net/ipv6/proc.c

   1 /*
   2  * INET         An implementation of the TCP/IP protocol suite for the LINUX
   3  *              operating system.  INET is implemented using the  BSD Socket
   4  *              interface as the means of communication with the user level.
   5  *
   6  *              This file implements the various access functions for the
   7  *              PROC file system.  This is very similar to the IPv4 version,
   8  *              except it reports the sockets in the INET6 address family.
   9  *
  10  * Authors:     David S. Miller (davem@caip.rutgers.edu)
  11  *              YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org>
  12  *
  13  *              This program is free software; you can redistribute it and/or
  14  *              modify it under the terms of the GNU General Public License
  15  *              as published by the Free Software Foundation; either version
  16  *              2 of the License, or (at your option) any later version.
  17  */
  18 #include <linux/socket.h>
  19 #include <linux/net.h>
  20 #include <linux/ipv6.h>
  21 #include <linux/proc_fs.h>
  22 #include <linux/seq_file.h>
  23 #include <linux/stddef.h>
  24 #include <net/net_namespace.h>
  25 #include <net/ip.h>
  26 #include <net/sock.h>
  27 #include <net/tcp.h>
  28 #include <net/udp.h>
  29 #include <net/transp_v6.h>
  30 #include <net/ipv6.h>
  31
  32 static int sockstat6_seq_show(struct seq_file *seq, void *v)
  33 {
  34         struct net *net = seq->private;
  35
  36         seq_printf(seq, "TCP6: inuse %d\n",
  37                        sock_prot_inuse_get(net, &tcpv6_prot));
  38         seq_printf(seq, "UDP6: inuse %d\n",
  39                        sock_prot_inuse_get(net, &udpv6_prot));
  40         seq_printf(seq, "UDPLITE6: inuse %d\n",
  41                         sock_prot_inuse_get(net, &udplitev6_prot));
  42         seq_printf(seq, "RAW6: inuse %d\n",
  43                        sock_prot_inuse_get(net, &rawv6_prot));
  44         seq_printf(seq, "FRAG6: inuse %d memory %d\n",
  45                        ip6_frag_nqueues(net), ip6_frag_mem(net));
  46         return 0;
  47 }
  48
  49 static int sockstat6_seq_open(struct inode *inode, struct file *file)
  50 {
  51         return single_open_net(inode, file, sockstat6_seq_show);
  52 }
  53
  54 static const struct file_operations sockstat6_seq_fops = {
  55         .owner   = THIS_MODULE,
  56         .open    = sockstat6_seq_open,
  57         .read    = seq_read,
  58         .llseek  = seq_lseek,
  59         .release = single_release_net,
  60 };
  61
  62 static const struct snmp_mib snmp6_ipstats_list[] = {
  63 /* ipv6 mib according to RFC 2465 */
  64         SNMP_MIB_ITEM("Ip6InReceives", IPSTATS_MIB_INPKTS),
  65         SNMP_MIB_ITEM("Ip6InHdrErrors", IPSTATS_MIB_INHDRERRORS),
  66         SNMP_MIB_ITEM("Ip6InTooBigErrors", IPSTATS_MIB_INTOOBIGERRORS),
  67         SNMP_MIB_ITEM("Ip6InNoRoutes", IPSTATS_MIB_INNOROUTES),
  68         SNMP_MIB_ITEM("Ip6InAddrErrors", IPSTATS_MIB_INADDRERRORS),
  69         SNMP_MIB_ITEM("Ip6InUnknownProtos", IPSTATS_MIB_INUNKNOWNPROTOS),
  70         SNMP_MIB_ITEM("Ip6InTruncatedPkts", IPSTATS_MIB_INTRUNCATEDPKTS),
  71         SNMP_MIB_ITEM("Ip6InDiscards", IPSTATS_MIB_INDISCARDS),
  72         SNMP_MIB_ITEM("Ip6InDelivers", IPSTATS_MIB_INDELIVERS),
  73         SNMP_MIB_ITEM("Ip6OutForwDatagrams", IPSTATS_MIB_OUTFORWDATAGRAMS),
