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, 386 insertions, 0 deletions

diff --git a/net/ax25/ax25_out.c b/net/ax25/ax25_out.c
new file mode 100644
index 000000000..3db76d247
--- /dev/null
+++ b/net/ax25/ax25_out.c
@@ -0,0 +1,386 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ *
+ * Copyright (C) Alan Cox GW4PTS (alan@lxorguk.ukuu.org.uk)
+ * Copyright (C) Jonathan Naylor G4KLX (g4klx@g4klx.demon.co.uk)
+ * Copyright (C) Joerg Reuter DL1BKE (jreuter@yaina.de)
+ */
+#include <linux/errno.h>
+#include <linux/types.h>
+#include <linux/socket.h>
+#include <linux/in.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/timer.h>
+#include <linux/string.h>
+#include <linux/sockios.h>
+#include <linux/spinlock.h>
+#include <linux/net.h>
+#include <linux/slab.h>
+#include <net/ax25.h>
+#include <linux/inet.h>
+#include <linux/netdevice.h>
+#include <linux/skbuff.h>
+#include <net/sock.h>
+#include <linux/uaccess.h>
+#include <linux/fcntl.h>
+#include <linux/mm.h>
+#include <linux/interrupt.h>
+
+static DEFINE_SPINLOCK(ax25_frag_lock);
+
+ax25_cb *ax25_send_frame(struct sk_buff *skb, int paclen, const ax25_address *src, ax25_address *dest, ax25_digi *digi, struct net_device *dev)
+{
+	ax25_dev *ax25_dev;
+	ax25_cb *ax25;
+
+	/*
+	 * Take the default packet length for the device if zero is
+	 * specified.
+	 */
+	if (paclen == 0) {
+		if ((ax25_dev = ax25_dev_ax25dev(dev)) == NULL)
+			return NULL;
+
+		paclen = ax25_dev->values[AX25_VALUES_PACLEN];
+	}
+
+	/*
+	 * Look for an existing connection.
+	 */
+	if ((ax25 = ax25_find_cb(src, dest, digi, dev)) != NULL) {
+		ax25_output(ax25, paclen, skb);
+		return ax25;		/* It already existed */
+	}
+
+	if ((ax25_dev = ax25_dev_ax25dev(dev)) == NULL)
+		return NULL;
+
+	if ((ax25 = ax25_create_cb()) == NULL)
+		return NULL;
+
+	ax25_fillin_cb(ax25, ax25_dev);
+
+	ax25->source_addr = *src;
+	ax25->dest_addr   = *dest;
+
+	if (digi != NULL) {
+		ax25->digipeat = kmemdup(digi, sizeof(*digi), GFP_ATOMIC);
+		if (ax25->digipeat == NULL) {
+			ax25_cb_put(ax25);
+			return NULL;
+		}
+	}
+
+	switch (ax25->ax25_dev->values[AX25_VALUES_PROTOCOL]) {
+	case AX25_PROTO_STD_SIMPLEX:
+	case AX25_PROTO_STD_DUPLEX:
+		ax25_std_establish_data_link(ax25);
+		break;
+
+#ifdef CONFIG_AX25_DAMA_SLAVE
+	case AX25_PROTO_DAMA_SLAVE:
+		if (ax25_dev->dama.slave)
+			ax25_ds_establish_data_link(ax25);
+		else
+			ax25_std_establish_data_link(ax25);
+		break;
+#endif
+	}
+
+	/*
+	 * There is one ref for the state machine; a caller needs
+	 * one more to put it back, just like with the existing one.
+	 */
+	ax25_cb_hold(ax25);
+
+	ax25_cb_add(ax25);
+
+	ax25->state = AX25_STATE_1;
+
+	ax25_start_heartbeat(ax25);
+
+	ax25_output(ax25, paclen, skb);
+
+	return ax25;			/* We had to create it */
+}
+
+EXPORT_SYMBOL(ax25_send_frame);
+
+/*
+ *	All outgoing AX.25 I frames pass via this routine. Therefore this is
+ *	where the fragmentation of frames takes place. If fragment is set to
+ *	zero then we are not allowed to do fragmentation, even if the frame
+ *	is too large.
