This patch set introduces 2 more vhost user messages: VHOST_USER_GET_QUEUE_NUM,
for querying how many queues the backend supports, and
VHOST_USER_SET_VRING_ENABLE,
for enabling/disabling a specific virt queue.
Both of the two new messages are treated as vhost protocol extension,
and that's why Michaels's patch "vhost-user: add protocol feature
negotiation" is also included here.
Patch 1-5 are all prepare works for actually enabling multiple queue.
Patch 6 is the major patch for enabling multiple queue, which also tries
to address two major concerns from Michael: no feedback from backend if
it can't support # of requested queues, and all messages are sent N time.
It also fixes a hidden bug.
Patch 7 introduces the VHOST_USER_SET_VRING_ENABLE message, to enable
or disable a specific vring.
Note that I haven't done any formal test yet, it just passes build
test and basic functional test, such as it does exit when backend
doesn't support # of requested queues. Here I sent it out just for
more comments, and for avoiding spending too much effort on the wrong
track.
v9: - Per suggested by Jason Wang, patch 5 introduces a new vhost
backend method: vhost_backend_get_vq_index().
- Use qemu_find_net_clients_except() at net/vhost-user.c for
gathering all related ncs so that we could register chr dev
event handler once. Which is also suggested by Jason Wang.
Thanks.
--yliu
---
Changchun Ouyang (2):
vhost-user: add multiple queue support
vhost-user: add a new message to disable/enable a specific virt queue.
Michael S. Tsirkin (1):
vhost-user: add protocol feature negotiation
Yuanhan Liu (4):
vhost-user: use VHOST_USER_XXX macro for switch statement
vhost: rename VHOST_RESET_OWNER to VHOST_RESET_DEVICE
vhost-user: add VHOST_USER_GET_QUEUE_NUM message
vhost: introduce vhost_backend_get_vq_index method
docs/specs/vhost-user.txt | 75 +++++++++++++++++++-
hw/net/vhost_net.c | 39 ++++++++--
hw/net/virtio-net.c | 8 +++
hw/virtio/vhost-backend.c | 10 ++-
hw/virtio/vhost-user.c | 143 +++++++++++++++++++++++++++++++------
hw/virtio/vhost.c | 20 +++---
include/hw/virtio/vhost-backend.h | 4 ++
include/hw/virtio/vhost.h | 2 +
include/net/vhost_net.h | 3 +
linux-headers/linux/vhost.h | 2 +-
net/vhost-user.c | 146 +++++++++++++++++++++++++++-----------
qapi-schema.json | 6 +-
qemu-options.hx | 5 +-
tests/vhost-user-test.c | 2 +-
14 files changed, 380 insertions(+), 85 deletions(-)