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Linux 3.16-rc2
[linux/fpc-iii.git] / fs / xfs / xfs_trans_dquot.c
blob41172861e857bf8c487f7adf3037aad0214b1681
1 /*
2 * Copyright (c) 2000-2002 Silicon Graphics, Inc.
3 * All Rights Reserved.
4 *
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
7 * published by the Free Software Foundation.
8 *
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.
13 *
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
17 */
18 #include "xfs.h"
19 #include "xfs_fs.h"
20 #include "xfs_shared.h"
21 #include "xfs_format.h"
22 #include "xfs_log_format.h"
23 #include "xfs_trans_resv.h"
24 #include "xfs_sb.h"
25 #include "xfs_ag.h"
26 #include "xfs_mount.h"
27 #include "xfs_inode.h"
28 #include "xfs_error.h"
29 #include "xfs_trans.h"
30 #include "xfs_trans_priv.h"
31 #include "xfs_quota.h"
32 #include "xfs_qm.h"
33
34 STATIC void xfs_trans_alloc_dqinfo(xfs_trans_t *);
35
36 /*
37 * Add the locked dquot to the transaction.
38 * The dquot must be locked, and it cannot be associated with any
39 * transaction.
40 */
41 void
42 xfs_trans_dqjoin(
43 xfs_trans_t *tp,
44 xfs_dquot_t *dqp)
45 {
46 ASSERT(dqp->q_transp != tp);
47 ASSERT(XFS_DQ_IS_LOCKED(dqp));
48 ASSERT(dqp->q_logitem.qli_dquot == dqp);
49
50 /*
51 * Get a log_item_desc to point at the new item.
52 */
53 xfs_trans_add_item(tp, &dqp->q_logitem.qli_item);
54
55 /*
56 * Initialize d_transp so we can later determine if this dquot is
57 * associated with this transaction.
58 */
59 dqp->q_transp = tp;
60 }
61
62
63 /*
64 * This is called to mark the dquot as needing
65 * to be logged when the transaction is committed. The dquot must
66 * already be associated with the given transaction.
67 * Note that it marks the entire transaction as dirty. In the ordinary
68 * case, this gets called via xfs_trans_commit, after the transaction
69 * is already dirty. However, there's nothing stop this from getting
70 * called directly, as done by xfs_qm_scall_setqlim. Hence, the TRANS_DIRTY
71 * flag.
72 */
73 void
74 xfs_trans_log_dquot(
75 xfs_trans_t *tp,
76 xfs_dquot_t *dqp)
77 {
78 ASSERT(dqp->q_transp == tp);
79 ASSERT(XFS_DQ_IS_LOCKED(dqp));
80
81 tp->t_flags |= XFS_TRANS_DIRTY;
82 dqp->q_logitem.qli_item.li_desc->lid_flags |= XFS_LID_DIRTY;
83 }
84
85 /*
86 * Carry forward whatever is left of the quota blk reservation to
87 * the spanky new transaction
88 */
89 void
90 xfs_trans_dup_dqinfo(
91 xfs_trans_t *otp,
92 xfs_trans_t *ntp)
93 {
94 xfs_dqtrx_t *oq, *nq;
95 int i,j;
96 xfs_dqtrx_t *oqa, *nqa;
97
98 if (!otp->t_dqinfo)
99 return;
100
101 xfs_trans_alloc_dqinfo(ntp);
102
103 /*
104 * Because the quota blk reservation is carried forward,
105 * it is also necessary to carry forward the DQ_DIRTY flag.
106 */
107 if(otp->t_flags & XFS_TRANS_DQ_DIRTY)
108 ntp->t_flags |= XFS_TRANS_DQ_DIRTY;
109
110 for (j = 0; j < XFS_QM_TRANS_DQTYPES; j++) {
111 oqa = otp->t_dqinfo->dqs[j];
112 nqa = ntp->t_dqinfo->dqs[j];
113 for (i = 0; i < XFS_QM_TRANS_MAXDQS; i++) {
114 if (oqa[i].qt_dquot == NULL)
115 break;
116 oq = &oqa[i];
117 nq = &nqa[i];
118
119 nq->qt_dquot = oq->qt_dquot;
120 nq->qt_bcount_delta = nq->qt_icount_delta = 0;
121 nq->qt_rtbcount_delta = 0;
122
123 /*
124 * Transfer whatever is left of the reservations.
