[ViewVC] Diff of: cvs/deliantra/Deliantra-Client/DC/DB.pm

Comparing deliantra/Deliantra-Client/DC/DB.pm (file contents):
Revision 1.3 by root, Fri Apr 6 21:53:56 2007 UTC vs.
Revision 1.43 by root, Fri Jan 9 22:38:17 2009 UTC

…		…
1	=head1 NAME	1	=head1 NAME
2		2
3	CFPlus::DB - async. database access for cfplus	3	DC::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
15	package CFPlus::DB;	15	package DC::DB;
16		16
17	use strict;	17	use strict;
18	use utf8;	18	use utf8;
19		19
		20	use File::Path ();
20	use Carp ();	21	use Carp ();
		22	use Storable ();
21	use AnyEvent ();	23	use AnyEvent::Util ();
22	use Storable (); # finally	24	use Config;
23		25	use BDB;
24	use CFPlus;
25
26	sub sync {
27	# for debugging
28	#CFPlus::DB::Server::req (sync => sub { });
29	CFPlus::DB::Server::sync ();
30	}
31
32	sub get($$$) {
33	CFPlus::DB::Server::req (get => @_);
34	}
35
36	sub put($$$$) {
37	CFPlus::DB::Server::req (put => @_);
38	}
39
40	our $tilemap;
41
42	sub get_tile_id_sync($) {
43	my ($hash) = @_;
44
45	# fetch the full face table first
46	unless ($tilemap) {
47	CFPlus::DB::Server::req (table => facemap => sub { $tilemap = $_[0] });
48	sync;
49	}
50
51	$tilemap->{$hash} \|\|= do {
52	my $id;
53	CFPlus::DB::Server::req (get_tile_id => $hash, sub { $id = $_[0] });
54	sync;
55	$id
56	}
57	}
58
59	package CFPlus::DB::Server;
60
61	use strict;
62
63	use Fcntl;	26	use Fcntl ();
64	use BerkeleyDB;
65		27
66	our $DB_HOME = "$Crossfire::VARDIR/cfplus";	28	use DC;
		29
		30	our $ODBDIR = "cfplus-" . BDB::VERSION_MAJOR . "." . BDB::VERSION_MINOR . "-$Config{archname}";
		31	our $DBDIR = "client-" . BDB::VERSION_MAJOR . "." . BDB::VERSION_MINOR . "-$Config{archname}";
		32	our $DB_HOME = "$Deliantra::VARDIR/$DBDIR";
		33
		34	sub FIRST_TILE_ID () { 64 }
		35
		36	unless (-d $DB_HOME) {
		37	if (-d "$Deliantra::VARDIR/$ODBDIR") {
		38	rename "$Deliantra::VARDIR/$ODBDIR", $DB_HOME;
		39	print STDERR "INFO: moved old database from $Deliantra::VARDIR/$ODBDIR to $DB_HOME\n";
		40	} elsif (-d "$Deliantra::OLDDIR/$ODBDIR") {
		41	rename "$Deliantra::OLDDIR/$DBDIR", $DB_HOME;
		42	print STDERR "INFO: moved old database from $Deliantra::OLDDIR/$ODBDIR to $DB_HOME\n";
		43	} else {
		44	File::Path::mkpath [$DB_HOME]
		45	or die "unable to create database directory $DB_HOME: $!";
		46	}
		47	}
		48
		49	BDB::max_poll_time 0.03;
		50	BDB::max_parallel 1;
		51
67	our $DB_ENV;	52	our $DB_ENV;
68	our $DB_STATE;	53	our $DB_STATE;
69	our %DB_TABLE;	54	our %DB_TABLE;
		55	our $TILE_SEQ;
70		56
		57	sub all_databases {
		58	opendir my $fh, $DB_HOME
		59	or return;
		60
		61	grep !/^(?:\.\|log\.\|_)/, readdir $fh
		62	}
		63
		64	sub try_verify_env($) {
		65	my ($env) = @_;
		66
		67	# we lock the __db.register env file that has been created by now
		68	# and check for the number of registered processes - if there is
		69	# only one, we verify all databases, otherwise we skip this
		70	open my $fh, "+<$DB_HOME/__db.register"
		71	or die "__db.register: $!";
		72
		73	open my $lock, "+>$DB_HOME/__lock"
		74	or die "__lock: $!";
		75
		76	flock $lock, &Fcntl::LOCK_EX
		77	or die "flock: $!";
		78
		79	# __db.register contains one record per process, with X signifying
		80	# empty records (of course, this is completely private to bdb...)
