Loading...
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}
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_bit.h"
21#include "xfs_log.h"
22#include "xfs_inum.h"
23#include "xfs_trans.h"
24#include "xfs_sb.h"
25#include "xfs_ag.h"
26#include "xfs_alloc.h"
27#include "xfs_quota.h"
28#include "xfs_mount.h"
29#include "xfs_bmap_btree.h"
30#include "xfs_inode.h"
31#include "xfs_itable.h"
32#include "xfs_bmap.h"
33#include "xfs_rtalloc.h"
34#include "xfs_error.h"
35#include "xfs_attr.h"
36#include "xfs_buf_item.h"
37#include "xfs_trans_priv.h"
38#include "xfs_qm.h"
39
40STATIC void xfs_trans_alloc_dqinfo(xfs_trans_t *);
41
42/*
43 * Add the locked dquot to the transaction.
44 * The dquot must be locked, and it cannot be associated with any
45 * transaction.
46 */
47void
48xfs_trans_dqjoin(
49 xfs_trans_t *tp,
50 xfs_dquot_t *dqp)
51{
52 ASSERT(dqp->q_transp != tp);
53 ASSERT(XFS_DQ_IS_LOCKED(dqp));
54 ASSERT(dqp->q_logitem.qli_dquot == dqp);
55
56 /*
57 * Get a log_item_desc to point at the new item.
58 */
59 xfs_trans_add_item(tp, &dqp->q_logitem.qli_item);
60
61 /*
62 * Initialize d_transp so we can later determine if this dquot is
63 * associated with this transaction.
64 */
65 dqp->q_transp = tp;
66}
67
68
69/*
70 * This is called to mark the dquot as needing
71 * to be logged when the transaction is committed. The dquot must
72 * already be associated with the given transaction.
73 * Note that it marks the entire transaction as dirty. In the ordinary
74 * case, this gets called via xfs_trans_commit, after the transaction
75 * is already dirty. However, there's nothing stop this from getting
76 * called directly, as done by xfs_qm_scall_setqlim. Hence, the TRANS_DIRTY
77 * flag.
78 */
79void
80xfs_trans_log_dquot(
81 xfs_trans_t *tp,
82 xfs_dquot_t *dqp)
83{
84 ASSERT(dqp->q_transp == tp);
85 ASSERT(XFS_DQ_IS_LOCKED(dqp));
86
87 tp->t_flags |= XFS_TRANS_DIRTY;
88 dqp->q_logitem.qli_item.li_desc->lid_flags |= XFS_LID_DIRTY;
89}
90
91/*
92 * Carry forward whatever is left of the quota blk reservation to
93 * the spanky new transaction
94 */
95void
96xfs_trans_dup_dqinfo(
97 xfs_trans_t *otp,
98 xfs_trans_t *ntp)
99{
100 xfs_dqtrx_t *oq, *nq;
101 int i,j;
102 xfs_dqtrx_t *oqa, *nqa;
103
104 if (!otp->t_dqinfo)
105 return;
106
107 xfs_trans_alloc_dqinfo(ntp);
108 oqa = otp->t_dqinfo->dqa_usrdquots;
109 nqa = ntp->t_dqinfo->dqa_usrdquots;
110
111 /*
112 * Because the quota blk reservation is carried forward,
113 * it is also necessary to carry forward the DQ_DIRTY flag.
114 */
115 if(otp->t_flags & XFS_TRANS_DQ_DIRTY)
116 ntp->t_flags |= XFS_TRANS_DQ_DIRTY;
117
118 for (j = 0; j < 2; j++) {
119 for (i = 0; i < XFS_QM_TRANS_MAXDQS; i++) {
120 if (oqa[i].qt_dquot == NULL)
121 break;
122 oq = &oqa[i];
123 nq = &nqa[i];
124
125 nq->qt_dquot = oq->qt_dquot;
126 nq->qt_bcount_delta = nq->qt_icount_delta = 0;
127 nq->qt_rtbcount_delta = 0;
128
129 /*
130 * Transfer whatever is left of the reservations.
