You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
54 lines
1.1 KiB
54 lines
1.1 KiB
/* Tests for the VND driver API. Part of testvnd.sh. */
|
|
#include <stdlib.h>
|
|
#include <stdio.h>
|
|
#include <sys/ioctl.h>
|
|
#include <unistd.h>
|
|
#include <fcntl.h>
|
|
#include <errno.h>
|
|
#include <string.h>
|
|
|
|
/*
|
|
* For now, just test the most dreaded case: the driver being told to use the
|
|
* file descriptor used to configure the device. Without appropriate checks,
|
|
* this would cause a deadlock in VFS, since the corresponding filp object is
|
|
* locked to perform the ioctl(2) call when VFS gets the copyfd(2) back-call.
|
|
*/
|
|
int
|
|
main(int argc, char **argv)
|
|
{
|
|
struct vnd_ioctl vnd;
|
|
int fd;
|
|
|
|
if (argc != 2) {
|
|
fprintf(stderr, "usage: %s /dev/vnd0\n", argv[0]);
|
|
return EXIT_FAILURE;
|
|
}
|
|
|
|
if ((fd = open(argv[1], O_RDONLY)) < 0) {
|
|
perror("open");
|
|
return EXIT_FAILURE;
|
|
}
|
|
|
|
memset(&vnd, 0, sizeof(vnd));
|
|
|
|
if (ioctl(fd, VNDIOCCLR, &vnd) < 0) {
|
|
perror("ioctl(VNDIOCCLR)");
|
|
return EXIT_FAILURE;
|
|
}
|
|
|
|
vnd.vnd_fildes = fd;
|
|
|
|
if (ioctl(fd, VNDIOCSET, &vnd) >= 0) {
|
|
fprintf(stderr, "ioctl(VNDIOCSET): unexpected success\n");
|
|
return EXIT_FAILURE;
|
|
}
|
|
|
|
if (errno != EBADF) {
|
|
perror("ioctl(VNDIOCSET)");
|
|
return EXIT_FAILURE;
|
|
}
|
|
|
|
close(fd);
|
|
|
|
return EXIT_SUCCESS;
|
|
}
|
|
|