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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/*
2 * Copyright (c) 2000-2002 Silicon Graphics, Inc.
3 * All Rights Reserved.
4 *
5 * This program is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU General Public License as
7 * published by the Free Software Foundation.
8 *
9 * This program is distributed in the hope that it would be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
13 *
14 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, write the Free Software Foundation,
16 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
17 */
18#include "xfs.h"
19#include "xfs_fs.h"
20#include "xfs_shared.h"
21#include "xfs_format.h"
22#include "xfs_log_format.h"
23#include "xfs_trans_resv.h"
24#include "xfs_mount.h"
25#include "xfs_inode.h"
26#include "xfs_error.h"
27#include "xfs_trans.h"
28#include "xfs_trans_priv.h"
29#include "xfs_quota.h"
30#include "xfs_qm.h"
31
32STATIC void xfs_trans_alloc_dqinfo(xfs_trans_t *);
33
34/*
35 * Add the locked dquot to the transaction.
36 * The dquot must be locked, and it cannot be associated with any
37 * transaction.
38 */
39void
40xfs_trans_dqjoin(
41 xfs_trans_t *tp,
42 xfs_dquot_t *dqp)
43{
44 ASSERT(dqp->q_transp != tp);
45 ASSERT(XFS_DQ_IS_LOCKED(dqp));
46 ASSERT(dqp->q_logitem.qli_dquot == dqp);
47
48 /*
49 * Get a log_item_desc to point at the new item.
50 */
51 xfs_trans_add_item(tp, &dqp->q_logitem.qli_item);
52
53 /*
54 * Initialize d_transp so we can later determine if this dquot is
55 * associated with this transaction.
56 */
57 dqp->q_transp = tp;
58}
59
60
61/*
62 * This is called to mark the dquot as needing
63 * to be logged when the transaction is committed. The dquot must
64 * already be associated with the given transaction.
65 * Note that it marks the entire transaction as dirty. In the ordinary
66 * case, this gets called via xfs_trans_commit, after the transaction
67 * is already dirty. However, there's nothing stop this from getting
68 * called directly, as done by xfs_qm_scall_setqlim. Hence, the TRANS_DIRTY
69 * flag.
70 */
71void
72xfs_trans_log_dquot(
73 xfs_trans_t *tp,
74 xfs_dquot_t *dqp)
75{
76 ASSERT(dqp->q_transp == tp);
77 ASSERT(XFS_DQ_IS_LOCKED(dqp));
78
79 tp->t_flags |= XFS_TRANS_DIRTY;
80 dqp->q_logitem.qli_item.li_desc->lid_flags |= XFS_LID_DIRTY;
81}
82
83/*
84 * Carry forward whatever is left of the quota blk reservation to
85 * the spanky new transaction
86 */
87void
88xfs_trans_dup_dqinfo(
89 xfs_trans_t *otp,
90 xfs_trans_t *ntp)
91{
92 xfs_dqtrx_t *oq, *nq;
93 int i, j;
94 xfs_dqtrx_t *oqa, *nqa;
95 ulong blk_res_used;
96
97 if (!otp->t_dqinfo)
98 return;
99
100 xfs_trans_alloc_dqinfo(ntp);
101
102 /*
103 * Because the quota blk reservation is carried forward,
104 * it is also necessary to carry forward the DQ_DIRTY flag.
105 */
106 if (otp->t_flags & XFS_TRANS_DQ_DIRTY)
107 ntp->t_flags |= XFS_TRANS_DQ_DIRTY;
108
109 for (j = 0; j < XFS_QM_TRANS_DQTYPES; j++) {
110 oqa = otp->t_dqinfo->dqs[j];
111 nqa = ntp->t_dqinfo->dqs[j];
112 for (i = 0; i < XFS_QM_TRANS_MAXDQS; i++) {
113 blk_res_used = 0;
114
115 if (oqa[i].qt_dquot == NULL)
116 break;
117 oq = &oqa[i];
118 nq = &nqa[i];
119
120 if (oq->qt_blk_res && oq->qt_bcount_delta > 0)
121 blk_res_used = oq->qt_bcount_delta;
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 - blk_res_used;
131 oq->qt_blk_res = 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 }
142}
143
144/*
145 * Wrap around mod_dquot to account for both user and group quotas.
