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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#include "xfs_error.h"
20
21STATIC void xfs_trans_alloc_dqinfo(xfs_trans_t *);
22
23/*
24 * Add the locked dquot to the transaction.
25 * The dquot must be locked, and it cannot be associated with any
26 * transaction.
27 */
28void
29xfs_trans_dqjoin(
30 struct xfs_trans *tp,
31 struct xfs_dquot *dqp)
32{
33 ASSERT(XFS_DQ_IS_LOCKED(dqp));
34 ASSERT(dqp->q_logitem.qli_dquot == dqp);
35
36 /*
37 * Get a log_item_desc to point at the new item.
38 */
39 xfs_trans_add_item(tp, &dqp->q_logitem.qli_item);
40}
41
42/*
43 * This is called to mark the dquot as needing
44 * to be logged when the transaction is committed. The dquot must
45 * already be associated with the given transaction.
46 * Note that it marks the entire transaction as dirty. In the ordinary
47 * case, this gets called via xfs_trans_commit, after the transaction
48 * is already dirty. However, there's nothing stop this from getting
49 * called directly, as done by xfs_qm_scall_setqlim. Hence, the TRANS_DIRTY
50 * flag.
51 */
52void
53xfs_trans_log_dquot(
54 struct xfs_trans *tp,
55 struct xfs_dquot *dqp)
56{
57 ASSERT(XFS_DQ_IS_LOCKED(dqp));
58
59 /* Upgrade the dquot to bigtime format if possible. */
60 if (dqp->q_id != 0 &&
61 xfs_has_bigtime(tp->t_mountp) &&
62 !(dqp->q_type & XFS_DQTYPE_BIGTIME))
63 dqp->q_type |= XFS_DQTYPE_BIGTIME;
64
65 tp->t_flags |= XFS_TRANS_DIRTY;
66 set_bit(XFS_LI_DIRTY, &dqp->q_logitem.qli_item.li_flags);
67}
68
69/*
70 * Carry forward whatever is left of the quota blk reservation to
71 * the spanky new transaction
72 */
73void
74xfs_trans_dup_dqinfo(
75 struct xfs_trans *otp,
76 struct xfs_trans *ntp)
77{
78 struct xfs_dqtrx *oq, *nq;
79 int i, j;
80 struct xfs_dqtrx *oqa, *nqa;
81 uint64_t blk_res_used;
82
83 if (!otp->t_dqinfo)
84 return;
85
86 xfs_trans_alloc_dqinfo(ntp);
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_ON(mp) ||
136 xfs_is_quota_inode(&mp->m_sb, ip->i_ino))
137 return;
138
139 if (XFS_IS_UQUOTA_ON(mp) && ip->i_udquot)
140 (void) xfs_trans_mod_dquot(tp, ip->i_udquot, field, delta);
141 if (XFS_IS_GQUOTA_ON(mp) && ip->i_gdquot)
142 (void) xfs_trans_mod_dquot(tp, ip->i_gdquot, field, delta);
143 if (XFS_IS_PQUOTA_ON(mp) && ip->i_pdquot)
144 (void) xfs_trans_mod_dquot(tp, ip->i_pdquot, field, delta);
145}
146
147STATIC struct xfs_dqtrx *
148xfs_trans_get_dqtrx(
149 struct xfs_trans *tp,
150 struct xfs_dquot *dqp)
151{
152 int i;
153 struct xfs_dqtrx *qa;
154
155 switch (xfs_dquot_type(dqp)) {
156 case XFS_DQTYPE_USER:
157 qa = tp->t_dqinfo->dqs[XFS_QM_TRANS_USR];
158 break;
159 case XFS_DQTYPE_GROUP:
160 qa = tp->t_dqinfo->dqs[XFS_QM_TRANS_GRP];
161 break;
162 case XFS_DQTYPE_PROJ:
163 qa = tp->t_dqinfo->dqs[XFS_QM_TRANS_PRJ];
164 break;
165 default:
166 return NULL;
167 }
168
169 for (i = 0; i < XFS_QM_TRANS_MAXDQS; i++) {
170 if (qa[i].qt_dquot == NULL ||
171 qa[i].qt_dquot == dqp)
172 return &qa[i];
173 }
174
175 return NULL;
176}
177
178/*
179 * Make the changes in the transaction structure.
