From 5d397061ca2081d8a99e4bee5792122faa6aaf86 Mon Sep 17 00:00:00 2001 From: Jiri Pirko Date: Thu, 3 Dec 2015 12:12:19 +0100 Subject: 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 Signed-off-by: David S. Miller diff --git a/drivers/net/bonding/bond_main.c b/drivers/net/bonding/bond_main.c index e94e79a..7695490 100644 --- a/drivers/net/bonding/bond_main.c +++ b/drivers/net/bonding/bond_main.c @@ -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 @@ re_arm: 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(); } diff --git a/include/net/bonding.h b/include/net/bonding.h index c1740a2..1df4377 100644 --- a/include/net/bonding.h +++ b/include/net/bonding.h @@ -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; - bond_queue_slave_event(slave); + 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) -- cgit v0.10.2