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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_log.h"
21#include "xfs_trans.h"
22#include "xfs_sb.h"
23#include "xfs_ag.h"
24#include "xfs_alloc.h"
25#include "xfs_quota.h"
26#include "xfs_mount.h"
27#include "xfs_bmap_btree.h"
28#include "xfs_inode.h"
29#include "xfs_itable.h"
30#include "xfs_bmap.h"
31#include "xfs_rtalloc.h"
32#include "xfs_error.h"
33#include "xfs_attr.h"
34#include "xfs_buf_item.h"
35#include "xfs_trans_priv.h"
36#include "xfs_qm.h"
37
38STATIC void xfs_trans_alloc_dqinfo(xfs_trans_t *);
39
40/*
41 * Add the locked dquot to the transaction.
42 * The dquot must be locked, and it cannot be associated with any
43 * transaction.
44 */
45void
46xfs_trans_dqjoin(
47 xfs_trans_t *tp,
48 xfs_dquot_t *dqp)
49{
50 ASSERT(dqp->q_transp != tp);
51 ASSERT(XFS_DQ_IS_LOCKED(dqp));
52 ASSERT(dqp->q_logitem.qli_dquot == dqp);
53
54 /*
55 * Get a log_item_desc to point at the new item.
56 */
57 xfs_trans_add_item(tp, &dqp->q_logitem.qli_item);
58
59 /*
60 * Initialize d_transp so we can later determine if this dquot is
61 * associated with this transaction.
62 */
63 dqp->q_transp = tp;
64}
65
66
67/*
68 * This is called to mark the dquot as needing
69 * to be logged when the transaction is committed. The dquot must
70 * already be associated with the given transaction.
71 * Note that it marks the entire transaction as dirty. In the ordinary
72 * case, this gets called via xfs_trans_commit, after the transaction
73 * is already dirty. However, there's nothing stop this from getting
74 * called directly, as done by xfs_qm_scall_setqlim. Hence, the TRANS_DIRTY
75 * flag.
76 */
77void
78xfs_trans_log_dquot(
79 xfs_trans_t *tp,
80 xfs_dquot_t *dqp)
81{
82 ASSERT(dqp->q_transp == tp);
83 ASSERT(XFS_DQ_IS_LOCKED(dqp));
84
85 tp->t_flags |= XFS_TRANS_DIRTY;
86 dqp->q_logitem.qli_item.li_desc->lid_flags |= XFS_LID_DIRTY;
87}
88
89/*
90 * Carry forward whatever is left of the quota blk reservation to
91 * the spanky new transaction
92 */
93void
94xfs_trans_dup_dqinfo(
95 xfs_trans_t *otp,
96 xfs_trans_t *ntp)
97{
98 xfs_dqtrx_t *oq, *nq;
99 int i,j;
100 xfs_dqtrx_t *oqa, *nqa;
101
102 if (!otp->t_dqinfo)
103 return;
104
105 xfs_trans_alloc_dqinfo(ntp);
106 oqa = otp->t_dqinfo->dqa_usrdquots;
107 nqa = ntp->t_dqinfo->dqa_usrdquots;
108
109 /*
110 * Because the quota blk reservation is carried forward,
111 * it is also necessary to carry forward the DQ_DIRTY flag.
112 */
113 if(otp->t_flags & XFS_TRANS_DQ_DIRTY)
114 ntp->t_flags |= XFS_TRANS_DQ_DIRTY;
115
116 for (j = 0; j < 2; j++) {
117 for (i = 0; i < XFS_QM_TRANS_MAXDQS; i++) {
118 if (oqa[i].qt_dquot == NULL)
119 break;
120 oq = &oqa[i];
121 nq = &nqa[i];
122
123 nq->qt_dquot = oq->qt_dquot;
124 nq->qt_bcount_delta = nq->qt_icount_delta = 0;
125 nq->qt_rtbcount_delta = 0;
126
127 /*
128 * Transfer whatever is left of the reservations.
129 */
130 nq->qt_blk_res = oq->qt_blk_res - oq->qt_blk_res_used;
131 oq->qt_blk_res = oq->qt_blk_res_used;
132
133 nq->qt_rtblk_res = oq->qt_rtblk_res -
134 oq->qt_rtblk_res_used;
135 oq->qt_rtblk_res = oq->qt_rtblk_res_used;
136
137 nq->qt_ino_res = oq->qt_ino_res - oq->qt_ino_res_used;
138 oq->qt_ino_res = oq->qt_ino_res_used;
139
140 }
141 oqa = otp->t_dqinfo->dqa_grpdquots;
142 nqa = ntp->t_dqinfo->dqa_grpdquots;
143 }
144}
145
146/*
147 * Wrap around mod_dquot to account for both user and group quotas.
148 */
149void
150xfs_trans_mod_dquot_byino(
151 xfs_trans_t *tp,
152 xfs_inode_t *ip,
153 uint field,
154 long delta)
155{
156 xfs_mount_t *mp = tp->t_mountp;
157
158 if (!XFS_IS_QUOTA_RUNNING(mp) ||
159 !XFS_IS_QUOTA_ON(mp) ||
160 ip->i_ino == mp->m_sb.sb_uquotino ||
161 ip->i_ino == mp->m_sb.sb_gquotino)
162 return;
163
164 if (tp->t_dqinfo == NULL)
165 xfs_trans_alloc_dqinfo(tp);
166
167 if (XFS_IS_UQUOTA_ON(mp) && ip->i_udquot)
168 (void) xfs_trans_mod_dquot(tp, ip->i_udquot, field, delta);
169 if (XFS_IS_OQUOTA_ON(mp) && ip->i_gdquot)
170 (void) xfs_trans_mod_dquot(tp, ip->i_gdquot, field, delta);
171}
172
173STATIC xfs_dqtrx_t *
174xfs_trans_get_dqtrx(
175 xfs_trans_t *tp,
176 xfs_dquot_t *dqp)
177{
178 int i;
179 xfs_dqtrx_t *qa;
180
181 qa = XFS_QM_ISUDQ(dqp) ?
182 tp->t_dqinfo->dqa_usrdquots : tp->t_dqinfo->dqa_grpdquots;
183
184 for (i = 0; i < XFS_QM_TRANS_MAXDQS; i++) {
185 if (qa[i].qt_dquot == NULL ||
186 qa[i].qt_dquot == dqp)
187 return &qa[i];
188 }
189
190 return NULL;
191}
192
193/*
194 * Make the changes in the transaction structure.
195 * The moral equivalent to xfs_trans_mod_sb().
196 * We don't touch any fields in the dquot, so we don't care
197 * if it's locked or not (most of the time it won't be).
198 */
199void
200xfs_trans_mod_dquot(
201 xfs_trans_t *tp,
202 xfs_dquot_t *dqp,
203 uint field,
204 long delta)
205{
206 xfs_dqtrx_t *qtrx;
207
208 ASSERT(tp);
209 ASSERT(XFS_IS_QUOTA_RUNNING(tp->t_mountp));
210 qtrx = NULL;
211
212 if (tp->t_dqinfo == NULL)
213 xfs_trans_alloc_dqinfo(tp);
214 /*
215 * Find either the first free slot or the slot that belongs
216 * to this dquot.
217 */
218 qtrx = xfs_trans_get_dqtrx(tp, dqp);
219 ASSERT(qtrx);
220 if (qtrx->qt_dquot == NULL)
221 qtrx->qt_dquot = dqp;
222
223 switch (field) {
224
225 /*
226 * regular disk blk reservation
227 */
228 case XFS_TRANS_DQ_RES_BLKS:
229 qtrx->qt_blk_res += (ulong)delta;
230 break;
231
232 /*
233 * inode reservation
234 */
235 case XFS_TRANS_DQ_RES_INOS:
236 qtrx->qt_ino_res += (ulong)delta;
237 break;
238
239 /*
240 * disk blocks used.
