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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" | |
6ca1c906 | 20 | #include "xfs_format.h" |
239880ef DC |
21 | #include "xfs_log_format.h" |
22 | #include "xfs_trans_resv.h" | |
1da177e4 | 23 | #include "xfs_mount.h" |
1da177e4 | 24 | #include "xfs_inode.h" |
a4fbe6ab | 25 | #include "xfs_quota.h" |
1da177e4 | 26 | #include "xfs_error.h" |
239880ef | 27 | #include "xfs_trans.h" |
1da177e4 LT |
28 | #include "xfs_buf_item.h" |
29 | #include "xfs_trans_priv.h" | |
1da177e4 | 30 | #include "xfs_qm.h" |
239880ef | 31 | #include "xfs_log.h" |
1da177e4 | 32 | |
7bfa31d8 CH |
33 | static inline struct xfs_dq_logitem *DQUOT_ITEM(struct xfs_log_item *lip) |
34 | { | |
35 | return container_of(lip, struct xfs_dq_logitem, qli_item); | |
36 | } | |
37 | ||
1da177e4 LT |
38 | /* |
39 | * returns the number of iovecs needed to log the given dquot item. | |
40 | */ | |
166d1368 | 41 | STATIC void |
1da177e4 | 42 | xfs_qm_dquot_logitem_size( |
166d1368 DC |
43 | struct xfs_log_item *lip, |
44 | int *nvecs, | |
45 | int *nbytes) | |
1da177e4 | 46 | { |
166d1368 DC |
47 | *nvecs += 2; |
48 | *nbytes += sizeof(struct xfs_dq_logformat) + | |
49 | sizeof(struct xfs_disk_dquot); | |
1da177e4 LT |
50 | } |
51 | ||
52 | /* | |
53 | * fills in the vector of log iovecs for the given dquot log item. | |
54 | */ | |
55 | STATIC void | |
56 | xfs_qm_dquot_logitem_format( | |
7bfa31d8 | 57 | struct xfs_log_item *lip, |
bde7cff6 | 58 | struct xfs_log_vec *lv) |
1da177e4 | 59 | { |
7bfa31d8 | 60 | struct xfs_dq_logitem *qlip = DQUOT_ITEM(lip); |
bde7cff6 | 61 | struct xfs_log_iovec *vecp = NULL; |
ce8e9629 | 62 | struct xfs_dq_logformat *qlf; |
1da177e4 | 63 | |
ce8e9629 CH |
64 | qlf = xlog_prepare_iovec(lv, &vecp, XLOG_REG_TYPE_QFORMAT); |
65 | qlf->qlf_type = XFS_LI_DQUOT; | |
66 | qlf->qlf_size = 2; | |
67 | qlf->qlf_id = be32_to_cpu(qlip->qli_dquot->q_core.d_id); | |
68 | qlf->qlf_blkno = qlip->qli_dquot->q_blkno; | |
69 | qlf->qlf_len = 1; | |
70 | qlf->qlf_boffset = qlip->qli_dquot->q_bufoffset; | |
71 | xlog_finish_iovec(lv, vecp, sizeof(struct xfs_dq_logformat)); | |
bde7cff6 | 72 | |
bde7cff6 | 73 | xlog_copy_iovec(lv, &vecp, XLOG_REG_TYPE_DQUOT, |
1234351c CH |
74 | &qlip->qli_dquot->q_core, |
75 | sizeof(struct xfs_disk_dquot)); | |
1da177e4 LT |
76 | } |
77 | ||
78 | /* | |
79 | * Increment the pin count of the given dquot. | |
1da177e4 LT |
80 | */ |
81 | STATIC void | |
82 | xfs_qm_dquot_logitem_pin( | |
7bfa31d8 | 83 | struct xfs_log_item *lip) |
1da177e4 | 84 | { |
7bfa31d8 | 85 | struct xfs_dquot *dqp = DQUOT_ITEM(lip)->qli_dquot; |
1da177e4 | 86 | |
1da177e4 | 87 | ASSERT(XFS_DQ_IS_LOCKED(dqp)); |
d1de8021 | 88 | atomic_inc(&dqp->q_pincount); |
1da177e4 LT |
89 | } |
