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 .owner = THIS_MODULE, 62 .open = sockstat6_seq_open, 63 .read = seq_read, 64 .llseek = seq_lseek, 65 .release = single_release_net, 66 }; 67 68 static const struct snmp_mib snmp6_ipstats_list[] = { 69 /* ipv6 mib according to RFC 2465 */ 70 SNMP_MIB_ITEM("Ip6InReceives", IPSTATS_MIB_INPKTS), 71 SNMP_MIB_ITEM("Ip6InHdrErrors", IPSTATS_MIB_INHDRERRORS), 72 SNMP_MIB_ITEM("Ip6InTooBigErrors", IPSTATS_MIB_INTOOBIGERRORS), 73 SNMP_MIB_ITEM("Ip6InNoRoutes", IPSTATS_MIB_INNOROUTES), 74 SNMP_MIB_ITEM("Ip6InAddrErrors", IPSTATS_MIB_INADDRERRORS), 75 SNMP_MIB_ITEM("Ip6InUnknownProtos", IPSTATS_MIB_INUNKNOWNPROTOS), 76 SNMP_MIB_ITEM("Ip6InTruncatedPkts", IPSTATS_MIB_INTRUNCATEDPKTS), 77 SNMP_MIB_ITEM("Ip6InDiscards", IPSTATS_MIB_INDISCARDS), 78 SNMP_MIB_ITEM("Ip6InDelivers", IPSTATS_MIB_INDELIVERS), 79 SNMP_MIB_ITEM("Ip6OutForwDatagrams", IPSTATS_MIB_OUTFORWDATAGRAMS), 80 SNMP_MIB_ITEM("Ip6OutRequests", IPSTATS_MIB_OUTPKTS), 81 SNMP_MIB_ITEM("Ip6OutDiscards", IPSTATS_MIB_OUTDISCARDS), 82 SNMP_MIB_ITEM("Ip6OutNoRoutes", IPSTATS_MIB_OUTNOROUTES), 83 SNMP_MIB_ITEM("Ip6ReasmTimeout", IPSTATS_MIB_REASMTIMEOUT), 84 SNMP_MIB_ITEM("Ip6ReasmReqds", IPSTATS_MIB_REASMREQDS), 85 SNMP_MIB_ITEM("Ip6ReasmOKs", IPSTATS_MIB_REASMOKS), 86 SNMP_MIB_ITEM("Ip6ReasmFails", IPSTATS_MIB_REASMFAILS), 87 SNMP_MIB_ITEM("Ip6FragOKs", IPSTATS_MIB_FRAGOKS), 88 SNMP_MIB_ITEM("Ip6FragFails", IPSTATS_MIB_FRAGFAILS), 89 SNMP_MIB_ITEM("Ip6FragCreates", IPSTATS_MIB_FRAGCREATES), 90 SNMP_MIB_ITEM("Ip6InMcastPkts", IPSTATS_MIB_INMCASTPKTS), 91 SNMP_MIB_ITEM("Ip6OutMcastPkts", IPSTATS_MIB_OUTMCASTPKTS), 92 SNMP_MIB_ITEM("Ip6InOctets", IPSTATS_MIB_INOCTETS), 93 SNMP_MIB_ITEM("Ip6OutOctets", IPSTATS_MIB_OUTOCTETS), 94 SNMP_MIB_ITEM("Ip6InMcastOctets", IPSTATS_MIB_INMCASTOCTETS), 95 SNMP_MIB_ITEM("Ip6OutMcastOctets", IPSTATS_MIB_OUTMCASTOCTETS), 96 SNMP_MIB_ITEM("Ip6InBcastOctets", IPSTATS_MIB_INBCASTOCTETS), 97 SNMP_MIB_ITEM("Ip6OutBcastOctets", IPSTATS_MIB_OUTBCASTOCTETS), 98 /* IPSTATS_MIB_CSUMERRORS is not relevant in IPv6 (no checksum) */ 99 SNMP_MIB_ITEM("Ip6InNoECTPkts", IPSTATS_MIB_NOECTPKTS), 100 SNMP_MIB_ITEM("Ip6InECT1Pkts", IPSTATS_MIB_ECT1PKTS), 101 SNMP_MIB_ITEM("Ip6InECT0Pkts", IPSTATS_MIB_ECT0PKTS), 102 SNMP_MIB_ITEM("Ip6InCEPkts", IPSTATS_MIB_CEPKTS), 103 SNMP_MIB_SENTINEL 104 }; 105 106 static const struct snmp_mib snmp6_icmp6_list[] = { 107 /* icmpv6 mib according to RFC 2466 */ 108 SNMP_MIB_ITEM("Icmp6InMsgs", ICMP6_MIB_INMSGS), 109 SNMP_MIB_ITEM("Icmp6InErrors", ICMP6_MIB_INERRORS), 110 SNMP_MIB_ITEM("Icmp6OutMsgs", ICMP6_MIB_OUTMSGS), 111 