Re: NFS client virtualization plan

[Stanislav Kinsbursky <skinsbursky@parallels.com>]

19.08.2011 20:12, Chuck Lever пишет:
>
> On Aug 19, 2011, at 5:46 AM, Stanislav Kinsbursky wrote:
>
>> 18.08.2011 19:54, Chuck Lever пишет:
>>>
>>> On Aug 16, 2011, at 7:00 AM, Stanislav Kinsbursky wrote:
>>>
>>>> Hello.
>>>> I'm going to virtualize NFS in mainline and here is my plan for NFS client part.
>>>> Any suggestions or criticism are welcome.
>>>
>>> What are you going to do about statd?
>>>
>>
>> Do you mean user-space statd?
>> If so, what are the problems with it do you see?
>
> You go to the trouble of setting up multiple transports for rpcbind upcalls.  This suggests you plan to have an rpcbind in each net namespace.
>
> On behalf of NFS, the kernel also performs idmapd, gssd, and statd (NSM) upcalls.  Do you intend to have separate instances of these daemons for each net namespace?
>

Actually, yes, I do. Thanks for notice.
Kernel NSM monitor routines will be virtualized.
For idmapd and gssd rpc_pipefs virtualization is required.
I wasn't going to virtualize rpc_pipefs for now - it was planned to be a part of NFS server virtualization, which is planned to be done after NFS client virtualization.

>>
>>>> ==============================================================================
>>>>
>>>> "NFS client" virtualization plan:
>>>>
>>>> _RPC layer_:
>>>>
>>>> 1) Make rpcbind clients (rpcb_local_clnt and rpcb_local4_clnt) to be
>>>> per net namespace.
>>>>
>>>> _NFS layer_:
>>>>
>>>> 1) Net namespace inheritance (current->nsproxy->net have to be used instead
>>>> of init_net).
>>>> Pointer to net namespace can be stored on nfs_client structure, which will
>>>> give easy access to proper net namespace during RPC transports creation.
>>>>
>>>> 2) Make Lockd kthread able to handle requests from different net namespaces.
>>>>
>>>> 3) Make NFS callbacks kthreads (nfs4_callback_svc and nfs4.1_callback_svc) able
>>>> to handle requests from different net namespaces.
>>>>
>>>> 4) Make NFS info lists (nfs_volume_list and nfs_client_list) to be per
>>>> net namespace in addition to global ones.
>>>>
>>>> 5) Make NFS proc variables and it's internal content variables to be per
>>>> net namespace in addition to global ones.
>>>>
>>>> 6) Make NFS sysctl variables and it's internal content variables to be per
>>>> net namespace in addition to global ones.
>>>>
>>>>
>>>>
>>>> --
>>>> Best regards,
>>>> Stanislav Kinsbursky
>>>> --
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>>>
>>
>>
>> --
>> Best regards,
>> Stanislav Kinsbursky
>> --
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>


-- 
Best regards,
Stanislav Kinsbursky