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sys: wq: FspWq* routiens

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sys: write: initial implementation
This commit is contained in:
Bill Zissimopoulos
2016-02-23 20:07:33 -08:00
parent c30fec9daf
commit 892e8eb025
6 changed files with 275 additions and 6 deletions
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52
src/sys/util.c
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@ -9,7 +9,10 @@
BOOLEAN FspUnicodePathIsValid(PUNICODE_STRING Path, BOOLEAN AllowStreams);
VOID FspUnicodePathSuffix(PUNICODE_STRING Path, PUNICODE_STRING Remain, PUNICODE_STRING Suffix);
NTSTATUS FspCreateGuid(GUID *Guid);
NTSTATUS FspLockUserBuffer(PVOID UserBuffer, ULONG Length,
KPROCESSOR_MODE RequestorMode, LOCK_OPERATION Operation, PMDL *PMdl);
NTSTATUS FspCcSetFileSizes(PFILE_OBJECT FileObject, PCC_FILE_SIZES FileSizes);
NTSTATUS FspCcMdlWriteComplete(PFILE_OBJECT FileObject, PLARGE_INTEGER FileOffset, PMDL MdlChain);
NTSTATUS FspQuerySecurityDescriptorInfo(SECURITY_INFORMATION SecurityInformation,
PSECURITY_DESCRIPTOR SecurityDescriptor, PULONG PLength,
PSECURITY_DESCRIPTOR ObjectsSecurityDescriptor);
@ -26,7 +29,9 @@ static KDEFERRED_ROUTINE FspQueueDelayedWorkItemDPC;
#pragma alloc_text(PAGE, FspUnicodePathIsValid)
#pragma alloc_text(PAGE, FspUnicodePathSuffix)
#pragma alloc_text(PAGE, FspCreateGuid)
#pragma alloc_text(PAGE, FspLockUserBuffer)
#pragma alloc_text(PAGE, FspCcSetFileSizes)
#pragma alloc_text(PAGE, FspCcMdlWriteComplete)
#pragma alloc_text(PAGE, FspQuerySecurityDescriptorInfo)
#pragma alloc_text(PAGE, FspInitializeSynchronousWorkItem)
#pragma alloc_text(PAGE, FspExecuteSynchronousWorkItem)
@ -153,6 +158,31 @@ NTSTATUS FspCreateGuid(GUID *Guid)
return Result;
}
NTSTATUS FspLockUserBuffer(PVOID UserBuffer, ULONG Length,
KPROCESSOR_MODE RequestorMode, LOCK_OPERATION Operation, PMDL *PMdl)
{
PAGED_CODE();
*PMdl = 0;
PMDL Mdl = IoAllocateMdl(UserBuffer, Length, FALSE, FALSE, 0);
if (0 == Mdl)
return STATUS_INSUFFICIENT_RESOURCES;
try
{
MmProbeAndLockPages(Mdl, RequestorMode, Operation);
}
except (EXCEPTION_EXECUTE_HANDLER)
{
IoFreeMdl(Mdl);
return GetExceptionCode();
}
*PMdl = Mdl;
return STATUS_SUCCESS;
}
NTSTATUS FspCcSetFileSizes(PFILE_OBJECT FileObject, PCC_FILE_SIZES FileSizes)
{
PAGED_CODE();
@ -162,12 +192,28 @@ NTSTATUS FspCcSetFileSizes(PFILE_OBJECT FileObject, PCC_FILE_SIZES FileSizes)
CcSetFileSizes(FileObject, FileSizes);
return STATUS_SUCCESS;
}
except(EXCEPTION_EXECUTE_HANDLER)
except (EXCEPTION_EXECUTE_HANDLER)
{
return GetExceptionCode();
}
}
NTSTATUS FspCcMdlWriteComplete(PFILE_OBJECT FileObject, PLARGE_INTEGER FileOffset, PMDL MdlChain)
{
PAGED_CODE();
try
{
CcMdlWriteComplete(FileObject, FileOffset, MdlChain);
return STATUS_SUCCESS;
}
except (EXCEPTION_EXECUTE_HANDLER)
{
CcMdlWriteAbort(FileObject, MdlChain);
return GetExceptionCode();
}
}
NTSTATUS FspQuerySecurityDescriptorInfo(SECURITY_INFORMATION SecurityInformation,
PSECURITY_DESCRIPTOR SecurityDescriptor, PULONG PLength,
PSECURITY_DESCRIPTOR ObjectsSecurityDescriptor)
@ -200,16 +246,18 @@ VOID FspInitializeSynchronousWorkItem(FSP_SYNCHRONOUS_WORK_ITEM *SynchronousWork
ExInitializeWorkItem(&SynchronousWorkItem->WorkQueueItem,
FspExecuteSynchronousWorkItemRoutine, SynchronousWorkItem);
}
VOID FspExecuteSynchronousWorkItem(FSP_SYNCHRONOUS_WORK_ITEM *SynchronousWorkItem)
{
PAGED_CODE();
ExQueueWorkItem(&SynchronousWorkItem->WorkQueueItem, DelayedWorkQueue);
ExQueueWorkItem(&SynchronousWorkItem->WorkQueueItem, CriticalWorkQueue);
NTSTATUS Result;
Result = KeWaitForSingleObject(&SynchronousWorkItem->Event, Executive, KernelMode, FALSE, 0);
ASSERT(STATUS_SUCCESS == Result);
}
static VOID FspExecuteSynchronousWorkItemRoutine(PVOID Context)
{
PAGED_CODE();