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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" | |
1da177e4 LT |
26 | #include "xfs_dir2.h" |
27 | #include "xfs_alloc.h" | |
28 | #include "xfs_dmapi.h" | |
29 | #include "xfs_quota.h" | |
30 | #include "xfs_mount.h" | |
1da177e4 | 31 | #include "xfs_bmap_btree.h" |
a844f451 | 32 | #include "xfs_alloc_btree.h" |
1da177e4 | 33 | #include "xfs_ialloc_btree.h" |
1da177e4 | 34 | #include "xfs_dir2_sf.h" |
a844f451 | 35 | #include "xfs_attr_sf.h" |
1da177e4 LT |
36 | #include "xfs_dinode.h" |
37 | #include "xfs_inode.h" | |
38 | #include "xfs_bmap.h" | |
a844f451 NS |
39 | #include "xfs_btree.h" |
40 | #include "xfs_ialloc.h" | |
1da177e4 LT |
41 | #include "xfs_rtalloc.h" |
42 | #include "xfs_error.h" | |
43 | #include "xfs_itable.h" | |
44 | #include "xfs_rw.h" | |
45 | #include "xfs_acl.h" | |
1da177e4 LT |
46 | #include "xfs_attr.h" |
47 | #include "xfs_buf_item.h" | |
48 | #include "xfs_trans_priv.h" | |
1da177e4 LT |
49 | #include "xfs_qm.h" |
50 | ||
1da177e4 LT |
51 | /* |
52 | * returns the number of iovecs needed to log the given dquot item. | |
53 | */ | |
54 | /* ARGSUSED */ | |
55 | STATIC uint | |
56 | xfs_qm_dquot_logitem_size( | |
57 | xfs_dq_logitem_t *logitem) | |
58 | { | |
59 | /* | |
60 | * we need only two iovecs, one for the format, one for the real thing | |
61 | */ | |
62 | return (2); | |
63 | } | |
64 | ||
65 | /* | |
66 | * fills in the vector of log iovecs for the given dquot log item. | |
67 | */ | |
68 | STATIC void | |
69 | xfs_qm_dquot_logitem_format( | |
70 | xfs_dq_logitem_t *logitem, | |
71 | xfs_log_iovec_t *logvec) | |
72 | { | |
73 | ASSERT(logitem); | |
74 | ASSERT(logitem->qli_dquot); | |
75 | ||
76 | logvec->i_addr = (xfs_caddr_t)&logitem->qli_format; | |
77 | logvec->i_len = sizeof(xfs_dq_logformat_t); | |
fcce0f1f | 78 | XLOG_VEC_SET_TYPE(logvec, XLOG_REG_TYPE_QFORMAT); |
1da177e4 LT |
79 | logvec++; |
80 | logvec->i_addr = (xfs_caddr_t)&logitem->qli_dquot->q_core; | |
81 | logvec->i_len = sizeof(xfs_disk_dquot_t); | |
fcce0f1f | 82 | XLOG_VEC_SET_TYPE(logvec, XLOG_REG_TYPE_DQUOT); |
1da177e4 LT |
83 | |
84 | ASSERT(2 == logitem->qli_item.li_desc->lid_size); | |
85 | logitem->qli_format.qlf_size = 2; | |
86 | ||
87 | } | |
88 | ||
89 | /* | |
90 | * Increment the pin count of the given dquot. | |
91 | * This value is protected by pinlock spinlock in the xQM structure. | |
92 | */ | |
93 | STATIC void | |
94 | xfs_qm_dquot_logitem_pin( | |
95 | xfs_dq_logitem_t *logitem) | |
96 | { | |
1da177e4 LT |
97 | xfs_dquot_t *dqp; |
98 | ||
99 | dqp = logitem->qli_dquot; | |
100 | ASSERT(XFS_DQ_IS_LOCKED(dqp)); | |
869b9060 | 101 | spin_lock(&(XFS_DQ_TO_QINF(dqp)->qi_pinlock)); |
1da177e4 | 102 | dqp->q_pincount++; |
869b9060 | 103 | spin_unlock(&(XFS_DQ_TO_QINF(dqp)->qi_pinlock)); |
1da177e4 LT |
104 | } |
105 | ||
106 | /* | |
107 | * Decrement the pin count of the given dquot, and wake up | |
108 | * anyone in xfs_dqwait_unpin() if the count goes to 0. The | |
109 | * dquot must have been previously pinned with a call to xfs_dqpin(). | |
110 | */ | |
111 | /* ARGSUSED */ | |
112 | STATIC void | |
113 | xfs_qm_dquot_logitem_unpin( | |
114 | xfs_dq_logitem_t *logitem, | |
115 | int stale) | |
116 | { | |
1da177e4 LT |
117 | xfs_dquot_t *dqp; |
118 | ||
119 | dqp = logitem->qli_dquot; | |
120 | ASSERT(dqp->q_pincount > 0); | |
869b9060 | 121 | spin_lock(&(XFS_DQ_TO_QINF(dqp)->qi_pinlock)); |
1da177e4 LT |
122 | dqp->q_pincount--; |
123 | if (dqp->q_pincount == 0) { | |
124 | sv_broadcast(&dqp->q_pinwait); | |
125 | } | |
869b9060 | 126 | spin_unlock(&(XFS_DQ_TO_QINF(dqp)->qi_pinlock)); |
1da177e4 LT |
127 | } |
128 | ||
129 | /* ARGSUSED */ | |
130 | STATIC void | |
131 | xfs_qm_dquot_logitem_unpin_remove( | |
132 | xfs_dq_logitem_t *logitem, | |
133 | xfs_trans_t *tp) | |
134 | { | |
135 | xfs_qm_dquot_logitem_unpin(logitem, 0); | |
136 | } | |
137 | ||
138 | /* | |
139 | * Given the logitem, this writes the corresponding dquot entry to disk | |
140 | * asynchronously. This is called with the dquot entry securely locked; | |
141 | * we simply get xfs_qm_dqflush() to do the work, and unlock the dquot | |
142 | * at the end. | |
143 | */ | |
144 | STATIC void | |
145 | xfs_qm_dquot_logitem_push( | |
146 | xfs_dq_logitem_t *logitem) | |
147 | { | |
148 | xfs_dquot_t *dqp; | |
149 | ||
150 | dqp = logitem->qli_dquot; | |
151 | ||
152 | ASSERT(XFS_DQ_IS_LOCKED(dqp)); | |
153 | ASSERT(XFS_DQ_IS_FLUSH_LOCKED(dqp)); | |
154 | ||
155 | /* | |
156 | * Since we were able to lock the dquot's flush lock and | |
157 | * we found it on the AIL, the dquot must be dirty. This | |
158 | * is because the dquot is removed from the AIL while still | |
159 | * holding the flush lock in xfs_dqflush_done(). Thus, if | |
160 | * we found it in the AIL and were able to obtain the flush | |
161 | * lock without sleeping, then there must not have been | |
162 | * anyone in the process of flushing the dquot. | |
163 | */ | |
164 | xfs_qm_dqflush(dqp, XFS_B_DELWRI); | |
165 | xfs_dqunlock(dqp); | |
166 | } | |
167 | ||
168 | /*ARGSUSED*/ | |
169 | STATIC xfs_lsn_t | |
170 | xfs_qm_dquot_logitem_committed( | |
171 | xfs_dq_logitem_t *l, | |
172 | xfs_lsn_t lsn) | |
173 | { | |
174 | /* | |
175 | * We always re-log the entire dquot when it becomes dirty, | |
176 | * so, the latest copy _is_ the only one that matters. | |
177 | */ | |
178 | return (lsn); | |
179 | } | |
180 | ||
181 | ||
182 | /* | |
183 | * This is called to wait for the given dquot to be unpinned. | |
184 | * Most of these pin/unpin routines are plagiarized from inode code. | |
185 | */ | |
186 | void | |
187 | xfs_qm_dqunpin_wait( | |
188 | xfs_dquot_t *dqp) | |
189 | { | |
1da177e4 LT |
190 | ASSERT(XFS_DQ_IS_LOCKED(dqp)); |
191 | if (dqp->q_pincount == 0) { | |
192 | return; | |
193 | } | |
194 | ||
195 | /* | |
196 | * Give the log a push so we don't wait here too long. | |
197 | */ | |
