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#include "xfs_trace.h"
29
30struct kmem_cache *xfs_bui_cache;
31struct kmem_cache *xfs_bud_cache;
32
33static const struct xfs_item_ops xfs_bui_item_ops;
34
35static inline struct xfs_bui_log_item *BUI_ITEM(struct xfs_log_item *lip)
36{
37 return container_of(lip, struct xfs_bui_log_item, bui_item);
38}
39
40STATIC void
41xfs_bui_item_free(
42 struct xfs_bui_log_item *buip)
43{
44 kvfree(addr: buip->bui_item.li_lv_shadow);
45 kmem_cache_free(s: xfs_bui_cache, objp: buip);
46}
47
48/*
49 * Freeing the BUI requires that we remove it from the AIL if it has already
50 * been placed there. However, the BUI may not yet have been placed in the AIL
51 * when called by xfs_bui_release() from BUD processing due to the ordering of
52 * committed vs unpin operations in bulk insert operations. Hence the reference
53 * count to ensure only the last caller frees the BUI.
54 */
55STATIC void
56xfs_bui_release(
57 struct xfs_bui_log_item *buip)
58{
59 ASSERT(atomic_read(&buip->bui_refcount) > 0);
60 if (!atomic_dec_and_test(v: &buip->bui_refcount))
61 return;
62
63 xfs_trans_ail_delete(lip: &buip->bui_item, shutdown_type: 0);
64 xfs_bui_item_free(buip);
65}
66
67
68STATIC void
69xfs_bui_item_size(
70 struct xfs_log_item *lip,
71 int *nvecs,
72 int *nbytes)
73{
74 struct xfs_bui_log_item *buip = BUI_ITEM(lip);
75
76 *nvecs += 1;
77 *nbytes += xfs_bui_log_format_sizeof(buip->bui_format.bui_nextents);
78}
79
80/*
81 * This is called to fill in the vector of log iovecs for the
82 * given bui log item. We use only 1 iovec, and we point that
83 * at the bui_log_format structure embedded in the bui item.
84 * It is at this point that we assert that all of the extent
85 * slots in the bui item have been filled.
86 */
87STATIC void
88xfs_bui_item_format(
89 struct xfs_log_item *lip,
90 struct xfs_log_vec *lv)
91{
92 struct xfs_bui_log_item *buip = BUI_ITEM(lip);
93 struct xfs_log_iovec *vecp = NULL;
94
95 ASSERT(atomic_read(&buip->bui_next_extent) ==
96 buip->bui_format.bui_nextents);
97
98 buip->bui_format.bui_type = XFS_LI_BUI;
99 buip->bui_format.bui_size = 1;
100
101 xlog_copy_iovec(lv, &vecp, XLOG_REG_TYPE_BUI_FORMAT, &buip->bui_format,
102 xfs_bui_log_format_sizeof(buip->bui_format.bui_nextents));
103}
104
105/*
106 * The unpin operation is the last place an BUI is manipulated in the log. It is
107 * either inserted in the AIL or aborted in the event of a log I/O error. In
108 * either case, the BUI transaction has been successfully committed to make it
109 * this far. Therefore, we expect whoever committed the BUI to either construct
110 * and commit the BUD or drop the BUD's reference in the event of error. Simply
111 * drop the log's BUI reference now that the log is done with it.
112 */
113STATIC void
114xfs_bui_item_unpin(
115 struct xfs_log_item *lip,
116 int remove)
117{
118 struct xfs_bui_log_item *buip = BUI_ITEM(lip);
119
120 xfs_bui_release(buip);
121}
122
123/*
124 * The BUI has been either committed or aborted if the transaction has been
125 * cancelled. If the transaction was cancelled, an BUD isn't going to be
126 * constructed and thus we free the BUI here directly.
127 */
128STATIC void
129xfs_bui_item_release(
130 struct xfs_log_item *lip)
131{
132 xfs_bui_release(buip: BUI_ITEM(lip));
133}
134
135/*
136 * Allocate and initialize an bui item with the given number of extents.
