Merge tag 'net-next-6.3' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-nextgrafted

Pull networking updates from Jakub Kicinski:
 "Core:

   - Add dedicated kmem_cache for typical/small skb->head, avoid having
     to access struct page at kfree time, and improve memory use.

   - Introduce sysctl to set default RPS configuration for new netdevs.

   - Define Netlink protocol specification format which can be used to
     describe messages used by each family and auto-generate parsers.
     Add tools for generating kernel data structures and uAPI headers.

   - Expose all net/core sysctls inside netns.

   - Remove 4s sleep in netpoll if carrier is instantly detected on
     boot.

   - Add configurable limit of MDB entries per port, and port-vlan.

   - Continue populating drop reasons throughout the stack.

   - Retire a handful of legacy Qdiscs and classifiers.

  Protocols:

   - Support IPv4 big TCP (TSO frames larger than 64kB).

   - Add IP_LOCAL_PORT_RANGE socket option, to control local port range
     on socket by socket basis.

   - Track and report in procfs number of MPTCP sockets used.

   - Support mixing IPv4 and IPv6 flows in the in-kernel MPTCP path
     manager.

   - IPv6: don't check net.ipv6.route.max_size and rely on garbage
     collection to free memory (similarly to IPv4).

   - Support Penultimate Segment Pop (PSP) flavor in SRv6 (RFC8986).

   - ICMP: add per-rate limit counters.

   - Add support for user scanning requests in ieee802154.

   - Remove static WEP support.

   - Support minimal Wi-Fi 7 Extremely High Throughput (EHT) rate
     reporting.

   - WiFi 7 EHT channel puncturing support (client & AP).

  BPF:

   - Add a rbtree data structure following the "next-gen data structure"
     precedent set by recently added linked list, that is, by using
     kfunc + kptr instead of adding a new BPF map type.

   - Expose XDP hints via kfuncs with initial support for RX hash and
     timestamp metadata.

   - Add BPF_F_NO_TUNNEL_KEY extension to bpf_skb_set_tunnel_key to
     better support decap on GRE tunnel devices not operating in collect
     metadata.

   - Improve x86 JIT's codegen for PROBE_MEM runtime error checks.

   - Remove the need for trace_printk_lock for bpf_trace_printk and
     bpf_trace_vprintk helpers.

   - Extend libbpf's bpf_tracing.h support for tracing arguments of
     kprobes/uprobes and syscall as a special case.

   - Significantly reduce the search time for module symbols by
     livepatch and BPF.

   - Enable cpumasks to be used as kptrs, which is useful for tracing
     programs tracking which tasks end up running on which CPUs in
     different time intervals.

   - Add support for BPF trampoline on s390x and riscv64.

   - Add capability to export the XDP features supported by the NIC.

   - Add __bpf_kfunc tag for marking kernel functions as kfuncs.

   - Add cgroup.memory=nobpf kernel parameter option to disable BPF
     memory accounting for container environments.

  Netfilter:

   - Remove the CLUSTERIP target. It has been marked as obsolete for
     years, and we still have WARN splats wrt races of the out-of-band
     /proc interface installed by this target.

   - Add 'destroy' commands to nf_tables. They are identical to the
     existing 'delete' commands, but do not return an error if the
     referenced object (set, chain, rule...) did not exist.

  Driver API:

   - Improve cpumask_local_spread() locality to help NICs set the right
     IRQ affinity on AMD platforms.

   - Separate C22 and C45 MDIO bus transactions more clearly.

   - Introduce new DCB table to control DSCP rewrite on egress.

   - Support configuration of Physical Layer Collision Avoidance (PLCA)
     Reconciliation Sublayer (RS) (802.3cg-2019). Modern version of
     shared medium Ethernet.

   - Support for MAC Merge layer (IEEE 802.3-2018 clause 99). Allowing
     preemption of low priority frames by high priority frames.

   - Add support for controlling MACSec offload using netlink SET.

   - Rework devlink instance refcounts to allow registration and
     de-registration under the instance lock. Split the code into
     multiple files, drop some of the unnecessarily granular locks and
     factor out common parts of netlink operation handling.