241 */
242 case XFS_TRANS_DQ_BCOUNT:
243 if (qtrx->qt_blk_res && delta > 0) {
244 qtrx->qt_blk_res_used += (ulong)delta;
245 ASSERT(qtrx->qt_blk_res >= qtrx->qt_blk_res_used);
246 }
247 qtrx->qt_bcount_delta += delta;
248 break;
249
250 case XFS_TRANS_DQ_DELBCOUNT:
251 qtrx->qt_delbcnt_delta += delta;
252 break;
253
254 /*
255 * Inode Count
256 */
257 case XFS_TRANS_DQ_ICOUNT:
258 if (qtrx->qt_ino_res && delta > 0) {
259 qtrx->qt_ino_res_used += (ulong)delta;
260 ASSERT(qtrx->qt_ino_res >= qtrx->qt_ino_res_used);
261 }
262 qtrx->qt_icount_delta += delta;
263 break;
264
265 /*
266 * rtblk reservation
267 */
268 case XFS_TRANS_DQ_RES_RTBLKS:
269 qtrx->qt_rtblk_res += (ulong)delta;
270 break;
271
272 /*
273 * rtblk count
274 */
275 case XFS_TRANS_DQ_RTBCOUNT:
276 if (qtrx->qt_rtblk_res && delta > 0) {
277 qtrx->qt_rtblk_res_used += (ulong)delta;
278 ASSERT(qtrx->qt_rtblk_res >= qtrx->qt_rtblk_res_used);
279 }
280 qtrx->qt_rtbcount_delta += delta;
281 break;
282
283 case XFS_TRANS_DQ_DELRTBCOUNT:
284 qtrx->qt_delrtb_delta += delta;
285 break;
286
287 default:
288 ASSERT(0);
289 }
290 tp->t_flags |= XFS_TRANS_DQ_DIRTY;
291}
292
293
294/*
295 * Given an array of dqtrx structures, lock all the dquots associated
296 * and join them to the transaction, provided they have been modified.
297 * We know that the highest number of dquots (of one type - usr OR grp),
298 * involved in a transaction is 2 and that both usr and grp combined - 3.
299 * So, we don't attempt to make this very generic.
300 */
301STATIC void
302xfs_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 */
327void
328xfs_trans_apply_dquot_deltas(
329 xfs_trans_t *tp)
330{
331 int i, j;
332 xfs_dquot_t *dqp;
333 xfs_dqtrx_t *qtrx, *qa;
334 xfs_disk_dquot_t *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 qa = tp->t_dqinfo->dqa_usrdquots;
343 for (j = 0; j < 2; j++) {
344 if (qa[0].qt_dquot == NULL) {
345 qa = tp->t_dqinfo->dqa_grpdquots;
346 continue;
347 }
348
349 /*
350 * Lock all of the dquots and join them to the transaction.
351 */
352 xfs_trans_dqlockedjoin(tp, qa);
353
354 for (i = 0; i < XFS_QM_TRANS_MAXDQS; i++) {
355 qtrx = &qa[i];
356 /*
357 * The array of dquots is filled
358 * sequentially, not sparsely.
359 */
360 if ((dqp = qtrx->qt_dquot) == NULL)
361 break;
362
363 ASSERT(XFS_DQ_IS_LOCKED(dqp));
364 ASSERT(dqp->q_transp == tp);
365
366 /*
367 * adjust the actual number of blocks used
368 */
369 d = &dqp->q_core;
370
371 /*
372 * The issue here is - sometimes we don't make a blkquota
373 * reservation intentionally to be fair to users
374 * (when the amount is small). On the other hand,
375 * delayed allocs do make reservations, but that's
376 * outside of a transaction, so we have no
377 * idea how much was really reserved.
378 * So, here we've accumulated delayed allocation blks and
379 * non-delay blks. The assumption is that the
380 * delayed ones are always reserved (outside of a
381 * transaction), and the others may or may not have
382 * quota reservations.
383 */
384 totalbdelta = qtrx->qt_bcount_delta +
385 qtrx->qt_delbcnt_delta;
386 totalrtbdelta = qtrx->qt_rtbcount_delta +
387 qtrx->qt_delrtb_delta;
388#ifdef DEBUG
389 if (totalbdelta < 0)
390 ASSERT(be64_to_cpu(d->d_bcount) >=
391 -totalbdelta);
392
393 if (totalrtbdelta < 0)
394 ASSERT(be64_to_cpu(d->d_rtbcount) >=
395 -totalrtbdelta);
396
397 if (qtrx->qt_icount_delta < 0)
398 ASSERT(be64_to_cpu(d->d_icount) >=
399 -qtrx->qt_icount_delta);
400#endif
401 if (totalbdelta)
402 be64_add_cpu(&d->d_bcount, (xfs_qcnt_t)totalbdelta);
403
404 if (qtrx->qt_icount_delta)
405 be64_add_cpu(&d->d_icount, (xfs_qcnt_t)qtrx->qt_icount_delta);
406
407 if (totalrtbdelta)
408 be64_add_cpu(&d->d_rtbcount, (xfs_qcnt_t)totalrtbdelta);
409
410 /*
411 * Get any default limits in use.
412 * Start/reset the timer(s) if needed.
413 */
414 if (d->d_id) {
415 xfs_qm_adjust_dqlimits(tp->t_mountp, d);
416 xfs_qm_adjust_dqtimers(tp->t_mountp, d);
417 }
418
419 dqp->dq_flags |= XFS_DQ_DIRTY;
420 /*
421 * add this to the list of items to get logged
422 */
423 xfs_trans_log_dquot(tp, dqp);
424 /*
425 * Take off what's left of the original reservation.
426 * In case of delayed allocations, there's no
427 * reservation that a transaction structure knows of.
428 */
429 if (qtrx->qt_blk_res != 0) {
430 if (qtrx->qt_blk_res != qtrx->qt_blk_res_used) {
431 if (qtrx->qt_blk_res >
432 qtrx->qt_blk_res_used)
433 dqp->q_res_bcount -= (xfs_qcnt_t)
434 (qtrx->qt_blk_res -
435 qtrx->qt_blk_res_used);
436 else
437 dqp->q_res_bcount -= (xfs_qcnt_t)
438 (qtrx->qt_blk_res_used -
439 qtrx->qt_blk_res);
440 }
441 } else {
442 /*
443 * These blks were never reserved, either inside
444 * a transaction or outside one (in a delayed
445 * allocation). Also, this isn't always a
446 * negative number since we sometimes
447 * deliberately skip quota reservations.
448 */
449 if (qtrx->qt_bcount_delta) {
450 dqp->q_res_bcount +=
451 (xfs_qcnt_t)qtrx->qt_bcount_delta;
452 }
453 }
454 /*
455 * Adjust the RT reservation.
456 */
457 if (qtrx->qt_rtblk_res != 0) {
458 if (qtrx->qt_rtblk_res != qtrx->qt_rtblk_res_used) {
459 if (qtrx->qt_rtblk_res >
460 qtrx->qt_rtblk_res_used)
461 dqp->q_res_rtbcount -= (xfs_qcnt_t)
462 (qtrx->qt_rtblk_res -
463 qtrx->qt_rtblk_res_used);
464 else
465 dqp->q_res_rtbcount -= (xfs_qcnt_t)
466 (qtrx->qt_rtblk_res_used -
467 qtrx->qt_rtblk_res);
468 }
469 } else {
470 if (qtrx->qt_rtbcount_delta)
471 dqp->q_res_rtbcount +=
472 (xfs_qcnt_t)qtrx->qt_rtbcount_delta;
473 }
474
475 /*
476 * Adjust the inode reservation.
477 */
478 if (qtrx->qt_ino_res != 0) {
479 ASSERT(qtrx->qt_ino_res >=
480 qtrx->qt_ino_res_used);
481 if (qtrx->qt_ino_res > qtrx->qt_ino_res_used)
482 dqp->q_res_icount -= (xfs_qcnt_t)
483 (qtrx->qt_ino_res -
484 qtrx->qt_ino_res_used);
485 } else {
486 if (qtrx->qt_icount_delta)
487 dqp->q_res_icount +=
488 (xfs_qcnt_t)qtrx->qt_icount_delta;
489 }
490
491 ASSERT(dqp->q_res_bcount >=
492 be64_to_cpu(dqp->q_core.d_bcount));
493 ASSERT(dqp->q_res_icount >=
494 be64_to_cpu(dqp->q_core.d_icount));
495 ASSERT(dqp->q_res_rtbcount >=
496 be64_to_cpu(dqp->q_core.d_rtbcount));
497 }
498 /*
499 * Do the group quotas next
500 */
501 qa = tp->t_dqinfo->dqa_grpdquots;
502 }
503}
504
505/*
506 * Release the reservations, and adjust the dquots accordingly.