137 */
138STATIC struct xfs_bui_log_item *
139xfs_bui_init(
140 struct xfs_mount *mp)
141
142{
143 struct xfs_bui_log_item *buip;
144
145 buip = kmem_cache_zalloc(k: xfs_bui_cache, GFP_KERNEL | __GFP_NOFAIL);
146
147 xfs_log_item_init(mp, &buip->bui_item, XFS_LI_BUI, &xfs_bui_item_ops);
148 buip->bui_format.bui_nextents = XFS_BUI_MAX_FAST_EXTENTS;
149 buip->bui_format.bui_id = (uintptr_t)(void *)buip;
150 atomic_set(v: &buip->bui_next_extent, i: 0);
151 atomic_set(v: &buip->bui_refcount, i: 2);
152
153 return buip;
154}
155
156static inline struct xfs_bud_log_item *BUD_ITEM(struct xfs_log_item *lip)
157{
158 return container_of(lip, struct xfs_bud_log_item, bud_item);
159}
160
161STATIC void
162xfs_bud_item_size(
163 struct xfs_log_item *lip,
164 int *nvecs,
165 int *nbytes)
166{
167 *nvecs += 1;
168 *nbytes += sizeof(struct xfs_bud_log_format);
169}
170
171/*
172 * This is called to fill in the vector of log iovecs for the
173 * given bud log item. We use only 1 iovec, and we point that
174 * at the bud_log_format structure embedded in the bud item.
175 * It is at this point that we assert that all of the extent
176 * slots in the bud item have been filled.
177 */
178STATIC void
179xfs_bud_item_format(
180 struct xfs_log_item *lip,
181 struct xfs_log_vec *lv)
182{
183 struct xfs_bud_log_item *budp = BUD_ITEM(lip);
184 struct xfs_log_iovec *vecp = NULL;
185
186 budp->bud_format.bud_type = XFS_LI_BUD;
187 budp->bud_format.bud_size = 1;
188
189 xlog_copy_iovec(lv, &vecp, XLOG_REG_TYPE_BUD_FORMAT, &budp->bud_format,
190 sizeof(struct xfs_bud_log_format));
191}
192
193/*
194 * The BUD is either committed or aborted if the transaction is cancelled. If
195 * the transaction is cancelled, drop our reference to the BUI and free the
196 * BUD.
197 */
198STATIC void
199xfs_bud_item_release(
200 struct xfs_log_item *lip)
201{
202 struct xfs_bud_log_item *budp = BUD_ITEM(lip);
203
204 xfs_bui_release(buip: budp->bud_buip);
205 kvfree(addr: budp->bud_item.li_lv_shadow);
206 kmem_cache_free(s: xfs_bud_cache, objp: budp);
207}
208
209static struct xfs_log_item *
210xfs_bud_item_intent(
211 struct xfs_log_item *lip)
212{
213 return &BUD_ITEM(lip)->bud_buip->bui_item;
214}
215
216static const struct xfs_item_ops xfs_bud_item_ops = {
217 .flags = XFS_ITEM_RELEASE_WHEN_COMMITTED |
218 XFS_ITEM_INTENT_DONE,
219 .iop_size = xfs_bud_item_size,
220 .iop_format = xfs_bud_item_format,
221 .iop_release = xfs_bud_item_release,
222 .iop_intent = xfs_bud_item_intent,
223};
224
225static inline struct xfs_bmap_intent *bi_entry(const struct list_head *e)
226{
227 return list_entry(e, struct xfs_bmap_intent, bi_list);
228}
229
230/* Sort bmap intents by inode. */
231static int
232xfs_bmap_update_diff_items(
233 void *priv,
234 const struct list_head *a,
235 const struct list_head *b)
236{
237 struct xfs_bmap_intent *ba = bi_entry(e: a);
238 struct xfs_bmap_intent *bb = bi_entry(e: b);
239
240 return ba->bi_owner->i_ino - bb->bi_owner->i_ino;
241}
242
243/* Log bmap updates in the intent item. */
244STATIC void
245xfs_bmap_update_log_item(
246 struct xfs_trans *tp,
247 struct xfs_bui_log_item *buip,
248 struct xfs_bmap_intent *bi)
249{
250 uint next_extent;
251 struct xfs_map_extent *map;
252
253 /*
254 * atomic_inc_return gives us the value after the increment;
255 * we want to use it as an array index so we need to subtract 1 from
256 * it.
