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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 1.31 by root, Thu Jan 10 23:02:19 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;
42
43our $DB_ENV;
44our $DB_STATE;
45our %DB_TABLE;
46
47sub open_db {
48 mkdir $DB_HOME, 0777;
49
50 $DB_ENV = db_env_create;
51
52 $DB_ENV->set_errfile (\*STDERR);
53 $DB_ENV->set_msgfile (\*STDERR);
54 $DB_ENV->set_verbose (-1, 1);
55
56 $DB_ENV->set_flags (BDB::AUTO_COMMIT | BDB::LOG_AUTOREMOVE | BDB::TXN_WRITE_NOSYNC);
57 $DB_ENV->set_cachesize (0, 2048 * 1024, 0);
58
59 db_env_open $DB_ENV, $DB_HOME,
60 BDB::CREATE | BDB::REGISTER | BDB::RECOVER | BDB::INIT_MPOOL | BDB::INIT_LOCK | BDB::INIT_TXN,
61 0666;
62
63 $! and die "cannot open database environment $DB_HOME: " . BDB::strerror;
64
65 1
66}
67
68sub table($) {
69 $DB_TABLE{$_[0]} ||= do {
70 my ($table) = @_;
71
72 $table =~ s/([^a-zA-Z0-9_\-])/sprintf "=%x=", ord $1/ge;
73
74 my $db = db_create $DB_ENV;
75 $db->set_flags (BDB::CHKSUM);
76
77 db_open $db, undef, $table, undef, BDB::BTREE,
78 BDB::AUTO_COMMIT | BDB::CREATE | BDB::READ_UNCOMMITTED, 0666;
79
80 $! and "unable to open/create database table $_[0]: ". BDB::strerror;
81
82 $db
83 }
84}
85
86#############################################################################
87
88unless (eval { open_db }) {
89 warn "$@";#d#
90 eval { File::Path::rmtree $DB_HOME };
91 open_db;
92}
93
94our $WATCHER = EV::io BDB::poll_fileno, EV::READ, \&BDB::poll_cb;
95
96our $SYNC = EV::timer_ns 0, 60, sub {
97 $_[0]->stop;
98 db_env_txn_checkpoint $DB_ENV, 0, 0, 0, sub { };
99};
100
101our $tilemap;
102
103sub exists($$$) {
104 my ($db, $key, $cb) = @_;
105
106 my $data;
107 db_get table $db, undef, $key, $data, 0, sub {
108 $cb->($! ? () : length $data);
109 };
110}
111
112sub get($$$) {
113 my ($db, $key, $cb) = @_;
114
115 my $data;
116 db_get table $db, undef, $key, $data, 0, sub {
117 $cb->($! ? () : $data);
118 };
119}
120
121sub put($$$$) {
122 my ($db, $key, $data, $cb) = @_;
123
124 db_put table $db, undef, $key, $data, 0, sub {
125 $cb->($!);
126 $SYNC->again unless $SYNC->is_active;
127 };
128}
129
130sub do_table {
131 my ($db, $cb) = @_;
132
133 $db = table $db;
134
135 my $cursor = $db->cursor;
136 my %kv;
137
138 for (;;) {
139 db_c_get $cursor, my $k, my $v, BDB::NEXT;
140 last if $!;
141 $kv{$k} = $v;
142 }
143
144 $cb->(\%kv);
145}
146
147sub do_get_tile_id {
148 my ($name, $cb) = @_;
149
150 my $table = table "facemap";
151 my $id;
152
153 db_get $table, undef, $name, $id, 0;
154 return $cb->($id) unless $!;
155
156 for (1..100) {
157 my $txn = $DB_ENV->txn_begin;
158 db_get $table, $txn, id => $id, 0;
159
160 $id = 64 if $id < 64;
161
162 ++$id;
163
164 db_put $table, $txn, id => $id, 0;
165 db_txn_finish $txn;
166
167 $SYNC->again unless $SYNC->is_active;
168
169 return $cb->($id) unless $!;
170
171 select undef, undef, undef, 0.01 * rand;
172 }
173
174 die "maximum number of transaction retries reached - database problems?";
175}
176
177sub get_tile_id_sync($) {
178 my ($name) = @_;
179
180 $tilemap->{$name} ||= do {
181 my $id;
182 do_get_tile_id $name, sub {
183 $id = $_[0];
184 };
185 BDB::flush;
186 $id
187 }
188}
189
190#############################################################################
28 191
29sub path_of_res($) { 192sub path_of_res($) {
30 utf8::downgrade $_[0]; # bug in unpack "H*" 193 utf8::downgrade $_[0]; # bug in unpack "H*"