146 */
147void
148xfs_trans_mod_dquot_byino(
149 xfs_trans_t *tp,
150 xfs_inode_t *ip,
151 uint field,
152 long delta)
153{
154 xfs_mount_t *mp = tp->t_mountp;
155
156 if (!XFS_IS_QUOTA_RUNNING(mp) ||
157 !XFS_IS_QUOTA_ON(mp) ||
158 xfs_is_quota_inode(&mp->m_sb, ip->i_ino))
159 return;
160
161 if (tp->t_dqinfo == NULL)
162 xfs_trans_alloc_dqinfo(tp);
163
164 if (XFS_IS_UQUOTA_ON(mp) && ip->i_udquot)
165 (void) xfs_trans_mod_dquot(tp, ip->i_udquot, field, delta);
166 if (XFS_IS_GQUOTA_ON(mp) && ip->i_gdquot)
167 (void) xfs_trans_mod_dquot(tp, ip->i_gdquot, field, delta);
168 if (XFS_IS_PQUOTA_ON(mp) && ip->i_pdquot)
169 (void) xfs_trans_mod_dquot(tp, ip->i_pdquot, field, delta);
170}
171
172STATIC struct xfs_dqtrx *
173xfs_trans_get_dqtrx(
174 struct xfs_trans *tp,
175 struct xfs_dquot *dqp)
176{
177 int i;
178 struct xfs_dqtrx *qa;
179
180 if (XFS_QM_ISUDQ(dqp))
181 qa = tp->t_dqinfo->dqs[XFS_QM_TRANS_USR];
182 else if (XFS_QM_ISGDQ(dqp))
183 qa = tp->t_dqinfo->dqs[XFS_QM_TRANS_GRP];
184 else if (XFS_QM_ISPDQ(dqp))
185 qa = tp->t_dqinfo->dqs[XFS_QM_TRANS_PRJ];
186 else
187 return NULL;
188
189 for (i = 0; i < XFS_QM_TRANS_MAXDQS; i++) {
190 if (qa[i].qt_dquot == NULL ||
191 qa[i].qt_dquot == dqp)
192 return &qa[i];
193 }
194
195 return NULL;
196}
197
198/*
199 * Make the changes in the transaction structure.
200 * The moral equivalent to xfs_trans_mod_sb().
201 * We don't touch any fields in the dquot, so we don't care
202 * if it's locked or not (most of the time it won't be).
203 */
204void
205xfs_trans_mod_dquot(
206 xfs_trans_t *tp,
207 xfs_dquot_t *dqp,
208 uint field,
209 long delta)
210{
211 xfs_dqtrx_t *qtrx;
212
213 ASSERT(tp);
214 ASSERT(XFS_IS_QUOTA_RUNNING(tp->t_mountp));
215 qtrx = NULL;
216
217 if (tp->t_dqinfo == NULL)
218 xfs_trans_alloc_dqinfo(tp);
219 /*
220 * Find either the first free slot or the slot that belongs
221 * to this dquot.
222 */
223 qtrx = xfs_trans_get_dqtrx(tp, dqp);
224 ASSERT(qtrx);
225 if (qtrx->qt_dquot == NULL)
226 qtrx->qt_dquot = dqp;
227
228 switch (field) {
229
230 /*
231 * regular disk blk reservation
232 */
233 case XFS_TRANS_DQ_RES_BLKS:
234 qtrx->qt_blk_res += (ulong)delta;
235 break;
236
237 /*
238 * inode reservation
239 */
240 case XFS_TRANS_DQ_RES_INOS:
241 qtrx->qt_ino_res += (ulong)delta;
242 break;
243
244 /*
245 * disk blocks used.
