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|
/*
ldb database library
Copyright (C) Andrew Tridgell 2004
Copyright (C) Stefan Metzmacher 2004
Copyright (C) Simo Sorce 2006
** NOTE! The following LGPL license applies to the ldb
** library. This does NOT imply that all of Samba is released
** under the LGPL
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2 of the License, or (at your option) any later version.
This library 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
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
/*
* Name: ldb_tdb
*
* Component: ldb tdb backend
*
* Description: core functions for tdb backend
*
* Author: Andrew Tridgell
* Author: Stefan Metzmacher
*
* Modifications:
*
* - description: make the module use asyncronous calls
* date: Feb 2006
* Author: Simo Sorce
*/
#include "includes.h"
#include "ldb/include/includes.h"
#include "ldb/ldb_tdb/ldb_tdb.h"
/*
map a tdb error code to a ldb error code
*/
static int ltdb_err_map(enum TDB_ERROR tdb_code)
{
switch (tdb_code) {
case TDB_SUCCESS:
return LDB_SUCCESS;
case TDB_ERR_CORRUPT:
case TDB_ERR_OOM:
case TDB_ERR_EINVAL:
return LDB_ERR_OPERATIONS_ERROR;
case TDB_ERR_IO:
return LDB_ERR_PROTOCOL_ERROR;
case TDB_ERR_LOCK:
case TDB_ERR_NOLOCK:
return LDB_ERR_BUSY;
case TDB_ERR_LOCK_TIMEOUT:
return LDB_ERR_TIME_LIMIT_EXCEEDED;
case TDB_ERR_EXISTS:
return LDB_ERR_ENTRY_ALREADY_EXISTS;
case TDB_ERR_NOEXIST:
return LDB_ERR_NO_SUCH_OBJECT;
case TDB_ERR_RDONLY:
return LDB_ERR_INSUFFICIENT_ACCESS_RIGHTS;
}
return LDB_ERR_OTHER;
}
struct ldb_async_handle *init_ltdb_handle(struct ltdb_private *ltdb, struct ldb_module *module,
void *context,
int (*callback)(struct ldb_context *, void *, struct ldb_async_result *))
{
struct ltdb_async_context *ac;
struct ldb_async_handle *h;
h = talloc_zero(ltdb, struct ldb_async_handle);
if (h == NULL) {
ldb_set_errstring(module->ldb, talloc_asprintf(module, "Out of Memory"));
return NULL;
}
h->module = module;
ac = talloc_zero(h, struct ltdb_async_context);
if (ac == NULL) {
ldb_set_errstring(module->ldb, talloc_asprintf(module, "Out of Memory"));
talloc_free(h);
return NULL;
}
h->private_data = (void *)ac;
h->state = LDB_ASYNC_INIT;
h->status = LDB_SUCCESS;
ac->module = module;
ac->context = context;
ac->callback = callback;
return h;
}
/*
form a TDB_DATA for a record key
caller frees
note that the key for a record can depend on whether the
dn refers to a case sensitive index record or not
*/
struct TDB_DATA ltdb_key(struct ldb_module *module, const struct ldb_dn *dn)
{
struct ldb_context *ldb = module->ldb;
TDB_DATA key;
char *key_str = NULL;
char *dn_folded = NULL;
/*
most DNs are case insensitive. The exception is index DNs for
case sensitive attributes
there are 3 cases dealt with in this code:
1) if the dn doesn't start with @ then uppercase the attribute
names and the attributes values of case insensitive attributes
2) if the dn starts with @ then leave it alone - the indexing code handles
the rest
*/
dn_folded = ldb_dn_linearize_casefold(ldb, dn);
if (!dn_folded) {
goto failed;
}
key_str = talloc_asprintf(ldb, "DN=%s", dn_folded);
talloc_free(dn_folded);
if (!key_str) {
goto failed;
}
key.dptr = (uint8_t *)key_str;
key.dsize = strlen(key_str) + 1;
return key;
failed:
errno = ENOMEM;
key.dptr = NULL;
