bonding: "primary_reselect" with "failure" is not working properly
When "primary_reselect" is set to "failure", primary interface should not become active until current active slave is down. But if we set first member of bond device as a "primary" interface and "primary_reselect" is set to "failure" then whenever primary interface's link get back(up) it become active slave even if current active slave is still up. With this patch, "bond_find_best_slave" will not traverse members if primary interface is not candidate for failover/reselection and current active slave is still up. Signed-off-by: Mazhar Rana <mazhar.rana@cyberoam.com> Signed-off-by: Jay Vosburgh <j.vosburgh@gmail.com> Signed-off-by: Jay Vosburgh <jay.vosburgh@canonical.com> Signed-off-by: David S. Miller <davem@davemloft.net>
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@ -689,40 +689,57 @@ static void bond_do_fail_over_mac(struct bonding *bond,
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}
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static bool bond_should_change_active(struct bonding *bond)
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static struct slave *bond_choose_primary_or_current(struct bonding *bond)
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{
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struct slave *prim = rtnl_dereference(bond->primary_slave);
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struct slave *curr = rtnl_dereference(bond->curr_active_slave);
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if (!prim || !curr || curr->link != BOND_LINK_UP)
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return true;
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if (!prim || prim->link != BOND_LINK_UP) {
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if (!curr || curr->link != BOND_LINK_UP)
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return NULL;
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return curr;
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}
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if (bond->force_primary) {
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bond->force_primary = false;
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return true;
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return prim;
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}
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if (!curr || curr->link != BOND_LINK_UP)
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return prim;
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/* At this point, prim and curr are both up */
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switch (bond->params.primary_reselect) {
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case BOND_PRI_RESELECT_ALWAYS:
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return prim;
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case BOND_PRI_RESELECT_BETTER:
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if (prim->speed < curr->speed)
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return curr;
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if (prim->speed == curr->speed && prim->duplex <= curr->duplex)
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return curr;
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return prim;
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case BOND_PRI_RESELECT_FAILURE:
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return curr;
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default:
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netdev_err(bond->dev, "impossible primary_reselect %d\n",
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bond->params.primary_reselect);
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return curr;
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}
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if (bond->params.primary_reselect == BOND_PRI_RESELECT_BETTER &&
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(prim->speed < curr->speed ||
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(prim->speed == curr->speed && prim->duplex <= curr->duplex)))
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return false;
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if (bond->params.primary_reselect == BOND_PRI_RESELECT_FAILURE)
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return false;
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return true;
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}
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/**
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* find_best_interface - select the best available slave to be the active one
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* bond_find_best_slave - select the best available slave to be the active one
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* @bond: our bonding struct
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*/
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static struct slave *bond_find_best_slave(struct bonding *bond)
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{
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struct slave *slave, *bestslave = NULL, *primary;
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struct slave *slave, *bestslave = NULL;
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struct list_head *iter;
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int mintime = bond->params.updelay;
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primary = rtnl_dereference(bond->primary_slave);
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if (primary && primary->link == BOND_LINK_UP &&
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bond_should_change_active(bond))
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return primary;
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slave = bond_choose_primary_or_current(bond);
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if (slave)
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return slave;
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bond_for_each_slave(bond, slave, iter) {
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if (slave->link == BOND_LINK_UP)
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