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, 489 insertions, 0 deletions

diff --git a/include/net/ax25.h b/include/net/ax25.h
new file mode 100644
index 000000000..f8cf3629a
--- /dev/null
+++ b/include/net/ax25.h
@@ -0,0 +1,489 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ *	Declarations of AX.25 type objects.
+ *
+ *	Alan Cox (GW4PTS) 	10/11/93
+ */
+#ifndef _AX25_H
+#define _AX25_H 
+
+#include <linux/ax25.h>
+#include <linux/spinlock.h>
+#include <linux/timer.h>
+#include <linux/list.h>
+#include <linux/slab.h>
+#include <linux/refcount.h>
+#include <net/neighbour.h>
+#include <net/sock.h>
+#include <linux/seq_file.h>
+
+#define	AX25_T1CLAMPLO  		1
+#define	AX25_T1CLAMPHI 			(30 * HZ)
+
+#define	AX25_BPQ_HEADER_LEN		16
+#define	AX25_KISS_HEADER_LEN		1
+
+#define	AX25_HEADER_LEN			17
+#define	AX25_ADDR_LEN			7
+#define	AX25_DIGI_HEADER_LEN		(AX25_MAX_DIGIS * AX25_ADDR_LEN)
+#define	AX25_MAX_HEADER_LEN		(AX25_HEADER_LEN + AX25_DIGI_HEADER_LEN)
+
+/* AX.25 Protocol IDs */
+#define AX25_P_ROSE			0x01
+#define AX25_P_VJCOMP			0x06	/* Compressed TCP/IP packet   */
+						/* Van Jacobsen (RFC 1144)    */
+#define AX25_P_VJUNCOMP			0x07	/* Uncompressed TCP/IP packet */
+						/* Van Jacobsen (RFC 1144)    */
+#define	AX25_P_SEGMENT			0x08	/* Segmentation fragment      */
+#define AX25_P_TEXNET			0xc3	/* TEXTNET datagram protocol  */
+#define AX25_P_LQ			0xc4	/* Link Quality Protocol      */
+#define AX25_P_ATALK			0xca	/* Appletalk                  */
+#define AX25_P_ATALK_ARP		0xcb	/* Appletalk ARP              */
+#define AX25_P_IP			0xcc	/* ARPA Internet Protocol     */
+#define AX25_P_ARP			0xcd	/* ARPA Address Resolution    */
+#define AX25_P_FLEXNET			0xce	/* FlexNet                    */
+#define AX25_P_NETROM 			0xcf	/* NET/ROM                    */
+#define AX25_P_TEXT 			0xF0	/* No layer 3 protocol impl.  */
+
+/* AX.25 Segment control values */
+#define	AX25_SEG_REM			0x7F
+#define	AX25_SEG_FIRST			0x80
+
+#define AX25_CBIT			0x80	/* Command/Response bit */
+#define AX25_EBIT			0x01	/* HDLC Address Extension bit */
+#define AX25_HBIT			0x80	/* Has been repeated bit */
+
+#define AX25_SSSID_SPARE		0x60	/* Unused bits in SSID for standard AX.25 */
+#define AX25_ESSID_SPARE		0x20	/* Unused bits in SSID for extended AX.25 */
+#define AX25_DAMA_FLAG			0x20	/* Well, it is *NOT* unused! (dl1bke 951121 */
+
+#define	AX25_COND_ACK_PENDING		0x01
+#define	AX25_COND_REJECT		0x02
+#define	AX25_COND_PEER_RX_BUSY		0x04
+#define	AX25_COND_OWN_RX_BUSY		0x08
+#define	AX25_COND_DAMA_MODE		0x10
+
+#ifndef _LINUX_NETDEVICE_H
+#include <linux/netdevice.h>
+#endif
+
+/* Upper sub-layer (LAPB) definitions */
+
+/* Control field templates */
+#define	AX25_I			0x00	/* Information frames */
+#define	AX25_S			0x01	/* Supervisory frames */
+#define	AX25_RR			0x01	/* Receiver ready */
+#define	AX25_RNR		0x05	/* Receiver not ready */
+#define	AX25_REJ		0x09	/* Reject */
+#define	AX25_U			0x03	/* Unnumbered frames */
+#define	AX25_SABM		0x2f	/* Set Asynchronous Balanced Mode */
+#define	AX25_SABME		0x6f	/* Set Asynchronous Balanced Mode Extended */
+#define	AX25_DISC		0x43	/* Disconnect */
+#define	AX25_DM			0x0f	/* Disconnected mode */
