diff mbox series

[v6,05/12] vhost_net: Add NetClientInfo prepare callback

Message ID 20220804181722.701067-6-eperezma@redhat.com
State New
Headers show
Series NIC vhost-vdpa state restore via Shadow CVQ | expand

Commit Message

Eugenio Perez Martin Aug. 4, 2022, 6:17 p.m. UTC 
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>
---
 include/net/net.h  | 2 ++
 hw/net/vhost_net.c | 7 +++++++
 2 files changed, 9 insertions(+)
diff mbox series

Patch

diff --git a/include/net/net.h b/include/net/net.h
index 523136c7ac..3416bb3d46 100644
--- a/include/net/net.h
+++ b/include/net/net.h
@@ -44,6 +44,7 @@  typedef struct NICConf {
 
 typedef void (NetPoll)(NetClientState *, bool enable);
 typedef bool (NetCanReceive)(NetClientState *);
+typedef int (NetPrepare)(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;
+    NetPrepare *prepare;
     NetCleanup *cleanup;
     LinkStatusChanged *link_status_changed;
     QueryRxFilter *query_rx_filter;
diff --git a/hw/net/vhost_net.c b/hw/net/vhost_net.c
index ccac5b7a64..e1150d7532 100644
--- a/hw/net/vhost_net.c
+++ b/hw/net/vhost_net.c
@@ -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->prepare) {
+        r = net->nc->info->prepare(net->nc);
+        if (r < 0) {
+            return r;
+        }
+    }
+
     r = vhost_dev_enable_notifiers(&net->dev, dev);
     if (r < 0) {
         goto fail_notifiers;