mirror of
https://github.com/reactos/reactos.git
synced 2024-12-29 10:35:28 +00:00
1098 lines
36 KiB
C
1098 lines
36 KiB
C
/*
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* PROJECT: VFAT Filesystem
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* LICENSE: GPL-2.0-or-later (https://spdx.org/licenses/GPL-2.0-or-later)
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* PURPOSE: File creation routines
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* COPYRIGHT: Copyright 1998 Jason Filby <jasonfilby@yahoo.com>
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* Copyright 2010-2019 Pierre Schweitzer <pierre@reactos.org>
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*/
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/* INCLUDES *****************************************************************/
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#include "vfat.h"
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#define NDEBUG
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#include <debug.h>
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/* FUNCTIONS *****************************************************************/
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VOID
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vfat8Dot3ToString(
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PFAT_DIR_ENTRY pEntry,
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PUNICODE_STRING NameU)
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{
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OEM_STRING StringA;
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USHORT Length;
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CHAR cString[12];
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RtlCopyMemory(cString, pEntry->ShortName, 11);
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cString[11] = 0;
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if (cString[0] == 0x05)
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{
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cString[0] = 0xe5;
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}
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StringA.Buffer = cString;
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for (StringA.Length = 0;
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StringA.Length < 8 && StringA.Buffer[StringA.Length] != ' ';
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StringA.Length++);
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StringA.MaximumLength = StringA.Length;
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RtlOemStringToUnicodeString(NameU, &StringA, FALSE);
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if (BooleanFlagOn(pEntry->lCase, VFAT_CASE_LOWER_BASE))
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{
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RtlDowncaseUnicodeString(NameU, NameU, FALSE);
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}
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if (cString[8] != ' ')
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{
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Length = NameU->Length;
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NameU->Buffer += Length / sizeof(WCHAR);
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if (!FAT_ENTRY_VOLUME(pEntry))
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{
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Length += sizeof(WCHAR);
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NameU->Buffer[0] = L'.';
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NameU->Buffer++;
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}
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NameU->Length = 0;
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NameU->MaximumLength -= Length;
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StringA.Buffer = &cString[8];
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for (StringA.Length = 0;
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StringA.Length < 3 && StringA.Buffer[StringA.Length] != ' ';
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StringA.Length++);
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StringA.MaximumLength = StringA.Length;
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RtlOemStringToUnicodeString(NameU, &StringA, FALSE);
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if (BooleanFlagOn(pEntry->lCase, VFAT_CASE_LOWER_EXT))
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{
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RtlDowncaseUnicodeString(NameU, NameU, FALSE);
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}
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NameU->Buffer -= Length / sizeof(WCHAR);
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NameU->Length += Length;
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NameU->MaximumLength += Length;
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}
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NameU->Buffer[NameU->Length / sizeof(WCHAR)] = 0;
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DPRINT("'%wZ'\n", NameU);
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}
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/*
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* FUNCTION: Find a file
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*/
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NTSTATUS
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FindFile(
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PDEVICE_EXTENSION DeviceExt,
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PVFATFCB Parent,
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PUNICODE_STRING FileToFindU,
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PVFAT_DIRENTRY_CONTEXT DirContext,
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BOOLEAN First)
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{
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PWCHAR PathNameBuffer;
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USHORT PathNameBufferLength;
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NTSTATUS Status;
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PVOID Context = NULL;
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PVOID Page;
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PVFATFCB rcFcb;
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BOOLEAN Found;
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UNICODE_STRING PathNameU;
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UNICODE_STRING FileToFindUpcase;
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BOOLEAN WildCard;
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BOOLEAN IsFatX = vfatVolumeIsFatX(DeviceExt);
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DPRINT("FindFile(Parent %p, FileToFind '%wZ', DirIndex: %u)\n",
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Parent, FileToFindU, DirContext->DirIndex);
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DPRINT("FindFile: Path %wZ\n",&Parent->PathNameU);
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PathNameBufferLength = LONGNAME_MAX_LENGTH * sizeof(WCHAR);
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PathNameBuffer = ExAllocatePoolWithTag(NonPagedPool, PathNameBufferLength + sizeof(WCHAR), TAG_NAME);
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if (!PathNameBuffer)
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{
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return STATUS_INSUFFICIENT_RESOURCES;
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}
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PathNameU.Buffer = PathNameBuffer;
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PathNameU.Length = 0;
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PathNameU.MaximumLength = PathNameBufferLength;
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DirContext->LongNameU.Length = 0;
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DirContext->ShortNameU.Length = 0;
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WildCard = FsRtlDoesNameContainWildCards(FileToFindU);
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if (WildCard == FALSE)
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{
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/* if there is no '*?' in the search name, than look first for an existing fcb */
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RtlCopyUnicodeString(&PathNameU, &Parent->PathNameU);
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if (!vfatFCBIsRoot(Parent))
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{
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PathNameU.Buffer[PathNameU.Length / sizeof(WCHAR)] = L'\\';
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PathNameU.Length += sizeof(WCHAR);
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}
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RtlAppendUnicodeStringToString(&PathNameU, FileToFindU);
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PathNameU.Buffer[PathNameU.Length / sizeof(WCHAR)] = 0;
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rcFcb = vfatGrabFCBFromTable(DeviceExt, &PathNameU);
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if (rcFcb)
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{