246 */
247 case XFS_TRANS_DQ_BCOUNT:
248 qtrx->qt_bcount_delta += delta;
249 break;
250
251 case XFS_TRANS_DQ_DELBCOUNT:
252 qtrx->qt_delbcnt_delta += delta;
253 break;
254
255 /*
256 * Inode Count
257 */
258 case XFS_TRANS_DQ_ICOUNT:
259 if (qtrx->qt_ino_res && delta > 0) {
260 qtrx->qt_ino_res_used += (ulong)delta;
261 ASSERT(qtrx->qt_ino_res >= qtrx->qt_ino_res_used);
262 }
263 qtrx->qt_icount_delta += delta;
264 break;
265
266 /*
267 * rtblk reservation
268 */
269 case XFS_TRANS_DQ_RES_RTBLKS:
270 qtrx->qt_rtblk_res += (ulong)delta;
271 break;
272
273 /*
274 * rtblk count
275 */
276 case XFS_TRANS_DQ_RTBCOUNT:
277 if (qtrx->qt_rtblk_res && delta > 0) {
278 qtrx->qt_rtblk_res_used += (ulong)delta;
279 ASSERT(qtrx->qt_rtblk_res >= qtrx->qt_rtblk_res_used);
280 }
281 qtrx->qt_rtbcount_delta += delta;
282 break;
283
284 case XFS_TRANS_DQ_DELRTBCOUNT:
285 qtrx->qt_delrtb_delta += delta;
286 break;
287
288 default:
289 ASSERT(0);
290 }
291 tp->t_flags |= XFS_TRANS_DQ_DIRTY;
292}
293
294
295/*
296 * Given an array of dqtrx structures, lock all the dquots associated and join
297 * them to the transaction, provided they have been modified. We know that the
298 * highest number of dquots of one type - usr, grp and prj - involved in a
299 * transaction is 3 so we don't need to make this very generic.
300 */
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 struct xfs_trans *tp)
330{
331 int i, j;
332 struct xfs_dquot *dqp;
333 struct xfs_dqtrx *qtrx, *qa;
334 struct xfs_disk_dquot *d;
335 long totalbdelta;
336 long totalrtbdelta;
337
338 if (!(tp->t_flags & XFS_TRANS_DQ_DIRTY))
339 return;
340
341 ASSERT(tp->t_dqinfo);
342 for (j = 0; j < XFS_QM_TRANS_DQTYPES; j++) {
343 qa = tp->t_dqinfo->dqs[j];
344 if (qa[0].qt_dquot == NULL)
345 continue;
346
347 /*
348 * Lock all of the dquots and join them to the transaction.
349 */
350 xfs_trans_dqlockedjoin(tp, qa);
351
352 for (i = 0; i < XFS_QM_TRANS_MAXDQS; i++) {
353 qtrx = &qa[i];
354 /*
355 * The array of dquots is filled
356 * sequentially, not sparsely.
357 */
358 if ((dqp = qtrx->qt_dquot) == NULL)
359 break;
360
361 ASSERT(XFS_DQ_IS_LOCKED(dqp));
362 ASSERT(dqp->q_transp == tp);
363
364 /*
365 * adjust the actual number of blocks used
366 */
367 d = &dqp->q_core;
368
369 /*
370 * The issue here is - sometimes we don't make a blkquota
371 * reservation intentionally to be fair to users
372 * (when the amount is small). On the other hand,
373 * delayed allocs do make reservations, but that's
374 * outside of a transaction, so we have no
375 * idea how much was really reserved.
376 * So, here we've accumulated delayed allocation blks and
377 * non-delay blks. The assumption is that the
378 * delayed ones are always reserved (outside of a
379 * transaction), and the others may or may not have
380 * quota reservations.
