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
  39 #include "lod_internal.h"
  40
  41 /*
  42  * Keep a refcount of lod->ltd_tgts usage to prevent racing with
  43  * addition/deletion. Any function that expects lov_tgts to remain stationary
  44  * must take a ref.
  45  *
  46  * \param lod - is the lod device from which we want to grab a reference
  47  */
  48 void lod_getref(struct lod_tgt_descs *ltd)
  49 {
  50         down_read(&ltd->ltd_rw_sem);
  51         mutex_lock(&ltd->ltd_mutex);
  52         ltd->ltd_refcount++;
  53         mutex_unlock(&ltd->ltd_mutex);
  54 }
  55
  56 /*
  57  * Companion of lod_getref() to release a reference on the lod table.
  58  * If this is the last reference and the ost entry was scheduled for deletion,
  59  * the descriptor is removed from the array.
  60  *
  61  * \param lod - is the lod device from which we release a reference
  62  */
  63 void lod_putref(struct lod_device *lod, struct lod_tgt_descs *ltd)
  64 {
  65         mutex_lock(&ltd->ltd_mutex);
  66         ltd->ltd_refcount--;
  67         if (ltd->ltd_refcount == 0 && ltd->ltd_death_row) {
  68                 struct lod_tgt_desc *tgt_desc, *tmp;
  69                 int                  idx;
  70                 CFS_LIST_HEAD(kill);
  71
  72                 CDEBUG(D_CONFIG, "destroying %d ltd desc\n",
  73                        ltd->ltd_death_row);
  74
  75                 cfs_foreach_bit(ltd->ltd_tgt_bitmap, idx) {
  76                         tgt_desc = LTD_TGT(ltd, idx);
  77                         LASSERT(tgt_desc);
  78
  79                         if (!tgt_desc->ltd_reap)
  80                                 continue;
  81
  82                         cfs_list_add(&tgt_desc->ltd_kill, &kill);
  83                         LTD_TGT(ltd, idx) = NULL;
  84                         /*FIXME: only support ost pool for now */
  85                         if (ltd == &lod->lod_ost_descs) {
  86                                 lod_ost_pool_remove(&lod->lod_pool_info, idx);
  87                                 if (tgt_desc->ltd_active)
  88                                         lod->lod_desc.ld_active_tgt_count--;
  89                         }
  90                         ltd->ltd_tgtnr--;
  91                         cfs_bitmap_clear(ltd->ltd_tgt_bitmap, idx);
  92                         ltd->ltd_death_row--;
  93                 }
  94                 mutex_unlock(&ltd->ltd_mutex);
  95                 up_read(&ltd->ltd_rw_sem);
  96
  97                 cfs_list_for_each_entry_safe(tgt_desc, tmp, &kill, ltd_kill) {
  98                         int rc;
  99                         cfs_list_del(&tgt_desc->ltd_kill);
 100                         if (ltd == &lod->lod_ost_descs) {
 101                                 /* remove from QoS structures */
 102                                 rc = qos_del_tgt(lod, tgt_desc);
 103                                 if (rc)
 104                                         CERROR("%s: qos_del_tgt(%s) failed:"
 105                                                "rc = %d\n",
 106                                                lod2obd(lod)->obd_name,
 107                                               obd_uuid2str(&tgt_desc->ltd_uuid),
 108                                                rc);
 109                         }
 110                         rc = obd_disconnect(tgt_desc->ltd_exp);
 111                         if (rc)
 112                                 CERROR("%s: failed to disconnect %s: rc = %d\n",
 113                                        lod2obd(lod)->obd_name,
 114                                        obd_uuid2str(&tgt_desc->ltd_uuid), rc);
 115                         OBD_FREE_PTR(tgt_desc);
 116                 }
 117         } else {
 118                 mutex_unlock(&ltd->ltd_mutex);
 119                 up_read(&ltd->ltd_rw_sem);
 120         }
 121 }
 122
 123 static int ltd_bitmap_resize(struct lod_tgt_descs *ltd, __u32 newsize)
 124 {
 125         cfs_bitmap_t *new_bitmap, *old_bitmap = NULL;
 126         int           rc = 0;
 127         ENTRY;
 128
 129         /* grab write reference on the lod. Relocating the array requires
 130          * exclusive access */
 131
 132         down_write(&ltd->ltd_rw_sem);
 133         if (newsize <= ltd->ltd_tgts_size)
 134                 /* someone else has already resize the array */
 135                 GOTO(out, rc = 0);
 136
 137         /* allocate new bitmap */
 138         new_bitmap = CFS_ALLOCATE_BITMAP(newsize);
 139         if (!new_bitmap)
 140                 GOTO(out, rc = -ENOMEM);
 141
 142         if (ltd->ltd_tgts_size > 0) {
 143                 /* the bitmap already exists, we need
 144                  * to copy data from old one */
 145                 cfs_bitmap_copy(new_bitmap, ltd->ltd_tgt_bitmap);
 146                 old_bitmap = ltd->ltd_tgt_bitmap;
 147         }
 148
 149         ltd->ltd_tgts_size  = newsize;
 150         ltd->ltd_tgt_bitmap = new_bitmap;
 151
 152         if (old_bitmap)
 153                 CFS_FREE_BITMAP(old_bitmap);
 154
 155         CDEBUG(D_CONFIG, "tgt size: %d\n", ltd->ltd_tgts_size);
 156
 157         EXIT;
 158 out:
 159         up_write(&ltd->ltd_rw_sem);
 160         return rc;
 161 }
 162
 163 /*
 164  * Connect LOD to a new OSP and add it to the device table.
 165  *
 166  * \param env - is the environment passed by the caller
 167  * \param lod - is the LOD device to be connected to the new OSP
 168  * \param osp - is the name of OSP device name about to be added
 169  * \param index - is the OSP index
 170  * \param gen - is the generation number
 171  * \param tgt_index - is the group of the OSP.
