1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
|
#include <stdio.h>
#include <unistd.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <errno.h>
#include <string.h>
/*
* This function opens a file and to trigger migration failure, unlinks the
* file and performs graph switch (cmd passed in argv). If everything goes fine,
* fsync should fail without crashing the mount process.
*/
int
main(int argc, char **argv)
{
int ret = 0;
int fd = 0;
char *cmd = argv[1];
struct stat stbuf = {
0,
};
printf("cmd is: %s\n", cmd);
fd = open("a.txt", O_CREAT | O_RDWR, 0644);
if (fd < 0)
printf("open failed: %s\n", strerror(errno));
ret = unlink("a.txt");
if (ret < 0)
printf("unlink failed: %s\n", strerror(errno));
if (write(fd, "abc", 3) < 0)
printf("Not able to print %s\n", strerror(errno));
system(cmd);
sleep(1); /* No way to confirm graph switch so sleep 1 */
ret = fstat(fd, &stbuf);
if (ret < 0)
printf("fstat failed %\n", strerror(errno));
ret = fsync(fd);
if (ret < 0)
printf("Not able to fsync %s\n", strerror(errno));
return 0;
}
|
