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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 1.30 by root, Thu Dec 27 18:35:56 2007 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 cfplus
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 Event (); 23use BDB;
24 24
25use CFPlus; 25use DC;
26 26
27our $DB_HOME = "$Crossfire::VARDIR/cfplus-$BerkeleyDB::db_version-$Config{archname}"; 27our $DBDIR = "cfplus-" . BDB::VERSION . "-$Config{archname}";
28our $DB_HOME = "$Deliantra::VARDIR/$DBDIR";
29
30if (!-e $DB_HOME and -e "$Deliantra::OLDDIR/$DBDIR") {
31 rename "$Deliantra::OLDDIR/$DBDIR", $DB_HOME;
32 print STDERR "INFO: moved old database from $Deliantra::OLDDIR/$DBDIR to $DB_HOME\n";
33}
34
35BDB::max_poll_time 0.03;
36
37our $DB_ENV;
38our $DB_STATE;
39our %DB_TABLE;
40
41sub open_db {
42 mkdir $DB_HOME, 0777;
43
44 $DB_ENV = db_env_create;
45
46 $DB_ENV->set_errfile (\*STDERR);
47 $DB_ENV->set_msgfile (\*STDERR);
48 $DB_ENV->set_verbose (-1, 1);
49
50 $DB_ENV->set_flags (BDB::AUTO_COMMIT | BDB::LOG_AUTOREMOVE | BDB::TXN_WRITE_NOSYNC);
51 $DB_ENV->set_cachesize (0, 2048 * 1024, 0);
52
53 db_env_open $DB_ENV, $DB_HOME,
54 BDB::CREATE | BDB::REGISTER | BDB::RECOVER | BDB::INIT_MPOOL | BDB::INIT_LOCK | BDB::INIT_TXN,
55 0666;
56
57 $! and die "cannot open database environment $DB_HOME: " . BDB::strerror;
58
59 1
60}
61
62sub table($) {
63 $DB_TABLE{$_[0]} ||= do {
64 my ($table) = @_;
65
66 $table =~ s/([^a-zA-Z0-9_\-])/sprintf "=%x=", ord $1/ge;
67
68 my $db = db_create $DB_ENV;
69 $db->set_flags (BDB::CHKSUM);
70
71 db_open $db, undef, $table, undef, BDB::BTREE,
72 BDB::AUTO_COMMIT | BDB::CREATE | BDB::READ_UNCOMMITTED, 0666;
73
74 $! and "unable to open/create database table $_[0]: ". BDB::strerror;
75
76 $db
77 }
78}
79
80#############################################################################
81
82unless (eval { open_db }) {
83 warn "$@";#d#
84 eval { File::Path::rmtree $DB_HOME };
85 open_db;
86}
87
88our $WATCHER = EV::io BDB::poll_fileno, EV::READ, \&BDB::poll_cb;
89
90our $SYNC = EV::timer_ns 0, 60, sub {
91 $_[0]->stop;
92 db_env_txn_checkpoint $DB_ENV, 0, 0, 0, sub { };
93};
94
95our $tilemap;
96
97sub exists($$$) {
98 my ($db, $key, $cb) = @_;
99
100 my $data;
101 db_get table $db, undef, $key, $data, 0, sub {
102 $cb->($! ? () : length $data);
103 };
104}
105
106sub get($$$) {
107 my ($db, $key, $cb) = @_;
108
109 my $data;
110 db_get table $db, undef, $key, $data, 0, sub {
111 $cb->($! ? () : $data);
112 };
113}
114
115sub put($$$$) {
116 my ($db, $key, $data, $cb) = @_;
117
118 db_put table $db, undef, $key, $data, 0, sub {
119 $cb->($!);
120 $SYNC->again unless $SYNC->is_active;
121 };
122}
123
124sub do_table {
125 my ($db, $cb) = @_;
126
127 $db = table $db;
128
129 my $cursor = $db->cursor;
130 my %kv;
131
132 for (;;) {
133 db_c_get $cursor, my $k, my $v, BDB::NEXT;
134 last if $!;
135 $kv{$k} = $v;
136 }
137
138 $cb->(\%kv);
139}
140
141sub do_get_tile_id {
142 my ($name, $cb) = @_;
143
144 my $table = table "facemap";
145 my $id;
146
147 db_get $table, undef, $name, $id, 0;
148 return $cb->($id) unless $!;
149
150 for (1..100) {
151 my $txn = $DB_ENV->txn_begin;
152 db_get $table, $txn, id => $id, 0;
153
154 $id = 64 if $id < 64;
155
156 ++$id;
157
