Proxmox-Port/linux-loongson
1
0
Fork 0
mirror of https://git.kernel.org/pub/scm/linux/kernel/git/chenhuacai/linux-loongson synced 2025-08-29 11:42:36 +00:00
Code Issues Actions Packages Projects Releases Wiki Activity

um: Remove obsolete legacy network transports

Browse Source 
These legacy network transports were marked as obsolete in commit
40814b98a5 ("um: Mark non-vector net transports as obsolete").
More than five years have passed since then. Remove these network
transports to reduce the maintenance burden.

Suggested-by: Anton Ivanov <anton.ivanov@cambridgegreys.com>
Signed-off-by: Tiwei Bie <tiwei.btw@antgroup.com>
Acked-By: Anton Ivanov <anton.ivanov@cambridgegreys.com>
Link: https://patch.msgid.link/20250503051710.3286595-2-tiwei.btw@antgroup.com
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
This commit is contained in:
Tiwei Bie 2025-05-03 13:17:08 +08:00 committed by Johannes Berg
parent 304c9f7f8f
commit 65eaac591b
32 changed files with 4 additions and 2757 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

31
Documentation/virt/uml/user_mode_linux_howto_v2.rst
View File

@ -219,16 +219,6 @@ remote UML and other VM instances.
+-----------+--------+------------------------------------+------------+
| vde | vector | dep. on VDE VPN: Virt.Net Locator | varies |
+-----------+--------+------------------------------------+------------+
| tuntap | legacy | none | ~ 500Mbit |
+-----------+--------+------------------------------------+------------+
| daemon | legacy | none | ~ 450Mbit |
+-----------+--------+------------------------------------+------------+
| socket | legacy | none | ~ 450Mbit |
+-----------+--------+------------------------------------+------------+
| ethertap | legacy | obsolete | ~ 500Mbit |
+-----------+--------+------------------------------------+------------+
| vde | legacy | obsolete | ~ 500Mbit |
+-----------+--------+------------------------------------+------------+
* All transports which have tso and checksum offloads can deliver speeds
approaching 10G on TCP streams.
@ -236,27 +226,16 @@ remote UML and other VM instances.
* All transports which have multi-packet rx and/or tx can deliver pps
rates of up to 1Mps or more.
* All legacy transports are generally limited to ~600-700MBit and 0.05Mps.
* GRE and L2TPv3 allow connections to all of: local machine, remote
machines, remote network devices and remote UML instances.
* Socket allows connections only between UML instances.
* Daemon and bess require running a local switch. This switch may be
connected to the host as well.
Network configuration privileges
================================
The majority of the supported networking modes need ``root`` privileges.
For example, in the legacy tuntap networking mode, users were required
to be part of the group associated with the tunnel device.
For newer network drivers like the vector transports, ``root`` privilege
is required to fire an ioctl to setup the tun interface and/or use
raw sockets where needed.
For example, for vector transports, ``root`` privilege is required to fire
an ioctl to setup the tun interface and/or use raw sockets where needed.
This can be achieved by granting the user a particular capability instead
of running UML as root. In case of vector transport, a user can add the
@ -610,12 +589,6 @@ connect to a local area cloud (all the UML nodes using the same
multicast address running on hosts in the same multicast domain (LAN)
will be automagically connected together to a virtual LAN.
Configuring Legacy transports
=============================
Legacy transports are now considered obsolete. Please use the vector
versions.
***********
Running UML
***********

6
arch/um/configs/i386_defconfig
View File

@ -53,12 +53,6 @@ CONFIG_UNIX=y
CONFIG_INET=y
# CONFIG_IPV6 is not set
CONFIG_UML_NET=y
CONFIG_UML_NET_ETHERTAP=y
CONFIG_UML_NET_TUNTAP=y
CONFIG_UML_NET_SLIP=y
CONFIG_UML_NET_DAEMON=y
CONFIG_UML_NET_MCAST=y
CONFIG_UML_NET_SLIRP=y
CONFIG_EXT4_FS=y
CONFIG_QUOTA=y
CONFIG_AUTOFS_FS=m

6
arch/um/configs/x86_64_defconfig
View File

@ -52,12 +52,6 @@ CONFIG_UNIX=y
CONFIG_INET=y
# CONFIG_IPV6 is not set
CONFIG_UML_NET=y
CONFIG_UML_NET_ETHERTAP=y
CONFIG_UML_NET_TUNTAP=y
CONFIG_UML_NET_SLIP=y
CONFIG_UML_NET_DAEMON=y
CONFIG_UML_NET_MCAST=y
CONFIG_UML_NET_SLIRP=y
CONFIG_EXT4_FS=y
CONFIG_QUOTA=y
CONFIG_AUTOFS_FS=m

170
arch/um/drivers/Kconfig
View File

@ -143,99 +143,6 @@ config UML_NET
enable at least one of the following transport options to actually
make use of UML networking.
config UML_NET_ETHERTAP
bool "Ethertap transport (obsolete)"
depends on UML_NET
help
The Ethertap User-Mode Linux network transport allows a single
running UML to exchange packets with its host over one of the
host's Ethertap devices, such as /dev/tap0. Additional running
UMLs can use additional Ethertap devices, one per running UML.
While the UML believes it's on a (multi-device, broadcast) virtual
Ethernet network, it's in fact communicating over a point-to-point
link with the host.
To use this, your host kernel must have support for Ethertap
devices. Also, if your host kernel is 2.4.x, it must have
CONFIG_NETLINK_DEV configured as Y or M.
For more information, see
<http://user-mode-linux.sourceforge.net/old/networking.html> That site
has examples of the UML command line to use to enable Ethertap
networking.
NOTE: THIS TRANSPORT IS DEPRECATED AND WILL BE REMOVED SOON!!! Please
migrate to UML_NET_VECTOR.
If unsure, say N.
config UML_NET_TUNTAP
bool "TUN/TAP transport (obsolete)"
depends on UML_NET
help
The UML TUN/TAP network transport allows a UML instance to exchange
packets with the host over a TUN/TAP device. This option will only
work with a 2.4 host, unless you've applied the TUN/TAP patch to
your 2.2 host kernel.
To use this transport, your host kernel must have support for TUN/TAP
devices, either built-in or as a module.
NOTE: THIS TRANSPORT IS DEPRECATED AND WILL BE REMOVED SOON!!! Please
migrate to UML_NET_VECTOR.
If unsure, say N.
config UML_NET_SLIP
bool "SLIP transport (obsolete)"
depends on UML_NET
help
The slip User-Mode Linux network transport allows a running UML to
network with its host over a point-to-point link. Unlike Ethertap,
which can carry any Ethernet frame (and hence even non-IP packets),
the slip transport can only carry IP packets.
To use this, your host must support slip devices.
For more information, see
<http://user-mode-linux.sourceforge.net/old/networking.html>.
has examples of the UML command line to use to enable slip
networking, and details of a few quirks with it.
NOTE: THIS TRANSPORT IS DEPRECATED AND WILL BE REMOVED SOON!!! Please
migrate to UML_NET_VECTOR.
If unsure, say N.
config UML_NET_DAEMON
bool "Daemon transport (obsolete)"
depends on UML_NET
help
This User-Mode Linux network transport allows one or more running
UMLs on a single host to communicate with each other, but not to
the host.
To use this form of networking, you'll need to run the UML
networking daemon on the host.
For more information, see
<http://user-mode-linux.sourceforge.net/old/networking.html> That site
has examples of the UML command line to use to enable Daemon
networking.
NOTE: THIS TRANSPORT IS DEPRECATED AND WILL BE REMOVED SOON!!! Please
migrate to UML_NET_VECTOR.
If unsure, say N.
config UML_NET_DAEMON_DEFAULT_SOCK
string "Default socket for daemon transport"
default "/tmp/uml.ctl"
depends on UML_NET_DAEMON
help
This option allows setting the default socket for the daemon
transport, normally it defaults to /tmp/uml.ctl.
config UML_NET_VECTOR
bool "Vector I/O high performance network devices"
depends on UML_NET
@ -248,83 +155,6 @@ config UML_NET_VECTOR
with up to 4 times higher network throughput than the UML network
drivers.
config UML_NET_VDE
bool "VDE transport (obsolete)"
depends on UML_NET
depends on !MODVERSIONS
select MAY_HAVE_RUNTIME_DEPS
help
This User-Mode Linux network transport allows one or more running
UMLs on a single host to communicate with each other and also
with the rest of the world using Virtual Distributed Ethernet,
an improved fork of uml_switch.
You must have libvdeplug installed in order to build the vde
transport into UML.
To use this form of networking, you will need to run vde_switch
on the host.
For more information, see <http://wiki.virtualsquare.org/>
That site has a good overview of what VDE is and also examples
of the UML command line to use to enable VDE networking.
NOTE: THIS TRANSPORT IS DEPRECATED AND WILL BE REMOVED SOON!!! Please
migrate to UML_NET_VECTOR.
If unsure, say N.
config UML_NET_MCAST
bool "Multicast transport (obsolete)"
depends on UML_NET
help
This Multicast User-Mode Linux network transport allows multiple
UMLs (even ones running on different host machines!) to talk to
each other over a virtual ethernet network. However, it requires
at least one UML with one of the other transports to act as a
bridge if any of them need to be able to talk to their hosts or any
other IP machines.
To use this, your host kernel(s) must support IP Multicasting.
For more information, see
<http://user-mode-linux.sourceforge.net/old/networking.html> That site
has examples of the UML command line to use to enable Multicast
networking, and notes about the security of this approach.
NOTE: THIS TRANSPORT IS DEPRECATED AND WILL BE REMOVED SOON!!! Please
migrate to UML_NET_VECTOR.
If unsure, say N.
config UML_NET_SLIRP
bool "SLiRP transport (obsolete)"
depends on UML_NET
help
The SLiRP User-Mode Linux network transport allows a running UML
to network by invoking a program that can handle SLIP encapsulated
packets. This is commonly (but not limited to) the application
known as SLiRP, a program that can re-socket IP packets back onto
he host on which it is run. Only IP packets are supported,
unlike other network transports that can handle all Ethernet
frames. In general, slirp allows the UML the same IP connectivity
to the outside world that the host user is permitted, and unlike
other transports, SLiRP works without the need of root level
privileges, setuid binaries, or SLIP devices on the host. This
also means not every type of connection is possible, but most
situations can be accommodated with carefully crafted slirp
commands that can be passed along as part of the network device's
setup string. The effect of this transport on the UML is similar
that of a host behind a firewall that masquerades all network
connections passing through it (but is less secure).
NOTE: THIS TRANSPORT IS DEPRECATED AND WILL BE REMOVED SOON!!! Please
migrate to UML_NET_VECTOR.
If unsure, say N.
Startup example: "eth0=slirp,FE:FD:01:02:03:04,/usr/local/bin/slirp"
endmenu
config VIRTIO_UML

