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  * 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
  37 #ifndef EXPORT_SYMTAB
  38 # define EXPORT_SYMTAB
  39 #endif
  40 #define DEBUG_SUBSYSTEM S_MDS
  41
  42 #ifdef __KERNEL__
  43 # include <linux/version.h>
  44 # include <linux/module.h>
  45 # include <linux/init.h>
  46 # include <linux/fs.h>
  47 # include <linux/jbd.h>
  48 # include <linux/ext3_fs.h>
  49 # include <linux/smp_lock.h>
  50 # include <linux/buffer_head.h>
  51 # include <linux/workqueue.h>
  52 # include <linux/mount.h>
  53 #else /* __KERNEL__ */
  54 # include <liblustre.h>
  55 #endif
  56
  57 #include <obd_class.h>
  58 #include <lustre_mds.h>
  59 #include <lustre_dlm.h>
  60 #include <lustre_cfg.h>
  61 #include <obd_ost.h>
  62 #include <lustre_fsfilt.h>
  63 #include <lustre_quota.h>
  64 #include <lprocfs_status.h>
  65 #include "quota_internal.h"
  66
  67
  68 #ifdef __KERNEL__
  69 /* quota proc file handling functions */
  70 #ifdef LPROCFS
  71 int lprocfs_rd_bunit(char *page, char **start, off_t off, int count,
  72                      int *eof, void *data)
  73 {
  74         struct obd_device *obd = (struct obd_device *)data;
  75         LASSERT(obd != NULL);
  76
  77         return snprintf(page, count, "%lu\n",
  78                         obd->u.obt.obt_qctxt.lqc_bunit_sz);
  79 }
  80 EXPORT_SYMBOL(lprocfs_rd_bunit);
  81
  82 int lprocfs_rd_iunit(char *page, char **start, off_t off, int count,
  83                      int *eof, void *data)
  84 {
  85         struct obd_device *obd = (struct obd_device *)data;
  86         LASSERT(obd != NULL);
  87
  88         return snprintf(page, count, "%lu\n",
  89                         obd->u.obt.obt_qctxt.lqc_iunit_sz);
  90 }
  91 EXPORT_SYMBOL(lprocfs_rd_iunit);
  92
  93 int lprocfs_wr_bunit(struct file *file, const char *buffer,
  94                      unsigned long count, void *data)
  95 {
  96         struct obd_device *obd = (struct obd_device *)data;
  97         int val, rc;
  98         LASSERT(obd != NULL);
  99
 100         rc = lprocfs_write_helper(buffer, count, &val);
 101
 102         if (rc)
 103                 return rc;
 104
 105         if (val % QUOTABLOCK_SIZE ||
 106             val <= obd->u.obt.obt_qctxt.lqc_btune_sz)
 107                 return -EINVAL;
 108
 109         obd->u.obt.obt_qctxt.lqc_bunit_sz = val;
 110         return count;
 111 }
 112 EXPORT_SYMBOL(lprocfs_wr_bunit);
 113
 114 int lprocfs_wr_iunit(struct file *file, const char *buffer,
 115                      unsigned long count, void *data)
 116 {
 117         struct obd_device *obd = (struct obd_device *)data;
 118         int val, rc;
 119         LASSERT(obd != NULL);
 120
 121         rc = lprocfs_write_helper(buffer, count, &val);
 122         if (rc)
 123                 return rc;
 124
 125         if (val <= obd->u.obt.obt_qctxt.lqc_itune_sz)
 126                 return -EINVAL;
 127
 128         obd->u.obt.obt_qctxt.lqc_iunit_sz = val;
 129         return count;
 130 }
 131 EXPORT_SYMBOL(lprocfs_wr_iunit);
 132
 133 int lprocfs_rd_btune(char *page, char **start, off_t off, int count,
 134                      int *eof, void *data)
 135 {
 136         struct obd_device *obd = (struct obd_device *)data;
 137         LASSERT(obd != NULL);
 138
 139         return snprintf(page, count, "%lu\n",
 140                         obd->u.obt.obt_qctxt.lqc_btune_sz);
 141 }
 142 EXPORT_SYMBOL(lprocfs_rd_btune);
 143
 144 int lprocfs_rd_itune(char *page, char **start, off_t off, int count,
 145                      int *eof, void *data)
 146 {
 147         struct obd_device *obd = (struct obd_device *)data;
 148         LASSERT(obd != NULL);
 149
 150         return snprintf(page, count, "%lu\n",
 151                         obd->u.obt.obt_qctxt.lqc_itune_sz);
 152 }
 153 EXPORT_SYMBOL(lprocfs_rd_itune);
 154
