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>

1 files changed, 0 insertions, 111 deletions

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 */
-
-/* -------------------------------------------------------------------- */