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authorKamen Mazdrashki <kamenim@samba.org>2010-03-23 16:44:02 +0200
committerKamen Mazdrashki <kamenim@samba.org>2010-04-09 12:21:26 +0300
commit9d1f8bcca9e39d1e0caa9377f30c290b0738f080 (patch)
treefb10e16f0ebb6f7189ce80060c7ced512d2a1cd8
parent37a6b66344ae5832bd3db71983bf75c1309e5b9d (diff)
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s4/dsdb: dsdb_schema_info object implementation
-rw-r--r--source4/dsdb/config.mk3
-rw-r--r--source4/dsdb/schema/schema_info_attr.c383
2 files changed, 385 insertions, 1 deletions
diff --git a/source4/dsdb/config.mk b/source4/dsdb/config.mk
index 2bd19e987d..4363399bc3 100644
--- a/source4/dsdb/config.mk
+++ b/source4/dsdb/config.mk
@@ -42,7 +42,8 @@ SAMDB_SCHEMA_OBJ_FILES = $(addprefix $(dsdbsrcdir)/schema/, \
schema_description.o \
schema_convert_to_ol.o \
schema_inferiors.o \
- schema_prefixmap.o)
+ schema_prefixmap.o \
+ schema_info_attr.o)
$(eval $(call proto_header_template,$(dsdbsrcdir)/schema/proto.h,$(SAMDB_SCHEMA_OBJ_FILES:.o=.c)))
# PUBLIC_HEADERS += dsdb/schema/schema.h
diff --git a/source4/dsdb/schema/schema_info_attr.c b/source4/dsdb/schema/schema_info_attr.c
new file mode 100644
index 0000000000..2d3dfc827c
--- /dev/null
+++ b/source4/dsdb/schema/schema_info_attr.c
@@ -0,0 +1,383 @@
+/*
+ Unix SMB/CIFS implementation.
+
+ SCHEMA::schemaInfo implementation
+
+ Copyright (C) Kamen Mazdrashki <kamenim@samba.org> 2010
+
+ 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 "dsdb/common/util.h"
+#include "dsdb/samdb/samdb.h"
+#include "dsdb/samdb/ldb_modules/util.h"
+#include "lib/ldb/include/ldb_module.h"
+#include "librpc/gen_ndr/ndr_drsuapi.h"
+#include "librpc/gen_ndr/ndr_drsblobs.h"
+#include "param/param.h"
+
+
+/**
+ * Parse schemaInfo structure from a data_blob
+ * (DATA_BLOB or ldb_val).
+ * Suitable for parsing blobs that comes from
+ * DRS interface of from LDB database
+ */
+WERROR dsdb_schema_info_from_blob(const DATA_BLOB *blob,
+ TALLOC_CTX *mem_ctx, struct dsdb_schema_info **_schema_info)
+{
+ TALLOC_CTX *temp_ctx;
+ enum ndr_err_code ndr_err;
+ struct dsdb_schema_info *schema_info;
+ struct schemaInfoBlob schema_info_blob;
+
+ if (!blob || !blob->data) {
+ return WERR_INVALID_PARAMETER;
+ }
+
+ if (blob->length != 21) {
+ return WERR_INVALID_PARAMETER;
+ }
+
+ /* schemaInfo blob should start with 0xFF */
+ if (blob->data[0] != 0xFF) {
+ return WERR_INVALID_PARAMETER;
+ }
+
+ temp_ctx = talloc_new(mem_ctx);
+ W_ERROR_HAVE_NO_MEMORY(temp_ctx);
+
+ ndr_err = ndr_pull_struct_blob_all(blob, temp_ctx,
+ lp_iconv_convenience(NULL), &schema_info_blob,
+ (ndr_pull_flags_fn_t)ndr_pull_schemaInfoBlob);
+ if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
+ NTSTATUS nt_status = ndr_map_error2ntstatus(ndr_err);
+ talloc_free(temp_ctx);
+ return ntstatus_to_werror(nt_status);
+ }
+
