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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. |
c352ec27 | 23 | * Copyright (c) 2012, 2016 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 | |
b738bc5a | 41 | int32_t zfs_pd_bytes_max = 50 * 1024 * 1024; /* 50MB */ |
690fe647 | 42 | int32_t send_holes_without_birth_time = 1; |
572e2857 BB |
43 | |
44 | typedef struct prefetch_data { | |
b128c09f BB |
45 | kmutex_t pd_mtx; |
46 | kcondvar_t pd_cv; | |
b738bc5a | 47 | int32_t pd_bytes_fetched; |
b128c09f BB |
48 | int pd_flags; |
49 | boolean_t pd_cancel; | |
50 | boolean_t pd_exited; | |
47dfff3b | 51 | zbookmark_phys_t pd_resume; |
572e2857 | 52 | } prefetch_data_t; |
b128c09f | 53 | |
572e2857 | 54 | typedef struct traverse_data { |
b128c09f BB |
55 | spa_t *td_spa; |
56 | uint64_t td_objset; | |
57 | blkptr_t *td_rootbp; | |
58 | uint64_t td_min_txg; | |
5dbd68a3 | 59 | zbookmark_phys_t *td_resume; |
b128c09f | 60 | int td_flags; |
572e2857 | 61 | prefetch_data_t *td_pfd; |
fbeddd60 | 62 | boolean_t td_paused; |
e5fd1dd6 | 63 | uint64_t td_hole_birth_enabled_txg; |
b128c09f BB |
64 | blkptr_cb_t *td_func; |
65 | void *td_arg; | |
c352ec27 | 66 | boolean_t td_realloc_possible; |
572e2857 | 67 | } traverse_data_t; |
34dc7c2f | 68 | |
572e2857 | 69 | static int traverse_dnode(traverse_data_t *td, const dnode_phys_t *dnp, |
294f6806 | 70 | uint64_t objset, uint64_t object); |
96b89346 | 71 | static void prefetch_dnode_metadata(traverse_data_t *td, const dnode_phys_t *, |
294f6806 | 72 | uint64_t objset, uint64_t object); |
9babb374 | 73 | |
428870ff | 74 | static int |
34dc7c2f BB |
75 | traverse_zil_block(zilog_t *zilog, blkptr_t *bp, void *arg, uint64_t claim_txg) |
76 | { | |
572e2857 | 77 | traverse_data_t *td = arg; |
5dbd68a3 | 78 | zbookmark_phys_t zb; |
34dc7c2f | 79 | |
b0bc7a84 | 80 | if (BP_IS_HOLE(bp)) |
428870ff | 81 | return (0); |
34dc7c2f | 82 | |
b128c09f | 83 | if (claim_txg == 0 && bp->blk_birth >= spa_first_txg(td->td_spa)) |
428870ff BB |
84 | return (0); |
85 | ||
86 | SET_BOOKMARK(&zb, td->td_objset, ZB_ZIL_OBJECT, ZB_ZIL_LEVEL, | |
87 | bp->blk_cksum.zc_word[ZIL_ZC_SEQ]); | |
88 | ||
294f6806 | 89 | (void) td->td_func(td->td_spa, zilog, bp, &zb, NULL, td->td_arg); |
b128c09f | 90 | |
428870ff | 91 | return (0); |
34dc7c2f BB |
92 | } |
93 | ||
428870ff | 94 | static int |
34dc7c2f BB |
95 | traverse_zil_record(zilog_t *zilog, lr_t *lrc, void *arg, uint64_t claim_txg) |
96 | { | |
572e2857 | 97 | traverse_data_t *td = arg; |
34dc7c2f BB |
98 | |
99 | if (lrc->lrc_txtype == TX_WRITE) { | |
100 | lr_write_t *lr = (lr_write_t *)lrc; | |
101 | blkptr_t *bp = &lr->lr_blkptr; | |
5dbd68a3 | 102 | zbookmark_phys_t zb; |
34dc7c2f | 103 | |
b0bc7a84 | 104 | if (BP_IS_HOLE(bp)) |
428870ff | 105 | return (0); |
34dc7c2f | 106 | |
b128c09f | 107 | if (claim_txg == 0 || bp->blk_birth < claim_txg) |
428870ff | 108 | return (0); |
b128c09f | 109 | |
572e2857 BB |
110 | SET_BOOKMARK(&zb, td->td_objset, lr->lr_foid, |
111 | ZB_ZIL_LEVEL, lr->lr_offset / BP_GET_LSIZE(bp)); | |
428870ff | 112 | |
294f6806 | 113 | (void) td->td_func(td->td_spa, zilog, bp, &zb, NULL, |
428870ff | 114 | td->td_arg); |
34dc7c2f | 115 | } |
428870ff | 116 | return (0); |
34dc7c2f BB |
117 | } |
118 | ||
119 | static void | |
572e2857 | 120 | traverse_zil(traverse_data_t *td, zil_header_t *zh) |
34dc7c2f | 121 | { |
34dc7c2f BB |
122 | uint64_t claim_txg = zh->zh_claim_txg; |
123 | zilog_t *zilog; | |
124 | ||
34dc7c2f BB |
125 | /* |
126 | * We only want to visit blocks that have been claimed but not yet | |
428870ff | 127 | * replayed; plus, in read-only mode, blocks that are already stable. |
34dc7c2f | 128 | */ |
fb5f0bc8 | 129 | if (claim_txg == 0 && spa_writeable(td->td_spa)) |
34dc7c2f BB |
130 | return; |
131 | ||
b128c09f | 132 | zilog = zil_alloc(spa_get_dsl(td->td_spa)->dp_meta_objset, zh); |
34dc7c2f | 133 | |
b128c09f | 134 | (void) zil_parse(zilog, traverse_zil_block, traverse_zil_record, td, |
34dc7c2f BB |
135 | claim_txg); |
136 | ||
137 | zil_free(zilog); | |
138 | } | |
139 | ||
9ae529ec CS |
140 | typedef enum resume_skip { |
141 | RESUME_SKIP_ALL, | |
142 | RESUME_SKIP_NONE, | |
143 | RESUME_SKIP_CHILDREN | |
144 | } resume_skip_t; | |
145 | ||
146 | /* | |
147 | * Returns RESUME_SKIP_ALL if td indicates that we are resuming a traversal and | |
148 | * the block indicated by zb does not need to be visited at all. Returns | |
149 | * RESUME_SKIP_CHILDREN if we are resuming a post traversal and we reach the | |
150 | * resume point. This indicates that this block should be visited but not its | |
151 | * children (since they must have been visited in a previous traversal). | |
152 | * Otherwise returns RESUME_SKIP_NONE. | |
153 | */ | |
154 | static resume_skip_t | |
155 | resume_skip_check(traverse_data_t *td, const dnode_phys_t *dnp, | |
5dbd68a3 | 156 | const zbookmark_phys_t *zb) |
9ae529ec CS |
157 | { |
158 | if (td->td_resume != NULL && !ZB_IS_ZERO(td->td_resume)) { | |
159 | /* | |
160 | * If we already visited this bp & everything below, | |
161 | * don't bother doing it again. | |
162 | */ | |
fcff0f35 | 163 | if (zbookmark_subtree_completed(dnp, zb, td->td_resume)) |
9ae529ec CS |
164 | return (RESUME_SKIP_ALL); |
165 | ||
166 | /* | |
167 | * If we found the block we're trying to resume from, zero | |
168 | * the bookmark out to indicate that we have resumed. | |
169 | */ | |
9ae529ec CS |
170 | if (bcmp(zb, td->td_resume, sizeof (*zb)) == 0) { |
171 | bzero(td->td_resume, sizeof (*zb)); | |
172 | if (td->td_flags & TRAVERSE_POST) | |
173 | return (RESUME_SKIP_CHILDREN); | |
174 | } | |
175 | } | |
176 | return (RESUME_SKIP_NONE); | |
177 | } | |
178 | ||
96b89346 MA |
179 | static void |
180 | traverse_prefetch_metadata(traverse_data_t *td, | |
5dbd68a3 | 181 | const blkptr_t *bp, const zbookmark_phys_t *zb) |
96b89346 | 182 | { |
2a432414 | 183 | arc_flags_t flags = ARC_FLAG_NOWAIT | ARC_FLAG_PREFETCH; |
96b89346 MA |
184 | |
185 | if (!(td->td_flags & TRAVERSE_PREFETCH_METADATA)) | |
186 | return; | |
187 | /* | |
188 | * If we are in the process of resuming, don't prefetch, because | |
189 | * some children will not be needed (and in fact may have already | |
190 | * been freed). | |
191 | */ | |
192 | if (td->td_resume != NULL && !ZB_IS_ZERO(td->td_resume)) | |
193 | return; | |
194 | if (BP_IS_HOLE(bp) || bp->blk_birth <= td->td_min_txg) | |
195 | return; | |
196 | if (BP_GET_LEVEL(bp) == 0 && BP_GET_TYPE(bp) != DMU_OT_DNODE) | |
197 | return; | |
198 | ||
294f6806 GW |
199 | (void) arc_read(NULL, td->td_spa, bp, NULL, NULL, |
200 | ZIO_PRIORITY_ASYNC_READ, ZIO_FLAG_CANFAIL, &flags, zb); | |
96b89346 MA |
201 | } |
202 | ||
1fa8f795 MA |
203 | static boolean_t |
204 | prefetch_needed(prefetch_data_t *pfd, const blkptr_t *bp) | |
205 | { | |
206 | ASSERT(pfd->pd_flags & TRAVERSE_PREFETCH_DATA); | |
207 | if (BP_IS_HOLE(bp) || BP_IS_EMBEDDED(bp) || | |
208 | BP_GET_TYPE(bp) == DMU_OT_INTENT_LOG) | |
209 | return (B_FALSE); | |
210 | return (B_TRUE); | |
211 | } | |
212 | ||
c7f8f831 BB |
213 | static int |
214 | traverse_visitbp(traverse_data_t *td, const dnode_phys_t *dnp, | |
5dbd68a3 | 215 | const blkptr_t *bp, const zbookmark_phys_t *zb) |
6656bf56 | 216 | { |
fbeddd60 | 217 | int err = 0; |
c7f8f831 | 218 | arc_buf_t *buf = NULL; |
ee2f17aa | 219 | prefetch_data_t *pd = td->td_pfd; |
9ae529ec CS |
220 | |
221 | switch (resume_skip_check(td, dnp, zb)) { | |
222 | case RESUME_SKIP_ALL: | |
223 | return (0); | |
224 | case RESUME_SKIP_CHILDREN: | |
225 | goto post; | |
226 | case RESUME_SKIP_NONE: | |
227 | break; | |
228 | default: | |
229 | ASSERT(0); | |
230 | } | |
6656bf56 | 231 | |
b0bc7a84 | 232 | if (bp->blk_birth == 0) { |
e5fd1dd6 | 233 | /* |
c352ec27 PD |
234 | * Since this block has a birth time of 0 it must be one of |
235 | * two things: a hole created before the | |
236 | * SPA_FEATURE_HOLE_BIRTH feature was enabled, or a hole | |
237 | * which has always been a hole in an object. | |
238 | * | |
239 | * If a file is written sparsely, then the unwritten parts of | |
240 | * the file were "always holes" -- that is, they have been | |
241 | * holes since this object was allocated. However, we (and | |
242 | * our callers) can not necessarily tell when an object was | |
243 | * allocated. Therefore, if it's possible that this object | |
244 | * was freed and then its object number reused, we need to | |
245 | * visit all the holes with birth==0. | |
246 | * | |
247 | * If it isn't possible that the object number was reused, | |
248 | * then if SPA_FEATURE_HOLE_BIRTH was enabled before we wrote | |
249 | * all the blocks we will visit as part of this traversal, | |
250 | * then this hole must have always existed, so we can skip | |
251 | * it. We visit blocks born after (exclusive) td_min_txg. | |
252 | * | |
253 | * Note that the meta-dnode cannot be reallocated. | |
e5fd1dd6 | 254 | */ |
690fe647 BB |
255 | if (!send_holes_without_birth_time && |
256 | (!td->td_realloc_possible || | |
257 | zb->zb_object == DMU_META_DNODE_OBJECT) && | |
258 | td->td_hole_birth_enabled_txg <= td->td_min_txg) | |
e5fd1dd6 | 259 | return (0); |
b0bc7a84 MG |
260 | } else if (bp->blk_birth <= td->td_min_txg) { |
261 | return (0); | |
262 | } | |
263 | ||
ee2f17aa | 264 | if (pd != NULL && !pd->pd_exited && prefetch_needed(pd, bp)) { |
b738bc5a | 265 | uint64_t size = BP_GET_LSIZE(bp); |
ee2f17aa | 266 | mutex_enter(&pd->pd_mtx); |
b738bc5a GW |
267 | ASSERT(pd->pd_bytes_fetched >= 0); |
268 | while (pd->pd_bytes_fetched < size && !pd->pd_exited) | |
8e70975f | 269 | cv_wait_sig(&pd->pd_cv, &pd->pd_mtx); |
b738bc5a | 270 | pd->pd_bytes_fetched -= size; |
ee2f17aa CD |
271 | cv_broadcast(&pd->pd_cv); |
272 | mutex_exit(&pd->pd_mtx); | |
34dc7c2f BB |
273 | } |
274 | ||
1fa8f795 MA |
275 | if (BP_IS_HOLE(bp)) { |
276 | err = td->td_func(td->td_spa, NULL, bp, zb, dnp, td->td_arg); | |
277 | if (err != 0) | |
278 | goto post; | |
279 | return (0); | |
280 | } | |
281 | ||
c7f8f831 | 282 | if (td->td_flags & TRAVERSE_PRE) { |
294f6806 | 283 | err = td->td_func(td->td_spa, NULL, bp, zb, dnp, |
c7f8f831 BB |
284 | td->td_arg); |
285 | if (err == TRAVERSE_VISIT_NO_CHILDREN) | |
572e2857 | 286 | return (0); |
9ae529ec CS |
287 | if (err != 0) |
288 | goto post; | |
34dc7c2f BB |
289 | } |
290 | ||
c7f8f831 | 291 | if (BP_GET_LEVEL(bp) > 0) { |
2a432414 | 292 | uint32_t flags = ARC_FLAG_WAIT; |
a1687880 BB |
293 | int32_t i; |
294 | int32_t epb = BP_GET_LSIZE(bp) >> SPA_BLKPTRSHIFT; | |
5dbd68a3 | 295 | zbookmark_phys_t *czb; |
b128c09f | 296 | |
294f6806 | 297 | err = arc_read(NULL, td->td_spa, bp, arc_getbuf_func, &buf, |
c7f8f831 | 298 | ZIO_PRIORITY_ASYNC_READ, ZIO_FLAG_CANFAIL, &flags, zb); |
13fe0198 | 299 | if (err != 0) |
fbeddd60 | 300 | goto post; |
a1687880 | 301 | |
79c76d5b | 302 | czb = kmem_alloc(sizeof (zbookmark_phys_t), KM_SLEEP); |
96b89346 MA |
303 | |
304 | for (i = 0; i < epb; i++) { | |
a1687880 | 305 | SET_BOOKMARK(czb, zb->zb_objset, zb->zb_object, |
96b89346 MA |
306 | zb->zb_level - 1, |
307 | zb->zb_blkid * epb + i); | |
a1687880 BB |
308 | traverse_prefetch_metadata(td, |
309 | &((blkptr_t *)buf->b_data)[i], czb); | |
96b89346 | 310 | } |
b128c09f BB |
311 | |
312 | /* recursively visitbp() blocks below this */ | |
96b89346 | 313 | for (i = 0; i < epb; i++) { |
a1687880 | 314 | SET_BOOKMARK(czb, zb->zb_objset, zb->zb_object, |
c7f8f831 BB |
315 | zb->zb_level - 1, |
316 | zb->zb_blkid * epb + i); | |
a1687880 BB |
317 | err = traverse_visitbp(td, dnp, |
318 | &((blkptr_t *)buf->b_data)[i], czb); | |
fbeddd60 MA |
319 | if (err != 0) |
320 | break; | |
b128c09f | 321 | } |
a1687880 | 322 | |
5dbd68a3 | 323 | kmem_free(czb, sizeof (zbookmark_phys_t)); |
a1687880 | 324 | |
c7f8f831 | 325 | } else if (BP_GET_TYPE(bp) == DMU_OT_DNODE) { |
2a432414 | 326 | uint32_t flags = ARC_FLAG_WAIT; |
a1687880 BB |
327 | int32_t i; |
328 | int32_t epb = BP_GET_LSIZE(bp) >> DNODE_SHIFT; | |
47dfff3b | 329 | dnode_phys_t *child_dnp; |
b128c09f | 330 | |
294f6806 | 331 | err = arc_read(NULL, td->td_spa, bp, arc_getbuf_func, &buf, |
c7f8f831 | 332 | ZIO_PRIORITY_ASYNC_READ, ZIO_FLAG_CANFAIL, &flags, zb); |
13fe0198 | 333 | if (err != 0) |
fbeddd60 | 334 | goto post; |
47dfff3b | 335 | child_dnp = buf->b_data; |
96b89346 | 336 | |
47dfff3b MA |
337 | for (i = 0; i < epb; i += child_dnp[i].dn_extra_slots + 1) { |
338 | prefetch_dnode_metadata(td, &child_dnp[i], | |
339 | zb->zb_objset, zb->zb_blkid * epb + i); | |
96b89346 | 340 | } |
b128c09f BB |
341 | |
342 | /* recursively visitbp() blocks below this */ | |
47dfff3b MA |
343 | for (i = 0; i < epb; i += child_dnp[i].dn_extra_slots + 1) { |
344 | err = traverse_dnode(td, &child_dnp[i], | |
345 | zb->zb_objset, zb->zb_blkid * epb + i); | |
fbeddd60 MA |
346 | if (err != 0) |
347 | break; | |
34dc7c2f | 348 | } |
c7f8f831 | 349 | } else if (BP_GET_TYPE(bp) == DMU_OT_OBJSET) { |
2a432414 | 350 | arc_flags_t flags = ARC_FLAG_WAIT; |
c7f8f831 | 351 | objset_phys_t *osp; |
c7f8f831 | 352 | |
294f6806 | 353 | err = arc_read(NULL, td->td_spa, bp, arc_getbuf_func, &buf, |
c7f8f831 | 354 | ZIO_PRIORITY_ASYNC_READ, ZIO_FLAG_CANFAIL, &flags, zb); |
13fe0198 | 355 | if (err != 0) |
fbeddd60 | 356 | goto post; |
c7f8f831 BB |
357 | |
358 | osp = buf->b_data; | |
47dfff3b | 359 | prefetch_dnode_metadata(td, &osp->os_meta_dnode, zb->zb_objset, |
96b89346 | 360 | DMU_META_DNODE_OBJECT); |
c352ec27 PD |
361 | /* |
362 | * See the block comment above for the goal of this variable. | |
363 | * If the maxblkid of the meta-dnode is 0, then we know that | |
364 | * we've never had more than DNODES_PER_BLOCK objects in the | |
365 | * dataset, which means we can't have reused any object ids. | |
366 | */ | |
367 | if (osp->os_meta_dnode.dn_maxblkid == 0) | |
368 | td->td_realloc_possible = B_FALSE; | |
369 | ||
96b89346 | 370 | if (arc_buf_size(buf) >= sizeof (objset_phys_t)) { |
47dfff3b MA |
371 | prefetch_dnode_metadata(td, &osp->os_groupused_dnode, |
372 | zb->zb_objset, DMU_GROUPUSED_OBJECT); | |
373 | prefetch_dnode_metadata(td, &osp->os_userused_dnode, | |
374 | zb->zb_objset, DMU_USERUSED_OBJECT); | |
96b89346 MA |
375 | } |
376 | ||
47dfff3b | 377 | err = traverse_dnode(td, &osp->os_meta_dnode, zb->zb_objset, |
c7f8f831 | 378 | DMU_META_DNODE_OBJECT); |
c7f8f831 | 379 | if (err == 0 && arc_buf_size(buf) >= sizeof (objset_phys_t)) { |
47dfff3b MA |
380 | err = traverse_dnode(td, &osp->os_groupused_dnode, |
381 | zb->zb_objset, DMU_GROUPUSED_OBJECT); | |
9babb374 | 382 | } |
c7f8f831 | 383 | if (err == 0 && arc_buf_size(buf) >= sizeof (objset_phys_t)) { |
47dfff3b MA |
384 | err = traverse_dnode(td, &osp->os_userused_dnode, |
385 | zb->zb_objset, DMU_USERUSED_OBJECT); | |
34dc7c2f | 386 | } |
34dc7c2f BB |
387 | } |
388 | ||
c7f8f831 | 389 | if (buf) |
d3c2ae1c | 390 | arc_buf_destroy(buf, &buf); |
34dc7c2f | 391 | |
9ae529ec | 392 | post: |
fbeddd60 | 393 | if (err == 0 && (td->td_flags & TRAVERSE_POST)) |
294f6806 | 394 | err = td->td_func(td->td_spa, NULL, bp, zb, dnp, td->td_arg); |
fbeddd60 MA |
395 | |
396 | if ((td->td_flags & TRAVERSE_HARD) && (err == EIO || err == ECKSUM)) { | |
397 | /* | |
398 | * Ignore this disk error as requested by the HARD flag, | |
399 | * and continue traversal. | |
400 | */ | |
401 | err = 0; | |
9ae529ec CS |
402 | } |
403 | ||
fbeddd60 MA |
404 | /* |
405 | * If we are stopping here, set td_resume. | |
406 | */ | |
407 | if (td->td_resume != NULL && err != 0 && !td->td_paused) { | |
408 | td->td_resume->zb_objset = zb->zb_objset; | |
409 | td->td_resume->zb_object = zb->zb_object; | |
410 | td->td_resume->zb_level = 0; | |
411 | /* | |
412 | * If we have stopped on an indirect block (e.g. due to | |
413 | * i/o error), we have not visited anything below it. | |
414 | * Set the bookmark to the first level-0 block that we need | |
415 | * to visit. This way, the resuming code does not need to | |
416 | * deal with resuming from indirect blocks. | |
47dfff3b MA |
417 | * |
418 | * Note, if zb_level <= 0, dnp may be NULL, so we don't want | |
419 | * to dereference it. | |
fbeddd60 | 420 | */ |
47dfff3b MA |
421 | td->td_resume->zb_blkid = zb->zb_blkid; |
422 | if (zb->zb_level > 0) { | |
423 | td->td_resume->zb_blkid <<= zb->zb_level * | |
424 | (dnp->dn_indblkshift - SPA_BLKPTRSHIFT); | |
425 | } | |
fbeddd60 | 426 | td->td_paused = B_TRUE; |
428870ff | 427 | } |
34dc7c2f | 428 | |
fbeddd60 | 429 | return (err); |
34dc7c2f BB |
430 | } |
431 | ||
96b89346 MA |
432 | static void |
433 | prefetch_dnode_metadata(traverse_data_t *td, const dnode_phys_t *dnp, | |
294f6806 | 434 | uint64_t objset, uint64_t object) |
96b89346 MA |
435 | { |
436 | int j; | |
5dbd68a3 | 437 | zbookmark_phys_t czb; |
96b89346 MA |
438 | |
439 | for (j = 0; j < dnp->dn_nblkptr; j++) { | |
440 | SET_BOOKMARK(&czb, objset, object, dnp->dn_nlevels - 1, j); | |
294f6806 | 441 | traverse_prefetch_metadata(td, &dnp->dn_blkptr[j], &czb); |
96b89346 MA |
442 | } |
443 | ||
444 | if (dnp->dn_flags & DNODE_FLAG_SPILL_BLKPTR) { | |
445 | SET_BOOKMARK(&czb, objset, object, 0, DMU_SPILL_BLKID); | |
50c957f7 | 446 | traverse_prefetch_metadata(td, DN_SPILL_BLKPTR(dnp), &czb); |
96b89346 MA |
447 | } |
448 | } | |
449 | ||
9babb374 | 450 | static int |
572e2857 | 451 | traverse_dnode(traverse_data_t *td, const dnode_phys_t *dnp, |
294f6806 | 452 | uint64_t objset, uint64_t object) |
9babb374 | 453 | { |
fbeddd60 | 454 | int j, err = 0; |
5dbd68a3 | 455 | zbookmark_phys_t czb; |
9babb374 | 456 | |
47dfff3b MA |
457 | if (object != DMU_META_DNODE_OBJECT && td->td_resume != NULL && |
458 | object < td->td_resume->zb_object) | |
459 | return (0); | |
460 | ||
fcff0f35 PD |
461 | if (td->td_flags & TRAVERSE_PRE) { |
462 | SET_BOOKMARK(&czb, objset, object, ZB_DNODE_LEVEL, | |
463 | ZB_DNODE_BLKID); | |
464 | err = td->td_func(td->td_spa, NULL, NULL, &czb, dnp, | |
465 | td->td_arg); | |
466 | if (err == TRAVERSE_VISIT_NO_CHILDREN) | |
467 | return (0); | |
468 | if (err != 0) | |
469 | return (err); | |
470 | } | |
471 | ||
9babb374 BB |
472 | for (j = 0; j < dnp->dn_nblkptr; j++) { |
473 | SET_BOOKMARK(&czb, objset, object, dnp->dn_nlevels - 1, j); | |
294f6806 | 474 | err = traverse_visitbp(td, dnp, &dnp->dn_blkptr[j], &czb); |
fbeddd60 MA |
475 | if (err != 0) |
476 | break; | |
9babb374 | 477 | } |
428870ff | 478 | |
fcff0f35 | 479 | if (err == 0 && (dnp->dn_flags & DNODE_FLAG_SPILL_BLKPTR)) { |
96b89346 | 480 | SET_BOOKMARK(&czb, objset, object, 0, DMU_SPILL_BLKID); |
50c957f7 | 481 | err = traverse_visitbp(td, dnp, DN_SPILL_BLKPTR(dnp), &czb); |
428870ff | 482 | } |
fcff0f35 PD |
483 | |
484 | if (err == 0 && (td->td_flags & TRAVERSE_POST)) { | |
485 | SET_BOOKMARK(&czb, objset, object, ZB_DNODE_LEVEL, | |
486 | ZB_DNODE_BLKID); | |
487 | err = td->td_func(td->td_spa, NULL, NULL, &czb, dnp, | |
488 | td->td_arg); | |
489 | if (err == TRAVERSE_VISIT_NO_CHILDREN) | |
490 | return (0); | |
491 | if (err != 0) | |
492 | return (err); | |
493 | } | |
fbeddd60 | 494 | return (err); |
9babb374 BB |
495 | } |
496 | ||
b128c09f BB |
497 | /* ARGSUSED */ |
498 | static int | |
428870ff | 499 | traverse_prefetcher(spa_t *spa, zilog_t *zilog, const blkptr_t *bp, |
5dbd68a3 | 500 | const zbookmark_phys_t *zb, const dnode_phys_t *dnp, void *arg) |
34dc7c2f | 501 | { |
572e2857 | 502 | prefetch_data_t *pfd = arg; |
2a432414 | 503 | arc_flags_t aflags = ARC_FLAG_NOWAIT | ARC_FLAG_PREFETCH; |
34dc7c2f | 504 | |
b738bc5a | 505 | ASSERT(pfd->pd_bytes_fetched >= 0); |
fcff0f35 PD |
506 | if (bp == NULL) |
507 | return (0); | |
b128c09f | 508 | if (pfd->pd_cancel) |
2e528b49 | 509 | return (SET_ERROR(EINTR)); |
34dc7c2f | 510 | |
1fa8f795 | 511 | if (!prefetch_needed(pfd, bp)) |
34dc7c2f BB |
512 | return (0); |
513 | ||
b128c09f | 514 | mutex_enter(&pfd->pd_mtx); |
b738bc5a | 515 | while (!pfd->pd_cancel && pfd->pd_bytes_fetched >= zfs_pd_bytes_max) |
8e70975f | 516 | cv_wait_sig(&pfd->pd_cv, &pfd->pd_mtx); |
b738bc5a | 517 | pfd->pd_bytes_fetched += BP_GET_LSIZE(bp); |
b128c09f BB |
518 | cv_broadcast(&pfd->pd_cv); |
519 | mutex_exit(&pfd->pd_mtx); | |
34dc7c2f | 520 | |
294f6806 GW |
521 | (void) arc_read(NULL, spa, bp, NULL, NULL, ZIO_PRIORITY_ASYNC_READ, |
522 | ZIO_FLAG_CANFAIL | ZIO_FLAG_SPECULATIVE, &aflags, zb); | |
34dc7c2f | 523 | |
b128c09f | 524 | return (0); |
34dc7c2f BB |
525 | } |
526 | ||
34dc7c2f | 527 | static void |
b128c09f | 528 | traverse_prefetch_thread(void *arg) |
34dc7c2f | 529 | { |
572e2857 BB |
530 | traverse_data_t *td_main = arg; |
531 | traverse_data_t td = *td_main; | |
5dbd68a3 | 532 | zbookmark_phys_t czb; |
dca8c34d | 533 | fstrans_cookie_t cookie = spl_fstrans_mark(); |
34dc7c2f | 534 | |
b128c09f BB |
535 | td.td_func = traverse_prefetcher; |
536 | td.td_arg = td_main->td_pfd; | |
537 | td.td_pfd = NULL; | |
47dfff3b | 538 | td.td_resume = &td_main->td_pfd->pd_resume; |
34dc7c2f | 539 | |
428870ff BB |
540 | SET_BOOKMARK(&czb, td.td_objset, |
541 | ZB_ROOT_OBJECT, ZB_ROOT_LEVEL, ZB_ROOT_BLKID); | |
294f6806 | 542 | (void) traverse_visitbp(&td, NULL, td.td_rootbp, &czb); |
34dc7c2f | 543 | |
b128c09f BB |
544 | mutex_enter(&td_main->td_pfd->pd_mtx); |
545 | td_main->td_pfd->pd_exited = B_TRUE; | |
546 | cv_broadcast(&td_main->td_pfd->pd_cv); | |
547 | mutex_exit(&td_main->td_pfd->pd_mtx); | |
dca8c34d | 548 | spl_fstrans_unmark(cookie); |
34dc7c2f BB |
549 | } |
550 | ||
b128c09f BB |
551 | /* |
552 | * NB: dataset must not be changing on-disk (eg, is a snapshot or we are | |
553 | * in syncing context). | |
554 | */ | |
555 | static int | |
9ae529ec | 556 | traverse_impl(spa_t *spa, dsl_dataset_t *ds, uint64_t objset, blkptr_t *rootbp, |
5dbd68a3 | 557 | uint64_t txg_start, zbookmark_phys_t *resume, int flags, |
9ae529ec | 558 | blkptr_cb_t func, void *arg) |
34dc7c2f | 559 | { |
47050a88 BB |
560 | traverse_data_t *td; |
561 | prefetch_data_t *pd; | |
5dbd68a3 | 562 | zbookmark_phys_t *czb; |
b128c09f | 563 | int err; |
34dc7c2f | 564 | |
9ae529ec CS |
565 | ASSERT(ds == NULL || objset == ds->ds_object); |
566 | ASSERT(!(flags & TRAVERSE_PRE) || !(flags & TRAVERSE_POST)); | |
567 | ||
79c76d5b BB |
568 | td = kmem_alloc(sizeof (traverse_data_t), KM_SLEEP); |
569 | pd = kmem_zalloc(sizeof (prefetch_data_t), KM_SLEEP); | |
570 | czb = kmem_alloc(sizeof (zbookmark_phys_t), KM_SLEEP); | |
47050a88 BB |
571 | |
572 | td->td_spa = spa; | |
9ae529ec | 573 | td->td_objset = objset; |
47050a88 BB |
574 | td->td_rootbp = rootbp; |
575 | td->td_min_txg = txg_start; | |
9ae529ec | 576 | td->td_resume = resume; |
47050a88 BB |
577 | td->td_func = func; |
578 | td->td_arg = arg; | |
579 | td->td_pfd = pd; | |
580 | td->td_flags = flags; | |
fbeddd60 | 581 | td->td_paused = B_FALSE; |
c352ec27 | 582 | td->td_realloc_possible = (txg_start == 0 ? B_FALSE : B_TRUE); |
b128c09f | 583 | |
e5fd1dd6 MA |
584 | if (spa_feature_is_active(spa, SPA_FEATURE_HOLE_BIRTH)) { |
585 | VERIFY(spa_feature_enabled_txg(spa, | |
586 | SPA_FEATURE_HOLE_BIRTH, &td->td_hole_birth_enabled_txg)); | |
587 | } else { | |
c352ec27 | 588 | td->td_hole_birth_enabled_txg = UINT64_MAX; |
e5fd1dd6 MA |
589 | } |
590 | ||
47050a88 | 591 | pd->pd_flags = flags; |
47dfff3b MA |
592 | if (resume != NULL) |
593 | pd->pd_resume = *resume; | |
47050a88 BB |
594 | mutex_init(&pd->pd_mtx, NULL, MUTEX_DEFAULT, NULL); |
595 | cv_init(&pd->pd_cv, NULL, CV_DEFAULT, NULL); | |
b128c09f | 596 | |
1421c891 PS |
597 | SET_BOOKMARK(czb, td->td_objset, |
598 | ZB_ROOT_OBJECT, ZB_ROOT_LEVEL, ZB_ROOT_BLKID); | |
599 | ||
572e2857 | 600 | /* See comment on ZIL traversal in dsl_scan_visitds. */ |
0c66c32d | 601 | if (ds != NULL && !ds->ds_is_snapshot && !BP_IS_HOLE(rootbp)) { |
2a432414 | 602 | uint32_t flags = ARC_FLAG_WAIT; |
13fe0198 MA |
603 | objset_phys_t *osp; |
604 | arc_buf_t *buf; | |
572e2857 | 605 | |
13fe0198 MA |
606 | err = arc_read(NULL, td->td_spa, rootbp, |
607 | arc_getbuf_func, &buf, | |
1421c891 | 608 | ZIO_PRIORITY_ASYNC_READ, ZIO_FLAG_CANFAIL, &flags, czb); |
13fe0198 | 609 | if (err != 0) |
572e2857 BB |
610 | return (err); |
611 | ||
13fe0198 MA |
612 | osp = buf->b_data; |
613 | traverse_zil(td, &osp->os_zil_header); | |
d3c2ae1c | 614 | arc_buf_destroy(buf, &buf); |
572e2857 BB |
615 | } |
616 | ||
96b89346 | 617 | if (!(flags & TRAVERSE_PREFETCH_DATA) || |
b128c09f | 618 | 0 == taskq_dispatch(system_taskq, traverse_prefetch_thread, |
47050a88 BB |
619 | td, TQ_NOQUEUE)) |
620 | pd->pd_exited = B_TRUE; | |
b128c09f | 621 | |
294f6806 | 622 | err = traverse_visitbp(td, NULL, rootbp, czb); |
47050a88 BB |
623 | |
624 | mutex_enter(&pd->pd_mtx); | |
625 | pd->pd_cancel = B_TRUE; | |
626 | cv_broadcast(&pd->pd_cv); | |
627 | while (!pd->pd_exited) | |
8e70975f | 628 | cv_wait_sig(&pd->pd_cv, &pd->pd_mtx); |
47050a88 | 629 | mutex_exit(&pd->pd_mtx); |
b128c09f | 630 | |
47050a88 BB |
631 | mutex_destroy(&pd->pd_mtx); |
632 | cv_destroy(&pd->pd_cv); | |
b128c09f | 633 | |
5dbd68a3 | 634 | kmem_free(czb, sizeof (zbookmark_phys_t)); |
a1687880 BB |
635 | kmem_free(pd, sizeof (struct prefetch_data)); |
636 | kmem_free(td, sizeof (struct traverse_data)); | |
34dc7c2f | 637 | |
b128c09f | 638 | return (err); |
34dc7c2f BB |
639 | } |
640 | ||
b128c09f BB |
641 | /* |
642 | * NB: dataset must not be changing on-disk (eg, is a snapshot or we are | |
643 | * in syncing context). | |
644 | */ | |
645 | int | |
47dfff3b MA |
646 | traverse_dataset_resume(dsl_dataset_t *ds, uint64_t txg_start, |
647 | zbookmark_phys_t *resume, | |
648 | int flags, blkptr_cb_t func, void *arg) | |
34dc7c2f | 649 | { |
9ae529ec | 650 | return (traverse_impl(ds->ds_dir->dd_pool->dp_spa, ds, ds->ds_object, |
47dfff3b MA |
651 | &dsl_dataset_phys(ds)->ds_bp, txg_start, resume, flags, func, arg)); |
652 | } | |
653 | ||
654 | int | |
655 | traverse_dataset(dsl_dataset_t *ds, uint64_t txg_start, | |
656 | int flags, blkptr_cb_t func, void *arg) | |
657 | { | |
658 | return (traverse_dataset_resume(ds, txg_start, NULL, flags, func, arg)); | |
9ae529ec CS |
659 | } |
660 | ||
661 | int | |
662 | traverse_dataset_destroyed(spa_t *spa, blkptr_t *blkptr, | |
5dbd68a3 | 663 | uint64_t txg_start, zbookmark_phys_t *resume, int flags, |
9ae529ec CS |
664 | blkptr_cb_t func, void *arg) |
665 | { | |
666 | return (traverse_impl(spa, NULL, ZB_DESTROYED_OBJSET, | |
667 | blkptr, txg_start, resume, flags, func, arg)); | |
34dc7c2f BB |
668 | } |
669 | ||
b128c09f BB |
670 | /* |
671 | * NB: pool must not be changing on-disk (eg, from zdb or sync context). | |
672 | */ | |
673 | int | |
428870ff BB |
674 | traverse_pool(spa_t *spa, uint64_t txg_start, int flags, |
675 | blkptr_cb_t func, void *arg) | |
34dc7c2f | 676 | { |
fbeddd60 | 677 | int err; |
b128c09f BB |
678 | uint64_t obj; |
679 | dsl_pool_t *dp = spa_get_dsl(spa); | |
680 | objset_t *mos = dp->dp_meta_objset; | |
428870ff | 681 | boolean_t hard = (flags & TRAVERSE_HARD); |
b128c09f BB |
682 | |
683 | /* visit the MOS */ | |
9ae529ec CS |
684 | err = traverse_impl(spa, NULL, 0, spa_get_rootblkptr(spa), |
685 | txg_start, NULL, flags, func, arg); | |
13fe0198 | 686 | if (err != 0) |
b128c09f BB |
687 | return (err); |
688 | ||
689 | /* visit each dataset */ | |
fbeddd60 | 690 | for (obj = 1; err == 0; |
47dfff3b | 691 | err = dmu_object_next(mos, &obj, B_FALSE, txg_start)) { |
b128c09f BB |
692 | dmu_object_info_t doi; |
693 | ||
694 | err = dmu_object_info(mos, obj, &doi); | |
13fe0198 | 695 | if (err != 0) { |
fbeddd60 MA |
696 | if (hard) |
697 | continue; | |
698 | break; | |
428870ff | 699 | } |
b128c09f | 700 | |
fa86b5db | 701 | if (doi.doi_bonus_type == DMU_OT_DSL_DATASET) { |
b128c09f | 702 | dsl_dataset_t *ds; |
428870ff BB |
703 | uint64_t txg = txg_start; |
704 | ||
13fe0198 | 705 | dsl_pool_config_enter(dp, FTAG); |
b128c09f | 706 | err = dsl_dataset_hold_obj(dp, obj, FTAG, &ds); |
13fe0198 MA |
707 | dsl_pool_config_exit(dp, FTAG); |
708 | if (err != 0) { | |
fbeddd60 MA |
709 | if (hard) |
710 | continue; | |
711 | break; | |
428870ff | 712 | } |
d683ddbb JG |
713 | if (dsl_dataset_phys(ds)->ds_prev_snap_txg > txg) |
714 | txg = dsl_dataset_phys(ds)->ds_prev_snap_txg; | |
428870ff | 715 | err = traverse_dataset(ds, txg, flags, func, arg); |
b128c09f | 716 | dsl_dataset_rele(ds, FTAG); |
fbeddd60 MA |
717 | if (err != 0) |
718 | break; | |
b128c09f | 719 | } |
34dc7c2f | 720 | } |
b128c09f BB |
721 | if (err == ESRCH) |
722 | err = 0; | |
fbeddd60 | 723 | return (err); |
34dc7c2f | 724 | } |
c28b2279 BB |
725 | |
726 | #if defined(_KERNEL) && defined(HAVE_SPL) | |
727 | EXPORT_SYMBOL(traverse_dataset); | |
728 | EXPORT_SYMBOL(traverse_pool); | |
c409e464 | 729 | |
b738bc5a GW |
730 | module_param(zfs_pd_bytes_max, int, 0644); |
731 | MODULE_PARM_DESC(zfs_pd_bytes_max, "Max number of bytes to prefetch"); | |
6d836e6f | 732 | |
690fe647 BB |
733 | module_param_named(ignore_hole_birth, send_holes_without_birth_time, int, 0644); |
734 | MODULE_PARM_DESC(ignore_hole_birth, "Alias for send_holes_without_birth_time"); | |
735 | ||
736 | module_param_named(send_holes_without_birth_time, | |
737 | send_holes_without_birth_time, int, 0644); | |
738 | MODULE_PARM_DESC(send_holes_without_birth_time, | |
739 | "Ignore hole_birth txg for zfs send"); | |
c28b2279 | 740 | #endif |