   - Add TX frame aggregation parameters (for USB drivers).

   - Add a new attr TCA_EXT_WARN_MSG to report TC (offload) warning
     messages with notifications for debug.

   - Allow offloading of UDP NEW connections via act_ct.

   - Add support for per action HW stats in TC.

   - Support hardware miss to TC action (continue processing in SW from
     a specific point in the action chain).

   - Warn if old Wireless Extension user space interface is used with
     modern cfg80211/mac80211 drivers. Do not support Wireless
     Extensions for Wi-Fi 7 devices at all. Everyone should switch to
     using nl80211 interface instead.

   - Improve the CAN bit timing configuration. Use extack to return
     error messages directly to user space, update the SJW handling,
     including the definition of a new default value that will benefit
     CAN-FD controllers, by increasing their oscillator tolerance.

  New hardware / drivers:

   - Ethernet:
      - nVidia BlueField-3 support (control traffic driver)
      - Ethernet support for imx93 SoCs
      - Motorcomm yt8531 gigabit Ethernet PHY
      - onsemi NCN26000 10BASE-T1S PHY (with support for PLCA)
      - Microchip LAN8841 PHY (incl. cable diagnostics and PTP)
      - Amlogic gxl MDIO mux

   - WiFi:
      - RealTek RTL8188EU (rtl8xxxu)
      - Qualcomm Wi-Fi 7 devices (ath12k)

   - CAN:
      - Renesas R-Car V4H

  Drivers:

   - Bluetooth:
      - Set Per Platform Antenna Gain (PPAG) for Intel controllers.

   - Ethernet NICs:
      - Intel (1G, igc):
         - support TSN / Qbv / packet scheduling features of i226 model
      - Intel (100G, ice):
         - use GNSS subsystem instead of TTY
         - multi-buffer XDP support
         - extend support for GPIO pins to E823 devices
      - nVidia/Mellanox:
         - update the shared buffer configuration on PFC commands
         - implement PTP adjphase function for HW offset control
         - TC support for Geneve and GRE with VF tunnel offload
         - more efficient crypto key management method
         - multi-port eswitch support
      - Netronome/Corigine:
         - add DCB IEEE support
         - support IPsec offloading for NFP3800
      - Freescale/NXP (enetc):
         - support XDP_REDIRECT for XDP non-linear buffers
         - improve reconfig, avoid link flap and waiting for idle
         - support MAC Merge layer
      - Other NICs:
         - sfc/ef100: add basic devlink support for ef100
         - ionic: rx_push mode operation (writing descriptors via MMIO)
         - bnxt: use the auxiliary bus abstraction for RDMA
         - r8169: disable ASPM and reset bus in case of tx timeout
         - cpsw: support QSGMII mode for J721e CPSW9G
         - cpts: support pulse-per-second output
         - ngbe: add an mdio bus driver
         - usbnet: optimize usbnet_bh() by avoiding unnecessary queuing
         - r8152: handle devices with FW with NCM support
         - amd-xgbe: support 10Mbps, 2.5GbE speeds and rx-adaptation
         - virtio-net: support multi buffer XDP
         - virtio/vsock: replace virtio_vsock_pkt with sk_buff
         - tsnep: XDP support

   - Ethernet high-speed switches:
      - nVidia/Mellanox (mlxsw):
         - add support for latency TLV (in FW control messages)
      - Microchip (sparx5):
         - separate explicit and implicit traffic forwarding rules, make
           the implicit rules always active
         - add support for egress DSCP rewrite
         - IS0 VCAP support (Ingress Classification)
         - IS2 VCAP filters (protos, L3 addrs, L4 ports, flags, ToS
           etc.)
         - ES2 VCAP support (Egress Access Control)
         - support for Per-Stream Filtering and Policing (802.1Q,
           8.6.5.1)

