mirror of
https://github.com/matrix-construct/construct
synced 2024-09-06 16:55:22 +02:00
1560 lines
32 KiB
C++
1560 lines
32 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) 2016-2018 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::vm
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{
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template<class... args> static bool output(const vm::opts &, const vm::fault &, const string_view &event_id, const string_view &fmt, args&&...);
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template<class... args> static fault handle_fault(const opts &, const fault &, const string_view &event_id, const string_view &fmt, args&&...);
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template<class T> static void call_hook(hook::site<T> &, eval &, const event &, T&& data);
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static void retire(eval &, const event &);
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static void emption_check(eval &, const event &);
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static size_t calc_txn_reserve(const opts &, const event &);
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static void write_commit(eval &);
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static void write_append(eval &, const event &, const bool &);
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static fault execute_edu(eval &, const event &);
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static fault execute_pdu(eval &, const event &);
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static fault execute_du(eval &, const event &);
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static fault execute(eval &, const event &);
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static fault inject3(eval &, json::iov &, const json::iov &);
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static fault inject1(eval &, json::iov &, const json::iov &);
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static void fini();
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static void init();
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extern hook::site<eval &> issue_hook; ///< Called when this server is issuing event
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extern hook::site<eval &> conform_hook; ///< Called for static evaluations of event
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extern hook::site<eval &> access_hook; ///< Called for access control checking
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extern hook::site<eval &> fetch_auth_hook; ///< Called to resolve dependencies
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extern hook::site<eval &> fetch_prev_hook; ///< Called to resolve dependencies
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extern hook::site<eval &> fetch_state_hook; ///< Called to resolve dependencies
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extern hook::site<eval &> eval_hook; ///< Called for final event evaluation
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extern hook::site<eval &> post_hook; ///< Called to apply effects pre-notify
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extern hook::site<eval &> notify_hook; ///< Called to broadcast successful eval
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extern hook::site<eval &> effect_hook; ///< Called to apply effects post-notify
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extern conf::item<bool> log_commit_debug;
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extern conf::item<bool> log_accept_debug;
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extern conf::item<bool> log_accept_info;
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}
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decltype(ircd::m::vm::log_commit_debug)
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ircd::m::vm::log_commit_debug
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{
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{ "name", "ircd.m.vm.log.commit.debug" },
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{ "default", true },
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};
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decltype(ircd::m::vm::log_accept_debug)
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ircd::m::vm::log_accept_debug
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{
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{ "name", "ircd.m.vm.log.accept.debug" },
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{ "default", true },
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};
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decltype(ircd::m::vm::log_accept_info)
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ircd::m::vm::log_accept_info
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{
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{ "name", "ircd.m.vm.log.accept.info" },
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{ "default", false },
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};
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decltype(ircd::m::vm::issue_hook)
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ircd::m::vm::issue_hook
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{
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{ "name", "vm.issue" }
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};
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decltype(ircd::m::vm::conform_hook)
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ircd::m::vm::conform_hook
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{
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{ "name", "vm.conform" }
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};
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decltype(ircd::m::vm::access_hook)
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ircd::m::vm::access_hook
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{
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{ "name", "vm.access" }
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};
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decltype(ircd::m::vm::fetch_auth_hook)
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ircd::m::vm::fetch_auth_hook
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{
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{ "name", "vm.fetch.auth" }
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};
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decltype(ircd::m::vm::fetch_prev_hook)
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ircd::m::vm::fetch_prev_hook
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{
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{ "name", "vm.fetch.prev" }
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};
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decltype(ircd::m::vm::fetch_state_hook)
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ircd::m::vm::fetch_state_hook
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{
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{ "name", "vm.fetch.state" }
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};
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decltype(ircd::m::vm::eval_hook)
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ircd::m::vm::eval_hook
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{
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{ "name", "vm.eval" }
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};
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decltype(ircd::m::vm::post_hook)
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ircd::m::vm::post_hook
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{
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{ "name", "vm.post" }
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};
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decltype(ircd::m::vm::notify_hook)
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ircd::m::vm::notify_hook
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{
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{ "name", "vm.notify" },
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{ "exceptions", false },
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{ "interrupts", false },
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};
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decltype(ircd::m::vm::effect_hook)
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ircd::m::vm::effect_hook
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{
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{ "name", "vm.effect" },
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{ "exceptions", false },
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{ "interrupts", false },
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};
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//
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// execute
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//
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ircd::m::vm::fault
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ircd::m::vm::execute(eval &eval,
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const json::array &pdus)
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{
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assert(eval.opts);
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const auto &opts
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{
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*eval.opts
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};
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auto it(begin(pdus));
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const bool empty
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{
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it == end(pdus)
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};
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if(unlikely(empty))
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return fault::ACCEPT;
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// Determine iff pdus.size()==1 without iterating the whole array
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const bool single
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{
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std::next(begin(pdus)) == end(pdus)
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};
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if(likely(single))
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{
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const m::event event
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{
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json::object(*it)
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};
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return execute(eval, vector_view(&event, 1));
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}
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fault ret{fault::ACCEPT};
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std::vector<m::event> eventv(64); do
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{
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size_t i(0);
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for(; i < eventv.size() && it != end(pdus); ++i, ++it)
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eventv[i] = json::object(*it);
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if(likely(!opts.ordered))
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std::sort(begin(eventv), begin(eventv) + i);
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assert(i <= eventv.size());
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execute(eval, vector_view(eventv.data(), i)); //XXX
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}
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while(it != end(pdus) && eval.evaluated < opts.limit);
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return ret;
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}
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ircd::m::vm::fault
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ircd::m::vm::execute(eval &eval,
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const vector_view<const event> &events)
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{
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assert(eval.opts);
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const auto &opts
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{
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*eval.opts
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};
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const scope_restore eval_pdus
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{
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eval.pdus, events
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};
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const scope_count executing
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{
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eval::executing
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};
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const scope_restore eval_phase
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{
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eval.phase, phase::EXECUTE
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};
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const bool prefetch_keys
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{
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opts.phase[phase::VERIFY]
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&& opts.mfetch_keys
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&& events.size() > 1
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};
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const size_t prefetched_keys
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{
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prefetch_keys?
