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Date: Thu, 22 Dec 2022 12:04:13 +0800
From: Jason Wang <jasowang@...hat.com>
To: Eugenio Perez Martin <eperezma@...hat.com>
Cc: mst@...hat.com, sgarzare@...hat.com,
virtualization@...ts.linux-foundation.org,
linux-kernel@...r.kernel.org
Subject: Re: [PATCH 4/4] vdpa_sim_net: vendor satistics
在 2022/12/21 14:33, Eugenio Perez Martin 写道:
> On Wed, Dec 21, 2022 at 7:17 AM Jason Wang <jasowang@...hat.com> wrote:
>> This patch adds support for basic vendor stats that include counters
>> for tx, rx and cvq.
>>
>> Signed-off-by: Jason Wang <jasowang@...hat.com>
>> ---
>> drivers/vdpa/vdpa_sim/vdpa_sim.c | 2 +
>> drivers/vdpa/vdpa_sim/vdpa_sim_net.c | 215 ++++++++++++++++++++++++++-
>> 2 files changed, 211 insertions(+), 6 deletions(-)
>>
>> diff --git a/drivers/vdpa/vdpa_sim/vdpa_sim.c b/drivers/vdpa/vdpa_sim/vdpa_sim.c
>> index 02e892f819e7..595d9d5a372f 100644
>> --- a/drivers/vdpa/vdpa_sim/vdpa_sim.c
>> +++ b/drivers/vdpa/vdpa_sim/vdpa_sim.c
>> @@ -755,8 +755,10 @@ static const struct vdpa_config_ops vdpasim_batch_config_ops = {
>> .set_vq_cb = vdpasim_set_vq_cb,
>> .set_vq_ready = vdpasim_set_vq_ready,
>> .get_vq_ready = vdpasim_get_vq_ready,
>> + .get_vendor_vq_stats = vdpasim_get_vq_stats,
>> .set_vq_state = vdpasim_set_vq_state,
>> .get_vq_state = vdpasim_get_vq_state,
>> + .get_vendor_vq_stats = vdpasim_get_vq_stats,
> The patch adds .get_vendor_vq_stats twice to vdpasim_batch_config_ops
> assignment.
Will fix.
>
>> .get_vq_align = vdpasim_get_vq_align,
>> .get_vq_group = vdpasim_get_vq_group,
>> .get_device_features = vdpasim_get_device_features,
>> diff --git a/drivers/vdpa/vdpa_sim/vdpa_sim_net.c b/drivers/vdpa/vdpa_sim/vdpa_sim_net.c
>> index 20cd5cdff919..3c05e932d90d 100644
>> --- a/drivers/vdpa/vdpa_sim/vdpa_sim_net.c
>> +++ b/drivers/vdpa/vdpa_sim/vdpa_sim_net.c
>> @@ -15,6 +15,7 @@
>> #include <linux/etherdevice.h>
>> #include <linux/vringh.h>
>> #include <linux/vdpa.h>
>> +#include <net/netlink.h>
>> #include <uapi/linux/virtio_net.h>
>> #include <uapi/linux/vdpa.h>
>>
>> @@ -36,6 +37,34 @@
>> #define VDPASIM_NET_AS_NUM 2
>> #define VDPASIM_NET_GROUP_NUM 2
>>
>> +struct vdpasim_dataq_stats {
>> + struct u64_stats_sync syncp;
>> + u64 pkts;
>> + u64 bytes;
>> + u64 drops;
>> + u64 errors;
>> + u64 overruns;
>> +};
>> +
>> +struct vdpasim_cq_stats {
>> + struct u64_stats_sync syncp;
>> + u64 requests;
>> + u64 successes;
>> + u64 errors;
>> +};
>> +
>> +struct vdpasim_net{
>> + struct vdpasim vdpasim;
>> + struct vdpasim_dataq_stats tx_stats;
>> + struct vdpasim_dataq_stats rx_stats;
>> + struct vdpasim_cq_stats cq_stats;
>> +};
>> +
>> +static struct vdpasim_net *sim_to_net(struct vdpasim *vdpasim)
>> +{
>> + return container_of(vdpasim, struct vdpasim_net, vdpasim);
>> +}
>> +
>> static void vdpasim_net_complete(struct vdpasim_virtqueue *vq, size_t len)
>> {
>> /* Make sure data is wrote before advancing index */
>> @@ -93,9 +122,11 @@ static virtio_net_ctrl_ack vdpasim_handle_ctrl_mac(struct vdpasim *vdpasim,