18
arch/um/drivers/Makefile
View File

@ -6,11 +6,7 @@
# pcap is broken in 2.5 because kbuild doesn't allow pcap.a to be linked
# in to pcap.o
slip-objs := slip_kern.o slip_user.o
slirp-objs := slirp_kern.o slirp_user.o
daemon-objs := daemon_kern.o daemon_user.o
vector-objs := vector_kern.o vector_user.o vector_transports.o
umcast-objs := umcast_kern.o umcast_user.o
net-objs := net_kern.o net_user.o
mconsole-objs := mconsole_kern.o mconsole_user.o
hostaudio-objs := hostaudio_kern.o
@ -21,13 +17,6 @@ harddog-builtin-$(CONFIG_UML_WATCHDOG) := harddog_user.o harddog_user_exp.o
rtc-objs := rtc_kern.o rtc_user.o
vfio_uml-objs := vfio_kern.o vfio_user.o
LDFLAGS_vde.o = $(shell $(CC) $(CFLAGS) -print-file-name=libvdeplug.a)
targets := vde_kern.o vde_user.o
$(obj)/vde.o: $(obj)/vde_kern.o $(obj)/vde_user.o
$(LD) -r -dp -o $@ $^ $(ld_flags)
#XXX: The call below does not work because the flags are added before the
# object name, so nothing from the library gets linked.
#$(call if_changed,ld)
@ -39,12 +28,7 @@ obj-y := stdio_console.o fd.o chan_kern.o chan_user.o line.o
obj-$(CONFIG_SSL) += ssl.o
obj-$(CONFIG_STDERR_CONSOLE) += stderr_console.o
obj-$(CONFIG_UML_NET_SLIP) += slip.o slip_common.o
obj-$(CONFIG_UML_NET_SLIRP) += slirp.o slip_common.o
obj-$(CONFIG_UML_NET_DAEMON) += daemon.o
obj-$(CONFIG_UML_NET_VECTOR) += vector.o
obj-$(CONFIG_UML_NET_VDE) += vde.o
obj-$(CONFIG_UML_NET_MCAST) += umcast.o
obj-$(CONFIG_UML_NET) += net.o
obj-$(CONFIG_MCONSOLE) += mconsole.o
obj-$(CONFIG_MMAPPER) += mmapper_kern.o
@ -66,7 +50,7 @@ obj-$(CONFIG_UML_PCI_OVER_VIRTIO) += virtio_pcidev.o
obj-$(CONFIG_UML_PCI_OVER_VFIO) += vfio_uml.o
# pcap_user.o must be added explicitly.
USER_OBJS := fd.o null.o pty.o tty.o xterm.o slip_common.o vde_user.o vector_user.o
USER_OBJS := fd.o null.o pty.o tty.o xterm.o vector_user.o
CFLAGS_null.o = -DDEV_NULL=$(DEV_NULL_PATH)
CFLAGS_xterm.o += '-DCONFIG_XTERM_CHAN_DEFAULT_EMULATOR="$(CONFIG_XTERM_CHAN_DEFAULT_EMULATOR)"'

29
arch/um/drivers/daemon.h
View File

@ -1,29 +0,0 @@
/* SPDX-License-Identifier: GPL-2.0 */
/*
* Copyright (C) 2001 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
*/
#ifndef __DAEMON_H__
#define __DAEMON_H__
#include <net_user.h>
#define SWITCH_VERSION 3
struct daemon_data {
char *sock_type;
char *ctl_sock;
void *ctl_addr;
void *data_addr;
void *local_addr;
int fd;
int control;
void *dev;
};
extern const struct net_user_info daemon_user_info;
extern int daemon_user_write(int fd, void *buf, int len,
struct daemon_data *pri);
#endif

95
arch/um/drivers/daemon_kern.c
View File

@ -1,95 +0,0 @@
// SPDX-License-Identifier: GPL-2.0
/*
* Copyright (C) 2001 Lennert Buytenhek (buytenh@gnu.org) and
* James Leu (jleu@mindspring.net).
* Copyright (C) 2001 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
* Copyright (C) 2001 by various other people who didn't put their name here.
*/
#include <linux/init.h>
#include <linux/netdevice.h>
#include <net_kern.h>
#include "daemon.h"
struct daemon_init {
char *sock_type;
char *ctl_sock;
};
static void daemon_init(struct net_device *dev, void *data)
{
struct uml_net_private *pri;
struct daemon_data *dpri;
struct daemon_init *init = data;
pri = netdev_priv(dev);
dpri = (struct daemon_data *) pri->user;
dpri->sock_type = init->sock_type;
dpri->ctl_sock = init->ctl_sock;
dpri->fd = -1;
dpri->control = -1;
dpri->dev = dev;
/* We will free this pointer. If it contains crap we're burned. */
dpri->ctl_addr = NULL;
dpri->data_addr = NULL;
dpri->local_addr = NULL;
printk("daemon backend (uml_switch version %d) - %s:%s",
SWITCH_VERSION, dpri->sock_type, dpri->ctl_sock);
printk("\n");
}
static int daemon_read(int fd, struct sk_buff *skb, struct uml_net_private *lp)
{
return net_recvfrom(fd, skb_mac_header(skb),
skb->dev->mtu + ETH_HEADER_OTHER);
}
static int daemon_write(int fd, struct sk_buff *skb, struct uml_net_private *lp)
{
return daemon_user_write(fd, skb->data, skb->len,
(struct daemon_data *) &lp->user);
}
static const struct net_kern_info daemon_kern_info = {
.init = daemon_init,
.protocol = eth_protocol,
.read = daemon_read,
.write = daemon_write,
};
static int daemon_setup(char *str, char **mac_out, void *data)
{
struct daemon_init *init = data;
char *remain;
*init = ((struct daemon_init)
{ .sock_type = "unix",
.ctl_sock = CONFIG_UML_NET_DAEMON_DEFAULT_SOCK });
remain = split_if_spec(str, mac_out, &init->sock_type, &init->ctl_sock,
NULL);
if (remain != NULL)
printk(KERN_WARNING "daemon_setup : Ignoring data socket "
"specification\n");
return 1;
}
static struct transport daemon_transport = {
.list = LIST_HEAD_INIT(daemon_transport.list),
.name = "daemon",
.setup = daemon_setup,
.user = &daemon_user_info,
.kern = &daemon_kern_info,
.private_size = sizeof(struct daemon_data),
.setup_size = sizeof(struct daemon_init),
};
static int register_daemon(void)
{
register_transport(&daemon_transport);
return 0;
}
late_initcall(register_daemon);

