FreeBSD src
52378c7ead
calls MiniportQueryInformation(), it will return NDIS_STATUS_PENDING. When this happens, ndis_get_info() will sleep waiting for a completion event. If two threads call ndis_get_info() and both end up having to sleep, they will both end up waiting on the same wait channel, which can cause a panic in sleepq_add() if INVARIANTS are turned on. Fix this by having ndis_get_info() use a common mutex rather than using the process mutex with PROC_LOCK(). Also do the same for ndis_set_info(). Note that Pierre's original patch also made ndis_thsuspend() use the new mutex, but ndis_thsuspend() shouldn't need this since it will make each thread that calls it sleep on a unique wait channel. Also, it occured to me that we probably don't want to enter MiniportQueryInformation() or MiniportSetInformation() from more than one thread at any given time, so now we acquire a Windows spinlock before calling either of them. The Microsoft documentation says that MiniportQueryInformation() and MiniportSetInformation() are called at DISPATCH_LEVEL, and previously we would call KeRaiseIrql() to set the IRQL to DISPATCH_LEVEL before entering either routine, but this only guarantees mutual exclusion on uniprocessor machines. To make it SMP safe, we need to use a real spinlock. For now, I'm abusing the spinlock embedded in the NDIS_MINIPORT_BLOCK structure for this purpose. (This may need to be applied to some of the other routines in kern_ndis.c at a later date.) Export ntoskrnl_init_lock() (KeInitializeSpinlock()) from subr_ntoskrnl.c since we need to use in in kern_ndis.c, and since it's technically part of the Windows kernel DDK API along with the other spinlock routines. Use it in subr_ndis.c too rather than frobbing the spinlock directly. |
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| bin | ||
| contrib | ||
| crypto | ||
| etc | ||
| games | ||
| gnu | ||
| include | ||
| kerberos5 | ||
| lib | ||
| libexec | ||
| release | ||
| rescue | ||
| sbin | ||
| secure | ||
| share | ||
| sys | ||
| tools | ||
| usr.bin | ||
| usr.sbin | ||
| COPYRIGHT | ||
| MAINTAINERS | ||
| Makefile | ||
| Makefile.inc1 | ||
| 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