batman-adv: use ETH_HLEN instead of sizeof(struct ethhdr)

Instead of using sizeof(struct ethhdr) it is strongly recommended to use the
kernel macro ETH_HLEN. This patch substitute each occurrence of the former
expressione with the latter one.

Signed-off-by: Antonio Quartulli <ordex@autistici.org>

9 files changed, 21 insertions, 25 deletions

diff --git a/net/batman-adv/bat_iv_ogm.c b/net/batman-adv/bat_iv_ogm.c
index 98f71827c7b3..d7fa8afd7ff8 100644
--- a/net/batman-adv/bat_iv_ogm.c
+++ b/net/batman-adv/bat_iv_ogm.c
@@ -355,10 +355,9 @@ static void bat_iv_ogm_aggregate_new(const unsigned char *packet_buff,
         if ((atomic_read(&bat_priv->aggregated_ogms)) &&
             (packet_len < MAX_AGGREGATION_BYTES))
                 forw_packet_aggr->skb = dev_alloc_skb(MAX_AGGREGATION_BYTES +
-                                                      sizeof(struct ethhdr));
+                                                      ETH_HLEN);
         else
-                forw_packet_aggr->skb = dev_alloc_skb(packet_len +
-                                                      sizeof(struct ethhdr));
+                forw_packet_aggr->skb = dev_alloc_skb(packet_len + ETH_HLEN);
 
         if (!forw_packet_aggr->skb) {
                 if (!own_packet)
@@ -366,7 +365,7 @@ static void bat_iv_ogm_aggregate_new(const unsigned char *packet_buff,
                 kfree(forw_packet_aggr);
                 goto out;
         }
-        skb_reserve(forw_packet_aggr->skb, sizeof(struct ethhdr));
+        skb_reserve(forw_packet_aggr->skb, ETH_HLEN);
 
         INIT_HLIST_NODE(&forw_packet_aggr->list);
 
diff --git a/net/batman-adv/bridge_loop_avoidance.c b/net/batman-adv/bridge_loop_avoidance.c
index c8642b586411..ad394c6496cc 100644
--- a/net/batman-adv/bridge_loop_avoidance.c
+++ b/net/batman-adv/bridge_loop_avoidance.c
@@ -290,9 +290,7 @@ static void bla_send_claim(struct bat_priv *bat_priv, uint8_t *mac,
                 goto out;
 
         ethhdr = (struct ethhdr *)skb->data;
-        hw_src = (uint8_t *)ethhdr +
-                 sizeof(struct ethhdr) +
-                 sizeof(struct arphdr);
+        hw_src = (uint8_t *)ethhdr + ETH_HLEN + sizeof(struct arphdr);
 
         /* now we pretend that the client would have sent this ... */
         switch (claimtype) {
@@ -340,7 +338,7 @@ static void bla_send_claim(struct bat_priv *bat_priv, uint8_t *mac,
         skb_reset_mac_header(skb);
         skb->protocol = eth_type_trans(skb, soft_iface);
         bat_priv->stats.rx_packets++;
-        bat_priv->stats.rx_bytes += skb->len + sizeof(struct ethhdr);
+        bat_priv->stats.rx_bytes += skb->len + ETH_HLEN;
         soft_iface->last_rx = jiffies;
 
         netif_rx(skb);
@@ -844,7 +842,7 @@ static int bla_process_claim(struct bat_priv *bat_priv,
                 headlen = sizeof(*vhdr);
         } else {
                 proto = ntohs(ethhdr->h_proto);
-                headlen = sizeof(*ethhdr);
+                headlen = ETH_HLEN;
         }
 
         if (proto != ETH_P_ARP)
@@ -1302,7 +1300,7 @@ int bla_is_backbone_gw(struct sk_buff *skb,
                 return 0;
 
         /* first, find out the vid. */
-        if (!pskb_may_pull(skb, hdr_size + sizeof(struct ethhdr)))
+        if (!pskb_may_pull(skb, hdr_size + ETH_HLEN))
                 return 0;
 
         ethhdr = (struct ethhdr *)(((uint8_t *)skb->data) + hdr_size);
diff --git a/net/batman-adv/hard-interface.c b/net/batman-adv/hard-interface.c
index e8c5da379a80..47c79d724ba3 100644
--- a/net/batman-adv/hard-interface.c
+++ b/net/batman-adv/hard-interface.c
@@ -574,8 +574,7 @@ static int batman_skb_recv(struct sk_buff *skb, struct net_device *dev,
                 goto err_free;
 
         /* expect a valid ethernet header here. */
-        if (unlikely(skb->mac_len != sizeof(struct ethhdr) ||
-                     !skb_mac_header(skb)))
+        if (unlikely(skb->mac_len != ETH_HLEN || !skb_mac_header(skb)))
                 goto err_free;
 
         if (!hard_iface->soft_iface)
diff --git a/net/batman-adv/icmp_socket.c b/net/batman-adv/icmp_socket.c
index b87518edcef9..2e98a57f3407 100644
--- a/net/batman-adv/icmp_socket.c
+++ b/net/batman-adv/icmp_socket.c
@@ -175,13 +175,13 @@ static ssize_t bat_socket_write(struct file *file, const char __user *buff,
         if (len >= sizeof(struct icmp_packet_rr))
                 packet_len = sizeof(struct icmp_packet_rr);
 
-        skb = dev_alloc_skb(packet_len + sizeof(struct ethhdr));
+        skb = dev_alloc_skb(packet_len + ETH_HLEN);
         if (!skb) {
                 len = -ENOMEM;
                 goto out;
         }
 