key.dsize = 0;
return key;
}
/*
check special dn's have valid attributes
currently only @ATTRIBUTES is checked
*/
int ltdb_check_special_dn(struct ldb_module *module, const struct ldb_message *msg)
{
int i, j;
if (! ldb_dn_is_special(msg->dn) ||
! ldb_dn_check_special(msg->dn, LTDB_ATTRIBUTES)) {
return 0;
}
/* we have @ATTRIBUTES, let's check attributes are fine */
/* should we check that we deny multivalued attributes ? */
for (i = 0; i < msg->num_elements; i++) {
for (j = 0; j < msg->elements[i].num_values; j++) {
if (ltdb_check_at_attributes_values(&msg->elements[i].values[j]) != 0) {
char *err_string = talloc_strdup(module, "Invalid attribute value in an @ATTRIBUTES entry");
if (err_string) {
ldb_set_errstring(module->ldb, err_string);
}
return LDB_ERR_INVALID_ATTRIBUTE_SYNTAX;
}
}
}
return 0;
}
/*
we've made a modification to a dn - possibly reindex and
update sequence number
*/
static int ltdb_modified(struct ldb_module *module, const struct ldb_dn *dn)
{
int ret = 0;
if (ldb_dn_is_special(dn) &&
(ldb_dn_check_special(dn, LTDB_INDEXLIST) ||
ldb_dn_check_special(dn, LTDB_ATTRIBUTES)) ) {
ret = ltdb_reindex(module);
}
if (ret == 0 &&
!(ldb_dn_is_special(dn) &&
ldb_dn_check_special(dn, LTDB_BASEINFO)) ) {
ret = ltdb_increase_sequence_number(module);
}
return ret;
}
/*
store a record into the db
*/
int ltdb_store(struct ldb_module *module, const struct ldb_message *msg, int flgs)
{
struct ltdb_private *ltdb = module->private_data;
TDB_DATA tdb_key, tdb_data;
int ret;
tdb_key = ltdb_key(module, msg->dn);
if (!tdb_key.dptr) {
return LDB_ERR_OTHER;
}
ret = ltdb_pack_data(module, msg, &tdb_data);
if (ret == -1) {
talloc_free(tdb_key.dptr);
return LDB_ERR_OTHER;
}
ret = tdb_store(ltdb->tdb, tdb_key, tdb_data, flgs);
if (ret == -1) {
ret = ltdb_err_map(tdb_error(ltdb->tdb));
goto done;
}
ret = ltdb_index_add(module, msg);
if (ret == -1) {
tdb_delete(ltdb->tdb, tdb_key);
}
done:
talloc_free(tdb_key.dptr);
talloc_free(tdb_data.dptr);
return ret;
}
static int ltdb_add_internal(struct ldb_module *module, const struct ldb_message *msg)
{
int ret;
ret = ltdb_check_special_dn(module, msg);
if (ret != LDB_SUCCESS) {
return ret;
}
if (ltdb_cache_load(module) != 0) {
return LDB_ERR_OPERATIONS_ERROR;
}
ret = ltdb_store(module, msg, TDB_INSERT);
if (ret != LDB_SUCCESS) {
return ret;
}
ret = ltdb_modified(module, msg->dn);
if (ret != LDB_SUCCESS) {
return LDB_ERR_OPERATIONS_ERROR;
}
return LDB_SUCCESS;
}
/*
add a record to the database
*/
static int ltdb_add(struct ldb_module *module, struct ldb_request *req)
{
struct ltdb_private *ltdb = talloc_get_type(module->private_data, struct ltdb_private);
struct ltdb_async_context *ltdb_ac;
int tret, ret = LDB_SUCCESS;
if (req->controls != NULL) {
ldb_debug(module->ldb, LDB_DEBUG_WARNING, "Controls should not reach the ldb_tdb backend!\n");
if (check_critical_controls(req->controls)) {
return LDB_ERR_UNSUPPORTED_CRITICAL_EXTENSION;
}
}
req->async.handle = init_ltdb_handle(ltdb, module, req->async.context, req->async.callback);
if (req->async.handle == NULL) {
return LDB_ERR_OPERATIONS_ERROR;
}
ltdb_ac = talloc_get_type(req->async.handle->private_data, struct ltdb_async_context);
tret = ltdb_add_internal(module, req->op.add.message);
if (tret != LDB_SUCCESS) {
req->async.handle->status = tret;
