Commit c5cb002f authored by Andy Gospodarek's avatar Andy Gospodarek Committed by David S. Miller

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: default avatarAndy Gospodarek <gospo@redhat.com>
Signed-off-by: default avatarJay Vosburgh <fubar@us.ibm.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 75f5e1c6
......@@ -313,7 +313,15 @@ static ssize_t bonding_store_mode(struct device *d,
bond->dev->name, (int)strlen(buf) - 1, buf);
ret = -EINVAL;
goto out;
} else {
}
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);
......@@ -325,7 +333,6 @@ static ssize_t bonding_store_mode(struct device *d,
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;
......
Markdown is supported
0%
or
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment