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construct/matrix/dbs_event_refs.cc
Jason Volk 5a4a395fc2 Add noexcept to various lambdas (gcc-11).
2022-06-29 14:42:42 -07:00

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// The Construct
//
// Copyright (C) The Construct Developers, Authors & Contributors
// Copyright (C) 2016-2020 Jason Volk <jason@zemos.net>
//
// Permission to use, copy, modify, and/or distribute this software for any
// purpose with or without fee is hereby granted, provided that the above
// copyright notice and this permission notice is present in all copies. The
// full license for this software is available in the LICENSE file.
namespace ircd::m::dbs
{
static size_t _prefetch_event_refs_m_room_redaction(const event &, const write_opts &);
static void _index_event_refs_m_room_redaction(db::txn &, const event &, const write_opts &); //query
static size_t _prefetch_event_refs_m_receipt_m_read(const event &, const write_opts &);
static void _index_event_refs_m_receipt_m_read(db::txn &, const event &, const write_opts &); //query
static size_t _prefetch_event_refs_m_relates_m_reply(const event &, const write_opts &);
static void _index_event_refs_m_relates_m_reply(db::txn &, const event &, const write_opts &); //query
static size_t _prefetch_event_refs_m_relates(const event &, const write_opts &);
static void _index_event_refs_m_relates(db::txn &, const event &, const write_opts &); //query
static size_t _prefetch_event_refs_state(const event &, const write_opts &);
static void _index_event_refs_state(db::txn &, const event &, const write_opts &); // query
static size_t _prefetch_event_refs_auth(const event &, const write_opts &);
static void _index_event_refs_auth(db::txn &, const event &, const write_opts &); //query
static size_t _prefetch_event_refs_prev(const event &, const write_opts &);
static void _index_event_refs_prev(db::txn &, const event &, const write_opts &); //query
static bool event_refs__cmp_less(const string_view &a, const string_view &b);
}
decltype(ircd::m::dbs::event_refs)
ircd::m::dbs::event_refs;
decltype(ircd::m::dbs::desc::event_refs__comp)
ircd::m::dbs::desc::event_refs__comp
{
{ "name", "ircd.m.dbs._event_refs.comp" },
{ "default", "default" },
};
decltype(ircd::m::dbs::desc::event_refs__block__size)
ircd::m::dbs::desc::event_refs__block__size
{
{ "name", "ircd.m.dbs._event_refs.block.size" },
{ "default", 512L },
};
decltype(ircd::m::dbs::desc::event_refs__meta_block__size)
ircd::m::dbs::desc::event_refs__meta_block__size
{
{ "name", "ircd.m.dbs._event_refs.meta_block.size" },
{ "default", 512L },
};
decltype(ircd::m::dbs::desc::event_refs__cache__size)
ircd::m::dbs::desc::event_refs__cache__size
{
{
{ "name", "ircd.m.dbs._event_refs.cache.size" },
{ "default", long(32_MiB) },
}, []
{
const size_t &value{event_refs__cache__size};
db::capacity(db::cache(dbs::event_refs), value);
}
};
decltype(ircd::m::dbs::desc::event_refs__cache_comp__size)
ircd::m::dbs::desc::event_refs__cache_comp__size
{
{
{ "name", "ircd.m.dbs._event_refs.cache_comp.size" },
{ "default", long(0_MiB) },
}, []
{
const size_t &value{event_refs__cache_comp__size};
db::capacity(db::cache_compressed(dbs::event_refs), value);
}
};
const ircd::db::prefix_transform
ircd::m::dbs::desc::event_refs__pfx
{
"_event_refs",
[](const string_view &key) noexcept
{
return size(key) >= sizeof(event::idx) * 2;
},
[](const string_view &key) noexcept
{
assert(size(key) >= sizeof(event::idx));
return string_view
{
data(key), data(key) + sizeof(event::idx)
};
}
};
const ircd::db::comparator
ircd::m::dbs::desc::event_refs__cmp
{
"_event_refs",
event_refs__cmp_less,
db::cmp_string_view::equal,
};
const ircd::db::descriptor
ircd::m::dbs::desc::event_refs
{
// name
"_event_refs",
// explanation
R"(Inverse reference graph of events.
event_idx | ref, event_idx => --
The first part of the key is the event being referenced. The second part
of the key is the event which refers to the first event somewhere in its
prev_events references. The event_idx in the second part of the key also
contains a dbs::ref type in its highest order byte so we can store
different kinds of references.
