FreeBSD src
f82c6950be
adds a witness to the child list of a parent witness. rebalancetree() runs through the entire tree removing direct descendants of witnesses who already have said child witness as an indirect descendant through another direct descendant. itismychild() now calls insertchild() followed by rebalancetree() and no longer needs the evil hack of having static recursed variable. - Add a function reparentchildren() that adds all the direct descendants of one witness as direct descendants of another witness. - Change the return value of itismychild() and similar functions so that they return 0 in the case of failure due to lack of resources instead of 1. This makes the return value more intuitive. - Check the return value of itismychild() when defining the static lock order in witness_initialize(). - Don't try to setup a lock instance in witness_lock() if itismychild() fails. Witness is hosed anyways so no need to do any more witness related activity at that point. It also makes the code flow easier to understand. - Add a new depart() function as the opposite of enroll(). When the reference count of a witness drops to 0 in witness_destroy(), this function is called on that witness. First, it runs through the lock order tree using reparentchildren() to reparent direct descendants of the departing witness to each of the witness' parents in the tree. Next, it releases it's own child list and other associated resources. Finally it calls rebalanacetree() to rebalance the lock order tree. - Sort function prototypes into something closer to alphabetical order. As a result of these changes, there should no longer be 'dead' witnesses in the order tree, and repeatedly loading and unloading a module should no longer exhaust witness of its internal resources. Inspired by: gallatin |
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| bin | ||
| contrib | ||
| crypto | ||
| etc | ||
| games | ||
| gnu | ||
| include | ||
| kerberos5 | ||
| lib | ||
| libexec | ||
| release | ||
| sbin | ||
| secure | ||
| share | ||
| sys | ||
| tools | ||
| usr.bin | ||
| usr.sbin | ||
| COPYRIGHT | ||
| MAINTAINERS | ||
| Makefile | ||
| Makefile.inc1 | ||
| Makefile.upgrade | ||
| README | ||
| UPDATING | ||
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 ``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. 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. 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