Annotation of wikisrc/projects/project/putter_pud_puffs.mdwn, revision 1.2

1.1       jmmv        1: [[!template id=project
                      2: 
                      3: title="Userspace file system and device driver code sharing"
                      4: 
                      5: contact="""
                      6: [tech-userlevel](mailto:tech-userlevel@NetBSD.org)
                      7: """
                      8: 
                      9: mentors="""
                     10: [Antti Kantee](mailto:pooka@NetBSD.org)
                     11: """
                     12: 
1.2     ! jmmv       13: category="userland"
        !            14: difficulty="easy"
1.1       jmmv       15: duration="3 months"
                     16: 
                     17: description="""
                     18: As is well-known, [puffs(3)](http://netbsd.gw.com/cgi-bin/man-cgi?puffs+3+NetBSD-5.1+i386) is the NetBSD userspace file system framework. It provides support for implementing file servers in userspace. A lesser known "cousin" of puffs is the Pass-to-Userspace Device, or [pud(4)](http://netbsd.gw.com/cgi-bin/man-cgi?pud+4+NetBSD-5.1+i386) framework, which provides support for implementing character and block device servers in userspace. Both use [putter(9)](http://netbsd.gw.com/cgi-bin/man-cgi?putter+9+NetBSD-5.1+i386) for transmitting requests to and from the kernel.
                     19: 
                     20: Currently, puffs includes a userspace support library: libpuffs. It provides two facets:
                     21: 
                     22: * file system routines and callback interface
                     23: * generic parts, including kernel request handling
                     24: 
                     25: On the other hand, pud is without a userspace support library and servers talk with kernel directly with `read()` and `write()`.
                     26: 
                     27: The goal of the project is to modify libpuffs into a generic library which pud and puffs can share, and provide libpuffs and libpud built on this base. The submission should include a rough analysis of the source modules of libpuffs and what is going to happen to them during the project.
                     28: 
                     29: This project is fairly straightforward, but involves a reasonable amount of work. Plenty of [documentation](http://www.netbsd.org/docs/puffs/#moreinfo) exists to make the learning curve manageable. This project is an excellent opportunity to practise getting your hands dirty with real world systems.
                     30: """
                     31: ]]
                     32: 
                     33: [[!tag gsoc]]

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