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34dc7c2f BB |
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 | /* | |
428870ff | 22 | * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved. |
1fa8f795 | 23 | * Copyright (c) 2012, 2014 by Delphix. All rights reserved. |
34dc7c2f BB |
24 | */ |
25 | ||
34dc7c2f BB |
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> | |
428870ff BB |
36 | #include <sys/sa.h> |
37 | #include <sys/sa_impl.h> | |
b128c09f | 38 | #include <sys/callb.h> |
b0bc7a84 | 39 | #include <sys/zfeature.h> |
b128c09f | 40 | |
572e2857 BB |
41 | int zfs_pd_blks_max = 100; |
42 | ||
43 | typedef struct prefetch_data { | |
b128c09f BB |
44 | kmutex_t pd_mtx; |
45 | kcondvar_t pd_cv; | |
46 | int pd_blks_max; | |
47 | int pd_blks_fetched; | |
48 | int pd_flags; | |
49 | boolean_t pd_cancel; | |
50 | boolean_t pd_exited; | |
572e2857 | 51 | } prefetch_data_t; |
b128c09f | 52 | |
572e2857 | 53 | typedef struct traverse_data { |
b128c09f BB |
54 | spa_t *td_spa; |
55 | uint64_t td_objset; | |
56 | blkptr_t *td_rootbp; | |
57 | uint64_t td_min_txg; | |
5dbd68a3 | 58 | zbookmark_phys_t *td_resume; |
b128c09f | 59 | int td_flags; |
572e2857 | 60 | prefetch_data_t *td_pfd; |
fbeddd60 | 61 | boolean_t td_paused; |
b128c09f BB |
62 | blkptr_cb_t *td_func; |
63 | void *td_arg; | |
572e2857 | 64 | } traverse_data_t; |
34dc7c2f | 65 | |
572e2857 | 66 | static int traverse_dnode(traverse_data_t *td, const dnode_phys_t *dnp, |
294f6806 | 67 | uint64_t objset, uint64_t object); |
96b89346 | 68 | static void prefetch_dnode_metadata(traverse_data_t *td, const dnode_phys_t *, |
294f6806 | 69 | uint64_t objset, uint64_t object); |
9babb374 | 70 | |
428870ff | 71 | static int |
34dc7c2f BB |
72 | traverse_zil_block(zilog_t *zilog, blkptr_t *bp, void *arg, uint64_t claim_txg) |
73 | { | |
572e2857 | 74 | traverse_data_t *td = arg; |
5dbd68a3 | 75 | zbookmark_phys_t zb; |
34dc7c2f | 76 | |
b0bc7a84 | 77 | if (BP_IS_HOLE(bp)) |
428870ff | 78 | return (0); |
34dc7c2f | 79 | |
b128c09f | 80 | if (claim_txg == 0 && bp->blk_birth >= spa_first_txg(td->td_spa)) |
428870ff BB |
81 | return (0); |
82 | ||
83 | SET_BOOKMARK(&zb, td->td_objset, ZB_ZIL_OBJECT, ZB_ZIL_LEVEL, | |
84 | bp->blk_cksum.zc_word[ZIL_ZC_SEQ]); | |
85 | ||
294f6806 | 86 | (void) td->td_func(td->td_spa, zilog, bp, &zb, NULL, td->td_arg); |
b128c09f | 87 | |
428870ff | 88 | return (0); |
34dc7c2f BB |
89 | } |
90 | ||
428870ff | 91 | static int |
34dc7c2f BB |
92 | traverse_zil_record(zilog_t *zilog, lr_t *lrc, void *arg, uint64_t claim_txg) |
93 | { | |
572e2857 | 94 | traverse_data_t *td = arg; |
34dc7c2f BB |
95 | |
96 | if (lrc->lrc_txtype == TX_WRITE) { | |
97 | lr_write_t *lr = (lr_write_t *)lrc; | |
98 | blkptr_t *bp = &lr->lr_blkptr; | |
5dbd68a3 | 99 | zbookmark_phys_t zb; |
34dc7c2f | 100 | |
b0bc7a84 | 101 | if (BP_IS_HOLE(bp)) |
428870ff | 102 | return (0); |
34dc7c2f | 103 | |
b128c09f | 104 | if (claim_txg == 0 || bp->blk_birth < claim_txg) |
428870ff | 105 | return (0); |
b128c09f | 106 | |
572e2857 BB |
107 | SET_BOOKMARK(&zb, td->td_objset, lr->lr_foid, |
108 | ZB_ZIL_LEVEL, lr->lr_offset / BP_GET_LSIZE(bp)); | |
428870ff | 109 | |
294f6806 | 110 | (void) td->td_func(td->td_spa, zilog, bp, &zb, NULL, |
428870ff | 111 | td->td_arg); |
34dc7c2f | 112 | } |
428870ff | 113 | return (0); |
34dc7c2f BB |
114 | } |
115 | ||
116 | static void | |
572e2857 | 117 | traverse_zil(traverse_data_t *td, zil_header_t *zh) |
34dc7c2f | 118 | { |
34dc7c2f BB |
119 | uint64_t claim_txg = zh->zh_claim_txg; |
120 | zilog_t *zilog; | |
121 | ||
34dc7c2f BB |
122 | /* |
123 | * We only want to visit blocks that have been claimed but not yet | |
428870ff | 124 | * replayed; plus, in read-only mode, blocks that are already stable. |
34dc7c2f | 125 | */ |
fb5f0bc8 | 126 | if (claim_txg == 0 && spa_writeable(td->td_spa)) |
34dc7c2f BB |
127 | return; |
128 | ||
b128c09f | 129 | zilog = zil_alloc(spa_get_dsl(td->td_spa)->dp_meta_objset, zh); |
34dc7c2f | 130 | |
b128c09f | 131 | (void) zil_parse(zilog, traverse_zil_block, traverse_zil_record, td, |
34dc7c2f BB |
132 | claim_txg); |
133 | ||
134 | zil_free(zilog); | |
135 | } | |
136 | ||
9ae529ec CS |
137 | typedef enum resume_skip { |
138 | RESUME_SKIP_ALL, | |
139 | RESUME_SKIP_NONE, | |
140 | RESUME_SKIP_CHILDREN | |
141 | } resume_skip_t; | |
142 | ||
143 | /* | |
144 | * Returns RESUME_SKIP_ALL if td indicates that we are resuming a traversal and | |
145 | * the block indicated by zb does not need to be visited at all. Returns | |
146 | * RESUME_SKIP_CHILDREN if we are resuming a post traversal and we reach the | |
147 | * resume point. This indicates that this block should be visited but not its | |
148 | * children (since they must have been visited in a previous traversal). | |
149 | * Otherwise returns RESUME_SKIP_NONE. | |
150 | */ | |
151 | static resume_skip_t | |
152 | resume_skip_check(traverse_data_t *td, const dnode_phys_t *dnp, | |
5dbd68a3 | 153 | const zbookmark_phys_t *zb) |
9ae529ec CS |
154 | { |
155 | if (td->td_resume != NULL && !ZB_IS_ZERO(td->td_resume)) { | |
156 | /* | |
157 | * If we already visited this bp & everything below, | |
158 | * don't bother doing it again. | |
159 | */ | |
160 | if (zbookmark_is_before(dnp, zb, td->td_resume)) | |
161 | return (RESUME_SKIP_ALL); | |
162 | ||
163 | /* | |
164 | * If we found the block we're trying to resume from, zero | |
165 | * the bookmark out to indicate that we have resumed. | |
166 | */ | |
9ae529ec CS |
167 | if (bcmp(zb, td->td_resume, sizeof (*zb)) == 0) { |
168 | bzero(td->td_resume, sizeof (*zb)); | |
169 | if (td->td_flags & TRAVERSE_POST) | |
170 | return (RESUME_SKIP_CHILDREN); | |
171 | } | |
172 | } | |
173 | return (RESUME_SKIP_NONE); | |
174 | } | |
175 | ||
96b89346 MA |
176 | static void |
177 | traverse_prefetch_metadata(traverse_data_t *td, | |
5dbd68a3 | 178 | const blkptr_t *bp, const zbookmark_phys_t *zb) |
96b89346 MA |
179 | { |
180 | uint32_t flags = ARC_NOWAIT | ARC_PREFETCH; | |
181 | ||
182 | if (!(td->td_flags & TRAVERSE_PREFETCH_METADATA)) | |
183 | return; | |
184 | /* | |
185 | * If we are in the process of resuming, don't prefetch, because | |
186 | * some children will not be needed (and in fact may have already | |
187 | * been freed). | |
188 | */ | |
189 | if (td->td_resume != NULL && !ZB_IS_ZERO(td->td_resume)) | |
190 | return; | |
191 | if (BP_IS_HOLE(bp) || bp->blk_birth <= td->td_min_txg) | |
192 | return; | |
193 | if (BP_GET_LEVEL(bp) == 0 && BP_GET_TYPE(bp) != DMU_OT_DNODE) | |
194 | return; | |
195 | ||
294f6806 GW |
196 | (void) arc_read(NULL, td->td_spa, bp, NULL, NULL, |
197 | ZIO_PRIORITY_ASYNC_READ, ZIO_FLAG_CANFAIL, &flags, zb); | |
96b89346 MA |
198 | } |
199 | ||
1fa8f795 MA |
200 | static boolean_t |
201 | prefetch_needed(prefetch_data_t *pfd, const blkptr_t *bp) | |
202 | { | |
203 | ASSERT(pfd->pd_flags & TRAVERSE_PREFETCH_DATA); | |
204 | if (BP_IS_HOLE(bp) || BP_IS_EMBEDDED(bp) || | |
205 | BP_GET_TYPE(bp) == DMU_OT_INTENT_LOG) | |
206 | return (B_FALSE); | |
207 | return (B_TRUE); | |
208 | } | |
209 | ||
c7f8f831 BB |
210 | static int |
211 | traverse_visitbp(traverse_data_t *td, const dnode_phys_t *dnp, | |
5dbd68a3 | 212 | const blkptr_t *bp, const zbookmark_phys_t *zb) |
6656bf56 | 213 | { |
fbeddd60 | 214 | int err = 0; |
c7f8f831 | 215 | arc_buf_t *buf = NULL; |
9ae529ec CS |
216 | |
217 | switch (resume_skip_check(td, dnp, zb)) { | |
218 | case RESUME_SKIP_ALL: | |
219 | return (0); | |
220 | case RESUME_SKIP_CHILDREN: | |
221 | goto post; | |
222 | case RESUME_SKIP_NONE: | |
223 | break; | |
224 | default: | |
225 | ASSERT(0); | |
226 | } | |
6656bf56 | 227 | |
b0bc7a84 MG |
228 | if (bp->blk_birth == 0) { |
229 | if (spa_feature_is_active(td->td_spa, SPA_FEATURE_HOLE_BIRTH)) { | |
230 | /* | |
231 | * Since this block has a birth time of 0 it must be a | |
232 | * hole created before the SPA_FEATURE_HOLE_BIRTH | |
233 | * feature was enabled. If SPA_FEATURE_HOLE_BIRTH | |
234 | * was enabled before the min_txg for this traveral we | |
235 | * know the hole must have been created before the | |
236 | * min_txg for this traveral, so we can skip it. If | |
237 | * SPA_FEATURE_HOLE_BIRTH was enabled after the min_txg | |
238 | * for this traveral we cannot tell if the hole was | |
239 | * created before or after the min_txg for this | |
240 | * traversal, so we cannot skip it. | |
241 | */ | |
242 | uint64_t hole_birth_enabled_txg; | |
243 | VERIFY(spa_feature_enabled_txg(td->td_spa, | |
244 | SPA_FEATURE_HOLE_BIRTH, &hole_birth_enabled_txg)); | |
245 | if (hole_birth_enabled_txg < td->td_min_txg) | |
246 | return (0); | |
247 | } | |
248 | } else if (bp->blk_birth <= td->td_min_txg) { | |
249 | return (0); | |
250 | } | |
251 | ||
1fa8f795 MA |
252 | if (td->td_pfd != NULL && !td->td_pfd->pd_exited && |
253 | prefetch_needed(td->td_pfd, bp)) { | |
a1687880 BB |
254 | mutex_enter(&td->td_pfd->pd_mtx); |
255 | ASSERT(td->td_pfd->pd_blks_fetched >= 0); | |
256 | while (td->td_pfd->pd_blks_fetched == 0 && | |
257 | !td->td_pfd->pd_exited) | |
258 | cv_wait(&td->td_pfd->pd_cv, &td->td_pfd->pd_mtx); | |
259 | td->td_pfd->pd_blks_fetched--; | |
260 | cv_broadcast(&td->td_pfd->pd_cv); | |
261 | mutex_exit(&td->td_pfd->pd_mtx); | |
34dc7c2f BB |
262 | } |
263 | ||
1fa8f795 MA |
264 | if (BP_IS_HOLE(bp)) { |
265 | err = td->td_func(td->td_spa, NULL, bp, zb, dnp, td->td_arg); | |
266 | if (err != 0) | |
267 | goto post; | |
268 | return (0); | |
269 | } | |
270 | ||
c7f8f831 | 271 | if (td->td_flags & TRAVERSE_PRE) { |
294f6806 | 272 | err = td->td_func(td->td_spa, NULL, bp, zb, dnp, |
c7f8f831 BB |
273 | td->td_arg); |
274 | if (err == TRAVERSE_VISIT_NO_CHILDREN) | |
572e2857 | 275 | return (0); |
9ae529ec CS |
276 | if (err != 0) |
277 | goto post; | |
34dc7c2f BB |
278 | } |
279 | ||
c7f8f831 BB |
280 | if (BP_GET_LEVEL(bp) > 0) { |
281 | uint32_t flags = ARC_WAIT; | |
a1687880 BB |
282 | int32_t i; |
283 | int32_t epb = BP_GET_LSIZE(bp) >> SPA_BLKPTRSHIFT; | |
5dbd68a3 | 284 | zbookmark_phys_t *czb; |
b128c09f | 285 | |
294f6806 | 286 | err = arc_read(NULL, td->td_spa, bp, arc_getbuf_func, &buf, |
c7f8f831 | 287 | ZIO_PRIORITY_ASYNC_READ, ZIO_FLAG_CANFAIL, &flags, zb); |
13fe0198 | 288 | if (err != 0) |
fbeddd60 | 289 | goto post; |
a1687880 | 290 | |
5dbd68a3 | 291 | czb = kmem_alloc(sizeof (zbookmark_phys_t), KM_PUSHPAGE); |
96b89346 MA |
292 | |
293 | for (i = 0; i < epb; i++) { | |
a1687880 | 294 | SET_BOOKMARK(czb, zb->zb_objset, zb->zb_object, |
96b89346 MA |
295 | zb->zb_level - 1, |
296 | zb->zb_blkid * epb + i); | |
a1687880 BB |
297 | traverse_prefetch_metadata(td, |
298 | &((blkptr_t *)buf->b_data)[i], czb); | |
96b89346 | 299 | } |
b128c09f BB |
300 | |
301 | /* recursively visitbp() blocks below this */ | |
96b89346 | 302 | for (i = 0; i < epb; i++) { |
a1687880 | 303 | SET_BOOKMARK(czb, zb->zb_objset, zb->zb_object, |
c7f8f831 BB |
304 | zb->zb_level - 1, |
305 | zb->zb_blkid * epb + i); | |
a1687880 BB |
306 | err = traverse_visitbp(td, dnp, |
307 | &((blkptr_t *)buf->b_data)[i], czb); | |
fbeddd60 MA |
308 | if (err != 0) |
309 | break; | |
b128c09f | 310 | } |
a1687880 | 311 | |
5dbd68a3 | 312 | kmem_free(czb, sizeof (zbookmark_phys_t)); |
a1687880 | 313 | |
c7f8f831 BB |
314 | } else if (BP_GET_TYPE(bp) == DMU_OT_DNODE) { |
315 | uint32_t flags = ARC_WAIT; | |
a1687880 BB |
316 | int32_t i; |
317 | int32_t epb = BP_GET_LSIZE(bp) >> DNODE_SHIFT; | |
b128c09f | 318 | |
294f6806 | 319 | err = arc_read(NULL, td->td_spa, bp, arc_getbuf_func, &buf, |
c7f8f831 | 320 | ZIO_PRIORITY_ASYNC_READ, ZIO_FLAG_CANFAIL, &flags, zb); |
13fe0198 | 321 | if (err != 0) |
fbeddd60 | 322 | goto post; |
96b89346 MA |
323 | dnp = buf->b_data; |
324 | ||
325 | for (i = 0; i < epb; i++) { | |
294f6806 | 326 | prefetch_dnode_metadata(td, &dnp[i], zb->zb_objset, |
96b89346 MA |
327 | zb->zb_blkid * epb + i); |
328 | } | |
b128c09f BB |
329 | |
330 | /* recursively visitbp() blocks below this */ | |
96b89346 | 331 | for (i = 0; i < epb; i++) { |
294f6806 | 332 | err = traverse_dnode(td, &dnp[i], zb->zb_objset, |
c7f8f831 | 333 | zb->zb_blkid * epb + i); |
fbeddd60 MA |
334 | if (err != 0) |
335 | break; | |
34dc7c2f | 336 | } |
c7f8f831 BB |
337 | } else if (BP_GET_TYPE(bp) == DMU_OT_OBJSET) { |
338 | uint32_t flags = ARC_WAIT; | |
339 | objset_phys_t *osp; | |
340 | dnode_phys_t *dnp; | |
341 | ||
294f6806 | 342 | err = arc_read(NULL, td->td_spa, bp, arc_getbuf_func, &buf, |
c7f8f831 | 343 | ZIO_PRIORITY_ASYNC_READ, ZIO_FLAG_CANFAIL, &flags, zb); |
13fe0198 | 344 | if (err != 0) |
fbeddd60 | 345 | goto post; |
c7f8f831 BB |
346 | |
347 | osp = buf->b_data; | |
348 | dnp = &osp->os_meta_dnode; | |
294f6806 | 349 | prefetch_dnode_metadata(td, dnp, zb->zb_objset, |
96b89346 MA |
350 | DMU_META_DNODE_OBJECT); |
351 | if (arc_buf_size(buf) >= sizeof (objset_phys_t)) { | |
96b89346 | 352 | prefetch_dnode_metadata(td, &osp->os_groupused_dnode, |
8b464649 MA |
353 | zb->zb_objset, DMU_GROUPUSED_OBJECT); |
354 | prefetch_dnode_metadata(td, &osp->os_userused_dnode, | |
294f6806 | 355 | zb->zb_objset, DMU_USERUSED_OBJECT); |
96b89346 MA |
356 | } |
357 | ||
294f6806 | 358 | err = traverse_dnode(td, dnp, zb->zb_objset, |
c7f8f831 | 359 | DMU_META_DNODE_OBJECT); |
c7f8f831 | 360 | if (err == 0 && arc_buf_size(buf) >= sizeof (objset_phys_t)) { |
8b464649 | 361 | dnp = &osp->os_groupused_dnode; |
294f6806 | 362 | err = traverse_dnode(td, dnp, zb->zb_objset, |
8b464649 | 363 | DMU_GROUPUSED_OBJECT); |
9babb374 | 364 | } |
c7f8f831 | 365 | if (err == 0 && arc_buf_size(buf) >= sizeof (objset_phys_t)) { |
8b464649 | 366 | dnp = &osp->os_userused_dnode; |
294f6806 | 367 | err = traverse_dnode(td, dnp, zb->zb_objset, |
8b464649 | 368 | DMU_USERUSED_OBJECT); |
34dc7c2f | 369 | } |
34dc7c2f BB |
370 | } |
371 | ||
c7f8f831 BB |
372 | if (buf) |
373 | (void) arc_buf_remove_ref(buf, &buf); | |
34dc7c2f | 374 | |
9ae529ec | 375 | post: |
fbeddd60 | 376 | if (err == 0 && (td->td_flags & TRAVERSE_POST)) |
294f6806 | 377 | err = td->td_func(td->td_spa, NULL, bp, zb, dnp, td->td_arg); |
fbeddd60 MA |
378 | |
379 | if ((td->td_flags & TRAVERSE_HARD) && (err == EIO || err == ECKSUM)) { | |
380 | /* | |
381 | * Ignore this disk error as requested by the HARD flag, | |
382 | * and continue traversal. | |
383 | */ | |
384 | err = 0; | |
9ae529ec CS |
385 | } |
386 | ||
fbeddd60 MA |
387 | /* |
388 | * If we are stopping here, set td_resume. | |
389 | */ | |
390 | if (td->td_resume != NULL && err != 0 && !td->td_paused) { | |
391 | td->td_resume->zb_objset = zb->zb_objset; | |
392 | td->td_resume->zb_object = zb->zb_object; | |
393 | td->td_resume->zb_level = 0; | |
394 | /* | |
395 | * If we have stopped on an indirect block (e.g. due to | |
396 | * i/o error), we have not visited anything below it. | |
397 | * Set the bookmark to the first level-0 block that we need | |
398 | * to visit. This way, the resuming code does not need to | |
399 | * deal with resuming from indirect blocks. | |
400 | */ | |
401 | td->td_resume->zb_blkid = zb->zb_blkid << | |
402 | (zb->zb_level * (dnp->dn_indblkshift - SPA_BLKPTRSHIFT)); | |
403 | td->td_paused = B_TRUE; | |
428870ff | 404 | } |
34dc7c2f | 405 | |
fbeddd60 | 406 | return (err); |
34dc7c2f BB |
407 | } |
408 | ||
96b89346 MA |
409 | static void |
410 | prefetch_dnode_metadata(traverse_data_t *td, const dnode_phys_t *dnp, | |
294f6806 | 411 | uint64_t objset, uint64_t object) |
96b89346 MA |
412 | { |
413 | int j; | |
5dbd68a3 | 414 | zbookmark_phys_t czb; |
96b89346 MA |
415 | |
416 | for (j = 0; j < dnp->dn_nblkptr; j++) { | |
417 | SET_BOOKMARK(&czb, objset, object, dnp->dn_nlevels - 1, j); | |
294f6806 | 418 | traverse_prefetch_metadata(td, &dnp->dn_blkptr[j], &czb); |
96b89346 MA |
419 | } |
420 | ||
421 | if (dnp->dn_flags & DNODE_FLAG_SPILL_BLKPTR) { | |
422 | SET_BOOKMARK(&czb, objset, object, 0, DMU_SPILL_BLKID); | |
294f6806 | 423 | traverse_prefetch_metadata(td, &dnp->dn_spill, &czb); |
96b89346 MA |
424 | } |
425 | } | |
426 | ||
9babb374 | 427 | static int |
572e2857 | 428 | traverse_dnode(traverse_data_t *td, const dnode_phys_t *dnp, |
294f6806 | 429 | uint64_t objset, uint64_t object) |
9babb374 | 430 | { |
fbeddd60 | 431 | int j, err = 0; |
5dbd68a3 | 432 | zbookmark_phys_t czb; |
9babb374 BB |
433 | |
434 | for (j = 0; j < dnp->dn_nblkptr; j++) { | |
435 | SET_BOOKMARK(&czb, objset, object, dnp->dn_nlevels - 1, j); | |
294f6806 | 436 | err = traverse_visitbp(td, dnp, &dnp->dn_blkptr[j], &czb); |
fbeddd60 MA |
437 | if (err != 0) |
438 | break; | |
9babb374 | 439 | } |
428870ff BB |
440 | |
441 | if (dnp->dn_flags & DNODE_FLAG_SPILL_BLKPTR) { | |
96b89346 | 442 | SET_BOOKMARK(&czb, objset, object, 0, DMU_SPILL_BLKID); |
294f6806 | 443 | err = traverse_visitbp(td, dnp, &dnp->dn_spill, &czb); |
428870ff | 444 | } |
fbeddd60 | 445 | return (err); |
9babb374 BB |
446 | } |
447 | ||
b128c09f BB |
448 | /* ARGSUSED */ |
449 | static int | |
428870ff | 450 | traverse_prefetcher(spa_t *spa, zilog_t *zilog, const blkptr_t *bp, |
5dbd68a3 | 451 | const zbookmark_phys_t *zb, const dnode_phys_t *dnp, void *arg) |
34dc7c2f | 452 | { |
572e2857 | 453 | prefetch_data_t *pfd = arg; |
b128c09f | 454 | uint32_t aflags = ARC_NOWAIT | ARC_PREFETCH; |
34dc7c2f | 455 | |
b128c09f BB |
456 | ASSERT(pfd->pd_blks_fetched >= 0); |
457 | if (pfd->pd_cancel) | |
2e528b49 | 458 | return (SET_ERROR(EINTR)); |
34dc7c2f | 459 | |
1fa8f795 | 460 | if (!prefetch_needed(pfd, bp)) |
34dc7c2f BB |
461 | return (0); |
462 | ||
b128c09f BB |
463 | mutex_enter(&pfd->pd_mtx); |
464 | while (!pfd->pd_cancel && pfd->pd_blks_fetched >= pfd->pd_blks_max) | |
465 | cv_wait(&pfd->pd_cv, &pfd->pd_mtx); | |
466 | pfd->pd_blks_fetched++; | |
467 | cv_broadcast(&pfd->pd_cv); | |
468 | mutex_exit(&pfd->pd_mtx); | |
34dc7c2f | 469 | |
294f6806 GW |
470 | (void) arc_read(NULL, spa, bp, NULL, NULL, ZIO_PRIORITY_ASYNC_READ, |
471 | ZIO_FLAG_CANFAIL | ZIO_FLAG_SPECULATIVE, &aflags, zb); | |
34dc7c2f | 472 | |
b128c09f | 473 | return (0); |
34dc7c2f BB |
474 | } |
475 | ||
34dc7c2f | 476 | static void |
b128c09f | 477 | traverse_prefetch_thread(void *arg) |
34dc7c2f | 478 | { |
572e2857 BB |
479 | traverse_data_t *td_main = arg; |
480 | traverse_data_t td = *td_main; | |
5dbd68a3 | 481 | zbookmark_phys_t czb; |
34dc7c2f | 482 | |
b128c09f BB |
483 | td.td_func = traverse_prefetcher; |
484 | td.td_arg = td_main->td_pfd; | |
485 | td.td_pfd = NULL; | |
34dc7c2f | 486 | |
428870ff BB |
487 | SET_BOOKMARK(&czb, td.td_objset, |
488 | ZB_ROOT_OBJECT, ZB_ROOT_LEVEL, ZB_ROOT_BLKID); | |
294f6806 | 489 | (void) traverse_visitbp(&td, NULL, td.td_rootbp, &czb); |
34dc7c2f | 490 | |
b128c09f BB |
491 | mutex_enter(&td_main->td_pfd->pd_mtx); |
492 | td_main->td_pfd->pd_exited = B_TRUE; | |
493 | cv_broadcast(&td_main->td_pfd->pd_cv); | |
494 | mutex_exit(&td_main->td_pfd->pd_mtx); | |
34dc7c2f BB |
495 | } |
496 | ||
b128c09f BB |
497 | /* |
498 | * NB: dataset must not be changing on-disk (eg, is a snapshot or we are | |
499 | * in syncing context). | |
500 | */ | |
501 | static int | |
9ae529ec | 502 | traverse_impl(spa_t *spa, dsl_dataset_t *ds, uint64_t objset, blkptr_t *rootbp, |
5dbd68a3 | 503 | uint64_t txg_start, zbookmark_phys_t *resume, int flags, |
9ae529ec | 504 | blkptr_cb_t func, void *arg) |
