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. It is mainly used for debugging and
- * statistics.
- *
- * Version: $Id: proc.c,v 1.45 2001/05/16 16:45:35 davem Exp $
- *
- * Authors: Fred N. van Kempen, <waltje@uWalt.NL.Mugnet.ORG>
- * Gerald J. Heim, <heim@peanuts.informatik.uni-tuebingen.de>
- * Fred Baumgarten, <dc6iq@insu1.etec.uni-karlsruhe.de>
- * Erik Schoenfelder, <schoenfr@ibr.cs.tu-bs.de>
- *
- * Fixes:
- * Alan Cox : UDP sockets show the rxqueue/txqueue
- * using hint flag for the netinfo.
- * Pauline Middelink : identd support
- * Alan Cox : Make /proc safer.
- * Erik Schoenfelder : /proc/net/snmp
- * Alan Cox : Handle dead sockets properly.
- * Gerhard Koerting : Show both timers
- * Alan Cox : Allow inode to be NULL (kernel socket)
- * Andi Kleen : Add support for open_requests and
- * split functions for more readibility.
- * Andi Kleen : Add support for /proc/net/netstat
- *
- * 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 <asm/system.h>
- #include <linux/sched.h>
- #include <linux/socket.h>
- #include <linux/net.h>
- #include <linux/un.h>
- #include <linux/in.h>
- #include <linux/param.h>
- #include <linux/inet.h>
- #include <linux/netdevice.h>
- #include <net/ip.h>
- #include <net/icmp.h>
- #include <net/protocol.h>
- #include <net/tcp.h>
- #include <net/udp.h>
- #include <linux/skbuff.h>
- #include <net/sock.h>
- #include <net/raw.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;
- }
- /*
- * Report socket allocation statistics [mea@utu.fi]
- */
- int afinet_get_info(char *buffer, char **start, off_t offset, int length)
- {
- /* From net/socket.c */
- extern int socket_get_info(char *, char **, off_t, int);
- int len = socket_get_info(buffer,start,offset,length);
- len += sprintf(buffer+len,"TCP: inuse %d orphan %d tw %d alloc %d mem %dn",
- fold_prot_inuse(&tcp_prot),
- atomic_read(&tcp_orphan_count), tcp_tw_count,
- atomic_read(&tcp_sockets_allocated),
- atomic_read(&tcp_memory_allocated));
- len += sprintf(buffer+len,"UDP: inuse %dn",
- fold_prot_inuse(&udp_prot));
- len += sprintf(buffer+len,"RAW: inuse %dn",
- fold_prot_inuse(&raw_prot));
- len += sprintf(buffer+len, "FRAG: inuse %d memory %dn",
- ip_frag_nqueues, atomic_read(&ip_frag_mem));
- if (offset >= len)
- {
- *start = buffer;
- return 0;
- }
- *start = buffer + offset;
- len -= offset;
- if (len > length)
- len = length;
- if (len < 0)
- len = 0;
- return len;
- }
- static unsigned long fold_field(unsigned long *begin, int sz, int nr)
- {
- unsigned long res = 0;
- int i;
- sz /= sizeof(unsigned long);
- for (i=0; i<smp_num_cpus; i++) {
- res += begin[2*cpu_logical_map(i)*sz + nr];
- res += begin[(2*cpu_logical_map(i)+1)*sz + nr];
- }
- return res;
- }
- /*
- * Called from the PROCfs module. This outputs /proc/net/snmp.
