[patch 03/10][NETNS][IP6_FIB] move the fib table to the network
namespace
Daniel Lezcano
dlezcano at fr.ibm.com
Thu Nov 15 06:01:46 PST 2007
Move the global definition to the fib table to the network namespace
structure and make their access to the initial network namespace.
Signed-off-by: Daniel Lezcano <dlezcano at fr.ibm.com>
Signed-off-by: Benjamin Thery <benjamin.thery at bull.net>
---
include/net/net_namespace.h | 9 +++
net/ipv6/ip6_fib.c | 110 ++++++++++++++++++++++++++++----------------
2 files changed, 80 insertions(+), 39 deletions(-)
Index: linux-2.6-netns/include/net/net_namespace.h
===================================================================
--- linux-2.6-netns.orig/include/net/net_namespace.h
+++ linux-2.6-netns/include/net/net_namespace.h
@@ -31,6 +31,15 @@ struct net {
struct hlist_head *dev_name_head;
struct hlist_head *dev_index_head;
+ /* ipv6 routing table */
+#ifdef CONFIG_IPV6
+ struct hlist_head *fib_table_hash;
+ struct fib6_table *fib6_main_tbl;
+#ifdef CONFIG_IPV6_MULTIPLE_TABLES
+ struct fib6_table *fib6_local_tbl;
+#endif /* CONFIG_IPV6_MULTIPLE_TABLES */
+#endif /* CONFIG_IPV6 */
+
struct sock *rtnl; /* rtnetlink socket */
/* List of all packet sockets. */
Index: linux-2.6-netns/net/ipv6/ip6_fib.c
===================================================================
--- linux-2.6-netns.orig/net/ipv6/ip6_fib.c
+++ linux-2.6-netns/net/ipv6/ip6_fib.c
@@ -166,14 +166,11 @@ static __inline__ void rt6_release(struc
dst_free(&rt->u.dst);
}
-static struct fib6_table *fib6_main_tbl;
-
#ifdef CONFIG_IPV6_MULTIPLE_TABLES
#define FIB_TABLE_HASHSZ 256
#else
#define FIB_TABLE_HASHSZ 1
#endif
-static struct hlist_head *fib_table_hash;
static void fib6_link_table(struct fib6_table *tb)
{
@@ -191,13 +188,11 @@ static void fib6_link_table(struct fib6_
* No protection necessary, this is the only list mutatation
* operation, tables never disappear once they exist.
*/
- hlist_add_head_rcu(&tb->tb6_hlist, &fib_table_hash[h]);
+ hlist_add_head_rcu(&tb->tb6_hlist, &init_net.fib_table_hash[h]);
}
#ifdef CONFIG_IPV6_MULTIPLE_TABLES
-static struct fib6_table *fib6_local_tbl;
-
static struct fib6_table *fib6_alloc_table(u32 id)
{
struct fib6_table *table;
@@ -232,6 +227,7 @@ struct fib6_table *fib6_new_table(u32 id
struct fib6_table *fib6_get_table(u32 id)
{
struct fib6_table *tb;
+ struct hlist_head *head;
struct hlist_node *node;
unsigned int h;
@@ -239,7 +235,8 @@ struct fib6_table *fib6_get_table(u32 id
id = RT6_TABLE_MAIN;
h = id & (FIB_TABLE_HASHSZ - 1);
rcu_read_lock();
- hlist_for_each_entry_rcu(tb, node, &fib_table_hash[h], tb6_hlist) {
+ head = &init_net.fib_table_hash[h];
+ hlist_for_each_entry_rcu(tb, node, head, tb6_hlist) {
if (tb->tb6_id == id) {
rcu_read_unlock();
return tb;
@@ -252,8 +249,8 @@ struct fib6_table *fib6_get_table(u32 id
static void __init fib6_tables_init(void)
{
- fib6_link_table(fib6_main_tbl);
- fib6_link_table(fib6_local_tbl);
+ fib6_link_table(init_net.fib6_main_tbl);
+ fib6_link_table(init_net.fib6_local_tbl);
}
#else
@@ -265,18 +262,18 @@ struct fib6_table *fib6_new_table(u32 id
struct fib6_table *fib6_get_table(u32 id)
{
- return fib6_main_tbl;
+ return init_net.fib6_main_tbl;
}
struct dst_entry *fib6_rule_lookup(struct flowi *fl, int flags,
pol_lookup_t lookup)
{
- return (struct dst_entry *) lookup(fib6_main_tbl, fl, flags);
+ return (struct dst_entry *) lookup(init_net.fib6_main_tbl, fl, flags);
}
static void __init fib6_tables_init(void)
{
- fib6_link_table(fib6_main_tbl);
+ fib6_link_table(init_net.fib6_main_tbl);
}
#endif
@@ -357,6 +354,7 @@ static int inet6_dump_fib(struct sk_buff
struct fib6_walker_t *w;
struct fib6_table *tb;
struct hlist_node *node;
+ struct hlist_head *head;
int res = 0;
if (net != &init_net)