507 * This is called only when the transaction is being aborted. If by
508 * any chance we have done dquot modifications incore (ie. deltas) already,
509 * we simply throw those away, since that's the expected behavior
510 * when a transaction is curtailed without a commit.
511 */
512void
513xfs_trans_unreserve_and_mod_dquots(
514 xfs_trans_t *tp)
515{
516 int i, j;
517 xfs_dquot_t *dqp;
518 xfs_dqtrx_t *qtrx, *qa;
519 boolean_t locked;
520
521 if (!tp->t_dqinfo || !(tp->t_flags & XFS_TRANS_DQ_DIRTY))
522 return;
523
524 qa = tp->t_dqinfo->dqa_usrdquots;
525
526 for (j = 0; j < 2; j++) {
527 for (i = 0; i < XFS_QM_TRANS_MAXDQS; i++) {
528 qtrx = &qa[i];
529 /*
530 * We assume that the array of dquots is filled
531 * sequentially, not sparsely.
532 */
533 if ((dqp = qtrx->qt_dquot) == NULL)
534 break;
535 /*
536 * Unreserve the original reservation. We don't care
537 * about the number of blocks used field, or deltas.
538 * Also we don't bother to zero the fields.
539 */
540 locked = B_FALSE;
541 if (qtrx->qt_blk_res) {
542 xfs_dqlock(dqp);
543 locked = B_TRUE;
544 dqp->q_res_bcount -=
545 (xfs_qcnt_t)qtrx->qt_blk_res;
546 }
547 if (qtrx->qt_ino_res) {
548 if (!locked) {
549 xfs_dqlock(dqp);
550 locked = B_TRUE;
551 }
552 dqp->q_res_icount -=
553 (xfs_qcnt_t)qtrx->qt_ino_res;
554 }
555
556 if (qtrx->qt_rtblk_res) {
557 if (!locked) {
558 xfs_dqlock(dqp);
559 locked = B_TRUE;
560 }
561 dqp->q_res_rtbcount -=
562 (xfs_qcnt_t)qtrx->qt_rtblk_res;
563 }
564 if (locked)
565 xfs_dqunlock(dqp);
566
567 }
568 qa = tp->t_dqinfo->dqa_grpdquots;
569 }
570}
571
572STATIC void
573xfs_quota_warn(
574 struct xfs_mount *mp,
575 struct xfs_dquot *dqp,
576 int type)
577{
578 /* no warnings for project quotas - we just return ENOSPC later */
579 if (dqp->dq_flags & XFS_DQ_PROJ)
580 return;
581 quota_send_warning((dqp->dq_flags & XFS_DQ_USER) ? USRQUOTA : GRPQUOTA,
582 be32_to_cpu(dqp->q_core.d_id), mp->m_super->s_dev,
583 type);
584}
585
586/*
587 * This reserves disk blocks and inodes against a dquot.
588 * Flags indicate if the dquot is to be locked here and also
589 * if the blk reservation is for RT or regular blocks.
590 * Sending in XFS_QMOPT_FORCE_RES flag skips the quota check.
591 */
592STATIC int
593xfs_trans_dqresv(
594 xfs_trans_t *tp,
595 xfs_mount_t *mp,
596 xfs_dquot_t *dqp,
597 long nblks,
598 long ninos,
599 uint flags)
600{
601 xfs_qcnt_t hardlimit;
602 xfs_qcnt_t softlimit;
603 time_t timer;
604 xfs_qwarncnt_t warns;
605 xfs_qwarncnt_t warnlimit;
606 xfs_qcnt_t total_count;
607 xfs_qcnt_t *resbcountp;
608 xfs_quotainfo_t *q = mp->m_quotainfo;
609
610
611 xfs_dqlock(dqp);
612
613 if (flags & XFS_TRANS_DQ_RES_BLKS) {
614 hardlimit = be64_to_cpu(dqp->q_core.d_blk_hardlimit);
615 if (!hardlimit)
616 hardlimit = q->qi_bhardlimit;
617 softlimit = be64_to_cpu(dqp->q_core.d_blk_softlimit);
618 if (!softlimit)
619 softlimit = q->qi_bsoftlimit;
620 timer = be32_to_cpu(dqp->q_core.d_btimer);
621 warns = be16_to_cpu(dqp->q_core.d_bwarns);
622 warnlimit = dqp->q_mount->m_quotainfo->qi_bwarnlimit;
623 resbcountp = &dqp->q_res_bcount;
624 } else {
625 ASSERT(flags & XFS_TRANS_DQ_RES_RTBLKS);
626 hardlimit = be64_to_cpu(dqp->q_core.d_rtb_hardlimit);
627 if (!hardlimit)
628 hardlimit = q->qi_rtbhardlimit;
629 softlimit = be64_to_cpu(dqp->q_core.d_rtb_softlimit);
630 if (!softlimit)
631 softlimit = q->qi_rtbsoftlimit;
632 timer = be32_to_cpu(dqp->q_core.d_rtbtimer);
633 warns = be16_to_cpu(dqp->q_core.d_rtbwarns);
634 warnlimit = dqp->q_mount->m_quotainfo->qi_rtbwarnlimit;
635 resbcountp = &dqp->q_res_rtbcount;
636 }
637
638 if ((flags & XFS_QMOPT_FORCE_RES) == 0 &&
639 dqp->q_core.d_id &&
640 ((XFS_IS_UQUOTA_ENFORCED(dqp->q_mount) && XFS_QM_ISUDQ(dqp)) ||
641 (XFS_IS_OQUOTA_ENFORCED(dqp->q_mount) &&
642 (XFS_QM_ISPDQ(dqp) || XFS_QM_ISGDQ(dqp))))) {
643 if (nblks > 0) {
644 /*
645 * dquot is locked already. See if we'd go over the
646 * hardlimit or exceed the timelimit if we allocate
647 * nblks.
648 */
649 total_count = *resbcountp + nblks;
650 if (hardlimit && total_count > hardlimit) {
651 xfs_quota_warn(mp, dqp, QUOTA_NL_BHARDWARN);
652 goto error_return;
653 }
654 if (softlimit && total_count > softlimit) {
655 if ((timer != 0 && get_seconds() > timer) ||
656 (warns != 0 && warns >= warnlimit)) {
657 xfs_quota_warn(mp, dqp,
658 QUOTA_NL_BSOFTLONGWARN);
659 goto error_return;
660 }
661
662 xfs_quota_warn(mp, dqp, QUOTA_NL_BSOFTWARN);
663 }
664 }
665 if (ninos > 0) {
666 total_count = be64_to_cpu(dqp->q_core.d_icount) + ninos;
667 timer = be32_to_cpu(dqp->q_core.d_itimer);
668 warns = be16_to_cpu(dqp->q_core.d_iwarns);
669 warnlimit = dqp->q_mount->m_quotainfo->qi_iwarnlimit;
670 hardlimit = be64_to_cpu(dqp->q_core.d_ino_hardlimit);
671 if (!hardlimit)
672 hardlimit = q->qi_ihardlimit;
673 softlimit = be64_to_cpu(dqp->q_core.d_ino_softlimit);
674 if (!softlimit)
675 softlimit = q->qi_isoftlimit;
676
677 if (hardlimit && total_count > hardlimit) {
678 xfs_quota_warn(mp, dqp, QUOTA_NL_IHARDWARN);
679 goto error_return;
680 }
681 if (softlimit && total_count > softlimit) {
682 if ((timer != 0 && get_seconds() > timer) ||
683 (warns != 0 && warns >= warnlimit)) {
684 xfs_quota_warn(mp, dqp,
685 QUOTA_NL_ISOFTLONGWARN);
686 goto error_return;
687 }
688 xfs_quota_warn(mp, dqp, QUOTA_NL_ISOFTWARN);
689 }
690 }
691 }
692
693 /*
694 * Change the reservation, but not the actual usage.
