Attachment 315397 Details for Bug 458270 – patch to backport referenced commits in ABI safe manner

[patch] patch to backport referenced commits in ABI safe manner

linux-kernel-test.patch (text/plain), 10.75 KB, created by Neil Horman on 2008-08-29 20:11:59 UTC

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Creator: Neil Horman

Created: 2008-08-29 20:11:59 UTC

Size: 10.75 KB

patch

obsolete

>--- linux-2.6.18.noarch/net/core/dev.c.orig	2008-08-29 16:00:46.000000000 -0400
>+++ linux-2.6.18.noarch/net/core/dev.c	2008-08-29 12:49:59.000000000 -0400
>@@ -3257,7 +3257,8 @@
> 
> 	/* ensure 32-byte alignment of both the device and private area */
> 	alloc_size = (sizeof(*dev) + NETDEV_ALIGN_CONST) & ~NETDEV_ALIGN_CONST;
>-	alloc_size += sizeof_priv + NETDEV_ALIGN_CONST;
>+	alloc_size += (sizeof_priv + NETDEV_ALIGN_CONST) & ~NETDEV_ALIGN_CONST;
>+	alloc_size += sizeof(struct net_device_extended) + NETDEV_ALIGN_CONST;
> 
> 	p = kzalloc(alloc_size, GFP_KERNEL);
> 	if (!p) {
>@@ -3274,6 +3275,7 @@
> 
> 	setup(dev);
> 	strcpy(dev->name, name);
>+	dev->priv_flags |= IFF_EXTENDED;
> 	return dev;
> }
> EXPORT_SYMBOL(alloc_netdev);
>--- linux-2.6.18.noarch/net/ipv6/addrconf.c.orig	2008-08-29 16:00:46.000000000 -0400
>+++ linux-2.6.18.noarch/net/ipv6/addrconf.c	2008-08-29 16:03:03.000000000 -0400
>@@ -131,6 +131,7 @@
> 
> static int addrconf_ifdown(struct net_device *dev, int how);
> 
>+static int ipv6_generate_eui64(u8 *eui, struct net_device *dev);
> static void addrconf_dad_start(struct inet6_ifaddr *ifp, u32 flags);
> static void addrconf_dad_timer(unsigned long data);
> static void addrconf_dad_completed(struct inet6_ifaddr *ifp);
>@@ -176,6 +177,11 @@
> #endif
> };
> 
>+struct ipv6_devconf_extensions ipv6_devconf_extensions = {
>+	.disable_ipv6 = 0,
>+	.accept_dad = 1,
>+};
>+
> static struct ipv6_devconf ipv6_devconf_dflt = {
> 	.forwarding		= 0,
> 	.hop_limit		= IPV6_DEFAULT_HOPLIMIT,
>@@ -206,6 +212,11 @@
> #endif
> };
> 
>+static struct ipv6_devconf_extensions ipv6_devconf_extensions_dflt = {
>+	.disable_ipv6		= 0,
>+	.accept_dad		= 1,
>+};
>+
> int sysctl_ip6_odad = 0;
> 
> /* IPv6 Wildcard Address and Loopback Address defined by RFC2553 */
>@@ -347,6 +358,7 @@
> {
> 	struct inet6_dev *ndev;
> 	struct in6_addr maddr;
>+	struct net_device_extended *ext = dev_extended(dev);
> 
> 	ASSERT_RTNL();
> 
>@@ -361,6 +373,9 @@
> 	rwlock_init(&ndev->lock);
> 	ndev->dev = dev;
> 	memcpy(&ndev->cnf, &ipv6_devconf_dflt, sizeof(ndev->cnf));
>+	if (ext != NULL)
>+		memcpy(&ext->ipv6_devconf_ext, &ipv6_devconf_extensions_dflt,
>+			sizeof(ext->ipv6_devconf_ext));
> 	ndev->cnf.mtu6 = dev->mtu;
> 	ndev->cnf.sysctl = NULL;
> 	ndev->nd_parms = neigh_parms_alloc(dev, &nd_tbl);
>@@ -396,6 +411,9 @@
> 	 */
> 	in6_dev_hold(ndev);
> 
>+	if (ext && (dev->flags & (IFF_NOARP | IFF_LOOPBACK)))
>+		ext->ipv6_devconf_ext.accept_dad = -1;
>+
> #ifdef CONFIG_IPV6_PRIVACY
> 	init_timer(&ndev->regen_timer);
> 	ndev->regen_timer.function = ipv6_regen_rndid;