194
arch/um/drivers/daemon_user.c
View File

@ -1,194 +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 <stdint.h>
#include <string.h>
#include <unistd.h>
#include <errno.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <sys/time.h>
#include <sys/un.h>
#include "daemon.h"
#include <net_user.h>
#include <os.h>
#include <um_malloc.h>
enum request_type { REQ_NEW_CONTROL };
#define SWITCH_MAGIC 0xfeedface
struct request_v3 {
uint32_t magic;
uint32_t version;
enum request_type type;
struct sockaddr_un sock;
};
static struct sockaddr_un *new_addr(void *name, int len)
{
struct sockaddr_un *sun;
sun = uml_kmalloc(sizeof(struct sockaddr_un), UM_GFP_KERNEL);
if (sun == NULL) {
printk(UM_KERN_ERR "new_addr: allocation of sockaddr_un "
"failed\n");
return NULL;
}
sun->sun_family = AF_UNIX;
memcpy(sun->sun_path, name, len);
return sun;
}
static int connect_to_switch(struct daemon_data *pri)
{
struct sockaddr_un *ctl_addr = pri->ctl_addr;
struct sockaddr_un *local_addr = pri->local_addr;
struct sockaddr_un *sun;
struct request_v3 req;
int fd, n, err;
pri->control = socket(AF_UNIX, SOCK_STREAM, 0);
if (pri->control < 0) {
err = -errno;
printk(UM_KERN_ERR "daemon_open : control socket failed, "
"errno = %d\n", -err);
return err;
}
if (connect(pri->control, (struct sockaddr *) ctl_addr,
sizeof(*ctl_addr)) < 0) {
err = -errno;
printk(UM_KERN_ERR "daemon_open : control connect failed, "
"errno = %d\n", -err);
goto out;
}
fd = socket(AF_UNIX, SOCK_DGRAM, 0);
if (fd < 0) {
err = -errno;
printk(UM_KERN_ERR "daemon_open : data socket failed, "
"errno = %d\n", -err);
goto out;
}
if (bind(fd, (struct sockaddr *) local_addr, sizeof(*local_addr)) < 0) {
err = -errno;
printk(UM_KERN_ERR "daemon_open : data bind failed, "
"errno = %d\n", -err);
goto out_close;
}
sun = uml_kmalloc(sizeof(struct sockaddr_un), UM_GFP_KERNEL);
if (sun == NULL) {
printk(UM_KERN_ERR "new_addr: allocation of sockaddr_un "
"failed\n");
err = -ENOMEM;
goto out_close;
}
req.magic = SWITCH_MAGIC;
req.version = SWITCH_VERSION;
req.type = REQ_NEW_CONTROL;
req.sock = *local_addr;
n = write(pri->control, &req, sizeof(req));
if (n != sizeof(req)) {
printk(UM_KERN_ERR "daemon_open : control setup request "
"failed, err = %d\n", -errno);
err = -ENOTCONN;
goto out_free;
}
n = read(pri->control, sun, sizeof(*sun));
if (n != sizeof(*sun)) {
printk(UM_KERN_ERR "daemon_open : read of data socket failed, "
"err = %d\n", -errno);
err = -ENOTCONN;
goto out_free;
}
pri->data_addr = sun;
return fd;
out_free:
kfree(sun);
out_close:
close(fd);
out:
close(pri->control);
return err;
}
static int daemon_user_init(void *data, void *dev)
{
struct daemon_data *pri = data;
struct timeval tv;
struct {
char zero;
int pid;
int usecs;
} name;
if (!strcmp(pri->sock_type, "unix"))
pri->ctl_addr = new_addr(pri->ctl_sock,
strlen(pri->ctl_sock) + 1);
name.zero = 0;
name.pid = os_getpid();
gettimeofday(&tv, NULL);
name.usecs = tv.tv_usec;
pri->local_addr = new_addr(&name, sizeof(name));
pri->dev = dev;
pri->fd = connect_to_switch(pri);
if (pri->fd < 0) {
kfree(pri->local_addr);
pri->local_addr = NULL;
return pri->fd;
}
return 0;
}
static int daemon_open(void *data)
{
struct daemon_data *pri = data;
return pri->fd;
}
static void daemon_remove(void *data)
{
struct daemon_data *pri = data;
close(pri->fd);
pri->fd = -1;
close(pri->control);
pri->control = -1;
kfree(pri->data_addr);
pri->data_addr = NULL;
kfree(pri->ctl_addr);
pri->ctl_addr = NULL;
kfree(pri->local_addr);
pri->local_addr = NULL;
}
int daemon_user_write(int fd, void *buf, int len, struct daemon_data *pri)
{
struct sockaddr_un *data_addr = pri->data_addr;
return net_sendto(fd, buf, len, data_addr, sizeof(*data_addr));
}
const struct net_user_info daemon_user_info = {
.init = daemon_user_init,
.open = daemon_open,
.close = NULL,
.remove = daemon_remove,
.add_address = NULL,
.delete_address = NULL,
.mtu = ETH_MAX_PACKET,
.max_packet = ETH_MAX_PACKET + ETH_HEADER_OTHER,
};

21
arch/um/drivers/slip.h
View File

@ -1,21 +0,0 @@
/* SPDX-License-Identifier: GPL-2.0 */
#ifndef __UM_SLIP_H
#define __UM_SLIP_H
#include "slip_common.h"
struct slip_data {
void *dev;
char name[sizeof("slnnnnn\0")];
char *addr;
char *gate_addr;
int slave;
struct slip_proto slip;
};
extern const struct net_user_info slip_user_info;
extern int slip_user_read(int fd, void *buf, int len, struct slip_data *pri);
extern int slip_user_write(int fd, void *buf, int len, struct slip_data *pri);
#endif

55
arch/um/drivers/slip_common.c
View File

@ -1,55 +0,0 @@
// SPDX-License-Identifier: GPL-2.0
#include <string.h>
#include "slip_common.h"
#include <net_user.h>
int slip_proto_read(int fd, void *buf, int len, struct slip_proto *slip)
{
int i, n, size, start;
if(slip->more > 0){
i = 0;
while(i < slip->more){
size = slip_unesc(slip->ibuf[i++], slip->ibuf,
&slip->pos, &slip->esc);
if(size){
memcpy(buf, slip->ibuf, size);
memmove(slip->ibuf, &slip->ibuf[i],
slip->more - i);
slip->more = slip->more - i;
return size;
}
}
slip->more = 0;
}
n = net_read(fd, &slip->ibuf[slip->pos],
sizeof(slip->ibuf) - slip->pos);
if(n <= 0)
return n;
start = slip->pos;
for(i = 0; i < n; i++){
size = slip_unesc(slip->ibuf[start + i], slip->ibuf,&slip->pos,
&slip->esc);
if(size){
memcpy(buf, slip->ibuf, size);
memmove(slip->ibuf, &slip->ibuf[start+i+1],
n - (i + 1));
slip->more = n - (i + 1);
return size;
}
}
return 0;
}
int slip_proto_write(int fd, void *buf, int len, struct slip_proto *slip)
{
int actual, n;
actual = slip_esc(buf, slip->obuf, len);
n = net_write(fd, slip->obuf, actual);
if(n < 0)
return n;
else return len;
}

106
arch/um/drivers/slip_common.h
View File

@ -1,106 +0,0 @@
/* SPDX-License-Identifier: GPL-2.0 */
#ifndef __UM_SLIP_COMMON_H
#define __UM_SLIP_COMMON_H
#define BUF_SIZE 1500
/* two bytes each for a (pathological) max packet of escaped chars + *
* terminating END char + initial END char */
#define ENC_BUF_SIZE (2 * BUF_SIZE + 2)
/* SLIP protocol characters. */
#define SLIP_END 0300 /* indicates end of frame */
#define SLIP_ESC 0333 /* indicates byte stuffing */
#define SLIP_ESC_END 0334 /* ESC ESC_END means END 'data' */
#define SLIP_ESC_ESC 0335 /* ESC ESC_ESC means ESC 'data' */
static inline int slip_unesc(unsigned char c, unsigned char *buf, int *pos,
int *esc)
{
int ret;
switch(c){
case SLIP_END:
*esc = 0;
ret=*pos;
*pos=0;
return(ret);
case SLIP_ESC:
*esc = 1;
return(0);
case SLIP_ESC_ESC:
if(*esc){
*esc = 0;
c = SLIP_ESC;
}
break;
case SLIP_ESC_END:
if(*esc){
*esc = 0;
c = SLIP_END;
}
break;
}
buf[(*pos)++] = c;
return(0);
}
static inline int slip_esc(unsigned char *s, unsigned char *d, int len)
{
unsigned char *ptr = d;
unsigned char c;
/*
* Send an initial END character to flush out any
* data that may have accumulated in the receiver
* due to line noise.
*/
*ptr++ = SLIP_END;
/*
* For each byte in the packet, send the appropriate
* character sequence, according to the SLIP protocol.
*/
while (len-- > 0) {
switch(c = *s++) {
case SLIP_END:
*ptr++ = SLIP_ESC;
*ptr++ = SLIP_ESC_END;
break;
case SLIP_ESC:
*ptr++ = SLIP_ESC;
*ptr++ = SLIP_ESC_ESC;
break;
default:
*ptr++ = c;
break;
}
}
*ptr++ = SLIP_END;
return (ptr - d);
}
struct slip_proto {
unsigned char ibuf[ENC_BUF_SIZE];
unsigned char obuf[ENC_BUF_SIZE];
int more; /* more data: do not read fd until ibuf has been drained */
int pos;
int esc;
};
static inline void slip_proto_init(struct slip_proto * slip)
{
memset(slip->ibuf, 0, sizeof(slip->ibuf));
memset(slip->obuf, 0, sizeof(slip->obuf));
slip->more = 0;
slip->pos = 0;
slip->esc = 0;
}
extern int slip_proto_read(int fd, void *buf, int len,
struct slip_proto *slip);
extern int slip_proto_write(int fd, void *buf, int len,
struct slip_proto *slip);
#endif

93
arch/um/drivers/slip_kern.c
View File

@ -1,93 +0,0 @@
// SPDX-License-Identifier: GPL-2.0
/*
* Copyright (C) 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
*/
#include <linux/if_arp.h>
#include <linux/init.h>
#include <linux/netdevice.h>
#include <net_kern.h>
#include "slip.h"
struct slip_init {
char *gate_addr;
};
static void slip_init(struct net_device *dev, void *data)
{
struct uml_net_private *private;
struct slip_data *spri;
struct slip_init *init = data;
private = netdev_priv(dev);
spri = (struct slip_data *) private->user;
memset(spri->name, 0, sizeof(spri->name));
spri->addr = NULL;
spri->gate_addr = init->gate_addr;
spri->slave = -1;
spri->dev = dev;
slip_proto_init(&spri->slip);
dev->hard_header_len = 0;
dev->header_ops = NULL;
dev->addr_len = 0;
dev->type = ARPHRD_SLIP;
dev->tx_queue_len = 256;
dev->flags = IFF_NOARP;
printk("SLIP backend - SLIP IP = %s\n", spri->gate_addr);
}
static unsigned short slip_protocol(struct sk_buff *skbuff)
{
return htons(ETH_P_IP);
}
static int slip_read(int fd, struct sk_buff *skb, struct uml_net_private *lp)
{
return slip_user_read(fd, skb_mac_header(skb), skb->dev->mtu,
(struct slip_data *) &lp->user);
}
static int slip_write(int fd, struct sk_buff *skb, struct uml_net_private *lp)
{
return slip_user_write(fd, skb->data, skb->len,
(struct slip_data *) &lp->user);
}
static const struct net_kern_info slip_kern_info = {
.init = slip_init,
.protocol = slip_protocol,
.read = slip_read,
.write = slip_write,
};
static int slip_setup(char *str, char **mac_out, void *data)
{
struct slip_init *init = data;
*init = ((struct slip_init) { .gate_addr = NULL });
if (str[0] != '\0')
init->gate_addr = str;
return 1;
}
static struct transport slip_transport = {
.list = LIST_HEAD_INIT(slip_transport.list),
.name = "slip",
.setup = slip_setup,
.user = &slip_user_info,
.kern = &slip_kern_info,
.private_size = sizeof(struct slip_data),
.setup_size = sizeof(struct slip_init),
};
static int register_slip(void)
{
register_transport(&slip_transport);
return 0;
}
late_initcall(register_slip);

