1 | =head1 NAME |
1 | =head1 NAME |
2 | |
2 | |
3 | CFPlus::DB - async. database and filesystem access for cfplus |
3 | DC::DB - async. database and filesystem access for cfplus |
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 Carp (); |
20 | use Carp (); |
21 | use Storable (); |
21 | use Storable (); |
22 | use Config; |
22 | use Config; |
23 | use Event (); |
23 | use BDB; |
24 | |
24 | |
25 | use CFPlus; |
25 | use DC; |
26 | |
26 | |
27 | our $DB_HOME = "$Crossfire::VARDIR/cfplus-$BerkeleyDB::db_version-$Config{archname}"; |
27 | our $DBDIR = "cfplus-" . BDB::VERSION . "-$Config{archname}"; |
|
|
28 | our $DB_HOME = "$Deliantra::VARDIR/$DBDIR"; |
|
|
29 | |
|
|
30 | if (!-e $DB_HOME and -e "$Deliantra::OLDDIR/$DBDIR") { |
|
|
31 | rename "$Deliantra::OLDDIR/$DBDIR", $DB_HOME; |
|
|
32 | print STDERR "INFO: moved old database from $Deliantra::OLDDIR/$DBDIR to $DB_HOME\n"; |
|
|
33 | } |
|
|
34 | |
|
|
35 | our $DB_ENV; |
|
|
36 | our $DB_STATE; |
|
|
37 | our %DB_TABLE; |
|
|
38 | |
|
|
39 | sub open_db { |
|
|
40 | mkdir $DB_HOME, 0777; |
|
|
41 | |
|
|
42 | $DB_ENV = db_env_create; |
|
|
43 | |
|
|
44 | $DB_ENV->set_errfile (\*STDERR); |
|
|
45 | $DB_ENV->set_msgfile (\*STDERR); |
|
|
46 | $DB_ENV->set_verbose (-1, 1); |
|
|
47 | |
|
|
48 | $DB_ENV->set_flags (BDB::AUTO_COMMIT | BDB::LOG_AUTOREMOVE | BDB::TXN_WRITE_NOSYNC); |
|
|
49 | $DB_ENV->set_cachesize (0, 2048 * 1024, 0); |
|
|
50 | |
|
|
51 | db_env_open $DB_ENV, $DB_HOME, |
|
|
52 | BDB::CREATE | BDB::REGISTER | BDB::RECOVER | BDB::INIT_MPOOL | BDB::INIT_LOCK | BDB::INIT_TXN, |
|
|
53 | 0666; |
|
|
54 | |
|
|
55 | $! and die "cannot open database environment $DB_HOME: " . BDB::strerror; |
|
|
56 | |
|
|
57 | 1 |
|
|
58 | } |
|
|
59 | |
|
|
60 | sub table($) { |
|
|
61 | $DB_TABLE{$_[0]} ||= do { |
|
|
62 | my ($table) = @_; |
|
|
63 | |
|
|
64 | $table =~ s/([^a-zA-Z0-9_\-])/sprintf "=%x=", ord $1/ge; |
|
|
65 | |
|
|
66 | my $db = db_create $DB_ENV; |
|
|
67 | $db->set_flags (BDB::CHKSUM); |
|
|
68 | |
|
|
69 | db_open $db, undef, $table, undef, BDB::BTREE, |
|
|
70 | BDB::AUTO_COMMIT | BDB::CREATE | BDB::READ_UNCOMMITTED, 0666; |
|
|
71 | |
|
|
72 | $! and "unable to open/create database table $_[0]: ". BDB::strerror; |
|
|
73 | |
|
|
74 | $db |
|
|
75 | } |
|
|
76 | } |
|
|
77 | |
|
|
78 | ############################################################################# |
|
|
79 | |
|
|
80 | unless (eval { open_db }) { |
|
|
81 | warn "$@";#d# |
|
|
82 | eval { File::Path::rmtree $DB_HOME }; |
|
|
83 | open_db; |
|
|
84 | } |
|
|
85 | |
|
|
86 | our $WATCHER = EV::io BDB::poll_fileno, EV::READ, \&BDB::poll_cb; |
|
|
87 | |
|
|
88 | our $SYNC = EV::timer_ns 0, 60, sub { |
|
|
