linux-kernel - [PATCH net-next-2.6 v2] net: ping: dont call udp

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Date:	Mon, 16 May 2011 09:26:31 +0200
From:	Eric Dumazet <eric.dumazet@...il.com>
To:	David Miller <davem@...emloft.net>
Cc:	solar@...nwall.com, segoon@...nwall.com,
	linux-kernel@...r.kernel.org, netdev@...r.kernel.org,
	peak@...o.troja.mff.cuni.cz, kees.cook@...onical.com,
	dan.j.rosenberg@...il.com, eugene@...hat.com, nelhage@...lice.com,
	kuznet@....inr.ac.ru, pekkas@...core.fi, jmorris@...ei.org,
	yoshfuji@...ux-ipv6.org, kaber@...sh.net
Subject: [PATCH net-next-2.6 v2] net: ping: dont call udp_ioctl()

Le dimanche 15 mai 2011 à 17:44 -0400, David Miller a écrit :

> Just get rid of ping_ioctl() entirely, as that is the effect of
> this change since inet_ioctl() returns -ENOIOCTLCMD when
> sk_prot->ioctl is NULL.
> 
> Also get rid of asm/ioctls.h since that will be no longer needed.

Sure, here is updated version, thanks.

[PATCH net-next-2.6 v2] net: ping: dont call udp_ioctl()

udp_ioctl() really handles UDP and UDPLite protocols.

1) It can increment UDP_MIB_INERRORS in case first_packet_length() finds
a frame with bad checksum.

2) It has a dependency on sizeof(struct udphdr), not applicable to
ICMP/PING

If ping sockets need to handle SIOCINQ/SIOCOUTQ ioctl, this should be
done differently.

Signed-off-by: Eric Dumazet <eric.dumazet@...il.com>
CC: Vasiliy Kulikov <segoon@...nwall.com>
---
 net/ipv4/ping.c |   19 -------------------
 1 file changed, 19 deletions(-)

diff --git a/net/ipv4/ping.c b/net/ipv4/ping.c
index 7041d09..41836ab 100644
--- a/net/ipv4/ping.c
+++ b/net/ipv4/ping.c
@@ -22,7 +22,6 @@
 
 #include <asm/system.h>
 #include <linux/uaccess.h>
-#include <asm/ioctls.h>
 #include <linux/types.h>
 #include <linux/fcntl.h>
 #include <linux/socket.h>
@@ -609,23 +608,6 @@ do_confirm:
 	goto out;
 }
 
-/*
- *	IOCTL requests applicable to the UDP^H^H^HICMP protocol
- */
-
-int ping_ioctl(struct sock *sk, int cmd, unsigned long arg)
-{
-	pr_debug("ping_ioctl(sk=%p,sk->num=%u,cmd=%d,arg=%lu)\n",
-		inet_sk(sk), inet_sk(sk)->inet_num, cmd, arg);
-	switch (cmd) {
-	case SIOCOUTQ:
-	case SIOCINQ:
-		return udp_ioctl(sk, cmd, arg);
-	default:
-		return -ENOIOCTLCMD;
-	}
-}
-
 int ping_recvmsg(struct kiocb *iocb, struct sock *sk, struct msghdr *msg,
 		 size_t len, int noblock, int flags, int *addr_len)
 {
@@ -735,7 +717,6 @@ struct proto ping_prot = {
 	.close =	ping_close,
 	.connect =	ip4_datagram_connect,
 	.disconnect =	udp_disconnect,
-	.ioctl =	ping_ioctl,
 	.setsockopt =	ip_setsockopt,
 	.getsockopt =	ip_getsockopt,
 	.sendmsg =	ping_sendmsg,


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