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  * Version:     $Id: proc.c,v 1.17 2002/02/01 22:01:04 davem Exp $
  11  *
  12  * Authors:     David S. Miller (davem@caip.rutgers.edu)
  13  *              YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org>
  14  *
  15  *              This program is free software; you can redistribute it and/or
  16  *              modify it under the terms of the GNU General Public License
  17  *              as published by the Free Software Foundation; either version
  18  *              2 of the License, or (at your option) any later version.
  19  */
  20 #include <linux/socket.h>
  21 #include <linux/net.h>
  22 #include <linux/ipv6.h>
  23 #include <linux/proc_fs.h>
  24 #include <linux/seq_file.h>
  25 #include <linux/stddef.h>
  26 #include <net/net_namespace.h>
  27 #include <net/ip.h>
  28 #include <net/sock.h>
  29 #include <net/tcp.h>
  30 #include <net/transp_v6.h>
  31 #include <net/ipv6.h>
  32
  33 static struct proc_dir_entry *proc_net_devsnmp6;
  34
  35 static int sockstat6_seq_show(struct seq_file *seq, void *v)
  36 {
  37         seq_printf(seq, "TCP6: inuse %d\n",
  38                        sock_prot_inuse(&tcpv6_prot));
  39         seq_printf(seq, "UDP6: inuse %d\n",
  40                        sock_prot_inuse(&udpv6_prot));
  41         seq_printf(seq, "UDPLITE6: inuse %d\n",
  42                         sock_prot_inuse(&udplitev6_prot));
  43         seq_printf(seq, "RAW6: inuse %d\n",
  44                        sock_prot_inuse(&rawv6_prot));
  45         seq_printf(seq, "FRAG6: inuse %d memory %d\n",
  46                        ip6_frag_nqueues(), ip6_frag_mem());
  47         return 0;
  48 }
  49
  50 static struct snmp_mib snmp6_ipstats_list[] = {
  51 /* ipv6 mib according to RFC 2465 */
  52         SNMP_MIB_ITEM("Ip6InReceives", IPSTATS_MIB_INRECEIVES),
  53         SNMP_MIB_ITEM("Ip6InHdrErrors", IPSTATS_MIB_INHDRERRORS),
  54         SNMP_MIB_ITEM("Ip6InTooBigErrors", IPSTATS_MIB_INTOOBIGERRORS),
  55         SNMP_MIB_ITEM("Ip6InNoRoutes", IPSTATS_MIB_INNOROUTES),
  56         SNMP_MIB_ITEM("Ip6InAddrErrors", IPSTATS_MIB_INADDRERRORS),
  57         SNMP_MIB_ITEM("Ip6InUnknownProtos", IPSTATS_MIB_INUNKNOWNPROTOS),
  58         SNMP_MIB_ITEM("Ip6InTruncatedPkts", IPSTATS_MIB_INTRUNCATEDPKTS),
  59         SNMP_MIB_ITEM("Ip6InDiscards", IPSTATS_MIB_INDISCARDS),
  60         SNMP_MIB_ITEM("Ip6InDelivers", IPSTATS_MIB_INDELIVERS),
  61         SNMP_MIB_ITEM("Ip6OutForwDatagrams", IPSTATS_MIB_OUTFORWDATAGRAMS),
  62         SNMP_MIB_ITEM("Ip6OutRequests", IPSTATS_MIB_OUTREQUESTS),
  63         SNMP_MIB_ITEM("Ip6OutDiscards", IPSTATS_MIB_OUTDISCARDS),
  64         SNMP_MIB_ITEM("Ip6OutNoRoutes", IPSTATS_MIB_OUTNOROUTES),
  65         SNMP_MIB_ITEM("Ip6ReasmTimeout", IPSTATS_MIB_REASMTIMEOUT),
  66         SNMP_MIB_ITEM("Ip6ReasmReqds", IPSTATS_MIB_REASMREQDS),
  67         SNMP_MIB_ITEM("Ip6ReasmOKs", IPSTATS_MIB_REASMOKS),
  68         SNMP_MIB_ITEM("Ip6ReasmFails", IPSTATS_MIB_REASMFAILS),
  69         SNMP_MIB_ITEM("Ip6FragOKs", IPSTATS_MIB_FRAGOKS),
  70         SNMP_MIB_ITEM("Ip6FragFails", IPSTATS_MIB_FRAGFAILS),
  71         SNMP_MIB_ITEM("Ip6FragCreates", IPSTATS_MIB_FRAGCREATES),
  72         SNMP_MIB_ITEM("Ip6InMcastPkts", IPSTATS_MIB_INMCASTPKTS),
  73         SNMP_MIB_ITEM("Ip6OutMcastPkts", IPSTATS_MIB_OUTMCASTPKTS),
  74         SNMP_MIB_SENTINEL
  75 };
  76
  77 static struct snmp_mib snmp6_icmp6_list[] = {
  78 /* icmpv6 mib according to RFC 2466 */
  79         SNMP_MIB_ITEM("Icmp6InMsgs", ICMP6_MIB_INMSGS),
  80         SNMP_MIB_ITEM("Icmp6InErrors", ICMP6_MIB_INERRORS),
  81         SNMP_MIB_ITEM("Icmp6OutMsgs", ICMP6_MIB_OUTMSGS),
