[Devel] [PATCH net-2.6.25 14/19] [NETNS] Place fib tables into netns.
Denis V. Lunev
den at openvz.org
Wed Dec 19 07:24:44 PST 2007
The preparatory work has been done. All we need is to substitute
fib_table_hash with net->ipv4.fib_table_hash. Netns context is available when
required.
Acked-by: Benjamin Thery <benjamin.thery at bull.net>
Signed-off-by: Denis V. Lunev <den at openvz.org>
---
include/net/ip_fib.h | 7 ++-----
include/net/netns/ipv4.h | 2 ++
net/ipv4/fib_frontend.c | 36 ++++++++++++++++++++++++------------
3 files changed, 28 insertions(+), 17 deletions(-)
diff --git a/include/net/ip_fib.h b/include/net/ip_fib.h
index 1faad1f..ddb4c20 100644
--- a/include/net/ip_fib.h
+++ b/include/net/ip_fib.h
@@ -120,8 +120,6 @@ struct fib_result_nl {
int err;
};
-extern struct hlist_head fib_table_hash[];
-
#ifdef CONFIG_IP_ROUTE_MULTIPATH
#define FIB_RES_NH(res) ((res).fi->fib_nh[(res).nh_sel])
@@ -169,9 +167,8 @@ static inline struct fib_table *fib_get_table(struct net *net, u32 id)
{
struct hlist_head *ptr;
- ptr = id == RT_TABLE_LOCAL ?
- &fib_table_hash[TABLE_LOCAL_INDEX] :
- &fib_table_hash[TABLE_MAIN_INDEX];
+ ptr = net->ipv4.fib_table_hash;
+ ptr += id == RT_TABLE_LOCAL ? TABLE_LOCAL_INDEX : TABLE_MAIN_INDEX;
return hlist_entry(ptr->first, struct fib_table, tb_hlist);
}
diff --git a/include/net/netns/ipv4.h b/include/net/netns/ipv4.h
index 299f8c6..629ec6c 100644
--- a/include/net/netns/ipv4.h
+++ b/include/net/netns/ipv4.h
@@ -8,6 +8,7 @@
struct ctl_table_header;
struct ipv4_devconf;
struct fib_rules_ops;
+struct hlist_head;
struct netns_ipv4 {
struct ctl_table_header *forw_hdr;
@@ -16,5 +17,6 @@ struct netns_ipv4 {
#ifdef CONFIG_IP_MULTIPLE_TABLES
struct fib_rules_ops *rules_ops;
#endif
+ struct hlist_head *fib_table_hash;
};
#endif
diff --git a/net/ipv4/fib_frontend.c b/net/ipv4/fib_frontend.c
index 08414eb..2e150ae 100644
--- a/net/ipv4/fib_frontend.c
+++ b/net/ipv4/fib_frontend.c
@@ -50,7 +50,6 @@
#define FFprint(a...) printk(KERN_DEBUG a)
static struct sock *fibnl;
-struct hlist_head fib_table_hash[FIB_TABLE_HASHSZ];
#ifndef CONFIG_IP_MULTIPLE_TABLES
@@ -67,9 +66,9 @@ static int __net_init fib4_rules_init(struct net *net)
goto fail;
hlist_add_head_rcu(&local_table->tb_hlist,
- &fib_table_hash[TABLE_LOCAL_INDEX]);
+ &net->ipv4.fib_table_hash[TABLE_LOCAL_INDEX]);
hlist_add_head_rcu(&main_table->tb_hlist,
- &fib_table_hash[TABLE_MAIN_INDEX]);
+ &net->ipv4.fib_table_hash[TABLE_MAIN_INDEX]);
return 0;
fail:
@@ -92,7 +91,7 @@ struct fib_table *fib_new_table(struct net *net, u32 id)
if (!tb)
return NULL;
h = id & (FIB_TABLE_HASHSZ - 1);
- hlist_add_head_rcu(&tb->tb_hlist, &fib_table_hash[h]);
+ hlist_add_head_rcu(&tb->tb_hlist, &net->ipv4.fib_table_hash[h]);
return tb;
}
@@ -100,13 +99,16 @@ struct fib_table *fib_get_table(struct net *net, u32 id)
{
struct fib_table *tb;
