lustre/quota/quota_master.c

   1 /* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
   2  * vim:expandtab:shiftwidth=8:tabstop=8:
   3  *
   4  * GPL HEADER START
   5  *
   6  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   7  *
   8  * This program is free software; you can redistribute it and/or modify
   9  * it under the terms of the GNU General Public License version 2 only,
  10  * as published by the Free Software Foundation.
  11  *
  12  * This program is distributed in the hope that it will be useful, but
  13  * WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  15  * General Public License version 2 for more details (a copy is included
  16  * in the LICENSE file that accompanied this code).
  17  *
  18  * You should have received a copy of the GNU General Public License
  19  * version 2 along with this program; If not, see
  20  * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
  21  *
  22  * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
  23  * CA 95054 USA or visit www.sun.com if you need additional information or
  24  * have any questions.
  25  *
  26  * GPL HEADER END
  27  */
  28 /*
  29  * Copyright  2008 Sun Microsystems, Inc. All rights reserved
  30  * Use is subject to license terms.
  31  */
  32 /*
  33  * This file is part of Lustre, http://www.lustre.org/
  34  * Lustre is a trademark of Sun Microsystems, Inc.
  35  *
  36  * lustre/quota/quota_master.c
  37  *
  38  * Lustre Quota Master request handler
  39  *
  40  * Author: Niu YaWei <niu@clusterfs.com>
  41  */
  42
  43 #ifndef EXPORT_SYMTAB
  44 # define EXPORT_SYMTAB
  45 #endif
  46
  47 #define DEBUG_SUBSYSTEM S_LQUOTA
  48
  49 #include <linux/version.h>
  50 #include <linux/fs.h>
  51 #include <asm/unistd.h>
  52 #include <linux/slab.h>
  53 #include <linux/quotaops.h>
  54 #include <linux/module.h>
  55 #include <linux/init.h>
  56 #include <linux/quota.h>
  57
  58 #include <obd_class.h>
  59 #include <lustre_quota.h>
  60 #include <lustre_fsfilt.h>
  61 #include <lustre_mds.h>
  62
  63 #include "quota_internal.h"
  64
  65 #ifdef HAVE_QUOTA_SUPPORT
  66
  67 /* lock ordering: mds->mds_qonoff_sem > dquot->dq_sem */
  68 static struct list_head lustre_dquot_hash[NR_DQHASH];
  69 static spinlock_t dquot_hash_lock = SPIN_LOCK_UNLOCKED;
  70
  71 cfs_mem_cache_t *lustre_dquot_cachep;
  72
  73 int lustre_dquot_init(void)
  74 {
  75         int i;
  76         ENTRY;
  77
  78         LASSERT(lustre_dquot_cachep == NULL);
  79         lustre_dquot_cachep = cfs_mem_cache_create("lustre_dquot_cache",
  80                                                    sizeof(struct lustre_dquot),
  81                                                    0, 0);
  82         if (!lustre_dquot_cachep)
  83                 return (-ENOMEM);
  84
  85         for (i = 0; i < NR_DQHASH; i++) {
  86                 CFS_INIT_LIST_HEAD(lustre_dquot_hash + i);
  87         }
  88         RETURN(0);
  89 }
  90
  91 void lustre_dquot_exit(void)
  92 {
  93         int i;
  94         ENTRY;
  95         /* FIXME cleanup work ?? */
  96
  97         for (i = 0; i < NR_DQHASH; i++) {
  98                 LASSERT(list_empty(lustre_dquot_hash + i));
  99         }
 100         if (lustre_dquot_cachep) {
 101                 int rc;
 102                 rc = cfs_mem_cache_destroy(lustre_dquot_cachep);
 103                 LASSERTF(rc == 0,"couldn't destroy lustre_dquot_cachep slab\n");
 104                 lustre_dquot_cachep = NULL;
 105         }
 106         EXIT;
 107 }
 108
 109 static inline int
 110 dquot_hashfn(struct lustre_quota_info *info, unsigned int id, int type)
 111              __attribute__((__const__));
 112
 113 static inline int
 114 dquot_hashfn(struct lustre_quota_info *info, unsigned int id, int type)
 115 {
 116         unsigned long tmp = ((unsigned long)info >> L1_CACHE_SHIFT) ^ id;
 117         tmp = (tmp * (MAXQUOTAS - type)) % NR_DQHASH;
 118         return tmp;
 119 }
 120
 121 /* caller must hold dquot_hash_lock */
 122 static struct lustre_dquot *find_dquot(int hashent,
 123                                        struct lustre_quota_info *lqi, qid_t id,
 124                                        int type)
 125 {
 126         struct lustre_dquot *dquot;
 127         ENTRY;
 128
 129         LASSERT_SPIN_LOCKED(&dquot_hash_lock);
 130         list_for_each_entry(dquot, &lustre_dquot_hash[hashent], dq_hash) {
 131                 if (dquot->dq_info == lqi &&
 132                     dquot->dq_id == id && dquot->dq_type == type)
 133                         RETURN(dquot);
 134         }
 135         RETURN(NULL);
 136 }
 137
 138 static struct lustre_dquot *alloc_dquot(struct lustre_quota_info *lqi,
 139                                         qid_t id, int type)
 140 {
 141         struct lustre_dquot *dquot = NULL;
 142         ENTRY;
 143
 144         OBD_SLAB_ALLOC_PTR_GFP(dquot, lustre_dquot_cachep, CFS_ALLOC_IO);
 145         if (dquot == NULL)
 146                 RETURN(NULL);
 147
 148         CFS_INIT_LIST_HEAD(&dquot->dq_hash);
 149         init_mutex_locked(&dquot->dq_sem);
 150         dquot->dq_refcnt = 1;
 151         dquot->dq_info = lqi;
 152         dquot->dq_id = id;
 153         dquot->dq_type = type;
 154         dquot->dq_status = DQ_STATUS_AVAIL;
 155
 156         RETURN(dquot);
 157 }
 158
 159 static void free_dquot(struct lustre_dquot *dquot)
 160 {
 161         OBD_SLAB_FREE(dquot, lustre_dquot_cachep, sizeof(*dquot));
 162 }
 163
 164 static void insert_dquot_nolock(struct lustre_dquot *dquot)
 165 {
 166         struct list_head *head = lustre_dquot_hash +
 167             dquot_hashfn(dquot->dq_info, dquot->dq_id, dquot->dq_type);
 168         LASSERT(list_empty(&dquot->dq_hash));
 169         list_add(&dquot->dq_hash, head);
 170 }
 171
 172 static void remove_dquot_nolock(struct lustre_dquot *dquot)
 173 {
 174         LASSERT(!list_empty(&dquot->dq_hash));
 175         list_del_init(&dquot->dq_hash);
 176 }
 177
 178 static void lustre_dqput(struct lustre_dquot *dquot)
 179 {
 180         ENTRY;
 181         spin_lock(&dquot_hash_lock);
 182         LASSERT(dquot->dq_refcnt);
 183         dquot->dq_refcnt--;
 184         if (!dquot->dq_refcnt) {
 185                 remove_dquot_nolock(dquot);
 186                 free_dquot(dquot);
 187         }
 188         spin_unlock(&dquot_hash_lock);
 189         EXIT;
 190 }
 191
 192 static struct lustre_dquot *lustre_dqget(struct obd_device *obd,
 193                                          struct lustre_quota_info *lqi,
 194                                          qid_t id, int type)
 195 {
 196         unsigned int hashent = dquot_hashfn(lqi, id, type);
 197         struct lustre_dquot *dquot, *empty;
 198         ENTRY;
 199
 200         if ((empty = alloc_dquot(lqi, id, type)) == NULL)
 201                 RETURN(ERR_PTR(-ENOMEM));
 202
 203         spin_lock(&dquot_hash_lock);
 204         if ((dquot = find_dquot(hashent, lqi, id, type)) != NULL) {
 205                 dquot->dq_refcnt++;
 206                 spin_unlock(&dquot_hash_lock);
 207                 free_dquot(empty);
 208         } else {
 209                 int rc;
 210
 211                 dquot = empty;
 212                 insert_dquot_nolock(dquot);
 213                 spin_unlock(&dquot_hash_lock);
 214
 215                 rc = fsfilt_dquot(obd, dquot, QFILE_RD_DQUOT);
 216                 up(&dquot->dq_sem);
