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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#include "xfs_trace.h"
19
20STATIC void xfs_trans_alloc_dqinfo(xfs_trans_t *);
21
22/*
23 * Add the locked dquot to the transaction.
24 * The dquot must be locked, and it cannot be associated with any
25 * transaction.
26 */
27void
28xfs_trans_dqjoin(
29 struct xfs_trans *tp,
30 struct xfs_dquot *dqp)
31{
32 ASSERT(XFS_DQ_IS_LOCKED(dqp));
33 ASSERT(dqp->q_logitem.qli_dquot == dqp);
34
35 /*
36 * Get a log_item_desc to point at the new item.
37 */
38 xfs_trans_add_item(tp, &dqp->q_logitem.qli_item);
39}
40
41/*
42 * This is called to mark the dquot as needing
43 * to be logged when the transaction is committed. The dquot must
44 * already be associated with the given transaction.
45 * Note that it marks the entire transaction as dirty. In the ordinary
46 * case, this gets called via xfs_trans_commit, after the transaction
47 * is already dirty. However, there's nothing stop this from getting
48 * called directly, as done by xfs_qm_scall_setqlim. Hence, the TRANS_DIRTY
49 * flag.
50 */
51void
52xfs_trans_log_dquot(
53 struct xfs_trans *tp,
54 struct xfs_dquot *dqp)
55{
56 ASSERT(XFS_DQ_IS_LOCKED(dqp));
57
58 tp->t_flags |= XFS_TRANS_DIRTY;
59 set_bit(XFS_LI_DIRTY, &dqp->q_logitem.qli_item.li_flags);
60}
61
62/*
63 * Carry forward whatever is left of the quota blk reservation to
64 * the spanky new transaction
65 */
66void
67xfs_trans_dup_dqinfo(
68 struct xfs_trans *otp,
69 struct xfs_trans *ntp)
70{
71 struct xfs_dqtrx *oq, *nq;
72 int i, j;
73 struct xfs_dqtrx *oqa, *nqa;
74 uint64_t blk_res_used;
75
76 if (!otp->t_dqinfo)
77 return;
78
79 xfs_trans_alloc_dqinfo(ntp);
80
81 /*
82 * Because the quota blk reservation is carried forward,
83 * it is also necessary to carry forward the DQ_DIRTY flag.
84 */
85 if (otp->t_flags & XFS_TRANS_DQ_DIRTY)
86 ntp->t_flags |= XFS_TRANS_DQ_DIRTY;
87
88 for (j = 0; j < XFS_QM_TRANS_DQTYPES; j++) {
89 oqa = otp->t_dqinfo->dqs[j];
90 nqa = ntp->t_dqinfo->dqs[j];
91 for (i = 0; i < XFS_QM_TRANS_MAXDQS; i++) {
92 blk_res_used = 0;
93
94 if (oqa[i].qt_dquot == NULL)
95 break;
96 oq = &oqa[i];
97 nq = &nqa[i];
98
99 if (oq->qt_blk_res && oq->qt_bcount_delta > 0)
100 blk_res_used = oq->qt_bcount_delta;
101
102 nq->qt_dquot = oq->qt_dquot;
103 nq->qt_bcount_delta = nq->qt_icount_delta = 0;
104 nq->qt_rtbcount_delta = 0;
105
106 /*
107 * Transfer whatever is left of the reservations.
108 */
109 nq->qt_blk_res = oq->qt_blk_res - blk_res_used;
110 oq->qt_blk_res = blk_res_used;
111
112 nq->qt_rtblk_res = oq->qt_rtblk_res -
113 oq->qt_rtblk_res_used;
114 oq->qt_rtblk_res = oq->qt_rtblk_res_used;
115
116 nq->qt_ino_res = oq->qt_ino_res - oq->qt_ino_res_used;
117 oq->qt_ino_res = oq->qt_ino_res_used;
118
119 }
120 }
121}
122
123/*
124 * Wrap around mod_dquot to account for both user and group quotas.
