Gitweb: http://git.kernel.org/git/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=b63bb7...
Commit: b63bb739a1d24f395c09f88ff43c54c736a60453
Parent: 8e4b9329080b7c37e3dcf4a7c435657d4d0f4816
Author: David Sterba <dsterba@suse.cz>
AuthorDate: Thu Dec 6 23:40:33 2007 -0800
Committer: Jeff Garzik <jeff@garzik.org>
CommitDate: Fri Dec 7 15:00:30 2007 -0500
bonding: Fix time comparison
From: David Sterba <dsterba@suse.cz>
Use macros for comparing jiffies. Jiffies' wrap caused missed events and hangs.
Module reinsert was needed to make bonding work again.
Signed-off-by: David Sterba <dsterba@suse.cz>
Acked-by: Jay Vosburgh <fubar@us.ibm.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
---
drivers/net/bonding/bond_main.c | 25 +++++++++++++------------
1 files changed, 13 insertions(+), 12 deletions(-)
diff --git a/drivers/net/bonding/bond_main.c b/drivers/net/bonding/bond_main.c
index 423298c..e4a4714 100644
--- a/drivers/net/bonding/bond_main.c
+++ b/drivers/net/bonding/bond_main.c
@@ -74,6 +74,7 @@
#include <linux/ethtool.h>
#include <linux/if_vlan.h>
#include <linux/if_bonding.h>
+#include <linux/jiffies.h>
#include <net/route.h>
#include <net/net_namespace.h>
#include "bonding.h"
@@ -2722,8 +2723,8 @@ void bond_loadbalance_arp_mon(struct work_struct *work)
*/
bond_for_each_slave(bond, slave, i) {
if (slave->link != BOND_LINK_UP) {
- if (((jiffies - slave->dev->trans_start) <= delta_in_ticks) &&
- ((jiffies - slave->dev->last_rx) <= delta_in_ticks)) {
+ if (time_before_eq(jiffies, slave->dev->trans_start + delta_in_ticks) &&
+ time_before_eq(jiffies, slave->dev->last_rx + delta_in_ticks)) {
slave->link = BOND_LINK_UP;
slave->state = BOND_STATE_ACTIVE;
@@ -2754,8 +2755,8 @@ void bond_loadbalance_arp_mon(struct work_struct *work)
* when the source ip is 0, so don't take the link down
* if we don't know our ip yet
*/
- if (((jiffies - slave->dev->trans_start) >= (2*delta_in_ticks)) ||
- (((jiffies - slave->dev->last_rx) >= (2*delta_in_ticks)) &&
+ if (time_after_eq(jiffies, slave->dev->trans_start + 2*delta_in_ticks) ||
+ (time_after_eq(jiffies, slave->dev->last_rx + 2*delta_in_ticks) &&
bond_has_ip(bond))) {
slave->link = BOND_LINK_DOWN;
@@ -2848,8 +2849,8 @@ void bond_activebackup_arp_mon(struct work_struct *work)
*/
bond_for_each_slave(bond, slave, i) {
if (slave->link != BOND_LINK_UP) {
- if ((jiffies - slave_last_rx(bond, slave)) <=
- delta_in_ticks) {
+ if (time_before_eq(jiffies,
+ slave_last_rx(bond, slave) + delta_in_ticks)) {
slave->link = BOND_LINK_UP;
@@ -2858,7 +2859,7 @@ void bond_activebackup_arp_mon(struct work_struct *work)
write_lock_bh(&bond->curr_slave_lock);
if ((!bond->curr_active_slave) &&
- ((jiffies - slave->dev->trans_start) <= delta_in_ticks)) {
+ time_before_eq(jiffies, slave->dev->trans_start + delta_in_ticks)) {
bond_change_active_slave(bond, slave);
bond->current_arp_slave = NULL;
} else if (bond->curr_active_slave != slave) {
@@ -2897,7 +2898,7 @@ void bond_activebackup_arp_mon(struct work_struct *work)
if ((slave != bond->curr_active_slave) &&
(!bond->current_arp_slave) &&
- (((jiffies - slave_last_rx(bond, slave)) >= 3*delta_in_ticks) &&
+ (time_after_eq(jiffies, slave_last_rx(bond, slave) + 3*delta_in_ticks) &&
bond_has_ip(bond))) {
/* a backup slave has gone down; three times
* the delta allows the current slave to be
@@ -2943,10 +2944,10 @@ void bond_activebackup_arp_mon(struct work_struct *work)
* before being taken out. if a primary is being used, check
* if it is up and needs to take over as the curr_active_slave
*/
- if ((((jiffies - slave->dev->trans_start) >= (2*delta_in_ticks)) ||
- (((jiffies - slave_last_rx(bond, slave)) >= (2*delta_in_ticks)) &&
- bond_has_ip(bond))) &&
- ((jiffies - slave->jiffies) >= 2*delta_in_ticks)) {
+ if ((time_after_eq(jiffies, slave->dev->trans_start + 2*delta_in_ticks) ||
+ (time_after_eq(jiffies, slave_last_rx(bond, slave) + 2*delta_in_ticks) &&
+ bond_has_ip(bond))) &&
+ time_after_eq(jiffies, slave->jiffies + 2*delta_in_ticks)) {
slave->link = BOND_LINK_DOWN;
-
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