854 lines
20 KiB
C++
854 lines
20 KiB
C++
/*++
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Copyright (C) 1991-5 Microsoft Corporation
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Module Name:
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volset.cxx
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Abstract:
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This module contains the code specific to volume sets for the fault
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tolerance driver.
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Author:
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Bob Rinne (bobri) 2-Feb-1992
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Mike Glass (mglass)
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Norbert Kusters 2-Feb-1995
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Environment:
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kernel mode only
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Notes:
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Revision History:
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--*/
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extern "C" {
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#include <ntddk.h>
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}
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#include <ftdisk.h>
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#ifdef ALLOC_PRAGMA
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#pragma code_seg("PAGE")
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#endif
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NTSTATUS
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VOLUME_SET::Initialize(
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IN OUT PROOT_EXTENSION RootExtension,
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IN FT_LOGICAL_DISK_ID LogicalDiskId,
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IN OUT PFT_VOLUME* VolumeArray,
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IN USHORT ArraySize,
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IN PVOID ConfigInfo,
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IN PVOID StateInfo
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)
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/*++
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Routine Description:
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Initialize routine for FT_VOLUME of type VOLUME SET.
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Arguments:
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RootExtension - Supplies the root device extension.
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LogicalDiskId - Supplies the logical disk id for this volume.
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VolumeArray - Supplies the array of volumes for this volume set.
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ArraySize - Supplies the number of volumes in the volume array.
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ConfigInfo - Supplies the configuration information.
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StateInfo - Supplies the state information.
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Return Value:
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NTSTATUS
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--*/
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{
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BOOLEAN oneGood;
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USHORT i;
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NTSTATUS status;
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oneGood = FALSE;
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for (i = 0; i < ArraySize; i++) {
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if (VolumeArray[i]) {
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oneGood = TRUE;
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}
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}
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if (!oneGood) {
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return STATUS_INVALID_PARAMETER;
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}
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status = COMPOSITE_FT_VOLUME::Initialize(RootExtension, LogicalDiskId,
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VolumeArray, ArraySize,
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ConfigInfo, StateInfo);
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if (!NT_SUCCESS(status)) {
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return status;
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}
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_volumeSize = 0;
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for (i = 0; i < ArraySize; i++) {
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if (VolumeArray[i]) {
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_volumeSize += VolumeArray[i]->QueryVolumeSize();
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}
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}
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_ePacket = new VOLSET_TP;
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if (_ePacket && !_ePacket->AllocateMdl((PVOID) 1, STRIPE_SIZE)) {
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delete _ePacket;
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_ePacket = NULL;
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}
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if (!_ePacket) {
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return STATUS_INSUFFICIENT_RESOURCES;
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}
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_ePacketInUse = FALSE;
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InitializeListHead(&_ePacketQueue);
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return status;
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}
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FT_LOGICAL_DISK_TYPE
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VOLUME_SET::QueryLogicalDiskType(
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)
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/*++
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Routine Description:
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This routine returns the type of the logical disk.
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Arguments:
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None.
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Return Value:
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The type of the logical disk.
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--*/
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{
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return FtVolumeSet;
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}
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NTSTATUS
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VOLUME_SET::CheckIo(
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OUT PBOOLEAN IsIoOk
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)
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/*++
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Routine Description:
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This routine returns whether or not IO is possible on the given
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logical disk.
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Arguments:
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IsIoOk - Returns the state of IO.
