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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
28struct kmem_cache *xfs_bui_cache;
29struct kmem_cache *xfs_bud_cache;
30
31static const struct xfs_item_ops xfs_bui_item_ops;
32
33static inline struct xfs_bui_log_item *BUI_ITEM(struct xfs_log_item *lip)
34{
35 return container_of(lip, struct xfs_bui_log_item, bui_item);
36}
37
38STATIC void
39xfs_bui_item_free(
40 struct xfs_bui_log_item *buip)
41{
42 kmem_free(buip->bui_item.li_lv_shadow);
43 kmem_cache_free(xfs_bui_cache, buip);
44}
45
46/*
47 * Freeing the BUI requires that we remove it from the AIL if it has already
48 * been placed there. However, the BUI may not yet have been placed in the AIL
49 * when called by xfs_bui_release() from BUD processing due to the ordering of
50 * committed vs unpin operations in bulk insert operations. Hence the reference
51 * count to ensure only the last caller frees the BUI.
52 */
53STATIC void
54xfs_bui_release(
55 struct xfs_bui_log_item *buip)
56{
57 ASSERT(atomic_read(&buip->bui_refcount) > 0);
58 if (!atomic_dec_and_test(&buip->bui_refcount))
59 return;
60
61 xfs_trans_ail_delete(&buip->bui_item, 0);
62 xfs_bui_item_free(buip);
63}
64
65
66STATIC void
67xfs_bui_item_size(
68 struct xfs_log_item *lip,
69 int *nvecs,
70 int *nbytes)
71{
72 struct xfs_bui_log_item *buip = BUI_ITEM(lip);
73
74 *nvecs += 1;
75 *nbytes += xfs_bui_log_format_sizeof(buip->bui_format.bui_nextents);
76}
77
78/*
79 * This is called to fill in the vector of log iovecs for the
80 * given bui log item. We use only 1 iovec, and we point that
81 * at the bui_log_format structure embedded in the bui item.
82 * It is at this point that we assert that all of the extent
83 * slots in the bui item have been filled.
84 */
85STATIC void
86xfs_bui_item_format(
87 struct xfs_log_item *lip,
88 struct xfs_log_vec *lv)
89{
90 struct xfs_bui_log_item *buip = BUI_ITEM(lip);
91 struct xfs_log_iovec *vecp = NULL;
92
93 ASSERT(atomic_read(&buip->bui_next_extent) ==
94 buip->bui_format.bui_nextents);
95
96 buip->bui_format.bui_type = XFS_LI_BUI;
97 buip->bui_format.bui_size = 1;
98
99 xlog_copy_iovec(lv, &vecp, XLOG_REG_TYPE_BUI_FORMAT, &buip->bui_format,
100 xfs_bui_log_format_sizeof(buip->bui_format.bui_nextents));
101}
102
103/*
104 * The unpin operation is the last place an BUI is manipulated in the log. It is
105 * either inserted in the AIL or aborted in the event of a log I/O error. In
106 * either case, the BUI transaction has been successfully committed to make it
107 * this far. Therefore, we expect whoever committed the BUI to either construct
108 * and commit the BUD or drop the BUD's reference in the event of error. Simply
109 * drop the log's BUI reference now that the log is done with it.
110 */
111STATIC void
112xfs_bui_item_unpin(
113 struct xfs_log_item *lip,
114 int remove)
115{
116 struct xfs_bui_log_item *buip = BUI_ITEM(lip);
117
118 xfs_bui_release(buip);
119}
120
121/*
122 * The BUI has been either committed or aborted if the transaction has been
123 * cancelled. If the transaction was cancelled, an BUD isn't going to be
124 * constructed and thus we free the BUI here directly.
125 */
126STATIC void
127xfs_bui_item_release(
128 struct xfs_log_item *lip)
129{
130 xfs_bui_release(BUI_ITEM(lip));
131}
132
133/*
134 * Allocate and initialize an bui item with the given number of extents.
