#include <stdio.h>
#include <errno.h>
#include <stdlib.h>
-#ifdef HAVE_SYS_TYPES_H
-#include <sys/types.h>
-#endif /* HAVE_SYS_TYPES_H */
#include <string.h>
#include <sys/types.h>
#include <sys/stat.h>
-#include <sys/cdefs.h>
#include <unistd.h>
-#include <atalk/logger.h>
+#include <arpa/inet.h>
+
#include <db.h>
+
+#include <atalk/logger.h>
+#include <atalk/util.h>
+
#include "db_param.h"
#include "dbif.h"
#include "pack.h"
#define DB_ERRLOGFILE "db_errlog"
-static char *old_dbfiles[] = {"cnid.db", NULL};
-
-/* --------------- */
-static int upgrade_required(const DBD *dbd)
+/*!
+ * Get the db stamp which is the st_ctime of the file "cnid2.db" and store it in buffer
+ */
+static int dbif_stamp(DBD *dbd, void *buffer, int size)
{
- int i;
- int cwd = -1;
- int ret = 0;
- int found = 0;
struct stat st;
+ int rc,cwd;
- if ( ! dbd->db_filename)
- /* in memory db */
- return 0;
+ if (size < 8)
+ return -1;
/* Remember cwd */
if ((cwd = open(".", O_RDONLY)) < 0) {
/* chdir to db_envhome */
if ((chdir(dbd->db_envhome)) != 0) {
LOG(log_error, logtype_cnid, "error chdiring to db_env '%s': %s", dbd->db_envhome, strerror(errno));
- ret = -1;
- goto exit;
+ return -1;
}
- 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++;
- }
+ if ((rc = stat(dbd->db_table[DBIF_CNID].name, &st)) < 0) {
+ LOG(log_error, logtype_cnid, "error stating database %s: %s", dbd->db_table[DBIF_CNID].name, db_strerror(errno));
+ return -1;
}
-exit:
- if (cwd != -1) {
- if ((fchdir(cwd)) != 0) {
- LOG(log_error, logtype_cnid, "error chdiring back: %s", strerror(errno));
- ret = -1;
- }
- close(cwd);
+ LOG(log_maxdebug, logtype_cnid,"stamp: %s", asctime(localtime(&st.st_ctime)));
+
+ memset(buffer, 0, size);
+ memcpy(buffer, &st.st_ctime, sizeof(st.st_ctime));
+
+ if ((fchdir(cwd)) != 0) {
+ LOG(log_error, logtype_cnid, "error chdiring back: %s", strerror(errno));
+ return -1;
+ }
+
+ return 0;
+}
+
+/*!
+ * Inititialize rootinfo key (which has CNID 0 as key)
+ *
+ * This also "stamps" the database, which means storing st.st_ctime of the
+ * "cnid2.db" file in the rootinfo data at the DEV offset
+ *
+ * @param dbd (rw) database handle
+ * @param version (r) database version number
+ *
+ * @returns -1 on error, 0 on success
+ */
+static int dbif_init_rootinfo(DBD *dbd, int version)
+{
+ DBT key, data;
+ uint32_t v;
+ char buf[ROOTINFO_DATALEN];
+
+ LOG(log_debug, logtype_cnid, "Setting CNID database version to %u", version);
+
+ v = version;
+ v = htonl(v);
+
+ memset(&key, 0, sizeof(key));
+ memset(&data, 0, sizeof(data));
+ key.data = ROOTINFO_KEY;
+ key.size = ROOTINFO_KEYLEN;
+ data.data = buf;
+ data.size = ROOTINFO_DATALEN;
+
+ memcpy(buf, ROOTINFO_DATA, ROOTINFO_DATALEN);
+ memcpy(buf + CNID_DID_OFS, &v, sizeof(v));
+ if (dbif_stamp(dbd, buf + CNID_DEV_OFS, CNID_DEV_LEN) < 0)
+ return -1;
+
+ if (dbif_put(dbd, DBIF_CNID, &key, &data, 0) < 0)
+ return -1;
+ if (dbif_txn_commit(dbd) != 1) {
+ LOG(log_error, logtype_cnid, "dbif_init_rootinfo: cant commit txn");
+ return -1;
+ }
+
+ return 0;
+}
+
+/*!
