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Message-Id: <20200513062649.2100053-21-hch@lst.de>
Date: Wed, 13 May 2020 08:26:35 +0200
From: Christoph Hellwig <hch@....de>
To: "David S. Miller" <davem@...emloft.net>,
Jakub Kicinski <kuba@...nel.org>
Cc: Eric Dumazet <edumazet@...gle.com>,
Alexey Kuznetsov <kuznet@....inr.ac.ru>,
Hideaki YOSHIFUJI <yoshfuji@...ux-ipv6.org>,
Vlad Yasevich <vyasevich@...il.com>,
Neil Horman <nhorman@...driver.com>,
Marcelo Ricardo Leitner <marcelo.leitner@...il.com>,
Jon Maloy <jmaloy@...hat.com>,
Ying Xue <ying.xue@...driver.com>, drbd-dev@...ts.linbit.com,
linux-block@...r.kernel.org, linux-kernel@...r.kernel.org,
linux-rdma@...r.kernel.org, linux-nvme@...ts.infradead.org,
target-devel@...r.kernel.org, linux-afs@...ts.infradead.org,
linux-cifs@...r.kernel.org, cluster-devel@...hat.com,
ocfs2-devel@....oracle.com, netdev@...r.kernel.org,
linux-sctp@...r.kernel.org, ceph-devel@...r.kernel.org,
rds-devel@....oracle.com, linux-nfs@...r.kernel.org
Subject: [PATCH 20/33] ipv4: add ip_sock_set_recverr
Add a helper to directly set the IP_RECVERR sockopt from kernel space
without going through a fake uaccess.
Signed-off-by: Christoph Hellwig <hch@....de>
---
include/net/ip.h | 1 +
net/ipv4/ip_sockglue.c | 10 ++++++++++
net/rxrpc/local_object.c | 8 +-------
3 files changed, 12 insertions(+), 7 deletions(-)
diff --git a/include/net/ip.h b/include/net/ip.h
index 1e2feca8630d0..7ab8140b54429 100644
--- a/include/net/ip.h
+++ b/include/net/ip.h
@@ -767,5 +767,6 @@ static inline bool inetdev_valid_mtu(unsigned int mtu)
void ip_sock_set_tos(struct sock *sk, int val);
void ip_sock_set_freebind(struct sock *sk, bool val);
+void ip_sock_set_recverr(struct sock *sk, bool val);
#endif /* _IP_H */
diff --git a/net/ipv4/ip_sockglue.c b/net/ipv4/ip_sockglue.c
index 0c40887a817f8..9abecc3195520 100644
--- a/net/ipv4/ip_sockglue.c
+++ b/net/ipv4/ip_sockglue.c
@@ -589,6 +589,16 @@ void ip_sock_set_freebind(struct sock *sk, bool val)
}
EXPORT_SYMBOL(ip_sock_set_freebind);
+void ip_sock_set_recverr(struct sock *sk, bool val)
+{
+ lock_sock(sk);
+ inet_sk(sk)->recverr = val;
+ if (!val)
+ skb_queue_purge(&sk->sk_error_queue);
+ release_sock(sk);
+}
+EXPORT_SYMBOL(ip_sock_set_recverr);
+
/*
* Socket option code for IP. This is the end of the line after any
* TCP,UDP etc options on an IP socket.
diff --git a/net/rxrpc/local_object.c b/net/rxrpc/local_object.c
index 562ea36c96b0f..1b87b8a9ff725 100644
--- a/net/rxrpc/local_object.c
+++ b/net/rxrpc/local_object.c
@@ -171,13 +171,7 @@ static int rxrpc_open_socket(struct rxrpc_local *local, struct net *net)
/* Fall through */
case AF_INET:
/* we want to receive ICMP errors */
- opt = 1;
- ret = kernel_setsockopt(local->socket, SOL_IP, IP_RECVERR,
- (char *) &opt, sizeof(opt));
- if (ret < 0) {
- _debug("setsockopt failed");
- goto error;
- }
+ ip_sock_set_recverr(local->socket->sk, true);
/* we want to set the don't fragment bit */
opt = IP_PMTUDISC_DO;
--
2.26.2
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