252
arch/um/drivers/slip_user.c
View File

@ -1,252 +0,0 @@
// SPDX-License-Identifier: GPL-2.0
/*
* Copyright (C) 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
*/
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <errno.h>
#include <fcntl.h>
#include <string.h>
#include <termios.h>
#include <sys/wait.h>
#include <net_user.h>
#include <os.h>
#include "slip.h"
#include <um_malloc.h>
static int slip_user_init(void *data, void *dev)
{
struct slip_data *pri = data;
pri->dev = dev;
return 0;
}
static int set_up_tty(int fd)
{
int i;
struct termios tios;
if (tcgetattr(fd, &tios) < 0) {
printk(UM_KERN_ERR "could not get initial terminal "
"attributes\n");
return -1;
}
tios.c_cflag = CS8 | CREAD | HUPCL | CLOCAL;
tios.c_iflag = IGNBRK | IGNPAR;
tios.c_oflag = 0;
tios.c_lflag = 0;
for (i = 0; i < NCCS; i++)
tios.c_cc[i] = 0;
tios.c_cc[VMIN] = 1;
tios.c_cc[VTIME] = 0;
cfsetospeed(&tios, B38400);
cfsetispeed(&tios, B38400);
if (tcsetattr(fd, TCSAFLUSH, &tios) < 0) {
printk(UM_KERN_ERR "failed to set terminal attributes\n");
return -1;
}
return 0;
}
struct slip_pre_exec_data {
int stdin_fd;
int stdout_fd;
int close_me;
};
static void slip_pre_exec(void *arg)
{
struct slip_pre_exec_data *data = arg;
if (data->stdin_fd >= 0)
dup2(data->stdin_fd, 0);
dup2(data->stdout_fd, 1);
if (data->close_me >= 0)
close(data->close_me);
}
static int slip_tramp(char **argv, int fd)
{
struct slip_pre_exec_data pe_data;
char *output;
int pid, fds[2], err, output_len;
err = os_pipe(fds, 1, 0);
if (err < 0) {
printk(UM_KERN_ERR "slip_tramp : pipe failed, err = %d\n",
-err);
goto out;
}
err = 0;
pe_data.stdin_fd = fd;
pe_data.stdout_fd = fds[1];
pe_data.close_me = fds[0];
err = run_helper(slip_pre_exec, &pe_data, argv);
if (err < 0)
goto out_close;
pid = err;
output_len = UM_KERN_PAGE_SIZE;
output = uml_kmalloc(output_len, UM_GFP_KERNEL);
if (output == NULL) {
printk(UM_KERN_ERR "slip_tramp : failed to allocate output "
"buffer\n");
os_kill_process(pid, 1);
err = -ENOMEM;
goto out_close;
}
close(fds[1]);
read_output(fds[0], output, output_len);
printk("%s", output);
err = helper_wait(pid);
close(fds[0]);
kfree(output);
return err;
out_close:
close(fds[0]);
close(fds[1]);
out:
return err;
}
static int slip_open(void *data)
{
struct slip_data *pri = data;
char version_buf[sizeof("nnnnn\0")];
char gate_buf[sizeof("nnn.nnn.nnn.nnn\0")];
char *argv[] = { "uml_net", version_buf, "slip", "up", gate_buf,
NULL };
int sfd, mfd, err;
err = get_pty();
if (err < 0) {
printk(UM_KERN_ERR "slip-open : Failed to open pty, err = %d\n",
-err);
goto out;
}
mfd = err;
err = open(ptsname(mfd), O_RDWR, 0);
if (err < 0) {
printk(UM_KERN_ERR "Couldn't open tty for slip line, "
"err = %d\n", -err);
goto out_close;
}
sfd = err;
err = set_up_tty(sfd);
if (err)
goto out_close2;
pri->slave = sfd;
pri->slip.pos = 0;
pri->slip.esc = 0;
if (pri->gate_addr != NULL) {
sprintf(version_buf, "%d", UML_NET_VERSION);
strcpy(gate_buf, pri->gate_addr);
err = slip_tramp(argv, sfd);
if (err < 0) {
printk(UM_KERN_ERR "slip_tramp failed - err = %d\n",
-err);
goto out_close2;
}
err = os_get_ifname(pri->slave, pri->name);
if (err < 0) {
printk(UM_KERN_ERR "get_ifname failed, err = %d\n",
-err);
goto out_close2;
}
iter_addresses(pri->dev, open_addr, pri->name);
}
else {
err = os_set_slip(sfd);
if (err < 0) {
printk(UM_KERN_ERR "Failed to set slip discipline "
"encapsulation - err = %d\n", -err);
goto out_close2;
}
}
return mfd;
out_close2:
close(sfd);
out_close:
close(mfd);
out:
return err;
}
static void slip_close(int fd, void *data)
{
struct slip_data *pri = data;
char version_buf[sizeof("nnnnn\0")];
char *argv[] = { "uml_net", version_buf, "slip", "down", pri->name,
NULL };
int err;
if (pri->gate_addr != NULL)
iter_addresses(pri->dev, close_addr, pri->name);
sprintf(version_buf, "%d", UML_NET_VERSION);
err = slip_tramp(argv, pri->slave);
if (err != 0)
printk(UM_KERN_ERR "slip_tramp failed - errno = %d\n", -err);
close(fd);
close(pri->slave);
pri->slave = -1;
}
int slip_user_read(int fd, void *buf, int len, struct slip_data *pri)
{
return slip_proto_read(fd, buf, len, &pri->slip);
}
int slip_user_write(int fd, void *buf, int len, struct slip_data *pri)
{
return slip_proto_write(fd, buf, len, &pri->slip);
}
static void slip_add_addr(unsigned char *addr, unsigned char *netmask,
void *data)
{
struct slip_data *pri = data;
if (pri->slave < 0)
return;
open_addr(addr, netmask, pri->name);
}
static void slip_del_addr(unsigned char *addr, unsigned char *netmask,
void *data)
{
struct slip_data *pri = data;
if (pri->slave < 0)
return;
close_addr(addr, netmask, pri->name);
}
const struct net_user_info slip_user_info = {
.init = slip_user_init,
.open = slip_open,
.close = slip_close,
.remove = NULL,
.add_address = slip_add_addr,
.delete_address = slip_del_addr,
.mtu = BUF_SIZE,
.max_packet = BUF_SIZE,
};

34
arch/um/drivers/slirp.h
View File

@ -1,34 +0,0 @@
/* SPDX-License-Identifier: GPL-2.0 */
#ifndef __UM_SLIRP_H
#define __UM_SLIRP_H
#include "slip_common.h"
#define SLIRP_MAX_ARGS 100
/*
* XXX this next definition is here because I don't understand why this
* initializer doesn't work in slirp_kern.c:
*
* argv : { init->argv[ 0 ... SLIRP_MAX_ARGS-1 ] },
*
* or why I can't typecast like this:
*
* argv : (char* [SLIRP_MAX_ARGS])(init->argv),
*/
struct arg_list_dummy_wrapper { char *argv[SLIRP_MAX_ARGS]; };
struct slirp_data {
void *dev;
struct arg_list_dummy_wrapper argw;
int pid;
int slave;
struct slip_proto slip;
};
extern const struct net_user_info slirp_user_info;
extern int slirp_user_read(int fd, void *buf, int len, struct slirp_data *pri);
extern int slirp_user_write(int fd, void *buf, int len,
struct slirp_data *pri);
#endif

