NetBSD

History

ozaki-r ef58cf2ca2 Avoid a deadlock between softnet_lock and IFNET_LOCK A deadlock occurs because there is a violation of the rule of lock ordering; softnet_lock is held with hodling IFNET_LOCK, which violates the rule. To avoid the deadlock, replace softnet_lock in in_control and in6_control with KERNEL_LOCK. We also need to add some KERNEL_LOCKs to protect the network stack surely. This is required, for example, for PR kern/51356. Fix PR kern/53043		2018-02-24 07:37:08 +00:00
..
dev	implement 32-bit compat support for raidframe.	2018-01-18 00:32:48 +00:00
fs	Disable a couple of warnings until further investigation.	2017-01-11 12:19:43 +00:00
include	Revert vadvise(2) removal	2018-01-06 16:41:23 +00:00
kern	Fail, don't panic, on bad dirents from file system.	2017-07-28 15:34:06 +00:00
librump	Obtain proper initialized addresses of locks allocated by mutex_obj_alloc or rw_obj_alloc	2018-02-05 05:00:48 +00:00
net	Avoid a deadlock between softnet_lock and IFNET_LOCK	2018-02-24 07:37:08 +00:00
share	Fix typo: s/analoguous/analogous/	2017-06-04 08:53:38 +00:00
Makefile	…
Makefile.rump	implement 32-bit compat support for raidframe.	2018-01-18 00:32:48 +00:00
README.compileopts	Move librumpuser compile-time options into the librumpuser source	2016-01-25 00:24:23 +00:00
README.dirs	…
TODO	Remove solved item.	2015-09-08 12:14:20 +00:00
ldscript.rump	…
ldscript_sun.rump	…
linksyms_sun.c	…
listsrcdirs	…
makerumpsyscalls.sh	"rump_private.h" -> <rump-sys/kern.h>	2016-01-26 23:24:55 +00:00
rump.sysmap	…
sunldgen.sh	…

README.dirs

	$NetBSD: README.dirs,v 1.12 2013/01/08 13:12:26 pooka Exp $


The following is a quick rundown of the current directory structure.
First, components in the kernel namespace, i.e. compiled with -D_KERNEL

sys/rump/librump - rump kernel base and factions
  /rumpkern	- kernel core, e.g. syscall, interrupt and lock support

  /rumpdev	- device support, e.g. autoconf subsystem
  /rumpnet	- networking support and sockets layer
  /rumpvfs	- file system support

sys/rump/include
  /machine - used for architectures where the rump kernel ABI is not yet the
	     same as the kernel module ABI.  will eventually disappear
	     completely
  /rump    - kernel headers installed to userspace

sys/rump/dev - device components, e.g. audio, raidframe, usb drivers

sys/rump/fs - file system components
  /lib/lib${fs}  - kernel file system code

sys/rump/net - networking components
  /lib/libnet	  - subroutines from sys/net, e.g. route and if_ethersubr
  /lib/libnetinet - TCP/IP
  /lib/libvirtif  - a virtual interface which uses host tap(4) to shovel
		    packets.  This is used by netinet and if_ethersubr.
  /lib/libshmif   - a virtual interface which uses a memory mapped file
		    as an ethernet bus.  works completely unprivileged.
  /lib/libsockin  - implements PF_INET using host kernel sockets.  This is
		    mutually exclusive with net, netinet and virtif.



The rest are out-of-kernel components (i.e. no -D_KERNEL).

hypercall interface:
src/lib/librumpuser
  The "rumpuser" hypercall interfaces are used by a rump kernel to
  access host resources.

remote client interface:
src/lib/librumpclient
  The rumpclient library provides remote access to rump kernel servers.

system call hijacking:
src/lib/librumphijack
  The rumphijack library allows intercepting system calls and redirecting
  them to a rump kernel server instead of the host kernel.  In other
  words, it allows existing binaries to request indicated services from
  a rump kernel instead of from the host kernel.

Users:
src/lib
  /libp2k  - puffs-to-vfs adaption layer, userspace namespace
  /libukfs - user kernel file system, a library to access file system
	     images (or devices) directly in userspace without going
	     through a system call and puffs.  It provides a slightly
	     higher interface than syscalls.

src/usr.sbin/puffs
  rump_$fs - userspace file system daemons using the kernel fs code

src/share/examples/rump
  Various examples detailing use of rump kernels in different scenarios.
  These are provided source-only.