1 // SPDX-License-Identifier: GPL-2.0
3 * Copyright (c) 2000-2001,2005 Silicon Graphics, Inc.
8 #include "xfs_format.h"
9 #include "xfs_log_format.h"
10 #include "xfs_trans_resv.h"
12 #include "xfs_shared.h"
13 #include "xfs_mount.h"
15 #include "xfs_defer.h"
16 #include "xfs_trans.h"
17 #include "xfs_trans_priv.h"
18 #include "xfs_extfree_item.h"
20 #include "xfs_btree.h"
22 #include "xfs_alloc.h"
24 #include "xfs_trace.h"
25 #include "xfs_error.h"
26 #include "xfs_log_priv.h"
27 #include "xfs_log_recover.h"
29 struct kmem_cache *xfs_efi_cache;
30 struct kmem_cache *xfs_efd_cache;
32 static const struct xfs_item_ops xfs_efi_item_ops;
34 static inline struct xfs_efi_log_item *EFI_ITEM(struct xfs_log_item *lip)
36 return container_of(lip, struct xfs_efi_log_item, efi_item);
41 struct xfs_efi_log_item *efip)
43 kmem_free(efip->efi_item.li_lv_shadow);
44 if (efip->efi_format.efi_nextents > XFS_EFI_MAX_FAST_EXTENTS)
47 kmem_cache_free(xfs_efi_cache, efip);
51 * Freeing the efi requires that we remove it from the AIL if it has already
52 * been placed there. However, the EFI may not yet have been placed in the AIL
53 * when called by xfs_efi_release() from EFD processing due to the ordering of
54 * committed vs unpin operations in bulk insert operations. Hence the reference
55 * count to ensure only the last caller frees the EFI.
59 struct xfs_efi_log_item *efip)
61 ASSERT(atomic_read(&efip->efi_refcount) > 0);
62 if (!atomic_dec_and_test(&efip->efi_refcount))
65 xfs_trans_ail_delete(&efip->efi_item, 0);
66 xfs_efi_item_free(efip);
70 * This returns the number of iovecs needed to log the given efi item.
71 * We only need 1 iovec for an efi item. It just logs the efi_log_format
76 struct xfs_efi_log_item *efip)
78 return sizeof(struct xfs_efi_log_format) +
79 (efip->efi_format.efi_nextents - 1) * sizeof(xfs_extent_t);
84 struct xfs_log_item *lip,
89 *nbytes += xfs_efi_item_sizeof(EFI_ITEM(lip));
93 * This is called to fill in the vector of log iovecs for the
94 * given efi log item. We use only 1 iovec, and we point that
95 * at the efi_log_format structure embedded in the efi item.
96 * It is at this point that we assert that all of the extent
97 * slots in the efi item have been filled.
101 struct xfs_log_item *lip,
102 struct xfs_log_vec *lv)
104 struct xfs_efi_log_item *efip = EFI_ITEM(lip);
105 struct xfs_log_iovec *vecp = NULL;
107 ASSERT(atomic_read(&efip->efi_next_extent) ==
108 efip->efi_format.efi_nextents);
110 efip->efi_format.efi_type = XFS_LI_EFI;
111 efip->efi_format.efi_size = 1;
113 xlog_copy_iovec(lv, &vecp, XLOG_REG_TYPE_EFI_FORMAT,
115 xfs_efi_item_sizeof(efip));
120 * The unpin operation is the last place an EFI is manipulated in the log. It is
121 * either inserted in the AIL or aborted in the event of a log I/O error. In
122 * either case, the EFI transaction has been successfully committed to make it
123 * this far. Therefore, we expect whoever committed the EFI to either construct
124 * and commit the EFD or drop the EFD's reference in the event of error. Simply
125 * drop the log's EFI reference now that the log is done with it.
