[dpdk-dev] [PATCH 33/40] net/virtio: improve Virtio-user errors handling
Maxime Coquelin
maxime.coquelin at redhat.com
Fri Jan 15 12:09:09 CET 2021
On 1/7/21 3:26 AM, Xia, Chenbo wrote:
> Hi Maxime,
>
>> -----Original Message-----
>> From: Maxime Coquelin <maxime.coquelin at redhat.com>
>> Sent: Monday, December 21, 2020 5:14 AM
>> To: dev at dpdk.org; Xia, Chenbo <chenbo.xia at intel.com>; olivier.matz at 6wind.com;
>> amorenoz at redhat.com; david.marchand at redhat.com
>> Cc: Maxime Coquelin <maxime.coquelin at redhat.com>
>> Subject: [PATCH 33/40] net/virtio: improve Virtio-user errors handling
>>
>> This patch adds error logs and propagate errors reported
>
> s/propagate/propagates
Fixed.
>> by the backend. It also adds the device path in error logs
>> to make it easier to distinguish which device is facing the
>> issue.
>>
>> Signed-off-by: Maxime Coquelin <maxime.coquelin at redhat.com>
>> ---
>> .../net/virtio/virtio_user/virtio_user_dev.c | 155 ++++++++++++------
>> 1 file changed, 104 insertions(+), 51 deletions(-)
>>
>> diff --git a/drivers/net/virtio/virtio_user/virtio_user_dev.c
>> b/drivers/net/virtio/virtio_user/virtio_user_dev.c
>> index e1f016aa8c..b92b7f7aae 100644
>> --- a/drivers/net/virtio/virtio_user/virtio_user_dev.c
>> +++ b/drivers/net/virtio/virtio_user/virtio_user_dev.c
>> @@ -37,10 +37,15 @@ virtio_user_create_queue(struct virtio_user_dev *dev,
>> uint32_t queue_sel)
>> * pair.
>> */
>> struct vhost_vring_file file;
>> + int ret;
>>
>> file.index = queue_sel;
>> file.fd = dev->callfds[queue_sel];
>> - dev->ops->set_vring_call(dev, &file);
>> + ret = dev->ops->set_vring_call(dev, &file);
>> + if (ret < 0) {
>> + PMD_INIT_LOG(ERR, "(%s) Failed to create queue %u\n", dev->path,
>> queue_sel);
>> + return -1;
>> + }
>>
>> return 0;
>> }
>> @@ -48,6 +53,7 @@ virtio_user_create_queue(struct virtio_user_dev *dev,
>> uint32_t queue_sel)
>> static int
>> virtio_user_kick_queue(struct virtio_user_dev *dev, uint32_t queue_sel)
>> {
>> + int ret;
>> struct vhost_vring_file file;
>> struct vhost_vring_state state;
>> struct vring *vring = &dev->vrings[queue_sel];
>> @@ -73,15 +79,21 @@ virtio_user_kick_queue(struct virtio_user_dev *dev,
>> uint32_t queue_sel)
>>
>> state.index = queue_sel;
>> state.num = vring->num;
>> - dev->ops->set_vring_num(dev, &state);
>> + ret = dev->ops->set_vring_num(dev, &state);
>> + if (ret < 0)
>> + goto err;
>>
>> state.index = queue_sel;
>> state.num = 0; /* no reservation */
>> if (dev->features & (1ULL << VIRTIO_F_RING_PACKED))
>> state.num |= (1 << 15);
>> - dev->ops->set_vring_base(dev, &state);
>> + ret = dev->ops->set_vring_base(dev, &state);
>> + if (ret < 0)
>> + goto err;
>>
>> - dev->ops->set_vring_addr(dev, &addr);
>> + ret = dev->ops->set_vring_addr(dev, &addr);
>> + if (ret < 0)
>> + goto err;
>>
>> /* Of all per virtqueue MSGs, make sure VHOST_USER_SET_VRING_KICK comes
>> * lastly because vhost depends on this msg to judge if
>> @@ -89,9 +101,15 @@ virtio_user_kick_queue(struct virtio_user_dev *dev,
>> uint32_t queue_sel)
>> */
>> file.index = queue_sel;
>> file.fd = dev->kickfds[queue_sel];
>> - dev->ops->set_vring_kick(dev, &file);
>> + ret = dev->ops->set_vring_kick(dev, &file);
>> + if (ret < 0)
>> + goto err;
>>
>> return 0;
>> +err:
>> + PMD_INIT_LOG(ERR, "(%s) Failed to kick queue %u\n", dev->path,
>> queue_sel);
>> +
>> + return -1;
>> }
>>
>> static int
>> @@ -103,14 +121,14 @@ virtio_user_queue_setup(struct virtio_user_dev *dev,
>> for (i = 0; i < dev->max_queue_pairs; ++i) {
>> queue_sel = 2 * i + VTNET_SQ_RQ_QUEUE_IDX;
>> if (fn(dev, queue_sel) < 0) {
>> - PMD_DRV_LOG(INFO, "setup rx vq fails: %u", i);
>> + PMD_DRV_LOG(ERR, "(%s) setup rx vq fails: %u", dev->path, i);
>
> Maybe 'setup rx vq %u fails' is better?
