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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#include "xfs_health.h"
21
22STATIC void xfs_trans_alloc_dqinfo(xfs_trans_t *);
23
24/*
25 * Add the locked dquot to the transaction.
26 * The dquot must be locked, and it cannot be associated with any
27 * transaction.
28 */
29void
30xfs_trans_dqjoin(
31 struct xfs_trans *tp,
32 struct xfs_dquot *dqp)
33{
34 ASSERT(XFS_DQ_IS_LOCKED(dqp));
35 ASSERT(dqp->q_logitem.qli_dquot == dqp);
36
37 /*
38 * Get a log_item_desc to point at the new item.
39 */
40 xfs_trans_add_item(tp, &dqp->q_logitem.qli_item);
41}
42
43/*
44 * This is called to mark the dquot as needing
45 * to be logged when the transaction is committed. The dquot must
46 * already be associated with the given transaction.
47 * Note that it marks the entire transaction as dirty. In the ordinary
48 * case, this gets called via xfs_trans_commit, after the transaction
49 * is already dirty. However, there's nothing stop this from getting
50 * called directly, as done by xfs_qm_scall_setqlim. Hence, the TRANS_DIRTY
51 * flag.
52 */
53void
54xfs_trans_log_dquot(
55 struct xfs_trans *tp,
56 struct xfs_dquot *dqp)
57{
58 ASSERT(XFS_DQ_IS_LOCKED(dqp));
59
60 /* Upgrade the dquot to bigtime format if possible. */
61 if (dqp->q_id != 0 &&
62 xfs_has_bigtime(tp->t_mountp) &&
63 !(dqp->q_type & XFS_DQTYPE_BIGTIME))
64 dqp->q_type |= XFS_DQTYPE_BIGTIME;
65
66 tp->t_flags |= XFS_TRANS_DIRTY;
67 set_bit(XFS_LI_DIRTY, &dqp->q_logitem.qli_item.li_flags);
68}
69
70/*
71 * Carry forward whatever is left of the quota blk reservation to
72 * the spanky new transaction
73 */
74void
75xfs_trans_dup_dqinfo(
76 struct xfs_trans *otp,
77 struct xfs_trans *ntp)
78{
79 struct xfs_dqtrx *oq, *nq;
80 int i, j;
81 struct xfs_dqtrx *oqa, *nqa;
82 uint64_t blk_res_used;
83
84 if (!otp->t_dqinfo)
85 return;
86
87 xfs_trans_alloc_dqinfo(ntp);
88
89 for (j = 0; j < XFS_QM_TRANS_DQTYPES; j++) {
90 oqa = otp->t_dqinfo->dqs[j];
91 nqa = ntp->t_dqinfo->dqs[j];
92 for (i = 0; i < XFS_QM_TRANS_MAXDQS; i++) {
93 blk_res_used = 0;
94
95 if (oqa[i].qt_dquot == NULL)
96 break;
97 oq = &oqa[i];
98 nq = &nqa[i];
99
100 if (oq->qt_blk_res && oq->qt_bcount_delta > 0)
101 blk_res_used = oq->qt_bcount_delta;
102
103 nq->qt_dquot = oq->qt_dquot;
104 nq->qt_bcount_delta = nq->qt_icount_delta = 0;
105 nq->qt_rtbcount_delta = 0;
106
107 /*
108 * Transfer whatever is left of the reservations.
109 */
110 nq->qt_blk_res = oq->qt_blk_res - blk_res_used;
111 oq->qt_blk_res = blk_res_used;
112
113 nq->qt_rtblk_res = oq->qt_rtblk_res -
114 oq->qt_rtblk_res_used;
115 oq->qt_rtblk_res = oq->qt_rtblk_res_used;
116
117 nq->qt_ino_res = oq->qt_ino_res - oq->qt_ino_res_used;
118 oq->qt_ino_res = oq->qt_ino_res_used;
119
120 }
121 }
122}
123
124#ifdef CONFIG_XFS_LIVE_HOOKS
125/*
126 * Use a static key here to reduce the overhead of quota live updates. If the
127 * compiler supports jump labels, the static branch will be replaced by a nop
128 * sled when there are no hook users. Online fsck is currently the only
129 * caller, so this is a reasonable tradeoff.
130 *
131 * Note: Patching the kernel code requires taking the cpu hotplug lock. Other
132 * parts of the kernel allocate memory with that lock held, which means that
133 * XFS callers cannot hold any locks that might be used by memory reclaim or
134 * writeback when calling the static_branch_{inc,dec} functions.
