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 * Version: $Id: proc.c,v 1.17 2002/02/01 22:01:04 davem Exp $ 11 * 12 * Authors: David S. Miller (davem@caip.rutgers.edu) 13 * YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org> 14 * 15 * This program is free software; you can redistribute it and/or 16 * modify it under the terms of the GNU General Public License 17 * as published by the Free Software Foundation; either version 18 * 2 of the License, or (at your option) any later version. 19 */ 20 #include <linux/socket.h> 21 #include <linux/net.h> 22 #include <linux/ipv6.h> 23 #include <linux/proc_fs.h> 24 #include <linux/seq_file.h> 25 #include <linux/stddef.h> 26 #include <net/net_namespace.h> 27 #include <net/ip.h> 28 #include <net/sock.h> 29 #include <net/tcp.h> 30 #include <net/udp.h> 31 #include <net/transp_v6.h> 32 #include <net/ipv6.h> 33 34 static struct proc_dir_entry *proc_net_devsnmp6; 35 36 static int sockstat6_seq_show(struct seq_file *seq, void *v) 37 { 38 struct net *net = seq->private; 39 40 seq_printf(seq, "TCP6: inuse %d\n", 41 sock_prot_inuse_get(net, &tcpv6_prot)); 42 seq_printf(seq, "UDP6: inuse %d\n", 43 sock_prot_inuse_get(net, &udpv6_prot)); 44 seq_printf(seq, "UDPLITE6: inuse %d\n", 45 sock_prot_inuse_get(net, &udplitev6_prot)); 46 seq_printf(seq, "RAW6: inuse %d\n", 47 sock_prot_inuse_get(net, &rawv6_prot)); 48 seq_printf(seq, "FRAG6: inuse %d memory %d\n", 49 ip6_frag_nqueues(net), ip6_frag_mem(net)); 50 return 0; 51 } 52 53 static struct snmp_mib snmp6_ipstats_list[] = { 54 /* ipv6 mib according to RFC 2465 */ 55 SNMP_MIB_ITEM("Ip6InReceives", IPSTATS_MIB_INRECEIVES), 56 SNMP_MIB_ITEM("Ip6InHdrErrors", IPSTATS_MIB_INHDRERRORS), 57 SNMP_MIB_ITEM("Ip6InTooBigErrors", IPSTATS_MIB_INTOOBIGERRORS), 58 SNMP_MIB_ITEM("Ip6InNoRoutes", IPSTATS_MIB_INNOROUTES), 59 SNMP_MIB_ITEM("Ip6InAddrErrors", IPSTATS_MIB_INADDRERRORS), 60 SNMP_MIB_ITEM("Ip6InUnknownProtos", IPSTATS_MIB_INUNKNOWNPROTOS), 61 SNMP_MIB_ITEM("Ip6InTruncatedPkts", IPSTATS_MIB_INTRUNCATEDPKTS), 62 SNMP_MIB_ITEM("Ip6InDiscards", IPSTATS_MIB_INDISCARDS), 63 SNMP_MIB_ITEM("Ip6InDelivers", IPSTATS_MIB_INDELIVERS), 64 SNMP_MIB_ITEM("Ip6OutForwDatagrams", IPSTATS_MIB_OUTFORWDATAGRAMS), 65 SNMP_MIB_ITEM("Ip6OutRequests", IPSTATS_MIB_OUTREQUESTS), 66 SNMP_MIB_ITEM("Ip6OutDiscards", IPSTATS_MIB_OUTDISCARDS), 67 SNMP_MIB_ITEM("Ip6OutNoRoutes", IPSTATS_MIB_OUTNOROUTES), 68 SNMP_MIB_ITEM("Ip6ReasmTimeout", IPSTATS_MIB_REASMTIMEOUT), 69 SNMP_MIB_ITEM("Ip6ReasmReqds", IPSTATS_MIB_REASMREQDS), 70 SNMP_MIB_ITEM("Ip6ReasmOKs", IPSTATS_MIB_REASMOKS), 71 SNMP_MIB_ITEM("Ip6ReasmFails", IPSTATS_MIB_REASMFAILS), 72 SNMP_MIB_ITEM("Ip6FragOKs", IPSTATS_MIB_FRAGOKS), 73 SNMP_MIB_ITEM("Ip6FragFails", IPSTATS_MIB_FRAGFAILS), 74 SNMP_MIB_ITEM("Ip6FragCreates", IPSTATS_MIB_FRAGCREATES), 75 SNMP_MIB_ITEM("Ip6InMcastPkts", IPSTATS_MIB_INMCASTPKTS), 76 SNMP_MIB_ITEM("Ip6OutMcastPkts", IPSTATS_MIB_OUTMCASTPKTS), 77 SNMP_MIB_SENTINEL 78 }; 79 80 static struct snmp_mib snmp6_icmp6_list[] = { 81 /* icmpv6 mib according to RFC 2466 */ 82 SNMP_MIB_ITEM("Icmp6InMsgs", ICMP6_MIB_INMSGS), 83 SNMP_MIB_ITEM("Icmp6InErrors", ICMP6_MIB_INERRORS), 84 SNMP_MIB_ITEM("Icmp6OutMsgs", ICMP6_MIB_OUTMSGS), 85 SNMP_MIB_SENTINEL 86 }; 87 88 /* RFC 4293 v6 ICMPMsgStatsTable; named items for RFC 2466 compatibility */ 89 static char *icmp6type2name[256] = { 90 [ICMPV6_DEST_UNREACH] = "DestUnreachs", 91 [ICMPV6_PKT_TOOBIG] = "PktTooBigs", 92 [ICMPV6_TIME_EXCEED] = "TimeExcds", 93 [ICMPV6_PARAMPROB] = "ParmProblems", 94 [ICMPV6_ECHO_REQUEST] = "Echos", 95 [ICMPV6_ECHO_REPLY] = "EchoReplies", 96 [ICMPV6_MGM_QUERY] = "GroupMembQueries", 97 [ICMPV6_MGM_REPORT] = "GroupMembResponses", 98 [ICMPV6_MGM_REDUCTION] = "GroupMembReductions", 99 [ICMPV6_MLD2_REPORT] = "MLDv2Reports", 100 [NDISC_ROUTER_ADVERTISEMENT] = "RouterAdvertisements", 101 [NDISC_ROUTER_SOLICITATION] = "RouterSolicits", 102 [NDISC_NEIGHBOUR_ADVERTISEMENT] = "NeighborAdvertisements", 103 [NDISC_NEIGHBOUR_SOLICITATION] = "NeighborSolicits", 104 [NDISC_REDIRECT] = "Redirects", 105 }; 106 107 108 static struct snmp_mib snmp6_udp6_list[] = { 109 SNMP_MIB_ITEM("Udp6InDatagrams", UDP_MIB_INDATAGRAMS), 110 SNMP_MIB_ITEM("Udp6NoPorts", UDP_MIB_NOPORTS), 111 SNMP_MIB_ITEM("Udp6InErrors", UDP_MIB_INERRORS), 112 SNMP_MIB_ITEM("Udp6OutDatagrams", UDP_MIB_OUTDATAGRAMS), 113 SNMP_MIB_SENTINEL 114 }; 115 116 static struct snmp_mib snmp6_udplite6_list[] = { 117 SNMP_MIB_ITEM("UdpLite6InDatagrams", UDP_MIB_INDATAGRAMS), 118 SNMP_MIB_ITEM("UdpLite6NoPorts", UDP_MIB_NOPORTS), 119 SNMP_MIB_ITEM("UdpLite6InErrors", UDP_MIB_INERRORS), 120 SNMP_MIB_ITEM("UdpLite6OutDatagrams", UDP_MIB_OUTDATAGRAMS), 121 SNMP_MIB_SENTINEL 122 }; 123 124 static void snmp6_seq_show_icmpv6msg(struct seq_file *seq, void **mib) 125 { 126 static char name[32]; 127 int i; 128 129 /* print by name -- deprecated items */ 130 for (i = 0; i < ICMP6MSG_MIB_MAX; i++) { 131 int icmptype; 132 char *p; 133 134 icmptype = i & 0xff; 135 p = icmp6type2name[icmptype]; 136 if (!p) /* don't print un-named types here */ 137 continue; 138 (void) snprintf(name, sizeof(name)-1, "Icmp6%s%s", 139 i & 0x100 ? "Out" : "In", p); 140 seq_printf(seq, "%-32s\t%lu\n", name, 141 snmp_fold_field(mib, i)); 142 } 143 144 /* print by number (nonzero only) - ICMPMsgStat format */ 145 for (i = 0; i < ICMP6MSG_MIB_MAX; i++) { 146 unsigned long val; 147 148 val = snmp_fold_field(mib, i); 149 if (!val) 150 continue; 151 (void) snprintf(name, sizeof(name)-1, "Icmp6%sType%u", 152 i & 0x100 ? "Out" : "In", i & 0xff); 153 seq_printf(seq, "%-32s\t%lu\n", name, val); 154 } 155 return; 156 } 157 158 static inline void 159 snmp6_seq_show_item(struct seq_file *seq, void **mib, struct snmp_mib *itemlist) 160 { 161 int i; 162 for (i=0; itemlist[i].name; i++) 163 seq_printf(seq, "%-32s\t%lu\n", itemlist[i].name, 164 snmp_fold_field(mib, itemlist[i].entry)); 165 } 166 167 static int snmp6_seq_show(struct seq_file *seq, void *v) 168 { 169 struct inet6_dev *idev = (struct inet6_dev *)seq->private; 170 171 if (idev) { 172 seq_printf(seq, "%-32s\t%u\n", "ifIndex", idev->dev->ifindex); 173 snmp6_seq_show_item(seq, (void **)idev->stats.ipv6, snmp6_ipstats_list); 174 snmp6_seq_show_item(seq, (void **)idev->stats.icmpv6, snmp6_icmp6_list); 175 snmp6_seq_show_icmpv6msg(seq, (void **)idev->stats.icmpv6msg); 176 } else { 177 snmp6_seq_show_item(seq, (void **)ipv6_statistics, snmp6_ipstats_list); 178 snmp6_seq_show_item(seq, (void **)icmpv6_statistics, snmp6_icmp6_list); 179 snmp6_seq_show_icmpv6msg(seq, (void **)icmpv6msg_statistics); 180 snmp6_seq_show_item(seq, (void **)udp_stats_in6, snmp6_udp6_list); 181 