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, 349 insertions, 0 deletions

diff --git a/tools/perf/util/bpf_kwork.c b/tools/perf/util/bpf_kwork.c
new file mode 100644
index 000000000..6eb2c78fd
--- /dev/null
+++ b/tools/perf/util/bpf_kwork.c
@@ -0,0 +1,349 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * bpf_kwork.c
+ *
+ * Copyright (c) 2022  Huawei Inc,  Yang Jihong <yangjihong1@huawei.com>
+ */
+
+#include <time.h>
+#include <fcntl.h>
+#include <signal.h>
+#include <stdio.h>
+#include <unistd.h>
+
+#include <linux/time64.h>
+
+#include "util/debug.h"
+#include "util/evsel.h"
+#include "util/kwork.h"
+
+#include <bpf/bpf.h>
+#include <perf/cpumap.h>
+
+#include "util/bpf_skel/kwork_trace.skel.h"
+
+/*
+ * This should be in sync with "util/kwork_trace.bpf.c"
+ */
+#define MAX_KWORKNAME 128
+
+struct work_key {
+	u32 type;
+	u32 cpu;
+	u64 id;
+};
+
+struct report_data {
+	u64 nr;
+	u64 total_time;
+	u64 max_time;
+	u64 max_time_start;
+	u64 max_time_end;
+};
+
+struct kwork_class_bpf {
+	struct kwork_class *class;
+
+	void (*load_prepare)(struct perf_kwork *kwork);
+	int  (*get_work_name)(struct work_key *key, char **ret_name);
+};
+
+static struct kwork_trace_bpf *skel;
+
+static struct timespec ts_start;
+static struct timespec ts_end;
+
+void perf_kwork__trace_start(void)
+{
+	clock_gettime(CLOCK_MONOTONIC, &ts_start);
+	skel->bss->enabled = 1;
+}
+
+void perf_kwork__trace_finish(void)
+{
+	clock_gettime(CLOCK_MONOTONIC, &ts_end);
+	skel->bss->enabled = 0;
+}
+
+static int get_work_name_from_map(struct work_key *key, char **ret_name)
+{
+	char name[MAX_KWORKNAME] = { 0 };
+	int fd = bpf_map__fd(skel->maps.perf_kwork_names);
+
+	*ret_name = NULL;
+
+	if (fd < 0) {
+		pr_debug("Invalid names map fd\n");
+		return 0;
+	}
+
+	if ((bpf_map_lookup_elem(fd, key, name) == 0) && (strlen(name) != 0)) {
+		*ret_name = strdup(name);
+		if (*ret_name == NULL) {
+			pr_err("Failed to copy work name\n");
+			return -1;
+		}
+	}
+
+	return 0;
+}
+
+static void irq_load_prepare(struct perf_kwork *kwork)
+{
+	if (kwork->report == KWORK_REPORT_RUNTIME) {
+		bpf_program__set_autoload(skel->progs.report_irq_handler_entry, true);
+		bpf_program__set_autoload(skel->progs.report_irq_handler_exit, true);
+	}
+}
+
+static struct kwork_class_bpf kwork_irq_bpf = {
+	.load_prepare  = irq_load_prepare,
+	.get_work_name = get_work_name_from_map,
+};
+
+static void softirq_load_prepare(struct perf_kwork *kwork)
+{
+	if (kwork->report == KWORK_REPORT_RUNTIME) {
+		bpf_program__set_autoload(skel->progs.report_softirq_entry, true);
+		bpf_program__set_autoload(skel->progs.report_softirq_exit, true);
+	} else if (kwork->report == KWORK_REPORT_LATENCY) {
+		bpf_program__set_autoload(skel->progs.latency_softirq_raise, true);
+		bpf_program__set_autoload(skel->progs.latency_softirq_entry, true);
+	}
+}
+
+static struct kwork_class_bpf kwork_softirq_bpf = {
+	.load_prepare  = softirq_load_prepare,
