lustre/quota/quota_interface.c

   1 /* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
   2  * vim:expandtab:shiftwidth=8:tabstop=8:
   3  *
   4  *  lustre/quota/quota_interface.c
   5  *
   6  *  Copyright (c) 2001-2005 Cluster File Systems, Inc.
   7  *
   8  *   This file is part of Lustre, http://www.lustre.org.
   9  *
  10  *   No redistribution or use is permitted outside of Cluster File Systems, Inc.
  11  *
  12  */
  13 #ifndef EXPORT_SYMTAB
  14 # define EXPORT_SYMTAB
  15 #endif
  16 #define DEBUG_SUBSYSTEM S_MDS
  17
  18 #ifdef __KERNEL__
  19 # include <linux/version.h>
  20 # include <linux/module.h>
  21 # include <linux/init.h>
  22 # include <linux/fs.h>
  23 # include <linux/jbd.h>
  24 # include <linux/ext3_fs.h>
  25 # if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,5,0))
  26 #  include <linux/smp_lock.h>
  27 #  include <linux/buffer_head.h>
  28 #  include <linux/workqueue.h>
  29 #  include <linux/mount.h>
  30 # else
  31 #  include <linux/locks.h>
  32 # endif
  33 #else /* __KERNEL__ */
  34 # include <liblustre.h>
  35 #endif
  36
  37 #include <obd_class.h>
  38 #include <lustre_mds.h>
  39 #include <lustre_dlm.h>
  40 #include <lustre_cfg.h>
  41 #include <obd_ost.h>
  42 #include <lustre_fsfilt.h>
  43 #include <lustre_quota.h>
  44 #include <lprocfs_status.h>
  45 #include "quota_internal.h"
  46
  47
  48 #ifdef __KERNEL__
  49 /* quota proc file handling functions */
  50 #ifdef LPROCFS
  51 int lprocfs_rd_bunit(char *page, char **start, off_t off, int count,
  52                      int *eof, void *data)
  53 {
  54         struct obd_device *obd = (struct obd_device *)data;
  55         LASSERT(obd != NULL);
  56
  57         return snprintf(page, count, "%lu\n",
  58                         obd->u.obt.obt_qctxt.lqc_bunit_sz);
  59 }
  60 EXPORT_SYMBOL(lprocfs_rd_bunit);
  61
  62 int lprocfs_rd_iunit(char *page, char **start, off_t off, int count,
  63                      int *eof, void *data)
  64 {
  65         struct obd_device *obd = (struct obd_device *)data;
  66         LASSERT(obd != NULL);
  67
  68         return snprintf(page, count, "%lu\n",
  69                         obd->u.obt.obt_qctxt.lqc_iunit_sz);
  70 }
  71 EXPORT_SYMBOL(lprocfs_rd_iunit);
  72
  73 int lprocfs_wr_bunit(struct file *file, const char *buffer,
  74                      unsigned long count, void *data)
  75 {
  76         struct obd_device *obd = (struct obd_device *)data;
  77         int val, rc;
  78         LASSERT(obd != NULL);
  79
  80         rc = lprocfs_write_helper(buffer, count, &val);
  81
  82         if (rc)
  83                 return rc;
  84
  85         if (val % QUOTABLOCK_SIZE ||
  86             val <= obd->u.obt.obt_qctxt.lqc_btune_sz)
  87                 return -EINVAL;
  88
  89         obd->u.obt.obt_qctxt.lqc_bunit_sz = val;
  90         return count;
  91 }
  92 EXPORT_SYMBOL(lprocfs_wr_bunit);
  93
  94 int lprocfs_wr_iunit(struct file *file, const char *buffer,
  95                      unsigned long count, void *data)
  96 {
  97         struct obd_device *obd = (struct obd_device *)data;
  98         int val, rc;
  99         LASSERT(obd != NULL);
 100
 101         rc = lprocfs_write_helper(buffer, count, &val);
