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tipc: Minor optimizations to received message processing 

This patch enhances TIPC's handler for incoming messages in two
ways:
- the trivial, single-use routine for processing non-sequenced
  messages has been merged into the main handler
- the interface that received a message is now identified without
  having to access and/or modify the associated sk_buff

Signed-off-by: Allan Stephens <allan.stephens@windriver.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Allan Stephens 2008-06-04 17:32:35 -07:00 committed by David S. Miller
parent a686e6859e
commit 1265a02108
3 changed files with 8 additions and 25 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
net/tipc/discover.c
View File

@ -156,11 +156,11 @@ static void disc_dupl_alert(struct bearer *b_ptr, u32 node_addr,
/**
* tipc_disc_recv_msg - handle incoming link setup message (request or response)
* @buf: buffer containing message
* @b_ptr: bearer that message arrived on
*/
void tipc_disc_recv_msg(struct sk_buff *buf)
void tipc_disc_recv_msg(struct sk_buff *buf, struct bearer *b_ptr)
{
struct bearer *b_ptr = (struct bearer *)TIPC_SKB_CB(buf)->handle;
struct link *link;
struct tipc_media_addr media_addr;
struct tipc_msg *msg = buf_msg(buf);

2
net/tipc/discover.h
View File

@ -48,7 +48,7 @@ struct link_req *tipc_disc_init_link_req(struct bearer *b_ptr,
void tipc_disc_update_link_req(struct link_req *req);
void tipc_disc_stop_link_req(struct link_req *req);
void tipc_disc_recv_msg(struct sk_buff *buf);
void tipc_disc_recv_msg(struct sk_buff *buf, struct bearer *b_ptr);
void tipc_disc_link_event(u32 addr, char *name, int up);
#if 0

27
net/tipc/link.c
View File

@ -1766,21 +1766,6 @@ void tipc_link_retransmit(struct link *l_ptr, struct sk_buff *buf,
l_ptr->retransm_queue_head = l_ptr->retransm_queue_size = 0;
}
/*
* link_recv_non_seq: Receive packets which are outside
* the link sequence flow
*/
static void link_recv_non_seq(struct sk_buff *buf)
{
struct tipc_msg *msg = buf_msg(buf);
if (msg_user(msg) == LINK_CONFIG)
tipc_disc_recv_msg(buf);
else
tipc_bclink_recv_pkt(buf);
}
/**
* link_insert_deferred_queue - insert deferred messages back into receive chain
*/
@ -1857,7 +1842,7 @@ void tipc_recv_msg(struct sk_buff *head, struct tipc_bearer *tb_ptr)
{
read_lock_bh(&tipc_net_lock);
while (head) {
struct bearer *b_ptr;
struct bearer *b_ptr = (struct bearer *)tb_ptr;
struct node *n_ptr;
struct link *l_ptr;
struct sk_buff *crs;
@ -1868,9 +1853,6 @@ void tipc_recv_msg(struct sk_buff *head, struct tipc_bearer *tb_ptr)
u32 released = 0;
int type;
b_ptr = (struct bearer *)tb_ptr;
TIPC_SKB_CB(buf)->handle = b_ptr;
head = head->next;
/* Ensure message is well-formed */
@ -1889,7 +1871,10 @@ void tipc_recv_msg(struct sk_buff *head, struct tipc_bearer *tb_ptr)
msg = buf_msg(buf);
if (unlikely(msg_non_seq(msg))) {
link_recv_non_seq(buf);
if (msg_user(msg) == LINK_CONFIG)
tipc_disc_recv_msg(buf, b_ptr);
else
tipc_bclink_recv_pkt(buf);
continue;
}
@ -1996,8 +1981,6 @@ deliver:
if (link_recv_changeover_msg(&l_ptr, &buf)) {
msg = buf_msg(buf);
seq_no = msg_seqno(msg);
TIPC_SKB_CB(buf)->handle
= b_ptr;
if (type == ORIGINAL_MSG)
goto deliver;
goto protocol_check;