af_unix: Remove sock->state assignment.

Both struct socket and struct sock have a variable to
manage its state, sock->state and sk->sk_state.

When both are used, the former typically manages syscall
state and the latter manages the actual connection state.

AF_UNIX only uses sk->sk_state.

Let's remove unnecessary assignemnts for sock->state.

Signed-off-by: Kuniyuki Iwashima <kuniyu@google.com>
Link: https://patch.msgid.link/20260529191829.3864438-1-kuniyu@google.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

Author: q2ven

net/unix/af_unix.c

@@ -1142,8 +1142,6 @@ static int unix_create(struct net *net, struct socket *sock, int protocol,
 	if (protocol && protocol != PF_UNIX)
 		return -EPROTONOSUPPORT;
 
-	sock->state = SS_UNCONNECTED;
-
 	switch (sock->type) {
 	case SOCK_STREAM:
 		set_bit(SOCK_CUSTOM_SOCKOPT, &sock->flags);
@@ -1775,7 +1773,6 @@ static int unix_stream_connect(struct socket *sock, struct sockaddr_unsized *uad
 	/* Set credentials */
 	copy_peercred(sk, other);
 
-	sock->state	= SS_CONNECTED;
 	WRITE_ONCE(sk->sk_state, TCP_ESTABLISHED);
 	sock_hold(newsk);
 
@@ -1831,8 +1828,7 @@ static int unix_socketpair(struct socket *socka, struct socket *sockb)
 
 	ska->sk_state = TCP_ESTABLISHED;
 	skb->sk_state = TCP_ESTABLISHED;
-	socka->state  = SS_CONNECTED;
-	sockb->state  = SS_CONNECTED;
+
 	return 0;
 }
 
@@ -1874,7 +1870,6 @@ static int unix_accept(struct socket *sock, struct socket *newsock,
 	/* attach accepted sock to socket */
 	unix_state_lock(tsk);
 	unix_update_edges(unix_sk(tsk));
-	newsock->state = SS_CONNECTED;
 	sock_graft(tsk, newsock);
 	unix_state_unlock(tsk);
 	return 0;