diff options
| author | Xin Long <lucien.xin@gmail.com> | 2017-10-15 18:13:45 +0800 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2017-10-16 20:48:45 +0100 |
| commit | 64ff90cc2e6f42596d7a0c37e41dc95292bb63b1 (patch) | |
| tree | e54399965691ebc190697fbfb461b07426bef3c2 /net/core/rtnetlink.c | |
| parent | dc709f375743ebf5c9326cc9b946f6f09a34ac44 (diff) | |
| download | lwn-64ff90cc2e6f42596d7a0c37e41dc95292bb63b1.tar.gz lwn-64ff90cc2e6f42596d7a0c37e41dc95292bb63b1.zip | |
rtnetlink: check DO_SETLINK_NOTIFY correctly in do_setlink
The check 'status & DO_SETLINK_NOTIFY' in do_setlink doesn't really
work after status & DO_SETLINK_MODIFIED, as:
DO_SETLINK_MODIFIED 0x1
DO_SETLINK_NOTIFY 0x3
Considering that notifications are suppposed to be sent only when
status have the flag DO_SETLINK_NOTIFY, the right check would be:
(status & DO_SETLINK_NOTIFY) == DO_SETLINK_NOTIFY
This would avoid lots of duplicated notifications when setting some
properties of a link.
Fixes: ba9989069f4e ("rtnl/do_setlink(): notify when a netdev is modified")
Signed-off-by: Xin Long <lucien.xin@gmail.com>
Acked-by: David Ahern <dsahern@gmail.com>
Acked-by: Nicolas Dichtel <nicolas.dichtel@6wind.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/core/rtnetlink.c')
| -rw-r--r-- | net/core/rtnetlink.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/net/core/rtnetlink.c b/net/core/rtnetlink.c index ab98c1c8b6f3..3e98fb557598 100644 --- a/net/core/rtnetlink.c +++ b/net/core/rtnetlink.c @@ -2248,7 +2248,7 @@ static int do_setlink(const struct sk_buff *skb, errout: if (status & DO_SETLINK_MODIFIED) { - if (status & DO_SETLINK_NOTIFY) + if ((status & DO_SETLINK_NOTIFY) == DO_SETLINK_NOTIFY) netdev_state_change(dev); if (err < 0) |