135 */
136STATIC struct xfs_bui_log_item *
137xfs_bui_init(
138 struct xfs_mount *mp)
139
140{
141 struct xfs_bui_log_item *buip;
142
143 buip = kmem_cache_zalloc(xfs_bui_cache, GFP_KERNEL | __GFP_NOFAIL);
144
145 xfs_log_item_init(mp, &buip->bui_item, XFS_LI_BUI, &xfs_bui_item_ops);
146 buip->bui_format.bui_nextents = XFS_BUI_MAX_FAST_EXTENTS;
147 buip->bui_format.bui_id = (uintptr_t)(void *)buip;
148 atomic_set(&buip->bui_next_extent, 0);
149 atomic_set(&buip->bui_refcount, 2);
150
151 return buip;
152}
153
154static inline struct xfs_bud_log_item *BUD_ITEM(struct xfs_log_item *lip)
155{
156 return container_of(lip, struct xfs_bud_log_item, bud_item);
157}
158
159STATIC void
160xfs_bud_item_size(
161 struct xfs_log_item *lip,
162 int *nvecs,
163 int *nbytes)
164{
165 *nvecs += 1;
166 *nbytes += sizeof(struct xfs_bud_log_format);
167}
168
169/*
170 * This is called to fill in the vector of log iovecs for the
171 * given bud log item. We use only 1 iovec, and we point that
172 * at the bud_log_format structure embedded in the bud item.
173 * It is at this point that we assert that all of the extent
174 * slots in the bud item have been filled.
175 */
176STATIC void
177xfs_bud_item_format(
178 struct xfs_log_item *lip,
179 struct xfs_log_vec *lv)
180{
181 struct xfs_bud_log_item *budp = BUD_ITEM(lip);
182 struct xfs_log_iovec *vecp = NULL;
183
184 budp->bud_format.bud_type = XFS_LI_BUD;
185 budp->bud_format.bud_size = 1;
186
187 xlog_copy_iovec(lv, &vecp, XLOG_REG_TYPE_BUD_FORMAT, &budp->bud_format,
188 sizeof(struct xfs_bud_log_format));
189}
190
191/*
192 * The BUD is either committed or aborted if the transaction is cancelled. If
193 * the transaction is cancelled, drop our reference to the BUI and free the
194 * BUD.
195 */
196STATIC void
197xfs_bud_item_release(
198 struct xfs_log_item *lip)
199{
200 struct xfs_bud_log_item *budp = BUD_ITEM(lip);
201
202 xfs_bui_release(budp->bud_buip);
203 kmem_free(budp->bud_item.li_lv_shadow);
204 kmem_cache_free(xfs_bud_cache, budp);
205}
206
207static struct xfs_log_item *
208xfs_bud_item_intent(
209 struct xfs_log_item *lip)
210{
211 return &BUD_ITEM(lip)->bud_buip->bui_item;
212}
213
214static const struct xfs_item_ops xfs_bud_item_ops = {
215 .flags = XFS_ITEM_RELEASE_WHEN_COMMITTED |
216 XFS_ITEM_INTENT_DONE,
217 .iop_size = xfs_bud_item_size,
218 .iop_format = xfs_bud_item_format,
219 .iop_release = xfs_bud_item_release,
220 .iop_intent = xfs_bud_item_intent,
221};
222
223static struct xfs_bud_log_item *
224xfs_trans_get_bud(
225 struct xfs_trans *tp,
226 struct xfs_bui_log_item *buip)
227{
228 struct xfs_bud_log_item *budp;
229
230 budp = kmem_cache_zalloc(xfs_bud_cache, GFP_KERNEL | __GFP_NOFAIL);
231 xfs_log_item_init(tp->t_mountp, &budp->bud_item, XFS_LI_BUD,
232 &xfs_bud_item_ops);
233 budp->bud_buip = buip;
234 budp->bud_format.bud_bui_id = buip->bui_format.bui_id;
235
236 xfs_trans_add_item(tp, &budp->bud_item);
237 return budp;
238}
239
240/*
241 * Finish an bmap update and log it to the BUD. Note that the
242 * transaction is marked dirty regardless of whether the bmap update
243 * succeeds or fails to support the BUI/BUD lifecycle rules.