125 */
126 nq->qt_blk_res = oq->qt_blk_res - oq->qt_blk_res_used;
127 oq->qt_blk_res = oq->qt_blk_res_used;
128
129 nq->qt_rtblk_res = oq->qt_rtblk_res -
130 oq->qt_rtblk_res_used;
131 oq->qt_rtblk_res = oq->qt_rtblk_res_used;
132
133 nq->qt_ino_res = oq->qt_ino_res - oq->qt_ino_res_used;
134 oq->qt_ino_res = oq->qt_ino_res_used;
135
136 }
137 }
138 }
139
140 /*
141 * Wrap around mod_dquot to account for both user and group quotas.
142 */
143 void
144 xfs_trans_mod_dquot_byino(
145 xfs_trans_t *tp,
146 xfs_inode_t *ip,
147 uint field,
148 long delta)
149 {
150 xfs_mount_t *mp = tp->t_mountp;
151
152 if (!XFS_IS_QUOTA_RUNNING(mp) ||
153 !XFS_IS_QUOTA_ON(mp) ||
154 xfs_is_quota_inode(&mp->m_sb, ip->i_ino))
155 return;
156
157 if (tp->t_dqinfo == NULL)
158 xfs_trans_alloc_dqinfo(tp);
159
160 if (XFS_IS_UQUOTA_ON(mp) && ip->i_udquot)
161 (void) xfs_trans_mod_dquot(tp, ip->i_udquot, field, delta);
162 if (XFS_IS_GQUOTA_ON(mp) && ip->i_gdquot)
163 (void) xfs_trans_mod_dquot(tp, ip->i_gdquot, field, delta);
164 if (XFS_IS_PQUOTA_ON(mp) && ip->i_pdquot)
165 (void) xfs_trans_mod_dquot(tp, ip->i_pdquot, field, delta);
166 }
167
168 STATIC struct xfs_dqtrx *
169 xfs_trans_get_dqtrx(
170 struct xfs_trans *tp,
171 struct xfs_dquot *dqp)
172 {
173 int i;
174 struct xfs_dqtrx *qa;
175
176 if (XFS_QM_ISUDQ(dqp))
177 qa = tp->t_dqinfo->dqs[XFS_QM_TRANS_USR];
178 else if (XFS_QM_ISGDQ(dqp))
179 qa = tp->t_dqinfo->dqs[XFS_QM_TRANS_GRP];
180 else if (XFS_QM_ISPDQ(dqp))
181 qa = tp->t_dqinfo->dqs[XFS_QM_TRANS_PRJ];
182 else
183 return NULL;
184
185 for (i = 0; i < XFS_QM_TRANS_MAXDQS; i++) {
186 if (qa[i].qt_dquot == NULL ||
187 qa[i].qt_dquot == dqp)
188 return &qa[i];
189 }
190
191 return NULL;
192 }
193
194 /*
195 * Make the changes in the transaction structure.
196 * The moral equivalent to xfs_trans_mod_sb().
197 * We don't touch any fields in the dquot, so we don't care
198 * if it's locked or not (most of the time it won't be).
199 */
200 void
201 xfs_trans_mod_dquot(
202 xfs_trans_t *tp,
203 xfs_dquot_t *dqp,
204 uint field,
205 long delta)
206 {
207 xfs_dqtrx_t *qtrx;
208
209 ASSERT(tp);
210 ASSERT(XFS_IS_QUOTA_RUNNING(tp->t_mountp));
211 qtrx = NULL;
212
213 if (tp->t_dqinfo == NULL)
214 xfs_trans_alloc_dqinfo(tp);
215 /*
216 * Find either the first free slot or the slot that belongs
217 * to this dquot.
218 */
219 qtrx = xfs_trans_get_dqtrx(tp, dqp);
220 ASSERT(qtrx);
221 if (qtrx->qt_dquot == NULL)
222 qtrx->qt_dquot = dqp;
223
224 switch (field) {
225
226 /*
227 * regular disk blk reservation
228 */
229 case XFS_TRANS_DQ_RES_BLKS:
230 qtrx->qt_blk_res += (ulong)delta;
231 break;
232
233 /*
234 * inode reservation
235 */
236 case XFS_TRANS_DQ_RES_INOS:
237 qtrx->qt_ino_res += (ulong)delta;
238 break;
239
240 /*
241 * disk blocks used.
