-/*
- * $Id: cnid_index.c,v 1.5 2008-08-07 07:39:14 didg Exp $
- *
- * All Rights Reserved. See COPYING.
- */
-
-#ifdef HAVE_CONFIG_H
-#include "config.h"
-#endif /* HAVE_CONFIG_H */
-
-#ifdef HAVE_UNISTD_H
-#include <unistd.h>
-#endif /* HAVE_UNISTD_H */
-#ifdef HAVE_FCNTL_H
-#include <fcntl.h>
-#endif /* HAVE_FCNTL_H */
-#include <stdio.h>
-#include <stdlib.h>
-#include <errno.h>
-#include <signal.h>
-#include <string.h>
-#ifdef HAVE_SYS_TYPES_H
-#include <sys/types.h>
-#endif /* HAVE_SYS_TYPES_H */
-#include <sys/param.h>
-#ifdef HAVE_SYS_STAT_H
-#include <sys/stat.h>
-#endif /* HAVE_SYS_STAT_H */
-#include <time.h>
-#include <sys/file.h>
-
-#include <netatalk/endian.h>
-#include <atalk/cnid_dbd_private.h>
-#include <atalk/logger.h>
-
-#define LOCKFILENAME "lock"
-static int exit_sig = 0;
-
-/* Copy and past from etc/cnid_dbd/dbif.c */
-#include <db.h>
-
-#define DB_ERRLOGFILE "db_errlog"
-
-static DB_ENV *db_env = NULL;
-static DB_TXN *db_txn = NULL;
-static FILE *db_errlog = NULL;
-
-#ifdef CNID_BACKEND_DBD_TXN
-#define DBOPTIONS (DB_CREATE | DB_INIT_LOCK | DB_INIT_LOG | DB_INIT_MPOOL | DB_INIT_TXN)
-#else
-#define DBOPTIONS (DB_CREATE | DB_INIT_CDB | DB_INIT_MPOOL | DB_PRIVATE)
-#endif
-
-#define DBIF_DB_CNT 3
-
-#define DBIF_IDX_CNID 0
-#define DBIF_IDX_DEVINO 1
-#define DBIF_IDX_DIDNAME 2
-
-static struct db_table {
- char *name;
- DB *db;
- u_int32_t general_flags;
- DBTYPE type;
-} db_table[] =
-{
- { "cnid2.db", NULL, 0, DB_BTREE},
- { "devino.db", NULL, 0, DB_BTREE},
- { "didname.db", NULL, 0, DB_BTREE},
-};
-
-static char *old_dbfiles[] = {"cnid.db", NULL};
-
-/* --------------- */
-int didname(dbp, pkey, pdata, skey)
-DB *dbp _U_;
-const DBT *pkey _U_, *pdata;
-DBT *skey;
-{
-int len;
-
- memset(skey, 0, sizeof(DBT));
- skey->data = (char *)pdata->data + CNID_DID_OFS;
- /* FIXME: At least DB 4.0.14 and 4.1.25 pass in the correct length of
- pdata.size. strlen is therefore not needed. Also, skey should be zeroed
- out already. */
- len = strlen((char *)skey->data + CNID_DID_LEN);
- skey->size = CNID_DID_LEN + len + 1;
- return (0);
-}
-
-/* --------------- */
-int devino(dbp, pkey, pdata, skey)
-DB *dbp _U_;
-const DBT *pkey _U_, *pdata;
-DBT *skey;
-{
- memset(skey, 0, sizeof(DBT));
- skey->data = (char *)pdata->data + CNID_DEVINO_OFS;
- skey->size = CNID_DEVINO_LEN;
- return (0);
-}
-
-/* --------------- */
-static int db_compat_associate (DB *p, DB *s,
- int (*callback)(DB *, const DBT *,const DBT *, DBT *),
- u_int32_t flags)
-{
-#if DB_VERSION_MAJOR > 4 || (DB_VERSION_MAJOR == 4 && DB_VERSION_MINOR >= 1)
- return p->associate(p, db_txn, s, callback, flags);
-#else
-#if (DB_VERSION_MAJOR == 4 && DB_VERSION_MINOR == 0)
- return p->associate(p, s, callback, flags);
-#else
- return 0;
