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/sched.h> 21 #include <linux/socket.h> 22 #include <linux/net.h> 23 #include <linux/ipv6.h> 24 #include <linux/proc_fs.h> 25 #include <linux/seq_file.h> 26 #include <linux/stddef.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, "RAW6: inuse %d\n", 53 fold_prot_inuse(&rawv6_prot)); 54 seq_printf(seq, "FRAG6: inuse %d memory %d\n", 55 ip6_frag_nqueues, atomic_read(&ip6_frag_mem)); 56 return 0; 57 } 58 59 static struct snmp_mib snmp6_ipstats_list[] = { 60 /* ipv6 mib according to RFC 2465 */ 61 SNMP_MIB_ITEM("Ip6InReceives", IPSTATS_MIB_INRECEIVES), 62 SNMP_MIB_ITEM("Ip6InHdrErrors", IPSTATS_MIB_INHDRERRORS), 63 SNMP_MIB_ITEM("Ip6InTooBigErrors", IPSTATS_MIB_INTOOBIGERRORS), 64 SNMP_MIB_ITEM("Ip6InNoRoutes", IPSTATS_MIB_INNOROUTES), 65 SNMP_MIB_ITEM("Ip6InAddrErrors", IPSTATS_MIB_INADDRERRORS), 66 SNMP_MIB_ITEM("Ip6InUnknownProtos", IPSTATS_MIB_INUNKNOWNPROTOS), 67 SNMP_MIB_ITEM("Ip6InTruncatedPkts", IPSTATS_MIB_INTRUNCATEDPKTS), 68 SNMP_MIB_ITEM("Ip6InDiscards", IPSTATS_MIB_INDISCARDS), 69 SNMP_MIB_ITEM("Ip6InDelivers", IPSTATS_MIB_INDELIVERS), 70 SNMP_MIB_ITEM("Ip6OutForwDatagrams", IPSTATS_MIB_OUTFORWDATAGRAMS), 71 SNMP_MIB_ITEM("Ip6OutRequests", IPSTATS_MIB_OUTREQUESTS), 72 SNMP_MIB_ITEM("Ip6OutDiscards", IPSTATS_MIB_OUTDISCARDS), 73 SNMP_MIB_ITEM("Ip6OutNoRoutes", IPSTATS_MIB_OUTNOROUTES), 74 SNMP_MIB_ITEM("Ip6ReasmTimeout", IPSTATS_MIB_REASMTIMEOUT), 75 SNMP_MIB_ITEM("Ip6ReasmReqds", IPSTATS_MIB_REASMREQDS), 76 SNMP_MIB_ITEM("Ip6ReasmOKs", IPSTATS_MIB_REASMOKS), 77 SNMP_MIB_ITEM("Ip6ReasmFails", IPSTATS_MIB_REASMFAILS), 78 SNMP_MIB_ITEM("Ip6FragOKs", IPSTATS_MIB_FRAGOKS), 79 SNMP_MIB_ITEM("Ip6FragFails", IPSTATS_MIB_FRAGFAILS), 80 SNMP_MIB_ITEM("Ip6FragCreates", IPSTATS_MIB_FRAGCREATES), 81 SNMP_MIB_ITEM("Ip6InMcastPkts", IPSTATS_MIB_INMCASTPKTS), 82 SNMP_MIB_ITEM("Ip6OutMcastPkts", IPSTATS_MIB_OUTMCASTPKTS), 83 SNMP_MIB_SENTINEL 84 }; 85 86 static struct snmp_mib snmp6_icmp6_list[] = { 87 /* icmpv6 mib according to RFC 2466 88 89 Exceptions: {In|Out}AdminProhibs are removed, because I see 90 no good reasons to account them separately 91 of another dest.unreachs. 92 OutErrs is zero identically. 93 OutEchos too. 94 OutRouterAdvertisements too. 95 OutGroupMembQueries too. 96 */ 97 SNMP_MIB_ITEM("Icmp6InMsgs", ICMP6_MIB_INMSGS), 98 SNMP_MIB_ITEM("Icmp6InErrors", ICMP6_MIB_INERRORS), 99 SNMP_MIB_ITEM("Icmp6InDestUnreachs", ICMP6_MIB_INDESTUNREACHS), 100 SNMP_MIB_ITEM("Icmp6InPktTooBigs", ICMP6_MIB_INPKTTOOBIGS), 101 SNMP_MIB_ITEM("Icmp6InTimeExcds", ICMP6_MIB_INTIMEEXCDS), 102 SNMP_MIB_ITEM("Icmp6InParmProblems", ICMP6_MIB_INPARMPROBLEMS), 103 SNMP_MIB_ITEM("Icmp6InEchos", ICMP6_MIB_INECHOS), 104 SNMP_MIB_ITEM("Icmp6InEchoReplies", ICMP6_MIB_INECHOREPLIES), 105 SNMP_MIB_ITEM("Icmp6InGroupMembQueries", ICMP6_MIB_INGROUPMEMBQUERIES), 106 