89 | $_[0]->stop; |
|
|
90 | db_env_txn_checkpoint $DB_ENV, 0, 0, 0, sub { }; |
|
|
91 | }; |
|
|
92 | |
|
|
93 | our $tilemap; |
|
|
94 | |
|
|
95 | sub exists($$$) { |
|
|
96 | my ($db, $key, $cb) = @_; |
|
|
97 | |
|
|
98 | my $data; |
|
|
99 | db_get table $db, undef, $key, $data, 0, sub { |
|
|
100 | $cb->($! ? () : length $data); |
|
|
101 | }; |
|
|
102 | } |
|
|
103 | |
|
|
104 | sub get($$$) { |
|
|
105 | my ($db, $key, $cb) = @_; |
|
|
106 | |
|
|
107 | my $data; |
|
|
108 | db_get table $db, undef, $key, $data, 0, sub { |
|
|
109 | $cb->($! ? () : $data); |
|
|
110 | }; |
|
|
111 | } |
|
|
112 | |
|
|
113 | sub put($$$$) { |
|
|
114 | my ($db, $key, $data, $cb) = @_; |
|
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115 | |
|
|
116 | db_put table $db, undef, $key, $data, 0, sub { |
|
|
117 | $cb->($!); |
|
|
118 | $SYNC->again unless $SYNC->is_active; |
|
|
119 | }; |
|
|
120 | } |
|
|
121 | |
|
|
122 | sub do_table { |
|
|
123 | my ($db, $cb) = @_; |
|
|
124 | |
|
|
125 | $db = table $db; |
|
|
126 | |
|
|
127 | my $cursor = $db->cursor; |
|
|
128 | my %kv; |
|
|
129 | |
|
|
130 | for (;;) { |
|
|
131 | db_c_get $cursor, my $k, my $v, BDB::NEXT; |
|
|
132 | last if $!; |
|
|
133 | $kv{$k} = $v; |
|
|
134 | } |
|
|
135 | |
|
|
136 | $cb->(\%kv); |
|
|
137 | } |
|
|
138 | |
|
|
139 | sub do_get_tile_id { |
|
|
140 | my ($name, $cb) = @_; |
|
|
141 | |
|
|
142 | my $table = table "facemap"; |
|
|
143 | my $id; |
|
|
144 | |
|
|
145 | db_get $table, undef, $name, $id, 0; |
|
|
146 | return $cb->($id) unless $!; |
|
|
147 | |
|
|
148 | for (1..100) { |
|
|
149 | my $txn = $DB_ENV->txn_begin; |
|
|
150 | db_get $table, $txn, id => $id, 0; |
|
|
151 | |
|
|
152 | $id = 64 if $id < 64; |
|
|
153 | |
|
|
154 | ++$id; |
|
|
155 | |
|
|
156 | db_put $table, $txn, id => $id, 0; |
|
|
157 | db_txn_finish $txn; |
|
|
158 | |
|
|
159 | $SYNC->again unless $SYNC->is_active; |
|
|
160 | |
|
|
161 | return $cb->($id) unless $!; |
|
|
162 | |
|
|
163 | select undef, undef, undef, 0.01 * rand; |
|
|
164 | } |
|
|
165 | |
|
|
166 | die "maximum number of transaction retries reached - database problems?"; |
|
|
167 | } |
|
|
168 | |
|
|
169 | sub get_tile_id_sync($) { |
|
|
170 | my ($name) = @_; |
|
|
171 | |
|
|
172 | # fetch the full face table first |
|
|
173 | unless ($tilemap) { |
|
|
174 | do_table facemap => sub { |
|
|
175 | $tilemap = $_[0]; |
|
|
176 | delete $tilemap->{id}; |
|
|
177 | my %maptile = reverse %$tilemap;#d# |
|
|
178 | if ((scalar keys %$tilemap) != (scalar keys %maptile)) {#d# |
|
|
179 | $tilemap = { };#d# |
|
|
180 | DC::error "FATAL: facemap is not a 1:1 mapping, please report this and delete your $DB_HOME directory!\n";#d# |
|
|
181 | }#d# |
