When same struct dst_entry can be used for many different
neighbours we can not use it for pending confirmations.
As last step, we can remove the pending_confirm flag.
Reported-by: YueHaibing <yuehaibing@xxxxxxxxxx>
Fixes: 5110effee8fd ("net: Do delayed neigh confirmation.")
Fixes: f2bb4bedf35d ("ipv4: Cache output routes in fib_info nexthops.")
Signed-off-by: Julian Anastasov <ja@xxxxxx>
Acked-by: Eric Dumazet <edumazet@xxxxxxxxxx>
---
include/net/dst.h | 14 ++------------
net/core/dst.c | 1 -
2 files changed, 2 insertions(+), 13 deletions(-)
diff --git a/include/net/dst.h b/include/net/dst.h
index 3a3b34b..84a1043 100644
--- a/include/net/dst.h
+++ b/include/net/dst.h
@@ -59,8 +59,6 @@ struct dst_entry {
#define DST_XFRM_QUEUE 0x0100
#define DST_METADATA 0x0200
- unsigned short pending_confirm;
-
short error;
/* A non-zero value of dst->obsolete forces by-hand validation
@@ -78,6 +76,8 @@ struct dst_entry {
#define DST_OBSOLETE_KILL -2
unsigned short header_len; /* more space at head required */
unsigned short trailer_len; /* space to reserve at tail */
+ unsigned short __pad3;
+
#ifdef CONFIG_IP_ROUTE_CLASSID
__u32 tclassid;
#else
@@ -440,7 +440,6 @@ static inline void dst_rcu_free(struct rcu_head *head)
static inline void dst_confirm(struct dst_entry *dst)
{
- dst->pending_confirm = 1;
}
static inline int dst_neigh_output(struct dst_entry *dst, struct neighbour *n,
@@ -448,15 +447,6 @@ static inline int dst_neigh_output(struct dst_entry *dst, struct neighbour *n,
{
const struct hh_cache *hh;
- if (dst->pending_confirm) {
- unsigned long now = jiffies;
-
- dst->pending_confirm = 0;
- /* avoid dirtying neighbour */
- if (n->confirmed != now)
- n->confirmed = now;
- }
-
hh = &n->hh;
if ((n->nud_state & NUD_CONNECTED) && hh->hh_len)
return neigh_hh_output(hh, skb);
diff --git a/net/core/dst.c b/net/core/dst.c
index b5cbbe0..960e503 100644
--- a/net/core/dst.c
+++ b/net/core/dst.c
@@ -190,7 +190,6 @@ void dst_init(struct dst_entry *dst, struct dst_ops *ops,
dst->__use = 0;
dst->lastuse = jiffies;
dst->flags = flags;
- dst->pending_confirm = 0;
dst->next = NULL;
if (!(flags & DST_NOCOUNT))
dst_entries_add(ops, 1);
--
1.9.3
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