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Comparing deliantra/Deliantra-Client/DC/DB.pm (file contents):
Revision 1.22 by root, Tue Nov 13 02:47:30 2007 UTC vs.
Revision 1.39 by root, Tue Sep 2 04:38:23 2008 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 ();
22use Config; 23use Config;
24use BDB;
23 25
24use CFPlus; 26use DC;
25 27
26our $DB_HOME = "$Crossfire::VARDIR/cfplus-$BerkeleyDB::db_version-$Config{archname}"; 28our $ODBDIR = "cfplus-" . BDB::VERSION_MAJOR . "." . BDB::VERSION_MINOR . "-$Config{archname}";
29our $DBDIR = "client-" . BDB::VERSION_MAJOR . "." . BDB::VERSION_MINOR . "-$Config{archname}";
30our $DB_HOME = "$Deliantra::VARDIR/$DBDIR";
31
32unless (-d $DB_HOME) {
33 if (-d "$Deliantra::VARDIR/$ODBDIR") {
34 rename "$Deliantra::VARDIR/$ODBDIR", $DB_HOME;
35 print STDERR "INFO: moved old database from $Deliantra::VARDIR/$ODBDIR to $DB_HOME\n";
36 } elsif (-d "$Deliantra::OLDDIR/$ODBDIR") {
37 rename "$Deliantra::OLDDIR/$DBDIR", $DB_HOME;
38 print STDERR "INFO: moved old database from $Deliantra::OLDDIR/$ODBDIR to $DB_HOME\n";
39 } else {
40 File::Path::mkpath [$DB_HOME]
41 or die "unable to create database directory $DB_HOME: $!";
42 }
43}
44
45BDB::max_poll_time 0.03;
46BDB::max_parallel 1;
47
48our $DB_ENV;
49our $DB_STATE;
50our %DB_TABLE;
51our $TILE_SEQ;
52
53sub try_open_db {
54 File::Path::mkpath [$DB_HOME];
55
56 my $env = db_env_create;
57
58 $env->set_errfile (\*STDERR);
59 $env->set_msgfile (\*STDERR);
60 $env->set_verbose (-1, 1);
61
62 $env->set_flags (BDB::AUTO_COMMIT | BDB::REGION_INIT);
63 $env->set_flags (&BDB::LOG_AUTOREMOVE ) if BDB::VERSION v0, v4.7;
64 $env->log_set_config (&BDB::LOG_AUTO_REMOVE) if BDB::VERSION v4.7;
65
66 $env->set_timeout (3, BDB::SET_TXN_TIMEOUT);
67 $env->set_timeout (3, BDB::SET_LOCK_TIMEOUT);
68
69 $env->set_cachesize (0, 2048 * 1024, 0);
70
71 db_env_open $env, $DB_HOME,
72 BDB::CREATE | BDB::REGISTER | BDB::RECOVER | BDB::INIT_MPOOL | BDB::INIT_LOCK | BDB::INIT_TXN,
73 0666;
74
75 $! and die "cannot open database environment $DB_HOME: " . BDB::strerror;
76
77 $DB_ENV = $env;
78
79 1
80}
81
82sub table($) {
83 $DB_TABLE{$_[0]} ||= do {
84 my ($table) = @_;
85
86 $table =~ s/([^a-zA-Z0-9_\-])/sprintf "=%x=", ord $1/ge;
87
88 my $db = db_create $DB_ENV;
89 $db->set_flags (BDB::CHKSUM);
90
91 db_open $db, undef, $table, undef, BDB::BTREE,
92 BDB::AUTO_COMMIT | BDB::CREATE | BDB::READ_UNCOMMITTED, 0666;
93
94 $! and "unable to open/create database table $_[0]: ". BDB::strerror;
95
96 $db
97 }
98}
99
100#############################################################################
101
102our $WATCHER;
103our $SYNC;
104our $facemap;
105
106sub exists($$$) {
107 my ($db, $key, $cb) = @_;
108
109 my $data;
110 db_get table $db, undef, $key, $data, 0, sub {
111 $cb->($! ? () : length $data);
112 };
113}
114
115sub get($$$) {
116 my ($db, $key, $cb) = @_;
117
118 my $data;
119 db_get table $db, undef, $key, $data, 0, sub {
120 $cb->($! ? () : $data);
121 };
122}
123
124sub put($$$$) {
125 my ($db, $key, $data, $cb) = @_;
126
127 db_put table $db, undef, $key, $data, 0, sub {
128 $cb->($!);
129 $SYNC->again unless $SYNC->is_active;
130 };
131}
132
133sub do_table {
134 my ($db, $cb) = @_;
135
136 $db = table $db;
137
138 my $cursor = $db->cursor;
139 my %kv;
140
141 for (;;) {
142 db_c_get $cursor, my $k, my $v, BDB::NEXT;
143 last if $!;
144 $kv{$k} = $v;
145 }
146
147 $cb->(\%kv);
148}
149
150sub do_get_tile_id {
151 my ($name, $cb) = @_;
152
153 my $table = table "facemap";
154 my $id;
155
156 db_get $table, undef, $name => $id, 0;
157 $! or return $cb->($id);
158
159 unless ($TILE_SEQ) {
160 $TILE_SEQ = $table->sequence;
161 $TILE_SEQ->initial_value (64);
162 $TILE_SEQ->set_cachesize (0);
163 db_sequence_open $TILE_SEQ, undef, "id", BDB::CREATE;
164 }
165
166 db_sequence_get $TILE_SEQ, undef, 1, my $id;
167
168 die "unable to allocate tile id: $!"
