batman-adv: Prefix hard-interface non-static functions with batadv_

batman-adv can be compiled as part of the kernel instead of an module. In that
case the linker will see all non-static symbols of batman-adv and all other
non-static symbols of the kernel. This could lead to symbol collisions. A
prefix for the batman-adv symbols that defines their private namespace avoids
such a problem.

Reported-by: David Miller <davem@davemloft.net>
Signed-off-by: Sven Eckelmann <sven@narfation.org>

6 files changed, 43 insertions, 41 deletions

diff --git a/net/batman-adv/bat_sysfs.c b/net/batman-adv/bat_sysfs.c
index a8fb66095d83..5a7b042873e1 100644
--- a/net/batman-adv/bat_sysfs.c
+++ b/net/batman-adv/bat_sysfs.c
@@ -122,9 +122,10 @@ ssize_t store_##_name(struct kobject *kobj, struct attribute *attr,	\
                       char *buff, size_t count)                         \
 {                                                                       \
         struct net_device *net_dev = kobj_to_netdev(kobj);              \
-        struct hard_iface *hard_iface = hardif_get_by_netdev(net_dev);  \
+        struct hard_iface *hard_iface;                                  \
         ssize_t length;                                                 \
                                                                         \
+        hard_iface = batadv_hardif_get_by_netdev(net_dev);              \
         if (!hard_iface)                                                \
                 return 0;                                               \
                                                                         \
@@ -140,9 +141,10 @@ ssize_t show_##_name(struct kobject *kobj,				\
                      struct attribute *attr, char *buff)                \
 {                                                                       \
         struct net_device *net_dev = kobj_to_netdev(kobj);              \
-        struct hard_iface *hard_iface = hardif_get_by_netdev(net_dev);  \
+        struct hard_iface *hard_iface;                                  \
         ssize_t length;                                                 \
                                                                         \
+        hard_iface = batadv_hardif_get_by_netdev(net_dev);              \
         if (!hard_iface)                                                \
                 return 0;                                               \
                                                                         \
@@ -433,7 +435,7 @@ BAT_ATTR_SIF_BOOL(bonding, S_IRUGO | S_IWUSR, NULL);
 #ifdef CONFIG_BATMAN_ADV_BLA
 BAT_ATTR_SIF_BOOL(bridge_loop_avoidance, S_IRUGO | S_IWUSR, NULL);
 #endif
-BAT_ATTR_SIF_BOOL(fragmentation, S_IRUGO | S_IWUSR, update_min_mtu);
+BAT_ATTR_SIF_BOOL(fragmentation, S_IRUGO | S_IWUSR, batadv_update_min_mtu);
 BAT_ATTR_SIF_BOOL(ap_isolation, S_IRUGO | S_IWUSR, NULL);
 static BAT_ATTR(vis_mode, S_IRUGO | S_IWUSR, show_vis_mode, store_vis_mode);
 static BAT_ATTR(routing_algo, S_IRUGO, show_bat_algo, NULL);
@@ -523,7 +525,7 @@ static ssize_t show_mesh_iface(struct kobject *kobj, struct attribute *attr,
                                char *buff)
 {
         struct net_device *net_dev = kobj_to_netdev(kobj);
-        struct hard_iface *hard_iface = hardif_get_by_netdev(net_dev);
+        struct hard_iface *hard_iface = batadv_hardif_get_by_netdev(net_dev);
         ssize_t length;
 
         if (!hard_iface)
@@ -541,7 +543,7 @@ static ssize_t store_mesh_iface(struct kobject *kobj, struct attribute *attr,
                                 char *buff, size_t count)
 {
         struct net_device *net_dev = kobj_to_netdev(kobj);
-        struct hard_iface *hard_iface = hardif_get_by_netdev(net_dev);
+        struct hard_iface *hard_iface = batadv_hardif_get_by_netdev(net_dev);
         int status_tmp = -1;
         int ret = count;
 
@@ -576,15 +578,15 @@ static ssize_t store_mesh_iface(struct kobject *kobj, struct attribute *attr,
         }
 
         if (status_tmp == IF_NOT_IN_USE) {
-                hardif_disable_interface(hard_iface);
+                batadv_hardif_disable_interface(hard_iface);
                 goto unlock;
         }
 
         /* if the interface already is in use */
         if (hard_iface->if_status != IF_NOT_IN_USE)
-                hardif_disable_interface(hard_iface);
+                batadv_hardif_disable_interface(hard_iface);
 
-        ret = hardif_enable_interface(hard_iface, buff);
+        ret = batadv_hardif_enable_interface(hard_iface, buff);
 
 unlock:
         rtnl_unlock();
@@ -597,7 +599,7 @@ static ssize_t show_iface_status(struct kobject *kobj, struct attribute *attr,
                                  char *buff)
 {
         struct net_device *net_dev = kobj_to_netdev(kobj);
-        struct hard_iface *hard_iface = hardif_get_by_netdev(net_dev);
+        struct hard_iface *hard_iface = batadv_hardif_get_by_netdev(net_dev);
         ssize_t length;
 
         if (!hard_iface)
diff --git a/net/batman-adv/hard-interface.c b/net/batman-adv/hard-interface.c
index 1643e7fca6c6..4f44f049186f 100644
--- a/net/batman-adv/hard-interface.c
+++ b/net/batman-adv/hard-interface.c
@@ -32,7 +32,7 @@
 
