1 /* 2 * INET An implementation of the TCP/IP protocol suite for the LINUX 3 * operating system. INET is implemented using the BSD Socket 4 * interface as the means of communication with the user level. 5 * 6 * This file implements the various access functions for the 7 * PROC file system. This is very similar to the IPv4 version, 8 * except it reports the sockets in the INET6 address family. 9 * 10 * Authors: David S. Miller (davem@caip.rutgers.edu) 11 * YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org> 12 * 13 * This program is free software; you can redistribute it and/or 14 * modify it under the terms of the GNU General Public License 15 * as published by the Free Software Foundation; either version 16 * 2 of the License, or (at your option) any later version. 17 */ 18 #include <linux/socket.h> 19 #include <linux/net.h> 20 #include <linux/ipv6.h> 21 #include <linux/proc_fs.h> 22 #include <linux/seq_file.h> 23 #include <linux/stddef.h> 24 #include <linux/export.h> 25 #include <net/net_namespace.h> 26 #include <net/ip.h> 27 #include <net/sock.h> 28 #include <net/tcp.h> 29 #include <net/udp.h> 30 #include <net/transp_v6.h> 31 #include <net/ipv6.h> 32 33 #define MAX4(a, b, c, d) \ 34 max_t(u32, max_t(u32, a, b), max_t(u32, c, d)) 35 #define SNMP_MIB_MAX MAX4(UDP_MIB_MAX, TCP_MIB_MAX, \ 36 IPSTATS_MIB_MAX, ICMP_MIB_MAX) 37 38 static int sockstat6_seq_show(struct seq_file *seq, void *v) 39 { 40 struct net *net = seq->private; 41 unsigned int frag_mem = ip6_frag_mem(net); 42 43 seq_printf(seq, "TCP6: inuse %d\n", 44 sock_prot_inuse_get(net, &tcpv6_prot)); 45 seq_printf(seq, "UDP6: inuse %d\n", 46 sock_prot_inuse_get(net, &udpv6_prot)); 47 seq_printf(seq, "UDPLITE6: inuse %d\n", 48 sock_prot_inuse_get(net, &udplitev6_prot)); 49 seq_printf(seq, "RAW6: inuse %d\n", 50 sock_prot_inuse_get(net, &rawv6_prot)); 51 seq_printf(seq, "FRAG6: inuse %u memory %u\n", !!frag_mem, frag_mem); 52 return 0; 53 } 54 55 static int sockstat6_seq_open(struct inode *inode, struct file *file) 56 { 57 return single_open_net(inode, file, sockstat6_seq_show); 58 } 59 60 static const struct file_operations sockstat6_seq_fops = { 61 .open = sockstat6_seq_open, 62 .read = seq_read, 63 .llseek = seq_lseek, 64 .release = single_release_net, 65 }; 66 67 static const struct snmp_mib snmp6_ipstats_list[] = { 68 /* ipv6 mib according to RFC 2465 */ 69 SNMP_MIB_ITEM("Ip6InReceives", IPSTATS_MIB_INPKTS), 70 SNMP_MIB_ITEM("Ip6InHdrErrors", IPSTATS_MIB_INHDRERRORS), 71 SNMP_MIB_ITEM("Ip6InTooBigErrors", IPSTATS_MIB_INTOOBIGERRORS), 72 SNMP_MIB_ITEM("Ip6InNoRoutes", IPSTATS_MIB_INNOROUTES), 73 SNMP_MIB_ITEM("Ip6InAddrErrors", IPSTATS_MIB_INADDRERRORS), 74 SNMP_MIB_ITEM("Ip6InUnknownProtos", IPSTATS_MIB_INUNKNOWNPROTOS), 75 SNMP_MIB_ITEM("Ip6InTruncatedPkts", IPSTATS_MIB_INTRUNCATEDPKTS), 76 SNMP_MIB_ITEM("Ip6InDiscards", IPSTATS_MIB_INDISCARDS), 77 SNMP_MIB_ITEM("Ip6InDelivers", IPSTATS_MIB_INDELIVERS), 78 SNMP_MIB_ITEM("Ip6OutForwDatagrams", IPSTATS_MIB_OUTFORWDATAGRAMS), 79 SNMP_MIB_ITEM("Ip6OutRequests", IPSTATS_MIB_OUTPKTS), 80 SNMP_MIB_ITEM("Ip6OutDiscards", IPSTATS_MIB_OUTDISCARDS), 81 