[PATCHES][RFC] statx-related stuff

[Al Viro <viro@zeniv.linux.org.uk>]

Assorted statx-related stuff; I hoped there would be more of that, but
the things got stalled.

Currently in there:
	* partial untangling of io_uring interactions (separating
the damn LOOKUP_EMPTY from the rest of flags, at least)
	* struct fd converions in the area (separated from #work.fd
to reduce conflicts)
	* getting rid of AT_GETATTR_NOSEC [Stefan Berger]; depending
upon the desired semantics for LSM shite around ->getattr() we might
want to pass some kind of flag to instances, but in the current form
it's been completely pointless - all calls ended up with that thing
passed to them.
	* getting rid of pointless empty_dir_getattr() - it's used
only as ->getattr() instance and it had been an equivalent of what
we do with NULL ->getattr all along.

Branch is on top of viro/vfs.git#base.getname-fixed; it lives in
git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs.git #work.statx2
individual patches in followups.

Shortlog:
Al Viro (4):
      io_statx_prep(): use getname_uflags()
      kill getname_statx_lookup_flags()
      fs/stat.c: switch to CLASS(fd_raw)
      libfs: kill empty_dir_getattr()

Stefan Berger (1):
      fs: Simplify getattr interface function checking AT_GETATTR_NOSEC flag

Diffstat:
 fs/ecryptfs/inode.c        | 12 ++----------
 fs/internal.h              |  1 -
 fs/libfs.c                 | 11 -----------
 fs/overlayfs/inode.c       | 10 +++++-----
 fs/overlayfs/overlayfs.h   |  8 --------
 fs/stat.c                  | 24 +++++++-----------------
 include/uapi/linux/fcntl.h |  4 ----
 io_uring/statx.c           |  3 +--
 8 files changed, 15 insertions(+), 58 deletions(-)