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Comparing deliantra/server/lib/cf.pm (file contents):
Revision 1.202 by root, Mon Jan 29 20:16:28 2007 UTC vs.
Revision 1.212 by root, Tue Feb 13 19:25:44 2007 UTC

… …
15use Coro::Timer; 15use Coro::Timer;
16use Coro::Signal; 16use Coro::Signal;
17use Coro::Semaphore; 17use Coro::Semaphore;
18use Coro::AIO; 18use Coro::AIO;
19 19
20use BDB ();
20use Data::Dumper; 21use Data::Dumper;
21use Digest::MD5; 22use Digest::MD5;
22use Fcntl; 23use Fcntl;
23use IO::AIO 2.32 (); 24use IO::AIO 2.32 ();
24use YAML::Syck (); 25use YAML::Syck ();
25use Time::HiRes; 26use Time::HiRes;
27use Compress::LZF;
28
29Compress::LZF::sfreeze_cr { }; # prime Compress::LZF so it does not use require later
26 30
27use Event; $Event::Eval = 1; # no idea why this is required, but it is 31use Event; $Event::Eval = 1; # no idea why this is required, but it is
28 32
29sub WF_AUTOCANCEL () { 1 } # automatically cancel this watcher on reload 33sub WF_AUTOCANCEL () { 1 } # automatically cancel this watcher on reload
30 34
… …
48our $TICK_WATCHER; 52our $TICK_WATCHER;
49our $AIO_POLL_WATCHER; 53our $AIO_POLL_WATCHER;
50our $WRITE_RUNTIME_WATCHER; 54our $WRITE_RUNTIME_WATCHER;
51our $NEXT_TICK; 55our $NEXT_TICK;
52our $NOW; 56our $NOW;
57our $USE_FSYNC = 1; # use fsync to write maps - default off
58
59our $BDB_POLL_WATCHER;
60our $DB_ENV;
53 61
54our %CFG; 62our %CFG;
55 63
56our $UPTIME; $UPTIME ||= time; 64our $UPTIME; $UPTIME ||= time;
57our $RUNTIME; 65our $RUNTIME;
58 66
59our %PLAYER; # all users 67our %PLAYER; # all users
60our %MAP; # all maps 68our %MAP; # all maps
61our $LINK_MAP; # the special {link} map, which is always available 69our $LINK_MAP; # the special {link} map, which is always available
62our $RANDOM_MAPS = cf::localdir . "/random"; 70our $RANDOM_MAPS = cf::localdir . "/random";
71our $BDB_ENV_DIR = cf::localdir . "/db";
63 72
64our $WAIT_FOR_TICK; $WAIT_FOR_TICK ||= new Coro::Signal; 73our $WAIT_FOR_TICK; $WAIT_FOR_TICK ||= new Coro::Signal;
65our $WAIT_FOR_TICK_ONE; $WAIT_FOR_TICK_ONE ||= new Coro::Signal; 74our $WAIT_FOR_TICK_ONE; $WAIT_FOR_TICK_ONE ||= new Coro::Signal;
66 75
67# used to convert map paths into valid unix filenames by replacing / by ∕ 76# used to convert map paths into valid unix filenames by replacing / by ∕
… …
80mkdir cf::localdir; 89mkdir cf::localdir;
81mkdir cf::localdir . "/" . cf::playerdir; 90mkdir cf::localdir . "/" . cf::playerdir;
82mkdir cf::localdir . "/" . cf::tmpdir; 91mkdir cf::localdir . "/" . cf::tmpdir;
83mkdir cf::localdir . "/" . cf::uniquedir; 92mkdir cf::localdir . "/" . cf::uniquedir;
84mkdir $RANDOM_MAPS; 93mkdir $RANDOM_MAPS;
94mkdir $BDB_ENV_DIR;
85 95
86our $EMERGENCY_POSITION; 96our $EMERGENCY_POSITION;
87 97
88sub cf::map::normalise; 98sub cf::map::normalise;
89 99
… …
358 # 60 allows for the watchdog to kill the server. 368 # 60 allows for the watchdog to kill the server.
