X-Git-Url: http://pilppa.org/gitweb/gitweb.cgi?a=blobdiff_plain;f=net%2Fipv4%2Fdevinet.c;h=55d199e4ae212813dd737a9cf2706b7f9cccbe38;hb=2588fe1d782f1686847493ad643157d5d10bf602;hp=00940660739fc8897c592289fedc8840f3394aa0;hpb=42f811b8bcdf6695bf74de580b1daf53445e8949;p=linux-2.6-omap-h63xx.git

diff --git a/net/ipv4/devinet.c b/net/ipv4/devinet.c
index 00940660739..55d199e4ae2 100644
--- a/net/ipv4/devinet.c
+++ b/net/ipv4/devinet.c
@@ -84,7 +84,7 @@ static struct ipv4_devconf ipv4_devconf_dflt = {
 
 #define IPV4_DEVCONF_DFLT(attr) IPV4_DEVCONF(ipv4_devconf_dflt, attr)
 
-static struct nla_policy ifa_ipv4_policy[IFA_MAX+1] __read_mostly = {
+static const struct nla_policy ifa_ipv4_policy[IFA_MAX+1] = {
 	[IFA_LOCAL]     	= { .type = NLA_U32 },
 	[IFA_ADDRESS]   	= { .type = NLA_U32 },
 	[IFA_BROADCAST] 	= { .type = NLA_U32 },
@@ -147,7 +147,7 @@ void in_dev_finish_destroy(struct in_device *idev)
 	}
 }
 
-struct in_device *inetdev_init(struct net_device *dev)
+static struct in_device *inetdev_init(struct net_device *dev)
 {
 	struct in_device *in_dev;
 
@@ -203,8 +203,6 @@ static void inetdev_destroy(struct in_device *in_dev)
 	ASSERT_RTNL();
 
 	dev = in_dev->dev;
-	if (dev == &loopback_dev)
-		return;
 
 	in_dev->dead = 1;
 
@@ -327,12 +325,8 @@ static void __inet_del_ifa(struct in_device *in_dev, struct in_ifaddr **ifap,
 		}
 
 	}
-	if (destroy) {
+	if (destroy)
 		inet_free_ifa(ifa1);
-
-		if (!in_dev->ifa_list)
-			inetdev_destroy(in_dev);
-	}
 }
 
 static void inet_del_ifa(struct in_device *in_dev, struct in_ifaddr **ifap,
@@ -405,12 +399,10 @@ static int inet_set_ifa(struct net_device *dev, struct in_ifaddr *ifa)
 	ASSERT_RTNL();
 
 	if (!in_dev) {
-		in_dev = inetdev_init(dev);
-		if (!in_dev) {
-			inet_free_ifa(ifa);
-			return -ENOBUFS;
-		}
+		inet_free_ifa(ifa);
+		return -ENOBUFS;
 	}
+	ipv4_devconf_setall(in_dev);
 	if (ifa->ifa_dev != in_dev) {
 		BUG_TRAP(!ifa->ifa_dev);
 		in_dev_hold(in_dev);
@@ -426,7 +418,7 @@ struct in_device *inetdev_by_index(int ifindex)
 	struct net_device *dev;
 	struct in_device *in_dev = NULL;
 	read_lock(&dev_base_lock);
-	dev = __dev_get_by_index(ifindex);
+	dev = __dev_get_by_index(&init_net, ifindex);
 	if (dev)
 		in_dev = in_dev_get(dev);
 	read_unlock(&dev_base_lock);
@@ -512,7 +504,7 @@ static struct in_ifaddr *rtm_to_ifaddr(struct nlmsghdr *nlh)
 		goto errout;
 	}
 
-	dev = __dev_get_by_index(ifm->ifa_index);
+	dev = __dev_get_by_index(&init_net, ifm->ifa_index);
 	if (dev == NULL) {
 		err = -ENODEV;
 		goto errout;
@@ -520,13 +512,12 @@ static struct in_ifaddr *rtm_to_ifaddr(struct nlmsghdr *nlh)
 
 	in_dev = __in_dev_get_rtnl(dev);
 	if (in_dev == NULL) {
-		in_dev = inetdev_init(dev);
-		if (in_dev == NULL) {
-			err = -ENOBUFS;
-			goto errout;
-		}
+		err = -ENOBUFS;
+		goto errout;
 	}
 
+	ipv4_devconf_setall(in_dev);
+
 	ifa = inet_alloc_ifa();
 	if (ifa == NULL) {
 		/*
@@ -635,7 +626,7 @@ int devinet_ioctl(unsigned int cmd, void __user *arg)
 		*colon = 0;
 
