Re: VFS + path walktrough

[Enrico Weigelt]

* Enrico Weigelt <weigelt@xxxxxxxx> wrote:

> Lets say we open /a/b/c/d and /a is mounted w/ some network 
> filesystem (eg. 9P). Who exactly does the walktrough from b to d ?
> The individual filesystem or VFS ?
> 
> The point is: the 9P protocol can work with whole pathnames, so
> the client doesn't have to do the walkthrough manually - this
> can heavily reduce traffic and latency. I'd like the 9P fs driver
> to directly use this, if VFS can send the whole pathname at once.

I've digget somebit in the source and found out that it goes 
down to link_path_walk(). It seems to split the pathname into 
components and walk through them one by one.

We could just add another call vector to struct file_operations,
as replacement for link_path_walk() - if it's zero, the original
function is used. This way an filesystem can do the walktrough
by it's own, but doesn't need to.


What do you think about this ?


cu
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