batman-adv: privatize forw_packet skb assignment
An skb is assigned to a forw_packet only once, shortly after the
forw_packet allocation.
With this patch the assignment is moved into the this allocation
function.
Signed-off-by: Linus Lüssing <linus.luessing@c0d3.blue>
Signed-off-by: Sven Eckelmann <sven@narfation.org>
Signed-off-by: Simon Wunderlich <sw@simonwunderlich.de>
diff --git a/net/batman-adv/send.c b/net/batman-adv/send.c
index 1489ec2..7bf4702 100644
--- a/net/batman-adv/send.c
+++ b/net/batman-adv/send.c
@@ -482,6 +482,7 @@ void batadv_forw_packet_free(struct batadv_forw_packet *forw_packet,
* @if_outgoing: The (optional) if_outgoing to be grabbed
* @queue_left: The (optional) queue counter to decrease
* @bat_priv: The bat_priv for the mesh of this forw_packet
+ * @skb: The raw packet this forwarding packet shall contain
*
* Allocates a forwarding packet and tries to get a reference to the
* (optional) if_incoming, if_outgoing and queue_left. If queue_left
@@ -493,7 +494,8 @@ struct batadv_forw_packet *
batadv_forw_packet_alloc(struct batadv_hard_iface *if_incoming,
struct batadv_hard_iface *if_outgoing,
atomic_t *queue_left,
- struct batadv_priv *bat_priv)
+ struct batadv_priv *bat_priv,
+ struct sk_buff *skb)
{
struct batadv_forw_packet *forw_packet;
const char *qname;
@@ -525,7 +527,7 @@ batadv_forw_packet_alloc(struct batadv_hard_iface *if_incoming,
INIT_HLIST_NODE(&forw_packet->list);
INIT_HLIST_NODE(&forw_packet->cleanup_list);
- forw_packet->skb = NULL;
+ forw_packet->skb = skb;
forw_packet->queue_left = queue_left;
forw_packet->if_incoming = if_incoming;
forw_packet->if_outgoing = if_outgoing;
@@ -756,22 +758,23 @@ int batadv_add_bcast_packet_to_list(struct batadv_priv *bat_priv,
if (!primary_if)
goto err;
+ newskb = skb_copy(skb, GFP_ATOMIC);
+ if (!newskb) {
+ batadv_hardif_put(primary_if);
+ goto err;
+ }
+
forw_packet = batadv_forw_packet_alloc(primary_if, NULL,
&bat_priv->bcast_queue_left,
- bat_priv);
+ bat_priv, newskb);
batadv_hardif_put(primary_if);
if (!forw_packet)
- goto err;
-
- newskb = skb_copy(skb, GFP_ATOMIC);
- if (!newskb)
goto err_packet_free;
/* as we have a copy now, it is safe to decrease the TTL */
bcast_packet = (struct batadv_bcast_packet *)newskb->data;
bcast_packet->ttl--;
- forw_packet->skb = newskb;
forw_packet->own = own_packet;
INIT_DELAYED_WORK(&forw_packet->delayed_work,
@@ -781,7 +784,7 @@ int batadv_add_bcast_packet_to_list(struct batadv_priv *bat_priv,
return NETDEV_TX_OK;
err_packet_free:
- batadv_forw_packet_free(forw_packet, true);
+ kfree_skb(newskb);
err:
return NETDEV_TX_BUSY;
}