?  search:
summary | log | graphiclog1 | graphiclog2 | commit | commitdiff | tree | refs | edit | fork
blame | history | raw | HEAD
openvswitch: Fix MPLS action validation.
[linux-2.6/btrfs-unstable.git] / fs / xfs / xfs_trans_dquot.c
blob76a16df55ef72ef11274cd2e25dc07bc8326dfdd
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
32 STATIC 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 */
39 void
40 xfs_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 */
71 void
72 xfs_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 */
87 void
88 xfs_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
96 if (!otp->t_dqinfo)
97 return;
98
99 xfs_trans_alloc_dqinfo(ntp);
100
101 /*
102 * Because the quota blk reservation is carried forward,
103 * it is also necessary to carry forward the DQ_DIRTY flag.
104 */
105 if(otp->t_flags & XFS_TRANS_DQ_DIRTY)
106 ntp->t_flags |= XFS_TRANS_DQ_DIRTY;
107
108 for (j = 0; j < XFS_QM_TRANS_DQTYPES; j++) {
109 oqa = otp->t_dqinfo->dqs[j];
110 nqa = ntp->t_dqinfo->dqs[j];
111 for (i = 0; i < XFS_QM_TRANS_MAXDQS; i++) {
112 if (oqa[i].qt_dquot == NULL)
113 break;
114 oq = &oqa[i];
115 nq = &nqa[i];
116
117 nq->qt_dquot = oq->qt_dquot;
118 nq->qt_bcount_delta = nq->qt_icount_delta = 0;
119 nq->qt_rtbcount_delta = 0;
120
121 /*
122 * Transfer whatever is left of the reservations.
123 */
124 nq->qt_blk_res = oq->qt_blk_res - oq->qt_blk_res_used;
125 oq->qt_blk_res = oq->qt_blk_res_used;
126
127 nq->qt_rtblk_res = oq->qt_rtblk_res -
128 oq->qt_rtblk_res_used;
129 oq->qt_rtblk_res = oq->qt_rtblk_res_used;
130
131 nq->qt_ino_res = oq->qt_ino_res - oq->qt_ino_res_used;
132 oq->qt_ino_res = oq->qt_ino_res_used;
133
134 }
135 }
136 }
137
138 /*
139 * Wrap around mod_dquot to account for both user and group quotas.
140 */
141 void
142 xfs_trans_mod_dquot_byino(
143 xfs_trans_t *tp,
144 xfs_inode_t *ip,
145 uint field,
146 long delta)
147 {
148 xfs_mount_t *mp = tp->t_mountp;
149
150 if (!XFS_IS_QUOTA_RUNNING(mp) ||
151 !XFS_IS_QUOTA_ON(mp) ||
152 xfs_is_quota_inode(&mp->m_sb, ip->i_ino))
153 return;
154
155 if (tp->t_dqinfo == NULL)
156 xfs_trans_alloc_dqinfo(tp);
157
158 if (XFS_IS_UQUOTA_ON(mp) && ip->i_udquot)
159 (void) xfs_trans_mod_dquot(tp, ip->i_udquot, field, delta);
160 if (XFS_IS_GQUOTA_ON(mp) && ip->i_gdquot)
161 (void) xfs_trans_mod_dquot(tp, ip->i_gdquot, field, delta);
162 if (XFS_IS_PQUOTA_ON(mp) && ip->i_pdquot)
163 (void) xfs_trans_mod_dquot(tp, ip->i_pdquot, field, delta);
164 }
165
166 STATIC struct xfs_dqtrx *
167 xfs_trans_get_dqtrx(
168 struct xfs_trans *tp,
169 struct xfs_dquot *dqp)
170 {
171 int i;
172 struct xfs_dqtrx *qa;
173
174 if (XFS_QM_ISUDQ(dqp))
175 qa = tp->t_dqinfo->dqs[XFS_QM_TRANS_USR];
176 else if (XFS_QM_ISGDQ(dqp))
177 qa = tp->t_dqinfo->dqs[XFS_QM_TRANS_GRP];
178 else if (XFS_QM_ISPDQ(dqp))
179 qa = tp->t_dqinfo->dqs[XFS_QM_TRANS_PRJ];
180 else
181 return NULL;
182
183 for (i = 0; i < XFS_QM_TRANS_MAXDQS; i++) {
184 if (qa[i].qt_dquot == NULL ||
185 qa[i].qt_dquot == dqp)
186 return &qa[i];
187 }
188
189 return NULL;
190 }
191
192 /*
193 * Make the changes in the transaction structure.
