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Comparing deliantra/Deliantra-Client/DC/DB.pm (file contents):
Revision 1.16 by root, Mon Aug 6 05:06:33 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;
23use Event (); 24use BDB;
24 25
25use CFPlus; 26use DC;
26 27
27our $DB_HOME = "$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($$$$) {
125 my ($db, $key, $data, $cb) = @_;
126
127 db_put table $db, undef, $key, $data, 0, sub {
128 $cb->($!);
129 $SYNC->again unless $SYNC->is_active;
130 };
131}
132
133sub do_table {
134 my ($db, $cb) = @_;
135
136 $db = table $db;
137
138 my $cursor = $db->cursor;
139 my %kv;
140
141 for (;;) {
142 db_c_get $cursor, my $k, my $v, BDB::NEXT;
143 last if $!;
144 $kv{$k} = $v;
145 }
146
147 $cb->(\%kv);
148}
149
150sub do_get_tile_id {
151 my ($name, $cb) = @_;
152
153 my $table = table "facemap";
154 my $id;
155
156 db_get $table, undef, $name => $id, 0;
157 $! or return $cb->($id);
158
159 unless ($TILE_SEQ) {
160 $TILE_SEQ = $table->sequence;
161 $TILE_SEQ->initial_value (64);
162 $TILE_SEQ->set_cachesize (0);
163 db_sequence_open $TILE_SEQ, undef, "id", BDB::CREATE;
164 }
165
166 db_sequence_get $TILE_SEQ, undef, 1, my $id;
167
168 die "unable to allocate tile id: $!"
169 if $!;
170
171 db_put $table, undef, $name => $id, 0;
172 $cb->($id);
173
174}
175
176sub get_tile_id_sync($) {
177 my ($name) = @_;
178
179 $facemap->{$name} ||= do {
180 my $id;
181 do_get_tile_id $name, sub {
182 $id = $_[0];
183 };
184 BDB::flush;
185 $id
186 }
187}
188
189#############################################################################
28 190
29sub path_of_res($) { 191sub path_of_res($) {
30 utf8::downgrade $_[0]; # bug in unpack "H*" 192 utf8::downgrade $_[0]; # bug in unpack "H*"
31 "$DB_HOME/res-data-" . unpack "H*", $_[0] 193 "$DB_HOME/res-data-" . unpack "H*", $_[0]
32} 194}
33 195
34sub sync { 196sub sync {
35 # for debugging 197 # for debugging
36 #CFPlus::DB::Server::req (sync => sub { }); 198 #DC::DB::Server::req (sync => sub { });
37 CFPlus::DB::Server::sync (); 199 DC::DB::Server::sync ();
38}
39
40sub exists($$$) {
41 CFPlus::DB::Server::req (exists => @_);
42}
43
44sub get($$$) {
45 CFPlus::DB::Server::req (get => @_);
46}
47
48sub put($$$$) {
49 CFPlus::DB::Server::req (put => @_);
50} 200}
51 201
52sub unlink($$) { 202sub unlink($$) {
53 CFPlus::DB::Server::req (unlink => @_); 203 DC::DB::Server::req (unlink => @_);
54} 204}
55 205
56sub read_file($$) { 206sub read_file($$) {
57 CFPlus::DB::Server::req (read_file => @_); 207 DC::DB::Server::req (read_file => @_);
58} 208}
59 209
60sub write_file($$$) { 210sub write_file($$$) {
61 CFPlus::DB::Server::req (write_file => @_); 211 DC::DB::Server::req (write_file => @_);
62} 212}
63 213
64sub prefetch_file($$$) { 214sub prefetch_file($$$) {
65 CFPlus::DB::Server::req (prefetch_file => @_); 215 DC::DB::Server::req (prefetch_file => @_);
66} 216}
67 217
68sub logprint($$$) { 218sub logprint($$$) {
69 CFPlus::DB::Server::req (logprint => @_); 219 DC::DB::Server::req (logprint => @_);
70} 220}
71 221
72our $tilemap; 222#############################################################################
73 223
74sub get_tile_id_sync($) {
75 my ($hash) = @_;
76
77 # fetch the full face table first
78 unless ($tilemap) {
79 CFPlus::DB::Server::req (table => facemap => sub { $tilemap = $_[0] });
80 sync;
81 }
82
