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 29 #define MAX4(a, b, c, d) \ 30 MAX_T(u32, MAX_T(u32, a, b), MAX_T(u32, c, d)) 31 #define SNMP_MIB_MAX MAX4(UDP_MIB_MAX, TCP_MIB_MAX, \ 32 IPSTATS_MIB_MAX, ICMP_MIB_MAX) 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 %u memory %lu\n", 47 atomic_read(&net->ipv6.fqdir->rhashtable.nelems), 48 frag_mem_limit(net->ipv6.fqdir)); 49 return 0; 50 } 51 52 static const struct snmp_mib snmp6_ipstats_list[] = { 53 /* ipv6 mib according to RFC 2465 */ 54 SNMP_MIB_ITEM("Ip6InReceives", IPSTATS_MIB_INPKTS), 55 SNMP_MIB_ITEM("Ip6InHdrErrors", IPSTATS_MIB_INHDRERRORS), 56 SNMP_MIB_ITEM("Ip6InTooBigErrors", IPSTATS_MIB_INTOOBIGERRORS), 57 SNMP_MIB_ITEM("Ip6InNoRoutes", IPSTATS_MIB_INNOROUTES), 58 SNMP_MIB_ITEM("Ip6InAddrErrors", IPSTATS_MIB_INADDRERRORS), 59 SNMP_MIB_ITEM("Ip6InUnknownProtos", IPSTATS_MIB_INUNKNOWNPROTOS), 60 SNMP_MIB_ITEM("Ip6InTruncatedPkts", IPSTATS_MIB_INTRUNCATEDPKTS), 61 SNMP_MIB_ITEM("Ip6InDiscards", IPSTATS_MIB_INDISCARDS), 62 SNMP_MIB_ITEM("Ip6InDelivers", IPSTATS_MIB_INDELIVERS), 63 SNMP_MIB_ITEM("Ip6OutForwDatagrams", IPSTATS_MIB_OUTFORWDATAGRAMS), 64 SNMP_MIB_ITEM("Ip6OutRequests", IPSTATS_MIB_OUTREQUESTS), 65 SNMP_MIB_ITEM("Ip6OutDiscards", IPSTATS_MIB_OUTDISCARDS), 66 SNMP_MIB_ITEM("Ip6OutNoRoutes", IPSTATS_MIB_OUTNOROUTES), 67 SNMP_MIB_ITEM("Ip6ReasmTimeout", IPSTATS_MIB_REASMTIMEOUT), 68 SNMP_MIB_ITEM("Ip6ReasmReqds", IPSTATS_MIB_REASMREQDS), 69 SNMP_MIB_ITEM("Ip6ReasmOKs", IPSTATS_MIB_REASMOKS), 70 SNMP_MIB_ITEM("Ip6ReasmFails", IPSTATS_MIB_REASMFAILS), 71 SNMP_MIB_ITEM("Ip6FragOKs", IPSTATS_MIB_FRAGOKS), 72 SNMP_MIB_ITEM("Ip6FragFails", IPSTATS_MIB_FRAGFAILS), 73 SNMP_MIB_ITEM("Ip6FragCreates", IPSTATS_MIB_FRAGCREATES), 74 SNMP_MIB_ITEM("Ip6InMcastPkts", IPSTATS_MIB_INMCASTPKTS), 75 SNMP_MIB_ITEM("Ip6OutMcastPkts", IPSTATS_MIB_OUTMCASTPKTS), 76 SNMP_MIB_ITEM("Ip6InOctets", IPSTATS_MIB_INOCTETS), 77 SNMP_MIB_ITEM("Ip6OutOctets", IPSTATS_MIB_OUTOCTETS), 78 SNMP_MIB_ITEM("Ip6InMcastOctets", IPSTATS_MIB_INMCASTOCTETS), 79 SNMP_MIB_ITEM("Ip6OutMcastOctets", IPSTATS_MIB_OUTMCASTOCTETS), 80 SNMP_MIB_ITEM("Ip6InBcastOctets", IPSTATS_MIB_INBCASTOCTETS), 81 SNMP_MIB_ITEM("Ip6OutBcastOctets", IPSTATS_MIB_OUTBCASTOCTETS), 82 /* IPSTATS_MIB_CSUMERRORS is not relevant in IPv6 (no checksum) */ 83 SNMP_MIB_ITEM("Ip6InNoECTPkts", IPSTATS_MIB_NOECTPKTS), 84 SNMP_MIB_ITEM("Ip6InECT1Pkts", IPSTATS_MIB_ECT1PKTS), 85 SNMP_MIB_ITEM("Ip6InECT0Pkts", IPSTATS_MIB_ECT0PKTS), 86 SNMP_MIB_ITEM("Ip6InCEPkts", IPSTATS_MIB_CEPKTS), 87 SNMP_MIB_ITEM("Ip6OutTransmits", IPSTATS_MIB_OUTPKTS), 88 }; 89 90 static const struct snmp_mib snmp6_icmp6_list[] = { 