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/sock.h> 27 #include <net/tcp.h> 28 #include <net/transp_v6.h> 29 #include <net/ipv6.h> 30 31 #ifdef CONFIG_PROC_FS 32 static struct proc_dir_entry *proc_net_devsnmp6; 33 34 static int fold_prot_inuse(struct proto *proto) 35 { 36 int res = 0; 37 int cpu; 38 39 for_each_possible_cpu(cpu) 40 res += proto->stats[cpu].inuse; 41 42 return res; 43 } 44 45 static int sockstat6_seq_show(struct seq_file *seq, void *v) 46 { 47 seq_printf(seq, "TCP6: inuse %d\n", 48 fold_prot_inuse(&tcpv6_prot)); 49 seq_printf(seq, "UDP6: inuse %d\n", 50 fold_prot_inuse(&udpv6_prot)); 51 seq_printf(seq, "UDPLITE6: inuse %d\n", 52 fold_prot_inuse(&udplitev6_prot)); 53 seq_printf(seq, "RAW6: inuse %d\n", 54 fold_prot_inuse(&rawv6_prot)); 55 seq_printf(seq, "FRAG6: inuse %d memory %d\n", 56 ip6_frag_nqueues, atomic_read(&ip6_frag_mem)); 57 return 0; 58 } 59 60 static struct snmp_mib snmp6_ipstats_list[] = { 61 /* ipv6 mib according to RFC 2465 */ 62 SNMP_MIB_ITEM("Ip6InReceives", IPSTATS_MIB_INRECEIVES), 63 SNMP_MIB_ITEM("Ip6InHdrErrors", IPSTATS_MIB_INHDRERRORS), 64 SNMP_MIB_ITEM("Ip6InTooBigErrors", IPSTATS_MIB_INTOOBIGERRORS), 65 SNMP_MIB_ITEM("Ip6InNoRoutes", IPSTATS_MIB_INNOROUTES), 66 SNMP_MIB_ITEM("Ip6InAddrErrors", IPSTATS_MIB_INADDRERRORS), 67 SNMP_MIB_ITEM("Ip6InUnknownProtos", IPSTATS_MIB_INUNKNOWNPROTOS), 68 SNMP_MIB_ITEM("Ip6InTruncatedPkts", IPSTATS_MIB_INTRUNCATEDPKTS), 69 SNMP_MIB_ITEM("Ip6InDiscards", IPSTATS_MIB_INDISCARDS), 70 SNMP_MIB_ITEM("Ip6InDelivers", IPSTATS_MIB_INDELIVERS), 71 SNMP_MIB_ITEM("Ip6OutForwDatagrams", IPSTATS_MIB_OUTFORWDATAGRAMS), 72 SNMP_MIB_ITEM("Ip6OutRequests", IPSTATS_MIB_OUTREQUESTS), 73 SNMP_MIB_ITEM("Ip6OutDiscards", IPSTATS_MIB_OUTDISCARDS), 74 SNMP_MIB_ITEM("Ip6OutNoRoutes", IPSTATS_MIB_OUTNOROUTES), 75 SNMP_MIB_ITEM("Ip6ReasmTimeout", IPSTATS_MIB_REASMTIMEOUT), 76 SNMP_MIB_ITEM("Ip6ReasmReqds", IPSTATS_MIB_REASMREQDS), 77 SNMP_MIB_ITEM("Ip6ReasmOKs", IPSTATS_MIB_REASMOKS), 78 SNMP_MIB_ITEM("Ip6ReasmFails", IPSTATS_MIB_REASMFAILS), 79 SNMP_MIB_ITEM("Ip6FragOKs", IPSTATS_MIB_FRAGOKS), 80 SNMP_MIB_ITEM("Ip6FragFails", IPSTATS_MIB_FRAGFAILS), 81 SNMP_MIB_ITEM("Ip6FragCreates", IPSTATS_MIB_FRAGCREATES), 82 SNMP_MIB_ITEM("Ip6InMcastPkts", IPSTATS_MIB_INMCASTPKTS), 83 SNMP_MIB_ITEM("Ip6OutMcastPkts", IPSTATS_MIB_OUTMCASTPKTS), 84 SNMP_MIB_SENTINEL 85 }; 86 87 static struct snmp_mib snmp6_icmp6_list[] = { 88 /* icmpv6 mib according to RFC 2466 89 90 Exceptions: {In|Out}AdminProhibs are removed, because I see 91 no good reasons to account them separately 92 of another dest.unreachs. 93 OutErrs is zero identically. 