net: remove ax25 and amateur radio (hamradio) subsystem

Remove the amateur radio (AX.25, NET/ROM, ROSE) protocol implementation
and all associated hamradio device drivers from the kernel tree.
This set of protocols has long been a huge bug/syzbot magnet,
and since nobody stepped up to help us deal with the influx
of the AI-generated bug reports we need to move it out of tree
to protect our sanity.

The code is moved to an out-of-tree repo:
https://github.com/linux-netdev/mod-orphan
if it's cleaned up and reworked there we can accept it back.

Minimal stub headers are kept for include/net/ax25.h (AX25_P_IP,
AX25_ADDR_LEN, ax25_address) and include/net/rose.h (ROSE_ADDR_LEN)
so that the conditional integration code in arp.c and tun.c continues
to compile and work when the out-of-tree modules are loaded.

Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Acked-by: Stephen Hemminger <stephen@networkplumber.org>
Acked-by: Carlos Bilbao <carlos.bilbao@kernel.org>
Reviewed-by: Simon Horman <horms@kernel.org>
Reviewed-by: Kuniyuki Iwashima <kuniyu@google.com>
Acked-by: Toke Høiland-Jørgensen <toke@toke.dk>
Link: https://patch.msgid.link/20260421021824.1293976-1-kuba@kernel.org
Signed-off-by: Paolo Abeni <pabeni@redhat.com>

5 files changed, 0 insertions, 453 deletions

diff --git a/include/uapi/linux/baycom.h b/include/uapi/linux/baycom.h
deleted file mode 100644
index 478cb565ae52..000000000000
--- a/include/uapi/linux/baycom.h
+++ /dev/null
@@ -1,40 +0,0 @@
-/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
-/*
- * The Linux BAYCOM driver for the Baycom serial 1200 baud modem
- * and the parallel 9600 baud modem
- * (C) 1997-1998 by Thomas Sailer, HB9JNX/AE4WA
- */
-
-#ifndef _BAYCOM_H
-#define _BAYCOM_H
-
-/* -------------------------------------------------------------------- */
-/*
- * structs for the IOCTL commands
- */
-
-struct baycom_debug_data {
-	unsigned long debug1;
-	unsigned long debug2;
-	long debug3;
-};
-
-struct baycom_ioctl {
-	int cmd;
-	union {
-		struct baycom_debug_data dbg;
-	} data;
-};
-
-/* -------------------------------------------------------------------- */
-
-/*
- * ioctl values change for baycom
- */
-#define BAYCOMCTL_GETDEBUG       0x92
-
-/* -------------------------------------------------------------------- */
-
-#endif /* _BAYCOM_H */
-
-/* --------------------------------------------------------------------- */
diff --git a/include/uapi/linux/hdlcdrv.h b/include/uapi/linux/hdlcdrv.h
deleted file mode 100644
index 9fe9499403a6..000000000000
--- a/include/uapi/linux/hdlcdrv.h
+++ /dev/null
@@ -1,111 +0,0 @@
-/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
-/*
- * hdlcdrv.h  -- HDLC packet radio network driver.
- * The Linux soundcard driver for 1200 baud and 9600 baud packet radio
- * (C) 1996-1998 by Thomas Sailer, HB9JNX/AE4WA
- */
-
-#ifndef _UAPI_HDLCDRV_H
-#define _UAPI_HDLCDRV_H
-
-/* -------------------------------------------------------------------- */
-/*
- * structs for the IOCTL commands
- */
-
-struct hdlcdrv_params {
-	int iobase;
-	int irq;
-	int dma;
-	int dma2;
-	int seriobase;
-	int pariobase;
-	int midiiobase;
-};	
-
-struct hdlcdrv_channel_params {
-	int tx_delay;  /* the transmitter keyup delay in 10ms units */
-	int tx_tail;   /* the transmitter keyoff delay in 10ms units */
-	int slottime;  /* the slottime in 10ms; usually 10 = 100ms */
-	int ppersist;  /* the p-persistence 0..255 */
-	int fulldup;   /* some driver do not support full duplex, setting */
-	               /* this just makes them send even if DCD is on */
