/*
* 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) 2004, 2012, Oracle and/or its affiliates. All rights reserved.
*/
#include <fcntl.h>
#include <libdevinfo.h>
#include <stdlib.h>
#include <sys/sunddi.h>
#include <sys/types.h>
#include "libdiskmgt.h"
#include "disks_private.h"
static int add_path_state(descriptor_t *dp, nvlist_t *attrs);
static int add_wwn(descriptor_t *dp, nvlist_t *attrs);
static descriptor_t **get_assoc_drives(descriptor_t *desc, int *errp);
static descriptor_t **get_assoc_controllers(descriptor_t *desc, int *errp);
static char *path_state_name(di_path_state_t st);
descriptor_t **
path_get_assoc_descriptors(descriptor_t *desc, dm_desc_type_t type, int *errp)
{
switch (type) {
case DM_DRIVE:
return (get_assoc_drives(desc, errp));
case DM_CONTROLLER:
return (get_assoc_controllers(desc, errp));
}
*errp = EINVAL;
return (NULL);
}
nvlist_t *
path_get_attributes(descriptor_t *dp, int *errp)
{
path_t *pp;
nvlist_t *attrs = NULL;
pp = dp->p.path;
if (nvlist_alloc(&attrs, NVATTRS, 0) != 0) {
*errp = ENOMEM;
return (NULL);
}
if (nvlist_add_string(attrs, DM_CTYPE, pp->ctype) != 0) {
nvlist_free(attrs);
*errp = ENOMEM;
return (NULL);
}
/*
* We add the path state and wwn attributes only for descriptors that
* we got via their association to a specific drive (since these
* attributes are drive specific).
*/
if (dp->name != NULL) {
if (add_path_state(dp, attrs) != 0) {
nvlist_free(attrs);
*errp = ENOMEM;
return (NULL);
}
if (add_wwn(dp, attrs) != 0) {
nvlist_free(attrs);
*errp = ENOMEM;
return (NULL);
}
}
*errp = 0;
return (attrs);
}
descriptor_t *
path_get_descriptor_by_name(char *name, int *errp)
{
descriptor_t **paths;
int i;
descriptor_t *path = NULL;
paths = cache_get_descriptors(DM_PATH, errp);
if (*errp != 0) {
return (NULL);
}
for (i = 0; paths[i]; i++) {
if (libdiskmgt_str_eq(name, paths[i]->p.path->name)) {
path = paths[i];
} else {
/* clean up the unused descriptors */
cache_free_descriptor(paths[i]);
}
}
free(paths);
if (path == NULL) {
*errp = ENODEV;
}
return (path);
}
/* ARGSUSED */
descriptor_t **
path_get_descriptors(int filter[], int *errp)
{
return (cache_get_descriptors(DM_PATH, errp));
}
char *
path_get_name(descriptor_t *desc)
{
return (desc->p.path->name);
}
/* ARGSUSED */
nvlist_t *
path_get_stats(descriptor_t *dp, int stat_type, int *errp)
{
/* There are no stat types defined for paths */
*errp = EINVAL;
return (NULL);
}
int
path_make_descriptors()
{
controller_t *cp;
int error = 0;
int locked;
cache_rlock(&locked);
cp = cache_get_controllerlist();
while ((error == 0) && (cp != NULL)) {
if (cp->paths != NULL) {
int i;
for (i = 0; cp->paths[i]; i++) {
cache_load_desc(DM_PATH, cp->paths[i], NULL,
NULL, &error);
if (error != 0)
break;
}
}
cp = cp->next;
}
cache_unlock(&locked);
return (error);
}
/*
* This is called when we have a name in the descriptor name field. That
* only will be the case when the descriptor was created by getting the
* association from a drive to the path. Since we filled in the name with
* the drive device id in that case, we can use the device id to look up the
* drive-path state.
*/
static int
add_path_state(descriptor_t *dp, nvlist_t *attrs)
{
ddi_devid_t devid;
path_t *pp;
int i;
int status = 0;
if (devid_str_decode(dp->name, &devid, NULL) != 0) {
return (0);
}
/* find the index of the correct drive assoc. */
pp = dp->p.path;
for (i = 0; pp->disks[i] && pp->states[i] != -1; i++) {
if (pp->disks[i]->devid != NULL &&
devid_compare(pp->disks[i]->devid, devid) == 0) {
/* add the corresponding state */
if (nvlist_add_string(attrs, DM_PATH_STATE,
path_state_name(pp->states[i])) != 0) {
status = ENOMEM;
}
break;
}
}
devid_free(devid);
return (status);
}
/*
* This is called when we have a name in the descriptor name field. That
* only will be the case when the descriptor was created by getting the
* association from a drive to the path. Since we filled in the name with
* the drive device id in that case, we can use the device id to look up the
* drive wwn.
*/
static int
add_wwn(descriptor_t *dp, nvlist_t *attrs)
{
ddi_devid_t devid;
path_t *pp;
int i;
int status = 0;
if (devid_str_decode(dp->name, &devid, NULL) != 0) {
return (0);
}
/* find the index of the correct drive assoc. */
pp = dp->p.path;
for (i = 0; pp->disks[i] && pp->states[i] != -1; i++) {
if (pp->disks[i]->devid != NULL &&
devid_compare(pp->disks[i]->devid, devid) == 0) {
/* add the corresponding state */
if (nvlist_add_string(attrs, DM_WWN, pp->wwns[i]) != 0) {
status = ENOMEM;
}
break;
}
}
devid_free(devid);
return (status);
}
static descriptor_t **
get_assoc_controllers(descriptor_t *desc, int *errp)
{
path_t *pp;
descriptor_t **controllers;
int i;
pp = desc->p.path;
/* a path can have just one controller */
controllers = (descriptor_t **)calloc(2, sizeof (descriptor_t *));
if (controllers == NULL) {
*errp = ENOMEM;
return (NULL);
}
i = 0;
if (pp->controller != NULL) {
controllers[i++] = cache_get_desc(DM_CONTROLLER,
pp->controller, NULL, NULL, errp);
if (*errp != 0) {
cache_free_descriptors(controllers);
return (NULL);
}
}
controllers[i] = NULL;
*errp = 0;
return (controllers);
}
static descriptor_t **
get_assoc_drives(descriptor_t *desc, int *errp)
{
path_t *pp;
descriptor_t **drives;
int cnt;
int i;
pp = desc->p.path;
/* Count how many we have. */
for (cnt = 0; pp->disks[cnt]; cnt++);
/* make the snapshot */
drives = (descriptor_t **)calloc(cnt + 1, sizeof (descriptor_t *));
if (drives == NULL) {
*errp = ENOMEM;
return (NULL);
}
for (i = 0; pp->disks[i]; i++) {
drives[i] = cache_get_desc(DM_DRIVE, pp->disks[i], NULL, NULL,
errp);
if (*errp != 0) {
cache_free_descriptors(drives);
return (NULL);
}
}
drives[i] = NULL;
*errp = 0;
return (drives);
}
static char *
path_state_name(di_path_state_t st)
{
switch (st) {
case DI_PATH_STATE_ONLINE:
return ("online");
case DI_PATH_STATE_STANDBY:
return ("standby");
case DI_PATH_STATE_OFFLINE:
return ("offline");
case DI_PATH_STATE_FAULT:
return ("faulted");
}
return ("unknown");
}