359 369
360 (aio_write $fh, 0, (length $value), $value, 0) <= 0 370 (aio_write $fh, 0, (length $value), $value, 0) <= 0
361 and return; 371 and return;
362 372
373 # always fsync - this file is important
363 aio_fsync $fh 374 aio_fsync $fh
364 and return; 375 and return;
365 376
366 close $fh 377 close $fh
367 or return; 378 or return;
… …
752 $filename, length $$rdata, scalar @$objs; 763 $filename, length $$rdata, scalar @$objs;
753 764
754 if (my $fh = aio_open "$filename~", O_WRONLY | O_CREAT, 0600) { 765 if (my $fh = aio_open "$filename~", O_WRONLY | O_CREAT, 0600) {
755 chmod SAVE_MODE, $fh; 766 chmod SAVE_MODE, $fh;
756 aio_write $fh, 0, (length $$rdata), $$rdata, 0; 767 aio_write $fh, 0, (length $$rdata), $$rdata, 0;
757 aio_fsync $fh; 768 aio_fsync $fh if $cf::USE_FSYNC;
758 close $fh; 769 close $fh;
759 770
760 if (@$objs) { 771 if (@$objs) {
761 if (my $fh = aio_open "$filename.pst~", O_WRONLY | O_CREAT, 0600) { 772 if (my $fh = aio_open "$filename.pst~", O_WRONLY | O_CREAT, 0600) {
762 chmod SAVE_MODE, $fh; 773 chmod SAVE_MODE, $fh;
763 my $data = Storable::nfreeze { version => 1, objs => $objs }; 774 my $data = Storable::nfreeze { version => 1, objs => $objs };
764 aio_write $fh, 0, (length $data), $data, 0; 775 aio_write $fh, 0, (length $data), $data, 0;
765 aio_fsync $fh; 776 aio_fsync $fh if $cf::USE_FSYNC;
766 close $fh; 777 close $fh;
767 aio_rename "$filename.pst~", "$filename.pst"; 778 aio_rename "$filename.pst~", "$filename.pst";
768 } 779 }
769 } else { 780 } else {
770 aio_unlink "$filename.pst"; 781 aio_unlink "$filename.pst";
… …
1598 return if $self->players; 1609 return if $self->players;
1599 return if $self->isa ("ext::map_per_player");#d# 1610 return if $self->isa ("ext::map_per_player");#d#
1600 1611
1601 warn "resetting map ", $self->path;#d# 1612 warn "resetting map ", $self->path;#d#
1602 1613
1614 $self->in_memory (cf::MAP_SWAPPED);
1615
1616 # need to save uniques path
1617 unless ($self->{deny_save}) {
1618 my $uniq = $self->uniq_path; utf8::encode $uniq;
1619
1620 $self->_save_objects ($uniq, cf::IO_UNIQUES)
1621 if $uniq;
1622 }
1623
1603 delete $cf::MAP{$self->path}; 1624 delete $cf::MAP{$self->path};
1604 1625
1605 $self->in_memory (cf::MAP_SWAPPED);
1606 $self->clear; 1626 $self->clear;
1607 1627
1608 $_->clear_links_to ($self) for values %cf::MAP; 1628 $_->clear_links_to ($self) for values %cf::MAP;
1609 1629
1610 $self->unlink_save; 1630 $self->unlink_save;
… …
2174The parameter C<$family> should best start with the name of the extension 2194The parameter C<$family> should best start with the name of the extension
2175using it, it should be unique. 2195using it, it should be unique.
2176 2196
2177=over 4 2197=over 4
2178 2198
2179=item $hashref = cf::db_get $family
2180
2181Return a hashref for use by the extension C<$family>, which can be
2182modified. After modifications, you have to call C<cf::db_dirty> or
2183C<cf::db_sync>.