-};	
-
-struct hdlcdrv_old_channel_state {
-  	int ptt;
-  	int dcd;
-  	int ptt_keyed;
-};
-
-struct hdlcdrv_channel_state {
- 	int ptt;
- 	int dcd;
- 	int ptt_keyed;
- 	unsigned long tx_packets;
- 	unsigned long tx_errors;
- 	unsigned long rx_packets;
- 	unsigned long rx_errors;
-};
-
-struct hdlcdrv_ioctl {
-	int cmd;
-	union {
-		struct hdlcdrv_params mp;
-		struct hdlcdrv_channel_params cp;
-		struct hdlcdrv_channel_state cs;
-		struct hdlcdrv_old_channel_state ocs;
-		unsigned int calibrate;
-		unsigned char bits;
-		char modename[128];
-		char drivername[32];
-	} data;
-};
-
-/* -------------------------------------------------------------------- */
-
-/*
- * ioctl values
- */
-#define HDLCDRVCTL_GETMODEMPAR       0
-#define HDLCDRVCTL_SETMODEMPAR       1
-#define HDLCDRVCTL_MODEMPARMASK      2  /* not handled by hdlcdrv */
-#define HDLCDRVCTL_GETCHANNELPAR    10
-#define HDLCDRVCTL_SETCHANNELPAR    11
-#define HDLCDRVCTL_OLDGETSTAT       20
-#define HDLCDRVCTL_CALIBRATE        21
-#define HDLCDRVCTL_GETSTAT          22
-
-/*
- * these are mainly for debugging purposes
- */
-#define HDLCDRVCTL_GETSAMPLES       30
-#define HDLCDRVCTL_GETBITS          31
-
-/*
- * not handled by hdlcdrv, but by its depending drivers
- */
-#define HDLCDRVCTL_GETMODE          40
-#define HDLCDRVCTL_SETMODE          41
-#define HDLCDRVCTL_MODELIST         42
-#define HDLCDRVCTL_DRIVERNAME       43
-
-/*
- * mask of needed modem parameters, returned by HDLCDRVCTL_MODEMPARMASK
- */
-#define HDLCDRV_PARMASK_IOBASE      (1<<0)
-#define HDLCDRV_PARMASK_IRQ         (1<<1)
-#define HDLCDRV_PARMASK_DMA         (1<<2)
-#define HDLCDRV_PARMASK_DMA2        (1<<3)
-#define HDLCDRV_PARMASK_SERIOBASE   (1<<4)
-#define HDLCDRV_PARMASK_PARIOBASE   (1<<5)
-#define HDLCDRV_PARMASK_MIDIIOBASE  (1<<6)
-
-/* -------------------------------------------------------------------- */
-
-
-/* -------------------------------------------------------------------- */
-
-#endif /* _UAPI_HDLCDRV_H */
-
-/* -------------------------------------------------------------------- */
diff --git a/include/uapi/linux/netrom.h b/include/uapi/linux/netrom.h
deleted file mode 100644
index 7498ea3c3940..000000000000
--- a/include/uapi/linux/netrom.h
+++ /dev/null
@@ -1,37 +0,0 @@
-/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
-/*
- * These are the public elements of the Linux kernel NET/ROM implementation.
- * For kernel AX.25 see the file ax25.h. This file requires ax25.h for the
- * definition of the ax25_address structure.
- */
-
-#ifndef	NETROM_KERNEL_H
-#define	NETROM_KERNEL_H
-
-#include <linux/ax25.h>
-
-#define NETROM_MTU	236
-
-#define NETROM_T1	1
-#define NETROM_T2	2
-#define NETROM_N2	3
-#define	NETROM_T4	6
-#define	NETROM_IDLE	7
-
-#define	SIOCNRDECOBS		(SIOCPROTOPRIVATE+2)
-
-struct nr_route_struct {
-#define	NETROM_NEIGH	0
-#define	NETROM_NODE	1
-	int		type;
-	ax25_address	callsign;
-	char		device[16];
-	unsigned int	quality;
-	char		mnemonic[7];
-	ax25_address	neighbour;
-	unsigned int	obs_count;
-	unsigned int	ndigis;
-	ax25_address	digipeaters[AX25_MAX_DIGIS];
-};
-
-#endif
diff --git a/include/uapi/linux/rose.h b/include/uapi/linux/rose.h
deleted file mode 100644
index 19aa4693c8fc..000000000000
--- a/include/uapi/linux/rose.h
+++ /dev/null
@@ -1,91 +0,0 @@
-/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
-/*
- * These are the public elements of the Linux kernel Rose implementation.
- * For kernel AX.25 see the file ax25.h. This file requires ax25.h for the
- * definition of the ax25_address structure.
