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Comparing deliantra/Deliantra-Client/DC/DB.pm (file contents):
Revision 1.15 by root, Mon Aug 6 02:11:45 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 Event (); 23use BDB;
24 24
25use CFPlus; 25use DC;
26 26
27our $DB_HOME = "$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($$$$) {
123 my ($db, $key, $data, $cb) = @_;
124
125 db_put table $db, undef, $key, $data, 0, sub {
126 $cb->($!);
127 $SYNC->again unless $SYNC->is_active;
128 };
129}
130
131sub do_table {
132 my ($db, $cb) = @_;
133
134 $db = table $db;
135
136 my $cursor = $db->cursor;
137 my %kv;
138
139 for (;;) {
140 db_c_get $cursor, my $k, my $v, BDB::NEXT;
141 last if $!;
142 $kv{$k} = $v;
143 }
144
145 $cb->(\%kv);
146}
147
148sub do_get_tile_id {
149 my ($name, $cb) = @_;
150
151 my $table = table "facemap";
152 my $id;
153
154 db_get $table, undef, $name, $id, 0;
155 return $cb->($id) unless $!;
156
157 for (1..100) {
158 my $txn = $DB_ENV->txn_begin;
159 db_get $table, $txn, id => $id, 0;
160
161 $id = 64 if $id < 64;
162
163 ++$id;
164
165 db_put $table, $txn, id => $id, 0;
166 db_txn_finish $txn;
167
168 $SYNC->again unless $SYNC->is_active;
169
170 return $cb->($id) unless $!;
171
172 select undef, undef, undef, 0.01 * rand;
173 }
174
175 die "maximum number of transaction retries reached - database problems?";
176}
177
178sub get_tile_id_sync($) {
179 my ($name) = @_;
180
181 $tilemap->{$name} ||= do {
182 my $id;
183 do_get_tile_id $name, sub {
184 $id = $_[0];
185 };
186 BDB::flush;
187 $id
188 }
189}
190
191#############################################################################
28 192
29sub path_of_res($) { 193sub path_of_res($) {
30 utf8::downgrade $_[0]; # bug in unpack "H*" 194 utf8::downgrade $_[0]; # bug in unpack "H*"
31 "$DB_HOME/res-data-" . unpack "H*", $_[0] 195 "$DB_HOME/res-data-" . unpack "H*", $_[0]
32} 196}
33 197
34sub sync { 198sub sync {
35 # for debugging 199 # for debugging
36 #CFPlus::DB::Server::req (sync => sub { }); 200 #DC::DB::Server::req (sync => sub { });
37 CFPlus::DB::Server::sync (); 201 DC::DB::Server::sync ();
38}
39
40sub exists($$$) {
41 CFPlus::DB::Server::req (exists => @_);
42}
43
44sub get($$$) {
45 CFPlus::DB::Server::req (get => @_);
46}
47
48sub put($$$$) {
49 CFPlus::DB::Server::req (put => @_);
50} 202}
51 203
52sub unlink($$) { 204sub unlink($$) {
53 CFPlus::DB::Server::req (unlink => @_); 205 DC::DB::Server::req (unlink => @_);
206}
207
208sub read_file($$) {
209 DC::DB::Server::req (read_file => @_);
54} 210}
55 211
56sub write_file($$$) { 212sub write_file($$$) {
57 CFPlus::DB::Server::req (write_file => @_); 213 DC::DB::Server::req (write_file => @_);
58} 214}
59 215
60sub prefetch_file($$$) { 216sub prefetch_file($$$) {
61 CFPlus::DB::Server::req (prefetch_file => @_); 217 DC::DB::Server::req (prefetch_file => @_);
62} 218}
63 219
64sub logprint($$$) { 220sub logprint($$$) {
65 CFPlus::DB::Server::req (logprint => @_); 221 DC::DB::Server::req (logprint => @_);
66} 222}
67 223
68our $tilemap; 224#############################################################################
69 225
70sub get_tile_id_sync($) {
71 my ($hash) = @_;
72
73 # fetch the full face table first 226# fetch the full face table first
74 unless ($tilemap) { 227unless ($tilemap) {
75 CFPlus::DB::Server::req (table => facemap => sub { $tilemap = $_[0] }); 228 do_table facemap => sub {
76 sync; 229 $tilemap = $_[0];
230 delete $tilemap->{id};
231 my %maptile = reverse %$tilemap;#d#
232 if ((scalar keys %$tilemap) != (scalar keys %maptile)) {#d#
233 $tilemap = { };#d#
234 DC::error "FATAL: facemap is not a 1:1 mapping, please report this and delete your $DB_HOME directory!\n";#d#
235 }#d#
77 } 236 };
78