+ /* revision must be not less than 1 */
+ if (schema_info_blob.revision < 1) {
+ talloc_free(temp_ctx);
+ return WERR_INVALID_PARAMETER;
+ }
+
+ schema_info = talloc(mem_ctx, struct dsdb_schema_info);
+ if (!schema_info) {
+ talloc_free(temp_ctx);
+ return WERR_NOMEM;
+ }
+ schema_info->revision = schema_info_blob.revision;
+ schema_info->invocation_id = schema_info_blob.invocation_id;
+ *_schema_info = schema_info;
+
+ talloc_free(temp_ctx);
+ return WERR_OK;
+}
+
+/**
+ * Creates a blob from schemaInfo structure
+ * Suitable for packing schemaInfo into a blob
+ * which is to be used in DRS interface of LDB database
+ */
+WERROR dsdb_blob_from_schema_info(const struct dsdb_schema_info *schema_info,
+ TALLOC_CTX *mem_ctx, DATA_BLOB *blob)
+{
+ enum ndr_err_code ndr_err;
+ struct schemaInfoBlob schema_info_blob;
+
+ if (schema_info->revision < 1) {
+ return WERR_INVALID_PARAMETER;
+ }
+
+ schema_info_blob.marker = 0xFF;
+ schema_info_blob.revision = schema_info->revision;
+ schema_info_blob.invocation_id = schema_info->invocation_id;
+
+ ndr_err = ndr_push_struct_blob(blob, mem_ctx,
+ lp_iconv_convenience(NULL), &schema_info_blob,
+ (ndr_push_flags_fn_t)ndr_push_schemaInfoBlob);
+ if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
+ NTSTATUS nt_status = ndr_map_error2ntstatus(ndr_err);
+ return ntstatus_to_werror(nt_status);
+ }
+
+ return WERR_OK;
+}
+
+
+/**
+ * Reads schema_info structure from schemaInfo
+ * attribute on SCHEMA partition
+ *
+ * @param dsdb_flags DSDB_FLAG_... flag of 0
+ */
+WERROR dsdb_module_schema_info_blob_read(struct ldb_module *ldb_module,
+ uint32_t dsdb_flags,
+ TALLOC_CTX *mem_ctx, DATA_BLOB *schema_info_blob)
+{
+ int ldb_err;
+ const struct ldb_val *blob_val;
+ struct ldb_dn *schema_dn;
+ struct ldb_result *schema_res = NULL;
+ static const char *schema_attrs[] = {
+ "schemaInfo",
+ NULL
+ };
+
+ schema_dn = samdb_schema_dn(ldb_module_get_ctx(ldb_module));
+ if (!schema_dn) {
+ DEBUG(0,("dsdb_module_schema_info_blob_read: no schema dn present!\n"));
+ return WERR_INTERNAL_DB_CORRUPTION;
+ }
+
+ ldb_err = dsdb_module_search(ldb_module, mem_ctx, &schema_res, schema_dn,
+ LDB_SCOPE_BASE, schema_attrs, dsdb_flags, NULL);
+ if (ldb_err == LDB_ERR_NO_SUCH_OBJECT) {
+ DEBUG(0,("dsdb_module_schema_info_blob_read: Schema DN not found!\n"));
+ talloc_free(schema_res);
+ return WERR_INTERNAL_DB_CORRUPTION;
+ } else if (ldb_err != LDB_SUCCESS) {
+ DEBUG(0,("dsdb_module_schema_info_blob_read: failed to find schemaInfo attribute\n"));
+ talloc_free(schema_res);
+ return WERR_INTERNAL_DB_CORRUPTION;
+ }
+
+ blob_val = ldb_msg_find_ldb_val(schema_res->msgs[0], "schemaInfo");
+ if (!blob_val) {
+ DEBUG(0,("dsdb_module_schema_info_blob_read: no schemaInfo attribute found\n"));
+ talloc_free(schema_res);
+ return WERR_DS_NO_ATTRIBUTE_OR_VALUE;
+ }
+
+ /* transfer .data ownership to mem_ctx */
