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() && socket_exist(sockname)) {
65 /* ctdb only wants the file part of the name */
66 partname = strrchr(name, '/');
72 /* allow ctdb for individual databases to be disabled */
73 if (lp_parm_bool(-1, "ctdb", partname, True)) {
74 result = db_open_ctdb(mem_ctx, partname, hash_size,
75 tdb_flags, open_flags, mode);
77 DEBUG(0,("failed to attach to ctdb %s\n",
79 smb_panic("failed to attach to a ctdb "
88 result = db_open_tdb(mem_ctx, name, hash_size,
89 tdb_flags, open_flags, mode);
92 if ((result != NULL) && (result->fetch == NULL)) {
93 result->fetch = dbwrap_fallback_fetch;
100 * If you use this you can only modify with a transaction
102 struct db_context *db_open_trans(TALLOC_CTX *mem_ctx,
104 int hash_size, int tdb_flags,
105 int open_flags, mode_t mode)
107 bool use_tdb2 = lp_parm_bool(-1, "dbwrap", "use_tdb2", false);
108 #ifdef CLUSTER_SUPPORT
109 const char *sockname = lp_ctdbd_socket();
112 if (tdb_flags & TDB_CLEAR_IF_FIRST) {
113 DEBUG(0,("db_open_trans: called with TDB_CLEAR_IF_FIRST: %s\n",
115 smb_panic("db_open_trans: called with TDB_CLEAR_IF_FIRST");
118 #ifdef CLUSTER_SUPPORT
119 if(!sockname || !*sockname) {
120 sockname = CTDB_PATH;
123 if (lp_clustering() && socket_exist(sockname)) {
124 const char *partname;
125 /* ctdb only wants the file part of the name */
126 partname = strrchr(name, '/');
132 /* allow ctdb for individual databases to be disabled */
133 if (lp_parm_bool(-1, "ctdb", partname, true)) {
134 result = db_open_ctdb(mem_ctx, partname, hash_size,
135 tdb_flags, open_flags, mode);
136 if (result == NULL) {
137 DEBUG(0,("failed to attach to ctdb %s\n",
139 smb_panic("failed to attach to a ctdb "
147 const char *partname;
148 /* tdb2 only wants the file part of the name */
149 partname = strrchr(name, '/');
155 /* allow ctdb for individual databases to be disabled */
156 if (lp_parm_bool(-1, "tdb2", partname, true)) {
157 return db_open_tdb2(mem_ctx, partname, hash_size,
158 tdb_flags, open_flags, mode);
162 return db_open_tdb(mem_ctx, name, hash_size,
163 tdb_flags, open_flags, mode);
166 NTSTATUS dbwrap_delete_bystring(struct db_context *db, const char *key)
168 struct db_record *rec;
171 rec = db->fetch_locked(db, talloc_tos(), string_term_tdb_data(key));
173 return NT_STATUS_NO_MEMORY;
175 status = rec->delete_rec(rec);
180 NTSTATUS dbwrap_store_bystring(struct db_context *db, const char *key,
181 TDB_DATA data, int flags)
183 struct db_record *rec;
186 rec = db->fetch_locked(db, talloc_tos(), string_term_tdb_data(key));
188 return NT_STATUS_NO_MEMORY;
191 status = rec->store(rec, data, flags);
196 TDB_DATA dbwrap_fetch_bystring(struct db_context *db, TALLOC_CTX *mem_ctx,
201 if (db->fetch(db, mem_ctx, string_term_tdb_data(key), &result) == -1) {
202 return make_tdb_data(NULL, 0);