SNMP_MIB_ITEM("Ip6OutNoRoutes", IPSTATS_MIB_OUTNOROUTES), 82 SNMP_MIB_ITEM("Ip6ReasmTimeout", IPSTATS_MIB_REASMTIMEOUT), 83 SNMP_MIB_ITEM("Ip6ReasmReqds", IPSTATS_MIB_REASMREQDS), 84 SNMP_MIB_ITEM("Ip6ReasmOKs", IPSTATS_MIB_REASMOKS), 85 SNMP_MIB_ITEM("Ip6ReasmFails", IPSTATS_MIB_REASMFAILS), 86 SNMP_MIB_ITEM("Ip6FragOKs", IPSTATS_MIB_FRAGOKS), 87 SNMP_MIB_ITEM("Ip6FragFails", IPSTATS_MIB_FRAGFAILS), 88 SNMP_MIB_ITEM("Ip6FragCreates", IPSTATS_MIB_FRAGCREATES), 89 SNMP_MIB_ITEM("Ip6InMcastPkts", IPSTATS_MIB_INMCASTPKTS), 90 SNMP_MIB_ITEM("Ip6OutMcastPkts", IPSTATS_MIB_OUTMCASTPKTS), 91 SNMP_MIB_ITEM("Ip6InOctets", IPSTATS_MIB_INOCTETS), 92 SNMP_MIB_ITEM("Ip6OutOctets", IPSTATS_MIB_OUTOCTETS), 93 SNMP_MIB_ITEM("Ip6InMcastOctets", IPSTATS_MIB_INMCASTOCTETS), 94 SNMP_MIB_ITEM("Ip6OutMcastOctets", IPSTATS_MIB_OUTMCASTOCTETS), 95 SNMP_MIB_ITEM("Ip6InBcastOctets", IPSTATS_MIB_INBCASTOCTETS), 96 SNMP_MIB_ITEM("Ip6OutBcastOctets", IPSTATS_MIB_OUTBCASTOCTETS), 97 /* IPSTATS_MIB_CSUMERRORS is not relevant in IPv6 (no checksum) */ 98 SNMP_MIB_ITEM("Ip6InNoECTPkts", IPSTATS_MIB_NOECTPKTS), 99 SNMP_MIB_ITEM("Ip6InECT1Pkts", IPSTATS_MIB_ECT1PKTS), 100 SNMP_MIB_ITEM("Ip6InECT0Pkts", IPSTATS_MIB_ECT0PKTS), 101 SNMP_MIB_ITEM("Ip6InCEPkts", IPSTATS_MIB_CEPKTS), 102 SNMP_MIB_SENTINEL 103 }; 104 105 static const struct snmp_mib snmp6_icmp6_list[] = { 106 /* icmpv6 mib according to RFC 2466 */ 107 SNMP_MIB_ITEM("Icmp6InMsgs", ICMP6_MIB_INMSGS), 108 SNMP_MIB_ITEM("Icmp6InErrors", ICMP6_MIB_INERRORS), 109 SNMP_MIB_ITEM("Icmp6OutMsgs", ICMP6_MIB_OUTMSGS), 110 SNMP_MIB_ITEM("Icmp6OutErrors", ICMP6_MIB_OUTERRORS), 111 SNMP_MIB_ITEM("Icmp6InCsumErrors", ICMP6_MIB_CSUMERRORS), 112 SNMP_MIB_SENTINEL 113 }; 114 115 /* RFC 4293 v6 ICMPMsgStatsTable; named items for RFC 2466 compatibility */ 116 static const char *const icmp6type2name[256] = { 117 [ICMPV6_DEST_UNREACH] = "DestUnreachs", 118 [ICMPV6_PKT_TOOBIG] = "PktTooBigs", 119 [ICMPV6_TIME_EXCEED] = "TimeExcds", 120 [ICMPV6_PARAMPROB] = "ParmProblems", 121 [ICMPV6_ECHO_REQUEST] = "Echos", 122 [ICMPV6_ECHO_REPLY] = "EchoReplies", 123 [ICMPV6_MGM_QUERY] = "GroupMembQueries", 124 [ICMPV6_MGM_REPORT] = "GroupMembResponses", 125 [ICMPV6_MGM_REDUCTION] = "GroupMembReductions", 126 [ICMPV6_MLD2_REPORT] = "MLDv2Reports", 127 [NDISC_ROUTER_ADVERTISEMENT] = "RouterAdvertisements", 128 [NDISC_ROUTER_SOLICITATION] = "RouterSolicits", 129 [NDISC_NEIGHBOUR_ADVERTISEMENT] = "NeighborAdvertisements", 130 [NDISC_NEIGHBOUR_SOLICITATION] = "NeighborSolicits", 131 [NDISC_REDIRECT] = "Redirects", 132 }; 133 134 135 static const struct snmp_mib snmp6_udp6_list[] = { 136 SNMP_MIB_ITEM("Udp6InDatagrams", UDP_MIB_INDATAGRAMS), 137 SNMP_MIB_ITEM("Udp6NoPorts", UDP_MIB_NOPORTS), 138 SNMP_MIB_ITEM("Udp6InErrors", UDP_MIB_INERRORS), 139 SNMP_MIB_ITEM("Udp6OutDatagrams", UDP_MIB_OUTDATAGRAMS), 140 SNMP_MIB_ITEM("Udp6RcvbufErrors", UDP_MIB_RCVBUFERRORS), 141 SNMP_MIB_ITEM("Udp6SndbufErrors", UDP_MIB_SNDBUFERRORS), 142 SNMP_MIB_ITEM("Udp6InCsumErrors", UDP_MIB_CSUMERRORS), 143 SNMP_MIB_ITEM("Udp6IgnoredMulti", UDP_MIB_IGNOREDMULTI), 144 SNMP_MIB_SENTINEL 145 }; 146 147 static const struct snmp_mib