From 849369d6c66d3054688672f97d31fceb8e8230fb Mon Sep 17 00:00:00 2001
From: root <root@artemis.panaceas.org>
Date: Fri, 25 Dec 2015 04:40:36 +0000
Subject: initial_commit
---
net/ipv4/proc.c | 495 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++
1 file changed, 495 insertions(+)
create mode 100644 net/ipv4/proc.c
(limited to 'net/ipv4/proc.c')
diff --git a/net/ipv4/proc.c b/net/ipv4/proc.c
new file mode 100644
index 00000000..b14ec7d0
--- /dev/null
+++ b/net/ipv4/proc.c
@@ -0,0 +1,495 @@
+/*
+ * 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.
+ *
+ * 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
+ * Arnaldo C. Melo : Convert to seq_file
+ *
+ * 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/types.h>
+#include <net/net_namespace.h>
+#include <net/icmp.h>
+#include <net/protocol.h>
+#include <net/tcp.h>
+#include <net/udp.h>
+#include <net/udplite.h>
+#include <linux/bottom_half.h>
+#include <linux/inetdevice.h>
+#include <linux/proc_fs.h>
+#include <linux/seq_file.h>
+#include <net/sock.h>
+#include <net/raw.h>
+
+/*
+ * Report socket allocation statistics [mea@utu.fi]
+ */
+static int sockstat_seq_show(struct seq_file *seq, void *v)
+{
+ struct net *net = seq->private;
+ int orphans, sockets;
+
+ local_bh_disable();
+ orphans = percpu_counter_sum_positive(&tcp_orphan_count);
+ sockets = percpu_counter_sum_positive(&tcp_sockets_allocated);
+ local_bh_enable();
+
+ socket_seq_show(seq);
+ seq_printf(seq, "TCP: inuse %d orphan %d tw %d alloc %d mem %ld\n",
+ sock_prot_inuse_get(net, &tcp_prot), orphans,
+ tcp_death_row.tw_count, sockets,
+ atomic_long_read(&tcp_memory_allocated));
+ seq_printf(seq, "UDP: inuse %d mem %ld\n",
+ sock_prot_inuse_get(net, &udp_prot),
+ atomic_long_read(&udp_memory_allocated));
+ seq_printf(seq, "UDPLITE: inuse %d\n",
+ sock_prot_inuse_get(net, &udplite_prot));
+ seq_printf(seq, "RAW: inuse %d\n",
+ sock_prot_inuse_get(net, &raw_prot));
+ seq_printf(seq, "FRAG: inuse %d memory %d\n",
+ ip_frag_nqueues(net), ip_frag_mem(net));
+ return 0;
+}
+
+static int sockstat_seq_open(struct inode *inode, struct file *file)
+{
+ return single_open_net(inode, file, sockstat_seq_show);
+}
+
+static const struct file_operations sockstat_seq_fops = {
+ .owner = THIS_MODULE,
+ .open = sockstat_seq_open,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = single_release_net,
+};
+
+/* snmp items */
+static const struct snmp_mib snmp4_ipstats_list[] = {
+ SNMP_MIB_ITEM("InReceives", IPSTATS_MIB_INPKTS),
