2 * $Id: cnid_open.c,v 1.38 2002-02-01 19:51:09 jmarcus Exp $
4 * Copyright (c) 1999. Adrian Sun (asun@zoology.washington.edu)
5 * All Rights Reserved. See COPYRIGHT.
7 * CNID database support.
10 * 1) afpd already caches did's.
11 * 2) the database stores cnid's as both did/name and dev/ino pairs.
12 * 3) RootInfo holds the value of the NextID.
13 * 4) the cnid database gets called in the following manner --
15 * cnid = cnid_open(root_dir);
18 * newid = cnid_add(cnid, dev, ino, parent did,
19 * name, id); id is a hint for a specific id. pass 0 if you don't
20 * care. if the id is already assigned, you won't get what you
23 * given an id, get a did/name and dev/ino pair.
24 * name = cnid_get(cnid, &id); given an id, return the corresponding
26 * return code = cnid_delete(cnid, id); delete an entry.
28 * with AFP, CNIDs 0-2 have special meanings. here they are:
30 * 1 -- parent of root directory (handled by afpd)
31 * 2 -- root directory (handled by afpd)
33 * CNIDs 4-16 are reserved according to page 31 of the AFP 3.0 spec so,
34 * CNID_START begins at 17.
39 #endif /* HAVE_CONFIG_H */
47 #endif /* HAVE_UNISTD_H */
50 #endif /* HAVE_FCNTL_H */
51 #include <sys/param.h>
53 #include <atalk/logger.h>
54 #ifdef HAVE_SYS_TIME_H
56 #endif /* HAVE_SYS_TIME_H */
60 #include <atalk/adouble.h>
61 #include <atalk/cnid.h>
62 #include <atalk/util.h>
64 #include "cnid_private.h"
67 #define MIN(a, b) ((a) < (b) ? (a) : (b))
70 #define DBHOME ".AppleDB"
71 #define DBCNID "cnid.db"
72 #define DBDEVINO "devino.db"
73 #define DBDIDNAME "didname.db" /* did/full name mapping */
74 #define DBSHORTNAME "shortname.db" /* did/8+3 mapping */
75 #define DBMACNAME "macname.db" /* did/31 mapping */
76 #define DBLONGNAME "longname.db" /* did/unicode mapping */
77 #define DBLOCKFILE "cnid.lock"
78 #define DBRECOVERFILE "cnid.dbrecover"
79 #define DBCLOSEFILE "cnid.close"
84 /* we version the did/name database so that we can change the format
85 * if necessary. the key is in the form of a did/name pair. in this case,
87 #define DBVERSION_KEY "\0\0\0\0\0"
88 #define DBVERSION_KEYLEN 5
89 #define DBVERSION1 0x00000001U
90 #define DBVERSION DBVERSION1
92 #if DB_VERSION_MINOR > 1
93 #define DBOPTIONS (DB_CREATE | DB_INIT_MPOOL | DB_INIT_LOCK | \
94 DB_INIT_LOG | DB_INIT_TXN)
95 #else /* DB_VERSION_MINOR < 1 */
96 /*#define DBOPTIONS (DB_CREATE | DB_INIT_MPOOL | DB_INIT_LOCK | \
97 DB_INIT_LOG | DB_INIT_TXN | DB_TXN_NOSYNC)*/
98 #define DBOPTIONS (DB_CREATE | DB_INIT_MPOOL | DB_INIT_LOCK | \
99 DB_INIT_LOG | DB_INIT_TXN)
100 #endif /* DB_VERSION_MINOR */
102 /* Let's try and use the youngest lock detector if present.
103 * If we can't do that, then let DB3 use its default deadlock detector. */
104 #if defined DB_LOCK_YOUNGEST
105 #define DEAD_LOCK_DETECT DB_LOCK_YOUNGEST
106 #else /* DB_LOCK_YOUNGEST */
107 #define DEAD_LOCK_DETECT DB_LOCK_DEFAULT
108 #endif /* DB_LOCK_YOUNGEST */
110 #define MAXITER 0xFFFF /* maximum number of simultaneously open CNID
113 /* the first compare that's always done. */
114 static __inline__ int compare_did(const DBT *a, const DBT *b)
116 u_int32_t dida, didb;
118 memcpy(&dida, a->data, sizeof(dida));
119 memcpy(&didb, b->data, sizeof(didb));
123 /* sort did's and then names. this is for unix paths.
