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sys,dll,inc: implement new Delete design and POSIX semantics

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This commit is contained in:
Bill Zissimopoulos
2021-10-19 15:23:15 +01:00
parent 3e66082f11
commit 19823d84de
15 changed files with 424 additions and 74 deletions
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64
src/sys/file.c
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@ -43,6 +43,7 @@ NTSTATUS FspFileNodeOpen(FSP_FILE_NODE *FileNode, PFILE_OBJECT FileObject,
VOID FspFileNodeCleanup(FSP_FILE_NODE *FileNode, PFILE_OBJECT FileObject, PULONG PCleanupFlags);
VOID FspFileNodeCleanupFlush(FSP_FILE_NODE *FileNode, PFILE_OBJECT FileObject);
VOID FspFileNodeCleanupComplete(FSP_FILE_NODE *FileNode, PFILE_OBJECT FileObject);
VOID FspFileNodePosixDelete(FSP_FILE_NODE *FileNode, PFILE_OBJECT FileObject);
VOID FspFileNodeClose(FSP_FILE_NODE *FileNode,
PFILE_OBJECT FileObject, /* non-0 to remove share access */
BOOLEAN HandleCleanup); /* TRUE to decrement handle count */
@ -141,6 +142,7 @@ VOID FspFileNodeOplockComplete(PVOID Context, PIRP Irp);
#pragma alloc_text(PAGE, FspFileNodeCleanup)
#pragma alloc_text(PAGE, FspFileNodeCleanupFlush)
#pragma alloc_text(PAGE, FspFileNodeCleanupComplete)
#pragma alloc_text(PAGE, FspFileNodePosixDelete)
#pragma alloc_text(PAGE, FspFileNodeClose)
#pragma alloc_text(PAGE, FspFileNodeFlushAndPurgeCache)
#pragma alloc_text(PAGE, FspFileNodeOverwriteStreams)
@ -909,7 +911,7 @@ VOID FspFileNodeCleanupComplete(FSP_FILE_NODE *FileNode, PFILE_OBJECT FileObject
DeletePending = 0 != FileNode->DeletePending;
MemoryBarrier();
if (DeletePending)
if (DeletePending && !FileNode->PosixDelete)
{
FspFsvolDeviceDeleteContextByName(FsvolDeviceObject, &FileNode->FileName,
&DeletedFromContextTable);
@ -1013,6 +1015,66 @@ VOID FspFileNodeCleanupComplete(FSP_FILE_NODE *FileNode, PFILE_OBJECT FileObject
FspFileNodeDereference(FileNode);
}
VOID FspFileNodePosixDelete(FSP_FILE_NODE *FileNode, PFILE_OBJECT FileObject)
{
/*
* Perform a POSIX delete of a FileNode. This removes the FileNode from the Context table.
*
* The FileNode must be acquired exclusive (Main or Full) when calling this function.
*/
PAGED_CODE();
PDEVICE_OBJECT FsvolDeviceObject = FileNode->FsvolDeviceObject;
FSP_FSVOL_DEVICE_EXTENSION *FsvolDeviceExtension = FspFsvolDeviceExtension(FsvolDeviceObject);
BOOLEAN DeletedFromContextTable = FALSE;
FspFsvolDeviceLockContextTable(FsvolDeviceObject);
FspFsvolDeviceDeleteContextByName(FsvolDeviceObject, &FileNode->FileName,
&DeletedFromContextTable);
ASSERT(DeletedFromContextTable);
FileNode->OpenCount = 0;
if (FsvolDeviceExtension->VolumeParams.NamedStreams &&
0 == FileNode->MainFileNode)
{
BOOLEAN StreamDeletedFromContextTable;
USHORT FileNameLength = FileNode->FileName.Length;
GATHER_DESCENDANTS(&FileNode->FileName, FALSE,
if (DescendantFileNode->FileName.Length > FileNameLength &&
L'\\' == DescendantFileNode->FileName.Buffer[FileNameLength / sizeof(WCHAR)])
break;
ASSERT(FileNode != DescendantFileNode);
ASSERT(0 != DescendantFileNode->OpenCount);
);
for (
DescendantFileNodeIndex = 0;
DescendantFileNodeCount > DescendantFileNodeIndex;
DescendantFileNodeIndex++)
{
DescendantFileNode = DescendantFileNodes[DescendantFileNodeIndex];
FspFsvolDeviceDeleteContextByName(FsvolDeviceObject, &DescendantFileNode->FileName,
&StreamDeletedFromContextTable);
if (StreamDeletedFromContextTable)
{
DescendantFileNode->OpenCount = 0;
FspFileNodeDereference(DescendantFileNode);
}
}
SCATTER_DESCENDANTS(FALSE);
}
FspFsvolDeviceUnlockContextTable(FsvolDeviceObject);
FspFileNodeDereference(FileNode);
}
VOID FspFileNodeClose(FSP_FILE_NODE *FileNode,
PFILE_OBJECT FileObject, /* non-0 to remove share access */
BOOLEAN HandleCleanup) /* TRUE to decrement handle count */