Currently the usbnet core does not update the tx_packets statistic for
drivers with FLAG_MULTI_PACKET and there is no hook in the TX
completion path where they could do this.
cdc_ncm and dependent drivers are bumping tx_packets stat on the
transmit path while asix and sr9800 aren't updating it at all.
Add a packet count in struct skb_data so these drivers can fill it
in, initialise it to 1 for other drivers, and add the packet count
to the tx_packets statistic on completion.
Signed-off-by: Ben Hutchings <ben.hutchings@xxxxxxxxxxxxxxx>
---
I have only tested the asix driver after this change; I think cdc_ncm
and one of the non-multi-packet drivers should also be tested before
it's applied.
Ben.
drivers/net/usb/asix_common.c | 2 ++
drivers/net/usb/cdc_ncm.c | 3 ++-
drivers/net/usb/sr9800.c | 1 +
drivers/net/usb/usbnet.c | 5 +++--
include/linux/usb/usbnet.h | 12 ++++++++++++
5 files changed, 20 insertions(+), 3 deletions(-)
diff --git a/drivers/net/usb/asix_common.c b/drivers/net/usb/asix_common.c
index 5c55f11572ba..724a9b50df7a 100644
--- a/drivers/net/usb/asix_common.c
+++ b/drivers/net/usb/asix_common.c
@@ -188,6 +188,8 @@ struct sk_buff *asix_tx_fixup(struct usbnet *dev, struct sk_buff *skb,
memcpy(skb_tail_pointer(skb), &padbytes, sizeof(padbytes));
skb_put(skb, sizeof(padbytes));
}
+
+ usbnet_set_skb_tx_stats(skb, 1);
return skb;
}
diff --git a/drivers/net/usb/cdc_ncm.c b/drivers/net/usb/cdc_ncm.c
index 80a844e0ae03..70cbea551139 100644
--- a/drivers/net/usb/cdc_ncm.c
+++ b/drivers/net/usb/cdc_ncm.c
@@ -1172,7 +1172,6 @@ cdc_ncm_fill_tx_frame(struct usbnet *dev, struct sk_buff *skb, __le32 sign)
/* return skb */
ctx->tx_curr_skb = NULL;
- dev->net->stats.tx_packets += ctx->tx_curr_frame_num;
/* keep private stats: framing overhead and number of NTBs */
ctx->tx_overhead += skb_out->len - ctx->tx_curr_frame_payload;
@@ -1184,6 +1183,8 @@ cdc_ncm_fill_tx_frame(struct usbnet *dev, struct sk_buff *skb, __le32 sign)
*/
dev->net->stats.tx_bytes -= skb_out->len - ctx->tx_curr_frame_payload;
+ usbnet_set_skb_tx_stats(skb_out, n);
+
return skb_out;
exit_no_skb:
diff --git a/drivers/net/usb/sr9800.c b/drivers/net/usb/sr9800.c
index b94a0fbb8b3b..7650cdc8fe6b 100644
--- a/drivers/net/usb/sr9800.c
+++ b/drivers/net/usb/sr9800.c
@@ -144,6 +144,7 @@ static struct sk_buff *sr_tx_fixup(struct usbnet *dev, struct sk_buff *skb,
skb_put(skb, sizeof(padbytes));
}
+ usbnet_set_skb_tx_stats(skb, 1);
return skb;
}
diff --git a/drivers/net/usb/usbnet.c b/drivers/net/usb/usbnet.c
index 449835f4331e..0f3ff285f6a1 100644
--- a/drivers/net/usb/usbnet.c
+++ b/drivers/net/usb/usbnet.c
@@ -1188,8 +1188,7 @@ static void tx_complete (struct urb *urb)
struct usbnet *dev = entry->dev;
if (urb->status == 0) {
- if (!(dev->driver_info->flags & FLAG_MULTI_PACKET))
- dev->net->stats.tx_packets++;
+ dev->net->stats.tx_packets += entry->packets;
dev->net->stats.tx_bytes += entry->length;
} else {
dev->net->stats.tx_errors++;
@@ -1348,6 +1347,8 @@ netdev_tx_t usbnet_start_xmit (struct sk_buff *skb,
urb->transfer_flags |= URB_ZERO_PACKET;
}
entry->length = urb->transfer_buffer_length = length;
+ if (!(info->flags & FLAG_MULTI_PACKET))
+ usbnet_set_skb_tx_stats(skb, 1);
spin_lock_irqsave(&dev->txq.lock, flags);
retval = usb_autopm_get_interface_async(dev->intf);
diff --git a/include/linux/usb/usbnet.h b/include/linux/usb/usbnet.h
index d9a4905e01d0..ff3fb2bd0e90 100644
--- a/include/linux/usb/usbnet.h
+++ b/include/linux/usb/usbnet.h
@@ -228,8 +228,20 @@ struct skb_data { /* skb->cb is one of these */
struct usbnet *dev;
enum skb_state state;
size_t length;
+ unsigned long packets;
};
+/* Drivers that set FLAG_MULTI_PACKET must call this in their
+ * tx_fixup method before returning an skb.
+ */
+static inline void
+usbnet_set_skb_tx_stats(struct sk_buff *skb, unsigned long packets)
+{
+ struct skb_data *entry = (struct skb_data *) skb->cb;
+
+ entry->packets = packets;
+}
+
extern int usbnet_open(struct net_device *net);
extern int usbnet_stop(struct net_device *net);
extern netdev_tx_t usbnet_start_xmit(struct sk_buff *skb,
--
1.7.10.4
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