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, 266 insertions, 0 deletions

diff --git a/drivers/s390/net/fsm.h b/drivers/s390/net/fsm.h
new file mode 100644
index 000000000..16dc071a2
--- /dev/null
+++ b/drivers/s390/net/fsm.h
@@ -0,0 +1,266 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef _FSM_H_
+#define _FSM_H_
+
+#include <linux/kernel.h>
+#include <linux/types.h>
+#include <linux/timer.h>
+#include <linux/time.h>
+#include <linux/slab.h>
+#include <linux/sched.h>
+#include <linux/string.h>
+#include <linux/atomic.h>
+
+/**
+ * Define this to get debugging messages.
+ */
+#define FSM_DEBUG         0
+
+/**
+ * Define this to get debugging massages for
+ * timer handling.
+ */
+#define FSM_TIMER_DEBUG   0
+
+/**
+ * Define these to record a history of
+ * Events/Statechanges and print it if a
+ * action_function is not found.
+ */
+#define FSM_DEBUG_HISTORY 0
+#define FSM_HISTORY_SIZE  40
+
+struct fsm_instance_t;
+
+/**
+ * Definition of an action function, called by a FSM
+ */
+typedef void (*fsm_function_t)(struct fsm_instance_t *, int, void *);
+
+/**
+ * Internal jump table for a FSM
+ */
+typedef struct {
+	fsm_function_t *jumpmatrix;
+	int nr_events;
+	int nr_states;
+	const char **event_names;
+	const char **state_names;
+} fsm;
+
+#if FSM_DEBUG_HISTORY
+/**
+ * Element of State/Event history used for debugging.
+ */
+typedef struct {
+	int state;
+	int event;
+} fsm_history;
+#endif
+
+/**
+ * Representation of a FSM
+ */
+typedef struct fsm_instance_t {
+	fsm *f;
+	atomic_t state;
+	char name[16];
+	void *userdata;
+	int userint;
+	wait_queue_head_t wait_q;
+#if FSM_DEBUG_HISTORY
+	int         history_index;
+	int         history_size;
+	fsm_history history[FSM_HISTORY_SIZE];
+#endif
+} fsm_instance;
+
+/**
+ * Description of a state-event combination
+ */
+typedef struct {
+	int cond_state;
+	int cond_event;
+	fsm_function_t function;
+} fsm_node;
+
+/**
+ * Description of a FSM Timer.
+ */
+typedef struct {
+	fsm_instance *fi;
+	struct timer_list tl;
+	int expire_event;
+	void *event_arg;
+} fsm_timer;
+
+/**
+ * Creates an FSM
+ *
+ * @param name        Name of this instance for logging purposes.
+ * @param state_names An array of names for all states for logging purposes.
+ * @param event_names An array of names for all events for logging purposes.
+ * @param nr_states   Number of states for this instance.
+ * @param nr_events   Number of events for this instance.
+ * @param tmpl        An array of fsm_nodes, describing this FSM.
+ * @param tmpl_len    Length of the describing array.
+ * @param order       Parameter for allocation of the FSM data structs.
+ */
+extern fsm_instance *
+init_fsm(char *name, const char **state_names,
+	 const char **event_names,
+	 int nr_states, int nr_events, const fsm_node *tmpl,
+	 int tmpl_len, gfp_t order);
+
+/**
+ * Releases an FSM
+ *
+ * @param fi Pointer to an FSM, previously created with init_fsm.
+ */
+extern void kfree_fsm(fsm_instance *fi);
+
+#if FSM_DEBUG_HISTORY
+extern void
+fsm_print_history(fsm_instance *fi);
+
+extern void
+fsm_record_history(fsm_instance *fi, int state, int event);
+#endif
+
+/**
+ * Emits an event to a FSM.
+ * If an action function is defined for the current state/event combination,
+ * this function is called.
+ *
+ * @param fi    Pointer to FSM which should receive the event.
+ * @param event The event do be delivered.
+ * @param arg   A generic argument, handed to the action function.
+ *
+ * @return      0  on success,
+ *              1  if current state or event is out of range
+ *              !0 if state and event in range, but no action defined.
