1// SPDX-License-Identifier: GPL-2.0-or-later
  2/*
  3 * INET		An implementation of the TCP/IP protocol suite for the LINUX
  4 *		operating system.  INET is implemented using the  BSD Socket
  5 *		interface as the means of communication with the user level.
  6 *
  7 *		This file implements the various access functions for the
  8 *		PROC file system.  It is mainly used for debugging and
  9 *		statistics.
 10 *
 11 * Authors:	Fred N. van Kempen, <waltje@uWalt.NL.Mugnet.ORG>
 12 *		Gerald J. Heim, <heim@peanuts.informatik.uni-tuebingen.de>
 13 *		Fred Baumgarten, <dc6iq@insu1.etec.uni-karlsruhe.de>
 14 *		Erik Schoenfelder, <schoenfr@ibr.cs.tu-bs.de>
 15 *
 16 * Fixes:
 17 *		Alan Cox	:	UDP sockets show the rxqueue/txqueue
 18 *					using hint flag for the netinfo.
 19 *	Pauline Middelink	:	identd support
 20 *		Alan Cox	:	Make /proc safer.
 21 *	Erik Schoenfelder	:	/proc/net/snmp
 22 *		Alan Cox	:	Handle dead sockets properly.
 23 *	Gerhard Koerting	:	Show both timers
 24 *		Alan Cox	:	Allow inode to be NULL (kernel socket)
 25 *	Andi Kleen		:	Add support for open_requests and
 26 *					split functions for more readibility.
 27 *	Andi Kleen		:	Add support for /proc/net/netstat
 28 *	Arnaldo C. Melo		:	Convert to seq_file
 29 */
 30#include <linux/types.h>
 31#include <net/net_namespace.h>
 32#include <net/icmp.h>
 33#include <net/protocol.h>
 34#include <net/tcp.h>
 35#include <net/mptcp.h>
 36#include <net/udp.h>
 37#include <net/udplite.h>
 38#include <linux/bottom_half.h>
 39#include <linux/inetdevice.h>
 40#include <linux/proc_fs.h>
 41#include <linux/seq_file.h>
 42#include <linux/export.h>
 43#include <net/sock.h>
 44#include <net/raw.h>
 45
 46#define TCPUDP_MIB_MAX max_t(u32, UDP_MIB_MAX, TCP_MIB_MAX)
 47
 48/*
 49 *	Report socket allocation statistics [mea@utu.fi]
 50 */
 51static int sockstat_seq_show(struct seq_file *seq, void *v)
 52{
 53	struct net *net = seq->private;
 54	int orphans, sockets;
 55
 56	orphans = percpu_counter_sum_positive(&tcp_orphan_count);
 57	sockets = proto_sockets_allocated_sum_positive(&tcp_prot);
 58
 59	socket_seq_show(seq);
 60	seq_printf(seq, "TCP: inuse %d orphan %d tw %d alloc %d mem %ld\n",
 61		   sock_prot_inuse_get(net, &tcp_prot), orphans,
 62		   atomic_read(&net->ipv4.tcp_death_row.tw_count), sockets,
 63		   proto_memory_allocated(&tcp_prot));
 64	seq_printf(seq, "UDP: inuse %d mem %ld\n",
 65		   sock_prot_inuse_get(net, &udp_prot),
 66		   proto_memory_allocated(&udp_prot));
 67	seq_printf(seq, "UDPLITE: inuse %d\n",
 68		   sock_prot_inuse_get(net, &udplite_prot));
 69	seq_printf(seq, "RAW: inuse %d\n",
 70		   sock_prot_inuse_get(net, &raw_prot));
 71	seq_printf(seq,  "FRAG: inuse %u memory %lu\n",
 72		   atomic_read(&net->ipv4.fqdir->rhashtable.nelems),
 73		   frag_mem_limit(net->ipv4.fqdir));
 74	return 0;
 75}
 76
 77/* snmp items */
 78static const struct snmp_mib snmp4_ipstats_list[] = {
 79	SNMP_MIB_ITEM("InReceives", IPSTATS_MIB_INPKTS),
 80	SNMP_MIB_ITEM("InHdrErrors", IPSTATS_MIB_INHDRERRORS),
 81	SNMP_MIB_ITEM("InAddrErrors", IPSTATS_MIB_INADDRERRORS),
 82	SNMP_MIB_ITEM("ForwDatagrams", IPSTATS_MIB_OUTFORWDATAGRAMS),
 83	SNMP_MIB_ITEM("InUnknownProtos", IPSTATS_MIB_INUNKNOWNPROTOS),
 84	SNMP_MIB_ITEM("InDiscards", IPSTATS_MIB_INDISCARDS),
 85	SNMP_MIB_ITEM("InDelivers", IPSTATS_MIB_INDELIVERS),
 86	SNMP_MIB_ITEM("OutRequests", IPSTATS_MIB_OUTPKTS),
 87	SNMP_MIB_ITEM("OutDiscards", IPSTATS_MIB_OUTDISCARDS),
 88	SNMP_MIB_ITEM("OutNoRoutes", IPSTATS_MIB_OUTNOROUTES),
 89	SNMP_MIB_ITEM("ReasmTimeout", IPSTATS_MIB_REASMTIMEOUT),
 90	SNMP_MIB_ITEM("ReasmReqds", IPSTATS_MIB_REASMREQDS),
 91	SNMP_MIB_ITEM("ReasmOKs", IPSTATS_MIB_REASMOKS),
 92	SNMP_MIB_ITEM("ReasmFails", IPSTATS_MIB_REASMFAILS),
 93	SNMP_MIB_ITEM("FragOKs", IPSTATS_MIB_FRAGOKS),
 94	SNMP_MIB_ITEM("FragFails", IPSTATS_MIB_FRAGFAILS),
 95	SNMP_MIB_ITEM("FragCreates", IPSTATS_MIB_FRAGCREATES),
 96	SNMP_MIB_SENTINEL
 97};
 98
 99/* Following items are displayed in /proc/net/netstat */
100static const struct snmp_mib snmp4_ipextstats_list[] = {
101	SNMP_MIB_ITEM("InNoRoutes", IPSTATS_MIB_INNOROUTES),
102	SNMP_MIB_ITEM("InTruncatedPkts", IPSTATS_MIB_INTRUNCATEDPKTS),
103	SNMP_MIB_ITEM("InMcastPkts", IPSTATS_MIB_INMCASTPKTS),
104	SNMP_MIB_ITEM("OutMcastPkts", IPSTATS_MIB_OUTMCASTPKTS),
105	SNMP_MIB_ITEM("InBcastPkts", IPSTATS_MIB_INBCASTPKTS),
106	SNMP_MIB_ITEM("OutBcastPkts", IPSTATS_MIB_OUTBCASTPKTS),
107	SNMP_MIB_ITEM("InOctets", IPSTATS_MIB_INOCTETS),
108	SNMP_MIB_ITEM("OutOctets", IPSTATS_MIB_OUTOCTETS),
109	SNMP_MIB_ITEM("InMcastOctets", IPSTATS_MIB_INMCASTOCTETS),
110	SNMP_MIB_ITEM("OutMcastOctets", IPSTATS_MIB_OUTMCASTOCTETS),
111	SNMP_MIB_ITEM("InBcastOctets", IPSTATS_MIB_INBCASTOCTETS),
112	SNMP_MIB_ITEM("OutBcastOctets", IPSTATS_MIB_OUTBCASTOCTETS),
113	/* Non RFC4293 fields */
114	SNMP_MIB_ITEM("InCsumErrors", IPSTATS_MIB_CSUMERRORS),
115	SNMP_MIB_ITEM("InNoECTPkts", IPSTATS_MIB_NOECTPKTS),
116	SNMP_MIB_ITEM("InECT1Pkts", IPSTATS_MIB_ECT1PKTS),
117	SNMP_MIB_ITEM("InECT0Pkts", IPSTATS_MIB_ECT0PKTS),
118	SNMP_MIB_ITEM("InCEPkts", IPSTATS_MIB_CEPKTS),
119	SNMP_MIB_ITEM("ReasmOverlaps", IPSTATS_MIB_REASM_OVERLAPS),
120	SNMP_MIB_SENTINEL
121};
122
123static const struct {
124	const char *name;
125	int index;
126} icmpmibmap[] = {
127	{ "DestUnreachs", ICMP_DEST_UNREACH },
128	{ "TimeExcds", ICMP_TIME_EXCEEDED },
129	{ "ParmProbs", ICMP_PARAMETERPROB },
130	{ "SrcQuenchs", ICMP_SOURCE_QUENCH },
131	{ "Redirects", ICMP_REDIRECT },
132	{ "Echos", ICMP_ECHO },
133	{ "EchoReps", ICMP_ECHOREPLY },
134	{ "Timestamps", ICMP_TIMESTAMP },
135	{ "TimestampReps", ICMP_TIMESTAMPREPLY },
136	{ "AddrMasks", ICMP_ADDRESS },
137	{ "AddrMaskReps", ICMP_ADDRESSREPLY },
138	{ NULL, 0 }
139};
140
141
142static const struct snmp_mib snmp4_tcp_list[] = {
143	SNMP_MIB_ITEM("RtoAlgorithm", TCP_MIB_RTOALGORITHM),
144	SNMP_MIB_ITEM("RtoMin", TCP_MIB_RTOMIN),
145	SNMP_MIB_ITEM("RtoMax", TCP_MIB_RTOMAX),