 #ifdef CONFIG_KMOD
-	dev_load(ifr.ifr_name);
+	dev_load(&init_net, ifr.ifr_name);
 #endif
 
 	switch (cmd) {
@@ -676,7 +667,7 @@ int devinet_ioctl(unsigned int cmd, void __user *arg)
 	rtnl_lock();
 
 	ret = -ENODEV;
-	if ((dev = __dev_get_by_name(ifr.ifr_name)) == NULL)
+	if ((dev = __dev_get_by_name(&init_net, ifr.ifr_name)) == NULL)
 		goto done;
 
 	if (colon)
@@ -916,7 +907,7 @@ no_in_dev:
 	 */
 	read_lock(&dev_base_lock);
 	rcu_read_lock();
-	for_each_netdev(dev) {
+	for_each_netdev(&init_net, dev) {
 		if ((in_dev = __in_dev_get_rcu(dev)) == NULL)
 			continue;
 
@@ -995,7 +986,7 @@ __be32 inet_confirm_addr(const struct net_device *dev, __be32 dst, __be32 local,
 
 	read_lock(&dev_base_lock);
 	rcu_read_lock();
-	for_each_netdev(dev) {
+	for_each_netdev(&init_net, dev) {
 		if ((in_dev = __in_dev_get_rcu(dev))) {
 			addr = confirm_addr_indev(in_dev, dst, local, scope);
 			if (addr)
@@ -1058,15 +1049,17 @@ static int inetdev_event(struct notifier_block *this, unsigned long event,
 	struct net_device *dev = ptr;
 	struct in_device *in_dev = __in_dev_get_rtnl(dev);
 
+	if (dev->nd_net != &init_net)
+		return NOTIFY_DONE;
+
 	ASSERT_RTNL();
 
 	if (!in_dev) {
 		if (event == NETDEV_REGISTER) {
 			in_dev = inetdev_init(dev);
-			if (dev == &loopback_dev) {
-				if (!in_dev)
-					panic("devinet: "
-					      "Failed to create loopback\n");
+			if (!in_dev)
+				return notifier_from_errno(-ENOMEM);
+			if (dev->flags & IFF_LOOPBACK) {
 				IN_DEV_CONF_SET(in_dev, NOXFRM, 1);
 				IN_DEV_CONF_SET(in_dev, NOPOLICY, 1);
 			}
@@ -1082,7 +1075,7 @@ static int inetdev_event(struct notifier_block *this, unsigned long event,
 	case NETDEV_UP:
 		if (dev->mtu < 68)
 			break;
-		if (dev == &loopback_dev) {
+		if (dev->flags & IFF_LOOPBACK) {
 			struct in_ifaddr *ifa;
 			if ((ifa = inet_alloc_ifa()) != NULL) {
 				ifa->ifa_local =
@@ -1190,7 +1183,7 @@ static int inet_dump_ifaddr(struct sk_buff *skb, struct netlink_callback *cb)
 
 	s_ip_idx = ip_idx = cb->args[1];
 	idx = 0;
-	for_each_netdev(dev) {
+	for_each_netdev(&init_net, dev) {
 		if (idx < s_idx)
 			goto cont;
 		if (idx > s_idx)
@@ -1201,7 +1194,7 @@ static int inet_dump_ifaddr(struct sk_buff *skb, struct netlink_callback *cb)
 		for (ifa = in_dev->ifa_list, ip_idx = 0; ifa;
 		     ifa = ifa->ifa_next, ip_idx++) {
 			if (ip_idx < s_ip_idx)
-				goto cont;
+				continue;
 			if (inet_fill_ifaddr(skb, ifa, NETLINK_CB(cb->skb).pid,
 					     cb->nlh->nlmsg_seq,
 					     RTM_NEWADDR, NLM_F_MULTI) <= 0)
@@ -1244,6 +1237,91 @@ errout:
 
 #ifdef CONFIG_SYSCTL
 
+static void devinet_copy_dflt_conf(int i)
+{
+	struct net_device *dev;
+
+	read_lock(&dev_base_lock);
+	for_each_netdev(&init_net, dev) {
+		struct in_device *in_dev;
+		rcu_read_lock();
+		in_dev = __in_dev_get_rcu(dev);
+		if (in_dev && !test_bit(i, in_dev->cnf.state))
+			in_dev->cnf.data[i] = ipv4_devconf_dflt.data[i];
+		rcu_read_unlock();
+	}
+	read_unlock(&dev_base_lock);
+}
+
+static int devinet_conf_proc(ctl_table *ctl, int write,
+			     struct file* filp, void __user *buffer,
+			     size_t *lenp, loff_t *ppos)
+{
+	int ret = proc_dointvec(ctl, write, filp, buffer, lenp, ppos);
+
+	if (write) {
+		struct ipv4_devconf *cnf = ctl->extra1;
+		int i = (int *)ctl->data - cnf->data;
+
+		set_bit(i, cnf->state);
+
+		if (cnf == &ipv4_devconf_dflt)
+			devinet_copy_dflt_conf(i);
+	}
+
+	return ret;
+}
+
+static int devinet_conf_sysctl(ctl_table *table, int __user *name, int nlen,
+			       void __user *oldval, size_t __user *oldlenp,
+			       void __user *newval, size_t newlen)
+{
+	struct ipv4_devconf *cnf;
+	int *valp = table->data;
+	int new;
+	int i;
+
+	if (!newval || !newlen)
+		return 0;
+
+	if (newlen != sizeof(int))
+		return -EINVAL;
+
+	if (get_user(new, (int __user *)newval))
+		return -EFAULT;
+
+	if (new == *valp)
+		return 0;
+
+	if (oldval && oldlenp) {
+		size_t len;
+
+		if (get_user(len, oldlenp))
+			return -EFAULT;
+
+		if (len) {
+			if (len > table->maxlen)
+				len = table->maxlen;
+			if (copy_to_user(oldval, valp, len))
+				return -EFAULT;
+			if (put_user(len, oldlenp))
+				return -EFAULT;
+		}
+	}
+
+	*valp = new;
+
+	cnf = table->extra1;
+	i = (int *)table->data - cnf->data;
+
+	set_bit(i, cnf->state);
+
+	if (cnf == &ipv4_devconf_dflt)
+		devinet_copy_dflt_conf(i);
+
+	return 1;
+}
+
 void inet_forward_change(void)
 {
 	struct net_device *dev;
@@ -1253,7 +1331,7 @@ void inet_forward_change(void)
 	IPV4_DEVCONF_DFLT(FORWARDING) = on;
 
