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3dc3d7db RK |
1 | /* |
2 | * This file is part of DisOrder | |
5aff007d | 3 | * Copyright (C) 2007, 2008 Richard Kettlewell |
3dc3d7db | 4 | * |
e7eb3a27 | 5 | * This program is free software: you can redistribute it and/or modify |
3dc3d7db | 6 | * it under the terms of the GNU General Public License as published by |
e7eb3a27 | 7 | * the Free Software Foundation, either version 3 of the License, or |
3dc3d7db RK |
8 | * (at your option) any later version. |
9 | * | |
e7eb3a27 RK |
10 | * This program is distributed in the hope that it will be useful, |
11 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
13 | * GNU General Public License for more details. | |
14 | * | |
3dc3d7db | 15 | * You should have received a copy of the GNU General Public License |
e7eb3a27 | 16 | * along with this program. If not, see <http://www.gnu.org/licenses/>. |
3dc3d7db | 17 | */ |
132a5a4a RK |
18 | /** @file server/dbupgrade.c |
19 | * @brief Database upgrade utility | |
20 | * | |
21 | * Invoked by the server when necessary. | |
22 | */ | |
05b75f8d | 23 | #include "disorder-server.h" |
3dc3d7db RK |
24 | |
25 | static DB_TXN *global_tid; | |
26 | ||
de3bd7ad | 27 | #define BADKEY_WARN 0 |
28 | #define BADKEY_FAIL 1 | |
29 | #define BADKEY_DELETE 2 | |
30 | ||
31 | /** @brief Bad key behavior */ | |
32 | static int badkey = BADKEY_WARN; | |
33 | ||
34 | static long aliases_removed, keys_normalized, values_normalized, renoticed; | |
35 | static long keys_already_ok, values_already_ok; | |
36 | ||
3dc3d7db RK |
37 | static const struct option options[] = { |
38 | { "help", no_argument, 0, 'h' }, | |
39 | { "version", no_argument, 0, 'V' }, | |
40 | { "config", required_argument, 0, 'c' }, | |
41 | { "debug", no_argument, 0, 'd' }, | |
42 | { "no-debug", no_argument, 0, 'D' }, | |
de3bd7ad | 43 | { "delete-bad-keys", no_argument, 0, 'x' }, |
44 | { "fail-bad-keys", no_argument, 0, 'X' }, | |
3dc3d7db RK |
45 | { "syslog", no_argument, 0, 's' }, |
46 | { "no-syslog", no_argument, 0, 'S' }, | |
47 | { 0, 0, 0, 0 } | |
48 | }; | |
49 | ||
50 | /* display usage message and terminate */ | |
51 | static void help(void) { | |
52 | xprintf("Usage:\n" | |
53 | " disorder-dbupgrade [OPTIONS]\n" | |
54 | "Options:\n" | |
55 | " --help, -h Display usage message\n" | |
56 | " --version, -V Display version number\n" | |
57 | " --config PATH, -c PATH Set configuration file\n" | |
58 | " --debug, -d Turn on debugging\n" | |
59 | " --[no-]syslog Force logging\n" | |
de3bd7ad | 60 | " --delete-bad-keys, -x Delete unconvertible keys\n" |
61 | " --fail-bad-keys, -X Fail if bad keys are found\n" | |
3dc3d7db RK |
62 | "\n" |
63 | "Database upgrader for DisOrder. Not intended to be run\n" | |
64 | "directly.\n"); | |
65 | xfclose(stdout); | |
66 | exit(0); | |
67 | } | |
68 | ||
3dc3d7db RK |
69 | /** @brief Visit each key in a database and call @p callback |
70 | * @return 0 or DB_LOCK_DEADLOCK | |
71 | * | |
72 | * @p global_tid must be set. @p callback should return 0 or DB_LOCK_DEADLOCK. | |
73 | */ | |
74 | static int scan_core(const char *name, DB *db, | |
75 | int (*callback)(const char *name, DB *db, DBC *c, | |
76 | DBT *k, DBT *d)) { | |
77 | long count = 0; | |
78 | DBC *c = trackdb_opencursor(db, global_tid); | |
79 | int err, r = 0; | |
80 | DBT k[1], d[1]; | |
81 | ||
de3bd7ad | 82 | values_normalized = 0; |
83 | keys_normalized = 0; | |
84 | aliases_removed = 0; | |
85 | renoticed = 0; | |
