[PATCH V6 0/9] net/bonding: ADD IPoIB support for the bonding driver

[PATCH V6 0/9] net/bonding: ADD IPoIB support for the bonding driver

[Moni Shoua]

This patch series is the sixth version (see below link to V5) of the 
suggested changes to the bonding driver so it would be able to support 
non ARPHRD_ETHER netdevices for its High-Availability (active-backup) mode. 

Patches 1-8 were originally submitted in V5 and patch 9 is an addition by Jay.


Major changes from the previous version:
----------------------------------------

1. Remove the patches to net/core. Bonding will use the NETDEV_GOING_DOWN notification
   instead of NETDEV_CHANGE+IFF_SLAVE_DETACH. This reduces the amount of patches from 11
   to 9.

Links to earlier discussion:
----------------------------

1. A discussion in netdev about bonding support for IPoIB.
http://lists.openwall.net/netdev/2006/11/30/46

2. V5 series
http://lists.openfabrics.org/pipermail/general/2007-September/040996.html

[ofa-general] [PATCH V6 1/9] IB/ipoib: Bound the net device to the ipoib_neigh structue

[Moni Shoua]

IPoIB uses a two layer neighboring scheme, such that for each struct neighbour
whose device is an ipoib one, there is a struct ipoib_neigh buddy which is
created on demand at the tx flow by an ipoib_neigh_alloc(skb->dst->neighbour)
call.

When using the bonding driver, neighbours are created by the net stack on behalf
of the bonding (master) device. On the tx flow the bonding code gets an skb such
that skb->dev points to the master device, it changes this skb to point on the
slave device and calls the slave hard_start_xmit function.

Under this scheme, ipoib_neigh_destructor assumption that for each struct
neighbour it gets, n->dev is an ipoib device and hence netdev_priv(n->dev)
can be casted to struct ipoib_dev_priv is buggy.

To fix it, this patch adds a dev field to struct ipoib_neigh which is used
instead of the struct neighbour dev one, when n->dev->flags has the
IFF_MASTER bit set.

Signed-off-by: Moni Shoua <monis at voltaire.com>
Signed-off-by: Or Gerlitz <ogerlitz at voltaire.com>
---
 drivers/infiniband/ulp/ipoib/ipoib.h           |    4 +++-
 drivers/infiniband/ulp/ipoib/ipoib_main.c      |   24 +++++++++++++++---------
 drivers/infiniband/ulp/ipoib/ipoib_multicast.c |    3 ++-
 3 files changed, 20 insertions(+), 11 deletions(-)

Index: net-2.6/drivers/infiniband/ulp/ipoib/ipoib.h
===================================================================
--- net-2.6.orig/drivers/infiniband/ulp/ipoib/ipoib.h	2007-09-18 17:08:53.245849217 +0200
+++ net-2.6/drivers/infiniband/ulp/ipoib/ipoib.h	2007-09-18 17:09:26.534874404 +0200
@@ -328,6 +328,7 @@ struct ipoib_neigh {
 	struct sk_buff_head queue;
 
 	struct neighbour   *neighbour;
+	struct net_device *dev;
 
 	struct list_head    list;
 };
@@ -344,7 +345,8 @@ static inline struct ipoib_neigh **to_ip
 				     INFINIBAND_ALEN, sizeof(void *));
 }
 
-struct ipoib_neigh *ipoib_neigh_alloc(struct neighbour *neigh);
+struct ipoib_neigh *ipoib_neigh_alloc(struct neighbour *neigh,
+				      struct net_device *dev);
 void ipoib_neigh_free(struct net_device *dev, struct ipoib_neigh *neigh);
 
 extern struct workqueue_struct *ipoib_workqueue;
Index: net-2.6/drivers/infiniband/ulp/ipoib/ipoib_main.c
===================================================================
--- net-2.6.orig/drivers/infiniband/ulp/ipoib/ipoib_main.c	2007-09-18 17:08:53.245849217 +0200
+++ net-2.6/drivers/infiniband/ulp/ipoib/ipoib_main.c	2007-09-18 17:23:54.725744661 +0200
@@ -511,7 +511,7 @@ static void neigh_add_path(struct sk_buf
 	struct ipoib_path *path;
 	struct ipoib_neigh *neigh;
 
-	neigh = ipoib_neigh_alloc(skb->dst->neighbour);
+	neigh = ipoib_neigh_alloc(skb->dst->neighbour, skb->dev);
 	if (!neigh) {
 		++priv->stats.tx_dropped;
 		dev_kfree_skb_any(skb);
@@ -830,6 +830,13 @@ static void ipoib_neigh_cleanup(struct n
 	unsigned long flags;
 	struct ipoib_ah *ah = NULL;
 
+	neigh = *to_ipoib_neigh(n);
+	if (neigh) {
+		priv = netdev_priv(neigh->dev);
+		ipoib_dbg(priv, "neigh_destructor for bonding device: %s\n",
+			  n->dev->name);
+	} else
+		return;
 	ipoib_dbg(priv,
 		  "neigh_cleanup for %06x " IPOIB_GID_FMT "\n",
 		  IPOIB_QPN(n->ha),
@@ -837,13 +844,10 @@ static void ipoib_neigh_cleanup(struct n
 
 	spin_lock_irqsave(&priv->lock, flags);
 
-	neigh = *to_ipoib_neigh(n);
-	if (neigh) {
-		if (neigh->ah)
-			ah = neigh->ah;
-		list_del(&neigh->list);
-		ipoib_neigh_free(n->dev, neigh);
-	}
+	if (neigh->ah)
+		ah = neigh->ah;
+	list_del(&neigh->list);
+	ipoib_neigh_free(n->dev, neigh);
 
 	spin_unlock_irqrestore(&priv->lock, flags);
 
@@ -851,7 +855,8 @@ static void ipoib_neigh_cleanup(struct n
 		ipoib_put_ah(ah);
 }
 
-struct ipoib_neigh *ipoib_neigh_alloc(struct neighbour *neighbour)
+struct ipoib_neigh *ipoib_neigh_alloc(struct neighbour *neighbour,
+				      struct net_device *dev)
 {
 	struct ipoib_neigh *neigh;
 
@@ -860,6 +865,7 @@ struct ipoib_neigh *ipoib_neigh_alloc(st
 		return NULL;
 
 	neigh->neighbour = neighbour;
+	neigh->dev = dev;
 	*to_ipoib_neigh(neighbour) = neigh;
 	skb_queue_head_init(&neigh->queue);
 	ipoib_cm_set(neigh, NULL);
Index: net-2.6/drivers/infiniband/ulp/ipoib/ipoib_multicast.c
===================================================================
--- net-2.6.orig/drivers/infiniband/ulp/ipoib/ipoib_multicast.c	2007-09-18 17:08:53.245849217 +0200
+++ net-2.6/drivers/infiniband/ulp/ipoib/ipoib_multicast.c	2007-09-18 17:09:26.536874045 +0200
@@ -727,7 +727,8 @@ out:
 		if (skb->dst            &&
 		    skb->dst->neighbour &&
 		    !*to_ipoib_neigh(skb->dst->neighbour)) {
-			struct ipoib_neigh *neigh = ipoib_neigh_alloc(skb->dst->neighbour);
+			struct ipoib_neigh *neigh = ipoib_neigh_alloc(skb->dst->neighbour,
+									skb->dev);
 
 			if (neigh) {
 				kref_get(&mcast->ah->ref);

[ofa-general] [PATCH V6 2/9] IB/ipoib: Verify address handle validity on send

[Moni Shoua]

When the bonding device senses a carrier loss of its active slave it replaces
that slave with a new one. In between the times when the carrier of an IPoIB
device goes down and ipoib_neigh is destroyed, it is possible that the
bonding driver will send a packet on a new slave that uses an old ipoib_neigh.
This patch detects and prevents this from happenning.

