man/man3mpapi/MP_SetOverridePath.3mpapi

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 MP_SETOVERRIDEPATH 3MPAPI "Feb 15, 2006"
 NAME
MP_SetOverridePath - manually override a logical unit path
 SYNOPSIS

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

MP_STATUS MP_SetOverridePath(MP_OID logicalUnitOid,
 MP_OID pathOid);


 PARAMETERS
logicalUnitOid

The object ID of the multipath logical unit.


pathOid

The object ID of the path logical unit.


 DESCRIPTION

The MP_SetOverridePath() function is used to manually override the path
for a logical unit. The path is exclusively used to access the logical unit
until cleared. Use MP_CancelOverride to clear the override.

This API allows the administrator to disable the dri ver's load balance
algorithm and force all I/O operations to a specific path. The existing path
weight configuration is maintained. If the administrator undoes the override
(by calling MP_CancelOverridePath), the driver starts load balancing
based on the weights of available paths (and target port group access state
for asymmetric devices).

If the multipath logical unit is part of a target with asymmetrical access,
executing this command could cause failover.
 RETURN VALUES
MP_STATUS_INVALID_OBJECT_TYPE

The logicalUnitOid or pathOid does not specify any valid object
type. This is most likely to happen if an uninitialized object ID is passed to
the API.


MP_STATUS_INVALID_PARAMETER

The logicalUnitOid has a type subfield other than
MP_OBJECT_TYPE_MULTIPATH_LU, or if pathOid has an object type other
than MP_OBJECT_TYPE_PATH_LU.


MP_STATUS_OBJECT_NOT_FOUND

The logicalUnitOid, pathOid owner ID, or object sequence number is
invalid.


MP_STATUS_SUCCESS

The operation is successful.


MP_STATUS_UNSUPPORTED

The implementation does not support the API.


MP_STATUS_PATH_NONOPERATIONAL

The driver cannot communicate through selected path


 ATTRIBUTES

See attributes(5) for descriptions of the following attributes:


ATTRIBUTE TYPE ATTRIBUTE VALUE
Interface Stability
Standard: ANSI INCITS 412 Multipath Management API
MT-Level Safe


 SEE ALSO

libMPAPI(3LIB), attributes(5)

Multipath Management API Version 1.0