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

Comparing deliantra/Deliantra-Client/DC/DB.pm (file contents):
Revision 1.6 by root, Mon Apr 16 21:06:37 2007 UTC vs.
Revision 1.44 by root, Sat Jan 10 20:56:34 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 ();
21	use AnyEvent ();
22	use Storable ();	22	use Storable ();
23		23	use AnyEvent::Util ();
24	use CFPlus;	24	use Config;
25		25	use BDB;
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;
		53	our $DB_ENV_FH;
68	our $DB_STATE;	54	our $DB_STATE;
69	our %DB_TABLE;	55	our %DB_TABLE;
		56	our $TILE_SEQ;
70		57
		58	sub all_databases {
		59	opendir my $fh, $DB_HOME
		60	or return;
		61
		62	grep !/^(?:\.\|log\.\|_)/, readdir $fh
		63	}
		64
		65	sub try_verify_env($) {
		66	my ($env) = @_;
		67
		68	open my $lock, "+>$DB_HOME/__lock"
		69	or die "__lock: $!";
		70
		71	flock $lock, &Fcntl::LOCK_EX
		72	or die "flock: $!";
		73
		74	# we look at the __db.register env file that has been created by now
		75	# and check for the number of registered processes - if there is
		76	# only one, we verify all databases, otherwise we skip this
		77	# we MUST NOT close the filehandle as longa swe keep the env open, as
		78	# this destroys the record locks on it.
		79	open $DB_ENV_FH, "<$DB_HOME/__db.register"
		80	or die "__db.register: $!";
		81
		82	# __db.register contains one record per process, with X signifying
		83	# empty records (of course, this is completely private to bdb...)
		84	my $count = grep /^[^X]/, <$DB_ENV_FH>;
		85
		86	if ($count == 1) {
		87	# if any databases are corrupted, we simply delete all of them
		88
		89	for (all_databases) {
		90	my $dbh = db_create $env
		91	or last;
		92
		93	# a failed verify will panic the environment, which is fine with us
		94	db_verify $dbh, "$DB_HOME/$_";
		95
		96	return if $!; # nuke database and recreate if verification failure
		97	}
		98
		99	}
		100
		101	# close probably cleans those up, but we also want to run on windows,
		102	# so better be safe.
		103	flock $lock, &Fcntl::LOCK_UN
		104	or die "funlock: $!";
		105
		106	1
		107	}
		108
71	sub open_db {	109	sub try_open_db {
72	mkdir $DB_HOME, 0777;	110	File::Path::mkpath [$DB_HOME];
73	my $recover = $BerkeleyDB::db_version >= 4.4	111
74	? eval "DB_REGISTER \| DB_RECOVER"	112	undef $DB_ENV;
		113	undef $DB_ENV_FH;
		114
		115	my $env = db_env_create;
		116
		117	$env->set_errfile (\*STDERR);
		118	$env->set_msgfile (\*STDERR);
		119	$env->set_verbose (-1, 1);
		120
		121	$env->set_flags (BDB::AUTO_COMMIT \| BDB::REGION_INIT);
		122	$env->set_flags (&BDB::LOG_AUTOREMOVE ) if BDB::VERSION v0, v4.7;
		123	$env->log_set_config (&BDB::LOG_AUTO_REMOVE) if BDB::VERSION v4.7;
		124
		125	$env->set_timeout (3, BDB::SET_TXN_TIMEOUT);
		126	$env->set_timeout (3, BDB::SET_LOCK_TIMEOUT);
		127
		128	$env->set_cachesize (0, 2048 * 1024, 0);
		129
		130	db_env_open $env, $DB_HOME,
		131	BDB::CREATE \| BDB::REGISTER \| BDB::RECOVER \| BDB::INIT_MPOOL \| BDB::INIT_LOCK \| BDB::INIT_TXN,
75	: 0;	132	0666;
76		133
77	$DB_ENV = new BerkeleyDB::Env	134	$! and die "cannot open database environment $DB_HOME: " . BDB::strerror;
78	-Home => $DB_HOME,	135
79	-Cachesize => 8_000_000,	136	# now we go through the registered processes, if there is only one, we verify all files
80	-ErrFile => "$DB_HOME/errorlog.txt",	137	# to make sure windows didn'T corrupt them (as windows does....)
