Re: [PATCH] ext4: fix a bug when we try to open a file with O_TMPFILE flag

[Zheng Liu <gnehzuil.liu@gmail.com>]

On Tue, Jul 23, 2013 at 07:51:41AM +0000, jon ernst wrote:
> Hi Zheng,
> 
> I updated my kernel code to this commit, built kernel and loaded this kernel.
> I checked "uname -r", it is 3.11.0-rc1+ But when I run your test code,
> I always got "O_TMPFILE" undeclared.
> Could you please help, what could be wrong? (I included fcntl.h)

Ah, actually I used the following program to hit the bug.  Just for your
information.  Please let me know if you have any question.

Regards,
                                                - Zheng

#include <stdio.h>
#include <stdlib.h>
#include <string.h>

#include <unistd.h>
#include <sys/types.h>
#include <fcntl.h>

#define __O_TMPFILE	020000000
#define O_TMPFILE (__O_TMPFILE | O_DIRECTORY)

int main(int argc, char *argv[])
{
	int fd;

	fd = open(argv[1], O_RDWR|O_TMPFILE);
	if (fd < 0) {
		perror("open ");
		return -1;
	}
	close(fd);
	return 0;
}