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sys: IRP_MJ_CREATE

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This commit is contained in:
Bill Zissimopoulos
2015-12-05 11:31:51 -08:00
parent 0e170901c8
commit 0d49e87468
4 changed files with 46 additions and 9 deletions
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26
src/sys/create.c
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@ -403,7 +403,7 @@ VOID FspFsvolCreateComplete(
FsContext->UserContext = Response->Rsp.Create.UserContext;
FileObject->FsContext2 = (PVOID)(UINT_PTR)Response->Rsp.Create.UserContext2;
/* following must be performed under the fsvol lock */
/* lock the file system volume device while accessing its generic table */
ExAcquireResourceExclusiveLite(&FsvolDeviceExtension->Base.Resource, TRUE);
try
{
@ -415,19 +415,34 @@ VOID FspFsvolCreateComplete(
Result = STATUS_INSUFFICIENT_RESOURCES;
else
{
/* do the share access checks */
/* share access check */
if (Inserted)
{
/*
* This is a newly created FsContext. Set its share access and
* increment its open count. There is no need to acquire the
* FsContext's Resource (because it is newly created).
*/
IoSetShareAccess(DesiredAccess, ShareAccess, FileObject,
&FsContext->ShareAccess);
FspFileContextOpen(FsContext);
}
else
{
Result = IoCheckShareAccess(DesiredAccess, ShareAccess, FileObject,
&FsContext->ShareAccess, TRUE);
/*
* This is an existing FsContext. We must acquire its Resource and
* check if there is a delete pending and the share access. Only if
* both tests succeed we increment the open count and report success.
*/
ExAcquireResourceExclusiveLite(FsContext->Header.Resource, TRUE);
if (FsContext->DeletePending)
Result = STATUS_DELETE_PENDING;
else
Result = IoCheckShareAccess(DesiredAccess, ShareAccess, FileObject,
&FsContext->ShareAccess, TRUE);
if (NT_SUCCESS(Result))
FspFileContextOpen(FsContext);
ExReleaseResourceLite(FsContext->Header.Resource);
}
}
}
@ -444,9 +459,10 @@ VOID FspFsvolCreateComplete(
FSP_RETURN();
}
/* does an FsContext with the same UserContext already exist? */
/* did an FsContext with the same UserContext already exist? */
if (!Inserted)
{
/* delete the newly created FsContext and use the existing one */
FspFileContextDelete(FileObject->FsContext);
FileObject->FsContext = FsContext;
}