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 #endif /* CONFIG_PROC_FS */ 145 146 static unsigned long 147 fold_field(void *mib[], int offt) 148 { 149 unsigned long res = 0; 150 int i; 151 152 for_each_possible_cpu(i) { 153 res += *(((unsigned long *)per_cpu_ptr(mib[0], i)) + offt); 154 res += *(((unsigned long *)per_cpu_ptr(mib[1], i)) + offt); 155 } 156 return res; 157 } 158 159 #ifdef CONFIG_PROC_FS 160 static inline void 161 snmp6_seq_show_item(struct seq_file *seq, void **mib, struct snmp_mib *itemlist) 162 { 163 int i; 164 for (i=0; itemlist[i].name; i++) 165 seq_printf(seq, "%-32s\t%lu\n", itemlist[i].name, 166 fold_field(mib, itemlist[i].entry)); 167 } 168 169 static int snmp6_seq_show(struct seq_file *seq, void *v) 170 { 171 struct inet6_dev *idev = (struct inet6_dev *)seq->private; 172 173 if (idev) { 174 seq_printf(seq, "%-32s\t%u\n", "ifIndex", idev->dev->ifindex); 175 snmp6_seq_show_item(seq, (void **)idev->stats.ipv6, snmp6_ipstats_list); 176 snmp6_seq_show_item(seq, (void **)idev->stats.icmpv6, snmp6_icmp6_list); 177 } else { 178 snmp6_seq_show_item(seq, (void **)ipv6_statistics, snmp6_ipstats_list); 179 snmp6_seq_show_item(seq, (void **)icmpv6_statistics, snmp6_icmp6_list); 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 return single_open(file, sockstat6_seq_show, NULL); 189 } 190 191 static const struct file_operations sockstat6_seq_fops = { 192 .owner = THIS_MODULE, 193 .open = sockstat6_seq_open, 194 .read = seq_read, 195 .llseek = seq_lseek, 196 .release = single_release, 197 }; 198 199 static int snmp6_seq_open(struct inode *inode, struct file *file) 200 { 201 return single_open(file, snmp6_seq_show, PDE(inode)->data); 202 } 203 204 static const struct file_operations snmp6_seq_fops = { 205 .owner = THIS_MODULE, 206 .open = snmp6_seq_open, 207 .read = seq_read, 208 .llseek = seq_lseek, 209 .release = single_release, 210 }; 211 #endif /* CONFIG_PROC_FS */ 212 213 static inline void 214 __snmp6_fill_stats(u64 *stats, void **mib, int items, int bytes) 215 { 216 int i; 217 int pad = bytes - sizeof(u64) * items; 218 BUG_ON(pad < 0); 219 stats[0] = items; 220 for (i = 1; i < items; i++) 221 stats[i] = (u64)fold_field(mib, i); 222 memset(&stats[items], 0, pad); 223 } 224 225 void 226 snmp6_fill_stats(u64 *stats, struct inet6_dev *idev, int attrtype, int bytes) 227 { 228 switch(attrtype) { 229 case IFLA_INET6_STATS: 230 __snmp6_fill_stats(stats, (void **)idev->stats.ipv6, IPSTATS_MIB_MAX, bytes); 231 break; 232 case IFLA_INET6_ICMP6STATS: 233 __snmp6_fill_stats(stats, (void **)idev->stats.icmpv6, ICMP6_MIB_MAX, bytes); 234 break; 235 } 236 } 237 238 #ifdef CONFIG_PROC_FS 239 int snmp6_register_dev(struct inet6_dev *idev) 240 { 241 struct proc_dir_entry *p; 242 243 if (!idev || !idev->dev) 244 return -EINVAL; 245 