diff options
Diffstat (limited to 'hw/virtio')
| -rw-r--r-- | hw/virtio/vhost-user.c | 170 |
1 files changed, 85 insertions, 85 deletions
diff --git a/hw/virtio/vhost-user.c b/hw/virtio/vhost-user.c index 23e9039922..3c14947589 100644 --- a/hw/virtio/vhost-user.c +++ b/hw/virtio/vhost-user.c @@ -1073,6 +1073,91 @@ static int vhost_user_set_vring_endian(struct vhost_dev *dev, return vhost_user_write(dev, &msg, NULL, 0); } +static int vhost_user_get_u64(struct vhost_dev *dev, int request, uint64_t *u64) +{ + int ret; + VhostUserMsg msg = { + .hdr.request = request, + .hdr.flags = VHOST_USER_VERSION, + }; + + if (vhost_user_per_device_request(request) && dev->vq_index != 0) { + return 0; + } + + ret = vhost_user_write(dev, &msg, NULL, 0); + if (ret < 0) { + return ret; + } + + ret = vhost_user_read(dev, &msg); + if (ret < 0) { + return ret; + } + + if (msg.hdr.request != request) { + error_report("Received unexpected msg type. Expected %d received %d", + request, msg.hdr.request); + return -EPROTO; + } + + if (msg.hdr.size != sizeof(msg.payload.u64)) { + error_report("Received bad msg size."); + return -EPROTO; + } + + *u64 = msg.payload.u64; + + return 0; +} + +static int vhost_user_get_features(struct vhost_dev *dev, uint64_t *features) +{ + if (vhost_user_get_u64(dev, VHOST_USER_GET_FEATURES, features) < 0) { + return -EPROTO; + } + + return 0; +} + +/* Note: "msg->hdr.flags" may be modified. */ +static int vhost_user_write_sync(struct vhost_dev *dev, VhostUserMsg *msg, + bool wait_for_reply) +{ + int ret; + + if (wait_for_reply) { + bool reply_supported = virtio_has_feature(dev->protocol_features, + VHOST_USER_PROTOCOL_F_REPLY_ACK); + if (reply_supported) { + msg->hdr.flags |= VHOST_USER_NEED_REPLY_MASK; + } + } + + ret = vhost_user_write(dev, msg, NULL, 0); + if (ret < 0) { + return ret; + } + + if (wait_for_reply) { + uint64_t dummy; + + if (msg->hdr.flags & VHOST_USER_NEED_REPLY_MASK) { + return process_message_reply(dev, msg); + } + + /* + * We need to wait for a reply but the backend does not + * support replies for the command we just sent. + * Send VHOST_USER_GET_FEATURES which makes all backends + * send a reply. + */ + return vhost_user_get_features(dev, &dummy); + } + + return 0; +} + static int vhost_set_vring(struct vhost_dev *dev, unsigned long int request, struct vhost_vring_state *ring) @@ -1245,91 +1330,6 @@ static int vhost_user_set_vring_err(struct vhost_dev *dev, return vhost_set_vring_file(dev, VHOST_USER_SET_VRING_ERR, file); } -static int vhost_user_get_u64(struct vhost_dev *dev, int request, uint64_t *u64) -{ - int ret; - VhostUserMsg msg = { - .hdr.request = request, - .hdr.flags = VHOST_USER_VERSION, - }; - - if (vhost_user_per_device_request(request) && dev->vq_index != 0) { - return 0; - } - - ret = vhost_user_write(dev, &msg, NULL, 0); - if (ret < 0) { - return ret; - } - - ret = vhost_user_read(dev, &msg); - if (ret < 0) { - return ret; - } - - if (msg.hdr.request != request) { - error_report("Received unexpected msg type. Expected %d received %d", - request, msg.hdr.request); - return -EPROTO; - } - - if (msg.hdr.size != sizeof(msg.payload.u64)) { - error_report("Received bad msg size."); - return -EPROTO; - } - - *u64 = msg.payload.u64; - - return 0; -} - -static int vhost_user_get_features(struct vhost_dev *dev, uint64_t *features) -{ - if (vhost_user_get_u64(dev, VHOST_USER_GET_FEATURES, features) < 0) { - return -EPROTO; - } - - return 0; -} - -/* Note: "msg->hdr.flags" may be modified. */ -static int vhost_user_write_sync(struct vhost_dev *dev, VhostUserMsg *msg, - bool wait_for_reply) -{ - int ret; - - if (wait_for_reply) { - bool reply_supported = virtio_has_feature(dev->protocol_features, - VHOST_USER_PROTOCOL_F_REPLY_ACK); - if (reply_supported) { - msg->hdr.flags |= VHOST_USER_NEED_REPLY_MASK; - } - } - - ret = vhost_user_write(dev, msg, NULL, 0); - if (ret < 0) { - return ret; - } - - if (wait_for_reply) { - uint64_t dummy; - - if (msg->hdr.flags & VHOST_USER_NEED_REPLY_MASK) { - return process_message_reply(dev, msg); - } - - /* - * We need to wait for a reply but the backend does not - * support replies for the command we just sent. - * Send VHOST_USER_GET_FEATURES which makes all backends - * send a reply. - */ - return vhost_user_get_features(dev, &dummy); - } - - return 0; -} - static int vhost_user_set_vring_addr(struct vhost_dev *dev, struct vhost_vring_addr *addr) { |