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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 1.32 by root, Sat Jan 19 04:49:37 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 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 $db
84 }
85}
86
87#############################################################################
88
89unless (eval { open_db }) {
90 warn "$@";#d#
91 eval { File::Path::rmtree $DB_HOME };
92 open_db;
93}
94
95our $WATCHER = EV::io BDB::poll_fileno, EV::READ, \&BDB::poll_cb;
96
97our $SYNC = EV::timer_ns 0, 60, sub {
98 $_[0]->stop;
99 db_env_txn_checkpoint $DB_ENV, 0, 0, 0, sub { };
100};
101
102our $tilemap;
103
104sub exists($$$) {
105 my ($db, $key, $cb) = @_;
106
107 my $data;
108 db_get table $db, undef, $key, $data, 0, sub {
109 $cb->($! ? () : length $data);
110 };
111}
112
113sub get($$$) {
114 my ($db, $key, $cb) = @_;
115
116 my $data;
117 db_get table $db, undef, $key, $data, 0, sub {
118 $cb->($! ? () : $data);
119 };
120}
121
122sub put($$$$) {
123 my ($db, $key, $data, $cb) = @_;
124
125 db_put table $db, undef, $key, $data, 0, sub {
126 $cb->($!);
127 $SYNC->again unless $SYNC->is_active;
128 };
129}
130
131sub do_table {
132 my ($db, $cb) = @_;
133
134 $db = table $db;
135
136 my $cursor = $db->cursor;
137 my %kv;
138
139 for (;;) {
140 db_c_get $cursor, my $k, my $v, BDB::NEXT;
141 last if $!;
142 $kv{$k} = $v;
143 }
144
145 $cb->(\%kv);
146}
147
148sub do_get_tile_id {
149 my ($name, $cb) = @_;
150
151 my $table = table "facemap";
152 my $id;
153
154 db_get $table, undef, $name, $id, 0;
155 return $cb->($id) unless $!;
156
157 for (1..100) {
158 my $txn = $DB_ENV->txn_begin;
159 db_get $table, $txn, id => $id, 0;
160
161 $id = 64 if $id < 64;
162
163 ++$id;
164
165 db_put $table, $txn, id => $id, 0;
166 db_txn_finish $txn;
167
168 $SYNC->again unless $SYNC->is_active;
169
170 return $cb->($id) unless $!;
171
172 select undef, undef, undef, 0.01 * rand;
173 }
174
175 die "maximum number of transaction retries reached - database problems?";
176}
177
178sub get_tile_id_sync($) {
179 my ($name) = @_;
180
181 $tilemap->{$name} ||= do {
182 my $id;
183 do_get_tile_id $name, sub {
184 $id = $_[0];
185 };
186 BDB::flush;
187 $id
188 }
189}
190
191#############################################################################
27 192
28sub path_of_res($) { 193sub path_of_res($) {
29 utf8::downgrade $_[0]; # bug in unpack "H*" 194 utf8::downgrade $_[0]; # bug in unpack "H*"
30 "$DB_HOME/res-data-" . unpack "H*", $_[0] 195 "$DB_HOME/res-data-" . unpack "H*", $_[0]
31} 196}
32 197
33sub sync { 198sub sync {
34 # for debugging 199 # for debugging
35 #CFPlus::DB::Server::req (sync => sub { }); 200 #DC::DB::Server::req (sync => sub { });
36 CFPlus::DB::Server::sync (); 201 DC::DB::Server::sync ();
37}
38
39sub exists($$$) {
40 CFPlus::DB::Server::req (exists => @_);
41}
42
43sub get($$$) {
44 CFPlus::DB::Server::req (get => @_);
45}
46
47sub put($$$$) {
48 CFPlus::DB::Server::req (put => @_);
49} 202}
50 203
51sub unlink($$) { 204sub unlink($$) {
52 CFPlus::DB::Server::req (unlink => @_); 205 DC::DB::Server::req (unlink => @_);
53} 206}
54 207
55sub read_file($$) { 208sub read_file($$) {
56 CFPlus::DB::Server::req (read_file => @_); 209 DC::DB::Server::req (read_file => @_);
57} 210}
58 211
59sub write_file($$$) { 212sub write_file($$$) {
60 CFPlus::DB::Server::req (write_file => @_); 213 DC::DB::Server::req (write_file => @_);
61} 214}
62 215
63sub prefetch_file($$$) { 216sub prefetch_file($$$) {
64 CFPlus::DB::Server::req (prefetch_file => @_); 217 DC::DB::Server::req (prefetch_file => @_);
65} 218}
66 219
67sub logprint($$$) { 220sub logprint($$$) {
68 CFPlus::DB::Server::req (logprint => @_); 221 DC::DB::Server::req (logprint => @_);
69} 222}
70 223
71our $tilemap; 224#############################################################################
72 225
73sub get_tile_id_sync($) {
74 my ($name) = @_;
75
76 # fetch the full face table first 226# fetch the full face table first
77 unless ($tilemap) { 227unless ($tilemap) {
78 CFPlus::DB::Server::req (table => facemap => sub { 228 do_table facemap => sub {
79 $tilemap = $_[0]; 229 $tilemap = $_[0];
80 delete $tilemap->{id}; 230 delete $tilemap->{id};
81 my %maptile = reverse %$tilemap;#d# 231 my %maptile = reverse %$tilemap;#d#