 172  * \param type - is the type of device (mdc or osc)
 173  */
 174 int lod_add_device(const struct lu_env *env, struct lod_device *lod,
 175                    char *osp, unsigned index, unsigned gen, int tgt_index,
 176                    char *type, int active)
 177 {
 178         struct obd_connect_data *data = NULL;
 179         struct obd_export       *exp = NULL;
 180         struct obd_device       *obd;
 181         struct lu_device        *ldev;
 182         struct dt_device        *d;
 183         int                      rc;
 184         struct lod_tgt_desc     *tgt_desc;
 185         struct lod_tgt_descs    *ltd;
 186         struct obd_uuid         obd_uuid;
 187         ENTRY;
 188
 189         CDEBUG(D_CONFIG, "osp:%s idx:%d gen:%d\n", osp, index, gen);
 190
 191         if (gen <= 0) {
 192                 CERROR("request to add OBD %s with invalid generation: %d\n",
 193                        osp, gen);
 194                 RETURN(-EINVAL);
 195         }
 196
 197         obd_str2uuid(&obd_uuid, osp);
 198
 199         obd = class_find_client_obd(&obd_uuid, LUSTRE_OSP_NAME,
 200                                 &lod->lod_dt_dev.dd_lu_dev.ld_obd->obd_uuid);
 201         if (obd == NULL) {
 202                 CERROR("can't find %s device\n", osp);
 203                 RETURN(-EINVAL);
 204         }
 205
 206         OBD_ALLOC_PTR(data);
 207         if (data == NULL)
 208                 RETURN(-ENOMEM);
 209
 210         data->ocd_connect_flags = OBD_CONNECT_INDEX | OBD_CONNECT_VERSION;
 211         data->ocd_version = LUSTRE_VERSION_CODE;
 212         data->ocd_index = index;
 213
 214         if (strcmp(LUSTRE_OSC_NAME, type) == 0) {
 215                 data->ocd_connect_flags |= OBD_CONNECT_AT |
 216                                            OBD_CONNECT_FULL20 |
 217                                            OBD_CONNECT_INDEX |
 218 #ifdef HAVE_LRU_RESIZE_SUPPORT
 219                                            OBD_CONNECT_LRU_RESIZE |
 220 #endif
 221                                            OBD_CONNECT_MDS |
 222                                            OBD_CONNECT_OSS_CAPA |
 223                                            OBD_CONNECT_REQPORTAL |
 224                                            OBD_CONNECT_SKIP_ORPHAN |
 225                                            OBD_CONNECT_FID |
 226                                            OBD_CONNECT_LVB_TYPE |
 227                                            OBD_CONNECT_VERSION |
 228                                            OBD_CONNECT_PINGLESS;
 229
 230                 data->ocd_group = tgt_index;
 231                 ltd = &lod->lod_ost_descs;
 232         } else {
 233                 struct obd_import *imp = obd->u.cli.cl_import;
 234
 235                 data->ocd_ibits_known = MDS_INODELOCK_UPDATE;
 236                 data->ocd_connect_flags |= OBD_CONNECT_ACL |
 237                                            OBD_CONNECT_MDS_CAPA |
 238                                            OBD_CONNECT_OSS_CAPA |
 239                                            OBD_CONNECT_IBITS |
 240                                            OBD_CONNECT_MDS_MDS |
 241                                            OBD_CONNECT_FID |
 242                                            OBD_CONNECT_AT |
 243                                            OBD_CONNECT_FULL20;
 244                 /* XXX set MDS-MDS flags, remove this when running this
 245                  * on client*/
 246                 data->ocd_connect_flags |= OBD_CONNECT_MDS_MDS;
 247                 spin_lock(&imp->imp_lock);
 248                 imp->imp_server_timeout = 1;
 249                 spin_unlock(&imp->imp_lock);
 250                 imp->imp_client->cli_request_portal = OUT_PORTAL;
 251                 CDEBUG(D_OTHER, "%s: Set 'mds' portal and timeout\n",
 252                       obd->obd_name);
 253                 ltd = &lod->lod_mdt_descs;
 254         }
 255
 256         rc = obd_connect(env, &exp, obd, &obd->obd_uuid, data, NULL);
 257         OBD_FREE_PTR(data);
 258         if (rc) {
 259                 CERROR("%s: cannot connect to next dev %s (%d)\n",
 260                        obd->obd_name, osp, rc);
 261                 GOTO(out_free, rc);
 262         }
 263
 264         LASSERT(obd->obd_lu_dev);
 265         LASSERT(obd->obd_lu_dev->ld_site == lod->lod_dt_dev.dd_lu_dev.ld_site);
 266
 267         ldev = obd->obd_lu_dev;
 268         d = lu2dt_dev(ldev);
 269
 270         /* Allocate ost descriptor and fill it */
 271         OBD_ALLOC_PTR(tgt_desc);
 272         if (!tgt_desc)
 273                 GOTO(out_conn, rc = -ENOMEM);
 274
 275         tgt_desc->ltd_tgt    = d;
 276         tgt_desc->ltd_exp    = exp;
 277         tgt_desc->ltd_uuid   = obd->u.cli.cl_target_uuid;
