1
0
mirror of https://github.com/samba-team/samba.git synced 2025-02-16 09:57:47 +03:00
Jelmer Vernooij 51db4c3f3d r26228: Store loadparm context in auth context, move more loadparm_contexts up the call stack.
(This used to be commit ba75f1613a9aac69dd5df94dd8a2b37820acd166)
2007-12-21 05:47:05 +01:00

268 lines
6.8 KiB
C

/*
Unix SMB/CIFS implementation.
Database interface wrapper around tdb
Copyright (C) Volker Lendecke 2005
Copyright (C) Andrew Tridgell 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 "lib/tdb/include/tdb.h"
#include "lib/dbwrap/dbwrap.h"
#include "system/filesys.h"
#include "tdb_wrap.h"
#include "param/param.h"
struct db_tdb_ctx {
struct tdb_wrap *wtdb;
};
static NTSTATUS db_tdb_store(struct db_record *rec, TDB_DATA data, int flag);
static NTSTATUS db_tdb_delete(struct db_record *rec);
static int db_tdb_record_destr(struct db_record* data)
{
struct db_tdb_ctx *ctx = talloc_get_type(data->private_data, struct db_tdb_ctx);
if (tdb_chainunlock(ctx->wtdb->tdb, data->key) != 0) {
DEBUG(0, ("tdb_chainunlock failed\n"));
return -1;
}
return 0;
}
static int db_tdb_fetch(struct db_context *db, TALLOC_CTX *mem_ctx, TDB_DATA key, TDB_DATA *data)
{
struct db_tdb_ctx *ctx = talloc_get_type(db->private_data, struct db_tdb_ctx);
TDB_DATA value;
value = tdb_fetch(ctx->wtdb->tdb, key);
if (value.dptr == NULL) {
return -1;
}
data->dsize = value.dsize;
data->dptr = (uint8_t *)talloc_memdup(mem_ctx, value.dptr, value.dsize);
free(value.dptr);
if (data->dptr == NULL) {
errno = ENOMEM;
return -1;
}
return 0;
}
static struct db_record *db_tdb_fetch_locked(struct db_context *db,
TALLOC_CTX *mem_ctx, TDB_DATA key)
{
struct db_tdb_ctx *ctx = talloc_get_type(db->private_data, struct db_tdb_ctx);
struct db_record *result;
TDB_DATA value;
result = talloc(mem_ctx, struct db_record);
if (result == NULL) {
return NULL;
}
result->key.dsize = key.dsize;
result->key.dptr = (uint8_t *)talloc_memdup(result, key.dptr, key.dsize);
if (result->key.dptr == NULL) {
talloc_free(result);
return NULL;
}
result->value.dptr = NULL;
result->value.dsize = 0;
result->private_data = talloc_reference(result, ctx);
result->store = db_tdb_store;
result->delete_rec = db_tdb_delete;
if (tdb_chainlock(ctx->wtdb->tdb, key) != 0) {
talloc_free(result);
return NULL;
}
talloc_set_destructor(result, db_tdb_record_destr);
value = tdb_fetch(ctx->wtdb->tdb, key);
if (value.dptr == NULL) {
return result;
}
result->value.dsize = value.dsize;
result->value.dptr = (uint8_t *)talloc_memdup(result, value.dptr,
value.dsize);
free(value.dptr);
if (result->value.dptr == NULL) {
talloc_free(result);
return NULL;
}
return result;
}
static NTSTATUS db_tdb_store(struct db_record *rec, TDB_DATA data, int flag)
{
struct db_tdb_ctx *ctx = talloc_get_type(rec->private_data, struct db_tdb_ctx);
/*
* This has a bug: We need to replace rec->value for correct
* operation, but right now brlock and locking don't use the value
* anymore after it was stored.
*/
return (tdb_store(ctx->wtdb->tdb, rec->key, data, flag) == 0) ?
NT_STATUS_OK : NT_STATUS_UNSUCCESSFUL;
}
static NTSTATUS db_tdb_delete(struct db_record *rec)
{
struct db_tdb_ctx *ctx = talloc_get_type(rec->private_data, struct db_tdb_ctx);
return (tdb_delete(ctx->wtdb->tdb, rec->key) == 0) ?