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fetch_keys(eval): 0UL
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};
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const bool prefetch_refs
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{
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opts.phase[phase::PREINDEX]
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&& opts.mprefetch_refs
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&& events.size() > 1
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};
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const size_t prefetched_refs
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{
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prefetch_refs?
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vm::prefetch_refs(eval): 0UL
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};
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size_t accepted(0), existed(0), i, j, k;
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for(i = 0; i < events.size(); i += j)
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{
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id::event ids[64];
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for(j = 0; j < 64 && i + j < events.size() && eval.evaluated + j < opts.limit; ++j)
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ids[j] = events[i + j].event_id;
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// Bitset indicating which events already exist.
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const uint64_t existing
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{
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!opts.replays?
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m::exists(vector_view<const id::event>(ids, j)):
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0UL
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};
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for(k = 0; k < j; ++k, ++eval.evaluated) try
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{
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const bool exists
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(
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existing & (1 << k)
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);
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const auto &event
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{
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events[i + k]
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};
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const auto fault
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{
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!exists?
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execute(eval, event):
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fault::EXISTS
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};
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existed += exists;
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accepted += fault == fault::ACCEPT;
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eval.accepted += fault == fault::ACCEPT;
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eval.faulted += fault != fault::ACCEPT;
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// If handle_fault() was not previously called about this eval
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if(likely(fault == fault::ACCEPT || exists))
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handle_fault(opts, fault, event.event_id?: eval.event_id, string_view{});
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}
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catch(const ctx::interrupted &)
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{
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++eval.faulted;
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throw;
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}
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catch(const std::exception &)
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{
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++eval.faulted;
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continue;
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}
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catch(...)
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{
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++eval.faulted;
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throw;
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}
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}
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return fault::ACCEPT;
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}
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ircd::m::vm::fault
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ircd::m::vm::execute(eval &eval,
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const event &event)
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try
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{
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// This assertion is tripped if the end of your context's stack is
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// danger close; try increasing your stack size.
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const ctx::stack_usage_assertion sua;
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const scope_notify notify
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{
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vm::dock
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};
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assert(eval.opts);
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const auto &opts
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{
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*eval.opts
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};
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// Determine if this is an internal room creation event
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const bool is_internal_room_create
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{
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json::get<"type"_>(event) == "m.room.create"
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&& json::get<"sender"_>(event)
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&& m::myself(json::get<"sender"_>(event))
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};
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// Query for whether the room apropos is an internal room. Note that the
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// room_id at this point may not be canonical; however, internal rooms
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// do not and never will never use non-canonical room_id's.
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const scope_restore room_internal
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{
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eval.room_internal,
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// Retain any existing true value from predetermination.
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eval.room_internal?
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eval.room_internal:
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// Case for creating an internal room (as a query will fail)
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is_internal_room_create?
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true:
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// Query to find out if internal room.
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json::get<"room_id"_>(event) && my(room::id(json::get<"room_id"_>(event)))?
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m::internal(json::get<"room_id"_>(event)):
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// Default to false
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false
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};
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// Reset the conformity report before and after this event's eval.
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const scope_restore eval_report
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{
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eval.report, event::conforms{}
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};
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// Conformity checks only require the event data itself; note that some
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// local queries may still be made by the hook, such as m::redacted().
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if(likely(opts.phase[phase::CONFORM]) && !opts.edu)
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{
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const scope_restore eval_phase
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{
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eval.phase, phase::CONFORM
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};
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call_hook(conform_hook, eval, event, eval);
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}
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// If the event is simply missing content while not being authoritatively
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// redacted, the conformity phase would have thrown a prior exception. Now
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// we know if the event is legitimately missing content.
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const bool redacted
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{
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eval.report.has(event::conforms::MISMATCH_HASHES)
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};
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// If the input JSON is insufficient we'll need a buffer to rewrite the
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// event. This buffer can be reused by subsequent events in the eval.
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assert(!eval.buf || size(eval.buf) >= event::MAX_SIZE);
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if(!opts.edu && !eval.buf && (!opts.json_source || redacted))
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eval.buf = unique_mutable_buffer
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{
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event::MAX_SIZE, simd::alignment
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};
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// Conjure a view of the correct canonical JSON representation. This will
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// either reference the input directly or the rewrite into eval.buf.
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const json::object event_source
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{
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// Canonize from some other serialized source.
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likely(!opts.edu && !opts.json_source && event.source && !redacted)?
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json::stringify(mutable_buffer{eval.buf}, event.source):
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// Canonize from no source; usually taken when my(event).
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// XXX elision conditions go here
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likely(!opts.edu && !opts.json_source && !redacted)?
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json::stringify(mutable_buffer{eval.buf}, event):
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// Canonize and redact from some other serialized source.
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!opts.edu && !opts.json_source && event.source?
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json::stringify(mutable_buffer{eval.buf}, m::essential(event.source, event::buf[0], true)):
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// Canonize and redact from no source.
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!opts.edu && !opts.json_source?
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json::stringify(mutable_buffer{eval.buf}, m::essential(event, event::buf[0], true)):
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// Use the input directly.
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string_view{event.source}
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};
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// Create a new event tuple from the canonical source, otherwise reference
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// the existing input tuple directly. From now on we'll be referencing
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// `_event` instead of `event` to ensure we have canonical values.