snmp6_udplite6_list[] = { 148 SNMP_MIB_ITEM("UdpLite6InDatagrams", UDP_MIB_INDATAGRAMS), 149 SNMP_MIB_ITEM("UdpLite6NoPorts", UDP_MIB_NOPORTS), 150 SNMP_MIB_ITEM("UdpLite6InErrors", UDP_MIB_INERRORS), 151 SNMP_MIB_ITEM("UdpLite6OutDatagrams", UDP_MIB_OUTDATAGRAMS), 152 SNMP_MIB_ITEM("UdpLite6RcvbufErrors", UDP_MIB_RCVBUFERRORS), 153 SNMP_MIB_ITEM("UdpLite6SndbufErrors", UDP_MIB_SNDBUFERRORS), 154 SNMP_MIB_ITEM("UdpLite6InCsumErrors", UDP_MIB_CSUMERRORS), 155 SNMP_MIB_SENTINEL 156 }; 157 158 static void snmp6_seq_show_icmpv6msg(struct seq_file *seq, atomic_long_t *smib) 159 { 160 char name[32]; 161 int i; 162 163 /* print by name -- deprecated items */ 164 for (i = 0; i < ICMP6MSG_MIB_MAX; i++) { 165 int icmptype; 166 const char *p; 167 168 icmptype = i & 0xff; 169 p = icmp6type2name[icmptype]; 170 if (!p) /* don't print un-named types here */ 171 continue; 172 snprintf(name, sizeof(name), "Icmp6%s%s", 173 i & 0x100 ? "Out" : "In", p); 174 seq_printf(seq, "%-32s\t%lu\n", name, 175 atomic_long_read(smib + i)); 176 } 177 178 /* print by number (nonzero only) - ICMPMsgStat format */ 179 for (i = 0; i < ICMP6MSG_MIB_MAX; i++) { 180 unsigned long val; 181 182 val = atomic_long_read(smib + i); 183 if (!val) 184 continue; 185 snprintf(name, sizeof(name), "Icmp6%sType%u", 186 i & 0x100 ? "Out" : "In", i & 0xff); 187 seq_printf(seq, "%-32s\t%lu\n", name, val); 188 } 189 } 190 191 /* can be called either with percpu mib (pcpumib != NULL), 192 * or shared one (smib != NULL) 193 */ 194 static void snmp6_seq_show_item(struct seq_file *seq, void __percpu *pcpumib, 195 atomic_long_t *smib, 196 const struct snmp_mib *itemlist) 197 { 198 unsigned long buff[SNMP_MIB_MAX]; 199 int i; 200 201 if (pcpumib) { 202 memset(buff, 0, sizeof(unsigned long) * SNMP_MIB_MAX); 203 204 snmp_get_cpu_field_batch(buff, itemlist, pcpumib); 205 for (i = 0; itemlist[i].name; i++) 206 seq_printf(seq, "%-32s\t%lu\n", 207 itemlist[i].name, buff[i]); 208 } else { 209 for (i = 0; itemlist[i].name; i++) 210 seq_printf(seq, "%-32s\t%lu\n", itemlist[i].name, 211 atomic_long_read(smib + itemlist[i].entry)); 212 } 213 } 214 215 static void snmp6_seq_show_item64(struct seq_file *seq, void __percpu *mib, 216 const struct snmp_mib *itemlist, size_t syncpoff) 217 { 218 u64 buff64[SNMP_MIB_MAX]; 219 int i; 220 221 memset(buff64, 0, sizeof(u64) * SNMP_MIB_MAX); 222 223 snmp_get_cpu_field64_batch(buff64, itemlist, mib, syncpoff); 224 for (i = 0; itemlist[i].name; i++) 225 seq_printf(seq, "%-32s\t%llu\n", itemlist[i].name, buff64[i]); 226 } 227 228 static int snmp6_seq_show(struct seq_file *seq, void *v) 229 { 230 struct net *net = (struct net *)seq->private; 231 232 snmp6_seq_show_item64(seq, net->mib.ipv6_statistics, 233 snmp6_ipstats_list, offsetof(struct ipstats_mib, syncp)); 234 snmp6_seq_show_item(seq, net->mib.icmpv6_statistics, 235 NULL, snmp6_icmp6_list); 236 snmp6_seq_show_icmpv6msg(seq, net->mib.icmpv6msg_statistics->mibs); 237 snmp6_seq_show_item(seq, net->mib.udp_stats_in6, 238 NULL, snmp6_udp6_list); 239 snmp6_seq_show_item(seq, net->mib.udplite_stats_in6, 240 NULL, snmp6_udplite6_list); 241 return 0; 242 } 243 244 static