NFU Specification: Difference between revisions

From ReddNet

Revision as of 07:49, 1 July 2008

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.
NFU API:
- 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
  - NFU Server (not nfuOp) processes IBP Caps
  - 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

@@ Line 9: / Line 9: @@
 *** variable/values exchanged directly between nfu client and nfu Op
 ** 2. IBP Cap handling
+*** NFU Server (not nfuOp) processes IBP Caps
 ***IBP_REF_[RD, WR, RDWR]
 ***E.G. _RD: client sends readCap to server, NFU server provides nfuOp a pointer to mmap of the allocation