@@ -390,7 +388,8 @@ static int inet6_dump_fib(struct sk_buff
for (h = s_h; h < FIB_TABLE_HASHSZ; h++, s_e = 0) {
e = 0;
- hlist_for_each_entry(tb, node, &fib_table_hash[h], tb6_hlist) {
+ head = &init_net.fib_table_hash[h];
+ hlist_for_each_entry(tb, node, head, tb6_hlist) {
if (e < s_e)
goto next;
res = fib6_dump_table(tb, skb, cb);
@@ -1358,12 +1357,13 @@ void fib6_clean_all(int (*func)(struct r
{
struct fib6_table *table;
struct hlist_node *node;
+ struct hlist_head *head;
unsigned int h;
rcu_read_lock();
for (h = 0; h < FIB_TABLE_HASHSZ; h++) {
- hlist_for_each_entry_rcu(table, node, &fib_table_hash[h],
- tb6_hlist) {
+ head = &init_net.fib_table_hash[h];
+ hlist_for_each_entry_rcu(table, node, head, tb6_hlist) {
write_lock_bh(&table->tb6_lock);
fib6_clean_tree(&table->tb6_root, func, prune, arg);
write_unlock_bh(&table->tb6_lock);
@@ -1462,42 +1462,74 @@ void fib6_run_gc(unsigned long dummy)
spin_unlock_bh(&fib6_gc_lock);
}
-void __init fib6_init(void)
+static int fib6_net_init(struct net *net)
{
- fib6_node_kmem = kmem_cache_create("fib6_nodes",
- sizeof(struct fib6_node),
- 0, SLAB_HWCACHE_ALIGN|SLAB_PANIC,
- NULL);
+ int ret;
- fib_table_hash = kzalloc(sizeof(*fib_table_hash)*FIB_TABLE_HASHSZ, GFP_KERNEL);
- if (!fib_table_hash)
- panic("IPV6: Failed to allocate fib_table_hash.\n");
-
- fib6_main_tbl = kzalloc(sizeof(*fib6_main_tbl), GFP_KERNEL);
- if (!fib6_main_tbl)
- panic("IPV6: Failed to allocate fib6_main_tbl.\n");
-
- fib6_main_tbl->tb6_id = RT6_TABLE_MAIN;
- fib6_main_tbl->tb6_root.leaf = &ip6_null_entry;
- fib6_main_tbl->tb6_root.fn_flags = RTN_ROOT | RTN_TL_ROOT | RTN_RTINFO;
+ if (net != &init_net)
+ return -EPERM;
+
+ ret = -ENOMEM;
+ net->fib_table_hash = kzalloc(sizeof(*net->fib_table_hash)*FIB_TABLE_HASHSZ,
+ GFP_KERNEL);
+ if (!net->fib_table_hash)
+ goto out;
+
+ net->fib6_main_tbl = kzalloc(sizeof(*net->fib6_main_tbl), GFP_KERNEL);
+ if (!net->fib6_main_tbl)
+ goto out_fib6_main_tbl;
+
+ net->fib6_main_tbl->tb6_id = RT6_TABLE_MAIN;
+ net->fib6_main_tbl->tb6_root.leaf = &ip6_null_entry;
+ net->fib6_main_tbl->tb6_root.fn_flags = RTN_ROOT | RTN_TL_ROOT | RTN_RTINFO;
#ifdef CONFIG_IPV6_MULTIPLE_TABLES
- fib6_local_tbl = kzalloc(sizeof(*fib6_local_tbl), GFP_KERNEL);
- if (!fib6_local_tbl)
- panic("IPV6: Failed to allocate fib6_local_tbl.\n");
-
- fib6_local_tbl->tb6_id = RT6_TABLE_LOCAL;
- fib6_local_tbl->tb6_root.leaf = &ip6_null_entry;
- fib6_local_tbl->tb6_root.fn_flags = RTN_ROOT | RTN_TL_ROOT | RTN_RTINFO;
+ net->fib6_local_tbl = kzalloc(sizeof(*net->fib6_local_tbl), GFP_KERNEL);
+ if (!net->fib6_local_tbl) {
+ kfree(net->fib6_main_tbl);
+ goto out_fib6_main_tbl;
+ }
+ net->fib6_local_tbl->tb6_id = RT6_TABLE_LOCAL;
+ net->fib6_local_tbl->tb6_root.leaf = &ip6_null_entry;
+ net->fib6_local_tbl->tb6_root.fn_flags = RTN_ROOT | RTN_TL_ROOT | RTN_RTINFO;
#endif
fib6_tables_init();
- __rtnl_register(PF_INET6, RTM_GETROUTE, NULL, inet6_dump_fib);
+out_fib6_main_tbl:
+ kfree(net->fib_table_hash);
+out:
+ return ret;
+ }
+
+static void fib6_net_exit(struct net *net)
+{
+#ifdef CONFIG_IPV6_MULTIPLE_TABLES
+ kfree(net->fib6_local_tbl);
+#endif
+ kfree(net->fib6_main_tbl);
+ kfree(net->fib_table_hash);
+}
+
+static struct pernet_operations fib6_net_ops = {
+ .init = fib6_net_init,
+ .exit = fib6_net_exit,
+};
+
+void __init fib6_init(void)
+{
+ fib6_node_kmem = kmem_cache_create("fib6_nodes",
+ sizeof(struct fib6_node),
+ 0, SLAB_HWCACHE_ALIGN|SLAB_PANIC,
+ NULL);
+
+ register_pernet_subsys(&fib6_net_ops);
+ __rtnl_register(PF_INET6, RTM_GETROUTE, NULL, inet6_dump_fib);
}
void fib6_gc_cleanup(void)
{
del_timer(&ip6_fib_timer);
+ unregister_pernet_subsys(&fib6_net_ops);
kmem_cache_destroy(fib6_node_kmem);
}
--
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