The prefix transform is in effect; an event may be referenced multiple
times. We can find all the events we have which reference a target, and
why. The database must already contain both events (hence they have
event::idx numbers).
The value is currently unused/empty; we may eventually store metadata with
information about this reference (i.e. is depth adjacent? is the ref
redundant with another in the same event and should not be made? etc).
)",
// typing (key, value)
{
typeid(uint64_t), typeid(string_view)
},
// options
{},
// comparator
event_refs__cmp,
// prefix transform
event_refs__pfx,
// drop column
false,
// cache size
bool(cache_enable)? -1 : 0, //uses conf item
// cache size for compressed assets
bool(cache_comp_enable)? -1 : 0,
// bloom filter bits
0,
// expect queries hit
true,
// block size
size_t(event_refs__block__size),
// meta_block size
size_t(event_refs__meta_block__size),
// compression
string_view{event_refs__comp},
// compactor
{},
// compaction priority algorithm
"kOldestSmallestSeqFirst"s,
};
//
// indexers
//
void
ircd::m::dbs::_index_event_refs(db::txn &txn,
const event &event,
const write_opts &opts)
{
assert(opts.appendix.test(appendix::EVENT_REFS));
if(opts.event_refs.test(uint(ref::NEXT)))
_index_event_refs_prev(txn, event, opts);
if(opts.event_refs.test(uint(ref::NEXT_AUTH)))
_index_event_refs_auth(txn, event, opts);
if(opts.event_refs.test(uint(ref::NEXT_STATE)) ||
opts.event_refs.test(uint(ref::PREV_STATE)))
_index_event_refs_state(txn, event, opts);
if(opts.event_refs.test(uint(ref::M_RECEIPT__M_READ)))
_index_event_refs_m_receipt_m_read(txn, event, opts);
if(opts.event_refs.test(uint(ref::M_RELATES)))
_index_event_refs_m_relates(txn, event, opts);
if(opts.event_refs.test(uint(ref::M_RELATES)))
_index_event_refs_m_relates_m_reply(txn, event, opts);
if(opts.event_refs.test(uint(ref::M_ROOM_REDACTION)))
_index_event_refs_m_room_redaction(txn, event, opts);
}
size_t
ircd::m::dbs::_prefetch_event_refs(const event &event,
const write_opts &opts)
{
assert(opts.appendix.test(appendix::EVENT_REFS));
size_t ret(0);
if(opts.event_refs.test(uint(ref::NEXT)))
ret += _prefetch_event_refs_prev(event, opts);
if(opts.event_refs.test(uint(ref::NEXT_AUTH)))
ret += _prefetch_event_refs_auth(event, opts);
if(opts.event_refs.test(uint(ref::NEXT_STATE)) ||
opts.event_refs.test(uint(ref::PREV_STATE)))
ret += _prefetch_event_refs_state(event, opts);
if(opts.event_refs.test(uint(ref::M_RECEIPT__M_READ)))
ret += _prefetch_event_refs_m_receipt_m_read(event, opts);
if(opts.event_refs.test(uint(ref::M_RELATES)))
ret += _prefetch_event_refs_m_relates(event, opts);
if(opts.event_refs.test(uint(ref::M_RELATES)))
ret += _prefetch_event_refs_m_relates_m_reply(event, opts);
if(opts.event_refs.test(uint(ref::M_ROOM_REDACTION)))
ret += _prefetch_event_refs_m_room_redaction(event, opts);
return ret;
}
// NOTE: QUERY
void
ircd::m::dbs::_index_event_refs_prev(db::txn &txn,
const event &event,
const write_opts &opts)
{
assert(opts.appendix.test(appendix::EVENT_REFS));
assert(opts.event_refs.test(uint(ref::NEXT)));
const event::prev prev
{
event
};
event::id prev_ids[prev.MAX];
const auto &prev_id
{
prev.ids(prev_ids)
};
event::idx prev_idx[prev.MAX] {0};
const auto &found
{
find_event_idx(prev_idx, prev_id, opts)
};
for(size_t i(0); i < prev_id.size(); ++i)
