src/bin/lttng-relayd/cmd-2-2.c

   1 /*
   2  * Copyright (C) 2013 - Julien Desfossez <jdesfossez@efficios.com>
   3  *                      David Goulet <dgoulet@efficios.com>
   4  *               2015 - Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
   5  *
   6  * This program is free software; you can redistribute it and/or modify it
   7  * under the terms of the GNU General Public License, version 2 only, as
   8  * published by the Free Software Foundation.
   9  *
  10  * This program is distributed in the hope that it will be useful, but WITHOUT
  11  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  12  * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
  13  * more details.
  14  *
  15  * You should have received a copy of the GNU General Public License along with
  16  * this program; if not, write to the Free Software Foundation, Inc., 51
  17  * Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  18  */
  19
  20 #define _GNU_SOURCE
  21 #define _LGPL_SOURCE
  22 #include <assert.h>
  23 #include <string.h>
  24
  25 #include <common/common.h>
  26 #include <common/sessiond-comm/relayd.h>
  27
  28 #include <common/compat/endian.h>
  29
  30 #include "cmd-generic.h"
  31 #include "cmd-2-1.h"
  32 #include "utils.h"
  33
  34 /*
  35  * cmd_recv_stream_2_2 allocates path_name and channel_name.
  36  */
  37 int cmd_recv_stream_2_2(struct relay_connection *conn,
  38                 char **ret_path_name, char **ret_channel_name,
  39                 uint64_t *tracefile_size, uint64_t *tracefile_count)
  40 {
  41         int ret;
  42         struct lttcomm_relayd_add_stream_2_2 stream_info;
  43         char *path_name = NULL;
  44         char *channel_name = NULL;
  45
  46         ret = cmd_recv(conn->sock, &stream_info, sizeof(stream_info));
  47         if (ret < 0) {
  48                 ERR("Unable to recv stream version 2.2");
  49                 goto error;
  50         }
  51
  52         path_name = create_output_path(stream_info.pathname);
  53         if (!path_name) {
  54                 PERROR("Path name allocation");
  55                 ret = -ENOMEM;
  56                 goto error;
  57         }
  58
  59         channel_name = strdup(stream_info.channel_name);
  60         if (!channel_name) {
  61                 ret = -errno;
  62                 PERROR("Path name allocation");
  63                 goto error;
  64         }
  65
  66         *tracefile_size = be64toh(stream_info.tracefile_size);
  67         *tracefile_count = be64toh(stream_info.tracefile_count);
  68         *ret_path_name = path_name;
  69         *ret_channel_name = channel_name;
  70         return 0;
  71 error:
  72         free(path_name);
  73         free(channel_name);
  74         return ret;
  75 }