|
|
182 | }; |
|
|
183 | BDB::flush; |
|
|
184 | } |
|
|
185 | |
|
|
186 | $tilemap->{$name} ||= do { |
|
|
187 | my $id; |
|
|
188 | do_get_tile_id $name, sub { |
|
|
189 | $id = $_[0]; |
|
|
190 | }; |
|
|
191 | BDB::flush; |
|
|
192 | $id |
|
|
193 | } |
|
|
194 | } |
|
|
195 | |
|
|
196 | ############################################################################# |
28 | |
197 | |
29 | sub path_of_res($) { |
198 | sub path_of_res($) { |
30 | utf8::downgrade $_[0]; # bug in unpack "H*" |
199 | utf8::downgrade $_[0]; # bug in unpack "H*" |
31 | "$DB_HOME/res-data-" . unpack "H*", $_[0] |
200 | "$DB_HOME/res-data-" . unpack "H*", $_[0] |
32 | } |
201 | } |
33 | |
202 | |
34 | sub sync { |
203 | sub sync { |
35 | # for debugging |
204 | # for debugging |
36 | #CFPlus::DB::Server::req (sync => sub { }); |
205 | #DC::DB::Server::req (sync => sub { }); |
37 | CFPlus::DB::Server::sync (); |
206 | DC::DB::Server::sync (); |
38 | } |
|
|
39 | |
|
|
40 | sub exists($$$) { |
|
|
41 | CFPlus::DB::Server::req (exists => @_); |
|
|
42 | } |
|
|
43 | |
|
|
44 | sub get($$$) { |
|
|
45 | CFPlus::DB::Server::req (get => @_); |
|
|
46 | } |
|
|
47 | |
|
|
48 | sub put($$$$) { |
|
|
49 | CFPlus::DB::Server::req (put => @_); |
|
|
50 | } |
207 | } |
51 | |
208 | |
52 | sub unlink($$) { |
209 | sub unlink($$) { |
53 | CFPlus::DB::Server::req (unlink => @_); |
210 | DC::DB::Server::req (unlink => @_); |
54 | } |
211 | } |
55 | |
212 | |
56 | sub read_file($$) { |
213 | sub read_file($$) { |
57 | CFPlus::DB::Server::req (read_file => @_); |
214 | DC::DB::Server::req (read_file => @_); |
58 | } |
215 | } |
59 | |
216 | |
60 | sub write_file($$$) { |
217 | sub write_file($$$) { |
61 | CFPlus::DB::Server::req (write_file => @_); |
218 | DC::DB::Server::req (write_file => @_); |
62 | } |
219 | } |
63 | |
220 | |
64 | sub prefetch_file($$$) { |
221 | sub prefetch_file($$$) { |
65 | CFPlus::DB::Server::req (prefetch_file => @_); |
222 | DC::DB::Server::req (prefetch_file => @_); |
66 | } |
223 | } |
67 | |
224 | |
68 | sub logprint($$$) { |
225 | sub logprint($$$) { |
69 | CFPlus::DB::Server::req (logprint => @_); |
226 | DC::DB::Server::req (logprint => @_); |
70 | } |
227 | } |
71 | |
228 | |
72 | our $tilemap; |
|
|
73 | |
|
|
74 | sub get_tile_id_sync($) { |
|
|
75 | my ($hash) = @_; |
|
|
76 | |
|
|
77 | # fetch the full face table first |
|
|
78 | unless ($tilemap) { |
|
|
79 | CFPlus::DB::Server::req (table => facemap => sub { $tilemap = $_[0] }); |
|
|
80 | sync; |
|
|
81 | } |
|
|
82 | |
|
|
83 | $tilemap->{$hash} ||= do { |
|
|
84 | my $id; |
|
|
85 | CFPlus::DB::Server::req (get_tile_id => $hash, sub { $id = $_[0] }); |
|
|
86 | sync; |
|
|
87 | $id |
|
|
88 | } |