 278         tgt_desc->ltd_gen    = gen;
 279         tgt_desc->ltd_index  = index;
 280         tgt_desc->ltd_active = active;
 281
 282         lod_getref(ltd);
 283         if (index >= ltd->ltd_tgts_size) {
 284                 /* we have to increase the size of the lod_osts array */
 285                 __u32  newsize;
 286
 287                 newsize = max(ltd->ltd_tgts_size, (__u32)2);
 288                 while (newsize < index + 1)
 289                         newsize = newsize << 1;
 290
 291                 /* lod_bitmap_resize() needs lod_rw_sem
 292                  * which we hold with th reference */
 293                 lod_putref(lod, ltd);
 294
 295                 rc = ltd_bitmap_resize(ltd, newsize);
 296                 if (rc)
 297                         GOTO(out_desc, rc);
 298
 299                 lod_getref(ltd);
 300         }
 301
 302         mutex_lock(&ltd->ltd_mutex);
 303         if (cfs_bitmap_check(ltd->ltd_tgt_bitmap, index)) {
 304                 CERROR("%s: device %d is registered already\n", obd->obd_name,
 305                        index);
 306                 GOTO(out_mutex, rc = -EEXIST);
 307         }
 308
 309         if (ltd->ltd_tgt_idx[index / TGT_PTRS_PER_BLOCK] == NULL) {
 310                 OBD_ALLOC_PTR(ltd->ltd_tgt_idx[index / TGT_PTRS_PER_BLOCK]);
 311                 if (ltd->ltd_tgt_idx[index / TGT_PTRS_PER_BLOCK] == NULL) {
 312                         CERROR("can't allocate index to add %s\n",
 313                                obd->obd_name);
 314                         GOTO(out_mutex, rc = -ENOMEM);
 315                 }
 316         }
 317
 318         if (!strcmp(LUSTRE_OSC_NAME, type)) {
 319                 /* pool and qos are not supported for MDS stack yet */
 320                 rc = lod_ost_pool_add(&lod->lod_pool_info, index,
 321                                       lod->lod_osts_size);
 322                 if (rc) {
 323                         CERROR("%s: can't set up pool, failed with %d\n",
 324                                obd->obd_name, rc);
 325                         GOTO(out_mutex, rc);
 326                 }
 327
 328                 rc = qos_add_tgt(lod, tgt_desc);
 329                 if (rc) {
 330                         CERROR("%s: qos_add_tgt failed with %d\n",
 331                                 obd->obd_name, rc);
 332                         GOTO(out_pool, rc);
 333                 }
 334
 335                 /* The new OST is now a full citizen */
 336                 if (index >= lod->lod_desc.ld_tgt_count)
 337                         lod->lod_desc.ld_tgt_count = index + 1;
 338                 if (active)
 339                         lod->lod_desc.ld_active_tgt_count++;
 340         }
 341
 342         LTD_TGT(ltd, index) = tgt_desc;
 343         cfs_bitmap_set(ltd->ltd_tgt_bitmap, index);
 344         ltd->ltd_tgtnr++;
 345         mutex_unlock(&ltd->ltd_mutex);
 346         lod_putref(lod, ltd);
 347         if (lod->lod_recovery_completed)
 348                 ldev->ld_ops->ldo_recovery_complete(env, ldev);
 349
 350         RETURN(0);
 351
 352 out_pool:
 353         lod_ost_pool_remove(&lod->lod_pool_info, index);
 354 out_mutex:
 355         mutex_unlock(&ltd->ltd_mutex);
 356         lod_putref(lod, ltd);
 357 out_desc:
 358         OBD_FREE_PTR(tgt_desc);
 359 out_conn:
 360         obd_disconnect(exp);
 361 out_free:
 362         return rc;
 363 }
 364
 365 /*
 366  * helper function to schedule OST removal from the device table
 367  */
 368 static void __lod_del_device(struct lod_tgt_descs *ltd,
 369                              unsigned idx)
 370 {
 371         LASSERT(LTD_TGT(ltd, idx));
 372         if (LTD_TGT(ltd, idx)->ltd_reap == 0) {
 373                 LTD_TGT(ltd, idx)->ltd_reap = 1;
 374                 ltd->ltd_death_row++;
 375         }
 376 }
 377
 378 int lod_fini_tgt(struct lod_device *lod, struct lod_tgt_descs *ltd)
 379 {
 380         int idx;
 381
 382         if (ltd->ltd_tgts_size <= 0)
 383                 return 0;
 384         lod_getref(ltd);
 385         mutex_lock(&ltd->ltd_mutex);
 386         cfs_foreach_bit(ltd->ltd_tgt_bitmap, idx)
 387                 __lod_del_device(ltd, idx);
 388         mutex_unlock(&ltd->ltd_mutex);
 389         lod_putref(lod, ltd);
 390         CFS_FREE_BITMAP(ltd->ltd_tgt_bitmap);
 391         for (idx = 0; idx < TGT_PTRS; idx++) {
 392                 if (ltd->ltd_tgt_idx[idx])
 393                         OBD_FREE_PTR(ltd->ltd_tgt_idx[idx]);
 394         }
 395         ltd->ltd_tgts_size = 0;
 396         return 0;
 397 }
 398
 399 /*
 400  * Add support for administratively disabled OST (through the MGS).
 401  * Schedule a target for deletion.  Disconnection and real removal from the
 402  * table takes place in lod_putref() once the last table user release its
 403  * reference.
