motorhead/qemu
1
0
Fork 0
mirror of https://github.com/Motorhead1991/qemu.git synced 2025-08-03 15:53:54 -06:00
Code Issues Projects Releases Packages Wiki Activity Actions

vhost-user: add VHOST_USER_GET_QUEUE_NUM message

Browse source 
This is for querying how many queues the backend supports if it has mq
support(when VHOST_USER_PROTOCOL_F_MQ flag is set from the quried
protocol features).

vhost_net_get_max_queues() is the interface to export that value, and
to tell if the backend supports # of queues user requested, which is
done in the following patch.

Signed-off-by: Yuanhan Liu <yuanhan.liu@linux.intel.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Yuanhan Liu <yuanhan.liu@linux.intel.com>
Tested-by: Marcel Apfelbaum <marcel@redhat.com>
This commit is contained in:
Yuanhan Liu 2015-09-23 12:19:58 +08:00 • committed by Michael S. Tsirkin
parent d1f8b30ec8
commit e2051e9e00
5 changed files with 39 additions and 1 deletions
Download patch file Download diff file Expand all files Collapse all files

15
hw/virtio/vhost-user.c
View file

@ -25,7 +25,9 @@
#define VHOST_MEMORY_MAX_NREGIONS 8
#define VHOST_USER_F_PROTOCOL_FEATURES 30
#define VHOST_USER_PROTOCOL_FEATURE_MASK 0x0ULL
#define VHOST_USER_PROTOCOL_FEATURE_MASK 0x1ULL
#define VHOST_USER_PROTOCOL_F_MQ 0
typedef enum VhostUserRequest {
VHOST_USER_NONE = 0,
@ -45,6 +47,7 @@ typedef enum VhostUserRequest {
VHOST_USER_SET_VRING_ERR = 14,
VHOST_USER_GET_PROTOCOL_FEATURES = 15,
VHOST_USER_SET_PROTOCOL_FEATURES = 16,
VHOST_USER_GET_QUEUE_NUM = 17,
VHOST_USER_MAX
} VhostUserRequest;
@ -211,6 +214,7 @@ static int vhost_user_call(struct vhost_dev *dev, unsigned long int request,
switch (msg_request) {
case VHOST_USER_GET_FEATURES:
case VHOST_USER_GET_PROTOCOL_FEATURES:
case VHOST_USER_GET_QUEUE_NUM:
need_reply = 1;
break;
@ -315,6 +319,7 @@ static int vhost_user_call(struct vhost_dev *dev, unsigned long int request,
switch (msg_request) {
case VHOST_USER_GET_FEATURES:
case VHOST_USER_GET_PROTOCOL_FEATURES:
case VHOST_USER_GET_QUEUE_NUM:
if (msg.size != sizeof(m.u64)) {
error_report("Received bad msg size.");
return -1;
@ -366,6 +371,14 @@ static int vhost_user_init(struct vhost_dev *dev, void *opaque)
if (err < 0) {
return err;
}
/* query the max queues we support if backend supports Multiple Queue */
if (dev->protocol_features & (1ULL << VHOST_USER_PROTOCOL_F_MQ)) {
err = vhost_user_call(dev, VHOST_USER_GET_QUEUE_NUM, &dev->max_queues);
if (err < 0) {
return err;
}
}
}
return 0;