91 /* icmpv6 mib according to RFC 2466 */ 92 SNMP_MIB_ITEM("Icmp6InMsgs", ICMP6_MIB_INMSGS), 93 SNMP_MIB_ITEM("Icmp6InErrors", ICMP6_MIB_INERRORS), 94 SNMP_MIB_ITEM("Icmp6OutMsgs", ICMP6_MIB_OUTMSGS), 95 SNMP_MIB_ITEM("Icmp6OutErrors", ICMP6_MIB_OUTERRORS), 96 SNMP_MIB_ITEM("Icmp6InCsumErrors", ICMP6_MIB_CSUMERRORS), 97 /* ICMP6_MIB_RATELIMITHOST needs to be last, see snmp6_dev_seq_show(). */ 98 SNMP_MIB_ITEM("Icmp6OutRateLimitHost", ICMP6_MIB_RATELIMITHOST), 99 }; 100 101 static const struct snmp_mib snmp6_udp6_list[] = { 102 SNMP_MIB_ITEM("Udp6InDatagrams", UDP_MIB_INDATAGRAMS), 103 SNMP_MIB_ITEM("Udp6NoPorts", UDP_MIB_NOPORTS), 104 SNMP_MIB_ITEM("Udp6InErrors", UDP_MIB_INERRORS), 105 SNMP_MIB_ITEM("Udp6OutDatagrams", UDP_MIB_OUTDATAGRAMS), 106 SNMP_MIB_ITEM("Udp6RcvbufErrors", UDP_MIB_RCVBUFERRORS), 107 SNMP_MIB_ITEM("Udp6SndbufErrors", UDP_MIB_SNDBUFERRORS), 108 SNMP_MIB_ITEM("Udp6InCsumErrors", UDP_MIB_CSUMERRORS), 109 SNMP_MIB_ITEM("Udp6IgnoredMulti", UDP_MIB_IGNOREDMULTI), 110 SNMP_MIB_ITEM("Udp6MemErrors", UDP_MIB_MEMERRORS), 111 }; 112 113 static const struct snmp_mib snmp6_udplite6_list[] = { 114 SNMP_MIB_ITEM("UdpLite6InDatagrams", UDP_MIB_INDATAGRAMS), 115 SNMP_MIB_ITEM("UdpLite6NoPorts", UDP_MIB_NOPORTS), 116 SNMP_MIB_ITEM("UdpLite6InErrors", UDP_MIB_INERRORS), 117 SNMP_MIB_ITEM("UdpLite6OutDatagrams", UDP_MIB_OUTDATAGRAMS), 118 SNMP_MIB_ITEM("UdpLite6RcvbufErrors", UDP_MIB_RCVBUFERRORS), 119 SNMP_MIB_ITEM("UdpLite6SndbufErrors", UDP_MIB_SNDBUFERRORS), 120 SNMP_MIB_ITEM("UdpLite6InCsumErrors", UDP_MIB_CSUMERRORS), 121 SNMP_MIB_ITEM("UdpLite6MemErrors", UDP_MIB_MEMERRORS), 122 }; 123 124 static void snmp6_seq_show_icmpv6msg(struct seq_file *seq, atomic_long_t *smib) 125 { 126 char name[32]; 127 int i; 128 129 /* print by name -- deprecated items */ 130 for (i = 0; i < ICMP6MSG_MIB_MAX; i++) { 131 const char *p = NULL; 132 int icmptype; 133 134 #define CASE(TYP, STR) case TYP: p = STR; break; 135 136 icmptype = i & 0xff; 137 switch (icmptype) { 138 /* RFC 4293 v6 ICMPMsgStatsTable; named items for RFC 2466 compatibility */ 139 CASE(ICMPV6_DEST_UNREACH, "DestUnreachs") 140 CASE(ICMPV6_PKT_TOOBIG, "PktTooBigs") 141 CASE(ICMPV6_TIME_EXCEED, "TimeExcds") 142 CASE(ICMPV6_PARAMPROB, "ParmProblems") 143 CASE(ICMPV6_ECHO_REQUEST, "Echos") 144 CASE(ICMPV6_ECHO_REPLY, "EchoReplies") 145 CASE(ICMPV6_MGM_QUERY, "GroupMembQueries") 146 CASE(ICMPV6_MGM_REPORT, "GroupMembResponses") 147 CASE(ICMPV6_MGM_REDUCTION, "GroupMembReductions") 148 CASE(ICMPV6_MLD2_REPORT, "MLDv2Reports") 149 CASE(NDISC_ROUTER_ADVERTISEMENT, "RouterAdvertisements") 150 CASE(NDISC_ROUTER_SOLICITATION, "RouterSolicits") 