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 struct snmp_mib snmp6_ipstats_list[] = { 63 /* ipv6 mib according to RFC 2465 */ 64 SNMP_MIB_ITEM("Ip6InReceives", IPSTATS_MIB_INRECEIVES), 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_OUTREQUESTS), 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_SENTINEL 87 }; 88 89 static struct snmp_mib snmp6_icmp6_list[] = { 90 /* icmpv6 mib according to RFC 2466 */ 91 SNMP_MIB_ITEM("Icmp6InMsgs", ICMP6_MIB_INMSGS), 92 SNMP_MIB_ITEM("Icmp6InErrors", ICMP6_MIB_INERRORS), 93 SNMP_MIB_ITEM("Icmp6OutMsgs", ICMP6_MIB_OUTMSGS), 94 SNMP_MIB_SENTINEL 95 }; 96 97 /* RFC 4293 v6 ICMPMsgStatsTable; named items for RFC 2466 compatibility */ 98 static char *icmp6type2name[256] = { 99 [ICMPV6_DEST_UNREACH] = "DestUnreachs", 100 [ICMPV6_PKT_TOOBIG] = "PktTooBigs", 101 [ICMPV6_TIME_EXCEED] = "TimeExcds", 102 [ICMPV6_PARAMPROB] = "ParmProblems", 103 [ICMPV6_ECHO_REQUEST] = "Echos", 104 [ICMPV6_ECHO_REPLY] = "EchoReplies", 105 [ICMPV6_MGM_QUERY] = "GroupMembQueries", 106 [ICMPV6_MGM_REPORT] = "GroupMembResponses", 107 [ICMPV6_MGM_REDUCTION] = "GroupMembReductions", 108 [ICMPV6_MLD2_REPORT] = "MLDv2Reports", 109 [NDISC_ROUTER_ADVERTISEMENT] = "RouterAdvertisements", 110 [NDISC_ROUTER_SOLICITATION] = "RouterSolicits", 111 [NDISC_NEIGHBOUR_ADVERTISEMENT] = "NeighborAdvertisements", 112 [NDISC_NEIGHBOUR_SOLICITATION] = "NeighborSolicits", 113 [NDISC_REDIRECT] = "Redirects", 114 }; 115 116 117 static struct snmp_mib snmp6_udp6_list[] = { 118 SNMP_MIB_ITEM("Udp6InDatagrams", UDP_MIB_INDATAGRAMS), 119 SNMP_MIB_ITEM("Udp6NoPorts", UDP_MIB_NOPORTS), 120 SNMP_MIB_ITEM("Udp6InErrors", UDP_MIB_INERRORS), 121 SNMP_MIB_ITEM("Udp6OutDatagrams", UDP_MIB_OUTDATAGRAMS), 122 SNMP_MIB_SENTINEL 123 }; 124 125 static struct snmp_mib snmp6_udplite6_list[] = { 126 SNMP_MIB_ITEM("UdpLite6InDatagrams", UDP_MIB_INDATAGRAMS), 127 SNMP_MIB_ITEM("UdpLite6NoPorts", UDP_MIB_NOPORTS), 128 SNMP_MIB_ITEM("UdpLite6InErrors", UDP_MIB_INERRORS), 129 SNMP_MIB_ITEM("UdpLite6OutDatagrams", UDP_MIB_OUTDATAGRAMS), 130 SNMP_MIB_SENTINEL 131 }; 132 133 static void snmp6_seq_show_icmpv6msg(struct seq_file *seq, void **mib) 134 { 135 static char name[32]; 136 int i; 137 138 /* print by name -- deprecated items */ 139 for (i = 0; i < ICMP6MSG_MIB_MAX; i++) { 140 int icmptype; 141 char *p; 142 143 icmptype = i & 0xff; 144 p = icmp6type2name[icmptype]; 145 if (!p) /* don't print un-named types here */ 146 continue; 147 (void) snprintf(name, sizeof(name)-1, "Icmp6%s%s", 148 i & 0x100 ? "Out" : "In", p); 149 seq_printf(seq, "%-32s\t%lu\n", name, 150 snmp_fold_field(mib, i)); 151 } 152 153 /* print by number (nonzero only) - ICMPMsgStat format */ 154 for (i = 0; i < ICMP6MSG_MIB_MAX; i++) { 155 unsigned long val; 156 157 val = snmp_fold_field(mib, i); 158 if (!val) 159 continue; 160 (void) snprintf(name, sizeof(name)-1, "Icmp6%sType%u", 161 i & 0x100 ? "Out" : "In", i & 0xff); 162 seq_printf(seq, "%-32s\t%lu\n", name, val); 163 } 164 return; 165 } 166 167 static inline void 168 snmp6_seq_show_item(struct seq_file *seq, void **mib, struct snmp_mib *itemlist) 169 { 170 int i; 171 for (i=0; itemlist[i].name; i++) 172 seq_printf(seq, "%-32s\t%lu\n", itemlist[i].name, 173 snmp_fold_field(mib, itemlist[i].entry)); 174 } 175 176 static int snmp6_seq_show(struct seq_file *seq, void *v) 177 { 178 struct net *net = (struct net *)seq->private; 179 180 snmp6_seq_show_item(seq, (void **)net->mib.ipv6_statistics, 181 snmp6_ipstats_list); 