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