- */
-
-#ifndef	ROSE_KERNEL_H
-#define	ROSE_KERNEL_H
-
-#include <linux/socket.h>
-#include <linux/ax25.h>
-
-#define ROSE_MTU	251
-
-#define ROSE_MAX_DIGIS 6
-
-#define	ROSE_DEFER	1
-#define ROSE_T1		2
-#define	ROSE_T2		3
-#define	ROSE_T3		4
-#define	ROSE_IDLE	5
-#define	ROSE_QBITINCL	6
-#define	ROSE_HOLDBACK	7
-
-#define	SIOCRSGCAUSE		(SIOCPROTOPRIVATE+0)
-#define	SIOCRSSCAUSE		(SIOCPROTOPRIVATE+1)
-#define	SIOCRSL2CALL		(SIOCPROTOPRIVATE+2)
-#define	SIOCRSSL2CALL		(SIOCPROTOPRIVATE+2)
-#define	SIOCRSACCEPT		(SIOCPROTOPRIVATE+3)
-#define	SIOCRSCLRRT		(SIOCPROTOPRIVATE+4)
-#define	SIOCRSGL2CALL		(SIOCPROTOPRIVATE+5)
-#define	SIOCRSGFACILITIES	(SIOCPROTOPRIVATE+6)
-
-#define	ROSE_DTE_ORIGINATED	0x00
-#define	ROSE_NUMBER_BUSY	0x01
-#define	ROSE_INVALID_FACILITY	0x03
-#define	ROSE_NETWORK_CONGESTION	0x05
-#define	ROSE_OUT_OF_ORDER	0x09
-#define	ROSE_ACCESS_BARRED	0x0B
-#define	ROSE_NOT_OBTAINABLE	0x0D
-#define	ROSE_REMOTE_PROCEDURE	0x11
-#define	ROSE_LOCAL_PROCEDURE	0x13
-#define	ROSE_SHIP_ABSENT	0x39
-
-typedef struct {
-	char		rose_addr[5];
-} rose_address;
-
-struct sockaddr_rose {
-	__kernel_sa_family_t srose_family;
-	rose_address	srose_addr;
-	ax25_address	srose_call;
-	int		srose_ndigis;
-	ax25_address	srose_digi;
-};
-
-struct full_sockaddr_rose {
-	__kernel_sa_family_t srose_family;
-	rose_address	srose_addr;
-	ax25_address	srose_call;
-	unsigned int	srose_ndigis;
-	ax25_address	srose_digis[ROSE_MAX_DIGIS];
-};
-
-struct rose_route_struct {
-	rose_address	address;
-	unsigned short	mask;
-	ax25_address	neighbour;
-	char		device[16];
-	unsigned char	ndigis;
-	ax25_address	digipeaters[AX25_MAX_DIGIS];
-};
-
-struct rose_cause_struct {
-	unsigned char	cause;
-	unsigned char	diagnostic;
-};
-
-struct rose_facilities_struct {
-	rose_address	source_addr,   dest_addr;
-	ax25_address	source_call,   dest_call;
-	unsigned char	source_ndigis, dest_ndigis;
-	ax25_address	source_digis[ROSE_MAX_DIGIS];
-	ax25_address	dest_digis[ROSE_MAX_DIGIS];
-	unsigned int	rand;
-	rose_address	fail_addr;
-	ax25_address	fail_call;
-};
-
-#endif
diff --git a/include/uapi/linux/scc.h b/include/uapi/linux/scc.h
deleted file mode 100644
index 947edb17ce9d..000000000000
--- a/include/uapi/linux/scc.h
+++ /dev/null
@@ -1,174 +0,0 @@
-/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
-/* $Id: scc.h,v 1.29 1997/04/02 14:56:45 jreuter Exp jreuter $ */
-
-#ifndef _UAPI_SCC_H
-#define _UAPI_SCC_H
-
-#include <linux/sockios.h>
-
-/* selection of hardware types */
-
-#define PA0HZP		0x00	/* hardware type for PA0HZP SCC card and compatible */
-#define EAGLE		0x01    /* hardware type for EAGLE card */
-#define PC100		0x02	/* hardware type for PC100 card */
-#define PRIMUS		0x04	/* hardware type for PRIMUS-PC (DG9BL) card */
-#define DRSI		0x08	/* hardware type for DRSI PC*Packet card */
-#define BAYCOM		0x10	/* hardware type for BayCom (U)SCC */
-
-/* DEV ioctl() commands */
-
-enum SCC_ioctl_cmds {
-	SIOCSCCRESERVED = SIOCDEVPRIVATE,
-	SIOCSCCCFG,
-	SIOCSCCINI,
-	SIOCSCCCHANINI,
-	SIOCSCCSMEM,
-	SIOCSCCGKISS,
-	SIOCSCCSKISS,
-	SIOCSCCGSTAT,
-	SIOCSCCCAL
-};
-
-/* Device parameter control (from WAMPES) */
-
-enum L1_params {
-	PARAM_DATA,
-	PARAM_TXDELAY,
-	PARAM_PERSIST,
-	PARAM_SLOTTIME,
-	PARAM_TXTAIL,
-	PARAM_FULLDUP,
-	PARAM_SOFTDCD,		/* was: PARAM_HW */
-	PARAM_MUTE,		/* ??? */
-	PARAM_DTR,
-	PARAM_RTS,
-	PARAM_SPEED,
-	PARAM_ENDDELAY,		/* ??? */
-	PARAM_GROUP,
-	PARAM_IDLE,
-	PARAM_MIN,
-	PARAM_MAXKEY,
-	PARAM_WAIT,
-	PARAM_MAXDEFER,
-	PARAM_TX,
-	PARAM_HWEVENT = 31,
