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1da177e4 LT |
1 | /* |
2 | * Copyright (c) 2000-2001 Silicon Graphics, Inc. All Rights Reserved. | |
3 | * | |
4 | * This program is free software; you can redistribute it and/or modify it | |
5 | * under the terms of version 2 of the GNU General Public License as | |
6 | * published by the Free Software Foundation. | |
7 | * | |
8 | * This program is distributed in the hope that it would be useful, but | |
9 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
10 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. | |
11 | * | |
12 | * Further, this software is distributed without any warranty that it is | |
13 | * free of the rightful claim of any third person regarding infringement | |
14 | * or the like. Any license provided herein, whether implied or | |
15 | * otherwise, applies only to this software file. Patent licenses, if | |
16 | * any, provided herein do not apply to combinations of this program with | |
17 | * other software, or any other product whatsoever. | |
18 | * | |
19 | * You should have received a copy of the GNU General Public License along | |
20 | * with this program; if not, write the Free Software Foundation, Inc., 59 | |
21 | * Temple Place - Suite 330, Boston MA 02111-1307, USA. | |
22 | * | |
23 | * Contact information: Silicon Graphics, Inc., 1600 Amphitheatre Pkwy, | |
24 | * Mountain View, CA 94043, or: | |
25 | * | |
26 | * http://www.sgi.com | |
27 | * | |
28 | * For further information regarding this notice, see: | |
29 | * | |
30 | * http://oss.sgi.com/projects/GenInfo/SGIGPLNoticeExplan/ | |
31 | */ | |
32 | ||
33 | /* | |
34 | * This file contains the implementation of the xfs_efi_log_item | |
35 | * and xfs_efd_log_item items. | |
36 | */ | |
37 | ||
38 | #include "xfs.h" | |
39 | ||
40 | #include "xfs_macros.h" | |
41 | #include "xfs_types.h" | |
42 | #include "xfs_inum.h" | |
43 | #include "xfs_log.h" | |
44 | #include "xfs_trans.h" | |
45 | #include "xfs_buf_item.h" | |
46 | #include "xfs_sb.h" | |
47 | #include "xfs_dir.h" | |
48 | #include "xfs_dmapi.h" | |
49 | #include "xfs_mount.h" | |
50 | #include "xfs_trans_priv.h" | |
51 | #include "xfs_extfree_item.h" | |
52 | ||
53 | ||
54 | kmem_zone_t *xfs_efi_zone; | |
55 | kmem_zone_t *xfs_efd_zone; | |
56 | ||
57 | STATIC void xfs_efi_item_unlock(xfs_efi_log_item_t *); | |
58 | STATIC void xfs_efi_item_abort(xfs_efi_log_item_t *); | |
59 | STATIC void xfs_efd_item_abort(xfs_efd_log_item_t *); | |
60 | ||
61 | ||
62 | ||
63 | /* | |
64 | * This returns the number of iovecs needed to log the given efi item. | |
65 | * We only need 1 iovec for an efi item. It just logs the efi_log_format | |
66 | * structure. | |
67 | */ | |
68 | /*ARGSUSED*/ | |
69 | STATIC uint | |
70 | xfs_efi_item_size(xfs_efi_log_item_t *efip) | |
71 | { | |
72 | return 1; | |
73 | } | |
74 | ||
75 | /* | |
76 | * This is called to fill in the vector of log iovecs for the | |
77 | * given efi log item. We use only 1 iovec, and we point that | |
78 | * at the efi_log_format structure embedded in the efi item. | |
79 | * It is at this point that we assert that all of the extent | |
80 | * slots in the efi item have been filled. | |
81 | */ | |
82 | STATIC void | |
83 | xfs_efi_item_format(xfs_efi_log_item_t *efip, | |
84 | xfs_log_iovec_t *log_vector) | |
85 | { | |
86 | uint size; | |
87 | ||
88 | ASSERT(efip->efi_next_extent == efip->efi_format.efi_nextents); | |
89 | ||
90 | efip->efi_format.efi_type = XFS_LI_EFI; | |
91 | ||
92 | size = sizeof(xfs_efi_log_format_t); | |
93 | size += (efip->efi_format.efi_nextents - 1) * sizeof(xfs_extent_t); | |
94 | efip->efi_format.efi_size = 1; | |
95 | ||
96 | log_vector->i_addr = (xfs_caddr_t)&(efip->efi_format); | |
97 | log_vector->i_len = size; | |
98 | ASSERT(size >= sizeof(xfs_efi_log_format_t)); | |
99 | } | |
100 | ||
101 | ||
102 | /* | |
103 | * Pinning has no meaning for an efi item, so just return. | |
104 | */ | |
105 | /*ARGSUSED*/ | |
106 | STATIC void | |
107 | xfs_efi_item_pin(xfs_efi_log_item_t *efip) | |
108 | { | |
109 | return; | |
110 | } | |
111 | ||
112 | ||
113 | /* | |
114 | * While EFIs cannot really be pinned, the unpin operation is the | |
115 | * last place at which the EFI is manipulated during a transaction. | |
116 | * Here we coordinate with xfs_efi_cancel() to determine who gets to | |
117 | * free the EFI. | |
118 | */ | |
119 | /*ARGSUSED*/ | |
120 | STATIC void | |
121 | xfs_efi_item_unpin(xfs_efi_log_item_t *efip, int stale) | |
122 | { | |
123 | int nexts; | |
124 | int size; | |
125 | xfs_mount_t *mp; | |
126 | SPLDECL(s); | |
127 | ||
128 | mp = efip->efi_item.li_mountp; | |
129 | AIL_LOCK(mp, s); | |
130 | if (efip->efi_flags & XFS_EFI_CANCELED) { | |
131 | /* | |
132 | * xfs_trans_delete_ail() drops the AIL lock. | |
133 | */ | |
134 | xfs_trans_delete_ail(mp, (xfs_log_item_t *)efip, s); | |
135 | ||
136 | nexts = efip->efi_format.efi_nextents; | |
137 | if (nexts > XFS_EFI_MAX_FAST_EXTENTS) { | |
138 | size = sizeof(xfs_efi_log_item_t); | |
139 | size += (nexts - 1) * sizeof(xfs_extent_t); | |
140 | kmem_free(efip, size); | |
141 | } else { | |
142 | kmem_zone_free(xfs_efi_zone, efip); | |
143 | } | |
144 | } else { | |
145 | efip->efi_flags |= XFS_EFI_COMMITTED; | |
146 | AIL_UNLOCK(mp, s); | |
147 | } | |
148 | ||
149 | return; | |
150 | } | |
151 | ||
152 | /* | |
153 | * like unpin only we have to also clear the xaction descriptor | |
154 | * pointing the log item if we free the item. This routine duplicates | |
155 | * unpin because efi_flags is protected by the AIL lock. Freeing | |
156 | * the descriptor and then calling unpin would force us to drop the AIL | |
157 | * lock which would open up a race condition. | |
158 | */ | |
159 | STATIC void | |
160 | xfs_efi_item_unpin_remove(xfs_efi_log_item_t *efip, xfs_trans_t *tp) | |
161 | { | |
162 | int nexts; | |
163 | int size; | |
164 | xfs_mount_t *mp; | |
165 | xfs_log_item_desc_t *lidp; | |
166 | SPLDECL(s); | |
167 | ||
168 | mp = efip->efi_item.li_mountp; | |
169 | AIL_LOCK(mp, s); | |
170 | if (efip->efi_flags & XFS_EFI_CANCELED) { | |
171 | /* | |
172 | * free the xaction descriptor pointing to this item | |
173 | */ | |
174 | lidp = xfs_trans_find_item(tp, (xfs_log_item_t *) efip); | |
175 | xfs_trans_free_item(tp, lidp); | |
176 | /* | |
177 | * pull the item off the AIL. | |
178 | * xfs_trans_delete_ail() drops the AIL lock. | |
179 | */ | |
180 | xfs_trans_delete_ail(mp, (xfs_log_item_t *)efip, s); | |
181 | /* | |
182 | * now free the item itself | |
183 | */ | |
184 | nexts = efip->efi_format.efi_nextents; | |
185 | if (nexts > XFS_EFI_MAX_FAST_EXTENTS) { | |
186 | size = sizeof(xfs_efi_log_item_t); | |
187 | size += (nexts - 1) * sizeof(xfs_extent_t); | |
188 | kmem_free(efip, size); | |
189 | } else { | |
190 | kmem_zone_free(xfs_efi_zone, efip); | |
191 | } | |
192 | } else { | |
193 | efip->efi_flags |= XFS_EFI_COMMITTED; | |
194 | AIL_UNLOCK(mp, s); | |
195 | } | |
196 | ||
197 | return; | |
198 | } | |
199 | ||
200 | /* | |
201 | * Efi items have no locking or pushing. However, since EFIs are | |
202 | * pulled from the AIL when their corresponding EFDs are committed | |
203 | * to disk, their situation is very similar to being pinned. Return | |
204 | * XFS_ITEM_PINNED so that the caller will eventually flush the log. | |
205 | * This should help in getting the EFI out of the AIL. | |
206 | */ | |
207 | /*ARGSUSED*/ | |
208 | STATIC uint | |
209 | xfs_efi_item_trylock(xfs_efi_log_item_t *efip) | |
210 | { | |
211 | return XFS_ITEM_PINNED; | |
212 | } | |
213 | ||
214 | /* | |
215 | * Efi items have no locking, so just return. | |
216 | */ | |
217 | /*ARGSUSED*/ | |
218 | STATIC void | |
219 | xfs_efi_item_unlock(xfs_efi_log_item_t *efip) | |
220 | { | |
221 | if (efip->efi_item.li_flags & XFS_LI_ABORTED) | |
222 | xfs_efi_item_abort(efip); | |
223 | return; | |
224 | } | |
225 | ||
226 | /* | |
227 | * The EFI is logged only once and cannot be moved in the log, so | |
228 | * simply return the lsn at which it's been logged. The canceled | |
229 | * flag is not paid any attention here. Checking for that is delayed | |
230 | * until the EFI is unpinned. | |
231 | */ | |
232 | /*ARGSUSED*/ | |
233 | STATIC xfs_lsn_t | |
234 | xfs_efi_item_committed(xfs_efi_log_item_t *efip, xfs_lsn_t lsn) | |
235 | { | |
236 | return lsn; | |
237 | } | |
238 | ||
239 | /* | |
240 | * This is called when the transaction logging the EFI is aborted. | |
241 | * Free up the EFI and return. No need to clean up the slot for | |
242 | * the item in the transaction. That was done by the unpin code | |
243 | * which is called prior to this routine in the abort/fs-shutdown path. | |
244 | */ | |
245 | STATIC void | |
246 | xfs_efi_item_abort(xfs_efi_log_item_t *efip) | |
247 | { | |
248 | int nexts; | |
249 | int size; | |
250 | ||
251 | nexts = efip->efi_format.efi_nextents; | |
252 | if (nexts > XFS_EFI_MAX_FAST_EXTENTS) { | |
253 | size = sizeof(xfs_efi_log_item_t); | |
254 | size += (nexts - 1) * sizeof(xfs_extent_t); | |
255 | kmem_free(efip, size); | |
256 | } else { | |
257 | kmem_zone_free(xfs_efi_zone, efip); | |
258 | } | |
259 | return; | |
260 | } | |
261 | ||
262 | /* | |
263 | * There isn't much you can do to push on an efi item. It is simply | |
264 | * stuck waiting for all of its corresponding efd items to be | |
265 | * committed to disk. | |
266 | */ | |
267 | /*ARGSUSED*/ | |
268 | STATIC void | |
269 | xfs_efi_item_push(xfs_efi_log_item_t *efip) | |
270 | { | |
271 | return; | |
272 | } | |
273 | ||
274 | /* | |
275 | * The EFI dependency tracking op doesn't do squat. It can't because | |
276 | * it doesn't know where the free extent is coming from. The dependency | |
277 | * tracking has to be handled by the "enclosing" metadata object. For | |
278 | * example, for inodes, the inode is locked throughout the extent freeing | |
279 | * so the dependency should be recorded there. | |
280 | */ | |
281 | /*ARGSUSED*/ | |
282 | STATIC void | |
283 | xfs_efi_item_committing(xfs_efi_log_item_t *efip, xfs_lsn_t lsn) | |
284 | { | |
285 | return; | |
286 | } | |
287 | ||
288 | /* | |
289 | * This is the ops vector shared by all efi log items. | |
290 | */ | |
291 | struct xfs_item_ops xfs_efi_item_ops = { | |
292 | .iop_size = (uint(*)(xfs_log_item_t*))xfs_efi_item_size, | |
293 | .iop_format = (void(*)(xfs_log_item_t*, xfs_log_iovec_t*)) | |
294 | xfs_efi_item_format, | |
295 | .iop_pin = (void(*)(xfs_log_item_t*))xfs_efi_item_pin, | |
296 | .iop_unpin = (void(*)(xfs_log_item_t*, int))xfs_efi_item_unpin, | |
297 | .iop_unpin_remove = (void(*)(xfs_log_item_t*, xfs_trans_t *)) | |
298 | xfs_efi_item_unpin_remove, | |
299 | .iop_trylock = (uint(*)(xfs_log_item_t*))xfs_efi_item_trylock, | |
300 | .iop_unlock = (void(*)(xfs_log_item_t*))xfs_efi_item_unlock, | |
301 | .iop_committed = (xfs_lsn_t(*)(xfs_log_item_t*, xfs_lsn_t)) | |
302 | xfs_efi_item_committed, | |
303 | .iop_push = (void(*)(xfs_log_item_t*))xfs_efi_item_push, | |
304 | .iop_abort = (void(*)(xfs_log_item_t*))xfs_efi_item_abort, | |
305 | .iop_pushbuf = NULL, | |
306 | .iop_committing = (void(*)(xfs_log_item_t*, xfs_lsn_t)) | |
307 | xfs_efi_item_committing | |
308 | }; | |
309 | ||
310 | ||
311 | /* | |
312 | * Allocate and initialize an efi item with the given number of extents. | |
313 | */ | |
314 | xfs_efi_log_item_t * | |
315 | xfs_efi_init(xfs_mount_t *mp, | |
316 | uint nextents) | |
317 | ||
318 | { | |
319 | xfs_efi_log_item_t *efip; | |
320 | uint size; | |
321 | ||
322 | ASSERT(nextents > 0); | |
323 | if (nextents > XFS_EFI_MAX_FAST_EXTENTS) { | |
324 | size = (uint)(sizeof(xfs_efi_log_item_t) + | |
325 | ((nextents - 1) * sizeof(xfs_extent_t))); | |
326 | efip = (xfs_efi_log_item_t*)kmem_zalloc(size, KM_SLEEP); | |
327 | } else { | |
328 | efip = (xfs_efi_log_item_t*)kmem_zone_zalloc(xfs_efi_zone, | |
329 | KM_SLEEP); | |
330 | } | |
331 | ||
332 | efip->efi_item.li_type = XFS_LI_EFI; | |
333 | efip->efi_item.li_ops = &xfs_efi_item_ops; | |
334 | efip->efi_item.li_mountp = mp; | |
335 | efip->efi_format.efi_nextents = nextents; | |
336 | efip->efi_format.efi_id = (__psint_t)(void*)efip; | |
337 | ||
338 | return (efip); | |
339 | } | |
340 | ||
341 | /* | |
342 | * This is called by the efd item code below to release references to | |
343 | * the given efi item. Each efd calls this with the number of | |
344 | * extents that it has logged, and when the sum of these reaches | |
345 | * the total number of extents logged by this efi item we can free | |
346 | * the efi item. | |
347 | * | |
348 | * Freeing the efi item requires that we remove it from the AIL. | |
349 | * We'll use the AIL lock to protect our counters as well as | |
350 | * the removal from the AIL. | |
351 | */ | |
352 | void | |
353 | xfs_efi_release(xfs_efi_log_item_t *efip, | |
354 | uint nextents) | |
355 | { | |
356 | xfs_mount_t *mp; | |
357 | int extents_left; | |
358 | uint size; | |
359 | int nexts; | |
360 | SPLDECL(s); | |
361 | ||
362 | mp = efip->efi_item.li_mountp; | |
363 | ASSERT(efip->efi_next_extent > 0); | |
364 | ASSERT(efip->efi_flags & XFS_EFI_COMMITTED); | |
365 | ||
366 | AIL_LOCK(mp, s); | |
367 | ASSERT(efip->efi_next_extent >= nextents); | |
368 | efip->efi_next_extent -= nextents; | |
369 | extents_left = efip->efi_next_extent; | |
370 | if (extents_left == 0) { | |
371 | /* | |
372 | * xfs_trans_delete_ail() drops the AIL lock. | |
373 | */ | |
374 | xfs_trans_delete_ail(mp, (xfs_log_item_t *)efip, s); | |
375 | } else { | |
376 | AIL_UNLOCK(mp, s); | |
377 | } | |
378 | ||
379 | if (extents_left == 0) { | |
380 | nexts = efip->efi_format.efi_nextents; | |
381 | if (nexts > XFS_EFI_MAX_FAST_EXTENTS) { | |
382 | size = sizeof(xfs_efi_log_item_t); | |
383 | size += (nexts - 1) * sizeof(xfs_extent_t); | |
384 | kmem_free(efip, size); | |
385 | } else { | |
386 | kmem_zone_free(xfs_efi_zone, efip); | |
387 | } | |
388 | } | |
389 | } | |
390 | ||
391 | /* | |
392 | * This is called when the transaction that should be committing the | |
393 | * EFD corresponding to the given EFI is aborted. The committed and | |
394 | * canceled flags are used to coordinate the freeing of the EFI and | |
395 | * the references by the transaction that committed it. | |
396 | */ | |
397 | STATIC void | |
398 | xfs_efi_cancel( | |
399 | xfs_efi_log_item_t *efip) | |
400 | { | |
401 | int nexts; | |
402 | int size; | |
403 | xfs_mount_t *mp; | |
404 | SPLDECL(s); | |
405 | ||
406 | mp = efip->efi_item.li_mountp; | |
407 | AIL_LOCK(mp, s); | |
408 | if (efip->efi_flags & XFS_EFI_COMMITTED) { | |
409 | /* | |
410 | * xfs_trans_delete_ail() drops the AIL lock. | |
411 | */ | |
412 | xfs_trans_delete_ail(mp, (xfs_log_item_t *)efip, s); | |
413 | ||
414 | nexts = efip->efi_format.efi_nextents; | |
415 | if (nexts > XFS_EFI_MAX_FAST_EXTENTS) { | |
416 | size = sizeof(xfs_efi_log_item_t); | |
417 | size += (nexts - 1) * sizeof(xfs_extent_t); | |
418 | kmem_free(efip, size); | |
419 | } else { | |
420 | kmem_zone_free(xfs_efi_zone, efip); | |
421 | } | |
422 | } else { | |
423 | efip->efi_flags |= XFS_EFI_CANCELED; | |
424 | AIL_UNLOCK(mp, s); | |
425 | } | |
426 | ||
427 | return; | |
428 | } | |
429 | ||
430 | ||
431 | ||
432 | ||
433 | ||
434 | /* | |
435 | * This returns the number of iovecs needed to log the given efd item. | |
436 | * We only need 1 iovec for an efd item. It just logs the efd_log_format | |
437 | * structure. | |
438 | */ | |
439 | /*ARGSUSED*/ | |
440 | STATIC uint | |
441 | xfs_efd_item_size(xfs_efd_log_item_t *efdp) | |
442 | { | |
443 | return 1; | |
444 | } | |
445 | ||
446 | /* | |
447 | * This is called to fill in the vector of log iovecs for the | |
448 | * given efd log item. We use only 1 iovec, and we point that | |
449 | * at the efd_log_format structure embedded in the efd item. | |
450 | * It is at this point that we assert that all of the extent | |
451 | * slots in the efd item have been filled. | |
452 | */ | |
453 | STATIC void | |
454 | xfs_efd_item_format(xfs_efd_log_item_t *efdp, | |
455 | xfs_log_iovec_t *log_vector) | |
456 | { | |
457 | uint size; | |
458 | ||
459 | ASSERT(efdp->efd_next_extent == efdp->efd_format.efd_nextents); | |
460 | ||
461 | efdp->efd_format.efd_type = XFS_LI_EFD; | |
462 | ||
463 | size = sizeof(xfs_efd_log_format_t); | |
464 | size += (efdp->efd_format.efd_nextents - 1) * sizeof(xfs_extent_t); | |
465 | efdp->efd_format.efd_size = 1; | |
466 | ||
467 | log_vector->i_addr = (xfs_caddr_t)&(efdp->efd_format); | |
468 | log_vector->i_len = size; | |
469 | ASSERT(size >= sizeof(xfs_efd_log_format_t)); | |
470 | } | |
471 | ||
472 | ||
473 | /* | |
474 | * Pinning has no meaning for an efd item, so just return. | |
475 | */ | |
476 | /*ARGSUSED*/ | |
477 | STATIC void | |
478 | xfs_efd_item_pin(xfs_efd_log_item_t *efdp) | |
479 | { | |
480 | return; | |
481 | } | |
482 | ||
483 | ||
484 | /* | |
485 | * Since pinning has no meaning for an efd item, unpinning does | |
486 | * not either. | |
487 | */ | |
488 | /*ARGSUSED*/ | |
489 | STATIC void | |
490 | xfs_efd_item_unpin(xfs_efd_log_item_t *efdp, int stale) | |
491 | { | |
492 | return; | |
493 | } | |
494 | ||
495 | /*ARGSUSED*/ | |
496 | STATIC void | |
497 | xfs_efd_item_unpin_remove(xfs_efd_log_item_t *efdp, xfs_trans_t *tp) | |
498 | { | |
499 | return; | |
500 | } | |
501 | ||
502 | /* | |
503 | * Efd items have no locking, so just return success. | |
504 | */ | |
505 | /*ARGSUSED*/ | |
506 | STATIC uint | |
507 | xfs_efd_item_trylock(xfs_efd_log_item_t *efdp) | |
508 | { | |
509 | return XFS_ITEM_LOCKED; | |
510 | } | |
511 | ||
512 | /* | |
513 | * Efd items have no locking or pushing, so return failure | |
514 | * so that the caller doesn't bother with us. | |
515 | */ | |
516 | /*ARGSUSED*/ | |
517 | STATIC void | |
518 | xfs_efd_item_unlock(xfs_efd_log_item_t *efdp) | |
519 | { | |
520 | if (efdp->efd_item.li_flags & XFS_LI_ABORTED) | |
521 | xfs_efd_item_abort(efdp); | |
522 | return; | |
523 | } | |
524 | ||
525 | /* | |
526 | * When the efd item is committed to disk, all we need to do | |
527 | * is delete our reference to our partner efi item and then | |
528 | * free ourselves. Since we're freeing ourselves we must | |
529 | * return -1 to keep the transaction code from further referencing | |
530 | * this item. | |
531 | */ | |
532 | /*ARGSUSED*/ | |
533 | STATIC xfs_lsn_t | |
534 | xfs_efd_item_committed(xfs_efd_log_item_t *efdp, xfs_lsn_t lsn) | |
535 | { | |
536 | uint size; | |
537 | int nexts; | |
538 | ||
539 | /* | |
540 | * If we got a log I/O error, it's always the case that the LR with the | |
541 | * EFI got unpinned and freed before the EFD got aborted. | |
542 | */ | |
543 | if ((efdp->efd_item.li_flags & XFS_LI_ABORTED) == 0) | |
544 | xfs_efi_release(efdp->efd_efip, efdp->efd_format.efd_nextents); | |
545 | ||
546 | nexts = efdp->efd_format.efd_nextents; | |
547 | if (nexts > XFS_EFD_MAX_FAST_EXTENTS) { | |
548 | size = sizeof(xfs_efd_log_item_t); | |
549 | size += (nexts - 1) * sizeof(xfs_extent_t); | |
550 | kmem_free(efdp, size); | |
551 | } else { | |
552 | kmem_zone_free(xfs_efd_zone, efdp); | |
553 | } | |
554 | ||
555 | return (xfs_lsn_t)-1; | |
556 | } | |
557 | ||
558 | /* | |
559 | * The transaction of which this EFD is a part has been aborted. | |
560 | * Inform its companion EFI of this fact and then clean up after | |
561 | * ourselves. No need to clean up the slot for the item in the | |
562 | * transaction. That was done by the unpin code which is called | |
563 | * prior to this routine in the abort/fs-shutdown path. | |
564 | */ | |
565 | STATIC void | |
566 | xfs_efd_item_abort(xfs_efd_log_item_t *efdp) | |
567 | { | |
568 | int nexts; | |
569 | int size; | |
570 | ||
571 | /* | |
572 | * If we got a log I/O error, it's always the case that the LR with the | |
573 | * EFI got unpinned and freed before the EFD got aborted. So don't | |
574 | * reference the EFI at all in that case. | |
575 | */ | |
576 | if ((efdp->efd_item.li_flags & XFS_LI_ABORTED) == 0) | |
577 | xfs_efi_cancel(efdp->efd_efip); | |
578 | ||
579 | nexts = efdp->efd_format.efd_nextents; | |
580 | if (nexts > XFS_EFD_MAX_FAST_EXTENTS) { | |
581 | size = sizeof(xfs_efd_log_item_t); | |
582 | size += (nexts - 1) * sizeof(xfs_extent_t); | |
583 | kmem_free(efdp, size); | |
584 | } else { | |
585 | kmem_zone_free(xfs_efd_zone, efdp); | |
586 | } | |
587 | return; | |
588 | } | |
589 | ||
590 | /* | |
591 | * There isn't much you can do to push on an efd item. It is simply | |
592 | * stuck waiting for the log to be flushed to disk. | |
593 | */ | |
594 | /*ARGSUSED*/ | |
595 | STATIC void | |
596 | xfs_efd_item_push(xfs_efd_log_item_t *efdp) | |
597 | { | |
598 | return; | |
599 | } | |
600 | ||
601 | /* | |
602 | * The EFD dependency tracking op doesn't do squat. It can't because | |
603 | * it doesn't know where the free extent is coming from. The dependency | |
604 | * tracking has to be handled by the "enclosing" metadata object. For | |
605 | * example, for inodes, the inode is locked throughout the extent freeing | |
606 | * so the dependency should be recorded there. | |
607 | */ | |
608 | /*ARGSUSED*/ | |
609 | STATIC void | |
610 | xfs_efd_item_committing(xfs_efd_log_item_t *efip, xfs_lsn_t lsn) | |
611 | { | |
612 | return; | |
613 | } | |
614 | ||
615 | /* | |
616 | * This is the ops vector shared by all efd log items. | |
617 | */ | |
618 | struct xfs_item_ops xfs_efd_item_ops = { | |
619 | .iop_size = (uint(*)(xfs_log_item_t*))xfs_efd_item_size, | |
620 | .iop_format = (void(*)(xfs_log_item_t*, xfs_log_iovec_t*)) | |
621 | xfs_efd_item_format, | |
622 | .iop_pin = (void(*)(xfs_log_item_t*))xfs_efd_item_pin, | |
623 | .iop_unpin = (void(*)(xfs_log_item_t*, int))xfs_efd_item_unpin, | |
624 | .iop_unpin_remove = (void(*)(xfs_log_item_t*, xfs_trans_t*)) | |
625 | xfs_efd_item_unpin_remove, | |
626 | .iop_trylock = (uint(*)(xfs_log_item_t*))xfs_efd_item_trylock, | |
627 | .iop_unlock = (void(*)(xfs_log_item_t*))xfs_efd_item_unlock, | |
628 | .iop_committed = (xfs_lsn_t(*)(xfs_log_item_t*, xfs_lsn_t)) | |
629 | xfs_efd_item_committed, | |
630 | .iop_push = (void(*)(xfs_log_item_t*))xfs_efd_item_push, | |
631 | .iop_abort = (void(*)(xfs_log_item_t*))xfs_efd_item_abort, | |
632 | .iop_pushbuf = NULL, | |
633 | .iop_committing = (void(*)(xfs_log_item_t*, xfs_lsn_t)) | |
634 | xfs_efd_item_committing | |
635 | }; | |
636 | ||
637 | ||
638 | /* | |
639 | * Allocate and initialize an efd item with the given number of extents. | |
640 | */ | |
641 | xfs_efd_log_item_t * | |
642 | xfs_efd_init(xfs_mount_t *mp, | |
643 | xfs_efi_log_item_t *efip, | |
644 | uint nextents) | |
645 | ||
646 | { | |
647 | xfs_efd_log_item_t *efdp; | |
648 | uint size; | |
649 | ||
650 | ASSERT(nextents > 0); | |
651 | if (nextents > XFS_EFD_MAX_FAST_EXTENTS) { | |
652 | size = (uint)(sizeof(xfs_efd_log_item_t) + | |
653 | ((nextents - 1) * sizeof(xfs_extent_t))); | |
654 | efdp = (xfs_efd_log_item_t*)kmem_zalloc(size, KM_SLEEP); | |
655 | } else { | |
656 | efdp = (xfs_efd_log_item_t*)kmem_zone_zalloc(xfs_efd_zone, | |
657 | KM_SLEEP); | |
658 | } | |
659 | ||
660 | efdp->efd_item.li_type = XFS_LI_EFD; | |
661 | efdp->efd_item.li_ops = &xfs_efd_item_ops; | |
662 | efdp->efd_item.li_mountp = mp; | |
663 | efdp->efd_efip = efip; | |
664 | efdp->efd_format.efd_nextents = nextents; | |
665 | efdp->efd_format.efd_efi_id = efip->efi_format.efi_id; | |
666 | ||
667 | return (efdp); | |
668 | } |