mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-13 04:56:42 +07:00
8b8e658b16
The VNET_LE flag was introduced to fix accesses to virtio 1.0 headers that are always little-endian. It can also be used to handle the special case of a legacy little-endian device implemented by a big-endian host. Let's add a flag and ioctls for big-endian devices as well. If both flags are set, little-endian wins. Since this is isn't a common usecase, the feature is controlled by a kernel config option (not set by default). Both macvtap and tun are covered by this patch since they share the same API with userland. Signed-off-by: Greg Kurz <gkurz@linux.vnet.ibm.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com> Reviewed-by: David Gibson <david@gibson.dropbear.id.au>
108 lines
3.7 KiB
C
108 lines
3.7 KiB
C
/*
|
|
* Universal TUN/TAP device driver.
|
|
* Copyright (C) 1999-2000 Maxim Krasnyansky <max_mk@yahoo.com>
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation; either version 2 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*/
|
|
|
|
#ifndef _UAPI__IF_TUN_H
|
|
#define _UAPI__IF_TUN_H
|
|
|
|
#include <linux/types.h>
|
|
#include <linux/if_ether.h>
|
|
#include <linux/filter.h>
|
|
|
|
/* Read queue size */
|
|
#define TUN_READQ_SIZE 500
|
|
/* TUN device type flags: deprecated. Use IFF_TUN/IFF_TAP instead. */
|
|
#define TUN_TUN_DEV IFF_TUN
|
|
#define TUN_TAP_DEV IFF_TAP
|
|
#define TUN_TYPE_MASK 0x000f
|
|
|
|
/* Ioctl defines */
|
|
#define TUNSETNOCSUM _IOW('T', 200, int)
|
|
#define TUNSETDEBUG _IOW('T', 201, int)
|
|
#define TUNSETIFF _IOW('T', 202, int)
|
|
#define TUNSETPERSIST _IOW('T', 203, int)
|
|
#define TUNSETOWNER _IOW('T', 204, int)
|
|
#define TUNSETLINK _IOW('T', 205, int)
|
|
#define TUNSETGROUP _IOW('T', 206, int)
|
|
#define TUNGETFEATURES _IOR('T', 207, unsigned int)
|
|
#define TUNSETOFFLOAD _IOW('T', 208, unsigned int)
|
|
#define TUNSETTXFILTER _IOW('T', 209, unsigned int)
|
|
#define TUNGETIFF _IOR('T', 210, unsigned int)
|
|
#define TUNGETSNDBUF _IOR('T', 211, int)
|
|
#define TUNSETSNDBUF _IOW('T', 212, int)
|
|
#define TUNATTACHFILTER _IOW('T', 213, struct sock_fprog)
|
|
#define TUNDETACHFILTER _IOW('T', 214, struct sock_fprog)
|
|
#define TUNGETVNETHDRSZ _IOR('T', 215, int)
|
|
#define TUNSETVNETHDRSZ _IOW('T', 216, int)
|
|
#define TUNSETQUEUE _IOW('T', 217, int)
|
|
#define TUNSETIFINDEX _IOW('T', 218, unsigned int)
|
|
#define TUNGETFILTER _IOR('T', 219, struct sock_fprog)
|
|
#define TUNSETVNETLE _IOW('T', 220, int)
|
|
#define TUNGETVNETLE _IOR('T', 221, int)
|
|
/* The TUNSETVNETBE and TUNGETVNETBE ioctls are for cross-endian support on
|
|
* little-endian hosts. Not all kernel configurations support them, but all
|
|
* configurations that support SET also support GET.
|
|
*/
|
|
#define TUNSETVNETBE _IOW('T', 222, int)
|
|
#define TUNGETVNETBE _IOR('T', 223, int)
|
|
|
|
/* TUNSETIFF ifr flags */
|
|
#define IFF_TUN 0x0001
|
|
#define IFF_TAP 0x0002
|
|
#define IFF_NO_PI 0x1000
|
|
/* This flag has no real effect */
|
|
#define IFF_ONE_QUEUE 0x2000
|
|
#define IFF_VNET_HDR 0x4000
|
|
#define IFF_TUN_EXCL 0x8000
|
|
#define IFF_MULTI_QUEUE 0x0100
|
|
#define IFF_ATTACH_QUEUE 0x0200
|
|
#define IFF_DETACH_QUEUE 0x0400
|
|
/* read-only flag */
|
|
#define IFF_PERSIST 0x0800
|
|
#define IFF_NOFILTER 0x1000
|
|
|
|
/* Socket options */
|
|
#define TUN_TX_TIMESTAMP 1
|
|
|
|
/* Features for GSO (TUNSETOFFLOAD). */
|
|
#define TUN_F_CSUM 0x01 /* You can hand me unchecksummed packets. */
|
|
#define TUN_F_TSO4 0x02 /* I can handle TSO for IPv4 packets */
|
|
#define TUN_F_TSO6 0x04 /* I can handle TSO for IPv6 packets */
|
|
#define TUN_F_TSO_ECN 0x08 /* I can handle TSO with ECN bits. */
|
|
#define TUN_F_UFO 0x10 /* I can handle UFO packets */
|
|
|
|
/* Protocol info prepended to the packets (when IFF_NO_PI is not set) */
|
|
#define TUN_PKT_STRIP 0x0001
|
|
struct tun_pi {
|
|
__u16 flags;
|
|
__be16 proto;
|
|
};
|
|
|
|
/*
|
|
* Filter spec (used for SETXXFILTER ioctls)
|
|
* This stuff is applicable only to the TAP (Ethernet) devices.
|
|
* If the count is zero the filter is disabled and the driver accepts
|
|
* all packets (promisc mode).
|
|
* If the filter is enabled in order to accept broadcast packets
|
|
* broadcast addr must be explicitly included in the addr list.
|
|
*/
|
|
#define TUN_FLT_ALLMULTI 0x0001 /* Accept all multicast packets */
|
|
struct tun_filter {
|
|
__u16 flags; /* TUN_FLT_ flags see above */
|
|
__u16 count; /* Number of addresses */
|
|
__u8 addr[0][ETH_ALEN];
|
|
};
|
|
|
|
#endif /* _UAPI__IF_TUN_H */
|