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, 247 insertions, 0 deletions

diff --git a/drivers/usb/core/file.c b/drivers/usb/core/file.c
new file mode 100644
index 000000000..da7d88e06
--- /dev/null
+++ b/drivers/usb/core/file.c
@@ -0,0 +1,247 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * drivers/usb/core/file.c
+ *
+ * (C) Copyright Linus Torvalds 1999
+ * (C) Copyright Johannes Erdfelt 1999-2001
+ * (C) Copyright Andreas Gal 1999
+ * (C) Copyright Gregory P. Smith 1999
+ * (C) Copyright Deti Fliegl 1999 (new USB architecture)
+ * (C) Copyright Randy Dunlap 2000
+ * (C) Copyright David Brownell 2000-2001 (kernel hotplug, usb_device_id,
+ *	more docs, etc)
+ * (C) Copyright Yggdrasil Computing, Inc. 2000
+ *     (usb_device_id matching changes by Adam J. Richter)
+ * (C) Copyright Greg Kroah-Hartman 2002-2003
+ *
+ * Released under the GPLv2 only.
+ */
+
+#include <linux/module.h>
+#include <linux/errno.h>
+#include <linux/rwsem.h>
+#include <linux/slab.h>
+#include <linux/string.h>
+#include <linux/usb.h>
+
+#include "usb.h"
+
+#define MAX_USB_MINORS	256
+static const struct file_operations *usb_minors[MAX_USB_MINORS];
+static DECLARE_RWSEM(minor_rwsem);
+static DEFINE_MUTEX(init_usb_class_mutex);
+
+static int usb_open(struct inode *inode, struct file *file)
+{
+	int err = -ENODEV;
+	const struct file_operations *new_fops;
+
+	down_read(&minor_rwsem);
+	new_fops = fops_get(usb_minors[iminor(inode)]);
+
+	if (!new_fops)
+		goto done;
+
+	replace_fops(file, new_fops);
+	/* Curiouser and curiouser... NULL ->open() as "no device" ? */
+	if (file->f_op->open)
+		err = file->f_op->open(inode, file);
+ done:
+	up_read(&minor_rwsem);
+	return err;
+}
+
+static const struct file_operations usb_fops = {
+	.owner =	THIS_MODULE,
+	.open =		usb_open,
+	.llseek =	noop_llseek,
+};
+
+static struct usb_class {
+	struct kref kref;
+	struct class *class;
+} *usb_class;
+
+static char *usb_devnode(const struct device *dev, umode_t *mode)
+{
+	struct usb_class_driver *drv;
+
+	drv = dev_get_drvdata(dev);
+	if (!drv || !drv->devnode)
+		return NULL;
+	return drv->devnode(dev, mode);
+}
+
+static int init_usb_class(void)
+{
+	int result = 0;
+
+	if (usb_class != NULL) {
+		kref_get(&usb_class->kref);
+		goto exit;
+	}
+
+	usb_class = kmalloc(sizeof(*usb_class), GFP_KERNEL);
+	if (!usb_class) {
+		result = -ENOMEM;
+		goto exit;
+	}
+
+	kref_init(&usb_class->kref);
+	usb_class->class = class_create(THIS_MODULE, "usbmisc");
+	if (IS_ERR(usb_class->class)) {
+		result = PTR_ERR(usb_class->class);
+		printk(KERN_ERR "class_create failed for usb devices\n");
+		kfree(usb_class);
+		usb_class = NULL;
+		goto exit;
+	}
+	usb_class->class->devnode = usb_devnode;
+
+exit:
+	return result;
+}
+
+static void release_usb_class(struct kref *kref)
+{
+	/* Ok, we cheat as we know we only have one usb_class */
+	class_destroy(usb_class->class);
+	kfree(usb_class);
+	usb_class = NULL;
+}
+
+static void destroy_usb_class(void)
+{
+	mutex_lock(&init_usb_class_mutex);
+	kref_put(&usb_class->kref, release_usb_class);
+	mutex_unlock(&init_usb_class_mutex);
+}
+
+int usb_major_init(void)
+{
+	int error;
+
+	error = register_chrdev(USB_MAJOR, "usb", &usb_fops);
+	if (error)
+		printk(KERN_ERR "Unable to get major %d for usb devices\n",
+		       USB_MAJOR);
+
+	return error;
+}
+
+void usb_major_cleanup(void)
+{
+	unregister_chrdev(USB_MAJOR, "usb");
+}
+
+/**
+ * usb_register_dev - register a USB device, and ask for a minor number
+ * @intf: pointer to the usb_interface that is being registered
+ * @class_driver: pointer to the usb_class_driver for this device
+ *
+ * This should be called by all USB drivers that use the USB major number.
