proc.c 10 KB

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  1. // SPDX-License-Identifier: GPL-2.0-or-later
  2. /*
  3. * INET An implementation of the TCP/IP protocol suite for the LINUX
  4. * operating system. INET is implemented using the BSD Socket
  5. * interface as the means of communication with the user level.
  6. *
  7. * This file implements the various access functions for the
  8. * PROC file system. This is very similar to the IPv4 version,
  9. * except it reports the sockets in the INET6 address family.
  10. *
  11. * Authors: David S. Miller (davem@caip.rutgers.edu)
  12. * YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org>
  13. */
  14. #include <linux/socket.h>
  15. #include <linux/net.h>
  16. #include <linux/ipv6.h>
  17. #include <linux/proc_fs.h>
  18. #include <linux/seq_file.h>
  19. #include <linux/stddef.h>
  20. #include <linux/export.h>
  21. #include <net/net_namespace.h>
  22. #include <net/ip.h>
  23. #include <net/sock.h>
  24. #include <net/tcp.h>
  25. #include <net/udp.h>
  26. #include <net/transp_v6.h>
  27. #include <net/ipv6.h>
  28. #define MAX4(a, b, c, d) \
  29. max_t(u32, max_t(u32, a, b), max_t(u32, c, d))
  30. #define SNMP_MIB_MAX MAX4(UDP_MIB_MAX, TCP_MIB_MAX, \
  31. IPSTATS_MIB_MAX, ICMP_MIB_MAX)
  32. static int sockstat6_seq_show(struct seq_file *seq, void *v)
  33. {
  34. struct net *net = seq->private;
  35. seq_printf(seq, "TCP6: inuse %d\n",
  36. sock_prot_inuse_get(net, &tcpv6_prot));
  37. seq_printf(seq, "UDP6: inuse %d\n",
  38. sock_prot_inuse_get(net, &udpv6_prot));
  39. seq_printf(seq, "UDPLITE6: inuse %d\n",
  40. sock_prot_inuse_get(net, &udplitev6_prot));
  41. seq_printf(seq, "RAW6: inuse %d\n",
  42. sock_prot_inuse_get(net, &rawv6_prot));
  43. seq_printf(seq, "FRAG6: inuse %u memory %lu\n",
  44. atomic_read(&net->ipv6.fqdir->rhashtable.nelems),
  45. frag_mem_limit(net->ipv6.fqdir));
  46. return 0;
  47. }
  48. static const struct snmp_mib snmp6_ipstats_list[] = {
  49. /* ipv6 mib according to RFC 2465 */
  50. SNMP_MIB_ITEM("Ip6InReceives", IPSTATS_MIB_INPKTS),
  51. SNMP_MIB_ITEM("Ip6InHdrErrors", IPSTATS_MIB_INHDRERRORS),
  52. SNMP_MIB_ITEM("Ip6InTooBigErrors", IPSTATS_MIB_INTOOBIGERRORS),
  53. SNMP_MIB_ITEM("Ip6InNoRoutes", IPSTATS_MIB_INNOROUTES),
  54. SNMP_MIB_ITEM("Ip6InAddrErrors", IPSTATS_MIB_INADDRERRORS),
  55. SNMP_MIB_ITEM("Ip6InUnknownProtos", IPSTATS_MIB_INUNKNOWNPROTOS),
  56. SNMP_MIB_ITEM("Ip6InTruncatedPkts", IPSTATS_MIB_INTRUNCATEDPKTS),
  57. SNMP_MIB_ITEM("Ip6InDiscards", IPSTATS_MIB_INDISCARDS),
  58. SNMP_MIB_ITEM("Ip6InDelivers", IPSTATS_MIB_INDELIVERS),
  59. SNMP_MIB_ITEM("Ip6OutForwDatagrams", IPSTATS_MIB_OUTFORWDATAGRAMS),
  60. SNMP_MIB_ITEM("Ip6OutRequests", IPSTATS_MIB_OUTPKTS),
  61. SNMP_MIB_ITEM("Ip6OutDiscards", IPSTATS_MIB_OUTDISCARDS),
  62. SNMP_MIB_ITEM("Ip6OutNoRoutes", IPSTATS_MIB_OUTNOROUTES),
  63. SNMP_MIB_ITEM("Ip6ReasmTimeout", IPSTATS_MIB_REASMTIMEOUT),
  64. SNMP_MIB_ITEM("Ip6ReasmReqds", IPSTATS_MIB_REASMREQDS),
