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https://github.com/torvalds/linux
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4ce3c183fc
/proc/net/snmp and /proc/net/netstat expose SNMP counters.
Width of these counters is either 32 or 64 bits, depending on the size
of "unsigned long" in kernel.
This means user program parsing these files must already be prepared to
deal with 64bit values, regardless of user program being 32 or 64 bit.
This patch introduces 64bit snmp values for IPSTAT mib, where some
counters can wrap pretty fast if they are 32bit wide.
# netstat -s|egrep "InOctets|OutOctets"
InOctets: 244068329096
OutOctets: 244069348848
Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
326 lines
10 KiB
C
326 lines
10 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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* 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/net_namespace.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/udp.h>
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#include <net/transp_v6.h>
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#include <net/ipv6.h>
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static int sockstat6_seq_show(struct seq_file *seq, void *v)
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{
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struct net *net = seq->private;
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seq_printf(seq, "TCP6: inuse %d\n",
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sock_prot_inuse_get(net, &tcpv6_prot));
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seq_printf(seq, "UDP6: inuse %d\n",
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sock_prot_inuse_get(net, &udpv6_prot));
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seq_printf(seq, "UDPLITE6: inuse %d\n",
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sock_prot_inuse_get(net, &udplitev6_prot));
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seq_printf(seq, "RAW6: inuse %d\n",
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sock_prot_inuse_get(net, &rawv6_prot));
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seq_printf(seq, "FRAG6: inuse %d memory %d\n",
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ip6_frag_nqueues(net), ip6_frag_mem(net));
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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_net(inode, file, sockstat6_seq_show);
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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_net,
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};
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static const 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_INPKTS),
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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_OUTPKTS),
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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_ITEM("Ip6InOctets", IPSTATS_MIB_INOCTETS),
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SNMP_MIB_ITEM("Ip6OutOctets", IPSTATS_MIB_OUTOCTETS),
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SNMP_MIB_ITEM("Ip6InMcastOctets", IPSTATS_MIB_INMCASTOCTETS),
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SNMP_MIB_ITEM("Ip6OutMcastOctets", IPSTATS_MIB_OUTMCASTOCTETS),
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SNMP_MIB_ITEM("Ip6InBcastOctets", IPSTATS_MIB_INBCASTOCTETS),
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SNMP_MIB_ITEM("Ip6OutBcastOctets", IPSTATS_MIB_OUTBCASTOCTETS),
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SNMP_MIB_SENTINEL
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};
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static const struct snmp_mib snmp6_icmp6_list[] = {
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/* icmpv6 mib according to RFC 2466 */
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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("Icmp6OutMsgs", ICMP6_MIB_OUTMSGS),
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SNMP_MIB_ITEM("Icmp6OutErrors", ICMP6_MIB_OUTERRORS),
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SNMP_MIB_SENTINEL
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};
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/* RFC 4293 v6 ICMPMsgStatsTable; named items for RFC 2466 compatibility */
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static const char *const icmp6type2name[256] = {
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[ICMPV6_DEST_UNREACH] = "DestUnreachs",
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[ICMPV6_PKT_TOOBIG] = "PktTooBigs",
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[ICMPV6_TIME_EXCEED] = "TimeExcds",
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[ICMPV6_PARAMPROB] = "ParmProblems",
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[ICMPV6_ECHO_REQUEST] = "Echos",
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[ICMPV6_ECHO_REPLY] = "EchoReplies",
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[ICMPV6_MGM_QUERY] = "GroupMembQueries",
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[ICMPV6_MGM_REPORT] = "GroupMembResponses",
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[ICMPV6_MGM_REDUCTION] = "GroupMembReductions",
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[ICMPV6_MLD2_REPORT] = "MLDv2Reports",
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[NDISC_ROUTER_ADVERTISEMENT] = "RouterAdvertisements",
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[NDISC_ROUTER_SOLICITATION] = "RouterSolicits",
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[NDISC_NEIGHBOUR_ADVERTISEMENT] = "NeighborAdvertisements",
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[NDISC_NEIGHBOUR_SOLICITATION] = "NeighborSolicits",
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[NDISC_REDIRECT] = "Redirects",
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};
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static const 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 const 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 void snmp6_seq_show_icmpv6msg(struct seq_file *seq, void __percpu **mib)
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{
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char name[32];
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int i;
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/* print by name -- deprecated items */
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for (i = 0; i < ICMP6MSG_MIB_MAX; i++) {
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int icmptype;
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const char *p;
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icmptype = i & 0xff;
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p = icmp6type2name[icmptype];
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if (!p) /* don't print un-named types here */
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continue;
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snprintf(name, sizeof(name), "Icmp6%s%s",
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i & 0x100 ? "Out" : "In", p);
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seq_printf(seq, "%-32s\t%lu\n", name,
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snmp_fold_field(mib, i));
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}
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/* print by number (nonzero only) - ICMPMsgStat format */
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for (i = 0; i < ICMP6MSG_MIB_MAX; i++) {
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unsigned long val;
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val = snmp_fold_field(mib, i);
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if (!val)
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continue;
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snprintf(name, sizeof(name), "Icmp6%sType%u",
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i & 0x100 ? "Out" : "In", i & 0xff);
