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, 384 insertions, 0 deletions

diff --git a/drivers/net/wan/hdlc_x25.c b/drivers/net/wan/hdlc_x25.c
new file mode 100644
index 000000000..f72c92c24
--- /dev/null
+++ b/drivers/net/wan/hdlc_x25.c
@@ -0,0 +1,384 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Generic HDLC support routines for Linux
+ * X.25 support
+ *
+ * Copyright (C) 1999 - 2006 Krzysztof Halasa <khc@pm.waw.pl>
+ */
+
+#include <linux/errno.h>
+#include <linux/gfp.h>
+#include <linux/hdlc.h>
+#include <linux/if_arp.h>
+#include <linux/inetdevice.h>
+#include <linux/init.h>
+#include <linux/kernel.h>
+#include <linux/lapb.h>
+#include <linux/module.h>
+#include <linux/pkt_sched.h>
+#include <linux/poll.h>
+#include <linux/rtnetlink.h>
+#include <linux/skbuff.h>
+#include <net/x25device.h>
+
+struct x25_state {
+	x25_hdlc_proto settings;
+	bool up;
+	spinlock_t up_lock; /* Protects "up" */
+	struct sk_buff_head rx_queue;
+	struct tasklet_struct rx_tasklet;
+};
+
+static int x25_ioctl(struct net_device *dev, struct if_settings *ifs);
+
+static struct x25_state *state(hdlc_device *hdlc)
+{
+	return hdlc->state;
+}
+
+static void x25_rx_queue_kick(struct tasklet_struct *t)
+{
+	struct x25_state *x25st = from_tasklet(x25st, t, rx_tasklet);
+	struct sk_buff *skb = skb_dequeue(&x25st->rx_queue);
+
+	while (skb) {
+		netif_receive_skb_core(skb);
+		skb = skb_dequeue(&x25st->rx_queue);
+	}
+}
+
+/* These functions are callbacks called by LAPB layer */
+
+static void x25_connect_disconnect(struct net_device *dev, int reason, int code)
+{
+	struct x25_state *x25st = state(dev_to_hdlc(dev));
+	struct sk_buff *skb;
+	unsigned char *ptr;
+
+	skb = __dev_alloc_skb(1, GFP_ATOMIC | __GFP_NOMEMALLOC);
+	if (!skb)
+		return;
+
+	ptr = skb_put(skb, 1);
+	*ptr = code;
+
+	skb->protocol = x25_type_trans(skb, dev);
+
+	skb_queue_tail(&x25st->rx_queue, skb);
+	tasklet_schedule(&x25st->rx_tasklet);
+}
+
+static void x25_connected(struct net_device *dev, int reason)
+{
+	x25_connect_disconnect(dev, reason, X25_IFACE_CONNECT);
+}
+
+static void x25_disconnected(struct net_device *dev, int reason)
+{
+	x25_connect_disconnect(dev, reason, X25_IFACE_DISCONNECT);
+}
+
+static int x25_data_indication(struct net_device *dev, struct sk_buff *skb)
+{
+	struct x25_state *x25st = state(dev_to_hdlc(dev));
+	unsigned char *ptr;
+
+	if (skb_cow(skb, 1)) {
+		kfree_skb(skb);
+		return NET_RX_DROP;
+	}
+
+	skb_push(skb, 1);
+
+	ptr  = skb->data;
+	*ptr = X25_IFACE_DATA;
+
+	skb->protocol = x25_type_trans(skb, dev);
+
+	skb_queue_tail(&x25st->rx_queue, skb);
+	tasklet_schedule(&x25st->rx_tasklet);
+	return NET_RX_SUCCESS;
+}
+
+static void x25_data_transmit(struct net_device *dev, struct sk_buff *skb)
+{
+	hdlc_device *hdlc = dev_to_hdlc(dev);
+
+	skb_reset_network_header(skb);
+	skb->protocol = hdlc_type_trans(skb, dev);
+
+	if (dev_nit_active(dev))
+		dev_queue_xmit_nit(skb, dev);
+
+	hdlc->xmit(skb, dev); /* Ignore return value :-( */
+}
+
+static netdev_tx_t x25_xmit(struct sk_buff *skb, struct net_device *dev)
+{
+	hdlc_device *hdlc = dev_to_hdlc(dev);
+	struct x25_state *x25st = state(hdlc);
+	int result;
+
+	/* There should be a pseudo header of 1 byte added by upper layers.
+	 * Check to make sure it is there before reading it.
