diff options
| -rw-r--r-- | net/ipv6/route.c | 47 |
1 files changed, 29 insertions, 18 deletions
diff --git a/net/ipv6/route.c b/net/ipv6/route.c index 7ff66ce..fa014d7 100644 --- a/net/ipv6/route.c +++ b/net/ipv6/route.c @@ -97,7 +97,7 @@ static struct rt6_info *rt6_get_route_info(struct net *net, struct in6_addr *gwaddr, int ifindex); #endif -static struct dst_ops ip6_dst_ops = { +static struct dst_ops ip6_dst_ops_template = { .family = AF_INET6, .protocol = __constant_htons(ETH_P_IPV6), .gc = ip6_dst_gc, @@ -113,6 +113,8 @@ static struct dst_ops ip6_dst_ops = { .entries = ATOMIC_INIT(0), }; +static struct dst_ops *ip6_dst_ops; + static void ip6_rt_blackhole_update_pmtu(struct dst_entry *dst, u32 mtu) { } @@ -137,7 +139,6 @@ static struct rt6_info ip6_null_entry_template = { .metrics = { [RTAX_HOPLIMIT - 1] = 255, }, .input = ip6_pkt_discard, .output = ip6_pkt_discard_out, - .ops = &ip6_dst_ops, } }, .rt6i_flags = (RTF_REJECT | RTF_NONEXTHOP), @@ -160,7 +161,6 @@ struct rt6_info ip6_prohibit_entry_template = { .metrics = { [RTAX_HOPLIMIT - 1] = 255, }, .input = ip6_pkt_prohibit, .output = ip6_pkt_prohibit_out, - .ops = &ip6_dst_ops, } }, .rt6i_flags = (RTF_REJECT | RTF_NONEXTHOP), @@ -178,7 +178,6 @@ static struct rt6_info ip6_blk_hole_entry_template = { .metrics = { [RTAX_HOPLIMIT - 1] = 255, }, .input = dst_discard, .output = dst_discard, - .ops = &ip6_dst_ops, } }, .rt6i_flags = (RTF_REJECT | RTF_NONEXTHOP), @@ -191,7 +190,7 @@ static struct rt6_info ip6_blk_hole_entry_template = { /* allocate dst with ip6_dst_ops */ static __inline__ struct rt6_info *ip6_dst_alloc(void) { - return (struct rt6_info *)dst_alloc(&ip6_dst_ops); + return (struct rt6_info *)dst_alloc(ip6_dst_ops); } static void ip6_dst_destroy(struct dst_entry *dst) @@ -1000,18 +999,18 @@ static int ip6_dst_gc(struct dst_ops *ops) unsigned long now = jiffies; if (time_after(last_gc + init_net.ipv6.sysctl.ip6_rt_gc_min_interval, now) && - atomic_read(&ip6_dst_ops.entries) <= init_net.ipv6.sysctl.ip6_rt_max_size) + atomic_read(&ip6_dst_ops->entries) <= init_net.ipv6.sysctl.ip6_rt_max_size) goto out; expire++; fib6_run_gc(expire, &init_net); last_gc = now; - if (atomic_read(&ip6_dst_ops.entries) < ip6_dst_ops.gc_thresh) + if (atomic_read(&ip6_dst_ops->entries) < ip6_dst_ops->gc_thresh) expire = init_net.ipv6.sysctl.ip6_rt_gc_timeout>>1; out: expire -= expire>>init_net.ipv6.sysctl.ip6_rt_gc_elasticity; - return (atomic_read(&ip6_dst_ops.entries) > init_net.ipv6.sysctl.ip6_rt_max_size); + return (atomic_read(&ip6_dst_ops->entries) > init_net.ipv6.sysctl.ip6_rt_max_size); } /* Clean host part of a prefix. Not necessary in radix tree, @@ -2408,7 +2407,7 @@ static int rt6_stats_seq_show(struct seq_file *seq, void *v) net->ipv6.rt6_stats->fib_rt_alloc, net->ipv6.rt6_stats->fib_rt_entries, net->ipv6.rt6_stats->fib_rt_cache, - atomic_read(&ip6_dst_ops.entries), + atomic_read(&ip6_dst_ops->entries), net->ipv6.rt6_stats->fib_discarded_routes); return 