Merge tag 'i3c/for-7.3' of git://git.kernel.org/pub/scm/linux/kernel/git/i3c/linuxgrafted

Pull I3C updates from Alexandre Belloni:
 "A new driver this cycle, for the AMD AXI I3C controller.

  There are also new features such as IBI wakeup support, SETAASA device
  discovery and ACPI support for the the DAA methods, meaning we can now
  communicate with the SPD devices on DDR5 modules.

  New driver:
   - AMD AXI I3C master controller

  Subsystem:
   - I3C Common Command Code (CCC) handling improvements, especially
     around GET CCCs
   - SETAASA device discovery support
   - ACPI support for all existing DAA methods like SETDASA, SETNEWDA as
     well as I2C devices on I3C bus
   - IBI-based wakeup support

  Drivers:
   - dw: SETAASA support
   - mipi-i3c-hci: advertise IBI wakeup capability, AMD_PT I3C
     controller support, PIO queue management support for HCI v1.2
   - renesas: improve suspend to RAM support, add runtime PM support"

* tag 'i3c/for-7.3' of git://git.kernel.org/pub/scm/linux/kernel/git/i3c/linux: (70 commits)
  i3c: dw: reduce do_daa time if there's no client
  i3c: mipi-i3c-hci: Add support for AMD_PT I3C controller
  i3c: mipi-i3c-hci: Add PIO queue management support for HCI v1.2
  i3c: mipi-i3c-hci: Fix missing STAT_IBI_STATUS_THLD in PIO mode
  i3c: dw: rename "pclk" to "apb" to match dt-binding
  i3c: dw: make struct dw_i3c_cmd smaller
  i3c: dw: use COMMAND_PORT_TRANSFER_ARG instead of hardcoding
  i3c: renesas: Don't register devices when ENTDAA times out
  i3c: master: dw-i3c-master: fix OD timing for first broadcast
  i3c: mipi-i3c-hci: Advertise IBI wakeup capability
  i3c: mipi-i3c-hci: Factor out i3c_hci_sysdev()
  i3c: mipi-i3c-hci-pci: Propagate I3C wakeup requirements to PCI
  i3c: master: Reject IBI requests from non-IBI-capable devices
  i3c: master: Add helper to query bus wakeup requirements
  i3c: master: Report wakeup events for IBIs
  i3c: master: Support IBI-based wakeup capability
  i3c: master: Fix potential UAF in i3c_device_match()
  i3c: master: Fix potential UAF in i3c_device_uevent()
  i3c: Make dev->desc locking assumptions explicit
  i3c: master: Fix use-after-free of master->this
  ...

1 files changed, 556 insertions, 0 deletions

diff --git a/net/ipv4/proc.c b/net/ipv4/proc.c
new file mode 100644
index 000000000..bfc06d171
--- /dev/null
+++ b/net/ipv4/proc.c
@@ -0,0 +1,556 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * 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
+ */
+#include <linux/types.h>
+#include <net/net_namespace.h>
+#include <net/icmp.h>
+#include <net/protocol.h>
+#include <net/tcp.h>
+#include <net/mptcp.h>
+#include <net/proto_memory.h>
+#include <net/udp.h>
+#include <linux/bottom_half.h>
