ViewVC Help
View File | Revision Log | Show Annotations | Download File
/cvs/deliantra/server/lib/cf.pm
(Generate patch)

Comparing deliantra/server/lib/cf.pm (file contents):
Revision 1.202 by root, Mon Jan 29 20:16:28 2007 UTC vs.
Revision 1.214 by root, Wed Feb 14 00:40:05 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
… …
45our $LIBDIR = datadir . "/ext"; 49our $LIBDIR = datadir . "/ext";
46 50
47our $TICK = MAX_TIME * 1e-6; 51our $TICK = MAX_TIME * 1e-6;
48our $TICK_WATCHER; 52our $TICK_WATCHER;
49our $AIO_POLL_WATCHER; 53our $AIO_POLL_WATCHER;
50our $WRITE_RUNTIME_WATCHER; 54our $NEXT_RUNTIME_WRITE; # when should the runtime file be written
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
… …
263sub freeze_mainloop { 273sub freeze_mainloop {
264 return unless $TICK_WATCHER->is_active; 274 return unless $TICK_WATCHER->is_active;
265 275
266 my $guard = Coro::guard { 276 my $guard = Coro::guard {
267 $TICK_WATCHER->start; 277 $TICK_WATCHER->start;
268 $WRITE_RUNTIME_WATCHER->start;
269 }; 278 };
270 $WRITE_RUNTIME_WATCHER->stop;
271 $TICK_WATCHER->stop; 279 $TICK_WATCHER->stop;
272 $guard 280 $guard
273} 281}
274 282
275=item cf::async { BLOCK } 283=item cf::async { BLOCK }
… …
358 # 60 allows for the watchdog to kill the server. 366 # 60 allows for the watchdog to kill the server.
359 367
360 (aio_write $fh, 0, (length $value), $value, 0) <= 0 368 (aio_write $fh, 0, (length $value), $value, 0) <= 0
361 and return; 369 and return;
362 370
371 # always fsync - this file is important
363 aio_fsync $fh 372 aio_fsync $fh
364 and return; 373 and return;
365 374
366 close $fh 375 close $fh
367 or return; 376 or return;
… …
752 $filename, length $$rdata, scalar @$objs; 761 $filename, length $$rdata, scalar @$objs;
753 762
754 if (my $fh = aio_open "$filename~", O_WRONLY | O_CREAT, 0600) { 763 if (my $fh = aio_open "$filename~", O_WRONLY | O_CREAT, 0600) {
755 chmod SAVE_MODE, $fh; 764 chmod SAVE_MODE, $fh;
756 aio_write $fh, 0, (length $$rdata), $$rdata, 0; 765 aio_write $fh, 0, (length $$rdata), $$rdata, 0;
757 aio_fsync $fh; 766 aio_fsync $fh if $cf::USE_FSYNC;
758 close $fh; 767 close $fh;
759 768
760 if (@$objs) { 769 if (@$objs) {
761 if (my $fh = aio_open "$filename.pst~", O_WRONLY | O_CREAT, 0600) { 770 if (my $fh = aio_open "$filename.pst~", O_WRONLY | O_CREAT, 0600) {
762 chmod SAVE_MODE, $fh; 771 chmod SAVE_MODE, $fh;
763 my $data = Storable::nfreeze { version => 1, objs => $objs }; 772 my $data = Storable::nfreeze { version => 1, objs => $objs };
764 aio_write $fh, 0, (length $data), $data, 0; 773 aio_write $fh, 0, (length $data), $data, 0;
765 aio_fsync $fh; 774 aio_fsync $fh if $cf::USE_FSYNC;
766 close $fh; 775 close $fh;
767 aio_rename "$filename.pst~", "$filename.pst"; 776 aio_rename "$filename.pst~", "$filename.pst";
768 } 777 }
769 } else { 778 } else {
770 aio_unlink "$filename.pst"; 779 aio_unlink "$filename.pst";
… …
1598 return if $self->players; 1607 return if $self->players;
