--- /dev/null
+/*
+ Unix SMB/CIFS implementation.
+ Map lease keys to file ids
+ Copyright (C) Volker Lendecke 2013
+
+ 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 "system/filesys.h"
+#include "locking/leases_db.h"
+#include "dbwrap/dbwrap.h"
+#include "dbwrap/dbwrap_open.h"
+#include "util_tdb.h"
+#include "ndr.h"
+#include "librpc/gen_ndr/ndr_leases_db.h"
+
+#undef DBGC_CLASS
+#define DBGC_CLASS DBGC_LOCKING
+
+/* the leases database handle */
+static struct db_context *leases_db;
+
+bool leases_db_init(bool read_only)
+{
+ if (leases_db) {
+ return true;
+ }
+
+ leases_db = db_open(NULL, lock_path("leases.tdb"), 0,
+ TDB_DEFAULT|TDB_VOLATILE|TDB_CLEAR_IF_FIRST|
+ TDB_INCOMPATIBLE_HASH,
+ read_only ? O_RDONLY : O_RDWR|O_CREAT, 0644,
+ DBWRAP_LOCK_ORDER_2, DBWRAP_FLAG_NONE);
+
+ if (leases_db == NULL) {
+ DEBUG(1, ("ERROR: Failed to initialise leases database\n"));
+ return false;
+ }
+
+ return true;
+}
+
+static bool leases_db_key(TALLOC_CTX *mem_ctx,
+ const struct GUID *client_guid,
+ const struct smb2_lease_key *lease_key,
+ TDB_DATA *key)
+{
+ struct leases_db_key db_key = {
+ .client_guid = *client_guid,
+ .lease_key = *lease_key };
+ DATA_BLOB blob;
+ enum ndr_err_code ndr_err;
+
+ if (DEBUGLEVEL >= 10) {
+ DEBUG(10, ("%s:\n", __func__));
+ NDR_PRINT_DEBUG(leases_db_key, &db_key);
+ }
+
+ ndr_err = ndr_push_struct_blob(
+ &blob, mem_ctx, &db_key,
+ (ndr_push_flags_fn_t)ndr_push_leases_db_key);
+ if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
+ DEBUG(10, ("%s: ndr_push_struct_blob_failed: %s\n",
+ __func__, ndr_errstr(ndr_err)));
+ return false;
+ }
+
+ *key = make_tdb_data(blob.data, blob.length);
+ return true;
+}
+
+NTSTATUS leases_db_add(const struct GUID *client_guid,
+ const struct smb2_lease_key *lease_key,
+ const struct file_id *id,
+ const char *filename,
+ const char *stream_name)
+{
+ TDB_DATA db_key, db_value;
+ DATA_BLOB blob;
+ struct db_record *rec;
+ NTSTATUS status;
+ bool ok;
+ struct leases_db_value new_value;
+ struct leases_db_value *value = NULL;
+ enum ndr_err_code ndr_err;
+
+ if (!leases_db_init(false)) {
+ return NT_STATUS_INTERNAL_ERROR;
+ }
+
+ ok = leases_db_key(talloc_tos(), client_guid, lease_key, &db_key);
+ if (!ok) {
+ DEBUG(10, ("%s: leases_db_key failed\n", __func__));
+ return NT_STATUS_NO_MEMORY;
+ }
+
+ rec = dbwrap_fetch_locked(leases_db, talloc_tos(), db_key);
+ TALLOC_FREE(db_key.dptr);
+ if (rec == NULL) {
+ return NT_STATUS_INTERNAL_ERROR;
+ }
+
+ db_value = dbwrap_record_get_value(rec);
+ if (db_value.dsize != 0) {
+ uint32_t i;
+
+ DEBUG(10, ("%s: record exists\n", __func__));
+
+ value = talloc(talloc_tos(), struct leases_db_value);
+ if (value == NULL) {
+ status = NT_STATUS_NO_MEMORY;
+ goto out;
+ }
+
+ blob.data = db_value.dptr;
+ blob.length = db_value.dsize;
+
+ ndr_err = ndr_pull_struct_blob_all(
+ &blob, value, value,
+ (ndr_pull_flags_fn_t)ndr_pull_leases_db_value);
+ if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
+ DEBUG(10, ("%s: ndr_pull_struct_blob_failed: %s\n",
+ __func__, ndr_errstr(ndr_err)));
+ status = ndr_map_error2ntstatus(ndr_err);