124 * i.e., did/unixname lookups. */
125 #if DB_VERSION_MINOR > 1
126 static int compare_unix(DB *db, const DBT *a, const DBT *b)
127 #else /* DB_VERSION_MINOR < 1 */
128 static int compare_unix(const DBT *a, const DBT *b)
129 #endif /* DB_VERSION_MINOR */
135 if ((ret = compare_did(a, b)))
138 sa = (u_int8_t *) a->data + 4; /* shift past did */
139 sb = (u_int8_t *) b->data + 4;
140 for (len = MIN(a->size, b->size); len-- > 4; sa++, sb++)
141 if ((ret = (*sa - *sb)))
142 return ret; /* sort by lexical ordering */
144 return a->size - b->size; /* sort by length */
147 /* sort did's and then names. this is for macified paths (i.e.,
148 * did/macname, and did/shortname. i think did/longname needs a
149 * unicode table to work. also, we can't use strdiacasecmp as that
150 * returns a match if a < b. */
151 #if DB_VERSION_MINOR > 1
152 static int compare_mac(DB *db, const DBT *a, const DBT *b)
153 #else /* DB_VERSION_MINOR < 1 */
154 static int compare_mac(const DBT *a, const DBT *b)
155 #endif /* DB_VERSION_MINOR */
161 if ((ret = compare_did(a, b)))
164 sa = (u_int8_t *) a->data + 4;
165 sb = (u_int8_t *) b->data + 4;
166 for (len = MIN(a->size, b->size); len-- > 4; sa++, sb++)
167 if ((ret = (_diacasemap[*sa] - _diacasemap[*sb])))
168 return ret; /* sort by lexical ordering */
170 return a->size - b->size; /* sort by length */
174 /* for unicode names -- right now it's the same as compare_mac. */
175 #if DB_VERSION_MINOR > 1
176 static int compare_unicode(DB *db, const DBT *a, const DBT *b)
177 #else /* DB_VERSION_MINOR < 1 */
178 static int compare_unicode(const DBT *a, const DBT *b)
179 #endif /* DB_VERSION_MINOR */
181 #if DB_VERSION_MINOR > 1
182 return compare_mac(db,a,b);
183 #else /* DB_VERSION_MINOR < 1 */
184 return compare_mac(a,b);
185 #endif /* DB_VERSION_MINOR */
188 void *cnid_open(const char *dir) {
189 struct stat st, rsb, lsb, csb;
191 char path[MAXPATHLEN + 1];
202 /* this checks .AppleDB */
203 if ((len = strlen(dir)) > (MAXPATHLEN - DBLEN - 1)) {
204 LOG(log_error, logtype_default, "cnid_open: Pathname too large: %s", dir);
208 if ((db = (CNID_private *)calloc(1, sizeof(CNID_private))) == NULL) {
209 LOG(log_error, logtype_default, "cnid_open: Unable to allocate memory for database");
213 db->magic = CNID_DB_MAGIC;
216 if (path[len - 1] != '/') {
221 lock.l_type = F_WRLCK;
222 lock.l_whence = SEEK_SET;
224 strcpy(path + len, DBHOME);
225 if ((stat(path, &st) < 0) && (ad_mkdir(path, 0777) < 0)) {
226 LOG(log_error, logtype_default, "cnid_open: DBHOME mkdir failed for %s", path);
230 /* Make sure cnid.lock goes in .AppleDB. */
234 /* Search for a byte lock. This allows us to cleanup the log files
235 * at cnid_close() in a clean fashion.
237 * NOTE: This won't work if multiple volumes for the same user refer
238 * to the sahe directory. */
239 strcat(path, DBLOCKFILE);
240 strcpy(db->lock_file, path);
241 if ((db->lockfd = open(path, O_RDWR | O_CREAT, 0666)) > -1) {
244 while (fcntl(db->lockfd, F_SETLK, &lock) < 0) {
245 if (++lock.l_start > MAXITER) {
246 LOG(log_error, logtype_default, "cnid_open: Cannot establish logfile cleanup for database environment %s lock (lock failed)", path);
254 LOG(log_error, logtype_default, "cnid_open: Cannot establish logfile cleanup lock for database environment %s (open() failed)", path);
257 path[len + DBHOMELEN] = '\0';
258 open_flag = DB_CREATE;
260 /* We need to be able to open the database environment with full
261 * transaction, logging, and locking support if we ever hope to
262 * be a true multi-acess file server. */
263 if ((rc = db_env_create(&db->dbenv, 0)) != 0) {
264 LOG(log_error, logtype_default, "cnid_open: db_env_create: %s", db_strerror(rc));
268 /* Setup internal deadlock detection. */
269 if ((rc = db->dbenv->set_lk_detect(db->dbenv, DEAD_LOCK_DETECT)) != 0) {
270 LOG(log_error, logtype_default, "cnid_open: set_lk_detect: %s", db_strerror(rc));
