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 static int sockstat6_seq_show(struct seq_file *seq, void *v) 34 { 35 struct net *net = seq->private; 36 unsigned int frag_mem = ip6_frag_mem(net); 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 %u\n", !!frag_mem, frag_mem); 47 return 0; 48 } 49 50 static int sockstat6_seq_open(struct inode *inode, struct file *file) 51 { 52 return single_open_net(inode, file, sockstat6_seq_show); 53 } 54 55 static const struct file_operations sockstat6_seq_fops = { 56 .owner = THIS_MODULE, 57 .open = sockstat6_seq_open, 58 .read = seq_read, 59 .llseek = seq_lseek, 60 .release = single_release_net, 61 }; 62 63 static const struct snmp_mib snmp6_ipstats_list[] = { 64 /* ipv6 mib according to RFC 2465 */ 65 SNMP_MIB_ITEM("Ip6InReceives", IPSTATS_MIB_INPKTS), 66 SNMP_MIB_ITEM("Ip6InHdrErrors", IPSTATS_MIB_INHDRERRORS), 67 SNMP_MIB_ITEM("Ip6InTooBigErrors", IPSTATS_MIB_INTOOBIGERRORS), 68 SNMP_MIB_ITEM("Ip6InNoRoutes", IPSTATS_MIB_INNOROUTES), 69 SNMP_MIB_ITEM("Ip6InAddrErrors", IPSTATS_MIB_INADDRERRORS), 70 SNMP_MIB_ITEM("Ip6InUnknownProtos", IPSTATS_MIB_INUNKNOWNPROTOS), 71 SNMP_MIB_ITEM("Ip6InTruncatedPkts", IPSTATS_MIB_INTRUNCATEDPKTS), 72 SNMP_MIB_ITEM("Ip6InDiscards", IPSTATS_MIB_INDISCARDS), 73 SNMP_MIB_ITEM("Ip6InDelivers", IPSTATS_MIB_INDELIVERS), 74 SNMP_MIB_ITEM("Ip6OutForwDatagrams", IPSTATS_MIB_OUTFORWDATAGRAMS), 75 SNMP_MIB_ITEM("Ip6OutRequests", IPSTATS_MIB_OUTPKTS), 76 SNMP_MIB_ITEM("Ip6OutDiscards", IPSTATS_MIB_OUTDISCARDS), 77 SNMP_MIB_ITEM("Ip6OutNoRoutes", IPSTATS_MIB_OUTNOROUTES), 78 SNMP_MIB_ITEM("Ip6ReasmTimeout", IPSTATS_MIB_REASMTIMEOUT), 79 SNMP_MIB_ITEM("Ip6ReasmReqds", IPSTATS_MIB_REASMREQDS), 80 SNMP_MIB_ITEM("Ip6ReasmOKs", IPSTATS_MIB_REASMOKS), 81 SNMP_MIB_ITEM("Ip6ReasmFails", IPSTATS_MIB_REASMFAILS), 82 SNMP_MIB_ITEM("Ip6FragOKs", IPSTATS_MIB_FRAGOKS), 83 SNMP_MIB_ITEM("Ip6FragFails", IPSTATS_MIB_FRAGFAILS), 84 SNMP_MIB_ITEM("Ip6FragCreates", IPSTATS_MIB_FRAGCREATES), 85 SNMP_MIB_ITEM("Ip6InMcastPkts", IPSTATS_MIB_INMCASTPKTS), 86 SNMP_MIB_ITEM("Ip6OutMcastPkts", IPSTATS_MIB_OUTMCASTPKTS), 87 SNMP_MIB_ITEM("Ip6InOctets", IPSTATS_MIB_INOCTETS), 88 SNMP_MIB_ITEM("Ip6OutOctets", IPSTATS_MIB_OUTOCTETS), 89 SNMP_MIB_ITEM("Ip6InMcastOctets", IPSTATS_MIB_INMCASTOCTETS), 90 SNMP_MIB_ITEM("Ip6OutMcastOctets", IPSTATS_MIB_OUTMCASTOCTETS), 91 SNMP_MIB_ITEM("Ip6InBcastOctets", IPSTATS_MIB_INBCASTOCTETS), 92 SNMP_MIB_ITEM("Ip6OutBcastOctets", IPSTATS_MIB_OUTBCASTOCTETS), 93 /* IPSTATS_MIB_CSUMERRORS is not relevant in IPv6 (no checksum) */ 94 SNMP_MIB_ITEM("Ip6InNoECTPkts", IPSTATS_MIB_NOECTPKTS), 95 SNMP_MIB_ITEM("Ip6InECT1Pkts", IPSTATS_MIB_ECT1PKTS), 