82 if ((scalar keys %$tilemap) != (scalar keys %maptile)) {#d# 232 if ((scalar keys %$tilemap) != (scalar keys %maptile)) {#d#
83 $tilemap = { };#d# 233 $tilemap = { };#d#
84 CFPlus::error "FATAL: facemap is not a 1:1 mapping, please report this and delete your $DB_HOME directory!\n";#d# 234 DC::error "FATAL: facemap is not a 1:1 mapping, please report this and delete your $DB_HOME directory!\n";#d#
85 }#d# 235 }#d#
86 });
87 sync;
88 } 236 };
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} 237}
97 238
98package CFPlus::DB::Server; 239package DC::DB::Server;
99 240
100use strict; 241use strict;
101 242
243use EV ();
102use Fcntl; 244use 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}
144 245
145our %CB; 246our %CB;
146our $FH; 247our $FH;
147our $ID = "aaa0"; 248our $ID = "aaa0";
148our ($fh_r_watcher, $fh_w_watcher); 249our ($fh_r_watcher, $fh_w_watcher);
149our $sync_timer; 250our $sync_timer;
150our $write_buf; 251our $write_buf;
151our $read_buf; 252our $read_buf;
152 253
153our $SYNC = EV::timer_ns 0, 60, sub {
154 $_[0]->stop;
155 CFPlus::DB::Server::req (sync => sub { });
156};
157
158sub fh_write { 254sub fh_write {
159 my $len = syswrite $FH, $write_buf; 255 my $len = syswrite $FH, $write_buf;
160 256
161 substr $write_buf, 0, $len, ""; 257 substr $write_buf, 0, $len, "";
162 258
… …
205 my $id = ++$ID; 301 my $id = ++$ID;
206 $write_buf .= pack "N/a*", Storable::freeze [$id, $type, @args]; 302 $write_buf .= pack "N/a*", Storable::freeze [$id, $type, @args];
207 $CB{$id} = $cb; 303 $CB{$id} = $cb;
208 304
209 $fh_w_watcher->start; 305 $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} 306}
286 307
287sub do_unlink { 308sub do_unlink {
288 unlink $_[0]; 309 unlink $_[0];
289} 310}
… …
344 365
345 print { $LOG_FH{$path} } "$ts $line\n" 366 print { $LOG_FH{$path} } "$ts $line\n"
346} 367}
347 368
348sub run { 369sub run {
349 ($FH, my $fh) = CFPlus::socketpipe; 370 ($FH, my $fh) = DC::socketpipe;
350 371
351 my $oldfh = select $FH; $| = 1; select $oldfh; 372 my $oldfh = select $FH; $| = 1; select $oldfh;
352 my $oldfh = select $fh; $| = 1; select $oldfh; 373 my $oldfh = select $fh; $| = 1; select $oldfh;
353 374
354 my $pid = fork; 375 my $pid = fork;
355 376
356 if (defined $pid && !$pid) { 377 if (defined $pid && !$pid) {
357 local $SIG{QUIT}; 378 local $SIG{QUIT} = "IGNORE";
358 local $SIG{__DIE__}; 379 local $SIG{__DIE__};
359 local $SIG{__WARN__}; 380 local $SIG{__WARN__};
360 eval { 381 eval {
361 close $FH; 382 close $FH;
362
363 unless (eval { open_db }) {
364 eval { File::Path::rmtree $DB_HOME };
365 open_db;
366 }
367 383
368 while () { 384 while () {
369 4 == read $fh, my $len, 4 385 4 == read $fh, my $len, 4
370 or last; 386 or last;
371 $len = unpack "N", $len; 387 $len = unpack "N", $len;
… …
373 or die "unexpected eof while reading request"; 389 or die "unexpected eof while reading request";
374 390
375 $req = Storable::thaw $req; 391 $req = Storable::thaw $req;
376 392
377 my ($id, $type, @args) = @$req; 393 my ($id, $type, @args) = @$req;
378 my $cb = CFPlus::DB::Server->can ("do_$type") 394 my $cb = DC::DB::Server->can ("do_$type")
379 or die "$type: unknown database request type\n"; 395 or die "$type: unknown database request type\n";
380 my $res = pack "N/a*", Storable::freeze [$id, $cb->(@args)]; 396 my $res = pack "N/a*", Storable::freeze [$id, $cb->(@args)];
381 (syswrite $fh, $res) == length $res 397 (syswrite $fh, $res) == length $res
382 or die "DB::write: $!"; 398 or die "DB::write: $!";
383 } 399 }
384 }; 400 };
385 401
386 my $error = $@; 402 my $error = $@;
387 403
388 eval { 404 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; 405 Storable::store_fd [die => $error], $fh;
395 }; 406 };
396 407
408 warn $error
409 if $error;
410
397 CFPlus::_exit 0; 411 DC::_exit 0;
398 } 412 }
399 413
400 close $fh; 414 close $fh;
401 CFPlus::fh_nonblocking $FH, 1; 415 DC::fh_nonblocking $FH, 1;
402 416
403 $CB{die} = sub { die shift }; 417 $CB{die} = sub { die shift };
404 418
405 $fh_r_watcher = EV::io $FH, EV::READ , \&fh_read; 419 $fh_r_watcher = EV::io $FH, EV::READ , \&fh_read;
406 $fh_w_watcher = EV::io $FH, EV::WRITE, \&fh_write; 420 $fh_w_watcher = EV::io $FH, EV::WRITE, \&fh_write;
407 $SYNC->again unless $SYNC->is_active;
408} 421}
409 422
410sub stop { 423sub stop {
411 close $FH; 424 close $FH;
412} 425}

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