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 SNMP_MIB_SENTINEL 94 }; 95 96 static const struct snmp_mib snmp6_icmp6_list[] = { 97 /* icmpv6 mib according to RFC 2466 */ 98 SNMP_MIB_ITEM("Icmp6InMsgs", ICMP6_MIB_INMSGS), 99 SNMP_MIB_ITEM("Icmp6InErrors", ICMP6_MIB_INERRORS), 100 SNMP_MIB_ITEM("Icmp6OutMsgs", ICMP6_MIB_OUTMSGS), 101 SNMP_MIB_ITEM("Icmp6OutErrors", ICMP6_MIB_OUTERRORS), 102 SNMP_MIB_SENTINEL 103 }; 104 105 /* RFC 4293 v6 ICMPMsgStatsTable; named items for RFC 2466 compatibility */ 106 static const char *const icmp6type2name[256] = { 107 [ICMPV6_DEST_UNREACH] = "DestUnreachs", 108 [ICMPV6_PKT_TOOBIG] = "PktTooBigs", 109 [ICMPV6_TIME_EXCEED] = "TimeExcds", 110 [ICMPV6_PARAMPROB] = "ParmProblems", 111 [ICMPV6_ECHO_REQUEST] = "Echos", 112 [ICMPV6_ECHO_REPLY] = "EchoReplies", 113 [ICMPV6_MGM_QUERY] = "GroupMembQueries", 114 [ICMPV6_MGM_REPORT] = "GroupMembResponses", 115 [ICMPV6_MGM_REDUCTION] = "GroupMembReductions", 116 [ICMPV6_MLD2_REPORT] = "MLDv2Reports", 117 [NDISC_ROUTER_ADVERTISEMENT] = "RouterAdvertisements", 118 [NDISC_ROUTER_SOLICITATION] = "RouterSolicits", 119 [NDISC_NEIGHBOUR_ADVERTISEMENT] = "NeighborAdvertisements", 120 [NDISC_NEIGHBOUR_SOLICITATION] = "NeighborSolicits", 121 [NDISC_REDIRECT] = "Redirects", 122 }; 123 124 125 static const struct snmp_mib snmp6_udp6_list[] = { 126 SNMP_MIB_ITEM("Udp6InDatagrams", UDP_MIB_INDATAGRAMS), 127 SNMP_MIB_ITEM("Udp6NoPorts", UDP_MIB_NOPORTS), 128 SNMP_MIB_ITEM("Udp6InErrors", UDP_MIB_INERRORS), 129 SNMP_MIB_ITEM("Udp6OutDatagrams", UDP_MIB_OUTDATAGRAMS), 130 SNMP_MIB_ITEM("Udp6RcvbufErrors", UDP_MIB_RCVBUFERRORS), 131 SNMP_MIB_ITEM("Udp6SndbufErrors", UDP_MIB_SNDBUFERRORS), 132 SNMP_MIB_SENTINEL 133 }; 134 135 static const struct snmp_mib snmp6_udplite6_list[] = { 136 SNMP_MIB_ITEM("UdpLite6InDatagrams", UDP_MIB_INDATAGRAMS), 137 SNMP_MIB_ITEM("UdpLite6NoPorts", UDP_MIB_NOPORTS), 138 SNMP_MIB_ITEM("UdpLite6InErrors", UDP_MIB_INERRORS), 139 SNMP_MIB_ITEM("UdpLite6OutDatagrams", UDP_MIB_OUTDATAGRAMS), 140 SNMP_MIB_ITEM("UdpLite6RcvbufErrors", UDP_MIB_RCVBUFERRORS), 141 SNMP_MIB_ITEM("UdpLite6SndbufErrors", UDP_MIB_SNDBUFERRORS), 142 SNMP_MIB_SENTINEL 143 }; 144 145 static void snmp6_seq_show_icmpv6msg(struct seq_file *seq, atomic_long_t *smib) 146 { 147 char name[32]; 148 int i; 149 150 /* print by name -- deprecated items */ 151 for (i = 0; i < ICMP6MSG_MIB_MAX; i++) { 152 int icmptype; 153 const char *p; 154 155 icmptype = i & 0xff; 156 p = icmp6type2name[icmptype]; 157 if (!p) /* don't print un-named types here */ 158 continue; 159 snprintf(name, sizeof(name), "Icmp6%s%s", 160 i & 0x100 ? "Out" : "In", p); 161 seq_printf(seq, "%-32s\t%lu\n", name, 162 atomic_long_read(smib + i)); 163 } 164 165 /* print by number (nonzero only) - ICMPMsgStat format */ 166 for (i = 0; i < ICMP6MSG_MIB_MAX; i++) { 167 unsigned long val; 168 169 val = atomic_long_read(smib + i); 170 if (!val) 171 continue; 172 snprintf(name, sizeof(name), "Icmp6%sType%u", 173 i & 0x100 ? "Out" : "In", i & 0xff); 174 seq_printf(seq, "%-32s\t%lu\n", name, val); 175 } 176 } 177 178 /* can be called either with percpu mib (pcpumib != NULL), 179 * or shared one (smib != NULL) 180 */ 181 static void snmp6_seq_show_item(struct seq_file *seq, void __percpu **pcpumib, 182 atomic_long_t *smib, 183 const struct snmp_mib *itemlist) 184 { 185 int i; 186 unsigned long val; 187 188 for (i = 0; itemlist[i].name; i++) { 189 val = pcpumib ? 