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1.1 |
=head1 NAME |
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1.31 |
DC::DB - async. database and filesystem access for deliantra |
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1.1 |
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=head1 SYNOPSIS |
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1.29 |
use DC::DB; |
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1.1 |
|
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=head1 DESCRIPTION |
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=over 4 |
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=cut |
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1.29 |
package DC::DB; |
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1.1 |
|
17 |
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1.45 |
use common::sense; |
18 |
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1.1 |
|
19 |
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1.35 |
use File::Path (); |
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1.1 |
use Carp (); |
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1.5 |
use Storable (); |
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1.42 |
use AnyEvent::Util (); |
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1.9 |
use Config; |
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1.24 |
use BDB; |
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1.43 |
use Fcntl (); |
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1.1 |
|
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1.29 |
use DC; |
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1.3 |
|
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1.38 |
our $ODBDIR = "cfplus-" . BDB::VERSION_MAJOR . "." . BDB::VERSION_MINOR . "-$Config{archname}"; |
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our $DBDIR = "client-" . BDB::VERSION_MAJOR . "." . BDB::VERSION_MINOR . "-$Config{archname}"; |
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1.27 |
our $DB_HOME = "$Deliantra::VARDIR/$DBDIR"; |
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1.40 |
sub FIRST_TILE_ID () { 64 } |
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35 |
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1.35 |
unless (-d $DB_HOME) { |
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if (-d "$Deliantra::VARDIR/$ODBDIR") { |
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rename "$Deliantra::VARDIR/$ODBDIR", $DB_HOME; |
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print STDERR "INFO: moved old database from $Deliantra::VARDIR/$ODBDIR to $DB_HOME\n"; |
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} elsif (-d "$Deliantra::OLDDIR/$ODBDIR") { |
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rename "$Deliantra::OLDDIR/$DBDIR", $DB_HOME; |
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print STDERR "INFO: moved old database from $Deliantra::OLDDIR/$ODBDIR to $DB_HOME\n"; |
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} else { |
43 |
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File::Path::mkpath [$DB_HOME] |
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or die "unable to create database directory $DB_HOME: $!"; |
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} |
46 |
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1.27 |
} |
47 |
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1.9 |
|
48 |
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1.30 |
BDB::max_poll_time 0.03; |
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1.32 |
BDB::max_parallel 1; |
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1.30 |
|
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1.24 |
our $DB_ENV; |
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1.44 |
our $DB_ENV_FH; |
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1.24 |
our $DB_STATE; |
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our %DB_TABLE; |
55 |
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1.35 |
our $TILE_SEQ; |
56 |
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1.24 |
|
57 |
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1.43 |
sub all_databases { |
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opendir my $fh, $DB_HOME |
59 |
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or return; |
60 |
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grep !/^(?:\.|log\.|_)/, readdir $fh |
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} |
63 |
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64 |
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sub try_verify_env($) { |
65 |
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my ($env) = @_; |
66 |
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open my $lock, "+>$DB_HOME/__lock" |
68 |
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or die "__lock: $!"; |
69 |
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flock $lock, &Fcntl::LOCK_EX |
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or die "flock: $!"; |
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1.44 |
# we look at the __db.register env file that has been created by now |
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# and check for the number of registered processes - if there is |
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# only one, we verify all databases, otherwise we skip this |
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# we MUST NOT close the filehandle as longa swe keep the env open, as |
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# this destroys the record locks on it. |
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open $DB_ENV_FH, "<$DB_HOME/__db.register" |
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or die "__db.register: $!"; |
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1.43 |