{
if(opts.appendix.test(appendix::EVENT_HORIZON) && !prev_idx[i])
{
_index_event_horizon(txn, event, opts, prev_id[i]);
continue;
}
else if(!prev_idx[i])
{
log::dwarning
{
log, "No index found to ref %s PREV of %s",
string_view{prev_id[i]},
string_view{event.event_id},
};
continue;
}
assert(opts.event_idx != prev_idx[i]);
assert(prev_idx[i] != 0 && opts.event_idx != 0);
thread_local char buf[EVENT_REFS_KEY_MAX_SIZE];
const string_view &key
{
event_refs_key(buf, prev_idx[i], ref::NEXT, opts.event_idx)
};
db::txn::append
{
txn, dbs::event_refs,
{
opts.op, key
}
};
}
}
size_t
ircd::m::dbs::_prefetch_event_refs_prev(const event &event,
const write_opts &opts)
{
assert(opts.appendix.test(appendix::EVENT_REFS));
assert(opts.event_refs.test(uint(ref::NEXT)));
const event::prev prev
{
event
};
event::id prev_ids[prev.MAX];
const vector_view<const event::id> &prev_id
(
prev.ids(prev_ids)
);
return prefetch_event_idx(prev_id, opts);
}
// NOTE: QUERY
void
ircd::m::dbs::_index_event_refs_auth(db::txn &txn,
const event &event,
const write_opts &opts)
{
assert(opts.appendix.test(appendix::EVENT_REFS));
assert(opts.event_refs.test(uint(ref::NEXT_AUTH)));
if(!m::room::auth::is_power_event(event))
return;
const event::auth auth
{
event
};
event::id auth_ids[auth.MAX];
const auto &auth_id
{
auth.ids(auth_ids)
};
event::idx auth_idx[auth.MAX] {0};
const auto &found
{
find_event_idx(auth_idx, auth_id, opts)
};
for(size_t i(0); i < auth_id.size(); ++i)
{
if(unlikely(!auth_idx[i]))
{
if(opts.appendix.test(appendix::EVENT_HORIZON))
_index_event_horizon(txn, event, opts, auth_id[i]);
log::error
{
log, "No index found to ref %s AUTH of %s",
string_view{auth_id[i]},
string_view{event.event_id}
};
continue;
}
thread_local char buf[EVENT_REFS_KEY_MAX_SIZE];
assert(opts.event_idx != 0 && auth_idx[i] != 0);
assert(opts.event_idx != auth_idx[i]);
const string_view &key
{
event_refs_key(buf, auth_idx[i], ref::NEXT_AUTH, opts.event_idx)
};
db::txn::append
{
txn, dbs::event_refs,
{
opts.op, key
}
};
}
}
size_t
ircd::m::dbs::_prefetch_event_refs_auth(const event &event,
const write_opts &opts)
{
assert(opts.appendix.test(appendix::EVENT_REFS));
assert(opts.event_refs.test(uint(ref::NEXT_AUTH)));
if(!m::room::auth::is_power_event(event))
return false;
const event::auth auth
{
event
};
event::id auth_ids[auth.MAX];
const vector_view<const event::id> auth_id
(
auth.ids(auth_ids)
);
return prefetch_event_idx(auth_id, opts);
}
// NOTE: QUERY
void
ircd::m::dbs::_index_event_refs_state(db::txn &txn,
const event &event,
const write_opts &opts)
{
assert(opts.appendix.test(appendix::EVENT_REFS));
assert(opts.event_refs.test(uint(ref::NEXT_STATE)) ||
opts.event_refs.test(uint(ref::PREV_STATE)));
if(!json::get<"room_id"_>(event))
return;
if(!json::get<"state_key"_>(event))
return;
const m::room room
{
at<"room_id"_>(event) //TODO: ABA ABA ABA ABA
};
const m::room::state state
{
room
};
const event::idx &prev_state_idx
{
opts.allow_queries?
state.get(std::nothrow, at<"type"_>(event), at<"state_key"_>(event)): // query
0UL
};
// No previous state; nothing to do.
if(!prev_state_idx)
return;
// If the previous state's event_idx is greater than the event_idx of the
// event we're transacting this is almost surely a replay/rewrite. Bail
// out for now rather than corrupting the graph.
