[PATCHv2 0/5] direct-io file extended attributes

[Keith Busch <kbusch@meta.com>]

From: Keith Busch <kbusch@kernel.org>

The attributes reported through statx are incomplete for applications to
fully know exactly how IO construction is valid or not. The statx call
can report minimum memory alignment and total granularity, but it
doesn't show the underlying gap boundary requirements or max segments
per granule.

This series adds the minimum to the extended file attributes through
file_getattr. I hear this is the preferred interface for reporting such
things over adding more fields to statx. In order to get everything
under a single syscall, some of the attributes are duplicated from
statx.

Keith Busch (5):
  fs: add direct io attributes to file_getattr
  block: report direct io attributes through file_getattr
  xfs: report direct io attributes through file_getattr
  ext4: report direct io attributes through file_getattr
  f2fs: report direct io attributes through file_getattr

 block/bdev.c             | 37 +++++++++++++++++++++++++++++++++++++
 fs/ext4/ioctl.c          | 23 +++++++++++++++++++++++
 fs/f2fs/file.c           | 20 ++++++++++++++++++++
 fs/file_attr.c           | 13 ++++++++++++-
 fs/xfs/xfs_ioctl.c       | 26 ++++++++++++++++++++++++++
 include/linux/blkdev.h   | 14 ++++++++++++++
 include/linux/fileattr.h | 10 ++++++++--
 include/uapi/linux/fs.h  | 10 +++++++++-
 8 files changed, 149 insertions(+), 4 deletions(-)

-- 
2.53.0-Meta