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_OUTPKTS), 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_SENTINEL 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 SNMP_MIB_SENTINEL 98 }; 99 100 /* RFC 4293 v6 ICMPMsgStatsTable; named items for RFC 2466 compatibility */ 101 static const char *const icmp6type2name[256] = { 102 [ICMPV6_DEST_UNREACH] = "DestUnreachs", 103 [ICMPV6_PKT_TOOBIG] = "PktTooBigs", 104 [ICMPV6_TIME_EXCEED] = "TimeExcds", 105 [ICMPV6_PARAMPROB] = "ParmProblems", 106 [ICMPV6_ECHO_REQUEST] = "Echos", 107 [ICMPV6_ECHO_REPLY] = "EchoReplies", 108 [ICMPV6_MGM_QUERY] = "GroupMembQueries", 109 [ICMPV6_MGM_REPORT] = "GroupMembResponses", 110 [ICMPV6_MGM_REDUCTION] = "GroupMembReductions", 111 [ICMPV6_MLD2_REPORT] = "MLDv2Reports", 112 [NDISC_ROUTER_ADVERTISEMENT] = "RouterAdvertisements", 113 [NDISC_ROUTER_SOLICITATION] = "RouterSolicits", 114 [NDISC_NEIGHBOUR_ADVERTISEMENT] = "NeighborAdvertisements", 115 [NDISC_NEIGHBOUR_SOLICITATION] = "NeighborSolicits", 116 [NDISC_REDIRECT] = "Redirects", 117 }; 118 119 120 static const struct snmp_mib snmp6_udp6_list[] = { 121 SNMP_MIB_ITEM("Udp6InDatagrams", UDP_MIB_INDATAGRAMS), 122 SNMP_MIB_ITEM("Udp6NoPorts", UDP_MIB_NOPORTS), 123 SNMP_MIB_ITEM("Udp6InErrors", UDP_MIB_INERRORS), 124 SNMP_MIB_ITEM("Udp6OutDatagrams", UDP_MIB_OUTDATAGRAMS), 125 SNMP_MIB_ITEM("Udp6RcvbufErrors", UDP_MIB_RCVBUFERRORS), 126 SNMP_MIB_ITEM("Udp6SndbufErrors", UDP_MIB_SNDBUFERRORS), 127 SNMP_MIB_ITEM("Udp6InCsumErrors", UDP_MIB_CSUMERRORS), 128 SNMP_MIB_ITEM("Udp6IgnoredMulti", UDP_MIB_IGNOREDMULTI), 129 SNMP_MIB_SENTINEL 130 }; 131 132 static const struct snmp_mib snmp6_udplite6_list[] = { 133 SNMP_MIB_ITEM("UdpLite6InDatagrams", UDP_MIB_INDATAGRAMS), 134 SNMP_MIB_ITEM("UdpLite6NoPorts", UDP_MIB_NOPORTS), 135 SNMP_MIB_ITEM("UdpLite6InErrors", UDP_MIB_INERRORS), 136 SNMP_MIB_ITEM("UdpLite6OutDatagrams", UDP_MIB_OUTDATAGRAMS), 137 SNMP_MIB_ITEM("UdpLite6RcvbufErrors", UDP_MIB_RCVBUFERRORS), 138 SNMP_MIB_ITEM("UdpLite6SndbufErrors", UDP_MIB_SNDBUFERRORS), 139 SNMP_MIB_ITEM("UdpLite6InCsumErrors", UDP_MIB_CSUMERRORS), 140 SNMP_MIB_SENTINEL 141 }; 142 143 static void snmp6_seq_show_icmpv6msg(struct seq_file *seq, atomic_long_t *smib) 144 { 145 char name[32]; 146 int i; 147 148 /* print by name -- deprecated items */ 149 for (i = 0; i < ICMP6MSG_MIB_MAX; i++) { 150 int icmptype; 151 const char *p; 152 153 icmptype = i & 0xff; 154 p = icmp6type2name[icmptype]; 155 if (!p) /* don't print un-named types here */ 156 continue; 157 snprintf(name, sizeof(name), "Icmp6%s%s", 158 i & 0x100 ? "Out" : "In", p); 159 seq_printf(seq, "%-32s\t%lu\n", name, 160 atomic_long_read(smib + i)); 161 } 162 163 /* print by number (nonzero only) - ICMPMsgStat format */ 164 for (i = 0; i < ICMP6MSG_MIB_MAX; i++) { 165 unsigned long val; 166 167 val = atomic_long_read(smib + i); 168 if (!val) 169 continue; 170 snprintf(name, sizeof(name), "Icmp6%sType%u", 171 i & 0x100 ? "Out" : "In", i & 0xff); 172 seq_printf(seq, "%-32s\t%lu\n", name, val); 173 } 174 } 175 176 /* can be called either with percpu mib (pcpumib != NULL), 177 * or shared one (smib != NULL) 178 */ 179 static void snmp6_seq_show_item(struct seq_file *seq, void __percpu *pcpumib, 180 atomic_long_t *smib, 181 const struct snmp_mib *itemlist) 182 { 183 unsigned long buff[SNMP_MIB_MAX]; 184 int i; 185 186 if (pcpumib) { 187 memset(buff, 0, sizeof(unsigned long) * SNMP_MIB_MAX); 188 189 snmp_get_cpu_field_batch(buff, itemlist, pcpumib); 190 for (i = 0; itemlist[i].name; i++) 191 seq_printf(seq, "%-32s\t%lu\n", 192 itemlist[i].name, buff[i]); 193 } else { 194 for (i = 0; itemlist[i].name; i++) 