diff options
Diffstat (limited to 'net/ipv4')
| -rw-r--r-- | net/ipv4/xfrm4_policy.c | 49 |
1 files changed, 46 insertions, 3 deletions
diff --git a/net/ipv4/xfrm4_policy.c b/net/ipv4/xfrm4_policy.c index 0e28383c096f..9a459be24af7 100644 --- a/net/ipv4/xfrm4_policy.c +++ b/net/ipv4/xfrm4_policy.c @@ -262,7 +262,51 @@ static struct ctl_table xfrm4_policy_table[] = { { } }; -static struct ctl_table_header *sysctl_hdr; +static int __net_init xfrm4_net_init(struct net *net) +{ + struct ctl_table *table; + struct ctl_table_header *hdr; + + table = xfrm4_policy_table; + if (!net_eq(net, &init_net)) { + table = kmemdup(table, sizeof(xfrm4_policy_table), GFP_KERNEL); + if (!table) + goto err_alloc; + + table[0].data = &net->xfrm.xfrm4_dst_ops.gc_thresh; + } + + hdr = register_net_sysctl(net, "net/ipv4", table); + if (!hdr) + goto err_reg; + + net->ipv4.xfrm4_hdr = hdr; + return 0; + +err_reg: + if (!net_eq(net, &init_net)) + kfree(table); +err_alloc: + return -ENOMEM; +} + +static void __net_exit xfrm4_net_exit(struct net *net) +{ + struct ctl_table *table; + + if (net->ipv4.xfrm4_hdr == NULL) + return; + + table = net->ipv4.xfrm4_hdr->ctl_table_arg; + unregister_net_sysctl_table(net->ipv4.xfrm4_hdr); + if (!net_eq(net, &init_net)) + kfree(table); +} + +static struct pernet_operations __net_initdata xfrm4_net_ops = { + .init = xfrm4_net_init, + .exit = xfrm4_net_exit, +}; #endif static void __init xfrm4_policy_init(void) @@ -277,8 +321,7 @@ void __init xfrm4_init(void) xfrm4_state_init(); xfrm4_policy_init(); #ifdef CONFIG_SYSCTL - sysctl_hdr = register_net_sysctl(&init_net, "net/ipv4", - xfrm4_policy_table); + register_pernet_subsys(&xfrm4_net_ops); #endif } |