Signed-off-by: Moni Shoua <monis at voltaire.com>
Signed-off-by: Or Gerlitz <ogerlitz at voltaire.com>
---
 drivers/infiniband/ulp/ipoib/ipoib_main.c |    5 +++--
 1 files changed, 3 insertions(+), 2 deletions(-)

Index: net-2.6/drivers/infiniband/ulp/ipoib/ipoib_main.c
===================================================================
--- net-2.6.orig/drivers/infiniband/ulp/ipoib/ipoib_main.c	2007-09-18 17:09:26.535874225 +0200
+++ net-2.6/drivers/infiniband/ulp/ipoib/ipoib_main.c	2007-09-18 17:10:22.375853147 +0200
@@ -686,9 +686,10 @@ static int ipoib_start_xmit(struct sk_bu
 				goto out;
 			}
 		} else if (neigh->ah) {
-			if (unlikely(memcmp(&neigh->dgid.raw,
+			if (unlikely((memcmp(&neigh->dgid.raw,
 					    skb->dst->neighbour->ha + 4,
-					    sizeof(union ib_gid)))) {
+					    sizeof(union ib_gid))) ||
+					 (neigh->dev != dev))) {
 				spin_lock(&priv->lock);
 				/*
 				 * It's safe to call ipoib_put_ah() inside

[ofa-general] [PATCH V6 3/9] net/bonding: Enable bonding to enslave non ARPHRD_ETHER

[Moni Shoua]

This patch changes some of the bond netdevice attributes and functions
to be that of the active slave for the case of the enslaved device not being
of ARPHRD_ETHER type. Basically it overrides those setting done by ether_setup(),
which are netdevice **type** dependent and hence might be not appropriate for
devices of other types. It also enforces mutual exclusion on bonding slaves
from dissimilar ether types, as was concluded over the v1 discussion.

IPoIB (see Documentation/infiniband/ipoib.txt) MAC address is made of a 3 bytes
IB QP (Queue Pair) number and 16 bytes IB port GID (Global ID) of the port this
IPoIB device is bounded to. The QP is a resource created by the IB HW and the
GID is an identifier burned into the HCA (i have omitted here some details which
are not important for the bonding RFC).

Signed-off-by: Moni Shoua <monis at voltaire.com>
Signed-off-by: Or Gerlitz <ogerlitz at voltaire.com>
---
 drivers/net/bonding/bond_main.c |   39 +++++++++++++++++++++++++++++++++++++++
 1 files changed, 39 insertions(+)

Index: net-2.6/drivers/net/bonding/bond_main.c
===================================================================
--- net-2.6.orig/drivers/net/bonding/bond_main.c	2007-08-15 10:08:59.000000000 +0300
+++ net-2.6/drivers/net/bonding/bond_main.c	2007-08-15 10:54:13.424688411 +0300
@@ -1237,6 +1237,26 @@ static int bond_compute_features(struct 
 	return 0;
 }
 
+
+static void bond_setup_by_slave(struct net_device *bond_dev,
+				struct net_device *slave_dev)
+{
+	bond_dev->hard_header	        = slave_dev->hard_header;
+	bond_dev->rebuild_header        = slave_dev->rebuild_header;
+	bond_dev->hard_header_cache	= slave_dev->hard_header_cache;
+	bond_dev->header_cache_update   = slave_dev->header_cache_update;
+	bond_dev->hard_header_parse	= slave_dev->hard_header_parse;
+
+	bond_dev->neigh_setup           = slave_dev->neigh_setup;
+
+	bond_dev->type		    = slave_dev->type;
+	bond_dev->hard_header_len   = slave_dev->hard_header_len;
+	bond_dev->addr_len	    = slave_dev->addr_len;
+
+	memcpy(bond_dev->broadcast, slave_dev->broadcast,
+		slave_dev->addr_len);
+}
+
 /* enslave device <slave> to bond device <master> */
 int bond_enslave(struct net_device *bond_dev, struct net_device *slave_dev)
 {
@@ -1311,6 +1331,25 @@ int bond_enslave(struct net_device *bond
 		goto err_undo_flags;
 	}
 
+	/* set bonding device ether type by slave - bonding netdevices are
+	 * created with ether_setup, so when the slave type is not ARPHRD_ETHER
+	 * there is a need to override some of the type dependent attribs/funcs.
+	 *
+	 * bond ether type mutual exclusion - don't allow slaves of dissimilar
+	 * ether type (eg ARPHRD_ETHER and ARPHRD_INFINIBAND) share the same bond
+	 */
+	if (bond->slave_cnt == 0) {
+		if (slave_dev->type != ARPHRD_ETHER)
+			bond_setup_by_slave(bond_dev, slave_dev);
+	} else if (bond_dev->type != slave_dev->type) {
+		printk(KERN_ERR DRV_NAME ": %s ether type (%d) is different "
+			"from other slaves (%d), can not enslave it.\n",
+			slave_dev->name,
+			slave_dev->type, bond_dev->type);
+			res = -EINVAL;
+			goto err_undo_flags;
+	}
+
 	if (slave_dev->set_mac_address == NULL) {
 		printk(KERN_ERR DRV_NAME
 			": %s: Error: The slave device you specified does "

[ofa-general] [PATCH V6 4/9] net/bonding: Enable bonding to enslave netdevices not supporting set_mac_address()

[Moni Shoua]

This patch allows for enslaving netdevices which do not support
the set_mac_address() function. In that case the bond mac address is the one
of the active slave, where remote peers are notified on the mac address
(neighbour) change by Gratuitous ARP sent by bonding when fail-over occurs
(this is already done by the bonding code).

Signed-off-by: Moni Shoua <monis at voltaire.com>
Signed-off-by: Or Gerlitz <ogerlitz at voltaire.com>
---
 drivers/net/bonding/bond_main.c |   87 +++++++++++++++++++++++++++-------------
 drivers/net/bonding/bonding.h   |    1 
 2 files changed, 60 insertions(+), 28 deletions(-)

Index: net-2.6/drivers/net/bonding/bond_main.c
===================================================================
--- net-2.6.orig/drivers/net/bonding/bond_main.c	2007-08-15 10:54:13.000000000 +0300
+++ net-2.6/drivers/net/bonding/bond_main.c	2007-08-15 10:54:41.971632881 +0300
@@ -1095,6 +1095,14 @@ void bond_change_active_slave(struct bon
 		if (new_active) {
 			bond_set_slave_active_flags(new_active);
 		}
+
+		/* when bonding does not set the slave MAC address, the bond MAC
+		 * address is the one of the active slave.
+		 */
+		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);
 	}
 }
@@ -1351,13 +1359,22 @@ int bond_enslave(struct net_device *bond
 	}
 
 	if (slave_dev->set_mac_address == NULL) {
-		printk(KERN_ERR DRV_NAME
-			": %s: Error: The slave device you specified does "
-			"not support setting the MAC address. "
-			"Your kernel likely does not support slave "
-			"devices.\n", bond_dev->name);
-  		res = -EOPNOTSUPP;
-		goto err_undo_flags;
+		if (bond->slave_cnt == 0) {
+			printk(KERN_WARNING DRV_NAME
+				": %s: Warning: The first slave device you "
+				"specified does not support setting the MAC "
+				"address. This bond MAC address would be that "
+				"of the active slave.\n", bond_dev->name);
+			bond->do_set_mac_addr = 0;
+		} else if (bond->do_set_mac_addr) {
+			printk(KERN_ERR DRV_NAME
+				": %s: Error: The slave device you specified "
+				"does not support setting the MAC addres,."
+				"but this bond uses this practice. \n"
+				, bond_dev->name);
+			res = -EOPNOTSUPP;
+			goto err_undo_flags;
+		}
 	}
 
 	new_slave = kzalloc(sizeof(struct slave), GFP_KERNEL);
@@ -1378,16 +1395,18 @@ int bond_enslave(struct net_device *bond
 	 */
 	memcpy(new_slave->perm_hwaddr, slave_dev->dev_addr, ETH_ALEN);
 
