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, 489 insertions, 0 deletions

diff --git a/net/rxrpc/conn_object.c b/net/rxrpc/conn_object.c
new file mode 100644
index 000000000..ac85d4644
--- /dev/null
+++ b/net/rxrpc/conn_object.c
@@ -0,0 +1,489 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/* RxRPC virtual connection handler, common bits.
+ *
+ * Copyright (C) 2007, 2016 Red Hat, Inc. All Rights Reserved.
+ * Written by David Howells (dhowells@redhat.com)
+ */
+
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+
+#include <linux/module.h>
+#include <linux/slab.h>
+#include <linux/net.h>
+#include <linux/skbuff.h>
+#include "ar-internal.h"
+
+/*
+ * Time till a connection expires after last use (in seconds).
+ */
+unsigned int __read_mostly rxrpc_connection_expiry = 10 * 60;
+unsigned int __read_mostly rxrpc_closed_conn_expiry = 10;
+
+static void rxrpc_clean_up_connection(struct work_struct *work);
+static void rxrpc_set_service_reap_timer(struct rxrpc_net *rxnet,
+					 unsigned long reap_at);
+
+void rxrpc_poke_conn(struct rxrpc_connection *conn, enum rxrpc_conn_trace why)
+{
+	struct rxrpc_local *local = conn->local;
+	bool busy;
+
+	if (WARN_ON_ONCE(!local))
+		return;
+
+	spin_lock_bh(&local->lock);
+	busy = !list_empty(&conn->attend_link);
+	if (!busy) {
+		rxrpc_get_connection(conn, why);
+		list_add_tail(&conn->attend_link, &local->conn_attend_q);
+	}
+	spin_unlock_bh(&local->lock);
+	rxrpc_wake_up_io_thread(local);
+}
+
+static void rxrpc_connection_timer(struct timer_list *timer)
+{
+	struct rxrpc_connection *conn =
+		container_of(timer, struct rxrpc_connection, timer);
+
+	rxrpc_poke_conn(conn, rxrpc_conn_get_poke_timer);
+}
+
+/*
+ * allocate a new connection
+ */
+struct rxrpc_connection *rxrpc_alloc_connection(struct rxrpc_net *rxnet,
+						gfp_t gfp)
+{
+	struct rxrpc_connection *conn;
+
+	_enter("");
+
+	conn = kzalloc(sizeof(struct rxrpc_connection), gfp);
+	if (conn) {
+		INIT_LIST_HEAD(&conn->cache_link);
+		timer_setup(&conn->timer, &rxrpc_connection_timer, 0);
+		INIT_WORK(&conn->processor, rxrpc_process_connection);
+		INIT_WORK(&conn->destructor, rxrpc_clean_up_connection);
+		INIT_LIST_HEAD(&conn->proc_link);
+		INIT_LIST_HEAD(&conn->link);
+		mutex_init(&conn->security_lock);
+		skb_queue_head_init(&conn->rx_queue);
+		conn->rxnet = rxnet;
+		conn->security = &rxrpc_no_security;
+		spin_lock_init(&conn->state_lock);
+		conn->debug_id = atomic_inc_return(&rxrpc_debug_id);
+		conn->idle_timestamp = jiffies;
+	}
+
+	_leave(" = %p{%d}", conn, conn ? conn->debug_id : 0);
+	return conn;
+}
+
+/*
+ * Look up a connection in the cache by protocol parameters.
+ *
+ * If successful, a pointer to the connection is returned, but no ref is taken.
+ * NULL is returned if there is no match.
+ *
+ * When searching for a service call, if we find a peer but no connection, we
+ * return that through *_peer in case we need to create a new service call.
+ *
+ * The caller must be holding the RCU read lock.
+ */
+struct rxrpc_connection *rxrpc_find_client_connection_rcu(struct rxrpc_local *local,
+							  struct sockaddr_rxrpc *srx,
+							  struct sk_buff *skb)
+{
+	struct rxrpc_connection *conn;
+	struct rxrpc_skb_priv *sp = rxrpc_skb(skb);
+	struct rxrpc_peer *peer;
+
+	_enter(",%x", sp->hdr.cid & RXRPC_CIDMASK);
+
+	/* Look up client connections by connection ID alone as their
+	 * IDs are unique for this machine.
