Merge git://git.infradead.org/users/eparis/audit
[linux-2.6-block.git] / fs / xfs / xfs_trans_dquot.c
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_sb.h"
25 #include "xfs_ag.h"
26 #include "xfs_mount.h"
27 #include "xfs_inode.h"
28 #include "xfs_error.h"
29 #include "xfs_trans.h"
30 #include "xfs_trans_priv.h"
31 #include "xfs_quota.h"
32 #include "xfs_qm.h"
33
34 STATIC void     xfs_trans_alloc_dqinfo(xfs_trans_t *);
35
36 /*
37  * Add the locked dquot to the transaction.
38  * The dquot must be locked, and it cannot be associated with any
39  * transaction.
40  */
41 void
42 xfs_trans_dqjoin(
43         xfs_trans_t     *tp,
44         xfs_dquot_t     *dqp)
45 {
46         ASSERT(dqp->q_transp != tp);
47         ASSERT(XFS_DQ_IS_LOCKED(dqp));
48         ASSERT(dqp->q_logitem.qli_dquot == dqp);
49
50         /*
51          * Get a log_item_desc to point at the new item.
52          */
53         xfs_trans_add_item(tp, &dqp->q_logitem.qli_item);
54
55         /*
56          * Initialize d_transp so we can later determine if this dquot is
57          * associated with this transaction.
58          */
59         dqp->q_transp = tp;
60 }
61
62
63 /*
64  * This is called to mark the dquot as needing
65  * to be logged when the transaction is committed.  The dquot must
66  * already be associated with the given transaction.
67  * Note that it marks the entire transaction as dirty. In the ordinary
68  * case, this gets called via xfs_trans_commit, after the transaction
69  * is already dirty. However, there's nothing stop this from getting
70  * called directly, as done by xfs_qm_scall_setqlim. Hence, the TRANS_DIRTY
71  * flag.
72  */
73 void
74 xfs_trans_log_dquot(
75         xfs_trans_t     *tp,
76         xfs_dquot_t     *dqp)
77 {
78         ASSERT(dqp->q_transp == tp);
79         ASSERT(XFS_DQ_IS_LOCKED(dqp));
80
81         tp->t_flags |= XFS_TRANS_DIRTY;
82         dqp->q_logitem.qli_item.li_desc->lid_flags |= XFS_LID_DIRTY;
83 }
84
85 /*
86  * Carry forward whatever is left of the quota blk reservation to
87  * the spanky new transaction
88  */
89 void
90 xfs_trans_dup_dqinfo(
91         xfs_trans_t     *otp,
92         xfs_trans_t     *ntp)
93 {
94         xfs_dqtrx_t     *oq, *nq;
95         int             i,j;
96         xfs_dqtrx_t     *oqa, *nqa;
97
98         if (!otp->t_dqinfo)
99                 return;
100
101         xfs_trans_alloc_dqinfo(ntp);
102
103         /*
104          * Because the quota blk reservation is carried forward,
105          * it is also necessary to carry forward the DQ_DIRTY flag.
106          */
107         if(otp->t_flags & XFS_TRANS_DQ_DIRTY)
108                 ntp->t_flags |= XFS_TRANS_DQ_DIRTY;
109
110         for (j = 0; j < XFS_QM_TRANS_DQTYPES; j++) {
111                 oqa = otp->t_dqinfo->dqs[j];
112                 nqa = ntp->t_dqinfo->dqs[j];
113                 for (i = 0; i < XFS_QM_TRANS_MAXDQS; i++) {
114                         if (oqa[i].qt_dquot == NULL)
115                                 break;
116                         oq = &oqa[i];
117                         nq = &nqa[i];
118
119                         nq->qt_dquot = oq->qt_dquot;
120                         nq->qt_bcount_delta = nq->qt_icount_delta = 0;
121                         nq->qt_rtbcount_delta = 0;
122
123                         /*
124                          * Transfer whatever is left of the reservations.
