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, 270 insertions, 0 deletions

diff --git a/drivers/leds/trigger/ledtrig-activity.c b/drivers/leds/trigger/ledtrig-activity.c
new file mode 100644
index 000000000..33cbf8413
--- /dev/null
+++ b/drivers/leds/trigger/ledtrig-activity.c
@@ -0,0 +1,270 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Activity LED trigger
+ *
+ * Copyright (C) 2017 Willy Tarreau <w@1wt.eu>
+ * Partially based on Atsushi Nemoto's ledtrig-heartbeat.c.
+ */
+
+#include <linux/init.h>
+#include <linux/kernel.h>
+#include <linux/kernel_stat.h>
+#include <linux/leds.h>
+#include <linux/module.h>
+#include <linux/panic_notifier.h>
+#include <linux/reboot.h>
+#include <linux/sched.h>
+#include <linux/slab.h>
+#include <linux/timer.h>
+#include "../leds.h"
+
+static int panic_detected;
+
+struct activity_data {
+	struct timer_list timer;
+	struct led_classdev *led_cdev;
+	u64 last_used;
+	u64 last_boot;
+	int time_left;
+	int state;
+	int invert;
+};
+
+static void led_activity_function(struct timer_list *t)
+{
+	struct activity_data *activity_data = from_timer(activity_data, t,
+							 timer);
+	struct led_classdev *led_cdev = activity_data->led_cdev;
+	unsigned int target;
+	unsigned int usage;
+	int delay;
+	u64 curr_used;
+	u64 curr_boot;
+	s32 diff_used;
+	s32 diff_boot;
+	int cpus;
+	int i;
+
+	if (test_and_clear_bit(LED_BLINK_BRIGHTNESS_CHANGE, &led_cdev->work_flags))
+		led_cdev->blink_brightness = led_cdev->new_blink_brightness;
+
+	if (unlikely(panic_detected)) {
+		/* full brightness in case of panic */
+		led_set_brightness_nosleep(led_cdev, led_cdev->blink_brightness);
+		return;
+	}
+
+	cpus = 0;
+	curr_used = 0;
+
+	for_each_possible_cpu(i) {
+		struct kernel_cpustat kcpustat;
+
+		kcpustat_cpu_fetch(&kcpustat, i);
+
+		curr_used += kcpustat.cpustat[CPUTIME_USER]
+			  +  kcpustat.cpustat[CPUTIME_NICE]
+			  +  kcpustat.cpustat[CPUTIME_SYSTEM]
+			  +  kcpustat.cpustat[CPUTIME_SOFTIRQ]
+			  +  kcpustat.cpustat[CPUTIME_IRQ];
+		cpus++;
+	}
+
+	/* We come here every 100ms in the worst case, so that's 100M ns of
+	 * cumulated time. By dividing by 2^16, we get the time resolution
+	 * down to 16us, ensuring we won't overflow 32-bit computations below
+	 * even up to 3k CPUs, while keeping divides cheap on smaller systems.
+	 */
+	curr_boot = ktime_get_boottime_ns() * cpus;
+	diff_boot = (curr_boot - activity_data->last_boot) >> 16;
+	diff_used = (curr_used - activity_data->last_used) >> 16;
+	activity_data->last_boot = curr_boot;
+	activity_data->last_used = curr_used;
+
+	if (diff_boot <= 0 || diff_used < 0)
+		usage = 0;
+	else if (diff_used >= diff_boot)
+		usage = 100;
+	else
+		usage = 100 * diff_used / diff_boot;
+
+	/*
+	 * Now we know the total boot_time multiplied by the number of CPUs, and
+	 * the total idle+wait time for all CPUs. We'll compare how they evolved
+	 * since last call. The % of overall CPU usage is :
+	 *
+	 *      1 - delta_idle / delta_boot
+	 *
+	 * What we want is that when the CPU usage is zero, the LED must blink
+	 * slowly with very faint flashes that are detectable but not disturbing
+	 * (typically 10ms every second, or 10ms ON, 990ms OFF). Then we want
+	 * blinking frequency to increase up to the point where the load is
+	 * enough to saturate one core in multi-core systems or 50% in single
+	 * core systems. At this point it should reach 10 Hz with a 10/90 duty
+	 * cycle (10ms ON, 90ms OFF). After this point, the blinking frequency
+	 * remains stable (10 Hz) and only the duty cycle increases to report
+	 * the activity, up to the point where we have 90ms ON, 10ms OFF when
+	 * all cores are saturated. It's important that the LED never stays in
+	 * a steady state so that it's easy to distinguish an idle or saturated
+	 * machine from a hung one.
+	 *
+	 * This gives us :
+	 *   - a target CPU usage of min(50%, 100%/#CPU) for a 10% duty cycle
+	 *     (10ms ON, 90ms OFF)
+	 *   - below target :
+	 *      ON_ms  = 10
+	 *      OFF_ms = 90 + (1 - usage/target) * 900
+	 *   - above target :
+	 *      ON_ms  = 10 + (usage-target)/(100%-target) * 80
+	 *      OFF_ms = 90 - (usage-target)/(100%-target) * 80
+	 *
+	 * In order to keep a good responsiveness, we cap the sleep time to
+	 * 100 ms and keep track of the sleep time left. This allows us to
+	 * quickly change it if needed.
