diff options
Diffstat (limited to 'net/batman-adv/send.c')
-rw-r--r-- | net/batman-adv/send.c | 39 |
1 files changed, 25 insertions, 14 deletions
diff --git a/net/batman-adv/send.c b/net/batman-adv/send.c index 59e695b..3a10d87 100644 --- a/net/batman-adv/send.c +++ b/net/batman-adv/send.c @@ -20,10 +20,11 @@ #include <linux/atomic.h> #include <linux/byteorder/generic.h> +#include <linux/errno.h> #include <linux/etherdevice.h> #include <linux/fs.h> -#include <linux/if_ether.h> #include <linux/if.h> +#include <linux/if_ether.h> #include <linux/jiffies.h> #include <linux/kernel.h> #include <linux/kref.h> @@ -42,6 +43,7 @@ #include "fragmentation.h" #include "gateway_client.h" #include "hard-interface.h" +#include "log.h" #include "network-coding.h" #include "originator.h" #include "routing.h" @@ -71,6 +73,7 @@ int batadv_send_skb_packet(struct sk_buff *skb, { struct batadv_priv *bat_priv; struct ethhdr *ethhdr; + int ret; bat_priv = netdev_priv(hard_iface->soft_iface); @@ -108,8 +111,15 @@ int batadv_send_skb_packet(struct sk_buff *skb, /* dev_queue_xmit() returns a negative result on error. However on * congestion and traffic shaping, it drops and returns NET_XMIT_DROP * (which is > 0). This will not be treated as an error. + * + * a negative value cannot be returned because it could be interepreted + * as not consumed skb by callers of batadv_send_skb_to_orig. */ - return dev_queue_xmit(skb); + ret = dev_queue_xmit(skb); + if (ret < 0) + ret = NET_XMIT_DROP; + + return ret; send_skb_err: kfree_skb(skb); return NET_XMIT_DROP; @@ -155,8 +165,11 @@ int batadv_send_unicast_skb(struct sk_buff *skb, * host, NULL can be passed as recv_if and no interface alternating is * attempted. * - * Return: NET_XMIT_SUCCESS on success, NET_XMIT_DROP on failure, or - * -EINPROGRESS if the skb is buffered for later transmit. + * Return: -1 on failure (and the skb is not consumed), -EINPROGRESS if the + * skb is buffered for later transmit or the NET_XMIT status returned by the + * lower routine if the packet has been passed down. + * + * If the returning value is not -1 the skb has been consumed. */ int batadv_send_skb_to_orig(struct sk_buff *skb, struct batadv_orig_node *orig_node, @@ -164,7 +177,7 @@ int batadv_send_skb_to_orig(struct sk_buff *skb, { struct batadv_priv *bat_priv = orig_node->bat_priv; struct batadv_neigh_node *neigh_node; - int ret = NET_XMIT_DROP; + int ret = -1; /* batadv_find_router() increases neigh_nodes refcount if found. */ neigh_node = batadv_find_router(bat_priv, orig_node, recv_if); @@ -177,8 +190,7 @@ int batadv_send_skb_to_orig(struct sk_buff *skb, if (atomic_read(&bat_priv->fragmentation) && skb->len > neigh_node->if_incoming->net_dev->mtu) { /* Fragment and send packet. */ - if (batadv_frag_send_packet(skb, orig_node, neigh_node)) - ret = NET_XMIT_SUCCESS; + ret = batadv_frag_send_packet(skb, orig_node, neigh_node); goto out; } @@ -187,12 +199,10 @@ int batadv_send_skb_to_orig(struct sk_buff *skb, * (i.e. being forwarded). If the packet originates from this node or if * network coding fails, then send the packet as usual. */ - if (recv_if && batadv_nc_skb_forward(skb, neigh_node)) { + if (recv_if && batadv_nc_skb_forward(skb, neigh_node)) ret = -EINPROGRESS; - } else { - batadv_send_unicast_skb(skb, neigh_node); - ret = NET_XMIT_SUCCESS; - } + else + ret = batadv_send_unicast_skb(skb, neigh_node); out: if (neigh_node) @@ -318,7 +328,7 @@ int batadv_send_skb_unicast(struct batadv_priv *bat_priv, { struct batadv_unicast_packet *unicast_packet; struct ethhdr *ethhdr; - int ret = NET_XMIT_DROP; + int res, ret = NET_XMIT_DROP; if (!orig_node) goto out; @@ -355,7 +365,8 @@ int batadv_send_skb_unicast(struct batadv_priv *bat_priv, if (batadv_tt_global_client_is_roaming(bat_priv, ethhdr->h_dest, vid)) unicast_packet->ttvn = unicast_packet->ttvn - 1; - if (batadv_send_skb_to_orig(skb, orig_node, NULL) != NET_XMIT_DROP) + res = batadv_send_skb_to_orig(skb, orig_node, NULL); + if (res != -1) ret = NET_XMIT_SUCCESS; out: |