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 3 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, see <http://www.gnu.org/licenses/>.
  20 */
  21
  22 #include "includes.h"
  23 #include "process_model.h"
  24 #include "smbd/service.h"
  25 #include "smbd/service_task.h"
  26 #include "lib/messaging/irpc.h"
  27 #include "param/param.h"
  28
  29 /*
  30   terminate a task service
  31 */
  32 void task_server_terminate(struct task_server *task, const char *reason)
  33 {
  34         struct tevent_context *event_ctx = task->event_ctx;
  35         const struct model_ops *model_ops = task->model_ops;
  36         DEBUG(0,("task_server_terminate: [%s]\n", reason));
  37         model_ops->terminate(event_ctx, task->lp_ctx, reason);
  38
  39         /* don't free this above, it might contain the 'reason' being printed */
  40         talloc_free(task);
  41 }
  42
  43 /* used for the callback from the process model code */
  44 struct task_state {
  45         void (*task_init)(struct task_server *);
  46         const struct model_ops *model_ops;
  47 };
  48
  49
  50 /*
  51   called by the process model code when the new task starts up. This then calls
  52   the server specific startup code
  53 */
  54 static void task_server_callback(struct tevent_context *event_ctx,
  55                                  struct loadparm_context *lp_ctx,
  56                                  struct server_id server_id, void *private_data)
  57 {
  58         struct task_state *state = talloc_get_type(private_data, struct task_state);
  59         struct task_server *task;
  60
  61         task = talloc(event_ctx, struct task_server);
  62         if (task == NULL) return;
  63
  64         task->event_ctx = event_ctx;
  65         task->model_ops = state->model_ops;
  66         task->server_id = server_id;
  67         task->lp_ctx = lp_ctx;
  68
  69         task->msg_ctx = messaging_init(task,
  70                                        lp_messaging_path(task, task->lp_ctx),
  71                                        task->server_id,
  72                                        lp_iconv_convenience(task->lp_ctx),
  73                                        task->event_ctx);
  74         if (!task->msg_ctx) {
  75                 task_server_terminate(task, "messaging_init() failed");
  76                 return;
  77         }
  78
  79         state->task_init(task);
  80 }
  81
  82 /*
  83   startup a task based server
  84 */
  85 NTSTATUS task_server_startup(struct tevent_context *event_ctx,
  86                              struct loadparm_context *lp_ctx,
  87                              const char *service_name,
  88                              const struct model_ops *model_ops,
  89                              void (*task_init)(struct task_server *))
  90 {
  91         struct task_state *state;
  92
  93         state = talloc(event_ctx, struct task_state);
  94         NT_STATUS_HAVE_NO_MEMORY(state);
  95
  96         state->task_init = task_init;
  97         state->model_ops = model_ops;
  98
  99         model_ops->new_task(event_ctx, lp_ctx, service_name, task_server_callback, state);
 100
 101         return NT_STATUS_OK;
 102 }
 103
 104 /*
 105   setup a task title
 106 */
 107 void task_server_set_title(struct task_server *task, const char *title)
 108 {
 109         task->model_ops->set_title(task->event_ctx, title);
 110 }