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, "RAW6: inuse %d\n", 43 sock_prot_inuse_get(net, &rawv6_prot)); 44 seq_printf(seq, "FRAG6: inuse %u memory %lu\n", 45 atomic_read(&net->ipv6.fqdir->rhashtable.nelems), 46 frag_mem_limit(net->ipv6.fqdir)); 47 return 0; 48 } 49 50 static const struct snmp_mib snmp6_ipstats_list[] = { 51 /* ipv6 mib according to RFC 2465 */ 52 SNMP_MIB_ITEM("Ip6InReceives", IPSTATS_MIB_INPKTS), 53 SNMP_MIB_ITEM("Ip6InHdrErrors", IPSTATS_MIB_INHDRERRORS), 54 SNMP_MIB_ITEM("Ip6InTooBigErrors", IPSTATS_MIB_INTOOBIGERRORS), 55 SNMP_MIB_ITEM("Ip6InNoRoutes", IPSTATS_MIB_INNOROUTES), 56 SNMP_MIB_ITEM("Ip6InAddrErrors", IPSTATS_MIB_INADDRERRORS), 57 SNMP_MIB_ITEM("Ip6InUnknownProtos", IPSTATS_MIB_INUNKNOWNPROTOS), 58 SNMP_MIB_ITEM("Ip6InTruncatedPkts", IPSTATS_MIB_INTRUNCATEDPKTS), 59 SNMP_MIB_ITEM("Ip6InDiscards", IPSTATS_MIB_INDISCARDS), 60 SNMP_MIB_ITEM("Ip6InDelivers", IPSTATS_MIB_INDELIVERS), 61 SNMP_MIB_ITEM("Ip6OutForwDatagrams", IPSTATS_MIB_OUTFORWDATAGRAMS), 62 SNMP_MIB_ITEM("Ip6OutRequests", IPSTATS_MIB_OUTREQUESTS), 63 SNMP_MIB_ITEM("Ip6OutDiscards", IPSTATS_MIB_OUTDISCARDS), 64 SNMP_MIB_ITEM("Ip6OutNoRoutes", IPSTATS_MIB_OUTNOROUTES), 65 SNMP_MIB_ITEM("Ip6ReasmTimeout", IPSTATS_MIB_REASMTIMEOUT), 66 SNMP_MIB_ITEM("Ip6ReasmReqds", IPSTATS_MIB_REASMREQDS), 67 SNMP_MIB_ITEM("Ip6ReasmOKs", IPSTATS_MIB_REASMOKS), 68 SNMP_MIB_ITEM("Ip6ReasmFails", IPSTATS_MIB_REASMFAILS), 69 SNMP_MIB_ITEM("Ip6FragOKs", IPSTATS_MIB_FRAGOKS), 70 SNMP_MIB_ITEM("Ip6FragFails", IPSTATS_MIB_FRAGFAILS), 71 SNMP_MIB_ITEM("Ip6FragCreates", IPSTATS_MIB_FRAGCREATES), 72 SNMP_MIB_ITEM("Ip6InMcastPkts", IPSTATS_MIB_INMCASTPKTS), 73 SNMP_MIB_ITEM("Ip6OutMcastPkts", IPSTATS_MIB_OUTMCASTPKTS), 74 SNMP_MIB_ITEM("Ip6InOctets", IPSTATS_MIB_INOCTETS), 75 SNMP_MIB_ITEM("Ip6OutOctets", IPSTATS_MIB_OUTOCTETS), 76 SNMP_MIB_ITEM("Ip6InMcastOctets", IPSTATS_MIB_INMCASTOCTETS), 77 SNMP_MIB_ITEM("Ip6OutMcastOctets", IPSTATS_MIB_OUTMCASTOCTETS), 78 SNMP_MIB_ITEM("Ip6InBcastOctets", IPSTATS_MIB_INBCASTOCTETS), 79 SNMP_MIB_ITEM("Ip6OutBcastOctets", IPSTATS_MIB_OUTBCASTOCTETS), 80 /* IPSTATS_MIB_CSUMERRORS is not relevant in IPv6 (no checksum) */ 81 SNMP_MIB_ITEM("Ip6InNoECTPkts", IPSTATS_MIB_NOECTPKTS), 82 SNMP_MIB_ITEM("Ip6InECT1Pkts", IPSTATS_MIB_ECT1PKTS), 83 SNMP_MIB_ITEM("Ip6InECT0Pkts", IPSTATS_MIB_ECT0PKTS), 84 SNMP_MIB_ITEM("Ip6InCEPkts", IPSTATS_MIB_CEPKTS), 