+ * Return CNID database version number
+ *
+ * Returns version in *version
+ *
+ * @returns -1 on error, 0 if theres no rootinfo key yet, 1 if *version is returned
+ */
+static int dbif_getversion(DBD *dbd, uint32_t *version)
+{
+ DBT key, data;
+ int ret;
+
+ LOG(log_maxdebug, logtype_cnid, "dbif_getversion: reading version info");
+
+ *version = -1;
+ memset(&key, 0, sizeof(key));
+ memset(&data, 0, sizeof(data));
+ key.data = ROOTINFO_KEY;
+ key.size = ROOTINFO_KEYLEN;
+
+ switch (dbif_get(dbd, DBIF_CNID, &key, &data, 0)) {
+ case 1: /* found */
+ memcpy(version, (char *)data.data + CNID_DID_OFS, sizeof(uint32_t));
+ *version = ntohl(*version);
+ LOG(log_debug, logtype_cnid, "CNID database version %u", *version);
+ ret = 1;
+ break;
+ case 0: /* not found */
+ LOG(log_debug, logtype_cnid, "dbif_getversion: no version info found");
+ ret = 0;
+ break;
+ default:
+ LOG(log_error, logtype_cnid, "dbif_getversion: database error");
+ ret = -1;
+ break;
+ }
+
+ return ret;
+}
+
+/*!
+ * Set CNID database version number
+ *
+ * Initializes rootinfo key as neccessary
+ * @returns -1 on error, 0 on success
+ */
+static int dbif_setversion(DBD *dbd, uint32_t version)
+{
+ int ret;
+ DBT key, data;
+ uint32_t v;
+
+ LOG(log_debug, logtype_cnid, "Setting CNID database version to %u", version);
+
+ v = version;
+ v = htonl(v);
+
+ memset(&key, 0, sizeof(key));
+ memset(&data, 0, sizeof(data));
+ key.data = ROOTINFO_KEY;
+ key.size = ROOTINFO_KEYLEN;
+
+ if ((ret = dbif_get(dbd, DBIF_CNID, &key, &data, 0)) == -1)
+ return -1;
+ if (ret == 0) {
+ /* No rootinfo key yet, init it */
+ if (dbif_init_rootinfo(dbd, CNID_VERSION) != 0)
+ return -1;
+ /* Now try again */
+ if (dbif_get(dbd, DBIF_CNID, &key, &data, 0) == -1)
+ return -1;
}
- return (ret < 0 ? ret : found);
+ memcpy((char *)data.data + CNID_DID_OFS, &v, sizeof(v));
+ data.size = ROOTINFO_DATALEN;
+ if (dbif_put(dbd, DBIF_CNID, &key, &data, 0) < 0)
+ return -1;
+
+ return 0;
}
/*!
- * Upgrade CNID database versions
+ * Upgrade CNID database versions, initialize rootinfo key as as necessary in dbif_setversion()
*
* For now this does nothing, as upgrading from ver. 0 to 1 is done in dbif_open
*/
+#define UNINTIALIZED_DB UINT32_MAX
static int dbif_upgrade(DBD *dbd)
{
- int version;
+ uint32_t version = CNID_VERSION_UNINTIALIZED_DB;
- if ((version = dbif_getversion(dbd)) == -1)
+ if (dbif_getversion(dbd, &version) == -1)
return -1;
+ if (version == CNID_VERSION_UNINTIALIZED_DB) {
+ version = CNID_VERSION;
+ if (dbif_setversion(dbd, CNID_VERSION) != 0)
+ return -1;
+ }
/*
* Do upgrade stuff ...
return ret;
}
-#include <atalk/util.h>
-
-/* --------------- */
-int dbif_stamp(DBD *dbd, void *buffer, int size)
+/*!
+ * Get lock on db lock file
+ *
+ * @args cmd (r) lock command:
+ * LOCK_FREE: close lockfd
+ * LOCK_UNLOCK: unlock lockm keep lockfd open
+ * LOCK_EXCL: F_WRLCK on lockfd
+ * LOCK_SHRD: F_RDLCK on lockfd
+ * @args dbpath (r) path to lockfile, only used on first call,
+ * later the stored fd is used
+ * @returns LOCK_FREE/LOCK_UNLOCK return 0 on success, -1 on error
+ * LOCK_EXCL/LOCK_SHRD return LOCK_EXCL or LOCK_SHRD respectively on
+ * success, 0 if the lock couldn't be acquired, -1 on other errors
+ */
+int get_lock(int cmd, const char *dbpath)
{
+ static int lockfd = -1;
+ int ret;
+ char lockpath[PATH_MAX];
struct stat st;
- int rc,cwd;
- if (size < 8)
- return -1;
+ switch (cmd) {
+ case LOCK_FREE:
+ if (lockfd == -1)
+ return -1;
+ close(lockfd);