+ SNMP_MIB_ITEM("InHdrErrors", IPSTATS_MIB_INHDRERRORS),
+ SNMP_MIB_ITEM("InAddrErrors", IPSTATS_MIB_INADDRERRORS),
+ SNMP_MIB_ITEM("ForwDatagrams", IPSTATS_MIB_OUTFORWDATAGRAMS),
+ SNMP_MIB_ITEM("InUnknownProtos", IPSTATS_MIB_INUNKNOWNPROTOS),
+ SNMP_MIB_ITEM("InDiscards", IPSTATS_MIB_INDISCARDS),
+ SNMP_MIB_ITEM("InDelivers", IPSTATS_MIB_INDELIVERS),
+ SNMP_MIB_ITEM("OutRequests", IPSTATS_MIB_OUTPKTS),
+ SNMP_MIB_ITEM("OutDiscards", IPSTATS_MIB_OUTDISCARDS),
+ SNMP_MIB_ITEM("OutNoRoutes", IPSTATS_MIB_OUTNOROUTES),
+ SNMP_MIB_ITEM("ReasmTimeout", IPSTATS_MIB_REASMTIMEOUT),
+ SNMP_MIB_ITEM("ReasmReqds", IPSTATS_MIB_REASMREQDS),
+ SNMP_MIB_ITEM("ReasmOKs", IPSTATS_MIB_REASMOKS),
+ SNMP_MIB_ITEM("ReasmFails", IPSTATS_MIB_REASMFAILS),
+ SNMP_MIB_ITEM("FragOKs", IPSTATS_MIB_FRAGOKS),
+ SNMP_MIB_ITEM("FragFails", IPSTATS_MIB_FRAGFAILS),
+ SNMP_MIB_ITEM("FragCreates", IPSTATS_MIB_FRAGCREATES),
+ SNMP_MIB_SENTINEL
+};
+
+/* Following RFC4293 items are displayed in /proc/net/netstat */
+static const struct snmp_mib snmp4_ipextstats_list[] = {
+ SNMP_MIB_ITEM("InNoRoutes", IPSTATS_MIB_INNOROUTES),
+ SNMP_MIB_ITEM("InTruncatedPkts", IPSTATS_MIB_INTRUNCATEDPKTS),
+ SNMP_MIB_ITEM("InMcastPkts", IPSTATS_MIB_INMCASTPKTS),
+ SNMP_MIB_ITEM("OutMcastPkts", IPSTATS_MIB_OUTMCASTPKTS),
+ SNMP_MIB_ITEM("InBcastPkts", IPSTATS_MIB_INBCASTPKTS),
+ SNMP_MIB_ITEM("OutBcastPkts", IPSTATS_MIB_OUTBCASTPKTS),
+ SNMP_MIB_ITEM("InOctets", IPSTATS_MIB_INOCTETS),
+ SNMP_MIB_ITEM("OutOctets", IPSTATS_MIB_OUTOCTETS),
+ SNMP_MIB_ITEM("InMcastOctets", IPSTATS_MIB_INMCASTOCTETS),
+ SNMP_MIB_ITEM("OutMcastOctets", IPSTATS_MIB_OUTMCASTOCTETS),
+ SNMP_MIB_ITEM("InBcastOctets", IPSTATS_MIB_INBCASTOCTETS),
+ SNMP_MIB_ITEM("OutBcastOctets", IPSTATS_MIB_OUTBCASTOCTETS),
+ SNMP_MIB_SENTINEL
+};
+
+static const struct {
+ const char *name;
+ int index;
+} icmpmibmap[] = {
+ { "DestUnreachs", ICMP_DEST_UNREACH },
+ { "TimeExcds", ICMP_TIME_EXCEEDED },
+ { "ParmProbs", ICMP_PARAMETERPROB },
+ { "SrcQuenchs", ICMP_SOURCE_QUENCH },
+ { "Redirects", ICMP_REDIRECT },
+ { "Echos", ICMP_ECHO },
+ { "EchoReps", ICMP_ECHOREPLY },
+ { "Timestamps", ICMP_TIMESTAMP },
+ { "TimestampReps", ICMP_TIMESTAMPREPLY },
+ { "AddrMasks", ICMP_ADDRESS },
+ { "AddrMaskReps", ICMP_ADDRESSREPLY },
+ { NULL, 0 }
+};
+
+
+static const struct snmp_mib snmp4_tcp_list[] = {
+ SNMP_MIB_ITEM("RtoAlgorithm", TCP_MIB_RTOALGORITHM),
+ SNMP_MIB_ITEM("RtoMin", TCP_MIB_RTOMIN),
+ SNMP_MIB_ITEM("RtoMax", TCP_MIB_RTOMAX),
+ SNMP_MIB_ITEM("MaxConn", TCP_MIB_MAXCONN),