 #include <linux/if_arp.h>
 
-void hardif_free_rcu(struct rcu_head *rcu)
+void batadv_hardif_free_rcu(struct rcu_head *rcu)
 {
         struct hard_iface *hard_iface;
 
@@ -41,7 +41,7 @@ void hardif_free_rcu(struct rcu_head *rcu)
         kfree(hard_iface);
 }
 
-struct hard_iface *hardif_get_by_netdev(const struct net_device *net_dev)
+struct hard_iface *batadv_hardif_get_by_netdev(const struct net_device *net_dev)
 {
         struct hard_iface *hard_iface;
 
@@ -180,7 +180,7 @@ static void check_known_mac_addr(const struct net_device *net_dev)
         rcu_read_unlock();
 }
 
-int hardif_min_mtu(struct net_device *soft_iface)
+int batadv_hardif_min_mtu(struct net_device *soft_iface)
 {
         const struct bat_priv *bat_priv = netdev_priv(soft_iface);
         const struct hard_iface *hard_iface;
@@ -209,11 +209,11 @@ out:
 }
 
 /* adjusts the MTU if a new interface with a smaller MTU appeared. */
-void update_min_mtu(struct net_device *soft_iface)
+void batadv_update_min_mtu(struct net_device *soft_iface)
 {
         int min_mtu;
 
-        min_mtu = hardif_min_mtu(soft_iface);
+        min_mtu = batadv_hardif_min_mtu(soft_iface);
         if (soft_iface->mtu != min_mtu)
                 soft_iface->mtu = min_mtu;
 }
@@ -242,7 +242,7 @@ static void hardif_activate_interface(struct hard_iface *hard_iface)
         bat_info(hard_iface->soft_iface, "Interface activated: %s\n",
                  hard_iface->net_dev->name);
 
-        update_min_mtu(hard_iface->soft_iface);
+        batadv_update_min_mtu(hard_iface->soft_iface);
 
 out:
         if (primary_if)
@@ -260,11 +260,11 @@ static void hardif_deactivate_interface(struct hard_iface *hard_iface)
         bat_info(hard_iface->soft_iface, "Interface deactivated: %s\n",
                  hard_iface->net_dev->name);
 
-        update_min_mtu(hard_iface->soft_iface);
+        batadv_update_min_mtu(hard_iface->soft_iface);
 }
 
-int hardif_enable_interface(struct hard_iface *hard_iface,
-                            const char *iface_name)
+int batadv_hardif_enable_interface(struct hard_iface *hard_iface,
+                                   const char *iface_name)
 {
         struct bat_priv *bat_priv;
         struct net_device *soft_iface;
@@ -357,7 +357,7 @@ err:
         return ret;
 }
 
-void hardif_disable_interface(struct hard_iface *hard_iface)
+void batadv_hardif_disable_interface(struct hard_iface *hard_iface)
 {
         struct bat_priv *bat_priv = netdev_priv(hard_iface->soft_iface);
         struct hard_iface *primary_if = NULL;
@@ -461,7 +461,7 @@ static void hardif_remove_interface(struct hard_iface *hard_iface)
 
         /* first deactivate interface */
         if (hard_iface->if_status != IF_NOT_IN_USE)
-                hardif_disable_interface(hard_iface);
+                batadv_hardif_disable_interface(hard_iface);
 
         if (hard_iface->if_status != IF_NOT_IN_USE)
                 return;
@@ -471,7 +471,7 @@ static void hardif_remove_interface(struct hard_iface *hard_iface)
         hardif_free_ref(hard_iface);
 }
 
-void hardif_remove_interfaces(void)
+void batadv_hardif_remove_interfaces(void)
 {
         struct hard_iface *hard_iface, *hard_iface_tmp;
 
@@ -488,7 +488,7 @@ static int hard_if_event(struct notifier_block *this,
                          unsigned long event, void *ptr)
 {
         struct net_device *net_dev = ptr;
-        struct hard_iface *hard_iface = hardif_get_by_netdev(net_dev);
+        struct hard_iface *hard_iface = batadv_hardif_get_by_netdev(net_dev);
         struct hard_iface *primary_if = NULL;
         struct bat_priv *bat_priv;
 
@@ -513,7 +513,7 @@ static int hard_if_event(struct notifier_block *this,
                 break;
         case NETDEV_CHANGEMTU:
                 if (hard_iface->soft_iface)
-                        update_min_mtu(hard_iface->soft_iface);
+                        batadv_update_min_mtu(hard_iface->soft_iface);
                 break;
         case NETDEV_CHANGEADDR:
                 if (hard_iface->if_status == IF_NOT_IN_USE)
@@ -545,7 +545,7 @@ out:
 
