In the last commit, we use the stats map to manage the device stats.
Managing driver statistics separately can be inconvenient. To streamline
the process, I propose integrating driver stats into the existing stats
map. This integration will allow us to uniformly handle all statistics
through a single method, simplifying management and reducing complexity
in our codebase.
Signed-off-by: Xuan Zhuo <xuanzhuo@xxxxxxxxxxxxxxxxx>
---
drivers/net/virtio_net.c | 200 +++++++++++++++++++--------------------
1 file changed, 99 insertions(+), 101 deletions(-)
diff --git a/drivers/net/virtio_net.c b/drivers/net/virtio_net.c
index 70c1d4e850e0..27ed25e70177 100644
--- a/drivers/net/virtio_net.c
+++ b/drivers/net/virtio_net.c
@@ -102,32 +102,29 @@ struct virtnet_rq_stats {
u64_stats_t kicks;
};
-#define VIRTNET_SQ_STAT(m) offsetof(struct virtnet_sq_stats, m)
-#define VIRTNET_RQ_STAT(m) offsetof(struct virtnet_rq_stats, m)
+#define VIRTNET_SQ_STAT(name, m) {name, offsetof(struct virtnet_sq_stats, m)}
+#define VIRTNET_RQ_STAT(name, m) {name, offsetof(struct virtnet_rq_stats, m)}
static const struct virtnet_stat_desc virtnet_sq_stats_desc[] = {
- { "packets", VIRTNET_SQ_STAT(packets) },
- { "bytes", VIRTNET_SQ_STAT(bytes) },
- { "xdp_tx", VIRTNET_SQ_STAT(xdp_tx) },
- { "xdp_tx_drops", VIRTNET_SQ_STAT(xdp_tx_drops) },
- { "kicks", VIRTNET_SQ_STAT(kicks) },
- { "tx_timeouts", VIRTNET_SQ_STAT(tx_timeouts) },
+ VIRTNET_SQ_STAT("packets", packets),
+ VIRTNET_SQ_STAT("bytes", bytes),
+ VIRTNET_SQ_STAT("xdp_tx", xdp_tx),
+ VIRTNET_SQ_STAT("xdp_tx_drops", xdp_tx_drops),
+ VIRTNET_SQ_STAT("kicks", kicks),
+ VIRTNET_SQ_STAT("tx_timeouts", tx_timeouts),
};
static const struct virtnet_stat_desc virtnet_rq_stats_desc[] = {
- { "packets", VIRTNET_RQ_STAT(packets) },
- { "bytes", VIRTNET_RQ_STAT(bytes) },
- { "drops", VIRTNET_RQ_STAT(drops) },
- { "xdp_packets", VIRTNET_RQ_STAT(xdp_packets) },
- { "xdp_tx", VIRTNET_RQ_STAT(xdp_tx) },
- { "xdp_redirects", VIRTNET_RQ_STAT(xdp_redirects) },
- { "xdp_drops", VIRTNET_RQ_STAT(xdp_drops) },
- { "kicks", VIRTNET_RQ_STAT(kicks) },
+ VIRTNET_RQ_STAT("packets", packets),
+ VIRTNET_RQ_STAT("bytes", bytes),
+ VIRTNET_RQ_STAT("drops", drops),
+ VIRTNET_RQ_STAT("xdp_packets", xdp_packets),
+ VIRTNET_RQ_STAT("xdp_tx", xdp_tx),
+ VIRTNET_RQ_STAT("xdp_redirects", xdp_redirects),
+ VIRTNET_RQ_STAT("xdp_drops", xdp_drops),
+ VIRTNET_RQ_STAT("kicks", kicks),
};
-#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)}
@@ -208,10 +205,10 @@ static const struct virtnet_stat_desc virtnet_stats_tx_speed_desc[] = {
#define VIRTNET_Q_TYPE_CQ 2
struct virtnet_stats_map {
- /* The stat type in bitmap. */
+ /* The stat type in bitmap. Just for device stats. */
u64 stat_type;
- /* The bytes of the response for the stat. */
+ /* The bytes of the response for the stat. Just for device stats. */
u32 len;
/* The num of the response fields for the stat. */
@@ -220,9 +217,12 @@ struct virtnet_stats_map {
/* The type of queue corresponding to the statistics. (cq, rq, sq) */
u32 queue_type;
- /* The reply type of the stat. */
+ /* The reply type of the stat. Just for device stats. */
u8 reply_type;
+ /* The stats are counted by the driver. */
+ bool from_driver;
+
/* Describe the name and the offset in the response. */
const struct virtnet_stat_desc *desc;
};
