From 3f300ff41d89fe9674b8dbab950ba2572639ee8d Mon Sep 17 00:00:00 2001 From: Simon Xiao Date: Tue, 28 Apr 2015 01:05:17 -0700 Subject: 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: Simon Xiao Reviewed-by: K. Y. Srinivasan Reviewed-by: Haiyang Zhang Signed-off-by: David S. Miller --- drivers/net/hyperv/hyperv_net.h | 12 ++++++++++++ drivers/net/hyperv/netvsc.c | 3 +++ drivers/net/hyperv/netvsc_drv.c | 20 ++++++++++++++------ drivers/net/hyperv/rndis_filter.c | 3 ++- 4 files changed, 31 insertions(+), 7 deletions(-) diff --git a/drivers/net/hyperv/hyperv_net.h b/drivers/net/hyperv/hyperv_net.h index a10b31664709..e55c8f4f55ef 100644 --- a/drivers/net/hyperv/hyperv_net.h +++ b/drivers/net/hyperv/hyperv_net.h @@ -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 */ diff --git a/drivers/net/hyperv/netvsc.c b/drivers/net/hyperv/netvsc.c index 2e8ad0636b46..c651d4d8b747 100644 --- a/drivers/net/hyperv/netvsc.c +++ b/drivers/net/hyperv/netvsc.c @@ -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); diff --git a/drivers/net/hyperv/netvsc_drv.c b/drivers/net/hyperv/netvsc_drv.c index a3a9d3898a6e..66c4b0c8d108 100644 --- a/drivers/net/hyperv/netvsc_drv.c +++ b/drivers/net/hyperv/netvsc_drv.c @@ -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); diff --git a/drivers/net/hyperv/rndis_filter.c b/drivers/net/hyperv/rndis_filter.c index 0d92efefd796..9118cea91882 100644 --- a/drivers/net/hyperv/rndis_filter.c +++ b/drivers/net/hyperv/rndis_filter.c @@ -429,7 +429,8 @@ int rndis_filter_receive(struct hv_device *dev, rndis_msg = pkt->data; - dump_rndis_message(dev, rndis_msg); + if (netif_msg_rx_err(net_dev->nd_ctx)) + dump_rndis_message(dev, rndis_msg); switch (rndis_msg->ndis_msg_type) { case RNDIS_MSG_PACKET: -- cgit v1.2.3