lustre/lod/lod_lov.c

   1 /*
   2  * GPL HEADER START
   3  *
   4  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License version 2 only,
   8  * as published by the Free Software Foundation.
   9
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  * GNU General Public License version 2 for more details.  A copy is
  14  * included in the COPYING file that accompanied this code.
  15
  16  * You should have received a copy of the GNU General Public License
  17  * along with this program; if not, write to the Free Software
  18  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
  19  *
  20  * GPL HEADER END
  21  */
  22 /*
  23  * Copyright  2009 Sun Microsystems, Inc. All rights reserved
  24  * Use is subject to license terms.
  25  *
  26  * Copyright (c) 2012, 2013, Intel Corporation.
  27  */
  28 /*
  29  * lustre/lod/lod_lov.c
  30  *
  31  * Author: Alex Zhuravlev <alexey.zhuravlev@intel.com>
  32  */
  33
  34 #define DEBUG_SUBSYSTEM S_MDS
  35
  36 #include <obd_class.h>
  37 #include <obd_lov.h>
  38 #include <lustre_lfsck.h>
  39
  40 #include "lod_internal.h"
  41
  42 /*
  43  * Keep a refcount of lod->ltd_tgts usage to prevent racing with
  44  * addition/deletion. Any function that expects lov_tgts to remain stationary
  45  * must take a ref.
  46  *
  47  * \param lod - is the lod device from which we want to grab a reference
  48  */
  49 void lod_getref(struct lod_tgt_descs *ltd)
  50 {
  51         down_read(&ltd->ltd_rw_sem);
  52         mutex_lock(&ltd->ltd_mutex);
  53         ltd->ltd_refcount++;
  54         mutex_unlock(&ltd->ltd_mutex);
  55 }
  56
  57 /*
  58  * Companion of lod_getref() to release a reference on the lod table.
  59  * If this is the last reference and the ost entry was scheduled for deletion,
  60  * the descriptor is removed from the array.
  61  *
  62  * \param lod - is the lod device from which we release a reference
  63  */
  64 void lod_putref(struct lod_device *lod, struct lod_tgt_descs *ltd)
  65 {
  66         mutex_lock(&ltd->ltd_mutex);
  67         ltd->ltd_refcount--;
  68         if (ltd->ltd_refcount == 0 && ltd->ltd_death_row) {
  69                 struct lod_tgt_desc *tgt_desc, *tmp;
  70                 int                  idx;
  71                 CFS_LIST_HEAD(kill);
  72
  73                 CDEBUG(D_CONFIG, "destroying %d ltd desc\n",
  74                        ltd->ltd_death_row);
  75
  76                 cfs_foreach_bit(ltd->ltd_tgt_bitmap, idx) {
  77                         tgt_desc = LTD_TGT(ltd, idx);
  78                         LASSERT(tgt_desc);
  79
  80                         if (!tgt_desc->ltd_reap)
  81                                 continue;
  82
  83                         cfs_list_add(&tgt_desc->ltd_kill, &kill);
  84                         LTD_TGT(ltd, idx) = NULL;
  85                         /*FIXME: only support ost pool for now */
  86                         if (ltd == &lod->lod_ost_descs) {
  87                                 lod_ost_pool_remove(&lod->lod_pool_info, idx);
  88                                 if (tgt_desc->ltd_active)
  89                                         lod->lod_desc.ld_active_tgt_count--;
  90                         }
  91                         ltd->ltd_tgtnr--;
  92                         cfs_bitmap_clear(ltd->ltd_tgt_bitmap, idx);
  93                         ltd->ltd_death_row--;
  94                 }
  95                 mutex_unlock(&ltd->ltd_mutex);
  96                 up_read(&ltd->ltd_rw_sem);
  97
  98                 cfs_list_for_each_entry_safe(tgt_desc, tmp, &kill, ltd_kill) {
  99                         int rc;
 100                         cfs_list_del(&tgt_desc->ltd_kill);
 101                         if (ltd == &lod->lod_ost_descs) {
 102                                 /* remove from QoS structures */
 103                                 rc = qos_del_tgt(lod, tgt_desc);
 104                                 if (rc)
 105                                         CERROR("%s: qos_del_tgt(%s) failed:"
 106                                                "rc = %d\n",
 107                                                lod2obd(lod)->obd_name,
 108                                               obd_uuid2str(&tgt_desc->ltd_uuid),
 109                                                rc);
 110                         }
 111                         rc = obd_disconnect(tgt_desc->ltd_exp);
 112                         if (rc)
 113                                 CERROR("%s: failed to disconnect %s: rc = %d\n",
 114                                        lod2obd(lod)->obd_name,
 115                                        obd_uuid2str(&tgt_desc->ltd_uuid), rc);
 116                         OBD_FREE_PTR(tgt_desc);
 117                 }
 118         } else {
 119                 mutex_unlock(&ltd->ltd_mutex);
 120                 up_read(&ltd->ltd_rw_sem);
 121         }
 122 }
 123
 124 static int ltd_bitmap_resize(struct lod_tgt_descs *ltd, __u32 newsize)
 125 {
 126         cfs_bitmap_t *new_bitmap, *old_bitmap = NULL;
 127         int           rc = 0;
 128         ENTRY;
 129
 130         /* grab write reference on the lod. Relocating the array requires
 131          * exclusive access */
 132
 133         down_write(&ltd->ltd_rw_sem);
 134         if (newsize <= ltd->ltd_tgts_size)
 135                 /* someone else has already resize the array */
 136                 GOTO(out, rc = 0);
 137
 138         /* allocate new bitmap */
 139         new_bitmap = CFS_ALLOCATE_BITMAP(newsize);
 140         if (!new_bitmap)
 141                 GOTO(out, rc = -ENOMEM);
 142
 143         if (ltd->ltd_tgts_size > 0) {
 144                 /* the bitmap already exists, we need
 145                  * to copy data from old one */
 146                 cfs_bitmap_copy(new_bitmap, ltd->ltd_tgt_bitmap);
 147                 old_bitmap = ltd->ltd_tgt_bitmap;
 148         }
 149
 150         ltd->ltd_tgts_size  = newsize;
 151         ltd->ltd_tgt_bitmap = new_bitmap;
 152
 153         if (old_bitmap)
 154                 CFS_FREE_BITMAP(old_bitmap);
 155
 156         CDEBUG(D_CONFIG, "tgt size: %d\n", ltd->ltd_tgts_size);
 157
 158         EXIT;
 159 out:
 160         up_write(&ltd->ltd_rw_sem);
 161         return rc;
 162 }
 163
 164 /*
 165  * Connect LOD to a new OSP and add it to the device table.
