--- /dev/null
+/*
+ * $Id: cnid_db3_add.c,v 1.2 2005-04-28 20:49:59 bfernhomberg Exp $
+ *
+ * Copyright (c) 1999. Adrian Sun (asun@zoology.washington.edu)
+ * All Rights Reserved. See COPYRIGHT.
+ *
+ * cnid_add (db, dev, ino, did, name, hint):
+ * add a name to the CNID database. we use both dev/ino and did/name
+ * to keep track of things.
+ */
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif /* HAVE_CONFIG_H */
+
+#ifdef CNID_BACKEND_DB3
+
+#include <stdio.h>
+#include <sys/param.h>
+#include <sys/stat.h>
+#include <string.h>
+#ifdef HAVE_UNISTD_H
+#include <unistd.h>
+#endif /* HAVE_UNISTD_H */
+#ifdef HAVE_FCNTL_H
+#include <fcntl.h>
+#endif /* HAVE_FCNTL_H */
+#include <errno.h>
+#include <atalk/logger.h>
+#ifdef HAVE_SYS_TIME_H
+#include <sys/time.h>
+#endif /* HAVE_SYS_TIME_H */
+
+#ifdef HAVE_DB4_DB_H
+#include <db4/db.h>
+#else
+#include <db.h>
+#endif
+#include <netatalk/endian.h>
+
+#include <atalk/adouble.h>
+#include "cnid_db3.h"
+#include <atalk/util.h>
+
+#include "cnid_db3_private.h"
+
+/* add an entry to the CNID databases. we do this as a transaction
+ * to prevent messiness. */
+static int add_cnid(CNID_private *db, DBT *key, DBT *data) {
+ DBT altkey, altdata;
+ DB_TXN *tid;
+ int rc, ret;
+
+ memset(&altkey, 0, sizeof(altkey));
+ memset(&altdata, 0, sizeof(altdata));
+
+retry:
+ if ((rc = db3_txn_begin(db->dbenv, NULL, &tid, 0)) != 0) {
+ return rc;
+ }
+
+ /* main database */
+ if ((rc = db->db_cnid->put(db->db_cnid, tid, key, data, DB_NOOVERWRITE))) {
+ if (rc == DB_LOCK_DEADLOCK) {
+ if ((ret = db3_txn_abort(tid)) != 0) {
+ return ret;
+ }
+ goto retry;
+ }
+ goto abort;
+ }
+
+ /* dev/ino database */
+ altkey.data = data->data;
+ altkey.size = CNID_DEVINO_LEN;
+ altdata.data = key->data;
+ altdata.size = key->size;
+ if ((rc = db->db_devino->put(db->db_devino, tid, &altkey, &altdata, 0))) {
+ if (rc == DB_LOCK_DEADLOCK) {
+ if ((ret = db3_txn_abort(tid)) != 0) {
+ return ret;
+ }
+ goto retry;
+ }
+ goto abort;
+ }
+
+ /* did/name database */
+ altkey.data = (char *) data->data + CNID_DEVINO_LEN;
+ altkey.size = data->size - CNID_DEVINO_LEN;
+ if ((rc = db->db_didname->put(db->db_didname, tid, &altkey, &altdata, 0))) {
+ if (rc == DB_LOCK_DEADLOCK) {
+ if ((ret = db3_txn_abort(tid)) != 0) {
+ return ret;
+ }
+ goto retry;
+ }
+ goto abort;
+ }
+
+ if ((rc = db3_txn_commit(tid, 0)) != 0) {
+ LOG(log_error, logtype_default, "add_cnid: Failed to commit transaction: %s", db_strerror(rc));
+ return rc;
+ }
+
+ return 0;
+
+abort:
+ if ((ret = db3_txn_abort(tid)) != 0) {
+ return ret;
+ }
+ return rc;
+}
+
+/* ---------------------- */
+static cnid_t get_cnid(CNID_private *db)
+{
+ DBT rootinfo_key, rootinfo_data;
+ DB_TXN *tid;
+ int rc;
+ 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;
+
+retry:
+ if ((rc = db3_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;
+ }
+ switch (rc = db->db_didname->get(db->db_didname, tid, &rootinfo_key,
+ &rootinfo_data, DB_RMW)) {
+ case DB_LOCK_DEADLOCK:
+ if ((rc = db3_txn_abort(tid)) != 0) {
+ LOG(log_error, logtype_default, "cnid_add: txn_abort: %s", db_strerror(rc));
+ errno = CNID_ERR_DB;
+ return CNID_INVALID;
+ }
+ goto retry;
+ 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) {
+ db3_txn_abort(tid);
+ LOG(log_error, logtype_default, "cnid_add: FATAL: Cannot add CNID. CNID database has reached its limit.");
+ errno = CNID_ERR_MAX;
+ return CNID_INVALID;
+ }
+ hint = htonl(id);
+/* #ifdef DEBUG */
+#if 0
+ LOG(log_info, logtype_default, "cnid_add: Found rootinfo for did %u, name %s as %u", ntohl(did), name, ntohl(hint));
+#endif
+ break;
+ case DB_NOTFOUND:
+ hint = htonl(CNID_START);
+/* #ifdef DEBUG */
+#if 0
+ LOG(log_info, logtype_default, "cnid_add: Using CNID_START for did %u, name %s", ntohl(did), name);
+#endif
+ break;
+ default:
+ LOG(log_error, logtype_default, "cnid_add: Unable to lookup rootinfo: %s", db_strerror(rc));
+ goto cleanup_abort;
+ }
+
+ rootinfo_data.data = &hint;
+ rootinfo_data.size = sizeof(hint);
+
+ switch (rc = db->db_didname->put(db->db_didname, tid, &rootinfo_key, &rootinfo_data, 0)) {
+ case DB_LOCK_DEADLOCK:
+ if ((rc = db3_txn_abort(tid)) != 0) {
+ LOG(log_error, logtype_default, "cnid_add: txn_abort: %s", db_strerror(rc));
+ errno = CNID_ERR_DB;
+ return CNID_INVALID;
+ }
+ goto retry;
+ case 0:
+ /* The transaction finished, commit it. */
+ if ((rc = db3_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;
+ }
+ break;
+ default:
+ LOG(log_error, logtype_default, "cnid_add: Unable to update rootinfo: %s", db_strerror(rc));
+ goto cleanup_abort;
+ }
+ return hint;
+
+cleanup_abort:
+ db3_txn_abort(tid);
+ errno = CNID_ERR_DB;
+ return CNID_INVALID;
+}
+
+/* ------------------------ */
+cnid_t cnid_db3_add(struct _cnid_db *cdb, const struct stat *st,
+ const cnid_t did, char *name, const int len,
+ cnid_t hint)
+{
+ CNID_private *db;
+ DBT key, data;
+ cnid_t id;
+ int rc;
+
+ if (!cdb || !(db = cdb->_private) || !st || !name) {
+ errno = CNID_ERR_PARAM;
+ return CNID_INVALID;
+ }
+
+ /* Do a lookup. */
+ id = cnid_db3_lookup(cdb, 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) {
+ LOG(log_error, logtype_default, "cnid_add: Failed to add CNID for %s to database using hint %u: %s", name, ntohl(hint), db_strerror(rc));
+ errno = CNID_ERR_DB;
+ return CNID_INVALID;
+ }
+
+#ifdef DEBUG
+ LOG(log_info, logtype_default, "cnid_add: Returned CNID for did %u, name %s as %u", ntohl(did), name, ntohl(hint));
+#endif
+
+ return hint;
+}
+
+#endif /* CNID_BACKEND_DB3 */
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