129 struct xfs_log_item *lip,
132 struct xfs_efi_log_item *efip = EFI_ITEM(lip);
133 xfs_efi_release(efip);
137 * The EFI has been either committed or aborted if the transaction has been
138 * cancelled. If the transaction was cancelled, an EFD isn't going to be
139 * constructed and thus we free the EFI here directly.
142 xfs_efi_item_release(
143 struct xfs_log_item *lip)
145 xfs_efi_release(EFI_ITEM(lip));
149 * Allocate and initialize an efi item with the given number of extents.
151 STATIC struct xfs_efi_log_item *
153 struct xfs_mount *mp,
157 struct xfs_efi_log_item *efip;
160 ASSERT(nextents > 0);
161 if (nextents > XFS_EFI_MAX_FAST_EXTENTS) {
162 size = (uint)(sizeof(struct xfs_efi_log_item) +
163 ((nextents - 1) * sizeof(xfs_extent_t)));
164 efip = kmem_zalloc(size, 0);
166 efip = kmem_cache_zalloc(xfs_efi_cache,
167 GFP_KERNEL | __GFP_NOFAIL);
170 xfs_log_item_init(mp, &efip->efi_item, XFS_LI_EFI, &xfs_efi_item_ops);
171 efip->efi_format.efi_nextents = nextents;
172 efip->efi_format.efi_id = (uintptr_t)(void *)efip;
173 atomic_set(&efip->efi_next_extent, 0);
174 atomic_set(&efip->efi_refcount, 2);
180 * Copy an EFI format buffer from the given buf, and into the destination
181 * EFI format structure.
182 * The given buffer can be in 32 bit or 64 bit form (which has different padding),
183 * one of which will be the native format for this kernel.
184 * It will handle the conversion of formats if necessary.
187 xfs_efi_copy_format(xfs_log_iovec_t *buf, xfs_efi_log_format_t *dst_efi_fmt)
189 xfs_efi_log_format_t *src_efi_fmt = buf->i_addr;
191 uint len = sizeof(xfs_efi_log_format_t) +
192 (src_efi_fmt->efi_nextents - 1) * sizeof(xfs_extent_t);
193 uint len32 = sizeof(xfs_efi_log_format_32_t) +
194 (src_efi_fmt->efi_nextents - 1) * sizeof(xfs_extent_32_t);
195 uint len64 = sizeof(xfs_efi_log_format_64_t) +
196 (src_efi_fmt->efi_nextents - 1) * sizeof(xfs_extent_64_t);
198 if (buf->i_len == len) {
199 memcpy((char *)dst_efi_fmt, (char*)src_efi_fmt, len);
201 } else if (buf->i_len == len32) {
202 xfs_efi_log_format_32_t *src_efi_fmt_32 = buf->i_addr;
204 dst_efi_fmt->efi_type = src_efi_fmt_32->efi_type;
205 dst_efi_fmt->efi_size = src_efi_fmt_32->efi_size;
206 dst_efi_fmt->efi_nextents = src_efi_fmt_32->efi_nextents;
207 dst_efi_fmt->efi_id = src_efi_fmt_32->efi_id;
208 for (i = 0; i < dst_efi_fmt->efi_nextents; i++) {
209 dst_efi_fmt->efi_extents[i].ext_start =
210 src_efi_fmt_32->efi_extents[i].ext_start;
211 dst_efi_fmt->efi_extents[i].ext_len =
212 src_efi_fmt_32->efi_extents[i].ext_len;
215 } else if (buf->i_len == len64) {
216 xfs_efi_log_format_64_t *src_efi_fmt_64 = buf->i_addr;
218 dst_efi_fmt->efi_type = src_efi_fmt_64->efi_type;
219 dst_efi_fmt->efi_size = src_efi_fmt_64->efi_size;
220 dst_efi_fmt->efi_nextents = src_efi_fmt_64->efi_nextents;
221 dst_efi_fmt->efi_id = src_efi_fmt_64->efi_id;
222 for (i = 0; i < dst_efi_fmt->efi_nextents; i++) {
223 dst_efi_fmt->efi_extents[i].ext_start =
224 src_efi_fmt_64->efi_extents[i].ext_start;
225 dst_efi_fmt->efi_extents[i].ext_len =
226 src_efi_fmt_64->efi_extents[i].ext_len;
230 XFS_ERROR_REPORT(__func__, XFS_ERRLEVEL_LOW, NULL);
231 return -EFSCORRUPTED;
234 static inline struct xfs_efd_log_item *EFD_ITEM(struct xfs_log_item *lip)
236 return container_of(lip, struct xfs_efd_log_item, efd_item);
240 xfs_efd_item_free(struct xfs_efd_log_item *efdp)
242 kmem_free(efdp->efd_item.li_lv_shadow);
243 if (efdp->efd_format.efd_nextents > XFS_EFD_MAX_FAST_EXTENTS)
246 kmem_cache_free(xfs_efd_cache, efdp);
250 * This returns the number of iovecs needed to log the given efd item.
251 * We only need 1 iovec for an efd item. It just logs the efd_log_format
256 struct xfs_efd_log_item *efdp)
258 return sizeof(xfs_efd_log_format_t) +
259 (efdp->efd_format.efd_nextents - 1) * sizeof(xfs_extent_t);
264 struct xfs_log_item *lip,
269 *nbytes += xfs_efd_item_sizeof(EFD_ITEM(lip));
273 * This is called to fill in the vector of log iovecs for the
274 * given efd log item. We use only 1 iovec, and we point that
275 * at the efd_log_format structure embedded in the efd item.
276 * It is at this point that we assert that all of the extent
277 * slots in the efd item have been filled.
281 struct xfs_log_item *lip,
282 struct xfs_log_vec *lv)
284 struct xfs_efd_log_item *efdp = EFD_ITEM(lip);
285 struct xfs_log_iovec *vecp = NULL;
287 ASSERT(efdp->efd_next_extent == efdp->efd_format.efd_nextents);
289 efdp->efd_format.efd_type = XFS_LI_EFD;
290 efdp->efd_format.efd_size = 1;
292 xlog_copy_iovec(lv, &vecp, XLOG_REG_TYPE_EFD_FORMAT,
294 xfs_efd_item_sizeof(efdp));
298 * The EFD is either committed or aborted if the transaction is cancelled. If
299 * the transaction is cancelled, drop our reference to the EFI and free the EFD.
302 xfs_efd_item_release(
303 struct xfs_log_item *lip)
305 struct xfs_efd_log_item *efdp = EFD_ITEM(lip);
307 xfs_efi_release(efdp->efd_efip);
308 xfs_efd_item_free(efdp);
311 static struct xfs_log_item *
313 struct xfs_log_item *lip)
315 return &EFD_ITEM(lip)->efd_efip->efi_item;
318 static const struct xfs_item_ops xfs_efd_item_ops = {
319 .flags = XFS_ITEM_RELEASE_WHEN_COMMITTED |
320 XFS_ITEM_INTENT_DONE,
321 .iop_size = xfs_efd_item_size,
322 .iop_format = xfs_efd_item_format,
323 .iop_release = xfs_efd_item_release,
324 .iop_intent = xfs_efd_item_intent,
328 * Allocate an "extent free done" log item that will hold nextents worth of
329 * extents. The caller must use all nextents extents, because we are not
330 * flexible about this at all.
332 static struct xfs_efd_log_item *
334 struct xfs_trans *tp,
335 struct xfs_efi_log_item *efip,
336 unsigned int nextents)
338 struct xfs_efd_log_item *efdp;
340 ASSERT(nextents > 0);
342 if (nextents > XFS_EFD_MAX_FAST_EXTENTS) {
343 efdp = kmem_zalloc(sizeof(struct xfs_efd_log_item) +
344 (nextents - 1) * sizeof(struct xfs_extent),
347 efdp = kmem_cache_zalloc(xfs_efd_cache,
348 GFP_KERNEL | __GFP_NOFAIL);
351 xfs_log_item_init(tp->t_mountp, &efdp->efd_item, XFS_LI_EFD,
353 efdp->efd_efip = efip;
354 efdp->efd_format.efd_nextents = nextents;
355 efdp->efd_format.efd_efi_id = efip->efi_format.efi_id;
357 xfs_trans_add_item(tp, &efdp->efd_item);
362 * Free an extent and log it to the EFD. Note that the transaction is marked
363 * dirty regardless of whether the extent free succeeds or fails to support the
364 * EFI/EFD lifecycle rules.
