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/config.h> 21 #include <linux/sched.h> 22 #include <linux/socket.h> 23 #include <linux/net.h> 24 #include <linux/ipv6.h> 25 #include <linux/proc_fs.h> 26 #include <linux/seq_file.h> 27 #include <linux/stddef.h> 28 #include <net/sock.h> 29 #include <net/tcp.h> 30 #include <net/transp_v6.h> 31 #include <net/ipv6.h> 32 33 #ifdef CONFIG_PROC_FS 34 static struct proc_dir_entry *proc_net_devsnmp6; 35 36 static int fold_prot_inuse(struct proto *proto) 37 { 38 int res = 0; 39 int cpu; 40 41 for (cpu=0; cpu<NR_CPUS; cpu++) 42 res += proto->stats[cpu].inuse; 43 44 return res; 45 } 46 47 static int sockstat6_seq_show(struct seq_file *seq, void *v) 48 { 49 seq_printf(seq, "TCP6: inuse %d\n", 50 fold_prot_inuse(&tcpv6_prot)); 51 seq_printf(seq, "UDP6: inuse %d\n", 52 fold_prot_inuse(&udpv6_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 unsigned long 138 fold_field(void *mib[], int offt) 139 { 140 unsigned long res = 0; 141 int i; 142 143 for (i = 0; i < NR_CPUS; i++) { 144 if (!cpu_possible(i)) 145 continue; 146 res += *(((unsigned long *)per_cpu_ptr(mib[0], i)) + offt); 147 res += *(((unsigned long *)per_cpu_ptr(mib[1], i)) + offt); 148 } 149 return res; 150 } 151 152 static inline void 153 snmp6_seq_show_item(struct seq_file *seq, void **mib, struct snmp_mib *itemlist) 154 { 155 int i; 156 for (i=0; itemlist[i].name; i++) 157 seq_printf(seq, "%-32s\t%lu\n", itemlist[i].name, 158 fold_field(mib, itemlist[i].entry)); 159 } 160 161 static int snmp6_seq_show(struct seq_file *seq, void *v) 162 { 163 struct inet6_dev *idev = (struct inet6_dev *)seq->private; 164 165 if (idev) { 166 seq_printf(seq, "%-32s\t%u\n", "ifIndex", idev->dev->ifindex); 167 snmp6_seq_show_item(seq, (void **)idev->stats.icmpv6, snmp6_icmp6_list); 168 } else { 169 snmp6_seq_show_item(seq, (void **)ipv6_statistics, snmp6_ipstats_list); 170 snmp6_seq_show_item(seq, (void **)icmpv6_statistics, snmp6_icmp6_list); 171 snmp6_seq_show_item(seq, (void **)udp_stats_in6, snmp6_udp6_list); 172 } 173 return 0; 174 } 175 176 static int sockstat6_seq_open(struct inode *inode, struct file *file) 177 { 178 return single_open(file, sockstat6_seq_show, NULL); 179 } 180 181 static struct file_operations sockstat6_seq_fops = { 182 .owner = THIS_MODULE, 183 .open = sockstat6_seq_open, 184 .read = seq_read, 185 .llseek = seq_lseek, 186 .release = single_release, 187 }; 188 189 static int snmp6_seq_open(struct inode *inode, struct file *file) 190 { 191 return single_open(file, snmp6_seq_show, PDE(inode)->data); 192 } 193 194 static struct file_operations snmp6_seq_fops = { 195 .owner = THIS_MODULE, 196 .open = snmp6_seq_open, 197 .read = seq_read, 198 .llseek = seq_lseek, 199 .release = single_release, 200 }; 201 202 int snmp6_register_dev(struct inet6_dev *idev) 203 { 204 struct proc_dir_entry *p; 205 206 if (!idev || !idev->dev) 207 return -EINVAL; 208 209 if (!proc_net_devsnmp6) 210 return -ENOENT; 211 212 p = create_proc_entry(idev->dev->name, S_IRUGO, proc_net_devsnmp6); 213 if (!p) 214 return -ENOMEM; 215 216 p->data = idev; 217 p->proc_fops = &snmp6_seq_fops; 218 219 idev->stats.proc_dir_entry = p; 220 return 0; 221 } 222 223 int snmp6_unregister_dev(struct inet6_dev *idev) 224 { 225 if (!proc_net_devsnmp6) 226 return -ENOENT; 227 if (!idev || !idev->stats.proc_dir_entry) 228 return -EINVAL; 229 remove_proc_entry(idev->stats.proc_dir_entry->name, 230 proc_net_devsnmp6); 231 return 0; 232 } 233 234 int __init ipv6_misc_proc_init(void) 235 { 236 int rc = 0; 237 238 if (!proc_net_fops_create("snmp6", S_IRUGO, &snmp6_seq_fops)) 239 goto proc_snmp6_fail; 240 241 proc_net_devsnmp6 = proc_mkdir("dev_snmp6", proc_net); 242 if (!proc_net_devsnmp6) 243 goto proc_dev_snmp6_fail; 244 245 if (!proc_net_fops_create("sockstat6", S_IRUGO, &sockstat6_seq_fops)) 246 goto proc_sockstat6_fail; 247 out: 248 return rc; 249 250 proc_sockstat6_fail: 251 proc_net_remove("dev_snmp6"); 252 proc_dev_snmp6_fail: 253 proc_net_remove("snmp6"); 254 proc_snmp6_fail: 255 rc = -ENOMEM; 256 goto out; 257 } 258 259 void ipv6_misc_proc_exit(void) 260 { 261 proc_net_remove("sockstat6"); 262 proc_net_remove("dev_snmp6"); 263 proc_net_remove("snmp6"); 264 } 265 266 #else /* CONFIG_PROC_FS */ 267 268 269 int snmp6_register_dev(struct inet6_dev *idev) 270 { 271 return 0; 272 } 273 274 int snmp6_unregister_dev(struct inet6_dev *idev) 275 { 276 return 0; 277 } 278 #endif /* CONFIG_PROC_FS */ 279 280 int snmp6_alloc_dev(struct inet6_dev *idev) 281 { 282 int err = -ENOMEM; 283 284 if (!idev || !idev->dev) 285 return -EINVAL; 286 287 if (snmp6_mib_init((void **)idev->stats.icmpv6, sizeof(struct icmpv6_mib), 288 __alignof__(struct icmpv6_mib)) < 0) 289 goto err_icmp; 290 291 return 0; 292 293 err_icmp: 294 return err; 295 } 296 297 int snmp6_free_dev(struct inet6_dev *idev) 298 { 299 snmp6_mib_free((void **)idev->stats.icmpv6); 300 return 0; 301 } 302 303 304