- */
-
- int snmp_get_info(char *buffer, char **start, off_t offset, int length)
- {
- extern int sysctl_ip_default_ttl;
- int len, i;
- len = sprintf (buffer,
- "Ip: Forwarding DefaultTTL InReceives InHdrErrors InAddrErrors ForwDatagrams InUnknownProtos InDiscards InDelivers OutRequests OutDiscards OutNoRoutes ReasmTimeout ReasmReqds ReasmOKs ReasmFails FragOKs FragFails FragCreatesn"
- "Ip: %d %d", ipv4_devconf.forwarding ? 1 : 2, sysctl_ip_default_ttl);
- for (i=0; i<offsetof(struct ip_mib, __pad)/sizeof(unsigned long); i++)
- len += sprintf(buffer+len, " %lu", fold_field((unsigned long*)ip_statistics, sizeof(struct ip_mib), i));
- len += sprintf (buffer + len,
- "nIcmp: InMsgs InErrors InDestUnreachs InTimeExcds InParmProbs InSrcQuenchs InRedirects InEchos InEchoReps InTimestamps InTimestampReps InAddrMasks InAddrMaskReps OutMsgs OutErrors OutDestUnreachs OutTimeExcds OutParmProbs OutSrcQuenchs OutRedirects OutEchos OutEchoReps OutTimestamps OutTimestampReps OutAddrMasks OutAddrMaskRepsn"
- "Icmp:");
- for (i=0; i<offsetof(struct icmp_mib, __pad)/sizeof(unsigned long); i++)
- len += sprintf(buffer+len, " %lu", fold_field((unsigned long*)icmp_statistics, sizeof(struct icmp_mib), i));
- len += sprintf (buffer + len,
- "nTcp: RtoAlgorithm RtoMin RtoMax MaxConn ActiveOpens PassiveOpens AttemptFails EstabResets CurrEstab InSegs OutSegs RetransSegs InErrs OutRstsn"
- "Tcp:");
- for (i=0; i<offsetof(struct tcp_mib, __pad)/sizeof(unsigned long); i++)
- len += sprintf(buffer+len, " %lu", fold_field((unsigned long*)tcp_statistics, sizeof(struct tcp_mib), i));
- len += sprintf (buffer + len,
- "nUdp: InDatagrams NoPorts InErrors OutDatagramsn"
- "Udp:");
- for (i=0; i<offsetof(struct udp_mib, __pad)/sizeof(unsigned long); i++)
- len += sprintf(buffer+len, " %lu", fold_field((unsigned long*)udp_statistics, sizeof(struct udp_mib), i));
- len += sprintf (buffer + len, "n");
- if (offset >= len)
- {
- *start = buffer;
- return 0;
- }
- *start = buffer + offset;
- len -= offset;
- if (len > length)
- len = length;
- if (len < 0)
- len = 0;
- return len;
- }
- /*
- * Output /proc/net/netstat
- */
-
- int netstat_get_info(char *buffer, char **start, off_t offset, int length)
- {
- int len, i;
- len = sprintf(buffer,
- "TcpExt: SyncookiesSent SyncookiesRecv SyncookiesFailed"
- " EmbryonicRsts PruneCalled RcvPruned OfoPruned"
- " OutOfWindowIcmps LockDroppedIcmps ArpFilter"
- " TW TWRecycled TWKilled"
- " PAWSPassive PAWSActive PAWSEstab"
- " DelayedACKs DelayedACKLocked DelayedACKLost"
- " ListenOverflows ListenDrops"
- " TCPPrequeued TCPDirectCopyFromBacklog"
- " TCPDirectCopyFromPrequeue TCPPrequeueDropped"
- " TCPHPHits TCPHPHitsToUser"
- " TCPPureAcks TCPHPAcks"
- " TCPRenoRecovery TCPSackRecovery"
- " TCPSACKReneging"
- " TCPFACKReorder TCPSACKReorder TCPRenoReorder TCPTSReorder"
- " TCPFullUndo TCPPartialUndo TCPDSACKUndo TCPLossUndo"
- " TCPLoss TCPLostRetransmit"
- " TCPRenoFailures TCPSackFailures TCPLossFailures"
- " TCPFastRetrans TCPForwardRetrans TCPSlowStartRetrans"
- " TCPTimeouts"
- " TCPRenoRecoveryFail TCPSackRecoveryFail"
- " TCPSchedulerFailed TCPRcvCollapsed"
- " TCPDSACKOldSent TCPDSACKOfoSent TCPDSACKRecv TCPDSACKOfoRecv"
- " TCPAbortOnSyn TCPAbortOnData TCPAbortOnClose"
- " TCPAbortOnMemory TCPAbortOnTimeout TCPAbortOnLinger"
- " TCPAbortFailed TCPMemoryPressuresn"
- "TcpExt:");
- for (i=0; i<offsetof(struct linux_mib, __pad)/sizeof(unsigned long); i++)
- len += sprintf(buffer+len, " %lu", fold_field((unsigned long*)net_statistics, sizeof(struct linux_mib), i));
- len += sprintf (buffer + len, "n");
- if (offset >= len)
- {
- *start = buffer;
- return 0;
- }
- *start = buffer + offset;
- len -= offset;
- if (len > length)
- len = length;
- if (len < 0)
- len = 0;
- return len;
- }