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Commit 3f300ff4 authored by Simon Xiao's avatar Simon Xiao Committed by David S. Miller
Browse files

hv_netvsc: introduce netif-msg into netvsc module 



1. Introduce netif-msg to netvsc to control debug logging output
and keep msg_enable in netvsc_device_context so that it is
kept persistently.
2. Only call dump_rndis_message() when NETIF_MSG_RX_ERR or above
is specified in netvsc module debug param.
In non-debug mode, in current code, dump_rndis_message() will not
dump anything but it still initialize some local variables and
process the switch logic which is unnecessary, especially in
high network throughput situation.

Signed-off-by: default avatarSimon Xiao <sixiao@microsoft.com>
Reviewed-by: default avatarK. Y. Srinivasan <kys@microsoft.com>
Reviewed-by: default avatarHaiyang Zhang <haiyangz@microsoft.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent cb6ccf09

drivers/net/hyperv/hyperv_net.h

+12 −0
Original line number Diff line number Diff line
@@ -612,6 +612,15 @@ struct multi_send_data { 
	u32 count; /* counter of batched packets */

};



/* The context of the netvsc device  */

struct net_device_context {

	/* point back to our device context */

	struct hv_device *device_ctx;

	struct delayed_work dwork;

	struct work_struct work;

	u32 msg_enable; /* debug level */

};



/* Per netvsc device */

struct netvsc_device {

	struct hv_device *dev;
@@ -667,6 +676,9 @@ struct netvsc_device { 
	struct multi_send_data msd[NR_CPUS];

	u32 max_pkt; /* max number of pkt in one send, e.g. 8 */

	u32 pkt_align; /* alignment bytes, e.g. 8 */



	/* The net device context */

	struct net_device_context *nd_ctx;

};



/* NdisInitialize message */

drivers/net/hyperv/netvsc.c

+3 −0
Original line number Diff line number Diff line
@@ -1197,6 +1197,9 @@ int netvsc_device_add(struct hv_device *device, void *additional_info) 
	 */

	ndev = net_device->ndev;



	/* Add netvsc_device context to netvsc_device */

	net_device->nd_ctx = netdev_priv(ndev);



	/* Initialize the NetVSC channel extension */

	init_completion(&net_device->channel_init_wait);

drivers/net/hyperv/netvsc_drv.c

+14 −6
Original line number Diff line number Diff line
@@ -40,18 +40,21 @@ 


#include "hyperv_net.h"



struct net_device_context {

	/* point back to our device context */

	struct hv_device *device_ctx;

	struct delayed_work dwork;

	struct work_struct work;

};



#define RING_SIZE_MIN 64

static int ring_size = 128;

module_param(ring_size, int, S_IRUGO);

MODULE_PARM_DESC(ring_size, "Ring buffer size (# of pages)");



static const u32 default_msg = NETIF_MSG_DRV | NETIF_MSG_PROBE |

				NETIF_MSG_LINK | NETIF_MSG_IFUP |

				NETIF_MSG_IFDOWN | NETIF_MSG_RX_ERR |

				NETIF_MSG_TX_ERR;



static int debug = -1;

module_param(debug, int, S_IRUGO);

MODULE_PARM_DESC(debug, "Debug level (0=none,...,16=all)");



static void do_set_multicast(struct work_struct *w)

{

	struct net_device_context *ndevctx =
@@ -888,6 +891,11 @@ static int netvsc_probe(struct hv_device *dev, 


	net_device_ctx = netdev_priv(net);

	net_device_ctx->device_ctx = dev;

	net_device_ctx->msg_enable = netif_msg_init(debug, default_msg);

	if (netif_msg_probe(net_device_ctx))

		netdev_dbg(net, "netvsc msg_enable: %d\n",

			   net_device_ctx->msg_enable);



	hv_set_drvdata(dev, net);

	INIT_DELAYED_WORK(&net_device_ctx->dwork, netvsc_link_change);

	INIT_WORK(&net_device_ctx->work, do_set_multicast);

drivers/net/hyperv/rndis_filter.c

+2 −1
Original line number Diff line number Diff line
@@ -429,6 +429,7 @@ int rndis_filter_receive(struct hv_device *dev, 


	rndis_msg = pkt->data;



	if (netif_msg_rx_err(net_dev->nd_ctx))

		dump_rndis_message(dev, rndis_msg);



	switch (rndis_msg->ndis_msg_type) {