86 | keys_already_ok = 0; | |
87 | values_already_ok = 0; | |
3dc3d7db RK |
88 | memset(k, 0, sizeof k); |
89 | memset(d, 0, sizeof d); | |
90 | while((err = c->c_get(c, k, d, DB_NEXT)) == 0) { | |
91 | if((err = callback(name, db, c, k, d))) | |
92 | break; | |
93 | ++count; | |
94 | if(count % 1000 == 0) | |
95 | info("scanning %s, %ld so far", name, count); | |
96 | } | |
97 | if(err && err != DB_NOTFOUND && err != DB_LOCK_DEADLOCK) | |
98 | fatal(0, "%s: error scanning database: %s", name, db_strerror(err)); | |
99 | r = (err == DB_LOCK_DEADLOCK ? err : 0); | |
100 | if((err = c->c_close(c))) | |
101 | fatal(0, "%s: error closing cursor: %s", name, db_strerror(err)); | |
de3bd7ad | 102 | info("%s: %ld entries scanned", name, count); |
103 | if(values_normalized || values_already_ok) | |
104 | info("%s: %ld values converted, %ld already ok", name, | |
105 | values_normalized, values_already_ok); | |
106 | if(keys_normalized || keys_already_ok) | |
107 | info("%s: %ld keys converted, %ld already OK", name, | |
108 | keys_normalized, keys_already_ok); | |
109 | if(aliases_removed) | |
110 | info("%s: %ld aliases removed", name, aliases_removed); | |
111 | if(renoticed) | |
112 | info("%s: %ld tracks re-noticed", name, renoticed); | |
3dc3d7db RK |
113 | return r; |
114 | } | |
115 | ||
116 | /** @brief Visit each key in a database and call @p callback | |
117 | * | |
118 | * Everything happens inside the @p global_tid tranasction. @p callback | |
119 | * should return 0 or DB_LOCK_DEADLOCK. | |
120 | */ | |
05b75f8d RK |
121 | static void scandb(const char *name, DB *db, |
122 | int (*callback)(const char *name, DB *db, DBC *c, | |
123 | DBT *k, DBT *d)) { | |
3dc3d7db RK |
124 | info("scanning %s", name); |
125 | for(;;) { | |
126 | global_tid = trackdb_begin_transaction(); | |
127 | if(scan_core(name, db, callback)) { | |
128 | trackdb_abort_transaction(global_tid); | |
129 | global_tid = 0; | |
130 | error(0, "detected deadlock, restarting scan"); | |
131 | continue; | |
132 | } else { | |
133 | trackdb_commit_transaction(global_tid); | |
134 | global_tid = 0; | |
135 | break; | |
136 | } | |
137 | } | |
138 | } | |
139 | ||
140 | /** @brief Truncate database @p db */ | |
141 | static void truncate_database(const char *name, DB *db) { | |
142 | u_int32_t count; | |
143 | int err; | |
144 | ||
145 | do { | |
146 | err = db->truncate(db, 0, &count, DB_AUTO_COMMIT); | |
147 | } while(err == DB_LOCK_DEADLOCK); | |
148 | if(err) | |
149 | fatal(0, "error truncating %s: %s", name, db_strerror(err)); | |
150 | } | |
151 | ||
152 | /* scan callbacks */ | |
153 | ||
154 | static int normalize_keys(const char *name, DB *db, DBC *c, | |
155 | DBT *k, DBT *d) { | |
156 | char *knfc; | |
157 | size_t nknfc; | |
158 | int err; | |
159 | ||
160 | /* Find the normalized form of the key */ | |
161 | knfc = utf8_compose_canon(k->data, k->size, &nknfc); | |
de3bd7ad | 162 | if(!knfc) { |
163 | switch(badkey) { | |
164 | case BADKEY_WARN: | |
165 | error(0, "%s: invalid key: %.*s", name, | |
166 | (int)k->size, (const char *)k->data); | |
167 | break; | |
168 | case BADKEY_DELETE: | |
169 | error(0, "%s: deleting invalid key: %.*s", name, | |
170 | (int)k->size, (const char *)k->data); | |
171 | if((err = c->c_del(c, 0))) { | |
172 | if(err != DB_LOCK_DEADLOCK) | |
173 | fatal(0, "%s: error removing denormalized key: %s", | |
174 | name, db_strerror(err)); | |
175 | return err; | |
176 | } | |
177 | break; | |
178 | case BADKEY_FAIL: | |
