usr.bin/dfregress/kernel.c

   1  /*
   2  * Copyright (c) 2011 Alex Hornung <alex@alexhornung.com>.
   3  * All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  *
   9  * 1. Redistributions of source code must retain the above copyright
  10  *    notice, this list of conditions and the following disclaimer.
  11  * 2. Redistributions in binary form must reproduce the above copyright
  12  *    notice, this list of conditions and the following disclaimer in
  13  *    the documentation and/or other materials provided with the
  14  *    distribution.
  15  *
  16  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  17  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  18  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
  19  * FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE
  20  * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
  21  * INCIDENTAL, SPECIAL, EXEMPLARY OR CONSEQUENTIAL DAMAGES (INCLUDING,
  22  * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  23  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
  24  * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
  25  * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
  26  * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  27  * SUCH DAMAGE.
  28  */
  29
  30 #include <sys/resource.h>
  31 #include <sys/time.h>
  32 #include <sys/types.h>
  33 #include <sys/param.h>
  34 #include <sys/stat.h>
  35 #include <sys/linker.h>
  36 #include <sys/ioctl.h>
  37 #include <sys/wait.h>
  38
  39 #include <errno.h>
  40 #include <fcntl.h>
  41 #include <signal.h>
  42 #include <stdio.h>
  43 #include <stdlib.h>
  44 #include <stdint.h>
  45 #include <string.h>
  46 #include <unistd.h>
  47 #include <pwd.h>
  48
  49 #include <err.h>
  50
  51 #include <libprop/proplib.h>
  52
  53 #include "parser.h"
  54 #include "testcase.h"
  55 #include "runlist.h"
  56 #include "config.h"
  57 #include "kernel.h"
  58 #include <dfregress.h>
  59 #include <sys/tbridge.h>
  60
  61
  62 int
  63 run_kernel(const char *kmod, prop_dictionary_t testcase)
  64 {
  65         char errmsg[1024];
  66         prop_dictionary_t tkcase = NULL;
  67         struct stat sb;
  68         int fd, r, kmod_id, ret = 0;
  69
  70         if ((r = stat("/dev/tbridge", &sb)) != 0) {
  71                 sprintf(errmsg, "Kernel bridge module probably not loaded: %s",
  72                     strerror(errno));
  73                 testcase_set_sys_buf(testcase, errmsg);
  74                 testcase_set_result(testcase, RESULT_PREFAIL);
  75
  76                 return -1;
  77         }
  78
  79         /* First kldload the testcase */
  80         kmod_id = kldload(kmod);
  81         if (kmod_id < 0) {
  82                 sprintf(errmsg, "Could not load testcase kmod %s: %s", kmod,
  83                     strerror(errno));
  84                 testcase_set_sys_buf(testcase, errmsg);
  85                 testcase_set_result(testcase, RESULT_PREFAIL);
  86
  87                 return -1;
  88         }
  89
  90         /* Open control device */
  91         fd = open("/dev/tbridge", O_RDWR);
  92         if (fd < 0) {
  93                 sprintf(errmsg, "Could not open kernel bridge interface: %s",
  94                     strerror(errno));
  95                 testcase_set_sys_buf(testcase, errmsg);
  96                 testcase_set_result(testcase, RESULT_PREFAIL);
  97
  98                 ret = -1;
  99                 goto unload;
 100         }
 101
 102         /* Then load the testcase description into the kernel */
 103         r = prop_dictionary_send_ioctl(testcase, fd, TBRIDGE_LOADTEST);
 104         if (r < 0) {
 105                 sprintf(errmsg, "sending testcase to kernel failed: %s",
 106                     strerror(errno));
 107                 testcase_set_sys_buf(testcase, errmsg);
 108                 testcase_set_result(testcase, RESULT_PREFAIL);
 109
 110                 ret = -1;
 111                 goto unload;
 112         }
 113
 114         /* Then wait for the result */
 115         r = prop_dictionary_recv_ioctl(fd, TBRIDGE_GETRESULT, &tkcase);
 116         if (r < 0) {
 117                 sprintf(errmsg, "receiving test results from kernel failed: %s",
 118                     strerror(errno));
 119                 testcase_set_sys_buf(testcase, errmsg);
 120                 testcase_set_result(testcase, RESULT_PREFAIL);
 121
 122                 ret = -1;
 123                 goto unload;
 124         }
 125
 126         /* Copy over the values of interest */
 127         testcase_set_result(testcase, testcase_get_result(tkcase));
 128         testcase_set_stdout_buf(testcase, testcase_get_stdout_buf(tkcase));
 129
 130         /* Release copy received from kernel */
 131         prop_object_release(tkcase);
 132
 133 unload:
 134         r = kldunload(kmod_id);
 135         if (r < 0) {
 136                 sprintf(errmsg, "kldunload for %s failed: %s", kmod,
 137                     strerror(errno));
 138                 testcase_set_sys_buf(testcase, errmsg);
 139
 140                 ret = -1;
 141         }
 142
 143         return ret;
 144 }