ViewVC Help
View File | Revision Log | Show Annotations | Download File
/cvs/deliantra/Deliantra-Client/DC/DB.pm
(Generate patch)

Comparing deliantra/Deliantra-Client/DC/DB.pm (file contents):
Revision 1.14 by root, Sun Jul 29 19:32:29 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($$) {
53 CFPlus::DB::Server::req (unlink => @_); 198 DC::DB::Server::req (unlink => @_);
199}
200
201sub read_file($$) {
202 DC::DB::Server::req (read_file => @_);
54} 203}
55 204
56sub write_file($$$) { 205sub write_file($$$) {
57 CFPlus::DB::Server::req (write_file => @_); 206 DC::DB::Server::req (write_file => @_);
58} 207}
59 208
60sub prefetch_file($$$) { 209sub prefetch_file($$$) {
61 CFPlus::DB::Server::req (prefetch_file => @_); 210 DC::DB::Server::req (prefetch_file => @_);
62} 211}
63 212
64our $tilemap; 213sub logprint($$$) {
214 DC::DB::Server::req (logprint => @_);
215}
65 216
66sub get_tile_id_sync($) { 217#############################################################################
67 my ($hash) = @_;
68 218
69 # fetch the full face table first 219# fetch the full face table first
70 unless ($tilemap) { 220unless ($tilemap) {
71 CFPlus::DB::Server::req (table => facemap => sub { $tilemap = $_[0] }); 221 do_table facemap => sub {
72 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#
73 } 229 };
74
75 $tilemap->{$hash} ||= do {
76 my $id;
77 CFPlus::DB::Server::req (get_tile_id => $hash, sub { $id = $_[0] });
78 sync;
79 $id
80 }
81} 230}
82 231
83package CFPlus::DB::Server; 232package DC::DB::Server;
84 233
85use strict; 234use strict;
86 235
236use EV ();
87use Fcntl; 237use Fcntl;
88use BerkeleyDB;
89
90our $DB_ENV;
91our $DB_STATE;
92our %DB_TABLE;
93
94sub open_db {
95 mkdir $DB_HOME, 0777;
96 my $recover = $BerkeleyDB::db_version >= 4.4
97 ? eval "DB_REGISTER | DB_RECOVER"
98 : 0;
99
100 $DB_ENV = new BerkeleyDB::Env
101 -Home => $DB_HOME,
102 -Cachesize => 8_000_000,
103 -ErrFile => "$DB_HOME/errorlog.txt",
104# -ErrPrefix => "DATABASE",
105 -Verbose => 1,
106 -Flags => DB_CREATE | DB_RECOVER | DB_INIT_MPOOL | DB_INIT_LOCK | DB_INIT_TXN | $recover,
107 -SetFlags => DB_AUTO_COMMIT | DB_LOG_AUTOREMOVE,
108 or die "unable to create/open database home $DB_HOME: $BerkeleyDB::Error";
109
110 1
111}
112
113sub table($) {
114 $DB_TABLE{$_[0]} ||= do {
115 my ($table) = @_;
116
117 $table =~ s/([^a-zA-Z0-9_\-])/sprintf "=%x=", ord $1/ge;
118
119 new BerkeleyDB::Btree
120 -Env => $DB_ENV,
121 -Filename => $table,
122# -Filename => "database",
123# -Subname => $table,
124 -Property => DB_CHKSUM,
125 -Flags => DB_CREATE | DB_UPGRADE,
126 or die "unable to create/open database table $_[0]: $BerkeleyDB::Error"
127 }
128}
129 238
130our %CB; 239our %CB;
131our $FH; 240our $FH;
132our $ID = "aaa0"; 241our $ID = "aaa0";
133our ($fh_r_watcher, $fh_w_watcher); 242our ($fh_r_watcher, $fh_w_watcher);
134our $sync_timer; 243our $sync_timer;
135our $write_buf; 244our $write_buf;
136our $read_buf; 245our $read_buf;
137 246