 166  *
 167  * \param env - is the environment passed by the caller
 168  * \param lod - is the LOD device to be connected to the new OSP
 169  * \param osp - is the name of OSP device name about to be added
 170  * \param index - is the OSP index
 171  * \param gen - is the generation number
 172  * \param tgt_index - is the group of the OSP.
 173  * \param type - is the type of device (mdc or osc)
 174  */
 175 int lod_add_device(const struct lu_env *env, struct lod_device *lod,
 176                    char *osp, unsigned index, unsigned gen, int tgt_index,
 177                    char *type, int active)
 178 {
 179         struct obd_connect_data *data = NULL;
 180         struct obd_export       *exp = NULL;
 181         struct obd_device       *obd;
 182         struct lu_device        *ldev;
 183         struct dt_device        *d;
 184         int                      rc;
 185         struct lod_tgt_desc     *tgt_desc;
 186         struct lod_tgt_descs    *ltd;
 187         struct obd_uuid         obd_uuid;
 188         bool                    for_ost;
 189         ENTRY;
 190
 191         CDEBUG(D_CONFIG, "osp:%s idx:%d gen:%d\n", osp, index, gen);
 192
 193         if (gen <= 0) {
 194                 CERROR("request to add OBD %s with invalid generation: %d\n",
 195                        osp, gen);
 196                 RETURN(-EINVAL);
 197         }
 198
 199         obd_str2uuid(&obd_uuid, osp);
 200
 201         obd = class_find_client_obd(&obd_uuid, LUSTRE_OSP_NAME,
 202                                 &lod->lod_dt_dev.dd_lu_dev.ld_obd->obd_uuid);
 203         if (obd == NULL) {
 204                 CERROR("can't find %s device\n", osp);
 205                 RETURN(-EINVAL);
 206         }
 207
 208         OBD_ALLOC_PTR(data);
 209         if (data == NULL)
 210                 RETURN(-ENOMEM);
 211
 212         data->ocd_connect_flags = OBD_CONNECT_INDEX | OBD_CONNECT_VERSION;
 213         data->ocd_version = LUSTRE_VERSION_CODE;
 214         data->ocd_index = index;
 215
 216         if (strcmp(LUSTRE_OSC_NAME, type) == 0) {
 217                 for_ost = true;
 218                 data->ocd_connect_flags |= OBD_CONNECT_AT |
 219                                            OBD_CONNECT_FULL20 |
 220                                            OBD_CONNECT_INDEX |
 221 #ifdef HAVE_LRU_RESIZE_SUPPORT
 222                                            OBD_CONNECT_LRU_RESIZE |
 223 #endif
 224                                            OBD_CONNECT_MDS |
 225                                            OBD_CONNECT_OSS_CAPA |
 226                                            OBD_CONNECT_REQPORTAL |
 227                                            OBD_CONNECT_SKIP_ORPHAN |
 228                                            OBD_CONNECT_FID |
 229                                            OBD_CONNECT_LVB_TYPE |
 230                                            OBD_CONNECT_VERSION |
 231                                            OBD_CONNECT_PINGLESS |
 232                                            OBD_CONNECT_LFSCK;
 233
 234                 data->ocd_group = tgt_index;
 235                 ltd = &lod->lod_ost_descs;
 236         } else {
 237                 struct obd_import *imp = obd->u.cli.cl_import;
 238
 239                 for_ost = false;
 240                 data->ocd_ibits_known = MDS_INODELOCK_UPDATE;
 241                 data->ocd_connect_flags |= OBD_CONNECT_ACL |
 242                                            OBD_CONNECT_MDS_CAPA |
 243                                            OBD_CONNECT_OSS_CAPA |
 244                                            OBD_CONNECT_IBITS |
 245                                            OBD_CONNECT_MDS_MDS |
 246                                            OBD_CONNECT_FID |
 247                                            OBD_CONNECT_AT |
 248                                            OBD_CONNECT_FULL20 |
 249                                            OBD_CONNECT_LFSCK;
 250                 /* XXX set MDS-MDS flags, remove this when running this
 251                  * on client*/
 252                 data->ocd_connect_flags |= OBD_CONNECT_MDS_MDS;
 253                 spin_lock(&imp->imp_lock);
 254                 imp->imp_server_timeout = 1;
 255                 spin_unlock(&imp->imp_lock);
 256                 imp->imp_client->cli_request_portal = OUT_PORTAL;
 257                 CDEBUG(D_OTHER, "%s: Set 'mds' portal and timeout\n",
 258                       obd->obd_name);
 259                 ltd = &lod->lod_mdt_descs;
 260         }
 261
 262         rc = obd_connect(env, &exp, obd, &obd->obd_uuid, data, NULL);
 263         OBD_FREE_PTR(data);
 264         if (rc) {
 265                 CERROR("%s: cannot connect to next dev %s (%d)\n",
 266                        obd->obd_name, osp, rc);
 267                 GOTO(out_free, rc);
 268         }
 269
 270         LASSERT(obd->obd_lu_dev);
 271         LASSERT(obd->obd_lu_dev->ld_site == lod->lod_dt_dev.dd_lu_dev.ld_site);
 272
 273         ldev = obd->obd_lu_dev;
 274         d = lu2dt_dev(ldev);
 275
 276         /* Allocate ost descriptor and fill it */
 277         OBD_ALLOC_PTR(tgt_desc);
 278         if (!tgt_desc)
 279                 GOTO(out_conn, rc = -ENOMEM);
 280
 281         tgt_desc->ltd_tgt    = d;
 282         tgt_desc->ltd_exp    = exp;
 283         tgt_desc->ltd_uuid   = obd->u.cli.cl_target_uuid;