34dc7c2f | 505 | { |
47050a88 BB |
506 | traverse_data_t *td; |
507 | prefetch_data_t *pd; | |
5dbd68a3 | 508 | zbookmark_phys_t *czb; |
b128c09f | 509 | int err; |
34dc7c2f | 510 | |
9ae529ec CS |
511 | ASSERT(ds == NULL || objset == ds->ds_object); |
512 | ASSERT(!(flags & TRAVERSE_PRE) || !(flags & TRAVERSE_POST)); | |
513 | ||
96b89346 MA |
514 | /* |
515 | * The data prefetching mechanism (the prefetch thread) is incompatible | |
516 | * with resuming from a bookmark. | |
517 | */ | |
518 | ASSERT(resume == NULL || !(flags & TRAVERSE_PREFETCH_DATA)); | |
519 | ||
a1687880 BB |
520 | td = kmem_alloc(sizeof (traverse_data_t), KM_PUSHPAGE); |
521 | pd = kmem_zalloc(sizeof (prefetch_data_t), KM_PUSHPAGE); | |
5dbd68a3 | 522 | czb = kmem_alloc(sizeof (zbookmark_phys_t), KM_PUSHPAGE); |
47050a88 BB |
523 | |
524 | td->td_spa = spa; | |
9ae529ec | 525 | td->td_objset = objset; |
47050a88 BB |
526 | td->td_rootbp = rootbp; |
527 | td->td_min_txg = txg_start; | |
9ae529ec | 528 | td->td_resume = resume; |
47050a88 BB |
529 | td->td_func = func; |
530 | td->td_arg = arg; | |
531 | td->td_pfd = pd; | |
532 | td->td_flags = flags; | |
fbeddd60 | 533 | td->td_paused = B_FALSE; |
b128c09f | 534 | |
47050a88 BB |
535 | pd->pd_blks_max = zfs_pd_blks_max; |
536 | pd->pd_flags = flags; | |
537 | mutex_init(&pd->pd_mtx, NULL, MUTEX_DEFAULT, NULL); | |
538 | cv_init(&pd->pd_cv, NULL, CV_DEFAULT, NULL); | |
b128c09f | 539 | |
1421c891 PS |
540 | SET_BOOKMARK(czb, td->td_objset, |
541 | ZB_ROOT_OBJECT, ZB_ROOT_LEVEL, ZB_ROOT_BLKID); | |
542 | ||
572e2857 | 543 | /* See comment on ZIL traversal in dsl_scan_visitds. */ |
13fe0198 MA |
544 | if (ds != NULL && !dsl_dataset_is_snapshot(ds) && !BP_IS_HOLE(rootbp)) { |
545 | uint32_t flags = ARC_WAIT; | |
546 | objset_phys_t *osp; | |
547 | arc_buf_t *buf; | |
572e2857 | 548 | |
13fe0198 MA |
549 | err = arc_read(NULL, td->td_spa, rootbp, |
550 | arc_getbuf_func, &buf, | |
1421c891 | 551 | ZIO_PRIORITY_ASYNC_READ, ZIO_FLAG_CANFAIL, &flags, czb); |
13fe0198 | 552 | if (err != 0) |
572e2857 BB |
553 | return (err); |
554 | ||
13fe0198 MA |
555 | osp = buf->b_data; |
556 | traverse_zil(td, &osp->os_zil_header); | |
557 | (void) arc_buf_remove_ref(buf, &buf); | |
572e2857 BB |
558 | } |
559 | ||
96b89346 | 560 | if (!(flags & TRAVERSE_PREFETCH_DATA) || |
b128c09f | 561 | 0 == taskq_dispatch(system_taskq, traverse_prefetch_thread, |
47050a88 BB |
562 | td, TQ_NOQUEUE)) |
563 | pd->pd_exited = B_TRUE; | |
b128c09f | 564 | |
294f6806 | 565 | err = traverse_visitbp(td, NULL, rootbp, czb); |
47050a88 BB |
566 | |
567 | mutex_enter(&pd->pd_mtx); | |
568 | pd->pd_cancel = B_TRUE; | |
569 | cv_broadcast(&pd->pd_cv); | |
570 | while (!pd->pd_exited) | |
571 | cv_wait(&pd->pd_cv, &pd->pd_mtx); | |
572 | mutex_exit(&pd->pd_mtx); | |
b128c09f | 573 | |
47050a88 BB |
574 | mutex_destroy(&pd->pd_mtx); |
575 | cv_destroy(&pd->pd_cv); | |
b128c09f | 576 | |
5dbd68a3 | 577 | kmem_free(czb, sizeof (zbookmark_phys_t)); |
a1687880 BB |
578 | kmem_free(pd, sizeof (struct prefetch_data)); |
579 | kmem_free(td, sizeof (struct traverse_data)); | |
34dc7c2f | 580 | |
b128c09f | 581 | return (err); |
34dc7c2f BB |
582 | } |
583 | ||