 155 int lprocfs_wr_btune(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 <= QUOTABLOCK_SIZE * MIN_QLIMIT || val % QUOTABLOCK_SIZE ||
 167             val >= obd->u.obt.obt_qctxt.lqc_bunit_sz)
 168                 return -EINVAL;
 169
 170         obd->u.obt.obt_qctxt.lqc_btune_sz = val;
 171         return count;
 172 }
 173 EXPORT_SYMBOL(lprocfs_wr_btune);
 174
 175 int lprocfs_wr_itune(struct file *file, const char *buffer,
 176                      unsigned long count, void *data)
 177 {
 178         struct obd_device *obd = (struct obd_device *)data;
 179         int val, rc;
 180         LASSERT(obd != NULL);
 181
 182         rc = lprocfs_write_helper(buffer, count, &val);
 183         if (rc)
 184                 return rc;
 185
 186         if (val <= MIN_QLIMIT ||
 187             val >= obd->u.obt.obt_qctxt.lqc_iunit_sz)
 188                 return -EINVAL;
 189
 190         obd->u.obt.obt_qctxt.lqc_itune_sz = val;
 191         return count;
 192 }
 193 EXPORT_SYMBOL(lprocfs_wr_itune);
 194
 195 #define USER_QUOTA      1
 196 #define GROUP_QUOTA     2
 197
 198 #define MAX_STYPE_SIZE  4
 199 int lprocfs_rd_type(char *page, char **start, off_t off, int count,
 200                     int *eof, void *data)
 201 {
 202         struct obd_device *obd = (struct obd_device *)data;
 203         char stype[MAX_STYPE_SIZE + 1] = "";
 204         int type = obd->u.obt.obt_qctxt.lqc_atype;
 205         LASSERT(obd != NULL);
 206
 207         if (type == 0) {
 208                 strcpy(stype, "off");
 209         } else {
 210                 if (type & USER_QUOTA)
 211                         strcat(stype, "u");
 212                 if (type & GROUP_QUOTA)
 213                         strcat(stype, "g");
 214         }
 215
 216         return snprintf(page, count, "%s\n", stype);
 217 }
 218 EXPORT_SYMBOL(lprocfs_rd_type);
 219
 220 static int auto_quota_on(struct obd_device *obd, int type,
 221                          struct super_block *sb, int is_master)
 222 {
 223         struct obd_quotactl *oqctl;
 224         struct lvfs_run_ctxt saved;
 225         int rc;
 226         ENTRY;
 227
 228         LASSERT(type == USRQUOTA || type == GRPQUOTA || type == UGQUOTA);
 229
 230         /* quota already turned on */
 231         if (obd->u.obt.obt_qctxt.lqc_status)
 232                 RETURN(0);
 233
 234         OBD_ALLOC_PTR(oqctl);
 235         if (!oqctl)
 236                 RETURN(-ENOMEM);
 237
 238         oqctl->qc_type = type;
 239         oqctl->qc_cmd = Q_QUOTAON;
 240         oqctl->qc_id = QFMT_LDISKFS;
 241
 242         push_ctxt(&saved, &obd->obd_lvfs_ctxt, NULL);
 243
 244         if (!is_master)
 245                 goto local_quota;
 246
 247         /* turn on cluster wide quota */
 248         rc = mds_admin_quota_on(obd, oqctl);
 249         if (rc) {
 250                 CDEBUG(rc == -ENOENT ? D_QUOTA : D_ERROR,
 251                        "auto-enable admin quota failed. rc=%d\n", rc);
 252                 GOTO(out_pop, rc);
 253         }
 254 local_quota:
 255         /* turn on local quota */
 256         rc = fsfilt_quotactl(obd, sb, oqctl);
 257         if (rc) {
 258                 CDEBUG(rc == -ENOENT ? D_QUOTA : D_ERROR,
 259                        "auto-enable local quota failed. rc=%d\n", rc);
 260                 if (is_master)
 261                          mds_quota_off(obd, oqctl);
 262         } else {
 263                 obd->u.obt.obt_qctxt.lqc_status = 1;
 264         }
 265 out_pop:
 266         pop_ctxt(&saved, &obd->obd_lvfs_ctxt, NULL);
 267
 268         OBD_FREE_PTR(oqctl);
 269         RETURN(rc);
 270 }
 271
 272
 273 int lprocfs_wr_type(struct file *file, const char *buffer,
 274                     unsigned long count, void *data)
 275 {
 276         struct obd_device *obd = (struct obd_device *)data;
 277         struct obd_device_target *obt = &obd->u.obt;
 278         int type = 0;
 279         char stype[MAX_STYPE_SIZE + 1] = "";
 280         LASSERT(obd != NULL);