 217                 if (rc) {
 218                         CERROR("can't read dquot from admin quotafile! "
 219                                "(rc:%d)\n", rc);
 220                         lustre_dqput(dquot);
 221                         RETURN(ERR_PTR(rc));
 222                 }
 223
 224         }
 225
 226         LASSERT(dquot);
 227         RETURN(dquot);
 228 }
 229
 230 static void init_oqaq(struct quota_adjust_qunit *oqaq,
 231                       struct lustre_quota_ctxt *qctxt,
 232                       qid_t id, int type)
 233 {
 234         struct lustre_qunit_size *lqs = NULL;
 235
 236         oqaq->qaq_id = id;
 237         oqaq->qaq_flags = type;
 238         lqs = quota_search_lqs(LQS_KEY(type, id), qctxt, 0);
 239         if (lqs && !IS_ERR(lqs)) {
 240                 spin_lock(&lqs->lqs_lock);
 241                 oqaq->qaq_bunit_sz = lqs->lqs_bunit_sz;
 242                 oqaq->qaq_iunit_sz = lqs->lqs_iunit_sz;
 243                 oqaq->qaq_flags    = lqs->lqs_flags;
 244                 spin_unlock(&lqs->lqs_lock);
 245                 lqs_putref(lqs);
 246         } else {
 247                 CDEBUG(D_QUOTA, "Can't find the lustre qunit size!\n");
 248                 oqaq->qaq_bunit_sz = qctxt->lqc_bunit_sz;
 249                 oqaq->qaq_iunit_sz = qctxt->lqc_iunit_sz;
 250         }
 251 }
 252
 253 int dqacq_adjust_qunit_sz(struct obd_device *obd, qid_t id, int type,
 254                           __u32 is_blk)
 255 {
 256         struct mds_obd *mds = &obd->u.mds;
 257         struct lustre_quota_ctxt *qctxt = &mds->mds_obt.obt_qctxt;
 258         struct obd_device *lov_mds_obd = class_exp2obd(mds->mds_osc_exp);
 259         struct lov_obd *lov = &lov_mds_obd->u.lov;
 260         __u32 ost_num = lov->desc.ld_tgt_count, mdt_num = 1;
 261         struct quota_adjust_qunit *oqaq = NULL;
 262         unsigned int qid[MAXQUOTAS] = { 0, 0 };
 263         struct lustre_quota_info *info = &mds->mds_quota_info;
 264         struct lustre_dquot *dquot = NULL;
 265         int adjust_res = 0;
 266         int rc = 0;
 267         ENTRY;
 268
 269         LASSERT(mds);
 270         dquot = lustre_dqget(obd, info, id, type);
 271         if (IS_ERR(dquot))
 272                 RETURN(PTR_ERR(dquot));
 273
 274         OBD_ALLOC_PTR(oqaq);
 275         if (!oqaq)
 276                 GOTO(out, rc = -ENOMEM);
 277
 278         down(&dquot->dq_sem);
 279         init_oqaq(oqaq, qctxt, id, type);
 280
 281         rc = dquot_create_oqaq(qctxt, dquot, ost_num, mdt_num,
 282                                is_blk ? LQUOTA_FLAGS_ADJBLK :
 283                                LQUOTA_FLAGS_ADJINO, oqaq);
 284
 285         if (rc < 0) {
 286                 CDEBUG(D_ERROR, "create oqaq failed! (rc:%d)\n", rc);
 287                 GOTO(out_sem, rc);
 288         }
 289         QAQ_DEBUG(oqaq, "show oqaq.\n")
 290
 291         if (!QAQ_IS_ADJBLK(oqaq) && !QAQ_IS_ADJINO(oqaq))
 292                 GOTO(out_sem, rc);
 293
 294         /* adjust the mds slave qunit size */
 295         adjust_res = quota_adjust_slave_lqs(oqaq, qctxt);
 296         if (adjust_res <= 0) {
 297                 if (adjust_res < 0) {
 298                         rc = adjust_res;
 299                         CDEBUG(D_ERROR, "adjust mds slave's qunit size failed! \
 300                                (rc:%d)\n", rc);
 301                 } else {
 302                         CDEBUG(D_QUOTA, "qunit doesn't need to be adjusted.\n");
 303                 }
 304                 GOTO(out_sem, rc);
 305         }
 306
 307         if (type)
 308                 qid[GRPQUOTA] = dquot->dq_id;
 309         else
 310                 qid[USRQUOTA] = dquot->dq_id;
 311
 312         up(&dquot->dq_sem);
 313
 314         rc = qctxt_adjust_qunit(obd, qctxt, qid, is_blk, 0, NULL);
 315         if (rc == -EDQUOT || rc == -EBUSY) {
 316                 CDEBUG(D_QUOTA, "rc: %d.\n", rc);
 317                 rc = 0;
 318         }
 319         if (rc) {
 320                 CDEBUG(D_ERROR, "mds fail to adjust file quota! \
 321                                (rc:%d)\n", rc);
 322                 GOTO(out, rc);
 323         }
 324
 325         /* only when block qunit is reduced, boardcast to osts */
 326         if ((adjust_res & LQS_BLK_DECREASE) && QAQ_IS_ADJBLK(oqaq))
 327                 rc = obd_quota_adjust_qunit(mds->mds_osc_exp, oqaq, qctxt);
 328
 329 out:
 330         lustre_dqput(dquot);
 331         if (oqaq)
 332                 OBD_FREE_PTR(oqaq);
 333
 334         RETURN(rc);
 335 out_sem:
 336         up(&dquot->dq_sem);
 337         goto out;
 338 }
 339
 340 int dqacq_handler(struct obd_device *obd, struct qunit_data *qdata, int opc)
 341 {
 342         struct mds_obd *mds = &obd->u.mds;
 343         struct lustre_quota_ctxt *qctxt = &mds->mds_obt.obt_qctxt;
 344         struct lustre_quota_info *info = &mds->mds_quota_info;
 345         struct lustre_dquot *dquot = NULL;
 346         __u64 *usage = NULL;
 347         __u64 hlimit = 0, slimit = 0;
 348         time_t *time = NULL;
 349         unsigned int grace = 0;
 350         struct lustre_qunit_size *lqs = NULL;
 351         int rc = 0;
 352         ENTRY;
 353
 354         if (OBD_FAIL_CHECK(OBD_FAIL_OBD_DQACQ))
 355                 RETURN(-EIO);
 356
 357         dquot = lustre_dqget(obd, info, qdata->qd_id, QDATA_IS_GRP(qdata));
 358         if (IS_ERR(dquot))
 359                 RETURN(PTR_ERR(dquot));
 360
 361         DQUOT_DEBUG(dquot, "get dquot in dqacq_handler\n");
 362         QINFO_DEBUG(dquot->dq_info, "get dquot in dqadq_handler\n");
 363
 364         down(&mds->mds_qonoff_sem);
 365         down(&dquot->dq_sem);
 366
 367         if (dquot->dq_status & DQ_STATUS_RECOVERY) {
 368                 DQUOT_DEBUG(dquot, "this dquot is under recovering.\n");
 369                 GOTO(out, rc = -EBUSY);
 370         }
 371
 372         if (QDATA_IS_BLK(qdata)) {
 373                 grace = info->qi_info[QDATA_IS_GRP(qdata)].dqi_bgrace;
 374                 usage = &dquot->dq_dqb.dqb_curspace;
 375                 hlimit = dquot->dq_dqb.dqb_bhardlimit;
 376                 slimit = dquot->dq_dqb.dqb_bsoftlimit;
 377                 time = &dquot->dq_dqb.dqb_btime;
 378         } else {
 379                 grace = info->qi_info[QDATA_IS_GRP(qdata)].dqi_igrace;
 380                 usage = (__u64 *) & dquot->dq_dqb.dqb_curinodes;
 381                 hlimit = dquot->dq_dqb.dqb_ihardlimit;
 382                 slimit = dquot->dq_dqb.dqb_isoftlimit;
 383                 time = &dquot->dq_dqb.dqb_itime;
 384         }
 385
 386         /* if the quota limit in admin quotafile is zero, we just inform
 387          * slave to clear quota limit with zero qd_count */
 388         if (hlimit == 0 && slimit == 0) {
 389                 qdata->qd_count = 0;
 390                 GOTO(out, rc);
 391         }
 392
 393         switch (opc) {
 394         case QUOTA_DQACQ:
 395                 if (hlimit &&
 396                     QUSG(*usage + qdata->qd_count, QDATA_IS_BLK(qdata)) > hlimit)
 397                 {
 398                         if (QDATA_IS_CHANGE_QS(qdata) &&
 399                             QUSG(*usage, QDATA_IS_BLK(qdata)) < hlimit)
 400                                 qdata->qd_count = (hlimit -
 401                                         QUSG(*usage, QDATA_IS_BLK(qdata)))
 402                                         * (QDATA_IS_BLK(qdata) ?
