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, 323 insertions, 0 deletions

diff --git a/net/ieee802154/6lowpan/rx.c b/net/ieee802154/6lowpan/rx.c
new file mode 100644
index 000000000..517e6493f
--- /dev/null
+++ b/net/ieee802154/6lowpan/rx.c
@@ -0,0 +1,323 @@
+// SPDX-License-Identifier: GPL-2.0-only
+
+#include <linux/if_arp.h>
+
+#include <net/6lowpan.h>
+#include <net/mac802154.h>
+#include <net/ieee802154_netdev.h>
+
+#include "6lowpan_i.h"
+
+#define LOWPAN_DISPATCH_FIRST		0xc0
+#define LOWPAN_DISPATCH_FRAG_MASK	0xf8
+
+#define LOWPAN_DISPATCH_NALP		0x00
+#define LOWPAN_DISPATCH_ESC		0x40
+#define LOWPAN_DISPATCH_HC1		0x42
+#define LOWPAN_DISPATCH_DFF		0x43
+#define LOWPAN_DISPATCH_BC0		0x50
+#define LOWPAN_DISPATCH_MESH		0x80
+
+static int lowpan_give_skb_to_device(struct sk_buff *skb)
+{
+	skb->protocol = htons(ETH_P_IPV6);
+	skb->dev->stats.rx_packets++;
+	skb->dev->stats.rx_bytes += skb->len;
+
+	return netif_rx(skb);
+}
+
+static int lowpan_rx_handlers_result(struct sk_buff *skb, lowpan_rx_result res)
+{
+	switch (res) {
+	case RX_CONTINUE:
+		/* nobody cared about this packet */
+		net_warn_ratelimited("%s: received unknown dispatch\n",
+				     __func__);
+
+		fallthrough;
+	case RX_DROP_UNUSABLE:
+		kfree_skb(skb);
+
+		fallthrough;
+	case RX_DROP:
+		return NET_RX_DROP;
+	case RX_QUEUED:
+		return lowpan_give_skb_to_device(skb);
+	default:
+		break;
+	}
+
+	return NET_RX_DROP;
+}
+
+static inline bool lowpan_is_frag1(u8 dispatch)
+{
+	return (dispatch & LOWPAN_DISPATCH_FRAG_MASK) == LOWPAN_DISPATCH_FRAG1;
+}
+
+static inline bool lowpan_is_fragn(u8 dispatch)
+{
+	return (dispatch & LOWPAN_DISPATCH_FRAG_MASK) == LOWPAN_DISPATCH_FRAGN;
+}
+
+static lowpan_rx_result lowpan_rx_h_frag(struct sk_buff *skb)
+{
+	int ret;
+
+	if (!(lowpan_is_frag1(*skb_network_header(skb)) ||
+	      lowpan_is_fragn(*skb_network_header(skb))))
+		return RX_CONTINUE;
+
+	ret = lowpan_frag_rcv(skb, *skb_network_header(skb) &
+			      LOWPAN_DISPATCH_FRAG_MASK);
+	if (ret == 1)
+		return RX_QUEUED;
+
+	/* Packet is freed by lowpan_frag_rcv on error or put into the frag
+	 * bucket.
+	 */
+	return RX_DROP;
+}
+
+int lowpan_iphc_decompress(struct sk_buff *skb)
+{
+	struct ieee802154_hdr hdr;
+
+	if (ieee802154_hdr_peek_addrs(skb, &hdr) < 0)
+		return -EINVAL;
+
+	return lowpan_header_decompress(skb, skb->dev, &hdr.dest, &hdr.source);
+}
+
+static lowpan_rx_result lowpan_rx_h_iphc(struct sk_buff *skb)
+{
+	int ret;
+
+	if (!lowpan_is_iphc(*skb_network_header(skb)))
+		return RX_CONTINUE;
+
+	/* Setting datagram_offset to zero indicates non frag handling
+	 * while doing lowpan_header_decompress.
