On Tue, Oct 29, 2019 at 01:41:37PM -0700, Eric Biggers wrote:

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(-)

Applied to fscrypt.git#fsverity for 5.5.

- Eric