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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 | ||
7d795ca3 CH |
62 | void |
63 | xfs_efi_item_free(xfs_efi_log_item_t *efip) | |
64 | { | |
65 | int nexts = efip->efi_format.efi_nextents; | |
66 | ||
67 | if (nexts > XFS_EFI_MAX_FAST_EXTENTS) { | |
68 | kmem_free(efip, sizeof(xfs_efi_log_item_t) + | |
69 | (nexts - 1) * sizeof(xfs_extent_t)); | |
70 | } else { | |
71 | kmem_zone_free(xfs_efi_zone, efip); | |
72 | } | |
73 | } | |
1da177e4 LT |
74 | |
75 | /* | |
76 | * This returns the number of iovecs needed to log the given efi item. | |
77 | * We only need 1 iovec for an efi item. It just logs the efi_log_format | |
78 | * structure. | |
79 | */ | |
80 | /*ARGSUSED*/ | |
81 | STATIC uint | |
82 | xfs_efi_item_size(xfs_efi_log_item_t *efip) | |
83 | { | |
84 | return 1; | |
85 | } | |
86 | ||
87 | /* | |
88 | * This is called to fill in the vector of log iovecs for the | |
89 | * given efi log item. We use only 1 iovec, and we point that | |
90 | * at the efi_log_format structure embedded in the efi item. | |
91 | * It is at this point that we assert that all of the extent | |
92 | * slots in the efi item have been filled. | |
93 | */ | |
94 | STATIC void | |
95 | xfs_efi_item_format(xfs_efi_log_item_t *efip, | |
96 | xfs_log_iovec_t *log_vector) | |
97 | { | |
98 | uint size; | |
99 | ||
100 | ASSERT(efip->efi_next_extent == efip->efi_format.efi_nextents); | |
101 | ||
102 | efip->efi_format.efi_type = XFS_LI_EFI; | |
103 | ||
104 | size = sizeof(xfs_efi_log_format_t); | |
105 | size += (efip->efi_format.efi_nextents - 1) * sizeof(xfs_extent_t); | |
106 | efip->efi_format.efi_size = 1; | |
107 | ||
108 | log_vector->i_addr = (xfs_caddr_t)&(efip->efi_format); | |
109 | log_vector->i_len = size; | |
7e9c6396 | 110 | XLOG_VEC_SET_TYPE(log_vector, XLOG_REG_TYPE_EFI_FORMAT); |
1da177e4 LT |
111 | ASSERT(size >= sizeof(xfs_efi_log_format_t)); |
112 | } | |
113 | ||
114 | ||
115 | /* | |
116 | * Pinning has no meaning for an efi item, so just return. | |
117 | */ | |
118 | /*ARGSUSED*/ | |
119 | STATIC void | |
120 | xfs_efi_item_pin(xfs_efi_log_item_t *efip) | |
121 | { | |
122 | return; | |
123 | } | |
124 | ||
125 | ||
126 | /* | |
127 | * While EFIs cannot really be pinned, the unpin operation is the | |
128 | * last place at which the EFI is manipulated during a transaction. | |
129 | * Here we coordinate with xfs_efi_cancel() to determine who gets to | |
130 | * free the EFI. | |
131 | */ | |
132 | /*ARGSUSED*/ | |
133 | STATIC void | |
134 | xfs_efi_item_unpin(xfs_efi_log_item_t *efip, int stale) | |
135 | { | |
1da177e4 LT |
136 | xfs_mount_t *mp; |
137 | SPLDECL(s); | |
138 | ||
139 | mp = efip->efi_item.li_mountp; | |
140 | AIL_LOCK(mp, s); | |
141 | if (efip->efi_flags & XFS_EFI_CANCELED) { | |
142 | /* | |
143 | * xfs_trans_delete_ail() drops the AIL lock. | |
144 | */ | |
145 | xfs_trans_delete_ail(mp, (xfs_log_item_t *)efip, s); | |
7d795ca3 | 146 | xfs_efi_item_free(efip); |
1da177e4 LT |
147 | } else { |
148 | efip->efi_flags |= XFS_EFI_COMMITTED; | |
149 | AIL_UNLOCK(mp, s); | |
150 | } | |
1da177e4 LT |
151 | } |
152 | ||
153 | /* | |
154 | * like unpin only we have to also clear the xaction descriptor | |
155 | * pointing the log item if we free the item. This routine duplicates | |
156 | * unpin because efi_flags is protected by the AIL lock. Freeing | |
157 | * the descriptor and then calling unpin would force us to drop the AIL | |
158 | * lock which would open up a race condition. | |
159 | */ | |
160 | STATIC void | |
161 | xfs_efi_item_unpin_remove(xfs_efi_log_item_t *efip, xfs_trans_t *tp) | |
162 | { | |
1da177e4 LT |
163 | xfs_mount_t *mp; |
164 | xfs_log_item_desc_t *lidp; | |
165 | SPLDECL(s); | |
166 | ||
167 | mp = efip->efi_item.li_mountp; | |
168 | AIL_LOCK(mp, s); | |
169 | if (efip->efi_flags & XFS_EFI_CANCELED) { | |
170 | /* | |
171 | * free the xaction descriptor pointing to this item | |
172 | */ | |
173 | lidp = xfs_trans_find_item(tp, (xfs_log_item_t *) efip); | |
174 | xfs_trans_free_item(tp, lidp); | |
175 | /* | |
176 | * pull the item off the AIL. | |
177 | * xfs_trans_delete_ail() drops the AIL lock. | |
178 | */ | |
179 | xfs_trans_delete_ail(mp, (xfs_log_item_t *)efip, s); | |
7d795ca3 | 180 | xfs_efi_item_free(efip); |
1da177e4 LT |
181 | } else { |
182 | efip->efi_flags |= XFS_EFI_COMMITTED; | |
183 | AIL_UNLOCK(mp, s); | |
184 | } | |
1da177e4 LT |
185 | } |
186 | ||
187 | /* | |
188 | * Efi items have no locking or pushing. However, since EFIs are | |
189 | * pulled from the AIL when their corresponding EFDs are committed | |
190 | * to disk, their situation is very similar to being pinned. Return | |
191 | * XFS_ITEM_PINNED so that the caller will eventually flush the log. | |
192 | * This should help in getting the EFI out of the AIL. | |
193 | */ | |
194 | /*ARGSUSED*/ | |
195 | STATIC uint | |
196 | xfs_efi_item_trylock(xfs_efi_log_item_t *efip) | |
197 | { | |
198 | return XFS_ITEM_PINNED; | |
199 | } | |
200 | ||
201 | /* | |
202 | * Efi items have no locking, so just return. | |
203 | */ | |
204 | /*ARGSUSED*/ | |
205 | STATIC void | |
206 | xfs_efi_item_unlock(xfs_efi_log_item_t *efip) | |
207 | { | |
208 | if (efip->efi_item.li_flags & XFS_LI_ABORTED) | |
209 | xfs_efi_item_abort(efip); | |
210 | return; | |
211 | } | |
212 | ||
213 | /* | |
214 | * The EFI is logged only once and cannot be moved in the log, so | |
215 | * simply return the lsn at which it's been logged. The canceled | |
216 | * flag is not paid any attention here. Checking for that is delayed | |
217 | * until the EFI is unpinned. | |
218 | */ | |
219 | /*ARGSUSED*/ | |
220 | STATIC xfs_lsn_t | |
221 | xfs_efi_item_committed(xfs_efi_log_item_t *efip, xfs_lsn_t lsn) | |
222 | { | |
223 | return lsn; | |
224 | } | |
225 | ||
226 | /* | |
227 | * This is called when the transaction logging the EFI is aborted. | |
228 | * Free up the EFI and return. No need to clean up the slot for | |
229 | * the item in the transaction. That was done by the unpin code | |
230 | * which is called prior to this routine in the abort/fs-shutdown path. | |
231 | */ | |
232 | STATIC void | |
233 | xfs_efi_item_abort(xfs_efi_log_item_t *efip) | |
234 | { | |
7d795ca3 | 235 | xfs_efi_item_free(efip); |
1da177e4 LT |
236 | } |
237 | ||
238 | /* | |
239 | * There isn't much you can do to push on an efi item. It is simply | |
240 | * stuck waiting for all of its corresponding efd items to be | |
241 | * committed to disk. | |
242 | */ | |
243 | /*ARGSUSED*/ | |
244 | STATIC void | |
245 | xfs_efi_item_push(xfs_efi_log_item_t *efip) | |
246 | { | |
247 | return; | |
248 | } | |
249 | ||
250 | /* | |
251 | * The EFI dependency tracking op doesn't do squat. It can't because | |
252 | * it doesn't know where the free extent is coming from. The dependency | |
253 | * tracking has to be handled by the "enclosing" metadata object. For | |
254 | * example, for inodes, the inode is locked throughout the extent freeing | |
255 | * so the dependency should be recorded there. | |
256 | */ | |
257 | /*ARGSUSED*/ | |
258 | STATIC void | |
259 | xfs_efi_item_committing(xfs_efi_log_item_t *efip, xfs_lsn_t lsn) | |
260 | { | |
261 | return; | |
262 | } | |
263 | ||
264 | /* | |
265 | * This is the ops vector shared by all efi log items. | |
266 | */ | |
ba0f32d4 | 267 | STATIC struct xfs_item_ops xfs_efi_item_ops = { |
1da177e4 LT |
268 | .iop_size = (uint(*)(xfs_log_item_t*))xfs_efi_item_size, |
269 | .iop_format = (void(*)(xfs_log_item_t*, xfs_log_iovec_t*)) | |
270 | xfs_efi_item_format, | |
271 | .iop_pin = (void(*)(xfs_log_item_t*))xfs_efi_item_pin, | |
272 | .iop_unpin = (void(*)(xfs_log_item_t*, int))xfs_efi_item_unpin, | |
273 | .iop_unpin_remove = (void(*)(xfs_log_item_t*, xfs_trans_t *)) | |
274 | xfs_efi_item_unpin_remove, | |
275 | .iop_trylock = (uint(*)(xfs_log_item_t*))xfs_efi_item_trylock, | |
276 | .iop_unlock = (void(*)(xfs_log_item_t*))xfs_efi_item_unlock, | |
277 | .iop_committed = (xfs_lsn_t(*)(xfs_log_item_t*, xfs_lsn_t)) | |
278 | xfs_efi_item_committed, | |
279 | .iop_push = (void(*)(xfs_log_item_t*))xfs_efi_item_push, | |
280 | .iop_abort = (void(*)(xfs_log_item_t*))xfs_efi_item_abort, | |
281 | .iop_pushbuf = NULL, | |
282 | .iop_committing = (void(*)(xfs_log_item_t*, xfs_lsn_t)) | |
283 | xfs_efi_item_committing | |
284 | }; | |
285 | ||
286 | ||
287 | /* | |
288 | * Allocate and initialize an efi item with the given number of extents. | |
289 | */ | |
290 | xfs_efi_log_item_t * | |
291 | xfs_efi_init(xfs_mount_t *mp, | |
292 | uint nextents) | |
293 | ||
294 | { | |
295 | xfs_efi_log_item_t *efip; | |
296 | uint size; | |
297 | ||
298 | ASSERT(nextents > 0); | |
299 | if (nextents > XFS_EFI_MAX_FAST_EXTENTS) { | |
300 | size = (uint)(sizeof(xfs_efi_log_item_t) + | |
301 | ((nextents - 1) * sizeof(xfs_extent_t))); | |
302 | efip = (xfs_efi_log_item_t*)kmem_zalloc(size, KM_SLEEP); | |
303 | } else { | |
304 | efip = (xfs_efi_log_item_t*)kmem_zone_zalloc(xfs_efi_zone, | |
305 | KM_SLEEP); | |
306 | } | |
307 | ||
308 | efip->efi_item.li_type = XFS_LI_EFI; | |
309 | efip->efi_item.li_ops = &xfs_efi_item_ops; | |
310 | efip->efi_item.li_mountp = mp; | |
311 | efip->efi_format.efi_nextents = nextents; | |
312 | efip->efi_format.efi_id = (__psint_t)(void*)efip; | |
313 | ||
314 | return (efip); | |
315 | } | |
316 | ||
317 | /* | |
318 | * This is called by the efd item code below to release references to | |
319 | * the given efi item. Each efd calls this with the number of | |
320 | * extents that it has logged, and when the sum of these reaches | |
321 | * the total number of extents logged by this efi item we can free | |
322 | * the efi item. | |
323 | * | |
324 | * Freeing the efi item requires that we remove it from the AIL. | |
325 | * We'll use the AIL lock to protect our counters as well as | |
326 | * the removal from the AIL. | |
327 | */ | |
328 | void | |
329 | xfs_efi_release(xfs_efi_log_item_t *efip, | |
330 | uint nextents) | |
331 | { | |
332 | xfs_mount_t *mp; | |
333 | int extents_left; | |
1da177e4 LT |
334 | SPLDECL(s); |
335 | ||
336 | mp = efip->efi_item.li_mountp; | |
337 | ASSERT(efip->efi_next_extent > 0); | |
338 | ASSERT(efip->efi_flags & XFS_EFI_COMMITTED); | |
339 | ||
340 | AIL_LOCK(mp, s); | |
341 | ASSERT(efip->efi_next_extent >= nextents); | |
342 | efip->efi_next_extent -= nextents; | |
343 | extents_left = efip->efi_next_extent; | |
344 | if (extents_left == 0) { | |
345 | /* | |
346 | * xfs_trans_delete_ail() drops the AIL lock. | |
347 | */ | |
348 | xfs_trans_delete_ail(mp, (xfs_log_item_t *)efip, s); | |
7d795ca3 | 349 | xfs_efi_item_free(efip); |
1da177e4 LT |
350 | } else { |
351 | AIL_UNLOCK(mp, s); | |
352 | } | |
1da177e4 LT |
353 | } |
354 | ||
355 | /* | |
356 | * This is called when the transaction that should be committing the | |
357 | * EFD corresponding to the given EFI is aborted. The committed and | |
358 | * canceled flags are used to coordinate the freeing of the EFI and | |
359 | * the references by the transaction that committed it. | |
360 | */ | |
361 | STATIC void | |
362 | xfs_efi_cancel( | |
363 | xfs_efi_log_item_t *efip) | |
364 | { | |
1da177e4 LT |
365 | xfs_mount_t *mp; |
366 | SPLDECL(s); | |
367 | ||
368 | mp = efip->efi_item.li_mountp; | |
369 | AIL_LOCK(mp, s); | |
370 | if (efip->efi_flags & XFS_EFI_COMMITTED) { | |
371 | /* | |
372 | * xfs_trans_delete_ail() drops the AIL lock. | |
373 | */ | |
374 | xfs_trans_delete_ail(mp, (xfs_log_item_t *)efip, s); | |
7d795ca3 | 375 | xfs_efi_item_free(efip); |
1da177e4 LT |
376 | } else { |
377 | efip->efi_flags |= XFS_EFI_CANCELED; | |
378 | AIL_UNLOCK(mp, s); | |
379 | } | |
1da177e4 LT |
380 | } |
381 | ||
7d795ca3 CH |
382 | STATIC void |
383 | xfs_efd_item_free(xfs_efd_log_item_t *efdp) | |
384 | { | |
385 | int nexts = efdp->efd_format.efd_nextents; | |
1da177e4 | 386 | |
7d795ca3 CH |
387 | if (nexts > XFS_EFD_MAX_FAST_EXTENTS) { |
388 | kmem_free(efdp, sizeof(xfs_efd_log_item_t) + | |
389 | (nexts - 1) * sizeof(xfs_extent_t)); | |
390 | } else { | |
391 | kmem_zone_free(xfs_efd_zone, efdp); | |
392 | } | |
393 | } | |
1da177e4 LT |
394 | |
395 | /* | |
396 | * This returns the number of iovecs needed to log the given efd item. | |
397 | * We only need 1 iovec for an efd item. It just logs the efd_log_format | |
398 | * structure. | |
399 | */ | |
400 | /*ARGSUSED*/ | |
401 | STATIC uint | |
402 | xfs_efd_item_size(xfs_efd_log_item_t *efdp) | |
403 | { | |
404 | return 1; | |
405 | } | |
406 | ||
407 | /* | |
408 | * This is called to fill in the vector of log iovecs for the | |
409 | * given efd log item. We use only 1 iovec, and we point that | |
410 | * at the efd_log_format structure embedded in the efd item. | |
411 | * It is at this point that we assert that all of the extent | |
412 | * slots in the efd item have been filled. | |
413 | */ | |
414 | STATIC void | |
415 | xfs_efd_item_format(xfs_efd_log_item_t *efdp, | |
416 | xfs_log_iovec_t *log_vector) | |
417 | { | |
418 | uint size; | |
419 | ||
420 | ASSERT(efdp->efd_next_extent == efdp->efd_format.efd_nextents); | |
421 | ||
422 | efdp->efd_format.efd_type = XFS_LI_EFD; | |
423 | ||
424 | size = sizeof(xfs_efd_log_format_t); | |
425 | size += (efdp->efd_format.efd_nextents - 1) * sizeof(xfs_extent_t); | |
426 | efdp->efd_format.efd_size = 1; | |
427 | ||
428 | log_vector->i_addr = (xfs_caddr_t)&(efdp->efd_format); | |
429 | log_vector->i_len = size; | |
7e9c6396 | 430 | XLOG_VEC_SET_TYPE(log_vector, XLOG_REG_TYPE_EFD_FORMAT); |
1da177e4 LT |
431 | ASSERT(size >= sizeof(xfs_efd_log_format_t)); |
432 | } | |
433 | ||
434 | ||
435 | /* | |
436 | * Pinning has no meaning for an efd item, so just return. | |
437 | */ | |
438 | /*ARGSUSED*/ | |
439 | STATIC void | |
440 | xfs_efd_item_pin(xfs_efd_log_item_t *efdp) | |
441 | { | |
442 | return; | |
443 | } | |
444 | ||
445 | ||
446 | /* | |
447 | * Since pinning has no meaning for an efd item, unpinning does | |
448 | * not either. | |
449 | */ | |
450 | /*ARGSUSED*/ | |
451 | STATIC void | |
452 | xfs_efd_item_unpin(xfs_efd_log_item_t *efdp, int stale) | |
453 | { | |
454 | return; | |
455 | } | |
456 | ||
457 | /*ARGSUSED*/ | |
458 | STATIC void | |
459 | xfs_efd_item_unpin_remove(xfs_efd_log_item_t *efdp, xfs_trans_t *tp) | |
460 | { | |
461 | return; | |
462 | } | |
463 | ||
464 | /* | |
465 | * Efd items have no locking, so just return success. | |
466 | */ | |
467 | /*ARGSUSED*/ | |
468 | STATIC uint | |
469 | xfs_efd_item_trylock(xfs_efd_log_item_t *efdp) | |
470 | { | |
471 | return XFS_ITEM_LOCKED; | |
472 | } | |
473 | ||
474 | /* | |
475 | * Efd items have no locking or pushing, so return failure | |
476 | * so that the caller doesn't bother with us. | |
477 | */ | |
478 | /*ARGSUSED*/ | |
479 | STATIC void | |
480 | xfs_efd_item_unlock(xfs_efd_log_item_t *efdp) | |
481 | { | |
482 | if (efdp->efd_item.li_flags & XFS_LI_ABORTED) | |
483 | xfs_efd_item_abort(efdp); | |
484 | return; | |
485 | } | |
486 | ||
487 | /* | |
488 | * When the efd item is committed to disk, all we need to do | |
489 | * is delete our reference to our partner efi item and then | |
490 | * free ourselves. Since we're freeing ourselves we must | |
491 | * return -1 to keep the transaction code from further referencing | |
492 | * this item. | |
493 | */ | |
494 | /*ARGSUSED*/ | |
495 | STATIC xfs_lsn_t | |
496 | xfs_efd_item_committed(xfs_efd_log_item_t *efdp, xfs_lsn_t lsn) | |
497 | { | |
1da177e4 LT |
498 | /* |
499 | * If we got a log I/O error, it's always the case that the LR with the | |
500 | * EFI got unpinned and freed before the EFD got aborted. | |
501 | */ | |
502 | if ((efdp->efd_item.li_flags & XFS_LI_ABORTED) == 0) | |
503 | xfs_efi_release(efdp->efd_efip, efdp->efd_format.efd_nextents); | |
504 | ||
7d795ca3 | 505 | xfs_efd_item_free(efdp); |
1da177e4 LT |
506 | return (xfs_lsn_t)-1; |
507 | } | |
508 | ||
509 | /* | |
510 | * The transaction of which this EFD is a part has been aborted. | |
511 | * Inform its companion EFI of this fact and then clean up after | |
512 | * ourselves. No need to clean up the slot for the item in the | |
513 | * transaction. That was done by the unpin code which is called | |
514 | * prior to this routine in the abort/fs-shutdown path. | |
515 | */ | |
516 | STATIC void | |
517 | xfs_efd_item_abort(xfs_efd_log_item_t *efdp) | |
518 | { | |
1da177e4 LT |
519 | /* |
520 | * If we got a log I/O error, it's always the case that the LR with the | |
521 | * EFI got unpinned and freed before the EFD got aborted. So don't | |
522 | * reference the EFI at all in that case. | |
523 | */ | |
524 | if ((efdp->efd_item.li_flags & XFS_LI_ABORTED) == 0) | |
525 | xfs_efi_cancel(efdp->efd_efip); | |
526 | ||
7d795ca3 | 527 | xfs_efd_item_free(efdp); |
1da177e4 LT |
528 | } |
529 | ||
530 | /* | |
531 | * There isn't much you can do to push on an efd item. It is simply | |
532 | * stuck waiting for the log to be flushed to disk. | |
533 | */ | |
534 | /*ARGSUSED*/ | |
535 | STATIC void | |
536 | xfs_efd_item_push(xfs_efd_log_item_t *efdp) | |
537 | { | |
538 | return; | |
539 | } | |
540 | ||
541 | /* | |
542 | * The EFD dependency tracking op doesn't do squat. It can't because | |
543 | * it doesn't know where the free extent is coming from. The dependency | |
544 | * tracking has to be handled by the "enclosing" metadata object. For | |
545 | * example, for inodes, the inode is locked throughout the extent freeing | |
546 | * so the dependency should be recorded there. | |
547 | */ | |
548 | /*ARGSUSED*/ | |
549 | STATIC void | |
550 | xfs_efd_item_committing(xfs_efd_log_item_t *efip, xfs_lsn_t lsn) | |
551 | { | |
552 | return; | |
553 | } | |
554 | ||
555 | /* | |
556 | * This is the ops vector shared by all efd log items. | |
557 | */ | |
ba0f32d4 | 558 | STATIC struct xfs_item_ops xfs_efd_item_ops = { |
1da177e4 LT |
559 | .iop_size = (uint(*)(xfs_log_item_t*))xfs_efd_item_size, |
560 | .iop_format = (void(*)(xfs_log_item_t*, xfs_log_iovec_t*)) | |
561 | xfs_efd_item_format, | |
562 | .iop_pin = (void(*)(xfs_log_item_t*))xfs_efd_item_pin, | |
563 | .iop_unpin = (void(*)(xfs_log_item_t*, int))xfs_efd_item_unpin, | |
564 | .iop_unpin_remove = (void(*)(xfs_log_item_t*, xfs_trans_t*)) | |
565 | xfs_efd_item_unpin_remove, | |
566 | .iop_trylock = (uint(*)(xfs_log_item_t*))xfs_efd_item_trylock, | |
567 | .iop_unlock = (void(*)(xfs_log_item_t*))xfs_efd_item_unlock, | |
568 | .iop_committed = (xfs_lsn_t(*)(xfs_log_item_t*, xfs_lsn_t)) | |
569 | xfs_efd_item_committed, | |
570 | .iop_push = (void(*)(xfs_log_item_t*))xfs_efd_item_push, | |
571 | .iop_abort = (void(*)(xfs_log_item_t*))xfs_efd_item_abort, | |
572 | .iop_pushbuf = NULL, | |
573 | .iop_committing = (void(*)(xfs_log_item_t*, xfs_lsn_t)) | |
574 | xfs_efd_item_committing | |
575 | }; | |
576 | ||
577 | ||
578 | /* | |
579 | * Allocate and initialize an efd item with the given number of extents. | |
580 | */ | |
581 | xfs_efd_log_item_t * | |
582 | xfs_efd_init(xfs_mount_t *mp, | |
583 | xfs_efi_log_item_t *efip, | |
584 | uint nextents) | |
585 | ||
586 | { | |
587 | xfs_efd_log_item_t *efdp; | |
588 | uint size; | |
589 | ||
590 | ASSERT(nextents > 0); | |
591 | if (nextents > XFS_EFD_MAX_FAST_EXTENTS) { | |
592 | size = (uint)(sizeof(xfs_efd_log_item_t) + | |
593 | ((nextents - 1) * sizeof(xfs_extent_t))); | |
594 | efdp = (xfs_efd_log_item_t*)kmem_zalloc(size, KM_SLEEP); | |
595 | } else { | |
596 | efdp = (xfs_efd_log_item_t*)kmem_zone_zalloc(xfs_efd_zone, | |
597 | KM_SLEEP); | |
598 | } | |
599 | ||
600 | efdp->efd_item.li_type = XFS_LI_EFD; | |
601 | efdp->efd_item.li_ops = &xfs_efd_item_ops; | |
602 | efdp->efd_item.li_mountp = mp; | |
603 | efdp->efd_efip = efip; | |
604 | efdp->efd_format.efd_nextents = nextents; | |
605 | efdp->efd_format.efd_efi_id = efip->efi_format.efi_id; | |
606 | ||
607 | return (efdp); | |
608 | } |