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Commit 1c5b82e5 authored by Lorenzo Bianconi's avatar Lorenzo Bianconi Committed by David S. Miller
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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: default avatarLorenzo Bianconi <lorenzo@kernel.org>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 65780c56
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Inline Side-by-side
Showing with 40 additions and 32 deletions
drivers/net/veth.c
View file @ 1c5b82e5
......@@ -34,16 +34,16 @@
#define VETH_RING_SIZE 256
#define VETH_XDP_HEADROOM (XDP_PACKET_HEADROOM + NET_IP_ALIGN)
/* Separating two types of XDP xmit */
#define VETH_XDP_TX BIT(0)
#define VETH_XDP_REDIR BIT(1)
#define VETH_XDP_TX_BULK_SIZE 16
struct veth_stats {
u64 rx_drops;
/* xdp */
u64 xdp_packets;
u64 xdp_bytes;
u64 xdp_redirect;
u64 xdp_drops;
u64 xdp_tx;
};
struct veth_rq_stats {
......@@ -493,8 +493,8 @@ static int veth_xdp_tx(struct net_device *dev, struct xdp_buff *xdp,
static struct sk_buff *veth_xdp_rcv_one(struct veth_rq *rq,
struct xdp_frame *frame,
unsigned int *xdp_xmit,
struct veth_xdp_tx_bq *bq)
struct veth_xdp_tx_bq *bq,
struct veth_stats *stats)
{
void *hard_start = frame->data - frame->headroom;
void *head = hard_start - sizeof(struct xdp_frame);
......@@ -530,9 +530,10 @@ static struct sk_buff *veth_xdp_rcv_one(struct veth_rq *rq,
if (unlikely(veth_xdp_tx(rq->dev, &xdp, bq) < 0)) {
trace_xdp_exception(rq->dev, xdp_prog, act);
frame = &orig_frame;
stats->rx_drops++;
goto err_xdp;
}
*xdp_xmit |= VETH_XDP_TX;
stats->xdp_tx++;
rcu_read_unlock();
goto xdp_xmit;
case XDP_REDIRECT:
......@@ -541,9 +542,10 @@ static struct sk_buff *veth_xdp_rcv_one(struct veth_rq *rq,
xdp.rxq->mem = frame->mem;
if (xdp_do_redirect(rq->dev, &xdp, xdp_prog)) {
frame = &orig_frame;
stats->rx_drops++;
goto err_xdp;
}
*xdp_xmit |= VETH_XDP_REDIR;
stats->xdp_redirect++;
rcu_read_unlock();
goto xdp_xmit;
default:
......@@ -553,6 +555,7 @@ static struct sk_buff *veth_xdp_rcv_one(struct veth_rq *rq,
trace_xdp_exception(rq->dev, xdp_prog, act);
/* fall through */
case XDP_DROP:
stats->xdp_drops++;
goto err_xdp;
}
}
......@@ -562,6 +565,7 @@ static struct sk_buff *veth_xdp_rcv_one(struct veth_rq *rq,
skb = veth_build_skb(head, headroom, len, 0);
if (!skb) {
xdp_return_frame(frame);
stats->rx_drops++;
goto err;
}
......@@ -577,9 +581,10 @@ static struct sk_buff *veth_xdp_rcv_one(struct veth_rq *rq,
return NULL;
}
static struct sk_buff *veth_xdp_rcv_skb(struct veth_rq *rq, struct sk_buff *skb,
unsigned int *xdp_xmit,
struct veth_xdp_tx_bq *bq)
static struct sk_buff *veth_xdp_rcv_skb(struct veth_rq *rq,
struct sk_buff *skb,
struct veth_xdp_tx_bq *bq,
struct veth_stats *stats)
{
u32 pktlen, headroom, act, metalen;
void *orig_data, *orig_data_end;
......@@ -657,18 +662,21 @@ static struct sk_buff *veth_xdp_rcv_skb(struct veth_rq *rq, struct sk_buff *skb,
xdp.rxq->mem = rq->xdp_mem;
if (unlikely(veth_xdp_tx(rq->dev, &xdp, bq) < 0)) {
trace_xdp_exception(rq->dev, xdp_prog, act);
stats->rx_drops++;
goto err_xdp;
}
*xdp_xmit |= VETH_XDP_TX;
stats->xdp_tx++;