194 * The moral equivalent to xfs_trans_mod_sb().
195 * We don't touch any fields in the dquot, so we don't care
196 * if it's locked or not (most of the time it won't be).
197 */
198 void
199 xfs_trans_mod_dquot(
200 xfs_trans_t *tp,
201 xfs_dquot_t *dqp,
202 uint field,
203 long delta)
204 {
205 xfs_dqtrx_t *qtrx;
206
207 ASSERT(tp);
208 ASSERT(XFS_IS_QUOTA_RUNNING(tp->t_mountp));
209 qtrx = NULL;
210
211 if (tp->t_dqinfo == NULL)
212 xfs_trans_alloc_dqinfo(tp);
213 /*
214 * Find either the first free slot or the slot that belongs
215 * to this dquot.
216 */
217 qtrx = xfs_trans_get_dqtrx(tp, dqp);
218 ASSERT(qtrx);
219 if (qtrx->qt_dquot == NULL)
220 qtrx->qt_dquot = dqp;
221
222 switch (field) {
223
224 /*
225 * regular disk blk reservation
226 */
227 case XFS_TRANS_DQ_RES_BLKS:
228 qtrx->qt_blk_res += (ulong)delta;
229 break;
230
231 /*
232 * inode reservation
233 */
234 case XFS_TRANS_DQ_RES_INOS:
235 qtrx->qt_ino_res += (ulong)delta;
236 break;
237
238 /*
239 * disk blocks used.
240 */
241 case XFS_TRANS_DQ_BCOUNT:
242 if (qtrx->qt_blk_res && delta > 0) {
243 qtrx->qt_blk_res_used += (ulong)delta;
244 ASSERT(qtrx->qt_blk_res >= qtrx->qt_blk_res_used);
245 }
246 qtrx->qt_bcount_delta += delta;
247 break;
248
249 case XFS_TRANS_DQ_DELBCOUNT:
250 qtrx->qt_delbcnt_delta += delta;
251 break;
252
253 /*
254 * Inode Count
255 */
256 case XFS_TRANS_DQ_ICOUNT:
257 if (qtrx->qt_ino_res && delta > 0) {
258 qtrx->qt_ino_res_used += (ulong)delta;
259 ASSERT(qtrx->qt_ino_res >= qtrx->qt_ino_res_used);
260 }
261 qtrx->qt_icount_delta += delta;
262 break;
263
264 /*
265 * rtblk reservation
266 */
267 case XFS_TRANS_DQ_RES_RTBLKS:
268 qtrx->qt_rtblk_res += (ulong)delta;
269 break;
270
271 /*
272 * rtblk count
273 */
274 case XFS_TRANS_DQ_RTBCOUNT:
275 if (qtrx->qt_rtblk_res && delta > 0) {
276 qtrx->qt_rtblk_res_used += (ulong)delta;
277 ASSERT(qtrx->qt_rtblk_res >= qtrx->qt_rtblk_res_used);
278 }
279 qtrx->qt_rtbcount_delta += delta;
280 break;
281
282 case XFS_TRANS_DQ_DELRTBCOUNT:
283 qtrx->qt_delrtb_delta += delta;
284 break;
285
286 default:
287 ASSERT(0);
288 }
289 tp->t_flags |= XFS_TRANS_DQ_DIRTY;
290 }
291
292
293 /*
294 * Given an array of dqtrx structures, lock all the dquots associated and join
295 * them to the transaction, provided they have been modified. We know that the
296 * highest number of dquots of one type - usr, grp and prj - involved in a
297 * transaction is 3 so we don't need to make this very generic.
