2 * $Id: dbd_lookup.c,v 1.2 2005-04-28 20:49:48 bfernhomberg Exp $
4 * Copyright (C) Joerg Lenneis 2003
5 * All Rights Reserved. See COPYING.
10 #endif /* HAVE_CONFIG_H */
15 #include <sys/param.h>
17 #include <netatalk/endian.h>
18 #include <atalk/logger.h>
19 #include <atalk/cnid_dbd_private.h>
26 * This returns the CNID corresponding to a particular file. It will also fix
27 * up the database if there's a problem.
30 int dbd_lookup(struct cnid_dbd_rqst *rqst, struct cnid_dbd_rply *rply)
33 DBT key, devdata, diddata;
34 char dev[CNID_DEV_LEN];
35 char ino[CNID_INO_LEN];
36 int devino = 1, didname = 1;
38 cnid_t id_devino, id_didname;
39 u_int32_t type_devino = (unsigned)-1;
40 u_int32_t type_didname = (unsigned)-1;
44 memset(&key, 0, sizeof(key));
45 memset(&diddata, 0, sizeof(diddata));
46 memset(&devdata, 0, sizeof(devdata));
51 buf = pack_cnid_data(rqst);
52 memcpy(dev, buf + CNID_DEV_OFS, CNID_DEV_LEN);
53 /* FIXME: ino is not needed later on, remove? */
54 memcpy(ino, buf + CNID_INO_OFS, CNID_INO_LEN);
56 /* Look for a CNID. We have two options: dev/ino or did/name. If we
57 only get a match in one of them, that means a file has moved. */
58 key.data = buf +CNID_DEVINO_OFS;
59 key.size = CNID_DEVINO_LEN;
61 if ((rc = dbif_get(DBIF_IDX_DEVINO, &key, &devdata, 0)) < 0) {
62 LOG(log_error, logtype_cnid, "dbd_lookup: Unable to get CNID %u, name %s",
63 ntohl(rqst->did), rqst->name);
64 rply->result = CNID_DBD_RES_ERR_DB;
71 memcpy(&id_devino, devdata.data, sizeof(rply->cnid));
72 memcpy(&type_devino, (char *)devdata.data +CNID_TYPE_OFS, sizeof(type_devino));
73 type_devino = ntohl(type_devino);
76 /* FIXME: This second call to pack_cnid_data() is redundant, any reason it is here? */
77 buf = pack_cnid_data(rqst);
78 key.data = buf +CNID_DID_OFS;
79 key.size = CNID_DID_LEN + rqst->namelen + 1;
81 if ((rc = dbif_get(DBIF_IDX_DIDNAME, &key, &diddata, 0)) < 0) {
82 LOG(log_error, logtype_cnid, "dbd_lookup: Unable to get CNID %u, name %s",
83 ntohl(rqst->did), rqst->name);
84 rply->result = CNID_DBD_RES_ERR_DB;
91 memcpy(&id_didname, diddata.data, sizeof(rply->cnid));
92 memcpy(&type_didname, (char *)diddata.data +CNID_TYPE_OFS, sizeof(type_didname));
93 type_didname = ntohl(type_didname);
96 if (!devino && !didname) {
99 LOG(log_info, logtype_cnid, "cnid_lookup: dev/ino %s did %u name %s neither in devino nor didname",
100 stringify_devino(rqst->dev, rqst->ino), ntohl(rqst->did), rqst->name);
102 rply->result = CNID_DBD_RES_NOTFOUND;
106 if (devino && didname && id_devino == id_didname && type_devino == rqst->type) {
109 LOG(log_info, logtype_cnid, "cnid_lookup: Looked up dev/ino %s did %u name %s as %u",
110 stringify_devino(rqst->dev, rqst->ino), ntohl(rqst->did), rqst->name, ntohl(id_didname));
112 rply->cnid = id_didname;
113 rply->result = CNID_DBD_RES_OK;
118 rqst->cnid = id_didname;
119 /* we have a did:name
120 * if it's the same dev or not the same type
123 if (!memcmp(dev, (char *)diddata.data + CNID_DEV_OFS, CNID_DEV_LEN) ||
124 type_didname != rqst->type) {
125 if (dbd_delete(rqst, rply) < 0) {
135 rqst->cnid = id_devino;
136 if (type_devino != rqst->type) {
137 /* same dev:inode but not same type one is a folder the other
138 * is a file,it's an inode reused, delete the record
140 if (dbd_delete(rqst, rply) < 0) {
149 rply->result = CNID_DBD_RES_NOTFOUND;
152 /* Fix up the database. assume it was a file move and rename */
153 rc = dbd_update(rqst, rply);
155 rply->cnid = rqst->cnid;
158 LOG(log_info, logtype_cnid, "cnid_lookup: Looked up dev/ino %s did %u name %s as %u (needed update)",
159 stringify_devino(rqst->dev, rqst->ino), ntohl(rqst->did), rqst->name, ntohl(rply->cnid));