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Date: Mon, 30 Jul 2007 15:56:06 +0300
From: Moni Shoua <monis@...taire.com>
To: rdreier@...co.com, davem@...emloft.net, fubar@...ibm.com
CC: netdev@...r.kernel.org, general@...ts.openfabrics.org
Subject: [PATCH V3 7/7] net/bonding: Delay sending of gratuitous ARP to avoid
failure
Delay sending a gratuitous_arp when LINK_STATE_LINKWATCH_PENDING bit
in dev->state field is on. This improves the chances for the arp packet to
be transmitted.
Signed-off-by: Moni Shoua <monis@...taire.com>
---
drivers/net/bonding/bond_main.c | 25 +++++++++++++++++++++----
drivers/net/bonding/bonding.h | 1 +
2 files changed, 22 insertions(+), 4 deletions(-)
Index: net-2.6/drivers/net/bonding/bond_main.c
===================================================================
--- net-2.6.orig/drivers/net/bonding/bond_main.c 2007-07-25 15:33:25.000000000 +0300
+++ net-2.6/drivers/net/bonding/bond_main.c 2007-07-26 18:42:59.296296622 +0300
@@ -1134,8 +1134,13 @@ void bond_change_active_slave(struct bon
if (new_active && !bond->do_set_mac_addr)
memcpy(bond->dev->dev_addr, new_active->dev->dev_addr,
new_active->dev->addr_len);
-
- bond_send_gratuitous_arp(bond);
+ if (bond->curr_active_slave &&
+ test_bit(__LINK_STATE_LINKWATCH_PENDING, &bond->curr_active_slave->dev->state)){
+ dprintk("delaying gratuitous arp on %s\n",bond->curr_active_slave->dev->name);
+ bond->send_grat_arp=1;
+ }else{
+ bond_send_gratuitous_arp(bond);
+ }
}
}
@@ -2120,6 +2125,15 @@ void bond_mii_monitor(struct net_device
* program could monitor the link itself if needed.
*/
+ if (bond->send_grat_arp) {
+ if (bond->curr_active_slave && test_bit(__LINK_STATE_LINKWATCH_PENDING, &bond->curr_active_slave->dev->state))
+ dprintk("Needs to send gratuitous arp but not yet\n",__FUNCTION__);
+ else {
+ dprintk("sending delayed gratuitous arp on ond->curr_active_slave->dev->name\n");
+ bond_send_gratuitous_arp(bond);
+ bond->send_grat_arp=0;
+ }
+ }
read_lock(&bond->curr_slave_lock);
oldcurrent = bond->curr_active_slave;
read_unlock(&bond->curr_slave_lock);
@@ -2513,6 +2527,7 @@ static void bond_send_gratuitous_arp(str
struct slave *slave = bond->curr_active_slave;
struct vlan_entry *vlan;
struct net_device *vlan_dev;
+ int i;
dprintk("bond_send_grat_arp: bond %s slave %s\n", bond->dev->name,
slave ? slave->dev->name : "NULL");
@@ -2520,8 +2535,9 @@ static void bond_send_gratuitous_arp(str
return;
if (bond->master_ip) {
- bond_arp_send(slave->dev, ARPOP_REPLY, bond->master_ip,
- bond->master_ip, 0);
+ for (i=0;i<3;i++)
+ bond_arp_send(slave->dev, ARPOP_REPLY, bond->master_ip,
+ bond->master_ip, 0);
}
list_for_each_entry(vlan, &bond->vlan_list, vlan_list) {
@@ -4331,6 +4347,7 @@ static int bond_init(struct net_device *
bond->current_arp_slave = NULL;
bond->primary_slave = NULL;
bond->dev = bond_dev;
+ bond->send_grat_arp=0;
INIT_LIST_HEAD(&bond->vlan_list);
/* Initialize the device entry points */
Index: net-2.6/drivers/net/bonding/bonding.h
===================================================================
--- net-2.6.orig/drivers/net/bonding/bonding.h 2007-07-25 15:20:10.000000000 +0300
+++ net-2.6/drivers/net/bonding/bonding.h 2007-07-26 18:42:43.652087660 +0300
@@ -203,6 +203,7 @@ struct bonding {
struct vlan_group *vlgrp;
struct packet_type arp_mon_pt;
s8 do_set_mac_addr;
+ int send_grat_arp;
};
/**
-
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