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/*
Copyright (c) 2009 Frank Lahm <franklahm@gmail.com>
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
*/
/*
dbd specs and implementation progress
=====================================
St := Status
Force option
------------
St Spec
-- ----
OK If -f is requested, ensure -e is too.
Check if volumes is using AFPVOL_CACHE, then wipe db from disk. Rebuild from ad-files.
1st pass: Scan volume
--------------------
St Type Check
-- ---- -----
OK F/D Make sure ad file exists
OK D Make sure .AppleDouble dir exist, create if missing. Error creating
it is fatal as that shouldn't happen as root.
OK F/D Delete orphaned ad-files, log dirs in ad-dir
OK F/D Check name encoding by roundtripping, log on error
OK F/D try: read CNID from ad file (if cnid caching is on)
try: fetch CNID from database
-> on mismatch: use CNID from file, update database (deleting both found CNIDs first)
-> if no CNID in ad file: write CNID from database to ad file
-> if no CNID in database: add CNID from ad file to database
-> on no CNID at all: create one and store in both places
OK F/D Add found CNID, DID, filename, dev/inode, stamp to rebuild database
OK F/D Check/update stamp (implicitly done while checking CNIDs)
2nd pass: Delete unused CNIDs
-----------------------------
St Spec
-- ----
OK Step through dbd (the one on disk) and rebuild-db from pass 1 and delete any CNID from
dbd not in rebuild db. This in only done in exclusive mode.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif /* HAVE_CONFIG_H */
#include <unistd.h>
#include <sys/types.h>
#include <stdlib.h>
#include <stdio.h>
#include <stdarg.h>
#include <limits.h>
#include <signal.h>
#include <string.h>
#include <errno.h>
#include <atalk/logger.h>
#include <atalk/cnid_dbd_private.h>
#include <atalk/volinfo.h>
#include <atalk/util.h>
#include "cmd_dbd.h"
#include "dbd.h"
#include "dbif.h"
#include "db_param.h"
#define DBOPTIONS (DB_CREATE | DB_INIT_LOCK | DB_INIT_LOG | DB_INIT_MPOOL | DB_INIT_TXN)
int nocniddb = 0; /* Dont open CNID database, only scan filesystem */
struct volinfo volinfo; /* needed by pack.c:idxname() */
volatile sig_atomic_t alarmed; /* flags for signals */
int db_locked; /* have we got the fcntl lock on lockfile ? */
static DBD *dbd;
static int verbose; /* Logging flag */
static int exclusive; /* Exclusive volume access */
static struct db_param db_param = {
NULL, /* Volume dirpath */
1, /* bdb logfile autoremove */
64 * 1024, /* bdb cachesize (64 MB) */
DEFAULT_MAXLOCKS, /* maxlocks */
DEFAULT_MAXLOCKOBJS, /* maxlockobjs */
0, /* flush_interval */
0, /* flush_frequency */
0, /* usock_file */
-1, /* fd_table_size */
-1, /* idle_timeout */
-1 /* max_vols */
};
static char dbpath[MAXPATHLEN+1]; /* Path to the dbd database */
/*
Provide some logging
*/
void dbd_log(enum logtype lt, char *fmt, ...)
{
int len;
static char logbuffer[1024];
va_list args;
if ( (lt == LOGSTD) || (verbose == 1)) {
va_start(args, fmt);
len = vsnprintf(logbuffer, 1023, fmt, args);
va_end(args);
logbuffer[1023] = 0;
printf("%s\n", logbuffer);
}
}
/*
SIGNAL handling:
catch SIGINT and SIGTERM which cause clean exit. Ignore anything else.