-	/*
-	 * Set slave to master's mac address.  The application already
-	 * set the master's mac address to that of the first slave
-	 */
-	memcpy(addr.sa_data, bond_dev->dev_addr, bond_dev->addr_len);
-	addr.sa_family = slave_dev->type;
-	res = dev_set_mac_address(slave_dev, &addr);
-	if (res) {
-		dprintk("Error %d calling set_mac_address\n", res);
-		goto err_free;
+	if (bond->do_set_mac_addr) {
+		/*
+		 * Set slave to master's mac address.  The application already
+		 * set the master's mac address to that of the first slave
+		 */
+		memcpy(addr.sa_data, bond_dev->dev_addr, bond_dev->addr_len);
+		addr.sa_family = slave_dev->type;
+		res = dev_set_mac_address(slave_dev, &addr);
+		if (res) {
+			dprintk("Error %d calling set_mac_address\n", res);
+			goto err_free;
+		}
 	}
 
 	res = netdev_set_master(slave_dev, bond_dev);
@@ -1612,9 +1631,11 @@ err_close:
 	dev_close(slave_dev);
 
 err_restore_mac:
-	memcpy(addr.sa_data, new_slave->perm_hwaddr, ETH_ALEN);
-	addr.sa_family = slave_dev->type;
-	dev_set_mac_address(slave_dev, &addr);
+	if (bond->do_set_mac_addr) {
+		memcpy(addr.sa_data, new_slave->perm_hwaddr, ETH_ALEN);
+		addr.sa_family = slave_dev->type;
+		dev_set_mac_address(slave_dev, &addr);
+	}
 
 err_free:
 	kfree(new_slave);
@@ -1792,10 +1813,12 @@ int bond_release(struct net_device *bond
 	/* close slave before restoring its mac address */
 	dev_close(slave_dev);
 
-	/* restore original ("permanent") mac address */
-	memcpy(addr.sa_data, slave->perm_hwaddr, ETH_ALEN);
-	addr.sa_family = slave_dev->type;
-	dev_set_mac_address(slave_dev, &addr);
+	if (bond->do_set_mac_addr) {
+		/* restore original ("permanent") mac address */
+		memcpy(addr.sa_data, slave->perm_hwaddr, ETH_ALEN);
+		addr.sa_family = slave_dev->type;
+		dev_set_mac_address(slave_dev, &addr);
+	}
 
 	slave_dev->priv_flags &= ~(IFF_MASTER_8023AD | IFF_MASTER_ALB |
 				   IFF_SLAVE_INACTIVE | IFF_BONDING |
@@ -1882,10 +1905,12 @@ static int bond_release_all(struct net_d
 		/* close slave before restoring its mac address */
 		dev_close(slave_dev);
 
-		/* restore original ("permanent") mac address*/
-		memcpy(addr.sa_data, slave->perm_hwaddr, ETH_ALEN);
-		addr.sa_family = slave_dev->type;
-		dev_set_mac_address(slave_dev, &addr);
+		if (bond->do_set_mac_addr) {
+			/* restore original ("permanent") mac address*/
+			memcpy(addr.sa_data, slave->perm_hwaddr, ETH_ALEN);
+			addr.sa_family = slave_dev->type;
+			dev_set_mac_address(slave_dev, &addr);
+		}
 
 		slave_dev->priv_flags &= ~(IFF_MASTER_8023AD | IFF_MASTER_ALB |
 					   IFF_SLAVE_INACTIVE);
@@ -3922,6 +3947,9 @@ static int bond_set_mac_address(struct n
 
 	dprintk("bond=%p, name=%s\n", bond, (bond_dev ? bond_dev->name : "None"));
 
+	if (!bond->do_set_mac_addr)
+		return -EOPNOTSUPP;
+
 	if (!is_valid_ether_addr(sa->sa_data)) {
 		return -EADDRNOTAVAIL;
 	}
@@ -4312,6 +4340,9 @@ static int bond_init(struct net_device *
 	bond_create_proc_entry(bond);
 #endif
 
+	/* set do_set_mac_addr to true on startup */
+	bond->do_set_mac_addr = 1;
+
 	list_add_tail(&bond->bond_list, &bond_dev_list);
 
 	return 0;
Index: net-2.6/drivers/net/bonding/bonding.h
===================================================================
--- net-2.6.orig/drivers/net/bonding/bonding.h	2007-08-15 10:08:58.000000000 +0300
+++ net-2.6/drivers/net/bonding/bonding.h	2007-08-15 10:55:34.359354833 +0300
@@ -185,6 +185,7 @@ struct bonding {
 	struct   timer_list mii_timer;
 	struct   timer_list arp_timer;
 	s8       kill_timers;
+	s8       do_set_mac_addr;
 	struct   net_device_stats stats;
 #ifdef CONFIG_PROC_FS
 	struct   proc_dir_entry *proc_entry;

[ofa-general] [PATCH V6 5/9] net/bonding: Enable IP multicast for bonding IPoIB devices

[Moni Shoua]

Allow to enslave devices when the bonding device is not up. Over the discussion
held at the previous post this seemed to be the most clean way to go, where it
is not expected to cause instabilities.

Normally, the bonding driver is UP before any enslavement takes place.
Once a netdevice is UP, the network stack acts to have it join some multicast groups
(eg the all-hosts 224.0.0.1). Now, since ether_setup() have set the bonding device
type to be ARPHRD_ETHER and address len to be ETHER_ALEN, the net core code
computes a wrong multicast link address. This is b/c ip_eth_mc_map() is called
where for multicast joins taking place after the enslavement another ip_xxx_mc_map()
is called (eg ip_ib_mc_map() when the bond type is ARPHRD_INFINIBAND)

Signed-off-by: Moni Shoua <monis at voltaire.com>
Signed-off-by: Or Gerlitz <ogerlitz at voltaire.com>
---
 drivers/net/bonding/bond_main.c  |    5 +++--
 drivers/net/bonding/bond_sysfs.c |    6 ++----
 2 files changed, 5 insertions(+), 6 deletions(-)

Index: net-2.6/drivers/net/bonding/bond_main.c
===================================================================
--- net-2.6.orig/drivers/net/bonding/bond_main.c	2007-08-15 10:54:41.000000000 +0300
+++ net-2.6/drivers/net/bonding/bond_main.c	2007-08-15 10:55:48.431862446 +0300
@@ -1285,8 +1285,9 @@ int bond_enslave(struct net_device *bond
 
 	/* bond must be initialized by bond_open() before enslaving */
 	if (!(bond_dev->flags & IFF_UP)) {
-		dprintk("Error, master_dev is not up\n");
-		return -EPERM;
+		printk(KERN_WARNING DRV_NAME
+			" %s: master_dev is not up in bond_enslave\n",
+			bond_dev->name);
 	}
 