 403                                            QUOTABLOCK_SIZE : 1);
 404                         else
 405                                 GOTO(out, rc = -EDQUOT);
 406                 }
 407
 408                 if (slimit &&
 409                     QUSG(*usage + qdata->qd_count, QDATA_IS_BLK(qdata)) > slimit) {
 410                         if (*time && cfs_time_current_sec() >= *time)
 411                                 GOTO(out, rc = -EDQUOT);
 412                         else if (!*time)
 413                                 *time = cfs_time_current_sec() + grace;
 414                 }
 415
 416                 *usage += qdata->qd_count;
 417                 break;
 418         case QUOTA_DQREL:
 419                 /* The usage in administrative file might be incorrect before
 420                  * recovery done */
 421                 if (*usage - qdata->qd_count < 0)
 422                         *usage = 0;
 423                 else
 424                         *usage -= qdata->qd_count;
 425
 426                 /* (usage <= soft limit) but not (usage < soft limit) */
 427                 if (!slimit || QUSG(*usage, QDATA_IS_BLK(qdata)) <= slimit)
 428                         *time = 0;
 429                 break;
 430         default:
 431                 LBUG();
 432         }
 433
 434         rc = fsfilt_dquot(obd, dquot, QFILE_WR_DQUOT);
 435         EXIT;
 436 out:
 437         up(&dquot->dq_sem);
 438         up(&mds->mds_qonoff_sem);
 439         lustre_dqput(dquot);
 440         if (rc != -EDQUOT)
 441                 dqacq_adjust_qunit_sz(obd, qdata->qd_id, QDATA_IS_GRP(qdata),
 442                                       QDATA_IS_BLK(qdata));
 443
 444         lqs = quota_search_lqs(LQS_KEY(QDATA_IS_GRP(qdata), qdata->qd_id),
 445                                qctxt, 0);
 446         if (lqs == NULL || IS_ERR(lqs)) {
 447                 CDEBUG(D_INFO, "Can't find the lustre qunit size!\n");
 448                 qdata->qd_qunit  = QDATA_IS_BLK(qdata) ? qctxt->lqc_bunit_sz :
 449                                                          qctxt->lqc_iunit_sz;
 450         } else {
 451                 spin_lock(&lqs->lqs_lock);
 452                 qdata->qd_qunit  = QDATA_IS_BLK(qdata) ? lqs->lqs_bunit_sz :
 453                                                          lqs->lqs_iunit_sz;
 454                 spin_unlock(&lqs->lqs_lock);
 455         }
 456
 457         if (QDATA_IS_BLK(qdata))
 458                 QDATA_SET_ADJBLK(qdata);
 459         else
 460                 QDATA_SET_ADJINO(qdata);
 461
 462         QDATA_DEBUG(qdata, "alloc/release qunit in dqacq_handler\n");
 463         if (lqs)
 464                 lqs_putref(lqs);
 465
 466         return rc;
 467 }
 468
 469 int mds_quota_adjust(struct obd_device *obd, const unsigned int qcids[],
 470                      const unsigned int qpids[], int rc, int opc)
 471 {
 472         struct lustre_quota_ctxt *qctxt = &obd->u.obt.obt_qctxt;
 473         int rc2 = 0;
 474         ENTRY;
 475
 476         if (rc && rc != -EDQUOT && rc != ENOLCK)
 477                 RETURN(0);
 478
 479         switch (opc) {
 480         case FSFILT_OP_SETATTR:
 481                 /* release file quota on original owner */
 482                 rc2 |= qctxt_adjust_qunit(obd, qctxt, qpids, 0, 0, NULL);
 483                 /* release block quota on original owner */
 484                 rc2 |= qctxt_adjust_qunit(obd, qctxt, qpids, 1, 0, NULL);
 485                 /* acquire file quota on current owner */
 486                 rc2 |= qctxt_adjust_qunit(obd, qctxt, qcids, 0, 0, NULL);
 487                 /* acquire block quota on current owner */
 488                 rc2 |= qctxt_adjust_qunit(obd, qctxt, qcids, 1, 0, NULL);
 489                 break;
 490         case FSFILT_OP_UNLINK_PARTIAL_CHILD:
 491                 /* release file quota on child */
 492                 rc2 |= qctxt_adjust_qunit(obd, qctxt, qcids, 0, 0, NULL);
 493                 /* rlease block quota on child */
 494                 rc2 |= qctxt_adjust_qunit(obd, qctxt, qcids, 1, 0, NULL);
 495                 break;
 496         case FSFILT_OP_CREATE_PARTIAL_CHILD:
 497                 /* acquire file quota on child */
 498                 rc2 |= qctxt_adjust_qunit(obd, qctxt, qcids, 0, 0, NULL);
 499                 /* acquire block quota on child */
 500                 rc2 |= qctxt_adjust_qunit(obd, qctxt, qcids, 1, 0, NULL);
 501                 break;
 502         case FSFILT_OP_LINK:
 503                 /* acquire block quota on parent */
 504                 rc2 |= qctxt_adjust_qunit(obd, qctxt, qpids, 1, 0, NULL);
 505                 break;
 506         case FSFILT_OP_UNLINK:
 507                 /* release block quota on parent */
 508                 rc2 |= qctxt_adjust_qunit(obd, qctxt, qpids, 1, 0, NULL);
 509                 /* release file quota on child */
 510                 rc2 |= qctxt_adjust_qunit(obd, qctxt, qcids, 0, 0, NULL);
 511                 if (qpids[0] != qcids[0] || qpids[1] != qcids[1])
 512                         /* release block quota on child */
 513                         rc2 |= qctxt_adjust_qunit(obd, qctxt, qcids, 1, 0,
 514                                                   NULL);
 515                 break;
 516         case FSFILT_OP_UNLINK_PARTIAL_PARENT:
 517                 /* release block quota on parent */
 518                 rc2 |= qctxt_adjust_qunit(obd, qctxt, qpids, 1, 0, NULL);
 519                 break;
 520         case FSFILT_OP_CREATE:
 521                 /* acquire block quota on parent */
 522                 rc2 |= qctxt_adjust_qunit(obd, qctxt, qpids, 1, 0, NULL);
 523                 /* acquire file quota on child */
 524                 rc2 |= qctxt_adjust_qunit(obd, qctxt, qcids, 0, 0, NULL);
 525                 if (qpids[0] != qcids[0] || qpids[1] != qcids[1])
 526                         /* acquire block quota on child */
 527                         rc2 |= qctxt_adjust_qunit(obd, qctxt, qcids, 1, 0,
 528                                                   NULL);
 529                 break;
 530         default:
 531                 LBUG();
 532                 break;
 533         }
 534
 535         if (rc2)
 536                 CDEBUG(rc2 == QUOTA_REQ_RETURNED ? D_QUOTA: D_ERROR,
 537                        "mds adjust qunit %ssuccessfully! (opc:%d rc:%d)\n",
 538                        rc2 == QUOTA_REQ_RETURNED ? "" : "un", opc, rc2);
 539         RETURN(0);
 540 }
 541
 542 int filter_quota_adjust(struct obd_device *obd, const unsigned int qcids[],
 543                         const unsigned int qpids[], int rc, int opc)
 544 {
 545         struct lustre_quota_ctxt *qctxt = &obd->u.obt.obt_qctxt;
 546         int rc2 = 0;
 547         ENTRY;
 548
 549         if (rc && rc != -EDQUOT)
 550                 RETURN(0);
 551
 552         switch (opc) {
 553         case FSFILT_OP_SETATTR:
 554                 /* acquire/release block quota on original & current owner */
 555                 rc = qctxt_adjust_qunit(obd, qctxt, qcids, 1, 0, NULL);
 556                 rc2 = qctxt_adjust_qunit(obd, qctxt, qpids, 1, 0, NULL);
 557                 break;
 558         case FSFILT_OP_UNLINK:
 559                 /* release block quota on this owner */
 560         case FSFILT_OP_CREATE: /* XXX for write operation on obdfilter */
 561                 /* acquire block quota on this owner */
 562                 rc = qctxt_adjust_qunit(obd, qctxt, qcids, 1, 0, NULL);
 563                 break;
 564         default:
 565                 LBUG();
 566                 break;
 567         }
 568
 569         if (rc || rc2) {
 570                 if (!rc)
 571                         rc = rc2;
 572                 CDEBUG(rc == QUOTA_REQ_RETURNED ? D_QUOTA: D_ERROR,
 573                        "filter adjust qunit %ssuccessfully! (opc:%d rc%d)\n",
 574                        QUOTA_REQ_RETURNED ? "" : "un", opc, rc);
 575         }
 576
 577         RETURN(0);
 578 }
 579
 580 static const char prefix[] = "OBJECTS/";
 581
 582 int mds_quota_invalidate(struct obd_device *obd, struct obd_quotactl *oqctl)
 583 {
 584         struct mds_obd *mds = &obd->u.mds;
 585         struct lustre_quota_info *qinfo = &mds->mds_quota_info;
 586         int rc = 0, i;
 587         char *quotafile[] = LUSTRE_ADMIN_QUOTAFILES_V2;
 588         char name[64];
 589         struct lvfs_run_ctxt saved;
 590
 591         LASSERT(qinfo->qi_version == LUSTRE_QUOTA_V2);
 592
 593         if (oqctl->qc_type != USRQUOTA &&
 594             oqctl->qc_type != GRPQUOTA &&
 595             oqctl->qc_type != UGQUOTA)
 596                 return -EINVAL;
 597
 598         push_ctxt(&saved, &obd->obd_lvfs_ctxt, NULL);
 599
 600         down(&mds->mds_qonoff_sem);
 601
 602         for (i = 0; i < MAXQUOTAS; i++) {
 603                 struct file *fp;
 604
 605                 if (!Q_TYPESET(oqctl, i))
 606                         continue;
 607
 608                 /* quota file has been opened ? */
 609                 if (qinfo->qi_files[i]) {
 610                         rc = -EBUSY;
 611                         goto out;
 612                 }
 613
 614                 LASSERT(strlen(quotafile[i]) + sizeof(prefix) <= sizeof(name));
 615                 sprintf(name, "%s%s", prefix, quotafile[i]);
 616
 617                 fp = filp_open(name, O_CREAT | O_TRUNC | O_RDWR, 0644);
 618                 if (IS_ERR(fp)) {
 619                         rc = PTR_ERR(fp);
 620                         CERROR("error invalidating admin quotafile %s (rc:%d)\n",
 621                                name, rc);
 622                 }
 623                 else
 624                         filp_close(fp, 0);
 625         }
 626
 627 out:
 628         up(&mds->mds_qonoff_sem);
 629
 630         pop_ctxt(&saved, &obd->obd_lvfs_ctxt, NULL);
 631
 632         return rc;
 633 }
 634
 635 int mds_quota_finvalidate(struct obd_device *obd, struct obd_quotactl *oqctl)
 636 {
 637         struct mds_obd *mds = &obd->u.mds;
 638         int rc;
 639         struct lvfs_run_ctxt saved;
 640
 641         if (oqctl->qc_type != USRQUOTA &&
 642             oqctl->qc_type != GRPQUOTA &&
 643             oqctl->qc_type != UGQUOTA)
 644                 RETURN(-EINVAL);
 645
 646         push_ctxt(&saved, &obd->obd_lvfs_ctxt, NULL);
 647         down(&mds->mds_qonoff_sem);
 648
 649         oqctl->qc_cmd = Q_FINVALIDATE;
 650         rc = fsfilt_quotactl(obd, obd->u.obt.obt_sb, oqctl);
 651         if (!rc)
 652                 rc = obd_quotactl(mds->mds_osc_exp, oqctl);
 653
 654         up(&mds->mds_qonoff_sem);
 655         pop_ctxt(&saved, &obd->obd_lvfs_ctxt, NULL);
 656
 657         return rc;
 658 }
 659
 660 int init_admin_quotafiles(struct obd_device *obd, struct obd_quotactl *oqctl)
 661 {
 662         struct mds_obd *mds = &obd->u.mds;
 663         struct lustre_quota_info *qinfo = &mds->mds_quota_info;
 664         const char *quotafile[] = LUSTRE_ADMIN_QUOTAFILES_V2;
 665         struct lvfs_run_ctxt saved;
 666         char name[64];
 667         int i, rc = 0;
 668         ENTRY;
 669
 670         LASSERT(qinfo->qi_version == LUSTRE_QUOTA_V2);
 671
 672         push_ctxt(&saved, &obd->obd_lvfs_ctxt, NULL);
 673
 674         down(&mds->mds_qonoff_sem);
 675
 676         for (i = 0; i < MAXQUOTAS && !rc; i++) {
 677                 struct file *fp;
 678
 679                 if (!Q_TYPESET(oqctl, i))
 680                         continue;
 681
 682                 /* quota file has been opened ? */
 683                 if (qinfo->qi_files[i]) {
 684                         CWARN("init %s admin quotafile while quota on.\n",
 685                               i == USRQUOTA ? "user" : "group");
 686                         continue;
 687                 }
 688
 689                 LASSERT(strlen(quotafile[i]) + sizeof(prefix) <= sizeof(name));
 690                 sprintf(name, "%s%s", prefix, quotafile[i]);
 691
 692                 /* check if quota file exists and is correct */
 693                 fp = filp_open(name, O_RDONLY, 0);
 694                 if (!IS_ERR(fp)) {
 695                         /* irregular file is not the right place for quota */
 696                         if (!S_ISREG(fp->f_dentry->d_inode->i_mode)) {
 697                                 CERROR("admin quota file %s is not "
 698                                        "regular!", name);
 699                                 filp_close(fp, 0);
 700                                 rc = -EINVAL;
 701                                 break;
 702                         }
 703                         qinfo->qi_files[i] = fp;
 704                         rc = fsfilt_quotainfo(obd, qinfo, i, QFILE_CHK);
 705                         qinfo->qi_files[i] = 0;
 706                         filp_close(fp, 0);
 707                 }
 708                 else
 709                         rc = PTR_ERR(fp);
 710
 711                 if (!rc)
 712                         continue;
 713
 714                 /* -EINVAL may be returned by quotainfo for bad quota file */
 715                 if (rc != -ENOENT && rc != -EINVAL) {
 716                         CERROR("error opening old quota file %s (%d)\n",
 717                                name, rc);
 718                         break;
 719                 }
 720
 721                 CDEBUG(D_INFO, "%s new quota file %s\n", name,
 722                        rc == -ENOENT ? "creating" : "overwriting");
 723
 724                 /* create quota file overwriting old if needed */
 725                 fp = filp_open(name, O_CREAT | O_TRUNC | O_RDWR, 0644);
 726                 if (IS_ERR(fp)) {
 727                         rc = PTR_ERR(fp);
 728                         CERROR("error creating admin quotafile %s (rc:%d)\n",
 729                                name, rc);
 730                         break;
 731                 }
 732
 733                 qinfo->qi_files[i] = fp;
 734
 735                 rc = fsfilt_quotainfo(obd, qinfo, i, QFILE_INIT_INFO);
 736                 if (rc)
 737                         CERROR("error init %s admin quotafile! (rc:%d)\n",
 738                                i == USRQUOTA ? "user" : "group", rc);
 739
 740                 filp_close(fp, 0);
 741                 qinfo->qi_files[i] = NULL;
 742         }
 743         up(&mds->mds_qonoff_sem);
 744
 745         pop_ctxt(&saved, &obd->obd_lvfs_ctxt, NULL);
 746         RETURN(rc);
 747 }
 748
 749 static int close_quota_files(struct obd_quotactl *oqctl,
 750                              struct lustre_quota_info *qinfo)
 751 {
 752         int i, rc = 0;
 753         ENTRY;
 754
 755         for (i = 0; i < MAXQUOTAS; i++) {
 756                 if (!Q_TYPESET(oqctl, i))
 757                         continue;
 758                 if (qinfo->qi_files[i] == NULL) {
 759                         rc = -ESRCH;
 760                         continue;
 761                 }
 762                 filp_close(qinfo->qi_files[i], 0);
 763                 qinfo->qi_files[i] = NULL;
 764         }
 765         RETURN(rc);
 766 }
 767
 768 int mds_admin_quota_on(struct obd_device *obd, struct obd_quotactl *oqctl)
 769 {
 770         struct mds_obd *mds = &obd->u.mds;
 771         struct lustre_quota_info *qinfo = &mds->mds_quota_info;
 772         const char *quotafile[] = LUSTRE_ADMIN_QUOTAFILES_V2;
 773         char name[64];
 774         int i, rc = 0;
 775         ENTRY;
 776
 777         LASSERT(qinfo->qi_version == LUSTRE_QUOTA_V2);
 778
 779         /* open admin quota files and read quotafile info */
 780         for (i = 0; i < MAXQUOTAS; i++) {
 781                 struct file *fp;
 782
 783                 if (!Q_TYPESET(oqctl, i))
 784                         continue;
 785
 786                 LASSERT(strlen(quotafile[i])
 787                         + sizeof(prefix) <= sizeof(name));
 788                 sprintf(name, "%s%s", prefix, quotafile[i]);
 789
 790                 if (qinfo->qi_files[i] != NULL) {
 791                         rc = -EBUSY;
 792                         break;
 793                 }
 794
 795                 fp = filp_open(name, O_RDWR, 0);
 796                 if (IS_ERR(fp) || !S_ISREG(fp->f_dentry->d_inode->i_mode)) {
 797                         rc = IS_ERR(fp) ? PTR_ERR(fp) : -EINVAL;
 798                         CERROR("error open/create %s! (rc:%d)\n", name, rc);
 799                         break;
 800                 }
 801                 qinfo->qi_files[i] = fp;
 802
 803                 rc = fsfilt_quotainfo(obd, qinfo, i, QFILE_CHK);
 804                 if (rc) {
 805                         CERROR("invalid quota file %s! (rc:%d)\n", name, rc);
 806                         break;
 807                 }
 808
 809                 rc = fsfilt_quotainfo(obd, qinfo, i, QFILE_RD_INFO);
 810                 if (rc) {
 811                         CERROR("error read quotainfo of %s! (rc:%d)\n", name,
 812                                rc);