131 */
132 nq->qt_blk_res = oq->qt_blk_res - oq->qt_blk_res_used;
133 oq->qt_blk_res = oq->qt_blk_res_used;
134
135 nq->qt_rtblk_res = oq->qt_rtblk_res -
136 oq->qt_rtblk_res_used;
137 oq->qt_rtblk_res = oq->qt_rtblk_res_used;
138
139 nq->qt_ino_res = oq->qt_ino_res - oq->qt_ino_res_used;
140 oq->qt_ino_res = oq->qt_ino_res_used;
141
142 }
143 oqa = otp->t_dqinfo->dqa_grpdquots;
144 nqa = ntp->t_dqinfo->dqa_grpdquots;
145 }
146}
147
148/*
149 * Wrap around mod_dquot to account for both user and group quotas.
150 */
151void
152xfs_trans_mod_dquot_byino(
153 xfs_trans_t *tp,
154 xfs_inode_t *ip,
155 uint field,
156 long delta)
157{
158 xfs_mount_t *mp = tp->t_mountp;
159
160 if (!XFS_IS_QUOTA_RUNNING(mp) ||
161 !XFS_IS_QUOTA_ON(mp) ||
162 ip->i_ino == mp->m_sb.sb_uquotino ||
163 ip->i_ino == mp->m_sb.sb_gquotino)
164 return;
165
166 if (tp->t_dqinfo == NULL)
167 xfs_trans_alloc_dqinfo(tp);
168
169 if (XFS_IS_UQUOTA_ON(mp) && ip->i_udquot)
170 (void) xfs_trans_mod_dquot(tp, ip->i_udquot, field, delta);
171 if (XFS_IS_OQUOTA_ON(mp) && ip->i_gdquot)
172 (void) xfs_trans_mod_dquot(tp, ip->i_gdquot, field, delta);
173}
174
175STATIC xfs_dqtrx_t *
176xfs_trans_get_dqtrx(
177 xfs_trans_t *tp,
178 xfs_dquot_t *dqp)
179{
180 int i;
181 xfs_dqtrx_t *qa;
182
183 qa = XFS_QM_ISUDQ(dqp) ?
184 tp->t_dqinfo->dqa_usrdquots : tp->t_dqinfo->dqa_grpdquots;
185
186 for (i = 0; i < XFS_QM_TRANS_MAXDQS; i++) {
187 if (qa[i].qt_dquot == NULL ||
188 qa[i].qt_dquot == dqp)
189 return &qa[i];
190 }
191
192 return NULL;
193}
194
195/*
196 * Make the changes in the transaction structure.
197 * The moral equivalent to xfs_trans_mod_sb().
198 * We don't touch any fields in the dquot, so we don't care
199 * if it's locked or not (most of the time it won't be).
200 */
201void
202xfs_trans_mod_dquot(
203 xfs_trans_t *tp,
204 xfs_dquot_t *dqp,
205 uint field,
206 long delta)
207{
208 xfs_dqtrx_t *qtrx;
209
210 ASSERT(tp);
211 ASSERT(XFS_IS_QUOTA_RUNNING(tp->t_mountp));
212 qtrx = NULL;
213
214 if (tp->t_dqinfo == NULL)
215 xfs_trans_alloc_dqinfo(tp);
216 /*
217 * Find either the first free slot or the slot that belongs
218 * to this dquot.
219 */
220 qtrx = xfs_trans_get_dqtrx(tp, dqp);
221 ASSERT(qtrx);
222 if (qtrx->qt_dquot == NULL)
223 qtrx->qt_dquot = dqp;
224
225 switch (field) {
226
227 /*
228 * regular disk blk reservation
229 */
230 case XFS_TRANS_DQ_RES_BLKS:
231 qtrx->qt_blk_res += (ulong)delta;
232 break;
233
234 /*
235 * inode reservation
236 */
237 case XFS_TRANS_DQ_RES_INOS:
238 qtrx->qt_ino_res += (ulong)delta;
239 break;
240
241 /*
242 * disk blocks used.
