/*
- * $Id: cnid_add.c,v 1.33 2003-02-07 15:00:55 didg Exp $
+ * $Id: cnid_add.c,v 1.34 2003-03-07 14:51:50 didg Exp $
*
* Copyright (c) 1999. Adrian Sun (asun@zoology.washington.edu)
* All Rights Reserved. See COPYRIGHT.
return rc;
}
-cnid_t cnid_add(void *CNID, const struct stat *st,
- const cnid_t did, const char *name, const int len,
- cnid_t hint)
-{
- CNID_private *db;
- DBT key, data, rootinfo_key, rootinfo_data;
+/* ---------------------- */
#ifndef CNID_DB_CDB
+static cnid_t get_cnid(CNID_private *db)
+{
+ DBT rootinfo_key, rootinfo_data;
DB_TXN *tid;
-#endif /* CNID_DB_CDB */
- cnid_t id;
int rc;
-
- if (!(db = CNID) || !st || !name) {
- errno = CNID_ERR_PARAM;
- return CNID_INVALID;
- }
-
- /* Do a lookup. */
- id = cnid_lookup(db, st, did, name, len);
- /* ... Return id if it is valid, or if Rootinfo is read-only. */
- if (id || (db->flags & CNIDFLAG_DB_RO)) {
-#ifdef DEBUG
- LOG(log_info, logtype_default, "cnid_add: Looked up did %u, name %s as %u", ntohl(did), name, ntohl(id));
-#endif
- return id;
- }
-
- /* Initialize our DBT data structures. */
- memset(&key, 0, sizeof(key));
- memset(&data, 0, sizeof(data));
-
- /* Just tickle hint, and the key will change (gotta love pointers). */
- key.data = &hint;
- key.size = sizeof(hint);
-
- if ((data.data = make_cnid_data(st, did, name, len)) == NULL) {
- LOG(log_error, logtype_default, "cnid_add: Path name is too long");
- errno = CNID_ERR_PATH;
- return CNID_INVALID;
- }
-
- data.size = CNID_HEADER_LEN + len + 1;
-
- /* Start off with the hint. It should be in network byte order.
- * We need to make sure that somebody doesn't add in restricted
- * cnid's to the database. */
- if (ntohl(hint) >= CNID_START) {
- /* If the key doesn't exist, add it in. Don't fiddle with nextID. */
- rc = add_cnid(db, &key, &data);
- switch (rc) {
- case DB_KEYEXIST: /* Need to use RootInfo after all. */
- break;
- default:
- LOG(log_error, logtype_default, "cnid_add: Unable to add CNID %u: %s", ntohl(hint), db_strerror(rc));
- errno = CNID_ERR_DB;
- return CNID_INVALID;
- case 0:
-#ifdef DEBUG
- LOG(log_info, logtype_default, "cnid_add: Used hint for did %u, name %s as %u", ntohl(did), name, ntohl(hint));
-#endif
- return hint;
- }
- }
+ int flag;
+ cnid_t hint,id;
memset(&rootinfo_key, 0, sizeof(rootinfo_key));
memset(&rootinfo_data, 0, sizeof(rootinfo_data));
rootinfo_key.data = ROOTINFO_KEY;
rootinfo_key.size = ROOTINFO_KEYLEN;
-#ifndef CNID_DB_CDB
retry:
if ((rc = txn_begin(db->dbenv, NULL, &tid, 0)) != 0) {
LOG(log_error, logtype_default, "cnid_add: Failed to begin transaction: %s", db_strerror(rc));
errno = CNID_ERR_DB;
return CNID_INVALID;
}
-#endif /* CNID_DB_CDB */
-
- /* Get the key. */
-#ifdef CNID_DB_CDB
- switch (rc = db->db_didname->get(db->db_didname, NULL, &rootinfo_key,
- &rootinfo_data, 0)) {
-#else /* CNID_DB_CDB */
switch (rc = db->db_didname->get(db->db_didname, tid, &rootinfo_key,
