RFC: expensive lookup for unlink

[Bernd Schubert <bernd.schubert@xxxxxxxxxxxxxxxxxx>]

Hello,

for a network filesystem one should try to avoid all remote operations, 
if possible. So when I just want to unlink a file, it does not make too 
much sense to first send a lookup  and once the dentry is fully 
established to unlink the file.

I think the simplest way to solve that is just to add a another 
nameidata flag (LOOKUP_UNLINK) and the file system may then just ignore 
the lookup request and fill in fake values.

Or are there any other suggestions to avoid a rather useless
network-lookup + network+unlink, so so combine it into one step?


Thanks,
Bernd


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