SNMP_MIB_ITEM("Icmp6InGroupMembResponses", ICMP6_MIB_INGROUPMEMBRESPONSES), 107 SNMP_MIB_ITEM("Icmp6InGroupMembReductions", ICMP6_MIB_INGROUPMEMBREDUCTIONS), 108 SNMP_MIB_ITEM("Icmp6InRouterSolicits", ICMP6_MIB_INROUTERSOLICITS), 109 SNMP_MIB_ITEM("Icmp6InRouterAdvertisements", ICMP6_MIB_INROUTERADVERTISEMENTS), 110 SNMP_MIB_ITEM("Icmp6InNeighborSolicits", ICMP6_MIB_INNEIGHBORSOLICITS), 111 SNMP_MIB_ITEM("Icmp6InNeighborAdvertisements", ICMP6_MIB_INNEIGHBORADVERTISEMENTS), 112 SNMP_MIB_ITEM("Icmp6InRedirects", ICMP6_MIB_INREDIRECTS), 113 SNMP_MIB_ITEM("Icmp6OutMsgs", ICMP6_MIB_OUTMSGS), 114 SNMP_MIB_ITEM("Icmp6OutDestUnreachs", ICMP6_MIB_OUTDESTUNREACHS), 115 SNMP_MIB_ITEM("Icmp6OutPktTooBigs", ICMP6_MIB_OUTPKTTOOBIGS), 116 SNMP_MIB_ITEM("Icmp6OutTimeExcds", ICMP6_MIB_OUTTIMEEXCDS), 117 SNMP_MIB_ITEM("Icmp6OutParmProblems", ICMP6_MIB_OUTPARMPROBLEMS), 118 SNMP_MIB_ITEM("Icmp6OutEchoReplies", ICMP6_MIB_OUTECHOREPLIES), 119 SNMP_MIB_ITEM("Icmp6OutRouterSolicits", ICMP6_MIB_OUTROUTERSOLICITS), 120 SNMP_MIB_ITEM("Icmp6OutNeighborSolicits", ICMP6_MIB_OUTNEIGHBORSOLICITS), 121 SNMP_MIB_ITEM("Icmp6OutNeighborAdvertisements", ICMP6_MIB_OUTNEIGHBORADVERTISEMENTS), 122 SNMP_MIB_ITEM("Icmp6OutRedirects", ICMP6_MIB_OUTREDIRECTS), 123 SNMP_MIB_ITEM("Icmp6OutGroupMembResponses", ICMP6_MIB_OUTGROUPMEMBRESPONSES), 124 SNMP_MIB_ITEM("Icmp6OutGroupMembReductions", ICMP6_MIB_OUTGROUPMEMBREDUCTIONS), 125 SNMP_MIB_SENTINEL 126 }; 127 128 static struct snmp_mib snmp6_udp6_list[] = { 129 SNMP_MIB_ITEM("Udp6InDatagrams", UDP_MIB_INDATAGRAMS), 130 SNMP_MIB_ITEM("Udp6NoPorts", UDP_MIB_NOPORTS), 131 SNMP_MIB_ITEM("Udp6InErrors", UDP_MIB_INERRORS), 132 SNMP_MIB_ITEM("Udp6OutDatagrams", UDP_MIB_OUTDATAGRAMS), 133 SNMP_MIB_SENTINEL 134 }; 135 136 static unsigned long 137 fold_field(void *mib[], int offt) 138 { 139 unsigned long res = 0; 140 int i; 141 142 for_each_possible_cpu(i) { 143 res += *(((unsigned long *)per_cpu_ptr(mib[0], i)) + offt); 144 res += *(((unsigned long *)per_cpu_ptr(mib[1], i)) + offt); 145 } 146 return res; 147 } 148 149 static inline void 150 snmp6_seq_show_item(struct seq_file *seq, void **mib, struct snmp_mib *itemlist) 151 { 152 int i; 153 for (i=0; itemlist[i].name; i++) 154 seq_printf(seq, "%-32s\t%lu\n", itemlist[i].name, 155 fold_field(mib, itemlist[i].entry)); 156 } 157 158 static int snmp6_seq_show(struct seq_file *seq, void *v) 159 { 160 struct inet6_dev *idev = (struct inet6_dev *)seq->private; 161 162 if (idev) { 163 seq_printf(seq, "%-32s\t%u\n", "ifIndex", idev->dev->ifindex); 164 snmp6_seq_show_item(seq, (void **)idev->stats.icmpv6, snmp6_icmp6_list); 165 } else { 166 snmp6_seq_show_item(seq, (void **)ipv6_statistics, snmp6_ipstats_list); 167 snmp6_seq_show_item(seq, (void **)icmpv6_statistics, snmp6_icmp6_list); 168 snmp6_seq_show_item(seq, (void **)udp_stats_in6, snmp6_udp6_list); 169 } 170 return 0; 