#include <xfs/xfs.h>
#include <fcntl.h>
#include <unistd.h>
#include <iostream>

using namespace std;

#if 0
typedef struct xfs_flock64 {
        __s16           l_type;
        __s16           l_whence;
        __s64           l_start;
        __s64           l_len;          /* len == 0 means until end of file */
        __s32           l_sysid;
        __u32           l_pid;
        __s32           l_pad[4];       /* reserve area                     */
} xfs_flock64_t;
#endif

int main(int argc, char** argv) {
  assert(argc == 2);

  int fd = open(argv[1], O_RDWR);
  assert(fd >= 0);

  assert(platform_test_xfs_fd(fd));
  xfs_flock64_t cmd;
  memset(&cmd, 0, sizeof(cmd));
  cmd.l_whence = 0; // from star tof file
  cmd.l_start = 0;
  cmd.l_len = 4096;
  int ret = xfsctl(NULL, fd, XFS_IOC_UNRESVSP64, &cmd);
  cout << ret << endl;

  close(fd);
  return 0;
}