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Return Value:
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NTSTATUS
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--*/
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{
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USHORT n, i;
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PFT_VOLUME vol;
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NTSTATUS status;
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n = QueryNumMembers();
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for (i = 0; i < n; i++) {
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vol = GetMemberUnprotected(i);
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if (!vol) {
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*IsIoOk = FALSE;
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return STATUS_SUCCESS;
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}
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status = vol->CheckIo(IsIoOk);
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if (!NT_SUCCESS(status)) {
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return status;
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}
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if (!(*IsIoOk)) {
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return STATUS_SUCCESS;
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}
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}
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return STATUS_SUCCESS;
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}
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NTSTATUS
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VOLUME_SET::QueryPhysicalOffsets(
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IN LONGLONG LogicalOffset,
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OUT PVOLUME_PHYSICAL_OFFSET* PhysicalOffsets,
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OUT PULONG NumberOfPhysicalOffsets
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)
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/*++
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Routine Description:
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This routine returns physical disk and offset for a given volume
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logical offset.
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Arguments:
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LogicalOffset - Supplies the logical offset
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PhysicalOffsets - Returns the physical offsets
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NumberOfPhysicalOffsets - Returns the number of physical offsets
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Return Value:
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NTSTATUS
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--*/
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{
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USHORT n, i;
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PFT_VOLUME vol;
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LONGLONG logicalOffsetInMember = LogicalOffset, volumeSize;
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if (LogicalOffset < 0) {
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return STATUS_INVALID_PARAMETER;
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}
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n = QueryNumMembers();
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for (i = 0; i < n; i++) {
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vol = GetMember(i);
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if (!vol) {
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return STATUS_INVALID_PARAMETER;
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}
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volumeSize = vol->QueryVolumeSize();
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if (logicalOffsetInMember < volumeSize) {
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return vol->QueryPhysicalOffsets(logicalOffsetInMember, PhysicalOffsets, NumberOfPhysicalOffsets);
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}
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logicalOffsetInMember -= volumeSize;
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}
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return STATUS_INVALID_PARAMETER;
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}
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NTSTATUS
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VOLUME_SET::QueryLogicalOffset(
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IN PVOLUME_PHYSICAL_OFFSET PhysicalOffset,
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OUT PLONGLONG LogicalOffset
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)
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/*++
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Routine Description:
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This routine returns the volume logical offset for a given disk number
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and physical offset.
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Arguments:
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PhysicalOffset - Supplies the physical offset
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LogicalOffset - Returns the logical offset
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Return Value:
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NTSTATUS
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--*/
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{
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USHORT n, i;
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PFT_VOLUME vol;
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LONGLONG memberStartOffset = 0, logicalOffsetInMember;
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NTSTATUS status;
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n = QueryNumMembers();
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for (i = 0; i < n; i++) {
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vol = GetMember(i);
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if (!vol) {
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return STATUS_INVALID_PARAMETER;
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}
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status = vol->QueryLogicalOffset(PhysicalOffset, &logicalOffsetInMember);
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if (NT_SUCCESS(status)) {
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*LogicalOffset = memberStartOffset + logicalOffsetInMember;
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return status;
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}
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memberStartOffset += vol->QueryVolumeSize();
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}
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return STATUS_INVALID_PARAMETER;
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}
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#ifdef ALLOC_PRAGMA
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#pragma code_seg("PAGELK")
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#endif
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VOLUME_SET::~VOLUME_SET(
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)
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{
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if (_ePacket) {
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delete _ePacket;
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_ePacket = NULL;
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}
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}
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VOID
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VOLUME_SET::Transfer(
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IN OUT PTRANSFER_PACKET TransferPacket
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)
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/*++
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Routine Description:
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Transfer routine for STRIPE type FT_VOLUME. Figure out
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which volumes this request needs to be dispatched to.
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Arguments:
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TransferPacket - Supplies the transfer packet.
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Return Value:
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None.