+ goto out;
+ }
+
+ /* id must be unique. */
+ for (i = 0; i < value->num_file_ids; i++) {
+ if (file_id_equal(id, &value->ids[i])) {
+ status = NT_STATUS_OBJECT_NAME_COLLISION;
+ goto out;
+ }
+ }
+
+ value->ids = talloc_realloc(value, value->ids, struct file_id,
+ value->num_file_ids + 1);
+ if (value->ids == NULL) {
+ status = NT_STATUS_NO_MEMORY;
+ goto out;
+ }
+ value->ids[value->num_file_ids] = *id;
+ value->num_file_ids += 1;
+
+ } else {
+ DEBUG(10, ("%s: new record\n", __func__));
+
+ new_value = (struct leases_db_value) {
+ .num_file_ids = 1,
+ .ids = discard_const_p(struct file_id, id),
+ .filename = filename,
+ .stream_name = stream_name,
+ };
+ value = &new_value;
+ }
+
+ ndr_err = ndr_push_struct_blob(
+ &blob, talloc_tos(), value,
+ (ndr_push_flags_fn_t)ndr_push_leases_db_value);
+ if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
+ DEBUG(10, ("%s: ndr_push_struct_blob_failed: %s\n",
+ __func__, ndr_errstr(ndr_err)));
+ status = ndr_map_error2ntstatus(ndr_err);
+ goto out;
+ }
+
+ if (DEBUGLEVEL >= 10) {
+ DEBUG(10, ("%s:\n", __func__));
+ NDR_PRINT_DEBUG(leases_db_value, value);
+ }
+
+ db_value = make_tdb_data(blob.data, blob.length);
+
+ status = dbwrap_record_store(rec, db_value, 0);
+ if (!NT_STATUS_IS_OK(status)) {
+ DEBUG(10, ("%s: dbwrap_record_store returned %s\n",
+ __func__, nt_errstr(status)));
+ }
+
+ out:
+
+ if (value != &new_value) {
+ TALLOC_FREE(value);
+ }
+ TALLOC_FREE(rec);
+ return status;
+}
+
+NTSTATUS leases_db_del(const struct GUID *client_guid,
+ const struct smb2_lease_key *lease_key,
+ const struct file_id *id)
+{
+ TDB_DATA db_key, db_value;
+ struct db_record *rec;
+ NTSTATUS status;
+ struct leases_db_value *value;
+ enum ndr_err_code ndr_err;
+ DATA_BLOB blob;
+ uint32_t i;
+ bool ok;
+
+ if (!leases_db_init(false)) {
+ return NT_STATUS_INTERNAL_ERROR;
+ }
+
+ ok = leases_db_key(talloc_tos(), client_guid, lease_key, &db_key);
+ if (!ok) {
+ return NT_STATUS_NO_MEMORY;
+ }
+
+ rec = dbwrap_fetch_locked(leases_db, talloc_tos(), db_key);
+ TALLOC_FREE(db_key.dptr);
+ if (rec == NULL) {
+ return NT_STATUS_NOT_FOUND;
+ }
+ db_value = dbwrap_record_get_value(rec);
+ if (db_value.dsize == 0) {
+ status = NT_STATUS_INTERNAL_ERROR;
+ goto out;
+ }
+
+ value = talloc(talloc_tos(), struct leases_db_value);
+ if (value == NULL) {
+ status = NT_STATUS_NO_MEMORY;
+ goto out;
+ }
+
+ blob.data = db_value.dptr;
+ blob.length = db_value.dsize;
+
+ ndr_err = ndr_pull_struct_blob_all(
+ &blob, value, value,
+ (ndr_pull_flags_fn_t)ndr_pull_leases_db_value);
+ if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
+ DEBUG(10, ("%s: ndr_pull_struct_blob_failed: %s\n",
+ __func__, ndr_errstr(ndr_err)));
+ status = ndr_map_error2ntstatus(ndr_err);
+ goto out;
+ }
+
+ /* id must exist. */
+ for (i = 0; i < value->num_file_ids; i++) {
+ if (file_id_equal(id, &value->ids[i])) {
+ break;
+ }
+ }
+
+ if (i == value->num_file_ids) {
+ status = NT_STATUS_NOT_FOUND;
+ goto out;
+ }
+
+ value->ids[i] = value->ids[value->num_file_ids-1];
+ value->num_file_ids -= 1;
+
+ if (value->num_file_ids == 0) {
