2 * This file is part of DisOrder
3 * Copyright (C) 2005, 2006, 2007 Richard Kettlewell
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.
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.
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
20 /** @file server/trackdb.c
21 * @brief Track database */
29 #include <sys/socket.h>
36 #include <sys/resource.h>
38 #include <arpa/inet.h>
46 #include "configuration.h"
51 #include "trackname.h"
52 #include "trackdb-int.h"
60 #define RESCAN "disorder-rescan"
61 #define DEADLOCK "disorder-deadlock"
63 static const char *getpart(const char *track,
68 static int trackdb_alltags_tid(DB_TXN *tid, char ***taglistp);
69 static char **trackdb_new_tid(int *ntracksp,
72 static int trackdb_expire_noticed_tid(time_t earliest, DB_TXN *tid);
74 const struct cache_type cache_files_type = { 86400 };
75 unsigned long cache_files_hits, cache_files_misses;
77 /* setup and teardown ********************************************************/
79 static const char *home; /* home had better not change */
80 DB_ENV *trackdb_env; /* db environment */
82 /** @brief The tracks database
83 * - Keys are UTF-8(NFC(unicode(path name)))
84 * - Values are encoded key-value pairs
85 * - Data is reconstructable data about tracks that currently exist
89 /** @brief The preferences database
91 * - Keys are UTF-8(NFC(unicode(path name)))
92 * - Values are encoded key-value pairs
93 * - Data is user data about tracks (that might not exist any more)
94 * and cannot be reconstructed
98 /** @brief The search database
100 * - Keys are UTF-8(NFKC(casefold(search term)))
101 * - Values are UTF-8(NFC(unicode(path name)))
102 * - There can be more than one value per key
103 * - Presence of key,value means that path matches the search terms
104 * - Only tracks fond in @ref tracks_tracksdb are represented here
105 * - This database can be reconstructed, it contains no user data
107 DB *trackdb_searchdb;
109 /** @brief The tags database
111 * - Keys are UTF-8(NFKC(casefold(tag)))
112 * - Values are UTF-8(NFC(unicode(path name)))
113 * - There can be more than one value per key
114 * - Presence of key,value means that path matches the tag
115 * - This is always in sync with the tags preference
116 * - This database can be reconstructed, it contains no user data
118 DB *trackdb_tagsdb; /* the tags database */
120 /** @brief The global preferences database
121 * - Keys are UTF-8(NFC(preference))
122 * - Values are global preference values
123 * - Data is user data and cannot be reconstructed
125 DB *trackdb_globaldb; /* global preferences */
127 /** @brief The noticed database
128 * - Keys are 64-bit big-endian timestamps
129 * - Values are UTF-8(NFC(unicode(path name)))
130 * - There can be more than one value per key
131 * - Presence of key,value means that path was added at the given time
132 * - Data cannot be reconstructed (but isn't THAT important)
134 DB *trackdb_noticeddb; /* when track noticed */
135 static pid_t db_deadlock_pid = -1; /* deadlock manager PID */
136 static pid_t rescan_pid = -1; /* rescanner PID */
137 static int initialized, opened; /* state */
139 /* tracks matched by required_tags */
140 static char **reqtracks;
141 static size_t nreqtracks;
143 /* comparison function for keys */
144 static int compare(DB attribute((unused)) *db_,
145 const DBT *a, const DBT *b) {
146 return compare_path_raw(a->data, a->size, b->data, b->size);
149 /** @brief Open database environment
150 * @param flags Flags word
152 * Flags should be one of:
153 * - @ref TRACKDB_NO_RECOVER
154 * - @ref TRACKDB_NORMAL_RECOVER
155 * - @ref TRACKDB_FATAL_RECOVER
157 void trackdb_init(int flags) {
159 const int recover = flags & TRACKDB_RECOVER_MASK;
160 static int recover_type[] = { 0, DB_RECOVER, DB_RECOVER_FATAL };
163 assert(initialized == 0);
166 if(strcmp(home, config->home))
167 fatal(0, "cannot change db home without server restart");
171 /* create environment */
172 if((err = db_env_create(&trackdb_env, 0))) fatal(0, "db_env_create: %s",
174 if((err = trackdb_env->set_alloc(trackdb_env,
175 xmalloc_noptr, xrealloc_noptr, xfree)))
176 fatal(0, "trackdb_env->set_alloc: %s", db_strerror(err));
177 if((err = trackdb_env->set_lk_max_locks(trackdb_env, 10000)))
178 fatal(0, "trackdb_env->set_lk_max_locks: %s", db_strerror(err));
179 if((err = trackdb_env->set_lk_max_objects(trackdb_env, 10000)))
180 fatal(0, "trackdb_env->set_lk_max_objects: %s", db_strerror(err));
181 if((err = trackdb_env->open(trackdb_env, config->home,
187 |recover_type[recover],
189 fatal(0, "trackdb_env->open %s: %s", config->home, db_strerror(err));
190 trackdb_env->set_errpfx(trackdb_env, "DB");
191 trackdb_env->set_errfile(trackdb_env, stderr);
192 trackdb_env->set_verbose(trackdb_env, DB_VERB_DEADLOCK, 1);
193 trackdb_env->set_verbose(trackdb_env, DB_VERB_RECOVERY, 1);
194 trackdb_env->set_verbose(trackdb_env, DB_VERB_REPLICATION, 1);
195 D(("initialized database environment"));
198 /* called when deadlock manager terminates */
199 static int reap_db_deadlock(ev_source attribute((unused)) *ev,
200 pid_t attribute((unused)) pid,
202 const struct rusage attribute((unused)) *rusage,
203 void attribute((unused)) *u) {
204 db_deadlock_pid = -1;
206 fatal(0, "deadlock manager unexpectedly terminated: %s",
209 D(("deadlock manager terminated: %s", wstat(status)));
213 static pid_t subprogram(ev_source *ev, const char *prog,
217 /* If we're in the background then trap subprocess stdout/stderr */
218 if(!(pid = xfork())) {
221 ev_signal_atfork(ev);
222 signal(SIGPIPE, SIG_DFL);
227 /* If we were negatively niced, undo it. We don't bother checking for
228 * error, it's not that important. */
229 setpriority(PRIO_PROCESS, 0, 0);
230 execlp(prog, prog, "--config", configfile,
231 debugging ? "--debug" : "--no-debug",
232 log_default == &log_syslog ? "--syslog" : "--no-syslog",
234 fatal(errno, "error invoking %s", prog);
239 /* start deadlock manager */
240 void trackdb_master(ev_source *ev) {
241 assert(db_deadlock_pid == -1);
242 db_deadlock_pid = subprogram(ev, DEADLOCK, -1);
243 ev_child(ev, db_deadlock_pid, 0, reap_db_deadlock, 0);
244 D(("started deadlock manager"));
247 /* close environment */
248 void trackdb_deinit(void) {
252 assert(initialized == 1);
255 /* close the environment */
256 if((err = trackdb_env->close(trackdb_env, 0)))
257 fatal(0, "trackdb_env->close: %s", db_strerror(err));