+	 */
+	if (skb->len < 1) {
+		kfree_skb(skb);
+		return NETDEV_TX_OK;
+	}
+
+	spin_lock_bh(&x25st->up_lock);
+	if (!x25st->up) {
+		spin_unlock_bh(&x25st->up_lock);
+		kfree_skb(skb);
+		return NETDEV_TX_OK;
+	}
+
+	switch (skb->data[0]) {
+	case X25_IFACE_DATA:	/* Data to be transmitted */
+		skb_pull(skb, 1);
+		result = lapb_data_request(dev, skb);
+		if (result != LAPB_OK)
+			dev_kfree_skb(skb);
+		spin_unlock_bh(&x25st->up_lock);
+		return NETDEV_TX_OK;
+
+	case X25_IFACE_CONNECT:
+		result = lapb_connect_request(dev);
+		if (result != LAPB_OK) {
+			if (result == LAPB_CONNECTED)
+				/* Send connect confirm. msg to level 3 */
+				x25_connected(dev, 0);
+			else
+				netdev_err(dev, "LAPB connect request failed, error code = %i\n",
+					   result);
+		}
+		break;
+
+	case X25_IFACE_DISCONNECT:
+		result = lapb_disconnect_request(dev);
+		if (result != LAPB_OK) {
+			if (result == LAPB_NOTCONNECTED)
+				/* Send disconnect confirm. msg to level 3 */
+				x25_disconnected(dev, 0);
+			else
+				netdev_err(dev, "LAPB disconnect request failed, error code = %i\n",
+					   result);
+		}
+		break;
+
+	default:		/* to be defined */
+		break;
+	}
+
+	spin_unlock_bh(&x25st->up_lock);
+	dev_kfree_skb(skb);
+	return NETDEV_TX_OK;
+}
+
+static int x25_open(struct net_device *dev)
+{
+	static const struct lapb_register_struct cb = {
+		.connect_confirmation = x25_connected,
+		.connect_indication = x25_connected,
+		.disconnect_confirmation = x25_disconnected,
+		.disconnect_indication = x25_disconnected,
+		.data_indication = x25_data_indication,
+		.data_transmit = x25_data_transmit,
+	};
+	hdlc_device *hdlc = dev_to_hdlc(dev);
+	struct x25_state *x25st = state(hdlc);
+	struct lapb_parms_struct params;
+	int result;
+
+	result = lapb_register(dev, &cb);
+	if (result != LAPB_OK)
+		return -ENOMEM;
+
+	result = lapb_getparms(dev, &params);
+	if (result != LAPB_OK)
+		return -EINVAL;
+
+	if (state(hdlc)->settings.dce)
+		params.mode = params.mode | LAPB_DCE;
+
+	if (state(hdlc)->settings.modulo == 128)
+		params.mode = params.mode | LAPB_EXTENDED;
+
+	params.window = state(hdlc)->settings.window;
+	params.t1 = state(hdlc)->settings.t1;
+	params.t2 = state(hdlc)->settings.t2;
+	params.n2 = state(hdlc)->settings.n2;
+
+	result = lapb_setparms(dev, &params);
+	if (result != LAPB_OK)
+		return -EINVAL;
+
+	spin_lock_bh(&x25st->up_lock);
+	x25st->up = true;
+	spin_unlock_bh(&x25st->up_lock);
+
+	return 0;
+}
+
+static void x25_close(struct net_device *dev)
+{
+	hdlc_device *hdlc = dev_to_hdlc(dev);
+	struct x25_state *x25st = state(hdlc);
+
+	spin_lock_bh(&x25st->up_lock);
+	x25st->up = false;
+	spin_unlock_bh(&x25st->up_lock);
+
+	lapb_unregister(dev);
+	tasklet_kill(&x25st->rx_tasklet);
+}
+
+static int x25_rx(struct sk_buff *skb)
+{
+	struct net_device *dev = skb->dev;
+	hdlc_device *hdlc = dev_to_hdlc(dev);
+	struct x25_state *x25st = state(hdlc);
+
+	skb = skb_share_check(skb, GFP_ATOMIC);
+	if (!skb) {
+		dev->stats.rx_dropped++;
+		return NET_RX_DROP;
+	}
+
+	spin_lock_bh(&x25st->up_lock);
+	if (!x25st->up) {
+		spin_unlock_bh(&x25st->up_lock);
+		kfree_skb(skb);
+		dev->stats.rx_dropped++;
+		return NET_RX_DROP;
+	}
+
+	if (lapb_data_received(dev, skb) == LAPB_OK) {