298 */
299 STATIC void
300 xfs_trans_dqlockedjoin(
301 xfs_trans_t *tp,
302 xfs_dqtrx_t *q)
303 {
304 ASSERT(q[0].qt_dquot != NULL);
305 if (q[1].qt_dquot == NULL) {
306 xfs_dqlock(q[0].qt_dquot);
307 xfs_trans_dqjoin(tp, q[0].qt_dquot);
308 } else {
309 ASSERT(XFS_QM_TRANS_MAXDQS == 2);
310 xfs_dqlock2(q[0].qt_dquot, q[1].qt_dquot);
311 xfs_trans_dqjoin(tp, q[0].qt_dquot);
312 xfs_trans_dqjoin(tp, q[1].qt_dquot);
313 }
314 }
315
316
317 /*
318 * Called by xfs_trans_commit() and similar in spirit to
319 * xfs_trans_apply_sb_deltas().
320 * Go thru all the dquots belonging to this transaction and modify the
321 * INCORE dquot to reflect the actual usages.
322 * Unreserve just the reservations done by this transaction.
323 * dquot is still left locked at exit.
324 */
325 void
326 xfs_trans_apply_dquot_deltas(
327 struct xfs_trans *tp)
328 {
329 int i, j;
330 struct xfs_dquot *dqp;
331 struct xfs_dqtrx *qtrx, *qa;
332 struct xfs_disk_dquot *d;
333 long totalbdelta;
334 long totalrtbdelta;
335
336 if (!(tp->t_flags & XFS_TRANS_DQ_DIRTY))
337 return;
338
339 ASSERT(tp->t_dqinfo);
340 for (j = 0; j < XFS_QM_TRANS_DQTYPES; j++) {
341 qa = tp->t_dqinfo->dqs[j];
342 if (qa[0].qt_dquot == NULL)
343 continue;
344
345 /*
346 * Lock all of the dquots and join them to the transaction.
347 */
348 xfs_trans_dqlockedjoin(tp, qa);
349
350 for (i = 0; i < XFS_QM_TRANS_MAXDQS; i++) {
351 qtrx = &qa[i];
352 /*
353 * The array of dquots is filled
354 * sequentially, not sparsely.
355 */
356 if ((dqp = qtrx->qt_dquot) == NULL)
357 break;
358
359 ASSERT(XFS_DQ_IS_LOCKED(dqp));
360 ASSERT(dqp->q_transp == tp);
361
362 /*
363 * adjust the actual number of blocks used
364 */
365 d = &dqp->q_core;
366
367 /*
368 * The issue here is - sometimes we don't make a blkquota
369 * reservation intentionally to be fair to users
370 * (when the amount is small). On the other hand,
371 * delayed allocs do make reservations, but that's
372 * outside of a transaction, so we have no
373 * idea how much was really reserved.
374 * So, here we've accumulated delayed allocation blks and
375 * non-delay blks. The assumption is that the
376 * delayed ones are always reserved (outside of a
377 * transaction), and the others may or may not have
378 * quota reservations.
379 */
380 totalbdelta = qtrx->qt_bcount_delta +
381 qtrx->qt_delbcnt_delta;
382 totalrtbdelta = qtrx->qt_rtbcount_delta +
383 qtrx->qt_delrtb_delta;
384 #ifdef DEBUG
385 if (totalbdelta < 0)
386 ASSERT(be64_to_cpu(d->d_bcount) >=
387 -totalbdelta);
388
389 if (totalrtbdelta < 0)
390 ASSERT(be64_to_cpu(d->d_rtbcount) >=
391 -totalrtbdelta);
392
393 if (qtrx->qt_icount_delta < 0)
394 ASSERT(be64_to_cpu(d->d_icount) >=
395 -qtrx->qt_icount_delta);
396 #endif
397 if (totalbdelta)
398 be64_add_cpu(&d->d_bcount, (xfs_qcnt_t)totalbdelta);
399
400 if (qtrx->qt_icount_delta)
401 be64_add_cpu(&d->d_icount, (xfs_qcnt_t)qtrx->qt_icount_delta);
402
403 if (totalrtbdelta)
404 be64_add_cpu(&d->d_rtbcount, (xfs_qcnt_t)totalrtbdelta);
405
406 /*
407 * Get any default limits in use.
408 * Start/reset the timer(s) if needed.
