1 files changed, 382 insertions, 0 deletions

diff --git a/net/ipv4/proc.c b/net/ipv4/proc.c
new file mode 100644
index 000000000000..912bbcc7f415
--- /dev/null
+++ b/net/ipv4/proc.c
@@ -0,0 +1,382 @@
+/*
+ * 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
+ *      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/icmp.h>
+#include <net/protocol.h>
+#include <net/tcp.h>
+#include <net/udp.h>
+#include <linux/proc_fs.h>
+#include <linux/seq_file.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 < NR_CPUS; cpu++)
+                res += proto->stats[cpu].inuse;
+
+        return res;
+}
+
+/*
+ *      Report socket allocation statistics [mea@utu.fi]
+ */
+static int sockstat_seq_show(struct seq_file *seq, void *v)
+{
+        /* From net/socket.c */
+        extern void socket_seq_show(struct seq_file *seq);
+
+        socket_seq_show(seq);
+        seq_printf(seq, "TCP: inuse %d orphan %d tw %d alloc %d mem %d\n",
+                   fold_prot_inuse(&tcp_prot), atomic_read(&tcp_orphan_count),
+                   tcp_tw_count, atomic_read(&tcp_sockets_allocated),
+                   atomic_read(&tcp_memory_allocated));
+        seq_printf(seq, "UDP: inuse %d\n", fold_prot_inuse(&udp_prot));
+        seq_printf(seq, "RAW: inuse %d\n", fold_prot_inuse(&raw_prot));
+        seq_printf(seq,  "FRAG: inuse %d memory %d\n", ip_frag_nqueues,
+                   atomic_read(&ip_frag_mem));
+        return 0;
+}
+
+static int sockstat_seq_open(struct inode *inode, struct file *file)
+{
+        return single_open(file, sockstat_seq_show, NULL);
+}
+
+static struct file_operations sockstat_seq_fops = {
+        .owner   = THIS_MODULE,
+        .open    = sockstat_seq_open,
+        .read    = seq_read,
+        .llseek  = seq_lseek,
+        .release = single_release,
+};
+
+static unsigned long
+fold_field(void *mib[], int offt)
+{
+        unsigned long res = 0;
+        int i;
+
+        for (i = 0; i < NR_CPUS; i++) {
+                if (!cpu_possible(i))
+                        continue;
+                res += *(((unsigned long *) per_cpu_ptr(mib[0], i)) + offt);
+                res += *(((unsigned long *) per_cpu_ptr(mib[1], i)) + offt);
+        }
+        return res;
+}
+
+/* snmp items */
+static struct snmp_mib snmp4_ipstats_list[] = {
+        SNMP_MIB_ITEM("InReceives", IPSTATS_MIB_INRECEIVES),
+        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_OUTREQUESTS),
+        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
+};
+
+static struct snmp_mib snmp4_icmp_list[] = {
+        SNMP_MIB_ITEM("InMsgs", ICMP_MIB_INMSGS),
+        SNMP_MIB_ITEM("InErrors", ICMP_MIB_INERRORS),
+        SNMP_MIB_ITEM("InDestUnreachs", ICMP_MIB_INDESTUNREACHS),
+        SNMP_MIB_ITEM("InTimeExcds", ICMP_MIB_INTIMEEXCDS),
+        SNMP_MIB_ITEM("InParmProbs", ICMP_MIB_INPARMPROBS),
+        SNMP_MIB_ITEM("InSrcQuenchs", ICMP_MIB_INSRCQUENCHS),
+        SNMP_MIB_ITEM("InRedirects", ICMP_MIB_INREDIRECTS),
+        SNMP_MIB_ITEM("InEchos", ICMP_MIB_INECHOS),
+        SNMP_MIB_ITEM("InEchoReps", ICMP_MIB_INECHOREPS),
+        SNMP_MIB_ITEM("InTimestamps", ICMP_MIB_INTIMESTAMPS),
+        SNMP_MIB_ITEM("InTimestampReps", ICMP_MIB_INTIMESTAMPREPS),
+        SNMP_MIB_ITEM("InAddrMasks", ICMP_MIB_INADDRMASKS),
+        SNMP_MIB_ITEM("InAddrMaskReps", ICMP_MIB_INADDRMASKREPS),
+        SNMP_MIB_ITEM("OutMsgs", ICMP_MIB_OUTMSGS),
+        SNMP_MIB_ITEM("OutErrors", ICMP_MIB_OUTERRORS),
+        SNMP_MIB_ITEM("OutDestUnreachs", ICMP_MIB_OUTDESTUNREACHS),
+        SNMP_MIB_ITEM("OutTimeExcds", ICMP_MIB_OUTTIMEEXCDS),
+        SNMP_MIB_ITEM("OutParmProbs", ICMP_MIB_OUTPARMPROBS),
+        SNMP_MIB_ITEM("OutSrcQuenchs", ICMP_MIB_OUTSRCQUENCHS),
