return STATUS_ACCESS_DENIED;
}
- // We can't create directories yet
+ // Was the user trying to create a directory?
if (RequestedOptions & FILE_DIRECTORY_FILE)
{
- DPRINT1("FIXME: Folder creation is still TODO!\n");
- return STATUS_NOT_IMPLEMENTED;
+ // Create the directory on disk
+ Status = NtfsCreateDirectory(DeviceExt,
+ FileObject,
+ BooleanFlagOn(Stack->Flags, SL_CASE_SENSITIVE),
+ BooleanFlagOn(IrpContext->Flags, IRPCONTEXT_CANWAIT));
+ }
+ else
+ {
+ // Create the file record on disk
+ Status = NtfsCreateFileRecord(DeviceExt,
+ FileObject,
+ BooleanFlagOn(Stack->Flags, SL_CASE_SENSITIVE),
+ BooleanFlagOn(IrpContext->Flags, IRPCONTEXT_CANWAIT));
}
- // Create the file record on disk
- Status = NtfsCreateFileRecord(DeviceExt,
- FileObject,
- BooleanFlagOn(Stack->Flags, SL_CASE_SENSITIVE),
- BooleanFlagOn(IrpContext->Flags,IRPCONTEXT_CANWAIT));
if (!NT_SUCCESS(Status))
{
DPRINT1("ERROR: Couldn't create file record!\n");
return Status;
}
- // Before we open the file we just created, we need to change the disposition (upper 8 bits of ULONG)
+ // Before we open the file/directory we just created, we need to change the disposition (upper 8 bits of ULONG)
// from create to open, since we already created the file
Stack->Parameters.Create.Options = (ULONG)FILE_OPEN << 24 | RequestedOptions;
}
/**
-* @name NtfsCreateFileRecord()
+* @name NtfsCreateDirectory()
* @implemented
*
-* Creates a file record and saves it to the MFT. Adds the filename attribute of the
-* created file to the parent directory's index.
+* Creates a file record for a new directory and saves it to the MFT. Adds the filename attribute of the
+* created directory to the parent directory's index.
*
* @param DeviceExt
* Points to the target disk's DEVICE_EXTENSION
*
* @param FileObject
-* Pointer to a FILE_OBJECT describing the file to be created
+* Pointer to a FILE_OBJECT describing the directory to be created
+*
+* @param CaseSensitive
+* Boolean indicating if the function should operate in case-sensitive mode. This will be TRUE
+* if an application created the folder with the FILE_FLAG_POSIX_SEMANTICS flag.
*
* @param CanWait
* Boolean indicating if the function is allowed to wait for exclusive access to the master file table.
* This will only be relevant if the MFT doesn't have any free file records and needs to be enlarged.
-*
+*
* @return
-* STATUS_SUCCESS on success.
+* STATUS_SUCCESS on success.
* STATUS_INSUFFICIENT_RESOURCES if unable to allocate memory for the file record.
-* STATUS_CANT_WAIT if CanWait was FALSE and the function needed to resize the MFT but
+* STATUS_CANT_WAIT if CanWait was FALSE and the function needed to resize the MFT but
* couldn't get immediate, exclusive access to it.
*/
NTSTATUS
-NtfsCreateFileRecord(PDEVICE_EXTENSION DeviceExt,
- PFILE_OBJECT FileObject,
- BOOLEAN CaseSensitive,
- BOOLEAN CanWait)
+NtfsCreateDirectory(PDEVICE_EXTENSION DeviceExt,
+ PFILE_OBJECT FileObject,
+ BOOLEAN CaseSensitive,
+ BOOLEAN CanWait)
{
+
NTSTATUS Status = STATUS_SUCCESS;
PFILE_RECORD_HEADER FileRecord;
PNTFS_ATTR_RECORD NextAttribute;
PFILENAME_ATTRIBUTE FilenameAttribute;
ULONGLONG ParentMftIndex;
ULONGLONG FileMftIndex;
+ PB_TREE Tree;
+ PINDEX_ROOT_ATTRIBUTE NewIndexRoot;
+ ULONG RootLength;
DPRINT1("NtfsCreateFileRecord(%p, %p, %s, %s)\n",
DeviceExt,
CaseSensitive ? "TRUE" : "FALSE",
CanWait ? "TRUE" : "FALSE");
+ // Start with an empty file record
