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 (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
23 */
24
25 #include <sys/zfs_context.h>
26 #include <sys/dmu_objset.h>
27 #include <sys/dmu_traverse.h>
28 #include <sys/dsl_dataset.h>
29 #include <sys/dsl_dir.h>
30 #include <sys/dsl_pool.h>
31 #include <sys/dnode.h>
32 #include <sys/spa.h>
33 #include <sys/zio.h>
34 #include <sys/dmu_impl.h>
35 #include <sys/sa.h>
36 #include <sys/sa_impl.h>
37 #include <sys/callb.h>
38
39 int zfs_pd_blks_max = 100;
40
41 typedef struct prefetch_data {
42 kmutex_t pd_mtx;
43 kcondvar_t pd_cv;
44 int pd_blks_max;
45 int pd_blks_fetched;
46 int pd_flags;
47 boolean_t pd_cancel;
48 boolean_t pd_exited;
49 } prefetch_data_t;
50
51 typedef struct traverse_data {
52 spa_t *td_spa;
53 uint64_t td_objset;
54 blkptr_t *td_rootbp;
55 uint64_t td_min_txg;
56 int td_flags;
57 prefetch_data_t *td_pfd;
58 blkptr_cb_t *td_func;
59 void *td_arg;
60 } traverse_data_t;
61
62 static int traverse_dnode(traverse_data_t *td, const dnode_phys_t *dnp,
63 arc_buf_t *buf, uint64_t objset, uint64_t object);
64
65 static int
66 traverse_zil_block(zilog_t *zilog, blkptr_t *bp, void *arg, uint64_t claim_txg)
67 {
68 traverse_data_t *td = arg;
69 zbookmark_t zb;
70
71 if (bp->blk_birth == 0)
72 return (0);
73
74 if (claim_txg == 0 && bp->blk_birth >= spa_first_txg(td->td_spa))
75 return (0);
111 traverse_zil(traverse_data_t *td, zil_header_t *zh)
112 {
113 uint64_t claim_txg = zh->zh_claim_txg;
114 zilog_t *zilog;
115
116 /*
117 * We only want to visit blocks that have been claimed but not yet
118 * replayed; plus, in read-only mode, blocks that are already stable.
119 */
120 if (claim_txg == 0 && spa_writeable(td->td_spa))
121 return;
122
123 zilog = zil_alloc(spa_get_dsl(td->td_spa)->dp_meta_objset, zh);
124
125 (void) zil_parse(zilog, traverse_zil_block, traverse_zil_record, td,
126 claim_txg);
127
128 zil_free(zilog);
129 }
130
131 static int
132 traverse_visitbp(traverse_data_t *td, const dnode_phys_t *dnp,
133 arc_buf_t *pbuf, blkptr_t *bp, const zbookmark_t *zb)
134 {
135 zbookmark_t czb;
136 int err = 0, lasterr = 0;
137 arc_buf_t *buf = NULL;
138 prefetch_data_t *pd = td->td_pfd;
139 boolean_t hard = td->td_flags & TRAVERSE_HARD;
140
141 if (bp->blk_birth == 0) {
142 err = td->td_func(td->td_spa, NULL, NULL, pbuf, zb, dnp,
143 td->td_arg);
144 return (err);
145 }
146
147 if (bp->blk_birth <= td->td_min_txg)
148 return (0);
149
150 if (pd && !pd->pd_exited &&
151 ((pd->pd_flags & TRAVERSE_PREFETCH_DATA) ||
152 BP_GET_TYPE(bp) == DMU_OT_DNODE || BP_GET_LEVEL(bp) > 0)) {
153 mutex_enter(&pd->pd_mtx);
154 ASSERT(pd->pd_blks_fetched >= 0);
155 while (pd->pd_blks_fetched == 0 && !pd->pd_exited)