367 xfs_trans_free_extent(
368 struct xfs_trans *tp,
369 struct xfs_efd_log_item *efdp,
370 xfs_fsblock_t start_block,
371 xfs_extlen_t ext_len,
372 const struct xfs_owner_info *oinfo,
375 struct xfs_mount *mp = tp->t_mountp;
376 struct xfs_extent *extp;
378 xfs_agnumber_t agno = XFS_FSB_TO_AGNO(mp, start_block);
379 xfs_agblock_t agbno = XFS_FSB_TO_AGBNO(mp,
383 trace_xfs_bmap_free_deferred(tp->t_mountp, agno, 0, agbno, ext_len);
385 error = __xfs_free_extent(tp, start_block, ext_len,
386 oinfo, XFS_AG_RESV_NONE, skip_discard);
388 * Mark the transaction dirty, even on error. This ensures the
389 * transaction is aborted, which:
391 * 1.) releases the EFI and frees the EFD
392 * 2.) shuts down the filesystem
394 tp->t_flags |= XFS_TRANS_DIRTY | XFS_TRANS_HAS_INTENT_DONE;
395 set_bit(XFS_LI_DIRTY, &efdp->efd_item.li_flags);
397 next_extent = efdp->efd_next_extent;
398 ASSERT(next_extent < efdp->efd_format.efd_nextents);
399 extp = &(efdp->efd_format.efd_extents[next_extent]);
400 extp->ext_start = start_block;
401 extp->ext_len = ext_len;
402 efdp->efd_next_extent++;
407 /* Sort bmap items by AG. */
409 xfs_extent_free_diff_items(
411 const struct list_head *a,
412 const struct list_head *b)
414 struct xfs_mount *mp = priv;
415 struct xfs_extent_free_item *ra;
416 struct xfs_extent_free_item *rb;
418 ra = container_of(a, struct xfs_extent_free_item, xefi_list);
419 rb = container_of(b, struct xfs_extent_free_item, xefi_list);
420 return XFS_FSB_TO_AGNO(mp, ra->xefi_startblock) -
421 XFS_FSB_TO_AGNO(mp, rb->xefi_startblock);
424 /* Log a free extent to the intent item. */
426 xfs_extent_free_log_item(
427 struct xfs_trans *tp,
428 struct xfs_efi_log_item *efip,
429 struct xfs_extent_free_item *free)
432 struct xfs_extent *extp;
434 tp->t_flags |= XFS_TRANS_DIRTY;
435 set_bit(XFS_LI_DIRTY, &efip->efi_item.li_flags);
438 * atomic_inc_return gives us the value after the increment;
439 * we want to use it as an array index so we need to subtract 1 from
442 next_extent = atomic_inc_return(&efip->efi_next_extent) - 1;
443 ASSERT(next_extent < efip->efi_format.efi_nextents);
444 extp = &efip->efi_format.efi_extents[next_extent];
445 extp->ext_start = free->xefi_startblock;
446 extp->ext_len = free->xefi_blockcount;
449 static struct xfs_log_item *
450 xfs_extent_free_create_intent(
451 struct xfs_trans *tp,
452 struct list_head *items,
456 struct xfs_mount *mp = tp->t_mountp;
457 struct xfs_efi_log_item *efip = xfs_efi_init(mp, count);
458 struct xfs_extent_free_item *free;
462 xfs_trans_add_item(tp, &efip->efi_item);
464 list_sort(mp, items, xfs_extent_free_diff_items);
465 list_for_each_entry(free, items, xefi_list)
466 xfs_extent_free_log_item(tp, efip, free);
467 return &efip->efi_item;
470 /* Get an EFD so we can process all the free extents. */
471 static struct xfs_log_item *
472 xfs_extent_free_create_done(
473 struct xfs_trans *tp,
474 struct xfs_log_item *intent,
477 return &xfs_trans_get_efd(tp, EFI_ITEM(intent), count)->efd_item;
480 /* Process a free extent. */
482 xfs_extent_free_finish_item(
483 struct xfs_trans *tp,
484 struct xfs_log_item *done,
485 struct list_head *item,
486 struct xfs_btree_cur **state)
488 struct xfs_owner_info oinfo = { };
489 struct xfs_extent_free_item *free;
492 free = container_of(item, struct xfs_extent_free_item, xefi_list);
493 oinfo.oi_owner = free->xefi_owner;
494 if (free->xefi_flags & XFS_EFI_ATTR_FORK)
495 oinfo.oi_flags |= XFS_OWNER_INFO_ATTR_FORK;
496 if (free->xefi_flags & XFS_EFI_BMBT_BLOCK)
497 oinfo.oi_flags |= XFS_OWNER_INFO_BMBT_BLOCK;
498 error = xfs_trans_free_extent(tp, EFD_ITEM(done),
499 free->xefi_startblock,
500 free->xefi_blockcount,
501 &oinfo, free->xefi_flags & XFS_EFI_SKIP_DISCARD);
502 kmem_cache_free(xfs_extfree_item_cache, free);
506 /* Abort all pending EFIs. */
508 xfs_extent_free_abort_intent(
509 struct xfs_log_item *intent)
511 xfs_efi_release(EFI_ITEM(intent));
514 /* Cancel a free extent. */
516 xfs_extent_free_cancel_item(
517 struct list_head *item)
519 struct xfs_extent_free_item *free;
521 free = container_of(item, struct xfs_extent_free_item, xefi_list);
522 kmem_cache_free(xfs_extfree_item_cache, free);
525 const struct xfs_defer_op_type xfs_extent_free_defer_type = {
526 .max_items = XFS_EFI_MAX_FAST_EXTENTS,
527 .create_intent = xfs_extent_free_create_intent,
528 .abort_intent = xfs_extent_free_abort_intent,
529 .create_done = xfs_extent_free_create_done,
530 .finish_item = xfs_extent_free_finish_item,
531 .cancel_item = xfs_extent_free_cancel_item,
535 * AGFL blocks are accounted differently in the reserve pools and are not
536 * inserted into the busy extent list.
539 xfs_agfl_free_finish_item(
540 struct xfs_trans *tp,
541 struct xfs_log_item *done,
542 struct list_head *item,
543 struct xfs_btree_cur **state)
545 struct xfs_owner_info oinfo = { };
546 struct xfs_mount *mp = tp->t_mountp;
547 struct xfs_efd_log_item *efdp = EFD_ITEM(done);
548 struct xfs_extent_free_item *free;
549 struct xfs_extent *extp;
550 struct xfs_buf *agbp;
555 struct xfs_perag *pag;
557 free = container_of(item, struct xfs_extent_free_item, xefi_list);
558 ASSERT(free->xefi_blockcount == 1);
559 agno = XFS_FSB_TO_AGNO(mp, free->xefi_startblock);
560 agbno = XFS_FSB_TO_AGBNO(mp, free->xefi_startblock);
561 oinfo.oi_owner = free->xefi_owner;
563 trace_xfs_agfl_free_deferred(mp, agno, 0, agbno, free->xefi_blockcount);
565 pag = xfs_perag_get(mp, agno);
566 error = xfs_alloc_read_agf(pag, tp, 0, &agbp);
568 error = xfs_free_agfl_block(tp, agno, agbno, agbp, &oinfo);
572 * Mark the transaction dirty, even on error. This ensures the
573 * transaction is aborted, which:
575 * 1.) releases the EFI and frees the EFD
576 * 2.) shuts down the filesystem
578 tp->t_flags |= XFS_TRANS_DIRTY;
579 set_bit(XFS_LI_DIRTY, &efdp->efd_item.li_flags);
581 next_extent = efdp->efd_next_extent;
582 ASSERT(next_extent < efdp->efd_format.efd_nextents);
583 extp = &(efdp->efd_format.efd_extents[next_extent]);
584 extp->ext_start = free->xefi_startblock;
585 extp->ext_len = free->xefi_blockcount;
586 efdp->efd_next_extent++;
588 kmem_cache_free(xfs_extfree_item_cache, free);
592 /* sub-type with special handling for AGFL deferred frees */
593 const struct xfs_defer_op_type xfs_agfl_free_defer_type = {
594 .max_items = XFS_EFI_MAX_FAST_EXTENTS,
595 .create_intent = xfs_extent_free_create_intent,
596 .abort_intent = xfs_extent_free_abort_intent,
597 .create_done = xfs_extent_free_create_done,
598 .finish_item = xfs_agfl_free_finish_item,
599 .cancel_item = xfs_extent_free_cancel_item,
602 /* Is this recovered EFI ok? */
604 xfs_efi_validate_ext(
605 struct xfs_mount *mp,
606 struct xfs_extent *extp)
608 return xfs_verify_fsbext(mp, extp->ext_start, extp->ext_len);
612 * Process an extent free intent item that was recovered from
613 * the log. We need to free the extents that it describes.
616 xfs_efi_item_recover(
617 struct xfs_log_item *lip,
618 struct list_head *capture_list)
620 struct xfs_efi_log_item *efip = EFI_ITEM(lip);
621 struct xfs_mount *mp = lip->li_log->l_mp;
622 struct xfs_efd_log_item *efdp;
623 struct xfs_trans *tp;
624 struct xfs_extent *extp;
629 * First check the validity of the extents described by the
630 * EFI. If any are bad, then assume that all are bad and
633 for (i = 0; i < efip->efi_format.efi_nextents; i++) {
634 if (!xfs_efi_validate_ext(mp,
635 &efip->efi_format.efi_extents[i])) {
636 XFS_CORRUPTION_ERROR(__func__, XFS_ERRLEVEL_LOW, mp,
638 sizeof(efip->efi_format));
639 return -EFSCORRUPTED;
643 error = xfs_trans_alloc(mp, &M_RES(mp)->tr_itruncate, 0, 0, 0, &tp);
646 efdp = xfs_trans_get_efd(tp, efip, efip->efi_format.efi_nextents);
648 for (i = 0; i < efip->efi_format.efi_nextents; i++) {
649 extp = &efip->efi_format.efi_extents[i];
650 error = xfs_trans_free_extent(tp, efdp, extp->ext_start,
652 &XFS_RMAP_OINFO_ANY_OWNER, false);
653 if (error == -EFSCORRUPTED)
654 XFS_CORRUPTION_ERROR(__func__, XFS_ERRLEVEL_LOW, mp,
655 extp, sizeof(*extp));
661 return xfs_defer_ops_capture_and_commit(tp, capture_list);
664 xfs_trans_cancel(tp);
670 struct xfs_log_item *lip,
673 return EFI_ITEM(lip)->efi_format.efi_id == intent_id;
676 /* Relog an intent item to push the log tail forward. */
677 static struct xfs_log_item *
679 struct xfs_log_item *intent,
680 struct xfs_trans *tp)
682 struct xfs_efd_log_item *efdp;
683 struct xfs_efi_log_item *efip;
684 struct xfs_extent *extp;
687 count = EFI_ITEM(intent)->efi_format.efi_nextents;
688 extp = EFI_ITEM(intent)->efi_format.efi_extents;
690 tp->t_flags |= XFS_TRANS_DIRTY;
691 efdp = xfs_trans_get_efd(tp, EFI_ITEM(intent), count);
692 efdp->efd_next_extent = count;
693 memcpy(efdp->efd_format.efd_extents, extp, count * sizeof(*extp));
