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sys: FspFileNodeSetFileInfo: refactoring

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This commit is contained in:
Bill Zissimopoulos 2016-02-02 15:59:25 -08:00
parent 7b5a7cd2f0
commit d0d4c0ed8f
3 changed files with 69 additions and 142 deletions
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48
src/sys/create.c
View File

@ -520,8 +520,6 @@ NTSTATUS FspFsvolCreateComplete(
}
/* populate the FileNode/FileDesc fields from the Response */
FileNode->Header.AllocationSize.QuadPart = Response->Rsp.Create.Opened.FileInfo.AllocationSize;
FileNode->Header.FileSize.QuadPart = Response->Rsp.Create.Opened.FileInfo.FileSize;
FileNode->UserContext = Response->Rsp.Create.Opened.UserContext;
FileNode->IndexNumber = Response->Rsp.Create.Opened.FileInfo.IndexNumber;
FileNode->IsDirectory = BooleanFlagOn(Response->Rsp.Create.Opened.FileInfo.FileAttributes,
@ -558,7 +556,8 @@ NTSTATUS FspFsvolCreateComplete(
FileObject->FsContext = FileNode;
FileObject->FsContext2 = FileDesc;
if (FILE_OPENED == Response->IoStatus.Information)
if (FILE_SUPERSEDED != Response->IoStatus.Information &&
FILE_OVERWRITTEN != Response->IoStatus.Information)
{
/*
* FastFat quote:
@ -577,8 +576,6 @@ NTSTATUS FspFsvolCreateComplete(
Result = FspFsvolCreateTryOpen(Irp, Response, FileNode, FileDesc, FileObject, FlushImage);
}
else
if (FILE_SUPERSEDED == Response->IoStatus.Information ||
FILE_OVERWRITTEN == Response->IoStatus.Information)
{
/*
* Oh, noes! We have to go back to user mode to overwrite the file!
@ -623,14 +620,16 @@ NTSTATUS FspFsvolCreateComplete(
*/
FspIoqPostIrpBestEffort(FsvolDeviceExtension->Ioq, Irp, &Result);
}
else
{
/* SUCCESS! */
FspFileNodeSetFileInfo(FileNode, &Response->Rsp.Create.Opened.FileInfo);
FspIopRequestContext(Request, RequestFileDesc) = 0;
Irp->IoStatus.Information = (ULONG_PTR)Response->IoStatus.Information;
Result = STATUS_SUCCESS;
}
}
else if (FspFsctlTransactReservedKind == Request->Kind)
{
/*
* A Reserved request is a special request used when retrying a file open.
*/
BOOLEAN FlushImage = 0 != FspIopRequestContext(Request, RequestState);
Result = FspFsvolCreateTryOpen(Irp, Response, FileNode, FileDesc, FileObject, FlushImage);
}
else if (FspFsctlTransactOverwriteKind == Request->Kind)
{
@ -648,28 +647,14 @@ NTSTATUS FspFsvolCreateComplete(
}
/* file was successfully overwritten/superseded */
FspFileObjectSetSizes(FileObject,
Response->Rsp.Overwrite.FileInfo.AllocationSize,
Response->Rsp.Overwrite.FileInfo.FileSize);
FspFileNodeSetFileInfo(FileNode, FileObject, &Response->Rsp.Overwrite.FileInfo);
FspFileNodeRelease(FileNode, Full);
/* SUCCESS! */
FspFileNodeSetFileInfo(FileNode, &Response->Rsp.Overwrite.FileInfo);
FspIopRequestContext(Request, RequestFileDesc) = 0;
Irp->IoStatus.Information = Request->Req.Overwrite.Supersede ? FILE_SUPERSEDED : FILE_OVERWRITTEN;
Result = STATUS_SUCCESS;
}
else if (FspFsctlTransactReservedKind == Request->Kind)
{
/*
* A Reserved request is a special request used when retrying a file open.
