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bonding: prevent sysfs from allowing arp monitoring with alb/tlb 

When using module options arp monitoring and balance-alb/balance-tlb
are mutually exclusive options.  Anytime balance-alb/balance-tlb are
enabled mii monitoring is forced to 100ms if not set.  When configuring
via sysfs no checking is currently done.

Handling these cases with sysfs has to be done a bit differently because
we do not have all configuration information available at once.  This
patch will not allow a mode change to balance-alb/balance-tlb if
arp_interval is already non-zero.  It will also not allow the user to
set a non-zero arp_interval value if the mode is already set to
balance-alb/balance-tlb.  They are still mutually exclusive on a
first-come, first serve basis.

Tested with initscripts on Fedora and manual setting via sysfs.

Signed-off-by: Andy Gospodarek <gospo@redhat.com>
Signed-off-by: Jay Vosburgh <fubar@us.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Andy Gospodarek 2010-07-28 15:13:56 +00:00 committed by David S. Miller
parent 75f5e1c6f6
commit c5cb002fb0
1 changed files with 26 additions and 13 deletions
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39
drivers/net/bonding/bond_sysfs.c
View File

@ -313,19 +313,26 @@ static ssize_t bonding_store_mode(struct device *d,
bond->dev->name, (int)strlen(buf) - 1, buf);
ret = -EINVAL;
goto out;
} else {
if (bond->params.mode == BOND_MODE_8023AD)
bond_unset_master_3ad_flags(bond);
if (bond->params.mode == BOND_MODE_ALB)
bond_unset_master_alb_flags(bond);
bond->params.mode = new_value;
bond_set_mode_ops(bond, bond->params.mode);
pr_info("%s: setting mode to %s (%d).\n",
bond->dev->name, bond_mode_tbl[new_value].modename,
new_value);
}
if ((new_value == BOND_MODE_ALB ||
new_value == BOND_MODE_TLB) &&
bond->params.arp_interval) {
pr_err("%s: %s mode is incompatible with arp monitoring.\n",
bond->dev->name, bond_mode_tbl[new_value].modename);
ret = -EINVAL;
goto out;
}
if (bond->params.mode == BOND_MODE_8023AD)
bond_unset_master_3ad_flags(bond);
if (bond->params.mode == BOND_MODE_ALB)
bond_unset_master_alb_flags(bond);
bond->params.mode = new_value;
bond_set_mode_ops(bond, bond->params.mode);
pr_info("%s: setting mode to %s (%d).\n",
bond->dev->name, bond_mode_tbl[new_value].modename,
new_value);
out:
return ret;
}
@ -510,7 +517,13 @@ static ssize_t bonding_store_arp_interval(struct device *d,
ret = -EINVAL;
goto out;
}
if (bond->params.mode == BOND_MODE_ALB ||
bond->params.mode == BOND_MODE_TLB) {
pr_info("%s: ARP monitoring cannot be used with ALB/TLB. Only MII monitoring is supported on %s.\n",
bond->dev->name, bond->dev->name);
ret = -EINVAL;
goto out;
}
pr_info("%s: Setting ARP monitoring interval to %d.\n",
bond->dev->name, new_value);
bond->params.arp_interval = new_value;