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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 1.38 by root, Fri Jul 18 22:40:51 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::LOG_AUTOREMOVE | BDB::TXN_WRITE_NOSYNC);
63 $env->set_cachesize (0, 2048 * 1024, 0);
64
65 db_env_open $env, $DB_HOME,
66 BDB::CREATE | BDB::REGISTER | BDB::RECOVER | BDB::INIT_MPOOL | BDB::INIT_LOCK | BDB::INIT_TXN,
67 0666;
68
69 $! and die "cannot open database environment $DB_HOME: " . BDB::strerror;
70
71 $DB_ENV = $env;
72
73 1
74}
75
76sub table($) {
77 $DB_TABLE{$_[0]} ||= do {
78 my ($table) = @_;
79
80 $table =~ s/([^a-zA-Z0-9_\-])/sprintf "=%x=", ord $1/ge;
81
82 my $db = db_create $DB_ENV;
83 $db->set_flags (BDB::CHKSUM);
84
85 db_open $db, undef, $table, undef, BDB::BTREE,
86 BDB::AUTO_COMMIT | BDB::CREATE | BDB::READ_UNCOMMITTED, 0666;
87
88 $! and "unable to open/create database table $_[0]: ". BDB::strerror;
89
90 $db
91 }
92}
93
94#############################################################################
95
96our $WATCHER;
97our $SYNC;
98our $facemap;
99
100sub exists($$$) {
101 my ($db, $key, $cb) = @_;
102
103 my $data;
104 db_get table $db, undef, $key, $data, 0, sub {
105 $cb->($! ? () : length $data);
106 };
107}
108
109sub get($$$) {
110 my ($db, $key, $cb) = @_;
111
112 my $data;
113 db_get table $db, undef, $key, $data, 0, sub {
114 $cb->($! ? () : $data);
115 };
116}
117
118sub put($$$$) {
119 my ($db, $key, $data, $cb) = @_;
120
121 db_put table $db, undef, $key, $data, 0, sub {
122 $cb->($!);
123 $SYNC->again unless $SYNC->is_active;
124 };
125}
126
127sub do_table {
128 my ($db, $cb) = @_;
129
130 $db = table $db;
131
132 my $cursor = $db->cursor;
133 my %kv;
134
135 for (;;) {
136 db_c_get $cursor, my $k, my $v, BDB::NEXT;
137 last if $!;
138 $kv{$k} = $v;
139 }
140
141 $cb->(\%kv);
142}
143
144sub do_get_tile_id {
145 my ($name, $cb) = @_;
146
147 my $table = table "facemap";
148 my $id;
149
150 db_get $table, undef, $name => $id, 0;
151 $! or return $cb->($id);
152
153 unless ($TILE_SEQ) {
154 $TILE_SEQ = $table->sequence;
155 $TILE_SEQ->initial_value (64);
156 $TILE_SEQ->set_cachesize (0);
157 db_sequence_open $TILE_SEQ, undef, "id", BDB::CREATE;
158 }
159
160 db_sequence_get $TILE_SEQ, undef, 1, my $id;
161
162 die "unable to allocate tile id: $!"
163 if $!;
164
165 db_put $table, undef, $name => $id, 0;
166 $cb->($id);
167
168}
169
170sub get_tile_id_sync($) {
171 my ($name) = @_;
172
173 $facemap->{$name} ||= do {
174 my $id;
175 do_get_tile_id $name, sub {
176 $id = $_[0];
177 };
178 BDB::flush;
179 $id
180 }
181}
182
183#############################################################################
27 184
28sub path_of_res($) { 185sub path_of_res($) {
29 utf8::downgrade $_[0]; # bug in unpack "H*" 186 utf8::downgrade $_[0]; # bug in unpack "H*"
30 "$DB_HOME/res-data-" . unpack "H*", $_[0] 187 "$DB_HOME/res-data-" . unpack "H*", $_[0]
31} 188}
32 189
33sub sync { 190sub sync {
34 # for debugging 191 # for debugging
35 #CFPlus::DB::Server::req (sync => sub { }); 192 #DC::DB::Server::req (sync => sub { });
36 CFPlus::DB::Server::sync (); 193 DC::DB::Server::sync ();
37}
38
39sub exists($$$) {
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
222use EV ();
102use Fcntl; 223use 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}
144 224
145our %CB; 225our %CB;
146our $FH; 226our $FH;
147our $ID = "aaa0"; 227our $ID = "aaa0";
148our ($fh_r_watcher, $fh_w_watcher); 228our ($fh_r_watcher, $fh_w_watcher);
149our $sync_timer; 229our $sync_timer;
150our $write_buf; 230our $write_buf;
151our $read_buf; 231our $read_buf;
152 232
153our $SYNC = EV::timer_ns 0, 60, sub {
154 $_[0]->stop;
155 CFPlus::DB::Server::req (sync => sub { });
156};
157
158sub fh_write { 233sub fh_write {
159 my $len = syswrite $FH, $write_buf; 234 my $len = syswrite $FH, $write_buf;
160 235
161 substr $write_buf, 0, $len, ""; 236 substr $write_buf, 0, $len, "";
162 237
… …
205 my $id = ++$ID; 280 my $id = ++$ID;