81	# -ErrPrefix => "DATABASE",	138	try_verify_env $env
82	-Verbose => 1,	139	or die "database environment failed verification";
83	-Flags => DB_CREATE \| DB_RECOVER \| DB_INIT_MPOOL \| DB_INIT_LOCK \| DB_INIT_TXN \| $recover,	140
84	-SetFlags => DB_AUTO_COMMIT \| DB_LOG_AUTOREMOVE,	141	$DB_ENV = $env;
85	or die "unable to create/open database home $DB_HOME: $BerkeleyDB::Error";
86		142
87	1	143	1
88	}	144	}
89		145
90	sub table($) {	146	sub table($) {
91	$DB_TABLE{$_[0]} \|\|= do {	147	$DB_TABLE{$_[0]} \|\|= do {
92	my ($table) = @_;	148	my ($table) = @_;
93		149
94	$table =~ s/([^a-zA-Z0-9_\-])/sprintf "=%x=", ord $1/ge;	150	$table =~ s/([^a-zA-Z0-9_\-])/sprintf "=%x=", ord $1/ge;
95		151
96	new BerkeleyDB::Btree	152	$DB_ENV#d#
97	-Env => $DB_ENV,	153	or return ::clienterror ("trying to create table $_[0] with empty db_env $DB_ENV" => 1);#d#
98	-Filename => $table,	154
99	# -Filename => "database",	155	my $db = db_create $DB_ENV;
100	# -Subname => $table,	156	$db->set_flags (BDB::CHKSUM);
101	-Property => DB_CHKSUM,	157
102	-Flags => DB_CREATE \| DB_UPGRADE,	158	db_open $db, undef, $table, undef, BDB::BTREE,
103	or die "unable to create/open database table $_[0]: $BerkeleyDB::Error"	159	BDB::AUTO_COMMIT \| BDB::CREATE \| BDB::READ_UNCOMMITTED, 0666;
		160
		161	$! and "unable to open/create database table $_[0]: ". BDB::strerror;
		162
		163	$db
		164	}
		165	}
		166
		167	#############################################################################
		168
		169	our $WATCHER;
		170	our $SYNC;
		171	our $facemap;
		172
		173	sub exists($$$) {
		174	my ($db, $key, $cb) = @_;
		175
		176	my $data;
		177	db_get table $db, undef, $key, $data, 0, sub {
		178	$cb->($! ? () : length $data);
104	}	179	};
105	}	180	}
106		181
107	our $SYNC_INTERVAL = 60;	182	sub get($$$) {
		183	my ($db, $key, $cb) = @_;
		184
		185	my $data;
		186	db_get table $db, undef, $key, $data, 0, sub {
		187	$cb->($! ? () : $data);
		188	};
		189	}
		190
		191	sub put($$$$) {
		192	my ($db, $key, $data, $cb) = @_;
		193
		194	db_put table $db, undef, $key, $data, 0, sub {
		195	$cb->($!);
		196	$SYNC->again unless $SYNC->is_active;
		197	};
		198	}
		199
		200	sub do_table {
		201	my ($db, $cb) = @_;
		202
		203	$db = table $db;
		204
		205	my $cursor = $db->cursor;
		206	my %kv;
		207
		208	for (;;) {
		209	db_c_get $cursor, my $k, my $v, BDB::NEXT;
		210	last if $!;
		211	$kv{$k} = $v;
		212	}
		213
		214	$cb->(\%kv);
		215	}
		216
		217	sub do_get_tile_id {
		218	my ($name, $cb) = @_;
		219
		220	my $table = table "facemap";
		221	my $id;
		222
		223	db_get $table, undef, $name => $id, 0;
		224	$! or return $cb->($id);
		225
		226	unless ($TILE_SEQ) {
		227	$TILE_SEQ = $table->sequence;
		228	$TILE_SEQ->initial_value (FIRST_TILE_ID);
		229	$TILE_SEQ->set_cachesize (0);
		230	db_sequence_open $TILE_SEQ, undef, "id", BDB::CREATE;
		231	}
		232
		233	db_sequence_get $TILE_SEQ, undef, 1, my $id;
		234
		235	die "unable to allocate tile id: $!"
