1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
|
/*
* 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 https://opensource.org/licenses/CDDL-1.0.
* 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) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
* Copyright (c) 2011 by Delphix. All rights reserved.
* Copyright (c) 2013 Martin Matuska <mm@FreeBSD.org>. All rights reserved.
*/
#include <sys/zfs_context.h>
#include <sys/fm/fs/zfs.h>
#include <sys/spa_impl.h>
#include <sys/zio.h>
#include <sys/zio_checksum.h>
#include <sys/dmu.h>
#include <sys/dmu_tx.h>
#include <sys/zap.h>
#include <sys/zil.h>
#include <sys/ddt.h>
#include <sys/vdev_impl.h>
#include <sys/vdev_os.h>
#include <sys/vdev_removal.h>
#include <sys/vdev_indirect_mapping.h>
#include <sys/vdev_indirect_births.h>
#include <sys/metaslab.h>
#include <sys/metaslab_impl.h>
#include <sys/uberblock_impl.h>
#include <sys/txg.h>
#include <sys/avl.h>
#include <sys/bpobj.h>
#include <sys/dmu_traverse.h>
#include <sys/dmu_objset.h>
#include <sys/unique.h>
#include <sys/dsl_pool.h>
#include <sys/dsl_dataset.h>
#include <sys/dsl_dir.h>
#include <sys/dsl_prop.h>
#include <sys/dsl_synctask.h>
#include <sys/fs/zfs.h>
#include <sys/arc.h>
#include <sys/callb.h>
#include <sys/spa_boot.h>
#include <sys/zfs_ioctl.h>
#include <sys/dsl_scan.h>
#include <sys/dmu_send.h>
#include <sys/dsl_destroy.h>
#include <sys/dsl_userhold.h>
#include <sys/zfeature.h>
#include <sys/zvol.h>
#include <sys/abd.h>
#include <sys/callb.h>
#include <sys/zone.h>
#include "zfs_prop.h"
#include "zfs_comutil.h"
static nvlist_t *
spa_generate_rootconf(const char *name)
{
nvlist_t **configs, **tops;
nvlist_t *config;
nvlist_t *best_cfg, *nvtop, *nvroot;
uint64_t *holes;
uint64_t best_txg;
uint64_t nchildren;
uint64_t pgid;
uint64_t count;
uint64_t i;
uint_t nholes;
if (vdev_geom_read_pool_label(name, &configs, &count) != 0)
return (NULL);
ASSERT3U(count, !=, 0);
best_txg = 0;
for (i = 0; i < count; i++) {
uint64_t txg;
txg = fnvlist_lookup_uint64(configs[i], ZPOOL_CONFIG_POOL_TXG);
if (txg > best_txg) {
best_txg = txg;
best_cfg = configs[i];
}
}
nchildren = 1;
nvlist_lookup_uint64(best_cfg, ZPOOL_CONFIG_VDEV_CHILDREN, &nchildren);
holes = NULL;
nvlist_lookup_uint64_array(best_cfg, ZPOOL_CONFIG_HOLE_ARRAY,
&holes, &nholes);
tops = kmem_zalloc(nchildren * sizeof (void *), KM_SLEEP);
for (i = 0; i < nchildren; i++) {
if (i >= count)
break;
if (configs[i] == NULL)
continue;
nvtop = fnvlist_lookup_nvlist(configs[i],
ZPOOL_CONFIG_VDEV_TREE);
tops[i] = fnvlist_dup(nvtop);
}
for (i = 0; holes != NULL && i < nholes; i++) {
if (i >= nchildren)
continue;
if (tops[holes[i]] != NULL)
continue;
tops[holes[i]] = fnvlist_alloc();
fnvlist_add_string(tops[holes[i]], ZPOOL_CONFIG_TYPE,
VDEV_TYPE_HOLE);
fnvlist_add_uint64(tops[holes[i]], ZPOOL_CONFIG_ID, holes[i]);
fnvlist_add_uint64(tops[holes[i]], ZPOOL_CONFIG_GUID, 0);
}
for (i = 0; i < nchildren; i++) {
if (tops[i] != NULL)
continue;
tops[i] = fnvlist_alloc();
fnvlist_add_string(tops[i], ZPOOL_CONFIG_TYPE,
VDEV_TYPE_MISSING);
fnvlist_add_uint64(tops[i], ZPOOL_CONFIG_ID, i);
fnvlist_add_uint64(tops[i], ZPOOL_CONFIG_GUID, 0);
}
/*
* Create pool config based on the best vdev config.
*/
config = fnvlist_dup(best_cfg);
/*
* Put this pool's top-level vdevs into a root vdev.
*/
pgid = fnvlist_lookup_uint64(config, ZPOOL_CONFIG_POOL_GUID);
nvroot = fnvlist_alloc();
fnvlist_add_string(nvroot, ZPOOL_CONFIG_TYPE, VDEV_TYPE_ROOT);
fnvlist_add_uint64(nvroot, ZPOOL_CONFIG_ID, 0ULL);
fnvlist_add_uint64(nvroot, ZPOOL_CONFIG_GUID, pgid);
fnvlist_add_nvlist_array(nvroot, ZPOOL_CONFIG_CHILDREN,
(const nvlist_t * const *)tops, nchildren);
/*
* Replace the existing vdev_tree with the new root vdev in
* this pool's configuration (remove the old, add the new).
*/
fnvlist_add_nvlist(config, ZPOOL_CONFIG_VDEV_TREE, nvroot);
/*
* Drop vdev config elements that should not be present at pool level.
*/
fnvlist_remove(config, ZPOOL_CONFIG_GUID);
fnvlist_remove(config, ZPOOL_CONFIG_TOP_GUID);
for (i = 0; i < count; i++)
fnvlist_free(configs[i]);
kmem_free(configs, count * sizeof (void *));
for (i = 0; i < nchildren; i++)
fnvlist_free(tops[i]);
kmem_free(tops, nchildren * sizeof (void *));
fnvlist_free(nvroot);
return (config);
}
int
spa_import_rootpool(const char *name, bool checkpointrewind)
{
spa_t *spa;
vdev_t *rvd;
nvlist_t *config, *nvtop;
char *pname;
int error;
/*
* Read the label from the boot device and generate a configuration.
*/
config = spa_generate_rootconf(name);
mutex_enter(&spa_namespace_lock);
if (config != NULL) {
pname = fnvlist_lookup_string(config, ZPOOL_CONFIG_POOL_NAME);
VERIFY0(strcmp(name, pname));
if ((spa = spa_lookup(pname)) != NULL) {
/*
* The pool could already be imported,
* e.g., after reboot -r.
*/
if (spa->spa_state == POOL_STATE_ACTIVE) {
mutex_exit(&spa_namespace_lock);
fnvlist_free(config);
return (0);
}
/*
* Remove the existing root pool from the namespace so
* that we can replace it with the correct config
* we just read in.
*/
spa_remove(spa);
}
spa = spa_add(pname, config, NULL);
/*
* Set spa_ubsync.ub_version as it can be used in vdev_alloc()
* via spa_version().
*/
if (nvlist_lookup_uint64(config, ZPOOL_CONFIG_VERSION,
&spa->spa_ubsync.ub_version) != 0)
spa->spa_ubsync.ub_version = SPA_VERSION_INITIAL;
} else if ((spa = spa_lookup(name)) == NULL) {
mutex_exit(&spa_namespace_lock);
fnvlist_free(config);
cmn_err(CE_NOTE, "Cannot find the pool label for '%s'",
name);
return (EIO);
} else {
config = fnvlist_dup(spa->spa_config);
}
spa->spa_is_root = B_TRUE;
spa->spa_import_flags = ZFS_IMPORT_VERBATIM;
if (checkpointrewind) {
spa->spa_import_flags |= ZFS_IMPORT_CHECKPOINT;
}
/*
* Build up a vdev tree based on the boot device's label config.
*/
nvtop = fnvlist_lookup_nvlist(config, ZPOOL_CONFIG_VDEV_TREE);
spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER);
error = spa_config_parse(spa, &rvd, nvtop, NULL, 0,
VDEV_ALLOC_ROOTPOOL);
spa_config_exit(spa, SCL_ALL, FTAG);
if (error) {
mutex_exit(&spa_namespace_lock);
fnvlist_free(config);
cmn_err(CE_NOTE, "Can not parse the config for pool '%s'",
pname);
return (error);
}
spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER);
vdev_free(rvd);
spa_config_exit(spa, SCL_ALL, FTAG);
mutex_exit(&spa_namespace_lock);
fnvlist_free(config);
return (0);
}
const char *
spa_history_zone(void)
{
return ("freebsd");
}
void
spa_import_os(spa_t *spa)
{
(void) spa;
}
void
spa_export_os(spa_t *spa)
{
(void) spa;
}
void
spa_activate_os(spa_t *spa)
{
(void) spa;
}
void
spa_deactivate_os(spa_t *spa)
{
(void) spa;
}
|