snmp6_seq_show_item(seq, (void **)udplite_stats_in6, snmp6_udplite6_list); 182 } 183 return 0; 184 } 185 186 static int sockstat6_seq_open(struct inode *inode, struct file *file) 187 { 188 int err; 189 struct net *net; 190 191 err = -ENXIO; 192 net = get_proc_net(inode); 193 if (net == NULL) 194 goto err_net; 195 196 err = single_open(file, sockstat6_seq_show, net); 197 if (err < 0) 198 goto err_open; 199 200 return 0; 201 202 err_open: 203 put_net(net); 204 err_net: 205 return err; 206 } 207 208 static int sockstat6_seq_release(struct inode *inode, struct file *file) 209 { 210 struct net *net = ((struct seq_file *)file->private_data)->private; 211 212 put_net(net); 213 return single_release(inode, file); 214 } 215 216 static const struct file_operations sockstat6_seq_fops = { 217 .owner = THIS_MODULE, 218 .open = sockstat6_seq_open, 219 .read = seq_read, 220 .llseek = seq_lseek, 221 .release = sockstat6_seq_release, 222 }; 223 224 static int snmp6_seq_open(struct inode *inode, struct file *file) 225 { 226 return single_open(file, snmp6_seq_show, PDE(inode)->data); 227 } 228 229 static const struct file_operations snmp6_seq_fops = { 230 .owner = THIS_MODULE, 231 .open = snmp6_seq_open, 232 .read = seq_read, 233 .llseek = seq_lseek, 234 .release = single_release, 235 }; 236 237 int snmp6_register_dev(struct inet6_dev *idev) 238 { 239 struct proc_dir_entry *p; 240 241 if (!idev || !idev->dev) 242 return -EINVAL; 243 244 if (dev_net(idev->dev) != &init_net) 245 return 0; 246 247 if (!proc_net_devsnmp6) 248 return -ENOENT; 249 250 p = proc_create_data(idev->dev->name, S_IRUGO, 251 proc_net_devsnmp6, &snmp6_seq_fops, idev); 252 if (!p) 253 return -ENOMEM; 254 255 idev->stats.proc_dir_entry = p; 256 return 0; 257 } 258 259 int snmp6_unregister_dev(struct inet6_dev *idev) 260 { 261 if (!proc_net_devsnmp6) 262 return -ENOENT; 263 if (!idev || !idev->stats.proc_dir_entry) 264 return -EINVAL; 265 remove_proc_entry(idev->stats.proc_dir_entry->name, 266 proc_net_devsnmp6); 267 idev->stats.proc_dir_entry = NULL; 268 return 0; 269 } 270 271 static int ipv6_proc_init_net(struct net *net) 272 { 273 if (!proc_net_fops_create(net, "sockstat6", S_IRUGO, 274 &sockstat6_seq_fops)) 275 return -ENOMEM; 276 return 0; 277 } 278 279 static void ipv6_proc_exit_net(struct net *net) 280 { 281 proc_net_remove(net, "sockstat6"); 282 } 283 284 static struct pernet_operations ipv6_proc_ops = { 285 .init = ipv6_proc_init_net, 286 .exit = ipv6_proc_exit_net, 287 }; 288 289 int __init ipv6_misc_proc_init(void) 290 { 291 int rc = 0; 292 293 if (register_pernet_subsys(&ipv6_proc_ops)) 294 goto proc_net_fail; 295 296 if (!proc_net_fops_create(&init_net, "snmp6", S_IRUGO, &snmp6_seq_fops)) 297 goto proc_snmp6_fail; 298 299 proc_net_devsnmp6 = proc_mkdir("dev_snmp6", init_net.proc_net); 300 if (!proc_net_devsnmp6) 301 goto proc_dev_snmp6_fail; 302 out: 303 return rc; 304 305 proc_dev_snmp6_fail: 306 proc_net_remove(&init_net, "snmp6"); 307 proc_snmp6_fail: 308 unregister_pernet_subsys(&ipv6_proc_ops); 309 proc_net_fail: 310 rc = -ENOMEM; 311 goto out; 312 } 313 314 void ipv6_misc_proc_exit(void) 315 { 316 proc_net_remove(&init_net, "sockstat6"); 317 proc_net_remove(&init_net, "dev_snmp6"); 318 proc_net_remove(&init_net, "snmp6"); 319 unregister_pernet_subsys(&ipv6_proc_ops); 320 } 321 322