1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3 * Copyright (C) 2016 Oracle. All Rights Reserved.
4 * Author: Darrick J. Wong <darrick.wong@oracle.com>
5 */
6 #include "xfs.h"
7 #include "xfs_fs.h"
8 #include "xfs_format.h"
9 #include "xfs_log_format.h"
10 #include "xfs_trans_resv.h"
11 #include "xfs_bit.h"
12 #include "xfs_shared.h"
13 #include "xfs_mount.h"
14 #include "xfs_defer.h"
15 #include "xfs_inode.h"
16 #include "xfs_trans.h"
17 #include "xfs_trans_priv.h"
18 #include "xfs_bmap_item.h"
19 #include "xfs_log.h"
20 #include "xfs_bmap.h"
21 #include "xfs_icache.h"
22 #include "xfs_bmap_btree.h"
23 #include "xfs_trans_space.h"
24 #include "xfs_error.h"
25 #include "xfs_log_priv.h"
26 #include "xfs_log_recover.h"
27 #include "xfs_ag.h"
28
29 struct kmem_cache *xfs_bui_cache;
30 struct kmem_cache *xfs_bud_cache;
31
32 static const struct xfs_item_ops xfs_bui_item_ops;
33
BUI_ITEM(struct xfs_log_item * lip)34 static inline struct xfs_bui_log_item *BUI_ITEM(struct xfs_log_item *lip)
35 {
36 return container_of(lip, struct xfs_bui_log_item, bui_item);
37 }
38
39 STATIC void
xfs_bui_item_free(struct xfs_bui_log_item * buip)40 xfs_bui_item_free(
41 struct xfs_bui_log_item *buip)
42 {
43 kmem_free(buip->bui_item.li_lv_shadow);
44 kmem_cache_free(xfs_bui_cache, buip);
45 }
46
47 /*
48 * Freeing the BUI requires that we remove it from the AIL if it has already
49 * been placed there. However, the BUI may not yet have been placed in the AIL
50 * when called by xfs_bui_release() from BUD processing due to the ordering of
51 * committed vs unpin operations in bulk insert operations. Hence the reference
52 * count to ensure only the last caller frees the BUI.
53 */
54 STATIC void
xfs_bui_release(struct xfs_bui_log_item * buip)55 xfs_bui_release(
56 struct xfs_bui_log_item *buip)
57 {
58 ASSERT(atomic_read(&buip->bui_refcount) > 0);
59 if (!atomic_dec_and_test(&buip->bui_refcount))
60 return;
61
62 xfs_trans_ail_delete(&buip->bui_item, 0);
63 xfs_bui_item_free(buip);
64 }
65
66
67 STATIC void
xfs_bui_item_size(struct xfs_log_item * lip,int * nvecs,int * nbytes)68 xfs_bui_item_size(
69 struct xfs_log_item *lip,
70 int *nvecs,
71 int *nbytes)
72 {
73 struct xfs_bui_log_item *buip = BUI_ITEM(lip);
74
75 *nvecs += 1;
76 *nbytes += xfs_bui_log_format_sizeof(buip->bui_format.bui_nextents);
77 }
78
79 /*
80 * This is called to fill in the vector of log iovecs for the
81 * given bui log item. We use only 1 iovec, and we point that
82 * at the bui_log_format structure embedded in the bui item.
83 * It is at this point that we assert that all of the extent
84 * slots in the bui item have been filled.
85 */
86 STATIC void
xfs_bui_item_format(struct xfs_log_item * lip,struct xfs_log_vec * lv)87 xfs_bui_item_format(
88 struct xfs_log_item *lip,
89 struct xfs_log_vec *lv)
90 {
91 struct xfs_bui_log_item *buip = BUI_ITEM(lip);
92 struct xfs_log_iovec *vecp = NULL;
93
94 ASSERT(atomic_read(&buip->bui_next_extent) ==
95 buip->bui_format.bui_nextents);
96
97 buip->bui_format.bui_type = XFS_LI_BUI;
98 buip->bui_format.bui_size = 1;
99
100 xlog_copy_iovec(lv, &vecp, XLOG_REG_TYPE_BUI_FORMAT, &buip->bui_format,
101 xfs_bui_log_format_sizeof(buip->bui_format.bui_nextents));
102 }
103
104 /*
105 * The unpin operation is the last place an BUI is manipulated in the log. It is
106 * either inserted in the AIL or aborted in the event of a log I/O error. In
107 * either case, the BUI transaction has been successfully committed to make it
108 * this far. Therefore, we expect whoever committed the BUI to either construct
109 * and commit the BUD or drop the BUD's reference in the event of error. Simply
110 * drop the log's BUI reference now that the log is done with it.