   - Ethernet embedded switches:
      - Marvell (mv88e6xxx):
         - add MAB (port auth) offload support
         - enable PTP receive for mv88e6390
      - NXP (ocelot):
         - support MAC Merge layer
         - support for the the vsc7512 internal copper phys
      - Microchip:
         - lan9303: convert to PHYLINK
         - lan966x: support TC flower filter statistics
         - lan937x: PTP support for KSZ9563/KSZ8563 and LAN937x
         - lan937x: support Credit Based Shaper configuration
         - ksz9477: support Energy Efficient Ethernet
      - other:
         - qca8k: convert to regmap read/write API, use bulk operations
         - rswitch: Improve TX timestamp accuracy

   - Intel WiFi (iwlwifi):
      - EHT (Wi-Fi 7) rate reporting
      - STEP equalizer support: transfer some STEP (connection to radio
        on platforms with integrated wifi) related parameters from the
        BIOS to the firmware.

   - Qualcomm 802.11ax WiFi (ath11k):
      - IPQ5018 support
      - Fine Timing Measurement (FTM) responder role support
      - channel 177 support

   - MediaTek WiFi (mt76):
      - per-PHY LED support
      - mt7996: EHT (Wi-Fi 7) support
      - Wireless Ethernet Dispatch (WED) reset support
      - switch to using page pool allocator

   - RealTek WiFi (rtw89):
      - support new version of Bluetooth co-existance

   - Mobile:
      - rmnet: support TX aggregation"

* tag 'net-next-6.3' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next: (1872 commits)
  page_pool: add a comment explaining the fragment counter usage
  net: ethtool: fix __ethtool_dev_mm_supported() implementation
  ethtool: pse-pd: Fix double word in comments
  xsk: add linux/vmalloc.h to xsk.c
  sefltests: netdevsim: wait for devlink instance after netns removal
  selftest: fib_tests: Always cleanup before exit
  net/mlx5e: Align IPsec ASO result memory to be as required by hardware
  net/mlx5e: TC, Set CT miss to the specific ct action instance
  net/mlx5e: Rename CHAIN_TO_REG to MAPPED_OBJ_TO_REG
  net/mlx5: Refactor tc miss handling to a single function
  net/mlx5: Kconfig: Make tc offload depend on tc skb extension
  net/sched: flower: Support hardware miss to tc action
  net/sched: flower: Move filter handle initialization earlier
  net/sched: cls_api: Support hardware miss to tc action
  net/sched: Rename user cookie and act cookie
  sfc: fix builds without CONFIG_RTC_LIB
  sfc: clean up some inconsistent indentings
  net/mlx4_en: Introduce flexible array to silence overflow warning
  net: lan966x: Fix possible deadlock inside PTP
  net/ulp: Remove redundant ->clone() test in inet_clone_ulp().
  ...