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const m::event &_event
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{
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event_source?
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m::event{event_source}:
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event
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};
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// Now conjure the corrected room_id and reference that for the duration
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// of this event's eval.
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const scope_restore eval_room_id
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{
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eval.room_id,
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// Reassigns reference after any prior rewrites
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likely(json::get<"room_id"_>(_event))?
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string_view(json::get<"room_id"_>(_event)):
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// No action
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eval.room_id,
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};
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// Procure the room version.
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char room_version_buf[room::VERSION_MAX_SIZE];
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const scope_restore eval_room_version
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{
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eval.room_version,
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// The room version was supplied by the user in the options structure
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// because they know better.
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eval.opts->room_version?
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eval.opts->room_version:
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// The room version was already computed; probably by vm::inject().
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eval.room_version?
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eval.room_version:
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// There's no room version because there's no room!
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!eval.room_id?
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string_view{}:
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// Special case for create event
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json::get<"type"_>(event) == "m.room.create"?
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json::string(json::get<"content"_>(_event).get("room_version", "1"_sv)):
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// Special case for v1 distinguishable event_id's
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_event.event_id && _event.event_id.version() == "1"_sv?
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"1"_sv:
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// Make a query for the room version into the stack buffer.
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m::version(room_version_buf, room{eval.room_id}, std::nothrow)
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};
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// Copy the event_id into the eval buffer
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eval.event_id =
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{
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!opts.edu && !_event.event_id && eval.room_version == "3"?
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event::id::buf{event::id::v3{eval.event_id, _event}}:
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!opts.edu && !_event.event_id?
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event::id::buf{event::id::v4{eval.event_id, _event}}:
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!opts.edu?
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event::id::buf{_event.event_id}:
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event::id::buf{}
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};
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// Enter the phase to check and hold for other evals with the same event_id
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// to prevent race-conditions. Note that duplicates are blocked but never
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// rejected here, as the first eval might fail and the second might not.
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if(likely(opts.phase[phase::DUPWAIT]) && eval.event_id)
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{
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const scope_restore eval_phase
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{
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eval.phase, phase::DUPWAIT
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};
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// Prevent more than one event with the same event_id from
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// being evaluated at the same time.
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if(likely(opts.unique))
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vm::dock.wait([&eval]
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{
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assert(eval::count(eval.event_id) <= 1);
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return eval::count(eval.event_id) == 0;
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});
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}
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// Point to the new event_id.
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const scope_restore event_event_id
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{
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mutable_cast(_event).event_id,
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event::id{eval.event_id}
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};
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// Set a member pointer to the event currently being evaluated. This
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// allows other parallel evals to have deep access to this eval. It also
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// will be used to count this event as currently being evaluated.
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assert(!eval.event_);
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const scope_restore eval_event
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{
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eval.event_, &_event
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};
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// Now that the final input is constructed and everything is known about it,
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// the next frame's exception handlers will build and propagate much better
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// error messages.
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return execute_du(eval, _event);
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}
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catch(const vm::error &e)
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{
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throw; // propagate from execute_du
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}
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catch(const m::error &e)
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{
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const ctx::exception_handler eh;
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const json::object &content
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{
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e.content
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};
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assert(eval.opts);
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return handle_fault
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(
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*eval.opts, fault::GENERAL, event.event_id,
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"eval %s %s :%s :%s :%s",
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event.event_id?
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string_view{event.event_id}:
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"<unknown>"_sv,
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json::get<"room_id"_>(event)?
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string_view{json::get<"room_id"_>(event)}:
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"<unknown>"_sv,
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e.what(),
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json::string{content["errcode"]},
|
|
json::string{content["error"]}
|
|
);
|
|
}
|
|
catch(const ctx::interrupted &)
|
|
{
|
|
throw;
|
|
}
|
|
catch(const std::exception &e)
|
|
{
|
|
const ctx::exception_handler eh;
|
|
|
|
assert(eval.opts);
|
|
return handle_fault
|
|
(
|
|
*eval.opts, fault::GENERAL, event.event_id,
|
|
"eval %s %s (General Protection) :%s",
|
|
event.event_id?
|
|
string_view{event.event_id}:
|
|
"<unknown>"_sv,
|
|
json::get<"room_id"_>(event)?
|
|
string_view{json::get<"room_id"_>(event)}:
|
|
"<unknown>"_sv,
|
|
e.what()
|
|
);
|
|
}
|
|
|
|
ircd::m::vm::fault
|
|
ircd::m::vm::execute_du(eval &eval,
|
|
const event &event)
|
|
try
|
|
{
|
|
assert(eval.id);
|
|
assert(eval.ctx);
|
|
assert(eval.opts);
|
|
assert(eval.opts->edu || event.event_id);
|
|
assert(eval.opts->edu || eval.event_id);
|
|
assert(eval.event_id == event.event_id);
|
|
assert(eval.event_);
|
|
const auto &opts
|
|
{
|
|
*eval.opts
|
|
};
|
|
|
|
const scope_restore eval_sequence
|
|
{
|
|
eval.sequence, 0UL
|
|
};
|
|
|
|
// The issue hook is only called when this server is injecting a newly
|
|
// created event.
|
|
if(opts.phase[phase::ISSUE] && eval.copts && eval.copts->issue)
|
|
{
|
|
const scope_restore eval_phase
|
|
{
|
|
eval.phase, phase::ISSUE
|
|
};
|
|
|
|
call_hook(issue_hook, eval, event, eval);
|
|
}
|
|
|
|
// Branch on whether the event is an EDU or a PDU
|
|
const fault ret
|
|
{
|
|
event.event_id && !opts.edu?