b128c09f BB |
584 | /* |
585 | * NB: dataset must not be changing on-disk (eg, is a snapshot or we are | |
586 | * in syncing context). | |
587 | */ | |
588 | int | |
589 | traverse_dataset(dsl_dataset_t *ds, uint64_t txg_start, int flags, | |
590 | blkptr_cb_t func, void *arg) | |
34dc7c2f | 591 | { |
9ae529ec CS |
592 | return (traverse_impl(ds->ds_dir->dd_pool->dp_spa, ds, ds->ds_object, |
593 | &ds->ds_phys->ds_bp, txg_start, NULL, flags, func, arg)); | |
594 | } | |
595 | ||
596 | int | |
597 | traverse_dataset_destroyed(spa_t *spa, blkptr_t *blkptr, | |
5dbd68a3 | 598 | uint64_t txg_start, zbookmark_phys_t *resume, int flags, |
9ae529ec CS |
599 | blkptr_cb_t func, void *arg) |
600 | { | |
601 | return (traverse_impl(spa, NULL, ZB_DESTROYED_OBJSET, | |
602 | blkptr, txg_start, resume, flags, func, arg)); | |
34dc7c2f BB |
603 | } |
604 | ||
b128c09f BB |
605 | /* |
606 | * NB: pool must not be changing on-disk (eg, from zdb or sync context). | |
607 | */ | |
608 | int | |
428870ff BB |
609 | traverse_pool(spa_t *spa, uint64_t txg_start, int flags, |
610 | blkptr_cb_t func, void *arg) | |
34dc7c2f | 611 | { |
fbeddd60 | 612 | int err; |
b128c09f BB |
613 | uint64_t obj; |
614 | dsl_pool_t *dp = spa_get_dsl(spa); | |
615 | objset_t *mos = dp->dp_meta_objset; | |
428870ff | 616 | boolean_t hard = (flags & TRAVERSE_HARD); |
b128c09f BB |
617 | |
618 | /* visit the MOS */ | |
9ae529ec CS |
619 | err = traverse_impl(spa, NULL, 0, spa_get_rootblkptr(spa), |
620 | txg_start, NULL, flags, func, arg); | |
13fe0198 | 621 | if (err != 0) |
b128c09f BB |
622 | return (err); |
623 | ||
624 | /* visit each dataset */ | |
fbeddd60 | 625 | for (obj = 1; err == 0; |
428870ff | 626 | err = dmu_object_next(mos, &obj, FALSE, txg_start)) { |
b128c09f BB |
627 | dmu_object_info_t doi; |
628 | ||
629 | err = dmu_object_info(mos, obj, &doi); | |
13fe0198 | 630 | if (err != 0) { |
fbeddd60 MA |
631 | if (hard) |
632 | continue; | |
633 | break; | |
428870ff | 634 | } |
b128c09f | 635 | |
fa86b5db | 636 | if (doi.doi_bonus_type == DMU_OT_DSL_DATASET) { |
b128c09f | 637 | dsl_dataset_t *ds; |
428870ff BB |
638 | uint64_t txg = txg_start; |
639 | ||
13fe0198 | 640 | dsl_pool_config_enter(dp, FTAG); |
b128c09f | 641 | err = dsl_dataset_hold_obj(dp, obj, FTAG, &ds); |
13fe0198 MA |
642 | dsl_pool_config_exit(dp, FTAG); |
643 | if (err != 0) { | |
fbeddd60 MA |
644 | if (hard) |
645 | continue; | |
646 | break; | |
428870ff BB |
647 | } |
648 | if (ds->ds_phys->ds_prev_snap_txg > txg) | |
649 | txg = ds->ds_phys->ds_prev_snap_txg; | |
650 | err = traverse_dataset(ds, txg, flags, func, arg); | |
b128c09f | 651 | dsl_dataset_rele(ds, FTAG); |
fbeddd60 MA |
652 | if (err != 0) |
653 | break; | |
b128c09f | 654 | } |
34dc7c2f | 655 | } |
b128c09f BB |
656 | if (err == ESRCH) |
657 | err = 0; | |
fbeddd60 | 658 | return (err); |
34dc7c2f | 659 | } |
c28b2279 BB |
660 | |
661 | #if defined(_KERNEL) && defined(HAVE_SPL) | |
662 | EXPORT_SYMBOL(traverse_dataset); | |
663 | EXPORT_SYMBOL(traverse_pool); | |
c409e464 BB |
664 | |
665 | module_param(zfs_pd_blks_max, int, 0644); | |
666 | MODULE_PARM_DESC(zfs_pd_blks_max, "Max number of blocks to prefetch"); | |
c28b2279 | 667 | #endif |