tipc: let neighbor discoverer tranmsit consumable buffers
The neighbor discovery function currently uses the function
tipc_bearer_send() for transmitting packets, assuming that the
sent buffers are not consumed by the called function.
We want to change this, in order to avoid unnecessary buffer cloning
elswhere in the code.
This commit introduces a new function tipc_bearer_skb() which consumes
the sent buffers, and let the discoverer functions use this new call
instead. The discoverer does now itself perform the cloning when
that is necessary.
Signed-off-by: Jon Maloy <jon.maloy@ericsson.com>
Reviewed-by: Ying Xue <ying.xue@windriver.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/tipc/discover.c b/net/tipc/discover.c
index 6cd36f9..afe8c47 100644
--- a/net/tipc/discover.c
+++ b/net/tipc/discover.c
@@ -167,11 +167,10 @@
/* Send response, if necessary */
if (respond && (mtyp == DSC_REQ_MSG)) {
rskb = tipc_buf_acquire(MAX_H_SIZE);
- if (rskb) {
- tipc_disc_init_msg(net, rskb, DSC_RESP_MSG, bearer);
- tipc_bearer_send(net, bearer->identity, rskb, &maddr);
- kfree_skb(rskb);
- }
+ if (!rskb)
+ return;
+ tipc_disc_init_msg(net, rskb, DSC_RESP_MSG, bearer);
+ tipc_bearer_xmit_skb(net, bearer->identity, rskb, &maddr);
}
}
@@ -225,6 +224,7 @@
static void disc_timeout(unsigned long data)
{
struct tipc_link_req *req = (struct tipc_link_req *)data;
+ struct sk_buff *skb;
int max_delay;
spin_lock_bh(&req->lock);
@@ -242,9 +242,9 @@
* hold at fast polling rate if don't have any associated nodes,
* otherwise hold at slow polling rate
*/
- tipc_bearer_send(req->net, req->bearer_id, req->buf, &req->dest);
-
-
+ skb = skb_clone(req->buf, GFP_ATOMIC);
+ if (skb)
+ tipc_bearer_xmit_skb(req->net, req->bearer_id, skb, &req->dest);
req->timer_intv *= 2;
if (req->num_nodes)
max_delay = TIPC_LINK_REQ_SLOW;
@@ -271,6 +271,7 @@
struct tipc_media_addr *dest)
{
struct tipc_link_req *req;
+ struct sk_buff *skb;
req = kmalloc(sizeof(*req), GFP_ATOMIC);
if (!req)
@@ -292,7 +293,9 @@
setup_timer(&req->timer, disc_timeout, (unsigned long)req);
mod_timer(&req->timer, jiffies + req->timer_intv);
b_ptr->link_req = req;
- tipc_bearer_send(net, req->bearer_id, req->buf, &req->dest);
+ skb = skb_clone(req->buf, GFP_ATOMIC);
+ if (skb)
+ tipc_bearer_xmit_skb(net, req->bearer_id, skb, &req->dest);
return 0;
}
@@ -316,6 +319,7 @@
void tipc_disc_reset(struct net *net, struct tipc_bearer *b_ptr)
{
struct tipc_link_req *req = b_ptr->link_req;
+ struct sk_buff *skb;
spin_lock_bh(&req->lock);
tipc_disc_init_msg(net, req->buf, DSC_REQ_MSG, b_ptr);
@@ -325,6 +329,8 @@
req->num_nodes = 0;
req->timer_intv = TIPC_LINK_REQ_INIT;
mod_timer(&req->timer, jiffies + req->timer_intv);
- tipc_bearer_send(net, req->bearer_id, req->buf, &req->dest);
+ skb = skb_clone(req->buf, GFP_ATOMIC);
+ if (skb)
+ tipc_bearer_xmit_skb(net, req->bearer_id, skb, &req->dest);
spin_unlock_bh(&req->lock);
}