>> static void vdpasim_handle_cvq(struct vdpasim *vdpasim)
>> {
>> struct vdpasim_virtqueue *cvq = &vdpasim->vqs[2];
>> + struct vdpasim_net *net = sim_to_net(vdpasim);
>> virtio_net_ctrl_ack status = VIRTIO_NET_ERR;
>> struct virtio_net_ctrl_hdr ctrl;
>> size_t read, write;
>> + u64 requests = 0, errors = 0;
>> int err;
>>
>> if (!(vdpasim->features & (1ULL << VIRTIO_NET_F_CTRL_VQ)))
>> @@ -113,8 +144,12 @@ static void vdpasim_handle_cvq(struct vdpasim *vdpasim)
>>
>> read = vringh_iov_pull_iotlb(&cvq->vring, &cvq->in_iov, &ctrl,
>> sizeof(ctrl));
>> - if (read != sizeof(ctrl))
>> + if (read != sizeof(ctrl)) {
>> + ++errors;
>> break;
>> + }
>> +
>> + ++requests;
>>
>> switch (ctrl.class) {
>> case VIRTIO_NET_CTRL_MAC:
>> @@ -141,6 +176,12 @@ static void vdpasim_handle_cvq(struct vdpasim *vdpasim)
>> cvq->cb(cvq->private);
>> local_bh_enable();
>> }
>> +
>> + u64_stats_update_begin(&net->cq_stats.syncp);
>> + net->cq_stats.requests += requests;
>> + net->cq_stats.errors += errors;
>> + net->cq_stats.successes += requests;
> I'd say we should maintain here requests == errors + requests.
>
> Intuitively, I'd rename local variable requests to successes, and I'd apply:
> net->cq_stats.requests += successes + errors;
> net->cq_stats.errors += errors;
> net->cq_stats.successes += successes;
>
> Or am I missing something?
Exactly, let me fix.
Thanks
>
> Thanks!
>
>> + u64_stats_update_end(&net->cq_stats.syncp);
>> }
>>
>> static void vdpasim_net_work(struct work_struct *work)
>> @@ -148,8 +189,10 @@ static void vdpasim_net_work(struct work_struct *work)
>> struct vdpasim *vdpasim = container_of(work, struct vdpasim, work);
>> struct vdpasim_virtqueue *txq = &vdpasim->vqs[1];
>> struct vdpasim_virtqueue *rxq = &vdpasim->vqs[0];
>> + struct vdpasim_net *net = sim_to_net(vdpasim);
>> ssize_t read, write;
>> - int pkts = 0;
>> + u64 tx_pkts = 0, rx_pkts = 0, tx_bytes = 0, rx_bytes = 0;
>> + u64 rx_drops = 0, rx_overruns = 0, rx_errors = 0, tx_errors = 0;
>> int err;
>>
>> spin_lock(&vdpasim->lock);
>> @@ -168,14 +211,21 @@ static void vdpasim_net_work(struct work_struct *work)
>> while (true) {
>> err = vringh_getdesc_iotlb(&txq->vring, &txq->out_iov, NULL,
>> &txq->head, GFP_ATOMIC);
>> - if (err <= 0)
>> + if (err <= 0) {
>> + if (err)
>> + ++tx_errors;
>> break;
>> + }
>>
>> + ++tx_pkts;
>> read = vringh_iov_pull_iotlb(&txq->vring, &txq->out_iov,
>> vdpasim->buffer,
>> PAGE_SIZE);
>>
>> + tx_bytes += read;
>> +
>> if (!receive_filter(vdpasim, read)) {
>> + ++rx_drops;
>> vdpasim_net_complete(txq, 0);
>> continue;
>> }
>> @@ -183,19 +233,25 @@ static void vdpasim_net_work(struct work_struct *work)
>> err = vringh_getdesc_iotlb(&rxq->vring, NULL, &rxq->in_iov,
>> &rxq->head, GFP_ATOMIC);
>> if (err <= 0) {
>> + ++rx_overruns;
>> vdpasim_net_complete(txq, 0);
>> break;
>> }
>>
>> write = vringh_iov_push_iotlb(&rxq->vring, &rxq->in_iov,
>> vdpasim->buffer, read);
>> - if (write <= 0)
>> + if (write <= 0) {
>> + ++rx_errors;
>> break;
>> + }
>> +
>> + ++rx_pkts;
>> + rx_bytes += write;
>>
>> vdpasim_net_complete(txq, 0);
