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dd8ac030fb
virNetDevTapCreateInBridgePort() has always set the new tap device to the current MTU of the bridge it's being attached to. There is one case where we will want to set the new tap device to a different (usually larger) MTU - if that's done with the very first device added to the bridge, the bridge's MTU will be set to the device's MTU. This patch allows for that possibility by adding "int mtu" to the arg list for virNetDevTapCreateInBridgePort(), but all callers are sending -1, so it doesn't yet have any effect. Since the requested MTU isn't necessarily what is used in the end (for example, if there is no MTU requested, the tap device will be set to the current MTU of the bridge), and the hypervisor may want to know the actual MTU used, we also return the actual MTU to the caller (if actualMTU is non-NULL).
85 lines
3.2 KiB
C
85 lines
3.2 KiB
C
/*
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* Copyright (C) 2007-2011, 2013 Red Hat, Inc.
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library. If not, see
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* <http://www.gnu.org/licenses/>.
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*
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* Authors:
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* Mark McLoughlin <markmc@redhat.com>
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* Daniel P. Berrange <berrange@redhat.com>
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*/
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#ifndef __VIR_NETDEV_TAP_H__
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# define __VIR_NETDEV_TAP_H__
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# include "internal.h"
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# include "virnetdevvportprofile.h"
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# include "virnetdevvlan.h"
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# ifdef __FreeBSD__
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/* This should be defined on OSes that don't automatically
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* cleanup released devices */
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# define VIR_NETDEV_TAP_REQUIRE_MANUAL_CLEANUP 1
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# endif
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int virNetDevTapCreate(char **ifname,
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const char *tunpath,
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int *tapfd,
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size_t tapfdSize,
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unsigned int flags)
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ATTRIBUTE_NONNULL(1) ATTRIBUTE_RETURN_CHECK;
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int virNetDevTapDelete(const char *ifname,
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const char *tunpath)
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ATTRIBUTE_NONNULL(1) ATTRIBUTE_RETURN_CHECK;
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int virNetDevTapGetName(int tapfd, char **ifname)
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ATTRIBUTE_NONNULL(2) ATTRIBUTE_RETURN_CHECK;
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char* virNetDevTapGetRealDeviceName(char *ifname)
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ATTRIBUTE_NONNULL(1) ATTRIBUTE_RETURN_CHECK;
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typedef enum {
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VIR_NETDEV_TAP_CREATE_NONE = 0,
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/* Bring the interface up */
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VIR_NETDEV_TAP_CREATE_IFUP = 1 << 0,
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/* Enable IFF_VNET_HDR on the tap device */
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VIR_NETDEV_TAP_CREATE_VNET_HDR = 1 << 1,
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/* Set this interface's MAC as the bridge's MAC address */
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VIR_NETDEV_TAP_CREATE_USE_MAC_FOR_BRIDGE = 1 << 2,
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/* The device will persist after the file descriptor is closed */
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VIR_NETDEV_TAP_CREATE_PERSIST = 1 << 3,
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} virNetDevTapCreateFlags;
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int virNetDevTapCreateInBridgePort(const char *brname,
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char **ifname,
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const virMacAddr *macaddr,
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const unsigned char *vmuuid,
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const char *tunpath,
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int *tapfd,
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size_t tapfdSize,
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virNetDevVPortProfilePtr virtPortProfile,
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virNetDevVlanPtr virtVlan,
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unsigned int mtu,
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unsigned int *actualMTU,
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unsigned int flags)
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ATTRIBUTE_NONNULL(1) ATTRIBUTE_NONNULL(2) ATTRIBUTE_NONNULL(3)
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ATTRIBUTE_RETURN_CHECK;
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int virNetDevTapInterfaceStats(const char *ifname,
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virDomainInterfaceStatsPtr stats)
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ATTRIBUTE_NONNULL(1) ATTRIBUTE_RETURN_CHECK;
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#endif /* __VIR_NETDEV_TAP_H__ */
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