 281
 282         if (copy_from_user(stype, buffer, MAX_STYPE_SIZE))
 283                 return -EFAULT;
 284
 285         if (strchr(stype, 'u'))
 286                 type |= USER_QUOTA;
 287         if (strchr(stype, 'g'))
 288                 type |= GROUP_QUOTA;
 289
 290         obt->obt_qctxt.lqc_atype = type;
 291
 292         if (type == 0)
 293                 return count;
 294
 295         if (!strcmp(obd->obd_type->typ_name, LUSTRE_MDS_NAME))
 296                 auto_quota_on(obd, type - 1, obt->obt_sb, 1);
 297         else if (!strcmp(obd->obd_type->typ_name, LUSTRE_OST_NAME))
 298                 auto_quota_on(obd, type - 1, obt->obt_sb, 0);
 299         else
 300                 return -EFAULT;
 301
 302         return count;
 303 }
 304 EXPORT_SYMBOL(lprocfs_wr_type);
 305 #endif /* LPROCFS */
 306
 307 static int filter_quota_setup(struct obd_device *obd)
 308 {
 309         int rc = 0;
 310         struct obd_device_target *obt = &obd->u.obt;
 311         ENTRY;
 312
 313         atomic_set(&obt->obt_quotachecking, 1);
 314         rc = qctxt_init(&obt->obt_qctxt, obt->obt_sb, NULL);
 315         if (rc) {
 316                 CERROR("initialize quota context failed! (rc:%d)\n", rc);
 317                 RETURN(rc);
 318         }
 319
 320         RETURN(rc);
 321 }
 322
 323 static int filter_quota_cleanup(struct obd_device *obd)
 324 {
 325         qctxt_cleanup(&obd->u.obt.obt_qctxt, 0);
 326         return 0;
 327 }
 328
 329 static int filter_quota_setinfo(struct obd_export *exp, struct obd_device *obd)
 330 {
 331         struct obd_import *imp;
 332
 333         /* setup the quota context import */
 334         obd->u.obt.obt_qctxt.lqc_import = exp->exp_imp_reverse;
 335
 336         /* make imp's connect flags equal relative exp's connect flags
 337          * adding it to avoid the scan export list
 338          */
 339         imp = exp->exp_imp_reverse;
 340         if (imp)
 341                 imp->imp_connect_data.ocd_connect_flags |=
 342                         (exp->exp_connect_flags & OBD_CONNECT_QUOTA64);
 343
 344         /* start quota slave recovery thread. (release high limits) */
 345         qslave_start_recovery(obd, &obd->u.obt.obt_qctxt);
 346         return 0;
 347 }
 348 static int filter_quota_enforce(struct obd_device *obd, unsigned int ignore)
 349 {
 350         ENTRY;
 351
 352         if (!sb_any_quota_enabled(obd->u.obt.obt_sb))
 353                 RETURN(0);
 354
 355         if (ignore)
 356                 cap_raise(current->cap_effective, CAP_SYS_RESOURCE);
 357         else
 358                 cap_lower(current->cap_effective, CAP_SYS_RESOURCE);
 359
 360         RETURN(0);
 361 }
 362
 363 static int filter_quota_getflag(struct obd_device *obd, struct obdo *oa)
 364 {
 365         struct obd_device_target *obt = &obd->u.obt;
 366         int err, cnt, rc = 0;
 367         struct obd_quotactl *oqctl;
 368         ENTRY;
 369
 370         if (!sb_any_quota_enabled(obt->obt_sb))
 371                 RETURN(0);
 372
 373         oa->o_flags &= ~(OBD_FL_NO_USRQUOTA | OBD_FL_NO_GRPQUOTA);
 374
 375         OBD_ALLOC_PTR(oqctl);
 376         if (!oqctl) {
 377                 CERROR("Not enough memory!");
 378                 RETURN(-ENOMEM);
 379         }
 380
 381         for (cnt = 0; cnt < MAXQUOTAS; cnt++) {
 382                 memset(oqctl, 0, sizeof(*oqctl));
 383
 384                 oqctl->qc_cmd = Q_GETQUOTA;
 385                 oqctl->qc_type = cnt;
 386                 oqctl->qc_id = (cnt == USRQUOTA) ? oa->o_uid : oa->o_gid;
 387                 err = fsfilt_quotactl(obd, obt->obt_sb, oqctl);
 388                 if (err) {
 389                         if (!rc)
 390                                 rc = err;
 391                         continue;
 392                 }
 393
 394                 /* set over quota flags for a uid/gid */
 395                 oa->o_valid |= (cnt == USRQUOTA) ?