+#include <linux/inetdevice.h>
+#include <linux/proc_fs.h>
+#include <linux/seq_file.h>
+#include <linux/export.h>
+#include <net/sock.h>
+#include <net/raw.h>
+
+#define TCPUDP_MIB_MAX MAX_T(u32, UDP_MIB_MAX, TCP_MIB_MAX)
+
+/*
+ *	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;
+
+	orphans = tcp_orphan_count_sum();
+	sockets = proto_sockets_allocated_sum_positive(&tcp_prot);
+
+	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,
+		   refcount_read(&net->ipv4.tcp_death_row.tw_refcount) - 1,
+		   sockets, proto_memory_allocated(&tcp_prot));
+	seq_printf(seq, "UDP: inuse %d mem %ld\n",
+		   sock_prot_inuse_get(net, &udp_prot),
+		   proto_memory_allocated(&udp_prot));
+	seq_printf(seq, "RAW: inuse %d\n",
+		   sock_prot_inuse_get(net, &raw_prot));
+	seq_printf(seq,  "FRAG: inuse %u memory %lu\n",
+		   atomic_read(&net->ipv4.fqdir->rhashtable.nelems),
+		   frag_mem_limit(net->ipv4.fqdir));
+	return 0;
+}
+
+/* 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_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_ITEM("OutTransmits", IPSTATS_MIB_OUTPKTS),
+};
+
+/* Following 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),
+	/* Non RFC4293 fields */
+	SNMP_MIB_ITEM("InCsumErrors", IPSTATS_MIB_CSUMERRORS),
+	SNMP_MIB_ITEM("InNoECTPkts", IPSTATS_MIB_NOECTPKTS),
+	SNMP_MIB_ITEM("InECT1Pkts", IPSTATS_MIB_ECT1PKTS),
+	SNMP_MIB_ITEM("InECT0Pkts", IPSTATS_MIB_ECT0PKTS),
+	SNMP_MIB_ITEM("InCEPkts", IPSTATS_MIB_CEPKTS),
+	SNMP_MIB_ITEM("ReasmOverlaps", IPSTATS_MIB_REASM_OVERLAPS),
+};
+
+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_ITEM("InCsumErrors", TCP_MIB_CSUMERRORS),
+};
+
+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_ITEM("InCsumErrors", UDP_MIB_CSUMERRORS),
+	SNMP_MIB_ITEM("IgnoredMulti", UDP_MIB_IGNOREDMULTI),
+	SNMP_MIB_ITEM("MemErrors", UDP_MIB_MEMERRORS),
+};
+
+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("PAWSActive", LINUX_MIB_PAWSACTIVEREJECTED),
+	SNMP_MIB_ITEM("PAWSEstab", LINUX_MIB_PAWSESTABREJECTED),
+	SNMP_MIB_ITEM("BeyondWindow", LINUX_MIB_BEYOND_WINDOW),
+	SNMP_MIB_ITEM("TSEcrRejected", LINUX_MIB_TSECRREJECTED),
+	SNMP_MIB_ITEM("PAWSOldAck", LINUX_MIB_PAWS_OLD_ACK),
+	SNMP_MIB_ITEM("PAWSTimewait", LINUX_MIB_PAWS_TW_REJECTED),
+	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("TCPHPHits", LINUX_MIB_TCPHPHITS),
+	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("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("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("TCPSlowStartRetrans", LINUX_MIB_TCPSLOWSTARTRETRANS),
+	SNMP_MIB_ITEM("TCPTimeouts", LINUX_MIB_TCPTIMEOUTS),
+	SNMP_MIB_ITEM("TCPLossProbes", LINUX_MIB_TCPLOSSPROBES),
+	SNMP_MIB_ITEM("TCPLossProbeRecovery", LINUX_MIB_TCPLOSSPROBERECOVERY),
