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-rw-r--r--ldb/ldb_tdb/ldb_tdb.c1236
1 files changed, 0 insertions, 1236 deletions
diff --git a/ldb/ldb_tdb/ldb_tdb.c b/ldb/ldb_tdb/ldb_tdb.c
deleted file mode 100644
index ea460def6..000000000
--- a/ldb/ldb_tdb/ldb_tdb.c
+++ /dev/null
@@ -1,1236 +0,0 @@
-/*
- ldb database library
-
- Copyright (C) Andrew Tridgell 2004
- Copyright (C) Stefan Metzmacher 2004
- Copyright (C) Simo Sorce 2006-2008
-
-
- ** 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 3 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, see <http://www.gnu.org/licenses/>.
-*/
-
-/*
- * 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
- *
- * - description: make it possible to use event contexts
- * date: Jan 2008
- * Author: Simo Sorce
- */
-
-#include "ldb_includes.h"
-
-#include "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;
-}
-
-/*
- lock the database for read - use by ltdb_search and ltdb_sequence_number
-*/
-int ltdb_lock_read(struct ldb_module *module)
-{
- struct ltdb_private *ltdb = (struct ltdb_private *)module->private_data;
- if (ltdb->in_transaction == 0) {
- return tdb_lockall_read(ltdb->tdb);
- }
- return 0;
-}
-
-/*
- unlock the database after a ltdb_lock_read()
-*/
-int ltdb_unlock_read(struct ldb_module *module)
-{
- struct ltdb_private *ltdb = (struct ltdb_private *)module->private_data;
- if (ltdb->in_transaction == 0) {
- return tdb_unlockall_read(ltdb->tdb);
- }
- return 0;
-}
-
-
-/*
- 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, struct ldb_dn *dn)
-{
- struct ldb_context *ldb = module->ldb;
- TDB_DATA key;
- char *key_str = NULL;
- const 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_get_casefold(dn);
- if (!dn_folded) {
- goto failed;
- }
-
- key_str = talloc_strdup(ldb, "DN=");
- if (!key_str) {
- goto failed;
- }
-
- key_str = talloc_strdup_append_buffer(key_str, 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
-*/
-static 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) {
- ldb_set_errstring(module->ldb, "Invalid attribute value in an @ATTRIBUTES entry");
- 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, struct ldb_dn *dn)
-{
- int ret = LDB_SUCCESS;
-
- 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 == LDB_SUCCESS &&
- !(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 =
- talloc_get_type(module->private_data, struct ltdb_private);
- 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 != LDB_SUCCESS) {
- 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_ERR_ENTRY_ALREADY_EXISTS) {
- ldb_asprintf_errstring(module->ldb,
- "Entry %s already exists",
- ldb_dn_get_linearized(msg->dn));
- return ret;
- }
-
- if (ret == LDB_SUCCESS) {
- ret = ltdb_index_one(module, msg, 1);
- if (ret != LDB_SUCCESS) {
- return ret;
- }
-
- ret = ltdb_modified(module, msg->dn);
- if (ret != LDB_SUCCESS) {
- return ret;
- }
- }
-
- return ret;
-}
-
-/*
- add a record to the database
-*/
-static int ltdb_add(struct ltdb_context *ctx)
-{
- struct ldb_module *module = ctx->module;
- struct ldb_request *req = ctx->req;
- int tret;
-
- req->handle->state = LDB_ASYNC_PENDING;
-
- tret = ltdb_add_internal(module, req->op.add.message);
- if (tret != LDB_SUCCESS) {
- return tret;
- }
-
- return LDB_SUCCESS;
-}
-
-/*
- delete a record from the database, not updating indexes (used for deleting
- index records)
-*/
-int ltdb_delete_noindex(struct ldb_module *module, struct ldb_dn *dn)
-{
- struct ltdb_private *ltdb =
- talloc_get_type(module->private_data, struct ltdb_private);