int snmp6_seq_open(struct inode *inode, struct file *file) 245 { 246 return single_open_net(inode, file, snmp6_seq_show); 247 } 248 249 static const struct file_operations snmp6_seq_fops = { 250 .open = snmp6_seq_open, 251 .read = seq_read, 252 .llseek = seq_lseek, 253 .release = single_release_net, 254 }; 255 256 static int snmp6_dev_seq_show(struct seq_file *seq, void *v) 257 { 258 struct inet6_dev *idev = (struct inet6_dev *)seq->private; 259 260 seq_printf(seq, "%-32s\t%u\n", "ifIndex", idev->dev->ifindex); 261 snmp6_seq_show_item64(seq, idev->stats.ipv6, 262 snmp6_ipstats_list, offsetof(struct ipstats_mib, syncp)); 263 snmp6_seq_show_item(seq, NULL, idev->stats.icmpv6dev->mibs, 264 snmp6_icmp6_list); 265 snmp6_seq_show_icmpv6msg(seq, idev->stats.icmpv6msgdev->mibs); 266 return 0; 267 } 268 269 static int snmp6_dev_seq_open(struct inode *inode, struct file *file) 270 { 271 return single_open(file, snmp6_dev_seq_show, PDE_DATA(inode)); 272 } 273 274 static const struct file_operations snmp6_dev_seq_fops = { 275 .open = snmp6_dev_seq_open, 276 .read = seq_read, 277 .llseek = seq_lseek, 278 .release = single_release, 279 }; 280 281 int snmp6_register_dev(struct inet6_dev *idev) 282 { 283 struct proc_dir_entry *p; 284 struct net *net; 285 286 if (!idev || !idev->dev) 287 return -EINVAL; 288 289 net = dev_net(idev->dev); 290 if (!net->mib.proc_net_devsnmp6) 291 return -ENOENT; 292 293 p = proc_create_data(idev->dev->name, S_IRUGO, 294 net->mib.proc_net_devsnmp6, 295 &snmp6_dev_seq_fops, idev); 296 if (!p) 297 return -ENOMEM; 298 299 idev->stats.proc_dir_entry = p; 300 return 0; 301 } 302 303 int snmp6_unregister_dev(struct inet6_dev *idev) 304 { 305 struct net *net = dev_net(idev->dev); 306 if (!net->mib.proc_net_devsnmp6) 307 return -ENOENT; 308 if (!idev->stats.proc_dir_entry) 309 return -EINVAL; 310 proc_remove(idev->stats.proc_dir_entry); 311 idev->stats.proc_dir_entry = NULL; 312 return 0; 313 } 314 315 static int __net_init ipv6_proc_init_net(struct net *net) 316 { 317 if (!proc_create("sockstat6", S_IRUGO, net->proc_net, 318 &sockstat6_seq_fops)) 319 return -ENOMEM; 320 321 if (!proc_create("snmp6", S_IRUGO, net->proc_net, &snmp6_seq_fops)) 322 goto proc_snmp6_fail; 323 324 net->mib.proc_net_devsnmp6 = proc_mkdir("dev_snmp6", net->proc_net); 325 if (!net->mib.proc_net_devsnmp6) 326 goto proc_dev_snmp6_fail; 327 return 0; 328 329 proc_dev_snmp6_fail: 330 remove_proc_entry("snmp6", net->proc_net); 331 proc_snmp6_fail: 332 remove_proc_entry("sockstat6", net->proc_net); 333 return -ENOMEM; 334 } 335 336 static void __net_exit ipv6_proc_exit_net(struct net *net) 337 { 338 remove_proc_entry("sockstat6", net->proc_net); 339 remove_proc_entry("dev_snmp6", net->proc_net); 340 remove_proc_entry("snmp6", net->proc_net); 341 } 342 343 static struct pernet_operations ipv6_proc_ops = { 344 .init = ipv6_proc_init_net, 345 .exit = ipv6_proc_exit_net, 346 .async = true, 347 }; 348 349 int __init ipv6_misc_proc_init(void) 350 { 351 return register_pernet_subsys(&ipv6_proc_ops); 352 } 353 354 void ipv6_misc_proc_exit(void) 355 { 356 unregister_pernet_subsys(&ipv6_proc_ops); 357 } 358 359