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kernel-ark/net/ipv6/proc.c
Stephen Hemminger 5632c5152a [IPV6]: Track device renames in snmp6. 
When network device's are renamed, the IPV6 snmp6 code
gets confused. It doesn't track name changes so it will OOPS
when network device's are removed.

The fix is trivial, just unregister/re-register in notify handler.

Signed-off-by: Stephen Hemminger <shemminger@linux-foundation.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2007-04-28 21:16:39 -07:00

262 lines
8.6 KiB
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/*
* INET An implementation of the TCP/IP protocol suite for the LINUX
* operating system. INET is implemented using the BSD Socket
* interface as the means of communication with the user level.
*
* This file implements the various access functions for the
* PROC file system. This is very similar to the IPv4 version,
* except it reports the sockets in the INET6 address family.
*
* Version: $Id: proc.c,v 1.17 2002/02/01 22:01:04 davem Exp $
*
* Authors: David S. Miller (davem@caip.rutgers.edu)
* YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org>
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version
* 2 of the License, or (at your option) any later version.
*/
#include <linux/socket.h>
#include <linux/net.h>
#include <linux/ipv6.h>
#include <linux/proc_fs.h>
#include <linux/seq_file.h>
#include <linux/stddef.h>
#include <net/ip.h>
#include <net/sock.h>
#include <net/tcp.h>
#include <net/transp_v6.h>
#include <net/ipv6.h>
static struct proc_dir_entry *proc_net_devsnmp6;
static int fold_prot_inuse(struct proto *proto)
{
int res = 0;
int cpu;
for_each_possible_cpu(cpu)
res += proto->stats[cpu].inuse;
return res;
}
static int sockstat6_seq_show(struct seq_file *seq, void *v)
{
seq_printf(seq, "TCP6: inuse %d\n",
fold_prot_inuse(&tcpv6_prot));
seq_printf(seq, "UDP6: inuse %d\n",
fold_prot_inuse(&udpv6_prot));
seq_printf(seq, "UDPLITE6: inuse %d\n",
fold_prot_inuse(&udplitev6_prot));
seq_printf(seq, "RAW6: inuse %d\n",
fold_prot_inuse(&rawv6_prot));
seq_printf(seq, "FRAG6: inuse %d memory %d\n",
ip6_frag_nqueues, atomic_read(&ip6_frag_mem));
return 0;
}
static struct snmp_mib snmp6_ipstats_list[] = {
/* ipv6 mib according to RFC 2465 */
SNMP_MIB_ITEM("Ip6InReceives", IPSTATS_MIB_INRECEIVES),
SNMP_MIB_ITEM("Ip6InHdrErrors", IPSTATS_MIB_INHDRERRORS),
SNMP_MIB_ITEM("Ip6InTooBigErrors", IPSTATS_MIB_INTOOBIGERRORS),
SNMP_MIB_ITEM("Ip6InNoRoutes", IPSTATS_MIB_INNOROUTES),
SNMP_MIB_ITEM("Ip6InAddrErrors", IPSTATS_MIB_INADDRERRORS),
SNMP_MIB_ITEM("Ip6InUnknownProtos", IPSTATS_MIB_INUNKNOWNPROTOS),
SNMP_MIB_ITEM("Ip6InTruncatedPkts", IPSTATS_MIB_INTRUNCATEDPKTS),
SNMP_MIB_ITEM("Ip6InDiscards", IPSTATS_MIB_INDISCARDS),
SNMP_MIB_ITEM("Ip6InDelivers", IPSTATS_MIB_INDELIVERS),
SNMP_MIB_ITEM("Ip6OutForwDatagrams", IPSTATS_MIB_OUTFORWDATAGRAMS),
SNMP_MIB_ITEM("Ip6OutRequests", IPSTATS_MIB_OUTREQUESTS),
SNMP_MIB_ITEM("Ip6OutDiscards", IPSTATS_MIB_OUTDISCARDS),
SNMP_MIB_ITEM("Ip6OutNoRoutes", IPSTATS_MIB_OUTNOROUTES),
SNMP_MIB_ITEM("Ip6ReasmTimeout", IPSTATS_MIB_REASMTIMEOUT),
SNMP_MIB_ITEM("Ip6ReasmReqds", IPSTATS_MIB_REASMREQDS),
SNMP_MIB_ITEM("Ip6ReasmOKs", IPSTATS_MIB_REASMOKS),
SNMP_MIB_ITEM("Ip6ReasmFails", IPSTATS_MIB_REASMFAILS),
SNMP_MIB_ITEM("Ip6FragOKs", IPSTATS_MIB_FRAGOKS),
SNMP_MIB_ITEM("Ip6FragFails", IPSTATS_MIB_FRAGFAILS),
SNMP_MIB_ITEM("Ip6FragCreates", IPSTATS_MIB_FRAGCREATES),
SNMP_MIB_ITEM("Ip6InMcastPkts", IPSTATS_MIB_INMCASTPKTS),
SNMP_MIB_ITEM("Ip6OutMcastPkts", IPSTATS_MIB_OUTMCASTPKTS),
SNMP_MIB_SENTINEL
};
static struct snmp_mib snmp6_icmp6_list[] = {
/* icmpv6 mib according to RFC 2466
Exceptions: {In|Out}AdminProhibs are removed, because I see
no good reasons to account them separately
of another dest.unreachs.
