From b2abd4c033c3965ce670841dfb401f5f166222d5 Mon Sep 17 00:00:00 2001 From: Paul Gortmaker Date: Wed, 8 Sep 2010 13:31:24 +0000 Subject: 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 Signed-off-by: Paul Gortmaker Signed-off-by: David S. Miller --- net/tipc/eth_media.c | 13 +++---------- net/tipc/net.c | 1 + 2 files changed, 4 insertions(+), 10 deletions(-) (limited to 'net') diff --git a/net/tipc/eth_media.c b/net/tipc/eth_media.c index 673fdf0b322..6e988ba485f 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 f61b7694138..7e05af47a19 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)); } -- cgit v1.2.3-70-g09d2