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Message-Id: <20110717.123024.463888631372775748.davem@davemloft.net>
Date: Sun, 17 Jul 2011 12:30:24 -0700 (PDT)
From: David Miller <davem@...emloft.net>
To: netdev@...r.kernel.org
Subject: [PATCH 4/5] neigh: Kill hh_cache->hh_output
It's just taking on one of two possible values, either
neigh_ops->output or dev_queue_xmit(). And this is purely depending
upon whether nud_state has NUD_CONNECTED set or not.
Signed-off-by: David S. Miller <davem@...emloft.net>
---
include/linux/netdevice.h | 1 -
include/net/neighbour.h | 4 ++--
net/core/neighbour.c | 25 ++-----------------------
net/ipv4/route.c | 6 +++---
4 files changed, 7 insertions(+), 29 deletions(-)
diff --git a/include/linux/netdevice.h b/include/linux/netdevice.h
index f84dfd2..52c4e38 100644
--- a/include/linux/netdevice.h
+++ b/include/linux/netdevice.h
@@ -254,7 +254,6 @@ struct netdev_hw_addr_list {
struct hh_cache {
u16 hh_len;
u16 __pad;
- int (*hh_output)(struct sk_buff *skb);
seqlock_t hh_lock;
/* cached hardware header; allow for machine alignment needs. */
diff --git a/include/net/neighbour.h b/include/net/neighbour.h
index 97990dd..60bac81 100644
--- a/include/net/neighbour.h
+++ b/include/net/neighbour.h
@@ -340,13 +340,13 @@ static inline int neigh_hh_output(struct hh_cache *hh, struct sk_buff *skb)
} while (read_seqretry(&hh->hh_lock, seq));
skb_push(skb, hh_len);
- return hh->hh_output(skb);
+ return dev_queue_xmit(skb);
}
static inline int neigh_output(struct neighbour *n, struct sk_buff *skb)
{
struct hh_cache *hh = &n->hh;
- if (hh->hh_len)
+ if ((n->nud_state & NUD_CONNECTED) && hh->hh_len)
return neigh_hh_output(hh, skb);
else
return n->output(skb);
diff --git a/net/core/neighbour.c b/net/core/neighbour.c
index c22def5..2feda6e7 100644
--- a/net/core/neighbour.c
+++ b/net/core/neighbour.c
@@ -720,15 +720,9 @@ EXPORT_SYMBOL(neigh_destroy);
*/
static void neigh_suspect(struct neighbour *neigh)
{
- struct hh_cache *hh;
-
NEIGH_PRINTK2("neigh %p is suspected.\n", neigh);
neigh->output = neigh->ops->output;
-
- hh = &neigh->hh;
- if (hh->hh_len)
- hh->hh_output = neigh->ops->output;
}
/* Neighbour state is OK;
@@ -738,15 +732,9 @@ static void neigh_suspect(struct neighbour *neigh)
*/
static void neigh_connect(struct neighbour *neigh)
{
- struct hh_cache *hh;
-
NEIGH_PRINTK2("neigh %p is connected.\n", neigh);
neigh->output = neigh->ops->connected_output;
-
- hh = &neigh->hh;
- if (hh->hh_len)
- hh->hh_output = dev_queue_xmit;
}
static void neigh_periodic_work(struct work_struct *work)
@@ -1215,18 +1203,9 @@ static void neigh_hh_init(struct neighbour *n, struct dst_entry *dst)
/* Only one thread can come in here and initialize the
* hh_cache entry.
*/
- if (hh->hh_len)
- goto end;
-
- if (dev->header_ops->cache(n, hh, prot))
- goto end;
-
- if (n->nud_state & NUD_CONNECTED)
- hh->hh_output = dev_queue_xmit;
- else
- hh->hh_output = n->ops->output;
+ if (!hh->hh_len)
+ dev->header_ops->cache(n, hh, prot);
-end:
write_unlock_bh(&n->lock);
}
diff --git a/net/ipv4/route.c b/net/ipv4/route.c
index a52bb74..bcf9bb5 100644
--- a/net/ipv4/route.c
+++ b/net/ipv4/route.c
@@ -427,9 +427,9 @@ static int rt_cache_seq_show(struct seq_file *seq, void *v)
dst_metric(&r->dst, RTAX_RTTVAR)),
r->rt_key_tos,
-1,
- (r->dst.neighbour ?
- (r->dst.neighbour->hh.hh_output ==
- dev_queue_xmit) : 0),
+ (r->dst.neighbour &&
+ (r->dst.neighbour->nud_state & NUD_CONNECTED)) ?
+ 1 : 0,
r->rt_spec_dst, &len);
seq_printf(seq, "%*s\n", 127 - len, "");
--
1.7.6
--
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