mirror of
https://github.com/xemu-project/xemu.git
synced 2024-11-24 03:59:52 +00:00
264986e2c8
Recently, linux support multiqueue tap which could let userspace call TUNSETIFF for a signle device many times to create multiple file descriptors as independent queues. User could also enable/disabe a specific queue through TUNSETQUEUE. The patch adds the generic infrastructure to create multiqueue taps. To achieve this a new parameter "queues" were introduced to specify how many queues were expected to be created for tap by qemu itself. Alternatively, management could also pass multiple pre-created tap file descriptors separated with ':' through a new parameter fds like -netdev tap,id=hn0,fds="X:Y:..:Z". Multiple vhost file descriptors could also be passed in this way. Each TAPState were still associated to a tap fd, which mean multiple TAPStates were created when user needs multiqueue taps. Since each TAPState contains one NetClientState, with the multiqueue nic support, an N peers of NetClientState were built up. A new parameter, mq_required were introduce in tap_open() to create multiqueue tap fds. Signed-off-by: Jason Wang <jasowang@redhat.com> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
78 lines
1.9 KiB
C
78 lines
1.9 KiB
C
/*
|
|
* QEMU System Emulator
|
|
*
|
|
* Copyright (c) 2003-2008 Fabrice Bellard
|
|
*
|
|
* Permission is hereby granted, free of charge, to any person obtaining a copy
|
|
* of this software and associated documentation files (the "Software"), to deal
|
|
* in the Software without restriction, including without limitation the rights
|
|
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
|
|
* copies of the Software, and to permit persons to whom the Software is
|
|
* furnished to do so, subject to the following conditions:
|
|
*
|
|
* The above copyright notice and this permission notice shall be included in
|
|
* all copies or substantial portions of the Software.
|
|
*
|
|
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
|
|
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
|
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
|
|
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
|
|
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
|
|
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
|
|
* THE SOFTWARE.
|
|
*/
|
|
|
|
#include "tap_int.h"
|
|
#include <stdio.h>
|
|
|
|
int tap_open(char *ifname, int ifname_size, int *vnet_hdr,
|
|
int vnet_hdr_required, int mq_required)
|
|
{
|
|
fprintf(stderr, "no tap on Haiku\n");
|
|
return -1;
|
|
}
|
|
|
|
int tap_set_sndbuf(int fd, const NetdevTapOptions *tap)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
int tap_probe_vnet_hdr(int fd)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
int tap_probe_has_ufo(int fd)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
int tap_probe_vnet_hdr_len(int fd, int len)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
void tap_fd_set_vnet_hdr_len(int fd, int len)
|
|
{
|
|
}
|
|
|
|
void tap_fd_set_offload(int fd, int csum, int tso4,
|
|
int tso6, int ecn, int ufo)
|
|
{
|
|
}
|
|
|
|
int tap_fd_enable(int fd)
|
|
{
|
|
return -1;
|
|
}
|
|
|
|
int tap_fd_disable(int fd)
|
|
{
|
|
return -1;
|
|
}
|
|
|
|
int tap_fd_get_ifname(int fd, char *ifname)
|
|
{
|
|
return -1;
|
|
}
|