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ULONG startIndex = rcFcb->startIndex;
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if (IsFatX && !vfatFCBIsRoot(Parent))
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{
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startIndex += 2;
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}
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if(startIndex >= DirContext->DirIndex)
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{
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RtlCopyUnicodeString(&DirContext->LongNameU, &rcFcb->LongNameU);
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RtlCopyUnicodeString(&DirContext->ShortNameU, &rcFcb->ShortNameU);
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RtlCopyMemory(&DirContext->DirEntry, &rcFcb->entry, sizeof(DIR_ENTRY));
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DirContext->StartIndex = rcFcb->startIndex;
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DirContext->DirIndex = rcFcb->dirIndex;
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DPRINT("FindFile: new Name %wZ, DirIndex %u (%u)\n",
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&DirContext->LongNameU, DirContext->DirIndex, DirContext->StartIndex);
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Status = STATUS_SUCCESS;
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}
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else
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{
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DPRINT("FCB not found for %wZ\n", &PathNameU);
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Status = STATUS_UNSUCCESSFUL;
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}
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vfatReleaseFCB(DeviceExt, rcFcb);
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ExFreePoolWithTag(PathNameBuffer, TAG_NAME);
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return Status;
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}
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}
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/* FsRtlIsNameInExpression need the searched string to be upcase,
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* even if IgnoreCase is specified */
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Status = RtlUpcaseUnicodeString(&FileToFindUpcase, FileToFindU, TRUE);
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if (!NT_SUCCESS(Status))
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{
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ExFreePoolWithTag(PathNameBuffer, TAG_NAME);
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return Status;
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}
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while (TRUE)
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{
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Status = VfatGetNextDirEntry(DeviceExt, &Context, &Page, Parent, DirContext, First);
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First = FALSE;
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if (Status == STATUS_NO_MORE_ENTRIES)
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{
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break;
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}
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if (ENTRY_VOLUME(IsFatX, &DirContext->DirEntry))
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{
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DirContext->DirIndex++;
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continue;
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}
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if (DirContext->LongNameU.Length == 0 ||
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DirContext->ShortNameU.Length == 0)
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{
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DPRINT1("WARNING: File system corruption detected. You may need to run a disk repair utility.\n");
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if (VfatGlobalData->Flags & VFAT_BREAK_ON_CORRUPTION)
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{
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ASSERT(DirContext->LongNameU.Length != 0 &&
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DirContext->ShortNameU.Length != 0);
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}
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DirContext->DirIndex++;
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continue;
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}
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if (WildCard)
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{
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Found = FsRtlIsNameInExpression(&FileToFindUpcase, &DirContext->LongNameU, TRUE, NULL) ||
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FsRtlIsNameInExpression(&FileToFindUpcase, &DirContext->ShortNameU, TRUE, NULL);
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}
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else
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{
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Found = FsRtlAreNamesEqual(&DirContext->LongNameU, FileToFindU, TRUE, NULL) ||
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FsRtlAreNamesEqual(&DirContext->ShortNameU, FileToFindU, TRUE, NULL);
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}
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if (Found)
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{
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if (WildCard)
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{
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RtlCopyUnicodeString(&PathNameU, &Parent->PathNameU);
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if (!vfatFCBIsRoot(Parent))
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{
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PathNameU.Buffer[PathNameU.Length / sizeof(WCHAR)] = L'\\';
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PathNameU.Length += sizeof(WCHAR);
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}
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RtlAppendUnicodeStringToString(&PathNameU, &DirContext->LongNameU);
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PathNameU.Buffer[PathNameU.Length / sizeof(WCHAR)] = 0;
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rcFcb = vfatGrabFCBFromTable(DeviceExt, &PathNameU);
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if (rcFcb != NULL)
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{
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RtlCopyMemory(&DirContext->DirEntry, &rcFcb->entry, sizeof(DIR_ENTRY));
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vfatReleaseFCB(DeviceExt, rcFcb);
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}
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}
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DPRINT("%u\n", DirContext->LongNameU.Length);
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DPRINT("FindFile: new Name %wZ, DirIndex %u\n",
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&DirContext->LongNameU, DirContext->DirIndex);
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if (Context)
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{
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CcUnpinData(Context);
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}
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RtlFreeUnicodeString(&FileToFindUpcase);
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ExFreePoolWithTag(PathNameBuffer, TAG_NAME);
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return STATUS_SUCCESS;
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}
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DirContext->DirIndex++;
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}
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if (Context)
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{
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CcUnpinData(Context);
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}
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RtlFreeUnicodeString(&FileToFindUpcase);
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ExFreePoolWithTag(PathNameBuffer, TAG_NAME);
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return Status;
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}
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/*
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* FUNCTION: Opens a file
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*/
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static
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NTSTATUS
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VfatOpenFile(
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PDEVICE_EXTENSION DeviceExt,
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PUNICODE_STRING PathNameU,
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PFILE_OBJECT FileObject,
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ULONG RequestedDisposition,
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ULONG RequestedOptions,
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PVFATFCB *ParentFcb)
