OpenSolaris_b135/lib/mpapi/libmpscsi_vhci/common/MP_GetMPLuOidListFromTPG.c
/*
* 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 2008 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
#include <errno.h>
#include <unistd.h>
#include <stropts.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <libdevinfo.h>
#include <sys/stat.h>
#include "mp_utils.h"
/*
* The plugin library will call MP_CMD ioctl with
* MP_GET_TARGET_PORT_LIST_FOR_TPG subcommand.
* For each target port, the plugin will get the target port name property.
*
* A scsi_vhci device with pathinfo containing matching target port name
* may potentially be associated with the given TPG.
* The plugin library will check the TPG list for qualifying scsi_vhci
* devices and find a matching TPG id.
*
* An rfe was filed against MDI to
* refresh DINFOCACHE snapshot for pathinfo update.
*/
/*
* Returns MP_TRUE if the ID found in the dev info snapshot matches the ID
* provided by the schi_vhci driver.
*/
static int checkTPGList(MP_UINT32 tpgID, int inst_num)
{
int tpg = 0;
int status = MP_FALSE;
MP_OID luOID;
MP_OID_LIST *ppList = NULL;
MP_STATUS mpStatus = MP_STATUS_SUCCESS;
MP_TARGET_PORT_GROUP_PROPERTIES tpgProps;
log(LOG_INFO, "checkTPGList()", " - enter");
luOID.objectSequenceNumber = (MP_UINT64)inst_num;
luOID.objectType = MP_OBJECT_TYPE_MULTIPATH_LU;
luOID.ownerId = g_pluginOwnerID;
mpStatus = getAssociatedTPGOidList(luOID, &ppList);
if (MP_STATUS_SUCCESS != mpStatus) {
log(LOG_INFO, "checkTPGList()",
" - getAssociatedTPGOidList() failed: %d",
mpStatus);
return (MP_FALSE);
}
for (tpg = 0; tpg < ppList->oidCount; tpg++) {
mpStatus =
getTargetPortGroupProperties(ppList->oids[tpg],
&tpgProps);
if (MP_STATUS_SUCCESS != mpStatus) {
log(LOG_INFO, "checkTPGList()",
" - getTargetPortGroupProperties()"
" failed: %d",
mpStatus);
return (MP_FALSE);
}
if (tpgProps.tpgID == tpgID) {
status = MP_TRUE;
log(LOG_INFO,
"checkTPGList()",
" - found a match");
break;
}
}
free(ppList);
log(LOG_INFO, "checkTPGList()", " - exit");
return (status);
}
/*
* Returns the number of matches found. If pOidList is not NULL, then
* populate it. A return values of -1 indicates and error, zerom menas
* no match is found.
*/
static int getOidList(di_node_t root_node, int tpgID,
MP_OID_LIST *tpList, MP_OID_LIST *pOidList)
{
di_node_t sv_node = DI_NODE_NIL;
di_node_t child_node = DI_NODE_NIL;
di_path_t path = DI_PATH_NIL;
int numNodes = 0;
int tp = 0;
int ioctlStatus = 0;
int match = 0;
int status = -1;
int sv_child_inst = 0;
int hasTpgMatch = MP_FALSE;
struct stat buffer;
char *pathName = NULL;
char *minorName = "c";
char fullName[512];
char *portName = NULL;
mp_iocdata_t mp_ioctl;
mp_target_port_prop_t tpInfo;
MP_UINT64 tpOSN = 0;
int haveList = (NULL != pOidList);
log(LOG_INFO, "getOidList()", " - enter");
/* Look through the list of target ports for a portName that matches */
