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, 498 insertions, 0 deletions

diff --git a/net/can/proc.c b/net/can/proc.c
new file mode 100644
index 000000000..bbce97825
--- /dev/null
+++ b/net/can/proc.c
@@ -0,0 +1,498 @@
+// SPDX-License-Identifier: (GPL-2.0 OR BSD-3-Clause)
+/*
+ * proc.c - procfs support for Protocol family CAN core module
+ *
+ * Copyright (c) 2002-2007 Volkswagen Group Electronic Research
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of Volkswagen nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * Alternatively, provided that this notice is retained in full, this
+ * software may be distributed under the terms of the GNU General
+ * Public License ("GPL") version 2, in which case the provisions of the
+ * GPL apply INSTEAD OF those given above.
+ *
+ * The provided data structures and external interfaces from this code
+ * are not restricted to be used by modules with a GPL compatible license.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH
+ * DAMAGE.
+ *
+ */
+
+#include <linux/module.h>
+#include <linux/proc_fs.h>
+#include <linux/list.h>
+#include <linux/rcupdate.h>
+#include <linux/if_arp.h>
+#include <linux/can/can-ml.h>
+#include <linux/can/core.h>
+
+#include "af_can.h"
+
+/*
+ * proc filenames for the PF_CAN core
+ */
+
+#define CAN_PROC_STATS       "stats"
+#define CAN_PROC_RESET_STATS "reset_stats"
+#define CAN_PROC_RCVLIST_ALL "rcvlist_all"
+#define CAN_PROC_RCVLIST_FIL "rcvlist_fil"
+#define CAN_PROC_RCVLIST_INV "rcvlist_inv"
+#define CAN_PROC_RCVLIST_SFF "rcvlist_sff"
+#define CAN_PROC_RCVLIST_EFF "rcvlist_eff"
+#define CAN_PROC_RCVLIST_ERR "rcvlist_err"
+
+static int user_reset;
+
+static const char rx_list_name[][8] = {
+	[RX_ERR] = "rx_err",
+	[RX_ALL] = "rx_all",
+	[RX_FIL] = "rx_fil",
+	[RX_INV] = "rx_inv",
+};
+
+/*
+ * af_can statistics stuff
+ */
+
+static void can_init_stats(struct net *net)
+{
+	struct can_pkg_stats *pkg_stats = net->can.pkg_stats;
+	struct can_rcv_lists_stats *rcv_lists_stats = net->can.rcv_lists_stats;
+	/*
+	 * This memset function is called from a timer context (when
+	 * can_stattimer is active which is the default) OR in a process
+	 * context (reading the proc_fs when can_stattimer is disabled).
+	 */
+	memset(pkg_stats, 0, sizeof(struct can_pkg_stats));
+	pkg_stats->jiffies_init = jiffies;
+
+	rcv_lists_stats->stats_reset++;
+
+	if (user_reset) {
+		user_reset = 0;
+		rcv_lists_stats->user_reset++;
+	}
+}
+
+static unsigned long calc_rate(unsigned long oldjif, unsigned long newjif,
+			       unsigned long count)
+{
+	if (oldjif == newjif)
+		return 0;
+
+	/* see can_stat_update() - this should NEVER happen! */
+	if (count > (ULONG_MAX / HZ)) {
+		printk(KERN_ERR "can: calc_rate: count exceeded! %ld\n",
+		       count);
+		return 99999999;
+	}
+
+	return (count * HZ) / (newjif - oldjif);
+}
+
+void can_stat_update(struct timer_list *t)