1 files changed, 501 insertions, 0 deletions

diff --git a/net/rxrpc/proc.c b/net/rxrpc/proc.c
new file mode 100644
index 000000000..682636d3b
--- /dev/null
+++ b/net/rxrpc/proc.c
@@ -0,0 +1,501 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/* /proc/net/ support for AF_RXRPC
+ *
+ * Copyright (C) 2007 Red Hat, Inc. All Rights Reserved.
+ * Written by David Howells (dhowells@redhat.com)
+ */
+
+#include <linux/module.h>
+#include <net/sock.h>
+#include <net/af_rxrpc.h>
+#include "ar-internal.h"
+
+static const char *const rxrpc_conn_states[RXRPC_CONN__NR_STATES] = {
+	[RXRPC_CONN_UNUSED]			= "Unused  ",
+	[RXRPC_CONN_CLIENT_UNSECURED]		= "ClUnsec ",
+	[RXRPC_CONN_CLIENT]			= "Client  ",
+	[RXRPC_CONN_SERVICE_PREALLOC]		= "SvPrealc",
+	[RXRPC_CONN_SERVICE_UNSECURED]		= "SvUnsec ",
+	[RXRPC_CONN_SERVICE_CHALLENGING]	= "SvChall ",
+	[RXRPC_CONN_SERVICE]			= "SvSecure",
+	[RXRPC_CONN_ABORTED]			= "Aborted ",
+};
+
+/*
+ * generate a list of extant and dead calls in /proc/net/rxrpc_calls
+ */
+static void *rxrpc_call_seq_start(struct seq_file *seq, loff_t *_pos)
+	__acquires(rcu)
+{
+	struct rxrpc_net *rxnet = rxrpc_net(seq_file_net(seq));
+
+	rcu_read_lock();
+	return seq_list_start_head_rcu(&rxnet->calls, *_pos);
+}
+
+static void *rxrpc_call_seq_next(struct seq_file *seq, void *v, loff_t *pos)
+{
+	struct rxrpc_net *rxnet = rxrpc_net(seq_file_net(seq));
+
+	return seq_list_next_rcu(v, &rxnet->calls, pos);
+}
+
+static void rxrpc_call_seq_stop(struct seq_file *seq, void *v)
+	__releases(rcu)
+{
+	rcu_read_unlock();
+}
+
+static int rxrpc_call_seq_show(struct seq_file *seq, void *v)
+{
+	struct rxrpc_local *local;
+	struct rxrpc_call *call;
+	struct rxrpc_net *rxnet = rxrpc_net(seq_file_net(seq));
+	enum rxrpc_call_state state;
+	unsigned long timeout = 0;
+	rxrpc_seq_t acks_hard_ack;
+	char lbuff[50], rbuff[50];
+
+	if (v == &rxnet->calls) {
+		seq_puts(seq,
+			 "Proto Local                                          "
+			 " Remote                                         "
+			 " SvID ConnID   CallID   End Use State    Abort   "
+			 " DebugId  TxSeq    TW RxSeq    RW RxSerial CW RxTimo\n");
+		return 0;
+	}
+
+	call = list_entry(v, struct rxrpc_call, link);
+
+	local = call->local;
+	if (local)
+		sprintf(lbuff, "%pISpc", &local->srx.transport);
+	else
+		strcpy(lbuff, "no_local");
+
+	sprintf(rbuff, "%pISpc", &call->dest_srx.transport);
+
+	state = rxrpc_call_state(call);
+	if (state != RXRPC_CALL_SERVER_PREALLOC) {
+		timeout = READ_ONCE(call->expect_rx_by);
+		timeout -= jiffies;
+	}
+
+	acks_hard_ack = READ_ONCE(call->acks_hard_ack);
+	seq_printf(seq,
+		   "UDP   %-47.47s %-47.47s %4x %08x %08x %s %3u"
+		   " %-8.8s %08x %08x %08x %02x %08x %02x %08x %02x %06lx\n",
+		   lbuff,
+		   rbuff,
+		   call->dest_srx.srx_service,
+		   call->cid,
+		   call->call_id,
+		   rxrpc_is_service_call(call) ? "Svc" : "Clt",
+		   refcount_read(&call->ref),
+		   rxrpc_call_states[state],