&rootinfo_data, DB_RMW)) {
case DB_LOCK_DEADLOCK:
return CNID_INVALID;
}
goto retry;
-#endif /* CNID_DB_CDB */
case 0:
memcpy(&hint, rootinfo_data.data, sizeof(hint));
id = ntohl(hint);
/* If we've hit the max CNID allowed, we return a fatal error. CNID
* needs to be recycled before proceding. */
if (++id == CNID_INVALID) {
-#ifndef CNID_DB_CDB
txn_abort(tid);
-#endif /* CNID_DB_CDB */
LOG(log_error, logtype_default, "cnid_add: FATAL: Cannot add CNID for %s. CNID database has reached its limit.", name);
errno = CNID_ERR_MAX;
return CNID_INVALID;
rootinfo_data.size = sizeof(hint);
switch (rc = db->db_didname->put(db->db_didname, tid, &rootinfo_key, &rootinfo_data, 0)) {
-#ifndef CNID_DB_CDB
case DB_LOCK_DEADLOCK:
if ((rc = txn_abort(tid)) != 0) {
LOG(log_error, logtype_default, "cnid_add: txn_abort: %s", db_strerror(rc));
return CNID_INVALID;
}
goto retry;
-#endif /* CNID_DB_CDB */
case 0:
-#ifndef CNID_DB_CDB
/* The transaction finished, commit it. */
if ((rc = txn_commit(tid, 0)) != 0) {
LOG(log_error, logtype_default, "cnid_add: Unable to commit transaction: %s", db_strerror(rc));
errno = CNID_ERR_DB;
return CNID_INVALID;
}
-#endif /* CNID_DB_CDB */
break;
default:
LOG(log_error, logtype_default, "cnid_add: Unable to update rootinfo: %s", db_strerror(rc));
goto cleanup_abort;
}
+ return hint;
+
+cleanup_abort:
+ txn_abort(tid);
+ errno = CNID_ERR_DB;
+ return CNID_INVALID;
+}
+#else
+static cnid_t get_cnid(CNID_private *db)
+{
+ DBT rootinfo_key, rootinfo_data;
+ DBC *cursor;
+ int rc;
+ int flag;
+ cnid_t hint,id;
+
+ if ((rc = db->db_didname->cursor(db->db_didname, NULL, &cursor, DB_WRITECURSOR) ) != 0) {
+ LOG(log_error, logtype_default, "get_cnid: Unable to get a cursor: %s", db_strerror(rc));
+ return CNID_INVALID;
+ }
+
+ memset(&rootinfo_key, 0, sizeof(rootinfo_key));
+ memset(&rootinfo_data, 0, sizeof(rootinfo_data));
+ rootinfo_key.data = ROOTINFO_KEY;
+ rootinfo_key.size = ROOTINFO_KEYLEN;
+ switch (rc = cursor->c_get(cursor, &rootinfo_key, &rootinfo_data, DB_SET)) {
+ case 0:
+ memcpy(&hint, rootinfo_data.data, sizeof(hint));
+ id = ntohl(hint);
+ /* If we've hit the max CNID allowed, we return a fatal error. CNID
+ * needs to be recycled before proceding. */
+ if (++id == CNID_INVALID) {
+ LOG(log_error, logtype_default, "cnid_add: FATAL: CNID database has reached its limit.");
+ errno = CNID_ERR_MAX;
+ goto cleanup;
+ }
+ hint = htonl(id);
+ flag = DB_CURRENT;
+ break;
+ case DB_NOTFOUND:
+ hint = htonl(CNID_START);
+ flag = DB_KEYFIRST;
+ break;
+ default:
+ LOG(log_error, logtype_default, "cnid_add: Unable to lookup rootinfo: %s", db_strerror(rc));
+ errno = CNID_ERR_DB;
+ goto cleanup;
+ }
+
+ memset(&rootinfo_key, 0, sizeof(rootinfo_key));
+ memset(&rootinfo_data, 0, sizeof(rootinfo_data));
+ rootinfo_data.data = &hint;
+ rootinfo_data.size = sizeof(hint);
+ rootinfo_key.data = ROOTINFO_KEY;
+ rootinfo_key.size = ROOTINFO_KEYLEN;
+