 102         if (rc)
 103                 return rc;
 104
 105         if (val <= obd->u.obt.obt_qctxt.lqc_itune_sz)
 106                 return -EINVAL;
 107
 108         obd->u.obt.obt_qctxt.lqc_iunit_sz = val;
 109         return count;
 110 }
 111 EXPORT_SYMBOL(lprocfs_wr_iunit);
 112
 113 int lprocfs_rd_btune(char *page, char **start, off_t off, int count,
 114                      int *eof, void *data)
 115 {
 116         struct obd_device *obd = (struct obd_device *)data;
 117         LASSERT(obd != NULL);
 118
 119         return snprintf(page, count, "%lu\n",
 120                         obd->u.obt.obt_qctxt.lqc_btune_sz);
 121 }
 122 EXPORT_SYMBOL(lprocfs_rd_btune);
 123
 124 int lprocfs_rd_itune(char *page, char **start, off_t off, int count,
 125                      int *eof, void *data)
 126 {
 127         struct obd_device *obd = (struct obd_device *)data;
 128         LASSERT(obd != NULL);
 129
 130         return snprintf(page, count, "%lu\n",
 131                         obd->u.obt.obt_qctxt.lqc_itune_sz);
 132 }
 133 EXPORT_SYMBOL(lprocfs_rd_itune);
 134
 135 int lprocfs_wr_btune(struct file *file, const char *buffer,
 136                      unsigned long count, void *data)
 137 {
 138         struct obd_device *obd = (struct obd_device *)data;
 139         int val, rc;
 140         LASSERT(obd != NULL);
 141
 142         rc = lprocfs_write_helper(buffer, count, &val);
 143         if (rc)
 144                 return rc;
 145
 146         if (val <= QUOTABLOCK_SIZE * MIN_QLIMIT || val % QUOTABLOCK_SIZE ||
 147             val >= obd->u.obt.obt_qctxt.lqc_bunit_sz)
 148                 return -EINVAL;
 149
 150         obd->u.obt.obt_qctxt.lqc_btune_sz = val;
 151         return count;
 152 }
 153 EXPORT_SYMBOL(lprocfs_wr_btune);
 154
 155 int lprocfs_wr_itune(struct file *file, const char *buffer,
 156                      unsigned long count, void *data)
 157 {
 158         struct obd_device *obd = (struct obd_device *)data;
 159         int val, rc;
 160         LASSERT(obd != NULL);
 161
 162         rc = lprocfs_write_helper(buffer, count, &val);
 163         if (rc)
 164                 return rc;
 165
 166         if (val <= MIN_QLIMIT ||
 167             val >= obd->u.obt.obt_qctxt.lqc_iunit_sz)
 168                 return -EINVAL;
 169
 170         obd->u.obt.obt_qctxt.lqc_itune_sz = val;
 171         return count;
 172 }
 173 EXPORT_SYMBOL(lprocfs_wr_itune);
 174
 175 #define USER_QUOTA      1
 176 #define GROUP_QUOTA     2
 177
 178 #define MAX_STYPE_SIZE  4
 179 int lprocfs_rd_type(char *page, char **start, off_t off, int count,
 180                     int *eof, void *data)
 181 {
 182         struct obd_device *obd = (struct obd_device *)data;
 183         char stype[MAX_STYPE_SIZE + 1] = "";
 184         int type = obd->u.obt.obt_qctxt.lqc_atype;
 185         LASSERT(obd != NULL);
 186
 187         if (type == 0) {
 188                 strcpy(stype, "off");
 189         } else {
 190                 if (type & USER_QUOTA)
 191                         strcat(stype, "u");
 192                 if (type & GROUP_QUOTA)
 193                         strcat(stype, "g");
 194         }
 195
 196         return snprintf(page, count, "%s\n", stype);
