Porting BTRFS to user space

[인정식 <js7.in@samsung.com>]

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Hello BTRFS developers,

I am requesting your opion.

I am planning to design and implement DFS version of BTRFS.
Roughly it will be done by
    1. Extending current DeviceID to NodeID:DeviceID to support multi-node, and
    2. Implementing inter-node data and meta-data access over TCP.
Do you think it would be feasible?

For development, I would like to port the kernel code to user space.
I could continue to run in user mode or be ported back to kernel space.
But I don't know how can I start to porting the kernel code to user space.
Is there anyone who can help?

Thanks,
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