ViewVC Help
View File | Revision Log | Show Annotations | Download File
/cvs/deliantra/Deliantra-Client/DC/DB.pm
(Generate patch)

Comparing deliantra/Deliantra-Client/DC/DB.pm (file contents):
Revision 1.21 by root, Mon Nov 12 23:25:37 2007 UTC vs.
Revision 1.41 by root, Wed Dec 24 04:09:27 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
32sub FIRST_TILE_ID () { 64 }
33
34unless (-d $DB_HOME) {
35 if (-d "$Deliantra::VARDIR/$ODBDIR") {
36 rename "$Deliantra::VARDIR/$ODBDIR", $DB_HOME;
37 print STDERR "INFO: moved old database from $Deliantra::VARDIR/$ODBDIR to $DB_HOME\n";
38 } elsif (-d "$Deliantra::OLDDIR/$ODBDIR") {
39 rename "$Deliantra::OLDDIR/$DBDIR", $DB_HOME;
40 print STDERR "INFO: moved old database from $Deliantra::OLDDIR/$ODBDIR to $DB_HOME\n";
41 } else {
42 File::Path::mkpath [$DB_HOME]
43 or die "unable to create database directory $DB_HOME: $!";
44 }
45}
46
47BDB::max_poll_time 0.03;
48BDB::max_parallel 1;
49
50our $DB_ENV;
51our $DB_STATE;
52our %DB_TABLE;
53our $TILE_SEQ;
54
55sub try_open_db {
56 File::Path::mkpath [$DB_HOME];
57
58 my $env = db_env_create;
59
60 $env->set_errfile (\*STDERR);
61 $env->set_msgfile (\*STDERR);
62 $env->set_verbose (-1, 1);
63
64 $env->set_flags (BDB::AUTO_COMMIT | BDB::REGION_INIT);
65 $env->set_flags (&BDB::LOG_AUTOREMOVE ) if BDB::VERSION v0, v4.7;
66 $env->log_set_config (&BDB::LOG_AUTO_REMOVE) if BDB::VERSION v4.7;
67
68 $env->set_timeout (3, BDB::SET_TXN_TIMEOUT);
69 $env->set_timeout (3, BDB::SET_LOCK_TIMEOUT);
70
71 $env->set_cachesize (0, 2048 * 1024, 0);
72
73 db_env_open $env, $DB_HOME,
74 BDB::CREATE | BDB::REGISTER | BDB::RECOVER | BDB::INIT_MPOOL | BDB::INIT_LOCK | BDB::INIT_TXN,
75 0666;
76
77 $! and die "cannot open database environment $DB_HOME: " . BDB::strerror;
78
79 $DB_ENV = $env;
80
81 1
82}
83
84sub table($) {
85 $DB_TABLE{$_[0]} ||= do {
86 my ($table) = @_;
87
88 $table =~ s/([^a-zA-Z0-9_\-])/sprintf "=%x=", ord $1/ge;
89
90 $DB_ENV#d#
91 or return ::clienterror ("trying to create table $_[0] with empty db_env $DB_ENV" => 1);#d#
92
93 my $db = db_create $DB_ENV;
94 $db->set_flags (BDB::CHKSUM);
95
96 db_open $db, undef, $table, undef, BDB::BTREE,
97 BDB::AUTO_COMMIT | BDB::CREATE | BDB::READ_UNCOMMITTED, 0666;
98
99 $! and "unable to open/create database table $_[0]: ". BDB::strerror;
100
101 $db
102 }
103}
104
105#############################################################################
106
107our $WATCHER;
108our $SYNC;
109our $facemap;
110
111sub exists($$$) {
112 my ($db, $key, $cb) = @_;
113
114 my $data;
115 db_get table $db, undef, $key, $data, 0, sub {
116 $cb->($! ? () : length $data);
117 };
118}
119
120sub get($$$) {
121 my ($db, $key, $cb) = @_;
122
123 my $data;
124 db_get table $db, undef, $key, $data, 0, sub {
125 $cb->($! ? () : $data);
126 };
127}
128
129sub put($$$$) {
130 my ($db, $key, $data, $cb) = @_;
131
132 db_put table $db, undef, $key, $data, 0, sub {
133 $cb->($!);
134 $SYNC->again unless $SYNC->is_active;
135 };
136}
137
138sub do_table {
139 my ($db, $cb) = @_;
140
141 $db = table $db;
142
143 my $cursor = $db->cursor;
144 my %kv;
145
146 for (;;) {
147 db_c_get $cursor, my $k, my $v, BDB::NEXT;
148 last if $!;
149 $kv{$k} = $v;
150 }
151
152 $cb->(\%kv);
153}
154
155sub do_get_tile_id {
156 my ($name, $cb) = @_;
157
158 my $table = table "facemap";
159 my $id;
160
161 db_get $table, undef, $name => $id, 0;
162 $! or return $cb->($id);
163
164 unless ($TILE_SEQ) {
165 $TILE_SEQ = $table->sequence;
166 $TILE_SEQ->initial_value (FIRST_TILE_ID);
167 $TILE_SEQ->set_cachesize (0);
168 db_sequence_open $TILE_SEQ, undef, "id", BDB::CREATE;
169 }
170
171 db_sequence_get $TILE_SEQ, undef, 1, my $id;
172
173 die "unable to allocate tile id: $!"
