mirrors
/
linux-stable
mirror of https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
1
0
Fork 0
Code Issues Releases Wiki Activity

virtio-net: get rid of unnecessary container of rq stats 

We don't maintain tx counters in rx stats any more. There's no need
for an extra container of rq stats.

Cc: Toshiaki Makita <makita.toshiaki@lab.ntt.co.jp>
Signed-off-by: Jason Wang <jasowang@redhat.com>
Acked-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Jason Wang 2018-07-31 17:43:39 +08:00 committed by David S. Miller
parent ca9e83b4a5
commit d46eeeaf99
1 changed files with 36 additions and 44 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

80
drivers/net/virtio_net.c
View File

@ -87,7 +87,8 @@ struct virtnet_sq_stats {
u64 kicks;
};
struct virtnet_rq_stat_items {
struct virtnet_rq_stats {
struct u64_stats_sync syncp;
u64 packets;
u64 bytes;
u64 drops;
@ -98,17 +99,8 @@ struct virtnet_rq_stat_items {
u64 kicks;
};
struct virtnet_rq_stats {
struct u64_stats_sync syncp;
struct virtnet_rq_stat_items items;
};
struct virtnet_rx_stats {
struct virtnet_rq_stat_items rx;
};
#define VIRTNET_SQ_STAT(m) offsetof(struct virtnet_sq_stats, m)
#define VIRTNET_RQ_STAT(m) offsetof(struct virtnet_rq_stat_items, m)
#define VIRTNET_RQ_STAT(m) offsetof(struct virtnet_rq_stats, m)
static const struct virtnet_stat_desc virtnet_sq_stats_desc[] = {
{ "packets", VIRTNET_SQ_STAT(packets) },
@ -617,7 +609,7 @@ static struct sk_buff *receive_small(struct net_device *dev,
void *buf, void *ctx,
unsigned int len,
unsigned int *xdp_xmit,
struct virtnet_rx_stats *stats)
struct virtnet_rq_stats *stats)
{
struct sk_buff *skb;
struct bpf_prog *xdp_prog;
@ -632,7 +624,7 @@ static struct sk_buff *receive_small(struct net_device *dev,
int err;
len -= vi->hdr_len;
stats->rx.bytes += len;
stats->bytes += len;
rcu_read_lock();
xdp_prog = rcu_dereference(rq->xdp_prog);
@ -674,7 +666,7 @@ static struct sk_buff *receive_small(struct net_device *dev,
xdp.rxq = &rq->xdp_rxq;
orig_data = xdp.data;
act = bpf_prog_run_xdp(xdp_prog, &xdp);
stats->rx.xdp_packets++;
stats->xdp_packets++;
switch (act) {
case XDP_PASS:
@ -683,7 +675,7 @@ static struct sk_buff *receive_small(struct net_device *dev,
len = xdp.data_end - xdp.data;
break;
case XDP_TX:
stats->rx.xdp_tx++;
stats->xdp_tx++;
xdpf = convert_to_xdp_frame(&xdp);
if (unlikely(!xdpf))
goto err_xdp;
@ -696,7 +688,7 @@ static struct sk_buff *receive_small(struct net_device *dev,
rcu_read_unlock();
goto xdp_xmit;
case XDP_REDIRECT:
stats->rx.xdp_redirects++;
stats->xdp_redirects++;
err = xdp_do_redirect(dev, &xdp, xdp_prog);
if (err)
goto err_xdp;
@ -730,8 +722,8 @@ err:
err_xdp:
rcu_read_unlock();
stats->rx.xdp_drops++;
stats->rx.drops++;
stats->xdp_drops++;
stats->drops++;
put_page(page);
xdp_xmit:
return NULL;
@ -742,19 +734,19 @@ static struct sk_buff *receive_big(struct net_device *dev,
struct receive_queue *rq,
void *buf,
unsigned int len,
struct virtnet_rx_stats *stats)
struct virtnet_rq_stats *stats)
{
struct page *page = buf;
struct sk_buff *skb = page_to_skb(vi, rq, page, 0, len, PAGE_SIZE);
stats->rx.bytes += len - vi->hdr_len;
stats->bytes += len - vi->hdr_len;
if (unlikely(!skb))
goto err;
return skb;
err:
stats->rx.drops++;
stats->drops++;
give_pages(rq, page);
return NULL;
}
@ -766,7 +758,7 @@ static struct sk_buff *receive_mergeable(struct net_device *dev,
void *ctx,
unsigned int len,
unsigned int *xdp_xmit,
struct virtnet_rx_stats *stats)
struct virtnet_rq_stats *stats)
{
struct virtio_net_hdr_mrg_rxbuf *hdr = buf;
u16 num_buf = virtio16_to_cpu(vi->vdev, hdr->num_buffers);
@ -779,7 +771,7 @@ static struct sk_buff *receive_mergeable(struct net_device *dev,
int err;
head_skb = NULL;
stats->rx.bytes += len - vi->hdr_len;
stats->bytes += len - vi->hdr_len;
rcu_read_lock();
xdp_prog = rcu_dereference(rq->xdp_prog);
@ -828,7 +820,7 @@ static struct sk_buff *receive_mergeable(struct net_device *dev,
xdp.rxq = &rq->xdp_rxq;
act = bpf_prog_run_xdp(xdp_prog, &xdp);