>
>> return -1;
>> }
>> }
>> for (i = 0; i < dev->max_queue_pairs; ++i) {
>> queue_sel = 2 * i + VTNET_SQ_TQ_QUEUE_IDX;
>> if (fn(dev, queue_sel) < 0) {
>> - PMD_DRV_LOG(INFO, "setup tx vq fails: %u", i);
>> + PMD_DRV_LOG(INFO, "(%s) setup tx vq fails: %u", dev->path,
>> i);
>
> Maybe 'setup tx vq %u fails' is better?
Fixes both to "setup tx vq %u failed".
>> return -1;
>> }
>> }
>> @@ -144,7 +162,7 @@ virtio_user_dev_set_features(struct virtio_user_dev *dev)
>> ret = dev->ops->set_features(dev, features);
>> if (ret < 0)
>> goto error;
>> - PMD_DRV_LOG(INFO, "set features: %" PRIx64, features);
>> + PMD_DRV_LOG(INFO, "(%s) set features: %" PRIx64, dev->path, features);
>
> Add '0x' before '%" PRIx64'?
>
>> error:
>> pthread_mutex_unlock(&dev->mutex);
>>
>> @@ -172,9 +190,10 @@ virtio_user_start_device(struct virtio_user_dev *dev)
>> rte_mcfg_mem_read_lock();
>> pthread_mutex_lock(&dev->mutex);
>>
>> + /* Vhost-user client not connected yet, will start later */
>> if (dev->backend_type == VIRTIO_USER_BACKEND_VHOST_USER &&
>> dev->vhostfd < 0)
>> - goto error;
>> + goto out;
>>
>> /* Step 2: share memory regions */
>> ret = dev->ops->set_memory_table(dev);
>> @@ -182,15 +201,19 @@ virtio_user_start_device(struct virtio_user_dev *dev)
>> goto error;
>>
>> /* Step 3: kick queues */
>> - if (virtio_user_queue_setup(dev, virtio_user_kick_queue) < 0)
>> + ret = virtio_user_queue_setup(dev, virtio_user_kick_queue);
>> + if (ret < 0)
>> goto error;
>>
>> /* Step 4: enable queues
>> * we enable the 1st queue pair by default.
