Line data Source code
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 :
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
40 59256534 : xfs_bui_item_free(
41 : struct xfs_bui_log_item *buip)
42 : {
43 59256534 : kmem_free(buip->bui_item.li_lv_shadow);
44 59256535 : kmem_cache_free(xfs_bui_cache, buip);
45 59256520 : }
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
55 118475016 : xfs_bui_release(
56 : struct xfs_bui_log_item *buip)
57 : {
58 118475016 : ASSERT(atomic_read(&buip->bui_refcount) > 0);
59 236970208 : if (!atomic_dec_and_test(&buip->bui_refcount))
60 : return;
61 :
62 59256534 : xfs_trans_ail_delete(&buip->bui_item, 0);
63 59256534 : xfs_bui_item_free(buip);
64 : }
65 :
66 :
67 : STATIC void
68 59253997 : xfs_bui_item_size(
69 : struct xfs_log_item *lip,
70 : int *nvecs,
71 : int *nbytes)
72 : {
73 59253997 : struct xfs_bui_log_item *buip = BUI_ITEM(lip);
74 :
75 59253997 : *nvecs += 1;
76 59253997 : *nbytes += xfs_bui_log_format_sizeof(buip->bui_format.bui_nextents);
77 59253997 : }
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
87 59254000 : xfs_bui_item_format(
88 : struct xfs_log_item *lip,
89 : struct xfs_log_vec *lv)
90 : {
91 59254000 : struct xfs_bui_log_item *buip = BUI_ITEM(lip);
92 59254000 : struct xfs_log_iovec *vecp = NULL;
93 :
94 59254000 : ASSERT(atomic_read(&buip->bui_next_extent) ==
95 : buip->bui_format.bui_nextents);
96 :
97 59254000 : buip->bui_format.bui_type = XFS_LI_BUI;
98 59254000 : buip->bui_format.bui_size = 1;
99 :
100 59254000 : xlog_copy_iovec(lv, &vecp, XLOG_REG_TYPE_BUI_FORMAT, &buip->bui_format,
101 59254000 : xfs_bui_log_format_sizeof(buip->bui_format.bui_nextents));
102 59253997 : }
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
113 59253949 : xfs_bui_item_unpin(
114 : struct xfs_log_item *lip,
115 : int remove)
116 : {
117 59253949 : struct xfs_bui_log_item *buip = BUI_ITEM(lip);
118 :
119 59253949 : xfs_bui_release(buip);
120 59253997 : }
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
128 2213 : xfs_bui_item_release(
129 : struct xfs_log_item *lip)
130 : {
131 2213 : xfs_bui_release(BUI_ITEM(lip));
132 2213 : }
133 :
134 : /*
135 : * Allocate and initialize an bui item with the given number of extents.
136 : */
137 : STATIC struct xfs_bui_log_item *
138 59256436 : xfs_bui_init(
139 : struct xfs_mount *mp)
140 :
141 : {
142 59256436 : struct xfs_bui_log_item *buip;
143 :
144 59256436 : buip = kmem_cache_zalloc(xfs_bui_cache, GFP_KERNEL | __GFP_NOFAIL);
145 :
146 59256452 : xfs_log_item_init(mp, &buip->bui_item, XFS_LI_BUI, &xfs_bui_item_ops);
147 59256474 : buip->bui_format.bui_nextents = XFS_BUI_MAX_FAST_EXTENTS;
148 59256474 : buip->bui_format.bui_id = (uintptr_t)(void *)buip;
149 59256474 : atomic_set(&buip->bui_next_extent, 0);
150 59256474 : atomic_set(&buip->bui_refcount, 2);
151 :
152 59256474 : return buip;
153 : }
154 :
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
161 59254027 : xfs_bud_item_size(
162 : struct xfs_log_item *lip,
163 : int *nvecs,
164 : int *nbytes)
165 : {
166 59254027 : *nvecs += 1;
167 59254027 : *nbytes += sizeof(struct xfs_bud_log_format);
168 59254027 : }
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
178 33261 : xfs_bud_item_format(
179 : struct xfs_log_item *lip,
180 : struct xfs_log_vec *lv)
181 : {
182 33261 : struct xfs_bud_log_item *budp = BUD_ITEM(lip);
