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/sched.h>
  21 #include <linux/socket.h>
  22 #include <linux/net.h>
  23 #include <linux/ipv6.h>
  24 #include <linux/proc_fs.h>
  25 #include <linux/seq_file.h>
  26 #include <linux/stddef.h>
  27 #include <net/sock.h>
  28 #include <net/tcp.h>
  29 #include <net/transp_v6.h>
  30 #include <net/ipv6.h>
  31
  32 #ifdef CONFIG_PROC_FS
  33 static struct proc_dir_entry *proc_net_devsnmp6;
  34
  35 static int fold_prot_inuse(struct proto *proto)
  36 {
  37         int res = 0;
  38         int cpu;
  39
  40         for_each_possible_cpu(cpu)
  41                 res += proto->stats[cpu].inuse;
  42
  43         return res;
  44 }
  45
  46 static int sockstat6_seq_show(struct seq_file *seq, void *v)
  47 {
  48         seq_printf(seq, "TCP6: inuse %d\n",
  49                        fold_prot_inuse(&tcpv6_prot));
  50         seq_printf(seq, "UDP6: inuse %d\n",
  51                        fold_prot_inuse(&udpv6_prot));
  52         seq_printf(seq, "UDPLITE6: inuse %d\n",
  53                         fold_prot_inuse(&udplitev6_prot));
  54         seq_printf(seq, "RAW6: inuse %d\n",
  55                        fold_prot_inuse(&rawv6_prot));
  56         seq_printf(seq, "FRAG6: inuse %d memory %d\n",
  57                        ip6_frag_nqueues, atomic_read(&ip6_frag_mem));
  58         return 0;
  59 }
  60
  61 static struct snmp_mib snmp6_ipstats_list[] = {
  62 /* ipv6 mib according to RFC 2465 */
  63         SNMP_MIB_ITEM("Ip6InReceives", IPSTATS_MIB_INRECEIVES),
  64         SNMP_MIB_ITEM("Ip6InHdrErrors", IPSTATS_MIB_INHDRERRORS),
  65         SNMP_MIB_ITEM("Ip6InTooBigErrors", IPSTATS_MIB_INTOOBIGERRORS),
  66         SNMP_MIB_ITEM("Ip6InNoRoutes", IPSTATS_MIB_INNOROUTES),
  67         SNMP_MIB_ITEM("Ip6InAddrErrors", IPSTATS_MIB_INADDRERRORS),
  68         SNMP_MIB_ITEM("Ip6InUnknownProtos", IPSTATS_MIB_INUNKNOWNPROTOS),
  69         SNMP_MIB_ITEM("Ip6InTruncatedPkts", IPSTATS_MIB_INTRUNCATEDPKTS),
  70         SNMP_MIB_ITEM("Ip6InDiscards", IPSTATS_MIB_INDISCARDS),
  71         SNMP_MIB_ITEM("Ip6InDelivers", IPSTATS_MIB_INDELIVERS),
  72         SNMP_MIB_ITEM("Ip6OutForwDatagrams", IPSTATS_MIB_OUTFORWDATAGRAMS),
  73         SNMP_MIB_ITEM("Ip6OutRequests", IPSTATS_MIB_OUTREQUESTS),
  74         SNMP_MIB_ITEM("Ip6OutDiscards", IPSTATS_MIB_OUTDISCARDS),
  75         SNMP_MIB_ITEM("Ip6OutNoRoutes", IPSTATS_MIB_OUTNOROUTES),
  76         SNMP_MIB_ITEM("Ip6ReasmTimeout", IPSTATS_MIB_REASMTIMEOUT),
  77         SNMP_MIB_ITEM("Ip6ReasmReqds", IPSTATS_MIB_REASMREQDS),
  78         SNMP_MIB_ITEM("Ip6ReasmOKs", IPSTATS_MIB_REASMOKS),
  79         SNMP_MIB_ITEM("Ip6ReasmFails", IPSTATS_MIB_REASMFAILS),
  80         SNMP_MIB_ITEM("Ip6FragOKs", IPSTATS_MIB_FRAGOKS),
  81         SNMP_MIB_ITEM("Ip6FragFails", IPSTATS_MIB_FRAGFAILS),
  82         SNMP_MIB_ITEM("Ip6FragCreates", IPSTATS_MIB_FRAGCREATES),
  83         SNMP_MIB_ITEM("Ip6InMcastPkts", IPSTATS_MIB_INMCASTPKTS),
  84         SNMP_MIB_ITEM("Ip6OutMcastPkts", IPSTATS_MIB_OUTMCASTPKTS),
  85         SNMP_MIB_SENTINEL
  86 };
  87
  88 static struct snmp_mib snmp6_icmp6_list[] = {
  89 /* icmpv6 mib according to RFC 2466
  90
  91    Exceptions:  {In|Out}AdminProhibs are removed, because I see
  92                 no good reasons to account them separately
  93                 of another dest.unreachs.