  65. SNMP_MIB_ITEM("Ip6ReasmOKs", IPSTATS_MIB_REASMOKS),
  66. SNMP_MIB_ITEM("Ip6ReasmFails", IPSTATS_MIB_REASMFAILS),
  67. SNMP_MIB_ITEM("Ip6FragOKs", IPSTATS_MIB_FRAGOKS),
  68. SNMP_MIB_ITEM("Ip6FragFails", IPSTATS_MIB_FRAGFAILS),
  69. SNMP_MIB_ITEM("Ip6FragCreates", IPSTATS_MIB_FRAGCREATES),
  70. SNMP_MIB_ITEM("Ip6InMcastPkts", IPSTATS_MIB_INMCASTPKTS),
  71. SNMP_MIB_ITEM("Ip6OutMcastPkts", IPSTATS_MIB_OUTMCASTPKTS),
  72. SNMP_MIB_ITEM("Ip6InOctets", IPSTATS_MIB_INOCTETS),
  73. SNMP_MIB_ITEM("Ip6OutOctets", IPSTATS_MIB_OUTOCTETS),
  74. SNMP_MIB_ITEM("Ip6InMcastOctets", IPSTATS_MIB_INMCASTOCTETS),
  75. SNMP_MIB_ITEM("Ip6OutMcastOctets", IPSTATS_MIB_OUTMCASTOCTETS),
  76. SNMP_MIB_ITEM("Ip6InBcastOctets", IPSTATS_MIB_INBCASTOCTETS),
  77. SNMP_MIB_ITEM("Ip6OutBcastOctets", IPSTATS_MIB_OUTBCASTOCTETS),
  78. /* IPSTATS_MIB_CSUMERRORS is not relevant in IPv6 (no checksum) */
  79. SNMP_MIB_ITEM("Ip6InNoECTPkts", IPSTATS_MIB_NOECTPKTS),
  80. SNMP_MIB_ITEM("Ip6InECT1Pkts", IPSTATS_MIB_ECT1PKTS),
  81. SNMP_MIB_ITEM("Ip6InECT0Pkts", IPSTATS_MIB_ECT0PKTS),
  82. SNMP_MIB_ITEM("Ip6InCEPkts", IPSTATS_MIB_CEPKTS),
  83. SNMP_MIB_SENTINEL
  84. };
  85. static const struct snmp_mib snmp6_icmp6_list[] = {
  86. /* icmpv6 mib according to RFC 2466 */
  87. SNMP_MIB_ITEM("Icmp6InMsgs", ICMP6_MIB_INMSGS),
  88. SNMP_MIB_ITEM("Icmp6InErrors", ICMP6_MIB_INERRORS),
  89. SNMP_MIB_ITEM("Icmp6OutMsgs", ICMP6_MIB_OUTMSGS),
  90. SNMP_MIB_ITEM("Icmp6OutErrors", ICMP6_MIB_OUTERRORS),
  91. SNMP_MIB_ITEM("Icmp6InCsumErrors", ICMP6_MIB_CSUMERRORS),
  92. SNMP_MIB_SENTINEL
  93. };
  94. /* RFC 4293 v6 ICMPMsgStatsTable; named items for RFC 2466 compatibility */
  95. static const char *const icmp6type2name[256] = {
  96. [ICMPV6_DEST_UNREACH] = "DestUnreachs",
  97. [ICMPV6_PKT_TOOBIG] = "PktTooBigs",
  98. [ICMPV6_TIME_EXCEED] = "TimeExcds",
  99. [ICMPV6_PARAMPROB] = "ParmProblems",
  100. [ICMPV6_ECHO_REQUEST] = "Echos",
  101. [ICMPV6_ECHO_REPLY] = "EchoReplies",
  102. [ICMPV6_MGM_QUERY] = "GroupMembQueries",
  103. [ICMPV6_MGM_REPORT] = "GroupMembResponses",
  104. [ICMPV6_MGM_REDUCTION] = "GroupMembReductions",
  105. [ICMPV6_MLD2_REPORT] = "MLDv2Reports",
  106. [NDISC_ROUTER_ADVERTISEMENT] = "RouterAdvertisements",
  107. [NDISC_ROUTER_SOLICITATION] = "RouterSolicits",
  108. [NDISC_NEIGHBOUR_ADVERTISEMENT] = "NeighborAdvertisements",
  109. [NDISC_NEIGHBOUR_SOLICITATION] = "NeighborSolicits",
  110. [NDISC_REDIRECT] = "Redirects",
  111. };
  112. static const struct snmp_mib snmp6_udp6_list[] = {
  113. SNMP_MIB_ITEM("Udp6InDatagrams", UDP_MIB_INDATAGRAMS),
  114. SNMP_MIB_ITEM("Udp6NoPorts", UDP_MIB_NOPORTS),
  115. SNMP_MIB_ITEM("Udp6InErrors", UDP_MIB_INERRORS),
  116. SNMP_MIB_ITEM("Udp6OutDatagrams", UDP_MIB_OUTDATAGRAMS),
  117. SNMP_MIB_ITEM("Udp6RcvbufErrors", UDP_MIB_RCVBUFERRORS),
  118. SNMP_MIB_ITEM("Udp6SndbufErrors", UDP_MIB_SNDBUFERRORS),
  119. SNMP_MIB_ITEM("Udp6InCsumErrors", UDP_MIB_CSUMERRORS),
  120. SNMP_MIB_ITEM("Udp6IgnoredMulti", UDP_MIB_IGNOREDMULTI),
