As the spec https://github.com/oasis-tcs/virtio-spec/commit/42f389989823039724f95bbbd243291ab0064f82 make virtio-net support getting the stats from the device by ethtool -S <eth0>. NIC statistics: rx0_packets: 582951 rx0_bytes: 155307077 rx0_drops: 0 rx0_xdp_packets: 0 rx0_xdp_tx: 0 rx0_xdp_redirects: 0 rx0_xdp_drops: 0 rx0_kicks: 17007 rx0_hw_packets: 2179409 rx0_hw_bytes: 510015040 rx0_hw_notifications: 0 rx0_hw_interrupts: 0 rx0_hw_needs_csum: 2179409 rx0_hw_ratelimit_bytes: 0 tx0_packets: 15361 tx0_bytes: 1918970 tx0_xdp_tx: 0 tx0_xdp_tx_drops: 0 tx0_kicks: 15361 tx0_timeouts: 0 tx0_hw_packets: 32272 tx0_hw_bytes: 4311698 tx0_hw_notifications: 0 tx0_hw_interrupts: 0 tx0_hw_ratelimit_bytes: 0 The follow stats are hidden, there are exported by the queue stat API in the subsequent comment. VIRTNET_STATS_DESC_RX(basic, drops) VIRTNET_STATS_DESC_RX(basic, drop_overruns), VIRTNET_STATS_DESC_TX(basic, drops), VIRTNET_STATS_DESC_TX(basic, drop_malformed), VIRTNET_STATS_DESC_RX(csum, csum_valid), VIRTNET_STATS_DESC_RX(csum, csum_none), VIRTNET_STATS_DESC_RX(csum, csum_bad), VIRTNET_STATS_DESC_TX(csum, needs_csum), VIRTNET_STATS_DESC_TX(csum, csum_none), VIRTNET_STATS_DESC_RX(gso, gso_packets), VIRTNET_STATS_DESC_RX(gso, gso_bytes), VIRTNET_STATS_DESC_RX(gso, gso_packets_coalesced), VIRTNET_STATS_DESC_RX(gso, gso_bytes_coalesced), VIRTNET_STATS_DESC_TX(gso, gso_packets), VIRTNET_STATS_DESC_TX(gso, gso_bytes), VIRTNET_STATS_DESC_TX(gso, gso_segments), VIRTNET_STATS_DESC_TX(gso, gso_segments_bytes), VIRTNET_STATS_DESC_RX(speed, ratelimit_packets), VIRTNET_STATS_DESC_TX(speed, ratelimit_packets), Signed-off-by: Xuan Zhuo <xuanzhuo@xxxxxxxxxxxxxxxxx> Acked-by: Jason Wang <jasowang@xxxxxxxxxx> --- drivers/net/virtio_net.c | 476 ++++++++++++++++++++++++++++++++++++++- 1 file changed, 472 insertions(+), 4 deletions(-) diff --git a/drivers/net/virtio_net.c b/drivers/net/virtio_net.c index 8aa03625ab6c..08639902f94b 100644 --- a/drivers/net/virtio_net.c +++ b/drivers/net/virtio_net.c @@ -133,6 +133,57 @@ static const struct virtnet_stat_desc virtnet_rq_stats_desc[] = { #define VIRTNET_SQ_STATS_LEN ARRAY_SIZE(virtnet_sq_stats_desc) #define VIRTNET_RQ_STATS_LEN ARRAY_SIZE(virtnet_rq_stats_desc) +#define VIRTNET_STATS_DESC_CQ(name) \ + {#name, offsetof(struct virtio_net_stats_cvq, name)} + +#define VIRTNET_STATS_DESC_RX(class, name) \ + {#name, offsetof(struct virtio_net_stats_rx_ ## class, rx_ ## name)} + +#define VIRTNET_STATS_DESC_TX(class, name) \ + {#name, offsetof(struct virtio_net_stats_tx_ ## class, tx_ ## name)} + +static const struct virtnet_stat_desc virtnet_stats_cvq_desc[] = { + VIRTNET_STATS_DESC_CQ(command_num), + VIRTNET_STATS_DESC_CQ(ok_num), +}; + +static const struct virtnet_stat_desc virtnet_stats_rx_basic_desc[] = { + VIRTNET_STATS_DESC_RX(basic, packets), + VIRTNET_STATS_DESC_RX(basic, bytes), + + VIRTNET_STATS_DESC_RX(basic, notifications), + VIRTNET_STATS_DESC_RX(basic, interrupts), +}; + +static const struct virtnet_stat_desc