+	.get_work_name = get_work_name_from_map,
+};
+
+static void workqueue_load_prepare(struct perf_kwork *kwork)
+{
+	if (kwork->report == KWORK_REPORT_RUNTIME) {
+		bpf_program__set_autoload(skel->progs.report_workqueue_execute_start, true);
+		bpf_program__set_autoload(skel->progs.report_workqueue_execute_end, true);
+	} else if (kwork->report == KWORK_REPORT_LATENCY) {
+		bpf_program__set_autoload(skel->progs.latency_workqueue_activate_work, true);
+		bpf_program__set_autoload(skel->progs.latency_workqueue_execute_start, true);
+	}
+}
+
+static struct kwork_class_bpf kwork_workqueue_bpf = {
+	.load_prepare  = workqueue_load_prepare,
+	.get_work_name = get_work_name_from_map,
+};
+
+static struct kwork_class_bpf *
+kwork_class_bpf_supported_list[KWORK_CLASS_MAX] = {
+	[KWORK_CLASS_IRQ]       = &kwork_irq_bpf,
+	[KWORK_CLASS_SOFTIRQ]   = &kwork_softirq_bpf,
+	[KWORK_CLASS_WORKQUEUE] = &kwork_workqueue_bpf,
+};
+
+static bool valid_kwork_class_type(enum kwork_class_type type)
+{
+	return type >= 0 && type < KWORK_CLASS_MAX ? true : false;
+}
+
+static int setup_filters(struct perf_kwork *kwork)
+{
+	u8 val = 1;
+	int i, nr_cpus, key, fd;
+	struct perf_cpu_map *map;
+
+	if (kwork->cpu_list != NULL) {
+		fd = bpf_map__fd(skel->maps.perf_kwork_cpu_filter);
+		if (fd < 0) {
+			pr_debug("Invalid cpu filter fd\n");
+			return -1;
+		}
+
+		map = perf_cpu_map__new(kwork->cpu_list);
+		if (map == NULL) {
+			pr_debug("Invalid cpu_list\n");
+			return -1;
+		}
+
+		nr_cpus = libbpf_num_possible_cpus();
+		for (i = 0; i < perf_cpu_map__nr(map); i++) {
+			struct perf_cpu cpu = perf_cpu_map__cpu(map, i);
+
+			if (cpu.cpu >= nr_cpus) {
+				perf_cpu_map__put(map);
+				pr_err("Requested cpu %d too large\n", cpu.cpu);
+				return -1;
+			}
+			bpf_map_update_elem(fd, &cpu.cpu, &val, BPF_ANY);
+		}
+		perf_cpu_map__put(map);
+
+		skel->bss->has_cpu_filter = 1;
+	}
+
+	if (kwork->profile_name != NULL) {
+		if (strlen(kwork->profile_name) >= MAX_KWORKNAME) {
+			pr_err("Requested name filter %s too large, limit to %d\n",
+			       kwork->profile_name, MAX_KWORKNAME - 1);
+			return -1;
+		}
+
+		fd = bpf_map__fd(skel->maps.perf_kwork_name_filter);
+		if (fd < 0) {
+			pr_debug("Invalid name filter fd\n");
+			return -1;
+		}
+
+		key = 0;
+		bpf_map_update_elem(fd, &key, kwork->profile_name, BPF_ANY);
+
+		skel->bss->has_name_filter = 1;
+	}
+
+	return 0;
+}
+
+int perf_kwork__trace_prepare_bpf(struct perf_kwork *kwork)
+{
+	struct bpf_program *prog;
+	struct kwork_class *class;
+	struct kwork_class_bpf *class_bpf;
+	enum kwork_class_type type;
+
+	skel = kwork_trace_bpf__open();
+	if (!skel) {
+		pr_debug("Failed to open kwork trace skeleton\n");
+		return -1;
+	}
+
+	/*
+	 * set all progs to non-autoload,
+	 * then set corresponding progs according to config
+	 */
+	bpf_object__for_each_program(prog, skel->obj)
+		bpf_program__set_autoload(prog, false);
+
+	list_for_each_entry(class, &kwork->class_list, list) {