182 snmp6_seq_show_item(seq, (void **)net->mib.icmpv6_statistics, 183 snmp6_icmp6_list); 184 snmp6_seq_show_icmpv6msg(seq, (void **)net->mib.icmpv6msg_statistics); 185 snmp6_seq_show_item(seq, (void **)net->mib.udp_stats_in6, 186 snmp6_udp6_list); 187 snmp6_seq_show_item(seq, (void **)net->mib.udplite_stats_in6, 188 snmp6_udplite6_list); 189 return 0; 190 } 191 192 static int snmp6_seq_open(struct inode *inode, struct file *file) 193 { 194 return single_open_net(inode, file, snmp6_seq_show); 195 } 196 197 static const struct file_operations snmp6_seq_fops = { 198 .owner = THIS_MODULE, 199 .open = snmp6_seq_open, 200 .read = seq_read, 201 .llseek = seq_lseek, 202 .release = single_release_net, 203 }; 204 205 static int snmp6_dev_seq_show(struct seq_file *seq, void *v) 206 { 207 struct inet6_dev *idev = (struct inet6_dev *)seq->private; 208 209 seq_printf(seq, "%-32s\t%u\n", "ifIndex", idev->dev->ifindex); 210 snmp6_seq_show_item(seq, (void **)idev->stats.ipv6, snmp6_ipstats_list); 211 snmp6_seq_show_item(seq, (void **)idev->stats.icmpv6, snmp6_icmp6_list); 212 snmp6_seq_show_icmpv6msg(seq, (void **)idev->stats.icmpv6msg); 213 return 0; 214 } 215 216 static int snmp6_dev_seq_open(struct inode *inode, struct file *file) 217 { 218 return single_open(file, snmp6_dev_seq_show, PDE(inode)->data); 219 } 220 221 static const struct file_operations snmp6_dev_seq_fops = { 222 .owner = THIS_MODULE, 223 .open = snmp6_dev_seq_open, 224 .read = seq_read, 225 .llseek = seq_lseek, 226 .release = single_release, 227 }; 228 229 int snmp6_register_dev(struct inet6_dev *idev) 230 { 231 struct proc_dir_entry *p; 232 struct net *net; 233 234 if (!idev || !idev->dev) 235 return -EINVAL; 236 237 net = dev_net(idev->dev); 238 if (!net->mib.proc_net_devsnmp6) 239 return -ENOENT; 240 241 p = proc_create_data(idev->dev->name, S_IRUGO, 242 net->mib.proc_net_devsnmp6, 243 &snmp6_dev_seq_fops, idev); 244 if (!p) 245 return -ENOMEM; 246 247 idev->stats.proc_dir_entry = p; 248 return 0; 249 } 250 251 int snmp6_unregister_dev(struct inet6_dev *idev) 252 { 253 struct net *net = dev_net(idev->dev); 254 if (!net->mib.proc_net_devsnmp6) 255 return -ENOENT; 256 if (!idev || !idev->stats.proc_dir_entry) 257 return -EINVAL; 258 remove_proc_entry(idev->stats.proc_dir_entry->name, 259 net->mib.proc_net_devsnmp6); 260 idev->stats.proc_dir_entry = NULL; 261 return 0; 262 } 263 264 static int ipv6_proc_init_net(struct net *net) 265 { 266 if (!proc_net_fops_create(net, "sockstat6", S_IRUGO, 267 &sockstat6_seq_fops)) 268 return -ENOMEM; 269 270 if (!proc_net_fops_create(net, "snmp6", S_IRUGO, &snmp6_seq_fops)) 271 goto proc_snmp6_fail; 272 273 net->mib.proc_net_devsnmp6 = proc_mkdir("dev_snmp6", net->proc_net); 274 if (!net->mib.proc_net_devsnmp6) 275 goto proc_dev_snmp6_fail; 276 return 0; 277 278 proc_snmp6_fail: 279 proc_net_remove(net, "sockstat6"); 280 proc_dev_snmp6_fail: 281 proc_net_remove(net, "dev_snmp6"); 282 return -ENOMEM; 283 } 284 285 static void ipv6_proc_exit_net(struct net *net) 286 { 287 proc_net_remove(net, "sockstat6"); 288 proc_net_remove(net, "dev_snmp6"); 289 proc_net_remove(net, "snmp6"); 290 } 291 292 static struct pernet_operations ipv6_proc_ops = { 293 .init = ipv6_proc_init_net, 294 .exit = ipv6_proc_exit_net, 295 }; 296 297 int __init ipv6_misc_proc_init(void) 298 { 299 return register_pernet_subsys(&ipv6_proc_ops); 300 } 301 302 void ipv6_misc_proc_exit(void) 303 { 304 unregister_pernet_subsys(&ipv6_proc_ops); 305 } 306 307