244 */
245static int
246xfs_trans_log_finish_bmap_update(
247 struct xfs_trans *tp,
248 struct xfs_bud_log_item *budp,
249 enum xfs_bmap_intent_type type,
250 struct xfs_inode *ip,
251 int whichfork,
252 xfs_fileoff_t startoff,
253 xfs_fsblock_t startblock,
254 xfs_filblks_t *blockcount,
255 xfs_exntst_t state)
256{
257 int error;
258
259 error = xfs_bmap_finish_one(tp, ip, type, whichfork, startoff,
260 startblock, blockcount, state);
261
262 /*
263 * Mark the transaction dirty, even on error. This ensures the
264 * transaction is aborted, which:
265 *
266 * 1.) releases the BUI and frees the BUD
267 * 2.) shuts down the filesystem
268 */
269 tp->t_flags |= XFS_TRANS_DIRTY | XFS_TRANS_HAS_INTENT_DONE;
270 set_bit(XFS_LI_DIRTY, &budp->bud_item.li_flags);
271
272 return error;
273}
274
275/* Sort bmap intents by inode. */
276static int
277xfs_bmap_update_diff_items(
278 void *priv,
279 const struct list_head *a,
280 const struct list_head *b)
281{
282 struct xfs_bmap_intent *ba;
283 struct xfs_bmap_intent *bb;
284
285 ba = container_of(a, struct xfs_bmap_intent, bi_list);
286 bb = container_of(b, struct xfs_bmap_intent, bi_list);
287 return ba->bi_owner->i_ino - bb->bi_owner->i_ino;
288}
289
290/* Set the map extent flags for this mapping. */
291static void
292xfs_trans_set_bmap_flags(
293 struct xfs_map_extent *bmap,
294 enum xfs_bmap_intent_type type,
295 int whichfork,
296 xfs_exntst_t state)
297{
298 bmap->me_flags = 0;
299 switch (type) {
300 case XFS_BMAP_MAP:
301 case XFS_BMAP_UNMAP:
302 bmap->me_flags = type;
303 break;
304 default:
305 ASSERT(0);
306 }
307 if (state == XFS_EXT_UNWRITTEN)
308 bmap->me_flags |= XFS_BMAP_EXTENT_UNWRITTEN;
309 if (whichfork == XFS_ATTR_FORK)
310 bmap->me_flags |= XFS_BMAP_EXTENT_ATTR_FORK;
311}
312
313/* Log bmap updates in the intent item. */
314STATIC void
315xfs_bmap_update_log_item(
316 struct xfs_trans *tp,
317 struct xfs_bui_log_item *buip,
318 struct xfs_bmap_intent *bmap)
319{
320 uint next_extent;
321 struct xfs_map_extent *map;
322
323 tp->t_flags |= XFS_TRANS_DIRTY;
324 set_bit(XFS_LI_DIRTY, &buip->bui_item.li_flags);
325
326 /*
327 * atomic_inc_return gives us the value after the increment;
328 * we want to use it as an array index so we need to subtract 1 from
329 * it.
330 */
331 next_extent = atomic_inc_return(&buip->bui_next_extent) - 1;
332 ASSERT(next_extent < buip->bui_format.bui_nextents);
333 map = &buip->bui_format.bui_extents[next_extent];
334 map->me_owner = bmap->bi_owner->i_ino;
335 map->me_startblock = bmap->bi_bmap.br_startblock;
336 map->me_startoff = bmap->bi_bmap.br_startoff;
337 map->me_len = bmap->bi_bmap.br_blockcount;
338 xfs_trans_set_bmap_flags(map, bmap->bi_type, bmap->bi_whichfork,
339 bmap->bi_bmap.br_state);
340}
341
342static struct xfs_log_item *
343xfs_bmap_update_create_intent(
344 struct xfs_trans *tp,
345 struct list_head *items,
346 unsigned int count,
347 bool sort)
348{
349 struct xfs_mount *mp = tp->t_mountp;
350 struct xfs_bui_log_item *buip = xfs_bui_init(mp);
351 struct xfs_bmap_intent *bmap;
352
353 ASSERT(count == XFS_BUI_MAX_FAST_EXTENTS);
354
355 xfs_trans_add_item(tp, &buip->bui_item);
356 if (sort)
357 list_sort(mp, items, xfs_bmap_update_diff_items);
358 list_for_each_entry(bmap, items, bi_list)
359 xfs_bmap_update_log_item(tp, buip, bmap);
360 return &buip->bui_item;
361}
362
363/* Get an BUD so we can process all the deferred rmap updates. */
364static struct xfs_log_item *
365xfs_bmap_update_create_done(
366 struct xfs_trans *tp,
367 struct xfs_log_item *intent,
368 unsigned int count)
369{
370 return &xfs_trans_get_bud(tp, BUI_ITEM(intent))->bud_item;
371}
372
373/* Process a deferred rmap update. */
374STATIC int
375xfs_bmap_update_finish_item(
376 struct xfs_trans *tp,
377 struct xfs_log_item *done,
378 struct list_head *item,
379 struct xfs_btree_cur **state)
380{
381 struct xfs_bmap_intent *bmap;
382 xfs_filblks_t count;
383 int error;
384
385 bmap = container_of(item, struct xfs_bmap_intent, bi_list);
386 count = bmap->bi_bmap.br_blockcount;
387 error = xfs_trans_log_finish_bmap_update(tp, BUD_ITEM(done),
388 bmap->bi_type,
389 bmap->bi_owner, bmap->bi_whichfork,
390 bmap->bi_bmap.br_startoff,
391 bmap->bi_bmap.br_startblock,
392 &count,
393 bmap->bi_bmap.br_state);
394 if (!error && count > 0) {
395 ASSERT(bmap->bi_type == XFS_BMAP_UNMAP);
396 bmap->bi_bmap.br_blockcount = count;
397 return -EAGAIN;
398 }
399 kmem_cache_free(xfs_bmap_intent_cache, bmap);
400 return error;
401}
402
403/* Abort all pending BUIs. */
404STATIC void
405xfs_bmap_update_abort_intent(
406 struct xfs_log_item *intent)
407{
408 xfs_bui_release(BUI_ITEM(intent));
409}
410
411/* Cancel a deferred rmap update. */
412STATIC void
413xfs_bmap_update_cancel_item(
414 struct list_head *item)
415{
416 struct xfs_bmap_intent *bmap;
417
418 bmap = container_of(item, struct xfs_bmap_intent, bi_list);
419 kmem_cache_free(xfs_bmap_intent_cache, bmap);
420}
421
422const struct xfs_defer_op_type xfs_bmap_update_defer_type = {
423 .max_items = XFS_BUI_MAX_FAST_EXTENTS,
424 .create_intent = xfs_bmap_update_create_intent,
425 .abort_intent = xfs_bmap_update_abort_intent,
426 .create_done = xfs_bmap_update_create_done,
427 .finish_item = xfs_bmap_update_finish_item,
428 .cancel_item = xfs_bmap_update_cancel_item,
429};
430
431/* Is this recovered BUI ok? */
432static inline bool
433xfs_bui_validate(
434 struct xfs_mount *mp,
435 struct xfs_bui_log_item *buip)
436{
437 struct xfs_map_extent *bmap;
438
439 /* Only one mapping operation per BUI... */
440 if (buip->bui_format.bui_nextents != XFS_BUI_MAX_FAST_EXTENTS)
441 return false;
442
443 bmap = &buip->bui_format.bui_extents[0];
444
445 if (bmap->me_flags & ~XFS_BMAP_EXTENT_FLAGS)
446 return false;
447
448 switch (bmap->me_flags & XFS_BMAP_EXTENT_TYPE_MASK) {
449 case XFS_BMAP_MAP:
450 case XFS_BMAP_UNMAP:
451 break;
452 default:
453 return false;
454 }
455
456 if (!xfs_verify_ino(mp, bmap->me_owner))
457 return false;
458
459 if (!xfs_verify_fileext(mp, bmap->me_startoff, bmap->me_len))
460 return false;
461
462 return xfs_verify_fsbext(mp, bmap->me_startblock, bmap->me_len);
463}
464
465/*
466 * Process a bmap update intent item that was recovered from the log.
467 * We need to update some inode's bmbt.
468 */
469STATIC int
470xfs_bui_item_recover(
471 struct xfs_log_item *lip,
472 struct list_head *capture_list)
473{
474 struct xfs_bmbt_irec irec;
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 *bmap;
480 struct xfs_bud_log_item *budp;
481 xfs_filblks_t count;
482 xfs_exntst_t state;
483 unsigned int bui_type;
484 int whichfork;
485 int iext_delta;
486 int error = 0;
487
488 if (!xfs_bui_validate(mp, buip)) {
489 XFS_CORRUPTION_ERROR(__func__, XFS_ERRLEVEL_LOW, mp,
490 &buip->bui_format, sizeof(buip->bui_format));
491 return -EFSCORRUPTED;
492 }
493
494 bmap = &buip->bui_format.bui_extents[0];
495 state = (bmap->me_flags & XFS_BMAP_EXTENT_UNWRITTEN) ?
496 XFS_EXT_UNWRITTEN : XFS_EXT_NORM;
497 whichfork = (bmap->me_flags & XFS_BMAP_EXTENT_ATTR_FORK) ?
498 XFS_ATTR_FORK : XFS_DATA_FORK;
499 bui_type = bmap->me_flags & XFS_BMAP_EXTENT_TYPE_MASK;
500
501 error = xlog_recover_iget(mp, bmap->me_owner, &ip);
502 if (error)
503 return error;
504
505 /* Allocate transaction and do the work. */
506 error = xfs_trans_alloc(mp, &M_RES(mp)->tr_itruncate,
507 XFS_EXTENTADD_SPACE_RES(mp, XFS_DATA_FORK), 0, 0, &tp);
508 if (error)
509 goto err_rele;
510
511 budp = xfs_trans_get_bud(tp, buip);
512 xfs_ilock(ip, XFS_ILOCK_EXCL);
513 xfs_trans_ijoin(tp, ip, 0);
514
515 if (bui_type == XFS_BMAP_MAP)
516 iext_delta = XFS_IEXT_ADD_NOSPLIT_CNT;
517 else
518 iext_delta = XFS_IEXT_PUNCH_HOLE_CNT;
519
520 error = xfs_iext_count_may_overflow(ip, whichfork, iext_delta);
521 if (error == -EFBIG)
522 error = xfs_iext_count_upgrade(tp, ip, iext_delta);
523 if (error)
524 goto err_cancel;
525
526 count = bmap->me_len;
527 error = xfs_trans_log_finish_bmap_update(tp, budp, bui_type, ip,
528 whichfork, bmap->me_startoff, bmap->me_startblock,
529 &count, state);
530 if (error == -EFSCORRUPTED)
531 XFS_CORRUPTION_ERROR(__func__, XFS_ERRLEVEL_LOW, mp, bmap,
532 sizeof(*bmap));
533 if (error)
534 goto err_cancel;
535
536 if (count > 0) {
537 ASSERT(bui_type == XFS_BMAP_UNMAP);
538 irec.br_startblock = bmap->me_startblock;
539 irec.br_blockcount = count;
540 irec.br_startoff = bmap->me_startoff;
541 irec.br_state = state;
542 xfs_bmap_unmap_extent(tp, ip, &irec);
543 }
544
545 /*
546 * Commit transaction, which frees the transaction and saves the inode
547 * for later replay activities.
