xfs_refcount_item.c

  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_trans.h"
 16#include "xfs_trans_priv.h"
 17#include "xfs_refcount_item.h"
 18#include "xfs_log.h"
 19#include "xfs_refcount.h"
 20#include "xfs_error.h"
 21#include "xfs_log_priv.h"
 22#include "xfs_log_recover.h"
 23#include "xfs_ag.h"
 24#include "xfs_btree.h"
 25#include "xfs_trace.h"
 26#include "xfs_rtgroup.h"
 27
 28struct kmem_cache	*xfs_cui_cache;
 29struct kmem_cache	*xfs_cud_cache;
 30
 31static const struct xfs_item_ops xfs_cui_item_ops;
 32
 33static inline struct xfs_cui_log_item *CUI_ITEM(struct xfs_log_item *lip)
 34{
 35	return container_of(lip, struct xfs_cui_log_item, cui_item);
 36}
 37
 38STATIC void
 39xfs_cui_item_free(
 40	struct xfs_cui_log_item	*cuip)
 41{
 42	kvfree(cuip->cui_item.li_lv_shadow);
 43	if (cuip->cui_format.cui_nextents > XFS_CUI_MAX_FAST_EXTENTS)
 44		kfree(cuip);
 45	else
 46		kmem_cache_free(xfs_cui_cache, cuip);
 47}
 48
 49/*
 50 * Freeing the CUI requires that we remove it from the AIL if it has already
 51 * been placed there. However, the CUI may not yet have been placed in the AIL
 52 * when called by xfs_cui_release() from CUD processing due to the ordering of
 53 * committed vs unpin operations in bulk insert operations. Hence the reference
 54 * count to ensure only the last caller frees the CUI.
 55 */
 56STATIC void
 57xfs_cui_release(
 58	struct xfs_cui_log_item	*cuip)
 59{
 60	ASSERT(atomic_read(&cuip->cui_refcount) > 0);
 61	if (!atomic_dec_and_test(&cuip->cui_refcount))
 62		return;
 63
 64	xfs_trans_ail_delete(&cuip->cui_item, 0);
 65	xfs_cui_item_free(cuip);
 66}
 67
 68
 69STATIC void
 70xfs_cui_item_size(
 71	struct xfs_log_item	*lip,
 72	int			*nvecs,
 73	int			*nbytes)
 74{
 75	struct xfs_cui_log_item	*cuip = CUI_ITEM(lip);
 76
 77	*nvecs += 1;
 78	*nbytes += xfs_cui_log_format_sizeof(cuip->cui_format.cui_nextents);
 79}
 80
 81unsigned int xfs_cui_log_space(unsigned int nr)
 82{
 83	return xlog_item_space(1, xfs_cui_log_format_sizeof(nr));
 84}
 85
 86/*
 87 * This is called to fill in the vector of log iovecs for the
 88 * given cui log item. We use only 1 iovec, and we point that
 89 * at the cui_log_format structure embedded in the cui item.
 90 * It is at this point that we assert that all of the extent
 91 * slots in the cui item have been filled.
 92 */
 93STATIC void
 94xfs_cui_item_format(
 95	struct xfs_log_item	*lip,
 96	struct xfs_log_vec	*lv)
 97{
 98	struct xfs_cui_log_item	*cuip = CUI_ITEM(lip);
 99	struct xfs_log_iovec	*vecp = NULL;
100
101	ASSERT(atomic_read(&cuip->cui_next_extent) ==
102			cuip->cui_format.cui_nextents);
103	ASSERT(lip->li_type == XFS_LI_CUI || lip->li_type == XFS_LI_CUI_RT);
104
105	cuip->cui_format.cui_type = lip->li_type;
106	cuip->cui_format.cui_size = 1;
107
108	xlog_copy_iovec(lv, &vecp, XLOG_REG_TYPE_CUI_FORMAT, &cuip->cui_format,
109			xfs_cui_log_format_sizeof(cuip->cui_format.cui_nextents));
110}
111
112/*
113 * The unpin operation is the last place an CUI is manipulated in the log. It is
114 * either inserted in the AIL or aborted in the event of a log I/O error. In
115 * either case, the CUI transaction has been successfully committed to make it
116 * this far. Therefore, we expect whoever committed the CUI to either construct
117 * and commit the CUD or drop the CUD's reference in the event of error. Simply
118 * drop the log's CUI reference now that the log is done with it.
