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[NETNS][IPV6] rt6_stats - dynamically allocate the routes statistics 

This patch allocates the rt6_stats struct dynamically when the fib6 is
initialized. That provides the ability to create several instances of
this structure for the network namespaces.

Signed-off-by: Daniel Lezcano <dlezcano@fr.ibm.com>
Signed-off-by: Benjamin Thery <benjamin.thery@bull.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Daniel Lezcano 2008-03-03 23:33:43 -08:00 committed by David S. Miller
parent dcabb819a6
commit 6cc118bd50
3 changed files with 20 additions and 12 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
include/net/ipv6.h
View File

@ -611,7 +611,7 @@ extern void ipv6_misc_proc_exit(void);
extern int snmp6_register_dev(struct inet6_dev *idev);
extern int snmp6_unregister_dev(struct inet6_dev *idev);
extern struct rt6_statistics rt6_stats;
extern struct rt6_statistics *rt6_stats;
#else
static inline int snmp6_register_dev(struct inet6_dev *idev)
{

22
net/ipv6/ip6_fib.c
View File

@ -48,7 +48,7 @@
#define RT6_TRACE(x...) do { ; } while (0)
#endif
struct rt6_statistics rt6_stats;
struct rt6_statistics *rt6_stats;
static struct kmem_cache * fib6_node_kmem __read_mostly;
@ -653,10 +653,10 @@ static int fib6_add_rt2node(struct fib6_node *fn, struct rt6_info *rt,
rt->rt6i_node = fn;
atomic_inc(&rt->rt6i_ref);
inet6_rt_notify(RTM_NEWROUTE, rt, info);
rt6_stats.fib_rt_entries++;
rt6_stats->fib_rt_entries++;
if ((fn->fn_flags & RTN_RTINFO) == 0) {
rt6_stats.fib_route_nodes++;
rt6_stats->fib_route_nodes++;
fn->fn_flags |= RTN_RTINFO;
}
@ -1093,8 +1093,8 @@ static void fib6_del_route(struct fib6_node *fn, struct rt6_info **rtp,
/* Unlink it */
*rtp = rt->u.dst.rt6_next;
rt->rt6i_node = NULL;
rt6_stats.fib_rt_entries--;
rt6_stats.fib_discarded_routes++;
rt6_stats->fib_rt_entries--;
rt6_stats->fib_discarded_routes++;
/* Reset round-robin state, if necessary */
if (fn->rr_ptr == rt)
@ -1117,7 +1117,7 @@ static void fib6_del_route(struct fib6_node *fn, struct rt6_info **rtp,
/* If it was last route, expunge its radix tree node */
if (fn->leaf == NULL) {
fn->fn_flags &= ~RTN_RTINFO;
rt6_stats.fib_route_nodes--;
rt6_stats->fib_route_nodes--;
fn = fib6_repair_tree(fn);
}
@ -1556,9 +1556,14 @@ int __init fib6_init(void)
if (!fib6_node_kmem)
goto out;
ret = -ENOMEM;
rt6_stats = kzalloc(sizeof(*rt6_stats), GFP_KERNEL);
if (!rt6_stats)
goto out_kmem_cache_create;
ret = register_pernet_subsys(&fib6_net_ops);
if (ret)
goto out_kmem_cache_create;
goto out_rt6_stats;
ret = __rtnl_register(PF_INET6, RTM_GETROUTE, NULL, inet6_dump_fib);
if (ret)
@ -1568,6 +1573,8 @@ out:
out_unregister_subsys:
unregister_pernet_subsys(&fib6_net_ops);
out_rt6_stats:
kfree(rt6_stats);
out_kmem_cache_create:
kmem_cache_destroy(fib6_node_kmem);
goto out;
@ -1576,5 +1583,6 @@ out_kmem_cache_create:
void fib6_gc_cleanup(void)
{
unregister_pernet_subsys(&fib6_net_ops);
kfree(rt6_stats);
kmem_cache_destroy(fib6_node_kmem);
}

8
net/ipv6/route.c
View File

@ -2354,11 +2354,11 @@ static const struct file_operations ipv6_route_proc_fops = {
static int rt6_stats_seq_show(struct seq_file *seq, void *v)
{
seq_printf(seq, "%04x %04x %04x %04x %04x %04x %04x\n",
rt6_stats.fib_nodes, rt6_stats.fib_route_nodes,
rt6_stats.fib_rt_alloc, rt6_stats.fib_rt_entries,
rt6_stats.fib_rt_cache,
rt6_stats->fib_nodes, rt6_stats->fib_route_nodes,
rt6_stats->fib_rt_alloc, rt6_stats->fib_rt_entries,
rt6_stats->fib_rt_cache,
atomic_read(&ip6_dst_ops.entries),
rt6_stats.fib_discarded_routes);
rt6_stats->fib_discarded_routes);
return 0;
}