*/
static void sig_handler(int signo)
{
alarmed = 1;
return;
}
static void set_signal(void)
{
struct sigaction sv;
sv.sa_handler = sig_handler;
sv.sa_flags = SA_RESTART;
sigemptyset(&sv.sa_mask);
if (sigaction(SIGTERM, &sv, NULL) < 0) {
dbd_log( LOGSTD, "error in sigaction(SIGTERM): %s", strerror(errno));
exit(EXIT_FAILURE);
}
if (sigaction(SIGINT, &sv, NULL) < 0) {
dbd_log( LOGSTD, "error in sigaction(SIGINT): %s", strerror(errno));
exit(EXIT_FAILURE);
}
memset(&sv, 0, sizeof(struct sigaction));
sv.sa_handler = SIG_IGN;
sigemptyset(&sv.sa_mask);
if (sigaction(SIGABRT, &sv, NULL) < 0) {
dbd_log( LOGSTD, "error in sigaction(SIGABRT): %s", strerror(errno));
exit(EXIT_FAILURE);
}
if (sigaction(SIGHUP, &sv, NULL) < 0) {
dbd_log( LOGSTD, "error in sigaction(SIGHUP): %s", strerror(errno));
exit(EXIT_FAILURE);
}
if (sigaction(SIGQUIT, &sv, NULL) < 0) {
dbd_log( LOGSTD, "error in sigaction(SIGQUIT): %s", strerror(errno));
exit(EXIT_FAILURE);
}
}
static void usage (void)
{
printf("dbd (Netatalk %s)\n"
"Usage: dbd [-e|-t|-v|-x] -d [-i] | -s [-c|-n]| -r [-c|-f] | -u <path to netatalk volume>\n"
"dbd can dump, scan, reindex and rebuild Netatalk dbd CNID databases.\n"
"dbd must be run with appropriate permissions i.e. as root.\n\n"
"Main commands are:\n"
" -d Dump CNID database\n"
" Option: -i dump indexes too\n\n"
" -s Scan volume:\n"
" 1. Compare CNIDs in database with volume\n"
" 2. Check if .AppleDouble dirs exist\n"
" 3. Check if AppleDouble file exist\n"
" 4. Report orphaned AppleDouble files\n"
" 5. Check for directories inside AppleDouble directories\n"
" 6. Check name encoding by roundtripping, log on error\n"
" 7. Check for orphaned CNIDs in database (requires -e)\n"
" 8. Open and close adouble files\n"
" Options: -c Don't check .AppleDouble stuff, only ckeck orphaned.\n"
" -n Don't open CNID database, skip CNID checks.\n\n"
" -r Rebuild volume:\n"
" 1. Sync CNIDSs in database with volume\n"
" 2. Make sure .AppleDouble dir exist, create if missing\n"
" 3. Make sure AppleDouble file exists, create if missing\n"
" 4. Delete orphaned AppleDouble files\n"
" 5. Check for directories inside AppleDouble directories\n"
" 6. Check name encoding by roundtripping, log on error\n"
" 7. Check for orphaned CNIDs in database (requires -e)\n"
" 8. Open and close adouble files\n"
" Options: -c Don't create .AppleDouble stuff, only cleanup orphaned.\n"
" -f wipe database and rebuild from IDs stored in AppleDouble\n"
" files, only available for volumes without 'nocnidcache'\n"
" option. Implies -e.\n\n"
" -u Upgrade:\n"
" Opens the database which triggers any necessary upgrades,\n"
" then closes and exits.\n\n"
"General options:\n"
" -e only work on inactive volumes and lock them (exclusive)\n"
" -x rebuild indexes (just for completeness, mostly useless!)\n"
" -t show statistics while running\n"
" -v verbose\n\n"
"WARNING:\n"
"For -r -f restore of the CNID database from the adouble files,\n"
