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Comparing deliantra/Deliantra-Client/DC/DB.pm (file contents):
Revision 1.23 by root, Fri Nov 16 04:54:25 2007 UTC vs.
Revision 1.35 by root, Sun Mar 30 06:05:52 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 File::Path ();
20use Carp (); 21use Carp ();
21use Storable (); 22use Storable ();
22use Config; 23use Config;
24use BDB;
23 25
24use CFPlus; 26use DC;
25 27
26our $DB_HOME = "$Crossfire::VARDIR/cfplus-$BerkeleyDB::db_version-$Config{archname}"; 28our $ODBDIR = "cfplus-" . BDB::VERSION . "-$Config{archname}";
29our $DBDIR = "client-" . BDB::VERSION . "-$Config{archname}";
30our $DB_HOME = "$Deliantra::VARDIR/$DBDIR";
31
32unless (-d $DB_HOME) {
33 if (-d "$Deliantra::VARDIR/$ODBDIR") {
34 rename "$Deliantra::VARDIR/$ODBDIR", $DB_HOME;
35 print STDERR "INFO: moved old database from $Deliantra::VARDIR/$ODBDIR to $DB_HOME\n";
36 } elsif (-d "$Deliantra::OLDDIR/$ODBDIR") {
37 rename "$Deliantra::OLDDIR/$DBDIR", $DB_HOME;
38 print STDERR "INFO: moved old database from $Deliantra::OLDDIR/$ODBDIR to $DB_HOME\n";
39 } else {
40 File::Path::mkpath [$DB_HOME]
41 or die "unable to create database directory $DB_HOME: $!";
42 }
43}
44
45BDB::max_poll_time 0.03;
46BDB::max_parallel 1;
47
48our $DB_ENV;
49our $DB_STATE;
50our %DB_TABLE;
51our $TILE_SEQ;
52
53sub try_open_db {
54 File::Path::mkpath [$DB_HOME];
55
56 $DB_ENV = db_env_create;
57
58 $DB_ENV->set_errfile (\*STDERR);
59 $DB_ENV->set_msgfile (\*STDERR);
60 $DB_ENV->set_verbose (-1, 1);
61
62 $DB_ENV->set_flags (BDB::AUTO_COMMIT | BDB::LOG_AUTOREMOVE | BDB::TXN_WRITE_NOSYNC);
63 $DB_ENV->set_cachesize (0, 2048 * 1024, 0);
64
65 db_env_open $DB_ENV, $DB_HOME,
66 BDB::CREATE | BDB::REGISTER | BDB::RECOVER | BDB::INIT_MPOOL | BDB::INIT_LOCK | BDB::INIT_TXN,
67 0666;
68
69 $! and die "cannot open database environment $DB_HOME: " . BDB::strerror;
70
71 1
72}
73
74sub table($) {
75 $DB_TABLE{$_[0]} ||= do {
76 my ($table) = @_;
77
78 $table =~ s/([^a-zA-Z0-9_\-])/sprintf "=%x=", ord $1/ge;
79
80 my $db = db_create $DB_ENV;
81 $db->set_flags (BDB::CHKSUM);
82
83 db_open $db, undef, $table, undef, BDB::BTREE,
84 BDB::AUTO_COMMIT | BDB::CREATE | BDB::READ_UNCOMMITTED, 0666;
85
86 $! and "unable to open/create database table $_[0]: ". BDB::strerror;
87
88 $db
89 }
90}
91
92#############################################################################
93
94our $WATCHER;
95our $SYNC;
96our $facemap;
97
98sub exists($$$) {
99 my ($db, $key, $cb) = @_;
100
101 my $data;
102 db_get table $db, undef, $key, $data, 0, sub {
103 $cb->($! ? () : length $data);
104 };
105}
106
107sub get($$$) {
108 my ($db, $key, $cb) = @_;
109
110 my $data;
111 db_get table $db, undef, $key, $data, 0, sub {
112 $cb->($! ? () : $data);
113 };
114}
115
116sub put($$$$) {
117 my ($db, $key, $data, $cb) = @_;
118
119 db_put table $db, undef, $key, $data, 0, sub {
120 $cb->($!);
121 $SYNC->again unless $SYNC->is_active;
122 };
123}
124
125sub do_table {
126 my ($db, $cb) = @_;
127
128 $db = table $db;
129
130 my $cursor = $db->cursor;
131 my %kv;
132
133 for (;;) {
134 db_c_get $cursor, my $k, my $v, BDB::NEXT;
135 last if $!;
136 $kv{$k} = $v;
137 }
138
139 $cb->(\%kv);
140}
141
142sub do_get_tile_id {
143 my ($name, $cb) = @_;
144
145 my $table = table "facemap";
146 my $id;
147
148 db_get $table, undef, $name => $id, 0;
149 $! or return $cb->($id);
150
151 unless ($TILE_SEQ) {
152 $TILE_SEQ = $table->sequence;
153 $TILE_SEQ->initial_value (64);
154 $TILE_SEQ->set_cachesize (0);
155 db_sequence_open $TILE_SEQ, undef, "id", BDB::CREATE;
156 }
157
158 db_sequence_get $TILE_SEQ, undef, 1, my $id;
159
160 die "unable to allocate tile id: $!"
