[v7,06/12] vhost_net: Add NetClientInfo stop callback

Commit Message

Eugenio Perez Martin Aug. 4, 2022, 6:28 p.m. UTC

Used by the backend to perform actions after the device is stopped.

In particular, vdpa net use it to unmap CVQ buffers to the device,
cleaning the actions performend in prepare().

Signed-off-by: Eugenio Pérez <[e-mail]>
---
 include/net/net.h  | 2 ++
 hw/net/vhost_net.c | 3 +++
 2 files changed, 5 insertions(+)

Patch

diff --git a/include/net/net.h b/include/net/net.h
index 3416bb3d46..7aa1ec0974 100644
--- a/include/net/net.h
+++ b/include/net/net.h
@@ -45,6 +45,7 @@  typedef struct NICConf {
 typedef void (NetPoll)(NetClientState *, bool enable);
 typedef bool (NetCanReceive)(NetClientState *);
 typedef int (NetPrepare)(NetClientState *);
+typedef void (NetStop)(NetClientState *);
 typedef ssize_t (NetReceive)(NetClientState *, const uint8_t *, size_t);
 typedef ssize_t (NetReceiveIOV)(NetClientState *, const struct iovec *, int);
 typedef void (NetCleanup) (NetClientState *);
@@ -73,6 +74,7 @@  typedef struct NetClientInfo {
     NetReceiveIOV *receive_iov;
     NetCanReceive *can_receive;
     NetPrepare *prepare;
+    NetStop *stop;
     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 e1150d7532..10bca15446 100644
--- a/hw/net/vhost_net.c
+++ b/hw/net/vhost_net.c
@@ -320,6 +320,9 @@  static void vhost_net_stop_one(struct vhost_net *net,
         net->nc->info->poll(net->nc, true);
     }
     vhost_dev_stop(&net->dev, dev);
+    if (net->nc->info->stop) {
+        net->nc->info->stop(net->nc);
+    }
     vhost_dev_disable_notifiers(&net->dev, dev);
 }