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};
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decltype(ircd::m::init::backfill::gossip_enable)
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ircd::m::init::backfill::gossip_enable
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{
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{ "name", "ircd.m.init.backfill.gossip.enable" },
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{ "default", true },
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};
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decltype(ircd::m::init::backfill::gossip_timeout)
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ircd::m::init::backfill::gossip_timeout
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{
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{ "name", "ircd.m.init.backfill.gossip.timeout" },
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{ "default", 5L },
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};
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decltype(ircd::m::init::backfill::delay)
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ircd::m::init::backfill::delay
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{
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{ "name", "ircd.m.init.backfill.delay" },
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{ "default", 15L },
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};
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decltype(ircd::m::init::backfill::count)
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ircd::m::init::backfill::count;
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decltype(ircd::m::init::backfill::complete)
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ircd::m::init::backfill::complete;
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decltype(ircd::m::init::backfill::worker_pool)
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ircd::m::init::backfill::worker_pool;
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decltype(ircd::m::init::backfill::worker_context)
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ircd::m::init::backfill::worker_context;
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decltype(ircd::m::init::backfill::handle_quit)
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ircd::m::init::backfill::handle_quit
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{
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run::level::QUIT, []
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{
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if(worker_context)
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worker_context->terminate();
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if(worker_pool)
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worker_pool->terminate();
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}
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};
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void
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ircd::m::init::backfill::init()
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{
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if(!enable)
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{
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log::warning
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{
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log, "Initial synchronization of rooms from remote servers has"
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" been disabled by the configuration. Not fetching latest events."
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};
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return;
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}
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if(ircd::read_only || ircd::write_avoid)
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{
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log::warning
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{
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log, "Not performing initial backfill because write-avoid flag is set."
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};
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return;
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}
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assert(!worker_context);
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worker_context.reset(new context
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{
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"m.init.backfill",
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512_KiB,
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&worker,
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context::POST
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});
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}
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void
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ircd::m::init::backfill::fini()
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noexcept
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{
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if(!worker_context)
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return;
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log::debug
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{
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log, "Terminating worker context..."
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};
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if(worker_pool)
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worker_pool->terminate();
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worker_context.reset(nullptr);
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}
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void
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ircd::m::init::backfill::worker()
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try
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{
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// Wait for runlevel RUN before proceeding...
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run::barrier<ctx::interrupted>{};
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// Set a low priority for this context; see related pool_opts
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ionice(ctx::cur(), 4);
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nice(ctx::cur(), 4);
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// Prepare to iterate all of the rooms this server is aware of which
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// contain at least one member from another server in any state, and
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// one member from our server in a joined state.
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rooms::opts opts;
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opts.remote_only = true;
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opts.local_joined_only = local_joined_only;
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// This is only an estimate because the rooms on the server can change
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// before this task completes.
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const auto estimate
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{
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1UL //rooms::count(opts)
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};
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if(!estimate)
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return;
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// Wait a delay before starting.
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ctx::sleep(seconds(delay));
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log::notice
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{
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log, "Starting initial backfill of rooms from other servers...",
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estimate,
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};
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// Prepare a pool of child contexts to process rooms concurrently.
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// The context pool lives directly in this frame.
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static const ctx::pool::opts pool_opts
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{
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512_KiB, // stack sz
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size_t(pool_size), // pool sz
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-1, // queue max hard
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0, // queue max soft
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true, // queue max blocking
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true, // queue max warning
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3, // ionice
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3, // nice
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};
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ctx::pool pool
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{
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"m.init.backfill", pool_opts
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};
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const scope_restore backfill_worker_pool
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{
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backfill::worker_pool, std::addressof(pool)
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};
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// Iterate the room_id's, submitting a copy of each to the next pool
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// worker; the submission blocks when all pool workers are busy, as per
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// the pool::opts.
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ctx::dock dock;
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const ctx::uninterruptible ui;
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rooms::for_each(opts, [&pool, &estimate, &dock]
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(const room::id &room_id)
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{
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if(unlikely(ctx::interruption_requested()))
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return false;
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++count;
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pool([&, room_id(std::string(room_id))] // asynchronous
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{
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const unwind completed{[&dock]
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{
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++complete;
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dock.notify_one();
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}};
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handle_room(room_id);
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log::info
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{
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log, "Initial backfill of %s complete:%zu", //estimate:%zu %02.2lf%%",
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string_view{room_id},
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complete,
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estimate,
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(complete / double(estimate)) * 100.0,
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};
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});
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return true;
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});
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if(complete < count)
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log::dwarning
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{
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log, "Waiting for initial resynchronization count:%zu complete:%zu rooms...",
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count,
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complete,
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};
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// All rooms have been submitted to the pool but the pool workers might
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// still be busy. If we unwind now the pool's dtor will kill the workers
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// so we synchronize their completion here.
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dock.wait([]
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{
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return complete >= count;
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});
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if(count)
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log::notice
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{
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log, "Initial resynchronization of %zu rooms completed.",
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count,
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};
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}
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catch(const ctx::interrupted &e)
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{
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if(count)
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log::derror
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{
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log, "Worker interrupted without completing resynchronization of all rooms."
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};
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throw;
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}
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catch(const ctx::terminated &e)
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{
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if(count)
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log::error
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{
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log, "Worker terminated without completing resynchronization of all rooms."
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};
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throw;
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}
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catch(const std::exception &e)
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{
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log::critical
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{
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log, "Worker fatal :%s",
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e.what(),
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};
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}
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void
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ircd::m::init::backfill::handle_room(const room::id &room_id)
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{
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m::acquire::opts opts;
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opts.head = true;
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opts.missing = true;
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opts.head_reset = true;
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m::acquire::acquire
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{
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room_id, opts
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};
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}
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void
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ircd::m::init::backfill::gossip(const room::id &room_id,
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const event::id &event_id,
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const string_view &remote)
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{
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m::gossip::opts opts;
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opts.timeout = seconds(gossip_timeout);
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opts.remote = remote;
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opts.event_id = event_id;
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gossip::gossip
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{
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room_id, opts
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};
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}
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