158 db_put $table, $txn, id => $id, 0;
159 db_txn_finish $txn;
160
161 $SYNC->again unless $SYNC->is_active;
162
163 return $cb->($id) unless $!;
164
165 select undef, undef, undef, 0.01 * rand;
166 }
167
168 die "maximum number of transaction retries reached - database problems?";
169}
170
171sub get_tile_id_sync($) {
172 my ($name) = @_;
173
174 $tilemap->{$name} ||= do {
175 my $id;
176 do_get_tile_id $name, sub {
177 $id = $_[0];
178 };
179 BDB::flush;
180 $id
181 }
182}
183
184#############################################################################
28 185
29sub path_of_res($) { 186sub path_of_res($) {
30 utf8::downgrade $_[0]; # bug in unpack "H*" 187 utf8::downgrade $_[0]; # bug in unpack "H*"
31 "$DB_HOME/res-data-" . unpack "H*", $_[0] 188 "$DB_HOME/res-data-" . unpack "H*", $_[0]
32} 189}
33 190
34sub sync { 191sub sync {
35 # for debugging 192 # for debugging
36 #CFPlus::DB::Server::req (sync => sub { }); 193 #DC::DB::Server::req (sync => sub { });
37 CFPlus::DB::Server::sync (); 194 DC::DB::Server::sync ();
38}
39
40sub exists($$$) {
41 CFPlus::DB::Server::req (exists => @_);
42}
43
44sub get($$$) {
45 CFPlus::DB::Server::req (get => @_);
46}
47
48sub put($$$$) {
49 CFPlus::DB::Server::req (put => @_);
50} 195}
51 196
52sub unlink($$) { 197sub unlink($$) {
53 CFPlus::DB::Server::req (unlink => @_); 198 DC::DB::Server::req (unlink => @_);
54} 199}
55 200
56sub read_file($$) { 201sub read_file($$) {
57 CFPlus::DB::Server::req (read_file => @_); 202 DC::DB::Server::req (read_file => @_);
58} 203}
59 204
60sub write_file($$$) { 205sub write_file($$$) {
61 CFPlus::DB::Server::req (write_file => @_); 206 DC::DB::Server::req (write_file => @_);
62} 207}
63 208
64sub prefetch_file($$$) { 209sub prefetch_file($$$) {
65 CFPlus::DB::Server::req (prefetch_file => @_); 210 DC::DB::Server::req (prefetch_file => @_);
66} 211}
67 212
68sub logprint($$$) { 213sub logprint($$$) {
69 CFPlus::DB::Server::req (logprint => @_); 214 DC::DB::Server::req (logprint => @_);
70} 215}
71 216
72our $tilemap; 217#############################################################################
73 218
74sub get_tile_id_sync($) {
75 my ($hash) = @_;
76
77 # fetch the full face table first 219# fetch the full face table first
78 unless ($tilemap) { 220unless ($tilemap) {
79 CFPlus::DB::Server::req (table => facemap => sub { $tilemap = $_[0] }); 221 do_table facemap => sub {
80 sync; 222 $tilemap = $_[0];
223 delete $tilemap->{id};
224 my %maptile = reverse %$tilemap;#d#
225 if ((scalar keys %$tilemap) != (scalar keys %maptile)) {#d#
226 $tilemap = { };#d#
227 DC::error "FATAL: facemap is not a 1:1 mapping, please report this and delete your $DB_HOME directory!\n";#d#
228 }#d#
81 } 229 };
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} 230}
90 231
91package CFPlus::DB::Server; 232package DC::DB::Server;
92 233
93use strict; 234use strict;
94 235
236use EV ();
95use Fcntl; 237use 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}
137 238
138our %CB; 239our %CB;
139our $FH; 240our $FH;
140our $ID = "aaa0"; 241our $ID = "aaa0";
141our ($fh_r_watcher, $fh_w_watcher); 242our ($fh_r_watcher, $fh_w_watcher);
142our $sync_timer; 243our $sync_timer;
143our $write_buf; 244our $write_buf;
144our $read_buf; 245our $read_buf;
145 246
