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sys: FspFileNodeFlushAndPurgeCache

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This commit is contained in:
Bill Zissimopoulos
2016-03-17 10:13:52 -07:00
parent df85107c42
commit b734e6968d
6 changed files with 157 additions and 22 deletions
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66
src/sys/file.c
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@ -13,6 +13,7 @@ VOID FspFileNodeAcquireSharedF(FSP_FILE_NODE *FileNode, ULONG Flags);
BOOLEAN FspFileNodeTryAcquireSharedF(FSP_FILE_NODE *FileNode, ULONG Flags, BOOLEAN Wait);
VOID FspFileNodeAcquireExclusiveF(FSP_FILE_NODE *FileNode, ULONG Flags);
BOOLEAN FspFileNodeTryAcquireExclusiveF(FSP_FILE_NODE *FileNode, ULONG Flags, BOOLEAN Wait);
VOID FspFileNodeConvertExclusiveToSharedF(FSP_FILE_NODE *FileNode, ULONG Flags);
VOID FspFileNodeSetOwnerF(FSP_FILE_NODE *FileNode, ULONG Flags, PVOID Owner);
VOID FspFileNodeReleaseF(FSP_FILE_NODE *FileNode, ULONG Flags);
VOID FspFileNodeReleaseOwnerF(FSP_FILE_NODE *FileNode, ULONG Flags, PVOID Owner);
@ -22,6 +23,8 @@ VOID FspFileNodeCleanup(FSP_FILE_NODE *FileNode, PFILE_OBJECT FileObject,
PBOOLEAN PDeletePending);
VOID FspFileNodeCleanupComplete(FSP_FILE_NODE *FileNode, PFILE_OBJECT FileObject);
VOID FspFileNodeClose(FSP_FILE_NODE *FileNode, PFILE_OBJECT FileObject);
NTSTATUS FspFileNodeFlushAndPurgeCache(FSP_FILE_NODE *FileNode,
UINT64 FlushOffset64, ULONG FlushLength, BOOLEAN FlushAndPurge);
VOID FspFileNodeRename(FSP_FILE_NODE *FileNode, PUNICODE_STRING NewFileName);
BOOLEAN FspFileNodeHasOpenHandles(PDEVICE_OBJECT FsvolDeviceObject,
PUNICODE_STRING FileName, BOOLEAN SubpathOnly);
@ -45,6 +48,7 @@ VOID FspFileDescDelete(FSP_FILE_DESC *FileDesc);
#pragma alloc_text(PAGE, FspFileNodeTryAcquireSharedF)
#pragma alloc_text(PAGE, FspFileNodeAcquireExclusiveF)
#pragma alloc_text(PAGE, FspFileNodeTryAcquireExclusiveF)
#pragma alloc_text(PAGE, FspFileNodeConvertExclusiveToSharedF)
#pragma alloc_text(PAGE, FspFileNodeSetOwnerF)
#pragma alloc_text(PAGE, FspFileNodeReleaseF)
#pragma alloc_text(PAGE, FspFileNodeReleaseOwnerF)
@ -52,6 +56,7 @@ VOID FspFileDescDelete(FSP_FILE_DESC *FileDesc);
#pragma alloc_text(PAGE, FspFileNodeCleanup)
#pragma alloc_text(PAGE, FspFileNodeCleanupComplete)
#pragma alloc_text(PAGE, FspFileNodeClose)
#pragma alloc_text(PAGE, FspFileNodeFlushAndPurgeCache)
#pragma alloc_text(PAGE, FspFileNodeRename)
#pragma alloc_text(PAGE, FspFileNodeHasOpenHandles)
#pragma alloc_text(PAGE, FspFileNodeGetFileInfo)
@ -246,6 +251,19 @@ BOOLEAN FspFileNodeTryAcquireExclusiveF(FSP_FILE_NODE *FileNode, ULONG Flags, BO
return Result;
}
VOID FspFileNodeConvertExclusiveToSharedF(FSP_FILE_NODE *FileNode, ULONG Flags)
{
PAGED_CODE();
FSP_FILE_NODE_GET_FLAGS();
if (Flags & FspFileNodeAcquirePgio)
ExConvertExclusiveToSharedLite(FileNode->Header.PagingIoResource);
if (Flags & FspFileNodeAcquireMain)
ExConvertExclusiveToSharedLite(FileNode->Header.Resource);
}
VOID FspFileNodeSetOwnerF(FSP_FILE_NODE *FileNode, ULONG Flags, PVOID Owner)
{
PAGED_CODE();
@ -515,6 +533,54 @@ VOID FspFileNodeClose(FSP_FILE_NODE *FileNode, PFILE_OBJECT FileObject)
FspFileNodeDereference(FileNode);
}
NTSTATUS FspFileNodeFlushAndPurgeCache(FSP_FILE_NODE *FileNode,
UINT64 FlushOffset64, ULONG FlushLength, BOOLEAN FlushAndPurge)
{
/*
* The FileNode must be acquired exclusive (Full) when calling this function.
*/
PAGED_CODE();
LARGE_INTEGER FlushOffset;
PLARGE_INTEGER PFlushOffset = &FlushOffset;
FSP_FSCTL_FILE_INFO FileInfo;
IO_STATUS_BLOCK IoStatus = { 0 };
FlushOffset.QuadPart = FlushOffset64;
if (FILE_WRITE_TO_END_OF_FILE == FlushOffset.LowPart && -1L == FlushOffset.HighPart)
{
if (FspFileNodeTryGetFileInfo(FileNode, &FileInfo))
FlushOffset.QuadPart = FileInfo.FileSize;
else
PFlushOffset = 0; /* we don't know how big the file is, so flush it all! */
}
if (0 != FspMvCcCoherencyFlushAndPurgeCache)
{
/* if we are on Win7+ use CcCoherencyFlushAndPurgeCache */
FspMvCcCoherencyFlushAndPurgeCache(
&FileNode->NonPaged->SectionObjectPointers, PFlushOffset, FlushLength, &IoStatus,
FlushAndPurge ? 0 : CC_FLUSH_AND_PURGE_NO_PURGE);
return STATUS_CACHE_PAGE_LOCKED == IoStatus.Status ?
STATUS_SUCCESS/* liar! */:
IoStatus.Status;
}
else
{
/* do it the old-fashioned way; non-cached and mmap'ed I/O are non-coherent */
CcFlushCache(&FileNode->NonPaged->SectionObjectPointers, PFlushOffset, FlushLength, &IoStatus);
if (!NT_SUCCESS(IoStatus.Status))
return IoStatus.Status;
if (FlushAndPurge)
CcPurgeCacheSection(&FileNode->NonPaged->SectionObjectPointers, PFlushOffset, FlushLength, FALSE);
return STATUS_SUCCESS;
}
}
VOID FspFileNodeRename(FSP_FILE_NODE *FileNode, PUNICODE_STRING NewFileName)
{
PAGED_CODE();