-#endif
-#endif
-}
-
-/* --------------- */
-static int db_compat_open(DB *db, char *file, char *name, DBTYPE type, int mode)
-{
- int ret;
-
-#if DB_VERSION_MAJOR > 4 || (DB_VERSION_MAJOR == 4 && DB_VERSION_MINOR >= 1)
- ret = db->open(db, db_txn, file, name, type, DB_CREATE, mode);
-#else
- ret = db->open(db, file, name, type, DB_CREATE, mode);
-#endif
-
- if (ret) {
- LOG(log_error, logtype_cnid, "error opening database %s: %s", name, db_strerror(ret));
- return -1;
- } else {
- return 0;
- }
-}
-
-/* --------------- */
-static int dbif_open(int do_truncate)
-{
- int ret;
- int i;
- u_int32_t count;
-
- for (i = 0; i != DBIF_DB_CNT; i++) {
- if ((ret = db_create(&(db_table[i].db), db_env, 0))) {
- LOG(log_error, logtype_cnid, "error creating handle for database %s: %s",
- db_table[i].name, db_strerror(ret));
- return -1;
- }
-
- if (db_table[i].general_flags) {
- if ((ret = db_table[i].db->set_flags(db_table[i].db, db_table[i].general_flags))) {
- LOG(log_error, logtype_cnid, "error setting flags for database %s: %s",
- db_table[i].name, db_strerror(ret));
- return -1;
- }
- }
-
- if (db_compat_open(db_table[i].db, db_table[0].name, db_table[i].name, db_table[i].type, 0664) < 0)
- return -1;
- if (db_errlog != NULL)
- db_table[i].db->set_errfile(db_table[i].db, db_errlog);
-
- if (do_truncate && i > 0) {
- if ((ret = db_table[i].db->truncate(db_table[i].db, db_txn, &count, 0))) {
- LOG(log_error, logtype_cnid, "error truncating database %s: %s",
- db_table[i].name, db_strerror(ret));
- return -1;
- }
- }
- }
-
- /* TODO: Implement CNID DB versioning info on new databases. */
- /* TODO: Make transaction support a runtime option. */
- /* Associate the secondary with the primary. */
- if ((ret = db_compat_associate(db_table[0].db, db_table[DBIF_IDX_DIDNAME].db, didname, (do_truncate)?DB_CREATE:0)) != 0) {
- LOG(log_error, logtype_cnid, "Failed to associate didname database: %s",db_strerror(ret));
- return -1;
- }
-
- if ((ret = db_compat_associate(db_table[0].db, db_table[DBIF_IDX_DEVINO].db, devino, (do_truncate)?DB_CREATE:0)) != 0) {
- LOG(log_error, logtype_cnid, "Failed to associate devino database: %s",db_strerror(ret));
- return -1;
- }
-
- return 0;
-}
-
-/* ------------------------ */
-static int dbif_closedb(void)
-{
- int i;
- int ret;
- int err = 0;
-
- for (i = DBIF_DB_CNT -1; i >= 0; i--) {
- if (db_table[i].db != NULL && (ret = db_table[i].db->close(db_table[i].db, 0))) {
- LOG(log_error, logtype_cnid, "error closing database %s: %s", db_table[i].name, db_strerror(ret));
- err++;
- }
- }
- if (err)
- return -1;
- return 0;
-}
-
-/* ------------------------ */
-static int dbif_close(void)
-{
- int ret;
- int err = 0;
-
- if (dbif_closedb())
- err++;
-
- if (db_env != NULL && (ret = db_env->close(db_env, 0))) {
