diff options
Diffstat (limited to 'drivers/staging/batman-adv/soft-interface.c')
| -rw-r--r-- | drivers/staging/batman-adv/soft-interface.c | 76 |
1 files changed, 38 insertions, 38 deletions
diff --git a/drivers/staging/batman-adv/soft-interface.c b/drivers/staging/batman-adv/soft-interface.c index 168a4e195a1..8ae3483a625 100644 --- a/drivers/staging/batman-adv/soft-interface.c +++ b/drivers/staging/batman-adv/soft-interface.c @@ -34,7 +34,6 @@ static uint16_t bcast_seqno = 1; /* give own bcast messages seq numbers to avoid * broadcast storms */ static int32_t skb_packets; static int32_t skb_bad_packets; -static int32_t lock_dropped; unsigned char mainIfAddr[ETH_ALEN]; static unsigned char mainIfAddr_default[ETH_ALEN]; @@ -67,12 +66,12 @@ int main_if_was_up(void) return (memcmp(mainIfAddr, mainIfAddr_default, ETH_ALEN) != 0 ? 1 : 0); } -static int my_skb_push(struct sk_buff *skb, unsigned int len) +int my_skb_push(struct sk_buff *skb, unsigned int len) { int result = 0; skb_packets++; - if (skb->data - len < skb->head) { + if (skb_headroom(skb) < len) { skb_bad_packets++; result = pskb_expand_head(skb, len, 0, GFP_ATOMIC); @@ -169,7 +168,10 @@ int interface_tx(struct sk_buff *skb, struct net_device *dev) struct orig_node *orig_node; struct ethhdr *ethhdr = (struct ethhdr *)skb->data; struct bat_priv *priv = netdev_priv(dev); + struct batman_if *batman_if; + uint8_t dstaddr[6]; int data_len = skb->len; + unsigned long flags; if (atomic_read(&module_state) != MODULE_ACTIVE) goto dropped; @@ -185,7 +187,6 @@ int interface_tx(struct sk_buff *skb, struct net_device *dev) goto dropped; bcast_packet = (struct bcast_packet *)skb->data; - bcast_packet->version = COMPAT_VERSION; /* batman packet type: broadcast */ @@ -194,27 +195,21 @@ int interface_tx(struct sk_buff *skb, struct net_device *dev) /* hw address of first interface is the orig mac because only * this mac is known throughout the mesh */ memcpy(bcast_packet->orig, mainIfAddr, ETH_ALEN); + /* set broadcast sequence number */ bcast_packet->seqno = htons(bcast_seqno); bcast_seqno++; /* broadcast packet */ - add_bcast_packet_to_list(skb->data, skb->len); + add_bcast_packet_to_list(skb); + /* a copy is stored in the bcast list, therefore removing + * the original skb. */ + kfree_skb(skb); /* unicast packet */ } else { - - /* simply spin_lock()ing can deadlock when the lock is already - * hold. */ - /* TODO: defer the work in a working queue instead of - * dropping */ - if (!spin_trylock(&orig_hash_lock)) { - lock_dropped++; - printk(KERN_WARNING "batman-adv:%d packets dropped because lock was hold\n", lock_dropped); - goto dropped; - } - + spin_lock_irqsave(&orig_hash_lock, flags); /* get routing information */ orig_node = ((struct orig_node *)hash_find(orig_hash, ethhdr->h_dest)); @@ -243,14 +238,17 @@ int interface_tx(struct sk_buff *skb, struct net_device *dev) if (orig_node->batman_if->if_active != IF_ACTIVE) goto unlock; - send_raw_packet(skb->data, skb->len, - orig_node->batman_if, - orig_node->router->addr); + /* don't lock while sending the packets ... we therefore + * copy the required data before sending */ + + batman_if = orig_node->batman_if; + memcpy(dstaddr, orig_node->router->addr, ETH_ALEN); + spin_unlock_irqrestore(&orig_hash_lock, flags); + + send_skb_packet(skb, batman_if, dstaddr); } else { goto unlock; } - - spin_unlock(&orig_hash_lock); } priv->stats.tx_packets++; @@ -258,42 +256,44 @@ int interface_tx(struct sk_buff *skb, struct net_device *dev) goto end; unlock: - spin_unlock(&orig_hash_lock); + spin_unlock_irqrestore(&orig_hash_lock, flags); dropped: priv->stats.tx_dropped++; end: - kfree_skb(skb); return 0; } -void interface_rx(struct net_device *dev, void *packet, int packet_len) +void interface_rx(struct sk_buff *skb, int hdr_size) { - struct sk_buff *skb; + struct net_device *dev = soft_device; struct bat_priv *priv = netdev_priv(dev); - skb = dev_alloc_skb(packet_len); - - if (!skb) { - priv->stats.rx_dropped++; - goto out; + /* check if enough space is available for pulling, and pull */ + if (!pskb_may_pull(skb, hdr_size)) { + kfree_skb(skb); + return; } + skb_pull_rcsum(skb, hdr_size); +/* skb_set_mac_header(skb, -sizeof(struct ethhdr));*/ - memcpy(skb_put(skb, packet_len), packet, packet_len); - - /* Write metadata, and then pass to the receive level */ skb->dev = dev; skb->protocol = eth_type_trans(skb, dev); - skb->ip_summed = CHECKSUM_UNNECESSARY; + + /* should not be neccesary anymore as we use skb_pull_rcsum() + * TODO: please verify this and remove this TODO + * -- Dec 21st 2009, Simon Wunderlich */ + +/* skb->ip_summed = CHECKSUM_UNNECESSARY;*/ + + /* TODO: set skb->pkt_type to PACKET_BROADCAST, PACKET_MULTICAST, + * PACKET_OTHERHOST or PACKET_HOST */ priv->stats.rx_packets++; - priv->stats.rx_bytes += packet_len; + priv->stats.rx_bytes += skb->len; dev->last_rx = jiffies; netif_rx(skb); - -out: - return; } /* ethtool */ |