+ DEBUG(10, ("%s: deleting record\n", __func__));
+ status = dbwrap_record_delete(rec);
+ } else {
+ DEBUG(10, ("%s: updating record\n", __func__));
+ ndr_err = ndr_push_struct_blob(
+ &blob, talloc_tos(), value,
+ (ndr_push_flags_fn_t)ndr_push_leases_db_value);
+ if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
+ DEBUG(10, ("%s: ndr_push_struct_blob_failed: %s\n",
+ __func__, ndr_errstr(ndr_err)));
+ status = ndr_map_error2ntstatus(ndr_err);
+ goto out;
+ }
+
+ if (DEBUGLEVEL >= 10) {
+ DEBUG(10, ("%s:\n", __func__));
+ NDR_PRINT_DEBUG(leases_db_value, value);
+ }
+
+ db_value = make_tdb_data(blob.data, blob.length);
+
+ status = dbwrap_record_store(rec, db_value, 0);
+ if (!NT_STATUS_IS_OK(status)) {
+ DEBUG(10, ("%s: dbwrap_record_store returned %s\n",
+ __func__, nt_errstr(status)));
+ }
+ }
+
+ out:
+
+ TALLOC_FREE(value);
+ TALLOC_FREE(rec);
+ return status;
+}
+
+struct leases_db_fetch_state {
+ void (*parser)(uint32_t num_file_ids,
+ struct file_id *ids, const char *filename,
+ const char *stream_name, void *private_data);
+ void *private_data;
+ NTSTATUS status;
+};
+
+static void leases_db_parser(TDB_DATA key, TDB_DATA data, void *private_data)
+{
+ struct leases_db_fetch_state *state =
+ (struct leases_db_fetch_state *)private_data;
+ DATA_BLOB blob = { .data = data.dptr, .length = data.dsize };
+ enum ndr_err_code ndr_err;
+ struct leases_db_value *value;
+
+ value = talloc(talloc_tos(), struct leases_db_value);
+ if (value == NULL) {
+ state->status = NT_STATUS_NO_MEMORY;
+ return;
+ }
+
+ ndr_err = ndr_pull_struct_blob_all(
+ &blob, value, value,
+ (ndr_pull_flags_fn_t)ndr_pull_leases_db_value);
+ if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
+ DEBUG(10, ("%s: ndr_pull_struct_blob_failed: %s\n",
+ __func__, ndr_errstr(ndr_err)));
+ TALLOC_FREE(value);
+ state->status = ndr_map_error2ntstatus(ndr_err);
+ return;
+ }
+
+ if (DEBUGLEVEL >= 10) {
+ DEBUG(10, ("%s:\n", __func__));
+ NDR_PRINT_DEBUG(leases_db_value, value);
+ }
+
+ state->parser(value->num_file_ids,
+ value->ids, value->filename, value->stream_name,
+ state->private_data);
+
+ TALLOC_FREE(value);
+ state->status = NT_STATUS_OK;
+}
+
+NTSTATUS leases_db_parse(const struct GUID *client_guid,
+ const struct smb2_lease_key *lease_key,
+ void (*parser)(uint32_t num_file_ids,
+ struct file_id *ids,
+ const char *filename,
+ const char *stream_name,
+ void *private_data),
+ void *private_data)
+{
+ TDB_DATA db_key;
+ struct leases_db_fetch_state state;
+ NTSTATUS status;
+ bool ok;
+
+ if (!leases_db_init(true)) {
+ return NT_STATUS_INTERNAL_ERROR;
+ }
+
+ ok = leases_db_key(talloc_tos(), client_guid, lease_key, &db_key);
+ if (!ok) {
+ return NT_STATUS_NO_MEMORY;
+ }
+
+ state = (struct leases_db_fetch_state) {
+ .parser = parser,
+ .private_data = private_data,
+ .status = NT_STATUS_OK
+ };
+
+ status = dbwrap_parse_record(leases_db, db_key, leases_db_parser,
+ &state);
+ TALLOC_FREE(db_key.dptr);
+ if (!NT_STATUS_IS_OK(status)) {
+ return status;
+ }
+ return state.status;
+}
git.samba.org / metze / samba / wip.git / commitdiff