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, 296 insertions, 0 deletions

diff --git a/net/ax25/ax25_subr.c b/net/ax25/ax25_subr.c
new file mode 100644
index 000000000..9ff98f46d
--- /dev/null
+++ b/net/ax25/ax25_subr.c
@@ -0,0 +1,296 @@
+// 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)
+ * Copyright (C) Frederic Rible F1OAT (frible@teaser.fr)
+ */
+#include <linux/errno.h>
+#include <linux/types.h>
+#include <linux/socket.h>
+#include <linux/in.h>
+#include <linux/kernel.h>
+#include <linux/timer.h>
+#include <linux/string.h>
+#include <linux/sockios.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 <net/tcp_states.h>
+#include <linux/uaccess.h>
+#include <linux/fcntl.h>
+#include <linux/mm.h>
+#include <linux/interrupt.h>
+
+/*
+ *	This routine purges all the queues of frames.
+ */
+void ax25_clear_queues(ax25_cb *ax25)
+{
+	skb_queue_purge(&ax25->write_queue);
+	skb_queue_purge(&ax25->ack_queue);
+	skb_queue_purge(&ax25->reseq_queue);
+	skb_queue_purge(&ax25->frag_queue);
+}
+
+/*
+ * This routine purges the input queue of those frames that have been
+ * acknowledged. This replaces the boxes labelled "V(a) <- N(r)" on the
+ * SDL diagram.
+ */
+void ax25_frames_acked(ax25_cb *ax25, unsigned short nr)
+{
+	struct sk_buff *skb;
+
+	/*
+	 * Remove all the ack-ed frames from the ack queue.
+	 */
+	if (ax25->va != nr) {
+		while (skb_peek(&ax25->ack_queue) != NULL && ax25->va != nr) {
+			skb = skb_dequeue(&ax25->ack_queue);
+			kfree_skb(skb);
+			ax25->va = (ax25->va + 1) % ax25->modulus;
+		}
+	}
+}
+
+void ax25_requeue_frames(ax25_cb *ax25)
+{
+	struct sk_buff *skb;
+
+	/*
+	 * Requeue all the un-ack-ed frames on the output queue to be picked
+	 * up by ax25_kick called from the timer. This arrangement handles the
+	 * possibility of an empty output queue.
+	 */
+	while ((skb = skb_dequeue_tail(&ax25->ack_queue)) != NULL)
+		skb_queue_head(&ax25->write_queue, skb);
+}
+
+/*
+ *	Validate that the value of nr is between va and vs. Return true or
+ *	false for testing.
+ */
+int ax25_validate_nr(ax25_cb *ax25, unsigned short nr)
+{
+	unsigned short vc = ax25->va;
+
+	while (vc != ax25->vs) {
+		if (nr == vc) return 1;
+		vc = (vc + 1) % ax25->modulus;
+	}
+
+	if (nr == ax25->vs) return 1;
+
+	return 0;
+}
+
+/*
+ *	This routine is the centralised routine for parsing the control
+ *	information for the different frame formats.
+ */
+int ax25_decode(ax25_cb *ax25, struct sk_buff *skb, int *ns, int *nr, int *pf)
+{
+	unsigned char *frame;
+	int frametype = AX25_ILLEGAL;
+
+	frame = skb->data;
+	*ns = *nr = *pf = 0;
+
+	if (ax25->modulus == AX25_MODULUS) {
+		if ((frame[0] & AX25_S) == 0) {
+			frametype = AX25_I;			/* I frame - carries NR/NS/PF */
+			*ns = (frame[0] >> 1) & 0x07;
+			*nr = (frame[0] >> 5) & 0x07;
+			*pf = frame[0] & AX25_PF;
+		} else if ((frame[0] & AX25_U) == 1) { 	/* S frame - take out PF/NR */
+			frametype = frame[0] & 0x0F;
+			*nr = (frame[0] >> 5) & 0x07;
+			*pf = frame[0] & AX25_PF;
+		} else if ((frame[0] & AX25_U) == 3) { 	/* U frame - take out PF */
+			frametype = frame[0] & ~AX25_PF;
+			*pf = frame[0] & AX25_PF;
+		}
+		skb_pull(skb, 1);
+	} else {
+		if ((frame[0] & AX25_S) == 0) {
+			frametype = AX25_I;			/* I frame - carries NR/NS/PF */
+			*ns = (frame[0] >> 1) & 0x7F;
+			*nr = (frame[1] >> 1) & 0x7F;
+			*pf = frame[1] & AX25_EPF;
+			skb_pull(skb, 2);
+		} else if ((frame[0] & AX25_U) == 1) { 	/* S frame - take out PF/NR */
+			frametype = frame[0] & 0x0F;
+			*nr = (frame[1] >> 1) & 0x7F;
+			*pf = frame[1] & AX25_EPF;
+			skb_pull(skb, 2);
+		} else if ((frame[0] & AX25_U) == 3) { 	/* U frame - take out PF */
+			frametype = frame[0] & ~AX25_PF;
+			*pf = frame[0] & AX25_PF;
+			skb_pull(skb, 1);
+		}
+	}
+
+	return frametype;
+}
+
+/*
+ *	This routine is called when the HDLC layer internally  generates a
+ *	command or  response  for  the remote machine ( eg. RR, UA etc. ).
+ *	Only supervisory or unnumbered frames are processed.
