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 int sockstat6_seq_show(struct seq_file *seq, void *v)
  33 {
  34         struct net *net = seq->private;
  35
  36         seq_printf(seq, "TCP6: inuse %d\n",
  37                        sock_prot_inuse_get(net, &tcpv6_prot));
  38         seq_printf(seq, "UDP6: inuse %d\n",
  39                        sock_prot_inuse_get(net, &udpv6_prot));
  40         seq_printf(seq, "UDPLITE6: inuse %d\n",
  41                         sock_prot_inuse_get(net, &udplitev6_prot));
  42         seq_printf(seq, "RAW6: inuse %d\n",
  43                        sock_prot_inuse_get(net, &rawv6_prot));
  44         seq_printf(seq, "FRAG6: inuse %d memory %d\n",
  45                        ip6_frag_nqueues(net), ip6_frag_mem(net));
  46         return 0;
  47 }
  48
  49 static int sockstat6_seq_open(struct inode *inode, struct file *file)
  50 {
  51         return single_open_net(inode, file, sockstat6_seq_show);
  52 }
  53
  54 static const struct file_operations sockstat6_seq_fops = {
  55         .owner   = THIS_MODULE,
  56         .open    = sockstat6_seq_open,
  57         .read    = seq_read,
  58         .llseek  = seq_lseek,
  59         .release = single_release_net,
  60 };
  61
  62 static struct snmp_mib snmp6_ipstats_list[] = {
  63 /* ipv6 mib according to RFC 2465 */
  64         SNMP_MIB_ITEM("Ip6InReceives", IPSTATS_MIB_INRECEIVES),
  65         SNMP_MIB_ITEM("Ip6InHdrErrors", IPSTATS_MIB_INHDRERRORS),
  66         SNMP_MIB_ITEM("Ip6InTooBigErrors", IPSTATS_MIB_INTOOBIGERRORS),
  67         SNMP_MIB_ITEM("Ip6InNoRoutes", IPSTATS_MIB_INNOROUTES),
  68         SNMP_MIB_ITEM("Ip6InAddrErrors", IPSTATS_MIB_INADDRERRORS),
  69         SNMP_MIB_ITEM("Ip6InUnknownProtos", IPSTATS_MIB_INUNKNOWNPROTOS),
  70         SNMP_MIB_ITEM("Ip6InTruncatedPkts", IPSTATS_MIB_INTRUNCATEDPKTS),
  71         SNMP_MIB_ITEM("Ip6InDiscards", IPSTATS_MIB_INDISCARDS),
  72         SNMP_MIB_ITEM("Ip6InDelivers", IPSTATS_MIB_INDELIVERS),
  73         SNMP_MIB_ITEM("Ip6OutForwDatagrams", IPSTATS_MIB_OUTFORWDATAGRAMS),
  74         SNMP_MIB_ITEM("Ip6OutRequests", IPSTATS_MIB_OUTREQUESTS),
  75         SNMP_MIB_ITEM("Ip6OutDiscards", IPSTATS_MIB_OUTDISCARDS),
  76         SNMP_MIB_ITEM("Ip6OutNoRoutes", IPSTATS_MIB_OUTNOROUTES),
  77         SNMP_MIB_ITEM("Ip6ReasmTimeout", IPSTATS_MIB_REASMTIMEOUT),
  78         SNMP_MIB_ITEM("Ip6ReasmReqds", IPSTATS_MIB_REASMREQDS),
  79         SNMP_MIB_ITEM("Ip6ReasmOKs", IPSTATS_MIB_REASMOKS),
  80         SNMP_MIB_ITEM("Ip6ReasmFails", IPSTATS_MIB_REASMFAILS),
  81         SNMP_MIB_ITEM("Ip6FragOKs", IPSTATS_MIB_FRAGOKS),
  82         SNMP_MIB_ITEM("Ip6FragFails", IPSTATS_MIB_FRAGFAILS),
  83         SNMP_MIB_ITEM("Ip6FragCreates", IPSTATS_MIB_FRAGCREATES),
  84         SNMP_MIB_ITEM("Ip6InMcastPkts", IPSTATS_MIB_INMCASTPKTS),
  85         SNMP_MIB_ITEM("Ip6OutMcastPkts", IPSTATS_MIB_OUTMCASTPKTS),
  86         SNMP_MIB_SENTINEL
  87 };
  88
  89 static struct snmp_mib snmp6_icmp6_list[] = {
  90 /* icmpv6 mib according to RFC 2466 */
  91         SNMP_MIB_ITEM("Icmp6InMsgs", ICMP6_MIB_INMSGS),
  92         SNMP_MIB_ITEM("Icmp6InErrors", ICMP6_MIB_INERRORS),
  93         SNMP_MIB_ITEM("Icmp6OutMsgs", ICMP6_MIB_OUTMSGS),
  94         SNMP_MIB_SENTINEL
  95 };
  96
  97 /* RFC 4293 v6 ICMPMsgStatsTable; named items for RFC 2466 compatibility */
  98 static char *icmp6type2name[256] = {
  99         [ICMPV6_DEST_UNREACH] = "DestUnreachs",
 100         [ICMPV6_PKT_TOOBIG] = "PktTooBigs",
 101         [ICMPV6_TIME_EXCEED] = "TimeExcds",
 102         [ICMPV6_PARAMPROB] = "ParmProblems",
 103         [ICMPV6_ECHO_REQUEST] = "Echos",
 104         [ICMPV6_ECHO_REPLY] = "EchoReplies",
 105         [ICMPV6_MGM_QUERY] = "GroupMembQueries",
 106         [ICMPV6_MGM_REPORT] = "GroupMembResponses",
 107         [ICMPV6_MGM_REDUCTION] = "GroupMembReductions",
 108         [ICMPV6_MLD2_REPORT] = "MLDv2Reports",
 109         [NDISC_ROUTER_ADVERTISEMENT] = "RouterAdvertisements",
 110         [NDISC_ROUTER_SOLICITATION] = "RouterSolicits",
 111         [NDISC_NEIGHBOUR_ADVERTISEMENT] = "NeighborAdvertisements",
 112         [NDISC_NEIGHBOUR_SOLICITATION] = "NeighborSolicits",
 113         [NDISC_REDIRECT] = "Redirects",
 114 };
 115
 116
 117 static struct snmp_mib snmp6_udp6_list[] = {
 118         SNMP_MIB_ITEM("Udp6InDatagrams", UDP_MIB_INDATAGRAMS),
 119         SNMP_MIB_ITEM("Udp6NoPorts", UDP_MIB_NOPORTS),
 120         SNMP_MIB_ITEM("Udp6InErrors", UDP_MIB_INERRORS),
 121         SNMP_MIB_ITEM("Udp6OutDatagrams", UDP_MIB_OUTDATAGRAMS),
 122         SNMP_MIB_SENTINEL
 123 };
 124
 125 static struct snmp_mib snmp6_udplite6_list[] = {
 126         SNMP_MIB_ITEM("UdpLite6InDatagrams", UDP_MIB_INDATAGRAMS),
 127         SNMP_MIB_ITEM("UdpLite6NoPorts", UDP_MIB_NOPORTS),
 128         SNMP_MIB_ITEM("UdpLite6InErrors", UDP_MIB_INERRORS),
 129         SNMP_MIB_ITEM("UdpLite6OutDatagrams", UDP_MIB_OUTDATAGRAMS),
 130         SNMP_MIB_SENTINEL
 131 };
 132
 133 static void snmp6_seq_show_icmpv6msg(struct seq_file *seq, void **mib)
 134 {
 135         static char name[32];
 136         int i;
 137
 138         /* print by name -- deprecated items */
 139         for (i = 0; i < ICMP6MSG_MIB_MAX; i++) {
 140                 int icmptype;
 141                 char *p;
 142
 143                 icmptype = i & 0xff;
 144                 p = icmp6type2name[icmptype];
 145                 if (!p) /* don't print un-named types here */
 146                         continue;
 147                 (void) snprintf(name, sizeof(name)-1, "Icmp6%s%s",
 148                         i & 0x100 ? "Out" : "In", p);
 149                 seq_printf(seq, "%-32s\t%lu\n", name,
 150                         snmp_fold_field(mib, i));
 151         }
 152
 153         /* print by number (nonzero only) - ICMPMsgStat format */
 154         for (i = 0; i < ICMP6MSG_MIB_MAX; i++) {
 155                 unsigned long val;
 156
 157                 val = snmp_fold_field(mib, i);
 158                 if (!val)
 159                         continue;
 160                 (void) snprintf(name, sizeof(name)-1, "Icmp6%sType%u",
 161                         i & 0x100 ?  "Out" : "In", i & 0xff);
 162                 seq_printf(seq, "%-32s\t%lu\n", name, val);
 163         }
 164         return;
 165 }
 166
 167 static inline void
 168 snmp6_seq_show_item(struct seq_file *seq, void **mib, struct snmp_mib *itemlist)
 169 {
 170         int i;
 171         for (i=0; itemlist[i].name; i++)
 172                 seq_printf(seq, "%-32s\t%lu\n", itemlist[i].name,
 173                            snmp_fold_field(mib, itemlist[i].entry));
 174 }
 175
 176 static int snmp6_seq_show(struct seq_file *seq, void *v)
 177 {
 178         struct net *net = (struct net *)seq->private;
 179
 180         snmp6_seq_show_item(seq, (void **)ipv6_statistics, snmp6_ipstats_list);
 181         snmp6_seq_show_item(seq, (void **)icmpv6_statistics, snmp6_icmp6_list);
 182         snmp6_seq_show_icmpv6msg(seq, (void **)icmpv6msg_statistics);
 183         snmp6_seq_show_item(seq, (void **)udp_stats_in6, snmp6_udp6_list);
 184         snmp6_seq_show_item(seq, (void **)udplite_stats_in6, snmp6_udplite6_list);
 185         return 0;
 186 }
 187
 188 static int snmp6_seq_open(struct inode *inode, struct file *file)
 189 {
 190         return single_open_net(inode, file, snmp6_seq_show);
 191 }
 192
 193 static const struct file_operations snmp6_seq_fops = {