+ */
+static inline int
+fsm_event(fsm_instance *fi, int event, void *arg)
+{
+	fsm_function_t r;
+	int state = atomic_read(&fi->state);
+
+	if ((state >= fi->f->nr_states) ||
+	    (event >= fi->f->nr_events)       ) {
+		printk(KERN_ERR "fsm(%s): Invalid state st(%ld/%ld) ev(%d/%ld)\n",
+			fi->name, (long)state,(long)fi->f->nr_states, event,
+			(long)fi->f->nr_events);
+#if FSM_DEBUG_HISTORY
+		fsm_print_history(fi);
+#endif
+		return 1;
+	}
+	r = fi->f->jumpmatrix[fi->f->nr_states * event + state];
+	if (r) {
+#if FSM_DEBUG
+		printk(KERN_DEBUG "fsm(%s): state %s event %s\n",
+		       fi->name, fi->f->state_names[state],
+		       fi->f->event_names[event]);
+#endif
+#if FSM_DEBUG_HISTORY
+		fsm_record_history(fi, state, event);
+#endif
+		r(fi, event, arg);
+		return 0;
+	} else {
+#if FSM_DEBUG || FSM_DEBUG_HISTORY
+		printk(KERN_DEBUG "fsm(%s): no function for event %s in state %s\n",
+		       fi->name, fi->f->event_names[event],
+		       fi->f->state_names[state]);
+#endif
+#if FSM_DEBUG_HISTORY
+		fsm_print_history(fi);
+#endif
+		return !0;
+	}
+}
+
+/**
+ * Modifies the state of an FSM.
+ * This does <em>not</em> trigger an event or calls an action function.
+ *
+ * @param fi    Pointer to FSM
+ * @param state The new state for this FSM.
+ */
+static inline void
+fsm_newstate(fsm_instance *fi, int newstate)
+{
+	atomic_set(&fi->state,newstate);
+#if FSM_DEBUG_HISTORY
+	fsm_record_history(fi, newstate, -1);
+#endif
+#if FSM_DEBUG
+	printk(KERN_DEBUG "fsm(%s): New state %s\n", fi->name,
+		fi->f->state_names[newstate]);
+#endif
+	wake_up(&fi->wait_q);
+}
+
+/**
+ * Retrieves the state of an FSM
+ *
+ * @param fi Pointer to FSM
+ *
+ * @return The current state of the FSM.
+ */
+static inline int
+fsm_getstate(fsm_instance *fi)
+{
+	return atomic_read(&fi->state);
+}
+
+/**
+ * Retrieves the name of the state of an FSM
+ *
+ * @param fi Pointer to FSM
+ *
+ * @return The current state of the FSM in a human readable form.
+ */
+extern const char *fsm_getstate_str(fsm_instance *fi);
+
+/**
+ * Initializes a timer for an FSM.
+ * This prepares an fsm_timer for usage with fsm_addtimer.
+ *
+ * @param fi    Pointer to FSM
+ * @param timer The timer to be initialized.
+ */
+extern void fsm_settimer(fsm_instance *fi, fsm_timer *);
+
+/**
+ * Clears a pending timer of an FSM instance.
+ *
+ * @param timer The timer to clear.
+ */
+extern void fsm_deltimer(fsm_timer *timer);
+
+/**
+ * Adds and starts a timer to an FSM instance.
+ *
+ * @param timer    The timer to be added. The field fi of that timer
+ *                 must have been set to point to the instance.
+ * @param millisec Duration, after which the timer should expire.
+ * @param event    Event, to trigger if timer expires.
+ * @param arg      Generic argument, provided to expiry function.
+ *
+ * @return         0 on success, -1 if timer is already active.
+ */
+extern int fsm_addtimer(fsm_timer *timer, int millisec, int event, void *arg);
+
+/**
+ * Modifies a timer of an FSM.
+ *
+ * @param timer    The timer to modify.
+ * @param millisec Duration, after which the timer should expire.
+ * @param event    Event, to trigger if timer expires.
+ * @param arg      Generic argument, provided to expiry function.
+ */
+extern void fsm_modtimer(fsm_timer *timer, int millisec, int event, void *arg);
+
+#endif /* _FSM_H_ */