[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 1.45 by root, Sat Apr 3 02:58:24 2010 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 common::sense;
18	use utf8;
19		18
		19	use File::Path ();
20	use Carp ();	20	use Carp ();
		21	use Storable ();
21	use AnyEvent ();	22	use AnyEvent::Util ();
22	use Storable (); # finally	23	use Config;
23		24	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;	25	use Fcntl ();
64	use BerkeleyDB;
65		26
66	our $DB_HOME = "$Crossfire::VARDIR/cfplus";	27	use DC;
		28
		29	our $ODBDIR = "cfplus-" . BDB::VERSION_MAJOR . "." . BDB::VERSION_MINOR . "-$Config{archname}";
		30	our $DBDIR = "client-" . BDB::VERSION_MAJOR . "." . BDB::VERSION_MINOR . "-$Config{archname}";
		31	our $DB_HOME = "$Deliantra::VARDIR/$DBDIR";
		32
		33	sub FIRST_TILE_ID () { 64 }
		34
		35	unless (-d $DB_HOME) {
		36	if (-d "$Deliantra::VARDIR/$ODBDIR") {
		37	rename "$Deliantra::VARDIR/$ODBDIR", $DB_HOME;
		38	print STDERR "INFO: moved old database from $Deliantra::VARDIR/$ODBDIR to $DB_HOME\n";
		39	} elsif (-d "$Deliantra::OLDDIR/$ODBDIR") {
		40	rename "$Deliantra::OLDDIR/$DBDIR", $DB_HOME;
		41	print STDERR "INFO: moved old database from $Deliantra::OLDDIR/$ODBDIR to $DB_HOME\n";
		42	} else {
		43	File::Path::mkpath [$DB_HOME]
		44	or die "unable to create database directory $DB_HOME: $!";
		45	}
		46	}
		47
		48	BDB::max_poll_time 0.03;
		49	BDB::max_parallel 1;
		50
67	our $DB_ENV;	51	our $DB_ENV;
		52	our $DB_ENV_FH;
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	open my $lock, "+>$DB_HOME/__lock"
		68	or die "__lock: $!";
		69
		70	flock $lock, &Fcntl::LOCK_EX
		71	or die "flock: $!";
		72
		73	# we look at the __db.register env file that has been created by now
		74	# and check for the number of registered processes - if there is
		75	# only one, we verify all databases, otherwise we skip this
		76	# we MUST NOT close the filehandle as longa swe keep the env open, as
		77	# this destroys the record locks on it.
		78	open $DB_ENV_FH, "<$DB_HOME/__db.register"
		79	or die "__db.register: $!";
		80
		81	# __db.register contains one record per process, with X signifying
		82	# empty records (of course, this is completely private to bdb...)
		83	my $count = grep /^[^X]/, <$DB_ENV_FH>;
		84
		85	if ($count == 1) {
		86	# if any databases are corrupted, we simply delete all of them
		87
		88	for (all_databases) {
		89	my $dbh = db_create $env
		90	or last;
		91
		92	# a failed verify will panic the environment, which is fine with us
		93	db_verify $dbh, "$DB_HOME/$_";
		94
		95	return if $!; # nuke database and recreate if verification failure
		96	}
		97
		98	}
		99
		100	# close probably cleans those up, but we also want to run on windows,
		101	# so better be safe.
