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e0d84b9ee9
- proc.p_filemon is added which is protected by PROC_LOCK. This improves performance and avoids double-fork issues, taking allproc_lock while in syscalls, and walking the process tree in syscalls. A particular proc.p_filemon can only be changed to NULL or another filemon, or the filemon inherited, while the filemon->lock is held. - Filemon are reference counted. On the last reference the log will be closed. - When closing the devfs file handle, the filemon will be detached from all processes and inheritance prevented. - Disallow attaching to a process already being traced since filemon is typically intended to be used on children only. This is allowed for curproc as bmake relies on this behavior for rare cases when combining .MAKE with .META. - Detach any previously tracked process on ioctl(FILEMON_SET_PID). - Handle error from devfs_set_cdevpriv() in filemon_open(). - The global filemon lock and lists are removed. - A free list is no longer kept. Previously this list was forever-expanding and never garbage cleaned. - No longer loses track of double-forks. If the process holding the filemon handle closes it will close the log rather than wait on a daemonized process, but it will log all activity until it closes its handle. The filemon will be removed from the process and not inherited. - A separate process count is kept only as an optimization for forced detachment to avoid taking allproc_lock and walking the entire process tree. - struct filemon access is protected by sx(9) filemon->lock as it was before. - Add more comments and KASSERTS. MFC after: 2 weeks Reviewed by: kib, mjg, markj (all on previous versions) Sponsored by: EMC / Isilon Storage Division Differential Revision: https://reviews.freebsd.org/D5520 |
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| bin | ||
| cddl | ||
| contrib | ||
| crypto | ||
| etc | ||
| gnu | ||
| include | ||
| kerberos5 | ||
| lib | ||
| libexec | ||
| release | ||
| rescue | ||
| sbin | ||
| secure | ||
| share | ||
| sys | ||
| targets | ||
| tests | ||
| tools | ||
| usr.bin | ||
| usr.sbin | ||
| .arcconfig | ||
| .arclint | ||
| COPYRIGHT | ||
| LOCKS | ||
| MAINTAINERS | ||
| Makefile | ||
| Makefile.inc1 | ||
| Makefile.libcompat | ||
| ObsoleteFiles.inc | ||
| 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. 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. 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. 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