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{
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PVFATFCB Fcb;
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NTSTATUS Status;
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DPRINT("VfatOpenFile(%p, '%wZ', %p, %p)\n", DeviceExt, PathNameU, FileObject, ParentFcb);
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if (FileObject->RelatedFileObject)
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{
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DPRINT("'%wZ'\n", &FileObject->RelatedFileObject->FileName);
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*ParentFcb = FileObject->RelatedFileObject->FsContext;
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}
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else
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{
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*ParentFcb = NULL;
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}
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if (!DeviceExt->FatInfo.FixedMedia)
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{
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Status = VfatBlockDeviceIoControl(DeviceExt->StorageDevice,
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IOCTL_DISK_CHECK_VERIFY,
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NULL,
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0,
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NULL,
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0,
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FALSE);
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if (!NT_SUCCESS(Status))
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{
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DPRINT("Status %lx\n", Status);
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*ParentFcb = NULL;
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return Status;
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}
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}
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if (*ParentFcb)
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{
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vfatGrabFCB(DeviceExt, *ParentFcb);
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}
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/* try first to find an existing FCB in memory */
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DPRINT("Checking for existing FCB in memory\n");
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Status = vfatGetFCBForFile(DeviceExt, ParentFcb, &Fcb, PathNameU);
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if (!NT_SUCCESS(Status))
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{
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DPRINT ("Could not make a new FCB, status: %x\n", Status);
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return Status;
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}
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/* Fail, if we try to overwrite an existing directory */
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if ((!BooleanFlagOn(RequestedOptions, FILE_DIRECTORY_FILE) && vfatFCBIsDirectory(Fcb)) &&
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(RequestedDisposition == FILE_OVERWRITE ||
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RequestedDisposition == FILE_OVERWRITE_IF ||
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RequestedDisposition == FILE_SUPERSEDE))
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{
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vfatReleaseFCB(DeviceExt, Fcb);
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return STATUS_OBJECT_NAME_COLLISION;
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}
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if (BooleanFlagOn(Fcb->Flags, FCB_DELETE_PENDING))
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{
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vfatReleaseFCB(DeviceExt, Fcb);
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return STATUS_DELETE_PENDING;
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}
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/* Fail, if we try to overwrite a read-only file */
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if (vfatFCBIsReadOnly(Fcb) &&
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(RequestedDisposition == FILE_OVERWRITE ||
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RequestedDisposition == FILE_OVERWRITE_IF))
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{
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vfatReleaseFCB(DeviceExt, Fcb);
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return STATUS_ACCESS_DENIED;
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}
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if (vfatFCBIsReadOnly(Fcb) &&
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(RequestedOptions & FILE_DELETE_ON_CLOSE))
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{
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vfatReleaseFCB(DeviceExt, Fcb);
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return STATUS_CANNOT_DELETE;
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}
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if ((vfatFCBIsRoot(Fcb) || IsDotOrDotDot(&Fcb->LongNameU)) &&
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BooleanFlagOn(RequestedOptions, FILE_DELETE_ON_CLOSE))
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{
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// we cannot delete a '.', '..' or the root directory
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vfatReleaseFCB(DeviceExt, Fcb);
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return STATUS_CANNOT_DELETE;
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}
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/* If that one was marked for closing, remove it */
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if (BooleanFlagOn(Fcb->Flags, FCB_DELAYED_CLOSE))
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{
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BOOLEAN ConcurrentDeletion;
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PVFAT_CLOSE_CONTEXT CloseContext;
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/* Get the context */
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CloseContext = Fcb->CloseContext;
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/* Is someone already taking over? */
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if (CloseContext != NULL)
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{
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ConcurrentDeletion = FALSE;
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/* Lock list */
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ExAcquireFastMutex(&VfatGlobalData->CloseMutex);
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/* Check whether it was already removed, if not, do it */
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if (!IsListEmpty(&CloseContext->CloseListEntry))
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{
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RemoveEntryList(&CloseContext->CloseListEntry);
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--VfatGlobalData->CloseCount;
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ConcurrentDeletion = TRUE;
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}
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ExReleaseFastMutex(&VfatGlobalData->CloseMutex);
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/* It's not delayed anymore! */
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ClearFlag(Fcb->Flags, FCB_DELAYED_CLOSE);
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/* Release the extra reference (would have been removed by IRP_MJ_CLOSE) */
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vfatReleaseFCB(DeviceExt, Fcb);
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Fcb->CloseContext = NULL;
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/* If no concurrent deletion, free work item */
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if (!ConcurrentDeletion)
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{
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ExFreeToPagedLookasideList(&VfatGlobalData->CloseContextLookasideList, CloseContext);
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}
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}
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DPRINT("Reusing delayed close FCB for %wZ\n", &Fcb->PathNameU);
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}
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DPRINT("Attaching FCB to fileObject\n");
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Status = vfatAttachFCBToFileObject(DeviceExt, Fcb, FileObject);
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if (!NT_SUCCESS(Status))
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{
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vfatReleaseFCB(DeviceExt, Fcb);
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}
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return Status;
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}
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/*