		236	if $!;
		237
		238	db_put $table, undef, $name => $id, 0;
		239	$cb->($id);
		240
		241	}
		242
		243	sub get_tile_id_sync($) {
		244	my ($name) = @_;
		245
		246	$facemap->{$name} \|\|= do {
		247	my $id;
		248	do_get_tile_id $name, sub {
		249	$id = $_[0];
		250	};
		251	BDB::flush;
		252	$id
		253	}
		254	}
		255
		256	#############################################################################
		257
		258	sub path_of_res($) {
		259	utf8::downgrade $_[0]; # bug in unpack "H*"
		260	"$DB_HOME/res-data-" . unpack "H*", $_[0]
		261	}
		262
		263	sub sync {
		264	# for debugging
		265	#DC::DB::Server::req (sync => sub { });
		266	DC::DB::Server::sync ();
		267	}
		268
		269	sub unlink($$) {
		270	DC::DB::Server::req (unlink => @_);
		271	}
		272
		273	sub read_file($$) {
		274	DC::DB::Server::req (read_file => @_);
		275	}
		276
		277	sub write_file($$$) {
		278	DC::DB::Server::req (write_file => @_);
		279	}
		280
		281	sub prefetch_file($$$) {
		282	DC::DB::Server::req (prefetch_file => @_);
		283	}
		284
		285	sub logprint($$$) {
		286	DC::DB::Server::req (logprint => @_);
		287	}
		288
		289	#############################################################################
		290
		291	package DC::DB::Server;
		292
		293	use strict;
		294
		295	use EV ();
		296	use Fcntl;
108		297
109	our %CB;	298	our %CB;
110	our $FH;	299	our $FH;
111	our $ID = "aaa0";	300	our $ID = "aaa0";
112	our ($fh_r_watcher, $fh_w_watcher);	301	our ($fh_r_watcher, $fh_w_watcher);
117	sub fh_write {	306	sub fh_write {
118	my $len = syswrite $FH, $write_buf;	307	my $len = syswrite $FH, $write_buf;
119		308
120	substr $write_buf, 0, $len, "";	309	substr $write_buf, 0, $len, "";
121		310
122	undef $fh_w_watcher	311	$fh_w_watcher->stop
123	unless length $write_buf;	312	unless length $write_buf;
124	}	313	}
125		314
126	sub fh_read {	315	sub fh_read {
127	my $status = sysread $FH, $read_buf, 16384, length $read_buf;	316	my $status = sysread $FH, $read_buf, 16384, length $read_buf;
…		…
163		352
164	my $id = ++$ID;	353	my $id = ++$ID;
165	$write_buf .= pack "N/a*", Storable::freeze [$id, $type, @args];	354	$write_buf .= pack "N/a*", Storable::freeze [$id, $type, @args];
166	$CB{$id} = $cb;	355	$CB{$id} = $cb;
167		356
168	$fh_w_watcher = AnyEvent->io (fh => $FH, poll => 'w', cb => \&fh_write);	357	$fh_w_watcher->start;
169	}	358	}
170		359
171	sub sync_tick {	360	sub do_unlink {
172	req "sync", sub { };	361	unlink $_[0];
173	$sync_timer = AnyEvent->timer (after => $SYNC_INTERVAL, cb => \&sync_tick);
174	}	362	}
175		363
176	sub do_sync {	364	sub do_read_file {
177	$DB_ENV->txn_checkpoint (0, 0, 0);	365	my ($path) = @_;
178	()
179	}
180		366
181	sub do_get {
182	my ($db, $key) = @_;
183
184	utf8::downgrade $key;	367	utf8::downgrade $path;
185	my $data;	368	open my $fh, "<:raw", $path
186	(table $db)->db_get ($key, $data) == 0	369	or return;
187	? $data	370	sysread $fh, my $buf, -s $fh;
188	: ()
189	}
190		371
191	sub do_put {	372	$buf
		373	}
		374
		375	sub do_write_file {