135 */
136DEFINE_STATIC_XFS_HOOK_SWITCH(xfs_dqtrx_hooks_switch);
137
138void
139xfs_dqtrx_hook_disable(void)
140{
141 xfs_hooks_switch_off(&xfs_dqtrx_hooks_switch);
142}
143
144void
145xfs_dqtrx_hook_enable(void)
146{
147 xfs_hooks_switch_on(&xfs_dqtrx_hooks_switch);
148}
149
150/* Schedule a transactional dquot update on behalf of an inode. */
151void
152xfs_trans_mod_ino_dquot(
153 struct xfs_trans *tp,
154 struct xfs_inode *ip,
155 struct xfs_dquot *dqp,
156 unsigned int field,
157 int64_t delta)
158{
159 xfs_trans_mod_dquot(tp, dqp, field, delta);
160
161 if (xfs_hooks_switched_on(&xfs_dqtrx_hooks_switch)) {
162 struct xfs_mod_ino_dqtrx_params p = {
163 .tx_id = (uintptr_t)tp,
164 .ino = ip->i_ino,
165 .q_type = xfs_dquot_type(dqp),
166 .q_id = dqp->q_id,
167 .delta = delta
168 };
169 struct xfs_quotainfo *qi = tp->t_mountp->m_quotainfo;
170
171 xfs_hooks_call(&qi->qi_mod_ino_dqtrx_hooks, field, &p);
172 }
173}
174
175/* Call the specified functions during a dquot counter update. */
176int
177xfs_dqtrx_hook_add(
178 struct xfs_quotainfo *qi,
179 struct xfs_dqtrx_hook *hook)
180{
181 int error;
182
183 /*
184 * Transactional dquot updates first call the mod hook when changes
185 * are attached to the transaction and then call the apply hook when
186 * those changes are committed (or canceled).
187 *
188 * The apply hook must be installed before the mod hook so that we
189 * never fail to catch the end of a quota update sequence.
190 */
191 error = xfs_hooks_add(&qi->qi_apply_dqtrx_hooks, &hook->apply_hook);
192 if (error)
193 goto out;
194
195 error = xfs_hooks_add(&qi->qi_mod_ino_dqtrx_hooks, &hook->mod_hook);
196 if (error)
197 goto out_apply;
198
199 return 0;
200
201out_apply:
202 xfs_hooks_del(&qi->qi_apply_dqtrx_hooks, &hook->apply_hook);
203out:
204 return error;
205}
206
207/* Stop calling the specified function during a dquot counter update. */
208void
209xfs_dqtrx_hook_del(
210 struct xfs_quotainfo *qi,
211 struct xfs_dqtrx_hook *hook)
212{
213 /*
214 * The mod hook must be removed before apply hook to avoid giving the
215 * hook consumer with an incomplete update. No hooks should be running
216 * after these functions return.
217 */
218 xfs_hooks_del(&qi->qi_mod_ino_dqtrx_hooks, &hook->mod_hook);
219 xfs_hooks_del(&qi->qi_apply_dqtrx_hooks, &hook->apply_hook);
220}
221
222/* Configure dquot update hook functions. */
223void
224xfs_dqtrx_hook_setup(
225 struct xfs_dqtrx_hook *hook,
226 notifier_fn_t mod_fn,
227 notifier_fn_t apply_fn)
228{
229 xfs_hook_setup(&hook->mod_hook, mod_fn);
230 xfs_hook_setup(&hook->apply_hook, apply_fn);
231}
232#endif /* CONFIG_XFS_LIVE_HOOKS */
233
234/*
235 * Wrap around mod_dquot to account for both user and group quotas.
236 */
237void
238xfs_trans_mod_dquot_byino(
239 xfs_trans_t *tp,
240 xfs_inode_t *ip,
241 uint field,
242 int64_t delta)
243{
244 xfs_mount_t *mp = tp->t_mountp;
245
246 if (!XFS_IS_QUOTA_ON(mp) ||
247 xfs_is_quota_inode(&mp->m_sb, ip->i_ino))
248 return;
249
250 if (XFS_IS_UQUOTA_ON(mp) && ip->i_udquot)
251 xfs_trans_mod_ino_dquot(tp, ip, ip->i_udquot, field, delta);
252 if (XFS_IS_GQUOTA_ON(mp) && ip->i_gdquot)
253 xfs_trans_mod_ino_dquot(tp, ip, ip->i_gdquot, field, delta);
254 if (XFS_IS_PQUOTA_ON(mp) && ip->i_pdquot)
255 xfs_trans_mod_ino_dquot(tp, ip, ip->i_pdquot, field, delta);
256}
257
258STATIC struct xfs_dqtrx *
259xfs_trans_get_dqtrx(
260 struct xfs_trans *tp,
261 struct xfs_dquot *dqp)
262{
263 int i;
264 struct xfs_dqtrx *qa;
265
266 switch (xfs_dquot_type(dqp)) {
267 case XFS_DQTYPE_USER:
268 qa = tp->t_dqinfo->dqs[XFS_QM_TRANS_USR];
269 break;
270 case XFS_DQTYPE_GROUP:
271 qa = tp->t_dqinfo->dqs[XFS_QM_TRANS_GRP];
272 break;
273 case XFS_DQTYPE_PROJ:
274 qa = tp->t_dqinfo->dqs[XFS_QM_TRANS_PRJ];
275 break;
276 default:
277 return NULL;
278 }
279
280 for (i = 0; i < XFS_QM_TRANS_MAXDQS; i++) {
281 if (qa[i].qt_dquot == NULL ||
282 qa[i].qt_dquot == dqp)
283 return &qa[i];
284 }
285
286 return NULL;
287}
288
289/*
290 * Make the changes in the transaction structure.
