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Comparing deliantra/Deliantra-Client/DC/DB.pm (file contents):
Revision 1.15 by root, Mon Aug 6 02:11:45 2007 UTC vs.
Revision 1.42 by root, Sun Jan 4 10:22:19 2009 UTC

1=head1 NAME 1=head1 NAME
2 2
3CFPlus::DB - async. database and filesystem access for cfplus 3DC::DB - async. database and filesystem access for deliantra
4 4
5=head1 SYNOPSIS 5=head1 SYNOPSIS
6 6
7 use CFPlus::DB; 7 use DC::DB;
8 8
9=head1 DESCRIPTION 9=head1 DESCRIPTION
10 10
11=over 4 11=over 4
12 12
13=cut 13=cut
14 14
15package CFPlus::DB; 15package DC::DB;
16 16
17use strict; 17use strict;
18use utf8; 18use utf8;
19 19
20use File::Path ();
20use Carp (); 21use Carp ();
21use Storable (); 22use Storable ();
23use AnyEvent::Util ();
22use Config; 24use Config;
23use Event (); 25use BDB;
24 26
25use CFPlus; 27use DC;
26 28
27our $DB_HOME = "$Crossfire::VARDIR/cfplus-$BerkeleyDB::db_version-$Config{archname}"; 29our $ODBDIR = "cfplus-" . BDB::VERSION_MAJOR . "." . BDB::VERSION_MINOR . "-$Config{archname}";
30our $DBDIR = "client-" . BDB::VERSION_MAJOR . "." . BDB::VERSION_MINOR . "-$Config{archname}";
31our $DB_HOME = "$Deliantra::VARDIR/$DBDIR";
32
33sub FIRST_TILE_ID () { 64 }
34
35unless (-d $DB_HOME) {
36 if (-d "$Deliantra::VARDIR/$ODBDIR") {
37 rename "$Deliantra::VARDIR/$ODBDIR", $DB_HOME;
38 print STDERR "INFO: moved old database from $Deliantra::VARDIR/$ODBDIR to $DB_HOME\n";
39 } elsif (-d "$Deliantra::OLDDIR/$ODBDIR") {
40 rename "$Deliantra::OLDDIR/$DBDIR", $DB_HOME;
41 print STDERR "INFO: moved old database from $Deliantra::OLDDIR/$ODBDIR to $DB_HOME\n";
42 } else {
43 File::Path::mkpath [$DB_HOME]
44 or die "unable to create database directory $DB_HOME: $!";
45 }
46}
47
48BDB::max_poll_time 0.03;
49BDB::max_parallel 1;
50
51our $DB_ENV;
52our $DB_STATE;
53our %DB_TABLE;
54our $TILE_SEQ;
55
56sub try_open_db {
57 File::Path::mkpath [$DB_HOME];
58
59 my $env = db_env_create;
60
61 $env->set_errfile (\*STDERR);
62 $env->set_msgfile (\*STDERR);
63 $env->set_verbose (-1, 1);
64
65 $env->set_flags (BDB::AUTO_COMMIT | BDB::REGION_INIT);
66 $env->set_flags (&BDB::LOG_AUTOREMOVE ) if BDB::VERSION v0, v4.7;
67 $env->log_set_config (&BDB::LOG_AUTO_REMOVE) if BDB::VERSION v4.7;
68
69 $env->set_timeout (3, BDB::SET_TXN_TIMEOUT);
70 $env->set_timeout (3, BDB::SET_LOCK_TIMEOUT);
71
72 $env->set_cachesize (0, 2048 * 1024, 0);
73
74 db_env_open $env, $DB_HOME,
75 BDB::CREATE | BDB::REGISTER | BDB::RECOVER | BDB::INIT_MPOOL | BDB::INIT_LOCK | BDB::INIT_TXN,
76 0666;
77
78 $! and die "cannot open database environment $DB_HOME: " . BDB::strerror;
79
80 $DB_ENV = $env;
81
82 1
83}
84
85sub table($) {
86 $DB_TABLE{$_[0]} ||= do {
87 my ($table) = @_;
88
89 $table =~ s/([^a-zA-Z0-9_\-])/sprintf "=%x=", ord $1/ge;
90
91 $DB_ENV#d#
92 or return ::clienterror ("trying to create table $_[0] with empty db_env $DB_ENV" => 1);#d#
93
94 my $db = db_create $DB_ENV;
95 $db->set_flags (BDB::CHKSUM);
96
97 db_open $db, undef, $table, undef, BDB::BTREE,
98 BDB::AUTO_COMMIT | BDB::CREATE | BDB::READ_UNCOMMITTED, 0666;
