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Comparing deliantra/Deliantra-Client/DC/DB.pm (file contents):
Revision 1.23 by root, Fri Nov 16 04:54:25 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;
25use BDB;
23 26
24use CFPlus; 27use DC;
25 28
26our $DB_HOME = "$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($$$$) {
131 my ($db, $key, $data, $cb) = @_;
132
133 db_put table $db, undef, $key, $data, 0, sub {
134 $cb->($!);
135 $SYNC->again unless $SYNC->is_active;
136 };
137}
138
139sub do_table {
140 my ($db, $cb) = @_;
141
142 $db = table $db;
143
144 my $cursor = $db->cursor;
145 my %kv;
146
147 for (;;) {
148 db_c_get $cursor, my $k, my $v, BDB::NEXT;
149 last if $!;
150 $kv{$k} = $v;
151 }
152
153 $cb->(\%kv);
154}
155
156sub do_get_tile_id {
157 my ($name, $cb) = @_;
158
159 my $table = table "facemap";
160 my $id;
161
162 db_get $table, undef, $name => $id, 0;
163 $! or return $cb->($id);
164
165 unless ($TILE_SEQ) {
166 $TILE_SEQ = $table->sequence;
167 $TILE_SEQ->initial_value (FIRST_TILE_ID);
168 $TILE_SEQ->set_cachesize (0);
169 db_sequence_open $TILE_SEQ, undef, "id", BDB::CREATE;
170 }
171
172 db_sequence_get $TILE_SEQ, undef, 1, my $id;
173
174 die "unable to allocate tile id: $!"
175 if $!;
176
177 db_put $table, undef, $name => $id, 0;
178 $cb->($id);
179
180}
181
182sub get_tile_id_sync($) {
183 my ($name) = @_;
184
185 $facemap->{$name} ||= do {
186 my $id;
187 do_get_tile_id $name, sub {
188 $id = $_[0];
189 };
190 BDB::flush;
191 $id
192 }
193}
194
195#############################################################################
27 196
28sub path_of_res($) { 197sub path_of_res($) {
29 utf8::downgrade $_[0]; # bug in unpack "H*" 198 utf8::downgrade $_[0]; # bug in unpack "H*"
30 "$DB_HOME/res-data-" . unpack "H*", $_[0] 199 "$DB_HOME/res-data-" . unpack "H*", $_[0]
31} 200}
32 201
33sub sync { 202sub sync {
34 # for debugging 203 # for debugging
35 #CFPlus::DB::Server::req (sync => sub { }); 204 #DC::DB::Server::req (sync => sub { });
36 CFPlus::DB::Server::sync (); 205 DC::DB::Server::sync ();
37}
38
39sub exists($$$) {
40 CFPlus::DB::Server::req (exists => @_);
41}
42
43sub get($$$) {
44 CFPlus::DB::Server::req (get => @_);
45}
46
47sub put($$$$) {
48 CFPlus::DB::Server::req (put => @_);
49} 206}
50 207
51sub unlink($$) { 208sub unlink($$) {
52 CFPlus::DB::Server::req (unlink => @_); 209 DC::DB::Server::req (unlink => @_);
53} 210}
54 211
55sub read_file($$) { 212sub read_file($$) {
56 CFPlus::DB::Server::req (read_file => @_); 213 DC::DB::Server::req (read_file => @_);
57} 214}
58 215
59sub write_file($$$) { 216sub write_file($$$) {
60 CFPlus::DB::Server::req (write_file => @_); 217 DC::DB::Server::req (write_file => @_);
61} 218}
62 219
63sub prefetch_file($$$) { 220sub prefetch_file($$$) {
64 CFPlus::DB::Server::req (prefetch_file => @_); 221 DC::DB::Server::req (prefetch_file => @_);
65} 222}
66 223
67sub logprint($$$) { 224sub logprint($$$) {
68 CFPlus::DB::Server::req (logprint => @_); 225 DC::DB::Server::req (logprint => @_);
69} 226}
70 227
71our $tilemap; 228#############################################################################
72 229
73sub get_tile_id_sync($) {
74 my ($name) = @_;
75
76 # fetch the full face table first
77 unless ($tilemap) {
78 CFPlus::DB::Server::req (table => facemap => sub {
79 $tilemap = $_[0];
80 delete $tilemap->{id};
81 my %maptile = reverse %$tilemap;#d#
82 if ((scalar keys %$tilemap) != (scalar keys %maptile)) {#d#
83 $tilemap = { };#d#