190 snmp_fold_field(pcpumib, itemlist[i].entry) : 191 atomic_long_read(smib + itemlist[i].entry); 192 seq_printf(seq, "%-32s\t%lu\n", itemlist[i].name, val); 193 } 194 } 195 196 static void snmp6_seq_show_item64(struct seq_file *seq, void __percpu **mib, 197 const struct snmp_mib *itemlist, size_t syncpoff) 198 { 199 int i; 200 201 for (i = 0; itemlist[i].name; i++) 202 seq_printf(seq, "%-32s\t%llu\n", itemlist[i].name, 203 snmp_fold_field64(mib, itemlist[i].entry, syncpoff)); 204 } 205 206 static int snmp6_seq_show(struct seq_file *seq, void *v) 207 { 208 struct net *net = (struct net *)seq->private; 209 210 snmp6_seq_show_item64(seq, (void __percpu **)net->mib.ipv6_statistics, 211 snmp6_ipstats_list, offsetof(struct ipstats_mib, syncp)); 212 snmp6_seq_show_item(seq, (void __percpu **)net->mib.icmpv6_statistics, 213 NULL, snmp6_icmp6_list); 214 snmp6_seq_show_icmpv6msg(seq, net->mib.icmpv6msg_statistics->mibs); 215 snmp6_seq_show_item(seq, (void __percpu **)net->mib.udp_stats_in6, 216 NULL, snmp6_udp6_list); 217 snmp6_seq_show_item(seq, (void __percpu **)net->mib.udplite_stats_in6, 218 NULL, snmp6_udplite6_list); 219 return 0; 220 } 221 222 static int snmp6_seq_open(struct inode *inode, struct file *file) 223 { 224 return single_open_net(inode, file, snmp6_seq_show); 225 } 226 227 static const struct file_operations snmp6_seq_fops = { 228 .owner = THIS_MODULE, 229 .open = snmp6_seq_open, 230 .read = seq_read, 231 .llseek = seq_lseek, 232 .release = single_release_net, 233 }; 234 235 static int snmp6_dev_seq_show(struct seq_file *seq, void *v) 236 { 237 struct inet6_dev *idev = (struct inet6_dev *)seq->private; 238 239 seq_printf(seq, "%-32s\t%u\n", "ifIndex", idev->dev->ifindex); 240 snmp6_seq_show_item64(seq, (void __percpu **)idev->stats.ipv6, 241 snmp6_ipstats_list, offsetof(struct ipstats_mib, syncp)); 242 snmp6_seq_show_item(seq, NULL, idev->stats.icmpv6dev->mibs, 243 snmp6_icmp6_list); 244 snmp6_seq_show_icmpv6msg(seq, idev->stats.icmpv6msgdev->mibs); 245 return 0; 246 } 247 248 static int snmp6_dev_seq_open(struct inode *inode, struct file *file) 249 { 250 return single_open(file, snmp6_dev_seq_show, PDE(inode)->data); 251 } 252 253 static const struct file_operations snmp6_dev_seq_fops = { 254 .owner = THIS_MODULE, 255 .open = snmp6_dev_seq_open, 256 .read = seq_read, 257 .llseek = seq_lseek, 258 .release = single_release, 259 }; 260 261 int snmp6_register_dev(struct inet6_dev *idev) 262 { 263 struct proc_dir_entry *p; 264 struct net *net; 265 266 if (!idev || !idev->dev) 267 return -EINVAL; 268 269 net = dev_net(idev->dev); 270 if (!net->mib.proc_net_devsnmp6) 271 return -ENOENT; 272 273 p = proc_create_data(idev->dev->name, S_IRUGO, 274 net->mib.proc_net_devsnmp6, 275 &snmp6_dev_seq_fops, idev); 276 if (!p) 277 return -ENOMEM; 278 279 idev->stats.proc_dir_entry = p; 280 return 0; 281 } 282 283 int snmp6_unregister_dev(struct inet6_dev *idev) 284 { 285 struct net *net = dev_net(idev->dev); 286 if (!net->mib.proc_net_devsnmp6) 287 return -ENOENT; 288 if (!idev->stats.proc_dir_entry) 289 return -EINVAL; 290 remove_proc_entry(idev->stats.proc_dir_entry->name, 291 net->mib.proc_net_devsnmp6); 292 idev->stats.proc_dir_entry = NULL; 293 return 0; 294 } 295 296 static int __net_init ipv6_proc_init_net(struct net *net) 297 { 298 if (!proc_net_fops_create(net, "sockstat6", S_IRUGO, 299 &sockstat6_seq_fops)) 300 return -ENOMEM; 301 302 if (!proc_net_fops_create(net, "snmp6", S_IRUGO, &snmp6_seq_fops)) 303 goto proc_snmp6_fail; 304 305 net->mib.proc_net_devsnmp6 = proc_mkdir("dev_snmp6", net->proc_net); 306 if (!net->mib.proc_net_devsnmp6) 307 goto proc_dev_snmp6_fail; 308 return 0; 309 310 proc_dev_snmp6_fail: 311 proc_net_remove(net, "snmp6"); 312 proc_snmp6_fail: 313 proc_net_remove(net, "sockstat6"); 314 return -ENOMEM; 315 } 316 317 static void __net_exit ipv6_proc_exit_net(struct net *net) 318 { 319 proc_net_remove(net, "sockstat6"); 320 proc_net_remove(net, "dev_snmp6"); 321 proc_net_remove(net, "snmp6"); 322 } 323 324 static struct pernet_operations ipv6_proc_ops = { 325 .init = ipv6_proc_init_net, 326 .exit = ipv6_proc_exit_net, 327 }; 328 329 int __init ipv6_misc_proc_init(void) 330 { 331 return register_pernet_subsys(&ipv6_proc_ops); 332 } 333 334 void ipv6_misc_proc_exit(void) 335 { 336 unregister_pernet_subsys(&ipv6_proc_ops); 337 } 338 339