Re: [PATCH net-next v6 1/4] net: af_unix: enable custom setsockopt for all socket types

On Sun, Aug 2, 2026 at 8:11 AM Jori Koolstra [off-list ref] wrote:

unix_setsockopt() and the SOCK_CUSTOM_SOCKOPT flag were only wired up
for SOCK_STREAM (introduced along with the stream-only SO_INQ).
Consequently custom AF_UNIX options are unreachable on SOCK_DGRAM and
SOCK_SEQPACKET: those setsockopt() calls bypass unix_setsockopt() and
fall through to the generic sock_setsockopt(), failing with
-ENOPROTOOPT.

Set SOCK_CUSTOM_SOCKOPT for every AF_UNIX socket type in unix_create(), and
also for accepted sockets in unix_accept() (reachable for stream and
seqpacket).

This is a prerequisite for making SO_RIGHTS_NOTRUNC settable on all AF_UNIX
socket types.

Signed-off-by: Jori Koolstra <jkoolstra@xs4all.nl>

Reviewed-by: Kuniyuki Iwashima <kuniyu@google.com>