2 Unix SMB/CIFS implementation.
3 Database interface wrapper
4 Copyright (C) Jim McDonough <jmcd@us.ibm.com> 2006
6 Major code contributions from Aleksey Fedoseev (fedoseev@ru.ibm.com)
8 This program is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 3 of the License, or
11 (at your option) any later version.
13 This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with this program. If not, see <http://www.gnu.org/licenses/>.
23 #ifdef CLUSTER_SUPPORT
24 #include "ctdb_private.h"
27 * Fall back using fetch_locked if no genuine fetch operation is provided
30 static int dbwrap_fallback_fetch(struct db_context *db, TALLOC_CTX *mem_ctx,
31 TDB_DATA key, TDB_DATA *data)
33 struct db_record *rec;
35 if (!(rec = db->fetch_locked(db, mem_ctx, key))) {
39 data->dsize = rec->value.dsize;
40 data->dptr = talloc_move(mem_ctx, &rec->value.dptr);
46 * If you need transaction support use db_open_trans()
48 struct db_context *db_open(TALLOC_CTX *mem_ctx,
50 int hash_size, int tdb_flags,
51 int open_flags, mode_t mode)
53 struct db_context *result = NULL;
54 #ifdef CLUSTER_SUPPORT
55 const char *sockname = lp_ctdbd_socket();
58 #ifdef CLUSTER_SUPPORT
59 if(!sockname || !*sockname) {
63 if (lp_clustering()) {
66 if (!socket_exist(sockname)) {
67 DEBUG(1, ("ctdb socket does not exist - is ctdb not "
72 /* ctdb only wants the file part of the name */
73 partname = strrchr(name, '/');
79 /* allow ctdb for individual databases to be disabled */
80 if (lp_parm_bool(-1, "ctdb", partname, True)) {
81 result = db_open_ctdb(mem_ctx, partname, hash_size,
82 tdb_flags, open_flags, mode);
84 DEBUG(0,("failed to attach to ctdb %s\n",
94 result = db_open_tdb(mem_ctx, name, hash_size,
95 tdb_flags, open_flags, mode);
98 if ((result != NULL) && (result->fetch == NULL)) {
99 result->fetch = dbwrap_fallback_fetch;
106 * If you use this you can only modify with a transaction
108 struct db_context *db_open_trans(TALLOC_CTX *mem_ctx,
110 int hash_size, int tdb_flags,
111 int open_flags, mode_t mode)
113 bool use_tdb2 = lp_parm_bool(-1, "dbwrap", "use_tdb2", false);
114 #ifdef CLUSTER_SUPPORT
115 const char *sockname = lp_ctdbd_socket();
118 if (tdb_flags & TDB_CLEAR_IF_FIRST) {
119 DEBUG(0,("db_open_trans: called with TDB_CLEAR_IF_FIRST: %s\n",
124 #ifdef CLUSTER_SUPPORT
125 if(!sockname || !*sockname) {
126 sockname = CTDB_PATH;
129 if (lp_clustering()) {
130 const char *partname;
132 if (!socket_exist(sockname)) {
133 DEBUG(1, ("ctdb socket does not exist - is ctdb not "
138 /* ctdb only wants the file part of the name */
139 partname = strrchr(name, '/');
145 /* allow ctdb for individual databases to be disabled */
146 if (lp_parm_bool(-1, "ctdb", partname, true)) {
147 struct db_context *result = NULL;
148 result = db_open_ctdb(mem_ctx, partname, hash_size,
149 tdb_flags, open_flags, mode);
150 if (result == NULL) {
151 DEBUG(0,("failed to attach to ctdb %s\n",
160 const char *partname;
161 /* tdb2 only wants the file part of the name */
162 partname = strrchr(name, '/');
168 /* allow ctdb for individual databases to be disabled */
169 if (lp_parm_bool(-1, "tdb2", partname, true)) {
170 return db_open_tdb2(mem_ctx, partname, hash_size,
171 tdb_flags, open_flags, mode);
175 return db_open_tdb(mem_ctx, name, hash_size,
176 tdb_flags, open_flags, mode);
179 NTSTATUS dbwrap_delete_bystring(struct db_context *db, const char *key)
181 struct db_record *rec;
184 rec = db->fetch_locked(db, talloc_tos(), string_term_tdb_data(key));
186 return NT_STATUS_NO_MEMORY;
188 status = rec->delete_rec(rec);
193 NTSTATUS dbwrap_store_bystring(struct db_context *db, const char *key,
194 TDB_DATA data, int flags)
196 struct db_record *rec;
199 rec = db->fetch_locked(db, talloc_tos(), string_term_tdb_data(key));
201 return NT_STATUS_NO_MEMORY;
204 status = rec->store(rec, data, flags);
209 TDB_DATA dbwrap_fetch_bystring(struct db_context *db, TALLOC_CTX *mem_ctx,
214 if (db->fetch(db, mem_ctx, string_term_tdb_data(key), &result) == -1) {
215 return make_tdb_data(NULL, 0);