		102	flock $lock, &Fcntl::LOCK_UN
		103	or die "funlock: $!";
		104
		105	1
		106	}
		107
71	sub open_db {	108	sub try_open_db {
72	mkdir $DB_HOME, 0777;	109	File::Path::mkpath [$DB_HOME];
73	my $recover = $BerkeleyDB::db_version >= 4.4	110
74	? eval "DB_REGISTER \| DB_RECOVER"	111	undef $DB_ENV;
		112	undef $DB_ENV_FH;
		113
		114	my $env = db_env_create;
		115
		116	$env->set_errfile (\*STDERR);
		117	$env->set_msgfile (\*STDERR);
		118	$env->set_verbose (-1, 1);
		119
		120	$env->set_flags (BDB::AUTO_COMMIT \| BDB::REGION_INIT);
		121	$env->set_flags (&BDB::LOG_AUTOREMOVE ) if BDB::VERSION v0, v4.7;
		122	$env->log_set_config (&BDB::LOG_AUTO_REMOVE) if BDB::VERSION v4.7;
		123
		124	$env->set_timeout (3, BDB::SET_TXN_TIMEOUT);
		125	$env->set_timeout (3, BDB::SET_LOCK_TIMEOUT);
		126
		127	$env->set_cachesize (0, 2048 * 1024, 0);
		128
		129	db_env_open $env, $DB_HOME,
		130	BDB::CREATE \| BDB::REGISTER \| BDB::RECOVER \| BDB::INIT_MPOOL \| BDB::INIT_LOCK \| BDB::INIT_TXN,
75	: 0;	131	0666;
76		132
77	$DB_ENV = new BerkeleyDB::Env	133	$! and die "cannot open database environment $DB_HOME: " . BDB::strerror;
78	-Home => $DB_HOME,	134
79	-Cachesize => 8_000_000,	135	# now we go through the registered processes, if there is only one, we verify all files
80	-ErrFile => "$DB_HOME/errorlog.txt",	136	# to make sure windows didn'T corrupt them (as windows does....)
81	# -ErrPrefix => "DATABASE",	137	try_verify_env $env
82	-Verbose => 1,	138	or die "database environment failed verification";
83	-Flags => DB_CREATE \| DB_RECOVER \| DB_INIT_MPOOL \| DB_INIT_LOCK \| DB_INIT_TXN \| $recover,	139
84	-SetFlags => DB_AUTO_COMMIT \| DB_LOG_AUTOREMOVE,	140	$DB_ENV = $env;
85	or die "unable to create/open database home $DB_HOME: $BerkeleyDB::Error";
86		141
87	1	142	1
88	}	143	}
89		144
90	sub table($) {	145	sub table($) {
91	$DB_TABLE{$_[0]} \|\|= do {	146	$DB_TABLE{$_[0]} \|\|= do {
92	my ($table) = @_;	147	my ($table) = @_;
93		148
94	$table =~ s/([^a-zA-Z0-9_\-])/sprintf "=%x=", ord $1/ge;	149	$table =~ s/([^a-zA-Z0-9_\-])/sprintf "=%x=", ord $1/ge;
95		150
96	new BerkeleyDB::Btree	151	$DB_ENV#d#
97	-Env => $DB_ENV,	152	or return ::clienterror ("trying to create table $_[0] with empty db_env $DB_ENV" => 1);#d#
98	-Filename => $table,	153
99	# -Filename => "database",	154	my $db = db_create $DB_ENV;
100	# -Subname => $table,	155	$db->set_flags (BDB::CHKSUM);
101	-Property => DB_CHKSUM,	156
102	-Flags => DB_CREATE \| DB_UPGRADE,	157	db_open $db, undef, $table, undef, BDB::BTREE,
103	or die "unable to create/open database table $_[0]: $BerkeleyDB::Error"	158	BDB::AUTO_COMMIT \| BDB::CREATE \| BDB::READ_UNCOMMITTED, 0666;
		159
		160	$! and "unable to open/create database table $_[0]: ". BDB::strerror;
		161
		162	$db
		163	}
		164	}
		165
		166	#############################################################################
		167
		168	our $WATCHER;
		169	our $SYNC;
		170	our $facemap;
		171
		172	sub exists($$$) {
		173	my ($db, $key, $cb) = @_;
		174
		175	my $data;
		176	db_get table $db, undef, $key, $data, 0, sub {
		177	$cb->($! ? () : length $data);