+	SNMP_MIB_ITEM("TCPRenoRecoveryFail", LINUX_MIB_TCPRENORECOVERYFAIL),
+	SNMP_MIB_ITEM("TCPSackRecoveryFail", LINUX_MIB_TCPSACKRECOVERYFAIL),
+	SNMP_MIB_ITEM("TCPRcvCollapsed", LINUX_MIB_TCPRCVCOLLAPSED),
+	SNMP_MIB_ITEM("TCPBacklogCoalesce", LINUX_MIB_TCPBACKLOGCOALESCE),
+	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("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("TCPMemoryPressuresChrono", LINUX_MIB_TCPMEMORYPRESSURESCHRONO),
+	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("TCPMD5Failure", LINUX_MIB_TCPMD5FAILURE),
+	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("PFMemallocDrop", LINUX_MIB_PFMEMALLOCDROP),
+	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_ITEM("TCPReqQFullDoCookies", LINUX_MIB_TCPREQQFULLDOCOOKIES),
+	SNMP_MIB_ITEM("TCPReqQFullDrop", LINUX_MIB_TCPREQQFULLDROP),
+	SNMP_MIB_ITEM("TCPRetransFail", LINUX_MIB_TCPRETRANSFAIL),
+	SNMP_MIB_ITEM("TCPRcvCoalesce", LINUX_MIB_TCPRCVCOALESCE),
+	SNMP_MIB_ITEM("TCPOFOQueue", LINUX_MIB_TCPOFOQUEUE),
+	SNMP_MIB_ITEM("TCPOFODrop", LINUX_MIB_TCPOFODROP),
+	SNMP_MIB_ITEM("TCPOFOMerge", LINUX_MIB_TCPOFOMERGE),
+	SNMP_MIB_ITEM("TCPChallengeACK", LINUX_MIB_TCPCHALLENGEACK),
+	SNMP_MIB_ITEM("TCPSYNChallenge", LINUX_MIB_TCPSYNCHALLENGE),
+	SNMP_MIB_ITEM("TCPFastOpenActive", LINUX_MIB_TCPFASTOPENACTIVE),
+	SNMP_MIB_ITEM("TCPFastOpenActiveFail", LINUX_MIB_TCPFASTOPENACTIVEFAIL),
+	SNMP_MIB_ITEM("TCPFastOpenPassive", LINUX_MIB_TCPFASTOPENPASSIVE),
+	SNMP_MIB_ITEM("TCPFastOpenPassiveFail", LINUX_MIB_TCPFASTOPENPASSIVEFAIL),
+	SNMP_MIB_ITEM("TCPFastOpenListenOverflow", LINUX_MIB_TCPFASTOPENLISTENOVERFLOW),
+	SNMP_MIB_ITEM("TCPFastOpenCookieReqd", LINUX_MIB_TCPFASTOPENCOOKIEREQD),
+	SNMP_MIB_ITEM("TCPFastOpenBlackhole", LINUX_MIB_TCPFASTOPENBLACKHOLE),
+	SNMP_MIB_ITEM("TCPSpuriousRtxHostQueues", LINUX_MIB_TCPSPURIOUS_RTX_HOSTQUEUES),
+	SNMP_MIB_ITEM("BusyPollRxPackets", LINUX_MIB_BUSYPOLLRXPACKETS),
+	SNMP_MIB_ITEM("TCPAutoCorking", LINUX_MIB_TCPAUTOCORKING),
+	SNMP_MIB_ITEM("TCPFromZeroWindowAdv", LINUX_MIB_TCPFROMZEROWINDOWADV),
+	SNMP_MIB_ITEM("TCPToZeroWindowAdv", LINUX_MIB_TCPTOZEROWINDOWADV),
+	SNMP_MIB_ITEM("TCPWantZeroWindowAdv", LINUX_MIB_TCPWANTZEROWINDOWADV),
+	SNMP_MIB_ITEM("TCPSynRetrans", LINUX_MIB_TCPSYNRETRANS),
+	SNMP_MIB_ITEM("TCPOrigDataSent", LINUX_MIB_TCPORIGDATASENT),
+	SNMP_MIB_ITEM("TCPHystartTrainDetect", LINUX_MIB_TCPHYSTARTTRAINDETECT),
+	SNMP_MIB_ITEM("TCPHystartTrainCwnd", LINUX_MIB_TCPHYSTARTTRAINCWND),
+	SNMP_MIB_ITEM("TCPHystartDelayDetect", LINUX_MIB_TCPHYSTARTDELAYDETECT),
+	SNMP_MIB_ITEM("TCPHystartDelayCwnd", LINUX_MIB_TCPHYSTARTDELAYCWND),
+	SNMP_MIB_ITEM("TCPACKSkippedSynRecv", LINUX_MIB_TCPACKSKIPPEDSYNRECV),