409 */
410 if (d->d_id) {
411 xfs_qm_adjust_dqlimits(tp->t_mountp, dqp);
412 xfs_qm_adjust_dqtimers(tp->t_mountp, d);
413 }
414
415 dqp->dq_flags |= XFS_DQ_DIRTY;
416 /*
417 * add this to the list of items to get logged
418 */
419 xfs_trans_log_dquot(tp, dqp);
420 /*
421 * Take off what's left of the original reservation.
422 * In case of delayed allocations, there's no
423 * reservation that a transaction structure knows of.
424 */
425 if (qtrx->qt_blk_res != 0) {
426 if (qtrx->qt_blk_res != qtrx->qt_blk_res_used) {
427 if (qtrx->qt_blk_res >
428 qtrx->qt_blk_res_used)
429 dqp->q_res_bcount -= (xfs_qcnt_t)
430 (qtrx->qt_blk_res -
431 qtrx->qt_blk_res_used);
432 else
433 dqp->q_res_bcount -= (xfs_qcnt_t)
434 (qtrx->qt_blk_res_used -
435 qtrx->qt_blk_res);
436 }
437 } else {
438 /*
439 * These blks were never reserved, either inside
440 * a transaction or outside one (in a delayed
441 * allocation). Also, this isn't always a
442 * negative number since we sometimes
443 * deliberately skip quota reservations.
444 */
445 if (qtrx->qt_bcount_delta) {
446 dqp->q_res_bcount +=
447 (xfs_qcnt_t)qtrx->qt_bcount_delta;
448 }
449 }
450 /*
451 * Adjust the RT reservation.
452 */
453 if (qtrx->qt_rtblk_res != 0) {
454 if (qtrx->qt_rtblk_res != qtrx->qt_rtblk_res_used) {
455 if (qtrx->qt_rtblk_res >
456 qtrx->qt_rtblk_res_used)
457 dqp->q_res_rtbcount -= (xfs_qcnt_t)
458 (qtrx->qt_rtblk_res -
459 qtrx->qt_rtblk_res_used);
460 else
461 dqp->q_res_rtbcount -= (xfs_qcnt_t)
462 (qtrx->qt_rtblk_res_used -
463 qtrx->qt_rtblk_res);
464 }
465 } else {
466 if (qtrx->qt_rtbcount_delta)
467 dqp->q_res_rtbcount +=
468 (xfs_qcnt_t)qtrx->qt_rtbcount_delta;
469 }
470
471 /*
472 * Adjust the inode reservation.
473 */
474 if (qtrx->qt_ino_res != 0) {
475 ASSERT(qtrx->qt_ino_res >=
476 qtrx->qt_ino_res_used);
477 if (qtrx->qt_ino_res > qtrx->qt_ino_res_used)
478 dqp->q_res_icount -= (xfs_qcnt_t)
479 (qtrx->qt_ino_res -
480 qtrx->qt_ino_res_used);
481 } else {
482 if (qtrx->qt_icount_delta)
483 dqp->q_res_icount +=
484 (xfs_qcnt_t)qtrx->qt_icount_delta;
485 }
486
487 ASSERT(dqp->q_res_bcount >=
488 be64_to_cpu(dqp->q_core.d_bcount));
489 ASSERT(dqp->q_res_icount >=
490 be64_to_cpu(dqp->q_core.d_icount));
491 ASSERT(dqp->q_res_rtbcount >=
492 be64_to_cpu(dqp->q_core.d_rtbcount));
493 }
494 }
495 }
496
497 /*
498 * Release the reservations, and adjust the dquots accordingly.
499 * This is called only when the transaction is being aborted. If by
500 * any chance we have done dquot modifications incore (ie. deltas) already,
501 * we simply throw those away, since that's the expected behavior
502 * when a transaction is curtailed without a commit.
503 */
504 void
505 xfs_trans_unreserve_and_mod_dquots(
506 xfs_trans_t *tp)
507 {
508 int i, j;
509 xfs_dquot_t *dqp;
510 xfs_dqtrx_t *qtrx, *qa;
511 bool locked;
512
513 if (!tp->t_dqinfo || !(tp->t_flags & XFS_TRANS_DQ_DIRTY))
514 return;
515
516 for (j = 0; j < XFS_QM_TRANS_DQTYPES; j++) {
517 qa = tp->t_dqinfo->dqs[j];
518
519 for (i = 0; i < XFS_QM_TRANS_MAXDQS; i++) {
520 qtrx = &qa[i];
521 /*
522 * We assume that the array of dquots is filled
523 * sequentially, not sparsely.
