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, 278 insertions, 0 deletions

diff --git a/net/core/gen_estimator.c b/net/core/gen_estimator.c
new file mode 100644
index 000000000..fae9c4694
--- /dev/null
+++ b/net/core/gen_estimator.c
@@ -0,0 +1,278 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * net/sched/gen_estimator.c	Simple rate estimator.
+ *
+ * Authors:	Alexey Kuznetsov, <kuznet@ms2.inr.ac.ru>
+ *		Eric Dumazet <edumazet@google.com>
+ *
+ * Changes:
+ *              Jamal Hadi Salim - moved it to net/core and reshulfed
+ *              names to make it usable in general net subsystem.
+ */
+
+#include <linux/uaccess.h>
+#include <linux/bitops.h>
+#include <linux/module.h>
+#include <linux/types.h>
+#include <linux/kernel.h>
+#include <linux/jiffies.h>
+#include <linux/string.h>
+#include <linux/mm.h>
+#include <linux/socket.h>
+#include <linux/sockios.h>
+#include <linux/in.h>
+#include <linux/errno.h>
+#include <linux/interrupt.h>
+#include <linux/netdevice.h>
+#include <linux/skbuff.h>
+#include <linux/rtnetlink.h>
+#include <linux/init.h>
+#include <linux/slab.h>
+#include <linux/seqlock.h>
+#include <net/sock.h>
+#include <net/gen_stats.h>
+
+/* This code is NOT intended to be used for statistics collection,
+ * its purpose is to provide a base for statistical multiplexing
+ * for controlled load service.
+ * If you need only statistics, run a user level daemon which
+ * periodically reads byte counters.
+ */
+
+struct net_rate_estimator {
+	struct gnet_stats_basic_sync	*bstats;
+	spinlock_t		*stats_lock;
+	bool			running;
+	struct gnet_stats_basic_sync __percpu *cpu_bstats;
+	u8			ewma_log;
+	u8			intvl_log; /* period : (250ms << intvl_log) */
+
+	seqcount_t		seq;
+	u64			last_packets;
+	u64			last_bytes;
+
+	u64			avpps;
+	u64			avbps;
+
+	unsigned long           next_jiffies;
+	struct timer_list       timer;
+	struct rcu_head		rcu;
+};
+
+static void est_fetch_counters(struct net_rate_estimator *e,
+			       struct gnet_stats_basic_sync *b)
+{
+	gnet_stats_basic_sync_init(b);
+	if (e->stats_lock)
+		spin_lock(e->stats_lock);
+
+	gnet_stats_add_basic(b, e->cpu_bstats, e->bstats, e->running);
+
+	if (e->stats_lock)
+		spin_unlock(e->stats_lock);
+
+}
+
+static void est_timer(struct timer_list *t)
+{
+	struct net_rate_estimator *est = from_timer(est, t, timer);
+	struct gnet_stats_basic_sync b;
+	u64 b_bytes, b_packets;
+	u64 rate, brate;
+
+	est_fetch_counters(est, &b);
+	b_bytes = u64_stats_read(&b.bytes);
+	b_packets = u64_stats_read(&b.packets);
+
+	brate = (b_bytes - est->last_bytes) << (10 - est->intvl_log);
+	brate = (brate >> est->ewma_log) - (est->avbps >> est->ewma_log);
+
+	rate = (b_packets - est->last_packets) << (10 - est->intvl_log);
+	rate = (rate >> est->ewma_log) - (est->avpps >> est->ewma_log);
+
+	write_seqcount_begin(&est->seq);
+	est->avbps += brate;
+	est->avpps += rate;
+	write_seqcount_end(&est->seq);
+
+	est->last_bytes = b_bytes;
+	est->last_packets = b_packets;
+
+	est->next_jiffies += ((HZ/4) << est->intvl_log);
+
+	if (unlikely(time_after_eq(jiffies, est->next_jiffies))) {
+		/* Ouch... timer was delayed. */
+		est->next_jiffies = jiffies + 1;
+	}
+	mod_timer(&est->timer, est->next_jiffies);
+}
+
+/**
+ * gen_new_estimator - create a new rate estimator
+ * @bstats: basic statistics
+ * @cpu_bstats: bstats per cpu
+ * @rate_est: rate estimator statistics
+ * @lock: lock for statistics and control path
+ * @running: true if @bstats represents a running qdisc, thus @bstats'
+ *           internal values might change during basic reads. Only used
+ *           if @bstats_cpu is NULL
+ * @opt: rate estimator configuration TLV
+ *
+ * Creates a new rate estimator with &bstats as source and &rate_est
+ * as destination. A new timer with the interval specified in the
+ * configuration TLV is created. Upon each interval, the latest statistics
+ * will be read from &bstats and the estimated rate will be stored in
+ * &rate_est with the statistics lock grabbed during this period.
+ *
+ * Returns 0 on success or a negative error code.