183 33261 : struct xfs_log_iovec *vecp = NULL;
184 :
185 33261 : budp->bud_format.bud_type = XFS_LI_BUD;
186 33261 : budp->bud_format.bud_size = 1;
187 :
188 33261 : xlog_copy_iovec(lv, &vecp, XLOG_REG_TYPE_BUD_FORMAT, &budp->bud_format,
189 : sizeof(struct xfs_bud_log_format));
190 33261 : }
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
198 59254076 : xfs_bud_item_release(
199 : struct xfs_log_item *lip)
200 : {
201 59254076 : struct xfs_bud_log_item *budp = BUD_ITEM(lip);
202 :
203 59254076 : xfs_bui_release(budp->bud_buip);
204 59254078 : kmem_free(budp->bud_item.li_lv_shadow);
205 59254074 : kmem_cache_free(xfs_bud_cache, budp);
206 59254072 : }
207 :
208 : static struct xfs_log_item *
209 59253969 : xfs_bud_item_intent(
210 : struct xfs_log_item *lip)
211 : {
212 59253969 : 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 : static struct xfs_bud_log_item *
225 59254060 : xfs_trans_get_bud(
226 : struct xfs_trans *tp,
227 : struct xfs_bui_log_item *buip)
228 : {
229 59254060 : struct xfs_bud_log_item *budp;
230 :
231 59254060 : budp = kmem_cache_zalloc(xfs_bud_cache, GFP_KERNEL | __GFP_NOFAIL);
232 59254074 : xfs_log_item_init(tp->t_mountp, &budp->bud_item, XFS_LI_BUD,
233 : &xfs_bud_item_ops);
234 59254074 : budp->bud_buip = buip;
235 59254074 : budp->bud_format.bud_bui_id = buip->bui_format.bui_id;
236 :
237 59254074 : xfs_trans_add_item(tp, &budp->bud_item);
238 59254072 : return budp;
239 : }
240 :
241 : /*
242 : * Finish an bmap update and log it to the BUD. Note that the
243 : * transaction is marked dirty regardless of whether the bmap update
244 : * succeeds or fails to support the BUI/BUD lifecycle rules.
245 : */
246 : static int
247 59254017 : xfs_trans_log_finish_bmap_update(
248 : struct xfs_trans *tp,
249 : struct xfs_bud_log_item *budp,
250 : struct xfs_bmap_intent *bi)
251 : {
252 59254017 : int error;
253 :
254 59254017 : error = xfs_bmap_finish_one(tp, bi);
255 :
256 : /*
257 : * Mark the transaction dirty, even on error. This ensures the
258 : * transaction is aborted, which:
259 : *
260 : * 1.) releases the BUI and frees the BUD
261 : * 2.) shuts down the filesystem
262 : */
263 59254014 : tp->t_flags |= XFS_TRANS_DIRTY | XFS_TRANS_HAS_INTENT_DONE;
264 59254014 : set_bit(XFS_LI_DIRTY, &budp->bud_item.li_flags);
265 :
266 59254017 : return error;
267 : }
268 :
269 : /* Sort bmap intents by inode. */
270 : static int
271 0 : xfs_bmap_update_diff_items(
272 : void *priv,
273 : const struct list_head *a,
274 : const struct list_head *b)
275 : {
276 0 : struct xfs_bmap_intent *ba;
277 0 : struct xfs_bmap_intent *bb;
278 :
279 0 : ba = container_of(a, struct xfs_bmap_intent, bi_list);
280 0 : bb = container_of(b, struct xfs_bmap_intent, bi_list);
281 0 : return ba->bi_owner->i_ino - bb->bi_owner->i_ino;
282 : }
283 :
284 : /* Log bmap updates in the intent item. */
285 : STATIC void
286 59253914 : xfs_bmap_update_log_item(
287 : struct xfs_trans *tp,
288 : struct xfs_bui_log_item *buip,
289 : struct xfs_bmap_intent *bi)
290 : {
291 59253914 : uint next_extent;
292 59253914 : struct xfs_map_extent *map;
293 :
294 59253914 : tp->t_flags |= XFS_TRANS_DIRTY;
295 59253914 : set_bit(XFS_LI_DIRTY, &buip->bui_item.li_flags);
296 :
297 : /*
298 : * atomic_inc_return gives us the value after the increment;
299 : * we want to use it as an array index so we need to subtract 1 from
300 : * it.
