Hello all:
This seires is an update of last version of multiqueue support to add multiqueue
capability to both tap and virtio-net.
Some kinds of tap backends has (macvatp in linux) or would (tap) support
multiqueue. In such kind of tap backend, each file descriptor of a tap is a
qeueu and ioctls were prodived to attach an exist tap file descriptor to the
tun/tap device. So the patch let qemu to use this kind of backend, and let it
can transmit and receving packets through multiple file descriptors.
Patch 1 introduce a new help to get all matched options, after this patch, we
could pass multiple file descriptors to a signle netdev by:
qemu -netdev tap,id=hn0,fd=10,fd=11,...
Patch 2 introduce generic helpers in tap to attach or detach a file descriptor
from a tap device, emulated nics could use this helper to enable/disable queues.
Patch 3 modifies the NICState to allow multiple VLANClientState to be stored in
it, with this patch, qemu has basic support of multiple capable tap backend.
Patch 4 converts virtio-net/vhost to be multiple capable. The vhost device were
created per tx/rx queue pairs as usual.
Changes from V1:
- rebase to the latest
- fix memory leak in parse_netdev
- fix guest notifiers assignment/de-assignment
- changes the command lines to:
qemu -netdev tap,queues=2 -device virtio-net-pci,queues=2
TODO:
- netdev_add
- bridge helper for multiple queue backend
References:
- V1 http://comments.gmane.org/gmane.comp.emulators.qemu/100481
Please review and comments.
---
Jason Wang (4):
option: introduce qemu_get_opt_all()
tap: multiqueue support
net: multiqueue support
virtio-net: add multiqueue support
hw/dp8393x.c | 2
hw/mcf_fec.c | 2
hw/qdev-properties.c | 33 +++-
hw/qdev.h | 3
hw/vhost.c | 58 ++++--
hw/vhost.h | 1
hw/vhost_net.c | 7 +
hw/vhost_net.h | 2
hw/virtio-net.c | 461 +++++++++++++++++++++++++++++++++-----------------
hw/virtio-net.h | 3
net.c | 62 ++++++-
net.h | 16 +-
net/tap-aix.c | 13 +
net/tap-bsd.c | 13 +
net/tap-haiku.c | 13 +
net/tap-linux.c | 55 ++++++
net/tap-linux.h | 3
net/tap-solaris.c | 13 +
net/tap-win32.c | 11 +
net/tap.c | 189 +++++++++++++-------
net/tap.h | 7 +
qemu-option.c | 19 ++
qemu-option.h | 2
23 files changed, 714 insertions(+), 274 deletions(-)
--
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