linux-ext4 - Re: [PATCH 0/4] statx: expose the fs-verity bit

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Message-ID: <20191106215719.GD139580@gmail.com>
Date:   Wed, 6 Nov 2019 13:57:20 -0800
From:   Eric Biggers <ebiggers@...nel.org>
To:     linux-fscrypt@...r.kernel.org
Cc:     linux-fsdevel@...r.kernel.org, linux-ext4@...r.kernel.org,
        linux-f2fs-devel@...ts.sourceforge.net, linux-api@...r.kernel.org,
        David Howells <dhowells@...hat.com>,
        Theodore Ts'o <tytso@....edu>,
        Jaegeuk Kim <jaegeuk@...nel.org>,
        Victor Hsieh <victorhsieh@...gle.com>
Subject: Re: [PATCH 0/4] statx: expose the fs-verity bit

On Tue, Oct 29, 2019 at 01:41:37PM -0700, Eric Biggers wrote:
> This patchset exposes the verity bit (a.k.a. FS_VERITY_FL) via statx().
> 
> This is useful because it allows applications to check whether a file is
> a verity file without opening it.  Opening a verity file can be
> expensive because the fsverity_info is set up on open, which involves
> parsing metadata and optionally verifying a cryptographic signature.
> 
> This is analogous to how various other bits are exposed through both
> FS_IOC_GETFLAGS and statx(), e.g. the encrypt bit.
> 
> This patchset applies to v5.4-rc5.
> 
> Eric Biggers (4):
>   statx: define STATX_ATTR_VERITY
>   ext4: support STATX_ATTR_VERITY
>   f2fs: support STATX_ATTR_VERITY
>   docs: fs-verity: mention statx() support
> 
>  Documentation/filesystems/fsverity.rst | 8 ++++++++
>  fs/ext4/inode.c                        | 5 ++++-
>  fs/f2fs/file.c                         | 5 ++++-
>  include/linux/stat.h                   | 3 ++-
>  include/uapi/linux/stat.h              | 2 +-
>  5 files changed, 19 insertions(+), 4 deletions(-)
> 

Any more comments on this?

- Eric