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Date: Wed, 26 Mar 2008 08:44:39 +0900 (JST)
From: YOSHIFUJI Hideaki / 吉藤英明
<yoshfuji@...ux-ipv6.org>
To: davem@...emloft.net
Cc: xemul@...nvz.org, dlezcano@...ibm.com, brian.haley@...com,
yoshfuji@...ux-ipv6.org, netdev@...r.kernel.org
Subject: [PATCH 4/5] [NET] NETNS: Omit neigh_parms->net and
pneigh_entry->net without CONFIG_NET_NS.
Introduce neigh_parms/pneigh_entry inlines: neigh_parms_net(), pneigh_net().
Without CONFIG_NET_NS, no namespace other than &init_net exists.
Let's explicitly define them to help compiler optimizations.
Signed-off-by: YOSHIFUJI Hideaki <yoshfuji@...ux-ipv6.org>
---
include/net/neighbour.h | 25 +++++++++++++++++++++++++
net/core/neighbour.c | 26 ++++++++++++++++----------
2 files changed, 41 insertions(+), 10 deletions(-)
diff --git a/include/net/neighbour.h b/include/net/neighbour.h
index 0622818..8bec0d6 100644
--- a/include/net/neighbour.h
+++ b/include/net/neighbour.h
@@ -38,7 +38,9 @@ struct neighbour;
struct neigh_parms
{
+#ifdef CONFIG_NET_NS
struct net *net;
+#endif
struct net_device *dev;
struct neigh_parms *next;
int (*neigh_setup)(struct neighbour *);
@@ -131,7 +133,9 @@ struct neigh_ops
struct pneigh_entry
{
struct pneigh_entry *next;
+#ifdef CONFIG_NET_NS
struct net *net;
+#endif
struct net_device *dev;
u8 flags;
u8 key[0];
@@ -213,6 +217,17 @@ extern struct neighbour *neigh_event_ns(struct neigh_table *tbl,
extern struct neigh_parms *neigh_parms_alloc(struct net_device *dev, struct neigh_table *tbl);
extern void neigh_parms_release(struct neigh_table *tbl, struct neigh_parms *parms);
+
+static inline
+struct net *neigh_parms_net(const struct neigh_parms *parms)
+{
+#ifdef CONFIG_NET_NS
+ return parms->net;
+#else
+ return &init_net;
+#endif
+}
+
extern unsigned long neigh_rand_reach_time(unsigned long base);
extern void pneigh_enqueue(struct neigh_table *tbl, struct neigh_parms *p,
@@ -220,6 +235,16 @@ extern void pneigh_enqueue(struct neigh_table *tbl, struct neigh_parms *p,
extern struct pneigh_entry *pneigh_lookup(struct neigh_table *tbl, struct net *net, const void *key, struct net_device *dev, int creat);
extern int pneigh_delete(struct neigh_table *tbl, struct net *net, const void *key, struct net_device *dev);
+static inline
+struct net *pneigh_net(const struct pneigh_entry *pneigh)
+{
+#ifdef CONFIG_NET_NS
+ return pneigh->net;
+#else
+ return &init_net;
+#endif
+}
+
extern void neigh_app_ns(struct neighbour *n);
extern void neigh_for_each(struct neigh_table *tbl, void (*cb)(struct neighbour *, void *), void *cookie);
extern void __neigh_for_each_release(struct neigh_table *tbl, int (*cb)(struct neighbour *));
diff --git a/net/core/neighbour.c b/net/core/neighbour.c
index b8d491f..de654ea 100644
--- a/net/core/neighbour.c
+++ b/net/core/neighbour.c
@@ -483,7 +483,7 @@ struct pneigh_entry * pneigh_lookup(struct neigh_table *tbl,
for (n = tbl->phash_buckets[hash_val]; n; n = n->next) {
if (!memcmp(n->key, pkey, key_len) &&
- (n->net == net) &&
+ (pneigh_net(n) == net) &&
(n->dev == dev || !n->dev)) {
read_unlock_bh(&tbl->lock);
goto out;
@@ -500,7 +500,9 @@ struct pneigh_entry * pneigh_lookup(struct neigh_table *tbl,
if (!n)
