2 * Copyright (C) 2018 Red Hat Inc.
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9 * notice, this list of conditions and the following disclaimer.
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13 * documentation and/or other materials provided with the distribution.
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19 * THIS SOFTWARE IS PROVIDED BY RED HAT AND CONTRIBUTORS ''AS IS'' AND
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48 main (int argc
, char *argv
[])
52 time_t start_t
, end_t
;
54 if (test_start_nbdkit ("--filter", "delay",
56 "wdelay=10", NULL
) == -1)
59 g
= guestfs_create ();
61 perror ("guestfs_create");
65 r
= guestfs_add_drive_opts (g
, "",
66 GUESTFS_ADD_DRIVE_OPTS_FORMAT
, "raw",
67 GUESTFS_ADD_DRIVE_OPTS_PROTOCOL
, "nbd",
68 GUESTFS_ADD_DRIVE_OPTS_SERVER
, server
,
73 if (guestfs_launch (g
) == -1)
76 /* Reads should work as normal. Do lots of small reads here so
77 * we will notice if they are being delayed.
79 for (i
= 0; i
< 100; ++i
) {
83 data
= guestfs_pread_device (g
, "/dev/sda", 512, 51200-512*i
, &n
);
89 /* Writes should be delayed by >= 10 seconds. */
91 if (guestfs_pwrite_device (g
, "/dev/sda", "hello", 5, 100000) == -1)
93 if (guestfs_sync (g
) == -1)
97 if (end_t
- start_t
< 10) {
98 fprintf (stderr
, "%s FAILED: no write delay detected\n", program_name
);