linux/net/xfrm/xfrm_sysctl.c
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   1#include <linux/sysctl.h>
   2#include <linux/slab.h>
   3#include <net/net_namespace.h>
   4#include <net/xfrm.h>
   5
   6static void __net_init __xfrm_sysctl_init(struct net *net)
   7{
   8        net->xfrm.sysctl_aevent_etime = XFRM_AE_ETIME;
   9        net->xfrm.sysctl_aevent_rseqth = XFRM_AE_SEQT_SIZE;
  10        net->xfrm.sysctl_larval_drop = 1;
  11        net->xfrm.sysctl_acq_expires = 30;
  12}
  13
  14#ifdef CONFIG_SYSCTL
  15static struct ctl_table xfrm_table[] = {
  16        {
  17                .procname       = "xfrm_aevent_etime",
  18                .maxlen         = sizeof(u32),
  19                .mode           = 0644,
  20                .proc_handler   = proc_dointvec
  21        },
  22        {
  23                .procname       = "xfrm_aevent_rseqth",
  24                .maxlen         = sizeof(u32),
  25                .mode           = 0644,
  26                .proc_handler   = proc_dointvec
  27        },
  28        {
  29                .procname       = "xfrm_larval_drop",
  30                .maxlen         = sizeof(int),
  31                .mode           = 0644,
  32                .proc_handler   = proc_dointvec
  33        },
  34        {
  35                .procname       = "xfrm_acq_expires",
  36                .maxlen         = sizeof(int),
  37                .mode           = 0644,
  38                .proc_handler   = proc_dointvec
  39        },
  40        {}
  41};
  42
  43int __net_init xfrm_sysctl_init(struct net *net)
  44{
  45        struct ctl_table *table;
  46
  47        __xfrm_sysctl_init(net);
  48
  49        table = kmemdup(xfrm_table, sizeof(xfrm_table), GFP_KERNEL);
  50        if (!table)
  51                goto out_kmemdup;
  52        table[0].data = &net->xfrm.sysctl_aevent_etime;
  53        table[1].data = &net->xfrm.sysctl_aevent_rseqth;
  54        table[2].data = &net->xfrm.sysctl_larval_drop;
  55        table[3].data = &net->xfrm.sysctl_acq_expires;
  56
  57        net->xfrm.sysctl_hdr = register_net_sysctl(net, "net/core", table);
  58        if (!net->xfrm.sysctl_hdr)
  59                goto out_register;
  60        return 0;
  61
  62out_register:
  63        kfree(table);
  64out_kmemdup:
  65        return -ENOMEM;
  66}
  67
  68void __net_exit xfrm_sysctl_fini(struct net *net)
  69{
  70        struct ctl_table *table;
  71
  72        table = net->xfrm.sysctl_hdr->ctl_table_arg;
  73        unregister_net_sysctl_table(net->xfrm.sysctl_hdr);
  74        kfree(table);
  75}
  76#else
  77int __net_init xfrm_sysctl_init(struct net *net)
  78{
  79        __xfrm_sysctl_init(net);
  80        return 0;
  81}
  82#endif
  83
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