/*-------------------------------- Monitoring -------------------------------*/
-/*
- * if !have_locks, return nonzero if a failover is necessary. if
- * have_locks, do whatever failover activities are needed.
- *
- * This is to separate the inspection and failover steps for locking
- * purposes; failover requires rtnl, but acquiring it for every
- * inspection is undesirable, so a wrapper first does inspection, and
- * the acquires the necessary locks and calls again to perform
- * failover if needed. Since all locks are dropped, a complete
- * restart is needed between calls.
- */
-static int __bond_mii_monitor(struct bonding *bond, int have_locks)
-{
- struct slave *slave, *oldcurrent;
- int do_failover = 0;
- int i;
-
- if (bond->slave_cnt == 0)
- goto out;
- /* we will try to read the link status of each of our slaves, and
- * set their IFF_RUNNING flag appropriately. For each slave not
- * supporting MII status, we won't do anything so that a user-space
- * program could monitor the link itself if needed.
- */
-
- read_lock(&bond->curr_slave_lock);
- oldcurrent = bond->curr_active_slave;
- read_unlock(&bond->curr_slave_lock);
+static int bond_miimon_inspect(struct bonding *bond)
+{
+ struct slave *slave;
+ int i, link_state, commit = 0;
bond_for_each_slave(bond, slave, i) {
- struct net_device *slave_dev = slave->dev;
- int link_state;
- u16 old_speed = slave->speed;
- u8 old_duplex = slave->duplex;
+ slave->new_link = BOND_LINK_NOCHANGE;
- link_state = bond_check_dev_link(bond, slave_dev, 0);
+ link_state = bond_check_dev_link(bond, slave->dev, 0);
switch (slave->link) {
- case BOND_LINK_UP: /* the link was up */
- if (link_state == BMSR_LSTATUS) {
- if (!oldcurrent) {
- if (!have_locks)
- return 1;
- do_failover = 1;
- }
- break;
- } else { /* link going down */
- slave->link = BOND_LINK_FAIL;
- slave->delay = bond->params.downdelay;
-
- if (slave->link_failure_count < UINT_MAX) {
- slave->link_failure_count++;
- }
+ case BOND_LINK_UP:
+ if (link_state)
+ continue;
- if (bond->params.downdelay) {
- printk(KERN_INFO DRV_NAME
- ": %s: link status down for %s "
- "interface %s, disabling it in "
- "%d ms.\n",
- bond->dev->name,
- IS_UP(slave_dev)
- ? ((bond->params.mode == BOND_MODE_ACTIVEBACKUP)
- ? ((slave == oldcurrent)
- ? "active " : "backup ")
- : "")
- : "idle ",
- slave_dev->name,
- bond->params.downdelay * bond->params.miimon);
- }
+ slave->link = BOND_LINK_FAIL;
+ slave->delay = bond->params.downdelay;
+ if (slave->delay) {
+ printk(KERN_INFO DRV_NAME
+ ": %s: link status down for %s"
+ "interface %s, disabling it in %d ms.\n",
+ bond->dev->name,
+ (bond->params.mode ==
+ BOND_MODE_ACTIVEBACKUP) ?
+ ((slave->state == BOND_STATE_ACTIVE) ?
+ "active " : "backup ") : "",
+ slave->dev->name,
+ bond->params.downdelay * bond->params.miimon);
}
- /* no break ! fall through the BOND_LINK_FAIL test to
- ensure proper action to be taken
- */
- case BOND_LINK_FAIL: /* the link has just gone down */
- if (link_state != BMSR_LSTATUS) {
- /* link stays down */
- if (slave->delay <= 0) {
- if (!have_locks)
- return 1;
-
- /* link down for too long time */
- slave->link = BOND_LINK_DOWN;
-
- /* in active/backup mode, we must
- * completely disable this interface
- */
- if ((bond->params.mode == BOND_MODE_ACTIVEBACKUP) ||
- (bond->params.mode == BOND_MODE_8023AD)) {
- bond_set_slave_inactive_flags(slave);
- }
-
- printk(KERN_INFO DRV_NAME
- ": %s: link status definitely "
- "down for interface %s, "
- "disabling it\n",
- bond->dev->name,
- slave_dev->name);
-
- /* notify ad that the link status has changed */
- if (bond->params.mode == BOND_MODE_8023AD) {
- bond_3ad_handle_link_change(slave, BOND_LINK_DOWN);
- }
-
- if ((bond->params.mode == BOND_MODE_TLB) ||
- (bond->params.mode == BOND_MODE_ALB)) {
- bond_alb_handle_link_change(bond, slave, BOND_LINK_DOWN);
- }
-
- if (slave == oldcurrent) {
- do_failover = 1;
- }
- } else {
- slave->delay--;
- }
- } else {
- /* link up again */
- slave->link = BOND_LINK_UP;
+ /*FALLTHRU*/
+ case BOND_LINK_FAIL:
+ if (link_state) {
+ /*
+ * recovered before downdelay expired
+ */
+ slave->link = BOND_LINK_UP;
slave->jiffies = jiffies;
printk(KERN_INFO DRV_NAME
": %s: link status up again after %d "
"ms for interface %s.\n",
bond->dev->name,
- (bond->params.downdelay - slave->delay) * bond->params.miimon,
- slave_dev->name);
+ (bond->params.downdelay - slave->delay) *
+ bond->params.miimon,
+ slave->dev->name);
+ continue;
}
- break;
- case BOND_LINK_DOWN: /* the link was down */
- if (link_state != BMSR_LSTATUS) {
- /* the link stays down, nothing more to do */
- break;
- } else { /* link going up */
- slave->link = BOND_LINK_BACK;
- slave->delay = bond->params.updelay;
- if (bond->params.updelay) {
- /* if updelay == 0, no need to
- advertise about a 0 ms delay */
- printk(KERN_INFO DRV_NAME
- ": %s: link status up for "
- "interface %s, enabling it "
- "in %d ms.\n",
- bond->dev->name,
- slave_dev->name,
- bond->params.updelay * bond->params.miimon);
- }
+ if (slave->delay <= 0) {
+ slave->new_link = BOND_LINK_DOWN;
+ commit++;
+ continue;
}
- /* no break ! fall through the BOND_LINK_BACK state in
- case there's something to do.