243 */
244 case XFS_TRANS_DQ_BCOUNT:
245 if (qtrx->qt_blk_res && delta > 0) {
246 qtrx->qt_blk_res_used += (ulong)delta;
247 ASSERT(qtrx->qt_blk_res >= qtrx->qt_blk_res_used);
248 }
249 qtrx->qt_bcount_delta += delta;
250 break;
251
252 case XFS_TRANS_DQ_DELBCOUNT:
253 qtrx->qt_delbcnt_delta += delta;
254 break;
255
256 /*
257 * Inode Count
258 */
259 case XFS_TRANS_DQ_ICOUNT:
260 if (qtrx->qt_ino_res && delta > 0) {
261 qtrx->qt_ino_res_used += (ulong)delta;
262 ASSERT(qtrx->qt_ino_res >= qtrx->qt_ino_res_used);
263 }
264 qtrx->qt_icount_delta += delta;
265 break;
266
267 /*
268 * rtblk reservation
269 */
270 case XFS_TRANS_DQ_RES_RTBLKS:
271 qtrx->qt_rtblk_res += (ulong)delta;
272 break;
273
274 /*
275 * rtblk count
276 */
277 case XFS_TRANS_DQ_RTBCOUNT:
278 if (qtrx->qt_rtblk_res && delta > 0) {
279 qtrx->qt_rtblk_res_used += (ulong)delta;
280 ASSERT(qtrx->qt_rtblk_res >= qtrx->qt_rtblk_res_used);
281 }
282 qtrx->qt_rtbcount_delta += delta;
283 break;
284
285 case XFS_TRANS_DQ_DELRTBCOUNT:
286 qtrx->qt_delrtb_delta += delta;
287 break;
288
289 default:
290 ASSERT(0);
291 }
292 tp->t_flags |= XFS_TRANS_DQ_DIRTY;
293}
294
295
296/*
297 * Given an array of dqtrx structures, lock all the dquots associated
298 * and join them to the transaction, provided they have been modified.
299 * We know that the highest number of dquots (of one type - usr OR grp),
300 * involved in a transaction is 2 and that both usr and grp combined - 3.
301 * So, we don't attempt to make this very generic.
302 */
303STATIC void
304xfs_trans_dqlockedjoin(
305 xfs_trans_t *tp,
306 xfs_dqtrx_t *q)
307{
308 ASSERT(q[0].qt_dquot != NULL);
309 if (q[1].qt_dquot == NULL) {
310 xfs_dqlock(q[0].qt_dquot);
311 xfs_trans_dqjoin(tp, q[0].qt_dquot);
312 } else {
313 ASSERT(XFS_QM_TRANS_MAXDQS == 2);
314 xfs_dqlock2(q[0].qt_dquot, q[1].qt_dquot);
315 xfs_trans_dqjoin(tp, q[0].qt_dquot);
316 xfs_trans_dqjoin(tp, q[1].qt_dquot);
317 }
318}
319
320
321/*
322 * Called by xfs_trans_commit() and similar in spirit to
323 * xfs_trans_apply_sb_deltas().
324 * Go thru all the dquots belonging to this transaction and modify the
325 * INCORE dquot to reflect the actual usages.
326 * Unreserve just the reservations done by this transaction.
327 * dquot is still left locked at exit.