104	}	178	};
105	}	179	}
106		180
107	our $SYNC_INTERVAL = 6;	181	sub get($$$) {
		182	my ($db, $key, $cb) = @_;
		183
		184	my $data;
		185	db_get table $db, undef, $key, $data, 0, sub {
		186	$cb->($! ? () : $data);
		187	};
		188	}
		189
		190	sub put($$$$) {
		191	my ($db, $key, $data, $cb) = @_;
		192
		193	db_put table $db, undef, $key, $data, 0, sub {
		194	$cb->($!);
		195	$SYNC->again unless $SYNC->is_active;
		196	};
		197	}
		198
		199	sub do_table {
		200	my ($db, $cb) = @_;
		201
		202	$db = table $db;
		203
		204	my $cursor = $db->cursor;
		205	my %kv;
		206
		207	for (;;) {
		208	db_c_get $cursor, my $k, my $v, BDB::NEXT;
		209	last if $!;
		210	$kv{$k} = $v;
		211	}
		212
		213	$cb->(\%kv);
		214	}
		215
		216	sub do_get_tile_id {
		217	my ($name, $cb) = @_;
		218
		219	my $table = table "facemap";
		220	my $id;
		221
		222	db_get $table, undef, $name => $id, 0;
		223	$! or return $cb->($id);
		224
		225	unless ($TILE_SEQ) {
		226	$TILE_SEQ = $table->sequence;
		227	$TILE_SEQ->initial_value (FIRST_TILE_ID);
		228	$TILE_SEQ->set_cachesize (0);
		229	db_sequence_open $TILE_SEQ, undef, "id", BDB::CREATE;
		230	}
		231
		232	db_sequence_get $TILE_SEQ, undef, 1, my $id;
		233
		234	die "unable to allocate tile id: $!"
		235	if $!;
		236
		237	db_put $table, undef, $name => $id, 0;
		238	$cb->($id);
		239
		240	}
		241
		242	sub get_tile_id_sync($) {
		243	my ($name) = @_;
		244
		245	$facemap->{$name} \|\|= do {
		246	my $id;
		247	do_get_tile_id $name, sub {
		248	$id = $_[0];
		249	};
		250	BDB::flush;
		251	$id
		252	}
		253	}
		254
		255	#############################################################################
		256
		257	sub path_of_res($) {
		258	utf8::downgrade $_[0]; # bug in unpack "H*"
		259	"$DB_HOME/res-data-" . unpack "H*", $_[0]
		260	}
		261
		262	sub sync {
		263	# for debugging
		264	#DC::DB::Server::req (sync => sub { });
		265	DC::DB::Server::sync ();
		266	}
		267
		268	sub unlink($$) {
		269	DC::DB::Server::req (unlink => @_);
		270	}
		271
		272	sub read_file($$) {
		273	DC::DB::Server::req (read_file => @_);
		274	}
		275
		276	sub write_file($$$) {
		277	DC::DB::Server::req (write_file => @_);
		278	}
		279
		280	sub prefetch_file($$$) {
		281	DC::DB::Server::req (prefetch_file => @_);
		282	}
		283
		284	sub logprint($$$) {
		285	DC::DB::Server::req (logprint => @_);
		286	}
		287
		288	#############################################################################
		289
		290	package DC::DB::Server;
		291
		292	use common::sense;
		293
		294	use EV ();
		295	use Fcntl;
108		296
109	our %CB;	297	our %CB;
110	our $FH;	298	our $FH;
111	our $ID = "aaa0";	299	our $ID = "aaa0";
112	our ($fh_r_watcher, $fh_w_watcher);	300	our ($fh_r_watcher, $fh_w_watcher);
117	sub fh_write {	305	sub fh_write {
118	my $len = syswrite $FH, $write_buf;	306	my $len = syswrite $FH, $write_buf;
119		307
120	substr $write_buf, 0, $len, "";	308	substr $write_buf, 0, $len, "";
121		309
122	undef $fh_w_watcher	310	$fh_w_watcher->stop
123	unless length $write_buf;	311	unless length $write_buf;
124	}	312	}
125		313