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* FUNCTION: Create or open a file
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*/
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static NTSTATUS
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VfatCreateFile(
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PDEVICE_OBJECT DeviceObject,
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PIRP Irp)
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{
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PIO_STACK_LOCATION Stack;
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PFILE_OBJECT FileObject;
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NTSTATUS Status = STATUS_SUCCESS;
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PDEVICE_EXTENSION DeviceExt;
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ULONG RequestedDisposition, RequestedOptions;
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PVFATFCB pFcb = NULL;
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PVFATFCB ParentFcb = NULL;
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PVFATCCB pCcb = NULL;
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PWCHAR c, last;
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BOOLEAN PagingFileCreate;
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BOOLEAN Dots;
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BOOLEAN OpenTargetDir;
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BOOLEAN TrailingBackslash;
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UNICODE_STRING FileNameU;
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UNICODE_STRING PathNameU;
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ULONG Attributes;
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/* Unpack the various parameters. */
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Stack = IoGetCurrentIrpStackLocation(Irp);
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RequestedDisposition = ((Stack->Parameters.Create.Options >> 24) & 0xff);
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RequestedOptions = Stack->Parameters.Create.Options & FILE_VALID_OPTION_FLAGS;
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PagingFileCreate = BooleanFlagOn(Stack->Flags, SL_OPEN_PAGING_FILE);
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OpenTargetDir = BooleanFlagOn(Stack->Flags, SL_OPEN_TARGET_DIRECTORY);
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FileObject = Stack->FileObject;
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DeviceExt = DeviceObject->DeviceExtension;
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if (BooleanFlagOn(Stack->Parameters.Create.Options, FILE_OPEN_BY_FILE_ID))
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{
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return STATUS_NOT_IMPLEMENTED;
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}
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/* Check their validity. */
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if (BooleanFlagOn(RequestedOptions, FILE_DIRECTORY_FILE) &&
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RequestedDisposition == FILE_SUPERSEDE)
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{
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return STATUS_INVALID_PARAMETER;
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}
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if (BooleanFlagOn(RequestedOptions, FILE_DIRECTORY_FILE) &&
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BooleanFlagOn(RequestedOptions, FILE_NON_DIRECTORY_FILE))
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{
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return STATUS_INVALID_PARAMETER;
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}
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/* Deny create if the volume is locked */
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if (BooleanFlagOn(DeviceExt->Flags, VCB_VOLUME_LOCKED))
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{
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return STATUS_ACCESS_DENIED;
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}
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/* This a open operation for the volume itself */
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if (FileObject->FileName.Length == 0 &&
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(FileObject->RelatedFileObject == NULL ||
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FileObject->RelatedFileObject->FsContext2 != NULL ||
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FileObject->RelatedFileObject->FsContext == DeviceExt->VolumeFcb))
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{
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DPRINT("Volume opening\n");
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if (RequestedDisposition != FILE_OPEN &&
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RequestedDisposition != FILE_OPEN_IF)
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{
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return STATUS_ACCESS_DENIED;
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}
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if (BooleanFlagOn(RequestedOptions, FILE_DIRECTORY_FILE) &&
|
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(FileObject->RelatedFileObject == NULL || FileObject->RelatedFileObject->FsContext2 == NULL || FileObject->RelatedFileObject->FsContext == DeviceExt->VolumeFcb))
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{
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return STATUS_NOT_A_DIRECTORY;
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}
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if (OpenTargetDir)
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{
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return STATUS_INVALID_PARAMETER;
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}
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if (BooleanFlagOn(RequestedOptions, FILE_DELETE_ON_CLOSE))
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{
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return STATUS_CANNOT_DELETE;
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}
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vfatAddToStat(DeviceExt, Fat.CreateHits, 1);
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pFcb = DeviceExt->VolumeFcb;
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if (pFcb->OpenHandleCount == 0)
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{
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IoSetShareAccess(Stack->Parameters.Create.SecurityContext->DesiredAccess,
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Stack->Parameters.Create.ShareAccess,
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FileObject,
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&pFcb->FCBShareAccess);
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}
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else
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{
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Status = IoCheckShareAccess(Stack->Parameters.Create.SecurityContext->DesiredAccess,
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Stack->Parameters.Create.ShareAccess,
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FileObject,
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&pFcb->FCBShareAccess,
|
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TRUE);
|
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if (!NT_SUCCESS(Status))
|
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{
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vfatAddToStat(DeviceExt, Fat.FailedCreates, 1);
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return Status;
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}
|
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}
|
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|
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vfatAttachFCBToFileObject(DeviceExt, pFcb, FileObject);
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DeviceExt->OpenHandleCount++;
|
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pFcb->OpenHandleCount++;
|
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vfatAddToStat(DeviceExt, Fat.SuccessfulCreates, 1);
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|
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Irp->IoStatus.Information = FILE_OPENED;
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return STATUS_SUCCESS;
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}
|
|
|
|
if (FileObject->RelatedFileObject != NULL &&
|
|
FileObject->RelatedFileObject->FsContext == DeviceExt->VolumeFcb)
|
|
{
|
|
ASSERT(FileObject->FileName.Length != 0);
|
|
return STATUS_OBJECT_PATH_NOT_FOUND;
|
|
}
|
|
|
|
/* Check for illegal characters and illegal dot sequences in the file name */
|
|
PathNameU = FileObject->FileName;
|
|
c = PathNameU.Buffer + PathNameU.Length / sizeof(WCHAR);
|
|
last = c - 1;
|
|
|
|
Dots = TRUE;
|
|
while (c-- > PathNameU.Buffer)
|
|
{
|
|
if (*c == L'\\' || c == PathNameU.Buffer)
|
|
{
|
|
if (Dots && last > c)
|
|
{
|
|
return STATUS_OBJECT_NAME_INVALID;
|
|
}
|
|
if (*c == L'\\' && (c - 1) > PathNameU.Buffer &&
|
|
*(c - 1) == L'\\')
|
|
{
|
|
return STATUS_OBJECT_NAME_INVALID;
|
|
}
|
|
|
|
last = c - 1;
|
|
Dots = TRUE;
|
|
}
|
|
else if (*c != L'.')