99
100 $! and "unable to open/create database table $_[0]: ". BDB::strerror;
101
102 $db
103 }
104}
105
106#############################################################################
107
108our $WATCHER;
109our $SYNC;
110our $facemap;
111
112sub exists($$$) {
113 my ($db, $key, $cb) = @_;
114
115 my $data;
116 db_get table $db, undef, $key, $data, 0, sub {
117 $cb->($! ? () : length $data);
118 };
119}
120
121sub get($$$) {
122 my ($db, $key, $cb) = @_;
123
124 my $data;
125 db_get table $db, undef, $key, $data, 0, sub {
126 $cb->($! ? () : $data);
127 };
128}
129
130sub put($$$$) {
131 my ($db, $key, $data, $cb) = @_;
132
133 db_put table $db, undef, $key, $data, 0, sub {
134 $cb->($!);
135 $SYNC->again unless $SYNC->is_active;
136 };
137}
138
139sub do_table {
140 my ($db, $cb) = @_;
141
142 $db = table $db;
143
144 my $cursor = $db->cursor;
145 my %kv;
146
147 for (;;) {
148 db_c_get $cursor, my $k, my $v, BDB::NEXT;
149 last if $!;
150 $kv{$k} = $v;
151 }
152
153 $cb->(\%kv);
154}
155
156sub do_get_tile_id {
157 my ($name, $cb) = @_;
158
159 my $table = table "facemap";
160 my $id;
161
162 db_get $table, undef, $name => $id, 0;
163 $! or return $cb->($id);
164
165 unless ($TILE_SEQ) {
166 $TILE_SEQ = $table->sequence;
167 $TILE_SEQ->initial_value (FIRST_TILE_ID);
168 $TILE_SEQ->set_cachesize (0);
169 db_sequence_open $TILE_SEQ, undef, "id", BDB::CREATE;
170 }
171
172 db_sequence_get $TILE_SEQ, undef, 1, my $id;
173
174 die "unable to allocate tile id: $!"
175 if $!;
176
177 db_put $table, undef, $name => $id, 0;
178 $cb->($id);
179
180}
181
182sub get_tile_id_sync($) {
183 my ($name) = @_;
184
185 $facemap->{$name} ||= do {
186 my $id;
187 do_get_tile_id $name, sub {
188 $id = $_[0];
189 };
190 BDB::flush;
191 $id
192 }
193}
194
195#############################################################################
28 196
29sub path_of_res($) { 197sub path_of_res($) {
30 utf8::downgrade $_[0]; # bug in unpack "H*" 198 utf8::downgrade $_[0]; # bug in unpack "H*"
31 "$DB_HOME/res-data-" . unpack "H*", $_[0] 199 "$DB_HOME/res-data-" . unpack "H*", $_[0]
32} 200}
33 201
34sub sync { 202sub sync {
35 # for debugging 203 # for debugging
36 #CFPlus::DB::Server::req (sync => sub { }); 204 #DC::DB::Server::req (sync => sub { });
37 CFPlus::DB::Server::sync (); 205 DC::DB::Server::sync ();
38}
39
40sub exists($$$) {
41 CFPlus::DB::Server::req (exists => @_);
42}
43
44sub get($$$) {
45 CFPlus::DB::Server::req (get => @_);
46}
47
48sub put($$$$) {
49 CFPlus::DB::Server::req (put => @_);
50} 206}
51 207
52sub unlink($$) { 208sub unlink($$) {
53 CFPlus::DB::Server::req (unlink => @_); 209 DC::DB::Server::req (unlink => @_);
210}
211
212sub read_file($$) {
213 DC::DB::Server::req (read_file => @_);
54} 214}
55 215
56sub write_file($$$) { 216sub write_file($$$) {
57 CFPlus::DB::Server::req (write_file => @_); 217 DC::DB::Server::req (write_file => @_);
58} 218}
59 219
60sub prefetch_file($$$) { 220sub prefetch_file($$$) {
61 CFPlus::DB::Server::req (prefetch_file => @_); 221 DC::DB::Server::req (prefetch_file => @_);
