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         unsigned int frag_mem = ip6_frag_mem(net);
  37
  38         seq_printf(seq, "TCP6: inuse %d\n",
  39                        sock_prot_inuse_get(net, &tcpv6_prot));
  40         seq_printf(seq, "UDP6: inuse %d\n",
  41                        sock_prot_inuse_get(net, &udpv6_prot));
  42         seq_printf(seq, "UDPLITE6: inuse %d\n",
  43                         sock_prot_inuse_get(net, &udplitev6_prot));
  44         seq_printf(seq, "RAW6: inuse %d\n",
  45                        sock_prot_inuse_get(net, &rawv6_prot));
  46         seq_printf(seq, "FRAG6: inuse %u memory %u\n", !!frag_mem, frag_mem);
  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         /* IPSTATS_MIB_CSUMERRORS is not relevant in IPv6 (no checksum) */
  94         SNMP_MIB_ITEM("Ip6InNoECTPkts", IPSTATS_MIB_NOECTPKTS),
  95         SNMP_MIB_ITEM("Ip6InECT1Pkts", IPSTATS_MIB_ECT1PKTS),
  96         SNMP_MIB_ITEM("Ip6InECT0Pkts", IPSTATS_MIB_ECT0PKTS),
  97         SNMP_MIB_ITEM("Ip6InCEPkts", IPSTATS_MIB_CEPKTS),
  98         SNMP_MIB_SENTINEL
  99 };
 100
 101 static const struct snmp_mib snmp6_icmp6_list[] = {
 102 /* icmpv6 mib according to RFC 2466 */
 103         SNMP_MIB_ITEM("Icmp6InMsgs", ICMP6_MIB_INMSGS),
 104         SNMP_MIB_ITEM("Icmp6InErrors", ICMP6_MIB_INERRORS),
 105         SNMP_MIB_ITEM("Icmp6OutMsgs", ICMP6_MIB_OUTMSGS),
 106         SNMP_MIB_ITEM("Icmp6OutErrors", ICMP6_MIB_OUTERRORS),
 107         SNMP_MIB_ITEM("Icmp6InCsumErrors", ICMP6_MIB_CSUMERRORS),
 108         SNMP_MIB_SENTINEL
 109 };
 110
 111 /* RFC 4293 v6 ICMPMsgStatsTable; named items for RFC 2466 compatibility */
 112 static const char *const icmp6type2name[256] = {
 113         [ICMPV6_DEST_UNREACH] = "DestUnreachs",
 114         [ICMPV6_PKT_TOOBIG] = "PktTooBigs",
 115         [ICMPV6_TIME_EXCEED] = "TimeExcds",
 116         [ICMPV6_PARAMPROB] = "ParmProblems",
 117         [ICMPV6_ECHO_REQUEST] = "Echos",
 118         [ICMPV6_ECHO_REPLY] = "EchoReplies",
 119         [ICMPV6_MGM_QUERY] = "GroupMembQueries",
 120         [ICMPV6_MGM_REPORT] = "GroupMembResponses",
 121         [ICMPV6_MGM_REDUCTION] = "GroupMembReductions",
 122         [ICMPV6_MLD2_REPORT] = "MLDv2Reports",
 123         [NDISC_ROUTER_ADVERTISEMENT] = "RouterAdvertisements",
 124         [NDISC_ROUTER_SOLICITATION] = "RouterSolicits",
 125         [NDISC_NEIGHBOUR_ADVERTISEMENT] = "NeighborAdvertisements",
 126         [NDISC_NEIGHBOUR_SOLICITATION] = "NeighborSolicits",
 127         [NDISC_REDIRECT] = "Redirects",
 128 };
 129
 130
 131 static const struct snmp_mib snmp6_udp6_list[] = {
 132         SNMP_MIB_ITEM("Udp6InDatagrams", UDP_MIB_INDATAGRAMS),
 133         SNMP_MIB_ITEM("Udp6NoPorts", UDP_MIB_NOPORTS),
 134         SNMP_MIB_ITEM("Udp6InErrors", UDP_MIB_INERRORS),
 135         SNMP_MIB_ITEM("Udp6OutDatagrams", UDP_MIB_OUTDATAGRAMS),
 136         SNMP_MIB_ITEM("Udp6RcvbufErrors", UDP_MIB_RCVBUFERRORS),
 137         SNMP_MIB_ITEM("Udp6SndbufErrors", UDP_MIB_SNDBUFERRORS),
 138         SNMP_MIB_ITEM("Udp6InCsumErrors", UDP_MIB_CSUMERRORS),
 139         SNMP_MIB_ITEM("Udp6IgnoredMulti", UDP_MIB_IGNOREDMULTI),
 140         SNMP_MIB_SENTINEL
 141 };
 142
 143 static const struct snmp_mib snmp6_udplite6_list[] = {
 144         SNMP_MIB_ITEM("UdpLite6InDatagrams", UDP_MIB_INDATAGRAMS),
 145         SNMP_MIB_ITEM("UdpLite6NoPorts", UDP_MIB_NOPORTS),
 146         SNMP_MIB_ITEM("UdpLite6InErrors", UDP_MIB_INERRORS),
 147         SNMP_MIB_ITEM("UdpLite6OutDatagrams", UDP_MIB_OUTDATAGRAMS),
 148         SNMP_MIB_ITEM("UdpLite6RcvbufErrors", UDP_MIB_RCVBUFERRORS),
 149         SNMP_MIB_ITEM("UdpLite6SndbufErrors", UDP_MIB_SNDBUFERRORS),