242 */
243 case XFS_TRANS_DQ_BCOUNT:
244 if (qtrx->qt_blk_res && delta > 0) {
245 qtrx->qt_blk_res_used += (ulong)delta;
246 ASSERT(qtrx->qt_blk_res >= qtrx->qt_blk_res_used);
247 }
248 qtrx->qt_bcount_delta += delta;
249 break;
250
251 case XFS_TRANS_DQ_DELBCOUNT:
252 qtrx->qt_delbcnt_delta += delta;
253 break;
254
255 /*
256 * Inode Count
257 */
258 case XFS_TRANS_DQ_ICOUNT:
259 if (qtrx->qt_ino_res && delta > 0) {
260 qtrx->qt_ino_res_used += (ulong)delta;
261 ASSERT(qtrx->qt_ino_res >= qtrx->qt_ino_res_used);
262 }
263 qtrx->qt_icount_delta += delta;
264 break;
265
266 /*
267 * rtblk reservation
268 */
269 case XFS_TRANS_DQ_RES_RTBLKS:
270 qtrx->qt_rtblk_res += (ulong)delta;
271 break;
272
273 /*
274 * rtblk count
275 */
276 case XFS_TRANS_DQ_RTBCOUNT:
277 if (qtrx->qt_rtblk_res && delta > 0) {
278 qtrx->qt_rtblk_res_used += (ulong)delta;
279 ASSERT(qtrx->qt_rtblk_res >= qtrx->qt_rtblk_res_used);
280 }
281 qtrx->qt_rtbcount_delta += delta;
282 break;
283
284 case XFS_TRANS_DQ_DELRTBCOUNT:
285 qtrx->qt_delrtb_delta += delta;
286 break;
287
288 default:
289 ASSERT(0);
290 }
291 tp->t_flags |= XFS_TRANS_DQ_DIRTY;
292 }
293
294
295 /*
296 * Given an array of dqtrx structures, lock all the dquots associated and join
297 * them to the transaction, provided they have been modified. We know that the
298 * highest number of dquots of one type - usr, grp and prj - involved in a
299 * transaction is 3 so we don't need to make this very generic.
300 */
301 STATIC void
302 xfs_trans_dqlockedjoin(
303 xfs_trans_t *tp,
304 xfs_dqtrx_t *q)
305 {
306 ASSERT(q[0].qt_dquot != NULL);
307 if (q[1].qt_dquot == NULL) {
308 xfs_dqlock(q[0].qt_dquot);
309 xfs_trans_dqjoin(tp, q[0].qt_dquot);
310 } else {
311 ASSERT(XFS_QM_TRANS_MAXDQS == 2);
312 xfs_dqlock2(q[0].qt_dquot, q[1].qt_dquot);
313 xfs_trans_dqjoin(tp, q[0].qt_dquot);
314 xfs_trans_dqjoin(tp, q[1].qt_dquot);
315 }
316 }
317
318
319 /*
320 * Called by xfs_trans_commit() and similar in spirit to
321 * xfs_trans_apply_sb_deltas().
322 * Go thru all the dquots belonging to this transaction and modify the
323 * INCORE dquot to reflect the actual usages.
324 * Unreserve just the reservations done by this transaction.
325 * dquot is still left locked at exit.
326 */
327 void
328 xfs_trans_apply_dquot_deltas(
329 struct xfs_trans *tp)
330 {
331 int i, j;
332 struct xfs_dquot *dqp;
333 struct xfs_dqtrx *qtrx, *qa;
334 struct xfs_disk_dquot *d;
335 long totalbdelta;
336 long totalrtbdelta;
337
338 if (!(tp->t_flags & XFS_TRANS_DQ_DIRTY))
339 return;
340
341 ASSERT(tp->t_dqinfo);
342 for (j = 0; j < XFS_QM_TRANS_DQTYPES; j++) {
343 qa = tp->t_dqinfo->dqs[j];
344 if (qa[0].qt_dquot == NULL)
345 continue;
346
347 /*
348 * Lock all of the dquots and join them to the transaction.