195 seq_printf(seq, "%-32s\t%lu\n", itemlist[i].name, 196 atomic_long_read(smib + itemlist[i].entry)); 197 } 198 } 199 200 static void snmp6_seq_show_item64(struct seq_file *seq, void __percpu *mib, 201 const struct snmp_mib *itemlist, size_t syncpoff) 202 { 203 u64 buff64[SNMP_MIB_MAX]; 204 int i; 205 206 memset(buff64, 0, sizeof(u64) * SNMP_MIB_MAX); 207 208 snmp_get_cpu_field64_batch(buff64, itemlist, mib, syncpoff); 209 for (i = 0; itemlist[i].name; i++) 210 seq_printf(seq, "%-32s\t%llu\n", itemlist[i].name, buff64[i]); 211 } 212 213 static int snmp6_seq_show(struct seq_file *seq, void *v) 214 { 215 struct net *net = (struct net *)seq->private; 216 217 snmp6_seq_show_item64(seq, net->mib.ipv6_statistics, 218 snmp6_ipstats_list, offsetof(struct ipstats_mib, syncp)); 219 snmp6_seq_show_item(seq, net->mib.icmpv6_statistics, 220 NULL, snmp6_icmp6_list); 221 snmp6_seq_show_icmpv6msg(seq, net->mib.icmpv6msg_statistics->mibs); 222 snmp6_seq_show_item(seq, net->mib.udp_stats_in6, 223 NULL, snmp6_udp6_list); 224 snmp6_seq_show_item(seq, net->mib.udplite_stats_in6, 225 NULL, snmp6_udplite6_list); 226 return 0; 227 } 228 229 static int snmp6_dev_seq_show(struct seq_file *seq, void *v) 230 { 231 struct inet6_dev *idev = (struct inet6_dev *)seq->private; 232 233 seq_printf(seq, "%-32s\t%u\n", "ifIndex", idev->dev->ifindex); 234 snmp6_seq_show_item64(seq, idev->stats.ipv6, 235 snmp6_ipstats_list, offsetof(struct ipstats_mib, syncp)); 236 snmp6_seq_show_item(seq, NULL, idev->stats.icmpv6dev->mibs, 237 snmp6_icmp6_list); 238 snmp6_seq_show_icmpv6msg(seq, idev->stats.icmpv6msgdev->mibs); 239 return 0; 240 } 241 242 int snmp6_register_dev(struct inet6_dev *idev) 243 { 244 struct proc_dir_entry *p; 245 struct net *net; 246 247 if (!idev || !idev->dev) 248 return -EINVAL; 249 250 net = dev_net(idev->dev); 251 if (!net->mib.proc_net_devsnmp6) 252 return -ENOENT; 253 254 p = proc_create_single_data(idev->dev->name, 0444, 255 net->mib.proc_net_devsnmp6, snmp6_dev_seq_show, idev); 256 if (!p) 257 return -ENOMEM; 258 259 idev->stats.proc_dir_entry = p; 260 return 0; 261 } 262 263 int snmp6_unregister_dev(struct inet6_dev *idev) 264 { 265 struct net *net = dev_net(idev->dev); 266 if (!net->mib.proc_net_devsnmp6) 267 return -ENOENT; 268 if (!idev->stats.proc_dir_entry) 269 return -EINVAL; 270 proc_remove(idev->stats.proc_dir_entry); 271 idev->stats.proc_dir_entry = NULL; 272 return 0; 273 } 274 275 static int __net_init ipv6_proc_init_net(struct net *net) 276 { 277 if (!proc_create_net_single("sockstat6", 0444, net->proc_net, 278 sockstat6_seq_show, NULL)) 279 return -ENOMEM; 280 281 if (!proc_create_net_single("snmp6", 0444, net->proc_net, 282 snmp6_seq_show, NULL)) 283 goto proc_snmp6_fail; 284 285 net->mib.proc_net_devsnmp6 = proc_mkdir("dev_snmp6", net->proc_net); 286 if (!net->mib.proc_net_devsnmp6) 287 goto proc_dev_snmp6_fail; 288 return 0; 289 290 proc_dev_snmp6_fail: 291 remove_proc_entry("snmp6", net->proc_net); 292 proc_snmp6_fail: 293 remove_proc_entry("sockstat6", net->proc_net); 294 return -ENOMEM; 295 } 296 297 static void __net_exit ipv6_proc_exit_net(struct net *net) 298 { 299 remove_proc_entry("sockstat6", net->proc_net); 300 remove_proc_entry("dev_snmp6", net->proc_net); 301 remove_proc_entry("snmp6", net->proc_net); 302 } 303 304 static struct pernet_operations ipv6_proc_ops = { 305 .init = ipv6_proc_init_net, 306 .exit = ipv6_proc_exit_net, 307 }; 308 309 int __init ipv6_misc_proc_init(void) 310 { 311 return register_pernet_subsys(&ipv6_proc_ops); 312 } 313 314 void ipv6_misc_proc_exit(void) 315 { 316 unregister_pernet_subsys(&ipv6_proc_ops); 317 } 318