[dpdk-dev,v3] net/virtio-user: fix multiple queues fail in server mode
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Commit Message
This patch fixes multiple queues failure when virtio-user works in
server mode.
This patch adds feature negotiation in the processing of virtio-user
connection and enables multiple-queue pairs.
Fixes: bd8f50a45d0f ("net/virtio-user: support server mode")
Cc: stable@dpdk.org
Signed-off-by: Zhiyong Yang <zhiyong.yang@intel.com>
---
Changes in V3:
1. virtio_user_handle_mq is redefined as extern instead of static.
2. add to call virtio_user_handle_mq in virtio_user_server_reconnect.
Changes in V2:
1. fix a comment typo.
2. add feature negotiation in the processing of reconnection.
drivers/net/virtio/virtio_user/vhost_user.c | 3 +++
drivers/net/virtio/virtio_user/virtio_user_dev.c | 18 ++++++++++------
drivers/net/virtio/virtio_user/virtio_user_dev.h | 1 +
drivers/net/virtio/virtio_user_ethdev.c | 27 ++++++++++++++++++++++++
4 files changed, 43 insertions(+), 6 deletions(-)
Comments
On Fri, May 11, 2018 at 10:12:47AM +0800, zhiyong.yang@intel.com wrote:
[...]
> @@ -447,11 +447,17 @@ virtio_user_handle_mq(struct virtio_user_dev *dev, uint16_t q_pairs)
> return -1;
> }
>
> - for (i = 0; i < q_pairs; ++i)
> - ret |= dev->ops->enable_qp(dev, i, 1);
> - for (i = q_pairs; i < dev->max_queue_pairs; ++i)
> - ret |= dev->ops->enable_qp(dev, i, 0);
> -
> + /* Server mode can't enable queue pairs if vhostfd is invalid,
> + * always return 0 in this case.
> + */
> + if (dev->vhostfd >= 0) {
There are two spaces between ')' and '{'.
> + for (i = 0; i < q_pairs; ++i)
> + ret |= dev->ops->enable_qp(dev, i, 1);
> + for (i = q_pairs; i < dev->max_queue_pairs; ++i)
> + ret |= dev->ops->enable_qp(dev, i, 0);
> + } else if (!dev->is_server) {
> + ret = ~0;
> + }
> dev->queue_pairs = q_pairs;
>
> return ret;
[...]
> @@ -37,6 +38,25 @@ virtio_user_server_reconnect(struct virtio_user_dev *dev)
> return -1;
>
> dev->vhostfd = connectfd;
> + if (dev->ops->send_request(dev, VHOST_USER_GET_FEATURES,
> + &dev->device_features) < 0) {
> + PMD_INIT_LOG(ERR, "get_features failed: %s",
> + strerror(errno));
> + return -1;
> + }
> +
> + features &= ~dev->device_features;
> + /* For following bits, vhost-user doesn't really need to know */
> + features &= ~(1ull << VIRTIO_NET_F_MAC);
> + features &= ~(1ull << VIRTIO_NET_F_CTRL_VLAN);
> + features &= ~(1ull << VIRTIO_NET_F_CTRL_MAC_ADDR);
> + features &= ~(1ull << VIRTIO_NET_F_STATUS);
> + if (features)
> + PMD_INIT_LOG(ERR, "WARNING: Some features 0x%" PRIx64 "are not supported by vhost-user!",
A space is missing before "are not ...". Should be: " are not ..."
Other than above small typos,
Reviewed-by: Tiwei Bie <tiwei.bie@intel.com>
> -----Original Message-----
> From: Bie, Tiwei
> Sent: Friday, May 11, 2018 10:50 AM
> To: Yang, Zhiyong <zhiyong.yang@intel.com>
> Cc: dev@dpdk.org; Yigit, Ferruh <ferruh.yigit@intel.com>;
> maxime.coquelin@redhat.com; stable@dpdk.org
> Subject: Re: [PATCH v3] net/virtio-user: fix multiple queues fail in server
> mode
>
> On Fri, May 11, 2018 at 10:12:47AM +0800, zhiyong.yang@intel.com wrote:
> [...]
> > @@ -447,11 +447,17 @@ virtio_user_handle_mq(struct virtio_user_dev
> *dev, uint16_t q_pairs)
> > return -1;
> > }
> >
> > - for (i = 0; i < q_pairs; ++i)
> > - ret |= dev->ops->enable_qp(dev, i, 1);
> > - for (i = q_pairs; i < dev->max_queue_pairs; ++i)
> > - ret |= dev->ops->enable_qp(dev, i, 0);
> > -
> > + /* Server mode can't enable queue pairs if vhostfd is invalid,
> > + * always return 0 in this case.
> > + */
> > + if (dev->vhostfd >= 0) {
>
> There are two spaces between ')' and '{'.
>
> > + for (i = 0; i < q_pairs; ++i)
> > + ret |= dev->ops->enable_qp(dev, i, 1);
> > + for (i = q_pairs; i < dev->max_queue_pairs; ++i)
> > + ret |= dev->ops->enable_qp(dev, i, 0);
> > + } else if (!dev->is_server) {
> > + ret = ~0;
> > + }
> > dev->queue_pairs = q_pairs;
> >
> > return ret;
> [...]
