Commit | Line | Data |
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460b9539 | 1 | /* |
2 | * This file is part of DisOrder | |
eb525fcd | 3 | * Copyright (C) 2005, 2006, 2007 Richard Kettlewell |
460b9539 | 4 | * |
5 | * This program is free software; you can redistribute it and/or modify | |
6 | * it under the terms of the GNU General Public License as published by | |
7 | * the Free Software Foundation; either version 2 of the License, or | |
8 | * (at your option) any later version. | |
9 | * | |
10 | * This program is distributed in the hope that it will be useful, but | |
11 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
13 | * General Public License for more details. | |
14 | * | |
15 | * You should have received a copy of the GNU General Public License | |
16 | * along with this program; if not, write to the Free Software | |
17 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 | |
18 | * USA | |
19 | */ | |
20 | ||
21 | #include <config.h> | |
22 | #include "types.h" | |
23 | ||
24 | #include <string.h> | |
25 | #include <stdio.h> | |
26 | #include <db.h> | |
27 | #include <sys/socket.h> | |
28 | #include <pcre.h> | |
29 | #include <assert.h> | |
30 | #include <unistd.h> | |
31 | #include <errno.h> | |
32 | #include <stddef.h> | |
33 | #include <sys/time.h> | |
34 | #include <sys/resource.h> | |
35 | #include <time.h> | |
2a10b70b | 36 | #include <arpa/inet.h> |
460b9539 | 37 | |
38 | #include "event.h" | |
39 | #include "mem.h" | |
40 | #include "kvp.h" | |
41 | #include "log.h" | |
42 | #include "vector.h" | |
43 | #include "trackdb.h" | |
44 | #include "configuration.h" | |
45 | #include "syscalls.h" | |
46 | #include "wstat.h" | |
47 | #include "words.h" | |
48 | #include "printf.h" | |
49 | #include "filepart.h" | |
50 | #include "trackname.h" | |
51 | #include "trackdb-int.h" | |
52 | #include "logfd.h" | |
53 | #include "cache.h" | |
54 | #include "eventlog.h" | |
55 | #include "hash.h" | |
56 | ||
57 | #define RESCAN "disorder-rescan" | |
58 | #define DEADLOCK "disorder-deadlock" | |
59 | ||
60 | static const char *getpart(const char *track, | |
61 | const char *context, | |
62 | const char *part, | |
63 | const struct kvp *p, | |
64 | int *used_db); | |
65 | static int trackdb_alltags_tid(DB_TXN *tid, char ***taglistp); | |
66 | static int trackdb_get_global_tid(const char *name, | |
67 | DB_TXN *tid, | |
68 | const char **rp); | |
2a10b70b RK |
69 | static char **trackdb_new_tid(int *ntracksp, |
70 | int maxtracks, | |
71 | DB_TXN *tid); | |
1e64e9fb | 72 | static int trackdb_expire_noticed_tid(time_t earliest, DB_TXN *tid); |
460b9539 | 73 | |
74 | const struct cache_type cache_files_type = { 86400 }; | |
75 | unsigned long cache_files_hits, cache_files_misses; | |
76 | ||
77 | /* setup and teardown ********************************************************/ | |
78 | ||
79 | static const char *home; /* home had better not change */ | |
80 | DB_ENV *trackdb_env; /* db environment */ | |
81 | DB *trackdb_tracksdb; /* the db itself */ | |
82 | DB *trackdb_prefsdb; /* preferences */ | |
83 | DB *trackdb_searchdb; /* the search database */ | |
84 | DB *trackdb_tagsdb; /* the tags database */ | |
85 | DB *trackdb_globaldb; /* global preferences */ | |
2a10b70b | 86 | DB *trackdb_noticeddb; /* when track noticed */ |
460b9539 | 87 | static pid_t db_deadlock_pid = -1; /* deadlock manager PID */ |
88 | static pid_t rescan_pid = -1; /* rescanner PID */ | |
89 | static int initialized, opened; /* state */ | |
90 | ||
91 | /* tracks matched by required_tags */ | |
92 | static char **reqtracks; | |
93 | static size_t nreqtracks; | |
94 | ||
95 | /* comparison function for keys */ | |
96 | static int compare(DB attribute((unused)) *db_, | |
97 | const DBT *a, const DBT *b) { | |
98 | return compare_path_raw(a->data, a->size, b->data, b->size); | |
99 | } | |
100 | ||
101 | /* open environment */ | |
102 | void trackdb_init(int recover) { | |
103 | int err; | |
104 | static int recover_type[] = { 0, DB_RECOVER, DB_RECOVER_FATAL }; | |
105 | ||
106 | /* sanity checks */ | |
107 | assert(initialized == 0); | |
108 | ++initialized; | |
109 | if(home) { | |
110 | if(strcmp(home, config->home)) | |
111 | fatal(0, "cannot change db home without server restart"); | |
112 | home = config->home; | |
113 | } | |
114 | ||
115 | /* create environment */ | |
116 | if((err = db_env_create(&trackdb_env, 0))) fatal(0, "db_env_create: %s", | |
117 | db_strerror(err)); | |
118 | if((err = trackdb_env->set_alloc(trackdb_env, | |
119 | xmalloc_noptr, xrealloc_noptr, xfree))) | |
120 | fatal(0, "trackdb_env->set_alloc: %s", db_strerror(err)); | |
121 | if((err = trackdb_env->set_lk_max_locks(trackdb_env, 10000))) | |
122 | fatal(0, "trackdb_env->set_lk_max_locks: %s", db_strerror(err)); | |
123 | if((err = trackdb_env->set_lk_max_objects(trackdb_env, 10000))) | |
124 | fatal(0, "trackdb_env->set_lk_max_objects: %s", db_strerror(err)); | |
125 | if((err = trackdb_env->open(trackdb_env, config->home, | |
126 | DB_INIT_LOG | |
127 | |DB_INIT_LOCK | |
128 | |DB_INIT_MPOOL | |
129 | |DB_INIT_TXN | |
130 | |DB_CREATE | |
131 | |recover_type[recover], | |
132 | 0666))) | |
dc450d30 | 133 | fatal(0, "trackdb_env->open %s: %s", config->home, db_strerror(err)); |
460b9539 | 134 | trackdb_env->set_errpfx(trackdb_env, "DB"); |
135 | trackdb_env->set_errfile(trackdb_env, stderr); | |
136 | trackdb_env->set_verbose(trackdb_env, DB_VERB_DEADLOCK, 1); | |
137 | trackdb_env->set_verbose(trackdb_env, DB_VERB_RECOVERY, 1); | |
138 | trackdb_env->set_verbose(trackdb_env, DB_VERB_REPLICATION, 1); | |
139 | D(("initialized database environment")); | |
140 | } | |
141 | ||
142 | /* called when deadlock manager terminates */ | |
143 | static int reap_db_deadlock(ev_source attribute((unused)) *ev, | |
144 | pid_t attribute((unused)) pid, | |
145 | int status, | |
146 | const struct rusage attribute((unused)) *rusage, | |
147 | void attribute((unused)) *u) { | |
148 | db_deadlock_pid = -1; | |
149 | if(initialized) | |
150 | fatal(0, "deadlock manager unexpectedly terminated: %s", | |
151 | wstat(status)); | |
152 | else | |
153 | D(("deadlock manager terminated: %s", wstat(status))); | |
154 | return 0; | |
155 | } | |
156 | ||
d6dde5a3 RK |
157 | static pid_t subprogram(ev_source *ev, const char *prog, |
158 | int outputfd) { | |
460b9539 | 159 | pid_t pid; |
460b9539 | 160 | |
161 | /* If we're in the background then trap subprocess stdout/stderr */ | |
460b9539 | 162 | if(!(pid = xfork())) { |
163 | exitfn = _exit; | |
164 | ev_signal_atfork(ev); | |
165 | signal(SIGPIPE, SIG_DFL); | |
d6dde5a3 RK |
166 | if(outputfd != -1) { |
167 | xdup2(outputfd, 1); | |
168 | xclose(outputfd); | |
460b9539 | 169 | } |
170 | /* If we were negatively niced, undo it. We don't bother checking for | |
171 | * error, it's not that important. */ | |
172 | setpriority(PRIO_PROCESS, 0, 0); | |
173 | execlp(prog, prog, "--config", configfile, | |
174 | debugging ? "--debug" : "--no-debug", | |
0ca6d097 | 175 | log_default == &log_syslog ? "--syslog" : "--no-syslog", |
460b9539 | 176 | (char *)0); |
177 | fatal(errno, "error invoking %s", prog); | |
178 | } | |
460b9539 | 179 | return pid; |
180 | } | |
181 | ||
182 | /* start deadlock manager */ | |
183 | void trackdb_master(ev_source *ev) { | |
184 | assert(db_deadlock_pid == -1); | |
d6dde5a3 | 185 | db_deadlock_pid = subprogram(ev, DEADLOCK, -1); |
460b9539 | 186 | ev_child(ev, db_deadlock_pid, 0, reap_db_deadlock, 0); |
187 | D(("started deadlock manager")); | |
188 | } | |
189 | ||
190 | /* close environment */ | |
191 | void trackdb_deinit(void) { | |
192 | int err; | |
193 | ||
194 | /* sanity checks */ | |
195 | assert(initialized == 1); | |
196 | --initialized; | |
197 | ||
198 | /* close the environment */ | |
199 | if((err = trackdb_env->close(trackdb_env, 0))) | |
200 | fatal(0, "trackdb_env->close: %s", db_strerror(err)); | |
201 | ||
202 | if(rescan_pid != -1 && kill(rescan_pid, SIGTERM) < 0) | |
203 | fatal(errno, "error killing rescanner"); | |
204 | ||
205 | /* terminate the deadlock manager */ | |
206 | if(db_deadlock_pid != -1 && kill(db_deadlock_pid, SIGTERM) < 0) | |
207 | fatal(errno, "error killing deadlock manager"); | |
208 | db_deadlock_pid = -1; | |
209 | ||
210 | D(("deinitialized database environment")); | |
211 | } | |
212 | ||
213 | /* open a specific database */ | |
214 | static DB *open_db(const char *path, | |
215 | u_int32_t dbflags, | |
216 | DBTYPE dbtype, | |
217 | u_int32_t openflags, | |
218 | int mode) { | |
219 | int err; | |
220 | DB *db; | |
221 | ||
222 | D(("open %s", path)); | |
223 | path = config_get_file(path); | |
224 | if((err = db_create(&db, trackdb_env, 0))) | |
225 | fatal(0, "db_create %s: %s", path, db_strerror(err)); | |
226 | if(dbflags) | |
227 | if((err = db->set_flags(db, dbflags))) | |
228 | fatal(0, "db->set_flags %s: %s", path, db_strerror(err)); | |
229 | if(dbtype == DB_BTREE) | |
230 | if((err = db->set_bt_compare(db, compare))) | |
231 | fatal(0, "db->set_bt_compare %s: %s", path, db_strerror(err)); | |
232 | if((err = db->open(db, 0, path, 0, dbtype, | |
233 | openflags | DB_AUTO_COMMIT, mode))) | |
234 | fatal(0, "db->open %s: %s", path, db_strerror(err)); | |
235 | return db; | |