goto done;
}
if (ltdb_ac->callback) {
ret = ltdb_ac->callback(module->ldb, ltdb_ac->context, NULL);
}
done:
req->async.handle->state = LDB_ASYNC_DONE;
return ret;
}
/*
delete a record from the database, not updating indexes (used for deleting
index records)
*/
int ltdb_delete_noindex(struct ldb_module *module, const struct ldb_dn *dn)
{
struct ltdb_private *ltdb = module->private_data;
TDB_DATA tdb_key;
int ret;
tdb_key = ltdb_key(module, dn);
if (!tdb_key.dptr) {
return LDB_ERR_OTHER;
}
ret = tdb_delete(ltdb->tdb, tdb_key);
talloc_free(tdb_key.dptr);
if (ret != 0) {
ret = ltdb_err_map(tdb_error(ltdb->tdb));
}
return ret;
}
static int ltdb_delete_internal(struct ldb_module *module, const struct ldb_dn *dn)
{
struct ldb_message *msg;
int ret;
msg = talloc(module, struct ldb_message);
if (msg == NULL) {
return LDB_ERR_OPERATIONS_ERROR;
}
/* in case any attribute of the message was indexed, we need
to fetch the old record */
ret = ltdb_search_dn1(module, dn, msg);
if (ret != 1) {
/* not finding the old record is an error */
talloc_free(msg);
return LDB_ERR_NO_SUCH_OBJECT;
}
ret = ltdb_delete_noindex(module, dn);
if (ret != LDB_SUCCESS) {
talloc_free(msg);
return LDB_ERR_NO_SUCH_OBJECT;
}
/* remove any indexed attributes */
ret = ltdb_index_del(module, msg);
if (ret != LDB_SUCCESS) {
talloc_free(msg);
return LDB_ERR_OPERATIONS_ERROR;
}
ret = ltdb_modified(module, dn);
if (ret != LDB_SUCCESS) {
return LDB_ERR_OPERATIONS_ERROR;
}
talloc_free(msg);
return LDB_SUCCESS;
}
/*
delete a record from the database
*/
static int ltdb_delete(struct ldb_module *module, struct ldb_request *req)
{
struct ltdb_private *ltdb = talloc_get_type(module->private_data, struct ltdb_private);
struct ltdb_async_context *ltdb_ac;
int tret, ret = LDB_SUCCESS;
if (req->controls != NULL) {
ldb_debug(module->ldb, LDB_DEBUG_WARNING, "Controls should not reach the ldb_tdb backend!\n");
if (check_critical_controls(req->controls)) {
return LDB_ERR_UNSUPPORTED_CRITICAL_EXTENSION;
}
}
req->async.handle = NULL;
if (ltdb_cache_load(module) != 0) {
return LDB_ERR_OPERATIONS_ERROR;
}
req->async.handle = init_ltdb_handle(ltdb, module, req->async.context, req->async.callback);
if (req->async.handle == NULL) {
return LDB_ERR_OPERATIONS_ERROR;
}
ltdb_ac = talloc_get_type(req->async.handle->private_data, struct ltdb_async_context);
tret = ltdb_delete_internal(module, req->op.del.dn);
if (tret != LDB_SUCCESS) {
req->async.handle->status = tret;
goto done;
}
if (ltdb_ac->callback) {
ret = ltdb_ac->callback(module->ldb, ltdb_ac->context, NULL);
}
done:
req->async.handle->state = LDB_ASYNC_DONE;
return ret;
}
/*
find an element by attribute name. At the moment this does a linear search, it should
be re-coded to use a binary search once all places that modify records guarantee
sorted order
return the index of the first matching element if found, otherwise -1
*/
static int find_element(const struct ldb_message *msg, const char *name)
{
unsigned int i;
for (i=0;i<msg->num_elements;i++) {
if (ldb_attr_cmp(msg->elements[i].name, name) == 0) {
return i;
}
}
return -1;
}
/*
add an element to an existing record. Assumes a elements array that we
can call re-alloc on, and assumed that we can re-use the data pointers from the
passed in additional values. Use with care!
