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authorVincent Bernat <vincent@bernat.ch>2019-07-02 20:43:54 +0300
committerDavid S. Miller <davem@davemloft.net>2019-07-04 22:30:48 +0300
commit07a4ddec3ce9b0a533b5f90f582f1057390d5e63 (patch)
tree89bf83376fd1062ec55a76b40c3e7908b12b99a5 /include/net/bonding.h
parent2368a870d6408d8a834ebb2b9f1576144c96a78f (diff)
downloadlinux-07a4ddec3ce9b0a533b5f90f582f1057390d5e63.tar.xz
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/bonding.h')
-rw-r--r--include/net/bonding.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/include/net/bonding.h b/include/net/bonding.h
index 676e7fae05a3..f7fe45689142 100644
--- a/include/net/bonding.h
+++ b/include/net/bonding.h
@@ -123,6 +123,7 @@ struct bond_params {
int fail_over_mac;
int updelay;
int downdelay;
+ int peer_notif_delay;
int lacp_fast;
unsigned int min_links;
int ad_select;