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 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(), 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         SNMP_MIB_ITEM("Icmp6InMsgs", ICMP6_MIB_INMSGS),
  91         SNMP_MIB_ITEM("Icmp6InErrors", ICMP6_MIB_INERRORS),
  92         SNMP_MIB_ITEM("Icmp6OutMsgs", ICMP6_MIB_OUTMSGS),
  93         SNMP_MIB_SENTINEL
  94 };
  95
  96 /* RFC 4293 v6 ICMPMsgStatsTable; named items for RFC 2466 compatibility */
  97 static char *icmp6type2name[256] = {
  98         [ICMPV6_DEST_UNREACH] = "DestUnreachs",
  99         [ICMPV6_PKT_TOOBIG] = "PktTooBigs",
 100         [ICMPV6_TIME_EXCEED] = "TimeExcds",
 101         [ICMPV6_PARAMPROB] = "ParmProblems",
 102         [ICMPV6_ECHO_REQUEST] = "EchoRequest",
 103         [ICMPV6_ECHO_REPLY] = "EchoReplies",
 104         [ICMPV6_MGM_QUERY] = "GroupMembQueries",
 105         [ICMPV6_MGM_REPORT] = "GroupMembResponses",
 106         [ICMPV6_MGM_REDUCTION] = "GroupMembReductions",
 107         [ICMPV6_MLD2_REPORT] = "MLDv2Reports",
 108         [NDISC_ROUTER_ADVERTISEMENT] = "RouterAdvertisements",
 109         [NDISC_ROUTER_SOLICITATION] = "RouterSolicits",
 110         [NDISC_NEIGHBOUR_ADVERTISEMENT] = "NeighborAdvertisements",
 111         [NDISC_NEIGHBOUR_SOLICITATION] = "NeighborSolicits",
 112         [NDISC_REDIRECT] = "NeighborRedirects",
 113 };
 114
 115
 116 static struct snmp_mib snmp6_udp6_list[] = {
 117         SNMP_MIB_ITEM("Udp6InDatagrams", UDP_MIB_INDATAGRAMS),
 118         SNMP_MIB_ITEM("Udp6NoPorts", UDP_MIB_NOPORTS),
 119         SNMP_MIB_ITEM("Udp6InErrors", UDP_MIB_INERRORS),
 120         SNMP_MIB_ITEM("Udp6OutDatagrams", UDP_MIB_OUTDATAGRAMS),
 121         SNMP_MIB_SENTINEL
 122 };
 123
 124 static struct snmp_mib snmp6_udplite6_list[] = {
 125         SNMP_MIB_ITEM("UdpLite6InDatagrams", UDP_MIB_INDATAGRAMS),
 126         SNMP_MIB_ITEM("UdpLite6NoPorts", UDP_MIB_NOPORTS),
 127         SNMP_MIB_ITEM("UdpLite6InErrors", UDP_MIB_INERRORS),
 128         SNMP_MIB_ITEM("UdpLite6OutDatagrams", UDP_MIB_OUTDATAGRAMS),
 129         SNMP_MIB_SENTINEL
 130 };
 131
 132 static void snmp6_seq_show_icmpv6msg(struct seq_file *seq, void **mib)
 133 {
 134         static char name[32];
 135         int i;
 136
 137         /* print by name -- deprecated items */
 138         for (i = 0; i < ICMP6MSG_MIB_MAX; i++) {
 139                 int icmptype;
 140                 char *p;
 141
 142                 icmptype = i & 0xff;
 143                 p = icmp6type2name[icmptype];
 144                 if (!p) /* don't print un-named types here */
 145                         continue;
 146                 (void) snprintf(name, sizeof(name)-1, "Icmp6%s%s",
 147                         i & 0x100 ? "Out" : "In", p);
 148                 seq_printf(seq, "%-32s\t%lu\n", name,
 149                         snmp_fold_field(mib, i));
 150         }
 151
 152         /* print by number (nonzero only) - ICMPMsgStat format */
 153         for (i = 0; i < ICMP6MSG_MIB_MAX; i++) {
 154                 unsigned long val;
 155
 156                 val = snmp_fold_field(mib, i);
 157                 if (!val)
 158                         continue;
 159                 (void) snprintf(name, sizeof(name)-1, "Icmp6%sType%u",
 160                         i & 0x100 ?  "Out" : "In", i & 0xff);
 161                 seq_printf(seq, "%-32s\t%lu\n", name, val);
 162         }
 163         return;
 164 }
 165
 166 static inline void
 167 snmp6_seq_show_item(struct seq_file *seq, void **mib, struct snmp_mib *itemlist)
 168 {
 169         int i;
 170         for (i=0; itemlist[i].name; i++)
 171                 seq_printf(seq, "%-32s\t%lu\n", itemlist[i].name,
 172                            snmp_fold_field(mib, itemlist[i].entry));
 173 }
 174
 175 static int snmp6_seq_show(struct seq_file *seq, void *v)
