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, 421 insertions, 0 deletions

diff --git a/net/x25/x25_link.c b/net/x25/x25_link.c
new file mode 100644
index 000000000..5460b9146
--- /dev/null
+++ b/net/x25/x25_link.c
@@ -0,0 +1,421 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ *	X.25 Packet Layer release 002
+ *
+ *	This is ALPHA test software. This code may break your machine,
+ *	randomly fail to work with new releases, misbehave and/or generally
+ *	screw up. It might even work.
+ *
+ *	This code REQUIRES 2.1.15 or higher
+ *
+ *	History
+ *	X.25 001	Jonathan Naylor	  Started coding.
+ *	X.25 002	Jonathan Naylor	  New timer architecture.
+ *	mar/20/00	Daniela Squassoni Disabling/enabling of facilities
+ *					  negotiation.
+ *	2000-09-04	Henner Eisen	  dev_hold() / dev_put() for x25_neigh.
+ */
+
+#define pr_fmt(fmt) "X25: " fmt
+
+#include <linux/kernel.h>
+#include <linux/jiffies.h>
+#include <linux/timer.h>
+#include <linux/slab.h>
+#include <linux/netdevice.h>
+#include <linux/skbuff.h>
+#include <linux/uaccess.h>
+#include <linux/init.h>
+#include <net/x25.h>
+
+LIST_HEAD(x25_neigh_list);
+DEFINE_RWLOCK(x25_neigh_list_lock);
+
+static void x25_t20timer_expiry(struct timer_list *);
+
+static void x25_transmit_restart_confirmation(struct x25_neigh *nb);
+static void x25_transmit_restart_request(struct x25_neigh *nb);
+
+/*
+ *	Linux set/reset timer routines
+ */
+static inline void x25_start_t20timer(struct x25_neigh *nb)
+{
+	mod_timer(&nb->t20timer, jiffies + nb->t20);
+}
+
+static void x25_t20timer_expiry(struct timer_list *t)
+{
+	struct x25_neigh *nb = from_timer(nb, t, t20timer);
+
+	x25_transmit_restart_request(nb);
+
+	x25_start_t20timer(nb);
+}
+
+static inline void x25_stop_t20timer(struct x25_neigh *nb)
+{
+	del_timer(&nb->t20timer);
+}
+
+/*
+ *	This handles all restart and diagnostic frames.
+ */
+void x25_link_control(struct sk_buff *skb, struct x25_neigh *nb,
+		      unsigned short frametype)
+{
+	struct sk_buff *skbn;
+
+	switch (frametype) {
+	case X25_RESTART_REQUEST:
+		switch (nb->state) {
+		case X25_LINK_STATE_0:
+			/* This can happen when the x25 module just gets loaded
+			 * and doesn't know layer 2 has already connected
+			 */
+			nb->state = X25_LINK_STATE_3;
+			x25_transmit_restart_confirmation(nb);
+			break;
+		case X25_LINK_STATE_2:
+			x25_stop_t20timer(nb);
+			nb->state = X25_LINK_STATE_3;
+			break;
+		case X25_LINK_STATE_3:
+			/* clear existing virtual calls */
+			x25_kill_by_neigh(nb);
+
+			x25_transmit_restart_confirmation(nb);
+			break;
+		}
+		break;
+
+	case X25_RESTART_CONFIRMATION:
+		switch (nb->state) {
+		case X25_LINK_STATE_2:
+			x25_stop_t20timer(nb);
+			nb->state = X25_LINK_STATE_3;
+			break;
+		case X25_LINK_STATE_3:
+			/* clear existing virtual calls */
+			x25_kill_by_neigh(nb);
+
+			x25_transmit_restart_request(nb);
+			nb->state = X25_LINK_STATE_2;
+			x25_start_t20timer(nb);
+			break;
+		}
+		break;
+
+	case X25_DIAGNOSTIC:
+		if (!pskb_may_pull(skb, X25_STD_MIN_LEN + 4))
+			break;
+
+		pr_warn("diagnostic #%d - %02X %02X %02X\n",
+		       skb->data[3], skb->data[4],
+		       skb->data[5], skb->data[6]);