179 | fatal(0, "%s: invalid key: %.*s", name, | |
180 | (int)k->size, (const char *)k->data); | |
181 | } | |
182 | return 0; | |
183 | } | |
3dc3d7db | 184 | /* If the key is already in NFC then do nothing */ |
de3bd7ad | 185 | if(nknfc == k->size && !memcmp(k->data, knfc, nknfc)) { |
186 | ++keys_already_ok; | |
3dc3d7db | 187 | return 0; |
de3bd7ad | 188 | } |
3dc3d7db RK |
189 | /* To rename the key we must delete the old one and insert a new one */ |
190 | if((err = c->c_del(c, 0))) { | |
191 | if(err != DB_LOCK_DEADLOCK) | |
192 | fatal(0, "%s: error removing denormalized key: %s", | |
193 | name, db_strerror(err)); | |
194 | return err; | |
195 | } | |
196 | k->size = nknfc; | |
197 | k->data = knfc; | |
198 | if((err = db->put(db, global_tid, k, d, DB_NOOVERWRITE))) { | |
199 | if(err != DB_LOCK_DEADLOCK) | |
200 | fatal(0, "%s: error storing normalized key: %s", name, db_strerror(err)); | |
201 | return err; | |
202 | } | |
de3bd7ad | 203 | ++keys_normalized; |
3dc3d7db RK |
204 | return 0; |
205 | } | |
206 | ||
207 | static int normalize_values(const char *name, DB *db, | |
208 | DBC attribute((unused)) *c, | |
209 | DBT *k, DBT *d) { | |
210 | char *dnfc; | |
211 | size_t ndnfc; | |
212 | int err; | |
213 | ||
214 | /* Find the normalized form of the value */ | |
215 | dnfc = utf8_compose_canon(d->data, d->size, &ndnfc); | |
216 | if(!dnfc) | |
217 | fatal(0, "%s: cannot convert data to NFC: %.*s", name, | |
218 | (int)d->size, (const char *)d->data); | |
219 | /* If the key is already in NFC then do nothing */ | |
de3bd7ad | 220 | if(ndnfc == d->size && !memcmp(d->data, dnfc, ndnfc)) { |
221 | ++values_already_ok; | |
3dc3d7db | 222 | return 0; |
de3bd7ad | 223 | } |
3dc3d7db RK |
224 | d->size = ndnfc; |
225 | d->data = dnfc; | |
226 | if((err = db->put(db, global_tid, k, d, 0))) { | |
227 | if(err != DB_LOCK_DEADLOCK) | |
228 | fatal(0, "%s: error storing normalized data: %s", name, db_strerror(err)); | |
229 | return err; | |
230 | } | |
de3bd7ad | 231 | ++values_normalized; |
3dc3d7db RK |
232 | return 0; |
233 | } | |
234 | ||
235 | static int renotice(const char *name, DB attribute((unused)) *db, | |
236 | DBC attribute((unused)) *c, | |
237 | DBT *k, DBT *d) { | |
238 | const struct kvp *const t = kvp_urldecode(d->data, d->size); | |
239 | const char *const track = xstrndup(k->data, k->size); | |
240 | const char *const path = kvp_get(t, "_path"); | |
241 | int err; | |
242 | ||
de3bd7ad | 243 | if(!path) { |
244 | /* If an alias sorts later than the actual filename then it'll appear | |
245 | * in the scan. */ | |
246 | if(kvp_get(t, "_alias_for")) | |
247 | return 0; | |
3dc3d7db RK |
248 | fatal(0, "%s: no '_path' for %.*s", name, |
249 | (int)k->size, (const char *)k->data); | |
de3bd7ad | 250 | } |
3dc3d7db RK |
251 | switch(err = trackdb_notice_tid(track, path, global_tid)) { |
252 | case 0: | |
de3bd7ad | 253 | ++renoticed; |
3dc3d7db RK |
254 | return 0; |
255 | case DB_LOCK_DEADLOCK: | |
256 | return err; | |
257 | default: | |
258 | fatal(0, "%s: unexpected return from trackdb_notice_tid: %s", | |
259 | name, db_strerror(err)); | |
260 | } | |
261 | } | |
262 | ||
263 | static int remove_aliases_normalize_keys(const char *name, DB *db, DBC *c, | |
264 | DBT *k, DBT *d) { | |
265 | const struct kvp *const t = kvp_urldecode(d->data, d->size); | |
266 | int err; | |
267 | ||
268 | if(kvp_get(t, "_alias_for")) { | |
269 | /* This is an alias. We remove all the alias entries. */ | |
