From: Antonio Quartulli antonio@open-mesh.com
Changes that are going to be introduced later will need to perform other checks on the incoming net_device struct.
To avoid performing the dev_get_by_index() each and every time, it is better to move it outside of the is_wifi_iface() function and then pass the obtained pointer to all the checking routines.
Signed-off-by: Antonio Quartulli antonio@open-mesh.com --- hard-interface.c | 33 ++++----------------------------- hard-interface.h | 2 +- translation-table.c | 8 +++++++- 3 files changed, 12 insertions(+), 31 deletions(-)
diff --git a/hard-interface.c b/hard-interface.c index c343aa8..179f74a 100644 --- a/hard-interface.c +++ b/hard-interface.c @@ -124,8 +124,11 @@ static int batadv_is_valid_iface(const struct net_device *net_dev) * * Returns true if the net device is a 802.11 wireless device, false otherwise. */ -static bool batadv_is_wifi_netdev(struct net_device *net_device) +bool batadv_is_wifi_netdev(struct net_device *net_device) { + if (!net_device) + return false; + #ifdef CONFIG_WIRELESS_EXT /* pre-cfg80211 drivers have to implement WEXT, so it is possible to * check for wireless_handlers != NULL @@ -141,34 +144,6 @@ static bool batadv_is_wifi_netdev(struct net_device *net_device) return false; }
-/** - * batadv_is_wifi_iface - check if the given interface represented by ifindex - * is a wifi interface - * @ifindex: interface index to check - * - * Returns true if the interface represented by ifindex is a 802.11 wireless - * device, false otherwise. - */ -bool batadv_is_wifi_iface(int ifindex) -{ - struct net_device *net_device = NULL; - bool ret = false; - - if (ifindex == BATADV_NULL_IFINDEX) - goto out; - - net_device = dev_get_by_index(&init_net, ifindex); - if (!net_device) - goto out; - - ret = batadv_is_wifi_netdev(net_device); - -out: - if (net_device) - dev_put(net_device); - return ret; -} - static struct batadv_hard_iface * batadv_hardif_get_active(const struct net_device *soft_iface) { diff --git a/hard-interface.h b/hard-interface.h index 4989288..2d3488a 100644 --- a/hard-interface.h +++ b/hard-interface.h @@ -51,7 +51,7 @@ 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); +bool batadv_is_wifi_netdev(struct net_device *net_device);
static inline void batadv_hardif_free_ref(struct batadv_hard_iface *hard_iface) diff --git a/translation-table.c b/translation-table.c index 87c4a44..0543b1a 100644 --- a/translation-table.c +++ b/translation-table.c @@ -346,11 +346,15 @@ void batadv_tt_local_add(struct net_device *soft_iface, const uint8_t *addr, struct batadv_priv *bat_priv = netdev_priv(soft_iface); struct batadv_tt_local_entry *tt_local; struct batadv_tt_global_entry *tt_global; + struct net_device *in_dev = NULL; struct hlist_head *head; struct batadv_tt_orig_list_entry *orig_entry; int hash_added; bool roamed_back = false;
+ if (ifindex != BATADV_NULL_IFINDEX) + in_dev = dev_get_by_index(&init_net, ifindex); + tt_local = batadv_tt_local_hash_find(bat_priv, addr, vid); tt_global = batadv_tt_global_hash_find(bat_priv, addr, vid);
@@ -400,7 +404,7 @@ void batadv_tt_local_add(struct net_device *soft_iface, const uint8_t *addr, */ tt_local->common.flags = BATADV_TT_CLIENT_NEW; tt_local->common.vid = vid; - if (batadv_is_wifi_iface(ifindex)) + if (batadv_is_wifi_netdev(in_dev)) tt_local->common.flags |= BATADV_TT_CLIENT_WIFI; atomic_set(&tt_local->common.refcount, 2); tt_local->last_seen = jiffies; @@ -451,6 +455,8 @@ check_roaming: }
out: + if (in_dev) + dev_put(in_dev); if (tt_local) batadv_tt_local_entry_free_ref(tt_local); if (tt_global)