- 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, 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 != LDB_SUCCESS) {
- /* not finding the old record is an error */
- goto done;
- }
-
- ret = ltdb_delete_noindex(module, dn);
- if (ret != LDB_SUCCESS) {
- goto done;
- }
-
- /* remove one level attribute */
- ret = ltdb_index_one(module, msg, 0);
- if (ret != LDB_SUCCESS) {
- goto done;
- }
-
- /* remove any indexed attributes */
- ret = ltdb_index_del(module, msg);
- if (ret != LDB_SUCCESS) {
- goto done;
- }
-
- ret = ltdb_modified(module, dn);
- if (ret != LDB_SUCCESS) {
- goto done;
- }
-
-done:
- talloc_free(msg);
- return ret;
-}
-
-/*
- delete a record from the database
-*/
-static int ltdb_delete(struct ltdb_context *ctx)
-{
- struct ldb_module *module = ctx->module;
- struct ldb_request *req = ctx->req;
- int tret;
-
- req->handle->state = LDB_ASYNC_PENDING;
-
- if (ltdb_cache_load(module) != 0) {
- return LDB_ERR_OPERATIONS_ERROR;
- }
-
- tret = ltdb_delete_internal(module, req->op.del.dn);
- if (tret != LDB_SUCCESS) {
- return tret;
- }
-
- return LDB_SUCCESS;
-}
-
-/*
- 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)
-{
- const char *dn;
- unsigned int i, j;
-
- dn = ldb_dn_get_linearized(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);
- }
- }
-
- 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_schema_attribute *a;
-
- found = find_element(msg, name);
- if (found == -1) {
- return -1;
- }
-
- el = &msg->elements[found];
-
- a = ldb_schema_attribute_by_name(ldb, el->name);
-
- for (i=0;i<el->num_values;i++) {
- if (a->syntax->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 =
- talloc_get_type(module->private_data, struct ltdb_private);
- TDB_DATA tdb_key, tdb_data;
- struct ldb_message *msg2;
- unsigned i, j;
- int ret, idx;
-
- 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;
- const 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 */
- idx = find_element(msg2, el->name);
-
- if (idx == -1) {
- if (msg_add_element(ldb, msg2, el) != 0) {
- ret = LDB_ERR_OTHER;
- goto failed;
- }
- continue;
- }
-
- el2 = &msg2->elements[idx];
-
- /* An attribute with this name already exists,
- * add all values if they don't already exist
- * (check both the other elements to be added,
- * and those already in the db). */
-
- for (j=0;j<el->num_values;j++) {
- if (ldb_msg_find_val(el2, &el->values[j])) {
- ldb_asprintf_errstring(module->ldb, "%s: value #%d already exists", el->name, j);
- ret = LDB_ERR_ATTRIBUTE_OR_VALUE_EXISTS;
- goto failed;
- }
- if (ldb_msg_find_val(el, &el->values[j]) != &el->values[j]) {
- ldb_asprintf_errstring(module->ldb, "%s: value #%d provided more than once", el->name, j);
- 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, el->name);
-
- for (j=0;j<el->num_values;j++) {
- if (ldb_msg_find_val(el, &el->values[j]) != &el->values[j]) {
- ldb_asprintf_errstring(module->ldb, "%s: value #%d provided more than once", el->name, j);
- ret = LDB_ERR_ATTRIBUTE_OR_VALUE_EXISTS;
- goto failed;
- }
- }
-
- /* add the replacement element, if not empty */
- if (el->num_values != 0 &&
- msg_add_element(ldb, msg2, el) != 0) {
- ret = LDB_ERR_OTHER;
- goto failed;
- }
- break;
-
- case LDB_FLAG_MOD_DELETE:
-
- dn = ldb_dn_get_linearized(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) {
- ldb_asprintf_errstring(module->ldb, "No such attribute: %s for delete on %s", msg->elements[i].name, dn);
- 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) {
