man/man3mpapi/MP_SetTPGAccess.3mpapi

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 MP_SETTPGACCESS 3MPAPI "Feb 15, 2006"
 NAME
MP_SetTPGAccess - set a target port group access state
 SYNOPSIS

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

MP_STATUS MP_SetTPGAccess(MP_OID luOid, MP_UINT32 count,
 MP_TPG_STATE_PAIR *pTpgStateList);


 PARAMETERS
luOid

An object ID that has type MP_MULTIPATH_LOGICAL_UNIT.


count

The number of valid items in the pTpgStateList.


pTpgStateList

A pointer to an array of data structure MP_TPG_STATE_PAIR. This array
must contain the same number of elements as count.


 DESCRIPTION

The MP_SetTPGAccess() function sets the access state for a list of target
port groups. This allows a client to force a failover or failback to a desired
set of target port groups. This is only valid for devices that support explicit
access state manipulation (i.e., the field explicitFailover of data
structure MP_TARGET_PORT_GROUP_PROPERTIES must be true).

This API provides the information needed to set up a SCSI SET TARGET PORT
GROUPS command.

The plugin should not implement this API by directly calling the SCSI SET
TARGET PORT GROUPS command. The plugin should use the MP drivers API (for
example, ioctl) if available.

There are two reasons why this API is restricted to devices supporting explicit
failover commands. Without an explicit command, the behavior of failback tends
to be device-specific.

When the caller is finished using the list it must free the memory used by the
list by calling MP_FreeOidList.
 RETURN VALUES
MP_STATUS_ACCESS_STATE_INVALID

The target device returns a status indicating the caller is attempting to
establish an illegal combination of access states.


MP_STATUS_FAILED

The underlying interface failed the command for some reason other than
MP_STATUS_ACCESS_STATE_INVALID.


MP_STATUS_INVALID_OBJECT_TYPE

The luOid 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_OBJECT_NOT_FOUND

The luOid owner ID or object sequence number is invalid.


MP_STATUS_INVALID_PARAMETER

The pTpgStateList is null, or when one of the TPGs referenced in the list
is not associated with the specified MP logical unit, or the luOid has a
type subfield other than MP_OBJECT_TYPE_MULTIPATH_LU.


MP_STATUS_SUCCESS

The operation is successful.


MP_STATUS_UNSUPPORTED

The API is not supported.


 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