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ipv6: Pass fib6_result to ip6_mtu_from_fib6 and fib6_mtu

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Change ip6_mtu_from_fib6 and fib6_mtu to take a fib6_result over a
fib6_info. Update both to use the fib6_nh from fib6_result.

Since the signature of ip6_mtu_from_fib6 is already changing, add const
to daddr and saddr.

Signed-off-by: David Ahern <dsahern@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
David Ahern
2019-04-16 14:36:06 -07:00
committed by David S. Miller
parent 5012f0a594
commit b748f26092
5 changed files with 25 additions and 18 deletions
Download Patch File Download Diff File Expand all files Collapse all files

26
net/ipv6/route.c
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@@ -1417,14 +1417,15 @@ __rt6_find_exception_rcu(struct rt6_exception_bucket **bucket,
return NULL;
}
static unsigned int fib6_mtu(const struct fib6_info *rt)
static unsigned int fib6_mtu(const struct fib6_result *res)
{
const struct fib6_nh *nh = res->nh;
unsigned int mtu;
if (rt->fib6_pmtu) {
mtu = rt->fib6_pmtu;
if (res->f6i->fib6_pmtu) {
mtu = res->f6i->fib6_pmtu;
} else {
struct net_device *dev = fib6_info_nh_dev(rt);
struct net_device *dev = nh->fib_nh_dev;
struct inet6_dev *idev;
rcu_read_lock();
@@ -1435,7 +1436,7 @@ static unsigned int fib6_mtu(const struct fib6_info *rt)
mtu = min_t(unsigned int, mtu, IP6_MAX_MTU);
return mtu - lwtunnel_headroom(rt->fib6_nh.fib_nh_lws, mtu);
return mtu - lwtunnel_headroom(nh->fib_nh_lws, mtu);
}
static int rt6_insert_exception(struct rt6_info *nrt,
@@ -1481,7 +1482,7 @@ static int rt6_insert_exception(struct rt6_info *nrt,
* Only insert this exception route if its mtu
* is less than f6i's mtu value.
*/
if (dst_metric_raw(&nrt->dst, RTAX_MTU) >= fib6_mtu(res->f6i)) {
if (dst_metric_raw(&nrt->dst, RTAX_MTU) >= fib6_mtu(res)) {
err = -EINVAL;
goto out;
}
@@ -2640,12 +2641,15 @@ out:
* based on ip6_dst_mtu_forward and exception logic of
* rt6_find_cached_rt; called with rcu_read_lock
*/
u32 ip6_mtu_from_fib6(struct fib6_info *f6i, struct in6_addr *daddr,
struct in6_addr *saddr)
u32 ip6_mtu_from_fib6(const struct fib6_result *res,
const struct in6_addr *daddr,
const struct in6_addr *saddr)
{
struct rt6_exception_bucket *bucket;
const struct fib6_nh *nh = res->nh;
struct fib6_info *f6i = res->f6i;
const struct in6_addr *src_key;
struct rt6_exception *rt6_ex;
struct in6_addr *src_key;
struct inet6_dev *idev;
u32 mtu = 0;
@@ -2667,7 +2671,7 @@ u32 ip6_mtu_from_fib6(struct fib6_info *f6i, struct in6_addr *daddr,
mtu = dst_metric_raw(&rt6_ex->rt6i->dst, RTAX_MTU);
if (likely(!mtu)) {
struct net_device *dev = fib6_info_nh_dev(f6i);
struct net_device *dev = nh->fib_nh_dev;
mtu = IPV6_MIN_MTU;
idev = __in6_dev_get(dev);
@@ -2677,7 +2681,7 @@ u32 ip6_mtu_from_fib6(struct fib6_info *f6i, struct in6_addr *daddr,
mtu = min_t(unsigned int, mtu, IP6_MAX_MTU);
out:
return mtu - lwtunnel_headroom(fib6_info_nh_lwt(f6i), mtu);
return mtu - lwtunnel_headroom(nh->fib_nh_lws, mtu);
}
struct dst_entry *icmp6_dst_alloc(struct net_device *dev,