151 CASE(NDISC_NEIGHBOUR_ADVERTISEMENT, "NeighborAdvertisements") 152 CASE(NDISC_NEIGHBOUR_SOLICITATION, "NeighborSolicits") 153 CASE(NDISC_REDIRECT, "Redirects") 154 } 155 #undef CASE 156 if (!p) /* don't print un-named types here */ 157 continue; 158 snprintf(name, sizeof(name), "Icmp6%s%s", 159 i & 0x100 ? "Out" : "In", p); 160 seq_printf(seq, "%-32s\t%lu\n", name, 161 atomic_long_read(smib + i)); 162 } 163 164 /* print by number (nonzero only) - ICMPMsgStat format */ 165 for (i = 0; i < ICMP6MSG_MIB_MAX; i++) { 166 unsigned long val; 167 168 val = atomic_long_read(smib + i); 169 if (!val) 170 continue; 171 snprintf(name, sizeof(name), "Icmp6%sType%u", 172 i & 0x100 ? "Out" : "In", i & 0xff); 173 seq_printf(seq, "%-32s\t%lu\n", name, val); 174 } 175 } 176 177 /* can be called either with percpu mib (pcpumib != NULL), 178 * or shared one (smib != NULL) 179 */ 180 static void snmp6_seq_show_item(struct seq_file *seq, void __percpu *pcpumib, 181 atomic_long_t *smib, 182 const struct snmp_mib *itemlist, 183 int cnt) 184 { 185 unsigned long buff[SNMP_MIB_MAX]; 186 int i; 187 188 if (pcpumib) { 189 memset(buff, 0, sizeof(unsigned long) * cnt); 190 191 snmp_get_cpu_field_batch_cnt(buff, itemlist, cnt, pcpumib); 192 for (i = 0; i < cnt; i++) 193 seq_printf(seq, "%-32s\t%lu\n", 194 itemlist[i].name, buff[i]); 195 } else { 196 for (i = 0; i < cnt; i++) 197 seq_printf(seq, "%-32s\t%lu\n", itemlist[i].name, 198 atomic_long_read(smib + itemlist[i].entry)); 199 } 200 } 201 202 static void snmp6_seq_show_item64(struct seq_file *seq, void __percpu *mib, 203 const struct snmp_mib *itemlist, 204 int cnt, size_t syncpoff) 205 { 206 u64 buff64[SNMP_MIB_MAX]; 207 int i; 208 209 memset(buff64, 0, sizeof(u64) * cnt); 210 211 snmp_get_cpu_field64_batch_cnt(buff64, itemlist, cnt, mib, syncpoff); 212 for (i = 0; i < cnt; i++) 213 seq_printf(seq, "%-32s\t%llu\n", itemlist[i].name, buff64[i]); 214 } 215 216 static int snmp6_seq_show(struct seq_file *seq, void *v) 217 { 218 struct net *net = (struct net *)seq->private; 219 220 snmp6_seq_show_item64(seq, net->mib.ipv6_statistics, 221 snmp6_ipstats_list, 222 ARRAY_SIZE(snmp6_ipstats_list), 223 offsetof(struct ipstats_mib, syncp)); 224 snmp6_seq_show_item(seq, net->mib.icmpv6_statistics, 225 NULL, snmp6_icmp6_list, 226 ARRAY_SIZE(snmp6_icmp6_list)); 227 snmp6_seq_show_icmpv6msg(seq, net->mib.icmpv6msg_statistics->mibs); 228 snmp6_seq_show_item(seq, net->mib.udp_stats_in6, 229 NULL, snmp6_udp6_list, 230 ARRAY_SIZE(snmp6_udp6_list)); 231 snmp6_seq_show_item(seq, net->mib.udplite_stats_in6, 232 NULL, snmp6_udplite6_list, 233 ARRAY_SIZE(snmp6_udplite6_list)); 234 return 0; 