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 105931384 : xfs_bui_item_free(
41 : struct xfs_bui_log_item *buip)
42 : {
43 105931384 : kmem_free(buip->bui_item.li_lv_shadow);
44 105931401 : kmem_cache_free(xfs_bui_cache, buip);
45 105931499 : }
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 211848139 : xfs_bui_release(
56 : struct xfs_bui_log_item *buip)
57 : {
58 211848139 : ASSERT(atomic_read(&buip->bui_refcount) > 0);
59 211848139 : if (!atomic_dec_and_test(&buip->bui_refcount))
60 : return;
61 :
62 105931222 : xfs_trans_ail_delete(&buip->bui_item, 0);
63 105931409 : xfs_bui_item_free(buip);
64 : }
65 :
66 :
67 : STATIC void
68 105928253 : xfs_bui_item_size(
69 : struct xfs_log_item *lip,
70 : int *nvecs,
71 : int *nbytes)
72 : {
73 105928253 : struct xfs_bui_log_item *buip = BUI_ITEM(lip);
74 :
75 105928253 : *nvecs += 1;
76 105928253 : *nbytes += xfs_bui_log_format_sizeof(buip->bui_format.bui_nextents);
77 105928253 : }
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 105928187 : xfs_bui_item_format(
88 : struct xfs_log_item *lip,
89 : struct xfs_log_vec *lv)
90 : {
91 105928187 : struct xfs_bui_log_item *buip = BUI_ITEM(lip);
92 105928187 : struct xfs_log_iovec *vecp = NULL;
93 :
94 105928187 : ASSERT(atomic_read(&buip->bui_next_extent) ==
95 : buip->bui_format.bui_nextents);
96 :
97 105928187 : buip->bui_format.bui_type = XFS_LI_BUI;
98 105928187 : buip->bui_format.bui_size = 1;
99 :
100 105928187 : xlog_copy_iovec(lv, &vecp, XLOG_REG_TYPE_BUI_FORMAT, &buip->bui_format,
101 105928187 : xfs_bui_log_format_sizeof(buip->bui_format.bui_nextents));
102 105927976 : }
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 105927756 : xfs_bui_item_unpin(
114 : struct xfs_log_item *lip,
115 : int remove)
116 : {
117 105927756 : struct xfs_bui_log_item *buip = BUI_ITEM(lip);
118 :
119 105927756 : xfs_bui_release(buip);
120 105928256 : }
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 2774 : xfs_bui_item_release(
129 : struct xfs_log_item *lip)
130 : {
131 2774 : xfs_bui_release(BUI_ITEM(lip));
132 2774 : }
133 :
134 : /*
135 : * Allocate and initialize an bui item with the given number of extents.
136 : */
137 : STATIC struct xfs_bui_log_item *
138 105930257 : xfs_bui_init(
139 : struct xfs_mount *mp)
140 :
141 : {
142 105930257 : struct xfs_bui_log_item *buip;
143 :
144 105930257 : buip = kmem_cache_zalloc(xfs_bui_cache, GFP_KERNEL | __GFP_NOFAIL);
145 :
146 105931164 : xfs_log_item_init(mp, &buip->bui_item, XFS_LI_BUI, &xfs_bui_item_ops);
147 105930731 : buip->bui_format.bui_nextents = XFS_BUI_MAX_FAST_EXTENTS;
148 105930731 : buip->bui_format.bui_id = (uintptr_t)(void *)buip;
149 105930731 : atomic_set(&buip->bui_next_extent, 0);
150 105930731 : atomic_set(&buip->bui_refcount, 2);
151 :
152 105930731 : 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 105928311 : xfs_bud_item_size(
162 : struct xfs_log_item *lip,
163 : int *nvecs,
164 : int *nbytes)
165 : {
166 105928311 : *nvecs += 1;
167 105928311 : *nbytes += sizeof(struct xfs_bud_log_format);
168 105928311 : }
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 84510 : xfs_bud_item_format(
179 : struct xfs_log_item *lip,
180 : struct xfs_log_vec *lv)
181 : {
182 84510 : struct xfs_bud_log_item *budp = BUD_ITEM(lip);
183 84510 : struct xfs_log_iovec *vecp = NULL;
184 :
185 84510 : budp->bud_format.bud_type = XFS_LI_BUD;
186 84510 : budp->bud_format.bud_size = 1;
187 :
188 84510 : xlog_copy_iovec(lv, &vecp, XLOG_REG_TYPE_BUD_FORMAT, &budp->bud_format,
189 : sizeof(struct xfs_bud_log_format));
190 84510 : }
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 105928357 : xfs_bud_item_release(
199 : struct xfs_log_item *lip)
200 : {
201 105928357 : struct xfs_bud_log_item *budp = BUD_ITEM(lip);
202 :
203 105928357 : xfs_bui_release(budp->bud_buip);
204 105928414 : kmem_free(budp->bud_item.li_lv_shadow);
205 105928379 : kmem_cache_free(xfs_bud_cache, budp);
206 105928291 : }
207 :
208 : static struct xfs_log_item *
209 105887369 : xfs_bud_item_intent(
210 : struct xfs_log_item *lip)
211 : {
212 105887369 : 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 105927932 : xfs_trans_get_bud(
226 : struct xfs_trans *tp,
227 : struct xfs_bui_log_item *buip)
228 : {
229 105927932 : struct xfs_bud_log_item *budp;
230 :
231 105927932 : budp = kmem_cache_zalloc(xfs_bud_cache, GFP_KERNEL | __GFP_NOFAIL);
232 105928311 : xfs_log_item_init(tp->t_mountp, &budp->bud_item, XFS_LI_BUD,
233 : &xfs_bud_item_ops);
234 105928196 : budp->bud_buip = buip;
235 105928196 : budp->bud_format.bud_bui_id = buip->bui_format.bui_id;
236 :
237 105928196 : xfs_trans_add_item(tp, &budp->bud_item);
238 105928264 : 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 105887220 : 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 105887220 : int error;
253 :
254 105887220 : 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 105887339 : tp->t_flags |= XFS_TRANS_DIRTY | XFS_TRANS_HAS_INTENT_DONE;
264 105887339 : set_bit(XFS_LI_DIRTY, &budp->bud_item.li_flags);
265 :
266 105887493 : 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 : /* Set the map extent flags for this mapping. */
285 : static void
286 105886515 : xfs_trans_set_bmap_flags(
287 : struct xfs_map_extent *map,
288 : enum xfs_bmap_intent_type type,
289 : int whichfork,
290 : xfs_exntst_t state)
291 : {
292 105886515 : map->me_flags = 0;
293 105886515 : switch (type) {
294 105886515 : case XFS_BMAP_MAP:
295 : case XFS_BMAP_UNMAP:
296 105886515 : map->me_flags = type;
297 105886515 : break;
298 0 : default:
299 0 : ASSERT(0);
300 : }
301 105886515 : if (state == XFS_EXT_UNWRITTEN)
302 7874853 : map->me_flags |= XFS_BMAP_EXTENT_UNWRITTEN;
303 105886515 : if (whichfork == XFS_ATTR_FORK)
304 0 : map->me_flags |= XFS_BMAP_EXTENT_ATTR_FORK;
305 105886515 : }
306 :
307 : /* Log bmap updates in the intent item. */
308 : STATIC void
309 105886619 : xfs_bmap_update_log_item(
310 : struct xfs_trans *tp,
311 : struct xfs_bui_log_item *buip,
312 : struct xfs_bmap_intent *bi)
313 : {
314 105886619 : uint next_extent;
315 105886619 : struct xfs_map_extent *map;
316 :
317 105886619 : tp->t_flags |= XFS_TRANS_DIRTY;
318 105886619 : set_bit(XFS_LI_DIRTY, &buip->bui_item.li_flags);
319 :
320 : /*
321 : * atomic_inc_return gives us the value after the increment;
322 : * we want to use it as an array index so we need to subtract 1 from
323 : * it.
324 : */
325 105887275 : next_extent = atomic_inc_return(&buip->bui_next_extent) - 1;
326 105886524 : ASSERT(next_extent < buip->bui_format.bui_nextents);
327 105886524 : map = &buip->bui_format.bui_extents[next_extent];
328 105886524 : map->me_owner = bi->bi_owner->i_ino;
329 105886524 : map->me_startblock = bi->bi_bmap.br_startblock;
330 105886524 : map->me_startoff = bi->bi_bmap.br_startoff;
331 105886524 : map->me_len = bi->bi_bmap.br_blockcount;
332 105886524 : xfs_trans_set_bmap_flags(map, bi->bi_type, bi->bi_whichfork,
333 : bi->bi_bmap.br_state);
334 105886607 : }
335 :
336 : static struct xfs_log_item *
337 105886203 : xfs_bmap_update_create_intent(
338 : struct xfs_trans *tp,
339 : struct list_head *items,
340 : unsigned int count,
341 : bool sort)
342 : {
343 105886203 : struct xfs_mount *mp = tp->t_mountp;
344 105886203 : struct xfs_bui_log_item *buip = xfs_bui_init(mp);
345 105886693 : struct xfs_bmap_intent *bi;
346 :
347 105886693 : ASSERT(count == XFS_BUI_MAX_FAST_EXTENTS);
348 :
349 105886693 : xfs_trans_add_item(tp, &buip->bui_item);
350 105886729 : if (sort)
351 105886716 : list_sort(mp, items, xfs_bmap_update_diff_items);
352 211773309 : list_for_each_entry(bi, items, bi_list)
353 105886679 : xfs_bmap_update_log_item(tp, buip, bi);
354 105886630 : return &buip->bui_item;
355 : }
356 :
357 : /* Get an BUD so we can process all the deferred rmap updates. */
358 : static struct xfs_log_item *
359 105886714 : xfs_bmap_update_create_done(
360 : struct xfs_trans *tp,
361 : struct xfs_log_item *intent,
362 : unsigned int count)
363 : {
364 105886714 : return &xfs_trans_get_bud(tp, BUI_ITEM(intent))->bud_item;
365 : }
366 :
367 : /* Take a passive ref to the AG containing the space we're mapping. */
368 : void
369 105887492 : xfs_bmap_update_get_group(
370 : struct xfs_mount *mp,
371 : struct xfs_bmap_intent *bi)
372 : {
373 105887492 : xfs_agnumber_t agno;
374 :
375 105887492 : agno = XFS_FSB_TO_AGNO(mp, bi->bi_bmap.br_startblock);
376 :
377 : /*
378 : * Bump the intent count on behalf of the deferred rmap and refcount
379 : * intent items that that we can queue when we finish this bmap work.
380 : * This new intent item will bump the intent count before the bmap
381 : * intent drops the intent count, ensuring that the intent count
382 : * remains nonzero across the transaction roll.
383 : */
384 105887492 : bi->bi_pag = xfs_perag_intent_get(mp, agno);
385 105887681 : }
386 :
387 : /* Release a passive AG ref after finishing mapping work. */
388 : static inline void
389 : xfs_bmap_update_put_group(
390 : struct xfs_bmap_intent *bi)
391 : {
392 105887796 : xfs_perag_intent_put(bi->bi_pag);
393 : }
394 :
395 : /* Process a deferred rmap update. */
396 : STATIC int
397 105886798 : xfs_bmap_update_finish_item(
398 : struct xfs_trans *tp,
399 : struct xfs_log_item *done,
400 : struct list_head *item,
401 : struct xfs_btree_cur **state)
402 : {
403 105886798 : struct xfs_bmap_intent *bi;
404 105886798 : int error;
405 :
406 105886798 : bi = container_of(item, struct xfs_bmap_intent, bi_list);
407 :
408 105886798 : error = xfs_trans_log_finish_bmap_update(tp, BUD_ITEM(done), bi);
409 105887072 : if (!error && bi->bi_bmap.br_blockcount > 0) {
410 0 : ASSERT(bi->bi_type == XFS_BMAP_UNMAP);
411 0 : return -EAGAIN;
412 : }
413 :
414 105887072 : xfs_bmap_update_put_group(bi);
415 105886921 : kmem_cache_free(xfs_bmap_intent_cache, bi);
416 105886921 : return error;
417 : }
418 :
419 : /* Abort all pending BUIs. */
420 : STATIC void
421 311 : xfs_bmap_update_abort_intent(
422 : struct xfs_log_item *intent)
423 : {
424 311 : xfs_bui_release(BUI_ITEM(intent));
425 311 : }
426 :
427 : /* Cancel a deferred bmap update. */
428 : STATIC void
429 311 : xfs_bmap_update_cancel_item(
430 : struct list_head *item)
431 : {
432 311 : struct xfs_bmap_intent *bi;
433 :
434 311 : bi = container_of(item, struct xfs_bmap_intent, bi_list);
435 :
436 311 : xfs_bmap_update_put_group(bi);
437 311 : kmem_cache_free(xfs_bmap_intent_cache, bi);
438 311 : }
439 :
440 : const struct xfs_defer_op_type xfs_bmap_update_defer_type = {
441 : .max_items = XFS_BUI_MAX_FAST_EXTENTS,
442 : .create_intent = xfs_bmap_update_create_intent,
443 : .abort_intent = xfs_bmap_update_abort_intent,
444 : .create_done = xfs_bmap_update_create_done,
445 : .finish_item = xfs_bmap_update_finish_item,
446 : .cancel_item = xfs_bmap_update_cancel_item,
447 : };
448 :
449 : /* Is this recovered BUI ok? */
450 : static inline bool
451 413 : xfs_bui_validate(
452 : struct xfs_mount *mp,
453 : struct xfs_bui_log_item *buip)
454 : {
455 413 : struct xfs_map_extent *map;
456 :
457 : /* Only one mapping operation per BUI... */
458 413 : if (buip->bui_format.bui_nextents != XFS_BUI_MAX_FAST_EXTENTS)
459 : return false;
460 :
461 413 : map = &buip->bui_format.bui_extents[0];
462 :
463 413 : if (map->me_flags & ~XFS_BMAP_EXTENT_FLAGS)
464 : return false;
465 :
466 413 : switch (map->me_flags & XFS_BMAP_EXTENT_TYPE_MASK) {
467 : case XFS_BMAP_MAP:
468 : case XFS_BMAP_UNMAP:
469 413 : break;
470 : default:
471 : return false;
472 : }
473 :
474 413 : if (!xfs_verify_ino(mp, map->me_owner))
475 : return false;
476 :
477 413 : if (!xfs_verify_fileext(mp, map->me_startoff, map->me_len))
478 : return false;
479 :
480 413 : return xfs_verify_fsbext(mp, map->me_startblock, map->me_len);
481 : }
482 :
483 : /*
484 : * Process a bmap update intent item that was recovered from the log.
485 : * We need to update some inode's bmbt.
486 : */
487 : STATIC int
488 413 : xfs_bui_item_recover(
489 : struct xfs_log_item *lip,
490 : struct list_head *capture_list)
491 : {
492 413 : struct xfs_bmap_intent fake = { };
493 413 : struct xfs_bui_log_item *buip = BUI_ITEM(lip);
494 413 : struct xfs_trans *tp;
495 413 : struct xfs_inode *ip = NULL;
496 413 : struct xfs_mount *mp = lip->li_log->l_mp;
497 413 : struct xfs_map_extent *map;
498 413 : struct xfs_bud_log_item *budp;
499 413 : int iext_delta;
500 413 : int error = 0;
501 :
502 413 : if (!xfs_bui_validate(mp, buip)) {
503 0 : XFS_CORRUPTION_ERROR(__func__, XFS_ERRLEVEL_LOW, mp,
504 : &buip->bui_format, sizeof(buip->bui_format));
505 0 : return -EFSCORRUPTED;
506 : }
507 :
508 413 : map = &buip->bui_format.bui_extents[0];
509 413 : fake.bi_whichfork = (map->me_flags & XFS_BMAP_EXTENT_ATTR_FORK) ?
510 413 : XFS_ATTR_FORK : XFS_DATA_FORK;
511 413 : fake.bi_type = map->me_flags & XFS_BMAP_EXTENT_TYPE_MASK;
512 :
513 413 : error = xlog_recover_iget(mp, map->me_owner, &ip);
514 413 : if (error)
515 : return error;
516 :
517 : /* Allocate transaction and do the work. */
518 413 : error = xfs_trans_alloc(mp, &M_RES(mp)->tr_itruncate,
519 413 : XFS_EXTENTADD_SPACE_RES(mp, XFS_DATA_FORK), 0, 0, &tp);
520 413 : if (error)
521 0 : goto err_rele;
522 :
523 413 : budp = xfs_trans_get_bud(tp, buip);
524 413 : xfs_ilock(ip, XFS_ILOCK_EXCL);
525 413 : xfs_trans_ijoin(tp, ip, 0);
526 :
527 413 : if (fake.bi_type == XFS_BMAP_MAP)
528 : iext_delta = XFS_IEXT_ADD_NOSPLIT_CNT;
529 : else
530 : iext_delta = XFS_IEXT_PUNCH_HOLE_CNT;
531 :
532 413 : error = xfs_iext_count_may_overflow(ip, fake.bi_whichfork, iext_delta);
533 413 : if (error == -EFBIG)
534 0 : error = xfs_iext_count_upgrade(tp, ip, iext_delta);
535 413 : if (error)
536 0 : goto err_cancel;
537 :
538 413 : fake.bi_owner = ip;
539 413 : fake.bi_bmap.br_startblock = map->me_startblock;
540 413 : fake.bi_bmap.br_startoff = map->me_startoff;
541 413 : fake.bi_bmap.br_blockcount = map->me_len;
542 413 : fake.bi_bmap.br_state = (map->me_flags & XFS_BMAP_EXTENT_UNWRITTEN) ?
543 413 : XFS_EXT_UNWRITTEN : XFS_EXT_NORM;
544 :
545 413 : xfs_bmap_update_get_group(mp, &fake);
546 413 : error = xfs_trans_log_finish_bmap_update(tp, budp, &fake);
547 413 : if (error == -EFSCORRUPTED)
548 0 : XFS_CORRUPTION_ERROR(__func__, XFS_ERRLEVEL_LOW, mp, map,
549 : sizeof(*map));
550 413 : xfs_bmap_update_put_group(&fake);
551 413 : if (error)
552 0 : goto err_cancel;
553 :
554 413 : if (fake.bi_bmap.br_blockcount > 0) {
555 0 : ASSERT(fake.bi_type == XFS_BMAP_UNMAP);
556 0 : xfs_bmap_unmap_extent(tp, ip, &fake.bi_bmap);
557 : }
558 :
559 : /*
560 : * Commit transaction, which frees the transaction and saves the inode
561 : * for later replay activities.
562 : */
563 413 : error = xfs_defer_ops_capture_and_commit(tp, capture_list);
564 413 : if (error)
565 0 : goto err_unlock;
566 :
567 413 : xfs_iunlock(ip, XFS_ILOCK_EXCL);
568 413 : xfs_irele(ip);
569 413 : return 0;
570 :
571 0 : err_cancel:
572 0 : xfs_trans_cancel(tp);
573 0 : err_unlock:
574 0 : xfs_iunlock(ip, XFS_ILOCK_EXCL);
575 0 : err_rele:
576 0 : xfs_irele(ip);
577 0 : return error;
578 : }
579 :
580 : STATIC bool
581 2783 : xfs_bui_item_match(
582 : struct xfs_log_item *lip,
583 : uint64_t intent_id)
584 : {
585 2783 : return BUI_ITEM(lip)->bui_format.bui_id == intent_id;
586 : }
587 :
588 : /* Relog an intent item to push the log tail forward. */
589 : static struct xfs_log_item *
590 40928 : xfs_bui_item_relog(
591 : struct xfs_log_item *intent,
592 : struct xfs_trans *tp)
593 : {
594 40928 : struct xfs_bud_log_item *budp;
595 40928 : struct xfs_bui_log_item *buip;
596 40928 : struct xfs_map_extent *map;
597 40928 : unsigned int count;
598 :
599 40928 : count = BUI_ITEM(intent)->bui_format.bui_nextents;
600 40928 : map = BUI_ITEM(intent)->bui_format.bui_extents;
601 :
602 40928 : tp->t_flags |= XFS_TRANS_DIRTY;
603 40928 : budp = xfs_trans_get_bud(tp, BUI_ITEM(intent));
604 40928 : set_bit(XFS_LI_DIRTY, &budp->bud_item.li_flags);
605 :
606 40928 : buip = xfs_bui_init(tp->t_mountp);
607 81856 : memcpy(buip->bui_format.bui_extents, map, count * sizeof(*map));
608 40928 : atomic_set(&buip->bui_next_extent, count);
609 40928 : xfs_trans_add_item(tp, &buip->bui_item);
610 40928 : set_bit(XFS_LI_DIRTY, &buip->bui_item.li_flags);
611 40928 : return &buip->bui_item;
612 : }
613 :
614 : static const struct xfs_item_ops xfs_bui_item_ops = {
615 : .flags = XFS_ITEM_INTENT,
616 : .iop_size = xfs_bui_item_size,
617 : .iop_format = xfs_bui_item_format,
618 : .iop_unpin = xfs_bui_item_unpin,
619 : .iop_release = xfs_bui_item_release,
620 : .iop_recover = xfs_bui_item_recover,
621 : .iop_match = xfs_bui_item_match,
622 : .iop_relog = xfs_bui_item_relog,
623 : };
624 :
625 : static inline void
626 3187 : xfs_bui_copy_format(
627 : struct xfs_bui_log_format *dst,
628 : const struct xfs_bui_log_format *src)
629 : {
630 3187 : unsigned int i;
631 :
632 6374 : memcpy(dst, src, offsetof(struct xfs_bui_log_format, bui_extents));
633 :
634 6374 : for (i = 0; i < src->bui_nextents; i++)
635 6374 : memcpy(&dst->bui_extents[i], &src->bui_extents[i],
636 : sizeof(struct xfs_map_extent));
637 3187 : }
638 :
639 : /*
640 : * This routine is called to create an in-core extent bmap update
641 : * item from the bui format structure which was logged on disk.
642 : * It allocates an in-core bui, copies the extents from the format
643 : * structure into it, and adds the bui to the AIL with the given
644 : * LSN.
645 : */
646 : STATIC int
647 3187 : xlog_recover_bui_commit_pass2(
648 : struct xlog *log,
649 : struct list_head *buffer_list,
650 : struct xlog_recover_item *item,
651 : xfs_lsn_t lsn)
652 : {
653 3187 : struct xfs_mount *mp = log->l_mp;
654 3187 : struct xfs_bui_log_item *buip;
655 3187 : struct xfs_bui_log_format *bui_formatp;
656 3187 : size_t len;
657 :
658 3187 : bui_formatp = item->ri_buf[0].i_addr;
659 :
660 3187 : if (item->ri_buf[0].i_len < xfs_bui_log_format_sizeof(0)) {
661 0 : XFS_CORRUPTION_ERROR(__func__, XFS_ERRLEVEL_LOW, mp,
662 : item->ri_buf[0].i_addr, item->ri_buf[0].i_len);
663 0 : return -EFSCORRUPTED;
664 : }
665 :
666 3187 : if (bui_formatp->bui_nextents != XFS_BUI_MAX_FAST_EXTENTS) {
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 3187 : len = xfs_bui_log_format_sizeof(bui_formatp->bui_nextents);
673 3187 : if (item->ri_buf[0].i_len != len) {
674 0 : XFS_CORRUPTION_ERROR(__func__, XFS_ERRLEVEL_LOW, mp,
675 : item->ri_buf[0].i_addr, item->ri_buf[0].i_len);
676 0 : return -EFSCORRUPTED;
677 : }
678 :
679 3187 : buip = xfs_bui_init(mp);
680 3187 : xfs_bui_copy_format(&buip->bui_format, bui_formatp);
681 3187 : atomic_set(&buip->bui_next_extent, bui_formatp->bui_nextents);
682 : /*
683 : * Insert the intent into the AIL directly and drop one reference so
684 : * that finishing or canceling the work will drop the other.
685 : */
686 3187 : xfs_trans_ail_insert(log->l_ailp, &buip->bui_item, lsn);
687 3187 : xfs_bui_release(buip);
688 3187 : return 0;
689 : }
690 :
691 : const struct xlog_recover_item_ops xlog_bui_item_ops = {
692 : .item_type = XFS_LI_BUI,
693 : .commit_pass2 = xlog_recover_bui_commit_pass2,
694 : };
695 :
696 : /*
697 : * This routine is called when an BUD format structure is found in a committed
698 : * transaction in the log. Its purpose is to cancel the corresponding BUI if it
699 : * was still in the log. To do this it searches the AIL for the BUI with an id
700 : * equal to that in the BUD format structure. If we find it we drop the BUD
701 : * reference, which removes the BUI from the AIL and frees it.
702 : */
703 : STATIC int
704 2814 : xlog_recover_bud_commit_pass2(
705 : struct xlog *log,
706 : struct list_head *buffer_list,
707 : struct xlog_recover_item *item,
708 : xfs_lsn_t lsn)
709 : {
710 2814 : struct xfs_bud_log_format *bud_formatp;
711 :
712 2814 : bud_formatp = item->ri_buf[0].i_addr;
713 2814 : if (item->ri_buf[0].i_len != sizeof(struct xfs_bud_log_format)) {
714 0 : XFS_CORRUPTION_ERROR(__func__, XFS_ERRLEVEL_LOW, log->l_mp,
715 : item->ri_buf[0].i_addr, item->ri_buf[0].i_len);
716 0 : return -EFSCORRUPTED;
717 : }
718 :
719 2814 : xlog_recover_release_intent(log, XFS_LI_BUI, bud_formatp->bud_bui_id);
720 2814 : return 0;
721 : }
722 :
723 : const struct xlog_recover_item_ops xlog_bud_item_ops = {
724 : .item_type = XFS_LI_BUD,
725 : .commit_pass2 = xlog_recover_bud_commit_pass2,
726 : };
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