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Date: Fri, 17 Jul 2020 11:26:34 +0200
From: Stefan Schmidt <stefan@...enfreihafen.org>
To: Christoph Hellwig <hch@....de>,
"David S. Miller" <davem@...emloft.net>
Cc: Alexei Starovoitov <ast@...nel.org>,
Daniel Borkmann <daniel@...earbox.net>,
Chas Williams <3chas3@...il.com>,
Pablo Neira Ayuso <pablo@...filter.org>,
Jozsef Kadlecsik <kadlec@...filter.org>,
Florian Westphal <fw@...len.de>,
Alexey Kuznetsov <kuznet@....inr.ac.ru>,
Hideaki YOSHIFUJI <yoshfuji@...ux-ipv6.org>,
linux-kernel@...r.kernel.org, netdev@...r.kernel.org,
bpf@...r.kernel.org, netfilter-devel@...r.kernel.org,
linux-sctp@...r.kernel.org, linux-arch@...r.kernel.org,
linux-bluetooth@...r.kernel.org, bridge@...ts.linux-foundation.org,
linux-can@...r.kernel.org, dccp@...r.kernel.org,
linux-wpan@...r.kernel.org, mptcp@...ts.01.org
Subject: Re: [PATCH 05/22] net: remove compat_sock_common_{get,set}sockopt
Hello.
On 17.07.20 08:23, Christoph Hellwig wrote:
> Add the compat handling to sock_common_{get,set}sockopt instead,
> keyed of in_compat_syscall(). This allow to remove the now unused
> ->compat_{get,set}sockopt methods from struct proto_ops.
>
> Signed-off-by: Christoph Hellwig <hch@....de>
> ---
> include/linux/net.h | 6 ------
> include/net/sock.h | 4 ----
> net/core/sock.c | 30 ++++++------------------------
> net/dccp/ipv4.c | 4 ----
> net/dccp/ipv6.c | 2 --
> net/ieee802154/socket.c | 8 --------
> net/ipv4/af_inet.c | 6 ------
> net/ipv6/af_inet6.c | 4 ----
> net/ipv6/ipv6_sockglue.c | 12 ++----------
> net/ipv6/raw.c | 2 --
> net/l2tp/l2tp_ip.c | 4 ----
> net/l2tp/l2tp_ip6.c | 2 --
> net/mptcp/protocol.c | 6 ------
> net/phonet/socket.c | 8 --------
> net/sctp/ipv6.c | 2 --
> net/sctp/protocol.c | 4 ----
> 16 files changed, 8 insertions(+), 96 deletions(-)
>
> diff --git a/include/linux/net.h b/include/linux/net.h
> index 016a9c5faa3479..858ff1d981540d 100644
> --- a/include/linux/net.h
> +++ b/include/linux/net.h
> @@ -165,12 +165,6 @@ struct proto_ops {
> int optname, char __user *optval, unsigned int optlen);
> int (*getsockopt)(struct socket *sock, int level,
> int optname, char __user *optval, int __user *optlen);
> -#ifdef CONFIG_COMPAT
> - int (*compat_setsockopt)(struct socket *sock, int level,
> - int optname, char __user *optval, unsigned int optlen);
> - int (*compat_getsockopt)(struct socket *sock, int level,
> - int optname, char __user *optval, int __user *optlen);
> -#endif
> void (*show_fdinfo)(struct seq_file *m, struct socket *sock);
> int (*sendmsg) (struct socket *sock, struct msghdr *m,
> size_t total_len);
> diff --git a/include/net/sock.h b/include/net/sock.h
> index 4bf8841651486d..1fd7cf5fc7516c 100644
> --- a/include/net/sock.h
> +++ b/include/net/sock.h
> @@ -1744,10 +1744,6 @@ int sock_common_recvmsg(struct socket *sock, struct msghdr *msg, size_t size,
> int flags);
> int sock_common_setsockopt(struct socket *sock, int level, int optname,
> char __user *optval, unsigned int optlen);
> -int compat_sock_common_getsockopt(struct socket *sock, int level,
> - int optname, char __user *optval, int __user *optlen);
> -int compat_sock_common_setsockopt(struct socket *sock, int level,
> - int optname, char __user *optval, unsigned int optlen);
>
> void sk_common_release(struct sock *sk);
>
> diff --git a/net/core/sock.c b/net/core/sock.c
> index e085df79482520..018404d1762682 100644
> --- a/net/core/sock.c
> +++ b/net/core/sock.c
> @@ -3199,23 +3199,14 @@ int sock_common_getsockopt(struct socket *sock, int level, int optname,
> {
> struct sock *sk = sock->sk;
>