31 "$DB_HOME/res-data-" . unpack "H*", $_[0] 194 "$DB_HOME/res-data-" . unpack "H*", $_[0]
32} 195}
33 196
34sub sync { 197sub sync {
35 # for debugging 198 # for debugging
36 #CFPlus::DB::Server::req (sync => sub { }); 199 #DC::DB::Server::req (sync => sub { });
37 CFPlus::DB::Server::sync (); 200 DC::DB::Server::sync ();
38}
39
40sub exists($$$) {
41 CFPlus::DB::Server::req (exists => @_);
42}
43
44sub get($$$) {
45 CFPlus::DB::Server::req (get => @_);
46}
47
48sub put($$$$) {
49 CFPlus::DB::Server::req (put => @_);
50} 201}
51 202
52sub unlink($$) { 203sub unlink($$) {
53 CFPlus::DB::Server::req (unlink => @_); 204 DC::DB::Server::req (unlink => @_);
205}
206
207sub read_file($$) {
208 DC::DB::Server::req (read_file => @_);
54} 209}
55 210
56sub write_file($$$) { 211sub write_file($$$) {
57 CFPlus::DB::Server::req (write_file => @_); 212 DC::DB::Server::req (write_file => @_);
58} 213}
59 214
60sub prefetch_file($$$) { 215sub prefetch_file($$$) {
61 CFPlus::DB::Server::req (prefetch_file => @_); 216 DC::DB::Server::req (prefetch_file => @_);
62} 217}
63 218
64sub logprint($$$) { 219sub logprint($$$) {
65 CFPlus::DB::Server::req (logprint => @_); 220 DC::DB::Server::req (logprint => @_);
66} 221}
67 222
68our $tilemap; 223#############################################################################
69 224
70sub get_tile_id_sync($) {
71 my ($hash) = @_;
72
73 # fetch the full face table first 225# fetch the full face table first
74 unless ($tilemap) { 226unless ($tilemap) {
75 CFPlus::DB::Server::req (table => facemap => sub { $tilemap = $_[0] }); 227 do_table facemap => sub {
76 sync; 228 $tilemap = $_[0];
229 delete $tilemap->{id};
230 my %maptile = reverse %$tilemap;#d#
231 if ((scalar keys %$tilemap) != (scalar keys %maptile)) {#d#
232 $tilemap = { };#d#
233 DC::error "FATAL: facemap is not a 1:1 mapping, please report this and delete your $DB_HOME directory!\n";#d#
234 }#d#
77 } 235 };
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} 236}
86 237
87package CFPlus::DB::Server; 238package DC::DB::Server;
88 239
89use strict; 240use strict;
90 241
242use EV ();
91use Fcntl; 243use 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}
133 244
134our %CB; 245our %CB;
135our $FH; 246our $FH;
136our $ID = "aaa0"; 247our $ID = "aaa0";
137our ($fh_r_watcher, $fh_w_watcher); 248our ($fh_r_watcher, $fh_w_watcher);
138our $sync_timer; 249our $sync_timer;
139our $write_buf; 250our $write_buf;
140our $read_buf; 251our $read_buf;
141 252
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 { 253sub fh_write {
148 my $len = syswrite $FH, $write_buf; 254 my $len = syswrite $FH, $write_buf;
149 255
150 substr $write_buf, 0, $len, ""; 256 substr $write_buf, 0, $len, "";
151 257
… …
194 my $id = ++$ID; 300 my $id = ++$ID;
195 $write_buf .= pack "N/a*", Storable::freeze [$id, $type, @args]; 301 $write_buf .= pack "N/a*", Storable::freeze [$id, $type, @args];
196 $CB{$id} = $cb; 302 $CB{$id} = $cb;
197 303
198 $fh_w_watcher->start; 304 $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} 305}
274 306
275sub do_unlink { 307sub do_unlink {
276 unlink $_[0]; 308 unlink $_[0];
277} 309}
278 310
311sub do_read_file {
312 my ($path) = @_;
313
314 utf8::downgrade $path;
315 open my $fh, "<:raw", $path
316 or return;
317 sysread $fh, my $buf, -s $fh;
318
319 $buf
320}
321
279sub do_write_file { 322sub do_write_file {