90 | ||
91 | /* | |
92 | * Decrement the pin count of the given dquot, and wake up | |
93 | * anyone in xfs_dqwait_unpin() if the count goes to 0. The | |
bc3048e3 PL |
94 | * dquot must have been previously pinned with a call to |
95 | * xfs_qm_dquot_logitem_pin(). | |
1da177e4 | 96 | */ |
1da177e4 LT |
97 | STATIC void |
98 | xfs_qm_dquot_logitem_unpin( | |
7bfa31d8 | 99 | struct xfs_log_item *lip, |
9412e318 | 100 | int remove) |
1da177e4 | 101 | { |
7bfa31d8 | 102 | struct xfs_dquot *dqp = DQUOT_ITEM(lip)->qli_dquot; |
1da177e4 | 103 | |
bc3048e3 PL |
104 | ASSERT(atomic_read(&dqp->q_pincount) > 0); |
105 | if (atomic_dec_and_test(&dqp->q_pincount)) | |
106 | wake_up(&dqp->q_pinwait); | |
1da177e4 LT |
107 | } |
108 | ||
1da177e4 LT |
109 | STATIC xfs_lsn_t |
110 | xfs_qm_dquot_logitem_committed( | |
7bfa31d8 | 111 | struct xfs_log_item *lip, |
1da177e4 LT |
112 | xfs_lsn_t lsn) |
113 | { | |
114 | /* | |
115 | * We always re-log the entire dquot when it becomes dirty, | |
116 | * so, the latest copy _is_ the only one that matters. | |
117 | */ | |
7bfa31d8 | 118 | return lsn; |
1da177e4 LT |
119 | } |
120 | ||
1da177e4 LT |
121 | /* |
122 | * This is called to wait for the given dquot to be unpinned. | |
123 | * Most of these pin/unpin routines are plagiarized from inode code. | |
124 | */ | |
125 | void | |
126 | xfs_qm_dqunpin_wait( | |
7bfa31d8 | 127 | struct xfs_dquot *dqp) |
1da177e4 | 128 | { |
1da177e4 | 129 | ASSERT(XFS_DQ_IS_LOCKED(dqp)); |
bc3048e3 | 130 | if (atomic_read(&dqp->q_pincount) == 0) |
1da177e4 | 131 | return; |
1da177e4 LT |
132 | |
133 | /* | |
134 | * Give the log a push so we don't wait here too long. | |
135 | */ | |
a14a348b | 136 | xfs_log_force(dqp->q_mount, 0); |
bc3048e3 | 137 | wait_event(dqp->q_pinwait, (atomic_read(&dqp->q_pincount) == 0)); |
1da177e4 LT |
138 | } |
139 | ||
1da177e4 | 140 | STATIC uint |
43ff2122 CH |
141 | xfs_qm_dquot_logitem_push( |
142 | struct xfs_log_item *lip, | |
a30b0367 DC |
143 | struct list_head *buffer_list) __releases(&lip->li_ailp->xa_lock) |
144 | __acquires(&lip->li_ailp->xa_lock) | |
1da177e4 | 145 | { |
7bfa31d8 | 146 | struct xfs_dquot *dqp = DQUOT_ITEM(lip)->qli_dquot; |
43ff2122 CH |
147 | struct xfs_buf *bp = NULL; |
148 | uint rval = XFS_ITEM_SUCCESS; | |
149 | int error; | |
1da177e4 | 150 | |
bc3048e3 | 151 | if (atomic_read(&dqp->q_pincount) > 0) |
d808f617 | 152 | return XFS_ITEM_PINNED; |
1da177e4 | 153 | |
800b484e | 154 | if (!xfs_dqlock_nowait(dqp)) |
d808f617 | 155 | return XFS_ITEM_LOCKED; |
1da177e4 | 156 | |
fe7257fd CH |
157 | /* |
158 | * Re-check the pincount now that we stabilized the value by | |
159 | * taking the quota lock. | |
160 | */ | |
161 | if (atomic_read(&dqp->q_pincount) > 0) { | |
43ff2122 CH |