146	SNMP_MIB_ITEM("MaxConn", TCP_MIB_MAXCONN),
147	SNMP_MIB_ITEM("ActiveOpens", TCP_MIB_ACTIVEOPENS),
148	SNMP_MIB_ITEM("PassiveOpens", TCP_MIB_PASSIVEOPENS),
149	SNMP_MIB_ITEM("AttemptFails", TCP_MIB_ATTEMPTFAILS),
150	SNMP_MIB_ITEM("EstabResets", TCP_MIB_ESTABRESETS),
151	SNMP_MIB_ITEM("CurrEstab", TCP_MIB_CURRESTAB),
152	SNMP_MIB_ITEM("InSegs", TCP_MIB_INSEGS),
153	SNMP_MIB_ITEM("OutSegs", TCP_MIB_OUTSEGS),
154	SNMP_MIB_ITEM("RetransSegs", TCP_MIB_RETRANSSEGS),
155	SNMP_MIB_ITEM("InErrs", TCP_MIB_INERRS),
156	SNMP_MIB_ITEM("OutRsts", TCP_MIB_OUTRSTS),
157	SNMP_MIB_ITEM("InCsumErrors", TCP_MIB_CSUMERRORS),
158	SNMP_MIB_SENTINEL
159};
160
161static const struct snmp_mib snmp4_udp_list[] = {
162	SNMP_MIB_ITEM("InDatagrams", UDP_MIB_INDATAGRAMS),
163	SNMP_MIB_ITEM("NoPorts", UDP_MIB_NOPORTS),
164	SNMP_MIB_ITEM("InErrors", UDP_MIB_INERRORS),
165	SNMP_MIB_ITEM("OutDatagrams", UDP_MIB_OUTDATAGRAMS),
166	SNMP_MIB_ITEM("RcvbufErrors", UDP_MIB_RCVBUFERRORS),
167	SNMP_MIB_ITEM("SndbufErrors", UDP_MIB_SNDBUFERRORS),
168	SNMP_MIB_ITEM("InCsumErrors", UDP_MIB_CSUMERRORS),
169	SNMP_MIB_ITEM("IgnoredMulti", UDP_MIB_IGNOREDMULTI),
170	SNMP_MIB_ITEM("MemErrors", UDP_MIB_MEMERRORS),
171	SNMP_MIB_SENTINEL
172};
173
174static const struct snmp_mib snmp4_net_list[] = {
175	SNMP_MIB_ITEM("SyncookiesSent", LINUX_MIB_SYNCOOKIESSENT),
176	SNMP_MIB_ITEM("SyncookiesRecv", LINUX_MIB_SYNCOOKIESRECV),
177	SNMP_MIB_ITEM("SyncookiesFailed", LINUX_MIB_SYNCOOKIESFAILED),
178	SNMP_MIB_ITEM("EmbryonicRsts", LINUX_MIB_EMBRYONICRSTS),
179	SNMP_MIB_ITEM("PruneCalled", LINUX_MIB_PRUNECALLED),
180	SNMP_MIB_ITEM("RcvPruned", LINUX_MIB_RCVPRUNED),
181	SNMP_MIB_ITEM("OfoPruned", LINUX_MIB_OFOPRUNED),
182	SNMP_MIB_ITEM("OutOfWindowIcmps", LINUX_MIB_OUTOFWINDOWICMPS),
183	SNMP_MIB_ITEM("LockDroppedIcmps", LINUX_MIB_LOCKDROPPEDICMPS),
184	SNMP_MIB_ITEM("ArpFilter", LINUX_MIB_ARPFILTER),
185	SNMP_MIB_ITEM("TW", LINUX_MIB_TIMEWAITED),
186	SNMP_MIB_ITEM("TWRecycled", LINUX_MIB_TIMEWAITRECYCLED),
187	SNMP_MIB_ITEM("TWKilled", LINUX_MIB_TIMEWAITKILLED),
188	SNMP_MIB_ITEM("PAWSActive", LINUX_MIB_PAWSACTIVEREJECTED),
189	SNMP_MIB_ITEM("PAWSEstab", LINUX_MIB_PAWSESTABREJECTED),
190	SNMP_MIB_ITEM("DelayedACKs", LINUX_MIB_DELAYEDACKS),
191	SNMP_MIB_ITEM("DelayedACKLocked", LINUX_MIB_DELAYEDACKLOCKED),
192	SNMP_MIB_ITEM("DelayedACKLost", LINUX_MIB_DELAYEDACKLOST),
193	SNMP_MIB_ITEM("ListenOverflows", LINUX_MIB_LISTENOVERFLOWS),
194	SNMP_MIB_ITEM("ListenDrops", LINUX_MIB_LISTENDROPS),
195	SNMP_MIB_ITEM("TCPHPHits", LINUX_MIB_TCPHPHITS),
196	SNMP_MIB_ITEM("TCPPureAcks", LINUX_MIB_TCPPUREACKS),
197	SNMP_MIB_ITEM("TCPHPAcks", LINUX_MIB_TCPHPACKS),
198	SNMP_MIB_ITEM("TCPRenoRecovery", LINUX_MIB_TCPRENORECOVERY),
199	SNMP_MIB_ITEM("TCPSackRecovery", LINUX_MIB_TCPSACKRECOVERY),
200	SNMP_MIB_ITEM("TCPSACKReneging", LINUX_MIB_TCPSACKRENEGING),
201	SNMP_MIB_ITEM("TCPSACKReorder", LINUX_MIB_TCPSACKREORDER),
202	SNMP_MIB_ITEM("TCPRenoReorder", LINUX_MIB_TCPRENOREORDER),
203	SNMP_MIB_ITEM("TCPTSReorder", LINUX_MIB_TCPTSREORDER),
204	SNMP_MIB_ITEM("TCPFullUndo", LINUX_MIB_TCPFULLUNDO),
205	SNMP_MIB_ITEM("TCPPartialUndo", LINUX_MIB_TCPPARTIALUNDO),
206	SNMP_MIB_ITEM("TCPDSACKUndo", LINUX_MIB_TCPDSACKUNDO),
207	SNMP_MIB_ITEM("TCPLossUndo", LINUX_MIB_TCPLOSSUNDO),
208	SNMP_MIB_ITEM("TCPLostRetransmit", LINUX_MIB_TCPLOSTRETRANSMIT),
209	SNMP_MIB_ITEM("TCPRenoFailures", LINUX_MIB_TCPRENOFAILURES),
210	SNMP_MIB_ITEM("TCPSackFailures", LINUX_MIB_TCPSACKFAILURES),
211	SNMP_MIB_ITEM("TCPLossFailures", LINUX_MIB_TCPLOSSFAILURES),
212	SNMP_MIB_ITEM("TCPFastRetrans", LINUX_MIB_TCPFASTRETRANS),
213	SNMP_MIB_ITEM("TCPSlowStartRetrans", LINUX_MIB_TCPSLOWSTARTRETRANS),
214	SNMP_MIB_ITEM("TCPTimeouts", LINUX_MIB_TCPTIMEOUTS),
215	SNMP_MIB_ITEM("TCPLossProbes", LINUX_MIB_TCPLOSSPROBES),
216	SNMP_MIB_ITEM("TCPLossProbeRecovery", LINUX_MIB_TCPLOSSPROBERECOVERY),
217	SNMP_MIB_ITEM("TCPRenoRecoveryFail", LINUX_MIB_TCPRENORECOVERYFAIL),
218	SNMP_MIB_ITEM("TCPSackRecoveryFail", LINUX_MIB_TCPSACKRECOVERYFAIL),
219	SNMP_MIB_ITEM("TCPRcvCollapsed", LINUX_MIB_TCPRCVCOLLAPSED),
220	SNMP_MIB_ITEM("TCPBacklogCoalesce", LINUX_MIB_TCPBACKLOGCOALESCE),
221	SNMP_MIB_ITEM("TCPDSACKOldSent", LINUX_MIB_TCPDSACKOLDSENT),
222	SNMP_MIB_ITEM("TCPDSACKOfoSent", LINUX_MIB_TCPDSACKOFOSENT),
223	SNMP_MIB_ITEM("TCPDSACKRecv", LINUX_MIB_TCPDSACKRECV),
224	SNMP_MIB_ITEM("TCPDSACKOfoRecv", LINUX_MIB_TCPDSACKOFORECV),
225	SNMP_MIB_ITEM("TCPAbortOnData", LINUX_MIB_TCPABORTONDATA),
226	SNMP_MIB_ITEM("TCPAbortOnClose", LINUX_MIB_TCPABORTONCLOSE),
227	SNMP_MIB_ITEM("TCPAbortOnMemory", LINUX_MIB_TCPABORTONMEMORY),
228	SNMP_MIB_ITEM("TCPAbortOnTimeout", LINUX_MIB_TCPABORTONTIMEOUT),
229	SNMP_MIB_ITEM("TCPAbortOnLinger", LINUX_MIB_TCPABORTONLINGER),
230	SNMP_MIB_ITEM("TCPAbortFailed", LINUX_MIB_TCPABORTFAILED),
231	SNMP_MIB_ITEM("TCPMemoryPressures", LINUX_MIB_TCPMEMORYPRESSURES),
232	SNMP_MIB_ITEM("TCPMemoryPressuresChrono", LINUX_MIB_TCPMEMORYPRESSURESCHRONO),
233	SNMP_MIB_ITEM("TCPSACKDiscard", LINUX_MIB_TCPSACKDISCARD),
234	SNMP_MIB_ITEM("TCPDSACKIgnoredOld", LINUX_MIB_TCPDSACKIGNOREDOLD),
235	SNMP_MIB_ITEM("TCPDSACKIgnoredNoUndo", LINUX_MIB_TCPDSACKIGNOREDNOUNDO),
236	SNMP_MIB_ITEM("TCPSpuriousRTOs", LINUX_MIB_TCPSPURIOUSRTOS),
237	SNMP_MIB_ITEM("TCPMD5NotFound", LINUX_MIB_TCPMD5NOTFOUND),
238	SNMP_MIB_ITEM("TCPMD5Unexpected", LINUX_MIB_TCPMD5UNEXPECTED),
239	SNMP_MIB_ITEM("TCPMD5Failure", LINUX_MIB_TCPMD5FAILURE),
240	SNMP_MIB_ITEM("TCPSackShifted", LINUX_MIB_SACKSHIFTED),
241	SNMP_MIB_ITEM("TCPSackMerged", LINUX_MIB_SACKMERGED),
242	SNMP_MIB_ITEM("TCPSackShiftFallback", LINUX_MIB_SACKSHIFTFALLBACK),
243	SNMP_MIB_ITEM("TCPBacklogDrop", LINUX_MIB_TCPBACKLOGDROP),
244	SNMP_MIB_ITEM("PFMemallocDrop", LINUX_MIB_PFMEMALLOCDROP),
245	SNMP_MIB_ITEM("TCPMinTTLDrop", LINUX_MIB_TCPMINTTLDROP),
246	SNMP_MIB_ITEM("TCPDeferAcceptDrop", LINUX_MIB_TCPDEFERACCEPTDROP),
247	SNMP_MIB_ITEM("IPReversePathFilter", LINUX_MIB_IPRPFILTER),
