libatalk/cnid/cnid_delete.c

   1 /*
   2  * $Id: cnid_delete.c,v 1.9 2001-10-22 03:40:19 jmarcus Exp $
   3  *
   4  * Copyright (c) 1999. Adrian Sun (asun@zoology.washington.edu)
   5  * All Rights Reserved. See COPYRIGHT.
   6  *
   7  * cnid_delete: delete a CNID from the database
   8  */
   9
  10 #ifdef HAVE_CONFIG_H
  11 #include "config.h"
  12 #endif /* HAVE_CONFIG_H */
  13
  14 #ifdef CNID_DB
  15 #include <stdio.h>
  16 #include <string.h>
  17 #include <errno.h>
  18 #include <syslog.h>
  19
  20 #include <db.h>
  21 #include <netatalk/endian.h>
  22 #include <atalk/adouble.h>
  23 #include <atalk/cnid.h>
  24
  25 #include "cnid_private.h"
  26
  27 int cnid_delete(void *CNID, const cnid_t id) {
  28         CNID_private *db;
  29         DBT key, data;
  30         DB_TXN *tid;
  31         int rc;
  32
  33         if (!(db = CNID) || !id || (db->flags & CNIDFLAG_DB_RO)) {
  34                 return -1;
  35         }
  36
  37         memset(&key, 0, sizeof(key));
  38         memset(&data, 0, sizeof(data));
  39
  40 retry:
  41         if ((rc = txn_begin(db->dbenv, NULL, &tid, 0)) != 0) {
  42                 syslog(LOG_ERR, "cnid_delete: Failed to begin transaction: %s",
  43                        db_strerror(rc));
  44                 return rc;
  45         }
  46
  47         /* Get from ain CNID database. */
  48         key.data = (cnid_t *)&id;
  49         key.size = sizeof(id);
  50         if ((rc = db->db_cnid->get(db->db_cnid, tid, &key, &data, DB_RMW))) {
  51                 int ret;
  52                 if ((ret = txn_abort(tid)) != 0) {
  53                         syslog(LOG_ERR, "cnid_delete: txn_abort: %s", db_strerror(ret));
  54                         return ret;
  55                 }
  56                 switch (rc) {
  57                         case DB_LOCK_DEADLOCK:
  58                                 goto retry;
  59                         case DB_NOTFOUND:
  60                                 syslog(LOG_INFO, "cnid_delete: CNID %u not in database",
  61                                        ntohl(id));
  62                                 return 0;
  63                         default:
  64                                 syslog(LOG_ERR, "cnid_delete: Unable to delete entry: %s",
  65                                        db_strerror(rc));
  66                                 return rc;
  67                 }
  68         }
  69
  70         /* Now delete from dev/ino database. */
  71         key.data = data.data;
  72         key.size = CNID_DEVINO_LEN;
  73         if ((rc = db->db_devino->del(db->db_devino, tid, &key, 0))) {
  74                 switch (rc) {
  75                         case DB_LOCK_DEADLOCK:
  76                                 if ((rc = txn_abort(tid)) != 0) {
  77                                         syslog(LOG_ERR, "cnid_delete: txn_abort: %s",
  78                                                db_strerror(rc));
  79                                         return rc;
  80                                 }
  81                                 goto retry;
  82                         case DB_NOTFOUND:
  83                                 /* Quietly fall through if the entry isn't found. */
  84                                 break;
  85                         default:
  86                                 if ((rc = txn_abort(tid)) != 0) {
  87                                         syslog(LOG_ERR, "cnid_delete: txn_abort: %s",
  88                                                db_strerror(rc));
  89                                         return rc;
  90                                 }
  91                                 goto abort_err;
  92                 }
  93         }
  94
  95         /* Get data from the did/name database.
  96          * TODO Also handle did/macname, did/shortname, and did/longname. */
  97
  98         key.data = (char *)data.data + CNID_DEVINO_LEN;
  99         key.size = data.size - CNID_DEVINO_LEN;
 100         if ((rc = db->db_didname->del(db->db_didname, tid, &key, 0))) {
 101                 switch (rc) {
 102                         case DB_LOCK_DEADLOCK:
 103                                 if ((rc = txn_abort(tid)) != 0) {
 104                                         syslog(LOG_ERR, "cnid_delete: txn_abort: %s",
 105                                                db_strerror(rc));
 106                                         return rc;
 107                                 }
 108                                 goto retry;
 109                         case DB_NOTFOUND:
 110                                 break;
 111                         default:
 112                                 if ((rc = txn_abort(tid)) != 0) {
 113                                         syslog(LOG_ERR, "cnid_delete: txn_abort: %s",
 114                                                db_strerror(rc));
 115                                         return rc;
 116                                 }
 117                                 goto abort_err;
 118                 }
 119         }
 120
 121         /* Now delete from the main CNID database. */
 122         key.data = (cnid_t *)&id;
 123         key.size = sizeof(id);
 124         if ((rc = db->db_cnid->del(db->db_cnid, tid, &key, 0))) {
 125                 int ret;
 126                 if ((ret = txn_abort(tid)) != 0) {
 127                         syslog(LOG_ERR, "cnid_delete: txn_abort: %s", db_strerror(ret));
 128                         return ret;
 129                 }
 130                 switch (rc) {
 131                         case DB_LOCK_DEADLOCK:
 132                                 goto retry;
 133                         default:
 134                                 goto abort_err;
 135                 }
 136         }
 137
 138 #ifdef DEBUG
 139         syslog(LOG_INFO, "cnid_delete: Deleting CNID %u", ntohl(id));
 140 #endif
 141         if ((rc = txn_commit(tid, 0)) != 0) {
 142                 syslog(LOG_ERR, "cnid_delete: Failed to commit transaction: %s",
 143                        db_strerror(rc));
 144                 return rc;
 145         }
 146         return 0;
 147
 148 abort_err:
 149         syslog(LOG_ERR, "cnid_delete: Unable to delete CNID %u: %s",
 150                ntohl(id), db_strerror(rc));
 151         return rc;
 152 }
 153 #endif /*CNID_DB */