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/transp_v6.h> 31 #include <net/ipv6.h> 32 33 static struct proc_dir_entry *proc_net_devsnmp6; 34 35 static int fold_prot_inuse(struct proto *proto) 36 { 37 int res = 0; 38 int cpu; 39 40 for_each_possible_cpu(cpu) 41 res += proto->stats[cpu].inuse; 42 43 return res; 44 } 45 46 static int sockstat6_seq_show(struct seq_file *seq, void *v) 47 { 48 seq_printf(seq, "TCP6: inuse %d\n", 49 fold_prot_inuse(&tcpv6_prot)); 50 seq_printf(seq, "UDP6: inuse %d\n", 51 fold_prot_inuse(&udpv6_prot)); 52 seq_printf(seq, "UDPLITE6: inuse %d\n", 53 fold_prot_inuse(&udplitev6_prot)); 54 seq_printf(seq, "RAW6: inuse %d\n", 55 fold_prot_inuse(&rawv6_prot)); 56 seq_printf(seq, "FRAG6: inuse %d memory %d\n", 57 ip6_frag_nqueues(), ip6_frag_mem()); 58 return 0; 59 } 60 61 static struct snmp_mib snmp6_ipstats_list[] = { 62 /* ipv6 mib according to RFC 2465 */ 63 SNMP_MIB_ITEM("Ip6InReceives", IPSTATS_MIB_INRECEIVES), 64 SNMP_MIB_ITEM("Ip6InHdrErrors", IPSTATS_MIB_INHDRERRORS), 65 SNMP_MIB_ITEM("Ip6InTooBigErrors", IPSTATS_MIB_INTOOBIGERRORS), 66 SNMP_MIB_ITEM("Ip6InNoRoutes", IPSTATS_MIB_INNOROUTES), 67 SNMP_MIB_ITEM("Ip6InAddrErrors", IPSTATS_MIB_INADDRERRORS), 68 SNMP_MIB_ITEM("Ip6InUnknownProtos", IPSTATS_MIB_INUNKNOWNPROTOS), 69 SNMP_MIB_ITEM("Ip6InTruncatedPkts", IPSTATS_MIB_INTRUNCATEDPKTS), 70 SNMP_MIB_ITEM("Ip6InDiscards", IPSTATS_MIB_INDISCARDS), 71 SNMP_MIB_ITEM("Ip6InDelivers", IPSTATS_MIB_INDELIVERS), 72 SNMP_MIB_ITEM("Ip6OutForwDatagrams", IPSTATS_MIB_OUTFORWDATAGRAMS), 73 SNMP_MIB_ITEM("Ip6OutRequests", IPSTATS_MIB_OUTREQUESTS), 74 SNMP_MIB_ITEM("Ip6OutDiscards", IPSTATS_MIB_OUTDISCARDS), 75 SNMP_MIB_ITEM("Ip6OutNoRoutes", IPSTATS_MIB_OUTNOROUTES), 76 SNMP_MIB_ITEM("Ip6ReasmTimeout", IPSTATS_MIB_REASMTIMEOUT), 77 SNMP_MIB_ITEM("Ip6ReasmReqds", IPSTATS_MIB_REASMREQDS), 78 SNMP_MIB_ITEM("Ip6ReasmOKs", IPSTATS_MIB_REASMOKS), 79 SNMP_MIB_ITEM("Ip6ReasmFails", IPSTATS_MIB_REASMFAILS), 80 SNMP_MIB_ITEM("Ip6FragOKs", IPSTATS_MIB_FRAGOKS), 81 SNMP_MIB_ITEM("Ip6FragFails", IPSTATS_MIB_FRAGFAILS), 82 SNMP_MIB_ITEM("Ip6FragCreates", IPSTATS_MIB_FRAGCREATES), 83 SNMP_MIB_ITEM("Ip6InMcastPkts", IPSTATS_MIB_INMCASTPKTS), 84 SNMP_MIB_ITEM("Ip6OutMcastPkts", IPSTATS_MIB_OUTMCASTPKTS), 85 SNMP_MIB_SENTINEL 86 }; 87 88 static struct snmp_mib snmp6_icmp6_list[] = { 89 /* icmpv6 mib according to RFC 2466 */ 90 SNMP_MIB_ITEM("Icmp6InMsgs", ICMP6_MIB_INMSGS), 91 SNMP_MIB_ITEM("Icmp6InErrors", ICMP6_MIB_INERRORS), 92 SNMP_MIB_ITEM("Icmp6OutMsgs", ICMP6_MIB_OUTMSGS), 93 SNMP_MIB_SENTINEL 94 }; 95 96 /* RFC 4293 v6 ICMPMsgStatsTable; named items for RFC 2466 compatibility */ 97 static char *icmp6type2name[256] = { 98 [ICMPV6_DEST_UNREACH] = "DestUnreachs", 99 [ICMPV6_PKT_TOOBIG] = "PktTooBigs", 100 [ICMPV6_TIME_EXCEED] = "TimeExcds", 