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/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License (the "License").
* You may not use this file except in compliance with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or http://www.opensolaris.org/os/licensing.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/*
* Copyright (c) 2006, 2010, Oracle and/or its affiliates. All rights reserved.
*/
#include <syslog.h>
#include <errno.h>
#include <unistd.h>
#include <stropts.h>
#include "mp_utils.h"
#include <libdevinfo.h>
/*
* Checks whether there is online path or not.
* - no path found returns -1.
* - online/standby path found returns 1.
* - path exists but no online/standby path found returns 0.
*/
static int checkAvailablePath(di_node_t node)
{
di_path_t path;
di_path_state_t state;
if ((path = di_path_client_next_path(node, DI_PATH_NIL))
== DI_PATH_NIL) {
log(LOG_INFO, "checkAvailalblePath()",
" - No path found");
return (-1);
}
do {
/* ignore the path that is neither online nor standby. */
if (((state = di_path_state(path)) == DI_PATH_STATE_ONLINE) ||
(state == DI_PATH_STATE_STANDBY)) {
return (1);
}
} while ((path = di_path_client_next_path(node, path)) != DI_PATH_NIL);
/* return 0 for the case that there is no online path to the node. */
log(LOG_INFO, "checkAvailalblePath()", " - No online path found");
return (0);
}
static int getOidList(di_node_t root_node, MP_OID_LIST *pOidList)
{
int numNodes = 0, state;
int instNum;
int majorNum;
MP_UINT64 osn;
di_node_t sv_node = DI_NODE_NIL;
di_node_t sv_child_node = DI_NODE_NIL;
int haveList = (NULL != pOidList);
log(LOG_INFO, "getOidList()", " - enter");
sv_node = di_drv_first_node("scsi_vhci", root_node);
if (DI_NODE_NIL == sv_node) {
log(LOG_INFO, "getOidList()",
" - di_drv_first_node() failed");
return (-1);
}
sv_child_node = di_child_node(sv_node);
while (DI_NODE_NIL != sv_child_node) {
/* skip the node which is offline, down or detached. */
state = di_state(sv_child_node);
if ((state & DI_DEVICE_DOWN) ||
(state & DI_DEVICE_OFFLINE)) {
sv_child_node = di_sibling_node(sv_child_node);
continue;
}
/*
* skip if the node doesn't have any path avaialble.
* If any path is found from the DINFOCACHE snaphost
* that means the driver keeps track of the path regadless
* of state.
*/
if (checkAvailablePath(sv_child_node) == -1) {
sv_child_node = di_sibling_node(sv_child_node);
continue;
}
if (haveList && (numNodes < pOidList->oidCount)) {
instNum = di_instance(sv_child_node);
majorNum = di_driver_major(sv_child_node);
log(LOG_INFO, "getOidList()",
"instNum = %d", instNum);
log(LOG_INFO, "getOidList()",
"majorNum = %d", majorNum);
osn = 0;
osn = MP_STORE_INST_TO_ID(instNum, osn);
osn = MP_STORE_MAJOR_TO_ID(majorNum, osn);
pOidList->oids[numNodes].objectType =
MP_OBJECT_TYPE_MULTIPATH_LU;
pOidList->oids[numNodes].ownerId =
g_pluginOwnerID;
pOidList->oids[numNodes].objectSequenceNumber =
osn;
}
++numNodes;
sv_child_node = di_sibling_node(sv_child_node);
}
log(LOG_INFO,
"getOidList()",
" - numNodes: %d",
numNodes);
log(LOG_INFO, "getOidList()", " - exit");
return (numNodes);
}
MP_STATUS
MP_GetMultipathLusPlugin(MP_OID_LIST **ppList)
{
di_node_t root_node = DI_NODE_NIL;
MP_OID_LIST *pOidList = NULL;
int numNodes = 0;
int i = 0;
log(LOG_INFO, "MP_GetMultipathLusPlugin()", " - enter");
root_node = di_init("/", DINFOCACHE);
if (DI_NODE_NIL == root_node) {
log(LOG_INFO, "MP_GetMultipathLusPlugin()",
" - di_init() failed");
return (MP_STATUS_FAILED);
}
numNodes = getOidList(root_node, NULL);
if (numNodes < 0) {
log(LOG_INFO,
"MP_GetMultipathLusPlugin()",
" - unable to get OID list.");
log(LOG_INFO, "MP_GetMultipathLusPlugin()",
" - error exit");
di_fini(root_node);
return (MP_STATUS_FAILED);
}
if (0 == numNodes) {
pOidList = createOidList(1);
if (NULL == pOidList) {
log(LOG_INFO,
"MP_GetMultipathLusPlugin()",
" - unable to create OID list.");
di_fini(root_node);
return (MP_STATUS_INSUFFICIENT_MEMORY);
}
pOidList->oids[0].objectType =
MP_OBJECT_TYPE_MULTIPATH_LU;
pOidList->oids[0].ownerId =
g_pluginOwnerID;
*ppList = pOidList;
log(LOG_INFO, "MP_GetMultipathLusPlugin()",
" - returning empty list.");
di_fini(root_node);
return (MP_STATUS_SUCCESS);
}
*ppList = createOidList(numNodes);
if (NULL == *ppList) {
log(LOG_INFO, "MP_GetMultipathLusPlugin()",
"no memory for *ppList");
log(LOG_INFO, "MP_GetMultipathLusPlugin()",
" - error exit");
return (MP_STATUS_INSUFFICIENT_MEMORY);
}
(*ppList)->oidCount = numNodes;
numNodes = getOidList(root_node, *ppList);
for (i = 0; i < (*ppList)->oidCount; i++) {
log(LOG_INFO, "MP_GetMultipathLusPlugin()",
"(*ppList)->oids[%d].objectType = %d",
i, (*ppList)->oids[i].objectType);
log(LOG_INFO, "MP_GetMultipathLusPlugin()",
"(*ppList)->oids[%d].ownerId = %d",
i, (*ppList)->oids[i].ownerId);
log(LOG_INFO, "MP_GetMultipathLusPlugin()",
"(*ppList)->oids[%d].objectSequenceNumber = %llx",
i, (*ppList)->oids[i].objectSequenceNumber);
}
di_fini(root_node);
log(LOG_INFO, "MP_GetMultipathLusPlugin()", " - exit");
return (MP_STATUS_SUCCESS);
}
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