301 : */
302 59253923 : next_extent = atomic_inc_return(&buip->bui_next_extent) - 1;
303 59253925 : ASSERT(next_extent < buip->bui_format.bui_nextents);
304 59253925 : map = &buip->bui_format.bui_extents[next_extent];
305 59253925 : map->me_owner = bi->bi_owner->i_ino;
306 59253925 : map->me_startblock = bi->bi_bmap.br_startblock;
307 59253925 : map->me_startoff = bi->bi_bmap.br_startoff;
308 59253925 : map->me_len = bi->bi_bmap.br_blockcount;
309 :
310 59253925 : switch (bi->bi_type) {
311 59253925 : case XFS_BMAP_MAP:
312 : case XFS_BMAP_UNMAP:
313 59253925 : map->me_flags = bi->bi_type;
314 59253925 : break;
315 0 : default:
316 0 : ASSERT(0);
317 : }
318 59253925 : if (bi->bi_bmap.br_state == XFS_EXT_UNWRITTEN)
319 2841807 : map->me_flags |= XFS_BMAP_EXTENT_UNWRITTEN;
320 59253925 : if (bi->bi_whichfork == XFS_ATTR_FORK)
321 218466 : map->me_flags |= XFS_BMAP_EXTENT_ATTR_FORK;
322 59253925 : if (xfs_ifork_is_realtime(bi->bi_owner, bi->bi_whichfork))
323 0 : map->me_flags |= XFS_BMAP_EXTENT_REALTIME;
324 59253924 : }
325 :
326 : static struct xfs_log_item *
327 59253850 : xfs_bmap_update_create_intent(
328 : struct xfs_trans *tp,
329 : struct list_head *items,
330 : unsigned int count,
331 : bool sort)
332 : {
333 59253850 : struct xfs_mount *mp = tp->t_mountp;
334 59253850 : struct xfs_bui_log_item *buip = xfs_bui_init(mp);
335 59253858 : struct xfs_bmap_intent *bi;
336 :
337 59253858 : ASSERT(count == XFS_BUI_MAX_FAST_EXTENTS);
338 :
339 59253858 : xfs_trans_add_item(tp, &buip->bui_item);
340 59253900 : if (sort)
341 59253907 : list_sort(mp, items, xfs_bmap_update_diff_items);
342 118507823 : list_for_each_entry(bi, items, bi_list)
343 59253898 : xfs_bmap_update_log_item(tp, buip, bi);
344 59253925 : return &buip->bui_item;
345 : }
346 :
347 : /* Get an BUD so we can process all the deferred rmap updates. */
348 : static struct xfs_log_item *
349 59253694 : xfs_bmap_update_create_done(
350 : struct xfs_trans *tp,
351 : struct xfs_log_item *intent,
352 : unsigned int count)
353 : {
354 59253694 : return &xfs_trans_get_bud(tp, BUI_ITEM(intent))->bud_item;
355 : }
356 :
357 : /* Take a passive ref to the AG containing the space we're mapping. */
358 : void
359 59254220 : xfs_bmap_update_get_group(
360 : struct xfs_mount *mp,
361 : struct xfs_bmap_intent *bi)
362 : {
363 59254220 : xfs_agnumber_t agno;
364 :
365 59254220 : if (xfs_ifork_is_realtime(bi->bi_owner, bi->bi_whichfork))
366 : return;
367 :
368 59254209 : agno = XFS_FSB_TO_AGNO(mp, bi->bi_bmap.br_startblock);
369 :
370 : /*
371 : * Bump the intent count on behalf of the deferred rmap and refcount
372 : * intent items that that we can queue when we finish this bmap work.
373 : * This new intent item will bump the intent count before the bmap
374 : * intent drops the intent count, ensuring that the intent count
375 : * remains nonzero across the transaction roll.