236 | } | |
237 | ||
238 | /* open track databases */ | |
239 | void trackdb_open(void) { | |
240 | /* sanity checks */ | |
241 | assert(opened == 0); | |
242 | ++opened; | |
243 | /* open the databases */ | |
244 | trackdb_tracksdb = open_db("tracks.db", | |
245 | DB_RECNUM, DB_BTREE, DB_CREATE, 0666); | |
246 | trackdb_searchdb = open_db("search.db", | |
247 | DB_DUP|DB_DUPSORT, DB_HASH, DB_CREATE, 0666); | |
248 | trackdb_tagsdb = open_db("tags.db", | |
249 | DB_DUP|DB_DUPSORT, DB_HASH, DB_CREATE, 0666); | |
250 | trackdb_prefsdb = open_db("prefs.db", 0, DB_HASH, DB_CREATE, 0666); | |
251 | trackdb_globaldb = open_db("global.db", 0, DB_HASH, DB_CREATE, 0666); | |
2a10b70b RK |
252 | trackdb_noticeddb = open_db("noticed.db", |
253 | DB_DUPSORT, DB_BTREE, DB_CREATE, 0666); | |
460b9539 | 254 | D(("opened databases")); |
255 | } | |
256 | ||
257 | /* close track databases */ | |
258 | void trackdb_close(void) { | |
259 | int err; | |
260 | ||
261 | /* sanity checks */ | |
262 | assert(opened == 1); | |
263 | --opened; | |
264 | if((err = trackdb_tracksdb->close(trackdb_tracksdb, 0))) | |
265 | fatal(0, "error closing tracks.db: %s", db_strerror(err)); | |
266 | if((err = trackdb_searchdb->close(trackdb_searchdb, 0))) | |
267 | fatal(0, "error closing search.db: %s", db_strerror(err)); | |
268 | if((err = trackdb_tagsdb->close(trackdb_tagsdb, 0))) | |
269 | fatal(0, "error closing tags.db: %s", db_strerror(err)); | |
270 | if((err = trackdb_prefsdb->close(trackdb_prefsdb, 0))) | |
271 | fatal(0, "error closing prefs.db: %s", db_strerror(err)); | |
272 | if((err = trackdb_globaldb->close(trackdb_globaldb, 0))) | |
273 | fatal(0, "error closing global.db: %s", db_strerror(err)); | |
2a10b70b RK |
274 | if((err = trackdb_noticeddb->close(trackdb_noticeddb, 0))) |
275 | fatal(0, "error closing noticed.db: %s", db_strerror(err)); | |
460b9539 | 276 | trackdb_tracksdb = trackdb_searchdb = trackdb_prefsdb = 0; |
277 | trackdb_tagsdb = trackdb_globaldb = 0; | |
278 | D(("closed databases")); | |
279 | } | |
280 | ||
281 | /* generic db routines *******************************************************/ | |
282 | ||
283 | /* fetch and decode a database entry. Returns 0, DB_NOTFOUND or | |
284 | * DB_LOCK_DEADLOCK. */ | |
285 | int trackdb_getdata(DB *db, | |
286 | const char *track, | |
287 | struct kvp **kp, | |
288 | DB_TXN *tid) { | |
289 | int err; | |
290 | DBT key, data; | |
291 | ||
292 | switch(err = db->get(db, tid, make_key(&key, track), | |
293 | prepare_data(&data), 0)) { | |
294 | case 0: | |
295 | *kp = kvp_urldecode(data.data, data.size); | |
296 | return 0; | |
297 | case DB_NOTFOUND: | |
298 | *kp = 0; | |
299 | return err; | |
300 | case DB_LOCK_DEADLOCK: | |
301 | error(0, "error querying database: %s", db_strerror(err)); | |
302 | return err; | |
303 | default: | |
304 | fatal(0, "error querying database: %s", db_strerror(err)); | |
305 | } | |
306 | } | |
307 | ||
308 | /* encode and store a database entry. Returns 0, DB_KEYEXIST or | |
309 | * DB_LOCK_DEADLOCK. */ | |
310 | int trackdb_putdata(DB *db, | |
311 | const char *track, | |
312 | const struct kvp *k, | |
313 | DB_TXN *tid, | |
314 | u_int32_t flags) { | |
315 | int err; | |
316 | DBT key, data; | |
317 | ||
318 | switch(err = db->put(db, tid, make_key(&key, track), | |
319 | encode_data(&data, k), flags)) { | |
320 | case 0: | |
321 | case DB_KEYEXIST: | |
322 | return err; | |
323 | case DB_LOCK_DEADLOCK: | |
324 | error(0, "error updating database: %s", db_strerror(err)); | |
325 | return err; | |
326 | default: | |
327 | fatal(0, "error updating database: %s", db_strerror(err)); | |
328 | } | |
329 | } | |
330 | ||
331 | /* delete a database entry */ | |
332 | int trackdb_delkey(DB *db, | |
333 | const char *track, | |
334 | DB_TXN *tid) { | |
335 | int err; | |
336 | ||
337 | DBT key; | |
338 | switch(err = db->del(db, tid, make_key(&key, track), 0)) { | |
339 | case 0: | |
340 | case DB_NOTFOUND: | |
341 | return 0; | |
342 | case DB_LOCK_DEADLOCK: | |
343 | error(0, "error updating database: %s", db_strerror(err)); | |
344 | return err; | |
345 | default: | |
346 | fatal(0, "error updating database: %s", db_strerror(err)); | |
347 | } | |
348 | } | |
349 | ||
350 | /* open a database cursor */ | |
351 | DBC *trackdb_opencursor(DB *db, DB_TXN *tid) { | |
352 | int err; | |
353 | DBC *c; | |
354 | ||
355 | switch(err = db->cursor(db, tid, &c, 0)) { | |
356 | case 0: break; | |
357 | default: fatal(0, "error creating cursor: %s", db_strerror(err)); | |
358 | } | |
359 | return c; | |
360 | } | |
361 | ||
362 | /* close a database cursor; returns 0 or DB_LOCK_DEADLOCK */ | |
363 | int trackdb_closecursor(DBC *c) { | |
364 | int err; | |
365 | ||
366 | if(!c) return 0; | |
367 | switch(err = c->c_close(c)) { | |
368 | case 0: | |
369 | return err; | |
370 | case DB_LOCK_DEADLOCK: | |
371 | error(0, "error closing cursor: %s", db_strerror(err)); | |
372 | return err; | |
373 | default: | |
374 | fatal(0, "error closing cursor: %s", db_strerror(err)); | |
375 | } | |
376 | } | |
377 | ||
378 | /* delete a (key,data) pair. Returns 0, DB_NOTFOUND or DB_LOCK_DEADLOCK. */ | |
379 | int trackdb_delkeydata(DB *db, | |
380 | const char *word, | |
381 | const char *track, | |
382 | DB_TXN *tid) { | |
383 | int err; | |
384 | DBC *c; | |
385 | DBT key, data; | |
386 | ||
387 | c = trackdb_opencursor(db, tid); | |
388 | switch(err = c->c_get(c, make_key(&key, word), | |
389 | make_key(&data, track), DB_GET_BOTH)) { | |
390 | case 0: | |
391 | switch(err = c->c_del(c, 0)) { | |
392 | case 0: | |
393 | break; | |
394 | case DB_KEYEMPTY: | |
395 | err = 0; | |
396 | break; | |
397 | case DB_LOCK_DEADLOCK: | |
398 | error(0, "error updating database: %s", db_strerror(err)); | |
399 | break; | |
400 | default: | |
401 | fatal(0, "c->c_del: %s", db_strerror(err)); | |
402 | } | |
403 | break; | |
404 | case DB_NOTFOUND: | |
405 | break; | |
406 | case DB_LOCK_DEADLOCK: | |
407 | error(0, "error updating database: %s", db_strerror(err)); | |
408 | break; | |
409 | default: | |
410 | fatal(0, "c->c_get: %s", db_strerror(err)); | |
411 | } | |
412 | if(trackdb_closecursor(c)) err = DB_LOCK_DEADLOCK; | |
413 | return err; | |
414 | } | |
415 | ||
416 | /* start a transaction */ | |
417 | DB_TXN *trackdb_begin_transaction(void) { | |
418 | DB_TXN *tid; | |
419 | int err; | |
420 | ||
421 | if((err = trackdb_env->txn_begin(trackdb_env, 0, &tid, 0))) | |
422 | fatal(0, "trackdb_env->txn_begin: %s", db_strerror(err)); | |
423 | return tid; | |
424 | } | |
425 | ||
426 | /* abort transaction */ | |
427 | void trackdb_abort_transaction(DB_TXN *tid) { | |
428 | int err; | |
429 | ||
430 | if(tid) | |
431 | if((err = tid->abort(tid))) | |
432 | fatal(0, "tid->abort: %s", db_strerror(err)); | |
433 | } | |
434 | ||
435 | /* commit transaction */ | |
436 | void trackdb_commit_transaction(DB_TXN *tid) { | |
437 | int err; | |
438 | ||
439 | if((err = tid->commit(tid, 0))) | |
440 | fatal(0, "tid->commit: %s", db_strerror(err)); | |
441 | } | |
442 | ||
443 | /* search/tags shared code ***************************************************/ | |
444 | ||
445 | /* comparison function used by dedupe() */ | |
446 | static int wordcmp(const void *a, const void *b) { | |
447 | return strcmp(*(const char **)a, *(const char **)b); | |
448 | } | |
449 | ||
450 | /* sort and de-dupe VEC */ | |
451 | static char **dedupe(char **vec, int nvec) { | |
452 | int m, n; | |
453 | ||
454 | qsort(vec, nvec, sizeof (char *), wordcmp); | |
455 | m = n = 0; | |
456 | if(nvec) { | |
457 | vec[m++] = vec[0]; | |
458 | for(n = 1; n < nvec; ++n) | |
459 | if(strcmp(vec[n], vec[m - 1])) | |
460 | vec[m++] = vec[n]; | |
461 | } | |
462 | vec[m] = 0; | |
463 | return vec; | |
464 | } | |
465 | ||
466 | /* update a key/track database. Returns 0 or DB_DEADLOCK. */ | |
467 | static int register_word(DB *db, const char *what, | |
468 | const char *track, const char *word, | |
469 | DB_TXN *tid) { | |
470 | int err; | |
471 | DBT key, data; | |
472 | ||
473 | switch(err = db->put(db, tid, make_key(&key, word), | |
474 | make_key(&data, track), DB_NODUPDATA)) { | |
475 | case 0: | |
476 | case DB_KEYEXIST: | |
477 | return 0; | |
478 | case DB_LOCK_DEADLOCK: | |
479 | error(0, "error updating %s.db: %s", what, db_strerror(err)); | |
480 | return err; | |
481 | default: | |
482 | fatal(0, "error updating %s.db: %s", what, db_strerror(err)); | |
483 | } | |
484 | } | |
485 | ||
486 | /* search primitives *********************************************************/ | |
487 | ||
488 | /* return true iff NAME is a trackname_display_ pref */ | |
489 | static int is_display_pref(const char *name) { | |
490 | static const char prefix[] = "trackname_display_"; | |
491 | return !strncmp(name, prefix, (sizeof prefix) - 1); | |
492 | } | |
493 | ||
494 | /* compute the words of a track name */ | |
495 | static char **track_to_words(const char *track, | |
496 | const struct kvp *p) { | |
497 | struct vector v; | |
498 | char **w; | |
499 | int nw; | |
a8747834 | 500 | const char *rootless = track_rootless(track); |
460b9539 | 501 | |
a8747834 | 502 | if(!rootless) |
503 | rootless = track; /* bodge */ | |
460b9539 | 504 | vector_init(&v); |
a8747834 | 505 | if((w = words(casefold(strip_extension(rootless)), &nw))) |
460b9539 | 506 | vector_append_many(&v, w, nw); |
507 | ||
508 | for(; p; p = p->next) | |
509 | if(is_display_pref(p->name)) | |
510 | if((w = words(casefold(p->value), &nw))) | |
511 | vector_append_many(&v, w, nw); | |
512 | vector_terminate(&v); | |
513 | return dedupe(v.vec, v.nvec); | |
514 | } | |
515 | ||
516 | /* return nonzero iff WORD is a stopword */ | |
517 | static int stopword(const char *word) { | |
518 | int n; | |
519 | ||
520 | for(n = 0; n < config->stopword.n | |
521 | && strcmp(word, config->stopword.s[n]); ++n) | |
522 | ; | |
523 | return n < config->stopword.n; | |
524 | } | |
525 | ||
526 | /* record that WORD appears in TRACK. Returns 0 or DB_LOCK_DEADLOCK. */ | |
527 | static int register_search_word(const char *track, const char *word, | |
528 | DB_TXN *tid) { | |
529 | if(stopword(word)) return 0; | |
530 | return register_word(trackdb_searchdb, "search", track, word, tid); | |
531 | } | |
532 | ||
533 | /* Tags **********************************************************************/ | |
534 | ||
535 | /* Return nonzero if C is a valid tag character */ | |
536 | static int tagchar(int c) { | |
537 | switch(c) { | |
538 | case ',': | |
539 | return 0; | |
540 | default: | |
541 | return c >= ' '; | |
542 | } | |
543 | } | |
544 | ||
545 | /* Parse and de-dupe a tag list. If S=0 then assumes "". */ | |
546 | static char **parsetags(const char *s) { | |
547 | const char *t; | |
548 | struct vector v; | |
549 | ||
550 | vector_init(&v); | |
551 | if(s) { | |
552 | /* skip initial separators */ | |
553 | while(*s && (!tagchar(*s) || *s == ' ')) | |
554 | ++s; | |
555 | while(*s) { | |
556 | /* find the extent of the tag */ | |
557 | t = s; | |
558 | while(*s && tagchar(*s)) | |
559 | ++s; | |
560 | /* strip trailing spaces */ | |
561 | while(s > t && s[-1] == ' ') | |
562 | --s; | |
563 | vector_append(&v, xstrndup(t, s - t)); | |
564 | /* skip intermediate and trailing separators */ | |
565 | while(*s && (!tagchar(*s) || *s == ' ')) | |
566 | ++s; | |
567 | } | |
568 | } | |
569 | vector_terminate(&v); | |
570 | return dedupe(v.vec, v.nvec); | |
571 | } | |
572 | ||
573 | /* Record that TRACK has TAG. Returns 0 or DB_LOCK_DEADLOCK. */ | |
574 | static int register_tag(const char *track, const char *tag, DB_TXN *tid) { | |
575 | return register_word(trackdb_tagsdb, "tags", track, tag, tid); | |
576 | } | |
577 | ||
578 | /* aliases *******************************************************************/ | |
579 | ||
580 | /* compute the alias and store at aliasp. Returns 0 or DB_LOCK_DEADLOCK. If | |
581 | * there is no alias sets *aliasp to 0. */ | |
582 | static int compute_alias(char **aliasp, | |
583 | const char *track, | |
584 | const struct kvp *p, | |
585 | DB_TXN *tid) { | |
586 | struct dynstr d; | |
587 | const char *s = config->alias, *t, *expansion, *part; | |
588 | int c, used_db = 0, slash_prefix, err; | |
589 | struct kvp *at; | |
137e36ed | 590 | const char *const root = find_track_root(track); |
460b9539 | 591 | |
137e36ed | 592 | if(!root) { |
593 | /* Bodge for tracks with no root */ | |
594 | *aliasp = 0; | |
595 | return 0; | |
596 | } | |
460b9539 | 597 | dynstr_init(&d); |
137e36ed | 598 | dynstr_append_string(&d, root); |
460b9539 | 599 | while((c = (unsigned char)*s++)) { |
600 | if(c != '{') { | |
601 | dynstr_append(&d, c); | |
602 | continue; | |
603 | } | |
604 | if((slash_prefix = (*s == '/'))) | |
605 | s++; | |
606 | t = strchr(s, '}'); | |
607 | assert(t != 0); /* validated at startup */ | |
608 | part = xstrndup(s, t - s); | |
609 | expansion = getpart(track, "display", part, p, &used_db); | |
610 | if(*expansion) { | |
611 | if(slash_prefix) dynstr_append(&d, '/'); | |
612 | dynstr_append_string(&d, expansion); | |
613 | } | |
614 | s = t + 1; /* skip {part} */ | |
615 | } | |
616 | /* only admit to the alias if we used the db... */ | |
617 | if(!used_db) { | |
618 | *aliasp = 0; | |
619 | return 0; | |
620 | } | |
621 | dynstr_terminate(&d); | |
622 | /* ...and the answer differs from the original... */ | |
623 | if(!strcmp(track, d.vec)) { | |
624 | *aliasp = 0; | |
625 | return 0; | |
626 | } | |
627 | /* ...and there isn't already a different track with that name (including as | |
628 | * an alias) */ | |
629 | switch(err = trackdb_getdata(trackdb_tracksdb, d.vec, &at, tid)) { | |
630 | case 0: | |
460b9539 | 631 | if((s = kvp_get(at, "_alias_for")) |
632 | && !strcmp(s, track)) { | |
633 | case DB_NOTFOUND: | |
460b9539 | 634 | *aliasp = d.vec; |
635 | } else { | |
460b9539 | 636 | *aliasp = 0; |
637 | } | |
638 | return 0; | |
639 | default: | |
640 | return err; | |
641 | } | |
642 | } | |
643 | ||
644 | /* get track and prefs data (if tp/pp not null pointers). Returns 0 on | |
645 | * success, DB_NOTFOUND if the track does not exist or DB_LOCK_DEADLOCK. | |
646 | * Always sets the return values, even if only to null pointers. */ | |
647 | static int gettrackdata(const char *track, | |
648 | struct kvp **tp, | |
649 | struct kvp **pp, | |
650 | const char **actualp, | |
651 | unsigned flags, | |
652 | #define GTD_NOALIAS 0x0001 | |
653 | DB_TXN *tid) { | |
654 | int err; | |
655 | const char *actual = track; | |
656 | struct kvp *t = 0, *p = 0; | |
657 | ||
658 | if((err = trackdb_getdata(trackdb_tracksdb, track, &t, tid))) goto done; | |
659 | if((actual = kvp_get(t, "_alias_for"))) { | |
660 | if(flags & GTD_NOALIAS) { | |
661 | error(0, "alias passed to gettrackdata where real path required"); | |
662 | abort(); | |
663 | } | |
664 | if((err = trackdb_getdata(trackdb_tracksdb, actual, &t, tid))) goto done; | |
665 | } else | |
666 | actual = track; | |
667 | assert(actual != 0); | |
668 | if(pp) { | |
669 | if((err = trackdb_getdata(trackdb_prefsdb, actual, &p, tid)) == DB_LOCK_DEADLOCK) | |
670 | goto done; | |
671 | } | |
672 | err = 0; | |
673 | done: | |
674 | if(actualp) *actualp = actual; | |
675 | if(tp) *tp = t; | |
676 | if(pp) *pp = p; | |
677 | return err; | |
678 | } | |
679 | ||
680 | /* trackdb_notice() **********************************************************/ | |
681 | ||
6c81eef9 | 682 | /** @brief notice a possibly new track |
2a10b70b RK |
683 | * @return @c DB_NOTFOUND if new, 0 if already known |
684 | */ | |
460b9539 | 685 | int trackdb_notice(const char *track, |
686 | const char *path) { | |
687 | int err; | |
688 | DB_TXN *tid; | |
689 | ||
690 | for(;;) { | |
691 | tid = trackdb_begin_transaction(); | |
692 | err = trackdb_notice_tid(track, path, tid); | |
693 | if((err == DB_LOCK_DEADLOCK)) goto fail; | |
694 | break; | |
695 | fail: | |
696 | trackdb_abort_transaction(tid); | |
697 | } | |
698 | trackdb_commit_transaction(tid); | |
699 | return err; | |
700 | } | |
701 | ||
6c81eef9 | 702 | /** @brief notice a possibly new track |
2a10b70b RK |
703 | * @return @c DB_NOTFOUND if new, 0 if already known, @c DB_LOCK_DEADLOCK also |
704 | */ | |
460b9539 | 705 | int trackdb_notice_tid(const char *track, |
706 | const char *path, | |
707 | DB_TXN *tid) { | |
708 | int err, n; | |
709 | struct kvp *t, *a, *p; | |
710 | int t_changed, ret; | |
711 | char *alias, **w; | |
2a10b70b | 712 | |
460b9539 | 713 | /* notice whether the tracks.db entry changes */ |
714 | t_changed = 0; | |
715 | /* get any existing tracks entry */ | |
716 | if((err = gettrackdata(track, &t, &p, 0, 0, tid)) == DB_LOCK_DEADLOCK) | |
717 | return err; | |
2a10b70b | 718 | ret = err; /* 0 or DB_NOTFOUND */ |
460b9539 | 719 | /* this is a real track */ |
720 | t_changed += kvp_set(&t, "_alias_for", 0); | |
721 | t_changed += kvp_set(&t, "_path", path); | |
722 | /* if we have an alias record it in the database */ | |
723 | if((err = compute_alias(&alias, track, p, tid))) return err; | |
724 | if(alias) { | |
725 | /* won't overwrite someone else's alias as compute_alias() checks */ | |
726 | D(("%s: alias %s", track, alias)); | |
727 | a = 0; | |
728 | kvp_set(&a, "_alias_for", track); | |
729 | if((err = trackdb_putdata(trackdb_tracksdb, alias, a, tid, 0))) return err; | |
730 | } | |
731 | /* update search.db */ | |
732 | w = track_to_words(track, p); | |
733 | for(n = 0; w[n]; ++n) | |
734 | if((err = register_search_word(track, w[n], tid))) | |
735 | return err; | |
736 | /* update tags.db */ | |
737 | w = parsetags(kvp_get(p, "tags")); | |
738 | for(n = 0; w[n]; ++n) | |
739 | if((err = register_tag(track, w[n], tid))) | |
740 | return err; | |
741 | reqtracks = 0; | |
742 | /* only store the tracks.db entry if it has changed */ | |
743 | if(t_changed && (err = trackdb_putdata(trackdb_tracksdb, track, t, tid, 0))) | |
744 | return err; | |
2a10b70b RK |
745 | if(ret == DB_NOTFOUND) { |
746 | uint32_t timestamp[2]; | |
747 | time_t now; | |
748 | DBT key, data; | |
749 | ||
750 | time(&now); | |
751 | timestamp[0] = htonl((uint64_t)now >> 32); | |
752 | timestamp[1] = htonl((uint32_t)now); | |
753 | memset(&key, 0, sizeof key); | |
754 | key.data = timestamp; | |
755 | key.size = sizeof timestamp; | |
756 | switch(err = trackdb_noticeddb->put(trackdb_noticeddb, tid, &key, | |
757 | make_key(&data, track), 0)) { | |
758 | case 0: break; | |
759 | case DB_LOCK_DEADLOCK: return err; | |
760 | default: fatal(0, "error updating noticed.db: %s", db_strerror(err)); | |
761 | } | |
762 | } | |
460b9539 | 763 | return ret; |
764 | } | |
765 | ||
766 | /* trackdb_obsolete() ********************************************************/ | |
767 | ||
768 | /* obsolete a track */ | |
769 | int trackdb_obsolete(const char *track, DB_TXN *tid) { | |
770 | int err, n; | |
771 | struct kvp *p; | |
772 | char *alias, **w; | |
773 | ||
774 | if((err = gettrackdata(track, 0, &p, 0, | |
775 | GTD_NOALIAS, tid)) == DB_LOCK_DEADLOCK) | |
776 | return err; | |
777 | else if(err == DB_NOTFOUND) return 0; | |
778 | /* compute the alias, if any, and delete it */ | |
779 | if(compute_alias(&alias, track, p, tid)) return err; | |
780 | if(alias) { | |
781 | /* if the alias points to some other track then compute_alias won't | |
782 | * return it */ | |
783 | if(trackdb_delkey(trackdb_tracksdb, alias, tid)) | |
784 | return err; | |
785 | } | |
786 | /* update search.db */ | |
787 | w = track_to_words(track, p); | |
788 | for(n = 0; w[n]; ++n) | |
789 | if(trackdb_delkeydata(trackdb_searchdb, | |
790 | w[n], track, tid) == DB_LOCK_DEADLOCK) | |
791 | return err; | |
792 | /* update tags.db */ | |
793 | w = parsetags(kvp_get(p, "tags")); | |
794 | for(n = 0; w[n]; ++n) | |
795 | if(trackdb_delkeydata(trackdb_tagsdb, | |
796 | w[n], track, tid) == DB_LOCK_DEADLOCK) | |
797 | return err; | |
798 | reqtracks = 0; | |
799 | /* update tracks.db */ | |
800 | if(trackdb_delkey(trackdb_tracksdb, track, tid) == DB_LOCK_DEADLOCK) | |
801 | return err; | |
802 | /* We don't delete the prefs, so they survive temporary outages of the | |
803 | * (possibly virtual) track filesystem */ | |
804 | return 0; | |
805 | } | |
806 | ||
807 | /* trackdb_stats() ***********************************************************/ | |
808 | ||
809 | #define H(name) { #name, offsetof(DB_HASH_STAT, name) } | |
810 | #define B(name) { #name, offsetof(DB_BTREE_STAT, name) } | |
811 | ||
812 | static const struct statinfo { | |
813 | const char *name; | |
814 | size_t offset; | |
815 | } statinfo_hash[] = { | |
816 | H(hash_magic), | |
817 | H(hash_version), | |
818 | H(hash_nkeys), | |
819 | H(hash_ndata), | |
820 | H(hash_pagesize), | |
821 | H(hash_ffactor), | |
822 | H(hash_buckets), | |
823 | H(hash_free), | |
824 | H(hash_bfree), | |
825 | H(hash_bigpages), | |
826 | H(hash_big_bfree), | |
827 | H(hash_overflows), | |
828 | H(hash_ovfl_free), | |
829 | H(hash_dup), | |
830 | H(hash_dup_free), | |
831 | }, statinfo_btree[] = { | |
832 | B(bt_magic), | |
833 | B(bt_version), | |
834 | B(bt_nkeys), | |
835 | B(bt_ndata), | |
836 | B(bt_pagesize), | |
837 | B(bt_minkey), | |
838 | B(bt_re_len), | |
839 | B(bt_re_pad), | |
840 | B(bt_levels), | |
841 | B(bt_int_pg), | |
842 | B(bt_leaf_pg), | |
843 | B(bt_dup_pg), | |
844 | B(bt_over_pg), | |
845 | B(bt_free), | |
846 | B(bt_int_pgfree), | |
847 | B(bt_leaf_pgfree), | |
848 | B(bt_dup_pgfree), | |
849 | B(bt_over_pgfree), | |
850 | }; | |
851 | ||
852 | /* look up stats for DB */ | |
853 | static int get_stats(struct vector *v, | |
854 | DB *database, | |
855 | const struct statinfo *si, | |
856 | size_t nsi, | |
857 | DB_TXN *tid) { | |
858 | void *sp; | |
859 | size_t n; | |
860 | char *str; | |
861 | int err; | |
862 | ||
863 | if(database) { | |
864 | switch(err = database->stat(database, tid, &sp, 0)) { | |
865 | case 0: | |
866 | break; | |
867 | case DB_LOCK_DEADLOCK: | |
868 | error(0, "error querying database: %s", db_strerror(err)); | |
869 | return err; | |
870 | default: | |
871 | fatal(0, "error querying database: %s", db_strerror(err)); | |
872 | } | |
873 | for(n = 0; n < nsi; ++n) { | |
874 | byte_xasprintf(&str, "%s=%"PRIuMAX, si[n].name, | |
875 | (uintmax_t)*(u_int32_t *)((char *)sp + si[n].offset)); | |
876 | vector_append(v, str); | |
877 | } | |
878 | } | |
879 | return 0; | |
880 | } | |
881 | ||
882 | struct search_entry { | |
883 | char *word; | |
884 | int n; | |
885 | }; | |
886 | ||
887 | /* find the top COUNT words in the search database */ | |
888 | static int search_league(struct vector *v, int count, DB_TXN *tid) { | |
889 | struct search_entry *se; | |
890 | DBT k, d; | |
891 | DBC *cursor; | |
892 | int err, n = 0, nse = 0, i; | |
893 | char *word = 0; | |
894 | size_t wl = 0; | |
895 | char *str; | |
896 | ||
897 | cursor = trackdb_opencursor(trackdb_searchdb, tid); | |
898 | se = xmalloc(count * sizeof *se); | |
899 | while(!(err = cursor->c_get(cursor, prepare_data(&k), prepare_data(&d), | |
900 | DB_NEXT))) { | |
901 | if(word && wl == k.size && !strncmp(word, k.data, wl)) | |
902 | ++n; | |
903 | else { | |
904 | #define FINALIZE() do { \ | |
905 | if(word && (nse < count || n > se[nse - 1].n)) { \ | |
906 | if(nse == count) \ | |
907 | i = nse - 1; \ | |
908 | else \ | |
909 | i = nse++; \ | |
910 | while(i > 0 && n > se[i - 1].n) \ | |
911 | --i; \ | |
912 | memmove(&se[i + 1], &se[i], (nse - i) * sizeof *se); \ | |
913 | se[i].word = word; \ | |
914 | se[i].n = n; \ | |
915 | } \ | |
916 | } while(0) | |
917 | FINALIZE(); | |
918 | word = xstrndup(k.data, wl = k.size); | |
919 | n = 1; | |
920 | } | |
921 | } | |
922 | switch(err) { | |
923 | case DB_NOTFOUND: | |
924 | err = 0; | |
925 | break; | |
926 | case DB_LOCK_DEADLOCK: | |
927 | error(0, "error querying search database: %s", db_strerror(err)); | |
928 | break; | |
929 | default: | |
930 | fatal(0, "error querying search database: %s", db_strerror(err)); | |
931 | } | |
932 | if(trackdb_closecursor(cursor)) err = DB_LOCK_DEADLOCK; | |
933 | if(err) return err; | |
934 | FINALIZE(); | |
935 | byte_xasprintf(&str, "Top %d search words:", nse); | |
936 | vector_append(v, str); | |
937 | for(i = 0; i < nse; ++i) { | |
938 | byte_xasprintf(&str, "%4d: %5d %s", i + 1, se[i].n, se[i].word); | |
939 | vector_append(v, str); | |
940 | } | |
941 | return 0; | |
942 | } | |
943 | ||
944 | #define SI(what) statinfo_##what, \ | |
945 | sizeof statinfo_##what / sizeof (struct statinfo) | |
946 | ||
947 | /* return a list of database stats */ | |
948 | char **trackdb_stats(int *nstatsp) { | |
949 | DB_TXN *tid; | |
950 | struct vector v; | |
460b9539 | 951 | |
952 | vector_init(&v); | |
953 | for(;;) { | |
954 | tid = trackdb_begin_transaction(); | |
955 | v.nvec = 0; | |
956 | vector_append(&v, (char *)"Tracks database stats:"); | |
957 | if(get_stats(&v, trackdb_tracksdb, SI(btree), tid)) goto fail; | |
958 | vector_append(&v, (char *)""); | |
959 | vector_append(&v, (char *)"Search database stats:"); | |
960 | if(get_stats(&v, trackdb_searchdb, SI(hash), tid)) goto fail; | |
961 | vector_append(&v, (char *)""); | |
962 | vector_append(&v, (char *)"Prefs database stats:"); | |
963 | if(get_stats(&v, trackdb_prefsdb, SI(hash), tid)) goto fail; | |
964 | vector_append(&v, (char *)""); | |
965 | if(search_league(&v, 10, tid)) goto fail; | |
460b9539 | 966 | vector_terminate(&v); |
967 | break; | |
968 | fail: | |
969 | trackdb_abort_transaction(tid); | |
970 | } | |
971 | trackdb_commit_transaction(tid); | |
972 | if(nstatsp) *nstatsp = v.nvec; | |
973 | return v.vec; | |
974 | } | |
975 | ||
d6dde5a3 RK |
976 | struct stats_details { |
977 | void (*done)(char *data, void *u); | |
978 | void *u; | |
979 | int exited; /* subprocess exited */ | |
980 | int closed; /* pipe close */ | |
981 | int wstat; /* wait status from subprocess */ | |
982 | struct dynstr data[1]; /* data read from pipe */ | |
983 | }; | |
984 | ||
985 | static void stats_complete(struct stats_details *d) { | |
986 | char *s; | |
987 | ||
988 | if(!(d->exited && d->closed)) | |
989 | return; | |
990 | byte_xasprintf(&s, "\n" | |
991 | "Server stats:\n" | |
992 | "track lookup cache hits: %lu\n" | |
993 | "track lookup cache misses: %lu\n", | |
994 | cache_files_hits, | |
995 | cache_files_misses); | |
996 | dynstr_append_string(d->data, s); | |
997 | dynstr_terminate(d->data); | |
998 | d->done(d->data->vec, d->u); | |
999 | } | |
1000 | ||
1001 | static int stats_finished(ev_source attribute((unused)) *ev, | |
1002 | pid_t attribute((unused)) pid, | |
1003 | int status, | |
1004 | const struct rusage attribute((unused)) *rusage, | |
1005 | void *u) { | |
1006 | struct stats_details *const d = u; | |
1007 | ||
1008 | d->exited = 1; | |
1009 | if(status) | |
1010 | error(0, "disorder-stats %s", wstat(status)); | |
1011 | stats_complete(d); | |
1012 | return 0; | |
1013 | } | |
1014 | ||
1015 | static int stats_read(ev_source attribute((unused)) *ev, | |
1016 | ev_reader *reader, | |
d6dde5a3 RK |
1017 | void *ptr, |
1018 | size_t bytes, | |
1019 | int eof, | |
1020 | void *u) { | |
1021 | struct stats_details *const d = u; | |
1022 | ||
1023 | dynstr_append_bytes(d->data, ptr, bytes); | |
1024 | ev_reader_consume(reader, bytes); | |
1025 | if(eof) | |
1026 | d->closed = 1; | |
1027 | stats_complete(d); | |
1028 | return 0; | |
1029 | } | |
1030 | ||
1031 | static int stats_error(ev_source attribute((unused)) *ev, | |
d6dde5a3 RK |
1032 | int errno_value, |
1033 | void *u) { | |
1034 | struct stats_details *const d = u; | |
1035 | ||
1036 | error(errno_value, "error reading from pipe to disorder-stats"); | |
1037 | d->closed = 1; | |
1038 | stats_complete(d); | |
1039 | return 0; | |
1040 | } | |
1041 | ||
1042 | void trackdb_stats_subprocess(ev_source *ev, | |