 396                                OBD_MD_FLUSRQUOTA : OBD_MD_FLGRPQUOTA;
 397                 if (oqctl->qc_dqblk.dqb_bhardlimit &&
 398                    (toqb(oqctl->qc_dqblk.dqb_curspace) >
 399                     oqctl->qc_dqblk.dqb_bhardlimit))
 400                         oa->o_flags |= (cnt == USRQUOTA) ?
 401                                 OBD_FL_NO_USRQUOTA : OBD_FL_NO_GRPQUOTA;
 402         }
 403         OBD_FREE_PTR(oqctl);
 404         RETURN(rc);
 405 }
 406
 407 static int filter_quota_acquire(struct obd_device *obd, unsigned int uid,
 408                                 unsigned int gid)
 409 {
 410         struct lustre_quota_ctxt *qctxt = &obd->u.obt.obt_qctxt;
 411         int rc;
 412         ENTRY;
 413
 414         rc = qctxt_adjust_qunit(obd, qctxt, uid, gid, 1, 1);
 415         RETURN(rc == -EAGAIN);
 416 }
 417
 418 static int mds_quota_init(void)
 419 {
 420         return lustre_dquot_init();
 421 }
 422
 423 static int mds_quota_exit(void)
 424 {
 425         lustre_dquot_exit();
 426         return 0;
 427 }
 428
 429 /* check whether the left quota of certain uid and uid can satisfy a write rpc
 430  * when need to acquire quota, return QUOTA_RET_ACQUOTA */
 431 static int filter_quota_check(struct obd_device *obd, unsigned int uid,
 432                               unsigned int gid, int npage)
 433 {
 434         struct lustre_quota_ctxt *qctxt = &obd->u.obt.obt_qctxt;
 435         int i;
 436         __u32 id[MAXQUOTAS] = { uid, gid };
 437         struct qunit_data qdata[MAXQUOTAS];
 438         int rc;
 439         ENTRY;
 440
 441         CLASSERT(MAXQUOTAS < 4);
 442         if (!sb_any_quota_enabled(qctxt->lqc_sb))
 443                 RETURN(0);
 444
 445         for (i = 0; i < MAXQUOTAS; i++) {
 446                 qdata[i].qd_id = id[i];
 447                 qdata[i].qd_flags = i;
 448                 qdata[i].qd_flags |= QUOTA_IS_BLOCK;
 449                 qdata[i].qd_count = 0;
 450
 451                 qctxt_wait_pending_dqacq(qctxt, id[i], i, 1);
 452                 rc = compute_remquota(obd, qctxt, &qdata[i]);
 453                 if (rc == QUOTA_RET_OK &&
 454                     qdata[i].qd_count < npage * CFS_PAGE_SIZE)
 455                         RETURN(QUOTA_RET_ACQUOTA);
 456         }
 457
 458         RETURN(rc);
 459 }
 460
 461 static int mds_quota_setup(struct obd_device *obd)
 462 {
 463         struct obd_device_target *obt = &obd->u.obt;
 464         struct mds_obd *mds = &obd->u.mds;
 465         int rc;
 466         ENTRY;
 467
 468         atomic_set(&obt->obt_quotachecking, 1);
 469         /* initialize quota master and quota context */
 470         sema_init(&mds->mds_qonoff_sem, 1);
 471         rc = qctxt_init(&obt->obt_qctxt, obt->obt_sb, dqacq_handler);
 472         if (rc) {
 473                 CERROR("initialize quota context failed! (rc:%d)\n", rc);
 474                 RETURN(rc);
 475         }
 476
 477         RETURN(rc);
 478 }
 479
 480 static int mds_quota_cleanup(struct obd_device *obd)
 481 {
 482         qctxt_cleanup(&obd->u.obt.obt_qctxt, 0);
 483         RETURN(0);
 484 }
 485
 486 static int mds_quota_fs_cleanup(struct obd_device *obd)
 487 {
 488         struct mds_obd *mds = &obd->u.mds;
 489         int i;
 490         ENTRY;
 491
 492         /* close admin quota files */
 493         down(&mds->mds_qonoff_sem);
 494         for (i = 0; i < MAXQUOTAS; i++) {
 495                 if (mds->mds_quota_info.qi_files[i]) {
 496                         filp_close(mds->mds_quota_info.qi_files[i], 0);
 497                         mds->mds_quota_info.qi_files[i] = NULL;
 498                 }
 499         }
 500         up(&mds->mds_qonoff_sem);
 501         RETURN(0);
 502 }
 503 #endif /* __KERNEL__ */
 504
 505 struct osc_quota_info {
 506         struct list_head        oqi_hash;       /* hash list */