695 * Note that q_res_bcount = q_core.d_bcount + resv
696 */
697 (*resbcountp) += (xfs_qcnt_t)nblks;
698 if (ninos != 0)
699 dqp->q_res_icount += (xfs_qcnt_t)ninos;
700
701 /*
702 * note the reservation amt in the trans struct too,
703 * so that the transaction knows how much was reserved by
704 * it against this particular dquot.
705 * We don't do this when we are reserving for a delayed allocation,
706 * because we don't have the luxury of a transaction envelope then.
707 */
708 if (tp) {
709 ASSERT(tp->t_dqinfo);
710 ASSERT(flags & XFS_QMOPT_RESBLK_MASK);
711 if (nblks != 0)
712 xfs_trans_mod_dquot(tp, dqp,
713 flags & XFS_QMOPT_RESBLK_MASK,
714 nblks);
715 if (ninos != 0)
716 xfs_trans_mod_dquot(tp, dqp,
717 XFS_TRANS_DQ_RES_INOS,
718 ninos);
719 }
720 ASSERT(dqp->q_res_bcount >= be64_to_cpu(dqp->q_core.d_bcount));
721 ASSERT(dqp->q_res_rtbcount >= be64_to_cpu(dqp->q_core.d_rtbcount));
722 ASSERT(dqp->q_res_icount >= be64_to_cpu(dqp->q_core.d_icount));
723
724 xfs_dqunlock(dqp);
725 return 0;
726
727error_return:
728 xfs_dqunlock(dqp);
729 if (flags & XFS_QMOPT_ENOSPC)
730 return ENOSPC;
731 return EDQUOT;
732}
733
734
735/*
736 * Given dquot(s), make disk block and/or inode reservations against them.
737 * The fact that this does the reservation against both the usr and
738 * grp/prj quotas is important, because this follows a both-or-nothing
739 * approach.
740 *
741 * flags = XFS_QMOPT_FORCE_RES evades limit enforcement. Used by chown.
742 * XFS_QMOPT_ENOSPC returns ENOSPC not EDQUOT. Used by pquota.
743 * XFS_TRANS_DQ_RES_BLKS reserves regular disk blocks
744 * XFS_TRANS_DQ_RES_RTBLKS reserves realtime disk blocks
745 * dquots are unlocked on return, if they were not locked by caller.
746 */
747int
748xfs_trans_reserve_quota_bydquots(
749 xfs_trans_t *tp,
750 xfs_mount_t *mp,
751 xfs_dquot_t *udqp,
752 xfs_dquot_t *gdqp,
753 long nblks,
754 long ninos,
755 uint flags)
756{
757 int resvd = 0, error;
758
759 if (!XFS_IS_QUOTA_RUNNING(mp) || !XFS_IS_QUOTA_ON(mp))
760 return 0;
761
762 if (tp && tp->t_dqinfo == NULL)
763 xfs_trans_alloc_dqinfo(tp);
764
765 ASSERT(flags & XFS_QMOPT_RESBLK_MASK);
766
767 if (udqp) {
768 error = xfs_trans_dqresv(tp, mp, udqp, nblks, ninos,
769 (flags & ~XFS_QMOPT_ENOSPC));
770 if (error)
771 return error;
772 resvd = 1;
773 }
774
775 if (gdqp) {
776 error = xfs_trans_dqresv(tp, mp, gdqp, nblks, ninos, flags);
777 if (error) {
778 /*
779 * can't do it, so backout previous reservation
780 */
781 if (resvd) {
782 flags |= XFS_QMOPT_FORCE_RES;
783 xfs_trans_dqresv(tp, mp, udqp,
784 -nblks, -ninos, flags);
785 }
786 return error;
787 }
788 }
789
790 /*
791 * Didn't change anything critical, so, no need to log
792 */
793 return 0;
794}
795
796
797/*
798 * Lock the dquot and change the reservation if we can.
799 * This doesn't change the actual usage, just the reservation.
800 * The inode sent in is locked.
801 */
802int
803xfs_trans_reserve_quota_nblks(
804 struct xfs_trans *tp,
805 struct xfs_inode *ip,
806 long nblks,
807 long ninos,
808 uint flags)
809{
810 struct xfs_mount *mp = ip->i_mount;
811
812 if (!XFS_IS_QUOTA_RUNNING(mp) || !XFS_IS_QUOTA_ON(mp))
813 return 0;
814 if (XFS_IS_PQUOTA_ON(mp))
815 flags |= XFS_QMOPT_ENOSPC;
816
817 ASSERT(ip->i_ino != mp->m_sb.sb_uquotino);
818 ASSERT(ip->i_ino != mp->m_sb.sb_gquotino);
819
820 ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL));
821 ASSERT((flags & ~(XFS_QMOPT_FORCE_RES | XFS_QMOPT_ENOSPC)) ==
822 XFS_TRANS_DQ_RES_RTBLKS ||
823 (flags & ~(XFS_QMOPT_FORCE_RES | XFS_QMOPT_ENOSPC)) ==
824 XFS_TRANS_DQ_RES_BLKS);
825
826 /*
827 * Reserve nblks against these dquots, with trans as the mediator.
828 */
829 return xfs_trans_reserve_quota_bydquots(tp, mp,
830 ip->i_udquot, ip->i_gdquot,
831 nblks, ninos, flags);
832}
833
834/*
835 * This routine is called to allocate a quotaoff log item.
836 */
837xfs_qoff_logitem_t *
838xfs_trans_get_qoff_item(
839 xfs_trans_t *tp,
840 xfs_qoff_logitem_t *startqoff,
841 uint flags)
842{
843 xfs_qoff_logitem_t *q;
844
845 ASSERT(tp != NULL);
846
847 q = xfs_qm_qoff_logitem_init(tp->t_mountp, startqoff, flags);
848 ASSERT(q != NULL);
849
850 /*
851 * Get a log_item_desc to point at the new item.
852 */
853 xfs_trans_add_item(tp, &q->qql_item);
854 return q;
855}
856
857
858/*
859 * This is called to mark the quotaoff logitem as needing
860 * to be logged when the transaction is committed. The logitem must
861 * already be associated with the given transaction.
862 */
863void
864xfs_trans_log_quotaoff_item(
865 xfs_trans_t *tp,
866 xfs_qoff_logitem_t *qlp)
867{
868 tp->t_flags |= XFS_TRANS_DIRTY;
869 qlp->qql_item.li_desc->lid_flags |= XFS_LID_DIRTY;
870}
871
872STATIC void
873xfs_trans_alloc_dqinfo(
874 xfs_trans_t *tp)
875{
876 tp->t_dqinfo = kmem_zone_zalloc(xfs_qm_dqtrxzone, KM_SLEEP);
877}
878
879void
880xfs_trans_free_dqinfo(
881 xfs_trans_t *tp)
882{
883 if (!tp->t_dqinfo)
884 return;
885 kmem_zone_free(xfs_qm_dqtrxzone, tp->t_dqinfo);
886 tp->t_dqinfo = NULL;
887}
1// SPDX-License-Identifier: GPL-2.0
2/*
3 * Copyright (c) 2000-2002 Silicon Graphics, Inc.
4 * All Rights Reserved.
5 */
6#include "xfs.h"
7#include "xfs_fs.h"
8#include "xfs_shared.h"
9#include "xfs_format.h"
10#include "xfs_log_format.h"
11#include "xfs_trans_resv.h"
12#include "xfs_mount.h"
13#include "xfs_inode.h"
14#include "xfs_trans.h"
15#include "xfs_trans_priv.h"
16#include "xfs_quota.h"
17#include "xfs_qm.h"
18
19STATIC void xfs_trans_alloc_dqinfo(xfs_trans_t *);
20
21/*
22 * Add the locked dquot to the transaction.