+ SNMP_MIB_ITEM("ActiveOpens", TCP_MIB_ACTIVEOPENS),
+ SNMP_MIB_ITEM("PassiveOpens", TCP_MIB_PASSIVEOPENS),
+ SNMP_MIB_ITEM("AttemptFails", TCP_MIB_ATTEMPTFAILS),
+ SNMP_MIB_ITEM("EstabResets", TCP_MIB_ESTABRESETS),
+ SNMP_MIB_ITEM("CurrEstab", TCP_MIB_CURRESTAB),
+ SNMP_MIB_ITEM("InSegs", TCP_MIB_INSEGS),
+ SNMP_MIB_ITEM("OutSegs", TCP_MIB_OUTSEGS),
+ SNMP_MIB_ITEM("RetransSegs", TCP_MIB_RETRANSSEGS),
+ SNMP_MIB_ITEM("InErrs", TCP_MIB_INERRS),
+ SNMP_MIB_ITEM("OutRsts", TCP_MIB_OUTRSTS),
+ SNMP_MIB_SENTINEL
+};
+
+static const struct snmp_mib snmp4_udp_list[] = {
+ SNMP_MIB_ITEM("InDatagrams", UDP_MIB_INDATAGRAMS),
+ SNMP_MIB_ITEM("NoPorts", UDP_MIB_NOPORTS),
+ SNMP_MIB_ITEM("InErrors", UDP_MIB_INERRORS),
+ SNMP_MIB_ITEM("OutDatagrams", UDP_MIB_OUTDATAGRAMS),
+ SNMP_MIB_ITEM("RcvbufErrors", UDP_MIB_RCVBUFERRORS),
+ SNMP_MIB_ITEM("SndbufErrors", UDP_MIB_SNDBUFERRORS),
+ SNMP_MIB_SENTINEL
+};
+
+static const struct snmp_mib snmp4_net_list[] = {
+ SNMP_MIB_ITEM("SyncookiesSent", LINUX_MIB_SYNCOOKIESSENT),
+ SNMP_MIB_ITEM("SyncookiesRecv", LINUX_MIB_SYNCOOKIESRECV),
+ SNMP_MIB_ITEM("SyncookiesFailed", LINUX_MIB_SYNCOOKIESFAILED),
+ SNMP_MIB_ITEM("EmbryonicRsts", LINUX_MIB_EMBRYONICRSTS),
+ SNMP_MIB_ITEM("PruneCalled", LINUX_MIB_PRUNECALLED),
+ SNMP_MIB_ITEM("RcvPruned", LINUX_MIB_RCVPRUNED),
+ SNMP_MIB_ITEM("OfoPruned", LINUX_MIB_OFOPRUNED),
+ SNMP_MIB_ITEM("OutOfWindowIcmps", LINUX_MIB_OUTOFWINDOWICMPS),
+ SNMP_MIB_ITEM("LockDroppedIcmps", LINUX_MIB_LOCKDROPPEDICMPS),
+ SNMP_MIB_ITEM("ArpFilter", LINUX_MIB_ARPFILTER),
+ SNMP_MIB_ITEM("TW", LINUX_MIB_TIMEWAITED),
+ SNMP_MIB_ITEM("TWRecycled", LINUX_MIB_TIMEWAITRECYCLED),
+ SNMP_MIB_ITEM("TWKilled", LINUX_MIB_TIMEWAITKILLED),
+ SNMP_MIB_ITEM("PAWSPassive", LINUX_MIB_PAWSPASSIVEREJECTED),
+ SNMP_MIB_ITEM("PAWSActive", LINUX_MIB_PAWSACTIVEREJECTED),
+ SNMP_MIB_ITEM("PAWSEstab", LINUX_MIB_PAWSESTABREJECTED),
+ SNMP_MIB_ITEM("DelayedACKs", LINUX_MIB_DELAYEDACKS),
+ SNMP_MIB_ITEM("DelayedACKLocked", LINUX_MIB_DELAYEDACKLOCKED),
+ SNMP_MIB_ITEM("DelayedACKLost", LINUX_MIB_DELAYEDACKLOST),
+ SNMP_MIB_ITEM("ListenOverflows", LINUX_MIB_LISTENOVERFLOWS),
+ SNMP_MIB_ITEM("ListenDrops", LINUX_MIB_LISTENDROPS),
+ SNMP_MIB_ITEM("TCPPrequeued", LINUX_MIB_TCPPREQUEUED),
+ SNMP_MIB_ITEM("TCPDirectCopyFromBacklog", LINUX_MIB_TCPDIRECTCOPYFROMBACKLOG),
+ SNMP_MIB_ITEM("TCPDirectCopyFromPrequeue", LINUX_MIB_TCPDIRECTCOPYFROMPREQUEUE),
+ SNMP_MIB_ITEM("TCPPrequeueDropped", LINUX_MIB_TCPPREQUEUEDROPPED),
