StorPortEtwLogByteStream function (storport.h)
StorPortEtwLogByteStream logs an Event Tracing for Windows (ETW) event with a general purpose byte stream parameter to the specified channel.
Syntax
ULONG StorPortEtwLogByteStream(
[in] PVOID HwDeviceExtension,
[in, optional] PSTOR_ADDRESS Address,
[in] STORPORT_ETW_EVENT_CHANNEL EventChannel,
[in] ULONG EventId,
[in] PWSTR EventDescription,
[in] ULONGLONG EventKeywords,
[in] STORPORT_ETW_LEVEL EventLevel,
[in] STORPORT_ETW_EVENT_OPCODE EventOpcode,
[in] USHORT DataLength,
[in] PUCHAR Data
);
Parameters
[in] HwDeviceExtension
A pointer to the miniport's device extension.
[in, optional] Address
The storage unit device address. This parameter is NULL for adapter devices.
[in] EventChannel
A STORPORT_ETW_EVENT_CHANNEL value that identifies the ETW channel in which to log the event.
[in] EventId
A miniport-defined event ID that uniquely identifies the event.
[in] EventDescription
A short string describing the event. EventDescription is required and must be <= STORPORT_ETW_MAX_DESCRIPTION_LENGTH characters, not including the NULL terminator.
[in] EventKeywords
Keyword flags for event categorization. Set to 0 if no keyword is desired. The keywords are a bitwise OR combination of the following.
| Value | Meaning |
|---|---|
| STORPORT_ETW_EVENT_KEYWORD_IO | The event is related to device IO operations. |
| STORPORT_ETW_EVENT_KEYWORD_PERFORMANCE | The event is performance related. |
| STORPORT_ETW_EVENT_KEYWORD_POWER | The event is related to device power. |
| STORPORT_ETW_EVENT_KEYWORD_ENUMERATION | The event is related to device enumeration. |
[in] EventLevel
The event level. This value can indicate the importance or severity of the event. This is one of the following values.
| Value | Meaning |
|---|---|
| StorportEtwLevelLogAlways | Log the event unconditionally. The event is logged regardless of any filters set. |
| StorportEtwLevelCritical | Critical level event. |
| StorportEtwLevelError | Error level event. |
| StorportEtwLevelWarning | Warning level event. |
| StorportEtwLevelInformational | Informational event. |
| StorportEtwLevelVerbose | Verbose event information provided. |
[in] EventOpcode
The operational nature of the event. This is one of the following values.
| Value | Meaning |
|---|---|
| StorportEtwEventOpcodeInfo | General informational event. |
| StorportEtwEventOpcodeStart | Device or unit was starting. |
| StorportEtwEventOpcodeStop | Device or unit was stopping. The event corresponds to the last unpaired start event. |
| StorportEtwEventOpcodeDC_Start | A data collection starting event. These are rundown event types. |
| StorportEtwEventOpcodeDC_Stop | A data collection stopping event. These are rundown event types. |
| StorportEtwEventOpcodeExtension | An extension event. |
| StorportEtwEventOpcodeReply | A reply event. |
| StorportEtwEventOpcodeResume | Device or unit was resuming after suspend. |
| StorportEtwEventOpcodeSuspend | Device or unit is suspended pending completion of another operation. |
| StorportEtwEventOpcodeReceive | Transfer of activity is received from another component. |
[in] DataLength
Length, in bytes, of the byte stream that Data points to, where 1 <= DataLength <= STORPORT_ETW_MAX_BYTE_STREAM_LENGTH.
[in] Data
Pointer to the miniport's custom ETW byte stream.
Return value
StorPortEtwLogByteStream returns one of the following status codes:
| Return code | Description |
|---|---|
| STOR_STATUS_SUCCESS | The event was successfully logged to the specified ETW channel. |
| STOR_STATUS_INVALID_PARAMETER | A parameter is invalid. For example, HwDeviceExtension, EventDescription, or Data are NULL, DataLength is greater than the maximum name length, EventChannel is an invalid value. |
| STOR_STATUS_UNSUCCESSFUL | Returned for other internal reasons. |
Remarks
A miniport can call StorPortEtwLogByteStream to log an ETW event to a specific channel with a general purpose byte stream parameter.
StorPortEtwLogByteStream is useful when a miniport needs to log context beyond that allowed in StorPortEtwEvent2, StorPortEtwEvent4, or StorPortEtwEvent8. For instance, a miniport can log its internal data structure as a byte stream that can then be used for diagnostic purposes when issues get reported.
Requirements
| Requirement | Value |
|---|---|
| Minimum supported server | Windows Server 2022 |
| Header | storport.h |