101 [ICMPV6_PARAMPROB] = "ParmProblems", 102 [ICMPV6_ECHO_REQUEST] = "EchoRequest", 103 [ICMPV6_ECHO_REPLY] = "EchoReplies", 104 [ICMPV6_MGM_QUERY] = "GroupMembQueries", 105 [ICMPV6_MGM_REPORT] = "GroupMembResponses", 106 [ICMPV6_MGM_REDUCTION] = "GroupMembReductions", 107 [ICMPV6_MLD2_REPORT] = "MLDv2Reports", 108 [NDISC_ROUTER_ADVERTISEMENT] = "RouterAdvertisements", 109 [NDISC_ROUTER_SOLICITATION] = "RouterSolicits", 110 [NDISC_NEIGHBOUR_ADVERTISEMENT] = "NeighborAdvertisements", 111 [NDISC_NEIGHBOUR_SOLICITATION] = "NeighborSolicits", 112 [NDISC_REDIRECT] = "NeighborRedirects", 113 }; 114 115 116 static struct snmp_mib snmp6_udp6_list[] = { 117 SNMP_MIB_ITEM("Udp6InDatagrams", UDP_MIB_INDATAGRAMS), 118 SNMP_MIB_ITEM("Udp6NoPorts", UDP_MIB_NOPORTS), 119 SNMP_MIB_ITEM("Udp6InErrors", UDP_MIB_INERRORS), 120 SNMP_MIB_ITEM("Udp6OutDatagrams", UDP_MIB_OUTDATAGRAMS), 121 SNMP_MIB_SENTINEL 122 }; 123 124 static struct snmp_mib snmp6_udplite6_list[] = { 125 SNMP_MIB_ITEM("UdpLite6InDatagrams", UDP_MIB_INDATAGRAMS), 126 SNMP_MIB_ITEM("UdpLite6NoPorts", UDP_MIB_NOPORTS), 127 SNMP_MIB_ITEM("UdpLite6InErrors", UDP_MIB_INERRORS), 128 SNMP_MIB_ITEM("UdpLite6OutDatagrams", UDP_MIB_OUTDATAGRAMS), 129 SNMP_MIB_SENTINEL 130 }; 131 132 static void snmp6_seq_show_icmpv6msg(struct seq_file *seq, void **mib) 133 { 134 static char name[32]; 135 int i; 136 137 /* print by name -- deprecated items */ 138 for (i = 0; i < ICMP6MSG_MIB_MAX; i++) { 139 int icmptype; 140 char *p; 141 142 icmptype = i & 0xff; 143 p = icmp6type2name[icmptype]; 144 if (!p) /* don't print un-named types here */ 145 continue; 146 (void) snprintf(name, sizeof(name)-1, "Icmp6%s%s", 147 i & 0x100 ? "Out" : "In", p); 148 seq_printf(seq, "%-32s\t%lu\n", name, 149 snmp_fold_field(mib, i)); 150 } 151 152 /* print by number (nonzero only) - ICMPMsgStat format */ 153 for (i = 0; i < ICMP6MSG_MIB_MAX; i++) { 154 unsigned long val; 155 156 val = snmp_fold_field(mib, i); 157 if (!val) 158 continue; 159 (void) snprintf(name, sizeof(name)-1, "Icmp6%sType%u", 160 i & 0x100 ? "Out" : "In", i & 0xff); 161 seq_printf(seq, "%-32s\t%lu\n", name, val); 162 } 163 return; 164 } 165 166 static inline void 167 snmp6_seq_show_item(struct seq_file *seq, void **mib, struct snmp_mib *itemlist) 168 { 169 int i; 170 for (i=0; itemlist[i].name; i++) 171 seq_printf(seq, "%-32s\t%lu\n", itemlist[i].name, 172 snmp_fold_field(mib, itemlist[i].entry)); 173 } 174 175 static int snmp6_seq_show(struct seq_file *seq, void *v) 176 { 177 struct inet6_dev *idev = (struct inet6_dev *)seq->private; 178 179 if (idev) { 180 seq_printf(seq, "%-32s\t%u\n", "ifIndex", idev->dev->ifindex); 181 snmp6_seq_show_item(seq, (void **)idev->stats.ipv6, snmp6_ipstats_list); 182 snmp6_seq_show_item(seq, (void **)idev->stats.icmpv6, snmp6_icmp6_list); 183 snmp6_seq_show_icmpv6msg(seq, (void **)idev->stats.icmpv6msg); 184 } else { 185 snmp6_seq_show_item(seq, (void **)ipv6_statistics, snmp6_ipstats_list); 186 snmp6_seq_show_item(seq, (void **)icmpv6_statistics, snmp6_icmp6_list); 187 snmp6_seq_show_icmpv6msg(seq, (void **)icmpv6msg_statistics); 188 snmp6_seq_show_item(seq, (void **)udp_stats_in6, snmp6_udp6_list); 189 snmp6_seq_show_item(seq, (void **)udplite_stats_in6, snmp6_udplite6_list); 190 } 191 return 0; 192 } 193 194 static int sockstat6_seq_open(struct inode *inode, struct file *file) 195 { 196 return single_open(file, sockstat6_seq_show, NULL); 197 } 198 199 static const struct file_operations sockstat6_seq_fops = { 200 .owner = THIS_MODULE, 201 .open = sockstat6_seq_open, 202 .read = seq_read, 203 .llseek = seq_lseek, 204 .release = single_release, 205 }; 206 207 static int snmp6_seq_open(struct inode *inode, struct file *file) 208 { 209 return single_open(file, snmp6_seq_show, PDE(inode)->data); 210 } 211 212 static const struct file_operations snmp6_seq_fops = { 213 .owner = THIS_MODULE, 214 .open = snmp6_seq_open, 215 .read = seq_read, 216 .llseek = seq_lseek, 217 .release = single_release, 218 }; 219 220 int snmp6_register_dev(struct inet6_dev *idev) 221 { 222 struct proc_dir_entry *p; 223 224 if (!idev || !idev->dev) 225 return -EINVAL; 226 227 if (!proc_net_devsnmp6) 228 return -ENOENT; 229 230 p = create_proc_entry(idev->dev->name, S_IRUGO, proc_net_devsnmp6); 231 if (!p) 232 return -ENOMEM; 233 234 p->data = idev; 235 p->proc_fops = &snmp6_seq_fops; 236 237 idev->stats.proc_dir_entry = p; 238 return 0; 239 } 240 241 int snmp6_unregister_dev(struct inet6_dev *idev) 242 { 243 if (!proc_net_devsnmp6) 244 return -ENOENT; 245 if (!idev || !idev->stats.proc_dir_entry) 246 return -EINVAL; 247 remove_proc_entry(idev->stats.proc_dir_entry->name, 248 proc_net_devsnmp6); 249 idev->stats.proc_dir_entry = NULL; 250 return 0; 251 } 252 253 int __init ipv6_misc_proc_init(void) 254 { 255 int rc = 0; 256 257 if (!proc_net_fops_create(&init_net, "snmp6", S_IRUGO, &snmp6_seq_fops)) 258 goto proc_snmp6_fail; 259 260 proc_net_devsnmp6 = proc_mkdir("dev_snmp6", init_net.proc_net); 261 if (!proc_net_devsnmp6) 262 goto proc_dev_snmp6_fail; 263 264 if (!proc_net_fops_create(&init_net, "sockstat6", S_IRUGO, &sockstat6_seq_fops)) 265 goto proc_sockstat6_fail; 266 out: 267 return rc; 268 269 proc_sockstat6_fail: 270 proc_net_remove(&init_net, "dev_snmp6"); 271 proc_dev_snmp6_fail: 272 proc_net_remove(&init_net, "snmp6"); 273 proc_snmp6_fail: 274 rc = -ENOMEM; 275 goto out; 276 } 277 278 void ipv6_misc_proc_exit(void) 279 { 280 proc_net_remove(&init_net, "sockstat6"); 281 proc_net_remove(&init_net, "dev_snmp6"); 282 proc_net_remove(&init_net, "snmp6"); 283 } 284 285