Re: knfsd and append-only attribute: "operation not permitted"

[Aaron D. Ball]

Trond Myklebust wrote:

> fr den 21.01.2005 Klokka 17:44 (+0300) skreiv Vladimir Saveliev:
>  
>
> > fs/nfsd/vfs.c:nfsd_open() refuses to open append only files.
>
>
> Append-only is an unsupported concept in the all existing revisions of
> the NFS protocol. In fact, NFS has no support for append writes at all:
> they have to be emulated by the clients.
>  
OK, but that certainly shouldn't preclude read access.  The way it is 
now, you can't even list append-only directories.  It seems like this 
check should treat append-only files as read-only, only failing to open 
them if write access is requested, rather than failing all the time like 
it does now.

In this particular case, I'm not using append-only files, but rather 
using immutable files and append-only directories to create an archival 
space where things can be added but not changed.  Even if the protocol 
can't deal with append-only regular files, isn't it possible to allow 
mkdir but not rmdir?

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