From: Andreas Dilger <adilger@dilger.ca>
To: Eric Biggers <ebiggers@kernel.org>
Cc: linux-fscrypt@vger.kernel.org,
Linux FS-devel Mailing List <linux-fsdevel@vger.kernel.org>,
Ext4 Developers List <linux-ext4@vger.kernel.org>,
linux-f2fs-devel@lists.sourceforge.net,
linux-api@vger.kernel.org, David Howells <dhowells@redhat.com>,
Theodore Ts'o <tytso@mit.edu>, Jaegeuk Kim <jaegeuk@kernel.org>,
Victor Hsieh <victorhsieh@google.com>
Subject: Re: [PATCH 1/4] statx: define STATX_ATTR_VERITY
Date: Wed, 30 Oct 2019 12:26:10 -0600 [thread overview]
Message-ID: <7C96E996-D52F-4901-9F64-B2C40A889829@dilger.ca> (raw)
In-Reply-To: <20191029204141.145309-2-ebiggers@kernel.org>
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On Oct 29, 2019, at 2:41 PM, Eric Biggers <ebiggers@kernel.org> wrote:
>
> From: Eric Biggers <ebiggers@google.com>
>
> Add a statx attribute bit STATX_ATTR_VERITY which will be set if the
> file has fs-verity enabled. This is the statx() equivalent of
> FS_VERITY_FL which is returned by FS_IOC_GETFLAGS.
>
> 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.
>
> Signed-off-by: Eric Biggers <ebiggers@google.com>
Reviewed-by: Andreas Dilger <adilger@dilger.ca>
> ---
> include/linux/stat.h | 3 ++-
> include/uapi/linux/stat.h | 2 +-
> 2 files changed, 3 insertions(+), 2 deletions(-)
>
> diff --git a/include/linux/stat.h b/include/linux/stat.h
> index 765573dc17d659..528c4baad09146 100644
> --- a/include/linux/stat.h
> +++ b/include/linux/stat.h
> @@ -33,7 +33,8 @@ struct kstat {
> STATX_ATTR_IMMUTABLE | \
> STATX_ATTR_APPEND | \
> STATX_ATTR_NODUMP | \
> - STATX_ATTR_ENCRYPTED \
> + STATX_ATTR_ENCRYPTED | \
> + STATX_ATTR_VERITY \
> )/* Attrs corresponding to FS_*_FL flags */
> u64 ino;
> dev_t dev;
> diff --git a/include/uapi/linux/stat.h b/include/uapi/linux/stat.h
> index 7b35e98d3c58b1..ad80a5c885d598 100644
> --- a/include/uapi/linux/stat.h
> +++ b/include/uapi/linux/stat.h
> @@ -167,8 +167,8 @@ struct statx {
> #define STATX_ATTR_APPEND 0x00000020 /* [I] File is append-only */
> #define STATX_ATTR_NODUMP 0x00000040 /* [I] File is not to be dumped */
> #define STATX_ATTR_ENCRYPTED 0x00000800 /* [I] File requires key to decrypt in fs */
> -
> #define STATX_ATTR_AUTOMOUNT 0x00001000 /* Dir: Automount trigger */
> +#define STATX_ATTR_VERITY 0x00100000 /* [I] Verity protected file */
>
>
> #endif /* _UAPI_LINUX_STAT_H */
> --
> 2.24.0.rc1.363.gb1bccd3e3d-goog
>
Cheers, Andreas
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next prev parent reply other threads:[~2019-10-30 18:26 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-10-29 20:41 [PATCH 0/4] statx: expose the fs-verity bit Eric Biggers
2019-10-29 20:41 ` [PATCH 1/4] statx: define STATX_ATTR_VERITY Eric Biggers
2019-10-30 18:26 ` Andreas Dilger [this message]
2019-11-07 1:44 ` Darrick J. Wong
2019-11-07 2:05 ` Andreas Dilger
2019-11-07 22:02 ` [man-pages RFC PATCH] statx.2: document STATX_ATTR_VERITY Eric Biggers
2019-11-08 0:47 ` Darrick J. Wong
2019-11-08 8:23 ` walter harms
2019-11-08 19:35 ` Eric Biggers
2019-11-09 19:34 ` walter harms
2019-11-13 20:31 ` Eric Biggers
2019-11-07 22:12 ` [PATCH 1/4] statx: define STATX_ATTR_VERITY Eric Biggers
2019-10-29 20:41 ` [PATCH 2/4] ext4: support STATX_ATTR_VERITY Eric Biggers
2019-10-30 18:27 ` Andreas Dilger
2019-10-29 20:41 ` [PATCH 3/4] f2fs: " Eric Biggers
2019-10-29 20:41 ` [PATCH 4/4] docs: fs-verity: mention statx() support Eric Biggers
2019-11-06 21:57 ` [PATCH 0/4] statx: expose the fs-verity bit Eric Biggers
2019-11-13 20:20 ` Eric Biggers
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