451 lines
10 KiB
C
451 lines
10 KiB
C
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/*++
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Copyright (c) 2000 Microsoft Corporation
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Module Name:
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vfsettings.c
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Abstract:
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This module contains code that tracks whether various verifier tests are
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enabled. It also keeps track of various values.
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Author:
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Adrian J. Oney (adriao) 31-May-2000
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Environment:
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Kernel mode
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Revision History:
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--*/
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#include "vfdef.h"
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#include "visettings.h"
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#ifdef ALLOC_PRAGMA
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#pragma alloc_text(PAGEVRFY, VfSettingsInit)
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#pragma alloc_text(PAGEVRFY, VfSettingsCreateSnapshot)
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#pragma alloc_text(PAGEVRFY, VfSettingsGetSnapshotSize)
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#pragma alloc_text(PAGEVRFY, VfSettingsIsOptionEnabled)
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#pragma alloc_text(PAGEVRFY, VfSettingsSetOption)
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#pragma alloc_text(PAGEVRFY, VfSettingsGetValue)
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#pragma alloc_text(PAGEVRFY, VfSettingsSetValue)
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#endif
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#define POOL_TAG_VERIFIER_SETTINGS 'oGfV'
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//
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// This points to the global list of verifier settings.
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//
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PVERIFIER_SETTINGS_SNAPSHOT VfSettingsGlobal = NULL;
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VOID
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FASTCALL
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VfSettingsInit(
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IN ULONG MmFlags
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)
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/*++
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Description:
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This routine is called to initialize the current set of verifier settings.
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Arguments:
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MmFlags - A mask of flags (DRIVER_VERIFIER_xxx) indicating which verifier
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settings should be enabled.
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Return Value:
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None.
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--*/
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{
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//
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// As this is system startup code, it is one of the very few places where
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// it's ok to use MustSucceed.
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//
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VfSettingsGlobal = (PVERIFIER_SETTINGS_SNAPSHOT) ExAllocatePoolWithTag(
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NonPagedPoolMustSucceed,
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VfSettingsGetSnapshotSize(),
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POOL_TAG_VERIFIER_SETTINGS
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);
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RtlZeroMemory(VfSettingsGlobal, VfSettingsGetSnapshotSize());
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//
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// Set IRP deferral time to 300 us.
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//
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VfSettingsSetValue(NULL, VERIFIER_VALUE_IRP_DEFERRAL_TIME, 10 * 300);
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if (MmFlags & DRIVER_VERIFIER_IO_CHECKING) {
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VfSettingsSetOption(NULL, VERIFIER_OPTION_EXAMINE_RELATION_PDOS, TRUE);
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VfSettingsSetOption(NULL, VERIFIER_OPTION_TRACK_IRPS, TRUE);
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VfSettingsSetOption(NULL, VERIFIER_OPTION_MONITOR_IRP_ALLOCS, TRUE);
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VfSettingsSetOption(NULL, VERIFIER_OPTION_POLICE_IRPS, TRUE);
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VfSettingsSetOption(NULL, VERIFIER_OPTION_MONITOR_MAJORS, TRUE);
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if (MmFlags & DRIVER_VERIFIER_ENHANCED_IO_CHECKING) {
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#if 0
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//
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// These are untested options:
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//
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VfSettingsSetOption(NULL, VERIFIER_OPTION_BUFFER_DIRECT_IO, TRUE);
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VfSettingsSetOption(NULL, VERIFIER_OPTION_DEFER_COMPLETION, TRUE);
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VfSettingsSetOption(NULL, VERIFIER_OPTION_COMPLETE_AT_PASSIVE, TRUE);
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VfSettingsSetOption(NULL, VERIFIER_OPTION_FORCE_PENDING, TRUE);
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VfSettingsSetOption(NULL, VERIFIER_OPTION_COMPLETE_AT_DISPATCH, TRUE);
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VfSettingsSetOption(NULL, VERIFIER_OPTION_DETECT_DEADLOCKS, TRUE);
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VfSettingsSetOption(NULL, VERIFIER_OPTION_VERIFY_DO_FLAGS, TRUE);
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VfSettingsSetOption(NULL, VERIFIER_OPTION_SMASH_SRBS, TRUE);
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VfSettingsSetOption(NULL, VERIFIER_OPTION_SURROGATE_IRPS, TRUE);
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#endif
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VfSettingsSetOption(NULL, VERIFIER_OPTION_INSERT_WDM_FILTERS, TRUE);
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VfSettingsSetOption(NULL, VERIFIER_OPTION_MONITOR_PENDING_IO, TRUE);
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VfSettingsSetOption(NULL, VERIFIER_OPTION_SEEDSTACK, TRUE);
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VfSettingsSetOption(NULL, VERIFIER_OPTION_ROTATE_STATUS, TRUE);
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VfSettingsSetOption(NULL, VERIFIER_OPTION_SCRAMBLE_RELATIONS, TRUE);
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VfSettingsSetOption(NULL, VERIFIER_OPTION_CONSUME_ALWAYS, TRUE);