>> */
>> - dev->ops->enable_qp(dev, 0, 1);
>> + ret = dev->ops->enable_qp(dev, 0, 1);
>> + if (ret < 0)
>> + goto error;
>>
>> dev->started = true;
>> +out:
>> pthread_mutex_unlock(&dev->mutex);
>> rte_mcfg_mem_read_unlock();
>>
>> @@ -198,6 +221,9 @@ virtio_user_start_device(struct virtio_user_dev *dev)
>> error:
>> pthread_mutex_unlock(&dev->mutex);
>> rte_mcfg_mem_read_unlock();
>> +
>> + PMD_INIT_LOG(ERR, "(%s) Failed to start device\n", dev->path);
>> +
>> /* TODO: free resource here or caller to check */
>> return -1;
>> }
>> @@ -206,31 +232,40 @@ int virtio_user_stop_device(struct virtio_user_dev *dev)
>> {
>> struct vhost_vring_state state;
>> uint32_t i;
>> - int error = 0;
>> + int ret;
>>
>> pthread_mutex_lock(&dev->mutex);
>> if (!dev->started)
>> goto out;
>>
>> - for (i = 0; i < dev->max_queue_pairs; ++i)
>> - dev->ops->enable_qp(dev, i, 0);
>> + for (i = 0; i < dev->max_queue_pairs; ++i) {
>> + ret = dev->ops->enable_qp(dev, i, 0);
>> + if (ret < 0)
>> + goto err;
>> + }
>>
>> /* Stop the backend. */
>> for (i = 0; i < dev->max_queue_pairs * 2; ++i) {
>> state.index = i;
>> - if (dev->ops->get_vring_base(dev, &state) < 0) {
>> - PMD_DRV_LOG(ERR, "get_vring_base failed, index=%u",
>> - i);
>> - error = -1;
>> - goto out;
>> + ret = dev->ops->get_vring_base(dev, &state);
>> + if (ret < 0) {
>> + PMD_DRV_LOG(ERR, "(%s) get_vring_base failed, index=%u",
>> dev->path, i);
>> + goto err;
>> }
>> }
>>
>> dev->started = false;
>> +
>> out:
>> pthread_mutex_unlock(&dev->mutex);
>>
>> - return error;
>> + return 0;
>> +err:
>> + pthread_mutex_unlock(&dev->mutex);
>> +
>> + PMD_INIT_LOG(ERR, "(%s) Failed to stop device\n", dev->path);
>> +
>> + return -1;
>> }
>>
>> static inline void
>> @@ -270,12 +305,12 @@ virtio_user_dev_init_notify(struct virtio_user_dev *dev)
>> */
>> callfd = eventfd(0, EFD_CLOEXEC | EFD_NONBLOCK);
>> if (callfd < 0) {
>> - PMD_DRV_LOG(ERR, "callfd error, %s", strerror(errno));
>> + PMD_DRV_LOG(ERR, "(%s) callfd error, %s", dev->path,
>> strerror(errno));
>> break;
>> }
>> kickfd = eventfd(0, EFD_CLOEXEC | EFD_NONBLOCK);
>> if (kickfd < 0) {
>> - PMD_DRV_LOG(ERR, "kickfd error, %s", strerror(errno));
>> + PMD_DRV_LOG(ERR, "(%s) kickfd error, %s", dev->path,
>> strerror(errno));
>> break;
>> }
>> dev->callfds[i] = callfd;
>> @@ -303,7 +338,7 @@ virtio_user_fill_intr_handle(struct virtio_user_dev *dev)
>> if (!eth_dev->intr_handle) {
>> eth_dev->intr_handle = malloc(sizeof(*eth_dev->intr_handle));
>> if (!eth_dev->intr_handle) {
>> - PMD_DRV_LOG(ERR, "fail to allocate intr_handle");
>> + PMD_DRV_LOG(ERR, "(%s) fail to allocate intr_handle", dev-
>>> path);
>
> s/fail/failed ?
Indeed.