struct hlist_node *node;
+ struct hlist_head *head;
unsigned int h;
if (id == 0)
id = RT_TABLE_MAIN;
h = id & (FIB_TABLE_HASHSZ - 1);
+
rcu_read_lock();
- hlist_for_each_entry_rcu(tb, node, &fib_table_hash[h], tb_hlist) {
+ head = net->ipv4.fib_table_hash + h;
+ hlist_for_each_entry_rcu(tb, node, head, tb_hlist) {
if (tb->tb_id == id) {
rcu_read_unlock();
return tb;
@@ -117,15 +119,17 @@ struct fib_table *fib_get_table(struct net *net, u32 id)
}
#endif /* CONFIG_IP_MULTIPLE_TABLES */
-static void fib_flush(void)
+static void fib_flush(struct net *net)
{
int flushed = 0;
struct fib_table *tb;
struct hlist_node *node;
+ struct hlist_head *head;
unsigned int h;
for (h = 0; h < FIB_TABLE_HASHSZ; h++) {
- hlist_for_each_entry(tb, node, &fib_table_hash[h], tb_hlist)
+ head = net->ipv4.fib_table_hash + h;
+ hlist_for_each_entry(tb, node, head, tb_hlist)
flushed += tb->tb_flush(tb);
}
@@ -620,6 +624,7 @@ static int inet_dump_fib(struct sk_buff *skb, struct netlink_callback *cb)
unsigned int e = 0, s_e;
struct fib_table *tb;
struct hlist_node *node;
+ struct hlist_head *head;
int dumped = 0;
if (net != &init_net)
@@ -634,7 +639,8 @@ static int inet_dump_fib(struct sk_buff *skb, struct netlink_callback *cb)
for (h = s_h; h < FIB_TABLE_HASHSZ; h++, s_e = 0) {
e = 0;
- hlist_for_each_entry(tb, node, &fib_table_hash[h], tb_hlist) {
+ head = net->ipv4.fib_table_hash + h;
+ hlist_for_each_entry(tb, node, head, tb_hlist) {
if (e < s_e)
goto next;
if (dumped)
@@ -797,7 +803,7 @@ static void fib_del_ifaddr(struct in_ifaddr *ifa)
for stray nexthop entries, then ignite fib_flush.
*/
if (fib_sync_down(ifa->ifa_local, NULL, 0))
- fib_flush();
+ fib_flush(&init_net);
}
}
#undef LOCAL_OK
@@ -877,7 +883,7 @@ static void nl_fib_lookup_exit(struct net *net)
static void fib_disable_ip(struct net_device *dev, int force)
{
if (fib_sync_down(0, dev, force))
- fib_flush();
+ fib_flush(&init_net);
rt_cache_flush(0);
arp_ifdown(dev);
}
@@ -958,8 +964,13 @@ static int __net_init ip_fib_net_init(struct net *net)
{
unsigned int i;
+ net->ipv4.fib_table_hash = kzalloc(
+ sizeof(struct hlist_head)*FIB_TABLE_HASHSZ, GFP_KERNEL);
+ if (net->ipv4.fib_table_hash == NULL)
+ return -ENOMEM;
+
for (i = 0; i < FIB_TABLE_HASHSZ; i++)
- INIT_HLIST_HEAD(&fib_table_hash[i]);
+ INIT_HLIST_HEAD(&net->ipv4.fib_table_hash[i]);
return fib4_rules_init(net);
}
@@ -977,13 +988,14 @@ static void __net_exit ip_fib_net_exit(struct net *net)
struct hlist_head *head;
struct hlist_node *node, *tmp;
- head = &fib_table_hash[i];
+ head = &net->ipv4.fib_table_hash[i];
hlist_for_each_entry_safe(tb, node, tmp, head, tb_hlist) {
hlist_del(node);
tb->tb_flush(tb);
kfree(tb);
}
}
+ kfree(net->ipv4.fib_table_hash);
}
static int __net_init fib_net_init(struct net *net)
--
1.5.3.rc5
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