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vhost_net: add NetClientState->load() callback 

It allows per-net client operations right after device's successful
start. In particular, to load the device status.

Vhost-vdpa net will use it to add the CVQ buffers to restore the device
status.

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 20:30:35 +02:00 committed by Jason Wang
parent be4278b65f
commit 539573c317
2 changed files with 9 additions and 0 deletions
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7
hw/net/vhost_net.c
View File

@ -281,6 +281,13 @@ static int vhost_net_start_one(struct vhost_net *net,
} }
} }
} }
if (net->nc->info->load) {
r = net->nc->info->load(net->nc);
if (r < 0) {
goto fail;
}
}
return 0; return 0;
fail: fail:
file.fd = -1; file.fd = -1;

2
include/net/net.h
View File

@ -45,6 +45,7 @@ typedef struct NICConf {
typedef void (NetPoll)(NetClientState *, bool enable); typedef void (NetPoll)(NetClientState *, bool enable);
typedef bool (NetCanReceive)(NetClientState *); typedef bool (NetCanReceive)(NetClientState *);
typedef int (NetStart)(NetClientState *); typedef int (NetStart)(NetClientState *);
typedef int (NetLoad)(NetClientState *);
typedef void (NetStop)(NetClientState *); typedef void (NetStop)(NetClientState *);
typedef ssize_t (NetReceive)(NetClientState *, const uint8_t *, size_t); typedef ssize_t (NetReceive)(NetClientState *, const uint8_t *, size_t);
typedef ssize_t (NetReceiveIOV)(NetClientState *, const struct iovec *, int); typedef ssize_t (NetReceiveIOV)(NetClientState *, const struct iovec *, int);
@ -74,6 +75,7 @@ typedef struct NetClientInfo {
NetReceiveIOV *receive_iov; NetReceiveIOV *receive_iov;
NetCanReceive *can_receive; NetCanReceive *can_receive;
NetStart *start; NetStart *start;
NetLoad *load;
NetStop *stop; NetStop *stop;
NetCleanup *cleanup; NetCleanup *cleanup;
LinkStatusChanged *link_status_changed; LinkStatusChanged *link_status_changed;