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_ITEM("Udp6MemErrors", UDP_MIB_MEMERRORS), 130 SNMP_MIB_SENTINEL 131 }; 132 133 static const struct snmp_mib snmp6_udplite6_list[] = { 134 SNMP_MIB_ITEM("UdpLite6InDatagrams", UDP_MIB_INDATAGRAMS), 135 SNMP_MIB_ITEM("UdpLite6NoPorts", UDP_MIB_NOPORTS), 136 SNMP_MIB_ITEM("UdpLite6InErrors", UDP_MIB_INERRORS), 137 SNMP_MIB_ITEM("UdpLite6OutDatagrams", UDP_MIB_OUTDATAGRAMS), 138 SNMP_MIB_ITEM("UdpLite6RcvbufErrors", UDP_MIB_RCVBUFERRORS), 139 SNMP_MIB_ITEM("UdpLite6SndbufErrors", UDP_MIB_SNDBUFERRORS), 140 SNMP_MIB_ITEM("UdpLite6InCsumErrors", UDP_MIB_CSUMERRORS), 141 SNMP_MIB_ITEM("UdpLite6MemErrors", UDP_MIB_MEMERRORS), 142 SNMP_MIB_SENTINEL 143 }; 144 145 static void snmp6_seq_show_icmpv6msg(struct seq_file *seq, atomic_long_t *smib) 146 { 147 char name[32]; 148 int i; 149 150 /* print by name -- deprecated items */ 151 for (i = 0; i < ICMP6MSG_MIB_MAX; i++) { 152 int icmptype; 153 const char *p; 154 155 icmptype = i & 0xff; 156 p = icmp6type2name[icmptype]; 157 if (!p) /* don't print un-named types here */ 158 continue; 159 snprintf(name, sizeof(name), "Icmp6%s%s", 160 i & 0x100 ? "Out" : "In", p); 161 seq_printf(seq, "%-32s\t%lu\n", name, 162 atomic_long_read(smib + i)); 163 } 164 165 /* print by number (nonzero only) - ICMPMsgStat format */ 166 for (i = 0; i < ICMP6MSG_MIB_MAX; i++) { 167 unsigned long val; 168 169 val = atomic_long_read(smib + i); 170 if (!val) 171 continue; 172 snprintf(name, sizeof(name), "Icmp6%sType%u", 173 i & 0x100 ? "Out" : "In", i & 0xff); 174 seq_printf(seq, "%-32s\t%lu\n", name, val); 175 } 176 } 177 178 /* can be called either with percpu mib (pcpumib != NULL), 179 * or shared one (smib != NULL) 180 */ 181 static void snmp6_seq_show_item(struct seq_file *seq, void __percpu *pcpumib, 182 atomic_long_t *smib, 183 const struct snmp_mib *itemlist) 184 { 185 unsigned long buff[SNMP_MIB_MAX]; 186 int i; 187 188 if (pcpumib) { 189 memset(buff, 0, sizeof(unsigned long) * SNMP_MIB_MAX); 190 191 snmp_get_cpu_field_batch(buff, itemlist, pcpumib); 192 for (i = 0; itemlist[i].name; i++) 193 seq_printf(seq, "%-32s\t%lu\n", 194 itemlist[i].name, buff[i]); 195 } else { 196 for (i = 0; itemlist[i].name; 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, size_t syncpoff) 204 { 205 u64 buff64[SNMP_MIB_MAX]; 206 int i; 207 208 memset(buff64, 0, sizeof(u64) * SNMP_MIB_MAX); 209 210 snmp_get_cpu_field64_batch(buff64, itemlist, mib, syncpoff); 211 for (i = 0; itemlist[i].name; i++) 212 seq_printf(seq, "%-32s\t%llu\n", itemlist[i].name, buff64[i]); 213 } 214 215 static int snmp6_seq_show(struct seq_file *seq, void *v) 216 { 217 struct net *net = (struct net *)seq->private; 218 219 snmp6_seq_show_item64(seq, net->mib.ipv6_statistics, 220 snmp6_ipstats_list, offsetof(struct ipstats_mib, syncp)); 221 