  82         SNMP_MIB_SENTINEL
  83 };
  84
  85 /* RFC 4293 v6 ICMPMsgStatsTable; named items for RFC 2466 compatibility */
  86 static char *icmp6type2name[256] = {
  87         [ICMPV6_DEST_UNREACH] = "DestUnreachs",
  88         [ICMPV6_PKT_TOOBIG] = "PktTooBigs",
  89         [ICMPV6_TIME_EXCEED] = "TimeExcds",
  90         [ICMPV6_PARAMPROB] = "ParmProblems",
  91         [ICMPV6_ECHO_REQUEST] = "Echos",
  92         [ICMPV6_ECHO_REPLY] = "EchoReplies",
  93         [ICMPV6_MGM_QUERY] = "GroupMembQueries",
  94         [ICMPV6_MGM_REPORT] = "GroupMembResponses",
  95         [ICMPV6_MGM_REDUCTION] = "GroupMembReductions",
  96         [ICMPV6_MLD2_REPORT] = "MLDv2Reports",
  97         [NDISC_ROUTER_ADVERTISEMENT] = "RouterAdvertisements",
  98         [NDISC_ROUTER_SOLICITATION] = "RouterSolicits",
  99         [NDISC_NEIGHBOUR_ADVERTISEMENT] = "NeighborAdvertisements",
 100         [NDISC_NEIGHBOUR_SOLICITATION] = "NeighborSolicits",
 101         [NDISC_REDIRECT] = "Redirects",
 102 };
 103
 104
 105 static struct snmp_mib snmp6_udp6_list[] = {
 106         SNMP_MIB_ITEM("Udp6InDatagrams", UDP_MIB_INDATAGRAMS),
 107         SNMP_MIB_ITEM("Udp6NoPorts", UDP_MIB_NOPORTS),
 108         SNMP_MIB_ITEM("Udp6InErrors", UDP_MIB_INERRORS),
 109         SNMP_MIB_ITEM("Udp6OutDatagrams", UDP_MIB_OUTDATAGRAMS),
 110         SNMP_MIB_SENTINEL
 111 };
 112
 113 static struct snmp_mib snmp6_udplite6_list[] = {
 114         SNMP_MIB_ITEM("UdpLite6InDatagrams", UDP_MIB_INDATAGRAMS),
 115         SNMP_MIB_ITEM("UdpLite6NoPorts", UDP_MIB_NOPORTS),
 116         SNMP_MIB_ITEM("UdpLite6InErrors", UDP_MIB_INERRORS),
 117         SNMP_MIB_ITEM("UdpLite6OutDatagrams", UDP_MIB_OUTDATAGRAMS),
 118         SNMP_MIB_SENTINEL
 119 };
 120
 121 static void snmp6_seq_show_icmpv6msg(struct seq_file *seq, void **mib)
 122 {
 123         static char name[32];
 124         int i;
 125
 126         /* print by name -- deprecated items */
 127         for (i = 0; i < ICMP6MSG_MIB_MAX; i++) {
 128                 int icmptype;
 129                 char *p;
 130
 131                 icmptype = i & 0xff;
 132                 p = icmp6type2name[icmptype];
 133                 if (!p) /* don't print un-named types here */
 134                         continue;
 135                 (void) snprintf(name, sizeof(name)-1, "Icmp6%s%s",
 136                         i & 0x100 ? "Out" : "In", p);
 137                 seq_printf(seq, "%-32s\t%lu\n", name,
 138                         snmp_fold_field(mib, i));
 139         }
 140
 141         /* print by number (nonzero only) - ICMPMsgStat format */
 142         for (i = 0; i < ICMP6MSG_MIB_MAX; i++) {
 143                 unsigned long val;
 144
 145                 val = snmp_fold_field(mib, i);
 146                 if (!val)
 147                         continue;
 148                 (void) snprintf(name, sizeof(name)-1, "Icmp6%sType%u",
 149                         i & 0x100 ?  "Out" : "In", i & 0xff);
 150                 seq_printf(seq, "%-32s\t%lu\n", name, val);
 151         }
 152         return;
 153 }
 154
 155 static inline void
 156 snmp6_seq_show_item(struct seq_file *seq, void **mib, struct snmp_mib *itemlist)
 157 {
 158         int i;
 159         for (i=0; itemlist[i].name; i++)
 160                 seq_printf(seq, "%-32s\t%lu\n", itemlist[i].name,
 161                            snmp_fold_field(mib, itemlist[i].entry));
 162 }
 163
 164 static int snmp6_seq_show(struct seq_file *seq, void *v)
 165 {
 166         struct inet6_dev *idev = (struct inet6_dev *)seq->private;
 167
 168         if (idev) {
 169                 seq_printf(seq, "%-32s\t%u\n", "ifIndex", idev->dev->ifindex);