>@@ -1339,6 +1357,25 @@
> 
> void addrconf_dad_failure(struct inet6_ifaddr *ifp)
> {
>+	struct inet6_dev *idev = ifp->idev;
>+	struct net_device_extended *ext;
>+
>+	ext = (idev->dev == NULL) ? NULL : dev_extended(idev->dev);
>+
>+	if (ext && ext->ipv6_devconf_ext.accept_dad > 1 && 
>+	    !ext->ipv6_devconf_ext.disable_ipv6) {
>+		struct in6_addr addr;
>+
>+		addr.s6_addr32[0] = htonl(0xfe800000);
>+		addr.s6_addr32[1] = 0;
>+
>+		if (!ipv6_generate_eui64(addr.s6_addr + 8, idev->dev) &&
>+		    ipv6_addr_equal(&ifp->addr, &addr)) {
>+			/* DAD failed for link-local based on MAC address */
>+			ext->ipv6_devconf_ext.disable_ipv6 = 1;
>+		}
>+	}
>+
> 	if (net_ratelimit())
> 		printk(KERN_INFO "%s: duplicate address detected!\n", ifp->idev->dev->name);
> 	addrconf_dad_stop(ifp);
>@@ -2623,12 +2660,21 @@
> 	struct inet6_dev *idev = ifp->idev;
> 	struct in6_addr unspec;
> 	struct in6_addr mcaddr;
>+	struct net_device_extended *ext = (idev == NULL) ? NULL : dev_extended(idev->dev);
> 
> 	read_lock_bh(&idev->lock);
> 	if (idev->dead) {
> 		read_unlock_bh(&idev->lock);
> 		goto out;
> 	}
>+
>+	if (ext && ext->ipv6_devconf_ext.accept_dad > 1 &&
>+	    ext->ipv6_devconf_ext.disable_ipv6) {
>+		read_unlock_bh(&idev->lock);
>+		addrconf_dad_failure(ifp);
>+		return;
>+	}
>+
> 	spin_lock_bh(&ifp->lock);
> 	if (ifp->probes == 0) {
> 		/*
>@@ -3374,7 +3420,7 @@
> 	netlink_broadcast(rtnl, skb, 0, RTNLGRP_IPV6_IFADDR, GFP_ATOMIC);
> }
> 
>-static void inline ipv6_store_devconf(struct ipv6_devconf *cnf,
>+static void inline ipv6_store_devconf(struct ipv6_devconf *cnf, struct ipv6_devconf_extensions *xcnf,
> 				__s32 *array, int bytes)
> {
> 	memset(array, 0, bytes);
>@@ -3406,6 +3452,10 @@
> 	array[DEVCONF_ACCEPT_RA_RT_INFO_MAX_PLEN] = cnf->accept_ra_rt_info_max_plen;
> #endif
> #endif
>+	if (xcnf) {
>+		array[DEVCONF_DISABLE_IPV6] = xcnf->disable_ipv6;
>+		array[DEVCONF_ACCEPT_DAD] = xcnf->accept_dad;
>+	}
> }
> 
> /* Maximum length of ifinfomsg attributes */
>@@ -3430,6 +3480,8 @@
> 	struct rtattr		*subattr;
> 	__u32			mtu = dev->mtu;
> 	struct ifla_cacheinfo	ci;
>+	struct net_device_extended *ext = (dev == NULL) ? NULL : dev_extended(dev);
>+	struct ipv6_devconf_extensions *xcnf = (ext == NULL) ? NULL : &ext->ipv6_devconf_ext;
> 
> 	nlh = NLMSG_NEW(skb, pid, seq, event, sizeof(*r), flags);
> 	r = NLMSG_DATA(nlh);
>@@ -3467,7 +3519,7 @@
> 	/* return the device sysctl params */
> 	if ((array = kmalloc(DEVCONF_MAX * sizeof(*array), GFP_ATOMIC)) == NULL)
> 		goto rtattr_failure;
>-	ipv6_store_devconf(&idev->cnf, array, DEVCONF_MAX * sizeof(*array));
>+	ipv6_store_devconf(&idev->cnf, xcnf, array, DEVCONF_MAX * sizeof(*array));
> 	RTA_PUT(skb, IFLA_INET6_CONF, DEVCONF_MAX * sizeof(*array), array);
> 
> 	/* XXX - Statistics/MC not implemented */
>@@ -3835,6 +3887,22 @@
> 			.mode		=	0644,
>          		.proc_handler	=	&proc_dointvec,
> 		},
>+		{
>+			.ctl_name	=	NET_IPV6_DISABLE,
>+			.procname	=	"disable_ipv6",