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seq_printf(seq, "%-32s\t%lu\n", name, val);
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}
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}
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static void snmp6_seq_show_item(struct seq_file *seq, void __percpu **mib,
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const 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 void snmp6_seq_show_item64(struct seq_file *seq, void __percpu **mib,
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const struct snmp_mib *itemlist, size_t syncpoff)
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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%llu\n", itemlist[i].name,
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snmp_fold_field64(mib, itemlist[i].entry, syncpoff));
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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 net *net = (struct net *)seq->private;
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snmp6_seq_show_item64(seq, (void __percpu **)net->mib.ipv6_statistics,
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snmp6_ipstats_list, offsetof(struct ipstats_mib, syncp));
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snmp6_seq_show_item(seq, (void __percpu **)net->mib.icmpv6_statistics,
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snmp6_icmp6_list);
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snmp6_seq_show_icmpv6msg(seq,
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(void __percpu **)net->mib.icmpv6msg_statistics);
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snmp6_seq_show_item(seq, (void __percpu **)net->mib.udp_stats_in6,
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snmp6_udp6_list);
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snmp6_seq_show_item(seq, (void __percpu **)net->mib.udplite_stats_in6,
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snmp6_udplite6_list);
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return 0;
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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_net(inode, file, snmp6_seq_show);
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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_net,
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};
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static int snmp6_dev_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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seq_printf(seq, "%-32s\t%u\n", "ifIndex", idev->dev->ifindex);
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snmp6_seq_show_item(seq, (void __percpu **)idev->stats.ipv6,
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snmp6_ipstats_list);
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snmp6_seq_show_item(seq, (void __percpu **)idev->stats.icmpv6,
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snmp6_icmp6_list);
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snmp6_seq_show_icmpv6msg(seq, (void __percpu **)idev->stats.icmpv6msg);
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return 0;
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}
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static int snmp6_dev_seq_open(struct inode *inode, struct file *file)
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{
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return single_open(file, snmp6_dev_seq_show, PDE(inode)->data);
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}
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static const struct file_operations snmp6_dev_seq_fops = {
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.owner = THIS_MODULE,
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.open = snmp6_dev_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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struct net *net;
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if (!idev || !idev->dev)
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return -EINVAL;
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net = dev_net(idev->dev);
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if (!net->mib.proc_net_devsnmp6)
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return -ENOENT;
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p = proc_create_data(idev->dev->name, S_IRUGO,
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net->mib.proc_net_devsnmp6,
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&snmp6_dev_seq_fops, idev);
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if (!p)
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return -ENOMEM;
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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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struct net *net = dev_net(idev->dev);
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if (!net->mib.proc_net_devsnmp6)
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return -ENOENT;
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if (!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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net->mib.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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static int __net_init ipv6_proc_init_net(struct net *net)
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{
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if (!proc_net_fops_create(net, "sockstat6", S_IRUGO,
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&sockstat6_seq_fops))
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return -ENOMEM;
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if (!proc_net_fops_create(net, "snmp6", S_IRUGO, &snmp6_seq_fops))
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goto proc_snmp6_fail;
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net->mib.proc_net_devsnmp6 = proc_mkdir("dev_snmp6", net->proc_net);
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if (!net->mib.proc_net_devsnmp6)
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goto proc_dev_snmp6_fail;
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return 0;
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proc_snmp6_fail:
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proc_net_remove(net, "sockstat6");
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proc_dev_snmp6_fail:
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proc_net_remove(net, "dev_snmp6");
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return -ENOMEM;
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}
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static void __net_exit ipv6_proc_exit_net(struct net *net)
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{
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proc_net_remove(net, "sockstat6");
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proc_net_remove(net, "dev_snmp6");
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proc_net_remove(net, "snmp6");
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}
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static struct pernet_operations ipv6_proc_ops = {
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.init = ipv6_proc_init_net,
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.exit = ipv6_proc_exit_net,
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};
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int __init ipv6_misc_proc_init(void)
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{
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return register_pernet_subsys(&ipv6_proc_ops);
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}
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void ipv6_misc_proc_exit(void)
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{
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unregister_pernet_subsys(&ipv6_proc_ops);
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}
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