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 : #include "xfs_rtgroup.h"
29 :
30 : struct kmem_cache *xfs_bui_cache;
31 : struct kmem_cache *xfs_bud_cache;
32 :
33 : static const struct xfs_item_ops xfs_bui_item_ops;
34 :
35 : static inline struct xfs_bui_log_item *BUI_ITEM(struct xfs_log_item *lip)
36 : {
37 : return container_of(lip, struct xfs_bui_log_item, bui_item);
38 : }
39 :
40 : STATIC void
41 86543735 : xfs_bui_item_free(
42 : struct xfs_bui_log_item *buip)
43 : {
44 86543735 : kmem_free(buip->bui_item.li_lv_shadow);
45 86543739 : kmem_cache_free(xfs_bui_cache, buip);
46 86543707 : }
47 :
48 : /*
49 : * Freeing the BUI requires that we remove it from the AIL if it has already
50 : * been placed there. However, the BUI may not yet have been placed in the AIL
51 : * when called by xfs_bui_release() from BUD processing due to the ordering of
52 : * committed vs unpin operations in bulk insert operations. Hence the reference
53 : * count to ensure only the last caller frees the BUI.
54 : */
55 : STATIC void
56 173048844 : xfs_bui_release(
57 : struct xfs_bui_log_item *buip)
58 : {
59 173048844 : ASSERT(atomic_read(&buip->bui_refcount) > 0);
60 346124933 : if (!atomic_dec_and_test(&buip->bui_refcount))
61 : return;
62 :
63 86543722 : xfs_trans_ail_delete(&buip->bui_item, 0);
64 86543728 : xfs_bui_item_free(buip);
65 : }
66 :
67 :
68 : STATIC void
69 86541178 : xfs_bui_item_size(
70 : struct xfs_log_item *lip,
71 : int *nvecs,
72 : int *nbytes)
73 : {
74 86541178 : struct xfs_bui_log_item *buip = BUI_ITEM(lip);
75 :
76 86541178 : *nvecs += 1;
77 86541178 : *nbytes += xfs_bui_log_format_sizeof(buip->bui_format.bui_nextents);
78 86541178 : }
79 :
80 : /*
81 : * This is called to fill in the vector of log iovecs for the
82 : * given bui log item. We use only 1 iovec, and we point that
83 : * at the bui_log_format structure embedded in the bui item.
84 : * It is at this point that we assert that all of the extent
85 : * slots in the bui item have been filled.
86 : */
87 : STATIC void
88 86541014 : xfs_bui_item_format(
89 : struct xfs_log_item *lip,
90 : struct xfs_log_vec *lv)
91 : {
92 86541014 : struct xfs_bui_log_item *buip = BUI_ITEM(lip);
93 86541014 : struct xfs_log_iovec *vecp = NULL;
94 :
95 86541014 : ASSERT(atomic_read(&buip->bui_next_extent) ==
96 : buip->bui_format.bui_nextents);
97 :
98 86541014 : buip->bui_format.bui_type = XFS_LI_BUI;
99 86541014 : buip->bui_format.bui_size = 1;
100 :
101 86541014 : xlog_copy_iovec(lv, &vecp, XLOG_REG_TYPE_BUI_FORMAT, &buip->bui_format,
102 86541014 : xfs_bui_log_format_sizeof(buip->bui_format.bui_nextents));
103 86541238 : }
104 :
105 : /*
106 : * The unpin operation is the last place an BUI is manipulated in the log. It is
107 : * either inserted in the AIL or aborted in the event of a log I/O error. In
108 : * either case, the BUI transaction has been successfully committed to make it
109 : * this far. Therefore, we expect whoever committed the BUI to either construct
110 : * and commit the BUD or drop the BUD's reference in the event of error. Simply
111 : * drop the log's BUI reference now that the log is done with it.
112 : */
113 : STATIC void
114 86541193 : xfs_bui_item_unpin(
115 : struct xfs_log_item *lip,
116 : int remove)
117 : {
118 86541193 : struct xfs_bui_log_item *buip = BUI_ITEM(lip);
119 :
120 86541193 : xfs_bui_release(buip);
121 86541255 : }
122 :
123 : /*
124 : * The BUI has been either committed or aborted if the transaction has been
125 : * cancelled. If the transaction was cancelled, an BUD isn't going to be
126 : * constructed and thus we free the BUI here directly.
127 : */
128 : STATIC void
129 2187 : xfs_bui_item_release(
130 : struct xfs_log_item *lip)
131 : {
132 2187 : xfs_bui_release(BUI_ITEM(lip));
133 2187 : }
134 :
135 : /*
136 : * Allocate and initialize an bui item with the given number of extents.
137 : */
138 : STATIC struct xfs_bui_log_item *
139 86542185 : xfs_bui_init(
140 : struct xfs_mount *mp)
141 :
142 : {
143 86542185 : struct xfs_bui_log_item *buip;
144 :
145 86542185 : buip = kmem_cache_zalloc(xfs_bui_cache, GFP_KERNEL | __GFP_NOFAIL);
146 :
147 86542482 : xfs_log_item_init(mp, &buip->bui_item, XFS_LI_BUI, &xfs_bui_item_ops);
148 86542444 : buip->bui_format.bui_nextents = XFS_BUI_MAX_FAST_EXTENTS;
149 86542444 : buip->bui_format.bui_id = (uintptr_t)(void *)buip;
150 86542444 : atomic_set(&buip->bui_next_extent, 0);
151 86542444 : atomic_set(&buip->bui_refcount, 2);
152 :
153 86542444 : return buip;
154 : }
155 :
156 : static inline struct xfs_bud_log_item *BUD_ITEM(struct xfs_log_item *lip)
157 : {
158 : return container_of(lip, struct xfs_bud_log_item, bud_item);
159 : }
160 :
161 : STATIC void
162 86541253 : xfs_bud_item_size(
163 : struct xfs_log_item *lip,
164 : int *nvecs,
165 : int *nbytes)
166 : {
167 86541253 : *nvecs += 1;
168 86541253 : *nbytes += sizeof(struct xfs_bud_log_format);
169 86541253 : }
170 :
171 : /*
172 : * This is called to fill in the vector of log iovecs for the
173 : * given bud log item. We use only 1 iovec, and we point that
174 : * at the bud_log_format structure embedded in the bud item.
175 : * It is at this point that we assert that all of the extent
176 : * slots in the bud item have been filled.
177 : */
178 : STATIC void
179 71514 : xfs_bud_item_format(
180 : struct xfs_log_item *lip,
181 : struct xfs_log_vec *lv)
182 : {
183 71514 : struct xfs_bud_log_item *budp = BUD_ITEM(lip);
184 71514 : struct xfs_log_iovec *vecp = NULL;
185 :
186 71514 : budp->bud_format.bud_type = XFS_LI_BUD;
187 71514 : budp->bud_format.bud_size = 1;
188 :
189 71514 : xlog_copy_iovec(lv, &vecp, XLOG_REG_TYPE_BUD_FORMAT, &budp->bud_format,
190 : sizeof(struct xfs_bud_log_format));
191 71514 : }
192 :
193 : /*
194 : * The BUD is either committed or aborted if the transaction is cancelled. If
195 : * the transaction is cancelled, drop our reference to the BUI and free the
196 : * BUD.
197 : */
198 : STATIC void
199 86541319 : xfs_bud_item_release(
200 : struct xfs_log_item *lip)
201 : {
202 86541319 : struct xfs_bud_log_item *budp = BUD_ITEM(lip);
203 :
204 86541319 : xfs_bui_release(budp->bud_buip);
205 86541316 : kmem_free(budp->bud_item.li_lv_shadow);
206 86541322 : kmem_cache_free(xfs_bud_cache, budp);
207 86541316 : }
208 :
209 : static struct xfs_log_item *
210 86541090 : xfs_bud_item_intent(
211 : struct xfs_log_item *lip)
212 : {
213 86541090 : return &BUD_ITEM(lip)->bud_buip->bui_item;
214 : }
215 :
216 : static const struct xfs_item_ops xfs_bud_item_ops = {
217 : .flags = XFS_ITEM_RELEASE_WHEN_COMMITTED |
218 : XFS_ITEM_INTENT_DONE,
219 : .iop_size = xfs_bud_item_size,
220 : .iop_format = xfs_bud_item_format,
221 : .iop_release = xfs_bud_item_release,
222 : .iop_intent = xfs_bud_item_intent,
223 : };
224 :
225 : static struct xfs_bud_log_item *
226 86540950 : xfs_trans_get_bud(
227 : struct xfs_trans *tp,
228 : struct xfs_bui_log_item *buip)
229 : {
230 86540950 : struct xfs_bud_log_item *budp;
231 :
232 86540950 : budp = kmem_cache_zalloc(xfs_bud_cache, GFP_KERNEL | __GFP_NOFAIL);
233 86541163 : xfs_log_item_init(tp->t_mountp, &budp->bud_item, XFS_LI_BUD,
234 : &xfs_bud_item_ops);
235 86541164 : budp->bud_buip = buip;
236 86541164 : budp->bud_format.bud_bui_id = buip->bui_format.bui_id;
237 :
238 86541164 : xfs_trans_add_item(tp, &budp->bud_item);
239 86541150 : return budp;
240 : }
241 :
242 : /*
243 : * Finish an bmap update and log it to the BUD. Note that the
244 : * transaction is marked dirty regardless of whether the bmap update
245 : * succeeds or fails to support the BUI/BUD lifecycle rules.
246 : */
247 : static int
248 86540932 : xfs_trans_log_finish_bmap_update(
249 : struct xfs_trans *tp,
250 : struct xfs_bud_log_item *budp,
251 : struct xfs_bmap_intent *bi)
252 : {
253 86540932 : int error;
254 :
255 86540932 : error = xfs_bmap_finish_one(tp, bi);
256 :
257 : /*
258 : * Mark the transaction dirty, even on error. This ensures the
259 : * transaction is aborted, which:
260 : *
261 : * 1.) releases the BUI and frees the BUD
262 : * 2.) shuts down the filesystem
263 : */
264 86541043 : tp->t_flags |= XFS_TRANS_DIRTY | XFS_TRANS_HAS_INTENT_DONE;
265 86541043 : set_bit(XFS_LI_DIRTY, &budp->bud_item.li_flags);
266 :
267 86541076 : return error;
268 : }
269 :
270 : /* Sort bmap intents by inode. */
271 : static int
272 0 : xfs_bmap_update_diff_items(
273 : void *priv,
274 : const struct list_head *a,
275 : const struct list_head *b)
276 : {
277 0 : struct xfs_bmap_intent *ba;
278 0 : struct xfs_bmap_intent *bb;
279 :
280 0 : ba = container_of(a, struct xfs_bmap_intent, bi_list);
281 0 : bb = container_of(b, struct xfs_bmap_intent, bi_list);
282 0 : return ba->bi_owner->i_ino - bb->bi_owner->i_ino;
283 : }
284 :
285 : /* Log bmap updates in the intent item. */
286 : STATIC void
287 86540669 : xfs_bmap_update_log_item(
288 : struct xfs_trans *tp,
289 : struct xfs_bui_log_item *buip,
290 : struct xfs_bmap_intent *bi)
291 : {
292 86540669 : uint next_extent;
293 86540669 : struct xfs_map_extent *map;
294 :
295 86540669 : tp->t_flags |= XFS_TRANS_DIRTY;
296 86540669 : set_bit(XFS_LI_DIRTY, &buip->bui_item.li_flags);
297 :
298 : /*
299 : * atomic_inc_return gives us the value after the increment;
300 : * we want to use it as an array index so we need to subtract 1 from
301 : * it.