161 if $!;
162
163 db_put $table, undef, $name => $id, 0;
164 $cb->($id);
165
166}
167
168sub get_tile_id_sync($) {
169 my ($name) = @_;
170
171 $facemap->{$name} ||= do {
172 my $id;
173 do_get_tile_id $name, sub {
174 $id = $_[0];
175 };
176 BDB::flush;
177 $id
178 }
179}
180
181#############################################################################
27 182
28sub path_of_res($) { 183sub path_of_res($) {
29 utf8::downgrade $_[0]; # bug in unpack "H*" 184 utf8::downgrade $_[0]; # bug in unpack "H*"
30 "$DB_HOME/res-data-" . unpack "H*", $_[0] 185 "$DB_HOME/res-data-" . unpack "H*", $_[0]
31} 186}
32 187
33sub sync { 188sub sync {
34 # for debugging 189 # for debugging
35 #CFPlus::DB::Server::req (sync => sub { }); 190 #DC::DB::Server::req (sync => sub { });
36 CFPlus::DB::Server::sync (); 191 DC::DB::Server::sync ();
37}
38
39sub exists($$$) {
40 CFPlus::DB::Server::req (exists => @_);
41}
42
43sub get($$$) {
44 CFPlus::DB::Server::req (get => @_);
45}
46
47sub put($$$$) {
48 CFPlus::DB::Server::req (put => @_);
49} 192}
50 193
51sub unlink($$) { 194sub unlink($$) {
52 CFPlus::DB::Server::req (unlink => @_); 195 DC::DB::Server::req (unlink => @_);
53} 196}
54 197
55sub read_file($$) { 198sub read_file($$) {
56 CFPlus::DB::Server::req (read_file => @_); 199 DC::DB::Server::req (read_file => @_);
57} 200}
58 201
59sub write_file($$$) { 202sub write_file($$$) {
60 CFPlus::DB::Server::req (write_file => @_); 203 DC::DB::Server::req (write_file => @_);
61} 204}
62 205
63sub prefetch_file($$$) { 206sub prefetch_file($$$) {
64 CFPlus::DB::Server::req (prefetch_file => @_); 207 DC::DB::Server::req (prefetch_file => @_);
65} 208}
66 209
67sub logprint($$$) { 210sub logprint($$$) {
68 CFPlus::DB::Server::req (logprint => @_); 211 DC::DB::Server::req (logprint => @_);
69} 212}
70 213
71our $tilemap; 214#############################################################################
72 215
73sub get_tile_id_sync($) {
74 my ($name) = @_;
75
76 # fetch the full face table first
77 unless ($tilemap) {
78 CFPlus::DB::Server::req (table => facemap => sub {
79 $tilemap = $_[0];
80 delete $tilemap->{id};
81 my %maptile = reverse %$tilemap;#d#
82 if ((scalar keys %$tilemap) != (scalar keys %maptile)) {#d#
83 $tilemap = { };#d#
84 CFPlus::error "FATAL: facemap is not a 1:1 mapping, please report this and delete your $DB_HOME directory!\n";#d#
85 }#d#
86 });
87 sync;
88 }
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}
97
98package CFPlus::DB::Server; 216package DC::DB::Server;
99 217
100use strict; 218use strict;
101 219
102use EV (); 220use EV ();
103use Fcntl; 221use Fcntl;
104use BerkeleyDB;
105
106our $DB_ENV;
107our $DB_STATE;
108our %DB_TABLE;
109
110sub open_db {
111 mkdir $DB_HOME, 0777;
112 my $recover = $BerkeleyDB::db_version >= 4.4
113 ? eval "DB_REGISTER | DB_RECOVER"
114 : 0;
115
116 $DB_ENV = new BerkeleyDB::Env
117 -Home => $DB_HOME,
118 -Cachesize => 8_000_000,
119 -ErrFile => "$DB_HOME/errorlog.txt",
120# -ErrPrefix => "DATABASE",
121 -Verbose => 1,
122 -Flags => DB_CREATE | DB_RECOVER | DB_INIT_MPOOL | DB_INIT_LOCK | DB_INIT_TXN | $recover,
123 -SetFlags => DB_AUTO_COMMIT | DB_LOG_AUTOREMOVE | DB_TXN_WRITE_NOSYNC,
124 or die "unable to create/open database home $DB_HOME: $BerkeleyDB::Error";
125
126 1
127}
128
129sub table($) {
130 $DB_TABLE{$_[0]} ||= do {