+	SNMP_MIB_ITEM("TCPACKSkippedPAWS", LINUX_MIB_TCPACKSKIPPEDPAWS),
+	SNMP_MIB_ITEM("TCPACKSkippedSeq", LINUX_MIB_TCPACKSKIPPEDSEQ),
+	SNMP_MIB_ITEM("TCPACKSkippedFinWait2", LINUX_MIB_TCPACKSKIPPEDFINWAIT2),
+	SNMP_MIB_ITEM("TCPACKSkippedTimeWait", LINUX_MIB_TCPACKSKIPPEDTIMEWAIT),
+	SNMP_MIB_ITEM("TCPACKSkippedChallenge", LINUX_MIB_TCPACKSKIPPEDCHALLENGE),
+	SNMP_MIB_ITEM("TCPWinProbe", LINUX_MIB_TCPWINPROBE),
+	SNMP_MIB_ITEM("TCPKeepAlive", LINUX_MIB_TCPKEEPALIVE),
+	SNMP_MIB_ITEM("TCPMTUPFail", LINUX_MIB_TCPMTUPFAIL),
+	SNMP_MIB_ITEM("TCPMTUPSuccess", LINUX_MIB_TCPMTUPSUCCESS),
+	SNMP_MIB_ITEM("TCPDelivered", LINUX_MIB_TCPDELIVERED),
+	SNMP_MIB_ITEM("TCPDeliveredCE", LINUX_MIB_TCPDELIVEREDCE),
+	SNMP_MIB_ITEM("TCPAckCompressed", LINUX_MIB_TCPACKCOMPRESSED),
+	SNMP_MIB_ITEM("TCPZeroWindowDrop", LINUX_MIB_TCPZEROWINDOWDROP),
+	SNMP_MIB_ITEM("TCPRcvQDrop", LINUX_MIB_TCPRCVQDROP),
+	SNMP_MIB_ITEM("TCPWqueueTooBig", LINUX_MIB_TCPWQUEUETOOBIG),
+	SNMP_MIB_ITEM("TCPFastOpenPassiveAltKey", LINUX_MIB_TCPFASTOPENPASSIVEALTKEY),
+	SNMP_MIB_ITEM("TcpTimeoutRehash", LINUX_MIB_TCPTIMEOUTREHASH),
+	SNMP_MIB_ITEM("TcpDuplicateDataRehash", LINUX_MIB_TCPDUPLICATEDATAREHASH),
+	SNMP_MIB_ITEM("TCPDSACKRecvSegs", LINUX_MIB_TCPDSACKRECVSEGS),
+	SNMP_MIB_ITEM("TCPDSACKIgnoredDubious", LINUX_MIB_TCPDSACKIGNOREDDUBIOUS),
+	SNMP_MIB_ITEM("TCPMigrateReqSuccess", LINUX_MIB_TCPMIGRATEREQSUCCESS),
+	SNMP_MIB_ITEM("TCPMigrateReqFailure", LINUX_MIB_TCPMIGRATEREQFAILURE),
+	SNMP_MIB_ITEM("TCPPLBRehash", LINUX_MIB_TCPPLBREHASH),
+	SNMP_MIB_ITEM("TCPAORequired", LINUX_MIB_TCPAOREQUIRED),
+	SNMP_MIB_ITEM("TCPAOBad", LINUX_MIB_TCPAOBAD),
+	SNMP_MIB_ITEM("TCPAOKeyNotFound", LINUX_MIB_TCPAOKEYNOTFOUND),
+	SNMP_MIB_ITEM("TCPAOGood", LINUX_MIB_TCPAOGOOD),
+	SNMP_MIB_ITEM("TCPAODroppedIcmps", LINUX_MIB_TCPAODROPPEDICMPS),
+};
+
+static void icmpmsg_put_line(struct seq_file *seq, unsigned long *vals,
+			     unsigned short *type, int count)
+{
+	int j;
+
+	if (count) {
+		seq_puts(seq, "\nIcmpMsg:");
+		for (j = 0; j < count; ++j)
+			seq_printf(seq, " %sType%u",
+				type[j] & 0x100 ? "Out" : "In",
+				type[j] & 0xff);
+		seq_puts(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 = atomic_long_read(&net->mib.icmpmsg_statistics->mibs[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;
+	atomic_long_t *ptr = net->mib.icmpmsg_statistics->mibs;
+
+	seq_puts(seq, "\nIcmp: InMsgs InErrors InCsumErrors");
+	for (i = 0; icmpmibmap[i].name; i++)
+		seq_printf(seq, " In%s", icmpmibmap[i].name);
+	seq_puts(seq, " OutMsgs OutErrors OutRateLimitGlobal OutRateLimitHost");
+	for (i = 0; icmpmibmap[i].name; i++)
+		seq_printf(seq, " Out%s", icmpmibmap[i].name);
+	seq_printf(seq, "\nIcmp: %lu %lu %lu",
+		snmp_fold_field(net->mib.icmp_statistics, ICMP_MIB_INMSGS),