248	SNMP_MIB_ITEM("TCPTimeWaitOverflow", LINUX_MIB_TCPTIMEWAITOVERFLOW),
249	SNMP_MIB_ITEM("TCPReqQFullDoCookies", LINUX_MIB_TCPREQQFULLDOCOOKIES),
250	SNMP_MIB_ITEM("TCPReqQFullDrop", LINUX_MIB_TCPREQQFULLDROP),
251	SNMP_MIB_ITEM("TCPRetransFail", LINUX_MIB_TCPRETRANSFAIL),
252	SNMP_MIB_ITEM("TCPRcvCoalesce", LINUX_MIB_TCPRCVCOALESCE),
253	SNMP_MIB_ITEM("TCPOFOQueue", LINUX_MIB_TCPOFOQUEUE),
254	SNMP_MIB_ITEM("TCPOFODrop", LINUX_MIB_TCPOFODROP),
255	SNMP_MIB_ITEM("TCPOFOMerge", LINUX_MIB_TCPOFOMERGE),
256	SNMP_MIB_ITEM("TCPChallengeACK", LINUX_MIB_TCPCHALLENGEACK),
257	SNMP_MIB_ITEM("TCPSYNChallenge", LINUX_MIB_TCPSYNCHALLENGE),
258	SNMP_MIB_ITEM("TCPFastOpenActive", LINUX_MIB_TCPFASTOPENACTIVE),
259	SNMP_MIB_ITEM("TCPFastOpenActiveFail", LINUX_MIB_TCPFASTOPENACTIVEFAIL),
260	SNMP_MIB_ITEM("TCPFastOpenPassive", LINUX_MIB_TCPFASTOPENPASSIVE),
261	SNMP_MIB_ITEM("TCPFastOpenPassiveFail", LINUX_MIB_TCPFASTOPENPASSIVEFAIL),
262	SNMP_MIB_ITEM("TCPFastOpenListenOverflow", LINUX_MIB_TCPFASTOPENLISTENOVERFLOW),
263	SNMP_MIB_ITEM("TCPFastOpenCookieReqd", LINUX_MIB_TCPFASTOPENCOOKIEREQD),
264	SNMP_MIB_ITEM("TCPFastOpenBlackhole", LINUX_MIB_TCPFASTOPENBLACKHOLE),
265	SNMP_MIB_ITEM("TCPSpuriousRtxHostQueues", LINUX_MIB_TCPSPURIOUS_RTX_HOSTQUEUES),
266	SNMP_MIB_ITEM("BusyPollRxPackets", LINUX_MIB_BUSYPOLLRXPACKETS),
267	SNMP_MIB_ITEM("TCPAutoCorking", LINUX_MIB_TCPAUTOCORKING),
268	SNMP_MIB_ITEM("TCPFromZeroWindowAdv", LINUX_MIB_TCPFROMZEROWINDOWADV),
269	SNMP_MIB_ITEM("TCPToZeroWindowAdv", LINUX_MIB_TCPTOZEROWINDOWADV),
270	SNMP_MIB_ITEM("TCPWantZeroWindowAdv", LINUX_MIB_TCPWANTZEROWINDOWADV),
271	SNMP_MIB_ITEM("TCPSynRetrans", LINUX_MIB_TCPSYNRETRANS),
272	SNMP_MIB_ITEM("TCPOrigDataSent", LINUX_MIB_TCPORIGDATASENT),
273	SNMP_MIB_ITEM("TCPHystartTrainDetect", LINUX_MIB_TCPHYSTARTTRAINDETECT),
274	SNMP_MIB_ITEM("TCPHystartTrainCwnd", LINUX_MIB_TCPHYSTARTTRAINCWND),
275	SNMP_MIB_ITEM("TCPHystartDelayDetect", LINUX_MIB_TCPHYSTARTDELAYDETECT),
276	SNMP_MIB_ITEM("TCPHystartDelayCwnd", LINUX_MIB_TCPHYSTARTDELAYCWND),
277	SNMP_MIB_ITEM("TCPACKSkippedSynRecv", LINUX_MIB_TCPACKSKIPPEDSYNRECV),
278	SNMP_MIB_ITEM("TCPACKSkippedPAWS", LINUX_MIB_TCPACKSKIPPEDPAWS),
279	SNMP_MIB_ITEM("TCPACKSkippedSeq", LINUX_MIB_TCPACKSKIPPEDSEQ),
280	SNMP_MIB_ITEM("TCPACKSkippedFinWait2", LINUX_MIB_TCPACKSKIPPEDFINWAIT2),
281	SNMP_MIB_ITEM("TCPACKSkippedTimeWait", LINUX_MIB_TCPACKSKIPPEDTIMEWAIT),
282	SNMP_MIB_ITEM("TCPACKSkippedChallenge", LINUX_MIB_TCPACKSKIPPEDCHALLENGE),
283	SNMP_MIB_ITEM("TCPWinProbe", LINUX_MIB_TCPWINPROBE),
284	SNMP_MIB_ITEM("TCPKeepAlive", LINUX_MIB_TCPKEEPALIVE),
285	SNMP_MIB_ITEM("TCPMTUPFail", LINUX_MIB_TCPMTUPFAIL),
286	SNMP_MIB_ITEM("TCPMTUPSuccess", LINUX_MIB_TCPMTUPSUCCESS),
287	SNMP_MIB_ITEM("TCPDelivered", LINUX_MIB_TCPDELIVERED),
288	SNMP_MIB_ITEM("TCPDeliveredCE", LINUX_MIB_TCPDELIVEREDCE),
289	SNMP_MIB_ITEM("TCPAckCompressed", LINUX_MIB_TCPACKCOMPRESSED),
290	SNMP_MIB_ITEM("TCPZeroWindowDrop", LINUX_MIB_TCPZEROWINDOWDROP),
291	SNMP_MIB_ITEM("TCPRcvQDrop", LINUX_MIB_TCPRCVQDROP),
292	SNMP_MIB_ITEM("TCPWqueueTooBig", LINUX_MIB_TCPWQUEUETOOBIG),
293	SNMP_MIB_ITEM("TCPFastOpenPassiveAltKey", LINUX_MIB_TCPFASTOPENPASSIVEALTKEY),
294	SNMP_MIB_ITEM("TcpTimeoutRehash", LINUX_MIB_TCPTIMEOUTREHASH),
295	SNMP_MIB_ITEM("TcpDuplicateDataRehash", LINUX_MIB_TCPDUPLICATEDATAREHASH),
296	SNMP_MIB_ITEM("TCPDSACKRecvSegs", LINUX_MIB_TCPDSACKRECVSEGS),
297	SNMP_MIB_ITEM("TCPDSACKIgnoredDubious", LINUX_MIB_TCPDSACKIGNOREDDUBIOUS),
298	SNMP_MIB_ITEM("TCPMigrateReqSuccess", LINUX_MIB_TCPMIGRATEREQSUCCESS),
299	SNMP_MIB_ITEM("TCPMigrateReqFailure", LINUX_MIB_TCPMIGRATEREQFAILURE),
 
300	SNMP_MIB_SENTINEL
301};
302
303static void icmpmsg_put_line(struct seq_file *seq, unsigned long *vals,
304			     unsigned short *type, int count)
305{
306	int j;
307
308	if (count) {
309		seq_puts(seq, "\nIcmpMsg:");
310		for (j = 0; j < count; ++j)
311			seq_printf(seq, " %sType%u",
312				type[j] & 0x100 ? "Out" : "In",
313				type[j] & 0xff);
314		seq_puts(seq, "\nIcmpMsg:");
315		for (j = 0; j < count; ++j)
316			seq_printf(seq, " %lu", vals[j]);
317	}
318}
319
320static void icmpmsg_put(struct seq_file *seq)
321{
322#define PERLINE	16
323
324	int i, count;
325	unsigned short type[PERLINE];
326	unsigned long vals[PERLINE], val;
327	struct net *net = seq->private;
328
329	count = 0;
330	for (i = 0; i < ICMPMSG_MIB_MAX; i++) {
331		val = atomic_long_read(&net->mib.icmpmsg_statistics->mibs[i]);
332		if (val) {
333			type[count] = i;
334			vals[count++] = val;
335		}
336		if (count == PERLINE) {
337			icmpmsg_put_line(seq, vals, type, count);
338			count = 0;
339		}
340	}
341	icmpmsg_put_line(seq, vals, type, count);
342
343#undef PERLINE
344}
345
346static void icmp_put(struct seq_file *seq)
347{
348	int i;
349	struct net *net = seq->private;
350	atomic_long_t *ptr = net->mib.icmpmsg_statistics->mibs;
351
352	seq_puts(seq, "\nIcmp: InMsgs InErrors InCsumErrors");
353	for (i = 0; icmpmibmap[i].name; i++)
354		seq_printf(seq, " In%s", icmpmibmap[i].name);
355	seq_puts(seq, " OutMsgs OutErrors");
356	for (i = 0; icmpmibmap[i].name; i++)
357		seq_printf(seq, " Out%s", icmpmibmap[i].name);
358	seq_printf(seq, "\nIcmp: %lu %lu %lu",
359		snmp_fold_field(net->mib.icmp_statistics, ICMP_MIB_INMSGS),
360		snmp_fold_field(net->mib.icmp_statistics, ICMP_MIB_INERRORS),
361		snmp_fold_field(net->mib.icmp_statistics, ICMP_MIB_CSUMERRORS));
362	for (i = 0; icmpmibmap[i].name; i++)
363		seq_printf(seq, " %lu",
364			   atomic_long_read(ptr + icmpmibmap[i].index));
365	seq_printf(seq, " %lu %lu",
366		snmp_fold_field(net->mib.icmp_statistics, ICMP_MIB_OUTMSGS),
367		snmp_fold_field(net->mib.icmp_statistics, ICMP_MIB_OUTERRORS));
368	for (i = 0; icmpmibmap[i].name; i++)
369		seq_printf(seq, " %lu",
370			   atomic_long_read(ptr + (icmpmibmap[i].index | 0x100)));
371}
372
373/*
374 *	Called from the PROCfs module. This outputs /proc/net/snmp.