 	/* already enslaved */
Index: net-2.6/drivers/net/bonding/bond_sysfs.c
===================================================================
--- net-2.6.orig/drivers/net/bonding/bond_sysfs.c	2007-08-15 10:08:58.000000000 +0300
+++ net-2.6/drivers/net/bonding/bond_sysfs.c	2007-08-15 10:55:48.432862269 +0300
@@ -266,11 +266,9 @@ static ssize_t bonding_store_slaves(stru
 
 	/* Quick sanity check -- is the bond interface up? */
 	if (!(bond->dev->flags & IFF_UP)) {
-		printk(KERN_ERR DRV_NAME
-		       ": %s: Unable to update slaves because interface is down.\n",
+		printk(KERN_WARNING DRV_NAME
+		       ": %s: doing slave updates when interface is down.\n",
 		       bond->dev->name);
-		ret = -EPERM;
-		goto out;
 	}
 
 	/* Note:  We can't hold bond->lock here, as bond_create grabs it. */

Re: [PATCH V6 5/9] net/bonding: Enable IP multicast for bonding IPoIB devices

[Stephen Hemminger]

On Mon, 24 Sep 2007 17:37:00 +0200
Moni Shoua <monis@voltaire.com> wrote:

> Allow to enslave devices when the bonding device is not up. Over the discussion
> held at the previous post this seemed to be the most clean way to go, where it
> is not expected to cause instabilities.
> 
> Normally, the bonding driver is UP before any enslavement takes place.
> Once a netdevice is UP, the network stack acts to have it join some multicast groups
> (eg the all-hosts 224.0.0.1). Now, since ether_setup() have set the bonding device
> type to be ARPHRD_ETHER and address len to be ETHER_ALEN, the net core code
> computes a wrong multicast link address. This is b/c ip_eth_mc_map() is called
> where for multicast joins taking place after the enslavement another ip_xxx_mc_map()
> is called (eg ip_ib_mc_map() when the bond type is ARPHRD_INFINIBAND)
> 
> Signed-off-by: Moni Shoua <monis at voltaire.com>
> Signed-off-by: Or Gerlitz <ogerlitz at voltaire.com>
> ---
>  drivers/net/bonding/bond_main.c  |    5 +++--
>  drivers/net/bonding/bond_sysfs.c |    6 ++----
>  2 files changed, 5 insertions(+), 6 deletions(-)
> 
> Index: net-2.6/drivers/net/bonding/bond_main.c
> ===================================================================
> --- net-2.6.orig/drivers/net/bonding/bond_main.c	2007-08-15 10:54:41.000000000 +0300
> +++ net-2.6/drivers/net/bonding/bond_main.c	2007-08-15 10:55:48.431862446 +0300
> @@ -1285,8 +1285,9 @@ int bond_enslave(struct net_device *bond
>  
>  	/* bond must be initialized by bond_open() before enslaving */
>  	if (!(bond_dev->flags & IFF_UP)) {
> -		dprintk("Error, master_dev is not up\n");
> -		return -EPERM;
> +		printk(KERN_WARNING DRV_NAME
> +			" %s: master_dev is not up in bond_enslave\n",
> +			bond_dev->name);
>  	}
>  
>  	/* already enslaved */
> Index: net-2.6/drivers/net/bonding/bond_sysfs.c
> ===================================================================
> --- net-2.6.orig/drivers/net/bonding/bond_sysfs.c	2007-08-15 10:08:58.000000000 +0300
> +++ net-2.6/drivers/net/bonding/bond_sysfs.c	2007-08-15 10:55:48.432862269 +0300
> @@ -266,11 +266,9 @@ static ssize_t bonding_store_slaves(stru
>  
>  	/* Quick sanity check -- is the bond interface up? */
>  	if (!(bond->dev->flags & IFF_UP)) {
> -		printk(KERN_ERR DRV_NAME
> -		       ": %s: Unable to update slaves because interface is down.\n",
> +		printk(KERN_WARNING DRV_NAME
> +		       ": %s: doing slave updates when interface is down.\n",
>  		       bond->dev->name);
> -		ret = -EPERM;
> -		goto out;
>  	}
>  

Please get rid of the warning. Make bonding work correctly and allow enslave/remove
of device when bonding is down.

Re: [PATCH V6 5/9] net/bonding: Enable IP multicast for bonding IPoIB devices

[Moni Shoua]

> 
> Please get rid of the warning. Make bonding work correctly and allow enslave/remove
> of device when bonding is down.
> -
> To unsubscribe from this list: send the line "unsubscribe netdev" in
> the body of a message to majordomo@vger.kernel.org
> More majordomo info at  http://vger.kernel.org/majordomo-info.html
> 

Hi,
I prefer to postpone it till I submit another version of the patches or
till after the patches are merged. Anyway, I've added this to the TODO list.

thanks

 MoniS

[PATCH V6 6/9] net/bonding: Handlle wrong assumptions that slave is always an Ethernet device

[Moni Shoua]

bonding sometimes uses Ethernet constants (such as MTU and address length) which
are not good when it enslaves non Ethernet devices (such as InfiniBand).

Signed-off-by: Moni Shoua <monis at voltaire.com>
---
 drivers/net/bonding/bond_main.c  |    3 ++-
 drivers/net/bonding/bond_sysfs.c |   10 ++++++++--
 drivers/net/bonding/bonding.h    |    1 +
 3 files changed, 11 insertions(+), 3 deletions(-)

Index: net-2.6/drivers/net/bonding/bond_main.c
===================================================================
--- net-2.6.orig/drivers/net/bonding/bond_main.c	2007-09-24 12:52:33.000000000 +0200
+++ net-2.6/drivers/net/bonding/bond_main.c	2007-09-24 12:57:33.411459811 +0200
@@ -1224,7 +1224,8 @@ static int bond_compute_features(struct 
 	struct slave *slave;
 	struct net_device *bond_dev = bond->dev;
 	unsigned long features = bond_dev->features;
-	unsigned short max_hard_header_len = ETH_HLEN;
+	unsigned short max_hard_header_len = max((u16)ETH_HLEN,
+						bond_dev->hard_header_len);
 	int i;
 
 	features &= ~(NETIF_F_ALL_CSUM | BOND_VLAN_FEATURES);
Index: net-2.6/drivers/net/bonding/bond_sysfs.c
===================================================================
--- net-2.6.orig/drivers/net/bonding/bond_sysfs.c	2007-09-24 12:55:09.000000000 +0200
+++ net-2.6/drivers/net/bonding/bond_sysfs.c	2007-09-24 13:00:23.752680721 +0200
@@ -260,6 +260,7 @@ static ssize_t bonding_store_slaves(stru
 	char command[IFNAMSIZ + 1] = { 0, };
 	char *ifname;
 	int i, res, found, ret = count;
+	u32 original_mtu;
 	struct slave *slave;
 	struct net_device *dev = NULL;
 	struct bonding *bond = to_bond(d);
@@ -325,6 +326,7 @@ static ssize_t bonding_store_slaves(stru
 		}
 
