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 const struct snmp_mib snmp6_ipstats_list[] = {
  63 /* ipv6 mib according to RFC 2465 */
  64         SNMP_MIB_ITEM("Ip6InReceives", IPSTATS_MIB_INPKTS),
  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_OUTPKTS),
  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_ITEM("Ip6InOctets", IPSTATS_MIB_INOCTETS),
  87         SNMP_MIB_ITEM("Ip6OutOctets", IPSTATS_MIB_OUTOCTETS),
  88         SNMP_MIB_ITEM("Ip6InMcastOctets", IPSTATS_MIB_INMCASTOCTETS),
  89         SNMP_MIB_ITEM("Ip6OutMcastOctets", IPSTATS_MIB_OUTMCASTOCTETS),
  90         SNMP_MIB_ITEM("Ip6InBcastOctets", IPSTATS_MIB_INBCASTOCTETS),
  91         SNMP_MIB_ITEM("Ip6OutBcastOctets", IPSTATS_MIB_OUTBCASTOCTETS),
  92         SNMP_MIB_SENTINEL
  93 };
  94
  95 static const struct snmp_mib snmp6_icmp6_list[] = {
  96 /* icmpv6 mib according to RFC 2466 */
  97         SNMP_MIB_ITEM("Icmp6InMsgs", ICMP6_MIB_INMSGS),
  98         SNMP_MIB_ITEM("Icmp6InErrors", ICMP6_MIB_INERRORS),
  99         SNMP_MIB_ITEM("Icmp6OutMsgs", ICMP6_MIB_OUTMSGS),
 100         SNMP_MIB_ITEM("Icmp6OutErrors", ICMP6_MIB_OUTERRORS),
 101         SNMP_MIB_SENTINEL
 102 };
 103
 104 /* RFC 4293 v6 ICMPMsgStatsTable; named items for RFC 2466 compatibility */
 105 static const char *const icmp6type2name[256] = {
 106         [ICMPV6_DEST_UNREACH] = "DestUnreachs",
 107         [ICMPV6_PKT_TOOBIG] = "PktTooBigs",
 108         [ICMPV6_TIME_EXCEED] = "TimeExcds",
 109         [ICMPV6_PARAMPROB] = "ParmProblems",
 110         [ICMPV6_ECHO_REQUEST] = "Echos",
 111         [ICMPV6_ECHO_REPLY] = "EchoReplies",
 112         [ICMPV6_MGM_QUERY] = "GroupMembQueries",
 113         [ICMPV6_MGM_REPORT] = "GroupMembResponses",
 114         [ICMPV6_MGM_REDUCTION] = "GroupMembReductions",
 115         [ICMPV6_MLD2_REPORT] = "MLDv2Reports",
 116         [NDISC_ROUTER_ADVERTISEMENT] = "RouterAdvertisements",
 117         [NDISC_ROUTER_SOLICITATION] = "RouterSolicits",
 118         [NDISC_NEIGHBOUR_ADVERTISEMENT] = "NeighborAdvertisements",
 119         [NDISC_NEIGHBOUR_SOLICITATION] = "NeighborSolicits",
 120         [NDISC_REDIRECT] = "Redirects",
 121 };
 122
 123
 124 static const struct snmp_mib snmp6_udp6_list[] = {
 125         SNMP_MIB_ITEM("Udp6InDatagrams", UDP_MIB_INDATAGRAMS),
 126         SNMP_MIB_ITEM("Udp6NoPorts", UDP_MIB_NOPORTS),
 127         SNMP_MIB_ITEM("Udp6InErrors", UDP_MIB_INERRORS),
 128         SNMP_MIB_ITEM("Udp6OutDatagrams", UDP_MIB_OUTDATAGRAMS),
 129         SNMP_MIB_ITEM("Udp6RcvbufErrors", UDP_MIB_RCVBUFERRORS),
 130         SNMP_MIB_ITEM("Udp6SndbufErrors", UDP_MIB_SNDBUFERRORS),
 131         SNMP_MIB_SENTINEL
 132 };
 133
 134 static const struct snmp_mib snmp6_udplite6_list[] = {
 135         SNMP_MIB_ITEM("UdpLite6InDatagrams", UDP_MIB_INDATAGRAMS),
 136         SNMP_MIB_ITEM("UdpLite6NoPorts", UDP_MIB_NOPORTS),
 137         SNMP_MIB_ITEM("UdpLite6InErrors", UDP_MIB_INERRORS),
 138         SNMP_MIB_ITEM("UdpLite6OutDatagrams", UDP_MIB_OUTDATAGRAMS),
 139         SNMP_MIB_ITEM("UdpLite6RcvbufErrors", UDP_MIB_RCVBUFERRORS),
 140         SNMP_MIB_ITEM("UdpLite6SndbufErrors", UDP_MIB_SNDBUFERRORS),
 141         SNMP_MIB_SENTINEL
 142 };
 143
 144 /* can be called either with percpu mib (pcpumib != NULL),
 145  * or shared one (smib != NULL)
 146  */
 147 static void snmp6_seq_show_icmpv6msg(struct seq_file *seq, void __percpu **pcpumib,
 148                                      atomic_long_t *smib)
 149 {
 150         char name[32];
 151         int i;
 152
 153         /* print by name -- deprecated items */
 154         for (i = 0; i < ICMP6MSG_MIB_MAX; i++) {
 155                 int icmptype;
 156                 const char *p;
 157
 158                 icmptype = i & 0xff;
 159                 p = icmp6type2name[icmptype];
 160                 if (!p) /* don't print un-named types here */
 161                         continue;
 162                 snprintf(name, sizeof(name), "Icmp6%s%s",
 163                         i & 0x100 ? "Out" : "In", p);
 164                 seq_printf(seq, "%-32s\t%lu\n", name,
 165                         pcpumib ? snmp_fold_field(pcpumib, i) : atomic_long_read(smib + i));
 166         }
 167
 168         /* print by number (nonzero only) - ICMPMsgStat format */
 169         for (i = 0; i < ICMP6MSG_MIB_MAX; i++) {
 170                 unsigned long val;
 171
 172                 val = pcpumib ? snmp_fold_field(pcpumib, i) : atomic_long_read(smib + i);
 173                 if (!val)
 174                         continue;
 175                 snprintf(name, sizeof(name), "Icmp6%sType%u",
 176                         i & 0x100 ?  "Out" : "In", i & 0xff);
 177                 seq_printf(seq, "%-32s\t%lu\n", name, val);
 178         }
 179 }
 180
 181 /* can be called either with percpu mib (pcpumib != NULL),
 182  * or shared one (smib != NULL)
 183  */
 184 static void snmp6_seq_show_item(struct seq_file *seq, void __percpu **pcpumib,
 185                                 atomic_long_t *smib,
 186                                 const struct snmp_mib *itemlist)
 187 {
 188         int i;
 189         unsigned long val;
 190
 191         for (i = 0; itemlist[i].name; i++) {
 192                 val = pcpumib ?
 193                         snmp_fold_field(pcpumib, itemlist[i].entry) :
 194                         atomic_long_read(smib + itemlist[i].entry);
 195                 seq_printf(seq, "%-32s\t%lu\n", itemlist[i].name, val);
 196         }
 197 }
 198
 199 static void snmp6_seq_show_item64(struct seq_file *seq, void __percpu **mib,
 200                                   const struct snmp_mib *itemlist, size_t syncpoff)
 201 {
 202         int i;
 203
 204         for (i = 0; itemlist[i].name; i++)
 205                 seq_printf(seq, "%-32s\t%llu\n", itemlist[i].name,
 206                            snmp_fold_field64(mib, itemlist[i].entry, syncpoff));
 207 }
 208
 209 static int snmp6_seq_show(struct seq_file *seq, void *v)
 210 {
 211         struct net *net = (struct net *)seq->private;
 212
 213         snmp6_seq_show_item64(seq, (void __percpu **)net->mib.ipv6_statistics,
 214                             snmp6_ipstats_list, offsetof(struct ipstats_mib, syncp));
 215         snmp6_seq_show_item(seq, (void __percpu **)net->mib.icmpv6_statistics,
 216                             NULL, snmp6_icmp6_list);
 217         snmp6_seq_show_icmpv6msg(seq,
 218                             (void __percpu **)net->mib.icmpv6msg_statistics, NULL);
 219         snmp6_seq_show_item(seq, (void __percpu **)net->mib.udp_stats_in6,
 220                             NULL, snmp6_udp6_list);
 221         snmp6_seq_show_item(seq, (void __percpu **)net->mib.udplite_stats_in6,
 222                             NULL, snmp6_udplite6_list);
 223         return 0;
 224 }
 225
 226 static int snmp6_seq_open(struct inode *inode, struct file *file)
 227 {
 228         return single_open_net(inode, file, snmp6_seq_show);
 229 }
 230
 231 static const struct file_operations snmp6_seq_fops = {
 232         .owner   = THIS_MODULE,
 233         .open    = snmp6_seq_open,
 234         .read    = seq_read,
 235         .llseek  = seq_lseek,