 	read_lock(&dev_base_lock);
-	for_each_netdev(dev) {
+	for_each_netdev(&init_net, dev) {
 		struct in_device *in_dev;
 		rcu_read_lock();
 		in_dev = __in_dev_get_rcu(dev);
@@ -1302,40 +1380,13 @@ int ipv4_doint_and_flush_strategy(ctl_table *table, int __user *name, int nlen,
 				  void __user *oldval, size_t __user *oldlenp,
 				  void __user *newval, size_t newlen)
 {
-	int *valp = table->data;
-	int new;
-
-	if (!newval || !newlen)
-		return 0;
-
-	if (newlen != sizeof(int))
-		return -EINVAL;
-
-	if (get_user(new, (int __user *)newval))
-		return -EFAULT;
-
-	if (new == *valp)
-		return 0;
+	int ret = devinet_conf_sysctl(table, name, nlen, oldval, oldlenp,
+				      newval, newlen);
 
-	if (oldval && oldlenp) {
-		size_t len;
-
-		if (get_user(len, oldlenp))
-			return -EFAULT;
-
-		if (len) {
-			if (len > table->maxlen)
-				len = table->maxlen;
-			if (copy_to_user(oldval, valp, len))
-				return -EFAULT;
-			if (put_user(len, oldlenp))
-				return -EFAULT;
-		}
-	}
+	if (ret == 1)
+		rt_cache_flush(0);
 
-	*valp = new;
-	rt_cache_flush(0);
-	return 1;
+	return ret;
 }
 
 
@@ -1349,13 +1400,16 @@ int ipv4_doint_and_flush_strategy(ctl_table *table, int __user *name, int nlen,
 		.mode		= mval, \
 		.proc_handler	= proc, \
 		.strategy	= sysctl, \
+		.extra1		= &ipv4_devconf, \
 	}
 
 #define DEVINET_SYSCTL_RW_ENTRY(attr, name) \
-	DEVINET_SYSCTL_ENTRY(attr, name, 0644, &proc_dointvec, NULL)
+	DEVINET_SYSCTL_ENTRY(attr, name, 0644, devinet_conf_proc, \
+			     devinet_conf_sysctl)
 
 #define DEVINET_SYSCTL_RO_ENTRY(attr, name) \
-	DEVINET_SYSCTL_ENTRY(attr, name, 0444, &proc_dointvec, NULL)
+	DEVINET_SYSCTL_ENTRY(attr, name, 0444, devinet_conf_proc, \
+			     devinet_conf_sysctl)
 
 #define DEVINET_SYSCTL_COMPLEX_ENTRY(attr, name, proc, sysctl) \
 	DEVINET_SYSCTL_ENTRY(attr, name, 0644, proc, sysctl)
@@ -1374,7 +1428,8 @@ static struct devinet_sysctl_table {
 } devinet_sysctl = {
 	.devinet_vars = {
 		DEVINET_SYSCTL_COMPLEX_ENTRY(FORWARDING, "forwarding",
-					     devinet_sysctl_forward, NULL),
+					     devinet_sysctl_forward,
+					     devinet_conf_sysctl),
 		DEVINET_SYSCTL_RO_ENTRY(MC_FORWARDING, "mc_forwarding"),
 
 		DEVINET_SYSCTL_RW_ENTRY(ACCEPT_REDIRECTS, "accept_redirects"),
@@ -1448,6 +1503,7 @@ static void devinet_sysctl_register(struct in_device *in_dev,
 		return;
 	for (i = 0; i < ARRAY_SIZE(t->devinet_vars) - 1; i++) {
 		t->devinet_vars[i].data += (char *)p - (char *)&ipv4_devconf;
+		t->devinet_vars[i].extra1 = p;
 	}
 
 	if (dev) {