23 * The dquot must be locked, and it cannot be associated with any
24 * transaction.
25 */
26void
27xfs_trans_dqjoin(
28 xfs_trans_t *tp,
29 xfs_dquot_t *dqp)
30{
31 ASSERT(XFS_DQ_IS_LOCKED(dqp));
32 ASSERT(dqp->q_logitem.qli_dquot == dqp);
33
34 /*
35 * Get a log_item_desc to point at the new item.
36 */
37 xfs_trans_add_item(tp, &dqp->q_logitem.qli_item);
38}
39
40/*
41 * This is called to mark the dquot as needing
42 * to be logged when the transaction is committed. The dquot must
43 * already be associated with the given transaction.
44 * Note that it marks the entire transaction as dirty. In the ordinary
45 * case, this gets called via xfs_trans_commit, after the transaction
46 * is already dirty. However, there's nothing stop this from getting
47 * called directly, as done by xfs_qm_scall_setqlim. Hence, the TRANS_DIRTY
48 * flag.
49 */
50void
51xfs_trans_log_dquot(
52 xfs_trans_t *tp,
53 xfs_dquot_t *dqp)
54{
55 ASSERT(XFS_DQ_IS_LOCKED(dqp));
56
57 tp->t_flags |= XFS_TRANS_DIRTY;
58 set_bit(XFS_LI_DIRTY, &dqp->q_logitem.qli_item.li_flags);
59}
60
61/*
62 * Carry forward whatever is left of the quota blk reservation to
63 * the spanky new transaction
64 */
65void
66xfs_trans_dup_dqinfo(
67 struct xfs_trans *otp,
68 struct xfs_trans *ntp)
69{
70 struct xfs_dqtrx *oq, *nq;
71 int i, j;
72 struct xfs_dqtrx *oqa, *nqa;
73 uint64_t blk_res_used;
74
75 if (!otp->t_dqinfo)
76 return;
77
78 xfs_trans_alloc_dqinfo(ntp);
79
80 /*
81 * Because the quota blk reservation is carried forward,
82 * it is also necessary to carry forward the DQ_DIRTY flag.
83 */
84 if (otp->t_flags & XFS_TRANS_DQ_DIRTY)
85 ntp->t_flags |= XFS_TRANS_DQ_DIRTY;
86
87 for (j = 0; j < XFS_QM_TRANS_DQTYPES; j++) {
88 oqa = otp->t_dqinfo->dqs[j];
89 nqa = ntp->t_dqinfo->dqs[j];
90 for (i = 0; i < XFS_QM_TRANS_MAXDQS; i++) {
91 blk_res_used = 0;
92
93 if (oqa[i].qt_dquot == NULL)
94 break;
95 oq = &oqa[i];
96 nq = &nqa[i];
97
98 if (oq->qt_blk_res && oq->qt_bcount_delta > 0)
99 blk_res_used = oq->qt_bcount_delta;
100
101 nq->qt_dquot = oq->qt_dquot;
102 nq->qt_bcount_delta = nq->qt_icount_delta = 0;
103 nq->qt_rtbcount_delta = 0;
104
105 /*
106 * Transfer whatever is left of the reservations.
107 */
108 nq->qt_blk_res = oq->qt_blk_res - blk_res_used;
109 oq->qt_blk_res = blk_res_used;
110
111 nq->qt_rtblk_res = oq->qt_rtblk_res -
112 oq->qt_rtblk_res_used;
113 oq->qt_rtblk_res = oq->qt_rtblk_res_used;
114
115 nq->qt_ino_res = oq->qt_ino_res - oq->qt_ino_res_used;
116 oq->qt_ino_res = oq->qt_ino_res_used;
117
118 }
119 }
120}
121
122/*
123 * Wrap around mod_dquot to account for both user and group quotas.
124 */
125void
126xfs_trans_mod_dquot_byino(
127 xfs_trans_t *tp,
128 xfs_inode_t *ip,
129 uint field,
130 int64_t delta)
131{
132 xfs_mount_t *mp = tp->t_mountp;
133
134 if (!XFS_IS_QUOTA_RUNNING(mp) ||
135 !XFS_IS_QUOTA_ON(mp) ||
136 xfs_is_quota_inode(&mp->m_sb, ip->i_ino))
137 return;
138
139 if (tp->t_dqinfo == NULL)
140 xfs_trans_alloc_dqinfo(tp);
141
142 if (XFS_IS_UQUOTA_ON(mp) && ip->i_udquot)
143 (void) xfs_trans_mod_dquot(tp, ip->i_udquot, field, delta);
144 if (XFS_IS_GQUOTA_ON(mp) && ip->i_gdquot)
145 (void) xfs_trans_mod_dquot(tp, ip->i_gdquot, field, delta);
146 if (XFS_IS_PQUOTA_ON(mp) && ip->i_pdquot)
147 (void) xfs_trans_mod_dquot(tp, ip->i_pdquot, field, delta);
148}
149
150STATIC struct xfs_dqtrx *
151xfs_trans_get_dqtrx(
152 struct xfs_trans *tp,
153 struct xfs_dquot *dqp)
154{
155 int i;
156 struct xfs_dqtrx *qa;
157
158 if (XFS_QM_ISUDQ(dqp))
159 qa = tp->t_dqinfo->dqs[XFS_QM_TRANS_USR];
160 else if (XFS_QM_ISGDQ(dqp))
161 qa = tp->t_dqinfo->dqs[XFS_QM_TRANS_GRP];
162 else if (XFS_QM_ISPDQ(dqp))
163 qa = tp->t_dqinfo->dqs[XFS_QM_TRANS_PRJ];
164 else
165 return NULL;
166
167 for (i = 0; i < XFS_QM_TRANS_MAXDQS; i++) {
168 if (qa[i].qt_dquot == NULL ||
169 qa[i].qt_dquot == dqp)
170 return &qa[i];
171 }
172
173 return NULL;
174}
175
176/*
177 * Make the changes in the transaction structure.
178 * The moral equivalent to xfs_trans_mod_sb().
179 * We don't touch any fields in the dquot, so we don't care
180 * if it's locked or not (most of the time it won't be).
181 */
182void
183xfs_trans_mod_dquot(
184 struct xfs_trans *tp,
185 struct xfs_dquot *dqp,
186 uint field,
187 int64_t delta)
188{
189 struct xfs_dqtrx *qtrx;
190
191 ASSERT(tp);
192 ASSERT(XFS_IS_QUOTA_RUNNING(tp->t_mountp));
193 qtrx = NULL;
194
195 if (tp->t_dqinfo == NULL)
196 xfs_trans_alloc_dqinfo(tp);
197 /*
198 * Find either the first free slot or the slot that belongs
199 * to this dquot.
200 */
201 qtrx = xfs_trans_get_dqtrx(tp, dqp);
202 ASSERT(qtrx);
203 if (qtrx->qt_dquot == NULL)
204 qtrx->qt_dquot = dqp;
205
206 switch (field) {
207
208 /*
209 * regular disk blk reservation
210 */
211 case XFS_TRANS_DQ_RES_BLKS:
212 qtrx->qt_blk_res += delta;
213 break;
214
215 /*
216 * inode reservation
217 */
218 case XFS_TRANS_DQ_RES_INOS:
219 qtrx->qt_ino_res += delta;
220 break;
221
222 /*
223 * disk blocks used.