 150         SNMP_MIB_ITEM("UdpLite6InCsumErrors", UDP_MIB_CSUMERRORS),
 151         SNMP_MIB_SENTINEL
 152 };
 153
 154 static void snmp6_seq_show_icmpv6msg(struct seq_file *seq, atomic_long_t *smib)
 155 {
 156         char name[32];
 157         int i;
 158
 159         /* print by name -- deprecated items */
 160         for (i = 0; i < ICMP6MSG_MIB_MAX; i++) {
 161                 int icmptype;
 162                 const char *p;
 163
 164                 icmptype = i & 0xff;
 165                 p = icmp6type2name[icmptype];
 166                 if (!p) /* don't print un-named types here */
 167                         continue;
 168                 snprintf(name, sizeof(name), "Icmp6%s%s",
 169                         i & 0x100 ? "Out" : "In", p);
 170                 seq_printf(seq, "%-32s\t%lu\n", name,
 171                            atomic_long_read(smib + i));
 172         }
 173
 174         /* print by number (nonzero only) - ICMPMsgStat format */
 175         for (i = 0; i < ICMP6MSG_MIB_MAX; i++) {
 176                 unsigned long val;
 177
 178                 val = atomic_long_read(smib + i);
 179                 if (!val)
 180                         continue;
 181                 snprintf(name, sizeof(name), "Icmp6%sType%u",
 182                         i & 0x100 ?  "Out" : "In", i & 0xff);
 183                 seq_printf(seq, "%-32s\t%lu\n", name, val);
 184         }
 185 }
 186
 187 /* can be called either with percpu mib (pcpumib != NULL),
 188  * or shared one (smib != NULL)
 189  */
 190 static void snmp6_seq_show_item(struct seq_file *seq, void __percpu *pcpumib,
 191                                 atomic_long_t *smib,
 192                                 const struct snmp_mib *itemlist)
 193 {
 194         int i;
 195         unsigned long val;
 196
 197         for (i = 0; itemlist[i].name; i++) {
 198                 val = pcpumib ?
 199                         snmp_fold_field(pcpumib, itemlist[i].entry) :
 200                         atomic_long_read(smib + itemlist[i].entry);
 201                 seq_printf(seq, "%-32s\t%lu\n", itemlist[i].name, val);
 202         }
 203 }
 204
 205 static void snmp6_seq_show_item64(struct seq_file *seq, void __percpu *mib,
 206                                   const struct snmp_mib *itemlist, size_t syncpoff)
 207 {
 208         int i;
 209
 210         for (i = 0; itemlist[i].name; i++)
 211                 seq_printf(seq, "%-32s\t%llu\n", itemlist[i].name,
 212                            snmp_fold_field64(mib, itemlist[i].entry, syncpoff));
 213 }
 214
 215 static int snmp6_seq_show(struct seq_file *seq, void *v)
 216 {
 217         struct net *net = (struct net *)seq->private;
 218
 219         snmp6_seq_show_item64(seq, net->mib.ipv6_statistics,
 220                             snmp6_ipstats_list, offsetof(struct ipstats_mib, syncp));
 221         snmp6_seq_show_item(seq, net->mib.icmpv6_statistics,
 222                             NULL, snmp6_icmp6_list);
 223         snmp6_seq_show_icmpv6msg(seq, net->mib.icmpv6msg_statistics->mibs);
 224         snmp6_seq_show_item(seq, net->mib.udp_stats_in6,
 225                             NULL, snmp6_udp6_list);
 226         snmp6_seq_show_item(seq, net->mib.udplite_stats_in6,
 227                             NULL, snmp6_udplite6_list);
 228         return 0;
 229 }
 230
 231 static int snmp6_seq_open(struct inode *inode, struct file *file)
 232 {
 233         return single_open_net(inode, file, snmp6_seq_show);
 234 }
 235
 236 static const struct file_operations snmp6_seq_fops = {
 237         .owner   = THIS_MODULE,
 238         .open    = snmp6_seq_open,