-        skb_reserve(skb, sizeof(struct ethhdr));
+        skb_reserve(skb, ETH_HLEN);
         icmp_packet = (struct icmp_packet_rr *)skb_put(skb, packet_len);
 
         if (copy_from_user(icmp_packet, buff, packet_len)) {
diff --git a/net/batman-adv/routing.c b/net/batman-adv/routing.c
index ac13a6a7409d..ff560863bc74 100644
--- a/net/batman-adv/routing.c
+++ b/net/batman-adv/routing.c
@@ -313,7 +313,7 @@ static int recv_my_icmp_packet(struct bat_priv *bat_priv,
                 goto out;
 
         /* create a copy of the skb, if needed, to modify it. */
-        if (skb_cow(skb, sizeof(struct ethhdr)) < 0)
+        if (skb_cow(skb, ETH_HLEN) < 0)
                 goto out;
 
         icmp_packet = (struct icmp_packet_rr *)skb->data;
@@ -368,7 +368,7 @@ static int recv_icmp_ttl_exceeded(struct bat_priv *bat_priv,
                 goto out;
 
         /* create a copy of the skb, if needed, to modify it. */
-        if (skb_cow(skb, sizeof(struct ethhdr)) < 0)
+        if (skb_cow(skb, ETH_HLEN) < 0)
                 goto out;
 
         icmp_packet = (struct icmp_packet *)skb->data;
@@ -454,7 +454,7 @@ int recv_icmp_packet(struct sk_buff *skb, struct hard_iface *recv_if)
                 goto out;
 
         /* create a copy of the skb, if needed, to modify it. */
-        if (skb_cow(skb, sizeof(struct ethhdr)) < 0)
+        if (skb_cow(skb, ETH_HLEN) < 0)
                 goto out;
 
         icmp_packet = (struct icmp_packet_rr *)skb->data;
@@ -841,7 +841,7 @@ static int route_unicast_packet(struct sk_buff *skb, struct hard_iface *recv_if)
                 goto out;
 
         /* create a copy of the skb, if needed, to modify it. */
-        if (skb_cow(skb, sizeof(struct ethhdr)) < 0)
+        if (skb_cow(skb, ETH_HLEN) < 0)
                 goto out;
 
         unicast_packet = (struct unicast_packet *)skb->data;
diff --git a/net/batman-adv/send.c b/net/batman-adv/send.c
index b5f078cacc09..7c66b6121fa6 100644
--- a/net/batman-adv/send.c
+++ b/net/batman-adv/send.c
@@ -51,7 +51,7 @@ int send_skb_packet(struct sk_buff *skb, struct hard_iface *hard_iface,
         }
 
         /* push to the ethernet header. */
-        if (my_skb_head_push(skb, sizeof(*ethhdr)) < 0)
+        if (my_skb_head_push(skb, ETH_HLEN) < 0)
                 goto send_skb_err;
 
         skb_reset_mac_header(skb);
diff --git a/net/batman-adv/soft-interface.c b/net/batman-adv/soft-interface.c
index efe0fbaadcd6..6e2530b02043 100644
--- a/net/batman-adv/soft-interface.c
+++ b/net/batman-adv/soft-interface.c
@@ -292,7 +292,7 @@ void interface_rx(struct net_device *soft_iface,
 /*      skb->ip_summed = CHECKSUM_UNNECESSARY;*/
 
         bat_priv->stats.rx_packets++;
-        bat_priv->stats.rx_bytes += skb->len + sizeof(struct ethhdr);
+        bat_priv->stats.rx_bytes += skb->len + ETH_HLEN;
 
         soft_iface->last_rx = jiffies;
 
diff --git a/net/batman-adv/types.h b/net/batman-adv/types.h
index 4d93aad899f7..2f4848b776a7 100644
--- a/net/batman-adv/types.h
+++ b/net/batman-adv/types.h
@@ -27,7 +27,7 @@
 #include "packet.h"
 #include "bitarray.h"
 
-#define BAT_HEADER_LEN (sizeof(struct ethhdr) + \
+#define BAT_HEADER_LEN (ETH_HLEN + \
         ((sizeof(struct unicast_packet) > sizeof(struct bcast_packet) ? \
          sizeof(struct unicast_packet) : \
          sizeof(struct bcast_packet))))
diff --git a/net/batman-adv/vis.c b/net/batman-adv/vis.c
index c4a5b8cafada..cec216fb77c7 100644
--- a/net/batman-adv/vis.c
+++ b/net/batman-adv/vis.c
@@ -434,12 +434,12 @@ static struct vis_info *add_packet(struct bat_priv *bat_priv,
                 return NULL;
 
         info->skb_packet = dev_alloc_skb(sizeof(*packet) + vis_info_len +
-                                         sizeof(struct ethhdr));
+                                         ETH_HLEN);
         if (!info->skb_packet) {
                 kfree(info);
                 return NULL;
         }
-        skb_reserve(info->skb_packet, sizeof(struct ethhdr));
+        skb_reserve(info->skb_packet, ETH_HLEN);
         packet = (struct vis_packet *)skb_put(info->skb_packet, sizeof(*packet)
                                               + vis_info_len);
 
@@ -894,11 +894,11 @@ int vis_init(struct bat_priv *bat_priv)
 
         bat_priv->my_vis_info->skb_packet = dev_alloc_skb(sizeof(*packet) +
                                                           MAX_VIS_PACKET_SIZE +
-                                                         sizeof(struct ethhdr));
+                                                          ETH_HLEN);
         if (!bat_priv->my_vis_info->skb_packet)
                 goto free_info;
 
-        skb_reserve(bat_priv->my_vis_info->skb_packet, sizeof(struct ethhdr));
+        skb_reserve(bat_priv->my_vis_info->skb_packet, ETH_HLEN);
         packet = (struct vis_packet *)skb_put(bat_priv->my_vis_info->skb_packet,
                                               sizeof(*packet));