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| author | Vincent Bernat <vincent@bernat.ch> | 2019-07-02 19:43:54 +0200 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2019-07-04 12:30:48 -0700 |
| commit | 07a4ddec3ce9b0a533b5f90f582f1057390d5e63 (patch) | |
| tree | 89bf83376fd1062ec55a76b40c3e7908b12b99a5 /include/net/bond_options.h | |
| parent | 2368a870d6408d8a834ebb2b9f1576144c96a78f (diff) | |
| download | lwn-07a4ddec3ce9b0a533b5f90f582f1057390d5e63.tar.gz lwn-07a4ddec3ce9b0a533b5f90f582f1057390d5e63.zip | |
bonding: add an option to specify a delay between peer notifications
Currently, gratuitous ARP/ND packets are sent every `miimon'
milliseconds. This commit allows a user to specify a custom delay
through a new option, `peer_notif_delay'.
Like for `updelay' and `downdelay', this delay should be a multiple of
`miimon' to avoid managing an additional work queue. The configuration
logic is copied from `updelay' and `downdelay'. However, the default
value cannot be set using a module parameter: Netlink or sysfs should
be used to configure this feature.
When setting `miimon' to 100 and `peer_notif_delay' to 500, we can
observe the 500 ms delay is respected:
20:30:19.354693 ARP, Request who-has 203.0.113.10 tell 203.0.113.10, length 28
20:30:19.874892 ARP, Request who-has 203.0.113.10 tell 203.0.113.10, length 28
20:30:20.394919 ARP, Request who-has 203.0.113.10 tell 203.0.113.10, length 28
20:30:20.914963 ARP, Request who-has 203.0.113.10 tell 203.0.113.10, length 28
In bond_mii_monitor(), I have tried to keep the lock logic readable.
The change is due to the fact we cannot rely on a notification to
lower the value of `bond->send_peer_notif' as `NETDEV_NOTIFY_PEERS' is
only triggered once every N times, while we need to decrement the
counter each time.
iproute2 also needs to be updated to be able to specify this new
attribute through `ip link'.
Signed-off-by: Vincent Bernat <vincent@bernat.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include/net/bond_options.h')
| -rw-r--r-- | include/net/bond_options.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/include/net/bond_options.h b/include/net/bond_options.h index 2a05cc349018..9d382f2f0bc5 100644 --- a/include/net/bond_options.h +++ b/include/net/bond_options.h @@ -63,6 +63,7 @@ enum { BOND_OPT_AD_ACTOR_SYSTEM, BOND_OPT_AD_USER_PORT_KEY, BOND_OPT_NUM_PEER_NOTIF_ALIAS, + BOND_OPT_PEER_NOTIF_DELAY, BOND_OPT_LAST }; |