180 * The moral equivalent to xfs_trans_mod_sb().
181 * We don't touch any fields in the dquot, so we don't care
182 * if it's locked or not (most of the time it won't be).
183 */
184void
185xfs_trans_mod_dquot(
186 struct xfs_trans *tp,
187 struct xfs_dquot *dqp,
188 uint field,
189 int64_t delta)
190{
191 struct xfs_dqtrx *qtrx;
192
193 ASSERT(tp);
194 ASSERT(XFS_IS_QUOTA_ON(tp->t_mountp));
195 qtrx = NULL;
196
197 if (!delta)
198 return;
199
200 if (tp->t_dqinfo == NULL)
201 xfs_trans_alloc_dqinfo(tp);
202 /*
203 * Find either the first free slot or the slot that belongs
204 * to this dquot.
205 */
206 qtrx = xfs_trans_get_dqtrx(tp, dqp);
207 ASSERT(qtrx);
208 if (qtrx->qt_dquot == NULL)
209 qtrx->qt_dquot = dqp;
210
211 trace_xfs_trans_mod_dquot_before(qtrx);
212 trace_xfs_trans_mod_dquot(tp, dqp, field, delta);
213
214 switch (field) {
215 /* regular disk blk reservation */
216 case XFS_TRANS_DQ_RES_BLKS:
217 qtrx->qt_blk_res += delta;
218 break;
219
220 /* inode reservation */
221 case XFS_TRANS_DQ_RES_INOS:
222 qtrx->qt_ino_res += delta;
223 break;
224
225 /* disk blocks used. */
226 case XFS_TRANS_DQ_BCOUNT:
227 qtrx->qt_bcount_delta += delta;
228 break;
229
230 case XFS_TRANS_DQ_DELBCOUNT:
231 qtrx->qt_delbcnt_delta += delta;
232 break;
233
234 /* Inode Count */
235 case XFS_TRANS_DQ_ICOUNT:
236 if (qtrx->qt_ino_res && delta > 0) {
237 qtrx->qt_ino_res_used += delta;
238 ASSERT(qtrx->qt_ino_res >= qtrx->qt_ino_res_used);
239 }
240 qtrx->qt_icount_delta += delta;
241 break;
242
243 /* rtblk reservation */
244 case XFS_TRANS_DQ_RES_RTBLKS:
245 qtrx->qt_rtblk_res += delta;
246 break;
247
248 /* rtblk count */
249 case XFS_TRANS_DQ_RTBCOUNT:
250 if (qtrx->qt_rtblk_res && delta > 0) {
251 qtrx->qt_rtblk_res_used += delta;
252 ASSERT(qtrx->qt_rtblk_res >= qtrx->qt_rtblk_res_used);
253 }
254 qtrx->qt_rtbcount_delta += delta;
255 break;
256
257 case XFS_TRANS_DQ_DELRTBCOUNT:
258 qtrx->qt_delrtb_delta += delta;
259 break;
260
261 default:
262 ASSERT(0);
263 }
264
265 trace_xfs_trans_mod_dquot_after(qtrx);
266}
267
268
269/*
270 * Given an array of dqtrx structures, lock all the dquots associated and join
271 * them to the transaction, provided they have been modified. We know that the
272 * highest number of dquots of one type - usr, grp and prj - involved in a
273 * transaction is 3 so we don't need to make this very generic.
274 */
275STATIC void
276xfs_trans_dqlockedjoin(
277 struct xfs_trans *tp,
278 struct xfs_dqtrx *q)
279{
280 ASSERT(q[0].qt_dquot != NULL);
281 if (q[1].qt_dquot == NULL) {
282 xfs_dqlock(q[0].qt_dquot);
283 xfs_trans_dqjoin(tp, q[0].qt_dquot);
284 } else {
285 ASSERT(XFS_QM_TRANS_MAXDQS == 2);
286 xfs_dqlock2(q[0].qt_dquot, q[1].qt_dquot);
287 xfs_trans_dqjoin(tp, q[0].qt_dquot);
288 xfs_trans_dqjoin(tp, q[1].qt_dquot);
289 }
290}
291
292/* Apply dqtrx changes to the quota reservation counters. */
293static inline void
294xfs_apply_quota_reservation_deltas(
295 struct xfs_dquot_res *res,
296 uint64_t reserved,
297 int64_t res_used,
298 int64_t count_delta)
299{
300 if (reserved != 0) {
301 /*
302 * Subtle math here: If reserved > res_used (the normal case),
303 * we're simply subtracting the unused transaction quota
304 * reservation from the dquot reservation.
