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Revert "Merge branch 'bonding_monitor_locking'" 

This reverts commit 4d961a101e, reversing
changes made to a00f6fcc7d.

Revert bond locking changes, they cause regressions and Veaceslav Falico
doesn't like how the commit messages were done at all.

Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
David S. Miller 2013-10-28 00:11:22 -04:00
parent 6384a4d0dc
commit 1f2cd845d3
3 changed files with 89 additions and 40 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

9
drivers/net/bonding/bond_3ad.c
View File

@ -2068,10 +2068,8 @@ void bond_3ad_state_machine_handler(struct work_struct *work)
struct slave *slave;
struct port *port;
if (!rtnl_trylock()) {
queue_delayed_work(bond->wq, &bond->ad_work, ad_delta_in_ticks);
return;
}
read_lock(&bond->lock);
//check if there are any slaves
if (!bond_has_slaves(bond))
goto re_arm;
@ -2124,8 +2122,9 @@ void bond_3ad_state_machine_handler(struct work_struct *work)
}
re_arm:
rtnl_unlock();
queue_delayed_work(bond->wq, &bond->ad_work, ad_delta_in_ticks);
read_unlock(&bond->lock);
}
/**

20
drivers/net/bonding/bond_alb.c
View File

@ -1495,13 +1495,11 @@ void bond_alb_monitor(struct work_struct *work)
struct list_head *iter;
struct slave *slave;
if (!rtnl_trylock())
goto re_arm;
read_lock(&bond->lock);
if (!bond_has_slaves(bond)) {
bond_info->tx_rebalance_counter = 0;
bond_info->lp_counter = 0;
rtnl_unlock();
goto re_arm;
}
@ -1550,6 +1548,16 @@ void bond_alb_monitor(struct work_struct *work)
if (bond_info->primary_is_promisc &&
(++bond_info->rlb_promisc_timeout_counter >= RLB_PROMISC_TIMEOUT)) {
/*
* dev_set_promiscuity requires rtnl and
* nothing else. Avoid race with bond_close.
*/
read_unlock(&bond->lock);
if (!rtnl_trylock()) {
read_lock(&bond->lock);
goto re_arm;
}
bond_info->rlb_promisc_timeout_counter = 0;
/* If the primary was set to promiscuous mode
@ -1558,6 +1566,9 @@ void bond_alb_monitor(struct work_struct *work)
*/
dev_set_promiscuity(bond->curr_active_slave->dev, -1);
bond_info->primary_is_promisc = 0;
rtnl_unlock();
read_lock(&bond->lock);
}
if (bond_info->rlb_rebalance) {
@ -1580,9 +1591,10 @@ void bond_alb_monitor(struct work_struct *work)
}
}
rtnl_unlock();
re_arm:
queue_delayed_work(bond->wq, &bond->alb_work, alb_delta_in_ticks);
read_unlock(&bond->lock);
}
/* assumption: called before the slave is attached to the bond

100
drivers/net/bonding/bond_main.c
View File

@ -2118,29 +2118,49 @@ void bond_mii_monitor(struct work_struct *work)
struct bonding *bond = container_of(work, struct bonding,
mii_work.work);
bool should_notify_peers = false;
unsigned long delay;
if (!rtnl_trylock())
goto re_arm;
read_lock(&bond->lock);
if (!bond_has_slaves(bond)) {
rtnl_unlock();
delay = msecs_to_jiffies(bond->params.miimon);
if (!bond_has_slaves(bond))
goto re_arm;
}
should_notify_peers = bond_should_notify_peers(bond);
if (bond_miimon_inspect(bond))
if (bond_miimon_inspect(bond)) {
read_unlock(&bond->lock);
/* Race avoidance with bond_close cancel of workqueue */
if (!rtnl_trylock()) {
read_lock(&bond->lock);
delay = 1;
should_notify_peers = false;
goto re_arm;
}
read_lock(&bond->lock);
bond_miimon_commit(bond);
if (should_notify_peers)
call_netdevice_notifiers(NETDEV_NOTIFY_PEERS, bond->dev);
rtnl_unlock();
read_unlock(&bond->lock);
rtnl_unlock(); /* might sleep, hold no other locks */
read_lock(&bond->lock);
}
re_arm:
if (bond->params.miimon)
queue_delayed_work(bond->wq, &bond->mii_work,
msecs_to_jiffies(bond->params.miimon));
queue_delayed_work(bond->wq, &bond->mii_work, delay);
read_unlock(&bond->lock);
if (should_notify_peers) {
if (!rtnl_trylock())
return;
call_netdevice_notifiers(NETDEV_NOTIFY_PEERS, bond->dev);
rtnl_unlock();
}
}
static bool bond_has_this_ip(struct bonding *bond, __be32 ip)
@ -2396,13 +2416,10 @@ void bond_loadbalance_arp_mon(struct work_struct *work)
struct list_head *iter;
int do_failover = 0;
if (!rtnl_trylock())
goto re_arm;
read_lock(&bond->lock);
if (!bond_has_slaves(bond)) {
rtnl_unlock();
if (!bond_has_slaves(bond))
goto re_arm;
}
oldcurrent = bond->curr_active_slave;
/* see if any of the previous devices are up now (i.e. they have
@ -2484,12 +2501,13 @@ void bond_loadbalance_arp_mon(struct work_struct *work)
write_unlock_bh(&bond->curr_slave_lock);
unblock_netpoll_tx();
}
rtnl_unlock();
re_arm:
if (bond->params.arp_interval)
queue_delayed_work(bond->wq, &bond->arp_work,
msecs_to_jiffies(bond->params.arp_interval));
read_unlock(&bond->lock);
}
/*
@ -2726,31 +2744,51 @@ void bond_activebackup_arp_mon(struct work_struct *work)
struct bonding *bond = container_of(work, struct bonding,
arp_work.work);
bool should_notify_peers = false;
int delta_in_ticks;
if (!rtnl_trylock())
goto re_arm;
read_lock(&bond->lock);
if (!bond_has_slaves(bond)) {
rtnl_unlock();
delta_in_ticks = msecs_to_jiffies(bond->params.arp_interval);
if (!bond_has_slaves(bond))
goto re_arm;
}
should_notify_peers = bond_should_notify_peers(bond);
if (bond_ab_arp_inspect(bond))
if (bond_ab_arp_inspect(bond)) {
read_unlock(&bond->lock);
/* Race avoidance with bond_close flush of workqueue */
if (!rtnl_trylock()) {
read_lock(&bond->lock);
delta_in_ticks = 1;
should_notify_peers = false;
goto re_arm;
}
read_lock(&bond->lock);
bond_ab_arp_commit(bond);
read_unlock(&bond->lock);
rtnl_unlock();
read_lock(&bond->lock);
}
bond_ab_arp_probe(bond);
if (should_notify_peers)
call_netdevice_notifiers(NETDEV_NOTIFY_PEERS, bond->dev);
rtnl_unlock();
re_arm:
if (bond->params.arp_interval)
queue_delayed_work(bond->wq, &bond->arp_work,
msecs_to_jiffies(bond->params.arp_interval));
queue_delayed_work(bond->wq, &bond->arp_work, delta_in_ticks);
read_unlock(&bond->lock);
if (should_notify_peers) {
if (!rtnl_trylock())
return;
call_netdevice_notifiers(NETDEV_NOTIFY_PEERS, bond->dev);
rtnl_unlock();
}
}
/*-------------------------- netdev event handling --------------------------*/