  74         SNMP_MIB_ITEM("Ip6OutRequests", IPSTATS_MIB_OUTPKTS),
  75         SNMP_MIB_ITEM("Ip6OutDiscards", IPSTATS_MIB_OUTDISCARDS),
  76         SNMP_MIB_ITEM("Ip6OutNoRoutes", IPSTATS_MIB_OUTNOROUTES),
  77         SNMP_MIB_ITEM("Ip6ReasmTimeout", IPSTATS_MIB_REASMTIMEOUT),
  78         SNMP_MIB_ITEM("Ip6ReasmReqds", IPSTATS_MIB_REASMREQDS),
  79         SNMP_MIB_ITEM("Ip6ReasmOKs", IPSTATS_MIB_REASMOKS),
  80         SNMP_MIB_ITEM("Ip6ReasmFails", IPSTATS_MIB_REASMFAILS),
  81         SNMP_MIB_ITEM("Ip6FragOKs", IPSTATS_MIB_FRAGOKS),
  82         SNMP_MIB_ITEM("Ip6FragFails", IPSTATS_MIB_FRAGFAILS),
  83         SNMP_MIB_ITEM("Ip6FragCreates", IPSTATS_MIB_FRAGCREATES),
  84         SNMP_MIB_ITEM("Ip6InMcastPkts", IPSTATS_MIB_INMCASTPKTS),
  85         SNMP_MIB_ITEM("Ip6OutMcastPkts", IPSTATS_MIB_OUTMCASTPKTS),
  86         SNMP_MIB_ITEM("Ip6InOctets", IPSTATS_MIB_INOCTETS),
  87         SNMP_MIB_ITEM("Ip6OutOctets", IPSTATS_MIB_OUTOCTETS),
  88         SNMP_MIB_ITEM("Ip6InMcastOctets", IPSTATS_MIB_INMCASTOCTETS),
  89         SNMP_MIB_ITEM("Ip6OutMcastOctets", IPSTATS_MIB_OUTMCASTOCTETS),
  90         SNMP_MIB_ITEM("Ip6InBcastOctets", IPSTATS_MIB_INBCASTOCTETS),
  91         SNMP_MIB_ITEM("Ip6OutBcastOctets", IPSTATS_MIB_OUTBCASTOCTETS),
  92         SNMP_MIB_SENTINEL
  93 };
  94
  95 static const struct snmp_mib snmp6_icmp6_list[] = {
  96 /* icmpv6 mib according to RFC 2466 */
  97         SNMP_MIB_ITEM("Icmp6InMsgs", ICMP6_MIB_INMSGS),
  98         SNMP_MIB_ITEM("Icmp6InErrors", ICMP6_MIB_INERRORS),
  99         SNMP_MIB_ITEM("Icmp6OutMsgs", ICMP6_MIB_OUTMSGS),
 100         SNMP_MIB_ITEM("Icmp6OutErrors", ICMP6_MIB_OUTERRORS),
 101         SNMP_MIB_SENTINEL
 102 };
 103
 104 /* RFC 4293 v6 ICMPMsgStatsTable; named items for RFC 2466 compatibility */
 105 static const char *const icmp6type2name[256] = {
 106         [ICMPV6_DEST_UNREACH] = "DestUnreachs",
 107         [ICMPV6_PKT_TOOBIG] = "PktTooBigs",
 108         [ICMPV6_TIME_EXCEED] = "TimeExcds",
 109         [ICMPV6_PARAMPROB] = "ParmProblems",
 110         [ICMPV6_ECHO_REQUEST] = "Echos",
 111         [ICMPV6_ECHO_REPLY] = "EchoReplies",
 112         [ICMPV6_MGM_QUERY] = "GroupMembQueries",
 113         [ICMPV6_MGM_REPORT] = "GroupMembResponses",
 114         [ICMPV6_MGM_REDUCTION] = "GroupMembReductions",
 115         [ICMPV6_MLD2_REPORT] = "MLDv2Reports",
 116         [NDISC_ROUTER_ADVERTISEMENT] = "RouterAdvertisements",
 117         [NDISC_ROUTER_SOLICITATION] = "RouterSolicits",
 118         [NDISC_NEIGHBOUR_ADVERTISEMENT] = "NeighborAdvertisements",
 119         [NDISC_NEIGHBOUR_SOLICITATION] = "NeighborSolicits",
 120         [NDISC_REDIRECT] = "Redirects",
 121 };
 122
 123
 124 static const struct snmp_mib snmp6_udp6_list[] = {
 125         SNMP_MIB_ITEM("Udp6InDatagrams", UDP_MIB_INDATAGRAMS),
 126         SNMP_MIB_ITEM("Udp6NoPorts", UDP_MIB_NOPORTS),
 127         SNMP_MIB_ITEM("Udp6InErrors", UDP_MIB_INERRORS),
 128         SNMP_MIB_ITEM("Udp6OutDatagrams", UDP_MIB_OUTDATAGRAMS),
 129         SNMP_MIB_SENTINEL
 130 };
 131
 132 static const struct snmp_mib snmp6_udplite6_list[] = {
 133         SNMP_MIB_ITEM("UdpLite6InDatagrams", UDP_MIB_INDATAGRAMS),
 134         SNMP_MIB_ITEM("UdpLite6NoPorts", UDP_MIB_NOPORTS),
 135         SNMP_MIB_ITEM("UdpLite6InErrors", UDP_MIB_INERRORS),
 136         SNMP_MIB_ITEM("UdpLite6OutDatagrams", UDP_MIB_OUTDATAGRAMS),
 137         SNMP_MIB_SENTINEL
 138 };
 139
