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bonding: allow notifications for bond_set_slave_link_state 

Similar to state notifications.

We allow caller to indicate if the notification should happen now or later,
depending on if he holds rtnl mutex or not. Introduce bond_slave_link_notify
function (similar to bond_slave_state_notify) which is later on called
with rtnl mutex and goes over slaves and executes delayed notification.

Signed-off-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Jiri Pirko 2015-12-03 12:12:19 +01:00 committed by David S. Miller
parent 3a0d6c5af5
commit 5d397061ca
2 changed files with 65 additions and 21 deletions
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54
drivers/net/bonding/bond_main.c
View File

@ -830,7 +830,8 @@ void bond_change_active_slave(struct bonding *bond, struct slave *new_active)
}
new_active->delay = 0;
bond_set_slave_link_state(new_active, BOND_LINK_UP);
bond_set_slave_link_state(new_active, BOND_LINK_UP,
BOND_SLAVE_NOTIFY_NOW);
if (BOND_MODE(bond) == BOND_MODE_8023AD)
bond_3ad_handle_link_change(new_active, BOND_LINK_UP);
@ -1580,21 +1581,26 @@ int bond_enslave(struct net_device *bond_dev, struct net_device *slave_dev)
if (bond_check_dev_link(bond, slave_dev, 0) == BMSR_LSTATUS) {
if (bond->params.updelay) {
bond_set_slave_link_state(new_slave,
BOND_LINK_BACK);
BOND_LINK_BACK,
BOND_SLAVE_NOTIFY_NOW);
new_slave->delay = bond->params.updelay;
} else {
bond_set_slave_link_state(new_slave,
BOND_LINK_UP);
BOND_LINK_UP,
BOND_SLAVE_NOTIFY_NOW);
}
} else {
bond_set_slave_link_state(new_slave, BOND_LINK_DOWN);
bond_set_slave_link_state(new_slave, BOND_LINK_DOWN,
BOND_SLAVE_NOTIFY_NOW);
}
} else if (bond->params.arp_interval) {
bond_set_slave_link_state(new_slave,
(netif_carrier_ok(slave_dev) ?
BOND_LINK_UP : BOND_LINK_DOWN));
BOND_LINK_UP : BOND_LINK_DOWN),
BOND_SLAVE_NOTIFY_NOW);
} else {
bond_set_slave_link_state(new_slave, BOND_LINK_UP);
bond_set_slave_link_state(new_slave, BOND_LINK_UP,
BOND_SLAVE_NOTIFY_NOW);
}
if (new_slave->link != BOND_LINK_DOWN)
@ -2013,7 +2019,8 @@ static int bond_miimon_inspect(struct bonding *bond)
if (link_state)
continue;
bond_set_slave_link_state(slave, BOND_LINK_FAIL);
bond_set_slave_link_state(slave, BOND_LINK_FAIL,
BOND_SLAVE_NOTIFY_LATER);
slave->delay = bond->params.downdelay;
if (slave->delay) {
netdev_info(bond->dev, "link status down for %sinterface %s, disabling it in %d ms\n",
@ -2028,7 +2035,8 @@ static int bond_miimon_inspect(struct bonding *bond)
case BOND_LINK_FAIL:
if (link_state) {
/* recovered before downdelay expired */
bond_set_slave_link_state(slave, BOND_LINK_UP);
bond_set_slave_link_state(slave, BOND_LINK_UP,
BOND_SLAVE_NOTIFY_LATER);
slave->last_link_up = jiffies;
netdev_info(bond->dev, "link status up again after %d ms for interface %s\n",
(bond->params.downdelay - slave->delay) *
@ -2050,7 +2058,8 @@ static int bond_miimon_inspect(struct bonding *bond)
if (!link_state)
continue;
bond_set_slave_link_state(slave, BOND_LINK_BACK);
bond_set_slave_link_state(slave, BOND_LINK_BACK,
BOND_SLAVE_NOTIFY_LATER);
slave->delay = bond->params.updelay;
if (slave->delay) {
@ -2064,7 +2073,8 @@ static int bond_miimon_inspect(struct bonding *bond)
case BOND_LINK_BACK:
if (!link_state) {
bond_set_slave_link_state(slave,
BOND_LINK_DOWN);
BOND_LINK_DOWN,
BOND_SLAVE_NOTIFY_LATER);
netdev_info(bond->dev, "link status down again after %d ms for interface %s\n",
(bond->params.updelay - slave->delay) *
bond->params.miimon,
@ -2102,7 +2112,8 @@ static void bond_miimon_commit(struct bonding *bond)
continue;
case BOND_LINK_UP:
bond_set_slave_link_state(slave, BOND_LINK_UP);
bond_set_slave_link_state(slave, BOND_LINK_UP,
BOND_SLAVE_NOTIFY_NOW);
slave->last_link_up = jiffies;
primary = rtnl_dereference(bond->primary_slave);
@ -2142,7 +2153,8 @@ static void bond_miimon_commit(struct bonding *bond)
if (slave->link_failure_count < UINT_MAX)
slave->link_failure_count++;
bond_set_slave_link_state(slave, BOND_LINK_DOWN);
bond_set_slave_link_state(slave, BOND_LINK_DOWN,
BOND_SLAVE_NOTIFY_NOW);
if (BOND_MODE(bond) == BOND_MODE_ACTIVEBACKUP ||
BOND_MODE(bond) == BOND_MODE_8023AD)
@ -2725,7 +2737,8 @@ static void bond_ab_arp_commit(struct bonding *bond)
struct slave *current_arp_slave;
current_arp_slave = rtnl_dereference(bond->current_arp_slave);
bond_set_slave_link_state(slave, BOND_LINK_UP);
bond_set_slave_link_state(slave, BOND_LINK_UP,
BOND_SLAVE_NOTIFY_NOW);
if (current_arp_slave) {
bond_set_slave_inactive_flags(
current_arp_slave,
@ -2748,7 +2761,8 @@ static void bond_ab_arp_commit(struct bonding *bond)
if (slave->link_failure_count < UINT_MAX)
slave->link_failure_count++;
bond_set_slave_link_state(slave, BOND_LINK_DOWN);
bond_set_slave_link_state(slave, BOND_LINK_DOWN,
BOND_SLAVE_NOTIFY_NOW);
bond_set_slave_inactive_flags(slave,
BOND_SLAVE_NOTIFY_NOW);
@ -2827,7 +2841,8 @@ static bool bond_ab_arp_probe(struct bonding *bond)
* up when it is actually down
*/
if (!bond_slave_is_up(slave) && slave->link == BOND_LINK_UP) {
bond_set_slave_link_state(slave, BOND_LINK_DOWN);
bond_set_slave_link_state(slave, BOND_LINK_DOWN,
BOND_SLAVE_NOTIFY_LATER);
if (slave->link_failure_count < UINT_MAX)
slave->link_failure_count++;
@ -2847,7 +2862,8 @@ static bool bond_ab_arp_probe(struct bonding *bond)
if (!new_slave)
goto check_state;
bond_set_slave_link_state(new_slave, BOND_LINK_BACK);
bond_set_slave_link_state(new_slave, BOND_LINK_BACK,
BOND_SLAVE_NOTIFY_LATER);
bond_set_slave_active_flags(new_slave, BOND_SLAVE_NOTIFY_LATER);
bond_arp_send_all(bond, new_slave);
new_slave->last_link_up = jiffies;
@ -2855,7 +2871,7 @@ static bool bond_ab_arp_probe(struct bonding *bond)
check_state:
bond_for_each_slave_rcu(bond, slave, iter) {
if (slave->should_notify) {
if (slave->should_notify || slave->should_notify_link) {
should_notify_rtnl = BOND_SLAVE_NOTIFY_NOW;
break;
}
@ -2910,8 +2926,10 @@ static void bond_activebackup_arp_mon(struct work_struct *work)
if (should_notify_peers)
call_netdevice_notifiers(NETDEV_NOTIFY_PEERS,
bond->dev);
if (should_notify_rtnl)
if (should_notify_rtnl) {
bond_slave_state_notify(bond);
bond_slave_link_notify(bond);
}
rtnl_unlock();
}

