[PATCH 0/3] io_uring op probing fixes

[Gabriel Krisman Bertazi <krisman@suse.de>]

Hi Jens,

I didn't know this interface existed until today, when I started looking
at creating exactly this feature.  My goal is to know which operation
supports which modes (registered buffers, bundled writes, iopoll).  Now
that I know it exists, I might just expose the extra information through
io_uring_probe_op->flags, instead of adding a new operation. What do you
think?

Anyway, this patchset is not implementing that.  Patch 1 fixes an issue
with the existing interface. Patches 2 and 3 are small cleanups to the
same path, since I was already looking at it.

I tested it with a !CONFIG_NET kernel to have some disabled operations.
It also survived the liburing testsuite.

Gabriel Krisman Bertazi (3):
  io_uring: Fix probe of disabled operations
  io_uring: Allocate only necessary memory in io_probe
  io_uring: Don't read userspace data in io_probe

 io_uring/opdef.c    |  8 ++++++++
 io_uring/opdef.h    |  4 ++--
 io_uring/register.c | 20 +++++---------------
 3 files changed, 15 insertions(+), 17 deletions(-)

-- 
2.45.2