120
arch/um/drivers/slirp_kern.c
View File

@ -1,120 +0,0 @@
// SPDX-License-Identifier: GPL-2.0
/*
* Copyright (C) 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
*/
#include <linux/if_arp.h>
#include <linux/init.h>
#include <linux/netdevice.h>
#include <linux/string.h>
#include <net_kern.h>
#include <net_user.h>
#include "slirp.h"
struct slirp_init {
struct arg_list_dummy_wrapper argw; /* XXX should be simpler... */
};
static void slirp_init(struct net_device *dev, void *data)
{
struct uml_net_private *private;
struct slirp_data *spri;
struct slirp_init *init = data;
int i;
private = netdev_priv(dev);
spri = (struct slirp_data *) private->user;
spri->argw = init->argw;
spri->pid = -1;
spri->slave = -1;
spri->dev = dev;
slip_proto_init(&spri->slip);
dev->hard_header_len = 0;
dev->header_ops = NULL;
dev->addr_len = 0;
dev->type = ARPHRD_SLIP;
dev->tx_queue_len = 256;
dev->flags = IFF_NOARP;
printk("SLIRP backend - command line:");
for (i = 0; spri->argw.argv[i] != NULL; i++)
printk(" '%s'",spri->argw.argv[i]);
printk("\n");
}
static unsigned short slirp_protocol(struct sk_buff *skbuff)
{
return htons(ETH_P_IP);
}
static int slirp_read(int fd, struct sk_buff *skb, struct uml_net_private *lp)
{
return slirp_user_read(fd, skb_mac_header(skb), skb->dev->mtu,
(struct slirp_data *) &lp->user);
}
static int slirp_write(int fd, struct sk_buff *skb, struct uml_net_private *lp)
{
return slirp_user_write(fd, skb->data, skb->len,
(struct slirp_data *) &lp->user);
}
const struct net_kern_info slirp_kern_info = {
.init = slirp_init,
.protocol = slirp_protocol,
.read = slirp_read,
.write = slirp_write,
};
static int slirp_setup(char *str, char **mac_out, void *data)
{
struct slirp_init *init = data;
int i=0;
*init = ((struct slirp_init) { .argw = { { "slirp", NULL } } });
str = split_if_spec(str, mac_out, NULL);
if (str == NULL) /* no command line given after MAC addr */
return 1;
do {
if (i >= SLIRP_MAX_ARGS - 1) {
printk(KERN_WARNING "slirp_setup: truncating slirp "
"arguments\n");
break;
}
init->argw.argv[i++] = str;
while(*str && *str!=',') {
if (*str == '_')
*str=' ';
str++;
}
if (*str != ',')
break;
*str++ = '\0';
} while (1);
init->argw.argv[i] = NULL;
return 1;
}
static struct transport slirp_transport = {
.list = LIST_HEAD_INIT(slirp_transport.list),
.name = "slirp",
.setup = slirp_setup,
.user = &slirp_user_info,
.kern = &slirp_kern_info,
.private_size = sizeof(struct slirp_data),
.setup_size = sizeof(struct slirp_init),
};
static int register_slirp(void)
{
register_transport(&slirp_transport);
return 0;
}
late_initcall(register_slirp);

124
arch/um/drivers/slirp_user.c
View File

@ -1,124 +0,0 @@
// SPDX-License-Identifier: GPL-2.0
/*
* Copyright (C) 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
*/
#include <unistd.h>
#include <errno.h>
#include <string.h>
#include <sys/wait.h>
#include <net_user.h>
#include <os.h>
#include "slirp.h"
static int slirp_user_init(void *data, void *dev)
{
struct slirp_data *pri = data;
pri->dev = dev;
return 0;
}
struct slirp_pre_exec_data {
int stdin_fd;
int stdout_fd;
};
static void slirp_pre_exec(void *arg)
{
struct slirp_pre_exec_data *data = arg;
if (data->stdin_fd != -1)
dup2(data->stdin_fd, 0);
if (data->stdout_fd != -1)
dup2(data->stdout_fd, 1);
}
static int slirp_tramp(char **argv, int fd)
{
struct slirp_pre_exec_data pe_data;
int pid;
pe_data.stdin_fd = fd;
pe_data.stdout_fd = fd;
pid = run_helper(slirp_pre_exec, &pe_data, argv);
return pid;
}
static int slirp_open(void *data)
{
struct slirp_data *pri = data;
int fds[2], err;
err = os_pipe(fds, 1, 1);
if (err)
return err;
err = slirp_tramp(pri->argw.argv, fds[1]);
if (err < 0) {
printk(UM_KERN_ERR "slirp_tramp failed - errno = %d\n", -err);
goto out;
}
pri->slave = fds[1];
pri->slip.pos = 0;
pri->slip.esc = 0;
pri->pid = err;
return fds[0];
out:
close(fds[0]);
close(fds[1]);
return err;
}
static void slirp_close(int fd, void *data)
{
struct slirp_data *pri = data;
int err;
close(fd);
close(pri->slave);
pri->slave = -1;
if (pri->pid<1) {
printk(UM_KERN_ERR "slirp_close: no child process to shut "
"down\n");
return;
}
#if 0
if (kill(pri->pid, SIGHUP)<0) {
printk(UM_KERN_ERR "slirp_close: sending hangup to %d failed "
"(%d)\n", pri->pid, errno);
}
#endif
err = helper_wait(pri->pid);
if (err < 0)
return;
pri->pid = -1;
}
int slirp_user_read(int fd, void *buf, int len, struct slirp_data *pri)
{
return slip_proto_read(fd, buf, len, &pri->slip);
}
int slirp_user_write(int fd, void *buf, int len, struct slirp_data *pri)
{
return slip_proto_write(fd, buf, len, &pri->slip);
}
const struct net_user_info slirp_user_info = {
.init = slirp_user_init,
.open = slirp_open,
.close = slirp_close,
.remove = NULL,
.add_address = NULL,
.delete_address = NULL,
.mtu = BUF_SIZE,
.max_packet = BUF_SIZE,
};

27
arch/um/drivers/umcast.h
View File

@ -1,27 +0,0 @@
/* SPDX-License-Identifier: GPL-2.0 */
/*
* Copyright (C) 2001 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
*/
#ifndef __DRIVERS_UMCAST_H
#define __DRIVERS_UMCAST_H
#include <net_user.h>
struct umcast_data {
char *addr;
unsigned short lport;
unsigned short rport;
void *listen_addr;
void *remote_addr;
int ttl;
int unicast;
void *dev;
};
extern const struct net_user_info umcast_user_info;
extern int umcast_user_write(int fd, void *buf, int len,
struct umcast_data *pri);
#endif

188
arch/um/drivers/umcast_kern.c
View File

@ -1,188 +0,0 @@
// SPDX-License-Identifier: GPL-2.0
/*
* user-mode-linux networking multicast transport
* Copyright (C) 2001 by Harald Welte <laforge@gnumonks.org>
* Copyright (C) 2001 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
*
* based on the existing uml-networking code, which is
* 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 <linux/init.h>
#include <linux/netdevice.h>
#include "umcast.h"
#include <net_kern.h>
struct umcast_init {
char *addr;
int lport;
int rport;
int ttl;
bool unicast;
};
static void umcast_init(struct net_device *dev, void *data)
{
struct uml_net_private *pri;
struct umcast_data *dpri;
struct umcast_init *init = data;
pri = netdev_priv(dev);
dpri = (struct umcast_data *) pri->user;
dpri->addr = init->addr;
dpri->lport = init->lport;
dpri->rport = init->rport;
dpri->unicast = init->unicast;
dpri->ttl = init->ttl;
dpri->dev = dev;
if (dpri->unicast) {
printk(KERN_INFO "ucast backend address: %s:%u listen port: "
"%u\n", dpri->addr, dpri->rport, dpri->lport);
} else {
printk(KERN_INFO "mcast backend multicast address: %s:%u, "
"TTL:%u\n", dpri->addr, dpri->lport, dpri->ttl);
}
}
static int umcast_read(int fd, struct sk_buff *skb, struct uml_net_private *lp)
{
return net_recvfrom(fd, skb_mac_header(skb),
skb->dev->mtu + ETH_HEADER_OTHER);
}
static int umcast_write(int fd, struct sk_buff *skb, struct uml_net_private *lp)
{
return umcast_user_write(fd, skb->data, skb->len,
(struct umcast_data *) &lp->user);
}
static const struct net_kern_info umcast_kern_info = {
.init = umcast_init,
.protocol = eth_protocol,
.read = umcast_read,
.write = umcast_write,
};
static int mcast_setup(char *str, char **mac_out, void *data)
{
struct umcast_init *init = data;
char *port_str = NULL, *ttl_str = NULL, *remain;
char *last;
*init = ((struct umcast_init)
{ .addr = "239.192.168.1",
.lport = 1102,
.ttl = 1 });
remain = split_if_spec(str, mac_out, &init->addr, &port_str, &ttl_str,
NULL);
if (remain != NULL) {
printk(KERN_ERR "mcast_setup - Extra garbage on "
"specification : '%s'\n", remain);
return 0;
}
if (port_str != NULL) {
init->lport = simple_strtoul(port_str, &last, 10);
if ((*last != '\0') || (last == port_str)) {
printk(KERN_ERR "mcast_setup - Bad port : '%s'\n",
port_str);
return 0;
}
}
if (ttl_str != NULL) {
init->ttl = simple_strtoul(ttl_str, &last, 10);
if ((*last != '\0') || (last == ttl_str)) {
printk(KERN_ERR "mcast_setup - Bad ttl : '%s'\n",
ttl_str);
return 0;
}
}
init->unicast = false;
init->rport = init->lport;
printk(KERN_INFO "Configured mcast device: %s:%u-%u\n", init->addr,
init->lport, init->ttl);
return 1;
}
static int ucast_setup(char *str, char **mac_out, void *data)
{
struct umcast_init *init = data;
char *lport_str = NULL, *rport_str = NULL, *remain;
char *last;
*init = ((struct umcast_init)
{ .addr = "",
.lport = 1102,
.rport = 1102 });
remain = split_if_spec(str, mac_out, &init->addr,
&lport_str, &rport_str, NULL);
if (remain != NULL) {
printk(KERN_ERR "ucast_setup - Extra garbage on "
"specification : '%s'\n", remain);
return 0;
}
if (lport_str != NULL) {
init->lport = simple_strtoul(lport_str, &last, 10);
if ((*last != '\0') || (last == lport_str)) {
printk(KERN_ERR "ucast_setup - Bad listen port : "
"'%s'\n", lport_str);
return 0;
}
}
if (rport_str != NULL) {
init->rport = simple_strtoul(rport_str, &last, 10);
if ((*last != '\0') || (last == rport_str)) {
printk(KERN_ERR "ucast_setup - Bad remote port : "
"'%s'\n", rport_str);
return 0;
}
}
init->unicast = true;
printk(KERN_INFO "Configured ucast device: :%u -> %s:%u\n",
init->lport, init->addr, init->rport);
return 1;
}
static struct transport mcast_transport = {
.list = LIST_HEAD_INIT(mcast_transport.list),
.name = "mcast",
.setup = mcast_setup,
.user = &umcast_user_info,
.kern = &umcast_kern_info,
.private_size = sizeof(struct umcast_data),
.setup_size = sizeof(struct umcast_init),
};
static struct transport ucast_transport = {
.list = LIST_HEAD_INIT(ucast_transport.list),
.name = "ucast",
.setup = ucast_setup,
.user = &umcast_user_info,
.kern = &umcast_kern_info,
.private_size = sizeof(struct umcast_data),
.setup_size = sizeof(struct umcast_init),
};
static int register_umcast(void)
{
register_transport(&mcast_transport);
register_transport(&ucast_transport);
return 0;
}
late_initcall(register_umcast);