224 */
225 case XFS_TRANS_DQ_BCOUNT:
226 qtrx->qt_bcount_delta += delta;
227 break;
228
229 case XFS_TRANS_DQ_DELBCOUNT:
230 qtrx->qt_delbcnt_delta += delta;
231 break;
232
233 /*
234 * Inode Count
235 */
236 case XFS_TRANS_DQ_ICOUNT:
237 if (qtrx->qt_ino_res && delta > 0) {
238 qtrx->qt_ino_res_used += delta;
239 ASSERT(qtrx->qt_ino_res >= qtrx->qt_ino_res_used);
240 }
241 qtrx->qt_icount_delta += delta;
242 break;
243
244 /*
245 * rtblk reservation
246 */
247 case XFS_TRANS_DQ_RES_RTBLKS:
248 qtrx->qt_rtblk_res += delta;
249 break;
250
251 /*
252 * rtblk count
253 */
254 case XFS_TRANS_DQ_RTBCOUNT:
255 if (qtrx->qt_rtblk_res && delta > 0) {
256 qtrx->qt_rtblk_res_used += delta;
257 ASSERT(qtrx->qt_rtblk_res >= qtrx->qt_rtblk_res_used);
258 }
259 qtrx->qt_rtbcount_delta += delta;
260 break;
261
262 case XFS_TRANS_DQ_DELRTBCOUNT:
263 qtrx->qt_delrtb_delta += delta;
264 break;
265
266 default:
267 ASSERT(0);
268 }
269 tp->t_flags |= XFS_TRANS_DQ_DIRTY;
270}
271
272
273/*
274 * Given an array of dqtrx structures, lock all the dquots associated and join
275 * them to the transaction, provided they have been modified. We know that the
276 * highest number of dquots of one type - usr, grp and prj - involved in a
277 * transaction is 3 so we don't need to make this very generic.
278 */
279STATIC void
280xfs_trans_dqlockedjoin(
281 struct xfs_trans *tp,
282 struct xfs_dqtrx *q)
283{
284 ASSERT(q[0].qt_dquot != NULL);
285 if (q[1].qt_dquot == NULL) {
286 xfs_dqlock(q[0].qt_dquot);
287 xfs_trans_dqjoin(tp, q[0].qt_dquot);
288 } else {
289 ASSERT(XFS_QM_TRANS_MAXDQS == 2);
290 xfs_dqlock2(q[0].qt_dquot, q[1].qt_dquot);
291 xfs_trans_dqjoin(tp, q[0].qt_dquot);
292 xfs_trans_dqjoin(tp, q[1].qt_dquot);
293 }
294}
295
296
297/*
298 * Called by xfs_trans_commit() and similar in spirit to
299 * xfs_trans_apply_sb_deltas().
300 * Go thru all the dquots belonging to this transaction and modify the
301 * INCORE dquot to reflect the actual usages.
302 * Unreserve just the reservations done by this transaction.
303 * dquot is still left locked at exit.
304 */
305void
306xfs_trans_apply_dquot_deltas(
307 struct xfs_trans *tp)
308{
309 int i, j;
310 struct xfs_dquot *dqp;
311 struct xfs_dqtrx *qtrx, *qa;
312 struct xfs_disk_dquot *d;
313 int64_t totalbdelta;
314 int64_t totalrtbdelta;
315
316 if (!(tp->t_flags & XFS_TRANS_DQ_DIRTY))
317 return;
318
319 ASSERT(tp->t_dqinfo);
320 for (j = 0; j < XFS_QM_TRANS_DQTYPES; j++) {
321 qa = tp->t_dqinfo->dqs[j];
322 if (qa[0].qt_dquot == NULL)
323 continue;
324
325 /*
326 * Lock all of the dquots and join them to the transaction.
327 */
328 xfs_trans_dqlockedjoin(tp, qa);
329
330 for (i = 0; i < XFS_QM_TRANS_MAXDQS; i++) {
331 qtrx = &qa[i];
332 /*
333 * The array of dquots is filled
334 * sequentially, not sparsely.
335 */
336 if ((dqp = qtrx->qt_dquot) == NULL)
337 break;
338
339 ASSERT(XFS_DQ_IS_LOCKED(dqp));
340
341 /*
342 * adjust the actual number of blocks used
343 */
344 d = &dqp->q_core;
345
346 /*
347 * The issue here is - sometimes we don't make a blkquota
348 * reservation intentionally to be fair to users
349 * (when the amount is small). On the other hand,
350 * delayed allocs do make reservations, but that's
351 * outside of a transaction, so we have no
352 * idea how much was really reserved.
353 * So, here we've accumulated delayed allocation blks and
354 * non-delay blks. The assumption is that the
355 * delayed ones are always reserved (outside of a
356 * transaction), and the others may or may not have
357 * quota reservations.
358 */
359 totalbdelta = qtrx->qt_bcount_delta +
360 qtrx->qt_delbcnt_delta;
361 totalrtbdelta = qtrx->qt_rtbcount_delta +
362 qtrx->qt_delrtb_delta;
363#ifdef DEBUG
364 if (totalbdelta < 0)
365 ASSERT(be64_to_cpu(d->d_bcount) >=
366 -totalbdelta);
367
368 if (totalrtbdelta < 0)
369 ASSERT(be64_to_cpu(d->d_rtbcount) >=
370 -totalrtbdelta);
371
372 if (qtrx->qt_icount_delta < 0)
373 ASSERT(be64_to_cpu(d->d_icount) >=
374 -qtrx->qt_icount_delta);
375#endif
376 if (totalbdelta)
377 be64_add_cpu(&d->d_bcount, (xfs_qcnt_t)totalbdelta);
378
379 if (qtrx->qt_icount_delta)
380 be64_add_cpu(&d->d_icount, (xfs_qcnt_t)qtrx->qt_icount_delta);
381
382 if (totalrtbdelta)
383 be64_add_cpu(&d->d_rtbcount, (xfs_qcnt_t)totalrtbdelta);
384
385 /*
386 * Get any default limits in use.
387 * Start/reset the timer(s) if needed.
388 */
389 if (d->d_id) {
390 xfs_qm_adjust_dqlimits(tp->t_mountp, dqp);
391 xfs_qm_adjust_dqtimers(tp->t_mountp, d);
392 }
393
394 dqp->dq_flags |= XFS_DQ_DIRTY;
395 /*
396 * add this to the list of items to get logged
397 */
398 xfs_trans_log_dquot(tp, dqp);
399 /*
400 * Take off what's left of the original reservation.
401 * In case of delayed allocations, there's no
402 * reservation that a transaction structure knows of.
403 */
404 if (qtrx->qt_blk_res != 0) {
405 uint64_t blk_res_used = 0;
406
407 if (qtrx->qt_bcount_delta > 0)
408 blk_res_used = qtrx->qt_bcount_delta;
409
410 if (qtrx->qt_blk_res != blk_res_used) {
411 if (qtrx->qt_blk_res > blk_res_used)
412 dqp->q_res_bcount -= (xfs_qcnt_t)
413 (qtrx->qt_blk_res -
414 blk_res_used);
415 else
416 dqp->q_res_bcount -= (xfs_qcnt_t)
417 (blk_res_used -
418 qtrx->qt_blk_res);
419 }
420 } else {
421 /*
422 * These blks were never reserved, either inside
423 * a transaction or outside one (in a delayed
424 * allocation). Also, this isn't always a
425 * negative number since we sometimes
426 * deliberately skip quota reservations.
427 */
428 if (qtrx->qt_bcount_delta) {
429 dqp->q_res_bcount +=
430 (xfs_qcnt_t)qtrx->qt_bcount_delta;
431 }
432 }
433 /*
434 * Adjust the RT reservation.
435 */
436 if (qtrx->qt_rtblk_res != 0) {
437 if (qtrx->qt_rtblk_res != qtrx->qt_rtblk_res_used) {
438 if (qtrx->qt_rtblk_res >
439 qtrx->qt_rtblk_res_used)
440 dqp->q_res_rtbcount -= (xfs_qcnt_t)
441 (qtrx->qt_rtblk_res -
442 qtrx->qt_rtblk_res_used);
443 else
444 dqp->q_res_rtbcount -= (xfs_qcnt_t)
445 (qtrx->qt_rtblk_res_used -
446 qtrx->qt_rtblk_res);
447 }
448 } else {
449 if (qtrx->qt_rtbcount_delta)
450 dqp->q_res_rtbcount +=
451 (xfs_qcnt_t)qtrx->qt_rtbcount_delta;
452 }
453
454 /*
455 * Adjust the inode reservation.