|
|
{
|
|
Dots = FALSE;
|
|
}
|
|
|
|
if (*c != '\\' && vfatIsLongIllegal(*c))
|
|
{
|
|
return STATUS_OBJECT_NAME_INVALID;
|
|
}
|
|
}
|
|
|
|
/* Check if we try to open target directory of root dir */
|
|
if (OpenTargetDir && FileObject->RelatedFileObject == NULL && PathNameU.Length == sizeof(WCHAR) &&
|
|
PathNameU.Buffer[0] == L'\\')
|
|
{
|
|
return STATUS_INVALID_PARAMETER;
|
|
}
|
|
|
|
if (FileObject->RelatedFileObject && PathNameU.Length >= sizeof(WCHAR) && PathNameU.Buffer[0] == L'\\')
|
|
{
|
|
return STATUS_OBJECT_NAME_INVALID;
|
|
}
|
|
|
|
TrailingBackslash = FALSE;
|
|
if (PathNameU.Length > sizeof(WCHAR) && PathNameU.Buffer[PathNameU.Length/sizeof(WCHAR)-1] == L'\\')
|
|
{
|
|
PathNameU.Length -= sizeof(WCHAR);
|
|
TrailingBackslash = TRUE;
|
|
}
|
|
|
|
if (PathNameU.Length > sizeof(WCHAR) && PathNameU.Buffer[PathNameU.Length/sizeof(WCHAR)-1] == L'\\')
|
|
{
|
|
return STATUS_OBJECT_NAME_INVALID;
|
|
}
|
|
|
|
/* Try opening the file. */
|
|
if (!OpenTargetDir)
|
|
{
|
|
vfatAddToStat(DeviceExt, Fat.CreateHits, 1);
|
|
|
|
Status = VfatOpenFile(DeviceExt, &PathNameU, FileObject, RequestedDisposition, RequestedOptions, &ParentFcb);
|
|
}
|
|
else
|
|
{
|
|
PVFATFCB TargetFcb;
|
|
LONG idx, FileNameLen;
|
|
|
|
vfatAddToStat(DeviceExt, Fat.CreateHits, 1);
|
|
|
|
ParentFcb = (FileObject->RelatedFileObject != NULL) ? FileObject->RelatedFileObject->FsContext : NULL;
|
|
if (ParentFcb)
|
|
{
|
|
vfatGrabFCB(DeviceExt, ParentFcb);
|
|
}
|
|
|
|
Status = vfatGetFCBForFile(DeviceExt, &ParentFcb, &TargetFcb, &PathNameU);
|
|
if (NT_SUCCESS(Status))
|
|
{
|
|
vfatReleaseFCB(DeviceExt, TargetFcb);
|
|
Irp->IoStatus.Information = FILE_EXISTS;
|
|
}
|
|
else
|
|
{
|
|
Irp->IoStatus.Information = FILE_DOES_NOT_EXIST;
|
|
}
|
|
|
|
idx = FileObject->FileName.Length / sizeof(WCHAR) - 1;
|
|
|
|
/* Skip trailing \ - if any */
|
|
if (PathNameU.Buffer[idx] == L'\\')
|
|
{
|
|
--idx;
|
|
PathNameU.Length -= sizeof(WCHAR);
|
|
}
|
|
|
|
/* Get file name */
|
|
while (idx >= 0 && PathNameU.Buffer[idx] != L'\\')
|
|
{
|
|
--idx;
|
|
}
|
|
|
|
if (idx > 0 || PathNameU.Buffer[0] == L'\\')
|
|
{
|
|
/* We don't want to include / in the name */
|
|
FileNameLen = PathNameU.Length - ((idx + 1) * sizeof(WCHAR));
|
|
|
|
/* Update FO just to keep file name */
|
|
/* Skip first slash */
|
|
++idx;
|
|
FileObject->FileName.Length = FileNameLen;
|
|
RtlMoveMemory(&PathNameU.Buffer[0], &PathNameU.Buffer[idx], FileObject->FileName.Length);
|
|
#if 0
|
|
/* Terminate the string at the last backslash */
|
|
PathNameU.Buffer[idx + 1] = UNICODE_NULL;
|
|
PathNameU.Length = (idx + 1) * sizeof(WCHAR);
|
|
PathNameU.MaximumLength = PathNameU.Length + sizeof(WCHAR);
|
|
|
|
/* Update the file object as well */
|
|
FileObject->FileName.Length = PathNameU.Length;
|
|
FileObject->FileName.MaximumLength = PathNameU.MaximumLength;
|
|
#endif
|
|
}
|
|
else
|
|
{
|
|
/* This is a relative open and we have only the filename, so open the parent directory
|
|
* It is in RelatedFileObject
|
|
*/
|
|
ASSERT(FileObject->RelatedFileObject != NULL);
|
|
|
|
/* No need to modify the FO, it already has the name */
|
|
}
|
|
|
|
/* We're done with opening! */
|
|
if (ParentFcb != NULL)
|
|
{
|
|
Status = vfatAttachFCBToFileObject(DeviceExt, ParentFcb, FileObject);
|
|
}
|
|
|
|
if (NT_SUCCESS(Status))
|
|
{
|
|
pFcb = FileObject->FsContext;
|
|
ASSERT(pFcb == ParentFcb);
|
|
|
|
if (pFcb->OpenHandleCount == 0)
|
|
{
|
|
IoSetShareAccess(Stack->Parameters.Create.SecurityContext->DesiredAccess,
|
|
Stack->Parameters.Create.ShareAccess,
|
|
FileObject,
|
|
&pFcb->FCBShareAccess);
|
|
}
|
|
else
|
|
{
|
|
Status = IoCheckShareAccess(Stack->Parameters.Create.SecurityContext->DesiredAccess,
|
|
Stack->Parameters.Create.ShareAccess,
|
|
FileObject,
|
|
&pFcb->FCBShareAccess,