125                          */
126                         nq->qt_blk_res = oq->qt_blk_res - oq->qt_blk_res_used;
127                         oq->qt_blk_res = oq->qt_blk_res_used;
128
129                         nq->qt_rtblk_res = oq->qt_rtblk_res -
130                                 oq->qt_rtblk_res_used;
131                         oq->qt_rtblk_res = oq->qt_rtblk_res_used;
132
133                         nq->qt_ino_res = oq->qt_ino_res - oq->qt_ino_res_used;
134                         oq->qt_ino_res = oq->qt_ino_res_used;
135
136                 }
137         }
138 }
139
140 /*
141  * Wrap around mod_dquot to account for both user and group quotas.
142  */
143 void
144 xfs_trans_mod_dquot_byino(
145         xfs_trans_t     *tp,
146         xfs_inode_t     *ip,
147         uint            field,
148         long            delta)
149 {
150         xfs_mount_t     *mp = tp->t_mountp;
151
152         if (!XFS_IS_QUOTA_RUNNING(mp) ||
153             !XFS_IS_QUOTA_ON(mp) ||
154             xfs_is_quota_inode(&mp->m_sb, ip->i_ino))
155                 return;
156
157         if (tp->t_dqinfo == NULL)
158                 xfs_trans_alloc_dqinfo(tp);
159
160         if (XFS_IS_UQUOTA_ON(mp) && ip->i_udquot)
161                 (void) xfs_trans_mod_dquot(tp, ip->i_udquot, field, delta);
162         if (XFS_IS_GQUOTA_ON(mp) && ip->i_gdquot)
163                 (void) xfs_trans_mod_dquot(tp, ip->i_gdquot, field, delta);
164         if (XFS_IS_PQUOTA_ON(mp) && ip->i_pdquot)
165                 (void) xfs_trans_mod_dquot(tp, ip->i_pdquot, field, delta);
166 }
167
168 STATIC struct xfs_dqtrx *
169 xfs_trans_get_dqtrx(
170         struct xfs_trans        *tp,
171         struct xfs_dquot        *dqp)
172 {
173         int                     i;
174         struct xfs_dqtrx        *qa;
175
176         if (XFS_QM_ISUDQ(dqp))
177                 qa = tp->t_dqinfo->dqs[XFS_QM_TRANS_USR];
178         else if (XFS_QM_ISGDQ(dqp))
179                 qa = tp->t_dqinfo->dqs[XFS_QM_TRANS_GRP];
180         else if (XFS_QM_ISPDQ(dqp))
181                 qa = tp->t_dqinfo->dqs[XFS_QM_TRANS_PRJ];
182         else
183                 return NULL;
184
185         for (i = 0; i < XFS_QM_TRANS_MAXDQS; i++) {
186                 if (qa[i].qt_dquot == NULL ||
187                     qa[i].qt_dquot == dqp)
188                         return &qa[i];
189         }
190
191         return NULL;
192 }
193
194 /*
195  * Make the changes in the transaction structure.
196  * The moral equivalent to xfs_trans_mod_sb().
197  * We don't touch any fields in the dquot, so we don't care
198  * if it's locked or not (most of the time it won't be).
199  */
200 void
201 xfs_trans_mod_dquot(
202         xfs_trans_t     *tp,
203         xfs_dquot_t     *dqp,
204         uint            field,
205         long            delta)
206 {
207         xfs_dqtrx_t     *qtrx;
208
209         ASSERT(tp);
210         ASSERT(XFS_IS_QUOTA_RUNNING(tp->t_mountp));
211         qtrx = NULL;
212
213         if (tp->t_dqinfo == NULL)
214                 xfs_trans_alloc_dqinfo(tp);
215         /*
216          * Find either the first free slot or the slot that belongs
217          * to this dquot.
218          */
219         qtrx = xfs_trans_get_dqtrx(tp, dqp);
220         ASSERT(qtrx);
221         if (qtrx->qt_dquot == NULL)
222                 qtrx->qt_dquot = dqp;
223
224         switch (field) {
225
226                 /*
227                  * regular disk blk reservation
228                  */
229               case XFS_TRANS_DQ_RES_BLKS:
230                 qtrx->qt_blk_res += (ulong)delta;
231                 break;
232
233                 /*
234                  * inode reservation
235                  */
236               case XFS_TRANS_DQ_RES_INOS:
237                 qtrx->qt_ino_res += (ulong)delta;
238                 break;
239
240                 /*
241                  * disk blocks used.
