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vhost_net: Add NetClientInfo start callback 

This is used by the backend to perform actions before the device is
started.

In particular, vdpa net use it to map CVQ buffers to the device, so it
can send control commands using them.

Signed-off-by: Eugenio Pérez <eperezma@redhat.com>
Acked-by: Jason Wang <jasowang@redhat.com>
Signed-off-by: Jason Wang <jasowang@redhat.com>
This commit is contained in:
Eugenio Pérez 2022-08-23 20:30:30 +02:00 committed by Jason Wang
parent d368c0b052
commit eb92b75380
2 changed files with 9 additions and 0 deletions
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7
hw/net/vhost_net.c
View File

@ -244,6 +244,13 @@ static int vhost_net_start_one(struct vhost_net *net,
struct vhost_vring_file file = { };
int r;
if (net->nc->info->start) {
r = net->nc->info->start(net->nc);
if (r < 0) {
return r;
}
}
r = vhost_dev_enable_notifiers(&net->dev, dev);
if (r < 0) {
goto fail_notifiers;

2
include/net/net.h
View File

@ -44,6 +44,7 @@ typedef struct NICConf {
typedef void (NetPoll)(NetClientState *, bool enable);
typedef bool (NetCanReceive)(NetClientState *);
typedef int (NetStart)(NetClientState *);
typedef ssize_t (NetReceive)(NetClientState *, const uint8_t *, size_t);
typedef ssize_t (NetReceiveIOV)(NetClientState *, const struct iovec *, int);
typedef void (NetCleanup) (NetClientState *);
@ -71,6 +72,7 @@ typedef struct NetClientInfo {
NetReceive *receive_raw;
NetReceiveIOV *receive_iov;
NetCanReceive *can_receive;
NetStart *start;
NetCleanup *cleanup;
LinkStatusChanged *link_status_changed;
QueryRxFilter *query_rx_filter;