280 my ($file, $data) = @_; 323 my ($path, $data) = @_;
281 324
282 utf8::downgrade $file; 325 utf8::downgrade $path;
283 utf8::downgrade $data; 326 utf8::downgrade $data;
284 open my $fh, ">:raw", $file 327 open my $fh, ">:raw", $path
285 or return; 328 or return;
286 print $fh $data; 329 syswrite $fh, $data;
287 close $fh; 330 close $fh;
288 331
289 1 332 1
290} 333}
291 334
292sub do_prefetch_file { 335sub do_prefetch_file {
293 my ($file, $size) = @_; 336 my ($path, $size) = @_;
294 337
295 utf8::downgrade $file; 338 utf8::downgrade $path;
296 open my $fh, "<:raw", $file 339 open my $fh, "<:raw", $path
297 or return; 340 or return;
298 sysread $fh, my $buf, $size; 341 sysread $fh, my $buf, $size;
299 342
300 1 343 1
301} 344}
… …
321 364
322 print { $LOG_FH{$path} } "$ts $line\n" 365 print { $LOG_FH{$path} } "$ts $line\n"
323} 366}
324 367
325sub run { 368sub run {
326 ($FH, my $fh) = CFPlus::socketpipe; 369 ($FH, my $fh) = DC::socketpipe;
327 370
328 my $oldfh = select $FH; $| = 1; select $oldfh; 371 my $oldfh = select $FH; $| = 1; select $oldfh;
329 my $oldfh = select $fh; $| = 1; select $oldfh; 372 my $oldfh = select $fh; $| = 1; select $oldfh;
330 373
331 my $pid = fork; 374 my $pid = fork;
332 375
333 if (defined $pid && !$pid) { 376 if (defined $pid && !$pid) {
334 local $SIG{QUIT}; 377 local $SIG{QUIT} = "IGNORE";
335 local $SIG{__DIE__}; 378 local $SIG{__DIE__};
336 local $SIG{__WARN__}; 379 local $SIG{__WARN__};
337 eval { 380 eval {
338 close $FH; 381 close $FH;
339
340 unless (eval { open_db }) {
341 eval { File::Path::rmtree $DB_HOME };
342 open_db;
343 }
344 382
345 while () { 383 while () {
346 4 == read $fh, my $len, 4 384 4 == read $fh, my $len, 4
347 or last; 385 or last;
348 $len = unpack "N", $len; 386 $len = unpack "N", $len;
… …
350 or die "unexpected eof while reading request"; 388 or die "unexpected eof while reading request";
351 389
352 $req = Storable::thaw $req; 390 $req = Storable::thaw $req;
353 391
354 my ($id, $type, @args) = @$req; 392 my ($id, $type, @args) = @$req;
355 my $cb = CFPlus::DB::Server->can ("do_$type") 393 my $cb = DC::DB::Server->can ("do_$type")
356 or die "$type: unknown database request type\n"; 394 or die "$type: unknown database request type\n";
357 my $res = pack "N/a*", Storable::freeze [$id, $cb->(@args)]; 395 my $res = pack "N/a*", Storable::freeze [$id, $cb->(@args)];
358 (syswrite $fh, $res) == length $res 396 (syswrite $fh, $res) == length $res
359 or die; 397 or die "DB::write: $!";
360 } 398 }
361 }; 399 };
362 400
363 my $error = $@; 401 my $error = $@;
364 402
365 eval { 403 eval {
366 undef %DB_TABLE;
367 undef $DB_ENV;
368
369 Storable::store_fd [die => $error], $fh; 404 Storable::store_fd [die => $error], $fh;
370 }; 405 };
371 406
407 warn $error
408 if $error;
409
372 CFPlus::_exit 0; 410 DC::_exit 0;
373 } 411 }
374 412
375 close $fh; 413 close $fh;
376 CFPlus::fh_nonblocking $FH, 1; 414 DC::fh_nonblocking $FH, 1;
377 415
378 $CB{die} = sub { die shift }; 416 $CB{die} = sub { die shift };
379 417
380 $fh_r_watcher = Event->io (fd => $FH, poll => 'r', nice => 1, cb => \&fh_read); 418 $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); 419 $fh_w_watcher = EV::io $FH, EV::WRITE, \&fh_write;
382 $SYNC->start;
383} 420}
384 421
385sub stop { 422sub stop {
386 close $FH; 423 close $FH;
387} 424}

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