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

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Date:   Tue, 29 Oct 2019 13:41:37 -0700
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: [PATCH 0/4] statx: expose the fs-verity bit

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(-)

-- 
2.24.0.rc1.363.gb1bccd3e3d-goog