125 */
126void
127xfs_trans_mod_dquot_byino(
128 xfs_trans_t *tp,
129 xfs_inode_t *ip,
130 uint field,
131 int64_t delta)
132{
133 xfs_mount_t *mp = tp->t_mountp;
134
135 if (!XFS_IS_QUOTA_RUNNING(mp) ||
136 !XFS_IS_QUOTA_ON(mp) ||
137 xfs_is_quota_inode(&mp->m_sb, ip->i_ino))
138 return;
139
140 if (tp->t_dqinfo == NULL)
141 xfs_trans_alloc_dqinfo(tp);
142
143 if (XFS_IS_UQUOTA_ON(mp) && ip->i_udquot)
144 (void) xfs_trans_mod_dquot(tp, ip->i_udquot, field, delta);
145 if (XFS_IS_GQUOTA_ON(mp) && ip->i_gdquot)
146 (void) xfs_trans_mod_dquot(tp, ip->i_gdquot, field, delta);
147 if (XFS_IS_PQUOTA_ON(mp) && ip->i_pdquot)
148 (void) xfs_trans_mod_dquot(tp, ip->i_pdquot, field, delta);
149}
150
151STATIC struct xfs_dqtrx *
152xfs_trans_get_dqtrx(
153 struct xfs_trans *tp,
154 struct xfs_dquot *dqp)
155{
156 int i;
157 struct xfs_dqtrx *qa;
158
159 switch (xfs_dquot_type(dqp)) {
160 case XFS_DQTYPE_USER:
161 qa = tp->t_dqinfo->dqs[XFS_QM_TRANS_USR];
162 break;
163 case XFS_DQTYPE_GROUP:
164 qa = tp->t_dqinfo->dqs[XFS_QM_TRANS_GRP];
165 break;
166 case XFS_DQTYPE_PROJ:
167 qa = tp->t_dqinfo->dqs[XFS_QM_TRANS_PRJ];
168 break;
169 default:
170 return NULL;
171 }
172
173 for (i = 0; i < XFS_QM_TRANS_MAXDQS; i++) {
174 if (qa[i].qt_dquot == NULL ||
175 qa[i].qt_dquot == dqp)
176 return &qa[i];
177 }
178
179 return NULL;
180}
181
182/*
183 * Make the changes in the transaction structure.
184 * The moral equivalent to xfs_trans_mod_sb().
185 * We don't touch any fields in the dquot, so we don't care
186 * if it's locked or not (most of the time it won't be).
187 */
188void
189xfs_trans_mod_dquot(
190 struct xfs_trans *tp,
191 struct xfs_dquot *dqp,
192 uint field,
193 int64_t delta)
194{
195 struct xfs_dqtrx *qtrx;
196
197 ASSERT(tp);
198 ASSERT(XFS_IS_QUOTA_RUNNING(tp->t_mountp));
199 qtrx = NULL;
200
201 if (tp->t_dqinfo == NULL)
202 xfs_trans_alloc_dqinfo(tp);
203 /*
204 * Find either the first free slot or the slot that belongs
205 * to this dquot.
206 */
207 qtrx = xfs_trans_get_dqtrx(tp, dqp);
208 ASSERT(qtrx);
209 if (qtrx->qt_dquot == NULL)
210 qtrx->qt_dquot = dqp;
211
212 if (delta) {
213 trace_xfs_trans_mod_dquot_before(qtrx);
214 trace_xfs_trans_mod_dquot(tp, dqp, field, delta);
215 }
216
217 switch (field) {
218
219 /*
220 * regular disk blk reservation
221 */
222 case XFS_TRANS_DQ_RES_BLKS:
223 qtrx->qt_blk_res += delta;
224 break;
225
226 /*
227 * inode reservation
228 */
229 case XFS_TRANS_DQ_RES_INOS:
230 qtrx->qt_ino_res += delta;
231 break;
232
233 /*
234 * disk blocks used.
235 */
236 case XFS_TRANS_DQ_BCOUNT:
237 qtrx->qt_bcount_delta += delta;
238 break;
239
240 case XFS_TRANS_DQ_DELBCOUNT:
241 qtrx->qt_delbcnt_delta += delta;
242 break;
243
244 /*
245 * Inode Count
246 */
247 case XFS_TRANS_DQ_ICOUNT:
248 if (qtrx->qt_ino_res && delta > 0) {
249 qtrx->qt_ino_res_used += delta;
250 ASSERT(qtrx->qt_ino_res >= qtrx->qt_ino_res_used);
251 }
252 qtrx->qt_icount_delta += delta;
253 break;
254
255 /*
256 * rtblk reservation
257 */
258 case XFS_TRANS_DQ_RES_RTBLKS:
259 qtrx->qt_rtblk_res += delta;
260 break;
261
262 /*
263 * rtblk count
264 */
265 case XFS_TRANS_DQ_RTBCOUNT:
266 if (qtrx->qt_rtblk_res && delta > 0) {
267 qtrx->qt_rtblk_res_used += delta;
268 ASSERT(qtrx->qt_rtblk_res >= qtrx->qt_rtblk_res_used);
269 }
270 qtrx->qt_rtbcount_delta += delta;
271 break;
272
273 case XFS_TRANS_DQ_DELRTBCOUNT:
274 qtrx->qt_delrtb_delta += delta;
275 break;
276
277 default:
278 ASSERT(0);
279 }
280
281 if (delta)
282 trace_xfs_trans_mod_dquot_after(qtrx);
283
284 tp->t_flags |= XFS_TRANS_DQ_DIRTY;
285}
286
287
288/*
289 * Given an array of dqtrx structures, lock all the dquots associated and join
290 * them to the transaction, provided they have been modified. We know that the
291 * highest number of dquots of one type - usr, grp and prj - involved in a
292 * transaction is 3 so we don't need to make this very generic.
293 */
294STATIC void
295xfs_trans_dqlockedjoin(
296 struct xfs_trans *tp,
297 struct xfs_dqtrx *q)
298{
299 ASSERT(q[0].qt_dquot != NULL);
300 if (q[1].qt_dquot == NULL) {
301 xfs_dqlock(q[0].qt_dquot);
302 xfs_trans_dqjoin(tp, q[0].qt_dquot);
303 } else {
304 ASSERT(XFS_QM_TRANS_MAXDQS == 2);
305 xfs_dqlock2(q[0].qt_dquot, q[1].qt_dquot);
306 xfs_trans_dqjoin(tp, q[0].qt_dquot);
307 xfs_trans_dqjoin(tp, q[1].qt_dquot);
308 }
309}
310
311/* Apply dqtrx changes to the quota reservation counters. */
312static inline void
313xfs_apply_quota_reservation_deltas(
314 struct xfs_dquot_res *res,
315 uint64_t reserved,
316 int64_t res_used,
317 int64_t count_delta)
318{
319 if (reserved != 0) {
320 /*
321 * Subtle math here: If reserved > res_used (the normal case),
322 * we're simply subtracting the unused transaction quota
323 * reservation from the dquot reservation.
324 *
325 * If, however, res_used > reserved, then we have allocated
326 * more quota blocks than were reserved for the transaction.
327 * We must add that excess to the dquot reservation since it
328 * tracks (usage + resv) and by definition we didn't reserve
329 * that excess.
330 */
331 res->reserved -= abs(reserved - res_used);
332 } else if (count_delta != 0) {
333 /*
334 * These blks were never reserved, either inside a transaction
335 * or outside one (in a delayed allocation). Also, this isn't
336 * always a negative number since we sometimes deliberately
337 * skip quota reservations.
338 */
339 res->reserved += count_delta;
340 }
341}
342
343/*
344 * Called by xfs_trans_commit() and similar in spirit to
345 * xfs_trans_apply_sb_deltas().
346 * Go thru all the dquots belonging to this transaction and modify the
347 * INCORE dquot to reflect the actual usages.
348 * Unreserve just the reservations done by this transaction.
349 * dquot is still left locked at exit.
350 */
351void
352xfs_trans_apply_dquot_deltas(
353 struct xfs_trans *tp)
354{
355 int i, j;
356 struct xfs_dquot *dqp;
357 struct xfs_dqtrx *qtrx, *qa;
358 int64_t totalbdelta;
359 int64_t totalrtbdelta;
360
361 if (!(tp->t_flags & XFS_TRANS_DQ_DIRTY))
362 return;
363
364 ASSERT(tp->t_dqinfo);
365 for (j = 0; j < XFS_QM_TRANS_DQTYPES; j++) {
366 qa = tp->t_dqinfo->dqs[j];
367 if (qa[0].qt_dquot == NULL)
368 continue;
369
370 /*
371 * Lock all of the dquots and join them to the transaction.
372 */
373 xfs_trans_dqlockedjoin(tp, qa);
374
375 for (i = 0; i < XFS_QM_TRANS_MAXDQS; i++) {
376 uint64_t blk_res_used;
377
378 qtrx = &qa[i];
379 /*
380 * The array of dquots is filled
381 * sequentially, not sparsely.