returns 0 on success, -1 on failure (and sets errno)
*/
static int msg_add_element(struct ldb_context *ldb,
struct ldb_message *msg, struct ldb_message_element *el)
{
struct ldb_message_element *e2;
unsigned int i;
e2 = talloc_realloc(msg, msg->elements, struct ldb_message_element,
msg->num_elements+1);
if (!e2) {
errno = ENOMEM;
return -1;
}
msg->elements = e2;
e2 = &msg->elements[msg->num_elements];
e2->name = el->name;
e2->flags = el->flags;
e2->values = NULL;
if (el->num_values != 0) {
e2->values = talloc_array(msg->elements, struct ldb_val, el->num_values);
if (!e2->values) {
errno = ENOMEM;
return -1;
}
}
for (i=0;i<el->num_values;i++) {
e2->values[i] = el->values[i];
}
e2->num_values = el->num_values;
msg->num_elements++;
return 0;
}
/*
delete all elements having a specified attribute name
*/
static int msg_delete_attribute(struct ldb_module *module,
struct ldb_context *ldb,
struct ldb_message *msg, const char *name)
{
char *dn;
unsigned int i, j;
dn = ldb_dn_linearize(ldb, msg->dn);
if (dn == NULL) {
return -1;
}
for (i=0;i<msg->num_elements;i++) {
if (ldb_attr_cmp(msg->elements[i].name, name) == 0) {
for (j=0;j<msg->elements[i].num_values;j++) {
ltdb_index_del_value(module, dn, &msg->elements[i], j);
}
talloc_free(msg->elements[i].values);
if (msg->num_elements > (i+1)) {
memmove(&msg->elements[i],
&msg->elements[i+1],
sizeof(struct ldb_message_element)*
(msg->num_elements - (i+1)));
}
msg->num_elements--;
i--;
msg->elements = talloc_realloc(msg, msg->elements,
struct ldb_message_element,
msg->num_elements);
}
}
talloc_free(dn);
return 0;
}
/*
delete all elements matching an attribute name/value
return 0 on success, -1 on failure
*/
static int msg_delete_element(struct ldb_module *module,
struct ldb_message *msg,
const char *name,
const struct ldb_val *val)
{
struct ldb_context *ldb = module->ldb;
unsigned int i;
int found;
struct ldb_message_element *el;
const struct ldb_attrib_handler *h;
found = find_element(msg, name);
if (found == -1) {
return -1;
}
el = &msg->elements[found];
h = ldb_attrib_handler(ldb, el->name);
for (i=0;i<el->num_values;i++) {
if (h->comparison_fn(ldb, ldb, &el->values[i], val) == 0) {
if (i<el->num_values-1) {
memmove(&el->values[i], &el->values[i+1],
sizeof(el->values[i])*(el->num_values-(i+1)));
}
el->num_values--;
if (el->num_values == 0) {
return msg_delete_attribute(module, ldb, msg, name);
}
return 0;
}
}
return -1;
}
/*
modify a record - internal interface
yuck - this is O(n^2). Luckily n is usually small so we probably
get away with it, but if we ever have really large attribute lists
then we'll need to look at this again
*/
int ltdb_modify_internal(struct ldb_module *module, const struct ldb_message *msg)
{
struct ldb_context *ldb = module->ldb;
struct ltdb_private *ltdb = module->private_data;
TDB_DATA tdb_key, tdb_data;
struct ldb_message *msg2;
unsigned i, j;
int ret;
tdb_key = ltdb_key(module, msg->dn);
if (!tdb_key.dptr) {
return LDB_ERR_OTHER;
}
tdb_data = tdb_fetch(ltdb->tdb, tdb_key);
if (!tdb_data.dptr) {
talloc_free(tdb_key.dptr);
return ltdb_err_map(tdb_error(ltdb->tdb));
}
msg2 = talloc(tdb_key.dptr, struct ldb_message);
if (msg2 == NULL) {
talloc_free(tdb_key.dptr);
return LDB_ERR_OTHER;
}
ret = ltdb_unpack_data(module, &tdb_data, msg2);
if (ret == -1) {
ret = LDB_ERR_OTHER;
goto failed;
}
if (!msg2->dn) {
