/* Unix SMB/CIFS implementation. Samba internal messaging functions Copyright (C) 2007 by Volker Lendecke 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" #ifdef CLUSTER_SUPPORT #include "librpc/gen_ndr/messaging.h" #include "ctdb.h" #include "ctdb_private.h" #include "ctdbd_conn.h" struct messaging_ctdbd_context { struct ctdbd_connection *conn; }; /* * This is a Samba3 hack/optimization. Routines like process_exists need to * talk to ctdbd, and they don't get handed a messaging context. */ static struct ctdbd_connection *global_ctdbd_connection; static int global_ctdb_connection_pid; struct ctdbd_connection *messaging_ctdbd_connection(void) { if (global_ctdb_connection_pid == 0 && global_ctdbd_connection == NULL) { struct event_context *ev; struct messaging_context *msg; ev = event_context_init(NULL); if (!ev) { DEBUG(0,("event_context_init failed\n")); } msg = messaging_init(NULL, procid_self(), ev); if (!msg) { DEBUG(0,("messaging_init failed\n")); return NULL; } } if (global_ctdb_connection_pid != getpid()) { DEBUG(0,("messaging_ctdbd_connection():" "valid for pid[%d] but it's [%d]\n", global_ctdb_connection_pid, getpid())); smb_panic("messaging_ctdbd_connection() invalid process\n"); } return global_ctdbd_connection; } static NTSTATUS messaging_ctdb_send(struct messaging_context *msg_ctx, struct server_id pid, int msg_type, const DATA_BLOB *data, struct messaging_backend *backend) { struct messaging_ctdbd_context *ctx = talloc_get_type_abort( backend->private_data, struct messaging_ctdbd_context); struct messaging_rec msg; msg.msg_version = MESSAGE_VERSION; msg.msg_type = msg_type; msg.dest = pid; msg.src = procid_self(); msg.buf = *data; return ctdbd_messaging_send(ctx->conn, pid.vnn, pid.pid, &msg); } static int messaging_ctdbd_destructor(struct messaging_ctdbd_context *ctx) { /* * The global connection just went away */ global_ctdb_connection_pid = 0; global_ctdbd_connection = NULL; return 0; } NTSTATUS messaging_ctdbd_init(struct messaging_context *msg_ctx, TALLOC_CTX *mem_ctx, struct messaging_backend **presult) { struct messaging_backend *result; struct messaging_ctdbd_context *ctx; NTSTATUS status; if (!(result = TALLOC_P(mem_ctx, struct messaging_backend))) { DEBUG(0, ("talloc failed\n")); return NT_STATUS_NO_MEMORY; } if (!(ctx = TALLOC_P(result, struct messaging_ctdbd_context))) { DEBUG(0, ("talloc failed\n")); TALLOC_FREE(result); return NT_STATUS_NO_MEMORY; } status = ctdbd_messaging_connection(ctx, &ctx->conn); if (!NT_STATUS_IS_OK(status)) { DEBUG(10, ("ctdbd_messaging_connection failed: %s\n", nt_errstr(status))); TALLOC_FREE(result); return status; } status = ctdbd_register_msg_ctx(ctx->conn, msg_ctx); if (!NT_STATUS_IS_OK(status)) { DEBUG(10, ("ctdbd_register_msg_ctx failed: %s\n", nt_errstr(status))); TALLOC_FREE(result); return status; } global_ctdb_connection_pid = getpid(); global_ctdbd_connection = ctx->conn; talloc_set_destructor(ctx, messaging_ctdbd_destructor); set_my_vnn(ctdbd_vnn(ctx->conn)); result->send_fn = messaging_ctdb_send; result->private_data = (void *)ctx; *presult = result; return NT_STATUS_OK; } #else NTSTATUS messaging_ctdbd_init(struct messaging_context *msg_ctx, TALLOC_CTX *mem_ctx, struct messaging_backend **presult) { return NT_STATUS_NOT_IMPLEMENTED; } #endif