[tahoe-dev] [tahoe-lafs] #833: reject mutable children when *reading* an immutable dirnode

[tahoe-lafs]

#833: reject mutable children when *reading* an immutable dirnode
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 Reporter:  warner                           |           Owner:  warner  
     Type:  defect                           |          Status:  assigned
 Priority:  critical                         |       Milestone:  1.6.0   
Component:  code-dirnodes                    |         Version:  1.5.0   
 Keywords:  integrity forward-compatibility  |   Launchpad_bug:          
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Changes (by davidsarah):

  * keywords:  integrity => integrity forward-compatibility


Comment:

 Replying to [comment:7 warner]:
 > I guess it comes down to how we deal with caps-from-the-future. We can't
 distinguish between mutable-caps-from-the-future and immutable-caps-from-
 the-future, since we can't figure out anything about caps-from-the-future
 other than the fact that we don't understand them. So if we want to
 promise users who are listing an immutable directory that they'll only see
 immutable caps, we'd have to filter out anything that we don't explicitly
 recognize as immutable, which means removing all caps-from-the-future.

 Not necessarily. If the directory is immutable, we could just omit
 {{{rw_uri}}}.

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Ticket URL: <http://allmydata.org/trac/tahoe/ticket/833#comment:8>
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