174 if $!;
175
176 db_put $table, undef, $name => $id, 0;
177 $cb->($id);
178
179}
180
181sub get_tile_id_sync($) {
182 my ($name) = @_;
183
184 $facemap->{$name} ||= do {
185 my $id;
186 do_get_tile_id $name, sub {
187 $id = $_[0];
188 };
189 BDB::flush;
190 $id
191 }
192}
193
194#############################################################################
27 195
28sub path_of_res($) { 196sub path_of_res($) {
29 utf8::downgrade $_[0]; # bug in unpack "H*" 197 utf8::downgrade $_[0]; # bug in unpack "H*"
30 "$DB_HOME/res-data-" . unpack "H*", $_[0] 198 "$DB_HOME/res-data-" . unpack "H*", $_[0]
31} 199}
32 200
33sub sync { 201sub sync {
34 # for debugging 202 # for debugging
35 #CFPlus::DB::Server::req (sync => sub { }); 203 #DC::DB::Server::req (sync => sub { });
36 CFPlus::DB::Server::sync (); 204 DC::DB::Server::sync ();
37}
38
39sub exists($$$) {
40 CFPlus::DB::Server::req (exists => @_);
41}
42
43sub get($$$) {
44 CFPlus::DB::Server::req (get => @_);
45}
46
47sub put($$$$) {
48 CFPlus::DB::Server::req (put => @_);
49} 205}
50 206
51sub unlink($$) { 207sub unlink($$) {
52 CFPlus::DB::Server::req (unlink => @_); 208 DC::DB::Server::req (unlink => @_);
53} 209}
54 210
55sub read_file($$) { 211sub read_file($$) {
56 CFPlus::DB::Server::req (read_file => @_); 212 DC::DB::Server::req (read_file => @_);
57} 213}
58 214
59sub write_file($$$) { 215sub write_file($$$) {
60 CFPlus::DB::Server::req (write_file => @_); 216 DC::DB::Server::req (write_file => @_);
61} 217}
62 218
63sub prefetch_file($$$) { 219sub prefetch_file($$$) {
64 CFPlus::DB::Server::req (prefetch_file => @_); 220 DC::DB::Server::req (prefetch_file => @_);
65} 221}
66 222
67sub logprint($$$) { 223sub logprint($$$) {
68 CFPlus::DB::Server::req (logprint => @_); 224 DC::DB::Server::req (logprint => @_);
69} 225}
70 226
71our $tilemap; 227#############################################################################
72 228
73sub get_tile_id_sync($) {
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; 229package DC::DB::Server;
99 230
100use strict; 231use strict;
101 232
233use EV ();
102use Fcntl; 234use 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}
144 235
145our %CB; 236our %CB;
146our $FH; 237our $FH;
147our $ID = "aaa0"; 238our $ID = "aaa0";
148our ($fh_r_watcher, $fh_w_watcher); 239our ($fh_r_watcher, $fh_w_watcher);
149our $sync_timer; 240our $sync_timer;
150our $write_buf; 241our $write_buf;
151our $read_buf; 242our $read_buf;
152 243
153our $SYNC = EV::timer_ns 0, 60, sub {
154 $_[0]->stop;
155 CFPlus::DB::Server::req (sync => sub { });
156};
157
158sub fh_write { 244sub fh_write {
159 my $len = syswrite $FH, $write_buf; 245 my $len = syswrite $FH, $write_buf;
160 246
161 substr $write_buf, 0, $len, ""; 247 substr $write_buf, 0, $len, "";
162 248
… …
205 my $id = ++$ID; 291 my $id = ++$ID;
206 $write_buf .= pack "N/a*", Storable::freeze [$id, $type, @args]; 292 $write_buf .= pack "N/a*", Storable::freeze [$id, $type, @args];
207 $CB{$id} = $cb; 293 $CB{$id} = $cb;
208 294
209 $fh_w_watcher->start; 295 $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} 296}
286 297
287sub do_unlink { 298sub do_unlink {
288 unlink $_[0]; 299 unlink $_[0];
289} 300}
… …
344 355
345 print { $LOG_FH{$path} } "$ts $line\n" 356 print { $LOG_FH{$path} } "$ts $line\n"
346} 357}
347 358
348sub run { 359sub run {
349 ($FH, my $fh) = CFPlus::socketpipe; 360 ($FH, my $fh) = DC::socketpipe;
350 361
351 my $oldfh = select $FH; $| = 1; select $oldfh; 362 my $oldfh = select $FH; $| = 1; select $oldfh;