 813                         break;
 814                 }
 815         }
 816
 817         if (rc && rc != -EBUSY)
 818                 close_quota_files(oqctl, qinfo);
 819
 820         RETURN(rc);
 821 }
 822
 823 int mds_admin_quota_off(struct obd_device *obd,
 824                         struct obd_quotactl *oqctl)
 825 {
 826         struct mds_obd *mds = &obd->u.mds;
 827         struct lustre_quota_info *qinfo = &mds->mds_quota_info;
 828         int rc;
 829         ENTRY;
 830
 831         /* close admin quota files */
 832         rc = close_quota_files(oqctl, qinfo);
 833         RETURN(rc);
 834 }
 835
 836 int mds_quota_on(struct obd_device *obd, struct obd_quotactl *oqctl)
 837 {
 838         struct mds_obd *mds = &obd->u.mds;
 839         struct obd_device_target *obt = &obd->u.obt;
 840         struct lvfs_run_ctxt saved;
 841         int rc;
 842         ENTRY;
 843
 844         if (oqctl->qc_type != USRQUOTA &&
 845             oqctl->qc_type != GRPQUOTA &&
 846             oqctl->qc_type != UGQUOTA)
 847                 RETURN(-EINVAL);
 848
 849         if (!atomic_dec_and_test(&obt->obt_quotachecking)) {
 850                 CDEBUG(D_INFO, "other people are doing quotacheck\n");
 851                 atomic_inc(&obt->obt_quotachecking);
 852                 RETURN(-EBUSY);
 853         }
 854
 855         LASSERT(!obt->obt_qctxt.lqc_immutable);
 856         down(&mds->mds_qonoff_sem);
 857         push_ctxt(&saved, &obd->obd_lvfs_ctxt, NULL);
 858         rc = mds_admin_quota_on(obd, oqctl);
 859         if (rc)
 860                 GOTO(out, rc);
 861
 862         rc = fsfilt_quotactl(obd, obd->u.obt.obt_sb, oqctl);
 863         if (!rc)
 864                 obt->obt_qctxt.lqc_flags |= UGQUOTA2LQC(oqctl->qc_type);
 865         else
 866                 GOTO(out, rc);
 867
 868         rc = obd_quotactl(mds->mds_osc_exp, oqctl);
 869
 870 out:
 871         pop_ctxt(&saved, &obd->obd_lvfs_ctxt, NULL);
 872         up(&mds->mds_qonoff_sem);
 873         atomic_inc(&obt->obt_quotachecking);
 874         RETURN(rc);
 875 }
 876
 877 int mds_quota_off(struct obd_device *obd, struct obd_quotactl *oqctl)
 878 {
 879         struct mds_obd *mds = &obd->u.mds;
 880         struct obd_device_target *obt = &obd->u.obt;
 881         struct lvfs_run_ctxt saved;
 882         int rc, rc2, imm;
 883         ENTRY;
 884
 885         imm = oqctl->qc_type & IMMQUOTA;
 886         oqctl->qc_type &= ~IMMQUOTA;
 887
 888         if (oqctl->qc_type != USRQUOTA &&
 889             oqctl->qc_type != GRPQUOTA &&
 890             oqctl->qc_type != UGQUOTA)
 891                 RETURN(-EINVAL);
 892
 893         if (!atomic_dec_and_test(&obt->obt_quotachecking)) {
 894                 CDEBUG(D_INFO, "other people are doing quotacheck\n");
 895                 atomic_inc(&obt->obt_quotachecking);
 896                 RETURN(-EBUSY);
 897         }
 898
 899         down(&mds->mds_qonoff_sem);
 900         /* close admin quota files */
 901         push_ctxt(&saved, &obd->obd_lvfs_ctxt, NULL);
 902         mds_admin_quota_off(obd, oqctl);
 903
 904         rc = obd_quotactl(mds->mds_osc_exp, oqctl);
 905         rc2 = fsfilt_quotactl(obd, obd->u.obt.obt_sb, oqctl);
 906         if (!rc2) {
 907                 if (imm)
 908                         obt->obt_qctxt.lqc_immutable = 1;
 909                 obt->obt_qctxt.lqc_flags &= ~UGQUOTA2LQC(oqctl->qc_type);
 910         }
 911         pop_ctxt(&saved, &obd->obd_lvfs_ctxt, NULL);
 912         up(&mds->mds_qonoff_sem);
 913         atomic_inc(&obt->obt_quotachecking);
 914
 915         RETURN(rc ?: rc2);
 916 }
 917
 918 int mds_set_dqinfo(struct obd_device *obd, struct obd_quotactl *oqctl)
 919 {
 920         struct mds_obd *mds = &obd->u.mds;
 921         struct lustre_quota_info *qinfo = &mds->mds_quota_info;
 922         struct obd_dqinfo *dqinfo = &oqctl->qc_dqinfo;
 923         int rc;
 924         ENTRY;
 925
 926         if (oqctl->qc_type != USRQUOTA &&
 927             oqctl->qc_type != GRPQUOTA)
 928                 RETURN(-EINVAL);
 929
 930         down(&mds->mds_qonoff_sem);
 931         if (qinfo->qi_files[oqctl->qc_type] == NULL) {
 932                 rc = -ESRCH;
 933                 goto out;
 934         }
 935
 936         qinfo->qi_info[oqctl->qc_type].dqi_bgrace = dqinfo->dqi_bgrace;
 937         qinfo->qi_info[oqctl->qc_type].dqi_igrace = dqinfo->dqi_igrace;
 938         qinfo->qi_info[oqctl->qc_type].dqi_flags = dqinfo->dqi_flags;
 939
 940         rc = fsfilt_quotainfo(obd, qinfo, oqctl->qc_type, QFILE_WR_INFO);
 941
 942 out:
 943         up(&mds->mds_qonoff_sem);
 944         RETURN(rc);
 945 }
 946
 947 int mds_get_dqinfo(struct obd_device *obd, struct obd_quotactl *oqctl)
 948 {
 949         struct mds_obd *mds = &obd->u.mds;
 950         struct lustre_quota_info *qinfo = &mds->mds_quota_info;
 951         struct obd_dqinfo *dqinfo = &oqctl->qc_dqinfo;
 952         int rc = 0;
 953         ENTRY;
 954
 955         if (oqctl->qc_type != USRQUOTA &&
 956             oqctl->qc_type != GRPQUOTA)
 957                 RETURN(-EINVAL);
 958
 959         down(&mds->mds_qonoff_sem);
 960         if (qinfo->qi_files[oqctl->qc_type] == NULL) {
 961                 rc = -ESRCH;
 962                 goto out;
 963         }
 964
 965         dqinfo->dqi_bgrace = qinfo->qi_info[oqctl->qc_type].dqi_bgrace;
 966         dqinfo->dqi_igrace = qinfo->qi_info[oqctl->qc_type].dqi_igrace;
 967         dqinfo->dqi_flags = qinfo->qi_info[oqctl->qc_type].dqi_flags;
 968
 969 out:
 970         up(&mds->mds_qonoff_sem);
 971         RETURN(rc);
 972 }
 973
 974 int dquot_create_oqaq(struct lustre_quota_ctxt *qctxt,
 975                       struct lustre_dquot *dquot, __u32 ost_num, __u32 mdt_num,
 976                       int type, struct quota_adjust_qunit *oqaq)
 977 {
 978         __u64 bunit_curr_o, iunit_curr_o;
 979         unsigned long shrink_qunit_limit = qctxt->lqc_cqs_boundary_factor;
 980         unsigned long cqs_factor = qctxt->lqc_cqs_qs_factor;
 981         __u64 blimit = dquot->dq_dqb.dqb_bhardlimit ?
 982                 dquot->dq_dqb.dqb_bhardlimit : dquot->dq_dqb.dqb_bsoftlimit;
 983         __u64 ilimit = dquot->dq_dqb.dqb_ihardlimit ?
 984                 dquot->dq_dqb.dqb_ihardlimit : dquot->dq_dqb.dqb_isoftlimit;
 985         int rc = 0;
 986         ENTRY;
 987
 988         if (!dquot || !oqaq)
 989                 RETURN(-EINVAL);
 990         LASSERT_SEM_LOCKED(&dquot->dq_sem);
 991         LASSERT(oqaq->qaq_iunit_sz);
 992         LASSERT(oqaq->qaq_bunit_sz);
 993
 994         /* don't change qunit size */
 995         if (!qctxt->lqc_switch_qs)
 996                 RETURN(rc);
 997
 998         bunit_curr_o = oqaq->qaq_bunit_sz;
 999         iunit_curr_o = oqaq->qaq_iunit_sz;
1000
1001         if (dquot->dq_type == GRPQUOTA)
1002                 QAQ_SET_GRP(oqaq);
1003
1004         if ((type & LQUOTA_FLAGS_ADJBLK) && blimit) {
1005                 __u64 b_limitation =
1006                         oqaq->qaq_bunit_sz * (ost_num + 1) * shrink_qunit_limit;
1007                 /* enlarge block qunit size */
1008                 while (blimit >
1009                        QUSG(dquot->dq_dqb.dqb_curspace + 2 * b_limitation, 1)) {
1010                         oqaq->qaq_bunit_sz =
1011                                 QUSG(oqaq->qaq_bunit_sz * cqs_factor, 1)
1012                                 << QUOTABLOCK_BITS;
1013                         b_limitation = oqaq->qaq_bunit_sz * (ost_num + 1) *
1014                                 shrink_qunit_limit;
1015                 }
1016
1017                 if (oqaq->qaq_bunit_sz > qctxt->lqc_bunit_sz)
1018                         oqaq->qaq_bunit_sz = qctxt->lqc_bunit_sz;
1019
1020                 /* shrink block qunit size */
1021                 while (blimit <
1022                        QUSG(dquot->dq_dqb.dqb_curspace + b_limitation, 1)) {
1023                         do_div(oqaq->qaq_bunit_sz , cqs_factor);
1024                         oqaq->qaq_bunit_sz = QUSG(oqaq->qaq_bunit_sz, 1) <<
1025                                 QUOTABLOCK_BITS;
1026                         b_limitation = oqaq->qaq_bunit_sz * (ost_num + 1) *
1027                                 shrink_qunit_limit;
1028                         if (oqaq->qaq_bunit_sz <  qctxt->lqc_cqs_least_bunit)
1029                                 break;
1030                 }
1031
1032                 if (oqaq->qaq_bunit_sz < qctxt->lqc_cqs_least_bunit)
1033                         oqaq->qaq_bunit_sz = qctxt->lqc_cqs_least_bunit;
1034
1035                 if (bunit_curr_o != oqaq->qaq_bunit_sz)
1036                         QAQ_SET_ADJBLK(oqaq);
1037
1038         }
1039
1040         if ((type & LQUOTA_FLAGS_ADJINO) && ilimit) {
1041                 __u64 i_limitation =
1042                         oqaq->qaq_iunit_sz * mdt_num * shrink_qunit_limit;
1043                 /* enlarge file qunit size */
1044                 while (ilimit > dquot->dq_dqb.dqb_curinodes
1045                        + 2 * i_limitation) {
1046                         oqaq->qaq_iunit_sz = oqaq->qaq_iunit_sz * cqs_factor;
1047                         i_limitation = oqaq->qaq_iunit_sz * mdt_num *
1048                                 shrink_qunit_limit;
1049                 }
1050
1051                 if (oqaq->qaq_iunit_sz > qctxt->lqc_iunit_sz)
1052                         oqaq->qaq_iunit_sz = qctxt->lqc_iunit_sz;
1053
1054                 /* shrink file qunit size */
1055                 while (ilimit < dquot->dq_dqb.dqb_curinodes
1056                        + i_limitation) {
1057                         do_div(oqaq->qaq_iunit_sz, cqs_factor);
1058                         i_limitation = oqaq->qaq_iunit_sz * mdt_num *
1059                                        shrink_qunit_limit;
1060                         if (oqaq->qaq_iunit_sz < qctxt->lqc_cqs_least_iunit)
1061                                 break;
1062                 }
1063
1064                 if (oqaq->qaq_iunit_sz < qctxt->lqc_cqs_least_iunit)
1065                         oqaq->qaq_iunit_sz = qctxt->lqc_cqs_least_iunit;
1066
1067                 if (iunit_curr_o != oqaq->qaq_iunit_sz)
1068                         QAQ_SET_ADJINO(oqaq);
1069
1070         }
1071
1072         QAQ_DEBUG(oqaq, "the oqaq computed\n");
1073
1074         RETURN(rc);
1075 }
1076
1077 static int mds_init_slave_ilimits(struct obd_device *obd,
1078                                   struct obd_quotactl *oqctl, int set)
1079 {
1080         /* XXX: for file limits only adjust local now */
1081         struct obd_device_target *obt = &obd->u.obt;
1082         struct lustre_quota_ctxt *qctxt = &obt->obt_qctxt;
1083         unsigned int id[MAXQUOTAS] = { 0, 0 };
1084         struct obd_quotactl *ioqc = NULL;
1085         struct lustre_qunit_size *lqs;
1086         int flag;
1087         int rc;
1088         ENTRY;
1089
1090         /* if we are going to set zero limit, needn't init slaves */
1091         if (!oqctl->qc_dqblk.dqb_ihardlimit && !oqctl->qc_dqblk.dqb_isoftlimit &&
1092             !set)
1093                 RETURN(0);
1094
1095         OBD_ALLOC_PTR(ioqc);
1096         if (!ioqc)
1097                 RETURN(-ENOMEM);
1098
1099         flag = oqctl->qc_dqblk.dqb_ihardlimit ||
1100                oqctl->qc_dqblk.dqb_isoftlimit || !set;
1101         ioqc->qc_cmd = flag ? Q_INITQUOTA : Q_SETQUOTA;
1102         ioqc->qc_id = oqctl->qc_id;
1103         ioqc->qc_type = oqctl->qc_type;
1104         ioqc->qc_dqblk.dqb_valid = QIF_ILIMITS;
1105         ioqc->qc_dqblk.dqb_ihardlimit = flag ? MIN_QLIMIT : 0;
1106
1107         /* build lqs for mds */
1108         lqs = quota_search_lqs(LQS_KEY(oqctl->qc_type, oqctl->qc_id),
1109                                qctxt, flag ? 1 : 0);
1110         if (lqs && !IS_ERR(lqs)) {
1111                 if (flag)
1112                         lqs->lqs_flags |= QI_SET;
1113                 else
1114                         lqs->lqs_flags &= ~QI_SET;
1115                 lqs_putref(lqs);
1116         } else {
1117                 CERROR("fail to %s lqs for inode(%s id: %u)!\n",
1118                        flag ? "create" : "search",
1119                        oqctl->qc_type ? "group" : "user",
1120                        oqctl->qc_id);
1121                 GOTO(out, rc = PTR_ERR(lqs));
1122         }
1123
1124         /* set local limit to MIN_QLIMIT */
1125         rc = fsfilt_quotactl(obd, obd->u.obt.obt_sb, ioqc);
1126         if (rc)
1127                 GOTO(out, rc);
1128
1129         /* trigger local qunit pre-acquire */
1130         if (oqctl->qc_type == USRQUOTA)
1131                 id[USRQUOTA] = oqctl->qc_id;
1132         else
1133                 id[GRPQUOTA] = oqctl->qc_id;
1134
1135         rc = qctxt_adjust_qunit(obd, &obd->u.obt.obt_qctxt, id, 0, 0, NULL);
1136         if (rc == -EDQUOT || rc == -EBUSY) {
1137                 CDEBUG(D_QUOTA, "rc: %d.\n", rc);
1138                 rc = 0;
1139         }
1140         if (rc) {
1141                 CDEBUG(D_QUOTA,"error mds adjust local file quota! (rc:%d)\n",
1142                        rc);
1143                 GOTO(out, rc);
1144         }
1145         /* FIXME initialize all slaves in CMD */
1146         EXIT;
1147 out:
1148         if (ioqc)
1149                 OBD_FREE_PTR(ioqc);
1150         return rc;
1151 }
1152
1153 static int mds_init_slave_blimits(struct obd_device *obd,
1154                                   struct obd_quotactl *oqctl, int set)
1155 {
1156         struct obd_device_target *obt = &obd->u.obt;
1157         struct lustre_quota_ctxt *qctxt = &obt->obt_qctxt;
1158         struct mds_obd *mds = &obd->u.mds;
1159         struct obd_quotactl *ioqc;
1160         struct lustre_qunit_size *lqs;
1161         unsigned int id[MAXQUOTAS] = { 0, 0 };
1162         int rc;
1163         int flag;
1164         ENTRY;
1165
1166         /* if we are going to set zero limit, needn't init slaves */
1167         if (!oqctl->qc_dqblk.dqb_bhardlimit && !oqctl->qc_dqblk.dqb_bsoftlimit &&
1168             !set)
1169                 RETURN(0);
1170
1171         OBD_ALLOC_PTR(ioqc);
1172         if (!ioqc)
1173                 RETURN(-ENOMEM);
1174
1175         flag = oqctl->qc_dqblk.dqb_bhardlimit ||
1176                oqctl->qc_dqblk.dqb_bsoftlimit || !set;
1177         ioqc->qc_cmd = flag ? Q_INITQUOTA : Q_SETQUOTA;
1178         ioqc->qc_id = oqctl->qc_id;
1179         ioqc->qc_type = oqctl->qc_type;
1180         ioqc->qc_dqblk.dqb_valid = QIF_BLIMITS;
1181         ioqc->qc_dqblk.dqb_bhardlimit = flag ? MIN_QLIMIT : 0;
1182
1183         /* build lqs for mds */
1184         lqs = quota_search_lqs(LQS_KEY(oqctl->qc_type, oqctl->qc_id),
1185                                qctxt, flag ? 1 : 0);
1186         if (lqs && !IS_ERR(lqs)) {
1187                 if (flag)
1188                         lqs->lqs_flags |= QB_SET;
1189                 else
1190                         lqs->lqs_flags &= ~QB_SET;
1191                 lqs_putref(lqs);
1192         } else {
1193                 CERROR("fail to %s lqs for block(%s id: %u)!\n",
1194                        flag ? "create" : "search",
1195                        oqctl->qc_type ? "group" : "user",
1196                        oqctl->qc_id);
1197                 GOTO(out, rc = PTR_ERR(lqs));
1198         }
1199
1200         rc = fsfilt_quotactl(obd, obd->u.obt.obt_sb, ioqc);
1201         if (rc)
1202                 GOTO(out, rc);
1203
1204         /* trigger local qunit pre-acquire */
1205         if (oqctl->qc_type == USRQUOTA)
1206                 id[USRQUOTA] = oqctl->qc_id;
1207         else
1208                 id[GRPQUOTA] = oqctl->qc_id;
1209
1210         /* initialize all slave's limit */
1211         rc = obd_quotactl(mds->mds_osc_exp, ioqc);
1212
1213         rc = qctxt_adjust_qunit(obd, &obd->u.obt.obt_qctxt, id, 1, 0, NULL);
1214         if (rc == -EDQUOT || rc == -EBUSY) {
1215                 CDEBUG(D_QUOTA, "rc: %d.\n", rc);
1216                 rc = 0;
1217         }
1218         if (rc) {
1219                 CERROR("error mds adjust local block quota! (rc:%d)\n", rc);
1220                 GOTO(out, rc);
1221         }
1222
1223         EXIT;
1224 out:
1225         OBD_FREE_PTR(ioqc);
1226         return rc;
1227 }
1228
1229 static void adjust_lqs(struct obd_device *obd, struct quota_adjust_qunit *qaq)
1230 {
1231         struct lustre_quota_ctxt *qctxt = &obd->u.obt.obt_qctxt;
1232         int rc = 0;
1233
1234         QAQ_SET_CREATE_LQS(qaq);
1235         /* adjust local lqs */
1236         rc = quota_adjust_slave_lqs(qaq, qctxt);
1237         if (rc < 0)
1238                 CERROR("adjust master's qunit size failed!(rc=%d)\n", rc);
1239
1240         /* adjust remote lqs */
1241         if (QAQ_IS_ADJBLK(qaq)) {
1242                 rc = obd_quota_adjust_qunit(obd->u.mds.mds_osc_exp, qaq, qctxt);
1243                 if (rc < 0)
1244                         CERROR("adjust slaves' qunit size failed!(rc=%d)\n", rc);
1245
1246         }
1247 }
1248
1249 int mds_set_dqblk(struct obd_device *obd, struct obd_quotactl *oqctl)
1250 {
1251         struct mds_obd *mds = &obd->u.mds;
1252         struct lustre_quota_ctxt *qctxt = &mds->mds_obt.obt_qctxt;
1253         struct obd_device *lov_obd = class_exp2obd(mds->mds_osc_exp);
1254         struct lov_obd *lov = &lov_obd->u.lov;
1255         struct quota_adjust_qunit *oqaq = NULL;
1256         struct lustre_quota_info *qinfo = &mds->mds_quota_info;
1257         __u64 ihardlimit, isoftlimit, bhardlimit, bsoftlimit;
1258         time_t btime, itime;
1259         struct lustre_dquot *dquot;
1260         struct obd_dqblk *dqblk = &oqctl->qc_dqblk;
1261         /* orig_set means if quota was set before; now_set means we are
1262          * setting/cancelling quota */
1263         int orig_set, now_set;
1264         int rc, rc2 = 0, flag = 0;
1265         ENTRY;
1266
1267         if (oqctl->qc_type != USRQUOTA &&
1268             oqctl->qc_type != GRPQUOTA)
1269                 RETURN(-EINVAL);
1270
1271         OBD_ALLOC_PTR(oqaq);
1272         if (!oqaq)
1273                 RETURN(-ENOMEM);
1274         down(&mds->mds_qonoff_sem);
1275         init_oqaq(oqaq, qctxt, oqctl->qc_id, oqctl->qc_type);
1276
1277         if (qinfo->qi_files[oqctl->qc_type] == NULL)
1278                 GOTO(out_sem, rc = -ESRCH);
1279
1280         dquot = lustre_dqget(obd, qinfo, oqctl->qc_id, oqctl->qc_type);
1281         if (IS_ERR(dquot))
1282                 GOTO(out_sem, rc = PTR_ERR(dquot));
1283         DQUOT_DEBUG(dquot, "get dquot in mds_set_blk\n");
1284         QINFO_DEBUG(dquot->dq_info, "get dquot in mds_set_blk\n");
1285
1286         down(&dquot->dq_sem);
1287
1288         if (dquot->dq_status) {
1289                 up(&dquot->dq_sem);
1290                 lustre_dqput(dquot);
1291                 GOTO(out_sem, rc = -EBUSY);
1292         }
1293         dquot->dq_status |= DQ_STATUS_SET;
1294
1295         ihardlimit = dquot->dq_dqb.dqb_ihardlimit;
1296         isoftlimit = dquot->dq_dqb.dqb_isoftlimit;
1297         bhardlimit = dquot->dq_dqb.dqb_bhardlimit;
1298         bsoftlimit = dquot->dq_dqb.dqb_bsoftlimit;
1299         btime = dquot->dq_dqb.dqb_btime;
1300         itime = dquot->dq_dqb.dqb_itime;
1301
1302         if (dqblk->dqb_valid & QIF_BTIME)
1303                 dquot->dq_dqb.dqb_btime = dqblk->dqb_btime;
1304         if (dqblk->dqb_valid & QIF_ITIME)
1305                 dquot->dq_dqb.dqb_itime = dqblk->dqb_itime;
1306
1307         if (dqblk->dqb_valid & QIF_BLIMITS) {
1308                 dquot->dq_dqb.dqb_bhardlimit = dqblk->dqb_bhardlimit;
1309                 dquot->dq_dqb.dqb_bsoftlimit = dqblk->dqb_bsoftlimit;
1310                 /* clear usage (limit pool) */
1311                 if (!dquot->dq_dqb.dqb_bhardlimit &&
1312                     !dquot->dq_dqb.dqb_bsoftlimit)
1313                         dquot->dq_dqb.dqb_curspace = 0;
1314
1315                 /* clear grace time */
1316                 if (!dqblk->dqb_bsoftlimit ||
1317                     toqb(dquot->dq_dqb.dqb_curspace) <= dqblk->dqb_bsoftlimit)
1318                         dquot->dq_dqb.dqb_btime = 0;
1319                 /* set grace only if user hasn't provided his own */
1320                 else if (!(dqblk->dqb_valid & QIF_BTIME))
1321                         dquot->dq_dqb.dqb_btime = cfs_time_current_sec() +
1322                                 qinfo->qi_info[dquot->dq_type].dqi_bgrace;
1323
1324                 flag |= LQUOTA_FLAGS_ADJBLK;
1325         }
1326
1327         if (dqblk->dqb_valid & QIF_ILIMITS) {
1328                 dquot->dq_dqb.dqb_ihardlimit = dqblk->dqb_ihardlimit;
1329                 dquot->dq_dqb.dqb_isoftlimit = dqblk->dqb_isoftlimit;
1330                 /* clear usage (limit pool) */
1331                 if (!dquot->dq_dqb.dqb_ihardlimit &&
1332                     !dquot->dq_dqb.dqb_isoftlimit)
1333                         dquot->dq_dqb.dqb_curinodes = 0;
1334
1335                 if (!dqblk->dqb_isoftlimit ||
1336                     dquot->dq_dqb.dqb_curinodes <= dqblk->dqb_isoftlimit)
1337                         dquot->dq_dqb.dqb_itime = 0;
1338                 else if (!(dqblk->dqb_valid & QIF_ITIME))
1339                         dquot->dq_dqb.dqb_itime = cfs_time_current_sec() +
1340                                 qinfo->qi_info[dquot->dq_type].dqi_igrace;
1341
1342                 flag |= LQUOTA_FLAGS_ADJINO;
1343         }
1344         QAQ_DEBUG(oqaq, "before dquot_create_oqaq\n");
1345         rc = dquot_create_oqaq(qctxt, dquot, lov->desc.ld_tgt_count, 1,
1346                                flag, oqaq);
1347         QAQ_DEBUG(oqaq, "after dquot_create_oqaq\n");
1348         if (rc < 0)
1349                 CDEBUG(D_QUOTA, "adjust qunit size failed! (rc:%d)\n", rc);
1350
1351
1352         rc = fsfilt_dquot(obd, dquot, QFILE_WR_DQUOT);
1353
1354         up(&dquot->dq_sem);
1355
1356         if (rc) {
1357                 CERROR("set limit failed! (rc:%d)\n", rc);
1358                 goto out;
1359         }
1360
1361         up(&mds->mds_qonoff_sem);
1362
1363         adjust_lqs(obd, oqaq);
1364
1365         orig_set = ihardlimit || isoftlimit;
1366         now_set  = dqblk->dqb_ihardlimit || dqblk->dqb_isoftlimit;
1367         if (dqblk->dqb_valid & QIF_ILIMITS && orig_set != now_set) {
1368                 down(&dquot->dq_sem);
1369                 dquot->dq_dqb.dqb_curinodes = 0;
1370                 up(&dquot->dq_sem);
1371                 rc = mds_init_slave_ilimits(obd, oqctl, orig_set);
1372                 if (rc) {
1373                         CERROR("init slave ilimits failed! (rc:%d)\n", rc);
1374                         goto revoke_out;
1375                 }
1376         }
1377
1378         orig_set = bhardlimit || bsoftlimit;
1379         now_set  = dqblk->dqb_bhardlimit || dqblk->dqb_bsoftlimit;
1380         if (dqblk->dqb_valid & QIF_BLIMITS && orig_set != now_set) {
1381                 down(&dquot->dq_sem);
1382                 dquot->dq_dqb.dqb_curspace = 0;
1383                 up(&dquot->dq_sem);
1384                 rc = mds_init_slave_blimits(obd, oqctl, orig_set);
1385                 if (rc) {
1386                         CERROR("init slave blimits failed! (rc:%d)\n", rc);
1387                         goto revoke_out;
1388                 }
1389         }
1390
1391 revoke_out:
1392         down(&mds->mds_qonoff_sem);
1393         down(&dquot->dq_sem);
1394         if (rc) {
1395                 /* cancel previous setting */
1396                 dquot->dq_dqb.dqb_ihardlimit = ihardlimit;
1397                 dquot->dq_dqb.dqb_isoftlimit = isoftlimit;
1398                 dquot->dq_dqb.dqb_bhardlimit = bhardlimit;
1399                 dquot->dq_dqb.dqb_bsoftlimit = bsoftlimit;
1400                 dquot->dq_dqb.dqb_btime = btime;
1401                 dquot->dq_dqb.dqb_itime = itime;
1402         }
1403         rc2 = fsfilt_dquot(obd, dquot, QFILE_WR_DQUOT);
1404         up(&dquot->dq_sem);
1405
1406 out:
1407         down(&dquot->dq_sem);
1408         dquot->dq_status &= ~DQ_STATUS_SET;
1409         up(&dquot->dq_sem);
1410         lustre_dqput(dquot);
1411         EXIT;
1412 out_sem:
1413         up(&mds->mds_qonoff_sem);
1414
1415         if (oqaq)
1416                 OBD_FREE_PTR(oqaq);
1417
1418         return rc ? rc : rc2;
1419 }
1420
1421 static int mds_get_space(struct obd_device *obd, struct obd_quotactl *oqctl)
1422 {
1423         struct obd_quotactl *soqc;
1424         struct lvfs_run_ctxt saved;
1425         int rc, rc1;
1426         ENTRY;
1427
1428         OBD_ALLOC_PTR(soqc);
1429         if (!soqc)
1430                 RETURN(-ENOMEM);
1431
1432         soqc->qc_cmd = Q_GETOQUOTA;
1433         soqc->qc_id = oqctl->qc_id;
1434         soqc->qc_type = oqctl->qc_type;
1435
1436         /* get block usage from OSS */
1437         soqc->qc_dqblk.dqb_curspace = 0;
1438         rc = obd_quotactl(obd->u.mds.mds_osc_exp, soqc);
1439         if (!rc || rc == -EREMOTEIO) {
1440                 oqctl->qc_dqblk.dqb_curspace = soqc->qc_dqblk.dqb_curspace;
1441                 oqctl->qc_dqblk.dqb_valid |= QIF_SPACE;
1442         }
1443
1444         /* get block/inode usage from MDS */
1445         soqc->qc_dqblk.dqb_curspace = 0;
1446         soqc->qc_dqblk.dqb_curinodes = 0;
1447         push_ctxt(&saved, &obd->obd_lvfs_ctxt, NULL);
1448         rc1 = fsfilt_quotactl(obd, obd->u.obt.obt_sb, soqc);
1449         pop_ctxt(&saved, &obd->obd_lvfs_ctxt, NULL);
1450         if (!rc1) {
