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[70.77.216.213]) by smtp.gmail.com with ESMTPSA id 39sm4053067pjo.7.2019.10.30.11.26.13 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Wed, 30 Oct 2019 11:26:16 -0700 (PDT) From: Andreas Dilger Message-Id: <7C96E996-D52F-4901-9F64-B2C40A889829@dilger.ca> Content-Type: multipart/signed; boundary="Apple-Mail=_540B1263-203B-43E9-BA92-ABF36413FD90"; protocol="application/pgp-signature"; micalg=pgp-sha256 Mime-Version: 1.0 (Mac OS X Mail 10.3 \(3273\)) Subject: Re: [PATCH 1/4] statx: define STATX_ATTR_VERITY Date: Wed, 30 Oct 2019 12:26:10 -0600 In-Reply-To: <20191029204141.145309-2-ebiggers@kernel.org> Cc: linux-fscrypt@vger.kernel.org, Linux FS-devel Mailing List , Ext4 Developers List , linux-f2fs-devel@lists.sourceforge.net, linux-api@vger.kernel.org, David Howells , Theodore Ts'o , Jaegeuk Kim , Victor Hsieh To: Eric Biggers References: <20191029204141.145309-1-ebiggers@kernel.org> <20191029204141.145309-2-ebiggers@kernel.org> X-Mailer: Apple Mail (2.3273) Sender: linux-fscrypt-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-fscrypt@vger.kernel.org --Apple-Mail=_540B1263-203B-43E9-BA92-ABF36413FD90 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset=us-ascii On Oct 29, 2019, at 2:41 PM, Eric Biggers wrote: >=20 > From: Eric Biggers >=20 > 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. >=20 > 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. >=20 > This is analogous to how various other bits are exposed through both > FS_IOC_GETFLAGS and statx(), e.g. the encrypt bit. >=20 > Signed-off-by: Eric Biggers Reviewed-by: Andreas Dilger > --- > include/linux/stat.h | 3 ++- > include/uapi/linux/stat.h | 2 +- > 2 files changed, 3 insertions(+), 2 deletions(-) >=20 > 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 */ >=20 >=20 > #endif /* _UAPI_LINUX_STAT_H */ > -- > 2.24.0.rc1.363.gb1bccd3e3d-goog >=20 Cheers, Andreas --Apple-Mail=_540B1263-203B-43E9-BA92-ABF36413FD90 Content-Transfer-Encoding: 7bit Content-Disposition: attachment; filename=signature.asc Content-Type: application/pgp-signature; name=signature.asc Content-Description: Message signed with OpenPGP -----BEGIN PGP SIGNATURE----- Comment: GPGTools - http://gpgtools.org iQIzBAEBCAAdFiEEDb73u6ZejP5ZMprvcqXauRfMH+AFAl251cMACgkQcqXauRfM H+DZ+xAAhLyZsNstVnuqyPFkwbCFPUlVQ0TjfHLGBCf1GxKf+I8XJCgAQdG4VJeb H5U3+9NMn5JZP/e0hGGGCnZtE7LpLRkQ7ja4hRS3cDS1eieU5JL7j2DYhCvAplsr +WieKbYKUXLPByc5+fRW+VIRUkNPLl03IflKpo+746OnT0KMu/NfpViWbiVyuFyd bRoKMEwAhyRCgAgYXHQ6Rjyl/rUAA7jnI1Coau5KB9u4NdKsDheF3l7FMiENEpKc Za3SXo6Cq7N7KDu9E2YwD6jGPZx7uD3b0tpVIkc8D2zYgxFwwzFZmmh0P8/3hVd2 UJY8adBQ4RKGtbYfjtznKPRb9kiEWeevRCwEfwtU7W5LQ0jOi37WdfSlHeIVbvqQ FrhGKiV9jQYG4HHu42CB0mcacmOZb0xNRjivgSJQYvNCwK1VCwWn+ATLAuONN458 9ScrS0DkbBYN1k+mcz9erwA+MjWUzR+5LHgwbZ/CUNP8rlwSLzlXGxKnD0xrUHUg i7ttSxL9LGodPt4r+pc32rCTfVFwvm6q0yS6a8WuB8uWGltW0/ofxkBHYsAwARZx LkZIi3v8PM5G4ZuStQB0otNLudLmJXIkfmRp7vVgr8iOUNzMTT2Y/Li9zW2n9xcR YnghFoyhVUvxNSwhudMMN1IL47pyaCEVB9aVppsYtbheS//T5/I= =tGAO -----END PGP SIGNATURE----- --Apple-Mail=_540B1263-203B-43E9-BA92-ABF36413FD90--