382 */
383 if ((dqp = qtrx->qt_dquot) == NULL)
384 break;
385
386 ASSERT(XFS_DQ_IS_LOCKED(dqp));
387
388 /*
389 * adjust the actual number of blocks used
390 */
391
392 /*
393 * The issue here is - sometimes we don't make a blkquota
394 * reservation intentionally to be fair to users
395 * (when the amount is small). On the other hand,
396 * delayed allocs do make reservations, but that's
397 * outside of a transaction, so we have no
398 * idea how much was really reserved.
399 * So, here we've accumulated delayed allocation blks and
400 * non-delay blks. The assumption is that the
401 * delayed ones are always reserved (outside of a
402 * transaction), and the others may or may not have
403 * quota reservations.
404 */
405 totalbdelta = qtrx->qt_bcount_delta +
406 qtrx->qt_delbcnt_delta;
407 totalrtbdelta = qtrx->qt_rtbcount_delta +
408 qtrx->qt_delrtb_delta;
409
410 if (totalbdelta != 0 || totalrtbdelta != 0 ||
411 qtrx->qt_icount_delta != 0) {
412 trace_xfs_trans_apply_dquot_deltas_before(dqp);
413 trace_xfs_trans_apply_dquot_deltas(qtrx);
414 }
415
416#ifdef DEBUG
417 if (totalbdelta < 0)
418 ASSERT(dqp->q_blk.count >= -totalbdelta);
419
420 if (totalrtbdelta < 0)
421 ASSERT(dqp->q_rtb.count >= -totalrtbdelta);
422
423 if (qtrx->qt_icount_delta < 0)
424 ASSERT(dqp->q_ino.count >= -qtrx->qt_icount_delta);
425#endif
426 if (totalbdelta)
427 dqp->q_blk.count += totalbdelta;
428
429 if (qtrx->qt_icount_delta)
430 dqp->q_ino.count += qtrx->qt_icount_delta;
431
432 if (totalrtbdelta)
433 dqp->q_rtb.count += totalrtbdelta;
434
435 if (totalbdelta != 0 || totalrtbdelta != 0 ||
436 qtrx->qt_icount_delta != 0)
437 trace_xfs_trans_apply_dquot_deltas_after(dqp);
438
439 /*
440 * Get any default limits in use.
441 * Start/reset the timer(s) if needed.
442 */
443 if (dqp->q_id) {
444 xfs_qm_adjust_dqlimits(dqp);
445 xfs_qm_adjust_dqtimers(dqp);
446 }
447
448 dqp->q_flags |= XFS_DQFLAG_DIRTY;
449 /*
450 * add this to the list of items to get logged
451 */
452 xfs_trans_log_dquot(tp, dqp);
453 /*
454 * Take off what's left of the original reservation.
455 * In case of delayed allocations, there's no
456 * reservation that a transaction structure knows of.
457 */
458 blk_res_used = max_t(int64_t, 0, qtrx->qt_bcount_delta);
459 xfs_apply_quota_reservation_deltas(&dqp->q_blk,
460 qtrx->qt_blk_res, blk_res_used,
461 qtrx->qt_bcount_delta);
462
463 /*
464 * Adjust the RT reservation.
465 */
466 xfs_apply_quota_reservation_deltas(&dqp->q_rtb,
467 qtrx->qt_rtblk_res,
468 qtrx->qt_rtblk_res_used,
469 qtrx->qt_rtbcount_delta);
470
471 /*
472 * Adjust the inode reservation.
473 */
474 ASSERT(qtrx->qt_ino_res >= qtrx->qt_ino_res_used);
475 xfs_apply_quota_reservation_deltas(&dqp->q_ino,
476 qtrx->qt_ino_res,
477 qtrx->qt_ino_res_used,
478 qtrx->qt_icount_delta);
479
480 ASSERT(dqp->q_blk.reserved >= dqp->q_blk.count);
481 ASSERT(dqp->q_ino.reserved >= dqp->q_ino.count);
482 ASSERT(dqp->q_rtb.reserved >= dqp->q_rtb.count);
483 }
484 }
485}
486
487/*
488 * Release the reservations, and adjust the dquots accordingly.
489 * This is called only when the transaction is being aborted. If by
490 * any chance we have done dquot modifications incore (ie. deltas) already,
491 * we simply throw those away, since that's the expected behavior
492 * when a transaction is curtailed without a commit.
493 */
494void
495xfs_trans_unreserve_and_mod_dquots(
496 struct xfs_trans *tp)
497{
498 int i, j;
499 struct xfs_dquot *dqp;
500 struct xfs_dqtrx *qtrx, *qa;
501 bool locked;
502
503 if (!tp->t_dqinfo || !(tp->t_flags & XFS_TRANS_DQ_DIRTY))
504 return;
505
506 for (j = 0; j < XFS_QM_TRANS_DQTYPES; j++) {
507 qa = tp->t_dqinfo->dqs[j];
508
509 for (i = 0; i < XFS_QM_TRANS_MAXDQS; i++) {
510 qtrx = &qa[i];
511 /*
512 * We assume that the array of dquots is filled
513 * sequentially, not sparsely.
514 */
515 if ((dqp = qtrx->qt_dquot) == NULL)
516 break;
517 /*
518 * Unreserve the original reservation. We don't care
519 * about the number of blocks used field, or deltas.
520 * Also we don't bother to zero the fields.
521 */
522 locked = false;
523 if (qtrx->qt_blk_res) {
524 xfs_dqlock(dqp);
525 locked = true;
526 dqp->q_blk.reserved -=
527 (xfs_qcnt_t)qtrx->qt_blk_res;
528 }
529 if (qtrx->qt_ino_res) {
530 if (!locked) {
531 xfs_dqlock(dqp);
532 locked = true;
533 }
534 dqp->q_ino.reserved -=
535 (xfs_qcnt_t)qtrx->qt_ino_res;
536 }
537
538 if (qtrx->qt_rtblk_res) {
539 if (!locked) {
540 xfs_dqlock(dqp);
541 locked = true;
542 }
543 dqp->q_rtb.reserved -=
544 (xfs_qcnt_t)qtrx->qt_rtblk_res;
545 }
546 if (locked)
547 xfs_dqunlock(dqp);
548
549 }
550 }
551}
552
553STATIC void
554xfs_quota_warn(
555 struct xfs_mount *mp,
556 struct xfs_dquot *dqp,
557 int type)
558{
559 enum quota_type qtype;
560
561 switch (xfs_dquot_type(dqp)) {
562 case XFS_DQTYPE_PROJ:
563 qtype = PRJQUOTA;
564 break;
565 case XFS_DQTYPE_USER:
566 qtype = USRQUOTA;
567 break;
568 case XFS_DQTYPE_GROUP:
569 qtype = GRPQUOTA;
570 break;
571 default:
572 return;
573 }
574
575 quota_send_warning(make_kqid(&init_user_ns, qtype, dqp->q_id),
576 mp->m_super->s_dev, type);
577}
578
579/*
580 * Decide if we can make an additional reservation against a quota resource.
581 * Returns an inode QUOTA_NL_ warning code and whether or not it's fatal.
582 *
583 * Note that we assume that the numeric difference between the inode and block
584 * warning codes will always be 3 since it's userspace ABI now, and will never
585 * decrease the quota reservation, so the *BELOW messages are irrelevant.
586 */
587static inline int
588xfs_dqresv_check(
589 struct xfs_dquot_res *res,
590 struct xfs_quota_limits *qlim,
591 int64_t delta,
592 bool *fatal)
593{
594 xfs_qcnt_t hardlimit = res->hardlimit;
595 xfs_qcnt_t softlimit = res->softlimit;
596 xfs_qcnt_t total_count = res->reserved + delta;
597
598 BUILD_BUG_ON(QUOTA_NL_BHARDWARN != QUOTA_NL_IHARDWARN + 3);
599 BUILD_BUG_ON(QUOTA_NL_BSOFTLONGWARN != QUOTA_NL_ISOFTLONGWARN + 3);
600 BUILD_BUG_ON(QUOTA_NL_BSOFTWARN != QUOTA_NL_ISOFTWARN + 3);
601
602 *fatal = false;
603 if (delta <= 0)
604 return QUOTA_NL_NOWARN;
605
606 if (!hardlimit)
607 hardlimit = qlim->hard;
608 if (!softlimit)
609 softlimit = qlim->soft;
610
611 if (hardlimit && total_count > hardlimit) {
612 *fatal = true;
613 return QUOTA_NL_IHARDWARN;
614 }
615
616 if (softlimit && total_count > softlimit) {
617 time64_t now = ktime_get_real_seconds();
618
619 if ((res->timer != 0 && now > res->timer) ||
620 (res->warnings != 0 && res->warnings >= qlim->warn)) {
621 *fatal = true;
622 return QUOTA_NL_ISOFTLONGWARN;
623 }
624
625 res->warnings++;
626 return QUOTA_NL_ISOFTWARN;
627 }
628
629 return QUOTA_NL_NOWARN;
630}
631
632/*
633 * This reserves disk blocks and inodes against a dquot.
634 * Flags indicate if the dquot is to be locked here and also
635 * if the blk reservation is for RT or regular blocks.
636 * Sending in XFS_QMOPT_FORCE_RES flag skips the quota check.
637 */
638STATIC int
639xfs_trans_dqresv(
640 struct xfs_trans *tp,
641 struct xfs_mount *mp,
642 struct xfs_dquot *dqp,
643 int64_t nblks,
644 long ninos,
645 uint flags)
646{
647 struct xfs_quotainfo *q = mp->m_quotainfo;
648 struct xfs_def_quota *defq;
649 struct xfs_dquot_res *blkres;
650 struct xfs_quota_limits *qlim;
651
652 xfs_dqlock(dqp);
653
654 defq = xfs_get_defquota(q, xfs_dquot_type(dqp));
655
656 if (flags & XFS_TRANS_DQ_RES_BLKS) {
657 blkres = &dqp->q_blk;
658 qlim = &defq->blk;
659 } else {
660 blkres = &dqp->q_rtb;
661 qlim = &defq->rtb;
662 }
663
664 if ((flags & XFS_QMOPT_FORCE_RES) == 0 && dqp->q_id &&
665 xfs_dquot_is_enforced(dqp)) {
666 int quota_nl;
667 bool fatal;
668
669 /*
670 * dquot is locked already. See if we'd go over the hardlimit
671 * or exceed the timelimit if we'd reserve resources.
672 */
673 quota_nl = xfs_dqresv_check(blkres, qlim, nblks, &fatal);
674 if (quota_nl != QUOTA_NL_NOWARN) {
675 /*
676 * Quota block warning codes are 3 more than the inode
677 * codes, which we check above.
678 */
679 xfs_quota_warn(mp, dqp, quota_nl + 3);
680 if (fatal)
681 goto error_return;
682 }
683
684 quota_nl = xfs_dqresv_check(&dqp->q_ino, &defq->ino, ninos,
685 &fatal);
686 if (quota_nl != QUOTA_NL_NOWARN) {
687 xfs_quota_warn(mp, dqp, quota_nl);
688 if (fatal)
689 goto error_return;
690 }
691 }
692
693 /*
694 * Change the reservation, but not the actual usage.
695 * Note that q_blk.reserved = q_blk.count + resv
696 */
697 blkres->reserved += (xfs_qcnt_t)nblks;
698 dqp->q_ino.reserved += (xfs_qcnt_t)ninos;
699
700 /*
701 * note the reservation amt in the trans struct too,
702 * so that the transaction knows how much was reserved by
703 * it against this particular dquot.
704 * We don't do this when we are reserving for a delayed allocation,
705 * because we don't have the luxury of a transaction envelope then.
706 */
707 if (tp) {
708 ASSERT(tp->t_dqinfo);
709 ASSERT(flags & XFS_QMOPT_RESBLK_MASK);
710 if (nblks != 0)
711 xfs_trans_mod_dquot(tp, dqp,
712 flags & XFS_QMOPT_RESBLK_MASK,
713 nblks);
714 if (ninos != 0)
715 xfs_trans_mod_dquot(tp, dqp,
716 XFS_TRANS_DQ_RES_INOS,
717 ninos);
718 }
719 ASSERT(dqp->q_blk.reserved >= dqp->q_blk.count);
720 ASSERT(dqp->q_rtb.reserved >= dqp->q_rtb.count);
721 ASSERT(dqp->q_ino.reserved >= dqp->q_ino.count);
722
723 xfs_dqunlock(dqp);
724 return 0;
725
726error_return:
727 xfs_dqunlock(dqp);
728 if (xfs_dquot_type(dqp) == XFS_DQTYPE_PROJ)
729 return -ENOSPC;
730 return -EDQUOT;
731}
732
733
734/*
735 * Given dquot(s), make disk block and/or inode reservations against them.
736 * The fact that this does the reservation against user, group and
737 * project quotas is important, because this follows a all-or-nothing
738 * approach.
739 *
740 * flags = XFS_QMOPT_FORCE_RES evades limit enforcement. Used by chown.
741 * XFS_QMOPT_ENOSPC returns ENOSPC not EDQUOT. Used by pquota.