|
|
FALSE);
|
|
if (!NT_SUCCESS(Status))
|
|
{
|
|
VfatCloseFile(DeviceExt, FileObject);
|
|
vfatAddToStat(DeviceExt, Fat.FailedCreates, 1);
|
|
return Status;
|
|
}
|
|
}
|
|
|
|
pCcb = FileObject->FsContext2;
|
|
if (BooleanFlagOn(RequestedOptions, FILE_DELETE_ON_CLOSE))
|
|
{
|
|
pCcb->Flags |= CCB_DELETE_ON_CLOSE;
|
|
}
|
|
|
|
pFcb->OpenHandleCount++;
|
|
DeviceExt->OpenHandleCount++;
|
|
}
|
|
else if (ParentFcb != NULL)
|
|
{
|
|
vfatReleaseFCB(DeviceExt, ParentFcb);
|
|
}
|
|
|
|
if (NT_SUCCESS(Status))
|
|
{
|
|
vfatAddToStat(DeviceExt, Fat.SuccessfulCreates, 1);
|
|
}
|
|
else
|
|
{
|
|
vfatAddToStat(DeviceExt, Fat.FailedCreates, 1);
|
|
}
|
|
|
|
return Status;
|
|
}
|
|
|
|
/*
|
|
* If the directory containing the file to open doesn't exist then
|
|
* fail immediately
|
|
*/
|
|
if (Status == STATUS_OBJECT_PATH_NOT_FOUND ||
|
|
Status == STATUS_INVALID_PARAMETER ||
|
|
Status == STATUS_DELETE_PENDING ||
|
|
Status == STATUS_ACCESS_DENIED ||
|
|
Status == STATUS_OBJECT_NAME_COLLISION)
|
|
{
|
|
if (ParentFcb)
|
|
{
|
|
vfatReleaseFCB(DeviceExt, ParentFcb);
|
|
}
|
|
vfatAddToStat(DeviceExt, Fat.FailedCreates, 1);
|
|
return Status;
|
|
}
|
|
|
|
if (!NT_SUCCESS(Status) && ParentFcb == NULL)
|
|
{
|
|
DPRINT1("VfatOpenFile failed for '%wZ', status %x\n", &PathNameU, Status);
|
|
vfatAddToStat(DeviceExt, Fat.FailedCreates, 1);
|
|
return Status;
|
|
}
|
|
|
|
Attributes = (Stack->Parameters.Create.FileAttributes & (FILE_ATTRIBUTE_ARCHIVE |
|
|
FILE_ATTRIBUTE_SYSTEM |
|
|
FILE_ATTRIBUTE_HIDDEN |
|
|
FILE_ATTRIBUTE_DIRECTORY |
|
|
FILE_ATTRIBUTE_READONLY));
|
|
|
|
/* If the file open failed then create the required file */
|
|
if (!NT_SUCCESS (Status))
|
|
{
|
|
if (RequestedDisposition == FILE_CREATE ||
|
|
RequestedDisposition == FILE_OPEN_IF ||
|
|
RequestedDisposition == FILE_OVERWRITE_IF ||
|
|
RequestedDisposition == FILE_SUPERSEDE)
|
|
{
|
|
if (!BooleanFlagOn(RequestedOptions, FILE_DIRECTORY_FILE))
|
|
{
|
|
if (TrailingBackslash)
|
|
{
|
|
vfatReleaseFCB(DeviceExt, ParentFcb);
|
|
vfatAddToStat(DeviceExt, Fat.FailedCreates, 1);
|
|
return STATUS_OBJECT_NAME_INVALID;
|
|
}
|
|
Attributes |= FILE_ATTRIBUTE_ARCHIVE;
|
|
}
|
|
vfatSplitPathName(&PathNameU, NULL, &FileNameU);
|
|
|
|
if (IsDotOrDotDot(&FileNameU))
|
|
{
|
|
vfatReleaseFCB(DeviceExt, ParentFcb);
|
|
vfatAddToStat(DeviceExt, Fat.FailedCreates, 1);
|
|
return STATUS_OBJECT_NAME_INVALID;
|
|
}
|
|
Status = VfatAddEntry(DeviceExt, &FileNameU, &pFcb, ParentFcb, RequestedOptions,
|
|
Attributes, NULL);
|
|
vfatReleaseFCB(DeviceExt, ParentFcb);
|
|
if (NT_SUCCESS(Status))
|
|
{
|
|
Status = vfatAttachFCBToFileObject(DeviceExt, pFcb, FileObject);
|
|
if (!NT_SUCCESS(Status))
|
|
{
|
|
vfatReleaseFCB(DeviceExt, pFcb);
|
|
vfatAddToStat(DeviceExt, Fat.FailedCreates, 1);
|
|
return Status;
|
|
}
|
|
|
|
Irp->IoStatus.Information = FILE_CREATED;
|
|
VfatSetAllocationSizeInformation(FileObject,
|
|
pFcb,
|
|
DeviceExt,
|
|
&Irp->Overlay.AllocationSize);
|
|
VfatSetExtendedAttributes(FileObject,
|
|
Irp->AssociatedIrp.SystemBuffer,
|
|
Stack->Parameters.Create.EaLength);
|
|
|
|
if (PagingFileCreate)
|
|
{
|
|
pFcb->Flags |= FCB_IS_PAGE_FILE;
|
|
SetFlag(DeviceExt->Flags, VCB_IS_SYS_OR_HAS_PAGE);
|
|
}
|
|
}
|
|
else
|
|
{
|
|
vfatAddToStat(DeviceExt, Fat.FailedCreates, 1);
|
|
return Status;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
vfatReleaseFCB(DeviceExt, ParentFcb);
|
|
vfatAddToStat(DeviceExt, Fat.FailedCreates, 1);
|
|
return Status;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
if (ParentFcb)
|
|
{
|
|
vfatReleaseFCB(DeviceExt, ParentFcb);
|
|
}
|
|
|
|
pFcb = FileObject->FsContext;
|
|
|
|
/* Otherwise fail if the caller wanted to create a new file */
|
|
if (RequestedDisposition == FILE_CREATE)
|
|
{
|
|
VfatCloseFile(DeviceExt, FileObject);
