write in 30M

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2024-02-20 ea08eeccae9297f7aabd2ef7f0c2517ac4549acc

 kernel/net/ipv4/ipip.c
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@@ -1,3 +1,4 @@
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+// SPDX-License-Identifier: GPL-2.0-or-later
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 /*
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  *	Linux NET3:	IP/IP protocol decoder.
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  *
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@@ -16,12 +17,6 @@
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  *              Carlos Picoto   :       GRE over IP support
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  *		Alexey Kuznetsov:	Reworked. Really, now it is truncated version of ipv4/ip_gre.c.
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  *					I do not want to merge them together.
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- *
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- *	This program is free software; you can redistribute it and/or
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- *	modify it under the terms of the GNU General Public License
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- *	as published by the Free Software Foundation; either version
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- *	2 of the License, or (at your option) any later version.
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- *
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  */
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21
 
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 /* tunnel.c: an IP tunnel driver
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@@ -140,6 +135,13 @@
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 	struct ip_tunnel *t;
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 	int err = 0;
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+	t = ip_tunnel_lookup(itn, skb->dev->ifindex, TUNNEL_NO_KEY,
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+			     iph->daddr, iph->saddr, 0);
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+	if (!t) {
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+		err = -ENOENT;
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+		goto out;
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+	}
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+
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 	switch (type) {
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 	case ICMP_DEST_UNREACH:
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 		switch (code) {
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@@ -167,21 +169,13 @@
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 		goto out;
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 	}
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-	t = ip_tunnel_lookup(itn, skb->dev->ifindex, TUNNEL_NO_KEY,
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-			     iph->daddr, iph->saddr, 0);
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-	if (!t) {
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-		err = -ENOENT;
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-		goto out;
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-	}
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-
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 	if (type == ICMP_DEST_UNREACH && code == ICMP_FRAG_NEEDED) {
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-		ipv4_update_pmtu(skb, net, info, t->parms.link, 0,
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-				 iph->protocol, 0);
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+		ipv4_update_pmtu(skb, net, info, t->parms.link, iph->protocol);
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 		goto out;
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 	}
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 	if (type == ICMP_REDIRECT) {
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-		ipv4_redirect(skb, net, t->parms.link, 0, iph->protocol, 0);
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+		ipv4_redirect(skb, net, t->parms.link, iph->protocol);
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 		goto out;
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 	}
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@@ -306,7 +300,7 @@
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 	skb_set_inner_ipproto(skb, ipproto);
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 	if (tunnel->collect_md)
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-		ip_md_tunnel_xmit(skb, dev, ipproto);
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+		ip_md_tunnel_xmit(skb, dev, ipproto, 0);
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 	else
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 		ip_tunnel_xmit(skb, dev, tiph, ipproto);
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 	return NETDEV_TX_OK;
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@@ -333,41 +327,29 @@
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 }
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 static int
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-ipip_tunnel_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
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+ipip_tunnel_ctl(struct net_device *dev, struct ip_tunnel_parm *p, int cmd)
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 {
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-	int err = 0;
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-	struct ip_tunnel_parm p;
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-
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-	if (copy_from_user(&p, ifr->ifr_ifru.ifru_data, sizeof(p)))
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-		return -EFAULT;
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-
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 	if (cmd == SIOCADDTUNNEL || cmd == SIOCCHGTUNNEL) {
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-		if (p.iph.version != 4 ||
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-		    !ipip_tunnel_ioctl_verify_protocol(p.iph.protocol) ||
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-		    p.iph.ihl != 5 || (p.iph.frag_off&htons(~IP_DF)))
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+		if (p->iph.version != 4 ||
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+		    !ipip_tunnel_ioctl_verify_protocol(p->iph.protocol) ||
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+		    p->iph.ihl != 5 || (p->iph.frag_off & htons(~IP_DF)))
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 			return -EINVAL;
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 	}
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-	p.i_key = p.o_key = 0;
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-	p.i_flags = p.o_flags = 0;
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-	err = ip_tunnel_ioctl(dev, &p, cmd);
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-	if (err)
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-		return err;
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-
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-	if (copy_to_user(ifr->ifr_ifru.ifru_data, &p, sizeof(p)))
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-		return -EFAULT;
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-
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-	return 0;
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+	p->i_key = p->o_key = 0;
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+	p->i_flags = p->o_flags = 0;
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+	return ip_tunnel_ctl(dev, p, cmd);
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 }
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 static const struct net_device_ops ipip_netdev_ops = {
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 	.ndo_init       = ipip_tunnel_init,
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 	.ndo_uninit     = ip_tunnel_uninit,
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 	.ndo_start_xmit	= ipip_tunnel_xmit,
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-	.ndo_do_ioctl	= ipip_tunnel_ioctl,
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+	.ndo_do_ioctl	= ip_tunnel_ioctl,
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 	.ndo_change_mtu = ip_tunnel_change_mtu,
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 	.ndo_get_stats64 = ip_tunnel_get_stats64,
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 	.ndo_get_iflink = ip_tunnel_get_iflink,
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+	.ndo_tunnel_ctl	= ipip_tunnel_ctl,
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 };
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 #define IPIP_FEATURES (NETIF_F_SG |		\
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@@ -379,6 +361,7 @@
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 static void ipip_tunnel_setup(struct net_device *dev)
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 {
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 	dev->netdev_ops		= &ipip_netdev_ops;
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+	dev->header_ops		= &ip_tunnel_header_ops;
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 	dev->type		= ARPHRD_TUNNEL;
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 	dev->flags		= IFF_NOARP;