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, 441 insertions, 0 deletions

diff --git a/drivers/input/serio/serio_raw.c b/drivers/input/serio/serio_raw.c
new file mode 100644
index 000000000..1e4770094
--- /dev/null
+++ b/drivers/input/serio/serio_raw.c
@@ -0,0 +1,441 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Raw serio device providing access to a raw byte stream from underlying
+ * serio port. Closely emulates behavior of pre-2.6 /dev/psaux device
+ *
+ * Copyright (c) 2004 Dmitry Torokhov
+ */
+
+#include <linux/kref.h>
+#include <linux/sched.h>
+#include <linux/slab.h>
+#include <linux/poll.h>
+#include <linux/module.h>
+#include <linux/serio.h>
+#include <linux/major.h>
+#include <linux/device.h>
+#include <linux/miscdevice.h>
+#include <linux/wait.h>
+#include <linux/mutex.h>
+
+#define DRIVER_DESC	"Raw serio driver"
+
+MODULE_AUTHOR("Dmitry Torokhov <dtor@mail.ru>");
+MODULE_DESCRIPTION(DRIVER_DESC);
+MODULE_LICENSE("GPL");
+
+#define SERIO_RAW_QUEUE_LEN	64
+struct serio_raw {
+	unsigned char queue[SERIO_RAW_QUEUE_LEN];
+	unsigned int tail, head;
+
+	char name[16];
+	struct kref kref;
+	struct serio *serio;
+	struct miscdevice dev;
+	wait_queue_head_t wait;
+	struct list_head client_list;
+	struct list_head node;
+	bool dead;
+};
+
+struct serio_raw_client {
+	struct fasync_struct *fasync;
+	struct serio_raw *serio_raw;
+	struct list_head node;
+};
+
+static DEFINE_MUTEX(serio_raw_mutex);
+static LIST_HEAD(serio_raw_list);
+
+/*********************************************************************
+ *             Interface with userspace (file operations)            *
+ *********************************************************************/
+
+static int serio_raw_fasync(int fd, struct file *file, int on)
+{
+	struct serio_raw_client *client = file->private_data;
+
+	return fasync_helper(fd, file, on, &client->fasync);
+}
+
+static struct serio_raw *serio_raw_locate(int minor)
+{
+	struct serio_raw *serio_raw;
+
+	list_for_each_entry(serio_raw, &serio_raw_list, node) {
+		if (serio_raw->dev.minor == minor)
+			return serio_raw;
+	}
+
+	return NULL;
+}
+
+static int serio_raw_open(struct inode *inode, struct file *file)
+{
+	struct serio_raw *serio_raw;
+	struct serio_raw_client *client;
+	int retval;
+
+	retval = mutex_lock_interruptible(&serio_raw_mutex);
+	if (retval)
+		return retval;
+
+	serio_raw = serio_raw_locate(iminor(inode));
+	if (!serio_raw) {
+		retval = -ENODEV;
+		goto out;
+	}
+
+	if (serio_raw->dead) {
+		retval = -ENODEV;
+		goto out;
+	}
+
+	client = kzalloc(sizeof(struct serio_raw_client), GFP_KERNEL);
+	if (!client) {
+		retval = -ENOMEM;
+		goto out;
+	}
+
+	client->serio_raw = serio_raw;
+	file->private_data = client;
+
+	kref_get(&serio_raw->kref);
+
+	serio_pause_rx(serio_raw->serio);
+	list_add_tail(&client->node, &serio_raw->client_list);
+	serio_continue_rx(serio_raw->serio);
+
+out:
+	mutex_unlock(&serio_raw_mutex);
+	return retval;
+}
+
+static void serio_raw_free(struct kref *kref)
+{
+	struct serio_raw *serio_raw =
+			container_of(kref, struct serio_raw, kref);
+
+	put_device(&serio_raw->serio->dev);
+	kfree(serio_raw);
+}
+
+static int serio_raw_release(struct inode *inode, struct file *file)
+{
+	struct serio_raw_client *client = file->private_data;
+	struct serio_raw *serio_raw = client->serio_raw;
+
+	serio_pause_rx(serio_raw->serio);
+	list_del(&client->node);
+	serio_continue_rx(serio_raw->serio);
+
+	kfree(client);
+
+	kref_put(&serio_raw->kref, serio_raw_free);
+
+	return 0;
+}
+
+static bool serio_raw_fetch_byte(struct serio_raw *serio_raw, char *c)