msg2->dn = msg->dn;
}
for (i=0;i<msg->num_elements;i++) {
struct ldb_message_element *el = &msg->elements[i];
struct ldb_message_element *el2;
struct ldb_val *vals;
char *err_string;
char *dn;
switch (msg->elements[i].flags & LDB_FLAG_MOD_MASK) {
case LDB_FLAG_MOD_ADD:
/* add this element to the message. fail if it
already exists */
ret = find_element(msg2, el->name);
if (ret == -1) {
if (msg_add_element(ldb, msg2, el) != 0) {
ret = LDB_ERR_OTHER;
goto failed;
}
continue;
}
el2 = &msg2->elements[ret];
/* An attribute with this name already exists, add all
* values if they don't already exist. */
for (j=0;j<el->num_values;j++) {
if (ldb_msg_find_val(el2, &el->values[j])) {
err_string = talloc_strdup(module, "Type or value exists");
if (err_string) ldb_set_errstring(module->ldb, err_string);
ret = LDB_ERR_ATTRIBUTE_OR_VALUE_EXISTS;
goto failed;
}
}
vals = talloc_realloc(msg2->elements, el2->values, struct ldb_val,
el2->num_values + el->num_values);
if (vals == NULL) {
ret = LDB_ERR_OTHER;
goto failed;
}
for (j=0;j<el->num_values;j++) {
vals[el2->num_values + j] =
ldb_val_dup(vals, &el->values[j]);
}
el2->values = vals;
el2->num_values += el->num_values;
break;
case LDB_FLAG_MOD_REPLACE:
/* replace all elements of this attribute name with the elements
listed. The attribute not existing is not an error */
msg_delete_attribute(module, ldb, msg2, msg->elements[i].name);
/* add the replacement element, if not empty */
if (msg->elements[i].num_values != 0 &&
msg_add_element(ldb, msg2, &msg->elements[i]) != 0) {
ret = LDB_ERR_OTHER;
goto failed;
}
break;
case LDB_FLAG_MOD_DELETE:
dn = ldb_dn_linearize(msg2, msg->dn);
if (dn == NULL) {
ret = LDB_ERR_OTHER;
goto failed;
}
/* we could be being asked to delete all
values or just some values */
if (msg->elements[i].num_values == 0) {
if (msg_delete_attribute(module, ldb, msg2,
msg->elements[i].name) != 0) {
err_string = talloc_asprintf(module, "No such attribute: %s", msg->elements[i].name);
if (err_string) ldb_set_errstring(module->ldb, err_string);
ret = LDB_ERR_NO_SUCH_ATTRIBUTE;
goto failed;
}
break;
}
for (j=0;j<msg->elements[i].num_values;j++) {
if (msg_delete_element(module,
msg2,
msg->elements[i].name,
&msg->elements[i].values[j]) != 0) {
err_string = talloc_asprintf(module, "No such attribute: %s", msg->elements[i].name);
if (err_string) ldb_set_errstring(module->ldb, err_string);
ret = LDB_ERR_NO_SUCH_ATTRIBUTE;
goto failed;
}
if (ltdb_index_del_value(module, dn, &msg->elements[i], j) != 0) {
ret = LDB_ERR_OTHER;
goto failed;
}
}
break;
default:
err_string = talloc_asprintf(module, "Invalid ldb_modify flags on %s: 0x%x",
msg->elements[i].name,
msg->elements[i].flags & LDB_FLAG_MOD_MASK);
if (err_string) ldb_set_errstring(module->ldb, err_string);
ret = LDB_ERR_PROTOCOL_ERROR;
goto failed;
}
}
/* we've made all the mods - save the modified record back into the database */
ret = ltdb_store(module, msg2, TDB_MODIFY);
if (ret != LDB_SUCCESS) {
goto failed;
}
if (ltdb_modified(module, msg->dn) != LDB_SUCCESS) {
ret = LDB_ERR_OPERATIONS_ERROR;
goto failed;
}
talloc_free(tdb_key.dptr);
free(tdb_data.dptr);
return ret;
failed:
talloc_free(tdb_key.dptr);
free(tdb_data.dptr);
return ret;
}
/*
modify a record
*/
static int ltdb_modify(struct ldb_module *module, struct ldb_request *req)
{
struct ltdb_private *ltdb = talloc_get_type(module->private_data, struct ltdb_private);
