Merge master.kernel.org:/home/rmk/linux-2.6-serial

[powerpc.git] / net / ipv4 / devinet.c

diff --git a/net/ipv4/devinet.c b/net/ipv4/devinet.c
index 74f2207..44fdf14 100644 (file)
--- a/net/ipv4/devinet.c
+++ b/net/ipv4/devinet.c
@@ -32,6 +32,7 @@
 #include <asm/uaccess.h>
 #include <asm/system.h>
 #include <linux/bitops.h>
+#include <linux/capability.h>
 #include <linux/module.h>
 #include <linux/types.h>
 #include <linux/kernel.h>
@@ -58,6 +59,7 @@
 #endif
 #include <linux/kmod.h>
 
+#include <net/arp.h>
 #include <net/ip.h>
 #include <net/route.h>
 #include <net/ip_fib.h>
@@ -234,7 +236,10 @@ static void inet_del_ifa(struct in_device *in_dev, struct in_ifaddr **ifap,
                         int destroy)
 {
        struct in_ifaddr *promote = NULL;
-       struct in_ifaddr *ifa1 = *ifap;
+       struct in_ifaddr *ifa, *ifa1 = *ifap;
+       struct in_ifaddr *last_prim = in_dev->ifa_list;
+       struct in_ifaddr *prev_prom = NULL;
+       int do_promote = IN_DEV_PROMOTE_SECONDARIES(in_dev);
 
        ASSERT_RTNL();
 
@@ -243,18 +248,22 @@ static void inet_del_ifa(struct in_device *in_dev, struct in_ifaddr **ifap,
         **/
 
        if (!(ifa1->ifa_flags & IFA_F_SECONDARY)) {
-               struct in_ifaddr *ifa;
                struct in_ifaddr **ifap1 = &ifa1->ifa_next;
 
                while ((ifa = *ifap1) != NULL) {
+                       if (!(ifa->ifa_flags & IFA_F_SECONDARY) && 
+                           ifa1->ifa_scope <= ifa->ifa_scope)
+                               last_prim = ifa;
+
                        if (!(ifa->ifa_flags & IFA_F_SECONDARY) ||
                            ifa1->ifa_mask != ifa->ifa_mask ||
                            !inet_ifa_match(ifa1->ifa_address, ifa)) {
                                ifap1 = &ifa->ifa_next;
+                               prev_prom = ifa;
                                continue;
                        }
 
-                       if (!IN_DEV_PROMOTE_SECONDARIES(in_dev)) {
+                       if (!do_promote) {
                                *ifap1 = ifa->ifa_next;
 
                                rtmsg_ifa(RTM_DELADDR, ifa);
@@ -283,18 +292,31 @@ static void inet_del_ifa(struct in_device *in_dev, struct in_ifaddr **ifap,
         */
        rtmsg_ifa(RTM_DELADDR, ifa1);
        notifier_call_chain(&inetaddr_chain, NETDEV_DOWN, ifa1);
-       if (destroy) {
-               inet_free_ifa(ifa1);
 
-               if (!in_dev->ifa_list)
-                       inetdev_destroy(in_dev);
-       }
+       if (promote) {
+
+               if (prev_prom) {
+                       prev_prom->ifa_next = promote->ifa_next;
+                       promote->ifa_next = last_prim->ifa_next;
+                       last_prim->ifa_next = promote;
+               }
 
-       if (promote && IN_DEV_PROMOTE_SECONDARIES(in_dev)) {
-               /* not sure if we should send a delete notify first? */
                promote->ifa_flags &= ~IFA_F_SECONDARY;
                rtmsg_ifa(RTM_NEWADDR, promote);
                notifier_call_chain(&inetaddr_chain, NETDEV_UP, promote);
+               for (ifa = promote->ifa_next; ifa; ifa = ifa->ifa_next) {
+                       if (ifa1->ifa_mask != ifa->ifa_mask ||
+                           !inet_ifa_match(ifa1->ifa_address, ifa))
+                                       continue;
+                       fib_add_ifaddr(ifa);
+               }
+
+       }
+       if (destroy) {
+               inet_free_ifa(ifa1);
+
+               if (!in_dev->ifa_list)
+                       inetdev_destroy(in_dev);
        }
 }
 
@@ -715,6 +737,7 @@ int devinet_ioctl(unsigned int cmd, void __user *arg)
                        break;
                ret = 0;
                if (ifa->ifa_mask != sin->sin_addr.s_addr) {
+                       u32 old_mask = ifa->ifa_mask;
                        inet_del_ifa(in_dev, ifap, 0);
                        ifa->ifa_mask = sin->sin_addr.s_addr;
                        ifa->ifa_prefixlen = inet_mask_len(ifa->ifa_mask);
@@ -728,7 +751,7 @@ int devinet_ioctl(unsigned int cmd, void __user *arg)
                        if ((dev->flags & IFF_BROADCAST) &&
                            (ifa->ifa_prefixlen < 31) &&
                            (ifa->ifa_broadcast ==
-                            (ifa->ifa_local|~ifa->ifa_mask))) {
+                            (ifa->ifa_local|~old_mask))) {
                                ifa->ifa_broadcast = (ifa->ifa_local |
                                                      ~sin->sin_addr.s_addr);
                        }
@@ -1112,7 +1135,7 @@ static void rtmsg_ifa(int event, struct in_ifaddr* ifa)
 
        if (!skb)
                netlink_set_err(rtnl, 0, RTNLGRP_IPV4_IFADDR, ENOBUFS);
-       else if (inet_fill_ifaddr(skb, ifa, current->pid, 0, event, 0) < 0) {
+       else if (inet_fill_ifaddr(skb, ifa, 0, 0, event, 0) < 0) {
                kfree_skb(skb);
                netlink_set_err(rtnl, 0, RTNLGRP_IPV4_IFADDR, EINVAL);
        } else {
@@ -1370,6 +1393,14 @@ static struct devinet_sysctl_table {
                        .mode           = 0644,
                        .proc_handler   = &proc_dointvec,
                },
+               {
+                       .ctl_name       = NET_IPV4_CONF_ARP_ACCEPT,
+                       .procname       = "arp_accept",
+                       .data           = &ipv4_devconf.arp_accept,
+                       .maxlen         = sizeof(int),
+                       .mode           = 0644,
+                       .proc_handler   = &proc_dointvec,
+               },
                {
                        .ctl_name       = NET_IPV4_CONF_NOXFRM,
                        .procname       = "disable_xfrm",