 197 }
 198 EXPORT_SYMBOL(lprocfs_rd_type);
 199
 200 static int auto_quota_on(struct obd_device *obd, int type,
 201                          struct super_block *sb, int is_master)
 202 {
 203         struct obd_quotactl *oqctl;
 204         struct lvfs_run_ctxt saved;
 205         int rc;
 206         ENTRY;
 207
 208         LASSERT(type == USRQUOTA || type == GRPQUOTA || type == UGQUOTA);
 209
 210         /* quota already turned on */
 211         if (obd->u.obt.obt_qctxt.lqc_status)
 212                 RETURN(0);
 213
 214         OBD_ALLOC_PTR(oqctl);
 215         if (!oqctl)
 216                 RETURN(-ENOMEM);
 217
 218         oqctl->qc_type = type;
 219         oqctl->qc_cmd = Q_QUOTAON;
 220         oqctl->qc_id = QFMT_LDISKFS;
 221
 222         push_ctxt(&saved, &obd->obd_lvfs_ctxt, NULL);
 223
 224         if (!is_master)
 225                 goto local_quota;
 226
 227         /* turn on cluster wide quota */
 228         rc = mds_admin_quota_on(obd, oqctl);
 229         if (rc) {
 230                 CDEBUG(rc == -ENOENT ? D_QUOTA : D_ERROR,
 231                        "auto-enable admin quota failed. rc=%d\n", rc);
 232                 GOTO(out_pop, rc);
 233         }
 234 local_quota:
 235         /* turn on local quota */
 236         rc = fsfilt_quotactl(obd, sb, oqctl);
 237         if (rc) {
 238                 CDEBUG(rc == -ENOENT ? D_QUOTA : D_ERROR,
 239                        "auto-enable local quota failed. rc=%d\n", rc);
 240                 if (is_master)
 241                          mds_quota_off(obd, oqctl);
 242         } else {
 243                 obd->u.obt.obt_qctxt.lqc_status = 1;
 244         }
 245 out_pop:
 246         pop_ctxt(&saved, &obd->obd_lvfs_ctxt, NULL);
 247
 248         OBD_FREE_PTR(oqctl);
 249         RETURN(rc);
 250 }
 251
 252
 253 int lprocfs_wr_type(struct file *file, const char *buffer,
 254                     unsigned long count, void *data)
 255 {
 256         struct obd_device *obd = (struct obd_device *)data;
 257         struct obd_device_target *obt = &obd->u.obt;
 258         int type = 0;
 259         char stype[MAX_STYPE_SIZE + 1] = "";
 260         LASSERT(obd != NULL);
 261
 262         if (copy_from_user(stype, buffer, MAX_STYPE_SIZE))
 263                 return -EFAULT;
 264
 265         if (strchr(stype, 'u'))
 266                 type |= USER_QUOTA;
 267         if (strchr(stype, 'g'))
 268                 type |= GROUP_QUOTA;
 269
 270         obt->obt_qctxt.lqc_atype = type;
 271
 272         if (type == 0)
 273                 return count;
 274
 275         if (!strcmp(obd->obd_type->typ_name, LUSTRE_MDS_NAME))
 276                 auto_quota_on(obd, type - 1, obt->obt_sb, 1);
 277         else if (!strcmp(obd->obd_type->typ_name, LUSTRE_OST_NAME))
 278                 auto_quota_on(obd, type - 1, obt->obt_sb, 0);
 279         else
 280                 return -EFAULT;
 281
 282         return count;
 283 }
 284 EXPORT_SYMBOL(lprocfs_wr_type);
 285 #endif /* LPROCFS */
 286
 287 static int filter_quota_setup(struct obd_device *obd)
 288 {
 289         int rc = 0;
 290         struct obd_device_target *obt = &obd->u.obt;
 291         ENTRY;
 292