305 *
306 * If, however, res_used > reserved, then we have allocated
307 * more quota blocks than were reserved for the transaction.
308 * We must add that excess to the dquot reservation since it
309 * tracks (usage + resv) and by definition we didn't reserve
310 * that excess.
311 */
312 res->reserved -= abs(reserved - res_used);
313 } else if (count_delta != 0) {
314 /*
315 * These blks were never reserved, either inside a transaction
316 * or outside one (in a delayed allocation). Also, this isn't
317 * always a negative number since we sometimes deliberately
318 * skip quota reservations.
319 */
320 res->reserved += count_delta;
321 }
322}
323
324/*
325 * Called by xfs_trans_commit() and similar in spirit to
326 * xfs_trans_apply_sb_deltas().
327 * Go thru all the dquots belonging to this transaction and modify the
328 * INCORE dquot to reflect the actual usages.
329 * Unreserve just the reservations done by this transaction.
330 * dquot is still left locked at exit.
331 */
332void
333xfs_trans_apply_dquot_deltas(
334 struct xfs_trans *tp)
335{
336 int i, j;
337 struct xfs_dquot *dqp;
338 struct xfs_dqtrx *qtrx, *qa;
339 int64_t totalbdelta;
340 int64_t totalrtbdelta;
341
342 if (!tp->t_dqinfo)
343 return;
344
345 ASSERT(tp->t_dqinfo);
346 for (j = 0; j < XFS_QM_TRANS_DQTYPES; j++) {
347 qa = tp->t_dqinfo->dqs[j];
348 if (qa[0].qt_dquot == NULL)
349 continue;
350
351 /*
352 * Lock all of the dquots and join them to the transaction.
353 */
354 xfs_trans_dqlockedjoin(tp, qa);
355
356 for (i = 0; i < XFS_QM_TRANS_MAXDQS; i++) {
357 uint64_t blk_res_used;
358
359 qtrx = &qa[i];
360 /*
361 * The array of dquots is filled
362 * sequentially, not sparsely.
363 */
364 if ((dqp = qtrx->qt_dquot) == NULL)
365 break;
366
367 ASSERT(XFS_DQ_IS_LOCKED(dqp));
368
369 /*
370 * adjust the actual number of blocks used
371 */
372
373 /*
374 * The issue here is - sometimes we don't make a blkquota
375 * reservation intentionally to be fair to users
376 * (when the amount is small). On the other hand,
377 * delayed allocs do make reservations, but that's
378 * outside of a transaction, so we have no
379 * idea how much was really reserved.
380 * So, here we've accumulated delayed allocation blks and
381 * non-delay blks. The assumption is that the
382 * delayed ones are always reserved (outside of a
383 * transaction), and the others may or may not have
384 * quota reservations.
385 */
386 totalbdelta = qtrx->qt_bcount_delta +
387 qtrx->qt_delbcnt_delta;
388 totalrtbdelta = qtrx->qt_rtbcount_delta +
389 qtrx->qt_delrtb_delta;
390
391 if (totalbdelta != 0 || totalrtbdelta != 0 ||
392 qtrx->qt_icount_delta != 0) {
393 trace_xfs_trans_apply_dquot_deltas_before(dqp);
394 trace_xfs_trans_apply_dquot_deltas(qtrx);
395 }
396
397#ifdef DEBUG
398 if (totalbdelta < 0)
399 ASSERT(dqp->q_blk.count >= -totalbdelta);
400
401 if (totalrtbdelta < 0)
402 ASSERT(dqp->q_rtb.count >= -totalrtbdelta);
403
404 if (qtrx->qt_icount_delta < 0)
405 ASSERT(dqp->q_ino.count >= -qtrx->qt_icount_delta);
406#endif
407 if (totalbdelta)
408 dqp->q_blk.count += totalbdelta;
409
410 if (qtrx->qt_icount_delta)
411 dqp->q_ino.count += qtrx->qt_icount_delta;
412
413 if (totalrtbdelta)
414 dqp->q_rtb.count += totalrtbdelta;
415
416 if (totalbdelta != 0 || totalrtbdelta != 0 ||
417 qtrx->qt_icount_delta != 0)
418 trace_xfs_trans_apply_dquot_deltas_after(dqp);
419
420 /*
421 * Get any default limits in use.
