[PATCH net-next v2 0/2] vsock: SO_INQ for stream sockets

This is the follow-up announced in the receive queue hint series [1]:
SO_INQ and SCM_INQ for AF_VSOCK stream sockets, as AF_UNIX has.

The value is the one SIOCINQ returns, so on Hyper-V it covers the
current packet only. Accepted sockets inherit the flag from the
listener, and the sockmap receive path does not report it.

Tested over loopback with vsock_test and vsock_uring_test.

v2:
 - move the SOL_SOCKET options to vsock_sol_socket_setsockopt(),
   with vsock_custom_sockopt() and a switch on optname (Stefano)
 - accepted sockets inherit SO_INQ from the listener, as TCP_INQ
   does (Stefano)
 - use || instead of | in recvmsg (Stefano)
 - test: check MSG_CTRUNC and the SCM_INQ cmsg length (Stefano)
 - test: cover inheritance by accepted sockets

v1: https://lore.kernel.org/netdev/20261012235524.41468-1-devnexen@gmail.com/ (local)

[1] https://lore.kernel.org/netdev/20260923184008.153541-1-devnexen@gmail.com/ (local)

David Carlier (2):
  vsock: support SO_INQ on stream sockets
  vsock/test: cover SO_INQ

 include/net/af_vsock.h           |   1 +
 net/vmw_vsock/af_vsock.c         | 111 ++++++++----
 tools/testing/vsock/vsock_test.c | 279 +++++++++++++++++++++++++++++++
 3 files changed, 363 insertions(+), 28 deletions(-)


base-commit: a4057f51efc2b74ddf46721e83f45e9efb13649d
-- 
2.55.0