AcoSail/kernel_optimize_test
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ipv4: Don't store a rule pointer in fib_result.

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We only use it to fetch the rule's tclassid, so just store the
tclassid there instead.

This also decreases the size of fib_result by a full 8 bytes on
64-bit.  On 32-bits it's a wash.

Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
David S. Miller 2012-07-13 08:21:29 -07:00
parent d01cb20711
commit 85b91b0339
4 changed files with 11 additions and 30 deletions
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12
include/net/ip_fib.h
View File

@ -106,12 +106,10 @@ struct fib_result {
unsigned char nh_sel;
unsigned char type;
unsigned char scope;
u32 tclassid;
struct fib_info *fi;
struct fib_table *table;
struct list_head *fa_head;
#ifdef CONFIG_IP_MULTIPLE_TABLES
struct fib_rule *r;
#endif
};
struct fib_result_nl {
@ -215,10 +213,6 @@ static inline int fib_lookup(struct net *net, const struct flowi4 *flp,
extern int __net_init fib4_rules_init(struct net *net);
extern void __net_exit fib4_rules_exit(struct net *net);
#ifdef CONFIG_IP_ROUTE_CLASSID
extern u32 fib_rules_tclass(const struct fib_result *res);
#endif
extern struct fib_table *fib_new_table(struct net *net, u32 id);
extern struct fib_table *fib_get_table(struct net *net, u32 id);
@ -229,7 +223,7 @@ static inline int fib_lookup(struct net *net, struct flowi4 *flp,
struct fib_result *res)
{
if (!net->ipv4.fib_has_custom_rules) {
res->r = NULL;
res->tclassid = 0;
if (net->ipv4.fib_local &&
!fib_table_lookup(net->ipv4.fib_local, flp, res,
FIB_LOOKUP_NOREF))
@ -289,7 +283,7 @@ static inline void fib_combine_itag(u32 *itag, const struct fib_result *res)
#endif
*itag = FIB_RES_NH(*res).nh_tclassid<<16;
#ifdef CONFIG_IP_MULTIPLE_TABLES
rtag = fib_rules_tclass(res);
rtag = res->tclassid;
if (*itag == 0)
*itag = (rtag<<16);
*itag |= (rtag>>16);

8
net/ipv4/fib_frontend.c
View File

@ -169,10 +169,6 @@ static inline unsigned int __inet_dev_addr_type(struct net *net,
if (ipv4_is_multicast(addr))
return RTN_MULTICAST;
#ifdef CONFIG_IP_MULTIPLE_TABLES
res.r = NULL;
#endif
local_table = fib_get_table(net, RT_TABLE_LOCAL);
if (local_table) {
ret = RTN_UNICAST;
@ -934,10 +930,6 @@ static void nl_fib_lookup(struct fib_result_nl *frn, struct fib_table *tb)
.flowi4_scope = frn->fl_scope,
};
#ifdef CONFIG_IP_MULTIPLE_TABLES
res.r = NULL;
#endif
frn->err = -ENOENT;
if (tb) {
local_bh_disable();

15
net/ipv4/fib_rules.c
View File

@ -47,13 +47,6 @@ struct fib4_rule {
#endif
};
#ifdef CONFIG_IP_ROUTE_CLASSID
u32 fib_rules_tclass(const struct fib_result *res)
{
return res->r ? ((struct fib4_rule *) res->r)->tclassid : 0;
}
#endif
int __fib_lookup(struct net *net, struct flowi4 *flp, struct fib_result *res)
{
struct fib_lookup_arg arg = {
@ -63,8 +56,12 @@ int __fib_lookup(struct net *net, struct flowi4 *flp, struct fib_result *res)
int err;
err = fib_rules_lookup(net->ipv4.rules_ops, flowi4_to_flowi(flp), 0, &arg);
res->r = arg.rule;
#ifdef CONFIG_IP_ROUTE_CLASSID
if (arg.rule)
res->tclassid = ((struct fib4_rule *)arg.rule)->tclassid;
else
res->tclassid = 0;
#endif
return err;
}
EXPORT_SYMBOL_GPL(__fib_lookup);

6
net/ipv4/route.c
View File

@ -1735,7 +1735,7 @@ static void rt_set_nexthop(struct rtable *rt, const struct flowi4 *fl4,
#ifdef CONFIG_IP_ROUTE_CLASSID
#ifdef CONFIG_IP_MULTIPLE_TABLES
set_class_tag(rt, fib_rules_tclass(res));
set_class_tag(rt, res->tclassid);
#endif
set_class_tag(rt, itag);
#endif
@ -2353,11 +2353,9 @@ static struct rtable *ip_route_output_slow(struct net *net, struct flowi4 *fl4)
__be32 orig_saddr;
int orig_oif;
res.tclassid = 0;
res.fi = NULL;
res.table = NULL;
#ifdef CONFIG_IP_MULTIPLE_TABLES
res.r = NULL;
#endif
orig_daddr = fl4->daddr;
orig_saddr = fl4->saddr;