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--*/
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{
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KIRQL irql;
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if (TransferPacket->Offset + TransferPacket->Length > _volumeSize) {
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TransferPacket->IoStatus.Status = STATUS_INVALID_PARAMETER;
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TransferPacket->IoStatus.Information = 0;
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TransferPacket->CompletionRoutine(TransferPacket);
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return;
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}
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if (!LaunchParallel(TransferPacket)) {
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if (!TransferPacket->Mdl) {
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TransferPacket->IoStatus.Status = STATUS_INSUFFICIENT_RESOURCES;
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TransferPacket->IoStatus.Information = 0;
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TransferPacket->CompletionRoutine(TransferPacket);
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return;
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}
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KeAcquireSpinLock(&_spinLock, &irql);
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if (_ePacketInUse) {
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InsertTailList(&_ePacketQueue, &TransferPacket->QueueEntry);
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KeReleaseSpinLock(&_spinLock, irql);
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return;
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}
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_ePacketInUse = TRUE;
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KeReleaseSpinLock(&_spinLock, irql);
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LaunchSequential(TransferPacket);
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}
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}
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VOID
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VolsetReplaceCompletionRoutine(
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IN OUT PTRANSFER_PACKET TransferPacket
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)
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/*++
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Routine Description:
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This is the completion routine for a replace request.
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Arguments:
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TransferPacket - Supplies the transfer packet.
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Return Value:
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None.
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--*/
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{
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PVOLSET_TP transferPacket = (PVOLSET_TP) TransferPacket;
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PTRANSFER_PACKET masterPacket = transferPacket->MasterPacket;
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masterPacket->IoStatus = transferPacket->IoStatus;
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delete transferPacket;
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masterPacket->CompletionRoutine(masterPacket);
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}
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VOID
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VOLUME_SET::ReplaceBadSector(
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IN OUT PTRANSFER_PACKET TransferPacket
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)
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/*++
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Routine Description:
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This routine attempts to fix the given bad sector by routing
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the request to the appropriate sub-volume.
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Arguments:
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TransferPacket - Supplies the transfer packet.
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Return Value:
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None.
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--*/
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{
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LONGLONG offset = TransferPacket->Offset;
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USHORT n, i;
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PVOLSET_TP p;
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LONGLONG volumeSize;
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n = QueryNumMembers();
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for (i = 0; i < n; i++) {
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volumeSize = GetMemberUnprotected(i)->QueryVolumeSize();
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if (offset < volumeSize) {
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break;
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}
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offset -= volumeSize;
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}
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p = new VOLSET_TP;
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if (!p) {
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TransferPacket->IoStatus.Status = STATUS_INSUFFICIENT_RESOURCES;
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TransferPacket->IoStatus.Information = 0;
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TransferPacket->CompletionRoutine(TransferPacket);
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return;
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}
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p->Length = TransferPacket->Length;
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p->Offset = offset;
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p->CompletionRoutine = VolsetReplaceCompletionRoutine;
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p->TargetVolume = GetMemberUnprotected(i);
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p->Thread = TransferPacket->Thread;
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p->IrpFlags = TransferPacket->IrpFlags;
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p->MasterPacket = TransferPacket;
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p->VolumeSet = this;
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p->WhichMember = i;
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p->TargetVolume->ReplaceBadSector(p);
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}
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LONGLONG
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VOLUME_SET::QueryVolumeSize(
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)
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/*++
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Routine Description:
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Returns the number of bytes on the entire volume.
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Arguments:
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None.
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Return Value:
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The volume size in bytes.
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--*/
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{
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return _volumeSize;
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}
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VOID
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VOLUME_SET::CompleteNotification(
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IN BOOLEAN IoPending
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)
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/*++
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Routine Description:
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This routine is called to notify the volume that it is complete and
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to therefore prepare for incoming requests.
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Arguments:
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IoPending - Supplies whether or not there is IO pending.
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Return Value:
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None.
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--*/
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{
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USHORT n, i;
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PFT_VOLUME vol;
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COMPOSITE_FT_VOLUME::CompleteNotification(IoPending);
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_volumeSize = 0;
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n = QueryNumMembers();
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for (i = 0; i < n; i++) {
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vol = GetMember(i);
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_volumeSize += vol->QueryVolumeSize();
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}
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}
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VOID
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VolsetTransferParallelCompletionRoutine(
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IN PTRANSFER_PACKET TransferPacket
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)
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/*++
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Routine Description:
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Completion routine for VOLUME_SET::Transfer function.
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Arguments:
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TransferPacket - Supplies the transfer packet.
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Return Value:
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None.
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--*/
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{
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PVOLSET_TP transferPacket = (PVOLSET_TP) TransferPacket;
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PTRANSFER_PACKET masterPacket = transferPacket->MasterPacket;
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NTSTATUS status = transferPacket->IoStatus.Status;
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KIRQL irql;
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if (!NT_SUCCESS(status)) {
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KeAcquireSpinLock(&masterPacket->SpinLock, &irql);
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if (FtpIsWorseStatus(status, masterPacket->IoStatus.Status)) {
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masterPacket->IoStatus.Status = status;
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}
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KeReleaseSpinLock(&masterPacket->SpinLock, irql);
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}
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delete transferPacket;
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if (!InterlockedDecrement(&masterPacket->RefCount)) {
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masterPacket->CompletionRoutine(masterPacket);
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}
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}
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BOOLEAN
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VOLUME_SET::LaunchParallel(
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IN OUT PTRANSFER_PACKET TransferPacket
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)
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/*++
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Routine Description:
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This routine lauches the given transfer packet in parallel accross
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all members. If memory cannot be allocated to launch this request
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in parallel then a return value of FALSE will be returned.
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Arguments:
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TransferPacket - Supplies the transfer packet to launch.
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Return Value:
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FALSE - The packet was not launched because of insufficient resources.
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TRUE - Success.
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--*/
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{
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USHORT arraySize, i;
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ULONG length, len;
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LONGLONG offset, volumeSize;
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BOOLEAN multiple;
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PCHAR vp;
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LIST_ENTRY q;
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PVOLSET_TP p;
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PLIST_ENTRY l;
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KeInitializeSpinLock(&TransferPacket->SpinLock);
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TransferPacket->IoStatus.Status = STATUS_SUCCESS;
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TransferPacket->IoStatus.Information = TransferPacket->Length;
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TransferPacket->RefCount = 0;
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arraySize = QueryNumMembers();
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offset = TransferPacket->Offset;
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length = TransferPacket->Length;
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for (i = 0; i < arraySize; i++) {
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volumeSize = GetMemberUnprotected(i)->QueryVolumeSize();
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if (offset < volumeSize) {
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if (offset + length <= volumeSize) {
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multiple = FALSE;
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} else {
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multiple = TRUE;
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}
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break;
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}
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offset -= volumeSize;
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}
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if (TransferPacket->Mdl && multiple) {
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vp = (PCHAR) MmGetMdlVirtualAddress(TransferPacket->Mdl);
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}
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InitializeListHead(&q);
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for (;;) {
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len = length;
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if (len > volumeSize - offset) {
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len = (ULONG) (volumeSize - offset);
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}
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p = new VOLSET_TP;
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if (p) {
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if (TransferPacket->Mdl && multiple) {
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if (p->AllocateMdl(vp, len)) {
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IoBuildPartialMdl(TransferPacket->Mdl, p->Mdl, vp, len);
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} else {
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delete p;
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p = NULL;
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}
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vp += len;
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} else {
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p->Mdl = TransferPacket->Mdl;
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p->OriginalIrp = TransferPacket->OriginalIrp;
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}
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}
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if (!p) {
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while (!IsListEmpty(&q)) {
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l = RemoveHeadList(&q);
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p = CONTAINING_RECORD(l, VOLSET_TP, QueueEntry);
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delete p;
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}
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return FALSE;
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}
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p->Length = len;
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p->Offset = offset;
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p->CompletionRoutine = VolsetTransferParallelCompletionRoutine;
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p->TargetVolume = GetMemberUnprotected(i);
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p->Thread = TransferPacket->Thread;
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p->IrpFlags = TransferPacket->IrpFlags;
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p->ReadPacket = TransferPacket->ReadPacket;
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p->SpecialRead = TransferPacket->SpecialRead;
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p->MasterPacket = TransferPacket;
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p->VolumeSet = this;
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p->WhichMember = i;
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InsertTailList(&q, &p->QueueEntry);
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TransferPacket->RefCount++;
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if (len == length) {
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break;
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}
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offset = 0;
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length -= p->Length;
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volumeSize = GetMemberUnprotected(++i)->QueryVolumeSize();
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}
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while (!IsListEmpty(&q)) {
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l = RemoveHeadList(&q);
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p = CONTAINING_RECORD(l, VOLSET_TP, QueueEntry);
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TRANSFER(p);
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}
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return TRUE;
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}
|
||
|
||
VOID
|
||
VolsetTransferSequentialCompletionRoutine(
|
||
IN PTRANSFER_PACKET TransferPacket
|
||
)
|
||
|
||
/*++
|
||
|
||
Routine Description:
|
||
|
||
Completion routine for VOLUME_SET::Transfer function.