85 SNMP_MIB_ITEM("Ip6OutTransmits", IPSTATS_MIB_OUTPKTS), 86 }; 87 88 static const struct snmp_mib snmp6_icmp6_list[] = { 89 /* icmpv6 mib according to RFC 2466 */ 90 SNMP_MIB_ITEM("Icmp6InMsgs", ICMP6_MIB_INMSGS), 91 SNMP_MIB_ITEM("Icmp6InErrors", ICMP6_MIB_INERRORS), 92 SNMP_MIB_ITEM("Icmp6OutMsgs", ICMP6_MIB_OUTMSGS), 93 SNMP_MIB_ITEM("Icmp6OutErrors", ICMP6_MIB_OUTERRORS), 94 SNMP_MIB_ITEM("Icmp6InCsumErrors", ICMP6_MIB_CSUMERRORS), 95 /* ICMP6_MIB_RATELIMITHOST needs to be last, see snmp6_dev_seq_show(). */ 96 SNMP_MIB_ITEM("Icmp6OutRateLimitHost", ICMP6_MIB_RATELIMITHOST), 97 }; 98 99 static const struct snmp_mib snmp6_udp6_list[] = { 100 SNMP_MIB_ITEM("Udp6InDatagrams", UDP_MIB_INDATAGRAMS), 101 SNMP_MIB_ITEM("Udp6NoPorts", UDP_MIB_NOPORTS), 102 SNMP_MIB_ITEM("Udp6InErrors", UDP_MIB_INERRORS), 103 SNMP_MIB_ITEM("Udp6OutDatagrams", UDP_MIB_OUTDATAGRAMS), 104 SNMP_MIB_ITEM("Udp6RcvbufErrors", UDP_MIB_RCVBUFERRORS), 105 SNMP_MIB_ITEM("Udp6SndbufErrors", UDP_MIB_SNDBUFERRORS), 106 SNMP_MIB_ITEM("Udp6InCsumErrors", UDP_MIB_CSUMERRORS), 107 SNMP_MIB_ITEM("Udp6IgnoredMulti", UDP_MIB_IGNOREDMULTI), 108 SNMP_MIB_ITEM("Udp6MemErrors", UDP_MIB_MEMERRORS), 109 }; 110 111 static void snmp6_seq_show_icmpv6msg(struct seq_file *seq, atomic_long_t *smib) 112 { 113 char name[32]; 114 int i; 115 116 /* print by name -- deprecated items */ 117 for (i = 0; i < ICMP6MSG_MIB_MAX; i++) { 118 const char *p = NULL; 119 int icmptype; 120 121 #define CASE(TYP, STR) case TYP: p = STR; break; 122 123 icmptype = i & 0xff; 124 switch (icmptype) { 125 /* RFC 4293 v6 ICMPMsgStatsTable; named items for RFC 2466 compatibility */ 126 CASE(ICMPV6_DEST_UNREACH, "DestUnreachs") 127 CASE(ICMPV6_PKT_TOOBIG, "PktTooBigs") 128 CASE(ICMPV6_TIME_EXCEED, "TimeExcds") 129 CASE(ICMPV6_PARAMPROB, "ParmProblems") 130 CASE(ICMPV6_ECHO_REQUEST, "Echos") 131 CASE(ICMPV6_ECHO_REPLY, "EchoReplies") 132 CASE(ICMPV6_MGM_QUERY, "GroupMembQueries") 133 CASE(ICMPV6_MGM_REPORT, "GroupMembResponses") 134 CASE(ICMPV6_MGM_REDUCTION, "GroupMembReductions") 135 CASE(ICMPV6_MLD2_REPORT, "MLDv2Reports") 136 CASE(NDISC_ROUTER_ADVERTISEMENT, "RouterAdvertisements") 137 CASE(NDISC_ROUTER_SOLICITATION, "RouterSolicits") 138 CASE(NDISC_NEIGHBOUR_ADVERTISEMENT, "NeighborAdvertisements") 139 CASE(NDISC_NEIGHBOUR_SOLICITATION, "NeighborSolicits") 140 CASE(NDISC_REDIRECT, "Redirects") 141 } 142 #undef CASE 