- ldb_asprintf_errstring(module->ldb, "No matching attribute value when deleting attribute: %s on %s", msg->elements[i].name, dn);
- ret = LDB_ERR_NO_SUCH_ATTRIBUTE;
- goto failed;
- }
- ret = ltdb_index_del_value(module, dn, &msg->elements[i], j);
- if (ret != LDB_SUCCESS) {
- goto failed;
- }
- }
- break;
- default:
- ldb_asprintf_errstring(module->ldb,
- "Invalid ldb_modify flags on %s: 0x%x",
- msg->elements[i].name,
- msg->elements[i].flags & LDB_FLAG_MOD_MASK);
- 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;
- }
-
- ret = ltdb_modified(module, msg->dn);
- if (ret != LDB_SUCCESS) {
- 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 ltdb_context *ctx)
-{
- struct ldb_module *module = ctx->module;
- struct ldb_request *req = ctx->req;
- int tret;
-
- req->handle->state = LDB_ASYNC_PENDING;
-
- tret = ltdb_check_special_dn(module, req->op.mod.message);
- if (tret != LDB_SUCCESS) {
- return tret;
- }
-
- if (ltdb_cache_load(module) != 0) {
- return LDB_ERR_OPERATIONS_ERROR;
- }
-
- tret = ltdb_modify_internal(module, req->op.mod.message);
- if (tret != LDB_SUCCESS) {
- return tret;
- }
-
- return LDB_SUCCESS;
-}
-
-/*
- rename a record
-*/
-static int ltdb_rename(struct ltdb_context *ctx)
-{
- struct ldb_module *module = ctx->module;
- struct ldb_request *req = ctx->req;
- struct ldb_message *msg;
- int tret;
-
- req->handle->state = LDB_ASYNC_PENDING;
-
- if (ltdb_cache_load(ctx->module) != 0) {
- return LDB_ERR_OPERATIONS_ERROR;
- }
-
- msg = talloc(ctx, 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 */
- tret = ltdb_search_dn1(module, req->op.rename.olddn, msg);
- if (tret != LDB_SUCCESS) {
- /* not finding the old record is an error */
- return tret;
- }
-
- msg->dn = ldb_dn_copy(msg, req->op.rename.newdn);
- if (!msg->dn) {
- return LDB_ERR_OPERATIONS_ERROR;
- }
-
- if (ldb_dn_compare(req->op.rename.olddn, req->op.rename.newdn) == 0) {
- /* The rename operation is apparently only changing case -
- the DNs are the same. Delete the old DN before adding
- the new one to avoid a TDB_ERR_EXISTS error.
-
- The only drawback to this is that if the delete
- succeeds but the add fails, we rely on the
- transaction to roll this all back. */
- tret = ltdb_delete_internal(module, req->op.rename.olddn);
- if (tret != LDB_SUCCESS) {
- return tret;
- }
-
- tret = ltdb_add_internal(module, msg);
- if (tret != LDB_SUCCESS) {
- return tret;
- }
- } else {
- /* The rename operation is changing DNs. Try to add the new
- DN first to avoid clobbering another DN not related to
- this rename operation. */
- tret = ltdb_add_internal(module, msg);
- if (tret != LDB_SUCCESS) {
- return tret;
- }
-
- tret = ltdb_delete_internal(module, req->op.rename.olddn);
- if (tret != LDB_SUCCESS) {
- ltdb_delete_internal(module, req->op.rename.newdn);
- return LDB_ERR_OPERATIONS_ERROR;
- }
- }
-
- return LDB_SUCCESS;
-}
-
-static int ltdb_start_trans(struct ldb_module *module)
-{
- struct ltdb_private *ltdb =
- talloc_get_type(module->private_data, struct ltdb_private);
-
- if (tdb_transaction_start(ltdb->tdb) != 0) {
- return ltdb_err_map(tdb_error(ltdb->tdb));
- }
-
- ltdb->in_transaction++;
-
- ltdb_index_transaction_start(module);
-
- return LDB_SUCCESS;
-}
-
-static int ltdb_end_trans(struct ldb_module *module)
-{
- struct ltdb_private *ltdb =
- talloc_get_type(module->private_data, struct ltdb_private);
-
- ltdb->in_transaction--;
-
- if (ltdb_index_transaction_commit(module) != 0) {
- return ltdb_err_map(tdb_error(ltdb->tdb));
- }
-
- 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 =