422 * Start/reset the timer(s) if needed.
423 */
424 if (dqp->q_id) {
425 xfs_qm_adjust_dqlimits(dqp);
426 xfs_qm_adjust_dqtimers(dqp);
427 }
428
429 dqp->q_flags |= XFS_DQFLAG_DIRTY;
430 /*
431 * add this to the list of items to get logged
432 */
433 xfs_trans_log_dquot(tp, dqp);
434 /*
435 * Take off what's left of the original reservation.
436 * In case of delayed allocations, there's no
437 * reservation that a transaction structure knows of.
438 */
439 blk_res_used = max_t(int64_t, 0, qtrx->qt_bcount_delta);
440 xfs_apply_quota_reservation_deltas(&dqp->q_blk,
441 qtrx->qt_blk_res, blk_res_used,
442 qtrx->qt_bcount_delta);
443
444 /*
445 * Adjust the RT reservation.
446 */
447 xfs_apply_quota_reservation_deltas(&dqp->q_rtb,
448 qtrx->qt_rtblk_res,
449 qtrx->qt_rtblk_res_used,
450 qtrx->qt_rtbcount_delta);
451
452 /*
453 * Adjust the inode reservation.
454 */
455 ASSERT(qtrx->qt_ino_res >= qtrx->qt_ino_res_used);
456 xfs_apply_quota_reservation_deltas(&dqp->q_ino,
457 qtrx->qt_ino_res,
458 qtrx->qt_ino_res_used,
459 qtrx->qt_icount_delta);
460
461 ASSERT(dqp->q_blk.reserved >= dqp->q_blk.count);
462 ASSERT(dqp->q_ino.reserved >= dqp->q_ino.count);
463 ASSERT(dqp->q_rtb.reserved >= dqp->q_rtb.count);
464 }
465 }
466}
467
468/*
469 * Release the reservations, and adjust the dquots accordingly.
470 * This is called only when the transaction is being aborted. If by
471 * any chance we have done dquot modifications incore (ie. deltas) already,
472 * we simply throw those away, since that's the expected behavior
473 * when a transaction is curtailed without a commit.
474 */
475void
476xfs_trans_unreserve_and_mod_dquots(
477 struct xfs_trans *tp)
478{
479 int i, j;
480 struct xfs_dquot *dqp;
481 struct xfs_dqtrx *qtrx, *qa;
482 bool locked;
483
484 if (!tp->t_dqinfo)
485 return;
486
487 for (j = 0; j < XFS_QM_TRANS_DQTYPES; j++) {
488 qa = tp->t_dqinfo->dqs[j];
489
490 for (i = 0; i < XFS_QM_TRANS_MAXDQS; i++) {
491 qtrx = &qa[i];
492 /*
493 * We assume that the array of dquots is filled
494 * sequentially, not sparsely.
495 */
496 if ((dqp = qtrx->qt_dquot) == NULL)
497 break;
498 /*
499 * Unreserve the original reservation. We don't care
500 * about the number of blocks used field, or deltas.
501 * Also we don't bother to zero the fields.
