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https://github.com/torvalds/linux
synced 2024-10-02 01:10:22 +00:00
veth: introduce more specialized counters in veth_stats
Introduce xdp_tx, xdp_redirect and rx_drops counters in veth_stats data structure. Move stats accounting in veth_poll. Remove xdp_xmit variable in veth_xdp_rcv_one/veth_xdp_rcv_skb and rely on veth_stats counters. This is a preliminary patch to align veth xdp statistics to mlx, intel and marvell xdp implementation Signed-off-by: Lorenzo Bianconi <lorenzo@kernel.org> Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Lorenzo Bianconi
David S. Miller
parent
65780c5627
commit
1c5b82e55f
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@ -34,16 +34,16 @@
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#define VETH_RING_SIZE 256
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#define VETH_XDP_HEADROOM (XDP_PACKET_HEADROOM + NET_IP_ALIGN)
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/* Separating two types of XDP xmit */
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#define VETH_XDP_TX BIT(0)
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#define VETH_XDP_REDIR BIT(1)
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#define VETH_XDP_TX_BULK_SIZE 16
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struct veth_stats {
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u64 rx_drops;
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/* xdp */
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u64 xdp_packets;
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u64 xdp_bytes;
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u64 xdp_redirect;
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u64 xdp_drops;
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u64 xdp_tx;
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};
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struct veth_rq_stats {
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@ -493,8 +493,8 @@ static int veth_xdp_tx(struct net_device *dev, struct xdp_buff *xdp,
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static struct sk_buff *veth_xdp_rcv_one(struct veth_rq *rq,
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struct xdp_frame *frame,
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unsigned int *xdp_xmit,
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struct veth_xdp_tx_bq *bq)
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struct veth_xdp_tx_bq *bq,
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struct veth_stats *stats)
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{
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void *hard_start = frame->data - frame->headroom;
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void *head = hard_start - sizeof(struct xdp_frame);
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@ -530,9 +530,10 @@ static struct sk_buff *veth_xdp_rcv_one(struct veth_rq *rq,
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if (unlikely(veth_xdp_tx(rq->dev, &xdp, bq) < 0)) {
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trace_xdp_exception(rq->dev, xdp_prog, act);
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frame = &orig_frame;
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stats->rx_drops++;
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goto err_xdp;
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}
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*xdp_xmit |= VETH_XDP_TX;
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stats->xdp_tx++;
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rcu_read_unlock();
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goto xdp_xmit;
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case XDP_REDIRECT:
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@ -541,9 +542,10 @@ static struct sk_buff *veth_xdp_rcv_one(struct veth_rq *rq,
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xdp.rxq->mem = frame->mem;
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if (xdp_do_redirect(rq->dev, &xdp, xdp_prog)) {
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frame = &orig_frame;
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stats->rx_drops++;
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goto err_xdp;
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}
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*xdp_xmit |= VETH_XDP_REDIR;
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stats->xdp_redirect++;
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rcu_read_unlock();
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goto xdp_xmit;
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default:
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@ -553,6 +555,7 @@ static struct sk_buff *veth_xdp_rcv_one(struct veth_rq *rq,
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trace_xdp_exception(rq->dev, xdp_prog, act);
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/* fall through */
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case XDP_DROP:
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stats->xdp_drops++;
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goto err_xdp;
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}
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}
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@ -562,6 +565,7 @@ static struct sk_buff *veth_xdp_rcv_one(struct veth_rq *rq,
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skb = veth_build_skb(head, headroom, len, 0);
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if (!skb) {
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xdp_return_frame(frame);
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stats->rx_drops++;
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goto err;
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}
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@ -577,9 +581,10 @@ static struct sk_buff *veth_xdp_rcv_one(struct veth_rq *rq,
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return NULL;
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}
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static struct sk_buff *veth_xdp_rcv_skb(struct veth_rq *rq, struct sk_buff *skb,
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unsigned int *xdp_xmit,
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struct veth_xdp_tx_bq *bq)
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static struct sk_buff *veth_xdp_rcv_skb(struct veth_rq *rq,
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struct sk_buff *skb,
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struct veth_xdp_tx_bq *bq,
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struct veth_stats *stats)
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{
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u32 pktlen, headroom, act, metalen;
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void *orig_data, *orig_data_end;
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@ -657,18 +662,21 @@ static struct sk_buff *veth_xdp_rcv_skb(struct veth_rq *rq, struct sk_buff *skb,
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xdp.rxq->mem = rq->xdp_mem;
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if (unlikely(veth_xdp_tx(rq->dev, &xdp, bq) < 0)) {
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trace_xdp_exception(rq->dev, xdp_prog, act);
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stats->rx_drops++;
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goto err_xdp;
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}
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*xdp_xmit |= VETH_XDP_TX;
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stats->xdp_tx++;
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rcu_read_unlock();
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goto xdp_xmit;
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case XDP_REDIRECT:
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get_page(virt_to_page(xdp.data));
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consume_skb(skb);
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xdp.rxq->mem = rq->xdp_mem;
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if (xdp_do_redirect(rq->dev, &xdp, xdp_prog))
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if (xdp_do_redirect(rq->dev, &xdp, xdp_prog)) {
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stats->rx_drops++;
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goto err_xdp;
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*xdp_xmit |= VETH_XDP_REDIR;
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}
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stats->xdp_redirect++;
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rcu_read_unlock();
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goto xdp_xmit;
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default:
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@ -678,7 +686,8 @@ static struct sk_buff *veth_xdp_rcv_skb(struct veth_rq *rq, struct sk_buff *skb,
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trace_xdp_exception(rq->dev, xdp_prog, act);
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/* fall through */
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case XDP_DROP:
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goto drop;
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stats->xdp_drops++;
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goto xdp_drop;
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}
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rcu_read_unlock();
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@ -700,6 +709,8 @@ static struct sk_buff *veth_xdp_rcv_skb(struct veth_rq *rq, struct sk_buff *skb,
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out:
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return skb;
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drop:
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stats->rx_drops++;
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xdp_drop:
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rcu_read_unlock();
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kfree_skb(skb);
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return NULL;
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@ -710,14 +721,14 @@ static struct sk_buff *veth_xdp_rcv_skb(struct veth_rq *rq, struct sk_buff *skb,
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return NULL;
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}
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static int veth_xdp_rcv(struct veth_rq *rq, int budget, unsigned int *xdp_xmit,
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struct veth_xdp_tx_bq *bq)
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static int veth_xdp_rcv(struct veth_rq *rq, int budget,
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struct veth_xdp_tx_bq *bq,
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struct veth_stats *stats)
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{
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int i, done = 0, drops = 0, bytes = 0;
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int i, done = 0;
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for (i = 0; i < budget; i++) {
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void *ptr = __ptr_ring_consume(&rq->xdp_ring);
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unsigned int xdp_xmit_one = 0;
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struct sk_buff *skb;
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if (!ptr)
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@ -726,27 +737,24 @@ static int veth_xdp_rcv(struct veth_rq *rq, int budget, unsigned int *xdp_xmit,
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if (veth_is_xdp_frame(ptr)) {
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struct xdp_frame *frame = veth_ptr_to_xdp(ptr);
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bytes += frame->len;
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skb = veth_xdp_rcv_one(rq, frame, &xdp_xmit_one, bq);
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stats->xdp_bytes += frame->len;
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skb = veth_xdp_rcv_one(rq, frame, bq, stats);
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} else {
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skb = ptr;
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bytes += skb->len;
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skb = veth_xdp_rcv_skb(rq, skb, &xdp_xmit_one, bq);
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stats->xdp_bytes += skb->len;
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skb = veth_xdp_rcv_skb(rq, skb, bq, stats);
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}
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*xdp_xmit |= xdp_xmit_one;
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if (skb)
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napi_gro_receive(&rq->xdp_napi, skb);
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else if (!xdp_xmit_one)
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drops++;
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done++;
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}
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u64_stats_update_begin(&rq->stats.syncp);
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rq->stats.vs.xdp_bytes += stats->xdp_bytes;
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rq->stats.vs.xdp_drops += stats->xdp_drops + stats->rx_drops;
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rq->stats.vs.xdp_packets += done;
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rq->stats.vs.xdp_bytes += bytes;
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rq->stats.vs.xdp_drops += drops;
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u64_stats_update_end(&rq->stats.syncp);
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return done;
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@ -756,14 +764,14 @@ static int veth_poll(struct napi_struct *napi, int budget)
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{
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struct veth_rq *rq =
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container_of(napi, struct veth_rq, xdp_napi);
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unsigned int xdp_xmit = 0;
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struct veth_stats stats = {};
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struct veth_xdp_tx_bq bq;
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int done;
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bq.count = 0;
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xdp_set_return_frame_no_direct();
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done = veth_xdp_rcv(rq, budget, &xdp_xmit, &bq);
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done = veth_xdp_rcv(rq, budget, &bq, &stats);
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if (done < budget && napi_complete_done(napi, done)) {
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/* Write rx_notify_masked before reading ptr_ring */
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@ -774,9 +782,9 @@ static int veth_poll(struct napi_struct *napi, int budget)
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}
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}
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if (xdp_xmit & VETH_XDP_TX)
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if (stats.xdp_tx > 0)
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veth_xdp_flush(rq->dev, &bq);
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if (xdp_xmit & VETH_XDP_REDIR)
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if (stats.xdp_redirect > 0)
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xdp_do_flush();
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xdp_clear_return_frame_no_direct();
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