snmp6_seq_show_item(seq, net->mib.icmpv6_statistics, 222 NULL, snmp6_icmp6_list); 223 snmp6_seq_show_icmpv6msg(seq, net->mib.icmpv6msg_statistics->mibs); 224 snmp6_seq_show_item(seq, net->mib.udp_stats_in6, 225 NULL, snmp6_udp6_list); 226 snmp6_seq_show_item(seq, net->mib.udplite_stats_in6, 227 NULL, snmp6_udplite6_list); 228 return 0; 229 } 230 231 static int snmp6_dev_seq_show(struct seq_file *seq, void *v) 232 { 233 struct inet6_dev *idev = (struct inet6_dev *)seq->private; 234 235 seq_printf(seq, "%-32s\t%u\n", "ifIndex", idev->dev->ifindex); 236 snmp6_seq_show_item64(seq, idev->stats.ipv6, 237 snmp6_ipstats_list, offsetof(struct ipstats_mib, syncp)); 238 snmp6_seq_show_item(seq, NULL, idev->stats.icmpv6dev->mibs, 239 snmp6_icmp6_list); 240 snmp6_seq_show_icmpv6msg(seq, idev->stats.icmpv6msgdev->mibs); 241 return 0; 242 } 243 244 int snmp6_register_dev(struct inet6_dev *idev) 245 { 246 struct proc_dir_entry *p; 247 struct net *net; 248 249 if (!idev || !idev->dev) 250 return -EINVAL; 251 252 net = dev_net(idev->dev); 253 if (!net->mib.proc_net_devsnmp6) 254 return -ENOENT; 255 256 p = proc_create_single_data(idev->dev->name, 0444, 257 net->mib.proc_net_devsnmp6, snmp6_dev_seq_show, idev); 258 if (!p) 259 return -ENOMEM; 260 261 idev->stats.proc_dir_entry = p; 262 return 0; 263 } 264 265 int snmp6_unregister_dev(struct inet6_dev *idev) 266 { 267 struct net *net = dev_net(idev->dev); 268 if (!net->mib.proc_net_devsnmp6) 269 return -ENOENT; 270 if (!idev->stats.proc_dir_entry) 271 return -EINVAL; 272 proc_remove(idev->stats.proc_dir_entry); 273 idev->stats.proc_dir_entry = NULL; 274 return 0; 275 } 276 277 static int __net_init ipv6_proc_init_net(struct net *net) 278 { 279 if (!proc_create_net_single("sockstat6", 0444, net->proc_net, 280 sockstat6_seq_show, NULL)) 281 return -ENOMEM; 282 283 if (!proc_create_net_single("snmp6", 0444, net->proc_net, 284 snmp6_seq_show, NULL)) 285 goto proc_snmp6_fail; 286 287 net->mib.proc_net_devsnmp6 = proc_mkdir("dev_snmp6", net->proc_net); 288 if (!net->mib.proc_net_devsnmp6) 289 goto proc_dev_snmp6_fail; 290 return 0; 291 292 proc_dev_snmp6_fail: 293 remove_proc_entry("snmp6", net->proc_net); 294 proc_snmp6_fail: 295 remove_proc_entry("sockstat6", net->proc_net); 296 return -ENOMEM; 297 } 298 299 static void __net_exit ipv6_proc_exit_net(struct net *net) 300 { 301 remove_proc_entry("sockstat6", net->proc_net); 302 remove_proc_entry("dev_snmp6", net->proc_net); 303 remove_proc_entry("snmp6", net->proc_net); 304 } 305 306 static struct pernet_operations ipv6_proc_ops = { 307 .init = ipv6_proc_init_net, 308 .exit = ipv6_proc_exit_net, 309 }; 310 311 int __init ipv6_misc_proc_init(void) 312 { 313 return register_pernet_subsys(&ipv6_proc_ops); 314 } 315 316 void ipv6_misc_proc_exit(void) 317 { 318 unregister_pernet_subsys(&ipv6_proc_ops); 319 } 320