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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 1.34 by root, Sun Mar 30 04:59:42 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 Carp (); 20use Carp ();
21use Storable (); 21use Storable ();
22use Config; 22use Config;
23use BDB;
23 24
24use CFPlus; 25use DC;
25 26
26our $DB_HOME = "$Crossfire::VARDIR/cfplus-$BerkeleyDB::db_version-$Config{archname}"; 27our $ODBDIR = "cfplus-" . BDB::VERSION . "-$Config{archname}";
28our $DBDIR = "client-" . BDB::VERSION . "-$Config{archname}";
29our $DB_HOME = "$Deliantra::VARDIR/$DBDIR";
30
31if (!-e $DB_HOME and -e "$Deliantra::VARDIR/$ODBDIR") {
32 rename "$Deliantra::VARDIR/$ODBDIR", $DB_HOME;
33 print STDERR "INFO: moved old database from $Deliantra::VARDIR/$ODBDIR to $DB_HOME\n";
34}
35
36if (!-e $DB_HOME and -e "$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}
40
41BDB::max_poll_time 0.03;
42BDB::max_parallel 1;
43
44our $DB_ENV;
45our $DB_STATE;
46our %DB_TABLE;
47
48sub try_open_db {
49 mkdir $DB_HOME, 0777;
50
51 $DB_ENV = db_env_create;
52
53 $DB_ENV->set_errfile (\*STDERR);
54 $DB_ENV->set_msgfile (\*STDERR);
55 $DB_ENV->set_verbose (-1, 1);
56
57 $DB_ENV->set_flags (BDB::AUTO_COMMIT | BDB::LOG_AUTOREMOVE | BDB::TXN_WRITE_NOSYNC);
58 $DB_ENV->set_cachesize (0, 2048 * 1024, 0);
59
60 db_env_open $DB_ENV, $DB_HOME,
61 BDB::CREATE | BDB::REGISTER | BDB::RECOVER | BDB::INIT_MPOOL | BDB::INIT_LOCK | BDB::INIT_TXN,
62 0666;
63
64 $! and die "cannot open database environment $DB_HOME: " . BDB::strerror;
65
66 1
67}
68
69sub table($) {
70 $DB_TABLE{$_[0]} ||= do {
71 my ($table) = @_;
72
73 $table =~ s/([^a-zA-Z0-9_\-])/sprintf "=%x=", ord $1/ge;
74
75 my $db = db_create $DB_ENV;
76 $db->set_flags (BDB::CHKSUM);
77
78 db_open $db, undef, $table, undef, BDB::BTREE,
79 BDB::AUTO_COMMIT | BDB::CREATE | BDB::READ_UNCOMMITTED, 0666;
80
81 $! and "unable to open/create database table $_[0]: ". BDB::strerror;
82
83 $db
84 }
85}
86
87#############################################################################
88
89our $WATCHER;
90our $SYNC;
91our $facemap;
92
93sub exists($$$) {
94 my ($db, $key, $cb) = @_;
95
96 my $data;
97 db_get table $db, undef, $key, $data, 0, sub {
98 $cb->($! ? () : length $data);
99 };
100}
101
102sub get($$$) {
103 my ($db, $key, $cb) = @_;
104
105 my $data;
106 db_get table $db, undef, $key, $data, 0, sub {
107 $cb->($! ? () : $data);
108 };
109}
110
111sub put($$$$) {
112 my ($db, $key, $data, $cb) = @_;
113 warn "put $key ",(length $data),"\n";#d#
114
115 db_put table $db, undef, $key, $data, 0, sub {
116 $cb->($!);
117 $SYNC->again unless $SYNC->is_active;
118 };
119}
120
121sub do_table {
122 my ($db, $cb) = @_;
123
124 $db = table $db;
125
126 my $cursor = $db->cursor;
127 my %kv;
128
129 for (;;) {
130 db_c_get $cursor, my $k, my $v, BDB::NEXT;
131 last if $!;
132 $kv{$k} = $v;
133 }
134
135 $cb->(\%kv);
136}
137
138sub do_get_tile_id {
139 my ($name, $cb) = @_;
140
141 my $table = table "facemap";
142 my $id;
143
144 db_get $table, undef, $name, $id, 0;
145 $! or return $cb->($id);
146
147 for (1..100) {
148 my $txn = $DB_ENV->txn_begin;
149 db_get $table, $txn, id => $id, 0;
150
151 $id = 64 if $id < 64;
152
153 ++$id;
154
155 db_put $table, $txn, id => $id, 0;
156 db_txn_finish $txn;
157
158 unless ($!) {
159 db_put $table, undef, $name => $id;
160 $SYNC->again unless $SYNC->is_active;
161 return $cb->($id);
162 }
163
