NFU Specification

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Revision as of 07:47, 1 July 2008 by Dano (talk | contribs)

Simple overview:

NFU server -- "adjacent" to IBP depot.
NFU Op -- lightweight program, written in C, or Java, depending on server.
NFU client -- launches nfuOps and exchanges data with it.
- Two types of data exchange:
- 1. variable exchange
  - IBP_VAL_[IN, OUT, INOUT]
  - variable/values exchanged directly between nfu client and nfu Op
- 2. IBP Cap handling
  - IBP_REF_[RD, WR, RDWR]
  - E.G. _RD: client sends readCap to server, NFU server provides nfuOp a pointer to mmap of the allocation
  - nfuOp does not receive readCap string
security issues
- Java NFU server has VM isolation of nfuOp
- UTK NFU server has option to run Cap as process to isolate nfuOp from server

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