tests/test-readahead.c

   1 /* nbdkit
   2  * Copyright (C) 2017-2019 Red Hat Inc.
   3  *
   4  * Redistribution and use in source and binary forms, with or without
   5  * modification, are permitted provided that the following conditions are
   6  * met:
   7  *
   8  * * Redistributions of source code must retain the above copyright
   9  * notice, this list of conditions and the following disclaimer.
  10  *
  11  * * Redistributions in binary form must reproduce the above copyright
  12  * notice, this list of conditions and the following disclaimer in the
  13  * documentation and/or other materials provided with the distribution.
  14  *
  15  * * Neither the name of Red Hat nor the names of its contributors may be
  16  * used to endorse or promote products derived from this software without
  17  * specific prior written permission.
  18  *
  19  * THIS SOFTWARE IS PROVIDED BY RED HAT AND CONTRIBUTORS ''AS IS'' AND
  20  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
  21  * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
  22  * PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL RED HAT OR
  23  * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  24  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  25  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
  26  * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
  27  * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
  28  * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
  29  * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  30  * SUCH DAMAGE.
  31  */
  32
  33 #include <config.h>
  34
  35 #include <stdio.h>
  36 #include <stdlib.h>
  37 #include <stdint.h>
  38 #include <inttypes.h>
  39 #include <string.h>
  40 #include <unistd.h>
  41
  42 #include <guestfs.h>
  43
  44 #include "test.h"
  45
  46 int
  47 main (int argc, char *argv[])
  48 {
  49   guestfs_h *g;
  50   int r;
  51   char *data;
  52   char **files;
  53   size_t i;
  54
  55   /* The idea behind the test is that the readahead filter should not
  56    * interfere with normal, complex, non-sequential read and write
  57    * operations (although it will slow things down a lot).
  58    */
  59   if (test_start_nbdkit ("--filter", "readahead",
  60                          "memory", "1G", NULL) == -1)
  61     exit (EXIT_FAILURE);
  62
  63   g = guestfs_create ();
  64   if (g == NULL) {
  65     perror ("guestfs_create");
  66     exit (EXIT_FAILURE);
  67   }
  68
  69   r = guestfs_add_drive_opts (g, "",
  70                               GUESTFS_ADD_DRIVE_OPTS_FORMAT, "raw",
  71                               GUESTFS_ADD_DRIVE_OPTS_PROTOCOL, "nbd",
  72                               GUESTFS_ADD_DRIVE_OPTS_SERVER, server,
  73                               -1);
  74   if (r == -1)
  75     exit (EXIT_FAILURE);
  76
  77   if (guestfs_launch (g) == -1)
  78     exit (EXIT_FAILURE);
  79
  80   if (guestfs_part_disk (g, "/dev/sda", "mbr") == -1)
  81     exit (EXIT_FAILURE);
  82   if (guestfs_mkfs (g, "ext2", "/dev/sda1") == -1)
  83     exit (EXIT_FAILURE);
  84
  85   if (guestfs_mount_options (g, "discard", "/dev/sda1", "/") == -1)
  86     exit (EXIT_FAILURE);
  87
  88 #define filename "/hello.txt"
  89 #define content "hello, people of the world"
  90
  91   if (guestfs_write (g, filename, content, strlen (content)) == -1)
  92     exit (EXIT_FAILURE);
  93
  94   if (guestfs_mkdir (g, "/fill") == -1)
  95     exit (EXIT_FAILURE);
  96
  97   if (guestfs_fill_dir (g, "/fill", 10000) == -1)
  98     exit (EXIT_FAILURE);
  99
 100   /* Force write through to and read back from disk. */
 101   if (guestfs_sync (g) == -1 || guestfs_drop_caches (g, 3) == -1)
 102     exit (EXIT_FAILURE);
 103
 104   data = guestfs_cat (g, filename);
 105   if (!data)
 106     exit (EXIT_FAILURE);
 107
 108   if (strcmp (data, content) != 0) {
 109     fprintf (stderr,
 110              "%s FAILED: unexpected content of %s file "
 111              "(actual: %s, expected: %s)\n",
 112              program_name, filename, data, content);
 113     exit (EXIT_FAILURE);
 114   }
 115
 116   files = guestfs_find (g, "/");
 117   if (!files)
 118     exit (EXIT_FAILURE);
 119   for (i = 0; files[i] != NULL; ++i)
 120     free (files[i]);
 121   free (files);
 122
 123 #ifdef GUESTFS_HAVE_FSTRIM
 124   /* Delete the files and fstrim to test zeroing/trimming. */
 125   if (guestfs_rm (g, filename) == -1)
 126     exit (EXIT_FAILURE);
 127
 128   if (guestfs_rm_rf (g, "/fill") == -1)
 129     exit (EXIT_FAILURE);
 130
 131   if (guestfs_fstrim (g, "/", -1) == -1)
 132     exit (EXIT_FAILURE);
 133 #endif
 134
 135   if (guestfs_shutdown (g) == -1)
 136     exit (EXIT_FAILURE);
 137
 138   guestfs_close (g);
 139   exit (EXIT_SUCCESS);
 140 }