198 | xfs_log_force(dqp->q_mount, (xfs_lsn_t)0, XFS_LOG_FORCE); | |
869b9060 | 199 | spin_lock(&(XFS_DQ_TO_QINF(dqp)->qi_pinlock)); |
1da177e4 | 200 | if (dqp->q_pincount == 0) { |
869b9060 | 201 | spin_unlock(&(XFS_DQ_TO_QINF(dqp)->qi_pinlock)); |
1da177e4 LT |
202 | return; |
203 | } | |
204 | sv_wait(&(dqp->q_pinwait), PINOD, | |
205 | &(XFS_DQ_TO_QINF(dqp)->qi_pinlock), s); | |
206 | } | |
207 | ||
208 | /* | |
209 | * This is called when IOP_TRYLOCK returns XFS_ITEM_PUSHBUF to indicate that | |
210 | * the dquot is locked by us, but the flush lock isn't. So, here we are | |
211 | * going to see if the relevant dquot buffer is incore, waiting on DELWRI. | |
212 | * If so, we want to push it out to help us take this item off the AIL as soon | |
213 | * as possible. | |
214 | * | |
287f3dad DD |
215 | * We must not be holding the AIL lock at this point. Calling incore() to |
216 | * search the buffer cache can be a time consuming thing, and AIL lock is a | |
1da177e4 LT |
217 | * spinlock. |
218 | */ | |
219 | STATIC void | |
220 | xfs_qm_dquot_logitem_pushbuf( | |
221 | xfs_dq_logitem_t *qip) | |
222 | { | |
223 | xfs_dquot_t *dqp; | |
224 | xfs_mount_t *mp; | |
225 | xfs_buf_t *bp; | |
226 | uint dopush; | |
227 | ||
228 | dqp = qip->qli_dquot; | |
229 | ASSERT(XFS_DQ_IS_LOCKED(dqp)); | |
230 | ||
231 | /* | |
232 | * The qli_pushbuf_flag keeps others from | |
233 | * trying to duplicate our effort. | |
234 | */ | |
235 | ASSERT(qip->qli_pushbuf_flag != 0); | |
3762ec6b | 236 | ASSERT(qip->qli_push_owner == current_pid()); |
1da177e4 LT |
237 | |
238 | /* | |
239 | * If flushlock isn't locked anymore, chances are that the | |
240 | * inode flush completed and the inode was taken off the AIL. | |
241 | * So, just get out. | |
242 | */ | |
0d8fee32 | 243 | if (!issemalocked(&(dqp->q_flock)) || |
1da177e4 LT |
244 | ((qip->qli_item.li_flags & XFS_LI_IN_AIL) == 0)) { |
245 | qip->qli_pushbuf_flag = 0; | |
246 | xfs_dqunlock(dqp); | |
247 | return; | |
248 | } | |
249 | mp = dqp->q_mount; | |
250 | bp = xfs_incore(mp->m_ddev_targp, qip->qli_format.qlf_blkno, | |
251 | XFS_QI_DQCHUNKLEN(mp), | |
252 | XFS_INCORE_TRYLOCK); | |
253 | if (bp != NULL) { | |
254 | if (XFS_BUF_ISDELAYWRITE(bp)) { | |
255 | dopush = ((qip->qli_item.li_flags & XFS_LI_IN_AIL) && | |
0d8fee32 | 256 | issemalocked(&(dqp->q_flock))); |
1da177e4 LT |
257 | qip->qli_pushbuf_flag = 0; |
258 | xfs_dqunlock(dqp); | |
259 | ||
260 | if (XFS_BUF_ISPINNED(bp)) { | |
261 | xfs_log_force(mp, (xfs_lsn_t)0, | |
262 | XFS_LOG_FORCE); | |
263 | } | |
264 | if (dopush) { | |
265 | #ifdef XFSRACEDEBUG | |
266 | delay_for_intr(); | |
267 | delay(300); | |
268 | #endif | |
269 | xfs_bawrite(mp, bp); | |
270 | } else { | |
271 | xfs_buf_relse(bp); | |
272 | } | |
273 | } else { | |
274 | qip->qli_pushbuf_flag = 0; | |
275 | xfs_dqunlock(dqp); | |
276 | xfs_buf_relse(bp); | |
277 | } | |
278 | return; | |
279 | } | |
280 | ||
281 | qip->qli_pushbuf_flag = 0; | |
282 | xfs_dqunlock(dqp); | |
283 | } | |
284 | ||
285 | /* | |
286 | * This is called to attempt to lock the dquot associated with this | |
287 | * dquot log item. Don't sleep on the dquot lock or the flush lock. | |
288 | * If the flush lock is already held, indicating that the dquot has | |
289 | * been or is in the process of being flushed, then see if we can | |
290 | * find the dquot's buffer in the buffer cache without sleeping. If | |
291 | * we can and it is marked delayed write, then we want to send it out. | |
292 | * We delay doing so until the push routine, though, to avoid sleeping | |
293 | * in any device strategy routines. | |
294 | */ | |
295 | STATIC uint | |
296 | xfs_qm_dquot_logitem_trylock( | |
297 | xfs_dq_logitem_t *qip) | |
298 | { | |
299 | xfs_dquot_t *dqp; | |
300 | uint retval; | |
301 | ||
302 | dqp = qip->qli_dquot; | |
303 | if (dqp->q_pincount > 0) | |
304 | return (XFS_ITEM_PINNED); | |
305 | ||
306 | if (! xfs_qm_dqlock_nowait(dqp)) | |
307 | return (XFS_ITEM_LOCKED); | |
308 | ||
309 | retval = XFS_ITEM_SUCCESS; | |
310 | if (! xfs_qm_dqflock_nowait(dqp)) { | |
311 | /* | |
312 | * The dquot is already being flushed. It may have been | |
313 | * flushed delayed write, however, and we don't want to | |
314 | * get stuck waiting for that to complete. So, we want to check | |
315 | * to see if we can lock the dquot's buffer without sleeping. | |
316 | * If we can and it is marked for delayed write, then we | |
317 | * hold it and send it out from the push routine. We don't | |
318 | * want to do that now since we might sleep in the device | |
319 | * strategy routine. We also don't want to grab the buffer lock | |
320 | * here because we'd like not to call into the buffer cache | |
287f3dad | 321 | * while holding the AIL lock. |
1da177e4 LT |
322 | * Make sure to only return PUSHBUF if we set pushbuf_flag |
323 | * ourselves. If someone else is doing it then we don't | |
324 | * want to go to the push routine and duplicate their efforts. | |
325 | */ | |
326 | if (qip->qli_pushbuf_flag == 0) { | |
327 | qip->qli_pushbuf_flag = 1; | |
328 | ASSERT(qip->qli_format.qlf_blkno == dqp->q_blkno); | |
329 | #ifdef DEBUG | |
3762ec6b | 330 | qip->qli_push_owner = current_pid(); |
1da177e4 LT |
331 | #endif |
332 | /* | |
333 | * The dquot is left locked. | |
334 | */ | |
335 | retval = XFS_ITEM_PUSHBUF; | |
336 | } else { | |
337 | retval = XFS_ITEM_FLUSHING; | |
338 | xfs_dqunlock_nonotify(dqp); | |
339 | } | |
340 | } | |
341 | ||
342 | ASSERT(qip->qli_item.li_flags & XFS_LI_IN_AIL); | |
343 | return (retval); | |
344 | } | |
345 | ||
346 | ||
347 | /* | |
348 | * Unlock the dquot associated with the log item. | |
349 | * Clear the fields of the dquot and dquot log item that | |
350 | * are specific to the current transaction. If the | |
351 | * hold flags is set, do not unlock the dquot. | |
352 | */ | |
353 | STATIC void | |
354 | xfs_qm_dquot_logitem_unlock( | |
355 | xfs_dq_logitem_t *ql) | |
356 | { | |
357 | xfs_dquot_t *dqp; | |
358 | ||
359 | ASSERT(ql != NULL); | |
360 | dqp = ql->qli_dquot; | |
361 | ASSERT(XFS_DQ_IS_LOCKED(dqp)); | |
362 | ||
363 | /* | |
364 | * Clear the transaction pointer in the dquot | |
365 | */ | |
366 | dqp->q_transp = NULL; | |
367 | ||
368 | /* | |
369 | * dquots are never 'held' from getting unlocked at the end of | |
370 | * a transaction. Their locking and unlocking is hidden inside the | |
371 | * transaction layer, within trans_commit. Hence, no LI_HOLD flag | |
372 | * for the logitem. | |
373 | */ | |
374 | xfs_dqunlock(dqp); | |
375 | } | |
376 | ||
377 | ||
1da177e4 LT |
378 | /* |
379 | * this needs to stamp an lsn into the dquot, I think. | |
380 | * rpc's that look at user dquot's would then have to | |
381 | * push on the dependency recorded in the dquot | |
382 | */ | |
383 | /* ARGSUSED */ | |
384 | STATIC void | |
385 | xfs_qm_dquot_logitem_committing( | |
386 | xfs_dq_logitem_t *l, | |
387 | xfs_lsn_t lsn) | |
388 | { | |
389 | return; | |
390 | } | |
391 | ||
392 | ||
393 | /* | |
394 | * This is the ops vector for dquots | |
395 | */ | |
7989cb8e | 396 | static struct xfs_item_ops xfs_dquot_item_ops = { |
1da177e4 LT |
397 | .iop_size = (uint(*)(xfs_log_item_t*))xfs_qm_dquot_logitem_size, |
398 | .iop_format = (void(*)(xfs_log_item_t*, xfs_log_iovec_t*)) | |
399 | xfs_qm_dquot_logitem_format, | |
400 | .iop_pin = (void(*)(xfs_log_item_t*))xfs_qm_dquot_logitem_pin, | |
401 | .iop_unpin = (void(*)(xfs_log_item_t*, int)) | |
402 | xfs_qm_dquot_logitem_unpin, | |
403 | .iop_unpin_remove = (void(*)(xfs_log_item_t*, xfs_trans_t*)) | |
404 | xfs_qm_dquot_logitem_unpin_remove, | |
405 | .iop_trylock = (uint(*)(xfs_log_item_t*)) | |
406 | xfs_qm_dquot_logitem_trylock, | |
407 | .iop_unlock = (void(*)(xfs_log_item_t*))xfs_qm_dquot_logitem_unlock, | |
408 | .iop_committed = (xfs_lsn_t(*)(xfs_log_item_t*, xfs_lsn_t)) | |
409 | xfs_qm_dquot_logitem_committed, | |
410 | .iop_push = (void(*)(xfs_log_item_t*))xfs_qm_dquot_logitem_push, | |
1da177e4 LT |
411 | .iop_pushbuf = (void(*)(xfs_log_item_t*)) |
412 | xfs_qm_dquot_logitem_pushbuf, | |
413 | .iop_committing = (void(*)(xfs_log_item_t*, xfs_lsn_t)) | |
414 | xfs_qm_dquot_logitem_committing | |
415 | }; | |
416 | ||
417 | /* | |
418 | * Initialize the dquot log item for a newly allocated dquot. | |
419 | * The dquot isn't locked at this point, but it isn't on any of the lists | |
420 | * either, so we don't care. | |
421 | */ | |
422 | void | |
423 | xfs_qm_dquot_logitem_init( | |
424 | struct xfs_dquot *dqp) | |
425 | { | |
426 | xfs_dq_logitem_t *lp; | |
427 | lp = &dqp->q_logitem; | |
428 | ||
429 | lp->qli_item.li_type = XFS_LI_DQUOT; | |
430 | lp->qli_item.li_ops = &xfs_dquot_item_ops; | |
431 | lp->qli_item.li_mountp = dqp->q_mount; | |
432 | lp->qli_dquot = dqp; | |
433 | lp->qli_format.qlf_type = XFS_LI_DQUOT; | |
1149d96a | 434 | lp->qli_format.qlf_id = be32_to_cpu(dqp->q_core.d_id); |
1da177e4 LT |
435 | lp->qli_format.qlf_blkno = dqp->q_blkno; |
436 | lp->qli_format.qlf_len = 1; | |
437 | /* | |
438 | * This is just the offset of this dquot within its buffer | |
439 | * (which is currently 1 FSB and probably won't change). | |
440 | * Hence 32 bits for this offset should be just fine. | |
441 | * Alternatively, we can store (bufoffset / sizeof(xfs_dqblk_t)) | |
442 | * here, and recompute it at recovery time. | |
443 | */ | |
444 | lp->qli_format.qlf_boffset = (__uint32_t)dqp->q_bufoffset; | |
445 | } | |
446 | ||
447 | /*------------------ QUOTAOFF LOG ITEMS -------------------*/ | |
448 | ||
449 | /* | |
450 | * This returns the number of iovecs needed to log the given quotaoff item. | |
451 | * We only need 1 iovec for an quotaoff item. It just logs the | |
452 | * quotaoff_log_format structure. | |
453 | */ | |
454 | /*ARGSUSED*/ | |
455 | STATIC uint | |
456 | xfs_qm_qoff_logitem_size(xfs_qoff_logitem_t *qf) | |
457 | { | |
458 | return (1); | |
459 | } | |
460 | ||
461 | /* | |
462 | * This is called to fill in the vector of log iovecs for the | |
463 | * given quotaoff log item. We use only 1 iovec, and we point that | |
464 | * at the quotaoff_log_format structure embedded in the quotaoff item. | |
465 | * It is at this point that we assert that all of the extent | |
466 | * slots in the quotaoff item have been filled. | |
467 | */ | |
468 | STATIC void | |
469 | xfs_qm_qoff_logitem_format(xfs_qoff_logitem_t *qf, | |
470 | xfs_log_iovec_t *log_vector) | |
471 | { | |
472 | ASSERT(qf->qql_format.qf_type == XFS_LI_QUOTAOFF); | |
473 | ||
474 | log_vector->i_addr = (xfs_caddr_t)&(qf->qql_format); | |
475 | log_vector->i_len = sizeof(xfs_qoff_logitem_t); | |
7e9c6396 | 476 | XLOG_VEC_SET_TYPE(log_vector, XLOG_REG_TYPE_QUOTAOFF); |
1da177e4 LT |
477 | qf->qql_format.qf_size = 1; |
478 | } | |
479 | ||
480 | ||
481 | /* | |
482 | * Pinning has no meaning for an quotaoff item, so just return. | |
483 | */ | |
484 | /*ARGSUSED*/ | |
485 | STATIC void | |
486 | xfs_qm_qoff_logitem_pin(xfs_qoff_logitem_t *qf) | |
487 | { | |
488 | return; | |
489 | } | |
490 | ||
491 | ||
492 | /* | |
493 | * Since pinning has no meaning for an quotaoff item, unpinning does | |
494 | * not either. | |
495 | */ | |
496 | /*ARGSUSED*/ | |
497 | STATIC void | |
498 | xfs_qm_qoff_logitem_unpin(xfs_qoff_logitem_t *qf, int stale) | |
499 | { | |
500 | return; | |
501 | } | |
502 | ||
503 | /*ARGSUSED*/ | |
504 | STATIC void | |
505 | xfs_qm_qoff_logitem_unpin_remove(xfs_qoff_logitem_t *qf, xfs_trans_t *tp) | |
506 | { | |
507 | return; | |
508 | } | |
509 | ||
510 | /* | |
511 | * Quotaoff items have no locking, so just return success. | |
512 | */ | |
513 | /*ARGSUSED*/ | |
514 | STATIC uint | |
515 | xfs_qm_qoff_logitem_trylock(xfs_qoff_logitem_t *qf) | |
516 | { | |
517 | return XFS_ITEM_LOCKED; | |
518 | } | |
519 | ||
520 | /* | |
521 | * Quotaoff items have no locking or pushing, so return failure | |
522 | * so that the caller doesn't bother with us. | |
523 | */ | |
524 | /*ARGSUSED*/ | |
525 | STATIC void | |
526 | xfs_qm_qoff_logitem_unlock(xfs_qoff_logitem_t *qf) | |
527 | { | |
528 | return; | |
529 | } | |
530 | ||
531 | /* | |
532 | * The quotaoff-start-item is logged only once and cannot be moved in the log, | |
533 | * so simply return the lsn at which it's been logged. | |
534 | */ | |
535 | /*ARGSUSED*/ | |
536 | STATIC xfs_lsn_t | |
537 | xfs_qm_qoff_logitem_committed(xfs_qoff_logitem_t *qf, xfs_lsn_t lsn) | |
538 | { | |
539 | return (lsn); | |
540 | } | |
541 | ||
1da177e4 LT |
542 | /* |
543 | * There isn't much you can do to push on an quotaoff item. It is simply | |
544 | * stuck waiting for the log to be flushed to disk. | |
545 | */ | |
546 | /*ARGSUSED*/ | |
547 | STATIC void | |
548 | xfs_qm_qoff_logitem_push(xfs_qoff_logitem_t *qf) | |
549 | { | |
550 | return; | |
551 | } | |
552 | ||
553 | ||
554 | /*ARGSUSED*/ | |
555 | STATIC xfs_lsn_t | |
556 | xfs_qm_qoffend_logitem_committed( | |
557 | xfs_qoff_logitem_t *qfe, | |
558 | xfs_lsn_t lsn) | |
559 | { | |
560 | xfs_qoff_logitem_t *qfs; | |
1da177e4 LT |
561 | |
562 | qfs = qfe->qql_start_lip; | |
287f3dad | 563 | spin_lock(&qfs->qql_item.li_mountp->m_ail_lock); |
1da177e4 LT |
564 | /* |
565 | * Delete the qoff-start logitem from the AIL. | |
566 | * xfs_trans_delete_ail() drops the AIL lock. | |
567 | */ | |
287f3dad | 568 | xfs_trans_delete_ail(qfs->qql_item.li_mountp, (xfs_log_item_t *)qfs); |
1da177e4 LT |
569 | kmem_free(qfs, sizeof(xfs_qoff_logitem_t)); |
570 | kmem_free(qfe, sizeof(xfs_qoff_logitem_t)); | |
571 | return (xfs_lsn_t)-1; | |
572 | } | |
573 | ||
574 | /* | |
575 | * XXX rcc - don't know quite what to do with this. I think we can | |
576 | * just ignore it. The only time that isn't the case is if we allow | |
577 | * the client to somehow see that quotas have been turned off in which | |
578 | * we can't allow that to get back until the quotaoff hits the disk. | |
579 | * So how would that happen? Also, do we need different routines for | |
580 | * quotaoff start and quotaoff end? I suspect the answer is yes but | |
581 | * to be sure, I need to look at the recovery code and see how quota off | |
582 | * recovery is handled (do we roll forward or back or do something else). | |
583 | * If we roll forwards or backwards, then we need two separate routines, | |
584 | * one that does nothing and one that stamps in the lsn that matters | |
585 | * (truly makes the quotaoff irrevocable). If we do something else, | |
586 | * then maybe we don't need two. | |
587 | */ | |
588 | /* ARGSUSED */ | |
589 | STATIC void | |
590 | xfs_qm_qoff_logitem_committing(xfs_qoff_logitem_t *qip, xfs_lsn_t commit_lsn) | |
591 | { | |
592 | return; | |
593 | } | |
594 | ||
595 | /* ARGSUSED */ | |
596 | STATIC void | |
597 | xfs_qm_qoffend_logitem_committing(xfs_qoff_logitem_t *qip, xfs_lsn_t commit_lsn) | |
598 | { | |
599 | return; | |
600 | } | |
601 | ||
7989cb8e | 602 | static struct xfs_item_ops xfs_qm_qoffend_logitem_ops = { |