62} 222}
63 223
64sub logprint($$$) { 224sub logprint($$$) {
65 CFPlus::DB::Server::req (logprint => @_); 225 DC::DB::Server::req (logprint => @_);
66} 226}
67 227
68our $tilemap; 228#############################################################################
69 229
70sub get_tile_id_sync($) {
71 my ($hash) = @_;
72
73 # fetch the full face table first
74 unless ($tilemap) {
75 CFPlus::DB::Server::req (table => facemap => sub { $tilemap = $_[0] });
76 sync;
77 }
78
79 $tilemap->{$hash} ||= do {
80 my $id;
81 CFPlus::DB::Server::req (get_tile_id => $hash, sub { $id = $_[0] });
82 sync;
83 $id
84 }
85}
86
87package CFPlus::DB::Server; 230package DC::DB::Server;
88 231
89use strict; 232use strict;
90 233
234use EV ();
91use Fcntl; 235use Fcntl;
92use BerkeleyDB;
93
94our $DB_ENV;
95our $DB_STATE;
96our %DB_TABLE;
97
98sub open_db {
99 mkdir $DB_HOME, 0777;
100 my $recover = $BerkeleyDB::db_version >= 4.4
101 ? eval "DB_REGISTER | DB_RECOVER"
102 : 0;
103
104 $DB_ENV = new BerkeleyDB::Env
105 -Home => $DB_HOME,
106 -Cachesize => 8_000_000,
107 -ErrFile => "$DB_HOME/errorlog.txt",
108# -ErrPrefix => "DATABASE",
109 -Verbose => 1,
110 -Flags => DB_CREATE | DB_RECOVER | DB_INIT_MPOOL | DB_INIT_LOCK | DB_INIT_TXN | $recover,
111 -SetFlags => DB_AUTO_COMMIT | DB_LOG_AUTOREMOVE,
112 or die "unable to create/open database home $DB_HOME: $BerkeleyDB::Error";
113
114 1
115}
116
117sub table($) {
118 $DB_TABLE{$_[0]} ||= do {
119 my ($table) = @_;
120
121 $table =~ s/([^a-zA-Z0-9_\-])/sprintf "=%x=", ord $1/ge;
122
123 new BerkeleyDB::Btree
124 -Env => $DB_ENV,
125 -Filename => $table,
126# -Filename => "database",
127# -Subname => $table,
128 -Property => DB_CHKSUM,
129 -Flags => DB_CREATE | DB_UPGRADE,
130 or die "unable to create/open database table $_[0]: $BerkeleyDB::Error"
131 }
132}
133 236
134our %CB; 237our %CB;
135our $FH; 238our $FH;
136our $ID = "aaa0"; 239our $ID = "aaa0";
137our ($fh_r_watcher, $fh_w_watcher); 240our ($fh_r_watcher, $fh_w_watcher);
138our $sync_timer; 241our $sync_timer;
139our $write_buf; 242our $write_buf;
140our $read_buf; 243our $read_buf;
141 244
142our $SYNC = Event->idle (min => 5, max => 60, parked => 1, cb => sub {
143 CFPlus::DB::Server::req (sync => sub { });
144 $_[0]->w->stop;
145});
146
147sub fh_write { 245sub fh_write {
148 my $len = syswrite $FH, $write_buf; 246 my $len = syswrite $FH, $write_buf;
149 247
150 substr $write_buf, 0, $len, ""; 248 substr $write_buf, 0, $len, "";
151 249
… …
194 my $id = ++$ID; 292 my $id = ++$ID;
195 $write_buf .= pack "N/a*", Storable::freeze [$id, $type, @args]; 293 $write_buf .= pack "N/a*", Storable::freeze [$id, $type, @args];
196 $CB{$id} = $cb; 294 $CB{$id} = $cb;
197 295
198 $fh_w_watcher->start; 296 $fh_w_watcher->start;
199 $SYNC->start;
200}
201
202sub do_sync {
203 $DB_ENV->txn_checkpoint (0, 0, 0);
204 ()
205}
206
207sub do_exists {
208 my ($db, $key) = @_;
209
210 utf8::downgrade $key;
211 my $data;
212 (table $db)->db_get ($key, $data) == 0
213 ? length $data
214 : ()
215}
