[PATCH v4 0/3] Introduce getsockname io_uring_cmd

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

Since V3:
  - Fix passing of 'peer' in io_uring side.
Since V2:
  - Move sockaddr_storage to do_sockname
Since V1:
  - minor style fixes
  - Resend with (more) maintainers cc'ed
  - rebased to axboe/for-next.
--

This feature has been requested a few times in the liburing repository
and Discord channels, such as in [1,2].  If anything, it also helps
solve a long standing issue in the bind-listen test that results in
occasional test failures.

The patchset is divided in three parts: Patch 1 merges the getpeername
and getsockname implementation in the network layer, making further
patches easier; Patch 2 splits out a helper used by io_uring, like done
for other network commands; Finally, patch 3 plumbs the new command in
io_uring.

The syscall path was tested by booting a Linux distro, which does all
sorts of getsockname/getpeername syscalls.  The io_uring side was tested
with a couple of new liburing subtests available at:

   https://github.com/krisman/liburing.git -b socket

Based on top of Jens' for-next.

[1] https://github.com/axboe/liburing/issues/1356
[2] https://discord.com/channels/1241076672589991966/1241076672589991970/1429975797912830074



CC: netdev@vger.kernel.org
CC: io-uring@vger.kernel.org
CC: Jakub Kicinski <kuba@kernel.org>
CC: David S. Miller <davem@davemloft.net>
CC: Eric Dumazet <edumazet@google.com>
CC: Kuniyuki Iwashima <kuniyu@google.com>
CC: Paolo Abeni <pabeni@redhat.com>
CC: Willem de Bruijn <willemb@google.com>
CC: Simon Horman <horms@kernel.org>
Base: axboe/for-next

Gabriel Krisman Bertazi (3):
  socket: Unify getsockname and getpeername implementation
  socket: Split out a getsockname helper for io_uring
  io_uring: Introduce getsockname io_uring cmd

 include/linux/socket.h        |  6 ++--
 include/uapi/linux/io_uring.h |  1 +
 io_uring/cmd_net.c            | 22 ++++++++++++
 net/compat.c                  |  4 +--
 net/socket.c                  | 67 +++++++++++------------------------
 5 files changed, 49 insertions(+), 51 deletions(-)

-- 
2.51.0