0; @@ -2464,7 +2463,7 @@ ctl_table ipv6_route_table_template[] = { { .ctl_name = NET_IPV6_ROUTE_GC_THRESH, .procname = "gc_thresh", - .data = &ip6_dst_ops.gc_thresh, + .data = &ip6_dst_ops_template.gc_thresh, .maxlen = sizeof(int), .mode = 0644, .proc_handler = &proc_dointvec, @@ -2553,8 +2552,7 @@ struct ctl_table *ipv6_route_sysctl_init(struct net *net) if (table) { table[0].data = &net->ipv6.sysctl.flush_delay; - /* table[1].data will be handled when we have - routes per namespace */ + table[1].data = &ip6_dst_ops_template.gc_thresh; table[2].data = &net->ipv6.sysctl.ip6_rt_max_size; table[3].data = &net->ipv6.sysctl.ip6_rt_gc_min_interval; table[4].data = &net->ipv6.sysctl.ip6_rt_gc_timeout; @@ -2580,6 +2578,7 @@ static int ip6_route_net_init(struct net *net) goto out; net->ipv6.ip6_null_entry->u.dst.path = (struct dst_entry *)net->ipv6.ip6_null_entry; + net->ipv6.ip6_null_entry->u.dst.ops = ip6_dst_ops; #ifdef CONFIG_IPV6_MULTIPLE_TABLES net->ipv6.ip6_prohibit_entry = kmemdup(&ip6_prohibit_entry_template, @@ -2591,6 +2590,7 @@ static int ip6_route_net_init(struct net *net) } net->ipv6.ip6_prohibit_entry->u.dst.path = (struct dst_entry *)net->ipv6.ip6_prohibit_entry; + net->ipv6.ip6_prohibit_entry->u.dst.ops = ip6_dst_ops; net->ipv6.ip6_blk_hole_entry = kmemdup(&ip6_blk_hole_entry_template, sizeof(*net->ipv6.ip6_blk_hole_entry), @@ -2602,6 +2602,7 @@ static int ip6_route_net_init(struct net *net) } net->ipv6.ip6_blk_hole_entry->u.dst.path = (struct dst_entry *)net->ipv6.ip6_blk_hole_entry; + net->ipv6.ip6_blk_hole_entry->u.dst.ops = ip6_dst_ops; #endif #ifdef CONFIG_PROC_FS @@ -2640,13 +2641,20 @@ int __init ip6_route_init(void) { int ret; - ip6_dst_ops.kmem_cachep = + ip6_dst_ops = kmemdup(&ip6_dst_ops_template, + sizeof(*ip6_dst_ops), GFP_KERNEL); + if (!ip6_dst_ops) + return -ENOMEM; + + ret = -ENOMEM; + ip6_dst_ops_template.kmem_cachep = kmem_cache_create("ip6_dst_cache", sizeof(struct rt6_info), 0, SLAB_HWCACHE_ALIGN, NULL); - if (!ip6_dst_ops.kmem_cachep) - return -ENOMEM; + if (!ip6_dst_ops_template.kmem_cachep) + goto out_ip6_dst_ops; - ip6_dst_blackhole_ops.kmem_cachep = ip6_dst_ops.kmem_cachep; + ip6_dst_ops->kmem_cachep = ip6_dst_ops_template.kmem_cachep; + ip6_dst_blackhole_ops.kmem_cachep = ip6_dst_ops_template.kmem_cachep; ret = register_pernet_subsys(&ip6_route_net_ops); if (ret) @@ -2697,7 +2705,9 @@ out_fib6_init: out_register_subsys: unregister_pernet_subsys(&ip6_route_net_ops); out_kmem_cache: - kmem_cache_destroy(ip6_dst_ops.kmem_cachep); + kmem_cache_destroy(ip6_dst_ops->kmem_cachep); +out_ip6_dst_ops: + kfree(ip6_dst_ops); goto out; } @@ -2708,5 +2718,6 @@ void ip6_route_cleanup(void) xfrm6_fini(); fib6_gc_cleanup(); unregister_pernet_subsys(&ip6_route_net_ops); - kmem_cache_destroy(ip6_dst_ops.kmem_cachep); + kmem_cache_destroy(ip6_dst_ops->kmem_cachep); + kfree(ip6_dst_ops); } |