net: Abstract default MTU metric calculation behind an accessor.

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Like RTAX_ADVMSS, make the default calculation go through a dst_ops
method rather than caching the computation in the routing cache
entries.

Now dst metrics are pretty much left as-is when new entries are
created, thus optimizing metric sharing becomes a real possibility.

Signed-off-by: David S. Miller <davem@davemloft.net>

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David S. Miller 2010-12-14 13:01:14 -08:00

parent 9fe146aef4

commit d33e455337

6 changed files with 60 additions and 39 deletions

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15

include/net/dst.h

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1

include/net/dst_ops.h

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