netdev - Re: [PATCH v1 net-next 02/14] udplite: Retire UDP-Lite for IPv6.

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Date: Tue, 30 May 2023 10:49:08 -0700
From: Kuniyuki Iwashima <kuniyu@...zon.com>
To: <simon.horman@...igine.com>
CC: <davem@...emloft.net>, <dsahern@...nel.org>, <edumazet@...gle.com>,
	<kuba@...nel.org>, <kuni1840@...il.com>, <kuniyu@...zon.com>,
	<netdev@...r.kernel.org>, <pabeni@...hat.com>,
	<willemdebruijn.kernel@...il.com>
Subject: Re: [PATCH v1 net-next 02/14] udplite: Retire UDP-Lite for IPv6.

From: Simon Horman <simon.horman@...igine.com>
Date: Tue, 30 May 2023 15:01:11 +0200
> On Mon, May 29, 2023 at 06:03:36PM -0700, Kuniyuki Iwashima wrote:
> > We no longer support IPPROTO_UDPLITE for AF_INET6.
> > 
> > This commit removes udplite.c and udp_impl.h under net/ipv6 and makes
> > some functions static that UDP shared.
> > 
> > Note that udplite.h is included in udp.c temporarily not to introduce
> > breakage, but we will remove it later with dead code.
> > 
> > Signed-off-by: Kuniyuki Iwashima <kuniyu@...zon.com>
> 
> ...
> 
> > diff --git a/net/ipv6/udp_impl.h b/net/ipv6/udp_impl.h
> > deleted file mode 100644
> > index 0590f566379d..000000000000
> > --- a/net/ipv6/udp_impl.h
> > +++ /dev/null
> > @@ -1,31 +0,0 @@
> > -/* SPDX-License-Identifier: GPL-2.0 */
> > -#ifndef _UDP6_IMPL_H
> > -#define _UDP6_IMPL_H
> > -#include <net/udp.h>
> > -#include <net/udplite.h>
> > -#include <net/protocol.h>
> > -#include <net/addrconf.h>
> > -#include <net/inet_common.h>
> > -#include <net/transp_v6.h>
> > -
> > -int __udp6_lib_rcv(struct sk_buff *, struct udp_table *, int);
> > -int __udp6_lib_err(struct sk_buff *, struct inet6_skb_parm *, u8, u8, int,
> > -		   __be32, struct udp_table *);
> > -
> > -int udpv6_init_sock(struct sock *sk);
> > -int udp_v6_get_port(struct sock *sk, unsigned short snum);
> > -void udp_v6_rehash(struct sock *sk);
> > -
> > -int udpv6_getsockopt(struct sock *sk, int level, int optname,
> > -		     char __user *optval, int __user *optlen);
> > -int udpv6_setsockopt(struct sock *sk, int level, int optname, sockptr_t optval,
> > -		     unsigned int optlen);
> > -int udpv6_sendmsg(struct sock *sk, struct msghdr *msg, size_t len);
> > -int udpv6_recvmsg(struct sock *sk, struct msghdr *msg, size_t len, int flags,
> > -		  int *addr_len);
> 
> clang-16 with W=1 complains that:
> 
>  +net/ipv6/udp.c:341:5: warning: no previous prototype for 'udpv6_recvmsg' [-Wmissing-prototypes]
>  +  341 | int udpv6_recvmsg(struct sock *sk, struct msghdr *msg, size_t len,
>  +      |     ^~~~~~~~~~~~~
>  +net/ipv6/udp.c:1335:5: warning: no previous prototype for 'udpv6_sendmsg' [-Wmissing-prototypes]
>  + 1335 | int udpv6_sendmsg(struct sock *sk, struct msghdr *msg, size_t len)
>  +      |     ^~~~~~~~~~~~~
> 
> Likewise it has similar complains about ipv4 in a subsequent patch.

Good catch!

This series survived allmodconfig and allyesconfig with gcc, but I
didn't add W=1.

Will fix it, thanks!


> 
> > -void udpv6_destroy_sock(struct sock *sk);
> > -
> > -#ifdef CONFIG_PROC_FS
> > -int udp6_seq_show(struct seq_file *seq, void *v);
> > -#endif
> > -#endif	/* _UDP6_IMPL_H */