|
|
89 | } |
|
|
90 | |
|
|
91 | package CFPlus::DB::Server; |
229 | package DC::DB::Server; |
92 | |
230 | |
93 | use strict; |
231 | use strict; |
94 | |
232 | |
|
|
233 | use EV (); |
95 | use Fcntl; |
234 | use Fcntl; |
96 | use BerkeleyDB; |
|
|
97 | |
|
|
98 | our $DB_ENV; |
|
|
99 | our $DB_STATE; |
|
|
100 | our %DB_TABLE; |
|
|
101 | |
|
|
102 | sub open_db { |
|
|
103 | mkdir $DB_HOME, 0777; |
|
|
104 | my $recover = $BerkeleyDB::db_version >= 4.4 |
|
|
105 | ? eval "DB_REGISTER | DB_RECOVER" |
|
|
106 | : 0; |
|
|
107 | |
|
|
108 | $DB_ENV = new BerkeleyDB::Env |
|
|
109 | -Home => $DB_HOME, |
|
|
110 | -Cachesize => 8_000_000, |
|
|
111 | -ErrFile => "$DB_HOME/errorlog.txt", |
|
|
112 | # -ErrPrefix => "DATABASE", |
|
|
113 | -Verbose => 1, |
|
|
114 | -Flags => DB_CREATE | DB_RECOVER | DB_INIT_MPOOL | DB_INIT_LOCK | DB_INIT_TXN | $recover, |
|
|
115 | -SetFlags => DB_AUTO_COMMIT | DB_LOG_AUTOREMOVE, |
|
|
116 | or die "unable to create/open database home $DB_HOME: $BerkeleyDB::Error"; |
|
|
117 | |
|
|
118 | 1 |
|
|
119 | } |
|
|
120 | |
|
|
121 | sub table($) { |
|
|
122 | $DB_TABLE{$_[0]} ||= do { |
|
|
123 | my ($table) = @_; |
|
|
124 | |
|
|
125 | $table =~ s/([^a-zA-Z0-9_\-])/sprintf "=%x=", ord $1/ge; |
|
|
126 | |
|
|
127 | new BerkeleyDB::Btree |
|
|
128 | -Env => $DB_ENV, |
|
|
129 | -Filename => $table, |
|
|
130 | # -Filename => "database", |
|
|
131 | # -Subname => $table, |
|
|
132 | -Property => DB_CHKSUM, |
|
|
133 | -Flags => DB_CREATE | DB_UPGRADE, |
|
|
134 | or die "unable to create/open database table $_[0]: $BerkeleyDB::Error" |
|
|
135 | } |
|
|
136 | } |
|
|
137 | |
235 | |
138 | our %CB; |
236 | our %CB; |
139 | our $FH; |
237 | our $FH; |
140 | our $ID = "aaa0"; |
238 | our $ID = "aaa0"; |
141 | our ($fh_r_watcher, $fh_w_watcher); |
239 | our ($fh_r_watcher, $fh_w_watcher); |
142 | our $sync_timer; |
240 | our $sync_timer; |
143 | our $write_buf; |
241 | our $write_buf; |
144 | our $read_buf; |
242 | our $read_buf; |
145 | |
243 | |
146 | our $SYNC = Event->idle (min => 10, max => 60, parked => 1, cb => sub { |
|
|
147 | CFPlus::DB::Server::req (sync => sub { }); |
|
|
148 | $_[0]->w->stop; |
|
|
149 | }); |
|
|
150 | |
|
|
151 | sub fh_write { |
244 | sub fh_write { |
152 | my $len = syswrite $FH, $write_buf; |
245 | my $len = syswrite $FH, $write_buf; |
153 | |
246 | |
154 | substr $write_buf, 0, $len, ""; |
247 | substr $write_buf, 0, $len, ""; |
155 | |
248 | |
… | |
… | |
198 | my $id = ++$ID; |
291 | my $id = ++$ID; |
199 | $write_buf .= pack "N/a*", Storable::freeze [$id, $type, @args]; |
292 | $write_buf .= pack "N/a*", Storable::freeze [$id, $type, @args]; |
200 | $CB{$id} = $cb; |
293 | $CB{$id} = $cb; |