259 if(rescan_pid != -1 && kill(rescan_pid, SIGTERM) < 0)
260 fatal(errno, "error killing rescanner");
262 /* terminate the deadlock manager */
263 if(db_deadlock_pid != -1 && kill(db_deadlock_pid, SIGTERM) < 0)
264 fatal(errno, "error killing deadlock manager");
265 db_deadlock_pid = -1;
267 D(("deinitialized database environment"));
270 /* open a specific database */
271 static DB *open_db(const char *path,
279 D(("open %s", path));
280 path = config_get_file(path);
281 if((err = db_create(&db, trackdb_env, 0)))
282 fatal(0, "db_create %s: %s", path, db_strerror(err));
284 if((err = db->set_flags(db, dbflags)))
285 fatal(0, "db->set_flags %s: %s", path, db_strerror(err));
286 if(dbtype == DB_BTREE)
287 if((err = db->set_bt_compare(db, compare)))
288 fatal(0, "db->set_bt_compare %s: %s", path, db_strerror(err));
289 if((err = db->open(db, 0, path, 0, dbtype,
290 openflags | DB_AUTO_COMMIT, mode))) {
291 if((openflags & DB_CREATE) || errno != ENOENT)
292 fatal(0, "db->open %s: %s", path, db_strerror(err));
299 /** @brief Open track databases
300 * @param Flags flags word
302 * @p flags should be one of:
303 * - @p TRACKDB_NO_UPGRADE, if no upgrade should be attempted
304 * - @p TRACKDB_CAN_UPGRADE, if an upgrade may be attempted
305 * - @p TRACKDB_OPEN_FOR_UPGRADE, if this is disorder-dbupgrade
307 void trackdb_open(int flags) {
314 /* check the database version first */
315 trackdb_globaldb = open_db("global.db", 0, DB_HASH, 0, 0666);
316 if(trackdb_globaldb) {
317 /* This is an existing database */
321 s = trackdb_get_global("_dbversion");
322 /* Close the database again, we'll open it property below */
323 if((err = trackdb_globaldb->close(trackdb_globaldb, 0)))
324 fatal(0, "error closing global.db: %s", db_strerror(err));
325 trackdb_globaldb = 0;
326 /* Convert version string to an integer */
327 oldversion = s ? atol(s) : 1;
328 if(oldversion > config->dbversion) {
329 /* Database is from the future; we never allow this. */
330 fatal(0, "this version of DisOrder is too old for database version %ld",
333 if(oldversion < config->dbversion) {
334 /* Database version is out of date */
335 switch(flags & TRACKDB_UPGRADE_MASK) {
336 case TRACKDB_NO_UPGRADE:
337 /* This database needs upgrading but this is not permitted */
338 fatal(0, "database needs upgrading from %ld to %ld",
339 oldversion, config->dbversion);
340 case TRACKDB_CAN_UPGRADE:
341 /* This database needs upgrading */
342 info("invoking disorder-dbupgrade to upgrade from %ld to %ld",
343 oldversion, config->dbversion);
344 pid = subprogram(0, "disorder-dbupgrade", -1);
345 while(waitpid(pid, &err, 0) == -1 && errno == EINTR)
348 fatal(0, "disorder-dbupgrade %s", wstat(err));
349 info("disorder-dbupgrade succeeded");
351 case TRACKDB_OPEN_FOR_UPGRADE:
357 if(oldversion == config->dbversion && (flags & TRACKDB_OPEN_FOR_UPGRADE)) {
358 /* This doesn't make any sense */
359 fatal(0, "database is already at current version");
363 if(flags & TRACKDB_OPEN_FOR_UPGRADE) {
364 /* Cannot upgrade a new database */
365 fatal(0, "cannot upgrade a database that does not exist");
367 /* This is a brand new database */
370 /* open the databases */
371 trackdb_tracksdb = open_db("tracks.db",
372 DB_RECNUM, DB_BTREE, DB_CREATE, 0666);
373 trackdb_searchdb = open_db("search.db",
374 DB_DUP|DB_DUPSORT, DB_HASH, DB_CREATE, 0666);
375 trackdb_tagsdb = open_db("tags.db",
376 DB_DUP|DB_DUPSORT, DB_HASH, DB_CREATE, 0666);
377 trackdb_prefsdb = open_db("prefs.db", 0, DB_HASH, DB_CREATE, 0666);
378 trackdb_globaldb = open_db("global.db", 0, DB_HASH, DB_CREATE, 0666);
379 trackdb_noticeddb = open_db("noticed.db",
380 DB_DUPSORT, DB_BTREE, DB_CREATE, 0666);
382 /* Stash the database version */
385 assert(!(flags & TRACKDB_OPEN_FOR_UPGRADE));
386 snprintf(buf, sizeof buf, "%ld", config->dbversion);
387 trackdb_set_global("_dbversion", buf, 0);
389 D(("opened databases"));
392 /* close track databases */
393 void trackdb_close(void) {
399 if((err = trackdb_tracksdb->close(trackdb_tracksdb, 0)))
400 fatal(0, "error closing tracks.db: %s", db_strerror(err));
401 if((err = trackdb_searchdb->close(trackdb_searchdb, 0)))
402 fatal(0, "error closing search.db: %s", db_strerror(err));
403 if((err = trackdb_tagsdb->close(trackdb_tagsdb, 0)))
404 fatal(0, "error closing tags.db: %s", db_strerror(err));
405 if((err = trackdb_prefsdb->close(trackdb_prefsdb, 0)))
406 fatal(0, "error closing prefs.db: %s", db_strerror(err));
407 if((err = trackdb_globaldb->close(trackdb_globaldb, 0)))
408 fatal(0, "error closing global.db: %s", db_strerror(err));
409 if((err = trackdb_noticeddb->close(trackdb_noticeddb, 0)))
410 fatal(0, "error closing noticed.db: %s", db_strerror(err));
411 trackdb_tracksdb = trackdb_searchdb = trackdb_prefsdb = 0;
412 trackdb_tagsdb = trackdb_globaldb = 0;
413 D(("closed databases"));
416 /* generic db routines *******************************************************/
418 /* fetch and decode a database entry. Returns 0, DB_NOTFOUND or
419 * DB_LOCK_DEADLOCK. */
420 int trackdb_getdata(DB *db,
427 switch(err = db->get(db, tid, make_key(&key, track),
428 prepare_data(&data), 0)) {
430 *kp = kvp_urldecode(data.data, data.size);
435 case DB_LOCK_DEADLOCK:
436 error(0, "error querying database: %s", db_strerror(err));
439 fatal(0, "error querying database: %s", db_strerror(err));
443 /* encode and store a database entry. Returns 0, DB_KEYEXIST or
444 * DB_LOCK_DEADLOCK. */
445 int trackdb_putdata(DB *db,
453 switch(err = db->put(db, tid, make_key(&key, track),
454 encode_data(&data, k), flags)) {
458 case DB_LOCK_DEADLOCK:
459 error(0, "error updating database: %s", db_strerror(err));
462 fatal(0, "error updating database: %s", db_strerror(err));
466 /* delete a database entry */
467 int trackdb_delkey(DB *db,
473 switch(err = db->del(db, tid, make_key(&key, track), 0)) {
477 case DB_LOCK_DEADLOCK:
478 error(0, "error updating database: %s", db_strerror(err));
481 fatal(0, "error updating database: %s", db_strerror(err));
485 /* open a database cursor */
486 DBC *trackdb_opencursor(DB *db, DB_TXN *tid) {
490 switch(err = db->cursor(db, tid, &c, 0)) {
492 default: fatal(0, "error creating cursor: %s", db_strerror(err));
497 /* close a database cursor; returns 0 or DB_LOCK_DEADLOCK */
498 int trackdb_closecursor(DBC *c) {
502 switch(err = c->c_close(c)) {
505 case DB_LOCK_DEADLOCK:
506 error(0, "error closing cursor: %s", db_strerror(err));
509 fatal(0, "error closing cursor: %s", db_strerror(err));
