/*
 * CDDL HEADER START
 *
 * The contents of this file are subject to the terms of the
 * Common Development and Distribution License, Version 1.0 only
 * (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 2004 Sun Microsystems, Inc.  All rights reserved.
 * Use is subject to license terms.
 */

#include <fcntl.h>
#include <libdevinfo.h>
#include <stdio.h>
#include <stdlib.h>
#include <sys/dkio.h>
#include <sys/sunddi.h>
#include <sys/types.h>
#include <unistd.h>

#include "libdiskmgt.h"
#include "disks_private.h"

static int              get_status(disk_t *diskp, int fd, nvlist_t *attrs);

descriptor_t **
alias_get_assoc_descriptors(descriptor_t *desc, dm_desc_type_t type,
    int *errp)
{
        switch (type) {
        case DM_DRIVE:
            return (drive_get_assocs(desc, errp));
        }

        *errp = EINVAL;
        return (NULL);
}

nvlist_t *
alias_get_attributes(descriptor_t *dp, int *errp)
{
        alias_t         *ap;
        nvlist_t        *attrs = NULL;

        /* Find the alias for this descriptor */

        *errp = ENODEV;
        for (ap = dp->p.disk->aliases; ap != NULL; ap = ap->next) {
            if (libdiskmgt_str_eq(dp->name, ap->alias)) {
                /* we found the alias for this descriptor */

                if (nvlist_alloc(&attrs, NVATTRS, 0) != 0) {
                    *errp = ENOMEM;
                    return (NULL);
                }

                if (ap->target >= 0) {
                    if (nvlist_add_uint32(attrs, DM_LUN, ap->lun) != 0) {
                        nvlist_free(attrs);
                        *errp = ENOMEM;
                        return (NULL);
                    }

                    if (nvlist_add_uint32(attrs, DM_TARGET, ap->target) != 0) {
                        nvlist_free(attrs);
                        *errp = ENOMEM;
                        return (NULL);
                    }
                }

                if (ap->wwn != NULL) {
                    if (nvlist_add_string(attrs, DM_WWN, ap->wwn) != 0) {
                        nvlist_free(attrs);
                        *errp = ENOMEM;
                        return (NULL);
                    }
                }

                if (ap->devpaths != NULL) {
                    /* get the status for this alias */
                    int         fd;

                    fd = open(ap->devpaths->devpath, O_RDONLY|O_NDELAY);

                    if ((*errp = get_status(dp->p.disk, fd, attrs)) != 0) {
                        nvlist_free(attrs);
                        attrs = NULL;
                    }

                    if (fd >= 0) {
                        (void) close(fd);
                    }
                }

                *errp = 0;
                break;
            }
        }

        return (attrs);
}

descriptor_t *
alias_get_descriptor_by_name(char *name, int *errp)
{
        descriptor_t    **aliases;
        int             i;
        descriptor_t    *alias = NULL;

        aliases = cache_get_descriptors(DM_ALIAS, errp);
        if (*errp != 0) {
            return (NULL);
        }

        for (i = 0; aliases[i]; i++) {
            if (libdiskmgt_str_eq(name, aliases[i]->name)) {
                alias = aliases[i];
            } else {
                /* clean up the unused descriptors */
                cache_free_descriptor(aliases[i]);
            }
        }
        free(aliases);

        if (alias == NULL) {
            *errp = ENODEV;
        }

        return (alias);
}

/* ARGSUSED */
descriptor_t **
alias_get_descriptors(int filter[], int *errp)
{
        return (cache_get_descriptors(DM_ALIAS, errp));
}

char *
alias_get_name(descriptor_t *desc)
{
        return (desc->name);
}

/* ARGSUSED */
nvlist_t *
alias_get_stats(descriptor_t *dp, int stat_type, int *errp)
{
        /* There are no stat types defined for aliases */
        *errp = EINVAL;
        return (NULL);
}

int
alias_make_descriptors()
{
        int             error;
        disk_t          *dp;

        dp = cache_get_disklist();
        while (dp != NULL) {
            alias_t *ap;

            ap = dp->aliases;
            while (ap != NULL) {
                if (ap->alias != NULL) {
                    cache_load_desc(DM_ALIAS, dp, ap->alias, NULL, &error);
                    if (error != 0) {
                        return (error);
                    }
                }
                ap = ap->next;
            }
            dp = dp->next;
        }

        return (0);
}

static int
get_status(disk_t *diskp, int fd, nvlist_t *attrs)
{
        struct dk_minfo minfo;

        /* Make sure media is inserted and spun up. */
        if (fd >= 0 && media_read_info(fd, &minfo)) {

            if (nvlist_add_uint32(attrs, DM_STATUS, DM_DISK_UP) != 0) {
                return (ENOMEM);
            }

        } else {
            /* Not ready, so either no media or dead. */

            if (diskp->removable) {
                /* This is a removable drive with no media. */
                if (nvlist_add_uint32(attrs, DM_STATUS, DM_DISK_UP) != 0) {
                    return (ENOMEM);
                }
            } else {
                /* not removable, so must be dead */
                if (nvlist_add_uint32(attrs, DM_STATUS, DM_DISK_DOWN) != 0) {
                    return (ENOMEM);
                }
            }
        }

        return (0);
}