201 | |
294 | |
202 | $fh_w_watcher->start; |
295 | $fh_w_watcher->start; |
203 | $SYNC->start; |
|
|
204 | } |
|
|
205 | |
|
|
206 | sub do_sync { |
|
|
207 | $DB_ENV->txn_checkpoint (0, 0, 0); |
|
|
208 | () |
|
|
209 | } |
|
|
210 | |
|
|
211 | sub do_exists { |
|
|
212 | my ($db, $key) = @_; |
|
|
213 | |
|
|
214 | utf8::downgrade $key; |
|
|
215 | my $data; |
|
|
216 | (table $db)->db_get ($key, $data) == 0 |
|
|
217 | ? length $data |
|
|
218 | : () |
|
|
219 | } |
|
|
220 | |
|
|
221 | sub do_get { |
|
|
222 | my ($db, $key) = @_; |
|
|
223 | |
|
|
224 | utf8::downgrade $key; |
|
|
225 | my $data; |
|
|
226 | (table $db)->db_get ($key, $data) == 0 |
|
|
227 | ? $data |
|
|
228 | : () |
|
|
229 | } |
|
|
230 | |
|
|
231 | sub do_put { |
|
|
232 | my ($db, $key, $data) = @_; |
|
|
233 | |
|
|
234 | utf8::downgrade $key; |
|
|
235 | utf8::downgrade $data; |
|
|
236 | (table $db)->db_put ($key => $data) |
|
|
237 | } |
|
|
238 | |
|
|
239 | sub do_table { |
|
|
240 | my ($db) = @_; |
|
|
241 | |
|
|
242 | $db = table $db; |
|
|
243 | |
|
|
244 | my $cursor = $db->db_cursor; |
|
|
245 | my %kv; |
|
|
246 | my ($k, $v); |
|
|
247 | $kv{$k} = $v while $cursor->c_get ($k, $v, BerkeleyDB::DB_NEXT) == 0; |
|
|
248 | |
|
|
249 | \%kv |
|
|
250 | } |
|
|
251 | |
|
|
252 | sub do_get_tile_id { |
|
|
253 | my ($hash) = @_; |
|
|
254 | |
|
|
255 | my $id; |
|
|
256 | my $table = table "facemap"; |
|
|
257 | |
|
|
258 | return $id |
|
|
259 | if $table->db_get ($hash, $id) == 0; |
|
|
260 | |
|
|
261 | for (1..100) { |
|
|
262 | my $txn = $DB_ENV->txn_begin; |
|
|
263 | my $status = $table->db_get (id => $id); |
|
|
264 | if ($status == 0 || $status == BerkeleyDB::DB_NOTFOUND) { |
|
|
265 | $id = ($id || 64) + 1; |
|
|
266 | if ($table->db_put (id => $id) == 0 |
|
|
267 | && $table->db_put ($hash => $id) == 0) { |
|
|
268 | $txn->txn_commit; |
|
|
269 | |
|
|
270 | return $id; |
|
|
271 | } |
|
|
272 | } |
|
|
273 | $txn->txn_abort; |
|
|
274 | } |
|
|
275 | |
|
|
276 | die "maximum number of transaction retries reached - database problems?"; |
|
|
277 | } |
296 | } |
278 | |
297 | |
279 | sub do_unlink { |
298 | sub do_unlink { |
280 | unlink $_[0]; |
299 | unlink $_[0]; |
281 | } |
300 | } |
… | |
… | |
336 | |
355 | |
337 | print { $LOG_FH{$path} } "$ts $line\n" |
356 | print { $LOG_FH{$path} } "$ts $line\n" |
338 | } |
357 | } |
339 | |
358 | |
340 | sub run { |
359 | sub run { |
341 | ($FH, my $fh) = CFPlus::socketpipe; |
360 | ($FH, my $fh) = DC::socketpipe; |
342 | |
361 | |
343 | my $oldfh = select $FH; $| = 1; select $oldfh; |
362 | my $oldfh = select $FH; $| = 1; select $oldfh; |
344 | my $oldfh = select $fh; $| = 1; select $oldfh; |
