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   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/ip.h>
  27 #include <net/sock.h>
  28 #include <net/tcp.h>
  29 #include <net/transp_v6.h>
  30 #include <net/ipv6.h>
  31
  32 static struct proc_dir_entry *proc_net_devsnmp6;
  33
  34 static int fold_prot_inuse(struct proto *proto)
  35 {
  36         int res = 0;
  37         int cpu;
  38
  39         for_each_possible_cpu(cpu)
  40                 res += proto->stats[cpu].inuse;
  41
  42         return res;
  43 }
  44
  45 static int sockstat6_seq_show(struct seq_file *seq, void *v)
  46 {
  47         seq_printf(seq, "TCP6: inuse %d\n",
  48                        fold_prot_inuse(&tcpv6_prot));
  49         seq_printf(seq, "UDP6: inuse %d\n",
  50                        fold_prot_inuse(&udpv6_prot));
  51         seq_printf(seq, "UDPLITE6: inuse %d\n",
  52                         fold_prot_inuse(&udplitev6_prot));
  53         seq_printf(seq, "RAW6: inuse %d\n",
  54                        fold_prot_inuse(&rawv6_prot));
  55         seq_printf(seq, "FRAG6: inuse %d memory %d\n",
  56                        ip6_frag_nqueues, atomic_read(&ip6_frag_mem));
  57         return 0;
  58 }
  59
  60 static struct snmp_mib snmp6_ipstats_list[] = {
  61 /* ipv6 mib according to RFC 2465 */
  62         SNMP_MIB_ITEM("Ip6InReceives", IPSTATS_MIB_INRECEIVES),
  63         SNMP_MIB_ITEM("Ip6InHdrErrors", IPSTATS_MIB_INHDRERRORS),
  64         SNMP_MIB_ITEM("Ip6InTooBigErrors", IPSTATS_MIB_INTOOBIGERRORS),
  65         SNMP_MIB_ITEM("Ip6InNoRoutes", IPSTATS_MIB_INNOROUTES),
  66         SNMP_MIB_ITEM("Ip6InAddrErrors", IPSTATS_MIB_INADDRERRORS),
  67         SNMP_MIB_ITEM("Ip6InUnknownProtos", IPSTATS_MIB_INUNKNOWNPROTOS),
  68         SNMP_MIB_ITEM("Ip6InTruncatedPkts", IPSTATS_MIB_INTRUNCATEDPKTS),
  69         SNMP_MIB_ITEM("Ip6InDiscards", IPSTATS_MIB_INDISCARDS),
  70         SNMP_MIB_ITEM("Ip6InDelivers", IPSTATS_MIB_INDELIVERS),
  71         SNMP_MIB_ITEM("Ip6OutForwDatagrams", IPSTATS_MIB_OUTFORWDATAGRAMS),
  72         SNMP_MIB_ITEM("Ip6OutRequests", IPSTATS_MIB_OUTREQUESTS),
  73         SNMP_MIB_ITEM("Ip6OutDiscards", IPSTATS_MIB_OUTDISCARDS),
  74         SNMP_MIB_ITEM("Ip6OutNoRoutes", IPSTATS_MIB_OUTNOROUTES),
  75         SNMP_MIB_ITEM("Ip6ReasmTimeout", IPSTATS_MIB_REASMTIMEOUT),
  76         SNMP_MIB_ITEM("Ip6ReasmReqds", IPSTATS_MIB_REASMREQDS),
  77         SNMP_MIB_ITEM("Ip6ReasmOKs", IPSTATS_MIB_REASMOKS),
  78         SNMP_MIB_ITEM("Ip6ReasmFails", IPSTATS_MIB_REASMFAILS),
  79         SNMP_MIB_ITEM("Ip6FragOKs", IPSTATS_MIB_FRAGOKS),
  80         SNMP_MIB_ITEM("Ip6FragFails", IPSTATS_MIB_FRAGFAILS),
  81         SNMP_MIB_ITEM("Ip6FragCreates", IPSTATS_MIB_FRAGCREATES),
  82         SNMP_MIB_ITEM("Ip6InMcastPkts", IPSTATS_MIB_INMCASTPKTS),
  83         SNMP_MIB_ITEM("Ip6OutMcastPkts", IPSTATS_MIB_OUTMCASTPKTS),
  84         SNMP_MIB_SENTINEL
  85 };
  86
  87 static struct snmp_mib snmp6_icmp6_list[] = {
  88 /* icmpv6 mib according to RFC 2466
  89
  90    Exceptions:  {In|Out}AdminProhibs are removed, because I see
  91                 no good reasons to account them separately
  92                 of another dest.unreachs.