1599 return if $self->isa ("ext::map_per_player");#d# 1608 return if $self->isa ("ext::map_per_player");#d#
1600 1609
1601 warn "resetting map ", $self->path;#d# 1610 warn "resetting map ", $self->path;#d#
1602 1611
1612 $self->in_memory (cf::MAP_SWAPPED);
1613
1614 # need to save uniques path
1615 unless ($self->{deny_save}) {
1616 my $uniq = $self->uniq_path; utf8::encode $uniq;
1617
1618 $self->_save_objects ($uniq, cf::IO_UNIQUES)
1619 if $uniq;
1620 }
1621
1603 delete $cf::MAP{$self->path}; 1622 delete $cf::MAP{$self->path};
1604 1623
1605 $self->in_memory (cf::MAP_SWAPPED);
1606 $self->clear; 1624 $self->clear;
1607 1625
1608 $_->clear_links_to ($self) for values %cf::MAP; 1626 $_->clear_links_to ($self) for values %cf::MAP;
1609 1627
1610 $self->unlink_save; 1628 $self->unlink_save;
… …
2174The parameter C<$family> should best start with the name of the extension 2192The parameter C<$family> should best start with the name of the extension
2175using it, it should be unique. 2193using it, it should be unique.
2176 2194
2177=over 4 2195=over 4
2178 2196
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 2197=item $value = cf::db_get $family => $key
2186 2198
2187Returns a single value from the database 2199Returns 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 2200
2194=item cf::db_put $family => $key => $value 2201=item cf::db_put $family => $key => $value
2195 2202
2196Stores the given C<$value> in the family hash. Updates are delayed, if you 2203Stores 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 2204
2207=cut 2205=cut
2208 2206
2209our $DB; 2207our $DB;
2210 2208
2211{ 2209sub db_init {
2210 unless ($DB) {
2211 $DB = BDB::db_create $DB_ENV;
2212
2213 cf::sync_job {
2214 eval {
2215 $DB->set_flags (BDB::CHKSUM);
2216
2217 BDB::db_open $DB, undef, "db", undef, BDB::BTREE,
2218 BDB::CREATE | BDB::AUTO_COMMIT, 0666;
2219 cf::cleanup "db_open(db): $!" if $!;
2220 };
2221 cf::cleanup "db_open(db): $@" if $@;
2222 };
2223
2212 my $path = cf::localdir . "/database.pst"; 2224 my $path = cf::localdir . "/database.pst";
2225 if (stat $path) {
2226 cf::sync_job {
2227 my $pst = Storable::retrieve $path;
2213 2228
2214 sub db_load() { 2229 cf::db_put (board => data => $pst->{board});
2215 $DB = stat $path ? Storable::retrieve $path : { }; 2230 cf::db_put (guildrules => data => $pst->{guildrules});
2216 } 2231 cf::db_put (rent => balance => $pst->{rent}{balance});
2232 BDB::db_env_txn_checkpoint $DB_ENV;
2217 2233
2218 my $pid; 2234 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 } 2235 };
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($$;$) {
2258 if (@_ >= 3) {
2259 $DB->{$_[0]}{$_[1]} = $_[2];
2260 } else {
2261 $DB->{$_[0]} = $_[1];
2262 }
2263 db_dirty;
2264 }
2265
2266 cf::global->attach (
2267 prio => 10000,
2268 on_cleanup => sub {
2269 db_sync;
2270 }, 2236 }
2271 ); 2237 }
2238}
2239
2240sub db_get($$) {
2241 my $key = "$_[0]/$_[1]";
2242
2243 cf::sync_job {