 404  *
 405  * \param env - is the environment passed by the caller
 406  * \param lod - is the lod device currently connected to the OSP about to be
 407  *              removed
 408  * \param osp - is the name of OSP device about to be removed
 409  * \param idx - is the OSP index
 410  * \param gen - is the generation number, not used currently
 411  */
 412 int lod_del_device(const struct lu_env *env, struct lod_device *lod,
 413                    struct lod_tgt_descs *ltd, char *osp, unsigned idx,
 414                    unsigned gen)
 415 {
 416         struct obd_device *obd;
 417         int                rc = 0;
 418         struct obd_uuid    uuid;
 419         ENTRY;
 420
 421         CDEBUG(D_CONFIG, "osp:%s idx:%d gen:%d\n", osp, idx, gen);
 422
 423         obd_str2uuid(&uuid, osp);
 424
 425         obd = class_find_client_obd(&uuid, LUSTRE_OSP_NAME,
 426                                    &lod->lod_dt_dev.dd_lu_dev.ld_obd->obd_uuid);
 427         if (obd == NULL) {
 428                 CERROR("can't find %s device\n", osp);
 429                 RETURN(-EINVAL);
 430         }
 431
 432         if (gen <= 0) {
 433                 CERROR("%s: request to remove OBD %s with invalid generation %d"
 434                        "\n", obd->obd_name, osp, gen);
 435                 RETURN(-EINVAL);
 436         }
 437
 438         obd_str2uuid(&uuid,  osp);
 439
 440         lod_getref(ltd);
 441         mutex_lock(&ltd->ltd_mutex);
 442         /* check that the index is allocated in the bitmap */
 443         if (!cfs_bitmap_check(ltd->ltd_tgt_bitmap, idx) ||
 444             !LTD_TGT(ltd, idx)) {
 445                 CERROR("%s: device %d is not set up\n", obd->obd_name, idx);
 446                 GOTO(out, rc = -EINVAL);
 447         }
 448
 449         /* check that the UUID matches */
 450         if (!obd_uuid_equals(&uuid, &LTD_TGT(ltd, idx)->ltd_uuid)) {
 451                 CERROR("%s: LOD target UUID %s at index %d does not match %s\n",
 452                        obd->obd_name, obd_uuid2str(&LTD_TGT(ltd,idx)->ltd_uuid),
 453                        idx, osp);
 454                 GOTO(out, rc = -EINVAL);
 455         }
 456
 457         __lod_del_device(ltd, idx);
 458         EXIT;
 459 out:
 460         mutex_unlock(&ltd->ltd_mutex);
 461         lod_putref(lod, ltd);
 462         return(rc);
 463 }
 464
 465 int lod_ea_store_resize(struct lod_thread_info *info, int size)
 466 {
 467         int round = size_roundup_power2(size);
 468
 469         LASSERT(round <= lov_mds_md_size(LOV_MAX_STRIPE_COUNT, LOV_MAGIC_V3));
 470         if (info->lti_ea_store) {
 471                 LASSERT(info->lti_ea_store_size);
 472                 LASSERT(info->lti_ea_store_size < round);
 473                 CDEBUG(D_INFO, "EA store size %d is not enough, need %d\n",
 474                        info->lti_ea_store_size, round);
 475                 OBD_FREE_LARGE(info->lti_ea_store, info->lti_ea_store_size);
 476                 info->lti_ea_store = NULL;
 477                 info->lti_ea_store_size = 0;
 478         }
 479
 480         OBD_ALLOC_LARGE(info->lti_ea_store, round);
 481         if (info->lti_ea_store == NULL)
 482                 RETURN(-ENOMEM);
 483         info->lti_ea_store_size = round;
 484         RETURN(0);
 485 }
 486
 487 /*
 488  * generate and write LOV EA for given striped object
 489  */
 490 int lod_generate_and_set_lovea(const struct lu_env *env,
 491                                struct lod_object *lo, struct thandle *th)
 492 {
 493         struct lod_thread_info  *info = lod_env_info(env);
 494         struct dt_object        *next = dt_object_child(&lo->ldo_obj);
 495         const struct lu_fid     *fid  = lu_object_fid(&lo->ldo_obj.do_lu);
 496         struct lov_mds_md_v1    *lmm;
 497         struct lov_ost_data_v1  *objs;
 498         __u32                    magic;
 499         int                      i, rc, lmm_size;
 500         int                      cplen = 0;
 501         ENTRY;
 502
 503         LASSERT(lo);
 504
 505         magic = lo->ldo_pool != NULL ? LOV_MAGIC_V3 : LOV_MAGIC_V1;
 506         lmm_size = lov_mds_md_size(lo->ldo_stripenr, magic);
 507         if (info->lti_ea_store_size < lmm_size) {
 508                 rc = lod_ea_store_resize(info, lmm_size);
 509                 if (rc)
 510                         RETURN(rc);
 511         }
 512
 513         if (lo->ldo_pattern == 0) /* default striping */
 514                 lo->ldo_pattern = LOV_PATTERN_RAID0;
 515
 516         lmm = info->lti_ea_store;
 517
 518         lmm->lmm_magic = cpu_to_le32(magic);
 519         lmm->lmm_pattern = cpu_to_le32(lo->ldo_pattern);
 520         fid_to_lmm_oi(fid, &lmm->lmm_oi);
 521         lmm_oi_cpu_to_le(&lmm->lmm_oi, &lmm->lmm_oi);
 522         lmm->lmm_stripe_size = cpu_to_le32(lo->ldo_stripe_size);
 523         lmm->lmm_stripe_count = cpu_to_le16(lo->ldo_stripenr);
 524         if (lo->ldo_pattern & LOV_PATTERN_F_RELEASED)
 525                 lmm->lmm_stripe_count = cpu_to_le16(lo->ldo_released_stripenr);
 526         lmm->lmm_layout_gen = 0;
 527         if (magic == LOV_MAGIC_V1) {
 528                 objs = &lmm->lmm_objects[0];
 529         } else {
 530                 struct lov_mds_md_v3 *v3 = (struct lov_mds_md_v3 *) lmm;
 531                 cplen = strlcpy(v3->lmm_pool_name, lo->ldo_pool,
 532                                 sizeof(v3->lmm_pool_name));
 533                 if (cplen >= sizeof(v3->lmm_pool_name))
 534                         RETURN(-E2BIG);
 535                 objs = &v3->lmm_objects[0];
 536         }
 537
 538         for (i = 0; i < lo->ldo_stripenr; i++) {
 539                 const struct lu_fid     *fid;
 540                 struct lod_device       *lod;
 541                 __u32                   index;
 542
 543                 lod = lu2lod_dev(lo->ldo_obj.do_lu.lo_dev);
 544                 LASSERT(lo->ldo_stripe[i]);
 545                 fid = lu_object_fid(&lo->ldo_stripe[i]->do_lu);
 546
 547                 rc = fid_to_ostid(fid, &info->lti_ostid);
 548                 LASSERT(rc == 0);
 549
 550                 ostid_cpu_to_le(&info->lti_ostid, &objs[i].l_ost_oi);
 551                 objs[i].l_ost_gen    = cpu_to_le32(0);
 552                 rc = lod_fld_lookup(env, lod, fid, &index, LU_SEQ_RANGE_OST);
 553                 if (rc < 0) {
 554                         lod_object_free_striping(env, lo);
 555                         CERROR("%s: Can not locate "DFID": rc = %d\n",
 556                                lod2obd(lod)->obd_name, PFID(fid), rc);
 557                         RETURN(rc);
 558                 }
 559                 objs[i].l_ost_idx = cpu_to_le32(index);
 560         }
 561
 562         info->lti_buf.lb_buf = lmm;
 563         info->lti_buf.lb_len = lmm_size;
 564         rc = dt_xattr_set(env, next, &info->lti_buf, XATTR_NAME_LOV, 0,
 565                           th, BYPASS_CAPA);
 566         if (rc < 0)
 567                 lod_object_free_striping(env, lo);
 568
 569         RETURN(rc);
 570 }
 571
 572 int lod_get_lov_ea(const struct lu_env *env, struct lod_object *lo)
 573 {
 574         struct lod_thread_info *info = lod_env_info(env);
 575         struct dt_object       *next = dt_object_child(&lo->ldo_obj);
 576         int                     rc;
 577         ENTRY;
 578
 579         LASSERT(info);
 580
 581         if (unlikely(info->lti_ea_store_size == 0)) {
 582                 /* just to enter in allocation block below */
 583                 rc = -ERANGE;
 584         } else {
 585 repeat:
 586                 info->lti_buf.lb_buf = info->lti_ea_store;
 587                 info->lti_buf.lb_len = info->lti_ea_store_size;
 588                 rc = dt_xattr_get(env, next, &info->lti_buf, XATTR_NAME_LOV,
 589                                   BYPASS_CAPA);
 590         }
 591         /* if object is not striped or inaccessible */
 592         if (rc == -ENODATA)
 593                 RETURN(0);
 594
 595         if (rc == -ERANGE) {
 596                 /* EA doesn't fit, reallocate new buffer */
 597                 rc = dt_xattr_get(env, next, &LU_BUF_NULL, XATTR_NAME_LOV,
 598                                   BYPASS_CAPA);
 599                 if (rc == -ENODATA)
 600                         RETURN(0);
 601                 else if (rc < 0)
 602                         RETURN(rc);
 603
 604                 LASSERT(rc > 0);
 605                 rc = lod_ea_store_resize(info, rc);
 606                 if (rc)
 607                         RETURN(rc);
 608                 goto repeat;
 609         }
 610
 611         RETURN(rc);
 612 }
 613
 614 int lod_store_def_striping(const struct lu_env *env, struct dt_object *dt,
 615                            struct thandle *th)
 616 {
 617         struct lod_thread_info  *info = lod_env_info(env);
 618         struct lod_object       *lo = lod_dt_obj(dt);
 619         struct dt_object        *next = dt_object_child(dt);
 620         struct lov_user_md_v3   *v3;
 621         int                      rc;
 622         int                      cplen = 0;
 623         ENTRY;
 624
 625         LASSERT(S_ISDIR(dt->do_lu.lo_header->loh_attr));
 626
 627         /*
 628          * store striping defaults into new directory
 629          * used to implement defaults inheritance
 630          */
 631
 632         /* probably nothing to inherite */
 633         if (lo->ldo_striping_cached == 0)
 634                 RETURN(0);
 635
 636         if (LOVEA_DELETE_VALUES(lo->ldo_def_stripe_size, lo->ldo_def_stripenr,
 637                                 lo->ldo_def_stripe_offset, lo->ldo_pool))
 638                 RETURN(0);
 639
 640         /* XXX: use thread info */
 641         OBD_ALLOC_PTR(v3);
 642         if (v3 == NULL)
 643                 RETURN(-ENOMEM);
 644
 645         v3->lmm_magic = cpu_to_le32(LOV_MAGIC_V3);
 646         v3->lmm_pattern = cpu_to_le32(LOV_PATTERN_RAID0);
 647         v3->lmm_stripe_size = cpu_to_le32(lo->ldo_def_stripe_size);
 648         v3->lmm_stripe_count = cpu_to_le16(lo->ldo_def_stripenr);
 649         v3->lmm_stripe_offset = cpu_to_le16(lo->ldo_def_stripe_offset);
 650         if (lo->ldo_pool) {
 651                 cplen = strlcpy(v3->lmm_pool_name, lo->ldo_pool,
 652                                 sizeof(v3->lmm_pool_name));
 653                 if (cplen >= sizeof(v3->lmm_pool_name)) {
 654                         OBD_FREE_PTR(v3);
 655                         RETURN(-E2BIG);
 656                 }
 657         }
 658
 659         info->lti_buf.lb_buf = v3;
 660         info->lti_buf.lb_len = sizeof(*v3);
 661         rc = dt_xattr_set(env, next, &info->lti_buf, XATTR_NAME_LOV, 0, th,
 662                         BYPASS_CAPA);
 663
 664         OBD_FREE_PTR(v3);
 665
 666         RETURN(rc);
 667 }
 668
 669 static int validate_lod_and_idx(struct lod_device *md, int idx)
 670 {
 671         if (unlikely(idx >= md->lod_ost_descs.ltd_tgts_size ||
 672                      !cfs_bitmap_check(md->lod_ost_bitmap, idx))) {
 673                 CERROR("%s: bad idx: %d of %d\n", lod2obd(md)->obd_name, idx,
