2 Copyright (c) 2009 Frank Lahm <franklahm@gmail.com>
4 This program is free software; you can redistribute it and/or modify
5 it under the terms of the GNU General Public License as published by
6 the Free Software Foundation; either version 2 of the License, or
7 (at your option) any later version.
9 This program is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 GNU General Public License for more details.
16 dbd specs and implementation progress
17 =====================================
26 OK If -f is requested, ensure -e is too.
27 Check if volumes is using AFPVOL_CACHE, then wipe db from disk. Rebuild from ad-files.
34 OK F/D Make sure ad file exists
35 OK D Make sure .AppleDouble dir exist, create if missing. Error creating
36 it is fatal as that shouldn't happen as root.
37 OK F/D Delete orphaned ad-files, log dirs in ad-dir
38 OK F/D Check name encoding by roundtripping, log on error
39 OK F/D try: read CNID from ad file (if cnid caching is on)
40 try: fetch CNID from database
41 -> on mismatch: use CNID from file, update database (deleting both found CNIDs first)
42 -> if no CNID in ad file: write CNID from database to ad file
43 -> if no CNID in database: add CNID from ad file to database
44 -> on no CNID at all: create one and store in both places
45 OK F/D Add found CNID, DID, filename, dev/inode, stamp to rebuild database
46 OK F/D Check/update stamp (implicitly done while checking CNIDs)
49 2nd pass: Delete unused CNIDs
50 -----------------------------
54 OK Step through dbd (the one on disk) and rebuild-db from pass 1 and delete any CNID from
55 dbd not in rebuild db. This in only done in exclusive mode.
60 #endif /* HAVE_CONFIG_H */
63 #include <sys/types.h>
72 #include <atalk/logger.h>
73 #include <atalk/cnid_dbd_private.h>
74 #include <atalk/volinfo.h>
80 #define LOCKFILENAME "lock"
81 #define DBOPTIONS (DB_CREATE | DB_INIT_LOCK | DB_INIT_LOG | DB_INIT_MPOOL | DB_INIT_TXN)
83 int nocniddb = 0; /* Dont open CNID database, only scan filesystem */
84 volatile sig_atomic_t alarmed; /* flags for signals */
85 int db_locked; /* have we got the fcntl lock on lockfile ? */
88 static int verbose; /* Logging flag */
89 static int exclusive; /* Exclusive volume access */
90 static struct db_param db_param = {
91 NULL, /* Volume dirpath */
92 1, /* bdb logfile autoremove */
93 64 * 1024, /* bdb cachesize (64 MB) */
94 0, /* flush_interval */
95 0, /* flush_frequency */
97 -1, /* fd_table_size */
98 -1, /* idle_timeout */
101 static char dbpath[PATH_MAX]; /* Path to the dbd database */
106 void dbd_log(enum logtype lt, char *fmt, ...)
109 static char logbuffer[1024];
112 if ( (lt == LOGSTD) || (verbose == 1)) {
114 len = vsnprintf(logbuffer, 1023, fmt, args);
118 printf("%s\n", logbuffer);
124 catch SIGINT and SIGTERM which cause clean exit. Ignore anything else.
127 static void sig_handler(int signo)
133 static void set_signal(void)
137 sv.sa_handler = sig_handler;
138 sv.sa_flags = SA_RESTART;
139 sigemptyset(&sv.sa_mask);
140 if (sigaction(SIGTERM, &sv, NULL) < 0) {
141 dbd_log( LOGSTD, "error in sigaction(SIGTERM): %s", strerror(errno));
144 if (sigaction(SIGINT, &sv, NULL) < 0) {
145 dbd_log( LOGSTD, "error in sigaction(SIGINT): %s", strerror(errno));
149 memset(&sv, 0, sizeof(struct sigaction));
150 sv.sa_handler = SIG_IGN;
151 sigemptyset(&sv.sa_mask);
153 if (sigaction(SIGABRT, &sv, NULL) < 0) {
154 dbd_log( LOGSTD, "error in sigaction(SIGABRT): %s", strerror(errno));
157 if (sigaction(SIGHUP, &sv, NULL) < 0) {
158 dbd_log( LOGSTD, "error in sigaction(SIGHUP): %s", strerror(errno));
161 if (sigaction(SIGQUIT, &sv, NULL) < 0) {
162 dbd_log( LOGSTD, "error in sigaction(SIGQUIT): %s", strerror(errno));
169 * Get lock on db lock file
171 * @args cmd (r) !=0: lock, 0: unlock