		81	my $count = grep /^[^X]/, <$fh>;
		82
		83	if ($count == 1) {
		84	# if any databases are corrupted, we simply delete all of them
		85
		86	for (all_databases) {
		87	my $dbh = db_create $env
		88	or last;
		89
		90	# a failed verify will panic the environment, which is fine with us
		91	db_verify $dbh, "$DB_HOME/$_";
		92
		93	return if $!; # nuke database and recreate if verification failure
		94	}
		95
		96	}
		97
		98	# close probably cleans those up, but we also want to run on windows,
		99	# so better be safe.
		100	flock $lock, &Fcntl::LOCK_UN
		101	or die "funlock: $!";
		102
		103	1
		104	}
		105
71	sub open_db {	106	sub try_open_db {
72	mkdir $DB_HOME, 0777;	107	File::Path::mkpath [$DB_HOME];
73	my $recover = $BerkeleyDB::db_version >= 4.4	108
74	? eval "DB_REGISTER \| DB_RECOVER"	109	my $env = db_env_create;
		110
		111	$env->set_errfile (\*STDERR);
		112	$env->set_msgfile (\*STDERR);
		113	$env->set_verbose (-1, 1);
		114
		115	$env->set_flags (BDB::AUTO_COMMIT \| BDB::REGION_INIT);
		116	$env->set_flags (&BDB::LOG_AUTOREMOVE ) if BDB::VERSION v0, v4.7;
		117	$env->log_set_config (&BDB::LOG_AUTO_REMOVE) if BDB::VERSION v4.7;
		118
		119	$env->set_timeout (3, BDB::SET_TXN_TIMEOUT);
		120	$env->set_timeout (3, BDB::SET_LOCK_TIMEOUT);
		121
		122	$env->set_cachesize (0, 2048 * 1024, 0);
		123
		124	db_env_open $env, $DB_HOME,
		125	BDB::CREATE \| BDB::REGISTER \| BDB::RECOVER \| BDB::INIT_MPOOL \| BDB::INIT_LOCK \| BDB::INIT_TXN,
75	: 0;	126	0666;
76		127
77	$DB_ENV = new BerkeleyDB::Env	128	$! and die "cannot open database environment $DB_HOME: " . BDB::strerror;
78	-Home => $DB_HOME,	129
79	-Cachesize => 8_000_000,	130	# now we go through the registered processes, if there is only one, we verify all files
80	-ErrFile => "$DB_HOME/errorlog.txt",	131	# to make sure windows didn'T corrupt them (as windows does....)
81	# -ErrPrefix => "DATABASE",	132	try_verify_env $env
82	-Verbose => 1,	133	or die "database environment failed verification";
83	-Flags => DB_CREATE \| DB_RECOVER \| DB_INIT_MPOOL \| DB_INIT_LOCK \| DB_INIT_TXN \| $recover,	134
84	-SetFlags => DB_AUTO_COMMIT \| DB_LOG_AUTOREMOVE,	135	$DB_ENV = $env;
85	or die "unable to create/open database home $DB_HOME: $BerkeleyDB::Error";
86		136
87	1	137	1
88	}	138	}
89		139
90	sub table($) {	140	sub table($) {
91	$DB_TABLE{$_[0]} \|\|= do {	141	$DB_TABLE{$_[0]} \|\|= do {
92	my ($table) = @_;	142	my ($table) = @_;
93		143
94	$table =~ s/([^a-zA-Z0-9_\-])/sprintf "=%x=", ord $1/ge;	144	$table =~ s/([^a-zA-Z0-9_\-])/sprintf "=%x=", ord $1/ge;
95		145
96	new BerkeleyDB::Btree	146	$DB_ENV#d#
97	-Env => $DB_ENV,	147	or return ::clienterror ("trying to create table $_[0] with empty db_env $DB_ENV" => 1);#d#
98	-Filename => $table,	148
99	# -Filename => "database",	149	my $db = db_create $DB_ENV;
100	# -Subname => $table,	150	$db->set_flags (BDB::CHKSUM);
101	-Property => DB_CHKSUM,	151
102	-Flags => DB_CREATE \| DB_UPGRADE,	152	db_open $db, undef, $table, undef, BDB::BTREE,
103	or die "unable to create/open database table $_[0]: $BerkeleyDB::Error"	153	BDB::AUTO_COMMIT \| BDB::CREATE \| BDB::READ_UNCOMMITTED, 0666;
		154
		155	$! and "unable to open/create database table $_[0]: ". BDB::strerror;
		156
		157	$db
		158	}
		159	}
		160
		161	#############################################################################
		162
		163	our $WATCHER;
		164	our $SYNC;
		165	our $facemap;
		166
		167	sub exists($$$) {