257 */
258 next_extent = atomic_inc_return(v: &buip->bui_next_extent) - 1;
259 ASSERT(next_extent < buip->bui_format.bui_nextents);
260 map = &buip->bui_format.bui_extents[next_extent];
261 map->me_owner = bi->bi_owner->i_ino;
262 map->me_startblock = bi->bi_bmap.br_startblock;
263 map->me_startoff = bi->bi_bmap.br_startoff;
264 map->me_len = bi->bi_bmap.br_blockcount;
265
266 switch (bi->bi_type) {
267 case XFS_BMAP_MAP:
268 case XFS_BMAP_UNMAP:
269 map->me_flags = bi->bi_type;
270 break;
271 default:
272 ASSERT(0);
273 }
274 if (bi->bi_bmap.br_state == XFS_EXT_UNWRITTEN)
275 map->me_flags |= XFS_BMAP_EXTENT_UNWRITTEN;
276 if (bi->bi_whichfork == XFS_ATTR_FORK)
277 map->me_flags |= XFS_BMAP_EXTENT_ATTR_FORK;
278 if (xfs_ifork_is_realtime(bi->bi_owner, bi->bi_whichfork))
279 map->me_flags |= XFS_BMAP_EXTENT_REALTIME;
280}
281
282static struct xfs_log_item *
283xfs_bmap_update_create_intent(
284 struct xfs_trans *tp,
285 struct list_head *items,
286 unsigned int count,
287 bool sort)
288{
289 struct xfs_mount *mp = tp->t_mountp;
290 struct xfs_bui_log_item *buip = xfs_bui_init(mp);
291 struct xfs_bmap_intent *bi;
292
293 ASSERT(count == XFS_BUI_MAX_FAST_EXTENTS);
294
295 if (sort)
296 list_sort(priv: mp, head: items, cmp: xfs_bmap_update_diff_items);
297 list_for_each_entry(bi, items, bi_list)
298 xfs_bmap_update_log_item(tp, buip, bi);
299 return &buip->bui_item;
300}
301
302/* Get an BUD so we can process all the deferred bmap updates. */
303static struct xfs_log_item *
304xfs_bmap_update_create_done(
305 struct xfs_trans *tp,
306 struct xfs_log_item *intent,
307 unsigned int count)
308{
309 struct xfs_bui_log_item *buip = BUI_ITEM(lip: intent);
310 struct xfs_bud_log_item *budp;
311
312 budp = kmem_cache_zalloc(k: xfs_bud_cache, GFP_KERNEL | __GFP_NOFAIL);
313 xfs_log_item_init(tp->t_mountp, &budp->bud_item, XFS_LI_BUD,
314 &xfs_bud_item_ops);
315 budp->bud_buip = buip;
316 budp->bud_format.bud_bui_id = buip->bui_format.bui_id;
317
318 return &budp->bud_item;
319}
320
321/* Take a passive ref to the AG containing the space we're mapping. */
322static inline void
323xfs_bmap_update_get_group(
324 struct xfs_mount *mp,
325 struct xfs_bmap_intent *bi)
326{
327 xfs_agnumber_t agno;
328
329 if (xfs_ifork_is_realtime(bi->bi_owner, bi->bi_whichfork))
330 return;
331
332 agno = XFS_FSB_TO_AGNO(mp, bi->bi_bmap.br_startblock);
333
334 /*
335 * Bump the intent count on behalf of the deferred rmap and refcount
336 * intent items that that we can queue when we finish this bmap work.
337 * This new intent item will bump the intent count before the bmap
338 * intent drops the intent count, ensuring that the intent count
339 * remains nonzero across the transaction roll.
340 */
341 bi->bi_pag = xfs_perag_intent_get(mp, agno);
342}
343
344/* Add this deferred BUI to the transaction. */
345void
346xfs_bmap_defer_add(
347 struct xfs_trans *tp,
348 struct xfs_bmap_intent *bi)
349{
350 trace_xfs_bmap_defer(bi);
351
352 xfs_bmap_update_get_group(mp: tp->t_mountp, bi);
353 xfs_defer_add(tp, &bi->bi_list, &xfs_bmap_update_defer_type);
354}
355
356/* Release a passive AG ref after finishing mapping work. */
357static inline void
358xfs_bmap_update_put_group(
359 struct xfs_bmap_intent *bi)
360{
361 if (xfs_ifork_is_realtime(bi->bi_owner, bi->bi_whichfork))
362 return;
363
364 xfs_perag_intent_put(pag: bi->bi_pag);
365}
366
367/* Cancel a deferred bmap update. */
368STATIC void
369xfs_bmap_update_cancel_item(
370 struct list_head *item)
371{
372 struct xfs_bmap_intent *bi = bi_entry(e: item);
373
374 xfs_bmap_update_put_group(bi);
375 kmem_cache_free(xfs_bmap_intent_cache, bi);
376}
377
378/* Process a deferred bmap update. */
379STATIC int
380xfs_bmap_update_finish_item(
381 struct xfs_trans *tp,
382 struct xfs_log_item *done,
383 struct list_head *item,
384 struct xfs_btree_cur **state)
385{
386 struct xfs_bmap_intent *bi = bi_entry(e: item);
387 int error;
388
389 error = xfs_bmap_finish_one(tp, bi);
390 if (!error && bi->bi_bmap.br_blockcount > 0) {
391 ASSERT(bi->bi_type == XFS_BMAP_UNMAP);
392 return -EAGAIN;
393 }
394
395 xfs_bmap_update_cancel_item(item);
396 return error;
397}
398
399/* Abort all pending BUIs. */
400STATIC void
401xfs_bmap_update_abort_intent(
402 struct xfs_log_item *intent)
403{
404 xfs_bui_release(buip: BUI_ITEM(lip: intent));
405}
406
407/* Is this recovered BUI ok? */
408static inline bool
409xfs_bui_validate(
410 struct xfs_mount *mp,
411 struct xfs_bui_log_item *buip)
412{
413 struct xfs_map_extent *map;
414
415 /* Only one mapping operation per BUI... */
416 if (buip->bui_format.bui_nextents != XFS_BUI_MAX_FAST_EXTENTS)
417 return false;
418
419 map = &buip->bui_format.bui_extents[0];
420
421 if (map->me_flags & ~XFS_BMAP_EXTENT_FLAGS)
422 return false;
423
424 switch (map->me_flags & XFS_BMAP_EXTENT_TYPE_MASK) {
425 case XFS_BMAP_MAP:
426 case XFS_BMAP_UNMAP:
427 break;
428 default:
429 return false;
430 }
431
432 if (!xfs_verify_ino(mp, map->me_owner))
433 return false;
434
435 if (!xfs_verify_fileext(mp, map->me_startoff, map->me_len))
436 return false;
437
438 if (map->me_flags & XFS_BMAP_EXTENT_REALTIME)
439 return xfs_verify_rtbext(mp, map->me_startblock, map->me_len);
440
441 return xfs_verify_fsbext(mp, map->me_startblock, map->me_len);
442}
443
444static inline struct xfs_bmap_intent *
445xfs_bui_recover_work(
446 struct xfs_mount *mp,
447 struct xfs_defer_pending *dfp,
448 struct xfs_inode **ipp,
449 struct xfs_map_extent *map)
450{
451 struct xfs_bmap_intent *bi;
452 int error;
453
454 error = xlog_recover_iget(mp, map->me_owner, ipp);
455 if (error)
456 return ERR_PTR(error);
457
458 bi = kmem_cache_zalloc(xfs_bmap_intent_cache,
459 GFP_KERNEL | __GFP_NOFAIL);
460 bi->bi_whichfork = (map->me_flags & XFS_BMAP_EXTENT_ATTR_FORK) ?
461 XFS_ATTR_FORK : XFS_DATA_FORK;
462 bi->bi_type = map->me_flags & XFS_BMAP_EXTENT_TYPE_MASK;
463 bi->bi_bmap.br_startblock = map->me_startblock;
464 bi->bi_bmap.br_startoff = map->me_startoff;
465 bi->bi_bmap.br_blockcount = map->me_len;
466 bi->bi_bmap.br_state = (map->me_flags & XFS_BMAP_EXTENT_UNWRITTEN) ?
467 XFS_EXT_UNWRITTEN : XFS_EXT_NORM;
468 bi->bi_owner = *ipp;
469 xfs_bmap_update_get_group(mp, bi);
470
471 xfs_defer_add_item(dfp, &bi->bi_list);
472 return bi;
473}
474
475/*
476 * Process a bmap update intent item that was recovered from the log.
477 * We need to update some inode's bmbt.
478 */
479STATIC int
480xfs_bmap_recover_work(
481 struct xfs_defer_pending *dfp,
482 struct list_head *capture_list)
483{
484 struct xfs_trans_res resv;
485 struct xfs_log_item *lip = dfp->dfp_intent;
486 struct xfs_bui_log_item *buip = BUI_ITEM(lip);
487 struct xfs_trans *tp;
488 struct xfs_inode *ip = NULL;
489 struct xfs_mount *mp = lip->li_log->l_mp;
490 struct xfs_map_extent *map;
491 struct xfs_bmap_intent *work;
492 int iext_delta;
493 int error = 0;
494
495 if (!xfs_bui_validate(mp, buip)) {
496 XFS_CORRUPTION_ERROR(__func__, XFS_ERRLEVEL_LOW, mp,
497 &buip->bui_format, sizeof(buip->bui_format));
498 return -EFSCORRUPTED;
499 }
500
501 map = &buip->bui_format.bui_extents[0];
502 work = xfs_bui_recover_work(mp, dfp, ipp: &ip, map);
503 if (IS_ERR(ptr: work))
504 return PTR_ERR(ptr: work);
505
506 /* Allocate transaction and do the work. */
507 resv = xlog_recover_resv(&M_RES(mp)->tr_itruncate);
508 error = xfs_trans_alloc(mp, &resv,
509 XFS_EXTENTADD_SPACE_RES(mp, XFS_DATA_FORK), 0, 0, &tp);
510 if (error)
511 goto err_rele;
512
513 xfs_ilock(ip, XFS_ILOCK_EXCL);
514 xfs_trans_ijoin(tp, ip, 0);
515
516 if (!!(map->me_flags & XFS_BMAP_EXTENT_REALTIME) !=
517 xfs_ifork_is_realtime(ip, work->bi_whichfork)) {
518 error = -EFSCORRUPTED;
519 goto err_cancel;
520 }
521
522 if (work->bi_type == XFS_BMAP_MAP)
523 iext_delta = XFS_IEXT_ADD_NOSPLIT_CNT;
524 else
525 iext_delta = XFS_IEXT_PUNCH_HOLE_CNT;
526
527 error = xfs_iext_count_may_overflow(ip, work->bi_whichfork, iext_delta);
528 if (error == -EFBIG)
529 error = xfs_iext_count_upgrade(tp, ip, iext_delta);
530 if (error)
531 goto err_cancel;
532
533 error = xlog_recover_finish_intent(tp, dfp);
534 if (error == -EFSCORRUPTED)
535 XFS_CORRUPTION_ERROR(__func__, XFS_ERRLEVEL_LOW, mp,
536 &buip->bui_format, sizeof(buip->bui_format));
537 if (error)
538 goto err_cancel;
539
540 /*
541 * Commit transaction, which frees the transaction and saves the inode
542 * for later replay activities.
543 */
544 error = xfs_defer_ops_capture_and_commit(tp, capture_list);
545 if (error)
546 goto err_unlock;
547
548 xfs_iunlock(ip, XFS_ILOCK_EXCL);
549 xfs_irele(ip);
550 return 0;
551
552err_cancel:
553 xfs_trans_cancel(tp);
554err_unlock:
555 xfs_iunlock(ip, XFS_ILOCK_EXCL);
556err_rele:
557 xfs_irele(ip);
558 return error;
559}
560
561/* Relog an intent item to push the log tail forward. */
562static struct xfs_log_item *
563xfs_bmap_relog_intent(
564 struct xfs_trans *tp,
565 struct xfs_log_item *intent,
566 struct xfs_log_item *done_item)
567{
568 struct xfs_bui_log_item *buip;
569 struct xfs_map_extent *map;
570 unsigned int count;
571
572 count = BUI_ITEM(lip: intent)->bui_format.bui_nextents;
573 map = BUI_ITEM(lip: intent)->bui_format.bui_extents;
574
575 buip = xfs_bui_init(mp: tp->t_mountp);
576 memcpy(buip->bui_format.bui_extents, map, count * sizeof(*map));
577 atomic_set(v: &buip->bui_next_extent, i: count);
578
579 return &buip->bui_item;
580}
581
582const struct xfs_defer_op_type xfs_bmap_update_defer_type = {
583 .name = "bmap",
584 .max_items = XFS_BUI_MAX_FAST_EXTENTS,
585 .create_intent = xfs_bmap_update_create_intent,
586 .abort_intent = xfs_bmap_update_abort_intent,
587 .create_done = xfs_bmap_update_create_done,
588 .finish_item = xfs_bmap_update_finish_item,
589 .cancel_item = xfs_bmap_update_cancel_item,
590 .recover_work = xfs_bmap_recover_work,
591 .relog_intent = xfs_bmap_relog_intent,
592};
593
594STATIC bool
595xfs_bui_item_match(
596 struct xfs_log_item *lip,
597 uint64_t intent_id)
598{
599 return BUI_ITEM(lip)->bui_format.bui_id == intent_id;
600}
601
602static const struct xfs_item_ops xfs_bui_item_ops = {
603 .flags = XFS_ITEM_INTENT,
604 .iop_size = xfs_bui_item_size,
605 .iop_format = xfs_bui_item_format,
606 .iop_unpin = xfs_bui_item_unpin,
607 .iop_release = xfs_bui_item_release,
608 .iop_match = xfs_bui_item_match,
609};
610
611static inline void
612xfs_bui_copy_format(
613 struct xfs_bui_log_format *dst,
614 const struct xfs_bui_log_format *src)
615{
616 unsigned int i;
617
618 memcpy(dst, src, offsetof(struct xfs_bui_log_format, bui_extents));
619
620 for (i = 0; i < src->bui_nextents; i++)
621 memcpy(&dst->bui_extents[i], &src->bui_extents[i],
622 sizeof(struct xfs_map_extent));
623}
624
625/*
626 * This routine is called to create an in-core extent bmap update
627 * item from the bui format structure which was logged on disk.
