linux-kernel - Re: [PATCH RFC] f2fs: compress: add compress_flag in struct f2fs_comp

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Message-ID: <X9JZn2ELSZISEQpU@google.com>
Date:   Thu, 10 Dec 2020 09:23:43 -0800
From:   Jaegeuk Kim <jaegeuk@...nel.org>
To:     Chao Yu <yuchao0@...wei.com>
Cc:     linux-f2fs-devel@...ts.sourceforge.net,
        linux-kernel@...r.kernel.org, chao@...nel.org
Subject: Re: [PATCH RFC] f2fs: compress: add compress_flag in struct
 f2fs_comp_option

On 12/10, Chao Yu wrote:
> Add a extra field compress_flag to get/set more compress option from/to
> compressed inode.
> 
> Signed-off-by: Chao Yu <yuchao0@...wei.com>
> ---
> 
> Daeho, Jaegeuk,
> 
> Could you please check whether we could add this new field to struct
> f2fs_comp_option? so we can expand to allow user to query/config more
> options of compressed inode via new ioctl.
> 
> It needs to consider before original patches goes to merge window, let
> me know you have other concerns.

Chao, I think it'd hard to add this at time point, unless there's critical
info that we need to set very urgently.

> 
>  fs/f2fs/file.c            | 1 +
>  include/uapi/linux/f2fs.h | 1 +
>  2 files changed, 2 insertions(+)
> 
> diff --git a/fs/f2fs/file.c b/fs/f2fs/file.c
> index 16ea10f2bcf5..fbf06311c88d 100644
> --- a/fs/f2fs/file.c
> +++ b/fs/f2fs/file.c
> @@ -3965,6 +3965,7 @@ static int f2fs_ioc_get_compress_option(struct file *filp, unsigned long arg)
>  
>  	option.algorithm = F2FS_I(inode)->i_compress_algorithm;
>  	option.log_cluster_size = F2FS_I(inode)->i_log_cluster_size;
> +	option.compress_flag = F2FS_I(inode)->i_compress_flag;
>  
>  	inode_unlock_shared(inode);
>  
> diff --git a/include/uapi/linux/f2fs.h b/include/uapi/linux/f2fs.h
> index 352a822d4370..2b9c4c99ceee 100644
> --- a/include/uapi/linux/f2fs.h
> +++ b/include/uapi/linux/f2fs.h
> @@ -93,6 +93,7 @@ struct f2fs_sectrim_range {
>  struct f2fs_comp_option {
>  	__u8 algorithm;
>  	__u8 log_cluster_size;
> +	__u16 compress_flag;
>  };
>  
>  #endif /* _UAPI_LINUX_F2FS_H */
> -- 
> 2.29.2