+ FileRecord = NtfsCreateEmptyFileRecord(DeviceExt);
+ if (!FileRecord)
+ {
+ DPRINT1("ERROR: Unable to allocate memory for file record!\n");
+ return STATUS_INSUFFICIENT_RESOURCES;
+ }
+
+ // Set the directory flag
+ FileRecord->Flags |= FRH_DIRECTORY;
+
+ // find where the first attribute will be added
+ NextAttribute = (PNTFS_ATTR_RECORD)((ULONG_PTR)FileRecord + FileRecord->AttributeOffset);
+
+ // add first attribute, $STANDARD_INFORMATION
+ AddStandardInformation(FileRecord, NextAttribute);
+
+ // advance NextAttribute pointer to the next attribute
+ NextAttribute = (PNTFS_ATTR_RECORD)((ULONG_PTR)NextAttribute + (ULONG_PTR)NextAttribute->Length);
+
+ // Add the $FILE_NAME attribute
+ AddFileName(FileRecord, NextAttribute, DeviceExt, FileObject, CaseSensitive, &ParentMftIndex);
+
+ // save a pointer to the filename attribute
+ FilenameAttribute = (PFILENAME_ATTRIBUTE)((ULONG_PTR)NextAttribute + NextAttribute->Resident.ValueOffset);
+
+ // advance NextAttribute pointer to the next attribute
+ NextAttribute = (PNTFS_ATTR_RECORD)((ULONG_PTR)NextAttribute + (ULONG_PTR)NextAttribute->Length);
+
+ // Create an empty b-tree to represent our new index
+ Status = CreateEmptyBTree(&Tree);
+ if (!NT_SUCCESS(Status))
+ {
+ DPRINT1("ERROR: Failed to create empty B-Tree!\n");
+ ExFreePoolWithTag(FileRecord, TAG_NTFS);
+ return Status;
+ }
+
+ // Calculate maximum size of index root
+ ULONG MaxIndexRootSize = DeviceExt->NtfsInfo.BytesPerFileRecord
+ - ((ULONG_PTR)NextAttribute - (ULONG_PTR)FileRecord)
+ - sizeof(ULONG) * 2;
+
+ // Create a new index record from the tree
+ Status = CreateIndexRootFromBTree(DeviceExt,
+ Tree,
+ MaxIndexRootSize,
+ &NewIndexRoot,
+ &RootLength);
+ if (!NT_SUCCESS(Status))
+ {
+ DPRINT1("ERROR: Unable to create empty index root!\n");
+ DestroyBTree(Tree);
+ ExFreePoolWithTag(FileRecord, TAG_NTFS);
+ return Status;
+ }
+
+ // We're done with the B-Tree
+ DestroyBTree(Tree);
+
+ // add the $INDEX_ROOT attribute
+ Status = AddIndexRoot(DeviceExt, FileRecord, NextAttribute, NewIndexRoot, RootLength, L"$I30", 4);
+ if (!NT_SUCCESS(Status))
+ {
+ DPRINT1("ERROR: Failed to add index root to new file record!\n");
+ ExFreePoolWithTag(FileRecord, TAG_NTFS);
+ return Status;
+ }
+
+
+#ifndef NDEBUG
+ NtfsDumpFileRecord(DeviceExt, FileRecord);
+#endif
+
+ // Now that we've built the file record in memory, we need to store it in the MFT.
+ Status = AddNewMftEntry(FileRecord, DeviceExt, &FileMftIndex, CanWait);
+ if (NT_SUCCESS(Status))
+ {
+ // The highest 2 bytes should be the sequence number, unless the parent happens to be root
+ if (FileMftIndex == NTFS_FILE_ROOT)
+ FileMftIndex = FileMftIndex + ((ULONGLONG)NTFS_FILE_ROOT << 48);
+ else
+ FileMftIndex = FileMftIndex + ((ULONGLONG)FileRecord->SequenceNumber << 48);
+
+ DPRINT1("New File Reference: 0x%016I64x\n", FileMftIndex);
+
+ // Add the filename attribute to the filename-index of the parent directory
+ Status = NtfsAddFilenameToDirectory(DeviceExt,
+ ParentMftIndex,
+ FileMftIndex,
+ FilenameAttribute,
+ CaseSensitive);
+ }
+
+ ExFreePoolWithTag(NewIndexRoot, TAG_NTFS);
+ ExFreePoolWithTag(FileRecord, TAG_NTFS);
+
+ return Status;
+}
+
+/**
+* @name NtfsCreateEmptyFileRecord
+* @implemented
+*
+* Creates a new, empty file record, with no attributes.
+*
+* @param DeviceExt
+* Pointer to the DEVICE_EXTENSION of the target volume the file record will be stored on.
