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 <asm/unaligned.h> 27 #include <net/sock.h> 28 #include <net/tcp.h> 29 #include <net/transp_v6.h> 30 #include <net/ipv6.h> 31 32 #ifdef CONFIG_PROC_FS 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, atomic_read(&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 91 Exceptions: {In|Out}AdminProhibs are removed, because I see 92 no good reasons to account them separately 93 of another dest.unreachs. 94 OutErrs is zero identically. 95 OutEchos too. 96 OutRouterAdvertisements too. 97 OutGroupMembQueries too. 98 */ 99 SNMP_MIB_ITEM("Icmp6InMsgs", ICMP6_MIB_INMSGS), 100 SNMP_MIB_ITEM("Icmp6InErrors", ICMP6_MIB_INERRORS), 101 SNMP_MIB_ITEM("Icmp6InDestUnreachs", ICMP6_MIB_INDESTUNREACHS), 102 SNMP_MIB_ITEM("Icmp6InPktTooBigs", ICMP6_MIB_INPKTTOOBIGS), 103 SNMP_MIB_ITEM("Icmp6InTimeExcds", ICMP6_MIB_INTIMEEXCDS), 104 SNMP_MIB_ITEM("Icmp6InParmProblems", ICMP6_MIB_INPARMPROBLEMS), 105 SNMP_MIB_ITEM("Icmp6InEchos", ICMP6_MIB_INECHOS), 106 SNMP_MIB_ITEM("Icmp6InEchoReplies", ICMP6_MIB_INECHOREPLIES), 107 SNMP_MIB_ITEM("Icmp6InGroupMembQueries", ICMP6_MIB_INGROUPMEMBQUERIES), 108 SNMP_MIB_ITEM("Icmp6InGroupMembResponses", ICMP6_MIB_INGROUPMEMBRESPONSES), 109 SNMP_MIB_ITEM("Icmp6InGroupMembReductions", ICMP6_MIB_INGROUPMEMBREDUCTIONS), 110 SNMP_MIB_ITEM("Icmp6InRouterSolicits", ICMP6_MIB_INROUTERSOLICITS), 111 SNMP_MIB_ITEM("Icmp6InRouterAdvertisements", ICMP6_MIB_INROUTERADVERTISEMENTS), 112 SNMP_MIB_ITEM("Icmp6InNeighborSolicits", ICMP6_MIB_INNEIGHBORSOLICITS), 113 SNMP_MIB_ITEM("Icmp6InNeighborAdvertisements", ICMP6_MIB_INNEIGHBORADVERTISEMENTS), 114 SNMP_MIB_ITEM("Icmp6InRedirects", ICMP6_MIB_INREDIRECTS), 115 SNMP_MIB_ITEM("Icmp6OutMsgs", ICMP6_MIB_OUTMSGS), 116 SNMP_MIB_ITEM("Icmp6OutDestUnreachs", ICMP6_MIB_OUTDESTUNREACHS), 117 SNMP_MIB_ITEM("Icmp6OutPktTooBigs", ICMP6_MIB_OUTPKTTOOBIGS), 118 SNMP_MIB_ITEM("Icmp6OutTimeExcds", ICMP6_MIB_OUTTIMEEXCDS), 119 SNMP_MIB_ITEM("Icmp6OutParmProblems", ICMP6_MIB_OUTPARMPROBLEMS), 120 SNMP_MIB_ITEM("Icmp6OutEchoReplies", ICMP6_MIB_OUTECHOREPLIES), 121 SNMP_MIB_ITEM("Icmp6OutRouterSolicits", ICMP6_MIB_OUTROUTERSOLICITS), 122 SNMP_MIB_ITEM("Icmp6OutNeighborSolicits", ICMP6_MIB_OUTNEIGHBORSOLICITS), 123 SNMP_MIB_ITEM("Icmp6OutNeighborAdvertisements", ICMP6_MIB_OUTNEIGHBORADVERTISEMENTS), 124 SNMP_MIB_ITEM("Icmp6OutRedirects", ICMP6_MIB_OUTREDIRECTS), 125 SNMP_MIB_ITEM("Icmp6OutGroupMembResponses", ICMP6_MIB_OUTGROUPMEMBRESPONSES), 126 SNMP_MIB_ITEM("Icmp6OutGroupMembReductions", ICMP6_MIB_OUTGROUPMEMBREDUCTIONS), 127 SNMP_MIB_SENTINEL 128 }; 129 130 static struct snmp_mib snmp6_udp6_list[] = { 131 SNMP_MIB_ITEM("Udp6InDatagrams", UDP_MIB_INDATAGRAMS), 132 SNMP_MIB_ITEM("Udp6NoPorts", UDP_MIB_NOPORTS), 133 SNMP_MIB_ITEM("Udp6InErrors", UDP_MIB_INERRORS), 134 SNMP_MIB_ITEM("Udp6OutDatagrams", UDP_MIB_OUTDATAGRAMS), 135 SNMP_MIB_SENTINEL 136 }; 137 138 static struct snmp_mib snmp6_udplite6_list[] = { 139 SNMP_MIB_ITEM("UdpLite6InDatagrams", UDP_MIB_INDATAGRAMS), 140 