+		   call->abort_code,
+		   call->debug_id,
+		   acks_hard_ack, READ_ONCE(call->tx_top) - acks_hard_ack,
+		   call->ackr_window, call->ackr_wtop - call->ackr_window,
+		   call->rx_serial,
+		   call->cong_cwnd,
+		   timeout);
+
+	return 0;
+}
+
+const struct seq_operations rxrpc_call_seq_ops = {
+	.start  = rxrpc_call_seq_start,
+	.next   = rxrpc_call_seq_next,
+	.stop   = rxrpc_call_seq_stop,
+	.show   = rxrpc_call_seq_show,
+};
+
+/*
+ * generate a list of extant virtual connections in /proc/net/rxrpc_conns
+ */
+static void *rxrpc_connection_seq_start(struct seq_file *seq, loff_t *_pos)
+	__acquires(rxnet->conn_lock)
+{
+	struct rxrpc_net *rxnet = rxrpc_net(seq_file_net(seq));
+
+	read_lock(&rxnet->conn_lock);
+	return seq_list_start_head(&rxnet->conn_proc_list, *_pos);
+}
+
+static void *rxrpc_connection_seq_next(struct seq_file *seq, void *v,
+				       loff_t *pos)
+{
+	struct rxrpc_net *rxnet = rxrpc_net(seq_file_net(seq));
+
+	return seq_list_next(v, &rxnet->conn_proc_list, pos);
+}
+
+static void rxrpc_connection_seq_stop(struct seq_file *seq, void *v)
+	__releases(rxnet->conn_lock)
+{
+	struct rxrpc_net *rxnet = rxrpc_net(seq_file_net(seq));
+
+	read_unlock(&rxnet->conn_lock);
+}
+
+static int rxrpc_connection_seq_show(struct seq_file *seq, void *v)
+{
+	struct rxrpc_connection *conn;
+	struct rxrpc_net *rxnet = rxrpc_net(seq_file_net(seq));
+	const char *state;
+	char lbuff[50], rbuff[50];
+
+	if (v == &rxnet->conn_proc_list) {
+		seq_puts(seq,
+			 "Proto Local                                          "
+			 " Remote                                         "
+			 " SvID ConnID   End Ref Act State    Key     "
+			 " Serial   ISerial  CallId0  CallId1  CallId2  CallId3\n"
+			 );
+		return 0;
+	}
+
+	conn = list_entry(v, struct rxrpc_connection, proc_link);
+	if (conn->state == RXRPC_CONN_SERVICE_PREALLOC) {
+		strcpy(lbuff, "no_local");
+		strcpy(rbuff, "no_connection");
+		goto print;
+	}
+
+	sprintf(lbuff, "%pISpc", &conn->local->srx.transport);
+	sprintf(rbuff, "%pISpc", &conn->peer->srx.transport);
+print:
+	state = rxrpc_is_conn_aborted(conn) ?
+		rxrpc_call_completions[conn->completion] :
+		rxrpc_conn_states[conn->state];
+	seq_printf(seq,
+		   "UDP   %-47.47s %-47.47s %4x %08x %s %3u %3d"
+		   " %s %08x %08x %08x %08x %08x %08x %08x\n",
+		   lbuff,
+		   rbuff,
+		   conn->service_id,
+		   conn->proto.cid,
+		   rxrpc_conn_is_service(conn) ? "Svc" : "Clt",
+		   refcount_read(&conn->ref),
+		   atomic_read(&conn->active),
+		   state,
+		   key_serial(conn->key),
+		   atomic_read(&conn->serial),
+		   conn->hi_serial,
+		   conn->channels[0].call_id,
+		   conn->channels[1].call_id,
+		   conn->channels[2].call_id,
+		   conn->channels[3].call_id);
+
+	return 0;
+}
+
+const struct seq_operations rxrpc_connection_seq_ops = {
+	.start  = rxrpc_connection_seq_start,
+	.next   = rxrpc_connection_seq_next,
+	.stop   = rxrpc_connection_seq_stop,
