[PATCH] bonding:avoid repeated display of same link status change

From: mk . singh
Date: Wed Oct 31 2018 - 06:58:58 EST


From: Manish Kumar Singh <mk.singh@xxxxxxxxxx>

When link status change needs to be committed and rtnl lock couldn't be
taken, avoid redisplay of same link status change message.

Signed-off-by: Manish Kumar Singh <mk.singh@xxxxxxxxxx>
---
drivers/net/bonding/bond_main.c | 8 ++++++--
include/net/bonding.h | 1 +
2 files changed, 7 insertions(+), 2 deletions(-)

diff --git a/drivers/net/bonding/bond_main.c b/drivers/net/bonding/bond_main.c
index 2b01180be834..b3d95c7040ac 100644
--- a/drivers/net/bonding/bond_main.c
+++ b/drivers/net/bonding/bond_main.c
@@ -2096,7 +2096,8 @@ static int bond_miimon_inspect(struct bonding *bond)
bond_propose_link_state(slave, BOND_LINK_FAIL);
commit++;
slave->delay = bond->params.downdelay;
- if (slave->delay) {
+ if (slave->delay &&
+ !atomic64_read(&bond->rtnl_needed)) {
netdev_info(bond->dev, "link status down for %sinterface %s, disabling it in %d ms\n",
(BOND_MODE(bond) ==
BOND_MODE_ACTIVEBACKUP) ?
@@ -2136,7 +2137,8 @@ static int bond_miimon_inspect(struct bonding *bond)
commit++;
slave->delay = bond->params.updelay;

- if (slave->delay) {
+ if (slave->delay &&
+ !atomic64_read(&bond->rtnl_needed)) {
netdev_info(bond->dev, "link status up for interface %s, enabling it in %d ms\n",
slave->dev->name,
ignore_updelay ? 0 :
@@ -2310,9 +2312,11 @@ static void bond_mii_monitor(struct work_struct *work)
if (!rtnl_trylock()) {
delay = 1;
should_notify_peers = false;
+ atomic64_set(&bond->rtnl_needed, 1);
goto re_arm;
}

+ atomic64_set(&bond->rtnl_needed, 0);
bond_for_each_slave(bond, slave, iter) {
bond_commit_link_state(slave, BOND_SLAVE_NOTIFY_LATER);
}
diff --git a/include/net/bonding.h b/include/net/bonding.h
index a4f116f06c50..20c3c875266f 100644
--- a/include/net/bonding.h
+++ b/include/net/bonding.h
@@ -229,6 +229,7 @@ struct bonding {
struct dentry *debug_dir;
#endif /* CONFIG_DEBUG_FS */
struct rtnl_link_stats64 bond_stats;
+ atomic64_t rtnl_needed;
};

#define bond_slave_get_rcu(dev) \
--
2.14.1