162 | rval = XFS_ITEM_PINNED; |
163 | goto out_unlock; | |
fe7257fd CH |
164 | } |
165 | ||
43ff2122 CH |
166 | /* |
167 | * Someone else is already flushing the dquot. Nothing we can do | |
168 | * here but wait for the flush to finish and remove the item from | |
169 | * the AIL. | |
170 | */ | |
e1f49cf2 | 171 | if (!xfs_dqflock_nowait(dqp)) { |
43ff2122 CH |
172 | rval = XFS_ITEM_FLUSHING; |
173 | goto out_unlock; | |
174 | } | |
175 | ||
176 | spin_unlock(&lip->li_ailp->xa_lock); | |
177 | ||
178 | error = xfs_qm_dqflush(dqp, &bp); | |
179 | if (error) { | |
180 | xfs_warn(dqp->q_mount, "%s: push error %d on dqp %p", | |
181 | __func__, error, dqp); | |
182 | } else { | |
183 | if (!xfs_buf_delwri_queue(bp, buffer_list)) | |
184 | rval = XFS_ITEM_FLUSHING; | |
185 | xfs_buf_relse(bp); | |
1da177e4 LT |
186 | } |
187 | ||
43ff2122 CH |
188 | spin_lock(&lip->li_ailp->xa_lock); |
189 | out_unlock: | |
190 | xfs_dqunlock(dqp); | |
191 | return rval; | |
1da177e4 LT |
192 | } |
193 | ||
1da177e4 LT |
194 | /* |
195 | * Unlock the dquot associated with the log item. | |
196 | * Clear the fields of the dquot and dquot log item that | |
197 | * are specific to the current transaction. If the | |
198 | * hold flags is set, do not unlock the dquot. | |
199 | */ | |
200 | STATIC void | |
201 | xfs_qm_dquot_logitem_unlock( | |
7bfa31d8 | 202 | struct xfs_log_item *lip) |
1da177e4 | 203 | { |
7bfa31d8 | 204 | struct xfs_dquot *dqp = DQUOT_ITEM(lip)->qli_dquot; |
1da177e4 | 205 | |
1da177e4 LT |
206 | ASSERT(XFS_DQ_IS_LOCKED(dqp)); |
207 | ||
208 | /* | |
209 | * Clear the transaction pointer in the dquot | |
210 | */ | |
211 | dqp->q_transp = NULL; | |
212 | ||
213 | /* | |
214 | * dquots are never 'held' from getting unlocked at the end of | |
215 | * a transaction. Their locking and unlocking is hidden inside the | |
216 | * transaction layer, within trans_commit. Hence, no LI_HOLD flag | |
217 | * for the logitem. | |
218 | */ | |
219 | xfs_dqunlock(dqp); | |
220 | } | |
221 | ||
1da177e4 LT |
222 | /* |
223 | * this needs to stamp an lsn into the dquot, I think. | |
224 | * rpc's that look at user dquot's would then have to | |
225 | * push on the dependency recorded in the dquot | |
226 | */ | |
1da177e4 LT |
227 | STATIC void |
228 | xfs_qm_dquot_logitem_committing( | |
7bfa31d8 | 229 | struct xfs_log_item *lip, |
1da177e4 LT |
230 | xfs_lsn_t lsn) |
231 | { | |
1da177e4 LT |
232 | } |
233 | ||
1da177e4 LT |
234 | /* |
235 | * This is the ops vector for dquots | |
236 | */ | |
272e42b2 | 237 | static const struct xfs_item_ops xfs_dquot_item_ops = { |
7bfa31d8 CH |
238 | .iop_size = xfs_qm_dquot_logitem_size, |
239 | .iop_format = xfs_qm_dquot_logitem_format, | |
240 | .iop_pin = xfs_qm_dquot_logitem_pin, | |
241 | .iop_unpin = xfs_qm_dquot_logitem_unpin, | |