235 } 236 237 static int snmp6_dev_seq_show(struct seq_file *seq, void *v) 238 { 239 struct inet6_dev *idev = (struct inet6_dev *)seq->private; 240 241 seq_printf(seq, "%-32s\t%u\n", "ifIndex", idev->dev->ifindex); 242 snmp6_seq_show_item64(seq, idev->stats.ipv6, 243 snmp6_ipstats_list, 244 ARRAY_SIZE(snmp6_ipstats_list), 245 offsetof(struct ipstats_mib, syncp)); 246 247 /* Per idev icmp stats do not have ICMP6_MIB_RATELIMITHOST */ 248 snmp6_seq_show_item(seq, NULL, idev->stats.icmpv6dev->mibs, 249 snmp6_icmp6_list, ARRAY_SIZE(snmp6_icmp6_list) - 1); 250 251 snmp6_seq_show_icmpv6msg(seq, idev->stats.icmpv6msgdev->mibs); 252 return 0; 253 } 254 255 int snmp6_register_dev(struct inet6_dev *idev) 256 { 257 struct proc_dir_entry *p; 258 struct net *net; 259 260 if (!idev || !idev->dev) 261 return -EINVAL; 262 263 net = dev_net(idev->dev); 264 if (!net->mib.proc_net_devsnmp6) 265 return -ENOENT; 266 267 p = proc_create_single_data(idev->dev->name, 0444, 268 net->mib.proc_net_devsnmp6, snmp6_dev_seq_show, idev); 269 if (!p) 270 return -ENOMEM; 271 272 idev->stats.proc_dir_entry = p; 273 return 0; 274 } 275 276 int snmp6_unregister_dev(struct inet6_dev *idev) 277 { 278 struct net *net = dev_net(idev->dev); 279 if (!net->mib.proc_net_devsnmp6) 280 return -ENOENT; 281 if (!idev->stats.proc_dir_entry) 282 return -EINVAL; 283 proc_remove(idev->stats.proc_dir_entry); 284 idev->stats.proc_dir_entry = NULL; 285 return 0; 286 } 287 288 static int __net_init ipv6_proc_init_net(struct net *net) 289 { 290 if (!proc_create_net_single("sockstat6", 0444, net->proc_net, 291 sockstat6_seq_show, NULL)) 292 return -ENOMEM; 293 294 if (!proc_create_net_single("snmp6", 0444, net->proc_net, 295 snmp6_seq_show, NULL)) 296 goto proc_snmp6_fail; 297 298 net->mib.proc_net_devsnmp6 = proc_mkdir("dev_snmp6", net->proc_net); 299 if (!net->mib.proc_net_devsnmp6) 300 goto proc_dev_snmp6_fail; 301 return 0; 302 303 proc_dev_snmp6_fail: 304 remove_proc_entry("snmp6", net->proc_net); 305 proc_snmp6_fail: 306 remove_proc_entry("sockstat6", net->proc_net); 307 return -ENOMEM; 308 } 309 310 static void __net_exit ipv6_proc_exit_net(struct net *net) 311 { 312 remove_proc_entry("sockstat6", net->proc_net); 313 remove_proc_entry("dev_snmp6", net->proc_net); 314 remove_proc_entry("snmp6", net->proc_net); 315 } 316 317 static struct pernet_operations ipv6_proc_ops = { 318 .init = ipv6_proc_init_net, 319 .exit = ipv6_proc_exit_net, 320 }; 321 322 int __init ipv6_misc_proc_init(void) 323 { 324 return register_pernet_subsys(&ipv6_proc_ops); 325 } 326 327 void ipv6_misc_proc_exit(void) 328 { 329 unregister_pernet_subsys(&ipv6_proc_ops); 330 } 331