- LOG(log_error, logtype_cnid, "error closing DB environment: %s", db_strerror(ret));
- err++;
- }
- if (db_errlog != NULL && fclose(db_errlog) == EOF) {
- LOG(log_error, logtype_cnid, "error closing DB logfile: %s", strerror(errno));
- err++;
- }
- if (err)
- return -1;
- return 0;
-}
-/* --------------- */
-static int upgrade_required(void)
-{
- int i;
- int found = 0;
- struct stat st;
-
- for (i = 0; old_dbfiles[i] != NULL; i++) {
- if ( !(stat(old_dbfiles[i], &st) < 0) ) {
- found++;
- continue;
- }
- if (errno != ENOENT) {
- LOG(log_error, logtype_cnid, "cnid_open: Checking %s gave %s", old_dbfiles[i], strerror(errno));
- found++;
- }
- }
- return found;
-}
-
-/* -------------------------- */
-static int dbif_sync(void)
-{
- int i;
- int ret;
- int err = 0;
-
- for (i = 0; i != /* DBIF_DB_CNT*/ 1; i++) {
- if ((ret = db_table[i].db->sync(db_table[i].db, 0))) {
- LOG(log_error, logtype_cnid, "error syncing database %s: %s", db_table[i].name, db_strerror(ret));
- err++;
- }
- }
-
- if (err)
- return -1;
- else
- return 0;
-}
-
-/* -------------------------- */
-static int dbif_count(const int dbi, u_int32_t *count)
-{
- int ret;
- DB_BTREE_STAT *sp;
- DB *db = db_table[dbi].db;
-
-#if DB_VERSION_MAJOR > 4 || (DB_VERSION_MAJOR == 4 && DB_VERSION_MINOR >= 3)
- ret = db->stat(db, db_txn, &sp, 0);
-#else
- ret = db->stat(db, &sp, 0);
-#endif
-
- if (ret) {
- LOG(log_error, logtype_cnid, "error getting stat infotmation on database: %s", db_strerror(errno));
- return -1;
- }
-
- *count = sp->bt_ndata;
- free(sp);
-
- return 0;
-}
-
-/* -------------------------- */
-static int dbd_check(char *dbdir)
-{
- u_int32_t c_didname = 0, c_devino = 0, c_cnid = 0;
-
- LOG(log_debug, logtype_cnid, "CNID database at `%s' is being checked (quick)", dbdir);
-
- if (dbif_count(DBIF_IDX_CNID, &c_cnid))
- return -1;
-
- if (dbif_count(DBIF_IDX_DEVINO, &c_devino))
- return -1;
-
- /* bailout after the first error */
- if ( c_cnid != c_devino) {
- LOG(log_error, logtype_cnid, "CNID database at `%s' corrupted (%u/%u)", dbdir, c_cnid, c_devino);
- return 1;
- }
-
- if (dbif_count(DBIF_IDX_DIDNAME, &c_didname))
- return -1;
-
- if ( c_cnid != c_didname) {
- LOG(log_error, logtype_cnid, "CNID database at `%s' corrupted (%u/%u)", dbdir, c_cnid, c_didname);
- return 1;
- }
-
- LOG(log_debug, logtype_cnid, "CNID database at `%s' seems ok, %u entries.", dbdir, c_cnid);
- return 0;
-}
-
-/* --------------- */
-/*
- * We assume our current directory is already the BDB homedir. Otherwise
- * opening the databases will not work as expected. If we use transactions,
- * dbif_env_init(), dbif_close() and dbif_stamp() are the only interface
- * functions that can be called without a valid transaction handle in db_txn.