2184
2185=item $value = cf::db_get $family => $key 2199=item $value = cf::db_get $family => $key
2186 2200
2187Returns a single value from the database 2201Returns a single value from the database.
2188
2189=item cf::db_put $family => $hashref
2190
2191Stores the given family hashref into the database. Updates are delayed, if
2192you want the data to be synced to disk immediately, use C<cf::db_sync>.
2193 2202
2194=item cf::db_put $family => $key => $value 2203=item cf::db_put $family => $key => $value
2195 2204
2196Stores the given C<$value> in the family hash. Updates are delayed, if you 2205Stores the given C<$value> in the family.
2197want the data to be synced to disk immediately, use C<cf::db_sync>.
2198
2199=item cf::db_dirty
2200
2201Marks the database as dirty, to be updated at a later time.
2202
2203=item cf::db_sync
2204
2205Immediately write the database to disk I<if it is dirty>.
2206 2206
2207=cut 2207=cut
2208 2208
2209our $DB; 2209our $DB;
2210 2210
2211{ 2211sub db_init {
2212 unless ($DB) {
2213 $DB = BDB::db_create $DB_ENV;
2214
2215 cf::sync_job {
2216 eval {
2217 $DB->set_flags (BDB::CHKSUM);
2218
2219 BDB::db_open $DB, undef, "db", undef, BDB::BTREE,
2220 BDB::CREATE | BDB::AUTO_COMMIT, 0666;
2221 cf::cleanup "db_open(db): $!" if $!;
2222 };
2223 cf::cleanup "db_open(db): $@" if $@;
2224 };
2225
2212 my $path = cf::localdir . "/database.pst"; 2226 my $path = cf::localdir . "/database.pst";
2227 if (stat $path) {
2228 cf::sync_job {
2229 my $pst = Storable::retrieve $path;
2213 2230
2214 sub db_load() { 2231 cf::db_put (board => data => $pst->{board});
2215 $DB = stat $path ? Storable::retrieve $path : { }; 2232 cf::db_put (guildrules => data => $pst->{guildrules});
2216 } 2233 cf::db_put (rent => balance => $pst->{rent}{balance});
2234 BDB::db_env_txn_checkpoint $DB_ENV;
2217 2235
2218 my $pid; 2236 unlink $path;
2219
2220 sub db_save() {
2221 waitpid $pid, 0 if $pid;
2222 if (0 == ($pid = fork)) {
2223 $DB->{_meta}{version} = 1;
2224 Storable::nstore $DB, "$path~";
2225 rename "$path~", $path;
2226 cf::_exit 0 if defined $pid;
2227 } 2237 };
2228 }
2229
2230 my $dirty;
2231
2232 sub db_sync() {
2233 db_save if $dirty;
2234 undef $dirty;
2235 }
2236
2237 my $idle = Event->idle (
2238 reentrant => 0,
2239 min => 10,
2240 max => 20,
2241 repeat => 0,
2242 data => WF_AUTOCANCEL,
2243 cb => \&db_sync,
2244 );
2245
2246 sub db_dirty() {
2247 $dirty = 1;
2248 $idle->start;
2249 }
2250
2251 sub db_get($;$) {
2252 @_ >= 2
2253 ? $DB->{$_[0]}{$_[1]}
2254 : ($DB->{$_[0]} ||= { })
2255 }
2256
2257 sub db_put($$;$) {
2258 if (@_ >= 3) {
2259 $DB->{$_[0]}{$_[1]} = $_[2];
2260 } else {
2261 $DB->{$_[0]} = $_[1];
2262 }
2263 db_dirty;
2264 }
2265
2266 cf::global->attach (
2267 prio => 10000,
2268 on_cleanup => sub {
2269 db_sync;
2270 }, 2238 }
2271 ); 2239 }
2240}
2241
2242sub db_get($$) {
2243 my $key = "$_[0]/$_[1]";
2244
2245 cf::sync_job {
2246 BDB::db_get $DB, undef, $key, my $data;
2247
