Merge tag 'uml-for-linux-6.16-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/uml/linux

Pull UML updates from Johannes Berg:
 "The only really new thing is the long-standing seccomp work
  (originally from 2021!). Wven if it still isn't enabled by default due
  to security concerns it can still be used e.g. for tests.

   - remove obsolete network transports

   - remove PCI IO port support

   - start adding seccomp-based process handling instead of ptrace"

* tag 'uml-for-linux-6.16-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/uml/linux: (29 commits)
  um: remove "extern" from implementation of sigchld_handler
  um: fix unused variable warning
  um: fix SECCOMP 32bit xstate register restore
  um: pass FD for memory operations when needed
  um: Add SECCOMP support detection and initialization
  um: Implement kernel side of SECCOMP based process handling
  um: Track userspace children dying in SECCOMP mode
  um: Add helper functions to get/set state for SECCOMP
  um: Add stub side of SECCOMP/futex based process handling
  um: Move faultinfo extraction into userspace routine
  um: vector: Use mac_pton() for MAC address parsing
  um: vector: Clean up and modernize log messages
  um: chan_kern: use raw spinlock for irqs_to_free_lock
  MAINTAINERS: remove obsolete file entry in TUN/TAP DRIVER
  um: Fix tgkill compile error on old host OSes
  um: stop using PCI port I/O
  um: Remove legacy network transport infrastructure
  um: vector: Eliminate the dependency on uml_net
  um: Remove obsolete legacy network transports
  um/asm: Replace "REP; NOP" with PAUSE mnemonic
  ...

