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ipv4: Attach FIB info to dst_default_metrics when possible

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If there are no explicit metrics attached to a route, hook
fi->fib_info up to dst_default_metrics.

Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
David S. Miller 2011-01-28 14:05:05 -08:00
parent 9c150e82ac
commit 725d1e1b45
3 changed files with 10 additions and 5 deletions
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1
include/net/dst.h
View file

@ -97,6 +97,7 @@ struct dst_entry {
#ifdef __KERNEL__
extern u32 *dst_cow_metrics_generic(struct dst_entry *dst, unsigned long old);
extern const u32 dst_default_metrics[RTAX_MAX];
#define DST_METRICS_READ_ONLY 0x1UL
#define __DST_METRICS_PTR(Y) \

2
net/core/dst.c
View file

@ -164,7 +164,7 @@ int dst_discard(struct sk_buff *skb)
}
EXPORT_SYMBOL(dst_discard);
static const u32 dst_default_metrics[RTAX_MAX];
const u32 dst_default_metrics[RTAX_MAX];
void *dst_alloc(struct dst_ops *ops)
{

12
net/ipv4/fib_semantics.c
View file

@ -152,7 +152,8 @@ static void free_fib_info_rcu(struct rcu_head *head)
{
struct fib_info *fi = container_of(head, struct fib_info, rcu);
kfree(fi->fib_metrics);
if (fi->fib_metrics != (u32 *) dst_default_metrics)
kfree(fi->fib_metrics);
kfree(fi);
}
@ -743,9 +744,12 @@ struct fib_info *fib_create_info(struct fib_config *cfg)
fi = kzalloc(sizeof(*fi)+nhs*sizeof(struct fib_nh), GFP_KERNEL);
if (fi == NULL)
goto failure;
fi->fib_metrics = kzalloc(sizeof(u32) * RTAX_MAX, GFP_KERNEL);
if (!fi->fib_metrics)
goto failure;
if (cfg->fc_mx) {
fi->fib_metrics = kzalloc(sizeof(u32) * RTAX_MAX, GFP_KERNEL);
if (!fi->fib_metrics)
goto failure;
} else
fi->fib_metrics = (u32 *) dst_default_metrics;
fib_info_cnt++;
fi->fib_net = hold_net(net);