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sys: FspFsvolFileSystemControlOplock: WIP

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This commit is contained in:
Bill Zissimopoulos 2016-11-08 11:11:52 -08:00
parent 2d98cda607
commit 154aa28381
1 changed files with 34 additions and 48 deletions
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82
src/sys/fsctl.c
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@ -329,20 +329,8 @@ static NTSTATUS FspFsvolFileSystemControlOplock(
ULONG OplockCount;
FSP_FSVOL_FILESYSTEM_CONTROL_OPLOCK_COMPLETION_CONTEXT *CompletionContext;
if (FSCTL_REQUEST_OPLOCK == FsControlCode)
{
if (sizeof(REQUEST_OPLOCK_INPUT_BUFFER) > InputBufferLength ||
sizeof(REQUEST_OPLOCK_OUTPUT_BUFFER) > OutputBufferLength)
return STATUS_BUFFER_TOO_SMALL;
if (FileNode->IsDirectory && !FsRtlOplockIsSharedRequest(Irp))
return STATUS_INVALID_PARAMETER;
}
else
{
if (FileNode->IsDirectory)
return STATUS_INVALID_PARAMETER;
}
if (FileNode->IsDirectory)
return STATUS_INVALID_PARAMETER;
/*
* As per FastFat:
@ -353,6 +341,20 @@ static NTSTATUS FspFsvolFileSystemControlOplock(
switch (FsControlCode)
{
case FSCTL_REQUEST_OPLOCK:
if (sizeof(REQUEST_OPLOCK_INPUT_BUFFER) > InputBufferLength ||
sizeof(REQUEST_OPLOCK_OUTPUT_BUFFER) > OutputBufferLength)
return STATUS_BUFFER_TOO_SMALL;
if (FlagOn(((PREQUEST_OPLOCK_INPUT_BUFFER)InputBuffer)->Flags,
REQUEST_OPLOCK_INPUT_FLAG_REQUEST))
goto exclusive;
if (FlagOn(((PREQUEST_OPLOCK_INPUT_BUFFER)InputBuffer)->Flags,
REQUEST_OPLOCK_INPUT_FLAG_ACK))
goto shared;
/* one of REQUEST_OPLOCK_INPUT_FLAG_REQUEST or REQUEST_OPLOCK_INPUT_FLAG_ACK required */
return STATUS_INVALID_PARAMETER;
case FSCTL_REQUEST_OPLOCK_LEVEL_1:
case FSCTL_REQUEST_OPLOCK_LEVEL_2:
case FSCTL_REQUEST_BATCH_OPLOCK:
@ -366,29 +368,7 @@ static NTSTATUS FspFsvolFileSystemControlOplock(
FspFsvolDeviceUnlockContextTable(FsvolDeviceObject);
}
else
{
if (!FileNode->IsDirectory)
/* ???: Win8 and FsRtlCheckLockForOplockRequest? see FastFat */
OplockCount = FsRtlAreThereCurrentOrInProgressFileLocks(&FileNode->FileLock);
else
OplockCount = 0;
}
if (FSCTL_REQUEST_FILTER_OPLOCK == FsControlCode ||
FSCTL_REQUEST_BATCH_OPLOCK == FsControlCode ||
(FSCTL_REQUEST_OPLOCK == FsControlCode &&
FlagOn(((PREQUEST_OPLOCK_INPUT_BUFFER)InputBuffer)->RequestedOplockLevel,
OPLOCK_LEVEL_CACHE_HANDLE)))
{
BOOLEAN DeletePending;
DeletePending = 0 != FileNode->DeletePending;
MemoryBarrier();
if (DeletePending)
{
FspFileNodeRelease(FileNode, Main);
return STATUS_DELETE_PENDING;
}
}
OplockCount = FsRtlAreThereCurrentOrInProgressFileLocks(&FileNode->FileLock);
break;
case FSCTL_OPLOCK_BREAK_ACKNOWLEDGE:
@ -400,17 +380,6 @@ static NTSTATUS FspFsvolFileSystemControlOplock(
OplockCount = 0;
break;
case FSCTL_REQUEST_OPLOCK:
if (FlagOn(((PREQUEST_OPLOCK_INPUT_BUFFER)InputBuffer)->Flags,
REQUEST_OPLOCK_INPUT_FLAG_REQUEST))
goto exclusive;
if (FlagOn(((PREQUEST_OPLOCK_INPUT_BUFFER)InputBuffer)->Flags,
REQUEST_OPLOCK_INPUT_FLAG_ACK))
goto shared;
/* one of REQUEST_OPLOCK_INPUT_FLAG_REQUEST or REQUEST_OPLOCK_INPUT_FLAG_ACK required */
return STATUS_INVALID_PARAMETER;
default:
ASSERT(0);
return STATUS_INVALID_DEVICE_REQUEST;
@ -421,6 +390,23 @@ static NTSTATUS FspFsvolFileSystemControlOplock(
* Make sure to release it before exiting!
*/
if (FSCTL_REQUEST_FILTER_OPLOCK == FsControlCode ||
FSCTL_REQUEST_BATCH_OPLOCK == FsControlCode ||
(FSCTL_REQUEST_OPLOCK == FsControlCode &&
FlagOn(((PREQUEST_OPLOCK_INPUT_BUFFER)InputBuffer)->RequestedOplockLevel,
OPLOCK_LEVEL_CACHE_HANDLE)))
{
BOOLEAN DeletePending;
DeletePending = 0 != FileNode->DeletePending;
MemoryBarrier();
if (DeletePending)
{
Result = STATUS_DELETE_PENDING;
goto unlock_exit;
}
}
/*
* This IRP will be completed by the FSRTL package and therefore
* we will have no chance to do our normal IRP completion processing.