 674                        md->lod_ost_descs.ltd_tgts_size);
 675                 return -EINVAL;
 676         }
 677
 678         if (unlikely(OST_TGT(md, idx) == NULL)) {
 679                 CERROR("%s: bad lod_tgt_desc for idx: %d\n",
 680                        lod2obd(md)->obd_name, idx);
 681                 return -EINVAL;
 682         }
 683
 684         if (unlikely(OST_TGT(md, idx)->ltd_ost == NULL)) {
 685                 CERROR("%s: invalid lod device, for idx: %d\n",
 686                        lod2obd(md)->obd_name , idx);
 687                 return -EINVAL;
 688         }
 689
 690         return 0;
 691 }
 692
 693 /*
 694  * allocate array of objects pointers, find/create objects
 695  * stripenr and other fields should be initialized by this moment
 696  */
 697 int lod_initialize_objects(const struct lu_env *env, struct lod_object *lo,
 698                            struct lov_ost_data_v1 *objs)
 699 {
 700         struct lod_thread_info  *info = lod_env_info(env);
 701         struct lod_device       *md = lu2lod_dev(lo->ldo_obj.do_lu.lo_dev);
 702         struct lu_object        *o, *n;
 703         struct lu_device        *nd;
 704         struct dt_object       **stripe;
 705         int                      stripe_len;
 706         int                      i, idx, rc = 0;
 707         ENTRY;
 708
 709         LASSERT(lo != NULL);
 710         LASSERT(lo->ldo_stripe == NULL);
 711         LASSERT(lo->ldo_stripenr > 0);
 712         LASSERT(lo->ldo_stripe_size > 0);
 713
 714         stripe_len = lo->ldo_stripenr;
 715         OBD_ALLOC(stripe, sizeof(stripe[0]) * stripe_len);
 716         if (stripe == NULL)
 717                 RETURN(-ENOMEM);
 718
 719         for (i = 0; i < lo->ldo_stripenr; i++) {
 720                 ostid_le_to_cpu(&objs[i].l_ost_oi, &info->lti_ostid);
 721                 idx = le64_to_cpu(objs[i].l_ost_idx);
 722                 rc = ostid_to_fid(&info->lti_fid, &info->lti_ostid, idx);
 723                 if (rc != 0)
 724                         GOTO(out, rc);
 725                 LASSERTF(fid_is_sane(&info->lti_fid), ""DFID" insane!\n",
 726                          PFID(&info->lti_fid));
 727                 lod_getref(&md->lod_ost_descs);
 728
 729                 rc = validate_lod_and_idx(md, idx);
 730                 if (unlikely(rc != 0)) {
 731                         lod_putref(md, &md->lod_ost_descs);
 732                         GOTO(out, rc);
 733                 }
 734
 735                 nd = &OST_TGT(md,idx)->ltd_ost->dd_lu_dev;
 736                 lod_putref(md, &md->lod_ost_descs);
 737
 738                 /* In the function below, .hs_keycmp resolves to
 739                  * u_obj_hop_keycmp() */
 740                 /* coverity[overrun-buffer-val] */
 741                 o = lu_object_find_at(env, nd, &info->lti_fid, NULL);
 742                 if (IS_ERR(o))
 743                         GOTO(out, rc = PTR_ERR(o));
 744
 745                 n = lu_object_locate(o->lo_header, nd->ld_type);
 746                 LASSERT(n);
 747
 748                 stripe[i] = container_of(n, struct dt_object, do_lu);
 749         }
 750
 751 out:
 752         if (rc != 0) {
 753                 for (i = 0; i < stripe_len; i++)
 754                         if (stripe[i] != NULL)
 755                                 lu_object_put(env, &stripe[i]->do_lu);
 756
 757                 OBD_FREE(stripe, sizeof(stripe[0]) * stripe_len);
 758         } else {
 759                 lo->ldo_stripe = stripe;
 760                 lo->ldo_stripes_allocated = stripe_len;
 761         }
 762
 763         RETURN(rc);
 764 }
 765
 766 /*
 767  * Parse striping information stored in lti_ea_store
 768  */
 769 int lod_parse_striping(const struct lu_env *env, struct lod_object *lo,
 770                        const struct lu_buf *buf)
 771 {
 772         struct lov_mds_md_v1    *lmm;
 773         struct lov_ost_data_v1  *objs;
 774         __u32                    magic;
 775         __u32                    pattern;
 776         int                      rc = 0;
 777         ENTRY;
 778
 779         LASSERT(buf);
 780         LASSERT(buf->lb_buf);
 781         LASSERT(buf->lb_len);
 782
 783         lmm = (struct lov_mds_md_v1 *) buf->lb_buf;
 784         magic = le32_to_cpu(lmm->lmm_magic);
 785         pattern = le32_to_cpu(lmm->lmm_pattern);
 786
 787         if (magic != LOV_MAGIC_V1 && magic != LOV_MAGIC_V3)
 788                 GOTO(out, rc = -EINVAL);
 789         if (lov_pattern(pattern) != LOV_PATTERN_RAID0)
 790                 GOTO(out, rc = -EINVAL);
 791
 792         lo->ldo_pattern = pattern;
 793         lo->ldo_stripe_size = le32_to_cpu(lmm->lmm_stripe_size);
 794         lo->ldo_layout_gen = le16_to_cpu(lmm->lmm_layout_gen);
 795         lo->ldo_stripenr = le16_to_cpu(lmm->lmm_stripe_count);
 796         /* released file stripenr fixup. */
 797         if (pattern & LOV_PATTERN_F_RELEASED)
 798                 lo->ldo_stripenr = 0;
 799
 800         LASSERT(buf->lb_len >= lov_mds_md_size(lo->ldo_stripenr, magic));
 801
 802         if (magic == LOV_MAGIC_V3) {
 803                 struct lov_mds_md_v3 *v3 = (struct lov_mds_md_v3 *) lmm;
 804                 objs = &v3->lmm_objects[0];
 805                 lod_object_set_pool(lo, v3->lmm_pool_name);
 806         } else {
 807                 objs = &lmm->lmm_objects[0];
 808         }
 809
 810         if (lo->ldo_stripenr > 0)
 811                 rc = lod_initialize_objects(env, lo, objs);
 812
 813 out:
 814         RETURN(rc);
 815 }
 816
 817 /*