138our $SYNC = Event->idle (min => 5, max => 60, parked => 1, cb => sub {
139 CFPlus::DB::Server::req (sync => sub { });
140 $_[0]->w->stop;
141});
142
143sub fh_write { 247sub fh_write {
144 my $len = syswrite $FH, $write_buf; 248 my $len = syswrite $FH, $write_buf;
145 249
146 substr $write_buf, 0, $len, ""; 250 substr $write_buf, 0, $len, "";
147 251
… …
190 my $id = ++$ID; 294 my $id = ++$ID;
191 $write_buf .= pack "N/a*", Storable::freeze [$id, $type, @args]; 295 $write_buf .= pack "N/a*", Storable::freeze [$id, $type, @args];
192 $CB{$id} = $cb; 296 $CB{$id} = $cb;
193 297
194 $fh_w_watcher->start; 298 $fh_w_watcher->start;
195 $SYNC->start;
196}
197
198sub do_sync {
199 $DB_ENV->txn_checkpoint (0, 0, 0);
200 ()
201}
202
203sub do_exists {
204 my ($db, $key) = @_;
205
206 utf8::downgrade $key;
207 my $data;
208 (table $db)->db_get ($key, $data) == 0
209 ? length $data
210 : ()
211}
212
213sub do_get {
214 my ($db, $key) = @_;
215
216 utf8::downgrade $key;
217 my $data;
218 (table $db)->db_get ($key, $data) == 0
219 ? $data
220 : ()
221}
222
223sub do_put {
224 my ($db, $key, $data) = @_;
225
226 utf8::downgrade $key;
227 utf8::downgrade $data;
228 (table $db)->db_put ($key => $data)
229}
230
231sub do_table {
232 my ($db) = @_;
233
234 $db = table $db;
235
236 my $cursor = $db->db_cursor;
237 my %kv;
238 my ($k, $v);
239 $kv{$k} = $v while $cursor->c_get ($k, $v, BerkeleyDB::DB_NEXT) == 0;
240
241 \%kv
242}
243
244sub do_get_tile_id {
245 my ($hash) = @_;
246
247 my $id;
248 my $table = table "facemap";
249
250 return $id
251 if $table->db_get ($hash, $id) == 0;
252
253 for (1..100) {
254 my $txn = $DB_ENV->txn_begin;
255 my $status = $table->db_get (id => $id);
256 if ($status == 0 || $status == BerkeleyDB::DB_NOTFOUND) {
257 $id = ($id || 64) + 1;
258 if ($table->db_put (id => $id) == 0
259 && $table->db_put ($hash => $id) == 0) {
260 $txn->txn_commit;
261
262 return $id;
263 }
264 }
265 $txn->txn_abort;
266 }
267
268 die "maximum number of transaction retries reached - database problems?";
269} 299}
270 300
271sub do_unlink { 301sub do_unlink {
272 unlink $_[0]; 302 unlink $_[0];
273} 303}
274 304
305sub do_read_file {
306 my ($path) = @_;
307
308 utf8::downgrade $path;
309 open my $fh, "<:raw", $path
310 or return;
311 sysread $fh, my $buf, -s $fh;
312
313 $buf
314}
315
275sub do_write_file { 316sub do_write_file {
276 my ($file, $data) = @_; 317 my ($path, $data) = @_;
277 318
278 utf8::downgrade $file; 319 utf8::downgrade $path;
279 utf8::downgrade $data; 320 utf8::downgrade $data;
280 open my $fh, ">:raw", $file 321 open my $fh, ">:raw", $path
281 or return; 322 or return;
282 print $fh $data; 323 syswrite $fh, $data;
283 close $fh; 324 close $fh;
284 325
285 1 326 1
286} 327}
287 328
288sub do_prefetch_file { 329sub do_prefetch_file {
289 my ($file, $size) = @_; 330 my ($path, $size) = @_;
290 331
291 utf8::downgrade $file; 332 utf8::downgrade $path;
292 open my $fh, "<:raw", $file 333 open my $fh, "<:raw", $path
293 or return; 334 or return;
