r5104: - added support for task based servers. These are servers that within

  themselves are run as a single process, but run as a child of the
  main process when smbd is run in the standard model, and run as part
  of the main process when in the single mode.

- rewrote the winbind template code to use the new task services. Also
  fixed the packet queueing

- got rid of event_context_merge() as it is no longer needed
(This used to be commit 339964a596689278d2138cff05d7d444798a3504)

1 files changed, 90 insertions, 0 deletions

diff --git a/source4/smbd/service_task.c b/source4/smbd/service_task.c
new file mode 100644
index 00000000000..ea09edf3f41
--- /dev/null
+++ b/source4/smbd/service_task.c
@@ -0,0 +1,90 @@
+/* 
+   Unix SMB/CIFS implementation.
+
+   helper functions for task based servers (nbtd, winbind etc)
+
+   Copyright (C) Andrew Tridgell 2005
+   
+   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 2 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, write to the Free Software
+   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+*/
+
+#include "includes.h"
+#include "process_model.h"
+#include "events.h"
+#include "smbd/service_task.h"
+
+/*
+  terminate a task service
+*/
+void task_terminate(struct task_server *task, const char *reason)
+{
+	struct event_ctx *event_ctx = task->event_ctx;
+	const struct model_ops *model_ops = task->model_ops;
+	talloc_free(task);
+	model_ops->terminate(event_ctx, reason);
+}
+
+/* used for the callback from the process model code */
+struct task_state {
+	void (*task_init)(struct task_server *);
+	const struct model_ops *model_ops;
+};
+
+
+/*
+  called by the process model code when the new task starts up. This then calls
+  the server specific startup code
+*/
+static void task_server_callback(struct event_context *event_ctx, uint32_t server_id, void *private)
+{
+	struct task_state *state = talloc_get_type(private, struct task_state);
+	struct task_server *task;
+
+	task = talloc(event_ctx, struct task_server);
+	if (task == NULL) return;
+
+	task->event_ctx = event_ctx;
+	task->model_ops = state->model_ops;
+	task->server_id = server_id;
+
+	task->msg_ctx = messaging_init(task, task->server_id, task->event_ctx);
+	if (!task->msg_ctx) {
+		task_terminate(task, "messaging_init() failed");
+		return;
+	}
+
+	state->task_init(task);
+}
+
+/*
+  startup a task based server
+*/
+NTSTATUS task_server_startup(struct event_context *event_ctx, 
+			     const struct model_ops *model_ops, 
+			     void (*task_init)(struct task_server *))
+{
+	struct task_state *state;
+
+	state = talloc(event_ctx, struct task_state);
+	NT_STATUS_HAVE_NO_MEMORY(state);
+
+	state->task_init = task_init;
+	state->model_ops = model_ops;
+	
+	model_ops->new_task(event_ctx, task_server_callback, state);
+
+	return NT_STATUS_OK;
+}
+