131 my ($table) = @_;
132
133 $table =~ s/([^a-zA-Z0-9_\-])/sprintf "=%x=", ord $1/ge;
134
135 new BerkeleyDB::Btree
136 -Env => $DB_ENV,
137 -Filename => $table,
138# -Filename => "database",
139# -Subname => $table,
140 -Property => DB_CHKSUM,
141 -Flags => DB_AUTO_COMMIT | DB_CREATE | DB_UPGRADE,
142 or die "unable to create/open database table $_[0]: $BerkeleyDB::Error"
143 }
144}
145 222
146our %CB; 223our %CB;
147our $FH; 224our $FH;
148our $ID = "aaa0"; 225our $ID = "aaa0";
149our ($fh_r_watcher, $fh_w_watcher); 226our ($fh_r_watcher, $fh_w_watcher);
150our $sync_timer; 227our $sync_timer;
151our $write_buf; 228our $write_buf;
152our $read_buf; 229our $read_buf;
153 230
154our $SYNC = EV::timer_ns 0, 60, sub {
155 $_[0]->stop;
156 CFPlus::DB::Server::req (sync => sub { });
157};
158
159sub fh_write { 231sub fh_write {
160 my $len = syswrite $FH, $write_buf; 232 my $len = syswrite $FH, $write_buf;
161 233
162 substr $write_buf, 0, $len, ""; 234 substr $write_buf, 0, $len, "";
163 235
… …
206 my $id = ++$ID; 278 my $id = ++$ID;
207 $write_buf .= pack "N/a*", Storable::freeze [$id, $type, @args]; 279 $write_buf .= pack "N/a*", Storable::freeze [$id, $type, @args];
208 $CB{$id} = $cb; 280 $CB{$id} = $cb;
209 281
210 $fh_w_watcher->start; 282 $fh_w_watcher->start;
211 $SYNC->again unless $SYNC->is_active;
212}
213
214sub do_sync {
215 $DB_ENV->txn_checkpoint (0, 0, 0);
216 ()
217}
218
219sub do_exists {
220 my ($db, $key) = @_;
221
222 utf8::downgrade $key;
223 my $data;
224 (table $db)->db_get ($key, $data) == 0
225 ? length $data
226 : ()
227}
228
229sub do_get {
230 my ($db, $key) = @_;
231
232 utf8::downgrade $key;
233 my $data;
234 (table $db)->db_get ($key, $data) == 0
235 ? $data
236 : ()
237}
238
239sub do_put {
240 my ($db, $key, $data) = @_;
241
242 utf8::downgrade $key;
243 utf8::downgrade $data;
244 (table $db)->db_put ($key => $data)
245}
246
247sub do_table {
248 my ($db) = @_;
249
250 $db = table $db;
251
252 my $cursor = $db->db_cursor;
253 my %kv;
254 my ($k, $v);
255 $kv{$k} = $v while $cursor->c_get ($k, $v, BerkeleyDB::DB_NEXT) == 0;
256
257 \%kv
258}
259
260sub do_get_tile_id {
261 my ($name) = @_;
262
263 my $id;
264 my $table = table "facemap";
265
266 return $id
267 if $table->db_get ($name, $id) == 0;
268
269 for (1..100) {
270 my $txn = $DB_ENV->txn_begin;
271 my $status = $table->db_get (id => $id);
272 if ($status == 0 || $status == BerkeleyDB::DB_NOTFOUND) {
273 $id = ($id || 64) + 1;
274 if ($table->db_put (id => $id) == 0
275 && $table->db_put ($name => $id) == 0) {
276 $txn->txn_commit;
277
278 return $id;
279 }
280 }
281 $txn->txn_abort;
282 select undef, undef, undef, 0.01 * rand;
283 }
284
285 die "maximum number of transaction retries reached - database problems?";
286} 283}
287 284
288sub do_unlink { 285sub do_unlink {
289 unlink $_[0]; 286 unlink $_[0];
290} 287}
… …
345 342
346 print { $LOG_FH{$path} } "$ts $line\n" 343 print { $LOG_FH{$path} } "$ts $line\n"
347} 344}
348 345
349sub run { 346sub run {
350 ($FH, my $fh) = CFPlus::socketpipe; 347 ($FH, my $fh) = DC::socketpipe;
351 348
352 my $oldfh = select $FH; $| = 1; select $oldfh; 349 my $oldfh = select $FH; $| = 1; select $oldfh;
353 my $oldfh = select $fh; $| = 1; select $oldfh; 350 my $oldfh = select $fh; $| = 1; select $oldfh;
354 351