+		type = class->type;
+		if (!valid_kwork_class_type(type) ||
+		    (kwork_class_bpf_supported_list[type] == NULL)) {
+			pr_err("Unsupported bpf trace class %s\n", class->name);
+			goto out;
+		}
+
+		class_bpf = kwork_class_bpf_supported_list[type];
+		class_bpf->class = class;
+
+		if (class_bpf->load_prepare != NULL)
+			class_bpf->load_prepare(kwork);
+	}
+
+	if (kwork_trace_bpf__load(skel)) {
+		pr_debug("Failed to load kwork trace skeleton\n");
+		goto out;
+	}
+
+	if (setup_filters(kwork))
+		goto out;
+
+	if (kwork_trace_bpf__attach(skel)) {
+		pr_debug("Failed to attach kwork trace skeleton\n");
+		goto out;
+	}
+
+	return 0;
+
+out:
+	kwork_trace_bpf__destroy(skel);
+	return -1;
+}
+
+static int add_work(struct perf_kwork *kwork,
+		    struct work_key *key,
+		    struct report_data *data)
+{
+	struct kwork_work *work;
+	struct kwork_class_bpf *bpf_trace;
+	struct kwork_work tmp = {
+		.id = key->id,
+		.name = NULL,
+		.cpu = key->cpu,
+	};
+	enum kwork_class_type type = key->type;
+
+	if (!valid_kwork_class_type(type)) {
+		pr_debug("Invalid class type %d to add work\n", type);
+		return -1;
+	}
+
+	bpf_trace = kwork_class_bpf_supported_list[type];
+	tmp.class = bpf_trace->class;
+
+	if ((bpf_trace->get_work_name != NULL) &&
+	    (bpf_trace->get_work_name(key, &tmp.name)))
+		return -1;
+
+	work = perf_kwork_add_work(kwork, tmp.class, &tmp);
+	if (work == NULL)
+		return -1;
+
+	if (kwork->report == KWORK_REPORT_RUNTIME) {
+		work->nr_atoms = data->nr;
+		work->total_runtime = data->total_time;
+		work->max_runtime = data->max_time;
+		work->max_runtime_start = data->max_time_start;
+		work->max_runtime_end = data->max_time_end;
+	} else if (kwork->report == KWORK_REPORT_LATENCY) {
+		work->nr_atoms = data->nr;
+		work->total_latency = data->total_time;
+		work->max_latency = data->max_time;
+		work->max_latency_start = data->max_time_start;
+		work->max_latency_end = data->max_time_end;
+	} else {
+		pr_debug("Invalid bpf report type %d\n", kwork->report);
+		return -1;
+	}
+
+	kwork->timestart = (u64)ts_start.tv_sec * NSEC_PER_SEC + ts_start.tv_nsec;
+	kwork->timeend = (u64)ts_end.tv_sec * NSEC_PER_SEC + ts_end.tv_nsec;
+
+	return 0;
+}
+
+int perf_kwork__report_read_bpf(struct perf_kwork *kwork)
+{
+	struct report_data data;
+	struct work_key key = {
+		.type = 0,
+		.cpu  = 0,
+		.id   = 0,
+	};
+	struct work_key prev = {
+		.type = 0,
+		.cpu  = 0,
+		.id   = 0,
+	};
+	int fd = bpf_map__fd(skel->maps.perf_kwork_report);
+
+	if (fd < 0) {
+		pr_debug("Invalid report fd\n");
+		return -1;
+	}
+
+	while (!bpf_map_get_next_key(fd, &prev, &key)) {
+		if ((bpf_map_lookup_elem(fd, &key, &data)) != 0) {
+			pr_debug("Failed to lookup report elem\n");
+			return -1;
+		}
+
+		if ((data.nr != 0) && (add_work(kwork, &key, &data) != 0))
+			return -1;
+
+		prev = key;
+	}
+	return 0;
+}
+
+void perf_kwork__report_cleanup_bpf(void)
+{
+	kwork_trace_bpf__destroy(skel);
+}