84 CFPlus::error "FATAL: facemap is not a 1:1 mapping, please report this and delete your $DB_HOME directory!\n";#d#
85 }#d#
86 });
87 sync;
88 }
89
90 $tilemap->{$name} ||= do {
91 my $id;
92 CFPlus::DB::Server::req (get_tile_id => $name, sub { $id = $_[0] });
93 sync;
94 $id
95 }
96}
97
98package CFPlus::DB::Server; 230package DC::DB::Server;
99 231
100use strict; 232use strict;
101 233
102use EV (); 234use EV ();
103use Fcntl; 235use Fcntl;
104use BerkeleyDB;
105
106our $DB_ENV;
107our $DB_STATE;
108our %DB_TABLE;
109
110sub open_db {
111 mkdir $DB_HOME, 0777;
112 my $recover = $BerkeleyDB::db_version >= 4.4
113 ? eval "DB_REGISTER | DB_RECOVER"
114 : 0;
115
116 $DB_ENV = new BerkeleyDB::Env
117 -Home => $DB_HOME,
118 -Cachesize => 8_000_000,
119 -ErrFile => "$DB_HOME/errorlog.txt",
120# -ErrPrefix => "DATABASE",
121 -Verbose => 1,
122 -Flags => DB_CREATE | DB_RECOVER | DB_INIT_MPOOL | DB_INIT_LOCK | DB_INIT_TXN | $recover,
123 -SetFlags => DB_AUTO_COMMIT | DB_LOG_AUTOREMOVE | DB_TXN_WRITE_NOSYNC,
124 or die "unable to create/open database home $DB_HOME: $BerkeleyDB::Error";
125
126 1
127}
128
129sub table($) {
130 $DB_TABLE{$_[0]} ||= do {
131 my ($table) = @_;
132
133 $table =~ s/([^a-zA-Z0-9_\-])/sprintf "=%x=", ord $1/ge;
134
135 new BerkeleyDB::Btree
136 -Env => $DB_ENV,
137 -Filename => $table,
138# -Filename => "database",
139# -Subname => $table,
140 -Property => DB_CHKSUM,
141 -Flags => DB_AUTO_COMMIT | DB_CREATE | DB_UPGRADE,
142 or die "unable to create/open database table $_[0]: $BerkeleyDB::Error"
143 }
144}
145 236
146our %CB; 237our %CB;
147our $FH; 238our $FH;
148our $ID = "aaa0"; 239our $ID = "aaa0";
149our ($fh_r_watcher, $fh_w_watcher); 240our ($fh_r_watcher, $fh_w_watcher);
150our $sync_timer; 241our $sync_timer;
151our $write_buf; 242our $write_buf;
152our $read_buf; 243our $read_buf;
153 244
154our $SYNC = EV::timer_ns 0, 60, sub {
155 $_[0]->stop;
156 CFPlus::DB::Server::req (sync => sub { });
157};
158
159sub fh_write { 245sub fh_write {
160 my $len = syswrite $FH, $write_buf; 246 my $len = syswrite $FH, $write_buf;
161 247
162 substr $write_buf, 0, $len, ""; 248 substr $write_buf, 0, $len, "";
163 249
… …
206 my $id = ++$ID; 292 my $id = ++$ID;
207 $write_buf .= pack "N/a*", Storable::freeze [$id, $type, @args]; 293 $write_buf .= pack "N/a*", Storable::freeze [$id, $type, @args];
208 $CB{$id} = $cb; 294 $CB{$id} = $cb;
209 295
210 $fh_w_watcher->start; 296 $fh_w_watcher->start;
211 $SYNC->again unless $SYNC->is_active;
212}
213
214sub do_sync {
215 $DB_ENV->txn_checkpoint (0, 0, 0);
216 ()
217}
218
219sub do_exists {
220 my ($db, $key) = @_;
221
222 utf8::downgrade $key;
223 my $data;
224 (table $db)->db_get ($key, $data) == 0
225 ? length $data
226 : ()
227}
228
229sub do_get {
230 my ($db, $key) = @_;
231
232 utf8::downgrade $key;
233 my $data;
234 (table $db)->db_get ($key, $data) == 0
235 ? $data
236 : ()
237}
238
239sub do_put {
240 my ($db, $key, $data) = @_;
241
242 utf8::downgrade $key;
243 utf8::downgrade $data;
244 (table $db)->db_put ($key => $data)
245}
246
247sub do_table {
248 my ($db) = @_;
249
250 $db = table $db;
251
252 my $cursor = $db->db_cursor;
253 my %kv;
254 my ($k, $v);
255 $kv{$k} = $v while $cursor->c_get ($k, $v, BerkeleyDB::DB_NEXT) == 0;
256
257 \%kv
258}
259
260sub do_get_tile_id {
261 my ($name) = @_;
262
263 my $id;
264 my $table = table "facemap";
265
266 return $id
267 if $table->db_get ($name, $id) == 0;
268
269 for (1..100) {
270 my $txn = $DB_ENV->txn_begin;
271 my $status = $table->db_get (id => $id);
