[PATCH] erofs: add "noinline_data" extended option

[胡玮文]

Should the commit message starts with “erofs-utils:” instead of “erofs:”?

> 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