+ lockfd = -1;
+ return 0;
- /* Remember cwd */
- if ((cwd = open(".", O_RDONLY)) < 0) {
- LOG(log_error, logtype_cnid, "error opening cwd: %s", strerror(errno));
- return -1;
- }
+ case LOCK_UNLOCK:
+ if (lockfd == -1)
+ return -1;
+ return unlock(lockfd, 0, SEEK_SET, 0);
- /* chdir to db_envhome */
- if ((chdir(dbd->db_envhome)) != 0) {
- LOG(log_error, logtype_cnid, "error chdiring to db_env '%s': %s", dbd->db_envhome, strerror(errno));
- return -1;
- }
+ case LOCK_EXCL:
+ case LOCK_SHRD:
+ if (lockfd == -1) {
+ if ( (strlen(dbpath) + strlen(LOCKFILENAME+1)) > (PATH_MAX - 1) ) {
+ LOG(log_error, logtype_cnid, ".AppleDB pathname too long");
+ return -1;
+ }
+ strncpy(lockpath, dbpath, PATH_MAX - 1);
+ strcat(lockpath, "/");
+ strcat(lockpath, LOCKFILENAME);
- if ((rc = stat(dbd->db_table[DBIF_CNID].name, &st)) < 0) {
- LOG(log_error, logtype_cnid, "error stating database %s: %s", dbd->db_table[DBIF_CNID].name, db_strerror(errno));
- return -1;
- }
+ if ((lockfd = open(lockpath, O_RDWR | O_CREAT, 0644)) < 0) {
+ LOG(log_error, logtype_cnid, "Error opening lockfile: %s", strerror(errno));
+ return -1;
+ }
- LOG(log_maxdebug, logtype_cnid,"stamp: %s", asctime(localtime(&st.st_ctime)));
+ if ((stat(dbpath, &st)) != 0) {
+ LOG(log_error, logtype_cnid, "Error statting lockfile: %s", strerror(errno));
+ return -1;
+ }
- memset(buffer, 0, size);
- memcpy(buffer, &st.st_ctime, sizeof(st.st_ctime));
+ if ((chown(lockpath, st.st_uid, st.st_gid)) != 0) {
+ LOG(log_error, logtype_cnid, "Error inheriting lockfile permissions: %s",
+ strerror(errno));
+ return -1;
+ }
+ }
+
+ if (cmd == LOCK_EXCL)
+ ret = write_lock(lockfd, 0, SEEK_SET, 0);
+ else
+ ret = read_lock(lockfd, 0, SEEK_SET, 0);
+
+ if (ret != 0) {
+ if (cmd == LOCK_SHRD)
+ LOG(log_error, logtype_cnid, "Volume CNID db is locked, try again...");
+ return 0;
+ }
- if ((fchdir(cwd)) != 0) {
- LOG(log_error, logtype_cnid, "error chdiring back: %s", strerror(errno));
+ LOG(log_debug, logtype_cnid, "get_lock: got %s lock",
+ cmd == LOCK_EXCL ? "LOCK_EXCL" : "LOCK_SHRD");
+ return cmd;
+
+ default:
return -1;
- }
+ } /* switch(cmd) */
- return 0;
+ /* deadc0de, never get here */
+ return -1;
}
/* --------------- */
/*
We must open the db_env with an absolute pathname, as `dbd` keeps chdir'ing, which
breaks e.g. bdb logfile-rotation with relative pathnames.
- But still we use relative paths with upgrade_required() and the DB_ERRLOGFILE
+ But still we use relative paths with DB_ERRLOGFILE
in order to avoid creating absolute paths by copying. Both have no problem with
a relative path.
*/
{
int ret;
- /* Refuse to do anything if this is an old version of the CNID database */
- if (upgrade_required(dbd)) {
- LOG(log_error, logtype_cnid, "Found version 1 of the CNID database. Please upgrade to version 2");
- return -1;
- }
-
if ((ret = db_env_create(&dbd->db_env, 0))) {
LOG(log_error, logtype_cnid, "error creating DB environment: %s",
db_strerror(ret));
return -1;
}
+ dbd->db_param = *dbp;
+
if ((dbif_openlog(dbd)) != 0)
return -1;
if (reindex)
LOG(log_info, logtype_cnid, "Reindexing name index...");
- int version = CNID_VERSION;
- if (dbd->db_envhome) {
- if ((version = dbif_getversion(dbd)) == -1)
+ /*
+ * Upgrading from version 0 to 1 requires adding the name index below which
+ * must be done by specifying the DB_CREATE flag
+ */
+ uint32_t version = CNID_VERSION;
+ if (dbd->db_envhome && !reindex) {
+ if (dbif_getversion(dbd, &version) == -1)
return -1;
}
return 1;
}
-/*!