Thanks,
Maxime
> Thanks,
> Chenbo
>
>> return -1;
>> }
>> memset(eth_dev->intr_handle, 0, sizeof(*eth_dev->intr_handle));
>> @@ -334,6 +369,7 @@ virtio_user_mem_event_cb(enum rte_mem_event type
>> __rte_unused,
>> struct virtio_user_dev *dev = arg;
>> struct rte_memseg_list *msl;
>> uint16_t i;
>> + int ret = 0;
>>
>> /* ignore externally allocated memory */
>> msl = rte_mem_virt2memseg_list(addr);
>> @@ -346,18 +382,29 @@ virtio_user_mem_event_cb(enum rte_mem_event type
>> __rte_unused,
>> goto exit;
>>
>> /* Step 1: pause the active queues */
>> - for (i = 0; i < dev->queue_pairs; i++)
>> - dev->ops->enable_qp(dev, i, 0);
>> + for (i = 0; i < dev->queue_pairs; i++) {
>> + ret = dev->ops->enable_qp(dev, i, 0);
>> + if (ret < 0)
>> + goto exit;
>> + }
>>
>> /* Step 2: update memory regions */
>> - dev->ops->set_memory_table(dev);
>> + ret = dev->ops->set_memory_table(dev);
>> + if (ret < 0)
>> + goto exit;
>>
>> /* Step 3: resume the active queues */
>> - for (i = 0; i < dev->queue_pairs; i++)
>> - dev->ops->enable_qp(dev, i, 1);
>> + for (i = 0; i < dev->queue_pairs; i++) {
>> + ret = dev->ops->enable_qp(dev, i, 1);
>> + if (ret < 0)
>> + goto exit;
>> + }
>>
>> exit:
>> pthread_mutex_unlock(&dev->mutex);
>> +
>> + if (ret < 0)
>> + PMD_DRV_LOG(ERR, "(%s) Failed to update memory table\n", dev-
>>> path);
>> }
>>
>> static int
>> @@ -387,7 +434,7 @@ virtio_user_dev_setup(struct virtio_user_dev *dev)
>> dev->tapfds = malloc(dev->max_queue_pairs *
>> sizeof(int));
>> if (!dev->vhostfds || !dev->tapfds) {
>> - PMD_INIT_LOG(ERR, "Failed to malloc");
>> + PMD_INIT_LOG(ERR, "(%s) Failed to allocate FDs", dev-
>>> path);
>> return -1;
>> }
>>
>> @@ -399,19 +446,25 @@ virtio_user_dev_setup(struct virtio_user_dev *dev)
>> VIRTIO_USER_BACKEND_VHOST_VDPA) {
>> dev->ops = &virtio_ops_vdpa;
>> } else {
>> - PMD_DRV_LOG(ERR, "Unknown backend type");
>> + PMD_DRV_LOG(ERR, "(%s) Unknown backend type", dev->path);
>> return -1;
>> }
>> }
>>
>> - if (dev->ops->setup(dev) < 0)
>> + if (dev->ops->setup(dev) < 0) {
>> + PMD_INIT_LOG(ERR, "(%s) Failed to setup backend\n", dev->path);
>> return -1;
>> + }
>>
>> - if (virtio_user_dev_init_notify(dev) < 0)
>> + if (virtio_user_dev_init_notify(dev) < 0) {
>> + PMD_INIT_LOG(ERR, "(%s) Failed to init notifiers\n", dev->path);
>> return -1;
>> + }
>>
>> - if (virtio_user_fill_intr_handle(dev) < 0)
>> + if (virtio_user_fill_intr_handle(dev) < 0) {
>> + PMD_INIT_LOG(ERR, "(%s) Failed to init interrupt handler\n", dev-
>>> path);
>> return -1;
>> + }
>>
>> return 0;
>> }
>> @@ -472,7 +525,7 @@ virtio_user_dev_init(struct virtio_user_dev *dev, char
>> *path, int queues,
>> }
>>
>> if (virtio_user_dev_setup(dev) < 0) {
>> - PMD_INIT_LOG(ERR, "backend set up fails");
>> + PMD_INIT_LOG(ERR, "(%s) backend set up fails", dev->path);
>> return -1;
>> }
>>
>> @@ -482,26 +535,29 @@ virtio_user_dev_init(struct virtio_user_dev *dev, char
>> *path, int queues,
>>
>> if (!dev->is_server) {
>> if (dev->ops->set_owner(dev) < 0) {
>> - PMD_INIT_LOG(ERR, "set_owner fails: %s",