if(unlikely(prev_state_idx >= opts.event_idx))
return;
thread_local char buf[EVENT_REFS_KEY_MAX_SIZE];
assert(opts.event_idx != 0 && prev_state_idx != 0);
assert(opts.event_idx != prev_state_idx);
if(opts.event_refs.test(uint(ref::NEXT_STATE)))
{
const string_view &key
{
event_refs_key(buf, prev_state_idx, ref::NEXT_STATE, opts.event_idx)
};
db::txn::append
{
txn, dbs::event_refs,
{
opts.op, key
}
};
}
if(opts.event_refs.test(uint(ref::PREV_STATE)))
{
const string_view &key
{
event_refs_key(buf, opts.event_idx, ref::PREV_STATE, prev_state_idx)
};
db::txn::append
{
txn, dbs::event_refs,
{
opts.op, key
}
};
}
}
size_t
ircd::m::dbs::_prefetch_event_refs_state(const event &event,
const write_opts &opts)
{
assert(opts.appendix.test(appendix::EVENT_REFS));
assert(opts.event_refs.test(uint(ref::NEXT_STATE)) ||
opts.event_refs.test(uint(ref::PREV_STATE)));
assert(json::get<"type"_>(event));
assert(json::get<"room_id"_>(event));
if(!json::get<"state_key"_>(event))
return false;
const m::room room
{
json::get<"room_id"_>(event)
};
const m::room::state state
{
room
};
return state.prefetch(json::get<"type"_>(event), json::get<"state_key"_>(event));
}
// NOTE: QUERY
void
ircd::m::dbs::_index_event_refs_m_receipt_m_read(db::txn &txn,
const event &event,
const write_opts &opts)
{
assert(opts.appendix.test(appendix::EVENT_REFS));
assert(opts.event_refs.test(uint(ref::M_RECEIPT__M_READ)));
if(json::get<"type"_>(event) != "ircd.read")
return;
if(!my_host(json::get<"origin"_>(event)))
return;
//TODO: disallow local forge?
const json::string &event_id
{
json::get<"content"_>(event).get("event_id")
};
if(!valid(m::id::EVENT, event_id))
return;
const event::idx &event_idx
{
find_event_idx(event_id, opts)
};
if(opts.appendix.test(appendix::EVENT_HORIZON) && !event_idx)
{
_index_event_horizon(txn, event, opts, event_id);
return;
}
else if(!event_idx)
{
log::dwarning
{
log, "No index found to ref %s M_RECEIPT__M_READ of %s",
string_view{event_id},
string_view{event.event_id}
};
return;
}
thread_local char buf[EVENT_REFS_KEY_MAX_SIZE];
assert(opts.event_idx != 0 && event_idx != 0);
assert(opts.event_idx != event_idx);
const string_view &key
{
event_refs_key(buf, event_idx, ref::M_RECEIPT__M_READ, opts.event_idx)
};
db::txn::append
{
txn, dbs::event_refs,
{
opts.op, key
}
};
}
size_t
ircd::m::dbs::_prefetch_event_refs_m_receipt_m_read(const event &event,
const write_opts &opts)
{
assert(opts.appendix.test(appendix::EVENT_REFS));
assert(opts.event_refs.test(uint(ref::M_RECEIPT__M_READ)));
if(json::get<"type"_>(event) != "ircd.read")
return false;
if(!my_host(json::get<"origin"_>(event)))
return false;
const json::string &event_id
{
json::get<"content"_>(event).get("event_id")
};
if(unlikely(!valid(m::id::EVENT, event_id)))
return false;
return prefetch_event_idx(event_id, opts);
}
// NOTE: QUERY
void
ircd::m::dbs::_index_event_refs_m_relates(db::txn &txn,
const event &event,
const write_opts &opts)
{
assert(opts.appendix.test(appendix::EVENT_REFS));
assert(opts.event_refs.test(uint(ref::M_RELATES)));
const auto &content
{
json::get<"content"_>(event)
};
if(!content.has("m.relates_to", json::OBJECT))
return;
const json::object &m_relates_to
{
content["m.relates_to"]
};
const json::string &event_id
{
m_relates_to["event_id"]
};
if(!event_id)
return;
if(unlikely(!valid(m::id::EVENT, event_id)))
{
log::derror
{
log, "Cannot index m.relates_to in %s; '%s' is not an event_id.",
string_view{event.event_id},
string_view{event_id}
};
return;
}
const event::idx &event_idx
{
find_event_idx(event_id, opts)
};
if(opts.appendix.test(appendix::EVENT_HORIZON) && !event_idx)
{
// If we don't have the event being related to yet, place a marker in
// the event_horizon indicating need for re-evaluation later.