 236         .release = single_release_net,
 237 };
 238
 239 static int snmp6_dev_seq_show(struct seq_file *seq, void *v)
 240 {
 241         struct inet6_dev *idev = (struct inet6_dev *)seq->private;
 242
 243         seq_printf(seq, "%-32s\t%u\n", "ifIndex", idev->dev->ifindex);
 244         snmp6_seq_show_item(seq, (void __percpu **)idev->stats.ipv6, NULL,
 245                             snmp6_ipstats_list);
 246         snmp6_seq_show_item(seq, NULL, idev->stats.icmpv6dev->mibs,
 247                             snmp6_icmp6_list);
 248         snmp6_seq_show_icmpv6msg(seq, NULL, idev->stats.icmpv6msgdev->mibs);
 249         return 0;
 250 }
 251
 252 static int snmp6_dev_seq_open(struct inode *inode, struct file *file)
 253 {
 254         return single_open(file, snmp6_dev_seq_show, PDE(inode)->data);
 255 }
 256
 257 static const struct file_operations snmp6_dev_seq_fops = {
 258         .owner   = THIS_MODULE,
 259         .open    = snmp6_dev_seq_open,
 260         .read    = seq_read,
 261         .llseek  = seq_lseek,
 262         .release = single_release,
 263 };
 264
 265 int snmp6_register_dev(struct inet6_dev *idev)
 266 {
 267         struct proc_dir_entry *p;
 268         struct net *net;
 269
 270         if (!idev || !idev->dev)
 271                 return -EINVAL;
 272
 273         net = dev_net(idev->dev);
 274         if (!net->mib.proc_net_devsnmp6)
 275                 return -ENOENT;
 276
 277         p = proc_create_data(idev->dev->name, S_IRUGO,
 278                              net->mib.proc_net_devsnmp6,
 279                              &snmp6_dev_seq_fops, idev);
 280         if (!p)
 281                 return -ENOMEM;
 282
 283         idev->stats.proc_dir_entry = p;
 284         return 0;
 285 }
 286
 287 int snmp6_unregister_dev(struct inet6_dev *idev)
 288 {
 289         struct net *net = dev_net(idev->dev);
 290         if (!net->mib.proc_net_devsnmp6)
 291                 return -ENOENT;
 292         if (!idev->stats.proc_dir_entry)
 293                 return -EINVAL;
 294         remove_proc_entry(idev->stats.proc_dir_entry->name,
 295                           net->mib.proc_net_devsnmp6);
 296         idev->stats.proc_dir_entry = NULL;
 297         return 0;
 298 }
 299
 300 static int __net_init ipv6_proc_init_net(struct net *net)
 301 {
 302         if (!proc_net_fops_create(net, "sockstat6", S_IRUGO,
 303                         &sockstat6_seq_fops))
 304                 return -ENOMEM;
 305
 306         if (!proc_net_fops_create(net, "snmp6", S_IRUGO, &snmp6_seq_fops))
 307                 goto proc_snmp6_fail;
 308
 309         net->mib.proc_net_devsnmp6 = proc_mkdir("dev_snmp6", net->proc_net);
 310         if (!net->mib.proc_net_devsnmp6)
 311                 goto proc_dev_snmp6_fail;
 312         return 0;
 313
 314 proc_snmp6_fail:
 315         proc_net_remove(net, "sockstat6");
 316 proc_dev_snmp6_fail:
 317         proc_net_remove(net, "dev_snmp6");
 318         return -ENOMEM;
 319 }
 320
 321 static void __net_exit ipv6_proc_exit_net(struct net *net)
 322 {
 323         proc_net_remove(net, "sockstat6");
 324         proc_net_remove(net, "dev_snmp6");
 325         proc_net_remove(net, "snmp6");
 326 }
 327
 328 static struct pernet_operations ipv6_proc_ops = {
 329         .init = ipv6_proc_init_net,
 330         .exit = ipv6_proc_exit_net,
 331 };
 332
 333 int __init ipv6_misc_proc_init(void)
 334 {
 335         return register_pernet_subsys(&ipv6_proc_ops);
 336 }
 337
 338 void ipv6_misc_proc_exit(void)
 339 {
 340         unregister_pernet_subsys(&ipv6_proc_ops);
 341 }
 342