 /* This function returns true if the interface represented by ifindex is a
  * 802.11 wireless device */
-bool is_wifi_iface(int ifindex)
+bool batadv_is_wifi_iface(int ifindex)
 {
         struct net_device *net_device = NULL;
         bool ret = false;
@@ -573,6 +573,6 @@ out:
         return ret;
 }
 
-struct notifier_block hard_if_notifier = {
+struct notifier_block batadv_hard_if_notifier = {
         .notifier_call = hard_if_event,
 };
diff --git a/net/batman-adv/hard-interface.h b/net/batman-adv/hard-interface.h
index e68c5655e616..20e09db29d15 100644
--- a/net/batman-adv/hard-interface.h
+++ b/net/batman-adv/hard-interface.h
@@ -31,23 +31,23 @@ enum hard_if_state {
         IF_I_WANT_YOU
 };
 
-extern struct notifier_block hard_if_notifier;
+extern struct notifier_block batadv_hard_if_notifier;
 
 struct hard_iface*
-hardif_get_by_netdev(const struct net_device *net_dev);
-int hardif_enable_interface(struct hard_iface *hard_iface,
-                            const char *iface_name);
-void hardif_disable_interface(struct hard_iface *hard_iface);
-void hardif_remove_interfaces(void);
-int hardif_min_mtu(struct net_device *soft_iface);
-void update_min_mtu(struct net_device *soft_iface);
-void hardif_free_rcu(struct rcu_head *rcu);
-bool is_wifi_iface(int ifindex);
+batadv_hardif_get_by_netdev(const struct net_device *net_dev);
+int batadv_hardif_enable_interface(struct hard_iface *hard_iface,
+                                   const char *iface_name);
+void batadv_hardif_disable_interface(struct hard_iface *hard_iface);
+void batadv_hardif_remove_interfaces(void);
+int batadv_hardif_min_mtu(struct net_device *soft_iface);
+void batadv_update_min_mtu(struct net_device *soft_iface);
+void batadv_hardif_free_rcu(struct rcu_head *rcu);
+bool batadv_is_wifi_iface(int ifindex);
 
 static inline void hardif_free_ref(struct hard_iface *hard_iface)
 {
         if (atomic_dec_and_test(&hard_iface->refcount))
-                call_rcu(&hard_iface->rcu, hardif_free_rcu);
+                call_rcu(&hard_iface->rcu, batadv_hardif_free_rcu);
 }
 
 static inline struct hard_iface *primary_if_get_selected(
diff --git a/net/batman-adv/main.c b/net/batman-adv/main.c
index 8fe70b487b49..8e4083612523 100644
--- a/net/batman-adv/main.c
+++ b/net/batman-adv/main.c
@@ -68,7 +68,7 @@ static int __init batman_init(void)
         bat_socket_init();
         batadv_debugfs_init();
 
-        register_netdevice_notifier(&hard_if_notifier);
+        register_netdevice_notifier(&batadv_hard_if_notifier);
 
         pr_info("B.A.T.M.A.N. advanced %s (compatibility version %i) loaded\n",
                 SOURCE_VERSION, COMPAT_VERSION);
@@ -79,8 +79,8 @@ static int __init batman_init(void)
 static void __exit batman_exit(void)
 {
         batadv_debugfs_destroy();
-        unregister_netdevice_notifier(&hard_if_notifier);
-        hardif_remove_interfaces();
+        unregister_netdevice_notifier(&batadv_hard_if_notifier);
+        batadv_hardif_remove_interfaces();
 
         flush_workqueue(bat_event_workqueue);
         destroy_workqueue(bat_event_workqueue);
diff --git a/net/batman-adv/soft-interface.c b/net/batman-adv/soft-interface.c
index bfc4fe03cafa..5bf9a73ae799 100644
--- a/net/batman-adv/soft-interface.c
+++ b/net/batman-adv/soft-interface.c
@@ -122,7 +122,7 @@ static int interface_set_mac_addr(struct net_device *dev, void *p)
 static int interface_change_mtu(struct net_device *dev, int new_mtu)
 {
         /* check ranges */
-        if ((new_mtu < 68) || (new_mtu > hardif_min_mtu(dev)))
+        if ((new_mtu < 68) || (new_mtu > batadv_hardif_min_mtu(dev)))
                 return -EINVAL;
 
         dev->mtu = new_mtu;
diff --git a/net/batman-adv/translation-table.c b/net/batman-adv/translation-table.c
index bb8557ea30f1..7324b89bf731 100644
--- a/net/batman-adv/translation-table.c
+++ b/net/batman-adv/translation-table.c
@@ -221,7 +221,7 @@ void tt_local_add(struct net_device *soft_iface, const uint8_t *addr,
 
         memcpy(tt_local_entry->common.addr, addr, ETH_ALEN);
         tt_local_entry->common.flags = NO_FLAGS;
-        if (is_wifi_iface(ifindex))
+        if (batadv_is_wifi_iface(ifindex))
                 tt_local_entry->common.flags |= TT_CLIENT_WIFI;
         atomic_set(&tt_local_entry->common.refcount, 2);
         tt_local_entry->last_seen = jiffies;