- */
- case BOND_LINK_BACK: /* the link has just come back */
- if (link_state != BMSR_LSTATUS) {
- /* link down again */
- slave->link = BOND_LINK_DOWN;
+ slave->delay--;
+ break;
+
+ case BOND_LINK_DOWN:
+ if (!link_state)
+ continue;
+
+ slave->link = BOND_LINK_BACK;
+ slave->delay = bond->params.updelay;
+
+ if (slave->delay) {
+ printk(KERN_INFO DRV_NAME
+ ": %s: link status up for "
+ "interface %s, enabling it in %d ms.\n",
+ bond->dev->name, slave->dev->name,
+ bond->params.updelay *
+ bond->params.miimon);
+ }
+ /*FALLTHRU*/
+ case BOND_LINK_BACK:
+ if (!link_state) {
+ slave->link = BOND_LINK_DOWN;
printk(KERN_INFO DRV_NAME
": %s: link status down again after %d "
"ms for interface %s.\n",
bond->dev->name,
- (bond->params.updelay - slave->delay) * bond->params.miimon,
- slave_dev->name);
- } else {
- /* link stays up */
- if (slave->delay == 0) {
- if (!have_locks)
- return 1;
-
- /* now the link has been up for long time enough */
- slave->link = BOND_LINK_UP;
- slave->jiffies = jiffies;
-
- if (bond->params.mode == BOND_MODE_8023AD) {
- /* prevent it from being the active one */
- slave->state = BOND_STATE_BACKUP;
- } else if (bond->params.mode != BOND_MODE_ACTIVEBACKUP) {
- /* make it immediately active */
- slave->state = BOND_STATE_ACTIVE;
- } else if (slave != bond->primary_slave) {
- /* prevent it from being the active one */
- slave->state = BOND_STATE_BACKUP;
- }
+ (bond->params.updelay - slave->delay) *
+ bond->params.miimon,
+ slave->dev->name);
- printk(KERN_INFO DRV_NAME
- ": %s: link status definitely "
- "up for interface %s.\n",
- bond->dev->name,
- slave_dev->name);
-
- /* notify ad that the link status has changed */
- if (bond->params.mode == BOND_MODE_8023AD) {
- bond_3ad_handle_link_change(slave, BOND_LINK_UP);
- }
-
- if ((bond->params.mode == BOND_MODE_TLB) ||
- (bond->params.mode == BOND_MODE_ALB)) {
- bond_alb_handle_link_change(bond, slave, BOND_LINK_UP);
- }
-
- if ((!oldcurrent) ||
- (slave == bond->primary_slave)) {
- do_failover = 1;
- }
- } else {
- slave->delay--;
- }
+ continue;
}
+
+ if (slave->delay <= 0) {
+ slave->new_link = BOND_LINK_UP;
+ commit++;
+ continue;
+ }
+
+ slave->delay--;
break;
- default:
- /* Should not happen */
- printk(KERN_ERR DRV_NAME
- ": %s: Error: %s Illegal value (link=%d)\n",
- bond->dev->name,
- slave->dev->name,
- slave->link);
- goto out;
- } /* end of switch (slave->link) */
+ }
+ }
- bond_update_speed_duplex(slave);
+ return commit;
+}
- if (bond->params.mode == BOND_MODE_8023AD) {
- if (old_speed != slave->speed) {
- bond_3ad_adapter_speed_changed(slave);
- }
+static void bond_miimon_commit(struct bonding *bond)
+{
+ struct slave *slave;
+ int i;
+
+ bond_for_each_slave(bond, slave, i) {
+ switch (slave->new_link) {
+ case BOND_LINK_NOCHANGE:
+ continue;
+
+ case BOND_LINK_UP:
+ slave->link = BOND_LINK_UP;
+ slave->jiffies = jiffies;
- if (old_duplex != slave->duplex) {
- bond_3ad_adapter_duplex_changed(slave);
+ if (bond->params.mode == BOND_MODE_8023AD) {
+ /* prevent it from being the active one */
+ slave->state = BOND_STATE_BACKUP;
+ } else if (bond->params.mode != BOND_MODE_ACTIVEBACKUP) {
+ /* make it immediately active */
+ slave->state = BOND_STATE_ACTIVE;
+ } else if (slave != bond->primary_slave) {
+ /* prevent it from being the active one */
+ slave->state = BOND_STATE_BACKUP;
}
- }
- } /* end of for */