+{
+	struct net *net = from_timer(net, t, can.stattimer);
+	struct can_pkg_stats *pkg_stats = net->can.pkg_stats;
+	unsigned long j = jiffies; /* snapshot */
+
+	/* restart counting in timer context on user request */
+	if (user_reset)
+		can_init_stats(net);
+
+	/* restart counting on jiffies overflow */
+	if (j < pkg_stats->jiffies_init)
+		can_init_stats(net);
+
+	/* prevent overflow in calc_rate() */
+	if (pkg_stats->rx_frames > (ULONG_MAX / HZ))
+		can_init_stats(net);
+
+	/* prevent overflow in calc_rate() */
+	if (pkg_stats->tx_frames > (ULONG_MAX / HZ))
+		can_init_stats(net);
+
+	/* matches overflow - very improbable */
+	if (pkg_stats->matches > (ULONG_MAX / 100))
+		can_init_stats(net);
+
+	/* calc total values */
+	if (pkg_stats->rx_frames)
+		pkg_stats->total_rx_match_ratio = (pkg_stats->matches * 100) /
+			pkg_stats->rx_frames;
+
+	pkg_stats->total_tx_rate = calc_rate(pkg_stats->jiffies_init, j,
+					    pkg_stats->tx_frames);
+	pkg_stats->total_rx_rate = calc_rate(pkg_stats->jiffies_init, j,
+					    pkg_stats->rx_frames);
+
+	/* calc current values */
+	if (pkg_stats->rx_frames_delta)
+		pkg_stats->current_rx_match_ratio =
+			(pkg_stats->matches_delta * 100) /
+			pkg_stats->rx_frames_delta;
+
+	pkg_stats->current_tx_rate = calc_rate(0, HZ, pkg_stats->tx_frames_delta);
+	pkg_stats->current_rx_rate = calc_rate(0, HZ, pkg_stats->rx_frames_delta);
+
+	/* check / update maximum values */
+	if (pkg_stats->max_tx_rate < pkg_stats->current_tx_rate)
+		pkg_stats->max_tx_rate = pkg_stats->current_tx_rate;
+
+	if (pkg_stats->max_rx_rate < pkg_stats->current_rx_rate)
+		pkg_stats->max_rx_rate = pkg_stats->current_rx_rate;
+
+	if (pkg_stats->max_rx_match_ratio < pkg_stats->current_rx_match_ratio)
+		pkg_stats->max_rx_match_ratio = pkg_stats->current_rx_match_ratio;
+
+	/* clear values for 'current rate' calculation */
+	pkg_stats->tx_frames_delta = 0;
+	pkg_stats->rx_frames_delta = 0;
+	pkg_stats->matches_delta   = 0;
+
+	/* restart timer (one second) */
+	mod_timer(&net->can.stattimer, round_jiffies(jiffies + HZ));
+}
+
+/*
+ * proc read functions
+ */
+
+static void can_print_rcvlist(struct seq_file *m, struct hlist_head *rx_list,
+			      struct net_device *dev)
+{
+	struct receiver *r;
+
+	hlist_for_each_entry_rcu(r, rx_list, list) {
+		char *fmt = (r->can_id & CAN_EFF_FLAG)?
+			"   %-5s  %08x  %08x  %pK  %pK  %8ld  %s\n" :
+			"   %-5s     %03x    %08x  %pK  %pK  %8ld  %s\n";
+
+		seq_printf(m, fmt, DNAME(dev), r->can_id, r->mask,
+				r->func, r->data, r->matches, r->ident);
+	}
+}
+
+static void can_print_recv_banner(struct seq_file *m)
+{
+	/*
+	 *                  can1.  00000000  00000000  00000000
+	 *                 .......          0  tp20
+	 */
+	if (IS_ENABLED(CONFIG_64BIT))
+		seq_puts(m, "  device   can_id   can_mask      function          userdata       matches  ident\n");
+	else