+ *
+ */
+int gen_new_estimator(struct gnet_stats_basic_sync *bstats,
+		      struct gnet_stats_basic_sync __percpu *cpu_bstats,
+		      struct net_rate_estimator __rcu **rate_est,
+		      spinlock_t *lock,
+		      bool running,
+		      struct nlattr *opt)
+{
+	struct gnet_estimator *parm = nla_data(opt);
+	struct net_rate_estimator *old, *est;
+	struct gnet_stats_basic_sync b;
+	int intvl_log;
+
+	if (nla_len(opt) < sizeof(*parm))
+		return -EINVAL;
+
+	/* allowed timer periods are :
+	 * -2 : 250ms,   -1 : 500ms,    0 : 1 sec
+	 *  1 : 2 sec,    2 : 4 sec,    3 : 8 sec
+	 */
+	if (parm->interval < -2 || parm->interval > 3)
+		return -EINVAL;
+
+	if (parm->ewma_log == 0 || parm->ewma_log >= 31)
+		return -EINVAL;
+
+	est = kzalloc(sizeof(*est), GFP_KERNEL);
+	if (!est)
+		return -ENOBUFS;
+
+	seqcount_init(&est->seq);
+	intvl_log = parm->interval + 2;
+	est->bstats = bstats;
+	est->stats_lock = lock;
+	est->running  = running;
+	est->ewma_log = parm->ewma_log;
+	est->intvl_log = intvl_log;
+	est->cpu_bstats = cpu_bstats;
+
+	if (lock)
+		local_bh_disable();
+	est_fetch_counters(est, &b);
+	if (lock)
+		local_bh_enable();
+	est->last_bytes = u64_stats_read(&b.bytes);
+	est->last_packets = u64_stats_read(&b.packets);
+
+	if (lock)
+		spin_lock_bh(lock);
+	old = rcu_dereference_protected(*rate_est, 1);
+	if (old) {
+		del_timer_sync(&old->timer);
+		est->avbps = old->avbps;
+		est->avpps = old->avpps;
+	}
+
+	est->next_jiffies = jiffies + ((HZ/4) << intvl_log);
+	timer_setup(&est->timer, est_timer, 0);
+	mod_timer(&est->timer, est->next_jiffies);
+
+	rcu_assign_pointer(*rate_est, est);
+	if (lock)
+		spin_unlock_bh(lock);
+	if (old)
+		kfree_rcu(old, rcu);
+	return 0;
+}
+EXPORT_SYMBOL(gen_new_estimator);
+
+/**
+ * gen_kill_estimator - remove a rate estimator
+ * @rate_est: rate estimator
+ *
+ * Removes the rate estimator.
+ *
+ */
+void gen_kill_estimator(struct net_rate_estimator __rcu **rate_est)
+{
+	struct net_rate_estimator *est;
+
+	est = xchg((__force struct net_rate_estimator **)rate_est, NULL);
+	if (est) {
+		timer_shutdown_sync(&est->timer);
+		kfree_rcu(est, rcu);
+	}
+}
+EXPORT_SYMBOL(gen_kill_estimator);
+
+/**
+ * gen_replace_estimator - replace rate estimator configuration
+ * @bstats: basic statistics
+ * @cpu_bstats: bstats per cpu
+ * @rate_est: rate estimator statistics
+ * @lock: lock for statistics and control path
+ * @running: true if @bstats represents a running qdisc, thus @bstats'
+ *           internal values might change during basic reads. Only used
+ *           if @cpu_bstats is NULL
+ * @opt: rate estimator configuration TLV
+ *
+ * Replaces the configuration of a rate estimator by calling
+ * gen_kill_estimator() and gen_new_estimator().
+ *
+ * Returns 0 on success or a negative error code.
+ */
+int gen_replace_estimator(struct gnet_stats_basic_sync *bstats,
+			  struct gnet_stats_basic_sync __percpu *cpu_bstats,
+			  struct net_rate_estimator __rcu **rate_est,
+			  spinlock_t *lock,
+			  bool running, struct nlattr *opt)
+{
+	return gen_new_estimator(bstats, cpu_bstats, rate_est,
+				 lock, running, opt);
+}
+EXPORT_SYMBOL(gen_replace_estimator);
+
+/**
+ * gen_estimator_active - test if estimator is currently in use
+ * @rate_est: rate estimator
+ *
+ * Returns true if estimator is active, and false if not.
+ */
+bool gen_estimator_active(struct net_rate_estimator __rcu **rate_est)
+{
+	return !!rcu_access_pointer(*rate_est);
+}
+EXPORT_SYMBOL(gen_estimator_active);
+
+bool gen_estimator_read(struct net_rate_estimator __rcu **rate_est,
+			struct gnet_stats_rate_est64 *sample)
+{
+	struct net_rate_estimator *est;
+	unsigned seq;
+
+	rcu_read_lock();
+	est = rcu_dereference(*rate_est);
+	if (!est) {
+		rcu_read_unlock();
+		return false;
+	}
+
+	do {
+		seq = read_seqcount_begin(&est->seq);
+		sample->bps = est->avbps >> 8;
+		sample->pps = est->avpps >> 8;
+	} while (read_seqcount_retry(&est->seq, seq));
+
+	rcu_read_unlock();
+	return true;
+}
+EXPORT_SYMBOL(gen_estimator_read);