376 : */
377 59254209 : bi->bi_pag = xfs_perag_intent_get(mp, agno);
378 : }
379 :
380 : /* Release a passive AG ref after finishing mapping work. */
381 : static inline void
382 59254257 : xfs_bmap_update_put_group(
383 : struct xfs_bmap_intent *bi)
384 : {
385 59254257 : if (xfs_ifork_is_realtime(bi->bi_owner, bi->bi_whichfork))
386 : return;
387 :
388 59254257 : xfs_perag_intent_put(bi->bi_pag);
389 : }
390 :
391 : /* Process a deferred rmap update. */
392 : STATIC int
393 59253690 : xfs_bmap_update_finish_item(
394 : struct xfs_trans *tp,
395 : struct xfs_log_item *done,
396 : struct list_head *item,
397 : struct xfs_btree_cur **state)
398 : {
399 59253690 : struct xfs_bmap_intent *bi;
400 59253690 : int error;
401 :
402 59253690 : bi = container_of(item, struct xfs_bmap_intent, bi_list);
403 :
404 59253690 : error = xfs_trans_log_finish_bmap_update(tp, BUD_ITEM(done), bi);
405 59253693 : if (!error && bi->bi_bmap.br_blockcount > 0) {
406 0 : ASSERT(bi->bi_type == XFS_BMAP_UNMAP);
407 0 : return -EAGAIN;
408 : }
409 :
410 59253693 : xfs_bmap_update_put_group(bi);
411 59253690 : kmem_cache_free(xfs_bmap_intent_cache, bi);
412 59253690 : return error;
413 : }
414 :
415 : /* Abort all pending BUIs. */
416 : STATIC void
417 246 : xfs_bmap_update_abort_intent(
418 : struct xfs_log_item *intent)
419 : {
420 246 : xfs_bui_release(BUI_ITEM(intent));
421 246 : }
422 :
423 : /* Cancel a deferred bmap update. */
424 : STATIC void
425 246 : xfs_bmap_update_cancel_item(
426 : struct list_head *item)
427 : {
428 246 : struct xfs_bmap_intent *bi;
429 :
430 246 : bi = container_of(item, struct xfs_bmap_intent, bi_list);
431 :
432 246 : xfs_bmap_update_put_group(bi);
433 246 : kmem_cache_free(xfs_bmap_intent_cache, bi);
434 246 : }
435 :
436 : const struct xfs_defer_op_type xfs_bmap_update_defer_type = {
437 : .max_items = XFS_BUI_MAX_FAST_EXTENTS,
438 : .create_intent = xfs_bmap_update_create_intent,
439 : .abort_intent = xfs_bmap_update_abort_intent,
440 : .create_done = xfs_bmap_update_create_done,
441 : .finish_item = xfs_bmap_update_finish_item,
442 : .cancel_item = xfs_bmap_update_cancel_item,
443 : };
444 :
445 : /* Is this recovered BUI ok? */
446 : static inline bool
447 321 : xfs_bui_validate(
448 : struct xfs_mount *mp,
449 : struct xfs_bui_log_item *buip)
450 : {
451 321 : struct xfs_map_extent *map;
452 :
453 : /* Only one mapping operation per BUI... */
454 321 : if (buip->bui_format.bui_nextents != XFS_BUI_MAX_FAST_EXTENTS)
455 : return false;
456 :
457 321 : map = &buip->bui_format.bui_extents[0];
458 :
459 321 : if (map->me_flags & ~XFS_BMAP_EXTENT_FLAGS)
460 : return false;
461 :
462 321 : switch (map->me_flags & XFS_BMAP_EXTENT_TYPE_MASK) {
463 : case XFS_BMAP_MAP:
464 : case XFS_BMAP_UNMAP:
465 321 : break;
466 : default:
467 : return false;
468 : }
469 :
470 321 : if (!xfs_verify_ino(mp, map->me_owner))
471 : return false;
472 :
473 321 : if (!xfs_verify_fileext(mp, map->me_startoff, map->me_len))
474 : return false;
475 :
476 321 : if (map->me_flags & XFS_BMAP_EXTENT_REALTIME)
477 0 : return xfs_verify_rtext(mp, map->me_startblock, map->me_len);
478 :
479 321 : return xfs_verify_fsbext(mp, map->me_startblock, map->me_len);
480 : }
481 :
482 : /*
483 : * Process a bmap update intent item that was recovered from the log.
484 : * We need to update some inode's bmbt.
485 : */
486 : STATIC int
487 321 : xfs_bui_item_recover(
488 : struct xfs_log_item *lip,
489 : struct list_head *capture_list)
490 : {
491 321 : struct xfs_bmap_intent fake = { };
492 321 : struct xfs_bui_log_item *buip = BUI_ITEM(lip);
493 321 : struct xfs_trans *tp;
494 321 : struct xfs_inode *ip = NULL;
495 321 : struct xfs_mount *mp = lip->li_log->l_mp;
496 321 : struct xfs_map_extent *map;
497 321 : struct xfs_bud_log_item *budp;
498 321 : int iext_delta;
499 321 : int error = 0;
500 :
501 321 : if (!xfs_bui_validate(mp, buip)) {
502 0 : XFS_CORRUPTION_ERROR(__func__, XFS_ERRLEVEL_LOW, mp,
503 : &buip->bui_format, sizeof(buip->bui_format));
504 0 : return -EFSCORRUPTED;
505 : }
506 :
507 321 : map = &buip->bui_format.bui_extents[0];
508 321 : fake.bi_whichfork = (map->me_flags & XFS_BMAP_EXTENT_ATTR_FORK) ?
509 321 : XFS_ATTR_FORK : XFS_DATA_FORK;
510 321 : fake.bi_type = map->me_flags & XFS_BMAP_EXTENT_TYPE_MASK;
511 :
512 321 : error = xlog_recover_iget(mp, map->me_owner, &ip);
513 321 : if (error)
514 : return error;
515 :
516 : /* Allocate transaction and do the work. */
517 321 : error = xfs_trans_alloc(mp, &M_RES(mp)->tr_itruncate,
518 321 : XFS_EXTENTADD_SPACE_RES(mp, XFS_DATA_FORK), 0, 0, &tp);
519 321 : if (error)
520 0 : goto err_rele;
521 :
522 321 : budp = xfs_trans_get_bud(tp, buip);
523 321 : xfs_ilock(ip, XFS_ILOCK_EXCL);
524 321 : xfs_trans_ijoin(tp, ip, 0);
525 :
526 321 : if (!!(map->me_flags & XFS_BMAP_EXTENT_REALTIME) !=
527 321 : xfs_ifork_is_realtime(ip, fake.bi_whichfork)) {
528 0 : error = -EFSCORRUPTED;
529 0 : goto err_cancel;
530 : }
531 :
532 321 : if (fake.bi_type == XFS_BMAP_MAP)
533 : iext_delta = XFS_IEXT_ADD_NOSPLIT_CNT;
534 : else
535 : iext_delta = XFS_IEXT_PUNCH_HOLE_CNT;
536 :
537 321 : error = xfs_iext_count_may_overflow(ip, fake.bi_whichfork, iext_delta);
538 321 : if (error == -EFBIG)
539 0 : error = xfs_iext_count_upgrade(tp, ip, iext_delta);
540 321 : if (error)
541 0 : goto err_cancel;
542 :
543 321 : fake.bi_owner = ip;
544 321 : fake.bi_bmap.br_startblock = map->me_startblock;
545 321 : fake.bi_bmap.br_startoff = map->me_startoff;
546 321 : fake.bi_bmap.br_blockcount = map->me_len;
547 321 : fake.bi_bmap.br_state = (map->me_flags & XFS_BMAP_EXTENT_UNWRITTEN) ?
548 321 : XFS_EXT_UNWRITTEN : XFS_EXT_NORM;
549 :
550 321 : xfs_bmap_update_get_group(mp, &fake);
551 321 : error = xfs_trans_log_finish_bmap_update(tp, budp, &fake);
552 321 : if (error == -EFSCORRUPTED)
553 0 : XFS_CORRUPTION_ERROR(__func__, XFS_ERRLEVEL_LOW, mp, map,
554 : sizeof(*map));
555 321 : xfs_bmap_update_put_group(&fake);
556 321 : if (error)
557 0 : goto err_cancel;
558 :
559 321 : if (fake.bi_bmap.br_blockcount > 0) {
560 0 : ASSERT(fake.bi_type == XFS_BMAP_UNMAP);
561 0 : xfs_bmap_unmap_extent(tp, fake.bi_owner, fake.bi_whichfork,
562 : &fake.bi_bmap);
563 : }
564 :
565 : /*
566 : * Commit transaction, which frees the transaction and saves the inode
567 : * for later replay activities.
568 : */
569 321 : error = xfs_defer_ops_capture_and_commit(tp, capture_list);
570 321 : if (error)
571 0 : goto err_unlock;
572 :
573 321 : xfs_iunlock(ip, XFS_ILOCK_EXCL);
574 321 : xfs_irele(ip);
575 321 : return 0;
576 :
577 0 : err_cancel:
578 0 : xfs_trans_cancel(tp);
579 0 : err_unlock:
580 0 : xfs_iunlock(ip, XFS_ILOCK_EXCL);
581 0 : err_rele:
582 0 : xfs_irele(ip);
583 0 : return error;
584 : }
585 :
586 : STATIC bool
587 2266 : xfs_bui_item_match(
588 : struct xfs_log_item *lip,
589 : uint64_t intent_id)
590 : {
591 2266 : return BUI_ITEM(lip)->bui_format.bui_id == intent_id;
592 : }
593 :
594 : /* Relog an intent item to push the log tail forward. */
595 : static struct xfs_log_item *
596 56 : xfs_bui_item_relog(
597 : struct xfs_log_item *intent,
598 : struct xfs_trans *tp)
599 : {
600 56 : struct xfs_bud_log_item *budp;
601 56 : struct xfs_bui_log_item *buip;
602 56 : struct xfs_map_extent *map;
603 56 : unsigned int count;
604 :
605 56 : count = BUI_ITEM(intent)->bui_format.bui_nextents;
606 56 : map = BUI_ITEM(intent)->bui_format.bui_extents;
607 :
608 56 : tp->t_flags |= XFS_TRANS_DIRTY;
609 56 : budp = xfs_trans_get_bud(tp, BUI_ITEM(intent));
610 56 : set_bit(XFS_LI_DIRTY, &budp->bud_item.li_flags);
611 :
612 56 : buip = xfs_bui_init(tp->t_mountp);
613 112 : memcpy(buip->bui_format.bui_extents, map, count * sizeof(*map));
614 56 : atomic_set(&buip->bui_next_extent, count);
615 56 : xfs_trans_add_item(tp, &buip->bui_item);
616 56 : set_bit(XFS_LI_DIRTY, &buip->bui_item.li_flags);
617 56 : return &buip->bui_item;
618 : }
619 :
620 : static const struct xfs_item_ops xfs_bui_item_ops = {
621 : .flags = XFS_ITEM_INTENT,
622 : .iop_size = xfs_bui_item_size,
623 : .iop_format = xfs_bui_item_format,
624 : .iop_unpin = xfs_bui_item_unpin,
625 : .iop_release = xfs_bui_item_release,
626 : .iop_recover = xfs_bui_item_recover,
627 : .iop_match = xfs_bui_item_match,
628 : .iop_relog = xfs_bui_item_relog,
629 : };
630 :
631 : static inline void
632 2533 : xfs_bui_copy_format(
633 : struct xfs_bui_log_format *dst,
634 : const struct xfs_bui_log_format *src)
635 : {
636 2533 : unsigned int i;
637 :
638 5066 : memcpy(dst, src, offsetof(struct xfs_bui_log_format, bui_extents));
639 :
640 5066 : for (i = 0; i < src->bui_nextents; i++)
641 5066 : memcpy(&dst->bui_extents[i], &src->bui_extents[i],
642 : sizeof(struct xfs_map_extent));
643 2533 : }
644 :
645 : /*
646 : * This routine is called to create an in-core extent bmap update
647 : * item from the bui format structure which was logged on disk.
648 : * It allocates an in-core bui, copies the extents from the format
649 : * structure into it, and adds the bui to the AIL with the given
650 : * LSN.