> > @@ -37,6 +38,25 @@ virtio_user_server_reconnect(struct virtio_user_dev
> *dev)
> > return -1;
> >
> > dev->vhostfd = connectfd;
> > + if (dev->ops->send_request(dev, VHOST_USER_GET_FEATURES,
> > + &dev->device_features) < 0) {
> > + PMD_INIT_LOG(ERR, "get_features failed: %s",
> > + strerror(errno));
> > + return -1;
> > + }
> > +
> > + features &= ~dev->device_features;
> > + /* For following bits, vhost-user doesn't really need to know */
> > + features &= ~(1ull << VIRTIO_NET_F_MAC);
> > + features &= ~(1ull << VIRTIO_NET_F_CTRL_VLAN);
> > + features &= ~(1ull << VIRTIO_NET_F_CTRL_MAC_ADDR);
> > + features &= ~(1ull << VIRTIO_NET_F_STATUS);
> > + if (features)
> > + PMD_INIT_LOG(ERR, "WARNING: Some features 0x%"
> PRIx64 "are not supported by vhost-user!",
>
> A space is missing before "are not ...". Should be: " are not ..."
>
>
> Other than above small typos,
>
> Reviewed-by: Tiwei Bie <tiwei.bie@intel.com>
Thanks Tiwei, will send a new version to fix the typoes.
Thanks
Zhiyong
@@ -263,6 +263,9 @@ vhost_user_sock(struct virtio_user_dev *dev,
PMD_DRV_LOG(INFO, "%s", vhost_msg_strings[req]);
+ if (dev->is_server && vhostfd < 0)
+ return -1;
+
msg.request = req;
msg.flags = VHOST_USER_VERSION;
msg.size = 0;
@@ -435,7 +435,7 @@ virtio_user_dev_uninit(struct virtio_user_dev *dev)
unlink(dev->path);
}
-static uint8_t
+uint8_t
virtio_user_handle_mq(struct virtio_user_dev *dev, uint16_t q_pairs)
{
uint16_t i;
@@ -447,11 +447,17 @@ virtio_user_handle_mq(struct virtio_user_dev *dev, uint16_t q_pairs)
return -1;
}
- for (i = 0; i < q_pairs; ++i)
- ret |= dev->ops->enable_qp(dev, i, 1);
- for (i = q_pairs; i < dev->max_queue_pairs; ++i)
- ret |= dev->ops->enable_qp(dev, i, 0);
-
+ /* Server mode can't enable queue pairs if vhostfd is invalid,
+ * always return 0 in this case.
+ */
+ if (dev->vhostfd >= 0) {
+ for (i = 0; i < q_pairs; ++i)
+ ret |= dev->ops->enable_qp(dev, i, 1);
+ for (i = q_pairs; i < dev->max_queue_pairs; ++i)
+ ret |= dev->ops->enable_qp(dev, i, 0);
+ } else if (!dev->is_server) {
+ ret = ~0;
+ }
dev->queue_pairs = q_pairs;
return ret;
@@ -48,4 +48,5 @@ int virtio_user_dev_init(struct virtio_user_dev *dev, char *path, int queues,
int cq, int queue_size, const char *mac, char **ifname);
void virtio_user_dev_uninit(struct virtio_user_dev *dev);
void virtio_user_handle_cq(struct virtio_user_dev *dev, uint16_t queue_idx);
+uint8_t virtio_user_handle_mq(struct virtio_user_dev *dev, uint16_t q_pairs);
#endif
@@ -30,6 +30,7 @@ virtio_user_server_reconnect(struct virtio_user_dev *dev)
int ret;
int flag;
int connectfd;
+ uint64_t features = dev->device_features;
struct rte_eth_dev *eth_dev = &rte_eth_devices[dev->port_id];
connectfd = accept(dev->listenfd, NULL, NULL);
@@ -37,6 +38,25 @@ virtio_user_server_reconnect(struct virtio_user_dev *dev)
return -1;
dev->vhostfd = connectfd;
+ if (dev->ops->send_request(dev, VHOST_USER_GET_FEATURES,
+ &dev->device_features) < 0) {
+ PMD_INIT_LOG(ERR, "get_features failed: %s",
+ strerror(errno));
+ return -1;
+ }
+
+ features &= ~dev->device_features;
+ /* For following bits, vhost-user doesn't really need to know */
+ features &= ~(1ull << VIRTIO_NET_F_MAC);
+ features &= ~(1ull << VIRTIO_NET_F_CTRL_VLAN);
+ features &= ~(1ull << VIRTIO_NET_F_CTRL_MAC_ADDR);
+ features &= ~(1ull << VIRTIO_NET_F_STATUS);
+ if (features)
+ PMD_INIT_LOG(ERR, "WARNING: Some features 0x%" PRIx64 "are not supported by vhost-user!",
+ features);
+
+ dev->features &= dev->device_features;
+
flag = fcntl(connectfd, F_GETFD);
fcntl(connectfd, F_SETFL, flag | O_NONBLOCK);
@@ -44,6 +64,13 @@ virtio_user_server_reconnect(struct virtio_user_dev *dev)
if (ret < 0)
return -1;
+ if (dev->queue_pairs > 1) {
+ ret = virtio_user_handle_mq(dev, dev->queue_pairs);
+ if (ret != 0) {
+ PMD_INIT_LOG(ERR, "Fails to enable multi-queue pairs!");
+ return -1;
+ }
+ }
if (eth_dev->data->dev_flags & RTE_ETH_DEV_INTR_LSC) {
if (rte_intr_disable(eth_dev->intr_handle) < 0) {
PMD_DRV_LOG(ERR, "interrupt disable failed");