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   1 #include <linux/sysctl.h>
   2 #include <net/net_namespace.h>
   3 #include <net/xfrm.h>
   4
   5 static void __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                 .ctl_name       = NET_CORE_AEVENT_ETIME,
  17                 .procname       = "xfrm_aevent_etime",
  18                 .maxlen         = sizeof(u32),
  19                 .mode           = 0644,
  20                 .proc_handler   = proc_dointvec
  21         },
  22         {
  23                 .ctl_name       = NET_CORE_AEVENT_RSEQTH,
  24                 .procname       = "xfrm_aevent_rseqth",
  25                 .maxlen         = sizeof(u32),
  26                 .mode           = 0644,
  27                 .proc_handler   = proc_dointvec
  28         },
  29         {
  30                 .ctl_name       = CTL_UNNUMBERED,
  31                 .procname       = "xfrm_larval_drop",
  32                 .maxlen         = sizeof(int),
  33                 .mode           = 0644,
  34                 .proc_handler   = proc_dointvec
  35         },
  36         {
  37                 .ctl_name       = CTL_UNNUMBERED,
  38                 .procname       = "xfrm_acq_expires",
  39                 .maxlen         = sizeof(int),
  40                 .mode           = 0644,
  41                 .proc_handler   = proc_dointvec
  42         },
  43         {}
  44 };
  45
  46 int __net_init xfrm_sysctl_init(struct net *net)
  47 {
  48         struct ctl_table *table;
  49
  50         __xfrm_sysctl_init(net);
  51
  52         table = kmemdup(xfrm_table, sizeof(xfrm_table), GFP_KERNEL);
  53         if (!table)
  54                 goto out_kmemdup;
  55         table[0].data = &net->xfrm.sysctl_aevent_etime;
  56         table[1].data = &net->xfrm.sysctl_aevent_rseqth;
  57         table[2].data = &net->xfrm.sysctl_larval_drop;
  58         table[3].data = &net->xfrm.sysctl_acq_expires;
  59
  60         net->xfrm.sysctl_hdr = register_net_sysctl_table(net, net_core_path, table);
  61         if (!net->xfrm.sysctl_hdr)
  62                 goto out_register;
  63         return 0;
  64
  65 out_register:
  66         kfree(table);
  67 out_kmemdup:
  68         return -ENOMEM;
  69 }
  70
  71 void xfrm_sysctl_fini(struct net *net)
  72 {
  73         struct ctl_table *table;
  74
  75         table = net->xfrm.sysctl_hdr->ctl_table_arg;
  76         unregister_net_sysctl_table(net->xfrm.sysctl_hdr);
  77         kfree(table);
  78 }
  79 #else
  80 int __net_init xfrm_sysctl_init(struct net *net)
  81 {
  82         __xfrm_sysctl_init(net);
  83         return 0;
  84 }
  85 #endif