virtnet_stats_tx_basic_desc[] = { + VIRTNET_STATS_DESC_TX(basic, packets), + VIRTNET_STATS_DESC_TX(basic, bytes), + + VIRTNET_STATS_DESC_TX(basic, notifications), + VIRTNET_STATS_DESC_TX(basic, interrupts), +}; + +static const struct virtnet_stat_desc virtnet_stats_rx_csum_desc[] = { + VIRTNET_STATS_DESC_RX(csum, needs_csum), +}; + +static const struct virtnet_stat_desc virtnet_stats_tx_gso_desc[] = { + VIRTNET_STATS_DESC_TX(gso, gso_packets_noseg), + VIRTNET_STATS_DESC_TX(gso, gso_bytes_noseg), +}; + +static const struct virtnet_stat_desc virtnet_stats_rx_speed_desc[] = { + VIRTNET_STATS_DESC_RX(speed, ratelimit_bytes), +}; + +static const struct virtnet_stat_desc virtnet_stats_tx_speed_desc[] = { + VIRTNET_STATS_DESC_TX(speed, ratelimit_bytes), +}; + +#define VIRTNET_Q_TYPE_RX 0 +#define VIRTNET_Q_TYPE_TX 1 +#define VIRTNET_Q_TYPE_CQ 2 + struct virtnet_interrupt_coalesce { u32 max_packets; u32 max_usecs; @@ -249,6 +300,7 @@ struct control_buf { struct virtio_net_ctrl_coal_tx coal_tx; struct virtio_net_ctrl_coal_rx coal_rx; struct virtio_net_ctrl_coal_vq coal_vq; + struct virtio_net_stats_capabilities stats_cap; }; struct virtnet_info { @@ -340,6 +392,8 @@ struct virtnet_info { /* failover when STANDBY feature enabled */ struct failover *failover; + + u64 device_stats_cap; }; struct padded_vnet_hdr { @@ -425,6 +479,17 @@ static int rxq2vq(int rxq) return rxq * 2; } +static int vq_type(struct virtnet_info *vi, int qid) +{ + if (qid == vi->max_queue_pairs * 2) + return VIRTNET_Q_TYPE_CQ; + + if (qid % 2) + return VIRTNET_Q_TYPE_TX; + + return VIRTNET_Q_TYPE_RX; +} + static inline struct virtio_net_common_hdr * skb_vnet_common_hdr(struct sk_buff *skb) { @@ -3307,6 +3372,369 @@ static int virtnet_set_channels(struct net_device *dev, return err; } +static void virtnet_stats_sprintf(u8 **p, const char *fmt, const char *noq_fmt, + int num, int qid, const struct virtnet_stat_desc *desc) +{ + int i; + + if (qid < 0) { + for (i = 0; i < num; ++i) + ethtool_sprintf(p, noq_fmt, desc[i].desc); + } else { + for (i = 0; i < num; ++i) + ethtool_sprintf(p, fmt, qid, desc[i].desc); + } +} + +static void virtnet_get_hw_stats_string(struct virtnet_info *vi, int type, int qid, u8 **data) +{ + const struct virtnet_stat_desc *desc; + const char *fmt, *noq_fmt; + u8 *p = *data; + u32 num = 0; + + if (!virtio_has_feature(vi->vdev, VIRTIO_NET_F_DEVICE_STATS)) + return; + + if (type == VIRTNET_Q_TYPE_CQ) { + noq_fmt = "cq_hw_%s"; + + if (vi->device_stats_cap & VIRTIO_NET_STATS_TYPE_CVQ) { + desc = &virtnet_stats_cvq_desc[0]; + num = ARRAY_SIZE(virtnet_stats_cvq_desc); + + virtnet_stats_sprintf(&p, NULL, noq_fmt, num, -1, desc); + } + } + + if (type == VIRTNET_Q_TYPE_RX) { + fmt = "rx%u_hw_%s"; + + if (vi->device_stats_cap & VIRTIO_NET_STATS_TYPE_RX_BASIC) { + desc = &virtnet_stats_rx_basic_desc[0]; + num = ARRAY_SIZE(virtnet_stats_rx_basic_desc); + + virtnet_stats_sprintf(&p, fmt, NULL, num, qid, desc); + } + + if (vi->device_stats_cap & VIRTIO_NET_STATS_TYPE_RX_CSUM) { + desc = &virtnet_stats_rx_csum_desc[0]; + num = ARRAY_SIZE(virtnet_stats_rx_csum_desc); + + virtnet_stats_sprintf(&p, fmt, NULL, num, qid, desc); + } + + if (vi->device_stats_cap & VIRTIO_NET_STATS_TYPE_RX_SPEED) { + desc = &virtnet_stats_rx_speed_desc[0]; + num = ARRAY_SIZE(virtnet_stats_rx_speed_desc); + + virtnet_stats_sprintf(&p, fmt, NULL, num, qid, desc); + } + } + + if (type == VIRTNET_Q_TYPE_TX) { + fmt = "tx%u_hw_%s"; + + if (vi->device_stats_cap & VIRTIO_NET_STATS_TYPE_TX_BASIC) { + desc = &virtnet_stats_tx_basic_desc[0]; + num = ARRAY_SIZE(virtnet_stats_tx_basic_desc); + + virtnet_stats_sprintf(&p, fmt, NULL, num, qid, desc); + } + + if (vi->device_stats_cap & VIRTIO_NET_STATS_TYPE_TX_GSO) { + desc = &virtnet_stats_tx_gso_desc[0]; + num = ARRAY_SIZE(virtnet_stats_tx_gso_desc); + + virtnet_stats_sprintf(&p, fmt, NULL, num, qid, desc); + } + + if (vi->device_stats_cap & VIRTIO_NET_STATS_TYPE_TX_SPEED) { + desc = &virtnet_stats_tx_speed_desc[0]; + num = ARRAY_SIZE(virtnet_stats_tx_speed_desc); + + virtnet_stats_sprintf(&p, fmt, NULL, num, qid, desc); + } + } + + *data = p; +} + +struct virtnet_stats_ctx { + /* Used to calculate the offset inside the output buffer. */ + u32 desc_num[3]; + + /* The actual supported stat types. */ + u32 bitmap[3]; + + /* Used to calculate the reply buffer size. */ + u32 size[3]; + + /* Record the output buffer. */ + u64 *data; +}; + +static void virtnet_stats_ctx_init(struct virtnet_info *vi, + struct virtnet_stats_ctx *ctx, + u64 *data) +{ + u32 queue_type; + + ctx->data = data; + + if (vi->device_stats_cap & VIRTIO_NET_STATS_TYPE_CVQ) { + queue_type = VIRTNET_Q_TYPE_CQ; + + ctx->bitmap[queue_type] |= VIRTIO_NET_STATS_TYPE_CVQ; + ctx->desc_num[queue_type] += ARRAY_SIZE(virtnet_stats_cvq_desc); + ctx->size[queue_type] += sizeof(struct virtio_net_stats_cvq); + } + + queue_type = VIRTNET_Q_TYPE_RX; + + if (vi->device_stats_cap & VIRTIO_NET_STATS_TYPE_RX_BASIC) { + ctx->bitmap[queue_type] |= VIRTIO_NET_STATS_TYPE_RX_BASIC; + ctx->desc_num[queue_type] += ARRAY_SIZE(virtnet_stats_rx_basic_desc); + ctx->size[queue_type] += sizeof(struct virtio_net_stats_rx_basic); + } + + if (vi->device_stats_cap & VIRTIO_NET_STATS_TYPE_RX_CSUM) { + ctx->bitmap[queue_type] |= VIRTIO_NET_STATS_TYPE_RX_CSUM; + ctx->desc_num[queue_type] += ARRAY_SIZE(virtnet_stats_rx_csum_desc); + ctx->size[queue_type] += sizeof(struct virtio_net_stats_rx_csum); + } + + if (vi->device_stats_cap & VIRTIO_NET_STATS_TYPE_RX_SPEED) { + ctx->bitmap[queue_type] |= VIRTIO_NET_STATS_TYPE_RX_SPEED; + ctx->desc_num[queue_type] += ARRAY_SIZE(virtnet_stats_rx_speed_desc); + ctx->size[queue_type] += sizeof(struct virtio_net_stats_rx_speed); + } + + queue_type = VIRTNET_Q_TYPE_TX; + + if (vi->device_stats_cap & VIRTIO_NET_STATS_TYPE_TX_BASIC) { + ctx->bitmap[queue_type] |= VIRTIO_NET_STATS_TYPE_TX_BASIC; + ctx->desc_num[queue_type] += ARRAY_SIZE(virtnet_stats_tx_basic_desc); + ctx->size[queue_type] += sizeof(struct virtio_net_stats_tx_basic); + } + + if (vi->device_stats_cap & VIRTIO_NET_STATS_TYPE_TX_GSO) { + ctx->bitmap[queue_type] |= VIRTIO_NET_STATS_TYPE_TX_GSO; + ctx->desc_num[queue_type] += ARRAY_SIZE(virtnet_stats_tx_gso_desc); + ctx->size[queue_type] += sizeof(struct virtio_net_stats_tx_gso); + } + + if (vi->device_stats_cap & VIRTIO_NET_STATS_TYPE_TX_SPEED) { + ctx->bitmap[queue_type] |= VIRTIO_NET_STATS_TYPE_TX_SPEED; + ctx->desc_num[queue_type] += ARRAY_SIZE(virtnet_stats_tx_speed_desc); + ctx->size[queue_type] += sizeof(struct virtio_net_stats_tx_speed); + } +} + +/* virtnet_fill_stats - copy the stats to ethtool -S + * The stats source is the device. + * + * @vi: virtio net info + * @qid: the vq id + * @ctx: stats ctx (initiated by virtnet_stats_ctx_init()) + * @base: pointer to the device reply. + * @type: the type of the device reply + */ +static void virtnet_fill_stats(struct virtnet_info *vi, u32 qid, + struct virtnet_stats_ctx *ctx, + const u8 *base, u8 reply_type) +{ + u32 queue_type, num_rx, num_tx, num_cq; + const struct virtnet_stat_desc *desc; + u64 offset, bitmap; + const __le64 *v; + int i, num; + + num_rx = VIRTNET_RQ_STATS_LEN + ctx->desc_num[VIRTNET_Q_TYPE_RX]; + num_tx = VIRTNET_SQ_STATS_LEN + ctx->desc_num[VIRTNET_Q_TYPE_TX]; + num_cq = ctx->desc_num[VIRTNET_Q_TYPE_CQ]; + + queue_type = vq_type(vi, qid); + bitmap = ctx->bitmap[queue_type]; + offset = 0; + + if (queue_type == VIRTNET_Q_TYPE_TX) { + offset = num_cq + num_rx * vi->curr_queue_pairs + num_tx * (qid / 2); + offset += VIRTNET_SQ_STATS_LEN; + } else if (queue_type == VIRTNET_Q_TYPE_RX) { + offset = num_cq + num_rx * (qid / 2) + VIRTNET_RQ_STATS_LEN; + } + + if (bitmap & VIRTIO_NET_STATS_TYPE_CVQ) { + desc = &virtnet_stats_cvq_desc[0]; + num = ARRAY_SIZE(virtnet_stats_cvq_desc); + if (reply_type == VIRTIO_NET_STATS_TYPE_REPLY_CVQ) + goto found; + + offset += num; + } + + if (bitmap & VIRTIO_NET_STATS_TYPE_RX_BASIC) { + desc = &virtnet_stats_rx_basic_desc[0]; + num = ARRAY_SIZE(virtnet_stats_rx_basic_desc); + if (reply_type == VIRTIO_NET_STATS_TYPE_REPLY_RX_BASIC) + goto found; + + offset += num; + } + + if (bitmap & VIRTIO_NET_STATS_TYPE_RX_CSUM) { + desc = &virtnet_stats_rx_csum_desc[0]; + num = ARRAY_SIZE(virtnet_stats_rx_csum_desc); + if (reply_type == VIRTIO_NET_STATS_TYPE_REPLY_RX_CSUM) + goto found; + + offset += num; + } + + if (bitmap & VIRTIO_NET_STATS_TYPE_RX_SPEED) { + desc = &virtnet_stats_rx_speed_desc[0]; + num = ARRAY_SIZE(virtnet_stats_rx_speed_desc); + if (reply_type == VIRTIO_NET_STATS_TYPE_REPLY_RX_SPEED) + goto found; + + offset += num; + } + + if (bitmap & VIRTIO_NET_STATS_TYPE_TX_BASIC) { + desc = &virtnet_stats_tx_basic_desc[0]; + num = ARRAY_SIZE(virtnet_stats_tx_basic_desc); + if (reply_type == VIRTIO_NET_STATS_TYPE_REPLY_TX_BASIC) + goto found; + + offset += num; + } + + if (bitmap & VIRTIO_NET_STATS_TYPE_TX_GSO) { + desc = &virtnet_stats_tx_gso_desc[0]; + num = ARRAY_SIZE(virtnet_stats_tx_gso_desc); + if (reply_type == VIRTIO_NET_STATS_TYPE_REPLY_TX_GSO) + goto found; + + offset += num; + } + + if (bitmap & VIRTIO_NET_STATS_TYPE_TX_SPEED) { + desc = &virtnet_stats_tx_speed_desc[0]; + num = ARRAY_SIZE(virtnet_stats_tx_speed_desc); + if (reply_type == VIRTIO_NET_STATS_TYPE_REPLY_TX_SPEED) + goto found; + + offset += num; + } + + return; + +found: + for (i = 0; i < num; ++i) { + v = (const __le64 *)(base + desc[i].offset); + ctx->data[offset + i] = le64_to_cpu(*v); + } +} + +static int __virtnet_get_hw_stats(struct virtnet_info *vi, + struct virtnet_stats_ctx *ctx, + struct virtio_net_ctrl_queue_stats *req, + int req_size, void *reply, int res_size) +{ + struct virtio_net_stats_reply_hdr *hdr; + struct scatterlist sgs_in, sgs_out; + void *p; + u32 qid; + int ok; + + sg_init_one(&sgs_out, req, req_size); + sg_init_one(&sgs_in, reply, res_size); + + ok = virtnet_send_command_reply(vi, VIRTIO_NET_CTRL_STATS, + VIRTIO_NET_CTRL_STATS_GET, + &sgs_out, &sgs_in); + + if (!ok) + return ok; + + for (p = reply; p - reply < res_size; p += le16_to_cpu(hdr->size)) { + hdr = p; + qid = le16_to_cpu(hdr->vq_index); + virtnet_fill_stats(vi, qid, ctx, p, hdr->type); + } + + return 0; +} + +static void virtnet_make_stat_req(struct virtnet_info *vi, + struct virtnet_stats_ctx *ctx, + struct virtio_net_ctrl_queue_stats *req, + int qid, int *idx) +{ + int qtype = vq_type(vi, qid); + u64 bitmap = ctx->bitmap[qtype]; + + if (!bitmap) + return; + + req->stats[*idx].vq_index = cpu_to_le16(qid); + req->stats[*idx].types_bitmap[0] = cpu_to_le64(bitmap); + *idx += 1; +} + +static int virtnet_get_hw_stats(struct virtnet_info *vi, + struct virtnet_stats_ctx *ctx) +{ + struct virtio_net_ctrl_queue_stats *req; + int qnum, i, j, res_size, qtype, last_vq; + void *reply; + int ok; + + if (!virtio_has_feature(vi->vdev, VIRTIO_NET_F_DEVICE_STATS)) + return 0; + + last_vq = vi->curr_queue_pairs * 2 - 1; + + qnum = 0; + res_size = 0; + for (i = 0; i <= last_vq ; ++i) { + qtype = vq_type(vi, i); + if (ctx->bitmap[qtype]) { + ++qnum; + res_size += ctx->size[qtype]; + } + } + + if (ctx->bitmap[VIRTNET_Q_TYPE_CQ]) { + res_size += ctx->size[VIRTNET_Q_TYPE_CQ]; + qnum += 1; + } + + req = kcalloc(qnum, sizeof(*req), GFP_KERNEL); + if (!req) + return -ENOMEM; + + reply = kmalloc(res_size, GFP_KERNEL); + if (!reply) { + kfree(req); + return -ENOMEM; + } + + j = 0; + for (i = 0; i <= last_vq ; ++i) + virtnet_make_stat_req(vi, ctx, req, i, &j); + + virtnet_make_stat_req(vi, ctx, req, vi->max_queue_pairs * 2, &j); + + ok = __virtnet_get_hw_stats(vi, ctx, req, sizeof(*req) * j, reply, res_size); + + kfree(req); + kfree(reply); + + return ok; +} + static void virtnet_get_strings(struct net_device *dev, u32 stringset, u8 *data) { struct virtnet_info *vi = netdev_priv(dev); @@ -3315,16 +3743,22 @@ static void virtnet_get_strings(struct net_device *dev, u32 stringset, u8 *data) switch (stringset) { case ETH_SS_STATS: + virtnet_get_hw_stats_string(vi, VIRTNET_Q_TYPE_CQ, 0, &p); + for (i = 0; i < vi->curr_queue_pairs; i++) { for (j = 0; j < VIRTNET_RQ_STATS_LEN; j++) ethtool_sprintf(&p, "rx%u_%s", i, virtnet_rq_stats_desc[j].desc); + + virtnet_get_hw_stats_string(vi, VIRTNET_Q_TYPE_RX, i, &p); } for (i = 0; i < vi->curr_queue_pairs; i++) { for (j = 0; j < VIRTNET_SQ_STATS_LEN; j++) ethtool_sprintf(&p, "tx%u_%s", i, virtnet_sq_stats_desc[j].desc); + + virtnet_get_hw_stats_string(vi, VIRTNET_Q_TYPE_TX, i, &p); } break; } @@ -3333,11 +3767,17 @@ static void virtnet_get_strings(struct net_device *dev, u32 stringset, u8 *data) static int virtnet_get_sset_count(struct net_device *dev, int sset) { struct virtnet_info *vi = netdev_priv(dev); + struct virtnet_stats_ctx ctx = {0}; + u32 pair_count; switch (sset) { case ETH_SS_STATS: - return vi->curr_queue_pairs * (VIRTNET_RQ_STATS_LEN + - VIRTNET_SQ_STATS_LEN); + virtnet_stats_ctx_init(vi, &ctx, NULL); + + pair_count = VIRTNET_RQ_STATS_LEN + VIRTNET_SQ_STATS_LEN; + pair_count += ctx.desc_num[VIRTNET_Q_TYPE_RX] + ctx.desc_num[VIRTNET_Q_TYPE_TX]; + + return ctx.desc_num[VIRTNET_Q_TYPE_CQ] + vi->curr_queue_pairs * pair_count; default: return -EOPNOTSUPP; } @@ -3347,11 +3787,18 @@ static void virtnet_get_ethtool_stats(struct net_device *dev, struct ethtool_stats *stats, u64 *data) { struct virtnet_info *vi = netdev_priv(dev); - unsigned int idx = 0, start, i, j; + struct virtnet_stats_ctx ctx = {0}; + unsigned int idx, start, i, j; const u8 *stats_base; const u64_stats_t *p; size_t offset; + virtnet_stats_ctx_init(vi, &ctx, data); + if (virtnet_get_hw_stats(vi, &ctx)) + dev_warn(&vi->dev->dev, "Failed to get hw stats.\n"); + + idx = ctx.desc_num[VIRTNET_Q_TYPE_CQ]; + for (i = 0; i < vi->curr_queue_pairs; i++) { struct receive_queue *rq = &vi->rq[i]; @@ -3365,6 +3812,7 @@ static void virtnet_get_ethtool_stats(struct net_device *dev, } } while (u64_stats_fetch_retry(&rq->stats.syncp, start)); idx += VIRTNET_RQ_STATS_LEN; + idx += ctx.desc_num[VIRTNET_Q_TYPE_RX]; } for (i = 0; i < vi->curr_queue_pairs; i++) { @@ -3380,6 +3828,7 @@ static void virtnet_get_ethtool_stats(struct net_device *dev, } } while (u64_stats_fetch_retry(&sq->stats.syncp, start)); idx += VIRTNET_SQ_STATS_LEN; + idx += ctx.desc_num[VIRTNET_Q_TYPE_TX]; } } @@ -4946,6 +5395,25 @@ static int virtnet_probe(struct virtio_device *vdev) } } + if (virtio_has_feature(vi->vdev, VIRTIO_NET_F_DEVICE_STATS)) { + struct scatterlist sg; + __le64 v; + + sg_init_one(&sg, &vi->ctrl->stats_cap, sizeof(vi->ctrl->stats_cap)); + + if (!virtnet_send_command_reply(vi, VIRTIO_NET_CTRL_STATS, + VIRTIO_NET_CTRL_STATS_QUERY, + NULL, &sg)) { + pr_debug("virtio_net: fail to get stats capability\n"); + rtnl_unlock(); + err = -EINVAL; + goto free_unregister_netdev; + } + + v = vi->ctrl->stats_cap.supported_stats_types[0]; + vi->device_stats_cap = le64_to_cpu(v); + } + rtnl_unlock(); err = virtnet_cpu_notif_add(vi); @@ -5074,7 +5542,7 @@ static struct virtio_device_id id_table[] = { VIRTIO_NET_F_SPEED_DUPLEX, VIRTIO_NET_F_STANDBY, \ VIRTIO_NET_F_RSS, VIRTIO_NET_F_HASH_REPORT, VIRTIO_NET_F_NOTF_COAL, \ VIRTIO_NET_F_VQ_NOTF_COAL, \ - VIRTIO_NET_F_GUEST_HDRLEN + VIRTIO_NET_F_GUEST_HDRLEN, VIRTIO_NET_F_DEVICE_STATS static unsigned int features[] = { VIRTNET_FEATURES, -- 2.32.0.3.g01195cf9f