 507         struct client_obd      *oqi_cli;        /* osc obd */
 508         unsigned int            oqi_id;         /* uid/gid of a file */
 509         short                   oqi_type;       /* quota type */
 510 };
 511
 512 spinlock_t qinfo_list_lock = SPIN_LOCK_UNLOCKED;
 513
 514 static struct list_head qinfo_hash[NR_DQHASH];
 515 /* SLAB cache for client quota context */
 516 cfs_mem_cache_t *qinfo_cachep = NULL;
 517
 518 static inline int hashfn(struct client_obd *cli, unsigned long id, int type)
 519                          __attribute__((__const__));
 520
 521 static inline int hashfn(struct client_obd *cli, unsigned long id, int type)
 522 {
 523         unsigned long tmp = ((unsigned long)cli>>6) ^ id;
 524         tmp = (tmp * (MAXQUOTAS - type)) % NR_DQHASH;
 525         return tmp;
 526 }
 527
 528 /* caller must hold qinfo_list_lock */
 529 static inline void insert_qinfo_hash(struct osc_quota_info *oqi)
 530 {
 531         struct list_head *head = qinfo_hash +
 532                 hashfn(oqi->oqi_cli, oqi->oqi_id, oqi->oqi_type);
 533
 534         LASSERT_SPIN_LOCKED(&qinfo_list_lock);
 535         list_add(&oqi->oqi_hash, head);
 536 }
 537
 538 /* caller must hold qinfo_list_lock */
 539 static inline void remove_qinfo_hash(struct osc_quota_info *oqi)
 540 {
 541         LASSERT_SPIN_LOCKED(&qinfo_list_lock);
 542         list_del_init(&oqi->oqi_hash);
 543 }
 544
 545 /* caller must hold qinfo_list_lock */
 546 static inline struct osc_quota_info *find_qinfo(struct client_obd *cli,
 547                                                 unsigned int id, int type)
 548 {
 549         unsigned int hashent = hashfn(cli, id, type);
 550         struct osc_quota_info *oqi;
 551
 552         LASSERT_SPIN_LOCKED(&qinfo_list_lock);
 553         list_for_each_entry(oqi, &qinfo_hash[hashent], oqi_hash) {
 554                 if (oqi->oqi_cli == cli &&
 555                     oqi->oqi_id == id && oqi->oqi_type == type)
 556                         return oqi;
 557         }
 558         return NULL;
 559 }
 560
 561 static struct osc_quota_info *alloc_qinfo(struct client_obd *cli,
 562                                           unsigned int id, int type)
 563 {
 564         struct osc_quota_info *oqi;
 565         ENTRY;
 566
 567         OBD_SLAB_ALLOC(oqi, qinfo_cachep, CFS_ALLOC_STD, sizeof(*oqi));
 568         if(!oqi)
 569                 RETURN(NULL);
 570
 571         CFS_INIT_LIST_HEAD(&oqi->oqi_hash);
 572         oqi->oqi_cli = cli;
 573         oqi->oqi_id = id;
 574         oqi->oqi_type = type;
 575
 576         RETURN(oqi);
 577 }
 578
 579 static void free_qinfo(struct osc_quota_info *oqi)
 580 {
 581         OBD_SLAB_FREE(oqi, qinfo_cachep, sizeof(*oqi));
 582 }
 583
 584 int osc_quota_chkdq(struct client_obd *cli,
 585                     unsigned int uid, unsigned int gid)
 586 {
 587         unsigned int id;
 588         int cnt, rc = QUOTA_OK;
 589         ENTRY;
 590
 591         spin_lock(&qinfo_list_lock);
 592         for (cnt = 0; cnt < MAXQUOTAS; cnt++) {
 593                 struct osc_quota_info *oqi = NULL;
 594
 595                 id = (cnt == USRQUOTA) ? uid : gid;
 596                 oqi = find_qinfo(cli, id, cnt);
 597                 if (oqi) {
 598                         rc = NO_QUOTA;
 599                         break;
 600                 }
 601         }
 602         spin_unlock(&qinfo_list_lock);
 603
 604         RETURN(rc);
 605 }
 606
 607 int osc_quota_setdq(struct client_obd *cli,
 608                     unsigned int uid, unsigned int gid,
 609                     obd_flag valid, obd_flag flags)
 610 {
 611         unsigned int id;
 612         obd_flag noquota;
 613         int cnt, rc = 0;
 614         ENTRY;
 615
 616
 617         for (cnt = 0; cnt < MAXQUOTAS; cnt++) {
 618                 struct osc_quota_info *oqi, *old;
 619
 620                 if (!(valid & ((cnt == USRQUOTA) ?
 621                     OBD_MD_FLUSRQUOTA : OBD_MD_FLGRPQUOTA)))
 622                         continue;
 623
 624                 id = (cnt == USRQUOTA) ? uid : gid;
 625                 noquota = (cnt == USRQUOTA) ?
 626                     (flags & OBD_FL_NO_USRQUOTA) : (flags & OBD_FL_NO_GRPQUOTA);
 627
 628                 oqi = alloc_qinfo(cli, id, cnt);
 629                 if (oqi) {
 630                         spin_lock(&qinfo_list_lock);
 631
 632                         old = find_qinfo(cli, id, cnt);
 633                         if (old && !noquota)
 634                                 remove_qinfo_hash(old);
 635                         else if (!old && noquota)
 636                                 insert_qinfo_hash(oqi);
 637
 638                         spin_unlock(&qinfo_list_lock);
 639
 640                         if (old || !noquota)
 641                                 free_qinfo(oqi);
 642                         if (old && !noquota)
 643                                 free_qinfo(old);
 644                 } else {
 645                         CERROR("not enough mem!\n");
 646                         rc = -ENOMEM;
 647                         break;
 648                 }
 649         }
 650
 651         RETURN(rc);
 652 }
 653
 654 int osc_quota_cleanup(struct obd_device *obd)
 655 {
 656         struct client_obd *cli = &obd->u.cli;
 657         struct osc_quota_info *oqi, *n;
 658         int i;
 659         ENTRY;
 660
 661         spin_lock(&qinfo_list_lock);
 662         for (i = 0; i < NR_DQHASH; i++) {
 663                 list_for_each_entry_safe(oqi, n, &qinfo_hash[i], oqi_hash) {
 664                         if (oqi->oqi_cli != cli)
 665                                 continue;
 666                         remove_qinfo_hash(oqi);
 667                         free_qinfo(oqi);
 668                 }
 669         }
 670         spin_unlock(&qinfo_list_lock);
 671
 672         RETURN(0);
 673 }
 674
 675 int osc_quota_init(void)
 676 {
 677         int i;
 678         ENTRY;
 679
 680         LASSERT(qinfo_cachep == NULL);
 681         qinfo_cachep = cfs_mem_cache_create("osc_quota_info",
 682                                             sizeof(struct osc_quota_info),
 683                                             0, 0);
 684         if (!qinfo_cachep)
 685                 RETURN(-ENOMEM);
 686
 687         for (i = 0; i < NR_DQHASH; i++)
 688                 CFS_INIT_LIST_HEAD(qinfo_hash + i);
 689
 690         RETURN(0);
 691 }
 692
 693 int osc_quota_exit(void)
 694 {
 695         struct osc_quota_info *oqi, *n;
 696         int i, rc;
 697         ENTRY;
 698
 699         spin_lock(&qinfo_list_lock);
 700         for (i = 0; i < NR_DQHASH; i++) {
 701                 list_for_each_entry_safe(oqi, n, &qinfo_hash[i], oqi_hash) {
 702                         remove_qinfo_hash(oqi);
 703                         free_qinfo(oqi);
 704                 }
 705         }
 706         spin_unlock(&qinfo_list_lock);
 707
 708         rc = cfs_mem_cache_destroy(qinfo_cachep);
 709         LASSERTF(rc == 0, "couldn't destory qinfo_cachep slab\n");
 710         qinfo_cachep = NULL;
 711
 712         RETURN(0);
 713 }
 714
 715 #ifdef __KERNEL__
 716 quota_interface_t mds_quota_interface = {