524 */
525 if ((dqp = qtrx->qt_dquot) == NULL)
526 break;
527 /*
528 * Unreserve the original reservation. We don't care
529 * about the number of blocks used field, or deltas.
530 * Also we don't bother to zero the fields.
531 */
532 locked = false;
533 if (qtrx->qt_blk_res) {
534 xfs_dqlock(dqp);
535 locked = true;
536 dqp->q_res_bcount -=
537 (xfs_qcnt_t)qtrx->qt_blk_res;
538 }
539 if (qtrx->qt_ino_res) {
540 if (!locked) {
541 xfs_dqlock(dqp);
542 locked = true;
543 }
544 dqp->q_res_icount -=
545 (xfs_qcnt_t)qtrx->qt_ino_res;
546 }
547
548 if (qtrx->qt_rtblk_res) {
549 if (!locked) {
550 xfs_dqlock(dqp);
551 locked = true;
552 }
553 dqp->q_res_rtbcount -=
554 (xfs_qcnt_t)qtrx->qt_rtblk_res;
555 }
556 if (locked)
557 xfs_dqunlock(dqp);
558
559 }
560 }
561 }
562
563 STATIC void
564 xfs_quota_warn(
565 struct xfs_mount *mp,
566 struct xfs_dquot *dqp,
567 int type)
568 {
569 /* no warnings for project quotas - we just return ENOSPC later */
570 if (dqp->dq_flags & XFS_DQ_PROJ)
571 return;
572 quota_send_warning(make_kqid(&init_user_ns,
573 (dqp->dq_flags & XFS_DQ_USER) ?
574 USRQUOTA : GRPQUOTA,
575 be32_to_cpu(dqp->q_core.d_id)),
576 mp->m_super->s_dev, type);
577 }
578
579 /*
580 * This reserves disk blocks and inodes against a dquot.
581 * Flags indicate if the dquot is to be locked here and also
582 * if the blk reservation is for RT or regular blocks.
583 * Sending in XFS_QMOPT_FORCE_RES flag skips the quota check.
584 */
585 STATIC int
586 xfs_trans_dqresv(
587 xfs_trans_t *tp,
588 xfs_mount_t *mp,
589 xfs_dquot_t *dqp,
590 long nblks,
591 long ninos,
592 uint flags)
593 {
594 xfs_qcnt_t hardlimit;
595 xfs_qcnt_t softlimit;
596 time_t timer;
597 xfs_qwarncnt_t warns;
598 xfs_qwarncnt_t warnlimit;
599 xfs_qcnt_t total_count;
600 xfs_qcnt_t *resbcountp;
601 xfs_quotainfo_t *q = mp->m_quotainfo;
602
603
604 xfs_dqlock(dqp);
605
606 if (flags & XFS_TRANS_DQ_RES_BLKS) {
607 hardlimit = be64_to_cpu(dqp->q_core.d_blk_hardlimit);
608 if (!hardlimit)
609 hardlimit = q->qi_bhardlimit;
610 softlimit = be64_to_cpu(dqp->q_core.d_blk_softlimit);
611 if (!softlimit)
612 softlimit = q->qi_bsoftlimit;
613 timer = be32_to_cpu(dqp->q_core.d_btimer);
614 warns = be16_to_cpu(dqp->q_core.d_bwarns);
615 warnlimit = dqp->q_mount->m_quotainfo->qi_bwarnlimit;
616 resbcountp = &dqp->q_res_bcount;
617 } else {
618 ASSERT(flags & XFS_TRANS_DQ_RES_RTBLKS);
619 hardlimit = be64_to_cpu(dqp->q_core.d_rtb_hardlimit);
620 if (!hardlimit)
621 hardlimit = q->qi_rtbhardlimit;
622 softlimit = be64_to_cpu(dqp->q_core.d_rtb_softlimit);
623 if (!softlimit)
624 softlimit = q->qi_rtbsoftlimit;
625 timer = be32_to_cpu(dqp->q_core.d_rtbtimer);
626 warns = be16_to_cpu(dqp->q_core.d_rtbwarns);
627 warnlimit = dqp->q_mount->m_quotainfo->qi_rtbwarnlimit;
628 resbcountp = &dqp->q_res_rtbcount;
629 }
630
631 if ((flags & XFS_QMOPT_FORCE_RES) == 0 &&
632 dqp->q_core.d_id &&
633 ((XFS_IS_UQUOTA_ENFORCED(dqp->q_mount) && XFS_QM_ISUDQ(dqp)) ||
634 (XFS_IS_GQUOTA_ENFORCED(dqp->q_mount) && XFS_QM_ISGDQ(dqp)) ||
635 (XFS_IS_PQUOTA_ENFORCED(dqp->q_mount) && XFS_QM_ISPDQ(dqp)))) {
636 if (nblks > 0) {
637 /*
638 * dquot is locked already. See if we'd go over the
639 * hardlimit or exceed the timelimit if we allocate
640 * nblks.
641 */
642 total_count = *resbcountp + nblks;
643 if (hardlimit && total_count > hardlimit) {
644 xfs_quota_warn(mp, dqp, QUOTA_NL_BHARDWARN);
645 goto error_return;
646 }
647 if (softlimit && total_count > softlimit) {
648 if ((timer != 0 && get_seconds() > timer) ||
649 (warns != 0 && warns >= warnlimit)) {
650 xfs_quota_warn(mp, dqp,
651 QUOTA_NL_BSOFTLONGWARN);
652 goto error_return;
653 }
654
655 xfs_quota_warn(mp, dqp, QUOTA_NL_BSOFTWARN);
656 }
657 }
658 if (ninos > 0) {
659 total_count = be64_to_cpu(dqp->q_core.d_icount) + ninos;
660 timer = be32_to_cpu(dqp->q_core.d_itimer);
661 warns = be16_to_cpu(dqp->q_core.d_iwarns);
662 warnlimit = dqp->q_mount->m_quotainfo->qi_iwarnlimit;
663 hardlimit = be64_to_cpu(dqp->q_core.d_ino_hardlimit);
664 if (!hardlimit)
665 hardlimit = q->qi_ihardlimit;
666 softlimit = be64_to_cpu(dqp->q_core.d_ino_softlimit);
667 if (!softlimit)
668 softlimit = q->qi_isoftlimit;
669
670 if (hardlimit && total_count > hardlimit) {
671 xfs_quota_warn(mp, dqp, QUOTA_NL_IHARDWARN);
672 goto error_return;
673 }
674 if (softlimit && total_count > softlimit) {
675 if ((timer != 0 && get_seconds() > timer) ||
676 (warns != 0 && warns >= warnlimit)) {
677 xfs_quota_warn(mp, dqp,
678 QUOTA_NL_ISOFTLONGWARN);
679 goto error_return;
680 }
681 xfs_quota_warn(mp, dqp, QUOTA_NL_ISOFTWARN);
682 }
683 }
684 }
685
686 /*
687 * Change the reservation, but not the actual usage.
688 * Note that q_res_bcount = q_core.d_bcount + resv
689 */
690 (*resbcountp) += (xfs_qcnt_t)nblks;
691 if (ninos != 0)
692 dqp->q_res_icount += (xfs_qcnt_t)ninos;
693
694 /*
695 * note the reservation amt in the trans struct too,
696 * so that the transaction knows how much was reserved by
697 * it against this particular dquot.
698 * We don't do this when we are reserving for a delayed allocation,
699 * because we don't have the luxury of a transaction envelope then.
700 */
701 if (tp) {
702 ASSERT(tp->t_dqinfo);
703 ASSERT(flags & XFS_QMOPT_RESBLK_MASK);
704 if (nblks != 0)
705 xfs_trans_mod_dquot(tp, dqp,
706 flags & XFS_QMOPT_RESBLK_MASK,
707 nblks);
708 if (ninos != 0)
709 xfs_trans_mod_dquot(tp, dqp,
710 XFS_TRANS_DQ_RES_INOS,
711 ninos);
712 }
713 ASSERT(dqp->q_res_bcount >= be64_to_cpu(dqp->q_core.d_bcount));
714 ASSERT(dqp->q_res_rtbcount >= be64_to_cpu(dqp->q_core.d_rtbcount));
715 ASSERT(dqp->q_res_icount >= be64_to_cpu(dqp->q_core.d_icount));
716
717 xfs_dqunlock(dqp);
718 return 0;
719
720 error_return:
721 xfs_dqunlock(dqp);
722 if (flags & XFS_QMOPT_ENOSPC)
723 return -ENOSPC;
724 return -EDQUOT;
725 }
726
727
728 /*
729 * Given dquot(s), make disk block and/or inode reservations against them.