rcu_read_unlock();
goto xdp_xmit;
case XDP_REDIRECT:
get_page(virt_to_page(xdp.data));
consume_skb(skb);
xdp.rxq->mem = rq->xdp_mem;
if (xdp_do_redirect(rq->dev, &xdp, xdp_prog))
if (xdp_do_redirect(rq->dev, &xdp, xdp_prog)) {
stats->rx_drops++;
goto err_xdp;
*xdp_xmit |= VETH_XDP_REDIR;
}
stats->xdp_redirect++;
rcu_read_unlock();
goto xdp_xmit;
default:
......@@ -678,7 +686,8 @@ static struct sk_buff *veth_xdp_rcv_skb(struct veth_rq *rq, struct sk_buff *skb,
trace_xdp_exception(rq->dev, xdp_prog, act);
/* fall through */
case XDP_DROP:
goto drop;
stats->xdp_drops++;
goto xdp_drop;
}
rcu_read_unlock();
......@@ -700,6 +709,8 @@ static struct sk_buff *veth_xdp_rcv_skb(struct veth_rq *rq, struct sk_buff *skb,
out:
return skb;
drop:
stats->rx_drops++;
xdp_drop:
rcu_read_unlock();
kfree_skb(skb);
return NULL;
......@@ -710,14 +721,14 @@ static struct sk_buff *veth_xdp_rcv_skb(struct veth_rq *rq, struct sk_buff *skb,
return NULL;
}
static int veth_xdp_rcv(struct veth_rq *rq, int budget, unsigned int *xdp_xmit,
struct veth_xdp_tx_bq *bq)
static int veth_xdp_rcv(struct veth_rq *rq, int budget,
struct veth_xdp_tx_bq *bq,
struct veth_stats *stats)
{
int i, done = 0, drops = 0, bytes = 0;
int i, done = 0;
for (i = 0; i < budget; i++) {
void *ptr = __ptr_ring_consume(&rq->xdp_ring);
unsigned int xdp_xmit_one = 0;
struct sk_buff *skb;
if (!ptr)
......@@ -726,27 +737,24 @@ static int veth_xdp_rcv(struct veth_rq *rq, int budget, unsigned int *xdp_xmit,
if (veth_is_xdp_frame(ptr)) {
struct xdp_frame *frame = veth_ptr_to_xdp(ptr);
bytes += frame->len;
skb = veth_xdp_rcv_one(rq, frame, &xdp_xmit_one, bq);
stats->xdp_bytes += frame->len;
skb = veth_xdp_rcv_one(rq, frame, bq, stats);
} else {
skb = ptr;
bytes += skb->len;
skb = veth_xdp_rcv_skb(rq, skb, &xdp_xmit_one, bq);
stats->xdp_bytes += skb->len;
skb = veth_xdp_rcv_skb(rq, skb, bq, stats);
}
*xdp_xmit |= xdp_xmit_one;
if (skb)
napi_gro_receive(&rq->xdp_napi, skb);
else if (!xdp_xmit_one)
drops++;
done++;
}
u64_stats_update_begin(&rq->stats.syncp);
rq->stats.vs.xdp_bytes += stats->xdp_bytes;
rq->stats.vs.xdp_drops += stats->xdp_drops + stats->rx_drops;
rq->stats.vs.xdp_packets += done;
rq->stats.vs.xdp_bytes += bytes;
rq->stats.vs.xdp_drops += drops;
u64_stats_update_end(&rq->stats.syncp);
return done;
......@@ -756,14 +764,14 @@ static int veth_poll(struct napi_struct *napi, int budget)
{
struct veth_rq *rq =
container_of(napi, struct veth_rq, xdp_napi);
unsigned int xdp_xmit = 0;
struct veth_stats stats = {};
struct veth_xdp_tx_bq bq;
int done;
bq.count = 0;
xdp_set_return_frame_no_direct();
done = veth_xdp_rcv(rq, budget, &xdp_xmit, &bq);
done = veth_xdp_rcv(rq, budget, &bq, &stats);
if (done < budget && napi_complete_done(napi, done)) {
/* Write rx_notify_masked before reading ptr_ring */
......@@ -774,9 +782,9 @@ static int veth_poll(struct napi_struct *napi, int budget)
}
}
if (xdp_xmit & VETH_XDP_TX)
if (stats.xdp_tx > 0)
veth_xdp_flush(rq->dev, &bq);
if (xdp_xmit & VETH_XDP_REDIR)
if (stats.xdp_redirect > 0)
xdp_do_flush();
xdp_clear_return_frame_no_direct();
......
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