164 select undef, undef, undef, 0.01 * rand;
165 }
166
167 die "maximum number of transaction retries reached - database problems?";
168}
169
170sub get_tile_id_sync($) {
171 my ($name) = @_;
172
173 $facemap->{$name} ||= do {
174 my $id;
175 do_get_tile_id $name, sub {
176 $id = $_[0];
177 };
178 BDB::flush;
179 $id
180 }
181}
182
183#############################################################################
27 184
28sub path_of_res($) { 185sub path_of_res($) {
29 utf8::downgrade $_[0]; # bug in unpack "H*" 186 utf8::downgrade $_[0]; # bug in unpack "H*"
30 "$DB_HOME/res-data-" . unpack "H*", $_[0] 187 "$DB_HOME/res-data-" . unpack "H*", $_[0]
31} 188}
32 189
33sub sync { 190sub sync {
34 # for debugging 191 # for debugging
35 #CFPlus::DB::Server::req (sync => sub { }); 192 #DC::DB::Server::req (sync => sub { });
36 CFPlus::DB::Server::sync (); 193 DC::DB::Server::sync ();
37}
38
39sub exists($$$) {
40 CFPlus::DB::Server::req (exists => @_);
41}
42
43sub get($$$) {
44 CFPlus::DB::Server::req (get => @_);
45}
46
47sub put($$$$) {
48 CFPlus::DB::Server::req (put => @_);
49} 194}
50 195
51sub unlink($$) { 196sub unlink($$) {
52 CFPlus::DB::Server::req (unlink => @_); 197 DC::DB::Server::req (unlink => @_);
53} 198}
54 199
55sub read_file($$) { 200sub read_file($$) {
56 CFPlus::DB::Server::req (read_file => @_); 201 DC::DB::Server::req (read_file => @_);
57} 202}
58 203
59sub write_file($$$) { 204sub write_file($$$) {
60 CFPlus::DB::Server::req (write_file => @_); 205 DC::DB::Server::req (write_file => @_);
61} 206}
62 207
63sub prefetch_file($$$) { 208sub prefetch_file($$$) {
64 CFPlus::DB::Server::req (prefetch_file => @_); 209 DC::DB::Server::req (prefetch_file => @_);
65} 210}
66 211
67sub logprint($$$) { 212sub logprint($$$) {
68 CFPlus::DB::Server::req (logprint => @_); 213 DC::DB::Server::req (logprint => @_);
69} 214}
70 215
71our $tilemap; 216#############################################################################
72 217
73sub get_tile_id_sync($) {
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; 218package DC::DB::Server;
99 219
100use strict; 220use strict;
101 221
102use EV (); 222use EV ();
103use Fcntl; 223use 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}
145 224
146our %CB; 225our %CB;
147our $FH; 226our $FH;
148our $ID = "aaa0"; 227our $ID = "aaa0";
149our ($fh_r_watcher, $fh_w_watcher); 228our ($fh_r_watcher, $fh_w_watcher);
150our $sync_timer; 229our $sync_timer;
151our $write_buf; 230our $write_buf;
152our $read_buf; 231our $read_buf;
153 232
154our $SYNC = EV::timer_ns 0, 60, sub {
155 $_[0]->stop;
156 CFPlus::DB::Server::req (sync => sub { });
157};
158
159sub fh_write { 233sub fh_write {
160 my $len = syswrite $FH, $write_buf; 234 my $len = syswrite $FH, $write_buf;
161 235
162 substr $write_buf, 0, $len, ""; 236 substr $write_buf, 0, $len, "";
163 237
… …
206 my $id = ++$ID; 280 my $id = ++$ID;
207 $write_buf .= pack "N/a*", Storable::freeze [$id, $type, @args]; 281 $write_buf .= pack "N/a*", Storable::freeze [$id, $type, @args];
208 $CB{$id} = $cb; 282 $CB{$id} = $cb;
209 283
210 $fh_w_watcher->start; 284 $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} 285}
287 286
288sub do_unlink { 287sub do_unlink {
289 unlink $_[0]; 288 unlink $_[0];
290} 289}
… …
345 344
346 print { $LOG_FH{$path} } "$ts $line\n" 345 print { $LOG_FH{$path} } "$ts $line\n"
347} 346}
348 347
349sub run { 348sub run {