7bfa31d8 CH |
242 | .iop_unlock = xfs_qm_dquot_logitem_unlock, |
243 | .iop_committed = xfs_qm_dquot_logitem_committed, | |
244 | .iop_push = xfs_qm_dquot_logitem_push, | |
7bfa31d8 | 245 | .iop_committing = xfs_qm_dquot_logitem_committing |
1da177e4 LT |
246 | }; |
247 | ||
248 | /* | |
249 | * Initialize the dquot log item for a newly allocated dquot. | |
250 | * The dquot isn't locked at this point, but it isn't on any of the lists | |
251 | * either, so we don't care. | |
252 | */ | |
253 | void | |
254 | xfs_qm_dquot_logitem_init( | |
7bfa31d8 | 255 | struct xfs_dquot *dqp) |
1da177e4 | 256 | { |
7bfa31d8 | 257 | struct xfs_dq_logitem *lp = &dqp->q_logitem; |
1da177e4 | 258 | |
43f5efc5 DC |
259 | xfs_log_item_init(dqp->q_mount, &lp->qli_item, XFS_LI_DQUOT, |
260 | &xfs_dquot_item_ops); | |
1da177e4 | 261 | lp->qli_dquot = dqp; |
1da177e4 LT |
262 | } |
263 | ||
264 | /*------------------ QUOTAOFF LOG ITEMS -------------------*/ | |
265 | ||
7bfa31d8 CH |
266 | static inline struct xfs_qoff_logitem *QOFF_ITEM(struct xfs_log_item *lip) |
267 | { | |
268 | return container_of(lip, struct xfs_qoff_logitem, qql_item); | |
269 | } | |
270 | ||
271 | ||
1da177e4 LT |
272 | /* |
273 | * This returns the number of iovecs needed to log the given quotaoff item. | |
274 | * We only need 1 iovec for an quotaoff item. It just logs the | |
275 | * quotaoff_log_format structure. | |
276 | */ | |
166d1368 | 277 | STATIC void |
7bfa31d8 | 278 | xfs_qm_qoff_logitem_size( |
166d1368 DC |
279 | struct xfs_log_item *lip, |
280 | int *nvecs, | |
281 | int *nbytes) | |
1da177e4 | 282 | { |
166d1368 DC |
283 | *nvecs += 1; |
284 | *nbytes += sizeof(struct xfs_qoff_logitem); | |
1da177e4 LT |
285 | } |
286 | ||
1da177e4 | 287 | STATIC void |
7bfa31d8 CH |
288 | xfs_qm_qoff_logitem_format( |
289 | struct xfs_log_item *lip, | |
bde7cff6 | 290 | struct xfs_log_vec *lv) |
1da177e4 | 291 | { |
7bfa31d8 | 292 | struct xfs_qoff_logitem *qflip = QOFF_ITEM(lip); |
bde7cff6 | 293 | struct xfs_log_iovec *vecp = NULL; |
ffda4e83 | 294 | struct xfs_qoff_logformat *qlf; |
1da177e4 | 295 | |
ffda4e83 CH |
296 | qlf = xlog_prepare_iovec(lv, &vecp, XLOG_REG_TYPE_QUOTAOFF); |
297 | qlf->qf_type = XFS_LI_QUOTAOFF; | |
298 | qlf->qf_size = 1; | |
299 | qlf->qf_flags = qflip->qql_flags; | |
300 | xlog_finish_iovec(lv, vecp, sizeof(struct xfs_qoff_logitem)); | |
1da177e4 LT |
301 | } |
302 | ||
1da177e4 LT |
303 | /* |
304 | * Pinning has no meaning for an quotaoff item, so just return. | |
305 | */ | |
1da177e4 | 306 | STATIC void |
7bfa31d8 CH |
307 | xfs_qm_qoff_logitem_pin( |
308 | struct xfs_log_item *lip) | |
1da177e4 | 309 | { |
1da177e4 LT |
310 | } |
311 | ||
1da177e4 LT |
312 | /* |
313 | * Since pinning has no meaning for an quotaoff item, unpinning does | |