  121. SNMP_MIB_SENTINEL
  122. };
  123. static const struct snmp_mib snmp6_udplite6_list[] = {
  124. SNMP_MIB_ITEM("UdpLite6InDatagrams", UDP_MIB_INDATAGRAMS),
  125. SNMP_MIB_ITEM("UdpLite6NoPorts", UDP_MIB_NOPORTS),
  126. SNMP_MIB_ITEM("UdpLite6InErrors", UDP_MIB_INERRORS),
  127. SNMP_MIB_ITEM("UdpLite6OutDatagrams", UDP_MIB_OUTDATAGRAMS),
  128. SNMP_MIB_ITEM("UdpLite6RcvbufErrors", UDP_MIB_RCVBUFERRORS),
  129. SNMP_MIB_ITEM("UdpLite6SndbufErrors", UDP_MIB_SNDBUFERRORS),
  130. SNMP_MIB_ITEM("UdpLite6InCsumErrors", UDP_MIB_CSUMERRORS),
  131. SNMP_MIB_SENTINEL
  132. };
  133. static void snmp6_seq_show_icmpv6msg(struct seq_file *seq, atomic_long_t *smib)
  134. {
  135. char name[32];
  136. int i;
  137. /* print by name -- deprecated items */
  138. for (i = 0; i < ICMP6MSG_MIB_MAX; i++) {
  139. int icmptype;
  140. const char *p;
  141. icmptype = i & 0xff;
  142. p = icmp6type2name[icmptype];
  143. if (!p) /* don't print un-named types here */
  144. continue;
  145. snprintf(name, sizeof(name), "Icmp6%s%s",
  146. i & 0x100 ? "Out" : "In", p);
  147. seq_printf(seq, "%-32s\t%lu\n", name,
  148. atomic_long_read(smib + i));
  149. }
  150. /* print by number (nonzero only) - ICMPMsgStat format */
  151. for (i = 0; i < ICMP6MSG_MIB_MAX; i++) {
  152. unsigned long val;
  153. val = atomic_long_read(smib + i);
  154. if (!val)
  155. continue;
  156. snprintf(name, sizeof(name), "Icmp6%sType%u",
  157. i & 0x100 ? "Out" : "In", i & 0xff);
  158. seq_printf(seq, "%-32s\t%lu\n", name, val);
  159. }
  160. }
  161. /* can be called either with percpu mib (pcpumib != NULL),
  162. * or shared one (smib != NULL)
  163. */
  164. static void snmp6_seq_show_item(struct seq_file *seq, void __percpu *pcpumib,
  165. atomic_long_t *smib,
  166. const struct snmp_mib *itemlist)
  167. {
  168. unsigned long buff[SNMP_MIB_MAX];
  169. int i;
  170. if (pcpumib) {
  171. memset(buff, 0, sizeof(unsigned long) * SNMP_MIB_MAX);
  172. snmp_get_cpu_field_batch(buff, itemlist, pcpumib);
  173. for (i = 0; itemlist[i].name; i++)
  174. seq_printf(seq, "%-32s\t%lu\n",
  175. itemlist[i].name, buff[i]);
  176. } else {
  177. for (i = 0; itemlist[i].name; i++)
  178. seq_printf(seq, "%-32s\t%lu\n", itemlist[i].name,
  179. atomic_long_read(smib + itemlist[i].entry));
  180. }
  181. }
  182. static void snmp6_seq_show_item64(struct seq_file *seq, void __percpu *mib,
  183. const struct snmp_mib *itemlist, size_t syncpoff)
  184. {
  185. u64 buff64[SNMP_MIB_MAX];
  186. int i;
  187. memset(buff64, 0, sizeof(u64) * SNMP_MIB_MAX);
  188. snmp_get_cpu_field64_batch(buff64, itemlist, mib, syncpoff);
  189. for (i = 0; itemlist[i].name; i++)
  190. seq_printf(seq, "%-32s\t%llu\n", itemlist[i].name, buff64[i]);
  191. }
  192. static int snmp6_seq_show(struct seq_file *seq, void *v)
  193. {
  194. struct net *net = (struct net *)seq->private;
  195. snmp6_seq_show_item64(seq, net->mib.ipv6_statistics,
  196. snmp6_ipstats_list, offsetof(struct ipstats_mib, syncp));