1043 | void (*done)(char *data, void *u), | |
1044 | void *u) { | |
1045 | int p[2]; | |
1046 | pid_t pid; | |
1047 | struct stats_details *d = xmalloc(sizeof *d); | |
1048 | ||
1049 | dynstr_init(d->data); | |
1050 | d->done = done; | |
1051 | d->u = u; | |
1052 | xpipe(p); | |
1053 | pid = subprogram(ev, "disorder-stats", p[1]); | |
1054 | xclose(p[1]); | |
1055 | ev_child(ev, pid, 0, stats_finished, d); | |
1056 | ev_reader_new(ev, p[0], stats_read, stats_error, d, "disorder-stats reader"); | |
1057 | } | |
1058 | ||
460b9539 | 1059 | /* set a pref (remove if value=0) */ |
1060 | int trackdb_set(const char *track, | |
1061 | const char *name, | |
1062 | const char *value) { | |
1063 | struct kvp *t, *p, *a; | |
1064 | DB_TXN *tid; | |
1065 | int err, cmp; | |
1066 | char *oldalias, *newalias, **oldtags = 0, **newtags; | |
1067 | ||
f26f062a | 1068 | if(value) { |
1069 | /* TODO: if value matches default then set value=0 */ | |
1070 | } | |
1071 | ||
460b9539 | 1072 | for(;;) { |
1073 | tid = trackdb_begin_transaction(); | |
1074 | if((err = gettrackdata(track, &t, &p, 0, | |
1075 | 0, tid)) == DB_LOCK_DEADLOCK) | |
1076 | goto fail; | |
1077 | if(err == DB_NOTFOUND) break; | |
1078 | if(name[0] == '_') { | |
1079 | if(kvp_set(&t, name, value)) | |
1080 | if(trackdb_putdata(trackdb_tracksdb, track, t, tid, 0)) | |
1081 | goto fail; | |
1082 | } else { | |
1083 | /* get the old alias name */ | |
1084 | if(compute_alias(&oldalias, track, p, tid)) goto fail; | |
1085 | /* get the old tags */ | |
1086 | if(!strcmp(name, "tags")) | |
1087 | oldtags = parsetags(kvp_get(p, "tags")); | |
1088 | /* set the value */ | |
1089 | if(kvp_set(&p, name, value)) | |
1090 | if(trackdb_putdata(trackdb_prefsdb, track, p, tid, 0)) | |
1091 | goto fail; | |
1092 | /* compute the new alias name */ | |
1093 | if((err = compute_alias(&newalias, track, p, tid))) goto fail; | |
1094 | /* check whether alias has changed */ | |
1095 | if(!(oldalias == newalias | |
1096 | || (oldalias && newalias && !strcmp(oldalias, newalias)))) { | |
1097 | /* adjust alias records to fit change */ | |
1098 | if(oldalias | |
1099 | && trackdb_delkey(trackdb_tracksdb, oldalias, tid)) goto fail; | |
1100 | if(newalias) { | |
1101 | a = 0; | |
1102 | kvp_set(&a, "_alias_for", track); | |
1103 | if(trackdb_putdata(trackdb_tracksdb, newalias, a, tid, 0)) goto fail; | |
1104 | } | |
1105 | } | |
1106 | /* check whether tags have changed */ | |
1107 | if(!strcmp(name, "tags")) { | |
1108 | newtags = parsetags(value); | |
1109 | while(*oldtags || *newtags) { | |
1110 | if(*oldtags && *newtags) { | |
1111 | cmp = strcmp(*oldtags, *newtags); | |
1112 | if(!cmp) { | |
1113 | /* keeping this tag */ | |
1114 | ++oldtags; | |
1115 | ++newtags; | |
1116 | } else if(cmp < 0) | |
1117 | /* old tag fits into a gap in the new list, so delete old */ | |
1118 | goto delete_old; | |
1119 | else | |
1120 | /* new tag fits into a gap in the old list, so insert new */ | |
1121 | goto insert_new; | |
1122 | } else if(*oldtags) { | |
1123 | /* we've run out of new tags, so remaining old ones are to be | |
1124 | * deleted */ | |
1125 | delete_old: | |
1126 | if(trackdb_delkeydata(trackdb_tagsdb, | |
1127 | *oldtags, track, tid) == DB_LOCK_DEADLOCK) | |
1128 | goto fail; | |
1129 | ++oldtags; | |
1130 | } else { | |
1131 | /* we've run out of old tags, so remainig new ones are to be | |
1132 | * inserted */ | |
1133 | insert_new: | |
1134 | if(register_tag(track, *newtags, tid)) goto fail; | |
1135 | ++newtags; | |
1136 | } | |
1137 | } | |
1138 | reqtracks = 0; | |
1139 | } | |
1140 | } | |
1141 | err = 0; | |
1142 | break; | |
1143 | fail: | |
1144 | trackdb_abort_transaction(tid); | |
1145 | } | |
1146 | trackdb_commit_transaction(tid); | |
1147 | return err == 0 ? 0 : -1; | |
1148 | } | |
1149 | ||
1150 | /* get a pref */ | |
1151 | const char *trackdb_get(const char *track, | |
1152 | const char *name) { | |
1153 | return kvp_get(trackdb_get_all(track), name); | |
1154 | } | |
1155 | ||
1156 | /* get all prefs as a 0-terminated array */ | |
1157 | struct kvp *trackdb_get_all(const char *track) { | |
1158 | struct kvp *t, *p, **pp; | |
1159 | DB_TXN *tid; | |
1160 | ||
1161 | for(;;) { | |
1162 | tid = trackdb_begin_transaction(); | |
1163 | if(gettrackdata(track, &t, &p, 0, 0, tid) == DB_LOCK_DEADLOCK) | |
1164 | goto fail; | |
1165 | break; | |
1166 | fail: | |
1167 | trackdb_abort_transaction(tid); | |
1168 | } | |
1169 | trackdb_commit_transaction(tid); | |
1170 | for(pp = &p; *pp; pp = &(*pp)->next) | |
1171 | ; | |
1172 | *pp = t; | |
1173 | return p; | |
1174 | } | |
1175 | ||
1176 | /* resolve alias */ | |
1177 | const char *trackdb_resolve(const char *track) { | |
1178 | DB_TXN *tid; | |
1179 | const char *actual; | |
1180 | ||
1181 | for(;;) { | |
1182 | tid = trackdb_begin_transaction(); | |
1183 | if(gettrackdata(track, 0, 0, &actual, 0, tid) == DB_LOCK_DEADLOCK) | |
1184 | goto fail; | |
1185 | break; | |
1186 | fail: | |
1187 | trackdb_abort_transaction(tid); | |
1188 | } | |
1189 | trackdb_commit_transaction(tid); | |
1190 | return actual; | |
1191 | } | |
1192 | ||
1193 | int trackdb_isalias(const char *track) { | |
1194 | const char *actual = trackdb_resolve(track); | |
1195 | ||
1196 | return strcmp(actual, track); | |
1197 | } | |
1198 | ||
1199 | /* test whether a track exists (perhaps an alias) */ | |
1200 | int trackdb_exists(const char *track) { | |
1201 | DB_TXN *tid; | |
1202 | int err; | |
1203 | ||
1204 | for(;;) { | |
1205 | tid = trackdb_begin_transaction(); | |
1206 | /* unusually, here we want the return value */ | |
1207 | if((err = gettrackdata(track, 0, 0, 0, 0, tid)) == DB_LOCK_DEADLOCK) | |
1208 | goto fail; | |
1209 | break; | |
1210 | fail: | |
1211 | trackdb_abort_transaction(tid); | |
1212 | } | |
1213 | trackdb_commit_transaction(tid); | |
1214 | return (err == 0); | |
1215 | } | |
1216 | ||
1217 | /* return the list of tags */ | |
1218 | char **trackdb_alltags(void) { | |
1219 | DB_TXN *tid; | |
1220 | int err; | |
1221 | char **taglist; | |
1222 | ||
1223 | for(;;) { | |
1224 | tid = trackdb_begin_transaction(); | |
1225 | err = trackdb_alltags_tid(tid, &taglist); | |
1226 | if(!err) break; | |
1227 | trackdb_abort_transaction(tid); | |
1228 | } | |
1229 | trackdb_commit_transaction(tid); | |
1230 | return taglist; | |
1231 | } | |
1232 | ||
1233 | static int trackdb_alltags_tid(DB_TXN *tid, char ***taglistp) { | |
1234 | struct vector v; | |
1235 | DBC *c; | |
1236 | DBT k, d; | |
1237 | int err; | |
1238 | ||
1239 | vector_init(&v); | |
1240 | c = trackdb_opencursor(trackdb_tagsdb, tid); | |
1241 | memset(&k, 0, sizeof k); | |
1242 | while(!(err = c->c_get(c, &k, prepare_data(&d), DB_NEXT_NODUP))) | |
1243 | vector_append(&v, xstrndup(k.data, k.size)); | |
1244 | switch(err) { | |
1245 | case DB_NOTFOUND: | |
1246 | break; | |
1247 | case DB_LOCK_DEADLOCK: | |
1248 | return err; | |
1249 | default: | |
1250 | fatal(0, "c->c_get: %s", db_strerror(err)); | |
1251 | } | |
1252 | if((err = trackdb_closecursor(c))) return err; | |
1253 | vector_terminate(&v); | |
1254 | *taglistp = v.vec; | |
1255 | return 0; | |
1256 | } | |
1257 | ||
1258 | /* return 1 iff sorted tag lists A and B have at least one member in common */ | |
1259 | static int tag_intersection(char **a, char **b) { | |
1260 | int cmp; | |
1261 | ||
1262 | /* Same sort of logic as trackdb_set() above */ | |
1263 | while(*a && *b) { | |
1264 | if(!(cmp = strcmp(*a, *b))) return 1; | |
1265 | else if(cmp < 0) ++a; | |
1266 | else ++b; | |
1267 | } | |
1268 | return 0; | |
1269 | } | |
1270 | ||
1271 | /* Check whether a track is suitable for random play. Returns 0 if it is, | |
6aba3f6c RK |
1272 | * DB_NOTFOUND if it is not or DB_LOCK_DEADLOCK if the database gave us |
1273 | * that. */ | |
460b9539 | 1274 | static int check_suitable(const char *track, |
1275 | DB_TXN *tid, | |
1276 | char **required_tags, | |
1277 | char **prohibited_tags) { | |
1278 | char **track_tags; | |
1279 | time_t last, now; | |
1280 | struct kvp *p, *t; | |
1281 | const char *pick_at_random, *played_time; | |
1282 | ||
6aba3f6c RK |
1283 | /* don't pick tracks that aren't in any surviving collection (for instance |
1284 | * you've edited the config but the rescan hasn't done its job yet) */ | |
1285 | if(!find_track_root(track)) { | |
1286 | info("found track not in any collection: %s", track); | |
1287 | return DB_NOTFOUND; | |
1288 | } | |
460b9539 | 1289 | /* don't pick aliases - only pick the canonical form */ |
1290 | if(gettrackdata(track, &t, &p, 0, 0, tid) == DB_LOCK_DEADLOCK) | |
1291 | return DB_LOCK_DEADLOCK; | |
1292 | if(kvp_get(t, "_alias_for")) | |
1293 | return DB_NOTFOUND; | |
1294 | /* check that random play is not suppressed for this track */ | |
1295 | if((pick_at_random = kvp_get(p, "pick_at_random")) | |
1296 | && !strcmp(pick_at_random, "0")) | |
1297 | return DB_NOTFOUND; | |
1298 | /* don't pick a track that's been played in the last 8 hours */ | |
1299 | if((played_time = kvp_get(p, "played_time"))) { | |
1300 | last = atoll(played_time); | |
1301 | now = time(0); | |
1302 | if(now < last + 8 * 3600) /* TODO configurable */ | |
1303 | return DB_NOTFOUND; | |
1304 | } | |
1305 | track_tags = parsetags(kvp_get(p, "tags")); | |