@@ -234,10 +234,24 @@ struct virtnet_stats_map {
ARRAY_SIZE(virtnet_stats_ ## type ##_desc), \
VIRTNET_Q_TYPE_##queue_type, \
VIRTIO_NET_STATS_TYPE_REPLY_##TYPE, \
+ false, \
&virtnet_stats_##type##_desc[0] \
}
+#define VIRTNET_DRIVER_STATS_MAP_ITEM(type, queue_type) \
+ { \
+ 0, 0, \
+ ARRAY_SIZE(virtnet_ ## type ## _stats_desc), \
+ VIRTNET_Q_TYPE_##queue_type, \
+ 0, true, \
+ &virtnet_##type##_stats_desc[0] \
+ }
+
static struct virtnet_stats_map virtio_net_stats_map[] = {
+ /* Driver stats should on the start. */
+ VIRTNET_DRIVER_STATS_MAP_ITEM(rq, RX),
+ VIRTNET_DRIVER_STATS_MAP_ITEM(sq, TX),
+
VIRTNET_DEVICE_STATS_MAP_ITEM(CVQ, cvq, CQ),
VIRTNET_DEVICE_STATS_MAP_ITEM(RX_BASIC, rx_basic, RX),
@@ -251,6 +265,11 @@ static struct virtnet_stats_map virtio_net_stats_map[] = {
VIRTNET_DEVICE_STATS_MAP_ITEM(TX_SPEED, tx_speed, TX),
};
+#define virtnet_stats_supported(vi, m) ({ \
+ typeof(m) _m = (m); \
+ (((vi)->device_stats_cap & _m->stat_type) || _m->from_driver); \
+})
+
struct virtnet_interrupt_coalesce {
u32 max_packets;
u32 max_usecs;
@@ -2266,7 +2285,7 @@ static int virtnet_receive(struct receive_queue *rq, int budget,
u64_stats_set(&stats.packets, packets);
u64_stats_update_begin(&rq->stats.syncp);
- for (i = 0; i < VIRTNET_RQ_STATS_LEN; i++) {
+ for (i = 0; i < ARRAY_SIZE(virtnet_rq_stats_desc); i++) {
size_t offset = virtnet_rq_stats_desc[i].offset;
u64_stats_t *item, *src;
@@ -3400,38 +3419,34 @@ static int virtnet_set_channels(struct net_device *dev,
return err;
}
-static void virtnet_get_hw_stats_string(struct virtnet_info *vi, int type, int qid, u8 **data)
+static void virtnet_get_stats_string(struct virtnet_info *vi, int type, int qid, u8 **data)
{
struct virtnet_stats_map *m;
+ const char *tp, *hw, *desc;
int i, j;
u8 *p = *data;
- if (!virtio_has_feature(vi->vdev, VIRTIO_NET_F_DEVICE_STATS))
- return;
-
for (i = 0; i < ARRAY_SIZE(virtio_net_stats_map); ++i) {
m = &virtio_net_stats_map[i];
if (m->queue_type != type)
continue;
- if (!(vi->device_stats_cap & m->stat_type))
+ if (!virtnet_stats_supported(vi, m))
continue;
+ hw = m->from_driver ? "" : "_hw";
+ tp = type == VIRTNET_Q_TYPE_RX ? "rx" : "tx";
+
for (j = 0; j < m->num; ++j) {
- switch (type) {
- case VIRTNET_Q_TYPE_RX:
- ethtool_sprintf(&p, "rx_queue_hw_%u_%s", qid, m->desc[j].desc);
- break;
-
- case VIRTNET_Q_TYPE_TX:
- ethtool_sprintf(&p, "tx_queue_hw_%u_%s", qid, m->desc[j].desc);
- break;
-
- case VIRTNET_Q_TYPE_CQ:
- ethtool_sprintf(&p, "cq_hw_%s", m->desc[j].desc);
- break;
+ desc = m->desc[j].desc;
+
+ if (type == VIRTNET_Q_TYPE_CQ) {
+ ethtool_sprintf(&p, "cq%s_%s", hw, desc);
+ continue;
}
+
+ ethtool_sprintf(&p, "%s%u%s_%s", tp, qid, hw, desc);
}
}
@@ -3460,7 +3475,7 @@ static void virtnet_stats_ctx_init(struct virtnet_info *vi,
for (i = 0; i < ARRAY_SIZE(virtio_net_stats_map); ++i) {
m = &virtio_net_stats_map[i];
- if (!(vi->device_stats_cap & m->stat_type))
+ if (!virtnet_stats_supported(vi, m))
continue;
ctx->bitmap[m->queue_type] |= m->stat_type;
@@ -3470,51 +3485,64 @@ static void virtnet_stats_ctx_init(struct virtnet_info *vi,
}
/* virtnet_fill_stats - copy the stats to ethtool -S
- * The stats source is the device.
+ * The stats source is the device or the driver.
*
* @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
+ * @base: pointer to the device reply or the driver stats structure.
