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 <net/net_namespace.h> 25 #include <net/ip.h> 26 #include <net/sock.h> 27 #include <net/tcp.h> 28 #include <net/udp.h> 29 #include <net/transp_v6.h> 30 #include <net/ipv6.h> 31 32 static int sockstat6_seq_show(struct seq_file *seq, void *v) 33 { 34 struct net *net = seq->private; 35 36 seq_printf(seq, "TCP6: inuse %d\n", 37 sock_prot_inuse_get(net, &tcpv6_prot)); 38 seq_printf(seq, "UDP6: inuse %d\n", 39 sock_prot_inuse_get(net, &udpv6_prot)); 40 seq_printf(seq, "UDPLITE6: inuse %d\n", 41 sock_prot_inuse_get(net, &udplitev6_prot)); 42 seq_printf(seq, "RAW6: inuse %d\n", 43 sock_prot_inuse_get(net, &rawv6_prot)); 44 seq_printf(seq, "FRAG6: inuse %d memory %d\n", 45 ip6_frag_nqueues(net), ip6_frag_mem(net)); 46 return 0; 47 } 48 49 static int sockstat6_seq_open(struct inode *inode, struct file *file) 50 { 51 return single_open_net(inode, file, sockstat6_seq_show); 52 } 53 54 static const struct file_operations sockstat6_seq_fops = { 55 .owner = THIS_MODULE, 56 .open = sockstat6_seq_open, 57 .read = seq_read, 58 .llseek = seq_lseek, 59 .release = single_release_net, 60 }; 61 62 static const struct snmp_mib snmp6_ipstats_list[] = { 63 /* ipv6 mib according to RFC 2465 */ 64 SNMP_MIB_ITEM("Ip6InReceives", IPSTATS_MIB_INPKTS), 65 SNMP_MIB_ITEM("Ip6InHdrErrors", IPSTATS_MIB_INHDRERRORS), 66 SNMP_MIB_ITEM("Ip6InTooBigErrors", IPSTATS_MIB_INTOOBIGERRORS), 67 SNMP_MIB_ITEM("Ip6InNoRoutes", IPSTATS_MIB_INNOROUTES), 68 SNMP_MIB_ITEM("Ip6InAddrErrors", IPSTATS_MIB_INADDRERRORS), 69 SNMP_MIB_ITEM("Ip6InUnknownProtos", IPSTATS_MIB_INUNKNOWNPROTOS), 70 SNMP_MIB_ITEM("Ip6InTruncatedPkts", IPSTATS_MIB_INTRUNCATEDPKTS), 71 SNMP_MIB_ITEM("Ip6InDiscards", IPSTATS_MIB_INDISCARDS), 72 SNMP_MIB_ITEM("Ip6InDelivers", IPSTATS_MIB_INDELIVERS), 73 SNMP_MIB_ITEM("Ip6OutForwDatagrams", IPSTATS_MIB_OUTFORWDATAGRAMS), 74 SNMP_MIB_ITEM("Ip6OutRequests", IPSTATS_MIB_OUTPKTS), 75 SNMP_MIB_ITEM("Ip6OutDiscards", IPSTATS_MIB_OUTDISCARDS), 76 SNMP_MIB_ITEM("Ip6OutNoRoutes", IPSTATS_MIB_OUTNOROUTES), 77 SNMP_MIB_ITEM("Ip6ReasmTimeout", IPSTATS_MIB_REASMTIMEOUT), 78 SNMP_MIB_ITEM("Ip6ReasmReqds", IPSTATS_MIB_REASMREQDS), 79 SNMP_MIB_ITEM("Ip6ReasmOKs", IPSTATS_MIB_REASMOKS), 80 SNMP_MIB_ITEM("Ip6ReasmFails", IPSTATS_MIB_REASMFAILS), 81 SNMP_MIB_ITEM("Ip6FragOKs", IPSTATS_MIB_FRAGOKS), 82 SNMP_MIB_ITEM("Ip6FragFails", IPSTATS_MIB_FRAGFAILS), 83 SNMP_MIB_ITEM("Ip6FragCreates", IPSTATS_MIB_FRAGCREATES), 84 SNMP_MIB_ITEM("Ip6InMcastPkts", IPSTATS_MIB_INMCASTPKTS), 85 SNMP_MIB_ITEM("Ip6OutMcastPkts", IPSTATS_MIB_OUTMCASTPKTS), 86 SNMP_MIB_ITEM("Ip6InOctets", IPSTATS_MIB_INOCTETS), 87 SNMP_MIB_ITEM("Ip6OutOctets", IPSTATS_MIB_OUTOCTETS), 88 SNMP_MIB_ITEM("Ip6InMcastOctets", IPSTATS_MIB_INMCASTOCTETS), 89 SNMP_MIB_ITEM("Ip6OutMcastOctets", IPSTATS_MIB_OUTMCASTOCTETS), 90 SNMP_MIB_ITEM("Ip6InBcastOctets", IPSTATS_MIB_INBCASTOCTETS), 91 SNMP_MIB_ITEM("Ip6OutBcastOctets", IPSTATS_MIB_OUTBCASTOCTETS), 92 SNMP_MIB_SENTINEL 93 }; 94 95 static const struct snmp_mib snmp6_icmp6_list[] = { 96 /* icmpv6 mib according to RFC 2466 */ 97 SNMP_MIB_ITEM("Icmp6InMsgs", ICMP6_MIB_INMSGS), 98 SNMP_MIB_ITEM("Icmp6InErrors", ICMP6_MIB_INERRORS), 99 SNMP_MIB_ITEM("Icmp6OutMsgs", ICMP6_MIB_OUTMSGS), 100 SNMP_MIB_ITEM("Icmp6OutErrors", ICMP6_MIB_OUTERRORS), 101 SNMP_MIB_SENTINEL 102 }; 103 104 /* RFC 4293 v6 ICMPMsgStatsTable; named items for RFC 2466 compatibility */ 105 static const char *const icmp6type2name[256] = { 106 [ICMPV6_DEST_UNREACH] = "DestUnreachs", 107 [ICMPV6_PKT_TOOBIG] = "PktTooBigs", 108 [ICMPV6_TIME_EXCEED] = "TimeExcds", 109 [ICMPV6_PARAMPROB] = "ParmProblems", 110 [ICMPV6_ECHO_REQUEST] = "Echos", 111 [ICMPV6_ECHO_REPLY] = "EchoReplies", 112 [ICMPV6_MGM_QUERY] = "GroupMembQueries", 113 [ICMPV6_MGM_REPORT] = "GroupMembResponses", 114 [ICMPV6_MGM_REDUCTION] = "GroupMembReductions", 115 [ICMPV6_MLD2_REPORT] = "MLDv2Reports", 116 [NDISC_ROUTER_ADVERTISEMENT] = "RouterAdvertisements", 117 [NDISC_ROUTER_SOLICITATION] = "RouterSolicits", 118 [NDISC_NEIGHBOUR_ADVERTISEMENT] = "NeighborAdvertisements", 119 [NDISC_NEIGHBOUR_SOLICITATION] = "NeighborSolicits", 120 [NDISC_REDIRECT] = "Redirects", 121 }; 122 123 124 static const struct snmp_mib snmp6_udp6_list[] = { 125 SNMP_MIB_ITEM("Udp6InDatagrams", UDP_MIB_INDATAGRAMS), 126 SNMP_MIB_ITEM("Udp6NoPorts", UDP_MIB_NOPORTS), 127 SNMP_MIB_ITEM("Udp6InErrors", UDP_MIB_INERRORS), 128 SNMP_MIB_ITEM("Udp6OutDatagrams", UDP_MIB_OUTDATAGRAMS), 129 SNMP_MIB_ITEM("Udp6RcvbufErrors", UDP_MIB_RCVBUFERRORS), 130 SNMP_MIB_ITEM("Udp6SndbufErrors", UDP_MIB_SNDBUFERRORS), 131 SNMP_MIB_SENTINEL 132 }; 133 134 static const struct snmp_mib snmp6_udplite6_list[] = { 135 SNMP_MIB_ITEM("UdpLite6InDatagrams", UDP_MIB_INDATAGRAMS), 136 SNMP_MIB_ITEM("UdpLite6NoPorts", UDP_MIB_NOPORTS), 137 SNMP_MIB_ITEM("UdpLite6InErrors", UDP_MIB_INERRORS), 138 SNMP_MIB_ITEM("UdpLite6OutDatagrams", UDP_MIB_OUTDATAGRAMS), 139 SNMP_MIB_ITEM("UdpLite6RcvbufErrors", UDP_MIB_RCVBUFERRORS), 140 SNMP_MIB_ITEM("UdpLite6SndbufErrors", UDP_MIB_SNDBUFERRORS), 141 SNMP_MIB_SENTINEL 142 }; 143 144 /* can be called either with percpu mib (pcpumib != NULL), 145 * or shared one (smib != NULL) 146 */ 147 static void snmp6_seq_show_icmpv6msg(struct seq_file *seq, void __percpu **pcpumib, 148 atomic_long_t *smib) 149 { 150 char name[32]; 151 int i; 152 153 /* print by name -- deprecated items */ 154 for (i = 0; i < ICMP6MSG_MIB_MAX; i++) { 155 int icmptype; 156 const char *p; 157 158 icmptype = i & 0xff; 159 p = icmp6type2name[icmptype]; 160 if (!p) /* don't print un-named types here */ 161 continue; 162 snprintf(name, sizeof(name), "Icmp6%s%s", 163 i & 0x100 ? "Out" : "In", p); 164 seq_printf(seq, "%-32s\t%lu\n", name, 165 pcpumib ? snmp_fold_field(pcpumib, i) : atomic_long_read(smib + i)); 166 } 167 168 /* print by number (nonzero only) - ICMPMsgStat format */ 169 for (i = 0; i < ICMP6MSG_MIB_MAX; i++) { 170 unsigned long val; 171 172 val = pcpumib ? snmp_fold_field(pcpumib, i) : atomic_long_read(smib + i); 173 if (!val) 174 continue; 175 snprintf(name, sizeof(name), "Icmp6%sType%u", 176 i & 0x100 ? "Out" : "In", i & 0xff); 177 seq_printf(seq, "%-32s\t%lu\n", name, val); 178 } 179 } 180 181 /* can be called either with percpu mib (pcpumib != NULL), 182 * or shared one (smib != NULL) 183 */ 184 static void snmp6_seq_show_item(struct seq_file *seq, void __percpu **pcpumib, 185 atomic_long_t *smib, 186 const struct snmp_mib *itemlist) 187 { 188 int i; 189 unsigned long val; 190 191 for (i = 0; itemlist[i].name; i++) { 192 val = pcpumib ? 