+	 */
+	lowpan_802154_cb(skb)->d_size = 0;
+
+	ret = lowpan_iphc_decompress(skb);
+	if (ret < 0)
+		return RX_DROP_UNUSABLE;
+
+	return RX_QUEUED;
+}
+
+lowpan_rx_result lowpan_rx_h_ipv6(struct sk_buff *skb)
+{
+	if (!lowpan_is_ipv6(*skb_network_header(skb)))
+		return RX_CONTINUE;
+
+	/* Pull off the 1-byte of 6lowpan header. */
+	skb_pull(skb, 1);
+	return RX_QUEUED;
+}
+
+static inline bool lowpan_is_esc(u8 dispatch)
+{
+	return dispatch == LOWPAN_DISPATCH_ESC;
+}
+
+static lowpan_rx_result lowpan_rx_h_esc(struct sk_buff *skb)
+{
+	if (!lowpan_is_esc(*skb_network_header(skb)))
+		return RX_CONTINUE;
+
+	net_warn_ratelimited("%s: %s\n", skb->dev->name,
+			     "6LoWPAN ESC not supported\n");
+
+	return RX_DROP_UNUSABLE;
+}
+
+static inline bool lowpan_is_hc1(u8 dispatch)
+{
+	return dispatch == LOWPAN_DISPATCH_HC1;
+}
+
+static lowpan_rx_result lowpan_rx_h_hc1(struct sk_buff *skb)
+{
+	if (!lowpan_is_hc1(*skb_network_header(skb)))
+		return RX_CONTINUE;
+
+	net_warn_ratelimited("%s: %s\n", skb->dev->name,
+			     "6LoWPAN HC1 not supported\n");
+
+	return RX_DROP_UNUSABLE;
+}
+
+static inline bool lowpan_is_dff(u8 dispatch)
+{
+	return dispatch == LOWPAN_DISPATCH_DFF;
+}
+
+static lowpan_rx_result lowpan_rx_h_dff(struct sk_buff *skb)
+{
+	if (!lowpan_is_dff(*skb_network_header(skb)))
+		return RX_CONTINUE;
+
+	net_warn_ratelimited("%s: %s\n", skb->dev->name,
+			     "6LoWPAN DFF not supported\n");
+
+	return RX_DROP_UNUSABLE;
+}
+
+static inline bool lowpan_is_bc0(u8 dispatch)
+{
+	return dispatch == LOWPAN_DISPATCH_BC0;
+}
+
+static lowpan_rx_result lowpan_rx_h_bc0(struct sk_buff *skb)
+{
+	if (!lowpan_is_bc0(*skb_network_header(skb)))
+		return RX_CONTINUE;
+
+	net_warn_ratelimited("%s: %s\n", skb->dev->name,
+			     "6LoWPAN BC0 not supported\n");
+
+	return RX_DROP_UNUSABLE;
+}
+
+static inline bool lowpan_is_mesh(u8 dispatch)
+{
+	return (dispatch & LOWPAN_DISPATCH_FIRST) == LOWPAN_DISPATCH_MESH;
+}
+
+static lowpan_rx_result lowpan_rx_h_mesh(struct sk_buff *skb)
+{
+	if (!lowpan_is_mesh(*skb_network_header(skb)))
+		return RX_CONTINUE;
+
+	net_warn_ratelimited("%s: %s\n", skb->dev->name,
+			     "6LoWPAN MESH not supported\n");
+
+	return RX_DROP_UNUSABLE;
+}
+
+static int lowpan_invoke_rx_handlers(struct sk_buff *skb)
+{
+	lowpan_rx_result res;
+
+#define CALL_RXH(rxh)			\
+	do {				\
+		res = rxh(skb);	\
+		if (res != RX_CONTINUE)	\
+			goto rxh_next;	\
+	} while (0)
+
+	/* likely at first */
+	CALL_RXH(lowpan_rx_h_iphc);
+	CALL_RXH(lowpan_rx_h_frag);
+	CALL_RXH(lowpan_rx_h_ipv6);
+	CALL_RXH(lowpan_rx_h_esc);
+	CALL_RXH(lowpan_rx_h_hc1);
