RE: [PATCH NET-NEXT V2] netxen: fix ethtool rx_dropped information in ethtool get_ethtool_stats()

From: Manish Chopra
Date: Wed Jul 09 2014 - 07:32:48 EST


>-----Original Message-----
>From: netdev-owner@xxxxxxxxxxxxxxx [mailto:netdev-owner@xxxxxxxxxxxxxxx]
>On Behalf Of ethan zhao
>Sent: Wednesday, July 09, 2014 8:11 AM
>To: David Miller
>Cc: balbi@xxxxxx; netdev; linux-kernel; sriharsha.devdas@xxxxxxxxxx;
>ethan.kernel@xxxxxxxxx; 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@xxxxxxxxxx>
>> Tested-by: Sriharsha Yadagudde <sriharsha.devdas@xxxxxxxxxx>
>> ---
>> .../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 donât 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!!