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[XFRM] IPV6: Optimize xfrm6_input_addr().

Browse Source 
| % size old/net/ipv6/xfrm6_input.o new/net/ipv6/xfrm6_input.o
|    text	   data	    bss	    dec	    hex	filename
|    1026	      0	      0	   1026	    402	old/net/ipv6/xfrm6_input.o
|     947	      0	      0	    947	    3b3	new/net/ipv6/xfrm6_input.o

Signed-off-by: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org>
This commit is contained in:
YOSHIFUJI Hideaki 2008-02-19 17:24:33 +09:00
parent 3b6cdf94cd
commit a002c6fd71
1 changed files with 14 additions and 41 deletions
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57
net/ipv6/xfrm6_input.c
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@ -59,9 +59,6 @@ int xfrm6_input_addr(struct sk_buff *skb, xfrm_address_t *daddr,
xfrm_address_t *saddr, u8 proto)
{
struct xfrm_state *x = NULL;
int wildcard = 0;
xfrm_address_t *xany;
int nh = 0;
int i = 0;
/* Allocate new secpath or COW existing one. */
@ -83,10 +80,9 @@ int xfrm6_input_addr(struct sk_buff *skb, xfrm_address_t *daddr,
goto drop;
}
xany = (xfrm_address_t *)&in6addr_any;
for (i = 0; i < 3; i++) {
xfrm_address_t *dst, *src;
switch (i) {
case 0:
dst = daddr;
@ -94,16 +90,13 @@ int xfrm6_input_addr(struct sk_buff *skb, xfrm_address_t *daddr,
break;
case 1:
/* lookup state with wild-card source address */
wildcard = 1;
dst = daddr;
src = xany;
src = (xfrm_address_t *)&in6addr_any;
break;
case 2:
default:
/* lookup state with wild-card addresses */
wildcard = 1; /* XXX */
dst = xany;
src = xany;
dst = (xfrm_address_t *)&in6addr_any;
src = (xfrm_address_t *)&in6addr_any;
break;
}
@ -113,40 +106,20 @@ int xfrm6_input_addr(struct sk_buff *skb, xfrm_address_t *daddr,
spin_lock(&x->lock);
if (wildcard) {
if ((x->props.flags & XFRM_STATE_WILDRECV) == 0) {
if ((!i || (x->props.flags & XFRM_STATE_WILDRECV)) &&
likely(x->km.state == XFRM_STATE_VALID) &&
!xfrm_state_check_expire(x)) {
spin_unlock(&x->lock);
xfrm_state_put(x);
x = NULL;
continue;
}
}
if (unlikely(x->km.state != XFRM_STATE_VALID)) {
spin_unlock(&x->lock);
xfrm_state_put(x);
x = NULL;
continue;
}
if (xfrm_state_check_expire(x)) {
spin_unlock(&x->lock);
xfrm_state_put(x);
x = NULL;
continue;
}
spin_unlock(&x->lock);
nh = x->type->input(x, skb);
if (nh <= 0) {
xfrm_state_put(x);
x = NULL;
continue;
}
/* Found a state */
if (x->type->input(x, skb) > 0) {
/* found a valid state */
break;
}
} else
spin_unlock(&x->lock);
xfrm_state_put(x);
x = NULL;
}
if (!x) {
XFRM_INC_STATS(LINUX_MIB_XFRMINNOSTATES);