513 /* delete a (key,data) pair. Returns 0, DB_NOTFOUND or DB_LOCK_DEADLOCK. */
514 int trackdb_delkeydata(DB *db,
522 c = trackdb_opencursor(db, tid);
523 switch(err = c->c_get(c, make_key(&key, word),
524 make_key(&data, track), DB_GET_BOTH)) {
526 switch(err = c->c_del(c, 0)) {
532 case DB_LOCK_DEADLOCK:
533 error(0, "error updating database: %s", db_strerror(err));
536 fatal(0, "c->c_del: %s", db_strerror(err));
541 case DB_LOCK_DEADLOCK:
542 error(0, "error updating database: %s", db_strerror(err));
545 fatal(0, "c->c_get: %s", db_strerror(err));
547 if(trackdb_closecursor(c)) err = DB_LOCK_DEADLOCK;
551 /* start a transaction */
552 DB_TXN *trackdb_begin_transaction(void) {
556 if((err = trackdb_env->txn_begin(trackdb_env, 0, &tid, 0)))
557 fatal(0, "trackdb_env->txn_begin: %s", db_strerror(err));
561 /* abort transaction */
562 void trackdb_abort_transaction(DB_TXN *tid) {
566 if((err = tid->abort(tid)))
567 fatal(0, "tid->abort: %s", db_strerror(err));
570 /* commit transaction */
571 void trackdb_commit_transaction(DB_TXN *tid) {
574 if((err = tid->commit(tid, 0)))
575 fatal(0, "tid->commit: %s", db_strerror(err));
578 /* search/tags shared code ***************************************************/
580 /* comparison function used by dedupe() */
581 static int wordcmp(const void *a, const void *b) {
582 return strcmp(*(const char **)a, *(const char **)b);
585 /* sort and de-dupe VEC */
586 static char **dedupe(char **vec, int nvec) {
589 qsort(vec, nvec, sizeof (char *), wordcmp);
593 for(n = 1; n < nvec; ++n)
594 if(strcmp(vec[n], vec[m - 1]))
601 /* update a key/track database. Returns 0 or DB_DEADLOCK. */
602 static int register_word(DB *db, const char *what,
603 const char *track, const char *word,
608 switch(err = db->put(db, tid, make_key(&key, word),
609 make_key(&data, track), DB_NODUPDATA)) {
613 case DB_LOCK_DEADLOCK:
614 error(0, "error updating %s.db: %s", what, db_strerror(err));
617 fatal(0, "error updating %s.db: %s", what, db_strerror(err));
621 /* search primitives *********************************************************/
623 /* return true iff NAME is a trackname_display_ pref */
624 static int is_display_pref(const char *name) {
625 static const char prefix[] = "trackname_display_";
626 return !strncmp(name, prefix, (sizeof prefix) - 1);
629 /** @brief Word_Break property tailor that treats underscores as spaces */
630 static int tailor_underscore_Word_Break_Other(uint32_t c) {
634 case 0x005F: /* LOW LINE (SPACING UNDERSCORE) */
635 return unicode_Word_Break_Other;
639 /** @brief Normalize and split a string using a given tailoring */
640 static void word_split(struct vector *v,
642 unicode_property_tailor *pt) {
644 uint32_t *t32, **w32;
646 /* Convert to UTF-32 */
647 if(!(t32 = utf8_to_utf32(s, strlen(s), &nt32)))
649 /* Erase case distinctions */
650 if(!(t32 = utf32_casefold_compat(t32, nt32, &nt32)))
652 /* Split into words, treating _ as a space */
653 w32 = utf32_word_split(t32, nt32, &nw, pt);
654 /* Convert words back to UTF-8 and append to result */
655 for(i = 0; i < nw; ++i)
656 vector_append(v, utf32_to_utf8(w32[i], utf32_len(w32[i]), 0));
659 /* compute the words of a track name */
660 static char **track_to_words(const char *track,
661 const struct kvp *p) {
663 const char *rootless = track_rootless(track);
666 rootless = track; /* bodge */
668 rootless = strip_extension(rootless);
669 word_split(&v, strip_extension(rootless), tailor_underscore_Word_Break_Other);
670 for(; p; p = p->next)
671 if(is_display_pref(p->name))
672 word_split(&v, p->value, 0);
673 vector_terminate(&v);
674 return dedupe(v.vec, v.nvec);
677 /* return nonzero iff WORD is a stopword */
678 static int stopword(const char *word) {
681 for(n = 0; n < config->stopword.n
682 && strcmp(word, config->stopword.s[n]); ++n)
684 return n < config->stopword.n;
687 /* record that WORD appears in TRACK. Returns 0 or DB_LOCK_DEADLOCK. */
688 static int register_search_word(const char *track, const char *word,
690 if(stopword(word)) return 0;
691 return register_word(trackdb_searchdb, "search", track, word, tid);
694 /* Tags **********************************************************************/
696 /* Return nonzero if C is a valid tag character */
697 static int tagchar(int c) {
706 /* Parse and de-dupe a tag list. If S=0 then assumes "". */
707 static char **parsetags(const char *s) {
713 /* skip initial separators */
714 while(*s && (!tagchar(*s) || *s == ' '))
717 /* find the extent of the tag */
719 while(*s && tagchar(*s))
721 /* strip trailing spaces */
722 while(s > t && s[-1] == ' ')
724 vector_append(&v, xstrndup(t, s - t));
725 /* skip intermediate and trailing separators */
726 while(*s && (!tagchar(*s) || *s == ' '))
730 vector_terminate(&v);
731 return dedupe(v.vec, v.nvec);
734 /* Record that TRACK has TAG. Returns 0 or DB_LOCK_DEADLOCK. */
735 static int register_tag(const char *track, const char *tag, DB_TXN *tid) {
736 return register_word(trackdb_tagsdb, "tags", track, tag, tid);
739 /* aliases *******************************************************************/
741 /* compute the alias and store at aliasp. Returns 0 or DB_LOCK_DEADLOCK. If
742 * there is no alias sets *aliasp to 0. */
743 static int compute_alias(char **aliasp,
748 const char *s = config->alias, *t, *expansion, *part;
749 int c, used_db = 0, slash_prefix, err;
751 const char *const root = find_track_root(track);
754 /* Bodge for tracks with no root */
759 dynstr_append_string(&d, root);
760 while((c = (unsigned char)*s++)) {
762 dynstr_append(&d, c);
765 if((slash_prefix = (*s == '/')))
768 assert(t != 0); /* validated at startup */
769 part = xstrndup(s, t - s);
770 expansion = getpart(track, "display", part, p, &used_db);
772 if(slash_prefix) dynstr_append(&d, '/');
773 dynstr_append_string(&d, expansion);
775 s = t + 1; /* skip {part} */
777 /* only admit to the alias if we used the db... */
782 dynstr_terminate(&d);
783 /* ...and the answer differs from the original... */
784 if(!strcmp(track, d.vec)) {
788 /* ...and there isn't already a different track with that name (including as
790 switch(err = trackdb_getdata(trackdb_tracksdb, d.vec, &at, tid)) {
792 if((s = kvp_get(at, "_alias_for"))
793 && !strcmp(s, track)) {
805 /* get track and prefs data (if tp/pp not null pointers). Returns 0 on
806 * success, DB_NOTFOUND if the track does not exist or DB_LOCK_DEADLOCK.