+ * @from_driver: designate the base type (device reply, driver stats)
+ * @type: the type of the device reply (if from_driver is true, this must be
+ * zero)
*/
static void virtnet_fill_stats(struct virtnet_info *vi, u32 qid,
struct virtnet_stats_ctx *ctx,
- const u8 *base, u8 type)
+ const u8 *base, bool from_driver, u8 type)
{
u32 queue_type, num_rx, num_tx, num_cq;
+ const struct virtnet_stat_desc *desc;
struct virtnet_stats_map *m;
- u64 offset, bitmap;
+ const u64_stats_t *v_stat;
const __le64 *v;
+ u64 offset;
int i, j;
- 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];
+ num_rx = ctx->desc_num[VIRTNET_Q_TYPE_RX];
+ num_tx = ctx->desc_num[VIRTNET_Q_TYPE_TX];
queue_type = vq_type(vi, qid);
- bitmap = ctx->bitmap[queue_type];
offset = 0;
- if (queue_type == VIRTNET_Q_TYPE_TX) {
+ 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;
- }
+ else if (queue_type == VIRTNET_Q_TYPE_RX)
+ offset = num_cq + num_rx * (qid / 2);
for (i = 0; i < ARRAY_SIZE(virtio_net_stats_map); ++i) {
m = &virtio_net_stats_map[i];
- if (m->stat_type & bitmap)
- offset += m->num;
+ if (m->queue_type != queue_type)
+ continue;
- if (type != m->reply_type)
+ if (!virtnet_stats_supported(vi, m))
continue;
+ /* Checking whether this "m" matches "base" or not. */
+ if (from_driver != m->from_driver || type != m->reply_type) {
+ offset += m->num;
+ continue;
+ }
+
for (j = 0; j < m->num; ++j) {
- v = (const __le64 *)(base + m->desc[j].offset);
- ctx->data[offset + j] = le64_to_cpu(*v);
+ desc = &m->desc[j];
+ if (!from_driver) {
+ v = (const __le64 *)(base + desc->offset);
+ ctx->data[offset + j] = le64_to_cpu(*v);
+ } else {
+ v_stat = (const u64_stats_t *)(base + desc->offset);
+ ctx->data[offset + j] = u64_stats_read(v_stat);
+ }
}
break;
@@ -3548,7 +3576,7 @@ static int __virtnet_get_hw_stats(struct virtnet_info *vi,
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);
+ virtnet_fill_stats(vi, qid, ctx, p, false, hdr->type);
}
kfree(reply);
@@ -3620,28 +3648,18 @@ static int virtnet_get_hw_stats(struct virtnet_info *vi,
static void virtnet_get_strings(struct net_device *dev, u32 stringset, u8 *data)
{
struct virtnet_info *vi = netdev_priv(dev);
- unsigned int i, j;
+ unsigned int i;
u8 *p = 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_stats_string(vi, VIRTNET_Q_TYPE_CQ, 0, &p);
- virtnet_get_hw_stats_string(vi, VIRTNET_Q_TYPE_RX, i, &p);
- }
+ for (i = 0; i < vi->curr_queue_pairs; ++i)
+ virtnet_get_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);
- }
+ for (i = 0; i < vi->curr_queue_pairs; ++i)
+ virtnet_get_stats_string(vi, VIRTNET_Q_TYPE_TX, i, &p);
break;
}
}
@@ -3674,8 +3692,7 @@ static int virtnet_get_sset_count(struct net_device *dev, int sset)
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];
+ 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:
@@ -3688,47 +3705,28 @@ static void virtnet_get_ethtool_stats(struct net_device *dev,
{
struct virtnet_info *vi = netdev_priv(dev);
struct virtnet_stats_ctx ctx = {0};
- unsigned int idx, start, i, j;
+ unsigned int start, i;
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];
+ struct send_queue *sq = &vi->sq[i];
stats_base = (const u8 *)&rq->stats;
do {
start = u64_stats_fetch_begin(&rq->stats.syncp);
- for (j = 0; j < VIRTNET_RQ_STATS_LEN; j++) {
- offset = virtnet_rq_stats_desc[j].offset;
- p = (const u64_stats_t *)(stats_base + offset);
- data[idx + j] = u64_stats_read(p);
- }
+ virtnet_fill_stats(vi, i * 2, &ctx, stats_base, true, 0);
} 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++) {
- struct send_queue *sq = &vi->sq[i];
stats_base = (const u8 *)&sq->stats;
do {
start = u64_stats_fetch_begin(&sq->stats.syncp);
- for (j = 0; j < VIRTNET_SQ_STATS_LEN; j++) {
- offset = virtnet_sq_stats_desc[j].offset;
- p = (const u64_stats_t *)(stats_base + offset);
- data[idx + j] = u64_stats_read(p);
- }
+ virtnet_fill_stats(vi, i * 2 + 1, &ctx, stats_base, true, 0);
} while (u64_stats_fetch_retry(&sq->stats.syncp, start));
- idx += VIRTNET_SQ_STATS_LEN;
- idx += ctx.desc_num[VIRTNET_Q_TYPE_TX];
}
}
--
2.32.0.3.g01195cf9f
