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 <linux/export.h>
  25 #include <net/net_namespace.h>
  26 #include <net/ip.h>
  27 #include <net/sock.h>
  28 #include <net/tcp.h>
  29 #include <net/udp.h>
  30 #include <net/transp_v6.h>
  31 #include <net/ipv6.h>
  32
  33 static int sockstat6_seq_show(struct seq_file *seq, void *v)
  34 {
  35         struct net *net = seq->private;
  36
  37         seq_printf(seq, "TCP6: inuse %d\n",
  38                        sock_prot_inuse_get(net, &tcpv6_prot));
  39         seq_printf(seq, "UDP6: inuse %d\n",
  40                        sock_prot_inuse_get(net, &udpv6_prot));
  41         seq_printf(seq, "UDPLITE6: inuse %d\n",
  42                         sock_prot_inuse_get(net, &udplitev6_prot));
  43         seq_printf(seq, "RAW6: inuse %d\n",
  44                        sock_prot_inuse_get(net, &rawv6_prot));
  45         seq_printf(seq, "FRAG6: inuse %d memory %d\n",
  46                        ip6_frag_nqueues(net), ip6_frag_mem(net));
  47         return 0;
  48 }
  49
  50 static int sockstat6_seq_open(struct inode *inode, struct file *file)
  51 {
  52         return single_open_net(inode, file, sockstat6_seq_show);
  53 }
  54
  55 static const struct file_operations sockstat6_seq_fops = {
  56         .owner   = THIS_MODULE,
  57         .open    = sockstat6_seq_open,
  58         .read    = seq_read,
  59         .llseek  = seq_lseek,
  60         .release = single_release_net,
  61 };
  62
  63 static const struct snmp_mib snmp6_ipstats_list[] = {
  64 /* ipv6 mib according to RFC 2465 */
  65         SNMP_MIB_ITEM("Ip6InReceives", IPSTATS_MIB_INPKTS),
  66         SNMP_MIB_ITEM("Ip6InHdrErrors", IPSTATS_MIB_INHDRERRORS),
  67         SNMP_MIB_ITEM("Ip6InTooBigErrors", IPSTATS_MIB_INTOOBIGERRORS),
  68         SNMP_MIB_ITEM("Ip6InNoRoutes", IPSTATS_MIB_INNOROUTES),
  69         SNMP_MIB_ITEM("Ip6InAddrErrors", IPSTATS_MIB_INADDRERRORS),
  70         SNMP_MIB_ITEM("Ip6InUnknownProtos", IPSTATS_MIB_INUNKNOWNPROTOS),
  71         SNMP_MIB_ITEM("Ip6InTruncatedPkts", IPSTATS_MIB_INTRUNCATEDPKTS),
  72         SNMP_MIB_ITEM("Ip6InDiscards", IPSTATS_MIB_INDISCARDS),
  73         SNMP_MIB_ITEM("Ip6InDelivers", IPSTATS_MIB_INDELIVERS),
  74         SNMP_MIB_ITEM("Ip6OutForwDatagrams", IPSTATS_MIB_OUTFORWDATAGRAMS),
  75         SNMP_MIB_ITEM("Ip6OutRequests", IPSTATS_MIB_OUTPKTS),
  76         SNMP_MIB_ITEM("Ip6OutDiscards", IPSTATS_MIB_OUTDISCARDS),
  77         SNMP_MIB_ITEM("Ip6OutNoRoutes", IPSTATS_MIB_OUTNOROUTES),
  78         SNMP_MIB_ITEM("Ip6ReasmTimeout", IPSTATS_MIB_REASMTIMEOUT),
  79         SNMP_MIB_ITEM("Ip6ReasmReqds", IPSTATS_MIB_REASMREQDS),
  80         SNMP_MIB_ITEM("Ip6ReasmOKs", IPSTATS_MIB_REASMOKS),
  81         SNMP_MIB_ITEM("Ip6ReasmFails", IPSTATS_MIB_REASMFAILS),
  82         SNMP_MIB_ITEM("Ip6FragOKs", IPSTATS_MIB_FRAGOKS),
  83         SNMP_MIB_ITEM("Ip6FragFails", IPSTATS_MIB_FRAGFAILS),
  84         SNMP_MIB_ITEM("Ip6FragCreates", IPSTATS_MIB_FRAGCREATES),
  85         SNMP_MIB_ITEM("Ip6InMcastPkts", IPSTATS_MIB_INMCASTPKTS),
  86         SNMP_MIB_ITEM("Ip6OutMcastPkts", IPSTATS_MIB_OUTMCASTPKTS),
  87         SNMP_MIB_ITEM("Ip6InOctets", IPSTATS_MIB_INOCTETS),
  88         SNMP_MIB_ITEM("Ip6OutOctets", IPSTATS_MIB_OUTOCTETS),
  89         SNMP_MIB_ITEM("Ip6InMcastOctets", IPSTATS_MIB_INMCASTOCTETS),
  90         SNMP_MIB_ITEM("Ip6OutMcastOctets", IPSTATS_MIB_OUTMCASTOCTETS),
