[PATCH] for_each_possible_cpu: network codes
[linux-2.6.git] / net / ipv6 / proc.c
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_each_possible_cpu(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_each_possible_cpu(i) {
144                 res += *(((unsigned long *)per_cpu_ptr(mib[0], i)) + offt);
145                 res += *(((unsigned long *)per_cpu_ptr(mib[1], i)) + offt);
146         }
147         return res;
148 }
149
150 static inline void
151 snmp6_seq_show_item(struct seq_file *seq, void **mib, struct snmp_mib *itemlist)
152 {
153         int i;
154         for (i=0; itemlist[i].name; i++)
155                 seq_printf(seq, "%-32s\t%lu\n", itemlist[i].name, 
156                                 fold_field(mib, itemlist[i].entry));
157 }
158
159 static int snmp6_seq_show(struct seq_file *seq, void *v)
160 {
161         struct inet6_dev *idev = (struct inet6_dev *)seq->private;
162
163         if (idev) {
164                 seq_printf(seq, "%-32s\t%u\n", "ifIndex", idev->dev->ifindex);
165                 snmp6_seq_show_item(seq, (void **)idev->stats.icmpv6, snmp6_icmp6_list);
166         } else {
167                 snmp6_seq_show_item(seq, (void **)ipv6_statistics, snmp6_ipstats_list);
168                 snmp6_seq_show_item(seq, (void **)icmpv6_statistics, snmp6_icmp6_list);
169                 snmp6_seq_show_item(seq, (void **)udp_stats_in6, snmp6_udp6_list);
170         }
171         return 0;
172 }
173
174 static int sockstat6_seq_open(struct inode *inode, struct file *file)
175 {
176         return single_open(file, sockstat6_seq_show, NULL);
177 }
178
179 static struct file_operations sockstat6_seq_fops = {
180         .owner   = THIS_MODULE,
181         .open    = sockstat6_seq_open,
182         .read    = seq_read,
183         .llseek  = seq_lseek,
184         .release = single_release,
185 };
186
187 static int snmp6_seq_open(struct inode *inode, struct file *file)
188 {
189         return single_open(file, snmp6_seq_show, PDE(inode)->data);
190 }
191
192 static struct file_operations snmp6_seq_fops = {
193         .owner   = THIS_MODULE,
194         .open    = snmp6_seq_open,
195         .read    = seq_read,
196         .llseek  = seq_lseek,
197         .release = single_release,
198 };
199
200 int snmp6_register_dev(struct inet6_dev *idev)
201 {
202         struct proc_dir_entry *p;
203
204         if (!idev || !idev->dev)
205                 return -EINVAL;
206
207         if (!proc_net_devsnmp6)
208                 return -ENOENT;
209
210         p = create_proc_entry(idev->dev->name, S_IRUGO, proc_net_devsnmp6);
211         if (!p)
212                 return -ENOMEM;
213
214         p->data = idev;
215         p->proc_fops = &snmp6_seq_fops;
216
217         idev->stats.proc_dir_entry = p;
218         return 0;
219 }
220
221 int snmp6_unregister_dev(struct inet6_dev *idev)
222 {
223         if (!proc_net_devsnmp6)
224                 return -ENOENT;
225         if (!idev || !idev->stats.proc_dir_entry)
226                 return -EINVAL;
227         remove_proc_entry(idev->stats.proc_dir_entry->name,
228                           proc_net_devsnmp6);
229         return 0;
230 }
231
232 int __init ipv6_misc_proc_init(void)
233 {
234         int rc = 0;
235
236         if (!proc_net_fops_create("snmp6", S_IRUGO, &snmp6_seq_fops))
237                 goto proc_snmp6_fail;
238
239         proc_net_devsnmp6 = proc_mkdir("dev_snmp6", proc_net);
240         if (!proc_net_devsnmp6)
241                 goto proc_dev_snmp6_fail;
242
243         if (!proc_net_fops_create("sockstat6", S_IRUGO, &sockstat6_seq_fops))
244                 goto proc_sockstat6_fail;
245 out:
246         return rc;
247
248 proc_sockstat6_fail:
249         proc_net_remove("dev_snmp6");
250 proc_dev_snmp6_fail:
251         proc_net_remove("snmp6");
252 proc_snmp6_fail:
253         rc = -ENOMEM;
254         goto out;
255 }
256
257 void ipv6_misc_proc_exit(void)
258 {
259         proc_net_remove("sockstat6");
260         proc_net_remove("dev_snmp6");
261         proc_net_remove("snmp6");
262 }
263
264 #else   /* CONFIG_PROC_FS */
265
266
267 int snmp6_register_dev(struct inet6_dev *idev)
268 {
269         return 0;
270 }
271
272 int snmp6_unregister_dev(struct inet6_dev *idev)
273 {
274         return 0;
275 }
276 #endif  /* CONFIG_PROC_FS */
277
278 int snmp6_alloc_dev(struct inet6_dev *idev)
279 {
280         int err = -ENOMEM;
281
282         if (!idev || !idev->dev)
283                 return -EINVAL;
284
285         if (snmp6_mib_init((void **)idev->stats.icmpv6, sizeof(struct icmpv6_mib),
286                            __alignof__(struct icmpv6_mib)) < 0)
287                 goto err_icmp;
288
289         return 0;
290
291 err_icmp:
292         return err;
293 }
294
295 int snmp6_free_dev(struct inet6_dev *idev)
296 {
297         snmp6_mib_free((void **)idev->stats.icmpv6);
298         return 0;
299 }
300
301