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sys: IRP_MJ_CLEANUP

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This commit is contained in:
Bill Zissimopoulos 2015-12-07 23:36:12 -08:00
parent 106b3ab0c7
commit 51865f5e44
3 changed files with 60 additions and 3 deletions
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57
src/sys/cleanup.c
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@ -59,6 +59,63 @@ static NTSTATUS FspFsvolCleanup(
FSP_FSVRT_DEVICE_EXTENSION *FsvrtDeviceExtension =
FspFsvrtDeviceExtension(FsvrtDeviceObject);
PFILE_OBJECT FileObject = IrpSp->FileObject;
FSP_FILE_CONTEXT *FsContext = FileObject->FsContext;
BOOLEAN FileNameRequired = 0 != FsvrtDeviceExtension->VolumeParams.FileNameRequired;
BOOLEAN DeletePending;
LONG OpenCount;
FSP_FSCTL_TRANSACT_REQ *Request;
/* lock the FsContext */
ExAcquireResourceExclusiveLite(FsContext->Header.Resource, TRUE);
/* propagate the FsContext DeleteOnClose to DeletePending */
if (FsContext->DeleteOnClose)
FsContext->DeletePending = TRUE;
DeletePending = FsContext->DeletePending;
/* all handles on this FileObject are gone; decrement its FsContext->OpenCount */
OpenCount = FspFileContextClose(FsContext);
/* unlock the FsContext */
ExReleaseResourceLite(FsContext->Header.Resource);
/* is the FsContext going away as well? */
if (0 == OpenCount)
{
/*
* The following must be done under the file system volume device Resource,
* because we are manipulating its GenericTable.
*/
ExAcquireResourceExclusiveLite(&FsvolDeviceExtension->Base.Resource, TRUE);
try
{
/* remove the FsContext from the file system volume device generic table */
FspFsvolDeviceDeleteContext(DeviceObject, FsContext->UserContext, 0);
}
finally
{
ExReleaseResourceLite(&FsvolDeviceExtension->Base.Resource);
}
}
/* create the user-mode file system request */
Result = FspIopCreateRequest(Irp, FileNameRequired ? &FsContext->FileName : 0, 0, &Request);
if (!NT_SUCCESS(Result))
{
/* IRP_MJ_CLEANUP cannot really fail :-\ */
Result = STATUS_SUCCESS;
goto exit;
}
/*
* The new request is associated with our IRP and will be deleted during its completion.
*/
/* populate the Cleanup request */
Request->Kind = FspFsctlTransactCleanupKind;
Request->Req.Cleanup.UserContext = FsContext->UserContext;
Request->Req.Cleanup.UserContext2 = (UINT_PTR)FileObject->FsContext2;
Request->Req.Cleanup.Delete = DeletePending && 0 == OpenCount;
Result = STATUS_PENDING;

2
src/sys/create.c
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@ -688,7 +688,7 @@ static VOID FspFsvolCreateClose(
if (!NT_SUCCESS(Result))
goto leak_exit;
/* populate the CreateClose request */
/* populate the CreateCleanupClose request */
Request->Kind = FspFsctlTransactCreateCleanupCloseKind;
Request->Req.Cleanup.UserContext = FsContext->UserContext;
Request->Req.Cleanup.UserContext2 = (UINT_PTR)FileObject->FsContext2;

4
src/sys/driver.h
View File

@ -405,11 +405,11 @@ VOID FspFileContextOpen(FSP_FILE_CONTEXT *Context)
Context->OpenCount++;
}
static inline
VOID FspFileContextClose(FSP_FILE_CONTEXT *Context)
LONG FspFileContextClose(FSP_FILE_CONTEXT *Context)
{
ASSERT(ExIsResourceAcquiredExclusiveLite(Context->Header.Resource));
ASSERT(0 < Context->OpenCount);
Context->OpenCount--;
return Context->OpenCount--;
}
static inline
VOID FspFileContextRetain(FSP_FILE_CONTEXT *Context)