502 */
503 locked = false;
504 if (qtrx->qt_blk_res) {
505 xfs_dqlock(dqp);
506 locked = true;
507 dqp->q_blk.reserved -=
508 (xfs_qcnt_t)qtrx->qt_blk_res;
509 }
510 if (qtrx->qt_ino_res) {
511 if (!locked) {
512 xfs_dqlock(dqp);
513 locked = true;
514 }
515 dqp->q_ino.reserved -=
516 (xfs_qcnt_t)qtrx->qt_ino_res;
517 }
518
519 if (qtrx->qt_rtblk_res) {
520 if (!locked) {
521 xfs_dqlock(dqp);
522 locked = true;
523 }
524 dqp->q_rtb.reserved -=
525 (xfs_qcnt_t)qtrx->qt_rtblk_res;
526 }
527 if (locked)
528 xfs_dqunlock(dqp);
529
530 }
531 }
532}
533
534STATIC void
535xfs_quota_warn(
536 struct xfs_mount *mp,
537 struct xfs_dquot *dqp,
538 int type)
539{
540 enum quota_type qtype;
541
542 switch (xfs_dquot_type(dqp)) {
543 case XFS_DQTYPE_PROJ:
544 qtype = PRJQUOTA;
545 break;
546 case XFS_DQTYPE_USER:
547 qtype = USRQUOTA;
548 break;
549 case XFS_DQTYPE_GROUP:
550 qtype = GRPQUOTA;
551 break;
552 default:
553 return;
554 }
555
556 quota_send_warning(make_kqid(&init_user_ns, qtype, dqp->q_id),
557 mp->m_super->s_dev, type);
558}
559
560/*
561 * Decide if we can make an additional reservation against a quota resource.
562 * Returns an inode QUOTA_NL_ warning code and whether or not it's fatal.
563 *
564 * Note that we assume that the numeric difference between the inode and block
565 * warning codes will always be 3 since it's userspace ABI now, and will never
566 * decrease the quota reservation, so the *BELOW messages are irrelevant.
567 */
568static inline int
569xfs_dqresv_check(
570 struct xfs_dquot_res *res,
571 struct xfs_quota_limits *qlim,
572 int64_t delta,
573 bool *fatal)
574{
575 xfs_qcnt_t hardlimit = res->hardlimit;
576 xfs_qcnt_t softlimit = res->softlimit;
577 xfs_qcnt_t total_count = res->reserved + delta;
578
579 BUILD_BUG_ON(QUOTA_NL_BHARDWARN != QUOTA_NL_IHARDWARN + 3);
580 BUILD_BUG_ON(QUOTA_NL_BSOFTLONGWARN != QUOTA_NL_ISOFTLONGWARN + 3);
581 BUILD_BUG_ON(QUOTA_NL_BSOFTWARN != QUOTA_NL_ISOFTWARN + 3);
582
583 *fatal = false;
584 if (delta <= 0)
585 return QUOTA_NL_NOWARN;
586
587 if (!hardlimit)
588 hardlimit = qlim->hard;
589 if (!softlimit)
590 softlimit = qlim->soft;
591
592 if (hardlimit && total_count > hardlimit) {
593 *fatal = true;
594 return QUOTA_NL_IHARDWARN;
595 }
596
597 if (softlimit && total_count > softlimit) {
598 time64_t now = ktime_get_real_seconds();
599
600 if (res->timer != 0 && now > res->timer) {
601 *fatal = true;
602 return QUOTA_NL_ISOFTLONGWARN;
603 }
604
605 return QUOTA_NL_ISOFTWARN;
606 }
607
608 return QUOTA_NL_NOWARN;
609}
610
611/*
612 * This reserves disk blocks and inodes against a dquot.
613 * Flags indicate if the dquot is to be locked here and also
614 * if the blk reservation is for RT or regular blocks.
615 * Sending in XFS_QMOPT_FORCE_RES flag skips the quota check.
616 */
617STATIC int
618xfs_trans_dqresv(
619 struct xfs_trans *tp,
620 struct xfs_mount *mp,
621 struct xfs_dquot *dqp,
622 int64_t nblks,
623 long ninos,
624 uint flags)
625{
626 struct xfs_quotainfo *q = mp->m_quotainfo;
627 struct xfs_def_quota *defq;
628 struct xfs_dquot_res *blkres;
629 struct xfs_quota_limits *qlim;
630
631 xfs_dqlock(dqp);
632
633 defq = xfs_get_defquota(q, xfs_dquot_type(dqp));
634
635 if (flags & XFS_TRANS_DQ_RES_BLKS) {
636 blkres = &dqp->q_blk;
637 qlim = &defq->blk;
638 } else {
639 blkres = &dqp->q_rtb;
640 qlim = &defq->rtb;
641 }
642
643 if ((flags & XFS_QMOPT_FORCE_RES) == 0 && dqp->q_id &&
644 xfs_dquot_is_enforced(dqp)) {
645 int quota_nl;
646 bool fatal;
647
648 /*
649 * dquot is locked already. See if we'd go over the hardlimit
650 * or exceed the timelimit if we'd reserve resources.