|
||
|
||
Arguments:
|
||
|
||
TransferPacket - Supplies the transfer packet.
|
||
|
||
Return Value:
|
||
|
||
None.
|
||
|
||
--*/
|
||
|
||
{
|
||
PVOLSET_TP transferPacket = (PVOLSET_TP) TransferPacket;
|
||
PTRANSFER_PACKET masterPacket = transferPacket->MasterPacket;
|
||
NTSTATUS status = transferPacket->IoStatus.Status;
|
||
PVOLUME_SET t = transferPacket->VolumeSet;
|
||
LONGLONG masterOffset, volumeSize;
|
||
USHORT i;
|
||
KIRQL irql;
|
||
PLIST_ENTRY l;
|
||
PTRANSFER_PACKET p;
|
||
|
||
if (NT_SUCCESS(status)) {
|
||
|
||
if (NT_SUCCESS(masterPacket->IoStatus.Status)) {
|
||
masterPacket->IoStatus.Information +=
|
||
transferPacket->IoStatus.Information;
|
||
}
|
||
|
||
} else {
|
||
|
||
if (FtpIsWorseStatus(status, masterPacket->IoStatus.Status)) {
|
||
masterPacket->IoStatus.Status = status;
|
||
}
|
||
}
|
||
|
||
MmPrepareMdlForReuse(transferPacket->Mdl);
|
||
|
||
masterOffset = 0;
|
||
for (i = 0; i < transferPacket->WhichMember; i++) {
|
||
masterOffset += t->GetMemberUnprotected(i)->QueryVolumeSize();
|
||
}
|
||
masterOffset += transferPacket->Offset;
|
||
masterOffset += transferPacket->Length;
|
||
|
||
if (masterOffset == masterPacket->Offset + masterPacket->Length) {
|
||
|
||
masterPacket->CompletionRoutine(masterPacket);
|
||
|
||
for (;;) {
|
||
|
||
KeAcquireSpinLock(&t->_spinLock, &irql);
|
||
if (IsListEmpty(&t->_ePacketQueue)) {
|
||
t->_ePacketInUse = FALSE;
|
||
KeReleaseSpinLock(&t->_spinLock, irql);
|
||
break;
|
||
}
|
||
l = RemoveHeadList(&t->_ePacketQueue);
|
||
KeReleaseSpinLock(&t->_spinLock, irql);
|
||
|
||
p = CONTAINING_RECORD(l, TRANSFER_PACKET, QueueEntry);
|
||
|
||
if (!t->LaunchParallel(p)) {
|
||
t->LaunchSequential(p);
|
||
break;
|
||
}
|
||
}
|
||
return;
|
||
}
|
||
|
||
volumeSize = transferPacket->TargetVolume->QueryVolumeSize();
|
||
transferPacket->Offset += transferPacket->Length;
|
||
transferPacket->Length = STRIPE_SIZE;
|
||
|
||
if (transferPacket->Offset >= volumeSize) {
|
||
transferPacket->Offset -= volumeSize;
|
||
transferPacket->WhichMember++;
|
||
transferPacket->TargetVolume =
|
||
t->GetMemberUnprotected(transferPacket->WhichMember);
|
||
volumeSize = transferPacket->TargetVolume->QueryVolumeSize();
|
||
}
|
||
|
||
if (masterOffset + transferPacket->Length >
|
||
masterPacket->Offset + masterPacket->Length) {
|
||
|
||
