ipvlan: fix check for IP addresses in control path

When an ipvlan interface is down, its addresses are not on the hash list.
Fix checks for existence of addresses not to depend on the hash list, walk
through all interface addresses instead.

Signed-off-by: Jiri Benc <jbenc@redhat.com>
Acked-by: Mahesh Bandewar <maheshb@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/drivers/net/ipvlan/ipvlan.h b/drivers/net/ipvlan/ipvlan.h
index 924ea98bd5311b1c7197a9fe4e9b475b095069ce..54549a6223dd2f47f493ae112a06f12f3337120f 100644 (file)
--- a/drivers/net/ipvlan/ipvlan.h
+++ b/drivers/net/ipvlan/ipvlan.h
@@ -114,7 +114,9 @@ unsigned int ipvlan_mac_hash(const unsigned char *addr);
 rx_handler_result_t ipvlan_handle_frame(struct sk_buff **pskb);
 int ipvlan_queue_xmit(struct sk_buff *skb, struct net_device *dev);
 void ipvlan_ht_addr_add(struct ipvl_dev *ipvlan, struct ipvl_addr *addr);
-bool ipvlan_addr_busy(struct ipvl_dev *ipvlan, void *iaddr, bool is_v6);
+struct ipvl_addr *ipvlan_find_addr(const struct ipvl_dev *ipvlan,
+                                  const void *iaddr, bool is_v6);
+bool ipvlan_addr_busy(struct ipvl_port *port, void *iaddr, bool is_v6);
 struct ipvl_addr *ipvlan_ht_addr_lookup(const struct ipvl_port *port,
                                        const void *iaddr, bool is_v6);
 void ipvlan_ht_addr_del(struct ipvl_addr *addr, bool sync);

diff --git a/drivers/net/ipvlan/ipvlan_core.c b/drivers/net/ipvlan/ipvlan_core.c
index 568628f95aa25bc8ac678c1ce66d69ed7b7e5851..b7877a194cfe430469af8031c58efdf307eafc4f 100644 (file)
--- a/drivers/net/ipvlan/ipvlan_core.c
+++ b/drivers/net/ipvlan/ipvlan_core.c
@@ -92,9 +92,9 @@ void ipvlan_ht_addr_del(struct ipvl_addr *addr, bool sync)
                synchronize_rcu();
 }
 
-bool ipvlan_addr_busy(struct ipvl_dev *ipvlan, void *iaddr, bool is_v6)
+struct ipvl_addr *ipvlan_find_addr(const struct ipvl_dev *ipvlan,
+                                  const void *iaddr, bool is_v6)
 {
-       struct ipvl_port *port = ipvlan->port;
        struct ipvl_addr *addr;
 
        list_for_each_entry(addr, &ipvlan->addrs, anode) {
@@ -102,12 +102,21 @@ bool ipvlan_addr_busy(struct ipvl_dev *ipvlan, void *iaddr, bool is_v6)
                    ipv6_addr_equal(&addr->ip6addr, iaddr)) ||
                    (!is_v6 && addr->atype == IPVL_IPV4 &&
                    addr->ip4addr.s_addr == ((struct in_addr *)iaddr)->s_addr))
-                       return true;
+                       return addr;
        }
+       return NULL;
+}
 
-       if (ipvlan_ht_addr_lookup(port, iaddr, is_v6))
-               return true;
+bool ipvlan_addr_busy(struct ipvl_port *port, void *iaddr, bool is_v6)
+{
+       struct ipvl_dev *ipvlan;
+
+       ASSERT_RTNL();
 
+       list_for_each_entry(ipvlan, &port->ipvlans, pnode) {
+               if (ipvlan_find_addr(ipvlan, iaddr, is_v6))
+                       return true;
+       }
        return false;
 }
 

diff --git a/drivers/net/ipvlan/ipvlan_main.c b/drivers/net/ipvlan/ipvlan_main.c
index aaa005bd21ce16b4fd037e263e00ef4bfa966298..4fa14208d79931df1b5d8707744e93043b951424 100644 (file)
--- a/drivers/net/ipvlan/ipvlan_main.c
+++ b/drivers/net/ipvlan/ipvlan_main.c
@@ -607,7 +607,7 @@ static int ipvlan_add_addr6(struct ipvl_dev *ipvlan, struct in6_addr *ip6_addr)
 {
        struct ipvl_addr *addr;
 
-       if (ipvlan_addr_busy(ipvlan, ip6_addr, true)) {
+       if (ipvlan_addr_busy(ipvlan->port, ip6_addr, true)) {
                netif_err(ipvlan, ifup, ipvlan->dev,
                          "Failed to add IPv6=%pI6c addr for %s intf\n",
                          ip6_addr, ipvlan->dev->name);
@@ -635,7 +635,7 @@ static void ipvlan_del_addr6(struct ipvl_dev *ipvlan, struct in6_addr *ip6_addr)
 {
        struct ipvl_addr *addr;
 
-       addr = ipvlan_ht_addr_lookup(ipvlan->port, ip6_addr, true);
+       addr = ipvlan_find_addr(ipvlan, ip6_addr, true);
        if (!addr)
                return;
 
@@ -679,7 +679,7 @@ static int ipvlan_add_addr4(struct ipvl_dev *ipvlan, struct in_addr *ip4_addr)
 {
        struct ipvl_addr *addr;
 
-       if (ipvlan_addr_busy(ipvlan, ip4_addr, false)) {
+       if (ipvlan_addr_busy(ipvlan->port, ip4_addr, false)) {
                netif_err(ipvlan, ifup, ipvlan->dev,
                          "Failed to add IPv4=%pI4 on %s intf.\n",
                          ip4_addr, ipvlan->dev->name);
@@ -708,7 +708,7 @@ static void ipvlan_del_addr4(struct ipvl_dev *ipvlan, struct in_addr *ip4_addr)
 {
        struct ipvl_addr *addr;
 
-       addr = ipvlan_ht_addr_lookup(ipvlan->port, ip4_addr, false);
+       addr = ipvlan_find_addr(ipvlan, ip4_addr, false);
        if (!addr)
                return;