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

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Message-ID: <CAOqdbhdyaNg3RoGF0+gJ=6wX4YDrgpfuVDsuAg05BSp3dmZKww@mail.gmail.com>
Date:   Fri, 10 Jan 2020 17:58:21 +0800
From:   xiong ping <xp1982.06.06@...il.com>
To:     Chao Yu <yuchao0@...wei.com>
Cc:     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>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [f2fs-dev] [PATCH] resize.f2fs: add option for large_nat_bitmap feature

Chao Yu <yuchao0@...wei.com> 于2020年1月9日周四 下午3:16写道：
>
> 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?
>
I have resend the patch with this email account yesterday, can 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?
>
yes, the feature is off by default, so we need an option to enable 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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>
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