94 OutEchos too. 95 OutRouterAdvertisements too. 96 OutGroupMembQueries too. 97 */ 98 SNMP_MIB_ITEM("Icmp6InMsgs", ICMP6_MIB_INMSGS), 99 SNMP_MIB_ITEM("Icmp6InErrors", ICMP6_MIB_INERRORS), 100 SNMP_MIB_ITEM("Icmp6InDestUnreachs", ICMP6_MIB_INDESTUNREACHS), 101 SNMP_MIB_ITEM("Icmp6InPktTooBigs", ICMP6_MIB_INPKTTOOBIGS), 102 SNMP_MIB_ITEM("Icmp6InTimeExcds", ICMP6_MIB_INTIMEEXCDS), 103 SNMP_MIB_ITEM("Icmp6InParmProblems", ICMP6_MIB_INPARMPROBLEMS), 104 SNMP_MIB_ITEM("Icmp6InEchos", ICMP6_MIB_INECHOS), 105 SNMP_MIB_ITEM("Icmp6InEchoReplies", ICMP6_MIB_INECHOREPLIES), 106 SNMP_MIB_ITEM("Icmp6InGroupMembQueries", ICMP6_MIB_INGROUPMEMBQUERIES), 107 SNMP_MIB_ITEM("Icmp6InGroupMembResponses", ICMP6_MIB_INGROUPMEMBRESPONSES), 108 SNMP_MIB_ITEM("Icmp6InGroupMembReductions", ICMP6_MIB_INGROUPMEMBREDUCTIONS), 109 SNMP_MIB_ITEM("Icmp6InRouterSolicits", ICMP6_MIB_INROUTERSOLICITS), 110 SNMP_MIB_ITEM("Icmp6InRouterAdvertisements", ICMP6_MIB_INROUTERADVERTISEMENTS), 111 SNMP_MIB_ITEM("Icmp6InNeighborSolicits", ICMP6_MIB_INNEIGHBORSOLICITS), 112 SNMP_MIB_ITEM("Icmp6InNeighborAdvertisements", ICMP6_MIB_INNEIGHBORADVERTISEMENTS), 113 SNMP_MIB_ITEM("Icmp6InRedirects", ICMP6_MIB_INREDIRECTS), 114 SNMP_MIB_ITEM("Icmp6OutMsgs", ICMP6_MIB_OUTMSGS), 115 SNMP_MIB_ITEM("Icmp6OutDestUnreachs", ICMP6_MIB_OUTDESTUNREACHS), 116 SNMP_MIB_ITEM("Icmp6OutPktTooBigs", ICMP6_MIB_OUTPKTTOOBIGS), 117 SNMP_MIB_ITEM("Icmp6OutTimeExcds", ICMP6_MIB_OUTTIMEEXCDS), 118 SNMP_MIB_ITEM("Icmp6OutParmProblems", ICMP6_MIB_OUTPARMPROBLEMS), 119 SNMP_MIB_ITEM("Icmp6OutEchoReplies", ICMP6_MIB_OUTECHOREPLIES), 120 SNMP_MIB_ITEM("Icmp6OutRouterSolicits", ICMP6_MIB_OUTROUTERSOLICITS), 121 SNMP_MIB_ITEM("Icmp6OutNeighborSolicits", ICMP6_MIB_OUTNEIGHBORSOLICITS), 122 SNMP_MIB_ITEM("Icmp6OutNeighborAdvertisements", ICMP6_MIB_OUTNEIGHBORADVERTISEMENTS), 123 SNMP_MIB_ITEM("Icmp6OutRedirects", ICMP6_MIB_OUTREDIRECTS), 124 SNMP_MIB_ITEM("Icmp6OutGroupMembResponses", ICMP6_MIB_OUTGROUPMEMBRESPONSES), 125 SNMP_MIB_ITEM("Icmp6OutGroupMembReductions", ICMP6_MIB_OUTGROUPMEMBREDUCTIONS), 126 SNMP_MIB_SENTINEL 127 }; 128 129 static struct snmp_mib snmp6_udp6_list[] = { 130 SNMP_MIB_ITEM("Udp6InDatagrams", UDP_MIB_INDATAGRAMS), 131 SNMP_MIB_ITEM("Udp6NoPorts", UDP_MIB_NOPORTS), 132 SNMP_MIB_ITEM("Udp6InErrors", UDP_MIB_INERRORS), 133 SNMP_MIB_ITEM("Udp6OutDatagrams", UDP_MIB_OUTDATAGRAMS), 134 SNMP_MIB_SENTINEL 135 }; 136 137 static struct snmp_mib snmp6_udplite6_list[] = { 138 SNMP_MIB_ITEM("UdpLite6InDatagrams", UDP_MIB_INDATAGRAMS), 139 SNMP_MIB_ITEM("UdpLite6NoPorts", UDP_MIB_NOPORTS), 140 SNMP_MIB_ITEM("UdpLite6InErrors", UDP_MIB_INERRORS), 141 SNMP_MIB_ITEM("UdpLite6OutDatagrams", UDP_MIB_OUTDATAGRAMS), 142 SNMP_MIB_SENTINEL 143 }; 144 145 static unsigned long 146 fold_field(void *mib[], int offt) 147 { 148 unsigned long res = 0; 149 int i; 150 151 for_each_possible_cpu(i) { 152 res += *(((unsigned long *)per_cpu_ptr(mib[0], i)) + offt); 153 res += *(((unsigned long *)per_cpu_ptr(mib[1], i)) + offt); 154 } 155 return res; 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 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 } else { 176 snmp6_seq_show_item(seq, (void **)ipv6_statistics, snmp6_ipstats_list); 177 snmp6_seq_show_item(seq, (void **)icmpv6_statistics, snmp6_icmp6_list); 178 snmp6_seq_show_item(seq, (void **)udp_stats_in6, snmp6_udp6_list); 179 snmp6_seq_show_item(seq, (void **)udplite_stats_in6, snmp6_udplite6_list); 180 } 181 return 0; 182 } 183 184 static int sockstat6_seq_open(struct