"the CNID must of course be synched to them files first with a plain -r rebuild!\n"
, VERSION
);
}
int main(int argc, char **argv)
{
int c, lockfd, ret = -1;
int dump=0, scan=0, rebuild=0, prep_upgrade=0, rebuildindexes=0, dumpindexes=0, force=0;
dbd_flags_t flags = 0;
char *volpath;
int cdir;
if (geteuid() != 0) {
usage();
exit(EXIT_FAILURE);
}
/* Inhereting perms in ad_mkdir etc requires this */
ad_setfuid(0);
while ((c = getopt(argc, argv, ":cdefinrstuvx")) != -1) {
switch(c) {
case 'c':
flags |= DBD_FLAGS_CLEANUP;
break;
case 'd':
dump = 1;
break;
case 'i':
dumpindexes = 1;
break;
case 's':
scan = 1;
flags |= DBD_FLAGS_SCAN;
break;
case 'n':
nocniddb = 1; /* FIXME: this could/should be a flag too for consistency */
break;
case 'r':
rebuild = 1;
break;
case 't':
flags |= DBD_FLAGS_STATS;
break;
case 'u':
prep_upgrade = 1;
break;
case 'v':
verbose = 1;
break;
case 'e':
exclusive = 1;
flags |= DBD_FLAGS_EXCL;
break;
case 'x':
rebuildindexes = 1;
break;
case 'f':
force = 1;
exclusive = 1;
flags |= DBD_FLAGS_FORCE | DBD_FLAGS_EXCL;
break;
case ':':
case '?':
usage();
exit(EXIT_FAILURE);
break;
}
}
if ((dump + scan + rebuild + prep_upgrade) != 1) {
usage();
exit(EXIT_FAILURE);
}
if ( (optind + 1) != argc ) {
usage();
exit(EXIT_FAILURE);
}
volpath = argv[optind];
setvbuf(stdout, (char *) NULL, _IONBF, 0);
/* Remember cwd */
if ((cdir = open(".", O_RDONLY)) < 0) {
dbd_log( LOGSTD, "Can't open dir: %s", strerror(errno));
exit(EXIT_FAILURE);
}
/* Setup signal handling */
set_signal();
/* Setup logging. Should be portable among *NIXes */
if (!verbose)
setuplog("default log_info /dev/tty");
else
setuplog("default log_debug /dev/tty");
/* Load .volinfo file */
if (loadvolinfo(volpath, &volinfo) == -1) {
dbd_log( LOGSTD, "Not a Netatalk volume at '%s', no .volinfo file at '%s/.AppleDesktop/.volinfo' or unknown volume options", volpath, volpath);
exit(EXIT_FAILURE);
}
if (vol_load_charsets(&volinfo) == -1) {
dbd_log( LOGSTD, "Error loading charsets!");
exit(EXIT_FAILURE);
}
/* Sanity checks to ensure we can touch this volume */
if (volinfo.v_vfs_ea != AFPVOL_EA_AD && volinfo.v_vfs_ea != AFPVOL_EA_SYS) {
dbd_log( LOGSTD, "Unknown Extended Attributes option: %u", volinfo.v_vfs_ea);
exit(EXIT_FAILURE);
}
/* Enuser dbpath is there, create if necessary */
struct stat st;
if (stat(volinfo.v_dbpath, &st) != 0) {
if (errno != ENOENT) {
dbd_log( LOGSTD, "Can't stat dbpath \"%s\": %s", volinfo.v_dbpath, strerror(errno));
exit(EXIT_FAILURE);
}
if ((mkdir(volinfo.v_dbpath, 0755)) != 0) {
dbd_log( LOGSTD, "Can't create dbpath \"%s\": %s", dbpath, strerror(errno));
exit(EXIT_FAILURE);
}
}
/* Put "/.AppleDB" at end of volpath, get path from volinfo file */
if ( (strlen(volinfo.v_dbpath) + strlen("/.AppleDB")) > MAXPATHLEN ) {
dbd_log( LOGSTD, "Volume pathname too long");
exit(EXIT_FAILURE);
}
strncpy(dbpath, volinfo.v_dbpath, MAXPATHLEN - strlen("/.AppleDB"));
strcat(dbpath, "/.AppleDB");
/* Check or create dbpath */
int dbdirfd = open(dbpath, O_RDONLY);