184
arch/um/drivers/umcast_user.c
View File

@ -1,184 +0,0 @@
// SPDX-License-Identifier: GPL-2.0
/*
* user-mode-linux networking multicast transport
* Copyright (C) 2001 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
* Copyright (C) 2001 by Harald Welte <laforge@gnumonks.org>
*
* based on the existing uml-networking code, which is
* 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 <unistd.h>
#include <errno.h>
#include <netinet/in.h>
#include "umcast.h"
#include <net_user.h>
#include <um_malloc.h>
static struct sockaddr_in *new_addr(char *addr, unsigned short port)
{
struct sockaddr_in *sin;
sin = uml_kmalloc(sizeof(struct sockaddr_in), UM_GFP_KERNEL);
if (sin == NULL) {
printk(UM_KERN_ERR "new_addr: allocation of sockaddr_in "
"failed\n");
return NULL;
}
sin->sin_family = AF_INET;
if (addr)
sin->sin_addr.s_addr = in_aton(addr);
else
sin->sin_addr.s_addr = INADDR_ANY;
sin->sin_port = htons(port);
return sin;
}
static int umcast_user_init(void *data, void *dev)
{
struct umcast_data *pri = data;
pri->remote_addr = new_addr(pri->addr, pri->rport);
if (pri->unicast)
pri->listen_addr = new_addr(NULL, pri->lport);
else
pri->listen_addr = pri->remote_addr;
pri->dev = dev;
return 0;
}
static void umcast_remove(void *data)
{
struct umcast_data *pri = data;
kfree(pri->listen_addr);
if (pri->unicast)
kfree(pri->remote_addr);
pri->listen_addr = pri->remote_addr = NULL;
}
static int umcast_open(void *data)
{
struct umcast_data *pri = data;
struct sockaddr_in *lsin = pri->listen_addr;
struct sockaddr_in *rsin = pri->remote_addr;
struct ip_mreq mreq;
int fd, yes = 1, err = -EINVAL;
if ((!pri->unicast && lsin->sin_addr.s_addr == 0) ||
(rsin->sin_addr.s_addr == 0) ||
(lsin->sin_port == 0) || (rsin->sin_port == 0))
goto out;
fd = socket(AF_INET, SOCK_DGRAM, 0);
if (fd < 0) {
err = -errno;
printk(UM_KERN_ERR "umcast_open : data socket failed, "
"errno = %d\n", errno);
goto out;
}
if (setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, &yes, sizeof(yes)) < 0) {
err = -errno;
printk(UM_KERN_ERR "umcast_open: SO_REUSEADDR failed, "
"errno = %d\n", errno);
goto out_close;
}
if (!pri->unicast) {
/* set ttl according to config */
if (setsockopt(fd, SOL_IP, IP_MULTICAST_TTL, &pri->ttl,
sizeof(pri->ttl)) < 0) {
err = -errno;
printk(UM_KERN_ERR "umcast_open: IP_MULTICAST_TTL "
"failed, error = %d\n", errno);
goto out_close;
}
/* set LOOP, so data does get fed back to local sockets */
if (setsockopt(fd, SOL_IP, IP_MULTICAST_LOOP,
&yes, sizeof(yes)) < 0) {
err = -errno;
printk(UM_KERN_ERR "umcast_open: IP_MULTICAST_LOOP "
"failed, error = %d\n", errno);
goto out_close;
}
}
/* bind socket to the address */
if (bind(fd, (struct sockaddr *) lsin, sizeof(*lsin)) < 0) {
err = -errno;
printk(UM_KERN_ERR "umcast_open : data bind failed, "
"errno = %d\n", errno);
goto out_close;
}
if (!pri->unicast) {
/* subscribe to the multicast group */
mreq.imr_multiaddr.s_addr = lsin->sin_addr.s_addr;
mreq.imr_interface.s_addr = 0;
if (setsockopt(fd, SOL_IP, IP_ADD_MEMBERSHIP,
&mreq, sizeof(mreq)) < 0) {
err = -errno;
printk(UM_KERN_ERR "umcast_open: IP_ADD_MEMBERSHIP "
"failed, error = %d\n", errno);
printk(UM_KERN_ERR "There appears not to be a "
"multicast-capable network interface on the "
"host.\n");
printk(UM_KERN_ERR "eth0 should be configured in order "
"to use the multicast transport.\n");
goto out_close;
}
}
return fd;
out_close:
close(fd);
out:
return err;
}
static void umcast_close(int fd, void *data)
{
struct umcast_data *pri = data;
if (!pri->unicast) {
struct ip_mreq mreq;
struct sockaddr_in *lsin = pri->listen_addr;
mreq.imr_multiaddr.s_addr = lsin->sin_addr.s_addr;
mreq.imr_interface.s_addr = 0;
if (setsockopt(fd, SOL_IP, IP_DROP_MEMBERSHIP,
&mreq, sizeof(mreq)) < 0) {
printk(UM_KERN_ERR "umcast_close: IP_DROP_MEMBERSHIP "
"failed, error = %d\n", errno);
}
}
close(fd);
}
int umcast_user_write(int fd, void *buf, int len, struct umcast_data *pri)
{
struct sockaddr_in *data_addr = pri->remote_addr;
return net_sendto(fd, buf, len, data_addr, sizeof(*data_addr));
}
const struct net_user_info umcast_user_info = {
.init = umcast_user_init,
.open = umcast_open,
.close = umcast_close,
.remove = umcast_remove,
.add_address = NULL,
.delete_address = NULL,
.mtu = ETH_MAX_PACKET,
.max_packet = ETH_MAX_PACKET + ETH_HEADER_OTHER,
};

32
arch/um/drivers/vde.h
View File

@ -1,32 +0,0 @@
/* SPDX-License-Identifier: GPL-2.0 */
/*
* Copyright (C) 2007 Luca Bigliardi (shammash@artha.org).
*/
#ifndef __UM_VDE_H__
#define __UM_VDE_H__
struct vde_data {
char *vde_switch;
char *descr;
void *args;
void *conn;
void *dev;
};
struct vde_init {
char *vde_switch;
char *descr;
int port;
char *group;
int mode;
};
extern const struct net_user_info vde_user_info;
extern void vde_init_libstuff(struct vde_data *vpri, struct vde_init *init);
extern int vde_user_read(void *conn, void *buf, int len);
extern int vde_user_write(void *conn, void *buf, int len);
#endif

129
arch/um/drivers/vde_kern.c
View File

@ -1,129 +0,0 @@
// SPDX-License-Identifier: GPL-2.0
/*
* Copyright (C) 2007 Luca Bigliardi (shammash@artha.org).
*
* Transport usage:
* ethN=vde,<vde_switch>,<mac addr>,<port>,<group>,<mode>,<description>
*
*/
#include <linux/init.h>
#include <linux/netdevice.h>
#include <net_kern.h>
#include <net_user.h>
#include "vde.h"
static void vde_init(struct net_device *dev, void *data)
{
struct vde_init *init = data;
struct uml_net_private *pri;
struct vde_data *vpri;
pri = netdev_priv(dev);
vpri = (struct vde_data *) pri->user;
vpri->vde_switch = init->vde_switch;
vpri->descr = init->descr ? init->descr : "UML vde_transport";
vpri->args = NULL;
vpri->conn = NULL;
vpri->dev = dev;
printk("vde backend - %s, ", vpri->vde_switch ?
vpri->vde_switch : "(default socket)");
vde_init_libstuff(vpri, init);
printk("\n");
}
static int vde_read(int fd, struct sk_buff *skb, struct uml_net_private *lp)
{
struct vde_data *pri = (struct vde_data *) &lp->user;
if (pri->conn != NULL)
return vde_user_read(pri->conn, skb_mac_header(skb),
skb->dev->mtu + ETH_HEADER_OTHER);
printk(KERN_ERR "vde_read - we have no VDECONN to read from");
return -EBADF;
}
static int vde_write(int fd, struct sk_buff *skb, struct uml_net_private *lp)
{
struct vde_data *pri = (struct vde_data *) &lp->user;
if (pri->conn != NULL)
return vde_user_write((void *)pri->conn, skb->data,
skb->len);
printk(KERN_ERR "vde_write - we have no VDECONN to write to");
return -EBADF;
}
static const struct net_kern_info vde_kern_info = {
.init = vde_init,
.protocol = eth_protocol,
.read = vde_read,
.write = vde_write,
};
static int vde_setup(char *str, char **mac_out, void *data)
{
struct vde_init *init = data;
char *remain, *port_str = NULL, *mode_str = NULL, *last;
*init = ((struct vde_init)
{ .vde_switch = NULL,
.descr = NULL,
.port = 0,
.group = NULL,
.mode = 0 });
remain = split_if_spec(str, &init->vde_switch, mac_out, &port_str,
&init->group, &mode_str, &init->descr, NULL);
if (remain != NULL)
printk(KERN_WARNING "vde_setup - Ignoring extra data :"
"'%s'\n", remain);
if (port_str != NULL) {
init->port = simple_strtoul(port_str, &last, 10);
if ((*last != '\0') || (last == port_str)) {
printk(KERN_ERR "vde_setup - Bad port : '%s'\n",
port_str);
return 0;
}
}
if (mode_str != NULL) {
init->mode = simple_strtoul(mode_str, &last, 8);
if ((*last != '\0') || (last == mode_str)) {
printk(KERN_ERR "vde_setup - Bad mode : '%s'\n",
mode_str);
return 0;
}
}
printk(KERN_INFO "Configured vde device: %s\n", init->vde_switch ?
init->vde_switch : "(default socket)");
return 1;
}
static struct transport vde_transport = {
.list = LIST_HEAD_INIT(vde_transport.list),
.name = "vde",
.setup = vde_setup,
.user = &vde_user_info,
.kern = &vde_kern_info,
.private_size = sizeof(struct vde_data),
.setup_size = sizeof(struct vde_init),
};
static int register_vde(void)
{
register_transport(&vde_transport);
return 0;
}
late_initcall(register_vde);

