ceph/src/spdk/app/vhost/vhost.c

   1 /*-
   2  *   BSD LICENSE
   3  *
   4  *   Copyright (c) Intel Corporation.
   5  *   All rights reserved.
   6  *
   7  *   Redistribution and use in source and binary forms, with or without
   8  *   modification, are permitted provided that the following conditions
   9  *   are met:
  10  *
  11  *     * Redistributions of source code must retain the above copyright
  12  *       notice, this list of conditions and the following disclaimer.
  13  *     * Redistributions in binary form must reproduce the above copyright
  14  *       notice, this list of conditions and the following disclaimer in
  15  *       the documentation and/or other materials provided with the
  16  *       distribution.
  17  *     * Neither the name of Intel Corporation nor the names of its
  18  *       contributors may be used to endorse or promote products derived
  19  *       from this software without specific prior written permission.
  20  *
  21  *   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  22  *   "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  23  *   LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  24  *   A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  25  *   OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  26  *   SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  27  *   LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  28  *   DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  29  *   THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  30  *   (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  31  *   OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  32  */
  33
  34 #include "spdk/stdinc.h"
  35
  36 #include "spdk/conf.h"
  37 #include "spdk/event.h"
  38
  39 #include "spdk/vhost.h"
  40
  41 static const char *g_pid_path = NULL;
  42
  43 static void
  44 vhost_usage(void)
  45 {
  46         printf(" -f <path>                 save pid to file under given path\n");
  47         printf(" -S <path>                 directory where to create vhost sockets (default: pwd)\n");
  48 }
  49
  50 static void
  51 save_pid(const char *pid_path)
  52 {
  53         FILE *pid_file;
  54
  55         pid_file = fopen(pid_path, "w");
  56         if (pid_file == NULL) {
  57                 fprintf(stderr, "Couldn't create pid file '%s': %s\n", pid_path, strerror(errno));
  58                 exit(EXIT_FAILURE);
  59         }
  60
  61         fprintf(pid_file, "%d\n", getpid());
  62         fclose(pid_file);
  63 }
  64
  65 static int
  66 vhost_parse_arg(int ch, char *arg)
  67 {
  68         switch (ch) {
  69         case 'f':
  70                 g_pid_path = arg;
  71                 break;
  72         case 'S':
  73                 spdk_vhost_set_socket_path(arg);
  74                 break;
  75         default:
  76                 return -EINVAL;
  77         }
  78         return 0;
  79 }
  80
  81 static void
  82 vhost_started(void *arg1)
  83 {
  84 }
  85
  86 int
  87 main(int argc, char *argv[])
  88 {
  89         struct spdk_app_opts opts = {};
  90         int rc;
  91
  92         spdk_app_opts_init(&opts);
  93         opts.name = "vhost";
  94
  95         if ((rc = spdk_app_parse_args(argc, argv, &opts, "f:S:", NULL,
  96                                       vhost_parse_arg, vhost_usage)) !=
  97             SPDK_APP_PARSE_ARGS_SUCCESS) {
  98                 exit(rc);
  99         }
 100
 101         if (g_pid_path) {
 102                 save_pid(g_pid_path);
 103         }
 104
 105         /* Blocks until the application is exiting */
 106         rc = spdk_app_start(&opts, vhost_started, NULL);
 107
 108         spdk_app_fini();
 109
 110         return rc;
 111 }