  91         SNMP_MIB_ITEM("Ip6InBcastOctets", IPSTATS_MIB_INBCASTOCTETS),
  92         SNMP_MIB_ITEM("Ip6OutBcastOctets", IPSTATS_MIB_OUTBCASTOCTETS),
  93         SNMP_MIB_SENTINEL
  94 };
  95
  96 static const struct snmp_mib snmp6_icmp6_list[] = {
  97 /* icmpv6 mib according to RFC 2466 */
  98         SNMP_MIB_ITEM("Icmp6InMsgs", ICMP6_MIB_INMSGS),
  99         SNMP_MIB_ITEM("Icmp6InErrors", ICMP6_MIB_INERRORS),
 100         SNMP_MIB_ITEM("Icmp6OutMsgs", ICMP6_MIB_OUTMSGS),
 101         SNMP_MIB_ITEM("Icmp6OutErrors", ICMP6_MIB_OUTERRORS),
 102         SNMP_MIB_SENTINEL
 103 };
 104
 105 /* RFC 4293 v6 ICMPMsgStatsTable; named items for RFC 2466 compatibility */
 106 static const char *const icmp6type2name[256] = {
 107         [ICMPV6_DEST_UNREACH] = "DestUnreachs",
 108         [ICMPV6_PKT_TOOBIG] = "PktTooBigs",
 109         [ICMPV6_TIME_EXCEED] = "TimeExcds",
 110         [ICMPV6_PARAMPROB] = "ParmProblems",
 111         [ICMPV6_ECHO_REQUEST] = "Echos",
 112         [ICMPV6_ECHO_REPLY] = "EchoReplies",
 113         [ICMPV6_MGM_QUERY] = "GroupMembQueries",
 114         [ICMPV6_MGM_REPORT] = "GroupMembResponses",
 115         [ICMPV6_MGM_REDUCTION] = "GroupMembReductions",
 116         [ICMPV6_MLD2_REPORT] = "MLDv2Reports",
 117         [NDISC_ROUTER_ADVERTISEMENT] = "RouterAdvertisements",
 118         [NDISC_ROUTER_SOLICITATION] = "RouterSolicits",
 119         [NDISC_NEIGHBOUR_ADVERTISEMENT] = "NeighborAdvertisements",
 120         [NDISC_NEIGHBOUR_SOLICITATION] = "NeighborSolicits",
 121         [NDISC_REDIRECT] = "Redirects",
 122 };
 123
 124
 125 static const struct snmp_mib snmp6_udp6_list[] = {
 126         SNMP_MIB_ITEM("Udp6InDatagrams", UDP_MIB_INDATAGRAMS),
 127         SNMP_MIB_ITEM("Udp6NoPorts", UDP_MIB_NOPORTS),
 128         SNMP_MIB_ITEM("Udp6InErrors", UDP_MIB_INERRORS),
 129         SNMP_MIB_ITEM("Udp6OutDatagrams", UDP_MIB_OUTDATAGRAMS),
 130         SNMP_MIB_ITEM("Udp6RcvbufErrors", UDP_MIB_RCVBUFERRORS),
 131         SNMP_MIB_ITEM("Udp6SndbufErrors", UDP_MIB_SNDBUFERRORS),
 132         SNMP_MIB_SENTINEL
 133 };
 134
 135 static const struct snmp_mib snmp6_udplite6_list[] = {
 136         SNMP_MIB_ITEM("UdpLite6InDatagrams", UDP_MIB_INDATAGRAMS),
 137         SNMP_MIB_ITEM("UdpLite6NoPorts", UDP_MIB_NOPORTS),
 138         SNMP_MIB_ITEM("UdpLite6InErrors", UDP_MIB_INERRORS),
 139         SNMP_MIB_ITEM("UdpLite6OutDatagrams", UDP_MIB_OUTDATAGRAMS),
 140         SNMP_MIB_ITEM("UdpLite6RcvbufErrors", UDP_MIB_RCVBUFERRORS),
 141         SNMP_MIB_ITEM("UdpLite6SndbufErrors", UDP_MIB_SNDBUFERRORS),
 142         SNMP_MIB_SENTINEL
 143 };
 144
 145 /* can be called either with percpu mib (pcpumib != NULL),
 146  * or shared one (smib != NULL)
 147  */
 148 static void snmp6_seq_show_icmpv6msg(struct seq_file *seq, void __percpu **pcpumib,
 149                                      atomic_long_t *smib)
 150 {
 151         char name[32];
 152         int i;
 153
 154         /* print by name -- deprecated items */
 155         for (i = 0; i < ICMP6MSG_MIB_MAX; i++) {
 156                 int icmptype;
 157                 const char *p;
 158
 159                 icmptype = i & 0xff;
 160                 p = icmp6type2name[icmptype];
 161                 if (!p) /* don't print un-named types here */
 162                         continue;
 163                 snprintf(name, sizeof(name), "Icmp6%s%s",
