2 * Copyright (c) 1999. Adrian Sun (asun@zoology.washington.edu)
3 * All Rights Reserved. See COPYRIGHT.
11 #ifdef CNID_BACKEND_TDB
13 #include <atalk/util.h>
14 #include <sys/param.h>
15 #include <sys/types.h>
18 #include <atalk/logger.h>
20 static void make_devino_data(unsigned char *buf, dev_t dev, ino_t ino)
22 buf[CNID_DEV_LEN - 1] = dev; dev >>= 8;
23 buf[CNID_DEV_LEN - 2] = dev; dev >>= 8;
24 buf[CNID_DEV_LEN - 3] = dev; dev >>= 8;
25 buf[CNID_DEV_LEN - 4] = dev; dev >>= 8;
26 buf[CNID_DEV_LEN - 5] = dev; dev >>= 8;
27 buf[CNID_DEV_LEN - 6] = dev; dev >>= 8;
28 buf[CNID_DEV_LEN - 7] = dev; dev >>= 8;
29 buf[CNID_DEV_LEN - 8] = dev;
31 buf[CNID_DEV_LEN + CNID_INO_LEN - 1] = ino; ino >>= 8;
32 buf[CNID_DEV_LEN + CNID_INO_LEN - 2] = ino; ino >>= 8;
33 buf[CNID_DEV_LEN + CNID_INO_LEN - 3] = ino; ino >>= 8;
34 buf[CNID_DEV_LEN + CNID_INO_LEN - 4] = ino; ino >>= 8;
35 buf[CNID_DEV_LEN + CNID_INO_LEN - 5] = ino; ino >>= 8;
36 buf[CNID_DEV_LEN + CNID_INO_LEN - 6] = ino; ino >>= 8;
37 buf[CNID_DEV_LEN + CNID_INO_LEN - 7] = ino; ino >>= 8;
38 buf[CNID_DEV_LEN + CNID_INO_LEN - 8] = ino;
41 unsigned char *make_tdb_data(u_int32_t flags, const struct stat *st,const cnid_t did,
42 const char *name, const size_t len)
44 static unsigned char start[CNID_HEADER_LEN + MAXPATHLEN + 1];
45 unsigned char *buf = start +CNID_LEN;
51 make_devino_data(buf, !(flags & CNID_FLAG_NODEV)?st->st_dev:0, st->st_ino);
52 buf += CNID_DEVINO_LEN;
54 i = S_ISDIR(st->st_mode)?1:0;
56 memcpy(buf, &i, sizeof(i));
59 /* did is already in network byte order */
60 memcpy(buf, &did, sizeof(did));
63 memcpy(buf, name, len);
69 /* add an entry to the CNID databases. we do this as a transaction
70 * to prevent messiness.
74 static int add_cnid (struct _cnid_tdb_private *db, TDB_DATA *key, TDB_DATA *data) {
75 TDB_DATA altkey, altdata;
77 memset(&altkey, 0, sizeof(altkey));
78 memset(&altdata, 0, sizeof(altdata));
82 if (tdb_store(db->tdb_cnid, *key, *data, TDB_REPLACE)) {
86 /* dev/ino database */
87 altkey.dptr = data->dptr +CNID_DEVINO_OFS;
88 altkey.dsize = CNID_DEVINO_LEN;
89 altdata.dptr = key->dptr;
90 altdata.dsize = key->dsize;
91 if (tdb_store(db->tdb_devino, altkey, altdata, TDB_REPLACE)) {
95 /* did/name database */
96 altkey.dptr = (char *) data->dptr +CNID_DID_OFS;
97 altkey.dsize = data->dsize -CNID_DID_OFS;
98 if (tdb_store(db->tdb_didname, altkey, altdata, TDB_REPLACE)) {
107 /* ----------------------- */
108 static cnid_t get_cnid(struct _cnid_tdb_private *db)
110 TDB_DATA rootinfo_key, data;
113 memset(&rootinfo_key, 0, sizeof(rootinfo_key));
114 memset(&data, 0, sizeof(data));
115 rootinfo_key.dptr = ROOTINFO_KEY;
116 rootinfo_key.dsize = ROOTINFO_KEYLEN;
118 tdb_chainlock(db->tdb_didname, rootinfo_key);
119 data = tdb_fetch(db->tdb_didname, rootinfo_key);
122 memcpy(&hint, data.dptr, sizeof(cnid_t));
125 /* If we've hit the max CNID allowed, we return a fatal error. CNID
126 * needs to be recycled before proceding. */
127 if (++id == CNID_INVALID) {
128 LOG(log_error, logtype_default, "cnid_add: FATAL: CNID database has reached its limit.");
129 errno = CNID_ERR_MAX;
135 hint = htonl(CNID_START);
138 memset(&data, 0, sizeof(data));
139 data.dptr = (char *)&hint;
140 data.dsize = sizeof(hint);
141 if (tdb_store(db->tdb_didname, rootinfo_key, data, TDB_REPLACE)) {
145 tdb_chainunlock(db->tdb_didname, rootinfo_key );
148 tdb_chainunlock(db->tdb_didname, rootinfo_key);
153 /* ------------------------ */
154 cnid_t cnid_tdb_add(struct _cnid_db *cdb, const struct stat *st,
155 cnid_t did, const char *name, size_t len, cnid_t hint)
157 const struct stat *lstp;
159 struct _cnid_tdb_private *priv;
163 if (!cdb || !(priv = cdb->_private) || !st || !name) {
164 errno = CNID_ERR_PARAM;
168 id = cnid_tdb_lookup(cdb, st, did, name, len);
169 /* ... Return id if it is valid, or if Rootinfo is read-only. */
170 if (id || (priv->flags & CNIDFLAG_DB_RO)) {
176 lstp = lstat(name, &lst) < 0 ? st : &lst;
180 /* Initialize our DBT data structures. */
181 memset(&key, 0, sizeof(key));
182 memset(&data, 0, sizeof(data));
184 key.dptr = (char *)&hint;
185 key.dsize = sizeof(cnid_t);
186 if ((data.dptr = make_tdb_data(cdb->flags, lstp, did, name, len)) == NULL) {
187 LOG(log_error, logtype_default, "tdb_add: Path name is too long");
188 errno = CNID_ERR_PATH;
191 data.dsize = CNID_HEADER_LEN + len + 1;
192 hint = get_cnid(priv);
197 memcpy(data.dptr, &hint, sizeof(hint));
199 /* Now we need to add the CNID data to the databases. */
200 rc = add_cnid(priv, &key, &data);
202 LOG(log_error, logtype_default, "tdb_add: Failed to add CNID for %s to database using hint %u", name, ntohl(hint));