272 if ($status == 0 || $status == BerkeleyDB::DB_NOTFOUND) {
273 $id = ($id || 64) + 1;
274 if ($table->db_put (id => $id) == 0
275 && $table->db_put ($name => $id) == 0) {
276 $txn->txn_commit;
277
278 return $id;
279 }
280 }
281 $txn->txn_abort;
282 select undef, undef, undef, 0.01 * rand;
283 }
284
285 die "maximum number of transaction retries reached - database problems?";
286} 297}
287 298
288sub do_unlink { 299sub do_unlink {
289 unlink $_[0]; 300 unlink $_[0];
290} 301}
… …
345 356
346 print { $LOG_FH{$path} } "$ts $line\n" 357 print { $LOG_FH{$path} } "$ts $line\n"
347} 358}
348 359
349sub run { 360sub run {
350 ($FH, my $fh) = CFPlus::socketpipe; 361 ($FH, my $fh) = AnyEvent::Util::portable_socketpair
362 or die "unable to create database socketpair: $!";
351 363
352 my $oldfh = select $FH; $| = 1; select $oldfh; 364 my $oldfh = select $FH; $| = 1; select $oldfh;
353 my $oldfh = select $fh; $| = 1; select $oldfh; 365 my $oldfh = select $fh; $| = 1; select $oldfh;
354 366
355 my $pid = fork; 367 my $pid = fork;
356 368
357 if (defined $pid && !$pid) { 369 if (defined $pid && !$pid) {
358 local $SIG{QUIT}; 370 local $SIG{QUIT} = "IGNORE";
359 local $SIG{__DIE__}; 371 local $SIG{__DIE__};
360 local $SIG{__WARN__}; 372 local $SIG{__WARN__};
361 eval { 373 eval {
362 close $FH; 374 close $FH;
363
364 unless (eval { open_db }) {
365 eval { File::Path::rmtree $DB_HOME };
366 open_db;
367 }
368 375
369 while () { 376 while () {
370 4 == read $fh, my $len, 4 377 4 == read $fh, my $len, 4
371 or last; 378 or last;
372 $len = unpack "N", $len; 379 $len = unpack "N", $len;
… …
374 or die "unexpected eof while reading request"; 381 or die "unexpected eof while reading request";
375 382
376 $req = Storable::thaw $req; 383 $req = Storable::thaw $req;
377 384
378 my ($id, $type, @args) = @$req; 385 my ($id, $type, @args) = @$req;
379 my $cb = CFPlus::DB::Server->can ("do_$type") 386 my $cb = DC::DB::Server->can ("do_$type")
380 or die "$type: unknown database request type\n"; 387 or die "$type: unknown database request type\n";
381 my $res = pack "N/a*", Storable::freeze [$id, $cb->(@args)]; 388 my $res = pack "N/a*", Storable::freeze [$id, $cb->(@args)];
382 (syswrite $fh, $res) == length $res 389 (syswrite $fh, $res) == length $res
383 or die "DB::write: $!"; 390 or die "DB::write: $!";
384 } 391 }
385 }; 392 };
386 393
387 my $error = $@; 394 my $error = $@;
388 395
389 eval { 396 eval {
390 $DB_ENV->txn_checkpoint (0, 0, 0);
391
392 undef %DB_TABLE;
393 undef $DB_ENV;
394
395 Storable::store_fd [die => $error], $fh; 397 Storable::store_fd [die => $error], $fh;
396 }; 398 };
397 399
400 warn $error
401 if $error;
402
398 CFPlus::_exit 0; 403 DC::_exit 0;
399 } 404 }
400 405
401 close $fh; 406 close $fh;
402 CFPlus::fh_nonblocking $FH, 1; 407 DC::fh_nonblocking $FH, 1;
403 408
404 $CB{die} = sub { die shift }; 409 $CB{die} = sub { die shift };
405 410
406 $fh_r_watcher = EV::io $FH, EV::READ , \&fh_read; 411 $fh_r_watcher = EV::io $FH, EV::READ , \&fh_read;
407 $fh_w_watcher = EV::io $FH, EV::WRITE, \&fh_write; 412 $fh_w_watcher = EV::io $FH, EV::WRITE, \&fh_write;
408 $SYNC->again unless $SYNC->is_active;
409} 413}
410 414
411sub stop { 415sub stop {
412 close $FH; 416 close $FH;
413} 417}
414 418
419package DC::DB;
420
421sub nuke_db {
422 File::Path::mkpath [$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
4151; 4621;
416 463
417=back 464=back
418 465
419=head1 AUTHOR 466=head1 AUTHOR

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