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   1 #include <linux/sysctl.h>
   2 #include <net/net_namespace.h>
   3 #include <net/xfrm.h>
   4
   5 static void __net_init __xfrm_sysctl_init(struct net *net)
   6 {
   7         net->xfrm.sysctl_aevent_etime = XFRM_AE_ETIME;
   8         net->xfrm.sysctl_aevent_rseqth = XFRM_AE_SEQT_SIZE;
   9         net->xfrm.sysctl_larval_drop = 1;
  10         net->xfrm.sysctl_acq_expires = 30;
  11 }
  12
  13 #ifdef CONFIG_SYSCTL
  14 static struct ctl_table xfrm_table[] = {
  15         {
  16                 .procname       = "xfrm_aevent_etime",
  17                 .maxlen         = sizeof(u32),
  18                 .mode           = 0644,
  19                 .proc_handler   = proc_dointvec
  20         },
  21         {
  22                 .procname       = "xfrm_aevent_rseqth",
  23                 .maxlen         = sizeof(u32),
  24                 .mode           = 0644,
  25                 .proc_handler   = proc_dointvec
  26         },
  27         {
  28                 .procname       = "xfrm_larval_drop",
  29                 .maxlen         = sizeof(int),
  30                 .mode           = 0644,
  31                 .proc_handler   = proc_dointvec
  32         },
  33         {
  34                 .procname       = "xfrm_acq_expires",
  35                 .maxlen         = sizeof(int),
  36                 .mode           = 0644,
  37                 .proc_handler   = proc_dointvec
  38         },
  39         {}
  40 };
  41
  42 int __net_init xfrm_sysctl_init(struct net *net)
  43 {
  44         struct ctl_table *table;
  45
  46         __xfrm_sysctl_init(net);
  47
  48         table = kmemdup(xfrm_table, sizeof(xfrm_table), GFP_KERNEL);
  49         if (!table)
  50                 goto out_kmemdup;
  51         table[0].data = &net->xfrm.sysctl_aevent_etime;
  52         table[1].data = &net->xfrm.sysctl_aevent_rseqth;
  53         table[2].data = &net->xfrm.sysctl_larval_drop;
  54         table[3].data = &net->xfrm.sysctl_acq_expires;
  55
  56         net->xfrm.sysctl_hdr = register_net_sysctl_table(net, net_core_path, table);
  57         if (!net->xfrm.sysctl_hdr)
  58                 goto out_register;
  59         return 0;
  60
  61 out_register:
  62         kfree(table);
  63 out_kmemdup:
  64         return -ENOMEM;
  65 }
  66
  67 void __net_exit xfrm_sysctl_fini(struct net *net)
  68 {
  69         struct ctl_table *table;
  70
  71         table = net->xfrm.sysctl_hdr->ctl_table_arg;
  72         unregister_net_sysctl_table(net->xfrm.sysctl_hdr);
  73         kfree(table);
  74 }
  75 #else
  76 int __net_init xfrm_sysctl_init(struct net *net)
  77 {
  78         __xfrm_sysctl_init(net);
  79         return 0;
  80 }
  81 #endif