126	sub fh_read {	314	sub fh_read {
127	my $status = sysread $FH, $read_buf, 16384, length $read_buf;	315	my $status = sysread $FH, $read_buf, 16384, length $read_buf;
…		…
163		351
164	my $id = ++$ID;	352	my $id = ++$ID;
165	$write_buf .= pack "N/a*", Storable::freeze [$id, $type, @args];	353	$write_buf .= pack "N/a*", Storable::freeze [$id, $type, @args];
166	$CB{$id} = $cb;	354	$CB{$id} = $cb;
167		355
168	$fh_w_watcher = AnyEvent->io (fh => $FH, poll => 'w', cb => \&fh_write);	356	$fh_w_watcher->start;
169	}	357	}
170		358
171	sub sync_tick {	359	sub do_unlink {
172	req "sync", sub { };	360	unlink $_[0];
173	$sync_timer = AnyEvent->timer (after => $SYNC_INTERVAL, cb => \&sync_tick);
174	}	361	}
175		362
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 => $data)
194	}
195
196	sub do_table {	363	sub do_read_file {
197	my ($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) = @_;	364	my ($path) = @_;
211		365
212	my $id;	366	utf8::downgrade $path;
213	my $table = table "facemap";	367	open my $fh, "<:raw", $path
		368	or return;
		369	sysread $fh, my $buf, -s $fh;
214		370
215	return $id	371	$buf
216	if $table->db_get ($hash, $id) == 0;	372	}
217		373
218	for (1..100) {	374	sub do_write_file {
219	my $txn = $DB_ENV->txn_begin;	375	my ($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		376
227	return $id;	377	utf8::downgrade $path;
228	}	378	utf8::downgrade $data;
		379	open my $fh, ">:raw", $path
		380	or return;
		381	syswrite $fh, $data;
		382	close $fh;
		383
		384	1
		385	}
		386
		387	sub do_prefetch_file {
		388	my ($path, $size) = @_;
		389
		390	utf8::downgrade $path;
		391	open my $fh, "<:raw", $path
		392	or return;
		393	sysread $fh, my $buf, $size;
		394
		395	1
		396	}
		397
		398	our %LOG_FH;
		399
		400	sub do_logprint {
		401	my ($path, $line) = @_;
		402
		403	$LOG_FH{$path} \|\|= do {
		404	open my $fh, ">>:utf8", $path
		405	or warn "Couldn't open logfile $path: $!";
		406
		407	$fh->autoflush (1);
		408
229	}	409	$fh
230	$txn->txn_abort;
231	}	410	};
232		411
233	die "maximum number of transaction retries reached - database problems?";	412	my ($sec, $min, $hour, $mday, $mon, $year) = localtime time;
		413
		414	my $ts = sprintf "%04d-%02d-%02d %02d:%02d:%02d",
		415	$year + 1900, $mon + 1, $mday, $hour, $min, $sec;
		416
		417	print { $LOG_FH{$path} } "$ts $line\n"
234	}	418	}
235		419
236	sub run {	420	sub run {
237	($FH, my $fh) = CFPlus::socketpipe;	421	($FH, my $fh) = AnyEvent::Util::portable_socketpair
		422	or die "unable to create database socketpair: $!";
238		423
239	my $oldfh = select $FH; $\| = 1; select $oldfh;	424	my $oldfh = select $FH; $\| = 1; select $oldfh;
240	my $oldfh = select $fh; $\| = 1; select $oldfh;	425	my $oldfh = select $fh; $\| = 1; select $oldfh;
241		426
242	my $pid = fork;	427	my $pid = fork;
243		428
244	if (defined $pid && !$pid) {	429	if (defined $pid && !$pid) {
		430	local $SIG{QUIT} = "IGNORE";
245	local $SIG{__DIE__};	431	local $SIG{__DIE__};
		432	local $SIG{__WARN__};
246	eval {	433	eval {
247	close $FH;	434	close $FH;
248
249	unless (eval { open_db }) {
250	File::Path::rmtree $DB_HOME;