+ * If CONFIG_USB_DYNAMIC_MINORS is enabled, the minor number will be
+ * dynamically allocated out of the list of available ones.  If it is not
+ * enabled, the minor number will be based on the next available free minor,
+ * starting at the class_driver->minor_base.
+ *
+ * This function also creates a usb class device in the sysfs tree.
+ *
+ * usb_deregister_dev() must be called when the driver is done with
+ * the minor numbers given out by this function.
+ *
+ * Return: -EINVAL if something bad happens with trying to register a
+ * device, and 0 on success.
+ */
+int usb_register_dev(struct usb_interface *intf,
+		     struct usb_class_driver *class_driver)
+{
+	int retval;
+	int minor_base = class_driver->minor_base;
+	int minor;
+	char name[20];
+
+#ifdef CONFIG_USB_DYNAMIC_MINORS
+	/*
+	 * We don't care what the device tries to start at, we want to start
+	 * at zero to pack the devices into the smallest available space with
+	 * no holes in the minor range.
+	 */
+	minor_base = 0;
+#endif
+
+	if (class_driver->fops == NULL)
+		return -EINVAL;
+	if (intf->minor >= 0)
+		return -EADDRINUSE;
+
+	mutex_lock(&init_usb_class_mutex);
+	retval = init_usb_class();
+	mutex_unlock(&init_usb_class_mutex);
+
+	if (retval)
+		return retval;
+
+	dev_dbg(&intf->dev, "looking for a minor, starting at %d\n", minor_base);
+
+	down_write(&minor_rwsem);
+	for (minor = minor_base; minor < MAX_USB_MINORS; ++minor) {
+		if (usb_minors[minor])
+			continue;
+
+		usb_minors[minor] = class_driver->fops;
+		intf->minor = minor;
+		break;
+	}
+	if (intf->minor < 0) {
+		up_write(&minor_rwsem);
+		return -EXFULL;
+	}
+
+	/* create a usb class device for this usb interface */
+	snprintf(name, sizeof(name), class_driver->name, minor - minor_base);
+	intf->usb_dev = device_create(usb_class->class, &intf->dev,
+				      MKDEV(USB_MAJOR, minor), class_driver,
+				      "%s", kbasename(name));
+	if (IS_ERR(intf->usb_dev)) {
+		usb_minors[minor] = NULL;
+		intf->minor = -1;
+		retval = PTR_ERR(intf->usb_dev);
+	}
+	up_write(&minor_rwsem);
+	return retval;
+}
+EXPORT_SYMBOL_GPL(usb_register_dev);
+
+/**
+ * usb_deregister_dev - deregister a USB device's dynamic minor.
+ * @intf: pointer to the usb_interface that is being deregistered
+ * @class_driver: pointer to the usb_class_driver for this device
+ *
+ * Used in conjunction with usb_register_dev().  This function is called
+ * when the USB driver is finished with the minor numbers gotten from a
+ * call to usb_register_dev() (usually when the device is disconnected
+ * from the system.)
+ *
+ * This function also removes the usb class device from the sysfs tree.
+ *
+ * This should be called by all drivers that use the USB major number.
+ */
+void usb_deregister_dev(struct usb_interface *intf,
+			struct usb_class_driver *class_driver)
+{
+	if (intf->minor == -1)
+		return;
+
+	dev_dbg(&intf->dev, "removing %d minor\n", intf->minor);
+	device_destroy(usb_class->class, MKDEV(USB_MAJOR, intf->minor));
+
+	down_write(&minor_rwsem);
+	usb_minors[intf->minor] = NULL;
+	up_write(&minor_rwsem);
+
+	intf->usb_dev = NULL;
+	intf->minor = -1;
+	destroy_usb_class();
+}
+EXPORT_SYMBOL_GPL(usb_deregister_dev);