[PATCH 23/33] ipv6: add ip6_sock_set_recverr
From: Christoph Hellwig <hch@lst.de>
Date: 2020-05-13 06:29:07
Also in:
ceph-devel, linux-block, linux-cifs, linux-nfs, linux-nvme, linux-rdma, linux-sctp, lkml, ocfs2-devel, target-devel
Subsystem:
networking [general], networking [ipv4/ipv6], rxrpc sockets (af_rxrpc), the rest · Maintainers:
"David S. Miller", Eric Dumazet, Jakub Kicinski, Paolo Abeni, David Ahern, Ido Schimmel, David Howells, Marc Dionne, Linus Torvalds
Add a helper to directly set the IPV6_RECVERR sockopt from kernel space without going through a fake uaccess. Signed-off-by: Christoph Hellwig <hch@lst.de> --- include/net/ipv6.h | 1 + net/ipv6/ipv6_sockglue.c | 10 ++++++++++ net/rxrpc/local_object.c | 10 ++-------- 3 files changed, 13 insertions(+), 8 deletions(-)
diff --git a/include/net/ipv6.h b/include/net/ipv6.h
index e24b59201a00d..69bc1651aaef8 100644
--- a/include/net/ipv6.h
+++ b/include/net/ipv6.h@@ -1176,5 +1176,6 @@ int ipv6_sock_mc_drop(struct sock *sk, int ifindex, const struct in6_addr *addr); int ip6_sock_set_v6only(struct sock *sk, bool val); +void ip6_sock_set_recverr(struct sock *sk, bool val); #endif /* _NET_IPV6_H */
diff --git a/net/ipv6/ipv6_sockglue.c b/net/ipv6/ipv6_sockglue.c
index f26224bb3e098..3c67626b6f5a9 100644
--- a/net/ipv6/ipv6_sockglue.c
+++ b/net/ipv6/ipv6_sockglue.c@@ -147,6 +147,16 @@ int ip6_sock_set_v6only(struct sock *sk, bool val) } EXPORT_SYMBOL(ip6_sock_set_v6only); +void ip6_sock_set_recverr(struct sock *sk, bool val) +{ + lock_sock(sk); + inet6_sk(sk)->recverr = val; + if (!val) + skb_queue_purge(&sk->sk_error_queue); + release_sock(sk); +} +EXPORT_SYMBOL(ip6_sock_set_recverr); + static int do_ipv6_setsockopt(struct sock *sk, int level, int optname, char __user *optval, unsigned int optlen) {
diff --git a/net/rxrpc/local_object.c b/net/rxrpc/local_object.c
index 20236ddecd2ef..5e356a63aa791 100644
--- a/net/rxrpc/local_object.c
+++ b/net/rxrpc/local_object.c@@ -107,7 +107,7 @@ static struct rxrpc_local *rxrpc_alloc_local(struct rxrpc_net *rxnet, static int rxrpc_open_socket(struct rxrpc_local *local, struct net *net) { struct sock *usk; - int ret, opt; + int ret; _enter("%p{%d,%d}", local, local->srx.transport_type, local->srx.transport.family);
@@ -157,13 +157,7 @@ static int rxrpc_open_socket(struct rxrpc_local *local, struct net *net) switch (local->srx.transport.family) { case AF_INET6: /* we want to receive ICMPv6 errors */ - opt = 1; - ret = kernel_setsockopt(local->socket, SOL_IPV6, IPV6_RECVERR, - (char *) &opt, sizeof(opt)); - if (ret < 0) { - _debug("setsockopt failed"); - goto error; - } + ip6_sock_set_recverr(local->socket->sk, true); /* Fall through and set IPv4 options too otherwise we don't get * errors from IPv4 packets sent through the IPv6 socket.
--
2.26.2