-	PARAM_RETURN = 255	/* reset kiss mode */
-};
-
-/* fulldup parameter */
-
-enum FULLDUP_modes {
-	KISS_DUPLEX_HALF,	/* normal CSMA operation */
-	KISS_DUPLEX_FULL,	/* fullduplex, key down trx after transmission */
-	KISS_DUPLEX_LINK,	/* fullduplex, key down trx after 'idletime' sec */
-	KISS_DUPLEX_OPTIMA	/* fullduplex, let the protocol layer control the hw */
-};
-
-/* misc. parameters */
-
-#define TIMER_OFF	65535U	/* to switch off timers */
-#define NO_SUCH_PARAM	65534U	/* param not implemented */
-
-/* HWEVENT parameter */
-
-enum HWEVENT_opts {
-	HWEV_DCD_ON,
-	HWEV_DCD_OFF,
-	HWEV_ALL_SENT
-};
-
-/* channel grouping */
-
-#define RXGROUP		0100	/* if set, only tx when all channels clear */
-#define TXGROUP		0200	/* if set, don't transmit simultaneously */
-
-/* Tx/Rx clock sources */
-
-enum CLOCK_sources {
-	CLK_DPLL,	/* normal halfduplex operation */
-	CLK_EXTERNAL,	/* external clocking (G3RUH/DF9IC modems) */
-	CLK_DIVIDER,	/* Rx = DPLL, Tx = divider (fullduplex with */
-			/* modems without clock regeneration */
-	CLK_BRG		/* experimental fullduplex mode with DPLL/BRG for */
-			/* MODEMs without clock recovery */
-};
-
-/* Tx state */
-
-enum TX_state {
-	TXS_IDLE,	/* Transmitter off, no data pending */
-	TXS_BUSY,	/* waiting for permission to send / tailtime */
-	TXS_ACTIVE,	/* Transmitter on, sending data */
-	TXS_NEWFRAME,	/* reset CRC and send (next) frame */
-	TXS_IDLE2,	/* Transmitter on, no data pending */
-	TXS_WAIT,	/* Waiting for Mintime to expire */
-	TXS_TIMEOUT	/* We had a transmission timeout */
-};
-
-typedef unsigned long io_port;	/* type definition for an 'io port address' */
-
-/* SCC statistical information */
-
-struct scc_stat {
-        long rxints;            /* Receiver interrupts */
-        long txints;            /* Transmitter interrupts */
-        long exints;            /* External/status interrupts */
-        long spints;            /* Special receiver interrupts */
-
-        long txframes;          /* Packets sent */
-        long rxframes;          /* Number of Frames Actually Received */
-        long rxerrs;            /* CRC Errors */
-        long txerrs;		/* KISS errors */
-        
-	unsigned int nospace;	/* "Out of buffers" */
-	unsigned int rx_over;	/* Receiver Overruns */
-	unsigned int tx_under;	/* Transmitter Underruns */
-
-	unsigned int tx_state;	/* Transmitter state */
-	int tx_queued;		/* tx frames enqueued */
-
-	unsigned int maxqueue;	/* allocated tx_buffers */
-	unsigned int bufsize;	/* used buffersize */
-};
-
-struct scc_modem {
-	long speed;		/* Line speed, bps */
-	char clocksrc;		/* 0 = DPLL, 1 = external, 2 = divider */
-	char nrz;		/* NRZ instead of NRZI */	
-};
-
-struct scc_kiss_cmd {
-	int  	 command;	/* one of the KISS-Commands defined above */
-	unsigned param;		/* KISS-Param */
-};
-
-struct scc_hw_config {
-	io_port data_a;		/* data port channel A */
-	io_port ctrl_a;		/* control port channel A */
-	io_port data_b;		/* data port channel B */
-	io_port ctrl_b;		/* control port channel B */
-	io_port vector_latch;	/* INTACK-Latch (#) */
-	io_port	special;	/* special function port */
-
-	int	irq;		/* irq */
-	long	clock;		/* clock */
-	char	option;		/* command for function port */
-
-	char brand;		/* hardware type */
-	char escc;		/* use ext. features of a 8580/85180/85280 */
-};
-
-/* (#) only one INTACK latch allowed. */
-
-
-struct scc_mem_config {
-	unsigned int dummy;
-	unsigned int bufsize;
-};
-
-struct scc_calibrate {
-	unsigned int time;
-	unsigned char pattern;
-};
-
-#endif /* _UAPI_SCC_H */