struct ltdb_async_context *ltdb_ac;
int tret, ret = LDB_SUCCESS;
if (req->controls != NULL) {
ldb_debug(module->ldb, LDB_DEBUG_WARNING, "Controls should not reach the ldb_tdb backend!\n");
if (check_critical_controls(req->controls)) {
return LDB_ERR_UNSUPPORTED_CRITICAL_EXTENSION;
}
}
req->async.handle = NULL;
req->async.handle = init_ltdb_handle(ltdb, module, req->async.context, req->async.callback);
if (req->async.handle == NULL) {
return LDB_ERR_OPERATIONS_ERROR;
}
ltdb_ac = talloc_get_type(req->async.handle->private_data, struct ltdb_async_context);
tret = ltdb_check_special_dn(module, req->op.mod.message);
if (tret != LDB_SUCCESS) {
req->async.handle->status = tret;
goto done;
}
if (ltdb_cache_load(module) != 0) {
ret = LDB_ERR_OPERATIONS_ERROR;
goto done;
}
tret = ltdb_modify_internal(module, req->op.mod.message);
if (tret != LDB_SUCCESS) {
req->async.handle->status = tret;
goto done;
}
if (ltdb_ac->callback) {
ret = ltdb_ac->callback(module->ldb, ltdb_ac->context, NULL);
}
done:
req->async.handle->state = LDB_ASYNC_DONE;
return ret;
}
/*
rename a record
*/
static int ltdb_rename(struct ldb_module *module, struct ldb_request *req)
{
struct ltdb_private *ltdb = talloc_get_type(module->private_data, struct ltdb_private);
struct ltdb_async_context *ltdb_ac;
struct ldb_message *msg;
int tret, ret = LDB_SUCCESS;
if (req->controls != NULL) {
ldb_debug(module->ldb, LDB_DEBUG_WARNING, "Controls should not reach the ldb_tdb backend!\n");
if (check_critical_controls(req->controls)) {
return LDB_ERR_UNSUPPORTED_CRITICAL_EXTENSION;
}
}
req->async.handle = NULL;
if (ltdb_cache_load(module) != 0) {
return LDB_ERR_OPERATIONS_ERROR;
}
req->async.handle = init_ltdb_handle(ltdb, module, req->async.context, req->async.callback);
if (req->async.handle == NULL) {
return LDB_ERR_OPERATIONS_ERROR;
}
ltdb_ac = talloc_get_type(req->async.handle->private_data, struct ltdb_async_context);
msg = talloc(ltdb_ac, struct ldb_message);
if (msg == NULL) {
ret = LDB_ERR_OPERATIONS_ERROR;
goto done;
}
/* in case any attribute of the message was indexed, we need
to fetch the old record */
tret = ltdb_search_dn1(module, req->op.rename.olddn, msg);
if (tret != 1) {
/* not finding the old record is an error */
req->async.handle->status = LDB_ERR_NO_SUCH_OBJECT;
goto done;
}
msg->dn = ldb_dn_copy(msg, req->op.rename.newdn);
if (!msg->dn) {
ret = LDB_ERR_OPERATIONS_ERROR;
goto done;
}
tret = ltdb_add_internal(module, msg);
if (tret != LDB_SUCCESS) {
ret = LDB_ERR_OPERATIONS_ERROR;
goto done;
}
tret = ltdb_delete_internal(module, req->op.rename.olddn);
if (tret != LDB_SUCCESS) {
ltdb_delete_internal(module, req->op.rename.newdn);
ret = LDB_ERR_OPERATIONS_ERROR;
goto done;
}
if (ltdb_ac->callback) {
ret = ltdb_ac->callback(module->ldb, ltdb_ac->context, NULL);
}
done:
req->async.handle->state = LDB_ASYNC_DONE;
return ret;
}
static int ltdb_start_trans(struct ldb_module *module)
{
struct ltdb_private *ltdb = module->private_data;
if (tdb_transaction_start(ltdb->tdb) != 0) {
return ltdb_err_map(tdb_error(ltdb->tdb));
}
return LDB_SUCCESS;
}
static int ltdb_end_trans(struct ldb_module *module)
{
struct ltdb_private *ltdb = module->private_data;
if (tdb_transaction_commit(ltdb->tdb) != 0) {
return ltdb_err_map(tdb_error(ltdb->tdb));
}
return LDB_SUCCESS;
}