192	my ($db, $key, $data) = @_;	376	my ($path, $data) = @_;
193		377
194	utf8::downgrade $key;	378	utf8::downgrade $path;
195	utf8::downgrade $data;	379	utf8::downgrade $data;
196	(table $db)->db_put ($key => $data)	380	open my $fh, ">:raw", $path
197	}	381	or return;
		382	syswrite $fh, $data;
		383	close $fh;
198		384
199	sub do_table {	385	1
200	my ($db) = @_;
201
202	$db = table $db;
203
204	my $cursor = $db->db_cursor;
205	my %kv;
206	my ($k, $v);
207	$kv{$k} = $v while $cursor->c_get ($k, $v, BerkeleyDB::DB_NEXT) == 0;
208
209	\%kv
210	}	386	}
211		387
212	sub do_get_tile_id {	388	sub do_prefetch_file {
213	my ($hash) = @_;	389	my ($path, $size) = @_;
214		390
215	my $id;	391	utf8::downgrade $path;
216	my $table = table "facemap";	392	open my $fh, "<:raw", $path
		393	or return;
		394	sysread $fh, my $buf, $size;
217		395
218	return $id	396	1
219	if $table->db_get ($hash, $id) == 0;	397	}
220		398
221	for (1..100) {	399	our %LOG_FH;
222	my $txn = $DB_ENV->txn_begin;
223	my $status = $table->db_get (id => $id);
224	if ($status == 0 \|\| $status == BerkeleyDB::DB_NOTFOUND) {
225	$id = ($id \|\| 64) + 1;
226	if ($table->db_put (id => $id) == 0
227	&& $table->db_put ($hash => $id) == 0) {
228	$txn->txn_commit;
229		400
230	return $id;	401	sub do_logprint {
231	}	402	my ($path, $line) = @_;
		403
		404	$LOG_FH{$path} \|\|= do {
		405	open my $fh, ">>:utf8", $path
		406	or warn "Couldn't open logfile $path: $!";
		407
		408	$fh->autoflush (1);
		409
232	}	410	$fh
233	$txn->txn_abort;
234	}	411	};
235		412
236	die "maximum number of transaction retries reached - database problems?";	413	my ($sec, $min, $hour, $mday, $mon, $year) = localtime time;
		414
		415	my $ts = sprintf "%04d-%02d-%02d %02d:%02d:%02d",
		416	$year + 1900, $mon + 1, $mday, $hour, $min, $sec;
		417
		418	print { $LOG_FH{$path} } "$ts $line\n"
237	}	419	}
238		420
239	sub run {	421	sub run {
240	($FH, my $fh) = CFPlus::socketpipe;	422	($FH, my $fh) = AnyEvent::Util::portable_socketpair
		423	or die "unable to create database socketpair: $!";
241		424
242	my $oldfh = select $FH; $\| = 1; select $oldfh;	425	my $oldfh = select $FH; $\| = 1; select $oldfh;
243	my $oldfh = select $fh; $\| = 1; select $oldfh;	426	my $oldfh = select $fh; $\| = 1; select $oldfh;
244		427
245	my $pid = fork;	428	my $pid = fork;
246		429
247	if (defined $pid && !$pid) {	430	if (defined $pid && !$pid) {
		431	local $SIG{QUIT} = "IGNORE";
248	local $SIG{__DIE__};	432	local $SIG{__DIE__};
		433	local $SIG{__WARN__};
249	eval {	434	eval {
250	close $FH;	435	close $FH;
251
252	unless (eval { open_db }) {
253	eval { File::Path::rmtree $DB_HOME };
254	open_db;
255	}
256		436
257	while () {	437	while () {
258	4 == read $fh, my $len, 4	438	4 == read $fh, my $len, 4
259	or last;	439	or last;
260	$len = unpack "N", $len;	440	$len = unpack "N", $len;
…		…
262	or die "unexpected eof while reading request";	442	or die "unexpected eof while reading request";
263		443
264	$req = Storable::thaw $req;	444	$req = Storable::thaw $req;
265		445
