[v2] bonding: unset primary slave via sysfs

Submitted by Milos Vyletel on Jan. 29, 2013, 7:59 p.m.

Details

Message ID 1359489540-14620-1-git-send-email-milos.vyletel@sde.cz
State Accepted
Delegated to: David Miller
Headers show

Commit Message

Milos Vyletel Jan. 29, 2013, 7:59 p.m.
When bonding module is loaded with primary parameter and one decides to unset
primary slave using sysfs these settings are not preserved during bond device
restart. Primary slave is only unset once and it's not remembered in
bond->params structure. Below is example of recreation.

 grep OPTS /etc/sysconfig/network-scripts/ifcfg-bond0
BONDING_OPTS="mode=active-backup miimon=100 primary=eth01"
 grep "Primary Slave" /proc/net/bonding/bond0
Primary Slave: eth01 (primary_reselect always)

 echo "" > /sys/class/net/bond0/bonding/primary
 grep "Primary Slave" /proc/net/bonding/bond0
Primary Slave: None

 sed -i -e 's/primary=eth01//' /etc/sysconfig/network-scripts/ifcfg-bond0
 grep OPTS /etc/sysconfig/network-scripts/ifcfg-bond
BONDING_OPTS="mode=active-backup miimon=100 "
 ifdown bond0 && ifup bond0

without patch:
 grep "Primary Slave" /proc/net/bonding/bond0
Primary Slave: eth01 (primary_reselect always)

with patch:
 grep "Primary Slave" /proc/net/bonding/bond0
Primary Slave: None

Reviewed-by: Jiri Pirko <jiri@resnulli.us>
Signed-off-by: Milos Vyletel <milos.vyletel@sde.cz>
Signed-off-by: Jay Vosburgh <fubar@us.ibm.com>
---
 drivers/net/bonding/bond_sysfs.c |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)

Comments

David Miller Jan. 29, 2013, 8:47 p.m.
From: Milos Vyletel <milos.vyletel@sde.cz>
Date: Tue, 29 Jan 2013 14:59:00 -0500

> When bonding module is loaded with primary parameter and one decides to unset
> primary slave using sysfs these settings are not preserved during bond device
> restart. Primary slave is only unset once and it's not remembered in
> bond->params structure. Below is example of recreation.
 ...
> 
> Reviewed-by: Jiri Pirko <jiri@resnulli.us>
> Signed-off-by: Milos Vyletel <milos.vyletel@sde.cz>
> Signed-off-by: Jay Vosburgh <fubar@us.ibm.com>

Applied.
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diff --git a/drivers/net/bonding/bond_sysfs.c b/drivers/net/bonding/bond_sysfs.c
index ef8d2a0..155f3b4 100644
--- a/drivers/net/bonding/bond_sysfs.c
+++ b/drivers/net/bonding/bond_sysfs.c
@@ -1067,6 +1067,7 @@  static ssize_t bonding_store_primary(struct device *d,
 		pr_info("%s: Setting primary slave to None.\n",
 			bond->dev->name);
 		bond->primary_slave = NULL;
+		memset(bond->params.primary, 0, sizeof(bond->params.primary));
 		bond_select_active_slave(bond);
 		goto out;
 	}