From mboxrd@z Thu Jan 1 00:00:00 1970 From: Eric Biggers Subject: [PATCH 1/4] statx: define STATX_ATTR_VERITY Date: Tue, 29 Oct 2019 13:41:38 -0700 Message-ID: <20191029204141.145309-2-ebiggers@kernel.org> References: <20191029204141.145309-1-ebiggers@kernel.org> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <20191029204141.145309-1-ebiggers@kernel.org> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: linux-f2fs-devel-bounces@lists.sourceforge.net To: linux-fscrypt@vger.kernel.org Cc: Theodore Ts'o , linux-api@vger.kernel.org, linux-f2fs-devel@lists.sourceforge.net, David Howells , linux-fsdevel@vger.kernel.org, Jaegeuk Kim , linux-ext4@vger.kernel.org, Victor Hsieh List-Id: linux-api@vger.kernel.org From: Eric Biggers 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 --- 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