328 */
329void
330xfs_trans_apply_dquot_deltas(
331 xfs_trans_t *tp)
332{
333 int i, j;
334 xfs_dquot_t *dqp;
335 xfs_dqtrx_t *qtrx, *qa;
336 xfs_disk_dquot_t *d;
337 long totalbdelta;
338 long totalrtbdelta;
339
340 if (!(tp->t_flags & XFS_TRANS_DQ_DIRTY))
341 return;
342
343 ASSERT(tp->t_dqinfo);
344 qa = tp->t_dqinfo->dqa_usrdquots;
345 for (j = 0; j < 2; j++) {
346 if (qa[0].qt_dquot == NULL) {
347 qa = tp->t_dqinfo->dqa_grpdquots;
348 continue;
349 }
350
351 /*
352 * Lock all of the dquots and join them to the transaction.
353 */
354 xfs_trans_dqlockedjoin(tp, qa);
355
356 for (i = 0; i < XFS_QM_TRANS_MAXDQS; i++) {
357 qtrx = &qa[i];
358 /*
359 * The array of dquots is filled
360 * sequentially, not sparsely.
361 */
362 if ((dqp = qtrx->qt_dquot) == NULL)
363 break;
364
365 ASSERT(XFS_DQ_IS_LOCKED(dqp));
366 ASSERT(dqp->q_transp == tp);
367
368 /*
369 * adjust the actual number of blocks used
370 */
371 d = &dqp->q_core;
372
373 /*
374 * The issue here is - sometimes we don't make a blkquota
375 * reservation intentionally to be fair to users
376 * (when the amount is small). On the other hand,
377 * delayed allocs do make reservations, but that's
378 * outside of a transaction, so we have no
379 * idea how much was really reserved.
380 * So, here we've accumulated delayed allocation blks and
381 * non-delay blks. The assumption is that the
382 * delayed ones are always reserved (outside of a
383 * transaction), and the others may or may not have
384 * quota reservations.
385 */
386 totalbdelta = qtrx->qt_bcount_delta +
387 qtrx->qt_delbcnt_delta;
388 totalrtbdelta = qtrx->qt_rtbcount_delta +
389 qtrx->qt_delrtb_delta;
390#ifdef DEBUG
391 if (totalbdelta < 0)
392 ASSERT(be64_to_cpu(d->d_bcount) >=
393 -totalbdelta);
394
395 if (totalrtbdelta < 0)
396 ASSERT(be64_to_cpu(d->d_rtbcount) >=
397 -totalrtbdelta);
398
399 if (qtrx->qt_icount_delta < 0)
400 ASSERT(be64_to_cpu(d->d_icount) >=
401 -qtrx->qt_icount_delta);
402#endif
403 if (totalbdelta)
404 be64_add_cpu(&d->d_bcount, (xfs_qcnt_t)totalbdelta);
405
406 if (qtrx->qt_icount_delta)
407 be64_add_cpu(&d->d_icount, (xfs_qcnt_t)qtrx->qt_icount_delta);
408
409 if (totalrtbdelta)
410 be64_add_cpu(&d->d_rtbcount, (xfs_qcnt_t)totalrtbdelta);
411
412 /*
413 * Get any default limits in use.
414 * Start/reset the timer(s) if needed.
415 */
416 if (d->d_id) {
417 xfs_qm_adjust_dqlimits(tp->t_mountp, d);
418 xfs_qm_adjust_dqtimers(tp->t_mountp, d);
419 }
420
421 dqp->dq_flags |= XFS_DQ_DIRTY;
422 /*
423 * add this to the list of items to get logged
424 */
425 xfs_trans_log_dquot(tp, dqp);
426 /*
427 * Take off what's left of the original reservation.
428 * In case of delayed allocations, there's no
429 * reservation that a transaction structure knows of.
430 */
431 if (qtrx->qt_blk_res != 0) {
432 if (qtrx->qt_blk_res != qtrx->qt_blk_res_used) {
433 if (qtrx->qt_blk_res >
434 qtrx->qt_blk_res_used)
435 dqp->q_res_bcount -= (xfs_qcnt_t)
436 (qtrx->qt_blk_res -
437 qtrx->qt_blk_res_used);
438 else
439 dqp->q_res_bcount -= (xfs_qcnt_t)
440 (qtrx->qt_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 * Do the group quotas next
502 */
503 qa = tp->t_dqinfo->dqa_grpdquots;
504 }
505}
506
507/*
508 * Release the reservations, and adjust the dquots accordingly.
509 * This is called only when the transaction is being aborted. If by
510 * any chance we have done dquot modifications incore (ie. deltas) already,
511 * we simply throw those away, since that's the expected behavior
512 * when a transaction is curtailed without a commit.
513 */
514void
515xfs_trans_unreserve_and_mod_dquots(
516 xfs_trans_t *tp)
517{
518 int i, j;
519 xfs_dquot_t *dqp;
520 xfs_dqtrx_t *qtrx, *qa;
521 boolean_t locked;
522
523 if (!tp->t_dqinfo || !(tp->t_flags & XFS_TRANS_DQ_DIRTY))
524 return;
525
526 qa = tp->t_dqinfo->dqa_usrdquots;
527
528 for (j = 0; j < 2; j++) {
529 for (i = 0; i < XFS_QM_TRANS_MAXDQS; i++) {
530 qtrx = &qa[i];
531 /*
532 * We assume that the array of dquots is filled
533 * sequentially, not sparsely.
534 */
535 if ((dqp = qtrx->qt_dquot) == NULL)
536 break;
537 /*
538 * Unreserve the original reservation. We don't care
539 * about the number of blocks used field, or deltas.
540 * Also we don't bother to zero the fields.
541 */
542 locked = B_FALSE;
543 if (qtrx->qt_blk_res) {
544 xfs_dqlock(dqp);
545 locked = B_TRUE;
546 dqp->q_res_bcount -=
547 (xfs_qcnt_t)qtrx->qt_blk_res;
548 }
549 if (qtrx->qt_ino_res) {
550 if (!locked) {
551 xfs_dqlock(dqp);
552 locked = B_TRUE;
553 }
554 dqp->q_res_icount -=
555 (xfs_qcnt_t)qtrx->qt_ino_res;
556 }
557
558 if (qtrx->qt_rtblk_res) {
559 if (!locked) {
560 xfs_dqlock(dqp);
561 locked = B_TRUE;
562 }
563 dqp->q_res_rtbcount -=
564 (xfs_qcnt_t)qtrx->qt_rtblk_res;
565 }
566 if (locked)
567 xfs_dqunlock(dqp);
568
569 }
570 qa = tp->t_dqinfo->dqa_grpdquots;
571 }
572}
573
574STATIC void
575xfs_quota_warn(
576 struct xfs_mount *mp,
577 struct xfs_dquot *dqp,
578 int type)
579{
580 /* no warnings for project quotas - we just return ENOSPC later */
581 if (dqp->dq_flags & XFS_DQ_PROJ)
582 return;
583 quota_send_warning((dqp->dq_flags & XFS_DQ_USER) ? USRQUOTA : GRPQUOTA,
584 be32_to_cpu(dqp->q_core.d_id), mp->m_super->s_dev,
585 type);
586}
587
588/*
589 * This reserves disk blocks and inodes against a dquot.
590 * Flags indicate if the dquot is to be locked here and also
591 * if the blk reservation is for RT or regular blocks.
592 * Sending in XFS_QMOPT_FORCE_RES flag skips the quota check.