294 sysread $fh, my $buf, $size; 335 sysread $fh, my $buf, $size;
295 336
296 1 337 1
297} 338}
298 339
340our %LOG_FH;
341
342sub do_logprint {
343 my ($path, $line) = @_;
344
345 $LOG_FH{$path} ||= do {
346 open my $fh, ">>:utf8", $path
347 or warn "Couldn't open logfile $path: $!";
348
349 $fh->autoflush (1);
350
351 $fh
352 };
353
354 my ($sec, $min, $hour, $mday, $mon, $year) = localtime time;
355
356 my $ts = sprintf "%04d-%02d-%02d %02d:%02d:%02d",
357 $year + 1900, $mon + 1, $mday, $hour, $min, $sec;
358
359 print { $LOG_FH{$path} } "$ts $line\n"
360}
361
299sub run { 362sub run {
300 ($FH, my $fh) = CFPlus::socketpipe; 363 ($FH, my $fh) = DC::socketpipe;
301 364
302 my $oldfh = select $FH; $| = 1; select $oldfh; 365 my $oldfh = select $FH; $| = 1; select $oldfh;
303 my $oldfh = select $fh; $| = 1; select $oldfh; 366 my $oldfh = select $fh; $| = 1; select $oldfh;
304 367
305 my $pid = fork; 368 my $pid = fork;
306 369
307 if (defined $pid && !$pid) { 370 if (defined $pid && !$pid) {
371 local $SIG{QUIT} = "IGNORE";
308 local $SIG{__DIE__}; 372 local $SIG{__DIE__};
373 local $SIG{__WARN__};
309 eval { 374 eval {
310 close $FH; 375 close $FH;
311
312 unless (eval { open_db }) {
313 eval { File::Path::rmtree $DB_HOME };
314 open_db;
315 }
316 376
317 while () { 377 while () {
318 4 == read $fh, my $len, 4 378 4 == read $fh, my $len, 4
319 or last; 379 or last;
320 $len = unpack "N", $len; 380 $len = unpack "N", $len;
… …
322 or die "unexpected eof while reading request"; 382 or die "unexpected eof while reading request";
323 383
324 $req = Storable::thaw $req; 384 $req = Storable::thaw $req;
325 385
326 my ($id, $type, @args) = @$req; 386 my ($id, $type, @args) = @$req;
327 my $cb = CFPlus::DB::Server->can ("do_$type") 387 my $cb = DC::DB::Server->can ("do_$type")
328 or die "$type: unknown database request type\n"; 388 or die "$type: unknown database request type\n";
329 my $res = pack "N/a*", Storable::freeze [$id, $cb->(@args)]; 389 my $res = pack "N/a*", Storable::freeze [$id, $cb->(@args)];
330 (syswrite $fh, $res) == length $res 390 (syswrite $fh, $res) == length $res
331 or die; 391 or die "DB::write: $!";
332 } 392 }
333 }; 393 };
334 394
335 my $error = $@; 395 my $error = $@;
336 396
337 eval { 397 eval {
338 undef %DB_TABLE;
339 undef $DB_ENV;
340
341 Storable::store_fd [die => $error], $fh; 398 Storable::store_fd [die => $error], $fh;
342 }; 399 };
343 400
401 warn $error
402 if $error;
403
344 CFPlus::_exit 0; 404 DC::_exit 0;
345 } 405 }
346 406
347 close $fh; 407 close $fh;
348 CFPlus::fh_nonblocking $FH, 1; 408 DC::fh_nonblocking $FH, 1;
349 409
350 $CB{die} = sub { die shift }; 410 $CB{die} = sub { die shift };
351 411
352 $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;
353 $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;
354 $SYNC->start;
355} 414}
356 415
357sub stop { 416sub stop {
358 close $FH; 417 close $FH;
359} 418}

Diff Legend

– Removed lines
+ Added lines
< Changed lines
> Changed lines