+ */
+void ax25_send_control(ax25_cb *ax25, int frametype, int poll_bit, int type)
+{
+	struct sk_buff *skb;
+	unsigned char  *dptr;
+
+	if ((skb = alloc_skb(ax25->ax25_dev->dev->hard_header_len + 2, GFP_ATOMIC)) == NULL)
+		return;
+
+	skb_reserve(skb, ax25->ax25_dev->dev->hard_header_len);
+
+	skb_reset_network_header(skb);
+
+	/* Assume a response - address structure for DTE */
+	if (ax25->modulus == AX25_MODULUS) {
+		dptr = skb_put(skb, 1);
+		*dptr = frametype;
+		*dptr |= (poll_bit) ? AX25_PF : 0;
+		if ((frametype & AX25_U) == AX25_S)		/* S frames carry NR */
+			*dptr |= (ax25->vr << 5);
+	} else {
+		if ((frametype & AX25_U) == AX25_U) {
+			dptr = skb_put(skb, 1);
+			*dptr = frametype;
+			*dptr |= (poll_bit) ? AX25_PF : 0;
+		} else {
+			dptr = skb_put(skb, 2);
+			dptr[0] = frametype;
+			dptr[1] = (ax25->vr << 1);
+			dptr[1] |= (poll_bit) ? AX25_EPF : 0;
+		}
+	}
+
+	ax25_transmit_buffer(ax25, skb, type);
+}
+
+/*
+ *	Send a 'DM' to an unknown connection attempt, or an invalid caller.
+ *
+ *	Note: src here is the sender, thus it's the target of the DM
+ */
+void ax25_return_dm(struct net_device *dev, ax25_address *src, ax25_address *dest, ax25_digi *digi)
+{
+	struct sk_buff *skb;
+	char *dptr;
+	ax25_digi retdigi;
+
+	if (dev == NULL)
+		return;
+
+	if ((skb = alloc_skb(dev->hard_header_len + 1, GFP_ATOMIC)) == NULL)
+		return;	/* Next SABM will get DM'd */
+
+	skb_reserve(skb, dev->hard_header_len);
+	skb_reset_network_header(skb);
+
+	ax25_digi_invert(digi, &retdigi);
+
+	dptr = skb_put(skb, 1);
+
+	*dptr = AX25_DM | AX25_PF;
+
+	/*
+	 *	Do the address ourselves
+	 */
+	dptr  = skb_push(skb, ax25_addr_size(digi));
+	dptr += ax25_addr_build(dptr, dest, src, &retdigi, AX25_RESPONSE, AX25_MODULUS);
+
+	ax25_queue_xmit(skb, dev);
+}
+
+/*
+ *	Exponential backoff for AX.25
+ */
+void ax25_calculate_t1(ax25_cb *ax25)
+{
+	int n, t = 2;
+
+	switch (ax25->backoff) {
+	case 0:
+		break;
+
+	case 1:
+		t += 2 * ax25->n2count;
+		break;
+
+	case 2:
+		for (n = 0; n < ax25->n2count; n++)
+			t *= 2;
+		if (t > 8) t = 8;
+		break;
+	}
+
+	ax25->t1 = t * ax25->rtt;
+}
+
+/*
+ *	Calculate the Round Trip Time
+ */
+void ax25_calculate_rtt(ax25_cb *ax25)
+{
+	if (ax25->backoff == 0)
+		return;
+
+	if (ax25_t1timer_running(ax25) && ax25->n2count == 0)
+		ax25->rtt = (9 * ax25->rtt + ax25->t1 - ax25_display_timer(&ax25->t1timer)) / 10;
+
+	if (ax25->rtt < AX25_T1CLAMPLO)
+		ax25->rtt = AX25_T1CLAMPLO;
+
+	if (ax25->rtt > AX25_T1CLAMPHI)
+		ax25->rtt = AX25_T1CLAMPHI;
+}
+
+void ax25_disconnect(ax25_cb *ax25, int reason)
+{
+	ax25_clear_queues(ax25);
+
+	if (reason == ENETUNREACH) {
+		del_timer_sync(&ax25->timer);
+		del_timer_sync(&ax25->t1timer);
+		del_timer_sync(&ax25->t2timer);
+		del_timer_sync(&ax25->t3timer);
+		del_timer_sync(&ax25->idletimer);
+	} else {
+		if (ax25->sk && !sock_flag(ax25->sk, SOCK_DESTROY))
+			ax25_stop_heartbeat(ax25);
+		ax25_stop_t1timer(ax25);
+		ax25_stop_t2timer(ax25);
+		ax25_stop_t3timer(ax25);
+		ax25_stop_idletimer(ax25);
+	}
+
+	ax25->state = AX25_STATE_0;
+
+	ax25_link_failed(ax25, reason);
+
+	if (ax25->sk != NULL) {
+		local_bh_disable();
+		bh_lock_sock(ax25->sk);
+		ax25->sk->sk_state     = TCP_CLOSE;
+		ax25->sk->sk_err       = reason;
+		ax25->sk->sk_shutdown |= SEND_SHUTDOWN;
+		if (!sock_flag(ax25->sk, SOCK_DEAD)) {
+			ax25->sk->sk_state_change(ax25->sk);
+			sock_set_flag(ax25->sk, SOCK_DEAD);
+		}
+		bh_unlock_sock(ax25->sk);
+		local_bh_enable();
+	}
+}