From: Eric Biggers <ebiggers@kernel.org>
To: linux-fscrypt@vger.kernel.org
Cc: linux-fsdevel@vger.kernel.org, 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: [PATCH 1/4] statx: define STATX_ATTR_VERITY
Date: Tue, 29 Oct 2019 13:41:38 -0700 [thread overview]
Message-ID: <20191029204141.145309-2-ebiggers@kernel.org> (raw)
In-Reply-To: <20191029204141.145309-1-ebiggers@kernel.org>
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>
---
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
next prev parent reply other threads:[~2019-10-29 20:44 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 ` Eric Biggers [this message]
2019-10-30 18:26 ` [PATCH 1/4] statx: define STATX_ATTR_VERITY Andreas Dilger
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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