375 */
376static int snmp_seq_show_ipstats(struct seq_file *seq, void *v)
377{
378	struct net *net = seq->private;
379	u64 buff64[IPSTATS_MIB_MAX];
380	int i;
381
382	memset(buff64, 0, IPSTATS_MIB_MAX * sizeof(u64));
383
384	seq_puts(seq, "Ip: Forwarding DefaultTTL");
385	for (i = 0; snmp4_ipstats_list[i].name; i++)
386		seq_printf(seq, " %s", snmp4_ipstats_list[i].name);
387
388	seq_printf(seq, "\nIp: %d %d",
389		   IPV4_DEVCONF_ALL(net, FORWARDING) ? 1 : 2,
390		   net->ipv4.sysctl_ip_default_ttl);
391
392	BUILD_BUG_ON(offsetof(struct ipstats_mib, mibs) != 0);
393	snmp_get_cpu_field64_batch(buff64, snmp4_ipstats_list,
394				   net->mib.ip_statistics,
395				   offsetof(struct ipstats_mib, syncp));
396	for (i = 0; snmp4_ipstats_list[i].name; i++)
397		seq_printf(seq, " %llu", buff64[i]);
398
399	return 0;
400}
401
402static int snmp_seq_show_tcp_udp(struct seq_file *seq, void *v)
403{
404	unsigned long buff[TCPUDP_MIB_MAX];
405	struct net *net = seq->private;
406	int i;
407
408	memset(buff, 0, TCPUDP_MIB_MAX * sizeof(unsigned long));
409
410	seq_puts(seq, "\nTcp:");
411	for (i = 0; snmp4_tcp_list[i].name; i++)
412		seq_printf(seq, " %s", snmp4_tcp_list[i].name);
413
414	seq_puts(seq, "\nTcp:");
415	snmp_get_cpu_field_batch(buff, snmp4_tcp_list,
416				 net->mib.tcp_statistics);
417	for (i = 0; snmp4_tcp_list[i].name; i++) {
418		/* MaxConn field is signed, RFC 2012 */
419		if (snmp4_tcp_list[i].entry == TCP_MIB_MAXCONN)
420			seq_printf(seq, " %ld", buff[i]);
421		else
422			seq_printf(seq, " %lu", buff[i]);
423	}
424
425	memset(buff, 0, TCPUDP_MIB_MAX * sizeof(unsigned long));
426
427	snmp_get_cpu_field_batch(buff, snmp4_udp_list,
428				 net->mib.udp_statistics);
429	seq_puts(seq, "\nUdp:");
430	for (i = 0; snmp4_udp_list[i].name; i++)
431		seq_printf(seq, " %s", snmp4_udp_list[i].name);
432	seq_puts(seq, "\nUdp:");
433	for (i = 0; snmp4_udp_list[i].name; i++)
434		seq_printf(seq, " %lu", buff[i]);
435
436	memset(buff, 0, TCPUDP_MIB_MAX * sizeof(unsigned long));
437
438	/* the UDP and UDP-Lite MIBs are the same */
439	seq_puts(seq, "\nUdpLite:");
440	snmp_get_cpu_field_batch(buff, snmp4_udp_list,
441				 net->mib.udplite_statistics);
442	for (i = 0; snmp4_udp_list[i].name; i++)
443		seq_printf(seq, " %s", snmp4_udp_list[i].name);
444	seq_puts(seq, "\nUdpLite:");
445	for (i = 0; snmp4_udp_list[i].name; i++)
446		seq_printf(seq, " %lu", buff[i]);
447
448	seq_putc(seq, '\n');
449	return 0;
450}
451
452static int snmp_seq_show(struct seq_file *seq, void *v)
453{
454	snmp_seq_show_ipstats(seq, v);
455
456	icmp_put(seq);	/* RFC 2011 compatibility */
457	icmpmsg_put(seq);
458
459	snmp_seq_show_tcp_udp(seq, v);
460
461	return 0;
462}
463
464/*
465 *	Output /proc/net/netstat
466 */
467static int netstat_seq_show(struct seq_file *seq, void *v)
468{
469	const int ip_cnt = ARRAY_SIZE(snmp4_ipextstats_list) - 1;
470	const int tcp_cnt = ARRAY_SIZE(snmp4_net_list) - 1;
471	struct net *net = seq->private;
472	unsigned long *buff;
473	int i;
474
475	seq_puts(seq, "TcpExt:");
476	for (i = 0; i < tcp_cnt; i++)
477		seq_printf(seq, " %s", snmp4_net_list[i].name);
478
479	seq_puts(seq, "\nTcpExt:");
480	buff = kzalloc(max(tcp_cnt * sizeof(long), ip_cnt * sizeof(u64)),
481		       GFP_KERNEL);
482	if (buff) {
483		snmp_get_cpu_field_batch(buff, snmp4_net_list,
484					 net->mib.net_statistics);
485		for (i = 0; i < tcp_cnt; i++)
486			seq_printf(seq, " %lu", buff[i]);
487	} else {
488		for (i = 0; i < tcp_cnt; i++)
489			seq_printf(seq, " %lu",
490				   snmp_fold_field(net->mib.net_statistics,
491						   snmp4_net_list[i].entry));
492	}
493	seq_puts(seq, "\nIpExt:");
494	for (i = 0; i < ip_cnt; i++)
495		seq_printf(seq, " %s", snmp4_ipextstats_list[i].name);
496
497	seq_puts(seq, "\nIpExt:");
498	if (buff) {
499		u64 *buff64 = (u64 *)buff;
500
501		memset(buff64, 0, ip_cnt * sizeof(u64));
502		snmp_get_cpu_field64_batch(buff64, snmp4_ipextstats_list,
503					   net->mib.ip_statistics,
504					   offsetof(struct ipstats_mib, syncp));
505		for (i = 0; i < ip_cnt; i++)
506			seq_printf(seq, " %llu", buff64[i]);
507	} else {
508		for (i = 0; i < ip_cnt; i++)
509			seq_printf(seq, " %llu",
510				   snmp_fold_field64(net->mib.ip_statistics,
511						     snmp4_ipextstats_list[i].entry,
512						     offsetof(struct ipstats_mib, syncp)));
513	}
514	kfree(buff);
515	seq_putc(seq, '\n');
516	mptcp_seq_show(seq);
517	return 0;
518}
519
520static __net_init int ip_proc_init_net(struct net *net)
521{
522	if (!proc_create_net_single("sockstat", 0444, net->proc_net,
523			sockstat_seq_show, NULL))
524		goto out_sockstat;
525	if (!proc_create_net_single("netstat", 0444, net->proc_net,
526			netstat_seq_show, NULL))
527		goto out_netstat;
528	if (!proc_create_net_single("snmp", 0444, net->proc_net, snmp_seq_show,
529			NULL))
530		goto out_snmp;
531
532	return 0;
533
534out_snmp:
535	remove_proc_entry("netstat", net->proc_net);
536out_netstat:
537	remove_proc_entry("sockstat", net->proc_net);
538out_sockstat:
539	return -ENOMEM;
540}
541
542static __net_exit void ip_proc_exit_net(struct net *net)
543{
544	remove_proc_entry("snmp", net->proc_net);
545	remove_proc_entry("netstat", net->proc_net);
546	remove_proc_entry("sockstat", net->proc_net);
547}
548
549static __net_initdata struct pernet_operations ip_proc_ops = {
550	.init = ip_proc_init_net,
551	.exit = ip_proc_exit_net,
552};
553
554int __init ip_misc_proc_init(void)
555{
556	return register_pernet_subsys(&ip_proc_ops);
557}

  1// SPDX-License-Identifier: GPL-2.0-or-later
  2/*
  3 * INET		An implementation of the TCP/IP protocol suite for the LINUX
  4 *		operating system.  INET is implemented using the  BSD Socket
  5 *		interface as the means of communication with the user level.