 170                 snmp6_seq_show_item(seq, (void **)idev->stats.ipv6, snmp6_ipstats_list);
 171                 snmp6_seq_show_item(seq, (void **)idev->stats.icmpv6, snmp6_icmp6_list);
 172                 snmp6_seq_show_icmpv6msg(seq, (void **)idev->stats.icmpv6msg);
 173         } else {
 174                 snmp6_seq_show_item(seq, (void **)ipv6_statistics, snmp6_ipstats_list);
 175                 snmp6_seq_show_item(seq, (void **)icmpv6_statistics, snmp6_icmp6_list);
 176                 snmp6_seq_show_icmpv6msg(seq, (void **)icmpv6msg_statistics);
 177                 snmp6_seq_show_item(seq, (void **)udp_stats_in6, snmp6_udp6_list);
 178                 snmp6_seq_show_item(seq, (void **)udplite_stats_in6, snmp6_udplite6_list);
 179         }
 180         return 0;
 181 }
 182
 183 static int sockstat6_seq_open(struct inode *inode, struct file *file)
 184 {
 185         return single_open(file, sockstat6_seq_show, NULL);
 186 }
 187
 188 static const struct file_operations sockstat6_seq_fops = {
 189         .owner   = THIS_MODULE,
 190         .open    = sockstat6_seq_open,
 191         .read    = seq_read,
 192         .llseek  = seq_lseek,
 193         .release = single_release,
 194 };
 195
 196 static int snmp6_seq_open(struct inode *inode, struct file *file)
 197 {
 198         return single_open(file, snmp6_seq_show, PDE(inode)->data);
 199 }
 200
 201 static const struct file_operations snmp6_seq_fops = {
 202         .owner   = THIS_MODULE,
 203         .open    = snmp6_seq_open,
 204         .read    = seq_read,
 205         .llseek  = seq_lseek,
 206         .release = single_release,
 207 };
 208
 209 int snmp6_register_dev(struct inet6_dev *idev)
 210 {
 211         struct proc_dir_entry *p;
 212
 213         if (!idev || !idev->dev)
 214                 return -EINVAL;
 215
 216         if (!proc_net_devsnmp6)
 217                 return -ENOENT;
 218
 219         p = create_proc_entry(idev->dev->name, S_IRUGO, proc_net_devsnmp6);
 220         if (!p)
 221                 return -ENOMEM;
 222
 223         p->data = idev;
 224         p->proc_fops = &snmp6_seq_fops;
 225
 226         idev->stats.proc_dir_entry = p;
 227         return 0;
 228 }
 229
 230 int snmp6_unregister_dev(struct inet6_dev *idev)
 231 {
 232         if (!proc_net_devsnmp6)
 233                 return -ENOENT;
 234         if (!idev || !idev->stats.proc_dir_entry)
 235                 return -EINVAL;
 236         remove_proc_entry(idev->stats.proc_dir_entry->name,
 237                           proc_net_devsnmp6);
 238         idev->stats.proc_dir_entry = NULL;
 239         return 0;
 240 }
 241
 242 int __init ipv6_misc_proc_init(void)
 243 {
 244         int rc = 0;
 245
 246         if (!proc_net_fops_create(&init_net, "snmp6", S_IRUGO, &snmp6_seq_fops))
 247                 goto proc_snmp6_fail;
 248
 249         proc_net_devsnmp6 = proc_mkdir("dev_snmp6", init_net.proc_net);
 250         if (!proc_net_devsnmp6)
 251                 goto proc_dev_snmp6_fail;
 252
 253         if (!proc_net_fops_create(&init_net, "sockstat6", S_IRUGO, &sockstat6_seq_fops))
 254                 goto proc_sockstat6_fail;
 255 out:
 256         return rc;
 257
 258 proc_sockstat6_fail:
 259         proc_net_remove(&init_net, "dev_snmp6");
 260 proc_dev_snmp6_fail:
 261         proc_net_remove(&init_net, "snmp6");
 262 proc_snmp6_fail:
 263         rc = -ENOMEM;
 264         goto out;
 265 }
 266
 267 void ipv6_misc_proc_exit(void)
 268 {
 269         proc_net_remove(&init_net, "sockstat6");
 270         proc_net_remove(&init_net, "dev_snmp6");
 271         proc_net_remove(&init_net, "snmp6");
 272 }
 273