On the uniprocessor kernel KiAcquirePrcbLock is a stub that doesn't modify the current Prcb's PrcbLock value.
Quickly protect this assert around CONFIG_SMP
Fixed in x86 and ARM (this was already done in x64).
This is needed because thread preparation routine KxQueueReadyThread()
releases PRCB lock, but does not acquire it, so that the locking must
always be done outside the function, same as in all its other usage cases.
This fixes an assert from release PRCB routine, when booting x86 ReactOS
in SMP mode, because it attempts to release the lock when it is not
actually acquired.
Addendum to commit a011d19ed.
+ Add an assert in KxQueueReadyThread() to ensure the PRCB lock is actually acquired.
CORE-1697
Raise IRQL to SYNCH_LEVEL when exiting from the idle thread in the
idle loop, in case it is scheduled for execution. Then restore it
back to DISPATCH_LEVEL, after this is done.
This behaviour is a bit similar to the way it's done on x64.
This IRQL raise is necessary only in SMP builds.
Calls are placed in CONFIG_SMP ifdef: this avoids unnecessary IRQL
changes on UP, since SYNCH_LEVEL and DISPATCH_LEVEL are identical
there, unlike in MP, where SYNCH_LEVEL is IPI_LEVEL - 2 actually.
This prevents bugcheck DRIVER_IRQL_NOT_LESS_OR_EQUAL when booting
SMP x86 ReactOS, in KiTimerExpiration when calling it 2nd time.
The BSOD happened due to IRQL levels mismatch.
+ Improve related comments.
Registry hives are opened in shared read access when NT is loaded in PE
mode (MININT) or from network (the hives residing on a network share).
This is true in particular for the main system hives (SYSTEM, SOFTWARE,
DEFAULT, ...).
However, in PE mode, we can allow other hives, e.g. those loaded by the
user (with NtLoadKey) to be loaded with full read/write access, since we
boot from a local computer.
In particular remove some extra-parentheses around single code tokens,
and replace few "DPRINT1 + while (TRUE);" by UNIMPLEMENTED_DBGBREAK.
+ Improve some comments.
- Move the GUID_DEVICE_ENUMERATED event from the TargetDeviceChangeEvent category to the DeviceInstallEvent category
- Create a new function that handles DeviceInstallEvent category events
Co-authored-by: Victor Perevertkin <victor.perevertkin@reactos.org>
Introduce the initial changes needed to get other processors up and into kernel mode.
This only supports x86 as of now but is the first real step towards using other system processors.
Sometimes repairing a broken hive with a hive log does not always guarantee the hive
in question has fully recovered. In worst cases it could happen the LOG itself is even
corrupt too and that would certainly lead to a total unbootable system. This is most likely
if the victim hive is the SYSTEM hive.
This can be anyhow solved by the help of a mirror hive, or also called an "alternate hive".
Alternate hives serve the purpose as backup hives for primary hives of which there is still
a risk that is not worth taking. For now only the SYSTEM hive is granted the right to have
a backup alternate hive.
=== NOTE ===
Currently the SYSTEM hive can only base upon the alternate SYSTEM.ALT hive, which means the
corresponding LOG file never gets updated. When time comes the existing code must be adapted
to allow the possibility to use .ALT and .LOG hives simultaneously.
If FreeLdr performed recovery against the SYSTEM hive with a log, all of its data is only present in volatile memory thus dirty. So the kernel is responsible to flush all the data that's been recovered within the SYSTEM hive into the backing storage.
In addition to that, in some functions like CmFlushKey, CmSaveKey and CmSaveMergedKeys we must validate the underlying hives as a matter of precaution that everything is alright and we don't fuck all the shit up.
CmCheckRegistry is a function that provides the necessary validation checks for a registry hive. This function usually comes into action when logs have been replayed for example, or when a registry hive internals have changed such as when saving a key, loading a key, etc.
This commit implements the whole Check Registry infrastructure (cmcheck.c) in CMLIB library for ease of usage and wide accessibility across parts of the OS. In addition, two more functions for registry checks are also implemented -- HvValidateHive and HvValidateBin.
Instead of having the CmCheckRegistry implementation in the kernel, it's better to have it in the Configuration Manager library instead (aka CMLIB). The benefits of having it in the library are the following:
- CmCheckRegistry can be used in FreeLdr to fix the SYSTEM hive
- It can be used on-demand in the kernel
- It can be used for offline registry repair tools
- It makes the underlying CmCheckRegistry implementation code debug-able in user mode
CORE-9195
CORE-6762
During a I/O failure of whatever kind the upper-level driver, namely a FSD, can raise a hard error and a deadlock can occur. We wouldn't want that to happen for particular files like hives or logs so in such cases we must disable hard errors before toying with hives until we're done.
In addition to that, annotate the CmpFileSetSize function's parameters with SAL.
When shutting down the registry of the system we don't want that the registry in question gets poked again, such as flushing the hives or syncing the hives and respective logs for example. The reasoning behind this is very simple, during a complete shutdown the system does final check-ups and stuff until the computer
shuts down.
Any writing operations done to the registry can lead to erratic behaviors. CmShutdownSystem call already invokes a final flushing of all the hives on the backing storage which is more than enough to ensure consistency of the last session configuration. So after that final flushing, mark HvShutdownComplete as TRUE indicating
that any eventual flushing or syncying (in the case where HvSyncHive gets called) request is outright ignored.