+		seq_puts(m, "  device   can_id   can_mask  function  userdata   matches  ident\n");
+}
+
+static int can_stats_proc_show(struct seq_file *m, void *v)
+{
+	struct net *net = m->private;
+	struct can_pkg_stats *pkg_stats = net->can.pkg_stats;
+	struct can_rcv_lists_stats *rcv_lists_stats = net->can.rcv_lists_stats;
+
+	seq_putc(m, '\n');
+	seq_printf(m, " %8ld transmitted frames (TXF)\n", pkg_stats->tx_frames);
+	seq_printf(m, " %8ld received frames (RXF)\n", pkg_stats->rx_frames);
+	seq_printf(m, " %8ld matched frames (RXMF)\n", pkg_stats->matches);
+
+	seq_putc(m, '\n');
+
+	if (net->can.stattimer.function == can_stat_update) {
+		seq_printf(m, " %8ld %% total match ratio (RXMR)\n",
+				pkg_stats->total_rx_match_ratio);
+
+		seq_printf(m, " %8ld frames/s total tx rate (TXR)\n",
+				pkg_stats->total_tx_rate);
+		seq_printf(m, " %8ld frames/s total rx rate (RXR)\n",
+				pkg_stats->total_rx_rate);
+
+		seq_putc(m, '\n');
+
+		seq_printf(m, " %8ld %% current match ratio (CRXMR)\n",
+				pkg_stats->current_rx_match_ratio);
+
+		seq_printf(m, " %8ld frames/s current tx rate (CTXR)\n",
+				pkg_stats->current_tx_rate);
+		seq_printf(m, " %8ld frames/s current rx rate (CRXR)\n",
+				pkg_stats->current_rx_rate);
+
+		seq_putc(m, '\n');
+
+		seq_printf(m, " %8ld %% max match ratio (MRXMR)\n",
+				pkg_stats->max_rx_match_ratio);
+
+		seq_printf(m, " %8ld frames/s max tx rate (MTXR)\n",
+				pkg_stats->max_tx_rate);
+		seq_printf(m, " %8ld frames/s max rx rate (MRXR)\n",
+				pkg_stats->max_rx_rate);
+
+		seq_putc(m, '\n');
+	}
+
+	seq_printf(m, " %8ld current receive list entries (CRCV)\n",
+			rcv_lists_stats->rcv_entries);
+	seq_printf(m, " %8ld maximum receive list entries (MRCV)\n",
+			rcv_lists_stats->rcv_entries_max);
+
+	if (rcv_lists_stats->stats_reset)
+		seq_printf(m, "\n %8ld statistic resets (STR)\n",
+				rcv_lists_stats->stats_reset);
+
+	if (rcv_lists_stats->user_reset)
+		seq_printf(m, " %8ld user statistic resets (USTR)\n",
+				rcv_lists_stats->user_reset);
+
+	seq_putc(m, '\n');
+	return 0;
+}
+
+static int can_reset_stats_proc_show(struct seq_file *m, void *v)
+{
+	struct net *net = m->private;
+	struct can_rcv_lists_stats *rcv_lists_stats = net->can.rcv_lists_stats;
+	struct can_pkg_stats *pkg_stats = net->can.pkg_stats;
+
+	user_reset = 1;
+
+	if (net->can.stattimer.function == can_stat_update) {
+		seq_printf(m, "Scheduled statistic reset #%ld.\n",
+				rcv_lists_stats->stats_reset + 1);
+	} else {
+		if (pkg_stats->jiffies_init != jiffies)
+			can_init_stats(net);
+
+		seq_printf(m, "Performed statistic reset #%ld.\n",
+				rcv_lists_stats->stats_reset);
+	}
+	return 0;
+}
+
+static inline void can_rcvlist_proc_show_one(struct seq_file *m, int idx,
+					     struct net_device *dev,
+					     struct can_dev_rcv_lists *dev_rcv_lists)
+{
+	if (!hlist_empty(&dev_rcv_lists->rx[idx])) {
+		can_print_recv_banner(m);