+ SNMP_MIB_ITEM("TCPHPHits", LINUX_MIB_TCPHPHITS),
+ SNMP_MIB_ITEM("TCPHPHitsToUser", LINUX_MIB_TCPHPHITSTOUSER),
+ SNMP_MIB_ITEM("TCPPureAcks", LINUX_MIB_TCPPUREACKS),
+ SNMP_MIB_ITEM("TCPHPAcks", LINUX_MIB_TCPHPACKS),
+ SNMP_MIB_ITEM("TCPRenoRecovery", LINUX_MIB_TCPRENORECOVERY),
+ SNMP_MIB_ITEM("TCPSackRecovery", LINUX_MIB_TCPSACKRECOVERY),
+ SNMP_MIB_ITEM("TCPSACKReneging", LINUX_MIB_TCPSACKRENEGING),
+ SNMP_MIB_ITEM("TCPFACKReorder", LINUX_MIB_TCPFACKREORDER),
+ SNMP_MIB_ITEM("TCPSACKReorder", LINUX_MIB_TCPSACKREORDER),
+ SNMP_MIB_ITEM("TCPRenoReorder", LINUX_MIB_TCPRENOREORDER),
+ SNMP_MIB_ITEM("TCPTSReorder", LINUX_MIB_TCPTSREORDER),
+ SNMP_MIB_ITEM("TCPFullUndo", LINUX_MIB_TCPFULLUNDO),
+ SNMP_MIB_ITEM("TCPPartialUndo", LINUX_MIB_TCPPARTIALUNDO),
+ SNMP_MIB_ITEM("TCPDSACKUndo", LINUX_MIB_TCPDSACKUNDO),
+ SNMP_MIB_ITEM("TCPLossUndo", LINUX_MIB_TCPLOSSUNDO),
+ SNMP_MIB_ITEM("TCPLoss", LINUX_MIB_TCPLOSS),
+ SNMP_MIB_ITEM("TCPLostRetransmit", LINUX_MIB_TCPLOSTRETRANSMIT),
+ SNMP_MIB_ITEM("TCPRenoFailures", LINUX_MIB_TCPRENOFAILURES),
+ SNMP_MIB_ITEM("TCPSackFailures", LINUX_MIB_TCPSACKFAILURES),
+ SNMP_MIB_ITEM("TCPLossFailures", LINUX_MIB_TCPLOSSFAILURES),
+ SNMP_MIB_ITEM("TCPFastRetrans", LINUX_MIB_TCPFASTRETRANS),
+ SNMP_MIB_ITEM("TCPForwardRetrans", LINUX_MIB_TCPFORWARDRETRANS),
+ SNMP_MIB_ITEM("TCPSlowStartRetrans", LINUX_MIB_TCPSLOWSTARTRETRANS),
+ SNMP_MIB_ITEM("TCPTimeouts", LINUX_MIB_TCPTIMEOUTS),
+ SNMP_MIB_ITEM("TCPRenoRecoveryFail", LINUX_MIB_TCPRENORECOVERYFAIL),
+ SNMP_MIB_ITEM("TCPSackRecoveryFail", LINUX_MIB_TCPSACKRECOVERYFAIL),
+ SNMP_MIB_ITEM("TCPSchedulerFailed", LINUX_MIB_TCPSCHEDULERFAILED),
+ SNMP_MIB_ITEM("TCPRcvCollapsed", LINUX_MIB_TCPRCVCOLLAPSED),
+ SNMP_MIB_ITEM("TCPDSACKOldSent", LINUX_MIB_TCPDSACKOLDSENT),
+ SNMP_MIB_ITEM("TCPDSACKOfoSent", LINUX_MIB_TCPDSACKOFOSENT),
+ SNMP_MIB_ITEM("TCPDSACKRecv", LINUX_MIB_TCPDSACKRECV),
+ SNMP_MIB_ITEM("TCPDSACKOfoRecv", LINUX_MIB_TCPDSACKOFORECV),
+ SNMP_MIB_ITEM("TCPAbortOnSyn", LINUX_MIB_TCPABORTONSYN),
+ SNMP_MIB_ITEM("TCPAbortOnData", LINUX_MIB_TCPABORTONDATA),
+ SNMP_MIB_ITEM("TCPAbortOnClose", LINUX_MIB_TCPABORTONCLOSE),
+ SNMP_MIB_ITEM("TCPAbortOnMemory", LINUX_MIB_TCPABORTONMEMORY),
+ SNMP_MIB_ITEM("TCPAbortOnTimeout", LINUX_MIB_TCPABORTONTIMEOUT),
+ SNMP_MIB_ITEM("TCPAbortOnLinger", LINUX_MIB_TCPABORTONLINGER),
+ SNMP_MIB_ITEM("TCPAbortFailed", LINUX_MIB_TCPABORTFAILED),
+ SNMP_MIB_ITEM("TCPMemoryPressures", LINUX_MIB_TCPMEMORYPRESSURES),
+ SNMP_MIB_ITEM("TCPSACKDiscard", LINUX_MIB_TCPSACKDISCARD),