  94                 OutErrs is zero identically.
  95                 OutEchos too.
  96                 OutRouterAdvertisements too.
  97                 OutGroupMembQueries too.
  98  */
  99         SNMP_MIB_ITEM("Icmp6InMsgs", ICMP6_MIB_INMSGS),
 100         SNMP_MIB_ITEM("Icmp6InErrors", ICMP6_MIB_INERRORS),
 101         SNMP_MIB_ITEM("Icmp6InDestUnreachs", ICMP6_MIB_INDESTUNREACHS),
 102         SNMP_MIB_ITEM("Icmp6InPktTooBigs", ICMP6_MIB_INPKTTOOBIGS),
 103         SNMP_MIB_ITEM("Icmp6InTimeExcds", ICMP6_MIB_INTIMEEXCDS),
 104         SNMP_MIB_ITEM("Icmp6InParmProblems", ICMP6_MIB_INPARMPROBLEMS),
 105         SNMP_MIB_ITEM("Icmp6InEchos", ICMP6_MIB_INECHOS),
 106         SNMP_MIB_ITEM("Icmp6InEchoReplies", ICMP6_MIB_INECHOREPLIES),
 107         SNMP_MIB_ITEM("Icmp6InGroupMembQueries", ICMP6_MIB_INGROUPMEMBQUERIES),
 108         SNMP_MIB_ITEM("Icmp6InGroupMembResponses", ICMP6_MIB_INGROUPMEMBRESPONSES),
 109         SNMP_MIB_ITEM("Icmp6InGroupMembReductions", ICMP6_MIB_INGROUPMEMBREDUCTIONS),
 110         SNMP_MIB_ITEM("Icmp6InRouterSolicits", ICMP6_MIB_INROUTERSOLICITS),
 111         SNMP_MIB_ITEM("Icmp6InRouterAdvertisements", ICMP6_MIB_INROUTERADVERTISEMENTS),
 112         SNMP_MIB_ITEM("Icmp6InNeighborSolicits", ICMP6_MIB_INNEIGHBORSOLICITS),
 113         SNMP_MIB_ITEM("Icmp6InNeighborAdvertisements", ICMP6_MIB_INNEIGHBORADVERTISEMENTS),
 114         SNMP_MIB_ITEM("Icmp6InRedirects", ICMP6_MIB_INREDIRECTS),
 115         SNMP_MIB_ITEM("Icmp6OutMsgs", ICMP6_MIB_OUTMSGS),
 116         SNMP_MIB_ITEM("Icmp6OutDestUnreachs", ICMP6_MIB_OUTDESTUNREACHS),
 117         SNMP_MIB_ITEM("Icmp6OutPktTooBigs", ICMP6_MIB_OUTPKTTOOBIGS),
 118         SNMP_MIB_ITEM("Icmp6OutTimeExcds", ICMP6_MIB_OUTTIMEEXCDS),
 119         SNMP_MIB_ITEM("Icmp6OutParmProblems", ICMP6_MIB_OUTPARMPROBLEMS),
 120         SNMP_MIB_ITEM("Icmp6OutEchoReplies", ICMP6_MIB_OUTECHOREPLIES),
 121         SNMP_MIB_ITEM("Icmp6OutRouterSolicits", ICMP6_MIB_OUTROUTERSOLICITS),
 122         SNMP_MIB_ITEM("Icmp6OutNeighborSolicits", ICMP6_MIB_OUTNEIGHBORSOLICITS),
 123         SNMP_MIB_ITEM("Icmp6OutNeighborAdvertisements", ICMP6_MIB_OUTNEIGHBORADVERTISEMENTS),
 124         SNMP_MIB_ITEM("Icmp6OutRedirects", ICMP6_MIB_OUTREDIRECTS),
 125         SNMP_MIB_ITEM("Icmp6OutGroupMembResponses", ICMP6_MIB_OUTGROUPMEMBRESPONSES),
 126         SNMP_MIB_ITEM("Icmp6OutGroupMembReductions", ICMP6_MIB_OUTGROUPMEMBREDUCTIONS),
 127         SNMP_MIB_SENTINEL
 128 };
 129
 130 static struct snmp_mib snmp6_udp6_list[] = {
 131         SNMP_MIB_ITEM("Udp6InDatagrams", UDP_MIB_INDATAGRAMS),
 132         SNMP_MIB_ITEM("Udp6NoPorts", UDP_MIB_NOPORTS),
 133         SNMP_MIB_ITEM("Udp6InErrors", UDP_MIB_INERRORS),
 134         SNMP_MIB_ITEM("Udp6OutDatagrams", UDP_MIB_OUTDATAGRAMS),
 135         SNMP_MIB_SENTINEL
 136 };
 137
 138 static struct snmp_mib snmp6_udplite6_list[] = {