314 | * not either. | |
315 | */ | |
1da177e4 | 316 | STATIC void |
7bfa31d8 CH |
317 | xfs_qm_qoff_logitem_unpin( |
318 | struct xfs_log_item *lip, | |
319 | int remove) | |
1da177e4 | 320 | { |
1da177e4 LT |
321 | } |
322 | ||
323 | /* | |
43ff2122 CH |
324 | * There isn't much you can do to push a quotaoff item. It is simply |
325 | * stuck waiting for the log to be flushed to disk. | |
1da177e4 | 326 | */ |
1da177e4 | 327 | STATIC uint |
43ff2122 CH |
328 | xfs_qm_qoff_logitem_push( |
329 | struct xfs_log_item *lip, | |
330 | struct list_head *buffer_list) | |
1da177e4 LT |
331 | { |
332 | return XFS_ITEM_LOCKED; | |
333 | } | |
334 | ||
335 | /* | |
336 | * Quotaoff items have no locking or pushing, so return failure | |
337 | * so that the caller doesn't bother with us. | |
338 | */ | |
1da177e4 | 339 | STATIC void |
7bfa31d8 CH |
340 | xfs_qm_qoff_logitem_unlock( |
341 | struct xfs_log_item *lip) | |
1da177e4 | 342 | { |
1da177e4 LT |
343 | } |
344 | ||
345 | /* | |
346 | * The quotaoff-start-item is logged only once and cannot be moved in the log, | |
347 | * so simply return the lsn at which it's been logged. | |
348 | */ | |
1da177e4 | 349 | STATIC xfs_lsn_t |
7bfa31d8 CH |
350 | xfs_qm_qoff_logitem_committed( |
351 | struct xfs_log_item *lip, | |
352 | xfs_lsn_t lsn) | |
1da177e4 | 353 | { |
7bfa31d8 | 354 | return lsn; |
1da177e4 LT |
355 | } |
356 | ||
1da177e4 LT |
357 | STATIC xfs_lsn_t |
358 | xfs_qm_qoffend_logitem_committed( | |
7bfa31d8 CH |
359 | struct xfs_log_item *lip, |
360 | xfs_lsn_t lsn) | |
1da177e4 | 361 | { |
7bfa31d8 CH |
362 | struct xfs_qoff_logitem *qfe = QOFF_ITEM(lip); |
363 | struct xfs_qoff_logitem *qfs = qfe->qql_start_lip; | |
364 | struct xfs_ail *ailp = qfs->qql_item.li_ailp; | |
1da177e4 | 365 | |
1da177e4 LT |
366 | /* |
367 | * Delete the qoff-start logitem from the AIL. | |
783a2f65 | 368 | * xfs_trans_ail_delete() drops the AIL lock. |
1da177e4 | 369 | */ |
7bfa31d8 | 370 | spin_lock(&ailp->xa_lock); |
04913fdd | 371 | xfs_trans_ail_delete(ailp, &qfs->qql_item, SHUTDOWN_LOG_IO_ERROR); |
7bfa31d8 | 372 | |
b1c5ebb2 DC |
373 | kmem_free(qfs->qql_item.li_lv_shadow); |
374 | kmem_free(lip->li_lv_shadow); | |
f0e2d93c DV |
375 | kmem_free(qfs); |
376 | kmem_free(qfe); | |
1da177e4 LT |
377 | return (xfs_lsn_t)-1; |
378 | } | |
379 | ||
380 | /* | |
381 | * XXX rcc - don't know quite what to do with this. I think we can | |
382 | * just ignore it. The only time that isn't the case is if we allow | |
383 | * the client to somehow see that quotas have been turned off in which | |
384 | * we can't allow that to get back until the quotaoff hits the disk. | |
385 | * So how would that happen? Also, do we need different routines for | |
