proc.c
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上传日期:2013-02-24
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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 1.15.2.1 2002/01/24 15:46:07 davem Exp $
- *
- * Authors: David S. Miller (davem@caip.rutgers.edu)
- *
- * 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/sched.h>
- #include <linux/socket.h>
- #include <linux/net.h>
- #include <linux/in6.h>
- #include <linux/stddef.h>
- #include <net/sock.h>
- #include <net/tcp.h>
- #include <net/transp_v6.h>
- #include <net/ipv6.h>
- static int fold_prot_inuse(struct proto *proto)
- {
- int res = 0;
- int cpu;
- for (cpu=0; cpu<smp_num_cpus; cpu++)
- res += proto->stats[cpu_logical_map(cpu)].inuse;
- return res;
- }
- int afinet6_get_info(char *buffer, char **start, off_t offset, int length)
- {
- int len = 0;
- len += sprintf(buffer+len, "TCP6: inuse %dn",
- fold_prot_inuse(&tcpv6_prot));
- len += sprintf(buffer+len, "UDP6: inuse %dn",
- fold_prot_inuse(&udpv6_prot));
- len += sprintf(buffer+len, "RAW6: inuse %dn",
- fold_prot_inuse(&rawv6_prot));
- len += sprintf(buffer+len, "FRAG6: inuse %d memory %dn",
- ip6_frag_nqueues, atomic_read(&ip6_frag_mem));
- *start = buffer + offset;
- len -= offset;
- if(len > length)
- len = length;
- return len;
- }
- struct snmp6_item
- {
- char *name;
- unsigned long *ptr;
- int mibsize;
- } snmp6_list[] = {
- /* ipv6 mib according to draft-ietf-ipngwg-ipv6-mib-04 */
- #define SNMP6_GEN(x) { #x , &ipv6_statistics[0].x, sizeof(struct ipv6_mib)/sizeof(unsigned long) }
- SNMP6_GEN(Ip6InReceives),
- SNMP6_GEN(Ip6InHdrErrors),
- SNMP6_GEN(Ip6InTooBigErrors),
- SNMP6_GEN(Ip6InNoRoutes),
- SNMP6_GEN(Ip6InAddrErrors),
- SNMP6_GEN(Ip6InUnknownProtos),
- SNMP6_GEN(Ip6InTruncatedPkts),
- SNMP6_GEN(Ip6InDiscards),
- SNMP6_GEN(Ip6InDelivers),
- SNMP6_GEN(Ip6OutForwDatagrams),
- SNMP6_GEN(Ip6OutRequests),
- SNMP6_GEN(Ip6OutDiscards),
- SNMP6_GEN(Ip6OutNoRoutes),
- SNMP6_GEN(Ip6ReasmTimeout),
- SNMP6_GEN(Ip6ReasmReqds),
- SNMP6_GEN(Ip6ReasmOKs),
- SNMP6_GEN(Ip6ReasmFails),
- SNMP6_GEN(Ip6FragOKs),
- SNMP6_GEN(Ip6FragFails),
- SNMP6_GEN(Ip6FragCreates),
- SNMP6_GEN(Ip6InMcastPkts),
- SNMP6_GEN(Ip6OutMcastPkts),
- #undef SNMP6_GEN
- /* icmpv6 mib according to draft-ietf-ipngwg-ipv6-icmp-mib-02
- 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.
- */
- #define SNMP6_GEN(x) { #x , &icmpv6_statistics[0].x, sizeof(struct icmpv6_mib)/sizeof(unsigned long) }
- SNMP6_GEN(Icmp6InMsgs),
- SNMP6_GEN(Icmp6InErrors),
- SNMP6_GEN(Icmp6InDestUnreachs),
- SNMP6_GEN(Icmp6InPktTooBigs),
- SNMP6_GEN(Icmp6InTimeExcds),
- SNMP6_GEN(Icmp6InParmProblems),
- SNMP6_GEN(Icmp6InEchos),
- SNMP6_GEN(Icmp6InEchoReplies),
- SNMP6_GEN(Icmp6InGroupMembQueries),
- SNMP6_GEN(Icmp6InGroupMembResponses),
- SNMP6_GEN(Icmp6InGroupMembReductions),
- SNMP6_GEN(Icmp6InRouterSolicits),
- SNMP6_GEN(Icmp6InRouterAdvertisements),
- SNMP6_GEN(Icmp6InNeighborSolicits),
- SNMP6_GEN(Icmp6InNeighborAdvertisements),
- SNMP6_GEN(Icmp6InRedirects),
- SNMP6_GEN(Icmp6OutMsgs),
- SNMP6_GEN(Icmp6OutDestUnreachs),
- SNMP6_GEN(Icmp6OutPktTooBigs),
- SNMP6_GEN(Icmp6OutTimeExcds),
- SNMP6_GEN(Icmp6OutParmProblems),
- SNMP6_GEN(Icmp6OutEchoReplies),
- SNMP6_GEN(Icmp6OutRouterSolicits),
- SNMP6_GEN(Icmp6OutNeighborSolicits),
- SNMP6_GEN(Icmp6OutNeighborAdvertisements),
- SNMP6_GEN(Icmp6OutRedirects),
- SNMP6_GEN(Icmp6OutGroupMembResponses),
- SNMP6_GEN(Icmp6OutGroupMembReductions),
- #undef SNMP6_GEN
- #define SNMP6_GEN(x) { "Udp6" #x , &udp_stats_in6[0].Udp##x, sizeof(struct udp_mib)/sizeof(unsigned long) }
- SNMP6_GEN(InDatagrams),
- SNMP6_GEN(NoPorts),
- SNMP6_GEN(InErrors),
- SNMP6_GEN(OutDatagrams)
- #undef SNMP6_GEN
- };
- static unsigned long fold_field(unsigned long *ptr, int size)
- {
- unsigned long res = 0;
- int i;
- for (i=0; i<smp_num_cpus; i++) {
- res += ptr[2*cpu_logical_map(i)*size];
- res += ptr[(2*cpu_logical_map(i)+1)*size];
- }
- return res;
- }
- int afinet6_get_snmp(char *buffer, char **start, off_t offset, int length)
- {
- int len = 0;
- int i;
- for (i=0; i<sizeof(snmp6_list)/sizeof(snmp6_list[0]); i++)
- len += sprintf(buffer+len, "%-32st%ldn", snmp6_list[i].name,
- fold_field(snmp6_list[i].ptr, snmp6_list[i].mibsize));
- len -= offset;
- if (len > length)
- len = length;
- if(len < 0)
- len = 0;
- *start = buffer + offset;
- return len;
- }