# __db.register contains one record per process, with X signifying |
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# empty records (of course, this is completely private to bdb...) |
83 |
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1.44 |
my $count = grep /^[^X]/, <$DB_ENV_FH>; |
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1.43 |
|
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if ($count == 1) { |
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# if any databases are corrupted, we simply delete all of them |
87 |
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for (all_databases) { |
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my $dbh = db_create $env |
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or last; |
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# a failed verify will panic the environment, which is fine with us |
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db_verify $dbh, "$DB_HOME/$_"; |
94 |
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return if $!; # nuke database and recreate if verification failure |
96 |
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} |
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} |
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# close probably cleans those up, but we also want to run on windows, |
101 |
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# so better be safe. |
102 |
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flock $lock, &Fcntl::LOCK_UN |
103 |
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or die "funlock: $!"; |
104 |
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105 |
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1 |
106 |
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} |
107 |
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1.33 |
sub try_open_db { |
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1.35 |
File::Path::mkpath [$DB_HOME]; |
110 |
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1.24 |
|
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1.44 |
undef $DB_ENV; |
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undef $DB_ENV_FH; |
113 |
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1.36 |
my $env = db_env_create; |
115 |
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1.24 |
|
116 |
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1.36 |
$env->set_errfile (\*STDERR); |
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$env->set_msgfile (\*STDERR); |
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$env->set_verbose (-1, 1); |
119 |
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1.24 |
|
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1.39 |
$env->set_flags (BDB::AUTO_COMMIT | BDB::REGION_INIT); |
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$env->set_flags (&BDB::LOG_AUTOREMOVE ) if BDB::VERSION v0, v4.7; |
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$env->log_set_config (&BDB::LOG_AUTO_REMOVE) if BDB::VERSION v4.7; |
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$env->set_timeout (3, BDB::SET_TXN_TIMEOUT); |
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$env->set_timeout (3, BDB::SET_LOCK_TIMEOUT); |
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1.36 |
$env->set_cachesize (0, 2048 * 1024, 0); |
128 |
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1.24 |
|
129 |
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1.36 |
db_env_open $env, $DB_HOME, |
130 |
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1.24 |
BDB::CREATE | BDB::REGISTER | BDB::RECOVER | BDB::INIT_MPOOL | BDB::INIT_LOCK | BDB::INIT_TXN, |
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0666; |
132 |
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$! and die "cannot open database environment $DB_HOME: " . BDB::strerror; |
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1.43 |
# now we go through the registered processes, if there is only one, we verify all files |
136 |
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# to make sure windows didn'T corrupt them (as windows does....) |
137 |
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try_verify_env $env |
138 |
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or die "database environment failed verification"; |
139 |
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140 |
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1.36 |
$DB_ENV = $env; |
141 |
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1.24 |
1 |
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} |
144 |
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145 |
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sub table($) { |
146 |
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$DB_TABLE{$_[0]} ||= do { |
147 |
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my ($table) = @_; |
148 |
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149 |
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$table =~ s/([^a-zA-Z0-9_\-])/sprintf "=%x=", ord $1/ge; |
150 |
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1.41 |
$DB_ENV#d# |
152 |
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or return ::clienterror ("trying to create table $_[0] with empty db_env $DB_ENV" => 1);#d# |
153 |
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154 |
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1.24 |
my $db = db_create $DB_ENV; |
155 |
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$db->set_flags (BDB::CHKSUM); |
156 |
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157 |
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db_open $db, undef, $table, undef, BDB::BTREE, |
158 |
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BDB::AUTO_COMMIT | BDB::CREATE | BDB::READ_UNCOMMITTED, 0666; |
159 |
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160 |
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$! and "unable to open/create database table $_[0]: ". BDB::strerror; |
161 |
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162 |