 164                         i & 0x100 ? "Out" : "In", p);
 165                 seq_printf(seq, "%-32s\t%lu\n", name,
 166                         pcpumib ? snmp_fold_field(pcpumib, i) : atomic_long_read(smib + i));
 167         }
 168
 169         /* print by number (nonzero only) - ICMPMsgStat format */
 170         for (i = 0; i < ICMP6MSG_MIB_MAX; i++) {
 171                 unsigned long val;
 172
 173                 val = pcpumib ? snmp_fold_field(pcpumib, i) : atomic_long_read(smib + i);
 174                 if (!val)
 175                         continue;
 176                 snprintf(name, sizeof(name), "Icmp6%sType%u",
 177                         i & 0x100 ?  "Out" : "In", i & 0xff);
 178                 seq_printf(seq, "%-32s\t%lu\n", name, val);
 179         }
 180 }
 181
 182 /* can be called either with percpu mib (pcpumib != NULL),
 183  * or shared one (smib != NULL)
 184  */
 185 static void snmp6_seq_show_item(struct seq_file *seq, void __percpu **pcpumib,
 186                                 atomic_long_t *smib,
 187                                 const struct snmp_mib *itemlist)
 188 {
 189         int i;
 190         unsigned long val;
 191
 192         for (i = 0; itemlist[i].name; i++) {
 193                 val = pcpumib ?
 194                         snmp_fold_field(pcpumib, itemlist[i].entry) :
 195                         atomic_long_read(smib + itemlist[i].entry);
 196                 seq_printf(seq, "%-32s\t%lu\n", itemlist[i].name, val);
 197         }
 198 }
 199
 200 static void snmp6_seq_show_item64(struct seq_file *seq, void __percpu **mib,
 201                                   const struct snmp_mib *itemlist, size_t syncpoff)
 202 {
 203         int i;
 204
 205         for (i = 0; itemlist[i].name; i++)
 206                 seq_printf(seq, "%-32s\t%llu\n", itemlist[i].name,
 207                            snmp_fold_field64(mib, itemlist[i].entry, syncpoff));
 208 }
 209
 210 static int snmp6_seq_show(struct seq_file *seq, void *v)
 211 {
 212         struct net *net = (struct net *)seq->private;
 213
 214         snmp6_seq_show_item64(seq, (void __percpu **)net->mib.ipv6_statistics,
 215                             snmp6_ipstats_list, offsetof(struct ipstats_mib, syncp));
 216         snmp6_seq_show_item(seq, (void __percpu **)net->mib.icmpv6_statistics,
 217                             NULL, snmp6_icmp6_list);
 218         snmp6_seq_show_icmpv6msg(seq,
 219                             (void __percpu **)net->mib.icmpv6msg_statistics, NULL);
 220         snmp6_seq_show_item(seq, (void __percpu **)net->mib.udp_stats_in6,
 221                             NULL, snmp6_udp6_list);
 222         snmp6_seq_show_item(seq, (void __percpu **)net->mib.udplite_stats_in6,
 223                             NULL, snmp6_udplite6_list);
 224         return 0;
 225 }
 226
 227 static int snmp6_seq_open(struct inode *inode, struct file *file)
 228 {
 229         return single_open_net(inode, file, snmp6_seq_show);
 230 }
 231
 232 static const struct file_operations snmp6_seq_fops = {
 233         .owner   = THIS_MODULE,
 234         .open    = snmp6_seq_open,
 235         .read    = seq_read,
 236         .llseek  = seq_lseek,
 237         .release = single_release_net,
 238 };
 239
 240 static int snmp6_dev_seq_show(struct seq_file *seq, void *v)
 241 {
 242         struct inet6_dev *idev = (struct inet6_dev *)seq->private;