+		break;
+
+	default:
+		pr_warn("received unknown %02X with LCI 000\n",
+		       frametype);
+		break;
+	}
+
+	if (nb->state == X25_LINK_STATE_3)
+		while ((skbn = skb_dequeue(&nb->queue)) != NULL)
+			x25_send_frame(skbn, nb);
+}
+
+/*
+ *	This routine is called when a Restart Request is needed
+ */
+static void x25_transmit_restart_request(struct x25_neigh *nb)
+{
+	unsigned char *dptr;
+	int len = X25_MAX_L2_LEN + X25_STD_MIN_LEN + 2;
+	struct sk_buff *skb = alloc_skb(len, GFP_ATOMIC);
+
+	if (!skb)
+		return;
+
+	skb_reserve(skb, X25_MAX_L2_LEN);
+
+	dptr = skb_put(skb, X25_STD_MIN_LEN + 2);
+
+	*dptr++ = nb->extended ? X25_GFI_EXTSEQ : X25_GFI_STDSEQ;
+	*dptr++ = 0x00;
+	*dptr++ = X25_RESTART_REQUEST;
+	*dptr++ = 0x00;
+	*dptr++ = 0;
+
+	skb->sk = NULL;
+
+	x25_send_frame(skb, nb);
+}
+
+/*
+ * This routine is called when a Restart Confirmation is needed
+ */
+static void x25_transmit_restart_confirmation(struct x25_neigh *nb)
+{
+	unsigned char *dptr;
+	int len = X25_MAX_L2_LEN + X25_STD_MIN_LEN;
+	struct sk_buff *skb = alloc_skb(len, GFP_ATOMIC);
+
+	if (!skb)
+		return;
+
+	skb_reserve(skb, X25_MAX_L2_LEN);
+
+	dptr = skb_put(skb, X25_STD_MIN_LEN);
+
+	*dptr++ = nb->extended ? X25_GFI_EXTSEQ : X25_GFI_STDSEQ;
+	*dptr++ = 0x00;
+	*dptr++ = X25_RESTART_CONFIRMATION;
+
+	skb->sk = NULL;
+
+	x25_send_frame(skb, nb);
+}
+
+/*
+ *	This routine is called when a Clear Request is needed outside of the context
+ *	of a connected socket.
+ */
+void x25_transmit_clear_request(struct x25_neigh *nb, unsigned int lci,
+				unsigned char cause)
+{
+	unsigned char *dptr;
+	int len = X25_MAX_L2_LEN + X25_STD_MIN_LEN + 2;
+	struct sk_buff *skb = alloc_skb(len, GFP_ATOMIC);
+
+	if (!skb)
+		return;
+
+	skb_reserve(skb, X25_MAX_L2_LEN);
+
+	dptr = skb_put(skb, X25_STD_MIN_LEN + 2);
+
+	*dptr++ = ((lci >> 8) & 0x0F) | (nb->extended ?
+					 X25_GFI_EXTSEQ :
+					 X25_GFI_STDSEQ);
+	*dptr++ = (lci >> 0) & 0xFF;
+	*dptr++ = X25_CLEAR_REQUEST;
+	*dptr++ = cause;
+	*dptr++ = 0x00;
+
+	skb->sk = NULL;
+
+	x25_send_frame(skb, nb);
+}
+
+void x25_transmit_link(struct sk_buff *skb, struct x25_neigh *nb)
+{
+	switch (nb->state) {
+	case X25_LINK_STATE_0:
+		skb_queue_tail(&nb->queue, skb);
+		nb->state = X25_LINK_STATE_1;
+		x25_establish_link(nb);
+		break;
+	case X25_LINK_STATE_1:
+	case X25_LINK_STATE_2:
+		skb_queue_tail(&nb->queue, skb);
+		break;
+	case X25_LINK_STATE_3:
+		x25_send_frame(skb, nb);
+		break;
+	}
+}
+
+/*
+ *	Called when the link layer has become established.
+ */
+void x25_link_established(struct x25_neigh *nb)
+{
+	switch (nb->state) {
+	case X25_LINK_STATE_0:
+	case X25_LINK_STATE_1:
+		x25_transmit_restart_request(nb);
+		nb->state = X25_LINK_STATE_2;
+		x25_start_t20timer(nb);
+		break;
+	}
+}
+
+/*
+ *	Called when the link layer has terminated, or an establishment
+ *	request has failed.
+ */
+
+void x25_link_terminated(struct x25_neigh *nb)
+{
+	nb->state = X25_LINK_STATE_0;
+	skb_queue_purge(&nb->queue);
+	x25_stop_t20timer(nb);
+
+	/* Out of order: clear existing virtual calls (X.25 03/93 4.6.3) */
+	x25_kill_by_neigh(nb);
+}
+
+/*
+ *	Add a new device.