1306 | /* check that no prohibited tag is present for this track */ | |
1307 | if(prohibited_tags && tag_intersection(track_tags, prohibited_tags)) | |
1308 | return DB_NOTFOUND; | |
1309 | /* check that at least one required tags is present for this track */ | |
1310 | if(*required_tags && !tag_intersection(track_tags, required_tags)) | |
1311 | return DB_NOTFOUND; | |
1312 | return 0; | |
1313 | } | |
1314 | ||
1315 | /* attempt to pick a random non-alias track */ | |
1316 | const char *trackdb_random(int tries) { | |
1317 | DBT key, data; | |
1318 | DB_BTREE_STAT *sp; | |
1319 | int err, n; | |
1320 | DB_TXN *tid; | |
1321 | const char *track, *candidate; | |
1322 | db_recno_t r; | |
1323 | const char *tags; | |
1324 | char **required_tags, **prohibited_tags, **tp; | |
1325 | hash *h; | |
1326 | DBC *c = 0; | |
1327 | ||
1328 | for(;;) { | |
1329 | tid = trackdb_begin_transaction(); | |
1330 | if((err = trackdb_get_global_tid("required-tags", tid, &tags))) | |
1331 | goto fail; | |
1332 | required_tags = parsetags(tags); | |
1333 | if((err = trackdb_get_global_tid("prohibited-tags", tid, &tags))) | |
1334 | goto fail; | |
1335 | prohibited_tags = parsetags(tags); | |
1336 | track = 0; | |
1337 | if(*required_tags) { | |
1338 | /* Bung all the suitable tracks into a hash and convert to a list of keys | |
1339 | * (to eliminate duplicates). We cache this list since it is possible | |
1340 | * that it will be very large. */ | |
1341 | if(!reqtracks) { | |
1342 | h = hash_new(0); | |
1343 | for(tp = required_tags; *tp; ++tp) { | |
1344 | c = trackdb_opencursor(trackdb_tagsdb, tid); | |
1345 | memset(&key, 0, sizeof key); | |
1346 | key.data = *tp; | |
1347 | key.size = strlen(*tp); | |
1348 | n = 0; | |
1349 | err = c->c_get(c, &key, prepare_data(&data), DB_SET); | |
1350 | while(err == 0) { | |
1351 | hash_add(h, xstrndup(data.data, data.size), 0, | |
1352 | HASH_INSERT_OR_REPLACE); | |
1353 | ++n; | |
1354 | err = c->c_get(c, &key, prepare_data(&data), DB_NEXT_DUP); | |
1355 | } | |
1356 | switch(err) { | |
1357 | case 0: | |
1358 | case DB_NOTFOUND: | |
1359 | break; | |
1360 | case DB_LOCK_DEADLOCK: | |
1361 | goto fail; | |
1362 | default: | |
1363 | fatal(0, "error querying tags.db: %s", db_strerror(err)); | |
1364 | } | |
1365 | trackdb_closecursor(c); | |
1366 | c = 0; | |
1367 | if(!n) | |
1368 | error(0, "required tag %s does not match any tracks", *tp); | |
1369 | } | |
1370 | nreqtracks = hash_count(h); | |
1371 | reqtracks = hash_keys(h); | |
1372 | } | |
1373 | while(nreqtracks && !track && tries-- > 0) { | |
1374 | r = (rand() * (double)nreqtracks / (RAND_MAX + 1.0)); | |
1375 | candidate = reqtracks[r]; | |
1376 | switch(check_suitable(candidate, tid, | |
1377 | required_tags, prohibited_tags)) { | |
1378 | case 0: | |
1379 | track = candidate; | |
1380 | break; | |
1381 | case DB_NOTFOUND: | |
1382 | break; | |
1383 | case DB_LOCK_DEADLOCK: | |
1384 | goto fail; | |
1385 | } | |
1386 | } | |
1387 | } else { | |
1388 | /* No required tags. We pick random record numbers in the database | |
1389 | * instead. */ | |
58a4416c | 1390 | switch(err = trackdb_tracksdb->stat(trackdb_tracksdb, tid, &sp, 0)) { |
460b9539 | 1391 | case 0: |
1392 | break; | |
1393 | case DB_LOCK_DEADLOCK: | |
1394 | error(0, "error querying tracks.db: %s", db_strerror(err)); | |
1395 | goto fail; | |
1396 | default: | |
1397 | fatal(0, "error querying tracks.db: %s", db_strerror(err)); | |
1398 | } | |
1399 | if(!sp->bt_nkeys) | |
1400 | error(0, "cannot pick tracks at random from an empty database"); | |
1401 | while(sp->bt_nkeys && !track && tries-- > 0) { | |
1402 | /* record numbers count from 1 upwards */ | |
1403 | r = 1 + (rand() * (double)sp->bt_nkeys / (RAND_MAX + 1.0)); | |
1404 | memset(&key, sizeof key, 0); | |
1405 | key.flags = DB_DBT_MALLOC; | |
1406 | key.size = sizeof r; | |
1407 | key.data = &r; | |
1408 | switch(err = trackdb_tracksdb->get(trackdb_tracksdb, tid, &key, prepare_data(&data), | |
1409 | DB_SET_RECNO)) { | |
1410 | case 0: | |
1411 | break; | |
1412 | case DB_LOCK_DEADLOCK: | |
1413 | error(0, "error querying tracks.db: %s", db_strerror(err)); | |
1414 | goto fail; | |
1415 | default: | |
1416 | fatal(0, "error querying tracks.db: %s", db_strerror(err)); | |
1417 | } | |
1418 | candidate = xstrndup(key.data, key.size); | |
1419 | switch(check_suitable(candidate, tid, | |
1420 | required_tags, prohibited_tags)) { | |
1421 | case 0: | |
1422 | track = candidate; | |
1423 | break; | |
1424 | case DB_NOTFOUND: | |
1425 | break; | |
1426 | case DB_LOCK_DEADLOCK: | |
1427 | goto fail; | |
1428 | } | |
1429 | } | |
1430 | } | |
1431 | break; | |
1432 | fail: | |
1433 | trackdb_closecursor(c); | |
1434 | c = 0; | |
1435 | trackdb_abort_transaction(tid); | |
1436 | } | |
1437 | trackdb_commit_transaction(tid); | |
1438 | if(!track) | |
1439 | error(0, "could not pick a random track"); | |
1440 | return track; | |
1441 | } | |
1442 | ||
1443 | /* get a track name given the prefs. Set *used_db to 1 if we got the answer | |
1444 | * from the prefs. */ | |
1445 | static const char *getpart(const char *track, | |
1446 | const char *context, | |
1447 | const char *part, | |
1448 | const struct kvp *p, | |
1449 | int *used_db) { | |
1450 | const char *result; | |
1451 | char *pref; | |
1452 | ||
1453 | byte_xasprintf(&pref, "trackname_%s_%s", context, part); | |
1454 | if((result = kvp_get(p, pref))) | |
1455 | *used_db = 1; | |
1456 | else | |
1457 | result = trackname_part(track, context, part); | |
1458 | assert(result != 0); | |
1459 | return result; | |
1460 | } | |
1461 | ||
1462 | /* get a track name part, like trackname_part(), but taking the database into | |
1463 | * account. */ | |
1464 | const char *trackdb_getpart(const char *track, | |
1465 | const char *context, | |
1466 | const char *part) { | |
1467 | struct kvp *p; | |
1468 | DB_TXN *tid; | |
1469 | char *pref; | |
1470 | const char *actual; | |
1471 | int used_db, err; | |
1472 | ||
1473 | /* construct the full pref */ | |
1474 | byte_xasprintf(&pref, "trackname_%s_%s", context, part); | |
1475 | for(;;) { | |
1476 | tid = trackdb_begin_transaction(); | |
1477 | if((err = gettrackdata(track, 0, &p, &actual, 0, tid)) == DB_LOCK_DEADLOCK) | |
1478 | goto fail; | |
1479 | break; | |
1480 | fail: | |
1481 | trackdb_abort_transaction(tid); | |
1482 | } | |
1483 | trackdb_commit_transaction(tid); | |
1484 | return getpart(actual, context, part, p, &used_db); | |
1485 | } | |
1486 | ||
1487 | /* get the raw path name for @track@ (might be an alias) */ | |
1488 | const char *trackdb_rawpath(const char *track) { | |
1489 | DB_TXN *tid; | |
1490 | struct kvp *t; | |
1491 | const char *path; | |
1492 | ||
1493 | for(;;) { | |
1494 | tid = trackdb_begin_transaction(); | |
1495 | if(gettrackdata(track, &t, 0, 0, 0, tid) == DB_LOCK_DEADLOCK) | |
1496 | goto fail; | |
1497 | break; | |
1498 | fail: | |
1499 | trackdb_abort_transaction(tid); | |
1500 | } | |
1501 | trackdb_commit_transaction(tid); | |
1502 | if(!(path = kvp_get(t, "_path"))) path = track; | |
1503 | return path; | |
1504 | } | |
1505 | ||
1506 | /* trackdb_list **************************************************************/ | |
1507 | ||
1508 | /* this is incredibly ugly, sorry, perhaps it will be rewritten to be actually | |
1509 | * readable at some point */ | |
1510 | ||
1511 | /* return true if the basename of TRACK[0..TL-1], as defined by DL, matches RE. | |
1512 | * If RE is a null pointer then it matches everything. */ | |
1513 | static int track_matches(size_t dl, const char *track, size_t tl, | |
1514 | const pcre *re) { | |
1515 | int ovec[3], rc; | |
1516 | ||
1517 | if(!re) | |
1518 | return 1; | |
1519 | track += dl + 1; | |
1520 | tl -= (dl + 1); | |
1521 | switch(rc = pcre_exec(re, 0, track, tl, 0, 0, ovec, 3)) { | |
1522 | case PCRE_ERROR_NOMATCH: return 0; | |
1523 | default: | |
1524 | if(rc < 0) { | |
1525 | error(0, "pcre_exec returned %d, subject '%s'", rc, track); | |
1526 | return 0; | |
1527 | } | |
1528 | return 1; | |
1529 | } | |
1530 | } | |
1531 | ||
1532 | static int do_list(struct vector *v, const char *dir, | |
1533 | enum trackdb_listable what, const pcre *re, DB_TXN *tid) { | |
1534 | DBC *cursor; | |
1535 | DBT k, d; | |
1536 | size_t dl; | |
1537 | char *ptr; | |
1538 | int err; | |
1539 | size_t l, last_dir_len = 0; | |
1540 | char *last_dir = 0, *track, *alias; | |
1541 | struct kvp *p; | |
1542 | ||
1543 | dl = strlen(dir); | |
1544 | cursor = trackdb_opencursor(trackdb_tracksdb, tid); | |
1545 | make_key(&k, dir); | |
1546 | prepare_data(&d); | |
1547 | /* find the first key >= dir */ | |
1548 | err = cursor->c_get(cursor, &k, &d, DB_SET_RANGE); | |
1549 | /* keep going while we're dealing with <dir/anything> */ | |
1550 | while(err == 0 | |
1551 | && k.size > dl | |
1552 | && ((char *)k.data)[dl] == '/' | |
1553 | && !memcmp(k.data, dir, dl)) { | |
1554 | ptr = memchr((char *)k.data + dl + 1, '/', k.size - (dl + 1)); | |
1555 | if(ptr) { | |
1556 | /* we have <dir/component/anything>, so <dir/component> is a directory */ | |
1557 | l = ptr - (char *)k.data; | |
1558 | if(what & trackdb_directories) | |
1559 | if(!(last_dir | |
1560 | && l == last_dir_len | |
1561 | && !memcmp(last_dir, k.data, l))) { | |