651 */
652 quota_nl = xfs_dqresv_check(blkres, qlim, nblks, &fatal);
653 if (quota_nl != QUOTA_NL_NOWARN) {
654 /*
655 * Quota block warning codes are 3 more than the inode
656 * codes, which we check above.
657 */
658 xfs_quota_warn(mp, dqp, quota_nl + 3);
659 if (fatal)
660 goto error_return;
661 }
662
663 quota_nl = xfs_dqresv_check(&dqp->q_ino, &defq->ino, ninos,
664 &fatal);
665 if (quota_nl != QUOTA_NL_NOWARN) {
666 xfs_quota_warn(mp, dqp, quota_nl);
667 if (fatal)
668 goto error_return;
669 }
670 }
671
672 /*
673 * Change the reservation, but not the actual usage.
674 * Note that q_blk.reserved = q_blk.count + resv
675 */
676 blkres->reserved += (xfs_qcnt_t)nblks;
677 dqp->q_ino.reserved += (xfs_qcnt_t)ninos;
678
679 /*
680 * note the reservation amt in the trans struct too,
681 * so that the transaction knows how much was reserved by
682 * it against this particular dquot.
683 * We don't do this when we are reserving for a delayed allocation,
684 * because we don't have the luxury of a transaction envelope then.
685 */
686 if (tp) {
687 ASSERT(flags & XFS_QMOPT_RESBLK_MASK);
688 xfs_trans_mod_dquot(tp, dqp, flags & XFS_QMOPT_RESBLK_MASK,
689 nblks);
690 xfs_trans_mod_dquot(tp, dqp, XFS_TRANS_DQ_RES_INOS, ninos);
691 }
692
693 if (XFS_IS_CORRUPT(mp, dqp->q_blk.reserved < dqp->q_blk.count) ||
694 XFS_IS_CORRUPT(mp, dqp->q_rtb.reserved < dqp->q_rtb.count) ||
695 XFS_IS_CORRUPT(mp, dqp->q_ino.reserved < dqp->q_ino.count))
696 goto error_corrupt;
697
698 xfs_dqunlock(dqp);
699 return 0;
700
701error_return:
702 xfs_dqunlock(dqp);
703 if (xfs_dquot_type(dqp) == XFS_DQTYPE_PROJ)
704 return -ENOSPC;
705 return -EDQUOT;
706error_corrupt:
707 xfs_dqunlock(dqp);
708 xfs_force_shutdown(mp, SHUTDOWN_CORRUPT_INCORE);
709 return -EFSCORRUPTED;
710}
711
712
713/*
714 * Given dquot(s), make disk block and/or inode reservations against them.
715 * The fact that this does the reservation against user, group and
716 * project quotas is important, because this follows a all-or-nothing
717 * approach.
718 *
719 * flags = XFS_QMOPT_FORCE_RES evades limit enforcement. Used by chown.
720 * XFS_QMOPT_ENOSPC returns ENOSPC not EDQUOT. Used by pquota.
721 * XFS_TRANS_DQ_RES_BLKS reserves regular disk blocks
722 * XFS_TRANS_DQ_RES_RTBLKS reserves realtime disk blocks
723 * dquots are unlocked on return, if they were not locked by caller.
