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 https://opensource.org/licenses/CDDL-1.0.
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 /*
23 * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
24 * Copyright (c) 2011 by Delphix. All rights reserved.
25 * Copyright (c) 2013 Martin Matuska <mm@FreeBSD.org>. All rights reserved.
26 */
27
28
29 #include <sys/zfs_context.h>
30 #include <sys/fm/fs/zfs.h>
31 #include <sys/spa_impl.h>
32 #include <sys/zio.h>
33 #include <sys/zio_checksum.h>
34 #include <sys/dmu.h>
35 #include <sys/dmu_tx.h>
36 #include <sys/zap.h>
37 #include <sys/zil.h>
38 #include <sys/ddt.h>
39 #include <sys/vdev_impl.h>
40 #include <sys/vdev_os.h>
41 #include <sys/vdev_removal.h>
42 #include <sys/vdev_indirect_mapping.h>
43 #include <sys/vdev_indirect_births.h>
44 #include <sys/metaslab.h>
45 #include <sys/metaslab_impl.h>
46 #include <sys/uberblock_impl.h>
47 #include <sys/txg.h>
48 #include <sys/avl.h>
49 #include <sys/bpobj.h>
50 #include <sys/dmu_traverse.h>
51 #include <sys/dmu_objset.h>
52 #include <sys/unique.h>
53 #include <sys/dsl_pool.h>
54 #include <sys/dsl_dataset.h>
55 #include <sys/dsl_dir.h>
56 #include <sys/dsl_prop.h>
57 #include <sys/dsl_synctask.h>
58 #include <sys/fs/zfs.h>
59 #include <sys/arc.h>
60 #include <sys/callb.h>
61 #include <sys/zfs_ioctl.h>
62 #include <sys/dsl_scan.h>
63 #include <sys/dmu_send.h>
64 #include <sys/dsl_destroy.h>
65 #include <sys/dsl_userhold.h>
66 #include <sys/zfeature.h>
67 #include <sys/zvol.h>
68 #include <sys/abd.h>
69 #include <sys/callb.h>
70 #include <sys/zone.h>
71
72 #include "zfs_prop.h"
73 #include "zfs_comutil.h"
74
75 static nvlist_t *
spa_generate_rootconf(const char * name)76 spa_generate_rootconf(const char *name)
77 {
78 nvlist_t **configs, **tops;
79 nvlist_t *config;
80 nvlist_t *best_cfg, *nvtop, *nvroot;
81 uint64_t *holes;
82 uint64_t best_txg;
83 uint64_t nchildren;
84 uint64_t pgid;
85 uint64_t count;
86 uint64_t i;
87 uint_t nholes;
88
89 if (vdev_geom_read_pool_label(name, &configs, &count) != 0)
90 return (NULL);
91
92 ASSERT3U(count, !=, 0);
93 best_txg = 0;
94 for (i = 0; i < count; i++) {
95 uint64_t txg;
96
97 if (configs[i] == NULL)
98 continue;
99 txg = fnvlist_lookup_uint64(configs[i], ZPOOL_CONFIG_POOL_TXG);
100 if (txg > best_txg) {
101 best_txg = txg;
102 best_cfg = configs[i];
103 }
104 }
105
106 nchildren = 1;
107 nvlist_lookup_uint64(best_cfg, ZPOOL_CONFIG_VDEV_CHILDREN, &nchildren);
108 holes = NULL;
109 nvlist_lookup_uint64_array(best_cfg, ZPOOL_CONFIG_HOLE_ARRAY,
110 &holes, &nholes);
111
112 tops = kmem_zalloc(nchildren * sizeof (void *), KM_SLEEP);
113 for (i = 0; i < nchildren; i++) {
114 if (i >= count)
115 break;
116 if (configs[i] == NULL)
117 continue;
118 nvtop = fnvlist_lookup_nvlist(configs[i],
119 ZPOOL_CONFIG_VDEV_TREE);
120 tops[i] = fnvlist_dup(nvtop);
121 }
122 for (i = 0; holes != NULL && i < nholes; i++) {
123 if (i >= nchildren)
124 continue;
125 if (tops[holes[i]] != NULL)
126 continue;
127 tops[holes[i]] = fnvlist_alloc();
128 fnvlist_add_string(tops[holes[i]], ZPOOL_CONFIG_TYPE,
129 VDEV_TYPE_HOLE);
130 fnvlist_add_uint64(tops[holes[i]], ZPOOL_CONFIG_ID, holes[i]);
131 fnvlist_add_uint64(tops[holes[i]], ZPOOL_CONFIG_GUID, 0);
132 }
133 for (i = 0; i < nchildren; i++) {
134 if (tops[i] != NULL)
135 continue;
136 tops[i] = fnvlist_alloc();
137 fnvlist_add_string(tops[i], ZPOOL_CONFIG_TYPE,
138 VDEV_TYPE_MISSING);
139 fnvlist_add_uint64(tops[i], ZPOOL_CONFIG_ID, i);
140 fnvlist_add_uint64(tops[i], ZPOOL_CONFIG_GUID, 0);
141 }
142
143 /*
144 * Create pool config based on the best vdev config.
145 */
146 config = fnvlist_dup(best_cfg);
147
148 /*
149 * Put this pool's top-level vdevs into a root vdev.