*/
BOOLEAN FlushImage = 0 != FspIopRequestContext(Request, RequestState);
Result = FspFsvolCreateTryOpen(Irp, Response, FileNode, FileDesc, FileObject, FlushImage);
}
else
ASSERT(0);
@ -712,9 +697,7 @@ static NTSTATUS FspFsvolCreateTryOpen(PIRP Irp, const FSP_FSCTL_TRANSACT_RSP *Re
return Result;
}
FspFileObjectSetSizes(FileObject,
Response->Rsp.Create.Opened.FileInfo.AllocationSize,
Response->Rsp.Create.Opened.FileInfo.FileSize);
FspFileNodeSetFileInfo(FileNode, FileObject, &Response->Rsp.Create.Opened.FileInfo);
if (FlushImage)
{
@ -739,9 +722,8 @@ static NTSTATUS FspFsvolCreateTryOpen(PIRP Irp, const FSP_FSCTL_TRANSACT_RSP *Re
FspFileNodeRelease(FileNode, Full);
/* SUCCESS! */
FspFileNodeSetFileInfo(FileNode, &Response->Rsp.Create.Opened.FileInfo);
FspIopRequestContext(Request, RequestFileDesc) = 0;
Irp->IoStatus.Information = FILE_OPENED;
Irp->IoStatus.Information = Response->IoStatus.Information;
return STATUS_SUCCESS;
}

23
src/sys/driver.h
View File

@ -555,15 +555,6 @@ typedef struct
ERESOURCE PagingIoResource;
FAST_MUTEX HeaderFastMutex;
SECTION_OBJECT_POINTERS SectionObjectPointers;
/* FileInfo */
KSPIN_LOCK InfoSpinLock;
UINT64 InfoExpirationTime;
UINT32 FileAttributes;
UINT32 ReparseTag;
UINT64 CreationTime;
UINT64 LastAccessTime;
UINT64 LastWriteTime;
UINT64 ChangeTime;
} FSP_FILE_NODE_NONPAGED;
typedef struct
{
@ -579,7 +570,14 @@ typedef struct
UINT32 DeleteOnClose:1;
UINT32 DeletePending:1;
} Flags;
/* locked under same rules as Header.AllocationSize/FileSize */
/* locked under Header.Resource */
UINT64 InfoExpirationTime;
UINT32 FileAttributes;
UINT32 ReparseTag;
UINT64 CreationTime;
UINT64 LastAccessTime;
UINT64 LastWriteTime;
UINT64 ChangeTime;
NTSTATUS CcStatus;
/* read-only after creation (and insertion in the ContextTable) */
PDEVICE_OBJECT FsvolDeviceObject;
@ -623,11 +621,10 @@ VOID FspFileNodeClose(FSP_FILE_NODE *FileNode, PFILE_OBJECT FileObject,
PBOOLEAN PDeletePending);
VOID FspFileNodeGetFileInfo(FSP_FILE_NODE *FileNode, FSP_FSCTL_FILE_INFO *FileInfo);
BOOLEAN FspFileNodeTryGetFileInfo(FSP_FILE_NODE *FileNode, FSP_FSCTL_FILE_INFO *FileInfo);
VOID FspFileNodeSetFileInfo(FSP_FILE_NODE *FileNode, const FSP_FSCTL_FILE_INFO *FileInfo);
VOID FspFileNodeSetFileInfo(FSP_FILE_NODE *FileNode, PFILE_OBJECT CcFileObject,
const FSP_FSCTL_FILE_INFO *FileInfo);
NTSTATUS FspFileDescCreate(FSP_FILE_DESC **PFileDesc);
VOID FspFileDescDelete(FSP_FILE_DESC *FileDesc);
VOID FspFileObjectSetSizes(PFILE_OBJECT FileObject,
UINT64 AllocationSize, UINT64 FileSize);
#define FspFileNodeAcquireShared(N,F) FspFileNodeAcquireSharedF(N, FspFileNodeAcquire ## F)
#define FspFileNodeTryAcquireShared(N,F) FspFileNodeTryAcquireSharedF(N, FspFileNodeAcquire ## F)
#define FspFileNodeAcquireExclusive(N,F) FspFileNodeAcquireExclusiveF(N, FspFileNodeAcquire ## F)

140
src/sys/file.c
View File

@ -22,11 +22,10 @@ VOID FspFileNodeClose(FSP_FILE_NODE *FileNode, PFILE_OBJECT FileObject,
PBOOLEAN PDeletePending);
VOID FspFileNodeGetFileInfo(FSP_FILE_NODE *FileNode, FSP_FSCTL_FILE_INFO *FileInfo);
BOOLEAN FspFileNodeTryGetFileInfo(FSP_FILE_NODE *FileNode, FSP_FSCTL_FILE_INFO *FileInfo);