169 if $!;
170
171 db_put $table, undef, $name => $id, 0;
172 $cb->($id);
173
174}
175
176sub get_tile_id_sync($) {
177 my ($name) = @_;
178
179 $facemap->{$name} ||= do {
180 my $id;
181 do_get_tile_id $name, sub {
182 $id = $_[0];
183 };
184 BDB::flush;
185 $id
186 }
187}
188
189#############################################################################
27 190
28sub path_of_res($) { 191sub path_of_res($) {
29 utf8::downgrade $_[0]; # bug in unpack "H*" 192 utf8::downgrade $_[0]; # bug in unpack "H*"
30 "$DB_HOME/res-data-" . unpack "H*", $_[0] 193 "$DB_HOME/res-data-" . unpack "H*", $_[0]
31} 194}
32 195
33sub sync { 196sub sync {
34 # for debugging 197 # for debugging
35 #CFPlus::DB::Server::req (sync => sub { }); 198 #DC::DB::Server::req (sync => sub { });
36 CFPlus::DB::Server::sync (); 199 DC::DB::Server::sync ();
37}
38
39sub exists($$$) {
40 CFPlus::DB::Server::req (exists => @_);
41}
42
43sub get($$$) {
44 CFPlus::DB::Server::req (get => @_);
45}
46
47sub put($$$$) {
48 CFPlus::DB::Server::req (put => @_);
49} 200}
50 201
51sub unlink($$) { 202sub unlink($$) {
52 CFPlus::DB::Server::req (unlink => @_); 203 DC::DB::Server::req (unlink => @_);
53} 204}
54 205
55sub read_file($$) { 206sub read_file($$) {
56 CFPlus::DB::Server::req (read_file => @_); 207 DC::DB::Server::req (read_file => @_);
57} 208}
58 209
59sub write_file($$$) { 210sub write_file($$$) {
60 CFPlus::DB::Server::req (write_file => @_); 211 DC::DB::Server::req (write_file => @_);
61} 212}
62 213
63sub prefetch_file($$$) { 214sub prefetch_file($$$) {
64 CFPlus::DB::Server::req (prefetch_file => @_); 215 DC::DB::Server::req (prefetch_file => @_);
65} 216}
66 217
67sub logprint($$$) { 218sub logprint($$$) {
68 CFPlus::DB::Server::req (logprint => @_); 219 DC::DB::Server::req (logprint => @_);
69} 220}
70 221
71our $tilemap; 222#############################################################################
72 223
73sub get_tile_id_sync($) {
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; 224package DC::DB::Server;
99 225
100use strict; 226use strict;
101 227
228use EV ();
102use Fcntl; 229use Fcntl;
103use BerkeleyDB;
104
105our $DB_ENV;
106our $DB_STATE;
107our %DB_TABLE;
108
109sub open_db {
110 mkdir $DB_HOME, 0777;
111 my $recover = $BerkeleyDB::db_version >= 4.4
112 ? eval "DB_REGISTER | DB_RECOVER"
113 : 0;
114
115 $DB_ENV = new BerkeleyDB::Env
116 -Home => $DB_HOME,
117 -Cachesize => 8_000_000,
118 -ErrFile => "$DB_HOME/errorlog.txt",
119# -ErrPrefix => "DATABASE",
120 -Verbose => 1,
121 -Flags => DB_CREATE | DB_RECOVER | DB_INIT_MPOOL | DB_INIT_LOCK | DB_INIT_TXN | $recover,
122 -SetFlags => DB_AUTO_COMMIT | DB_LOG_AUTOREMOVE | DB_TXN_WRITE_NOSYNC,
123 or die "unable to create/open database home $DB_HOME: $BerkeleyDB::Error";
124
125 1
126}
127
128sub table($) {
129 $DB_TABLE{$_[0]} ||= do {
130 my ($table) = @_;
131
132 $table =~ s/([^a-zA-Z0-9_\-])/sprintf "=%x=", ord $1/ge;
133
134 new BerkeleyDB::Btree
135 -Env => $DB_ENV,
136 -Filename => $table,
137# -Filename => "database",
138# -Subname => $table,
139 -Property => DB_CHKSUM,
140 -Flags => DB_AUTO_COMMIT | DB_CREATE | DB_UPGRADE,
141 or die "unable to create/open database table $_[0]: $BerkeleyDB::Error"
