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From: Li Feng <fengli@smartx.com>
To: Maxime Coquelin <maxime.coquelin@redhat.com>,
Tiwei Bie <tiwei.bie@intel.com>, Zhihong Wang <zhihong.wang@intel.com>
Cc: dev@dpdk.org,
Li Feng <fengli@smartx.com>
Date: Wed, 4 Dec 2019 13:13:20 +0800
Message-Id: <20191204051320.26326-1-fengli@smartx.com>
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Subject: [dpdk-dev] [PATCH v2] vhost: add config change slave msg support
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This msg is used to notify qemu that should get the config of backend.
For example, vhost-user-blk uses this msg to notify guest os the
compacity of backend has changed.
Signed-off-by: Li Feng <fengli@smartx.com>
---
v2:
* Fix a little log typo.
lib/librte_vhost/vhost_user.c | 31 +++++++++++++++++++++++++++++++
lib/librte_vhost/vhost_user.h | 2 ++
2 files changed, 33 insertions(+)
diff --git a/lib/librte_vhost/vhost_user.c b/lib/librte_vhost/vhost_user.c
index 0cfb8b792..10f2e47d5 100644
--- a/lib/librte_vhost/vhost_user.c
+++ b/lib/librte_vhost/vhost_user.c
@@ -2840,6 +2840,37 @@ vhost_user_iotlb_miss(struct virtio_net *dev, uint64=
_t iova, uint8_t perm)
return 0;
}
=20
+static int
+vhost_user_slave_config_change(struct virtio_net *dev)
+{
+ int ret;
+ struct VhostUserMsg msg =3D {
+ .request.slave =3D VHOST_USER_SLAVE_CONFIG_CHANGE_MSG,
+ .flags =3D VHOST_USER_VERSION,
+ .size =3D 0,
+ };
+
+ ret =3D send_vhost_message(dev->slave_req_fd, &msg);
+ if (ret < 0) {
+ RTE_LOG(ERR, VHOST_CONFIG,
+ "Failed to send config change (%d)\n",
+ ret);
+ return ret;
+ }
+
+ return 0;
+}
+
+int
+rte_vhost_user_slave_config_change(int vid)
+{
+ struct virtio_net *dev;
+ dev =3D get_device(vid);
+ if (!dev)
+ return -ENODEV;
+ return vhost_user_slave_config_change(dev);
+}
+
static int vhost_user_slave_set_vring_host_notifier(struct virtio_net *dev=
,
int index, int fd,
uint64_t offset,
diff --git a/lib/librte_vhost/vhost_user.h b/lib/librte_vhost/vhost_user.h
index 6563f7315..5c1bb2138 100644
--- a/lib/librte_vhost/vhost_user.h
+++ b/lib/librte_vhost/vhost_user.h
@@ -62,6 +62,7 @@ typedef enum VhostUserRequest {
typedef enum VhostUserSlaveRequest {
VHOST_USER_SLAVE_NONE =3D 0,
VHOST_USER_SLAVE_IOTLB_MSG =3D 1,
+ VHOST_USER_SLAVE_CONFIG_CHANGE_MSG =3D 2,
VHOST_USER_SLAVE_VRING_HOST_NOTIFIER_MSG =3D 3,
VHOST_USER_SLAVE_MAX
} VhostUserSlaveRequest;
@@ -158,6 +159,7 @@ typedef struct VhostUserMsg {
/* vhost_user.c */
int vhost_user_msg_handler(int vid, int fd);
int vhost_user_iotlb_miss(struct virtio_net *dev, uint64_t iova, uint8_t p=
erm);
+int rte_vhost_user_slave_config_change(int vid);
=20
/* socket.c */
int read_fd_message(int sockfd, char *buf, int buflen, int *fds, int max_f=
ds,
--=20
2.11.0
--=20
The SmartX email address is only for business purpose. Any sent message=20
that is not related to the business is not authorized or permitted by=20
SmartX.
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