 284         tgt_desc->ltd_gen    = gen;
 285         tgt_desc->ltd_index  = index;
 286         tgt_desc->ltd_active = active;
 287
 288         lod_getref(ltd);
 289         if (index >= ltd->ltd_tgts_size) {
 290                 /* we have to increase the size of the lod_osts array */
 291                 __u32  newsize;
 292
 293                 newsize = max(ltd->ltd_tgts_size, (__u32)2);
 294                 while (newsize < index + 1)
 295                         newsize = newsize << 1;
 296
 297                 /* lod_bitmap_resize() needs lod_rw_sem
 298                  * which we hold with th reference */
 299                 lod_putref(lod, ltd);
 300
 301                 rc = ltd_bitmap_resize(ltd, newsize);
 302                 if (rc)
 303                         GOTO(out_desc, rc);
 304
 305                 lod_getref(ltd);
 306         }
 307
 308         mutex_lock(&ltd->ltd_mutex);
 309         if (cfs_bitmap_check(ltd->ltd_tgt_bitmap, index)) {
 310                 CERROR("%s: device %d is registered already\n", obd->obd_name,
 311                        index);
 312                 GOTO(out_mutex, rc = -EEXIST);
 313         }
 314
 315         if (ltd->ltd_tgt_idx[index / TGT_PTRS_PER_BLOCK] == NULL) {
 316                 OBD_ALLOC_PTR(ltd->ltd_tgt_idx[index / TGT_PTRS_PER_BLOCK]);
 317                 if (ltd->ltd_tgt_idx[index / TGT_PTRS_PER_BLOCK] == NULL) {
 318                         CERROR("can't allocate index to add %s\n",
 319                                obd->obd_name);
 320                         GOTO(out_mutex, rc = -ENOMEM);
 321                 }
 322         }
 323
 324         if (!strcmp(LUSTRE_OSC_NAME, type)) {
 325                 /* pool and qos are not supported for MDS stack yet */
 326                 rc = lod_ost_pool_add(&lod->lod_pool_info, index,
 327                                       lod->lod_osts_size);
 328                 if (rc) {
 329                         CERROR("%s: can't set up pool, failed with %d\n",
 330                                obd->obd_name, rc);
 331                         GOTO(out_mutex, rc);
 332                 }
 333
 334                 rc = qos_add_tgt(lod, tgt_desc);
 335                 if (rc) {
 336                         CERROR("%s: qos_add_tgt failed with %d\n",
 337                                 obd->obd_name, rc);
 338                         GOTO(out_pool, rc);
 339                 }
 340
 341                 /* The new OST is now a full citizen */
 342                 if (index >= lod->lod_desc.ld_tgt_count)
 343                         lod->lod_desc.ld_tgt_count = index + 1;
 344                 if (active)
 345                         lod->lod_desc.ld_active_tgt_count++;
 346         }
 347
 348         LTD_TGT(ltd, index) = tgt_desc;
 349         cfs_bitmap_set(ltd->ltd_tgt_bitmap, index);
 350         ltd->ltd_tgtnr++;
 351         mutex_unlock(&ltd->ltd_mutex);
 352         lod_putref(lod, ltd);
 353         if (lod->lod_recovery_completed)
 354                 ldev->ld_ops->ldo_recovery_complete(env, ldev);
 355
 356         rc = lfsck_add_target(env, lod->lod_child, d, exp, index, for_ost);
 357         if (rc != 0)
 358                 CERROR("Fail to add LFSCK target: name = %s, type = %s, "
 359                        "index = %u, rc = %d\n", osp, type, index, rc);
 360
 361         RETURN(rc);
 362
 363 out_pool:
 364         lod_ost_pool_remove(&lod->lod_pool_info, index);
 365 out_mutex:
 366         mutex_unlock(&ltd->ltd_mutex);
 367         lod_putref(lod, ltd);
 368 out_desc:
 369         OBD_FREE_PTR(tgt_desc);
 370 out_conn:
 371         obd_disconnect(exp);
 372 out_free:
 373         return rc;
 374 }
 375
 376 /*
 377  * helper function to schedule OST removal from the device table
 378  */
 379 static void __lod_del_device(const struct lu_env *env, struct lod_device *lod,
 380                              struct lod_tgt_descs *ltd, unsigned idx,
 381                              bool for_ost)
 382 {
 383         LASSERT(LTD_TGT(ltd, idx));
 384
 385         lfsck_del_target(env, lod->lod_child, LTD_TGT(ltd, idx)->ltd_tgt,
 386                          idx, for_ost);
 387
 388         if (LTD_TGT(ltd, idx)->ltd_reap == 0) {
 389                 LTD_TGT(ltd, idx)->ltd_reap = 1;
 390                 ltd->ltd_death_row++;
 391         }
 392 }
 393
 394 int lod_fini_tgt(const struct lu_env *env, struct lod_device *lod,
 395                  struct lod_tgt_descs *ltd, bool for_ost)
 396 {
 397         int idx;
 398
 399         if (ltd->ltd_tgts_size <= 0)
 400                 return 0;
 401         lod_getref(ltd);
 402         mutex_lock(&ltd->ltd_mutex);
 403         cfs_foreach_bit(ltd->ltd_tgt_bitmap, idx)
 404                 __lod_del_device(env, lod, ltd, idx, for_ost);
 405         mutex_unlock(&ltd->ltd_mutex);
 406         lod_putref(lod, ltd);
 407         CFS_FREE_BITMAP(ltd->ltd_tgt_bitmap);
 408         for (idx = 0; idx < TGT_PTRS; idx++) {
 409                 if (ltd->ltd_tgt_idx[idx])
 410                         OBD_FREE_PTR(ltd->ltd_tgt_idx[idx]);
 411         }
 412         ltd->ltd_tgts_size = 0;
 413         return 0;
 414 }
 415
 416 /*
 417  * Add support for administratively disabled OST (through the MGS).
 418  * Schedule a target for deletion.  Disconnection and real removal from the
 419  * table takes place in lod_putref() once the last table user release its
 420  * reference.