350 ($FH, my $fh) = CFPlus::socketpipe; 349 ($FH, my $fh) = DC::socketpipe;
351 350
352 my $oldfh = select $FH; $| = 1; select $oldfh; 351 my $oldfh = select $FH; $| = 1; select $oldfh;
353 my $oldfh = select $fh; $| = 1; select $oldfh; 352 my $oldfh = select $fh; $| = 1; select $oldfh;
354 353
355 my $pid = fork; 354 my $pid = fork;
356 355
357 if (defined $pid && !$pid) { 356 if (defined $pid && !$pid) {
358 local $SIG{QUIT}; 357 local $SIG{QUIT} = "IGNORE";
359 local $SIG{__DIE__}; 358 local $SIG{__DIE__};
360 local $SIG{__WARN__}; 359 local $SIG{__WARN__};
361 eval { 360 eval {
362 close $FH; 361 close $FH;
363
364 unless (eval { open_db }) {
365 eval { File::Path::rmtree $DB_HOME };
366 open_db;
367 }
368 362
369 while () { 363 while () {
370 4 == read $fh, my $len, 4 364 4 == read $fh, my $len, 4
371 or last; 365 or last;
372 $len = unpack "N", $len; 366 $len = unpack "N", $len;
… …
374 or die "unexpected eof while reading request"; 368 or die "unexpected eof while reading request";
375 369
376 $req = Storable::thaw $req; 370 $req = Storable::thaw $req;
377 371
378 my ($id, $type, @args) = @$req; 372 my ($id, $type, @args) = @$req;
379 my $cb = CFPlus::DB::Server->can ("do_$type") 373 my $cb = DC::DB::Server->can ("do_$type")
380 or die "$type: unknown database request type\n"; 374 or die "$type: unknown database request type\n";
381 my $res = pack "N/a*", Storable::freeze [$id, $cb->(@args)]; 375 my $res = pack "N/a*", Storable::freeze [$id, $cb->(@args)];
382 (syswrite $fh, $res) == length $res 376 (syswrite $fh, $res) == length $res
383 or die "DB::write: $!"; 377 or die "DB::write: $!";
384 } 378 }
385 }; 379 };
386 380
387 my $error = $@; 381 my $error = $@;
388 382
389 eval { 383 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; 384 Storable::store_fd [die => $error], $fh;
396 }; 385 };
397 386
387 warn $error
388 if $error;
389
398 CFPlus::_exit 0; 390 DC::_exit 0;
399 } 391 }
400 392
401 close $fh; 393 close $fh;
402 CFPlus::fh_nonblocking $FH, 1; 394 DC::fh_nonblocking $FH, 1;
403 395
404 $CB{die} = sub { die shift }; 396 $CB{die} = sub { die shift };
405 397
406 $fh_r_watcher = EV::io $FH, EV::READ , \&fh_read; 398 $fh_r_watcher = EV::io $FH, EV::READ , \&fh_read;
407 $fh_w_watcher = EV::io $FH, EV::WRITE, \&fh_write; 399 $fh_w_watcher = EV::io $FH, EV::WRITE, \&fh_write;
408 $SYNC->again unless $SYNC->is_active;
409} 400}
410 401
411sub stop { 402sub stop {
412 close $FH; 403 close $FH;
413} 404}
414 405
406package DC::DB;
407
408sub open_db {
409 unless (eval { try_open_db }) {
410 warn "$@";#d#
411 eval { File::Path::rmtree $DB_HOME };
412 try_open_db;
413 }
414
415 # fetch the full face table first
416 unless ($facemap) {
417 do_table facemap => sub {
418 $facemap = $_[0];
419 delete $facemap->{id};
420 my %maptile = reverse %$facemap;#d#
421 if ((scalar keys %$facemap) != (scalar keys %maptile)) {#d#
422 $facemap = { };#d#
423 DC::error "FATAL: facemap is not a 1:1 mapping, please report this and delete your $DB_HOME directory!\n";#d#
424 }#d#
425 };
426 }
427
428 $WATCHER = EV::io BDB::poll_fileno, EV::READ, \&BDB::poll_cb;
429 $SYNC = EV::timer_ns 0, 60, sub {
430 warn "SYNC\n";#d#
431 $_[0]->stop;
432 db_env_txn_checkpoint $DB_ENV, 0, 0, 0, sub { };
433 };
434}
435
436END {
437 %DB_TABLE = ();
438 undef $DB_ENV;
439}
440
4151; 4411;
416 442
417=back 443=back
418 444
419=head1 AUTHOR 445=head1 AUTHOR

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