593 */
594STATIC int
595xfs_trans_dqresv(
596 xfs_trans_t *tp,
597 xfs_mount_t *mp,
598 xfs_dquot_t *dqp,
599 long nblks,
600 long ninos,
601 uint flags)
602{
603 xfs_qcnt_t hardlimit;
604 xfs_qcnt_t softlimit;
605 time_t timer;
606 xfs_qwarncnt_t warns;
607 xfs_qwarncnt_t warnlimit;
608 xfs_qcnt_t count;
609 xfs_qcnt_t *resbcountp;
610 xfs_quotainfo_t *q = mp->m_quotainfo;
611
612
613 xfs_dqlock(dqp);
614
615 if (flags & XFS_TRANS_DQ_RES_BLKS) {
616 hardlimit = be64_to_cpu(dqp->q_core.d_blk_hardlimit);
617 if (!hardlimit)
618 hardlimit = q->qi_bhardlimit;
619 softlimit = be64_to_cpu(dqp->q_core.d_blk_softlimit);
620 if (!softlimit)
621 softlimit = q->qi_bsoftlimit;
622 timer = be32_to_cpu(dqp->q_core.d_btimer);
623 warns = be16_to_cpu(dqp->q_core.d_bwarns);
624 warnlimit = dqp->q_mount->m_quotainfo->qi_bwarnlimit;
625 resbcountp = &dqp->q_res_bcount;
626 } else {
627 ASSERT(flags & XFS_TRANS_DQ_RES_RTBLKS);
628 hardlimit = be64_to_cpu(dqp->q_core.d_rtb_hardlimit);
629 if (!hardlimit)
630 hardlimit = q->qi_rtbhardlimit;
631 softlimit = be64_to_cpu(dqp->q_core.d_rtb_softlimit);
632 if (!softlimit)
633 softlimit = q->qi_rtbsoftlimit;
634 timer = be32_to_cpu(dqp->q_core.d_rtbtimer);
635 warns = be16_to_cpu(dqp->q_core.d_rtbwarns);
636 warnlimit = dqp->q_mount->m_quotainfo->qi_rtbwarnlimit;
637 resbcountp = &dqp->q_res_rtbcount;
638 }
639
640 if ((flags & XFS_QMOPT_FORCE_RES) == 0 &&
641 dqp->q_core.d_id &&
642 ((XFS_IS_UQUOTA_ENFORCED(dqp->q_mount) && XFS_QM_ISUDQ(dqp)) ||
643 (XFS_IS_OQUOTA_ENFORCED(dqp->q_mount) &&
644 (XFS_QM_ISPDQ(dqp) || XFS_QM_ISGDQ(dqp))))) {
645 if (nblks > 0) {
646 /*
647 * dquot is locked already. See if we'd go over the
648 * hardlimit or exceed the timelimit if we allocate
649 * nblks.
650 */
651 if (hardlimit > 0ULL &&
652 hardlimit <= nblks + *resbcountp) {
653 xfs_quota_warn(mp, dqp, QUOTA_NL_BHARDWARN);
654 goto error_return;
655 }
656 if (softlimit > 0ULL &&
657 softlimit <= nblks + *resbcountp) {
658 if ((timer != 0 && get_seconds() > timer) ||
659 (warns != 0 && warns >= warnlimit)) {
660 xfs_quota_warn(mp, dqp,
661 QUOTA_NL_BSOFTLONGWARN);
662 goto error_return;
663 }
664
665 xfs_quota_warn(mp, dqp, QUOTA_NL_BSOFTWARN);
666 }
667 }
668 if (ninos > 0) {
669 count = be64_to_cpu(dqp->q_core.d_icount);
670 timer = be32_to_cpu(dqp->q_core.d_itimer);
671 warns = be16_to_cpu(dqp->q_core.d_iwarns);
672 warnlimit = dqp->q_mount->m_quotainfo->qi_iwarnlimit;
673 hardlimit = be64_to_cpu(dqp->q_core.d_ino_hardlimit);
674 if (!hardlimit)
675 hardlimit = q->qi_ihardlimit;
676 softlimit = be64_to_cpu(dqp->q_core.d_ino_softlimit);
677 if (!softlimit)
678 softlimit = q->qi_isoftlimit;
679
680 if (hardlimit > 0ULL && count >= hardlimit) {
681 xfs_quota_warn(mp, dqp, QUOTA_NL_IHARDWARN);
682 goto error_return;
683 }
684 if (softlimit > 0ULL && count >= softlimit) {
685 if ((timer != 0 && get_seconds() > timer) ||
686 (warns != 0 && warns >= warnlimit)) {
687 xfs_quota_warn(mp, dqp,
688 QUOTA_NL_ISOFTLONGWARN);
689 goto error_return;
690 }
691 xfs_quota_warn(mp, dqp, QUOTA_NL_ISOFTWARN);
692 }
693 }
694 }
695
696 /*
697 * Change the reservation, but not the actual usage.