 140 static void snmp6_seq_show_icmpv6msg(struct seq_file *seq, void __percpu **mib)
 141 {
 142         char name[32];
 143         int i;
 144
 145         /* print by name -- deprecated items */
 146         for (i = 0; i < ICMP6MSG_MIB_MAX; i++) {
 147                 int icmptype;
 148                 const char *p;
 149
 150                 icmptype = i & 0xff;
 151                 p = icmp6type2name[icmptype];
 152                 if (!p) /* don't print un-named types here */
 153                         continue;
 154                 snprintf(name, sizeof(name), "Icmp6%s%s",
 155                         i & 0x100 ? "Out" : "In", p);
 156                 seq_printf(seq, "%-32s\t%lu\n", name,
 157                         snmp_fold_field(mib, i));
 158         }
 159
 160         /* print by number (nonzero only) - ICMPMsgStat format */
 161         for (i = 0; i < ICMP6MSG_MIB_MAX; i++) {
 162                 unsigned long val;
 163
 164                 val = snmp_fold_field(mib, i);
 165                 if (!val)
 166                         continue;
 167                 snprintf(name, sizeof(name), "Icmp6%sType%u",
 168                         i & 0x100 ?  "Out" : "In", i & 0xff);
 169                 seq_printf(seq, "%-32s\t%lu\n", name, val);
 170         }
 171 }
 172
 173 static void snmp6_seq_show_item(struct seq_file *seq, void __percpu **mib,
 174                                 const struct snmp_mib *itemlist)
 175 {
 176         int i;
 177
 178         for (i = 0; itemlist[i].name; i++)
 179                 seq_printf(seq, "%-32s\t%lu\n", itemlist[i].name,
 180                            snmp_fold_field(mib, itemlist[i].entry));
 181 }
 182
 183 static void snmp6_seq_show_item64(struct seq_file *seq, void __percpu **mib,
 184                                   const struct snmp_mib *itemlist, size_t syncpoff)
 185 {
 186         int i;
 187
 188         for (i = 0; itemlist[i].name; i++)
 189                 seq_printf(seq, "%-32s\t%llu\n", itemlist[i].name,
 190                            snmp_fold_field64(mib, itemlist[i].entry, syncpoff));
 191 }
 192
 193 static int snmp6_seq_show(struct seq_file *seq, void *v)
 194 {
 195         struct net *net = (struct net *)seq->private;
 196
 197         snmp6_seq_show_item64(seq, (void __percpu **)net->mib.ipv6_statistics,
 198                             snmp6_ipstats_list, offsetof(struct ipstats_mib, syncp));
 199         snmp6_seq_show_item(seq, (void __percpu **)net->mib.icmpv6_statistics,
 200                             snmp6_icmp6_list);
 201         snmp6_seq_show_icmpv6msg(seq,
 202                             (void __percpu **)net->mib.icmpv6msg_statistics);
 203         snmp6_seq_show_item(seq, (void __percpu **)net->mib.udp_stats_in6,
 204                             snmp6_udp6_list);
 205         snmp6_seq_show_item(seq, (void __percpu **)net->mib.udplite_stats_in6,
 206                             snmp6_udplite6_list);
 207         return 0;
 208 }
 209
 210 static int snmp6_seq_open(struct inode *inode, struct file *file)
 211 {
 212         return single_open_net(inode, file, snmp6_seq_show);
 213 }
 214
 215 static const struct file_operations snmp6_seq_fops = {
 216         .owner   = THIS_MODULE,
 217         .open    = snmp6_seq_open,
 218         .read    = seq_read,
 219         .llseek  = seq_lseek,
 220         .release = single_release_net,
 221 };
 222
 223 static int snmp6_dev_seq_show(struct seq_file *seq, void *v)
 224 {