>+			.data		=	&ipv6_devconf_extensions.disable_ipv6,
>+			.maxlen		=	sizeof(int),
>+			.mode		=	0644,
>+			.proc_handler	=	&proc_dointvec,
>+		},
>+		{
>+			.ctl_name	=	NET_IPV6_ACCEPT_DAD,
>+			.procname	=	"accept_dad",
>+			.data		=	&ipv6_devconf_extensions.accept_dad,
>+			.maxlen		=	sizeof(int),
>+			.mode		=	0644,
>+			.proc_handler	=	&proc_dointvec,
>+		},
> #ifdef CONFIG_IPV6_PRIVACY
> 		{
> 			.ctl_name	=	NET_IPV6_USE_TEMPADDR,
>@@ -3985,6 +4053,8 @@
> 	int i;
> 	struct net_device *dev = idev ? idev->dev : NULL;
> 	struct addrconf_sysctl_table *t;
>+	struct net_device_extended *ext;
>+	struct ipv6_devconf_extensions *dext;
> 	char *dev_name = NULL;
> 
> 	t = kmalloc(sizeof(*t), GFP_KERNEL);
>@@ -3992,9 +4062,29 @@
> 		return;
> 	memcpy(t, &addrconf_sysctl, sizeof(*t));
> 	for (i=0; t->addrconf_vars[i].data; i++) {
>-		t->addrconf_vars[i].data += (char*)p - (char*)&ipv6_devconf;
>-		t->addrconf_vars[i].de = NULL;
>-		t->addrconf_vars[i].extra1 = idev; /* embedded; no ref */
>+		if (i <= NET_IPV6_SYSCTL_EXTENDED_BOUNDARY) {
>+			t->addrconf_vars[i].data += (char*)p - (char*)&ipv6_devconf;
>+			t->addrconf_vars[i].de = NULL;
>+			t->addrconf_vars[i].extra1 = idev; /* embedded; no ref */
>+		} else {
>+			ext = (dev == NULL) ? NULL : dev_extended(dev);
>+			if (ext == NULL)
>+				if (p == &ipv6_devconf_dflt)
>+					dext = &ipv6_devconf_extensions_dflt;
>+				else
>+					continue;
>+			else
>+				dext = &ext->ipv6_devconf_ext;
>+
>+			/*
>+			 * Common settings for the extensions
>+			 */
>+			t->addrconf_vars[i].de = NULL;
>+			t->addrconf_vars[i].extra1 = idev;
>+			t->addrconf_vars[i].data +=
>+				(char *)dext - (char *)&ipv6_devconf_extensions;
>+		}
>+
> 	}
> 	if (dev) {
> 		dev_name = dev->name; 
>--- linux-2.6.18.noarch/net/ipv6/ip6_output.c.orig	2008-08-29 16:00:46.000000000 -0400
>+++ linux-2.6.18.noarch/net/ipv6/ip6_output.c	2008-08-29 12:50:12.000000000 -0400
>@@ -149,6 +149,15 @@
> 
> int ip6_output(struct sk_buff *skb)
> {
>+	struct inet6_dev *idev = ip6_dst_idev(skb->dst);
>+	struct net_device_extended *ext = dev_extended(idev->dev);
>+
>+	if (unlikely(!ext && ext->ipv6_devconf_ext.disable_ipv6)) {
>+		IP6_INC_STATS(idev, IPSTATS_MIB_OUTDISCARDS);
>+		kfree_skb(skb);
>+		return 0;
>+	}
>+
> 	if ((skb->len > dst_mtu(skb->dst) && !skb_is_gso(skb)) ||
> 				dst_allfrag(skb->dst))
> 		return ip6_fragment(skb, ip6_output2);
>--- linux-2.6.18.noarch/net/ipv6/ip6_input.c.orig	2008-08-29 16:00:46.000000000 -0400
>+++ linux-2.6.18.noarch/net/ipv6/ip6_input.c	2008-08-29 12:50:12.000000000 -0400
>@@ -61,6 +61,7 @@
> 	struct ipv6hdr *hdr;
> 	u32 		pkt_len;
> 	struct inet6_dev *idev;
>+	struct net_device_extended *ext = dev_extended(dev);
> 
> 	if (skb->pkt_type == PACKET_OTHERHOST) {
> 		kfree_skb(skb);
>@@ -73,7 +74,8 @@
> 
> 	IP6_INC_STATS_BH(idev, IPSTATS_MIB_INRECEIVES);
> 
>-	if ((skb = skb_share_check(skb, GFP_ATOMIC)) == NULL) {
>+	if ((skb = skb_share_check(skb, GFP_ATOMIC)) == NULL ||