142 }
143}
144 230
145our %CB; 231our %CB;
146our $FH; 232our $FH;
147our $ID = "aaa0"; 233our $ID = "aaa0";
148our ($fh_r_watcher, $fh_w_watcher); 234our ($fh_r_watcher, $fh_w_watcher);
149our $sync_timer; 235our $sync_timer;
150our $write_buf; 236our $write_buf;
151our $read_buf; 237our $read_buf;
152 238
153our $SYNC = EV::timer_ns 0, 60, sub {
154 $_[0]->stop;
155 CFPlus::DB::Server::req (sync => sub { });
156};
157
158sub fh_write { 239sub fh_write {
159 my $len = syswrite $FH, $write_buf; 240 my $len = syswrite $FH, $write_buf;
160 241
161 substr $write_buf, 0, $len, ""; 242 substr $write_buf, 0, $len, "";
162 243
… …
205 my $id = ++$ID; 286 my $id = ++$ID;
206 $write_buf .= pack "N/a*", Storable::freeze [$id, $type, @args]; 287 $write_buf .= pack "N/a*", Storable::freeze [$id, $type, @args];
207 $CB{$id} = $cb; 288 $CB{$id} = $cb;
208 289
209 $fh_w_watcher->start; 290 $fh_w_watcher->start;
210 $SYNC->again unless $SYNC->is_active;
211}
212
213sub do_sync {
214 $DB_ENV->txn_checkpoint (0, 0, 0);
215 ()
216}
217
218sub do_exists {
219 my ($db, $key) = @_;
220
221 utf8::downgrade $key;
222 my $data;
223 (table $db)->db_get ($key, $data) == 0
224 ? length $data
225 : ()
226}
227
228sub do_get {
229 my ($db, $key) = @_;
230
231 utf8::downgrade $key;
232 my $data;
233 (table $db)->db_get ($key, $data) == 0
234 ? $data
235 : ()
236}
237
238sub do_put {
239 my ($db, $key, $data) = @_;
240
241 utf8::downgrade $key;
242 utf8::downgrade $data;
243 (table $db)->db_put ($key => $data)
244}
245
246sub do_table {
247 my ($db) = @_;
248
249 $db = table $db;
250
251 my $cursor = $db->db_cursor;
252 my %kv;
253 my ($k, $v);
254 $kv{$k} = $v while $cursor->c_get ($k, $v, BerkeleyDB::DB_NEXT) == 0;
255
256 \%kv
257}
258
259sub do_get_tile_id {
260 my ($name) = @_;
261
262 my $id;
263 my $table = table "facemap";
264
265 return $id
266 if $table->db_get ($name, $id) == 0;
267
268 for (1..100) {
269 my $txn = $DB_ENV->txn_begin;
270 my $status = $table->db_get (id => $id);
271 if ($status == 0 || $status == BerkeleyDB::DB_NOTFOUND) {
272 $id = ($id || 64) + 1;
273 if ($table->db_put (id => $id) == 0
274 && $table->db_put ($name => $id) == 0) {
275 $txn->txn_commit;
276
277 return $id;
278 }
279 }
280 $txn->txn_abort;
281 select undef, undef, undef, 0.01 * rand;
282 }
283
284 die "maximum number of transaction retries reached - database problems?";
285} 291}
286 292
287sub do_unlink { 293sub do_unlink {
288 unlink $_[0]; 294 unlink $_[0];
289} 295}
… …
344 350
345 print { $LOG_FH{$path} } "$ts $line\n" 351 print { $LOG_FH{$path} } "$ts $line\n"
346} 352}
347 353
348sub run { 354sub run {
349 ($FH, my $fh) = CFPlus::socketpipe; 355 ($FH, my $fh) = DC::socketpipe;
350 356
351 my $oldfh = select $FH; $| = 1; select $oldfh; 357 my $oldfh = select $FH; $| = 1; select $oldfh;
352 my $oldfh = select $fh; $| = 1; select $oldfh; 358 my $oldfh = select $fh; $| = 1; select $oldfh;
353 359
354 my $pid = fork; 360 my $pid = fork;
355 361
356 if (defined $pid && !$pid) { 362 if (defined $pid && !$pid) {
357 local $SIG{QUIT}; 363 local $SIG{QUIT} = "IGNORE";
358 local $SIG{__DIE__}; 364 local $SIG{__DIE__};
359 local $SIG{__WARN__}; 365 local $SIG{__WARN__};
360 eval { 366 eval {
361 close $FH; 367 close $FH;
362
363 unless (eval { open_db }) {
364 eval { File::Path::rmtree $DB_HOME };
365 open_db;
366 }
367 368
368 while () { 369 while () {
369 4 == read $fh, my $len, 4 370 4 == read $fh, my $len, 4
370 or last; 371 or last;
371 $len = unpack "N", $len; 372 $len = unpack "N", $len;
… …
373 or die "unexpected eof while reading request"; 374 or die "unexpected eof while reading request";
374 375
375 $req = Storable::thaw $req; 376 $req = Storable::thaw $req;
376 377
377 my ($id, $type, @args) = @$req; 378 my ($id, $type, @args) = @$req;
378 my $cb = CFPlus::DB::Server->can ("do_$type") 379 my $cb = DC::DB::Server->can ("do_$type")
379 or die "$type: unknown database request type\n"; 380 or die "$type: unknown database request type\n";
380 my $res = pack "N/a*", Storable::freeze [$id, $cb->(@args)]; 381 my $res = pack "N/a*", Storable::freeze [$id, $cb->(@args)];
381 (syswrite $fh, $res) == length $res 382 (syswrite $fh, $res) == length $res
382 or die "DB::write: $!"; 383 or die "DB::write: $!";
383 } 384 }
384 }; 385 };
385 386
386 my $error = $@; 387 my $error = $@;
387 388
388 eval { 389 eval {
389 $DB_ENV->txn_checkpoint (0, 0, 0);
390
391 undef %DB_TABLE;
392 undef $DB_ENV;
393
394 Storable::store_fd [die => $error], $fh; 390 Storable::store_fd [die => $error], $fh;
395 }; 391 };
396 392
393 warn $error
394 if $error;
395
397 CFPlus::_exit 0; 396 DC::_exit 0;
398 } 397 }
399 398
400 close $fh; 399 close $fh;
401 CFPlus::fh_nonblocking $FH, 1; 400 DC::fh_nonblocking $FH, 1;
402 401
403 $CB{die} = sub { die shift }; 402 $CB{die} = sub { die shift };
404 403
405 $fh_r_watcher = EV::io $FH, EV::READ , \&fh_read; 404 $fh_r_watcher = EV::io $FH, EV::READ , \&fh_read;
406 $fh_w_watcher = EV::io $FH, EV::WRITE, \&fh_write; 405 $fh_w_watcher = EV::io $FH, EV::WRITE, \&fh_write;
407 $SYNC->again unless $SYNC->is_active;
408} 406}
409 407
410sub stop { 408sub stop {
411 close $FH; 409 close $FH;
412} 410}
413 411
412package DC::DB;
413
414sub nuke_db {
415 File::Path::mkpath [$DB_HOME];
416 eval { File::Path::rmtree $DB_HOME };
417}
418
419sub open_db {
420 unless (eval { try_open_db }) {
421 warn "$@";#d#
422 eval { nuke_db };
423 try_open_db;
424 }
425
426 # fetch the full face table first
427 unless ($facemap) {
428 do_table facemap => sub {
429 $facemap = $_[0];
430 delete $facemap->{id};
431 my %maptile = reverse %$facemap;#d#
432 if ((scalar keys %$facemap) != (scalar keys %maptile)) {#d#
433 $facemap = { };#d#
434 DC::error "FATAL: facemap is not a 1:1 mapping, please report this and delete your $DB_HOME directory!\n";#d#
435 }#d#
436 };
437 }
438
439 $WATCHER = EV::io BDB::poll_fileno, EV::READ, \&BDB::poll_cb;
440 $SYNC = EV::timer_ns 0, 60, sub {
441 $_[0]->stop;
442 db_env_txn_checkpoint $DB_ENV, 0, 0, 0, sub { };
443 };
444}
445
446END {
447 db_env_txn_checkpoint $DB_ENV, 0, 0, 0
448 if $DB_ENV;
449
450 undef $TILE_SEQ;
451 %DB_TABLE = ();
452 undef $DB_ENV;
453}
454
4141; 4551;
415 456
416=back 457=back
417 458
418=head1 AUTHOR 459=head1 AUTHOR

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