|
|
execute_pdu(eval, event):
|
|
execute_edu(eval, event)
|
|
};
|
|
|
|
// ret can be a fault code if the user masked the exception from being
|
|
// thrown. If there's an error code here nothing further is done.
|
|
if(ret != fault::ACCEPT)
|
|
return ret;
|
|
|
|
if(opts.debuglog_accept || bool(log_accept_debug))
|
|
log::debug
|
|
{
|
|
log, "%s", pretty_oneline(event)
|
|
};
|
|
|
|
// The event was executed; now we broadcast the good news. This will
|
|
// include notifying client `/sync` and the federation sender.
|
|
if(likely(opts.phase[phase::NOTIFY]))
|
|
{
|
|
const scope_restore eval_phase
|
|
{
|
|
eval.phase, phase::NOTIFY
|
|
};
|
|
|
|
call_hook(notify_hook, eval, event, eval);
|
|
}
|
|
|
|
// The "effects" of the event are created by listeners on the effect hook.
|
|
// These can include the creation of even more events, such as creating a
|
|
// PDU out of an EDU, etc. Unlike the post_hook in execute_pdu(), the
|
|
// notify for the event at issue here has already been made.
|
|
if(likely(opts.phase[phase::EFFECTS]))
|
|
{
|
|
const scope_restore eval_phase
|
|
{
|
|
eval.phase, phase::EFFECTS
|
|
};
|
|
|
|
call_hook(effect_hook, eval, event, eval);
|
|
}
|
|
|
|
if(opts.infolog_accept || bool(log_accept_info))
|
|
log::info
|
|
{
|
|
log, "%s", pretty_oneline(event)
|
|
};
|
|
|
|
return ret;
|
|
}
|
|
catch(const vm::error &e) // VM FAULT CODE
|
|
{
|
|
const ctx::exception_handler eh;
|
|
const json::object &content{e.content};
|
|
const json::string &error
|
|
{
|
|
content["error"]
|
|
};
|
|
|
|
assert(eval.opts);
|
|
return handle_fault
|
|
(
|
|
*eval.opts, e.code, event.event_id,
|
|
"execute %s %s :%s",
|
|
event.event_id?
|
|
string_view{event.event_id}:
|
|
"<edu>"_sv,
|
|
eval.room_id?
|
|
eval.room_id:
|
|
"<edu>"_sv,
|
|
error
|
|
);
|
|
}
|
|
catch(const m::error &e) // GENERAL MATRIX ERROR
|
|
{
|
|
const ctx::exception_handler eh;
|
|
const json::object &content{e.content};
|
|
const json::string error[]
|
|
{
|
|
content["errcode"],
|
|
content["error"]
|
|
};
|
|
|
|
assert(eval.opts);
|
|
return handle_fault
|
|
(
|
|
*eval.opts, fault::GENERAL, event.event_id,
|
|
"execute %s %s :%s :%s",
|
|
event.event_id?
|
|
string_view{event.event_id}:
|
|
"<edu>"_sv,
|
|
eval.room_id?
|
|
eval.room_id:
|
|
"<edu>"_sv,
|
|
error[0],
|
|
error[1]
|
|
);
|
|
}
|
|
catch(const ctx::interrupted &e) // INTERRUPTION
|
|
{
|
|
throw;
|
|
}
|
|
catch(const std::exception &e) // ALL OTHER ERRORS
|
|
{
|
|
const ctx::exception_handler eh;
|
|
|
|
assert(eval.opts);
|
|
return handle_fault
|
|
(
|
|
*eval.opts, fault::GENERAL, event.event_id,
|
|
"execute %s %s (General Protection) :%s",
|
|
event.event_id?
|
|
string_view{event.event_id}:
|
|
"<edu>"_sv,
|
|
eval.room_id?
|
|
eval.room_id:
|
|
"<edu>"_sv,
|
|
e.what()
|
|
);
|
|
}
|
|
|
|
ircd::m::vm::fault
|
|
ircd::m::vm::execute_edu(eval &eval,
|
|
const event &event)
|
|
{
|
|
if(likely(eval.opts->phase[phase::EVALUATE]))
|
|
{
|
|
const scope_restore eval_phase
|
|
{
|
|
eval.phase, phase::EVALUATE
|
|
};
|
|
|
|
call_hook(eval_hook, eval, event, eval);
|
|
}
|
|
|
|
if(likely(eval.opts->phase[phase::POST]))
|
|
{
|
|
const scope_restore eval_phase
|
|
{
|
|
eval.phase, phase::POST
|
|
};
|
|
|
|
call_hook(post_hook, eval, event, eval);
|
|
}
|
|
|
|
return fault::ACCEPT;
|
|
}
|
|
|
|
ircd::m::vm::fault
|
|
ircd::m::vm::execute_pdu(eval &eval,
|
|
const event &event)
|
|
{
|
|
const scope_count pending
|
|
{
|
|
sequence::pending
|
|
};
|
|
|
|
const scope_notify sequence_dock
|
|
{
|
|
sequence::dock, scope_notify::all
|
|
};
|
|
|
|
assert(eval.opts);
|
|
const auto &opts
|
|
{
|
|
*eval.opts
|
|
};
|
|
|
|
const m::event::id &event_id
|
|
{
|
|
event.event_id
|
|
};
|
|
|
|
const m::room::id &room_id
|
|
{
|
|
at<"room_id"_>(event)
|
|
};
|
|
|
|
const string_view &type
|
|
{
|
|
at<"type"_>(event)
|
|
};
|
|
|
|
const bool authenticate
|
|
{
|
|
opts.auth && !eval.room_internal
|
|
};
|
|
|
|
// There is no reason for an event from another origin to be sent to an
|
|
// internal room. This boxes internal room access as a local problem, with
|
|
// local mistakes.