>> vdpasim_net_complete(rxq, write);
>>
>> - if (++pkts > 4) {
>> + if (tx_pkts > 4) {
>> schedule_work(&vdpasim->work);
>> goto out;
>> }
>> @@ -203,6 +259,145 @@ static void vdpasim_net_work(struct work_struct *work)
>>
>> out:
>> spin_unlock(&vdpasim->lock);
>> +
>> + u64_stats_update_begin(&net->tx_stats.syncp);
>> + net->tx_stats.pkts += tx_pkts;
>> + net->tx_stats.bytes += tx_bytes;
>> + net->tx_stats.errors += tx_errors;
>> + u64_stats_update_end(&net->tx_stats.syncp);
>> +
>> + u64_stats_update_begin(&net->rx_stats.syncp);
>> + net->rx_stats.pkts += rx_pkts;
>> + net->rx_stats.bytes += rx_bytes;
>> + net->rx_stats.drops += rx_drops;
>> + net->rx_stats.errors += rx_errors;
>> + net->rx_stats.overruns += rx_overruns;
>> + u64_stats_update_end(&net->rx_stats.syncp);
>> +}
>> +
>> +static int vdpasim_net_get_stats(struct vdpasim *vdpasim, u16 idx,
>> + struct sk_buff *msg,
>> + struct netlink_ext_ack *extack)
>> +{
>> + struct vdpasim_net *net = sim_to_net(vdpasim);
>> + u64 rx_pkts, rx_bytes, rx_errors, rx_overruns, rx_drops;
>> + u64 tx_pkts, tx_bytes, tx_errors, tx_drops;
>> + u64 cq_requests, cq_successes, cq_errors;
>> + unsigned int start;
>> + int err = -EMSGSIZE;
>> +
>> + switch(idx) {
>> + case 0:
>> + do {
>> + start = u64_stats_fetch_begin(&net->rx_stats.syncp);
>> + rx_pkts = net->rx_stats.pkts;
>> + rx_bytes = net->rx_stats.bytes;
>> + rx_errors = net->rx_stats.errors;
>> + rx_overruns = net->rx_stats.overruns;
>> + rx_drops = net->rx_stats.drops;
>> + } while (u64_stats_fetch_retry(&net->rx_stats.syncp, start));
>> +
>> + if (nla_put_string(msg, VDPA_ATTR_DEV_VENDOR_ATTR_NAME,
>> + "rx packets"))
>> + break;
>> + if (nla_put_u64_64bit(msg, VDPA_ATTR_DEV_VENDOR_ATTR_VALUE,
>> + rx_pkts, VDPA_ATTR_PAD))
>> + break;
>> + if (nla_put_string(msg, VDPA_ATTR_DEV_VENDOR_ATTR_NAME,
>> + "rx bytes"))
>> + break;
>> + if (nla_put_u64_64bit(msg, VDPA_ATTR_DEV_VENDOR_ATTR_VALUE,
>> + rx_bytes, VDPA_ATTR_PAD))
>> + break;
>> + if (nla_put_string(msg, VDPA_ATTR_DEV_VENDOR_ATTR_NAME,
>> + "rx errors"))
>> + break;
>> + if (nla_put_u64_64bit(msg, VDPA_ATTR_DEV_VENDOR_ATTR_VALUE,
>> + rx_errors, VDPA_ATTR_PAD))
>> + break;
>> + if (nla_put_string(msg, VDPA_ATTR_DEV_VENDOR_ATTR_NAME,
>> + "rx overrunss"))
>> + break;
>> + if (nla_put_u64_64bit(msg, VDPA_ATTR_DEV_VENDOR_ATTR_VALUE,
>> + rx_overruns, VDPA_ATTR_PAD))
>> + break;
>> + if (nla_put_string(msg, VDPA_ATTR_DEV_VENDOR_ATTR_NAME,
>> + "rx drops"))
>> + break;
>> + if (nla_put_u64_64bit(msg, VDPA_ATTR_DEV_VENDOR_ATTR_VALUE,
>> + rx_drops, VDPA_ATTR_PAD))
>> + break;
>> + err = 0;
>> + break;
>> + case 1:
>> + do {
>> + start = u64_stats_fetch_begin(&net->tx_stats.syncp);
>> + tx_pkts = net->tx_stats.pkts;
>> + tx_bytes = net->tx_stats.bytes;
>> + tx_errors = net->tx_stats.errors;
>> + tx_drops = net->tx_stats.drops;
>> + } while (u64_stats_fetch_retry(&net->tx_stats.syncp, start));
>> +
>> + if (nla_put_string(msg, VDPA_ATTR_DEV_VENDOR_ATTR_NAME,
>> + "tx packets"))
>> + break;
>> + if (nla_put_u64_64bit(msg, VDPA_ATTR_DEV_VENDOR_ATTR_VALUE,