 293         atomic_set(&obt->obt_quotachecking, 1);
 294         rc = qctxt_init(&obt->obt_qctxt, obt->obt_sb, NULL);
 295         if (rc) {
 296                 CERROR("initialize quota context failed! (rc:%d)\n", rc);
 297                 RETURN(rc);
 298         }
 299
 300         RETURN(rc);
 301 }
 302
 303 static int filter_quota_cleanup(struct obd_device *obd)
 304 {
 305         qctxt_cleanup(&obd->u.obt.obt_qctxt, 0);
 306         return 0;
 307 }
 308
 309 static int filter_quota_setinfo(struct obd_export *exp, struct obd_device *obd)
 310 {
 311         struct obd_import *imp;
 312
 313         /* setup the quota context import */
 314         obd->u.obt.obt_qctxt.lqc_import = exp->exp_imp_reverse;
 315
 316         /* make imp's connect flags equal relative exp's connect flags
 317          * adding it to avoid the scan export list
 318          */
 319         imp = exp->exp_imp_reverse;
 320         if (imp)
 321                 imp->imp_connect_data.ocd_connect_flags |=
 322                         (exp->exp_connect_flags & OBD_CONNECT_QUOTA64);
 323
 324         /* start quota slave recovery thread. (release high limits) */
 325         qslave_start_recovery(obd, &obd->u.obt.obt_qctxt);
 326         return 0;
 327 }
 328 static int filter_quota_enforce(struct obd_device *obd, unsigned int ignore)
 329 {
 330         ENTRY;
 331
 332         if (!sb_any_quota_enabled(obd->u.obt.obt_sb))
 333                 RETURN(0);
 334
 335         if (ignore)
 336                 cap_raise(current->cap_effective, CAP_SYS_RESOURCE);
 337         else
 338                 cap_lower(current->cap_effective, CAP_SYS_RESOURCE);
 339
 340         RETURN(0);
 341 }
 342
 343 static int filter_quota_getflag(struct obd_device *obd, struct obdo *oa)
 344 {
 345         struct obd_device_target *obt = &obd->u.obt;
 346         int err, cnt, rc = 0;
 347         struct obd_quotactl *oqctl;
 348         ENTRY;
 349
 350         if (!sb_any_quota_enabled(obt->obt_sb))
 351                 RETURN(0);
 352
 353         oa->o_flags &= ~(OBD_FL_NO_USRQUOTA | OBD_FL_NO_GRPQUOTA);
 354
 355         OBD_ALLOC_PTR(oqctl);
 356         if (!oqctl) {
 357                 CERROR("Not enough memory!");
 358                 RETURN(-ENOMEM);
 359         }
 360
 361         for (cnt = 0; cnt < MAXQUOTAS; cnt++) {
 362                 memset(oqctl, 0, sizeof(*oqctl));
 363
 364                 oqctl->qc_cmd = Q_GETQUOTA;
 365                 oqctl->qc_type = cnt;
 366                 oqctl->qc_id = (cnt == USRQUOTA) ? oa->o_uid : oa->o_gid;
 367                 err = fsfilt_quotactl(obd, obt->obt_sb, oqctl);
 368                 if (err) {
 369                         if (!rc)
 370                                 rc = err;
 371                         continue;
 372                 }
 373
 374                 /* set over quota flags for a uid/gid */
 375                 oa->o_valid |= (cnt == USRQUOTA) ?
 376                                OBD_MD_FLUSRQUOTA : OBD_MD_FLGRPQUOTA;
 377                 if (oqctl->qc_dqblk.dqb_bhardlimit &&
 378                    (toqb(oqctl->qc_dqblk.dqb_curspace) >
 379                     oqctl->qc_dqblk.dqb_bhardlimit))
 380                         oa->o_flags |= (cnt == USRQUOTA) ?