1562 | last_dir = xstrndup(k.data, last_dir_len = l); | |
1563 | if(track_matches(dl, k.data, l, re)) | |
1564 | vector_append(v, last_dir); | |
1565 | } | |
1566 | } else { | |
1567 | /* found a plain file */ | |
1568 | if((what & trackdb_files)) { | |
1569 | track = xstrndup(k.data, k.size); | |
1570 | if((err = trackdb_getdata(trackdb_prefsdb, | |
1571 | track, &p, tid)) == DB_LOCK_DEADLOCK) | |
1572 | goto deadlocked; | |
1573 | /* if this file has an alias in the same directory then we skip it */ | |
1574 | if((err = compute_alias(&alias, track, p, tid))) | |
1575 | goto deadlocked; | |
1576 | if(!(alias && !strcmp(d_dirname(alias), d_dirname(track)))) | |
1577 | if(track_matches(dl, k.data, k.size, re)) | |
1578 | vector_append(v, track); | |
1579 | } | |
1580 | } | |
1581 | err = cursor->c_get(cursor, &k, &d, DB_NEXT); | |
1582 | } | |
1583 | switch(err) { | |
1584 | case 0: | |
1585 | break; | |
1586 | case DB_NOTFOUND: | |
1587 | err = 0; | |
1588 | break; | |
1589 | case DB_LOCK_DEADLOCK: | |
1590 | error(0, "error querying database: %s", db_strerror(err)); | |
1591 | break; | |
1592 | default: | |
1593 | fatal(0, "error querying database: %s", db_strerror(err)); | |
1594 | } | |
1595 | deadlocked: | |
1596 | if(trackdb_closecursor(cursor)) err = DB_LOCK_DEADLOCK; | |
1597 | return err; | |
1598 | } | |
1599 | ||
1600 | /* return the directories or files below @dir@ */ | |
1601 | char **trackdb_list(const char *dir, int *np, enum trackdb_listable what, | |
1602 | const pcre *re) { | |
1603 | DB_TXN *tid; | |
1604 | int n; | |
1605 | struct vector v; | |
1606 | ||
1607 | vector_init(&v); | |
1608 | for(;;) { | |
1609 | tid = trackdb_begin_transaction(); | |
1610 | v.nvec = 0; | |
1611 | if(dir) { | |
1612 | if(do_list(&v, dir, what, re, tid)) | |
1613 | goto fail; | |
1614 | } else { | |
1615 | for(n = 0; n < config->collection.n; ++n) | |
1616 | if(do_list(&v, config->collection.s[n].root, what, re, tid)) | |
1617 | goto fail; | |
1618 | } | |
1619 | break; | |
1620 | fail: | |
1621 | trackdb_abort_transaction(tid); | |
1622 | } | |
1623 | trackdb_commit_transaction(tid); | |
1624 | vector_terminate(&v); | |
1625 | if(np) | |
1626 | *np = v.nvec; | |
1627 | return v.vec; | |
1628 | } | |
1629 | ||
1630 | /* If S is tag:something, return something. Else return 0. */ | |
1631 | static const char *checktag(const char *s) { | |
1632 | if(!strncmp(s, "tag:", 4)) | |
1633 | return s + 4; | |
1634 | else | |
1635 | return 0; | |
1636 | } | |
1637 | ||
1638 | /* return a list of tracks containing all of the words given. If you | |
1639 | * ask for only stopwords you get no tracks. */ | |
1640 | char **trackdb_search(char **wordlist, int nwordlist, int *ntracks) { | |
1641 | const char **w, *best = 0, *tag; | |
1642 | char **twords, **tags; | |
1643 | int i, j, n, err, what; | |
1644 | DBC *cursor = 0; | |
1645 | DBT k, d; | |
1646 | struct vector u, v; | |
1647 | DB_TXN *tid; | |
1648 | struct kvp *p; | |
1649 | int ntags = 0; | |
1650 | DB *db; | |
1651 | const char *dbname; | |
1652 | ||
1653 | *ntracks = 0; /* for early returns */ | |
1654 | /* casefold all the words */ | |
1655 | w = xmalloc(nwordlist * sizeof (char *)); | |
1656 | for(n = 0; n < nwordlist; ++n) { | |
1657 | w[n] = casefold(wordlist[n]); | |
1658 | if(checktag(w[n])) ++ntags; /* count up tags */ | |
1659 | } | |
1660 | /* find the longest non-stopword */ | |
1661 | for(n = 0; n < nwordlist; ++n) | |
1662 | if(!stopword(w[n]) && !checktag(w[n])) | |
1663 | if(!best || strlen(w[n]) > strlen(best)) | |
1664 | best = w[n]; | |
1665 | /* TODO: we should at least in principal be able to identify the word or tag | |
1666 | * with the least matches in log time, and choose that as our primary search | |
1667 | * term. */ | |
1668 | if(ntags && !best) { | |
1669 | /* Only tags are listed. We limit to the first and narrow down with the | |
1670 | * rest. */ | |
1671 | best = checktag(w[0]); | |
1672 | db = trackdb_tagsdb; | |
1673 | dbname = "tags"; | |
1674 | } else if(best) { | |
1675 | /* We can limit to some word. */ | |
1676 | db = trackdb_searchdb; | |
1677 | dbname = "search"; | |
1678 | } else { | |
1679 | /* Only stopwords */ | |
1680 | return 0; | |
1681 | } | |
1682 | vector_init(&u); | |
1683 | vector_init(&v); | |
1684 | for(;;) { | |
1685 | tid = trackdb_begin_transaction(); | |
1686 | /* find all the tracks that have that word */ | |
1687 | make_key(&k, best); | |
1688 | prepare_data(&d); | |
1689 | what = DB_SET; | |
1690 | v.nvec = 0; | |
1691 | cursor = trackdb_opencursor(db, tid); | |
1692 | while(!(err = cursor->c_get(cursor, &k, &d, what))) { | |
1693 | vector_append(&v, xstrndup(d.data, d.size)); | |
1694 | what = DB_NEXT_DUP; | |
1695 | } | |
1696 | switch(err) { | |
1697 | case DB_NOTFOUND: | |
1698 | err = 0; | |
1699 | break; | |
1700 | case DB_LOCK_DEADLOCK: | |
1701 | error(0, "error querying %s database: %s", dbname, db_strerror(err)); | |
1702 | break; | |
1703 | default: | |
1704 | fatal(0, "error querying %s database: %s", dbname, db_strerror(err)); | |
1705 | } | |
1706 | if(trackdb_closecursor(cursor)) err = DB_LOCK_DEADLOCK; | |
1707 | cursor = 0; | |
1708 | /* do a naive search over that (hopefuly fairly small) list of tracks */ | |
1709 | u.nvec = 0; | |
1710 | for(n = 0; n < v.nvec; ++n) { | |
1711 | if((err = gettrackdata(v.vec[n], 0, &p, 0, 0, tid) == DB_LOCK_DEADLOCK)) | |
1712 | goto fail; | |
1713 | else if(err) { | |
1714 | error(0, "track %s unexpected error: %s", v.vec[n], db_strerror(err)); | |
1715 | continue; | |
1716 | } | |
1717 | twords = track_to_words(v.vec[n], p); | |
1718 | tags = parsetags(kvp_get(p, "tags")); | |
1719 | for(i = 0; i < nwordlist; ++i) { | |
1720 | if((tag = checktag(w[i]))) { | |
1721 | /* Track must have this tag */ | |
1722 | for(j = 0; tags[j]; ++j) | |
1723 | if(!strcmp(tag, tags[j])) break; /* tag found */ | |
1724 | if(!tags[j]) break; /* tag not found */ | |
1725 | } else { | |
1726 | /* Track must contain this word */ | |
1727 | for(j = 0; twords[j]; ++j) | |
1728 | if(!strcmp(w[i], twords[j])) break; /* word found */ | |
1729 | if(!twords[j]) break; /* word not found */ | |
1730 | } | |
1731 | } | |
1732 | if(i >= nwordlist) /* all words found */ | |
1733 | vector_append(&u, v.vec[n]); | |
1734 | } | |
1735 | break; | |
1736 | fail: | |
1737 | trackdb_closecursor(cursor); | |
1738 | cursor = 0; | |
1739 | trackdb_abort_transaction(tid); | |
1740 | info("retrying search"); | |
1741 | } | |
1742 | trackdb_commit_transaction(tid); | |
1743 | vector_terminate(&u); | |
1744 | if(ntracks) | |
1745 | *ntracks = u.nvec; | |
1746 | return u.vec; | |
1747 | } | |
1748 | ||
1749 | /* trackdb_scan **************************************************************/ | |
1750 | ||
1751 | int trackdb_scan(const char *root, | |
1752 | int (*callback)(const char *track, | |
1753 | struct kvp *data, | |
1754 | void *u, | |
1755 | DB_TXN *tid), | |
1756 | void *u, | |
1757 | DB_TXN *tid) { | |
1758 | DBC *cursor; | |
1759 | DBT k, d; | |
d1694464 | 1760 | const size_t root_len = root ? strlen(root) : 0; |
1761 | int err, cberr; | |
460b9539 | 1762 | struct kvp *data; |
d1694464 | 1763 | const char *track; |
460b9539 | 1764 | |
1765 | cursor = trackdb_opencursor(trackdb_tracksdb, tid); | |
d1694464 | 1766 | if(root) |
1767 | err = cursor->c_get(cursor, make_key(&k, root), prepare_data(&d), | |
1768 | DB_SET_RANGE); | |
1769 | else { | |
1770 | memset(&k, 0, sizeof k); | |
1771 | err = cursor->c_get(cursor, &k, prepare_data(&d), | |
1772 | DB_FIRST); | |
1773 | } | |
460b9539 | 1774 | while(!err) { |
d1694464 | 1775 | if(!root |
1776 | || (k.size > root_len | |
1777 | && !strncmp(k.data, root, root_len) | |
1778 | && ((char *)k.data)[root_len] == '/')) { | |
460b9539 | 1779 | data = kvp_urldecode(d.data, d.size); |
d1694464 | 1780 | if(kvp_get(data, "_path")) { |
1781 | track = xstrndup(k.data, k.size); | |
1782 | /* Advance to the next track before the callback so that the callback | |
1783 | * may safely delete the track */ | |
1784 | err = cursor->c_get(cursor, &k, &d, DB_NEXT); | |
1785 | if((cberr = callback(track, data, u, tid))) { | |
1786 | err = cberr; | |
460b9539 | 1787 | break; |
d1694464 | 1788 | } |
1789 | } else | |
1790 | err = cursor->c_get(cursor, &k, &d, DB_NEXT); | |
460b9539 | 1791 | } else |
1792 | break; | |
1793 | } | |
1794 | trackdb_closecursor(cursor); | |
1795 | switch(err) { | |
1796 | case EINTR: | |
1797 | return err; | |
1798 | case 0: | |
1799 | case DB_NOTFOUND: | |
1800 | return 0; | |
1801 | case DB_LOCK_DEADLOCK: | |
1802 | error(0, "c->c_get: %s", db_strerror(err)); | |
1803 | return err; | |
1804 | default: | |
1805 | fatal(0, "c->c_get: %s", db_strerror(err)); | |
1806 | } | |
1807 | } | |
1808 | ||
1809 | /* trackdb_rescan ************************************************************/ | |
1810 | ||
1811 | /* called when the rescanner terminates */ | |
1812 | static int reap_rescan(ev_source attribute((unused)) *ev, | |
1813 | pid_t pid, | |
1814 | int status, | |
1815 | const struct rusage attribute((unused)) *rusage, | |
1816 | void attribute((unused)) *u) { | |
1817 | if(pid == rescan_pid) rescan_pid = -1; | |
1818 | if(status) | |
1819 | error(0, "disorderd-rescan: %s", wstat(status)); | |