266	my ($id, $type, @args) = @$req;	446	my ($id, $type, @args) = @$req;
267	my $cb = CFPlus::DB::Server->can ("do_$type")	447	my $cb = DC::DB::Server->can ("do_$type")
268	or die "$type: unknown database request type\n";	448	or die "$type: unknown database request type\n";
269	my $res = pack "N/a*", Storable::freeze [$id, $cb->(@args)];	449	my $res = pack "N/a*", Storable::freeze [$id, $cb->(@args)];
270	(syswrite $fh, $res) == length $res	450	(syswrite $fh, $res) == length $res
271	or die;	451	or die "DB::write: $!";
272	}	452	}
273	};	453	};
274		454
275	my $error = $@;	455	my $error = $@;
276		456
277	eval {	457	eval {
278	undef %DB_TABLE;
279	undef $DB_ENV;
280
281	Storable::store_fd [die => $error], $fh;	458	Storable::store_fd [die => $error], $fh;
282	};	459	};
283		460
		461	warn $error
		462	if $error;
		463
284	CFPlus::_exit 0;	464	DC::_exit 0;
285	}	465	}
286		466
287	close $fh;	467	close $fh;
288	CFPlus::fh_nonblocking $FH, 1;	468	DC::fh_nonblocking $FH, 1;
289		469
290	$CB{die} = sub { die shift };	470	$CB{die} = sub { die shift };
291		471
292	$fh_r_watcher = AnyEvent->io (fh => $FH, poll => 'r', cb => \&fh_read);	472	$fh_r_watcher = EV::io $FH, EV::READ , \&fh_read;
293		473	$fh_w_watcher = EV::io $FH, EV::WRITE, \&fh_write;
294	sync_tick;
295	}	474	}
296		475
297	sub stop {	476	sub stop {
298	close $FH;	477	close $FH;
299	}	478	}
300		479
		480	package DC::DB;
		481
		482	sub nuke_db {
		483	undef $DB_ENV;
		484	undef $DB_ENV_FH;
		485
		486	File::Path::mkpath [$DB_HOME];
		487	eval { File::Path::rmtree $DB_HOME };
		488	}
		489
		490	sub open_db {
		491	unless (eval { try_open_db }) {
		492	warn "$@";#d#
		493	eval { nuke_db };
		494	try_open_db;
		495	}
		496
		497	# fetch the full face table first
		498	unless ($facemap) {
		499	do_table facemap => sub {
		500	$facemap = $_[0];
		501	delete $facemap->{id};
		502	my %maptile = reverse %$facemap;#d#
		503	if ((scalar keys %$facemap) != (scalar keys %maptile)) {#d#
		504	$facemap = { };#d#
		505	DC::error "FATAL: facemap is not a 1:1 mapping, please report this and delete your $DB_HOME directory!\n";#d#
		506	}#d#
		507	};
		508	}
		509
		510	$WATCHER = EV::io BDB::poll_fileno, EV::READ, \&BDB::poll_cb;
		511	$SYNC = EV::timer_ns 0, 60, sub {
		512	$_[0]->stop;
		513	db_env_txn_checkpoint $DB_ENV, 0, 0, 0, sub { };
		514	};
		515	}
		516
		517	END {
		518	db_env_txn_checkpoint $DB_ENV, 0, 0, 0
		519	if $DB_ENV;
		520
		521	undef $TILE_SEQ;
		522	%DB_TABLE = ();
		523	undef $DB_ENV;
		524	}
		525
301	1;	526	1;
302		527
303	=back	528	=back
304		529
305	=head1 AUTHOR	530	=head1 AUTHOR

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Comparing deliantra/Deliantra-Client/DC/DB.pm (file contents): Revision 1.6 by root, Mon Apr 16 21:06:37 2007 UTC vs. Revision 1.44 by root, Sat Jan 10 20:56:34 2009 UTC

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Comparing deliantra/Deliantra-Client/DC/DB.pm (file contents):
Revision 1.6 by root, Mon Apr 16 21:06:37 2007 UTC vs.
Revision 1.44 by root, Sat Jan 10 20:56:34 2009 UTC