 717         .quota_init     = mds_quota_init,
 718         .quota_exit     = mds_quota_exit,
 719         .quota_setup    = mds_quota_setup,
 720         .quota_cleanup  = mds_quota_cleanup,
 721         .quota_check    = target_quota_check,
 722         .quota_ctl      = mds_quota_ctl,
 723         .quota_fs_cleanup       =mds_quota_fs_cleanup,
 724         .quota_recovery = mds_quota_recovery,
 725         .quota_adjust   = mds_quota_adjust,
 726 };
 727
 728 quota_interface_t filter_quota_interface = {
 729         .quota_setup    = filter_quota_setup,
 730         .quota_cleanup  = filter_quota_cleanup,
 731         .quota_check    = target_quota_check,
 732         .quota_ctl      = filter_quota_ctl,
 733         .quota_setinfo  = filter_quota_setinfo,
 734         .quota_enforce  = filter_quota_enforce,
 735         .quota_getflag  = filter_quota_getflag,
 736         .quota_acquire  = filter_quota_acquire,
 737         .quota_adjust   = filter_quota_adjust,
 738         .quota_chkquota = filter_quota_check,
 739 };
 740 #endif /* __KERNEL__ */
 741
 742 quota_interface_t mdc_quota_interface = {
 743         .quota_ctl      = client_quota_ctl,
 744         .quota_check    = client_quota_check,
 745         .quota_poll_check = client_quota_poll_check,
 746 };
 747
 748 quota_interface_t osc_quota_interface = {
 749         .quota_ctl      = client_quota_ctl,
 750         .quota_check    = client_quota_check,
 751         .quota_poll_check = client_quota_poll_check,
 752         .quota_init     = osc_quota_init,
 753         .quota_exit     = osc_quota_exit,
 754         .quota_chkdq    = osc_quota_chkdq,
 755         .quota_setdq    = osc_quota_setdq,
 756         .quota_cleanup  = osc_quota_cleanup,
 757 };
 758
 759 quota_interface_t lov_quota_interface = {
 760         .quota_check    = lov_quota_check,
 761         .quota_ctl      = lov_quota_ctl,
 762 };
 763
 764 #ifdef __KERNEL__
 765 static int __init init_lustre_quota(void)
 766 {
 767         int rc = qunit_cache_init();
 768         if (rc)
 769                 return rc;
 770         PORTAL_SYMBOL_REGISTER(filter_quota_interface);
 771         PORTAL_SYMBOL_REGISTER(mds_quota_interface);
 772         PORTAL_SYMBOL_REGISTER(mdc_quota_interface);
 773         PORTAL_SYMBOL_REGISTER(osc_quota_interface);
 774         PORTAL_SYMBOL_REGISTER(lov_quota_interface);
 775         return 0;
 776 }
 777
 778 static void /*__exit*/ exit_lustre_quota(void)
 779 {
 780         PORTAL_SYMBOL_UNREGISTER(filter_quota_interface);
 781         PORTAL_SYMBOL_UNREGISTER(mds_quota_interface);
 782         PORTAL_SYMBOL_UNREGISTER(mdc_quota_interface);
 783         PORTAL_SYMBOL_UNREGISTER(osc_quota_interface);
 784         PORTAL_SYMBOL_UNREGISTER(lov_quota_interface);
 785
 786         qunit_cache_cleanup();
 787 }
 788
 789 MODULE_AUTHOR("Sun Microsystems, Inc. <http://www.lustre.org/>");
 790 MODULE_DESCRIPTION("Lustre Quota");
 791 MODULE_LICENSE("GPL");
 792
 793 cfs_module(lquota, "1.0.0", init_lustre_quota, exit_lustre_quota);
 794
 795 EXPORT_SYMBOL(mds_quota_interface);
 796 EXPORT_SYMBOL(filter_quota_interface);
 797 EXPORT_SYMBOL(mdc_quota_interface);
 798 EXPORT_SYMBOL(osc_quota_interface);
 799 EXPORT_SYMBOL(lov_quota_interface);
 800 #endif /* __KERNEL */