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Date: Tue, 10 Sep 2013 15:04:40 -0400
From: Neil Horman <nhorman@...driver.com>
To: Veaceslav Falico <vfalico@...hat.com>
Cc: netdev@...r.kernel.org, Neil Horman <nhorman@...hat.com>,
Jay Vosburgh <fubar@...ibm.com>,
Andy Gospodarek <andy@...yhouse.net>,
"David S. Miller" <davem@...emloft.net>
Subject: Re: bonding: Make alb learning packet interval configurable
On Tue, Sep 10, 2013 at 08:11:49PM +0200, Veaceslav Falico wrote:
> On Tue, Sep 10, 2013 at 10:14:50AM -0400, Neil Horman wrote:
> >From: Neil Horman <nhorman@...hat.com>
> >
> >running bonding in ALB mode requires that learning packets be sent periodically,
> >so that the switch knows where to send responding traffic. However, depending
> >on switch configuration, there may not be any need to send traffic at the
> >default rate of 3 packets per second, which represents little more than wasted
> >data. Allow the ALB learning packet interval to be made configurable via sysfs
> >
> >Signed-off-by: Neil Horman <nhorman@...driver.com>
> >CC: Jay Vosburgh <fubar@...ibm.com>
> >CC: Andy Gospodarek <andy@...yhouse.net>
> >CC: "David S. Miller" <davem@...emloft.net>
> >
> >---
> >drivers/net/bonding/bond_alb.c | 2 +-
> >drivers/net/bonding/bond_alb.h | 8 ++++----
> >drivers/net/bonding/bond_main.c | 1 +
> >drivers/net/bonding/bond_sysfs.c | 39 +++++++++++++++++++++++++++++++++++++++
> >drivers/net/bonding/bonding.h | 1 +
> >5 files changed, 46 insertions(+), 5 deletions(-)
>
> Maybe add some description about it to Documentation/networking/bonding.txt?
>
Crap, yes, you're right of course. Thanks. I'll respin with that added.
Thanks
Neil
> Otherwise seems good.
>
> >
> >diff --git a/drivers/net/bonding/bond_alb.c b/drivers/net/bonding/bond_alb.c
> >index 91f179d..f428ef57 100644
> >--- a/drivers/net/bonding/bond_alb.c
> >+++ b/drivers/net/bonding/bond_alb.c
> >@@ -1472,7 +1472,7 @@ void bond_alb_monitor(struct work_struct *work)
> > bond_info->lp_counter++;
> >
> > /* send learning packets */
> >- if (bond_info->lp_counter >= BOND_ALB_LP_TICKS) {
> >+ if (bond_info->lp_counter >= BOND_ALB_LP_TICKS(bond)) {
> > /* change of curr_active_slave involves swapping of mac addresses.
> > * in order to avoid this swapping from happening while
> > * sending the learning packets, the curr_slave_lock must be held for
> >diff --git a/drivers/net/bonding/bond_alb.h b/drivers/net/bonding/bond_alb.h
> >index 28d8e4c..e78fd9b 100644
> >--- a/drivers/net/bonding/bond_alb.h
> >+++ b/drivers/net/bonding/bond_alb.h
> >@@ -36,14 +36,14 @@ struct slave;
> > * Used for division - never set
> > * to zero !!!
> > */
> >-#define BOND_ALB_LP_INTERVAL 1 /* In seconds, periodic send of
> >- * learning packets to the switch
> >- */
> >+#define BOND_ALB_LP_INTERVAL(bond) (bond->params.lp_interval) /* In seconds, periodic send of
> >+ * learning packets to the switch
> >+ */
> >
> >#define BOND_TLB_REBALANCE_TICKS (BOND_TLB_REBALANCE_INTERVAL \
> > * ALB_TIMER_TICKS_PER_SEC)
> >
> >-#define BOND_ALB_LP_TICKS (BOND_ALB_LP_INTERVAL \
> >+#define BOND_ALB_LP_TICKS(bond) (BOND_ALB_LP_INTERVAL(bond) \
> > * ALB_TIMER_TICKS_PER_SEC)
> >
> >#define TLB_HASH_TABLE_SIZE 256 /* The size of the clients hash table.
> >diff --git a/drivers/net/bonding/bond_main.c b/drivers/net/bonding/bond_main.c
> >index 39e5b1c..b8c9ec3 100644
> >--- a/drivers/net/bonding/bond_main.c
> >+++ b/drivers/net/bonding/bond_main.c
> >@@ -4416,6 +4416,7 @@ static int bond_check_params(struct bond_params *params)
> > params->all_slaves_active = all_slaves_active;
> > params->resend_igmp = resend_igmp;
> > params->min_links = min_links;
> >+ params->lp_interval = 1;
> >
> > if (primary) {
> > strncpy(params->primary, primary, IFNAMSIZ);
> >diff --git a/drivers/net/bonding/bond_sysfs.c b/drivers/net/bonding/bond_sysfs.c
> >index ce46776..4532259 100644
> >--- a/drivers/net/bonding/bond_sysfs.c
> >+++ b/drivers/net/bonding/bond_sysfs.c
> >@@ -1680,6 +1680,44 @@ out:
> >static DEVICE_ATTR(resend_igmp, S_IRUGO | S_IWUSR,
> > bonding_show_resend_igmp, bonding_store_resend_igmp);
> >
> >+
> >+static ssize_t bonding_show_lp_interval(struct device *d,
> >+ struct device_attribute *attr,
> >+ char *buf)
> >+{
> >+ struct bonding *bond = to_bond(d);
> >+ return sprintf(buf, "%d\n", bond->params.lp_interval);
> >+}
> >+
> >+static ssize_t bonding_store_lp_interval(struct device *d,
> >+ struct device_attribute *attr,
> >+ const char *buf, size_t count)
> >+{
> >+ struct bonding *bond = to_bond(d);
> >+ int new_value, ret = count;
> >+
> >+ if (sscanf(buf, "%d", &new_value) != 1) {
> >+ pr_err("%s: no lp interval value specified.\n",
> >+ bond->dev->name);
> >+ ret = -EINVAL;
> >+ goto out;
> >+ }
> >+
> >+ if (new_value <= 0) {
> >+ pr_err ("%s: lp_interval must be between 1 and %d\n",
> >+ bond->dev->name, INT_MAX);
> >+ ret = -EINVAL;
> >+ goto out;
> >+ }
> >+
> >+ bond->params.lp_interval = new_value;
> >+out:
> >+ return ret;
> >+}
> >+
> >+static DEVICE_ATTR(lp_interval, S_IRUGO | S_IWUSR,
> >+ bonding_show_lp_interval, bonding_store_lp_interval);
> >+
> >static struct attribute *per_bond_attrs[] = {
> > &dev_attr_slaves.attr,
> > &dev_attr_mode.attr,
> >@@ -1710,6 +1748,7 @@ static struct attribute *per_bond_attrs[] = {
> > &dev_attr_all_slaves_active.attr,
> > &dev_attr_resend_igmp.attr,
> > &dev_attr_min_links.attr,
> >+ &dev_attr_lp_interval.attr,
> > NULL,
> >};
> >
> >diff --git a/drivers/net/bonding/bonding.h b/drivers/net/bonding/bonding.h
> >index f7ab161..4bd9d5b 100644
> >--- a/drivers/net/bonding/bonding.h
> >+++ b/drivers/net/bonding/bonding.h
> >@@ -176,6 +176,7 @@ struct bond_params {
> > int tx_queues;
> > int all_slaves_active;
> > int resend_igmp;
> >+ int lp_interval;
> >};
> >
> >struct bond_parm_tbl {
>
--
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