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  * Authors:     David S. Miller (davem@caip.rutgers.edu)
  11  *              YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org>
  12  *
  13  *              This program is free software; you can redistribute it and/or
  14  *              modify it under the terms of the GNU General Public License
  15  *              as published by the Free Software Foundation; either version
  16  *              2 of the License, or (at your option) any later version.
  17  */
  18 #include <linux/socket.h>
  19 #include <linux/net.h>
  20 #include <linux/ipv6.h>
  21 #include <linux/proc_fs.h>
  22 #include <linux/seq_file.h>
  23 #include <linux/stddef.h>
  24 #include <net/net_namespace.h>
  25 #include <net/ip.h>
  26 #include <net/sock.h>
  27 #include <net/tcp.h>
  28 #include <net/udp.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 sockstat6_seq_show(struct seq_file *seq, void *v)
  35 {
  36         struct net *net = seq->private;
  37
  38         seq_printf(seq, "TCP6: inuse %d\n",
  39                        sock_prot_inuse_get(net, &tcpv6_prot));
  40         seq_printf(seq, "UDP6: inuse %d\n",
  41                        sock_prot_inuse_get(net, &udpv6_prot));
  42         seq_printf(seq, "UDPLITE6: inuse %d\n",
  43                         sock_prot_inuse_get(net, &udplitev6_prot));
  44         seq_printf(seq, "RAW6: inuse %d\n",
  45                        sock_prot_inuse_get(net, &rawv6_prot));
  46         seq_printf(seq, "FRAG6: inuse %d memory %d\n",
  47                        ip6_frag_nqueues(net), ip6_frag_mem(net));
  48         return 0;
  49 }
  50
  51 static struct snmp_mib snmp6_ipstats_list[] = {
  52 /* ipv6 mib according to RFC 2465 */
  53         SNMP_MIB_ITEM("Ip6InReceives", IPSTATS_MIB_INRECEIVES),
  54         SNMP_MIB_ITEM("Ip6InHdrErrors", IPSTATS_MIB_INHDRERRORS),
  55         SNMP_MIB_ITEM("Ip6InTooBigErrors", IPSTATS_MIB_INTOOBIGERRORS),
  56         SNMP_MIB_ITEM("Ip6InNoRoutes", IPSTATS_MIB_INNOROUTES),
  57         SNMP_MIB_ITEM("Ip6InAddrErrors", IPSTATS_MIB_INADDRERRORS),
  58         SNMP_MIB_ITEM("Ip6InUnknownProtos", IPSTATS_MIB_INUNKNOWNPROTOS),
  59         SNMP_MIB_ITEM("Ip6InTruncatedPkts", IPSTATS_MIB_INTRUNCATEDPKTS),
  60         SNMP_MIB_ITEM("Ip6InDiscards", IPSTATS_MIB_INDISCARDS),
  61         SNMP_MIB_ITEM("Ip6InDelivers", IPSTATS_MIB_INDELIVERS),
  62         SNMP_MIB_ITEM("Ip6OutForwDatagrams", IPSTATS_MIB_OUTFORWDATAGRAMS),
  63         SNMP_MIB_ITEM("Ip6OutRequests", IPSTATS_MIB_OUTREQUESTS),
  64         SNMP_MIB_ITEM("Ip6OutDiscards", IPSTATS_MIB_OUTDISCARDS),
  65         SNMP_MIB_ITEM("Ip6OutNoRoutes", IPSTATS_MIB_OUTNOROUTES),
  66         SNMP_MIB_ITEM("Ip6ReasmTimeout", IPSTATS_MIB_REASMTIMEOUT),
  67         SNMP_MIB_ITEM("Ip6ReasmReqds", IPSTATS_MIB_REASMREQDS),
  68         SNMP_MIB_ITEM("Ip6ReasmOKs", IPSTATS_MIB_REASMOKS),
  69         SNMP_MIB_ITEM("Ip6ReasmFails", IPSTATS_MIB_REASMFAILS),
  70         SNMP_MIB_ITEM("Ip6FragOKs", IPSTATS_MIB_FRAGOKS),
  71         SNMP_MIB_ITEM("Ip6FragFails", IPSTATS_MIB_FRAGFAILS),
  72         SNMP_MIB_ITEM("Ip6FragCreates", IPSTATS_MIB_FRAGCREATES),
  73         SNMP_MIB_ITEM("Ip6InMcastPkts", IPSTATS_MIB_INMCASTPKTS),
  74         SNMP_MIB_ITEM("Ip6OutMcastPkts", IPSTATS_MIB_OUTMCASTPKTS),
  75         SNMP_MIB_SENTINEL
  76 };
  77
  78 static struct snmp_mib snmp6_icmp6_list[] = {
  79 /* icmpv6 mib according to RFC 2466 */
  80         SNMP_MIB_ITEM("Icmp6InMsgs", ICMP6_MIB_INMSGS),
  81         SNMP_MIB_ITEM("Icmp6InErrors", ICMP6_MIB_INERRORS),
  82         SNMP_MIB_ITEM("Icmp6OutMsgs", ICMP6_MIB_OUTMSGS),
  83         SNMP_MIB_SENTINEL
  84 };
  85