291 * The moral equivalent to xfs_trans_mod_sb().
292 * We don't touch any fields in the dquot, so we don't care
293 * if it's locked or not (most of the time it won't be).
294 */
295void
296xfs_trans_mod_dquot(
297 struct xfs_trans *tp,
298 struct xfs_dquot *dqp,
299 uint field,
300 int64_t delta)
301{
302 struct xfs_dqtrx *qtrx;
303
304 ASSERT(tp);
305 ASSERT(XFS_IS_QUOTA_ON(tp->t_mountp));
306 qtrx = NULL;
307
308 if (!delta)
309 return;
310
311 if (tp->t_dqinfo == NULL)
312 xfs_trans_alloc_dqinfo(tp);
313 /*
314 * Find either the first free slot or the slot that belongs
315 * to this dquot.
316 */
317 qtrx = xfs_trans_get_dqtrx(tp, dqp);
318 ASSERT(qtrx);
319 if (qtrx->qt_dquot == NULL)
320 qtrx->qt_dquot = dqp;
321
322 trace_xfs_trans_mod_dquot_before(qtrx);
323 trace_xfs_trans_mod_dquot(tp, dqp, field, delta);
324
325 switch (field) {
326 /* regular disk blk reservation */
327 case XFS_TRANS_DQ_RES_BLKS:
328 qtrx->qt_blk_res += delta;
329 break;
330
331 /* inode reservation */
332 case XFS_TRANS_DQ_RES_INOS:
333 qtrx->qt_ino_res += delta;
334 break;
335
336 /* disk blocks used. */
337 case XFS_TRANS_DQ_BCOUNT:
338 qtrx->qt_bcount_delta += delta;
339 break;
340
341 case XFS_TRANS_DQ_DELBCOUNT:
342 qtrx->qt_delbcnt_delta += delta;
343 break;
344
345 /* Inode Count */
346 case XFS_TRANS_DQ_ICOUNT:
347 if (qtrx->qt_ino_res && delta > 0) {
348 qtrx->qt_ino_res_used += delta;
349 ASSERT(qtrx->qt_ino_res >= qtrx->qt_ino_res_used);
350 }
351 qtrx->qt_icount_delta += delta;
352 break;
353
354 /* rtblk reservation */
355 case XFS_TRANS_DQ_RES_RTBLKS:
356 qtrx->qt_rtblk_res += delta;
357 break;
358
359 /* rtblk count */
360 case XFS_TRANS_DQ_RTBCOUNT:
361 if (qtrx->qt_rtblk_res && delta > 0) {
362 qtrx->qt_rtblk_res_used += delta;
363 ASSERT(qtrx->qt_rtblk_res >= qtrx->qt_rtblk_res_used);
364 }
365 qtrx->qt_rtbcount_delta += delta;
366 break;
367
368 case XFS_TRANS_DQ_DELRTBCOUNT:
369 qtrx->qt_delrtb_delta += delta;
370 break;
371
372 default:
373 ASSERT(0);
374 }
375
376 trace_xfs_trans_mod_dquot_after(qtrx);
377}
378
379
380/*
381 * Given an array of dqtrx structures, lock all the dquots associated and join
382 * them to the transaction, provided they have been modified. We know that the
383 * highest number of dquots of one type - usr, grp and prj - involved in a
384 * transaction is 3 so we don't need to make this very generic.