807 * Always sets the return values, even if only to null pointers. */
808 static int gettrackdata(const char *track,
811 const char **actualp,
813 #define GTD_NOALIAS 0x0001
816 const char *actual = track;
817 struct kvp *t = 0, *p = 0;
819 if((err = trackdb_getdata(trackdb_tracksdb, track, &t, tid))) goto done;
820 if((actual = kvp_get(t, "_alias_for"))) {
821 if(flags & GTD_NOALIAS) {
822 error(0, "alias passed to gettrackdata where real path required");
825 if((err = trackdb_getdata(trackdb_tracksdb, actual, &t, tid))) goto done;
830 if((err = trackdb_getdata(trackdb_prefsdb, actual, &p, tid)) == DB_LOCK_DEADLOCK)
835 if(actualp) *actualp = actual;
841 /* trackdb_notice() **********************************************************/
843 /** @brief notice a possibly new track
844 * @return @c DB_NOTFOUND if new, 0 if already known
846 int trackdb_notice(const char *track,
852 tid = trackdb_begin_transaction();
853 err = trackdb_notice_tid(track, path, tid);
854 if((err == DB_LOCK_DEADLOCK)) goto fail;
857 trackdb_abort_transaction(tid);
859 trackdb_commit_transaction(tid);
863 /** @brief notice a possibly new track
864 * @param track NFC UTF-8 track name
865 * @param path Raw path name
866 * @param tid Transaction ID
867 * @return @c DB_NOTFOUND if new, 0 if already known, @c DB_LOCK_DEADLOCK also
869 int trackdb_notice_tid(const char *track,
873 struct kvp *t, *a, *p;
877 /* notice whether the tracks.db entry changes */
879 /* get any existing tracks entry */
880 if((err = gettrackdata(track, &t, &p, 0, 0, tid)) == DB_LOCK_DEADLOCK)
882 ret = err; /* 0 or DB_NOTFOUND */
883 /* this is a real track */
884 t_changed += kvp_set(&t, "_alias_for", 0);
885 t_changed += kvp_set(&t, "_path", path);
886 /* if we have an alias record it in the database */
887 if((err = compute_alias(&alias, track, p, tid))) return err;
889 /* won't overwrite someone else's alias as compute_alias() checks */
890 D(("%s: alias %s", track, alias));
892 kvp_set(&a, "_alias_for", track);
893 if((err = trackdb_putdata(trackdb_tracksdb, alias, a, tid, 0))) return err;
895 /* update search.db */
896 w = track_to_words(track, p);
897 for(n = 0; w[n]; ++n)
898 if((err = register_search_word(track, w[n], tid)))
901 w = parsetags(kvp_get(p, "tags"));
902 for(n = 0; w[n]; ++n)
903 if((err = register_tag(track, w[n], tid)))
906 /* only store the tracks.db entry if it has changed */
907 if(t_changed && (err = trackdb_putdata(trackdb_tracksdb, track, t, tid, 0)))
909 if(ret == DB_NOTFOUND) {
910 uint32_t timestamp[2];
915 timestamp[0] = htonl((uint64_t)now >> 32);
916 timestamp[1] = htonl((uint32_t)now);
917 memset(&key, 0, sizeof key);
918 key.data = timestamp;
919 key.size = sizeof timestamp;
920 switch(err = trackdb_noticeddb->put(trackdb_noticeddb, tid, &key,
921 make_key(&data, track), 0)) {
923 case DB_LOCK_DEADLOCK: return err;
924 default: fatal(0, "error updating noticed.db: %s", db_strerror(err));
930 /* trackdb_obsolete() ********************************************************/
932 /* obsolete a track */
933 int trackdb_obsolete(const char *track, DB_TXN *tid) {
938 if((err = gettrackdata(track, 0, &p, 0,
939 GTD_NOALIAS, tid)) == DB_LOCK_DEADLOCK)
941 else if(err == DB_NOTFOUND) return 0;
942 /* compute the alias, if any, and delete it */
943 if(compute_alias(&alias, track, p, tid)) return err;
945 /* if the alias points to some other track then compute_alias won't
947 if(trackdb_delkey(trackdb_tracksdb, alias, tid))
950 /* update search.db */
951 w = track_to_words(track, p);
952 for(n = 0; w[n]; ++n)
953 if(trackdb_delkeydata(trackdb_searchdb,
954 w[n], track, tid) == DB_LOCK_DEADLOCK)
957 w = parsetags(kvp_get(p, "tags"));
958 for(n = 0; w[n]; ++n)
959 if(trackdb_delkeydata(trackdb_tagsdb,
960 w[n], track, tid) == DB_LOCK_DEADLOCK)
963 /* update tracks.db */
964 if(trackdb_delkey(trackdb_tracksdb, track, tid) == DB_LOCK_DEADLOCK)
966 /* We don't delete the prefs, so they survive temporary outages of the
967 * (possibly virtual) track filesystem */
971 /* trackdb_stats() ***********************************************************/
973 #define H(name) { #name, offsetof(DB_HASH_STAT, name) }
974 #define B(name) { #name, offsetof(DB_BTREE_STAT, name) }
976 static const struct statinfo {
979 } statinfo_hash[] = {
995 }, statinfo_btree[] = {
1016 /* look up stats for DB */
1017 static int get_stats(struct vector *v,
1019 const struct statinfo *si,
1028 switch(err = database->stat(database, tid, &sp, 0)) {
1031 case DB_LOCK_DEADLOCK:
1032 error(0, "error querying database: %s", db_strerror(err));
1035 fatal(0, "error querying database: %s", db_strerror(err));
1037 for(n = 0; n < nsi; ++n) {
1038 byte_xasprintf(&str, "%s=%"PRIuMAX, si[n].name,
1039 (uintmax_t)*(u_int32_t *)((char *)sp + si[n].offset));
1040 vector_append(v, str);
1046 struct search_entry {
1051 /* find the top COUNT words in the search database */
1052 static int search_league(struct vector *v, int count, DB_TXN *tid) {
1053 struct search_entry *se;
1056 int err, n = 0, nse = 0, i;
1061 cursor = trackdb_opencursor(trackdb_searchdb, tid);
1062 se = xmalloc(count * sizeof *se);
1063 while(!(err = cursor->c_get(cursor, prepare_data(&k), prepare_data(&d),
1065 if(word && wl == k.size && !strncmp(word, k.data, wl))
1068 #define FINALIZE() do { \
1069 if(word && (nse < count || n > se[nse - 1].n)) { \
1074 while(i > 0 && n > se[i - 1].n) \
1076 memmove(&se[i + 1], &se[i], (nse - i) * sizeof *se); \
1077 se[i].word = word; \
1082 word = xstrndup(k.data, wl = k.size);
1090 case DB_LOCK_DEADLOCK:
1091 error(0, "error querying search database: %s", db_strerror(err));
1094 fatal(0, "error querying search database: %s", db_strerror(err));
1096 if(trackdb_closecursor(cursor)) err = DB_LOCK_DEADLOCK;
1099 byte_xasprintf(&str, "Top %d search words:", nse);
1100 vector_append(v, str);
1101 for(i = 0; i < nse; ++i) {
1102 byte_xasprintf(&str, "%4d: %5d %s", i + 1, se[i].n, se[i].word);
1103 vector_append(v, str);
1108 #define SI(what) statinfo_##what, \
1109 sizeof statinfo_##what / sizeof (struct statinfo)
1111 /* return a list of database stats */
