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Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net

Browse source 
Conflicts were easy to resolve using immediate context mostly,
except the cls_u32.c one where I simply too the entire HEAD
chunk.

Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
David S. Miller 2018-10-12 21:38:46 -07:00
commit d864991b22
161 changed files with 1420 additions and 686 deletions
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50
net/ipv4/fib_semantics.c
View file

@ -1457,6 +1457,56 @@ static int call_fib_nh_notifiers(struct fib_nh *fib_nh,
return NOTIFY_DONE;
}
/* Update the PMTU of exceptions when:
* - the new MTU of the first hop becomes smaller than the PMTU
* - the old MTU was the same as the PMTU, and it limited discovery of
* larger MTUs on the path. With that limit raised, we can now
* discover larger MTUs
* A special case is locked exceptions, for which the PMTU is smaller
* than the minimal accepted PMTU:
* - if the new MTU is greater than the PMTU, don't make any change
* - otherwise, unlock and set PMTU
*/
static void nh_update_mtu(struct fib_nh *nh, u32 new, u32 orig)
{
struct fnhe_hash_bucket *bucket;
int i;
bucket = rcu_dereference_protected(nh->nh_exceptions, 1);
if (!bucket)
return;
for (i = 0; i < FNHE_HASH_SIZE; i++) {
struct fib_nh_exception *fnhe;
for (fnhe = rcu_dereference_protected(bucket[i].chain, 1);
fnhe;
fnhe = rcu_dereference_protected(fnhe->fnhe_next, 1)) {
if (fnhe->fnhe_mtu_locked) {
if (new <= fnhe->fnhe_pmtu) {
fnhe->fnhe_pmtu = new;
fnhe->fnhe_mtu_locked = false;
}
} else if (new < fnhe->fnhe_pmtu ||
orig == fnhe->fnhe_pmtu) {
fnhe->fnhe_pmtu = new;
}
}
}
}
void fib_sync_mtu(struct net_device *dev, u32 orig_mtu)
{
unsigned int hash = fib_devindex_hashfn(dev->ifindex);
struct hlist_head *head = &fib_info_devhash[hash];
struct fib_nh *nh;
hlist_for_each_entry(nh, head, nh_hash) {
if (nh->nh_dev == dev)
nh_update_mtu(nh, dev->mtu, orig_mtu);
}
}
/* Event force Flags Description
* NETDEV_CHANGE 0 LINKDOWN Carrier OFF, not for scope host
* NETDEV_DOWN 0 LINKDOWN|DEAD Link down, not for scope host