96 SNMP_MIB_ITEM("Ip6InECT0Pkts", IPSTATS_MIB_ECT0PKTS), 97 SNMP_MIB_ITEM("Ip6InCEPkts", IPSTATS_MIB_CEPKTS), 98 SNMP_MIB_SENTINEL 99 }; 100 101 static const struct snmp_mib snmp6_icmp6_list[] = { 102 /* icmpv6 mib according to RFC 2466 */ 103 SNMP_MIB_ITEM("Icmp6InMsgs", ICMP6_MIB_INMSGS), 104 SNMP_MIB_ITEM("Icmp6InErrors", ICMP6_MIB_INERRORS), 105 SNMP_MIB_ITEM("Icmp6OutMsgs", ICMP6_MIB_OUTMSGS), 106 SNMP_MIB_ITEM("Icmp6OutErrors", ICMP6_MIB_OUTERRORS), 107 SNMP_MIB_ITEM("Icmp6InCsumErrors", ICMP6_MIB_CSUMERRORS), 108 SNMP_MIB_SENTINEL 109 }; 110 111 /* RFC 4293 v6 ICMPMsgStatsTable; named items for RFC 2466 compatibility */ 112 static const char *const icmp6type2name[256] = { 113 [ICMPV6_DEST_UNREACH] = "DestUnreachs", 114 [ICMPV6_PKT_TOOBIG] = "PktTooBigs", 115 [ICMPV6_TIME_EXCEED] = "TimeExcds", 116 [ICMPV6_PARAMPROB] = "ParmProblems", 117 [ICMPV6_ECHO_REQUEST] = "Echos", 118 [ICMPV6_ECHO_REPLY] = "EchoReplies", 119 [ICMPV6_MGM_QUERY] = "GroupMembQueries", 120 [ICMPV6_MGM_REPORT] = "GroupMembResponses", 121 [ICMPV6_MGM_REDUCTION] = "GroupMembReductions", 122 [ICMPV6_MLD2_REPORT] = "MLDv2Reports", 123 [NDISC_ROUTER_ADVERTISEMENT] = "RouterAdvertisements", 124 [NDISC_ROUTER_SOLICITATION] = "RouterSolicits", 125 [NDISC_NEIGHBOUR_ADVERTISEMENT] = "NeighborAdvertisements", 126 [NDISC_NEIGHBOUR_SOLICITATION] = "NeighborSolicits", 127 [NDISC_REDIRECT] = "Redirects", 128 }; 129 130 131 static const struct snmp_mib snmp6_udp6_list[] = { 132 SNMP_MIB_ITEM("Udp6InDatagrams", UDP_MIB_INDATAGRAMS), 133 SNMP_MIB_ITEM("Udp6NoPorts", UDP_MIB_NOPORTS), 134 SNMP_MIB_ITEM("Udp6InErrors", UDP_MIB_INERRORS), 135 SNMP_MIB_ITEM("Udp6OutDatagrams", UDP_MIB_OUTDATAGRAMS), 136 SNMP_MIB_ITEM("Udp6RcvbufErrors", UDP_MIB_RCVBUFERRORS), 137 SNMP_MIB_ITEM("Udp6SndbufErrors", UDP_MIB_SNDBUFERRORS), 138 SNMP_MIB_ITEM("Udp6InCsumErrors", UDP_MIB_CSUMERRORS), 139 SNMP_MIB_SENTINEL 140 }; 141 142 static const struct snmp_mib snmp6_udplite6_list[] = { 143 SNMP_MIB_ITEM("UdpLite6InDatagrams", UDP_MIB_INDATAGRAMS), 144 SNMP_MIB_ITEM("UdpLite6NoPorts", UDP_MIB_NOPORTS), 145 SNMP_MIB_ITEM("UdpLite6InErrors", UDP_MIB_INERRORS), 146 SNMP_MIB_ITEM("UdpLite6OutDatagrams", UDP_MIB_OUTDATAGRAMS), 147 SNMP_MIB_ITEM("UdpLite6RcvbufErrors", UDP_MIB_RCVBUFERRORS), 148 SNMP_MIB_ITEM("UdpLite6SndbufErrors", UDP_MIB_SNDBUFERRORS), 149 SNMP_MIB_ITEM("UdpLite6InCsumErrors", UDP_MIB_CSUMERRORS), 150 SNMP_MIB_SENTINEL 151 }; 152 153 static void snmp6_seq_show_icmpv6msg(struct seq_file *seq, atomic_long_t *smib) 154 { 155 char name[32]; 156 int i; 157 158 /* print by name -- deprecated items */ 159 for (i = 0; i < ICMP6MSG_MIB_MAX; i++) { 160 int icmptype; 161 const char *p; 162 163 icmptype = i & 0xff; 164 p = icmp6type2name[icmptype]; 165 if (!p) /* don't print un-named types here */ 166 continue; 167 snprintf(name, sizeof(name), "Icmp6%s%s", 168 i & 0x100 ? "Out" : "In", p); 169 seq_printf(seq, "%-32s\t%lu\n", name, 170 atomic_long_read(smib + i)); 171 } 172 173 /* print by number (nonzero only) - ICMPMsgStat format */ 174 for (i = 0; i < ICMP6MSG_MIB_MAX; i++) { 175 unsigned long val; 176 177 val = atomic_long_read(smib + i); 178 if (!val) 179 continue; 180 snprintf(name, sizeof(name), "Icmp6%sType%u", 181 i & 0x100 ? "Out" : "In", i & 0xff); 182 seq_printf(seq, "%-32s\t%lu\n", name, val); 183 } 184 } 185 186 /* can be called either with percpu mib (pcpumib != NULL), 187 * or shared one (smib != NULL) 188 */ 189 static void snmp6_seq_show_item(struct seq_file *seq, void __percpu *pcpumib, 190 atomic_long_t *smib, 191 const struct snmp_mib *itemlist) 192 { 193 int i; 194 unsigned long val; 195 196 for (i = 0; itemlist[i].name; i++) { 197 val = pcpumib ? 198 snmp_fold_field(pcpumib, itemlist[i].entry) : 199 atomic_long_read(smib + itemlist[i].entry); 200 seq_printf(seq, "%-32s\t%lu\n", itemlist[i].name, val); 201 } 202 } 203 204 static void snmp6_seq_show_item64(struct seq_file *seq, void __percpu *mib, 205 const struct snmp_mib *itemlist, size_t syncpoff) 206 { 207 int i; 208 209 for (i = 0; itemlist[i].name; i++) 210 seq_printf(seq, "%-32s\t%llu\n", itemlist[i].name, 211 snmp_fold_field64(mib, itemlist[i].entry, syncpoff)); 212 } 213 214 static int snmp6_seq_show(struct seq_file *seq, void *v) 215 { 216 struct net *net = (struct net *)seq->private; 217 218 snmp6_seq_show_item64(seq, net->mib.ipv6_statistics, 219 snmp6_ipstats_list, offsetof(struct ipstats_mib, syncp)); 220 snmp6_seq_show_item(seq, net->mib.icmpv6_statistics, 221 NULL, snmp6_icmp6_list); 222 snmp6_seq_show_icmpv6msg(seq, net->mib.icmpv6msg_statistics->mibs); 223 snmp6_seq_show_item(seq, net->mib.udp_stats_in6, 224 NULL, snmp6_udp6_list); 225 snmp6_seq_show_item(seq, net->mib.udplite_stats_in6, 226 NULL, snmp6_udplite6_list); 227 return 0; 228 } 229 230 static int snmp6_seq_open(struct inode *inode, struct file *file) 231 { 232 return single_open_net(inode, file, snmp6_seq_show); 233 } 234 235 static const struct file_operations snmp6_seq_fops = { 236 .owner = THIS_MODULE, 237 .open = snmp6_seq_open, 238 .read = seq_read, 239 .llseek = seq_lseek, 240 .release = single_release_net, 241 }; 242 243 static int snmp6_dev_seq_show(struct seq_file *seq, void *v) 244 { 245 struct inet6_dev *idev = (struct inet6_dev *)seq->private; 246 247 seq_printf(seq, "%-32s\t%u\n", "ifIndex", idev->dev->ifindex); 248 snmp6_seq_show_item64(seq, idev->stats.ipv6, 249 snmp6_ipstats_list, offsetof(struct ipstats_mib, syncp)); 250 snmp6_seq_show_item(seq, NULL, idev->stats.icmpv6dev->mibs, 251 snmp6_icmp6_list); 252 snmp6_seq_show_icmpv6msg(seq, idev->stats.icmpv6msgdev->mibs); 253 return 0; 254 } 255 256 static int snmp6_dev_seq_open(struct inode *inode, struct file *file) 257 { 258 return single_open(file, snmp6_dev_seq_show, PDE_DATA(inode)); 259 } 260 261 static const struct file_operations snmp6_dev_seq_fops = { 262 .owner = THIS_MODULE, 263 .open = snmp6_dev_seq_open, 264 .read = seq_read, 265 .llseek = seq_lseek, 266 .release = single_release, 267 }; 268 269 int snmp6_register_dev(struct inet6_dev *idev) 270 { 271 struct proc_dir_entry *p; 272 struct net *net; 273 274 if (!idev || !idev->dev) 275 return -EINVAL; 276 277 net = dev_net(idev->dev); 278 if (!net->mib.proc_net_devsnmp6) 279 return -ENOENT; 280 281 p = proc_create_data(idev->dev->name, S_IRUGO, 282 net->mib.proc_net_devsnmp6, 283 &snmp6_dev_seq_fops, idev); 284 if (!p) 285 return -ENOMEM; 286 287 idev->stats.proc_dir_entry = p; 288 return 0; 289 } 290 291 int snmp6_unregister_dev(struct inet6_dev *idev) 292 { 293 struct net *net = dev_net(idev->dev); 294 if (!net->mib.proc_net_devsnmp6) 295 return -ENOENT; 296 if (!idev->stats.proc_dir_entry) 297 return -EINVAL; 298 proc_remove(idev->stats.proc_dir_entry); 299 idev->stats.proc_dir_entry = NULL; 300 return 0; 301 } 302 303 static int __net_init ipv6_proc_init_net(struct net *net) 304 { 305 if (!proc_create("sockstat6", S_IRUGO, net->proc_net, 306 &sockstat6_seq_fops)) 307 return -ENOMEM; 308 309 if (!proc_create("snmp6", S_IRUGO, net->proc_net, &snmp6_seq_fops)) 310 goto proc_snmp6_fail; 311 312 net->mib.proc_net_devsnmp6 = proc_mkdir("dev_snmp6", net->proc_net); 313 if (!net->mib.proc_net_devsnmp6) 314 goto proc_dev_snmp6_fail; 315 return 0; 316 317 proc_dev_snmp6_fail: 318 remove_proc_entry("snmp6", net->proc_net); 319 proc_snmp6_fail: 320 remove_proc_entry("sockstat6", net->proc_net); 321 return -ENOMEM; 322 } 323 324 static void __net_exit ipv6_proc_exit_net(struct net *net) 325 { 326 remove_proc_entry("sockstat6", net->proc_net); 327 remove_proc_entry("dev_snmp6", net->proc_net); 328 remove_proc_entry("snmp6", net->proc_net); 329 } 330 331 static struct pernet_operations ipv6_proc_ops = { 332 .init = ipv6_proc_init_net, 333 .exit = ipv6_proc_exit_net, 334 }; 335 336 int __init ipv6_misc_proc_init(void) 337 { 338 return register_pernet_subsys(&ipv6_proc_ops); 339 } 340 341 void ipv6_misc_proc_exit(void) 342 { 343 unregister_pernet_subsys(&ipv6_proc_ops); 344 } 345 346