1112 char **trackdb_stats(int *nstatsp) {
1118 tid = trackdb_begin_transaction();
1120 vector_append(&v, (char *)"Tracks database stats:");
1121 if(get_stats(&v, trackdb_tracksdb, SI(btree), tid)) goto fail;
1122 vector_append(&v, (char *)"");
1123 vector_append(&v, (char *)"Search database stats:");
1124 if(get_stats(&v, trackdb_searchdb, SI(hash), tid)) goto fail;
1125 vector_append(&v, (char *)"");
1126 vector_append(&v, (char *)"Prefs database stats:");
1127 if(get_stats(&v, trackdb_prefsdb, SI(hash), tid)) goto fail;
1128 vector_append(&v, (char *)"");
1129 if(search_league(&v, 10, tid)) goto fail;
1130 vector_terminate(&v);
1133 trackdb_abort_transaction(tid);
1135 trackdb_commit_transaction(tid);
1136 if(nstatsp) *nstatsp = v.nvec;
1140 struct stats_details {
1141 void (*done)(char *data, void *u);
1143 int exited; /* subprocess exited */
1144 int closed; /* pipe close */
1145 int wstat; /* wait status from subprocess */
1146 struct dynstr data[1]; /* data read from pipe */
1149 static void stats_complete(struct stats_details *d) {
1152 if(!(d->exited && d->closed))
1154 byte_xasprintf(&s, "\n"
1156 "track lookup cache hits: %lu\n"
1157 "track lookup cache misses: %lu\n",
1159 cache_files_misses);
1160 dynstr_append_string(d->data, s);
1161 dynstr_terminate(d->data);
1162 d->done(d->data->vec, d->u);
1165 static int stats_finished(ev_source attribute((unused)) *ev,
1166 pid_t attribute((unused)) pid,
1168 const struct rusage attribute((unused)) *rusage,
1170 struct stats_details *const d = u;
1174 error(0, "disorder-stats %s", wstat(status));
1179 static int stats_read(ev_source attribute((unused)) *ev,
1185 struct stats_details *const d = u;
1187 dynstr_append_bytes(d->data, ptr, bytes);
1188 ev_reader_consume(reader, bytes);
1195 static int stats_error(ev_source attribute((unused)) *ev,
1198 struct stats_details *const d = u;
1200 error(errno_value, "error reading from pipe to disorder-stats");
1206 void trackdb_stats_subprocess(ev_source *ev,
1207 void (*done)(char *data, void *u),
1211 struct stats_details *d = xmalloc(sizeof *d);
1213 dynstr_init(d->data);
1217 pid = subprogram(ev, "disorder-stats", p[1]);
1219 ev_child(ev, pid, 0, stats_finished, d);
1220 ev_reader_new(ev, p[0], stats_read, stats_error, d, "disorder-stats reader");
1223 /* set a pref (remove if value=0) */
1224 int trackdb_set(const char *track,
1226 const char *value) {
1227 struct kvp *t, *p, *a;
1230 char *oldalias, *newalias, **oldtags = 0, **newtags;
1233 /* TODO: if value matches default then set value=0 */
1237 tid = trackdb_begin_transaction();
1238 if((err = gettrackdata(track, &t, &p, 0,
1239 0, tid)) == DB_LOCK_DEADLOCK)
1241 if(err == DB_NOTFOUND) break;
1242 if(name[0] == '_') {
1243 if(kvp_set(&t, name, value))
1244 if(trackdb_putdata(trackdb_tracksdb, track, t, tid, 0))
1247 /* get the old alias name */
1248 if(compute_alias(&oldalias, track, p, tid)) goto fail;
1249 /* get the old tags */
1250 if(!strcmp(name, "tags"))
1251 oldtags = parsetags(kvp_get(p, "tags"));
1253 if(kvp_set(&p, name, value))
1254 if(trackdb_putdata(trackdb_prefsdb, track, p, tid, 0))
1256 /* compute the new alias name */
1257 if((err = compute_alias(&newalias, track, p, tid))) goto fail;
1258 /* check whether alias has changed */
1259 if(!(oldalias == newalias
1260 || (oldalias && newalias && !strcmp(oldalias, newalias)))) {
1261 /* adjust alias records to fit change */
1263 && trackdb_delkey(trackdb_tracksdb, oldalias, tid)) goto fail;
1266 kvp_set(&a, "_alias_for", track);
1267 if(trackdb_putdata(trackdb_tracksdb, newalias, a, tid, 0)) goto fail;
1270 /* check whether tags have changed */
1271 if(!strcmp(name, "tags")) {
1272 newtags = parsetags(value);
1273 while(*oldtags || *newtags) {
1274 if(*oldtags && *newtags) {
1275 cmp = strcmp(*oldtags, *newtags);
1277 /* keeping this tag */
1281 /* old tag fits into a gap in the new list, so delete old */
1284 /* new tag fits into a gap in the old list, so insert new */
1286 } else if(*oldtags) {
1287 /* we've run out of new tags, so remaining old ones are to be
1290 if(trackdb_delkeydata(trackdb_tagsdb,
1291 *oldtags, track, tid) == DB_LOCK_DEADLOCK)
1295 /* we've run out of old tags, so remainig new ones are to be
1298 if(register_tag(track, *newtags, tid)) goto fail;
1308 trackdb_abort_transaction(tid);
1310 trackdb_commit_transaction(tid);
1311 return err == 0 ? 0 : -1;
1315 const char *trackdb_get(const char *track,
1317 return kvp_get(trackdb_get_all(track), name);
1320 /* get all prefs as a 0-terminated array */
1321 struct kvp *trackdb_get_all(const char *track) {
1322 struct kvp *t, *p, **pp;
1326 tid = trackdb_begin_transaction();
1327 if(gettrackdata(track, &t, &p, 0, 0, tid) == DB_LOCK_DEADLOCK)
1331 trackdb_abort_transaction(tid);
1333 trackdb_commit_transaction(tid);
1334 for(pp = &p; *pp; pp = &(*pp)->next)
1341 const char *trackdb_resolve(const char *track) {
1346 tid = trackdb_begin_transaction();
1347 if(gettrackdata(track, 0, 0, &actual, 0, tid) == DB_LOCK_DEADLOCK)
1351 trackdb_abort_transaction(tid);
1353 trackdb_commit_transaction(tid);
1357 int trackdb_isalias(const char *track) {
1358 const char *actual = trackdb_resolve(track);
1360 return strcmp(actual, track);
1363 /* test whether a track exists (perhaps an alias) */
1364 int trackdb_exists(const char *track) {
1369 tid = trackdb_begin_transaction();
1370 /* unusually, here we want the return value */
1371 if((err = gettrackdata(track, 0, 0, 0, 0, tid)) == DB_LOCK_DEADLOCK)
1375 trackdb_abort_transaction(tid);
1377 trackdb_commit_transaction(tid);
1381 /* return the list of tags */
1382 char **trackdb_alltags(void) {
1388 tid = trackdb_begin_transaction();
1389 err = trackdb_alltags_tid(tid, &taglist);
1391 trackdb_abort_transaction(tid);
1393 trackdb_commit_transaction(tid);
1397 static int trackdb_alltags_tid(DB_TXN *tid, char ***taglistp) {
1404 c = trackdb_opencursor(trackdb_tagsdb, tid);
1405 memset(&k, 0, sizeof k);
1406 while(!(err = c->c_get(c, &k, prepare_data(&d), DB_NEXT_NODUP)))
1407 vector_append(&v, xstrndup(k.data, k.size));
1411 case DB_LOCK_DEADLOCK:
1414 fatal(0, "c->c_get: %s", db_strerror(err));
1416 if((err = trackdb_closecursor(c))) return err;
1417 vector_terminate(&v);
1422 /* return 1 iff sorted tag lists A and B have at least one member in common */
1423 static int tag_intersection(char **a, char **b) {
1426 /* Same sort of logic as trackdb_set() above */
1428 if(!(cmp = strcmp(*a, *b))) return 1;
1429 else if(cmp < 0) ++a;
1435 /* Check whether a track is suitable for random play. Returns 0 if it is,
1436 * DB_NOTFOUND if it is not or DB_LOCK_DEADLOCK if the database gave us
1438 static int check_suitable(const char *track,
1440 char **required_tags,
1441 char **prohibited_tags) {
1445 const char *pick_at_random, *played_time;
1447 /* don't pick tracks that aren't in any surviving collection (for instance
1448 * you've edited the config but the rescan hasn't done its job yet) */
1449 if(!find_track_root(track)) {
1450 info("found track not in any collection: %s", track);
1453 /* don't pick aliases - only pick the canonical form */
1454 if(gettrackdata(track, &t, &p, 0, 0, tid) == DB_LOCK_DEADLOCK)
1455 return DB_LOCK_DEADLOCK;
1456 if(kvp_get(t, "_alias_for"))
1458 /* check that random play is not suppressed for this track */
1459 if((pick_at_random = kvp_get(p, "pick_at_random"))
1460 && !strcmp(pick_at_random, "0"))
1462 /* don't pick a track that's been played in the last 8 hours */
1463 if((played_time = kvp_get(p, "played_time"))) {
1464 last = atoll(played_time);
1466 if(now < last + 8 * 3600) /* TODO configurable */
1469 track_tags = parsetags(kvp_get(p, "tags"));
1470 /* check that no prohibited tag is present for this track */
1471 if(prohibited_tags && tag_intersection(track_tags, prohibited_tags))
1473 /* check that at least one required tags is present for this track */
1474 if(*required_tags && !tag_intersection(track_tags, required_tags))
1479 /* attempt to pick a random non-alias track */
1480 const char *trackdb_random(int tries) {
1485 const char *track, *candidate;
1488 char **required_tags, **prohibited_tags, **tp;
1493 tid = trackdb_begin_transaction();
1494 if((err = trackdb_get_global_tid("required-tags", tid, &tags)))
1496 required_tags = parsetags(tags);
1497 if((err = trackdb_get_global_tid("prohibited-tags", tid, &tags)))
1499 prohibited_tags = parsetags(tags);
1501 if(*required_tags) {
1502 /* Bung all the suitable tracks into a hash and convert to a list of keys
1503 * (to eliminate duplicates). We cache this list since it is possible
1504 * that it will be very large. */
1507 for(tp = required_tags; *tp; ++tp) {
1508 c = trackdb_opencursor(trackdb_tagsdb, tid);
1509 memset(&key, 0, sizeof key);
1511 key.size = strlen(*tp);
1513 err = c->c_get(c, &key, prepare_data(&data), DB_SET);
1515 hash_add(h, xstrndup(data.data, data.size), 0,
1516 HASH_INSERT_OR_REPLACE);
1518 err = c->c_get(c, &key, prepare_data(&data), DB_NEXT_DUP);
1524 case DB_LOCK_DEADLOCK:
1527 fatal(0, "error querying tags.db: %s", db_strerror(err));
1529 trackdb_closecursor(c);
1532 error(0, "required tag %s does not match any tracks", *tp);
1534 nreqtracks = hash_count(h);
1535 reqtracks = hash_keys(h);
1537 while(nreqtracks && !track && tries-- > 0) {
1538 r = (rand() * (double)nreqtracks / (RAND_MAX + 1.0));
1539 candidate = reqtracks[r];
1540 switch(check_suitable(candidate, tid,
1541 required_tags, prohibited_tags)) {
1547 case DB_LOCK_DEADLOCK:
1552 /* No required tags. We pick random record numbers in the database
1554 switch(err = trackdb_tracksdb->stat(trackdb_tracksdb, tid, &sp, 0)) {
1557 case DB_LOCK_DEADLOCK:
1558 error(0, "error querying tracks.db: %s", db_strerror(err));
1561 fatal(0, "error querying tracks.db: %s", db_strerror(err));
1564 error(0, "cannot pick tracks at random from an empty database");
1565 while(sp->bt_nkeys && !track && tries-- > 0) {
1566 /* record numbers count from 1 upwards */
1567 r = 1 + (rand() * (double)sp->bt_nkeys / (RAND_MAX + 1.0));
1568 memset(&key, sizeof key, 0);
1569 key.flags = DB_DBT_MALLOC;
1570 key.size = sizeof r;
1572 switch(err = trackdb_tracksdb->get(trackdb_tracksdb, tid, &key, prepare_data(&data),
1576 case DB_LOCK_DEADLOCK:
1577 error(0, "error querying tracks.db: %s", db_strerror(err));
1580 fatal(0, "error querying tracks.db: %s", db_strerror(err));
1582 candidate = xstrndup(key.data, key.size);
1583 switch(check_suitable(candidate, tid,
1584 required_tags, prohibited_tags)) {
1590 case DB_LOCK_DEADLOCK:
1597 trackdb_closecursor(c);
1599 trackdb_abort_transaction(tid);
1601 trackdb_commit_transaction(tid);
1603 error(0, "could not pick a random track");
1607 /* get a track name given the prefs. Set *used_db to 1 if we got the answer
1608 * from the prefs. */
1609 static const char *getpart(const char *track,
1610 const char *context,
1612 const struct kvp *p,
1617 byte_xasprintf(&pref, "trackname_%s_%s", context, part);
1618 if((result = kvp_get(p, pref)))
1621 result = trackname_part(track, context, part);
1622 assert(result != 0);
1626 /* get a track name part, like trackname_part(), but taking the database into
1628 const char *trackdb_getpart(const char *track,
1629 const char *context,
1637 /* construct the full pref */
1638 byte_xasprintf(&pref, "trackname_%s_%s", context, part);
1640 tid = trackdb_begin_transaction();
1641 if((err = gettrackdata(track, 0, &p, &actual, 0, tid)) == DB_LOCK_DEADLOCK)
1645 trackdb_abort_transaction(tid);
1647 trackdb_commit_transaction(tid);
1648 return getpart(actual, context, part, p, &used_db);
1651 /* get the raw path name for @track@ (might be an alias) */
1652 const char *trackdb_rawpath(const char *track) {
1658 tid = trackdb_begin_transaction();
1659 if(gettrackdata(track, &t, 0, 0, 0, tid) == DB_LOCK_DEADLOCK)
1663 trackdb_abort_transaction(tid);
1665 trackdb_commit_transaction(tid);
1666 if(!(path = kvp_get(t, "_path"))) path = track;
1670 /* trackdb_list **************************************************************/
1672 /* this is incredibly ugly, sorry, perhaps it will be rewritten to be actually
1673 * readable at some point */
1675 /* return true if the basename of TRACK[0..TL-1], as defined by DL, matches RE.