 139         SNMP_MIB_ITEM("UdpLite6InDatagrams", UDP_MIB_INDATAGRAMS),
 140         SNMP_MIB_ITEM("UdpLite6NoPorts", UDP_MIB_NOPORTS),
 141         SNMP_MIB_ITEM("UdpLite6InErrors", UDP_MIB_INERRORS),
 142         SNMP_MIB_ITEM("UdpLite6OutDatagrams", UDP_MIB_OUTDATAGRAMS),
 143         SNMP_MIB_SENTINEL
 144 };
 145
 146 static unsigned long
 147 fold_field(void *mib[], int offt)
 148 {
 149         unsigned long res = 0;
 150         int i;
 151
 152         for_each_possible_cpu(i) {
 153                 res += *(((unsigned long *)per_cpu_ptr(mib[0], i)) + offt);
 154                 res += *(((unsigned long *)per_cpu_ptr(mib[1], i)) + offt);
 155         }
 156         return res;
 157 }
 158
 159 static inline void
 160 snmp6_seq_show_item(struct seq_file *seq, void **mib, struct snmp_mib *itemlist)
 161 {
 162         int i;
 163         for (i=0; itemlist[i].name; i++)
 164                 seq_printf(seq, "%-32s\t%lu\n", itemlist[i].name,
 165                                 fold_field(mib, itemlist[i].entry));
 166 }
 167
 168 static int snmp6_seq_show(struct seq_file *seq, void *v)
 169 {
 170         struct inet6_dev *idev = (struct inet6_dev *)seq->private;
 171
 172         if (idev) {
 173                 seq_printf(seq, "%-32s\t%u\n", "ifIndex", idev->dev->ifindex);
 174                 snmp6_seq_show_item(seq, (void **)idev->stats.ipv6, snmp6_ipstats_list);
 175                 snmp6_seq_show_item(seq, (void **)idev->stats.icmpv6, snmp6_icmp6_list);
 176         } else {
 177                 snmp6_seq_show_item(seq, (void **)ipv6_statistics, snmp6_ipstats_list);
 178                 snmp6_seq_show_item(seq, (void **)icmpv6_statistics, snmp6_icmp6_list);
 179                 snmp6_seq_show_item(seq, (void **)udp_stats_in6, snmp6_udp6_list);
 180                 snmp6_seq_show_item(seq, (void **)udplite_stats_in6, snmp6_udplite6_list);
 181         }
 182         return 0;
 183 }
 184
 185 static int sockstat6_seq_open(struct inode *inode, struct file *file)
 186 {
 187         return single_open(file, sockstat6_seq_show, NULL);
 188 }
 189
 190 static struct file_operations sockstat6_seq_fops = {
 191         .owner   = THIS_MODULE,
 192         .open    = sockstat6_seq_open,
 193         .read    = seq_read,
 194         .llseek  = seq_lseek,
 195         .release = single_release,
 196 };
 197
 198 static int snmp6_seq_open(struct inode *inode, struct file *file)
 199 {
 200         return single_open(file, snmp6_seq_show, PDE(inode)->data);
 201 }
 202
 203 static struct file_operations snmp6_seq_fops = {
 204         .owner   = THIS_MODULE,
 205         .open    = snmp6_seq_open,
 206         .read    = seq_read,
 207         .llseek  = seq_lseek,
 208         .release = single_release,
 209 };
 210
 211 int snmp6_register_dev(struct inet6_dev *idev)
 212 {
 213         struct proc_dir_entry *p;
 214
 215         if (!idev || !idev->dev)
