Re: [PATCH 00/11] [RFC] repair net namespace damage to rpc_pipefs

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On Dec 2, 2013, at 11:27, Christoph Hellwig <hch@xxxxxxxxxxxxx> wrote:

> On Mon, Dec 02, 2013 at 11:00:50AM -0500, Trond Myklebust wrote:
>>> Except for the non-rpc_client users of rpc_pipefs?
>> 
>> There is the idmapper pipe which is created as part of setting up a NFSv4 mount: that could either call rpc_get_mount(), or just rely on the fact that the nfs_client has an rpc_client. Ditto for the DNS resolver pipe.
> 
> We got idmapper, dns, pnfs-block upcall.
> 
> idmapper seems per-nfs_client, the other two are created on module load
> and removed at unload time.

Do they need to be? AFAICS, we can trivially convert the DNS resolver to be created on mount. The pnfs block upcall looks to be a little more difficult, but we should be able to do it in ld_type->set_layoutdriver()/clear_layoutdriver().

> Similarly the pipe in nfsd works globally as well.

Mount the rpc_pipefs in nfs4_state_create_net() and unmount it in nfs4_state_destroy_net()?

Cheers
  Trond--
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