+		spin_unlock_bh(&x25st->up_lock);
+		return NET_RX_SUCCESS;
+	}
+
+	spin_unlock_bh(&x25st->up_lock);
+	dev->stats.rx_errors++;
+	dev_kfree_skb_any(skb);
+	return NET_RX_DROP;
+}
+
+static struct hdlc_proto proto = {
+	.open		= x25_open,
+	.close		= x25_close,
+	.ioctl		= x25_ioctl,
+	.netif_rx	= x25_rx,
+	.xmit		= x25_xmit,
+	.module		= THIS_MODULE,
+};
+
+static int x25_ioctl(struct net_device *dev, struct if_settings *ifs)
+{
+	x25_hdlc_proto __user *x25_s = ifs->ifs_ifsu.x25;
+	const size_t size = sizeof(x25_hdlc_proto);
+	hdlc_device *hdlc = dev_to_hdlc(dev);
+	x25_hdlc_proto new_settings;
+	int result;
+
+	switch (ifs->type) {
+	case IF_GET_PROTO:
+		if (dev_to_hdlc(dev)->proto != &proto)
+			return -EINVAL;
+		ifs->type = IF_PROTO_X25;
+		if (ifs->size < size) {
+			ifs->size = size; /* data size wanted */
+			return -ENOBUFS;
+		}
+		if (copy_to_user(x25_s, &state(hdlc)->settings, size))
+			return -EFAULT;
+		return 0;
+
+	case IF_PROTO_X25:
+		if (!capable(CAP_NET_ADMIN))
+			return -EPERM;
+
+		if (dev->flags & IFF_UP)
+			return -EBUSY;
+
+		/* backward compatibility */
+		if (ifs->size == 0) {
+			new_settings.dce = 0;
+			new_settings.modulo = 8;
+			new_settings.window = 7;
+			new_settings.t1 = 3;
+			new_settings.t2 = 1;
+			new_settings.n2 = 10;
+		} else {
+			if (copy_from_user(&new_settings, x25_s, size))
+				return -EFAULT;
+
+			if ((new_settings.dce != 0 &&
+			     new_settings.dce != 1) ||
+			    (new_settings.modulo != 8 &&
+			     new_settings.modulo != 128) ||
+			    new_settings.window < 1 ||
+			    (new_settings.modulo == 8 &&
+			     new_settings.window > 7) ||
+			    (new_settings.modulo == 128 &&
+			     new_settings.window > 127) ||
+			    new_settings.t1 < 1 ||
+			    new_settings.t1 > 255 ||
+			    new_settings.t2 < 1 ||
+			    new_settings.t2 > 255 ||
+			    new_settings.n2 < 1 ||
+			    new_settings.n2 > 255)
+				return -EINVAL;
+		}
+
+		result = hdlc->attach(dev, ENCODING_NRZ,
+				      PARITY_CRC16_PR1_CCITT);
+		if (result)
+			return result;
+
+		result = attach_hdlc_protocol(dev, &proto,
+					      sizeof(struct x25_state));
+		if (result)
+			return result;
+
+		memcpy(&state(hdlc)->settings, &new_settings, size);
+		state(hdlc)->up = false;
+		spin_lock_init(&state(hdlc)->up_lock);
+		skb_queue_head_init(&state(hdlc)->rx_queue);
+		tasklet_setup(&state(hdlc)->rx_tasklet, x25_rx_queue_kick);
+
+		/* There's no header_ops so hard_header_len should be 0. */
+		dev->hard_header_len = 0;
+		/* When transmitting data:
+		 * first we'll remove a pseudo header of 1 byte,
+		 * then we'll prepend an LAPB header of at most 3 bytes.
+		 */
+		dev->needed_headroom = 3 - 1;
+
+		dev->type = ARPHRD_X25;
+		call_netdevice_notifiers(NETDEV_POST_TYPE_CHANGE, dev);
+		netif_dormant_off(dev);
+		return 0;
+	}
+
+	return -EINVAL;
+}
+
+static int __init hdlc_x25_init(void)
+{
+	register_hdlc_protocol(&proto);
+	return 0;
+}
+
+static void __exit hdlc_x25_exit(void)
+{
+	unregister_hdlc_protocol(&proto);
+}
+
+module_init(hdlc_x25_init);
+module_exit(hdlc_x25_exit);
+
+MODULE_AUTHOR("Krzysztof Halasa <khc@pm.waw.pl>");
+MODULE_DESCRIPTION("X.25 protocol support for generic HDLC");
+MODULE_LICENSE("GPL v2");