216
217sub do_get {
218 my ($db, $key) = @_;
219
220 utf8::downgrade $key;
221 my $data;
222 (table $db)->db_get ($key, $data) == 0
223 ? $data
224 : ()
225}
226
227sub do_put {
228 my ($db, $key, $data) = @_;
229
230 utf8::downgrade $key;
231 utf8::downgrade $data;
232 (table $db)->db_put ($key => $data)
233}
234
235sub do_table {
236 my ($db) = @_;
237
238 $db = table $db;
239
240 my $cursor = $db->db_cursor;
241 my %kv;
242 my ($k, $v);
243 $kv{$k} = $v while $cursor->c_get ($k, $v, BerkeleyDB::DB_NEXT) == 0;
244
245 \%kv
246}
247
248sub do_get_tile_id {
249 my ($hash) = @_;
250
251 my $id;
252 my $table = table "facemap";
253
254 return $id
255 if $table->db_get ($hash, $id) == 0;
256
257 for (1..100) {
258 my $txn = $DB_ENV->txn_begin;
259 my $status = $table->db_get (id => $id);
260 if ($status == 0 || $status == BerkeleyDB::DB_NOTFOUND) {
261 $id = ($id || 64) + 1;
262 if ($table->db_put (id => $id) == 0
263 && $table->db_put ($hash => $id) == 0) {
264 $txn->txn_commit;
265
266 return $id;
267 }
268 }
269 $txn->txn_abort;
270 }
271
272 die "maximum number of transaction retries reached - database problems?";
273} 297}
274 298
275sub do_unlink { 299sub do_unlink {
276 unlink $_[0]; 300 unlink $_[0];
277} 301}
278 302
303sub do_read_file {
304 my ($path) = @_;
305
306 utf8::downgrade $path;
307 open my $fh, "<:raw", $path
308 or return;
309 sysread $fh, my $buf, -s $fh;
310
311 $buf
312}
313
279sub do_write_file { 314sub do_write_file {
280 my ($file, $data) = @_; 315 my ($path, $data) = @_;
281 316
282 utf8::downgrade $file; 317 utf8::downgrade $path;
283 utf8::downgrade $data; 318 utf8::downgrade $data;
284 open my $fh, ">:raw", $file 319 open my $fh, ">:raw", $path
285 or return; 320 or return;
286 print $fh $data; 321 syswrite $fh, $data;
287 close $fh; 322 close $fh;
288 323
289 1 324 1
290} 325}
291 326
292sub do_prefetch_file { 327sub do_prefetch_file {
293 my ($file, $size) = @_; 328 my ($path, $size) = @_;
294 329
295 utf8::downgrade $file; 330 utf8::downgrade $path;
296 open my $fh, "<:raw", $file 331 open my $fh, "<:raw", $path
297 or return; 332 or return;
298 sysread $fh, my $buf, $size; 333 sysread $fh, my $buf, $size;
299 334
300 1 335 1
301} 336}
… …
321 356
322 print { $LOG_FH{$path} } "$ts $line\n" 357 print { $LOG_FH{$path} } "$ts $line\n"
323} 358}
324 359
325sub run { 360sub run {
326 ($FH, my $fh) = CFPlus::socketpipe; 361 ($FH, my $fh) = AnyEvent::Util::portable_socketpair
362 or die "unable to create database socketpair: $!";
327 363
328 my $oldfh = select $FH; $| = 1; select $oldfh; 364 my $oldfh = select $FH; $| = 1; select $oldfh;
329 my $oldfh = select $fh; $| = 1; select $oldfh; 365 my $oldfh = select $fh; $| = 1; select $oldfh;
330 366
331 my $pid = fork; 367 my $pid = fork;
332 368
333 if (defined $pid && !$pid) { 369 if (defined $pid && !$pid) {
334 local $SIG{QUIT}; 370 local $SIG{QUIT} = "IGNORE";
335 local $SIG{__DIE__}; 371 local $SIG{__DIE__};
336 local $SIG{__WARN__}; 372 local $SIG{__WARN__};
337 eval { 373 eval {
338 close $FH; 374 close $FH;