+ printk(KERN_INFO DRV_NAME
+ ": %s: link status definitely "
+ "up for interface %s.\n",
+ bond->dev->name, slave->dev->name);
- if (do_failover) {
- ASSERT_RTNL();
+ /* notify ad that the link status has changed */
+ if (bond->params.mode == BOND_MODE_8023AD)
+ bond_3ad_handle_link_change(slave, BOND_LINK_UP);
- write_lock_bh(&bond->curr_slave_lock);
+ if ((bond->params.mode == BOND_MODE_TLB) ||
+ (bond->params.mode == BOND_MODE_ALB))
+ bond_alb_handle_link_change(bond, slave,
+ BOND_LINK_UP);
- bond_select_active_slave(bond);
+ if (!bond->curr_active_slave ||
+ (slave == bond->primary_slave))
+ goto do_failover;
- write_unlock_bh(&bond->curr_slave_lock);
+ continue;
- } else
- bond_set_carrier(bond);
+ case BOND_LINK_DOWN:
+ slave->link = BOND_LINK_DOWN;
-out:
- return 0;
+ if (bond->params.mode == BOND_MODE_ACTIVEBACKUP ||
+ bond->params.mode == BOND_MODE_8023AD)
+ bond_set_slave_inactive_flags(slave);
+
+ printk(KERN_INFO DRV_NAME
+ ": %s: link status definitely down for "
+ "interface %s, disabling it\n",
+ bond->dev->name, slave->dev->name);
+
+ if (bond->params.mode == BOND_MODE_8023AD)
+ bond_3ad_handle_link_change(slave,
+ BOND_LINK_DOWN);
+
+ if (bond->params.mode == BOND_MODE_TLB ||
+ bond->params.mode == BOND_MODE_ALB)
+ bond_alb_handle_link_change(bond, slave,
+ BOND_LINK_DOWN);
+
+ if (slave == bond->curr_active_slave)
+ goto do_failover;
+
+ continue;
+
+ default:
+ printk(KERN_ERR DRV_NAME
+ ": %s: invalid new link %d on slave %s\n",
+ bond->dev->name, slave->new_link,
+ slave->dev->name);
+ slave->new_link = BOND_LINK_NOCHANGE;
+
+ continue;
+ }
+
+do_failover:
+ ASSERT_RTNL();
+ write_lock_bh(&bond->curr_slave_lock);
+ bond_select_active_slave(bond);
+ write_unlock_bh(&bond->curr_slave_lock);
+ }
+
+ bond_set_carrier(bond);
}
/*
* bond_mii_monitor
*
* Really a wrapper that splits the mii monitor into two phases: an
- * inspection, then (if inspection indicates something needs to be
- * done) an acquisition of appropriate locks followed by another pass
- * to implement whatever link state changes are indicated.
+ * inspection, then (if inspection indicates something needs to be done)
+ * an acquisition of appropriate locks followed by a commit phase to
+ * implement whatever link state changes are indicated.
*/
void bond_mii_monitor(struct work_struct *work)
{
struct bonding *bond = container_of(work, struct bonding,
mii_work.work);
- unsigned long delay;
read_lock(&bond->lock);
- if (bond->kill_timers) {
- read_unlock(&bond->lock);
- return;
- }
+ if (bond->kill_timers)
+ goto out;
+
+ if (bond->slave_cnt == 0)
+ goto re_arm;
if (bond->send_grat_arp) {
read_lock(&bond->curr_slave_lock);
read_unlock(&bond->curr_slave_lock);
}
- if (__bond_mii_monitor(bond, 0)) {
+ if (bond_miimon_inspect(bond)) {
read_unlock(&bond->lock);
rtnl_lock();
read_lock(&bond->lock);
- __bond_mii_monitor(bond, 1);
+
+ bond_miimon_commit(bond);
+
read_unlock(&bond->lock);
rtnl_unlock(); /* might sleep, hold no other locks */
read_lock(&bond->lock);
}
- delay = msecs_to_jiffies(bond->params.miimon);
+re_arm:
+ if (bond->params.miimon)
+ queue_delayed_work(bond->wq, &bond->mii_work,
+ msecs_to_jiffies(bond->params.miimon));
+out:
read_unlock(&bond->lock);
- queue_delayed_work(bond->wq, &bond->mii_work, delay);
}
static __be32 bond_glean_dev_ip(struct net_device *dev)
projects / linux-2.6 / commitdiff