385 */
386STATIC void
387xfs_trans_dqlockedjoin(
388 struct xfs_trans *tp,
389 struct xfs_dqtrx *q)
390{
391 ASSERT(q[0].qt_dquot != NULL);
392 if (q[1].qt_dquot == NULL) {
393 xfs_dqlock(q[0].qt_dquot);
394 xfs_trans_dqjoin(tp, q[0].qt_dquot);
395 } else {
396 ASSERT(XFS_QM_TRANS_MAXDQS == 2);
397 xfs_dqlock2(q[0].qt_dquot, q[1].qt_dquot);
398 xfs_trans_dqjoin(tp, q[0].qt_dquot);
399 xfs_trans_dqjoin(tp, q[1].qt_dquot);
400 }
401}
402
403/* Apply dqtrx changes to the quota reservation counters. */
404static inline void
405xfs_apply_quota_reservation_deltas(
406 struct xfs_dquot_res *res,
407 uint64_t reserved,
408 int64_t res_used,
409 int64_t count_delta)
410{
411 if (reserved != 0) {
412 /*
413 * Subtle math here: If reserved > res_used (the normal case),
414 * we're simply subtracting the unused transaction quota
415 * reservation from the dquot reservation.
416 *
417 * If, however, res_used > reserved, then we have allocated
418 * more quota blocks than were reserved for the transaction.
419 * We must add that excess to the dquot reservation since it
420 * tracks (usage + resv) and by definition we didn't reserve
421 * that excess.
422 */
423 res->reserved -= abs(reserved - res_used);
424 } else if (count_delta != 0) {
425 /*
426 * These blks were never reserved, either inside a transaction
427 * or outside one (in a delayed allocation). Also, this isn't
428 * always a negative number since we sometimes deliberately
429 * skip quota reservations.
430 */
431 res->reserved += count_delta;
432 }
433}
434
435#ifdef CONFIG_XFS_LIVE_HOOKS
436/* Call downstream hooks now that it's time to apply dquot deltas. */
437static inline void
438xfs_trans_apply_dquot_deltas_hook(
439 struct xfs_trans *tp,
440 struct xfs_dquot *dqp)
441{
442 if (xfs_hooks_switched_on(&xfs_dqtrx_hooks_switch)) {
443 struct xfs_apply_dqtrx_params p = {
444 .tx_id = (uintptr_t)tp,
445 .q_type = xfs_dquot_type(dqp),
446 .q_id = dqp->q_id,
447 };
448 struct xfs_quotainfo *qi = tp->t_mountp->m_quotainfo;
449
450 xfs_hooks_call(&qi->qi_apply_dqtrx_hooks,
451 XFS_APPLY_DQTRX_COMMIT, &p);
452 }
453}
454#else
455# define xfs_trans_apply_dquot_deltas_hook(tp, dqp) ((void)0)
456#endif /* CONFIG_XFS_LIVE_HOOKS */
457
458/*
459 * Called by xfs_trans_commit() and similar in spirit to
460 * xfs_trans_apply_sb_deltas().
461 * Go thru all the dquots belonging to this transaction and modify the
462 * INCORE dquot to reflect the actual usages.
463 * Unreserve just the reservations done by this transaction.
464 * dquot is still left locked at exit.
465 */
466void
467xfs_trans_apply_dquot_deltas(
468 struct xfs_trans *tp)
469{
470 int i, j;
471 struct xfs_dquot *dqp;
472 struct xfs_dqtrx *qtrx, *qa;
473 int64_t totalbdelta;
474 int64_t totalrtbdelta;
475
476 if (!tp->t_dqinfo)
477 return;
478
479 ASSERT(tp->t_dqinfo);
480 for (j = 0; j < XFS_QM_TRANS_DQTYPES; j++) {
481 qa = tp->t_dqinfo->dqs[j];
482 if (qa[0].qt_dquot == NULL)
483 continue;
484
485 /*
486 * Lock all of the dquots and join them to the transaction.
487 */
488 xfs_trans_dqlockedjoin(tp, qa);
489
490 for (i = 0; i < XFS_QM_TRANS_MAXDQS; i++) {
491 uint64_t blk_res_used;
492
493 qtrx = &qa[i];
494 /*
495 * The array of dquots is filled
496 * sequentially, not sparsely.
497 */
498 if ((dqp = qtrx->qt_dquot) == NULL)
499 break;
500
501 ASSERT(XFS_DQ_IS_LOCKED(dqp));
502
503 xfs_trans_apply_dquot_deltas_hook(tp, dqp);
504
505 /*
506 * adjust the actual number of blocks used
507 */
508
509 /*
510 * The issue here is - sometimes we don't make a blkquota
511 * reservation intentionally to be fair to users
512 * (when the amount is small). On the other hand,
513 * delayed allocs do make reservations, but that's
514 * outside of a transaction, so we have no
515 * idea how much was really reserved.
516 * So, here we've accumulated delayed allocation blks and
517 * non-delay blks. The assumption is that the
518 * delayed ones are always reserved (outside of a
519 * transaction), and the others may or may not have
520 * quota reservations.
521 */
522 totalbdelta = qtrx->qt_bcount_delta +
523 qtrx->qt_delbcnt_delta;
524 totalrtbdelta = qtrx->qt_rtbcount_delta +
525 qtrx->qt_delrtb_delta;
526
527 if (totalbdelta != 0 || totalrtbdelta != 0 ||
528 qtrx->qt_icount_delta != 0) {
529 trace_xfs_trans_apply_dquot_deltas_before(dqp);
530 trace_xfs_trans_apply_dquot_deltas(qtrx);
531 }
532
533#ifdef DEBUG
534 if (totalbdelta < 0)
535 ASSERT(dqp->q_blk.count >= -totalbdelta);
536
537 if (totalrtbdelta < 0)
538 ASSERT(dqp->q_rtb.count >= -totalrtbdelta);
539
540 if (qtrx->qt_icount_delta < 0)
541 ASSERT(dqp->q_ino.count >= -qtrx->qt_icount_delta);
542#endif
543 if (totalbdelta)
544 dqp->q_blk.count += totalbdelta;
545
546 if (qtrx->qt_icount_delta)
547 dqp->q_ino.count += qtrx->qt_icount_delta;
548
549 if (totalrtbdelta)
550 dqp->q_rtb.count += totalrtbdelta;
551
552 if (totalbdelta != 0 || totalrtbdelta != 0 ||
553 qtrx->qt_icount_delta != 0)
554 trace_xfs_trans_apply_dquot_deltas_after(dqp);
555
556 /*
557 * Get any default limits in use.
558 * Start/reset the timer(s) if needed.
559 */
560 if (dqp->q_id) {
561 xfs_qm_adjust_dqlimits(dqp);
562 xfs_qm_adjust_dqtimers(dqp);
563 }
564
565 dqp->q_flags |= XFS_DQFLAG_DIRTY;
566 /*
567 * add this to the list of items to get logged
568 */
569 xfs_trans_log_dquot(tp, dqp);
570 /*
571 * Take off what's left of the original reservation.
572 * In case of delayed allocations, there's no
573 * reservation that a transaction structure knows of.
574 */
575 blk_res_used = max_t(int64_t, 0, qtrx->qt_bcount_delta);
576 xfs_apply_quota_reservation_deltas(&dqp->q_blk,
577 qtrx->qt_blk_res, blk_res_used,
578 qtrx->qt_bcount_delta);
579
580 /*
581 * Adjust the RT reservation.
582 */
583 xfs_apply_quota_reservation_deltas(&dqp->q_rtb,
584 qtrx->qt_rtblk_res,
585 qtrx->qt_rtblk_res_used,
586 qtrx->qt_rtbcount_delta);
587
588 /*
589 * Adjust the inode reservation.
590 */
591 ASSERT(qtrx->qt_ino_res >= qtrx->qt_ino_res_used);
592 xfs_apply_quota_reservation_deltas(&dqp->q_ino,
593 qtrx->qt_ino_res,
594 qtrx->qt_ino_res_used,
595 qtrx->qt_icount_delta);
596
597 ASSERT(dqp->q_blk.reserved >= dqp->q_blk.count);
598 ASSERT(dqp->q_ino.reserved >= dqp->q_ino.count);
599 ASSERT(dqp->q_rtb.reserved >= dqp->q_rtb.count);
600 }
601 }
602}
603
604#ifdef CONFIG_XFS_LIVE_HOOKS
605/* Call downstream hooks now that it's time to cancel dquot deltas. */
606static inline void
607xfs_trans_unreserve_and_mod_dquots_hook(
608 struct xfs_trans *tp,
609 struct xfs_dquot *dqp)
610{
611 if (xfs_hooks_switched_on(&xfs_dqtrx_hooks_switch)) {
612 struct xfs_apply_dqtrx_params p = {
613 .tx_id = (uintptr_t)tp,
614 .q_type = xfs_dquot_type(dqp),
615 .q_id = dqp->q_id,
616 };
617 struct xfs_quotainfo *qi = tp->t_mountp->m_quotainfo;
618
619 xfs_hooks_call(&qi->qi_apply_dqtrx_hooks,
620 XFS_APPLY_DQTRX_UNRESERVE, &p);
621 }
622}
623#else
624# define xfs_trans_unreserve_and_mod_dquots_hook(tp, dqp) ((void)0)
625#endif /* CONFIG_XFS_LIVE_HOOKS */
626
627/*
628 * Release the reservations, and adjust the dquots accordingly.
629 * This is called only when the transaction is being aborted. If by
630 * any chance we have done dquot modifications incore (ie. deltas) already,
631 * we simply throw those away, since that's the expected behavior
632 * when a transaction is curtailed without a commit.