339
340 unless (eval { open_db }) {
341 eval { File::Path::rmtree $DB_HOME };
342 open_db;
343 }
344 375
345 while () { 376 while () {
346 4 == read $fh, my $len, 4 377 4 == read $fh, my $len, 4
347 or last; 378 or last;
348 $len = unpack "N", $len; 379 $len = unpack "N", $len;
… …
350 or die "unexpected eof while reading request"; 381 or die "unexpected eof while reading request";
351 382
352 $req = Storable::thaw $req; 383 $req = Storable::thaw $req;
353 384
354 my ($id, $type, @args) = @$req; 385 my ($id, $type, @args) = @$req;
355 my $cb = CFPlus::DB::Server->can ("do_$type") 386 my $cb = DC::DB::Server->can ("do_$type")
356 or die "$type: unknown database request type\n"; 387 or die "$type: unknown database request type\n";
357 my $res = pack "N/a*", Storable::freeze [$id, $cb->(@args)]; 388 my $res = pack "N/a*", Storable::freeze [$id, $cb->(@args)];
358 (syswrite $fh, $res) == length $res 389 (syswrite $fh, $res) == length $res
359 or die; 390 or die "DB::write: $!";
360 } 391 }
361 }; 392 };
362 393
363 my $error = $@; 394 my $error = $@;
364 395
365 eval { 396 eval {
366 undef %DB_TABLE;
367 undef $DB_ENV;
368
369 Storable::store_fd [die => $error], $fh; 397 Storable::store_fd [die => $error], $fh;
370 }; 398 };
371 399
400 warn $error
401 if $error;
402
372 CFPlus::_exit 0; 403 DC::_exit 0;
373 } 404 }
374 405
375 close $fh; 406 close $fh;
376 CFPlus::fh_nonblocking $FH, 1; 407 DC::fh_nonblocking $FH, 1;
377 408
378 $CB{die} = sub { die shift }; 409 $CB{die} = sub { die shift };
379 410
380 $fh_r_watcher = Event->io (fd => $FH, poll => 'r', nice => 1, cb => \&fh_read); 411 $fh_r_watcher = EV::io $FH, EV::READ , \&fh_read;
381 $fh_w_watcher = Event->io (fd => $FH, poll => 'w', nice => -1, parked => 1, cb => \&fh_write); 412 $fh_w_watcher = EV::io $FH, EV::WRITE, \&fh_write;
382 $SYNC->start;
383} 413}
384 414
385sub stop { 415sub stop {
386 close $FH; 416 close $FH;
387} 417}
388 418
419package DC::DB;
420
421sub nuke_db {
422 File::Path::mkpath [$DB_HOME];
423 eval { File::Path::rmtree $DB_HOME };
424}
425
426sub open_db {
427 unless (eval { try_open_db }) {
428 warn "$@";#d#
429 eval { nuke_db };
430 try_open_db;
431 }
432
433 # fetch the full face table first
434 unless ($facemap) {
435 do_table facemap => sub {
436 $facemap = $_[0];
437 delete $facemap->{id};
438 my %maptile = reverse %$facemap;#d#
439 if ((scalar keys %$facemap) != (scalar keys %maptile)) {#d#
440 $facemap = { };#d#
441 DC::error "FATAL: facemap is not a 1:1 mapping, please report this and delete your $DB_HOME directory!\n";#d#
442 }#d#
443 };
444 }
445
446 $WATCHER = EV::io BDB::poll_fileno, EV::READ, \&BDB::poll_cb;
447 $SYNC = EV::timer_ns 0, 60, sub {
448 $_[0]->stop;
449 db_env_txn_checkpoint $DB_ENV, 0, 0, 0, sub { };
450 };
451}
452
453END {
454 db_env_txn_checkpoint $DB_ENV, 0, 0, 0
455 if $DB_ENV;
456
457 undef $TILE_SEQ;
458 %DB_TABLE = ();
459 undef $DB_ENV;
460}
461
3891; 4621;
390 463
391=back 464=back
392 465
393=head1 AUTHOR 466=head1 AUTHOR

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