- */
-static int dbif_env_init(void)
-{
- int ret;
-#ifdef CNID_BACKEND_DBD_TXN
- char **logfiles = NULL;
- char **file;
-#endif
-
- /* Refuse to do anything if this is an old version of the CNID database */
- if (upgrade_required()) {
- LOG(log_error, logtype_cnid, "Found version 1 of the CNID database. Please upgrade to version 2");
- return -1;
- }
-
- if ((db_errlog = fopen(DB_ERRLOGFILE, "a")) == NULL)
- LOG(log_warning, logtype_cnid, "error creating/opening DB errlogfile: %s", strerror(errno));
-
-#ifdef CNID_BACKEND_DBD_TXN
- if ((ret = db_env_create(&db_env, 0))) {
- LOG(log_error, logtype_cnid, "error creating DB environment: %s",
- db_strerror(ret));
- db_env = NULL;
- return -1;
- }
- if (db_errlog != NULL)
- db_env->set_errfile(db_env, db_errlog);
- db_env->set_verbose(db_env, DB_VERB_RECOVERY, 1);
- if ((ret = db_env->open(db_env, ".", DBOPTIONS | DB_PRIVATE | DB_RECOVER, 0))) {
- LOG(log_error, logtype_cnid, "error opening DB environment: %s",
- db_strerror(ret));
- db_env->close(db_env, 0);
- db_env = NULL;
- return -1;
- }
-
- if (db_errlog != NULL)
- fflush(db_errlog);
-
- if ((ret = db_env->close(db_env, 0))) {
- LOG(log_error, logtype_cnid, "error closing DB environment after recovery: %s",
- db_strerror(ret));
- db_env = NULL;
- return -1;
- }
-#endif
- if ((ret = db_env_create(&db_env, 0))) {
- LOG(log_error, logtype_cnid, "error creating DB environment after recovery: %s",
- db_strerror(ret));
- db_env = NULL;
- return -1;
- }
- if (db_errlog != NULL)
- db_env->set_errfile(db_env, db_errlog);
- if ((ret = db_env->open(db_env, ".", DBOPTIONS , 0))) {
- LOG(log_error, logtype_cnid, "error opening DB environment after recovery: %s",
- db_strerror(ret));
- db_env->close(db_env, 0);
- db_env = NULL;
- return -1;
- }
-
-#ifdef CNID_BACKEND_DBD_TXN
- if (db_env->log_archive(db_env, &logfiles, 0)) {
- LOG(log_error, logtype_cnid, "error getting list of stale logfiles: %s",
- db_strerror(ret));
- db_env->close(db_env, 0);
- db_env = NULL;
- return -1;
- }
- if (logfiles != NULL) {
- for (file = logfiles; *file != NULL; file++) {
- if (unlink(*file) < 0)
- LOG(log_warning, logtype_cnid, "Error removing stale logfile %s: %s", *file, strerror(errno));
- }
- free(logfiles);
- }
-#endif
- return 0;
-}
-
-
-static void sig_exit(int signo)
-{
- exit_sig = signo;
- return;
-}
-
-static void block_sigs_onoff(int block)
-{
- sigset_t set;
-
- sigemptyset(&set);
- sigaddset(&set, SIGINT);
- sigaddset(&set, SIGTERM);
- if (block)
- sigprocmask(SIG_BLOCK, &set, NULL);
- else
- sigprocmask(SIG_UNBLOCK, &set, NULL);
- return;
-}
-
-/* ------------------------ */
-int get_lock(void)
-{
- int lockfd;
- struct flock lock;
-
- if ((lockfd = open(LOCKFILENAME, O_RDWR | O_CREAT, 0644)) < 0) {
- LOG(log_error, logtype_cnid, "main: error opening lockfile: %s", strerror(errno));
- exit(1);
- }
-
- lock.l_start = 0;
- lock.l_whence = SEEK_SET;
- lock.l_len = 0;
- lock.l_type = F_WRLCK;
-
- if (fcntl(lockfd, F_SETLK, &lock) < 0) {
- if (errno == EACCES || errno == EAGAIN) {
- exit(0);
- } else {