83 $tilemap->{$hash} ||= do {
84 my $id;
85 CFPlus::DB::Server::req (get_tile_id => $hash, sub { $id = $_[0] });
86 sync;
87 $id
88 }
89}
90
91package CFPlus::DB::Server; 224package DC::DB::Server;
92 225
93use strict; 226use strict;
94 227
228use EV ();
95use Fcntl; 229use Fcntl;
96use BerkeleyDB;
97
98our $DB_ENV;
99our $DB_STATE;
100our %DB_TABLE;
101
102sub open_db {
103 mkdir $DB_HOME, 0777;
104 my $recover = $BerkeleyDB::db_version >= 4.4
105 ? eval "DB_REGISTER | DB_RECOVER"
106 : 0;
107
108 $DB_ENV = new BerkeleyDB::Env
109 -Home => $DB_HOME,
110 -Cachesize => 8_000_000,
111 -ErrFile => "$DB_HOME/errorlog.txt",
112# -ErrPrefix => "DATABASE",
113 -Verbose => 1,
114 -Flags => DB_CREATE | DB_RECOVER | DB_INIT_MPOOL | DB_INIT_LOCK | DB_INIT_TXN | $recover,
115 -SetFlags => DB_AUTO_COMMIT | DB_LOG_AUTOREMOVE,
116 or die "unable to create/open database home $DB_HOME: $BerkeleyDB::Error";
117
118 1
119}
120
121sub table($) {
122 $DB_TABLE{$_[0]} ||= do {
123 my ($table) = @_;
124
125 $table =~ s/([^a-zA-Z0-9_\-])/sprintf "=%x=", ord $1/ge;
126
127 new BerkeleyDB::Btree
128 -Env => $DB_ENV,
129 -Filename => $table,
130# -Filename => "database",
131# -Subname => $table,
132 -Property => DB_CHKSUM,
133 -Flags => DB_CREATE | DB_UPGRADE,
134 or die "unable to create/open database table $_[0]: $BerkeleyDB::Error"
135 }
136}
137 230
138our %CB; 231our %CB;
139our $FH; 232our $FH;
140our $ID = "aaa0"; 233our $ID = "aaa0";
141our ($fh_r_watcher, $fh_w_watcher); 234our ($fh_r_watcher, $fh_w_watcher);
142our $sync_timer; 235our $sync_timer;
143our $write_buf; 236our $write_buf;
144our $read_buf; 237our $read_buf;
145 238
146our $SYNC = Event->idle (min => 5, max => 60, parked => 1, cb => sub {
147 CFPlus::DB::Server::req (sync => sub { });
148 $_[0]->w->stop;
149});
150
151sub fh_write { 239sub fh_write {
152 my $len = syswrite $FH, $write_buf; 240 my $len = syswrite $FH, $write_buf;
153 241
154 substr $write_buf, 0, $len, ""; 242 substr $write_buf, 0, $len, "";
155 243
… …
198 my $id = ++$ID; 286 my $id = ++$ID;
199 $write_buf .= pack "N/a*", Storable::freeze [$id, $type, @args]; 287 $write_buf .= pack "N/a*", Storable::freeze [$id, $type, @args];
200 $CB{$id} = $cb; 288 $CB{$id} = $cb;
201 289
202 $fh_w_watcher->start; 290 $fh_w_watcher->start;
203 $SYNC->start;
204}
205
206sub do_sync {
207 $DB_ENV->txn_checkpoint (0, 0, 0);
208 ()
209}
210
211sub do_exists {
212 my ($db, $key) = @_;
213
214 utf8::downgrade $key;
215 my $data;
216 (table $db)->db_get ($key, $data) == 0
217 ? length $data
218 : ()
219}
220
221sub do_get {
222 my ($db, $key) = @_;
223
224 utf8::downgrade $key;
225 my $data;
226 (table $db)->db_get ($key, $data) == 0
227 ? $data
228 : ()
229}
230
231sub do_put {
232 my ($db, $key, $data) = @_;
233
234 utf8::downgrade $key;
235 utf8::downgrade $data;
236 (table $db)->db_put ($key => $data)
237}
238
239sub do_table {
240 my ($db) = @_;
241
242 $db = table $db;
243
244 my $cursor = $db->db_cursor;
245 my %kv;
246 my ($k, $v);
247 $kv{$k} = $v while $cursor->c_get ($k, $v, BerkeleyDB::DB_NEXT) == 0;
248
249 \%kv
250}
251
252sub do_get_tile_id {
253 my ($hash) = @_;
254
255 my $id;
256 my $table = table "facemap";
257
258 return $id
259 if $table->db_get ($hash, $id) == 0;
260
261 for (1..100) {
262 my $txn = $DB_ENV->txn_begin;
263 my $status = $table->db_get (id => $id);
264 if ($status == 0 || $status == BerkeleyDB::DB_NOTFOUND) {
265 $id = ($id || 64) + 1;
266 if ($table->db_put (id => $id) == 0
267 && $table->db_put ($hash => $id) == 0) {
268 $txn->txn_commit;
269
270 return $id;
271 }
272 }
273 $txn->txn_abort;
274 }
275
276 die "maximum number of transaction retries reached - database problems?";
277} 291}
278 292
279sub do_unlink { 293sub do_unlink {
280 unlink $_[0]; 294 unlink $_[0];
281} 295}
… …
336 350
337 print { $LOG_FH{$path} } "$ts $line\n" 351 print { $LOG_FH{$path} } "$ts $line\n"
338} 352}
339 353
340sub run { 354sub run {
341 ($FH, my $fh) = CFPlus::socketpipe; 355 ($FH, my $fh) = DC::socketpipe;
342 356
343 my $oldfh = select $FH; $| = 1; select $oldfh; 357 my $oldfh = select $FH; $| = 1; select $oldfh;
344 my $oldfh = select $fh; $| = 1; select $oldfh; 358 my $oldfh = select $fh; $| = 1; select $oldfh;
345 359
346 my $pid = fork; 360 my $pid = fork;
347 361
348 if (defined $pid && !$pid) { 362 if (defined $pid && !$pid) {
349 local $SIG{QUIT}; 363 local $SIG{QUIT} = "IGNORE";
350 local $SIG{__DIE__}; 364 local $SIG{__DIE__};
351 local $SIG{__WARN__}; 365 local $SIG{__WARN__};
352 eval { 366 eval {
353 close $FH; 367 close $FH;
354
355 unless (eval { open_db }) {
356 eval { File::Path::rmtree $DB_HOME };
357 open_db;
358 }
359 368
360 while () { 369 while () {
361 4 == read $fh, my $len, 4 370 4 == read $fh, my $len, 4
362 or last; 371 or last;
363 $len = unpack "N", $len; 372 $len = unpack "N", $len;
… …
365 or die "unexpected eof while reading request"; 374 or die "unexpected eof while reading request";
366 375
367 $req = Storable::thaw $req; 376 $req = Storable::thaw $req;
368 377
369 my ($id, $type, @args) = @$req; 378 my ($id, $type, @args) = @$req;
370 my $cb = CFPlus::DB::Server->can ("do_$type") 379 my $cb = DC::DB::Server->can ("do_$type")
371 or die "$type: unknown database request type\n"; 380 or die "$type: unknown database request type\n";
372 my $res = pack "N/a*", Storable::freeze [$id, $cb->(@args)]; 381 my $res = pack "N/a*", Storable::freeze [$id, $cb->(@args)];
373 (syswrite $fh, $res) == length $res 382 (syswrite $fh, $res) == length $res
374 or die; 383 or die "DB::write: $!";
375 } 384 }
376 }; 385 };
377 386
378 my $error = $@; 387 my $error = $@;
379 388
380 eval { 389 eval {
381 undef %DB_TABLE;
382 undef $DB_ENV;
383
384 Storable::store_fd [die => $error], $fh; 390 Storable::store_fd [die => $error], $fh;
385 }; 391 };
386 392
393 warn $error
394 if $error;
395
387 CFPlus::_exit 0; 396 DC::_exit 0;
388 } 397 }
389 398
390 close $fh; 399 close $fh;
391 CFPlus::fh_nonblocking $FH, 1; 400 DC::fh_nonblocking $FH, 1;
392 401
393 $CB{die} = sub { die shift }; 402 $CB{die} = sub { die shift };
394 403
395 $fh_r_watcher = Event->io (fd => $FH, poll => 'r', nice => 1, cb => \&fh_read); 404 $fh_r_watcher = EV::io $FH, EV::READ , \&fh_read;
396 $fh_w_watcher = Event->io (fd => $FH, poll => 'w', nice => -1, parked => 1, cb => \&fh_write); 405 $fh_w_watcher = EV::io $FH, EV::WRITE, \&fh_write;
397 $SYNC->start;
398} 406}
399 407
400sub stop { 408sub stop {
401 close $FH; 409 close $FH;
402} 410}
403 411
412package DC::DB;
413
414sub nuke_db {
415 File::Path::mkpath [$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
4041; 4551;
405 456
406=back 457=back
407 458
408=head1 AUTHOR 459=head1 AUTHOR

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