+ SNMP_MIB_ITEM("TCPDSACKIgnoredOld", LINUX_MIB_TCPDSACKIGNOREDOLD),
+ SNMP_MIB_ITEM("TCPDSACKIgnoredNoUndo", LINUX_MIB_TCPDSACKIGNOREDNOUNDO),
+ SNMP_MIB_ITEM("TCPSpuriousRTOs", LINUX_MIB_TCPSPURIOUSRTOS),
+ SNMP_MIB_ITEM("TCPMD5NotFound", LINUX_MIB_TCPMD5NOTFOUND),
+ SNMP_MIB_ITEM("TCPMD5Unexpected", LINUX_MIB_TCPMD5UNEXPECTED),
+ SNMP_MIB_ITEM("TCPSackShifted", LINUX_MIB_SACKSHIFTED),
+ SNMP_MIB_ITEM("TCPSackMerged", LINUX_MIB_SACKMERGED),
+ SNMP_MIB_ITEM("TCPSackShiftFallback", LINUX_MIB_SACKSHIFTFALLBACK),
+ SNMP_MIB_ITEM("TCPBacklogDrop", LINUX_MIB_TCPBACKLOGDROP),
+ SNMP_MIB_ITEM("TCPMinTTLDrop", LINUX_MIB_TCPMINTTLDROP),
+ SNMP_MIB_ITEM("TCPDeferAcceptDrop", LINUX_MIB_TCPDEFERACCEPTDROP),
+ SNMP_MIB_ITEM("IPReversePathFilter", LINUX_MIB_IPRPFILTER),
+ SNMP_MIB_ITEM("TCPTimeWaitOverflow", LINUX_MIB_TCPTIMEWAITOVERFLOW),
+ SNMP_MIB_SENTINEL
+};
+
+static void icmpmsg_put_line(struct seq_file *seq, unsigned long *vals,
+ unsigned short *type, int count)
+{
+ int j;
+
+ if (count) {
+ seq_printf(seq, "\nIcmpMsg:");
+ for (j = 0; j < count; ++j)
+ seq_printf(seq, " %sType%u",
+ type[j] & 0x100 ? "Out" : "In",
+ type[j] & 0xff);
+ seq_printf(seq, "\nIcmpMsg:");
+ for (j = 0; j < count; ++j)
+ seq_printf(seq, " %lu", vals[j]);
+ }
+}
+
+static void icmpmsg_put(struct seq_file *seq)
+{
+#define PERLINE 16
+
+ int i, count;
+ unsigned short type[PERLINE];
+ unsigned long vals[PERLINE], val;
+ struct net *net = seq->private;
+
+ count = 0;
+ for (i = 0; i < ICMPMSG_MIB_MAX; i++) {
+ val = snmp_fold_field((void __percpu **) net->mib.icmpmsg_statistics, i);
+ if (val) {
+ type[count] = i;
+ vals[count++] = val;
+ }
+ if (count == PERLINE) {
+ icmpmsg_put_line(seq, vals, type, count);
+ count = 0;
+ }
+ }
+ icmpmsg_put_line(seq, vals, type, count);
+
+#undef PERLINE
+}
+
+static void icmp_put(struct seq_file *seq)
+{
+ int i;
+ struct net *net = seq->private;
+
+ seq_puts(seq, "\nIcmp: InMsgs InErrors");
+ for (i=0; icmpmibmap[i].name != NULL; i++)
+ seq_printf(seq, " In%s", icmpmibmap[i].name);
+ seq_printf(seq, " OutMsgs OutErrors");
+ for (i=0; icmpmibmap[i].name != NULL; i++)
+ seq_printf(seq, " Out%s", icmpmibmap[i].name);
+ seq_printf(seq, "\nIcmp: %lu %lu",
+ snmp_fold_field((void __percpu **) net->mib.icmp_statistics, ICMP_MIB_INMSGS),
+ snmp_fold_field((void __percpu **) net->mib.icmp_statistics, ICMP_MIB_INERRORS));
+ for (i=0; icmpmibmap[i].name != NULL; i++)
+ seq_printf(seq, " %lu",
+ snmp_fold_field((void __percpu **) net->mib.icmpmsg_statistics,