79 $tilemap->{$hash} ||= do {
80 my $id;
81 CFPlus::DB::Server::req (get_tile_id => $hash, sub { $id = $_[0] });
82 sync;
83 $id
84 }
85} 237}
86 238
87package CFPlus::DB::Server; 239package DC::DB::Server;
88 240
89use strict; 241use strict;
90 242
243use EV ();
91use Fcntl; 244use Fcntl;
92use BerkeleyDB;
93
94our $DB_ENV;
95our $DB_STATE;
96our %DB_TABLE;
97
98sub open_db {
99 mkdir $DB_HOME, 0777;
100 my $recover = $BerkeleyDB::db_version >= 4.4
101 ? eval "DB_REGISTER | DB_RECOVER"
102 : 0;
103
104 $DB_ENV = new BerkeleyDB::Env
105 -Home => $DB_HOME,
106 -Cachesize => 8_000_000,
107 -ErrFile => "$DB_HOME/errorlog.txt",
108# -ErrPrefix => "DATABASE",
109 -Verbose => 1,
110 -Flags => DB_CREATE | DB_RECOVER | DB_INIT_MPOOL | DB_INIT_LOCK | DB_INIT_TXN | $recover,
111 -SetFlags => DB_AUTO_COMMIT | DB_LOG_AUTOREMOVE,
112 or die "unable to create/open database home $DB_HOME: $BerkeleyDB::Error";
113
114 1
115}
116
117sub table($) {
118 $DB_TABLE{$_[0]} ||= do {
119 my ($table) = @_;
120
121 $table =~ s/([^a-zA-Z0-9_\-])/sprintf "=%x=", ord $1/ge;
122
123 new BerkeleyDB::Btree
124 -Env => $DB_ENV,
125 -Filename => $table,
126# -Filename => "database",
127# -Subname => $table,
128 -Property => DB_CHKSUM,
129 -Flags => DB_CREATE | DB_UPGRADE,
130 or die "unable to create/open database table $_[0]: $BerkeleyDB::Error"
131 }
132}
133 245
134our %CB; 246our %CB;
135our $FH; 247our $FH;
136our $ID = "aaa0"; 248our $ID = "aaa0";
137our ($fh_r_watcher, $fh_w_watcher); 249our ($fh_r_watcher, $fh_w_watcher);
138our $sync_timer; 250our $sync_timer;
139our $write_buf; 251our $write_buf;
140our $read_buf; 252our $read_buf;
141 253
142our $SYNC = Event->idle (min => 5, max => 60, parked => 1, cb => sub {
143 CFPlus::DB::Server::req (sync => sub { });
144 $_[0]->w->stop;
145});
146
147sub fh_write { 254sub fh_write {
148 my $len = syswrite $FH, $write_buf; 255 my $len = syswrite $FH, $write_buf;
149 256
150 substr $write_buf, 0, $len, ""; 257 substr $write_buf, 0, $len, "";
151 258
… …
194 my $id = ++$ID; 301 my $id = ++$ID;
195 $write_buf .= pack "N/a*", Storable::freeze [$id, $type, @args]; 302 $write_buf .= pack "N/a*", Storable::freeze [$id, $type, @args];
196 $CB{$id} = $cb; 303 $CB{$id} = $cb;
197 304
198 $fh_w_watcher->start; 305 $fh_w_watcher->start;
199 $SYNC->start;
200}
201
202sub do_sync {
203 $DB_ENV->txn_checkpoint (0, 0, 0);
204 ()
205}
206
207sub do_exists {
208 my ($db, $key) = @_;
209
210 utf8::downgrade $key;
211 my $data;
212 (table $db)->db_get ($key, $data) == 0
213 ? length $data
214 : ()
215}
216
217sub do_get {
218 my ($db, $key) = @_;
219
220 utf8::downgrade $key;
221 my $data;
222 (table $db)->db_get ($key, $data) == 0
223 ? $data
224 : ()
225}
226
227sub do_put {
228 my ($db, $key, $data) = @_;
229
230 utf8::downgrade $key;
231 utf8::downgrade $data;
232 (table $db)->db_put ($key => $data)
233}
234
235sub do_table {
236 my ($db) = @_;
237
238 $db = table $db;
239
240 my $cursor = $db->db_cursor;
241 my %kv;
242 my ($k, $v);
243 $kv{$k} = $v while $cursor->c_get ($k, $v, BerkeleyDB::DB_NEXT) == 0;
244
245 \%kv
246}
247
248sub do_get_tile_id {
249 my ($hash) = @_;
250
251 my $id;
252 my $table = table "facemap";
253
254 return $id
255 if $table->db_get ($hash, $id) == 0;
256
257 for (1..100) {
258 my $txn = $DB_ENV->txn_begin;
259 my $status = $table->db_get (id => $id);
260 if ($status == 0 || $status == BerkeleyDB::DB_NOTFOUND) {
261 $id = ($id || 64) + 1;
262 if ($table->db_put (id => $id) == 0
263 && $table->db_put ($hash => $id) == 0) {
264 $txn->txn_commit;
265
266 return $id;
267 }
268 }
269 $txn->txn_abort;
270 }
271
272 die "maximum number of transaction retries reached - database problems?";
273} 306}
274 307
275sub do_unlink { 308sub do_unlink {
