1 // SPDX-License-Identifier: GPL-2.0
3  * Copyright (C) 2001 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
24 	pri->dev = dev;  in tuntap_user_init()
33 	tap_check_ips(pri->gate_addr, addr);  in tuntap_add_addr()
34 	if ((pri->fd == -1) || pri->fixed_config)  in tuntap_add_addr()
36 	open_addr(addr, netmask, pri->dev_name);  in tuntap_add_addr()
44 	if ((pri->fd == -1) || pri->fixed_config)  in tuntap_del_addr()
46 	close_addr(addr, netmask, pri->dev_name);  in tuntap_del_addr()
58 	dup2(data->stdout_fd, 1);  in tuntap_pre_exec()
59 	close(data->close_me);  in tuntap_pre_exec()
62 static int tuntap_open_tramp(char *gate, int *fd_out, int me, int remote,  in tuntap_open_tramp()  argument
73 	int pid, n, err;  in tuntap_open_tramp()  local
77 	data.stdout_fd = remote;  in tuntap_open_tramp()
80 	pid = run_helper(tuntap_pre_exec, &data, argv);  in tuntap_open_tramp()
82 	if (pid < 0)  in tuntap_open_tramp()
83 		return pid;  in tuntap_open_tramp()
85 	close(remote);  in tuntap_open_tramp()
104 		err = -errno;  in tuntap_open_tramp()
105 		printk(UM_KERN_ERR "tuntap_open_tramp : recvmsg failed - "  in tuntap_open_tramp()
109 	helper_wait(pid);  in tuntap_open_tramp()
115 		return -EINVAL;  in tuntap_open_tramp()
117 	if ((cmsg->cmsg_level != SOL_SOCKET) ||  in tuntap_open_tramp()
118 	   (cmsg->cmsg_type != SCM_RIGHTS)) {  in tuntap_open_tramp()
121 		return -EINVAL;  in tuntap_open_tramp()
135 	err = tap_open_common(pri->dev, pri->gate_addr);  in tuntap_open()
139 	if (pri->fixed_config) {  in tuntap_open()
140 		pri->fd = os_open_file("/dev/net/tun",  in tuntap_open()
142 		if (pri->fd < 0) {  in tuntap_open()
144 			       "err = %d\n", -pri->fd);  in tuntap_open()
145 			return pri->fd;  in tuntap_open()
149 		strlcpy(ifr.ifr_name, pri->dev_name, sizeof(ifr.ifr_name));  in tuntap_open()
150 		if (ioctl(pri->fd, TUNSETIFF, &ifr) < 0) {  in tuntap_open()
151 			err = -errno;  in tuntap_open()
154 			close(pri->fd);  in tuntap_open()
161 			err = -errno;  in tuntap_open()
162 			printk(UM_KERN_ERR "tuntap_open : socketpair failed - "  in tuntap_open()
169 			len--;  in tuntap_open()
172 		err = tuntap_open_tramp(pri->gate_addr, &pri->fd, fds[0],  in tuntap_open()
179 			printk(UM_KERN_ERR "tuntap_open_tramp failed - "  in tuntap_open()
180 			       "err = %d\n", -err);  in tuntap_open()
184 		pri->dev_name = uml_strdup(buffer);  in tuntap_open()
190 		iter_addresses(pri->dev, open_addr, pri->dev_name);  in tuntap_open()
193 	return pri->fd;  in tuntap_open()
200 	if (!pri->fixed_config)  in tuntap_close()
201 		iter_addresses(pri->dev, close_addr, pri->dev_name);  in tuntap_close()
203 	pri->fd = -1;  in tuntap_close()