- * Inititialize rootinfo key (which has CNID 0 as key)
- *
- * This also "stamps" the database, which means storing st.st_ctime of the
- * "cnid2.db" file in the rootinfo data at the DEV offset
- *
- * @param dbd (rw) database handle
- * @param version (r) database version number
- *
- * @returns -1 on error, 0 on success
- */
-static int dbif_init_rootinfo(DBD *dbd, int version)
-{
- DBT key, data;
- uint32_t v;
- char buf[ROOTINFO_DATALEN];
-
- LOG(log_debug, logtype_cnid, "Setting CNID database version to %u", version);
-
- v = version;
- v = htonl(v);
-
- memset(&key, 0, sizeof(key));
- memset(&data, 0, sizeof(data));
- key.data = ROOTINFO_KEY;
- key.size = ROOTINFO_KEYLEN;
- data.data = buf;
- data.size = ROOTINFO_DATALEN;
-
- memcpy(buf, ROOTINFO_DATA, ROOTINFO_DATALEN);
- memcpy(buf + CNID_DID_OFS, &v, sizeof(v));
- if (dbif_stamp(dbd, buf + CNID_DEV_OFS, CNID_DEV_LEN) < 0)
- return -1;
-
- if (dbif_put(dbd, DBIF_CNID, &key, &data, 0) < 0)
- return -1;
-
- return 0;
-}
-
-/*!
- * Initialize or return CNID database version number
- *
- * Calls dbif_init_rootinfo if the rootinfo key does not exist yet
- *
- * @returns -1 on error, version number otherwise
- */
-int dbif_getversion(DBD *dbd)
-{
- DBT key, data;
- uint32_t version;
- int ret;
-
- memset(&key, 0, sizeof(key));
- memset(&data, 0, sizeof(data));
- key.data = ROOTINFO_KEY;
- key.size = ROOTINFO_KEYLEN;
-
- switch (dbif_get(dbd, DBIF_CNID, &key, &data, 0)) {
- case 1: /* found */
- memcpy(&version, (char *)data.data + CNID_DID_OFS, sizeof(version));
- version = ntohl(version);
- LOG(log_debug, logtype_cnid, "CNID database version %u", version);
- ret = version;
- break;
- case 0: /* not found */
- if (dbif_init_rootinfo(dbd, CNID_VERSION) != 0)
- return -1;
- ret = CNID_VERSION;
- break;
- default:
- return -1;
- }
- return ret;
-}
-
-/*!
- * Set CNID database version number
- *
- * Initializes rootinfo key as neccessary, as does dbif_getversion
- * @returns -1 on error, version number otherwise
- */
-int dbif_setversion(DBD *dbd, int version)
-{
- int ret;
- DBT key, data;
- uint32_t v;
-
- LOG(log_debug, logtype_cnid, "Setting CNID database version to %u", version);
-
- v = version;
- v = htonl(v);
-
- memset(&key, 0, sizeof(key));
- memset(&data, 0, sizeof(data));
- key.data = ROOTINFO_KEY;
- key.size = ROOTINFO_KEYLEN;
-
- if ((ret = dbif_get(dbd, DBIF_CNID, &key, &data, 0)) == -1)
- return -1;
- if (ret == 0) {
- /* No rootinfo key yet, init it */
- if (dbif_init_rootinfo(dbd, CNID_VERSION) != 0)
- return -1;
- /* Now try again */
- if (dbif_get(dbd, DBIF_CNID, &key, &data, 0) == -1)
- return -1;
- }
- memcpy((char *)data.data + CNID_DID_OFS, &v, sizeof(v));
- data.size = ROOTINFO_DATALEN;
- if (dbif_put(dbd, DBIF_CNID, &key, &data, 0) < 0)
- return -1;
-
- return 0;
-}
-
/*!
* Search the database by name
*
}
/*
- ret = 1 -> commit txn
- ret = 0 -> abort txn -> exit!
+ ret = 1 -> commit txn if db_param.txn_frequency
+ ret = 0 -> abort txn db_param.txn_frequency -> exit!
anything else -> exit!
+
+ @returns 0 on success (abort or commit), -1 on error
*/
-void dbif_txn_close(DBD *dbd, int ret)
+int dbif_txn_close(DBD *dbd, int ret)
{
if (ret == 0) {
if (dbif_txn_abort(dbd) < 0) {
LOG( log_error, logtype_cnid, "Fatal error aborting transaction. Exiting!");
- exit(EXIT_FAILURE);
+ return -1;
}
} else if (ret == 1) {
ret = dbif_txn_commit(dbd);
if ( ret < 0) {
LOG( log_error, logtype_cnid, "Fatal error committing transaction. Exiting!");
- exit(EXIT_FAILURE);
+ return -1;
}
- } else
- exit(EXIT_FAILURE);
+ } else {
+ return -1;
+ }
+
+ return 0;
}
int dbif_txn_checkpoint(DBD *dbd, u_int32_t kbyte, u_int32_t min, u_int32_t flags)
projects / netatalk.git / blobdiff