  6 *
  7 *		This file implements the various access functions for the
  8 *		PROC file system.  It is mainly used for debugging and
  9 *		statistics.
 10 *
 11 * Authors:	Fred N. van Kempen, <waltje@uWalt.NL.Mugnet.ORG>
 12 *		Gerald J. Heim, <heim@peanuts.informatik.uni-tuebingen.de>
 13 *		Fred Baumgarten, <dc6iq@insu1.etec.uni-karlsruhe.de>
 14 *		Erik Schoenfelder, <schoenfr@ibr.cs.tu-bs.de>
 15 *
 16 * Fixes:
 17 *		Alan Cox	:	UDP sockets show the rxqueue/txqueue
 18 *					using hint flag for the netinfo.
 19 *	Pauline Middelink	:	identd support
 20 *		Alan Cox	:	Make /proc safer.
 21 *	Erik Schoenfelder	:	/proc/net/snmp
 22 *		Alan Cox	:	Handle dead sockets properly.
 23 *	Gerhard Koerting	:	Show both timers
 24 *		Alan Cox	:	Allow inode to be NULL (kernel socket)
 25 *	Andi Kleen		:	Add support for open_requests and
 26 *					split functions for more readibility.
 27 *	Andi Kleen		:	Add support for /proc/net/netstat
 28 *	Arnaldo C. Melo		:	Convert to seq_file
 29 */
 30#include <linux/types.h>
 31#include <net/net_namespace.h>
 32#include <net/icmp.h>
 33#include <net/protocol.h>
 34#include <net/tcp.h>
 35#include <net/mptcp.h>
 36#include <net/udp.h>
 37#include <net/udplite.h>
 38#include <linux/bottom_half.h>
 39#include <linux/inetdevice.h>
 40#include <linux/proc_fs.h>
 41#include <linux/seq_file.h>
 42#include <linux/export.h>
 43#include <net/sock.h>
 44#include <net/raw.h>
 45
 46#define TCPUDP_MIB_MAX max_t(u32, UDP_MIB_MAX, TCP_MIB_MAX)
 47
 48/*
 49 *	Report socket allocation statistics [mea@utu.fi]
 50 */
 51static int sockstat_seq_show(struct seq_file *seq, void *v)
 52{
 53	struct net *net = seq->private;
 54	int orphans, sockets;
 55
 56	orphans = tcp_orphan_count_sum();
 57	sockets = proto_sockets_allocated_sum_positive(&tcp_prot);
 58
 59	socket_seq_show(seq);
 60	seq_printf(seq, "TCP: inuse %d orphan %d tw %d alloc %d mem %ld\n",
 61		   sock_prot_inuse_get(net, &tcp_prot), orphans,
 62		   refcount_read(&net->ipv4.tcp_death_row.tw_refcount) - 1,
 63		   sockets, proto_memory_allocated(&tcp_prot));
 64	seq_printf(seq, "UDP: inuse %d mem %ld\n",
 65		   sock_prot_inuse_get(net, &udp_prot),
 66		   proto_memory_allocated(&udp_prot));
 67	seq_printf(seq, "UDPLITE: inuse %d\n",
 68		   sock_prot_inuse_get(net, &udplite_prot));
 69	seq_printf(seq, "RAW: inuse %d\n",
 70		   sock_prot_inuse_get(net, &raw_prot));
 71	seq_printf(seq,  "FRAG: inuse %u memory %lu\n",
 72		   atomic_read(&net->ipv4.fqdir->rhashtable.nelems),
 73		   frag_mem_limit(net->ipv4.fqdir));
 74	return 0;
 75}
 76
 77/* snmp items */
 78static const struct snmp_mib snmp4_ipstats_list[] = {
 79	SNMP_MIB_ITEM("InReceives", IPSTATS_MIB_INPKTS),
 80	SNMP_MIB_ITEM("InHdrErrors", IPSTATS_MIB_INHDRERRORS),
 81	SNMP_MIB_ITEM("InAddrErrors", IPSTATS_MIB_INADDRERRORS),
 82	SNMP_MIB_ITEM("ForwDatagrams", IPSTATS_MIB_OUTFORWDATAGRAMS),
 83	SNMP_MIB_ITEM("InUnknownProtos", IPSTATS_MIB_INUNKNOWNPROTOS),
 84	SNMP_MIB_ITEM("InDiscards", IPSTATS_MIB_INDISCARDS),
 85	SNMP_MIB_ITEM("InDelivers", IPSTATS_MIB_INDELIVERS),
 86	SNMP_MIB_ITEM("OutRequests", IPSTATS_MIB_OUTPKTS),
 87	SNMP_MIB_ITEM("OutDiscards", IPSTATS_MIB_OUTDISCARDS),
 88	SNMP_MIB_ITEM("OutNoRoutes", IPSTATS_MIB_OUTNOROUTES),
 89	SNMP_MIB_ITEM("ReasmTimeout", IPSTATS_MIB_REASMTIMEOUT),
 90	SNMP_MIB_ITEM("ReasmReqds", IPSTATS_MIB_REASMREQDS),
 91	SNMP_MIB_ITEM("ReasmOKs", IPSTATS_MIB_REASMOKS),
 92	SNMP_MIB_ITEM("ReasmFails", IPSTATS_MIB_REASMFAILS),
 93	SNMP_MIB_ITEM("FragOKs", IPSTATS_MIB_FRAGOKS),
 94	SNMP_MIB_ITEM("FragFails", IPSTATS_MIB_FRAGFAILS),
 95	SNMP_MIB_ITEM("FragCreates", IPSTATS_MIB_FRAGCREATES),
 96	SNMP_MIB_SENTINEL
 97};
 98
 99/* Following items are displayed in /proc/net/netstat */
100static const struct snmp_mib snmp4_ipextstats_list[] = {
101	SNMP_MIB_ITEM("InNoRoutes", IPSTATS_MIB_INNOROUTES),
102	SNMP_MIB_ITEM("InTruncatedPkts", IPSTATS_MIB_INTRUNCATEDPKTS),
103	SNMP_MIB_ITEM("InMcastPkts", IPSTATS_MIB_INMCASTPKTS),
104	SNMP_MIB_ITEM("OutMcastPkts", IPSTATS_MIB_OUTMCASTPKTS),
105	SNMP_MIB_ITEM("InBcastPkts", IPSTATS_MIB_INBCASTPKTS),
106	SNMP_MIB_ITEM("OutBcastPkts", IPSTATS_MIB_OUTBCASTPKTS),
107	SNMP_MIB_ITEM("InOctets", IPSTATS_MIB_INOCTETS),
108	SNMP_MIB_ITEM("OutOctets", IPSTATS_MIB_OUTOCTETS),
109	SNMP_MIB_ITEM("InMcastOctets", IPSTATS_MIB_INMCASTOCTETS),
110	SNMP_MIB_ITEM("OutMcastOctets", IPSTATS_MIB_OUTMCASTOCTETS),
111	SNMP_MIB_ITEM("InBcastOctets", IPSTATS_MIB_INBCASTOCTETS),
112	SNMP_MIB_ITEM("OutBcastOctets", IPSTATS_MIB_OUTBCASTOCTETS),
113	/* Non RFC4293 fields */
114	SNMP_MIB_ITEM("InCsumErrors", IPSTATS_MIB_CSUMERRORS),
115	SNMP_MIB_ITEM("InNoECTPkts", IPSTATS_MIB_NOECTPKTS),
116	SNMP_MIB_ITEM("InECT1Pkts", IPSTATS_MIB_ECT1PKTS),
117	SNMP_MIB_ITEM("InECT0Pkts", IPSTATS_MIB_ECT0PKTS),
118	SNMP_MIB_ITEM("InCEPkts", IPSTATS_MIB_CEPKTS),
119	SNMP_MIB_ITEM("ReasmOverlaps", IPSTATS_MIB_REASM_OVERLAPS),
120	SNMP_MIB_SENTINEL
121};
122
123static const struct {
124	const char *name;
125	int index;
126} icmpmibmap[] = {
127	{ "DestUnreachs", ICMP_DEST_UNREACH },
128	{ "TimeExcds", ICMP_TIME_EXCEEDED },
129	{ "ParmProbs", ICMP_PARAMETERPROB },
130	{ "SrcQuenchs", ICMP_SOURCE_QUENCH },
131	{ "Redirects", ICMP_REDIRECT },
132	{ "Echos", ICMP_ECHO },
133	{ "EchoReps", ICMP_ECHOREPLY },
134	{ "Timestamps", ICMP_TIMESTAMP },
135	{ "TimestampReps", ICMP_TIMESTAMPREPLY },
136	{ "AddrMasks", ICMP_ADDRESS },
137	{ "AddrMaskReps", ICMP_ADDRESSREPLY },
138	{ NULL, 0 }
139};
140
141
142static const struct snmp_mib snmp4_tcp_list[] = {
143	SNMP_MIB_ITEM("RtoAlgorithm", TCP_MIB_RTOALGORITHM),
144	SNMP_MIB_ITEM("RtoMin", TCP_MIB_RTOMIN),
145	SNMP_MIB_ITEM("RtoMax", TCP_MIB_RTOMAX),
146	SNMP_MIB_ITEM("MaxConn", TCP_MIB_MAXCONN),
147	SNMP_MIB_ITEM("ActiveOpens", TCP_MIB_ACTIVEOPENS),
148	SNMP_MIB_ITEM("PassiveOpens", TCP_MIB_PASSIVEOPENS),
149	SNMP_MIB_ITEM("AttemptFails", TCP_MIB_ATTEMPTFAILS),