156 cv_wait(&pd->pd_cv, &pd->pd_mtx);
157 pd->pd_blks_fetched--;
158 cv_broadcast(&pd->pd_cv);
159 mutex_exit(&pd->pd_mtx);
160 }
161
162 if (td->td_flags & TRAVERSE_PRE) {
163 err = td->td_func(td->td_spa, NULL, bp, pbuf, zb, dnp,
164 td->td_arg);
165 if (err == TRAVERSE_VISIT_NO_CHILDREN)
166 return (0);
167 if (err)
168 return (err);
169 }
170
171 if (BP_GET_LEVEL(bp) > 0) {
172 uint32_t flags = ARC_WAIT;
173 int i;
174 blkptr_t *cbp;
175 int epb = BP_GET_LSIZE(bp) >> SPA_BLKPTRSHIFT;
176
177 err = dsl_read(NULL, td->td_spa, bp, pbuf,
178 arc_getbuf_func, &buf,
179 ZIO_PRIORITY_ASYNC_READ, ZIO_FLAG_CANFAIL, &flags, zb);
180 if (err)
181 return (err);
182
183 /* recursively visitbp() blocks below this */
184 cbp = buf->b_data;
185 for (i = 0; i < epb; i++, cbp++) {
186 SET_BOOKMARK(&czb, zb->zb_objset, zb->zb_object,
187 zb->zb_level - 1,
188 zb->zb_blkid * epb + i);
236 }
237 if (err == 0 && arc_buf_size(buf) >= sizeof (objset_phys_t)) {
238 dnp = &osp->os_userused_dnode;
239 err = traverse_dnode(td, dnp, buf, zb->zb_objset,
240 DMU_USERUSED_OBJECT);
241 }
242 if (err && hard) {
243 lasterr = err;
244 err = 0;
245 }
246 if (err == 0 && arc_buf_size(buf) >= sizeof (objset_phys_t)) {
247 dnp = &osp->os_groupused_dnode;
248 err = traverse_dnode(td, dnp, buf, zb->zb_objset,
249 DMU_GROUPUSED_OBJECT);
250 }
251 }
252
253 if (buf)
254 (void) arc_buf_remove_ref(buf, &buf);
255
256 if (err == 0 && lasterr == 0 && (td->td_flags & TRAVERSE_POST)) {
257 err = td->td_func(td->td_spa, NULL, bp, pbuf, zb, dnp,
258 td->td_arg);
259 }
260
261 return (err != 0 ? err : lasterr);
262 }
263
264 static int
265 traverse_dnode(traverse_data_t *td, const dnode_phys_t *dnp,
266 arc_buf_t *buf, uint64_t objset, uint64_t object)
267 {
268 int j, err = 0, lasterr = 0;
269 zbookmark_t czb;
270 boolean_t hard = (td->td_flags & TRAVERSE_HARD);
271
272 for (j = 0; j < dnp->dn_nblkptr; j++) {
273 SET_BOOKMARK(&czb, objset, object, dnp->dn_nlevels - 1, j);
274 err = traverse_visitbp(td, dnp, buf,
275 (blkptr_t *)&dnp->dn_blkptr[j], &czb);
276 if (err) {
277 if (!hard)
278 break;
279 lasterr = err;
280 }
336
337 td.td_func = traverse_prefetcher;
338 td.td_arg = td_main->td_pfd;
339 td.td_pfd = NULL;
340
341 SET_BOOKMARK(&czb, td.td_objset,
342 ZB_ROOT_OBJECT, ZB_ROOT_LEVEL, ZB_ROOT_BLKID);
343 (void) traverse_visitbp(&td, NULL, NULL, td.td_rootbp, &czb);
344
345 mutex_enter(&td_main->td_pfd->pd_mtx);
346 td_main->td_pfd->pd_exited = B_TRUE;
347 cv_broadcast(&td_main->td_pfd->pd_cv);
348 mutex_exit(&td_main->td_pfd->pd_mtx);
349 }
350
351 /*
352 * NB: dataset must not be changing on-disk (eg, is a snapshot or we are
353 * in syncing context).
354 */
355 static int
356 traverse_impl(spa_t *spa, dsl_dataset_t *ds, blkptr_t *rootbp,
357 uint64_t txg_start, int flags, blkptr_cb_t func, void *arg)
358 {
359 traverse_data_t td;
360 prefetch_data_t pd = { 0 };
361 zbookmark_t czb;
362 int err;
363
364 td.td_spa = spa;
365 td.td_objset = ds ? ds->ds_object : 0;
366 td.td_rootbp = rootbp;
367 td.td_min_txg = txg_start;
368 td.td_func = func;
369 td.td_arg = arg;
370 td.td_pfd = &pd;
371 td.td_flags = flags;
372
373 pd.pd_blks_max = zfs_pd_blks_max;
374 pd.pd_flags = flags;
375 mutex_init(&pd.pd_mtx, NULL, MUTEX_DEFAULT, NULL);
376 cv_init(&pd.pd_cv, NULL, CV_DEFAULT, NULL);
377
378 /* See comment on ZIL traversal in dsl_scan_visitds. */
379 if (ds != NULL && !dsl_dataset_is_snapshot(ds)) {
380 objset_t *os;
381
382 err = dmu_objset_from_ds(ds, &os);
383 if (err)
384 return (err);
385
386 traverse_zil(&td, &os->os_zil_header);
387 }
399 pd.pd_cancel = B_TRUE;
400 cv_broadcast(&pd.pd_cv);
401 while (!pd.pd_exited)
402 cv_wait(&pd.pd_cv, &pd.pd_mtx);
403 mutex_exit(&pd.pd_mtx);
404
405 mutex_destroy(&pd.pd_mtx);
406 cv_destroy(&pd.pd_cv);
407
408 return (err);
409 }
410
411 /*
412 * NB: dataset must not be changing on-disk (eg, is a snapshot or we are
413 * in syncing context).
414 */
415 int
416 traverse_dataset(dsl_dataset_t *ds, uint64_t txg_start, int flags,
417 blkptr_cb_t func, void *arg)
418 {
419 return (traverse_impl(ds->ds_dir->dd_pool->dp_spa, ds,
420 &ds->ds_phys->ds_bp, txg_start, flags, func, arg));
421 }
422
423 /*
424 * NB: pool must not be changing on-disk (eg, from zdb or sync context).
425 */
426 int
427 traverse_pool(spa_t *spa, uint64_t txg_start, int flags,
428 blkptr_cb_t func, void *arg)
429 {
430 int err, lasterr = 0;
431 uint64_t obj;
432 dsl_pool_t *dp = spa_get_dsl(spa);
433 objset_t *mos = dp->dp_meta_objset;
434 boolean_t hard = (flags & TRAVERSE_HARD);
435
436 /* visit the MOS */
437 err = traverse_impl(spa, NULL, spa_get_rootblkptr(spa),
438 txg_start, flags, func, arg);
439 if (err)
440 return (err);
441
442 /* visit each dataset */
443 for (obj = 1; err == 0 || (err != ESRCH && hard);
444 err = dmu_object_next(mos, &obj, FALSE, txg_start)) {
445 dmu_object_info_t doi;
446
447 err = dmu_object_info(mos, obj, &doi);
448 if (err) {
449 if (!hard)
450 return (err);
451 lasterr = err;
452 continue;
453 }
454
455 if (doi.doi_type == DMU_OT_DSL_DATASET) {
456 dsl_dataset_t *ds;
457 uint64_t txg = txg_start;
458
|
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 (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
23 * Copyright (c) 2012 by Delphix. All rights reserved.
24 */
25
26 #include <sys/zfs_context.h>
27 #include <sys/dmu_objset.h>
28 #include <sys/dmu_traverse.h>
29 #include <sys/dsl_dataset.h>
30 #include <sys/dsl_dir.h>
31 #include <sys/dsl_pool.h>
32 #include <sys/dnode.h>
33 #include <sys/spa.h>
34 #include <sys/zio.h>
35 #include <sys/dmu_impl.h>
36 #include <sys/sa.h>
37 #include <sys/sa_impl.h>
38 #include <sys/callb.h>
39
40 int zfs_pd_blks_max = 100;
41
42 typedef struct prefetch_data {
43 kmutex_t pd_mtx;
44 kcondvar_t pd_cv;
45 int pd_blks_max;
46 int pd_blks_fetched;
47 int pd_flags;
48 boolean_t pd_cancel;
49 boolean_t pd_exited;
50 } prefetch_data_t;
51
52 typedef struct traverse_data {
53 spa_t *td_spa;
54 uint64_t td_objset;
55 blkptr_t *td_rootbp;
56 uint64_t td_min_txg;
57 zbookmark_t *td_resume;
58 int td_flags;
59 prefetch_data_t *td_pfd;
60 blkptr_cb_t *td_func;
61 void *td_arg;
62 } traverse_data_t;
63
64 static int traverse_dnode(traverse_data_t *td, const dnode_phys_t *dnp,
65 arc_buf_t *buf, uint64_t objset, uint64_t object);
66
67 static int
68 traverse_zil_block(zilog_t *zilog, blkptr_t *bp, void *arg, uint64_t claim_txg)
69 {
70 traverse_data_t *td = arg;
71 zbookmark_t zb;
72
73 if (bp->blk_birth == 0)
74 return (0);
75
76 if (claim_txg == 0 && bp->blk_birth >= spa_first_txg(td->td_spa))
77 return (0);
113 traverse_zil(traverse_data_t *td, zil_header_t *zh)
114 {
115 uint64_t claim_txg = zh->zh_claim_txg;
116 zilog_t *zilog;
117
118 /*
119 * We only want to visit blocks that have been claimed but not yet
120 * replayed; plus, in read-only mode, blocks that are already stable.
121 */
122 if (claim_txg == 0 && spa_writeable(td->td_spa))
123 return;
124
125 zilog = zil_alloc(spa_get_dsl(td->td_spa)->dp_meta_objset, zh);
126
127 (void) zil_parse(zilog, traverse_zil_block, traverse_zil_record, td,
128 claim_txg);
129
130 zil_free(zilog);
131 }
132
133 typedef enum resume_skip {
134 RESUME_SKIP_ALL,
135 RESUME_SKIP_NONE,
136 RESUME_SKIP_CHILDREN
137 } resume_skip_t;
138
139 /*
140 * Returns RESUME_SKIP_ALL if td indicates that we are resuming a traversal and
141 * the block indicated by zb does not need to be visited at all. Returns
142 * RESUME_SKIP_CHILDREN if we are resuming a post traversal and we reach the
143 * resume point. This indicates that this block should be visited but not its
144 * children (since they must have been visited in a previous traversal).
145 * Otherwise returns RESUME_SKIP_NONE.
146 */
147 static resume_skip_t
148 resume_skip_check(traverse_data_t *td, const dnode_phys_t *dnp,
149 const zbookmark_t *zb)
150 {
151 if (td->td_resume != NULL && !ZB_IS_ZERO(td->td_resume)) {
152 /*
153 * If we already visited this bp & everything below,
154 * don't bother doing it again.
155 */
156 if (zbookmark_is_before(dnp, zb, td->td_resume))
157 return (RESUME_SKIP_ALL);
158
159 /*
160 * If we found the block we're trying to resume from, zero
161 * the bookmark out to indicate that we have resumed.
162 */
163 ASSERT3U(zb->zb_object, <=, td->td_resume->zb_object);
164 if (bcmp(zb, td->td_resume, sizeof (*zb)) == 0) {
165 bzero(td->td_resume, sizeof (*zb));
166 if (td->td_flags & TRAVERSE_POST)
167 return (RESUME_SKIP_CHILDREN);
168 }
169 }
170 return (RESUME_SKIP_NONE);
171 }
172
173 static void
174 traverse_pause(traverse_data_t *td, const zbookmark_t *zb)
175 {
176 ASSERT(td->td_resume != NULL);
177 ASSERT3U(zb->zb_level, ==, 0);
178 bcopy(zb, td->td_resume, sizeof (*td->td_resume));
179 }
180
181 static int
182 traverse_visitbp(traverse_data_t *td, const dnode_phys_t *dnp,
183 arc_buf_t *pbuf, blkptr_t *bp, const zbookmark_t *zb)
184 {
185 zbookmark_t czb;
186 int err = 0, lasterr = 0;
187 arc_buf_t *buf = NULL;
188 prefetch_data_t *pd = td->td_pfd;
189 boolean_t hard = td->td_flags & TRAVERSE_HARD;
190 boolean_t pause = B_FALSE;
191
192 switch (resume_skip_check(td, dnp, zb)) {
193 case RESUME_SKIP_ALL:
194 return (0);
195 case RESUME_SKIP_CHILDREN:
196 goto post;
197 case RESUME_SKIP_NONE:
198 break;
199 default:
200 ASSERT(0);
201 }
202
203 if (BP_IS_HOLE(bp)) {
204 err = td->td_func(td->td_spa, NULL, NULL, pbuf, zb, dnp,
205 td->td_arg);
206 return (err);
207 }
208
209 if (bp->blk_birth <= td->td_min_txg)
210 return (0);
211
212 if (pd && !pd->pd_exited &&
213 ((pd->pd_flags & TRAVERSE_PREFETCH_DATA) ||
214 BP_GET_TYPE(bp) == DMU_OT_DNODE || BP_GET_LEVEL(bp) > 0)) {
215 mutex_enter(&pd->pd_mtx);
216 ASSERT(pd->pd_blks_fetched >= 0);
217 while (pd->pd_blks_fetched == 0 && !pd->pd_exited)
218 cv_wait(&pd->pd_cv, &pd->pd_mtx);
219 pd->pd_blks_fetched--;
220 cv_broadcast(&pd->pd_cv);
221 mutex_exit(&pd->pd_mtx);
222 }
223
224 if (td->td_flags & TRAVERSE_PRE) {
225 err = td->td_func(td->td_spa, NULL, bp, pbuf, zb, dnp,
226 td->td_arg);
227 if (err == TRAVERSE_VISIT_NO_CHILDREN)
228 return (0);
229 if (err == ERESTART)
230 pause = B_TRUE; /* handle pausing at a common point */
231 if (err != 0)
232 goto post;
233 }
234
235 if (BP_GET_LEVEL(bp) > 0) {
236 uint32_t flags = ARC_WAIT;
237 int i;
238 blkptr_t *cbp;
239 int epb = BP_GET_LSIZE(bp) >> SPA_BLKPTRSHIFT;
240
241 err = dsl_read(NULL, td->td_spa, bp, pbuf,
242 arc_getbuf_func, &buf,
243 ZIO_PRIORITY_ASYNC_READ, ZIO_FLAG_CANFAIL, &flags, zb);
244 if (err)
245 return (err);
246
247 /* recursively visitbp() blocks below this */
248 cbp = buf->b_data;
249 for (i = 0; i < epb; i++, cbp++) {
250 SET_BOOKMARK(&czb, zb->zb_objset, zb->zb_object,
251 zb->zb_level - 1,
252 zb->zb_blkid * epb + i);
300 }
301 if (err == 0 && arc_buf_size(buf) >= sizeof (objset_phys_t)) {
302 dnp = &osp->os_userused_dnode;
303 err = traverse_dnode(td, dnp, buf, zb->zb_objset,
304 DMU_USERUSED_OBJECT);
305 }
306 if (err && hard) {
307 lasterr = err;
308 err = 0;
309 }
310 if (err == 0 && arc_buf_size(buf) >= sizeof (objset_phys_t)) {
311 dnp = &osp->os_groupused_dnode;
312 err = traverse_dnode(td, dnp, buf, zb->zb_objset,
313 DMU_GROUPUSED_OBJECT);
314 }
315 }
316
317 if (buf)
318 (void) arc_buf_remove_ref(buf, &buf);
319
320 post:
321 if (err == 0 && lasterr == 0 && (td->td_flags & TRAVERSE_POST)) {
322 err = td->td_func(td->td_spa, NULL, bp, pbuf, zb, dnp,
323 td->td_arg);
324 if (err == ERESTART)
325 pause = B_TRUE;
326 }
327
328 if (pause && td->td_resume != NULL) {
329 ASSERT3U(err, ==, ERESTART);
330 ASSERT(!hard);
331 traverse_pause(td, zb);
332 }
333
334 return (err != 0 ? err : lasterr);
335 }
336
337 static int
338 traverse_dnode(traverse_data_t *td, const dnode_phys_t *dnp,
339 arc_buf_t *buf, uint64_t objset, uint64_t object)
340 {
341 int j, err = 0, lasterr = 0;
342 zbookmark_t czb;
343 boolean_t hard = (td->td_flags & TRAVERSE_HARD);
344
345 for (j = 0; j < dnp->dn_nblkptr; j++) {
346 SET_BOOKMARK(&czb, objset, object, dnp->dn_nlevels - 1, j);
347 err = traverse_visitbp(td, dnp, buf,
348 (blkptr_t *)&dnp->dn_blkptr[j], &czb);
349 if (err) {
350 if (!hard)
351 break;
352 lasterr = err;
353 }
409
410 td.td_func = traverse_prefetcher;
411 td.td_arg = td_main->td_pfd;
412 td.td_pfd = NULL;
413
414 SET_BOOKMARK(&czb, td.td_objset,
415 ZB_ROOT_OBJECT, ZB_ROOT_LEVEL, ZB_ROOT_BLKID);
416 (void) traverse_visitbp(&td, NULL, NULL, td.td_rootbp, &czb);
417
418 mutex_enter(&td_main->td_pfd->pd_mtx);
419 td_main->td_pfd->pd_exited = B_TRUE;
420 cv_broadcast(&td_main->td_pfd->pd_cv);
421 mutex_exit(&td_main->td_pfd->pd_mtx);
422 }
423
424 /*
425 * NB: dataset must not be changing on-disk (eg, is a snapshot or we are
426 * in syncing context).
427 */
428 static int
429 traverse_impl(spa_t *spa, dsl_dataset_t *ds, uint64_t objset, blkptr_t *rootbp,
430 uint64_t txg_start, zbookmark_t *resume, int flags,
431 blkptr_cb_t func, void *arg)
432 {
433 traverse_data_t td;
434 prefetch_data_t pd = { 0 };
435 zbookmark_t czb;
436 int err;
437
438 ASSERT(ds == NULL || objset == ds->ds_object);
439 ASSERT(!(flags & TRAVERSE_PRE) || !(flags & TRAVERSE_POST));
440
441 td.td_spa = spa;
442 td.td_objset = objset;
443 td.td_rootbp = rootbp;
444 td.td_min_txg = txg_start;
445 td.td_resume = resume;
446 td.td_func = func;
447 td.td_arg = arg;
448 td.td_pfd = &pd;
449 td.td_flags = flags;
450
451 pd.pd_blks_max = zfs_pd_blks_max;
452 pd.pd_flags = flags;
453 mutex_init(&pd.pd_mtx, NULL, MUTEX_DEFAULT, NULL);
454 cv_init(&pd.pd_cv, NULL, CV_DEFAULT, NULL);
455
456 /* See comment on ZIL traversal in dsl_scan_visitds. */
457 if (ds != NULL && !dsl_dataset_is_snapshot(ds)) {
458 objset_t *os;
459
460 err = dmu_objset_from_ds(ds, &os);
461 if (err)
462 return (err);
463
464 traverse_zil(&td, &os->os_zil_header);
465 }
477 pd.pd_cancel = B_TRUE;
478 cv_broadcast(&pd.pd_cv);
479 while (!pd.pd_exited)
480 cv_wait(&pd.pd_cv, &pd.pd_mtx);
481 mutex_exit(&pd.pd_mtx);
482
483 mutex_destroy(&pd.pd_mtx);
484 cv_destroy(&pd.pd_cv);
485
486 return (err);
487 }
488
489 /*
490 * NB: dataset must not be changing on-disk (eg, is a snapshot or we are
491 * in syncing context).
492 */
493 int
494 traverse_dataset(dsl_dataset_t *ds, uint64_t txg_start, int flags,
495 blkptr_cb_t func, void *arg)
496 {
497 return (traverse_impl(ds->ds_dir->dd_pool->dp_spa, ds, ds->ds_object,
498 &ds->ds_phys->ds_bp, txg_start, NULL, flags, func, arg));
499 }
500
501 int
502 traverse_dataset_destroyed(spa_t *spa, blkptr_t *blkptr,
503 uint64_t txg_start, zbookmark_t *resume, int flags,
504 blkptr_cb_t func, void *arg)
505 {
506 return (traverse_impl(spa, NULL, ZB_DESTROYED_OBJSET,
507 blkptr, txg_start, resume, flags, func, arg));
508 }
509
510 /*
511 * NB: pool must not be changing on-disk (eg, from zdb or sync context).
512 */
513 int
514 traverse_pool(spa_t *spa, uint64_t txg_start, int flags,
515 blkptr_cb_t func, void *arg)
516 {
517 int err, lasterr = 0;
518 uint64_t obj;
519 dsl_pool_t *dp = spa_get_dsl(spa);
520 objset_t *mos = dp->dp_meta_objset;
521 boolean_t hard = (flags & TRAVERSE_HARD);
522
523 /* visit the MOS */
524 err = traverse_impl(spa, NULL, 0, spa_get_rootblkptr(spa),
525 txg_start, NULL, flags, func, arg);
526 if (err)
527 return (err);
528
529 /* visit each dataset */
530 for (obj = 1; err == 0 || (err != ESRCH && hard);
531 err = dmu_object_next(mos, &obj, FALSE, txg_start)) {
532 dmu_object_info_t doi;
533
534 err = dmu_object_info(mos, obj, &doi);
535 if (err) {
536 if (!hard)
537 return (err);
538 lasterr = err;
539 continue;
540 }
541
542 if (doi.doi_type == DMU_OT_DSL_DATASET) {
543 dsl_dataset_t *ds;
544 uint64_t txg = txg_start;
545
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