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1da177e4 | 1 | /* |
4ce3121f NS |
2 | * Copyright (c) 2000-2003 Silicon Graphics, Inc. |
3 | * All Rights Reserved. | |
1da177e4 | 4 | * |
4ce3121f NS |
5 | * This program is free software; you can redistribute it and/or |
6 | * modify it under the terms of the GNU General Public License as | |
1da177e4 LT |
7 | * published by the Free Software Foundation. |
8 | * | |
4ce3121f NS |
9 | * This program is distributed in the hope that it would be useful, |
10 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
12 | * GNU General Public License for more details. | |
1da177e4 | 13 | * |
4ce3121f NS |
14 | * You should have received a copy of the GNU General Public License |
15 | * along with this program; if not, write the Free Software Foundation, | |
16 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA | |
1da177e4 | 17 | */ |
1da177e4 LT |
18 | #include "xfs.h" |
19 | #include "xfs_fs.h" | |
a844f451 | 20 | #include "xfs_bit.h" |
1da177e4 | 21 | #include "xfs_log.h" |
a844f451 | 22 | #include "xfs_inum.h" |
1da177e4 LT |
23 | #include "xfs_trans.h" |
24 | #include "xfs_sb.h" | |
25 | #include "xfs_ag.h" | |
26 | #include "xfs_dir.h" | |
27 | #include "xfs_dir2.h" | |
28 | #include "xfs_alloc.h" | |
29 | #include "xfs_dmapi.h" | |
30 | #include "xfs_quota.h" | |
31 | #include "xfs_mount.h" | |
1da177e4 | 32 | #include "xfs_bmap_btree.h" |
a844f451 | 33 | #include "xfs_alloc_btree.h" |
1da177e4 | 34 | #include "xfs_ialloc_btree.h" |
1da177e4 LT |
35 | #include "xfs_dir_sf.h" |
36 | #include "xfs_dir2_sf.h" | |
a844f451 | 37 | #include "xfs_attr_sf.h" |
1da177e4 LT |
38 | #include "xfs_dinode.h" |
39 | #include "xfs_inode.h" | |
40 | #include "xfs_bmap.h" | |
a844f451 NS |
41 | #include "xfs_btree.h" |
42 | #include "xfs_ialloc.h" | |
1da177e4 LT |
43 | #include "xfs_rtalloc.h" |
44 | #include "xfs_error.h" | |
45 | #include "xfs_itable.h" | |
46 | #include "xfs_rw.h" | |
47 | #include "xfs_acl.h" | |
48 | #include "xfs_cap.h" | |
49 | #include "xfs_mac.h" | |
50 | #include "xfs_attr.h" | |
51 | #include "xfs_buf_item.h" | |
52 | #include "xfs_trans_priv.h" | |
1da177e4 LT |
53 | #include "xfs_qm.h" |
54 | ||
1da177e4 LT |
55 | /* |
56 | * returns the number of iovecs needed to log the given dquot item. | |
57 | */ | |
58 | /* ARGSUSED */ | |
59 | STATIC uint | |
60 | xfs_qm_dquot_logitem_size( | |
61 | xfs_dq_logitem_t *logitem) | |
62 | { | |
63 | /* | |
64 | * we need only two iovecs, one for the format, one for the real thing | |
65 | */ | |
66 | return (2); | |
67 | } | |
68 | ||
69 | /* | |
70 | * fills in the vector of log iovecs for the given dquot log item. | |
71 | */ | |
72 | STATIC void | |
73 | xfs_qm_dquot_logitem_format( | |
74 | xfs_dq_logitem_t *logitem, | |
75 | xfs_log_iovec_t *logvec) | |
76 | { | |
77 | ASSERT(logitem); | |
78 | ASSERT(logitem->qli_dquot); | |
79 | ||
80 | logvec->i_addr = (xfs_caddr_t)&logitem->qli_format; | |
81 | logvec->i_len = sizeof(xfs_dq_logformat_t); | |
82 | logvec++; | |
83 | logvec->i_addr = (xfs_caddr_t)&logitem->qli_dquot->q_core; | |
84 | logvec->i_len = sizeof(xfs_disk_dquot_t); | |
85 | ||