1da177e4 LT |
603 | .iop_size = (uint(*)(xfs_log_item_t*))xfs_qm_qoff_logitem_size, |
604 | .iop_format = (void(*)(xfs_log_item_t*, xfs_log_iovec_t*)) | |
605 | xfs_qm_qoff_logitem_format, | |
606 | .iop_pin = (void(*)(xfs_log_item_t*))xfs_qm_qoff_logitem_pin, | |
607 | .iop_unpin = (void(*)(xfs_log_item_t* ,int)) | |
608 | xfs_qm_qoff_logitem_unpin, | |
609 | .iop_unpin_remove = (void(*)(xfs_log_item_t*,xfs_trans_t*)) | |
610 | xfs_qm_qoff_logitem_unpin_remove, | |
611 | .iop_trylock = (uint(*)(xfs_log_item_t*))xfs_qm_qoff_logitem_trylock, | |
612 | .iop_unlock = (void(*)(xfs_log_item_t*))xfs_qm_qoff_logitem_unlock, | |
613 | .iop_committed = (xfs_lsn_t(*)(xfs_log_item_t*, xfs_lsn_t)) | |
614 | xfs_qm_qoffend_logitem_committed, | |
615 | .iop_push = (void(*)(xfs_log_item_t*))xfs_qm_qoff_logitem_push, | |
1da177e4 LT |
616 | .iop_pushbuf = NULL, |
617 | .iop_committing = (void(*)(xfs_log_item_t*, xfs_lsn_t)) | |
618 | xfs_qm_qoffend_logitem_committing | |
619 | }; | |
620 | ||
621 | /* | |
622 | * This is the ops vector shared by all quotaoff-start log items. | |
623 | */ | |
7989cb8e | 624 | static struct xfs_item_ops xfs_qm_qoff_logitem_ops = { |
1da177e4 LT |
625 | .iop_size = (uint(*)(xfs_log_item_t*))xfs_qm_qoff_logitem_size, |
626 | .iop_format = (void(*)(xfs_log_item_t*, xfs_log_iovec_t*)) | |
627 | xfs_qm_qoff_logitem_format, | |
628 | .iop_pin = (void(*)(xfs_log_item_t*))xfs_qm_qoff_logitem_pin, | |
629 | .iop_unpin = (void(*)(xfs_log_item_t*, int)) | |
630 | xfs_qm_qoff_logitem_unpin, | |
631 | .iop_unpin_remove = (void(*)(xfs_log_item_t*,xfs_trans_t*)) | |
632 | xfs_qm_qoff_logitem_unpin_remove, | |
633 | .iop_trylock = (uint(*)(xfs_log_item_t*))xfs_qm_qoff_logitem_trylock, | |
634 | .iop_unlock = (void(*)(xfs_log_item_t*))xfs_qm_qoff_logitem_unlock, | |
635 | .iop_committed = (xfs_lsn_t(*)(xfs_log_item_t*, xfs_lsn_t)) | |
636 | xfs_qm_qoff_logitem_committed, | |
637 | .iop_push = (void(*)(xfs_log_item_t*))xfs_qm_qoff_logitem_push, | |
1da177e4 LT |
638 | .iop_pushbuf = NULL, |
639 | .iop_committing = (void(*)(xfs_log_item_t*, xfs_lsn_t)) | |
640 | xfs_qm_qoff_logitem_committing | |
641 | }; | |
642 | ||
643 | /* | |
644 | * Allocate and initialize an quotaoff item of the correct quota type(s). | |
645 | */ | |
646 | xfs_qoff_logitem_t * | |
647 | xfs_qm_qoff_logitem_init( | |
648 | struct xfs_mount *mp, | |
649 | xfs_qoff_logitem_t *start, | |
650 | uint flags) | |
651 | { | |
652 | xfs_qoff_logitem_t *qf; | |
653 | ||
654 | qf = (xfs_qoff_logitem_t*) kmem_zalloc(sizeof(xfs_qoff_logitem_t), KM_SLEEP); | |
655 | ||
656 | qf->qql_item.li_type = XFS_LI_QUOTAOFF; | |
657 | if (start) | |
658 | qf->qql_item.li_ops = &xfs_qm_qoffend_logitem_ops; | |
659 | else | |
660 | qf->qql_item.li_ops = &xfs_qm_qoff_logitem_ops; | |
661 | qf->qql_item.li_mountp = mp; | |
662 | qf->qql_format.qf_type = XFS_LI_QUOTAOFF; | |
663 | qf->qql_format.qf_flags = flags; | |
664 | qf->qql_start_lip = start; | |
665 | return (qf); | |
666 | } |