150	SNMP_MIB_ITEM("EstabResets", TCP_MIB_ESTABRESETS),
151	SNMP_MIB_ITEM("CurrEstab", TCP_MIB_CURRESTAB),
152	SNMP_MIB_ITEM("InSegs", TCP_MIB_INSEGS),
153	SNMP_MIB_ITEM("OutSegs", TCP_MIB_OUTSEGS),
154	SNMP_MIB_ITEM("RetransSegs", TCP_MIB_RETRANSSEGS),
155	SNMP_MIB_ITEM("InErrs", TCP_MIB_INERRS),
156	SNMP_MIB_ITEM("OutRsts", TCP_MIB_OUTRSTS),
157	SNMP_MIB_ITEM("InCsumErrors", TCP_MIB_CSUMERRORS),
158	SNMP_MIB_SENTINEL
159};
160
161static const struct snmp_mib snmp4_udp_list[] = {
162	SNMP_MIB_ITEM("InDatagrams", UDP_MIB_INDATAGRAMS),
163	SNMP_MIB_ITEM("NoPorts", UDP_MIB_NOPORTS),
164	SNMP_MIB_ITEM("InErrors", UDP_MIB_INERRORS),
165	SNMP_MIB_ITEM("OutDatagrams", UDP_MIB_OUTDATAGRAMS),
166	SNMP_MIB_ITEM("RcvbufErrors", UDP_MIB_RCVBUFERRORS),
167	SNMP_MIB_ITEM("SndbufErrors", UDP_MIB_SNDBUFERRORS),
168	SNMP_MIB_ITEM("InCsumErrors", UDP_MIB_CSUMERRORS),
169	SNMP_MIB_ITEM("IgnoredMulti", UDP_MIB_IGNOREDMULTI),
170	SNMP_MIB_ITEM("MemErrors", UDP_MIB_MEMERRORS),
171	SNMP_MIB_SENTINEL
172};
173
174static const struct snmp_mib snmp4_net_list[] = {
175	SNMP_MIB_ITEM("SyncookiesSent", LINUX_MIB_SYNCOOKIESSENT),
176	SNMP_MIB_ITEM("SyncookiesRecv", LINUX_MIB_SYNCOOKIESRECV),
177	SNMP_MIB_ITEM("SyncookiesFailed", LINUX_MIB_SYNCOOKIESFAILED),
178	SNMP_MIB_ITEM("EmbryonicRsts", LINUX_MIB_EMBRYONICRSTS),
179	SNMP_MIB_ITEM("PruneCalled", LINUX_MIB_PRUNECALLED),
180	SNMP_MIB_ITEM("RcvPruned", LINUX_MIB_RCVPRUNED),
181	SNMP_MIB_ITEM("OfoPruned", LINUX_MIB_OFOPRUNED),
182	SNMP_MIB_ITEM("OutOfWindowIcmps", LINUX_MIB_OUTOFWINDOWICMPS),
183	SNMP_MIB_ITEM("LockDroppedIcmps", LINUX_MIB_LOCKDROPPEDICMPS),
184	SNMP_MIB_ITEM("ArpFilter", LINUX_MIB_ARPFILTER),
185	SNMP_MIB_ITEM("TW", LINUX_MIB_TIMEWAITED),
186	SNMP_MIB_ITEM("TWRecycled", LINUX_MIB_TIMEWAITRECYCLED),
187	SNMP_MIB_ITEM("TWKilled", LINUX_MIB_TIMEWAITKILLED),
188	SNMP_MIB_ITEM("PAWSActive", LINUX_MIB_PAWSACTIVEREJECTED),
189	SNMP_MIB_ITEM("PAWSEstab", LINUX_MIB_PAWSESTABREJECTED),
190	SNMP_MIB_ITEM("DelayedACKs", LINUX_MIB_DELAYEDACKS),
191	SNMP_MIB_ITEM("DelayedACKLocked", LINUX_MIB_DELAYEDACKLOCKED),
192	SNMP_MIB_ITEM("DelayedACKLost", LINUX_MIB_DELAYEDACKLOST),
193	SNMP_MIB_ITEM("ListenOverflows", LINUX_MIB_LISTENOVERFLOWS),
194	SNMP_MIB_ITEM("ListenDrops", LINUX_MIB_LISTENDROPS),
195	SNMP_MIB_ITEM("TCPHPHits", LINUX_MIB_TCPHPHITS),
196	SNMP_MIB_ITEM("TCPPureAcks", LINUX_MIB_TCPPUREACKS),
197	SNMP_MIB_ITEM("TCPHPAcks", LINUX_MIB_TCPHPACKS),
198	SNMP_MIB_ITEM("TCPRenoRecovery", LINUX_MIB_TCPRENORECOVERY),
199	SNMP_MIB_ITEM("TCPSackRecovery", LINUX_MIB_TCPSACKRECOVERY),
200	SNMP_MIB_ITEM("TCPSACKReneging", LINUX_MIB_TCPSACKRENEGING),
201	SNMP_MIB_ITEM("TCPSACKReorder", LINUX_MIB_TCPSACKREORDER),
202	SNMP_MIB_ITEM("TCPRenoReorder", LINUX_MIB_TCPRENOREORDER),
203	SNMP_MIB_ITEM("TCPTSReorder", LINUX_MIB_TCPTSREORDER),
204	SNMP_MIB_ITEM("TCPFullUndo", LINUX_MIB_TCPFULLUNDO),
205	SNMP_MIB_ITEM("TCPPartialUndo", LINUX_MIB_TCPPARTIALUNDO),
206	SNMP_MIB_ITEM("TCPDSACKUndo", LINUX_MIB_TCPDSACKUNDO),
207	SNMP_MIB_ITEM("TCPLossUndo", LINUX_MIB_TCPLOSSUNDO),
208	SNMP_MIB_ITEM("TCPLostRetransmit", LINUX_MIB_TCPLOSTRETRANSMIT),
209	SNMP_MIB_ITEM("TCPRenoFailures", LINUX_MIB_TCPRENOFAILURES),
210	SNMP_MIB_ITEM("TCPSackFailures", LINUX_MIB_TCPSACKFAILURES),
211	SNMP_MIB_ITEM("TCPLossFailures", LINUX_MIB_TCPLOSSFAILURES),
212	SNMP_MIB_ITEM("TCPFastRetrans", LINUX_MIB_TCPFASTRETRANS),
213	SNMP_MIB_ITEM("TCPSlowStartRetrans", LINUX_MIB_TCPSLOWSTARTRETRANS),
214	SNMP_MIB_ITEM("TCPTimeouts", LINUX_MIB_TCPTIMEOUTS),
215	SNMP_MIB_ITEM("TCPLossProbes", LINUX_MIB_TCPLOSSPROBES),
216	SNMP_MIB_ITEM("TCPLossProbeRecovery", LINUX_MIB_TCPLOSSPROBERECOVERY),
217	SNMP_MIB_ITEM("TCPRenoRecoveryFail", LINUX_MIB_TCPRENORECOVERYFAIL),
218	SNMP_MIB_ITEM("TCPSackRecoveryFail", LINUX_MIB_TCPSACKRECOVERYFAIL),
219	SNMP_MIB_ITEM("TCPRcvCollapsed", LINUX_MIB_TCPRCVCOLLAPSED),
220	SNMP_MIB_ITEM("TCPBacklogCoalesce", LINUX_MIB_TCPBACKLOGCOALESCE),
221	SNMP_MIB_ITEM("TCPDSACKOldSent", LINUX_MIB_TCPDSACKOLDSENT),
222	SNMP_MIB_ITEM("TCPDSACKOfoSent", LINUX_MIB_TCPDSACKOFOSENT),
223	SNMP_MIB_ITEM("TCPDSACKRecv", LINUX_MIB_TCPDSACKRECV),
224	SNMP_MIB_ITEM("TCPDSACKOfoRecv", LINUX_MIB_TCPDSACKOFORECV),
225	SNMP_MIB_ITEM("TCPAbortOnData", LINUX_MIB_TCPABORTONDATA),
226	SNMP_MIB_ITEM("TCPAbortOnClose", LINUX_MIB_TCPABORTONCLOSE),
227	SNMP_MIB_ITEM("TCPAbortOnMemory", LINUX_MIB_TCPABORTONMEMORY),
228	SNMP_MIB_ITEM("TCPAbortOnTimeout", LINUX_MIB_TCPABORTONTIMEOUT),
229	SNMP_MIB_ITEM("TCPAbortOnLinger", LINUX_MIB_TCPABORTONLINGER),
230	SNMP_MIB_ITEM("TCPAbortFailed", LINUX_MIB_TCPABORTFAILED),
231	SNMP_MIB_ITEM("TCPMemoryPressures", LINUX_MIB_TCPMEMORYPRESSURES),
232	SNMP_MIB_ITEM("TCPMemoryPressuresChrono", LINUX_MIB_TCPMEMORYPRESSURESCHRONO),
233	SNMP_MIB_ITEM("TCPSACKDiscard", LINUX_MIB_TCPSACKDISCARD),
234	SNMP_MIB_ITEM("TCPDSACKIgnoredOld", LINUX_MIB_TCPDSACKIGNOREDOLD),
235	SNMP_MIB_ITEM("TCPDSACKIgnoredNoUndo", LINUX_MIB_TCPDSACKIGNOREDNOUNDO),
236	SNMP_MIB_ITEM("TCPSpuriousRTOs", LINUX_MIB_TCPSPURIOUSRTOS),
237	SNMP_MIB_ITEM("TCPMD5NotFound", LINUX_MIB_TCPMD5NOTFOUND),
238	SNMP_MIB_ITEM("TCPMD5Unexpected", LINUX_MIB_TCPMD5UNEXPECTED),
239	SNMP_MIB_ITEM("TCPMD5Failure", LINUX_MIB_TCPMD5FAILURE),
240	SNMP_MIB_ITEM("TCPSackShifted", LINUX_MIB_SACKSHIFTED),
241	SNMP_MIB_ITEM("TCPSackMerged", LINUX_MIB_SACKMERGED),
242	SNMP_MIB_ITEM("TCPSackShiftFallback", LINUX_MIB_SACKSHIFTFALLBACK),
243	SNMP_MIB_ITEM("TCPBacklogDrop", LINUX_MIB_TCPBACKLOGDROP),
244	SNMP_MIB_ITEM("PFMemallocDrop", LINUX_MIB_PFMEMALLOCDROP),
245	SNMP_MIB_ITEM("TCPMinTTLDrop", LINUX_MIB_TCPMINTTLDROP),
246	SNMP_MIB_ITEM("TCPDeferAcceptDrop", LINUX_MIB_TCPDEFERACCEPTDROP),
247	SNMP_MIB_ITEM("IPReversePathFilter", LINUX_MIB_IPRPFILTER),
248	SNMP_MIB_ITEM("TCPTimeWaitOverflow", LINUX_MIB_TCPTIMEWAITOVERFLOW),
249	SNMP_MIB_ITEM("TCPReqQFullDoCookies", LINUX_MIB_TCPREQQFULLDOCOOKIES),
