sctp: Remove sctp_pf.create_accept_sk().

sctp_v[46]_create_accept_sk() are no longer used.

Let's remove sctp_pf.create_accept_sk().

Signed-off-by: Kuniyuki Iwashima <[e-mail]>
Acked-by: Xin Long <[e-mail]>
Link: https://patch.msgid.link/[e-mail]
Signed-off-by: Jakub Kicinski <[e-mail]>

include/net/sctp/structs.h

···
 	int  (*bind_verify) (struct sctp_sock *, union sctp_addr *);
 	int  (*send_verify) (struct sctp_sock *, union sctp_addr *);
 	int  (*supported_addrs)(const struct sctp_sock *, __be16 *);
-	struct sock *(*create_accept_sk) (struct sock *sk,
-					  struct sctp_association *asoc,
-					  bool kern);
 	int (*addr_to_user)(struct sctp_sock *sk, union sctp_addr *addr);
 	void (*to_sk_saddr)(union sctp_addr *, struct sock *sk);
 	void (*to_sk_daddr)(union sctp_addr *, struct sock *sk);

net/sctp/ipv6.c

···
 	return retval;
 }
 
-/* Create and initialize a new sk for the socket to be returned by accept(). */
-static struct sock *sctp_v6_create_accept_sk(struct sock *sk,
-					     struct sctp_association *asoc,
-					     bool kern)
-{
-	struct ipv6_pinfo *newnp, *np = inet6_sk(sk);
-	struct sctp6_sock *newsctp6sk;
-	struct inet_sock *newinet;
-	struct sock *newsk;
-
-	newsk = sk_alloc(sock_net(sk), PF_INET6, GFP_KERNEL, sk->sk_prot, kern);
-	if (!newsk)
-		return NULL;
-
-	sock_init_data(NULL, newsk);
-
-	sctp_copy_sock(newsk, sk, asoc);
-	sock_reset_flag(sk, SOCK_ZAPPED);
-
-	newsctp6sk = (struct sctp6_sock *)newsk;
-	newinet = inet_sk(newsk);
-	newinet->pinet6 = &newsctp6sk->inet6;
-	newinet->ipv6_fl_list = NULL;
-
-	sctp_sk(newsk)->v4mapped = sctp_sk(sk)->v4mapped;
-
-	newnp = inet6_sk(newsk);
-
-	memcpy(newnp, np, sizeof(struct ipv6_pinfo));
-	newnp->ipv6_mc_list = NULL;
-	newnp->ipv6_ac_list = NULL;
-
-	sctp_v6_copy_ip_options(sk, newsk);
-
-	/* Initialize sk's sport, dport, rcv_saddr and daddr for getsockname()
-	 * and getpeername().
-	 */
-	sctp_v6_to_sk_daddr(&asoc->peer.primary_addr, newsk);
-
-	newsk->sk_v6_rcv_saddr = sk->sk_v6_rcv_saddr;
-
-	return newsk;
-}
-
 /* Format a sockaddr for return to user space. This makes sure the return is
  * AF_INET or AF_INET6 depending on the SCTP_I_WANT_MAPPED_V4_ADDR option.
  */
···
 	.bind_verify   = sctp_inet6_bind_verify,
 	.send_verify   = sctp_inet6_send_verify,
 	.supported_addrs = sctp_inet6_supported_addrs,
-	.create_accept_sk = sctp_v6_create_accept_sk,
 	.addr_to_user  = sctp_v6_addr_to_user,
 	.to_sk_saddr   = sctp_v6_to_sk_saddr,
 	.to_sk_daddr   = sctp_v6_to_sk_daddr,

net/sctp/protocol.c

···
 	return INET_ECN_is_ce(ip_hdr(skb)->tos);
 }
 
-/* Create and initialize a new sk for the socket returned by accept(). */
-static struct sock *sctp_v4_create_accept_sk(struct sock *sk,
-					     struct sctp_association *asoc,
-					     bool kern)
-{
-	struct sock *newsk = sk_alloc(sock_net(sk), PF_INET, GFP_KERNEL,
-			sk->sk_prot, kern);
-	struct inet_sock *newinet;
-
-	if (!newsk)
-		return NULL;
-
-	sock_init_data(NULL, newsk);
-
-	sctp_copy_sock(newsk, sk, asoc);
-	sock_reset_flag(newsk, SOCK_ZAPPED);
-
-	sctp_v4_copy_ip_options(sk, newsk);
-
-	newinet = inet_sk(newsk);
-
-	newinet->inet_daddr = asoc->peer.primary_addr.v4.sin_addr.s_addr;
-
-	return newsk;
-}
-
 static int sctp_v4_addr_to_user(struct sctp_sock *sp, union sctp_addr *addr)
 {
 	/* No address mapping for V4 sockets */
···
 	.bind_verify   = sctp_inet_bind_verify,
 	.send_verify   = sctp_inet_send_verify,
 	.supported_addrs = sctp_inet_supported_addrs,
-	.create_accept_sk = sctp_v4_create_accept_sk,
 	.addr_to_user  = sctp_v4_addr_to_user,
 	.to_sk_saddr   = sctp_v4_to_sk_saddr,
 	.to_sk_daddr   = sctp_v4_to_sk_daddr,