 225         struct inet6_dev *idev = (struct inet6_dev *)seq->private;
 226
 227         seq_printf(seq, "%-32s\t%u\n", "ifIndex", idev->dev->ifindex);
 228         snmp6_seq_show_item(seq, (void __percpu **)idev->stats.ipv6,
 229                             snmp6_ipstats_list);
 230         snmp6_seq_show_item(seq, (void __percpu **)idev->stats.icmpv6,
 231                             snmp6_icmp6_list);
 232         snmp6_seq_show_icmpv6msg(seq, (void __percpu **)idev->stats.icmpv6msg);
 233         return 0;
 234 }
 235
 236 static int snmp6_dev_seq_open(struct inode *inode, struct file *file)
 237 {
 238         return single_open(file, snmp6_dev_seq_show, PDE(inode)->data);
 239 }
 240
 241 static const struct file_operations snmp6_dev_seq_fops = {
 242         .owner   = THIS_MODULE,
 243         .open    = snmp6_dev_seq_open,
 244         .read    = seq_read,
 245         .llseek  = seq_lseek,
 246         .release = single_release,
 247 };
 248
 249 int snmp6_register_dev(struct inet6_dev *idev)
 250 {
 251         struct proc_dir_entry *p;
 252         struct net *net;
 253
 254         if (!idev || !idev->dev)
 255                 return -EINVAL;
 256
 257         net = dev_net(idev->dev);
 258         if (!net->mib.proc_net_devsnmp6)
 259                 return -ENOENT;
 260
 261         p = proc_create_data(idev->dev->name, S_IRUGO,
 262                              net->mib.proc_net_devsnmp6,
 263                              &snmp6_dev_seq_fops, idev);
 264         if (!p)
 265                 return -ENOMEM;
 266
 267         idev->stats.proc_dir_entry = p;
 268         return 0;
 269 }
 270
 271 int snmp6_unregister_dev(struct inet6_dev *idev)
 272 {
 273         struct net *net = dev_net(idev->dev);
 274         if (!net->mib.proc_net_devsnmp6)
 275                 return -ENOENT;
 276         if (!idev->stats.proc_dir_entry)
 277                 return -EINVAL;
 278         remove_proc_entry(idev->stats.proc_dir_entry->name,
 279                           net->mib.proc_net_devsnmp6);
 280         idev->stats.proc_dir_entry = NULL;
 281         return 0;
 282 }
 283
 284 static int __net_init ipv6_proc_init_net(struct net *net)
 285 {
 286         if (!proc_net_fops_create(net, "sockstat6", S_IRUGO,
 287                         &sockstat6_seq_fops))
 288                 return -ENOMEM;
 289
 290         if (!proc_net_fops_create(net, "snmp6", S_IRUGO, &snmp6_seq_fops))
 291                 goto proc_snmp6_fail;
 292
 293         net->mib.proc_net_devsnmp6 = proc_mkdir("dev_snmp6", net->proc_net);
 294         if (!net->mib.proc_net_devsnmp6)
 295                 goto proc_dev_snmp6_fail;
 296         return 0;
 297
 298 proc_snmp6_fail:
 299         proc_net_remove(net, "sockstat6");
 300 proc_dev_snmp6_fail:
 301         proc_net_remove(net, "dev_snmp6");
 302         return -ENOMEM;
 303 }
 304
 305 static void __net_exit ipv6_proc_exit_net(struct net *net)
 306 {
 307         proc_net_remove(net, "sockstat6");
 308         proc_net_remove(net, "dev_snmp6");
 309         proc_net_remove(net, "snmp6");
 310 }
 311
 312 static struct pernet_operations ipv6_proc_ops = {
 313         .init = ipv6_proc_init_net,
 314         .exit = ipv6_proc_exit_net,
 315 };
 316
 317 int __init ipv6_misc_proc_init(void)
 318 {
 319         return register_pernet_subsys(&ipv6_proc_ops);
 320 }
 321
 322 void ipv6_misc_proc_exit(void)
 323 {
 324         unregister_pernet_subsys(&ipv6_proc_ops);
 325 }
 326