+ icmpmibmap[i].index));
+ seq_printf(seq, " %lu %lu",
+ snmp_fold_field((void __percpu **) net->mib.icmp_statistics, ICMP_MIB_OUTMSGS),
+ snmp_fold_field((void __percpu **) net->mib.icmp_statistics, ICMP_MIB_OUTERRORS));
+ for (i=0; icmpmibmap[i].name != NULL; i++)
+ seq_printf(seq, " %lu",
+ snmp_fold_field((void __percpu **) net->mib.icmpmsg_statistics,
+ icmpmibmap[i].index | 0x100));
+}
+
+/*
+ * Called from the PROCfs module. This outputs /proc/net/snmp.
+ */
+static int snmp_seq_show(struct seq_file *seq, void *v)
+{
+ int i;
+ struct net *net = seq->private;
+
+ seq_puts(seq, "Ip: Forwarding DefaultTTL");
+
+ for (i = 0; snmp4_ipstats_list[i].name != NULL; i++)
+ seq_printf(seq, " %s", snmp4_ipstats_list[i].name);
+
+ seq_printf(seq, "\nIp: %d %d",
+ IPV4_DEVCONF_ALL(net, FORWARDING) ? 1 : 2,
+ sysctl_ip_default_ttl);
+
+ BUILD_BUG_ON(offsetof(struct ipstats_mib, mibs) != 0);
+ for (i = 0; snmp4_ipstats_list[i].name != NULL; i++)
+ seq_printf(seq, " %llu",
+ snmp_fold_field64((void __percpu **)net->mib.ip_statistics,
+ snmp4_ipstats_list[i].entry,
+ offsetof(struct ipstats_mib, syncp)));
+
+ icmp_put(seq); /* RFC 2011 compatibility */
+ icmpmsg_put(seq);
+
+ seq_puts(seq, "\nTcp:");
+ for (i = 0; snmp4_tcp_list[i].name != NULL; i++)
+ seq_printf(seq, " %s", snmp4_tcp_list[i].name);
+
+ seq_puts(seq, "\nTcp:");
+ for (i = 0; snmp4_tcp_list[i].name != NULL; i++) {
+ /* MaxConn field is signed, RFC 2012 */
+ if (snmp4_tcp_list[i].entry == TCP_MIB_MAXCONN)
+ seq_printf(seq, " %ld",
+ snmp_fold_field((void __percpu **)net->mib.tcp_statistics,
+ snmp4_tcp_list[i].entry));
+ else
+ seq_printf(seq, " %lu",
+ snmp_fold_field((void __percpu **)net->mib.tcp_statistics,
+ snmp4_tcp_list[i].entry));
+ }
+
+ seq_puts(seq, "\nUdp:");
+ for (i = 0; snmp4_udp_list[i].name != NULL; i++)
+ seq_printf(seq, " %s", snmp4_udp_list[i].name);
+
+ seq_puts(seq, "\nUdp:");
+ for (i = 0; snmp4_udp_list[i].name != NULL; i++)
+ seq_printf(seq, " %lu",
+ snmp_fold_field((void __percpu **)net->mib.udp_statistics,
+ snmp4_udp_list[i].entry));
+
+ /* the UDP and UDP-Lite MIBs are the same */
+ seq_puts(seq, "\nUdpLite:");
+ for (i = 0; snmp4_udp_list[i].name != NULL; i++)
+ seq_printf(seq, " %s", snmp4_udp_list[i].name);
+
+ seq_puts(seq, "\nUdpLite:");
+ for (i = 0; snmp4_udp_list[i].name != NULL; i++)
+ seq_printf(seq, " %lu",
+ snmp_fold_field((void __percpu **)net->mib.udplite_statistics,
+ snmp4_udp_list[i].entry));
+
+ seq_putc(seq, '\n');