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 } 150 151 /* print by number (nonzero only) - ICMPMsgStat format */ 152 for (i = 0; i < ICMP6MSG_MIB_MAX; i++) { 153 unsigned long val; 154 155 val = atomic_long_read(smib + i); 156 if (!val) 157 continue; 158 snprintf(name, sizeof(name), "Icmp6%sType%u", 159 i & 0x100 ? "Out" : "In", i & 0xff); 160 seq_printf(seq, "%-32s\t%lu\n", name, val); 161 } 162 } 163 164 /* can be called either with percpu mib (pcpumib != NULL), 165 * or shared one (smib != NULL) 166 */ 167 static void snmp6_seq_show_item(struct seq_file *seq, void __percpu *pcpumib, 168 atomic_long_t *smib, 169 const struct snmp_mib *itemlist, 170 int cnt) 171 { 172 unsigned long buff[SNMP_MIB_MAX]; 173 int i; 174 175 if (pcpumib) { 176 memset(buff, 0, sizeof(unsigned long) * cnt); 177 178 snmp_get_cpu_field_batch_cnt(buff, itemlist, cnt, pcpumib); 179 for (i = 0; i < cnt; i++) 180 seq_printf(seq, "%-32s\t%lu\n", 181 itemlist[i].name, buff[i]); 182 } else { 183 for (i = 0; i < cnt; i++) 184 seq_printf(seq, "%-32s\t%lu\n", itemlist[i].name, 185 atomic_long_read(smib + itemlist[i].entry)); 186 } 187 } 188 189 static void snmp6_seq_show_item64(struct seq_file *seq, void __percpu *mib, 190 const struct snmp_mib *itemlist, 191 int cnt, size_t syncpoff) 192 { 193 u64 buff64[SNMP_MIB_MAX]; 194 int i; 195 196 memset(buff64, 0, sizeof(u64) * cnt); 197 198 snmp_get_cpu_field64_batch_cnt(buff64, itemlist, cnt, mib, syncpoff); 199 for (i = 0; i < cnt; i++) 200 seq_printf(seq, "%-32s\t%llu\n", itemlist[i].name, buff64[i]); 201 } 202 203 static int snmp6_seq_show(struct seq_file *seq, void *v) 204 { 205 struct net *net = (struct net *)seq->private; 206 207 snmp6_seq_show_item64(seq, net->mib.ipv6_statistics, 208 snmp6_ipstats_list, 209 ARRAY_SIZE(snmp6_ipstats_list), 210 offsetof(struct ipstats_mib, syncp)); 211 snmp6_seq_show_item(seq, net->mib.icmpv6_statistics, 212 NULL, snmp6_icmp6_list, 213 ARRAY_SIZE(snmp6_icmp6_list)); 214 snmp6_seq_show_icmpv6msg(seq, net->mib.icmpv6msg_statistics->mibs); 215 snmp6_seq_show_item(seq, net->mib.udp_stats_in6, 216 NULL, snmp6_udp6_list, 217 ARRAY_SIZE(snmp6_udp6_list)); 218 return 0; 219 } 220 221 static int snmp6_dev_seq_show(struct seq_file *seq, void *v) 222 { 223 struct inet6_dev *idev = (struct inet6_dev *)seq->private; 224 225 seq_printf(seq, "%-32s\t%u\n", "ifIndex", idev->dev->ifindex); 226 snmp6_seq_show_item64(seq, idev->stats.ipv6, 