150 */
151 pgid = fnvlist_lookup_uint64(config, ZPOOL_CONFIG_POOL_GUID);
152 nvroot = fnvlist_alloc();
153 fnvlist_add_string(nvroot, ZPOOL_CONFIG_TYPE, VDEV_TYPE_ROOT);
154 fnvlist_add_uint64(nvroot, ZPOOL_CONFIG_ID, 0ULL);
155 fnvlist_add_uint64(nvroot, ZPOOL_CONFIG_GUID, pgid);
156 fnvlist_add_nvlist_array(nvroot, ZPOOL_CONFIG_CHILDREN,
157 (const nvlist_t * const *)tops, nchildren);
158
159 /*
160 * Replace the existing vdev_tree with the new root vdev in
161 * this pool's configuration (remove the old, add the new).
162 */
163 fnvlist_add_nvlist(config, ZPOOL_CONFIG_VDEV_TREE, nvroot);
164
165 /*
166 * Drop vdev config elements that should not be present at pool level.
167 */
168 fnvlist_remove(config, ZPOOL_CONFIG_GUID);
169 fnvlist_remove(config, ZPOOL_CONFIG_TOP_GUID);
170
171 for (i = 0; i < count; i++)
172 fnvlist_free(configs[i]);
173 kmem_free(configs, count * sizeof (void *));
174 for (i = 0; i < nchildren; i++)
175 fnvlist_free(tops[i]);
176 kmem_free(tops, nchildren * sizeof (void *));
177 fnvlist_free(nvroot);
178 return (config);
179 }
180
181 int
spa_import_rootpool(const char * name,bool checkpointrewind)182 spa_import_rootpool(const char *name, bool checkpointrewind)
183 {
184 spa_t *spa;
185 vdev_t *rvd;
186 nvlist_t *config, *nvtop;
187 const char *pname;
188 int error;
189
190 /*
191 * Read the label from the boot device and generate a configuration.
192 */
193 config = spa_generate_rootconf(name);
194
195 mutex_enter(&spa_namespace_lock);
196 if (config != NULL) {
197 pname = fnvlist_lookup_string(config, ZPOOL_CONFIG_POOL_NAME);
198 VERIFY0(strcmp(name, pname));
199
200 if ((spa = spa_lookup(pname)) != NULL) {
201 /*
202 * The pool could already be imported,
203 * e.g., after reboot -r.
204 */
205 if (spa->spa_state == POOL_STATE_ACTIVE) {
206 mutex_exit(&spa_namespace_lock);
207 fnvlist_free(config);
208 return (0);
209 }
210
211 /*
212 * Remove the existing root pool from the namespace so
213 * that we can replace it with the correct config
214 * we just read in.
215 */
216 spa_remove(spa);
217 }
218 spa = spa_add(pname, config, NULL);
219
220 /*
221 * Set spa_ubsync.ub_version as it can be used in vdev_alloc()
222 * via spa_version().
223 */
224 if (nvlist_lookup_uint64(config, ZPOOL_CONFIG_VERSION,
225 &spa->spa_ubsync.ub_version) != 0)
226 spa->spa_ubsync.ub_version = SPA_VERSION_INITIAL;
227 } else if ((spa = spa_lookup(name)) == NULL) {
228 mutex_exit(&spa_namespace_lock);
229 fnvlist_free(config);
230 cmn_err(CE_NOTE, "Cannot find the pool label for '%s'",
231 name);
232 return (EIO);
233 } else {
234 config = fnvlist_dup(spa->spa_config);
235 }
236 spa->spa_is_root = B_TRUE;
237 spa->spa_import_flags = ZFS_IMPORT_VERBATIM;
238 if (checkpointrewind) {
239 spa->spa_import_flags |= ZFS_IMPORT_CHECKPOINT;
240 }
241
242 /*
243 * Build up a vdev tree based on the boot device's label config.
244 */
245 nvtop = fnvlist_lookup_nvlist(config, ZPOOL_CONFIG_VDEV_TREE);
246 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER);
247 error = spa_config_parse(spa, &rvd, nvtop, NULL, 0,
248 VDEV_ALLOC_ROOTPOOL);
249 spa_config_exit(spa, SCL_ALL, FTAG);
250 if (error) {
251 mutex_exit(&spa_namespace_lock);
252 fnvlist_free(config);
253 cmn_err(CE_NOTE, "Can not parse the config for pool '%s'",
254 name);
255 return (error);
256 }
257
258 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER);
259 vdev_free(rvd);
260 spa_config_exit(spa, SCL_ALL, FTAG);
261 mutex_exit(&spa_namespace_lock);
262
263 fnvlist_free(config);
264 return (0);
265 }
266
267 const char *
spa_history_zone(void)268 spa_history_zone(void)
269 {
270 return ("freebsd");
271 }
272
273 void
spa_import_os(spa_t * spa)274 spa_import_os(spa_t *spa)
275 {
276 (void) spa;
277 }
278
279 void
spa_export_os(spa_t * spa)280 spa_export_os(spa_t *spa)
281 {
282 (void) spa;
283 }
284
285 void
spa_activate_os(spa_t * spa)286 spa_activate_os(spa_t *spa)
287 {
288 (void) spa;
289 }
290
291 void
spa_deactivate_os(spa_t * spa)292 spa_deactivate_os(spa_t *spa)
293 {
294 (void) spa;
295 }
296