171 } 172 173 static int sockstat6_seq_open(struct inode *inode, struct file *file) 174 { 175 return single_open(file, sockstat6_seq_show, NULL); 176 } 177 178 static struct file_operations sockstat6_seq_fops = { 179 .owner = THIS_MODULE, 180 .open = sockstat6_seq_open, 181 .read = seq_read, 182 .llseek = seq_lseek, 183 .release = single_release, 184 }; 185 186 static int snmp6_seq_open(struct inode *inode, struct file *file) 187 { 188 return single_open(file, snmp6_seq_show, PDE(inode)->data); 189 } 190 191 static struct file_operations snmp6_seq_fops = { 192 .owner = THIS_MODULE, 193 .open = snmp6_seq_open, 194 .read = seq_read, 195 .llseek = seq_lseek, 196 .release = single_release, 197 }; 198 199 int snmp6_register_dev(struct inet6_dev *idev) 200 { 201 struct proc_dir_entry *p; 202 203 if (!idev || !idev->dev) 204 return -EINVAL; 205 206 if (!proc_net_devsnmp6) 207 return -ENOENT; 208 209 p = create_proc_entry(idev->dev->name, S_IRUGO, proc_net_devsnmp6); 210 if (!p) 211 return -ENOMEM; 212 213 p->data = idev; 214 p->proc_fops = &snmp6_seq_fops; 215 216 idev->stats.proc_dir_entry = p; 217 return 0; 218 } 219 220 int snmp6_unregister_dev(struct inet6_dev *idev) 221 { 222 if (!proc_net_devsnmp6) 223 return -ENOENT; 224 if (!idev || !idev->stats.proc_dir_entry) 225 return -EINVAL; 226 remove_proc_entry(idev->stats.proc_dir_entry->name, 227 proc_net_devsnmp6); 228 return 0; 229 } 230 231 int __init ipv6_misc_proc_init(void) 232 { 233 int rc = 0; 234 235 if (!proc_net_fops_create("snmp6", S_IRUGO, &snmp6_seq_fops)) 236 goto proc_snmp6_fail; 237 238 proc_net_devsnmp6 = proc_mkdir("dev_snmp6", proc_net); 239 if (!proc_net_devsnmp6) 240 goto proc_dev_snmp6_fail; 241 242 if (!proc_net_fops_create("sockstat6", S_IRUGO, &sockstat6_seq_fops)) 243 goto proc_sockstat6_fail; 244 out: 245 return rc; 246 247 proc_sockstat6_fail: 248 proc_net_remove("dev_snmp6"); 249 proc_dev_snmp6_fail: 250 proc_net_remove("snmp6"); 251 proc_snmp6_fail: 252 rc = -ENOMEM; 253 goto out; 254 } 255 256 void ipv6_misc_proc_exit(void) 257 { 258 proc_net_remove("sockstat6"); 259 proc_net_remove("dev_snmp6"); 260 proc_net_remove("snmp6"); 261 } 262 263 #else /* CONFIG_PROC_FS */ 264 265 266 int snmp6_register_dev(struct inet6_dev *idev) 267 { 268 return 0; 269 } 270 271 int snmp6_unregister_dev(struct inet6_dev *idev) 272 { 273 return 0; 274 } 275 #endif /* CONFIG_PROC_FS */ 276 277 int snmp6_alloc_dev(struct inet6_dev *idev) 278 { 279 int err = -ENOMEM; 280 281 if (!idev || !idev->dev) 282 return -EINVAL; 283 284 if (snmp6_mib_init((void **)idev->stats.icmpv6, sizeof(struct icmpv6_mib), 285 __alignof__(struct icmpv6_mib)) < 0) 286 goto err_icmp; 287 288 return 0; 289 290 err_icmp: 291 return err; 292 } 293 294 int snmp6_free_dev(struct inet6_dev *idev) 295 { 296 snmp6_mib_free((void **)idev->stats.icmpv6); 297 return 0; 298 } 299 300 301