5632c5152a
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>
261 lines
8.6 KiB
C
261 lines
8.6 KiB
C
/*
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* INET An implementation of the TCP/IP protocol suite for the LINUX
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* operating system. INET is implemented using the BSD Socket
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* interface as the means of communication with the user level.
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*
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* This file implements the various access functions for the
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* PROC file system. This is very similar to the IPv4 version,
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* except it reports the sockets in the INET6 address family.
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*
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* Version: $Id: proc.c,v 1.17 2002/02/01 22:01:04 davem Exp $
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*
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* Authors: David S. Miller (davem@caip.rutgers.edu)
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* YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org>
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version
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* 2 of the License, or (at your option) any later version.
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*/
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#include <linux/socket.h>
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#include <linux/net.h>
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#include <linux/ipv6.h>
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#include <linux/proc_fs.h>
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#include <linux/seq_file.h>
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#include <linux/stddef.h>
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#include <net/ip.h>
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#include <net/sock.h>
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#include <net/tcp.h>
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#include <net/transp_v6.h>
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#include <net/ipv6.h>
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static struct proc_dir_entry *proc_net_devsnmp6;
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static int fold_prot_inuse(struct proto *proto)
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{
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int res = 0;
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int cpu;
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for_each_possible_cpu(cpu)
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res += proto->stats[cpu].inuse;
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return res;
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}
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static int sockstat6_seq_show(struct seq_file *seq, void *v)
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{
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seq_printf(seq, "TCP6: inuse %d\n",
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fold_prot_inuse(&tcpv6_prot));
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seq_printf(seq, "UDP6: inuse %d\n",
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fold_prot_inuse(&udpv6_prot));
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seq_printf(seq, "UDPLITE6: inuse %d\n",
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fold_prot_inuse(&udplitev6_prot));
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seq_printf(seq, "RAW6: inuse %d\n",
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fold_prot_inuse(&rawv6_prot));
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seq_printf(seq, "FRAG6: inuse %d memory %d\n",
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ip6_frag_nqueues, atomic_read(&ip6_frag_mem));
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return 0;
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}
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static struct snmp_mib snmp6_ipstats_list[] = {
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/* ipv6 mib according to RFC 2465 */
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SNMP_MIB_ITEM("Ip6InReceives", IPSTATS_MIB_INRECEIVES),
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SNMP_MIB_ITEM("Ip6InHdrErrors", IPSTATS_MIB_INHDRERRORS),
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SNMP_MIB_ITEM("Ip6InTooBigErrors", IPSTATS_MIB_INTOOBIGERRORS),
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SNMP_MIB_ITEM("Ip6InNoRoutes", IPSTATS_MIB_INNOROUTES),
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SNMP_MIB_ITEM("Ip6InAddrErrors", IPSTATS_MIB_INADDRERRORS),
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SNMP_MIB_ITEM("Ip6InUnknownProtos", IPSTATS_MIB_INUNKNOWNPROTOS),
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SNMP_MIB_ITEM("Ip6InTruncatedPkts", IPSTATS_MIB_INTRUNCATEDPKTS),
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SNMP_MIB_ITEM("Ip6InDiscards", IPSTATS_MIB_INDISCARDS),
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SNMP_MIB_ITEM("Ip6InDelivers", IPSTATS_MIB_INDELIVERS),
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SNMP_MIB_ITEM("Ip6OutForwDatagrams", IPSTATS_MIB_OUTFORWDATAGRAMS),
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SNMP_MIB_ITEM("Ip6OutRequests", IPSTATS_MIB_OUTREQUESTS),
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SNMP_MIB_ITEM("Ip6OutDiscards", IPSTATS_MIB_OUTDISCARDS),
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SNMP_MIB_ITEM("Ip6OutNoRoutes", IPSTATS_MIB_OUTNOROUTES),
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SNMP_MIB_ITEM("Ip6ReasmTimeout", IPSTATS_MIB_REASMTIMEOUT),
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SNMP_MIB_ITEM("Ip6ReasmReqds", IPSTATS_MIB_REASMREQDS),
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SNMP_MIB_ITEM("Ip6ReasmOKs", IPSTATS_MIB_REASMOKS),
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SNMP_MIB_ITEM("Ip6ReasmFails", IPSTATS_MIB_REASMFAILS),
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SNMP_MIB_ITEM("Ip6FragOKs", IPSTATS_MIB_FRAGOKS),
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SNMP_MIB_ITEM("Ip6FragFails", IPSTATS_MIB_FRAGFAILS),
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SNMP_MIB_ITEM("Ip6FragCreates", IPSTATS_MIB_FRAGCREATES),
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SNMP_MIB_ITEM("Ip6InMcastPkts", IPSTATS_MIB_INMCASTPKTS),
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SNMP_MIB_ITEM("Ip6OutMcastPkts", IPSTATS_MIB_OUTMCASTPKTS),
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SNMP_MIB_SENTINEL
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};
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static struct snmp_mib snmp6_icmp6_list[] = {
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/* icmpv6 mib according to RFC 2466
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Exceptions: {In|Out}AdminProhibs are removed, because I see
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no good reasons to account them separately
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of another dest.unreachs.
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OutErrs is zero identically.
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OutEchos too.
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OutRouterAdvertisements too.
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OutGroupMembQueries too.
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*/
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SNMP_MIB_ITEM("Icmp6InMsgs", ICMP6_MIB_INMSGS),
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SNMP_MIB_ITEM("Icmp6InErrors", ICMP6_MIB_INERRORS),
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SNMP_MIB_ITEM("Icmp6InDestUnreachs", ICMP6_MIB_INDESTUNREACHS),
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SNMP_MIB_ITEM("Icmp6InPktTooBigs", ICMP6_MIB_INPKTTOOBIGS),
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SNMP_MIB_ITEM("Icmp6InTimeExcds", ICMP6_MIB_INTIMEEXCDS),
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SNMP_MIB_ITEM("Icmp6InParmProblems", ICMP6_MIB_INPARMPROBLEMS),
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SNMP_MIB_ITEM("Icmp6InEchos", ICMP6_MIB_INECHOS),
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SNMP_MIB_ITEM("Icmp6InEchoReplies", ICMP6_MIB_INECHOREPLIES),
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SNMP_MIB_ITEM("Icmp6InGroupMembQueries", ICMP6_MIB_INGROUPMEMBQUERIES),
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SNMP_MIB_ITEM("Icmp6InGroupMembResponses", ICMP6_MIB_INGROUPMEMBRESPONSES),
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SNMP_MIB_ITEM("Icmp6InGroupMembReductions", ICMP6_MIB_INGROUPMEMBREDUCTIONS),
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SNMP_MIB_ITEM("Icmp6InRouterSolicits", ICMP6_MIB_INROUTERSOLICITS),
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SNMP_MIB_ITEM("Icmp6InRouterAdvertisements", ICMP6_MIB_INROUTERADVERTISEMENTS),
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SNMP_MIB_ITEM("Icmp6InNeighborSolicits", ICMP6_MIB_INNEIGHBORSOLICITS),
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SNMP_MIB_ITEM("Icmp6InNeighborAdvertisements", ICMP6_MIB_INNEIGHBORADVERTISEMENTS),
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SNMP_MIB_ITEM("Icmp6InRedirects", ICMP6_MIB_INREDIRECTS),
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SNMP_MIB_ITEM("Icmp6OutMsgs", ICMP6_MIB_OUTMSGS),
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SNMP_MIB_ITEM("Icmp6OutDestUnreachs", ICMP6_MIB_OUTDESTUNREACHS),
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SNMP_MIB_ITEM("Icmp6OutPktTooBigs", ICMP6_MIB_OUTPKTTOOBIGS),
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SNMP_MIB_ITEM("Icmp6OutTimeExcds", ICMP6_MIB_OUTTIMEEXCDS),
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SNMP_MIB_ITEM("Icmp6OutParmProblems", ICMP6_MIB_OUTPARMPROBLEMS),
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SNMP_MIB_ITEM("Icmp6OutEchoReplies", ICMP6_MIB_OUTECHOREPLIES),
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SNMP_MIB_ITEM("Icmp6OutRouterSolicits", ICMP6_MIB_OUTROUTERSOLICITS),
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SNMP_MIB_ITEM("Icmp6OutNeighborSolicits", ICMP6_MIB_OUTNEIGHBORSOLICITS),
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SNMP_MIB_ITEM("Icmp6OutNeighborAdvertisements", ICMP6_MIB_OUTNEIGHBORADVERTISEMENTS),
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SNMP_MIB_ITEM("Icmp6OutRedirects", ICMP6_MIB_OUTREDIRECTS),
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SNMP_MIB_ITEM("Icmp6OutGroupMembResponses", ICMP6_MIB_OUTGROUPMEMBRESPONSES),
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SNMP_MIB_ITEM("Icmp6OutGroupMembReductions", ICMP6_MIB_OUTGROUPMEMBREDUCTIONS),
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SNMP_MIB_SENTINEL
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};
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static struct snmp_mib snmp6_udp6_list[] = {
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SNMP_MIB_ITEM("Udp6InDatagrams", UDP_MIB_INDATAGRAMS),
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SNMP_MIB_ITEM("Udp6NoPorts", UDP_MIB_NOPORTS),
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SNMP_MIB_ITEM("Udp6InErrors", UDP_MIB_INERRORS),
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SNMP_MIB_ITEM("Udp6OutDatagrams", UDP_MIB_OUTDATAGRAMS),
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SNMP_MIB_SENTINEL
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};
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static struct snmp_mib snmp6_udplite6_list[] = {
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SNMP_MIB_ITEM("UdpLite6InDatagrams", UDP_MIB_INDATAGRAMS),
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SNMP_MIB_ITEM("UdpLite6NoPorts", UDP_MIB_NOPORTS),
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SNMP_MIB_ITEM("UdpLite6InErrors", UDP_MIB_INERRORS),
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SNMP_MIB_ITEM("UdpLite6OutDatagrams", UDP_MIB_OUTDATAGRAMS),
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SNMP_MIB_SENTINEL
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};
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static inline void
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snmp6_seq_show_item(struct seq_file *seq, void **mib, struct snmp_mib *itemlist)
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{
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int i;
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for (i=0; itemlist[i].name; i++)
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seq_printf(seq, "%-32s\t%lu\n", itemlist[i].name,
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snmp_fold_field(mib, itemlist[i].entry));
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}
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static int snmp6_seq_show(struct seq_file *seq, void *v)
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{
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struct inet6_dev *idev = (struct inet6_dev *)seq->private;
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if (idev) {
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seq_printf(seq, "%-32s\t%u\n", "ifIndex", idev->dev->ifindex);
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snmp6_seq_show_item(seq, (void **)idev->stats.ipv6, snmp6_ipstats_list);
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snmp6_seq_show_item(seq, (void **)idev->stats.icmpv6, snmp6_icmp6_list);
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} else {
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snmp6_seq_show_item(seq, (void **)ipv6_statistics, snmp6_ipstats_list);
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snmp6_seq_show_item(seq, (void **)icmpv6_statistics, snmp6_icmp6_list);
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snmp6_seq_show_item(seq, (void **)udp_stats_in6, snmp6_udp6_list);
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snmp6_seq_show_item(seq, (void **)udplite_stats_in6, snmp6_udplite6_list);
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}
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return 0;
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}
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static int sockstat6_seq_open(struct inode *inode, struct file *file)
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{
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return single_open(file, sockstat6_seq_show, NULL);
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}
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static const struct file_operations sockstat6_seq_fops = {
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.owner = THIS_MODULE,
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.open = sockstat6_seq_open,
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.read = seq_read,
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.llseek = seq_lseek,
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.release = single_release,
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};
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static int snmp6_seq_open(struct inode *inode, struct file *file)
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{
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return single_open(file, snmp6_seq_show, PDE(inode)->data);
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}
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static const struct file_operations snmp6_seq_fops = {
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.owner = THIS_MODULE,
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.open = snmp6_seq_open,
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.read = seq_read,
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.llseek = seq_lseek,
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.release = single_release,
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};
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int snmp6_register_dev(struct inet6_dev *idev)
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{
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struct proc_dir_entry *p;
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if (!idev || !idev->dev)
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return -EINVAL;
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if (!proc_net_devsnmp6)
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return -ENOENT;
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p = create_proc_entry(idev->dev->name, S_IRUGO, proc_net_devsnmp6);
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if (!p)
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return -ENOMEM;
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p->data = idev;
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p->proc_fops = &snmp6_seq_fops;
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idev->stats.proc_dir_entry = p;
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return 0;
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}
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int snmp6_unregister_dev(struct inet6_dev *idev)
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{
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if (!proc_net_devsnmp6)
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return -ENOENT;
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if (!idev || !idev->stats.proc_dir_entry)
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return -EINVAL;
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remove_proc_entry(idev->stats.proc_dir_entry->name,
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proc_net_devsnmp6);
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idev->stats.proc_dir_entry = NULL;
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return 0;
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}
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int __init ipv6_misc_proc_init(void)
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{
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int rc = 0;
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if (!proc_net_fops_create("snmp6", S_IRUGO, &snmp6_seq_fops))
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goto proc_snmp6_fail;
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proc_net_devsnmp6 = proc_mkdir("dev_snmp6", proc_net);
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if (!proc_net_devsnmp6)
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goto proc_dev_snmp6_fail;
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if (!proc_net_fops_create("sockstat6", S_IRUGO, &sockstat6_seq_fops))
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goto proc_sockstat6_fail;
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out:
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return rc;
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proc_sockstat6_fail:
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proc_net_remove("dev_snmp6");
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proc_dev_snmp6_fail:
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proc_net_remove("snmp6");
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proc_snmp6_fail:
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rc = -ENOMEM;
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goto out;
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}
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void ipv6_misc_proc_exit(void)
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{
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proc_net_remove("sockstat6");
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proc_net_remove("dev_snmp6");
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proc_net_remove("snmp6");
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}
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