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VfSettingsSetOption(NULL, VERIFIER_OPTION_MONITOR_REMOVES, TRUE);
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VfSettingsSetOption(NULL, VERIFIER_OPTION_SEND_BOGUS_WMI_IRPS, TRUE);
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VfSettingsSetOption(NULL, VERIFIER_OPTION_SEND_BOGUS_POWER_IRPS, TRUE);
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VfSettingsSetOption(NULL, VERIFIER_OPTION_RELATION_IGNORANCE_TEST, TRUE);
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}
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}
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if (MmFlags & DRIVER_VERIFIER_DMA_VERIFIER) {
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VfSettingsSetOption(NULL, VERIFIER_OPTION_VERIFY_DMA, TRUE);
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VfSettingsSetOption(NULL, VERIFIER_OPTION_DOUBLE_BUFFER_DMA, TRUE);
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}
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if (MmFlags & DRIVER_VERIFIER_HARDWARE_VERIFICATION) {
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VfSettingsSetOption(NULL, VERIFIER_OPTION_HARDWARE_VERIFICATION, TRUE);
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}
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if (MmFlags & DRIVER_VERIFIER_SYSTEM_BIOS_VERIFICATION) {
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VfSettingsSetOption(NULL, VERIFIER_OPTION_SYSTEM_BIOS_VERIFICATION, TRUE);
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}
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}
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VOID
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FASTCALL
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VfSettingsCreateSnapshot(
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IN OUT PVERIFIER_SETTINGS_SNAPSHOT VerifierSettingsSnapshot
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)
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/*++
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Description:
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This routine creates a snapshot of the current global verifier settings.
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Arguments:
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VerifierSettingsSnapshot - Pointer to an uninitialized block of memory,
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the size of which is determined by calling
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VfSettingsGetSnapshotSize.
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Return Value:
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Size of snapshot data in bytes.
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--*/
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{
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RtlCopyMemory(
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VerifierSettingsSnapshot,
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VfSettingsGlobal,
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VfSettingsGetSnapshotSize()
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);
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}
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ULONG
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FASTCALL
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VfSettingsGetSnapshotSize(
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VOID
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)
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/*++
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Description:
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This routine returns the size of a snapshot. It allows callers to create
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an appropriate sized buffer for storing verifier settings.
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Arguments:
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None.
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Return Value:
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Size of snapshot data in bytes.
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--*/
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{
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return (OPTION_SIZE + sizeof(ULONG) * VERIFIER_VALUE_MAX);
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}
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BOOLEAN
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FASTCALL
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VfSettingsIsOptionEnabled(
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IN PVERIFIER_SETTINGS_SNAPSHOT VerifierSettingsSnapshot OPTIONAL,
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IN VERIFIER_OPTION VerifierOption
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)
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/*++
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Description:
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This routine determines whether a given verifier option is enabled.
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Arguments:
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VerifierSettingsSnapshot - A snapshot of verifier settings. If NULL the
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current system-wide verifier setting are used.
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VerifierOption - Option to examine
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Return Value:
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TRUE if option is currently enabled, FALSE otherwise.
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--*/
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{
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ULONG verifierIndex, verifierMask;
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PULONG verifierData;
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//
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// Bounds check.
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//
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if ((VerifierOption >= VERIFIER_OPTION_MAX) || (VerifierOption == 0)) {
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ASSERT(0);
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return FALSE;
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}
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//
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// Extract appropriate bit.
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//
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verifierIndex = (ULONG) VerifierOption;
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verifierMask = 1 << (verifierIndex % 32);
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verifierIndex /= 32;
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if (VerifierSettingsSnapshot) {
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verifierData = (PULONG) VerifierSettingsSnapshot;
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} else {
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verifierData = (PULONG) VfSettingsGlobal;
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}
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//
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// And now the test.
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//
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return (BOOLEAN)((verifierData[verifierIndex]&verifierMask) != 0);
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}
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VOID
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FASTCALL
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VfSettingsSetOption(
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IN PVERIFIER_SETTINGS_SNAPSHOT VerifierSettingsSnapshot OPTIONAL,
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IN VERIFIER_OPTION VerifierOption,
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IN BOOLEAN Setting
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)
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/*++
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Description:
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This routine sets the state of a given verifier option.
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Arguments:
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VerifierSettingsSnapshot - A snapshot of verifier settings. If NULL the
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current system-wide verifier setting are used.
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VerifierOption - Option to set
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Setting - TRUE if option should be enabled, FALSE otherwise.
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Return Value:
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None.
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--*/
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{
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ULONG verifierIndex, verifierMask, oldValue, newValue, lastValue;
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PULONG verifierData;
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//
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// Bounds check.
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//
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if ((VerifierOption >= VERIFIER_OPTION_MAX) || (VerifierOption == 0)) {
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ASSERT(0);
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return;
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}
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//
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// Extract appropriate bit.
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//
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verifierIndex = (ULONG) VerifierOption;
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verifierMask = 1 << (verifierIndex % 32);
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verifierIndex /= 32;
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if (VerifierSettingsSnapshot) {
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verifierData = (PULONG) VerifierSettingsSnapshot;
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} else {
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verifierData = (PULONG) VfSettingsGlobal;
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}
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//
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// And now to set the value as atomically as possible.
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//
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do {
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oldValue = verifierData[verifierIndex];
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if (Setting) {
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newValue = oldValue | verifierMask;
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} else {
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newValue = oldValue &= ~verifierMask;
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}
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lastValue = InterlockedExchange((PLONG)(verifierData + verifierIndex), newValue);
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} while ( lastValue != newValue );
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}
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VOID
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FASTCALL
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VfSettingsGetValue(
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IN PVERIFIER_SETTINGS_SNAPSHOT VerifierSettingsSnapshot OPTIONAL,
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IN VERIFIER_VALUE VerifierValue,
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OUT ULONG *Value
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)
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/*++
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Description:
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This routine retrieves a given verifier value.
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Arguments:
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VerifierSettingsSnapshot - A snapshot of verifier settings. If NULL the
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current system-wide verifier setting are used.
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VerifierValue - Value to retrieve.
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Value - Receives verifier value (0 if bad VerifierValue was specified.)
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Return Value:
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None.
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--*/
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{
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PULONG valueArray;
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//
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// Sanity check values
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//
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if ((VerifierValue == 0) || (VerifierValue >= VERIFIER_VALUE_MAX)) {
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*Value = 0;
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return;
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}
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//
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// Get appropriate array
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//
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if (VerifierSettingsSnapshot) {
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valueArray = (PULONG) (((PUCHAR) VerifierSettingsSnapshot) + OPTION_SIZE);
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} else {
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valueArray = (PULONG) (((PUCHAR) VfSettingsGlobal) + OPTION_SIZE);
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}
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//
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// Read out the value.
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//
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*Value = valueArray[VerifierValue];
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}
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VOID
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FASTCALL
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VfSettingsSetValue(
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IN PVERIFIER_SETTINGS_SNAPSHOT VerifierSettingsSnapshot OPTIONAL,
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IN VERIFIER_VALUE VerifierValue,
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IN ULONG Value
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)
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/*++
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Description:
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This routine sets the state of a given verifier value.
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Arguments:
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VerifierSettingsSnapshot - A snapshot of verifier settings. If NULL the
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current system-wide verifier setting are used.
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VerifierValue - Value to set.
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Value - ULONG to store.
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Return Value:
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None.
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--*/
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{
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PULONG valueArray;
|
||
|
|
|
||
|
|
//
|
||
|
|
// Sanity check values
|
||
|
|
//
|
||
|
|
if ((VerifierValue == 0) || (VerifierValue >= VERIFIER_VALUE_MAX)) {
|
||
|
|
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
|
||
|
|
//
|
||
|
|
// Get appropriate array
|
||
|
|
//
|
||
|
|
if (VerifierSettingsSnapshot) {
|
||
|
|
|
||
|
|
valueArray = (PULONG) (((PUCHAR) VerifierSettingsSnapshot) + OPTION_SIZE);
|
||
|
|
|
||
|
|
} else {
|
||
|
|
|
||
|
|
valueArray = (PULONG) (((PUCHAR) VfSettingsGlobal) + OPTION_SIZE);
|
||
|
|
}
|
||
|
|
|
||
|
|
//
|
||
|
|
// Set the value.
|
||
|
|
//
|
||
|
|
valueArray[VerifierValue] = Value;
|
||
|
|
}
|
||
|
|
|