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Date: Tue, 1 Nov 2011 11:20:48 +0800
From: Weiping Pan <wpan@...hat.com>
To: netdev@...r.kernel.org
Cc: fubar@...ibm.com, andy@...yhouse.net, linux-kernel@...r.kernel.org,
Weiping Pan <wpan@...hat.com>
Subject: [PATCH] bonding:update speed/duplex for NETDEV_CHANGE
Zheng Liang(lzheng@...hat.com) found a bug that if we config bonding with
arp monitor, sometimes bonding driver cannot get the speed and duplex from
its slaves, it will assume them to be 100Mb/sec and Full, please see
/proc/net/bonding/bond0.
But there is no such problem when uses miimon.
(Take igb for example)
I find that the reason is that after dev_open() in bond_enslave(),
bond_update_speed_duplex() will call igb_get_settings()
, but in that function,
it runs ethtool_cmd_speed_set(ecmd, -1); ecmd->duplex = -1;
because igb get an error value of status.
So even dev_open() is called, but the device is not really ready to get its
settings.
Maybe it is safe for us to call igb_get_settings() only after
this message shows up, that is "igb: p4p1 NIC Link is Up 1000 Mbps Full Duplex,
Flow Control: RX".
So I prefer to update the speed and duplex for a slave when reseices
NETDEV_CHANGE/NETDEV_UP event.
Changelog
V2:
1 remove the "fake 100/Full" logic in bond_update_speed_duplex(),
set speed and duplex to -1 when it gets error value of speed and duplex.
2 delete the warning in bond_enslave() if bond_update_speed_duplex() returns
error.
3 make bond_info_show_slave() handle bad values of speed and duplex.
Signed-off-by: Weiping Pan <wpan@...hat.com>
---
drivers/net/bonding/bond_main.c | 37 ++++++++++++-------------------------
drivers/net/bonding/bond_procfs.c | 12 ++++++++++--
2 files changed, 22 insertions(+), 27 deletions(-)
diff --git a/drivers/net/bonding/bond_main.c b/drivers/net/bonding/bond_main.c
index c34cc1e..b2b9109 100644
--- a/drivers/net/bonding/bond_main.c
+++ b/drivers/net/bonding/bond_main.c
@@ -550,7 +550,7 @@ down:
/*
* Get link speed and duplex from the slave's base driver
* using ethtool. If for some reason the call fails or the
- * values are invalid, fake speed and duplex to 100/Full
+ * values are invalid, set speed and duplex to -1,
* and return error.
*/
static int bond_update_speed_duplex(struct slave *slave)
@@ -560,9 +560,8 @@ static int bond_update_speed_duplex(struct slave *slave)
u32 slave_speed;
int res;
- /* Fake speed and duplex */
- slave->speed = SPEED_100;
- slave->duplex = DUPLEX_FULL;
+ slave->speed = -1;
+ slave->duplex = -1;
res = __ethtool_get_settings(slave_dev, &ecmd);
if (res < 0)
@@ -1751,16 +1750,7 @@ int bond_enslave(struct net_device *bond_dev, struct net_device *slave_dev)
new_slave->link = BOND_LINK_DOWN;
}
- if (bond_update_speed_duplex(new_slave) &&
- (new_slave->link != BOND_LINK_DOWN)) {
- pr_warning("%s: Warning: failed to get speed and duplex from %s, assumed to be 100Mb/sec and Full.\n",
- bond_dev->name, new_slave->dev->name);
-
- if (bond->params.mode == BOND_MODE_8023AD) {
- pr_warning("%s: Warning: Operation of 802.3ad mode requires ETHTOOL support in base driver for proper aggregator selection.\n",
- bond_dev->name);
- }
- }
+ bond_update_speed_duplex(new_slave);
if (USES_PRIMARY(bond->params.mode) && bond->params.primary[0]) {
/* if there is a primary slave, remember it */
@@ -3220,6 +3210,7 @@ static int bond_slave_netdev_event(unsigned long event,
{
struct net_device *bond_dev = slave_dev->master;
struct bonding *bond = netdev_priv(bond_dev);
+ struct slave *slave = NULL;
switch (event) {
case NETDEV_UNREGISTER:
@@ -3230,20 +3221,16 @@ static int bond_slave_netdev_event(unsigned long event,
bond_release(bond_dev, slave_dev);
}
break;
+ case NETDEV_UP:
case NETDEV_CHANGE:
- if (bond->params.mode == BOND_MODE_8023AD || bond_is_lb(bond)) {
- struct slave *slave;
+ slave = bond_get_slave_by_dev(bond, slave_dev);
+ if (slave) {
+ u32 old_speed = slave->speed;
+ u8 old_duplex = slave->duplex;
- slave = bond_get_slave_by_dev(bond, slave_dev);
- if (slave) {
- u32 old_speed = slave->speed;
- u8 old_duplex = slave->duplex;
-
- bond_update_speed_duplex(slave);
-
- if (bond_is_lb(bond))
- break;
+ bond_update_speed_duplex(slave);
+ if (bond->params.mode == BOND_MODE_8023AD) {
if (old_speed != slave->speed)
bond_3ad_adapter_speed_changed(slave);
if (old_duplex != slave->duplex)
diff --git a/drivers/net/bonding/bond_procfs.c b/drivers/net/bonding/bond_procfs.c
index 95de93b..d2ff52e 100644
--- a/drivers/net/bonding/bond_procfs.c
+++ b/drivers/net/bonding/bond_procfs.c
@@ -157,8 +157,16 @@ static void bond_info_show_slave(struct seq_file *seq,
seq_printf(seq, "\nSlave Interface: %s\n", slave->dev->name);
seq_printf(seq, "MII Status: %s\n",
(slave->link == BOND_LINK_UP) ? "up" : "down");
- seq_printf(seq, "Speed: %d Mbps\n", slave->speed);
- seq_printf(seq, "Duplex: %s\n", slave->duplex ? "full" : "half");
+ if (slave->speed == -1)
+ seq_printf(seq, "Speed: %s\n", "Unknown");
+ else
+ seq_printf(seq, "Speed: %d Mbps\n", slave->speed);
+
+ if (slave->duplex == -1)
+ seq_printf(seq, "Duplex: %s\n", "Unknown");
+ else
+ seq_printf(seq, "Duplex: %s\n", slave->duplex ? "full" : "half");
+
seq_printf(seq, "Link Failure Count: %u\n",
slave->link_failure_count);
--
1.7.4
--
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