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$db |
163 |
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} |
164 |
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1.9 |
} |
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1.24 |
############################################################################# |
167 |
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168 |
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1.33 |
our $WATCHER; |
169 |
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our $SYNC; |
170 |
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1.34 |
our $facemap; |
171 |
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1.24 |
|
172 |
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1.9 |
sub exists($$$) { |
173 |
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1.24 |
my ($db, $key, $cb) = @_; |
174 |
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175 |
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my $data; |
176 |
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db_get table $db, undef, $key, $data, 0, sub { |
177 |
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$cb->($! ? () : length $data); |
178 |
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}; |
179 |
root |
1.9 |
} |
180 |
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181 |
root |
1.1 |
sub get($$$) { |
182 |
root |
1.24 |
my ($db, $key, $cb) = @_; |
183 |
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184 |
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my $data; |
185 |
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db_get table $db, undef, $key, $data, 0, sub { |
186 |
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$cb->($! ? () : $data); |
187 |
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}; |
188 |
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1.1 |
} |
189 |
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190 |
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sub put($$$$) { |
191 |
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1.24 |
my ($db, $key, $data, $cb) = @_; |
192 |
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193 |
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db_put table $db, undef, $key, $data, 0, sub { |
194 |
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$cb->($!); |
195 |
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$SYNC->again unless $SYNC->is_active; |
196 |
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}; |
197 |
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1.1 |
} |
198 |
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199 |
root |
1.24 |
sub do_table { |
200 |
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my ($db, $cb) = @_; |
201 |
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202 |
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$db = table $db; |
203 |
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204 |
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my $cursor = $db->cursor; |
205 |
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my %kv; |
206 |
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207 |
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for (;;) { |
208 |
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db_c_get $cursor, my $k, my $v, BDB::NEXT; |
209 |
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last if $!; |
210 |
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$kv{$k} = $v; |
211 |
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} |
212 |
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213 |
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$cb->(\%kv); |
214 |
root |
1.9 |
} |
215 |
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216 |
root |
1.24 |
sub do_get_tile_id { |
217 |
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my ($name, $cb) = @_; |
218 |
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219 |
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my $table = table "facemap"; |
220 |
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my $id; |
221 |
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222 |
root |
1.35 |
db_get $table, undef, $name => $id, 0; |
223 |
root |
1.34 |
$! or return $cb->($id); |
224 |
root |
1.24 |
|
225 |
root |
1.35 |
unless ($TILE_SEQ) { |
226 |
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$TILE_SEQ = $table->sequence; |
227 |
root |
1.40 |
$TILE_SEQ->initial_value (FIRST_TILE_ID); |
228 |
root |
1.35 |
$TILE_SEQ->set_cachesize (0); |
229 |
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db_sequence_open $TILE_SEQ, undef, "id", BDB::CREATE; |
230 |
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} |
231 |
root |
1.24 |
|
232 |
root |
1.35 |
db_sequence_get $TILE_SEQ, undef, 1, my $id; |
233 |
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1.24 |
|
234 |
root |
1.35 |
die "unable to allocate tile id: $!" |
235 |
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if $!; |
236 |
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237 |
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db_put $table, undef, $name => $id, 0; |
238 |
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$cb->($id); |
239 |
root |
1.24 |
|
240 |
root |
1.15 |
} |
241 |
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242 |
root |
1.1 |
sub get_tile_id_sync($) { |
243 |
root |
1.20 |
my ($name) = @_; |
244 |
root |
1.1 |
|
245 |
root |
1.34 |
$facemap->{$name} ||= do { |
246 |
root |
1.1 |
my $id; |
247 |
root |
1.24 |
do_get_tile_id $name, sub { |
248 |
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$id = $_[0]; |
249 |
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}; |
250 |
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BDB::flush; |
251 |
root |
1.1 |
$id |
252 |
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} |
253 |
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} |
254 |
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255 |