|
|
if(unlikely(eval.room_internal && !my(event)))
|
|
throw error
|
|
{
|
|
fault::GENERAL, "Internal room event denied from external source."
|
|
};
|
|
|
|
// Check if an event with the same ID was already accepted.
|
|
if(likely(opts.phase[phase::DUPCHK]))
|
|
{
|
|
const scope_restore eval_phase
|
|
{
|
|
eval.phase, phase::DUPCHK
|
|
};
|
|
|
|
// Prevent the same event from being accepted twice.
|
|
if(likely(!opts.replays) && m::exists(event_id))
|
|
{
|
|
if(unlikely(~opts.nothrows & fault::EXISTS))
|
|
throw error
|
|
{
|
|
fault::EXISTS, "Event has already been evaluated."
|
|
};
|
|
|
|
return fault::EXISTS;
|
|
}
|
|
}
|
|
|
|
assert(!opts.unique || eval::count(event_id) == 1);
|
|
assert(opts.replays || !m::exists(event_id));
|
|
|
|
// Check if event's proprietor is denied by the room ACL.
|
|
if(likely(opts.phase[phase::ACCESS]))
|
|
{
|
|
const scope_restore eval_phase
|
|
{
|
|
eval.phase, phase::ACCESS
|
|
};
|
|
|
|
call_hook(access_hook, eval, event, eval);
|
|
}
|
|
|
|
// Check if this event is relevant to this server.
|
|
if(likely(opts.phase[phase::EMPTION]) && !eval.room_internal)
|
|
{
|
|
const scope_restore eval_phase
|
|
{
|
|
eval.phase, phase::EMPTION
|
|
};
|
|
|
|
emption_check(eval, event);
|
|
}
|
|
|
|
if(likely(opts.phase[phase::VERIFY]))
|
|
{
|
|
const scope_restore eval_phase
|
|
{
|
|
eval.phase, phase::VERIFY
|
|
};
|
|
|
|
if(!verify(event))
|
|
throw m::BAD_SIGNATURE
|
|
{
|
|
"Signature verification failed."
|
|
};
|
|
}
|
|
|
|
if(likely(opts.phase[phase::FETCH_AUTH] && opts.fetch))
|
|
{
|
|
const scope_restore eval_phase
|
|
{
|
|
eval.phase, phase::FETCH_AUTH
|
|
};
|
|
|
|
call_hook(fetch_auth_hook, eval, event, eval);
|
|
}
|
|
|
|
// Evaluation by auth system; throws
|
|
if(likely(opts.phase[phase::AUTH_STATIC]) && authenticate)
|
|
{
|
|
const scope_restore eval_phase
|
|
{
|
|
eval.phase, phase::AUTH_STATIC
|
|
};
|
|
|
|
const auto &[pass, fail]
|
|
{
|
|
room::auth::check_static(event)
|
|
};
|
|
|
|
if(!pass)
|
|
throw error
|
|
{
|
|
fault::AUTH, "Fails against provided auth_events :%s",
|
|
what(fail)
|
|
};
|
|
}
|
|
|
|
if(likely(opts.phase[phase::FETCH_PREV] && opts.fetch))
|
|
{
|
|
const scope_restore eval_phase
|
|
{
|
|
eval.phase, phase::FETCH_PREV
|
|
};
|
|
|
|
call_hook(fetch_prev_hook, eval, event, eval);
|
|
}
|
|
|
|
if(likely(opts.phase[phase::FETCH_STATE] && opts.fetch))
|
|
{
|
|
const scope_restore eval_phase
|
|
{
|
|
eval.phase, phase::FETCH_STATE
|
|
};
|
|
|
|
call_hook(fetch_state_hook, eval, event, eval);
|
|
}
|
|
|
|
// Obtain sequence number here.
|
|
const auto top(eval::seqmax());
|
|
eval.sequence =
|
|
{
|
|
top?
|
|
std::max(sequence::get(*top) + 1, sequence::uncommitted + 1):
|
|
sequence::uncommitted + 1
|
|
};
|
|
|
|
log::debug
|
|
{
|
|
log, "%s event sequenced",
|
|
loghead(eval)
|
|
};
|
|
|
|
assert(eval::sequnique(eval.sequence));
|
|
const auto &parent_phase
|
|
{
|
|
eval.parent?
|
|
eval.parent->phase:
|
|
phase::NONE
|
|
};
|
|
|
|
const auto &parent_post
|
|
{
|
|
parent_phase == phase::POST
|
|
&& eval.parent->event_
|
|
&& eval.parent->event_->event_id
|
|
};
|
|
|
|
// Allocate transaction; prefetch dependencies.