352 my $oldfh = select $fh; $| = 1; select $oldfh; 363 my $oldfh = select $fh; $| = 1; select $oldfh;
353 364
354 my $pid = fork; 365 my $pid = fork;
355 366
356 if (defined $pid && !$pid) { 367 if (defined $pid && !$pid) {
357 local $SIG{QUIT}; 368 local $SIG{QUIT} = "IGNORE";
358 local $SIG{__DIE__}; 369 local $SIG{__DIE__};
359 local $SIG{__WARN__}; 370 local $SIG{__WARN__};
360 eval { 371 eval {
361 close $FH; 372 close $FH;
362
363 unless (eval { open_db }) {
364 eval { File::Path::rmtree $DB_HOME };
365 open_db;
366 }
367 373
368 while () { 374 while () {
369 4 == read $fh, my $len, 4 375 4 == read $fh, my $len, 4
370 or last; 376 or last;
371 $len = unpack "N", $len; 377 $len = unpack "N", $len;
… …
373 or die "unexpected eof while reading request"; 379 or die "unexpected eof while reading request";
374 380
375 $req = Storable::thaw $req; 381 $req = Storable::thaw $req;
376 382
377 my ($id, $type, @args) = @$req; 383 my ($id, $type, @args) = @$req;
378 my $cb = CFPlus::DB::Server->can ("do_$type") 384 my $cb = DC::DB::Server->can ("do_$type")
379 or die "$type: unknown database request type\n"; 385 or die "$type: unknown database request type\n";
380 my $res = pack "N/a*", Storable::freeze [$id, $cb->(@args)]; 386 my $res = pack "N/a*", Storable::freeze [$id, $cb->(@args)];
381 (syswrite $fh, $res) == length $res 387 (syswrite $fh, $res) == length $res
382 or die "DB::write: $!"; 388 or die "DB::write: $!";
383 } 389 }
384 }; 390 };
385 391
386 my $error = $@; 392 my $error = $@;
387 393
388 eval { 394 eval {
389 undef %DB_TABLE;
390 undef $DB_ENV;
391
392 Storable::store_fd [die => $error], $fh; 395 Storable::store_fd [die => $error], $fh;
393 }; 396 };
394 397
395 $DB_ENV->txn_checkpoint (0, 0, 0); 398 warn $error
399 if $error;
400
396 CFPlus::_exit 0; 401 DC::_exit 0;
397 } 402 }
398 403
399 close $fh; 404 close $fh;
400 CFPlus::fh_nonblocking $FH, 1; 405 DC::fh_nonblocking $FH, 1;
401 406
402 $CB{die} = sub { die shift }; 407 $CB{die} = sub { die shift };
403 408
404 $fh_r_watcher = EV::io $FH, EV::READ , \&fh_read; 409 $fh_r_watcher = EV::io $FH, EV::READ , \&fh_read;
405 $fh_w_watcher = EV::io $FH, EV::WRITE, \&fh_write; 410 $fh_w_watcher = EV::io $FH, EV::WRITE, \&fh_write;
406 $SYNC->again unless $SYNC->is_active;
407} 411}
408 412
409sub stop { 413sub stop {
410 close $FH; 414 close $FH;
411} 415}
412 416
417package DC::DB;
418
419sub nuke_db {
420 File::Path::mkpath [$DB_HOME];
421 eval { File::Path::rmtree $DB_HOME };
422}
423
424sub open_db {
425 unless (eval { try_open_db }) {
426 warn "$@";#d#
427 eval { nuke_db };
428 try_open_db;
429 }
430
431 # fetch the full face table first
432 unless ($facemap) {
433 do_table facemap => sub {
434 $facemap = $_[0];
435 delete $facemap->{id};
436 my %maptile = reverse %$facemap;#d#
437 if ((scalar keys %$facemap) != (scalar keys %maptile)) {#d#
438 $facemap = { };#d#
439 DC::error "FATAL: facemap is not a 1:1 mapping, please report this and delete your $DB_HOME directory!\n";#d#
440 }#d#
441 };
442 }
443
444 $WATCHER = EV::io BDB::poll_fileno, EV::READ, \&BDB::poll_cb;
445 $SYNC = EV::timer_ns 0, 60, sub {
446 $_[0]->stop;
447 db_env_txn_checkpoint $DB_ENV, 0, 0, 0, sub { };
448 };
449}
450
451END {
452 db_env_txn_checkpoint $DB_ENV, 0, 0, 0
453 if $DB_ENV;
454
455 undef $TILE_SEQ;
456 %DB_TABLE = ();
457 undef $DB_ENV;
458}
459
4131; 4601;
414 461
415=back 462=back
416 463
417=head1 AUTHOR 464=head1 AUTHOR

Diff Legend

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