+ return 0;
+}
+
+static int snmp_seq_open(struct inode *inode, struct file *file)
+{
+ return single_open_net(inode, file, snmp_seq_show);
+}
+
+static const struct file_operations snmp_seq_fops = {
+ .owner = THIS_MODULE,
+ .open = snmp_seq_open,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = single_release_net,
+};
+
+
+
+/*
+ * Output /proc/net/netstat
+ */
+static int netstat_seq_show(struct seq_file *seq, void *v)
+{
+ int i;
+ struct net *net = seq->private;
+
+ seq_puts(seq, "TcpExt:");
+ for (i = 0; snmp4_net_list[i].name != NULL; i++)
+ seq_printf(seq, " %s", snmp4_net_list[i].name);
+
+ seq_puts(seq, "\nTcpExt:");
+ for (i = 0; snmp4_net_list[i].name != NULL; i++)
+ seq_printf(seq, " %lu",
+ snmp_fold_field((void __percpu **)net->mib.net_statistics,
+ snmp4_net_list[i].entry));
+
+ seq_puts(seq, "\nIpExt:");
+ for (i = 0; snmp4_ipextstats_list[i].name != NULL; i++)
+ seq_printf(seq, " %s", snmp4_ipextstats_list[i].name);
+
+ seq_puts(seq, "\nIpExt:");
+ for (i = 0; snmp4_ipextstats_list[i].name != NULL; i++)
+ seq_printf(seq, " %llu",
+ snmp_fold_field64((void __percpu **)net->mib.ip_statistics,
+ snmp4_ipextstats_list[i].entry,
+ offsetof(struct ipstats_mib, syncp)));
+
+ seq_putc(seq, '\n');
+ return 0;
+}
+
+static int netstat_seq_open(struct inode *inode, struct file *file)
+{
+ return single_open_net(inode, file, netstat_seq_show);
+}
+
+static const struct file_operations netstat_seq_fops = {
+ .owner = THIS_MODULE,
+ .open = netstat_seq_open,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = single_release_net,
+};
+
+static __net_init int ip_proc_init_net(struct net *net)
+{
+ if (!proc_net_fops_create(net, "sockstat", S_IRUGO, &sockstat_seq_fops))
+ goto out_sockstat;
+ if (!proc_net_fops_create(net, "netstat", S_IRUGO, &netstat_seq_fops))
+ goto out_netstat;
+ if (!proc_net_fops_create(net, "snmp", S_IRUGO, &snmp_seq_fops))
+ goto out_snmp;
+
+ return 0;
+
+out_snmp:
+ proc_net_remove(net, "netstat");
+out_netstat:
+ proc_net_remove(net, "sockstat");
+out_sockstat:
+ return -ENOMEM;
+}
+
+static __net_exit void ip_proc_exit_net(struct net *net)
+{
+ proc_net_remove(net, "snmp");
+ proc_net_remove(net, "netstat");
+ proc_net_remove(net, "sockstat");
+}
+
+static __net_initdata struct pernet_operations ip_proc_ops = {
+ .init = ip_proc_init_net,
+ .exit = ip_proc_exit_net,
+};
+
+int __init ip_misc_proc_init(void)
+{
+ return register_pernet_subsys(&ip_proc_ops);
+}
+
--
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