2 * $Id: cnid_tdb_add.c,v 1.1.2.1.2.1 2005-01-30 20:56:23 didg Exp $
4 * Copyright (c) 1999. Adrian Sun (asun@zoology.washington.edu)
5 * All Rights Reserved. See COPYRIGHT.
13 #ifdef CNID_BACKEND_TDB
15 #include <atalk/util.h>
16 #include <sys/param.h>
17 #include <sys/types.h>
20 #include <atalk/logger.h>
22 /* add an entry to the CNID databases. we do this as a transaction
23 * to prevent messiness. */
25 static int add_cnid (struct _cnid_tdb_private *db, TDB_DATA *key, TDB_DATA *data) {
26 TDB_DATA altkey, altdata;
29 memset(&altkey, 0, sizeof(altkey));
30 memset(&altdata, 0, sizeof(altdata));
34 if (tdb_store(db->tdb_cnid, *key, *data, TDB_REPLACE)) {
38 /* dev/ino database */
39 altkey.dptr = data->dptr;
40 altkey.dsize = TDB_DEVINO_LEN;
41 altdata.dptr = key->dptr;
42 altdata.dsize = key->dsize;
43 if (tdb_store(db->tdb_devino, altkey, altdata, TDB_REPLACE)) {
47 /* did/name database */
48 altkey.dptr = (char *) data->dptr + TDB_DEVINO_LEN;
49 altkey.dsize = data->dsize - TDB_DEVINO_LEN;
50 if (tdb_store(db->tdb_didname, altkey, altdata, TDB_REPLACE)) {
59 /* ----------------------- */
60 static cnid_t get_cnid(struct _cnid_tdb_private *db)
62 TDB_DATA rootinfo_key, data;
65 memset(&rootinfo_key, 0, sizeof(rootinfo_key));
66 memset(&data, 0, sizeof(data));
67 rootinfo_key.dptr = ROOTINFO_KEY;
68 rootinfo_key.dsize = ROOTINFO_KEYLEN;
70 tdb_chainlock(db->tdb_didname, rootinfo_key);
71 data = tdb_fetch(db->tdb_didname, rootinfo_key);
74 memcpy(&hint, data.dptr, sizeof(cnid_t));
77 /* If we've hit the max CNID allowed, we return a fatal error. CNID
78 * needs to be recycled before proceding. */
79 if (++id == CNID_INVALID) {
80 LOG(log_error, logtype_default, "cnid_add: FATAL: CNID database has reached its limit.");
87 hint = htonl(TDB_START);
90 memset(&data, 0, sizeof(data));
91 data.dptr = (char *)&hint;
92 data.dsize = sizeof(hint);
93 if (tdb_store(db->tdb_didname, rootinfo_key, data, TDB_REPLACE)) {
97 tdb_chainunlock(db->tdb_didname, rootinfo_key );
100 tdb_chainunlock(db->tdb_didname, rootinfo_key);
105 /* ------------------------ */
106 cnid_t cnid_tdb_add(struct _cnid_db *cdb, const struct stat *st,
107 const cnid_t did, char *name, const int len, cnid_t hint)
109 const struct stat *lstp;
111 struct _cnid_tdb_private *priv;
115 if (!cdb || !(priv = cdb->_private) || !st || !name) {
116 errno = CNID_ERR_PARAM;
120 id = cnid_tdb_lookup(cdb, st, did, name, len);
121 /* ... Return id if it is valid, or if Rootinfo is read-only. */
122 if (id || (priv->flags & TDBFLAG_DB_RO)) {
128 lstp = lstat(name, &lst) < 0 ? st : &lst;
132 /* Initialize our DBT data structures. */
133 memset(&key, 0, sizeof(key));
134 memset(&data, 0, sizeof(data));
136 key.dptr = (char *)&hint;
137 key.dsize = sizeof(cnid_t);
138 if ((data.dptr = make_tdb_data(lstp, did, name, len)) == NULL) {
139 LOG(log_error, logtype_default, "tdb_add: Path name is too long");
140 errno = CNID_ERR_PATH;
143 data.dsize = TDB_HEADER_LEN + len + 1;
144 hint = get_cnid(priv);
150 /* Now we need to add the CNID data to the databases. */
151 rc = add_cnid(priv, &key, &data);
153 LOG(log_error, logtype_default, "tdb_add: Failed to add CNID for %s to database using hint %u", name, ntohl(hint));