  93                 OutErrs is zero identically.
  94                 OutEchos too.
  95                 OutRouterAdvertisements too.
  96                 OutGroupMembQueries too.
  97  */
  98         SNMP_MIB_ITEM("Icmp6InMsgs", ICMP6_MIB_INMSGS),
  99         SNMP_MIB_ITEM("Icmp6InErrors", ICMP6_MIB_INERRORS),
 100         SNMP_MIB_ITEM("Icmp6InDestUnreachs", ICMP6_MIB_INDESTUNREACHS),
 101         SNMP_MIB_ITEM("Icmp6InPktTooBigs", ICMP6_MIB_INPKTTOOBIGS),
 102         SNMP_MIB_ITEM("Icmp6InTimeExcds", ICMP6_MIB_INTIMEEXCDS),
 103         SNMP_MIB_ITEM("Icmp6InParmProblems", ICMP6_MIB_INPARMPROBLEMS),
 104         SNMP_MIB_ITEM("Icmp6InEchos", ICMP6_MIB_INECHOS),
 105         SNMP_MIB_ITEM("Icmp6InEchoReplies", ICMP6_MIB_INECHOREPLIES),
 106         SNMP_MIB_ITEM("Icmp6InGroupMembQueries", ICMP6_MIB_INGROUPMEMBQUERIES),
 107         SNMP_MIB_ITEM("Icmp6InGroupMembResponses", ICMP6_MIB_INGROUPMEMBRESPONSES),
 108         SNMP_MIB_ITEM("Icmp6InGroupMembReductions", ICMP6_MIB_INGROUPMEMBREDUCTIONS),
 109         SNMP_MIB_ITEM("Icmp6InRouterSolicits", ICMP6_MIB_INROUTERSOLICITS),
 110         SNMP_MIB_ITEM("Icmp6InRouterAdvertisements", ICMP6_MIB_INROUTERADVERTISEMENTS),
 111         SNMP_MIB_ITEM("Icmp6InNeighborSolicits", ICMP6_MIB_INNEIGHBORSOLICITS),
 112         SNMP_MIB_ITEM("Icmp6InNeighborAdvertisements", ICMP6_MIB_INNEIGHBORADVERTISEMENTS),
 113         SNMP_MIB_ITEM("Icmp6InRedirects", ICMP6_MIB_INREDIRECTS),
 114         SNMP_MIB_ITEM("Icmp6OutMsgs", ICMP6_MIB_OUTMSGS),
 115         SNMP_MIB_ITEM("Icmp6OutDestUnreachs", ICMP6_MIB_OUTDESTUNREACHS),
 116         SNMP_MIB_ITEM("Icmp6OutPktTooBigs", ICMP6_MIB_OUTPKTTOOBIGS),
 117         SNMP_MIB_ITEM("Icmp6OutTimeExcds", ICMP6_MIB_OUTTIMEEXCDS),
 118         SNMP_MIB_ITEM("Icmp6OutParmProblems", ICMP6_MIB_OUTPARMPROBLEMS),
 119         SNMP_MIB_ITEM("Icmp6OutEchoReplies", ICMP6_MIB_OUTECHOREPLIES),
 120         SNMP_MIB_ITEM("Icmp6OutRouterSolicits", ICMP6_MIB_OUTROUTERSOLICITS),
 121         SNMP_MIB_ITEM("Icmp6OutNeighborSolicits", ICMP6_MIB_OUTNEIGHBORSOLICITS),
 122         SNMP_MIB_ITEM("Icmp6OutNeighborAdvertisements", ICMP6_MIB_OUTNEIGHBORADVERTISEMENTS),
 123         SNMP_MIB_ITEM("Icmp6OutRedirects", ICMP6_MIB_OUTREDIRECTS),
 124         SNMP_MIB_ITEM("Icmp6OutGroupMembResponses", ICMP6_MIB_OUTGROUPMEMBRESPONSES),
 125         SNMP_MIB_ITEM("Icmp6OutGroupMembReductions", ICMP6_MIB_OUTGROUPMEMBREDUCTIONS),
 126         SNMP_MIB_SENTINEL
 127 };
 128
 129 static struct snmp_mib snmp6_udp6_list[] = {
 130         SNMP_MIB_ITEM("Udp6InDatagrams", UDP_MIB_INDATAGRAMS),
 131         SNMP_MIB_ITEM("Udp6NoPorts", UDP_MIB_NOPORTS),
 132         SNMP_MIB_ITEM("Udp6InErrors", UDP_MIB_INERRORS),
 133         SNMP_MIB_ITEM("Udp6OutDatagrams", UDP_MIB_OUTDATAGRAMS),
 134         SNMP_MIB_SENTINEL
 135 };
 136
 137 static struct snmp_mib snmp6_udplite6_list[] = {
 138         SNMP_MIB_ITEM("UdpLite6InDatagrams", UDP_MIB_INDATAGRAMS),
 139         SNMP_MIB_ITEM("UdpLite6NoPorts", UDP_MIB_NOPORTS),
 140         SNMP_MIB_ITEM("UdpLite6InErrors", UDP_MIB_INERRORS),
 141         SNMP_MIB_ITEM("UdpLite6OutDatagrams", UDP_MIB_OUTDATAGRAMS),
 142         SNMP_MIB_SENTINEL
 143 };
 144
 145 static inline void
 146 snmp6_seq_show_item(struct seq_file *seq, void **mib, struct snmp_mib *itemlist)
 147 {
 148         int i;
 149         for (i=0; itemlist[i].name; i++)
 150                 seq_printf(seq, "%-32s\t%lu\n", itemlist[i].name,
 151                            snmp_fold_field(mib, itemlist[i].entry));
 152 }
 153
 154 static int snmp6_seq_show(struct seq_file *seq, void *v)
