Attachment 12557 Details for Bug 11588 – Test program to show that fallocate followed by punch hole works just fine....

Test program to show that fallocate followed by punch hole works just fine....

test-fallocate.c (text/x-csrc), 999 bytes, created by Theodore Ts'o on 2016-10-08 23:31:03 UTC

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Creator: Theodore Ts'o

Created: 2016-10-08 23:31:03 UTC

Size: 999 bytes

patch

obsolete

>#ifndef _LARGEFILE_SOURCE
>#define _LARGEFILE_SOURCE
>#endif
>#ifndef _LARGEFILE64_SOURCE
>#define _LARGEFILE64_SOURCE
>#endif
>
>#include <sys/stat.h>
>#include <sys/syscall.h>
>#include <sys/types.h>
>#include <fcntl.h>
>#include <stdio.h>
>#include <stdlib.h>
>#include <unistd.h>
>#include <ctype.h>
>
>// #include <linux/falloc.h>
>#define FALLOC_FL_KEEP_SIZE	0x01
>#define FALLOC_FL_PUNCH_HOLE	0x02 /* de-allocates range */
>#define FALLOC_FL_COLLAPSE_RANGE	0x08
>#define FALLOC_FL_ZERO_RANGE		0x10
>
>int main(int argc, char **argv)
>{
>	int	fd;
>	int	error;
>
>	fd = open("test-file", O_WRONLY|O_LARGEFILE|O_CREAT|O_TRUNC, 0700);
>	if (fd < 0) {
>		perror("Error opening file");
>		exit(EXIT_FAILURE);
>	}
>
>	error = syscall(SYS_fallocate, fd, 0, 0, 1024 * 1024);
>	if (error < 0) {
>		perror("fallocate failed");
>		exit(1);
>	}
>
>	error = syscall(SYS_fallocate, fd,
>			FALLOC_FL_KEEP_SIZE|FALLOC_FL_PUNCH_HOLE,
>			32 * 1024, 32 * 1024);
>	if (error < 0) {
>		perror("punch hole failed");
>		exit(1);
>	}
>
>	close(fd);
>	return 0;
>}

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Attachments on bug 11588: 12556 | 12557