742 * XFS_TRANS_DQ_RES_BLKS reserves regular disk blocks
743 * XFS_TRANS_DQ_RES_RTBLKS reserves realtime disk blocks
744 * dquots are unlocked on return, if they were not locked by caller.
745 */
746int
747xfs_trans_reserve_quota_bydquots(
748 struct xfs_trans *tp,
749 struct xfs_mount *mp,
750 struct xfs_dquot *udqp,
751 struct xfs_dquot *gdqp,
752 struct xfs_dquot *pdqp,
753 int64_t nblks,
754 long ninos,
755 uint flags)
756{
757 int 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, flags);
769 if (error)
770 return error;
771 }
772
773 if (gdqp) {
774 error = xfs_trans_dqresv(tp, mp, gdqp, nblks, ninos, flags);
775 if (error)
776 goto unwind_usr;
777 }
778
779 if (pdqp) {
780 error = xfs_trans_dqresv(tp, mp, pdqp, nblks, ninos, flags);
781 if (error)
782 goto unwind_grp;
783 }
784
785 /*
786 * Didn't change anything critical, so, no need to log
787 */
788 return 0;
789
790unwind_grp:
791 flags |= XFS_QMOPT_FORCE_RES;
792 if (gdqp)
793 xfs_trans_dqresv(tp, mp, gdqp, -nblks, -ninos, flags);
794unwind_usr:
795 flags |= XFS_QMOPT_FORCE_RES;
796 if (udqp)
797 xfs_trans_dqresv(tp, mp, udqp, -nblks, -ninos, flags);
798 return error;
799}
800
801
802/*
803 * Lock the dquot and change the reservation if we can.
804 * This doesn't change the actual usage, just the reservation.
805 * The inode sent in is locked.
806 */
807int
808xfs_trans_reserve_quota_nblks(
809 struct xfs_trans *tp,
810 struct xfs_inode *ip,
811 int64_t nblks,
812 long ninos,
813 uint flags)
814{
815 struct xfs_mount *mp = ip->i_mount;
816
817 if (!XFS_IS_QUOTA_RUNNING(mp) || !XFS_IS_QUOTA_ON(mp))
818 return 0;
819
820 ASSERT(!xfs_is_quota_inode(&mp->m_sb, ip->i_ino));
821
822 ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL));
823 ASSERT((flags & ~(XFS_QMOPT_FORCE_RES)) == XFS_TRANS_DQ_RES_RTBLKS ||
824 (flags & ~(XFS_QMOPT_FORCE_RES)) == 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 ip->i_pdquot,
832 nblks, ninos, flags);
833}
834
835/*
836 * This routine is called to allocate a quotaoff log item.
837 */
838struct xfs_qoff_logitem *
839xfs_trans_get_qoff_item(
840 struct xfs_trans *tp,
841 struct xfs_qoff_logitem *startqoff,
842 uint flags)
843{
844 struct xfs_qoff_logitem *q;
845
846 ASSERT(tp != NULL);
847
848 q = xfs_qm_qoff_logitem_init(tp->t_mountp, startqoff, flags);
849 ASSERT(q != NULL);
850
851 /*
852 * Get a log_item_desc to point at the new item.
853 */
854 xfs_trans_add_item(tp, &q->qql_item);
855 return q;
856}
857
858
859/*
860 * This is called to mark the quotaoff logitem as needing
861 * to be logged when the transaction is committed. The logitem must
862 * already be associated with the given transaction.
863 */
864void
865xfs_trans_log_quotaoff_item(
866 struct xfs_trans *tp,
867 struct xfs_qoff_logitem *qlp)
868{
869 tp->t_flags |= XFS_TRANS_DIRTY;
870 set_bit(XFS_LI_DIRTY, &qlp->qql_item.li_flags);
871}
872
873STATIC void
874xfs_trans_alloc_dqinfo(
875 xfs_trans_t *tp)
876{
877 tp->t_dqinfo = kmem_cache_zalloc(xfs_qm_dqtrxzone,
878 GFP_KERNEL | __GFP_NOFAIL);
879}
880
881void
882xfs_trans_free_dqinfo(
883 xfs_trans_t *tp)
884{
885 if (!tp->t_dqinfo)
886 return;
887 kmem_cache_free(xfs_qm_dqtrxzone, tp->t_dqinfo);
888 tp->t_dqinfo = NULL;
889}