  86 /* RFC 4293 v6 ICMPMsgStatsTable; named items for RFC 2466 compatibility */
  87 static char *icmp6type2name[256] = {
  88         [ICMPV6_DEST_UNREACH] = "DestUnreachs",
  89         [ICMPV6_PKT_TOOBIG] = "PktTooBigs",
  90         [ICMPV6_TIME_EXCEED] = "TimeExcds",
  91         [ICMPV6_PARAMPROB] = "ParmProblems",
  92         [ICMPV6_ECHO_REQUEST] = "Echos",
  93         [ICMPV6_ECHO_REPLY] = "EchoReplies",
  94         [ICMPV6_MGM_QUERY] = "GroupMembQueries",
  95         [ICMPV6_MGM_REPORT] = "GroupMembResponses",
  96         [ICMPV6_MGM_REDUCTION] = "GroupMembReductions",
  97         [ICMPV6_MLD2_REPORT] = "MLDv2Reports",
  98         [NDISC_ROUTER_ADVERTISEMENT] = "RouterAdvertisements",
  99         [NDISC_ROUTER_SOLICITATION] = "RouterSolicits",
 100         [NDISC_NEIGHBOUR_ADVERTISEMENT] = "NeighborAdvertisements",
 101         [NDISC_NEIGHBOUR_SOLICITATION] = "NeighborSolicits",
 102         [NDISC_REDIRECT] = "Redirects",
 103 };
 104
 105
 106 static struct snmp_mib snmp6_udp6_list[] = {
 107         SNMP_MIB_ITEM("Udp6InDatagrams", UDP_MIB_INDATAGRAMS),
 108         SNMP_MIB_ITEM("Udp6NoPorts", UDP_MIB_NOPORTS),
 109         SNMP_MIB_ITEM("Udp6InErrors", UDP_MIB_INERRORS),
 110         SNMP_MIB_ITEM("Udp6OutDatagrams", UDP_MIB_OUTDATAGRAMS),
 111         SNMP_MIB_SENTINEL
 112 };
 113
 114 static struct snmp_mib snmp6_udplite6_list[] = {
 115         SNMP_MIB_ITEM("UdpLite6InDatagrams", UDP_MIB_INDATAGRAMS),
 116         SNMP_MIB_ITEM("UdpLite6NoPorts", UDP_MIB_NOPORTS),
 117         SNMP_MIB_ITEM("UdpLite6InErrors", UDP_MIB_INERRORS),
 118         SNMP_MIB_ITEM("UdpLite6OutDatagrams", UDP_MIB_OUTDATAGRAMS),
 119         SNMP_MIB_SENTINEL
 120 };
 121
 122 static void snmp6_seq_show_icmpv6msg(struct seq_file *seq, void **mib)
 123 {
 124         static char name[32];
 125         int i;
 126
 127         /* print by name -- deprecated items */
 128         for (i = 0; i < ICMP6MSG_MIB_MAX; i++) {
 129                 int icmptype;
 130                 char *p;
 131
 132                 icmptype = i & 0xff;
 133                 p = icmp6type2name[icmptype];
 134                 if (!p) /* don't print un-named types here */
 135                         continue;
 136                 (void) snprintf(name, sizeof(name)-1, "Icmp6%s%s",
 137                         i & 0x100 ? "Out" : "In", p);
 138                 seq_printf(seq, "%-32s\t%lu\n", name,
 139                         snmp_fold_field(mib, i));
 140         }
 141
 142         /* print by number (nonzero only) - ICMPMsgStat format */
 143         for (i = 0; i < ICMP6MSG_MIB_MAX; i++) {
 144                 unsigned long val;
 145
 146                 val = snmp_fold_field(mib, i);
 147                 if (!val)
 148                         continue;
 149                 (void) snprintf(name, sizeof(name)-1, "Icmp6%sType%u",
 150                         i & 0x100 ?  "Out" : "In", i & 0xff);
 151                 seq_printf(seq, "%-32s\t%lu\n", name, val);
 152         }
 153         return;
 154 }
 155
 156 static inline void
 157 snmp6_seq_show_item(struct seq_file *seq, void **mib, struct snmp_mib *itemlist)
 158 {
 159         int i;
 160         for (i=0; itemlist[i].name; i++)
 161                 seq_printf(seq, "%-32s\t%lu\n", itemlist[i].name,
 162                            snmp_fold_field(mib, itemlist[i].entry));
 163 }
 164
 165 static int snmp6_seq_show(struct seq_file *seq, void *v)
 166 {
 167         struct inet6_dev *idev = (struct inet6_dev *)seq->private;
 168
 169         if (idev) {
 170                 seq_printf(seq, "%-32s\t%u\n", "ifIndex", idev->dev->ifindex);
 171                 snmp6_seq_show_item(seq, (void **)idev->stats.ipv6, snmp6_ipstats_list);