 		/* Set the slave's MTU to match the bond */
+		original_mtu = dev->mtu;
 		if (dev->mtu != bond->dev->mtu) {
 			if (dev->change_mtu) {
 				res = dev->change_mtu(dev,
@@ -339,6 +341,9 @@ static ssize_t bonding_store_slaves(stru
 		}
 		rtnl_lock();
 		res = bond_enslave(bond->dev, dev);
+		bond_for_each_slave(bond, slave, i)
+			if (strnicmp(slave->dev->name, ifname, IFNAMSIZ) == 0)
+				slave->original_mtu = original_mtu;
 		rtnl_unlock();
 		if (res) {
 			ret = res;
@@ -351,6 +356,7 @@ static ssize_t bonding_store_slaves(stru
 		bond_for_each_slave(bond, slave, i)
 			if (strnicmp(slave->dev->name, ifname, IFNAMSIZ) == 0) {
 				dev = slave->dev;
+				original_mtu = slave->original_mtu;
 				break;
 			}
 		if (dev) {
@@ -365,9 +371,9 @@ static ssize_t bonding_store_slaves(stru
 			}
 			/* set the slave MTU to the default */
 			if (dev->change_mtu) {
-				dev->change_mtu(dev, 1500);
+				dev->change_mtu(dev, original_mtu);
 			} else {
-				dev->mtu = 1500;
+				dev->mtu = original_mtu;
 			}
 		}
 		else {
Index: net-2.6/drivers/net/bonding/bonding.h
===================================================================
--- net-2.6.orig/drivers/net/bonding/bonding.h	2007-09-24 12:55:09.000000000 +0200
+++ net-2.6/drivers/net/bonding/bonding.h	2007-09-24 12:57:33.412459636 +0200
@@ -156,6 +156,7 @@ struct slave {
 	s8     link;    /* one of BOND_LINK_XXXX */
 	s8     state;   /* one of BOND_STATE_XXXX */
 	u32    original_flags;
+	u32    original_mtu;
 	u32    link_failure_count;
 	u16    speed;
 	u8     duplex;

[ofa-general] PATCH V6 7/9] net/bonding: Delay sending of gratuitous ARP to avoid failure

[Moni Shoua]

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 at voltaire.com>
---
 drivers/net/bonding/bond_main.c |   24 +++++++++++++++++++++---
 drivers/net/bonding/bonding.h   |    1 +
 2 files changed, 22 insertions(+), 3 deletions(-)

Index: net-2.6/drivers/net/bonding/bond_main.c
===================================================================
--- net-2.6.orig/drivers/net/bonding/bond_main.c	2007-08-15 10:56:33.000000000 +0300
+++ net-2.6/drivers/net/bonding/bond_main.c	2007-08-15 11:04:37.221123652 +0300
@@ -1102,8 +1102,14 @@ 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);
 	}
 }
 
@@ -2083,6 +2089,17 @@ 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");
+		else {
+			dprintk("sending delayed gratuitous arp on on %s\n",
+				bond->curr_active_slave->dev->name);
+			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);
@@ -2484,7 +2501,7 @@ static void bond_send_gratuitous_arp(str
 
 	if (bond->master_ip) {
 		bond_arp_send(slave->dev, ARPOP_REPLY, bond->master_ip,
-				  bond->master_ip, 0);
+				bond->master_ip, 0);
 	}
 
 	list_for_each_entry(vlan, &bond->vlan_list, vlan_list) {
@@ -4293,6 +4310,7 @@ 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	2007-08-15 10:56:33.000000000 +0300
+++ net-2.6/drivers/net/bonding/bonding.h	2007-08-15 11:05:41.516451497 +0300
@@ -187,6 +187,7 @@ struct bonding {
 	struct   timer_list arp_timer;
 	s8       kill_timers;
 	s8       do_set_mac_addr;
+	s8	 send_grat_arp;
 	struct   net_device_stats stats;
 #ifdef CONFIG_PROC_FS
 	struct   proc_dir_entry *proc_entry;

[PATCH V6 8/9] net/bonding: Destroy bonding master when last slave is gone

[Moni Shoua]

When bonding enslaves non Ethernet devices it takes pointers to functions 
in the module that owns the slaves. In this case it becomes unsafe
to keep the bonding master registered after last slave was unenslaved 
because we don't know if the pointers are still valid.  Destroying the bond when slave_cnt is zero
ensures that these functions be used anymore.

Signed-off-by: Moni Shoua <monis at voltaire.com>
---
 drivers/net/bonding/bond_main.c  |   37 +++++++++++++++++++++++++++++++++++++
 drivers/net/bonding/bond_sysfs.c |    9 +++++----
 drivers/net/bonding/bonding.h    |    3 +++
 3 files changed, 45 insertions(+), 4 deletions(-)

Index: net-2.6/drivers/net/bonding/bond_main.c
===================================================================
--- net-2.6.orig/drivers/net/bonding/bond_main.c	2007-09-24 14:01:24.055441842 +0200
+++ net-2.6/drivers/net/bonding/bond_main.c	2007-09-24 14:05:05.658979207 +0200
@@ -1256,6 +1256,7 @@ static int bond_compute_features(struct 
 static void bond_setup_by_slave(struct net_device *bond_dev,
 				struct net_device *slave_dev)
 {
+	struct bonding *bond = bond_dev->priv;
 	bond_dev->hard_header	        = slave_dev->hard_header;
 	bond_dev->rebuild_header        = slave_dev->rebuild_header;
 	bond_dev->hard_header_cache	= slave_dev->hard_header_cache;
@@ -1270,6 +1271,7 @@ static void bond_setup_by_slave(struct n
 
 	memcpy(bond_dev->broadcast, slave_dev->broadcast,
 		slave_dev->addr_len);
+	bond->setup_by_slave = 1;
 }
 
 /* enslave device <slave> to bond device <master> */
@@ -1838,6 +1840,35 @@ int bond_release(struct net_device *bond
 }
 
 /*
+* Destroy a bonding device.
+* Must be under rtnl_lock when this function is called.
+*/
+void bond_destroy(struct bonding *bond)
+{
+	bond_deinit(bond->dev);
+	bond_destroy_sysfs_entry(bond);
+	unregister_netdevice(bond->dev);
+}
+
+/*
+* First release a slave and than destroy the bond if no more slaves iare left.
+* Must be under rtnl_lock when this function is called.
+*/
+int  bond_release_and_destroy(struct net_device *bond_dev, struct net_device *slave_dev)
+{
+	struct bonding *bond = bond_dev->priv;
+	int ret;
+
+	ret = bond_release(bond_dev, slave_dev);
+	if ((ret == 0) && (bond->slave_cnt == 0)) {
+		printk(KERN_INFO DRV_NAME " %s: destroying bond %s.\n",
+					bond_dev->name);
+		bond_destroy(bond);
+	}
+	return ret;
+}
+
+/*
  * This function releases all slaves.
  */
 static int bond_release_all(struct net_device *bond_dev)
@@ -3337,6 +3368,11 @@ static int bond_slave_netdev_event(unsig
 		 * ... Or is it this?
 		 */
 		break;
+	case NETDEV_GOING_DOWN:
+		dprintk("slave %s is going down\n", slave_dev->name);
+		if (bond->setup_by_slave)
+			bond_release_and_destroy(bond_dev, slave_dev);
+		break;
 	case NETDEV_CHANGEMTU:
 		/*
 		 * TODO: Should slaves be allowed to
@@ -4311,6 +4347,7 @@ static int bond_init(struct net_device *
 	bond->primary_slave = NULL;
 	bond->dev = bond_dev;
 	bond->send_grat_arp = 0;
+	bond->setup_by_slave = 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	2007-09-24 14:01:24.055441842 +0200
+++ net-2.6/drivers/net/bonding/bonding.h	2007-09-24 14:01:24.627340013 +0200
@@ -188,6 +188,7 @@ struct bonding {
 	s8       kill_timers;
 	s8       do_set_mac_addr;
 	s8	 send_grat_arp;
+	s8	 setup_by_slave;
 	struct   net_device_stats stats;
 #ifdef CONFIG_PROC_FS
 	struct   proc_dir_entry *proc_entry;
@@ -295,6 +296,8 @@ static inline void bond_unset_master_alb
 struct vlan_entry *bond_next_vlan(struct bonding *bond, struct vlan_entry *curr);
 int bond_dev_queue_xmit(struct bonding *bond, struct sk_buff *skb, struct net_device *slave_dev);
 int bond_create(char *name, struct bond_params *params, struct bonding **newbond);
+void bond_destroy(struct bonding *bond);
+int  bond_release_and_destroy(struct net_device *bond_dev, struct net_device *slave_dev);
 void bond_deinit(struct net_device *bond_dev);
 int bond_create_sysfs(void);
 void bond_destroy_sysfs(void);
Index: net-2.6/drivers/net/bonding/bond_sysfs.c
===================================================================
--- net-2.6.orig/drivers/net/bonding/bond_sysfs.c	2007-09-24 14:01:23.523536550 +0200
+++ net-2.6/drivers/net/bonding/bond_sysfs.c	2007-09-24 14:01:24.628339835 +0200
@@ -164,9 +164,7 @@ static ssize_t bonding_store_bonds(struc
 				printk(KERN_INFO DRV_NAME
 					": %s is being deleted...\n",
 					bond->dev->name);
-				bond_deinit(bond->dev);
-		        	bond_destroy_sysfs_entry(bond);
-				unregister_netdevice(bond->dev);
+				bond_destroy(bond);
 				rtnl_unlock();
 				goto out;
 			}
@@ -363,7 +361,10 @@ static ssize_t bonding_store_slaves(stru
 			printk(KERN_INFO DRV_NAME ": %s: Removing slave %s\n",
 				bond->dev->name, dev->name);
 			rtnl_lock();
-			res = bond_release(bond->dev, dev);
+			if (bond->setup_by_slave)
+				res = bond_release_and_destroy(bond->dev, dev);
+			else
+				res = bond_release(bond->dev, dev);
 			rtnl_unlock();
 			if (res) {
 				ret = res;

