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[DECNET]: Convert decnet route to use the new dst_entry 'next' pointer

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This patch removes the next pointer from 'struct dn_route.u' union,
and renames u.rt_next to u.dst.dn_next.

It also moves 'struct flowi' right after 'struct dst_entry' to prepare
speedup lookups.

Signed-off-by: Eric Dumazet <dada1@cosmosbay.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Eric Dumazet 2007-02-09 16:25:52 -08:00 committed by David S. Miller
parent 7cc482634f
commit 0c195c3fc4
2 changed files with 18 additions and 19 deletions
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5
include/net/dn_route.h
View File

@ -68,9 +68,10 @@ extern void dn_rt_cache_flush(int delay);
struct dn_route {
union {
struct dst_entry dst;
struct dn_route *rt_next;
} u;
struct flowi fl;
__le16 rt_saddr;
__le16 rt_daddr;
__le16 rt_gateway;
@ -80,8 +81,6 @@ struct dn_route {
unsigned rt_flags;
unsigned rt_type;
struct flowi fl;
};
extern void dn_route_init(void);

32
net/decnet/dn_route.c
View File

@ -167,11 +167,11 @@ static void dn_dst_check_expire(unsigned long dummy)
while((rt=*rtp) != NULL) {
if (atomic_read(&rt->u.dst.__refcnt) ||
(now - rt->u.dst.lastuse) < expire) {
rtp = &rt->u.rt_next;
rtp = &rt->u.dst.dn_next;
continue;
}
*rtp = rt->u.rt_next;
rt->u.rt_next = NULL;
*rtp = rt->u.dst.dn_next;
rt->u.dst.dn_next = NULL;
dnrt_free(rt);
}
spin_unlock(&dn_rt_hash_table[i].lock);
@ -198,11 +198,11 @@ static int dn_dst_gc(void)
while((rt=*rtp) != NULL) {
if (atomic_read(&rt->u.dst.__refcnt) ||
(now - rt->u.dst.lastuse) < expire) {
rtp = &rt->u.rt_next;
rtp = &rt->u.dst.dn_next;
continue;
}
*rtp = rt->u.rt_next;
rt->u.rt_next = NULL;
*rtp = rt->u.dst.dn_next;
rt->u.dst.dn_next = NULL;
dnrt_drop(rt);
break;
}
@ -286,8 +286,8 @@ static int dn_insert_route(struct dn_route *rt, unsigned hash, struct dn_route *
while((rth = *rthp) != NULL) {
if (compare_keys(&rth->fl, &rt->fl)) {
/* Put it first */
*rthp = rth->u.rt_next;
rcu_assign_pointer(rth->u.rt_next,
*rthp = rth->u.dst.dn_next;
rcu_assign_pointer(rth->u.dst.dn_next,
dn_rt_hash_table[hash].chain);
rcu_assign_pointer(dn_rt_hash_table[hash].chain, rth);
@ -300,10 +300,10 @@ static int dn_insert_route(struct dn_route *rt, unsigned hash, struct dn_route *
*rp = rth;
return 0;
}
rthp = &rth->u.rt_next;
rthp = &rth->u.dst.dn_next;
}
rcu_assign_pointer(rt->u.rt_next, dn_rt_hash_table[hash].chain);
rcu_assign_pointer(rt->u.dst.dn_next, dn_rt_hash_table[hash].chain);
rcu_assign_pointer(dn_rt_hash_table[hash].chain, rt);
dst_hold(&rt->u.dst);
@ -326,8 +326,8 @@ void dn_run_flush(unsigned long dummy)
goto nothing_to_declare;
for(; rt; rt=next) {
next = rt->u.rt_next;
rt->u.rt_next = NULL;
next = rt->u.dst.dn_next;
rt->u.dst.dn_next = NULL;
dst_free((struct dst_entry *)rt);
}
@ -1169,7 +1169,7 @@ static int __dn_route_output_key(struct dst_entry **pprt, const struct flowi *fl
if (!(flags & MSG_TRYHARD)) {
rcu_read_lock_bh();
for(rt = rcu_dereference(dn_rt_hash_table[hash].chain); rt;
rt = rcu_dereference(rt->u.rt_next)) {
rt = rcu_dereference(rt->u.dst.dn_next)) {
if ((flp->fld_dst == rt->fl.fld_dst) &&
(flp->fld_src == rt->fl.fld_src) &&
(flp->mark == rt->fl.mark) &&
@ -1443,7 +1443,7 @@ int dn_route_input(struct sk_buff *skb)
rcu_read_lock();
for(rt = rcu_dereference(dn_rt_hash_table[hash].chain); rt != NULL;
rt = rcu_dereference(rt->u.rt_next)) {
rt = rcu_dereference(rt->u.dst.dn_next)) {
if ((rt->fl.fld_src == cb->src) &&
(rt->fl.fld_dst == cb->dst) &&
(rt->fl.oif == 0) &&
@ -1627,7 +1627,7 @@ int dn_cache_dump(struct sk_buff *skb, struct netlink_callback *cb)
rcu_read_lock_bh();
for(rt = rcu_dereference(dn_rt_hash_table[h].chain), idx = 0;
rt;
rt = rcu_dereference(rt->u.rt_next), idx++) {
rt = rcu_dereference(rt->u.dst.dn_next), idx++) {
if (idx < s_idx)
continue;
skb->dst = dst_clone(&rt->u.dst);
@ -1673,7 +1673,7 @@ static struct dn_route *dn_rt_cache_get_next(struct seq_file *seq, struct dn_rou
{
struct dn_rt_cache_iter_state *s = rcu_dereference(seq->private);
rt = rt->u.rt_next;
rt = rt->u.dst.dn_next;
while(!rt) {
rcu_read_unlock_bh();
if (--s->bucket < 0)