xref: /titanic_41/usr/src/cmd/fm/schemes/zfs/scheme.c (revision d89fccd8788afe1e920f842edd883fe192a1b8fe)
1 /*
2  * CDDL HEADER START
3  *
4  * The contents of this file are subject to the terms of the
5  * Common Development and Distribution License (the "License").
6  * You may not use this file except in compliance with the License.
7  *
8  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9  * or http://www.opensolaris.org/os/licensing.
10  * See the License for the specific language governing permissions
11  * and limitations under the License.
12  *
13  * When distributing Covered Code, include this CDDL HEADER in each
14  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15  * If applicable, add the following below this CDDL HEADER, with the
16  * fields enclosed by brackets "[]" replaced with your own identifying
17  * information: Portions Copyright [yyyy] [name of copyright owner]
18  *
19  * CDDL HEADER END
20  */
21 /*
22  * Copyright 2006 Sun Microsystems, Inc.  All rights reserved.
23  * Use is subject to license terms.
24  */
25 
26 #pragma ident	"%Z%%M%	%I%	%E% SMI"
27 
28 #include <fm/fmd_fmri.h>
29 #include <strings.h>
30 #include <libzfs.h>
31 
32 typedef struct cbdata {
33 	uint64_t	cb_guid;
34 	zpool_handle_t	*cb_pool;
35 } cbdata_t;
36 
37 static int
38 find_pool(zpool_handle_t *zhp, void *data)
39 {
40 	cbdata_t *cbp = data;
41 
42 	if (zpool_get_guid(zhp) == cbp->cb_guid) {
43 		cbp->cb_pool = zhp;
44 		return (1);
45 	}
46 
47 	zpool_close(zhp);
48 
49 	return (0);
50 }
51 
52 ssize_t
53 fmd_fmri_nvl2str(nvlist_t *nvl, char *buf, size_t buflen)
54 {
55 	uint64_t pool_guid, vdev_guid;
56 	cbdata_t cb;
57 	ssize_t len;
58 	const char *name;
59 	char guidbuf[64];
60 
61 	(void) nvlist_lookup_uint64(nvl, FM_FMRI_ZFS_POOL, &pool_guid);
62 
63 	/*
64 	 * Attempt to convert the pool guid to a name.
65 	 */
66 	cb.cb_guid = pool_guid;
67 	cb.cb_pool = NULL;
68 
69 	if (zpool_iter(find_pool, &cb) == 1) {
70 		name = zpool_get_name(cb.cb_pool);
71 	} else {
72 		(void) snprintf(guidbuf, sizeof (guidbuf), "%llx", pool_guid);
73 		name = guidbuf;
74 	}
75 
76 	if (nvlist_lookup_uint64(nvl, FM_FMRI_ZFS_VDEV, &vdev_guid) == 0)
77 		len = snprintf(buf, buflen, "%s://pool=%s/vdev=%llx",
78 		    FM_FMRI_SCHEME_ZFS, name, vdev_guid);
79 	else
80 		len = snprintf(buf, buflen, "%s://pool=%s",
81 		    FM_FMRI_SCHEME_ZFS, name);
82 
83 	if (cb.cb_pool)
84 		zpool_close(cb.cb_pool);
85 
86 	return (len);
87 }
88 
89 static nvlist_t *
90 find_vdev_iter(nvlist_t *nv, uint64_t search)
91 {
92 	uint_t c, children;
93 	nvlist_t **child;
94 	uint64_t guid;
95 	nvlist_t *ret;
96 
97 	(void) nvlist_lookup_uint64(nv, ZPOOL_CONFIG_GUID, &guid);
98 
99 	if (search == guid)
100 		return (nv);
101 
102 	if (nvlist_lookup_nvlist_array(nv, ZPOOL_CONFIG_CHILDREN,
103 	    &child, &children) != 0)
104 		return (0);
105 
106 	for (c = 0; c < children; c++)
107 		if ((ret = find_vdev_iter(child[c], search)) != 0)
108 			return (ret);
109 
110 	return (NULL);
111 }
112 
113 static nvlist_t *
114 find_vdev(zpool_handle_t *zhp, uint64_t guid)
115 {
116 	nvlist_t *config;
117 	nvlist_t *nvroot;
118 
119 	config = zpool_get_config(zhp, NULL);
120 
121 	(void) nvlist_lookup_nvlist(config, ZPOOL_CONFIG_VDEV_TREE, &nvroot);
122 
123 	return (find_vdev_iter(nvroot, guid));
124 }
125 
126 int
127 fmd_fmri_present(nvlist_t *nvl)
128 {
129 	uint64_t pool_guid, vdev_guid;
130 	cbdata_t cb;
131 	int ret;
132 
133 	(void) nvlist_lookup_uint64(nvl, FM_FMRI_ZFS_POOL, &pool_guid);
134 
135 	cb.cb_guid = pool_guid;
136 	cb.cb_pool = NULL;
137 
138 	if (zpool_iter(find_pool, &cb) != 1)
139 		return (0);
140 
141 	if (nvlist_lookup_uint64(nvl, FM_FMRI_ZFS_VDEV, &vdev_guid) != 0) {
142 		zpool_close(cb.cb_pool);
143 		return (1);
144 	}
145 
146 	ret = (find_vdev(cb.cb_pool, vdev_guid) != NULL);
147 
148 	zpool_close(cb.cb_pool);
149 
150 	return (ret);
151 }
152 
153 int
154 fmd_fmri_unusable(nvlist_t *nvl)
155 {
156 	uint64_t pool_guid, vdev_guid;
157 	cbdata_t cb;
158 	nvlist_t *vd;
159 	int ret;
160 
161 	(void) nvlist_lookup_uint64(nvl, FM_FMRI_ZFS_POOL, &pool_guid);
162 
163 	cb.cb_guid = pool_guid;
164 	cb.cb_pool = NULL;
165 
166 	if (zpool_iter(find_pool, &cb) != 1)
167 		return (1);
168 
169 	if (nvlist_lookup_uint64(nvl, FM_FMRI_ZFS_VDEV, &vdev_guid) != 0) {
170 		ret = (zpool_get_state(cb.cb_pool) == POOL_STATE_UNAVAIL);
171 		zpool_close(cb.cb_pool);
172 		return (ret);
173 	}
174 
175 	vd = find_vdev(cb.cb_pool, vdev_guid);
176 	if (vd == NULL) {
177 		ret = 1;
178 	} else {
179 		vdev_stat_t *vs;
180 		uint_t c;
181 
182 		(void) nvlist_lookup_uint64_array(vd, ZPOOL_CONFIG_STATS,
183 		    (uint64_t **)&vs, &c);
184 
185 		ret = (vs->vs_state < VDEV_STATE_DEGRADED);
186 	}
187 
188 	zpool_close(cb.cb_pool);
189 
190 	return (ret);
191 }
192