+ */
+void ax25_output(ax25_cb *ax25, int paclen, struct sk_buff *skb)
+{
+	struct sk_buff *skbn;
+	unsigned char *p;
+	int frontlen, len, fragno, ka9qfrag, first = 1;
+
+	if (paclen < 16) {
+		WARN_ON_ONCE(1);
+		kfree_skb(skb);
+		return;
+	}
+
+	if ((skb->len - 1) > paclen) {
+		if (*skb->data == AX25_P_TEXT) {
+			skb_pull(skb, 1); /* skip PID */
+			ka9qfrag = 0;
+		} else {
+			paclen -= 2;	/* Allow for fragment control info */
+			ka9qfrag = 1;
+		}
+
+		fragno = skb->len / paclen;
+		if (skb->len % paclen == 0) fragno--;
+
+		frontlen = skb_headroom(skb);	/* Address space + CTRL */
+
+		while (skb->len > 0) {
+			spin_lock_bh(&ax25_frag_lock);
+			if ((skbn = alloc_skb(paclen + 2 + frontlen, GFP_ATOMIC)) == NULL) {
+				spin_unlock_bh(&ax25_frag_lock);
+				printk(KERN_CRIT "AX.25: ax25_output - out of memory\n");
+				return;
+			}
+
+			if (skb->sk != NULL)
+				skb_set_owner_w(skbn, skb->sk);
+
+			spin_unlock_bh(&ax25_frag_lock);
+
+			len = (paclen > skb->len) ? skb->len : paclen;
+
+			if (ka9qfrag == 1) {
+				skb_reserve(skbn, frontlen + 2);
+				skb_set_network_header(skbn,
+						      skb_network_offset(skb));
+				skb_copy_from_linear_data(skb, skb_put(skbn, len), len);
+				p = skb_push(skbn, 2);
+
+				*p++ = AX25_P_SEGMENT;
+
+				*p = fragno--;
+				if (first) {
+					*p |= AX25_SEG_FIRST;
+					first = 0;
+				}
+			} else {
+				skb_reserve(skbn, frontlen + 1);
+				skb_set_network_header(skbn,
+						      skb_network_offset(skb));
+				skb_copy_from_linear_data(skb, skb_put(skbn, len), len);
+				p = skb_push(skbn, 1);
+				*p = AX25_P_TEXT;
+			}
+
+			skb_pull(skb, len);
+			skb_queue_tail(&ax25->write_queue, skbn); /* Throw it on the queue */
+		}
+
+		kfree_skb(skb);
+	} else {
+		skb_queue_tail(&ax25->write_queue, skb);	  /* Throw it on the queue */
+	}
+
+	switch (ax25->ax25_dev->values[AX25_VALUES_PROTOCOL]) {
+	case AX25_PROTO_STD_SIMPLEX:
+	case AX25_PROTO_STD_DUPLEX:
+		ax25_kick(ax25);
+		break;
+
+#ifdef CONFIG_AX25_DAMA_SLAVE
+	/*
+	 * A DAMA slave is _required_ to work as normal AX.25L2V2
+	 * if no DAMA master is available.
+	 */
+	case AX25_PROTO_DAMA_SLAVE:
+		if (!ax25->ax25_dev->dama.slave) ax25_kick(ax25);
+		break;
+#endif
+	}
+}
+
+/*
+ *  This procedure is passed a buffer descriptor for an iframe. It builds
+ *  the rest of the control part of the frame and then writes it out.
+ */
+static void ax25_send_iframe(ax25_cb *ax25, struct sk_buff *skb, int poll_bit)
+{
+	unsigned char *frame;
+
+	if (skb == NULL)
+		return;
+
+	skb_reset_network_header(skb);
+
+	if (ax25->modulus == AX25_MODULUS) {
+		frame = skb_push(skb, 1);
+
+		*frame = AX25_I;
+		*frame |= (poll_bit) ? AX25_PF : 0;
+		*frame |= (ax25->vr << 5);
+		*frame |= (ax25->vs << 1);
+	} else {
+		frame = skb_push(skb, 2);
+
+		frame[0] = AX25_I;
+		frame[0] |= (ax25->vs << 1);
+		frame[1] = (poll_bit) ? AX25_EPF : 0;
+		frame[1] |= (ax25->vr << 1);
+	}
+
+	ax25_start_idletimer(ax25);
+
+	ax25_transmit_buffer(ax25, skb, AX25_COMMAND);
+}
+
+void ax25_kick(ax25_cb *ax25)
+{
+	struct sk_buff *skb, *skbn;
+	int last = 1;
+	unsigned short start, end, next;
+
+	if (ax25->state != AX25_STATE_3 && ax25->state != AX25_STATE_4)
+		return;
+
+	if (ax25->condition & AX25_COND_PEER_RX_BUSY)
+		return;
+
+	if (skb_peek(&ax25->write_queue) == NULL)
+		return;
+
+	start = (skb_peek(&ax25->ack_queue) == NULL) ? ax25->va : ax25->vs;
+	end   = (ax25->va + ax25->window) % ax25->modulus;
+
+	if (start == end)
+		return;
+
+	/*
+	 * Transmit data until either we're out of data to send or
+	 * the window is full. Send a poll on the final I frame if
+	 * the window is filled.
