[PATCH] erofs: add "noinline_data" extended option

[Gao Xiang]

On Mon, Jul 05, 2021 at 12:18:38AM +0800, 胡玮文 wrote:
> Should the commit message starts with “erofs-utils:” instead of “erofs:”?

Hi Weiwen,
yeah, you are right, let me revise it in the morning...

Thanks,
Gao Xiang

> 
> > 在 2021年7月4日，21:41，Gao Xiang <hsiangkao at linux.alibaba.com> 写道：
> > 
> > In order to add preliminary DAX feature support.
> > 
> > Signed-off-by: Gao Xiang <hsiangkao at linux.alibaba.com>
> > ---
> > include/erofs/config.h | 1 +
> > lib/inode.c            | 5 +++++
> > mkfs/main.c            | 6 ++++++
> > 3 files changed, 12 insertions(+)
> > 
> > diff --git a/include/erofs/config.h b/include/erofs/config.h
> > index 67e7a0fed24c..8124f3b36baf 100644
> > --- a/include/erofs/config.h
> > +++ b/include/erofs/config.h
> > @@ -44,6 +44,7 @@ struct erofs_configure {
> >    bool c_random_pclusterblks;
> > #endif
> >    char c_timeinherit;
> > +    bool c_noinline_data;
> > 
> > #ifdef HAVE_LIBSELINUX
> >    struct selabel_handle *sehnd;
> > diff --git a/lib/inode.c b/lib/inode.c
> > index 97f0cf763baf..38906370f533 100644
> > --- a/lib/inode.c
> > +++ b/lib/inode.c
> > @@ -562,6 +562,11 @@ static int erofs_prepare_inode_buffer(struct erofs_inode *inode)
> >    if (is_inode_layout_compression(inode))
> >        goto noinline;
> > 
> > +    if (cfg.c_noinline_data && S_ISREG(inode->i_mode)) {
> > +        inode->datalayout = EROFS_INODE_FLAT_PLAIN;
> > +        goto noinline;
> > +    }
> > +
> >    /*
> >     * if the file size is block-aligned for uncompressed files,
> >     * should use EROFS_INODE_FLAT_PLAIN data mapping mode.
> > diff --git a/mkfs/main.c b/mkfs/main.c
> > index 28539da5ea5f..10fe14d7a722 100644
> > --- a/mkfs/main.c
> > +++ b/mkfs/main.c
> > @@ -161,6 +161,12 @@ static int parse_extended_opts(const char *opts)
> >                return -EINVAL;
> >            erofs_sb_clear_sb_chksum();
> >        }
> > +
> > +        if (MATCH_EXTENTED_OPT("noinline_data", token, keylen)) {
> > +            if (vallen)
> > +                return -EINVAL;
> > +            cfg.c_noinline_data = true;
> > +        }
> >    }
> >    return 0;
> > }
> > -- 
> > 2.24.4