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, 171 insertions, 0 deletions

diff --git a/drivers/s390/cio/cio_inject.c b/drivers/s390/cio/cio_inject.c
new file mode 100644
index 000000000..8613fa937
--- /dev/null
+++ b/drivers/s390/cio/cio_inject.c
@@ -0,0 +1,171 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ *   CIO inject interface
+ *
+ *    Copyright IBM Corp. 2021
+ *    Author(s): Vineeth Vijayan <vneethv@linux.ibm.com>
+ */
+
+#define KMSG_COMPONENT "cio"
+#define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
+
+#include <linux/slab.h>
+#include <linux/spinlock.h>
+#include <linux/mm.h>
+#include <linux/debugfs.h>
+#include <asm/chpid.h>
+
+#include "cio_inject.h"
+#include "cio_debug.h"
+
+static DEFINE_SPINLOCK(crw_inject_lock);
+DEFINE_STATIC_KEY_FALSE(cio_inject_enabled);
+static struct crw *crw_inject_data;
+
+/**
+ * crw_inject : Initiate the artificial CRW inject
+ * @crw: The data which needs to be injected as new CRW.
+ *
+ * The CRW handler is called, which will use the provided artificial
+ * data instead of the CRW from the underlying hardware.
+ *
+ * Return: 0 on success
+ */
+static int crw_inject(struct crw *crw)
+{
+	int rc = 0;
+	struct crw *copy;
+	unsigned long flags;
+
+	copy = kmemdup(crw, sizeof(*crw), GFP_KERNEL);
+	if (!copy)
+		return -ENOMEM;
+
+	spin_lock_irqsave(&crw_inject_lock, flags);
+	if (crw_inject_data) {
+		kfree(copy);
+		rc = -EBUSY;
+	} else {
+		crw_inject_data = copy;
+	}
+	spin_unlock_irqrestore(&crw_inject_lock, flags);
+
+	if (!rc)
+		crw_handle_channel_report();
+
+	return rc;
+}
+
+/**
+ * stcrw_get_injected: Copy the artificial CRW data to CRW struct.
+ * @crw: The target CRW pointer.
+ *
+ * Retrieve an injected CRW data. Return 0 on success, 1 if no
+ * injected-CRW is available. The function reproduces the return
+ * code of the actual STCRW function.
+ */
+int stcrw_get_injected(struct crw *crw)
+{
+	int rc = 1;
+	unsigned long flags;
+
+	spin_lock_irqsave(&crw_inject_lock, flags);
+	if (crw_inject_data) {
+		memcpy(crw, crw_inject_data, sizeof(*crw));
+		kfree(crw_inject_data);
+		crw_inject_data = NULL;
+		rc = 0;
+	}
+	spin_unlock_irqrestore(&crw_inject_lock, flags);
+
+	return rc;
+}
+
+/* The debugfs write handler for crw_inject nodes operation */
+static ssize_t crw_inject_write(struct file *file, const char __user *buf,
+				size_t lbuf, loff_t *ppos)
+{
+	u32 slct, oflw, chn, rsc, anc, erc, rsid;
+	struct crw crw;
+	char *buffer;
+	int rc;
+
+	if (!static_branch_likely(&cio_inject_enabled)) {
+		pr_warn("CIO inject is not enabled - ignoring CRW inject\n");
+		return -EINVAL;
+	}
+
+	buffer = vmemdup_user(buf, lbuf);
+	if (IS_ERR(buffer))
+		return -ENOMEM;
+
+	rc = sscanf(buffer, "%x %x %x %x %x %x %x", &slct, &oflw, &chn, &rsc, &anc,
+		    &erc, &rsid);
+
+	kvfree(buffer);
+	if (rc != 7) {
+		pr_warn("crw_inject: Invalid format (need <solicited> <overflow> <chaining> <rsc> <ancillary> <erc> <rsid>)\n");
+		return -EINVAL;
+	}
+
+	memset(&crw, 0, sizeof(crw));
+	crw.slct = slct;
+	crw.oflw = oflw;
+	crw.chn = chn;
+	crw.rsc = rsc;
+	crw.anc = anc;
+	crw.erc = erc;
+	crw.rsid = rsid;
+
+	rc = crw_inject(&crw);
+	if (rc)
+		return rc;
+
+	return lbuf;
+}
+
+/* Debugfs write handler for inject_enable node*/
+static ssize_t enable_inject_write(struct file *file, const char __user *buf,
+				   size_t lbuf, loff_t *ppos)
+{
+	unsigned long en = 0;
+	int rc;
+
+	rc = kstrtoul_from_user(buf, lbuf, 10, &en);
+	if (rc)
+		return rc;
+
+	switch (en) {
+	case 0:
+		static_branch_disable(&cio_inject_enabled);
+		break;
+	case 1:
+		static_branch_enable(&cio_inject_enabled);
+		break;
+	}
+
+	return lbuf;
+}
+
+static const struct file_operations crw_fops = {
+	.owner = THIS_MODULE,
+	.write = crw_inject_write,
+};
+
+static const struct file_operations cio_en_fops = {
+	.owner = THIS_MODULE,
+	.write = enable_inject_write,
+};
+
+static int __init cio_inject_init(void)
+{
+	/* enable_inject node enables the static branching */
+	debugfs_create_file("enable_inject", 0200, cio_debugfs_dir,
+			    NULL, &cio_en_fops);
+
+	debugfs_create_file("crw_inject", 0200, cio_debugfs_dir,
+			    NULL, &crw_fops);
+	return 0;
+}
+
+device_initcall(cio_inject_init);