1676 * If RE is a null pointer then it matches everything. */
1677 static int track_matches(size_t dl, const char *track, size_t tl,
1685 switch(rc = pcre_exec(re, 0, track, tl, 0, 0, ovec, 3)) {
1686 case PCRE_ERROR_NOMATCH: return 0;
1689 error(0, "pcre_exec returned %d, subject '%s'", rc, track);
1696 static int do_list(struct vector *v, const char *dir,
1697 enum trackdb_listable what, const pcre *re, DB_TXN *tid) {
1703 size_t l, last_dir_len = 0;
1704 char *last_dir = 0, *track, *alias;
1708 cursor = trackdb_opencursor(trackdb_tracksdb, tid);
1711 /* find the first key >= dir */
1712 err = cursor->c_get(cursor, &k, &d, DB_SET_RANGE);
1713 /* keep going while we're dealing with <dir/anything> */
1716 && ((char *)k.data)[dl] == '/'
1717 && !memcmp(k.data, dir, dl)) {
1718 ptr = memchr((char *)k.data + dl + 1, '/', k.size - (dl + 1));
1720 /* we have <dir/component/anything>, so <dir/component> is a directory */
1721 l = ptr - (char *)k.data;
1722 if(what & trackdb_directories)
1724 && l == last_dir_len
1725 && !memcmp(last_dir, k.data, l))) {
1726 last_dir = xstrndup(k.data, last_dir_len = l);
1727 if(track_matches(dl, k.data, l, re))
1728 vector_append(v, last_dir);
1731 /* found a plain file */
1732 if((what & trackdb_files)) {
1733 track = xstrndup(k.data, k.size);
1734 if((err = trackdb_getdata(trackdb_prefsdb,
1735 track, &p, tid)) == DB_LOCK_DEADLOCK)
1737 /* if this file has an alias in the same directory then we skip it */
1738 if((err = compute_alias(&alias, track, p, tid)))
1740 if(!(alias && !strcmp(d_dirname(alias), d_dirname(track))))
1741 if(track_matches(dl, k.data, k.size, re))
1742 vector_append(v, track);
1745 err = cursor->c_get(cursor, &k, &d, DB_NEXT);
1753 case DB_LOCK_DEADLOCK:
1754 error(0, "error querying database: %s", db_strerror(err));
1757 fatal(0, "error querying database: %s", db_strerror(err));
1760 if(trackdb_closecursor(cursor)) err = DB_LOCK_DEADLOCK;
1764 /* return the directories or files below @dir@ */
1765 char **trackdb_list(const char *dir, int *np, enum trackdb_listable what,
1773 tid = trackdb_begin_transaction();
1776 if(do_list(&v, dir, what, re, tid))
1779 for(n = 0; n < config->collection.n; ++n)
1780 if(do_list(&v, config->collection.s[n].root, what, re, tid))
1785 trackdb_abort_transaction(tid);
1787 trackdb_commit_transaction(tid);
1788 vector_terminate(&v);
1794 /* If S is tag:something, return something. Else return 0. */
1795 static const char *checktag(const char *s) {
1796 if(!strncmp(s, "tag:", 4))
1802 /* return a list of tracks containing all of the words given. If you
1803 * ask for only stopwords you get no tracks. */
1804 char **trackdb_search(char **wordlist, int nwordlist, int *ntracks) {
1805 const char **w, *best = 0, *tag;
1806 char **twords, **tags;
1807 int i, j, n, err, what;
1817 *ntracks = 0; /* for early returns */
1818 /* casefold all the words */
1819 w = xmalloc(nwordlist * sizeof (char *));
1820 for(n = 0; n < nwordlist; ++n) {
1821 w[n] = utf8_casefold_compat(wordlist[n], strlen(wordlist[n]), 0);
1822 if(checktag(w[n])) ++ntags; /* count up tags */
1824 /* find the longest non-stopword */
1825 for(n = 0; n < nwordlist; ++n)
1826 if(!stopword(w[n]) && !checktag(w[n]))
1827 if(!best || strlen(w[n]) > strlen(best))
1829 /* TODO: we should at least in principal be able to identify the word or tag
1830 * with the least matches in log time, and choose that as our primary search
1832 if(ntags && !best) {
1833 /* Only tags are listed. We limit to the first and narrow down with the
1835 best = checktag(w[0]);
1836 db = trackdb_tagsdb;
1839 /* We can limit to some word. */
1840 db = trackdb_searchdb;
1843 /* Only stopwords */
1849 tid = trackdb_begin_transaction();
1850 /* find all the tracks that have that word */
1855 cursor = trackdb_opencursor(db, tid);
1856 while(!(err = cursor->c_get(cursor, &k, &d, what))) {
1857 vector_append(&v, xstrndup(d.data, d.size));
1864 case DB_LOCK_DEADLOCK:
1865 error(0, "error querying %s database: %s", dbname, db_strerror(err));
1868 fatal(0, "error querying %s database: %s", dbname, db_strerror(err));
1870 if(trackdb_closecursor(cursor)) err = DB_LOCK_DEADLOCK;
1872 /* do a naive search over that (hopefuly fairly small) list of tracks */
1874 for(n = 0; n < v.nvec; ++n) {
1875 if((err = gettrackdata(v.vec[n], 0, &p, 0, 0, tid) == DB_LOCK_DEADLOCK))
1878 error(0, "track %s unexpected error: %s", v.vec[n], db_strerror(err));
1881 twords = track_to_words(v.vec[n], p);
1882 tags = parsetags(kvp_get(p, "tags"));
1883 for(i = 0; i < nwordlist; ++i) {
1884 if((tag = checktag(w[i]))) {
1885 /* Track must have this tag */
1886 for(j = 0; tags[j]; ++j)
1887 if(!strcmp(tag, tags[j])) break; /* tag found */
1888 if(!tags[j]) break; /* tag not found */
1890 /* Track must contain this word */
1891 for(j = 0; twords[j]; ++j)
1892 if(!strcmp(w[i], twords[j])) break; /* word found */
1893 if(!twords[j]) break; /* word not found */
1896 if(i >= nwordlist) /* all words found */
1897 vector_append(&u, v.vec[n]);
1901 trackdb_closecursor(cursor);
1903 trackdb_abort_transaction(tid);
1904 info("retrying search");
1906 trackdb_commit_transaction(tid);
1907 vector_terminate(&u);
1913 /* trackdb_scan **************************************************************/
1915 int trackdb_scan(const char *root,
1916 int (*callback)(const char *track,
1924 const size_t root_len = root ? strlen(root) : 0;
1929 cursor = trackdb_opencursor(trackdb_tracksdb, tid);
1931 err = cursor->c_get(cursor, make_key(&k, root), prepare_data(&d),
1934 memset(&k, 0, sizeof k);
1935 err = cursor->c_get(cursor, &k, prepare_data(&d),
1940 || (k.size > root_len
1941 && !strncmp(k.data, root, root_len)
1942 && ((char *)k.data)[root_len] == '/')) {
1943 data = kvp_urldecode(d.data, d.size);
1944 if(kvp_get(data, "_path")) {
1945 track = xstrndup(k.data, k.size);
1946 /* Advance to the next track before the callback so that the callback
1947 * may safely delete the track */
1948 err = cursor->c_get(cursor, &k, &d, DB_NEXT);
1949 if((cberr = callback(track, data, u, tid))) {
1954 err = cursor->c_get(cursor, &k, &d, DB_NEXT);
1958 trackdb_closecursor(cursor);
1965 case DB_LOCK_DEADLOCK:
1966 error(0, "c->c_get: %s", db_strerror(err));
1969 fatal(0, "c->c_get: %s", db_strerror(err));
1973 /* trackdb_rescan ************************************************************/