[PATCH 9/9] bonding: Optionally allow ethernet slaves to keep own MAC

[Moni Shoua]

Update the "don't change MAC of slaves" functionality added in
previous changes to be a generic option, rather than something tied to IB
devices, as it's occasionally useful for regular ethernet devices as well.

	Adds "fail_over_mac" option (which is automatically enabled for IB
slaves), applicable only to active-backup mode.

	Includes documentation update.

	Updates bonding driver version to 3.2.0.

Signed-off-by: Jay Vosburgh <fubar@us.ibm.com>
---
 Documentation/networking/bonding.txt |   33 +++++++++++++++++++
 drivers/net/bonding/bond_main.c      |   57 +++++++++++++++++++++------------
 drivers/net/bonding/bond_sysfs.c     |   49 +++++++++++++++++++++++++++++
 drivers/net/bonding/bonding.h        |    6 ++--
 4 files changed, 121 insertions(+), 24 deletions(-)

diff --git a/Documentation/networking/bonding.txt b/Documentation/networking/bonding.txt
index 1da5666..1134062 100644
--- a/Documentation/networking/bonding.txt
+++ b/Documentation/networking/bonding.txt
@@ -281,6 +281,39 @@ downdelay
 	will be rounded down to the nearest multiple.  The default
 	value is 0.
 
+fail_over_mac
+
+	Specifies whether active-backup mode should set all slaves to
+	the same MAC address (the traditional behavior), or, when
+	enabled, change the bond's MAC address when changing the
+	active interface (i.e., fail over the MAC address itself).
+
+	Fail over MAC is useful for devices that cannot ever alter
+	their MAC address, or for devices that refuse incoming
+	broadcasts with their own source MAC (which interferes with
+	the ARP monitor).
+
+	The down side of fail over MAC is that every device on the
+	network must be updated via gratuitous ARP, vs. just updating
+	a switch or set of switches (which often takes place for any
+	traffic, not just ARP traffic, if the switch snoops incoming
+	traffic to update its tables) for the traditional method.  If
+	the gratuitous ARP is lost, communication may be disrupted.
+
+	When fail over MAC is used in conjuction with the mii monitor,
+	devices which assert link up prior to being able to actually
+	transmit and receive are particularly susecptible to loss of
+	the gratuitous ARP, and an appropriate updelay setting may be
+	required.
+
+	A value of 0 disables fail over MAC, and is the default.  A
+	value of 1 enables fail over MAC.  This option is enabled
+	automatically if the first slave added cannot change its MAC
+	address.  This option may be modified via sysfs only when no
+	slaves are present in the bond.
+
+	This option was added in bonding version 3.2.0.
+
 lacp_rate
 
 	Option specifying the rate in which we'll ask our link partner
diff --git a/drivers/net/bonding/bond_main.c b/drivers/net/bonding/bond_main.c
index 77caca3..c01ff9d 100644
--- a/drivers/net/bonding/bond_main.c
+++ b/drivers/net/bonding/bond_main.c
@@ -97,6 +97,7 @@ static char *xmit_hash_policy = NULL;
 static int arp_interval = BOND_LINK_ARP_INTERV;
 static char *arp_ip_target[BOND_MAX_ARP_TARGETS] = { NULL, };
 static char *arp_validate = NULL;
+static int fail_over_mac = 0;
 struct bond_params bonding_defaults;
 
 module_param(max_bonds, int, 0);
@@ -130,6 +131,8 @@ module_param_array(arp_ip_target, charp, NULL, 0);
 MODULE_PARM_DESC(arp_ip_target, "arp targets in n.n.n.n form");
 module_param(arp_validate, charp, 0);
 MODULE_PARM_DESC(arp_validate, "validate src/dst of ARP probes: none (default), active, backup or all");
+module_param(fail_over_mac, int, 0);
+MODULE_PARM_DESC(fail_over_mac, "For active-backup, do not set all slaves to the same MAC.  0 of off (default), 1 for on.");
 
 /*----------------------------- Global variables ----------------------------*/
 
@@ -1099,7 +1102,7 @@ void bond_change_active_slave(struct bonding *bond, struct slave *new_active)
 		/* when bonding does not set the slave MAC address, the bond MAC
 		 * address is the one of the active slave.
 		 */
-		if (new_active && !bond->do_set_mac_addr)
+		if (new_active && bond->params.fail_over_mac)
 			memcpy(bond->dev->dev_addr,  new_active->dev->dev_addr,
 				new_active->dev->addr_len);
 		if (bond->curr_active_slave &&
@@ -1371,16 +1374,16 @@ int bond_enslave(struct net_device *bond_dev, struct net_device *slave_dev)
 	if (slave_dev->set_mac_address == NULL) {
 		if (bond->slave_cnt == 0) {
 			printk(KERN_WARNING DRV_NAME
-				": %s: Warning: The first slave device you "
-				"specified does not support setting the MAC "
-				"address. This bond MAC address would be that "
-				"of the active slave.\n", bond_dev->name);
-			bond->do_set_mac_addr = 0;
-		} else if (bond->do_set_mac_addr) {
+			       ": %s: Warning: The first slave device "
+			       "specified does not support setting the MAC "
+			       "address. Enabling the fail_over_mac option.",
+			       bond_dev->name);
+			bond->params.fail_over_mac = 1;
+		} else if (!bond->params.fail_over_mac) {
 			printk(KERN_ERR DRV_NAME
-				": %s: Error: The slave device you specified "
-				"does not support setting the MAC addres,."
-				"but this bond uses this practice. \n"
+				": %s: Error: The slave device specified "
+				"does not support setting the MAC address, "
+				"but fail_over_mac is not enabled.\n"
 				, bond_dev->name);
 			res = -EOPNOTSUPP;
 			goto err_undo_flags;
@@ -1405,7 +1408,7 @@ int bond_enslave(struct net_device *bond_dev, struct net_device *slave_dev)
 	 */
 	memcpy(new_slave->perm_hwaddr, slave_dev->dev_addr, ETH_ALEN);
 
