diff options
| author | nikolay@redhat.com <nikolay@redhat.com> | 2013-09-02 13:51:40 +0200 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2013-09-04 00:27:24 -0400 |
| commit | c509316b5b33664b08b2a40d09534e0bd3c6b648 (patch) | |
| tree | 3769e355a452894b9eaa4694f0486670c8adde64 | |
| parent | ee8487c0e1aed52b534f9bf31d3934af4c50bf33 (diff) | |
bonding: simplify bond_3ad_update_lacp_rate and use RTNL for sync
We can drop the use of bond->lock for mutual exclusion in
bond_3ad_update_lacp_rate and use RTNL in the sysfs store function
instead. This way we'll prevent races with mode change and interface
up/down as well as simplify update_lacp_rate by removing the check for
port->slave because it'll always be initialized (done while enslaving
with RTNL). This change will also help in the future removal of reader
bond->lock from bond_enslave.
Signed-off-by: Nikolay Aleksandrov <nikolay@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
| -rw-r--r-- | drivers/net/bonding/bond_3ad.c | 8 | ||||
| -rw-r--r-- | drivers/net/bonding/bond_sysfs.c | 7 |
2 files changed, 7 insertions, 8 deletions
diff --git a/drivers/net/bonding/bond_3ad.c b/drivers/net/bonding/bond_3ad.c index 90102652c82a..0d8f427ade93 100644 --- a/drivers/net/bonding/bond_3ad.c +++ b/drivers/net/bonding/bond_3ad.c @@ -2514,17 +2514,13 @@ int bond_3ad_lacpdu_recv(const struct sk_buff *skb, struct bonding *bond, */ void bond_3ad_update_lacp_rate(struct bonding *bond) { - struct slave *slave; struct port *port = NULL; + struct slave *slave; int lacp_fast; - write_lock_bh(&bond->lock); lacp_fast = bond->params.lacp_fast; - bond_for_each_slave(bond, slave) { port = &(SLAVE_AD_INFO(slave).port); - if (port->slave == NULL) - continue; __get_state_machine_lock(port); if (lacp_fast) port->actor_oper_port_state |= AD_STATE_LACP_TIMEOUT; @@ -2532,6 +2528,4 @@ void bond_3ad_update_lacp_rate(struct bonding *bond) port->actor_oper_port_state &= ~AD_STATE_LACP_TIMEOUT; __release_state_machine_lock(port); } - - write_unlock_bh(&bond->lock); } diff --git a/drivers/net/bonding/bond_sysfs.c b/drivers/net/bonding/bond_sysfs.c index 0f539de640dc..ce4677668e2c 100644 --- a/drivers/net/bonding/bond_sysfs.c +++ b/drivers/net/bonding/bond_sysfs.c @@ -852,8 +852,11 @@ static ssize_t bonding_store_lacp(struct device *d, struct device_attribute *attr, const char *buf, size_t count) { - int new_value, ret = count; struct bonding *bond = to_bond(d); + int new_value, ret = count; + + if (!rtnl_trylock()) + return restart_syscall(); if (bond->dev->flags & IFF_UP) { pr_err("%s: Unable to update LACP rate because interface is up.\n", @@ -883,6 +886,8 @@ static ssize_t bonding_store_lacp(struct device *d, ret = -EINVAL; } out: + rtnl_unlock(); + return ret; } static DEVICE_ATTR(lacp_rate, S_IRUGO | S_IWUSR, |