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5880f2d7 DW |
1 | /* |
2 | * Copyright (C) 2016 Oracle. All Rights Reserved. | |
3 | * | |
4 | * Author: Darrick J. Wong <darrick.wong@oracle.com> | |
5 | * | |
6 | * This program is free software; you can redistribute it and/or | |
7 | * modify it under the terms of the GNU General Public License | |
8 | * as published by the Free Software Foundation; either version 2 | |
9 | * of the License, or (at your option) any later version. | |
10 | * | |
11 | * This program is distributed in the hope that it would be useful, | |
12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | * GNU General Public License for more details. | |
15 | * | |
16 | * You should have received a copy of the GNU General Public License | |
17 | * along with this program; if not, write the Free Software Foundation, | |
18 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA. | |
19 | */ | |
20 | #include "xfs.h" | |
21 | #include "xfs_fs.h" | |
22 | #include "xfs_format.h" | |
23 | #include "xfs_log_format.h" | |
24 | #include "xfs_trans_resv.h" | |
9e88b5d8 | 25 | #include "xfs_bit.h" |
5880f2d7 | 26 | #include "xfs_mount.h" |
9c194644 | 27 | #include "xfs_defer.h" |
5880f2d7 DW |
28 | #include "xfs_trans.h" |
29 | #include "xfs_trans_priv.h" | |
30 | #include "xfs_buf_item.h" | |
31 | #include "xfs_rmap_item.h" | |
32 | #include "xfs_log.h" | |
9c194644 | 33 | #include "xfs_rmap.h" |
5880f2d7 DW |
34 | |
35 | ||
36 | kmem_zone_t *xfs_rui_zone; | |
37 | kmem_zone_t *xfs_rud_zone; | |
38 | ||
39 | static inline struct xfs_rui_log_item *RUI_ITEM(struct xfs_log_item *lip) | |
40 | { | |
41 | return container_of(lip, struct xfs_rui_log_item, rui_item); | |
42 | } | |
43 | ||
44 | void | |
45 | xfs_rui_item_free( | |
46 | struct xfs_rui_log_item *ruip) | |
47 | { | |
48 | if (ruip->rui_format.rui_nextents > XFS_RUI_MAX_FAST_EXTENTS) | |
49 | kmem_free(ruip); | |
50 | else | |
51 | kmem_zone_free(xfs_rui_zone, ruip); | |
52 | } | |
53 | ||
54 | /* | |
55 | * This returns the number of iovecs needed to log the given rui item. | |
56 | * We only need 1 iovec for an rui item. It just logs the rui_log_format | |
57 | * structure. | |
58 | */ | |
59 | static inline int | |
60 | xfs_rui_item_sizeof( | |
61 | struct xfs_rui_log_item *ruip) | |
62 | { | |
63 | return sizeof(struct xfs_rui_log_format) + | |
64 | (ruip->rui_format.rui_nextents - 1) * | |
65 | sizeof(struct xfs_map_extent); | |
66 | } | |
67 | ||
68 | STATIC void | |
69 | xfs_rui_item_size( | |
70 | struct xfs_log_item *lip, | |
71 | int *nvecs, | |
72 | int *nbytes) | |
73 | { | |
74 | *nvecs += 1; | |
75 | *nbytes += xfs_rui_item_sizeof(RUI_ITEM(lip)); | |
76 | } | |
77 | ||
78 | /* | |
79 | * This is called to fill in the vector of log iovecs for the | |
80 | * given rui log item. We use only 1 iovec, and we point that | |
81 | * at the rui_log_format structure embedded in the rui item. | |
82 | * It is at this point that we assert that all of the extent | |
83 | * slots in the rui item have been filled. | |
84 | */ | |
85 | STATIC void | |
86 | xfs_rui_item_format( | |
87 | struct xfs_log_item *lip, | |
88 | struct xfs_log_vec *lv) | |