		168	my ($db, $key, $cb) = @_;
		169
		170	my $data;
		171	db_get table $db, undef, $key, $data, 0, sub {
		172	$cb->($! ? () : length $data);
104	}	173	};
105	}	174	}
106		175
107	our $SYNC_INTERVAL = 6;	176	sub get($$$) {
		177	my ($db, $key, $cb) = @_;
		178
		179	my $data;
		180	db_get table $db, undef, $key, $data, 0, sub {
		181	$cb->($! ? () : $data);
		182	};
		183	}
		184
		185	sub put($$$$) {
		186	my ($db, $key, $data, $cb) = @_;
		187
		188	db_put table $db, undef, $key, $data, 0, sub {
		189	$cb->($!);
		190	$SYNC->again unless $SYNC->is_active;
		191	};
		192	}
		193
		194	sub do_table {
		195	my ($db, $cb) = @_;
		196
		197	$db = table $db;
		198
		199	my $cursor = $db->cursor;
		200	my %kv;
		201
		202	for (;;) {
		203	db_c_get $cursor, my $k, my $v, BDB::NEXT;
		204	last if $!;
		205	$kv{$k} = $v;
		206	}
		207
		208	$cb->(\%kv);
		209	}
		210
		211	sub do_get_tile_id {
		212	my ($name, $cb) = @_;
		213
		214	my $table = table "facemap";
		215	my $id;
		216
		217	db_get $table, undef, $name => $id, 0;
		218	$! or return $cb->($id);
		219
		220	unless ($TILE_SEQ) {
		221	$TILE_SEQ = $table->sequence;
		222	$TILE_SEQ->initial_value (FIRST_TILE_ID);
		223	$TILE_SEQ->set_cachesize (0);
		224	db_sequence_open $TILE_SEQ, undef, "id", BDB::CREATE;
		225	}
		226
		227	db_sequence_get $TILE_SEQ, undef, 1, my $id;
		228
		229	die "unable to allocate tile id: $!"
		230	if $!;
		231
		232	db_put $table, undef, $name => $id, 0;
		233	$cb->($id);
		234
		235	}
		236
		237	sub get_tile_id_sync($) {
		238	my ($name) = @_;
		239
		240	$facemap->{$name} \|\|= do {
		241	my $id;
		242	do_get_tile_id $name, sub {
		243	$id = $_[0];
		244	};
		245	BDB::flush;
		246	$id
		247	}
		248	}
		249
		250	#############################################################################
		251
		252	sub path_of_res($) {
		253	utf8::downgrade $_[0]; # bug in unpack "H*"
		254	"$DB_HOME/res-data-" . unpack "H*", $_[0]
		255	}
		256
		257	sub sync {
		258	# for debugging
		259	#DC::DB::Server::req (sync => sub { });
		260	DC::DB::Server::sync ();
		261	}
		262
		263	sub unlink($$) {
		264	DC::DB::Server::req (unlink => @_);
		265	}
		266
		267	sub read_file($$) {
		268	DC::DB::Server::req (read_file => @_);
		269	}
		270
		271	sub write_file($$$) {
		272	DC::DB::Server::req (write_file => @_);
		273	}
		274
		275	sub prefetch_file($$$) {
		276	DC::DB::Server::req (prefetch_file => @_);
		277	}
		278
		279	sub logprint($$$) {
		280	DC::DB::Server::req (logprint => @_);
		281	}
		282
		283	#############################################################################
		284
		285	package DC::DB::Server;
		286
		287	use strict;
		288
		289	use EV ();
		290	use Fcntl;
108		291
109	our %CB;	292	our %CB;
110	our $FH;	293	our $FH;
111	our $ID = "aaa0";	294	our $ID = "aaa0";
112	our ($fh_r_watcher, $fh_w_watcher);	295	our ($fh_r_watcher, $fh_w_watcher);
117	sub fh_write {	300	sub fh_write {
118	my $len = syswrite $FH, $write_buf;	301	my $len = syswrite $FH, $write_buf;
119		302
120	substr $write_buf, 0, $len, "";	303	substr $write_buf, 0, $len, "";
121		304
122	undef $fh_w_watcher	305	$fh_w_watcher->stop
123	unless length $write_buf;	306	unless length $write_buf;
124	}	307	}
125		308
126	sub fh_read {	309	sub fh_read {
127	my $status = sysread $FH, $read_buf, 16384, length $read_buf;	310	my $status = sysread $FH, $read_buf, 16384, length $read_buf;
…		…
163		346
164	my $id = ++$ID;	347	my $id = ++$ID;