 381                                 OBD_FL_NO_USRQUOTA : OBD_FL_NO_GRPQUOTA;
 382         }
 383         OBD_FREE_PTR(oqctl);
 384         RETURN(rc);
 385 }
 386
 387 static int filter_quota_acquire(struct obd_device *obd, unsigned int uid,
 388                                 unsigned int gid)
 389 {
 390         struct lustre_quota_ctxt *qctxt = &obd->u.obt.obt_qctxt;
 391         int rc;
 392         ENTRY;
 393
 394         rc = qctxt_adjust_qunit(obd, qctxt, uid, gid, 1, 1);
 395         RETURN(rc == -EAGAIN);
 396 }
 397
 398 static int mds_quota_init(void)
 399 {
 400         return lustre_dquot_init();
 401 }
 402
 403 static int mds_quota_exit(void)
 404 {
 405         lustre_dquot_exit();
 406         return 0;
 407 }
 408
 409 /* check whether the left quota of certain uid and uid can satisfy a write rpc
 410  * when need to acquire quota, return QUOTA_RET_ACQUOTA */
 411 static int filter_quota_check(struct obd_device *obd, unsigned int uid,
 412                               unsigned int gid, int npage)
 413 {
 414         struct lustre_quota_ctxt *qctxt = &obd->u.obt.obt_qctxt;
 415         int i;
 416         __u32 id[MAXQUOTAS] = { uid, gid };
 417         struct qunit_data qdata[MAXQUOTAS];
 418         int rc;
 419         ENTRY;
 420
 421         CLASSERT(MAXQUOTAS < 4);
 422         if (!sb_any_quota_enabled(qctxt->lqc_sb))
 423                 RETURN(0);
 424
 425         for (i = 0; i < MAXQUOTAS; i++) {
 426                 qdata[i].qd_id = id[i];
 427                 qdata[i].qd_flags = i;
 428                 qdata[i].qd_flags |= QUOTA_IS_BLOCK;
 429                 qdata[i].qd_count = 0;
 430
 431                 qctxt_wait_pending_dqacq(qctxt, id[i], i, 1);
 432                 rc = compute_remquota(obd, qctxt, &qdata[i]);
 433                 if (rc == QUOTA_RET_OK &&
 434                     qdata[i].qd_count < npage * CFS_PAGE_SIZE)
 435                         RETURN(QUOTA_RET_ACQUOTA);
 436         }
 437
 438         RETURN(rc);
 439 }
 440
 441 static int mds_quota_setup(struct obd_device *obd)
 442 {
 443         struct obd_device_target *obt = &obd->u.obt;
 444         struct mds_obd *mds = &obd->u.mds;
 445         int rc;
 446         ENTRY;
 447
 448         atomic_set(&obt->obt_quotachecking, 1);
 449         /* initialize quota master and quota context */
 450         sema_init(&mds->mds_qonoff_sem, 1);
 451         rc = qctxt_init(&obt->obt_qctxt, obt->obt_sb, dqacq_handler);
 452         if (rc) {
 453                 CERROR("initialize quota context failed! (rc:%d)\n", rc);
 454                 RETURN(rc);
 455         }
 456
 457         RETURN(rc);
 458 }
 459
 460 static int mds_quota_cleanup(struct obd_device *obd)
 461 {
 462         qctxt_cleanup(&obd->u.obt.obt_qctxt, 0);
 463         RETURN(0);
 464 }
 465
 466 static int mds_quota_fs_cleanup(struct obd_device *obd)
 467 {
 468         struct mds_obd *mds = &obd->u.mds;
 469         int i;
 470         ENTRY;
 471
 472         /* close admin quota files */
 473         down(&mds->mds_qonoff_sem);
 474         for (i = 0; i < MAXQUOTAS; i++) {
 475                 if (mds->mds_quota_info.qi_files[i]) {
 476                         filp_close(mds->mds_quota_info.qi_files[i], 0);
 477                         mds->mds_quota_info.qi_files[i] = NULL;
 478                 }
 479         }
 480         up(&mds->mds_qonoff_sem);
 481         RETURN(0);
 482 }
 483 #endif /* __KERNEL__ */
 484
 485 struct osc_quota_info {
 486         struct list_head        oqi_hash;       /* hash list */
 487         struct client_obd      *oqi_cli;        /* osc obd */
 488         unsigned int            oqi_id;         /* uid/gid of a file */
 489         short                   oqi_type;       /* quota type */
 490 };
 491
 492 spinlock_t qinfo_list_lock = SPIN_LOCK_UNLOCKED;
 493
 494 static struct list_head qinfo_hash[NR_DQHASH];
 495 /* SLAB cache for client quota context */
 496 cfs_mem_cache_t *qinfo_cachep = NULL;
 497
 498 static inline int hashfn(struct client_obd *cli, unsigned long id, int type)
 499                          __attribute__((__const__));
 500
 501 static inline int hashfn(struct client_obd *cli, unsigned long id, int type)
 502 {
 503         unsigned long tmp = ((unsigned long)cli>>6) ^ id;
 504         tmp = (tmp * (MAXQUOTAS - type)) % NR_DQHASH;
 505         return tmp;
 506 }
 507
 508 /* caller must hold qinfo_list_lock */
 509 static inline void insert_qinfo_hash(struct osc_quota_info *oqi)
 510 {
 511         struct list_head *head = qinfo_hash +
 512                 hashfn(oqi->oqi_cli, oqi->oqi_id, oqi->oqi_type);
 513
 514         LASSERT_SPIN_LOCKED(&qinfo_list_lock);
 515         list_add(&oqi->oqi_hash, head);
 516 }
 517
 518 /* caller must hold qinfo_list_lock */
 519 static inline void remove_qinfo_hash(struct osc_quota_info *oqi)
 520 {
 521         LASSERT_SPIN_LOCKED(&qinfo_list_lock);
 522         list_del_init(&oqi->oqi_hash);
 523 }
 524
 525 /* caller must hold qinfo_list_lock */
 526 static inline struct osc_quota_info *find_qinfo(struct client_obd *cli,
 527                                                 unsigned int id, int type)
 528 {
 529         unsigned int hashent = hashfn(cli, id, type);
 530         struct osc_quota_info *oqi;
 531
 532         LASSERT_SPIN_LOCKED(&qinfo_list_lock);
 533         list_for_each_entry(oqi, &qinfo_hash[hashent], oqi_hash) {
 534                 if (oqi->oqi_cli == cli &&
 535                     oqi->oqi_id == id && oqi->oqi_type == type)
 536                         return oqi;
 537         }
 538         return NULL;
 539 }
 540
 541 static struct osc_quota_info *alloc_qinfo(struct client_obd *cli,
 542                                           unsigned int id, int type)
 543 {
 544         struct osc_quota_info *oqi;
 545         ENTRY;
 546
 547         OBD_SLAB_ALLOC(oqi, qinfo_cachep, CFS_ALLOC_STD, sizeof(*oqi));
 548         if(!oqi)
 549                 RETURN(NULL);
 550
 551         INIT_LIST_HEAD(&oqi->oqi_hash);
 552         oqi->oqi_cli = cli;
 553         oqi->oqi_id = id;
 554         oqi->oqi_type = type;
 555
 556         RETURN(oqi);
 557 }
 558
 559 static void free_qinfo(struct osc_quota_info *oqi)
 560 {
 561         OBD_SLAB_FREE(oqi, qinfo_cachep, sizeof(*oqi));
 562 }
 563
 564 int osc_quota_chkdq(struct client_obd *cli,
 565                     unsigned int uid, unsigned int gid)
 566 {
 567         unsigned int id;
 568         int cnt, rc = QUOTA_OK;
 569         ENTRY;
 570
 571         spin_lock(&qinfo_list_lock);
 572         for (cnt = 0; cnt < MAXQUOTAS; cnt++) {
 573                 struct osc_quota_info *oqi = NULL;
 574
 575                 id = (cnt == USRQUOTA) ? uid : gid;
 576                 oqi = find_qinfo(cli, id, cnt);
 577                 if (oqi) {
 578                         rc = NO_QUOTA;
 579                         break;
 580                 }
 581         }
 582         spin_unlock(&qinfo_list_lock);
 583
 584         RETURN(rc);
 585 }
 586
 587 int osc_quota_setdq(struct client_obd *cli,
 588                     unsigned int uid, unsigned int gid,
 589                     obd_flag valid, obd_flag flags)
 590 {
 591         unsigned int id;
 592         obd_flag noquota;
 593         int cnt, rc = 0;
 594         ENTRY;
 595
 596
 597         for (cnt = 0; cnt < MAXQUOTAS; cnt++) {
 598                 struct osc_quota_info *oqi, *old;
 599
 600                 if (!(valid & ((cnt == USRQUOTA) ?
