diff options
Diffstat (limited to 'net/ipv4/xfrm4_policy.c')
| -rw-r--r-- | net/ipv4/xfrm4_policy.c | 37 |
1 files changed, 36 insertions, 1 deletions
diff --git a/net/ipv4/xfrm4_policy.c b/net/ipv4/xfrm4_policy.c index 0071ee6f441f..74fb2eb833ec 100644 --- a/net/ipv4/xfrm4_policy.c +++ b/net/ipv4/xfrm4_policy.c @@ -264,6 +264,22 @@ static struct xfrm_policy_afinfo xfrm4_policy_afinfo = { .fill_dst = xfrm4_fill_dst, }; +#ifdef CONFIG_SYSCTL +static struct ctl_table xfrm4_policy_table[] = { + { + .ctl_name = CTL_UNNUMBERED, + .procname = "xfrm4_gc_thresh", + .data = &xfrm4_dst_ops.gc_thresh, + .maxlen = sizeof(int), + .mode = 0644, + .proc_handler = proc_dointvec, + }, + { } +}; + +static struct ctl_table_header *sysctl_hdr; +#endif + static void __init xfrm4_policy_init(void) { xfrm_policy_register_afinfo(&xfrm4_policy_afinfo); @@ -271,12 +287,31 @@ static void __init xfrm4_policy_init(void) static void __exit xfrm4_policy_fini(void) { +#ifdef CONFIG_SYSCTL + if (sysctl_hdr) + unregister_net_sysctl_table(sysctl_hdr); +#endif xfrm_policy_unregister_afinfo(&xfrm4_policy_afinfo); } -void __init xfrm4_init(void) +void __init xfrm4_init(int rt_max_size) { xfrm4_state_init(); xfrm4_policy_init(); + /* + * Select a default value for the gc_thresh based on the main route + * table hash size. It seems to me the worst case scenario is when + * we have ipsec operating in transport mode, in which we create a + * dst_entry per socket. The xfrm gc algorithm starts trying to remove + * entries at gc_thresh, and prevents new allocations as 2*gc_thresh + * so lets set an initial xfrm gc_thresh value at the rt_max_size/2. + * That will let us store an ipsec connection per route table entry, + * and start cleaning when were 1/2 full + */ + xfrm4_dst_ops.gc_thresh = rt_max_size/2; +#ifdef CONFIG_SYSCTL + sysctl_hdr = register_net_sysctl_table(&init_net, net_ipv4_ctl_path, + xfrm4_policy_table); +#endif } |