Message-ID: <4284CFE5.60004@ocre.cea.fr>
Date: Fri, 13 May 2005 18:03:49 +0200
From: Aurelien Degremont - Stagiaire <degremont@ocre.cea.fr>
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To: Dean Roehrich <roehrich@sgi.com>
CC: linux-xfs@oss.sgi.com
Subject: Re: [DMAPI] code error in dm_ip_to_handle()
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Dean Roehrich a écrit:
> Certainly, dm_handle_to_ip() is intended to return any type of handle,
> including filesystem handles.  In the case of XFS, when a filesystem handle is
> requested we contruct it from the filesystem's root vnode.
> 
> I suppose dm_handle_to_ip() could be called with the handle from the mount
> event.  That handle would have a fid_len of 0, due to the memset() in
> dm_sb_data()...the HSM would call to things like dm_get_config() and
> dm_set_disp() with that handle.

Yes, in fh_to_inode(), we could recognize the fshandle, using the 
fid_len value.

But, in inode_to_fh(), how know that we must return a fshandle (with the 
dm_fid part filled with 0) or a filehandle (ino, len and gen filled) ?

What's the difference between
dm_path_to_fshandle("/")
and
dm_path_to_handle("/") ?

(Assuming / is a DMAPI compatible filesystem)


Aurelien