2244 BDB::db_get $DB, undef, $key, my $data;
2245
2246 $! ? ()
2247 : Compress::LZF::sthaw $data
2248 }
2249}
2250
2251sub db_put($$$) {
2252 BDB::dbreq_pri 4;
2253 BDB::db_put $DB, undef, "$_[0]/$_[1]", Compress::LZF::sfreeze_cr $_[2], 0, sub { };
2272} 2254}
2273 2255
2274############################################################################# 2256#############################################################################
2275# the server's main() 2257# the server's init and main functions
2258
2259sub load_resources {
2260 load_regions sprintf "%s/%s/regions", cf::datadir, cf::mapdir
2261 or die "unable to load regions file\n";#d#
2262}
2276 2263
2277sub cfg_load { 2264sub cfg_load {
2278 open my $fh, "<:utf8", cf::confdir . "/config" 2265 open my $fh, "<:utf8", cf::confdir . "/config"
2279 or return; 2266 or return;
2280 2267
… …
2291 $CFG{mlockall} ? eval "mlockall()" : eval "munlockall()" 2278 $CFG{mlockall} ? eval "mlockall()" : eval "munlockall()"
2292 and die "WARNING: m(un)lockall failed: $!\n"; 2279 and die "WARNING: m(un)lockall failed: $!\n";
2293 }; 2280 };
2294 warn $@ if $@; 2281 warn $@ if $@;
2295 } 2282 }
2283}
2284
2285sub init {
2286 load_resources;
2296} 2287}
2297 2288
2298sub main { 2289sub main {
2299 # we must not ever block the main coroutine 2290 # we must not ever block the main coroutine
2300 local $Coro::idle = sub { 2291 local $Coro::idle = sub {
… …
2303 Event::one_event; 2294 Event::one_event;
2304 })->prio (Coro::PRIO_MAX); 2295 })->prio (Coro::PRIO_MAX);
2305 }; 2296 };
2306 2297
2307 cfg_load; 2298 cfg_load;
2308 db_load; 2299 db_init;
2309 load_extensions; 2300 load_extensions;
2310 2301
2311 $TICK_WATCHER->start; 2302 $TICK_WATCHER->start;
2312 Event::loop; 2303 Event::loop;
2313} 2304}
… …
2352 my $map = $cf::MAP{$path} or next; 2343 my $map = $cf::MAP{$path} or next;
2353 $map->valid or next; 2344 $map->valid or next;
2354 $map->save; 2345 $map->save;
2355 } 2346 }
2356 warn "end emergency map save\n"; 2347 warn "end emergency map save\n";
2348
2349 warn "begin emergency database checkpoint\n";
2350 BDB::db_env_txn_checkpoint $DB_ENV;
2351 warn "end emergency database checkpoint\n";
2357 }; 2352 };
2358 2353
2359 warn "leave emergency perl save\n"; 2354 warn "leave emergency perl save\n";
2355}
2356
2357sub post_cleanup {
2358 my ($make_core) = @_;
2359
2360 warn Carp::longmess "post_cleanup backtrace"
2361 if $make_core;
2360} 2362}
2361 2363
2362sub reload() { 2364sub reload() {
2363 # can/must only be called in main 2365 # can/must only be called in main
2364 if ($Coro::current != $Coro::main) { 2366 if ($Coro::current != $Coro::main) {
… …
2366 return; 2368 return;
2367 } 2369 }
2368 2370
2369 warn "reloading..."; 2371 warn "reloading...";
2370 2372
2371 warn "cancelling server ticker"; 2373 warn "entering sync_job";
2372 $TICK_WATCHER->cancel;
2373 2374
2375 cf::sync_job {
2376 cf::write_runtime; # external watchdog should not bark
