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authorPaul Gortmaker <paul.gortmaker@windriver.com>2010-09-08 13:31:24 +0000
committerDavid S. Miller <davem@davemloft.net>2010-09-09 21:34:14 -0700
commitb2abd4c033c3965ce670841dfb401f5f166222d5 (patch)
tree4dc7d0ac0f24001a95a9842a9c58468a343b4e08
parentfb621bac21fc315af9f66a754b7abe26ded3f260 (diff)
downloadlinux-b2abd4c033c3965ce670841dfb401f5f166222d5.tar.bz2
tipc: Optimize handling excess content on incoming messages
Remove code that trimmed excess trailing info from incoming messages arriving over an Ethernet interface. TIPC now ignores the extra info while the message is being processed by the node, and only trims it off if the message is retransmitted to another node. (This latter step is done to ensure the extra info doesn't cause the sk_buff to exceed the outgoing interface's MTU limit.) The outgoing buffer is guaranteed to be linear. Signed-off-by: Allan Stephens <allan.stephens@windriver.com> Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com> Signed-off-by: David S. Miller <davem@davemloft.net>
-rw-r--r--net/tipc/eth_media.c13
-rw-r--r--net/tipc/net.c1
2 files changed, 4 insertions, 10 deletions
diff --git a/net/tipc/eth_media.c b/net/tipc/eth_media.c
index 673fdf0b3222..6e988ba485fd 100644
--- a/net/tipc/eth_media.c
+++ b/net/tipc/eth_media.c
@@ -101,15 +101,12 @@ static int send_msg(struct sk_buff *buf, struct tipc_bearer *tb_ptr,
* Accept only packets explicitly sent to this node, or broadcast packets;
* ignores packets sent using Ethernet multicast, and traffic sent to other
* nodes (which can happen if interface is running in promiscuous mode).
- * Routine truncates any Ethernet padding/CRC appended to the message,
- * and ensures message size matches actual length
*/
static int recv_msg(struct sk_buff *buf, struct net_device *dev,
struct packet_type *pt, struct net_device *orig_dev)
{
struct eth_bearer *eb_ptr = (struct eth_bearer *)pt->af_packet_priv;
- u32 size;
if (!net_eq(dev_net(dev), &init_net)) {
kfree_skb(buf);
@@ -118,13 +115,9 @@ static int recv_msg(struct sk_buff *buf, struct net_device *dev,
if (likely(eb_ptr->bearer)) {
if (likely(buf->pkt_type <= PACKET_BROADCAST)) {
- size = msg_size((struct tipc_msg *)buf->data);
- skb_trim(buf, size);
- if (likely(buf->len == size)) {
- buf->next = NULL;
- tipc_recv_msg(buf, eb_ptr->bearer);
- return 0;
- }
+ buf->next = NULL;
+ tipc_recv_msg(buf, eb_ptr->bearer);
+ return 0;
}
}
kfree_skb(buf);
diff --git a/net/tipc/net.c b/net/tipc/net.c
index f61b7694138b..7e05af47a196 100644
--- a/net/tipc/net.c
+++ b/net/tipc/net.c
@@ -248,6 +248,7 @@ void tipc_net_route_msg(struct sk_buff *buf)
/* Handle message for another node */
msg_dbg(msg, "NET>SEND>: ");
+ skb_trim(buf, msg_size(msg));
tipc_link_send(buf, dnode, msg_link_selector(msg));
}