stats->rx.xdp_packets++;
stats->xdp_packets++;
switch (act) {
case XDP_PASS:
@ -853,7 +845,7 @@ static struct sk_buff *receive_mergeable(struct net_device *dev,
}
break;
case XDP_TX:
stats->rx.xdp_tx++;
stats->xdp_tx++;
xdpf = convert_to_xdp_frame(&xdp);
if (unlikely(!xdpf))
goto err_xdp;
@ -870,7 +862,7 @@ static struct sk_buff *receive_mergeable(struct net_device *dev,
rcu_read_unlock();
goto xdp_xmit;
case XDP_REDIRECT:
stats->rx.xdp_redirects++;
stats->xdp_redirects++;
err = xdp_do_redirect(dev, &xdp, xdp_prog);
if (err) {
if (unlikely(xdp_page != page))
@ -920,7 +912,7 @@ static struct sk_buff *receive_mergeable(struct net_device *dev,
goto err_buf;
}
stats->rx.bytes += len;
stats->bytes += len;
page = virt_to_head_page(buf);
truesize = mergeable_ctx_to_truesize(ctx);
@ -966,7 +958,7 @@ static struct sk_buff *receive_mergeable(struct net_device *dev,
err_xdp:
rcu_read_unlock();
stats->rx.xdp_drops++;
stats->xdp_drops++;
err_skb:
put_page(page);
while (num_buf-- > 1) {
@ -977,12 +969,12 @@ err_skb:
dev->stats.rx_length_errors++;
break;
}
stats->rx.bytes += len;
stats->bytes += len;
page = virt_to_head_page(buf);
put_page(page);
}
err_buf:
stats->rx.drops++;
stats->drops++;
dev_kfree_skb(head_skb);
xdp_xmit:
return NULL;
@ -991,7 +983,7 @@ xdp_xmit:
static void receive_buf(struct virtnet_info *vi, struct receive_queue *rq,
void *buf, unsigned int len, void **ctx,
unsigned int *xdp_xmit,
struct virtnet_rx_stats *stats)
struct virtnet_rq_stats *stats)
{
struct net_device *dev = vi->dev;
struct sk_buff *skb;
@ -1212,7 +1204,7 @@ static bool try_fill_recv(struct virtnet_info *vi, struct receive_queue *rq,
} while (rq->vq->num_free);
if (virtqueue_kick_prepare(rq->vq) && virtqueue_notify(rq->vq)) {
u64_stats_update_begin(&rq->stats.syncp);
rq->stats.items.kicks++;
rq->stats.kicks++;
u64_stats_update_end(&rq->stats.syncp);
}
@ -1290,7 +1282,7 @@ static int virtnet_receive(struct receive_queue *rq, int budget,
unsigned int *xdp_xmit)
{
struct virtnet_info *vi = rq->vq->vdev->priv;
struct virtnet_rx_stats stats = {};
struct virtnet_rq_stats stats = {};
unsigned int len;
void *buf;
int i;
@ -1298,16 +1290,16 @@ static int virtnet_receive(struct receive_queue *rq, int budget,
if (!vi->big_packets || vi->mergeable_rx_bufs) {
void *ctx;
while (stats.rx.packets < budget &&
while (stats.packets < budget &&
(buf = virtqueue_get_buf_ctx(rq->vq, &len, &ctx))) {
receive_buf(vi, rq, buf, len, ctx, xdp_xmit, &stats);
stats.rx.packets++;
stats.packets++;
}
} else {
while (stats.rx.packets < budget &&
while (stats.packets < budget &&
(buf = virtqueue_get_buf(rq->vq, &len)) != NULL) {
receive_buf(vi, rq, buf, len, NULL, xdp_xmit, &stats);
stats.rx.packets++;
stats.packets++;
}
}
@ -1321,12 +1313,12 @@ static int virtnet_receive(struct receive_queue *rq, int budget,
size_t offset = virtnet_rq_stats_desc[i].offset;
u64 *item;
item = (u64 *)((u8 *)&rq->stats.items + offset);
*item += *(u64 *)((u8 *)&stats.rx + offset);
item = (u64 *)((u8 *)&rq->stats + offset);
*item += *(u64 *)((u8 *)&stats + offset);
}
u64_stats_update_end(&rq->stats.syncp);
return stats.rx.packets;
return stats.packets;
}
static void free_old_xmit_skbs(struct send_queue *sq)
@ -1686,9 +1678,9 @@ static void virtnet_stats(struct net_device *dev,
do {
start = u64_stats_fetch_begin_irq(&rq->stats.syncp);
rpackets = rq->stats.items.packets;
rbytes = rq->stats.items.bytes;
rdrops = rq->stats.items.drops;
rpackets = rq->stats.packets;
rbytes = rq->stats.bytes;
rdrops = rq->stats.drops;
} while (u64_stats_fetch_retry_irq(&rq->stats.syncp, start));
tot->rx_packets += rpackets;
@ -2078,7 +2070,7 @@ static void virtnet_get_ethtool_stats(struct net_device *dev,
for (i = 0; i < vi->curr_queue_pairs; i++) {
struct receive_queue *rq = &vi->rq[i];
stats_base = (u8 *)&rq->stats.items;
stats_base = (u8 *)&rq->stats;
do {
start = u64_stats_fetch_begin_irq(&rq->stats.syncp);
for (j = 0; j < VIRTNET_RQ_STATS_LEN; j++) {