250	SNMP_MIB_ITEM("TCPReqQFullDrop", LINUX_MIB_TCPREQQFULLDROP),
251	SNMP_MIB_ITEM("TCPRetransFail", LINUX_MIB_TCPRETRANSFAIL),
252	SNMP_MIB_ITEM("TCPRcvCoalesce", LINUX_MIB_TCPRCVCOALESCE),
253	SNMP_MIB_ITEM("TCPOFOQueue", LINUX_MIB_TCPOFOQUEUE),
254	SNMP_MIB_ITEM("TCPOFODrop", LINUX_MIB_TCPOFODROP),
255	SNMP_MIB_ITEM("TCPOFOMerge", LINUX_MIB_TCPOFOMERGE),
256	SNMP_MIB_ITEM("TCPChallengeACK", LINUX_MIB_TCPCHALLENGEACK),
257	SNMP_MIB_ITEM("TCPSYNChallenge", LINUX_MIB_TCPSYNCHALLENGE),
258	SNMP_MIB_ITEM("TCPFastOpenActive", LINUX_MIB_TCPFASTOPENACTIVE),
259	SNMP_MIB_ITEM("TCPFastOpenActiveFail", LINUX_MIB_TCPFASTOPENACTIVEFAIL),
260	SNMP_MIB_ITEM("TCPFastOpenPassive", LINUX_MIB_TCPFASTOPENPASSIVE),
261	SNMP_MIB_ITEM("TCPFastOpenPassiveFail", LINUX_MIB_TCPFASTOPENPASSIVEFAIL),
262	SNMP_MIB_ITEM("TCPFastOpenListenOverflow", LINUX_MIB_TCPFASTOPENLISTENOVERFLOW),
263	SNMP_MIB_ITEM("TCPFastOpenCookieReqd", LINUX_MIB_TCPFASTOPENCOOKIEREQD),
264	SNMP_MIB_ITEM("TCPFastOpenBlackhole", LINUX_MIB_TCPFASTOPENBLACKHOLE),
265	SNMP_MIB_ITEM("TCPSpuriousRtxHostQueues", LINUX_MIB_TCPSPURIOUS_RTX_HOSTQUEUES),
266	SNMP_MIB_ITEM("BusyPollRxPackets", LINUX_MIB_BUSYPOLLRXPACKETS),
267	SNMP_MIB_ITEM("TCPAutoCorking", LINUX_MIB_TCPAUTOCORKING),
268	SNMP_MIB_ITEM("TCPFromZeroWindowAdv", LINUX_MIB_TCPFROMZEROWINDOWADV),
269	SNMP_MIB_ITEM("TCPToZeroWindowAdv", LINUX_MIB_TCPTOZEROWINDOWADV),
270	SNMP_MIB_ITEM("TCPWantZeroWindowAdv", LINUX_MIB_TCPWANTZEROWINDOWADV),
271	SNMP_MIB_ITEM("TCPSynRetrans", LINUX_MIB_TCPSYNRETRANS),
272	SNMP_MIB_ITEM("TCPOrigDataSent", LINUX_MIB_TCPORIGDATASENT),
273	SNMP_MIB_ITEM("TCPHystartTrainDetect", LINUX_MIB_TCPHYSTARTTRAINDETECT),
274	SNMP_MIB_ITEM("TCPHystartTrainCwnd", LINUX_MIB_TCPHYSTARTTRAINCWND),
275	SNMP_MIB_ITEM("TCPHystartDelayDetect", LINUX_MIB_TCPHYSTARTDELAYDETECT),
276	SNMP_MIB_ITEM("TCPHystartDelayCwnd", LINUX_MIB_TCPHYSTARTDELAYCWND),
277	SNMP_MIB_ITEM("TCPACKSkippedSynRecv", LINUX_MIB_TCPACKSKIPPEDSYNRECV),
278	SNMP_MIB_ITEM("TCPACKSkippedPAWS", LINUX_MIB_TCPACKSKIPPEDPAWS),
279	SNMP_MIB_ITEM("TCPACKSkippedSeq", LINUX_MIB_TCPACKSKIPPEDSEQ),
280	SNMP_MIB_ITEM("TCPACKSkippedFinWait2", LINUX_MIB_TCPACKSKIPPEDFINWAIT2),
281	SNMP_MIB_ITEM("TCPACKSkippedTimeWait", LINUX_MIB_TCPACKSKIPPEDTIMEWAIT),
282	SNMP_MIB_ITEM("TCPACKSkippedChallenge", LINUX_MIB_TCPACKSKIPPEDCHALLENGE),
283	SNMP_MIB_ITEM("TCPWinProbe", LINUX_MIB_TCPWINPROBE),
284	SNMP_MIB_ITEM("TCPKeepAlive", LINUX_MIB_TCPKEEPALIVE),
285	SNMP_MIB_ITEM("TCPMTUPFail", LINUX_MIB_TCPMTUPFAIL),
286	SNMP_MIB_ITEM("TCPMTUPSuccess", LINUX_MIB_TCPMTUPSUCCESS),
287	SNMP_MIB_ITEM("TCPDelivered", LINUX_MIB_TCPDELIVERED),
288	SNMP_MIB_ITEM("TCPDeliveredCE", LINUX_MIB_TCPDELIVEREDCE),
289	SNMP_MIB_ITEM("TCPAckCompressed", LINUX_MIB_TCPACKCOMPRESSED),
290	SNMP_MIB_ITEM("TCPZeroWindowDrop", LINUX_MIB_TCPZEROWINDOWDROP),
291	SNMP_MIB_ITEM("TCPRcvQDrop", LINUX_MIB_TCPRCVQDROP),
292	SNMP_MIB_ITEM("TCPWqueueTooBig", LINUX_MIB_TCPWQUEUETOOBIG),
293	SNMP_MIB_ITEM("TCPFastOpenPassiveAltKey", LINUX_MIB_TCPFASTOPENPASSIVEALTKEY),
294	SNMP_MIB_ITEM("TcpTimeoutRehash", LINUX_MIB_TCPTIMEOUTREHASH),
295	SNMP_MIB_ITEM("TcpDuplicateDataRehash", LINUX_MIB_TCPDUPLICATEDATAREHASH),
296	SNMP_MIB_ITEM("TCPDSACKRecvSegs", LINUX_MIB_TCPDSACKRECVSEGS),
297	SNMP_MIB_ITEM("TCPDSACKIgnoredDubious", LINUX_MIB_TCPDSACKIGNOREDDUBIOUS),
298	SNMP_MIB_ITEM("TCPMigrateReqSuccess", LINUX_MIB_TCPMIGRATEREQSUCCESS),
299	SNMP_MIB_ITEM("TCPMigrateReqFailure", LINUX_MIB_TCPMIGRATEREQFAILURE),
300	SNMP_MIB_ITEM("TCPPLBRehash", LINUX_MIB_TCPPLBREHASH),
301	SNMP_MIB_SENTINEL
302};
303
304static void icmpmsg_put_line(struct seq_file *seq, unsigned long *vals,
305			     unsigned short *type, int count)
306{
307	int j;
308
309	if (count) {
310		seq_puts(seq, "\nIcmpMsg:");
311		for (j = 0; j < count; ++j)
312			seq_printf(seq, " %sType%u",
313				type[j] & 0x100 ? "Out" : "In",
314				type[j] & 0xff);
315		seq_puts(seq, "\nIcmpMsg:");
316		for (j = 0; j < count; ++j)
317			seq_printf(seq, " %lu", vals[j]);
318	}
319}
320
321static void icmpmsg_put(struct seq_file *seq)
322{
323#define PERLINE	16
324
325	int i, count;
326	unsigned short type[PERLINE];
327	unsigned long vals[PERLINE], val;
328	struct net *net = seq->private;
329
330	count = 0;
331	for (i = 0; i < ICMPMSG_MIB_MAX; i++) {
332		val = atomic_long_read(&net->mib.icmpmsg_statistics->mibs[i]);
333		if (val) {
334			type[count] = i;
335			vals[count++] = val;
336		}
337		if (count == PERLINE) {
338			icmpmsg_put_line(seq, vals, type, count);
339			count = 0;
340		}
341	}
342	icmpmsg_put_line(seq, vals, type, count);
343
344#undef PERLINE
345}
346
347static void icmp_put(struct seq_file *seq)
348{
349	int i;
350	struct net *net = seq->private;
351	atomic_long_t *ptr = net->mib.icmpmsg_statistics->mibs;
352
353	seq_puts(seq, "\nIcmp: InMsgs InErrors InCsumErrors");
354	for (i = 0; icmpmibmap[i].name; i++)
355		seq_printf(seq, " In%s", icmpmibmap[i].name);
356	seq_puts(seq, " OutMsgs OutErrors");
357	for (i = 0; icmpmibmap[i].name; i++)
358		seq_printf(seq, " Out%s", icmpmibmap[i].name);
359	seq_printf(seq, "\nIcmp: %lu %lu %lu",
360		snmp_fold_field(net->mib.icmp_statistics, ICMP_MIB_INMSGS),
361		snmp_fold_field(net->mib.icmp_statistics, ICMP_MIB_INERRORS),
362		snmp_fold_field(net->mib.icmp_statistics, ICMP_MIB_CSUMERRORS));
363	for (i = 0; icmpmibmap[i].name; i++)
364		seq_printf(seq, " %lu",
365			   atomic_long_read(ptr + icmpmibmap[i].index));
366	seq_printf(seq, " %lu %lu",
367		snmp_fold_field(net->mib.icmp_statistics, ICMP_MIB_OUTMSGS),
368		snmp_fold_field(net->mib.icmp_statistics, ICMP_MIB_OUTERRORS));
369	for (i = 0; icmpmibmap[i].name; i++)
370		seq_printf(seq, " %lu",
371			   atomic_long_read(ptr + (icmpmibmap[i].index | 0x100)));
372}
373
374/*
375 *	Called from the PROCfs module. This outputs /proc/net/snmp.
