ltt-sessiond/ust-ctl.c

   1 /*
   2  * Copyright (C) 2011 - David Goulet <david.goulet@polymtl.ca>
   3  *
   4  * This program is free software; you can redistribute it and/or
   5  * modify it under the terms of the GNU General Public License
   6  * as published by the Free Software Foundation; only version 2
   7  * of the License.
   8  *
   9  * This program is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  * GNU General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU General Public License
  15  * along with this program; if not, write to the Free Software
  16  * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
  17  */
  18
  19 #define _GNU_SOURCE
  20 #include <stdlib.h>
  21 #include <stdio.h>
  22 #include <string.h>
  23 #include <unistd.h>
  24
  25 #include <lttng-sessiond-comm.h>
  26 #include <lttngerr.h>
  27
  28 #include "ust-comm.h"
  29 #include "ust-ctl.h"
  30
  31 /*
  32  * Send registration done packet to the application.
  33  */
  34 int ustctl_register_done(int sock)
  35 {
  36         struct lttcomm_ust_msg command;
  37         struct lttcomm_ust_reply *reply;
  38
  39         DBG("Sending register done command to %d", sock);
  40
  41         command.cmd = LTTNG_UST_REGISTER_DONE;
  42         command.handle = LTTNG_UST_ROOT_HANDLE;
  43
  44         reply = ustcomm_send_command(sock, &command);
  45         if (reply == NULL) {
  46                 goto error;
  47         }
  48
  49         if (reply->ret_code != LTTCOMM_OK) {
  50                 DBG("Return code: %s", lttcomm_get_readable_code(reply->ret_code));
  51                 goto error;
  52         }
  53
  54         return 0;
  55
  56 error:
  57         return -1;
  58 }
  59
  60 /*
  61  * Create an UST session on the tracer.
  62  */
  63 int ustctl_create_session(struct ltt_ust_session *session)
  64 {
  65         struct lttcomm_ust_msg command;
  66         struct lttcomm_ust_reply *reply;
  67
  68         DBG("Creating UST session for app pid:%d", session->app->pid);
  69
  70         command.cmd = LTTNG_UST_SESSION;
  71         command.handle = LTTNG_UST_ROOT_HANDLE;
  72
  73         reply = ustcomm_send_command(session->app->sock, &command);
  74         if (reply == NULL) {
  75                 goto error;
  76         }
  77
  78         if (reply->ret_code != LTTCOMM_OK) {
  79                 DBG("Return code: %s", lttcomm_get_readable_code(reply->ret_code));
  80                 goto error;
  81         }
  82
  83         /* Save session handle */
  84         session->handle = reply->handle;
  85
  86         return 0;
  87
  88 error:
  89         return -1;
  90 }