for (tp = 0; tp < tpList->oidCount; tp++) {
tpOSN = tpList->oids[tp].objectSequenceNumber;
log(LOG_INFO, "getOidList()",
"tpOSN = %llx",
tpOSN);
(void) memset(&mp_ioctl, 0, sizeof (mp_iocdata_t));
(void) memset(&tpInfo, 0, sizeof (mp_target_port_prop_t));
mp_ioctl.mp_cmd = MP_GET_TARGET_PORT_PROP;
mp_ioctl.mp_ibuf = (caddr_t)&tpOSN;
mp_ioctl.mp_ilen = sizeof (tpOSN);
mp_ioctl.mp_obuf = (caddr_t)&tpInfo;
mp_ioctl.mp_olen = sizeof (mp_target_port_prop_t);
mp_ioctl.mp_xfer = MP_XFER_READ;
log(LOG_INFO, "getOidList()",
"mp_ioctl.mp_cmd (MP_GET_TARGET_PORT_PROP) : %d",
mp_ioctl.mp_cmd);
ioctlStatus = ioctl(g_scsi_vhci_fd, MP_CMD, &mp_ioctl);
log(LOG_INFO, "getOidList()",
" IOCTL call returned: %d", ioctlStatus);
if (ioctlStatus < 0) {
ioctlStatus = errno;
}
if (ioctlStatus != 0) {
log(LOG_INFO, "getOidList()",
"IOCTL call failed. IOCTL error is: %d",
ioctlStatus);
log(LOG_INFO, "getOidList()",
"IOCTL call failed. IOCTL error is: %s",
strerror(ioctlStatus));
log(LOG_INFO, "getOidList()",
"IOCTL call failed. mp_ioctl.mp_errno: %x",
mp_ioctl.mp_errno);
log(LOG_INFO, "getOidList()",
" - error exit");
return (-1);
}
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);
}
child_node = di_child_node(sv_node);
while (DI_NODE_NIL != child_node) {
path = di_path_next(child_node, path);
match = 0;
while (DI_PATH_NIL != path) {
(void) di_path_prop_lookup_strings(path,
"target-port",
&portName);
if (NULL != portName) {
if (0 == strncmp(portName,
tpInfo.portName,
strlen(tpInfo.portName))) {
match = 1;
break;
}
}
path = di_path_next(child_node, path);
}
if (match) {
log(LOG_INFO, "getOidList()",
" - got a match");
pathName = di_devfs_path(child_node);
(void) snprintf(fullName, 511, "/devices%s:%s",
pathName, minorName);
di_devfs_path_free(pathName);
status = stat(fullName, &buffer);
if (status < 0) {
log(LOG_INFO,
"getOidList()",
" - stat() call failed: %d",
status);
log(LOG_INFO,
"getOidList()",
" - errno: [%d].", errno);
log(LOG_INFO,
"getOidList()",
" - strerror(errno): [%s].",
strerror(errno));
log(LOG_INFO,
"getOidList()",
" - error exit.");
return (-1);
}
sv_child_inst = di_instance(child_node);
/*
* OK, found an portName that matches, let's
* to see if the IDs match.
*/
hasTpgMatch =
checkTPGList(tpgID,
sv_child_inst);
if (MP_TRUE != hasTpgMatch) {
child_node =
di_sibling_node(child_node);
continue;
}
if (haveList &&
(numNodes < pOidList->oidCount)) {
pOidList->oids[numNodes].
objectSequenceNumber =
sv_child_inst;
pOidList->oids[numNodes].objectType =
MP_OBJECT_TYPE_MULTIPATH_LU;
pOidList->oids[numNodes].ownerId =
g_pluginOwnerID;
}
++numNodes;
}
child_node = di_sibling_node(child_node);
}
}
log(LOG_INFO,
"getOidList()",
" - numNodes: %d",
numNodes);
log(LOG_INFO, "getOidList()", " - exit");
return (numNodes);
}
/*
* Called by the common layer to request a list of multipath logical units
* associated with a given target port group.