+ schema_info_blob->length = blob_val->length;
+ schema_info_blob->data = talloc_steal(mem_ctx, blob_val->data);
+
+ talloc_free(schema_res);
+
+ return WERR_OK;
+}
+
+/**
+ * Writes schema_info structure into schemaInfo
+ * attribute on SCHEMA partition
+ *
+ * @param dsdb_flags DSDB_FLAG_... flag of 0
+ */
+WERROR dsdb_module_schema_info_blob_write(struct ldb_module *ldb_module,
+ uint32_t dsdb_flags,
+ DATA_BLOB *schema_info_blob)
+{
+ int ldb_err;
+ struct ldb_message *msg;
+ struct ldb_dn *schema_dn;
+ struct ldb_message_element *return_el;
+ TALLOC_CTX *temp_ctx;
+
+ schema_dn = samdb_schema_dn(ldb_module_get_ctx(ldb_module));
+ if (!schema_dn) {
+ DEBUG(0,("dsdb_module_schema_info_blob_write: no schema dn present\n"));
+ return WERR_INTERNAL_DB_CORRUPTION;
+ }
+
+ temp_ctx = talloc_new(ldb_module);
+ W_ERROR_HAVE_NO_MEMORY(temp_ctx);
+
+ /* write serialized schemaInfo into LDB */
+ msg = ldb_msg_new(temp_ctx);
+ if (!msg) {
+ talloc_free(temp_ctx);
+ return WERR_NOMEM;
+ }
+
+ msg->dn = schema_dn;
+ ldb_err = ldb_msg_add_value(msg, "schemaInfo", schema_info_blob, &return_el);
+ if (ldb_err != 0) {
+ talloc_free(temp_ctx);
+ DEBUG(0,("dsdb_module_schema_info_blob_write: ldb_msg_add_value failed\n"));
+ return WERR_NOMEM;
+ }
+
+ /* mark schemaInfo element for replacement */
+ return_el->flags = LDB_FLAG_MOD_REPLACE;
+
+ ldb_err = dsdb_module_modify(ldb_module, msg, dsdb_flags | DSDB_MODIFY_PERMISSIVE);
+
+ talloc_free(temp_ctx);
+
+ if (ldb_err != 0) {
+ DEBUG(0,("dsdb_module_schema_info_blob_write: dsdb_replace failed: %s (%s)\n",
+ ldb_strerror(ldb_err),
+ ldb_errstring(ldb_module_get_ctx(ldb_module))));
+ return WERR_INTERNAL_DB_ERROR;
+ }
+
+ return WERR_OK;
+}
+
+
+/**
+ * Reads schema_info structure from schemaInfo
+ * attribute on SCHEMA partition
+ */
+static WERROR dsdb_module_schema_info_read(struct ldb_module *ldb_module,
+ uint32_t dsdb_flags,
+ TALLOC_CTX *mem_ctx,
+ struct dsdb_schema_info **_schema_info)
+{
+ WERROR werr;
+ DATA_BLOB ndr_blob;
+ TALLOC_CTX *temp_ctx;
+
+ temp_ctx = talloc_new(mem_ctx);
+ W_ERROR_HAVE_NO_MEMORY(temp_ctx);
+
+ /* read serialized schemaInfo from LDB */
+ werr = dsdb_module_schema_info_blob_read(ldb_module, dsdb_flags, temp_ctx, &ndr_blob);
+ if (!W_ERROR_IS_OK(werr)) {
+ talloc_free(temp_ctx);
+ return werr;
+ }
+
+ /* convert NDR blob to dsdb_schema_info object */
+ werr = dsdb_schema_info_from_blob(&ndr_blob,
+ mem_ctx,
+ _schema_info);
+ talloc_free(temp_ctx);
+
+ return werr;
+}
+
+/**
+ * Writes schema_info structure into schemaInfo
+ * attribute on SCHEMA partition
+ *
+ * @param dsdb_flags DSDB_FLAG_... flag of 0
+ */
+static WERROR dsdb_module_schema_info_write(struct ldb_module *ldb_module,
+ uint32_t dsdb_flags,
+ const struct dsdb_schema_info *schema_info)
+{
+ WERROR werr;
+ DATA_BLOB ndr_blob;
+ TALLOC_CTX *temp_ctx;