349 */
350 xfs_trans_dqlockedjoin(tp, qa);
351
352 for (i = 0; i < XFS_QM_TRANS_MAXDQS; i++) {
353 qtrx = &qa[i];
354 /*
355 * The array of dquots is filled
356 * sequentially, not sparsely.
357 */
358 if ((dqp = qtrx->qt_dquot) == NULL)
359 break;
360
361 ASSERT(XFS_DQ_IS_LOCKED(dqp));
362 ASSERT(dqp->q_transp == tp);
363
364 /*
365 * adjust the actual number of blocks used
366 */
367 d = &dqp->q_core;
368
369 /*
370 * The issue here is - sometimes we don't make a blkquota
371 * reservation intentionally to be fair to users
372 * (when the amount is small). On the other hand,
373 * delayed allocs do make reservations, but that's
374 * outside of a transaction, so we have no
375 * idea how much was really reserved.
376 * So, here we've accumulated delayed allocation blks and
377 * non-delay blks. The assumption is that the
378 * delayed ones are always reserved (outside of a
379 * transaction), and the others may or may not have
380 * quota reservations.
381 */
382 totalbdelta = qtrx->qt_bcount_delta +
383 qtrx->qt_delbcnt_delta;
384 totalrtbdelta = qtrx->qt_rtbcount_delta +
385 qtrx->qt_delrtb_delta;
386 #ifdef DEBUG
387 if (totalbdelta < 0)
388 ASSERT(be64_to_cpu(d->d_bcount) >=
389 -totalbdelta);
390
391 if (totalrtbdelta < 0)
392 ASSERT(be64_to_cpu(d->d_rtbcount) >=
393 -totalrtbdelta);
394
395 if (qtrx->qt_icount_delta < 0)
396 ASSERT(be64_to_cpu(d->d_icount) >=
397 -qtrx->qt_icount_delta);
398 #endif
399 if (totalbdelta)
400 be64_add_cpu(&d->d_bcount, (xfs_qcnt_t)totalbdelta);
401
402 if (qtrx->qt_icount_delta)
403 be64_add_cpu(&d->d_icount, (xfs_qcnt_t)qtrx->qt_icount_delta);
404
405 if (totalrtbdelta)
406 be64_add_cpu(&d->d_rtbcount, (xfs_qcnt_t)totalrtbdelta);
407
408 /*
409 * Get any default limits in use.
410 * Start/reset the timer(s) if needed.
411 */
412 if (d->d_id) {
413 xfs_qm_adjust_dqlimits(tp->t_mountp, dqp);
414 xfs_qm_adjust_dqtimers(tp->t_mountp, d);
415 }
416
417 dqp->dq_flags |= XFS_DQ_DIRTY;
418 /*
419 * add this to the list of items to get logged
420 */
421 xfs_trans_log_dquot(tp, dqp);
422 /*
423 * Take off what's left of the original reservation.
424 * In case of delayed allocations, there's no
425 * reservation that a transaction structure knows of.
426 */
427 if (qtrx->qt_blk_res != 0) {
428 if (qtrx->qt_blk_res != qtrx->qt_blk_res_used) {
429 if (qtrx->qt_blk_res >
430 qtrx->qt_blk_res_used)
431 dqp->q_res_bcount -= (xfs_qcnt_t)
432 (qtrx->qt_blk_res -
433 qtrx->qt_blk_res_used);
434 else
435 dqp->q_res_bcount -= (xfs_qcnt_t)
436 (qtrx->qt_blk_res_used -
437 qtrx->qt_blk_res);
438 }
439 } else {
440 /*
441 * These blks were never reserved, either inside
442 * a transaction or outside one (in a delayed
443 * allocation). Also, this isn't always a
444 * negative number since we sometimes
445 * deliberately skip quota reservations.
446 */
447 if (qtrx->qt_bcount_delta) {
448 dqp->q_res_bcount +=
449 (xfs_qcnt_t)qtrx->qt_bcount_delta;
450 }
451 }
452 /*
453 * Adjust the RT reservation.
454 */
455 if (qtrx->qt_rtblk_res != 0) {
456 if (qtrx->qt_rtblk_res != qtrx->qt_rtblk_res_used) {
457 if (qtrx->qt_rtblk_res >
458 qtrx->qt_rtblk_res_used)
459 dqp->q_res_rtbcount -= (xfs_qcnt_t)
460 (qtrx->qt_rtblk_res -
461 qtrx->qt_rtblk_res_used);
462 else
463 dqp->q_res_rtbcount -= (xfs_qcnt_t)
464 (qtrx->qt_rtblk_res_used -
465 qtrx->qt_rtblk_res);
466 }
467 } else {
468 if (qtrx->qt_rtbcount_delta)
469 dqp->q_res_rtbcount +=
470 (xfs_qcnt_t)qtrx->qt_rtbcount_delta;
471 }
472
473 /*
474 * Adjust the inode reservation.
475 */
476 if (qtrx->qt_ino_res != 0) {
477 ASSERT(qtrx->qt_ino_res >=
478 qtrx->qt_ino_res_used);
479 if (qtrx->qt_ino_res > qtrx->qt_ino_res_used)
480 dqp->q_res_icount -= (xfs_qcnt_t)
481 (qtrx->qt_ino_res -
482 qtrx->qt_ino_res_used);
483 } else {
484 if (qtrx->qt_icount_delta)
485 dqp->q_res_icount +=
486 (xfs_qcnt_t)qtrx->qt_icount_delta;
487 }
488
489 ASSERT(dqp->q_res_bcount >=
490 be64_to_cpu(dqp->q_core.d_bcount));
491 ASSERT(dqp->q_res_icount >=
492 be64_to_cpu(dqp->q_core.d_icount));
493 ASSERT(dqp->q_res_rtbcount >=
494 be64_to_cpu(dqp->q_core.d_rtbcount));
495 }
496 }
497 }
498
499 /*
500 * Release the reservations, and adjust the dquots accordingly.
501 * This is called only when the transaction is being aborted. If by
502 * any chance we have done dquot modifications incore (ie. deltas) already,
503 * we simply throw those away, since that's the expected behavior
504 * when a transaction is curtailed without a commit.
505 */
506 void
507 xfs_trans_unreserve_and_mod_dquots(
508 xfs_trans_t *tp)
509 {
510 int i, j;
511 xfs_dquot_t *dqp;
512 xfs_dqtrx_t *qtrx, *qa;
513 bool locked;
514
515 if (!tp->t_dqinfo || !(tp->t_flags & XFS_TRANS_DQ_DIRTY))
516 return;
517
518 for (j = 0; j < XFS_QM_TRANS_DQTYPES; j++) {
519 qa = tp->t_dqinfo->dqs[j];
520
521 for (i = 0; i < XFS_QM_TRANS_MAXDQS; i++) {
522 qtrx = &qa[i];
523 /*
524 * We assume that the array of dquots is filled
525 * sequentially, not sparsely.
526 */
527 if ((dqp = qtrx->qt_dquot) == NULL)
528 break;
529 /*
530 * Unreserve the original reservation. We don't care
531 * about the number of blocks used field, or deltas.
532 * Also we don't bother to zero the fields.
533 */
534 locked = false;
535 if (qtrx->qt_blk_res) {
536 xfs_dqlock(dqp);
537 locked = true;
538 dqp->q_res_bcount -=
539 (xfs_qcnt_t)qtrx->qt_blk_res;
540 }
541 if (qtrx->qt_ino_res) {
542 if (!locked) {
543 xfs_dqlock(dqp);
544 locked = true;
545 }
546 dqp->q_res_icount -=
547 (xfs_qcnt_t)qtrx->qt_ino_res;
548 }
549
550 if (qtrx->qt_rtblk_res) {
551 if (!locked) {
552 xfs_dqlock(dqp);
553 locked = true;
554 }
555 dqp->q_res_rtbcount -=
556 (xfs_qcnt_t)qtrx->qt_rtblk_res;
557 }
558 if (locked)
559 xfs_dqunlock(dqp);
560
561 }
562 }
563 }
564
565 STATIC void
566 xfs_quota_warn(
567 struct xfs_mount *mp,
568 struct xfs_dquot *dqp,
569 int type)
570 {
571 /* no warnings for project quotas - we just return ENOSPC later */
572 if (dqp->dq_flags & XFS_DQ_PROJ)
573 return;
574 quota_send_warning(make_kqid(&init_user_ns,
575 (dqp->dq_flags & XFS_DQ_USER) ?