698 * Note that q_res_bcount = q_core.d_bcount + resv
699 */
700 (*resbcountp) += (xfs_qcnt_t)nblks;
701 if (ninos != 0)
702 dqp->q_res_icount += (xfs_qcnt_t)ninos;
703
704 /*
705 * note the reservation amt in the trans struct too,
706 * so that the transaction knows how much was reserved by
707 * it against this particular dquot.
708 * We don't do this when we are reserving for a delayed allocation,
709 * because we don't have the luxury of a transaction envelope then.
710 */
711 if (tp) {
712 ASSERT(tp->t_dqinfo);
713 ASSERT(flags & XFS_QMOPT_RESBLK_MASK);
714 if (nblks != 0)
715 xfs_trans_mod_dquot(tp, dqp,
716 flags & XFS_QMOPT_RESBLK_MASK,
717 nblks);
718 if (ninos != 0)
719 xfs_trans_mod_dquot(tp, dqp,
720 XFS_TRANS_DQ_RES_INOS,
721 ninos);
722 }
723 ASSERT(dqp->q_res_bcount >= be64_to_cpu(dqp->q_core.d_bcount));
724 ASSERT(dqp->q_res_rtbcount >= be64_to_cpu(dqp->q_core.d_rtbcount));
725 ASSERT(dqp->q_res_icount >= be64_to_cpu(dqp->q_core.d_icount));
726
727 xfs_dqunlock(dqp);
728 return 0;
729
730error_return:
731 xfs_dqunlock(dqp);
732 if (flags & XFS_QMOPT_ENOSPC)
733 return ENOSPC;
734 return EDQUOT;
735}
736
737
738/*
739 * Given dquot(s), make disk block and/or inode reservations against them.
740 * The fact that this does the reservation against both the usr and
741 * grp/prj quotas is important, because this follows a both-or-nothing
742 * approach.
743 *
744 * flags = XFS_QMOPT_FORCE_RES evades limit enforcement. Used by chown.
745 * XFS_QMOPT_ENOSPC returns ENOSPC not EDQUOT. Used by pquota.
746 * XFS_TRANS_DQ_RES_BLKS reserves regular disk blocks
747 * XFS_TRANS_DQ_RES_RTBLKS reserves realtime disk blocks
748 * dquots are unlocked on return, if they were not locked by caller.
749 */
750int
751xfs_trans_reserve_quota_bydquots(
752 xfs_trans_t *tp,
753 xfs_mount_t *mp,
754 xfs_dquot_t *udqp,
755 xfs_dquot_t *gdqp,
756 long nblks,
757 long ninos,
758 uint flags)
759{
760 int resvd = 0, error;
761
762 if (!XFS_IS_QUOTA_RUNNING(mp) || !XFS_IS_QUOTA_ON(mp))
763 return 0;
764
765 if (tp && tp->t_dqinfo == NULL)
766 xfs_trans_alloc_dqinfo(tp);
767
768 ASSERT(flags & XFS_QMOPT_RESBLK_MASK);
769
770 if (udqp) {
771 error = xfs_trans_dqresv(tp, mp, udqp, nblks, ninos,
772 (flags & ~XFS_QMOPT_ENOSPC));
773 if (error)
774 return error;
775 resvd = 1;
776 }
777
778 if (gdqp) {
779 error = xfs_trans_dqresv(tp, mp, gdqp, nblks, ninos, flags);
780 if (error) {
781 /*
782 * can't do it, so backout previous reservation
783 */
784 if (resvd) {
785 flags |= XFS_QMOPT_FORCE_RES;
786 xfs_trans_dqresv(tp, mp, udqp,
787 -nblks, -ninos, flags);
788 }
789 return error;
790 }
791 }
792
793 /*
794 * Didn't change anything critical, so, no need to log
795 */
796 return 0;
797}
798
799
800/*
801 * Lock the dquot and change the reservation if we can.
