~ [ source navigation ] ~ [ diff markup ] ~ [ identifier search ] ~

TOMOYO Linux Cross Reference
Linux/net/netfilter/nf_conntrack_timestamp.c

Version: ~ [ linux-5.4-rc7 ] ~ [ linux-5.3.10 ] ~ [ linux-5.2.21 ] ~ [ linux-5.1.21 ] ~ [ linux-5.0.21 ] ~ [ linux-4.20.17 ] ~ [ linux-4.19.83 ] ~ [ linux-4.18.20 ] ~ [ linux-4.17.19 ] ~ [ linux-4.16.18 ] ~ [ linux-4.15.18 ] ~ [ linux-4.14.153 ] ~ [ linux-4.13.16 ] ~ [ linux-4.12.14 ] ~ [ linux-4.11.12 ] ~ [ linux-4.10.17 ] ~ [ linux-4.9.200 ] ~ [ linux-4.8.17 ] ~ [ linux-4.7.10 ] ~ [ linux-4.6.7 ] ~ [ linux-4.5.7 ] ~ [ linux-4.4.200 ] ~ [ linux-4.3.6 ] ~ [ linux-4.2.8 ] ~ [ linux-4.1.52 ] ~ [ linux-4.0.9 ] ~ [ linux-3.19.8 ] ~ [ linux-3.18.140 ] ~ [ linux-3.17.8 ] ~ [ linux-3.16.76 ] ~ [ linux-3.15.10 ] ~ [ linux-3.14.79 ] ~ [ linux-3.13.11 ] ~ [ linux-3.12.74 ] ~ [ linux-3.11.10 ] ~ [ linux-3.10.108 ] ~ [ linux-3.9.11 ] ~ [ linux-3.8.13 ] ~ [ linux-3.7.10 ] ~ [ linux-3.6.11 ] ~ [ linux-3.5.7 ] ~ [ linux-3.4.113 ] ~ [ linux-3.3.8 ] ~ [ linux-3.2.102 ] ~ [ linux-3.1.10 ] ~ [ linux-3.0.101 ] ~ [ linux-2.6.32.71 ] ~ [ linux-2.6.0 ] ~ [ linux-2.4.37.11 ] ~ [ unix-v6-master ] ~ [ ccs-tools-1.8.5 ] ~ [ policy-sample ] ~
Architecture: ~ [ i386 ] ~ [ alpha ] ~ [ m68k ] ~ [ mips ] ~ [ ppc ] ~ [ sparc ] ~ [ sparc64 ] ~

  1 /*
  2  * (C) 2010 Pablo Neira Ayuso <pablo@netfilter.org>
  3  *
  4  * This program is free software; you can redistribute it and/or modify
  5  * it under the terms of the GNU General Public License version 2 as
  6  * published by the Free Software Foundation (or any later at your option).
  7  */
  8 
  9 #include <linux/netfilter.h>
 10 #include <linux/slab.h>
 11 #include <linux/kernel.h>
 12 #include <linux/moduleparam.h>
 13 
 14 #include <net/netfilter/nf_conntrack.h>
 15 #include <net/netfilter/nf_conntrack_extend.h>
 16 #include <net/netfilter/nf_conntrack_timestamp.h>
 17 
 18 static bool nf_ct_tstamp __read_mostly;
 19 
 20 module_param_named(tstamp, nf_ct_tstamp, bool, 0644);
 21 MODULE_PARM_DESC(tstamp, "Enable connection tracking flow timestamping.");
 22 
 23 #ifdef CONFIG_SYSCTL
 24 static struct ctl_table tstamp_sysctl_table[] = {
 25         {
 26                 .procname       = "nf_conntrack_timestamp",
 27                 .data           = &init_net.ct.sysctl_tstamp,
 28                 .maxlen         = sizeof(unsigned int),
 29                 .mode           = 0644,
 30                 .proc_handler   = proc_dointvec,
 31         },
 32         {}
 33 };
 34 #endif /* CONFIG_SYSCTL */
 35 
 36 static struct nf_ct_ext_type tstamp_extend __read_mostly = {
 37         .len    = sizeof(struct nf_conn_tstamp),
 38         .align  = __alignof__(struct nf_conn_tstamp),
 39         .id     = NF_CT_EXT_TSTAMP,
 40 };
 41 
 42 #ifdef CONFIG_SYSCTL
 43 static int nf_conntrack_tstamp_init_sysctl(struct net *net)
 44 {
 45         struct ctl_table *table;
 46 
 47         table = kmemdup(tstamp_sysctl_table, sizeof(tstamp_sysctl_table),
 48                         GFP_KERNEL);
 49         if (!table)
 50                 goto out;
 51 
 52         table[0].data = &net->ct.sysctl_tstamp;
 53 
 54         /* Don't export sysctls to unprivileged users */
 55         if (net->user_ns != &init_user_ns)
 56                 table[0].procname = NULL;
 57 
 58         net->ct.tstamp_sysctl_header = register_net_sysctl(net, "net/netfilter",
 59                                                            table);
 60         if (!net->ct.tstamp_sysctl_header) {
 61                 printk(KERN_ERR "nf_ct_tstamp: can't register to sysctl.\n");
 62                 goto out_register;
 63         }
 64         return 0;
 65 
 66 out_register:
 67         kfree(table);
 68 out:
 69         return -ENOMEM;
 70 }
 71 
 72 static void nf_conntrack_tstamp_fini_sysctl(struct net *net)
 73 {
 74         struct ctl_table *table;
 75 
 76         table = net->ct.tstamp_sysctl_header->ctl_table_arg;
 77         unregister_net_sysctl_table(net->ct.tstamp_sysctl_header);
 78         kfree(table);
 79 }
 80 #else
 81 static int nf_conntrack_tstamp_init_sysctl(struct net *net)
 82 {
 83         return 0;
 84 }
 85 
 86 static void nf_conntrack_tstamp_fini_sysctl(struct net *net)
 87 {
 88 }
 89 #endif
 90 
 91 int nf_conntrack_tstamp_pernet_init(struct net *net)
 92 {
 93         net->ct.sysctl_tstamp = nf_ct_tstamp;
 94         return nf_conntrack_tstamp_init_sysctl(net);
 95 }
 96 
 97 void nf_conntrack_tstamp_pernet_fini(struct net *net)
 98 {
 99         nf_conntrack_tstamp_fini_sysctl(net);
100 }
101 
102 int nf_conntrack_tstamp_init(void)
103 {
104         int ret;
105         ret = nf_ct_extend_register(&tstamp_extend);
106         if (ret < 0)
107                 pr_err("nf_ct_tstamp: Unable to register extension\n");
108         return ret;
109 }
110 
111 void nf_conntrack_tstamp_fini(void)
112 {
113         nf_ct_extend_unregister(&tstamp_extend);
114 }
115 

~ [ source navigation ] ~ [ diff markup ] ~ [ identifier search ] ~

kernel.org | git.kernel.org | LWN.net | Project Home | Wiki (Japanese) | Wiki (English) | SVN repository | Mail admin

Linux® is a registered trademark of Linus Torvalds in the United States and other countries.
TOMOYO® is a registered trademark of NTT DATA CORPORATION.

osdn.jp