ipvs: Restrict sync message to 255 connections

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The nr_conns variable in the sync message header is only eight bits wide
and will overflow on interfaces with a large MTU. As a result the backup
won't parse all connections contained in the sync buffer. On regular
ethernet with an MTU of 1500 this isn't a problem, because we can't
overflow the value, but consider jumbo frames being used on a cross-over
connection between both directors.

We now restrict the size of the sync buffer, so that we never put more
than 255 connections into a single sync buffer.

Signed-off-by: Sven Wegener <sven.wegener@stealer.net>
Signed-off-by: Simon Horman <horms@verge.net.au>

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Sven Wegener 2008-09-19 20:41:56 +02:00 • committed by Simon Horman

parent f5fff5dc8a

commit e6f225ebb7

1 changed files with 4 additions and 2 deletions

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net/ipv4/ipvs/ip_vs_sync.c

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