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 { 247sub fh_write {
152 my $len = syswrite $FH, $write_buf; 248 my $len = syswrite $FH, $write_buf;
153 249
154 substr $write_buf, 0, $len, ""; 250 substr $write_buf, 0, $len, "";
155 251
… …
198 my $id = ++$ID; 294 my $id = ++$ID;
199 $write_buf .= pack "N/a*", Storable::freeze [$id, $type, @args]; 295 $write_buf .= pack "N/a*", Storable::freeze [$id, $type, @args];
200 $CB{$id} = $cb; 296 $CB{$id} = $cb;
201 297
202 $fh_w_watcher->start; 298 $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} 299}
278 300
279sub do_unlink { 301sub do_unlink {
280 unlink $_[0]; 302 unlink $_[0];
281} 303}
… …
336 358
337 print { $LOG_FH{$path} } "$ts $line\n" 359 print { $LOG_FH{$path} } "$ts $line\n"
338} 360}
339 361
340sub run { 362sub run {
341 ($FH, my $fh) = CFPlus::socketpipe; 363 ($FH, my $fh) = DC::socketpipe;
342 364
343 my $oldfh = select $FH; $| = 1; select $oldfh; 365 my $oldfh = select $FH; $| = 1; select $oldfh;
344 my $oldfh = select $fh; $| = 1; select $oldfh; 366 my $oldfh = select $fh; $| = 1; select $oldfh;
345 367
346 my $pid = fork; 368 my $pid = fork;
347 369
348 if (defined $pid && !$pid) { 370 if (defined $pid && !$pid) {
349 local $SIG{QUIT}; 371 local $SIG{QUIT} = "IGNORE";
350 local $SIG{__DIE__}; 372 local $SIG{__DIE__};
351 local $SIG{__WARN__}; 373 local $SIG{__WARN__};
352 eval { 374 eval {
353 close $FH; 375 close $FH;
354
355 unless (eval { open_db }) {
356 eval { File::Path::rmtree $DB_HOME };
357 open_db;
358 }
359 376
360 while () { 377 while () {
361 4 == read $fh, my $len, 4 378 4 == read $fh, my $len, 4
362 or last; 379 or last;
363 $len = unpack "N", $len; 380 $len = unpack "N", $len;
… …
365 or die "unexpected eof while reading request"; 382 or die "unexpected eof while reading request";
366 383
367 $req = Storable::thaw $req; 384 $req = Storable::thaw $req;
368 385
369 my ($id, $type, @args) = @$req; 386 my ($id, $type, @args) = @$req;
370 my $cb = CFPlus::DB::Server->can ("do_$type") 387 my $cb = DC::DB::Server->can ("do_$type")
371 or die "$type: unknown database request type\n"; 388 or die "$type: unknown database request type\n";
372 my $res = pack "N/a*", Storable::freeze [$id, $cb->(@args)]; 389 my $res = pack "N/a*", Storable::freeze [$id, $cb->(@args)];
373 (syswrite $fh, $res) == length $res 390 (syswrite $fh, $res) == length $res
374 or die; 391 or die "DB::write: $!";
375 } 392 }
376 }; 393 };
377 394
378 my $error = $@; 395 my $error = $@;
379 396
380 eval { 397 eval {
381 undef %DB_TABLE;
382 undef $DB_ENV;
383
384 Storable::store_fd [die => $error], $fh; 398 Storable::store_fd [die => $error], $fh;
385 }; 399 };
386 400
401 warn $error
402 if $error;
403
387 CFPlus::_exit 0; 404 DC::_exit 0;
388 } 405 }
389 406
390 close $fh; 407 close $fh;
391 CFPlus::fh_nonblocking $FH, 1; 408 DC::fh_nonblocking $FH, 1;
392 409
393 $CB{die} = sub { die shift }; 410 $CB{die} = sub { die shift };
394 411
395 $fh_r_watcher = Event->io (fd => $FH, poll => 'r', nice => 1, cb => \&fh_read); 412 $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); 413 $fh_w_watcher = EV::io $FH, EV::WRITE, \&fh_write;
397 $SYNC->start;
398} 414}
399 415
400sub stop { 416sub stop {
401 close $FH; 417 close $FH;
402} 418}

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