+	 */
+	conn = idr_find(&local->conn_ids, sp->hdr.cid >> RXRPC_CIDSHIFT);
+	if (!conn || refcount_read(&conn->ref) == 0) {
+		_debug("no conn");
+		goto not_found;
+	}
+
+	if (conn->proto.epoch != sp->hdr.epoch ||
+	    conn->local != local)
+		goto not_found;
+
+	peer = conn->peer;
+	switch (srx->transport.family) {
+	case AF_INET:
+		if (peer->srx.transport.sin.sin_port !=
+		    srx->transport.sin.sin_port ||
+		    peer->srx.transport.sin.sin_addr.s_addr !=
+		    srx->transport.sin.sin_addr.s_addr)
+			goto not_found;
+		break;
+#ifdef CONFIG_AF_RXRPC_IPV6
+	case AF_INET6:
+		if (peer->srx.transport.sin6.sin6_port !=
+		    srx->transport.sin6.sin6_port ||
+		    memcmp(&peer->srx.transport.sin6.sin6_addr,
+			   &srx->transport.sin6.sin6_addr,
+			   sizeof(struct in6_addr)) != 0)
+			goto not_found;
+		break;
+#endif
+	default:
+		BUG();
+	}
+
+	_leave(" = %p", conn);
+	return conn;
+
+not_found:
+	_leave(" = NULL");
+	return NULL;
+}
+
+/*
+ * Disconnect a call and clear any channel it occupies when that call
+ * terminates.  The caller must hold the channel_lock and must release the
+ * call's ref on the connection.
+ */
+void __rxrpc_disconnect_call(struct rxrpc_connection *conn,
+			     struct rxrpc_call *call)
+{
+	struct rxrpc_channel *chan =
+		&conn->channels[call->cid & RXRPC_CHANNELMASK];
+
+	_enter("%d,%x", conn->debug_id, call->cid);
+
+	if (chan->call == call) {
+		/* Save the result of the call so that we can repeat it if necessary
+		 * through the channel, whilst disposing of the actual call record.
+		 */
+		trace_rxrpc_disconnect_call(call);
+		switch (call->completion) {
+		case RXRPC_CALL_SUCCEEDED:
+			chan->last_seq = call->rx_highest_seq;
+			chan->last_type = RXRPC_PACKET_TYPE_ACK;
+			break;
+		case RXRPC_CALL_LOCALLY_ABORTED:
+			chan->last_abort = call->abort_code;
+			chan->last_type = RXRPC_PACKET_TYPE_ABORT;
+			break;
+		default:
+			chan->last_abort = RX_CALL_DEAD;
+			chan->last_type = RXRPC_PACKET_TYPE_ABORT;
+			break;
+		}
+
+		chan->last_call = chan->call_id;
+		chan->call_id = chan->call_counter;
+		chan->call = NULL;
+	}
+
+	_leave("");
+}
+
+/*
+ * Disconnect a call and clear any channel it occupies when that call
+ * terminates.
+ */
+void rxrpc_disconnect_call(struct rxrpc_call *call)
+{
+	struct rxrpc_connection *conn = call->conn;
+
+	set_bit(RXRPC_CALL_DISCONNECTED, &call->flags);
+	rxrpc_see_call(call, rxrpc_call_see_disconnected);
+
+	call->peer->cong_ssthresh = call->cong_ssthresh;
+
+	if (!hlist_unhashed(&call->error_link)) {
+		spin_lock(&call->peer->lock);
+		hlist_del_init(&call->error_link);
+		spin_unlock(&call->peer->lock);
+	}
+
+	if (rxrpc_is_client_call(call)) {
+		rxrpc_disconnect_client_call(call->bundle, call);
+	} else {
+		__rxrpc_disconnect_call(conn, call);
+		conn->idle_timestamp = jiffies;
+		if (atomic_dec_and_test(&conn->active))
+			rxrpc_set_service_reap_timer(conn->rxnet,
+						     jiffies + rxrpc_connection_expiry);
+	}
+
+	rxrpc_put_call(call, rxrpc_call_put_io_thread);
+}
+
+/*
+ * Queue a connection's work processor, getting a ref to pass to the work
+ * queue.
+ */
+void rxrpc_queue_conn(struct rxrpc_connection *conn, enum rxrpc_conn_trace why)
+{
+	if (atomic_read(&conn->active) >= 0 &&
+	    rxrpc_queue_work(&conn->processor))
+		rxrpc_see_connection(conn, why);
+}
+
+/*
+ * Note the re-emergence of a connection.
