/* DF-3061 client side: hammer NFS RENAME (v3) on src/dst over the mount.
 * Run on the machine that has the server's export mounted (the guest can
 * mount its own export over loopback).
 */
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <fcntl.h>
#include <sys/wait.h>

static const char *dirpath;

int
main(int argc, char **argv)
{
	int i, n = 4;
	if (argc < 2) {
		fprintf(stderr, "usage: %s <mounted-export-dir>\n", argv[0]);
		exit(2);
	}
	dirpath = argv[1];
	for (i = 0; i < n; i++) {
		pid_t p = fork();
		if (p == 0) {
			char a[512], b[512];
			snprintf(a, sizeof(a), "%s/src%d", dirpath, i);
			snprintf(b, sizeof(b), "%s/dst%d", dirpath, i);
			for (;;) {
				int fd = open(a, O_CREAT, 0666);
				if (fd >= 0)
					close(fd);
				rename(a, b);
				rename(b, a);
				unlink(a);
				unlink(b);
			}
		}
	}
	for (;;)
		pause();
	return 0;
}