diff options
Diffstat (limited to 'net/ipv6/xfrm6_policy.c')
| -rw-r--r-- | net/ipv6/xfrm6_policy.c | 38 |
1 files changed, 38 insertions, 0 deletions
diff --git a/net/ipv6/xfrm6_policy.c b/net/ipv6/xfrm6_policy.c index 3a3c677bc0f..8ec3d45cd1d 100644 --- a/net/ipv6/xfrm6_policy.c +++ b/net/ipv6/xfrm6_policy.c @@ -306,9 +306,26 @@ static void xfrm6_policy_fini(void) xfrm_policy_unregister_afinfo(&xfrm6_policy_afinfo); } +#ifdef CONFIG_SYSCTL +static struct ctl_table xfrm6_policy_table[] = { + { + .ctl_name = CTL_UNNUMBERED, + .procname = "xfrm6_gc_thresh", + .data = &xfrm6_dst_ops.gc_thresh, + .maxlen = sizeof(int), + .mode = 0644, + .proc_handler = proc_dointvec, + }, + { } +}; + +static struct ctl_table_header *sysctl_hdr; +#endif + int __init xfrm6_init(void) { int ret; + unsigned int gc_thresh; ret = xfrm6_policy_init(); if (ret) @@ -317,6 +334,23 @@ int __init xfrm6_init(void) ret = xfrm6_state_init(); if (ret) goto out_policy; + /* + * We need a good default value for the xfrm6 gc threshold. + * In ipv4 we set it to the route hash table size * 8, which + * is half the size of the maximaum route cache for ipv4. It + * would be good to do the same thing for v6, except the table is + * constructed differently here. Here each table for a net namespace + * can have FIB_TABLE_HASHSZ entries, so lets go with the same + * computation that we used for ipv4 here. Also, lets keep the initial + * gc_thresh to a minimum of 1024, since, the ipv6 route cache defaults + * to that as a minimum as well + */ + gc_thresh = FIB6_TABLE_HASHSZ * 8; + xfrm6_dst_ops.gc_thresh = (gc_thresh < 1024) ? 1024 : gc_thresh; +#ifdef CONFIG_SYSCTL + sysctl_hdr = register_net_sysctl_table(&init_net, net_ipv6_ctl_path, + xfrm6_policy_table); +#endif out: return ret; out_policy: @@ -326,6 +360,10 @@ out_policy: void xfrm6_fini(void) { +#ifdef CONFIG_SYSCTL + if (sysctl_hdr) + unregister_net_sysctl_table(sysctl_hdr); +#endif //xfrm6_input_fini(); xfrm6_policy_fini(); xfrm6_state_fini(); |