+        SNMP_MIB_ITEM("OutRedirects", ICMP_MIB_OUTREDIRECTS),
+        SNMP_MIB_ITEM("OutEchos", ICMP_MIB_OUTECHOS),
+        SNMP_MIB_ITEM("OutEchoReps", ICMP_MIB_OUTECHOREPS),
+        SNMP_MIB_ITEM("OutTimestamps", ICMP_MIB_OUTTIMESTAMPS),
+        SNMP_MIB_ITEM("OutTimestampReps", ICMP_MIB_OUTTIMESTAMPREPS),
+        SNMP_MIB_ITEM("OutAddrMasks", ICMP_MIB_OUTADDRMASKS),
+        SNMP_MIB_ITEM("OutAddrMaskReps", ICMP_MIB_OUTADDRMASKREPS),
+        SNMP_MIB_SENTINEL
+};
+
+static 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 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_SENTINEL
+};
+
+static 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_SENTINEL
+};
+
+/*
+ *      Called from the PROCfs module. This outputs /proc/net/snmp.
+ */
+static int snmp_seq_show(struct seq_file *seq, void *v)
+{
+        int i;
+
+        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.forwarding ? 1 : 2, sysctl_ip_default_ttl);
+
+        for (i = 0; snmp4_ipstats_list[i].name != NULL; i++)
+                seq_printf(seq, " %lu",
+                           fold_field((void **) ip_statistics, 
+                                      snmp4_ipstats_list[i].entry));
+
+        seq_puts(seq, "\nIcmp:");
+        for (i = 0; snmp4_icmp_list[i].name != NULL; i++)
+                seq_printf(seq, " %s", snmp4_icmp_list[i].name);
+
+        seq_puts(seq, "\nIcmp:");
+        for (i = 0; snmp4_icmp_list[i].name != NULL; i++)
+                seq_printf(seq, " %lu",
+                           fold_field((void **) icmp_statistics, 
+                                      snmp4_icmp_list[i].entry));
+
+        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",
+                                   fold_field((void **) tcp_statistics, 
+                                              snmp4_tcp_list[i].entry));
+                else
+                        seq_printf(seq, " %lu",
+                                   fold_field((void **) 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",
+                           fold_field((void **) udp_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(file, snmp_seq_show, NULL);
+}
+
+static struct file_operations snmp_seq_fops = {
+        .owner   = THIS_MODULE,
+        .open    = snmp_seq_open,
+        .read    = seq_read,
+        .llseek  = seq_lseek,
+        .release = single_release,
+};
+
+/*
+ *      Output /proc/net/netstat
+ */
+static int netstat_seq_show(struct seq_file *seq, void *v)
+{
+        int i;
+
+        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",
+                           fold_field((void **) net_statistics, 
+                                      snmp4_net_list[i].entry));
+
+        seq_putc(seq, '\n');
+        return 0;
+}
+
+static int netstat_seq_open(struct inode *inode, struct file *file)
+{
+        return single_open(file, netstat_seq_show, NULL);
+}
+
+static struct file_operations netstat_seq_fops = {
+        .owner   = THIS_MODULE,
+        .open    = netstat_seq_open,
+        .read    = seq_read,
+        .llseek  = seq_lseek,
+        .release = single_release,
+};
+
+int __init ip_misc_proc_init(void)
+{
+        int rc = 0;
+
+        if (!proc_net_fops_create("netstat", S_IRUGO, &netstat_seq_fops))
+                goto out_netstat;
+
+        if (!proc_net_fops_create("snmp", S_IRUGO, &snmp_seq_fops))
+                goto out_snmp;
+
+        if (!proc_net_fops_create("sockstat", S_IRUGO, &sockstat_seq_fops))
+                goto out_sockstat;
+out:
+        return rc;
+out_sockstat:
+        proc_net_remove("snmp");
+out_snmp:
+        proc_net_remove("netstat");
+out_netstat:
+        rc = -ENOMEM;
+        goto out;
+}
+