363 | my $oldfh = select $fh; $| = 1; select $oldfh; |
345 | |
364 | |
346 | my $pid = fork; |
365 | my $pid = fork; |
… | |
… | |
350 | local $SIG{__DIE__}; |
369 | local $SIG{__DIE__}; |
351 | local $SIG{__WARN__}; |
370 | local $SIG{__WARN__}; |
352 | eval { |
371 | eval { |
353 | close $FH; |
372 | close $FH; |
354 | |
373 | |
355 | unless (eval { open_db }) { |
|
|
356 | eval { File::Path::rmtree $DB_HOME }; |
|
|
357 | open_db; |
|
|
358 | } |
|
|
359 | |
|
|
360 | while () { |
374 | while () { |
361 | 4 == read $fh, my $len, 4 |
375 | 4 == read $fh, my $len, 4 |
362 | or last; |
376 | or last; |
363 | $len = unpack "N", $len; |
377 | $len = unpack "N", $len; |
364 | $len == read $fh, my $req, $len |
378 | $len == read $fh, my $req, $len |
365 | or die "unexpected eof while reading request"; |
379 | or die "unexpected eof while reading request"; |
366 | |
380 | |
367 | $req = Storable::thaw $req; |
381 | $req = Storable::thaw $req; |
368 | |
382 | |
369 | my ($id, $type, @args) = @$req; |
383 | my ($id, $type, @args) = @$req; |
370 | my $cb = CFPlus::DB::Server->can ("do_$type") |
384 | my $cb = DC::DB::Server->can ("do_$type") |
371 | or die "$type: unknown database request type\n"; |
385 | or die "$type: unknown database request type\n"; |
372 | my $res = pack "N/a*", Storable::freeze [$id, $cb->(@args)]; |
386 | my $res = pack "N/a*", Storable::freeze [$id, $cb->(@args)]; |
373 | (syswrite $fh, $res) == length $res |
387 | (syswrite $fh, $res) == length $res |
374 | or die; |
388 | or die "DB::write: $!"; |
375 | } |
389 | } |
376 | }; |
390 | }; |
377 | |
391 | |
378 | my $error = $@; |
392 | my $error = $@; |
379 | |
393 | |
380 | eval { |
394 | eval { |
381 | undef %DB_TABLE; |
|
|
382 | undef $DB_ENV; |
|
|
383 | |
|
|
384 | Storable::store_fd [die => $error], $fh; |
395 | Storable::store_fd [die => $error], $fh; |
385 | }; |
396 | }; |
386 | |
397 | |
|
|
398 | warn $error |
|
|
399 | if $error; |
|
|
400 | |
387 | CFPlus::_exit 0; |
401 | DC::_exit 0; |
388 | } |
402 | } |
389 | |
403 | |
390 | close $fh; |
404 | close $fh; |
391 | CFPlus::fh_nonblocking $FH, 1; |
405 | DC::fh_nonblocking $FH, 1; |
392 | |
406 | |
393 | $CB{die} = sub { die shift }; |
407 | $CB{die} = sub { die shift }; |
394 | |
408 | |
395 | $fh_r_watcher = Event->io (fd => $FH, poll => 'r', nice => 1, cb => \&fh_read); |
409 | $fh_r_watcher = EV::io $FH, EV::READ , \&fh_read; |
396 | $fh_w_watcher = Event->io (fd => $FH, poll => 'w', nice => -1, parked => 1, cb => \&fh_write); |
410 | $fh_w_watcher = EV::io $FH, EV::WRITE, \&fh_write; |
397 | $SYNC->start; |
|
|
398 | } |
411 | } |
399 | |
412 | |
400 | sub stop { |
413 | sub stop { |
401 | close $FH; |
414 | close $FH; |
402 | } |
415 | } |