source/lib/dbwrap_util.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3    Utility functions for the dbwrap API
   4    Copyright (C) Volker Lendecke 2007
   5
   6    This program is free software; you can redistribute it and/or modify
   7    it under the terms of the GNU General Public License as published by
   8    the Free Software Foundation; either version 2 of the License, or
   9    (at your option) any later version.
  10
  11    This program is distributed in the hope that it will be useful,
  12    but WITHOUT ANY WARRANTY; without even the implied warranty of
  13    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14    GNU General Public License for more details.
  15
  16    You should have received a copy of the GNU General Public License
  17    along with this program; if not, write to the Free Software
  18    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  19 */
  20
  21 #include "includes.h"
  22
  23 int32_t dbwrap_fetch_int32(struct db_context *db, const char *keystr)
  24 {
  25         TDB_DATA dbuf;
  26         int32 ret;
  27
  28         if (db->fetch(db, NULL, string_term_tdb_data(keystr), &dbuf) != 0) {
  29                 return -1;
  30         }
  31
  32         if ((dbuf.dptr == NULL) || (dbuf.dsize != sizeof(int32_t))) {
  33                 TALLOC_FREE(dbuf.dptr);
  34                 return -1;
  35         }
  36
  37         ret = IVAL(dbuf.dptr, 0);
  38         TALLOC_FREE(dbuf.dptr);
  39         return ret;
  40 }
  41
  42 int dbwrap_store_int32(struct db_context *db, const char *keystr, int32_t v)
  43 {
  44         struct db_record *rec;
  45         int32 v_store;
  46         NTSTATUS status;
  47
  48         rec = db->fetch_locked(db, NULL, string_term_tdb_data(keystr));
  49         if (rec == NULL) {
  50                 return -1;
  51         }
  52
  53         SIVAL(&v_store, 0, v);
  54
  55         status = rec->store(rec, make_tdb_data((const uint8 *)&v_store,
  56                                                sizeof(v_store)),
  57                             TDB_REPLACE);
  58         TALLOC_FREE(rec);
  59         return NT_STATUS_IS_OK(status) ? 0 : -1;
  60 }
  61
  62 bool dbwrap_fetch_uint32(struct db_context *db, const char *keystr,
  63                          uint32_t *val)
  64 {
  65         TDB_DATA dbuf;
  66
  67         if (db->fetch(db, NULL, string_term_tdb_data(keystr), &dbuf) != 0) {
  68                 return false;
  69         }
  70
  71         if ((dbuf.dptr == NULL) || (dbuf.dsize != sizeof(uint32_t))) {
  72                 TALLOC_FREE(dbuf.dptr);
  73                 return false;
  74         }
  75
  76         *val = IVAL(dbuf.dptr, 0);
  77         TALLOC_FREE(dbuf.dptr);
  78         return true;
  79 }
  80
  81 bool dbwrap_store_uint32(struct db_context *db, const char *keystr, uint32_t v)
  82 {
  83         struct db_record *rec;
  84         uint32 v_store;
  85         NTSTATUS status;
  86
  87         rec = db->fetch_locked(db, NULL, string_term_tdb_data(keystr));
  88         if (rec == NULL) {
  89                 return false;
  90         }
  91
  92         SIVAL(&v_store, 0, v);
  93
  94         status = rec->store(rec, make_tdb_data((const uint8 *)&v_store,
  95                                                sizeof(v_store)),
  96                             TDB_REPLACE);
  97         TALLOC_FREE(rec);
  98         return NT_STATUS_IS_OK(status) ? 0 : -1;
  99 }
 100
 101 uint32_t dbwrap_change_uint32_atomic(struct db_context *db, const char *keystr,
 102                                      uint32_t *oldval, uint32_t change_val)
 103 {
 104         struct db_record *rec;
 105         uint32 val = -1;
 106         TDB_DATA data;
 107
 108         if (!(rec = db->fetch_locked(db, NULL,
 109                                      string_term_tdb_data(keystr)))) {
 110                 return -1;
 111         }
 112
 113         if ((rec->value.dptr != NULL)
 114             && (rec->value.dsize == sizeof(val))) {
 115                 val = IVAL(rec->value.dptr, 0);
 116         }
 117
 118         val += change_val;
 119
 120         data.dsize = sizeof(val);
 121         data.dptr = (uint8 *)&val;
 122
 123         rec->store(rec, data, TDB_REPLACE);
 124
 125         TALLOC_FREE(rec);
 126
 127         return 0;
 128 }
 129
 130 int32 dbwrap_change_int32_atomic(struct db_context *db, const char *keystr,
 131                                  int32 *oldval, int32 change_val)
 132 {
 133         struct db_record *rec;
 134         int32 val = -1;
 135         TDB_DATA data;
 136
 137         if (!(rec = db->fetch_locked(db, NULL,
 138                                      string_term_tdb_data(keystr)))) {
 139                 return -1;
 140         }
 141