2248 $! ? ()
2249 : Compress::LZF::sthaw $data
2250 }
2251}
2252
2253sub db_put($$$) {
2254 BDB::dbreq_pri 4;
2255 BDB::db_put $DB, undef, "$_[0]/$_[1]", Compress::LZF::sfreeze_cr $_[2], 0, sub { };
2272} 2256}
2273 2257
2274############################################################################# 2258#############################################################################
2275# the server's main() 2259# the server's init and main functions
2260
2261sub load_resources {
2262 load_regions sprintf "%s/%s/regions", cf::datadir, cf::mapdir
2263 or die "unable to load regions file\n";#d#
2264}
2276 2265
2277sub cfg_load { 2266sub cfg_load {
2278 open my $fh, "<:utf8", cf::confdir . "/config" 2267 open my $fh, "<:utf8", cf::confdir . "/config"
2279 or return; 2268 or return;
2280 2269
… …
2291 $CFG{mlockall} ? eval "mlockall()" : eval "munlockall()" 2280 $CFG{mlockall} ? eval "mlockall()" : eval "munlockall()"
2292 and die "WARNING: m(un)lockall failed: $!\n"; 2281 and die "WARNING: m(un)lockall failed: $!\n";
2293 }; 2282 };
2294 warn $@ if $@; 2283 warn $@ if $@;
2295 } 2284 }
2285}
2286
2287sub init {
2288 load_resources;
2296} 2289}
2297 2290
2298sub main { 2291sub main {
2299 # we must not ever block the main coroutine 2292 # we must not ever block the main coroutine
2300 local $Coro::idle = sub { 2293 local $Coro::idle = sub {
… …
2303 Event::one_event; 2296 Event::one_event;
2304 })->prio (Coro::PRIO_MAX); 2297 })->prio (Coro::PRIO_MAX);
2305 }; 2298 };
2306 2299
2307 cfg_load; 2300 cfg_load;
2308 db_load; 2301 db_init;
2309 load_extensions; 2302 load_extensions;
2310 2303
2311 $TICK_WATCHER->start; 2304 $TICK_WATCHER->start;
2312 Event::loop; 2305 Event::loop;
2313} 2306}
… …
2352 my $map = $cf::MAP{$path} or next; 2345 my $map = $cf::MAP{$path} or next;
2353 $map->valid or next; 2346 $map->valid or next;
2354 $map->save; 2347 $map->save;
2355 } 2348 }
2356 warn "end emergency map save\n"; 2349 warn "end emergency map save\n";
2350
2351 warn "begin emergency database checkpoint\n";
2352 BDB::db_env_txn_checkpoint $DB_ENV;
2353 warn "end emergency database checkpoint\n";
2357 }; 2354 };
2358 2355
2359 warn "leave emergency perl save\n"; 2356 warn "leave emergency perl save\n";
2357}
2358
2359sub post_cleanup {
2360 my ($make_core) = @_;
2361
2362 warn Carp::longmess "post_cleanup backtrace"
2363 if $make_core;
2360} 2364}
2361 2365
2362sub reload() { 2366sub reload() {
2363 # can/must only be called in main 2367 # can/must only be called in main
2364 if ($Coro::current != $Coro::main) { 2368 if ($Coro::current != $Coro::main) {
… …
2366 return; 2370 return;
2367 } 2371 }
2368 2372
2369 warn "reloading..."; 2373 warn "reloading...";
2370 2374
2371 warn "cancelling server ticker"; 2375 warn "entering sync_job";
2372 $TICK_WATCHER->cancel;
2373 2376
2377 sync_job {
2378 write_runtime;
2374 cf::emergency_save; 2379 cf::emergency_save;
2380 write_runtime;
2375 2381
2376 eval { 2382 warn "syncing database to disk";
