LIBMPAPI(3LIB) Interface Libraries LIBMPAPI(3LIB)

libMPAPI, libmpapi - Common Multipath Management library

cc [ flag... ] file... -lMPAPI [ library... ]
#include <mpapi.h>
#include <mpapi-sun.h>

The functions in this library allow a management application to administer the multipath devices and associated resources through standard interfaces, independent of a vendor-unique multipathing solution.

The shared object libMPAPI.so.1 provides the public interfaces defined below. See Intro(3) for additional information on shared object interfaces.

MP_AssignLogicalUnitToTPG


MP_CancelOverridePath


MP_CompareOIDs


MP_DeregisterForObjectPropertyChanges


MP_DeregisterForObjectVisibilityChanges


MP_DeregisterPlugin


MP_DisableAutoFailback


MP_DisableAutoProbing


MP_DisablePath


MP_EnableAutoFailback


MP_EnableAutoProbing


MP_EnablePath


MP_FreeOidList


MP_GetAssociatedPathOidList


MP_GetAssociatedPluginOid


MP_GetAssociatedTPGOidList


MP_GetDeviceProductOidList


MP_GetDeviceProductProperties


MP_GetInitiatorPortOidList


MP_GetInitiatorPortProperties


MP_GetLibraryProperties


MP_GetMPLogicalUnitProperties


MP_GetMPLuOidListFromTPG


MP_GetMultipathLus


MP_GetObjectType


MP_GetPathLogicalUnitProperties


MP_GetPluginOidList


MP_GetPluginProperties


MP_GetProprietaryLoadBalanceOidList


MP_GetProprietaryLoadBalanceProperties


MP_GetTargetPortGroupProperties


MP_GetTargetPortOidList


MP_GetTargetPortProperties


MP_RegisterForObjectPropertyChanges


MP_RegisterForObjectVisibilityChanges


MP_RegisterPlugin


MP_SetFailbackPollingRate


MP_SetLogicalUnitLoadBalanceType


MP_SetOverridePath


MP_SetPathWeight


MP_SetPluginLoadBalanceType


MP_SetProbingPollingRate


MP_SetProprietaryProperties


MP_SetTPGAccess


Sun_MP_SendScsiCmd

Client applications link with the Common Library (using -lMPAPI) to access the interfaces. The Common Library dynamically loads an individual vendor-provided plugin library that is available through MP_RegisterPlugin(3MPAPI) on the host system.

Using libMPAPI involves the following steps:

1.
Optionally calling MP_GetLibraryProperties() to retrieve the properties of the Common Library.
2.
Calling MP_GetPluginOidList() to retrieve the registered plugin libraries.
3.
Optionally calling MP_GetPluginProperties() to retrieve the properties of the plugin library.
4.
Retrieve discovery information and property information on multipath devices and associated resources by calling the following:
MP_GetAssociatedPathOidList()
MP_GetAssociatedTPGOidList()
MP_GetDeviceProductOidList()
MP_GetDeviceProductProperties()
MP_GetInitiatorPortOidList()
MP_GetInitiatorPortProperties()
MP_GetMPLuOidListFromTPG()
MP_GetMPLogicalUnitProperties()
MP_GetMultipathLus()
MP_GetPathLogicalUnitProperties()
MP_GetProprietaryLoadBalanceOidList()
MP_GetProprietaryLoadBalanceProperties()
MP_GetTargetPortGroupProperties()
MP_GetTargetPortOidList()
MP_GetTargetPortProperties()
5.
Register and deregister for property and visibility changes on multipath devices and associated resources by calling:
MP_RegisterForObjectPropertyChanges()
MP_RegisterForObjectVisibilityChanges()
MP_DeregisterForObjectPropertyChanges()
MP_DeregisterForObjectVisibilityChanges()
6.
Perform administrative operations on multipath devices and associated resources by calling:
MP_AssignLogicalUnitToTPG()
MP_CancelOverridePath()
MP_DisableAutoFailback()
MP_DisableAutoProbing()
MP_DisablePath()
MP_EnableAutoFailback()
MP_EnableAutoProbing()
MP_EnablePath()
MP_SetLogicalUnitLoadBalanceType()
MP_SetOverridePath()
MP_SetPathWeight()
MP_SetPluginLoadBalanceType()
MP_SetFailbackPollingRate()
MP_SetProbingPollingRate()
MP_SetProprietaryProperties()
MP_SetTPGAccess()
Sun_MP_SendScsiCmd()

Errors are generally returned from the underlying VSL and can include any of the following values:

MP_STATUS_SUCCESS

This status value is returned when the requested operation is successfully carried out.

MP_STATUS_INVALID_PARAMETER

This status value is returned when parameters passed to an API are detected to be invalid or inappropriate for a particular API parameter. If the parameter is an object ID, this status indicates that the object type subfield is defined in this specification, but is not appropriate for this API.

MP_STATUS_UNKNOWN_FN

This status value is returned when a client function passed into the API is not a previously registered or known function.

MP_STATUS_FAILED

This status value is returned when the requested operation could not be carried out.

MP_STATUS_INSUFFICIENT_MEMORY

This status value is returned when the API could [not] allocate the memory required to complete the requested operation.

MP_STATUS_INVALID_OBJECT_TYPE

This status value is returned when an object ID includes a type subfield that is not defined in this specification.

MP_STATUS_OBJECT_NOT_FOUND

This status value is returned when the object associated with the ID specified in the API could not be located, or has been deleted. Note that an invalid object type is covered by MP_STATUS_INVALID_OBJECT_TYPE so this status is limited to an invalid object owner identifier or sequence number.

MP_STATUS_UNSUPPORTED

This status value is returned when the implementation does not support the requested function.

MP_STATUS_FN_REPLACED

This status value is returned when a client function passed into the API replaces a previously registered function.

MP_STATUS_ACCESS_STATE_INVALID

This status value is returned when a device processing MP_SetTPGAccess returns a status indicating that the caller is attempting to establish an illegal combination of access states.

MP_STATUS_PATH_NONOPERATIONAL

This status is returned when communication cannot be established with the path selected by the caller.

MP_STATUS_TRY_AGAIN

This status is returned when the plugin or driver is unable to complete the request, but might be able to complete it later.

MP_STATUS_NOT_PERMITTED

The operation is not permitted in the current configuration, but might be permitted in other configurations.

/usr/lib/libMPAPI.so

shared object

/usr/lib/64/libMPAPI.so

64-bit shared object

See attributes(7) for descriptions of the following attributes:

ATTRIBUTE TYPE ATTRIBUTE VALUE
Interface Stability Committed
MT-Level Safe
Standard ANSI INCITS 412 Multipath Management API (except for Sun_MP_SendScsiCmd)

Intro(3), MP_RegisterPlugin(3MPAPI), attributes(7)

Multipath Management API Version 1.0

June 13, 2021 OmniOS