274 #if DB_VERSION_MINOR > 1
276 /* Take care of setting the DB_TXN_NOSYNC flag in db3 > 3.1.x. */
277 if ((rc = db->dbenv->set_flags(db->dbenv, DB_TXN_NOSYNC, 1)) != 0) {
278 LOG(log_error, logtype_default, "cnid_open: set_flags: %s", db_strerror(rc));
282 #endif /* DB_VERSION_MINOR > 1 */
284 /* Open the database environment. */
285 if ((rc = db->dbenv->open(db->dbenv, path, DBOPTIONS, 0666)) != 0) {
286 if (rc == DB_RUNRECOVERY) {
287 /* This is the mother of all errors. We _must_ fail here. */
288 LOG(log_error, logtype_default, "cnid_open: CATASTROPHIC ERROR opening database environment %s. Run db_recovery -c immediately", path);
292 /* We can't get a full transactional environment, so multi-access
293 * is out of the question. Let's assume a read-only environment,
294 * and try to at least get a shared memory pool. */
295 if ((rc = db->dbenv->open(db->dbenv, path, DB_INIT_MPOOL, 0666)) != 0) {
296 /* Nope, not a MPOOL, either. Last-ditch effort: we'll try to
297 * open the environment with no flags. */
298 if ((rc = db->dbenv->open(db->dbenv, path, 0, 0666)) != 0) {
299 LOG(log_error, logtype_default, "cnid_open: dbenv->open of %s failed: %s",
300 path, db_strerror(rc));
304 db->flags |= CNIDFLAG_DB_RO;
305 open_flag = DB_RDONLY;
306 LOG(log_info, logtype_default, "cnid_open: Obtained read-only database environment %s", path);
309 /* did/name reverse mapping. We use a BTree for this one. */
310 if ((rc = db_create(&db->db_didname, db->dbenv, 0)) != 0) {
311 LOG(log_error, logtype_default, "cnid_open: Failed to create did/name database: %s",
316 /*db->db_didname->set_bt_compare(db->db_didname, &compare_unix);*/
317 if ((rc = db->db_didname->open(db->db_didname, DBDIDNAME, NULL,
318 DB_HASH, open_flag, 0666))) {
319 LOG(log_error, logtype_default, "cnid_open: Failed to open did/name database: %s",
324 /* Check for version. This way we can update the database if we need
325 * to change the format in any way. */
326 memset(&key, 0, sizeof(key));
327 memset(&data, 0, sizeof(data));
328 key.data = DBVERSION_KEY;
329 key.size = DBVERSION_KEYLEN;
332 if ((rc = txn_begin(db->dbenv, NULL, &tid, 0)) != 0) {
333 LOG(log_error, logtype_default, "cnid_open: txn_begin: failed to check db version: %s",
335 db->db_didname->close(db->db_didname, 0);
339 while ((rc = db->db_didname->get(db->db_didname, tid, &key, &data, DB_RMW))) {
342 case DB_LOCK_DEADLOCK:
343 if ((ret = txn_abort(tid)) != 0) {
344 LOG(log_error, logtype_default, "cnid_open: txn_abort: %s", db_strerror(ret));
345 db->db_didname->close(db->db_didname, 0);
348 goto dbversion_retry;
351 u_int32_t version = htonl(DBVERSION);
353 data.data = &version;
354 data.size = sizeof(version);
357 if ((ret = db->db_didname->put(db->db_didname, tid, &key, &data,
359 if (ret == DB_LOCK_DEADLOCK) {
360 if ((ret = txn_abort(tid)) != 0) {
361 LOG(log_error, logtype_default, "cnid_open: txn_abort: %s",
363 db->db_didname->close(db->db_didname, 0);
366 goto dbversion_retry;
368 else if (ret == DB_RUNRECOVERY) {
369 /* At this point, we don't care if the transaction aborts
370 * successfully or not. */
372 LOG(log_error, logtype_default, "cnid_open: Error putting new version: %s",
374 db->db_didname->close(db->db_didname, 0);
378 break; /* while loop */
381 LOG(log_error, logtype_default, "cnid_open: Failed to check db version: %s",
383 db->db_didname->close(db->db_didname, 0);
388 if ((rc = txn_commit(tid, 0)) != 0) {
389 LOG(log_error, logtype_default, "cnid_open: Failed to commit db version: %s",
391 db->db_didname->close(db->db_didname, 0);
395 /* TODO In the future we might check for version number here. */
397 memcpy(&version, data.data, sizeof(version));
398 if (version != ntohl(DBVERSION)) {
404 /* did/macname (31 character) mapping. Use a BTree for this one. */
405 if ((rc = db_create(&db->db_macname, db->dbenv, 0)) != 0) {
406 LOG(log_error, logtype_default, "cnid_open: Failed to create did/macname database: %s",