119 */
120STATIC void
121xfs_cui_item_unpin(
122	struct xfs_log_item	*lip,
123	int			remove)
124{
125	struct xfs_cui_log_item	*cuip = CUI_ITEM(lip);
126
127	xfs_cui_release(cuip);
128}
129
130/*
131 * The CUI has been either committed or aborted if the transaction has been
132 * cancelled. If the transaction was cancelled, an CUD isn't going to be
133 * constructed and thus we free the CUI here directly.
134 */
135STATIC void
136xfs_cui_item_release(
137	struct xfs_log_item	*lip)
138{
139	xfs_cui_release(CUI_ITEM(lip));
140}
141
142/*
143 * Allocate and initialize an cui item with the given number of extents.
144 */
145STATIC struct xfs_cui_log_item *
146xfs_cui_init(
147	struct xfs_mount		*mp,
148	unsigned short			item_type,
149	uint				nextents)
150{
151	struct xfs_cui_log_item		*cuip;
152
153	ASSERT(nextents > 0);
154	ASSERT(item_type == XFS_LI_CUI || item_type == XFS_LI_CUI_RT);
155
156	if (nextents > XFS_CUI_MAX_FAST_EXTENTS)
157		cuip = kzalloc(xfs_cui_log_item_sizeof(nextents),
158				GFP_KERNEL | __GFP_NOFAIL);
159	else
160		cuip = kmem_cache_zalloc(xfs_cui_cache,
161					 GFP_KERNEL | __GFP_NOFAIL);
162
163	xfs_log_item_init(mp, &cuip->cui_item, item_type, &xfs_cui_item_ops);
164	cuip->cui_format.cui_nextents = nextents;
165	cuip->cui_format.cui_id = (uintptr_t)(void *)cuip;
166	atomic_set(&cuip->cui_next_extent, 0);
167	atomic_set(&cuip->cui_refcount, 2);
168
169	return cuip;
170}
171
172static inline struct xfs_cud_log_item *CUD_ITEM(struct xfs_log_item *lip)
173{
174	return container_of(lip, struct xfs_cud_log_item, cud_item);
175}
176
177STATIC void
178xfs_cud_item_size(
179	struct xfs_log_item	*lip,
180	int			*nvecs,
181	int			*nbytes)
182{
183	*nvecs += 1;
184	*nbytes += sizeof(struct xfs_cud_log_format);
185}
186
187unsigned int xfs_cud_log_space(void)
188{
189	return xlog_item_space(1, sizeof(struct xfs_cud_log_format));
190}
191
192/*
193 * This is called to fill in the vector of log iovecs for the
194 * given cud log item. We use only 1 iovec, and we point that
195 * at the cud_log_format structure embedded in the cud item.
196 * It is at this point that we assert that all of the extent
197 * slots in the cud item have been filled.
198 */
199STATIC void
200xfs_cud_item_format(
201	struct xfs_log_item	*lip,
202	struct xfs_log_vec	*lv)
203{
204	struct xfs_cud_log_item	*cudp = CUD_ITEM(lip);
205	struct xfs_log_iovec	*vecp = NULL;
206
207	ASSERT(lip->li_type == XFS_LI_CUD || lip->li_type == XFS_LI_CUD_RT);
208
209	cudp->cud_format.cud_type = lip->li_type;
210	cudp->cud_format.cud_size = 1;
211
212	xlog_copy_iovec(lv, &vecp, XLOG_REG_TYPE_CUD_FORMAT, &cudp->cud_format,
213			sizeof(struct xfs_cud_log_format));
214}
215
216/*
217 * The CUD is either committed or aborted if the transaction is cancelled. If
218 * the transaction is cancelled, drop our reference to the CUI and free the
219 * CUD.
220 */
221STATIC void
222xfs_cud_item_release(
223	struct xfs_log_item	*lip)
224{
225	struct xfs_cud_log_item	*cudp = CUD_ITEM(lip);
226
227	xfs_cui_release(cudp->cud_cuip);
228	kvfree(cudp->cud_item.li_lv_shadow);
229	kmem_cache_free(xfs_cud_cache, cudp);
230}
231
232static struct xfs_log_item *
233xfs_cud_item_intent(
234	struct xfs_log_item	*lip)
235{
236	return &CUD_ITEM(lip)->cud_cuip->cui_item;
237}
238
239static const struct xfs_item_ops xfs_cud_item_ops = {
240	.flags		= XFS_ITEM_RELEASE_WHEN_COMMITTED |
241			  XFS_ITEM_INTENT_DONE,
242	.iop_size	= xfs_cud_item_size,
243	.iop_format	= xfs_cud_item_format,
244	.iop_release	= xfs_cud_item_release,
245	.iop_intent	= xfs_cud_item_intent,
246};
247
248static inline struct xfs_refcount_intent *ci_entry(const struct list_head *e)
249{
250	return list_entry(e, struct xfs_refcount_intent, ri_list);
251}
252
253static inline bool
254xfs_cui_item_isrt(const struct xfs_log_item *lip)
255{
256	ASSERT(lip->li_type == XFS_LI_CUI || lip->li_type == XFS_LI_CUI_RT);
257
258	return lip->li_type == XFS_LI_CUI_RT;
259}
260
261/* Sort refcount intents by AG. */
262static int
263xfs_refcount_update_diff_items(
264	void				*priv,
265	const struct list_head		*a,
266	const struct list_head		*b)
267{
268	struct xfs_refcount_intent	*ra = ci_entry(a);
269	struct xfs_refcount_intent	*rb = ci_entry(b);
270
271	return ra->ri_group->xg_gno - rb->ri_group->xg_gno;
272}
273
274/* Log refcount updates in the intent item. */
275STATIC void
276xfs_refcount_update_log_item(
277	struct xfs_trans		*tp,
278	struct xfs_cui_log_item		*cuip,
279	struct xfs_refcount_intent	*ri)
280{
281	uint				next_extent;
282	struct xfs_phys_extent		*pmap;
283
284	/*
285	 * atomic_inc_return gives us the value after the increment;
286	 * we want to use it as an array index so we need to subtract 1 from
287	 * it.
288	 */
289	next_extent = atomic_inc_return(&cuip->cui_next_extent) - 1;
290	ASSERT(next_extent < cuip->cui_format.cui_nextents);
291	pmap = &cuip->cui_format.cui_extents[next_extent];
292	pmap->pe_startblock = ri->ri_startblock;
293	pmap->pe_len = ri->ri_blockcount;
294
295	pmap->pe_flags = 0;
296	switch (ri->ri_type) {
297	case XFS_REFCOUNT_INCREASE:
298	case XFS_REFCOUNT_DECREASE:
299	case XFS_REFCOUNT_ALLOC_COW:
300	case XFS_REFCOUNT_FREE_COW:
301		pmap->pe_flags |= ri->ri_type;
302		break;
303	default:
304		ASSERT(0);
305	}
306}
307
308static struct xfs_log_item *
309__xfs_refcount_update_create_intent(
310	struct xfs_trans		*tp,
311	struct list_head		*items,
312	unsigned int			count,
313	bool				sort,
314	unsigned short			item_type)
315{
316	struct xfs_mount		*mp = tp->t_mountp;
317	struct xfs_cui_log_item		*cuip;
318	struct xfs_refcount_intent	*ri;
319
320	ASSERT(count > 0);
321
322	cuip = xfs_cui_init(mp, item_type, count);
323	if (sort)
324		list_sort(mp, items, xfs_refcount_update_diff_items);
325	list_for_each_entry(ri, items, ri_list)
326		xfs_refcount_update_log_item(tp, cuip, ri);
327	return &cuip->cui_item;
328}
329
330static struct xfs_log_item *
331xfs_refcount_update_create_intent(
332	struct xfs_trans		*tp,
333	struct list_head		*items,
334	unsigned int			count,
335	bool				sort)
336{
337	return __xfs_refcount_update_create_intent(tp, items, count, sort,
338			XFS_LI_CUI);
339}
340
341static inline unsigned short
342xfs_cud_type_from_cui(const struct xfs_cui_log_item *cuip)
343{
344	return xfs_cui_item_isrt(&cuip->cui_item) ? XFS_LI_CUD_RT : XFS_LI_CUD;
345}
346
347/* Get an CUD so we can process all the deferred refcount updates. */
348static struct xfs_log_item *
349xfs_refcount_update_create_done(
350	struct xfs_trans		*tp,
351	struct xfs_log_item		*intent,
352	unsigned int			count)
353{
354	struct xfs_cui_log_item		*cuip = CUI_ITEM(intent);
355	struct xfs_cud_log_item		*cudp;
356
357	cudp = kmem_cache_zalloc(xfs_cud_cache, GFP_KERNEL | __GFP_NOFAIL);
358	xfs_log_item_init(tp->t_mountp, &cudp->cud_item,
359			xfs_cud_type_from_cui(cuip), &xfs_cud_item_ops);
360	cudp->cud_cuip = cuip;
361	cudp->cud_format.cud_cui_id = cuip->cui_format.cui_id;
362
363	return &cudp->cud_item;
364}
365
366/* Add this deferred CUI to the transaction. */
367void
368xfs_refcount_defer_add(
369	struct xfs_trans		*tp,
370	struct xfs_refcount_intent	*ri)
371{
372	struct xfs_mount		*mp = tp->t_mountp;
373
374	/*
375	 * Deferred refcount updates for the realtime and data sections must
376	 * use separate transactions to finish deferred work because updates to
377	 * realtime metadata files can lock AGFs to allocate btree blocks and
378	 * we don't want that mixing with the AGF locks taken to finish data
379	 * section updates.
380	 */
381	ri->ri_group = xfs_group_intent_get(mp, ri->ri_startblock,
382			ri->ri_realtime ? XG_TYPE_RTG : XG_TYPE_AG);
383
384	trace_xfs_refcount_defer(mp, ri);
385	xfs_defer_add(tp, &ri->ri_list, ri->ri_realtime ?
386			&xfs_rtrefcount_update_defer_type :
387			&xfs_refcount_update_defer_type);
388}
389
390/* Cancel a deferred refcount update. */
391STATIC void
392xfs_refcount_update_cancel_item(
393	struct list_head		*item)
394{
395	struct xfs_refcount_intent	*ri = ci_entry(item);
396
397	xfs_group_intent_put(ri->ri_group);
398	kmem_cache_free(xfs_refcount_intent_cache, ri);
399}
400
401/* Process a deferred refcount update. */
402STATIC int
403xfs_refcount_update_finish_item(
404	struct xfs_trans		*tp,
405	struct xfs_log_item		*done,
406	struct list_head		*item,
407	struct xfs_btree_cur		**state)
408{
409	struct xfs_refcount_intent	*ri = ci_entry(item);
410	int				error;
411
412	/* Did we run out of reservation?  Requeue what we didn't finish. */
413	error = xfs_refcount_finish_one(tp, ri, state);
414	if (!error && ri->ri_blockcount > 0) {
415		ASSERT(ri->ri_type == XFS_REFCOUNT_INCREASE ||
416		       ri->ri_type == XFS_REFCOUNT_DECREASE);
417		return -EAGAIN;
418	}
419
420	xfs_refcount_update_cancel_item(item);
421	return error;
422}
423
424/* Clean up after calling xfs_refcount_finish_one. */
425STATIC void
426xfs_refcount_finish_one_cleanup(
427	struct xfs_trans	*tp,
428	struct xfs_btree_cur	*rcur,
429	int			error)
430{
431	struct xfs_buf		*agbp;
432
433	if (rcur == NULL)
434		return;
435	agbp = rcur->bc_ag.agbp;
436	xfs_btree_del_cursor(rcur, error);
437	if (error && agbp)
438		xfs_trans_brelse(tp, agbp);
439}
440
441/* Abort all pending CUIs. */
442STATIC void
443xfs_refcount_update_abort_intent(
444	struct xfs_log_item		*intent)
445{
446	xfs_cui_release(CUI_ITEM(intent));
447}
448
449/* Is this recovered CUI ok? */
450static inline bool
451xfs_cui_validate_phys(
452	struct xfs_mount		*mp,
453	bool				isrt,
454	struct xfs_phys_extent		*pmap)
455{
456	if (!xfs_has_reflink(mp))
457		return false;
458
459	if (pmap->pe_flags & ~XFS_REFCOUNT_EXTENT_FLAGS)
460		return false;
461
462	switch (pmap->pe_flags & XFS_REFCOUNT_EXTENT_TYPE_MASK) {
463	case XFS_REFCOUNT_INCREASE:
464	case XFS_REFCOUNT_DECREASE:
465	case XFS_REFCOUNT_ALLOC_COW:
466	case XFS_REFCOUNT_FREE_COW:
467		break;
468	default:
469		return false;
470	}
471
472	if (isrt)
473		return xfs_verify_rtbext(mp, pmap->pe_startblock, pmap->pe_len);
474
475	return xfs_verify_fsbext(mp, pmap->pe_startblock, pmap->pe_len);
476}
477
478static inline void
479xfs_cui_recover_work(
480	struct xfs_mount		*mp,
481	struct xfs_defer_pending	*dfp,
482	bool				isrt,
483	struct xfs_phys_extent		*pmap)
484{
485	struct xfs_refcount_intent	*ri;
486
487	ri = kmem_cache_alloc(xfs_refcount_intent_cache,
488			GFP_KERNEL | __GFP_NOFAIL);
489	ri->ri_type = pmap->pe_flags & XFS_REFCOUNT_EXTENT_TYPE_MASK;
490	ri->ri_startblock = pmap->pe_startblock;
491	ri->ri_blockcount = pmap->pe_len;
492	ri->ri_group = xfs_group_intent_get(mp, pmap->pe_startblock,
493			isrt ? XG_TYPE_RTG : XG_TYPE_AG);
494	ri->ri_realtime = isrt;
495
496	xfs_defer_add_item(dfp, &ri->ri_list);
497}
498
499/*
500 * Process a refcount update intent item that was recovered from the log.
501 * We need to update the refcountbt.
502 */
503STATIC int
504xfs_refcount_recover_work(
505	struct xfs_defer_pending	*dfp,
506	struct list_head		*capture_list)
507{
508	struct xfs_trans_res		resv;
509	struct xfs_log_item		*lip = dfp->dfp_intent;
510	struct xfs_cui_log_item		*cuip = CUI_ITEM(lip);
511	struct xfs_trans		*tp;
512	struct xfs_mount		*mp = lip->li_log->l_mp;
513	bool				isrt = xfs_cui_item_isrt(lip);
514	int				i;
515	int				error = 0;
516
517	/*
518	 * First check the validity of the extents described by the
519	 * CUI.  If any are bad, then assume that all are bad and
520	 * just toss the CUI.
521	 */
522	for (i = 0; i < cuip->cui_format.cui_nextents; i++) {
523		if (!xfs_cui_validate_phys(mp, isrt,
524					&cuip->cui_format.cui_extents[i])) {
525			XFS_CORRUPTION_ERROR(__func__, XFS_ERRLEVEL_LOW, mp,
526					&cuip->cui_format,
527					sizeof(cuip->cui_format));
528			return -EFSCORRUPTED;
529		}
530
531		xfs_cui_recover_work(mp, dfp, isrt,
532				&cuip->cui_format.cui_extents[i]);
533	}
534
535	/*
536	 * Under normal operation, refcount updates are deferred, so we
537	 * wouldn't be adding them directly to a transaction.  All
538	 * refcount updates manage reservation usage internally and
539	 * dynamically by deferring work that won't fit in the
540	 * transaction.  Normally, any work that needs to be deferred
541	 * gets attached to the same defer_ops that scheduled the
542	 * refcount update.  However, we're in log recovery here, so we
543	 * use the passed in defer_ops and to finish up any work that
544	 * doesn't fit.  We need to reserve enough blocks to handle a
545	 * full btree split on either end of the refcount range.