2374 cf::emergency_save; 2377 cf::emergency_save;
2378 cf::write_runtime; # external watchdog should not bark
2375 2379
2376 eval { 2380 warn "syncing database to disk";
2381 BDB::db_env_txn_checkpoint $DB_ENV;
2382
2377 # if anything goes wrong in here, we should simply crash as we already saved 2383 # 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 2384
2382 warn "cancelling all WF_AUTOCANCEL watchers"; 2385 warn "cancelling all WF_AUTOCANCEL watchers";
2383 for (Event::all_watchers) { 2386 for (Event::all_watchers) {
2384 $_->cancel if $_->data & WF_AUTOCANCEL; 2387 $_->cancel if $_->data & WF_AUTOCANCEL;
2385 } 2388 }
2386 2389
2387 warn "flushing outstanding aio requests"; 2390 warn "flushing outstanding aio requests";
2388 for (;;) { 2391 for (;;) {
2392 BDB::flush;
2389 IO::AIO::flush; 2393 IO::AIO::flush;
2390 Coro::cede; 2394 Coro::cede;
2391 last unless IO::AIO::nreqs; 2395 last unless IO::AIO::nreqs || BDB::nreqs;
2392 warn "iterate..."; 2396 warn "iterate...";
2393 } 2397 }
2394 2398
2395 warn "cancelling all extension coros"; 2399 warn "cancelling all extension coros";
2396 $_->cancel for values %EXT_CORO; 2400 $_->cancel for values %EXT_CORO;
… …
2451 require cf; 2455 require cf;
2452 cf::_connect_to_perl; # nominally unnecessary, but cannot hurt 2456 cf::_connect_to_perl; # nominally unnecessary, but cannot hurt
2453 2457
2454 warn "loading config and database again"; 2458 warn "loading config and database again";
2455 cf::cfg_load; 2459 cf::cfg_load;
2456 cf::db_load;
2457 2460
2458 warn "loading extensions"; 2461 warn "loading extensions";
2459 cf::load_extensions; 2462 cf::load_extensions;
2460 2463
2461 warn "reattaching attachments to objects/players"; 2464 warn "reattaching attachments to objects/players";
2462 _global_reattach; 2465 _global_reattach;
2463 warn "reattaching attachments to maps"; 2466 warn "reattaching attachments to maps";
2464 reattach $_ for values %MAP; 2467 reattach $_ for values %MAP;
2465 2468
2466 warn "restarting server ticker"; 2469 warn "loading reloadable resources";
2470 load_resources;
2467 2471
2468 $TICK_WATCHER->start; 2472 warn "leaving sync_job";
2469 };
2470 2473
2471 if ($@) { 2474 1
2475 } or do {
2472 warn $@; 2476 warn $@;
2473 warn "error while reloading, exiting."; 2477 warn "error while reloading, exiting.";
2474 exit 1; 2478 exit 1;
2475 } 2479 };
2476 2480
2477 warn "reloaded"; 2481 warn "reloaded";
2478}; 2482};
2479 2483
2480our $RELOAD_WATCHER; # used only during reload 2484our $RELOAD_WATCHER; # used only during reload
… …
2521 2525
2522 cf::server_tick; # one server iteration 2526 cf::server_tick; # one server iteration
2523 $RUNTIME += $TICK; 2527 $RUNTIME += $TICK;
2524 $NEXT_TICK += $TICK; 2528 $NEXT_TICK += $TICK;
2525 2529
2530 if ($NOW >= $NEXT_RUNTIME_WRITE) {
2531 $NEXT_RUNTIME_WRITE = $NOW + 10;
2532 Coro::async_pool {
2533 write_runtime
2534 or warn "ERROR: unable to write runtime file: $!";
2535 };
2536 }
2537
2538
