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 "lib/messaging/irpc.h"
  25 #include "param/param.h"
  26 #include "librpc/gen_ndr/ndr_irpc_c.h"
  27
  28 /*
  29   terminate a task service
  30 */
  31 void task_server_terminate(struct task_server *task, const char *reason, bool fatal)
  32 {
  33         struct tevent_context *event_ctx = task->event_ctx;
  34         const struct model_ops *model_ops = task->model_ops;
  35         DEBUG(0,("task_server_terminate: [%s]\n", reason));
  36
  37         if (fatal && task->msg_ctx != NULL) {
  38                 struct dcerpc_binding_handle *irpc_handle;
  39                 struct samba_terminate r;
  40
  41                 irpc_handle = irpc_binding_handle_by_name(task, task->msg_ctx,
  42                                                           "samba", &ndr_table_irpc);
  43                 if (irpc_handle != NULL) {
  44                         r.in.reason = reason;
  45                         dcerpc_samba_terminate_r(irpc_handle, task, &r);
  46                 }
  47         }
  48
  49         imessaging_cleanup(task->msg_ctx);
  50
  51         model_ops->terminate(event_ctx, task->lp_ctx, reason);
  52
  53         /* don't free this above, it might contain the 'reason' being printed */
  54         talloc_free(task);
  55 }
  56
  57 /* used for the callback from the process model code */
  58 struct task_state {
  59         void (*task_init)(struct task_server *);
  60         const struct model_ops *model_ops;
  61 };
  62
  63
  64 /*
  65   called by the process model code when the new task starts up. This then calls
  66   the server specific startup code
  67 */
  68 static void task_server_callback(struct tevent_context *event_ctx,
  69                                  struct loadparm_context *lp_ctx,
  70                                  struct server_id server_id, void *private_data)
  71 {
  72         struct task_state *state = talloc_get_type(private_data, struct task_state);
  73         struct task_server *task;
  74
  75         task = talloc(event_ctx, struct task_server);
  76         if (task == NULL) return;
  77
  78         task->event_ctx = event_ctx;
  79         task->model_ops = state->model_ops;
  80         task->server_id = server_id;
  81         task->lp_ctx = lp_ctx;
  82
  83         task->msg_ctx = imessaging_init(task,
  84                                         task->lp_ctx,
  85                                         task->server_id,
  86                                         task->event_ctx, false);
  87         if (!task->msg_ctx) {
  88                 task_server_terminate(task, "imessaging_init() failed", true);
  89                 return;
  90         }
  91
  92         state->task_init(task);
  93 }
  94
  95 /*
  96   startup a task based server
  97 */
  98 NTSTATUS task_server_startup(struct tevent_context *event_ctx,
  99                              struct loadparm_context *lp_ctx,
 100                              const char *service_name,
 101                              const struct model_ops *model_ops,
 102                              void (*task_init)(struct task_server *))
 103 {
 104         struct task_state *state;
 105
 106         state = talloc(event_ctx, struct task_state);
 107         NT_STATUS_HAVE_NO_MEMORY(state);
 108
 109         state->task_init = task_init;
 110         state->model_ops = model_ops;
 111
 112         model_ops->new_task(event_ctx, lp_ctx, service_name, task_server_callback, state);
 113
 114         return NT_STATUS_OK;
 115 }
 116
 117 /*
 118   setup a task title
 119 */
 120 void task_server_set_title(struct task_server *task, const char *title)
 121 {
 122         task->model_ops->set_title(task->event_ctx, title);
 123 }