>+	    !ext || unlikely(ext->ipv6_devconf_ext.disable_ipv6)) {
> 		IP6_INC_STATS_BH(idev, IPSTATS_MIB_INDISCARDS);
> 		rcu_read_unlock();
> 		goto out;
>--- linux-2.6.18.noarch/include/linux/ipv6.h.orig	2008-08-29 16:00:46.000000000 -0400
>+++ linux-2.6.18.noarch/include/linux/ipv6.h	2008-08-29 15:15:35.000000000 -0400
>@@ -182,6 +182,8 @@
> 	DEVCONF_ACCEPT_RA_RTR_PREF,
> 	DEVCONF_RTR_PROBE_INTERVAL,
> 	DEVCONF_ACCEPT_RA_RT_INFO_MAX_PLEN,
>+	DEVCONF_DISABLE_IPV6,
>+	DEVCONF_ACCEPT_DAD,
> 	DEVCONF_MAX
> };
> 
>--- linux-2.6.18.noarch/include/linux/if.h.orig	2008-08-29 16:00:46.000000000 -0400
>+++ linux-2.6.18.noarch/include/linux/if.h	2008-08-29 12:49:59.000000000 -0400
>@@ -61,6 +61,7 @@
> #define IFF_MASTER_ALB	0x10		/* bonding master, balance-alb.	*/
> #define IFF_BONDING	0x20		/* bonding master or slave	*/
> #define IFF_SLAVE_NEEDARP 0x40		/* need ARPs for validation	*/
>+#define IFF_EXTENDED	0x80		/* Extended data available	*/
> 
> #define IF_GET_IFACE	0x0001		/* for querying only */
> #define IF_GET_PROTO	0x0002
>--- linux-2.6.18.noarch/include/linux/sysctl.h.orig	2008-08-29 16:00:46.000000000 -0400
>+++ linux-2.6.18.noarch/include/linux/sysctl.h	2008-08-29 12:50:12.000000000 -0400
>@@ -577,6 +577,9 @@
> 	NET_IPV6_ACCEPT_RA_RTR_PREF=20,
> 	NET_IPV6_RTR_PROBE_INTERVAL=21,
> 	NET_IPV6_ACCEPT_RA_RT_INFO_MAX_PLEN=22,
>+#define NET_IPV6_SYSCTL_EXTENDED_BOUNDARY NET_IPV6_ACCEPT_RA_RT_INFO_MAX_PLEN
>+	NET_IPV6_DISABLE=23,
>+	NET_IPV6_ACCEPT_DAD=24,
> 	__NET_IPV6_MAX
> };
> 
>--- linux-2.6.18.noarch/include/linux/netdevice.h.orig	2008-08-29 16:00:46.000000000 -0400
>+++ linux-2.6.18.noarch/include/linux/netdevice.h	2008-08-29 12:50:12.000000000 -0400
>@@ -535,6 +535,23 @@
> 	struct class_device	class_dev;
> 	/* space for optional statistics and wireless sysfs groups */
> 	struct attribute_group  *sysfs_groups[3];
>+#ifndef __GENKSYMS__
>+	unsigned short priv_len;
>+#endif
>+};
>+
>+/*
>+ * struct net_device can't be modified without breaking ABI, so we 
>+ * add net_device_extended to the end in alloc_netdev.  Anything that 
>+ * needs to be added to a net_device can be appended here
>+ */
>+struct ipv6_devconf_extensions {
>+	s32 disable_ipv6;
>+	s32 accept_dad;
>+};
>+
>+struct net_device_extended {
>+	struct ipv6_devconf_extensions ipv6_devconf_ext;
> };
> 
> #define	NETDEV_ALIGN		32
>@@ -547,6 +564,14 @@
> 				& ~NETDEV_ALIGN_CONST);
> }
> 
>+static inline struct net_device_extended *dev_extended(struct net_device *dev)
>+{
>+	if (!(dev->priv_flags & IFF_EXTENDED))
>+		return NULL;
>+	return (struct net_device_extended *) ((char *) netdev_priv(dev) +
>+		((dev->priv_len + NETDEV_ALIGN_CONST) & ~NETDEV_ALIGN_CONST));
>+}
>+
> #define SET_MODULE_OWNER(dev) do { } while (0)
> /* Set the sysfs physical device reference for the network logical device
>  * if set prior to registration will cause a symlink during initialization.

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Attachments on bug 458270: 315397 | 315538 | 315911 | 316111