MFC 230587, 230916

MFC 230587, 230916

Xen netback driver rewrite.

  r230587 | ken | 2012-01-26 09:35:09 -0700 (Thu, 26 Jan 2012) | 38 lines

  Xen netback driver rewrite.

  share/man/man4/Makefile,
  share/man/man4/xnb.4,
  sys/dev/xen/netback/netback.c,
  sys/dev/xen/netback/netback_unit_tests.c:

 	Rewrote the netback driver for xen to attach properly via newbus
	and work properly in both HVM and PVM mode (only HVM is tested).
	Works with the in-tree FreeBSD netfront driver or the Windows
	netfront driver from SuSE.  Has not been extensively tested with
	a Linux netfront driver.  Does not implement LRO, TSO, or
	polling.  Includes unit tests that may be run through sysctl
	after compiling with XNB_DEBUG defined.

  sys/dev/xen/blkback/blkback.c,
  sys/xen/interface/io/netif.h:

	Comment elaboration.

  sys/kern/uipc_mbuf.c:

	Fix page fault in kernel mode when calling m_print() on a
	null mbuf.  Since m_print() is only used for debugging, there
	are no performance concerns for extra error checking code.

  sys/kern/subr_scanf.c:

	Add the "hh" and "ll" width specifiers from C99 to scanf().
	A few callers were already using "ll" even though scanf()
	was handling it as "l".

  Submitted by:	Alan Somers <alans@spectralogic.com>
  Submitted by:	John Suykerbuyk <johns@spectralogic.com>
  Sponsored by:	Spectra Logic
  Reviewed by:	ken

  r230916 | ken | 2012-02-02 10:54:35 -0700 (Thu, 02 Feb 2012) | 13 lines

  Fix the netback driver build for i386.

  netback.c:	Add missing VM includes.

  xen/xenvar.h,
  xen/xenpmap.h:	Move some XENHVM macros from <machine/xen/xenpmap.h> to
		<machine/xen/xenvar.h> on i386 to match the amd64 headers.

  conf/files:	Add netback to the build.

  Submitted by:   jhb

git-svn-id: svn://svn.freebsd.org/base/stable/9@231697 ccf9f872-aa2e-dd11-9fc8-001c23d0bc1f