172 * @args dbpath (r) path to lockfile, only used on first call,
173 * later the stored fd is used
174 * @returns 1 if lock was acquired, 0 if file is already locked, -1 on error
176 int get_lock(int cmd, const char *dbpath)
178 static int lockfd = -1;
179 char lockpath[PATH_MAX];
188 lock.l_whence = SEEK_SET;
190 lock.l_type = F_UNLCK;
191 fcntl(lockfd, F_SETLK, &lock);
198 if ( (strlen(dbpath) + strlen(LOCKFILENAME+1)) > (PATH_MAX - 1) ) {
199 dbd_log( LOGSTD, ".AppleDB pathname too long");
202 strncpy(lockpath, dbpath, PATH_MAX - 1);
203 strcat(lockpath, "/");
204 strcat(lockpath, LOCKFILENAME);
206 if ((lockfd = open(lockpath, O_RDWR | O_CREAT, 0644)) < 0) {
207 dbd_log( LOGSTD, "Error opening lockfile: %s", strerror(errno));
211 if ((stat(dbpath, &st)) != 0) {
212 dbd_log( LOGSTD, "Error statting lockfile: %s", strerror(errno));
216 if ((chown(lockpath, st.st_uid, st.st_gid)) != 0) {
217 dbd_log( LOGSTD, "Error inheriting lockfile permissions: %s", strerror(errno));
223 lock.l_whence = SEEK_SET;
225 lock.l_type = F_WRLCK;
227 if (fcntl(lockfd, F_SETLK, &lock) < 0) {
228 if (errno == EACCES || errno == EAGAIN) {
230 dbd_log(LOGSTD, "Database is in use and exlusive was requested");
233 dbd_log(LOGDEBUG, "get_lock: couldn't lock");
236 dbd_log( LOGSTD, "Error getting fcntl F_WRLCK on lockfile: %s", strerror(errno));
241 dbd_log(LOGDEBUG, "get_lock: got lock");
245 static void usage (void)
247 printf("Usage: dbd [-e|-t|-v|-x] -d [-i] | -s [-c|-n]| -r [-c|-f] | -u <path to netatalk volume>\n"
248 "dbd can dump, scan, reindex and rebuild Netatalk dbd CNID databases.\n"
249 "dbd must be run with appropiate permissions i.e. as root.\n\n"
250 "Main commands are:\n"
251 " -d Dump CNID database\n"
252 " Option: -i dump indexes too\n\n"
254 " 1. Compare CNIDs in database with volume\n"
255 " 2. Check if .AppleDouble dirs exist\n"
256 " 3. Check if AppleDouble file exist\n"
257 " 4. Report orphaned AppleDouble files\n"
258 " 5. Check for directories inside AppleDouble directories\n"
259 " 6. Check name encoding by roundtripping, log on error\n"
260 " 7. Check for orphaned CNIDs in database (requires -e)\n"
261 " 8. Open and close adouble files\n"
262 " Options: -c Don't check .AppleDouble stuff, only ckeck orphaned.\n"
263 " -n Don't open CNID database, skip CNID checks\n\n"
264 " -r Rebuild volume:\n"
265 " 1. Sync CNIDSs in database with volume\n"
266 " 2. Make sure .AppleDouble dir exist, create if missing\n"
267 " 3. Make sure AppleDouble file exists, create if missing\n"
268 " 4. Delete orphaned AppleDouble files\n"
269 " 5. Check for directories inside AppleDouble directories\n"
270 " 6. Check name encoding by roundtripping, log on error\n"
271 " 7. Check for orphaned CNIDs in database (requires -e)\n"
272 " 8. Open and close adouble files\n"
273 " Options: -c Don't create .AppleDouble stuff, only cleanup orphaned.\n"
274 " -f wipe database and rebuild from IDs stored in AppleDouble files,\n"
275 " only available for volumes without 'nocnidcache' option. Implies -e.\n\n"
276 " -u Prepare upgrade:\n"
277 " Before installing an upgraded version of Netatalk that is linked against\n"
278 " a newer BerkeleyDB lib, run `dbd -u ...` from the OLD Netatalk pior to\n"
279 " upgrading on all volumes. This removes the BerkleyDB environment.\n"
280 " On exit cnid_dbd does this automatically, so normally calling dbd -u should not be necessary.\n\n"
282 " -e only work on inactive volumes and lock them (exclusive)\n"
283 " -x rebuild indexes (just for completeness, mostly useless!)\n"
284 " -t show statistics while running\n"
287 "For -r -f restore of the CNID database from the adouble files, the CNID must of course\n"
288 "be synched to them files first with a plain -r rebuild !\n"
292 int main(int argc, char **argv)
