netdev - Re: [patch net-next-2.6] bonding: allow resetting slave failure counters

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Date:	Wed, 1 Jun 2011 15:53:21 +0200
From:	Jiri Pirko <jpirko@...hat.com>
To:	Flavio Leitner <fbl@...hat.com>
Cc:	netdev@...r.kernel.org, davem@...emloft.net, fubar@...ibm.com,
	andy@...yhouse.net
Subject: Re: [patch net-next-2.6] bonding: allow resetting slave failure
 counters

Wed, Jun 01, 2011 at 03:28:37PM CEST, fbl@...hat.com wrote:
>On 06/01/2011 06:40 AM, Jiri Pirko wrote:
>> This patch allows to reset failure counters for all enslaved devices.
>> 
>> Signed-off-by: Jiri Pirko <jpirko@...hat.com>
>> ---
>>  Documentation/networking/bonding.txt |    7 +++++++
>>  drivers/net/bonding/bond_sysfs.c     |   27 +++++++++++++++++++++++++++
>>  2 files changed, 34 insertions(+), 0 deletions(-)
>> 
>> diff --git a/Documentation/networking/bonding.txt b/Documentation/networking/bonding.txt
>> index 675612f..2f51d73 100644
>> --- a/Documentation/networking/bonding.txt
>> +++ b/Documentation/networking/bonding.txt
>> @@ -782,6 +782,13 @@ resend_igmp
>>  
>>  	This option was added for bonding version 3.7.0.
>>  
>> +reset_failure_counters
>> +
>> +	This write-only control file will zero failure counters for
>> +	all slaves.  Note there is no appropriate module parameter for this
>> +	since it would not make much sense.
>> +	Write any value to perform reset.
>
>nit: many options mention when they were added.
>i.e. This option was added for bonding version 3.7.1

hmm, is that necessary Jay, Andy?

/me thinks this versioning should be removed at all in the first place...

>
>fbl
>
>>  3. Configuring Bonding Devices
>>  ==============================
>>  
>> diff --git a/drivers/net/bonding/bond_sysfs.c b/drivers/net/bonding/bond_sysfs.c
>> index 88fcb25..9b45164 100644
>> --- a/drivers/net/bonding/bond_sysfs.c
>> +++ b/drivers/net/bonding/bond_sysfs.c
>> @@ -1572,6 +1572,32 @@ out:
>>  static DEVICE_ATTR(resend_igmp, S_IRUGO | S_IWUSR,
>>  		   bonding_show_resend_igmp, bonding_store_resend_igmp);
>>  
>> +static ssize_t
>> +bonding_store_reset_failure_counters(struct device *d,
>> +				     struct device_attribute *attr,
>> +				     const char *buf, size_t count)
>> +{
>> +	struct slave *slave;
>> +	int i;
>> +	struct bonding *bond = to_bond(d);
>> +
>> +	if (!rtnl_trylock())
>> +		return restart_syscall();
>> +
>> +	read_lock(&bond->lock);
>> +	pr_info("%s: Resetting counters.\n", bond->dev->name);
>> +	bond_for_each_slave(bond, slave, i)
>> +		slave->link_failure_count = 0;
>> +	read_unlock(&bond->lock);
>> +
>> +	rtnl_unlock();
>> +
>> +	return count;
>> +}
>> +
>> +static DEVICE_ATTR(reset_failure_counters, S_IWUSR, NULL,
>> +		   bonding_store_reset_failure_counters);
>> +
>>  static struct attribute *per_bond_attrs[] = {
>>  	&dev_attr_slaves.attr,
>>  	&dev_attr_mode.attr,
>> @@ -1600,6 +1626,7 @@ static struct attribute *per_bond_attrs[] = {
>>  	&dev_attr_queue_id.attr,
>>  	&dev_attr_all_slaves_active.attr,
>>  	&dev_attr_resend_igmp.attr,
>> +	&dev_attr_reset_failure_counters.attr,
>>  	NULL,
>>  };
>>  
>
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