+ */
+void rxrpc_see_connection(struct rxrpc_connection *conn,
+			  enum rxrpc_conn_trace why)
+{
+	if (conn) {
+		int r = refcount_read(&conn->ref);
+
+		trace_rxrpc_conn(conn->debug_id, r, why);
+	}
+}
+
+/*
+ * Get a ref on a connection.
+ */
+struct rxrpc_connection *rxrpc_get_connection(struct rxrpc_connection *conn,
+					      enum rxrpc_conn_trace why)
+{
+	int r;
+
+	__refcount_inc(&conn->ref, &r);
+	trace_rxrpc_conn(conn->debug_id, r + 1, why);
+	return conn;
+}
+
+/*
+ * Try to get a ref on a connection.
+ */
+struct rxrpc_connection *
+rxrpc_get_connection_maybe(struct rxrpc_connection *conn,
+			   enum rxrpc_conn_trace why)
+{
+	int r;
+
+	if (conn) {
+		if (__refcount_inc_not_zero(&conn->ref, &r))
+			trace_rxrpc_conn(conn->debug_id, r + 1, why);
+		else
+			conn = NULL;
+	}
+	return conn;
+}
+
+/*
+ * Set the service connection reap timer.
+ */
+static void rxrpc_set_service_reap_timer(struct rxrpc_net *rxnet,
+					 unsigned long reap_at)
+{
+	if (rxnet->live)
+		timer_reduce(&rxnet->service_conn_reap_timer, reap_at);
+}
+
+/*
+ * destroy a virtual connection
+ */
+static void rxrpc_rcu_free_connection(struct rcu_head *rcu)
+{
+	struct rxrpc_connection *conn =
+		container_of(rcu, struct rxrpc_connection, rcu);
+	struct rxrpc_net *rxnet = conn->rxnet;
+
+	_enter("{%d,u=%d}", conn->debug_id, refcount_read(&conn->ref));
+
+	trace_rxrpc_conn(conn->debug_id, refcount_read(&conn->ref),
+			 rxrpc_conn_free);
+	kfree(conn);
+
+	if (atomic_dec_and_test(&rxnet->nr_conns))
+		wake_up_var(&rxnet->nr_conns);
+}
+
+/*
+ * Clean up a dead connection.
+ */
+static void rxrpc_clean_up_connection(struct work_struct *work)
+{
+	struct rxrpc_connection *conn =
+		container_of(work, struct rxrpc_connection, destructor);
+	struct rxrpc_net *rxnet = conn->rxnet;
+
+	ASSERT(!conn->channels[0].call &&
+	       !conn->channels[1].call &&
+	       !conn->channels[2].call &&
+	       !conn->channels[3].call);
+	ASSERT(list_empty(&conn->cache_link));
+
+	del_timer_sync(&conn->timer);
+	cancel_work_sync(&conn->processor); /* Processing may restart the timer */
+	del_timer_sync(&conn->timer);
+
+	write_lock(&rxnet->conn_lock);
+	list_del_init(&conn->proc_link);
+	write_unlock(&rxnet->conn_lock);
+
+	rxrpc_purge_queue(&conn->rx_queue);
+
+	rxrpc_kill_client_conn(conn);
+
+	conn->security->clear(conn);
+	key_put(conn->key);
+	rxrpc_put_bundle(conn->bundle, rxrpc_bundle_put_conn);
+	rxrpc_put_peer(conn->peer, rxrpc_peer_put_conn);
+	rxrpc_put_local(conn->local, rxrpc_local_put_kill_conn);
+
+	/* Drain the Rx queue.  Note that even though we've unpublished, an
+	 * incoming packet could still be being added to our Rx queue, so we
+	 * will need to drain it again in the RCU cleanup handler.
+	 */
+	rxrpc_purge_queue(&conn->rx_queue);
+
+	call_rcu(&conn->rcu, rxrpc_rcu_free_connection);
+}
+
+/*
+ * Drop a ref on a connection.
+ */
+void rxrpc_put_connection(struct rxrpc_connection *conn,
+			  enum rxrpc_conn_trace why)
+{
+	unsigned int debug_id;
+	bool dead;
+	int r;
+
+	if (!conn)
+		return;
+
+	debug_id = conn->debug_id;
+	dead = __refcount_dec_and_test(&conn->ref, &r);
+	trace_rxrpc_conn(debug_id, r - 1, why);
+	if (dead) {
+		del_timer(&conn->timer);
+		cancel_work(&conn->processor);
+
+		if (in_softirq() || work_busy(&conn->processor) ||
+		    timer_pending(&conn->timer))
+			/* Can't use the rxrpc workqueue as we need to cancel/flush
+			 * something that may be running/waiting there.
