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1da177e4 LT |
1 | /* |
2 | * Copyright (c) 2000-2003 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 | #include "xfs.h" | |
34 | #include "xfs_fs.h" | |
35 | #include "xfs_inum.h" | |
36 | #include "xfs_log.h" | |
37 | #include "xfs_trans.h" | |
38 | #include "xfs_sb.h" | |
39 | #include "xfs_ag.h" | |
40 | #include "xfs_dir.h" | |
41 | #include "xfs_dir2.h" | |
42 | #include "xfs_alloc.h" | |
43 | #include "xfs_dmapi.h" | |
44 | #include "xfs_quota.h" | |
45 | #include "xfs_mount.h" | |
46 | #include "xfs_alloc_btree.h" | |
47 | #include "xfs_bmap_btree.h" | |
48 | #include "xfs_ialloc_btree.h" | |
49 | #include "xfs_btree.h" | |
50 | #include "xfs_ialloc.h" | |
51 | #include "xfs_attr_sf.h" | |
52 | #include "xfs_dir_sf.h" | |
53 | #include "xfs_dir2_sf.h" | |
54 | #include "xfs_dinode.h" | |
55 | #include "xfs_inode.h" | |
56 | #include "xfs_bmap.h" | |
57 | #include "xfs_bit.h" | |
58 | #include "xfs_rtalloc.h" | |
59 | #include "xfs_error.h" | |
60 | #include "xfs_itable.h" | |
61 | #include "xfs_rw.h" | |
62 | #include "xfs_acl.h" | |
63 | #include "xfs_cap.h" | |
64 | #include "xfs_mac.h" | |
65 | #include "xfs_attr.h" | |
66 | #include "xfs_buf_item.h" | |
67 | #include "xfs_trans_priv.h" | |
68 | ||
69 | #include "xfs_qm.h" | |
70 | ||
71 | ||
72 | /* | |
73 | * returns the number of iovecs needed to log the given dquot item. | |
74 | */ | |
75 | /* ARGSUSED */ | |
76 | STATIC uint | |
77 | xfs_qm_dquot_logitem_size( | |
78 | xfs_dq_logitem_t *logitem) | |
79 | { | |
80 | /* | |
81 | * we need only two iovecs, one for the format, one for the real thing | |
82 | */ | |
83 | return (2); | |
84 | } | |
85 | ||
86 | /* | |
87 | * fills in the vector of log iovecs for the given dquot log item. | |
88 | */ | |
89 | STATIC void | |
90 | xfs_qm_dquot_logitem_format( | |
91 | xfs_dq_logitem_t *logitem, | |
92 | xfs_log_iovec_t *logvec) | |
93 | { | |
94 | ASSERT(logitem); | |
95 | ASSERT(logitem->qli_dquot); | |
96 | ||
97 | logvec->i_addr = (xfs_caddr_t)&logitem->qli_format; | |
98 | logvec->i_len = sizeof(xfs_dq_logformat_t); | |
99 | logvec++; | |
100 | logvec->i_addr = (xfs_caddr_t)&logitem->qli_dquot->q_core; | |
101 | logvec->i_len = sizeof(xfs_disk_dquot_t); | |
102 | ||
103 | ASSERT(2 == logitem->qli_item.li_desc->lid_size); | |
104 | logitem->qli_format.qlf_size = 2; | |
105 | ||
106 | } | |
107 | ||
108 | /* | |
109 | * Increment the pin count of the given dquot. | |
110 | * This value is protected by pinlock spinlock in the xQM structure. | |
111 | */ | |
112 | STATIC void | |
113 | xfs_qm_dquot_logitem_pin( | |
114 | xfs_dq_logitem_t *logitem) | |
115 | { | |
116 | unsigned long s; | |
117 | xfs_dquot_t *dqp; | |
118 | ||
119 | dqp = logitem->qli_dquot; | |
120 | ASSERT(XFS_DQ_IS_LOCKED(dqp)); | |
121 | s = XFS_DQ_PINLOCK(dqp); | |
122 | dqp->q_pincount++; | |
123 | XFS_DQ_PINUNLOCK(dqp, s); | |
124 | } | |
125 | ||
126 | /* | |
127 | * Decrement the pin count of the given dquot, and wake up | |
128 | * anyone in xfs_dqwait_unpin() if the count goes to 0. The | |