270 | if((err = c->c_del(c, 0))) { | |
271 | if(err != DB_LOCK_DEADLOCK) | |
272 | fatal(0, "%s: error removing alias: %s", name, db_strerror(err)); | |
273 | return err; | |
274 | } | |
de3bd7ad | 275 | ++aliases_removed; |
3dc3d7db | 276 | return 0; |
de3bd7ad | 277 | } else if(!kvp_get(t, "_path")) |
278 | error(0, "%s: %.*s has neither _alias_for nor _path", name, | |
279 | (int)k->size, (const char *)k->data); | |
3dc3d7db RK |
280 | return normalize_keys(name, db, c, k, d); |
281 | } | |
282 | ||
283 | /** @brief Upgrade the database to the current version | |
284 | * | |
285 | * This function is supposed to be idempotent, so if it is interrupted | |
286 | * half way through it is safe to restart. | |
287 | */ | |
288 | static void upgrade(void) { | |
289 | char buf[32]; | |
290 | ||
291 | info("upgrading database to dbversion %ld", config->dbversion); | |
292 | /* Normalize keys and values as required. We will also remove aliases as | |
293 | * they will be regenerated when we re-noticed the tracks. */ | |
294 | info("renormalizing keys"); | |
05b75f8d RK |
295 | scandb("tracks.db", trackdb_tracksdb, remove_aliases_normalize_keys); |
296 | scandb("prefs.db", trackdb_prefsdb, normalize_keys); | |
297 | scandb("global.db", trackdb_globaldb, normalize_keys); | |
298 | scandb("noticed.db", trackdb_noticeddb, normalize_values); | |
3dc3d7db RK |
299 | /* search.db and tags.db we will rebuild */ |
300 | info("regenerating search database and aliases"); | |
301 | truncate_database("search.db", trackdb_searchdb); | |
302 | truncate_database("tags.db", trackdb_tagsdb); | |
303 | /* Regenerate the search database and aliases */ | |
05b75f8d | 304 | scandb("tracks.db", trackdb_tracksdb, renotice); |
3dc3d7db RK |
305 | /* Finally update the database version */ |
306 | snprintf(buf, sizeof buf, "%ld", config->dbversion); | |
307 | trackdb_set_global("_dbversion", buf, 0); | |
308 | info("completed database upgrade"); | |
309 | } | |
310 | ||
311 | int main(int argc, char **argv) { | |
312 | int n, logsyslog = !isatty(2); | |
313 | ||
314 | set_progname(argv); | |
315 | mem_init(); | |
316 | if(!setlocale(LC_CTYPE, "")) fatal(errno, "error calling setlocale"); | |
de3bd7ad | 317 | while((n = getopt_long(argc, argv, "hVc:dDSsxX", options, 0)) >= 0) { |
3dc3d7db RK |
318 | switch(n) { |
319 | case 'h': help(); | |
3fbdc96d | 320 | case 'V': version("disorder-dbupgrade"); |
3dc3d7db RK |
321 | case 'c': configfile = optarg; break; |
322 | case 'd': debugging = 1; break; | |
323 | case 'D': debugging = 0; break; | |
324 | case 'S': logsyslog = 0; break; | |
325 | case 's': logsyslog = 1; break; | |
de3bd7ad | 326 | case 'x': badkey = BADKEY_DELETE; break; |
327 | case 'X': badkey = BADKEY_FAIL; break; | |
3dc3d7db RK |
328 | default: fatal(0, "invalid option"); |
329 | } | |
330 | } | |
331 | /* If stderr is a TTY then log there, otherwise to syslog. */ | |
332 | if(logsyslog) { | |
333 | openlog(progname, LOG_PID, LOG_DAEMON); | |
334 | log_default = &log_syslog; | |
335 | } | |
336 | if(config_read(0)) fatal(0, "cannot read configuration"); | |
337 | /* Open the database */ | |
d25c4615 RK |
338 | trackdb_init(TRACKDB_NO_RECOVER); |
339 | trackdb_open(TRACKDB_OPEN_FOR_UPGRADE); | |
3dc3d7db RK |
340 | upgrade(); |
341 | return 0; | |
342 | } | |
343 | ||
344 | /* | |
345 | Local Variables: | |
346 | c-basic-offset:2 | |
347 | comment-column:40 | |
348 | fill-column:79 | |
349 | indent-tabs-mode:nil | |
350 | End: | |
351 | */ |