goto out;
+#ifdef CONFIG_NET_NS
n->net = hold_net(net);
+#endif
memcpy(n->key, pkey, key_len);
n->dev = dev;
if (dev)
@@ -540,14 +542,14 @@ int pneigh_delete(struct neigh_table *tbl, struct net *net, const void *pkey,
for (np = &tbl->phash_buckets[hash_val]; (n = *np) != NULL;
np = &n->next) {
if (!memcmp(n->key, pkey, key_len) && n->dev == dev &&
- (n->net == net)) {
+ (pneigh_net(n) == net)) {
*np = n->next;
write_unlock_bh(&tbl->lock);
if (tbl->pdestructor)
tbl->pdestructor(n);
if (n->dev)
dev_put(n->dev);
- release_net(n->net);
+ release_net(pneigh_net(n));
kfree(n);
return 0;
}
@@ -570,7 +572,7 @@ static int pneigh_ifdown(struct neigh_table *tbl, struct net_device *dev)
tbl->pdestructor(n);
if (n->dev)
dev_put(n->dev);
- release_net(n->net);
+ release_net(pneigh_net(n));
kfree(n);
continue;
}
@@ -1284,7 +1286,7 @@ static inline struct neigh_parms *lookup_neigh_params(struct neigh_table *tbl,
struct neigh_parms *p;
for (p = &tbl->parms; p; p = p->next) {
- if ((p->dev && p->dev->ifindex == ifindex && p->net == net) ||
+ if ((p->dev && p->dev->ifindex == ifindex && neigh_parms_net(p) == net) ||
(!p->dev && !ifindex))
return p;
}
@@ -1318,7 +1320,9 @@ struct neigh_parms *neigh_parms_alloc(struct net_device *dev,
dev_hold(dev);
p->dev = dev;
+#ifdef CONFIG_NET_NS
p->net = hold_net(net);
+#endif
p->sysctl_table = NULL;
write_lock_bh(&tbl->lock);
p->next = tbl->parms.next;
@@ -1360,7 +1364,7 @@ void neigh_parms_release(struct neigh_table *tbl, struct neigh_parms *parms)
static void neigh_parms_destroy(struct neigh_parms *parms)
{
- release_net(parms->net);
+ release_net(neigh_parms_net(parms));
kfree(parms);
}
@@ -1371,7 +1375,9 @@ void neigh_table_init_no_netlink(struct neigh_table *tbl)
unsigned long now = jiffies;
unsigned long phsize;
+#ifdef CONFIG_NET_NS
tbl->parms.net = &init_net;
+#endif
atomic_set(&tbl->parms.refcnt, 1);
INIT_RCU_HEAD(&tbl->parms.rcu_head);
tbl->parms.reachable_time =
@@ -1958,7 +1964,7 @@ static int neightbl_dump_info(struct sk_buff *skb, struct netlink_callback *cb)
break;
for (nidx = 0, p = tbl->parms.next; p; p = p->next) {
- if (net != p->net)
+ if (net != neigh_parms_net(p))
continue;
if (nidx++ < neigh_skip)
@@ -2254,7 +2260,7 @@ static struct pneigh_entry *pneigh_get_first(struct seq_file *seq)
state->flags |= NEIGH_SEQ_IS_PNEIGH;
for (bucket = 0; bucket <= PNEIGH_HASHMASK; bucket++) {
pn = tbl->phash_buckets[bucket];
- while (pn && (pn->net != net))
+ while (pn && (pneigh_net(pn) != net))
pn = pn->next;
if (pn)
break;
@@ -2277,7 +2283,7 @@ static struct pneigh_entry *pneigh_get_next(struct seq_file *seq,
if (++state->bucket > PNEIGH_HASHMASK)
break;
pn = tbl->phash_buckets[state->bucket];
- while (pn && (pn->net != net))
+ while (pn && (pneigh_net(pn) != net))
pn = pn->next;
if (pn)
break;
@@ -2740,7 +2746,7 @@ int neigh_sysctl_register(struct net_device *dev, struct neigh_parms *p,
neigh_path[NEIGH_CTL_PATH_PROTO].ctl_name = p_id;
t->sysctl_header =
- register_net_sysctl_table(p->net, neigh_path, t->neigh_vars);
+ register_net_sysctl_table(neigh_parms_net(p), neigh_path, t->neigh_vars);
if (!t->sysctl_header)
goto free_procname;
--
1.4.4.4
--
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