802 * This doesn't change the actual usage, just the reservation.
803 * The inode sent in is locked.
804 */
805int
806xfs_trans_reserve_quota_nblks(
807 struct xfs_trans *tp,
808 struct xfs_inode *ip,
809 long nblks,
810 long ninos,
811 uint flags)
812{
813 struct xfs_mount *mp = ip->i_mount;
814
815 if (!XFS_IS_QUOTA_RUNNING(mp) || !XFS_IS_QUOTA_ON(mp))
816 return 0;
817 if (XFS_IS_PQUOTA_ON(mp))
818 flags |= XFS_QMOPT_ENOSPC;
819
820 ASSERT(ip->i_ino != mp->m_sb.sb_uquotino);
821 ASSERT(ip->i_ino != mp->m_sb.sb_gquotino);
822
823 ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL));
824 ASSERT((flags & ~(XFS_QMOPT_FORCE_RES | XFS_QMOPT_ENOSPC)) ==
825 XFS_TRANS_DQ_RES_RTBLKS ||
826 (flags & ~(XFS_QMOPT_FORCE_RES | XFS_QMOPT_ENOSPC)) ==
827 XFS_TRANS_DQ_RES_BLKS);
828
829 /*
830 * Reserve nblks against these dquots, with trans as the mediator.
831 */
832 return xfs_trans_reserve_quota_bydquots(tp, mp,
833 ip->i_udquot, ip->i_gdquot,
834 nblks, ninos, flags);
835}
836
837/*
838 * This routine is called to allocate a quotaoff log item.
839 */
840xfs_qoff_logitem_t *
841xfs_trans_get_qoff_item(
842 xfs_trans_t *tp,
843 xfs_qoff_logitem_t *startqoff,
844 uint flags)
845{
846 xfs_qoff_logitem_t *q;
847
848 ASSERT(tp != NULL);
849
850 q = xfs_qm_qoff_logitem_init(tp->t_mountp, startqoff, flags);
851 ASSERT(q != NULL);
852
853 /*
854 * Get a log_item_desc to point at the new item.
855 */
856 xfs_trans_add_item(tp, &q->qql_item);
857 return q;
858}
859
860
861/*
862 * This is called to mark the quotaoff logitem as needing
863 * to be logged when the transaction is committed. The logitem must
864 * already be associated with the given transaction.
865 */
866void
867xfs_trans_log_quotaoff_item(
868 xfs_trans_t *tp,
869 xfs_qoff_logitem_t *qlp)
870{
871 tp->t_flags |= XFS_TRANS_DIRTY;
872 qlp->qql_item.li_desc->lid_flags |= XFS_LID_DIRTY;
873}
874
875STATIC void
876xfs_trans_alloc_dqinfo(
877 xfs_trans_t *tp)
878{
879 tp->t_dqinfo = kmem_zone_zalloc(xfs_Gqm->qm_dqtrxzone, KM_SLEEP);
880}
881
882void
883xfs_trans_free_dqinfo(
884 xfs_trans_t *tp)
885{
886 if (!tp->t_dqinfo)
887 return;
888 kmem_zone_free(xfs_Gqm->qm_dqtrxzone, tp->t_dqinfo);
889 tp->t_dqinfo = NULL;
890}