227 snmp6_ipstats_list, 228 ARRAY_SIZE(snmp6_ipstats_list), 229 offsetof(struct ipstats_mib, syncp)); 230 231 /* Per idev icmp stats do not have ICMP6_MIB_RATELIMITHOST */ 232 snmp6_seq_show_item(seq, NULL, idev->stats.icmpv6dev->mibs, 233 snmp6_icmp6_list, ARRAY_SIZE(snmp6_icmp6_list) - 1); 234 235 snmp6_seq_show_icmpv6msg(seq, idev->stats.icmpv6msgdev->mibs); 236 return 0; 237 } 238 239 int snmp6_register_dev(struct inet6_dev *idev) 240 { 241 struct proc_dir_entry *p; 242 struct net *net; 243 244 if (!idev || !idev->dev) 245 return -EINVAL; 246 247 net = dev_net(idev->dev); 248 if (!net->mib.proc_net_devsnmp6) 249 return -ENOENT; 250 251 p = proc_create_single_data(idev->dev->name, 0444, 252 net->mib.proc_net_devsnmp6, snmp6_dev_seq_show, idev); 253 if (!p) 254 return -ENOMEM; 255 256 idev->stats.proc_dir_entry = p; 257 return 0; 258 } 259 260 int snmp6_unregister_dev(struct inet6_dev *idev) 261 { 262 struct net *net = dev_net(idev->dev); 263 if (!net->mib.proc_net_devsnmp6) 264 return -ENOENT; 265 if (!idev->stats.proc_dir_entry) 266 return -EINVAL; 267 proc_remove(idev->stats.proc_dir_entry); 268 idev->stats.proc_dir_entry = NULL; 269 return 0; 270 } 271 272 static int __net_init ipv6_proc_init_net(struct net *net) 273 { 274 if (!proc_create_net_single("sockstat6", 0444, net->proc_net, 275 sockstat6_seq_show, NULL)) 276 return -ENOMEM; 277 278 if (!proc_create_net_single("snmp6", 0444, net->proc_net, 279 snmp6_seq_show, NULL)) 280 goto proc_snmp6_fail; 281 282 net->mib.proc_net_devsnmp6 = proc_mkdir("dev_snmp6", net->proc_net); 283 if (!net->mib.proc_net_devsnmp6) 284 goto proc_dev_snmp6_fail; 285 return 0; 286 287 proc_dev_snmp6_fail: 288 remove_proc_entry("snmp6", net->proc_net); 289 proc_snmp6_fail: 290 remove_proc_entry("sockstat6", net->proc_net); 291 return -ENOMEM; 292 } 293 294 static void __net_exit ipv6_proc_exit_net(struct net *net) 295 { 296 remove_proc_entry("sockstat6", net->proc_net); 297 remove_proc_entry("dev_snmp6", net->proc_net); 298 remove_proc_entry("snmp6", net->proc_net); 299 } 300 301 static struct pernet_operations ipv6_proc_ops = { 302 .init = ipv6_proc_init_net, 303 .exit = ipv6_proc_exit_net, 304 }; 305 306 int __init ipv6_misc_proc_init(void) 307 { 308 return register_pernet_subsys(&ipv6_proc_ops); 309 } 310 311 void ipv6_misc_proc_exit(void) 312 { 313 unregister_pernet_subsys(&ipv6_proc_ops); 314 } 315