+#define	AX25_UA			0x63	/* Unnumbered acknowledge */
+#define	AX25_FRMR		0x87	/* Frame reject */
+#define	AX25_UI			0x03	/* Unnumbered information */
+#define	AX25_XID		0xaf	/* Exchange information */
+#define	AX25_TEST		0xe3	/* Test */
+
+#define	AX25_PF			0x10	/* Poll/final bit for standard AX.25 */
+#define	AX25_EPF		0x01	/* Poll/final bit for extended AX.25 */
+
+#define AX25_ILLEGAL		0x100	/* Impossible to be a real frame type */
+
+#define	AX25_POLLOFF		0
+#define	AX25_POLLON		1
+
+/* AX25 L2 C-bit */
+#define AX25_COMMAND		1
+#define AX25_RESPONSE		2
+
+/* Define Link State constants. */
+
+enum { 
+	AX25_STATE_0,			/* Listening */
+	AX25_STATE_1,			/* SABM sent */
+	AX25_STATE_2,			/* DISC sent */
+	AX25_STATE_3,			/* Established */
+	AX25_STATE_4			/* Recovery */
+};
+
+#define AX25_MODULUS 		8	/*  Standard AX.25 modulus */
+#define	AX25_EMODULUS		128	/*  Extended AX.25 modulus */
+
+enum {
+	AX25_PROTO_STD_SIMPLEX,
+	AX25_PROTO_STD_DUPLEX,
+#ifdef CONFIG_AX25_DAMA_SLAVE
+	AX25_PROTO_DAMA_SLAVE,
+#ifdef CONFIG_AX25_DAMA_MASTER
+	AX25_PROTO_DAMA_MASTER,
+#define AX25_PROTO_MAX AX25_PROTO_DAMA_MASTER
+#endif
+#endif
+	__AX25_PROTO_MAX,
+	AX25_PROTO_MAX = __AX25_PROTO_MAX -1
+};
+
+enum {
+	AX25_VALUES_IPDEFMODE,	/* 0=DG 1=VC */
+	AX25_VALUES_AXDEFMODE,	/* 0=Normal 1=Extended Seq Nos */
+	AX25_VALUES_BACKOFF,	/* 0=None 1=Linear 2=Exponential */
+	AX25_VALUES_CONMODE,	/* Allow connected modes - 0=No 1=no "PID text" 2=all PIDs */
+	AX25_VALUES_WINDOW,	/* Default window size for standard AX.25 */
+	AX25_VALUES_EWINDOW,	/* Default window size for extended AX.25 */
+	AX25_VALUES_T1,		/* Default T1 timeout value */
+	AX25_VALUES_T2,		/* Default T2 timeout value */
+	AX25_VALUES_T3,		/* Default T3 timeout value */
+	AX25_VALUES_IDLE,	/* Connected mode idle timer */
+	AX25_VALUES_N2,		/* Default N2 value */
+	AX25_VALUES_PACLEN,	/* AX.25 MTU */
+	AX25_VALUES_PROTOCOL,	/* Std AX.25, DAMA Slave, DAMA Master */
+	AX25_VALUES_DS_TIMEOUT,	/* DAMA Slave timeout */
+	AX25_MAX_VALUES		/* THIS MUST REMAIN THE LAST ENTRY OF THIS LIST */
+};
+
+#define	AX25_DEF_IPDEFMODE	0			/* Datagram */
+#define	AX25_DEF_AXDEFMODE	0			/* Normal */
+#define	AX25_DEF_BACKOFF	1			/* Linear backoff */
+#define	AX25_DEF_CONMODE	2			/* Connected mode allowed */
+#define	AX25_DEF_WINDOW		2			/* Window=2 */
+#define	AX25_DEF_EWINDOW	32			/* Module-128 Window=32 */
+#define	AX25_DEF_T1		10000			/* T1=10s */
+#define	AX25_DEF_T2		3000			/* T2=3s  */
+#define	AX25_DEF_T3		300000			/* T3=300s */
+#define	AX25_DEF_N2		10			/* N2=10 */
+#define AX25_DEF_IDLE		0			/* Idle=None */
+#define AX25_DEF_PACLEN		256			/* Paclen=256 */
+#define	AX25_DEF_PROTOCOL	AX25_PROTO_STD_SIMPLEX	/* Standard AX.25 */
+#define AX25_DEF_DS_TIMEOUT	180000			/* DAMA timeout 3 minutes */
+
+typedef struct ax25_uid_assoc {
+	struct hlist_node	uid_node;
+	refcount_t		refcount;
+	kuid_t			uid;
+	ax25_address		call;
+} ax25_uid_assoc;
+
+#define ax25_uid_for_each(__ax25, list) \
+	hlist_for_each_entry(__ax25, list, uid_node)
+
+#define ax25_uid_hold(ax25) \
+	refcount_inc(&((ax25)->refcount))
+
+static inline void ax25_uid_put(ax25_uid_assoc *assoc)
+{
+	if (refcount_dec_and_test(&assoc->refcount)) {
+		kfree(assoc);
+	}
+}
+
+typedef struct {
