xiaomi-sm8450/android_kernel_xiaomi_sm8450
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

bonding: Prevent duplicate userspace notification

Browse Source 
Whenever a user changes bonding options, a NETDEV_CHANGEINFODATA
notificatin is generated which results in a rtnelink message to
be sent.  While runnig 'ip monitor', we can actually see 2 messages,
one a result of the event, and the other a result of state change
that is generated bo netdev_state_change().  However, this is not
always the case. If bonding changes were done via sysfs or ifenslave
(old ioctl interface), then only 1 message is seen.

This patch removes duplicate messages in the case of using netlink
to configure bonding.  It introduceds a separte function that
triggers a netdev event and uses that function in the syfs and ioctl
cases.

This was discovered while auditing all the different envents and
continues the effort of cleaning up duplicated netlink messages.

CC: David Ahern <dsa@cumulusnetworks.com>
CC: Jiri Pirko <jiri@resnulli.us>
Signed-off-by: Vladislav Yasevich <vyasevic@redhat.com>
Acked-by: David Ahern <dsahern@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Vlad Yasevich
2017-05-27 10:14:35 -04:00
committed by David S. Miller
parent 3d3ea5af5c
commit 7a7e96e09d
3 changed files with 29 additions and 3 deletions
Download Patch File Download Diff File Expand all files Collapse all files

3
drivers/net/bonding/bond_main.c
View File

@@ -3488,7 +3488,8 @@ static int bond_do_ioctl(struct net_device *bond_dev, struct ifreq *ifr, int cmd
case BOND_CHANGE_ACTIVE_OLD:
case SIOCBONDCHANGEACTIVE:
bond_opt_initstr(&newval, slave_dev->name);
res = __bond_opt_set(bond, BOND_OPT_ACTIVE_SLAVE, &newval);
res = __bond_opt_set_notify(bond, BOND_OPT_ACTIVE_SLAVE,
&newval);
break;
default:
res = -EOPNOTSUPP;