[Qemu-devel] Implementing 9p for Windows host

[Michael Fritscher]

Good day,

I'm using qemu on a Windows host. One thing I stumbled over was missing 
9p support. I thought it was because of missing (x)attr, but Stefan Weil 
told me that 9p is supported only under Linux hosts.

I searched a bit and got following questions:
  * are my following results right: The data structure for 9p is 
9FSState, which has the element FileOperations ops. This is defined in 
fsdev\file-op-9p.h, whis is implemented in 4 ways from hw\p9fs\p9-*.c. 
These are registered by fsdev\qemu-fsdev.c.
  * is the file hw\p9fs\p9-local.c the only cause 9p is working only 
under Linux?
  * 9p-synth makes only a virtual file system without any references to 
a real directory tree - so this should already work under Windows? If 
not: Why not?
  * How to implement the Windows support? I don't want to clutter the 
9p-local.c with #ifdefs all over the place, so my idea is to rename it 
to 9p-local-posix.c, create a new 9p-local-windows.c and let the build 
system include the right one?
  * My first approach will be to skip all of the "fancy" things like 
permissions (using faked ones), symlinks, special files and so on. Is 
this ok?
  * Is already somebody else working on it or should I yust jump in?
  * Is there any documentation I should read regarding 9p aside the 
code itself, the user documentation and 
http://wiki.qemu.org/Documentation/GettingStartedDevelopers ?
  * Is there a person which could mentor me a bit (as I'm completely 
new to qemu source or should I just write to this mailing list or in 
irc's #qemu channel (I'm both in freenode and oftc)?
  * Do I need care of any license agreement stuff? If I'm right all 
files which I need to work with are GPL2, which is fine for me.

Best regards and thanks,
Michael Fritscher

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