242                  */
243               case XFS_TRANS_DQ_BCOUNT:
244                 if (qtrx->qt_blk_res && delta > 0) {
245                         qtrx->qt_blk_res_used += (ulong)delta;
246                         ASSERT(qtrx->qt_blk_res >= qtrx->qt_blk_res_used);
247                 }
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  */
301 STATIC void
302 xfs_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  */
327 void
328 xfs_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                                 if (qtrx->qt_blk_res != qtrx->qt_blk_res_used) {
429                                         if (qtrx->qt_blk_res >
430                                             qtrx->qt_blk_res_used)
431                                                 dqp->q_res_bcount -= (xfs_qcnt_t)
432                                                         (qtrx->qt_blk_res -
433                                                          qtrx->qt_blk_res_used);
434                                         else
435                                                 dqp->q_res_bcount -= (xfs_qcnt_t)
436                                                         (qtrx->qt_blk_res_used -
437                                                          qtrx->qt_blk_res);
438                                 }
439                         } else {
440                                 /*
441                                  * These blks were never reserved, either inside
442                                  * a transaction or outside one (in a delayed
443                                  * allocation). Also, this isn't always a
444                                  * negative number since we sometimes
445                                  * deliberately skip quota reservations.
446                                  */
447                                 if (qtrx->qt_bcount_delta) {
448                                         dqp->q_res_bcount +=
449                                               (xfs_qcnt_t)qtrx->qt_bcount_delta;
450                                 }
451                         }
452                         /*
453                          * Adjust the RT reservation.
454                          */
455                         if (qtrx->qt_rtblk_res != 0) {
456                                 if (qtrx->qt_rtblk_res != qtrx->qt_rtblk_res_used) {
457                                         if (qtrx->qt_rtblk_res >
458                                             qtrx->qt_rtblk_res_used)
459                                                dqp->q_res_rtbcount -= (xfs_qcnt_t)
460                                                        (qtrx->qt_rtblk_res -
461                                                         qtrx->qt_rtblk_res_used);
462                                         else
463                                                dqp->q_res_rtbcount -= (xfs_qcnt_t)
464                                                        (qtrx->qt_rtblk_res_used -
465                                                         qtrx->qt_rtblk_res);
466                                 }
467                         } else {
468                                 if (qtrx->qt_rtbcount_delta)
469                                         dqp->q_res_rtbcount +=
470                                             (xfs_qcnt_t)qtrx->qt_rtbcount_delta;
471                         }
472
473                         /*
474                          * Adjust the inode reservation.
475                          */
476                         if (qtrx->qt_ino_res != 0) {
477                                 ASSERT(qtrx->qt_ino_res >=
478                                        qtrx->qt_ino_res_used);
479                                 if (qtrx->qt_ino_res > qtrx->qt_ino_res_used)
480                                         dqp->q_res_icount -= (xfs_qcnt_t)
481                                                 (qtrx->qt_ino_res -
482                                                  qtrx->qt_ino_res_used);
483                         } else {
484                                 if (qtrx->qt_icount_delta)
485                                         dqp->q_res_icount +=
486                                             (xfs_qcnt_t)qtrx->qt_icount_delta;
487                         }
488
489                         ASSERT(dqp->q_res_bcount >=
490                                 be64_to_cpu(dqp->q_core.d_bcount));
491                         ASSERT(dqp->q_res_icount >=
492                                 be64_to_cpu(dqp->q_core.d_icount));
493                         ASSERT(dqp->q_res_rtbcount >=
494                                 be64_to_cpu(dqp->q_core.d_rtbcount));
495                 }
496         }
497 }
498
499 /*
500  * Release the reservations, and adjust the dquots accordingly.
501  * This is called only when the transaction is being aborted. If by
502  * any chance we have done dquot modifications incore (ie. deltas) already,
503  * we simply throw those away, since that's the expected behavior
504  * when a transaction is curtailed without a commit.
505  */
506 void
507 xfs_trans_unreserve_and_mod_dquots(
508         xfs_trans_t             *tp)
509 {
510         int                     i, j;
511         xfs_dquot_t             *dqp;
512         xfs_dqtrx_t             *qtrx, *qa;
513         bool                    locked;
514
515         if (!tp->t_dqinfo || !(tp->t_flags & XFS_TRANS_DQ_DIRTY))
516                 return;
517
518         for (j = 0; j < XFS_QM_TRANS_DQTYPES; j++) {
519                 qa = tp->t_dqinfo->dqs[j];
520
521                 for (i = 0; i < XFS_QM_TRANS_MAXDQS; i++) {
522                         qtrx = &qa[i];
523                         /*
524                          * We assume that the array of dquots is filled
525                          * sequentially, not sparsely.
526                          */
527                         if ((dqp = qtrx->qt_dquot) == NULL)
528                                 break;
529                         /*
530                          * Unreserve the original reservation. We don't care
531                          * about the number of blocks used field, or deltas.
532                          * Also we don't bother to zero the fields.
533                          */
534                         locked = false;
535                         if (qtrx->qt_blk_res) {
536                                 xfs_dqlock(dqp);
537                                 locked = true;
538                                 dqp->q_res_bcount -=
539                                         (xfs_qcnt_t)qtrx->qt_blk_res;
540                         }
541                         if (qtrx->qt_ino_res) {
542                                 if (!locked) {
543                                         xfs_dqlock(dqp);
544                                         locked = true;
545                                 }
546                                 dqp->q_res_icount -=
547                                         (xfs_qcnt_t)qtrx->qt_ino_res;
548                         }
549
550                         if (qtrx->qt_rtblk_res) {
551                                 if (!locked) {
552                                         xfs_dqlock(dqp);
553                                         locked = true;
554                                 }
555                                 dqp->q_res_rtbcount -=
556                                         (xfs_qcnt_t)qtrx->qt_rtblk_res;
557                         }
558                         if (locked)
559                                 xfs_dqunlock(dqp);
560
561                 }
562         }
563 }
564
565 STATIC void
566 xfs_quota_warn(
567         struct xfs_mount        *mp,
568         struct xfs_dquot        *dqp,
569         int                     type)
570 {
571         /* no warnings for project quotas - we just return ENOSPC later */
572         if (dqp->dq_flags & XFS_DQ_PROJ)
573                 return;
574         quota_send_warning(make_kqid(&init_user_ns,
575                                      (dqp->dq_flags & XFS_DQ_USER) ?
576                                      USRQUOTA : GRPQUOTA,
577                                      be32_to_cpu(dqp->q_core.d_id)),
578                            mp->m_super->s_dev, type);
579 }
580
581 /*
582  * This reserves disk blocks and inodes against a dquot.
583  * Flags indicate if the dquot is to be locked here and also
584  * if the blk reservation is for RT or regular blocks.
585  * Sending in XFS_QMOPT_FORCE_RES flag skips the quota check.