2383 BDB::db_env_txn_checkpoint $DB_ENV;
2384
2377 # if anything goes wrong in here, we should simply crash as we already saved 2385 # if anything goes wrong in here, we should simply crash as we already saved
2378
2379 warn "syncing database to disk";
2380 cf::db_sync;
2381 2386
2382 warn "cancelling all WF_AUTOCANCEL watchers"; 2387 warn "cancelling all WF_AUTOCANCEL watchers";
2383 for (Event::all_watchers) { 2388 for (Event::all_watchers) {
2384 $_->cancel if $_->data & WF_AUTOCANCEL; 2389 $_->cancel if $_->data & WF_AUTOCANCEL;
2385 } 2390 }
2386 2391
2387 warn "flushing outstanding aio requests"; 2392 warn "flushing outstanding aio requests";
2388 for (;;) { 2393 for (;;) {
2394 BDB::flush;
2389 IO::AIO::flush; 2395 IO::AIO::flush;
2390 Coro::cede; 2396 Coro::cede;
2391 last unless IO::AIO::nreqs; 2397 last unless IO::AIO::nreqs || BDB::nreqs;
2392 warn "iterate..."; 2398 warn "iterate...";
2393 } 2399 }
2394 2400
2395 warn "cancelling all extension coros"; 2401 warn "cancelling all extension coros";
2396 $_->cancel for values %EXT_CORO; 2402 $_->cancel for values %EXT_CORO;
… …
2451 require cf; 2457 require cf;
2452 cf::_connect_to_perl; # nominally unnecessary, but cannot hurt 2458 cf::_connect_to_perl; # nominally unnecessary, but cannot hurt
2453 2459
2454 warn "loading config and database again"; 2460 warn "loading config and database again";
2455 cf::cfg_load; 2461 cf::cfg_load;
2456 cf::db_load;
2457 2462
2458 warn "loading extensions"; 2463 warn "loading extensions";
2459 cf::load_extensions; 2464 cf::load_extensions;
2460 2465
2461 warn "reattaching attachments to objects/players"; 2466 warn "reattaching attachments to objects/players";
2462 _global_reattach; 2467 _global_reattach;
2463 warn "reattaching attachments to maps"; 2468 warn "reattaching attachments to maps";
2464 reattach $_ for values %MAP; 2469 reattach $_ for values %MAP;
2465 2470
2466 warn "restarting server ticker"; 2471 warn "loading reloadable resources";
2472 load_resources;
2467 2473
2468 $TICK_WATCHER->start; 2474 warn "leaving sync_job";
2469 };
2470 2475
2471 if ($@) { 2476 1
2477 } or do {
2472 warn $@; 2478 warn $@;
2473 warn "error while reloading, exiting."; 2479 warn "error while reloading, exiting.";
2474 exit 1; 2480 exit 1;
2475 } 2481 };
2476 2482
2477 warn "reloaded"; 2483 warn "reloaded";
2478}; 2484};
2479 2485
2480our $RELOAD_WATCHER; # used only during reload 2486our $RELOAD_WATCHER; # used only during reload
… …
2524 $NEXT_TICK += $TICK; 2530 $NEXT_TICK += $TICK;
2525 2531
2526 $WAIT_FOR_TICK->broadcast; 2532 $WAIT_FOR_TICK->broadcast;
2527 $WAIT_FOR_TICK_ONE->send if $WAIT_FOR_TICK_ONE->awaited; 2533 $WAIT_FOR_TICK_ONE->send if $WAIT_FOR_TICK_ONE->awaited;
2528 2534
2529 Event::sweep;
2530 Coro::cede_notself;
2531
2532# my $AFTER = Event::time; 2535# my $AFTER = Event::time;
2533# warn $AFTER - $NOW;#d# 2536# warn $AFTER - $NOW;#d#
2534 2537