651 : */
652 : STATIC int
653 2533 : xlog_recover_bui_commit_pass2(
654 : struct xlog *log,
655 : struct list_head *buffer_list,
656 : struct xlog_recover_item *item,
657 : xfs_lsn_t lsn)
658 : {
659 2533 : struct xfs_mount *mp = log->l_mp;
660 2533 : struct xfs_bui_log_item *buip;
661 2533 : struct xfs_bui_log_format *bui_formatp;
662 2533 : size_t len;
663 :
664 2533 : bui_formatp = item->ri_buf[0].i_addr;
665 :
666 2533 : if (item->ri_buf[0].i_len < xfs_bui_log_format_sizeof(0)) {
667 0 : XFS_CORRUPTION_ERROR(__func__, XFS_ERRLEVEL_LOW, mp,
668 : item->ri_buf[0].i_addr, item->ri_buf[0].i_len);
669 0 : return -EFSCORRUPTED;
670 : }
671 :
672 2533 : if (bui_formatp->bui_nextents != XFS_BUI_MAX_FAST_EXTENTS) {
673 0 : XFS_CORRUPTION_ERROR(__func__, XFS_ERRLEVEL_LOW, mp,
674 : item->ri_buf[0].i_addr, item->ri_buf[0].i_len);
675 0 : return -EFSCORRUPTED;
676 : }
677 :
678 2533 : len = xfs_bui_log_format_sizeof(bui_formatp->bui_nextents);
679 2533 : if (item->ri_buf[0].i_len != len) {
680 0 : XFS_CORRUPTION_ERROR(__func__, XFS_ERRLEVEL_LOW, mp,
681 : item->ri_buf[0].i_addr, item->ri_buf[0].i_len);
682 0 : return -EFSCORRUPTED;
683 : }
684 :
685 2533 : buip = xfs_bui_init(mp);
686 2533 : xfs_bui_copy_format(&buip->bui_format, bui_formatp);
687 2533 : atomic_set(&buip->bui_next_extent, bui_formatp->bui_nextents);
688 : /*
689 : * Insert the intent into the AIL directly and drop one reference so
690 : * that finishing or canceling the work will drop the other.
691 : */
692 2533 : xfs_trans_ail_insert(log->l_ailp, &buip->bui_item, lsn);
693 2533 : xfs_bui_release(buip);
694 2533 : return 0;
695 : }
696 :
697 : const struct xlog_recover_item_ops xlog_bui_item_ops = {
698 : .item_type = XFS_LI_BUI,
699 : .commit_pass2 = xlog_recover_bui_commit_pass2,
700 : };
701 :
702 : /*
703 : * This routine is called when an BUD format structure is found in a committed
704 : * transaction in the log. Its purpose is to cancel the corresponding BUI if it
705 : * was still in the log. To do this it searches the AIL for the BUI with an id
706 : * equal to that in the BUD format structure. If we find it we drop the BUD
707 : * reference, which removes the BUI from the AIL and frees it.
708 : */
709 : STATIC int
710 2222 : xlog_recover_bud_commit_pass2(
711 : struct xlog *log,
712 : struct list_head *buffer_list,
713 : struct xlog_recover_item *item,
714 : xfs_lsn_t lsn)
715 : {
716 2222 : struct xfs_bud_log_format *bud_formatp;
717 :
718 2222 : bud_formatp = item->ri_buf[0].i_addr;
719 2222 : if (item->ri_buf[0].i_len != sizeof(struct xfs_bud_log_format)) {
720 0 : XFS_CORRUPTION_ERROR(__func__, XFS_ERRLEVEL_LOW, log->l_mp,
721 : item->ri_buf[0].i_addr, item->ri_buf[0].i_len);
722 0 : return -EFSCORRUPTED;
723 : }
724 :
725 2222 : xlog_recover_release_intent(log, XFS_LI_BUI, bud_formatp->bud_bui_id);
726 2222 : return 0;
727 : }
728 :
729 : const struct xlog_recover_item_ops xlog_bud_item_ops = {
730 : .item_type = XFS_LI_BUD,
731 : .commit_pass2 = xlog_recover_bud_commit_pass2,
732 : };
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