381 */
382 totalbdelta = qtrx->qt_bcount_delta +
383 qtrx->qt_delbcnt_delta;
384 totalrtbdelta = qtrx->qt_rtbcount_delta +
385 qtrx->qt_delrtb_delta;
386#ifdef DEBUG
387 if (totalbdelta < 0)
388 ASSERT(be64_to_cpu(d->d_bcount) >=
389 -totalbdelta);
390
391 if (totalrtbdelta < 0)
392 ASSERT(be64_to_cpu(d->d_rtbcount) >=
393 -totalrtbdelta);
394
395 if (qtrx->qt_icount_delta < 0)
396 ASSERT(be64_to_cpu(d->d_icount) >=
397 -qtrx->qt_icount_delta);
398#endif
399 if (totalbdelta)
400 be64_add_cpu(&d->d_bcount, (xfs_qcnt_t)totalbdelta);
401
402 if (qtrx->qt_icount_delta)
403 be64_add_cpu(&d->d_icount, (xfs_qcnt_t)qtrx->qt_icount_delta);
404
405 if (totalrtbdelta)
406 be64_add_cpu(&d->d_rtbcount, (xfs_qcnt_t)totalrtbdelta);
407
408 /*
409 * Get any default limits in use.
410 * Start/reset the timer(s) if needed.
411 */
412 if (d->d_id) {
413 xfs_qm_adjust_dqlimits(tp->t_mountp, dqp);
414 xfs_qm_adjust_dqtimers(tp->t_mountp, d);
415 }
416
417 dqp->dq_flags |= XFS_DQ_DIRTY;
418 /*
419 * add this to the list of items to get logged
420 */
421 xfs_trans_log_dquot(tp, dqp);
422 /*
423 * Take off what's left of the original reservation.
424 * In case of delayed allocations, there's no
425 * reservation that a transaction structure knows of.
426 */
427 if (qtrx->qt_blk_res != 0) {
428 ulong blk_res_used = 0;
429
430 if (qtrx->qt_bcount_delta > 0)
431 blk_res_used = qtrx->qt_bcount_delta;
432
433 if (qtrx->qt_blk_res != blk_res_used) {
434 if (qtrx->qt_blk_res > blk_res_used)
435 dqp->q_res_bcount -= (xfs_qcnt_t)
436 (qtrx->qt_blk_res -
437 blk_res_used);
438 else
439 dqp->q_res_bcount -= (xfs_qcnt_t)
440 (blk_res_used -
441 qtrx->qt_blk_res);
442 }
443 } else {
444 /*
445 * These blks were never reserved, either inside
446 * a transaction or outside one (in a delayed
447 * allocation). Also, this isn't always a
448 * negative number since we sometimes
449 * deliberately skip quota reservations.
450 */
451 if (qtrx->qt_bcount_delta) {
452 dqp->q_res_bcount +=
453 (xfs_qcnt_t)qtrx->qt_bcount_delta;
454 }
455 }
456 /*
457 * Adjust the RT reservation.
458 */
459 if (qtrx->qt_rtblk_res != 0) {
460 if (qtrx->qt_rtblk_res != qtrx->qt_rtblk_res_used) {
461 if (qtrx->qt_rtblk_res >
462 qtrx->qt_rtblk_res_used)
463 dqp->q_res_rtbcount -= (xfs_qcnt_t)
464 (qtrx->qt_rtblk_res -
465 qtrx->qt_rtblk_res_used);
466 else
467 dqp->q_res_rtbcount -= (xfs_qcnt_t)
468 (qtrx->qt_rtblk_res_used -
469 qtrx->qt_rtblk_res);
470 }
471 } else {
472 if (qtrx->qt_rtbcount_delta)
473 dqp->q_res_rtbcount +=
474 (xfs_qcnt_t)qtrx->qt_rtbcount_delta;
475 }
476
477 /*
478 * Adjust the inode reservation.
479 */
480 if (qtrx->qt_ino_res != 0) {
481 ASSERT(qtrx->qt_ino_res >=
482 qtrx->qt_ino_res_used);
483 if (qtrx->qt_ino_res > qtrx->qt_ino_res_used)
484 dqp->q_res_icount -= (xfs_qcnt_t)
485 (qtrx->qt_ino_res -
486 qtrx->qt_ino_res_used);
487 } else {
488 if (qtrx->qt_icount_delta)
489 dqp->q_res_icount +=
490 (xfs_qcnt_t)qtrx->qt_icount_delta;
491 }
492
493 ASSERT(dqp->q_res_bcount >=
494 be64_to_cpu(dqp->q_core.d_bcount));
495 ASSERT(dqp->q_res_icount >=
496 be64_to_cpu(dqp->q_core.d_icount));
497 ASSERT(dqp->q_res_rtbcount >=
498 be64_to_cpu(dqp->q_core.d_rtbcount));
499 }
500 }
501}
502
503/*
504 * Release the reservations, and adjust the dquots accordingly.
505 * This is called only when the transaction is being aborted. If by
506 * any chance we have done dquot modifications incore (ie. deltas) already,
507 * we simply throw those away, since that's the expected behavior
508 * when a transaction is curtailed without a commit.
509 */
510void
511xfs_trans_unreserve_and_mod_dquots(
512 xfs_trans_t *tp)
513{
514 int i, j;
515 xfs_dquot_t *dqp;
516 xfs_dqtrx_t *qtrx, *qa;
517 bool locked;
518
519 if (!tp->t_dqinfo || !(tp->t_flags & XFS_TRANS_DQ_DIRTY))
520 return;
521
522 for (j = 0; j < XFS_QM_TRANS_DQTYPES; j++) {
523 qa = tp->t_dqinfo->dqs[j];
524
525 for (i = 0; i < XFS_QM_TRANS_MAXDQS; i++) {
526 qtrx = &qa[i];
527 /*
528 * We assume that the array of dquots is filled
529 * sequentially, not sparsely.
530 */
531 if ((dqp = qtrx->qt_dquot) == NULL)
532 break;
533 /*
534 * Unreserve the original reservation. We don't care
535 * about the number of blocks used field, or deltas.
536 * Also we don't bother to zero the fields.
537 */
538 locked = false;
539 if (qtrx->qt_blk_res) {
540 xfs_dqlock(dqp);
541 locked = true;
542 dqp->q_res_bcount -=
543 (xfs_qcnt_t)qtrx->qt_blk_res;
544 }
545 if (qtrx->qt_ino_res) {
546 if (!locked) {
547 xfs_dqlock(dqp);
548 locked = true;
549 }
550 dqp->q_res_icount -=
551 (xfs_qcnt_t)qtrx->qt_ino_res;
552 }
553
554 if (qtrx->qt_rtblk_res) {
555 if (!locked) {
556 xfs_dqlock(dqp);
557 locked = true;
558 }
559 dqp->q_res_rtbcount -=
560 (xfs_qcnt_t)qtrx->qt_rtblk_res;
561 }
562 if (locked)
563 xfs_dqunlock(dqp);
564
565 }
566 }
567}
568
569STATIC void
570xfs_quota_warn(
571 struct xfs_mount *mp,
572 struct xfs_dquot *dqp,
573 int type)
574{
575 enum quota_type qtype;
576
577 if (dqp->dq_flags & XFS_DQ_PROJ)
578 qtype = PRJQUOTA;
579 else if (dqp->dq_flags & XFS_DQ_USER)
580 qtype = USRQUOTA;
581 else
582 qtype = GRPQUOTA;
583
584 quota_send_warning(make_kqid(&init_user_ns, qtype,
585 be32_to_cpu(dqp->q_core.d_id)),
586 mp->m_super->s_dev, type);
587}
588
589/*
590 * This reserves disk blocks and inodes against a dquot.
591 * Flags indicate if the dquot is to be locked here and also
592 * if the blk reservation is for RT or regular blocks.
593 * Sending in XFS_QMOPT_FORCE_RES flag skips the quota check.