2535 # if we are delayed by four ticks or more, skip them all 2538 # if we are delayed by four ticks or more, skip them all
2536 $NEXT_TICK = Event::time if Event::time >= $NEXT_TICK + $TICK * 4; 2539 $NEXT_TICK = Event::time if Event::time >= $NEXT_TICK + $TICK * 4;
… …
2538 $TICK_WATCHER->at ($NEXT_TICK); 2541 $TICK_WATCHER->at ($NEXT_TICK);
2539 $TICK_WATCHER->start; 2542 $TICK_WATCHER->start;
2540 }, 2543 },
2541); 2544);
2542 2545
2546{
2547 BDB::max_poll_time $TICK * 0.1;
2548 $BDB_POLL_WATCHER = Event->io (
2549 reentrant => 0,
2550 fd => BDB::poll_fileno,
2551 poll => 'r',
2552 prio => 0,
2553 data => WF_AUTOCANCEL,
2554 cb => \&BDB::poll_cb,
2555 );
2556 BDB::min_parallel 8;
2557
2558 BDB::set_sync_prepare {
2559 my $status;
2560 my $current = $Coro::current;
2561 (
2562 sub {
2563 $status = $!;
2564 $current->ready; undef $current;
2565 },
2566 sub {
2567 Coro::schedule while defined $current;
2568 $! = $status;
2569 },
2570 )
2571 };
2572
2573 unless ($DB_ENV) {
2574 $DB_ENV = BDB::db_env_create;
2575
2576 cf::sync_job {
2577 eval {
2578 BDB::db_env_open
2579 $DB_ENV,
2580 $BDB_ENV_DIR,
2581 BDB::INIT_LOCK | BDB::INIT_LOG | BDB::INIT_MPOOL | BDB::INIT_TXN
2582 | BDB::RECOVER | BDB::REGISTER | BDB::USE_ENVIRON | BDB::CREATE,
2583 0666;
2584
2585 cf::cleanup "db_env_open($BDB_ENV_DIR): $!" if $!;
2586
2587 $DB_ENV->set_flags (BDB::AUTO_COMMIT | BDB::REGION_INIT | BDB::TXN_NOSYNC, 1);
2588 $DB_ENV->set_lk_detect;
2589 };
2590
2591 cf::cleanup "db_env_open(db): $@" if $@;
2592 };
2593 }
2594}
2595
2596{
2597 IO::AIO::min_parallel 8;
2598
2599 undef $Coro::AIO::WATCHER;
2543IO::AIO::max_poll_time $TICK * 0.1; 2600 IO::AIO::max_poll_time $TICK * 0.1;
2544
2545undef $Coro::AIO::WATCHER;
2546$AIO_POLL_WATCHER = Event->io ( 2601 $AIO_POLL_WATCHER = Event->io (
2547 reentrant => 0, 2602 reentrant => 0,
2548 fd => IO::AIO::poll_fileno, 2603 fd => IO::AIO::poll_fileno,
2549 poll => 'r', 2604 poll => 'r',
2550 prio => 6, 2605 prio => 6,
2551 data => WF_AUTOCANCEL, 2606 data => WF_AUTOCANCEL,
2552 cb => \&IO::AIO::poll_cb, 2607 cb => \&IO::AIO::poll_cb,
2553); 2608 );
2609}
2554 2610
2555$WRITE_RUNTIME_WATCHER = Event->timer ( 2611$WRITE_RUNTIME_WATCHER = Event->timer (
2556 reentrant => 0, 2612 reentrant => 0,
2557 data => WF_AUTOCANCEL, 2613 data => WF_AUTOCANCEL,
2614 parked => 1,
2558 after => 1, 2615 after => 1,
2559 interval => 10, 2616 interval => 10,
2560 prio => 6, # keep it lowest so it acts like a watchdog 2617 prio => 6, # keep it lowest so it acts like a watchdog
2561 cb => Coro::unblock_sub { 2618 cb => sub {
2619 $TICK_WATCHER->is_active or cf::cleanup "mainloop frozen but runtime active", 1;
2620
2621 Coro::async_pool {
2562 write_runtime 2622 write_runtime
2563 or warn "ERROR: unable to write runtime file: $!"; 2623 or warn "ERROR: unable to write runtime file: $!";
2624 };
2564 }, 2625 },
2565); 2626);
2566 2627
2567END { cf::emergency_save } 2628END { cf::emergency_save }
2568 2629

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