 172                 snmp6_seq_show_item(seq, (void **)idev->stats.icmpv6, snmp6_icmp6_list);
 173                 snmp6_seq_show_icmpv6msg(seq, (void **)idev->stats.icmpv6msg);
 174         } else {
 175                 snmp6_seq_show_item(seq, (void **)ipv6_statistics, snmp6_ipstats_list);
 176                 snmp6_seq_show_item(seq, (void **)icmpv6_statistics, snmp6_icmp6_list);
 177                 snmp6_seq_show_icmpv6msg(seq, (void **)icmpv6msg_statistics);
 178                 snmp6_seq_show_item(seq, (void **)udp_stats_in6, snmp6_udp6_list);
 179                 snmp6_seq_show_item(seq, (void **)udplite_stats_in6, snmp6_udplite6_list);
 180         }
 181         return 0;
 182 }
 183
 184 static int sockstat6_seq_open(struct inode *inode, struct file *file)
 185 {
 186         return single_open_net(inode, file, sockstat6_seq_show);
 187 }
 188
 189 static const struct file_operations sockstat6_seq_fops = {
 190         .owner   = THIS_MODULE,
 191         .open    = sockstat6_seq_open,
 192         .read    = seq_read,
 193         .llseek  = seq_lseek,
 194         .release = single_release_net,
 195 };
 196
 197 static int snmp6_seq_open(struct inode *inode, struct file *file)
 198 {
 199         return single_open(file, snmp6_seq_show, PDE(inode)->data);
 200 }
 201
 202 static const struct file_operations snmp6_seq_fops = {
 203         .owner   = THIS_MODULE,
 204         .open    = snmp6_seq_open,
 205         .read    = seq_read,
 206         .llseek  = seq_lseek,
 207         .release = single_release,
 208 };
 209
 210 int snmp6_register_dev(struct inet6_dev *idev)
 211 {
 212         struct proc_dir_entry *p;
 213
 214         if (!idev || !idev->dev)
 215                 return -EINVAL;
 216
 217         if (!net_eq(dev_net(idev->dev), &init_net))
 218                 return 0;
 219
 220         if (!proc_net_devsnmp6)
 221                 return -ENOENT;
 222
 223         p = proc_create_data(idev->dev->name, S_IRUGO,
 224                              proc_net_devsnmp6, &snmp6_seq_fops, idev);
 225         if (!p)
 226                 return -ENOMEM;
 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         idev->stats.proc_dir_entry = NULL;
 241         return 0;
 242 }
 243
 244 static int ipv6_proc_init_net(struct net *net)
 245 {
 246         if (!proc_net_fops_create(net, "sockstat6", S_IRUGO,
 247                         &sockstat6_seq_fops))
 248                 return -ENOMEM;
 249         return 0;
 250 }
 251
 252 static void ipv6_proc_exit_net(struct net *net)
 253 {
 254         proc_net_remove(net, "sockstat6");
 255 }
 256
 257 static struct pernet_operations ipv6_proc_ops = {
 258         .init = ipv6_proc_init_net,
 259         .exit = ipv6_proc_exit_net,
 260 };
 261
 262 int __init ipv6_misc_proc_init(void)
 263 {
 264         int rc = 0;
 265
 266         if (register_pernet_subsys(&ipv6_proc_ops))
 267                 goto proc_net_fail;
 268
 269         if (!proc_net_fops_create(&init_net, "snmp6", S_IRUGO, &snmp6_seq_fops))
 270                 goto proc_snmp6_fail;
 271
 272         proc_net_devsnmp6 = proc_mkdir("dev_snmp6", init_net.proc_net);
 273         if (!proc_net_devsnmp6)
 274                 goto proc_dev_snmp6_fail;
 275 out:
 276         return rc;
 277
 278 proc_dev_snmp6_fail:
 279         proc_net_remove(&init_net, "snmp6");
 280 proc_snmp6_fail:
 281         unregister_pernet_subsys(&ipv6_proc_ops);
 282 proc_net_fail:
 283         rc = -ENOMEM;
 284         goto out;
 285 }
 286
 287 void ipv6_misc_proc_exit(void)
 288 {
 289         proc_net_remove(&init_net, "dev_snmp6");
 290         proc_net_remove(&init_net, "snmp6");
 291         unregister_pernet_subsys(&ipv6_proc_ops);
 292 }
 293