89 | { | |
90 | struct xfs_rui_log_item *ruip = RUI_ITEM(lip); | |
91 | struct xfs_log_iovec *vecp = NULL; | |
92 | ||
93 | ASSERT(atomic_read(&ruip->rui_next_extent) == | |
94 | ruip->rui_format.rui_nextents); | |
95 | ||
96 | ruip->rui_format.rui_type = XFS_LI_RUI; | |
97 | ruip->rui_format.rui_size = 1; | |
98 | ||
99 | xlog_copy_iovec(lv, &vecp, XLOG_REG_TYPE_RUI_FORMAT, &ruip->rui_format, | |
100 | xfs_rui_item_sizeof(ruip)); | |
101 | } | |
102 | ||
103 | /* | |
104 | * Pinning has no meaning for an rui item, so just return. | |
105 | */ | |
106 | STATIC void | |
107 | xfs_rui_item_pin( | |
108 | struct xfs_log_item *lip) | |
109 | { | |
110 | } | |
111 | ||
112 | /* | |
113 | * The unpin operation is the last place an RUI is manipulated in the log. It is | |
114 | * either inserted in the AIL or aborted in the event of a log I/O error. In | |
115 | * either case, the RUI transaction has been successfully committed to make it | |
116 | * this far. Therefore, we expect whoever committed the RUI to either construct | |
117 | * and commit the RUD or drop the RUD's reference in the event of error. Simply | |
118 | * drop the log's RUI reference now that the log is done with it. | |
119 | */ | |
120 | STATIC void | |
121 | xfs_rui_item_unpin( | |
122 | struct xfs_log_item *lip, | |
123 | int remove) | |
124 | { | |
125 | struct xfs_rui_log_item *ruip = RUI_ITEM(lip); | |
126 | ||
127 | xfs_rui_release(ruip); | |
128 | } | |
129 | ||
130 | /* | |
131 | * RUI items have no locking or pushing. However, since RUIs are pulled from | |
132 | * the AIL when their corresponding RUDs are committed to disk, their situation | |
133 | * is very similar to being pinned. Return XFS_ITEM_PINNED so that the caller | |
134 | * will eventually flush the log. This should help in getting the RUI out of | |
135 | * the AIL. | |
136 | */ | |
137 | STATIC uint | |
138 | xfs_rui_item_push( | |
139 | struct xfs_log_item *lip, | |
140 | struct list_head *buffer_list) | |
141 | { | |
142 | return XFS_ITEM_PINNED; | |
143 | } | |
144 | ||
145 | /* | |
146 | * The RUI has been either committed or aborted if the transaction has been | |
147 | * cancelled. If the transaction was cancelled, an RUD isn't going to be | |
148 | * constructed and thus we free the RUI here directly. | |
149 | */ | |
150 | STATIC void | |
151 | xfs_rui_item_unlock( | |
152 | struct xfs_log_item *lip) | |
153 | { | |
154 | if (lip->li_flags & XFS_LI_ABORTED) | |
155 | xfs_rui_item_free(RUI_ITEM(lip)); | |
156 | } | |
157 | ||
158 | /* | |
159 | * The RUI is logged only once and cannot be moved in the log, so simply return | |
160 | * the lsn at which it's been logged. | |
161 | */ | |
162 | STATIC xfs_lsn_t | |
163 | xfs_rui_item_committed( | |
164 | struct xfs_log_item *lip, | |
165 | xfs_lsn_t lsn) | |
166 | { | |
167 | return lsn; | |
168 | } | |
169 | ||
170 | /* | |
171 | * The RUI dependency tracking op doesn't do squat. It can't because | |
172 | * it doesn't know where the free extent is coming from. The dependency | |
173 | * tracking has to be handled by the "enclosing" metadata object. For | |
174 | * example, for inodes, the inode is locked throughout the extent freeing | |
175 | * so the dependency should be recorded there. | |
176 | */ | |
177 | STATIC void | |
178 | xfs_rui_item_committing( | |
179 | struct xfs_log_item *lip, | |
180 | xfs_lsn_t lsn) | |
181 | { | |
182 | } | |
183 | ||
184 | /* | |
185 | * This is the ops vector shared by all rui log items. | |
186 | */ | |
187 | static const struct xfs_item_ops xfs_rui_item_ops = { | |
188 | .iop_size = xfs_rui_item_size, | |
189 | .iop_format = xfs_rui_item_format, | |
190 | .iop_pin = xfs_rui_item_pin, | |
191 | .iop_unpin = xfs_rui_item_unpin, | |
192 | .iop_unlock = xfs_rui_item_unlock, | |
193 | .iop_committed = xfs_rui_item_committed, | |
194 | .iop_push = xfs_rui_item_push, | |
195 | .iop_committing = xfs_rui_item_committing, | |
196 | }; | |
197 | ||
198 | /* | |
199 | * Allocate and initialize an rui item with the given number of extents. | |
200 | */ | |
201 | struct xfs_rui_log_item * | |
202 | xfs_rui_init( | |
203 | struct xfs_mount *mp, | |
204 | uint nextents) | |
205 | ||
206 | { | |
207 | struct xfs_rui_log_item *ruip; | |
208 | uint size; | |
209 | ||
210 | ASSERT(nextents > 0); | |
211 | if (nextents > XFS_RUI_MAX_FAST_EXTENTS) { | |
212 | size = (uint)(sizeof(struct xfs_rui_log_item) + | |
213 | ((nextents - 1) * sizeof(struct xfs_map_extent))); | |
214 | ruip = kmem_zalloc(size, KM_SLEEP); | |
215 | } else { | |
216 | ruip = kmem_zone_zalloc(xfs_rui_zone, KM_SLEEP); | |
217 | } | |
218 | ||
219 | xfs_log_item_init(mp, &ruip->rui_item, XFS_LI_RUI, &xfs_rui_item_ops); | |
220 | ruip->rui_format.rui_nextents = nextents; | |
221 | ruip->rui_format.rui_id = (uintptr_t)(void *)ruip; | |
222 | atomic_set(&ruip->rui_next_extent, 0); | |
223 | atomic_set(&ruip->rui_refcount, 2); | |
224 | ||
225 | return ruip; | |
226 | } | |
227 | ||
228 | /* | |
229 | * Copy an RUI format buffer from the given buf, and into the destination | |
230 | * RUI format structure. The RUI/RUD items were designed not to need any | |
231 | * special alignment handling. | |
232 | */ | |
233 | int | |
234 | xfs_rui_copy_format( | |
235 | struct xfs_log_iovec *buf, | |
236 | struct xfs_rui_log_format *dst_rui_fmt) | |
237 | { | |
238 | struct xfs_rui_log_format *src_rui_fmt; | |
239 | uint len; | |
240 | ||
241 | src_rui_fmt = buf->i_addr; | |
242 | len = sizeof(struct xfs_rui_log_format) + | |
243 | (src_rui_fmt->rui_nextents - 1) * | |
244 | sizeof(struct xfs_map_extent); | |
245 | ||
246 | if (buf->i_len != len) | |
247 | return -EFSCORRUPTED; | |
248 | ||
249 | memcpy((char *)dst_rui_fmt, (char *)src_rui_fmt, len); | |
250 | return 0; | |
251 | } | |
252 | ||
253 | /* | |
254 | * Freeing the RUI requires that we remove it from the AIL if it has already | |
255 | * been placed there. However, the RUI may not yet have been placed in the AIL | |
256 | * when called by xfs_rui_release() from RUD processing due to the ordering of | |
257 | * committed vs unpin operations in bulk insert operations. Hence the reference | |
258 | * count to ensure only the last caller frees the RUI. | |
259 | */ | |
260 | void | |
261 | xfs_rui_release( | |
262 | struct xfs_rui_log_item *ruip) | |
263 | { | |
264 | if (atomic_dec_and_test(&ruip->rui_refcount)) { | |
265 | xfs_trans_ail_remove(&ruip->rui_item, SHUTDOWN_LOG_IO_ERROR); | |
266 | xfs_rui_item_free(ruip); | |
267 | } | |
268 | } | |
269 | ||
270 | static inline struct xfs_rud_log_item *RUD_ITEM(struct xfs_log_item *lip) | |
271 | { | |
272 | return container_of(lip, struct xfs_rud_log_item, rud_item); | |
273 | } | |
274 | ||
5880f2d7 DW |
275 | STATIC void |
276 | xfs_rud_item_size( | |
277 | struct xfs_log_item *lip, | |
278 | int *nvecs, | |
279 | int *nbytes) | |
280 | { | |
281 | *nvecs += 1; | |
722e2517 | 282 | *nbytes += sizeof(struct xfs_rud_log_format); |
5880f2d7 DW |
283 | } |
284 | ||
285 | /* | |
286 | * This is called to fill in the vector of log iovecs for the | |
287 | * given rud log item. We use only 1 iovec, and we point that | |
288 | * at the rud_log_format structure embedded in the rud item. | |
289 | * It is at this point that we assert that all of the extent | |
290 | * slots in the rud item have been filled. | |
291 | */ | |
292 | STATIC void | |
293 | xfs_rud_item_format( | |
294 | struct xfs_log_item *lip, | |
295 | struct xfs_log_vec *lv) | |
296 | { | |
297 | struct xfs_rud_log_item *rudp = RUD_ITEM(lip); | |
298 | struct xfs_log_iovec *vecp = NULL; | |
299 | ||
5880f2d7 DW |
300 | rudp->rud_format.rud_type = XFS_LI_RUD; |
301 | rudp->rud_format.rud_size = 1; | |
302 | ||
303 | xlog_copy_iovec(lv, &vecp, XLOG_REG_TYPE_RUD_FORMAT, &rudp->rud_format, | |
722e2517 | 304 | sizeof(struct xfs_rud_log_format)); |
5880f2d7 DW |
305 | } |
306 | ||
307 | /* | |
308 | * Pinning has no meaning for an rud item, so just return. | |
309 | */ | |
310 | STATIC void | |
311 | xfs_rud_item_pin( | |
312 | struct xfs_log_item *lip) | |
313 | { | |
314 | } | |
315 | ||
316 | /* | |
317 | * Since pinning has no meaning for an rud item, unpinning does | |
318 | * not either. | |
319 | */ | |
320 | STATIC void | |
321 | xfs_rud_item_unpin( | |
322 | struct xfs_log_item *lip, | |
323 | int remove) | |
324 | { | |
325 | } | |
326 | ||
327 | /* | |
328 | * There isn't much you can do to push on an rud item. It is simply stuck | |
329 | * waiting for the log to be flushed to disk. | |
330 | */ | |
331 | STATIC uint | |
332 | xfs_rud_item_push( | |
333 | struct xfs_log_item *lip, | |
334 | struct list_head *buffer_list) | |
335 | { | |
336 | return XFS_ITEM_PINNED; | |
337 | } | |
338 | ||
339 | /* | |
340 | * The RUD is either committed or aborted if the transaction is cancelled. If | |
341 | * the transaction is cancelled, drop our reference to the RUI and free the | |
342 | * RUD. | |
343 | */ | |
344 | STATIC void | |
345 | xfs_rud_item_unlock( | |
346 | struct xfs_log_item *lip) | |
347 | { | |
348 | struct xfs_rud_log_item *rudp = RUD_ITEM(lip); | |
349 | ||
350 | if (lip->li_flags & XFS_LI_ABORTED) { | |
351 | xfs_rui_release(rudp->rud_ruip); | |
722e2517 | 352 | kmem_zone_free(xfs_rud_zone, rudp); |
5880f2d7 DW |
353 | } |
354 | } | |
355 | ||
356 | /* | |
357 | * When the rud item is committed to disk, all we need to do is delete our | |
358 | * reference to our partner rui item and then free ourselves. Since we're | |
359 | * freeing ourselves we must return -1 to keep the transaction code from | |
360 | * further referencing this item. | |
361 | */ | |
362 | STATIC xfs_lsn_t | |
363 | xfs_rud_item_committed( | |
364 | struct xfs_log_item *lip, | |
365 | xfs_lsn_t lsn) | |
366 | { | |
367 | struct xfs_rud_log_item *rudp = RUD_ITEM(lip); | |
368 | ||
369 | /* | |
370 | * Drop the RUI reference regardless of whether the RUD has been | |
371 | * aborted. Once the RUD transaction is constructed, it is the sole | |
372 | * responsibility of the RUD to release the RUI (even if the RUI is | |
373 | * aborted due to log I/O error). | |
374 | */ | |
375 | xfs_rui_release(rudp->rud_ruip); | |
722e2517 | 376 | kmem_zone_free(xfs_rud_zone, rudp); |
5880f2d7 DW |
377 | |
378 | return (xfs_lsn_t)-1; | |
379 | } | |
380 | ||
381 | /* | |
382 | * The RUD dependency tracking op doesn't do squat. It can't because | |
383 | * it doesn't know where the free extent is coming from. The dependency | |
384 | * tracking has to be handled by the "enclosing" metadata object. For | |
385 | * example, for inodes, the inode is locked throughout the extent freeing | |
386 | * so the dependency should be recorded there. | |
387 | */ | |
388 | STATIC void | |
389 | xfs_rud_item_committing( | |
390 | struct xfs_log_item *lip, | |
391 | xfs_lsn_t lsn) | |
392 | { | |
393 | } | |
394 | ||
395 | /* | |
396 | * This is the ops vector shared by all rud log items. | |
397 | */ | |
398 | static const struct xfs_item_ops xfs_rud_item_ops = { | |
399 | .iop_size = xfs_rud_item_size, | |
400 | .iop_format = xfs_rud_item_format, | |
401 | .iop_pin = xfs_rud_item_pin, | |
402 | .iop_unpin = xfs_rud_item_unpin, | |
403 | .iop_unlock = xfs_rud_item_unlock, | |
404 | .iop_committed = xfs_rud_item_committed, | |
405 | .iop_push = xfs_rud_item_push, | |
406 | .iop_committing = xfs_rud_item_committing, | |
407 | }; | |
408 | ||
409 | /* | |
410 | * Allocate and initialize an rud item with the given number of extents. | |
411 | */ | |
412 | struct xfs_rud_log_item * | |
413 | xfs_rud_init( | |
414 | struct xfs_mount *mp, | |
722e2517 | 415 | struct xfs_rui_log_item *ruip) |
5880f2d7 DW |
416 | |
417 | { | |
418 | struct xfs_rud_log_item *rudp; | |
5880f2d7 | 419 | |
722e2517 | 420 | rudp = kmem_zone_zalloc(xfs_rud_zone, KM_SLEEP); |
5880f2d7 DW |
421 | xfs_log_item_init(mp, &rudp->rud_item, XFS_LI_RUD, &xfs_rud_item_ops); |
422 | rudp->rud_ruip = ruip; | |
5880f2d7 DW |
423 | rudp->rud_format.rud_rui_id = ruip->rui_format.rui_id; |
424 | ||
425 | return rudp; | |
426 | } | |
9e88b5d8 DW |
427 | |
428 | /* | |
429 | * Process an rmap update intent item that was recovered from the log. | |
430 | * We need to update the rmapbt. | |
431 | */ | |
432 | int | |
433 | xfs_rui_recover( | |
434 | struct xfs_mount *mp, | |
435 | struct xfs_rui_log_item *ruip) | |
436 | { | |
437 | int i; | |
438 | int error = 0; | |
439 | struct xfs_map_extent *rmap; | |
440 | xfs_fsblock_t startblock_fsb; | |
441 | bool op_ok; | |
9c194644 DW |
442 | struct xfs_rud_log_item *rudp; |
443 | enum xfs_rmap_intent_type type; | |
444 | int whichfork; | |
445 | xfs_exntst_t state; | |
446 | struct xfs_trans *tp; | |
447 | struct xfs_btree_cur *rcur = NULL; | |
9e88b5d8 DW |
448 | |
449 | ASSERT(!test_bit(XFS_RUI_RECOVERED, &ruip->rui_flags)); | |
450 | ||
451 | /* | |
452 | * First check the validity of the extents described by the | |
453 | * RUI. If any are bad, then assume that all are bad and | |
454 | * just toss the RUI. | |
455 | */ | |
456 | for (i = 0; i < ruip->rui_format.rui_nextents; i++) { | |
e127fafd | 457 | rmap = &ruip->rui_format.rui_extents[i]; |
9e88b5d8 DW |
458 | startblock_fsb = XFS_BB_TO_FSB(mp, |
459 | XFS_FSB_TO_DADDR(mp, rmap->me_startblock)); | |
460 | switch (rmap->me_flags & XFS_RMAP_EXTENT_TYPE_MASK) { | |
461 | case XFS_RMAP_EXTENT_MAP: | |
462 | case XFS_RMAP_EXTENT_UNMAP: | |
463 | case XFS_RMAP_EXTENT_CONVERT: | |
464 | case XFS_RMAP_EXTENT_ALLOC: | |
465 | case XFS_RMAP_EXTENT_FREE: | |
466 | op_ok = true; | |
467 | break; | |
468 | default: | |
469 | op_ok = false; | |
470 | break; | |
471 | } | |
e127fafd DW |
472 | if (!op_ok || startblock_fsb == 0 || |
473 | rmap->me_len == 0 || | |
474 | startblock_fsb >= mp->m_sb.sb_dblocks || | |
475 | rmap->me_len >= mp->m_sb.sb_agblocks || | |
9e88b5d8 DW |
476 | (rmap->me_flags & ~XFS_RMAP_EXTENT_FLAGS)) { |
477 | /* | |
478 | * This will pull the RUI from the AIL and | |
479 | * free the memory associated with it. | |
480 | */ | |
481 | set_bit(XFS_RUI_RECOVERED, &ruip->rui_flags); | |
482 | xfs_rui_release(ruip); | |
483 | return -EIO; | |
484 | } | |
485 | } | |
486 | ||
9c194644 DW |
487 | error = xfs_trans_alloc(mp, &M_RES(mp)->tr_itruncate, 0, 0, 0, &tp); |
488 | if (error) | |
489 | return error; | |
722e2517 | 490 | rudp = xfs_trans_get_rud(tp, ruip); |
9c194644 DW |
491 | |
492 | for (i = 0; i < ruip->rui_format.rui_nextents; i++) { | |
e127fafd | 493 | rmap = &ruip->rui_format.rui_extents[i]; |
9c194644 DW |
494 | state = (rmap->me_flags & XFS_RMAP_EXTENT_UNWRITTEN) ? |
495 | XFS_EXT_UNWRITTEN : XFS_EXT_NORM; | |
496 | whichfork = (rmap->me_flags & XFS_RMAP_EXTENT_ATTR_FORK) ? | |
497 | XFS_ATTR_FORK : XFS_DATA_FORK; | |
498 | switch (rmap->me_flags & XFS_RMAP_EXTENT_TYPE_MASK) { | |
499 | case XFS_RMAP_EXTENT_MAP: | |
500 | type = XFS_RMAP_MAP; | |
501 | break; | |
502 | case XFS_RMAP_EXTENT_UNMAP: | |
503 | type = XFS_RMAP_UNMAP; | |
504 | break; | |
505 | case XFS_RMAP_EXTENT_CONVERT: | |
506 | type = XFS_RMAP_CONVERT; | |
507 | break; | |
508 | case XFS_RMAP_EXTENT_ALLOC: | |
509 | type = XFS_RMAP_ALLOC; | |
510 | break; | |
511 | case XFS_RMAP_EXTENT_FREE: | |
512 | type = XFS_RMAP_FREE; | |
513 | break; | |
514 | default: | |
515 | error = -EFSCORRUPTED; | |
516 | goto abort_error; | |
517 | } | |
518 | error = xfs_trans_log_finish_rmap_update(tp, rudp, type, | |
519 | rmap->me_owner, whichfork, | |
520 | rmap->me_startoff, rmap->me_startblock, | |
521 | rmap->me_len, state, &rcur); | |
522 | if (error) | |
523 | goto abort_error; | |
524 | ||
525 | } | |
526 | ||
527 | xfs_rmap_finish_one_cleanup(tp, rcur, error); | |
9e88b5d8 | 528 | set_bit(XFS_RUI_RECOVERED, &ruip->rui_flags); |
9c194644 DW |
529 | error = xfs_trans_commit(tp); |
530 | return error; | |
531 | ||
532 | abort_error: | |
533 | xfs_rmap_finish_one_cleanup(tp, rcur, error); | |
534 | xfs_trans_cancel(tp); | |
9e88b5d8 DW |
535 | return error; |
536 | } |