355 my $pid = fork; 352 my $pid = fork;
356 353
357 if (defined $pid && !$pid) { 354 if (defined $pid && !$pid) {
358 local $SIG{QUIT}; 355 local $SIG{QUIT} = "IGNORE";
359 local $SIG{__DIE__}; 356 local $SIG{__DIE__};
360 local $SIG{__WARN__}; 357 local $SIG{__WARN__};
361 eval { 358 eval {
362 close $FH; 359 close $FH;
363
364 unless (eval { open_db }) {
365 eval { File::Path::rmtree $DB_HOME };
366 open_db;
367 }
368 360
369 while () { 361 while () {
370 4 == read $fh, my $len, 4 362 4 == read $fh, my $len, 4
371 or last; 363 or last;
372 $len = unpack "N", $len; 364 $len = unpack "N", $len;
… …
374 or die "unexpected eof while reading request"; 366 or die "unexpected eof while reading request";
375 367
376 $req = Storable::thaw $req; 368 $req = Storable::thaw $req;
377 369
378 my ($id, $type, @args) = @$req; 370 my ($id, $type, @args) = @$req;
379 my $cb = CFPlus::DB::Server->can ("do_$type") 371 my $cb = DC::DB::Server->can ("do_$type")
380 or die "$type: unknown database request type\n"; 372 or die "$type: unknown database request type\n";
381 my $res = pack "N/a*", Storable::freeze [$id, $cb->(@args)]; 373 my $res = pack "N/a*", Storable::freeze [$id, $cb->(@args)];
382 (syswrite $fh, $res) == length $res 374 (syswrite $fh, $res) == length $res
383 or die "DB::write: $!"; 375 or die "DB::write: $!";
384 } 376 }
385 }; 377 };
386 378
387 my $error = $@; 379 my $error = $@;
388 380
389 eval { 381 eval {
390 $DB_ENV->txn_checkpoint (0, 0, 0);
391
392 undef %DB_TABLE;
393 undef $DB_ENV;
394
395 Storable::store_fd [die => $error], $fh; 382 Storable::store_fd [die => $error], $fh;
396 }; 383 };
397 384
385 warn $error
386 if $error;
387
398 CFPlus::_exit 0; 388 DC::_exit 0;
399 } 389 }
400 390
401 close $fh; 391 close $fh;
402 CFPlus::fh_nonblocking $FH, 1; 392 DC::fh_nonblocking $FH, 1;
403 393
404 $CB{die} = sub { die shift }; 394 $CB{die} = sub { die shift };
405 395
406 $fh_r_watcher = EV::io $FH, EV::READ , \&fh_read; 396 $fh_r_watcher = EV::io $FH, EV::READ , \&fh_read;
407 $fh_w_watcher = EV::io $FH, EV::WRITE, \&fh_write; 397 $fh_w_watcher = EV::io $FH, EV::WRITE, \&fh_write;
408 $SYNC->again unless $SYNC->is_active;
409} 398}
410 399
411sub stop { 400sub stop {
412 close $FH; 401 close $FH;
413} 402}
414 403
404package DC::DB;
405
406sub nuke_db {
407 File::Path::mkpath [$DB_HOME];
408 eval { File::Path::rmtree $DB_HOME };
409}
410
411sub open_db {
412 unless (eval { try_open_db }) {
413 warn "$@";#d#
414 eval { nuke_db };
415 try_open_db;
416 }
417
418 # fetch the full face table first
419 unless ($facemap) {
420 do_table facemap => sub {
421 $facemap = $_[0];
422 delete $facemap->{id};
423 my %maptile = reverse %$facemap;#d#
424 if ((scalar keys %$facemap) != (scalar keys %maptile)) {#d#
425 $facemap = { };#d#
426 DC::error "FATAL: facemap is not a 1:1 mapping, please report this and delete your $DB_HOME directory!\n";#d#
427 }#d#
428 };
429 }
430
431 $WATCHER = EV::io BDB::poll_fileno, EV::READ, \&BDB::poll_cb;
432 $SYNC = EV::timer_ns 0, 60, sub {
433 $_[0]->stop;
434 db_env_txn_checkpoint $DB_ENV, 0, 0, 0, sub { };
435 };
436}
437
438END {
439 undef $TILE_SEQ;
440 %DB_TABLE = ();
441 undef $DB_ENV;
442}
443
4151; 4441;
416 445
417=back 446=back
418 447
419=head1 AUTHOR 448=head1 AUTHOR

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