2526 $WAIT_FOR_TICK->broadcast; 2539 $WAIT_FOR_TICK->broadcast;
2527 $WAIT_FOR_TICK_ONE->send if $WAIT_FOR_TICK_ONE->awaited; 2540 $WAIT_FOR_TICK_ONE->send if $WAIT_FOR_TICK_ONE->awaited;
2528 2541
2529 Event::sweep;
2530 Coro::cede_notself;
2531
2532# my $AFTER = Event::time; 2542# my $AFTER = Event::time;
2533# warn $AFTER - $NOW;#d# 2543# warn $AFTER - $NOW;#d#
2534 2544
2535 # if we are delayed by four ticks or more, skip them all 2545 # if we are delayed by four ticks or more, skip them all
2536 $NEXT_TICK = Event::time if Event::time >= $NEXT_TICK + $TICK * 4; 2546 $NEXT_TICK = Event::time if Event::time >= $NEXT_TICK + $TICK * 4;
… …
2538 $TICK_WATCHER->at ($NEXT_TICK); 2548 $TICK_WATCHER->at ($NEXT_TICK);
2539 $TICK_WATCHER->start; 2549 $TICK_WATCHER->start;
2540 }, 2550 },
2541); 2551);
2542 2552
2553{
2554 BDB::max_poll_time $TICK * 0.1;
2555 $BDB_POLL_WATCHER = Event->io (
2556 reentrant => 0,
2557 fd => BDB::poll_fileno,
2558 poll => 'r',
2559 prio => 0,
2560 data => WF_AUTOCANCEL,
2561 cb => \&BDB::poll_cb,
2562 );
2563 BDB::min_parallel 8;
2564
2565 BDB::set_sync_prepare {
2566 my $status;
2567 my $current = $Coro::current;
2568 (
2569 sub {
2570 $status = $!;
2571 $current->ready; undef $current;
2572 },
2573 sub {
2574 Coro::schedule while defined $current;
2575 $! = $status;
2576 },
2577 )
2578 };
2579
2580 unless ($DB_ENV) {
2581 $DB_ENV = BDB::db_env_create;
2582
2583 cf::sync_job {
2584 eval {
2585 BDB::db_env_open
2586 $DB_ENV,
2587 $BDB_ENV_DIR,
2588 BDB::INIT_LOCK | BDB::INIT_LOG | BDB::INIT_MPOOL | BDB::INIT_TXN
2589 | BDB::RECOVER | BDB::REGISTER | BDB::USE_ENVIRON | BDB::CREATE,
2590 0666;
2591
2592 cf::cleanup "db_env_open($BDB_ENV_DIR): $!" if $!;
2593
2594 $DB_ENV->set_flags (BDB::AUTO_COMMIT | BDB::REGION_INIT | BDB::TXN_NOSYNC, 1);
2595 $DB_ENV->set_lk_detect;
2596 };
2597
2598 cf::cleanup "db_env_open(db): $@" if $@;
2599 };
2600 }
2601}
2602
2603{
2604 IO::AIO::min_parallel 8;
2605
2606 undef $Coro::AIO::WATCHER;
2543IO::AIO::max_poll_time $TICK * 0.1; 2607 IO::AIO::max_poll_time $TICK * 0.1;
2544
2545undef $Coro::AIO::WATCHER;
2546$AIO_POLL_WATCHER = Event->io ( 2608 $AIO_POLL_WATCHER = Event->io (
2547 reentrant => 0, 2609 reentrant => 0,
2610 data => WF_AUTOCANCEL,
2548 fd => IO::AIO::poll_fileno, 2611 fd => IO::AIO::poll_fileno,
2549 poll => 'r', 2612 poll => 'r',
2550 prio => 6, 2613 prio => 6,
2551 data => WF_AUTOCANCEL,
2552 cb => \&IO::AIO::poll_cb, 2614 cb => \&IO::AIO::poll_cb,
2553); 2615 );
2554 2616}
2555$WRITE_RUNTIME_WATCHER = Event->timer (
2556 reentrant => 0,
2557 data => WF_AUTOCANCEL,
2558 after => 1,
2559 interval => 10,
2560 prio => 6, # keep it lowest so it acts like a watchdog
2561 cb => Coro::unblock_sub {
2562 write_runtime
2563 or warn "ERROR: unable to write runtime file: $!";
2564 },
2565);
2566 2617
2567END { cf::emergency_save } 2618END { cf::emergency_save }
2568 2619
25691 26201
2570 2621

Diff Legend

– Removed lines
+ Added lines
< Changed lines
> Changed lines