628 * It allocates an in-core bui, copies the extents from the format
629 * structure into it, and adds the bui to the AIL with the given
630 * LSN.
631 */
632STATIC int
633xlog_recover_bui_commit_pass2(
634 struct xlog *log,
635 struct list_head *buffer_list,
636 struct xlog_recover_item *item,
637 xfs_lsn_t lsn)
638{
639 struct xfs_mount *mp = log->l_mp;
640 struct xfs_bui_log_item *buip;
641 struct xfs_bui_log_format *bui_formatp;
642 size_t len;
643
644 bui_formatp = item->ri_buf[0].i_addr;
645
646 if (item->ri_buf[0].i_len < xfs_bui_log_format_sizeof(0)) {
647 XFS_CORRUPTION_ERROR(__func__, XFS_ERRLEVEL_LOW, mp,
648 item->ri_buf[0].i_addr, item->ri_buf[0].i_len);
649 return -EFSCORRUPTED;
650 }
651
652 if (bui_formatp->bui_nextents != XFS_BUI_MAX_FAST_EXTENTS) {
653 XFS_CORRUPTION_ERROR(__func__, XFS_ERRLEVEL_LOW, mp,
654 item->ri_buf[0].i_addr, item->ri_buf[0].i_len);
655 return -EFSCORRUPTED;
656 }
657
658 len = xfs_bui_log_format_sizeof(bui_formatp->bui_nextents);
659 if (item->ri_buf[0].i_len != len) {
660 XFS_CORRUPTION_ERROR(__func__, XFS_ERRLEVEL_LOW, mp,
661 item->ri_buf[0].i_addr, item->ri_buf[0].i_len);
662 return -EFSCORRUPTED;
663 }
664
665 buip = xfs_bui_init(mp);
666 xfs_bui_copy_format(dst: &buip->bui_format, src: bui_formatp);
667 atomic_set(v: &buip->bui_next_extent, i: bui_formatp->bui_nextents);
668
669 xlog_recover_intent_item(log, &buip->bui_item, lsn,
670 &xfs_bmap_update_defer_type);
671 return 0;
672}
673
674const struct xlog_recover_item_ops xlog_bui_item_ops = {
675 .item_type = XFS_LI_BUI,
676 .commit_pass2 = xlog_recover_bui_commit_pass2,
677};
678
679/*
680 * This routine is called when an BUD format structure is found in a committed
681 * transaction in the log. Its purpose is to cancel the corresponding BUI if it
682 * was still in the log. To do this it searches the AIL for the BUI with an id
683 * equal to that in the BUD format structure. If we find it we drop the BUD
684 * reference, which removes the BUI from the AIL and frees it.
685 */
686STATIC int
687xlog_recover_bud_commit_pass2(
688 struct xlog *log,
689 struct list_head *buffer_list,
690 struct xlog_recover_item *item,
691 xfs_lsn_t lsn)
692{
693 struct xfs_bud_log_format *bud_formatp;
694
695 bud_formatp = item->ri_buf[0].i_addr;
696 if (item->ri_buf[0].i_len != sizeof(struct xfs_bud_log_format)) {
697 XFS_CORRUPTION_ERROR(__func__, XFS_ERRLEVEL_LOW, log->l_mp,
698 item->ri_buf[0].i_addr, item->ri_buf[0].i_len);
699 return -EFSCORRUPTED;
700 }
701
702 xlog_recover_release_intent(log, XFS_LI_BUI, bud_formatp->bud_bui_id);
703 return 0;
704}
705
706const struct xlog_recover_item_ops xlog_bud_item_ops = {
707 .item_type = XFS_LI_BUD,
708 .commit_pass2 = xlog_recover_bud_commit_pass2,
709};
710

source code of linux/fs/xfs/xfs_bmap_item.c