276 unlink $_[0]; 309 unlink $_[0];
277} 310}
278 311
312sub do_read_file {
313 my ($path) = @_;
314
315 utf8::downgrade $path;
316 open my $fh, "<:raw", $path
317 or return;
318 sysread $fh, my $buf, -s $fh;
319
320 $buf
321}
322
279sub do_write_file { 323sub do_write_file {
280 my ($file, $data) = @_; 324 my ($path, $data) = @_;
281 325
282 utf8::downgrade $file; 326 utf8::downgrade $path;
283 utf8::downgrade $data; 327 utf8::downgrade $data;
284 open my $fh, ">:raw", $file 328 open my $fh, ">:raw", $path
285 or return; 329 or return;
286 print $fh $data; 330 syswrite $fh, $data;
287 close $fh; 331 close $fh;
288 332
289 1 333 1
290} 334}
291 335
292sub do_prefetch_file { 336sub do_prefetch_file {
293 my ($file, $size) = @_; 337 my ($path, $size) = @_;
294 338
295 utf8::downgrade $file; 339 utf8::downgrade $path;
296 open my $fh, "<:raw", $file 340 open my $fh, "<:raw", $path
297 or return; 341 or return;
298 sysread $fh, my $buf, $size; 342 sysread $fh, my $buf, $size;
299 343
300 1 344 1
301} 345}
… …
321 365
322 print { $LOG_FH{$path} } "$ts $line\n" 366 print { $LOG_FH{$path} } "$ts $line\n"
323} 367}
324 368
325sub run { 369sub run {
326 ($FH, my $fh) = CFPlus::socketpipe; 370 ($FH, my $fh) = DC::socketpipe;
327 371
328 my $oldfh = select $FH; $| = 1; select $oldfh; 372 my $oldfh = select $FH; $| = 1; select $oldfh;
329 my $oldfh = select $fh; $| = 1; select $oldfh; 373 my $oldfh = select $fh; $| = 1; select $oldfh;
330 374
331 my $pid = fork; 375 my $pid = fork;
332 376
333 if (defined $pid && !$pid) { 377 if (defined $pid && !$pid) {
334 local $SIG{QUIT}; 378 local $SIG{QUIT} = "IGNORE";
335 local $SIG{__DIE__}; 379 local $SIG{__DIE__};
336 local $SIG{__WARN__}; 380 local $SIG{__WARN__};
337 eval { 381 eval {
338 close $FH; 382 close $FH;
339
340 unless (eval { open_db }) {
341 eval { File::Path::rmtree $DB_HOME };
342 open_db;
343 }
344 383
345 while () { 384 while () {
346 4 == read $fh, my $len, 4 385 4 == read $fh, my $len, 4
347 or last; 386 or last;
348 $len = unpack "N", $len; 387 $len = unpack "N", $len;
… …
350 or die "unexpected eof while reading request"; 389 or die "unexpected eof while reading request";
351 390
352 $req = Storable::thaw $req; 391 $req = Storable::thaw $req;
353 392
354 my ($id, $type, @args) = @$req; 393 my ($id, $type, @args) = @$req;
355 my $cb = CFPlus::DB::Server->can ("do_$type") 394 my $cb = DC::DB::Server->can ("do_$type")
356 or die "$type: unknown database request type\n"; 395 or die "$type: unknown database request type\n";
357 my $res = pack "N/a*", Storable::freeze [$id, $cb->(@args)]; 396 my $res = pack "N/a*", Storable::freeze [$id, $cb->(@args)];
358 (syswrite $fh, $res) == length $res 397 (syswrite $fh, $res) == length $res
359 or die; 398 or die "DB::write: $!";
360 } 399 }
361 }; 400 };
362 401
363 my $error = $@; 402 my $error = $@;
364 403
365 eval { 404 eval {
366 undef %DB_TABLE;
367 undef $DB_ENV;
368
369 Storable::store_fd [die => $error], $fh; 405 Storable::store_fd [die => $error], $fh;
370 }; 406 };
371 407
408 warn $error
409 if $error;
410
372 CFPlus::_exit 0; 411 DC::_exit 0;
373 } 412 }
374 413
375 close $fh; 414 close $fh;
376 CFPlus::fh_nonblocking $FH, 1; 415 DC::fh_nonblocking $FH, 1;
377 416
378 $CB{die} = sub { die shift }; 417 $CB{die} = sub { die shift };
379 418
380 $fh_r_watcher = Event->io (fd => $FH, poll => 'r', nice => 1, cb => \&fh_read); 419 $fh_r_watcher = EV::io $FH, EV::READ , \&fh_read;
381 $fh_w_watcher = Event->io (fd => $FH, poll => 'w', nice => -1, parked => 1, cb => \&fh_write); 420 $fh_w_watcher = EV::io $FH, EV::WRITE, \&fh_write;
382 $SYNC->start;
383} 421}
384 422
385sub stop { 423sub stop {
386 close $FH; 424 close $FH;
387} 425}

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