[PATCH v4 0/6] io_uring: add mkdirat support

[Dmitry Kadashev <dkadashev@gmail.com>]

This adds mkdirat support to io_uring and is heavily based on recently
added renameat() / unlinkat() support.

The first patch is preparation with no functional changes, makes
do_mkdirat accept struct filename pointer rather than the user string.

The second one leverages that to implement mkdirat in io_uring.

The rest of the patches just convert other similar do_* functions in
namei.c to accept struct filename, for uniformity with do_mkdirat,
do_renameat and do_unlinkat. No functional changes there.

Based on io_uring-5.13.

v4:
- update do_mknodat, do_symlinkat and do_linkat to accept struct
  filename for uniformity with do_mkdirat, do_renameat and do_unlinkat;

v3:
- rebase;

v2:
- do not mess with struct filename's refcount in do_mkdirat, instead add
  and use __filename_create() that does not drop the name on success;

Dmitry Kadashev (6):
  fs: make do_mkdirat() take struct filename
  io_uring: add support for IORING_OP_MKDIRAT
  fs: make do_mknodat() take struct filename
  fs: make do_symlinkat() take struct filename
  namei: add getname_uflags()
  fs: make do_linkat() take struct filename

 fs/exec.c                     |   8 +-
 fs/internal.h                 |   1 +
 fs/io_uring.c                 |  55 ++++++++++++++
 fs/namei.c                    | 135 +++++++++++++++++++++++-----------
 include/linux/fs.h            |   1 +
 include/uapi/linux/io_uring.h |   1 +
 6 files changed, 152 insertions(+), 49 deletions(-)

-- 
2.30.2