-	if (bond->do_set_mac_addr) {
+	if (!bond->params.fail_over_mac) {
 		/*
 		 * Set slave to master's mac address.  The application already
 		 * set the master's mac address to that of the first slave
@@ -1641,7 +1644,7 @@ err_close:
 	dev_close(slave_dev);
 
 err_restore_mac:
-	if (bond->do_set_mac_addr) {
+	if (!bond->params.fail_over_mac) {
 		memcpy(addr.sa_data, new_slave->perm_hwaddr, ETH_ALEN);
 		addr.sa_family = slave_dev->type;
 		dev_set_mac_address(slave_dev, &addr);
@@ -1823,7 +1826,7 @@ int bond_release(struct net_device *bond_dev, struct net_device *slave_dev)
 	/* close slave before restoring its mac address */
 	dev_close(slave_dev);
 
-	if (bond->do_set_mac_addr) {
+	if (!bond->params.fail_over_mac) {
 		/* restore original ("permanent") mac address */
 		memcpy(addr.sa_data, slave->perm_hwaddr, ETH_ALEN);
 		addr.sa_family = slave_dev->type;
@@ -1944,7 +1947,7 @@ static int bond_release_all(struct net_device *bond_dev)
 		/* close slave before restoring its mac address */
 		dev_close(slave_dev);
 
-		if (bond->do_set_mac_addr) {
+		if (!bond->params.fail_over_mac) {
 			/* restore original ("permanent") mac address*/
 			memcpy(addr.sa_data, slave->perm_hwaddr, ETH_ALEN);
 			addr.sa_family = slave_dev->type;
@@ -3066,9 +3069,15 @@ static void bond_info_show_master(struct seq_file *seq)
 	curr = bond->curr_active_slave;
 	read_unlock(&bond->curr_slave_lock);
 
-	seq_printf(seq, "Bonding Mode: %s\n",
+	seq_printf(seq, "Bonding Mode: %s",
 		   bond_mode_name(bond->params.mode));
 
+	if (bond->params.mode == BOND_MODE_ACTIVEBACKUP &&
+	    bond->params.fail_over_mac)
+		seq_printf(seq, " (fail_over_mac)");
+
+	seq_printf(seq, "\n");
+
 	if (bond->params.mode == BOND_MODE_XOR ||
 		bond->params.mode == BOND_MODE_8023AD) {
 		seq_printf(seq, "Transmit Hash Policy: %s (%d)\n",
@@ -4008,8 +4017,12 @@ static int bond_set_mac_address(struct net_device *bond_dev, void *addr)
 
 	dprintk("bond=%p, name=%s\n", bond, (bond_dev ? bond_dev->name : "None"));
 
-	if (!bond->do_set_mac_addr)
-		return -EOPNOTSUPP;
+	/*
+	 * If fail_over_mac is enabled, do nothing and return success.
+	 * Returning an error causes ifenslave to fail.
+	 */
+	if (bond->params.fail_over_mac)
+		return 0;
 
 	if (!is_valid_ether_addr(sa->sa_data)) {
 		return -EADDRNOTAVAIL;
@@ -4402,10 +4415,6 @@ static int bond_init(struct net_device *bond_dev, struct bond_params *params)
 #ifdef CONFIG_PROC_FS
 	bond_create_proc_entry(bond);
 #endif
-
-	/* set do_set_mac_addr to true on startup */
-	bond->do_set_mac_addr = 1;
-
 	list_add_tail(&bond->bond_list, &bond_dev_list);
 
 	return 0;
@@ -4739,6 +4748,11 @@ static int bond_check_params(struct bond_params *params)
 		primary = NULL;
 	}
 
+	if (fail_over_mac && (bond_mode != BOND_MODE_ACTIVEBACKUP))
+		printk(KERN_WARNING DRV_NAME
+		       ": Warning: fail_over_mac only affects "
+		       "active-backup mode.\n");
+
 	/* fill params struct with the proper values */
 	params->mode = bond_mode;
 	params->xmit_policy = xmit_hashtype;
@@ -4750,6 +4764,7 @@ static int bond_check_params(struct bond_params *params)
 	params->use_carrier = use_carrier;
 	params->lacp_fast = lacp_fast;
 	params->primary[0] = 0;
+	params->fail_over_mac = fail_over_mac;
 
 	if (primary) {
 		strncpy(params->primary, primary, IFNAMSIZ);
diff --git a/drivers/net/bonding/bond_sysfs.c b/drivers/net/bonding/bond_sysfs.c
index 71db5d9..a907b68 100644
--- a/drivers/net/bonding/bond_sysfs.c
+++ b/drivers/net/bonding/bond_sysfs.c
@@ -567,6 +567,54 @@ static ssize_t bonding_store_arp_validate(struct device *d,
 static DEVICE_ATTR(arp_validate, S_IRUGO | S_IWUSR, bonding_show_arp_validate, bonding_store_arp_validate);
 
 /*
+ * Show and store fail_over_mac.  User only allowed to change the
+ * value when there are no slaves.
+ */
+static ssize_t bonding_show_fail_over_mac(struct device *d, struct device_attribute *attr, char *buf)
+{
+	struct bonding *bond = to_bond(d);
+
+	return sprintf(buf, "%d\n", bond->params.fail_over_mac) + 1;
+}
+
+static ssize_t bonding_store_fail_over_mac(struct device *d, struct device_attribute *attr, const char *buf, size_t count)
+{
+	int new_value;
+	int ret = count;
+	struct bonding *bond = to_bond(d);
+
+	if (bond->slave_cnt != 0) {
+		printk(KERN_ERR DRV_NAME
+		       ": %s: Can't alter fail_over_mac with slaves in bond.\n",
+		       bond->dev->name);
+		ret = -EPERM;
+		goto out;
+	}
+
+	if (sscanf(buf, "%d", &new_value) != 1) {
+		printk(KERN_ERR DRV_NAME
+		       ": %s: no fail_over_mac value specified.\n",
+		       bond->dev->name);
+		ret = -EINVAL;
+		goto out;
+	}
+
+	if ((new_value == 0) || (new_value == 1)) {
+		bond->params.fail_over_mac = new_value;
+		printk(KERN_INFO DRV_NAME ": %s: Setting fail_over_mac to %d.\n",
+		       bond->dev->name, new_value);
+	} else {
+		printk(KERN_INFO DRV_NAME
+		       ": %s: Ignoring invalid fail_over_mac value %d.\n",
+		       bond->dev->name, new_value);
+	}
+out:
+	return ret;
+}
+
+static DEVICE_ATTR(fail_over_mac, S_IRUGO | S_IWUSR, bonding_show_fail_over_mac, bonding_store_fail_over_mac);
+
+/*
  * Show and set the arp timer interval.  There are two tricky bits
  * here.  First, if ARP monitoring is activated, then we must disable
  * MII monitoring.  Second, if the ARP timer isn't running, we must
@@ -1390,6 +1438,7 @@ static DEVICE_ATTR(ad_partner_mac, S_IRUGO, bonding_show_ad_partner_mac, NULL);
 static struct attribute *per_bond_attrs[] = {
 	&dev_attr_slaves.attr,
 	&dev_attr_mode.attr,
+	&dev_attr_fail_over_mac.attr,
 	&dev_attr_arp_validate.attr,
 	&dev_attr_arp_interval.attr,
 	&dev_attr_arp_ip_target.attr,
diff --git a/drivers/net/bonding/bonding.h b/drivers/net/bonding/bonding.h
index ed0f587..9d6153e 100644
--- a/drivers/net/bonding/bonding.h
+++ b/drivers/net/bonding/bonding.h
@@ -22,8 +22,8 @@
 #include "bond_3ad.h"
 #include "bond_alb.h"
 