 176 {
 177         struct inet6_dev *idev = (struct inet6_dev *)seq->private;
 178
 179         if (idev) {
 180                 seq_printf(seq, "%-32s\t%u\n", "ifIndex", idev->dev->ifindex);
 181                 snmp6_seq_show_item(seq, (void **)idev->stats.ipv6, snmp6_ipstats_list);
 182                 snmp6_seq_show_item(seq, (void **)idev->stats.icmpv6, snmp6_icmp6_list);
 183                 snmp6_seq_show_icmpv6msg(seq, (void **)idev->stats.icmpv6msg);
 184         } else {
 185                 snmp6_seq_show_item(seq, (void **)ipv6_statistics, snmp6_ipstats_list);
 186                 snmp6_seq_show_item(seq, (void **)icmpv6_statistics, snmp6_icmp6_list);
 187                 snmp6_seq_show_icmpv6msg(seq, (void **)icmpv6msg_statistics);
 188                 snmp6_seq_show_item(seq, (void **)udp_stats_in6, snmp6_udp6_list);
 189                 snmp6_seq_show_item(seq, (void **)udplite_stats_in6, snmp6_udplite6_list);
 190         }
 191         return 0;
 192 }
 193
 194 static int sockstat6_seq_open(struct inode *inode, struct file *file)
 195 {
 196         return single_open(file, sockstat6_seq_show, NULL);
 197 }
 198
 199 static const struct file_operations sockstat6_seq_fops = {
 200         .owner   = THIS_MODULE,
 201         .open    = sockstat6_seq_open,
 202         .read    = seq_read,
 203         .llseek  = seq_lseek,
 204         .release = single_release,
 205 };
 206
 207 static int snmp6_seq_open(struct inode *inode, struct file *file)
 208 {
 209         return single_open(file, snmp6_seq_show, PDE(inode)->data);
 210 }
 211
 212 static const struct file_operations snmp6_seq_fops = {
 213         .owner   = THIS_MODULE,
 214         .open    = snmp6_seq_open,
 215         .read    = seq_read,
 216         .llseek  = seq_lseek,
 217         .release = single_release,
 218 };
 219
 220 int snmp6_register_dev(struct inet6_dev *idev)
 221 {
 222         struct proc_dir_entry *p;
 223
 224         if (!idev || !idev->dev)
 225                 return -EINVAL;
 226
 227         if (!proc_net_devsnmp6)
 228                 return -ENOENT;
 229
 230         p = create_proc_entry(idev->dev->name, S_IRUGO, proc_net_devsnmp6);
 231         if (!p)
 232                 return -ENOMEM;
 233
 234         p->data = idev;
 235         p->proc_fops = &snmp6_seq_fops;
 236
 237         idev->stats.proc_dir_entry = p;
 238         return 0;
 239 }
 240
 241 int snmp6_unregister_dev(struct inet6_dev *idev)
 242 {
 243         if (!proc_net_devsnmp6)
 244                 return -ENOENT;
 245         if (!idev || !idev->stats.proc_dir_entry)
 246                 return -EINVAL;
 247         remove_proc_entry(idev->stats.proc_dir_entry->name,
 248                           proc_net_devsnmp6);
 249         idev->stats.proc_dir_entry = NULL;
 250         return 0;
 251 }
 252
 253 int __init ipv6_misc_proc_init(void)
 254 {
 255         int rc = 0;
 256
 257         if (!proc_net_fops_create(&init_net, "snmp6", S_IRUGO, &snmp6_seq_fops))
 258                 goto proc_snmp6_fail;
 259
 260         proc_net_devsnmp6 = proc_mkdir("dev_snmp6", init_net.proc_net);
 261         if (!proc_net_devsnmp6)
 262                 goto proc_dev_snmp6_fail;
 263
 264         if (!proc_net_fops_create(&init_net, "sockstat6", S_IRUGO, &sockstat6_seq_fops))
 265                 goto proc_sockstat6_fail;
 266 out:
 267         return rc;
 268
 269 proc_sockstat6_fail:
 270         proc_net_remove(&init_net, "dev_snmp6");
 271 proc_dev_snmp6_fail:
 272         proc_net_remove(&init_net, "snmp6");
 273 proc_snmp6_fail:
 274         rc = -ENOMEM;
 275         goto out;
 276 }
 277
 278 void ipv6_misc_proc_exit(void)
 279 {
 280         proc_net_remove(&init_net, "sockstat6");
 281         proc_net_remove(&init_net, "dev_snmp6");
 282         proc_net_remove(&init_net, "snmp6");
 283 }
 284