 243
 244         seq_printf(seq, "%-32s\t%u\n", "ifIndex", idev->dev->ifindex);
 245         snmp6_seq_show_item(seq, (void __percpu **)idev->stats.ipv6, NULL,
 246                             snmp6_ipstats_list);
 247         snmp6_seq_show_item(seq, NULL, idev->stats.icmpv6dev->mibs,
 248                             snmp6_icmp6_list);
 249         snmp6_seq_show_icmpv6msg(seq, NULL, idev->stats.icmpv6msgdev->mibs);
 250         return 0;
 251 }
 252
 253 static int snmp6_dev_seq_open(struct inode *inode, struct file *file)
 254 {
 255         return single_open(file, snmp6_dev_seq_show, PDE(inode)->data);
 256 }
 257
 258 static const struct file_operations snmp6_dev_seq_fops = {
 259         .owner   = THIS_MODULE,
 260         .open    = snmp6_dev_seq_open,
 261         .read    = seq_read,
 262         .llseek  = seq_lseek,
 263         .release = single_release,
 264 };
 265
 266 int snmp6_register_dev(struct inet6_dev *idev)
 267 {
 268         struct proc_dir_entry *p;
 269         struct net *net;
 270
 271         if (!idev || !idev->dev)
 272                 return -EINVAL;
 273
 274         net = dev_net(idev->dev);
 275         if (!net->mib.proc_net_devsnmp6)
 276                 return -ENOENT;
 277
 278         p = proc_create_data(idev->dev->name, S_IRUGO,
 279                              net->mib.proc_net_devsnmp6,
 280                              &snmp6_dev_seq_fops, idev);
 281         if (!p)
 282                 return -ENOMEM;
 283
 284         idev->stats.proc_dir_entry = p;
 285         return 0;
 286 }
 287
 288 int snmp6_unregister_dev(struct inet6_dev *idev)
 289 {
 290         struct net *net = dev_net(idev->dev);
 291         if (!net->mib.proc_net_devsnmp6)
 292                 return -ENOENT;
 293         if (!idev->stats.proc_dir_entry)
 294                 return -EINVAL;
 295         remove_proc_entry(idev->stats.proc_dir_entry->name,
 296                           net->mib.proc_net_devsnmp6);
 297         idev->stats.proc_dir_entry = NULL;
 298         return 0;
 299 }
 300
 301 static int __net_init ipv6_proc_init_net(struct net *net)
 302 {
 303         if (!proc_net_fops_create(net, "sockstat6", S_IRUGO,
 304                         &sockstat6_seq_fops))
 305                 return -ENOMEM;
 306
 307         if (!proc_net_fops_create(net, "snmp6", S_IRUGO, &snmp6_seq_fops))
 308                 goto proc_snmp6_fail;
 309
 310         net->mib.proc_net_devsnmp6 = proc_mkdir("dev_snmp6", net->proc_net);
 311         if (!net->mib.proc_net_devsnmp6)
 312                 goto proc_dev_snmp6_fail;
 313         return 0;
 314
 315 proc_snmp6_fail:
 316         proc_net_remove(net, "sockstat6");
 317 proc_dev_snmp6_fail:
 318         proc_net_remove(net, "dev_snmp6");
 319         return -ENOMEM;
 320 }
 321
 322 static void __net_exit ipv6_proc_exit_net(struct net *net)
 323 {
 324         proc_net_remove(net, "sockstat6");
 325         proc_net_remove(net, "dev_snmp6");
 326         proc_net_remove(net, "snmp6");
 327 }
 328
 329 static struct pernet_operations ipv6_proc_ops = {
 330         .init = ipv6_proc_init_net,
 331         .exit = ipv6_proc_exit_net,
 332 };
 333
 334 int __init ipv6_misc_proc_init(void)
 335 {
 336         return register_pernet_subsys(&ipv6_proc_ops);
 337 }
 338
 339 void ipv6_misc_proc_exit(void)
 340 {
 341         unregister_pernet_subsys(&ipv6_proc_ops);
 342 }
 343