+	.show   = rxrpc_connection_seq_show,
+};
+
+/*
+ * generate a list of extant virtual peers in /proc/net/rxrpc/peers
+ */
+static int rxrpc_peer_seq_show(struct seq_file *seq, void *v)
+{
+	struct rxrpc_peer *peer;
+	time64_t now;
+	char lbuff[50], rbuff[50];
+
+	if (v == SEQ_START_TOKEN) {
+		seq_puts(seq,
+			 "Proto Local                                          "
+			 " Remote                                         "
+			 " Use SST   MTU LastUse      RTT      RTO\n"
+			 );
+		return 0;
+	}
+
+	peer = list_entry(v, struct rxrpc_peer, hash_link);
+
+	sprintf(lbuff, "%pISpc", &peer->local->srx.transport);
+
+	sprintf(rbuff, "%pISpc", &peer->srx.transport);
+
+	now = ktime_get_seconds();
+	seq_printf(seq,
+		   "UDP   %-47.47s %-47.47s %3u"
+		   " %3u %5u %6llus %8u %8u\n",
+		   lbuff,
+		   rbuff,
+		   refcount_read(&peer->ref),
+		   peer->cong_ssthresh,
+		   peer->mtu,
+		   now - peer->last_tx_at,
+		   peer->srtt_us >> 3,
+		   jiffies_to_usecs(peer->rto_j));
+
+	return 0;
+}
+
+static void *rxrpc_peer_seq_start(struct seq_file *seq, loff_t *_pos)
+	__acquires(rcu)
+{
+	struct rxrpc_net *rxnet = rxrpc_net(seq_file_net(seq));
+	unsigned int bucket, n;
+	unsigned int shift = 32 - HASH_BITS(rxnet->peer_hash);
+	void *p;
+
+	rcu_read_lock();
+
+	if (*_pos >= UINT_MAX)
+		return NULL;
+
+	n = *_pos & ((1U << shift) - 1);
+	bucket = *_pos >> shift;
+	for (;;) {
+		if (bucket >= HASH_SIZE(rxnet->peer_hash)) {
+			*_pos = UINT_MAX;
+			return NULL;
+		}
+		if (n == 0) {
+			if (bucket == 0)
+				return SEQ_START_TOKEN;
+			*_pos += 1;
+			n++;
+		}
+
+		p = seq_hlist_start_rcu(&rxnet->peer_hash[bucket], n - 1);
+		if (p)
+			return p;
+		bucket++;
+		n = 1;
+		*_pos = (bucket << shift) | n;
+	}
+}
+
+static void *rxrpc_peer_seq_next(struct seq_file *seq, void *v, loff_t *_pos)
+{
+	struct rxrpc_net *rxnet = rxrpc_net(seq_file_net(seq));
+	unsigned int bucket, n;
+	unsigned int shift = 32 - HASH_BITS(rxnet->peer_hash);
+	void *p;
+
+	if (*_pos >= UINT_MAX)
+		return NULL;
+
+	bucket = *_pos >> shift;
+
+	p = seq_hlist_next_rcu(v, &rxnet->peer_hash[bucket], _pos);
+	if (p)
+		return p;
+
+	for (;;) {
+		bucket++;
+		n = 1;
+		*_pos = (bucket << shift) | n;
+
+		if (bucket >= HASH_SIZE(rxnet->peer_hash)) {
+			*_pos = UINT_MAX;
+			return NULL;
+		}
+		if (n == 0) {
+			*_pos += 1;
+			n++;
+		}
+
+		p = seq_hlist_start_rcu(&rxnet->peer_hash[bucket], n - 1);
+		if (p)
+			return p;
+	}
+}
+
+static void rxrpc_peer_seq_stop(struct seq_file *seq, void *v)
+	__releases(rcu)
+{
+	rcu_read_unlock();
+}
+
+
+const struct seq_operations rxrpc_peer_seq_ops = {
+	.start  = rxrpc_peer_seq_start,
+	.next   = rxrpc_peer_seq_next,
+	.stop   = rxrpc_peer_seq_stop,
+	.show   = rxrpc_peer_seq_show,
+};
+
+/*
+ * Generate a list of extant virtual local endpoints in /proc/net/rxrpc/locals
+ */
+static int rxrpc_local_seq_show(struct seq_file *seq, void *v)
+{
+	struct rxrpc_local *local;