NT_STATUS_OK : NT_STATUS_UNSUCCESSFUL;
}
struct db_tdb_traverse_ctx {
struct db_context *db;
int (*f)(struct db_record *rec, void *private_data);
void *private_data;
};
static int db_tdb_traverse_func(TDB_CONTEXT *tdb, TDB_DATA kbuf, TDB_DATA dbuf,
void *private_data)
{
struct db_tdb_traverse_ctx *ctx =
(struct db_tdb_traverse_ctx *)private_data;
struct db_record rec;
rec.key = kbuf;
rec.value = dbuf;
rec.store = db_tdb_store;
rec.delete_rec = db_tdb_delete;
rec.private_data = ctx->db->private_data;
return ctx->f(&rec, ctx->private_data);
}
static int db_tdb_traverse(struct db_context *db,
int (*f)(struct db_record *rec, void *private_data),
void *private_data)
{
struct db_tdb_ctx *db_ctx =
talloc_get_type(db->private_data, struct db_tdb_ctx);
struct db_tdb_traverse_ctx ctx;
ctx.db = db;
ctx.f = f;
ctx.private_data = private_data;
return tdb_traverse(db_ctx->wtdb->tdb, db_tdb_traverse_func, &ctx);
}
static NTSTATUS db_tdb_store_deny(struct db_record *rec, TDB_DATA data, int flag)
{
return NT_STATUS_MEDIA_WRITE_PROTECTED;
}
static NTSTATUS db_tdb_delete_deny(struct db_record *rec)
{
return NT_STATUS_MEDIA_WRITE_PROTECTED;
}
static int db_tdb_traverse_read_func(TDB_CONTEXT *tdb, TDB_DATA kbuf, TDB_DATA dbuf,
void *private_data)
{
struct db_tdb_traverse_ctx *ctx =
(struct db_tdb_traverse_ctx *)private_data;
struct db_record rec;
rec.key = kbuf;
rec.value = dbuf;
rec.store = db_tdb_store_deny;
rec.delete_rec = db_tdb_delete_deny;
rec.private_data = ctx->db->private_data;
return ctx->f(&rec, ctx->private_data);
}
static int db_tdb_traverse_read(struct db_context *db,
int (*f)(struct db_record *rec, void *private_data),
void *private_data)
{
struct db_tdb_ctx *db_ctx =
talloc_get_type(db->private_data, struct db_tdb_ctx);
struct db_tdb_traverse_ctx ctx;
ctx.db = db;
ctx.f = f;
ctx.private_data = private_data;
return tdb_traverse_read(db_ctx->wtdb->tdb, db_tdb_traverse_read_func, &ctx);
}
static int db_tdb_get_seqnum(struct db_context *db)
{
struct db_tdb_ctx *db_ctx =
talloc_get_type(db->private_data, struct db_tdb_ctx);
return tdb_get_seqnum(db_ctx->wtdb->tdb);
}
/*
open a temporary database
*/
struct db_context *db_tmp_open_tdb(TALLOC_CTX *mem_ctx, struct loadparm_context *lp_ctx,
const char *name, int tdb_flags)
{
struct db_context *result;
struct db_tdb_ctx *db_tdb;
char *path;
result = talloc_zero(mem_ctx, struct db_context);
if (result == NULL) goto failed;
db_tdb = talloc(result, struct db_tdb_ctx);
if (db_tdb == NULL) goto failed;
result->private_data = db_tdb;
/* the name passed in should not be a full path, it should be
just be the db name */
path = smbd_tmp_path(result, lp_ctx, name);
db_tdb->wtdb = tdb_wrap_open(db_tdb, path, 0, tdb_flags,
O_CREAT|O_RDWR, 0666);
if (db_tdb->wtdb == NULL) {
DEBUG(3, ("Could not open tdb '%s': %s\n", path, strerror(errno)));
goto failed;
}
talloc_free(path);
result->fetch_locked = db_tdb_fetch_locked;
result->fetch = db_tdb_fetch;
result->traverse = db_tdb_traverse;
result->traverse_read = db_tdb_traverse_read;
result->get_seqnum = db_tdb_get_seqnum;
return result;
failed:
talloc_free(result);
return NULL;
}