-#define DRV_VERSION	"3.1.3"
-#define DRV_RELDATE	"June 13, 2007"
+#define DRV_VERSION	"3.2.0"
+#define DRV_RELDATE	"September 13, 2007"
 #define DRV_NAME	"bonding"
 #define DRV_DESCRIPTION	"Ethernet Channel Bonding Driver"
 
@@ -128,6 +128,7 @@ struct bond_params {
 	int arp_interval;
 	int arp_validate;
 	int use_carrier;
+	int fail_over_mac;
 	int updelay;
 	int downdelay;
 	int lacp_fast;
@@ -186,7 +187,6 @@ struct bonding {
 	struct   timer_list mii_timer;
 	struct   timer_list arp_timer;
 	s8       kill_timers;
-	s8       do_set_mac_addr;
 	s8	 send_grat_arp;
 	s8	 setup_by_slave;
 	struct   net_device_stats stats;
-- 1.5.2-rc2.GIT 

Re: [ofa-general] [PATCH V6 0/9] net/bonding: ADD IPoIB support for the bonding driver

[Moni Shoua]

Jay,
I think that all comments to the patches were discussed and handled.
If you agree, can you please push then to the networking tree so they will be
merged into 2.6.24?
This includes the IPoIB patches (agreed with Roland).
Note that there are *no* patches to net/core (like in V5).

thanks

 MoniS

Re: [PATCH V6 0/9] net/bonding: ADD IPoIB support for the bonding driver

[Jay Vosburgh]

ACK patches 3 - 9.

	Roland, are you comfortable with the IB changes in patches 1 and 2?

	Jeff, when Roland acks patches 1 and 2, please apply all 9.

	-J

---
	-Jay Vosburgh, IBM Linux Technology Center, fubar@us.ibm.com


Moni Shoua <monis@voltaire.com> wrote:

>This patch series is the sixth version (see below link to V5) of the 
>suggested changes to the bonding driver so it would be able to support 
>non ARPHRD_ETHER netdevices for its High-Availability (active-backup) mode. 
>
>Patches 1-8 were originally submitted in V5 and patch 9 is an addition by Jay.
>
>
>Major changes from the previous version:
>----------------------------------------
>
>1. Remove the patches to net/core. Bonding will use the NETDEV_GOING_DOWN notification
>   instead of NETDEV_CHANGE+IFF_SLAVE_DETACH. This reduces the amount of patches from 11
>   to 9.
>
>Links to earlier discussion:
>----------------------------
>
>1. A discussion in netdev about bonding support for IPoIB.
>http://lists.openwall.net/netdev/2006/11/30/46
>
>2. V5 series
>http://lists.openfabrics.org/pipermail/general/2007-September/040996.html
>
>-
>To unsubscribe from this list: send the line "unsubscribe netdev" in
>the body of a message to majordomo@vger.kernel.org
>More majordomo info at  http://vger.kernel.org/majordomo-info.html

[ofa-general] Re: [PATCH V6 0/9] net/bonding: ADD IPoIB support for the bonding driver

[Roland Dreier]

 > 	Roland, are you comfortable with the IB changes in patches 1 and 2?

Yes, they look fine to me.  Feel free to apply, with

Acked-by: Roland Dreier <rolandd@cisco.com>

 - R.

Re: [ofa-general] Re: [PATCH V6 0/9] net/bonding: ADD IPoIB support for the bonding driver

[Moni Shoua]

Jay Vosburgh wrote:
> ACK patches 3 - 9.
> 
> 	Roland, are you comfortable with the IB changes in patches 1 and 2?
> 
> 	Jeff, when Roland acks patches 1 and 2, please apply all 9.
> 
> 	-J

Hi Jeff,
Roland acked the IPoIB patches. If you haven't done so already can you please apply them?
I'm not sure when 2.6.24 is going to open and I'm afraid to miss it.

thanks 

Re: [ofa-general] Re: [PATCH V6 0/9] net/bonding: ADD IPoIB support for the bonding driver

[Jeff Garzik]

Moni Shoua wrote:
> Jay Vosburgh wrote:
>> ACK patches 3 - 9.
>>
>> 	Roland, are you comfortable with the IB changes in patches 1 and 2?
>>
>> 	Jeff, when Roland acks patches 1 and 2, please apply all 9.
>>
>> 	-J
> 
> Hi Jeff,
> Roland acked the IPoIB patches. If you haven't done so already can you please apply them?
> I'm not sure when 2.6.24 is going to open and I'm afraid to miss it.

hrm, I don't see them in my inbox for some reason.  can someone bounce 
them to me?  or give me a git tree to pull from?

	Jeff

Re: [ofa-general] Re: [PATCH V6 0/9] net/bonding: ADD IPoIB support for the bonding driver

[Jay Vosburgh]

Jeff Garzik <jgarzik@pobox.com> wrote:

>Moni Shoua wrote:
>> Jay Vosburgh wrote:
>>> ACK patches 3 - 9.
>>>
>>> 	Roland, are you comfortable with the IB changes in patches 1 and 2?
>>>
>>> 	Jeff, when Roland acks patches 1 and 2, please apply all 9.
>>>
>>> 	-J
>>
>> Hi Jeff,
>> Roland acked the IPoIB patches. If you haven't done so already can you please apply them?
>> I'm not sure when 2.6.24 is going to open and I'm afraid to miss it.
>
>hrm, I don't see them in my inbox for some reason.  can someone bounce
>them to me?  or give me a git tree to pull from?

	Moni, can you repost the patch series to Jeff, and put the
appropriate "Acked-by" lines in for myself (patches 3 - 8) and Roland
(patches 1 and 2)?  You can probably leave off the netdev and
openfabrics lists, but cc me.

	-J

---
	-Jay Vosburgh, IBM Linux Technology Center, fubar@us.ibm.com

Re: [ofa-general] Re: [PATCH V6 0/9] net/bonding: ADD IPoIB support for the bonding driver

[Moni Shoua]

Jay Vosburgh wrote:
> Jeff Garzik <jgarzik@pobox.com> wrote:
> 
>> Moni Shoua wrote:
>>> Jay Vosburgh wrote:
>>>> ACK patches 3 - 9.
>>>>
>>>> 	Roland, are you comfortable with the IB changes in patches 1 and 2?
>>>>
>>>> 	Jeff, when Roland acks patches 1 and 2, please apply all 9.
>>>>
>>>> 	-J
>>> Hi Jeff,
>>> Roland acked the IPoIB patches. If you haven't done so already can you please apply them?
>>> I'm not sure when 2.6.24 is going to open and I'm afraid to miss it.
>> hrm, I don't see them in my inbox for some reason.  can someone bounce
>> them to me?  or give me a git tree to pull from?
> 
> 	Moni, can you repost the patch series to Jeff, and put the
> appropriate "Acked-by" lines in for myself (patches 3 - 8) and Roland
> (patches 1 and 2)?  You can probably leave off the netdev and
> openfabrics lists, but cc me.
> 
> 	-J
> 
> ---
> 	-Jay Vosburgh, IBM Linux Technology Center, fubar@us.ibm.com
> 
Hi Jeff,
I don't commits of the patches in http://git.kernel.org/?p=linux/kernel/git/jgarzik/netdev-2.6.git;a=summary
(I hope that I'm looking in the right place).

Did you get them?

thanks
	MoniS