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TOMOYO Linux Cross Reference
Linux/net/xfrm/xfrm_sysctl.c

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  1 // SPDX-License-Identifier: GPL-2.0
  2 #include <linux/sysctl.h>
  3 #include <linux/slab.h>
  4 #include <net/net_namespace.h>
  5 #include <net/xfrm.h>
  6 
  7 static void __net_init __xfrm_sysctl_init(struct net *net)
  8 {
  9         net->xfrm.sysctl_aevent_etime = XFRM_AE_ETIME;
 10         net->xfrm.sysctl_aevent_rseqth = XFRM_AE_SEQT_SIZE;
 11         net->xfrm.sysctl_larval_drop = 1;
 12         net->xfrm.sysctl_acq_expires = 30;
 13 }
 14 
 15 #ifdef CONFIG_SYSCTL
 16 static struct ctl_table xfrm_table[] = {
 17         {
 18                 .procname       = "xfrm_aevent_etime",
 19                 .maxlen         = sizeof(u32),
 20                 .mode           = 0644,
 21                 .proc_handler   = proc_douintvec
 22         },
 23         {
 24                 .procname       = "xfrm_aevent_rseqth",
 25                 .maxlen         = sizeof(u32),
 26                 .mode           = 0644,
 27                 .proc_handler   = proc_douintvec
 28         },
 29         {
 30                 .procname       = "xfrm_larval_drop",
 31                 .maxlen         = sizeof(int),
 32                 .mode           = 0644,
 33                 .proc_handler   = proc_dointvec
 34         },
 35         {
 36                 .procname       = "xfrm_acq_expires",
 37                 .maxlen         = sizeof(int),
 38                 .mode           = 0644,
 39                 .proc_handler   = proc_dointvec
 40         },
 41         {}
 42 };
 43 
 44 int __net_init xfrm_sysctl_init(struct net *net)
 45 {
 46         struct ctl_table *table;
 47 
 48         __xfrm_sysctl_init(net);
 49 
 50         table = kmemdup(xfrm_table, sizeof(xfrm_table), GFP_KERNEL);
 51         if (!table)
 52                 goto out_kmemdup;
 53         table[0].data = &net->xfrm.sysctl_aevent_etime;
 54         table[1].data = &net->xfrm.sysctl_aevent_rseqth;
 55         table[2].data = &net->xfrm.sysctl_larval_drop;
 56         table[3].data = &net->xfrm.sysctl_acq_expires;
 57 
 58         /* Don't export sysctls to unprivileged users */
 59         if (net->user_ns != &init_user_ns)
 60                 table[0].procname = NULL;
 61 
 62         net->xfrm.sysctl_hdr = register_net_sysctl(net, "net/core", table);
 63         if (!net->xfrm.sysctl_hdr)
 64                 goto out_register;
 65         return 0;
 66 
 67 out_register:
 68         kfree(table);
 69 out_kmemdup:
 70         return -ENOMEM;
 71 }
 72 
 73 void __net_exit xfrm_sysctl_fini(struct net *net)
 74 {
 75         struct ctl_table *table;
 76 
 77         table = net->xfrm.sysctl_hdr->ctl_table_arg;
 78         unregister_net_sysctl_table(net->xfrm.sysctl_hdr);
 79         kfree(table);
 80 }
 81 #else
 82 int __net_init xfrm_sysctl_init(struct net *net)
 83 {
 84         __xfrm_sysctl_init(net);
 85         return 0;
 86 }
 87 #endif
 88 

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