1975 /* called when the rescanner terminates */
1976 static int reap_rescan(ev_source attribute((unused)) *ev,
1979 const struct rusage attribute((unused)) *rusage,
1980 void attribute((unused)) *u) {
1981 if(pid == rescan_pid) rescan_pid = -1;
1983 error(0, "disorderd-rescan: %s", wstat(status));
1985 D(("disorderd-rescan terminate: %s", wstat(status)));
1986 /* Our cache of file lookups is out of date now */
1987 cache_clean(&cache_files_type);
1988 eventlog("rescanned", (char *)0);
1992 void trackdb_rescan(ev_source *ev) {
1993 if(rescan_pid != -1) {
1994 error(0, "rescan already underway");
1997 rescan_pid = subprogram(ev, RESCAN, -1);
1998 ev_child(ev, rescan_pid, 0, reap_rescan, 0);
1999 D(("started rescanner"));
2003 int trackdb_rescan_cancel(void) {
2004 if(rescan_pid == -1) return 0;
2005 if(kill(rescan_pid, SIGTERM) < 0)
2006 fatal(errno, "error killing rescanner");
2011 /* global prefs **************************************************************/
2013 void trackdb_set_global(const char *name,
2021 tid = trackdb_begin_transaction();
2022 if(!(err = trackdb_set_global_tid(name, value, tid)))
2024 trackdb_abort_transaction(tid);
2026 trackdb_commit_transaction(tid);
2027 /* log important state changes */
2028 if(!strcmp(name, "playing")) {
2029 state = !value || !strcmp(value, "yes");
2030 info("playing %s by %s",
2031 state ? "enabled" : "disabled",
2033 eventlog("state", state ? "enable_play" : "disable_play", (char *)0);
2035 if(!strcmp(name, "random-play")) {
2036 state = !value || !strcmp(value, "yes");
2037 info("random play %s by %s",
2038 state ? "enabled" : "disabled",
2040 eventlog("state", state ? "enable_random" : "disable_random", (char *)0);
2042 if(!strcmp(name, "required-tags"))
2046 int trackdb_set_global_tid(const char *name,
2052 memset(&k, 0, sizeof k);
2053 memset(&d, 0, sizeof d);
2054 k.data = (void *)name;
2055 k.size = strlen(name);
2057 d.data = (void *)value;
2058 d.size = strlen(value);
2061 err = trackdb_globaldb->put(trackdb_globaldb, tid, &k, &d, 0);
2063 err = trackdb_globaldb->del(trackdb_globaldb, tid, &k, 0);
2064 if(err == DB_LOCK_DEADLOCK) return err;
2066 fatal(0, "error updating database: %s", db_strerror(err));
2070 const char *trackdb_get_global(const char *name) {
2076 tid = trackdb_begin_transaction();
2077 if(!(err = trackdb_get_global_tid(name, tid, &r)))
2079 trackdb_abort_transaction(tid);
2081 trackdb_commit_transaction(tid);
2085 int trackdb_get_global_tid(const char *name,
2091 memset(&k, 0, sizeof k);
2092 k.data = (void *)name;
2093 k.size = strlen(name);
2094 switch(err = trackdb_globaldb->get(trackdb_globaldb, tid, &k,
2095 prepare_data(&d), 0)) {
2097 *rp = xstrndup(d.data, d.size);
2102 case DB_LOCK_DEADLOCK:
2105 fatal(0, "error reading database: %s", db_strerror(err));
2109 /** @brief Retrieve the most recently added tracks
2110 * @param ntracksp Where to put count, or 0
2111 * @param maxtracks Maximum number of tracks to retrieve
2112 * @return null-terminated array of track names
2114 * The most recently added track is first in the array.
2116 char **trackdb_new(int *ntracksp,
2122 tid = trackdb_begin_transaction();
2123 tracks = trackdb_new_tid(ntracksp, maxtracks, tid);
2126 trackdb_abort_transaction(tid);
2128 trackdb_commit_transaction(tid);
2132 /** @brief Retrieve the most recently added tracks
2133 * @param ntracksp Where to put count, or 0
2134 * @param maxtracks Maximum number of tracks to retrieve, or 0 for all
2135 * @param tid Transaction ID
2136 * @return null-terminated array of track names, or NULL on deadlock
2138 * The most recently added track is first in the array.
2140 static char **trackdb_new_tid(int *ntracksp,
2146 struct vector tracks[1];
2148 vector_init(tracks);
2149 c = trackdb_opencursor(trackdb_noticeddb, tid);
2150 while((maxtracks <= 0 || tracks->nvec < maxtracks)
2151 && !(err = c->c_get(c, prepare_data(&k), prepare_data(&d), DB_PREV)))
2152 vector_append(tracks, xstrndup(d.data, d.size));
2154 case 0: /* hit maxtracks */
2155 case DB_NOTFOUND: /* ran out of tracks */
2157 case DB_LOCK_DEADLOCK:
2158 trackdb_closecursor(c);
2161 fatal(0, "error reading noticed.db: %s", db_strerror(err));
2163 if((err = trackdb_closecursor(c)))
2164 return 0; /* deadlock */
2165 vector_terminate(tracks);
2167 *ntracksp = tracks->nvec;
2171 /** @brief Expire noticed.db
2172 * @param earliest Earliest timestamp to keep
2174 void trackdb_expire_noticed(time_t earliest) {
2178 tid = trackdb_begin_transaction();
2179 if(!trackdb_expire_noticed_tid(earliest, tid))
2181 trackdb_abort_transaction(tid);
2183 trackdb_commit_transaction(tid);
2186 /** @brief Expire noticed.db
2187 * @param earliest Earliest timestamp to keep
2188 * @param tid Transaction ID
2189 * @return 0 or DB_LOCK_DEADLOCK
2191 static int trackdb_expire_noticed_tid(time_t earliest, DB_TXN *tid) {
2199 c = trackdb_opencursor(trackdb_noticeddb, tid);
2200 while(!(err = c->c_get(c, prepare_data(&k), prepare_data(&d), DB_NEXT))) {
2202 when = (time_t)(((uint64_t)ntohl(kk[0]) << 32) + ntohl(kk[1]));
2203 if(when >= earliest)
2205 if((err = c->c_del(c, 0))) {
2206 if(err != DB_LOCK_DEADLOCK)
2207 fatal(0, "error deleting expired noticed.db entry: %s",
2213 if(err == DB_NOTFOUND)
2215 if(err && err != DB_LOCK_DEADLOCK)
2216 fatal(0, "error expiring noticed.db: %s", db_strerror(err));
2218 if((err = trackdb_closecursor(c))) {
2219 if(err != DB_LOCK_DEADLOCK)
2220 fatal(0, "error closing cursor: %s", db_strerror(err));
2224 info("expired %d tracks from noticed.db", count);
2228 /* tidying up ****************************************************************/
2230 void trackdb_gc(void) {
2234 if((err = trackdb_env->txn_checkpoint(trackdb_env,
2235 config->checkpoint_kbyte,
2236 config->checkpoint_min,
2238 fatal(0, "trackdb_env->txn_checkpoint: %s", db_strerror(err));
2239 if((err = trackdb_env->log_archive(trackdb_env, &logfiles, DB_ARCH_REMOVE)))
2240 fatal(0, "trackdb_env->log_archive: %s", db_strerror(err));
2241 /* This makes catastrophic recovery impossible. However, the user can still
2242 * preserve the important data by using disorder-dump to snapshot their
2243 * prefs, and later to restore it. This is likely to have much small
2244 * long-term storage requirements than record the db logfiles. */
2252 indent-tabs-mode:nil