165	$write_buf .= pack "N/a*", Storable::freeze [$id, $type, @args];	348	$write_buf .= pack "N/a*", Storable::freeze [$id, $type, @args];
166	$CB{$id} = $cb;	349	$CB{$id} = $cb;
167		350
168	$fh_w_watcher = AnyEvent->io (fh => $FH, poll => 'w', cb => \&fh_write);	351	$fh_w_watcher->start;
169	}	352	}
170		353
171	sub sync_tick {	354	sub do_unlink {
172	req "sync", sub { };	355	unlink $_[0];
173	$sync_timer = AnyEvent->timer (after => $SYNC_INTERVAL, cb => \&sync_tick);
174	}	356	}
175		357
176	sub do_sync {
177	$DB_ENV->txn_checkpoint (0, 0, 0);
178	()
179	}
180
181	sub do_get {
182	my ($db, $key) = @_;
183
184	my $data;
185	(table $db)->db_get ($key, $data) == 0
186	? $data
187	: ()
188	}
189
190	sub do_put {
191	my ($db, $key, $data) = @_;
192
193	(table $db)->db_put ($key => $data)
194	}
195
196	sub do_table {	358	sub do_read_file {
197	my ($db) = @_;
198
199	$db = table $db;
200
201	my $cursor = $db->db_cursor;
202	my %kv;
203	my ($k, $v);
204	$kv{$k} = $v while $cursor->c_get ($k, $v, BerkeleyDB::DB_NEXT) == 0;
205
206	\%kv
207	}
208
209	sub do_get_tile_id {
210	my ($hash) = @_;	359	my ($path) = @_;
211		360
212	my $id;	361	utf8::downgrade $path;
213	my $table = table "facemap";	362	open my $fh, "<:raw", $path
		363	or return;
		364	sysread $fh, my $buf, -s $fh;
214		365
215	return $id	366	$buf
216	if $table->db_get ($hash, $id) == 0;	367	}
217		368
218	for (1..100) {	369	sub do_write_file {
219	my $txn = $DB_ENV->txn_begin;	370	my ($path, $data) = @_;
220	my $status = $table->db_get (id => $id);
221	if ($status == 0 \|\| $status == BerkeleyDB::DB_NOTFOUND) {
222	$id = ($id \|\| 64) + 1;
223	if ($table->db_put (id => $id) == 0
224	&& $table->db_put ($hash => $id) == 0) {
225	$txn->txn_commit;
226		371
227	return $id;	372	utf8::downgrade $path;
228	}	373	utf8::downgrade $data;
		374	open my $fh, ">:raw", $path
		375	or return;
		376	syswrite $fh, $data;
		377	close $fh;
		378
		379	1
		380	}
		381
		382	sub do_prefetch_file {
		383	my ($path, $size) = @_;
		384
		385	utf8::downgrade $path;
		386	open my $fh, "<:raw", $path
		387	or return;
		388	sysread $fh, my $buf, $size;
		389
		390	1
		391	}
		392
		393	our %LOG_FH;
		394
		395	sub do_logprint {
		396	my ($path, $line) = @_;
		397
		398	$LOG_FH{$path} \|\|= do {
		399	open my $fh, ">>:utf8", $path
		400	or warn "Couldn't open logfile $path: $!";
		401
		402	$fh->autoflush (1);
		403
229	}	404	$fh
230	$txn->txn_abort;
231	}	405	};
232		406
233	die "maximum number of transaction retries reached - database problems?";	407	my ($sec, $min, $hour, $mday, $mon, $year) = localtime time;
		408
		409	my $ts = sprintf "%04d-%02d-%02d %02d:%02d:%02d",
		410	$year + 1900, $mon + 1, $mday, $hour, $min, $sec;
		411
		412	print { $LOG_FH{$path} } "$ts $line\n"
234	}	413	}
235		414
236	sub run {	415	sub run {
237	($FH, my $fh) = CFPlus::socketpipe;	416	($FH, my $fh) = AnyEvent::Util::portable_socketpair
		417	or die "unable to create database socketpair: $!";
238		418
239	my $oldfh = select $FH; $\| = 1; select $oldfh;	419	my $oldfh = select $FH; $\| = 1; select $oldfh;
240	my $oldfh = select $fh; $\| = 1; select $oldfh;	420	my $oldfh = select $fh; $\| = 1; select $oldfh;
241		421
242	my $pid = fork;	422	my $pid = fork;
243		423
244	if (defined $pid && !$pid) {	424	if (defined $pid && !$pid) {
		425	local $SIG{QUIT} = "IGNORE";
245	local $SIG{__DIE__};	426	local $SIG{__DIE__};
		427	local $SIG{__WARN__};