30
include/net/bonding.h
View File

@ -165,7 +165,8 @@ struct slave {
u8 backup:1, /* indicates backup slave. Value corresponds with
BOND_STATE_ACTIVE and BOND_STATE_BACKUP */
inactive:1, /* indicates inactive slave */
should_notify:1; /* indicateds whether the state changed */
should_notify:1, /* indicates whether the state changed */
should_notify_link:1; /* indicates whether the link changed */
u8 duplex;
u32 original_mtu;
u32 link_failure_count;
@ -504,10 +505,35 @@ static inline bool bond_is_slave_inactive(struct slave *slave)
return slave->inactive;
}
static inline void bond_set_slave_link_state(struct slave *slave, int state)
static inline void bond_set_slave_link_state(struct slave *slave, int state,
bool notify)
{
if (slave->link == state)
return;
slave->link = state;
if (notify) {
bond_queue_slave_event(slave);
slave->should_notify_link = 0;
} else {
if (slave->should_notify_link)
slave->should_notify_link = 0;
else
slave->should_notify_link = 1;
}
}
static inline void bond_slave_link_notify(struct bonding *bond)
{
struct list_head *iter;
struct slave *tmp;
bond_for_each_slave(bond, tmp, iter) {
if (tmp->should_notify_link) {
bond_queue_slave_event(tmp);
tmp->should_notify_link = 0;
}
}
}
static inline __be32 bond_confirm_addr(struct net_device *dev, __be32 dst, __be32 local)