VOID FspFileNodeSetFileInfo(FSP_FILE_NODE *FileNode, const FSP_FSCTL_FILE_INFO *FileInfo);
VOID FspFileNodeSetFileInfo(FSP_FILE_NODE *FileNode, PFILE_OBJECT CcFileObject,
const FSP_FSCTL_FILE_INFO *FileInfo);
NTSTATUS FspFileDescCreate(FSP_FILE_DESC **PFileDesc);
VOID FspFileDescDelete(FSP_FILE_DESC *FileDesc);
VOID FspFileObjectSetSizes(PFILE_OBJECT FileObject,
UINT64 AllocationSize, UINT64 FileSize);
#ifdef ALLOC_PRAGMA
#pragma alloc_text(PAGE, FspFileNodeCreate)
@ -45,7 +44,6 @@ VOID FspFileObjectSetSizes(PFILE_OBJECT FileObject,
#pragma alloc_text(PAGE, FspFileNodeSetFileInfo)
#pragma alloc_text(PAGE, FspFileDescCreate)
#pragma alloc_text(PAGE, FspFileDescDelete)
#pragma alloc_text(PAGE, FspFileObjectSetSizes)
#endif
NTSTATUS FspFileNodeCreate(PDEVICE_OBJECT DeviceObject,
@ -70,7 +68,6 @@ NTSTATUS FspFileNodeCreate(PDEVICE_OBJECT DeviceObject,
ExInitializeResourceLite(&NonPaged->Resource);
ExInitializeResourceLite(&NonPaged->PagingIoResource);
ExInitializeFastMutex(&NonPaged->HeaderFastMutex);
KeInitializeSpinLock(&NonPaged->InfoSpinLock);
RtlZeroMemory(FileNode, sizeof *FileNode + ExtraSize);
FileNode->Header.NodeTypeCode = FspFileNodeFileKind;
@ -355,103 +352,69 @@ VOID FspFileNodeClose(FSP_FILE_NODE *FileNode, PFILE_OBJECT FileObject,
*PDeletePending = Deleted && DeletePending;
}
static VOID FspFileNodeGetFileInfoNp(FSP_FILE_NODE_NONPAGED *FileNodeNp, FSP_FSCTL_FILE_INFO *FileInfoNp)
{
// !PAGED_CODE();
KIRQL Irql;
KeAcquireSpinLock(&FileNodeNp->InfoSpinLock, &Irql);
FileInfoNp->FileAttributes = FileNodeNp->FileAttributes;
FileInfoNp->ReparseTag = FileNodeNp->ReparseTag;
FileInfoNp->CreationTime = FileNodeNp->CreationTime;
FileInfoNp->LastAccessTime = FileNodeNp->LastAccessTime;
FileInfoNp->LastWriteTime = FileNodeNp->LastWriteTime;
FileInfoNp->ChangeTime = FileNodeNp->ChangeTime;
KeReleaseSpinLock(&FileNodeNp->InfoSpinLock, Irql);
}
static BOOLEAN FspFileNodeTryGetFileInfoNp(FSP_FILE_NODE_NONPAGED *FileNodeNp,
FSP_FSCTL_FILE_INFO *FileInfoNp)
{
// !PAGED_CODE();
KIRQL Irql;
BOOLEAN Result;
KeAcquireSpinLock(&FileNodeNp->InfoSpinLock, &Irql);
if (0 < FileNodeNp->InfoExpirationTime && KeQueryInterruptTime() < FileNodeNp->InfoExpirationTime)
{
FileInfoNp->FileAttributes = FileNodeNp->FileAttributes;
FileInfoNp->ReparseTag = FileNodeNp->ReparseTag;
FileInfoNp->CreationTime = FileNodeNp->CreationTime;
FileInfoNp->LastAccessTime = FileNodeNp->LastAccessTime;
FileInfoNp->LastWriteTime = FileNodeNp->LastWriteTime;
FileInfoNp->ChangeTime = FileNodeNp->ChangeTime;
Result = TRUE;
}
else
Result = FALSE;
KeReleaseSpinLock(&FileNodeNp->InfoSpinLock, Irql);
return Result;
}
static VOID FspFileNodeSetFileInfoNp(FSP_FILE_NODE_NONPAGED *FileNodeNp,
const FSP_FSCTL_FILE_INFO *FileInfoNp, UINT64 FileInfoTimeout)
{
// !PAGED_CODE();
KIRQL Irql;
KeAcquireSpinLock(&FileNodeNp->InfoSpinLock, &Irql);
FileNodeNp->FileAttributes = FileInfoNp->FileAttributes;
FileNodeNp->ReparseTag = FileInfoNp->ReparseTag;
FileNodeNp->CreationTime = FileInfoNp->CreationTime;
FileNodeNp->LastAccessTime = FileInfoNp->LastAccessTime;
FileNodeNp->LastWriteTime = FileInfoNp->LastWriteTime;
FileNodeNp->ChangeTime = FileInfoNp->ChangeTime;
FileNodeNp->InfoExpirationTime = 0 != FileInfoTimeout ?