+		can_print_rcvlist(m, &dev_rcv_lists->rx[idx], dev);
+	} else
+		seq_printf(m, "  (%s: no entry)\n", DNAME(dev));
+
+}
+
+static int can_rcvlist_proc_show(struct seq_file *m, void *v)
+{
+	/* double cast to prevent GCC warning */
+	int idx = (int)(long)pde_data(m->file->f_inode);
+	struct net_device *dev;
+	struct can_dev_rcv_lists *dev_rcv_lists;
+	struct net *net = m->private;
+
+	seq_printf(m, "\nreceive list '%s':\n", rx_list_name[idx]);
+
+	rcu_read_lock();
+
+	/* receive list for 'all' CAN devices (dev == NULL) */
+	dev_rcv_lists = net->can.rx_alldev_list;
+	can_rcvlist_proc_show_one(m, idx, NULL, dev_rcv_lists);
+
+	/* receive list for registered CAN devices */
+	for_each_netdev_rcu(net, dev) {
+		struct can_ml_priv *can_ml = can_get_ml_priv(dev);
+
+		if (can_ml)
+			can_rcvlist_proc_show_one(m, idx, dev,
+						  &can_ml->dev_rcv_lists);
+	}
+
+	rcu_read_unlock();
+
+	seq_putc(m, '\n');
+	return 0;
+}
+
+static inline void can_rcvlist_proc_show_array(struct seq_file *m,
+					       struct net_device *dev,
+					       struct hlist_head *rcv_array,
+					       unsigned int rcv_array_sz)
+{
+	unsigned int i;
+	int all_empty = 1;
+
+	/* check whether at least one list is non-empty */
+	for (i = 0; i < rcv_array_sz; i++)
+		if (!hlist_empty(&rcv_array[i])) {
+			all_empty = 0;
+			break;
+		}
+
+	if (!all_empty) {
+		can_print_recv_banner(m);
+		for (i = 0; i < rcv_array_sz; i++) {
+			if (!hlist_empty(&rcv_array[i]))
+				can_print_rcvlist(m, &rcv_array[i], dev);
+		}
+	} else
+		seq_printf(m, "  (%s: no entry)\n", DNAME(dev));
+}
+
+static int can_rcvlist_sff_proc_show(struct seq_file *m, void *v)
+{
+	struct net_device *dev;
+	struct can_dev_rcv_lists *dev_rcv_lists;
+	struct net *net = m->private;
+
+	/* RX_SFF */
+	seq_puts(m, "\nreceive list 'rx_sff':\n");
+
+	rcu_read_lock();
+
+	/* sff receive list for 'all' CAN devices (dev == NULL) */
+	dev_rcv_lists = net->can.rx_alldev_list;
+	can_rcvlist_proc_show_array(m, NULL, dev_rcv_lists->rx_sff,
+				    ARRAY_SIZE(dev_rcv_lists->rx_sff));
+
+	/* sff receive list for registered CAN devices */
+	for_each_netdev_rcu(net, dev) {
+		struct can_ml_priv *can_ml = can_get_ml_priv(dev);
+
+		if (can_ml) {
+			dev_rcv_lists = &can_ml->dev_rcv_lists;
+			can_rcvlist_proc_show_array(m, dev, dev_rcv_lists->rx_sff,
+						    ARRAY_SIZE(dev_rcv_lists->rx_sff));
+		}
+	}
+
+	rcu_read_unlock();
+
+	seq_putc(m, '\n');
+	return 0;
+}
+
+static int can_rcvlist_eff_proc_show(struct seq_file *m, void *v)
+{
+	struct net_device *dev;
+	struct can_dev_rcv_lists *dev_rcv_lists;
+	struct net *net = m->private;
+
+	/* RX_EFF */
+	seq_puts(m, "\nreceive list 'rx_eff':\n");
+
+	rcu_read_lock();
+
+	/* eff receive list for 'all' CAN devices (dev == NULL) */
+	dev_rcv_lists = net->can.rx_alldev_list;
+	can_rcvlist_proc_show_array(m, NULL, dev_rcv_lists->rx_eff,
+				    ARRAY_SIZE(dev_rcv_lists->rx_eff));
+