SNMP_MIB_ITEM("Icmp6OutErrors", ICMP6_MIB_OUTERRORS), 112 SNMP_MIB_ITEM("Icmp6InCsumErrors", ICMP6_MIB_CSUMERRORS), 113 SNMP_MIB_SENTINEL 114 }; 115 116 /* RFC 4293 v6 ICMPMsgStatsTable; named items for RFC 2466 compatibility */ 117 static const char *const icmp6type2name[256] = { 118 [ICMPV6_DEST_UNREACH] = "DestUnreachs", 119 [ICMPV6_PKT_TOOBIG] = "PktTooBigs", 120 [ICMPV6_TIME_EXCEED] = "TimeExcds", 121 [ICMPV6_PARAMPROB] = "ParmProblems", 122 [ICMPV6_ECHO_REQUEST] = "Echos", 123 [ICMPV6_ECHO_REPLY] = "EchoReplies", 124 [ICMPV6_MGM_QUERY] = "GroupMembQueries", 125 [ICMPV6_MGM_REPORT] = "GroupMembResponses", 126 [ICMPV6_MGM_REDUCTION] = "GroupMembReductions", 127 [ICMPV6_MLD2_REPORT] = "MLDv2Reports", 128 [NDISC_ROUTER_ADVERTISEMENT] = "RouterAdvertisements", 129 [NDISC_ROUTER_SOLICITATION] = "RouterSolicits", 130 [NDISC_NEIGHBOUR_ADVERTISEMENT] = "NeighborAdvertisements", 131 [NDISC_NEIGHBOUR_SOLICITATION] = "NeighborSolicits", 132 [NDISC_REDIRECT] = "Redirects", 133 }; 134 135 136 static const struct snmp_mib snmp6_udp6_list[] = { 137 SNMP_MIB_ITEM("Udp6InDatagrams", UDP_MIB_INDATAGRAMS), 138 SNMP_MIB_ITEM("Udp6NoPorts", UDP_MIB_NOPORTS), 139 SNMP_MIB_ITEM("Udp6InErrors", UDP_MIB_INERRORS), 140 SNMP_MIB_ITEM("Udp6OutDatagrams", UDP_MIB_OUTDATAGRAMS), 141 SNMP_MIB_ITEM("Udp6RcvbufErrors", UDP_MIB_RCVBUFERRORS), 142 SNMP_MIB_ITEM("Udp6SndbufErrors", UDP_MIB_SNDBUFERRORS), 143 SNMP_MIB_ITEM("Udp6InCsumErrors", UDP_MIB_CSUMERRORS), 144 SNMP_MIB_ITEM("Udp6IgnoredMulti", UDP_MIB_IGNOREDMULTI), 145 SNMP_MIB_SENTINEL 146 }; 147 148 static const struct snmp_mib snmp6_udplite6_list[] = { 149 SNMP_MIB_ITEM("UdpLite6InDatagrams", UDP_MIB_INDATAGRAMS), 150 SNMP_MIB_ITEM("UdpLite6NoPorts", UDP_MIB_NOPORTS), 151 SNMP_MIB_ITEM("UdpLite6InErrors", UDP_MIB_INERRORS), 152 SNMP_MIB_ITEM("UdpLite6OutDatagrams", UDP_MIB_OUTDATAGRAMS), 153 SNMP_MIB_ITEM("UdpLite6RcvbufErrors", UDP_MIB_RCVBUFERRORS), 154 SNMP_MIB_ITEM("UdpLite6SndbufErrors", UDP_MIB_SNDBUFERRORS), 155 SNMP_MIB_ITEM("UdpLite6InCsumErrors", UDP_MIB_CSUMERRORS), 156 SNMP_MIB_SENTINEL 157 }; 158 159 static void snmp6_seq_show_icmpv6msg(struct seq_file *seq, atomic_long_t *smib) 160 { 161 char name[32]; 162 int i; 163 164 /* print by name -- deprecated items */ 165 for (i = 0; i < ICMP6MSG_MIB_MAX; i++) { 166 int icmptype; 167 const char *p; 168 169 icmptype = i & 0xff; 170 p = icmp6type2name[icmptype]; 171 if (!p) /* don't print un-named types here */ 172 continue; 173 snprintf(name, sizeof(name), "Icmp6%s%s", 174 i & 0x100 ? "Out" : "In", p); 175 seq_printf(seq, "%-32s\t%lu\n", name, 176 atomic_long_read(smib + i)); 177 } 178 179 /* print by number (nonzero only) - ICMPMsgStat format */ 180 for (i = 0; i < ICMP6MSG_MIB_MAX; i++) { 181 unsigned long val; 182 183 val = atomic_long_read(smib + i); 184 if (!val) 185 continue; 186 snprintf(name, sizeof(name), "Icmp6%sType%u", 187 i & 0x100 ? "Out" : "In", i & 0xff); 188 seq_printf(seq, "%-32s\t%lu\n", name, val); 189 } 190 } 191 192 /* can be called either with percpu mib (pcpumib != NULL), 193 * or shared one (smib != NULL) 194 */ 195 static void snmp6_seq_show_item(struct seq_file *seq, void __percpu *pcpumib, 196 atomic_long_t *smib, 197 const struct snmp_mib *itemlist) 198 { 199 unsigned long buff[SNMP_MIB_MAX]; 200 int i; 201 202 if (pcpumib) { 203 memset(buff, 0, sizeof(unsigned long) * SNMP_MIB_MAX); 204 205 snmp_get_cpu_field_batch(buff, itemlist, pcpumib); 206 for (i = 0; itemlist[i].name; i++) 207 seq_printf(seq, "%-32s\t%lu\n", 208 itemlist[i].name, buff[i]); 209 } else { 210 for (i = 0; itemlist[i].name; i++) 211 seq_printf(seq, "%-32s\t%lu\n", itemlist[i].name, 212 atomic_long_read(smib + itemlist[i].entry)); 213 } 214 } 215 216 static void snmp6_seq_show_item64(struct seq_file *seq, void __percpu *mib, 217 const struct snmp_mib *itemlist, size_t syncpoff) 218 { 219 u64 buff64[SNMP_MIB_MAX]; 220 int i; 221 222 memset(buff64, 0, sizeof(u64) * SNMP_MIB_MAX); 223 224 snmp_get_cpu_field64_batch(buff64, itemlist, mib, syncpoff); 225 for (i = 0; itemlist[i].name; i++) 226 seq_printf(seq, "%-32s\t%llu\n", itemlist[i].name, buff64[i]); 227 } 228 229 static int snmp6_seq_show(struct seq_file *seq, void *v) 230 { 231 struct net *net = (struct net *)seq->private; 232 233 snmp6_seq_show_item64(seq, net->mib.ipv6_statistics, 234 snmp6_ipstats_list, offsetof(struct ipstats_mib, syncp)); 235 snmp6_seq_show_item(seq, net->mib.icmpv6_statistics, 236 NULL, snmp6_icmp6_list); 237 snmp6_seq_show_icmpv6msg(seq, net->mib.icmpv6msg_statistics->mibs); 238 snmp6_seq_show_item(seq, net->mib.udp_stats_in6, 239 NULL, snmp6_udp6_list); 240 snmp6_seq_show_item(seq, net->mib.udplite_stats_in6, 241 NULL, snmp6_udplite6_list); 242 return 0; 243 } 244 245 static int snmp6_seq_open(struct inode *inode, struct file *file) 246 { 247 return single_open_net(inode, file, snmp6_seq_show); 248 } 249 250 static const struct file_operations snmp6_seq_fops = { 251 .owner = THIS_MODULE, 252 .open = snmp6_seq_open, 253 .read = seq_read, 254 .llseek = seq_lseek, 255 .release = single_release_net, 256 }; 257 258 static int snmp6_dev_seq_show(struct seq_file *seq, void *v) 259 { 260 struct inet6_dev *idev = (struct inet6_dev *)seq->private; 261 262 seq_printf(seq, "%-32s\t%u\n", "ifIndex", idev->dev->ifindex); 263 snmp6_seq_show_item64(seq, idev->stats.ipv6, 264 snmp6_ipstats_list, offsetof(struct ipstats_mib, syncp)); 265 snmp6_seq_show_item(seq, NULL, idev->stats.icmpv6dev->mibs, 266 snmp6_icmp6_list); 267 snmp6_seq_show_icmpv6msg(seq, idev->stats.icmpv6msgdev->mibs); 268 return 0; 269 } 270 271 static int snmp6_dev_seq_open(struct inode *inode, struct file *file) 272 { 273 return single_open(file, snmp6_dev_seq_show, PDE_DATA(inode)); 274 } 275 276 static const struct file_operations snmp6_dev_seq_fops = { 277 .owner = THIS_MODULE, 278 .open = snmp6_dev_seq_open, 279 .read = seq_read, 280 .llseek = seq_lseek, 281 .release = single_release, 282 }; 283 284 int snmp6_register_dev(struct inet6_dev *idev) 285 { 286 struct proc_dir_entry *p; 287 struct net *net; 288 289 if (!idev || !idev->dev) 290 return -EINVAL; 291 292 net = dev_net(idev->dev); 293 if (!net->mib.proc_net_devsnmp6) 294 return -ENOENT; 295 296 p = proc_create_data(idev->dev->name, S_IRUGO, 297 net->mib.proc_net_devsnmp6, 298 &snmp6_dev_seq_fops, idev); 299 if (!p) 300 return -ENOMEM; 301 302 idev->stats.proc_dir_entry = p; 303 return 0; 304 } 305 306 int snmp6_unregister_dev(struct inet6_dev *idev) 307 { 308 struct net *net = dev_net(idev->dev); 309 if (!net->mib.proc_net_devsnmp6) 310 return -ENOENT; 311 if (!idev->stats.proc_dir_entry) 312 return -EINVAL; 313 proc_remove(idev->stats.proc_dir_entry); 314 idev->stats.proc_dir_entry = NULL; 315 return 0; 316 } 317 318 static int __net_init ipv6_proc_init_net(struct net *net) 319 { 320 if (!proc_create("sockstat6", S_IRUGO, net->proc_net, 321 &sockstat6_seq_fops)) 322 return -ENOMEM; 323 324 if (!proc_create("snmp6", S_IRUGO, net->proc_net, &snmp6_seq_fops)) 325 goto proc_snmp6_fail; 326 327 net->mib.proc_net_devsnmp6 = proc_mkdir("dev_snmp6", net->proc_net); 328 if (!net->mib.proc_net_devsnmp6) 329 goto proc_dev_snmp6_fail; 330 return 0; 331 332 proc_dev_snmp6_fail: 333 remove_proc_entry("snmp6", net->proc_net); 334 proc_snmp6_fail: 335 remove_proc_entry("sockstat6", net->proc_net); 336 return -ENOMEM; 337 } 338 339 static void __net_exit ipv6_proc_exit_net(struct net *net) 340 { 341 remove_proc_entry("sockstat6", net->proc_net); 342 remove_proc_entry("dev_snmp6", net->proc_net); 343 remove_proc_entry("snmp6", net->proc_net); 344 } 345 346 static struct pernet_operations ipv6_proc_ops = { 347 .init = ipv6_proc_init_net, 348 .exit = ipv6_proc_exit_net, 349 }; 350 351 int __init ipv6_misc_proc_init(void) 352 { 353 return register_pernet_subsys(&ipv6_proc_ops); 354 } 355 356 void ipv6_misc_proc_exit(void) 357 { 358 unregister_pernet_subsys(&ipv6_proc_ops); 359 } 360 361