594 */
595STATIC int
596xfs_trans_dqresv(
597 xfs_trans_t *tp,
598 xfs_mount_t *mp,
599 xfs_dquot_t *dqp,
600 long nblks,
601 long ninos,
602 uint flags)
603{
604 xfs_qcnt_t hardlimit;
605 xfs_qcnt_t softlimit;
606 time_t timer;
607 xfs_qwarncnt_t warns;
608 xfs_qwarncnt_t warnlimit;
609 xfs_qcnt_t total_count;
610 xfs_qcnt_t *resbcountp;
611 xfs_quotainfo_t *q = mp->m_quotainfo;
612 struct xfs_def_quota *defq;
613
614
615 xfs_dqlock(dqp);
616
617 defq = xfs_get_defquota(dqp, q);
618
619 if (flags & XFS_TRANS_DQ_RES_BLKS) {
620 hardlimit = be64_to_cpu(dqp->q_core.d_blk_hardlimit);
621 if (!hardlimit)
622 hardlimit = defq->bhardlimit;
623 softlimit = be64_to_cpu(dqp->q_core.d_blk_softlimit);
624 if (!softlimit)
625 softlimit = defq->bsoftlimit;
626 timer = be32_to_cpu(dqp->q_core.d_btimer);
627 warns = be16_to_cpu(dqp->q_core.d_bwarns);
628 warnlimit = dqp->q_mount->m_quotainfo->qi_bwarnlimit;
629 resbcountp = &dqp->q_res_bcount;
630 } else {
631 ASSERT(flags & XFS_TRANS_DQ_RES_RTBLKS);
632 hardlimit = be64_to_cpu(dqp->q_core.d_rtb_hardlimit);
633 if (!hardlimit)
634 hardlimit = defq->rtbhardlimit;
635 softlimit = be64_to_cpu(dqp->q_core.d_rtb_softlimit);
636 if (!softlimit)
637 softlimit = defq->rtbsoftlimit;
638 timer = be32_to_cpu(dqp->q_core.d_rtbtimer);
639 warns = be16_to_cpu(dqp->q_core.d_rtbwarns);
640 warnlimit = dqp->q_mount->m_quotainfo->qi_rtbwarnlimit;
641 resbcountp = &dqp->q_res_rtbcount;
642 }
643
644 if ((flags & XFS_QMOPT_FORCE_RES) == 0 &&
645 dqp->q_core.d_id &&
646 ((XFS_IS_UQUOTA_ENFORCED(dqp->q_mount) && XFS_QM_ISUDQ(dqp)) ||
647 (XFS_IS_GQUOTA_ENFORCED(dqp->q_mount) && XFS_QM_ISGDQ(dqp)) ||
648 (XFS_IS_PQUOTA_ENFORCED(dqp->q_mount) && XFS_QM_ISPDQ(dqp)))) {
649 if (nblks > 0) {
650 /*
651 * dquot is locked already. See if we'd go over the
652 * hardlimit or exceed the timelimit if we allocate
653 * nblks.
654 */
655 total_count = *resbcountp + nblks;
656 if (hardlimit && total_count > hardlimit) {
657 xfs_quota_warn(mp, dqp, QUOTA_NL_BHARDWARN);
658 goto error_return;
659 }
660 if (softlimit && total_count > softlimit) {
661 if ((timer != 0 && get_seconds() > timer) ||
662 (warns != 0 && warns >= warnlimit)) {
663 xfs_quota_warn(mp, dqp,
664 QUOTA_NL_BSOFTLONGWARN);
665 goto error_return;
666 }
667
668 xfs_quota_warn(mp, dqp, QUOTA_NL_BSOFTWARN);
669 }
670 }
671 if (ninos > 0) {
672 total_count = be64_to_cpu(dqp->q_core.d_icount) + ninos;
673 timer = be32_to_cpu(dqp->q_core.d_itimer);
674 warns = be16_to_cpu(dqp->q_core.d_iwarns);
675 warnlimit = dqp->q_mount->m_quotainfo->qi_iwarnlimit;
676 hardlimit = be64_to_cpu(dqp->q_core.d_ino_hardlimit);
677 if (!hardlimit)
678 hardlimit = defq->ihardlimit;
679 softlimit = be64_to_cpu(dqp->q_core.d_ino_softlimit);
680 if (!softlimit)
681 softlimit = defq->isoftlimit;
682
683 if (hardlimit && total_count > hardlimit) {
684 xfs_quota_warn(mp, dqp, QUOTA_NL_IHARDWARN);
685 goto error_return;
686 }
687 if (softlimit && total_count > softlimit) {
688 if ((timer != 0 && get_seconds() > timer) ||
689 (warns != 0 && warns >= warnlimit)) {
690 xfs_quota_warn(mp, dqp,
691 QUOTA_NL_ISOFTLONGWARN);
692 goto error_return;
693 }
694 xfs_quota_warn(mp, dqp, QUOTA_NL_ISOFTWARN);
695 }
696 }
697 }
698
699 /*
700 * Change the reservation, but not the actual usage.