+ */
+void x25_link_device_up(struct net_device *dev)
+{
+	struct x25_neigh *nb = kmalloc(sizeof(*nb), GFP_ATOMIC);
+
+	if (!nb)
+		return;
+
+	skb_queue_head_init(&nb->queue);
+	timer_setup(&nb->t20timer, x25_t20timer_expiry, 0);
+
+	dev_hold(dev);
+	nb->dev      = dev;
+	nb->state    = X25_LINK_STATE_0;
+	nb->extended = 0;
+	/*
+	 * Enables negotiation
+	 */
+	nb->global_facil_mask = X25_MASK_REVERSE |
+				       X25_MASK_THROUGHPUT |
+				       X25_MASK_PACKET_SIZE |
+				       X25_MASK_WINDOW_SIZE;
+	nb->t20      = sysctl_x25_restart_request_timeout;
+	refcount_set(&nb->refcnt, 1);
+
+	write_lock_bh(&x25_neigh_list_lock);
+	list_add(&nb->node, &x25_neigh_list);
+	write_unlock_bh(&x25_neigh_list_lock);
+}
+
+/**
+ *	__x25_remove_neigh - remove neighbour from x25_neigh_list
+ *	@nb: - neigh to remove
+ *
+ *	Remove neighbour from x25_neigh_list. If it was there.
+ *	Caller must hold x25_neigh_list_lock.
+ */
+static void __x25_remove_neigh(struct x25_neigh *nb)
+{
+	if (nb->node.next) {
+		list_del(&nb->node);
+		x25_neigh_put(nb);
+	}
+}
+
+/*
+ *	A device has been removed, remove its links.
+ */
+void x25_link_device_down(struct net_device *dev)
+{
+	struct x25_neigh *nb;
+	struct list_head *entry, *tmp;
+
+	write_lock_bh(&x25_neigh_list_lock);
+
+	list_for_each_safe(entry, tmp, &x25_neigh_list) {
+		nb = list_entry(entry, struct x25_neigh, node);
+
+		if (nb->dev == dev) {
+			__x25_remove_neigh(nb);
+			dev_put(dev);
+		}
+	}
+
+	write_unlock_bh(&x25_neigh_list_lock);
+}
+
+/*
+ *	Given a device, return the neighbour address.
+ */
+struct x25_neigh *x25_get_neigh(struct net_device *dev)
+{
+	struct x25_neigh *nb, *use = NULL;
+
+	read_lock_bh(&x25_neigh_list_lock);
+	list_for_each_entry(nb, &x25_neigh_list, node) {
+		if (nb->dev == dev) {
+			use = nb;
+			break;
+		}
+	}
+
+	if (use)
+		x25_neigh_hold(use);
+	read_unlock_bh(&x25_neigh_list_lock);
+	return use;
+}
+
+/*
+ *	Handle the ioctls that control the subscription functions.
+ */
+int x25_subscr_ioctl(unsigned int cmd, void __user *arg)
+{
+	struct x25_subscrip_struct x25_subscr;
+	struct x25_neigh *nb;
+	struct net_device *dev;
+	int rc = -EINVAL;
+
+	if (cmd != SIOCX25GSUBSCRIP && cmd != SIOCX25SSUBSCRIP)
+		goto out;
+
+	rc = -EFAULT;
+	if (copy_from_user(&x25_subscr, arg, sizeof(x25_subscr)))
+		goto out;
+
+	rc = -EINVAL;
+	if ((dev = x25_dev_get(x25_subscr.device)) == NULL)
+		goto out;
+
+	if ((nb = x25_get_neigh(dev)) == NULL)
+		goto out_dev_put;
+
+	dev_put(dev);
+
+	if (cmd == SIOCX25GSUBSCRIP) {
+		read_lock_bh(&x25_neigh_list_lock);
+		x25_subscr.extended	     = nb->extended;
+		x25_subscr.global_facil_mask = nb->global_facil_mask;
+		read_unlock_bh(&x25_neigh_list_lock);
+		rc = copy_to_user(arg, &x25_subscr,
+				  sizeof(x25_subscr)) ? -EFAULT : 0;
+	} else {
+		rc = -EINVAL;
+		if (!(x25_subscr.extended && x25_subscr.extended != 1)) {
+			rc = 0;
+			write_lock_bh(&x25_neigh_list_lock);
+			nb->extended	     = x25_subscr.extended;
+			nb->global_facil_mask = x25_subscr.global_facil_mask;
+			write_unlock_bh(&x25_neigh_list_lock);
+		}
+	}
+	x25_neigh_put(nb);
+out:
+	return rc;
+out_dev_put:
+	dev_put(dev);
+	goto out;
+}
+
+
+/*
+ *	Release all memory associated with X.25 neighbour structures.
+ */
+void __exit x25_link_free(void)
+{
+	struct x25_neigh *nb;
+	struct list_head *entry, *tmp;
+
+	write_lock_bh(&x25_neigh_list_lock);
+
+	list_for_each_safe(entry, tmp, &x25_neigh_list) {
+		struct net_device *dev;
+
+		nb = list_entry(entry, struct x25_neigh, node);
+		dev = nb->dev;
+		__x25_remove_neigh(nb);
+		dev_put(dev);
+	}
+	write_unlock_bh(&x25_neigh_list_lock);
+}