From mboxrd@z Thu Jan 1 00:00:00 1970 From: Christoph Hellwig Date: Wed, 13 May 2020 08:26:20 +0200 Subject: [Ocfs2-devel] [PATCH 05/33] net: add sock_bindtoindex In-Reply-To: <20200513062649.2100053-1-hch@lst.de> References: <20200513062649.2100053-1-hch@lst.de> Message-ID: <20200513062649.2100053-6-hch@lst.de> List-Id: MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: "David S. Miller" , Jakub Kicinski Cc: Eric Dumazet , Alexey Kuznetsov , Hideaki YOSHIFUJI , Vlad Yasevich , Neil Horman , Marcelo Ricardo Leitner , Jon Maloy , Ying Xue , drbd-dev@lists.linbit.com, linux-block@vger.kernel.org, linux-kernel@vger.kernel.org, linux-rdma@vger.kernel.org, linux-nvme@lists.infradead.org, target-devel@vger.kernel.org, linux-afs@lists.infradead.org, linux-cifs@vger.kernel.org, cluster-devel@redhat.com, ocfs2-devel@oss.oracle.com, netdev@vger.kernel.org, linux-sctp@vger.kernel.org, ceph-devel@vger.kernel.org, rds-devel@oss.oracle.com, linux-nfs@vger.kernel.org Add a helper to directly set the SO_BINDTOIFINDEX sockopt from kernel space without going through a fake uaccess. Signed-off-by: Christoph Hellwig --- include/net/sock.h | 1 + net/core/sock.c | 21 +++++++++++++++------ net/ipv4/udp_tunnel.c | 4 +--- net/ipv6/ip6_udp_tunnel.c | 4 +--- 4 files changed, 18 insertions(+), 12 deletions(-) diff --git a/include/net/sock.h b/include/net/sock.h index 809596ffd32d2..b63ea15362065 100644 --- a/include/net/sock.h +++ b/include/net/sock.h @@ -2691,5 +2691,6 @@ void sock_set_reuseaddr(struct sock *sk, unsigned char reuse); void sock_set_linger(struct sock *sk, bool onoff, unsigned int linger); void sock_set_priority(struct sock *sk, u32 priority); void sock_set_sndtimeo(struct sock *sk, unsigned int secs); +int sock_bindtoindex(struct sock *sk, int ifindex); #endif /* _SOCK_H */ diff --git a/net/core/sock.c b/net/core/sock.c index 76527681e50b9..4b7439308caec 100644 --- a/net/core/sock.c +++ b/net/core/sock.c @@ -566,7 +566,7 @@ struct dst_entry *sk_dst_check(struct sock *sk, u32 cookie) } EXPORT_SYMBOL(sk_dst_check); -static int sock_setbindtodevice_locked(struct sock *sk, int ifindex) +static int sock_bindtoindex_locked(struct sock *sk, int ifindex) { int ret = -ENOPROTOOPT; #ifdef CONFIG_NETDEVICES @@ -594,6 +594,18 @@ static int sock_setbindtodevice_locked(struct sock *sk, int ifindex) return ret; } +int sock_bindtoindex(struct sock *sk, int ifindex) +{ + int ret; + + lock_sock(sk); + ret = sock_bindtoindex_locked(sk, ifindex); + release_sock(sk); + + return ret; +} +EXPORT_SYMBOL(sock_bindtoindex); + static int sock_setbindtodevice(struct sock *sk, char __user *optval, int optlen) { @@ -634,10 +646,7 @@ static int sock_setbindtodevice(struct sock *sk, char __user *optval, goto out; } - lock_sock(sk); - ret = sock_setbindtodevice_locked(sk, index); - release_sock(sk); - + return sock_bindtoindex(sk, index); out: #endif @@ -1221,7 +1230,7 @@ int sock_setsockopt(struct socket *sock, int level, int optname, break; case SO_BINDTOIFINDEX: - ret = sock_setbindtodevice_locked(sk, val); + ret = sock_bindtoindex_locked(sk, val); break; default: diff --git a/net/ipv4/udp_tunnel.c b/net/ipv4/udp_tunnel.c index 150e6f0fdbf59..2158e8bddf41c 100644 --- a/net/ipv4/udp_tunnel.c +++ b/net/ipv4/udp_tunnel.c @@ -22,9 +22,7 @@ int udp_sock_create4(struct net *net, struct udp_port_cfg *cfg, goto error; if (cfg->bind_ifindex) { - err = kernel_setsockopt(sock, SOL_SOCKET, SO_BINDTOIFINDEX, - (void *)&cfg->bind_ifindex, - sizeof(cfg->bind_ifindex)); + err = sock_bindtoindex(sock->sk, cfg->bind_ifindex); if (err < 0) goto error; } diff --git a/net/ipv6/ip6_udp_tunnel.c b/net/ipv6/ip6_udp_tunnel.c index 58956a6b66a21..6523609516d25 100644 --- a/net/ipv6/ip6_udp_tunnel.c +++ b/net/ipv6/ip6_udp_tunnel.c @@ -33,9 +33,7 @@ int udp_sock_create6(struct net *net, struct udp_port_cfg *cfg, goto error; } if (cfg->bind_ifindex) { - err = kernel_setsockopt(sock, SOL_SOCKET, SO_BINDTOIFINDEX, - (void *)&cfg->bind_ifindex, - sizeof(cfg->bind_ifindex)); + err = sock_bindtoindex(sock->sk, cfg->bind_ifindex); if (err < 0) goto error; } -- 2.26.2