576 USRQUOTA : GRPQUOTA,
577 be32_to_cpu(dqp->q_core.d_id)),
578 mp->m_super->s_dev, type);
579 }
580
581 /*
582 * This reserves disk blocks and inodes against a dquot.
583 * Flags indicate if the dquot is to be locked here and also
584 * if the blk reservation is for RT or regular blocks.
585 * Sending in XFS_QMOPT_FORCE_RES flag skips the quota check.
586 */
587 STATIC int
588 xfs_trans_dqresv(
589 xfs_trans_t *tp,
590 xfs_mount_t *mp,
591 xfs_dquot_t *dqp,
592 long nblks,
593 long ninos,
594 uint flags)
595 {
596 xfs_qcnt_t hardlimit;
597 xfs_qcnt_t softlimit;
598 time_t timer;
599 xfs_qwarncnt_t warns;
600 xfs_qwarncnt_t warnlimit;
601 xfs_qcnt_t total_count;
602 xfs_qcnt_t *resbcountp;
603 xfs_quotainfo_t *q = mp->m_quotainfo;
604
605
606 xfs_dqlock(dqp);
607
608 if (flags & XFS_TRANS_DQ_RES_BLKS) {
609 hardlimit = be64_to_cpu(dqp->q_core.d_blk_hardlimit);
610 if (!hardlimit)
611 hardlimit = q->qi_bhardlimit;
612 softlimit = be64_to_cpu(dqp->q_core.d_blk_softlimit);
613 if (!softlimit)
614 softlimit = q->qi_bsoftlimit;
615 timer = be32_to_cpu(dqp->q_core.d_btimer);
616 warns = be16_to_cpu(dqp->q_core.d_bwarns);
617 warnlimit = dqp->q_mount->m_quotainfo->qi_bwarnlimit;
618 resbcountp = &dqp->q_res_bcount;
619 } else {
620 ASSERT(flags & XFS_TRANS_DQ_RES_RTBLKS);
621 hardlimit = be64_to_cpu(dqp->q_core.d_rtb_hardlimit);
622 if (!hardlimit)
623 hardlimit = q->qi_rtbhardlimit;
624 softlimit = be64_to_cpu(dqp->q_core.d_rtb_softlimit);
625 if (!softlimit)
626 softlimit = q->qi_rtbsoftlimit;
627 timer = be32_to_cpu(dqp->q_core.d_rtbtimer);
628 warns = be16_to_cpu(dqp->q_core.d_rtbwarns);
629 warnlimit = dqp->q_mount->m_quotainfo->qi_rtbwarnlimit;
630 resbcountp = &dqp->q_res_rtbcount;
631 }
632
633 if ((flags & XFS_QMOPT_FORCE_RES) == 0 &&
634 dqp->q_core.d_id &&
635 ((XFS_IS_UQUOTA_ENFORCED(dqp->q_mount) && XFS_QM_ISUDQ(dqp)) ||
636 (XFS_IS_GQUOTA_ENFORCED(dqp->q_mount) && XFS_QM_ISGDQ(dqp)) ||
637 (XFS_IS_PQUOTA_ENFORCED(dqp->q_mount) && XFS_QM_ISPDQ(dqp)))) {
638 if (nblks > 0) {
639 /*
640 * dquot is locked already. See if we'd go over the
641 * hardlimit or exceed the timelimit if we allocate
642 * nblks.