+	/* eff receive list for registered CAN devices */
+	for_each_netdev_rcu(net, dev) {
+		struct can_ml_priv *can_ml = can_get_ml_priv(dev);
+
+		if (can_ml) {
+			dev_rcv_lists = &can_ml->dev_rcv_lists;
+			can_rcvlist_proc_show_array(m, dev, dev_rcv_lists->rx_eff,
+						    ARRAY_SIZE(dev_rcv_lists->rx_eff));
+		}
+	}
+
+	rcu_read_unlock();
+
+	seq_putc(m, '\n');
+	return 0;
+}
+
+/*
+ * can_init_proc - create main CAN proc directory and procfs entries
+ */
+void can_init_proc(struct net *net)
+{
+	/* create /proc/net/can directory */
+	net->can.proc_dir = proc_net_mkdir(net, "can", net->proc_net);
+
+	if (!net->can.proc_dir) {
+		printk(KERN_INFO "can: failed to create /proc/net/can . "
+			   "CONFIG_PROC_FS missing?\n");
+		return;
+	}
+
+	/* own procfs entries from the AF_CAN core */
+	net->can.pde_stats = proc_create_net_single(CAN_PROC_STATS, 0644,
+			net->can.proc_dir, can_stats_proc_show, NULL);
+	net->can.pde_reset_stats = proc_create_net_single(CAN_PROC_RESET_STATS,
+			0644, net->can.proc_dir, can_reset_stats_proc_show,
+			NULL);
+	net->can.pde_rcvlist_err = proc_create_net_single(CAN_PROC_RCVLIST_ERR,
+			0644, net->can.proc_dir, can_rcvlist_proc_show,
+			(void *)RX_ERR);
+	net->can.pde_rcvlist_all = proc_create_net_single(CAN_PROC_RCVLIST_ALL,
+			0644, net->can.proc_dir, can_rcvlist_proc_show,
+			(void *)RX_ALL);
+	net->can.pde_rcvlist_fil = proc_create_net_single(CAN_PROC_RCVLIST_FIL,
+			0644, net->can.proc_dir, can_rcvlist_proc_show,
+			(void *)RX_FIL);
+	net->can.pde_rcvlist_inv = proc_create_net_single(CAN_PROC_RCVLIST_INV,
+			0644, net->can.proc_dir, can_rcvlist_proc_show,
+			(void *)RX_INV);
+	net->can.pde_rcvlist_eff = proc_create_net_single(CAN_PROC_RCVLIST_EFF,
+			0644, net->can.proc_dir, can_rcvlist_eff_proc_show, NULL);
+	net->can.pde_rcvlist_sff = proc_create_net_single(CAN_PROC_RCVLIST_SFF,
+			0644, net->can.proc_dir, can_rcvlist_sff_proc_show, NULL);
+}
+
+/*
+ * can_remove_proc - remove procfs entries and main CAN proc directory
+ */
+void can_remove_proc(struct net *net)
+{
+	if (!net->can.proc_dir)
+		return;
+
+	if (net->can.pde_stats)
+		remove_proc_entry(CAN_PROC_STATS, net->can.proc_dir);
+
+	if (net->can.pde_reset_stats)
+		remove_proc_entry(CAN_PROC_RESET_STATS, net->can.proc_dir);
+
+	if (net->can.pde_rcvlist_err)
+		remove_proc_entry(CAN_PROC_RCVLIST_ERR, net->can.proc_dir);
+
+	if (net->can.pde_rcvlist_all)
+		remove_proc_entry(CAN_PROC_RCVLIST_ALL, net->can.proc_dir);
+
+	if (net->can.pde_rcvlist_fil)
+		remove_proc_entry(CAN_PROC_RCVLIST_FIL, net->can.proc_dir);
+
+	if (net->can.pde_rcvlist_inv)
+		remove_proc_entry(CAN_PROC_RCVLIST_INV, net->can.proc_dir);
+
+	if (net->can.pde_rcvlist_eff)
+		remove_proc_entry(CAN_PROC_RCVLIST_EFF, net->can.proc_dir);
+
+	if (net->can.pde_rcvlist_sff)
+		remove_proc_entry(CAN_PROC_RCVLIST_SFF, net->can.proc_dir);
+
+	remove_proc_entry("can", net->proc_net);
+}