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net: ipv6: introduce ip6_dst_mtu_maybe_forward

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Replace ip6_dst_mtu_forward with ip6_dst_mtu_maybe_forward and
reuse this code in ip6_mtu. Actually these two functions were
almost duplicates, this change will simplify the maintaince of
mtu calculation code.

Signed-off-by: Vadim Fedorenko <vfedorenko@novek.ru>
Reviewed-by: David Ahern <dsahern@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Vadim Fedorenko
2021-07-21 08:22:02 -07:00
committed by David S. Miller
parent 7c804e91df
commit 427faee167
4 changed files with 6 additions and 23 deletions
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include/net/ip6_route.h
+3 -2
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@@ -316,12 +316,13 @@ static inline bool rt6_duplicate_nexthop(struct fib6_info *a, struct fib6_info *
!lwtunnel_cmp_encap(nha->fib_nh_lws, nhb->fib_nh_lws);
}
static inline unsigned int ip6_dst_mtu_forward(const struct dst_entry *dst)
static inline unsigned int ip6_dst_mtu_maybe_forward(const struct dst_entry *dst,
bool forwarding)
{
struct inet6_dev *idev;
unsigned int mtu;
if (dst_metric_locked(dst, RTAX_MTU)) {
if (!forwarding || dst_metric_locked(dst, RTAX_MTU)) {
mtu = dst_metric_raw(dst, RTAX_MTU);
if (mtu)
goto out;