548 */
549 error = xfs_defer_ops_capture_and_commit(tp, capture_list);
550 if (error)
551 goto err_unlock;
552
553 xfs_iunlock(ip, XFS_ILOCK_EXCL);
554 xfs_irele(ip);
555 return 0;
556
557err_cancel:
558 xfs_trans_cancel(tp);
559err_unlock:
560 xfs_iunlock(ip, XFS_ILOCK_EXCL);
561err_rele:
562 xfs_irele(ip);
563 return error;
564}
565
566STATIC bool
567xfs_bui_item_match(
568 struct xfs_log_item *lip,
569 uint64_t intent_id)
570{
571 return BUI_ITEM(lip)->bui_format.bui_id == intent_id;
572}
573
574/* Relog an intent item to push the log tail forward. */
575static struct xfs_log_item *
576xfs_bui_item_relog(
577 struct xfs_log_item *intent,
578 struct xfs_trans *tp)
579{
580 struct xfs_bud_log_item *budp;
581 struct xfs_bui_log_item *buip;
582 struct xfs_map_extent *extp;
583 unsigned int count;
584
585 count = BUI_ITEM(intent)->bui_format.bui_nextents;
586 extp = BUI_ITEM(intent)->bui_format.bui_extents;
587
588 tp->t_flags |= XFS_TRANS_DIRTY;
589 budp = xfs_trans_get_bud(tp, BUI_ITEM(intent));
590 set_bit(XFS_LI_DIRTY, &budp->bud_item.li_flags);
591
592 buip = xfs_bui_init(tp->t_mountp);
593 memcpy(buip->bui_format.bui_extents, extp, count * sizeof(*extp));
594 atomic_set(&buip->bui_next_extent, count);
595 xfs_trans_add_item(tp, &buip->bui_item);
596 set_bit(XFS_LI_DIRTY, &buip->bui_item.li_flags);
597 return &buip->bui_item;
598}
599
600static const struct xfs_item_ops xfs_bui_item_ops = {
601 .flags = XFS_ITEM_INTENT,
602 .iop_size = xfs_bui_item_size,
603 .iop_format = xfs_bui_item_format,
604 .iop_unpin = xfs_bui_item_unpin,
605 .iop_release = xfs_bui_item_release,
606 .iop_recover = xfs_bui_item_recover,
607 .iop_match = xfs_bui_item_match,
608 .iop_relog = xfs_bui_item_relog,
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(&buip->bui_format, bui_formatp);
667 atomic_set(&buip->bui_next_extent, bui_formatp->bui_nextents);
668 /*
669 * Insert the intent into the AIL directly and drop one reference so
670 * that finishing or canceling the work will drop the other.
671 */
672 xfs_trans_ail_insert(log->l_ailp, &buip->bui_item, lsn);
673 xfs_bui_release(buip);
674 return 0;
675}
676
677const struct xlog_recover_item_ops xlog_bui_item_ops = {
678 .item_type = XFS_LI_BUI,
679 .commit_pass2 = xlog_recover_bui_commit_pass2,
680};
681
682/*
683 * This routine is called when an BUD format structure is found in a committed
684 * transaction in the log. Its purpose is to cancel the corresponding BUI if it
685 * was still in the log. To do this it searches the AIL for the BUI with an id
686 * equal to that in the BUD format structure. If we find it we drop the BUD
687 * reference, which removes the BUI from the AIL and frees it.
688 */
689STATIC int
690xlog_recover_bud_commit_pass2(
691 struct xlog *log,
692 struct list_head *buffer_list,
693 struct xlog_recover_item *item,
694 xfs_lsn_t lsn)
695{
696 struct xfs_bud_log_format *bud_formatp;
697
698 bud_formatp = item->ri_buf[0].i_addr;
699 if (item->ri_buf[0].i_len != sizeof(struct xfs_bud_log_format)) {
700 XFS_CORRUPTION_ERROR(__func__, XFS_ERRLEVEL_LOW, log->l_mp,
701 item->ri_buf[0].i_addr, item->ri_buf[0].i_len);
702 return -EFSCORRUPTED;
703 }
704
705 xlog_recover_release_intent(log, XFS_LI_BUI, bud_formatp->bud_bui_id);
706 return 0;
707}
708
709const struct xlog_recover_item_ops xlog_bud_item_ops = {
710 .item_type = XFS_LI_BUD,
711 .commit_pass2 = xlog_recover_bud_commit_pass2,
712};