Re: VFS + path walktrough

[Enrico Weigelt <weigelt@metux.de>]

* Al Viro <viro@ZenIV.linux.org.uk> wrote:

> > Symlinks are easy: filesystem just needs to *stop* the resolution the
> > moment it finds one.
> 
> That assumes you see types of objects as you do multi-step walk...

I've just read the spec for walk again:

Assuming the server doesn't resolve symlinks itself, the walk
will fail right at the symlink. So we can have a deeper look
here and try stat()'ing (adds one more request). If the fail 
point *is* an symlink, we need to properly handle it.

Would it be very complicated to give the link target back to
VFS and let the lookup start again (w/ new name) ?

> No - you need inodes as well (i.e. as the absolute least you want
> mode and ownership).  Which is to say, you need to issue stat on
> each component in such situation anyway.  Not a win...

Naive question: is it really *necessary* to have all the 
intermediate dirs in dcache ?


cu
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