 194         .owner   = THIS_MODULE,
 195         .open    = snmp6_seq_open,
 196         .read    = seq_read,
 197         .llseek  = seq_lseek,
 198         .release = single_release_net,
 199 };
 200
 201 static int snmp6_dev_seq_show(struct seq_file *seq, void *v)
 202 {
 203         struct inet6_dev *idev = (struct inet6_dev *)seq->private;
 204
 205         seq_printf(seq, "%-32s\t%u\n", "ifIndex", idev->dev->ifindex);
 206         snmp6_seq_show_item(seq, (void **)idev->stats.ipv6, snmp6_ipstats_list);
 207         snmp6_seq_show_item(seq, (void **)idev->stats.icmpv6, snmp6_icmp6_list);
 208         snmp6_seq_show_icmpv6msg(seq, (void **)idev->stats.icmpv6msg);
 209         return 0;
 210 }
 211
 212 static int snmp6_dev_seq_open(struct inode *inode, struct file *file)
 213 {
 214         return single_open(file, snmp6_dev_seq_show, PDE(inode)->data);
 215 }
 216
 217 static const struct file_operations snmp6_dev_seq_fops = {
 218         .owner   = THIS_MODULE,
 219         .open    = snmp6_dev_seq_open,
 220         .read    = seq_read,
 221         .llseek  = seq_lseek,
 222         .release = single_release,
 223 };
 224
 225 int snmp6_register_dev(struct inet6_dev *idev)
 226 {
 227         struct proc_dir_entry *p;
 228         struct net *net;
 229
 230         if (!idev || !idev->dev)
 231                 return -EINVAL;
 232
 233         net = dev_net(idev->dev);
 234         if (!net_eq(net, &init_net))
 235                 return 0;
 236
 237         if (!net->mib.proc_net_devsnmp6)
 238                 return -ENOENT;
 239
 240         p = proc_create_data(idev->dev->name, S_IRUGO,
 241                              net->mib.proc_net_devsnmp6,
 242                              &snmp6_dev_seq_fops, idev);
 243         if (!p)
 244                 return -ENOMEM;
 245
 246         idev->stats.proc_dir_entry = p;
 247         return 0;
 248 }
 249
 250 int snmp6_unregister_dev(struct inet6_dev *idev)
 251 {
 252         struct net *net = dev_net(idev->dev);
 253         if (!net->mib.proc_net_devsnmp6)
 254                 return -ENOENT;
 255         if (!idev || !idev->stats.proc_dir_entry)
 256                 return -EINVAL;
 257         remove_proc_entry(idev->stats.proc_dir_entry->name,
 258                           net->mib.proc_net_devsnmp6);
 259         idev->stats.proc_dir_entry = NULL;
 260         return 0;
 261 }
 262
 263 static int ipv6_proc_init_net(struct net *net)
 264 {
 265         if (!proc_net_fops_create(net, "sockstat6", S_IRUGO,
 266                         &sockstat6_seq_fops))
 267                 return -ENOMEM;
 268
 269         if (!proc_net_fops_create(net, "snmp6", S_IRUGO, &snmp6_seq_fops))
 270                 goto proc_snmp6_fail;
 271
 272         net->mib.proc_net_devsnmp6 = proc_mkdir("dev_snmp6", net->proc_net);
 273         if (!net->mib.proc_net_devsnmp6)
 274                 goto proc_dev_snmp6_fail;
 275         return 0;
 276
 277 proc_snmp6_fail:
 278         proc_net_remove(net, "sockstat6");
 279 proc_dev_snmp6_fail:
 280         proc_net_remove(net, "dev_snmp6");
 281         return -ENOMEM;
 282 }
 283
 284 static void ipv6_proc_exit_net(struct net *net)
 285 {
 286         proc_net_remove(net, "sockstat6");
 287         proc_net_remove(net, "dev_snmp6");
 288         proc_net_remove(net, "snmp6");
 289 }
 290
 291 static struct pernet_operations ipv6_proc_ops = {
 292         .init = ipv6_proc_init_net,
 293         .exit = ipv6_proc_exit_net,
 294 };
 295
 296 int __init ipv6_misc_proc_init(void)
 297 {
 298         return register_pernet_subsys(&ipv6_proc_ops);
 299 }
 300
 301 void ipv6_misc_proc_exit(void)
 302 {
 303         unregister_pernet_subsys(&ipv6_proc_ops);
 304 }
 305