+	char lbuff[50];
+
+	if (v == SEQ_START_TOKEN) {
+		seq_puts(seq,
+			 "Proto Local                                          "
+			 " Use Act RxQ\n");
+		return 0;
+	}
+
+	local = hlist_entry(v, struct rxrpc_local, link);
+
+	sprintf(lbuff, "%pISpc", &local->srx.transport);
+
+	seq_printf(seq,
+		   "UDP   %-47.47s %3u %3u %3u\n",
+		   lbuff,
+		   refcount_read(&local->ref),
+		   atomic_read(&local->active_users),
+		   local->rx_queue.qlen);
+
+	return 0;
+}
+
+static void *rxrpc_local_seq_start(struct seq_file *seq, loff_t *_pos)
+	__acquires(rcu)
+{
+	struct rxrpc_net *rxnet = rxrpc_net(seq_file_net(seq));
+	unsigned int n;
+
+	rcu_read_lock();
+
+	if (*_pos >= UINT_MAX)
+		return NULL;
+
+	n = *_pos;
+	if (n == 0)
+		return SEQ_START_TOKEN;
+
+	return seq_hlist_start_rcu(&rxnet->local_endpoints, n - 1);
+}
+
+static void *rxrpc_local_seq_next(struct seq_file *seq, void *v, loff_t *_pos)
+{
+	struct rxrpc_net *rxnet = rxrpc_net(seq_file_net(seq));
+
+	if (*_pos >= UINT_MAX)
+		return NULL;
+
+	return seq_hlist_next_rcu(v, &rxnet->local_endpoints, _pos);
+}
+
+static void rxrpc_local_seq_stop(struct seq_file *seq, void *v)
+	__releases(rcu)
+{
+	rcu_read_unlock();
+}
+
+const struct seq_operations rxrpc_local_seq_ops = {
+	.start  = rxrpc_local_seq_start,
+	.next   = rxrpc_local_seq_next,
+	.stop   = rxrpc_local_seq_stop,
+	.show   = rxrpc_local_seq_show,
+};
+
+/*
+ * Display stats in /proc/net/rxrpc/stats
+ */
+int rxrpc_stats_show(struct seq_file *seq, void *v)
+{
+	struct rxrpc_net *rxnet = rxrpc_net(seq_file_single_net(seq));
+
+	seq_printf(seq,
+		   "Data     : send=%u sendf=%u fail=%u\n",
+		   atomic_read(&rxnet->stat_tx_data_send),
+		   atomic_read(&rxnet->stat_tx_data_send_frag),
+		   atomic_read(&rxnet->stat_tx_data_send_fail));
+	seq_printf(seq,
+		   "Data-Tx  : nr=%u retrans=%u uf=%u cwr=%u\n",
+		   atomic_read(&rxnet->stat_tx_data),
+		   atomic_read(&rxnet->stat_tx_data_retrans),
+		   atomic_read(&rxnet->stat_tx_data_underflow),
+		   atomic_read(&rxnet->stat_tx_data_cwnd_reset));
+	seq_printf(seq,
+		   "Data-Rx  : nr=%u reqack=%u jumbo=%u\n",
+		   atomic_read(&rxnet->stat_rx_data),
+		   atomic_read(&rxnet->stat_rx_data_reqack),
+		   atomic_read(&rxnet->stat_rx_data_jumbo));
+	seq_printf(seq,
+		   "Ack      : fill=%u send=%u skip=%u\n",
+		   atomic_read(&rxnet->stat_tx_ack_fill),
+		   atomic_read(&rxnet->stat_tx_ack_send),
+		   atomic_read(&rxnet->stat_tx_ack_skip));
+	seq_printf(seq,
+		   "Ack-Tx   : req=%u dup=%u oos=%u exw=%u nos=%u png=%u prs=%u dly=%u idl=%u\n",
+		   atomic_read(&rxnet->stat_tx_acks[RXRPC_ACK_REQUESTED]),
+		   atomic_read(&rxnet->stat_tx_acks[RXRPC_ACK_DUPLICATE]),
+		   atomic_read(&rxnet->stat_tx_acks[RXRPC_ACK_OUT_OF_SEQUENCE]),
+		   atomic_read(&rxnet->stat_tx_acks[RXRPC_ACK_EXCEEDS_WINDOW]),
+		   atomic_read(&rxnet->stat_tx_acks[RXRPC_ACK_NOSPACE]),
+		   atomic_read(&rxnet->stat_tx_acks[RXRPC_ACK_PING]),
