/*
 * regression test for bug in ext4_seek_data
 *  (C) Dmitry Monakhov 
 * original report https://lkml.org/lkml/2014/10/16/620
 */		
#define _GNU_SOURCE
#define _LARGEFILE_SOURCE
#define _FILE_OFFSET_BITS 64
#include <sys/types.h>
#include <unistd.h>
#include <fcntl.h>

#ifndef SEEK_DATA
#define SEEK_DATA       3
#endif

int main(int argc, char **argv)
{
        int fd;
        loff_t size = 1ULL << 40;
        fd = open("test", O_RDWR|O_CREAT, 0777);
        ftruncate(fd, size);
        size = 1ULL << 39;
	/* Next line will likely spin forever :) */
        llseek(fd, size, SEEK_DATA);
        return 0;
}