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sys: FSP_FSCTL_QUERY_WINFSP

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The FSP_FSCTL_QUERY_WINFSP code provides a simple method to determine if
the file system backing a file is a WinFsp file system. To use issue a

    DeviceIoControl(Handle, FSP_FSCTL_QUERY_WINFSP, 0, 0, 0, 0, &Bytes, 0)

If the return value is TRUE this is a WinFsp file system.
This commit is contained in:
Bill Zissimopoulos
2020-05-24 21:04:28 -07:00
parent fc18b70a00
commit 2ffb8a1c97
3 changed files with 50 additions and 0 deletions
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4
inc/winfsp/fsctl.h
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@ -71,6 +71,10 @@ extern const __declspec(selectany) GUID FspFsvrtDeviceClassGuid =
#define FSP_FSCTL_TRANSACT_INTERNAL \
CTL_CODE(FILE_DEVICE_FILE_SYSTEM, 0x800 + 'I', METHOD_NEITHER, FILE_ANY_ACCESS)
/* fsvol device codes */
#define FSP_FSCTL_QUERY_WINFSP \
CTL_CODE(FILE_DEVICE_FILE_SYSTEM, 0x800 + '?', METHOD_BUFFERED, FILE_ANY_ACCESS)
#define FSP_FSCTL_VOLUME_PARAMS_PREFIX "\\VolumeParams="
#define FSP_FSCTL_VOLUME_NAME_SIZE (64 * sizeof(WCHAR))