193 snmp_fold_field(pcpumib, itemlist[i].entry) : 194 atomic_long_read(smib + itemlist[i].entry); 195 seq_printf(seq, "%-32s\t%lu\n", itemlist[i].name, val); 196 } 197 } 198 199 static void snmp6_seq_show_item64(struct seq_file *seq, void __percpu **mib, 200 const struct snmp_mib *itemlist, size_t syncpoff) 201 { 202 int i; 203 204 for (i = 0; itemlist[i].name; i++) 205 seq_printf(seq, "%-32s\t%llu\n", itemlist[i].name, 206 snmp_fold_field64(mib, itemlist[i].entry, syncpoff)); 207 } 208 209 static int snmp6_seq_show(struct seq_file *seq, void *v) 210 { 211 struct net *net = (struct net *)seq->private; 212 213 snmp6_seq_show_item64(seq, (void __percpu **)net->mib.ipv6_statistics, 214 snmp6_ipstats_list, offsetof(struct ipstats_mib, syncp)); 215 snmp6_seq_show_item(seq, (void __percpu **)net->mib.icmpv6_statistics, 216 NULL, snmp6_icmp6_list); 217 snmp6_seq_show_icmpv6msg(seq, 218 (void __percpu **)net->mib.icmpv6msg_statistics, NULL); 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_item(seq, (void __percpu **)idev->stats.ipv6, NULL, 245 snmp6_ipstats_list); 246 snmp6_seq_show_item(seq, NULL, idev->stats.icmpv6dev->mibs, 247 snmp6_icmp6_list); 248 snmp6_seq_show_icmpv6msg(seq, NULL, 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(inode)->data); 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 remove_proc_entry(idev->stats.proc_dir_entry->name, 295 net->mib.proc_net_devsnmp6); 296 idev->stats.proc_dir_entry = NULL; 297 return 0; 298 } 299 300 static int __net_init ipv6_proc_init_net(struct net *net) 301 { 302 if (!proc_net_fops_create(net, "sockstat6", S_IRUGO, 303 &sockstat6_seq_fops)) 304 return -ENOMEM; 305 306 if (!proc_net_fops_create(net, "snmp6", S_IRUGO, &snmp6_seq_fops)) 307 goto proc_snmp6_fail; 308 309 net->mib.proc_net_devsnmp6 = proc_mkdir("dev_snmp6", net->proc_net); 310 if (!net->mib.proc_net_devsnmp6) 311 goto proc_dev_snmp6_fail; 312 return 0; 313 314 proc_snmp6_fail: 315 proc_net_remove(net, "sockstat6"); 316 proc_dev_snmp6_fail: 317 proc_net_remove(net, "dev_snmp6"); 318 return -ENOMEM; 319 } 320 321 static void __net_exit ipv6_proc_exit_net(struct net *net) 322 { 323 proc_net_remove(net, "sockstat6"); 324 proc_net_remove(net, "dev_snmp6"); 325 proc_net_remove(net, "snmp6"); 326 } 327 328 static struct pernet_operations ipv6_proc_ops = { 329 .init = ipv6_proc_init_net, 330 .exit = ipv6_proc_exit_net, 331 }; 332 333 int __init ipv6_misc_proc_init(void) 334 { 335 return register_pernet_subsys(&ipv6_proc_ops); 336 } 337 338 void ipv6_misc_proc_exit(void) 339 { 340 unregister_pernet_subsys(&ipv6_proc_ops); 341 } 342 343