+{
+	bool empty;
+
+	serio_pause_rx(serio_raw->serio);
+
+	empty = serio_raw->head == serio_raw->tail;
+	if (!empty) {
+		*c = serio_raw->queue[serio_raw->tail];
+		serio_raw->tail = (serio_raw->tail + 1) % SERIO_RAW_QUEUE_LEN;
+	}
+
+	serio_continue_rx(serio_raw->serio);
+
+	return !empty;
+}
+
+static ssize_t serio_raw_read(struct file *file, char __user *buffer,
+			      size_t count, loff_t *ppos)
+{
+	struct serio_raw_client *client = file->private_data;
+	struct serio_raw *serio_raw = client->serio_raw;
+	char c;
+	ssize_t read = 0;
+	int error;
+
+	for (;;) {
+		if (serio_raw->dead)
+			return -ENODEV;
+
+		if (serio_raw->head == serio_raw->tail &&
+		    (file->f_flags & O_NONBLOCK))
+			return -EAGAIN;
+
+		if (count == 0)
+			break;
+
+		while (read < count && serio_raw_fetch_byte(serio_raw, &c)) {
+			if (put_user(c, buffer++))
+				return -EFAULT;
+			read++;
+		}
+
+		if (read)
+			break;
+
+		if (!(file->f_flags & O_NONBLOCK)) {
+			error = wait_event_interruptible(serio_raw->wait,
+					serio_raw->head != serio_raw->tail ||
+					serio_raw->dead);
+			if (error)
+				return error;
+		}
+	}
+
+	return read;
+}
+
+static ssize_t serio_raw_write(struct file *file, const char __user *buffer,
+			       size_t count, loff_t *ppos)
+{
+	struct serio_raw_client *client = file->private_data;
+	struct serio_raw *serio_raw = client->serio_raw;
+	int retval = 0;
+	unsigned char c;
+
+	retval = mutex_lock_interruptible(&serio_raw_mutex);
+	if (retval)
+		return retval;
+
+	if (serio_raw->dead) {
+		retval = -ENODEV;
+		goto out;
+	}
+
+	if (count > 32)
+		count = 32;
+
+	while (count--) {
+		if (get_user(c, buffer++)) {
+			retval = -EFAULT;
+			goto out;
+		}
+
+		if (serio_write(serio_raw->serio, c)) {
+			/* Either signal error or partial write */
+			if (retval == 0)
+				retval = -EIO;
+			goto out;
+		}
+
+		retval++;
+	}
+
+out:
+	mutex_unlock(&serio_raw_mutex);
+	return retval;
+}
+
+static __poll_t serio_raw_poll(struct file *file, poll_table *wait)
+{
+	struct serio_raw_client *client = file->private_data;
+	struct serio_raw *serio_raw = client->serio_raw;
+	__poll_t mask;
+
+	poll_wait(file, &serio_raw->wait, wait);
+
+	mask = serio_raw->dead ? EPOLLHUP | EPOLLERR : EPOLLOUT | EPOLLWRNORM;
+	if (serio_raw->head != serio_raw->tail)
+		mask |= EPOLLIN | EPOLLRDNORM;
+
+	return mask;
+}
+
+static const struct file_operations serio_raw_fops = {
+	.owner		= THIS_MODULE,
+	.open		= serio_raw_open,
+	.release	= serio_raw_release,
+	.read		= serio_raw_read,
+	.write		= serio_raw_write,
+	.poll		= serio_raw_poll,
+	.fasync		= serio_raw_fasync,
+	.llseek		= noop_llseek,
+};
+
+
+/*********************************************************************
+ *                   Interface with serio port                       *
+ *********************************************************************/
+
+static irqreturn_t serio_raw_interrupt(struct serio *serio, unsigned char data,
+					unsigned int dfl)
+{
+	struct serio_raw *serio_raw = serio_get_drvdata(serio);
+	struct serio_raw_client *client;
+	unsigned int head = serio_raw->head;
+
+	/* we are holding serio->lock here so we are protected */
+	serio_raw->queue[head] = data;
+	head = (head + 1) % SERIO_RAW_QUEUE_LEN;
+	if (likely(head != serio_raw->tail)) {
+		serio_raw->head = head;
+		list_for_each_entry(client, &serio_raw->client_list, node)
+			kill_fasync(&client->fasync, SIGIO, POLL_IN);
+		wake_up_interruptible(&serio_raw->wait);
+	}
+
+	return IRQ_HANDLED;
+}
+
+static int serio_raw_connect(struct serio *serio, struct serio_driver *drv)