KeQueryInterruptTime() + FileInfoTimeout : 0;
KeReleaseSpinLock(&FileNodeNp->InfoSpinLock, Irql);
}
VOID FspFileNodeGetFileInfo(FSP_FILE_NODE *FileNode, FSP_FSCTL_FILE_INFO *FileInfo)
{
PAGED_CODE();
FSP_FILE_NODE_NONPAGED *FileNodeNp = FileNode->NonPaged;
FSP_FSCTL_FILE_INFO FileInfoNp;
FileInfo->AllocationSize = FileNode->Header.AllocationSize.QuadPart;
FileInfo->FileSize = FileNode->Header.FileSize.QuadPart;
FspFileNodeGetFileInfoNp(FileNodeNp, &FileInfoNp);
*FileInfo = FileInfoNp;
FileInfo->FileAttributes = FileNode->FileAttributes;
FileInfo->ReparseTag = FileNode->ReparseTag;
FileInfo->CreationTime = FileNode->CreationTime;
FileInfo->LastAccessTime = FileNode->LastAccessTime;
FileInfo->LastWriteTime = FileNode->LastWriteTime;
FileInfo->ChangeTime = FileNode->ChangeTime;
}
BOOLEAN FspFileNodeTryGetFileInfo(FSP_FILE_NODE *FileNode, FSP_FSCTL_FILE_INFO *FileInfo)
{
PAGED_CODE();
FSP_FILE_NODE_NONPAGED *FileNodeNp = FileNode->NonPaged;
FSP_FSCTL_FILE_INFO FileInfoNp;
BOOLEAN Result;
if (!FspFileNodeTryGetFileInfoNp(FileNodeNp, &FileInfoNp))
return FALSE;
if (0 < FileNode->InfoExpirationTime && KeQueryInterruptTime() < FileNode->InfoExpirationTime)
{
FileInfo->AllocationSize = FileNode->Header.AllocationSize.QuadPart;
FileInfo->FileSize = FileNode->Header.FileSize.QuadPart;
*FileInfo = FileInfoNp;
return TRUE;
FileInfo->FileAttributes = FileNode->FileAttributes;
FileInfo->ReparseTag = FileNode->ReparseTag;
FileInfo->CreationTime = FileNode->CreationTime;
FileInfo->LastAccessTime = FileNode->LastAccessTime;
FileInfo->LastWriteTime = FileNode->LastWriteTime;
FileInfo->ChangeTime = FileNode->ChangeTime;
Result = TRUE;
}
else
Result = FALSE;
return Result;
}
VOID FspFileNodeSetFileInfo(FSP_FILE_NODE *FileNode, const FSP_FSCTL_FILE_INFO *FileInfo)
VOID FspFileNodeSetFileInfo(FSP_FILE_NODE *FileNode, PFILE_OBJECT CcFileObject,
const FSP_FSCTL_FILE_INFO *FileInfo)
{
PAGED_CODE();
UINT64 FileInfoTimeout = FspFsvolDeviceExtension(FileNode->FsvolDeviceObject)->
VolumeParams.FileInfoTimeout * 10000ULL;
FSP_FILE_NODE_NONPAGED *FileNodeNp = FileNode->NonPaged;
FSP_FSCTL_FILE_INFO FileInfoNp = *FileInfo;
FspFileNodeSetFileInfoNp(FileNodeNp, &FileInfoNp, FileInfoTimeout);
FileNode->Header.AllocationSize.QuadPart = FileInfo->AllocationSize;
FileNode->Header.FileSize.QuadPart = FileInfo->FileSize;
FileNode->FileAttributes = FileInfo->FileAttributes;
FileNode->ReparseTag = FileInfo->ReparseTag;
FileNode->CreationTime = FileInfo->CreationTime;
FileNode->LastAccessTime = FileInfo->LastAccessTime;
FileNode->LastWriteTime = FileInfo->LastWriteTime;
FileNode->ChangeTime = FileInfo->ChangeTime;
FileNode->InfoExpirationTime = 0 != FileInfoTimeout ?
KeQueryInterruptTime() + FileInfoTimeout : 0;
if (0 != CcFileObject)
FileNode->CcStatus = FspCcSetFileSizes(
CcFileObject, (PCC_FILE_SIZES)&FileNode->Header.AllocationSize);
}
NTSTATUS FspFileDescCreate(FSP_FILE_DESC **PFileDesc)
@ -473,18 +436,3 @@ VOID FspFileDescDelete(FSP_FILE_DESC *FileDesc)
FspFree(FileDesc);
}
VOID FspFileObjectSetSizes(PFILE_OBJECT FileObject,
UINT64 AllocationSize, UINT64 FileSize)
{
PAGED_CODE();
FSP_FILE_NODE *FileNode = FileObject->FsContext;
ASSERT(ExIsResourceAcquiredExclusiveLite(FileNode->Header.PagingIoResource));
FileNode->Header.AllocationSize.QuadPart = AllocationSize;
FileNode->Header.FileSize.QuadPart = FileSize;
FileNode->CcStatus = FspCcSetFileSizes(
FileObject, (PCC_FILE_SIZES)&FileNode->Header.AllocationSize);
}