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List:       fuse-devel
Subject:    Re: [fuse-devel] How to implement virtual dirs in FUSE high level?
From:       "Sundar Sridharan" <sundar84 () gmail ! com>
Date:       2008-03-31 21:13:30
Message-ID: a37756360803311413m5e920877j92b3d8473f875515 () mail ! gmail ! com
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Thanks, Miklos, patching getattr() call appears to work !

But, since my FS partitions a user's directory in multiple directories on
remote NFS mounted servers,
could you tell me if it is OK to return the stat buf of one of the remote
virtual directories when getattr() asks for it after the mkdir call?

Will lookup()s still come to my FS with the path that I want the user to
see?

Thanks in advance,
warm regards,
Sundar

On Fri, Mar 28, 2008 at 12:23 PM, Miklos Szeredi <miklos@szeredi.hu> wrote:

> > I am working with FUSE high level on a File system that creates multiple
> > virtual directories for every real directory that the user sees.
> > Unfortunately FUSE high level code does not allow me to complete calls
> like
> > mkdir without actually creating a real directory and throws errors !!
> >
> > Upon tracing the execution paths I find that for mkdir, inside the
> > fuse_lib_mkdir there seems to be some sort of error checking that does a
> > lookup_path.
>
> It's not error checking, but getting the attributes of the new
> directory.
>
> So immediately after ->mkdir() was called, ->getattr() will be called.
>
> > Does this mean I simply cannot have a filesystem implementation that
> creates
> > virtual directories using FUSE high level?
>
> You can create virtual directories with the high level interface too.
> You just have to make sure, that after a directory is created the
> getattr() callback returns the correct attributes for the new entry.
>
> Miklos
>
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