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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/config.h>
  21 #include <linux/sched.h>
  22 #include <linux/socket.h>
  23 #include <linux/net.h>
  24 #include <linux/ipv6.h>
  25 #include <linux/proc_fs.h>
  26 #include <linux/seq_file.h>
  27 #include <linux/stddef.h>
  28 #include <net/sock.h>
  29 #include <net/tcp.h>
  30 #include <net/transp_v6.h>
  31 #include <net/ipv6.h>
  32
  33 #ifdef CONFIG_PROC_FS
  34 static struct proc_dir_entry *proc_net_devsnmp6;
  35
  36 static int fold_prot_inuse(struct proto *proto)
  37 {
  38         int res = 0;
  39         int cpu;
  40
  41         for_each_possible_cpu(cpu)
  42                 res += proto->stats[cpu].inuse;
  43
  44         return res;
  45 }
  46
  47 static int sockstat6_seq_show(struct seq_file *seq, void *v)
  48 {
  49         seq_printf(seq, "TCP6: inuse %d\n",
  50                        fold_prot_inuse(&tcpv6_prot));
  51         seq_printf(seq, "UDP6: inuse %d\n",
  52                        fold_prot_inuse(&udpv6_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 unsigned long
 138 fold_field(void *mib[], int offt)
 139 {
 140         unsigned long res = 0;
 141         int i;
 142
 143         for_each_possible_cpu(i) {
 144                 res += *(((unsigned long *)per_cpu_ptr(mib[0], i)) + offt);
 145                 res += *(((unsigned long *)per_cpu_ptr(mib[1], i)) + offt);
 146         }
 147         return res;
 148 }
 149
 150 static inline void
 151 snmp6_seq_show_item(struct seq_file *seq, void **mib, struct snmp_mib *itemlist)
 152 {
 153         int i;
 154         for (i=0; itemlist[i].name; i++)
 155                 seq_printf(seq, "%-32s\t%lu\n", itemlist[i].name,
 156                                 fold_field(mib, itemlist[i].entry));
 157 }
 158
 159 static int snmp6_seq_show(struct seq_file *seq, void *v)
 160 {
 161         struct inet6_dev *idev = (struct inet6_dev *)seq->private;
 162
 163         if (idev) {
 164                 seq_printf(seq, "%-32s\t%u\n", "ifIndex", idev->dev->ifindex);
 165                 snmp6_seq_show_item(seq, (void **)idev->stats.icmpv6, snmp6_icmp6_list);
 166         } else {
 167                 snmp6_seq_show_item(seq, (void **)ipv6_statistics, snmp6_ipstats_list);
 168                 snmp6_seq_show_item(seq, (void **)icmpv6_statistics, snmp6_icmp6_list);
 169                 snmp6_seq_show_item(seq, (void **)udp_stats_in6, snmp6_udp6_list);
 170         }
 171         return 0;
 172 }
 173
 174 static int sockstat6_seq_open(struct inode *inode, struct file *file)
 175 {
 176         return single_open(file, sockstat6_seq_show, NULL);
 177 }
 178
 179 static struct file_operations sockstat6_seq_fops = {
 180         .owner   = THIS_MODULE,
 181         .open    = sockstat6_seq_open,
 182         .read    = seq_read,
 183         .llseek  = seq_lseek,
 184         .release = single_release,
 185 };
 186
 187 static int snmp6_seq_open(struct inode *inode, struct file *file)
 188 {
 189         return single_open(file, snmp6_seq_show, PDE(inode)->data);
 190 }
 191
 192 static struct file_operations snmp6_seq_fops = {
 193         .owner   = THIS_MODULE,
 194         .open    = snmp6_seq_open,
 195         .read    = seq_read,
 196         .llseek  = seq_lseek,
 197         .release = single_release,
 198 };
 199
 200 int snmp6_register_dev(struct inet6_dev *idev)
 201 {
 202         struct proc_dir_entry *p;
 203
 204         if (!idev || !idev->dev)
 205                 return -EINVAL;
 206
 207         if (!proc_net_devsnmp6)
 208                 return -ENOENT;
 209
 210         p = create_proc_entry(idev->dev->name, S_IRUGO, proc_net_devsnmp6);
 211         if (!p)
 212                 return -ENOMEM;
 213
 214         p->data = idev;
 215         p->proc_fops = &snmp6_seq_fops;
 216
 217         idev->stats.proc_dir_entry = p;
 218         return 0;
 219 }
 220
 221 int snmp6_unregister_dev(struct inet6_dev *idev)
 222 {
 223         if (!proc_net_devsnmp6)
 224                 return -ENOENT;
 225         if (!idev || !idev->stats.proc_dir_entry)
 226                 return -EINVAL;
 227         remove_proc_entry(idev->stats.proc_dir_entry->name,
 228                           proc_net_devsnmp6);
 229         return 0;
 230 }
 231
 232 int __init ipv6_misc_proc_init(void)
 233 {
 234         int rc = 0;
 235
 236         if (!proc_net_fops_create("snmp6", S_IRUGO, &snmp6_seq_fops))
 237                 goto proc_snmp6_fail;
 238
 239         proc_net_devsnmp6 = proc_mkdir("dev_snmp6", proc_net);
 240         if (!proc_net_devsnmp6)
 241                 goto proc_dev_snmp6_fail;
 242
 243         if (!proc_net_fops_create("sockstat6", S_IRUGO, &sockstat6_seq_fops))
 244                 goto proc_sockstat6_fail;
 245 out:
 246         return rc;
 247
 248 proc_sockstat6_fail:
 249         proc_net_remove("dev_snmp6");
 250 proc_dev_snmp6_fail:
 251         proc_net_remove("snmp6");
 252 proc_snmp6_fail:
 253         rc = -ENOMEM;
 254         goto out;
 255 }
 256
 257 void ipv6_misc_proc_exit(void)
 258 {
 259         proc_net_remove("sockstat6");
 260         proc_net_remove("dev_snmp6");
 261         proc_net_remove("snmp6");
 262 }
 263
 264 #else   /* CONFIG_PROC_FS */
 265
 266
 267 int snmp6_register_dev(struct inet6_dev *idev)
 268 {
 269         return 0;
 270 }
 271
 272 int snmp6_unregister_dev(struct inet6_dev *idev)
 273 {
 274         return 0;
 275 }
 276 #endif  /* CONFIG_PROC_FS */
 277
 278 int snmp6_alloc_dev(struct inet6_dev *idev)
 279 {
 280         int err = -ENOMEM;
 281
 282         if (!idev || !idev->dev)
 283                 return -EINVAL;
 284
 285         if (snmp6_mib_init((void **)idev->stats.icmpv6, sizeof(struct icmpv6_mib),
 286                            __alignof__(struct icmpv6_mib)) < 0)
 287                 goto err_icmp;
 288
 289         return 0;
 290
 291 err_icmp:
 292         return err;
 293 }
 294
 295 int snmp6_free_dev(struct inet6_dev *idev)
 296 {
 297         snmp6_mib_free((void **)idev->stats.icmpv6);
 298         return 0;
 299 }
 300
 301