302 : */
303 86540710 : next_extent = atomic_inc_return(&buip->bui_next_extent) - 1;
304 86540651 : ASSERT(next_extent < buip->bui_format.bui_nextents);
305 86540651 : map = &buip->bui_format.bui_extents[next_extent];
306 86540651 : map->me_owner = bi->bi_owner->i_ino;
307 86540651 : map->me_startblock = bi->bi_bmap.br_startblock;
308 86540651 : map->me_startoff = bi->bi_bmap.br_startoff;
309 86540651 : map->me_len = bi->bi_bmap.br_blockcount;
310 :
311 86540651 : switch (bi->bi_type) {
312 86540651 : case XFS_BMAP_MAP:
313 : case XFS_BMAP_UNMAP:
314 86540651 : map->me_flags = bi->bi_type;
315 86540651 : break;
316 0 : default:
317 0 : ASSERT(0);
318 : }
319 86540651 : if (bi->bi_bmap.br_state == XFS_EXT_UNWRITTEN)
320 8477930 : map->me_flags |= XFS_BMAP_EXTENT_UNWRITTEN;
321 86540651 : if (bi->bi_whichfork == XFS_ATTR_FORK)
322 214323 : map->me_flags |= XFS_BMAP_EXTENT_ATTR_FORK;
323 86540651 : if (xfs_ifork_is_realtime(bi->bi_owner, bi->bi_whichfork))
324 22248131 : map->me_flags |= XFS_BMAP_EXTENT_REALTIME;
325 86540673 : }
326 :
327 : static struct xfs_log_item *
328 86539317 : xfs_bmap_update_create_intent(
329 : struct xfs_trans *tp,
330 : struct list_head *items,
331 : unsigned int count,
332 : bool sort)
333 : {
334 86539317 : struct xfs_mount *mp = tp->t_mountp;
335 86539317 : struct xfs_bui_log_item *buip = xfs_bui_init(mp);
336 86539703 : struct xfs_bmap_intent *bi;
337 :
338 86539703 : ASSERT(count == XFS_BUI_MAX_FAST_EXTENTS);
339 :
340 86539703 : xfs_trans_add_item(tp, &buip->bui_item);
341 86540654 : if (sort)
342 86540774 : list_sort(mp, items, xfs_bmap_update_diff_items);
343 173080650 : list_for_each_entry(bi, items, bi_list)
344 86540170 : xfs_bmap_update_log_item(tp, buip, bi);
345 86540480 : return &buip->bui_item;
346 : }
347 :
348 : /* Get an BUD so we can process all the deferred rmap updates. */
349 : static struct xfs_log_item *
350 86540598 : xfs_bmap_update_create_done(
351 : struct xfs_trans *tp,
352 : struct xfs_log_item *intent,
353 : unsigned int count)
354 : {
355 86540598 : return &xfs_trans_get_bud(tp, BUI_ITEM(intent))->bud_item;
356 : }
357 :
358 : /* Take a passive ref to the AG containing the space we're mapping. */
359 : void
360 86540376 : xfs_bmap_update_get_group(
361 : struct xfs_mount *mp,
362 : struct xfs_bmap_intent *bi)
363 : {
364 86540376 : xfs_agnumber_t agno;
365 :
366 86540376 : if (xfs_ifork_is_realtime(bi->bi_owner, bi->bi_whichfork)) {
367 22248249 : if (xfs_has_rtgroups(mp)) {
368 22248249 : xfs_rgnumber_t rgno;
369 :
370 22248249 : rgno = xfs_rtb_to_rgno(mp, bi->bi_bmap.br_startblock);
371 22247404 : bi->bi_rtg = xfs_rtgroup_intent_get(mp, rgno);
372 : } else {
373 0 : bi->bi_rtg = NULL;
374 : }
375 :
376 22247215 : return;
377 : }
378 :
379 64292813 : agno = XFS_FSB_TO_AGNO(mp, bi->bi_bmap.br_startblock);
380 :
381 : /*
382 : * Bump the intent count on behalf of the deferred rmap and refcount
383 : * intent items that that we can queue when we finish this bmap work.
384 : * This new intent item will bump the intent count before the bmap
385 : * intent drops the intent count, ensuring that the intent count
386 : * remains nonzero across the transaction roll.
387 : */
388 64292813 : bi->bi_pag = xfs_perag_intent_get(mp, agno);
389 : }
390 :
391 : /* Release a passive AG ref after finishing mapping work. */
392 : static inline void
393 86541258 : xfs_bmap_update_put_group(
394 : struct xfs_bmap_intent *bi)
395 : {
396 86541258 : if (xfs_ifork_is_realtime(bi->bi_owner, bi->bi_whichfork)) {
397 22248419 : if (xfs_has_rtgroups(bi->bi_owner->i_mount)) {
398 22248417 : xfs_rtgroup_intent_put(bi->bi_rtg);
399 : }
400 22248440 : return;
401 : }
402 :
403 64292836 : xfs_perag_intent_put(bi->bi_pag);
404 : }
405 :
406 : /* Process a deferred rmap update. */
407 : STATIC int
408 86540739 : xfs_bmap_update_finish_item(
409 : struct xfs_trans *tp,
410 : struct xfs_log_item *done,
411 : struct list_head *item,
412 : struct xfs_btree_cur **state)
413 : {
414 86540739 : struct xfs_bmap_intent *bi;
415 86540739 : int error;
416 :
417 86540739 : bi = container_of(item, struct xfs_bmap_intent, bi_list);
418 :
419 86540739 : error = xfs_trans_log_finish_bmap_update(tp, BUD_ITEM(done), bi);
420 86540767 : if (!error && bi->bi_bmap.br_blockcount > 0) {
421 0 : ASSERT(bi->bi_type == XFS_BMAP_UNMAP);
422 0 : return -EAGAIN;
423 : }
424 :
425 86540767 : xfs_bmap_update_put_group(bi);
426 86540770 : kmem_cache_free(xfs_bmap_intent_cache, bi);
427 86540770 : return error;
428 : }
429 :
430 : /* Abort all pending BUIs. */
431 : STATIC void
432 227 : xfs_bmap_update_abort_intent(
433 : struct xfs_log_item *intent)
434 : {
435 227 : xfs_bui_release(BUI_ITEM(intent));
436 227 : }
437 :
438 : /* Cancel a deferred bmap update. */
439 : STATIC void
440 227 : xfs_bmap_update_cancel_item(
441 : struct list_head *item)
442 : {
443 227 : struct xfs_bmap_intent *bi;
444 :
445 227 : bi = container_of(item, struct xfs_bmap_intent, bi_list);
446 :
447 227 : xfs_bmap_update_put_group(bi);
448 227 : kmem_cache_free(xfs_bmap_intent_cache, bi);
449 227 : }
450 :
451 : const struct xfs_defer_op_type xfs_bmap_update_defer_type = {
452 : .max_items = XFS_BUI_MAX_FAST_EXTENTS,
453 : .create_intent = xfs_bmap_update_create_intent,
454 : .abort_intent = xfs_bmap_update_abort_intent,
455 : .create_done = xfs_bmap_update_create_done,
456 : .finish_item = xfs_bmap_update_finish_item,
457 : .cancel_item = xfs_bmap_update_cancel_item,
458 : };
459 :
460 : /* Is this recovered BUI ok? */
461 : static inline bool
462 286 : xfs_bui_validate(
463 : struct xfs_mount *mp,
464 : struct xfs_bui_log_item *buip)
465 : {
466 286 : struct xfs_map_extent *map;
467 :
468 : /* Only one mapping operation per BUI... */
469 286 : if (buip->bui_format.bui_nextents != XFS_BUI_MAX_FAST_EXTENTS)
470 : return false;
471 :
472 286 : map = &buip->bui_format.bui_extents[0];
473 :
474 286 : if (map->me_flags & ~XFS_BMAP_EXTENT_FLAGS)
475 : return false;
476 :
477 286 : switch (map->me_flags & XFS_BMAP_EXTENT_TYPE_MASK) {
478 : case XFS_BMAP_MAP:
479 : case XFS_BMAP_UNMAP:
480 286 : break;
481 : default:
482 : return false;
483 : }
484 :
485 286 : if (!xfs_verify_ino(mp, map->me_owner))
486 : return false;
487 :
488 286 : if (!xfs_verify_fileext(mp, map->me_startoff, map->me_len))
489 : return false;
490 :
491 286 : if (map->me_flags & XFS_BMAP_EXTENT_REALTIME)
492 0 : return xfs_verify_rtbext(mp, map->me_startblock, map->me_len);
493 :
494 286 : return xfs_verify_fsbext(mp, map->me_startblock, map->me_len);
495 : }
496 :
497 : /*
498 : * Process a bmap update intent item that was recovered from the log.
499 : * We need to update some inode's bmbt.
500 : */
501 : STATIC int
502 286 : xfs_bui_item_recover(
503 : struct xfs_log_item *lip,
504 : struct list_head *capture_list)
505 : {
506 286 : struct xfs_bmap_intent fake = { };
507 286 : struct xfs_bui_log_item *buip = BUI_ITEM(lip);
508 286 : struct xfs_trans *tp;
509 286 : struct xfs_inode *ip = NULL;
510 286 : struct xfs_mount *mp = lip->li_log->l_mp;
511 286 : struct xfs_map_extent *map;
512 286 : struct xfs_bud_log_item *budp;
513 286 : int iext_delta;
514 286 : int error = 0;
515 :
516 286 : if (!xfs_bui_validate(mp, buip)) {
517 0 : XFS_CORRUPTION_ERROR(__func__, XFS_ERRLEVEL_LOW, mp,
518 : &buip->bui_format, sizeof(buip->bui_format));
519 0 : return -EFSCORRUPTED;
520 : }
521 :
522 286 : map = &buip->bui_format.bui_extents[0];
523 286 : fake.bi_whichfork = (map->me_flags & XFS_BMAP_EXTENT_ATTR_FORK) ?
524 286 : XFS_ATTR_FORK : XFS_DATA_FORK;
525 286 : fake.bi_type = map->me_flags & XFS_BMAP_EXTENT_TYPE_MASK;
526 :
527 286 : error = xlog_recover_iget(mp, map->me_owner, &ip);
528 286 : if (error)
529 : return error;
530 :
531 : /* Allocate transaction and do the work. */
532 286 : error = xfs_trans_alloc(mp, &M_RES(mp)->tr_itruncate,
533 286 : XFS_EXTENTADD_SPACE_RES(mp, XFS_DATA_FORK), 0, 0, &tp);
534 286 : if (error)
535 0 : goto err_rele;
536 :
537 286 : budp = xfs_trans_get_bud(tp, buip);
538 286 : xfs_ilock(ip, XFS_ILOCK_EXCL);
539 286 : xfs_trans_ijoin(tp, ip, 0);
540 :
541 286 : if (!!(map->me_flags & XFS_BMAP_EXTENT_REALTIME) !=
542 286 : xfs_ifork_is_realtime(ip, fake.bi_whichfork)) {
543 0 : error = -EFSCORRUPTED;
544 0 : goto err_cancel;
545 : }
546 :
547 286 : if (fake.bi_type == XFS_BMAP_MAP)
548 : iext_delta = XFS_IEXT_ADD_NOSPLIT_CNT;
549 : else
550 : iext_delta = XFS_IEXT_PUNCH_HOLE_CNT;
551 :
552 286 : error = xfs_iext_count_may_overflow(ip, fake.bi_whichfork, iext_delta);
553 286 : if (error == -EFBIG)
554 0 : error = xfs_iext_count_upgrade(tp, ip, iext_delta);
555 286 : if (error)
556 0 : goto err_cancel;
557 :
558 286 : fake.bi_owner = ip;
559 286 : fake.bi_bmap.br_startblock = map->me_startblock;
560 286 : fake.bi_bmap.br_startoff = map->me_startoff;
561 286 : fake.bi_bmap.br_blockcount = map->me_len;
562 286 : fake.bi_bmap.br_state = (map->me_flags & XFS_BMAP_EXTENT_UNWRITTEN) ?
563 286 : XFS_EXT_UNWRITTEN : XFS_EXT_NORM;
564 :
565 286 : xfs_bmap_update_get_group(mp, &fake);
566 286 : error = xfs_trans_log_finish_bmap_update(tp, budp, &fake);
567 286 : if (error == -EFSCORRUPTED)
568 0 : XFS_CORRUPTION_ERROR(__func__, XFS_ERRLEVEL_LOW, mp, map,
569 : sizeof(*map));
570 286 : xfs_bmap_update_put_group(&fake);
571 286 : if (error)
572 0 : goto err_cancel;
573 :
574 286 : if (fake.bi_bmap.br_blockcount > 0) {
575 0 : ASSERT(fake.bi_type == XFS_BMAP_UNMAP);
576 0 : xfs_bmap_unmap_extent(tp, fake.bi_owner, fake.bi_whichfork,
577 : &fake.bi_bmap);
578 : }
579 :
580 : /*
581 : * Commit transaction, which frees the transaction and saves the inode
582 : * for later replay activities.
583 : */
584 286 : error = xfs_defer_ops_capture_and_commit(tp, capture_list);
585 286 : if (error)
586 0 : goto err_unlock;
587 :
588 286 : xfs_iunlock(ip, XFS_ILOCK_EXCL);
589 286 : xfs_irele(ip);
590 286 : return 0;
591 :
592 0 : err_cancel:
593 0 : xfs_trans_cancel(tp);
594 0 : err_unlock:
595 0 : xfs_iunlock(ip, XFS_ILOCK_EXCL);
596 0 : err_rele:
597 0 : xfs_irele(ip);
598 0 : return error;
599 : }
600 :
601 : STATIC bool
602 2187 : xfs_bui_item_match(
603 : struct xfs_log_item *lip,
604 : uint64_t intent_id)
605 : {
606 2187 : return BUI_ITEM(lip)->bui_format.bui_id == intent_id;
607 : }
608 :
609 : /* Relog an intent item to push the log tail forward. */
610 : static struct xfs_log_item *
611 173 : xfs_bui_item_relog(
612 : struct xfs_log_item *intent,
613 : struct xfs_trans *tp)
614 : {
615 173 : struct xfs_bud_log_item *budp;
616 173 : struct xfs_bui_log_item *buip;
617 173 : struct xfs_map_extent *map;
618 173 : unsigned int count;
619 :
620 173 : count = BUI_ITEM(intent)->bui_format.bui_nextents;
621 173 : map = BUI_ITEM(intent)->bui_format.bui_extents;
622 :
623 173 : tp->t_flags |= XFS_TRANS_DIRTY;
624 173 : budp = xfs_trans_get_bud(tp, BUI_ITEM(intent));
625 173 : set_bit(XFS_LI_DIRTY, &budp->bud_item.li_flags);
626 :
627 173 : buip = xfs_bui_init(tp->t_mountp);
628 346 : memcpy(buip->bui_format.bui_extents, map, count * sizeof(*map));
629 173 : atomic_set(&buip->bui_next_extent, count);
630 173 : xfs_trans_add_item(tp, &buip->bui_item);
631 173 : set_bit(XFS_LI_DIRTY, &buip->bui_item.li_flags);
632 173 : return &buip->bui_item;
633 : }
634 :
635 : static const struct xfs_item_ops xfs_bui_item_ops = {
636 : .flags = XFS_ITEM_INTENT,
637 : .iop_size = xfs_bui_item_size,
638 : .iop_format = xfs_bui_item_format,
639 : .iop_unpin = xfs_bui_item_unpin,
640 : .iop_release = xfs_bui_item_release,
641 : .iop_recover = xfs_bui_item_recover,
642 : .iop_match = xfs_bui_item_match,
643 : .iop_relog = xfs_bui_item_relog,
644 : };
645 :
646 : static inline void
647 2473 : xfs_bui_copy_format(
648 : struct xfs_bui_log_format *dst,
649 : const struct xfs_bui_log_format *src)
650 : {
651 2473 : unsigned int i;
652 :
653 4946 : memcpy(dst, src, offsetof(struct xfs_bui_log_format, bui_extents));
654 :
655 4946 : for (i = 0; i < src->bui_nextents; i++)
656 4946 : memcpy(&dst->bui_extents[i], &src->bui_extents[i],
657 : sizeof(struct xfs_map_extent));
658 2473 : }
659 :
660 : /*
661 : * This routine is called to create an in-core extent bmap update
662 : * item from the bui format structure which was logged on disk.
663 : * It allocates an in-core bui, copies the extents from the format
664 : * structure into it, and adds the bui to the AIL with the given
665 : * LSN.
666 : */
667 : STATIC int
668 2473 : xlog_recover_bui_commit_pass2(
669 : struct xlog *log,
670 : struct list_head *buffer_list,
671 : struct xlog_recover_item *item,
672 : xfs_lsn_t lsn)
673 : {
674 2473 : struct xfs_mount *mp = log->l_mp;
675 2473 : struct xfs_bui_log_item *buip;
676 2473 : struct xfs_bui_log_format *bui_formatp;
677 2473 : size_t len;
678 :
679 2473 : bui_formatp = item->ri_buf[0].i_addr;
680 :
681 2473 : if (item->ri_buf[0].i_len < xfs_bui_log_format_sizeof(0)) {
682 0 : XFS_CORRUPTION_ERROR(__func__, XFS_ERRLEVEL_LOW, mp,
683 : item->ri_buf[0].i_addr, item->ri_buf[0].i_len);
684 0 : return -EFSCORRUPTED;
685 : }
686 :
687 2473 : if (bui_formatp->bui_nextents != XFS_BUI_MAX_FAST_EXTENTS) {
688 0 : XFS_CORRUPTION_ERROR(__func__, XFS_ERRLEVEL_LOW, mp,
689 : item->ri_buf[0].i_addr, item->ri_buf[0].i_len);
690 0 : return -EFSCORRUPTED;
691 : }
692 :
693 2473 : len = xfs_bui_log_format_sizeof(bui_formatp->bui_nextents);
694 2473 : if (item->ri_buf[0].i_len != len) {
695 0 : XFS_CORRUPTION_ERROR(__func__, XFS_ERRLEVEL_LOW, mp,
696 : item->ri_buf[0].i_addr, item->ri_buf[0].i_len);
697 0 : return -EFSCORRUPTED;
698 : }
699 :
700 2473 : buip = xfs_bui_init(mp);
701 2473 : xfs_bui_copy_format(&buip->bui_format, bui_formatp);
702 2473 : atomic_set(&buip->bui_next_extent, bui_formatp->bui_nextents);
703 : /*
704 : * Insert the intent into the AIL directly and drop one reference so
705 : * that finishing or canceling the work will drop the other.
706 : */
707 2473 : xfs_trans_ail_insert(log->l_ailp, &buip->bui_item, lsn);
708 2473 : xfs_bui_release(buip);
709 2473 : return 0;
710 : }
711 :
712 : const struct xlog_recover_item_ops xlog_bui_item_ops = {
713 : .item_type = XFS_LI_BUI,
714 : .commit_pass2 = xlog_recover_bui_commit_pass2,
715 : };
716 :
717 : /*
718 : * This routine is called when an BUD format structure is found in a committed
719 : * transaction in the log. Its purpose is to cancel the corresponding BUI if it
720 : * was still in the log. To do this it searches the AIL for the BUI with an id
721 : * equal to that in the BUD format structure. If we find it we drop the BUD
722 : * reference, which removes the BUI from the AIL and frees it.
723 : */
724 : STATIC int
725 2188 : xlog_recover_bud_commit_pass2(
726 : struct xlog *log,
727 : struct list_head *buffer_list,
728 : struct xlog_recover_item *item,
729 : xfs_lsn_t lsn)
730 : {
731 2188 : struct xfs_bud_log_format *bud_formatp;
732 :
733 2188 : bud_formatp = item->ri_buf[0].i_addr;
734 2188 : if (item->ri_buf[0].i_len != sizeof(struct xfs_bud_log_format)) {
735 0 : XFS_CORRUPTION_ERROR(__func__, XFS_ERRLEVEL_LOW, log->l_mp,
736 : item->ri_buf[0].i_addr, item->ri_buf[0].i_len);
737 0 : return -EFSCORRUPTED;
738 : }
739 :
740 2188 : xlog_recover_release_intent(log, XFS_LI_BUI, bud_formatp->bud_bui_id);
741 2188 : return 0;
742 : }
743 :
744 : const struct xlog_recover_item_ops xlog_bud_item_ops = {
745 : .item_type = XFS_LI_BUD,
746 : .commit_pass2 = xlog_recover_bud_commit_pass2,
747 : };
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