transferPacket->Length = (ULONG) (masterPacket->Offset +
|
||
masterPacket->Length - masterOffset);
|
||
}
|
||
|
||
if (transferPacket->Offset + transferPacket->Length > volumeSize) {
|
||
transferPacket->Length = (ULONG) (volumeSize - transferPacket->Offset);
|
||
}
|
||
|
||
IoBuildPartialMdl(masterPacket->Mdl, transferPacket->Mdl,
|
||
(PCHAR) MmGetMdlVirtualAddress(masterPacket->Mdl) +
|
||
(ULONG) (masterOffset - masterPacket->Offset),
|
||
transferPacket->Length);
|
||
|
||
TRANSFER(transferPacket);
|
||
}
|
||
|
||
VOID
|
||
VOLUME_SET::LaunchSequential(
|
||
IN OUT PTRANSFER_PACKET TransferPacket
|
||
)
|
||
|
||
/*++
|
||
|
||
Routine Description:
|
||
|
||
This routine lauches the given transfer packet in sequence accross
|
||
all members using the emergency stripe transfer packet.
|
||
|
||
Arguments:
|
||
|
||
TransferPacket - Supplies the transfer packet to launch.
|
||
|
||
Return Value:
|
||
|
||
FALSE - The packet was not launched because of insufficient resources.
|
||
|
||
TRUE - Success.
|
||
|
||
--*/
|
||
|
||
{
|
||
USHORT arraySize, i;
|
||
ULONG length;
|
||
LONGLONG offset, volumeSize;
|
||
PVOLSET_TP p;
|
||
|
||
TransferPacket->IoStatus.Status = STATUS_SUCCESS;
|
||
TransferPacket->IoStatus.Information = 0;
|
||
|
||
arraySize = QueryNumMembers();
|
||
offset = TransferPacket->Offset;
|
||
length = TransferPacket->Length;
|
||
for (i = 0; i < arraySize; i++) {
|
||
volumeSize = GetMemberUnprotected(i)->QueryVolumeSize();
|
||
if (offset < volumeSize) {
|
||
break;
|
||
}
|
||
offset -= volumeSize;
|
||
}
|
||
|
||
p = _ePacket;
|
||
p->Length = STRIPE_SIZE;
|
||
p->Offset = offset;
|
||
p->CompletionRoutine = VolsetTransferSequentialCompletionRoutine;
|
||
p->Thread = TransferPacket->Thread;
|
||
p->IrpFlags = TransferPacket->IrpFlags;
|
||
p->ReadPacket = TransferPacket->ReadPacket;
|
||
p->SpecialRead = TransferPacket->SpecialRead;
|
||
p->MasterPacket = TransferPacket;
|
||
p->VolumeSet = this;
|
||
p->WhichMember = i;
|
||
|
||
if (p->Length > TransferPacket->Length) {
|
||
p->Length = TransferPacket->Length;
|
||
}
|
||
|
||
if (p->Offset + p->Length > volumeSize) {
|
||
p->Length = (ULONG) (volumeSize - p->Offset);
|
||
}
|
||
|
||
IoBuildPartialMdl(TransferPacket->Mdl, p->Mdl,
|
||
MmGetMdlVirtualAddress(TransferPacket->Mdl), p->Length);
|
||
|
||
TRANSFER(p);
|
||
}
|