129 | * dquot must have been previously pinned with a call to xfs_dqpin(). | |
130 | */ | |
131 | /* ARGSUSED */ | |
132 | STATIC void | |
133 | xfs_qm_dquot_logitem_unpin( | |
134 | xfs_dq_logitem_t *logitem, | |
135 | int stale) | |
136 | { | |
137 | unsigned long s; | |
138 | xfs_dquot_t *dqp; | |
139 | ||
140 | dqp = logitem->qli_dquot; | |
141 | ASSERT(dqp->q_pincount > 0); | |
142 | s = XFS_DQ_PINLOCK(dqp); | |
143 | dqp->q_pincount--; | |
144 | if (dqp->q_pincount == 0) { | |
145 | sv_broadcast(&dqp->q_pinwait); | |
146 | } | |
147 | XFS_DQ_PINUNLOCK(dqp, s); | |
148 | } | |
149 | ||
150 | /* ARGSUSED */ | |
151 | STATIC void | |
152 | xfs_qm_dquot_logitem_unpin_remove( | |
153 | xfs_dq_logitem_t *logitem, | |
154 | xfs_trans_t *tp) | |
155 | { | |
156 | xfs_qm_dquot_logitem_unpin(logitem, 0); | |
157 | } | |
158 | ||
159 | /* | |
160 | * Given the logitem, this writes the corresponding dquot entry to disk | |
161 | * asynchronously. This is called with the dquot entry securely locked; | |
162 | * we simply get xfs_qm_dqflush() to do the work, and unlock the dquot | |
163 | * at the end. | |
164 | */ | |
165 | STATIC void | |
166 | xfs_qm_dquot_logitem_push( | |
167 | xfs_dq_logitem_t *logitem) | |
168 | { | |
169 | xfs_dquot_t *dqp; | |
170 | ||
171 | dqp = logitem->qli_dquot; | |
172 | ||
173 | ASSERT(XFS_DQ_IS_LOCKED(dqp)); | |
174 | ASSERT(XFS_DQ_IS_FLUSH_LOCKED(dqp)); | |
175 | ||
176 | /* | |
177 | * Since we were able to lock the dquot's flush lock and | |
178 | * we found it on the AIL, the dquot must be dirty. This | |
179 | * is because the dquot is removed from the AIL while still | |
180 | * holding the flush lock in xfs_dqflush_done(). Thus, if | |
181 | * we found it in the AIL and were able to obtain the flush | |
182 | * lock without sleeping, then there must not have been | |
183 | * anyone in the process of flushing the dquot. | |
184 | */ | |
185 | xfs_qm_dqflush(dqp, XFS_B_DELWRI); | |
186 | xfs_dqunlock(dqp); | |
187 | } | |
188 | ||
189 | /*ARGSUSED*/ | |
190 | STATIC xfs_lsn_t | |
191 | xfs_qm_dquot_logitem_committed( | |
192 | xfs_dq_logitem_t *l, | |
193 | xfs_lsn_t lsn) | |
194 | { | |
195 | /* | |
196 | * We always re-log the entire dquot when it becomes dirty, | |
197 | * so, the latest copy _is_ the only one that matters. | |
198 | */ | |
199 | return (lsn); | |
200 | } | |
201 | ||
202 | ||
203 | /* | |
204 | * This is called to wait for the given dquot to be unpinned. | |
205 | * Most of these pin/unpin routines are plagiarized from inode code. | |
206 | */ | |
207 | void | |
208 | xfs_qm_dqunpin_wait( | |
209 | xfs_dquot_t *dqp) | |
210 | { | |
211 | SPLDECL(s); | |
212 | ||
213 | ASSERT(XFS_DQ_IS_LOCKED(dqp)); | |
214 | if (dqp->q_pincount == 0) { | |
215 | return; | |
216 | } | |
217 | ||
218 | /* | |
219 | * Give the log a push so we don't wait here too long. | |
220 | */ | |
221 | xfs_log_force(dqp->q_mount, (xfs_lsn_t)0, XFS_LOG_FORCE); | |
222 | s = XFS_DQ_PINLOCK(dqp); | |
223 | if (dqp->q_pincount == 0) { | |
224 | XFS_DQ_PINUNLOCK(dqp, s); | |
225 | return; | |
226 | } | |
227 | sv_wait(&(dqp->q_pinwait), PINOD, | |
228 | &(XFS_DQ_TO_QINF(dqp)->qi_pinlock), s); | |
229 | } | |
230 | ||
231 | /* | |
232 | * This is called when IOP_TRYLOCK returns XFS_ITEM_PUSHBUF to indicate that | |
233 | * the dquot is locked by us, but the flush lock isn't. So, here we are | |
234 | * going to see if the relevant dquot buffer is incore, waiting on DELWRI. | |
235 | * If so, we want to push it out to help us take this item off the AIL as soon | |
236 | * as possible. | |
237 | * | |
238 | * We must not be holding the AIL_LOCK at this point. Calling incore() to | |
239 | * search the buffercache can be a time consuming thing, and AIL_LOCK is a | |
240 | * spinlock. | |
241 | */ | |
242 | STATIC void | |
243 | xfs_qm_dquot_logitem_pushbuf( | |
244 | xfs_dq_logitem_t *qip) | |
245 | { | |
246 | xfs_dquot_t *dqp; | |
247 | xfs_mount_t *mp; | |
248 | xfs_buf_t *bp; | |
249 | uint dopush; | |
250 | ||
251 | dqp = qip->qli_dquot; | |
252 | ASSERT(XFS_DQ_IS_LOCKED(dqp)); | |
253 | ||
254 | /* | |
255 | * The qli_pushbuf_flag keeps others from | |
256 | * trying to duplicate our effort. | |
257 | */ | |
258 | ASSERT(qip->qli_pushbuf_flag != 0); | |
259 | ASSERT(qip->qli_push_owner == get_thread_id()); | |
260 | ||
261 | /* | |
262 | * If flushlock isn't locked anymore, chances are that the | |
263 | * inode flush completed and the inode was taken off the AIL. | |
264 | * So, just get out. | |
265 | */ | |
266 | if ((valusema(&(dqp->q_flock)) > 0) || | |
267 | ((qip->qli_item.li_flags & XFS_LI_IN_AIL) == 0)) { | |
268 | qip->qli_pushbuf_flag = 0; | |
269 | xfs_dqunlock(dqp); | |
270 | return; | |
271 | } | |
272 | mp = dqp->q_mount; | |
273 | bp = xfs_incore(mp->m_ddev_targp, qip->qli_format.qlf_blkno, | |
274 | XFS_QI_DQCHUNKLEN(mp), | |
275 | XFS_INCORE_TRYLOCK); | |
276 | if (bp != NULL) { | |
277 | if (XFS_BUF_ISDELAYWRITE(bp)) { | |
278 | dopush = ((qip->qli_item.li_flags & XFS_LI_IN_AIL) && | |
279 | (valusema(&(dqp->q_flock)) <= 0)); | |
280 | qip->qli_pushbuf_flag = 0; | |
281 | xfs_dqunlock(dqp); | |
282 | ||
283 | if (XFS_BUF_ISPINNED(bp)) { | |
284 | xfs_log_force(mp, (xfs_lsn_t)0, | |
285 | XFS_LOG_FORCE); | |
286 | } | |
287 | if (dopush) { | |
288 | #ifdef XFSRACEDEBUG | |
289 | delay_for_intr(); | |
290 | delay(300); | |
291 | #endif | |
292 | xfs_bawrite(mp, bp); | |
293 | } else { | |
294 | xfs_buf_relse(bp); | |
295 | } | |
296 | } else { | |
297 | qip->qli_pushbuf_flag = 0; | |
298 | xfs_dqunlock(dqp); | |
299 | xfs_buf_relse(bp); | |
300 | } | |
301 | return; | |
302 | } | |
303 | ||
304 | qip->qli_pushbuf_flag = 0; | |
305 | xfs_dqunlock(dqp); | |
306 | } | |
307 | ||
308 | /* | |
309 | * This is called to attempt to lock the dquot associated with this | |
310 | * dquot log item. Don't sleep on the dquot lock or the flush lock. | |
311 | * If the flush lock is already held, indicating that the dquot has | |
312 | * been or is in the process of being flushed, then see if we can | |
313 | * find the dquot's buffer in the buffer cache without sleeping. If | |
314 | * we can and it is marked delayed write, then we want to send it out. | |
315 | * We delay doing so until the push routine, though, to avoid sleeping | |
316 | * in any device strategy routines. | |
317 | */ | |
318 | STATIC uint | |
319 | xfs_qm_dquot_logitem_trylock( | |
320 | xfs_dq_logitem_t *qip) | |
321 | { | |
322 | xfs_dquot_t *dqp; | |
323 | uint retval; | |
324 | ||
325 | dqp = qip->qli_dquot; | |
326 | if (dqp->q_pincount > 0) | |
327 | return (XFS_ITEM_PINNED); | |
328 | ||
329 | if (! xfs_qm_dqlock_nowait(dqp)) | |
330 | return (XFS_ITEM_LOCKED); | |
331 | ||
332 | retval = XFS_ITEM_SUCCESS; | |
333 | if (! xfs_qm_dqflock_nowait(dqp)) { | |
334 | /* | |
335 | * The dquot is already being flushed. It may have been | |
336 | * flushed delayed write, however, and we don't want to | |
337 | * get stuck waiting for that to complete. So, we want to check | |
338 | * to see if we can lock the dquot's buffer without sleeping. | |
339 | * If we can and it is marked for delayed write, then we | |
340 | * hold it and send it out from the push routine. We don't | |
341 | * want to do that now since we might sleep in the device | |
342 | * strategy routine. We also don't want to grab the buffer lock | |
343 | * here because we'd like not to call into the buffer cache | |
344 | * while holding the AIL_LOCK. | |
345 | * Make sure to only return PUSHBUF if we set pushbuf_flag | |
346 | * ourselves. If someone else is doing it then we don't | |
347 | * want to go to the push routine and duplicate their efforts. | |
348 | */ | |
349 | if (qip->qli_pushbuf_flag == 0) { | |
350 | qip->qli_pushbuf_flag = 1; | |
351 | ASSERT(qip->qli_format.qlf_blkno == dqp->q_blkno); | |
352 | #ifdef DEBUG | |
353 | qip->qli_push_owner = get_thread_id(); | |
354 | #endif | |
355 | /* | |
356 | * The dquot is left locked. | |
357 | */ | |
358 | retval = XFS_ITEM_PUSHBUF; | |
359 | } else { | |
360 | retval = XFS_ITEM_FLUSHING; | |
361 | xfs_dqunlock_nonotify(dqp); | |
362 | } | |
363 | } | |
364 | ||
365 | ASSERT(qip->qli_item.li_flags & XFS_LI_IN_AIL); | |
366 | return (retval); | |
367 | } | |
368 | ||
369 | ||
370 | /* | |
371 | * Unlock the dquot associated with the log item. | |
372 | * Clear the fields of the dquot and dquot log item that | |
373 | * are specific to the current transaction. If the | |
374 | * hold flags is set, do not unlock the dquot. | |
375 | */ | |
376 | STATIC void | |
377 | xfs_qm_dquot_logitem_unlock( | |
378 | xfs_dq_logitem_t *ql) | |
379 | { | |
380 | xfs_dquot_t *dqp; | |
381 | ||
382 | ASSERT(ql != NULL); | |
383 | dqp = ql->qli_dquot; | |
384 | ASSERT(XFS_DQ_IS_LOCKED(dqp)); | |
385 | ||
386 | /* | |
387 | * Clear the transaction pointer in the dquot | |
388 | */ | |
389 | dqp->q_transp = NULL; | |
390 | ||
391 | /* | |
392 | * dquots are never 'held' from getting unlocked at the end of | |
393 | * a transaction. Their locking and unlocking is hidden inside the | |
394 | * transaction layer, within trans_commit. Hence, no LI_HOLD flag | |
395 | * for the logitem. | |
396 | */ | |
397 | xfs_dqunlock(dqp); | |
398 | } | |
399 | ||
400 | ||
401 | /* | |
402 | * The transaction with the dquot locked has aborted. The dquot | |
403 | * must not be dirty within the transaction. We simply unlock just | |
404 | * as if the transaction had been cancelled. | |
405 | */ | |
406 | STATIC void | |
407 | xfs_qm_dquot_logitem_abort( | |
408 | xfs_dq_logitem_t *ql) | |
409 | { | |
410 | xfs_qm_dquot_logitem_unlock(ql); | |
411 | } | |
412 | ||
413 | /* | |
414 | * this needs to stamp an lsn into the dquot, I think. | |
415 | * rpc's that look at user dquot's would then have to | |
416 | * push on the dependency recorded in the dquot | |
417 | */ | |
418 | /* ARGSUSED */ | |
419 | STATIC void | |
420 | xfs_qm_dquot_logitem_committing( | |
421 | xfs_dq_logitem_t *l, | |
422 | xfs_lsn_t lsn) | |
423 | { | |
424 | return; | |
425 | } | |
426 | ||
427 | ||
428 | /* | |
429 | * This is the ops vector for dquots | |
430 | */ | |
ba0f32d4 | 431 | STATIC struct xfs_item_ops xfs_dquot_item_ops = { |
1da177e4 LT |
432 | .iop_size = (uint(*)(xfs_log_item_t*))xfs_qm_dquot_logitem_size, |
433 | .iop_format = (void(*)(xfs_log_item_t*, xfs_log_iovec_t*)) | |
434 | xfs_qm_dquot_logitem_format, | |
435 | .iop_pin = (void(*)(xfs_log_item_t*))xfs_qm_dquot_logitem_pin, | |
436 | .iop_unpin = (void(*)(xfs_log_item_t*, int)) | |
437 | xfs_qm_dquot_logitem_unpin, | |
438 | .iop_unpin_remove = (void(*)(xfs_log_item_t*, xfs_trans_t*)) | |
439 | xfs_qm_dquot_logitem_unpin_remove, | |
440 | .iop_trylock = (uint(*)(xfs_log_item_t*)) | |
441 | xfs_qm_dquot_logitem_trylock, | |
442 | .iop_unlock = (void(*)(xfs_log_item_t*))xfs_qm_dquot_logitem_unlock, | |
443 | .iop_committed = (xfs_lsn_t(*)(xfs_log_item_t*, xfs_lsn_t)) | |
444 | xfs_qm_dquot_logitem_committed, | |
445 | .iop_push = (void(*)(xfs_log_item_t*))xfs_qm_dquot_logitem_push, | |
446 | .iop_abort = (void(*)(xfs_log_item_t*))xfs_qm_dquot_logitem_abort, | |
447 | .iop_pushbuf = (void(*)(xfs_log_item_t*)) | |
448 | xfs_qm_dquot_logitem_pushbuf, | |
449 | .iop_committing = (void(*)(xfs_log_item_t*, xfs_lsn_t)) | |
450 | xfs_qm_dquot_logitem_committing | |
451 | }; | |
452 | ||
453 | /* | |
454 | * Initialize the dquot log item for a newly allocated dquot. | |
455 | * The dquot isn't locked at this point, but it isn't on any of the lists | |
456 | * either, so we don't care. | |
457 | */ | |
458 | void | |
459 | xfs_qm_dquot_logitem_init( | |
460 | struct xfs_dquot *dqp) | |
461 | { | |
462 | xfs_dq_logitem_t *lp; | |
463 | lp = &dqp->q_logitem; | |
464 | ||
465 | lp->qli_item.li_type = XFS_LI_DQUOT; | |
466 | lp->qli_item.li_ops = &xfs_dquot_item_ops; | |
467 | lp->qli_item.li_mountp = dqp->q_mount; | |
468 | lp->qli_dquot = dqp; | |
469 | lp->qli_format.qlf_type = XFS_LI_DQUOT; | |
470 | lp->qli_format.qlf_id = INT_GET(dqp->q_core.d_id, ARCH_CONVERT); | |
471 | lp->qli_format.qlf_blkno = dqp->q_blkno; | |
472 | lp->qli_format.qlf_len = 1; | |
473 | /* | |
474 | * This is just the offset of this dquot within its buffer | |
475 | * (which is currently 1 FSB and probably won't change). | |
476 | * Hence 32 bits for this offset should be just fine. | |
477 | * Alternatively, we can store (bufoffset / sizeof(xfs_dqblk_t)) | |
478 | * here, and recompute it at recovery time. | |
479 | */ | |
480 | lp->qli_format.qlf_boffset = (__uint32_t)dqp->q_bufoffset; | |
481 | } | |
482 | ||
483 | /*------------------ QUOTAOFF LOG ITEMS -------------------*/ | |
484 | ||
485 | /* | |
486 | * This returns the number of iovecs needed to log the given quotaoff item. | |
487 | * We only need 1 iovec for an quotaoff item. It just logs the | |
488 | * quotaoff_log_format structure. | |
489 | */ | |
490 | /*ARGSUSED*/ | |
491 | STATIC uint | |
492 | xfs_qm_qoff_logitem_size(xfs_qoff_logitem_t *qf) | |
493 | { | |
494 | return (1); | |
495 | } | |
496 | ||
497 | /* | |
498 | * This is called to fill in the vector of log iovecs for the | |
499 | * given quotaoff log item. We use only 1 iovec, and we point that | |
500 | * at the quotaoff_log_format structure embedded in the quotaoff item. | |
501 | * It is at this point that we assert that all of the extent | |
502 | * slots in the quotaoff item have been filled. | |
503 | */ | |
504 | STATIC void | |
505 | xfs_qm_qoff_logitem_format(xfs_qoff_logitem_t *qf, | |
506 | xfs_log_iovec_t *log_vector) | |
507 | { | |
508 | ASSERT(qf->qql_format.qf_type == XFS_LI_QUOTAOFF); | |
509 | ||
510 | log_vector->i_addr = (xfs_caddr_t)&(qf->qql_format); | |
511 | log_vector->i_len = sizeof(xfs_qoff_logitem_t); | |
512 | qf->qql_format.qf_size = 1; | |
513 | } | |
514 | ||
515 | ||
516 | /* | |
517 | * Pinning has no meaning for an quotaoff item, so just return. | |
518 | */ | |
519 | /*ARGSUSED*/ | |
520 | STATIC void | |
521 | xfs_qm_qoff_logitem_pin(xfs_qoff_logitem_t *qf) | |
522 | { | |
523 | return; | |
524 | } | |
525 | ||
526 | ||
527 | /* | |
528 | * Since pinning has no meaning for an quotaoff item, unpinning does | |
529 | * not either. | |
530 | */ | |
531 | /*ARGSUSED*/ | |
532 | STATIC void | |
533 | xfs_qm_qoff_logitem_unpin(xfs_qoff_logitem_t *qf, int stale) | |
534 | { | |
535 | return; | |
536 | } | |
537 | ||
538 | /*ARGSUSED*/ | |
539 | STATIC void | |
540 | xfs_qm_qoff_logitem_unpin_remove(xfs_qoff_logitem_t *qf, xfs_trans_t *tp) | |
541 | { | |
542 | return; | |
543 | } | |
544 | ||
545 | /* | |
546 | * Quotaoff items have no locking, so just return success. | |
547 | */ | |
548 | /*ARGSUSED*/ | |
549 | STATIC uint | |
550 | xfs_qm_qoff_logitem_trylock(xfs_qoff_logitem_t *qf) | |
551 | { | |
552 | return XFS_ITEM_LOCKED; | |
553 | } | |
554 | ||
555 | /* | |
556 | * Quotaoff items have no locking or pushing, so return failure | |
557 | * so that the caller doesn't bother with us. | |
558 | */ | |
559 | /*ARGSUSED*/ | |
560 | STATIC void | |
561 | xfs_qm_qoff_logitem_unlock(xfs_qoff_logitem_t *qf) | |
562 | { | |
563 | return; | |
564 | } | |
565 | ||
566 | /* | |
567 | * The quotaoff-start-item is logged only once and cannot be moved in the log, | |
568 | * so simply return the lsn at which it's been logged. | |
569 | */ | |
570 | /*ARGSUSED*/ | |
571 | STATIC xfs_lsn_t | |
572 | xfs_qm_qoff_logitem_committed(xfs_qoff_logitem_t *qf, xfs_lsn_t lsn) | |
573 | { | |
574 | return (lsn); | |
575 | } | |
576 | ||
577 | /* | |
578 | * The transaction of which this QUOTAOFF is a part has been aborted. | |
579 | * Just clean up after ourselves. | |
580 | * Shouldn't this never happen in the case of qoffend logitems? XXX | |
581 | */ | |
582 | STATIC void | |
583 | xfs_qm_qoff_logitem_abort(xfs_qoff_logitem_t *qf) | |
584 | { | |
585 | kmem_free(qf, sizeof(xfs_qoff_logitem_t)); | |
586 | } | |
587 | ||
588 | /* | |
589 | * There isn't much you can do to push on an quotaoff item. It is simply | |
590 | * stuck waiting for the log to be flushed to disk. | |
591 | */ | |
592 | /*ARGSUSED*/ | |
593 | STATIC void | |
594 | xfs_qm_qoff_logitem_push(xfs_qoff_logitem_t *qf) | |
595 | { | |
596 | return; | |
597 | } | |
598 | ||
599 | ||
600 | /*ARGSUSED*/ | |
601 | STATIC xfs_lsn_t | |
602 | xfs_qm_qoffend_logitem_committed( | |
603 | xfs_qoff_logitem_t *qfe, | |
604 | xfs_lsn_t lsn) | |
605 | { | |
606 | xfs_qoff_logitem_t *qfs; | |
607 | SPLDECL(s); | |
608 | ||
609 | qfs = qfe->qql_start_lip; | |
610 | AIL_LOCK(qfs->qql_item.li_mountp,s); | |
611 | /* | |
612 | * Delete the qoff-start logitem from the AIL. | |
613 | * xfs_trans_delete_ail() drops the AIL lock. | |
614 | */ | |
615 | xfs_trans_delete_ail(qfs->qql_item.li_mountp, (xfs_log_item_t *)qfs, s); | |
616 | kmem_free(qfs, sizeof(xfs_qoff_logitem_t)); | |
617 | kmem_free(qfe, sizeof(xfs_qoff_logitem_t)); | |
618 | return (xfs_lsn_t)-1; | |
619 | } | |
620 | ||
621 | /* | |
622 | * XXX rcc - don't know quite what to do with this. I think we can | |
623 | * just ignore it. The only time that isn't the case is if we allow | |
624 | * the client to somehow see that quotas have been turned off in which | |
625 | * we can't allow that to get back until the quotaoff hits the disk. | |
626 | * So how would that happen? Also, do we need different routines for | |
627 | * quotaoff start and quotaoff end? I suspect the answer is yes but | |
628 | * to be sure, I need to look at the recovery code and see how quota off | |
629 | * recovery is handled (do we roll forward or back or do something else). | |
630 | * If we roll forwards or backwards, then we need two separate routines, | |
631 | * one that does nothing and one that stamps in the lsn that matters | |
632 | * (truly makes the quotaoff irrevocable). If we do something else, | |
633 | * then maybe we don't need two. | |
634 | */ | |
635 | /* ARGSUSED */ | |
636 | STATIC void | |
637 | xfs_qm_qoff_logitem_committing(xfs_qoff_logitem_t *qip, xfs_lsn_t commit_lsn) | |
638 | { | |
639 | return; | |
640 | } | |
641 | ||
642 | /* ARGSUSED */ | |
643 | STATIC void | |
644 | xfs_qm_qoffend_logitem_committing(xfs_qoff_logitem_t *qip, xfs_lsn_t commit_lsn) | |
645 | { | |
646 | return; | |
647 | } | |
648 | ||
ba0f32d4 | 649 | STATIC struct xfs_item_ops xfs_qm_qoffend_logitem_ops = { |
1da177e4 LT |
650 | .iop_size = (uint(*)(xfs_log_item_t*))xfs_qm_qoff_logitem_size, |
651 | .iop_format = (void(*)(xfs_log_item_t*, xfs_log_iovec_t*)) | |
652 | xfs_qm_qoff_logitem_format, | |
653 | .iop_pin = (void(*)(xfs_log_item_t*))xfs_qm_qoff_logitem_pin, | |
654 | .iop_unpin = (void(*)(xfs_log_item_t* ,int)) | |
655 | xfs_qm_qoff_logitem_unpin, | |
656 | .iop_unpin_remove = (void(*)(xfs_log_item_t*,xfs_trans_t*)) | |
657 | xfs_qm_qoff_logitem_unpin_remove, | |
658 | .iop_trylock = (uint(*)(xfs_log_item_t*))xfs_qm_qoff_logitem_trylock, | |
659 | .iop_unlock = (void(*)(xfs_log_item_t*))xfs_qm_qoff_logitem_unlock, | |
660 | .iop_committed = (xfs_lsn_t(*)(xfs_log_item_t*, xfs_lsn_t)) | |
661 | xfs_qm_qoffend_logitem_committed, | |
662 | .iop_push = (void(*)(xfs_log_item_t*))xfs_qm_qoff_logitem_push, | |
663 | .iop_abort = (void(*)(xfs_log_item_t*))xfs_qm_qoff_logitem_abort, | |
664 | .iop_pushbuf = NULL, | |
665 | .iop_committing = (void(*)(xfs_log_item_t*, xfs_lsn_t)) | |
666 | xfs_qm_qoffend_logitem_committing | |
667 | }; | |
668 | ||
669 | /* | |
670 | * This is the ops vector shared by all quotaoff-start log items. | |
671 | */ | |
ba0f32d4 | 672 | STATIC struct xfs_item_ops xfs_qm_qoff_logitem_ops = { |
1da177e4 LT |
673 | .iop_size = (uint(*)(xfs_log_item_t*))xfs_qm_qoff_logitem_size, |
674 | .iop_format = (void(*)(xfs_log_item_t*, xfs_log_iovec_t*)) | |
675 | xfs_qm_qoff_logitem_format, | |
676 | .iop_pin = (void(*)(xfs_log_item_t*))xfs_qm_qoff_logitem_pin, | |
677 | .iop_unpin = (void(*)(xfs_log_item_t*, int)) | |
678 | xfs_qm_qoff_logitem_unpin, | |
679 | .iop_unpin_remove = (void(*)(xfs_log_item_t*,xfs_trans_t*)) | |
680 | xfs_qm_qoff_logitem_unpin_remove, | |
681 | .iop_trylock = (uint(*)(xfs_log_item_t*))xfs_qm_qoff_logitem_trylock, | |
682 | .iop_unlock = (void(*)(xfs_log_item_t*))xfs_qm_qoff_logitem_unlock, | |
683 | .iop_committed = (xfs_lsn_t(*)(xfs_log_item_t*, xfs_lsn_t)) | |
684 | xfs_qm_qoff_logitem_committed, | |
685 | .iop_push = (void(*)(xfs_log_item_t*))xfs_qm_qoff_logitem_push, | |
686 | .iop_abort = (void(*)(xfs_log_item_t*))xfs_qm_qoff_logitem_abort, | |
687 | .iop_pushbuf = NULL, | |
688 | .iop_committing = (void(*)(xfs_log_item_t*, xfs_lsn_t)) | |
689 | xfs_qm_qoff_logitem_committing | |
690 | }; | |
691 | ||
692 | /* | |
693 | * Allocate and initialize an quotaoff item of the correct quota type(s). | |
694 | */ | |
695 | xfs_qoff_logitem_t * | |
696 | xfs_qm_qoff_logitem_init( | |
697 | struct xfs_mount *mp, | |
698 | xfs_qoff_logitem_t *start, | |
699 | uint flags) | |
700 | { | |
701 | xfs_qoff_logitem_t *qf; | |
702 | ||
703 | qf = (xfs_qoff_logitem_t*) kmem_zalloc(sizeof(xfs_qoff_logitem_t), KM_SLEEP); | |
704 | ||
705 | qf->qql_item.li_type = XFS_LI_QUOTAOFF; | |
706 | if (start) | |
707 | qf->qql_item.li_ops = &xfs_qm_qoffend_logitem_ops; | |
708 | else | |
709 | qf->qql_item.li_ops = &xfs_qm_qoff_logitem_ops; | |
710 | qf->qql_item.li_mountp = mp; | |
711 | qf->qql_format.qf_type = XFS_LI_QUOTAOFF; | |
712 | qf->qql_format.qf_flags = flags; | |
713 | qf->qql_start_lip = start; | |
714 | return (qf); | |
715 | } |