Re: [mpls-linux-general] Dst_entry in MPLS implementation

[James R. L. <jl...@mi...>]

In mpls-linux 1.0 dst_entry is used ineffeciently.  Take a look at
mpls-linux 1.1xx (get it from CVS) to see how it will be used in the future.

As for you question.  Since MPLS created the dst_entry  and holds a reference
(and a reference count) for the dst_entry, it will not be deleted until
MPLS releases it.  The neighbor entry the the dst_entry points to can change
over time, but the neighbor entry deals with this.

_use is the reference count.

Jim

On Fri, Feb 15, 2002 at 02:53:07PM +0530, jagdish Garg wrote:
> Hi
> In the mpls code a new dst entry is created for each new nhlfe add request.
> The pointer of which is kept in moi. The dst_entry is further use depends on
> the mpls LSP configuration.  I have one question, suppose dst_entry is not
> used long time and it will go to the garbage list. After that if moi is used
> then what will happen?
> 
> Further I will be grateful if one can tell me the significance of _use field
> of dst_entry structure.
> 
> 
> 
> Thanks in advance
> Jagdish
> 
> 
> 
> 
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-- 
James R. Leu