if (dbdirfd == -1 && errno == ENOENT) {
if (errno == ENOENT) {
if ((mkdir(dbpath, 0755)) != 0) {
dbd_log( LOGSTD, "Can't create .AppleDB for \"%s\": %s", dbpath, strerror(errno));
exit(EXIT_FAILURE);
}
} else {
dbd_log( LOGSTD, "Somethings wrong with .AppleDB for \"%s\", giving up: %s", dbpath, strerror(errno));
exit(EXIT_FAILURE);
}
} else {
close(dbdirfd);
}
/* Get db lock */
if ((db_locked = get_lock(LOCK_EXCL, dbpath)) == -1)
goto exit_noenv;
if (db_locked != LOCK_EXCL) {
/* Couldn't get exclusive lock, try shared lock if -e wasn't requested */
if (exclusive) {
dbd_log(LOGSTD, "Database is in use and exlusive was requested");
goto exit_noenv;
}
if ((db_locked = get_lock(LOCK_SHRD, NULL)) != LOCK_SHRD)
goto exit_noenv;
}
/* Check if -f is requested and wipe db if yes */
if ((flags & DBD_FLAGS_FORCE) && rebuild && (volinfo.v_flags & AFPVOL_CACHE)) {
char cmd[8 + MAXPATHLEN];
if ((db_locked = get_lock(LOCK_FREE, NULL)) != 0)
goto exit_noenv;
snprintf(cmd, 8 + MAXPATHLEN, "rm -rf \"%s\"", dbpath);
dbd_log( LOGDEBUG, "Removing old database of volume: '%s'", volpath);
system(cmd);
if ((mkdir(dbpath, 0755)) != 0) {
dbd_log( LOGSTD, "Can't create dbpath \"%s\": %s", dbpath, strerror(errno));
exit(EXIT_FAILURE);
}
dbd_log( LOGDEBUG, "Removed old database.");
if ((db_locked = get_lock(LOCK_EXCL, dbpath)) == -1)
goto exit_noenv;
}
/*
Lets start with the BerkeleyDB stuff
*/
if ( ! nocniddb) {
if ((dbd = dbif_init(dbpath, "cnid2.db")) == NULL)
goto exit_noenv;
if (dbif_env_open(dbd,
&db_param,
(db_locked == LOCK_EXCL) ? (DBOPTIONS | DB_RECOVER) : DBOPTIONS) < 0) {
dbd_log( LOGSTD, "error opening database!");
goto exit_noenv;
}
if (db_locked == LOCK_EXCL)
dbd_log( LOGDEBUG, "Finished recovery.");
if (dbif_open(dbd, NULL, rebuildindexes) < 0) {
dbif_close(dbd);
goto exit_failure;
}
/* Prepare upgrade ? We're done */
if (prep_upgrade) {
(void)dbif_txn_close(dbd, 1);
goto cleanup;
}
}
/* Downgrade db lock if not running exclusive */
if (!exclusive && (db_locked == LOCK_EXCL)) {
if (get_lock(LOCK_UNLOCK, NULL) != 0)
goto exit_failure;
if (get_lock(LOCK_SHRD, NULL) != LOCK_SHRD)
goto exit_failure;
}
/* Now execute given command scan|rebuild|dump */
if (dump && ! nocniddb) {
if (dbif_dump(dbd, dumpindexes) < 0) {
dbd_log( LOGSTD, "Error dumping database");
}
} else if ((rebuild && ! nocniddb) || scan) {
if (cmd_dbd_scanvol(dbd, &volinfo, flags) < 0) {
dbd_log( LOGSTD, "Error repairing database.");
}
}
cleanup:
/* Cleanup */
dbd_log(LOGDEBUG, "Closing db");
if (! nocniddb) {
if (dbif_close(dbd) < 0) {
dbd_log( LOGSTD, "Error closing database");
goto exit_failure;
}
}
exit_success:
ret = 0;
exit_failure:
if (dbif_env_remove(dbpath) < 0) {
dbd_log( LOGSTD, "Error removing BerkeleyDB database environment");
ret++;
}
get_lock(0, NULL);
exit_noenv:
if ((fchdir(cdir)) < 0)
dbd_log(LOGSTD, "fchdir: %s", strerror(errno));
if (ret == 0)
exit(EXIT_SUCCESS);
else
exit(EXIT_FAILURE);
}
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