633 */
634void
635xfs_trans_unreserve_and_mod_dquots(
636 struct xfs_trans *tp)
637{
638 int i, j;
639 struct xfs_dquot *dqp;
640 struct xfs_dqtrx *qtrx, *qa;
641 bool locked;
642
643 if (!tp->t_dqinfo)
644 return;
645
646 for (j = 0; j < XFS_QM_TRANS_DQTYPES; j++) {
647 qa = tp->t_dqinfo->dqs[j];
648
649 for (i = 0; i < XFS_QM_TRANS_MAXDQS; i++) {
650 qtrx = &qa[i];
651 /*
652 * We assume that the array of dquots is filled
653 * sequentially, not sparsely.
654 */
655 if ((dqp = qtrx->qt_dquot) == NULL)
656 break;
657
658 xfs_trans_unreserve_and_mod_dquots_hook(tp, dqp);
659
660 /*
661 * Unreserve the original reservation. We don't care
662 * about the number of blocks used field, or deltas.
663 * Also we don't bother to zero the fields.
664 */
665 locked = false;
666 if (qtrx->qt_blk_res) {
667 xfs_dqlock(dqp);
668 locked = true;
669 dqp->q_blk.reserved -=
670 (xfs_qcnt_t)qtrx->qt_blk_res;
671 }
672 if (qtrx->qt_ino_res) {
673 if (!locked) {
674 xfs_dqlock(dqp);
675 locked = true;
676 }
677 dqp->q_ino.reserved -=
678 (xfs_qcnt_t)qtrx->qt_ino_res;
679 }
680
681 if (qtrx->qt_rtblk_res) {
682 if (!locked) {
683 xfs_dqlock(dqp);
684 locked = true;
685 }
686 dqp->q_rtb.reserved -=
687 (xfs_qcnt_t)qtrx->qt_rtblk_res;
688 }
689 if (locked)
690 xfs_dqunlock(dqp);
691
692 }
693 }
694}
695
696STATIC void
697xfs_quota_warn(
698 struct xfs_mount *mp,
699 struct xfs_dquot *dqp,
700 int type)
701{
702 enum quota_type qtype;
703
704 switch (xfs_dquot_type(dqp)) {
705 case XFS_DQTYPE_PROJ:
706 qtype = PRJQUOTA;
707 break;
708 case XFS_DQTYPE_USER:
709 qtype = USRQUOTA;
710 break;
711 case XFS_DQTYPE_GROUP:
712 qtype = GRPQUOTA;
713 break;
714 default:
715 return;
716 }
717
718 quota_send_warning(make_kqid(&init_user_ns, qtype, dqp->q_id),
719 mp->m_super->s_dev, type);
720}
721
722/*
723 * Decide if we can make an additional reservation against a quota resource.
724 * Returns an inode QUOTA_NL_ warning code and whether or not it's fatal.
725 *
726 * Note that we assume that the numeric difference between the inode and block
727 * warning codes will always be 3 since it's userspace ABI now, and will never
728 * decrease the quota reservation, so the *BELOW messages are irrelevant.
729 */
730static inline int
731xfs_dqresv_check(
732 struct xfs_dquot_res *res,
733 struct xfs_quota_limits *qlim,
734 int64_t delta,
735 bool *fatal)
736{
737 xfs_qcnt_t hardlimit = res->hardlimit;
738 xfs_qcnt_t softlimit = res->softlimit;
739 xfs_qcnt_t total_count = res->reserved + delta;
740
741 BUILD_BUG_ON(QUOTA_NL_BHARDWARN != QUOTA_NL_IHARDWARN + 3);
742 BUILD_BUG_ON(QUOTA_NL_BSOFTLONGWARN != QUOTA_NL_ISOFTLONGWARN + 3);
743 BUILD_BUG_ON(QUOTA_NL_BSOFTWARN != QUOTA_NL_ISOFTWARN + 3);
744
745 *fatal = false;
746 if (delta <= 0)
747 return QUOTA_NL_NOWARN;
748
749 if (!hardlimit)
750 hardlimit = qlim->hard;
751 if (!softlimit)
752 softlimit = qlim->soft;
753
754 if (hardlimit && total_count > hardlimit) {
755 *fatal = true;
756 return QUOTA_NL_IHARDWARN;
757 }
758
759 if (softlimit && total_count > softlimit) {
760 time64_t now = ktime_get_real_seconds();
761
762 if (res->timer != 0 && now > res->timer) {
763 *fatal = true;
764 return QUOTA_NL_ISOFTLONGWARN;
765 }
766
767 return QUOTA_NL_ISOFTWARN;
768 }
769
770 return QUOTA_NL_NOWARN;
771}
772
773/*
774 * This reserves disk blocks and inodes against a dquot.
775 * Flags indicate if the dquot is to be locked here and also
776 * if the blk reservation is for RT or regular blocks.
777 * Sending in XFS_QMOPT_FORCE_RES flag skips the quota check.
778 */
779STATIC int
780xfs_trans_dqresv(
781 struct xfs_trans *tp,
782 struct xfs_mount *mp,
783 struct xfs_dquot *dqp,
784 int64_t nblks,
785 long ninos,
786 uint flags)
787{
788 struct xfs_quotainfo *q = mp->m_quotainfo;
789 struct xfs_def_quota *defq;
790 struct xfs_dquot_res *blkres;
791 struct xfs_quota_limits *qlim;
792
793 xfs_dqlock(dqp);
794
795 defq = xfs_get_defquota(q, xfs_dquot_type(dqp));
796
797 if (flags & XFS_TRANS_DQ_RES_BLKS) {
798 blkres = &dqp->q_blk;
799 qlim = &defq->blk;
800 } else {
801 blkres = &dqp->q_rtb;
802 qlim = &defq->rtb;
803 }
804
805 if ((flags & XFS_QMOPT_FORCE_RES) == 0 && dqp->q_id &&
806 xfs_dquot_is_enforced(dqp)) {
807 int quota_nl;
808 bool fatal;
809
810 /*
811 * dquot is locked already. See if we'd go over the hardlimit
812 * or exceed the timelimit if we'd reserve resources.
813 */
814 quota_nl = xfs_dqresv_check(blkres, qlim, nblks, &fatal);
815 if (quota_nl != QUOTA_NL_NOWARN) {
816 /*
817 * Quota block warning codes are 3 more than the inode
818 * codes, which we check above.
819 */
820 xfs_quota_warn(mp, dqp, quota_nl + 3);
821 if (fatal)
822 goto error_return;
823 }
824
825 quota_nl = xfs_dqresv_check(&dqp->q_ino, &defq->ino, ninos,
826 &fatal);
827 if (quota_nl != QUOTA_NL_NOWARN) {
828 xfs_quota_warn(mp, dqp, quota_nl);
829 if (fatal)
830 goto error_return;
831 }
832 }
833
834 /*
835 * Change the reservation, but not the actual usage.
836 * Note that q_blk.reserved = q_blk.count + resv
837 */
838 blkres->reserved += (xfs_qcnt_t)nblks;
839 dqp->q_ino.reserved += (xfs_qcnt_t)ninos;
840
841 /*
842 * note the reservation amt in the trans struct too,
843 * so that the transaction knows how much was reserved by
844 * it against this particular dquot.
845 * We don't do this when we are reserving for a delayed allocation,
846 * because we don't have the luxury of a transaction envelope then.
847 */
848 if (tp) {
849 ASSERT(flags & XFS_QMOPT_RESBLK_MASK);
850 xfs_trans_mod_dquot(tp, dqp, flags & XFS_QMOPT_RESBLK_MASK,
851 nblks);
852 xfs_trans_mod_dquot(tp, dqp, XFS_TRANS_DQ_RES_INOS, ninos);
853 }
854
855 if (XFS_IS_CORRUPT(mp, dqp->q_blk.reserved < dqp->q_blk.count) ||
856 XFS_IS_CORRUPT(mp, dqp->q_rtb.reserved < dqp->q_rtb.count) ||
857 XFS_IS_CORRUPT(mp, dqp->q_ino.reserved < dqp->q_ino.count))
858 goto error_corrupt;
859
860 xfs_dqunlock(dqp);
861 return 0;
862
863error_return:
864 xfs_dqunlock(dqp);
865 if (xfs_dquot_type(dqp) == XFS_DQTYPE_PROJ)
866 return -ENOSPC;
867 return -EDQUOT;
868error_corrupt:
869 xfs_dqunlock(dqp);
870 xfs_force_shutdown(mp, SHUTDOWN_CORRUPT_INCORE);
871 xfs_fs_mark_sick(mp, XFS_SICK_FS_QUOTACHECK);
872 return -EFSCORRUPTED;
873}
874
875
876/*
877 * Given dquot(s), make disk block and/or inode reservations against them.
878 * The fact that this does the reservation against user, group and
879 * project quotas is important, because this follows a all-or-nothing
880 * approach.
881 *
882 * flags = XFS_QMOPT_FORCE_RES evades limit enforcement. Used by chown.
883 * XFS_QMOPT_ENOSPC returns ENOSPC not EDQUOT. Used by pquota.
884 * XFS_TRANS_DQ_RES_BLKS reserves regular disk blocks
885 * XFS_TRANS_DQ_RES_RTBLKS reserves realtime disk blocks
886 * dquots are unlocked on return, if they were not locked by caller.