+		snmp_fold_field(net->mib.icmp_statistics, ICMP_MIB_INERRORS),
+		snmp_fold_field(net->mib.icmp_statistics, ICMP_MIB_CSUMERRORS));
+	for (i = 0; icmpmibmap[i].name; i++)
+		seq_printf(seq, " %lu",
+			   atomic_long_read(ptr + icmpmibmap[i].index));
+	seq_printf(seq, " %lu %lu %lu %lu",
+		snmp_fold_field(net->mib.icmp_statistics, ICMP_MIB_OUTMSGS),
+		snmp_fold_field(net->mib.icmp_statistics, ICMP_MIB_OUTERRORS),
+		snmp_fold_field(net->mib.icmp_statistics, ICMP_MIB_RATELIMITGLOBAL),
+		snmp_fold_field(net->mib.icmp_statistics, ICMP_MIB_RATELIMITHOST));
+	for (i = 0; icmpmibmap[i].name; i++)
+		seq_printf(seq, " %lu",
+			   atomic_long_read(ptr + (icmpmibmap[i].index | 0x100)));
+}
+
+/*
+ *	Called from the PROCfs module. This outputs /proc/net/snmp.
+ */
+static int snmp_seq_show_ipstats(struct seq_file *seq, void *v)
+{
+	const int cnt = ARRAY_SIZE(snmp4_ipstats_list);
+	u64 buff64[ARRAY_SIZE(snmp4_ipstats_list)];
+	struct net *net = seq->private;
+	int i;
+
+	memset(buff64, 0, sizeof(buff64));
+
+	seq_puts(seq, "Ip: Forwarding DefaultTTL");
+	for (i = 0; i < cnt; i++)
+		seq_printf(seq, " %s", snmp4_ipstats_list[i].name);
+
+	seq_printf(seq, "\nIp: %d %d",
+		   IPV4_DEVCONF_ALL_RO(net, FORWARDING) ? 1 : 2,
+		   READ_ONCE(net->ipv4.sysctl_ip_default_ttl));
+
+	BUILD_BUG_ON(offsetof(struct ipstats_mib, mibs) != 0);
+	snmp_get_cpu_field64_batch_cnt(buff64, snmp4_ipstats_list, cnt,
+				       net->mib.ip_statistics,
+				       offsetof(struct ipstats_mib, syncp));
+	for (i = 0; i < cnt; i++)
+		seq_printf(seq, " %llu", buff64[i]);
+
+	return 0;
+}
+
+static int snmp_seq_show_tcp_udp(struct seq_file *seq, void *v)
+{
+	const int udp_cnt = ARRAY_SIZE(snmp4_udp_list);
+	const int tcp_cnt = ARRAY_SIZE(snmp4_tcp_list);
+	unsigned long buff[TCPUDP_MIB_MAX];
+	struct net *net = seq->private;
+	int i;
+
+	memset(buff, 0, tcp_cnt * sizeof(unsigned long));
+
+	seq_puts(seq, "\nTcp:");
+	for (i = 0; i < tcp_cnt; i++)
+		seq_printf(seq, " %s", snmp4_tcp_list[i].name);
+
+	seq_puts(seq, "\nTcp:");
+	snmp_get_cpu_field_batch_cnt(buff, snmp4_tcp_list,
+				     tcp_cnt,
+				     net->mib.tcp_statistics);
+	for (i = 0; i < tcp_cnt; i++) {
+		/* MaxConn field is signed, RFC 2012 */
+		if (snmp4_tcp_list[i].entry == TCP_MIB_MAXCONN)
+			seq_printf(seq, " %ld", buff[i]);
+		else
+			seq_printf(seq, " %lu", buff[i]);
+	}
+
+	memset(buff, 0, udp_cnt * sizeof(unsigned long));
+
+	snmp_get_cpu_field_batch_cnt(buff, snmp4_udp_list,
+				     udp_cnt,
+				     net->mib.udp_statistics);
+	seq_puts(seq, "\nUdp:");
+	for (i = 0; i < udp_cnt; i++)
+		seq_printf(seq, " %s", snmp4_udp_list[i].name);
+	seq_puts(seq, "\nUdp:");
+	for (i = 0; i < udp_cnt; i++)
+		seq_printf(seq, " %lu", buff[i]);