 155 {
 156         struct inet6_dev *idev = (struct inet6_dev *)seq->private;
 157
 158         if (idev) {
 159                 seq_printf(seq, "%-32s\t%u\n", "ifIndex", idev->dev->ifindex);
 160                 snmp6_seq_show_item(seq, (void **)idev->stats.ipv6, snmp6_ipstats_list);
 161                 snmp6_seq_show_item(seq, (void **)idev->stats.icmpv6, snmp6_icmp6_list);
 162         } else {
 163                 snmp6_seq_show_item(seq, (void **)ipv6_statistics, snmp6_ipstats_list);
 164                 snmp6_seq_show_item(seq, (void **)icmpv6_statistics, snmp6_icmp6_list);
 165                 snmp6_seq_show_item(seq, (void **)udp_stats_in6, snmp6_udp6_list);
 166                 snmp6_seq_show_item(seq, (void **)udplite_stats_in6, snmp6_udplite6_list);
 167         }
 168         return 0;
 169 }
 170
 171 static int sockstat6_seq_open(struct inode *inode, struct file *file)
 172 {
 173         return single_open(file, sockstat6_seq_show, NULL);
 174 }
 175
 176 static const struct file_operations sockstat6_seq_fops = {
 177         .owner   = THIS_MODULE,
 178         .open    = sockstat6_seq_open,
 179         .read    = seq_read,
 180         .llseek  = seq_lseek,
 181         .release = single_release,
 182 };
 183
 184 static int snmp6_seq_open(struct inode *inode, struct file *file)
 185 {
 186         return single_open(file, snmp6_seq_show, PDE(inode)->data);
 187 }
 188
 189 static const struct file_operations snmp6_seq_fops = {
 190         .owner   = THIS_MODULE,
 191         .open    = snmp6_seq_open,
 192         .read    = seq_read,
 193         .llseek  = seq_lseek,
 194         .release = single_release,
 195 };
 196
 197 int snmp6_register_dev(struct inet6_dev *idev)
 198 {
 199         struct proc_dir_entry *p;
 200
 201         if (!idev || !idev->dev)
 202                 return -EINVAL;
 203
 204         if (!proc_net_devsnmp6)
 205                 return -ENOENT;
 206
 207         p = create_proc_entry(idev->dev->name, S_IRUGO, proc_net_devsnmp6);
 208         if (!p)
 209                 return -ENOMEM;
 210
 211         p->data = idev;
 212         p->proc_fops = &snmp6_seq_fops;
 213
 214         idev->stats.proc_dir_entry = p;
 215         return 0;
 216 }
 217
 218 int snmp6_unregister_dev(struct inet6_dev *idev)
 219 {
 220         if (!proc_net_devsnmp6)
 221                 return -ENOENT;
 222         if (!idev || !idev->stats.proc_dir_entry)
 223                 return -EINVAL;
 224         remove_proc_entry(idev->stats.proc_dir_entry->name,
 225                           proc_net_devsnmp6);
 226         idev->stats.proc_dir_entry = NULL;
 227         return 0;
 228 }
 229
 230 int __init ipv6_misc_proc_init(void)
 231 {
 232         int rc = 0;
 233
 234         if (!proc_net_fops_create("snmp6", S_IRUGO, &snmp6_seq_fops))
 235                 goto proc_snmp6_fail;
 236
 237         proc_net_devsnmp6 = proc_mkdir("dev_snmp6", proc_net);
 238         if (!proc_net_devsnmp6)
 239                 goto proc_dev_snmp6_fail;
 240
 241         if (!proc_net_fops_create("sockstat6", S_IRUGO, &sockstat6_seq_fops))
 242                 goto proc_sockstat6_fail;
 243 out:
 244         return rc;
 245
 246 proc_sockstat6_fail:
 247         proc_net_remove("dev_snmp6");
 248 proc_dev_snmp6_fail:
 249         proc_net_remove("snmp6");
 250 proc_snmp6_fail:
 251         rc = -ENOMEM;
 252         goto out;
 253 }
 254
 255 void ipv6_misc_proc_exit(void)
 256 {
 257         proc_net_remove("sockstat6");
 258         proc_net_remove("dev_snmp6");
 259         proc_net_remove("snmp6");
 260 }
 261