206 $write_buf .= pack "N/a*", Storable::freeze [$id, $type, @args]; 281 $write_buf .= pack "N/a*", Storable::freeze [$id, $type, @args];
207 $CB{$id} = $cb; 282 $CB{$id} = $cb;
208 283
209 $fh_w_watcher->start; 284 $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} 285}
286 286
287sub do_unlink { 287sub do_unlink {
288 unlink $_[0]; 288 unlink $_[0];
289} 289}
… …
344 344
345 print { $LOG_FH{$path} } "$ts $line\n" 345 print { $LOG_FH{$path} } "$ts $line\n"
346} 346}
347 347
348sub run { 348sub run {
349 ($FH, my $fh) = CFPlus::socketpipe; 349 ($FH, my $fh) = DC::socketpipe;
350 350
351 my $oldfh = select $FH; $| = 1; select $oldfh; 351 my $oldfh = select $FH; $| = 1; select $oldfh;
352 my $oldfh = select $fh; $| = 1; select $oldfh; 352 my $oldfh = select $fh; $| = 1; select $oldfh;
353 353
354 my $pid = fork; 354 my $pid = fork;
355 355
356 if (defined $pid && !$pid) { 356 if (defined $pid && !$pid) {
357 local $SIG{QUIT}; 357 local $SIG{QUIT} = "IGNORE";
358 local $SIG{__DIE__}; 358 local $SIG{__DIE__};
359 local $SIG{__WARN__}; 359 local $SIG{__WARN__};
360 eval { 360 eval {
361 close $FH; 361 close $FH;
362
363 unless (eval { open_db }) {
364 eval { File::Path::rmtree $DB_HOME };
365 open_db;
366 }
367 362
368 while () { 363 while () {
369 4 == read $fh, my $len, 4 364 4 == read $fh, my $len, 4
370 or last; 365 or last;
371 $len = unpack "N", $len; 366 $len = unpack "N", $len;
… …
373 or die "unexpected eof while reading request"; 368 or die "unexpected eof while reading request";
374 369
375 $req = Storable::thaw $req; 370 $req = Storable::thaw $req;
376 371
377 my ($id, $type, @args) = @$req; 372 my ($id, $type, @args) = @$req;
378 my $cb = CFPlus::DB::Server->can ("do_$type") 373 my $cb = DC::DB::Server->can ("do_$type")
379 or die "$type: unknown database request type\n"; 374 or die "$type: unknown database request type\n";
380 my $res = pack "N/a*", Storable::freeze [$id, $cb->(@args)]; 375 my $res = pack "N/a*", Storable::freeze [$id, $cb->(@args)];
381 (syswrite $fh, $res) == length $res 376 (syswrite $fh, $res) == length $res
382 or die "DB::write: $!"; 377 or die "DB::write: $!";
383 } 378 }
384 }; 379 };
385 380
386 my $error = $@; 381 my $error = $@;
387 382
388 eval { 383 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; 384 Storable::store_fd [die => $error], $fh;
395 }; 385 };
396 386
387 warn $error
388 if $error;
389
397 CFPlus::_exit 0; 390 DC::_exit 0;
398 } 391 }
399 392
400 close $fh; 393 close $fh;
401 CFPlus::fh_nonblocking $FH, 1; 394 DC::fh_nonblocking $FH, 1;
402 395
403 $CB{die} = sub { die shift }; 396 $CB{die} = sub { die shift };
404 397
405 $fh_r_watcher = EV::io $FH, EV::READ , \&fh_read; 398 $fh_r_watcher = EV::io $FH, EV::READ , \&fh_read;
406 $fh_w_watcher = EV::io $FH, EV::WRITE, \&fh_write; 399 $fh_w_watcher = EV::io $FH, EV::WRITE, \&fh_write;
407 $SYNC->again unless $SYNC->is_active;
408} 400}
409 401
410sub stop { 402sub stop {
411 close $FH; 403 close $FH;
412} 404}
413 405
406package DC::DB;
407
408sub nuke_db {
409 File::Path::mkpath [$DB_HOME];
410 eval { File::Path::rmtree $DB_HOME };
411}
412
413sub open_db {
414 unless (eval { try_open_db }) {
415 warn "$@";#d#
416 eval { nuke_db };
417 try_open_db;
418 }
419
420 # fetch the full face table first
421 unless ($facemap) {
422 do_table facemap => sub {
423 $facemap = $_[0];
424 delete $facemap->{id};
425 my %maptile = reverse %$facemap;#d#
426 if ((scalar keys %$facemap) != (scalar keys %maptile)) {#d#
427 $facemap = { };#d#
428 DC::error "FATAL: facemap is not a 1:1 mapping, please report this and delete your $DB_HOME directory!\n";#d#
429 }#d#
430 };
431 }
432
433 $WATCHER = EV::io BDB::poll_fileno, EV::READ, \&BDB::poll_cb;
434 $SYNC = EV::timer_ns 0, 60, sub {
435 $_[0]->stop;
436 db_env_txn_checkpoint $DB_ENV, 0, 0, 0, sub { };
437 };
438}
439
440END {
441 db_env_txn_checkpoint $DB_ENV, 0, 0, 0
442 if $DB_ENV;
443
444 undef $TILE_SEQ;
445 %DB_TABLE = ();
446 undef $DB_ENV;
447}
448
4141; 4491;
415 450
416=back 451=back
417 452
418=head1 AUTHOR 453=head1 AUTHOR

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