643 */
644 total_count = *resbcountp + nblks;
645 if (hardlimit && total_count > hardlimit) {
646 xfs_quota_warn(mp, dqp, QUOTA_NL_BHARDWARN);
647 goto error_return;
648 }
649 if (softlimit && total_count > softlimit) {
650 if ((timer != 0 && get_seconds() > timer) ||
651 (warns != 0 && warns >= warnlimit)) {
652 xfs_quota_warn(mp, dqp,
653 QUOTA_NL_BSOFTLONGWARN);
654 goto error_return;
655 }
656
657 xfs_quota_warn(mp, dqp, QUOTA_NL_BSOFTWARN);
658 }
659 }
660 if (ninos > 0) {
661 total_count = be64_to_cpu(dqp->q_core.d_icount) + ninos;
662 timer = be32_to_cpu(dqp->q_core.d_itimer);
663 warns = be16_to_cpu(dqp->q_core.d_iwarns);
664 warnlimit = dqp->q_mount->m_quotainfo->qi_iwarnlimit;
665 hardlimit = be64_to_cpu(dqp->q_core.d_ino_hardlimit);
666 if (!hardlimit)
667 hardlimit = q->qi_ihardlimit;
668 softlimit = be64_to_cpu(dqp->q_core.d_ino_softlimit);
669 if (!softlimit)
670 softlimit = q->qi_isoftlimit;
671
672 if (hardlimit && total_count > hardlimit) {
673 xfs_quota_warn(mp, dqp, QUOTA_NL_IHARDWARN);
674 goto error_return;
675 }
676 if (softlimit && total_count > softlimit) {
677 if ((timer != 0 && get_seconds() > timer) ||
678 (warns != 0 && warns >= warnlimit)) {
679 xfs_quota_warn(mp, dqp,
680 QUOTA_NL_ISOFTLONGWARN);
681 goto error_return;
682 }
683 xfs_quota_warn(mp, dqp, QUOTA_NL_ISOFTWARN);
684 }
685 }
686 }
687
688 /*
689 * Change the reservation, but not the actual usage.
690 * Note that q_res_bcount = q_core.d_bcount + resv
691 */
692 (*resbcountp) += (xfs_qcnt_t)nblks;
693 if (ninos != 0)
694 dqp->q_res_icount += (xfs_qcnt_t)ninos;
695
696 /*
697 * note the reservation amt in the trans struct too,
698 * so that the transaction knows how much was reserved by
699 * it against this particular dquot.
700 * We don't do this when we are reserving for a delayed allocation,
701 * because we don't have the luxury of a transaction envelope then.
702 */
703 if (tp) {
704 ASSERT(tp->t_dqinfo);
705 ASSERT(flags & XFS_QMOPT_RESBLK_MASK);
706 if (nblks != 0)
707 xfs_trans_mod_dquot(tp, dqp,
708 flags & XFS_QMOPT_RESBLK_MASK,
709 nblks);
710 if (ninos != 0)
711 xfs_trans_mod_dquot(tp, dqp,
712 XFS_TRANS_DQ_RES_INOS,
713 ninos);
714 }
715 ASSERT(dqp->q_res_bcount >= be64_to_cpu(dqp->q_core.d_bcount));
716 ASSERT(dqp->q_res_rtbcount >= be64_to_cpu(dqp->q_core.d_rtbcount));
717 ASSERT(dqp->q_res_icount >= be64_to_cpu(dqp->q_core.d_icount));
718
719 xfs_dqunlock(dqp);
720 return 0;
721
722 error_return:
723 xfs_dqunlock(dqp);
724 if (flags & XFS_QMOPT_ENOSPC)
725 return ENOSPC;
726 return EDQUOT;
727 }
728
729
730 /*
731 * Given dquot(s), make disk block and/or inode reservations against them.
732 * The fact that this does the reservation against user, group and
733 * project quotas is important, because this follows a all-or-nothing
734 * approach.
735 *
736 * flags = XFS_QMOPT_FORCE_RES evades limit enforcement. Used by chown.
737 * XFS_QMOPT_ENOSPC returns ENOSPC not EDQUOT. Used by pquota.
738 * XFS_TRANS_DQ_RES_BLKS reserves regular disk blocks
739 * XFS_TRANS_DQ_RES_RTBLKS reserves realtime disk blocks
740 * dquots are unlocked on return, if they were not locked by caller.