|
|
if (TrailingBackslash && !vfatFCBIsDirectory(pFcb))
|
|
{
|
|
vfatAddToStat(DeviceExt, Fat.FailedCreates, 1);
|
|
return STATUS_OBJECT_NAME_INVALID;
|
|
}
|
|
Irp->IoStatus.Information = FILE_EXISTS;
|
|
vfatAddToStat(DeviceExt, Fat.FailedCreates, 1);
|
|
return STATUS_OBJECT_NAME_COLLISION;
|
|
}
|
|
|
|
if (pFcb->OpenHandleCount != 0)
|
|
{
|
|
Status = IoCheckShareAccess(Stack->Parameters.Create.SecurityContext->DesiredAccess,
|
|
Stack->Parameters.Create.ShareAccess,
|
|
FileObject,
|
|
&pFcb->FCBShareAccess,
|
|
FALSE);
|
|
if (!NT_SUCCESS(Status))
|
|
{
|
|
VfatCloseFile(DeviceExt, FileObject);
|
|
vfatAddToStat(DeviceExt, Fat.FailedCreates, 1);
|
|
return Status;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Check the file has the requested attributes
|
|
*/
|
|
if (BooleanFlagOn(RequestedOptions, FILE_NON_DIRECTORY_FILE) &&
|
|
vfatFCBIsDirectory(pFcb))
|
|
{
|
|
VfatCloseFile (DeviceExt, FileObject);
|
|
vfatAddToStat(DeviceExt, Fat.FailedCreates, 1);
|
|
return STATUS_FILE_IS_A_DIRECTORY;
|
|
}
|
|
if (BooleanFlagOn(RequestedOptions, FILE_DIRECTORY_FILE) &&
|
|
!vfatFCBIsDirectory(pFcb))
|
|
{
|
|
VfatCloseFile (DeviceExt, FileObject);
|
|
vfatAddToStat(DeviceExt, Fat.FailedCreates, 1);
|
|
return STATUS_NOT_A_DIRECTORY;
|
|
}
|
|
if (TrailingBackslash && !vfatFCBIsDirectory(pFcb))
|
|
{
|
|
VfatCloseFile (DeviceExt, FileObject);
|
|
vfatAddToStat(DeviceExt, Fat.FailedCreates, 1);
|
|
return STATUS_OBJECT_NAME_INVALID;
|
|
}
|
|
#ifndef USE_ROS_CC_AND_FS
|
|
if (!vfatFCBIsDirectory(pFcb))
|
|
{
|
|
if (BooleanFlagOn(Stack->Parameters.Create.SecurityContext->DesiredAccess, FILE_WRITE_DATA) ||
|
|
RequestedDisposition == FILE_OVERWRITE ||
|
|
RequestedDisposition == FILE_OVERWRITE_IF ||
|
|
(RequestedOptions & FILE_DELETE_ON_CLOSE))
|
|
{
|
|
if (!MmFlushImageSection(&pFcb->SectionObjectPointers, MmFlushForWrite))
|
|
{
|
|
DPRINT1("%wZ\n", &pFcb->PathNameU);
|
|
DPRINT1("%d %d %d\n", Stack->Parameters.Create.SecurityContext->DesiredAccess & FILE_WRITE_DATA,
|
|
RequestedDisposition == FILE_OVERWRITE, RequestedDisposition == FILE_OVERWRITE_IF);
|
|
VfatCloseFile (DeviceExt, FileObject);
|
|
vfatAddToStat(DeviceExt, Fat.FailedCreates, 1);
|
|
return (BooleanFlagOn(RequestedOptions, FILE_DELETE_ON_CLOSE)) ? STATUS_CANNOT_DELETE
|
|
: STATUS_SHARING_VIOLATION;
|
|
}
|
|
}
|
|
}
|
|
#endif
|
|
if (PagingFileCreate)
|
|
{
|
|
/* FIXME:
|
|
* Do more checking for page files. It is possible,
|
|
* that the file was opened and closed previously
|
|
* as a normal cached file. In this case, the cache
|
|
* manager has referenced the fileobject and the fcb
|
|
* is held in memory. Try to remove the fileobject
|
|
* from cache manager and use the fcb.
|
|
*/
|
|
if (pFcb->RefCount > 1)
|
|
{
|
|
if(!BooleanFlagOn(pFcb->Flags, FCB_IS_PAGE_FILE))
|
|
{
|
|
VfatCloseFile(DeviceExt, FileObject);
|
|
vfatAddToStat(DeviceExt, Fat.FailedCreates, 1);
|
|
return STATUS_INVALID_PARAMETER;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
pFcb->Flags |= FCB_IS_PAGE_FILE;
|
|
SetFlag(DeviceExt->Flags, VCB_IS_SYS_OR_HAS_PAGE);
|
|
}
|
|
}
|
|
else
|
|
{
|
|
if (BooleanFlagOn(pFcb->Flags, FCB_IS_PAGE_FILE))
|
|
{
|
|
VfatCloseFile(DeviceExt, FileObject);
|
|
vfatAddToStat(DeviceExt, Fat.FailedCreates, 1);
|
|
return STATUS_INVALID_PARAMETER;
|
|
}
|
|
}
|
|
|
|
if (RequestedDisposition == FILE_OVERWRITE ||
|
|
RequestedDisposition == FILE_OVERWRITE_IF ||
|
|
RequestedDisposition == FILE_SUPERSEDE)
|
|
{
|
|
if ((BooleanFlagOn(*pFcb->Attributes, FILE_ATTRIBUTE_HIDDEN) && !BooleanFlagOn(Attributes, FILE_ATTRIBUTE_HIDDEN)) ||
|
|
(BooleanFlagOn(*pFcb->Attributes, FILE_ATTRIBUTE_SYSTEM) && !BooleanFlagOn(Attributes, FILE_ATTRIBUTE_SYSTEM)))
|
|
{
|
|
VfatCloseFile(DeviceExt, FileObject);
|
|
vfatAddToStat(DeviceExt, Fat.FailedCreates, 1);
|
|
return STATUS_ACCESS_DENIED;
|
|
}
|
|
|
|
if (!vfatFCBIsDirectory(pFcb))
|
|
{
|
|
LARGE_INTEGER SystemTime;
|
|
|
|
if (RequestedDisposition == FILE_SUPERSEDE)
|
|
{
|
|
*pFcb->Attributes = Attributes;
|
|
}
|
|
else
|
|
{
|
|
*pFcb->Attributes |= Attributes;
|
|
}
|
|
*pFcb->Attributes |= FILE_ATTRIBUTE_ARCHIVE;
|
|
|
|
KeQuerySystemTime(&SystemTime);
|
|
if (vfatVolumeIsFatX(DeviceExt))
|
|
{
|
|
FsdSystemTimeToDosDateTime(DeviceExt,
|
|
&SystemTime, &pFcb->entry.FatX.UpdateDate,
|
|
&pFcb->entry.FatX.UpdateTime);
|
|
}
|
|
else
|
|
{
|
|
FsdSystemTimeToDosDateTime(DeviceExt,
|
|
&SystemTime, &pFcb->entry.Fat.UpdateDate,
|
|
&pFcb->entry.Fat.UpdateTime);
|
|
}
|
|
|
|
VfatUpdateEntry(DeviceExt, pFcb);
|
|
}
|
|
|
|
ExAcquireResourceExclusiveLite(&(pFcb->MainResource), TRUE);
|
|
Status = VfatSetAllocationSizeInformation(FileObject,
|
|
pFcb,
|
|
DeviceExt,
|
|
&Irp->Overlay.AllocationSize);
|
|
ExReleaseResourceLite(&(pFcb->MainResource));
|
|
if (!NT_SUCCESS (Status))
|
|
{
|
|
VfatCloseFile(DeviceExt, FileObject);
|
|
vfatAddToStat(DeviceExt, Fat.FailedCreates, 1);
|
|
return Status;
|
|
}
|
|
}
|
|
|
|
if (RequestedDisposition == FILE_SUPERSEDE)
|
|
{
|
|
Irp->IoStatus.Information = FILE_SUPERSEDED;
|
|
}
|
|
else if (RequestedDisposition == FILE_OVERWRITE ||
|
|
RequestedDisposition == FILE_OVERWRITE_IF)
|
|
{
|
|
Irp->IoStatus.Information = FILE_OVERWRITTEN;
|
|
}
|
|
else
|
|
{
|
|
Irp->IoStatus.Information = FILE_OPENED;
|
|
}
|
|
}
|
|
|
|
if (pFcb->OpenHandleCount == 0)
|
|
{
|
|
IoSetShareAccess(Stack->Parameters.Create.SecurityContext->DesiredAccess,
|
|
Stack->Parameters.Create.ShareAccess,
|
|
FileObject,
|
|
&pFcb->FCBShareAccess);
|
|
}
|
|
else
|
|
{
|
|
IoUpdateShareAccess(FileObject,
|
|
&pFcb->FCBShareAccess);
|
|
}
|
|
|
|
pCcb = FileObject->FsContext2;
|
|
if (BooleanFlagOn(RequestedOptions, FILE_DELETE_ON_CLOSE))
|
|
{
|
|
pCcb->Flags |= CCB_DELETE_ON_CLOSE;
|
|
}
|
|
|
|
if (Irp->IoStatus.Information == FILE_CREATED)
|
|
{
|
|
vfatReportChange(DeviceExt,
|
|
pFcb,
|
|
(vfatFCBIsDirectory(pFcb) ?
|
|
FILE_NOTIFY_CHANGE_DIR_NAME : FILE_NOTIFY_CHANGE_FILE_NAME),
|
|
FILE_ACTION_ADDED);
|
|
}
|
|
else if (Irp->IoStatus.Information == FILE_OVERWRITTEN ||
|
|
Irp->IoStatus.Information == FILE_SUPERSEDED)
|
|
{
|
|
vfatReportChange(DeviceExt,
|
|
pFcb,
|
|
FILE_NOTIFY_CHANGE_LAST_WRITE | FILE_NOTIFY_CHANGE_ATTRIBUTES | FILE_NOTIFY_CHANGE_SIZE,
|
|
FILE_ACTION_MODIFIED);
|
|
}
|
|
|
|
pFcb->OpenHandleCount++;
|
|
DeviceExt->OpenHandleCount++;
|
|
|
|
/* FIXME : test write access if requested */
|
|
|
|
/* FIXME: That is broken, we cannot reach this code path with failure */
|
|
ASSERT(NT_SUCCESS(Status));
|
|
if (NT_SUCCESS(Status))
|
|
{
|
|
vfatAddToStat(DeviceExt, Fat.SuccessfulCreates, 1);
|
|
}
|
|
else
|
|
{
|
|
vfatAddToStat(DeviceExt, Fat.FailedCreates, 1);
|
|
}
|
|
|
|
return Status;
|
|
}
|
|
|
|
/*
|
|
* FUNCTION: Create or open a file
|
|
*/
|
|
NTSTATUS
|
|
VfatCreate(
|
|
PVFAT_IRP_CONTEXT IrpContext)
|
|
{
|
|
NTSTATUS Status;
|
|
|
|
ASSERT(IrpContext);
|
|
|
|
if (IrpContext->DeviceObject == VfatGlobalData->DeviceObject)
|
|
{
|
|
/* DeviceObject represents FileSystem instead of logical volume */
|
|
DPRINT ("FsdCreate called with file system\n");
|
|
IrpContext->Irp->IoStatus.Information = FILE_OPENED;
|
|
IrpContext->PriorityBoost = IO_DISK_INCREMENT;
|
|
|
|
return STATUS_SUCCESS;
|
|
}
|
|
|
|
IrpContext->Irp->IoStatus.Information = 0;
|
|
ExAcquireResourceExclusiveLite(&IrpContext->DeviceExt->DirResource, TRUE);
|
|
Status = VfatCreateFile(IrpContext->DeviceObject, IrpContext->Irp);
|
|
ExReleaseResourceLite(&IrpContext->DeviceExt->DirResource);
|
|
|
|
if (NT_SUCCESS(Status))
|
|
IrpContext->PriorityBoost = IO_DISK_INCREMENT;
|
|
|
|
return Status;
|
|
}
|
|
|
|
/* EOF */
|