125
arch/um/drivers/vde_user.c
View File

@ -1,125 +0,0 @@
// SPDX-License-Identifier: GPL-2.0
/*
* Copyright (C) 2007 Luca Bigliardi (shammash@artha.org).
*/
#include <stddef.h>
#include <errno.h>
#include <libvdeplug.h>
#include <net_user.h>
#include <um_malloc.h>
#include "vde.h"
static int vde_user_init(void *data, void *dev)
{
struct vde_data *pri = data;
VDECONN *conn = NULL;
int err = -EINVAL;
pri->dev = dev;
conn = vde_open(pri->vde_switch, pri->descr, pri->args);
if (conn == NULL) {
err = -errno;
printk(UM_KERN_ERR "vde_user_init: vde_open failed, "
"errno = %d\n", errno);
return err;
}
printk(UM_KERN_INFO "vde backend - connection opened\n");
pri->conn = conn;
return 0;
}
static int vde_user_open(void *data)
{
struct vde_data *pri = data;
if (pri->conn != NULL)
return vde_datafd(pri->conn);
printk(UM_KERN_WARNING "vde_open - we have no VDECONN to open");
return -EINVAL;
}
static void vde_remove(void *data)
{
struct vde_data *pri = data;
if (pri->conn != NULL) {
printk(UM_KERN_INFO "vde backend - closing connection\n");
vde_close(pri->conn);
pri->conn = NULL;
kfree(pri->args);
pri->args = NULL;
return;
}
printk(UM_KERN_WARNING "vde_remove - we have no VDECONN to remove");
}
const struct net_user_info vde_user_info = {
.init = vde_user_init,
.open = vde_user_open,
.close = NULL,
.remove = vde_remove,
.add_address = NULL,
.delete_address = NULL,
.mtu = ETH_MAX_PACKET,
.max_packet = ETH_MAX_PACKET + ETH_HEADER_OTHER,
};
void vde_init_libstuff(struct vde_data *vpri, struct vde_init *init)
{
struct vde_open_args *args;
vpri->args = uml_kmalloc(sizeof(struct vde_open_args), UM_GFP_KERNEL);
if (vpri->args == NULL) {
printk(UM_KERN_ERR "vde_init_libstuff - vde_open_args "
"allocation failed");
return;
}
args = vpri->args;
args->port = init->port;
args->group = init->group;
args->mode = init->mode ? init->mode : 0700;
args->port ? printk("port %d", args->port) :
printk("undefined port");
}
int vde_user_read(void *conn, void *buf, int len)
{
VDECONN *vconn = conn;
int rv;
if (vconn == NULL)
return 0;
rv = vde_recv(vconn, buf, len, 0);
if (rv < 0) {
if (errno == EAGAIN)
return 0;
return -errno;
}
else if (rv == 0)
return -ENOTCONN;
return rv;
}
int vde_user_write(void *conn, void *buf, int len)
{
VDECONN *vconn = conn;
if (vconn == NULL)
return 0;
return vde_send(vconn, buf, len, 0);
}

1
arch/um/include/shared/os.h
View File

@ -143,7 +143,6 @@ extern int os_access(const char *file, int mode);
extern int os_set_exec_close(int fd);
extern int os_ioctl_generic(int fd, unsigned int cmd, unsigned long arg);
extern int os_get_ifname(int fd, char *namebuf);
extern int os_set_slip(int fd);
extern int os_mode_fd(int fd, int mode);
extern int os_seek_file(int fd, unsigned long long offset);

2
arch/um/os-Linux/Makefile
View File

@ -8,7 +8,7 @@ KCOV_INSTRUMENT := n
obj-y = execvp.o file.o helper.o irq.o main.o mem.o process.o \
registers.o sigio.o signal.o start_up.o time.o tty.o \
umid.o user_syms.o util.o drivers/ skas/
umid.o user_syms.o util.o skas/
CFLAGS_signal.o += -Wframe-larger-than=4096

13
arch/um/os-Linux/drivers/Makefile
View File

@ -1,13 +0,0 @@
# SPDX-License-Identifier: GPL-2.0
#
# Copyright (C) 2000, 2002 Jeff Dike (jdike@karaya.com)
#
ethertap-objs := ethertap_kern.o ethertap_user.o
tuntap-objs := tuntap_kern.o tuntap_user.o
obj-y =
obj-$(CONFIG_UML_NET_ETHERTAP) += ethertap.o
obj-$(CONFIG_UML_NET_TUNTAP) += tuntap.o
include $(srctree)/arch/um/scripts/Makefile.rules

21
arch/um/os-Linux/drivers/etap.h
View File

@ -1,21 +0,0 @@
/* SPDX-License-Identifier: GPL-2.0 */
/*
* Copyright (C) 2001 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
*/
#ifndef __DRIVERS_ETAP_H
#define __DRIVERS_ETAP_H
#include <net_user.h>
struct ethertap_data {
char *dev_name;
char *gate_addr;
int data_fd;
int control_fd;
void *dev;
};
extern const struct net_user_info ethertap_user_info;
#endif

100
arch/um/os-Linux/drivers/ethertap_kern.c
View File

@ -1,100 +0,0 @@
// SPDX-License-Identifier: GPL-2.0
/*
* Copyright (C) 2001 Lennert Buytenhek (buytenh@gnu.org) and
* James Leu (jleu@mindspring.net).
* Copyright (C) 2001 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
* Copyright (C) 2001 by various other people who didn't put their name here.
*/
#include <linux/init.h>
#include <linux/netdevice.h>
#include "etap.h"
#include <net_kern.h>
struct ethertap_init {
char *dev_name;
char *gate_addr;
};
static void etap_init(struct net_device *dev, void *data)
{
struct uml_net_private *pri;
struct ethertap_data *epri;
struct ethertap_init *init = data;
pri = netdev_priv(dev);
epri = (struct ethertap_data *) pri->user;
epri->dev_name = init->dev_name;
epri->gate_addr = init->gate_addr;
epri->data_fd = -1;
epri->control_fd = -1;
epri->dev = dev;
printk(KERN_INFO "ethertap backend - %s", epri->dev_name);
if (epri->gate_addr != NULL)
printk(KERN_CONT ", IP = %s", epri->gate_addr);
printk(KERN_CONT "\n");
}
static int etap_read(int fd, struct sk_buff *skb, struct uml_net_private *lp)
{
int len;
len = net_recvfrom(fd, skb_mac_header(skb),
skb->dev->mtu + 2 + ETH_HEADER_ETHERTAP);
if (len <= 0)
return(len);
skb_pull(skb, 2);
len -= 2;
return len;
}
static int etap_write(int fd, struct sk_buff *skb, struct uml_net_private *lp)
{
skb_push(skb, 2);
return net_send(fd, skb->data, skb->len);
}
const struct net_kern_info ethertap_kern_info = {
.init = etap_init,
.protocol = eth_protocol,
.read = etap_read,
.write = etap_write,
};
static int ethertap_setup(char *str, char **mac_out, void *data)
{
struct ethertap_init *init = data;
*init = ((struct ethertap_init)
{ .dev_name = NULL,
.gate_addr = NULL });
if (tap_setup_common(str, "ethertap", &init->dev_name, mac_out,
&init->gate_addr))
return 0;
if (init->dev_name == NULL) {
printk(KERN_ERR "ethertap_setup : Missing tap device name\n");
return 0;
}
return 1;
}
static struct transport ethertap_transport = {
.list = LIST_HEAD_INIT(ethertap_transport.list),
.name = "ethertap",
.setup = ethertap_setup,
.user = &ethertap_user_info,
.kern = &ethertap_kern_info,
.private_size = sizeof(struct ethertap_data),
.setup_size = sizeof(struct ethertap_init),
};
static int register_ethertap(void)
{
register_transport(&ethertap_transport);
return 0;
}
late_initcall(register_ethertap);

248
arch/um/os-Linux/drivers/ethertap_user.c
View File

@ -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,
};