730 * The fact that this does the reservation against user, group and
731 * project quotas is important, because this follows a all-or-nothing
732 * approach.
733 *
734 * flags = XFS_QMOPT_FORCE_RES evades limit enforcement. Used by chown.
735 * XFS_QMOPT_ENOSPC returns ENOSPC not EDQUOT. Used by pquota.
736 * XFS_TRANS_DQ_RES_BLKS reserves regular disk blocks
737 * XFS_TRANS_DQ_RES_RTBLKS reserves realtime disk blocks
738 * dquots are unlocked on return, if they were not locked by caller.
739 */
740 int
741 xfs_trans_reserve_quota_bydquots(
742 struct xfs_trans *tp,
743 struct xfs_mount *mp,
744 struct xfs_dquot *udqp,
745 struct xfs_dquot *gdqp,
746 struct xfs_dquot *pdqp,
747 long nblks,
748 long ninos,
749 uint flags)
750 {
751 int error;
752
753 if (!XFS_IS_QUOTA_RUNNING(mp) || !XFS_IS_QUOTA_ON(mp))
754 return 0;
755
756 if (tp && tp->t_dqinfo == NULL)
757 xfs_trans_alloc_dqinfo(tp);
758
759 ASSERT(flags & XFS_QMOPT_RESBLK_MASK);
760
761 if (udqp) {
762 error = xfs_trans_dqresv(tp, mp, udqp, nblks, ninos,
763 (flags & ~XFS_QMOPT_ENOSPC));
764 if (error)
765 return error;
766 }
767
768 if (gdqp) {
769 error = xfs_trans_dqresv(tp, mp, gdqp, nblks, ninos, flags);
770 if (error)
771 goto unwind_usr;
772 }
773
774 if (pdqp) {
775 error = xfs_trans_dqresv(tp, mp, pdqp, nblks, ninos, flags);
776 if (error)
777 goto unwind_grp;
778 }
779
780 /*
781 * Didn't change anything critical, so, no need to log
782 */
783 return 0;
784
785 unwind_grp:
786 flags |= XFS_QMOPT_FORCE_RES;
787 if (gdqp)
788 xfs_trans_dqresv(tp, mp, gdqp, -nblks, -ninos, flags);
789 unwind_usr:
790 flags |= XFS_QMOPT_FORCE_RES;
791 if (udqp)
792 xfs_trans_dqresv(tp, mp, udqp, -nblks, -ninos, flags);
793 return error;
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 */
802 int
803 xfs_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(!xfs_is_quota_inode(&mp->m_sb, ip->i_ino));
818
819 ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL));
820 ASSERT((flags & ~(XFS_QMOPT_FORCE_RES | XFS_QMOPT_ENOSPC)) ==
821 XFS_TRANS_DQ_RES_RTBLKS ||
822 (flags & ~(XFS_QMOPT_FORCE_RES | XFS_QMOPT_ENOSPC)) ==
823 XFS_TRANS_DQ_RES_BLKS);
824
825 /*
826 * Reserve nblks against these dquots, with trans as the mediator.
827 */
828 return xfs_trans_reserve_quota_bydquots(tp, mp,
829 ip->i_udquot, ip->i_gdquot,
830 ip->i_pdquot,
831 nblks, ninos, flags);
832 }
833
834 /*
835 * This routine is called to allocate a quotaoff log item.
836 */
837 xfs_qoff_logitem_t *
838 xfs_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 */
863 void
864 xfs_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
872 STATIC void
873 xfs_trans_alloc_dqinfo(
874 xfs_trans_t *tp)
875 {
876 tp->t_dqinfo = kmem_zone_zalloc(xfs_qm_dqtrxzone, KM_SLEEP);
877 }
878
879 void
880 xfs_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 }
(deprecated) Btrfs devel tree