/*

 * 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

 */

/*

 * Use is subject to license terms.

 */

#pragma ident	"%Z%%M%	%I%	%E% SMI"

#include <fm/fmd_fmri.h>

#include <strings.h>

#include <libzfs.h>

typedef struct cbdata {

	uint64_t	cb_guid;

	zpool_handle_t	*cb_pool;

} cbdata_t;

libzfs_handle_t *g_zfs;

static int

find_pool(zpool_handle_t *zhp, void *data)

{

	cbdata_t *cbp = data;

	if (zpool_get_prop_int(zhp, ZPOOL_PROP_GUID, NULL) == cbp->cb_guid) {

		cbp->cb_pool = zhp;

		return (1);

	}

	zpool_close(zhp);

	return (0);

}

ssize_t

fmd_fmri_nvl2str(nvlist_t *nvl, char *buf, size_t buflen)

{

	uint64_t pool_guid, vdev_guid;

	cbdata_t cb;

	ssize_t len;

	const char *name;

	char guidbuf[64];

	(void) nvlist_lookup_uint64(nvl, FM_FMRI_ZFS_POOL, &pool_guid);

	/*

	 * Attempt to convert the pool guid to a name.

	 */

	cb.cb_guid = pool_guid;

	cb.cb_pool = NULL;

	if (zpool_iter(g_zfs, find_pool, &cb) == 1) {

		name = zpool_get_name(cb.cb_pool);

	} else {

		(void) snprintf(guidbuf, sizeof (guidbuf), "%llx", pool_guid);

		name = guidbuf;

	}

	if (nvlist_lookup_uint64(nvl, FM_FMRI_ZFS_VDEV, &vdev_guid) == 0)

		len = snprintf(buf, buflen, "%s://pool=%s/vdev=%llx",

		    FM_FMRI_SCHEME_ZFS, name, vdev_guid);

	else

		len = snprintf(buf, buflen, "%s://pool=%s",

		    FM_FMRI_SCHEME_ZFS, name);

	if (cb.cb_pool)

		zpool_close(cb.cb_pool);

	return (len);

}

static nvlist_t *

find_vdev_iter(nvlist_t *nv, uint64_t search)

{

	uint_t c, children;

	nvlist_t **child;

	uint64_t guid;

	nvlist_t *ret;

	(void) nvlist_lookup_uint64(nv, ZPOOL_CONFIG_GUID, &guid);

	if (search == guid)

		return (nv);

	if (nvlist_lookup_nvlist_array(nv, ZPOOL_CONFIG_CHILDREN,

	    &child, &children) != 0)

	for (c = 0; c < children; c++)

		if ((ret = find_vdev_iter(child[c], search)) != 0)

			return (ret);

	return (NULL);

}

static nvlist_t *

find_vdev(zpool_handle_t *zhp, uint64_t guid)

{

	config = zpool_get_config(zhp, NULL);

	(void) nvlist_lookup_nvlist(config, ZPOOL_CONFIG_VDEV_TREE, &nvroot);

	return (find_vdev_iter(nvroot, guid));

}

int

fmd_fmri_present(nvlist_t *nvl)

{

	uint64_t pool_guid, vdev_guid;

	cbdata_t cb;

	int ret;

	(void) nvlist_lookup_uint64(nvl, FM_FMRI_ZFS_POOL, &pool_guid);

	cb.cb_guid = pool_guid;

	cb.cb_pool = NULL;

	if (zpool_iter(g_zfs, find_pool, &cb) != 1)

		return (0);

	if (nvlist_lookup_uint64(nvl, FM_FMRI_ZFS_VDEV, &vdev_guid) != 0) {

		zpool_close(cb.cb_pool);

		return (1);

	}

	ret = (find_vdev(cb.cb_pool, vdev_guid) != NULL);

	zpool_close(cb.cb_pool);

	return (ret);

}

int

fmd_fmri_unusable(nvlist_t *nvl)

{

	uint64_t pool_guid, vdev_guid;

	cbdata_t cb;

	nvlist_t *vd;

	int ret;

	(void) nvlist_lookup_uint64(nvl, FM_FMRI_ZFS_POOL, &pool_guid);

	cb.cb_guid = pool_guid;

	cb.cb_pool = NULL;

	if (zpool_iter(g_zfs, find_pool, &cb) != 1)

		return (1);

	if (nvlist_lookup_uint64(nvl, FM_FMRI_ZFS_VDEV, &vdev_guid) != 0) {

		ret = (zpool_get_state(cb.cb_pool) == POOL_STATE_UNAVAIL);

		zpool_close(cb.cb_pool);

		return (ret);

	}

	vd = find_vdev(cb.cb_pool, vdev_guid);

	if (vd == NULL) {

		ret = 1;

	} else {

		vdev_stat_t *vs;

		uint_t c;

		(void) nvlist_lookup_uint64_array(vd, ZPOOL_CONFIG_STATS,

		    (uint64_t **)&vs, &c);

		ret = (vs->vs_state < VDEV_STATE_DEGRADED);

	}

	zpool_close(cb.cb_pool);

	return (ret);

}

int

fmd_fmri_init(void)

{

	g_zfs = libzfs_init();

	if (g_zfs == NULL)

		return (-1);

	else

		return (0);

}

void

fmd_fmri_fini(void)

{

	if (g_zfs)

		libzfs_fini(g_zfs);

}