 421  *
 422  * \param env - is the environment passed by the caller
 423  * \param lod - is the lod device currently connected to the OSP about to be
 424  *              removed
 425  * \param osp - is the name of OSP device about to be removed
 426  * \param idx - is the OSP index
 427  * \param gen - is the generation number, not used currently
 428  */
 429 int lod_del_device(const struct lu_env *env, struct lod_device *lod,
 430                    struct lod_tgt_descs *ltd, char *osp, unsigned idx,
 431                    unsigned gen, bool for_ost)
 432 {
 433         struct obd_device *obd;
 434         int                rc = 0;
 435         struct obd_uuid    uuid;
 436         ENTRY;
 437
 438         CDEBUG(D_CONFIG, "osp:%s idx:%d gen:%d\n", osp, idx, gen);
 439
 440         obd_str2uuid(&uuid, osp);
 441
 442         obd = class_find_client_obd(&uuid, LUSTRE_OSP_NAME,
 443                                    &lod->lod_dt_dev.dd_lu_dev.ld_obd->obd_uuid);
 444         if (obd == NULL) {
 445                 CERROR("can't find %s device\n", osp);
 446                 RETURN(-EINVAL);
 447         }
 448
 449         if (gen <= 0) {
 450                 CERROR("%s: request to remove OBD %s with invalid generation %d"
 451                        "\n", obd->obd_name, osp, gen);
 452                 RETURN(-EINVAL);
 453         }
 454
 455         obd_str2uuid(&uuid,  osp);
 456
 457         lod_getref(ltd);
 458         mutex_lock(&ltd->ltd_mutex);
 459         /* check that the index is allocated in the bitmap */
 460         if (!cfs_bitmap_check(ltd->ltd_tgt_bitmap, idx) ||
 461             !LTD_TGT(ltd, idx)) {
 462                 CERROR("%s: device %d is not set up\n", obd->obd_name, idx);
 463                 GOTO(out, rc = -EINVAL);
 464         }
 465
 466         /* check that the UUID matches */
 467         if (!obd_uuid_equals(&uuid, &LTD_TGT(ltd, idx)->ltd_uuid)) {
 468                 CERROR("%s: LOD target UUID %s at index %d does not match %s\n",
 469                        obd->obd_name, obd_uuid2str(&LTD_TGT(ltd,idx)->ltd_uuid),
 470                        idx, osp);
 471                 GOTO(out, rc = -EINVAL);
 472         }
 473
 474         __lod_del_device(env, lod, ltd, idx, for_ost);
 475         EXIT;
 476 out:
 477         mutex_unlock(&ltd->ltd_mutex);
 478         lod_putref(lod, ltd);
 479         return(rc);
 480 }
 481
 482 int lod_ea_store_resize(struct lod_thread_info *info, int size)
 483 {
 484         int round = size_roundup_power2(size);
 485
 486         LASSERT(round <=
 487                 lov_mds_md_size(LOV_MAX_STRIPE_COUNT, LOV_MAGIC_V3));
 488         if (info->lti_ea_store) {
 489                 LASSERT(info->lti_ea_store_size);
 490                 LASSERT(info->lti_ea_store_size < round);
 491                 CDEBUG(D_INFO, "EA store size %d is not enough, need %d\n",
 492                        info->lti_ea_store_size, round);
 493                 OBD_FREE_LARGE(info->lti_ea_store, info->lti_ea_store_size);
 494                 info->lti_ea_store = NULL;
 495                 info->lti_ea_store_size = 0;
 496         }
 497
 498         OBD_ALLOC_LARGE(info->lti_ea_store, round);
 499         if (info->lti_ea_store == NULL)
 500                 RETURN(-ENOMEM);
 501         info->lti_ea_store_size = round;
 502         RETURN(0);
 503 }
 504
 505 /*
 506  * generate and write LOV EA for given striped object
 507  */
 508 int lod_generate_and_set_lovea(const struct lu_env *env,
 509                                struct lod_object *lo, struct thandle *th)
 510 {
 511         struct lod_thread_info  *info = lod_env_info(env);
 512         struct dt_object        *next = dt_object_child(&lo->ldo_obj);
 513         const struct lu_fid     *fid  = lu_object_fid(&lo->ldo_obj.do_lu);
 514         struct lov_mds_md_v1    *lmm;
 515         struct lov_ost_data_v1  *objs;
 516         __u32                    magic;
 517         int                      i, rc, lmm_size;
 518         int                      cplen = 0;
 519         ENTRY;
 520
 521         LASSERT(lo);
 522
 523         magic = lo->ldo_pool != NULL ? LOV_MAGIC_V3 : LOV_MAGIC_V1;
 524         lmm_size = lov_mds_md_size(lo->ldo_stripenr, magic);
 525         if (info->lti_ea_store_size < lmm_size) {
 526                 rc = lod_ea_store_resize(info, lmm_size);
 527                 if (rc)
 528                         RETURN(rc);
 529         }
 530
 531         if (lo->ldo_pattern == 0) /* default striping */
 532                 lo->ldo_pattern = LOV_PATTERN_RAID0;
 533
 534         lmm = info->lti_ea_store;
 535
 536         lmm->lmm_magic = cpu_to_le32(magic);
 537         lmm->lmm_pattern = cpu_to_le32(lo->ldo_pattern);
 538         fid_to_lmm_oi(fid, &lmm->lmm_oi);
 539         if (OBD_FAIL_CHECK(OBD_FAIL_LFSCK_BAD_LMMOI))
 540                 lmm->lmm_oi.oi.oi_id++;
 541         lmm_oi_cpu_to_le(&lmm->lmm_oi, &lmm->lmm_oi);
 542         lmm->lmm_stripe_size = cpu_to_le32(lo->ldo_stripe_size);
 543         lmm->lmm_stripe_count = cpu_to_le16(lo->ldo_stripenr);
 544         if (lo->ldo_pattern & LOV_PATTERN_F_RELEASED)
 545                 lmm->lmm_stripe_count = cpu_to_le16(lo->ldo_released_stripenr);
 546         lmm->lmm_layout_gen = 0;
 547         if (magic == LOV_MAGIC_V1) {
 548                 objs = &lmm->lmm_objects[0];
 549         } else {
 550                 struct lov_mds_md_v3 *v3 = (struct lov_mds_md_v3 *) lmm;
 551                 cplen = strlcpy(v3->lmm_pool_name, lo->ldo_pool,
 552                                 sizeof(v3->lmm_pool_name));
 553                 if (cplen >= sizeof(v3->lmm_pool_name))
 554                         RETURN(-E2BIG);
 555                 objs = &v3->lmm_objects[0];
 556         }
 557
 558         for (i = 0; i < lo->ldo_stripenr; i++) {
 559                 struct lu_fid           *fid    = &info->lti_fid;
 560                 struct lod_device       *lod;
 561                 __u32                   index;
 562                 int                     type    = LU_SEQ_RANGE_OST;
 563
 564                 lod = lu2lod_dev(lo->ldo_obj.do_lu.lo_dev);
