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/*
Unix SMB/CIFS implementation.
Database interface wrapper
Copyright (C) Volker Lendecke 2005-2007
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include "includes.h"
#include "dbwrap/dbwrap.h"
#include "dbwrap/dbwrap_private.h"
#include "dbwrap/dbwrap_open.h"
#include "dbwrap/dbwrap_tdb.h"
#include "dbwrap/dbwrap_ctdb.h"
#include "lib/param/param.h"
#include "util_tdb.h"
#ifdef CLUSTER_SUPPORT
#include "ctdb_private.h"
#endif
bool db_is_local(const char *name)
{
#ifdef CLUSTER_SUPPORT
const char *sockname = lp_ctdbd_socket();
if (lp_clustering() && socket_exist(sockname)) {
const char *partname;
/* ctdb only wants the file part of the name */
partname = strrchr(name, '/');
if (partname) {
partname++;
} else {
partname = name;
}
/* allow ctdb for individual databases to be disabled */
if (lp_parm_bool(-1, "ctdb", partname, True)) {
return false;
}
}
#endif
return true;
}
/**
* open a database
*/
struct db_context *db_open(TALLOC_CTX *mem_ctx,
const char *name,
int hash_size, int tdb_flags,
int open_flags, mode_t mode,
enum dbwrap_lock_order lock_order,
uint64_t dbwrap_flags)
{
struct db_context *result = NULL;
#ifdef CLUSTER_SUPPORT
const char *sockname;
#endif
switch (lock_order) {
case DBWRAP_LOCK_ORDER_1:
case DBWRAP_LOCK_ORDER_2:
case DBWRAP_LOCK_ORDER_3:
break;
default:
/*
* Only allow the 3 levels ctdb gives us.
*/
errno = EINVAL;
return NULL;
}
if (tdb_flags & TDB_CLEAR_IF_FIRST) {
const char *base;
bool try_readonly = false;
base = strrchr_m(name, '/');
if (base != NULL) {
base += 1;
} else {
base = name;
}
if (dbwrap_flags & DBWRAP_FLAG_OPTIMIZE_READONLY_ACCESS) {
try_readonly = true;
}
try_readonly = lp_parm_bool(-1, "dbwrap_optimize_readonly", "*", try_readonly);
try_readonly = lp_parm_bool(-1, "dbwrap_optimize_readonly", base, try_readonly);
if (try_readonly) {
dbwrap_flags |= DBWRAP_FLAG_OPTIMIZE_READONLY_ACCESS;
} else {
dbwrap_flags &= ~DBWRAP_FLAG_OPTIMIZE_READONLY_ACCESS;
}
}
#ifdef CLUSTER_SUPPORT
sockname = lp_ctdbd_socket();
if (lp_clustering()) {
const char *partname;
if (!socket_exist(sockname)) {
DEBUG(1, ("ctdb socket does not exist - is ctdb not "
"running?\n"));
return NULL;
}
/* ctdb only wants the file part of the name */
partname = strrchr(name, '/');
if (partname) {
partname++;
} else {
partname = name;
}
/* allow ctdb for individual databases to be disabled */
if (lp_parm_bool(-1, "ctdb", partname, True)) {
result = db_open_ctdb(mem_ctx, partname, hash_size,
tdb_flags, open_flags, mode,
lock_order, dbwrap_flags);
if (result == NULL) {
DEBUG(0,("failed to attach to ctdb %s\n",
partname));
if (errno == 0) {
errno = EIO;
}
return NULL;
}
}
}
#endif
if (result == NULL) {
struct loadparm_context *lp_ctx = loadparm_init_s3(mem_ctx, loadparm_s3_helpers());
result = dbwrap_local_open(mem_ctx, lp_ctx, name, hash_size,
tdb_flags, open_flags, mode,
lock_order, dbwrap_flags);
talloc_unlink(mem_ctx, lp_ctx);
}
return result;
}
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