+{
+	static atomic_t serio_raw_no = ATOMIC_INIT(-1);
+	struct serio_raw *serio_raw;
+	int err;
+
+	serio_raw = kzalloc(sizeof(struct serio_raw), GFP_KERNEL);
+	if (!serio_raw) {
+		dev_dbg(&serio->dev, "can't allocate memory for a device\n");
+		return -ENOMEM;
+	}
+
+	snprintf(serio_raw->name, sizeof(serio_raw->name),
+		 "serio_raw%ld", (long)atomic_inc_return(&serio_raw_no));
+	kref_init(&serio_raw->kref);
+	INIT_LIST_HEAD(&serio_raw->client_list);
+	init_waitqueue_head(&serio_raw->wait);
+
+	serio_raw->serio = serio;
+	get_device(&serio->dev);
+
+	serio_set_drvdata(serio, serio_raw);
+
+	err = serio_open(serio, drv);
+	if (err)
+		goto err_free;
+
+	err = mutex_lock_killable(&serio_raw_mutex);
+	if (err)
+		goto err_close;
+
+	list_add_tail(&serio_raw->node, &serio_raw_list);
+	mutex_unlock(&serio_raw_mutex);
+
+	serio_raw->dev.minor = PSMOUSE_MINOR;
+	serio_raw->dev.name = serio_raw->name;
+	serio_raw->dev.parent = &serio->dev;
+	serio_raw->dev.fops = &serio_raw_fops;
+
+	err = misc_register(&serio_raw->dev);
+	if (err) {
+		serio_raw->dev.minor = MISC_DYNAMIC_MINOR;
+		err = misc_register(&serio_raw->dev);
+	}
+
+	if (err) {
+		dev_err(&serio->dev,
+			"failed to register raw access device for %s\n",
+			serio->phys);
+		goto err_unlink;
+	}
+
+	dev_info(&serio->dev, "raw access enabled on %s (%s, minor %d)\n",
+		 serio->phys, serio_raw->name, serio_raw->dev.minor);
+	return 0;
+
+err_unlink:
+	list_del_init(&serio_raw->node);
+err_close:
+	serio_close(serio);
+err_free:
+	serio_set_drvdata(serio, NULL);
+	kref_put(&serio_raw->kref, serio_raw_free);
+	return err;
+}
+
+static int serio_raw_reconnect(struct serio *serio)
+{
+	struct serio_raw *serio_raw = serio_get_drvdata(serio);
+	struct serio_driver *drv = serio->drv;
+
+	if (!drv || !serio_raw) {
+		dev_dbg(&serio->dev,
+			"reconnect request, but serio is disconnected, ignoring...\n");
+		return -1;
+	}
+
+	/*
+	 * Nothing needs to be done here, we just need this method to
+	 * keep the same device.
+	 */
+	return 0;
+}
+
+/*
+ * Wake up users waiting for IO so they can disconnect from
+ * dead device.
+ */
+static void serio_raw_hangup(struct serio_raw *serio_raw)
+{
+	struct serio_raw_client *client;
+
+	serio_pause_rx(serio_raw->serio);
+	list_for_each_entry(client, &serio_raw->client_list, node)
+		kill_fasync(&client->fasync, SIGIO, POLL_HUP);
+	serio_continue_rx(serio_raw->serio);
+
+	wake_up_interruptible(&serio_raw->wait);
+}
+
+
+static void serio_raw_disconnect(struct serio *serio)
+{
+	struct serio_raw *serio_raw = serio_get_drvdata(serio);
+
+	misc_deregister(&serio_raw->dev);
+
+	mutex_lock(&serio_raw_mutex);
+	serio_raw->dead = true;
+	list_del_init(&serio_raw->node);
+	mutex_unlock(&serio_raw_mutex);
+
+	serio_raw_hangup(serio_raw);
+
+	serio_close(serio);
+	kref_put(&serio_raw->kref, serio_raw_free);
+
+	serio_set_drvdata(serio, NULL);
+}
+
+static const struct serio_device_id serio_raw_serio_ids[] = {
+	{
+		.type	= SERIO_8042,
+		.proto	= SERIO_ANY,
+		.id	= SERIO_ANY,
+		.extra	= SERIO_ANY,
+	},
+	{
+		.type	= SERIO_8042_XL,
+		.proto	= SERIO_ANY,
+		.id	= SERIO_ANY,
+		.extra	= SERIO_ANY,
+	},
+	{ 0 }
+};
+
+MODULE_DEVICE_TABLE(serio, serio_raw_serio_ids);
+
+static struct serio_driver serio_raw_drv = {
+	.driver		= {
+		.name	= "serio_raw",
+	},
+	.description	= DRIVER_DESC,
+	.id_table	= serio_raw_serio_ids,
+	.interrupt	= serio_raw_interrupt,
+	.connect	= serio_raw_connect,
+	.reconnect	= serio_raw_reconnect,
+	.disconnect	= serio_raw_disconnect,
+	.manual_bind	= true,
+};
+
+module_serio_driver(serio_raw_drv);