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util: util_ntdb.c

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The first function is ntdb_new: this is preferred over ntdb_open, as
it makes the ntdb_context returned (and all NTDB_DATA returned from
ntdb_fetch) valid talloc pointers.

The API is very similar to tdb_wrap_open().

Note that we handle $TDB_NO_FSYNC here, since ntdb doesn't do that
hack (and it's great for speeding up testing!).

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
This commit is contained in:
Rusty Russell 2012-06-22 09:44:41 +09:30
parent 7c1d9fb3c1
commit 735290f474
3 changed files with 168 additions and 0 deletions
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114
lib/util/util_ntdb.c Normal file
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@ -0,0 +1,114 @@
/*
Unix SMB/CIFS implementation.
ntdb utility functions
Copyright (C) Rusty Russell 2012
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 "util_ntdb.h"
#include "lib/param/param.h"
static void *ntdb_talloc(const void *owner, size_t len, void *priv_data)
{
return talloc_size(owner, len);
}
static void *ntdb_expand(void *old, size_t newlen, void *priv_data)
{
return talloc_realloc_size(NULL, old, newlen);
}
static void ntdb_free(void *old, void *priv_data)
{
talloc_free(old);
}
static int ntdb_destroy(struct ntdb_context *ntdb)
{
ntdb_close(ntdb);
return 0;
}
static void ntdb_log(struct ntdb_context *ntdb,
enum ntdb_log_level level,
enum NTDB_ERROR ecode,
const char *message,
void *unused)
{
int dl;
const char *name = ntdb_name(ntdb);
switch (level) {
case NTDB_LOG_USE_ERROR:
case NTDB_LOG_ERROR:
dl = 0;
break;
case NTDB_LOG_WARNING:
dl = 2;
break;
default:
dl = 0;
}
DEBUG(dl, ("ntdb(%s):%s: %s\n", name ? name : "unnamed",
ntdb_errorstr(ecode), message));
}
struct ntdb_context *ntdb_new(TALLOC_CTX *ctx,
const char *name, int ntdb_flags,
int open_flags, mode_t mode,
union ntdb_attribute *attr,
struct loadparm_context *lp_ctx)
{
union ntdb_attribute log_attr, alloc_attr;
struct ntdb_context *ntdb;
if (lp_ctx && !lpcfg_use_mmap(lp_ctx)) {
ntdb_flags |= NTDB_NOMMAP;
}
/* Great hack for speeding testing! */
if (getenv("TDB_NO_FSYNC")) {
ntdb_flags |= NTDB_NOSYNC;
}
log_attr.base.next = attr;
log_attr.base.attr = NTDB_ATTRIBUTE_LOG;
log_attr.log.fn = ntdb_log;
alloc_attr.base.next = &log_attr;
alloc_attr.base.attr = NTDB_ATTRIBUTE_ALLOCATOR;
alloc_attr.alloc.alloc = ntdb_talloc;
alloc_attr.alloc.expand = ntdb_expand;
alloc_attr.alloc.free = ntdb_free;
ntdb = ntdb_open(name, ntdb_flags, open_flags, mode, &alloc_attr);
if (!ntdb) {
return NULL;
}
/* We can re-use the tdb's path name for the talloc name */
name = ntdb_name(ntdb);
if (name) {
talloc_set_name_const(ntdb, name);
} else {
talloc_set_name_const(ntdb, "unnamed ntdb");
}
talloc_set_destructor(ntdb, ntdb_destroy);
return talloc_steal(ctx, ntdb);
}

47
lib/util/util_ntdb.h Normal file
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@ -0,0 +1,47 @@
/*
Unix SMB/CIFS implementation.
tdb utility functions
Copyright (C) Rusty Russell 2012
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/>.
*/
#ifndef _____LIB_UTIL_UTIL_NTDB_H__
#define _____LIB_UTIL_UTIL_NTDB_H__
#include <ntdb.h>
#include <talloc.h>
struct loadparm_context;
union ntdb_attribute;
/***************************************************************
Open an NTDB using talloc: it will be allocated off the context, and
all NTDB_DATA.dptr are allocated as children of the ntdb context.
Sets up a logging function for you, and uses lp_ctx to decide whether
to disable mmap.
Any extra ntdb attributes can be handed through attr; usually it's
NULL, ntdb_new provides logging and allocator attributes.
The destructor for the struct ntdb_context will do ntdb_close()
for you.
****************************************************************/
struct ntdb_context *ntdb_new(TALLOC_CTX *ctx,
const char *name, int ntdb_flags,
int open_flags, mode_t mode,
union ntdb_attribute *attr,
struct loadparm_context *lp_ctx);
#endif /* _____LIB_UTIL_UTIL_NTDB_H__ */

7
lib/util/wscript_build
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@ -45,6 +45,13 @@ bld.SAMBA_LIBRARY('util_tdb',
private_library=True
)
bld.SAMBA_LIBRARY('util_ntdb',
source='util_ntdb.c',
local_include=False,
public_deps='ntdb talloc samba-util samba-hostconfig',
private_library=True
)
bld.SAMBA_LIBRARY('tevent-util',
source='tevent_unix.c tevent_ntstatus.c tevent_werror.c',
local_include=False,