 239         .read    = seq_read,
 240         .llseek  = seq_lseek,
 241         .release = single_release_net,
 242 };
 243
 244 static int snmp6_dev_seq_show(struct seq_file *seq, void *v)
 245 {
 246         struct inet6_dev *idev = (struct inet6_dev *)seq->private;
 247
 248         seq_printf(seq, "%-32s\t%u\n", "ifIndex", idev->dev->ifindex);
 249         snmp6_seq_show_item64(seq, idev->stats.ipv6,
 250                             snmp6_ipstats_list, offsetof(struct ipstats_mib, syncp));
 251         snmp6_seq_show_item(seq, NULL, idev->stats.icmpv6dev->mibs,
 252                             snmp6_icmp6_list);
 253         snmp6_seq_show_icmpv6msg(seq, idev->stats.icmpv6msgdev->mibs);
 254         return 0;
 255 }
 256
 257 static int snmp6_dev_seq_open(struct inode *inode, struct file *file)
 258 {
 259         return single_open(file, snmp6_dev_seq_show, PDE_DATA(inode));
 260 }
 261
 262 static const struct file_operations snmp6_dev_seq_fops = {
 263         .owner   = THIS_MODULE,
 264         .open    = snmp6_dev_seq_open,
 265         .read    = seq_read,
 266         .llseek  = seq_lseek,
 267         .release = single_release,
 268 };
 269
 270 int snmp6_register_dev(struct inet6_dev *idev)
 271 {
 272         struct proc_dir_entry *p;
 273         struct net *net;
 274
 275         if (!idev || !idev->dev)
 276                 return -EINVAL;
 277
 278         net = dev_net(idev->dev);
 279         if (!net->mib.proc_net_devsnmp6)
 280                 return -ENOENT;
 281
 282         p = proc_create_data(idev->dev->name, S_IRUGO,
 283                              net->mib.proc_net_devsnmp6,
 284                              &snmp6_dev_seq_fops, idev);
 285         if (!p)
 286                 return -ENOMEM;
 287
 288         idev->stats.proc_dir_entry = p;
 289         return 0;
 290 }
 291
 292 int snmp6_unregister_dev(struct inet6_dev *idev)
 293 {
 294         struct net *net = dev_net(idev->dev);
 295         if (!net->mib.proc_net_devsnmp6)
 296                 return -ENOENT;
 297         if (!idev->stats.proc_dir_entry)
 298                 return -EINVAL;
 299         proc_remove(idev->stats.proc_dir_entry);
 300         idev->stats.proc_dir_entry = NULL;
 301         return 0;
 302 }
 303
 304 static int __net_init ipv6_proc_init_net(struct net *net)
 305 {
 306         if (!proc_create("sockstat6", S_IRUGO, net->proc_net,
 307                          &sockstat6_seq_fops))
 308                 return -ENOMEM;
 309
 310         if (!proc_create("snmp6", S_IRUGO, net->proc_net, &snmp6_seq_fops))
 311                 goto proc_snmp6_fail;
 312
 313         net->mib.proc_net_devsnmp6 = proc_mkdir("dev_snmp6", net->proc_net);
 314         if (!net->mib.proc_net_devsnmp6)
 315                 goto proc_dev_snmp6_fail;
 316         return 0;
 317
 318 proc_dev_snmp6_fail:
 319         remove_proc_entry("snmp6", net->proc_net);
 320 proc_snmp6_fail:
 321         remove_proc_entry("sockstat6", net->proc_net);
 322         return -ENOMEM;
 323 }
 324
 325 static void __net_exit ipv6_proc_exit_net(struct net *net)
 326 {
 327         remove_proc_entry("sockstat6", net->proc_net);
 328         remove_proc_entry("dev_snmp6", net->proc_net);
 329         remove_proc_entry("snmp6", net->proc_net);
 330 }
 331
 332 static struct pernet_operations ipv6_proc_ops = {
 333         .init = ipv6_proc_init_net,
 334         .exit = ipv6_proc_exit_net,
 335 };
 336
 337 int __init ipv6_misc_proc_init(void)
 338 {
 339         return register_pernet_subsys(&ipv6_proc_ops);
 340 }
 341
 342 void ipv6_misc_proc_exit(void)
 343 {
 344         unregister_pernet_subsys(&ipv6_proc_ops);
 345 }
 346