 601                     OBD_MD_FLUSRQUOTA : OBD_MD_FLGRPQUOTA)))
 602                         continue;
 603
 604                 id = (cnt == USRQUOTA) ? uid : gid;
 605                 noquota = (cnt == USRQUOTA) ?
 606                     (flags & OBD_FL_NO_USRQUOTA) : (flags & OBD_FL_NO_GRPQUOTA);
 607
 608                 oqi = alloc_qinfo(cli, id, cnt);
 609                 if (oqi) {
 610                         spin_lock(&qinfo_list_lock);
 611
 612                         old = find_qinfo(cli, id, cnt);
 613                         if (old && !noquota)
 614                                 remove_qinfo_hash(old);
 615                         else if (!old && noquota)
 616                                 insert_qinfo_hash(oqi);
 617
 618                         spin_unlock(&qinfo_list_lock);
 619
 620                         if (old || !noquota)
 621                                 free_qinfo(oqi);
 622                         if (old && !noquota)
 623                                 free_qinfo(old);
 624                 } else {
 625                         CERROR("not enough mem!\n");
 626                         rc = -ENOMEM;
 627                         break;
 628                 }
 629         }
 630
 631         RETURN(rc);
 632 }
 633
 634 int osc_quota_cleanup(struct obd_device *obd)
 635 {
 636         struct client_obd *cli = &obd->u.cli;
 637         struct osc_quota_info *oqi, *n;
 638         int i;
 639         ENTRY;
 640
 641         spin_lock(&qinfo_list_lock);
 642         for (i = 0; i < NR_DQHASH; i++) {
 643                 list_for_each_entry_safe(oqi, n, &qinfo_hash[i], oqi_hash) {
 644                         if (oqi->oqi_cli != cli)
 645                                 continue;
 646                         remove_qinfo_hash(oqi);
 647                         free_qinfo(oqi);
 648                 }
 649         }
 650         spin_unlock(&qinfo_list_lock);
 651
 652         RETURN(0);
 653 }
 654
 655 int osc_quota_init(void)
 656 {
 657         int i;
 658         ENTRY;
 659
 660         LASSERT(qinfo_cachep == NULL);
 661         qinfo_cachep = cfs_mem_cache_create("osc_quota_info",
 662                                          sizeof(struct osc_quota_info),
 663                                          0, 0);
 664         if (!qinfo_cachep)
 665                 RETURN(-ENOMEM);
 666
 667         for (i = 0; i < NR_DQHASH; i++)
 668                 INIT_LIST_HEAD(qinfo_hash + i);
 669
 670         RETURN(0);
 671 }
 672
 673 int osc_quota_exit(void)
 674 {
 675         struct osc_quota_info *oqi, *n;
 676         int i, rc;
 677         ENTRY;
 678
 679         spin_lock(&qinfo_list_lock);
 680         for (i = 0; i < NR_DQHASH; i++) {
 681                 list_for_each_entry_safe(oqi, n, &qinfo_hash[i], oqi_hash) {
 682                         remove_qinfo_hash(oqi);
 683                         free_qinfo(oqi);
 684                 }
 685         }
 686         spin_unlock(&qinfo_list_lock);
 687
 688         rc = cfs_mem_cache_destroy(qinfo_cachep);
 689         LASSERTF(rc == 0, "couldn't destory qinfo_cachep slab\n");
 690         qinfo_cachep = NULL;
 691
 692         RETURN(0);
 693 }
 694
 695 #ifdef __KERNEL__
 696 quota_interface_t mds_quota_interface = {