+	CALL_RXH(lowpan_rx_h_dff);
+	CALL_RXH(lowpan_rx_h_bc0);
+	CALL_RXH(lowpan_rx_h_mesh);
+
+rxh_next:
+	return lowpan_rx_handlers_result(skb, res);
+#undef CALL_RXH
+}
+
+static inline bool lowpan_is_nalp(u8 dispatch)
+{
+	return (dispatch & LOWPAN_DISPATCH_FIRST) == LOWPAN_DISPATCH_NALP;
+}
+
+/* Lookup for reserved dispatch values at:
+ * https://www.iana.org/assignments/_6lowpan-parameters/_6lowpan-parameters.xhtml#_6lowpan-parameters-1
+ *
+ * Last Updated: 2015-01-22
+ */
+static inline bool lowpan_is_reserved(u8 dispatch)
+{
+	return ((dispatch >= 0x44 && dispatch <= 0x4F) ||
+		(dispatch >= 0x51 && dispatch <= 0x5F) ||
+		(dispatch >= 0xc8 && dispatch <= 0xdf) ||
+		dispatch >= 0xe8);
+}
+
+/* lowpan_rx_h_check checks on generic 6LoWPAN requirements
+ * in MAC and 6LoWPAN header.
+ *
+ * Don't manipulate the skb here, it could be shared buffer.
+ */
+static inline bool lowpan_rx_h_check(struct sk_buff *skb)
+{
+	__le16 fc = ieee802154_get_fc_from_skb(skb);
+
+	/* check on ieee802154 conform 6LoWPAN header */
+	if (!ieee802154_is_data(fc) ||
+	    !ieee802154_skb_is_intra_pan_addressing(fc, skb))
+		return false;
+
+	/* check if we can dereference the dispatch */
+	if (unlikely(!skb->len))
+		return false;
+
+	if (lowpan_is_nalp(*skb_network_header(skb)) ||
+	    lowpan_is_reserved(*skb_network_header(skb)))
+		return false;
+
+	return true;
+}
+
+static int lowpan_rcv(struct sk_buff *skb, struct net_device *wdev,
+		      struct packet_type *pt, struct net_device *orig_wdev)
+{
+	struct net_device *ldev;
+
+	if (wdev->type != ARPHRD_IEEE802154 ||
+	    skb->pkt_type == PACKET_OTHERHOST ||
+	    !lowpan_rx_h_check(skb))
+		goto drop;
+
+	ldev = wdev->ieee802154_ptr->lowpan_dev;
+	if (!ldev || !netif_running(ldev))
+		goto drop;
+
+	/* Replacing skb->dev and followed rx handlers will manipulate skb. */
+	skb = skb_share_check(skb, GFP_ATOMIC);
+	if (!skb)
+		goto out;
+	skb->dev = ldev;
+
+	/* When receive frag1 it's likely that we manipulate the buffer.
+	 * When recevie iphc we manipulate the data buffer. So we need
+	 * to unshare the buffer.
+	 */
+	if (lowpan_is_frag1(*skb_network_header(skb)) ||
+	    lowpan_is_iphc(*skb_network_header(skb))) {
+		skb = skb_unshare(skb, GFP_ATOMIC);
+		if (!skb)
+			goto out;
+	}
+
+	return lowpan_invoke_rx_handlers(skb);
+
+drop:
+	kfree_skb(skb);
+out:
+	return NET_RX_DROP;
+}
+
+static struct packet_type lowpan_packet_type = {
+	.type = htons(ETH_P_IEEE802154),
+	.func = lowpan_rcv,
+};
+
+void lowpan_rx_init(void)
+{
+	dev_add_pack(&lowpan_packet_type);
+}
+
+void lowpan_rx_exit(void)
+{
+	dev_remove_pack(&lowpan_packet_type);
+}