2 * $Id: cnid_tdb_add.c,v 1.2 2005-04-28 20:50:02 bfernhomberg 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;
28 memset(&altkey, 0, sizeof(altkey));
29 memset(&altdata, 0, sizeof(altdata));
33 if (tdb_store(db->tdb_cnid, *key, *data, TDB_REPLACE)) {
37 /* dev/ino database */
38 altkey.dptr = data->dptr;
39 altkey.dsize = TDB_DEVINO_LEN;
40 altdata.dptr = key->dptr;
41 altdata.dsize = key->dsize;
42 if (tdb_store(db->tdb_devino, altkey, altdata, TDB_REPLACE)) {
46 /* did/name database */
47 altkey.dptr = (char *) data->dptr + TDB_DEVINO_LEN;
48 altkey.dsize = data->dsize - TDB_DEVINO_LEN;
49 if (tdb_store(db->tdb_didname, altkey, altdata, TDB_REPLACE)) {
58 /* ----------------------- */
59 static cnid_t get_cnid(struct _cnid_tdb_private *db)
61 TDB_DATA rootinfo_key, data;
64 memset(&rootinfo_key, 0, sizeof(rootinfo_key));
65 memset(&data, 0, sizeof(data));
66 rootinfo_key.dptr = ROOTINFO_KEY;
67 rootinfo_key.dsize = ROOTINFO_KEYLEN;
69 tdb_chainlock(db->tdb_didname, rootinfo_key);
70 data = tdb_fetch(db->tdb_didname, rootinfo_key);
73 memcpy(&hint, data.dptr, sizeof(cnid_t));
76 /* If we've hit the max CNID allowed, we return a fatal error. CNID
77 * needs to be recycled before proceding. */
78 if (++id == CNID_INVALID) {
79 LOG(log_error, logtype_default, "cnid_add: FATAL: CNID database has reached its limit.");
86 hint = htonl(TDB_START);
89 memset(&data, 0, sizeof(data));
90 data.dptr = (char *)&hint;
91 data.dsize = sizeof(hint);
92 if (tdb_store(db->tdb_didname, rootinfo_key, data, TDB_REPLACE)) {
96 tdb_chainunlock(db->tdb_didname, rootinfo_key );
99 tdb_chainunlock(db->tdb_didname, rootinfo_key);
104 /* ------------------------ */
105 cnid_t cnid_tdb_add(struct _cnid_db *cdb, const struct stat *st,
106 const cnid_t did, char *name, const int len, cnid_t hint)
108 const struct stat *lstp;
110 struct _cnid_tdb_private *priv;
114 if (!cdb || !(priv = cdb->_private) || !st || !name) {
115 errno = CNID_ERR_PARAM;
119 id = cnid_tdb_lookup(cdb, st, did, name, len);
120 /* ... Return id if it is valid, or if Rootinfo is read-only. */
121 if (id || (priv->flags & TDBFLAG_DB_RO)) {
127 lstp = lstat(name, &lst) < 0 ? st : &lst;
131 /* Initialize our DBT data structures. */
132 memset(&key, 0, sizeof(key));
133 memset(&data, 0, sizeof(data));
135 key.dptr = (char *)&hint;
136 key.dsize = sizeof(cnid_t);
137 if ((data.dptr = make_tdb_data(lstp, did, name, len)) == NULL) {
138 LOG(log_error, logtype_default, "tdb_add: Path name is too long");
139 errno = CNID_ERR_PATH;
142 data.dsize = TDB_HEADER_LEN + len + 1;
143 hint = get_cnid(priv);
149 /* Now we need to add the CNID data to the databases. */
150 rc = add_cnid(priv, &key, &data);
152 LOG(log_error, logtype_default, "tdb_add: Failed to add CNID for %s to database using hint %u", name, ntohl(hint));