- LOG(log_error, logtype_cnid, "main: fcntl F_WRLCK lockfile: %s", strerror(errno));
- exit(1);
- }
- }
-
- return lockfd;
-}
-
-/* ----------------------- */
-void set_signal(void)
-{
- struct sigaction sv;
-
- sv.sa_handler = sig_exit;
- sv.sa_flags = 0;
- sigemptyset(&sv.sa_mask);
- sigaddset(&sv.sa_mask, SIGINT);
- sigaddset(&sv.sa_mask, SIGTERM);
- if (sigaction(SIGINT, &sv, NULL) < 0 || sigaction(SIGTERM, &sv, NULL) < 0) {
- LOG(log_error, logtype_cnid, "main: sigaction: %s", strerror(errno));
- exit(1);
- }
- sv.sa_handler = SIG_IGN;
- sigemptyset(&sv.sa_mask);
- if (sigaction(SIGPIPE, &sv, NULL) < 0) {
- LOG(log_error, logtype_cnid, "main: sigaction: %s", strerror(errno));
- exit(1);
- }
-}
-
-/* ----------------------- */
-void free_lock(int lockfd)
-{
- struct flock lock;
-
- lock.l_start = 0;
- lock.l_whence = SEEK_SET;
- lock.l_len = 0;
- lock.l_type = F_UNLCK;
- fcntl(lockfd, F_SETLK, &lock);
- close(lockfd);
-}
-
-/* ------------------------ */
-int main(int argc, char *argv[])
-{
-#ifdef CNID_BACKEND_DBD_TXN
-
- fprintf(stderr, "%s doesn't work with db transaction enabled\n", argv[0]);
- exit (1);
-
-#else
- int err = 0;
- int ret;
- int lockfd;
- char *dir;
-
- set_processname("cnid_index");
- syslog_setup(log_debug, logtype_default, logoption_ndelay | logoption_pid, logfacility_daemon);
-
- if (argc != 2) {
- LOG(log_error, logtype_cnid, "main: not enough arguments");
- exit(1);
- }
-
- dir = argv[1];
-
- if (chdir(dir) < 0) {
- LOG(log_error, logtype_cnid, "chdir to %s failed: %s", dir, strerror(errno));
- exit(1);
- }
-
- /* Before we do anything else, check if there is an instance of cnid_dbd
- running already and silently exit if yes. */
- lockfd = get_lock();
-
- LOG(log_info, logtype_cnid, "Startup, DB dir %s", dir);
-
- set_signal();
-
- /* SIGINT and SIGTERM are always off, unless we get a return code of 0 from
- comm_rcv (no requests for one second, see above in loop()). That means we
- only shut down after one second of inactivity. */
- block_sigs_onoff(1);
-
- if (dbif_env_init() < 0)
- exit(2); /* FIXME: same exit code as failure for dbif_open() */
-
-#ifdef CNID_BACKEND_DBD_TXN
- if (dbif_txn_begin() < 0)
- exit(6);
-#endif
-
- if (dbif_open(0) < 0) {
-#ifdef CNID_BACKEND_DBD_TXN
- dbif_txn_abort();
-#endif
- dbif_close();
- exit(2);
- }
-
-#ifndef CNID_BACKEND_DBD_TXN
- if ((ret = dbd_check(dir))) {
- if (ret < 0) {
- dbif_close();
- exit(2);
- }
- dbif_closedb();
- LOG(log_info, logtype_cnid, "main: re-opening, secondaries will be rebuilt. This may take some time");
- if (dbif_open(1) < 0) {
- LOG(log_info, logtype_cnid, "main: re-opening databases failed");
- dbif_close();
- exit(2);
- }
- LOG(log_info, logtype_cnid, "main: rebuilt done");
- }
-#endif
-
-#ifdef CNID_BACKEND_DBD_TXN
- if (dbif_txn_commit() < 0)
- exit(6);
-#endif
-
-#ifndef CNID_BACKEND_DBD_TXN
- /* FIXME: Do we really need to sync before closing the DB? Just closing it
- should be enough. */
- if (dbif_sync() < 0)
- err++;
-#endif
-
- if (dbif_close() < 0)
- err++;
-
- free_lock(lockfd);
-
- if (err)
- exit(4);
-#endif
- return 0;
-}