+	 */
+
+	activity_data->time_left -= 100;
+	if (activity_data->time_left <= 0) {
+		activity_data->time_left = 0;
+		activity_data->state = !activity_data->state;
+		led_set_brightness_nosleep(led_cdev,
+			(activity_data->state ^ activity_data->invert) ?
+			led_cdev->blink_brightness : LED_OFF);
+	}
+
+	target = (cpus > 1) ? (100 / cpus) : 50;
+
+	if (usage < target)
+		delay = activity_data->state ?
+			10 :                        /* ON  */
+			990 - 900 * usage / target; /* OFF */
+	else
+		delay = activity_data->state ?
+			10 + 80 * (usage - target) / (100 - target) : /* ON  */
+			90 - 80 * (usage - target) / (100 - target);  /* OFF */
+
+
+	if (!activity_data->time_left || delay <= activity_data->time_left)
+		activity_data->time_left = delay;
+
+	delay = min_t(int, activity_data->time_left, 100);
+	mod_timer(&activity_data->timer, jiffies + msecs_to_jiffies(delay));
+}
+
+static ssize_t led_invert_show(struct device *dev,
+                               struct device_attribute *attr, char *buf)
+{
+	struct activity_data *activity_data = led_trigger_get_drvdata(dev);
+
+	return sprintf(buf, "%u\n", activity_data->invert);
+}
+
+static ssize_t led_invert_store(struct device *dev,
+                                struct device_attribute *attr,
+                                const char *buf, size_t size)
+{
+	struct activity_data *activity_data = led_trigger_get_drvdata(dev);
+	unsigned long state;
+	int ret;
+
+	ret = kstrtoul(buf, 0, &state);
+	if (ret)
+		return ret;
+
+	activity_data->invert = !!state;
+
+	return size;
+}
+
+static DEVICE_ATTR(invert, 0644, led_invert_show, led_invert_store);
+
+static struct attribute *activity_led_attrs[] = {
+	&dev_attr_invert.attr,
+	NULL
+};
+ATTRIBUTE_GROUPS(activity_led);
+
+static int activity_activate(struct led_classdev *led_cdev)
+{
+	struct activity_data *activity_data;
+
+	activity_data = kzalloc(sizeof(*activity_data), GFP_KERNEL);
+	if (!activity_data)
+		return -ENOMEM;
+
+	led_set_trigger_data(led_cdev, activity_data);
+
+	activity_data->led_cdev = led_cdev;
+	timer_setup(&activity_data->timer, led_activity_function, 0);
+	if (!led_cdev->blink_brightness)
+		led_cdev->blink_brightness = led_cdev->max_brightness;
+	led_activity_function(&activity_data->timer);
+	set_bit(LED_BLINK_SW, &led_cdev->work_flags);
+
+	return 0;
+}
+
+static void activity_deactivate(struct led_classdev *led_cdev)
+{
+	struct activity_data *activity_data = led_get_trigger_data(led_cdev);
+
+	timer_shutdown_sync(&activity_data->timer);
+	kfree(activity_data);
+	clear_bit(LED_BLINK_SW, &led_cdev->work_flags);
+}
+
+static struct led_trigger activity_led_trigger = {
+	.name       = "activity",
+	.activate   = activity_activate,
+	.deactivate = activity_deactivate,
+	.groups     = activity_led_groups,
+};
+
+static int activity_reboot_notifier(struct notifier_block *nb,
+                                    unsigned long code, void *unused)
+{
+	led_trigger_unregister(&activity_led_trigger);
+	return NOTIFY_DONE;
+}
+
+static int activity_panic_notifier(struct notifier_block *nb,
+                                   unsigned long code, void *unused)
+{
+	panic_detected = 1;
+	return NOTIFY_DONE;
+}
+
+static struct notifier_block activity_reboot_nb = {
+	.notifier_call = activity_reboot_notifier,
+};
+
+static struct notifier_block activity_panic_nb = {
+	.notifier_call = activity_panic_notifier,
+};
+
+static int __init activity_init(void)
+{
+	int rc = led_trigger_register(&activity_led_trigger);
+
+	if (!rc) {
+		atomic_notifier_chain_register(&panic_notifier_list,
+					       &activity_panic_nb);
+		register_reboot_notifier(&activity_reboot_nb);
+	}
+	return rc;
+}
+
+static void __exit activity_exit(void)
+{
+	unregister_reboot_notifier(&activity_reboot_nb);
+	atomic_notifier_chain_unregister(&panic_notifier_list,
+					 &activity_panic_nb);
+	led_trigger_unregister(&activity_led_trigger);
+}
+
+module_init(activity_init);
+module_exit(activity_exit);
+
+MODULE_AUTHOR("Willy Tarreau <w@1wt.eu>");
+MODULE_DESCRIPTION("Activity LED trigger");
+MODULE_LICENSE("GPL v2");