 697         .quota_init     = mds_quota_init,
 698         .quota_exit     = mds_quota_exit,
 699         .quota_setup    = mds_quota_setup,
 700         .quota_cleanup  = mds_quota_cleanup,
 701         .quota_check    = target_quota_check,
 702         .quota_ctl      = mds_quota_ctl,
 703         .quota_fs_cleanup       =mds_quota_fs_cleanup,
 704         .quota_recovery = mds_quota_recovery,
 705         .quota_adjust   = mds_quota_adjust,
 706 };
 707
 708 quota_interface_t filter_quota_interface = {
 709         .quota_setup    = filter_quota_setup,
 710         .quota_cleanup  = filter_quota_cleanup,
 711         .quota_check    = target_quota_check,
 712         .quota_ctl      = filter_quota_ctl,
 713         .quota_setinfo  = filter_quota_setinfo,
 714         .quota_enforce  = filter_quota_enforce,
 715         .quota_getflag  = filter_quota_getflag,
 716         .quota_acquire  = filter_quota_acquire,
 717         .quota_adjust   = filter_quota_adjust,
 718         .quota_chkquota = filter_quota_check,
 719 };
 720 #endif /* __KERNEL__ */
 721
 722 quota_interface_t mdc_quota_interface = {
 723         .quota_ctl      = client_quota_ctl,
 724         .quota_check    = client_quota_check,
 725         .quota_poll_check = client_quota_poll_check,
 726 };
 727
 728 quota_interface_t osc_quota_interface = {
 729         .quota_ctl      = client_quota_ctl,
 730         .quota_check    = client_quota_check,
 731         .quota_poll_check = client_quota_poll_check,
 732         .quota_init     = osc_quota_init,
 733         .quota_exit     = osc_quota_exit,
 734         .quota_chkdq    = osc_quota_chkdq,
 735         .quota_setdq    = osc_quota_setdq,
 736         .quota_cleanup  = osc_quota_cleanup,
 737 };
 738
 739 quota_interface_t lov_quota_interface = {
 740         .quota_check    = lov_quota_check,
 741         .quota_ctl      = lov_quota_ctl,
 742 };
 743
 744 #ifdef __KERNEL__
 745 static int __init init_lustre_quota(void)
 746 {
 747         int rc = qunit_cache_init();
 748         if (rc)
 749                 return rc;
 750         PORTAL_SYMBOL_REGISTER(filter_quota_interface);
 751         PORTAL_SYMBOL_REGISTER(mds_quota_interface);
 752         PORTAL_SYMBOL_REGISTER(mdc_quota_interface);
 753         PORTAL_SYMBOL_REGISTER(osc_quota_interface);
 754         PORTAL_SYMBOL_REGISTER(lov_quota_interface);
 755         return 0;
 756 }
 757
 758 static void /*__exit*/ exit_lustre_quota(void)
 759 {
 760         PORTAL_SYMBOL_UNREGISTER(filter_quota_interface);
 761         PORTAL_SYMBOL_UNREGISTER(mds_quota_interface);
 762         PORTAL_SYMBOL_UNREGISTER(mdc_quota_interface);
 763         PORTAL_SYMBOL_UNREGISTER(osc_quota_interface);
 764         PORTAL_SYMBOL_UNREGISTER(lov_quota_interface);
 765
 766         qunit_cache_cleanup();
 767 }
 768
 769 MODULE_AUTHOR("Cluster File Systems, Inc. <info@clusterfs.com>");
 770 MODULE_DESCRIPTION("Lustre Quota");
 771 MODULE_LICENSE("GPL");
 772
 773 cfs_module(lquota, "1.0.0", init_lustre_quota, exit_lustre_quota);
 774
 775 EXPORT_SYMBOL(mds_quota_interface);
 776 EXPORT_SYMBOL(filter_quota_interface);
 777 EXPORT_SYMBOL(mdc_quota_interface);
 778 EXPORT_SYMBOL(osc_quota_interface);
 779 EXPORT_SYMBOL(lov_quota_interface);
 780 #endif /* __KERNEL */