 818  * Load and parse striping information, create in-core representation for the
 819  * stripes
 820  */
 821 int lod_load_striping(const struct lu_env *env, struct lod_object *lo)
 822 {
 823         struct lod_thread_info  *info = lod_env_info(env);
 824         struct dt_object        *next = dt_object_child(&lo->ldo_obj);
 825         int                      rc;
 826         ENTRY;
 827
 828         /*
 829          * currently this code is supposed to be called from declaration
 830          * phase only, thus the object is not expected to be locked by caller
 831          */
 832         dt_write_lock(env, next, 0);
 833         /* already initialized? */
 834         if (lo->ldo_stripe != NULL)
 835                 GOTO(out, rc = 0);
 836
 837         if (!dt_object_exists(next))
 838                 GOTO(out, rc = 0);
 839
 840         /* only regular files can be striped */
 841         if (!(lu_object_attr(lod2lu_obj(lo)) & S_IFREG))
 842                 GOTO(out, rc = 0);
 843
 844         rc = lod_get_lov_ea(env, lo);
 845         if (rc <= 0)
 846                 GOTO(out, rc);
 847
 848         /*
 849          * there is LOV EA (striping information) in this object
 850          * let's parse it and create in-core objects for the stripes
 851          */
 852         info->lti_buf.lb_buf = info->lti_ea_store;
 853         info->lti_buf.lb_len = info->lti_ea_store_size;
 854         rc = lod_parse_striping(env, lo, &info->lti_buf);
 855 out:
 856         dt_write_unlock(env, next);
 857         RETURN(rc);
 858 }
 859
 860 /* verify the striping information for directory */
 861 int lod_verify_striping(struct lod_device *d, const struct lu_buf *buf,
 862                         bool is_from_disk)
 863 {
 864         struct lov_user_md_v1   *lum;
 865         struct lov_user_md_v3   *lum3;
 866         struct pool_desc        *pool = NULL;
 867         __u32                    magic;
 868         __u32                    stripe_size;
 869         __u16                    stripe_count;
 870         __u16                    stripe_offset;
 871         size_t                   lum_size;
 872         int                      rc = 0;
 873         ENTRY;
 874
 875         lum = buf->lb_buf;
 876
 877         LASSERT(sizeof(*lum) < sizeof(*lum3));
 878
 879         if (buf->lb_len < sizeof(*lum)) {
 880                 CDEBUG(D_IOCTL, "buf len %zd too small for lov_user_md\n",
 881                        buf->lb_len);
 882                 GOTO(out, rc = -EINVAL);
 883         }
 884
 885         magic = le32_to_cpu(lum->lmm_magic);
 886         if (magic != LOV_USER_MAGIC_V1 &&
 887             magic != LOV_USER_MAGIC_V3 &&
 888             magic != LOV_MAGIC_V1_DEF &&
 889             magic != LOV_MAGIC_V3_DEF) {
 890                 CDEBUG(D_IOCTL, "bad userland LOV MAGIC: %#x\n", magic);
 891                 GOTO(out, rc = -EINVAL);
 892         }
 893
 894         /* the user uses "0" for default stripe pattern normally. */
 895         if (!is_from_disk && lum->lmm_pattern == 0)
 896                 lum->lmm_pattern = cpu_to_le32(LOV_PATTERN_RAID0);
 897
 898         if (le32_to_cpu(lum->lmm_pattern) != LOV_PATTERN_RAID0) {
 899                 CDEBUG(D_IOCTL, "bad userland stripe pattern: %#x\n",
 900                        le32_to_cpu(lum->lmm_pattern));
 901                 GOTO(out, rc = -EINVAL);
 902         }
 903
 904         /* 64kB is the largest common page size we see (ia64), and matches the
 905          * check in lfs */
 906         stripe_size = le32_to_cpu(lum->lmm_stripe_size);
 907         if (stripe_size & (LOV_MIN_STRIPE_SIZE - 1)) {
 908                 CDEBUG(D_IOCTL, "stripe size %u not a multiple of %u\n",
 909                        stripe_size, LOV_MIN_STRIPE_SIZE);
 910                 GOTO(out, rc = -EINVAL);
 911         }
 912
 913         /* an offset of -1 is treated as a "special" valid offset */
 914         stripe_offset = le16_to_cpu(lum->lmm_stripe_offset);
 915         if (stripe_offset != (typeof(stripe_offset))-1) {
 916                 /* if offset is not within valid range [0, osts_size) */
 917                 if (stripe_offset >= d->lod_osts_size) {
 918                         CDEBUG(D_IOCTL, "stripe offset %u >= bitmap size %u\n",
 919                                stripe_offset, d->lod_osts_size);
 920                         GOTO(out, rc = -EINVAL);
 921                 }
 922
 923                 /* if lmm_stripe_offset is *not* in bitmap */
 924                 if (!cfs_bitmap_check(d->lod_ost_bitmap, stripe_offset)) {
 925                         CDEBUG(D_IOCTL, "stripe offset %u not in bitmap\n",
 926                                stripe_offset);
 927                         GOTO(out, rc = -EINVAL);
 928                 }
 929         }
 930
 931         if (magic == LOV_USER_MAGIC_V1 || magic == LOV_MAGIC_V1_DEF)
 932                 lum_size = offsetof(struct lov_user_md_v1,
 933                                     lmm_objects[0]);
 934         else if (magic == LOV_USER_MAGIC_V3 || magic == LOV_MAGIC_V3_DEF)
 935                 lum_size = offsetof(struct lov_user_md_v3,
 936                                     lmm_objects[0]);
 937         else
 938                 GOTO(out, rc = -EINVAL);
 939
 940         stripe_count = le16_to_cpu(lum->lmm_stripe_count);
 941         if (buf->lb_len != lum_size) {
 942                 CDEBUG(D_IOCTL, "invalid buf len %zd for lov_user_md with "
 943                        "magic %#x and stripe_count %u\n",
 944                        buf->lb_len, magic, stripe_count);