1451                 oqctl->qc_dqblk.dqb_curspace += soqc->qc_dqblk.dqb_curspace;
1452                 oqctl->qc_dqblk.dqb_curinodes = soqc->qc_dqblk.dqb_curinodes;
1453                 oqctl->qc_dqblk.dqb_valid |= QIF_INODES;
1454         }
1455
1456         OBD_FREE_PTR(soqc);
1457
1458         RETURN(rc ? : rc1);
1459 }
1460
1461 int mds_get_dqblk(struct obd_device *obd, struct obd_quotactl *oqctl)
1462 {
1463         struct mds_obd *mds = &obd->u.mds;
1464         struct lustre_quota_info *qinfo = &mds->mds_quota_info;
1465         struct lustre_dquot *dquot;
1466         struct obd_dqblk *dqblk = &oqctl->qc_dqblk;
1467         int rc;
1468         ENTRY;
1469
1470         if (oqctl->qc_type != USRQUOTA &&
1471             oqctl->qc_type != GRPQUOTA)
1472                 RETURN(-EINVAL);
1473
1474         down(&mds->mds_qonoff_sem);
1475         dqblk->dqb_valid = 0;
1476         if (qinfo->qi_files[oqctl->qc_type] == NULL)
1477                 GOTO(out, rc = -ESRCH);
1478
1479         dquot = lustre_dqget(obd, qinfo, oqctl->qc_id, oqctl->qc_type);
1480         if (IS_ERR(dquot))
1481                 GOTO(out, rc = PTR_ERR(dquot));
1482
1483         down(&dquot->dq_sem);
1484         dqblk->dqb_ihardlimit = dquot->dq_dqb.dqb_ihardlimit;
1485         dqblk->dqb_isoftlimit = dquot->dq_dqb.dqb_isoftlimit;
1486         dqblk->dqb_bhardlimit = dquot->dq_dqb.dqb_bhardlimit;
1487         dqblk->dqb_bsoftlimit = dquot->dq_dqb.dqb_bsoftlimit;
1488         dqblk->dqb_btime = dquot->dq_dqb.dqb_btime;
1489         dqblk->dqb_itime = dquot->dq_dqb.dqb_itime;
1490         dqblk->dqb_valid |= QIF_LIMITS | QIF_TIMES;
1491         up(&dquot->dq_sem);
1492
1493         lustre_dqput(dquot);
1494
1495         /* the usages in admin quota file is inaccurate */
1496         dqblk->dqb_curinodes = 0;
1497         dqblk->dqb_curspace = 0;
1498         rc = mds_get_space(obd, oqctl);
1499         EXIT;
1500 out:
1501         up(&mds->mds_qonoff_sem);
1502         return rc;
1503 }
1504
1505 int mds_get_obd_quota(struct obd_device *obd, struct obd_quotactl *oqctl)
1506 {
1507         struct lvfs_run_ctxt saved;
1508         int rc;
1509         ENTRY;
1510
1511         push_ctxt(&saved, &obd->obd_lvfs_ctxt, NULL);
1512         rc = fsfilt_quotactl(obd, obd->u.obt.obt_sb, oqctl);
1513         pop_ctxt(&saved, &obd->obd_lvfs_ctxt, NULL);
1514
1515         RETURN(rc);
1516 }
1517
1518
1519 /* FIXME we only recovery block limit by now, need recovery inode
1520  * limits also after CMD involved in */
1521 static int
1522 dquot_recovery(struct obd_device *obd, unsigned int id, unsigned short type)
1523 {
1524         struct mds_obd *mds = &obd->u.mds;
1525         struct lustre_quota_info *qinfo= &mds->mds_quota_info;
1526         struct lustre_dquot *dquot;
1527         struct obd_quotactl *qctl;
1528         __u64 total_limits = 0;
1529         int rc;
1530         ENTRY;
1531
1532         OBD_ALLOC_PTR(qctl);
1533         if (qctl == NULL)
1534                 RETURN(-ENOMEM);
1535
1536         dquot = lustre_dqget(obd, qinfo, id, type);
1537         if (IS_ERR(dquot)) {
1538                 CERROR("Get dquot failed. (rc:%ld)\n", PTR_ERR(dquot));
1539                 OBD_FREE_PTR(qctl);
1540                 RETURN(PTR_ERR(dquot));
1541         }
1542
1543         down(&dquot->dq_sem);
1544
1545         /* don't recovery the dquot without limits or under setting */
1546         if (!(dquot->dq_dqb.dqb_bhardlimit || dquot->dq_dqb.dqb_bsoftlimit) ||
1547             dquot->dq_status)
1548                 GOTO(skip, rc = 0);
1549         dquot->dq_status |= DQ_STATUS_RECOVERY;
1550
1551         up(&dquot->dq_sem);
1552
1553         /* get real bhardlimit from all slaves. */
1554         qctl->qc_cmd = Q_GETOQUOTA;
1555         qctl->qc_type = type;
1556         qctl->qc_id = id;
1557         qctl->qc_stat = QUOTA_RECOVERING;
1558         rc = obd_quotactl(mds->mds_osc_exp, qctl);
1559         if (rc)
1560                 GOTO(out, rc);
1561         total_limits = qctl->qc_dqblk.dqb_bhardlimit;
1562
1563         /* get real bhardlimit from master */
1564         rc = fsfilt_quotactl(obd, obd->u.obt.obt_sb, qctl);
1565         if (rc)
1566                 GOTO(out, rc);
1567         total_limits += qctl->qc_dqblk.dqb_bhardlimit;
1568
1569         /* amend the usage of the administrative quotafile */
1570         down(&mds->mds_qonoff_sem);
1571         down(&dquot->dq_sem);
1572
1573         dquot->dq_dqb.dqb_curspace = total_limits << QUOTABLOCK_BITS;
1574
1575         rc = fsfilt_dquot(obd, dquot, QFILE_WR_DQUOT);
1576         if (rc)
1577                 CERROR("write dquot failed! (rc:%d)\n", rc);
1578
1579         up(&dquot->dq_sem);
1580         up(&mds->mds_qonoff_sem);
1581         EXIT;
1582 out:
1583         down(&dquot->dq_sem);
1584         dquot->dq_status &= ~DQ_STATUS_RECOVERY;
1585 skip:
1586         up(&dquot->dq_sem);
1587
1588         lustre_dqput(dquot);
1589         OBD_FREE_PTR(qctl);
1590         return rc;
1591 }
1592
1593 struct qmaster_recov_thread_data {
1594         struct obd_device *obd;
1595         struct completion comp;
1596 };
1597
1598 static int qmaster_recovery_main(void *arg)
1599 {
1600         struct qmaster_recov_thread_data *data = arg;
1601         struct obd_device *obd = data->obd;
1602         struct mds_obd *mds = &obd->u.mds;
1603         struct lustre_quota_info *qinfo = &mds->mds_quota_info;
1604         int rc = 0;
1605         unsigned short type;
1606         ENTRY;
1607
1608         ptlrpc_daemonize("qmaster_recovd");
1609
1610         /* for mds */
1611         class_incref(obd, "qmaster_recovd_mds", obd);
1612         /* for lov */
1613         class_incref(mds->mds_osc_obd, "qmaster_recovd_lov", mds->mds_osc_obd);
1614
1615         complete(&data->comp);
1616
1617         for (type = USRQUOTA; type < MAXQUOTAS; type++) {
1618                 struct list_head id_list;
1619                 struct dquot_id *dqid, *tmp;
1620
1621                 down(&mds->mds_qonoff_sem);
1622                 if (qinfo->qi_files[type] == NULL) {
1623                         up(&mds->mds_qonoff_sem);
1624                         continue;
1625                 }
1626                 CFS_INIT_LIST_HEAD(&id_list);
1627                 rc = fsfilt_qids(obd, qinfo->qi_files[type], NULL, type,
1628                                  &id_list);
1629                 up(&mds->mds_qonoff_sem);
1630
1631                 if (rc)
1632                         CERROR("error get ids from admin quotafile.(%d)\n", rc);
1633
1634                 list_for_each_entry_safe(dqid, tmp, &id_list, di_link) {
1635                         list_del_init(&dqid->di_link);
1636                         if (rc)
1637                                 goto free;
1638
1639                         rc = dquot_recovery(obd, dqid->di_id, type);
1640                         if (rc)
1641                                 CERROR("qmaster recovery failed! (id:%d type:%d"
1642                                        " rc:%d)\n", dqid->di_id, type, rc);
1643 free:
1644                         OBD_FREE_PTR(dqid);
1645                 }
1646         }
1647         class_decref(mds->mds_osc_obd, "qmaster_recovd_lov", mds->mds_osc_obd);
1648         class_decref(obd, "qmaster_recovd_mds", obd);
1649         RETURN(rc);
1650 }
1651
1652 int mds_quota_recovery(struct obd_device *obd)
1653 {
1654         struct mds_obd *mds = &obd->u.mds;
1655         struct qmaster_recov_thread_data data;
1656         int rc = 0;
1657         ENTRY;
1658
1659         if (unlikely(!mds->mds_quota || obd->obd_stopping))
1660                 RETURN(rc);
1661
1662         mutex_down(&obd->obd_dev_sem);
1663         if (mds->mds_lov_desc.ld_active_tgt_count != mds->mds_lov_objid_count) {
1664                 CWARN("Only %u/%u OSTs are active, abort quota recovery\n",
1665                       mds->mds_lov_desc.ld_active_tgt_count,
1666                       mds->mds_lov_objid_count);
1667                 mutex_up(&obd->obd_dev_sem);
1668                 RETURN(rc);
1669         }
1670         mutex_up(&obd->obd_dev_sem);
1671
1672         data.obd = obd;
1673         init_completion(&data.comp);
1674
1675         rc = kernel_thread(qmaster_recovery_main, &data, CLONE_VM|CLONE_FILES);
1676         if (rc < 0)
1677                 CERROR("Cannot start quota recovery thread: rc %d\n", rc);
1678
1679         wait_for_completion(&data.comp);
1680         RETURN(rc);
1681 }
1682
1683 #endif /* HAVE_QUOTA_SUPPORT */