251	open_db;
252	}
253		435
254	while () {	436	while () {
255	4 == read $fh, my $len, 4	437	4 == read $fh, my $len, 4
256	or last;	438	or last;
257	$len = unpack "N", $len;	439	$len = unpack "N", $len;
…		…
259	or die "unexpected eof while reading request";	441	or die "unexpected eof while reading request";
260		442
261	$req = Storable::thaw $req;	443	$req = Storable::thaw $req;
262		444
263	my ($id, $type, @args) = @$req;	445	my ($id, $type, @args) = @$req;
264	my $cb = CFPlus::DB::Server->can ("do_$type")	446	my $cb = DC::DB::Server->can ("do_$type")
265	or die "$type: unknown database request type\n";	447	or die "$type: unknown database request type\n";
266	my $res = pack "N/a*", Storable::freeze [$id, $cb->(@args)];	448	my $res = pack "N/a*", Storable::freeze [$id, $cb->(@args)];
267	(syswrite $fh, $res) == length $res	449	(syswrite $fh, $res) == length $res
268	or die;	450	or die "DB::write: $!";
269	}	451	}
270	};	452	};
271		453
272	my $error = $@;	454	my $error = $@;
273		455
274	eval {	456	eval {
275	undef %DB_TABLE;
276	undef $DB_ENV;
277
278	Storable::store_fd [die => $error], $fh;	457	Storable::store_fd [die => $error], $fh;
279	};	458	};
280		459
		460	warn $error
		461	if $error;
		462
281	CFPlus::_exit 0;	463	DC::_exit 0;
282	}	464	}
283		465
284	close $fh;	466	close $fh;
285	CFPlus::fh_nonblocking $FH, 1;	467	DC::fh_nonblocking $FH, 1;
286		468
287	$CB{die} = sub { die shift };	469	$CB{die} = sub { die shift };
288		470
289	$fh_r_watcher = AnyEvent->io (fh => $FH, poll => 'r', cb => \&fh_read);	471	$fh_r_watcher = EV::io $FH, EV::READ , \&fh_read;
		472	$fh_w_watcher = EV::io $FH, EV::WRITE, \&fh_write;
		473	}
290		474
291	sync_tick;	475	sub stop {
		476	close $FH;
		477	}
		478
		479	package DC::DB;
		480
		481	sub nuke_db {
		482	undef $DB_ENV;
		483	undef $DB_ENV_FH;
		484
		485	File::Path::mkpath [$DB_HOME];
		486	eval { File::Path::rmtree $DB_HOME };
		487	}
		488
		489	sub open_db {
		490	unless (eval { try_open_db }) {
		491	warn "$@";#d#
		492	eval { nuke_db };
		493	try_open_db;
		494	}
		495
		496	# fetch the full face table first
		497	unless ($facemap) {
		498	do_table facemap => sub {
		499	$facemap = $_[0];
		500	delete $facemap->{id};
		501	my %maptile = reverse %$facemap;#d#
		502	if ((scalar keys %$facemap) != (scalar keys %maptile)) {#d#
		503	$facemap = { };#d#
		504	DC::error "FATAL: facemap is not a 1:1 mapping, please report this and delete your $DB_HOME directory!\n";#d#
		505	}#d#
		506	};
		507	}
		508
		509	$WATCHER = EV::io BDB::poll_fileno, EV::READ, \&BDB::poll_cb;
		510	$SYNC = EV::timer_ns 0, 60, sub {
		511	$_[0]->stop;
		512	db_env_txn_checkpoint $DB_ENV, 0, 0, 0, sub { };
		513	};
		514	}
		515
		516	END {
		517	db_env_txn_checkpoint $DB_ENV, 0, 0, 0
		518	if $DB_ENV;
		519
		520	undef $TILE_SEQ;
		521	%DB_TABLE = ();
		522	undef $DB_ENV;
292	}	523	}
293		524
294	1;	525	1;
295		526
296	=back	527	=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 1.45 by root, Sat Apr 3 02:58:24 2010 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 1.45 by root, Sat Apr 3 02:58:24 2010 UTC