 565                 LASSERT(lo->ldo_stripe[i]);
 566
 567                 *fid = *lu_object_fid(&lo->ldo_stripe[i]->do_lu);
 568                 if (OBD_FAIL_CHECK(OBD_FAIL_LFSCK_MULTIPLE_REF)) {
 569                         if (cfs_fail_val == 0)
 570                                 cfs_fail_val = fid->f_oid;
 571                         else
 572                                 fid->f_oid = cfs_fail_val;
 573                 }
 574
 575                 rc = fid_to_ostid(fid, &info->lti_ostid);
 576                 LASSERT(rc == 0);
 577
 578                 ostid_cpu_to_le(&info->lti_ostid, &objs[i].l_ost_oi);
 579                 objs[i].l_ost_gen    = cpu_to_le32(0);
 580                 rc = lod_fld_lookup(env, lod, fid, &index, &type);
 581                 if (rc < 0) {
 582                         CERROR("%s: Can not locate "DFID": rc = %d\n",
 583                                lod2obd(lod)->obd_name, PFID(fid), rc);
 584                         lod_object_free_striping(env, lo);
 585                         RETURN(rc);
 586                 }
 587                 objs[i].l_ost_idx = cpu_to_le32(index);
 588         }
 589
 590         info->lti_buf.lb_buf = lmm;
 591         info->lti_buf.lb_len = lmm_size;
 592         rc = dt_xattr_set(env, next, &info->lti_buf, XATTR_NAME_LOV, 0,
 593                           th, BYPASS_CAPA);
 594
 595         RETURN(rc);
 596 }
 597
 598 int lod_get_ea(const struct lu_env *env, struct lod_object *lo,
 599                const char *name)
 600 {
 601         struct lod_thread_info  *info = lod_env_info(env);
 602         struct dt_object        *next = dt_object_child(&lo->ldo_obj);
 603         int                     rc;
 604         ENTRY;
 605
 606         LASSERT(info);
 607
 608         if (unlikely(info->lti_ea_store == NULL)) {
 609                 /* just to enter in allocation block below */
 610                 rc = -ERANGE;
 611         } else {
 612 repeat:
 613                 info->lti_buf.lb_buf = info->lti_ea_store;
 614                 info->lti_buf.lb_len = info->lti_ea_store_size;
 615                 rc = dt_xattr_get(env, next, &info->lti_buf, name, BYPASS_CAPA);
 616         }
 617
 618         /* if object is not striped or inaccessible */
 619         if (rc == -ENODATA || rc == -ENOENT)
 620                 RETURN(0);
 621
 622         if (rc == -ERANGE) {
 623                 /* EA doesn't fit, reallocate new buffer */
 624                 rc = dt_xattr_get(env, next, &LU_BUF_NULL, name,
 625                                   BYPASS_CAPA);
 626                 if (rc == -ENODATA || rc == -ENOENT)
 627                         RETURN(0);
 628                 else if (rc < 0)
 629                         RETURN(rc);
 630
 631                 LASSERT(rc > 0);
 632                 rc = lod_ea_store_resize(info, rc);
 633                 if (rc)
 634                         RETURN(rc);
 635                 goto repeat;
 636         }
 637
 638         RETURN(rc);
 639 }
 640
 641 int lod_store_def_striping(const struct lu_env *env, struct dt_object *dt,
 642                            struct thandle *th)
 643 {
 644         struct lod_thread_info  *info = lod_env_info(env);
 645         struct lod_object       *lo = lod_dt_obj(dt);
 646         struct dt_object        *next = dt_object_child(dt);
 647         struct lov_user_md_v3   *v3;
 648         int                      rc;
 649         ENTRY;
 650
 651         if (S_ISDIR(dt->do_lu.lo_header->loh_attr))
 652                 RETURN(-ENOTDIR);
 653         /*
 654          * store striping defaults into new directory
 655          * used to implement defaults inheritance
 656          */
 657
 658         /* probably nothing to inherite */
 659         if (lo->ldo_striping_cached == 0)
 660                 RETURN(0);
 661
 662         if (LOVEA_DELETE_VALUES(lo->ldo_def_stripe_size, lo->ldo_def_stripenr,
 663                                 lo->ldo_def_stripe_offset))
 664                 RETURN(0);
 665
 666         v3 = info->lti_ea_store;
 667         if (info->lti_ea_store_size < sizeof(*v3)) {
 668                 rc = lod_ea_store_resize(info, sizeof(*v3));
 669                 if (rc != 0)
 670                         RETURN(rc);
 671                 v3 = info->lti_ea_store;
 672         }
 673         memset(v3, 0, sizeof(*v3));
 674         v3->lmm_magic = cpu_to_le32(LOV_USER_MAGIC_V3);
 675         v3->lmm_stripe_count = cpu_to_le16(lo->ldo_def_stripenr);
 676         v3->lmm_stripe_offset = cpu_to_le16(lo->ldo_def_stripe_offset);
 677         v3->lmm_stripe_size = cpu_to_le32(lo->ldo_def_stripe_size);
 678         if (lo->ldo_pool)
 679                 strncpy(v3->lmm_pool_name, lo->ldo_pool,
 680                         sizeof(v3->lmm_pool_name));
 681         info->lti_buf.lb_buf = v3;
 682         info->lti_buf.lb_len = sizeof(*v3);
 683         rc = dt_xattr_set(env, next, &info->lti_buf, XATTR_NAME_LOV, 0, th,
 684                         BYPASS_CAPA);
 685
 686         RETURN(rc);
 687 }
 688
 689 static int validate_lod_and_idx(struct lod_device *md, int idx)
 690 {
 691         if (unlikely(idx >= md->lod_ost_descs.ltd_tgts_size ||
 692                      !cfs_bitmap_check(md->lod_ost_bitmap, idx))) {
 693                 CERROR("%s: bad idx: %d of %d\n", lod2obd(md)->obd_name, idx,
 694                        md->lod_ost_descs.ltd_tgts_size);
 695                 return -EINVAL;
 696         }
 697
 698         if (unlikely(OST_TGT(md, idx) == NULL)) {
 699                 CERROR("%s: bad lod_tgt_desc for idx: %d\n",
 700                        lod2obd(md)->obd_name, idx);
 701                 return -EINVAL;
 702         }
 703
 704         if (unlikely(OST_TGT(md, idx)->ltd_ost == NULL)) {
 705                 CERROR("%s: invalid lod device, for idx: %d\n",
 706                        lod2obd(md)->obd_name , idx);
 707                 return -EINVAL;
 708         }
 709
 710         return 0;
 711 }
 712
 713 /*
 714  * allocate array of objects pointers, find/create objects
 715  * stripenr and other fields should be initialized by this moment
 716  */