+
+ temp_ctx = talloc_new(ldb_module);
+ W_ERROR_HAVE_NO_MEMORY(temp_ctx);
+
+ /* convert schema_info to a blob */
+ werr = dsdb_blob_from_schema_info(schema_info, temp_ctx, &ndr_blob);
+ if (!W_ERROR_IS_OK(werr)) {
+ talloc_free(temp_ctx);
+ return werr;
+ }
+
+ /* write serialized schemaInfo into LDB */
+ werr = dsdb_module_schema_info_blob_write(ldb_module, dsdb_flags, &ndr_blob);
+
+ talloc_free(temp_ctx);
+
+ return werr;
+}
+
+
+/**
+ * Creates new dsdb_schema_info object using
+ * invocationId from supplied ldb
+ */
+WERROR dsdb_schema_info_create(struct ldb_context *ldb, TALLOC_CTX *mem_ctx, struct dsdb_schema_info **_schema_info)
+{
+ const struct GUID *invocation_id;
+ struct dsdb_schema_info *schema_info;
+
+ /* try to determine invocationId from ldb */
+ invocation_id = samdb_ntds_invocation_id(ldb);
+
+ schema_info = talloc(mem_ctx, struct dsdb_schema_info);
+ if (!schema_info) {
+ return WERR_NOMEM;
+ }
+
+ schema_info->revision = 1;
+ if (invocation_id) {
+ schema_info->invocation_id = *invocation_id;
+ } else {
+ schema_info->invocation_id = GUID_zero();
+ }
+
+ *_schema_info = schema_info;
+
+ return WERR_OK;
+}
+
+
+/**
+ * Increments schemaInfo revision and save it to DB
+ * setting our invocationID in the process
+ * NOTE: this function should be called in a transaction
+ * much in the same way prefixMap update function is called
+ *
+ * @param ldb_module current module
+ * @param schema schema cache
+ * @param dsdb_flags DSDB_FLAG_... flag of 0
+ */
+WERROR dsdb_module_schema_info_update(struct ldb_module *ldb_module,
+ struct dsdb_schema *schema,
+ int dsdb_flags)
+{
+ WERROR werr;
+ const struct GUID *invocation_id;
+ struct dsdb_schema_info *schema_info;
+
+ TALLOC_CTX *mem_ctx = talloc_new(schema);
+ W_ERROR_HAVE_NO_MEMORY(mem_ctx);
+
+ invocation_id = samdb_ntds_invocation_id(ldb_module_get_ctx(ldb_module));
+ if (!invocation_id) {
+ return WERR_INTERNAL_DB_CORRUPTION;
+ }
+
+ werr = dsdb_module_schema_info_read(ldb_module, dsdb_flags,
+ mem_ctx, &schema_info);
+ if (!W_ERROR_IS_OK(werr)) {
+ DEBUG(0,("dsdb_module_schema_info_update: failed to reload schemaInfo - %s\n",
+ win_errstr(werr)));
+ talloc_free(mem_ctx);
+ return werr;
+ }
+
+ /* update schemaInfo */
+ schema_info->revision++;
+ schema_info->invocation_id = *invocation_id;
+
+ werr = dsdb_module_schema_info_write(ldb_module, dsdb_flags, schema_info);
+ if (!W_ERROR_IS_OK(werr)) {
+ DEBUG(0,("dsdb_module_schema_info_update: failed to save schemaInfo - %s\n",
+ win_errstr(werr)));
+ talloc_free(mem_ctx);
+ return werr;
+ }
+
+ /* finally, update schema_info in the cache */
+ /* TODO: update schema_info in dsdb_schema cache */
+/*
+ talloc_unlink(schema, discard_const(schema->schema_info));
+ schema->schema_info = talloc_steal(schema, schema_info);
+*/
+
+ talloc_free(mem_ctx);
+ return WERR_OK;
+}