701 * Note that q_res_bcount = q_core.d_bcount + resv
702 */
703 (*resbcountp) += (xfs_qcnt_t)nblks;
704 if (ninos != 0)
705 dqp->q_res_icount += (xfs_qcnt_t)ninos;
706
707 /*
708 * note the reservation amt in the trans struct too,
709 * so that the transaction knows how much was reserved by
710 * it against this particular dquot.
711 * We don't do this when we are reserving for a delayed allocation,
712 * because we don't have the luxury of a transaction envelope then.
713 */
714 if (tp) {
715 ASSERT(tp->t_dqinfo);
716 ASSERT(flags & XFS_QMOPT_RESBLK_MASK);
717 if (nblks != 0)
718 xfs_trans_mod_dquot(tp, dqp,
719 flags & XFS_QMOPT_RESBLK_MASK,
720 nblks);
721 if (ninos != 0)
722 xfs_trans_mod_dquot(tp, dqp,
723 XFS_TRANS_DQ_RES_INOS,
724 ninos);
725 }
726 ASSERT(dqp->q_res_bcount >= be64_to_cpu(dqp->q_core.d_bcount));
727 ASSERT(dqp->q_res_rtbcount >= be64_to_cpu(dqp->q_core.d_rtbcount));
728 ASSERT(dqp->q_res_icount >= be64_to_cpu(dqp->q_core.d_icount));
729
730 xfs_dqunlock(dqp);
731 return 0;
732
733error_return:
734 xfs_dqunlock(dqp);
735 if (flags & XFS_QMOPT_ENOSPC)
736 return -ENOSPC;
737 return -EDQUOT;
738}
739
740
741/*
742 * Given dquot(s), make disk block and/or inode reservations against them.
743 * The fact that this does the reservation against user, group and
744 * project quotas is important, because this follows a all-or-nothing
745 * approach.
746 *
747 * flags = XFS_QMOPT_FORCE_RES evades limit enforcement. Used by chown.
748 * XFS_QMOPT_ENOSPC returns ENOSPC not EDQUOT. Used by pquota.
749 * XFS_TRANS_DQ_RES_BLKS reserves regular disk blocks
750 * XFS_TRANS_DQ_RES_RTBLKS reserves realtime disk blocks
751 * dquots are unlocked on return, if they were not locked by caller.
752 */
753int
754xfs_trans_reserve_quota_bydquots(
755 struct xfs_trans *tp,
756 struct xfs_mount *mp,
757 struct xfs_dquot *udqp,
758 struct xfs_dquot *gdqp,
759 struct xfs_dquot *pdqp,
760 long nblks,
761 long ninos,
762 uint flags)
763{
764 int error;
765
766 if (!XFS_IS_QUOTA_RUNNING(mp) || !XFS_IS_QUOTA_ON(mp))
767 return 0;
768
769 if (tp && tp->t_dqinfo == NULL)
770 xfs_trans_alloc_dqinfo(tp);
771
772 ASSERT(flags & XFS_QMOPT_RESBLK_MASK);
773
774 if (udqp) {
775 error = xfs_trans_dqresv(tp, mp, udqp, nblks, ninos,
776 (flags & ~XFS_QMOPT_ENOSPC));
777 if (error)
778 return error;
779 }
780
781 if (gdqp) {
782 error = xfs_trans_dqresv(tp, mp, gdqp, nblks, ninos, flags);
783 if (error)
784 goto unwind_usr;
785 }
786
787 if (pdqp) {
788 error = xfs_trans_dqresv(tp, mp, pdqp, nblks, ninos, flags);
789 if (error)
790 goto unwind_grp;
791 }
792
793 /*
794 * Didn't change anything critical, so, no need to log
795 */
796 return 0;
797
798unwind_grp:
799 flags |= XFS_QMOPT_FORCE_RES;
800 if (gdqp)
801 xfs_trans_dqresv(tp, mp, gdqp, -nblks, -ninos, flags);
802unwind_usr:
803 flags |= XFS_QMOPT_FORCE_RES;
804 if (udqp)
805 xfs_trans_dqresv(tp, mp, udqp, -nblks, -ninos, flags);
806 return error;
807}
808
809
810/*
811 * Lock the dquot and change the reservation if we can.