111 */
112 STATIC void
xfs_bui_item_unpin(struct xfs_log_item * lip,int remove)113 xfs_bui_item_unpin(
114 struct xfs_log_item *lip,
115 int remove)
116 {
117 struct xfs_bui_log_item *buip = BUI_ITEM(lip);
118
119 xfs_bui_release(buip);
120 }
121
122 /*
123 * The BUI has been either committed or aborted if the transaction has been
124 * cancelled. If the transaction was cancelled, an BUD isn't going to be
125 * constructed and thus we free the BUI here directly.
126 */
127 STATIC void
xfs_bui_item_release(struct xfs_log_item * lip)128 xfs_bui_item_release(
129 struct xfs_log_item *lip)
130 {
131 xfs_bui_release(BUI_ITEM(lip));
132 }
133
134 /*
135 * Allocate and initialize an bui item with the given number of extents.
136 */
137 STATIC struct xfs_bui_log_item *
xfs_bui_init(struct xfs_mount * mp)138 xfs_bui_init(
139 struct xfs_mount *mp)
140
141 {
142 struct xfs_bui_log_item *buip;
143
144 buip = kmem_cache_zalloc(xfs_bui_cache, GFP_KERNEL | __GFP_NOFAIL);
145
146 xfs_log_item_init(mp, &buip->bui_item, XFS_LI_BUI, &xfs_bui_item_ops);
147 buip->bui_format.bui_nextents = XFS_BUI_MAX_FAST_EXTENTS;
148 buip->bui_format.bui_id = (uintptr_t)(void *)buip;
149 atomic_set(&buip->bui_next_extent, 0);
150 atomic_set(&buip->bui_refcount, 2);
151
152 return buip;
153 }
154
BUD_ITEM(struct xfs_log_item * lip)155 static inline struct xfs_bud_log_item *BUD_ITEM(struct xfs_log_item *lip)
156 {
157 return container_of(lip, struct xfs_bud_log_item, bud_item);
158 }
159
160 STATIC void
xfs_bud_item_size(struct xfs_log_item * lip,int * nvecs,int * nbytes)161 xfs_bud_item_size(
162 struct xfs_log_item *lip,
163 int *nvecs,
164 int *nbytes)
165 {
166 *nvecs += 1;
167 *nbytes += sizeof(struct xfs_bud_log_format);
168 }
169
170 /*
171 * This is called to fill in the vector of log iovecs for the
172 * given bud log item. We use only 1 iovec, and we point that
173 * at the bud_log_format structure embedded in the bud item.
174 * It is at this point that we assert that all of the extent
175 * slots in the bud item have been filled.
176 */
177 STATIC void
xfs_bud_item_format(struct xfs_log_item * lip,struct xfs_log_vec * lv)178 xfs_bud_item_format(
179 struct xfs_log_item *lip,
180 struct xfs_log_vec *lv)
181 {
182 struct xfs_bud_log_item *budp = BUD_ITEM(lip);
183 struct xfs_log_iovec *vecp = NULL;
184
185 budp->bud_format.bud_type = XFS_LI_BUD;
186 budp->bud_format.bud_size = 1;
187
188 xlog_copy_iovec(lv, &vecp, XLOG_REG_TYPE_BUD_FORMAT, &budp->bud_format,
189 sizeof(struct xfs_bud_log_format));
190 }
191
192 /*
193 * The BUD is either committed or aborted if the transaction is cancelled. If
194 * the transaction is cancelled, drop our reference to the BUI and free the
195 * BUD.
196 */
197 STATIC void
xfs_bud_item_release(struct xfs_log_item * lip)198 xfs_bud_item_release(
199 struct xfs_log_item *lip)
200 {
201 struct xfs_bud_log_item *budp = BUD_ITEM(lip);
202
203 xfs_bui_release(budp->bud_buip);
204 kmem_free(budp->bud_item.li_lv_shadow);
205 kmem_cache_free(xfs_bud_cache, budp);
206 }
207
208 static struct xfs_log_item *
xfs_bud_item_intent(struct xfs_log_item * lip)209 xfs_bud_item_intent(
210 struct xfs_log_item *lip)
211 {
212 return &BUD_ITEM(lip)->bud_buip->bui_item;
213 }
214
215 static const struct xfs_item_ops xfs_bud_item_ops = {
216 .flags = XFS_ITEM_RELEASE_WHEN_COMMITTED |
217 XFS_ITEM_INTENT_DONE,
218 .iop_size = xfs_bud_item_size,
219 .iop_format = xfs_bud_item_format,
220 .iop_release = xfs_bud_item_release,
221 .iop_intent = xfs_bud_item_intent,
222 };
223
224 /* Sort bmap intents by inode. */
225 static int
xfs_bmap_update_diff_items(void * priv,const struct list_head * a,const struct list_head * b)226 xfs_bmap_update_diff_items(
227 void *priv,
228 const struct list_head *a,
229 const struct list_head *b)
230 {
231 struct xfs_bmap_intent *ba;
232 struct xfs_bmap_intent *bb;
233
234 ba = container_of(a, struct xfs_bmap_intent, bi_list);
235 bb = container_of(b, struct xfs_bmap_intent, bi_list);
236 return ba->bi_owner->i_ino - bb->bi_owner->i_ino;
237 }
238
239 /* Set the map extent flags for this mapping. */
240 static void
xfs_trans_set_bmap_flags(struct xfs_map_extent * map,enum xfs_bmap_intent_type type,int whichfork,xfs_exntst_t state)241 xfs_trans_set_bmap_flags(
242 struct xfs_map_extent *map,
243 enum xfs_bmap_intent_type type,
244 int whichfork,
245 xfs_exntst_t state)
246 {
247 map->me_flags = 0;
248 switch (type) {
249 case XFS_BMAP_MAP:
250 case XFS_BMAP_UNMAP:
251 map->me_flags = type;
252 break;
253 default:
254 ASSERT(0);
255 }
256 if (state == XFS_EXT_UNWRITTEN)
257 map->me_flags |= XFS_BMAP_EXTENT_UNWRITTEN;
258 if (whichfork == XFS_ATTR_FORK)
259 map->me_flags |= XFS_BMAP_EXTENT_ATTR_FORK;
260 }
261
262 /* Log bmap updates in the intent item. */
263 STATIC void
xfs_bmap_update_log_item(struct xfs_trans * tp,struct xfs_bui_log_item * buip,struct xfs_bmap_intent * bi)264 xfs_bmap_update_log_item(
265 struct xfs_trans *tp,
266 struct xfs_bui_log_item *buip,
267 struct xfs_bmap_intent *bi)
268 {
269 uint next_extent;
270 struct xfs_map_extent *map;
271
272 /*
273 * atomic_inc_return gives us the value after the increment;
274 * we want to use it as an array index so we need to subtract 1 from
275 * it.
276 */
277 next_extent = atomic_inc_return(&buip->bui_next_extent) - 1;
278 ASSERT(next_extent < buip->bui_format.bui_nextents);
279 map = &buip->bui_format.bui_extents[next_extent];
280 map->me_owner = bi->bi_owner->i_ino;
281 map->me_startblock = bi->bi_bmap.br_startblock;
282 map->me_startoff = bi->bi_bmap.br_startoff;
283 map->me_len = bi->bi_bmap.br_blockcount;
284 xfs_trans_set_bmap_flags(map, bi->bi_type, bi->bi_whichfork,
285 bi->bi_bmap.br_state);
286 }
287
288 static struct xfs_log_item *
xfs_bmap_update_create_intent(struct xfs_trans * tp,struct list_head * items,unsigned int count,bool sort)289 xfs_bmap_update_create_intent(
290 struct xfs_trans *tp,
291 struct list_head *items,
292 unsigned int count,
293 bool sort)
294 {
295 struct xfs_mount *mp = tp->t_mountp;
296 struct xfs_bui_log_item *buip = xfs_bui_init(mp);
297 struct xfs_bmap_intent *bi;
298
299 ASSERT(count == XFS_BUI_MAX_FAST_EXTENTS);
300
301 if (sort)
302 list_sort(mp, items, xfs_bmap_update_diff_items);
303 list_for_each_entry(bi, items, bi_list)
304 xfs_bmap_update_log_item(tp, buip, bi);
305 return &buip->bui_item;
306 }
307
308 /* Get an BUD so we can process all the deferred bmap updates. */
309 static struct xfs_log_item *
xfs_bmap_update_create_done(struct xfs_trans * tp,struct xfs_log_item * intent,unsigned int count)310 xfs_bmap_update_create_done(
311 struct xfs_trans *tp,
312 struct xfs_log_item *intent,
313 unsigned int count)
314 {
315 struct xfs_bui_log_item *buip = BUI_ITEM(intent);
316 struct xfs_bud_log_item *budp;
317
318 budp = kmem_cache_zalloc(xfs_bud_cache, GFP_KERNEL | __GFP_NOFAIL);
319 xfs_log_item_init(tp->t_mountp, &budp->bud_item, XFS_LI_BUD,
320 &xfs_bud_item_ops);
321 budp->bud_buip = buip;
322 budp->bud_format.bud_bui_id = buip->bui_format.bui_id;
323
324 return &budp->bud_item;
325 }
326
327 /* Take a passive ref to the AG containing the space we're mapping. */
328 void
xfs_bmap_update_get_group(struct xfs_mount * mp,struct xfs_bmap_intent * bi)329 xfs_bmap_update_get_group(
330 struct xfs_mount *mp,
331 struct xfs_bmap_intent *bi)
332 {
333 xfs_agnumber_t agno;
334
335 agno = XFS_FSB_TO_AGNO(mp, bi->bi_bmap.br_startblock);
336
337 /*
338 * Bump the intent count on behalf of the deferred rmap and refcount
339 * intent items that that we can queue when we finish this bmap work.
340 * This new intent item will bump the intent count before the bmap
341 * intent drops the intent count, ensuring that the intent count
342 * remains nonzero across the transaction roll.
343 */
344 bi->bi_pag = xfs_perag_intent_get(mp, agno);
345 }
346
347 /* Release a passive AG ref after finishing mapping work. */
348 static inline void
xfs_bmap_update_put_group(struct xfs_bmap_intent * bi)349 xfs_bmap_update_put_group(
350 struct xfs_bmap_intent *bi)
351 {
352 xfs_perag_intent_put(bi->bi_pag);
353 }
354
355 /* Process a deferred bmap update. */
356 STATIC int
xfs_bmap_update_finish_item(struct xfs_trans * tp,struct xfs_log_item * done,struct list_head * item,struct xfs_btree_cur ** state)357 xfs_bmap_update_finish_item(
358 struct xfs_trans *tp,
359 struct xfs_log_item *done,
360 struct list_head *item,
361 struct xfs_btree_cur **state)
362 {
363 struct xfs_bmap_intent *bi;
364 int error;
365
366 bi = container_of(item, struct xfs_bmap_intent, bi_list);
367
368 error = xfs_bmap_finish_one(tp, bi);
369 if (!error && bi->bi_bmap.br_blockcount > 0) {
370 ASSERT(bi->bi_type == XFS_BMAP_UNMAP);
371 return -EAGAIN;
372 }
373
374 xfs_bmap_update_put_group(bi);
375 kmem_cache_free(xfs_bmap_intent_cache, bi);
376 return error;
377 }
378
379 /* Abort all pending BUIs. */
380 STATIC void
xfs_bmap_update_abort_intent(struct xfs_log_item * intent)381 xfs_bmap_update_abort_intent(
382 struct xfs_log_item *intent)
383 {
384 xfs_bui_release(BUI_ITEM(intent));
385 }
386
387 /* Cancel a deferred bmap update. */
388 STATIC void
xfs_bmap_update_cancel_item(struct list_head * item)389 xfs_bmap_update_cancel_item(
390 struct list_head *item)
391 {
392 struct xfs_bmap_intent *bi;
393
394 bi = container_of(item, struct xfs_bmap_intent, bi_list);
395
396 xfs_bmap_update_put_group(bi);
397 kmem_cache_free(xfs_bmap_intent_cache, bi);
398 }
399
400 /* Is this recovered BUI ok? */
401 static inline bool
xfs_bui_validate(struct xfs_mount * mp,struct xfs_bui_log_item * buip)402 xfs_bui_validate(
403 struct xfs_mount *mp,
404 struct xfs_bui_log_item *buip)
405 {
406 struct xfs_map_extent *map;
407
408 /* Only one mapping operation per BUI... */
409 if (buip->bui_format.bui_nextents != XFS_BUI_MAX_FAST_EXTENTS)
410 return false;
411
412 map = &buip->bui_format.bui_extents[0];
413
414 if (map->me_flags & ~XFS_BMAP_EXTENT_FLAGS)
415 return false;
416
417 switch (map->me_flags & XFS_BMAP_EXTENT_TYPE_MASK) {
418 case XFS_BMAP_MAP:
419 case XFS_BMAP_UNMAP:
420 break;
421 default:
422 return false;
423 }
424
425 if (!xfs_verify_ino(mp, map->me_owner))
426 return false;
427
428 if (!xfs_verify_fileext(mp, map->me_startoff, map->me_len))
429 return false;
430
431 return xfs_verify_fsbext(mp, map->me_startblock, map->me_len);
432 }
433
434 static inline struct xfs_bmap_intent *
xfs_bui_recover_work(struct xfs_mount * mp,struct xfs_defer_pending * dfp,struct xfs_inode ** ipp,struct xfs_map_extent * map)435 xfs_bui_recover_work(
436 struct xfs_mount *mp,
437 struct xfs_defer_pending *dfp,
438 struct xfs_inode **ipp,
439 struct xfs_map_extent *map)
440 {
441 struct xfs_bmap_intent *bi;
442 int error;
443
444 error = xlog_recover_iget(mp, map->me_owner, ipp);
445 if (error)
446 return ERR_PTR(error);
447
448 bi = kmem_cache_zalloc(xfs_bmap_intent_cache, GFP_NOFS | __GFP_NOFAIL);
449 bi->bi_whichfork = (map->me_flags & XFS_BMAP_EXTENT_ATTR_FORK) ?
450 XFS_ATTR_FORK : XFS_DATA_FORK;
451 bi->bi_type = map->me_flags & XFS_BMAP_EXTENT_TYPE_MASK;
452 bi->bi_bmap.br_startblock = map->me_startblock;
453 bi->bi_bmap.br_startoff = map->me_startoff;
454 bi->bi_bmap.br_blockcount = map->me_len;
455 bi->bi_bmap.br_state = (map->me_flags & XFS_BMAP_EXTENT_UNWRITTEN) ?
456 XFS_EXT_UNWRITTEN : XFS_EXT_NORM;
457 bi->bi_owner = *ipp;
458 xfs_bmap_update_get_group(mp, bi);
459
460 xfs_defer_add_item(dfp, &bi->bi_list);
461 return bi;
462 }
463
464 /*
465 * Process a bmap update intent item that was recovered from the log.
466 * We need to update some inode's bmbt.
467 */
468 STATIC int
xfs_bmap_recover_work(struct xfs_defer_pending * dfp,struct list_head * capture_list)469 xfs_bmap_recover_work(
470 struct xfs_defer_pending *dfp,
471 struct list_head *capture_list)
472 {
473 struct xfs_trans_res resv;
474 struct xfs_log_item *lip = dfp->dfp_intent;
475 struct xfs_bui_log_item *buip = BUI_ITEM(lip);
476 struct xfs_trans *tp;
477 struct xfs_inode *ip = NULL;
478 struct xfs_mount *mp = lip->li_log->l_mp;
479 struct xfs_map_extent *map;
480 struct xfs_bmap_intent *work;
481 int iext_delta;
482 int error = 0;
483
484 if (!xfs_bui_validate(mp, buip)) {
485 XFS_CORRUPTION_ERROR(__func__, XFS_ERRLEVEL_LOW, mp,
486 &buip->bui_format, sizeof(buip->bui_format));
487 return -EFSCORRUPTED;
488 }
489
490 map = &buip->bui_format.bui_extents[0];
491 work = xfs_bui_recover_work(mp, dfp, &ip, map);
492 if (IS_ERR(work))
493 return PTR_ERR(work);
494
495 /* Allocate transaction and do the work. */
496 resv = xlog_recover_resv(&M_RES(mp)->tr_itruncate);
497 error = xfs_trans_alloc(mp, &resv,
498 XFS_EXTENTADD_SPACE_RES(mp, XFS_DATA_FORK), 0, 0, &tp);
499 if (error)
500 goto err_rele;
501
502 xfs_ilock(ip, XFS_ILOCK_EXCL);
503 xfs_trans_ijoin(tp, ip, 0);
504
505 if (work->bi_type == XFS_BMAP_MAP)
506 iext_delta = XFS_IEXT_ADD_NOSPLIT_CNT;
507 else
508 iext_delta = XFS_IEXT_PUNCH_HOLE_CNT;
509
510 error = xfs_iext_count_may_overflow(ip, work->bi_whichfork, iext_delta);
511 if (error == -EFBIG)
512 error = xfs_iext_count_upgrade(tp, ip, iext_delta);
513 if (error)
514 goto err_cancel;
515
516 error = xlog_recover_finish_intent(tp, dfp);
517 if (error == -EFSCORRUPTED)
518 XFS_CORRUPTION_ERROR(__func__, XFS_ERRLEVEL_LOW, mp,
519 &buip->bui_format, sizeof(buip->bui_format));
520 if (error)
521 goto err_cancel;
522
523 /*
524 * Commit transaction, which frees the transaction and saves the inode
525 * for later replay activities.
526 */
527 error = xfs_defer_ops_capture_and_commit(tp, capture_list);
528 if (error)
529 goto err_unlock;
530
531 xfs_iunlock(ip, XFS_ILOCK_EXCL);
532 xfs_irele(ip);
533 return 0;
534
535 err_cancel:
536 xfs_trans_cancel(tp);
537 err_unlock:
538 xfs_iunlock(ip, XFS_ILOCK_EXCL);
539 err_rele:
540 xfs_irele(ip);
541 return error;
542 }
543
544 /* Relog an intent item to push the log tail forward. */
545 static struct xfs_log_item *
xfs_bmap_relog_intent(struct xfs_trans * tp,struct xfs_log_item * intent,struct xfs_log_item * done_item)546 xfs_bmap_relog_intent(
547 struct xfs_trans *tp,
548 struct xfs_log_item *intent,
549 struct xfs_log_item *done_item)
550 {
551 struct xfs_bui_log_item *buip;
552 struct xfs_map_extent *map;
553 unsigned int count;
554
555 count = BUI_ITEM(intent)->bui_format.bui_nextents;
556 map = BUI_ITEM(intent)->bui_format.bui_extents;
557
558 buip = xfs_bui_init(tp->t_mountp);
559 memcpy(buip->bui_format.bui_extents, map, count * sizeof(*map));
560 atomic_set(&buip->bui_next_extent, count);
561
562 return &buip->bui_item;
563 }
564
565 const struct xfs_defer_op_type xfs_bmap_update_defer_type = {
566 .name = "bmap",
567 .max_items = XFS_BUI_MAX_FAST_EXTENTS,
568 .create_intent = xfs_bmap_update_create_intent,
569 .abort_intent = xfs_bmap_update_abort_intent,
570 .create_done = xfs_bmap_update_create_done,
571 .finish_item = xfs_bmap_update_finish_item,
572 .cancel_item = xfs_bmap_update_cancel_item,
573 .recover_work = xfs_bmap_recover_work,
574 .relog_intent = xfs_bmap_relog_intent,
575 };
576
577 STATIC bool
xfs_bui_item_match(struct xfs_log_item * lip,uint64_t intent_id)578 xfs_bui_item_match(
579 struct xfs_log_item *lip,
580 uint64_t intent_id)
581 {
582 return BUI_ITEM(lip)->bui_format.bui_id == intent_id;
583 }
584
585 static const struct xfs_item_ops xfs_bui_item_ops = {
586 .flags = XFS_ITEM_INTENT,
587 .iop_size = xfs_bui_item_size,
588 .iop_format = xfs_bui_item_format,
589 .iop_unpin = xfs_bui_item_unpin,
590 .iop_release = xfs_bui_item_release,
591 .iop_match = xfs_bui_item_match,
592 };
593
594 static inline void
xfs_bui_copy_format(struct xfs_bui_log_format * dst,const struct xfs_bui_log_format * src)595 xfs_bui_copy_format(
596 struct xfs_bui_log_format *dst,
597 const struct xfs_bui_log_format *src)
598 {
599 unsigned int i;
600
601 memcpy(dst, src, offsetof(struct xfs_bui_log_format, bui_extents));
602
603 for (i = 0; i < src->bui_nextents; i++)
604 memcpy(&dst->bui_extents[i], &src->bui_extents[i],
605 sizeof(struct xfs_map_extent));
606 }
607
608 /*
609 * This routine is called to create an in-core extent bmap update
610 * item from the bui format structure which was logged on disk.
611 * It allocates an in-core bui, copies the extents from the format
612 * structure into it, and adds the bui to the AIL with the given
613 * LSN.
614 */
615 STATIC int
xlog_recover_bui_commit_pass2(struct xlog * log,struct list_head * buffer_list,struct xlog_recover_item * item,xfs_lsn_t lsn)616 xlog_recover_bui_commit_pass2(
617 struct xlog *log,
618 struct list_head *buffer_list,
619 struct xlog_recover_item *item,
620 xfs_lsn_t lsn)
621 {
622 struct xfs_mount *mp = log->l_mp;
623 struct xfs_bui_log_item *buip;
624 struct xfs_bui_log_format *bui_formatp;
625 size_t len;
626
627 bui_formatp = item->ri_buf[0].i_addr;
628
629 if (item->ri_buf[0].i_len < xfs_bui_log_format_sizeof(0)) {
630 XFS_CORRUPTION_ERROR(__func__, XFS_ERRLEVEL_LOW, mp,
631 item->ri_buf[0].i_addr, item->ri_buf[0].i_len);
632 return -EFSCORRUPTED;
633 }
634
635 if (bui_formatp->bui_nextents != XFS_BUI_MAX_FAST_EXTENTS) {
636 XFS_CORRUPTION_ERROR(__func__, XFS_ERRLEVEL_LOW, mp,
637 item->ri_buf[0].i_addr, item->ri_buf[0].i_len);
638 return -EFSCORRUPTED;
639 }
640
641 len = xfs_bui_log_format_sizeof(bui_formatp->bui_nextents);
642 if (item->ri_buf[0].i_len != len) {
643 XFS_CORRUPTION_ERROR(__func__, XFS_ERRLEVEL_LOW, mp,
644 item->ri_buf[0].i_addr, item->ri_buf[0].i_len);
645 return -EFSCORRUPTED;
646 }
647
648 buip = xfs_bui_init(mp);
649 xfs_bui_copy_format(&buip->bui_format, bui_formatp);
650 atomic_set(&buip->bui_next_extent, bui_formatp->bui_nextents);
651
652 xlog_recover_intent_item(log, &buip->bui_item, lsn,
653 &xfs_bmap_update_defer_type);
654 return 0;
655 }
656
657 const struct xlog_recover_item_ops xlog_bui_item_ops = {
658 .item_type = XFS_LI_BUI,
659 .commit_pass2 = xlog_recover_bui_commit_pass2,
660 };
661
662 /*
663 * This routine is called when an BUD format structure is found in a committed
664 * transaction in the log. Its purpose is to cancel the corresponding BUI if it
665 * was still in the log. To do this it searches the AIL for the BUI with an id
666 * equal to that in the BUD format structure. If we find it we drop the BUD
667 * reference, which removes the BUI from the AIL and frees it.
668 */
669 STATIC int
xlog_recover_bud_commit_pass2(struct xlog * log,struct list_head * buffer_list,struct xlog_recover_item * item,xfs_lsn_t lsn)670 xlog_recover_bud_commit_pass2(
671 struct xlog *log,
672 struct list_head *buffer_list,
673 struct xlog_recover_item *item,
674 xfs_lsn_t lsn)
675 {
676 struct xfs_bud_log_format *bud_formatp;
677
678 bud_formatp = item->ri_buf[0].i_addr;
679 if (item->ri_buf[0].i_len != sizeof(struct xfs_bud_log_format)) {
680 XFS_CORRUPTION_ERROR(__func__, XFS_ERRLEVEL_LOW, log->l_mp,
681 item->ri_buf[0].i_addr, item->ri_buf[0].i_len);
682 return -EFSCORRUPTED;
683 }
684
685 xlog_recover_release_intent(log, XFS_LI_BUI, bud_formatp->bud_bui_id);
686 return 0;
687 }
688
689 const struct xlog_recover_item_ops xlog_bud_item_ops = {
690 .item_type = XFS_LI_BUD,
691 .commit_pass2 = xlog_recover_bud_commit_pass2,
692 };
693