741 */
742 int
743 xfs_trans_reserve_quota_bydquots(
744 struct xfs_trans *tp,
745 struct xfs_mount *mp,
746 struct xfs_dquot *udqp,
747 struct xfs_dquot *gdqp,
748 struct xfs_dquot *pdqp,
749 long nblks,
750 long ninos,
751 uint flags)
752 {
753 int error;
754
755 if (!XFS_IS_QUOTA_RUNNING(mp) || !XFS_IS_QUOTA_ON(mp))
756 return 0;
757
758 if (tp && tp->t_dqinfo == NULL)
759 xfs_trans_alloc_dqinfo(tp);
760
761 ASSERT(flags & XFS_QMOPT_RESBLK_MASK);
762
763 if (udqp) {
764 error = xfs_trans_dqresv(tp, mp, udqp, nblks, ninos,
765 (flags & ~XFS_QMOPT_ENOSPC));
766 if (error)
767 return error;
768 }
769
770 if (gdqp) {
771 error = xfs_trans_dqresv(tp, mp, gdqp, nblks, ninos, flags);
772 if (error)
773 goto unwind_usr;
774 }
775
776 if (pdqp) {
777 error = xfs_trans_dqresv(tp, mp, pdqp, nblks, ninos, flags);
778 if (error)
779 goto unwind_grp;
780 }
781
782 /*
783 * Didn't change anything critical, so, no need to log
784 */
785 return 0;
786
787 unwind_grp:
788 flags |= XFS_QMOPT_FORCE_RES;
789 if (gdqp)
790 xfs_trans_dqresv(tp, mp, gdqp, -nblks, -ninos, flags);
791 unwind_usr:
792 flags |= XFS_QMOPT_FORCE_RES;
793 if (udqp)
794 xfs_trans_dqresv(tp, mp, udqp, -nblks, -ninos, flags);
795 return error;
796 }
797
798
799 /*
800 * Lock the dquot and change the reservation if we can.
801 * This doesn't change the actual usage, just the reservation.
802 * The inode sent in is locked.
803 */
804 int
805 xfs_trans_reserve_quota_nblks(
806 struct xfs_trans *tp,
807 struct xfs_inode *ip,
808 long nblks,
809 long ninos,
810 uint flags)
811 {
812 struct xfs_mount *mp = ip->i_mount;
813
814 if (!XFS_IS_QUOTA_RUNNING(mp) || !XFS_IS_QUOTA_ON(mp))
815 return 0;
816 if (XFS_IS_PQUOTA_ON(mp))
817 flags |= XFS_QMOPT_ENOSPC;
818
819 ASSERT(!xfs_is_quota_inode(&mp->m_sb, ip->i_ino));
820
821 ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL));
822 ASSERT((flags & ~(XFS_QMOPT_FORCE_RES | XFS_QMOPT_ENOSPC)) ==
823 XFS_TRANS_DQ_RES_RTBLKS ||
824 (flags & ~(XFS_QMOPT_FORCE_RES | XFS_QMOPT_ENOSPC)) ==
825 XFS_TRANS_DQ_RES_BLKS);
826
827 /*
828 * Reserve nblks against these dquots, with trans as the mediator.
829 */
830 return xfs_trans_reserve_quota_bydquots(tp, mp,
831 ip->i_udquot, ip->i_gdquot,
832 ip->i_pdquot,
833 nblks, ninos, flags);
834 }
835
836 /*
837 * This routine is called to allocate a quotaoff log item.
838 */
839 xfs_qoff_logitem_t *
840 xfs_trans_get_qoff_item(
841 xfs_trans_t *tp,
842 xfs_qoff_logitem_t *startqoff,
843 uint flags)
844 {
845 xfs_qoff_logitem_t *q;
846
847 ASSERT(tp != NULL);
848
849 q = xfs_qm_qoff_logitem_init(tp->t_mountp, startqoff, flags);
850 ASSERT(q != NULL);
851
852 /*
853 * Get a log_item_desc to point at the new item.
854 */
855 xfs_trans_add_item(tp, &q->qql_item);
856 return q;
857 }
858
859
860 /*
861 * This is called to mark the quotaoff logitem as needing
862 * to be logged when the transaction is committed. The logitem must
863 * already be associated with the given transaction.
864 */
865 void
866 xfs_trans_log_quotaoff_item(
867 xfs_trans_t *tp,
868 xfs_qoff_logitem_t *qlp)
869 {
870 tp->t_flags |= XFS_TRANS_DIRTY;
871 qlp->qql_item.li_desc->lid_flags |= XFS_LID_DIRTY;
872 }
873
874 STATIC void
875 xfs_trans_alloc_dqinfo(
876 xfs_trans_t *tp)
877 {
878 tp->t_dqinfo = kmem_zone_zalloc(xfs_qm_dqtrxzone, KM_SLEEP);
879 }
880
881 void
882 xfs_trans_free_dqinfo(
883 xfs_trans_t *tp)
884 {
885 if (!tp->t_dqinfo)
886 return;
887 kmem_zone_free(xfs_qm_dqtrxzone, tp->t_dqinfo);
888 tp->t_dqinfo = NULL;
889 }
Linux with added FPC-III support