linux/net/xfrm/xfrm_sysctl.c
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   1#include <linux/sysctl.h>
   2#include <net/net_namespace.h>
   3#include <net/xfrm.h>
   4
   5static 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
  14static 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
  46int __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
  65out_register:
  66        kfree(table);
  67out_kmemdup:
  68        return -ENOMEM;
  69}
  70
  71void 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
  80int __net_init xfrm_sysctl_init(struct net *net)
  81{
  82        __xfrm_sysctl_init(net);
  83        return 0;
  84}
  85#endif
  86