netdev - RE: [PATCH NET-NEXT V2] netxen: fix ethtool rx_dropped information in ethtool get_ethtool

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Date:	Wed, 9 Jul 2014 11:32:38 +0000
From:	Manish Chopra <manish.chopra@...gic.com>
To:	ethan zhao <ethan.zhao@...cle.com>,
	David Miller <davem@...emloft.net>
CC:	"balbi@...com" <balbi@...com>, netdev <netdev@...r.kernel.org>,
	linux-kernel <linux-kernel@...r.kernel.org>,
	"sriharsha.devdas@...cle.com" <sriharsha.devdas@...cle.com>,
	"ethan.kernel@...il.com" <ethan.kernel@...il.com>,
	vaughan <vaughan.cao@...cle.com>
Subject: RE: [PATCH NET-NEXT V2] netxen: fix ethtool rx_dropped information
 in ethtool get_ethtool_stats()

>-----Original Message-----
>From: netdev-owner@...r.kernel.org [mailto:netdev-owner@...r.kernel.org]
>On Behalf Of ethan zhao
>Sent: Wednesday, July 09, 2014 8:11 AM
>To: David Miller
>Cc: balbi@...com; netdev; linux-kernel; sriharsha.devdas@...cle.com;
>ethan.kernel@...il.com; vaughan
>Subject: Re: [PATCH NET-NEXT V2] netxen: fix ethtool rx_dropped information in
>ethtool get_ethtool_stats()
>
>David,
>
>    Please help to review and confirm this patch.
>
>Thanks,
>Ethan
>
>On 2014/7/8 21:57, Ethan Zhao wrote:
>> netxen driver has implemented netxen_nic_get_ethtool_stats()
>> interface, but it doesn't collect stats.rxdropped in driver, so we
>> will get different rx_dropped statistic information while using ifconfig and
>ethtool.
>> this patch fills stats.rxdropped field with data from net core with
>> dev_get_stats() just as ixgbe driver did for some of its stats.
>>
>> V2: only fix the stats.rxdropped field.
>>
>> Tested with last netxen 4.0.82
>> Compiled with net-next branch 3.16-rc2
>>
>> Signed-off-by: Ethan Zhao <ethan.zhao@...cle.com>
>> Tested-by: Sriharsha Yadagudde <sriharsha.devdas@...cle.com>
>> ---
>>   .../ethernet/qlogic/netxen/netxen_nic_ethtool.c    |   34 +++++++++++++++++-
>--
>>   1 files changed, 29 insertions(+), 5 deletions(-)
>>
>> diff --git a/drivers/net/ethernet/qlogic/netxen/netxen_nic_ethtool.c
>> b/drivers/net/ethernet/qlogic/netxen/netxen_nic_ethtool.c
>> index 4ca2c19..49e6a1b 100644
>> --- a/drivers/net/ethernet/qlogic/netxen/netxen_nic_ethtool.c
>> +++ b/drivers/net/ethernet/qlogic/netxen/netxen_nic_ethtool.c
>> @@ -33,22 +33,30 @@
>>   #include "netxen_nic.h"
>>   #include "netxen_nic_hw.h"
>>
>> +enum {NETDEV_STATS, NETXEN_STATS};
>> +
>>   struct netxen_nic_stats {
>>   	char stat_string[ETH_GSTRING_LEN];
>> +	int type;
>>   	int sizeof_stat;
>>   	int stat_offset;
>>   };
>>
>> -#define NETXEN_NIC_STAT(m) sizeof(((struct netxen_adapter *)0)->m), \
>> +#define NETXEN_NIC_STAT(m)	NETXEN_STATS, \
>> +			sizeof(((struct netxen_adapter *)0)->m), \
>>   			offsetof(struct netxen_adapter, m)
>>
>> +#define NETXEN_NETDEV_STAT(m)	NETDEV_STATS, \
>> +			sizeof(((struct rtnl_link_stats64 *)0)->m), \
>> +			offsetof(struct rtnl_link_stats64, m)
>> +
>>   #define NETXEN_NIC_PORT_WINDOW 0x10000
>>   #define NETXEN_NIC_INVALID_DATA 0xDEADBEEF
>>
>>   static const struct netxen_nic_stats netxen_nic_gstrings_stats[] = {
>>   	{"xmit_called", NETXEN_NIC_STAT(stats.xmitcalled)},
>>   	{"xmit_finished", NETXEN_NIC_STAT(stats.xmitfinished)},
>> -	{"rx_dropped", NETXEN_NIC_STAT(stats.rxdropped)},
>> +	{"rx_dropped", NETXEN_NETDEV_STAT(rx_dropped)},
>>   	{"tx_dropped", NETXEN_NIC_STAT(stats.txdropped)},
>>   	{"csummed", NETXEN_NIC_STAT(stats.csummed)},
>>   	{"rx_pkts", NETXEN_NIC_STAT(stats.rx_pkts)}, @@ -679,11 +687,27 @@
>> netxen_nic_get_ethtool_stats(struct net_device *dev,
>>   {
>>   	struct netxen_adapter *adapter = netdev_priv(dev);
>>   	int index;
>> +	struct rtnl_link_stats64 temp;
>> +	const struct rtnl_link_stats64 *net_stats;
>> +	char *p = NULL;
>>
>> +	net_stats = dev_get_stats(dev, &temp);
>>   	for (index = 0; index < NETXEN_NIC_STATS_LEN; index++) {
>> -		char *p =
>> -		    (char *)adapter +
>> -		    netxen_nic_gstrings_stats[index].stat_offset;
>> +
>> +		switch (netxen_nic_gstrings_stats[index].type) {
>> +		case NETDEV_STATS:
>> +			p = (char *)net_stats +
>> +				netxen_nic_gstrings_stats[index].stat_offset;
>> +			break;
>> +		case NETXEN_STATS:
>> +			p = (char *)adapter +
>> +				netxen_nic_gstrings_stats[index].stat_offset;
>> +			break;
>> +		default:
>> +			data[index] = 0;
>> +			continue;
>> +		}
>> +
>>   		data[index] =
>>   		    (netxen_nic_gstrings_stats[index].sizeof_stat ==
>>   		     sizeof(u64)) ? *(u64 *) p : *(u32 *) p;

Ethan, I can't download this patch as I don’t see it in netdev patchwork. Just looking at the diff I think there is style issue with macro definition of NETXEN_NIC_STAT and NETXEN_NETDEV_STAT.
Enclose macro definition in parentheses as they are containing complex values.

Send this patch targeted for net instead of net-next being a bug fix. Please also run checkpatch.pl to correct any style warning/errors in the patch.

Thanks!!