1 files changed, 0 insertions, 248 deletions

diff --git a/arch/um/os-Linux/drivers/ethertap_user.c b/arch/um/os-Linux/drivers/ethertap_user.c
deleted file mode 100644
index bdf215c0eca7..000000000000
--- a/arch/um/os-Linux/drivers/ethertap_user.c
+++ /dev/null
@@ -1,248 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-/*
- * Copyright (C) 2001 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
- * Copyright (C) 2001 Lennert Buytenhek (buytenh@gnu.org) and
- * James Leu (jleu@mindspring.net).
- * Copyright (C) 2001 by various other people who didn't put their name here.
- */
-
-#include <stdio.h>
-#include <unistd.h>
-#include <errno.h>
-#include <string.h>
-#include <sys/socket.h>
-#include <sys/wait.h>
-#include "etap.h"
-#include <os.h>
-#include <net_user.h>
-#include <um_malloc.h>
-
-#define MAX_PACKET ETH_MAX_PACKET
-
-static int etap_user_init(void *data, void *dev)
-{
-	struct ethertap_data *pri = data;
-
-	pri->dev = dev;
-	return 0;
-}
-
-struct addr_change {
-	enum { ADD_ADDR, DEL_ADDR } what;
-	unsigned char addr[4];
-	unsigned char netmask[4];
-};
-
-static void etap_change(int op, unsigned char *addr, unsigned char *netmask,
-			int fd)
-{
-	struct addr_change change;
-	char *output;
-	int n;
-
-	change.what = op;
-	memcpy(change.addr, addr, sizeof(change.addr));
-	memcpy(change.netmask, netmask, sizeof(change.netmask));
-	CATCH_EINTR(n = write(fd, &change, sizeof(change)));
-	if (n != sizeof(change)) {
-		printk(UM_KERN_ERR "etap_change - request failed, err = %d\n",
-		       errno);
-		return;
-	}
-
-	output = uml_kmalloc(UM_KERN_PAGE_SIZE, UM_GFP_KERNEL);
-	if (output == NULL)
-		printk(UM_KERN_ERR "etap_change : Failed to allocate output "
-		       "buffer\n");
-	read_output(fd, output, UM_KERN_PAGE_SIZE);
-	if (output != NULL) {
-		printk("%s", output);
-		kfree(output);
-	}
-}
-
-static void etap_open_addr(unsigned char *addr, unsigned char *netmask,
-			   void *arg)
-{
-	etap_change(ADD_ADDR, addr, netmask, *((int *) arg));
-}
-
-static void etap_close_addr(unsigned char *addr, unsigned char *netmask,
-			    void *arg)
-{
-	etap_change(DEL_ADDR, addr, netmask, *((int *) arg));
-}
-
-struct etap_pre_exec_data {
-	int control_remote;
-	int control_me;
-	int data_me;
-};
-
-static void etap_pre_exec(void *arg)
-{
-	struct etap_pre_exec_data *data = arg;
-
-	dup2(data->control_remote, 1);
-	close(data->data_me);
-	close(data->control_me);
-}
-
-static int etap_tramp(char *dev, char *gate, int control_me,
-		      int control_remote, int data_me, int data_remote)
-{
-	struct etap_pre_exec_data pe_data;
-	int pid, err, n;
-	char version_buf[sizeof("nnnnn\0")];
-	char data_fd_buf[sizeof("nnnnnn\0")];
-	char gate_buf[sizeof("nnn.nnn.nnn.nnn\0")];
-	char *setup_args[] = { "uml_net", version_buf, "ethertap", dev,
-			       data_fd_buf, gate_buf, NULL };
-	char *nosetup_args[] = { "uml_net", version_buf, "ethertap",
-				 dev, data_fd_buf, NULL };
-	char **args, c;
-
-	sprintf(data_fd_buf, "%d", data_remote);
-	sprintf(version_buf, "%d", UML_NET_VERSION);
-	if (gate != NULL) {
-		strscpy(gate_buf, gate);
-		args = setup_args;
-	}
-	else args = nosetup_args;
-
-	err = 0;
-	pe_data.control_remote = control_remote;
-	pe_data.control_me = control_me;
-	pe_data.data_me = data_me;
-	pid = run_helper(etap_pre_exec, &pe_data, args);
-
-	if (pid < 0)
-		err = pid;
-	close(data_remote);
-	close(control_remote);
-	CATCH_EINTR(n = read(control_me, &c, sizeof(c)));
-	if (n != sizeof(c)) {
-		err = -errno;
-		printk(UM_KERN_ERR "etap_tramp : read of status failed, "
-		       "err = %d\n", -err);
-		return err;
-	}
-	if (c != 1) {
-		printk(UM_KERN_ERR "etap_tramp : uml_net failed\n");
-		err = helper_wait(pid);
-	}
-	return err;
-}
-
-static int etap_open(void *data)
-{
-	struct ethertap_data *pri = data;
-	char *output;
-	int data_fds[2], control_fds[2], err, output_len;
-
-	err = tap_open_common(pri->dev, pri->gate_addr);
-	if (err)
-		return err;
-
-	err = socketpair(AF_UNIX, SOCK_DGRAM, 0, data_fds);
-	if (err) {
-		err = -errno;
-		printk(UM_KERN_ERR "etap_open - data socketpair failed - "
-		       "err = %d\n", errno);
-		return err;
-	}
-
-	err = socketpair(AF_UNIX, SOCK_STREAM, 0, control_fds);
-	if (err) {
-		err = -errno;
-		printk(UM_KERN_ERR "etap_open - control socketpair failed - "
-		       "err = %d\n", errno);
-		goto out_close_data;
-	}
-
-	err = etap_tramp(pri->dev_name, pri->gate_addr, control_fds[0],
-			 control_fds[1], data_fds[0], data_fds[1]);
-	output_len = UM_KERN_PAGE_SIZE;
-	output = uml_kmalloc(output_len, UM_GFP_KERNEL);
-	read_output(control_fds[0], output, output_len);
-
-	if (output == NULL)
-		printk(UM_KERN_ERR "etap_open : failed to allocate output "
-		       "buffer\n");
-	else {
-		printk("%s", output);
-		kfree(output);
-	}
-
-	if (err < 0) {
-		printk(UM_KERN_ERR "etap_tramp failed - err = %d\n", -err);
-		goto out_close_control;
-	}
-
-	pri->data_fd = data_fds[0];
-	pri->control_fd = control_fds[0];
-	iter_addresses(pri->dev, etap_open_addr, &pri->control_fd);
-	return data_fds[0];
-
-out_close_control:
-	close(control_fds[0]);
-	close(control_fds[1]);
-out_close_data:
-	close(data_fds[0]);
-	close(data_fds[1]);
-	return err;
-}
-
-static void etap_close(int fd, void *data)
-{
-	struct ethertap_data *pri = data;
-
-	iter_addresses(pri->dev, etap_close_addr, &pri->control_fd);
-	close(fd);
-
-	if (shutdown(pri->data_fd, SHUT_RDWR) < 0)
-		printk(UM_KERN_ERR "etap_close - shutdown data socket failed, "
-		       "errno = %d\n", errno);
-
-	if (shutdown(pri->control_fd, SHUT_RDWR) < 0)
-		printk(UM_KERN_ERR "etap_close - shutdown control socket "
-		       "failed, errno = %d\n", errno);
-
-	close(pri->data_fd);
-	pri->data_fd = -1;
-	close(pri->control_fd);
-	pri->control_fd = -1;
-}
-
-static void etap_add_addr(unsigned char *addr, unsigned char *netmask,
-			  void *data)
-{
-	struct ethertap_data *pri = data;
-
-	tap_check_ips(pri->gate_addr, addr);
-	if (pri->control_fd == -1)
-		return;
-	etap_open_addr(addr, netmask, &pri->control_fd);
-}
-
-static void etap_del_addr(unsigned char *addr, unsigned char *netmask,
-			  void *data)
-{
-	struct ethertap_data *pri = data;
-
-	if (pri->control_fd == -1)
-		return;
-
-	etap_close_addr(addr, netmask, &pri->control_fd);
-}
-
-const struct net_user_info ethertap_user_info = {
-	.init		= etap_user_init,
-	.open		= etap_open,
-	.close	 	= etap_close,
-	.remove	 	= NULL,
-	.add_address	= etap_add_addr,
-	.delete_address = etap_del_addr,
-	.mtu		= ETH_MAX_PACKET,
-	.max_packet	= ETH_MAX_PACKET + ETH_HEADER_ETHERTAP,
-};