>> + tx_pkts, VDPA_ATTR_PAD))
>> + break;
>> + if (nla_put_string(msg, VDPA_ATTR_DEV_VENDOR_ATTR_NAME,
>> + "tx bytes"))
>> + break;
>> + if (nla_put_u64_64bit(msg, VDPA_ATTR_DEV_VENDOR_ATTR_VALUE,
>> + tx_bytes, VDPA_ATTR_PAD))
>> + break;
>> + if (nla_put_string(msg, VDPA_ATTR_DEV_VENDOR_ATTR_NAME,
>> + "tx errors"))
>> + break;
>> + if (nla_put_u64_64bit(msg, VDPA_ATTR_DEV_VENDOR_ATTR_VALUE,
>> + tx_errors, VDPA_ATTR_PAD))
>> + break;
>> + if (nla_put_string(msg, VDPA_ATTR_DEV_VENDOR_ATTR_NAME,
>> + "tx drops"))
>> + break;
>> + if (nla_put_u64_64bit(msg, VDPA_ATTR_DEV_VENDOR_ATTR_VALUE,
>> + tx_drops, VDPA_ATTR_PAD))
>> + break;
>> + err = 0;
>> + break;
>> + case 2:
>> + do {
>> + start = u64_stats_fetch_begin(&net->cq_stats.syncp);
>> + cq_requests = net->cq_stats.requests;
>> + cq_successes = net->cq_stats.successes;
>> + cq_errors = net->cq_stats.errors;
>> + } while (u64_stats_fetch_retry(&net->cq_stats.syncp, start));
>> +
>> + if (nla_put_string(msg, VDPA_ATTR_DEV_VENDOR_ATTR_NAME,
>> + "cvq requests"))
>> + break;
>> + if (nla_put_u64_64bit(msg, VDPA_ATTR_DEV_VENDOR_ATTR_VALUE,
>> + cq_requests, VDPA_ATTR_PAD))
>> + break;
>> + if (nla_put_string(msg, VDPA_ATTR_DEV_VENDOR_ATTR_NAME,
>> + "cvq successes"))
>> + break;
>> + if (nla_put_u64_64bit(msg, VDPA_ATTR_DEV_VENDOR_ATTR_VALUE,
>> + cq_successes, VDPA_ATTR_PAD))
>> + break;
>> + if (nla_put_string(msg, VDPA_ATTR_DEV_VENDOR_ATTR_NAME,
>> + "cvq errors"))
>> + break;
>> + if (nla_put_u64_64bit(msg, VDPA_ATTR_DEV_VENDOR_ATTR_VALUE,
>> + cq_errors, VDPA_ATTR_PAD))
>> + break;
>> + err = 0;
>> + break;
>> + default:
>> + err = -EINVAL;
>> + break;
>> + }
>> +
>> + return err;
>> }
>>
>> static void vdpasim_net_get_config(struct vdpasim *vdpasim, void *config)
>> @@ -239,6 +434,7 @@ static int vdpasim_net_dev_add(struct vdpa_mgmt_dev *mdev, const char *name,
>> const struct vdpa_dev_set_config *config)
>> {
>> struct vdpasim_dev_attr dev_attr = {};
>> + struct vdpasim_net *net;
>> struct vdpasim *simdev;
>> int ret;
>>
>> @@ -249,10 +445,11 @@ static int vdpasim_net_dev_add(struct vdpa_mgmt_dev *mdev, const char *name,
>> dev_attr.nvqs = VDPASIM_NET_VQ_NUM;
>> dev_attr.ngroups = VDPASIM_NET_GROUP_NUM;
>> dev_attr.nas = VDPASIM_NET_AS_NUM;
>> - dev_attr.alloc_size = sizeof(struct vdpasim);
>> + dev_attr.alloc_size = sizeof(struct vdpasim_net);
>> dev_attr.config_size = sizeof(struct virtio_net_config);
>> dev_attr.get_config = vdpasim_net_get_config;
>> dev_attr.work_fn = vdpasim_net_work;
>> + dev_attr.get_stats = vdpasim_net_get_stats;
>> dev_attr.buffer_size = PAGE_SIZE;
>>
>> simdev = vdpasim_create(&dev_attr, config);
>> @@ -265,6 +462,12 @@ static int vdpasim_net_dev_add(struct vdpa_mgmt_dev *mdev, const char *name,
>> if (ret)
>> goto reg_err;
>>
>> + net = sim_to_net(simdev);
>> +
>> + u64_stats_init(&net->tx_stats.syncp);
>> + u64_stats_init(&net->rx_stats.syncp);
>> + u64_stats_init(&net->cq_stats.syncp);
>> +
>> return 0;
>>
>> reg_err:
>> --
>> 2.25.1
>>
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