246 if (!proc_net_devsnmp6) 247 return -ENOENT; 248 249 p = create_proc_entry(idev->dev->name, S_IRUGO, proc_net_devsnmp6); 250 if (!p) 251 return -ENOMEM; 252 253 p->data = idev; 254 p->proc_fops = &snmp6_seq_fops; 255 256 idev->stats.proc_dir_entry = p; 257 return 0; 258 } 259 260 int snmp6_unregister_dev(struct inet6_dev *idev) 261 { 262 if (!proc_net_devsnmp6) 263 return -ENOENT; 264 if (!idev || !idev->stats.proc_dir_entry) 265 return -EINVAL; 266 remove_proc_entry(idev->stats.proc_dir_entry->name, 267 proc_net_devsnmp6); 268 return 0; 269 } 270 271 int __init ipv6_misc_proc_init(void) 272 { 273 int rc = 0; 274 275 if (!proc_net_fops_create("snmp6", S_IRUGO, &snmp6_seq_fops)) 276 goto proc_snmp6_fail; 277 278 proc_net_devsnmp6 = proc_mkdir("dev_snmp6", proc_net); 279 if (!proc_net_devsnmp6) 280 goto proc_dev_snmp6_fail; 281 282 if (!proc_net_fops_create("sockstat6", S_IRUGO, &sockstat6_seq_fops)) 283 goto proc_sockstat6_fail; 284 out: 285 return rc; 286 287 proc_sockstat6_fail: 288 proc_net_remove("dev_snmp6"); 289 proc_dev_snmp6_fail: 290 proc_net_remove("snmp6"); 291 proc_snmp6_fail: 292 rc = -ENOMEM; 293 goto out; 294 } 295 296 void ipv6_misc_proc_exit(void) 297 { 298 proc_net_remove("sockstat6"); 299 proc_net_remove("dev_snmp6"); 300 proc_net_remove("snmp6"); 301 } 302 303 #else /* CONFIG_PROC_FS */ 304 305 306 int snmp6_register_dev(struct inet6_dev *idev) 307 { 308 return 0; 309 } 310 311 int snmp6_unregister_dev(struct inet6_dev *idev) 312 { 313 return 0; 314 } 315 316 #endif /* CONFIG_PROC_FS */ 317 318 int snmp6_alloc_dev(struct inet6_dev *idev) 319 { 320 int err = -ENOMEM; 321 322 if (!idev || !idev->dev) 323 return -EINVAL; 324 325 if (snmp6_mib_init((void **)idev->stats.ipv6, sizeof(struct ipstats_mib), 326 __alignof__(struct ipstats_mib)) < 0) 327 goto err_ip; 328 if (snmp6_mib_init((void **)idev->stats.icmpv6, sizeof(struct icmpv6_mib), 329 __alignof__(struct icmpv6_mib)) < 0) 330 goto err_icmp; 331 332 return 0; 333 334 err_icmp: 335 snmp6_mib_free((void **)idev->stats.ipv6); 336 err_ip: 337 return err; 338 } 339 340 int snmp6_free_dev(struct inet6_dev *idev) 341 { 342 snmp6_mib_free((void **)idev->stats.icmpv6); 343 snmp6_mib_free((void **)idev->stats.ipv6); 344 return 0; 345 } 346 347 int snmp6_mib_init(void *ptr[2], size_t mibsize, size_t mibalign) 348 { 349 if (ptr == NULL) 350 return -EINVAL; 351 352 ptr[0] = __alloc_percpu(mibsize); 353 if (!ptr[0]) 354 goto err0; 355 356 ptr[1] = __alloc_percpu(mibsize); 357 if (!ptr[1]) 358 goto err1; 359 360 return 0; 361 362 err1: 363 free_percpu(ptr[0]); 364 ptr[0] = NULL; 365 err0: 366 return -ENOMEM; 367 } 368 369 void snmp6_mib_free(void *ptr[2]) 370 { 371 if (ptr == NULL) 372 return; 373 free_percpu(ptr[0]); 374 free_percpu(ptr[1]); 375 ptr[0] = ptr[1] = NULL; 376 } 377 378