1820 | else | |
1821 | D(("disorderd-rescan terminate: %s", wstat(status))); | |
1822 | /* Our cache of file lookups is out of date now */ | |
1823 | cache_clean(&cache_files_type); | |
e025abff | 1824 | eventlog("rescanned", (char *)0); |
460b9539 | 1825 | return 0; |
1826 | } | |
1827 | ||
1828 | void trackdb_rescan(ev_source *ev) { | |
1829 | if(rescan_pid != -1) { | |
1830 | error(0, "rescan already underway"); | |
1831 | return; | |
1832 | } | |
d6dde5a3 | 1833 | rescan_pid = subprogram(ev, RESCAN, -1); |
460b9539 | 1834 | ev_child(ev, rescan_pid, 0, reap_rescan, 0); |
1835 | D(("started rescanner")); | |
1836 | ||
1837 | } | |
1838 | ||
1839 | int trackdb_rescan_cancel(void) { | |
1840 | if(rescan_pid == -1) return 0; | |
1841 | if(kill(rescan_pid, SIGTERM) < 0) | |
1842 | fatal(errno, "error killing rescanner"); | |
1843 | rescan_pid = -1; | |
1844 | return 1; | |
1845 | } | |
1846 | ||
1847 | /* global prefs **************************************************************/ | |
1848 | ||
1849 | void trackdb_set_global(const char *name, | |
1850 | const char *value, | |
1851 | const char *who) { | |
1852 | DB_TXN *tid; | |
1853 | DBT k, d; | |
1854 | int err; | |
1855 | int state; | |
1856 | ||
1857 | memset(&k, 0, sizeof k); | |
1858 | memset(&d, 0, sizeof d); | |
1859 | k.data = (void *)name; | |
1860 | k.size = strlen(name); | |
1861 | if(value) { | |
1862 | d.data = (void *)value; | |
1863 | d.size = strlen(value); | |
1864 | } | |
1865 | for(;;) { | |
1866 | tid = trackdb_begin_transaction(); | |
1867 | if(value) | |
1868 | err = trackdb_globaldb->put(trackdb_globaldb, tid, &k, &d, 0); | |
1869 | else | |
1870 | err = trackdb_globaldb->del(trackdb_globaldb, tid, &k, 0); | |
1871 | if(!err || err == DB_NOTFOUND) break; | |
1872 | if(err != DB_LOCK_DEADLOCK) | |
1873 | fatal(0, "error updating database: %s", db_strerror(err)); | |
1874 | trackdb_abort_transaction(tid); | |
1875 | } | |
1876 | trackdb_commit_transaction(tid); | |
1877 | /* log important state changes */ | |
1878 | if(!strcmp(name, "playing")) { | |
1879 | state = !value || !strcmp(value, "yes"); | |
1880 | info("playing %s by %s", | |
1881 | state ? "enabled" : "disabled", | |
1882 | who ? who : "-"); | |
1883 | eventlog("state", state ? "enable_play" : "disable_play", (char *)0); | |
1884 | } | |
1885 | if(!strcmp(name, "random-play")) { | |
1886 | state = !value || !strcmp(value, "yes"); | |
1887 | info("random play %s by %s", | |
1888 | state ? "enabled" : "disabled", | |
1889 | who ? who : "-"); | |
1890 | eventlog("state", state ? "enable_random" : "disable_random", (char *)0); | |
1891 | } | |
1892 | if(!strcmp(name, "required-tags")) | |
1893 | reqtracks = 0; | |
1894 | } | |
1895 | ||
1896 | const char *trackdb_get_global(const char *name) { | |
1897 | DB_TXN *tid; | |
1898 | int err; | |
1899 | const char *r; | |
1900 | ||
1901 | for(;;) { | |
1902 | tid = trackdb_begin_transaction(); | |
1903 | if(!(err = trackdb_get_global_tid(name, tid, &r))) | |
1904 | break; | |
1905 | trackdb_abort_transaction(tid); | |
1906 | } | |
1907 | trackdb_commit_transaction(tid); | |
1908 | return r; | |
1909 | } | |
1910 | ||
1911 | static int trackdb_get_global_tid(const char *name, | |
1912 | DB_TXN *tid, | |
1913 | const char **rp) { | |
1914 | DBT k, d; | |
1915 | int err; | |
1916 | ||
1917 | memset(&k, 0, sizeof k); | |
1918 | k.data = (void *)name; | |
1919 | k.size = strlen(name); | |
1920 | switch(err = trackdb_globaldb->get(trackdb_globaldb, tid, &k, | |
1921 | prepare_data(&d), 0)) { | |
1922 | case 0: | |
1923 | *rp = xstrndup(d.data, d.size); | |
1924 | return 0; | |
1925 | case DB_NOTFOUND: | |
1926 | *rp = 0; | |
1927 | return 0; | |
1928 | case DB_LOCK_DEADLOCK: | |
1929 | return err; | |
1930 | default: | |
1931 | fatal(0, "error updating database: %s", db_strerror(err)); | |
1932 | } | |
1933 | } | |
1934 | ||
2a10b70b RK |
1935 | /** @brief Retrieve the most recently added tracks |
1936 | * @param ntracksp Where to put count, or 0 | |
1937 | * @param maxtracks Maximum number of tracks to retrieve | |
1938 | * @return null-terminated array of track names | |
1939 | * | |
1940 | * The most recently added track is first in the array. | |
1941 | */ | |
1942 | char **trackdb_new(int *ntracksp, | |
1943 | int maxtracks) { | |
1944 | DB_TXN *tid; | |
1945 | char **tracks; | |
1946 | ||
1947 | for(;;) { | |
1948 | tid = trackdb_begin_transaction(); | |
1949 | tracks = trackdb_new_tid(ntracksp, maxtracks, tid); | |
1950 | if(tracks) | |
1951 | break; | |
1952 | trackdb_abort_transaction(tid); | |
1953 | } | |
1954 | trackdb_commit_transaction(tid); | |
1955 | return tracks; | |
1956 | } | |
1957 | ||
1958 | /** @brief Retrieve the most recently added tracks | |
1959 | * @param ntracksp Where to put count, or 0 | |
1960 | * @param maxtracks Maximum number of tracks to retrieve, or 0 for all | |
1961 | * @param tid Transaction ID | |
1962 | * @return null-terminated array of track names, or NULL on deadlock | |
1963 | * | |
1964 | * The most recently added track is first in the array. | |
1965 | */ | |
1966 | static char **trackdb_new_tid(int *ntracksp, | |
1967 | int maxtracks, | |
1968 | DB_TXN *tid) { | |
1969 | DBC *c; | |
1970 | DBT k, d; | |
1971 | int err = 0; | |
1972 | struct vector tracks[1]; | |
1973 | ||
1974 | vector_init(tracks); | |
1975 | c = trackdb_opencursor(trackdb_noticeddb, tid); | |
1976 | while((maxtracks <= 0 || tracks->nvec < maxtracks) | |
1977 | && !(err = c->c_get(c, prepare_data(&k), prepare_data(&d), DB_PREV))) | |
1978 | vector_append(tracks, xstrndup(d.data, d.size)); | |
1979 | switch(err) { | |
1980 | case 0: /* hit maxtracks */ | |
1981 | case DB_NOTFOUND: /* ran out of tracks */ | |
1982 | break; | |
1983 | case DB_LOCK_DEADLOCK: | |
1984 | trackdb_closecursor(c); | |
1985 | return 0; | |
1986 | default: | |
1987 | fatal(0, "error reading noticed.db: %s", db_strerror(err)); | |
1988 | } | |
1989 | if((err = trackdb_closecursor(c))) | |
1990 | return 0; /* deadlock */ | |
1991 | vector_terminate(tracks); | |
1992 | if(ntracksp) | |
1993 | *ntracksp = tracks->nvec; | |
1994 | return tracks->vec; | |
1995 | } | |
1996 | ||
1e64e9fb RK |
1997 | /** @brief Expire noticed.db |
1998 | * @param earliest Earliest timestamp to keep | |
1999 | */ | |
2000 | void trackdb_expire_noticed(time_t earliest) { | |
2001 | DB_TXN *tid; | |
2002 | ||
2003 | for(;;) { | |
2004 | tid = trackdb_begin_transaction(); | |
2005 | if(!trackdb_expire_noticed_tid(earliest, tid)) | |
2006 | break; | |
2007 | trackdb_abort_transaction(tid); | |
2008 | } | |
2009 | trackdb_commit_transaction(tid); | |
2010 | } | |
2011 | ||
2012 | /** @brief Expire noticed.db | |
2013 | * @param earliest Earliest timestamp to keep | |
2014 | * @param tid Transaction ID | |
2015 | * @return 0 or DB_LOCK_DEADLOCK | |
2016 | */ | |
2017 | static int trackdb_expire_noticed_tid(time_t earliest, DB_TXN *tid) { | |
2018 | DBC *c; | |
2019 | DBT k, d; | |
2020 | int err = 0, ret; | |
2021 | time_t when; | |
2022 | uint32_t *kk; | |
2023 | int count = 0; | |
2024 | ||
2025 | c = trackdb_opencursor(trackdb_noticeddb, tid); | |
2026 | while(!(err = c->c_get(c, prepare_data(&k), prepare_data(&d), DB_NEXT))) { | |
2027 | kk = k.data; | |
2028 | when = (time_t)(((uint64_t)ntohl(kk[0]) << 32) + ntohl(kk[1])); | |
2029 | if(when >= earliest) | |
2030 | break; | |
2031 | if((err = c->c_del(c, 0))) { | |
2032 | if(err != DB_LOCK_DEADLOCK) | |
2033 | fatal(0, "error deleting expired noticed.db entry: %s", | |
2034 | db_strerror(err)); | |
2035 | break; | |
2036 | } | |
2037 | ++count; | |
2038 | } | |
2039 | if(err == DB_NOTFOUND) | |
2040 | err = 0; | |
2041 | if(err && err != DB_LOCK_DEADLOCK) | |
2042 | fatal(0, "error expiring noticed.db: %s", db_strerror(err)); | |
2043 | ret = err; | |
2044 | if((err = trackdb_closecursor(c))) { | |
2045 | if(err != DB_LOCK_DEADLOCK) | |
2046 | fatal(0, "error closing cursor: %s", db_strerror(err)); | |
2047 | ret = err; | |
2048 | } | |
2049 | if(!ret && count) | |
2050 | info("expired %d tracks from noticed.db", count); | |
2051 | return ret; | |
2052 | } | |
2053 | ||
460b9539 | 2054 | /* tidying up ****************************************************************/ |
2055 | ||
2056 | void trackdb_gc(void) { | |
2057 | int err; | |
2058 | char **logfiles; | |
2059 | ||
2060 | if((err = trackdb_env->txn_checkpoint(trackdb_env, | |
2061 | config->checkpoint_kbyte, | |
2062 | config->checkpoint_min, | |
2063 | 0))) | |
2064 | fatal(0, "trackdb_env->txn_checkpoint: %s", db_strerror(err)); | |
2065 | if((err = trackdb_env->log_archive(trackdb_env, &logfiles, DB_ARCH_REMOVE))) | |
2066 | fatal(0, "trackdb_env->log_archive: %s", db_strerror(err)); | |
2067 | /* This makes catastrophic recovery impossible. However, the user can still | |
2068 | * preserve the important data by using disorder-dump to snapshot their | |
2069 | * prefs, and later to restore it. This is likely to have much small | |
2070 | * long-term storage requirements than record the db logfiles. */ | |
2071 | } | |
2072 | ||
2073 | /* | |
2074 | Local Variables: | |
2075 | c-basic-offset:2 | |
2076 | comment-column:40 | |
2077 | fill-column:79 | |
2078 | indent-tabs-mode:nil | |
2079 | End: | |
2080 | */ |