inode *inode, struct file *file) 185 { 186 return single_open(file, sockstat6_seq_show, NULL); 187 } 188 189 static const struct file_operations sockstat6_seq_fops = { 190 .owner = THIS_MODULE, 191 .open = sockstat6_seq_open, 192 .read = seq_read, 193 .llseek = seq_lseek, 194 .release = single_release, 195 }; 196 197 static int snmp6_seq_open(struct inode *inode, struct file *file) 198 { 199 return single_open(file, snmp6_seq_show, PDE(inode)->data); 200 } 201 202 static const struct file_operations snmp6_seq_fops = { 203 .owner = THIS_MODULE, 204 .open = snmp6_seq_open, 205 .read = seq_read, 206 .llseek = seq_lseek, 207 .release = single_release, 208 }; 209 210 int snmp6_register_dev(struct inet6_dev *idev) 211 { 212 struct proc_dir_entry *p; 213 214 if (!idev || !idev->dev) 215 return -EINVAL; 216 217 if (!proc_net_devsnmp6) 218 return -ENOENT; 219 220 p = create_proc_entry(idev->dev->name, S_IRUGO, proc_net_devsnmp6); 221 if (!p) 222 return -ENOMEM; 223 224 p->data = idev; 225 p->proc_fops = &snmp6_seq_fops; 226 227 idev->stats.proc_dir_entry = p; 228 return 0; 229 } 230 231 int snmp6_unregister_dev(struct inet6_dev *idev) 232 { 233 if (!proc_net_devsnmp6) 234 return -ENOENT; 235 if (!idev || !idev->stats.proc_dir_entry) 236 return -EINVAL; 237 remove_proc_entry(idev->stats.proc_dir_entry->name, 238 proc_net_devsnmp6); 239 return 0; 240 } 241 242 int __init ipv6_misc_proc_init(void) 243 { 244 int rc = 0; 245 246 if (!proc_net_fops_create("snmp6", S_IRUGO, &snmp6_seq_fops)) 247 goto proc_snmp6_fail; 248 249 proc_net_devsnmp6 = proc_mkdir("dev_snmp6", proc_net); 250 if (!proc_net_devsnmp6) 251 goto proc_dev_snmp6_fail; 252 253 if (!proc_net_fops_create("sockstat6", S_IRUGO, &sockstat6_seq_fops)) 254 goto proc_sockstat6_fail; 255 out: 256 return rc; 257 258 proc_sockstat6_fail: 259 proc_net_remove("dev_snmp6"); 260 proc_dev_snmp6_fail: 261 proc_net_remove("snmp6"); 262 proc_snmp6_fail: 263 rc = -ENOMEM; 264 goto out; 265 } 266 267 void ipv6_misc_proc_exit(void) 268 { 269 proc_net_remove("sockstat6"); 270 proc_net_remove("dev_snmp6"); 271 proc_net_remove("snmp6"); 272 } 273 274 #else /* CONFIG_PROC_FS */ 275 276 277 int snmp6_register_dev(struct inet6_dev *idev) 278 { 279 return 0; 280 } 281 282 int snmp6_unregister_dev(struct inet6_dev *idev) 283 { 284 return 0; 285 } 286 #endif /* CONFIG_PROC_FS */ 287 288 int snmp6_alloc_dev(struct inet6_dev *idev) 289 { 290 int err = -ENOMEM; 291 292 if (!idev || !idev->dev) 293 return -EINVAL; 294 295 if (snmp6_mib_init((void **)idev->stats.ipv6, sizeof(struct ipstats_mib), 296 __alignof__(struct ipstats_mib)) < 0) 297 goto err_ip; 298 if (snmp6_mib_init((void **)idev->stats.icmpv6, sizeof(struct icmpv6_mib), 299 __alignof__(struct icmpv6_mib)) < 0) 300 goto err_icmp; 301 302 return 0; 303 304 err_icmp: 305 snmp6_mib_free((void **)idev->stats.ipv6); 306 err_ip: 307 return err; 308 } 309 310 int snmp6_free_dev(struct inet6_dev *idev) 311 { 312 snmp6_mib_free((void **)idev->stats.icmpv6); 313 snmp6_mib_free((void **)idev->stats.ipv6); 314 return 0; 315 } 316 317 318