456 */
457 if (qtrx->qt_ino_res != 0) {
458 ASSERT(qtrx->qt_ino_res >=
459 qtrx->qt_ino_res_used);
460 if (qtrx->qt_ino_res > qtrx->qt_ino_res_used)
461 dqp->q_res_icount -= (xfs_qcnt_t)
462 (qtrx->qt_ino_res -
463 qtrx->qt_ino_res_used);
464 } else {
465 if (qtrx->qt_icount_delta)
466 dqp->q_res_icount +=
467 (xfs_qcnt_t)qtrx->qt_icount_delta;
468 }
469
470 ASSERT(dqp->q_res_bcount >=
471 be64_to_cpu(dqp->q_core.d_bcount));
472 ASSERT(dqp->q_res_icount >=
473 be64_to_cpu(dqp->q_core.d_icount));
474 ASSERT(dqp->q_res_rtbcount >=
475 be64_to_cpu(dqp->q_core.d_rtbcount));
476 }
477 }
478}
479
480/*
481 * Release the reservations, and adjust the dquots accordingly.
482 * This is called only when the transaction is being aborted. If by
483 * any chance we have done dquot modifications incore (ie. deltas) already,
484 * we simply throw those away, since that's the expected behavior
485 * when a transaction is curtailed without a commit.
486 */
487void
488xfs_trans_unreserve_and_mod_dquots(
489 xfs_trans_t *tp)
490{
491 int i, j;
492 xfs_dquot_t *dqp;
493 struct xfs_dqtrx *qtrx, *qa;
494 bool locked;
495
496 if (!tp->t_dqinfo || !(tp->t_flags & XFS_TRANS_DQ_DIRTY))
497 return;
498
499 for (j = 0; j < XFS_QM_TRANS_DQTYPES; j++) {
500 qa = tp->t_dqinfo->dqs[j];
501
502 for (i = 0; i < XFS_QM_TRANS_MAXDQS; i++) {
503 qtrx = &qa[i];
504 /*
505 * We assume that the array of dquots is filled
506 * sequentially, not sparsely.
507 */
508 if ((dqp = qtrx->qt_dquot) == NULL)
509 break;
510 /*
511 * Unreserve the original reservation. We don't care
512 * about the number of blocks used field, or deltas.
513 * Also we don't bother to zero the fields.
514 */
515 locked = false;
516 if (qtrx->qt_blk_res) {
517 xfs_dqlock(dqp);
518 locked = true;
519 dqp->q_res_bcount -=
520 (xfs_qcnt_t)qtrx->qt_blk_res;
521 }
522 if (qtrx->qt_ino_res) {
523 if (!locked) {
524 xfs_dqlock(dqp);
525 locked = true;
526 }
527 dqp->q_res_icount -=
528 (xfs_qcnt_t)qtrx->qt_ino_res;
529 }
530
531 if (qtrx->qt_rtblk_res) {
532 if (!locked) {
533 xfs_dqlock(dqp);
534 locked = true;
535 }
536 dqp->q_res_rtbcount -=
537 (xfs_qcnt_t)qtrx->qt_rtblk_res;
538 }
539 if (locked)
540 xfs_dqunlock(dqp);
541
542 }
543 }
544}
545
546STATIC void
547xfs_quota_warn(
548 struct xfs_mount *mp,
549 struct xfs_dquot *dqp,
550 int type)
551{
552 enum quota_type qtype;
553
554 if (dqp->dq_flags & XFS_DQ_PROJ)
555 qtype = PRJQUOTA;
556 else if (dqp->dq_flags & XFS_DQ_USER)
557 qtype = USRQUOTA;
558 else
559 qtype = GRPQUOTA;
560
561 quota_send_warning(make_kqid(&init_user_ns, qtype,
562 be32_to_cpu(dqp->q_core.d_id)),
563 mp->m_super->s_dev, type);
564}
565
566/*
567 * This reserves disk blocks and inodes against a dquot.
568 * Flags indicate if the dquot is to be locked here and also
569 * if the blk reservation is for RT or regular blocks.
570 * Sending in XFS_QMOPT_FORCE_RES flag skips the quota check.
571 */
572STATIC int
573xfs_trans_dqresv(
574 xfs_trans_t *tp,
575 xfs_mount_t *mp,
576 xfs_dquot_t *dqp,
577 int64_t nblks,
578 long ninos,
579 uint flags)
580{
581 xfs_qcnt_t hardlimit;
582 xfs_qcnt_t softlimit;
583 time_t timer;
584 xfs_qwarncnt_t warns;
585 xfs_qwarncnt_t warnlimit;
586 xfs_qcnt_t total_count;
587 xfs_qcnt_t *resbcountp;
588 xfs_quotainfo_t *q = mp->m_quotainfo;
589 struct xfs_def_quota *defq;
590
591
592 xfs_dqlock(dqp);
593
594 defq = xfs_get_defquota(dqp, q);
595
596 if (flags & XFS_TRANS_DQ_RES_BLKS) {
597 hardlimit = be64_to_cpu(dqp->q_core.d_blk_hardlimit);
598 if (!hardlimit)
599 hardlimit = defq->bhardlimit;
600 softlimit = be64_to_cpu(dqp->q_core.d_blk_softlimit);
601 if (!softlimit)
602 softlimit = defq->bsoftlimit;
603 timer = be32_to_cpu(dqp->q_core.d_btimer);
604 warns = be16_to_cpu(dqp->q_core.d_bwarns);
605 warnlimit = dqp->q_mount->m_quotainfo->qi_bwarnlimit;
606 resbcountp = &dqp->q_res_bcount;
607 } else {
608 ASSERT(flags & XFS_TRANS_DQ_RES_RTBLKS);
609 hardlimit = be64_to_cpu(dqp->q_core.d_rtb_hardlimit);
610 if (!hardlimit)
611 hardlimit = defq->rtbhardlimit;
612 softlimit = be64_to_cpu(dqp->q_core.d_rtb_softlimit);
613 if (!softlimit)
614 softlimit = defq->rtbsoftlimit;
615 timer = be32_to_cpu(dqp->q_core.d_rtbtimer);
616 warns = be16_to_cpu(dqp->q_core.d_rtbwarns);
617 warnlimit = dqp->q_mount->m_quotainfo->qi_rtbwarnlimit;
618 resbcountp = &dqp->q_res_rtbcount;
619 }
620
621 if ((flags & XFS_QMOPT_FORCE_RES) == 0 &&
622 dqp->q_core.d_id &&
623 ((XFS_IS_UQUOTA_ENFORCED(dqp->q_mount) && XFS_QM_ISUDQ(dqp)) ||
624 (XFS_IS_GQUOTA_ENFORCED(dqp->q_mount) && XFS_QM_ISGDQ(dqp)) ||
625 (XFS_IS_PQUOTA_ENFORCED(dqp->q_mount) && XFS_QM_ISPDQ(dqp)))) {
626 if (nblks > 0) {
627 /*
628 * dquot is locked already. See if we'd go over the
629 * hardlimit or exceed the timelimit if we allocate
630 * nblks.
631 */
632 total_count = *resbcountp + nblks;
633 if (hardlimit && total_count > hardlimit) {
634 xfs_quota_warn(mp, dqp, QUOTA_NL_BHARDWARN);
635 goto error_return;
636 }
637 if (softlimit && total_count > softlimit) {
638 if ((timer != 0 && get_seconds() > timer) ||
639 (warns != 0 && warns >= warnlimit)) {
640 xfs_quota_warn(mp, dqp,
641 QUOTA_NL_BSOFTLONGWARN);
642 goto error_return;
643 }
644
645 xfs_quota_warn(mp, dqp, QUOTA_NL_BSOFTWARN);
646 }
647 }
648 if (ninos > 0) {
649 total_count = be64_to_cpu(dqp->q_core.d_icount) + ninos;
650 timer = be32_to_cpu(dqp->q_core.d_itimer);
651 warns = be16_to_cpu(dqp->q_core.d_iwarns);
652 warnlimit = dqp->q_mount->m_quotainfo->qi_iwarnlimit;
653 hardlimit = be64_to_cpu(dqp->q_core.d_ino_hardlimit);
654 if (!hardlimit)
655 hardlimit = defq->ihardlimit;
656 softlimit = be64_to_cpu(dqp->q_core.d_ino_softlimit);
657 if (!softlimit)
658 softlimit = defq->isoftlimit;
659
660 if (hardlimit && total_count > hardlimit) {
661 xfs_quota_warn(mp, dqp, QUOTA_NL_IHARDWARN);
662 goto error_return;
663 }
664 if (softlimit && total_count > softlimit) {
665 if ((timer != 0 && get_seconds() > timer) ||
666 (warns != 0 && warns >= warnlimit)) {
667 xfs_quota_warn(mp, dqp,
668 QUOTA_NL_ISOFTLONGWARN);
669 goto error_return;
670 }
671 xfs_quota_warn(mp, dqp, QUOTA_NL_ISOFTWARN);
672 }
673 }
674 }
675
676 /*
677 * Change the reservation, but not the actual usage.