 142         if ((rec->value.dptr != NULL)
 143             && (rec->value.dsize == sizeof(val))) {
 144                 val = IVAL(rec->value.dptr, 0);
 145         }
 146
 147         val += change_val;
 148
 149         data.dsize = sizeof(val);
 150         data.dptr = (uint8 *)&val;
 151
 152         rec->store(rec, data, TDB_REPLACE);
 153
 154         TALLOC_FREE(rec);
 155
 156         return 0;
 157 }
 158
 159 NTSTATUS dbwrap_trans_store(struct db_context *db, TDB_DATA key, TDB_DATA dbuf,
 160                             int flag)
 161 {
 162         int res;
 163         struct db_record *rec = NULL;
 164         NTSTATUS status;
 165
 166         res = db->transaction_start(db);
 167         if (res != 0) {
 168                 DEBUG(5, ("transaction_start failed\n"));
 169                 return NT_STATUS_INTERNAL_DB_CORRUPTION;
 170         }
 171
 172         rec = db->fetch_locked(db, talloc_tos(), key);
 173         if (rec == NULL) {
 174                 DEBUG(5, ("fetch_locked failed\n"));
 175                 status = NT_STATUS_NO_MEMORY;
 176                 goto cancel;
 177         }
 178
 179         status = rec->store(rec, dbuf, flag);
 180         if (!NT_STATUS_IS_OK(status)) {
 181                 DEBUG(5, ("store returned %s\n", nt_errstr(status)));
 182                 goto cancel;
 183         }
 184
 185         TALLOC_FREE(rec);
 186
 187         res = db->transaction_commit(db);
 188         if (res != 0) {
 189                 DEBUG(5, ("tdb_transaction_commit failed\n"));
 190                 status = NT_STATUS_INTERNAL_DB_CORRUPTION;
 191                 goto cancel;
 192         }
 193
 194         return NT_STATUS_OK;
 195
 196  cancel:
 197         TALLOC_FREE(rec);
 198
 199         if (db->transaction_cancel(db) != 0) {
 200                 smb_panic("Cancelling transaction failed");
 201         }
 202         return status;
 203 }
 204
 205 NTSTATUS dbwrap_trans_delete(struct db_context *db, TDB_DATA key)
 206 {
 207         int res;
 208         struct db_record *rec = NULL;
 209         NTSTATUS status;
 210
 211         res = db->transaction_start(db);
 212         if (res != 0) {
 213                 DEBUG(5, ("transaction_start failed\n"));
 214                 return NT_STATUS_INTERNAL_DB_CORRUPTION;
 215         }
 216
 217         rec = db->fetch_locked(db, talloc_tos(), key);
 218         if (rec == NULL) {
 219                 DEBUG(5, ("fetch_locked failed\n"));
 220                 status = NT_STATUS_NO_MEMORY;
 221                 goto cancel;
 222         }
 223
 224         status = rec->delete_rec(rec);
 225         if (!NT_STATUS_IS_OK(status)) {
 226                 DEBUG(5, ("delete_rec returned %s\n", nt_errstr(status)));
 227                 goto cancel;
 228         }
 229
 230         TALLOC_FREE(rec);
 231
 232         res = db->transaction_commit(db);
 233         if (res != 0) {
 234                 DEBUG(5, ("tdb_transaction_commit failed\n"));
 235                 status = NT_STATUS_INTERNAL_DB_CORRUPTION;
 236                 goto cancel;
 237         }
 238
 239         return NT_STATUS_OK;
 240
 241  cancel:
 242         TALLOC_FREE(rec);
 243
 244         if (db->transaction_cancel(db) != 0) {
 245                 smb_panic("Cancelling transaction failed");
 246         }
 247         return status;
 248 }
 249
 250 NTSTATUS dbwrap_trans_store_int32(struct db_context *db, const char *keystr,
 251                                   int32_t v)
 252 {
 253         int32 v_store;
 254
 255         SIVAL(&v_store, 0, v);
 256
 257         return dbwrap_trans_store(db, string_term_tdb_data(keystr),
 258                                   make_tdb_data((const uint8 *)&v_store,
 259                                                 sizeof(v_store)),
 260                                   TDB_REPLACE);
 261 }
 262
 263 NTSTATUS dbwrap_trans_store_uint32(struct db_context *db, const char *keystr,
 264                                    uint32_t v)
 265 {
 266         uint32 v_store;
 267
 268         SIVAL(&v_store, 0, v);
 269
 270         return dbwrap_trans_store(db, string_term_tdb_data(keystr),
 271                                   make_tdb_data((const uint8 *)&v_store,
 272                                                 sizeof(v_store)),
 273                                   TDB_REPLACE);
 274 }
 275
 276 NTSTATUS dbwrap_trans_store_bystring(struct db_context *db, const char *key,
 277                                      TDB_DATA data, int flags)
 278 {
 279         return dbwrap_trans_store(db, string_term_tdb_data(key), data, flags);
 280 }
 281
 282 NTSTATUS dbwrap_trans_delete_bystring(struct db_context *db, const char *key)
 283 {
 284         return dbwrap_trans_delete(db, string_term_tdb_data(key));
 285 }