 717 int lod_initialize_objects(const struct lu_env *env, struct lod_object *lo,
 718                            struct lov_ost_data_v1 *objs)
 719 {
 720         struct lod_thread_info  *info = lod_env_info(env);
 721         struct lod_device       *md;
 722         struct lu_object        *o, *n;
 723         struct lu_device        *nd;
 724         struct dt_object       **stripe;
 725         int                      stripe_len;
 726         int                      i, idx, rc = 0;
 727         ENTRY;
 728
 729         LASSERT(lo != NULL);
 730         md = lu2lod_dev(lo->ldo_obj.do_lu.lo_dev);
 731         LASSERT(lo->ldo_stripe == NULL);
 732         LASSERT(lo->ldo_stripenr > 0);
 733         LASSERT(lo->ldo_stripe_size > 0);
 734
 735         stripe_len = lo->ldo_stripenr;
 736         OBD_ALLOC(stripe, sizeof(stripe[0]) * stripe_len);
 737         if (stripe == NULL)
 738                 RETURN(-ENOMEM);
 739
 740         for (i = 0; i < lo->ldo_stripenr; i++) {
 741                 ostid_le_to_cpu(&objs[i].l_ost_oi, &info->lti_ostid);
 742                 idx = le32_to_cpu(objs[i].l_ost_idx);
 743                 rc = ostid_to_fid(&info->lti_fid, &info->lti_ostid, idx);
 744                 if (rc != 0)
 745                         GOTO(out, rc);
 746                 LASSERTF(fid_is_sane(&info->lti_fid), ""DFID" insane!\n",
 747                          PFID(&info->lti_fid));
 748                 lod_getref(&md->lod_ost_descs);
 749
 750                 rc = validate_lod_and_idx(md, idx);
 751                 if (unlikely(rc != 0)) {
 752                         lod_putref(md, &md->lod_ost_descs);
 753                         GOTO(out, rc);
 754                 }
 755
 756                 nd = &OST_TGT(md,idx)->ltd_ost->dd_lu_dev;
 757                 lod_putref(md, &md->lod_ost_descs);
 758
 759                 /* In the function below, .hs_keycmp resolves to
 760                  * u_obj_hop_keycmp() */
 761                 /* coverity[overrun-buffer-val] */
 762                 o = lu_object_find_at(env, nd, &info->lti_fid, NULL);
 763                 if (IS_ERR(o))
 764                         GOTO(out, rc = PTR_ERR(o));
 765
 766                 n = lu_object_locate(o->lo_header, nd->ld_type);
 767                 LASSERT(n);
 768
 769                 stripe[i] = container_of(n, struct dt_object, do_lu);
 770         }
 771
 772 out:
 773         if (rc != 0) {
 774                 for (i = 0; i < stripe_len; i++)
 775                         if (stripe[i] != NULL)
 776                                 lu_object_put(env, &stripe[i]->do_lu);
 777
 778                 OBD_FREE(stripe, sizeof(stripe[0]) * stripe_len);
 779         } else {
 780                 lo->ldo_stripe = stripe;
 781                 lo->ldo_stripes_allocated = stripe_len;
 782         }
 783
 784         RETURN(rc);
 785 }
 786
 787 /*
 788  * Parse striping information stored in lti_ea_store
 789  */
 790 int lod_parse_striping(const struct lu_env *env, struct lod_object *lo,
 791                        const struct lu_buf *buf)
 792 {
 793         struct lov_mds_md_v1    *lmm;
 794         struct lov_ost_data_v1  *objs;
 795         __u32                    magic;
 796         __u32                    pattern;
 797         int                      rc = 0;
 798         ENTRY;
 799
 800         LASSERT(buf);
 801         LASSERT(buf->lb_buf);
 802         LASSERT(buf->lb_len);
 803
 804         lmm = (struct lov_mds_md_v1 *) buf->lb_buf;
 805         magic = le32_to_cpu(lmm->lmm_magic);
 806         pattern = le32_to_cpu(lmm->lmm_pattern);
 807
 808         if (magic != LOV_MAGIC_V1 && magic != LOV_MAGIC_V3)
 809                 GOTO(out, rc = -EINVAL);
 810         if (lov_pattern(pattern) != LOV_PATTERN_RAID0)
 811                 GOTO(out, rc = -EINVAL);
 812
 813         lo->ldo_pattern = pattern;
 814         lo->ldo_stripe_size = le32_to_cpu(lmm->lmm_stripe_size);
 815         lo->ldo_layout_gen = le16_to_cpu(lmm->lmm_layout_gen);
 816         lo->ldo_stripenr = le16_to_cpu(lmm->lmm_stripe_count);
 817         /* released file stripenr fixup. */
 818         if (pattern & LOV_PATTERN_F_RELEASED)
 819                 lo->ldo_stripenr = 0;
 820
 821         LASSERT(buf->lb_len >= lov_mds_md_size(lo->ldo_stripenr, magic));
 822
 823         if (magic == LOV_MAGIC_V3) {
 824                 struct lov_mds_md_v3 *v3 = (struct lov_mds_md_v3 *) lmm;
 825                 objs = &v3->lmm_objects[0];
 826                 lod_object_set_pool(lo, v3->lmm_pool_name);
 827         } else {
 828                 objs = &lmm->lmm_objects[0];
 829         }
 830
 831         if (lo->ldo_stripenr > 0)
 832                 rc = lod_initialize_objects(env, lo, objs);
 833
 834 out:
 835         RETURN(rc);
 836 }
 837
 838 /*
 839  * Load and parse striping information, create in-core representation for the
 840  * stripes
 841  */
 842 int lod_load_striping(const struct lu_env *env, struct lod_object *lo)
 843 {
 844         struct lod_thread_info  *info = lod_env_info(env);
 845         struct dt_object        *next = dt_object_child(&lo->ldo_obj);
 846         int                      rc = 0;
 847         ENTRY;
 848
 849         /*
 850          * currently this code is supposed to be called from declaration
 851          * phase only, thus the object is not expected to be locked by caller
 852          */
 853         dt_write_lock(env, next, 0);
 854         /* already initialized? */
 855         if (lo->ldo_stripe != NULL)
 856                 GOTO(out, rc = 0);
 857
 858         /* Do not load stripe for slaves of striped dir */
 859         if (!dt_object_exists(next) || lo->ldo_dir_slave_stripe)
 860                 GOTO(out, rc = 0);
 861
 862         /* only regular files can be striped */
 863         if (lu_object_attr(lod2lu_obj(lo)) & S_IFREG) {
 864                 rc = lod_get_lov_ea(env, lo);
 865                 if (rc <= 0)
 866                         GOTO(out, rc);
 867                 /*
 868                  * there is LOV EA (striping information) in this object
 869                  * let's parse it and create in-core objects for the stripes