OutErrs is zero identically.
OutEchos too.
OutRouterAdvertisements too.
OutGroupMembQueries too.
*/
SNMP_MIB_ITEM("Icmp6InMsgs", ICMP6_MIB_INMSGS),
SNMP_MIB_ITEM("Icmp6InErrors", ICMP6_MIB_INERRORS),
SNMP_MIB_ITEM("Icmp6InDestUnreachs", ICMP6_MIB_INDESTUNREACHS),
SNMP_MIB_ITEM("Icmp6InPktTooBigs", ICMP6_MIB_INPKTTOOBIGS),
SNMP_MIB_ITEM("Icmp6InTimeExcds", ICMP6_MIB_INTIMEEXCDS),
SNMP_MIB_ITEM("Icmp6InParmProblems", ICMP6_MIB_INPARMPROBLEMS),
SNMP_MIB_ITEM("Icmp6InEchos", ICMP6_MIB_INECHOS),
SNMP_MIB_ITEM("Icmp6InEchoReplies", ICMP6_MIB_INECHOREPLIES),
SNMP_MIB_ITEM("Icmp6InGroupMembQueries", ICMP6_MIB_INGROUPMEMBQUERIES),
SNMP_MIB_ITEM("Icmp6InGroupMembResponses", ICMP6_MIB_INGROUPMEMBRESPONSES),
SNMP_MIB_ITEM("Icmp6InGroupMembReductions", ICMP6_MIB_INGROUPMEMBREDUCTIONS),
SNMP_MIB_ITEM("Icmp6InRouterSolicits", ICMP6_MIB_INROUTERSOLICITS),
SNMP_MIB_ITEM("Icmp6InRouterAdvertisements", ICMP6_MIB_INROUTERADVERTISEMENTS),
SNMP_MIB_ITEM("Icmp6InNeighborSolicits", ICMP6_MIB_INNEIGHBORSOLICITS),
SNMP_MIB_ITEM("Icmp6InNeighborAdvertisements", ICMP6_MIB_INNEIGHBORADVERTISEMENTS),
SNMP_MIB_ITEM("Icmp6InRedirects", ICMP6_MIB_INREDIRECTS),
SNMP_MIB_ITEM("Icmp6OutMsgs", ICMP6_MIB_OUTMSGS),
SNMP_MIB_ITEM("Icmp6OutDestUnreachs", ICMP6_MIB_OUTDESTUNREACHS),
SNMP_MIB_ITEM("Icmp6OutPktTooBigs", ICMP6_MIB_OUTPKTTOOBIGS),
SNMP_MIB_ITEM("Icmp6OutTimeExcds", ICMP6_MIB_OUTTIMEEXCDS),
SNMP_MIB_ITEM("Icmp6OutParmProblems", ICMP6_MIB_OUTPARMPROBLEMS),
SNMP_MIB_ITEM("Icmp6OutEchoReplies", ICMP6_MIB_OUTECHOREPLIES),
SNMP_MIB_ITEM("Icmp6OutRouterSolicits", ICMP6_MIB_OUTROUTERSOLICITS),
SNMP_MIB_ITEM("Icmp6OutNeighborSolicits", ICMP6_MIB_OUTNEIGHBORSOLICITS),
SNMP_MIB_ITEM("Icmp6OutNeighborAdvertisements", ICMP6_MIB_OUTNEIGHBORADVERTISEMENTS),
SNMP_MIB_ITEM("Icmp6OutRedirects", ICMP6_MIB_OUTREDIRECTS),
SNMP_MIB_ITEM("Icmp6OutGroupMembResponses", ICMP6_MIB_OUTGROUPMEMBRESPONSES),
SNMP_MIB_ITEM("Icmp6OutGroupMembReductions", ICMP6_MIB_OUTGROUPMEMBREDUCTIONS),
SNMP_MIB_SENTINEL
};
static struct snmp_mib snmp6_udp6_list[] = {
SNMP_MIB_ITEM("Udp6InDatagrams", UDP_MIB_INDATAGRAMS),
SNMP_MIB_ITEM("Udp6NoPorts", UDP_MIB_NOPORTS),
SNMP_MIB_ITEM("Udp6InErrors", UDP_MIB_INERRORS),
SNMP_MIB_ITEM("Udp6OutDatagrams", UDP_MIB_OUTDATAGRAMS),
SNMP_MIB_SENTINEL
};
static struct snmp_mib snmp6_udplite6_list[] = {
SNMP_MIB_ITEM("UdpLite6InDatagrams", UDP_MIB_INDATAGRAMS),
SNMP_MIB_ITEM("UdpLite6NoPorts", UDP_MIB_NOPORTS),
SNMP_MIB_ITEM("UdpLite6InErrors", UDP_MIB_INERRORS),
SNMP_MIB_ITEM("UdpLite6OutDatagrams", UDP_MIB_OUTDATAGRAMS),
SNMP_MIB_SENTINEL
};
static inline void
snmp6_seq_show_item(struct seq_file *seq, void **mib, struct snmp_mib *itemlist)
{
int i;
for (i=0; itemlist[i].name; i++)
seq_printf(seq, "%-32s\t%lu\n", itemlist[i].name,
snmp_fold_field(mib, itemlist[i].entry));
}
static int snmp6_seq_show(struct seq_file *seq, void *v)
{
struct inet6_dev *idev = (struct inet6_dev *)seq->private;
if (idev) {
seq_printf(seq, "%-32s\t%u\n", "ifIndex", idev->dev->ifindex);
snmp6_seq_show_item(seq, (void **)idev->stats.ipv6, snmp6_ipstats_list);
snmp6_seq_show_item(seq, (void **)idev->stats.icmpv6, snmp6_icmp6_list);
} else {
snmp6_seq_show_item(seq, (void **)ipv6_statistics, snmp6_ipstats_list);
snmp6_seq_show_item(seq, (void **)icmpv6_statistics, snmp6_icmp6_list);
snmp6_seq_show_item(seq, (void **)udp_stats_in6, snmp6_udp6_list);
snmp6_seq_show_item(seq, (void **)udplite_stats_in6, snmp6_udplite6_list);
}
return 0;
}
static int sockstat6_seq_open(struct inode *inode, struct file *file)
{
return single_open(file, sockstat6_seq_show, NULL);
}
static const struct file_operations sockstat6_seq_fops = {
.owner = THIS_MODULE,
.open = sockstat6_seq_open,
.read = seq_read,
.llseek = seq_lseek,
.release = single_release,
};
static int snmp6_seq_open(struct inode *inode, struct file *file)
{
return single_open(file, snmp6_seq_show, PDE(inode)->data);
}
static const struct file_operations snmp6_seq_fops = {
.owner = THIS_MODULE,
.open = snmp6_seq_open,
.read = seq_read,
.llseek = seq_lseek,
.release = single_release,
};
int snmp6_register_dev(struct inet6_dev *idev)
{
struct proc_dir_entry *p;
if (!idev || !idev->dev)
return -EINVAL;
if (!proc_net_devsnmp6)
return -ENOENT;
p = create_proc_entry(idev->dev->name, S_IRUGO, proc_net_devsnmp6);
if (!p)
return -ENOMEM;
p->data = idev;
p->proc_fops = &snmp6_seq_fops;
idev->stats.proc_dir_entry = p;
return 0;
}
int snmp6_unregister_dev(struct inet6_dev *idev)
{
if (!proc_net_devsnmp6)
return -ENOENT;
if (!idev || !idev->stats.proc_dir_entry)
return -EINVAL;
remove_proc_entry(idev->stats.proc_dir_entry->name,
proc_net_devsnmp6);
idev->stats.proc_dir_entry = NULL;
return 0;
}
int __init ipv6_misc_proc_init(void)
{
int rc = 0;
if (!proc_net_fops_create("snmp6", S_IRUGO, &snmp6_seq_fops))
goto proc_snmp6_fail;
proc_net_devsnmp6 = proc_mkdir("dev_snmp6", proc_net);
if (!proc_net_devsnmp6)
goto proc_dev_snmp6_fail;
if (!proc_net_fops_create("sockstat6", S_IRUGO, &sockstat6_seq_fops))
goto proc_sockstat6_fail;
out:
return rc;
proc_sockstat6_fail:
proc_net_remove("dev_snmp6");
proc_dev_snmp6_fail:
proc_net_remove("snmp6");
proc_snmp6_fail:
rc = -ENOMEM;
goto out;
}
void ipv6_misc_proc_exit(void)
{
proc_net_remove("sockstat6");
proc_net_remove("dev_snmp6");
proc_net_remove("snmp6");
}
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