86 | ASSERT(2 == logitem->qli_item.li_desc->lid_size); | |
87 | logitem->qli_format.qlf_size = 2; | |
88 | ||
89 | } | |
90 | ||
91 | /* | |
92 | * Increment the pin count of the given dquot. | |
93 | * This value is protected by pinlock spinlock in the xQM structure. | |
94 | */ | |
95 | STATIC void | |
96 | xfs_qm_dquot_logitem_pin( | |
97 | xfs_dq_logitem_t *logitem) | |
98 | { | |
99 | unsigned long s; | |
100 | xfs_dquot_t *dqp; | |
101 | ||
102 | dqp = logitem->qli_dquot; | |
103 | ASSERT(XFS_DQ_IS_LOCKED(dqp)); | |
104 | s = XFS_DQ_PINLOCK(dqp); | |
105 | dqp->q_pincount++; | |
106 | XFS_DQ_PINUNLOCK(dqp, s); | |
107 | } | |
108 | ||
109 | /* | |
110 | * Decrement the pin count of the given dquot, and wake up | |
111 | * anyone in xfs_dqwait_unpin() if the count goes to 0. The | |
112 | * dquot must have been previously pinned with a call to xfs_dqpin(). | |
113 | */ | |
114 | /* ARGSUSED */ | |
115 | STATIC void | |
116 | xfs_qm_dquot_logitem_unpin( | |
117 | xfs_dq_logitem_t *logitem, | |
118 | int stale) | |
119 | { | |
120 | unsigned long s; | |
121 | xfs_dquot_t *dqp; | |
122 | ||
123 | dqp = logitem->qli_dquot; | |
124 | ASSERT(dqp->q_pincount > 0); | |
125 | s = XFS_DQ_PINLOCK(dqp); | |
126 | dqp->q_pincount--; | |
127 | if (dqp->q_pincount == 0) { | |
128 | sv_broadcast(&dqp->q_pinwait); | |
129 | } | |
130 | XFS_DQ_PINUNLOCK(dqp, s); | |
131 | } | |
132 | ||
133 | /* ARGSUSED */ | |
134 | STATIC void | |
135 | xfs_qm_dquot_logitem_unpin_remove( | |
136 | xfs_dq_logitem_t *logitem, | |
137 | xfs_trans_t *tp) | |
138 | { | |
139 | xfs_qm_dquot_logitem_unpin(logitem, 0); | |
140 | } | |
141 | ||
142 | /* | |
143 | * Given the logitem, this writes the corresponding dquot entry to disk | |
144 | * asynchronously. This is called with the dquot entry securely locked; | |
145 | * we simply get xfs_qm_dqflush() to do the work, and unlock the dquot | |
146 | * at the end. | |
147 | */ | |
148 | STATIC void | |
149 | xfs_qm_dquot_logitem_push( | |
150 | xfs_dq_logitem_t *logitem) | |
151 | { | |
152 | xfs_dquot_t *dqp; | |
153 | ||
154 | dqp = logitem->qli_dquot; | |
155 | ||
156 | ASSERT(XFS_DQ_IS_LOCKED(dqp)); | |
157 | ASSERT(XFS_DQ_IS_FLUSH_LOCKED(dqp)); | |
158 | ||
159 | /* | |
160 | * Since we were able to lock the dquot's flush lock and | |
161 | * we found it on the AIL, the dquot must be dirty. This | |
162 | * is because the dquot is removed from the AIL while still | |
163 | * holding the flush lock in xfs_dqflush_done(). Thus, if | |
164 | * we found it in the AIL and were able to obtain the flush | |
165 | * lock without sleeping, then there must not have been | |
166 | * anyone in the process of flushing the dquot. | |
167 | */ | |
168 | xfs_qm_dqflush(dqp, XFS_B_DELWRI); | |
169 | xfs_dqunlock(dqp); | |
170 | } | |
171 | ||
172 | /*ARGSUSED*/ | |
173 | STATIC xfs_lsn_t | |
174 | xfs_qm_dquot_logitem_committed( | |
175 | xfs_dq_logitem_t *l, | |
176 | xfs_lsn_t lsn) | |
177 | { | |
178 | /* | |
179 | * We always re-log the entire dquot when it becomes dirty, | |
180 | * so, the latest copy _is_ the only one that matters. | |
181 | */ | |
182 | return (lsn); | |
183 | } | |
184 | ||
185 | ||
186 | /* | |
187 | * This is called to wait for the given dquot to be unpinned. | |
188 | * Most of these pin/unpin routines are plagiarized from inode code. | |
189 | */ | |
190 | void | |
191 | xfs_qm_dqunpin_wait( | |
192 | xfs_dquot_t *dqp) | |
193 | { | |
194 | SPLDECL(s); | |
195 | ||
196 | ASSERT(XFS_DQ_IS_LOCKED(dqp)); | |
197 | if (dqp->q_pincount == 0) { | |
198 | return; | |
199 | } | |
200 | ||
201 | /* | |
202 | * Give the log a push so we don't wait here too long. | |
203 | */ | |
204 | xfs_log_force(dqp->q_mount, (xfs_lsn_t)0, XFS_LOG_FORCE); | |
205 | s = XFS_DQ_PINLOCK(dqp); | |
206 | if (dqp->q_pincount == 0) { | |
207 | XFS_DQ_PINUNLOCK(dqp, s); | |
208 | return; | |
209 | } | |
210 | sv_wait(&(dqp->q_pinwait), PINOD, | |
211 | &(XFS_DQ_TO_QINF(dqp)->qi_pinlock), s); | |
212 | } | |
213 | ||
214 | /* | |
215 | * This is called when IOP_TRYLOCK returns XFS_ITEM_PUSHBUF to indicate that | |
216 | * the dquot is locked by us, but the flush lock isn't. So, here we are | |
217 | * going to see if the relevant dquot buffer is incore, waiting on DELWRI. | |
218 | * If so, we want to push it out to help us take this item off the AIL as soon | |
219 | * as possible. | |
220 | * | |
221 | * We must not be holding the AIL_LOCK at this point. Calling incore() to | |
222 | * search the buffercache can be a time consuming thing, and AIL_LOCK is a | |
223 | * spinlock. | |
224 | */ | |
225 | STATIC void | |
226 | xfs_qm_dquot_logitem_pushbuf( | |
227 | xfs_dq_logitem_t *qip) | |
228 | { | |
229 | xfs_dquot_t *dqp; | |
230 | xfs_mount_t *mp; | |
231 | xfs_buf_t *bp; | |
232 | uint dopush; | |
233 | ||
234 | dqp = qip->qli_dquot; | |
235 | ASSERT(XFS_DQ_IS_LOCKED(dqp)); | |
236 | ||
237 | /* | |
238 | * The qli_pushbuf_flag keeps others from | |
239 | * trying to duplicate our effort. | |
240 | */ | |
241 | ASSERT(qip->qli_pushbuf_flag != 0); | |
242 | ASSERT(qip->qli_push_owner == get_thread_id()); | |
243 | ||
244 | /* | |
245 | * If flushlock isn't locked anymore, chances are that the | |
246 | * inode flush completed and the inode was taken off the AIL. | |
247 | * So, just get out. | |
248 | */ | |
249 | if ((valusema(&(dqp->q_flock)) > 0) || | |
250 | ((qip->qli_item.li_flags & XFS_LI_IN_AIL) == 0)) { | |
251 | qip->qli_pushbuf_flag = 0; | |
252 | xfs_dqunlock(dqp); | |
253 | return; | |
254 | } | |
255 | mp = dqp->q_mount; | |
256 | bp = xfs_incore(mp->m_ddev_targp, qip->qli_format.qlf_blkno, | |
257 | XFS_QI_DQCHUNKLEN(mp), | |
258 | XFS_INCORE_TRYLOCK); | |
259 | if (bp != NULL) { | |
260 | if (XFS_BUF_ISDELAYWRITE(bp)) { | |
261 | dopush = ((qip->qli_item.li_flags & XFS_LI_IN_AIL) && | |
262 | (valusema(&(dqp->q_flock)) <= 0)); | |
263 | qip->qli_pushbuf_flag = 0; | |
264 | xfs_dqunlock(dqp); | |
265 | ||
266 | if (XFS_BUF_ISPINNED(bp)) { | |
267 | xfs_log_force(mp, (xfs_lsn_t)0, | |
268 | XFS_LOG_FORCE); | |
269 | } | |
270 | if (dopush) { | |
271 | #ifdef XFSRACEDEBUG | |
272 | delay_for_intr(); | |
273 | delay(300); | |
274 | #endif | |
275 | xfs_bawrite(mp, bp); | |
276 | } else { | |
277 | xfs_buf_relse(bp); | |
278 | } | |
279 | } else { | |
280 | qip->qli_pushbuf_flag = 0; | |
281 | xfs_dqunlock(dqp); | |
282 | xfs_buf_relse(bp); | |
283 | } | |
284 | return; | |
285 | } | |
286 | ||
287 | qip->qli_pushbuf_flag = 0; | |
288 | xfs_dqunlock(dqp); | |
289 | } | |
290 | ||
291 | /* | |
292 | * This is called to attempt to lock the dquot associated with this | |
293 | * dquot log item. Don't sleep on the dquot lock or the flush lock. | |
294 | * If the flush lock is already held, indicating that the dquot has | |
295 | * been or is in the process of being flushed, then see if we can | |
296 | * find the dquot's buffer in the buffer cache without sleeping. If | |
297 | * we can and it is marked delayed write, then we want to send it out. | |
298 | * We delay doing so until the push routine, though, to avoid sleeping | |
299 | * in any device strategy routines. | |
300 | */ | |
301 | STATIC uint | |
302 | xfs_qm_dquot_logitem_trylock( | |
303 | xfs_dq_logitem_t *qip) | |
304 | { | |
305 | xfs_dquot_t *dqp; | |
306 | uint retval; | |
307 | ||
308 | dqp = qip->qli_dquot; | |
309 | if (dqp->q_pincount > 0) | |
310 | return (XFS_ITEM_PINNED); | |
311 | ||
312 | if (! xfs_qm_dqlock_nowait(dqp)) | |
313 | return (XFS_ITEM_LOCKED); | |
314 | ||
315 | retval = XFS_ITEM_SUCCESS; | |
316 | if (! xfs_qm_dqflock_nowait(dqp)) { | |
317 | /* | |
318 | * The dquot is already being flushed. It may have been | |
319 | * flushed delayed write, however, and we don't want to | |
320 | * get stuck waiting for that to complete. So, we want to check | |
321 | * to see if we can lock the dquot's buffer without sleeping. | |
322 | * If we can and it is marked for delayed write, then we | |
323 | * hold it and send it out from the push routine. We don't | |
324 | * want to do that now since we might sleep in the device | |
325 | * strategy routine. We also don't want to grab the buffer lock | |
326 | * here because we'd like not to call into the buffer cache | |
327 | * while holding the AIL_LOCK. | |
328 | * Make sure to only return PUSHBUF if we set pushbuf_flag | |
329 | * ourselves. If someone else is doing it then we don't | |
330 | * want to go to the push routine and duplicate their efforts. | |
331 | */ | |
332 | if (qip->qli_pushbuf_flag == 0) { | |
333 | qip->qli_pushbuf_flag = 1; | |
334 | ASSERT(qip->qli_format.qlf_blkno == dqp->q_blkno); | |
335 | #ifdef DEBUG | |
336 | qip->qli_push_owner = get_thread_id(); | |
337 | #endif | |
338 | /* | |
339 | * The dquot is left locked. | |
340 | */ | |
341 | retval = XFS_ITEM_PUSHBUF; | |
342 | } else { | |
343 | retval = XFS_ITEM_FLUSHING; | |
344 | xfs_dqunlock_nonotify(dqp); | |
345 | } | |
346 | } | |
347 | ||
348 | ASSERT(qip->qli_item.li_flags & XFS_LI_IN_AIL); | |
349 | return (retval); | |
350 | } | |
351 | ||
352 | ||
353 | /* | |
354 | * Unlock the dquot associated with the log item. | |
355 | * Clear the fields of the dquot and dquot log item that | |
356 | * are specific to the current transaction. If the | |
357 | * hold flags is set, do not unlock the dquot. | |
358 | */ | |
359 | STATIC void | |
360 | xfs_qm_dquot_logitem_unlock( | |
361 | xfs_dq_logitem_t *ql) | |
362 | { | |
363 | xfs_dquot_t *dqp; | |
364 | ||
365 | ASSERT(ql != NULL); | |
366 | dqp = ql->qli_dquot; | |
367 | ASSERT(XFS_DQ_IS_LOCKED(dqp)); | |
368 | ||
369 | /* | |
370 | * Clear the transaction pointer in the dquot | |
371 | */ | |
372 | dqp->q_transp = NULL; | |
373 | ||
374 | /* | |
375 | * dquots are never 'held' from getting unlocked at the end of | |
376 | * a transaction. Their locking and unlocking is hidden inside the | |
377 | * transaction layer, within trans_commit. Hence, no LI_HOLD flag | |
378 | * for the logitem. | |
379 | */ | |
380 | xfs_dqunlock(dqp); | |
381 | } | |
382 | ||
383 | ||
384 | /* | |
385 | * The transaction with the dquot locked has aborted. The dquot | |
386 | * must not be dirty within the transaction. We simply unlock just | |
387 | * as if the transaction had been cancelled. | |
388 | */ | |
389 | STATIC void | |
390 | xfs_qm_dquot_logitem_abort( | |
391 | xfs_dq_logitem_t *ql) | |
392 | { | |
393 | xfs_qm_dquot_logitem_unlock(ql); | |
394 | } | |
395 | ||
396 | /* | |
397 | * this needs to stamp an lsn into the dquot, I think. | |
398 | * rpc's that look at user dquot's would then have to | |
399 | * push on the dependency recorded in the dquot | |
400 | */ | |
401 | /* ARGSUSED */ | |
402 | STATIC void | |
403 | xfs_qm_dquot_logitem_committing( | |
404 | xfs_dq_logitem_t *l, | |
405 | xfs_lsn_t lsn) | |
406 | { | |
407 | return; | |
408 | } | |
409 | ||
410 | ||
411 | /* | |
412 | * This is the ops vector for dquots | |
413 | */ | |
ba0f32d4 | 414 | STATIC struct xfs_item_ops xfs_dquot_item_ops = { |
1da177e4 LT |
415 | .iop_size = (uint(*)(xfs_log_item_t*))xfs_qm_dquot_logitem_size, |
416 | .iop_format = (void(*)(xfs_log_item_t*, xfs_log_iovec_t*)) | |
417 | xfs_qm_dquot_logitem_format, | |
418 | .iop_pin = (void(*)(xfs_log_item_t*))xfs_qm_dquot_logitem_pin, | |
419 | .iop_unpin = (void(*)(xfs_log_item_t*, int)) | |
420 | xfs_qm_dquot_logitem_unpin, | |
421 | .iop_unpin_remove = (void(*)(xfs_log_item_t*, xfs_trans_t*)) | |
422 | xfs_qm_dquot_logitem_unpin_remove, | |
423 | .iop_trylock = (uint(*)(xfs_log_item_t*)) | |
424 | xfs_qm_dquot_logitem_trylock, | |
425 | .iop_unlock = (void(*)(xfs_log_item_t*))xfs_qm_dquot_logitem_unlock, | |
426 | .iop_committed = (xfs_lsn_t(*)(xfs_log_item_t*, xfs_lsn_t)) | |
427 | xfs_qm_dquot_logitem_committed, | |
428 | .iop_push = (void(*)(xfs_log_item_t*))xfs_qm_dquot_logitem_push, | |
429 | .iop_abort = (void(*)(xfs_log_item_t*))xfs_qm_dquot_logitem_abort, | |
430 | .iop_pushbuf = (void(*)(xfs_log_item_t*)) | |
431 | xfs_qm_dquot_logitem_pushbuf, | |
432 | .iop_committing = (void(*)(xfs_log_item_t*, xfs_lsn_t)) | |
433 | xfs_qm_dquot_logitem_committing | |
434 | }; | |
435 | ||
436 | /* | |
437 | * Initialize the dquot log item for a newly allocated dquot. | |
438 | * The dquot isn't locked at this point, but it isn't on any of the lists | |
439 | * either, so we don't care. | |
440 | */ | |
441 | void | |
442 | xfs_qm_dquot_logitem_init( | |
443 | struct xfs_dquot *dqp) | |
444 | { | |
445 | xfs_dq_logitem_t *lp; | |
446 | lp = &dqp->q_logitem; | |
447 | ||
448 | lp->qli_item.li_type = XFS_LI_DQUOT; | |
449 | lp->qli_item.li_ops = &xfs_dquot_item_ops; | |
450 | lp->qli_item.li_mountp = dqp->q_mount; | |
451 | lp->qli_dquot = dqp; | |
452 | lp->qli_format.qlf_type = XFS_LI_DQUOT; | |
453 | lp->qli_format.qlf_id = INT_GET(dqp->q_core.d_id, ARCH_CONVERT); | |
454 | lp->qli_format.qlf_blkno = dqp->q_blkno; | |
455 | lp->qli_format.qlf_len = 1; | |
456 | /* | |
457 | * This is just the offset of this dquot within its buffer | |
458 | * (which is currently 1 FSB and probably won't change). | |
459 | * Hence 32 bits for this offset should be just fine. | |
460 | * Alternatively, we can store (bufoffset / sizeof(xfs_dqblk_t)) | |
461 | * here, and recompute it at recovery time. | |
462 | */ | |
463 | lp->qli_format.qlf_boffset = (__uint32_t)dqp->q_bufoffset; | |
464 | } | |
465 | ||
466 | /*------------------ QUOTAOFF LOG ITEMS -------------------*/ | |
467 | ||
468 | /* | |
469 | * This returns the number of iovecs needed to log the given quotaoff item. | |
470 | * We only need 1 iovec for an quotaoff item. It just logs the | |
471 | * quotaoff_log_format structure. | |
472 | */ | |
473 | /*ARGSUSED*/ | |
474 | STATIC uint | |
475 | xfs_qm_qoff_logitem_size(xfs_qoff_logitem_t *qf) | |
476 | { | |
477 | return (1); | |
478 | } | |
479 | ||
480 | /* | |
481 | * This is called to fill in the vector of log iovecs for the | |
482 | * given quotaoff log item. We use only 1 iovec, and we point that | |
483 | * at the quotaoff_log_format structure embedded in the quotaoff item. | |
484 | * It is at this point that we assert that all of the extent | |
485 | * slots in the quotaoff item have been filled. | |
486 | */ | |
487 | STATIC void | |
488 | xfs_qm_qoff_logitem_format(xfs_qoff_logitem_t *qf, | |
489 | xfs_log_iovec_t *log_vector) | |
490 | { | |
491 | ASSERT(qf->qql_format.qf_type == XFS_LI_QUOTAOFF); | |
492 | ||
493 | log_vector->i_addr = (xfs_caddr_t)&(qf->qql_format); | |
494 | log_vector->i_len = sizeof(xfs_qoff_logitem_t); | |
7e9c6396 | 495 | XLOG_VEC_SET_TYPE(log_vector, XLOG_REG_TYPE_QUOTAOFF); |
1da177e4 LT |
496 | qf->qql_format.qf_size = 1; |
497 | } | |
498 | ||
499 | ||
500 | /* | |
501 | * Pinning has no meaning for an quotaoff item, so just return. | |
502 | */ | |
503 | /*ARGSUSED*/ | |
504 | STATIC void | |
505 | xfs_qm_qoff_logitem_pin(xfs_qoff_logitem_t *qf) | |
506 | { | |
507 | return; | |
508 | } | |
509 | ||
510 | ||
511 | /* | |
512 | * Since pinning has no meaning for an quotaoff item, unpinning does | |
513 | * not either. | |
514 | */ | |
515 | /*ARGSUSED*/ | |
516 | STATIC void | |
517 | xfs_qm_qoff_logitem_unpin(xfs_qoff_logitem_t *qf, int stale) | |
518 | { | |
519 | return; | |
520 | } | |
521 | ||
522 | /*ARGSUSED*/ | |
523 | STATIC void | |
524 | xfs_qm_qoff_logitem_unpin_remove(xfs_qoff_logitem_t *qf, xfs_trans_t *tp) | |
525 | { | |
526 | return; | |
527 | } | |
528 | ||
529 | /* | |
530 | * Quotaoff items have no locking, so just return success. | |
531 | */ | |
532 | /*ARGSUSED*/ | |
533 | STATIC uint | |
534 | xfs_qm_qoff_logitem_trylock(xfs_qoff_logitem_t *qf) | |
535 | { | |
536 | return XFS_ITEM_LOCKED; | |
537 | } | |
538 | ||
539 | /* | |
540 | * Quotaoff items have no locking or pushing, so return failure | |
541 | * so that the caller doesn't bother with us. | |
542 | */ | |
543 | /*ARGSUSED*/ | |
544 | STATIC void | |
545 | xfs_qm_qoff_logitem_unlock(xfs_qoff_logitem_t *qf) | |
546 | { | |
547 | return; | |
548 | } | |
549 | ||
550 | /* | |
551 | * The quotaoff-start-item is logged only once and cannot be moved in the log, | |
552 | * so simply return the lsn at which it's been logged. | |
553 | */ | |
554 | /*ARGSUSED*/ | |
555 | STATIC xfs_lsn_t | |
556 | xfs_qm_qoff_logitem_committed(xfs_qoff_logitem_t *qf, xfs_lsn_t lsn) | |
557 | { | |
558 | return (lsn); | |
559 | } | |
560 | ||
561 | /* | |
562 | * The transaction of which this QUOTAOFF is a part has been aborted. | |
563 | * Just clean up after ourselves. | |
564 | * Shouldn't this never happen in the case of qoffend logitems? XXX | |
565 | */ | |
566 | STATIC void | |
567 | xfs_qm_qoff_logitem_abort(xfs_qoff_logitem_t *qf) | |
568 | { | |
569 | kmem_free(qf, sizeof(xfs_qoff_logitem_t)); | |
570 | } | |
571 | ||
572 | /* | |
573 | * There isn't much you can do to push on an quotaoff item. It is simply | |
574 | * stuck waiting for the log to be flushed to disk. | |
575 | */ | |
576 | /*ARGSUSED*/ | |
577 | STATIC void | |
578 | xfs_qm_qoff_logitem_push(xfs_qoff_logitem_t *qf) | |
579 | { | |
580 | return; | |
581 | } | |
582 | ||
583 | ||
584 | /*ARGSUSED*/ | |
585 | STATIC xfs_lsn_t | |
586 | xfs_qm_qoffend_logitem_committed( | |
587 | xfs_qoff_logitem_t *qfe, | |
588 | xfs_lsn_t lsn) | |
589 | { | |
590 | xfs_qoff_logitem_t *qfs; | |
591 | SPLDECL(s); | |
592 | ||
593 | qfs = qfe->qql_start_lip; | |
594 | AIL_LOCK(qfs->qql_item.li_mountp,s); | |
595 | /* | |
596 | * Delete the qoff-start logitem from the AIL. | |
597 | * xfs_trans_delete_ail() drops the AIL lock. | |
598 | */ | |
599 | xfs_trans_delete_ail(qfs->qql_item.li_mountp, (xfs_log_item_t *)qfs, s); | |
600 | kmem_free(qfs, sizeof(xfs_qoff_logitem_t)); | |
601 | kmem_free(qfe, sizeof(xfs_qoff_logitem_t)); | |
602 | return (xfs_lsn_t)-1; | |
603 | } | |
604 | ||
605 | /* | |
606 | * XXX rcc - don't know quite what to do with this. I think we can | |
607 | * just ignore it. The only time that isn't the case is if we allow | |
608 | * the client to somehow see that quotas have been turned off in which | |
609 | * we can't allow that to get back until the quotaoff hits the disk. | |
610 | * So how would that happen? Also, do we need different routines for | |
611 | * quotaoff start and quotaoff end? I suspect the answer is yes but | |
612 | * to be sure, I need to look at the recovery code and see how quota off | |
613 | * recovery is handled (do we roll forward or back or do something else). | |
614 | * If we roll forwards or backwards, then we need two separate routines, | |
615 | * one that does nothing and one that stamps in the lsn that matters | |
616 | * (truly makes the quotaoff irrevocable). If we do something else, | |
617 | * then maybe we don't need two. | |
618 | */ | |
619 | /* ARGSUSED */ | |
620 | STATIC void | |
621 | xfs_qm_qoff_logitem_committing(xfs_qoff_logitem_t *qip, xfs_lsn_t commit_lsn) | |
622 | { | |
623 | return; | |
624 | } | |
625 | ||
626 | /* ARGSUSED */ | |
627 | STATIC void | |
628 | xfs_qm_qoffend_logitem_committing(xfs_qoff_logitem_t *qip, xfs_lsn_t commit_lsn) | |
629 | { | |
630 | return; | |
631 | } | |
632 | ||
ba0f32d4 | 633 | STATIC struct xfs_item_ops xfs_qm_qoffend_logitem_ops = { |
1da177e4 LT |
634 | .iop_size = (uint(*)(xfs_log_item_t*))xfs_qm_qoff_logitem_size, |
635 | .iop_format = (void(*)(xfs_log_item_t*, xfs_log_iovec_t*)) | |
636 | xfs_qm_qoff_logitem_format, | |
637 | .iop_pin = (void(*)(xfs_log_item_t*))xfs_qm_qoff_logitem_pin, | |
638 | .iop_unpin = (void(*)(xfs_log_item_t* ,int)) | |
639 | xfs_qm_qoff_logitem_unpin, | |
640 | .iop_unpin_remove = (void(*)(xfs_log_item_t*,xfs_trans_t*)) | |
641 | xfs_qm_qoff_logitem_unpin_remove, | |
642 | .iop_trylock = (uint(*)(xfs_log_item_t*))xfs_qm_qoff_logitem_trylock, | |
643 | .iop_unlock = (void(*)(xfs_log_item_t*))xfs_qm_qoff_logitem_unlock, | |
644 | .iop_committed = (xfs_lsn_t(*)(xfs_log_item_t*, xfs_lsn_t)) | |
645 | xfs_qm_qoffend_logitem_committed, | |
646 | .iop_push = (void(*)(xfs_log_item_t*))xfs_qm_qoff_logitem_push, | |
647 | .iop_abort = (void(*)(xfs_log_item_t*))xfs_qm_qoff_logitem_abort, | |
648 | .iop_pushbuf = NULL, | |
649 | .iop_committing = (void(*)(xfs_log_item_t*, xfs_lsn_t)) | |
650 | xfs_qm_qoffend_logitem_committing | |
651 | }; | |
652 | ||
653 | /* | |
654 | * This is the ops vector shared by all quotaoff-start log items. | |
655 | */ | |
ba0f32d4 | 656 | STATIC struct xfs_item_ops xfs_qm_qoff_logitem_ops = { |
1da177e4 LT |
657 | .iop_size = (uint(*)(xfs_log_item_t*))xfs_qm_qoff_logitem_size, |
658 | .iop_format = (void(*)(xfs_log_item_t*, xfs_log_iovec_t*)) | |
659 | xfs_qm_qoff_logitem_format, | |
660 | .iop_pin = (void(*)(xfs_log_item_t*))xfs_qm_qoff_logitem_pin, | |
661 | .iop_unpin = (void(*)(xfs_log_item_t*, int)) | |
662 | xfs_qm_qoff_logitem_unpin, | |
663 | .iop_unpin_remove = (void(*)(xfs_log_item_t*,xfs_trans_t*)) | |
664 | xfs_qm_qoff_logitem_unpin_remove, | |
665 | .iop_trylock = (uint(*)(xfs_log_item_t*))xfs_qm_qoff_logitem_trylock, | |
666 | .iop_unlock = (void(*)(xfs_log_item_t*))xfs_qm_qoff_logitem_unlock, | |
667 | .iop_committed = (xfs_lsn_t(*)(xfs_log_item_t*, xfs_lsn_t)) | |
668 | xfs_qm_qoff_logitem_committed, | |
669 | .iop_push = (void(*)(xfs_log_item_t*))xfs_qm_qoff_logitem_push, | |
670 | .iop_abort = (void(*)(xfs_log_item_t*))xfs_qm_qoff_logitem_abort, | |
671 | .iop_pushbuf = NULL, | |
672 | .iop_committing = (void(*)(xfs_log_item_t*, xfs_lsn_t)) | |
673 | xfs_qm_qoff_logitem_committing | |
674 | }; | |
675 | ||
676 | /* | |
677 | * Allocate and initialize an quotaoff item of the correct quota type(s). | |
678 | */ | |
679 | xfs_qoff_logitem_t * | |
680 | xfs_qm_qoff_logitem_init( | |
681 | struct xfs_mount *mp, | |
682 | xfs_qoff_logitem_t *start, | |
683 | uint flags) | |
684 | { | |
685 | xfs_qoff_logitem_t *qf; | |
686 | ||
687 | qf = (xfs_qoff_logitem_t*) kmem_zalloc(sizeof(xfs_qoff_logitem_t), KM_SLEEP); | |
688 | ||
689 | qf->qql_item.li_type = XFS_LI_QUOTAOFF; | |
690 | if (start) | |
691 | qf->qql_item.li_ops = &xfs_qm_qoffend_logitem_ops; | |
692 | else | |
693 | qf->qql_item.li_ops = &xfs_qm_qoff_logitem_ops; | |
694 | qf->qql_item.li_mountp = mp; | |
695 | qf->qql_format.qf_type = XFS_LI_QUOTAOFF; | |
696 | qf->qql_format.qf_flags = flags; | |
697 | qf->qql_start_lip = start; | |
698 | return (qf); | |
699 | } |