+*
+* @return
+* A pointer to the newly-created FILE_RECORD_HEADER if the function succeeds, NULL otherwise.
+*/
+PFILE_RECORD_HEADER
+NtfsCreateEmptyFileRecord(PDEVICE_EXTENSION DeviceExt)
+{
+ PFILE_RECORD_HEADER FileRecord;
+ PNTFS_ATTR_RECORD NextAttribute;
+
+ DPRINT1("NtfsCreateEmptyFileRecord(%p)\n", DeviceExt);
+
// allocate memory for file record
FileRecord = ExAllocatePoolWithTag(NonPagedPool,
DeviceExt->NtfsInfo.BytesPerFileRecord,
if (!FileRecord)
{
DPRINT1("ERROR: Unable to allocate memory for file record!\n");
- return STATUS_INSUFFICIENT_RESOURCES;
+ return NULL;
}
RtlZeroMemory(FileRecord, DeviceExt->NtfsInfo.BytesPerFileRecord);
FileRecord->AttributeOffset = ALIGN_UP_BY(FileRecord->AttributeOffset, ATTR_RECORD_ALIGNMENT);
FileRecord->Flags = FRH_IN_USE;
FileRecord->BytesInUse = FileRecord->AttributeOffset + sizeof(ULONG) * 2;
-
+
// find where the first attribute will be added
NextAttribute = (PNTFS_ATTR_RECORD)((ULONG_PTR)FileRecord + FileRecord->AttributeOffset);
NextAttribute->Type = AttributeEnd;
NextAttribute->Length = FILE_RECORD_END;
+ return FileRecord;
+}
+
+
+/**
+* @name NtfsCreateFileRecord()
+* @implemented
+*
+* Creates a file record and saves it to the MFT. Adds the filename attribute of the
+* created file to the parent directory's index.
+*
+* @param DeviceExt
+* Points to the target disk's DEVICE_EXTENSION
+*
+* @param FileObject
+* Pointer to a FILE_OBJECT describing the file to be created
+*
+* @param CanWait
+* Boolean indicating if the function is allowed to wait for exclusive access to the master file table.
+* This will only be relevant if the MFT doesn't have any free file records and needs to be enlarged.
+*
+* @return
+* STATUS_SUCCESS on success.
+* STATUS_INSUFFICIENT_RESOURCES if unable to allocate memory for the file record.
+* STATUS_CANT_WAIT if CanWait was FALSE and the function needed to resize the MFT but
+* couldn't get immediate, exclusive access to it.
+*/
+NTSTATUS
+NtfsCreateFileRecord(PDEVICE_EXTENSION DeviceExt,
+ PFILE_OBJECT FileObject,
+ BOOLEAN CaseSensitive,
+ BOOLEAN CanWait)
+{
+ NTSTATUS Status = STATUS_SUCCESS;
+ PFILE_RECORD_HEADER FileRecord;
+ PNTFS_ATTR_RECORD NextAttribute;
+ PFILENAME_ATTRIBUTE FilenameAttribute;
+ ULONGLONG ParentMftIndex;
+ ULONGLONG FileMftIndex;
+
+ DPRINT1("NtfsCreateFileRecord(%p, %p, %s, %s)\n",
+ DeviceExt,
+ FileObject,
+ CaseSensitive ? "TRUE" : "FALSE",
+ CanWait ? "TRUE" : "FALSE");
+
+ // allocate memory for file record
+ FileRecord = NtfsCreateEmptyFileRecord(DeviceExt);
+ if (!FileRecord)
+ {
+ DPRINT1("ERROR: Unable to allocate memory for file record!\n");
+ return STATUS_INSUFFICIENT_RESOURCES;
+ }
+
+ // find where the first attribute will be added
+ NextAttribute = (PNTFS_ATTR_RECORD)((ULONG_PTR)FileRecord + FileRecord->AttributeOffset);
+
// add first attribute, $STANDARD_INFORMATION
AddStandardInformation(FileRecord, NextAttribute);
-
+
// advance NextAttribute pointer to the next attribute
NextAttribute = (PNTFS_ATTR_RECORD)((ULONG_PTR)NextAttribute + (ULONG_PTR)NextAttribute->Length);
// add the $DATA attribute
AddData(FileRecord, NextAttribute);
+#ifndef NDEBUG
// dump file record in memory (for debugging)
NtfsDumpFileRecord(DeviceExt, FileRecord);
+#endif
// Now that we've built the file record in memory, we need to store it in the MFT.
Status = AddNewMftEntry(FileRecord, DeviceExt, &FileMftIndex, CanWait);
projects / reactos.git / blobdiff