linux-kernel - Re: [f2fs-dev][PATCH] resize.f2fs: add option for large_nat

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Message-ID: <d48d8d65-1308-278c-db86-0806a0c3637a@huawei.com>
Date:   Thu, 9 Jan 2020 15:14:20 +0800
From:   Chao Yu <yuchao0@...wei.com>
To:     Ping1 Xiong 熊平 <xiongping1@...omi.com>,
        "linux-f2fs-devel@...ts.sourceforge.net" 
        <linux-f2fs-devel@...ts.sourceforge.net>,
        "jaegeuk@...nel.org" <jaegeuk@...nel.org>
CC:     "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [f2fs-dev][PATCH] resize.f2fs: add option for large_nat_bitmap
 feature

On 2020/1/8 19:20, Ping1 Xiong 熊平 wrote:
> From d5b8411dbae37180c37d96bf164fab16138fc21a Mon Sep 17 00:00:00 2001
> 
> From: xiongping1 <xiongping1@...omi.com>
> Date: Wed, 8 Jan 2020 17:20:55 +0800
> Subject: [PATCH] resize.f2fs: add option for large_nat_bitmap feature

Thanks for your contribution.

The patch format is incorrect, I guess it was changed by email client or when
you paste patch's content, could you check it?

> 
> resize.f2fs has already supported large_nat_bitmap feature, but has no
> option to turn on it.
> 
> This change add a new '-i' option to control turning on/off it.

We only add a option to turn on this feature, right? rather than turning
on or off it?

Thanks,

> 
> Signed-off-by: xiongping1 <xiongping1@...omi.com>
> ---
>  fsck/main.c   | 6 +++++-
>  fsck/resize.c | 5 +++++
>  2 files changed, 10 insertions(+), 1 deletion(-)
> 
> diff --git a/fsck/main.c b/fsck/main.c
> index 9a7d499..e7e3dfc 100644
> --- a/fsck/main.c
> +++ b/fsck/main.c
> @@ -104,6 +104,7 @@ void resize_usage()
>          MSG(0, "\nUsage: resize.f2fs [options] device\n");
>          MSG(0, "[options]:\n");
>          MSG(0, "  -d debug level [default:0]\n");
> +       MSG(0, "  -i extended node bitmap, node ratio is 20%% by default\n");
>          MSG(0, "  -s safe resize (Does not resize metadata)");
>          MSG(0, "  -t target sectors [default: device size]\n");
>          MSG(0, "  -V print the version number and exit\n");
> @@ -449,7 +450,7 @@ void f2fs_parse_options(int argc, char *argv[])
>                                  break;
>                  }
>          } else if (!strcmp("resize.f2fs", prog)) {
> -               const char *option_string = "d:st:V";
> +               const char *option_string = "d:st:iV";
>  
>                  c.func = RESIZE;
>                  while ((option = getopt(argc, argv, option_string)) != EOF) {
> @@ -476,6 +477,9 @@ void f2fs_parse_options(int argc, char *argv[])
>                                          ret = sscanf(optarg, "%"PRIx64"",
>                                                          &c.target_sectors);
>                                  break;
> +                       case 'i':
> +                               c.large_nat_bitmap = 1;
> +                               break;
>                          case 'V':
>                                  show_version(prog);
>                                  exit(0);
> diff --git a/fsck/resize.c b/fsck/resize.c
> index fc563f2..88e063e 100644
> --- a/fsck/resize.c
> +++ b/fsck/resize.c
> @@ -519,6 +519,11 @@ static void rebuild_checkpoint(struct f2fs_sb_info *sbi,
>          else
>                  set_cp(checksum_offset, CP_CHKSUM_OFFSET);
>  
> +       if (c.large_nat_bitmap) {
> +               set_cp(checksum_offset, CP_MIN_CHKSUM_OFFSET);
> +               flags |= CP_LARGE_NAT_BITMAP_FLAG;
> +       }
> +
>          set_cp(ckpt_flags, flags);
>  
>          memcpy(new_cp, cp, (unsigned char *)cp->sit_nat_version_bitmap -
> -- 
> 2.7.4
> 
> 
> 
> 
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