+	 */
+
+	/*
+	 * Dequeue the frame and copy it.
+	 * Check for race with ax25_clear_queues().
+	 */
+	skb  = skb_dequeue(&ax25->write_queue);
+	if (!skb)
+		return;
+
+	ax25->vs = start;
+
+	do {
+		if ((skbn = skb_clone(skb, GFP_ATOMIC)) == NULL) {
+			skb_queue_head(&ax25->write_queue, skb);
+			break;
+		}
+
+		if (skb->sk != NULL)
+			skb_set_owner_w(skbn, skb->sk);
+
+		next = (ax25->vs + 1) % ax25->modulus;
+		last = (next == end);
+
+		/*
+		 * Transmit the frame copy.
+		 * bke 960114: do not set the Poll bit on the last frame
+		 * in DAMA mode.
+		 */
+		switch (ax25->ax25_dev->values[AX25_VALUES_PROTOCOL]) {
+		case AX25_PROTO_STD_SIMPLEX:
+		case AX25_PROTO_STD_DUPLEX:
+			ax25_send_iframe(ax25, skbn, (last) ? AX25_POLLON : AX25_POLLOFF);
+			break;
+
+#ifdef CONFIG_AX25_DAMA_SLAVE
+		case AX25_PROTO_DAMA_SLAVE:
+			ax25_send_iframe(ax25, skbn, AX25_POLLOFF);
+			break;
+#endif
+		}
+
+		ax25->vs = next;
+
+		/*
+		 * Requeue the original data frame.
+		 */
+		skb_queue_tail(&ax25->ack_queue, skb);
+
+	} while (!last && (skb = skb_dequeue(&ax25->write_queue)) != NULL);
+
+	ax25->condition &= ~AX25_COND_ACK_PENDING;
+
+	if (!ax25_t1timer_running(ax25)) {
+		ax25_stop_t3timer(ax25);
+		ax25_calculate_t1(ax25);
+		ax25_start_t1timer(ax25);
+	}
+}
+
+void ax25_transmit_buffer(ax25_cb *ax25, struct sk_buff *skb, int type)
+{
+	unsigned char *ptr;
+	int headroom;
+
+	if (ax25->ax25_dev == NULL) {
+		ax25_disconnect(ax25, ENETUNREACH);
+		return;
+	}
+
+	headroom = ax25_addr_size(ax25->digipeat);
+
+	if (unlikely(skb_headroom(skb) < headroom)) {
+		skb = skb_expand_head(skb, headroom);
+		if (!skb) {
+			printk(KERN_CRIT "AX.25: ax25_transmit_buffer - out of memory\n");
+			return;
+		}
+	}
+
+	ptr = skb_push(skb, headroom);
+
+	ax25_addr_build(ptr, &ax25->source_addr, &ax25->dest_addr, ax25->digipeat, type, ax25->modulus);
+
+	ax25_queue_xmit(skb, ax25->ax25_dev->dev);
+}
+
+/*
+ *	A small shim to dev_queue_xmit to add the KISS control byte, and do
+ *	any packet forwarding in operation.
+ */
+void ax25_queue_xmit(struct sk_buff *skb, struct net_device *dev)
+{
+	unsigned char *ptr;
+
+	skb->protocol = ax25_type_trans(skb, ax25_fwd_dev(dev));
+
+	ptr  = skb_push(skb, 1);
+	*ptr = 0x00;			/* KISS */
+
+	dev_queue_xmit(skb);
+}
+
+int ax25_check_iframes_acked(ax25_cb *ax25, unsigned short nr)
+{
+	if (ax25->vs == nr) {
+		ax25_frames_acked(ax25, nr);
+		ax25_calculate_rtt(ax25);
+		ax25_stop_t1timer(ax25);
+		ax25_start_t3timer(ax25);
+		return 1;
+	} else {
+		if (ax25->va != nr) {
+			ax25_frames_acked(ax25, nr);
+			ax25_calculate_t1(ax25);
+			ax25_start_t1timer(ax25);
+			return 1;
+		}
+	}
+	return 0;
+}