+			 */
+			schedule_work(&conn->destructor);
+		else
+			rxrpc_clean_up_connection(&conn->destructor);
+	}
+}
+
+/*
+ * reap dead service connections
+ */
+void rxrpc_service_connection_reaper(struct work_struct *work)
+{
+	struct rxrpc_connection *conn, *_p;
+	struct rxrpc_net *rxnet =
+		container_of(work, struct rxrpc_net, service_conn_reaper);
+	unsigned long expire_at, earliest, idle_timestamp, now;
+	int active;
+
+	LIST_HEAD(graveyard);
+
+	_enter("");
+
+	now = jiffies;
+	earliest = now + MAX_JIFFY_OFFSET;
+
+	write_lock(&rxnet->conn_lock);
+	list_for_each_entry_safe(conn, _p, &rxnet->service_conns, link) {
+		ASSERTCMP(atomic_read(&conn->active), >=, 0);
+		if (likely(atomic_read(&conn->active) > 0))
+			continue;
+		if (conn->state == RXRPC_CONN_SERVICE_PREALLOC)
+			continue;
+
+		if (rxnet->live && !conn->local->dead) {
+			idle_timestamp = READ_ONCE(conn->idle_timestamp);
+			expire_at = idle_timestamp + rxrpc_connection_expiry * HZ;
+			if (conn->local->service_closed)
+				expire_at = idle_timestamp + rxrpc_closed_conn_expiry * HZ;
+
+			_debug("reap CONN %d { a=%d,t=%ld }",
+			       conn->debug_id, atomic_read(&conn->active),
+			       (long)expire_at - (long)now);
+
+			if (time_before(now, expire_at)) {
+				if (time_before(expire_at, earliest))
+					earliest = expire_at;
+				continue;
+			}
+		}
+
+		/* The activity count sits at 0 whilst the conn is unused on
+		 * the list; we reduce that to -1 to make the conn unavailable.
+		 */
+		active = 0;
+		if (!atomic_try_cmpxchg(&conn->active, &active, -1))
+			continue;
+		rxrpc_see_connection(conn, rxrpc_conn_see_reap_service);
+
+		if (rxrpc_conn_is_client(conn))
+			BUG();
+		else
+			rxrpc_unpublish_service_conn(conn);
+
+		list_move_tail(&conn->link, &graveyard);
+	}
+	write_unlock(&rxnet->conn_lock);
+
+	if (earliest != now + MAX_JIFFY_OFFSET) {
+		_debug("reschedule reaper %ld", (long)earliest - (long)now);
+		ASSERT(time_after(earliest, now));
+		rxrpc_set_service_reap_timer(rxnet, earliest);
+	}
+
+	while (!list_empty(&graveyard)) {
+		conn = list_entry(graveyard.next, struct rxrpc_connection,
+				  link);
+		list_del_init(&conn->link);
+
+		ASSERTCMP(atomic_read(&conn->active), ==, -1);
+		rxrpc_put_connection(conn, rxrpc_conn_put_service_reaped);
+	}
+
+	_leave("");
+}
+
+/*
+ * preemptively destroy all the service connection records rather than
+ * waiting for them to time out
+ */
+void rxrpc_destroy_all_connections(struct rxrpc_net *rxnet)
+{
+	struct rxrpc_connection *conn, *_p;
+	bool leak = false;
+
+	_enter("");
+
+	atomic_dec(&rxnet->nr_conns);
+
+	del_timer_sync(&rxnet->service_conn_reap_timer);
+	rxrpc_queue_work(&rxnet->service_conn_reaper);
+	flush_workqueue(rxrpc_workqueue);
+
+	write_lock(&rxnet->conn_lock);
+	list_for_each_entry_safe(conn, _p, &rxnet->service_conns, link) {
+		pr_err("AF_RXRPC: Leaked conn %p {%d}\n",
+		       conn, refcount_read(&conn->ref));
+		leak = true;
+	}
+	write_unlock(&rxnet->conn_lock);
+	BUG_ON(leak);
+
+	ASSERT(list_empty(&rxnet->conn_proc_list));
+
+	/* We need to wait for the connections to be destroyed by RCU as they
+	 * pin things that we still need to get rid of.
+	 */
+	wait_var_event(&rxnet->nr_conns, !atomic_read(&rxnet->nr_conns));
+	_leave("");
+}