408 db->db_didname->close(db->db_didname, 0);
412 db->db_macname->set_bt_compare(db->db_macname, &compare_mac);
413 if ((rc = db->db_macname->open(db->db_macname, DBMACNAME, NULL, DB_BTREE, open_flag, 0666)) != 0) {
414 LOG(log_error, logtype_default, "cnid_open: Failed to open did/macname database: %s",
416 db->db_didname->close(db->db_didname, 0);
420 /* did/shortname (DOS 8.3) mapping. Use a BTree for this one. */
421 if ((rc = db_create(&db->db_shortname, db->dbenv, 0)) != 0) {
422 LOG(log_error, logtype_default, "cnid_open: Failed to create did/shortname database: %s",
424 db->db_didname->close(db->db_didname, 0);
425 db->db_macname->close(db->db_macname, 0);
429 db->db_shortname->set_bt_compare(db->db_shortname, &compare_mac);
430 if ((rc = db->db_shortname->open(db->db_shortname, DBSHORTNAME, NULL, DB_BTREE, open_flag, 0666)) != 0) {
431 LOG(log_error, logtype_default, "cnid_open: Failed to open did/shortname database: %s",
433 db->db_didname->close(db->db_didname, 0);
434 db->db_macname->close(db->db_macname, 0);
438 /* did/longname (Unicode) mapping. Use a BTree for this one. */
439 if ((rc = db_create(&db->db_longname, db->dbenv, 0)) != 0) {
440 LOG(log_error, logtype_default, "cnid_open: Failed to create did/longname database: %s",
442 db->db_didname->close(db->db_didname, 0);
443 db->db_macname->close(db->db_macname, 0);
444 db->db_shortname->close(db->db_shortname, 0);
448 db->db_longname->set_bt_compare(db->db_longname, &compare_unicode);
449 if ((rc = db->db_longname->open(db->db_longname, DBLONGNAME, NULL, DB_BTREE, open_flag, 0666)) != 0) {
450 LOG(log_error, logtype_default, "cnid_open: Failed to open did/longname database: %s",
452 db->db_didname->close(db->db_didname, 0);
453 db->db_macname->close(db->db_macname, 0);
454 db->db_shortname->close(db->db_shortname, 0);
457 #endif /* EXTENDED_DB */
459 /* dev/ino reverse mapping. Use a hash for this one. */
460 if ((rc = db_create(&db->db_devino, db->dbenv, 0)) != 0) {
461 LOG(log_error, logtype_default, "cnid_open: Failed to create dev/ino database: %s",
463 db->db_didname->close(db->db_didname, 0);
465 db->db_macname->close(db->db_macname, 0);
466 db->db_shortname->close(db->db_shortname, 0);
467 db->db_longname->close(db->db_longname, 0);
468 #endif /* EXTENDED_DB */
472 if ((rc = db->db_devino->open(db->db_devino, DBDEVINO, NULL, DB_HASH, open_flag, 0666)) != 0) {
473 LOG(log_error, logtype_default, "cnid_open: Failed to open devino database: %s",
475 db->db_didname->close(db->db_didname, 0);
477 db->db_macname->close(db->db_macname, 0);
478 db->db_shortname->close(db->db_shortname, 0);
479 db->db_longname->close(db->db_longname, 0);
480 #endif /* EXTENDED_DB */
484 /* Main CNID database. Use a hash for this one. */
485 if ((rc = db_create(&db->db_cnid, db->dbenv, 0)) != 0) {
486 LOG(log_error, logtype_default, "cnid_open: Failed to create cnid database: %s",
488 db->db_didname->close(db->db_didname, 0);
490 db->db_macname->close(db->db_macname, 0);
491 db->db_shortname->close(db->db_shortname, 0);
492 db->db_longname->close(db->db_longname, 0);
493 #endif /* EXTENDED_DB */
494 db->db_devino->close(db->db_devino, 0);
499 if ((rc = db->db_cnid->open(db->db_cnid, DBCNID, NULL, DB_HASH, open_flag, 0666)) != 0) {
500 LOG(log_error, logtype_default, "cnid_open: Failed to open dev/ino database: %s",
502 db->db_didname->close(db->db_didname, 0);
504 db->db_macname->close(db->db_macname, 0);
505 db->db_shortname->close(db->db_shortname, 0);
506 db->db_longname->close(db->db_longname, 0);
507 #endif /* EXTENDED_DB */
511 /* Print out the version of DB3 we're linked against. */
512 LOG(log_info, logtype_default, "CNID DB initialized using %s",
513 db_version(NULL, NULL, NULL));
518 LOG(log_error, logtype_default, "cnid_open: Failed to setup CNID DB environment");
519 db->dbenv->close(db->dbenv, 0);
522 if (db->lockfd > -1) {
524 (void)remove(db->lock_file);