+ switch (rc = cursor->c_put(cursor, &rootinfo_key, &rootinfo_data, flag)) {
+ case 0:
+ break;
+ default:
+ LOG(log_error, logtype_default, "cnid_add: Unable to update rootinfo: %s", db_strerror(rc));
+ errno = CNID_ERR_DB;
+ goto cleanup;
+ }
+ if ((rc = cursor->c_close(cursor)) != 0) {
+ LOG(log_error, logtype_default, "get_cnid: Unable to close cursor: %s", db_strerror(rc));
+ errno = CNID_ERR_DB;
+ return CNID_INVALID;
+ }
+ return hint;
+cleanup:
+ if ((rc = cursor->c_close(cursor)) != 0) {
+ LOG(log_error, logtype_default, "get_cnid: Unable to close cursor: %s", db_strerror(rc));
+ return CNID_INVALID;
+ }
+ return CNID_INVALID;
+}
+#endif /* CNID_DB_CDB */
+
+/* ------------------------ */
+cnid_t cnid_add(void *CNID, const struct stat *st,
+ const cnid_t did, const char *name, const int len,
+ cnid_t hint)
+{
+ CNID_private *db;
+ DBT key, data;
+ cnid_t id;
+ int rc;
+
+ if (!(db = CNID) || !st || !name) {
+ errno = CNID_ERR_PARAM;
+ return CNID_INVALID;
+ }
+
+ /* Do a lookup. */
+ id = cnid_lookup(db, st, did, name, len);
+ /* ... Return id if it is valid, or if Rootinfo is read-only. */
+ if (id || (db->flags & CNIDFLAG_DB_RO)) {
+#ifdef DEBUG
+ LOG(log_info, logtype_default, "cnid_add: Looked up did %u, name %s as %u", ntohl(did), name, ntohl(id));
+#endif
+ return id;
+ }
+
+ /* Initialize our DBT data structures. */
+ memset(&key, 0, sizeof(key));
+ memset(&data, 0, sizeof(data));
+
+ /* Just tickle hint, and the key will change (gotta love pointers). */
+ key.data = &hint;
+ key.size = sizeof(hint);
+
+ if ((data.data = make_cnid_data(st, did, name, len)) == NULL) {
+ LOG(log_error, logtype_default, "cnid_add: Path name is too long");
+ errno = CNID_ERR_PATH;
+ return CNID_INVALID;
+ }
+
+ data.size = CNID_HEADER_LEN + len + 1;
+
+ /* Start off with the hint. It should be in network byte order.
+ * We need to make sure that somebody doesn't add in restricted
+ * cnid's to the database. */
+ if (ntohl(hint) >= CNID_START) {
+ /* If the key doesn't exist, add it in. Don't fiddle with nextID. */
+ rc = add_cnid(db, &key, &data);
+ switch (rc) {
+ case DB_KEYEXIST: /* Need to use RootInfo after all. */
+ break;
+ default:
+ LOG(log_error, logtype_default, "cnid_add: Unable to add CNID %u: %s", ntohl(hint), db_strerror(rc));
+ errno = CNID_ERR_DB;
+ return CNID_INVALID;
+ case 0:
+#ifdef DEBUG
+ LOG(log_info, logtype_default, "cnid_add: Used hint for did %u, name %s as %u", ntohl(did), name, ntohl(hint));
+#endif
+ return hint;
+ }
+ }
+ hint = get_cnid(db);
+ if (hint == 0) {
+ errno = CNID_ERR_DB;
+ return CNID_INVALID;
+ }
+
/* Now we need to add the CNID data to the databases. */
rc = add_cnid(db, &key, &data);
if (rc) {
#endif
return hint;
-
-cleanup_abort:
-#ifndef CNID_DB_CDB
- txn_abort(tid);
-#endif /* CNID_DB_CDB */
-
- errno = CNID_ERR_DB;
- return CNID_INVALID;
}
#endif /* CNID_DB */
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