|
|
if(likely(opts.phase[phase::PREINDEX]) && !opts.mprefetch_refs)
|
|
{
|
|
const scope_restore eval_phase
|
|
{
|
|
eval.phase, phase::PREINDEX
|
|
};
|
|
|
|
dbs::write_opts wopts(opts.wopts);
|
|
wopts.event_idx = eval.sequence;
|
|
const size_t prefetched
|
|
{
|
|
dbs::prefetch(event, wopts)
|
|
};
|
|
}
|
|
|
|
const scope_restore eval_phase_precommit
|
|
{
|
|
eval.phase, phase::PRECOMMIT
|
|
};
|
|
|
|
// Wait until this is the lowest sequence number
|
|
sequence::dock.wait([&eval, &parent_post]
|
|
{
|
|
return false
|
|
|| parent_post
|
|
|| eval::seqnext(sequence::committed) == &eval
|
|
|| eval::seqnext(sequence::uncommitted) == &eval
|
|
;
|
|
});
|
|
|
|
if(likely(opts.phase[phase::AUTH_RELA] && authenticate))
|
|
{
|
|
const scope_restore eval_phase
|
|
{
|
|
eval.phase, phase::AUTH_RELA
|
|
};
|
|
|
|
const auto &[pass, fail]
|
|
{
|
|
room::auth::check_relative(event)
|
|
};
|
|
|
|
if(!pass)
|
|
throw error
|
|
{
|
|
fault::AUTH, "Fails relative to the state at the event :%s",
|
|
what(fail)
|
|
};
|
|
}
|
|
|
|
assert(eval.sequence != 0);
|
|
assert(eval::sequnique(sequence::get(eval)));
|
|
//assert(sequence::uncommitted <= sequence::get(eval));
|
|
//assert(sequence::committed < sequence::get(eval));
|
|
assert(sequence::retired < sequence::get(eval));
|
|
sequence::uncommitted = std::max(sequence::get(eval), sequence::uncommitted);
|
|
|
|
const scope_restore eval_phase_commit
|
|
{
|
|
eval.phase, phase::COMMIT
|
|
};
|
|
|
|
// Wait until this is the lowest sequence number
|
|
sequence::dock.wait([&eval, &parent_post]
|
|
{
|
|
return false
|
|
|| parent_post
|
|
|| eval::seqnext(sequence::committed) == &eval
|
|
;
|
|
});
|
|
|
|
// Reevaluation of auth against the present state of the room.
|
|
if(likely(opts.phase[phase::AUTH_PRES] && authenticate))
|
|
{
|
|
const scope_restore eval_phase
|
|
{
|
|
eval.phase, phase::AUTH_PRES
|
|
};
|
|
|
|
room::auth::check_present(event);
|
|
}
|
|
|
|
// Evaluation by module hooks
|
|
if(likely(opts.phase[phase::EVALUATE]))
|
|
{
|
|
const scope_restore eval_phase
|
|
{
|
|
eval.phase, phase::EVALUATE
|
|
};
|
|
|
|
call_hook(eval_hook, eval, event, eval);
|
|
}
|
|
|
|
// Allocate transaction; discover shared-sequenced evals.
|
|
if(likely(opts.phase[phase::INDEX]))
|
|
{
|
|
const scope_restore eval_phase
|
|
{
|
|
eval.phase, phase::INDEX
|
|
};
|
|
|
|
// Transaction composition.
|
|
write_append(eval, event, parent_post);
|
|
}
|
|
|
|
// Generate post-eval/pre-notify effects. This function may conduct
|
|
// an entire eval of several more events recursively before returning.
|
|
if(likely(opts.phase[phase::POST]))
|
|
{
|
|
const scope_restore eval_phase
|
|
{
|
|
eval.phase, phase::POST
|
|
};
|
|
|
|
call_hook(post_hook, eval, event, eval);
|
|
}
|
|
|
|
assert(sequence::committed < sequence::get(eval));
|
|
assert(sequence::retired < sequence::get(eval));
|
|
sequence::committed = !parent_post?
|
|
sequence::get(eval):
|
|
sequence::committed;
|
|
|
|
// Commit the transaction to database iff this eval is at the stack base.
|
|
if(likely(opts.phase[phase::WRITE] && !parent_post))
|
|
{
|
|
const scope_restore eval_phase
|
|
{
|
|
eval.phase, phase::WRITE
|
|
};
|
|
|
|
write_commit(eval);
|
|
}
|
|
|
|
// Wait for sequencing only if this is the stack base, otherwise we'll
|
|
// never return back to that stack base.
|
|
if(likely(!parent_post))
|
|
{
|
|
const scope_restore eval_phase
|
|
{
|
|
eval.phase, phase::RETIRE
|
|
};
|
|
|
|
retire(eval, event);
|
|
}
|
|
|
|
return fault::ACCEPT;
|
|
}
|
|
|
|
void
|
|
ircd::m::vm::retire(eval &eval,
|
|
const event &event)
|
|
|
|
{
|
|
sequence::dock.wait([&eval]
|
|
{
|
|
return eval::seqnext(sequence::retired) == std::addressof(eval);
|
|
});
|
|
|
|
const auto next
|
|
{
|
|
eval::seqnext(eval.sequence)
|
|
};
|
|
|
|
const auto highest
|
|
{
|
|
next?