> - return sk->sk_prot->getsockopt(sk, level, optname, optval, optlen);
> -}
> -EXPORT_SYMBOL(sock_common_getsockopt);
> -
> #ifdef CONFIG_COMPAT
> -int compat_sock_common_getsockopt(struct socket *sock, int level, int optname,
> - char __user *optval, int __user *optlen)
> -{
> - struct sock *sk = sock->sk;
> -
> - if (sk->sk_prot->compat_getsockopt != NULL)
> + if (in_compat_syscal() && sk->sk_prot->compat_getsockopt)
> return sk->sk_prot->compat_getsockopt(sk, level, optname,
> optval, optlen);
> +#endif
> return sk->sk_prot->getsockopt(sk, level, optname, optval, optlen);
> }
> -EXPORT_SYMBOL(compat_sock_common_getsockopt);
> -#endif
> +EXPORT_SYMBOL(sock_common_getsockopt);
>
> int sock_common_recvmsg(struct socket *sock, struct msghdr *msg, size_t size,
> int flags)
> @@ -3240,23 +3231,14 @@ int sock_common_setsockopt(struct socket *sock, int level, int optname,
> {
> struct sock *sk = sock->sk;
>
> - return sk->sk_prot->setsockopt(sk, level, optname, optval, optlen);
> -}
> -EXPORT_SYMBOL(sock_common_setsockopt);
> -
> #ifdef CONFIG_COMPAT
> -int compat_sock_common_setsockopt(struct socket *sock, int level, int optname,
> - char __user *optval, unsigned int optlen)
> -{
> - struct sock *sk = sock->sk;
> -
> - if (sk->sk_prot->compat_setsockopt != NULL)
> + if (in_compat_syscall() && sk->sk_prot->compat_setsockopt)
> return sk->sk_prot->compat_setsockopt(sk, level, optname,
> optval, optlen);
> +#endif
> return sk->sk_prot->setsockopt(sk, level, optname, optval, optlen);
> }
> -EXPORT_SYMBOL(compat_sock_common_setsockopt);
> -#endif
> +EXPORT_SYMBOL(sock_common_setsockopt);
>
> void sk_common_release(struct sock *sk)
> {
> diff --git a/net/dccp/ipv4.c b/net/dccp/ipv4.c
> index a7e989919c5307..316cc5ac0da72b 100644
> --- a/net/dccp/ipv4.c
> +++ b/net/dccp/ipv4.c
> @@ -999,10 +999,6 @@ static const struct proto_ops inet_dccp_ops = {
> .recvmsg = sock_common_recvmsg,
> .mmap = sock_no_mmap,
> .sendpage = sock_no_sendpage,
> -#ifdef CONFIG_COMPAT
> - .compat_setsockopt = compat_sock_common_setsockopt,
> - .compat_getsockopt = compat_sock_common_getsockopt,
> -#endif
> };
>
> static struct inet_protosw dccp_v4_protosw = {
> diff --git a/net/dccp/ipv6.c b/net/dccp/ipv6.c
> index 650187d688519c..b50f85a72cd5fc 100644
> --- a/net/dccp/ipv6.c
> +++ b/net/dccp/ipv6.c
> @@ -1083,8 +1083,6 @@ static const struct proto_ops inet6_dccp_ops = {
> .sendpage = sock_no_sendpage,
> #ifdef CONFIG_COMPAT
> .compat_ioctl = inet6_compat_ioctl,
> - .compat_setsockopt = compat_sock_common_setsockopt,
> - .compat_getsockopt = compat_sock_common_getsockopt,
> #endif
> };
>
> diff --git a/net/ieee802154/socket.c b/net/ieee802154/socket.c
> index d93d4531aa9bc5..94ae9662133e30 100644
> --- a/net/ieee802154/socket.c
> +++ b/net/ieee802154/socket.c
> @@ -423,10 +423,6 @@ static const struct proto_ops ieee802154_raw_ops = {
> .recvmsg = sock_common_recvmsg,
> .mmap = sock_no_mmap,
> .sendpage = sock_no_sendpage,
> -#ifdef CONFIG_COMPAT
> - .compat_setsockopt = compat_sock_common_setsockopt,
> - .compat_getsockopt = compat_sock_common_getsockopt,
> -#endif
> };
>
> /* DGRAM Sockets (802.15.4 dataframes) */
> @@ -986,10 +982,6 @@ static const struct proto_ops ieee802154_dgram_ops = {
> .recvmsg = sock_common_recvmsg,
> .mmap = sock_no_mmap,
> .sendpage = sock_no_sendpage,
> -#ifdef CONFIG_COMPAT
> - .compat_setsockopt = compat_sock_common_setsockopt,
> - .compat_getsockopt = compat_sock_common_getsockopt,
> -#endif
For the ieee802154 part:
Acked-by: Stefan Schmidt <stefan@...enfreihafen.org>
regards
Stefan Schmidt
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