linux-kernel - Re: [PATCH v2] f2fs_io: expend fallocate command

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Date:   Thu, 8 Jun 2023 09:56:02 +0800
From:   Chao Yu <chao@...nel.org>
To:     Yangtao Li <frank.li@...o.com>, jaegeuk@...nel.org
Cc:     linux-f2fs-devel@...ts.sourceforge.net,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2] f2fs_io: expend fallocate command

On 2023/6/7 22:56, Yangtao Li wrote:
> Expend fallocate command to support more flags.
> 
> Signed-off-by: Yangtao Li <frank.li@...o.com>
> ---
>   tools/f2fs_io/f2fs_io.c | 39 +++++++++++++++++++++++++++++++++------
>   1 file changed, 33 insertions(+), 6 deletions(-)
> 
> diff --git a/tools/f2fs_io/f2fs_io.c b/tools/f2fs_io/f2fs_io.c
> index 1774eca..5a6a6a0 100644
> --- a/tools/f2fs_io/f2fs_io.c
> +++ b/tools/f2fs_io/f2fs_io.c
> @@ -413,9 +413,13 @@ static void do_pinfile(int argc, char **argv, const struct cmd_desc *cmd)
>   
>   #define fallocate_desc "fallocate"
>   #define fallocate_help						\
> -"f2fs_io fallocate [keep_size] [offset] [length] [file]\n\n"	\
> +"f2fs_io fallocate [-cipz] [keep_size] [offset] [length] [file]\n\n"	\

Yangtao,

It missed to update man/f2fs_io.8.

Thanks,

>   "fallocate given the file\n"					\
>   " [keep_size] : 1 or 0\n"					\
> +" -p : punch hole\n"						\
> +" -c : collapse range\n"					\
> +" -z : zero range\n"						\
> +" -i : insert range\n"						\
>   
>   static void do_fallocate(int argc, char **argv, const struct cmd_desc *cmd)
>   {
> @@ -423,20 +427,43 @@ static void do_fallocate(int argc, char **argv, const struct cmd_desc *cmd)
>   	off_t offset, length;
>   	struct stat sb;
>   	int mode = 0;
> +	int c;
>   
> -	if (argc != 5) {
> +	while ((c = getopt(argc, argv, "cipz")) != -1) {
> +		switch (c) {
> +		case 'c':
> +			mode |= FALLOC_FL_COLLAPSE_RANGE;
> +			break;
> +		case 'i':
> +			mode |= FALLOC_FL_INSERT_RANGE;
> +			break;
> +		case 'p':
> +			mode |= FALLOC_FL_PUNCH_HOLE;
> +			break;
> +		case 'z':
> +			mode |= FALLOC_FL_ZERO_RANGE;
> +			break;
> +		default:
> +			fputs(cmd->cmd_help, stderr);
> +			exit(2);
> +		}
> +	}
> +	argc -= optind;
> +	argv += optind;
> +
> +	if (argc != 4) {
>   		fputs("Excess arguments\n\n", stderr);
>   		fputs(cmd->cmd_help, stderr);
>   		exit(1);
>   	}
>   
> -	if (!strcmp(argv[1], "1"))
> +	if (!strcmp(argv[0], "1"))
>   		mode |= FALLOC_FL_KEEP_SIZE;
>   
> -	offset = atoi(argv[2]);
> -	length = atoll(argv[3]);
> +	offset = atoi(argv[1]);
> +	length = atoll(argv[2]);
>   
> -	fd = xopen(argv[4], O_RDWR, 0);
> +	fd = xopen(argv[3], O_RDWR, 0);
>   
>   	if (fallocate(fd, mode, offset, length) != 0)
>   		die_errno("fallocate failed");