|
|
sequence::get(*next):
|
|
sequence::get(eval)
|
|
};
|
|
|
|
const auto retire
|
|
{
|
|
std::clamp
|
|
(
|
|
sequence::get(eval),
|
|
sequence::retired + 1,
|
|
highest
|
|
)
|
|
};
|
|
|
|
log::debug
|
|
{
|
|
log, "%s %lu:%lu release %lu",
|
|
loghead(eval),
|
|
sequence::get(eval),
|
|
retire,
|
|
highest,
|
|
};
|
|
|
|
assert(sequence::get(eval) <= retire);
|
|
assert(sequence::retired < sequence::get(eval));
|
|
assert(sequence::retired < retire);
|
|
sequence::retired = retire;
|
|
}
|
|
|
|
namespace ircd::m::vm
|
|
{
|
|
[[gnu::visibility("internal")]]
|
|
extern stats::item<uint64_t>
|
|
write_commit_count,
|
|
write_commit_cycles;
|
|
}
|
|
|
|
decltype(ircd::m::vm::write_commit_cycles)
|
|
ircd::m::vm::write_commit_cycles
|
|
{
|
|
{ "name", "ircd.m.vm.write_commit.cycles" },
|
|
};
|
|
|
|
decltype(ircd::m::vm::write_commit_count)
|
|
ircd::m::vm::write_commit_count
|
|
{
|
|
{ "name", "ircd.m.vm.write_commit.count" },
|
|
};
|
|
|
|
void
|
|
ircd::m::vm::write_commit(eval &eval)
|
|
{
|
|
assert(eval.txn);
|
|
assert(eval.txn.use_count() == 1);
|
|
auto &txn
|
|
{
|
|
*eval.txn
|
|
};
|
|
|
|
const auto db_seq_before
|
|
{
|
|
#ifdef RB_DEBUG
|
|
db::sequence(*m::dbs::events)
|
|
#else
|
|
0UL
|
|
#endif
|
|
};
|
|
|
|
const uint64_t cyc_before {write_commit_cycles};
|
|
{
|
|
const prof::scope_cycles cycles
|
|
{
|
|
write_commit_cycles
|
|
};
|
|
|
|
txn();
|
|
}
|
|
|
|
++write_commit_count;
|
|
const auto db_seq_after
|
|
{
|
|
#ifdef RB_DEBUG
|
|
db::sequence(*m::dbs::events)
|
|
#else
|
|
0UL
|
|
#endif
|
|
};
|
|
|
|
log::debug
|
|
{
|
|
log, "%s wrote %lu | db seq:%lu:%lu txn:%lu cells:%zu in bytes:%zu cycles:%lu to events database",
|
|
loghead(eval),
|
|
sequence::get(eval),
|
|
db_seq_before,
|
|
db_seq_after,
|
|
uint64_t(write_commit_count),
|
|
txn.size(),
|
|
txn.bytes(),
|
|
uint64_t(write_commit_cycles) - cyc_before,
|
|
};
|
|
}
|
|
|
|
void
|
|
ircd::m::vm::write_append(eval &eval,
|
|
const event &event,
|
|
const bool &parent_post)
|
|
|
|
{
|
|
assert(eval.opts);
|
|
const auto &opts
|
|
{
|
|
*eval.opts
|
|
};
|
|
|
|
assert(eval.room_id);
|
|
const room room
|
|
{
|
|
eval.room_id
|
|
};
|
|
|
|
if(eval.txn)
|
|
eval.txn->clear();
|
|
|
|
if(!eval.txn && parent_post)
|
|
eval.txn = eval.parent->txn;
|
|
|
|
if(!eval.txn)
|
|
eval.txn = std::make_shared<db::txn>
|
|
(
|
|
*dbs::events, db::txn::opts
|
|
{
|
|
calc_txn_reserve(opts, event), // reserve_bytes
|
|
0, // max_bytes (no max)
|
|
}
|
|
);
|
|
|
|
assert(eval.txn);
|
|
auto &txn
|
|
{
|
|
*eval.txn
|
|
};
|
|
|
|
m::dbs::write_opts wopts(opts.wopts);
|
|
wopts.interpose = eval.txn.get();
|
|
wopts.event_idx = eval.sequence;
|
|
wopts.json_source = true;
|
|
|
|
// Don't update or resolve the room head with this shit.
|
|
const bool dummy_event
|
|
{
|
|
json::get<"type"_>(event) == "org.matrix.dummy_event"
|
|
};
|
|
|
|
wopts.appendix.set
|
|
(
|
|
dbs::appendix::ROOM_HEAD,
|
|
wopts.appendix[dbs::appendix::ROOM_HEAD] && !dummy_event
|
|
);
|
|
|
|
const auto state_candidate
|
|
{
|
|
opts.present
|
|
&& json::get<"state_key"_>(event)
|
|
};
|
|
|
|
const auto state_idx
|
|
{
|
|
state_candidate?
|
|
room.get(std::nothrow, at<"type"_>(event), at<"state_key"_>(event)):
|
|
0UL
|
|
};
|
|
|
|
const int64_t state_depth
|
|
{
|
|
m::get<int64_t>(std::nothrow, state_idx, "depth", 0L)
|
|
};
|
|
|
|
const auto state_present
|
|
{
|
|
!state_depth || state_depth < json::get<"depth"_>(event)
|
|
};
|
|
|
|
const bool authenticate
|
|
{
|
|
opts.auth
|
|
&& opts.phase[phase::AUTH_PRES]
|
|
&& state_present
|
|
&& !eval.room_internal
|
|
};
|
|
|
|
const auto &[pass, fail]
|
|
{
|
|
authenticate?
|
|
room::auth::check_present(event):
|
|
room::auth::passfail{true, {}}
|
|
};
|
|
|
|
if(state_present && fail)
|
|
log::dwarning
|
|
{
|
|
log, "%s fails auth for present state of %s :%s",
|
|
loghead(eval),
|
|
string_view{room.room_id},
|
|
what(fail),
|
|
};
|
|
|
|
wopts.appendix.set
|
|
(
|
|
dbs::appendix::ROOM_STATE,
|
|
wopts.appendix[dbs::appendix::ROOM_STATE] && state_present && pass
|
|
);
|
|
|
|
wopts.appendix.set
|
|
(
|
|
dbs::appendix::ROOM_JOINED,
|
|
wopts.appendix[dbs::appendix::ROOM_JOINED] && state_present && pass
|
|
);
|
|
|
|
const size_t wrote
|
|
{
|
|
dbs::write(txn, event, wopts)
|
|
};
|
|
|
|
log::debug
|
|
{
|
|
log, "%s composed transaction wrote:%zu state:%b pres:%b prev:%lu @%ld",
|
|
loghead(eval),
|
|
wrote,
|
|
state_candidate,
|
|
state_present,
|
|
state_idx,
|
|
state_depth,
|
|
};
|
|
}
|
|
|
|
size_t
|
|
ircd::m::vm::calc_txn_reserve(const opts &opts,
|
|
const event &event)
|
|
{
|
|
const size_t reserve_event
|
|
{
|
|
opts.reserve_bytes == size_t(-1)?