724 */
725int
726xfs_trans_reserve_quota_bydquots(
727 struct xfs_trans *tp,
728 struct xfs_mount *mp,
729 struct xfs_dquot *udqp,
730 struct xfs_dquot *gdqp,
731 struct xfs_dquot *pdqp,
732 int64_t nblks,
733 long ninos,
734 uint flags)
735{
736 int error;
737
738 if (!XFS_IS_QUOTA_ON(mp))
739 return 0;
740
741 ASSERT(flags & XFS_QMOPT_RESBLK_MASK);
742
743 if (udqp) {
744 error = xfs_trans_dqresv(tp, mp, udqp, nblks, ninos, flags);
745 if (error)
746 return error;
747 }
748
749 if (gdqp) {
750 error = xfs_trans_dqresv(tp, mp, gdqp, nblks, ninos, flags);
751 if (error)
752 goto unwind_usr;
753 }
754
755 if (pdqp) {
756 error = xfs_trans_dqresv(tp, mp, pdqp, nblks, ninos, flags);
757 if (error)
758 goto unwind_grp;
759 }
760
761 /*
762 * Didn't change anything critical, so, no need to log
763 */
764 return 0;
765
766unwind_grp:
767 flags |= XFS_QMOPT_FORCE_RES;
768 if (gdqp)
769 xfs_trans_dqresv(tp, mp, gdqp, -nblks, -ninos, flags);
770unwind_usr:
771 flags |= XFS_QMOPT_FORCE_RES;
772 if (udqp)
773 xfs_trans_dqresv(tp, mp, udqp, -nblks, -ninos, flags);
774 return error;
775}
776
777
778/*
779 * Lock the dquot and change the reservation if we can.
780 * This doesn't change the actual usage, just the reservation.
781 * The inode sent in is locked.
782 */
783int
784xfs_trans_reserve_quota_nblks(
785 struct xfs_trans *tp,
786 struct xfs_inode *ip,
787 int64_t dblocks,
788 int64_t rblocks,
789 bool force)
790{
791 struct xfs_mount *mp = ip->i_mount;
792 unsigned int qflags = 0;
793 int error;
794
795 if (!XFS_IS_QUOTA_ON(mp))
796 return 0;
797
798 ASSERT(!xfs_is_quota_inode(&mp->m_sb, ip->i_ino));
799 ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL));
800
801 if (force)
802 qflags |= XFS_QMOPT_FORCE_RES;
803
804 /* Reserve data device quota against the inode's dquots. */
805 error = xfs_trans_reserve_quota_bydquots(tp, mp, ip->i_udquot,
806 ip->i_gdquot, ip->i_pdquot, dblocks, 0,
807 XFS_QMOPT_RES_REGBLKS | qflags);
808 if (error)
809 return error;
810
811 /* Do the same but for realtime blocks. */
812 error = xfs_trans_reserve_quota_bydquots(tp, mp, ip->i_udquot,
813 ip->i_gdquot, ip->i_pdquot, rblocks, 0,
814 XFS_QMOPT_RES_RTBLKS | qflags);
815 if (error) {
816 xfs_trans_reserve_quota_bydquots(tp, mp, ip->i_udquot,
817 ip->i_gdquot, ip->i_pdquot, -dblocks, 0,
818 XFS_QMOPT_RES_REGBLKS);
819 return error;
820 }
821
822 return 0;
823}
824
825/* Change the quota reservations for an inode creation activity. */
826int
827xfs_trans_reserve_quota_icreate(
828 struct xfs_trans *tp,
829 struct xfs_dquot *udqp,
830 struct xfs_dquot *gdqp,
831 struct xfs_dquot *pdqp,
832 int64_t dblocks)
833{
834 struct xfs_mount *mp = tp->t_mountp;
835
836 if (!XFS_IS_QUOTA_ON(mp))
837 return 0;
838
839 return xfs_trans_reserve_quota_bydquots(tp, mp, udqp, gdqp, pdqp,
840 dblocks, 1, XFS_QMOPT_RES_REGBLKS);
841}
842
843STATIC void
844xfs_trans_alloc_dqinfo(
845 xfs_trans_t *tp)
846{
847 tp->t_dqinfo = kmem_cache_zalloc(xfs_dqtrx_cache,
848 GFP_KERNEL | __GFP_NOFAIL);
849}
850
851void
852xfs_trans_free_dqinfo(
853 xfs_trans_t *tp)
854{
855 if (!tp->t_dqinfo)
856 return;
857 kmem_cache_free(xfs_dqtrx_cache, tp->t_dqinfo);
858 tp->t_dqinfo = NULL;
859}