linux-ext4 - Re: [PATCH 1/4] fs: introduce SB

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Date:   Wed, 17 Jun 2020 10:46:59 -0700
From:   Jaegeuk Kim <jaegeuk@...nel.org>
To:     Satya Tangirala <satyat@...gle.com>
Cc:     linux-fscrypt@...r.kernel.org, linux-fsdevel@...r.kernel.org,
        linux-f2fs-devel@...ts.sourceforge.net, linux-ext4@...r.kernel.org
Subject: Re: [PATCH 1/4] fs: introduce SB_INLINECRYPT

On 06/17, Satya Tangirala wrote:
> Introduce SB_INLINECRYPT, which is set by filesystems that wish to use
> blk-crypto for file content en/decryption. This flag maps to the
> '-o inlinecrypt' mount option which multiple filesystems will implement,
> and code in fs/crypto/ needs to be able to check for this mount option
> in a filesystem-independent way.
> 
> Signed-off-by: Satya Tangirala <satyat@...gle.com>

Reviewed-by: Jaegeuk Kim <jaegeuk@...nel.org>

> ---
>  fs/proc_namespace.c | 1 +
>  include/linux/fs.h  | 1 +
>  2 files changed, 2 insertions(+)
> 
> diff --git a/fs/proc_namespace.c b/fs/proc_namespace.c
> index 3059a9394c2d..e0ff1f6ac8f1 100644
> --- a/fs/proc_namespace.c
> +++ b/fs/proc_namespace.c
> @@ -49,6 +49,7 @@ static int show_sb_opts(struct seq_file *m, struct super_block *sb)
>  		{ SB_DIRSYNC, ",dirsync" },
>  		{ SB_MANDLOCK, ",mand" },
>  		{ SB_LAZYTIME, ",lazytime" },
> +		{ SB_INLINECRYPT, ",inlinecrypt" },
>  		{ 0, NULL }
>  	};
>  	const struct proc_fs_opts *fs_infop;
> diff --git a/include/linux/fs.h b/include/linux/fs.h
> index 6c4ab4dc1cd7..abef6aa95524 100644
> --- a/include/linux/fs.h
> +++ b/include/linux/fs.h
> @@ -1380,6 +1380,7 @@ extern int send_sigurg(struct fown_struct *fown);
>  #define SB_NODIRATIME	2048	/* Do not update directory access times */
>  #define SB_SILENT	32768
>  #define SB_POSIXACL	(1<<16)	/* VFS does not apply the umask */
> +#define SB_INLINECRYPT	(1<<17)	/* Use blk-crypto for encrypted files */
>  #define SB_KERNMOUNT	(1<<22) /* this is a kern_mount call */
>  #define SB_I_VERSION	(1<<23) /* Update inode I_version field */
>  #define SB_LAZYTIME	(1<<25) /* Update the on-disk [acm]times lazily */
> -- 
> 2.27.0.290.gba653c62da-goog