_index_event_horizon(txn, event, opts, event_id);
return;
}
else if(!event_idx)
{
log::derror
{
log, "Cannot index m.relates_to in %s; referenced %s not found.",
string_view{event.event_id},
string_view{event_id}
};
return;
}
thread_local char buf[EVENT_REFS_KEY_MAX_SIZE];
assert(opts.event_idx != 0 && event_idx != 0);
assert(opts.event_idx != event_idx);
const string_view &key
{
event_refs_key(buf, event_idx, ref::M_RELATES, opts.event_idx)
};
db::txn::append
{
txn, dbs::event_refs,
{
opts.op, key
}
};
}
size_t
ircd::m::dbs::_prefetch_event_refs_m_relates(const event &event,
const write_opts &opts)
{
assert(opts.appendix.test(appendix::EVENT_REFS));
assert(opts.event_refs.test(uint(ref::M_RELATES)));
const auto &content
{
json::get<"content"_>(event)
};
if(!content.has("m.relates_to", json::OBJECT))
return false;
const json::object &m_relates_to
{
content["m.relates_to"]
};
const json::string &event_id
{
m_relates_to["event_id"]
};
if(unlikely(!valid(m::id::EVENT, event_id)))
return false;
return prefetch_event_idx(event_id, opts);
}
// NOTE: QUERY
void
ircd::m::dbs::_index_event_refs_m_relates_m_reply(db::txn &txn,
const event &event,
const write_opts &opts)
{
assert(opts.appendix.test(appendix::EVENT_REFS));
assert(opts.event_refs.test(uint(ref::M_RELATES)));
if(json::get<"type"_>(event) != "m.room.message")
return;
const auto &content
{
json::get<"content"_>(event)
};
if(!content.has("m.relates_to", json::OBJECT))
return;
const json::object &m_relates_to
{
content["m.relates_to"]
};
if(!m_relates_to.has("m.in_reply_to", json::OBJECT))
return;
const json::object &m_in_reply_to
{
m_relates_to["m.in_reply_to"]
};
const json::string &event_id
{
m_in_reply_to["event_id"]
};
if(unlikely(!valid(m::id::EVENT, event_id)))
{
log::derror
{
log, "Cannot index m.in_reply_to in %s; '%s' is not an event_id.",
string_view{event.event_id},
string_view{event_id}
};
return;
}
const event::idx &event_idx
{
find_event_idx(event_id, opts)
};
if(opts.appendix.test(appendix::EVENT_HORIZON) && !event_idx)
{
_index_event_horizon(txn, event, opts, event_id);
return;
}
else if(!event_idx)
{
log::dwarning
{
log, "Cannot index m.in_reply_to in %s; referenced %s not found.",
string_view{event.event_id},
string_view{event_id}
};
return;
}
thread_local char buf[EVENT_REFS_KEY_MAX_SIZE];
assert(opts.event_idx != 0 && event_idx != 0);
assert(opts.event_idx != event_idx);
const string_view &key
{
event_refs_key(buf, event_idx, ref::M_RELATES, opts.event_idx)
};
db::txn::append
{
txn, dbs::event_refs,
{
opts.op, key
}
};
}
size_t
ircd::m::dbs::_prefetch_event_refs_m_relates_m_reply(const event &event,
const write_opts &opts)
{
assert(opts.appendix.test(appendix::EVENT_REFS));
assert(opts.event_refs.test(uint(ref::M_RELATES)));
if(json::get<"type"_>(event) != "m.room.message")
return false;
const auto &content
{
json::get<"content"_>(event)
};
if(!content.has("m.relates_to", json::OBJECT))
return false;
const json::object &m_relates_to
{
content["m.relates_to"]
};
if(!m_relates_to.has("m.in_reply_to", json::OBJECT))
return false;
const json::object &m_in_reply_to
{
m_relates_to["m.in_reply_to"]
};
const json::string &event_id
{
m_in_reply_to["event_id"]
};
if(unlikely(!valid(m::id::EVENT, event_id)))