+	ax25_address		calls[AX25_MAX_DIGIS];
+	unsigned char		repeated[AX25_MAX_DIGIS];
+	unsigned char		ndigi;
+	signed char		lastrepeat;
+} ax25_digi;
+
+typedef struct ax25_route {
+	struct ax25_route	*next;
+	ax25_address		callsign;
+	struct net_device	*dev;
+	ax25_digi		*digipeat;
+	char			ip_mode;
+} ax25_route;
+
+void __ax25_put_route(ax25_route *ax25_rt);
+
+extern rwlock_t ax25_route_lock;
+
+static inline void ax25_route_lock_use(void)
+{
+	read_lock(&ax25_route_lock);
+}
+
+static inline void ax25_route_lock_unuse(void)
+{
+	read_unlock(&ax25_route_lock);
+}
+
+typedef struct {
+	char			slave;			/* slave_mode?   */
+	struct timer_list	slave_timer;		/* timeout timer */
+	unsigned short		slave_timeout;		/* when? */
+} ax25_dama_info;
+
+struct ctl_table;
+
+typedef struct ax25_dev {
+	struct ax25_dev		*next;
+
+	struct net_device	*dev;
+	netdevice_tracker	dev_tracker;
+
+	struct net_device	*forward;
+	struct ctl_table_header *sysheader;
+	int			values[AX25_MAX_VALUES];
+#if defined(CONFIG_AX25_DAMA_SLAVE) || defined(CONFIG_AX25_DAMA_MASTER)
+	ax25_dama_info		dama;
+#endif
+	refcount_t		refcount;
+	bool device_up;
+} ax25_dev;
+
+typedef struct ax25_cb {
+	struct hlist_node	ax25_node;
+	ax25_address		source_addr, dest_addr;
+	ax25_digi		*digipeat;
+	ax25_dev		*ax25_dev;
+	netdevice_tracker	dev_tracker;
+	unsigned char		iamdigi;
+	unsigned char		state, modulus, pidincl;
+	unsigned short		vs, vr, va;
+	unsigned char		condition, backoff;
+	unsigned char		n2, n2count;
+	struct timer_list	t1timer, t2timer, t3timer, idletimer;
+	unsigned long		t1, t2, t3, idle, rtt;
+	unsigned short		paclen, fragno, fraglen;
+	struct sk_buff_head	write_queue;
+	struct sk_buff_head	reseq_queue;
+	struct sk_buff_head	ack_queue;
+	struct sk_buff_head	frag_queue;
+	unsigned char		window;
+	struct timer_list	timer, dtimer;
+	struct sock		*sk;		/* Backlink to socket */
+	refcount_t		refcount;
+} ax25_cb;
+
+struct ax25_sock {
+	struct sock		sk;
+	struct ax25_cb		*cb;
+};
+
+static inline struct ax25_sock *ax25_sk(const struct sock *sk)
+{
+	return (struct ax25_sock *) sk;
+}
+
+static inline struct ax25_cb *sk_to_ax25(const struct sock *sk)
+{
+	return ax25_sk(sk)->cb;
+}
+
+#define ax25_for_each(__ax25, list) \
+	hlist_for_each_entry(__ax25, list, ax25_node)
+
+#define ax25_cb_hold(__ax25) \
+	refcount_inc(&((__ax25)->refcount))
+
+static __inline__ void ax25_cb_put(ax25_cb *ax25)
+{
+	if (refcount_dec_and_test(&ax25->refcount)) {
+		kfree(ax25->digipeat);
+		kfree(ax25);
+	}
+}
+
+static inline void ax25_dev_hold(ax25_dev *ax25_dev)
+{
+	refcount_inc(&ax25_dev->refcount);
+}
+
+static inline void ax25_dev_put(ax25_dev *ax25_dev)
+{
+	if (refcount_dec_and_test(&ax25_dev->refcount)) {
+		kfree(ax25_dev);
+	}
+}
+static inline __be16 ax25_type_trans(struct sk_buff *skb, struct net_device *dev)
+{
+	skb->dev      = dev;
+	skb_reset_mac_header(skb);
+	skb->pkt_type = PACKET_HOST;
+	return htons(ETH_P_AX25);
+}
+
+/* af_ax25.c */
+extern struct hlist_head ax25_list;
+extern spinlock_t ax25_list_lock;
+void ax25_cb_add(ax25_cb *);
+struct sock *ax25_find_listener(ax25_address *, int, struct net_device *, int);
+struct sock *ax25_get_socket(ax25_address *, ax25_address *, int);
