source4/smbd/service_task.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3
   4    helper functions for task based servers (nbtd, winbind etc)
   5
   6    Copyright (C) Andrew Tridgell 2005
   7
   8    This program is free software; you can redistribute it and/or modify
   9    it under the terms of the GNU General Public License as published by
  10    the Free Software Foundation; either version 2 of the License, or
  11    (at your option) any later version.
  12
  13    This program is distributed in the hope that it will be useful,
  14    but WITHOUT ANY WARRANTY; without even the implied warranty of
  15    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16    GNU General Public License for more details.
  17
  18    You should have received a copy of the GNU General Public License
  19    along with this program; if not, write to the Free Software
  20    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  21 */
  22
  23 #include "includes.h"
  24 #include "process_model.h"
  25 #include "lib/events/events.h"
  26 #include "smbd/service.h"
  27 #include "smbd/service_task.h"
  28 #include "lib/messaging/irpc.h"
  29
  30 /*
  31   terminate a task service
  32 */
  33 void task_server_terminate(struct task_server *task, const char *reason)
  34 {
  35         struct event_context *event_ctx = task->event_ctx;
  36         const struct model_ops *model_ops = task->model_ops;
  37         DEBUG(0,("task_server_terminate: [%s]\n", reason));
  38         talloc_free(task);
  39         model_ops->terminate(event_ctx, reason);
  40 }
  41
  42 /* used for the callback from the process model code */
  43 struct task_state {
  44         void (*task_init)(struct task_server *);
  45         const struct model_ops *model_ops;
  46 };
  47
  48
  49 /*
  50   called by the process model code when the new task starts up. This then calls
  51   the server specific startup code
  52 */
  53 static void task_server_callback(struct event_context *event_ctx,
  54                                  struct server_id server_id, void *private)
  55 {
  56         struct task_state *state = talloc_get_type(private, struct task_state);
  57         struct task_server *task;
  58
  59         task = talloc(event_ctx, struct task_server);
  60         if (task == NULL) return;
  61
  62         task->event_ctx = event_ctx;
  63         task->model_ops = state->model_ops;
  64         task->server_id = server_id;
  65
  66         task->msg_ctx = messaging_init(task, task->server_id, task->event_ctx);
  67         if (!task->msg_ctx) {
  68                 task_server_terminate(task, "messaging_init() failed");
  69                 return;
  70         }
  71
  72         state->task_init(task);
  73 }
  74
  75 /*
  76   startup a task based server
  77 */
  78 NTSTATUS task_server_startup(struct event_context *event_ctx,
  79                              const struct model_ops *model_ops,
  80                              void (*task_init)(struct task_server *))
  81 {
  82         struct task_state *state;
  83
  84         state = talloc(event_ctx, struct task_state);
  85         NT_STATUS_HAVE_NO_MEMORY(state);
  86
  87         state->task_init = task_init;
  88         state->model_ops = model_ops;
  89
  90         model_ops->new_task(event_ctx, task_server_callback, state);
  91
  92         return NT_STATUS_OK;
  93 }
  94
  95 /*
  96   setup a task title
  97 */
  98 void task_server_set_title(struct task_server *task, const char *title)
  99 {
 100         task->model_ops->set_title(task->event_ctx, title);
 101 }