546	 */
547	resv = xlog_recover_resv(&M_RES(mp)->tr_itruncate);
548	error = xfs_trans_alloc(mp, &resv, mp->m_refc_maxlevels * 2, 0,
549			XFS_TRANS_RESERVE, &tp);
550	if (error)
551		return error;
552
553	error = xlog_recover_finish_intent(tp, dfp);
554	if (error == -EFSCORRUPTED)
555		XFS_CORRUPTION_ERROR(__func__, XFS_ERRLEVEL_LOW, mp,
556				&cuip->cui_format,
557				sizeof(cuip->cui_format));
558	if (error)
559		goto abort_error;
560
561	return xfs_defer_ops_capture_and_commit(tp, capture_list);
562
563abort_error:
564	xfs_trans_cancel(tp);
565	return error;
566}
567
568/* Relog an intent item to push the log tail forward. */
569static struct xfs_log_item *
570xfs_refcount_relog_intent(
571	struct xfs_trans		*tp,
572	struct xfs_log_item		*intent,
573	struct xfs_log_item		*done_item)
574{
575	struct xfs_cui_log_item		*cuip;
576	struct xfs_phys_extent		*pmap;
577	unsigned int			count;
578
579	ASSERT(intent->li_type == XFS_LI_CUI ||
580	       intent->li_type == XFS_LI_CUI_RT);
581
582	count = CUI_ITEM(intent)->cui_format.cui_nextents;
583	pmap = CUI_ITEM(intent)->cui_format.cui_extents;
584
585	cuip = xfs_cui_init(tp->t_mountp, intent->li_type, count);
586	memcpy(cuip->cui_format.cui_extents, pmap, count * sizeof(*pmap));
587	atomic_set(&cuip->cui_next_extent, count);
588
589	return &cuip->cui_item;
590}
591
592const struct xfs_defer_op_type xfs_refcount_update_defer_type = {
593	.name		= "refcount",
594	.max_items	= XFS_CUI_MAX_FAST_EXTENTS,
595	.create_intent	= xfs_refcount_update_create_intent,
596	.abort_intent	= xfs_refcount_update_abort_intent,
597	.create_done	= xfs_refcount_update_create_done,
598	.finish_item	= xfs_refcount_update_finish_item,
599	.finish_cleanup = xfs_refcount_finish_one_cleanup,
600	.cancel_item	= xfs_refcount_update_cancel_item,
601	.recover_work	= xfs_refcount_recover_work,
602	.relog_intent	= xfs_refcount_relog_intent,
603};
604
605#ifdef CONFIG_XFS_RT
606static struct xfs_log_item *
607xfs_rtrefcount_update_create_intent(
608	struct xfs_trans		*tp,
609	struct list_head		*items,
610	unsigned int			count,
611	bool				sort)
612{
613	return __xfs_refcount_update_create_intent(tp, items, count, sort,
614			XFS_LI_CUI_RT);
615}
616
617/* Process a deferred realtime refcount update. */
618STATIC int
619xfs_rtrefcount_update_finish_item(
620	struct xfs_trans		*tp,
621	struct xfs_log_item		*done,
622	struct list_head		*item,
623	struct xfs_btree_cur		**state)
624{
625	struct xfs_refcount_intent	*ri = ci_entry(item);
626	int				error;
627
628	error = xfs_rtrefcount_finish_one(tp, ri, state);
629
630	/* Did we run out of reservation?  Requeue what we didn't finish. */
631	if (!error && ri->ri_blockcount > 0) {
632		ASSERT(ri->ri_type == XFS_REFCOUNT_INCREASE ||
633		       ri->ri_type == XFS_REFCOUNT_DECREASE);
634		return -EAGAIN;
635	}
636
637	xfs_refcount_update_cancel_item(item);
638	return error;
639}
640
641/* Clean up after calling xfs_rtrefcount_finish_one. */
642STATIC void
643xfs_rtrefcount_finish_one_cleanup(
644	struct xfs_trans	*tp,
645	struct xfs_btree_cur	*rcur,
646	int			error)
647{
648	if (rcur)
649		xfs_btree_del_cursor(rcur, error);
650}
651
652const struct xfs_defer_op_type xfs_rtrefcount_update_defer_type = {
653	.name		= "rtrefcount",
654	.max_items	= XFS_CUI_MAX_FAST_EXTENTS,
655	.create_intent	= xfs_rtrefcount_update_create_intent,
