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dmu_traverse.c (219089) dmu_traverse.c (236884)
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

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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.
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

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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.
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>

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48 boolean_t pd_exited;
49} prefetch_data_t;
50
51typedef struct traverse_data {
52 spa_t *td_spa;
53 uint64_t td_objset;
54 blkptr_t *td_rootbp;
55 uint64_t td_min_txg;
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>

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49 boolean_t pd_exited;
50} prefetch_data_t;
51
52typedef 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;
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
62static int traverse_dnode(traverse_data_t *td, const dnode_phys_t *dnp,
63 arc_buf_t *buf, uint64_t objset, uint64_t object);

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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
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
64static int traverse_dnode(traverse_data_t *td, const dnode_phys_t *dnp,
65 arc_buf_t *buf, uint64_t objset, uint64_t object);

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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
133typedef 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 */
147static resume_skip_t
148resume_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
173static void
174traverse_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
131static int
132traverse_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;
181static int
182traverse_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;
140
191
141 if (bp->blk_birth == 0) {
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)) {
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

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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);
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

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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);
167 if (err)
168 return (err);
229 if (err == ERESTART)
230 pause = B_TRUE; /* handle pausing at a common point */
231 if (err != 0)
232 goto post;
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

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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
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

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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
320post:
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);
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;
259 }
260
326 }
327
328 if (pause && td->td_resume != NULL) {
329 ASSERT3U(err, ==, ERESTART);
330 ASSERT(!hard);
331 traverse_pause(td, zb);
332 }
333
261 return (err != 0 ? err : lasterr);
262}
263
264static int
265traverse_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;

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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 */
355static int
334 return (err != 0 ? err : lasterr);
335}
336
337static int
338traverse_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;

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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 */
428static int
356traverse_impl(spa_t *spa, dsl_dataset_t *ds, blkptr_t *rootbp,
357 uint64_t txg_start, int flags, blkptr_cb_t func, void *arg)
429traverse_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)
358{
359 traverse_data_t td;
360 prefetch_data_t pd = { 0 };
361 zbookmark_t czb;
362 int err;
363
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
364 td.td_spa = spa;
441 td.td_spa = spa;
365 td.td_objset = ds ? ds->ds_object : 0;
442 td.td_objset = objset;
366 td.td_rootbp = rootbp;
367 td.td_min_txg = txg_start;
443 td.td_rootbp = rootbp;
444 td.td_min_txg = txg_start;
445 td.td_resume = resume;
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);

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411/*
412 * NB: dataset must not be changing on-disk (eg, is a snapshot or we are
413 * in syncing context).
414 */
415int
416traverse_dataset(dsl_dataset_t *ds, uint64_t txg_start, int flags,
417 blkptr_cb_t func, void *arg)
418{
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);

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489/*
490 * NB: dataset must not be changing on-disk (eg, is a snapshot or we are
491 * in syncing context).
492 */
493int
494traverse_dataset(dsl_dataset_t *ds, uint64_t txg_start, int flags,
495 blkptr_cb_t func, void *arg)
496{
419 return (traverse_impl(ds->ds_dir->dd_pool->dp_spa, ds,
420 &ds->ds_phys->ds_bp, txg_start, flags, func, arg));
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));
421}
422
499}
500
501int
502traverse_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
423/*
424 * NB: pool must not be changing on-disk (eg, from zdb or sync context).
425 */
426int
427traverse_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 */
510/*
511 * NB: pool must not be changing on-disk (eg, from zdb or sync context).
512 */
513int
514traverse_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 */
437 err = traverse_impl(spa, NULL, spa_get_rootblkptr(spa),
438 txg_start, flags, func, arg);
524 err = traverse_impl(spa, NULL, 0, spa_get_rootblkptr(spa),
525 txg_start, NULL, 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

--- 36 unchanged lines hidden --- 		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

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