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ipv6: Pass fib6_result to rt6_insert_exception

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Update rt6_insert_exception to take a fib6_result over a fib6_info.
Change ort to f6i from the fib6_result and rename to better reflect
what it references (a fib6_info).

Since this function is already getting changed, update the comments
to reference fib6_info variables rather than the older rt6_info.

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 14:36:05 -07:00 committed by David S. Miller
parent 0d16158149
commit 5012f0a594
1 changed files with 17 additions and 16 deletions
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33
net/ipv6/route.c
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@ -1439,22 +1439,23 @@ static unsigned int fib6_mtu(const struct fib6_info *rt)
}
static int rt6_insert_exception(struct rt6_info *nrt,
struct fib6_info *ort)
const struct fib6_result *res)
{
struct net *net = dev_net(nrt->dst.dev);
struct rt6_exception_bucket *bucket;
struct in6_addr *src_key = NULL;
struct rt6_exception *rt6_ex;
struct fib6_info *f6i = res->f6i;
int err = 0;
spin_lock_bh(&rt6_exception_lock);
if (ort->exception_bucket_flushed) {
if (f6i->exception_bucket_flushed) {
err = -EINVAL;
goto out;
}
bucket = rcu_dereference_protected(ort->rt6i_exception_bucket,
bucket = rcu_dereference_protected(f6i->rt6i_exception_bucket,
lockdep_is_held(&rt6_exception_lock));
if (!bucket) {
bucket = kcalloc(FIB6_EXCEPTION_BUCKET_SIZE, sizeof(*bucket),
@ -1463,24 +1464,24 @@ static int rt6_insert_exception(struct rt6_info *nrt,
err = -ENOMEM;
goto out;
}
rcu_assign_pointer(ort->rt6i_exception_bucket, bucket);
rcu_assign_pointer(f6i->rt6i_exception_bucket, bucket);
}
#ifdef CONFIG_IPV6_SUBTREES
/* rt6i_src.plen != 0 indicates ort is in subtree
/* fib6_src.plen != 0 indicates f6i is in subtree
* and exception table is indexed by a hash of
* both rt6i_dst and rt6i_src.
* both fib6_dst and fib6_src.
* Otherwise, the exception table is indexed by
* a hash of only rt6i_dst.
* a hash of only fib6_dst.
*/
if (ort->fib6_src.plen)
if (f6i->fib6_src.plen)
src_key = &nrt->rt6i_src.addr;
#endif
/* rt6_mtu_change() might lower mtu on ort.
/* rt6_mtu_change() might lower mtu on f6i.
* Only insert this exception route if its mtu
* is less than ort's mtu value.
* is less than f6i's mtu value.
*/
if (dst_metric_raw(&nrt->dst, RTAX_MTU) >= fib6_mtu(ort)) {
if (dst_metric_raw(&nrt->dst, RTAX_MTU) >= fib6_mtu(res->f6i)) {
err = -EINVAL;
goto out;
}
@ -1509,9 +1510,9 @@ out:
/* Update fn->fn_sernum to invalidate all cached dst */
if (!err) {
spin_lock_bh(&ort->fib6_table->tb6_lock);
fib6_update_sernum(net, ort);
spin_unlock_bh(&ort->fib6_table->tb6_lock);
spin_lock_bh(&f6i->fib6_table->tb6_lock);
fib6_update_sernum(net, f6i);
spin_unlock_bh(&f6i->fib6_table->tb6_lock);
fib6_force_start_gc(net);
}
@ -2352,7 +2353,7 @@ static void __ip6_rt_update_pmtu(struct dst_entry *dst, const struct sock *sk,
nrt6 = ip6_rt_cache_alloc(&res, daddr, saddr);
if (nrt6) {
rt6_do_update_pmtu(nrt6, mtu);
if (rt6_insert_exception(nrt6, res.f6i))
if (rt6_insert_exception(nrt6, &res))
dst_release_immediate(&nrt6->dst);
}
rcu_read_unlock();
@ -3486,7 +3487,7 @@ static void rt6_do_redirect(struct dst_entry *dst, struct sock *sk, struct sk_bu
* a cached route because rt6_insert_exception() will
* takes care of it
*/
if (rt6_insert_exception(nrt, res.f6i)) {
if (rt6_insert_exception(nrt, &res)) {
dst_release_immediate(&nrt->dst);
goto out;
}