656	.abort_intent	= xfs_refcount_update_abort_intent,
657	.create_done	= xfs_refcount_update_create_done,
658	.finish_item	= xfs_rtrefcount_update_finish_item,
659	.finish_cleanup = xfs_rtrefcount_finish_one_cleanup,
660	.cancel_item	= xfs_refcount_update_cancel_item,
661	.recover_work	= xfs_refcount_recover_work,
662	.relog_intent	= xfs_refcount_relog_intent,
663};
664#else
665const struct xfs_defer_op_type xfs_rtrefcount_update_defer_type = {
666	.name		= "rtrefcount",
667};
668#endif /* CONFIG_XFS_RT */
669
670STATIC bool
671xfs_cui_item_match(
672	struct xfs_log_item	*lip,
673	uint64_t		intent_id)
674{
675	return CUI_ITEM(lip)->cui_format.cui_id == intent_id;
676}
677
678static const struct xfs_item_ops xfs_cui_item_ops = {
679	.flags		= XFS_ITEM_INTENT,
680	.iop_size	= xfs_cui_item_size,
681	.iop_format	= xfs_cui_item_format,
682	.iop_unpin	= xfs_cui_item_unpin,
683	.iop_release	= xfs_cui_item_release,
684	.iop_match	= xfs_cui_item_match,
685};
686
687static inline void
688xfs_cui_copy_format(
689	struct xfs_cui_log_format	*dst,
690	const struct xfs_cui_log_format	*src)
691{
692	unsigned int			i;
693
694	memcpy(dst, src, offsetof(struct xfs_cui_log_format, cui_extents));
695
696	for (i = 0; i < src->cui_nextents; i++)
697		memcpy(&dst->cui_extents[i], &src->cui_extents[i],
698				sizeof(struct xfs_phys_extent));
699}
700
701/*
702 * This routine is called to create an in-core extent refcount update
703 * item from the cui format structure which was logged on disk.
704 * It allocates an in-core cui, copies the extents from the format
705 * structure into it, and adds the cui to the AIL with the given
706 * LSN.
707 */
708STATIC int
709xlog_recover_cui_commit_pass2(
710	struct xlog			*log,
711	struct list_head		*buffer_list,
712	struct xlog_recover_item	*item,
713	xfs_lsn_t			lsn)
714{
715	struct xfs_mount		*mp = log->l_mp;
716	struct xfs_cui_log_item		*cuip;
717	struct xfs_cui_log_format	*cui_formatp;
718	size_t				len;
719
720	cui_formatp = item->ri_buf[0].iov_base;
721
722	if (item->ri_buf[0].iov_len < xfs_cui_log_format_sizeof(0)) {
723		XFS_CORRUPTION_ERROR(__func__, XFS_ERRLEVEL_LOW, mp,
724				item->ri_buf[0].iov_base, item->ri_buf[0].iov_len);
725		return -EFSCORRUPTED;
726	}
727
728	len = xfs_cui_log_format_sizeof(cui_formatp->cui_nextents);
729	if (item->ri_buf[0].iov_len != len) {
730		XFS_CORRUPTION_ERROR(__func__, XFS_ERRLEVEL_LOW, mp,
731				item->ri_buf[0].iov_base, item->ri_buf[0].iov_len);
732		return -EFSCORRUPTED;
733	}
734
735	cuip = xfs_cui_init(mp, ITEM_TYPE(item), cui_formatp->cui_nextents);
736	xfs_cui_copy_format(&cuip->cui_format, cui_formatp);
737	atomic_set(&cuip->cui_next_extent, cui_formatp->cui_nextents);
738
739	xlog_recover_intent_item(log, &cuip->cui_item, lsn,
740			&xfs_refcount_update_defer_type);
741	return 0;
742}
743
744const struct xlog_recover_item_ops xlog_cui_item_ops = {
745	.item_type		= XFS_LI_CUI,
746	.commit_pass2		= xlog_recover_cui_commit_pass2,
747};
748
749#ifdef CONFIG_XFS_RT
750STATIC int
751xlog_recover_rtcui_commit_pass2(
752	struct xlog			*log,
753	struct list_head		*buffer_list,
754	struct xlog_recover_item	*item,
755	xfs_lsn_t			lsn)
756{
757	struct xfs_mount		*mp = log->l_mp;
758	struct xfs_cui_log_item		*cuip;
759	struct xfs_cui_log_format	*cui_formatp;
760	size_t				len;
761
762	cui_formatp = item->ri_buf[0].iov_base;