- talloc_get_type(module->private_data, struct ltdb_private);
-
- ltdb->in_transaction--;
-
- if (ltdb_index_transaction_cancel(module) != 0) {
- return ltdb_err_map(tdb_error(ltdb->tdb));
- }
-
- if (tdb_transaction_cancel(ltdb->tdb) != 0) {
- return ltdb_err_map(tdb_error(ltdb->tdb));
- }
-
- return LDB_SUCCESS;
-}
-
-/*
- return sequenceNumber from @BASEINFO
-*/
-static int ltdb_sequence_number(struct ltdb_context *ctx,
- struct ldb_extended **ext)
-{
- struct ldb_module *module = ctx->module;
- struct ldb_request *req = ctx->req;
- TALLOC_CTX *tmp_ctx;
- struct ldb_seqnum_request *seq;
- struct ldb_seqnum_result *res;
- struct ldb_message *msg = NULL;
- struct ldb_dn *dn;
- const char *date;
- int ret;
-
- seq = talloc_get_type(req->op.extended.data,
- struct ldb_seqnum_request);
- if (seq == NULL) {
- return LDB_ERR_OPERATIONS_ERROR;
- }
-
- req->handle->state = LDB_ASYNC_PENDING;
-
- if (ltdb_lock_read(module) != 0) {
- return LDB_ERR_OPERATIONS_ERROR;
- }
-
- res = talloc_zero(req, struct ldb_seqnum_result);
- if (res == NULL) {
- ret = LDB_ERR_OPERATIONS_ERROR;
- goto done;
- }
- tmp_ctx = talloc_new(req);
- if (tmp_ctx == NULL) {
- ret = LDB_ERR_OPERATIONS_ERROR;
- goto done;
- }
-
- dn = ldb_dn_new(tmp_ctx, module->ldb, LTDB_BASEINFO);
-
- msg = talloc(tmp_ctx, struct ldb_message);
- if (msg == NULL) {
- ret = LDB_ERR_OPERATIONS_ERROR;
- goto done;
- }
-
- ret = ltdb_search_dn1(module, dn, msg);
- if (ret != LDB_SUCCESS) {
- goto done;
- }
-
- switch (seq->type) {
- case LDB_SEQ_HIGHEST_SEQ:
- res->seq_num = ldb_msg_find_attr_as_uint64(msg, LTDB_SEQUENCE_NUMBER, 0);
- break;
- case LDB_SEQ_NEXT:
- res->seq_num = ldb_msg_find_attr_as_uint64(msg, LTDB_SEQUENCE_NUMBER, 0);
- res->seq_num++;
- break;
- case LDB_SEQ_HIGHEST_TIMESTAMP:
- date = ldb_msg_find_attr_as_string(msg, LTDB_MOD_TIMESTAMP, NULL);
- if (date) {
- res->seq_num = ldb_string_to_time(date);
- } else {
- res->seq_num = 0;
- /* zero is as good as anything when we don't know */
- }
- break;
- }
-
- *ext = talloc_zero(req, struct ldb_extended);
- if (*ext == NULL) {
- ret = LDB_ERR_OPERATIONS_ERROR;
- goto done;
- }
- (*ext)->oid = LDB_EXTENDED_SEQUENCE_NUMBER;
- (*ext)->data = talloc_steal(*ext, res);
-
- ret = LDB_SUCCESS;
-
-done:
- talloc_free(tmp_ctx);
- ltdb_unlock_read(module);
- return ret;
-}
-
-static void ltdb_request_done(struct ldb_request *req, int error)
-{
- struct ldb_reply *ares;
-
- /* if we already returned an error just return */
- if (req->handle->status != LDB_SUCCESS) {
- return;
- }
-
- ares = talloc_zero(req, struct ldb_reply);
- if (!ares) {
- ldb_oom(req->handle->ldb);
- req->callback(req, NULL);
- return;
- }
- ares->type = LDB_REPLY_DONE;
- ares->error = error;
-
- req->callback(req, ares);
-}
-
-static void ltdb_timeout(struct event_context *ev,
- struct timed_event *te,
- struct timeval t,
- void *private_data)
-{
- struct ltdb_context *ctx;
- ctx = talloc_get_type(private_data, struct ltdb_context);
-
- ltdb_request_done(ctx->req, LDB_ERR_TIME_LIMIT_EXCEEDED);
-}
-
-static void ltdb_request_extended_done(struct ldb_request *req,
- struct ldb_extended *ext,
- int error)
-{
- struct ldb_reply *ares;
-
- /* if we already returned an error just return */
- if (req->handle->status != LDB_SUCCESS) {
- return;
- }
-
- ares = talloc_zero(req, struct ldb_reply);
- if (!ares) {
- ldb_oom(req->handle->ldb);
- req->callback(req, NULL);
- return;
- }
- ares->type = LDB_REPLY_DONE;
- ares->response = ext;
- ares->error = error;
-
- req->callback(req, ares);
-}
-
-static void ltdb_handle_extended(struct ltdb_context *ctx)