  197. snmp6_seq_show_item(seq, net->mib.icmpv6_statistics,
  198. NULL, snmp6_icmp6_list);
  199. snmp6_seq_show_icmpv6msg(seq, net->mib.icmpv6msg_statistics->mibs);
  200. snmp6_seq_show_item(seq, net->mib.udp_stats_in6,
  201. NULL, snmp6_udp6_list);
  202. snmp6_seq_show_item(seq, net->mib.udplite_stats_in6,
  203. NULL, snmp6_udplite6_list);
  204. return 0;
  205. }
  206. static int snmp6_dev_seq_show(struct seq_file *seq, void *v)
  207. {
  208. struct inet6_dev *idev = (struct inet6_dev *)seq->private;
  209. seq_printf(seq, "%-32s\t%u\n", "ifIndex", idev->dev->ifindex);
  210. snmp6_seq_show_item64(seq, idev->stats.ipv6,
  211. snmp6_ipstats_list, offsetof(struct ipstats_mib, syncp));
  212. snmp6_seq_show_item(seq, NULL, idev->stats.icmpv6dev->mibs,
  213. snmp6_icmp6_list);
  214. snmp6_seq_show_icmpv6msg(seq, idev->stats.icmpv6msgdev->mibs);
  215. return 0;
  216. }
  217. int snmp6_register_dev(struct inet6_dev *idev)
  218. {
  219. struct proc_dir_entry *p;
  220. struct net *net;
  221. if (!idev || !idev->dev)
  222. return -EINVAL;
  223. net = dev_net(idev->dev);
  224. if (!net->mib.proc_net_devsnmp6)
  225. return -ENOENT;
  226. p = proc_create_single_data(idev->dev->name, 0444,
  227. net->mib.proc_net_devsnmp6, snmp6_dev_seq_show, idev);
  228. if (!p)
  229. return -ENOMEM;
  230. idev->stats.proc_dir_entry = p;
  231. return 0;
  232. }
  233. int snmp6_unregister_dev(struct inet6_dev *idev)
  234. {
  235. struct net *net = dev_net(idev->dev);
  236. if (!net->mib.proc_net_devsnmp6)
  237. return -ENOENT;
  238. if (!idev->stats.proc_dir_entry)
  239. return -EINVAL;
  240. proc_remove(idev->stats.proc_dir_entry);
  241. idev->stats.proc_dir_entry = NULL;
  242. return 0;
  243. }
  244. static int __net_init ipv6_proc_init_net(struct net *net)
  245. {
  246. if (!proc_create_net_single("sockstat6", 0444, net->proc_net,
  247. sockstat6_seq_show, NULL))
  248. return -ENOMEM;
  249. if (!proc_create_net_single("snmp6", 0444, net->proc_net,
  250. snmp6_seq_show, NULL))
  251. goto proc_snmp6_fail;
  252. net->mib.proc_net_devsnmp6 = proc_mkdir("dev_snmp6", net->proc_net);
  253. if (!net->mib.proc_net_devsnmp6)
  254. goto proc_dev_snmp6_fail;
  255. return 0;
  256. proc_dev_snmp6_fail:
  257. remove_proc_entry("snmp6", net->proc_net);
  258. proc_snmp6_fail:
  259. remove_proc_entry("sockstat6", net->proc_net);
  260. return -ENOMEM;
  261. }
  262. static void __net_exit ipv6_proc_exit_net(struct net *net)
  263. {
  264. remove_proc_entry("sockstat6", net->proc_net);
  265. remove_proc_entry("dev_snmp6", net->proc_net);
  266. remove_proc_entry("snmp6", net->proc_net);
  267. }
  268. static struct pernet_operations ipv6_proc_ops = {
  269. .init = ipv6_proc_init_net,
  270. .exit = ipv6_proc_exit_net,
  271. };
  272. int __init ipv6_misc_proc_init(void)
  273. {
  274. return register_pernet_subsys(&ipv6_proc_ops);
  275. }
  276. void ipv6_misc_proc_exit(void)
  277. {
  278. unregister_pernet_subsys(&ipv6_proc_ops);
  279. }