763
764	if (item->ri_buf[0].iov_len < xfs_cui_log_format_sizeof(0)) {
765		XFS_CORRUPTION_ERROR(__func__, XFS_ERRLEVEL_LOW, mp,
766				item->ri_buf[0].iov_base, item->ri_buf[0].iov_len);
767		return -EFSCORRUPTED;
768	}
769
770	len = xfs_cui_log_format_sizeof(cui_formatp->cui_nextents);
771	if (item->ri_buf[0].iov_len != len) {
772		XFS_CORRUPTION_ERROR(__func__, XFS_ERRLEVEL_LOW, mp,
773				item->ri_buf[0].iov_base, item->ri_buf[0].iov_len);
774		return -EFSCORRUPTED;
775	}
776
777	cuip = xfs_cui_init(mp, ITEM_TYPE(item), cui_formatp->cui_nextents);
778	xfs_cui_copy_format(&cuip->cui_format, cui_formatp);
779	atomic_set(&cuip->cui_next_extent, cui_formatp->cui_nextents);
780
781	xlog_recover_intent_item(log, &cuip->cui_item, lsn,
782			&xfs_rtrefcount_update_defer_type);
783	return 0;
784}
785#else
786STATIC int
787xlog_recover_rtcui_commit_pass2(
788	struct xlog			*log,
789	struct list_head		*buffer_list,
790	struct xlog_recover_item	*item,
791	xfs_lsn_t			lsn)
792{
793	XFS_CORRUPTION_ERROR(__func__, XFS_ERRLEVEL_LOW, log->l_mp,
794			item->ri_buf[0].iov_base, item->ri_buf[0].iov_len);
795	return -EFSCORRUPTED;
796}
797#endif
798
799const struct xlog_recover_item_ops xlog_rtcui_item_ops = {
800	.item_type		= XFS_LI_CUI_RT,
801	.commit_pass2		= xlog_recover_rtcui_commit_pass2,
802};
803
804/*
805 * This routine is called when an CUD format structure is found in a committed
806 * transaction in the log. Its purpose is to cancel the corresponding CUI if it
807 * was still in the log. To do this it searches the AIL for the CUI with an id
808 * equal to that in the CUD format structure. If we find it we drop the CUD
809 * reference, which removes the CUI from the AIL and frees it.
810 */
811STATIC int
812xlog_recover_cud_commit_pass2(
813	struct xlog			*log,
814	struct list_head		*buffer_list,
815	struct xlog_recover_item	*item,
816	xfs_lsn_t			lsn)
817{
818	struct xfs_cud_log_format	*cud_formatp;
819
820	cud_formatp = item->ri_buf[0].iov_base;
821	if (item->ri_buf[0].iov_len != sizeof(struct xfs_cud_log_format)) {
822		XFS_CORRUPTION_ERROR(__func__, XFS_ERRLEVEL_LOW, log->l_mp,
823				item->ri_buf[0].iov_base, item->ri_buf[0].iov_len);
824		return -EFSCORRUPTED;
825	}
826
827	xlog_recover_release_intent(log, XFS_LI_CUI, cud_formatp->cud_cui_id);
828	return 0;
829}
830
831const struct xlog_recover_item_ops xlog_cud_item_ops = {
832	.item_type		= XFS_LI_CUD,
833	.commit_pass2		= xlog_recover_cud_commit_pass2,
834};
835
836#ifdef CONFIG_XFS_RT
837STATIC int
838xlog_recover_rtcud_commit_pass2(
839	struct xlog			*log,
840	struct list_head		*buffer_list,
841	struct xlog_recover_item	*item,
842	xfs_lsn_t			lsn)
843{
844	struct xfs_cud_log_format	*cud_formatp;
845
846	cud_formatp = item->ri_buf[0].iov_base;
847	if (item->ri_buf[0].iov_len != sizeof(struct xfs_cud_log_format)) {
848		XFS_CORRUPTION_ERROR(__func__, XFS_ERRLEVEL_LOW, log->l_mp,
849				item->ri_buf[0].iov_base, item->ri_buf[0].iov_len);
850		return -EFSCORRUPTED;
851	}
852
853	xlog_recover_release_intent(log, XFS_LI_CUI_RT,
854			cud_formatp->cud_cui_id);
855	return 0;
856}
857#else
858# define xlog_recover_rtcud_commit_pass2	xlog_recover_rtcui_commit_pass2
859#endif
860
861const struct xlog_recover_item_ops xlog_rtcud_item_ops = {
862	.item_type		= XFS_LI_CUD_RT,
863	.commit_pass2		= xlog_recover_rtcud_commit_pass2,
864};