-{
- struct ldb_extended *ext = NULL;
- int ret;
-
- if (strcmp(ctx->req->op.extended.oid,
- LDB_EXTENDED_SEQUENCE_NUMBER) == 0) {
- /* get sequence number */
- ret = ltdb_sequence_number(ctx, &ext);
- } else {
- /* not recognized */
- ret = LDB_ERR_UNSUPPORTED_CRITICAL_EXTENSION;
- }
-
- ltdb_request_extended_done(ctx->req, ext, ret);
-}
-
-static void ltdb_callback(struct event_context *ev,
- struct timed_event *te,
- struct timeval t,
- void *private_data)
-{
- struct ltdb_context *ctx;
- int ret;
-
- ctx = talloc_get_type(private_data, struct ltdb_context);
-
- switch (ctx->req->operation) {
- case LDB_SEARCH:
- ret = ltdb_search(ctx);
- break;
- case LDB_ADD:
- ret = ltdb_add(ctx);
- break;
- case LDB_MODIFY:
- ret = ltdb_modify(ctx);
- break;
- case LDB_DELETE:
- ret = ltdb_delete(ctx);
- break;
- case LDB_RENAME:
- ret = ltdb_rename(ctx);
- break;
- case LDB_EXTENDED:
- ltdb_handle_extended(ctx);
- return;
- default:
- /* no other op supported */
- ret = LDB_ERR_UNWILLING_TO_PERFORM;
- }
-
- if (!ctx->callback_failed) {
- /* Once we are done, we do not need timeout events */
- talloc_free(ctx->timeout_event);
- ltdb_request_done(ctx->req, ret);
- }
-}
-
-static int ltdb_handle_request(struct ldb_module *module,
- struct ldb_request *req)
-{
- struct event_context *ev;
- struct ltdb_context *ac;
- struct timed_event *te;
- struct timeval tv;
-
- if (check_critical_controls(req->controls)) {
- return LDB_ERR_UNSUPPORTED_CRITICAL_EXTENSION;
- }
-
- if (req->starttime == 0 || req->timeout == 0) {
- ldb_set_errstring(module->ldb, "Invalid timeout settings");
- return LDB_ERR_TIME_LIMIT_EXCEEDED;
- }
-
- ev = ldb_get_event_context(module->ldb);
-
- ac = talloc_zero(req, struct ltdb_context);
- if (ac == NULL) {
- ldb_set_errstring(module->ldb, "Out of Memory");
- return LDB_ERR_OPERATIONS_ERROR;
- }
-
- ac->module = module;
- ac->req = req;
-
- tv.tv_sec = 0;
- tv.tv_usec = 0;
- te = event_add_timed(ev, ac, tv, ltdb_callback, ac);
- if (NULL == te) {
- return LDB_ERR_OPERATIONS_ERROR;
- }
-
- tv.tv_sec = req->starttime + req->timeout;
- ac->timeout_event = event_add_timed(ev, ac, tv, ltdb_timeout, ac);
- if (NULL == ac->timeout_event) {
- return LDB_ERR_OPERATIONS_ERROR;
- }
-
- return LDB_SUCCESS;
-}
-
-static const struct ldb_module_ops ltdb_ops = {
- .name = "tdb",
- .search = ltdb_handle_request,
- .add = ltdb_handle_request,
- .modify = ltdb_handle_request,
- .del = ltdb_handle_request,
- .rename = ltdb_handle_request,
- .extended = ltdb_handle_request,
- .start_transaction = ltdb_start_trans,
- .end_transaction = ltdb_end_trans,
- .del_transaction = ltdb_del_trans,
-};
-
-/*
- 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 | TDB_SEQNUM;
-
- /* check for the 'nosync' option */
- if (flags & LDB_FLG_NOSYNC) {
- tdb_flags |= TDB_NOSYNC;
- }
-
- /* and nommap option */
- if (flags & LDB_FLG_NOMMAP) {
- tdb_flags |= TDB_NOMMAP;
- }
-
- 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,
- ldb->create_perms, ldb);
- 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) == NULL) {
- ldb_oom(ldb);
- talloc_free(ltdb);
- return -1;
- }
- talloc_set_name_const(*module, "ldb_tdb backend");
- (*module)->ldb = ldb;
- (*module)->prev = (*module)->next = NULL;
- (*module)->private_data = ltdb;
- (*module)->ops = &ltdb_ops;
-
- if (ltdb_cache_load(*module) != 0) {
- talloc_free(*module);
- talloc_free(ltdb);
- return -1;
- }
-
- return 0;
-}
-
-const struct ldb_backend_ops ldb_tdb_backend_ops = {
- .name = "tdb",
- .connect_fn = ltdb_connect
-};