386 | * quotaoff start and quotaoff end? I suspect the answer is yes but | |
387 | * to be sure, I need to look at the recovery code and see how quota off | |
388 | * recovery is handled (do we roll forward or back or do something else). | |
389 | * If we roll forwards or backwards, then we need two separate routines, | |
390 | * one that does nothing and one that stamps in the lsn that matters | |
391 | * (truly makes the quotaoff irrevocable). If we do something else, | |
392 | * then maybe we don't need two. | |
393 | */ | |
1da177e4 | 394 | STATIC void |
7bfa31d8 CH |
395 | xfs_qm_qoff_logitem_committing( |
396 | struct xfs_log_item *lip, | |
397 | xfs_lsn_t commit_lsn) | |
1da177e4 | 398 | { |
1da177e4 LT |
399 | } |
400 | ||
272e42b2 | 401 | static const struct xfs_item_ops xfs_qm_qoffend_logitem_ops = { |
7bfa31d8 CH |
402 | .iop_size = xfs_qm_qoff_logitem_size, |
403 | .iop_format = xfs_qm_qoff_logitem_format, | |
404 | .iop_pin = xfs_qm_qoff_logitem_pin, | |
405 | .iop_unpin = xfs_qm_qoff_logitem_unpin, | |
7bfa31d8 CH |
406 | .iop_unlock = xfs_qm_qoff_logitem_unlock, |
407 | .iop_committed = xfs_qm_qoffend_logitem_committed, | |
408 | .iop_push = xfs_qm_qoff_logitem_push, | |
409 | .iop_committing = xfs_qm_qoff_logitem_committing | |
1da177e4 LT |
410 | }; |
411 | ||
412 | /* | |
413 | * This is the ops vector shared by all quotaoff-start log items. | |
414 | */ | |
272e42b2 | 415 | static const struct xfs_item_ops xfs_qm_qoff_logitem_ops = { |
7bfa31d8 CH |
416 | .iop_size = xfs_qm_qoff_logitem_size, |
417 | .iop_format = xfs_qm_qoff_logitem_format, | |
418 | .iop_pin = xfs_qm_qoff_logitem_pin, | |
419 | .iop_unpin = xfs_qm_qoff_logitem_unpin, | |
7bfa31d8 CH |
420 | .iop_unlock = xfs_qm_qoff_logitem_unlock, |
421 | .iop_committed = xfs_qm_qoff_logitem_committed, | |
422 | .iop_push = xfs_qm_qoff_logitem_push, | |
423 | .iop_committing = xfs_qm_qoff_logitem_committing | |
1da177e4 LT |
424 | }; |
425 | ||
426 | /* | |
427 | * Allocate and initialize an quotaoff item of the correct quota type(s). | |
428 | */ | |
7bfa31d8 | 429 | struct xfs_qoff_logitem * |
1da177e4 | 430 | xfs_qm_qoff_logitem_init( |
7bfa31d8 CH |
431 | struct xfs_mount *mp, |
432 | struct xfs_qoff_logitem *start, | |
433 | uint flags) | |
1da177e4 | 434 | { |
7bfa31d8 | 435 | struct xfs_qoff_logitem *qf; |
1da177e4 | 436 | |
7bfa31d8 | 437 | qf = kmem_zalloc(sizeof(struct xfs_qoff_logitem), KM_SLEEP); |
1da177e4 | 438 | |
43f5efc5 DC |
439 | xfs_log_item_init(mp, &qf->qql_item, XFS_LI_QUOTAOFF, start ? |
440 | &xfs_qm_qoffend_logitem_ops : &xfs_qm_qoff_logitem_ops); | |
1da177e4 | 441 | qf->qql_item.li_mountp = mp; |
1da177e4 | 442 | qf->qql_start_lip = start; |
ffda4e83 | 443 | qf->qql_flags = flags; |
7bfa31d8 | 444 | return qf; |
1da177e4 | 445 | } |