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94fdc6d030
This patch add basic multiqueue support for Linux. When multiqueue is needed, we will first check whether kernel support multiqueue tap before creating more queues. Two new functions tap_fd_enable() and tap_fd_disable() were introduced to enable and disable a specific queue. Since the multiqueue is only supported in Linux, return error on other platforms. Signed-off-by: Jason Wang <jasowang@redhat.com> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
49 lines
1.9 KiB
C
49 lines
1.9 KiB
C
/*
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* QEMU System Emulator
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*
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* Copyright (c) 2003-2008 Fabrice Bellard
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* Copyright (c) 2009 Red Hat, Inc.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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#ifndef QEMU_TAP_H
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#define QEMU_TAP_H
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#include "qemu-common.h"
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#include "qapi-types.h"
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#define DEFAULT_NETWORK_SCRIPT "/etc/qemu-ifup"
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#define DEFAULT_NETWORK_DOWN_SCRIPT "/etc/qemu-ifdown"
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int tap_open(char *ifname, int ifname_size, int *vnet_hdr, int vnet_hdr_required);
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ssize_t tap_read_packet(int tapfd, uint8_t *buf, int maxlen);
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int tap_set_sndbuf(int fd, const NetdevTapOptions *tap);
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int tap_probe_vnet_hdr(int fd);
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int tap_probe_vnet_hdr_len(int fd, int len);
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int tap_probe_has_ufo(int fd);
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void tap_fd_set_offload(int fd, int csum, int tso4, int tso6, int ecn, int ufo);
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void tap_fd_set_vnet_hdr_len(int fd, int len);
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int tap_fd_enable(int fd);
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int tap_fd_disable(int fd);
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#endif /* QEMU_TAP_H */
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