static int ltdb_del_trans(struct ldb_module *module)
{
struct ltdb_private *ltdb = module->private_data;
if (tdb_transaction_cancel(ltdb->tdb) != 0) {
return ltdb_err_map(tdb_error(ltdb->tdb));
}
return LDB_SUCCESS;
}
static int ltdb_async_wait(struct ldb_async_handle *handle, enum ldb_async_wait_type type)
{
return handle->status;
}
static int ltdb_request(struct ldb_module *module, struct ldb_request *req)
{
/* check for oustanding critical controls and return an error if found */
if (req->controls != NULL) {
ldb_debug(module->ldb, LDB_DEBUG_WARNING, "Controls should not reach the ldb_tdb backend!\n");
if (check_critical_controls(req->controls)) {
return LDB_ERR_UNSUPPORTED_CRITICAL_EXTENSION;
}
}
/* search, add, modify, delete, rename are handled by their own, no other op supported */
return LDB_ERR_OPERATIONS_ERROR;
}
/*
return sequenceNumber from @BASEINFO
*/
static int ltdb_sequence_number(struct ldb_module *module, struct ldb_request *req)
{
TALLOC_CTX *tmp_ctx = talloc_new(req);
struct ldb_message *msg = NULL;
struct ldb_dn *dn = ldb_dn_explode(tmp_ctx, "@BASEINFO");
int tret;
if (tmp_ctx == NULL) {
talloc_free(tmp_ctx);
return LDB_ERR_OPERATIONS_ERROR;
}
msg = talloc(tmp_ctx, struct ldb_message);
if (msg == NULL) {
talloc_free(tmp_ctx);
return LDB_ERR_OPERATIONS_ERROR;
}
tret = ltdb_search_dn1(module, dn, msg);
if (tret != 1) {
talloc_free(tmp_ctx);
req->op.seq_num.seq_num = 0;
/* zero is as good as anything when we don't know */
return LDB_SUCCESS;
}
req->op.seq_num.seq_num = ldb_msg_find_uint64(msg, "sequenceNumber", 0);
talloc_free(tmp_ctx);
return LDB_SUCCESS;
}
static const struct ldb_module_ops ltdb_ops = {
.name = "tdb",
.search = ltdb_search,
.add = ltdb_add,
.modify = ltdb_modify,
.del = ltdb_delete,
.rename = ltdb_rename,
.request = ltdb_request,
.start_transaction = ltdb_start_trans,
.end_transaction = ltdb_end_trans,
.del_transaction = ltdb_del_trans,
.async_wait = ltdb_async_wait,
.sequence_number = ltdb_sequence_number
};
/*
connect to the database
*/
static int ltdb_connect(struct ldb_context *ldb, const char *url,
unsigned int flags, const char *options[],
struct ldb_module **module)
{
const char *path;
int tdb_flags, open_flags;
struct ltdb_private *ltdb;
/* parse the url */
if (strchr(url, ':')) {
if (strncmp(url, "tdb://", 6) != 0) {
ldb_debug(ldb, LDB_DEBUG_ERROR, "Invalid tdb URL '%s'", url);
return -1;
}
path = url+6;
} else {
path = url;
}
tdb_flags = TDB_DEFAULT;
/* check for the 'nosync' option */
if (flags & LDB_FLG_NOSYNC) {
tdb_flags |= TDB_NOSYNC;
}
if (flags & LDB_FLG_RDONLY) {
open_flags = O_RDONLY;
} else {
open_flags = O_CREAT | O_RDWR;
}
ltdb = talloc_zero(ldb, struct ltdb_private);
if (!ltdb) {
ldb_oom(ldb);
return -1;
}
/* note that we use quite a large default hash size */
ltdb->tdb = ltdb_wrap_open(ltdb, path, 10000, tdb_flags, open_flags, 0666);
if (!ltdb->tdb) {
ldb_debug(ldb, LDB_DEBUG_ERROR, "Unable to open tdb '%s'\n", path);
talloc_free(ltdb);
return -1;
}
ltdb->sequence_number = 0;
*module = talloc(ldb, struct ldb_module);
if (!module) {
ldb_oom(ldb);
talloc_free(ltdb);
return -1;
}
(*module)->ldb = ldb;
(*module)->prev = (*module)->next = NULL;
(*module)->private_data = ltdb;
(*module)->ops = <db_ops;
return 0;
}
int ldb_tdb_init(void)
{
return ldb_register_backend("tdb", ltdb_connect);
}
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