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Konstantin Belousov f82360acf2 Existing VOP_VPTOCNP() interface has a fatal flow that is critical for
nullfs.  The problem is that resulting vnode is only required to be
held on return from the successfull call to vop, instead of being
referenced.

Nullfs VOP_INACTIVE() method reclaims the vnode, which in combination
with the VOP_VPTOCNP() interface means that the directory vnode
returned from VOP_VPTOCNP() is reclaimed in advance, causing
vn_fullpath() to error with EBADF or like.

Change the interface for VOP_VPTOCNP(), now the dvp must be
referenced. Convert all in-tree implementations of VOP_VPTOCNP(),
which is trivial, because vhold(9) and vref(9) are similar in the
locking prerequisites. Out-of-tree fs implementation of VOP_VPTOCNP(),
if any, should have no trouble with the fix.

Tested by:	pho
Reviewed by:	mckusick
MFC after:	3 weeks (subject of re approval)
2011-11-19 07:50:49 +00:00
bin Vendor import of BIND 9.8.1-P1 2011-11-17 00:16:15 +00:00
cddl More zfs(8) manpage fixes: 2011-11-18 02:25:54 +00:00
contrib Upgrade to BIND 9.8.1-P1 to address the following DDOS bug: 2011-11-17 00:25:35 +00:00
crypto Add a -x option that causes ssh-agent(1) to exit when all clients have 2011-10-07 13:10:16 +00:00
etc On some laptops it is important to re-open /dev/psm after resume. moused(8) 2011-11-15 12:59:07 +00:00
games Add static keywords to variables and functions where possible in games/. 2011-11-05 07:18:53 +00:00
gnu When one attempts to compile the tree with -march=i386, which also used 2011-11-06 14:07:23 +00:00
include Hide some more macros that will break C++ when compiling in C++ mode. 2011-11-13 17:07:26 +00:00
kerberos5 - Add missing interdependencies to kerberos libraries. Some of the 2011-09-27 07:14:12 +00:00
lib Free unused allocation on error. 2011-11-18 09:56:40 +00:00
libexec Fix fd leak. 2011-11-18 09:55:47 +00:00
release Add sfxge(4) to the hardware notes. 2011-11-18 16:54:22 +00:00
rescue Add netcat (nc) to /rescue. 2011-11-15 16:20:39 +00:00
sbin Finish making 'wcommitsize' an NFS client mount option. 2011-11-14 18:52:07 +00:00
secure - add a missing "be" and "in" 2011-11-11 22:27:09 +00:00
share Import virtio base, PCI front-end, and net/block/balloon drivers. 2011-11-18 05:43:43 +00:00
sys Existing VOP_VPTOCNP() interface has a fatal flow that is critical for 2011-11-19 07:50:49 +00:00
tools Revert r227538, since it doesn't compile with clang at all (it doesn't 2011-11-17 21:06:53 +00:00
usr.bin Add helpful clarification text. While not strictly necessary, these 2011-11-16 22:02:59 +00:00
usr.sbin KNF 2011-11-15 06:50:10 +00:00
COPYRIGHT
LOCKS
MAINTAINERS Farewall, sysinstall! You served us well for many years, but 10.0 is one 2011-10-03 15:13:09 +00:00
Makefile It's a bit odd, but "make update" in src/ can also update the ports/, 2011-06-16 12:28:37 +00:00
Makefile.inc1 Revert r227403 for now. Since the cross-tools stage purposefully 2011-11-10 20:15:35 +00:00
Makefile.mips Retire TARGET_ABI. 2011-01-07 20:26:33 +00:00
ObsoleteFiles.inc Add more obsolete files. 2011-11-06 14:00:18 +00:00
README
UPDATING Introduce the option VFS_ALLOW_NONMPSAFE and turn it on by default on 2011-11-08 10:18:07 +00:00

This is the top level of the FreeBSD source directory.  This file
was last revised on:
$FreeBSD$

For copyright information, please see the file COPYRIGHT in this
directory (additional copyright information also exists for some
sources in this tree - please see the specific source directories for
more information).

The Makefile in this directory supports a number of targets for
building components (or all) of the FreeBSD source tree, the most
commonly used one being ``world'', which rebuilds and installs
everything in the FreeBSD system from the source tree except the
kernel, the kernel-modules and the contents of /etc.  The ``world''
target should only be used in cases where the source tree has not
changed from the currently running version.  See:
http://www.freebsd.org/doc/en_US.ISO8859-1/books/handbook/makeworld.html
for more information, including setting make(1) variables.

The ``buildkernel'' and ``installkernel'' targets build and install
the kernel and the modules (see below).  Please see the top of
the Makefile in this directory for more information on the
standard build targets and compile-time flags.

Building a kernel is a somewhat more involved process, documentation
for which can be found at:
   http://www.freebsd.org/doc/en_US.ISO8859-1/books/handbook/kernelconfig.html
And in the config(8) man page.
Note: If you want to build and install the kernel with the
``buildkernel'' and ``installkernel'' targets, you might need to build
world before.  More information is available in the handbook.

The sample kernel configuration files reside in the sys/<arch>/conf
sub-directory (assuming that you've installed the kernel sources), the
file named GENERIC being the one used to build your initial installation
kernel.  The file NOTES contains entries and documentation for all possible
devices, not just those commonly used.  It is the successor of the ancient
LINT file, but in contrast to LINT, it is not buildable as a kernel but a
pure reference and documentation file.


Source Roadmap:
---------------
bin		System/user commands.

cddl		Various commands and libraries under the Common Development
		and Distribution License.

contrib		Packages contributed by 3rd parties.

crypto		Cryptography stuff (see crypto/README).

etc		Template files for /etc.

games		Amusements.

gnu		Various commands and libraries under the GNU Public License.
		Please see gnu/COPYING* for more information.

include		System include files.

kerberos5	Kerberos5 (Heimdal) package.

lib		System libraries.

libexec		System daemons.

release		Release building Makefile & associated tools.

rescue		Build system for statically linked /rescue utilities.

sbin		System commands.

secure		Cryptographic libraries and commands.

share		Shared resources.

sys		Kernel sources.

tools		Utilities for regression testing and miscellaneous tasks.

usr.bin		User commands.

usr.sbin	System administration commands.


For information on synchronizing your source tree with one or more of
the FreeBSD Project's development branches, please see:

  http://www.freebsd.org/doc/en_US.ISO8859-1/books/handbook/synching.html