return false;
return prefetch_event_idx(event_id, opts);
}
// NOTE: QUERY
void
ircd::m::dbs::_index_event_refs_m_room_redaction(db::txn &txn,
const event &event,
const write_opts &opts)
{
assert(opts.appendix.test(appendix::EVENT_REFS));
assert(opts.event_refs.test(uint(ref::M_ROOM_REDACTION)));
if(json::get<"type"_>(event) != "m.room.redaction")
return;
if(!valid(m::id::EVENT, json::get<"redacts"_>(event)))
return;
const auto &event_id
{
json::get<"redacts"_>(event)
};
const event::idx &event_idx
{
find_event_idx(event_id, opts)
};
if(opts.appendix.test(appendix::EVENT_HORIZON) && !event_idx)
{
_index_event_horizon(txn, event, opts, event_id);
return;
}
else if(!event_idx)
{
log::dwarning
{
log, "Cannot index m.room.redaction in %s; referenced %s not found.",
string_view{event.event_id},
string_view{event_id}
};
return;
}
thread_local char buf[EVENT_REFS_KEY_MAX_SIZE];
assert(opts.event_idx != 0 && event_idx != 0);
assert(opts.event_idx != event_idx);
const string_view &key
{
event_refs_key(buf, event_idx, ref::M_ROOM_REDACTION, opts.event_idx)
};
db::txn::append
{
txn, dbs::event_refs,
{
opts.op, key
}
};
}
size_t
ircd::m::dbs::_prefetch_event_refs_m_room_redaction(const event &event,
const write_opts &opts)
{
assert(opts.appendix.test(appendix::EVENT_REFS));
assert(opts.event_refs.test(uint(ref::M_ROOM_REDACTION)));
if(json::get<"type"_>(event) != "m.room.redaction")
return false;
const auto &event_id
{
json::get<"redacts"_>(event)
};
if(!valid(m::id::EVENT, event_id))
return false;
return prefetch_event_idx(event_id, opts);
}
//
// cmp
//
bool
ircd::m::dbs::event_refs__cmp_less(const string_view &a,
const string_view &b)
{
static const size_t half(sizeof(event::idx));
static const size_t full(half * 2);
assert(size(a) >= half);
assert(size(b) >= half);
const event::idx *const key[2]
{
reinterpret_cast<const event::idx *>(data(a)),
reinterpret_cast<const event::idx *>(data(b)),
};
return
key[0][0] < key[1][0]? true:
key[0][0] > key[1][0]? false:
size(a) < size(b)? true:
size(a) > size(b)? false:
size(a) == half? false:
key[0][1] < key[1][1]? true:
false;
}
//
// key
//
std::tuple<ircd::m::dbs::ref, ircd::m::event::idx>
ircd::m::dbs::event_refs_key(const string_view &amalgam)
{
const event::idx key
{
byte_view<event::idx>{amalgam}
};
return
{
ref(key >> ref_shift), key & ~ref_mask
};
}
ircd::string_view
ircd::m::dbs::event_refs_key(const mutable_buffer &out,
const event::idx &tgt,
const ref &type,
const event::idx &src)
{
assert((src & ref_mask) == 0);
assert(size(out) >= sizeof(event::idx) * 2);
event::idx *const &key
{
reinterpret_cast<event::idx *>(data(out))
};
key[0] = tgt;
key[1] = src;
key[1] |= uint64_t(type) << ref_shift;
return string_view
{
data(out), data(out) + sizeof(event::idx) * 2
};
}
//
// util
//
ircd::string_view
ircd::m::dbs::reflect(const ref &type)
{
switch(type)
{
case ref::NEXT: return "NEXT";
case ref::NEXT_AUTH: return "NEXT_AUTH";
case ref::NEXT_STATE: return "NEXT_STATE";
case ref::PREV_STATE: return "PREV_STATE";
case ref::M_RECEIPT__M_READ: return "M_RECEIPT__M_READ";
case ref::M_RELATES: return "M_RELATES";
case ref::M_ROOM_REDACTION: return "M_ROOM_REDACTION";
}
return "????";
}
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