+
+	seq_putc(seq, '\n');
+	return 0;
+}
+
+static int snmp_seq_show(struct seq_file *seq, void *v)
+{
+	snmp_seq_show_ipstats(seq, v);
+
+	icmp_put(seq);	/* RFC 2011 compatibility */
+	icmpmsg_put(seq);
+
+	snmp_seq_show_tcp_udp(seq, v);
+
+	return 0;
+}
+
+/*
+ *	Output /proc/net/netstat
+ */
+static int netstat_seq_show(struct seq_file *seq, void *v)
+{
+	const int ip_cnt = ARRAY_SIZE(snmp4_ipextstats_list);
+	const int tcp_cnt = ARRAY_SIZE(snmp4_net_list);
+	struct net *net = seq->private;
+	unsigned long *buff;
+	int i;
+
+	seq_puts(seq, "TcpExt:");
+	for (i = 0; i < tcp_cnt; i++)
+		seq_printf(seq, " %s", snmp4_net_list[i].name);
+
+	seq_puts(seq, "\nTcpExt:");
+	buff = kzalloc(max(tcp_cnt * sizeof(long), ip_cnt * sizeof(u64)),
+		       GFP_KERNEL);
+	if (buff) {
+		snmp_get_cpu_field_batch_cnt(buff, snmp4_net_list, tcp_cnt,
+					     net->mib.net_statistics);
+		for (i = 0; i < tcp_cnt; i++)
+			seq_printf(seq, " %lu", buff[i]);
+	} else {
+		for (i = 0; i < tcp_cnt; i++)
+			seq_printf(seq, " %lu",
+				   snmp_fold_field(net->mib.net_statistics,
+						   snmp4_net_list[i].entry));
+	}
+	seq_puts(seq, "\nIpExt:");
+	for (i = 0; i < ip_cnt; i++)
+		seq_printf(seq, " %s", snmp4_ipextstats_list[i].name);
+
+	seq_puts(seq, "\nIpExt:");
+	if (buff) {
+		u64 *buff64 = (u64 *)buff;
+
+		memset(buff64, 0, ip_cnt * sizeof(u64));
+		snmp_get_cpu_field64_batch_cnt(buff64, snmp4_ipextstats_list, ip_cnt,
+					   net->mib.ip_statistics,
+					   offsetof(struct ipstats_mib, syncp));
+		for (i = 0; i < ip_cnt; i++)
+			seq_printf(seq, " %llu", buff64[i]);
+	} else {
+		for (i = 0; i < ip_cnt; i++)
+			seq_printf(seq, " %llu",
+				   snmp_fold_field64(net->mib.ip_statistics,
+						     snmp4_ipextstats_list[i].entry,
+						     offsetof(struct ipstats_mib, syncp)));
+	}
+	kfree(buff);
+	seq_putc(seq, '\n');
+	mptcp_seq_show(seq);
+	return 0;
+}
+
+static __net_init int ip_proc_init_net(struct net *net)
+{
+	if (!proc_create_net_single("sockstat", 0444, net->proc_net,
+			sockstat_seq_show, NULL))
+		goto out_sockstat;
+	if (!proc_create_net_single("netstat", 0444, net->proc_net,
+			netstat_seq_show, NULL))
+		goto out_netstat;
+	if (!proc_create_net_single("snmp", 0444, net->proc_net, snmp_seq_show,
+			NULL))
+		goto out_snmp;
+
+	return 0;
+
+out_snmp:
+	remove_proc_entry("netstat", net->proc_net);
+out_netstat:
+	remove_proc_entry("sockstat", net->proc_net);
+out_sockstat:
+	return -ENOMEM;
+}
+
+static __net_exit void ip_proc_exit_net(struct net *net)
+{
+	remove_proc_entry("snmp", net->proc_net);
+	remove_proc_entry("netstat", net->proc_net);
+	remove_proc_entry("sockstat", net->proc_net);
+}
+
+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);
+}