694 set_bit(XFS_LI_DIRTY, &efdp->efd_item.li_flags);
696 efip = xfs_efi_init(tp->t_mountp, count);
697 memcpy(efip->efi_format.efi_extents, extp, count * sizeof(*extp));
698 atomic_set(&efip->efi_next_extent, count);
699 xfs_trans_add_item(tp, &efip->efi_item);
700 set_bit(XFS_LI_DIRTY, &efip->efi_item.li_flags);
701 return &efip->efi_item;
704 static const struct xfs_item_ops xfs_efi_item_ops = {
705 .flags = XFS_ITEM_INTENT,
706 .iop_size = xfs_efi_item_size,
707 .iop_format = xfs_efi_item_format,
708 .iop_unpin = xfs_efi_item_unpin,
709 .iop_release = xfs_efi_item_release,
710 .iop_recover = xfs_efi_item_recover,
711 .iop_match = xfs_efi_item_match,
712 .iop_relog = xfs_efi_item_relog,
716 * This routine is called to create an in-core extent free intent
717 * item from the efi format structure which was logged on disk.
718 * It allocates an in-core efi, copies the extents from the format
719 * structure into it, and adds the efi to the AIL with the given
723 xlog_recover_efi_commit_pass2(
725 struct list_head *buffer_list,
726 struct xlog_recover_item *item,
729 struct xfs_mount *mp = log->l_mp;
730 struct xfs_efi_log_item *efip;
731 struct xfs_efi_log_format *efi_formatp;
734 efi_formatp = item->ri_buf[0].i_addr;
736 efip = xfs_efi_init(mp, efi_formatp->efi_nextents);
737 error = xfs_efi_copy_format(&item->ri_buf[0], &efip->efi_format);
739 xfs_efi_item_free(efip);
742 atomic_set(&efip->efi_next_extent, efi_formatp->efi_nextents);
744 * Insert the intent into the AIL directly and drop one reference so
745 * that finishing or canceling the work will drop the other.
747 xfs_trans_ail_insert(log->l_ailp, &efip->efi_item, lsn);
748 xfs_efi_release(efip);
752 const struct xlog_recover_item_ops xlog_efi_item_ops = {
753 .item_type = XFS_LI_EFI,
754 .commit_pass2 = xlog_recover_efi_commit_pass2,
758 * This routine is called when an EFD format structure is found in a committed
759 * transaction in the log. Its purpose is to cancel the corresponding EFI if it
760 * was still in the log. To do this it searches the AIL for the EFI with an id
761 * equal to that in the EFD format structure. If we find it we drop the EFD
762 * reference, which removes the EFI from the AIL and frees it.
765 xlog_recover_efd_commit_pass2(
767 struct list_head *buffer_list,
768 struct xlog_recover_item *item,
771 struct xfs_efd_log_format *efd_formatp;
773 efd_formatp = item->ri_buf[0].i_addr;
774 ASSERT((item->ri_buf[0].i_len == (sizeof(xfs_efd_log_format_32_t) +
775 ((efd_formatp->efd_nextents - 1) * sizeof(xfs_extent_32_t)))) ||
776 (item->ri_buf[0].i_len == (sizeof(xfs_efd_log_format_64_t) +
777 ((efd_formatp->efd_nextents - 1) * sizeof(xfs_extent_64_t)))));
779 xlog_recover_release_intent(log, XFS_LI_EFI, efd_formatp->efd_efi_id);
783 const struct xlog_recover_item_ops xlog_efd_item_ops = {
784 .item_type = XFS_LI_EFD,
785 .commit_pass2 = xlog_recover_efd_commit_pass2,