 870                  */
 871                 info->lti_buf.lb_buf = info->lti_ea_store;
 872                 info->lti_buf.lb_len = info->lti_ea_store_size;
 873                 rc = lod_parse_striping(env, lo, &info->lti_buf);
 874         } else if (lu_object_attr(lod2lu_obj(lo)) & S_IFDIR) {
 875                 rc = lod_get_lmv_ea(env, lo);
 876                 if (rc <= 0)
 877                         GOTO(out, rc);
 878                 /*
 879                  * there is LOV EA (striping information) in this object
 880                  * let's parse it and create in-core objects for the stripes
 881                  */
 882                 info->lti_buf.lb_buf = info->lti_ea_store;
 883                 info->lti_buf.lb_len = info->lti_ea_store_size;
 884                 rc = lod_parse_dir_striping(env, lo, &info->lti_buf);
 885         }
 886 out:
 887         dt_write_unlock(env, next);
 888         RETURN(rc);
 889 }
 890
 891 int lod_verify_striping(struct lod_device *d, const struct lu_buf *buf,
 892                         int specific)
 893 {
 894         struct lov_user_md_v1   *lum;
 895         struct lov_user_md_v3   *lum3;
 896         struct pool_desc        *pool = NULL;
 897         __u32                    magic;
 898         __u32                    stripe_size;
 899         __u16                    stripe_count;
 900         __u16                    stripe_offset;
 901         size_t                   lum_size;
 902         int                      rc = 0;
 903         ENTRY;
 904
 905         lum = buf->lb_buf;
 906
 907         LASSERT(sizeof(*lum) < sizeof(*lum3));
 908
 909         if (buf->lb_len < sizeof(*lum)) {
 910                 CDEBUG(D_IOCTL, "buf len %zd too small for lov_user_md\n",
 911                        buf->lb_len);
 912                 GOTO(out, rc = -EINVAL);
 913         }
 914
 915         magic = le32_to_cpu(lum->lmm_magic);
 916         if (magic != LOV_USER_MAGIC_V1 &&
 917             magic != LOV_USER_MAGIC_V3 &&
 918             magic != LOV_MAGIC_V1_DEF &&
 919             magic != LOV_MAGIC_V3_DEF) {
 920                 CDEBUG(D_IOCTL, "bad userland LOV MAGIC: %#x\n", magic);
 921                 GOTO(out, rc = -EINVAL);
 922         }
 923
 924         if ((specific && le32_to_cpu(lum->lmm_pattern) != LOV_PATTERN_RAID0) ||
 925             (!specific && lum->lmm_pattern != 0)) {
 926                 CDEBUG(D_IOCTL, "bad userland stripe pattern: %#x\n",
 927                        le32_to_cpu(lum->lmm_pattern));
 928                 GOTO(out, rc = -EINVAL);
 929         }
 930
 931         /* 64kB is the largest common page size we see (ia64), and matches the
 932          * check in lfs */
 933         stripe_size = le32_to_cpu(lum->lmm_stripe_size);
 934         if (stripe_size & (LOV_MIN_STRIPE_SIZE - 1)) {
 935                 CDEBUG(D_IOCTL, "stripe size %u not a multiple of %u\n",
 936                        stripe_size, LOV_MIN_STRIPE_SIZE);
 937                 GOTO(out, rc = -EINVAL);
 938         }
 939
 940         /* an offset of -1 is treated as a "special" valid offset */
 941         stripe_offset = le16_to_cpu(lum->lmm_stripe_offset);
 942         if (stripe_offset != (typeof(stripe_offset))-1) {
 943                 /* if offset is not within valid range [0, osts_size) */
 944                 if (stripe_offset >= d->lod_osts_size) {
 945                         CDEBUG(D_IOCTL, "stripe offset %u >= bitmap size %u\n",
 946                                stripe_offset, d->lod_osts_size);
 947                         GOTO(out, rc = -EINVAL);
 948                 }
 949
 950                 /* if lmm_stripe_offset is *not* in bitmap */
 951                 if (!cfs_bitmap_check(d->lod_ost_bitmap, stripe_offset)) {
 952                         CDEBUG(D_IOCTL, "stripe offset %u not in bitmap\n",
 953                                stripe_offset);
 954                         GOTO(out, rc = -EINVAL);
 955                 }
 956         }
 957
 958         stripe_count = le16_to_cpu(lum->lmm_stripe_count);
 959         if (magic == LOV_USER_MAGIC_V1 || magic == LOV_MAGIC_V1_DEF)
 960                 lum_size = offsetof(struct lov_user_md_v1,
 961                                     lmm_objects[stripe_count]);
 962         else if (magic == LOV_USER_MAGIC_V3 || magic == LOV_MAGIC_V3_DEF)
 963                 lum_size = offsetof(struct lov_user_md_v3,
 964                                     lmm_objects[stripe_count]);
 965         else
 966                 LBUG();
 967
 968         if (specific && buf->lb_len != lum_size) {
 969                 CDEBUG(D_IOCTL, "invalid buf len %zd for lov_user_md with "
 970                        "magic %#x and stripe_count %u\n",
 971                        buf->lb_len, magic, stripe_count);
 972                 GOTO(out, rc = -EINVAL);
 973         }
 974
 975         if (!(magic == LOV_USER_MAGIC_V3 || magic == LOV_MAGIC_V3_DEF))
 976                 goto out;
 977
 978         lum3 = buf->lb_buf;
 979         if (buf->lb_len < sizeof(*lum3)) {
 980                 CDEBUG(D_IOCTL, "buf len %zd too small for lov_user_md_v3\n",
 981                        buf->lb_len);
 982                 GOTO(out, rc = -EINVAL);
 983         }
 984
 985         /* In the function below, .hs_keycmp resolves to
 986          * pool_hashkey_keycmp() */
 987         /* coverity[overrun-buffer-val] */
 988         pool = lod_find_pool(d, lum3->lmm_pool_name);
 989         if (pool == NULL)
 990                 goto out;
 991
 992         if (stripe_offset != (typeof(stripe_offset))-1) {
 993                 rc = lod_check_index_in_pool(stripe_offset, pool);
 994                 if (rc < 0)
 995                         GOTO(out, rc = -EINVAL);
 996         }
 997
 998         if (specific && stripe_count > pool_tgt_count(pool)) {
 999                 CDEBUG(D_IOCTL,
1000                        "stripe count %u > # OSTs %u in the pool\n",
1001                        stripe_count, pool_tgt_count(pool));
1002                 GOTO(out, rc = -EINVAL);
1003         }
1004
1005 out:
1006         if (pool != NULL)