887 */
888int
889xfs_trans_reserve_quota_bydquots(
890 struct xfs_trans *tp,
891 struct xfs_mount *mp,
892 struct xfs_dquot *udqp,
893 struct xfs_dquot *gdqp,
894 struct xfs_dquot *pdqp,
895 int64_t nblks,
896 long ninos,
897 uint flags)
898{
899 int error;
900
901 if (!XFS_IS_QUOTA_ON(mp))
902 return 0;
903
904 ASSERT(flags & XFS_QMOPT_RESBLK_MASK);
905
906 if (udqp) {
907 error = xfs_trans_dqresv(tp, mp, udqp, nblks, ninos, flags);
908 if (error)
909 return error;
910 }
911
912 if (gdqp) {
913 error = xfs_trans_dqresv(tp, mp, gdqp, nblks, ninos, flags);
914 if (error)
915 goto unwind_usr;
916 }
917
918 if (pdqp) {
919 error = xfs_trans_dqresv(tp, mp, pdqp, nblks, ninos, flags);
920 if (error)
921 goto unwind_grp;
922 }
923
924 /*
925 * Didn't change anything critical, so, no need to log
926 */
927 return 0;
928
929unwind_grp:
930 flags |= XFS_QMOPT_FORCE_RES;
931 if (gdqp)
932 xfs_trans_dqresv(tp, mp, gdqp, -nblks, -ninos, flags);
933unwind_usr:
934 flags |= XFS_QMOPT_FORCE_RES;
935 if (udqp)
936 xfs_trans_dqresv(tp, mp, udqp, -nblks, -ninos, flags);
937 return error;
938}
939
940
941/*
942 * Lock the dquot and change the reservation if we can.
943 * This doesn't change the actual usage, just the reservation.
944 * The inode sent in is locked.
945 */
946int
947xfs_trans_reserve_quota_nblks(
948 struct xfs_trans *tp,
949 struct xfs_inode *ip,
950 int64_t dblocks,
951 int64_t rblocks,
952 bool force)
953{
954 struct xfs_mount *mp = ip->i_mount;
955 unsigned int qflags = 0;
956 int error;
957
958 if (!XFS_IS_QUOTA_ON(mp))
959 return 0;
960
961 ASSERT(!xfs_is_quota_inode(&mp->m_sb, ip->i_ino));
962 xfs_assert_ilocked(ip, XFS_ILOCK_EXCL);
963
964 if (force)
965 qflags |= XFS_QMOPT_FORCE_RES;
966
967 /* Reserve data device quota against the inode's dquots. */
968 error = xfs_trans_reserve_quota_bydquots(tp, mp, ip->i_udquot,
969 ip->i_gdquot, ip->i_pdquot, dblocks, 0,
970 XFS_QMOPT_RES_REGBLKS | qflags);
971 if (error)
972 return error;
973
974 /* Do the same but for realtime blocks. */
975 error = xfs_trans_reserve_quota_bydquots(tp, mp, ip->i_udquot,
976 ip->i_gdquot, ip->i_pdquot, rblocks, 0,
977 XFS_QMOPT_RES_RTBLKS | qflags);
978 if (error) {
979 xfs_trans_reserve_quota_bydquots(tp, mp, ip->i_udquot,
980 ip->i_gdquot, ip->i_pdquot, -dblocks, 0,
981 XFS_QMOPT_RES_REGBLKS);
982 return error;
983 }
984
985 return 0;
986}
987
988/* Change the quota reservations for an inode creation activity. */
989int
990xfs_trans_reserve_quota_icreate(
991 struct xfs_trans *tp,
992 struct xfs_dquot *udqp,
993 struct xfs_dquot *gdqp,
994 struct xfs_dquot *pdqp,
995 int64_t dblocks)
996{
997 struct xfs_mount *mp = tp->t_mountp;
998
999 if (!XFS_IS_QUOTA_ON(mp))
1000 return 0;
1001
1002 return xfs_trans_reserve_quota_bydquots(tp, mp, udqp, gdqp, pdqp,
1003 dblocks, 1, XFS_QMOPT_RES_REGBLKS);
1004}
1005
1006STATIC void
1007xfs_trans_alloc_dqinfo(
1008 xfs_trans_t *tp)
1009{
1010 tp->t_dqinfo = kmem_cache_zalloc(xfs_dqtrx_cache,
1011 GFP_KERNEL | __GFP_NOFAIL);
1012}
1013
1014void
1015xfs_trans_free_dqinfo(
1016 xfs_trans_t *tp)
1017{
1018 if (!tp->t_dqinfo)
1019 return;
1020 kmem_cache_free(xfs_dqtrx_cache, tp->t_dqinfo);
1021 tp->t_dqinfo = NULL;
1022}