2 * $Id: dbd_lookup.c,v 1.8 2009-05-28 10:22:07 franklahm 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(DBD *dbd, struct cnid_dbd_rqst *rqst, struct cnid_dbd_rply *rply)
33 DBT key, devdata, diddata;
34 char dev[CNID_DEV_LEN];
35 int devino = 1, didname = 1;
37 cnid_t id_devino, id_didname;
38 u_int32_t type_devino = (unsigned)-1;
39 u_int32_t type_didname = (unsigned)-1;
43 memset(&key, 0, sizeof(key));
44 memset(&diddata, 0, sizeof(diddata));
45 memset(&devdata, 0, sizeof(devdata));
50 buf = pack_cnid_data(rqst);
51 memcpy(dev, buf + CNID_DEV_OFS, CNID_DEV_LEN);
53 /* Look for a CNID. We have two options: dev/ino or did/name. If we
54 only get a match in one of them, that means a file has moved. */
55 key.data = buf + CNID_DEVINO_OFS;
56 key.size = CNID_DEVINO_LEN;
58 if ((rc = dbif_get(dbd, DBIF_IDX_DEVINO, &key, &devdata, 0)) < 0) {
59 LOG(log_error, logtype_cnid, "dbd_lookup: Unable to get CNID %u, name %s",
60 ntohl(rqst->did), rqst->name);
61 rply->result = CNID_DBD_RES_ERR_DB;
68 memcpy(&id_devino, devdata.data, sizeof(rply->cnid));
69 memcpy(&type_devino, (char *)devdata.data +CNID_TYPE_OFS, sizeof(type_devino));
70 type_devino = ntohl(type_devino);
73 key.data = buf + CNID_DID_OFS;
74 key.size = CNID_DID_LEN + rqst->namelen + 1;
76 if ((rc = dbif_get(dbd, DBIF_IDX_DIDNAME, &key, &diddata, 0)) < 0) {
77 LOG(log_error, logtype_cnid, "dbd_lookup: Unable to get CNID %u, name %s",
78 ntohl(rqst->did), rqst->name);
79 rply->result = CNID_DBD_RES_ERR_DB;
86 memcpy(&id_didname, diddata.data, sizeof(rply->cnid));
87 memcpy(&type_didname, (char *)diddata.data +CNID_TYPE_OFS, sizeof(type_didname));
88 type_didname = ntohl(type_didname);
91 if (!devino && !didname) {
94 LOG(log_debug, logtype_cnid, "cnid_lookup: dev/ino 0x%llx/0x%llx did %u name %s neither in devino nor didname",
95 (unsigned long long)rqst->dev, (unsigned long long)rqst->ino, ntohl(rqst->did), rqst->name);
97 rply->result = CNID_DBD_RES_NOTFOUND;
101 if (devino && didname && id_devino == id_didname && type_devino == rqst->type) {
104 LOG(log_debug, logtype_cnid, "cnid_lookup: Looked up dev/ino 0x%llx/0x%llx did %u name %s as %u",
105 (unsigned long long )rqst->dev, (unsigned long long )rqst->ino, ntohl(rqst->did), rqst->name, ntohl(id_didname));
107 rply->cnid = id_didname;
108 rply->result = CNID_DBD_RES_OK;
113 LOG(log_maxdebug, logtype_cnid, "CNID resolve problem: changed dev/ino for '%s'", rqst->name);
114 rqst->cnid = id_didname;
115 /* we have a did:name
116 * if it's the same dev or not the same type
119 if (!memcmp(dev, (char *)diddata.data + CNID_DEV_OFS, CNID_DEV_LEN) ||
120 type_didname != rqst->type) {
121 if (dbd_delete(dbd, rqst, rply) < 0) {
131 LOG(log_maxdebug, logtype_cnid, "CNID resolve problem: server side rename oder reused inode for '%s'", rqst->name);
132 rqst->cnid = id_devino;
133 if (type_devino != rqst->type) {
134 /* same dev:inode but not same type one is a folder the other
135 * is a file,it's an inode reused, delete the record
137 if (dbd_delete(dbd, rqst, rply) < 0) {
146 rply->result = CNID_DBD_RES_NOTFOUND;
149 /* Fix up the database. assume it was a file move and rename */
150 rc = dbd_update(dbd, rqst, rply);
152 rply->cnid = rqst->cnid;
155 LOG(log_debug, logtype_cnid, "cnid_lookup: Looked up dev/ino 0x%llx/0x%llx did %u name %s as %u (needed update)",
156 (unsigned long long)rqst->dev, (unsigned long long)rqst->ino, ntohl(rqst->did), rqst->name, ntohl(rply->cnid));