*/
MP_STATUS
MP_GetMPLuOidListFromTPG(MP_OID oid, MP_OID_LIST **ppList)
{
di_node_t root_node = DI_NODE_NIL;
int i = 0;
int numNodes = 0;
MP_STATUS mpStatus = MP_STATUS_SUCCESS;
MP_UINT32 sourceTpgID = 0;
MP_OID_LIST *pOidList = NULL;
MP_OID_LIST *tpList = NULL;
MP_TARGET_PORT_GROUP_PROPERTIES sourceTpgProps;
log(LOG_INFO, "MP_GetMPLuOidListFromTPG()", " - enter");
log(LOG_INFO, "MP_GetMPLuOidListFromTPG()",
"oid.objectSequenceNumber = %llx",
oid.objectSequenceNumber);
mpStatus = getTargetPortGroupProperties(oid, &sourceTpgProps);
if (MP_STATUS_SUCCESS != mpStatus) {
log(LOG_INFO, "MP_GetMPLuOidListFromTPG()",
" - getTargetPortGroupProperties() failed: %d",
mpStatus);
return (mpStatus);
}
/* The TPG ID we will use as a serch key */
sourceTpgID = sourceTpgProps.tpgID;
log(LOG_INFO, "MP_GetMPLuOidListFromTPG()",
"sourceTpgID = %d",
sourceTpgID);
/* Get a list of target ports for the TPG */
mpStatus = getTargetPortOidList(oid, &tpList);
if (MP_STATUS_SUCCESS != mpStatus) {
log(LOG_INFO, "getOidList()",
" - getTargetPortOidList() failed: %d",
mpStatus);
return (mpStatus);
}
/* Take a snapshot */
root_node = di_init("/", DINFOCACHE);
if (DI_NODE_NIL == root_node) {
log(LOG_INFO, "MP_GetMPLuOidListFromTPG()",
" - di_init() failed");
free(tpList);
return (MP_STATUS_FAILED);
}
/* search for the number of multipath logical units that match */
numNodes = getOidList(root_node, sourceTpgID, tpList, NULL);
if (numNodes < 0) {
log(LOG_INFO,
"MP_GetMPLuOidListFromTPG()",
" - unable to get OID list.");
log(LOG_INFO, "MP_GetMPLuOidListFromTPG()",
" - error exit");
free(tpList);
di_fini(root_node);
return (MP_STATUS_FAILED);
}
if (0 == numNodes) {
pOidList = createOidList(1);
if (NULL == pOidList) {
log(LOG_INFO,
"MP_GetMPLuOidListFromTPG()",
" - unable to create OID list.");
free(tpList);
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_GetMPLuOidListFromTPG()",
" - returning empty list.");
free(tpList);
return (MP_STATUS_SUCCESS);
}
*ppList = createOidList(numNodes);
if (NULL == *ppList) {
log(LOG_INFO, "MP_GetMPLuOidListFromTPG()",
"no memory for *ppList");
log(LOG_INFO, "MP_GetMPLuOidListFromTPG()",
" - error exit");
free(tpList);
return (MP_STATUS_INSUFFICIENT_MEMORY);
}
/* now populate the list */
(*ppList)->oidCount = numNodes;
numNodes = getOidList(root_node, sourceTpgID, tpList, *ppList);
for (i = 0; i < (*ppList)->oidCount; i++) {
log(LOG_INFO, "MP_GetMPLuOidListFromTPG()",
"(*ppList)->oids[%d].objectType = %d",
i, (*ppList)->oids[i].objectType);
log(LOG_INFO, "MP_GetMPLuOidListFromTPG()",
"(*ppList)->oids[%d].ownerId = %d",
i, (*ppList)->oids[i].ownerId);
log(LOG_INFO, "MP_GetMPLuOidListFromTPG()",
"(*ppList)->oids[%d].objectSequenceNumber = %llx",
i, (*ppList)->oids[i].objectSequenceNumber);
}
free(tpList);
di_fini(root_node);
log(LOG_INFO, "MP_GetMPLuOidListFromTPG()", " - exit");
return (MP_STATUS_SUCCESS);
}