376 */
377static int snmp_seq_show_ipstats(struct seq_file *seq, void *v)
378{
379	struct net *net = seq->private;
380	u64 buff64[IPSTATS_MIB_MAX];
381	int i;
382
383	memset(buff64, 0, IPSTATS_MIB_MAX * sizeof(u64));
384
385	seq_puts(seq, "Ip: Forwarding DefaultTTL");
386	for (i = 0; snmp4_ipstats_list[i].name; i++)
387		seq_printf(seq, " %s", snmp4_ipstats_list[i].name);
388
389	seq_printf(seq, "\nIp: %d %d",
390		   IPV4_DEVCONF_ALL(net, FORWARDING) ? 1 : 2,
391		   READ_ONCE(net->ipv4.sysctl_ip_default_ttl));
392
393	BUILD_BUG_ON(offsetof(struct ipstats_mib, mibs) != 0);
394	snmp_get_cpu_field64_batch(buff64, snmp4_ipstats_list,
395				   net->mib.ip_statistics,
396				   offsetof(struct ipstats_mib, syncp));
397	for (i = 0; snmp4_ipstats_list[i].name; i++)
398		seq_printf(seq, " %llu", buff64[i]);
399
400	return 0;
401}
402
403static int snmp_seq_show_tcp_udp(struct seq_file *seq, void *v)
404{
405	unsigned long buff[TCPUDP_MIB_MAX];
406	struct net *net = seq->private;
407	int i;
408
409	memset(buff, 0, TCPUDP_MIB_MAX * sizeof(unsigned long));
410
411	seq_puts(seq, "\nTcp:");
412	for (i = 0; snmp4_tcp_list[i].name; i++)
413		seq_printf(seq, " %s", snmp4_tcp_list[i].name);
414
415	seq_puts(seq, "\nTcp:");
416	snmp_get_cpu_field_batch(buff, snmp4_tcp_list,
417				 net->mib.tcp_statistics);
418	for (i = 0; snmp4_tcp_list[i].name; i++) {
419		/* MaxConn field is signed, RFC 2012 */
420		if (snmp4_tcp_list[i].entry == TCP_MIB_MAXCONN)
421			seq_printf(seq, " %ld", buff[i]);
422		else
423			seq_printf(seq, " %lu", buff[i]);
424	}
425
426	memset(buff, 0, TCPUDP_MIB_MAX * sizeof(unsigned long));
427
428	snmp_get_cpu_field_batch(buff, snmp4_udp_list,
429				 net->mib.udp_statistics);
430	seq_puts(seq, "\nUdp:");
431	for (i = 0; snmp4_udp_list[i].name; i++)
432		seq_printf(seq, " %s", snmp4_udp_list[i].name);
433	seq_puts(seq, "\nUdp:");
434	for (i = 0; snmp4_udp_list[i].name; i++)
435		seq_printf(seq, " %lu", buff[i]);
436
437	memset(buff, 0, TCPUDP_MIB_MAX * sizeof(unsigned long));
438
439	/* the UDP and UDP-Lite MIBs are the same */
440	seq_puts(seq, "\nUdpLite:");
441	snmp_get_cpu_field_batch(buff, snmp4_udp_list,
442				 net->mib.udplite_statistics);
443	for (i = 0; snmp4_udp_list[i].name; i++)
444		seq_printf(seq, " %s", snmp4_udp_list[i].name);
445	seq_puts(seq, "\nUdpLite:");
446	for (i = 0; snmp4_udp_list[i].name; i++)
447		seq_printf(seq, " %lu", buff[i]);
448
449	seq_putc(seq, '\n');
450	return 0;
451}
452
453static int snmp_seq_show(struct seq_file *seq, void *v)
454{
455	snmp_seq_show_ipstats(seq, v);
456
457	icmp_put(seq);	/* RFC 2011 compatibility */
458	icmpmsg_put(seq);
459
460	snmp_seq_show_tcp_udp(seq, v);
461
462	return 0;
463}
464
465/*
466 *	Output /proc/net/netstat
467 */
468static int netstat_seq_show(struct seq_file *seq, void *v)
469{
470	const int ip_cnt = ARRAY_SIZE(snmp4_ipextstats_list) - 1;
471	const int tcp_cnt = ARRAY_SIZE(snmp4_net_list) - 1;
472	struct net *net = seq->private;
473	unsigned long *buff;
474	int i;
475
476	seq_puts(seq, "TcpExt:");
477	for (i = 0; i < tcp_cnt; i++)
478		seq_printf(seq, " %s", snmp4_net_list[i].name);
479
480	seq_puts(seq, "\nTcpExt:");
481	buff = kzalloc(max(tcp_cnt * sizeof(long), ip_cnt * sizeof(u64)),
482		       GFP_KERNEL);
483	if (buff) {
484		snmp_get_cpu_field_batch(buff, snmp4_net_list,
485					 net->mib.net_statistics);
486		for (i = 0; i < tcp_cnt; i++)
487			seq_printf(seq, " %lu", buff[i]);
488	} else {
489		for (i = 0; i < tcp_cnt; i++)
490			seq_printf(seq, " %lu",
491				   snmp_fold_field(net->mib.net_statistics,
492						   snmp4_net_list[i].entry));
493	}
494	seq_puts(seq, "\nIpExt:");
495	for (i = 0; i < ip_cnt; i++)
496		seq_printf(seq, " %s", snmp4_ipextstats_list[i].name);
497
498	seq_puts(seq, "\nIpExt:");
499	if (buff) {
500		u64 *buff64 = (u64 *)buff;
501
502		memset(buff64, 0, ip_cnt * sizeof(u64));
503		snmp_get_cpu_field64_batch(buff64, snmp4_ipextstats_list,
504					   net->mib.ip_statistics,
505					   offsetof(struct ipstats_mib, syncp));
506		for (i = 0; i < ip_cnt; i++)
507			seq_printf(seq, " %llu", buff64[i]);
508	} else {
509		for (i = 0; i < ip_cnt; i++)
510			seq_printf(seq, " %llu",
511				   snmp_fold_field64(net->mib.ip_statistics,
512						     snmp4_ipextstats_list[i].entry,
513						     offsetof(struct ipstats_mib, syncp)));
514	}
515	kfree(buff);
516	seq_putc(seq, '\n');
517	mptcp_seq_show(seq);
518	return 0;
519}
520
521static __net_init int ip_proc_init_net(struct net *net)
522{
523	if (!proc_create_net_single("sockstat", 0444, net->proc_net,
524			sockstat_seq_show, NULL))
525		goto out_sockstat;
526	if (!proc_create_net_single("netstat", 0444, net->proc_net,
527			netstat_seq_show, NULL))
528		goto out_netstat;
529	if (!proc_create_net_single("snmp", 0444, net->proc_net, snmp_seq_show,
530			NULL))
531		goto out_snmp;
532
533	return 0;
534
535out_snmp:
536	remove_proc_entry("netstat", net->proc_net);
537out_netstat:
538	remove_proc_entry("sockstat", net->proc_net);
539out_sockstat:
540	return -ENOMEM;
541}
542
543static __net_exit void ip_proc_exit_net(struct net *net)
544{
545	remove_proc_entry("snmp", net->proc_net);
546	remove_proc_entry("netstat", net->proc_net);
547	remove_proc_entry("sockstat", net->proc_net);
548}
549
550static __net_initdata struct pernet_operations ip_proc_ops = {
551	.init = ip_proc_init_net,
552	.exit = ip_proc_exit_net,
553};
554
555int __init ip_misc_proc_init(void)
556{
557	return register_pernet_subsys(&ip_proc_ops);
558}