|
|
size_t(json::serialized(event) * 1.66):
|
|
opts.reserve_bytes
|
|
};
|
|
|
|
return reserve_event + opts.reserve_index;
|
|
}
|
|
|
|
void
|
|
ircd::m::vm::emption_check(eval &eval,
|
|
const m::event &event)
|
|
{
|
|
const bool my_target_member_event
|
|
{
|
|
json::get<"type"_>(event) == "m.room.member"
|
|
&& my(m::user(json::get<"state_key"_>(event)))
|
|
};
|
|
|
|
const bool allow
|
|
{
|
|
my(event)
|
|
|| my_target_member_event
|
|
|| m::local_joined(room::id(json::get<"room_id"_>(event)))
|
|
};
|
|
|
|
if(unlikely(!allow))
|
|
throw vm::error
|
|
{
|
|
http::UNAUTHORIZED, fault::BOUNCE,
|
|
"No users require events of type=%s%s%s in %s on this server.",
|
|
json::get<"type"_>(event),
|
|
json::get<"state_key"_>(event)?
|
|
",state_key="_sv:
|
|
string_view{},
|
|
json::get<"state_key"_>(event),
|
|
json::get<"room_id"_>(event),
|
|
};
|
|
}
|
|
|
|
template<class T>
|
|
void
|
|
ircd::m::vm::call_hook(hook::site<T> &hook,
|
|
eval &eval,
|
|
const event &event,
|
|
T&& data)
|
|
try
|
|
{
|
|
#if 0
|
|
log::debug
|
|
{
|
|
log, "%s hook:%s enter",
|
|
loghead(eval),
|
|
hook.name(),
|
|
};
|
|
#endif
|
|
|
|
// Providing a pointer to the eval.hook pointer allows the hook site to
|
|
// provide updates for observers in other contexts for which hook is
|
|
// currently entered.
|
|
auto **const cur
|
|
{
|
|
std::addressof(eval.hook)
|
|
};
|
|
|
|
hook(cur, event, std::forward<T>(data));
|
|
|
|
#if 0
|
|
log::debug
|
|
{
|
|
log, "%s hook:%s leave",
|
|
loghead(eval),
|
|
hook.name(),
|
|
};
|
|
#endif
|
|
}
|
|
catch(const m::error &e)
|
|
{
|
|
log::derror
|
|
{
|
|
log, "%s hook:%s :%s :%s",
|
|
loghead(eval),
|
|
hook.name(),
|
|
e.errcode(),
|
|
e.errstr(),
|
|
};
|
|
|
|
throw;
|
|
}
|
|
catch(const http::error &e)
|
|
{
|
|
log::derror
|
|
{
|
|
log, "%s hook:%s :%s :%s",
|
|
loghead(eval),
|
|
hook.name(),
|
|
e.what(),
|
|
e.content,
|
|
};
|
|
|
|
throw;
|
|
}
|
|
catch(const std::exception &e)
|
|
{
|
|
log::derror
|
|
{
|
|
log, "%s hook:%s :%s",
|
|
loghead(eval),
|
|
hook.name(),
|
|
e.what(),
|
|
};
|
|
|
|
throw;
|
|
}
|
|
|
|
template<class... args>
|
|
ircd::m::vm::fault
|
|
ircd::m::vm::handle_fault(const vm::opts &opts,
|
|
const vm::fault &code,
|
|
const string_view &event_id,
|
|
const string_view &fmt,
|
|
args&&... a)
|
|
{
|
|
if(code != fault::ACCEPT && fmt)
|
|
{
|
|
if(opts.errorlog & code)
|
|
log::error
|
|
{
|
|
log, fmt, std::forward<args>(a)...
|
|
};
|
|
else if(~opts.warnlog & code)
|
|
log::derror
|
|
{
|
|
log, fmt, std::forward<args>(a)...
|
|
};
|
|
|
|
if(opts.warnlog & code)
|
|
log::warning
|
|
{
|
|
log, fmt, std::forward<args>(a)...
|
|
};
|
|
}
|
|
|
|
if(likely(opts.outlog & code))
|
|
output(opts, code, event_id, fmt, std::forward<args>(a)...);
|
|
|
|
if(code != fault::ACCEPT && fmt)
|
|
if(unlikely(~opts.nothrows & code))
|
|
throw error
|
|
{
|
|
code, fmt, std::forward<args>(a)...
|
|
};
|
|
|
|
return code;
|
|
}
|
|
|
|
//NOTE: may yield on a json::stack flush
|
|
template<class... args>
|
|
bool
|
|
ircd::m::vm::output(const vm::opts &opts,
|
|
const vm::fault &code,
|
|
const string_view &event_id,
|
|
const string_view &fmt,
|
|
args&&... a)
|
|
{
|
|
if(!opts.out)
|
|
return false;
|
|
|
|
if(unlikely(!event_id))
|
|
return false;
|
|
|
|
json::stack::object object
|
|
{
|
|
*opts.out, event_id
|
|
};
|
|
|
|
if(code != fault::ACCEPT)
|
|
json::stack::member
|
|
{
|
|
object, "errcode", json::value
|
|
{
|
|
reflect(code), json::STRING
|
|
}
|
|
};
|
|
|
|
if(!fmt)
|
|
return true;
|
|
|
|
const fmt::bsprintf<1024> text
|
|
{
|
|
fmt, std::forward<args>(a)...
|
|
};
|
|
|
|
json::stack::member
|
|
{
|
|
object, "error", json::value
|
|
{
|
|
string_view{text}, json::STRING
|
|
}
|
|
};
|
|
|
|
return true;
|
|
}
|