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net: Move free of dst_metrics to helper

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Move the refcounting and potential free of dst metrics associated
for ipv4 and ipv6 to a common helper.

Signed-off-by: David Ahern <[email protected]>
Signed-off-by: David S. Miller <[email protected]>
This commit is contained in:
David Ahern 2018-10-04 20:07:54 -07:00 • committed by David S. Miller
commit 1620a33695
3 changed files with 11 additions and 8 deletions
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9
include/net/ip.h
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@ -441,6 +441,15 @@ void ip_dst_init_metrics(struct dst_entry *dst, struct dst_metrics *fib_metrics)
}
}
static inline
void ip_dst_metrics_put(struct dst_entry *dst)
{
struct dst_metrics *p = (struct dst_metrics *)DST_METRICS_PTR(dst);
if (p != &dst_default_metrics && refcount_dec_and_test(&p->refcnt))
kfree(p);
}
u32 ip_idents_reserve(u32 hash, int segs);
void __ip_select_ident(struct net *net, struct iphdr *iph, int segs);