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sys: notify implementation

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This commit is contained in:
Bill Zissimopoulos
2020-10-08 16:56:31 -07:00
parent 7f360827f6
commit 88edf5723e
3 changed files with 127 additions and 0 deletions
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46
src/dll/fs.c
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@ -432,6 +432,52 @@ FSP_API FSP_FILE_SYSTEM_OPERATION_CONTEXT *FspFileSystemGetOperationContext(VOID
return (FSP_FILE_SYSTEM_OPERATION_CONTEXT *)TlsGetValue(FspFileSystemTlsKey);
}
FSP_API NTSTATUS FspFileSystemNotifyBegin(FSP_FILE_SYSTEM *FileSystem, ULONG Timeout)
{
static const ULONG Delays[] =
{
10/*ms*/,
10/*ms*/,
50/*ms*/,
50/*ms*/,
100/*ms*/,
100/*ms*/,
300/*ms*/,
};
ULONG Total = 0, Delay;
NTSTATUS Result;
for (ULONG i = 0, n = sizeof(Delays) / sizeof(Delays[0]);; i++)
{
Result = FspFsctlNotify(FileSystem->VolumeHandle, 0, 0);
if (STATUS_CANT_WAIT != Result)
return Result;
Delay = n > i ? Delays[i] : Delays[n - 1];
if (INFINITE == Timeout)
Sleep(Delay);
else
{
if (Total >= Timeout)
break;
if (Total + Delay > Timeout)
Delay = Timeout - Total;
Total += Delay;
Sleep(Delay);
}
}
return Result;
}
FSP_API NTSTATUS FspFileSystemNotifyEnd(FSP_FILE_SYSTEM *FileSystem)
{
FSP_FSCTL_NOTIFY_INFO NotifyInfo;
memset(&NotifyInfo, 0, sizeof NotifyInfo);
return FspFsctlNotify(FileSystem->VolumeHandle, &NotifyInfo, sizeof NotifyInfo.Size);
}
FSP_API NTSTATUS FspFileSystemNotify(FSP_FILE_SYSTEM *FileSystem,
FSP_FSCTL_NOTIFY_INFO *NotifyInfo, SIZE_T Size)
{