586  */
587 STATIC int
588 xfs_trans_dqresv(
589         xfs_trans_t     *tp,
590         xfs_mount_t     *mp,
591         xfs_dquot_t     *dqp,
592         long            nblks,
593         long            ninos,
594         uint            flags)
595 {
596         xfs_qcnt_t      hardlimit;
597         xfs_qcnt_t      softlimit;
598         time_t          timer;
599         xfs_qwarncnt_t  warns;
600         xfs_qwarncnt_t  warnlimit;
601         xfs_qcnt_t      total_count;
602         xfs_qcnt_t      *resbcountp;
603         xfs_quotainfo_t *q = mp->m_quotainfo;
604
605
606         xfs_dqlock(dqp);
607
608         if (flags & XFS_TRANS_DQ_RES_BLKS) {
609                 hardlimit = be64_to_cpu(dqp->q_core.d_blk_hardlimit);
610                 if (!hardlimit)
611                         hardlimit = q->qi_bhardlimit;
612                 softlimit = be64_to_cpu(dqp->q_core.d_blk_softlimit);
613                 if (!softlimit)
614                         softlimit = q->qi_bsoftlimit;
615                 timer = be32_to_cpu(dqp->q_core.d_btimer);
616                 warns = be16_to_cpu(dqp->q_core.d_bwarns);
617                 warnlimit = dqp->q_mount->m_quotainfo->qi_bwarnlimit;
618                 resbcountp = &dqp->q_res_bcount;
619         } else {
620                 ASSERT(flags & XFS_TRANS_DQ_RES_RTBLKS);
621                 hardlimit = be64_to_cpu(dqp->q_core.d_rtb_hardlimit);
622                 if (!hardlimit)
623                         hardlimit = q->qi_rtbhardlimit;
624                 softlimit = be64_to_cpu(dqp->q_core.d_rtb_softlimit);
625                 if (!softlimit)
626                         softlimit = q->qi_rtbsoftlimit;
627                 timer = be32_to_cpu(dqp->q_core.d_rtbtimer);
628                 warns = be16_to_cpu(dqp->q_core.d_rtbwarns);
629                 warnlimit = dqp->q_mount->m_quotainfo->qi_rtbwarnlimit;
630                 resbcountp = &dqp->q_res_rtbcount;
631         }
632
633         if ((flags & XFS_QMOPT_FORCE_RES) == 0 &&
634             dqp->q_core.d_id &&
635             ((XFS_IS_UQUOTA_ENFORCED(dqp->q_mount) && XFS_QM_ISUDQ(dqp)) ||
636              (XFS_IS_GQUOTA_ENFORCED(dqp->q_mount) && XFS_QM_ISGDQ(dqp)) ||
637              (XFS_IS_PQUOTA_ENFORCED(dqp->q_mount) && XFS_QM_ISPDQ(dqp)))) {
638                 if (nblks > 0) {
639                         /*
640                          * dquot is locked already. See if we'd go over the
641                          * hardlimit or exceed the timelimit if we allocate
642                          * nblks.
643                          */
644                         total_count = *resbcountp + nblks;
645                         if (hardlimit && total_count > hardlimit) {
646                                 xfs_quota_warn(mp, dqp, QUOTA_NL_BHARDWARN);
647                                 goto error_return;
648                         }
649                         if (softlimit && total_count > softlimit) {
650                                 if ((timer != 0 && get_seconds() > timer) ||
651                                     (warns != 0 && warns >= warnlimit)) {
652                                         xfs_quota_warn(mp, dqp,
653                                                        QUOTA_NL_BSOFTLONGWARN);
654                                         goto error_return;
655                                 }
656
657                                 xfs_quota_warn(mp, dqp, QUOTA_NL_BSOFTWARN);
658                         }
659                 }
660                 if (ninos > 0) {
661                         total_count = be64_to_cpu(dqp->q_core.d_icount) + ninos;
662                         timer = be32_to_cpu(dqp->q_core.d_itimer);
663                         warns = be16_to_cpu(dqp->q_core.d_iwarns);
664                         warnlimit = dqp->q_mount->m_quotainfo->qi_iwarnlimit;
665                         hardlimit = be64_to_cpu(dqp->q_core.d_ino_hardlimit);
666                         if (!hardlimit)
667                                 hardlimit = q->qi_ihardlimit;
668                         softlimit = be64_to_cpu(dqp->q_core.d_ino_softlimit);
669                         if (!softlimit)
670                                 softlimit = q->qi_isoftlimit;
671
672                         if (hardlimit && total_count > hardlimit) {
673                                 xfs_quota_warn(mp, dqp, QUOTA_NL_IHARDWARN);
674                                 goto error_return;
675                         }
676                         if (softlimit && total_count > softlimit) {
677                                 if  ((timer != 0 && get_seconds() > timer) ||
678                                      (warns != 0 && warns >= warnlimit)) {
679                                         xfs_quota_warn(mp, dqp,
680                                                        QUOTA_NL_ISOFTLONGWARN);
681                                         goto error_return;
682                                 }
683                                 xfs_quota_warn(mp, dqp, QUOTA_NL_ISOFTWARN);
684                         }
685                 }
686         }
687
688         /*
689          * Change the reservation, but not the actual usage.
690          * Note that q_res_bcount = q_core.d_bcount + resv
691          */
692         (*resbcountp) += (xfs_qcnt_t)nblks;
693         if (ninos != 0)
694                 dqp->q_res_icount += (xfs_qcnt_t)ninos;
695
696         /*
697          * note the reservation amt in the trans struct too,
698          * so that the transaction knows how much was reserved by
699          * it against this particular dquot.
700          * We don't do this when we are reserving for a delayed allocation,
701          * because we don't have the luxury of a transaction envelope then.
702          */
703         if (tp) {
704                 ASSERT(tp->t_dqinfo);
705                 ASSERT(flags & XFS_QMOPT_RESBLK_MASK);
706                 if (nblks != 0)
707                         xfs_trans_mod_dquot(tp, dqp,
708                                             flags & XFS_QMOPT_RESBLK_MASK,
709                                             nblks);
710                 if (ninos != 0)
711                         xfs_trans_mod_dquot(tp, dqp,
712                                             XFS_TRANS_DQ_RES_INOS,
713                                             ninos);
714         }
715         ASSERT(dqp->q_res_bcount >= be64_to_cpu(dqp->q_core.d_bcount));
716         ASSERT(dqp->q_res_rtbcount >= be64_to_cpu(dqp->q_core.d_rtbcount));
717         ASSERT(dqp->q_res_icount >= be64_to_cpu(dqp->q_core.d_icount));
718
719         xfs_dqunlock(dqp);
720         return 0;
721
722 error_return:
723         xfs_dqunlock(dqp);
724         if (flags & XFS_QMOPT_ENOSPC)
725                 return -ENOSPC;
726         return -EDQUOT;
727 }
728
729
730 /*
731  * Given dquot(s), make disk block and/or inode reservations against them.
732  * The fact that this does the reservation against user, group and
733  * project quotas is important, because this follows a all-or-nothing
734  * approach.
735  *
736  * flags = XFS_QMOPT_FORCE_RES evades limit enforcement. Used by chown.
737  *         XFS_QMOPT_ENOSPC returns ENOSPC not EDQUOT.  Used by pquota.
738  *         XFS_TRANS_DQ_RES_BLKS reserves regular disk blocks
739  *         XFS_TRANS_DQ_RES_RTBLKS reserves realtime disk blocks
740  * dquots are unlocked on return, if they were not locked by caller.
741  */
742 int
743 xfs_trans_reserve_quota_bydquots(
744         struct xfs_trans        *tp,
745         struct xfs_mount        *mp,
746         struct xfs_dquot        *udqp,
747         struct xfs_dquot        *gdqp,
748         struct xfs_dquot        *pdqp,
749         long                    nblks,
750         long                    ninos,
751         uint                    flags)
752 {
753         int             error;
754
755         if (!XFS_IS_QUOTA_RUNNING(mp) || !XFS_IS_QUOTA_ON(mp))
756                 return 0;
757
758         if (tp && tp->t_dqinfo == NULL)
759                 xfs_trans_alloc_dqinfo(tp);
760
761         ASSERT(flags & XFS_QMOPT_RESBLK_MASK);
762
763         if (udqp) {
764                 error = xfs_trans_dqresv(tp, mp, udqp, nblks, ninos,
765                                         (flags & ~XFS_QMOPT_ENOSPC));
766                 if (error)
767                         return error;
768         }
769
770         if (gdqp) {
771                 error = xfs_trans_dqresv(tp, mp, gdqp, nblks, ninos, flags);
772                 if (error)
773                         goto unwind_usr;
774         }
775
776         if (pdqp) {
777                 error = xfs_trans_dqresv(tp, mp, pdqp, nblks, ninos, flags);
778                 if (error)
779                         goto unwind_grp;
780         }
781
782         /*
783          * Didn't change anything critical, so, no need to log
784          */
785         return 0;
786
787 unwind_grp:
788         flags |= XFS_QMOPT_FORCE_RES;
789         if (gdqp)
790                 xfs_trans_dqresv(tp, mp, gdqp, -nblks, -ninos, flags);
791 unwind_usr:
792         flags |= XFS_QMOPT_FORCE_RES;
793         if (udqp)
794                 xfs_trans_dqresv(tp, mp, udqp, -nblks, -ninos, flags);
795         return error;
796 }
797
798
799 /*
800  * Lock the dquot and change the reservation if we can.
801  * This doesn't change the actual usage, just the reservation.
802  * The inode sent in is locked.
803  */
804 int
805 xfs_trans_reserve_quota_nblks(
806         struct xfs_trans        *tp,
807         struct xfs_inode        *ip,
808         long                    nblks,
809         long                    ninos,
810         uint                    flags)
811 {
812         struct xfs_mount        *mp = ip->i_mount;
813
814         if (!XFS_IS_QUOTA_RUNNING(mp) || !XFS_IS_QUOTA_ON(mp))
815                 return 0;
816         if (XFS_IS_PQUOTA_ON(mp))
817                 flags |= XFS_QMOPT_ENOSPC;
818
819         ASSERT(!xfs_is_quota_inode(&mp->m_sb, ip->i_ino));
820
821         ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL));
822         ASSERT((flags & ~(XFS_QMOPT_FORCE_RES | XFS_QMOPT_ENOSPC)) ==
823                                 XFS_TRANS_DQ_RES_RTBLKS ||
824                (flags & ~(XFS_QMOPT_FORCE_RES | XFS_QMOPT_ENOSPC)) ==
825                                 XFS_TRANS_DQ_RES_BLKS);
826
827         /*
828          * Reserve nblks against these dquots, with trans as the mediator.
829          */
830         return xfs_trans_reserve_quota_bydquots(tp, mp,
831                                                 ip->i_udquot, ip->i_gdquot,
832                                                 ip->i_pdquot,
833                                                 nblks, ninos, flags);
834 }
835
836 /*
837  * This routine is called to allocate a quotaoff log item.
838  */
839 xfs_qoff_logitem_t *
840 xfs_trans_get_qoff_item(
841         xfs_trans_t             *tp,
842         xfs_qoff_logitem_t      *startqoff,
843         uint                    flags)
844 {
845         xfs_qoff_logitem_t      *q;
846
847         ASSERT(tp != NULL);
848
849         q = xfs_qm_qoff_logitem_init(tp->t_mountp, startqoff, flags);
850         ASSERT(q != NULL);
851
852         /*
853          * Get a log_item_desc to point at the new item.
854          */
855         xfs_trans_add_item(tp, &q->qql_item);
856         return q;
857 }
858
859
860 /*
861  * This is called to mark the quotaoff logitem as needing
862  * to be logged when the transaction is committed.  The logitem must
863  * already be associated with the given transaction.
864  */
865 void
866 xfs_trans_log_quotaoff_item(
867         xfs_trans_t             *tp,
868         xfs_qoff_logitem_t      *qlp)
869 {
870         tp->t_flags |= XFS_TRANS_DIRTY;
871         qlp->qql_item.li_desc->lid_flags |= XFS_LID_DIRTY;
872 }
873
874 STATIC void
875 xfs_trans_alloc_dqinfo(
876         xfs_trans_t     *tp)
877 {
878         tp->t_dqinfo = kmem_zone_zalloc(xfs_qm_dqtrxzone, KM_SLEEP);
879 }
880
881 void
882 xfs_trans_free_dqinfo(
883         xfs_trans_t     *tp)
884 {
885         if (!tp->t_dqinfo)
886                 return;
887         kmem_zone_free(xfs_qm_dqtrxzone, tp->t_dqinfo);
888         tp->t_dqinfo = NULL;
889 }