678 * Note that q_res_bcount = q_core.d_bcount + resv
679 */
680 (*resbcountp) += (xfs_qcnt_t)nblks;
681 if (ninos != 0)
682 dqp->q_res_icount += (xfs_qcnt_t)ninos;
683
684 /*
685 * note the reservation amt in the trans struct too,
686 * so that the transaction knows how much was reserved by
687 * it against this particular dquot.
688 * We don't do this when we are reserving for a delayed allocation,
689 * because we don't have the luxury of a transaction envelope then.
690 */
691 if (tp) {
692 ASSERT(tp->t_dqinfo);
693 ASSERT(flags & XFS_QMOPT_RESBLK_MASK);
694 if (nblks != 0)
695 xfs_trans_mod_dquot(tp, dqp,
696 flags & XFS_QMOPT_RESBLK_MASK,
697 nblks);
698 if (ninos != 0)
699 xfs_trans_mod_dquot(tp, dqp,
700 XFS_TRANS_DQ_RES_INOS,
701 ninos);
702 }
703 ASSERT(dqp->q_res_bcount >= be64_to_cpu(dqp->q_core.d_bcount));
704 ASSERT(dqp->q_res_rtbcount >= be64_to_cpu(dqp->q_core.d_rtbcount));
705 ASSERT(dqp->q_res_icount >= be64_to_cpu(dqp->q_core.d_icount));
706
707 xfs_dqunlock(dqp);
708 return 0;
709
710error_return:
711 xfs_dqunlock(dqp);
712 if (flags & XFS_QMOPT_ENOSPC)
713 return -ENOSPC;
714 return -EDQUOT;
715}
716
717
718/*
719 * Given dquot(s), make disk block and/or inode reservations against them.
720 * The fact that this does the reservation against user, group and
721 * project quotas is important, because this follows a all-or-nothing
722 * approach.
723 *
724 * flags = XFS_QMOPT_FORCE_RES evades limit enforcement. Used by chown.
725 * XFS_QMOPT_ENOSPC returns ENOSPC not EDQUOT. Used by pquota.
726 * XFS_TRANS_DQ_RES_BLKS reserves regular disk blocks
727 * XFS_TRANS_DQ_RES_RTBLKS reserves realtime disk blocks
728 * dquots are unlocked on return, if they were not locked by caller.
729 */
730int
731xfs_trans_reserve_quota_bydquots(
732 struct xfs_trans *tp,
733 struct xfs_mount *mp,
734 struct xfs_dquot *udqp,
735 struct xfs_dquot *gdqp,
736 struct xfs_dquot *pdqp,
737 int64_t nblks,
738 long ninos,
739 uint flags)
740{
741 int error;
742
743 if (!XFS_IS_QUOTA_RUNNING(mp) || !XFS_IS_QUOTA_ON(mp))
744 return 0;
745
746 if (tp && tp->t_dqinfo == NULL)
747 xfs_trans_alloc_dqinfo(tp);
748
749 ASSERT(flags & XFS_QMOPT_RESBLK_MASK);
750
751 if (udqp) {
752 error = xfs_trans_dqresv(tp, mp, udqp, nblks, ninos,
753 (flags & ~XFS_QMOPT_ENOSPC));
754 if (error)
755 return error;
756 }
757
758 if (gdqp) {
759 error = xfs_trans_dqresv(tp, mp, gdqp, nblks, ninos, flags);
760 if (error)
761 goto unwind_usr;
762 }
763
764 if (pdqp) {
765 error = xfs_trans_dqresv(tp, mp, pdqp, nblks, ninos, flags);
766 if (error)
767 goto unwind_grp;
768 }
769
770 /*
771 * Didn't change anything critical, so, no need to log
772 */
773 return 0;
774
775unwind_grp:
776 flags |= XFS_QMOPT_FORCE_RES;
777 if (gdqp)
778 xfs_trans_dqresv(tp, mp, gdqp, -nblks, -ninos, flags);
779unwind_usr:
780 flags |= XFS_QMOPT_FORCE_RES;
781 if (udqp)
782 xfs_trans_dqresv(tp, mp, udqp, -nblks, -ninos, flags);
783 return error;
784}
785
786
787/*
788 * Lock the dquot and change the reservation if we can.
789 * This doesn't change the actual usage, just the reservation.
790 * The inode sent in is locked.
791 */
792int
793xfs_trans_reserve_quota_nblks(
794 struct xfs_trans *tp,
795 struct xfs_inode *ip,
796 int64_t nblks,
797 long ninos,
798 uint flags)
799{
800 struct xfs_mount *mp = ip->i_mount;
801
802 if (!XFS_IS_QUOTA_RUNNING(mp) || !XFS_IS_QUOTA_ON(mp))
803 return 0;
804 if (XFS_IS_PQUOTA_ON(mp))
805 flags |= XFS_QMOPT_ENOSPC;
806
807 ASSERT(!xfs_is_quota_inode(&mp->m_sb, ip->i_ino));
808
809 ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL));
810 ASSERT((flags & ~(XFS_QMOPT_FORCE_RES | XFS_QMOPT_ENOSPC)) ==
811 XFS_TRANS_DQ_RES_RTBLKS ||
812 (flags & ~(XFS_QMOPT_FORCE_RES | XFS_QMOPT_ENOSPC)) ==
813 XFS_TRANS_DQ_RES_BLKS);
814
815 /*
816 * Reserve nblks against these dquots, with trans as the mediator.
817 */
818 return xfs_trans_reserve_quota_bydquots(tp, mp,
819 ip->i_udquot, ip->i_gdquot,
820 ip->i_pdquot,
821 nblks, ninos, flags);
822}
823
824/*
825 * This routine is called to allocate a quotaoff log item.
826 */
827xfs_qoff_logitem_t *
828xfs_trans_get_qoff_item(
829 xfs_trans_t *tp,
830 xfs_qoff_logitem_t *startqoff,
831 uint flags)
832{
833 xfs_qoff_logitem_t *q;
834
835 ASSERT(tp != NULL);
836
837 q = xfs_qm_qoff_logitem_init(tp->t_mountp, startqoff, flags);
838 ASSERT(q != NULL);
839
840 /*
841 * Get a log_item_desc to point at the new item.
842 */
843 xfs_trans_add_item(tp, &q->qql_item);
844 return q;
845}
846
847
848/*
849 * This is called to mark the quotaoff logitem as needing
850 * to be logged when the transaction is committed. The logitem must
851 * already be associated with the given transaction.
852 */
853void
854xfs_trans_log_quotaoff_item(
855 xfs_trans_t *tp,
856 xfs_qoff_logitem_t *qlp)
857{
858 tp->t_flags |= XFS_TRANS_DIRTY;
859 set_bit(XFS_LI_DIRTY, &qlp->qql_item.li_flags);
860}
861
862STATIC void
863xfs_trans_alloc_dqinfo(
864 xfs_trans_t *tp)
865{
866 tp->t_dqinfo = kmem_zone_zalloc(xfs_qm_dqtrxzone, 0);
867}
868
869void
870xfs_trans_free_dqinfo(
871 xfs_trans_t *tp)
872{
873 if (!tp->t_dqinfo)
874 return;
875 kmem_zone_free(xfs_qm_dqtrxzone, tp->t_dqinfo);
876 tp->t_dqinfo = NULL;
877}