bonding: Allow setting max_bonds to zero
Permit bonding to function rationally if max_bonds is set to
zero. This will load the module, but create no master devices (which can
be created via sysfs).
Requires some change to bond_create_sysfs; currently, the
netdev sysfs directory is determined from the first bonding device created,
but this is no longer possible. Instead, an interface from net/core is
created to create and destroy files in net_class.
Based on a patch submitted by Phil Oester <kernel@linuxaces.com>.
Modified by Jay Vosburgh to fix the sysfs issue mentioned above and to
update the documentation.
Signed-off-by: Phil Oester <kernel@linuxace.com>
Signed-off-by: Jay Vosburgh <fubar@us.ibm.com>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
diff --git a/drivers/net/bonding/bond_main.c b/drivers/net/bonding/bond_main.c
index 3b6d66a..d57b65d 100644
--- a/drivers/net/bonding/bond_main.c
+++ b/drivers/net/bonding/bond_main.c
@@ -4750,11 +4750,11 @@
}
}
- if (max_bonds < 1 || max_bonds > INT_MAX) {
+ if (max_bonds < 0 || max_bonds > INT_MAX) {
printk(KERN_WARNING DRV_NAME
": Warning: max_bonds (%d) not in range %d-%d, so it "
"was reset to BOND_DEFAULT_MAX_BONDS (%d)\n",
- max_bonds, 1, INT_MAX, BOND_DEFAULT_MAX_BONDS);
+ max_bonds, 0, INT_MAX, BOND_DEFAULT_MAX_BONDS);
max_bonds = BOND_DEFAULT_MAX_BONDS;
}
@@ -4953,7 +4953,7 @@
printk("\n");
- } else {
+ } else if (max_bonds) {
/* miimon and arp_interval not set, we need one so things
* work as expected, see bonding.txt for details
*/