root |
1.24 |
############################################################################# |
256 |
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257 |
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sub path_of_res($) { |
258 |
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utf8::downgrade $_[0]; # bug in unpack "H*" |
259 |
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"$DB_HOME/res-data-" . unpack "H*", $_[0] |
260 |
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} |
261 |
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262 |
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sub sync { |
263 |
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# for debugging |
264 |
root |
1.29 |
#DC::DB::Server::req (sync => sub { }); |
265 |
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DC::DB::Server::sync (); |
266 |
root |
1.24 |
} |
267 |
root |
1.1 |
|
268 |
root |
1.24 |
sub unlink($$) { |
269 |
root |
1.29 |
DC::DB::Server::req (unlink => @_); |
270 |
root |
1.24 |
} |
271 |
root |
1.1 |
|
272 |
root |
1.24 |
sub read_file($$) { |
273 |
root |
1.29 |
DC::DB::Server::req (read_file => @_); |
274 |
root |
1.24 |
} |
275 |
root |
1.1 |
|
276 |
root |
1.24 |
sub write_file($$$) { |
277 |
root |
1.29 |
DC::DB::Server::req (write_file => @_); |
278 |
root |
1.24 |
} |
279 |
root |
1.1 |
|
280 |
root |
1.24 |
sub prefetch_file($$$) { |
281 |
root |
1.29 |
DC::DB::Server::req (prefetch_file => @_); |
282 |
root |
1.24 |
} |
283 |
root |
1.1 |
|
284 |
root |
1.24 |
sub logprint($$$) { |
285 |
root |
1.29 |
DC::DB::Server::req (logprint => @_); |
286 |
root |
1.1 |
} |
287 |
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288 |
root |
1.30 |
############################################################################# |
289 |
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290 |
root |
1.29 |
package DC::DB::Server; |
291 |
root |
1.1 |
|
292 |
root |
1.45 |
use common::sense; |
293 |
root |
1.1 |
|
294 |
root |
1.24 |
use EV (); |
295 |
|
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use Fcntl; |
296 |
root |
1.1 |
|
297 |
|
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our %CB; |
298 |
|
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our $FH; |
299 |
|
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our $ID = "aaa0"; |
300 |
|
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our ($fh_r_watcher, $fh_w_watcher); |
301 |
|
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our $sync_timer; |
302 |
|
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our $write_buf; |
303 |
|
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our $read_buf; |
304 |
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305 |
|
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sub fh_write { |
306 |
|
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my $len = syswrite $FH, $write_buf; |
307 |
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|
308 |
|
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substr $write_buf, 0, $len, ""; |
309 |
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|
310 |
root |
1.14 |
$fh_w_watcher->stop |
311 |
root |
1.1 |
unless length $write_buf; |
312 |
|
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} |
313 |
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314 |
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sub fh_read { |
315 |
|
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my $status = sysread $FH, $read_buf, 16384, length $read_buf; |
316 |
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|
317 |
|
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die "FATAL: database process died\n" |
318 |
|
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if $status == 0 && defined $status; |
319 |
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|
320 |
|
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while () { |
321 |
|
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return if 4 > length $read_buf; |
322 |
|
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my $len = unpack "N", $read_buf; |
323 |
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|
324 |
|
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return if $len + 4 > length $read_buf; |
325 |
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|
326 |
|
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substr $read_buf, 0, 4, ""; |
327 |
|
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my $res = Storable::thaw substr $read_buf, 0, $len, ""; |
328 |
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|
329 |
|
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my ($id, @args) = @$res; |
330 |
|
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(delete $CB{$id})->(@args); |
331 |
|
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} |
332 |
|
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} |
333 |
|
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|
334 |
|
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sub sync { |
335 |
|
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# biggest mess evarr |
336 |
|
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my $fds; (vec $fds, fileno $FH, 1) = 1; |
337 |
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|
338 |
|
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while (1 < scalar keys %CB) { |
339 |
|
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my $r = $fds; |
340 |
|
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my $w = length $write_buf ? $fds : undef; |
341 |
|
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select $r, $w, undef, undef; |
342 |
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343 |
|
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fh_write if vec $w, fileno $FH, 1; |
344 |
|
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fh_read if vec $r, fileno $FH, 1; |
345 |
|
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} |
346 |
|
