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Message-Id: <cover.1332405098.git.panweiping3@gmail.com>
Date: Thu, 22 Mar 2012 16:37:49 +0800
From: Weiping Pan <panweiping3@...il.com>
To: netdev@...r.kernel.org
Cc: fubar@...ibm.com, andy@...yhouse.net, linux-kernel@...r.kernel.org,
Weiping Pan <panweiping3@...il.com>
Subject: [PATCH net V2 0/2] bonding:add aging mechanism to rlb table
Jiri Bohac(jbohac@...e.cz) found that once an IP address is recorded in the
rlb hash table, it stays there indefinitely. If this IP address is migrated
to a different host in the network, bonding still sends out ARP packets
that poison other systems' ARP caches with invalid information.
There are some attempts to fix this problem,
http://marc.info/?l=linux-netdev&m=133036407906892&w=4
http://marc.info/?l=linux-netdev&m=133057427414043&w=4
But they did not fix the root cause of the problem, that rlb table does not
have a aging mechanism, the entry is deemed valid for ever unless it is
replaced.
In this patchset I want to add aging mechanism to rlb table.
Assume RLB_MONITOR_DELAY is 2 seconds and RLB_WORK_COUNTER_TIMES is 3,
and we can tune them.
Every 6 seconds bonding will make all entries invalid.
Every 2 seconds, bonding will send arp requests to its all
clients, then if it receives corresponding arp reply, bonding will deem that
this entry is valid.
And we give a entry 3 opportunities to survive in 6 seconds.
V2:
add cover letter
Weiping Pan (2):
bonding:delete rlb entry if bond's ip is deleted
bonding:delete rlb entry at regular intervals
drivers/net/bonding/bond_alb.c | 130 ++++++++++++++++++++++++++++++++++++---
drivers/net/bonding/bond_alb.h | 9 +++
drivers/net/bonding/bond_main.c | 11 +++-
3 files changed, 138 insertions(+), 12 deletions(-)
--
1.7.4
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