From: Jiri Bohac <[email protected]>
3.12-stable review patch. If anyone has any objections, please let me know.
===============
[ Upstream commit 163c8ff30dbe473abfbb24a7eac5536c87f3baa9 ]
aggregator_identifier is used to assign unique aggregator identifiers
to aggregators of a bond during device enslaving.
aggregator_identifier is currently a global variable that is zeroed in
bond_3ad_initialize().
This sequence will lead to duplicate aggregator identifiers for eth1 and eth3:
create bond0
change bond0 mode to 802.3ad
enslave eth0 to bond0 //eth0 gets agg id 1
enslave eth1 to bond0 //eth1 gets agg id 2
create bond1
change bond1 mode to 802.3ad
enslave eth2 to bond1 //aggregator_identifier is reset to 0
//eth2 gets agg id 1
enslave eth3 to bond0 //eth3 gets agg id 2
Fix this by making aggregator_identifier private to the bond.
Signed-off-by: Jiri Bohac <[email protected]>
Acked-by: Veaceslav Falico <[email protected]>
Signed-off-by: David S. Miller <[email protected]>
Signed-off-by: Jiri Slaby <[email protected]>
---
drivers/net/bonding/bond_3ad.c | 6 ++----
drivers/net/bonding/bond_3ad.h | 1 +
2 files changed, 3 insertions(+), 4 deletions(-)
diff --git a/drivers/net/bonding/bond_3ad.c b/drivers/net/bonding/bond_3ad.c
index 0d8f427ade93..b3c22527b938 100644
--- a/drivers/net/bonding/bond_3ad.c
+++ b/drivers/net/bonding/bond_3ad.c
@@ -1861,8 +1861,6 @@ void bond_3ad_initiate_agg_selection(struct bonding
*bond, int timeout)
BOND_AD_INFO(bond).agg_select_timer = timeout;
}
-static u16 aggregator_identifier;
-
/**
* bond_3ad_initialize - initialize a bond's 802.3ad parameters and structures
* @bond: bonding struct to work on
@@ -1876,7 +1874,7 @@ void bond_3ad_initialize(struct bonding *bond, u16
tick_resolution)
if (MAC_ADDRESS_COMPARE(&(BOND_AD_INFO(bond).system.sys_mac_addr),
bond->dev->dev_addr)) {
- aggregator_identifier = 0;
+ BOND_AD_INFO(bond).aggregator_identifier = 0;
BOND_AD_INFO(bond).system.sys_priority = 0xFFFF;
BOND_AD_INFO(bond).system.sys_mac_addr = *((struct mac_addr
*)bond->dev->dev_addr);
@@ -1947,7 +1945,7 @@ int bond_3ad_bind_slave(struct slave *slave)
ad_initialize_agg(aggregator);
aggregator->aggregator_mac_address = *((struct mac_addr
*)bond->dev->dev_addr);
- aggregator->aggregator_identifier = (++aggregator_identifier);
+ aggregator->aggregator_identifier =
++BOND_AD_INFO(bond).aggregator_identifier;
aggregator->slave = slave;
aggregator->is_active = 0;
aggregator->num_of_ports = 0;
diff --git a/drivers/net/bonding/bond_3ad.h b/drivers/net/bonding/bond_3ad.h
index 5d91ad0cc041..1f081c89753f 100644
--- a/drivers/net/bonding/bond_3ad.h
+++ b/drivers/net/bonding/bond_3ad.h
@@ -253,6 +253,7 @@ struct ad_system {
struct ad_bond_info {
struct ad_system system; /* 802.3ad system structure */
u32 agg_select_timer; // Timer to select aggregator after all
adapter's hand shakes
+ u16 aggregator_identifier;
};
struct ad_slave_info {
--
1.9.0
--
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