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} |
347 |
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348 |
|
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sub req { |
349 |
|
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my ($type, @args) = @_; |
350 |
|
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my $cb = pop @args; |
351 |
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352 |
|
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my $id = ++$ID; |
353 |
|
|
$write_buf .= pack "N/a*", Storable::freeze [$id, $type, @args]; |
354 |
|
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$CB{$id} = $cb; |
355 |
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|
356 |
root |
1.14 |
$fh_w_watcher->start; |
357 |
root |
1.1 |
} |
358 |
|
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|
359 |
root |
1.9 |
sub do_unlink { |
360 |
|
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unlink $_[0]; |
361 |
|
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} |
362 |
|
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|
363 |
root |
1.16 |
sub do_read_file { |
364 |
|
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my ($path) = @_; |
365 |
|
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|
366 |
|
|
utf8::downgrade $path; |
367 |
|
|
open my $fh, "<:raw", $path |
368 |
|
|
or return; |
369 |
|
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sysread $fh, my $buf, -s $fh; |
370 |
|
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|
371 |
|
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$buf |
372 |
|
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} |
373 |
|
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|
374 |
root |
1.9 |
sub do_write_file { |
375 |
root |
1.16 |
my ($path, $data) = @_; |
376 |
root |
1.9 |
|
377 |
root |
1.16 |
utf8::downgrade $path; |
378 |
root |
1.9 |
utf8::downgrade $data; |
379 |
root |
1.16 |
open my $fh, ">:raw", $path |
380 |
root |
1.9 |
or return; |
381 |
root |
1.16 |
syswrite $fh, $data; |
382 |
root |
1.9 |
close $fh; |
383 |
|
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|
384 |
|
|
1 |
385 |
|
|
} |
386 |
|
|
|
387 |
root |
1.11 |
sub do_prefetch_file { |
388 |
root |
1.16 |
my ($path, $size) = @_; |
389 |
root |
1.11 |
|
390 |
root |
1.16 |
utf8::downgrade $path; |
391 |
|
|
open my $fh, "<:raw", $path |
392 |
root |
1.11 |
or return; |
393 |
|
|
sysread $fh, my $buf, $size; |
394 |
|
|
|
395 |
|
|
1 |
396 |
|
|
} |
397 |
|
|
|
398 |
root |
1.15 |
our %LOG_FH; |
399 |
|
|
|
400 |
|
|
sub do_logprint { |
401 |
|
|
my ($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 |
|
|
|
409 |
|
|
$fh |
410 |
|
|
}; |
411 |
|
|
|
412 |
|
|
my ($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 $line\n" |
418 |
|
|
} |
419 |
|
|
|
420 |
root |
1.1 |
sub run { |
421 |
root |
1.42 |
($FH, my $fh) = AnyEvent::Util::portable_socketpair |
422 |
|
|
or die "unable to create database socketpair: $!"; |
423 |
root |
1.1 |
|
424 |
|
|
my $oldfh = select $FH; $| = 1; select $oldfh; |
425 |
|
|
my $oldfh = select $fh; $| = 1; select $oldfh; |
426 |
|
|
|
427 |
|
|
my $pid = fork; |
428 |
|
|
|
429 |
|
|
if (defined $pid && !$pid) { |
430 |
root |
1.30 |
local $SIG{QUIT} = "IGNORE"; |
431 |
root |
1.1 |
local $SIG{__DIE__}; |
432 |
root |
1.15 |
local $SIG{__WARN__}; |
433 |
root |
1.1 |
eval { |
434 |
|
|
close $FH; |
435 |
|
|
|
436 |
|
|
while () { |
437 |
|
|
4 == read $fh, my $len, 4 |
438 |
|
|
or last; |
439 |
|
|
$len = unpack "N", $len; |
440 |
|
|
$len == read $fh, my $req, $len |
441 |
|
|
or die "unexpected eof while reading request"; |
442 |
|
|
|
443 |
|
|
$req = Storable::thaw $req; |
444 |
|
|
|
445 |
|
|
my ($id, $type, @args) = @$req; |
446 |
root |
1.29 |
my $cb = DC::DB::Server->can ("do_$type") |
447 |
root |
1.1 |
or die "$type: unknown database request type\n"; |
448 |
|
|
my $res = pack "N/a*", Storable::freeze [$id, $cb->(@args)]; |
449 |
|
|
(syswrite $fh, $res) == length $res |
450 |
root |
1.21 |
or die "DB::write: $!"; |
451 |
root |
1.1 |
} |
452 |
|
|
}; |
453 |
|
|
|
454 |
|
|
my $error = $@; |
455 |
|
|
|
456 |
|
|
eval { |
457 |
|
|
Storable::store_fd [die => $error], $fh; |
458 |
|
|
}; |
459 |
|
|
|
460 |
root |
1.25 |
warn $error |
461 |
|
|
if $error; |
462 |
root |
1.24 |
|
463 |
root |
1.29 |
DC::_exit 0; |
464 |
root |
1.1 |
} |
465 |
|
|
|
466 |
|
|
close $fh; |
467 |
root |
1.29 |
DC::fh_nonblocking $FH, 1; |
468 |
root |
1.1 |
|
469 |
root |
1.2 |
$CB{die} = sub { die shift }; |
470 |
root |
1.1 |
|
471 |
root |
1.21 |
$fh_r_watcher = EV::io $FH, EV::READ , \&fh_read; |
472 |
|
|
$fh_w_watcher = EV::io $FH, EV::WRITE, \&fh_write; |
473 |
root |
1.1 |
} |
474 |
|
|
|
475 |
root |
1.6 |
sub stop { |
476 |
|
|
close $FH; |
477 |
|
|
} |
478 |
|
|
|
479 |
root |
1.33 |
package DC::DB; |
480 |
|
|
|
481 |
root |
1.35 |
sub nuke_db { |
482 |
root |
1.44 |
undef $DB_ENV; |
483 |
|
|
undef $DB_ENV_FH; |
484 |
|
|
|
485 |
root |
1.35 |
File::Path::mkpath [$DB_HOME]; |
486 |
|
|
eval { File::Path::rmtree $DB_HOME }; |
487 |
|
|
} |
488 |
|
|
|
489 |
root |
1.33 |
sub open_db { |
490 |
|
|
unless (eval { try_open_db }) { |
491 |
|
|
warn "$@";#d# |
492 |
root |
1.35 |
eval { nuke_db }; |
493 |
root |
1.33 |
try_open_db; |
494 |
|
|
} |
495 |
|
|
|
496 |
|
|
# fetch the full face table first |
497 |
root |
1.34 |
unless ($facemap) { |
498 |
root |
1.33 |
do_table facemap => sub { |
499 |
root |
1.34 |
$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 |
root |
1.33 |
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 |
root |
1.37 |
db_env_txn_checkpoint $DB_ENV, 0, 0, 0 |
518 |
|
|
if $DB_ENV; |
519 |
|
|
|
520 |
root |
1.35 |
undef $TILE_SEQ; |
521 |
root |
1.33 |
%DB_TABLE = (); |
522 |
|
|
undef $DB_ENV; |
523 |
|
|
} |
524 |
|
|
|
525 |
root |
1.1 |
1; |
526 |
|
|
|
527 |
|
|
=back |
528 |
|
|
|
529 |
|
|
=head1 AUTHOR |
530 |
|
|
|
531 |
|
|
Marc Lehmann <schmorp@schmorp.de> |
532 |
|
|
http://home.schmorp.de/ |
533 |
|
|
|
534 |
|
|
=cut |
535 |
|
|
|