+ax25_cb *ax25_find_cb(const ax25_address *, ax25_address *, ax25_digi *,
+		      struct net_device *);
+void ax25_send_to_raw(ax25_address *, struct sk_buff *, int);
+void ax25_destroy_socket(ax25_cb *);
+ax25_cb * __must_check ax25_create_cb(void);
+void ax25_fillin_cb(ax25_cb *, ax25_dev *);
+struct sock *ax25_make_new(struct sock *, struct ax25_dev *);
+
+/* ax25_addr.c */
+extern const ax25_address ax25_bcast;
+extern const ax25_address ax25_defaddr;
+extern const ax25_address null_ax25_address;
+char *ax2asc(char *buf, const ax25_address *);
+void asc2ax(ax25_address *addr, const char *callsign);
+int ax25cmp(const ax25_address *, const ax25_address *);
+int ax25digicmp(const ax25_digi *, const ax25_digi *);
+const unsigned char *ax25_addr_parse(const unsigned char *, int,
+	ax25_address *, ax25_address *, ax25_digi *, int *, int *);
+int ax25_addr_build(unsigned char *, const ax25_address *,
+		    const ax25_address *, const ax25_digi *, int, int);
+int ax25_addr_size(const ax25_digi *);
+void ax25_digi_invert(const ax25_digi *, ax25_digi *);
+
+/* ax25_dev.c */
+extern ax25_dev *ax25_dev_list;
+extern spinlock_t ax25_dev_lock;
+
+#if IS_ENABLED(CONFIG_AX25)
+static inline ax25_dev *ax25_dev_ax25dev(struct net_device *dev)
+{
+	return dev->ax25_ptr;
+}
+#endif
+
+ax25_dev *ax25_addr_ax25dev(ax25_address *);
+void ax25_dev_device_up(struct net_device *);
+void ax25_dev_device_down(struct net_device *);
+int ax25_fwd_ioctl(unsigned int, struct ax25_fwd_struct *);
+struct net_device *ax25_fwd_dev(struct net_device *);
+void ax25_dev_free(void);
+
+/* ax25_ds_in.c */
+int ax25_ds_frame_in(ax25_cb *, struct sk_buff *, int);
+
+/* ax25_ds_subr.c */
+void ax25_ds_nr_error_recovery(ax25_cb *);
+void ax25_ds_enquiry_response(ax25_cb *);
+void ax25_ds_establish_data_link(ax25_cb *);
+void ax25_dev_dama_off(ax25_dev *);
+void ax25_dama_on(ax25_cb *);
+void ax25_dama_off(ax25_cb *);
+
+/* ax25_ds_timer.c */
+void ax25_ds_setup_timer(ax25_dev *);
+void ax25_ds_set_timer(ax25_dev *);
+void ax25_ds_del_timer(ax25_dev *);
+void ax25_ds_timer(ax25_cb *);
+void ax25_ds_t1_timeout(ax25_cb *);
+void ax25_ds_heartbeat_expiry(ax25_cb *);
+void ax25_ds_t3timer_expiry(ax25_cb *);
+void ax25_ds_idletimer_expiry(ax25_cb *);
+
+/* ax25_iface.c */
+
+struct ax25_protocol {
+	struct ax25_protocol *next;
+	unsigned int pid;
+	int (*func)(struct sk_buff *, ax25_cb *);
+};
+
+void ax25_register_pid(struct ax25_protocol *ap);
+void ax25_protocol_release(unsigned int);
+
+struct ax25_linkfail {
+	struct hlist_node lf_node;
+	void (*func)(ax25_cb *, int);
+};
+
+void ax25_linkfail_register(struct ax25_linkfail *lf);
+void ax25_linkfail_release(struct ax25_linkfail *lf);
+int __must_check ax25_listen_register(const ax25_address *,
+				      struct net_device *);
+void ax25_listen_release(const ax25_address *, struct net_device *);
+int(*ax25_protocol_function(unsigned int))(struct sk_buff *, ax25_cb *);
+int ax25_listen_mine(const ax25_address *, struct net_device *);
+void ax25_link_failed(ax25_cb *, int);
+int ax25_protocol_is_registered(unsigned int);
+
+/* ax25_in.c */
+int ax25_rx_iframe(ax25_cb *, struct sk_buff *);
+int ax25_kiss_rcv(struct sk_buff *, struct net_device *, struct packet_type *,