+		   atomic_read(&rxnet->stat_tx_acks[RXRPC_ACK_PING_RESPONSE]),
+		   atomic_read(&rxnet->stat_tx_acks[RXRPC_ACK_DELAY]),
+		   atomic_read(&rxnet->stat_tx_acks[RXRPC_ACK_IDLE]));
+	seq_printf(seq,
+		   "Ack-Rx   : req=%u dup=%u oos=%u exw=%u nos=%u png=%u prs=%u dly=%u idl=%u\n",
+		   atomic_read(&rxnet->stat_rx_acks[RXRPC_ACK_REQUESTED]),
+		   atomic_read(&rxnet->stat_rx_acks[RXRPC_ACK_DUPLICATE]),
+		   atomic_read(&rxnet->stat_rx_acks[RXRPC_ACK_OUT_OF_SEQUENCE]),
+		   atomic_read(&rxnet->stat_rx_acks[RXRPC_ACK_EXCEEDS_WINDOW]),
+		   atomic_read(&rxnet->stat_rx_acks[RXRPC_ACK_NOSPACE]),
+		   atomic_read(&rxnet->stat_rx_acks[RXRPC_ACK_PING]),
+		   atomic_read(&rxnet->stat_rx_acks[RXRPC_ACK_PING_RESPONSE]),
+		   atomic_read(&rxnet->stat_rx_acks[RXRPC_ACK_DELAY]),
+		   atomic_read(&rxnet->stat_rx_acks[RXRPC_ACK_IDLE]));
+	seq_printf(seq,
+		   "Why-Req-A: acklost=%u already=%u mrtt=%u ortt=%u\n",
+		   atomic_read(&rxnet->stat_why_req_ack[rxrpc_reqack_ack_lost]),
+		   atomic_read(&rxnet->stat_why_req_ack[rxrpc_reqack_already_on]),
+		   atomic_read(&rxnet->stat_why_req_ack[rxrpc_reqack_more_rtt]),
+		   atomic_read(&rxnet->stat_why_req_ack[rxrpc_reqack_old_rtt]));
+	seq_printf(seq,
+		   "Why-Req-A: nolast=%u retx=%u slows=%u smtxw=%u\n",
+		   atomic_read(&rxnet->stat_why_req_ack[rxrpc_reqack_no_srv_last]),
+		   atomic_read(&rxnet->stat_why_req_ack[rxrpc_reqack_retrans]),
+		   atomic_read(&rxnet->stat_why_req_ack[rxrpc_reqack_slow_start]),
+		   atomic_read(&rxnet->stat_why_req_ack[rxrpc_reqack_small_txwin]));
+	seq_printf(seq,
+		   "Buffers  : txb=%u rxb=%u\n",
+		   atomic_read(&rxrpc_nr_txbuf),
+		   atomic_read(&rxrpc_n_rx_skbs));
+	seq_printf(seq,
+		   "IO-thread: loops=%u\n",
+		   atomic_read(&rxnet->stat_io_loop));
+	return 0;
+}
+
+/*
+ * Clear stats if /proc/net/rxrpc/stats is written to.
+ */
+int rxrpc_stats_clear(struct file *file, char *buf, size_t size)
+{
+	struct seq_file *m = file->private_data;
+	struct rxrpc_net *rxnet = rxrpc_net(seq_file_single_net(m));
+
+	if (size > 1 || (size == 1 && buf[0] != '\n'))
+		return -EINVAL;
+
+	atomic_set(&rxnet->stat_tx_data, 0);
+	atomic_set(&rxnet->stat_tx_data_retrans, 0);
+	atomic_set(&rxnet->stat_tx_data_underflow, 0);
+	atomic_set(&rxnet->stat_tx_data_cwnd_reset, 0);
+	atomic_set(&rxnet->stat_tx_data_send, 0);
+	atomic_set(&rxnet->stat_tx_data_send_frag, 0);
+	atomic_set(&rxnet->stat_tx_data_send_fail, 0);
+	atomic_set(&rxnet->stat_rx_data, 0);
+	atomic_set(&rxnet->stat_rx_data_reqack, 0);
+	atomic_set(&rxnet->stat_rx_data_jumbo, 0);
+
+	atomic_set(&rxnet->stat_tx_ack_fill, 0);
+	atomic_set(&rxnet->stat_tx_ack_send, 0);
+	atomic_set(&rxnet->stat_tx_ack_skip, 0);
+	memset(&rxnet->stat_tx_acks, 0, sizeof(rxnet->stat_tx_acks));
+	memset(&rxnet->stat_rx_acks, 0, sizeof(rxnet->stat_rx_acks));
+
+	memset(&rxnet->stat_why_req_ack, 0, sizeof(rxnet->stat_why_req_ack));
+
+	atomic_set(&rxnet->stat_io_loop, 0);
+	return size;
+}