21
arch/um/os-Linux/drivers/tuntap.h
View File

@ -1,21 +0,0 @@
/* SPDX-License-Identifier: GPL-2.0 */
/*
* Copyright (C) 2001 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
*/
#ifndef __UM_TUNTAP_H
#define __UM_TUNTAP_H
#include <net_user.h>
struct tuntap_data {
char *dev_name;
int fixed_config;
char *gate_addr;
int fd;
void *dev;
};
extern const struct net_user_info tuntap_user_info;
#endif

86
arch/um/os-Linux/drivers/tuntap_kern.c
View File

@ -1,86 +0,0 @@
// SPDX-License-Identifier: GPL-2.0
/*
* Copyright (C) 2001 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
*/
#include <linux/netdevice.h>
#include <linux/init.h>
#include <linux/skbuff.h>
#include <asm/errno.h>
#include <net_kern.h>
#include "tuntap.h"
struct tuntap_init {
char *dev_name;
char *gate_addr;
};
static void tuntap_init(struct net_device *dev, void *data)
{
struct uml_net_private *pri;
struct tuntap_data *tpri;
struct tuntap_init *init = data;
pri = netdev_priv(dev);
tpri = (struct tuntap_data *) pri->user;
tpri->dev_name = init->dev_name;
tpri->fixed_config = (init->dev_name != NULL);
tpri->gate_addr = init->gate_addr;
tpri->fd = -1;
tpri->dev = dev;
printk(KERN_INFO "TUN/TAP backend - ");
if (tpri->gate_addr != NULL)
printk(KERN_CONT "IP = %s", tpri->gate_addr);
printk(KERN_CONT "\n");
}
static int tuntap_read(int fd, struct sk_buff *skb, struct uml_net_private *lp)
{
return net_read(fd, skb_mac_header(skb),
skb->dev->mtu + ETH_HEADER_OTHER);
}
static int tuntap_write(int fd, struct sk_buff *skb, struct uml_net_private *lp)
{
return net_write(fd, skb->data, skb->len);
}
const struct net_kern_info tuntap_kern_info = {
.init = tuntap_init,
.protocol = eth_protocol,
.read = tuntap_read,
.write = tuntap_write,
};
static int tuntap_setup(char *str, char **mac_out, void *data)
{
struct tuntap_init *init = data;
*init = ((struct tuntap_init)
{ .dev_name = NULL,
.gate_addr = NULL });
if (tap_setup_common(str, "tuntap", &init->dev_name, mac_out,
&init->gate_addr))
return 0;
return 1;
}
static struct transport tuntap_transport = {
.list = LIST_HEAD_INIT(tuntap_transport.list),
.name = "tuntap",
.setup = tuntap_setup,
.user = &tuntap_user_info,
.kern = &tuntap_kern_info,
.private_size = sizeof(struct tuntap_data),
.setup_size = sizeof(struct tuntap_init),
};
static int register_tuntap(void)
{
register_transport(&tuntap_transport);
return 0;
}
late_initcall(register_tuntap);

215
arch/um/os-Linux/drivers/tuntap_user.c
View File

@ -1,215 +0,0 @@
// SPDX-License-Identifier: GPL-2.0
/*
* Copyright (C) 2001 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
*/
#include <stdio.h>
#include <unistd.h>
#include <errno.h>
#include <string.h>
#include <linux/if_tun.h>
#include <net/if.h>
#include <sys/ioctl.h>
#include <sys/socket.h>
#include <sys/wait.h>
#include <sys/uio.h>
#include <kern_util.h>
#include <os.h>
#include "tuntap.h"
static int tuntap_user_init(void *data, void *dev)
{
struct tuntap_data *pri = data;
pri->dev = dev;
return 0;
}
static void tuntap_add_addr(unsigned char *addr, unsigned char *netmask,
void *data)
{
struct tuntap_data *pri = data;
tap_check_ips(pri->gate_addr, addr);
if ((pri->fd == -1) || pri->fixed_config)
return;
open_addr(addr, netmask, pri->dev_name);
}
static void tuntap_del_addr(unsigned char *addr, unsigned char *netmask,
void *data)
{
struct tuntap_data *pri = data;
if ((pri->fd == -1) || pri->fixed_config)
return;
close_addr(addr, netmask, pri->dev_name);
}
struct tuntap_pre_exec_data {
int stdout_fd;
int close_me;
};
static void tuntap_pre_exec(void *arg)
{
struct tuntap_pre_exec_data *data = arg;
dup2(data->stdout_fd, 1);
close(data->close_me);
}
static int tuntap_open_tramp(char *gate, int *fd_out, int me, int remote,
char *buffer, int buffer_len, int *used_out)
{
struct tuntap_pre_exec_data data;
char version_buf[sizeof("nnnnn\0")];
char *argv[] = { "uml_net", version_buf, "tuntap", "up", gate,
NULL };
char buf[CMSG_SPACE(sizeof(*fd_out))];
struct msghdr msg;
struct cmsghdr *cmsg;
struct iovec iov;
int pid, n, err;
sprintf(version_buf, "%d", UML_NET_VERSION);
data.stdout_fd = remote;
data.close_me = me;
pid = run_helper(tuntap_pre_exec, &data, argv);
if (pid < 0)
return pid;
close(remote);
msg.msg_name = NULL;
msg.msg_namelen = 0;
if (buffer != NULL) {
iov = ((struct iovec) { buffer, buffer_len });
msg.msg_iov = &iov;
msg.msg_iovlen = 1;
}
else {
msg.msg_iov = NULL;
msg.msg_iovlen = 0;
}
msg.msg_control = buf;
msg.msg_controllen = sizeof(buf);
msg.msg_flags = 0;
n = recvmsg(me, &msg, 0);
*used_out = n;
if (n < 0) {
err = -errno;
printk(UM_KERN_ERR "tuntap_open_tramp : recvmsg failed - "
"errno = %d\n", errno);
return err;
}
helper_wait(pid);
cmsg = CMSG_FIRSTHDR(&msg);
if (cmsg == NULL) {
printk(UM_KERN_ERR "tuntap_open_tramp : didn't receive a "
"message\n");
return -EINVAL;
}
if ((cmsg->cmsg_level != SOL_SOCKET) ||
(cmsg->cmsg_type != SCM_RIGHTS)) {
printk(UM_KERN_ERR "tuntap_open_tramp : didn't receive a "
"descriptor\n");
return -EINVAL;
}
*fd_out = ((int *) CMSG_DATA(cmsg))[0];
os_set_exec_close(*fd_out);
return 0;
}
static int tuntap_open(void *data)
{
struct ifreq ifr;
struct tuntap_data *pri = data;
char *output, *buffer;
int err, fds[2], len, used;
err = tap_open_common(pri->dev, pri->gate_addr);
if (err < 0)
return err;
if (pri->fixed_config) {
pri->fd = os_open_file("/dev/net/tun",
of_cloexec(of_rdwr(OPENFLAGS())), 0);
if (pri->fd < 0) {
printk(UM_KERN_ERR "Failed to open /dev/net/tun, "
"err = %d\n", -pri->fd);
return pri->fd;
}
memset(&ifr, 0, sizeof(ifr));
ifr.ifr_flags = IFF_TAP | IFF_NO_PI;
strscpy(ifr.ifr_name, pri->dev_name);
if (ioctl(pri->fd, TUNSETIFF, &ifr) < 0) {
err = -errno;
printk(UM_KERN_ERR "TUNSETIFF failed, errno = %d\n",
errno);
close(pri->fd);
return err;
}
}
else {
err = socketpair(AF_UNIX, SOCK_DGRAM, 0, fds);
if (err) {
err = -errno;
printk(UM_KERN_ERR "tuntap_open : socketpair failed - "
"errno = %d\n", errno);
return err;
}
buffer = get_output_buffer(&len);
if (buffer != NULL)
len--;
used = 0;
err = tuntap_open_tramp(pri->gate_addr, &pri->fd, fds[0],
fds[1], buffer, len, &used);
output = buffer;
if (err < 0) {
printk("%s", output);
free_output_buffer(buffer);
printk(UM_KERN_ERR "tuntap_open_tramp failed - "
"err = %d\n", -err);
return err;
}
pri->dev_name = uml_strdup(buffer);
output += IFNAMSIZ;
printk("%s", output);
free_output_buffer(buffer);
close(fds[0]);
iter_addresses(pri->dev, open_addr, pri->dev_name);
}
return pri->fd;
}
static void tuntap_close(int fd, void *data)
{
struct tuntap_data *pri = data;
if (!pri->fixed_config)
iter_addresses(pri->dev, close_addr, pri->dev_name);
close(fd);
pri->fd = -1;
}
const struct net_user_info tuntap_user_info = {
.init = tuntap_user_init,
.open = tuntap_open,
.close = tuntap_close,
.remove = NULL,
.add_address = tuntap_add_addr,
.delete_address = tuntap_del_addr,
.mtu = ETH_MAX_PACKET,
.max_packet = ETH_MAX_PACKET + ETH_HEADER_OTHER,
};

15
arch/um/os-Linux/file.c
View File

@ -106,21 +106,6 @@ int os_get_ifname(int fd, char* namebuf)
return 0;
}
int os_set_slip(int fd)
{
int disc, sencap;
disc = N_SLIP;
if (ioctl(fd, TIOCSETD, &disc) < 0)
return -errno;
sencap = 0;
if (ioctl(fd, SIOCSIFENCAP, &sencap) < 0)
return -errno;
return 0;
}
int os_mode_fd(int fd, int mode)
{
int err;