+		  struct net_device *);
+
+/* ax25_ip.c */
+netdev_tx_t ax25_ip_xmit(struct sk_buff *skb);
+extern const struct header_ops ax25_header_ops;
+
+/* ax25_out.c */
+ax25_cb *ax25_send_frame(struct sk_buff *, int, const ax25_address *,
+			 ax25_address *, ax25_digi *, struct net_device *);
+void ax25_output(ax25_cb *, int, struct sk_buff *);
+void ax25_kick(ax25_cb *);
+void ax25_transmit_buffer(ax25_cb *, struct sk_buff *, int);
+void ax25_queue_xmit(struct sk_buff *skb, struct net_device *dev);
+int ax25_check_iframes_acked(ax25_cb *, unsigned short);
+
+/* ax25_route.c */
+void ax25_rt_device_down(struct net_device *);
+int ax25_rt_ioctl(unsigned int, void __user *);
+extern const struct seq_operations ax25_rt_seqops;
+ax25_route *ax25_get_route(ax25_address *addr, struct net_device *dev);
+int ax25_rt_autobind(ax25_cb *, ax25_address *);
+struct sk_buff *ax25_rt_build_path(struct sk_buff *, ax25_address *,
+				   ax25_address *, ax25_digi *);
+void ax25_rt_free(void);
+
+/* ax25_std_in.c */
+int ax25_std_frame_in(ax25_cb *, struct sk_buff *, int);
+
+/* ax25_std_subr.c */
+void ax25_std_nr_error_recovery(ax25_cb *);
+void ax25_std_establish_data_link(ax25_cb *);
+void ax25_std_transmit_enquiry(ax25_cb *);
+void ax25_std_enquiry_response(ax25_cb *);
+void ax25_std_timeout_response(ax25_cb *);
+
+/* ax25_std_timer.c */
+void ax25_std_heartbeat_expiry(ax25_cb *);
+void ax25_std_t1timer_expiry(ax25_cb *);
+void ax25_std_t2timer_expiry(ax25_cb *);
+void ax25_std_t3timer_expiry(ax25_cb *);
+void ax25_std_idletimer_expiry(ax25_cb *);
+
+/* ax25_subr.c */
+void ax25_clear_queues(ax25_cb *);
+void ax25_frames_acked(ax25_cb *, unsigned short);
+void ax25_requeue_frames(ax25_cb *);
+int ax25_validate_nr(ax25_cb *, unsigned short);
+int ax25_decode(ax25_cb *, struct sk_buff *, int *, int *, int *);
+void ax25_send_control(ax25_cb *, int, int, int);
+void ax25_return_dm(struct net_device *, ax25_address *, ax25_address *,
+		    ax25_digi *);
+void ax25_calculate_t1(ax25_cb *);
+void ax25_calculate_rtt(ax25_cb *);
+void ax25_disconnect(ax25_cb *, int);
+
+/* ax25_timer.c */
+void ax25_setup_timers(ax25_cb *);
+void ax25_start_heartbeat(ax25_cb *);
+void ax25_start_t1timer(ax25_cb *);
+void ax25_start_t2timer(ax25_cb *);
+void ax25_start_t3timer(ax25_cb *);
+void ax25_start_idletimer(ax25_cb *);
+void ax25_stop_heartbeat(ax25_cb *);
+void ax25_stop_t1timer(ax25_cb *);
+void ax25_stop_t2timer(ax25_cb *);
+void ax25_stop_t3timer(ax25_cb *);
+void ax25_stop_idletimer(ax25_cb *);
+int ax25_t1timer_running(ax25_cb *);
+unsigned long ax25_display_timer(struct timer_list *);
+
+/* ax25_uid.c */
+extern int  ax25_uid_policy;
+ax25_uid_assoc *ax25_findbyuid(kuid_t);
+int __must_check ax25_uid_ioctl(int, struct sockaddr_ax25 *);
+extern const struct seq_operations ax25_uid_seqops;
+void ax25_uid_free(void);
+
+/* sysctl_net_ax25.c */
+#ifdef CONFIG_SYSCTL
+int ax25_register_dev_sysctl(ax25_dev *ax25_dev);
+void ax25_unregister_dev_sysctl(ax25_dev *ax25_dev);
+#else
+static inline int ax25_register_dev_sysctl(ax25_dev *ax25_dev) { return 0; }
+static inline void ax25_unregister_dev_sysctl(ax25_dev *ax25_dev) {}
+#endif /* CONFIG_SYSCTL */
+
+#endif