>> - strerror(errno));
>> + PMD_INIT_LOG(ERR, "(%s) Failed to set backend owner", dev-
>>> path);
>> return -1;
>> }
>>
>> if (dev->ops->get_features(dev, &dev->device_features) < 0) {
>> - PMD_INIT_LOG(ERR, "get_features failed: %s",
>> - strerror(errno));
>> + PMD_INIT_LOG(ERR, "(%s) Failed to get backend features",
>> dev->path);
>> return -1;
>> }
>>
>> -
>> if (dev->device_features & (1ULL <<
>> VHOST_USER_F_PROTOCOL_FEATURES)) {
>> - if (dev->ops->get_protocol_features(dev, &protocol_features))
>> + if (dev->ops->get_protocol_features(dev, &protocol_features))
>> {
>> + PMD_INIT_LOG(ERR, "(%s) Failed to get backend protocol
>> features",
>> + dev->path);
>> return -1;
>> + }
>>
>> dev->protocol_features &= protocol_features;
>>
>> - if (dev->ops->set_protocol_features(dev, dev-
>>> protocol_features))
>> + if (dev->ops->set_protocol_features(dev, dev-
>>> protocol_features)) {
>> + PMD_INIT_LOG(ERR, "(%s) Failed to set backend protocol
>> features",
>> + dev->path);
>> return -1;
>> + }
>>
>> if (!(dev->protocol_features & (1ULL <<
>> VHOST_USER_PROTOCOL_F_MQ)))
>> dev->unsupported_features |= (1ull << VIRTIO_NET_F_MQ);
>> @@ -568,8 +624,8 @@ virtio_user_dev_init(struct virtio_user_dev *dev, char
>> *path, int queues,
>> if (rte_mem_event_callback_register(VIRTIO_USER_MEM_EVENT_CLB_NAME,
>> virtio_user_mem_event_cb, dev)) {
>> if (rte_errno != ENOTSUP) {
>> - PMD_INIT_LOG(ERR, "Failed to register mem event"
>> - " callback\n");
>> + PMD_INIT_LOG(ERR, "(%s) Failed to register mem event
>> callback\n",
>> + dev->path);
>> return -1;
>> }
>> }
>> @@ -622,8 +678,8 @@ virtio_user_handle_mq(struct virtio_user_dev *dev,
>> uint16_t q_pairs)
>> uint8_t ret = 0;
>>
>> if (q_pairs > dev->max_queue_pairs) {
>> - PMD_INIT_LOG(ERR, "multi-q config %u, but only %u supported",
>> - q_pairs, dev->max_queue_pairs);
>> + PMD_INIT_LOG(ERR, "(%s) multi-q config %u, but only %u supported",
>> + dev->path, q_pairs, dev->max_queue_pairs);
>> return -1;
>> }
>>
>> @@ -809,10 +865,8 @@ virtio_user_dev_set_status(struct virtio_user_dev *dev,
>> uint8_t status)
>> pthread_mutex_lock(&dev->mutex);
>> dev->status = status;
>> ret = dev->ops->set_status(dev, status);
>> - if (ret && ret != -ENOTSUP) {
>> - PMD_INIT_LOG(ERR, "Virtio-user set status failed (%d): %s", ret,
>> - strerror(errno));
>> - }
>> + if (ret && ret != -ENOTSUP)
>> + PMD_INIT_LOG(ERR, "(%s) Failed to set backend status\n", dev-
>>> path);
>>
>> pthread_mutex_unlock(&dev->mutex);
>> return ret;
>> @@ -846,8 +900,7 @@ virtio_user_dev_update_status(struct virtio_user_dev *dev)
>> !!(dev->status & VIRTIO_CONFIG_STATUS_DEV_NEED_RESET),
>> !!(dev->status & VIRTIO_CONFIG_STATUS_FAILED));
>> } else if (ret != -ENOTSUP) {
>> - PMD_INIT_LOG(ERR, "Virtio-user get status failed (%d): %s", ret,
>> - strerror(errno));
>> + PMD_INIT_LOG(ERR, "(%s) Failed to get backend status\n", dev-
>>> path);
>> }
>>
>> pthread_mutex_unlock(&dev->mutex);
>> --
>> 2.29.2
>
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