294 int c, lockfd, ret = -1;
295 int dump=0, scan=0, rebuild=0, prep_upgrade=0, rebuildindexes=0, dumpindexes=0, force=0;
296 dbd_flags_t flags = 0;
298 struct volinfo volinfo;
301 if (geteuid() != 0) {
305 /* Inhereting perms in ad_mkdir etc requires this */
308 while ((c = getopt(argc, argv, ":cdefinrstuvx")) != -1) {
311 flags |= DBD_FLAGS_CLEANUP;
321 flags |= DBD_FLAGS_SCAN;
324 nocniddb = 1; /* FIXME: this could/should be a flag too for consistency */
330 flags |= DBD_FLAGS_STATS;
340 flags |= DBD_FLAGS_EXCL;
348 flags |= DBD_FLAGS_FORCE | DBD_FLAGS_EXCL;
358 if ((dump + scan + rebuild + prep_upgrade) != 1) {
363 if ( (optind + 1) != argc ) {
367 volpath = argv[optind];
369 setvbuf(stdout, (char *) NULL, _IONBF, 0);
372 if ((cdir = open(".", O_RDONLY)) < 0) {
373 dbd_log( LOGSTD, "Can't open dir: %s", strerror(errno));
377 /* Setup signal handling */
380 /* Setup logging. Should be portable among *NIXes */
382 setuplog("default log_info /dev/tty");
384 setuplog("default log_debug /dev/tty");
386 /* Load .volinfo file */
387 if (loadvolinfo(volpath, &volinfo) == -1) {
388 dbd_log( LOGSTD, "Not a Netatalk volume at '%s', no .volinfo file at '%s/.AppleDesktop/.volinfo' or unknown volume options", volpath, volpath);
391 if (vol_load_charsets(&volinfo) == -1) {
392 dbd_log( LOGSTD, "Error loading charsets!");
396 /* Sanity checks to ensure we can touch this volume */
397 if (volinfo.v_vfs_ea != AFPVOL_EA_AD && volinfo.v_vfs_ea != AFPVOL_EA_SYS) {
398 dbd_log( LOGSTD, "Unknown Extended Attributes option: %u", volinfo.v_vfs_ea);
402 /* Put "/.AppleDB" at end of volpath, get path from volinfo file */
403 if ( (strlen(volinfo.v_dbpath) + strlen("/.AppleDB")) > (PATH_MAX - 1) ) {
404 dbd_log( LOGSTD, "Volume pathname too long");
407 strncpy(dbpath, volinfo.v_dbpath, PATH_MAX - 9 - 1);
408 strcat(dbpath, "/.AppleDB");
410 /* Check or create dbpath */
411 int dbdirfd = open(dbpath, O_RDONLY);
412 if (dbdirfd == -1 && errno == ENOENT) {
413 if (errno == ENOENT) {
414 if ((mkdir(dbpath, 0755)) != 0) {
415 dbd_log( LOGSTD, "Can't create .AppleDB for \"%s\": %s", dbpath, strerror(errno));
419 dbd_log( LOGSTD, "Somethings wrong with .AppleDB for \"%s\", giving up: %s", dbpath, strerror(errno));
426 /* Get db lock, which exits if exclusive was requested and it already is locked */
427 if ((db_locked = get_lock(1, dbpath)) == -1)
430 /* Prepare upgrade ? */
432 if (dbif_prep_upgrade(dbpath))
437 /* Check if -f is requested and wipe db if yes */
438 if ((flags & DBD_FLAGS_FORCE) && rebuild && (volinfo.v_flags & AFPVOL_CACHE)) {
439 char cmd[8 + MAXPATHLEN];
440 if ((db_locked = get_lock(0, NULL)) != 0)
442 snprintf(cmd, 8 + MAXPATHLEN, "rm -f %s/*", dbpath);
443 dbd_log( LOGDEBUG, "Removing old database of volume: '%s'", volpath);
445 dbd_log( LOGDEBUG, "Removed old database.");
446 if ((db_locked = get_lock(1, dbpath)) == -1)
451 Lets start with the BerkeleyDB stuff
454 if ((dbd = dbif_init(dbpath, "cnid2.db")) == NULL)
457 if (dbif_env_open(dbd,
459 exclusive ? (DBOPTIONS | DB_RECOVER) : DBOPTIONS) < 0) {
460 dbd_log( LOGSTD, "error opening database!");
465 dbd_log( LOGDEBUG, "Finished recovery.");
467 if (dbif_open(dbd, NULL, rebuildindexes) < 0) {
472 if (dbd_stamp(dbd) < 0) {
478 /* Now execute given command scan|rebuild|dump */
479 if (dump && ! nocniddb) {
480 if (dbif_dump(dbd, dumpindexes) < 0) {
481 dbd_log( LOGSTD, "Error dumping database");
483 } else if ((rebuild && ! nocniddb) || scan) {
484 if (cmd_dbd_scanvol(dbd, &volinfo, flags) < 0) {
485 dbd_log( LOGSTD, "Error repairing database.");
490 dbd_log(LOGDEBUG, "Closing db");
492 if (dbif_close(dbd) < 0) {
493 dbd_log( LOGSTD, "Error closing database");
504 if ((fchdir(cdir)) < 0)
505 dbd_log(LOGSTD, "fchdir: %s", strerror(errno));