812 * This doesn't change the actual usage, just the reservation.
813 * The inode sent in is locked.
814 */
815int
816xfs_trans_reserve_quota_nblks(
817 struct xfs_trans *tp,
818 struct xfs_inode *ip,
819 long nblks,
820 long ninos,
821 uint flags)
822{
823 struct xfs_mount *mp = ip->i_mount;
824
825 if (!XFS_IS_QUOTA_RUNNING(mp) || !XFS_IS_QUOTA_ON(mp))
826 return 0;
827 if (XFS_IS_PQUOTA_ON(mp))
828 flags |= XFS_QMOPT_ENOSPC;
829
830 ASSERT(!xfs_is_quota_inode(&mp->m_sb, ip->i_ino));
831
832 ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL));
833 ASSERT((flags & ~(XFS_QMOPT_FORCE_RES | XFS_QMOPT_ENOSPC)) ==
834 XFS_TRANS_DQ_RES_RTBLKS ||
835 (flags & ~(XFS_QMOPT_FORCE_RES | XFS_QMOPT_ENOSPC)) ==
836 XFS_TRANS_DQ_RES_BLKS);
837
838 /*
839 * Reserve nblks against these dquots, with trans as the mediator.
840 */
841 return xfs_trans_reserve_quota_bydquots(tp, mp,
842 ip->i_udquot, ip->i_gdquot,
843 ip->i_pdquot,
844 nblks, ninos, flags);
845}
846
847/*
848 * This routine is called to allocate a quotaoff log item.
849 */
850xfs_qoff_logitem_t *
851xfs_trans_get_qoff_item(
852 xfs_trans_t *tp,
853 xfs_qoff_logitem_t *startqoff,
854 uint flags)
855{
856 xfs_qoff_logitem_t *q;
857
858 ASSERT(tp != NULL);
859
860 q = xfs_qm_qoff_logitem_init(tp->t_mountp, startqoff, flags);
861 ASSERT(q != NULL);
862
863 /*
864 * Get a log_item_desc to point at the new item.
865 */
866 xfs_trans_add_item(tp, &q->qql_item);
867 return q;
868}
869
870
871/*
872 * This is called to mark the quotaoff logitem as needing
873 * to be logged when the transaction is committed. The logitem must
874 * already be associated with the given transaction.
875 */
876void
877xfs_trans_log_quotaoff_item(
878 xfs_trans_t *tp,
879 xfs_qoff_logitem_t *qlp)
880{
881 tp->t_flags |= XFS_TRANS_DIRTY;
882 qlp->qql_item.li_desc->lid_flags |= XFS_LID_DIRTY;
883}
884
885STATIC void
886xfs_trans_alloc_dqinfo(
887 xfs_trans_t *tp)
888{
889 tp->t_dqinfo = kmem_zone_zalloc(xfs_qm_dqtrxzone, KM_SLEEP);
890}
891
892void
893xfs_trans_free_dqinfo(
894 xfs_trans_t *tp)
895{
896 if (!tp->t_dqinfo)
897 return;
898 kmem_zone_free(xfs_qm_dqtrxzone, tp->t_dqinfo);
899 tp->t_dqinfo = NULL;
900}