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tipc: avoid unnecessary lookup for tipc bearer instance

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tipc_block_bearer() currently takes a bearer name (const char*)
as argument. This requires the function to make a lookup to find
the pointer to the corresponding bearer struct. In the current
code base this is not necessary, since the only two callers
(tipc_continue(),recv_notification()) already have validated
copies of this pointer, and hence can pass it directly in the
function call.

We change tipc_block_bearer() to directly take struct tipc_bearer*
as argument instead.

Signed-off-by: Ying Xue <ying.xue@windriver.com>
Reviewed-by: Paul Gortmaker <paul.gortmaker@windriver.com>
Signed-off-by: Jon Maloy <jon.maloy@ericsson.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Ying Xue 2013-10-18 07:23:18 +02:00 committed by David S. Miller
parent 4babbaa8a1
commit f2875c3cc4
4 changed files with 10 additions and 18 deletions
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14
net/tipc/bearer.c
View File

@ -420,23 +420,15 @@ exit:
}
/**
* tipc_block_bearer - Block the bearer with the given name, and reset all its links
* tipc_block_bearer - Block the bearer, and reset all its links
*/
int tipc_block_bearer(const char *name)
int tipc_block_bearer(struct tipc_bearer *b_ptr)
{
struct tipc_bearer *b_ptr = NULL;
struct tipc_link *l_ptr;
struct tipc_link *temp_l_ptr;
read_lock_bh(&tipc_net_lock);
b_ptr = tipc_bearer_find(name);
if (!b_ptr) {
pr_warn("Attempt to block unknown bearer <%s>\n", name);
read_unlock_bh(&tipc_net_lock);
return -EINVAL;
}
pr_info("Blocking bearer <%s>\n", name);
pr_info("Blocking bearer <%s>\n", b_ptr->name);
spin_lock_bh(&b_ptr->lock);
b_ptr->blocked = 1;
list_for_each_entry_safe(l_ptr, temp_l_ptr, &b_ptr->links, link_list) {

2
net/tipc/bearer.h
View File

@ -163,7 +163,7 @@ int tipc_register_media(struct tipc_media *m_ptr);
void tipc_recv_msg(struct sk_buff *buf, struct tipc_bearer *tb_ptr);
int tipc_block_bearer(const char *name);
int tipc_block_bearer(struct tipc_bearer *b_ptr);
void tipc_continue(struct tipc_bearer *tb_ptr);
int tipc_enable_bearer(const char *bearer_name, u32 disc_domain, u32 priority);

6
net/tipc/eth_media.c
View File

@ -265,17 +265,17 @@ static int recv_notification(struct notifier_block *nb, unsigned long evt,
if (netif_carrier_ok(dev))
tipc_continue(eb_ptr->bearer);
else
tipc_block_bearer(eb_ptr->bearer->name);
tipc_block_bearer(eb_ptr->bearer);
break;
case NETDEV_UP:
tipc_continue(eb_ptr->bearer);
break;
case NETDEV_DOWN:
tipc_block_bearer(eb_ptr->bearer->name);
tipc_block_bearer(eb_ptr->bearer);
break;
case NETDEV_CHANGEMTU:
case NETDEV_CHANGEADDR:
tipc_block_bearer(eb_ptr->bearer->name);
tipc_block_bearer(eb_ptr->bearer);
tipc_continue(eb_ptr->bearer);
break;
case NETDEV_UNREGISTER:

6
net/tipc/ib_media.c
View File

@ -258,17 +258,17 @@ static int recv_notification(struct notifier_block *nb, unsigned long evt,
if (netif_carrier_ok(dev))
tipc_continue(ib_ptr->bearer);
else
tipc_block_bearer(ib_ptr->bearer->name);
tipc_block_bearer(ib_ptr->bearer);
break;
case NETDEV_UP:
tipc_continue(ib_ptr->bearer);
break;
case NETDEV_DOWN:
tipc_block_bearer(ib_ptr->bearer->name);
tipc_block_bearer(ib_ptr->bearer);
break;
case NETDEV_CHANGEMTU:
case NETDEV_CHANGEADDR:
tipc_block_bearer(ib_ptr->bearer->name);
tipc_block_bearer(ib_ptr->bearer);
tipc_continue(ib_ptr->bearer);
break;
case NETDEV_UNREGISTER: