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 37 seq_printf(seq, "TCP6: inuse %d\n", 38 sock_prot_inuse_get(net, &tcpv6_prot)); 39 seq_printf(seq, "UDP6: inuse %d\n", 40 sock_prot_inuse_get(net, &udpv6_prot)); 41 seq_printf(seq, "UDPLITE6: inuse %d\n", 42 sock_prot_inuse_get(net, &udplitev6_prot)); 43 seq_printf(seq, "RAW6: inuse %d\n", 44 sock_prot_inuse_get(net, &rawv6_prot)); 45 seq_printf(seq, "FRAG6: inuse %d memory %d\n", 46 ip6_frag_nqueues(net), ip6_frag_mem(net)); 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_SENTINEL 95 }; 96 97 static const struct snmp_mib snmp6_icmp6_list[] = { 98 /* icmpv6 mib according to RFC 2466 */ 99 SNMP_MIB_ITEM("Icmp6InMsgs", ICMP6_MIB_INMSGS), 100 SNMP_MIB_ITEM("Icmp6InErrors", ICMP6_MIB_INERRORS), 101 SNMP_MIB_ITEM("Icmp6OutMsgs", ICMP6_MIB_OUTMSGS), 102 SNMP_MIB_ITEM("Icmp6OutErrors", ICMP6_MIB_OUTERRORS), 103 SNMP_MIB_ITEM("Icmp6InCsumErrors", ICMP6_MIB_CSUMERRORS), 104 SNMP_MIB_SENTINEL 105 }; 106 107 /* RFC 4293 v6 ICMPMsgStatsTable; named items for RFC 2466 compatibility */ 108 static const char *const icmp6type2name[256] = { 109 [ICMPV6_DEST_UNREACH] = "DestUnreachs", 110 [ICMPV6_PKT_TOOBIG] = "PktTooBigs", 111 [ICMPV6_TIME_EXCEED] = "TimeExcds", 112 [ICMPV6_PARAMPROB] = "ParmProblems", 113 [ICMPV6_ECHO_REQUEST] = "Echos", 114 [ICMPV6_ECHO_REPLY] = "EchoReplies", 115 [ICMPV6_MGM_QUERY] = "GroupMembQueries", 116 [ICMPV6_MGM_REPORT] = "GroupMembResponses", 117 [ICMPV6_MGM_REDUCTION] = "GroupMembReductions", 118 [ICMPV6_MLD2_REPORT] = "MLDv2Reports", 119 [NDISC_ROUTER_ADVERTISEMENT] = "RouterAdvertisements", 120 [NDISC_ROUTER_SOLICITATION] = "RouterSolicits", 121 [NDISC_NEIGHBOUR_ADVERTISEMENT] = "NeighborAdvertisements", 122 [NDISC_NEIGHBOUR_SOLICITATION] = "NeighborSolicits", 123 [NDISC_REDIRECT] = "Redirects", 124 }; 125 126 127 static const struct snmp_mib snmp6_udp6_list[] = { 128 SNMP_MIB_ITEM("Udp6InDatagrams", UDP_MIB_INDATAGRAMS), 129 SNMP_MIB_ITEM("Udp6NoPorts", UDP_MIB_NOPORTS), 130 SNMP_MIB_ITEM("Udp6InErrors", UDP_MIB_INERRORS), 131 SNMP_MIB_ITEM("Udp6OutDatagrams", UDP_MIB_OUTDATAGRAMS), 132 SNMP_MIB_ITEM("Udp6RcvbufErrors", UDP_MIB_RCVBUFERRORS), 133 SNMP_MIB_ITEM("Udp6SndbufErrors", UDP_MIB_SNDBUFERRORS), 134 SNMP_MIB_ITEM("Udp6InCsumErrors", UDP_MIB_CSUMERRORS), 135 SNMP_MIB_SENTINEL 136 }; 137 138 static const struct snmp_mib snmp6_udplite6_list[] = { 139 SNMP_MIB_ITEM("UdpLite6InDatagrams", UDP_MIB_INDATAGRAMS), 140 SNMP_MIB_ITEM("UdpLite6NoPorts", UDP_MIB_NOPORTS), 141 SNMP_MIB_ITEM("UdpLite6InErrors", UDP_MIB_INERRORS), 142 SNMP_MIB_ITEM("UdpLite6OutDatagrams", UDP_MIB_OUTDATAGRAMS), 143 SNMP_MIB_ITEM("UdpLite6RcvbufErrors", UDP_MIB_RCVBUFERRORS), 144 SNMP_MIB_ITEM("UdpLite6SndbufErrors", UDP_MIB_SNDBUFERRORS), 145 SNMP_MIB_ITEM("UdpLite6InCsumErrors", UDP_MIB_CSUMERRORS), 146 SNMP_MIB_SENTINEL 147 }; 148 149 static void snmp6_seq_show_icmpv6msg(struct seq_file *seq, atomic_long_t *smib) 150 { 151 char name[32]; 152 int i; 153 154 /* print by name -- deprecated items */ 155 for (i = 0; i < ICMP6MSG_MIB_MAX; i++) { 156 int icmptype; 157 const char *p; 158 159 icmptype = i & 0xff; 160 p = icmp6type2name[icmptype]; 161 if (!p) /* don't print un-named types here */ 162 continue; 163 snprintf(name, sizeof(name), "Icmp6%s%s", 164 i & 0x100 ? "Out" : "In", p); 165 seq_printf(seq, "%-32s\t%lu\n", name, 166 atomic_long_read(smib + i)); 167 } 168 169 /* print by number (nonzero only) - ICMPMsgStat format */ 170 for (i = 0; i < ICMP6MSG_MIB_MAX; i++) { 171 unsigned long val; 172 173 val = atomic_long_read(smib + i); 174 if (!val) 175 continue; 176 snprintf(name, sizeof(name), "Icmp6%sType%u", 177 i & 0x100 ? "Out" : "In", i & 0xff); 178 seq_printf(seq, "%-32s\t%lu\n", name, val); 179 } 180 } 181 182 /* can be called either with percpu mib (pcpumib != NULL), 183 * or shared one (smib != NULL) 184 */ 185 static void snmp6_seq_show_item(struct seq_file *seq, void __percpu **pcpumib, 186 atomic_long_t *smib, 187 const struct snmp_mib *itemlist) 188 { 189 int i; 190 unsigned long val; 191 192 for (i = 0; itemlist[i].name; i++) { 193 val = pcpumib ? 194 snmp_fold_field(pcpumib, itemlist[i].entry) : 195 atomic_long_read(smib + itemlist[i].entry); 196 seq_printf(seq, "%-32s\t%lu\n", itemlist[i].name, val); 197 } 198 } 199 200 static void snmp6_seq_show_item64(struct seq_file *seq, void __percpu **mib, 201 const struct snmp_mib *itemlist, size_t syncpoff) 202 { 203 int i; 204 205 for (i = 0; itemlist[i].name; i++) 206 seq_printf(seq, "%-32s\t%llu\n", itemlist[i].name, 207 snmp_fold_field64(mib, itemlist[i].entry, syncpoff)); 208 } 209 210 static int snmp6_seq_show(struct seq_file *seq, void *v) 211 { 212 struct net *net = (struct net *)seq->private; 213 214 snmp6_seq_show_item64(seq, (void __percpu **)net->mib.ipv6_statistics, 215 snmp6_ipstats_list, offsetof(struct ipstats_mib, syncp)); 216 snmp6_seq_show_item(seq, (void __percpu **)net->mib.icmpv6_statistics, 217 NULL, snmp6_icmp6_list); 218 snmp6_seq_show_icmpv6msg(seq, net->mib.icmpv6msg_statistics->mibs); 219 snmp6_seq_show_item(seq, (void __percpu **)net->mib.udp_stats_in6, 220 NULL, snmp6_udp6_list); 221 snmp6_seq_show_item(seq, (void __percpu **)net->mib.udplite_stats_in6, 222 NULL, snmp6_udplite6_list); 223 return 0; 224 } 225 226 static int snmp6_seq_open(struct inode *inode, struct file *file) 227 { 228 return single_open_net(inode, file, snmp6_seq_show); 229 } 230 231 static const struct file_operations snmp6_seq_fops = { 232 .owner = THIS_MODULE, 233 .open = snmp6_seq_open, 234 .read = seq_read, 235 .llseek = seq_lseek, 236 .release = single_release_net, 237 }; 238 239 static int snmp6_dev_seq_show(struct seq_file *seq, void *v) 240 { 241 struct inet6_dev *idev = (struct inet6_dev *)seq->private; 242 243 seq_printf(seq, "%-32s\t%u\n", "ifIndex", idev->dev->ifindex); 244 snmp6_seq_show_item64(seq, (void __percpu **)idev->stats.ipv6, 245 snmp6_ipstats_list, offsetof(struct ipstats_mib, syncp)); 246 snmp6_seq_show_item(seq, NULL, idev->stats.icmpv6dev->mibs, 247 snmp6_icmp6_list); 248 snmp6_seq_show_icmpv6msg(seq, idev->stats.icmpv6msgdev->mibs); 249 return 0; 250 } 251 252 static int snmp6_dev_seq_open(struct inode *inode, struct file *file) 253 { 254 return single_open(file, snmp6_dev_seq_show, PDE_DATA(inode)); 255 } 256 257 static const struct file_operations snmp6_dev_seq_fops = { 258 .owner = THIS_MODULE, 259 .open = snmp6_dev_seq_open, 260 .read = seq_read, 261 .llseek = seq_lseek, 262 .release = single_release, 263 }; 264 265 int snmp6_register_dev(struct inet6_dev *idev) 266 { 267 struct proc_dir_entry *p; 268 struct net *net; 269 270 if (!idev || !idev->dev) 271 return -EINVAL; 272 273 net = dev_net(idev->dev); 274 if (!net->mib.proc_net_devsnmp6) 275 return -ENOENT; 276 277 p = proc_create_data(idev->dev->name, S_IRUGO, 278 net->mib.proc_net_devsnmp6, 279 &snmp6_dev_seq_fops, idev); 280 if (!p) 281 return -ENOMEM; 282 283 idev->stats.proc_dir_entry = p; 284 return 0; 285 } 286 287 int snmp6_unregister_dev(struct inet6_dev *idev) 288 { 289 struct net *net = dev_net(idev->dev); 290 if (!net->mib.proc_net_devsnmp6) 291 return -ENOENT; 292 if (!idev->stats.proc_dir_entry) 293 return -EINVAL; 294 proc_remove(idev->stats.proc_dir_entry); 295 idev->stats.proc_dir_entry = NULL; 296 return 0; 297 } 298 299 static int __net_init ipv6_proc_init_net(struct net *net) 300 { 301 if (!proc_create("sockstat6", S_IRUGO, net->proc_net, 302 &sockstat6_seq_fops)) 303 return -ENOMEM; 304 305 if (!proc_create("snmp6", S_IRUGO, net->proc_net, &snmp6_seq_fops)) 306 goto proc_snmp6_fail; 307 308 net->mib.proc_net_devsnmp6 = proc_mkdir("dev_snmp6", net->proc_net); 309 if (!net->mib.proc_net_devsnmp6) 310 goto proc_dev_snmp6_fail; 311 return 0; 312 313 proc_dev_snmp6_fail: 314 remove_proc_entry("snmp6", net->proc_net); 315 proc_snmp6_fail: 316 remove_proc_entry("sockstat6", net->proc_net); 317 return -ENOMEM; 318 } 319 320 static void __net_exit ipv6_proc_exit_net(struct net *net) 321 { 322 remove_proc_entry("sockstat6", net->proc_net); 323 remove_proc_entry("dev_snmp6", net->proc_net); 324 remove_proc_entry("snmp6", net->proc_net); 325 } 326 327 static struct pernet_operations ipv6_proc_ops = { 328 .init = ipv6_proc_init_net, 329 .exit = ipv6_proc_exit_net, 330 }; 331 332 int __init ipv6_misc_proc_init(void) 333 { 334 return register_pernet_subsys(&ipv6_proc_ops); 335 } 336 337 void ipv6_misc_proc_exit(void) 338 { 339 unregister_pernet_subsys(&ipv6_proc_ops); 340 } 341 342