98e82c02e5
cause a crash. Because dummynet calls pie_cleanup() while holding a mutex, pie_cleanup() is not able to use callout_drain() to make sure that all callouts are finished before it returns, and callout_stop() is not sufficient to make that guarantee. After pie_cleanup() returns, dummynet will free a structure that any remaining callouts will want to access. Fix these problems by allocating a separate structure to contain the data used by the callouts. In pie_cleanup(), call callout_reset_sbt() to replace the normal callout with a cleanup callout that does the cleanup work for each sub-queue. The instance of the cleanup callout that destroys the last flow will also free the extra allocated block of memory. Protect the reference count manipulation in the cleanup callout with DN_BH_WLOCK() to be consistent with all of the other usage of the reference count where this lock is held by the dummynet code. Submitted by: Rasool Al-Saadi <ralsaadi@swin.edu.au> MFC after: 3 days Differential Revision: https://reviews.freebsd.org/D7174
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. See build(7) and 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. See build(7), config(8), and http://www.freebsd.org/doc/en_US.ISO8859-1/books/handbook/kernelconfig.html for more information. 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 kernel configuration files reside in the sys/<arch>/conf sub-directory. GENERIC is the default configuration used in release builds. NOTES contains entries and documentation for all possible devices, not just those commonly used. 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. 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. tests Regression tests which can be run by Kyua. See tests/README for additional information. 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