 216                 return -EINVAL;
 217
 218         if (!proc_net_devsnmp6)
 219                 return -ENOENT;
 220
 221         p = create_proc_entry(idev->dev->name, S_IRUGO, proc_net_devsnmp6);
 222         if (!p)
 223                 return -ENOMEM;
 224
 225         p->data = idev;
 226         p->proc_fops = &snmp6_seq_fops;
 227
 228         idev->stats.proc_dir_entry = p;
 229         return 0;
 230 }
 231
 232 int snmp6_unregister_dev(struct inet6_dev *idev)
 233 {
 234         if (!proc_net_devsnmp6)
 235                 return -ENOENT;
 236         if (!idev || !idev->stats.proc_dir_entry)
 237                 return -EINVAL;
 238         remove_proc_entry(idev->stats.proc_dir_entry->name,
 239                           proc_net_devsnmp6);
 240         return 0;
 241 }
 242
 243 int __init ipv6_misc_proc_init(void)
 244 {
 245         int rc = 0;
 246
 247         if (!proc_net_fops_create("snmp6", S_IRUGO, &snmp6_seq_fops))
 248                 goto proc_snmp6_fail;
 249
 250         proc_net_devsnmp6 = proc_mkdir("dev_snmp6", proc_net);
 251         if (!proc_net_devsnmp6)
 252                 goto proc_dev_snmp6_fail;
 253
 254         if (!proc_net_fops_create("sockstat6", S_IRUGO, &sockstat6_seq_fops))
 255                 goto proc_sockstat6_fail;
 256 out:
 257         return rc;
 258
 259 proc_sockstat6_fail:
 260         proc_net_remove("dev_snmp6");
 261 proc_dev_snmp6_fail:
 262         proc_net_remove("snmp6");
 263 proc_snmp6_fail:
 264         rc = -ENOMEM;
 265         goto out;
 266 }
 267
 268 void ipv6_misc_proc_exit(void)
 269 {
 270         proc_net_remove("sockstat6");
 271         proc_net_remove("dev_snmp6");
 272         proc_net_remove("snmp6");
 273 }
 274
 275 #else   /* CONFIG_PROC_FS */
 276
 277
 278 int snmp6_register_dev(struct inet6_dev *idev)
 279 {
 280         return 0;
 281 }
 282
 283 int snmp6_unregister_dev(struct inet6_dev *idev)
 284 {
 285         return 0;
 286 }
 287 #endif  /* CONFIG_PROC_FS */
 288
 289 int snmp6_alloc_dev(struct inet6_dev *idev)
 290 {
 291         int err = -ENOMEM;
 292
 293         if (!idev || !idev->dev)
 294                 return -EINVAL;
 295
 296         if (snmp6_mib_init((void **)idev->stats.ipv6, sizeof(struct ipstats_mib),
 297                            __alignof__(struct ipstats_mib)) < 0)
 298                 goto err_ip;
 299         if (snmp6_mib_init((void **)idev->stats.icmpv6, sizeof(struct icmpv6_mib),
 300                            __alignof__(struct icmpv6_mib)) < 0)
 301                 goto err_icmp;
 302
 303         return 0;
 304
 305 err_icmp:
 306         snmp6_mib_free((void **)idev->stats.ipv6);
 307 err_ip:
 308         return err;
 309 }
 310
 311 int snmp6_free_dev(struct inet6_dev *idev)
 312 {
 313         snmp6_mib_free((void **)idev->stats.icmpv6);
 314         snmp6_mib_free((void **)idev->stats.ipv6);
 315         return 0;
 316 }
 317
 318