1007                 lod_pool_putref(pool);
1008
1009         RETURN(rc);
1010 }
1011
1012 void lod_fix_desc_stripe_size(__u64 *val)
1013 {
1014         if (*val < LOV_MIN_STRIPE_SIZE) {
1015                 if (*val != 0)
1016                         LCONSOLE_INFO("Increasing default stripe size to "
1017                                       "minimum value %u\n",
1018                                       LOV_DEFAULT_STRIPE_SIZE);
1019                 *val = LOV_DEFAULT_STRIPE_SIZE;
1020         } else if (*val & (LOV_MIN_STRIPE_SIZE - 1)) {
1021                 *val &= ~(LOV_MIN_STRIPE_SIZE - 1);
1022                 LCONSOLE_WARN("Changing default stripe size to "LPU64" (a "
1023                               "multiple of %u)\n",
1024                               *val, LOV_MIN_STRIPE_SIZE);
1025         }
1026 }
1027
1028 void lod_fix_desc_stripe_count(__u32 *val)
1029 {
1030         if (*val == 0)
1031                 *val = 1;
1032 }
1033
1034 void lod_fix_desc_pattern(__u32 *val)
1035 {
1036         /* from lov_setstripe */
1037         if ((*val != 0) && (*val != LOV_PATTERN_RAID0)) {
1038                 LCONSOLE_WARN("Unknown stripe pattern: %#x\n", *val);
1039                 *val = 0;
1040         }
1041 }
1042
1043 void lod_fix_desc_qos_maxage(__u32 *val)
1044 {
1045         /* fix qos_maxage */
1046         if (*val == 0)
1047                 *val = QOS_DEFAULT_MAXAGE;
1048 }
1049
1050 void lod_fix_desc(struct lov_desc *desc)
1051 {
1052         lod_fix_desc_stripe_size(&desc->ld_default_stripe_size);
1053         lod_fix_desc_stripe_count(&desc->ld_default_stripe_count);
1054         lod_fix_desc_pattern(&desc->ld_pattern);
1055         lod_fix_desc_qos_maxage(&desc->ld_qos_maxage);
1056 }
1057
1058 int lod_pools_init(struct lod_device *lod, struct lustre_cfg *lcfg)
1059 {
1060         struct obd_device          *obd;
1061         struct lov_desc            *desc;
1062         int                         rc;
1063         ENTRY;
1064
1065         obd = class_name2obd(lustre_cfg_string(lcfg, 0));
1066         LASSERT(obd != NULL);
1067         obd->obd_lu_dev = &lod->lod_dt_dev.dd_lu_dev;
1068
1069         if (LUSTRE_CFG_BUFLEN(lcfg, 1) < 1) {
1070                 CERROR("LOD setup requires a descriptor\n");
1071                 RETURN(-EINVAL);
1072         }
1073
1074         desc = (struct lov_desc *)lustre_cfg_buf(lcfg, 1);
1075
1076         if (sizeof(*desc) > LUSTRE_CFG_BUFLEN(lcfg, 1)) {
1077                 CERROR("descriptor size wrong: %d > %d\n",
1078                        (int)sizeof(*desc), LUSTRE_CFG_BUFLEN(lcfg, 1));
1079                 RETURN(-EINVAL);
1080         }
1081
1082         if (desc->ld_magic != LOV_DESC_MAGIC) {
1083                 if (desc->ld_magic == __swab32(LOV_DESC_MAGIC)) {
1084                         CDEBUG(D_OTHER, "%s: Swabbing lov desc %p\n",
1085                                obd->obd_name, desc);
1086                         lustre_swab_lov_desc(desc);
1087                 } else {
1088                         CERROR("%s: Bad lov desc magic: %#x\n",
1089                                obd->obd_name, desc->ld_magic);
1090                         RETURN(-EINVAL);
1091                 }
1092         }
1093
1094         lod_fix_desc(desc);
1095
1096         desc->ld_active_tgt_count = 0;
1097         lod->lod_desc = *desc;
1098
1099         lod->lod_sp_me = LUSTRE_SP_CLI;
1100
1101         /* Set up allocation policy (QoS and RR) */
1102         CFS_INIT_LIST_HEAD(&lod->lod_qos.lq_oss_list);
1103         init_rwsem(&lod->lod_qos.lq_rw_sem);
1104         lod->lod_qos.lq_dirty = 1;
1105         lod->lod_qos.lq_rr.lqr_dirty = 1;
1106         lod->lod_qos.lq_reset = 1;
1107         /* Default priority is toward free space balance */
1108         lod->lod_qos.lq_prio_free = 232;
1109         /* Default threshold for rr (roughly 17%) */
1110         lod->lod_qos.lq_threshold_rr = 43;
1111
1112         /* Set up OST pool environment */
1113         lod->lod_pools_hash_body = cfs_hash_create("POOLS", HASH_POOLS_CUR_BITS,
1114                                                    HASH_POOLS_MAX_BITS,
1115                                                    HASH_POOLS_BKT_BITS, 0,
1116                                                    CFS_HASH_MIN_THETA,
1117                                                    CFS_HASH_MAX_THETA,
1118                                                    &pool_hash_operations,
1119                                                    CFS_HASH_DEFAULT);
1120         if (lod->lod_pools_hash_body == NULL)
1121                 RETURN(-ENOMEM);
1122
1123         CFS_INIT_LIST_HEAD(&lod->lod_pool_list);
1124         lod->lod_pool_count = 0;
1125         rc = lod_ost_pool_init(&lod->lod_pool_info, 0);
1126         if (rc)
1127                 GOTO(out_hash, rc);
1128         rc = lod_ost_pool_init(&lod->lod_qos.lq_rr.lqr_pool, 0);
1129         if (rc)
1130                 GOTO(out_pool_info, rc);
1131
1132         RETURN(0);
1133
1134 out_pool_info:
1135         lod_ost_pool_free(&lod->lod_pool_info);
1136 out_hash:
1137         cfs_hash_putref(lod->lod_pools_hash_body);
1138
1139         return rc;
1140 }
1141
1142 int lod_pools_fini(struct lod_device *lod)
1143 {
1144         struct obd_device   *obd = lod2obd(lod);
1145         cfs_list_t          *pos, *tmp;
1146         struct pool_desc    *pool;
1147         ENTRY;
1148
1149         cfs_list_for_each_safe(pos, tmp, &lod->lod_pool_list) {
1150                 pool = cfs_list_entry(pos, struct pool_desc, pool_list);
1151                 /* free pool structs */
1152                 CDEBUG(D_INFO, "delete pool %p\n", pool);
1153                 /* In the function below, .hs_keycmp resolves to
1154                  * pool_hashkey_keycmp() */
1155                 /* coverity[overrun-buffer-val] */
1156                 lod_pool_del(obd, pool->pool_name);
1157         }
1158
1159         cfs_hash_putref(lod->lod_pools_hash_body);
1160         lod_ost_pool_free(&(lod->lod_qos.lq_rr.lqr_pool));
1161         lod_ost_pool_free(&lod->lod_pool_info);
1162
1163         RETURN(0);
1164 }
1165