SNMP_MIB_ITEM("UdpLite6NoPorts", UDP_MIB_NOPORTS), 141 SNMP_MIB_ITEM("UdpLite6InErrors", UDP_MIB_INERRORS), 142 SNMP_MIB_ITEM("UdpLite6OutDatagrams", UDP_MIB_OUTDATAGRAMS), 143 SNMP_MIB_SENTINEL 144 }; 145 #endif /* CONFIG_PROC_FS */ 146 147 static unsigned long 148 fold_field(void *mib[], int offt) 149 { 150 unsigned long res = 0; 151 int i; 152 153 for_each_possible_cpu(i) { 154 res += *(((unsigned long *)per_cpu_ptr(mib[0], i)) + offt); 155 res += *(((unsigned long *)per_cpu_ptr(mib[1], i)) + offt); 156 } 157 return res; 158 } 159 160 #ifdef CONFIG_PROC_FS 161 static inline void 162 snmp6_seq_show_item(struct seq_file *seq, void **mib, struct snmp_mib *itemlist) 163 { 164 int i; 165 for (i=0; itemlist[i].name; i++) 166 seq_printf(seq, "%-32s\t%lu\n", itemlist[i].name, 167 fold_field(mib, itemlist[i].entry)); 168 } 169 170 static int snmp6_seq_show(struct seq_file *seq, void *v) 171 { 172 struct inet6_dev *idev = (struct inet6_dev *)seq->private; 173 174 if (idev) { 175 seq_printf(seq, "%-32s\t%u\n", "ifIndex", idev->dev->ifindex); 176 snmp6_seq_show_item(seq, (void **)idev->stats.ipv6, snmp6_ipstats_list); 177 snmp6_seq_show_item(seq, (void **)idev->stats.icmpv6, snmp6_icmp6_list); 178 } else { 179 snmp6_seq_show_item(seq, (void **)ipv6_statistics, snmp6_ipstats_list); 180 snmp6_seq_show_item(seq, (void **)icmpv6_statistics, snmp6_icmp6_list); 181 snmp6_seq_show_item(seq, (void **)udp_stats_in6, snmp6_udp6_list); 182 snmp6_seq_show_item(seq, (void **)udplite_stats_in6, snmp6_udplite6_list); 183 } 184 return 0; 185 } 186 187 static int sockstat6_seq_open(struct inode *inode, struct file *file) 188 { 189 return single_open(file, sockstat6_seq_show, NULL); 190 } 191 192 static const struct file_operations sockstat6_seq_fops = { 193 .owner = THIS_MODULE, 194 .open = sockstat6_seq_open, 195 .read = seq_read, 196 .llseek = seq_lseek, 197 .release = single_release, 198 }; 199 200 static int snmp6_seq_open(struct inode *inode, struct file *file) 201 { 202 return single_open(file, snmp6_seq_show, PDE(inode)->data); 203 } 204 205 static const struct file_operations snmp6_seq_fops = { 206 .owner = THIS_MODULE, 207 .open = snmp6_seq_open, 208 .read = seq_read, 209 .llseek = seq_lseek, 210 .release = single_release, 211 }; 212 #endif /* CONFIG_PROC_FS */ 213 214 static inline void 215 __snmp6_fill_stats(u64 *stats, void **mib, int items, int bytes) 216 { 217 int i; 218 int pad = bytes - sizeof(u64) * items; 219 BUG_ON(pad < 0); 220 221 /* Use put_unaligned() because stats may not be aligned for u64. */ 222 put_unaligned(items, &stats[0]); 223 for (i = 1; i < items; i++) 224 put_unaligned(fold_field(mib, i), &stats[i]); 225 226 memset(&stats[items], 0, pad); 227 } 228 229 void 230 snmp6_fill_stats(u64 *stats, struct inet6_dev *idev, int attrtype, int bytes) 231 { 232 switch(attrtype) { 233 case IFLA_INET6_STATS: 234 __snmp6_fill_stats(stats, (void **)idev->stats.ipv6, IPSTATS_MIB_MAX, bytes); 235 break; 236 case IFLA_INET6_ICMP6STATS: 237 __snmp6_fill_stats(stats, (void **)idev->stats.icmpv6, ICMP6_MIB_MAX, bytes); 238 break; 239 } 240 } 241 242 #ifdef CONFIG_PROC_FS 243 int snmp6_register_dev(struct inet6_dev *idev) 244 { 245 struct proc_dir_entry *p; 246 247 if (!idev || !idev->dev) 248 return -EINVAL; 249 250 if (!proc_net_devsnmp6) 251 return -ENOENT; 252 253 p = create_proc_entry(idev->dev->name, S_IRUGO, proc_net_devsnmp6); 254 if (!p) 255 return -ENOMEM; 256 257 p->data = idev; 258 p->proc_fops = &snmp6_seq_fops; 259 260 idev->stats.proc_dir_entry = p; 261 return 0; 262 } 263 264 int snmp6_unregister_dev(struct inet6_dev *idev) 265 { 266 if (!proc_net_devsnmp6) 267 return -ENOENT; 268 if (!idev || !idev->stats.proc_dir_entry) 269 return -EINVAL; 270 remove_proc_entry(idev->stats.proc_dir_entry->name, 271 proc_net_devsnmp6); 272 return 0; 273 } 274 275 int __init ipv6_misc_proc_init(void) 276 { 277 int rc = 0; 278 279 if (!proc_net_fops_create("snmp6", S_IRUGO, &snmp6_seq_fops)) 280 goto proc_snmp6_fail; 281 282 proc_net_devsnmp6 = proc_mkdir("dev_snmp6", proc_net); 283 if (!proc_net_devsnmp6) 284 goto proc_dev_snmp6_fail; 285 286 if (!proc_net_fops_create("sockstat6", S_IRUGO, &sockstat6_seq_fops)) 287 goto proc_sockstat6_fail; 288 out: 289 return rc; 290 291 proc_sockstat6_fail: 292 proc_net_remove("dev_snmp6"); 293 proc_dev_snmp6_fail: 294 proc_net_remove("snmp6"); 295 proc_snmp6_fail: 296 rc = -ENOMEM; 297 goto out; 298 } 299 300 void ipv6_misc_proc_exit(void) 301 { 302 proc_net_remove("sockstat6"); 303 proc_net_remove("dev_snmp6"); 304 proc_net_remove("snmp6"); 305 } 306 307 #else /* CONFIG_PROC_FS */ 308 309 310 int snmp6_register_dev(struct inet6_dev *idev) 311 { 312 return 0; 313 } 314 315 int snmp6_unregister_dev(struct inet6_dev *idev) 316 { 317 return 0; 318 } 319 320 #endif /* CONFIG_PROC_FS */ 321 322 int snmp6_alloc_dev(struct inet6_dev *idev) 323 { 324 int err = -ENOMEM; 325 326 if (!idev || !idev->dev) 327 return -EINVAL; 328 329 if (snmp6_mib_init((void **)idev->stats.ipv6, sizeof(struct ipstats_mib), 330 __alignof__(struct ipstats_mib)) < 0) 331 goto err_ip; 332 if (snmp6_mib_init((void **)idev->stats.icmpv6, sizeof(struct icmpv6_mib), 333 __alignof__(struct icmpv6_mib)) < 0) 334 goto err_icmp; 335 336 return 0; 337 338 err_icmp: 339 snmp6_mib_free((void **)idev->stats.ipv6); 340 err_ip: 341 return err; 342 } 343 344 int snmp6_free_dev(struct inet6_dev *idev) 345 { 346 snmp6_mib_free((void **)idev->stats.icmpv6); 347 snmp6_mib_free((void **)idev->stats.ipv6); 348 return 0; 349 } 350 351 int snmp6_mib_init(void *ptr[2], size_t mibsize, size_t mibalign) 352 { 353 if (ptr == NULL) 354 return -EINVAL; 355 356 ptr[0] = __alloc_percpu(mibsize); 357 if (!ptr[0]) 358 goto err0; 359 360 ptr[1] = __alloc_percpu(mibsize); 361 if (!ptr[1]) 362 goto err1; 363 364 return 0; 365 366 err1: 367 free_percpu(ptr[0]); 368 ptr[0] = NULL; 369 err0: 370 return -ENOMEM; 371 } 372 373 void snmp6_mib_free(void *ptr[2]) 374 { 375 if (ptr == NULL) 376 return; 377 free_percpu(ptr[0]); 378 free_percpu(ptr[1]); 379 ptr[0] = ptr[1] = NULL; 380 } 381 382