[LTP] [PATCH 1/5] mremap01: Convert to new API

[Cyril Hrubis]

Hi!
> -	/*
> -	 * Call mmap to map virtual memory (memsize bytes) from the
> -	 * beginning of temporary file (offset is 0) into memory.
> -	 */
> -	addr = mmap(0, memsize, PROT_WRITE, MAP_SHARED, fildes, 0);
> +	for (ind = 0; ind < newsize; ind++)
> +		addr[ind] = (char)ind;
>  
> -	/* Check for the return value of mmap() */
> -	if (addr == (char *)MAP_FAILED) {
> -		tst_brkm(TBROK, cleanup, "mmaping Failed on %s", TEMPFILE);
> -	}
> +	SAFE_MSYNC(addr, newsize, MS_SYNC);
>  
> -	/* Stretch the file to newsize of virtual memory block */
> -	if (lseek(fildes, (off_t) newsize, SEEK_SET) != (off_t) newsize) {
> -		tst_brkm(TBROK, cleanup, "lseek() to %d offset pos. Failed, "
> -			 "error=%d : %s", newsize, errno, strerror(errno));
> -	}
> +	if (verify_file())
> +		tst_res(TFAIL, "mremap()'d region did not sync to the file");
> +	else
> +		tst_res(TPASS, "Functionality of mremap() is correct");
>  
> -	/* Write one byte data into temporary file */
> -	if (write(fildes, "\0", 1) != 1) {
> -		tst_brkm(TBROK | TERRNO, cleanup, "writing to %s failed",
> -			 TEMPFILE);
> -	}

We should probably ftruncate(fd, 0) here so that we start with the same
state on -i 10.

> +	SAFE_MUNMAP(addr, newsize);
> +	addr = MAP_FAILED;

Can we patch SAFE_MUNMAP() to set the addr to MAP_FAILED as we do in
SAFE_CLOSE()?


Otherwise:
Reviewed-by: Cyril Hrubis <chrubis@suse.cz>

-- 
Cyril Hrubis
chrubis@suse.cz