246	eval {	428	eval {
247	close $FH;	429	close $FH;
248
249	unless (eval { open_db }) {
250	File::Path::rmtree $DB_HOME;
251	open_db;
252	}
253		430
254	while () {	431	while () {
255	4 == read $fh, my $len, 4	432	4 == read $fh, my $len, 4
256	or last;	433	or last;
257	$len = unpack "N", $len;	434	$len = unpack "N", $len;
…		…
259	or die "unexpected eof while reading request";	436	or die "unexpected eof while reading request";
260		437
261	$req = Storable::thaw $req;	438	$req = Storable::thaw $req;
262		439
263	my ($id, $type, @args) = @$req;	440	my ($id, $type, @args) = @$req;
264	my $cb = CFPlus::DB::Server->can ("do_$type")	441	my $cb = DC::DB::Server->can ("do_$type")
265	or die "$type: unknown database request type\n";	442	or die "$type: unknown database request type\n";
266	my $res = pack "N/a*", Storable::freeze [$id, $cb->(@args)];	443	my $res = pack "N/a*", Storable::freeze [$id, $cb->(@args)];
267	(syswrite $fh, $res) == length $res	444	(syswrite $fh, $res) == length $res
268	or die;	445	or die "DB::write: $!";
269	}	446	}
270	};	447	};
271		448
272	my $error = $@;	449	my $error = $@;
273		450
274	eval {	451	eval {
275	undef %DB_TABLE;
276	undef $DB_ENV;
277
278	Storable::store_fd [die => $error], $fh;	452	Storable::store_fd [die => $error], $fh;
279	};	453	};
280		454
		455	warn $error
		456	if $error;
		457
281	CFPlus::_exit 0;	458	DC::_exit 0;
282	}	459	}
283		460
284	close $fh;	461	close $fh;
285	CFPlus::fh_nonblocking $FH, 1;	462	DC::fh_nonblocking $FH, 1;
286		463
287	$CB{die} = sub { die shift };	464	$CB{die} = sub { die shift };
288		465
289	$fh_r_watcher = AnyEvent->io (fh => $FH, poll => 'r', cb => \&fh_read);	466	$fh_r_watcher = EV::io $FH, EV::READ , \&fh_read;
		467	$fh_w_watcher = EV::io $FH, EV::WRITE, \&fh_write;
		468	}
290		469
291	sync_tick;	470	sub stop {
		471	close $FH;
		472	}
		473
		474	package DC::DB;
		475
		476	sub nuke_db {
		477	File::Path::mkpath [$DB_HOME];
		478	eval { File::Path::rmtree $DB_HOME };
		479	}
		480
		481	sub open_db {
		482	unless (eval { try_open_db }) {
		483	warn "$@";#d#
		484	eval { nuke_db };
		485	try_open_db;
		486	}
		487
		488	# fetch the full face table first
		489	unless ($facemap) {
		490	do_table facemap => sub {
		491	$facemap = $_[0];
		492	delete $facemap->{id};
		493	my %maptile = reverse %$facemap;#d#
		494	if ((scalar keys %$facemap) != (scalar keys %maptile)) {#d#
		495	$facemap = { };#d#
		496	DC::error "FATAL: facemap is not a 1:1 mapping, please report this and delete your $DB_HOME directory!\n";#d#
		497	}#d#
		498	};
		499	}
		500
		501	$WATCHER = EV::io BDB::poll_fileno, EV::READ, \&BDB::poll_cb;
		502	$SYNC = EV::timer_ns 0, 60, sub {
		503	$_[0]->stop;
		504	db_env_txn_checkpoint $DB_ENV, 0, 0, 0, sub { };
		505	};
		506	}
		507
		508	END {
		509	db_env_txn_checkpoint $DB_ENV, 0, 0, 0
		510	if $DB_ENV;
		511
		512	undef $TILE_SEQ;
		513	%DB_TABLE = ();
		514	undef $DB_ENV;
292	}	515	}
293		516
294	1;	517	1;
295		518
296	=back	519	=back

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Comparing deliantra/Deliantra-Client/DC/DB.pm (file contents): Revision 1.3 by root, Fri Apr 6 21:53:56 2007 UTC vs. Revision 1.43 by root, Fri Jan 9 22:38:17 2009 UTC

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Comparing deliantra/Deliantra-Client/DC/DB.pm (file contents):
Revision 1.3 by root, Fri Apr 6 21:53:56 2007 UTC vs.
Revision 1.43 by root, Fri Jan 9 22:38:17 2009 UTC