 945                 GOTO(out, rc = -EINVAL);
 946         }
 947
 948         if (!(magic == LOV_USER_MAGIC_V3 || magic == LOV_MAGIC_V3_DEF))
 949                 goto out;
 950
 951         lum3 = buf->lb_buf;
 952         if (buf->lb_len < sizeof(*lum3)) {
 953                 CDEBUG(D_IOCTL, "buf len %zd too small for lov_user_md_v3\n",
 954                        buf->lb_len);
 955                 GOTO(out, rc = -EINVAL);
 956         }
 957
 958         /* In the function below, .hs_keycmp resolves to
 959          * pool_hashkey_keycmp() */
 960         /* coverity[overrun-buffer-val] */
 961         pool = lod_find_pool(d, lum3->lmm_pool_name);
 962         if (pool == NULL)
 963                 goto out;
 964
 965         if (stripe_offset != (typeof(stripe_offset))-1) {
 966                 rc = lod_check_index_in_pool(stripe_offset, pool);
 967                 if (rc < 0)
 968                         GOTO(out, rc = -EINVAL);
 969         }
 970
 971         if (is_from_disk && stripe_count > pool_tgt_count(pool)) {
 972                 CDEBUG(D_IOCTL,
 973                        "stripe count %u > # OSTs %u in the pool\n",
 974                        stripe_count, pool_tgt_count(pool));
 975                 GOTO(out, rc = -EINVAL);
 976         }
 977
 978 out:
 979         if (pool != NULL)
 980                 lod_pool_putref(pool);
 981
 982         RETURN(rc);
 983 }
 984
 985 void lod_fix_desc_stripe_size(__u64 *val)
 986 {
 987         if (*val < LOV_MIN_STRIPE_SIZE) {
 988                 if (*val != 0)
 989                         LCONSOLE_INFO("Increasing default stripe size to "
 990                                       "minimum value %u\n",
 991                                       LOV_DEFAULT_STRIPE_SIZE);
 992                 *val = LOV_DEFAULT_STRIPE_SIZE;
 993         } else if (*val & (LOV_MIN_STRIPE_SIZE - 1)) {
 994                 *val &= ~(LOV_MIN_STRIPE_SIZE - 1);
 995                 LCONSOLE_WARN("Changing default stripe size to "LPU64" (a "
 996                               "multiple of %u)\n",
 997                               *val, LOV_MIN_STRIPE_SIZE);
 998         }
 999 }
1000
1001 void lod_fix_desc_stripe_count(__u32 *val)
1002 {
1003         if (*val == 0)
1004                 *val = 1;
1005 }
1006
1007 void lod_fix_desc_pattern(__u32 *val)
1008 {
1009         /* from lov_setstripe */
1010         if ((*val != 0) && (*val != LOV_PATTERN_RAID0)) {
1011                 LCONSOLE_WARN("Unknown stripe pattern: %#x\n", *val);
1012                 *val = 0;
1013         }
1014 }
1015
1016 void lod_fix_desc_qos_maxage(__u32 *val)
1017 {
1018         /* fix qos_maxage */
1019         if (*val == 0)
1020                 *val = QOS_DEFAULT_MAXAGE;
1021 }
1022
1023 void lod_fix_desc(struct lov_desc *desc)
1024 {
1025         lod_fix_desc_stripe_size(&desc->ld_default_stripe_size);
1026         lod_fix_desc_stripe_count(&desc->ld_default_stripe_count);
1027         lod_fix_desc_pattern(&desc->ld_pattern);
1028         lod_fix_desc_qos_maxage(&desc->ld_qos_maxage);
1029 }
1030
1031 int lod_pools_init(struct lod_device *lod, struct lustre_cfg *lcfg)
1032 {
1033         struct obd_device          *obd;
1034         struct lov_desc            *desc;
1035         int                         rc;
1036         ENTRY;
1037
1038         obd = class_name2obd(lustre_cfg_string(lcfg, 0));
1039         LASSERT(obd != NULL);
1040         obd->obd_lu_dev = &lod->lod_dt_dev.dd_lu_dev;
1041
1042         if (LUSTRE_CFG_BUFLEN(lcfg, 1) < 1) {
1043                 CERROR("LOD setup requires a descriptor\n");
1044                 RETURN(-EINVAL);
1045         }
1046
1047         desc = (struct lov_desc *)lustre_cfg_buf(lcfg, 1);
1048
1049         if (sizeof(*desc) > LUSTRE_CFG_BUFLEN(lcfg, 1)) {
1050                 CERROR("descriptor size wrong: %d > %d\n",
1051                        (int)sizeof(*desc), LUSTRE_CFG_BUFLEN(lcfg, 1));
1052                 RETURN(-EINVAL);
1053         }
1054
1055         if (desc->ld_magic != LOV_DESC_MAGIC) {
1056                 if (desc->ld_magic == __swab32(LOV_DESC_MAGIC)) {
1057                         CDEBUG(D_OTHER, "%s: Swabbing lov desc %p\n",
1058                                obd->obd_name, desc);
1059                         lustre_swab_lov_desc(desc);
1060                 } else {
1061                         CERROR("%s: Bad lov desc magic: %#x\n",
1062                                obd->obd_name, desc->ld_magic);
1063                         RETURN(-EINVAL);
1064                 }
1065         }
1066
1067         lod_fix_desc(desc);
1068
1069         desc->ld_active_tgt_count = 0;
1070         lod->lod_desc = *desc;
1071
1072         lod->lod_sp_me = LUSTRE_SP_CLI;
1073
1074         /* Set up allocation policy (QoS and RR) */
1075         CFS_INIT_LIST_HEAD(&lod->lod_qos.lq_oss_list);
1076         init_rwsem(&lod->lod_qos.lq_rw_sem);
1077         lod->lod_qos.lq_dirty = 1;
1078         lod->lod_qos.lq_rr.lqr_dirty = 1;
1079         lod->lod_qos.lq_reset = 1;
1080         /* Default priority is toward free space balance */
1081         lod->lod_qos.lq_prio_free = 232;
1082         /* Default threshold for rr (roughly 17%) */
1083         lod->lod_qos.lq_threshold_rr = 43;
1084         /* Init statfs fields */
1085         OBD_ALLOC_PTR(lod->lod_qos.lq_statfs_data);
1086         if (NULL == lod->lod_qos.lq_statfs_data)
1087                 RETURN(-ENOMEM);
1088         init_waitqueue_head(&lod->lod_qos.lq_statfs_waitq);
1089
1090         /* Set up OST pool environment */
1091         lod->lod_pools_hash_body = cfs_hash_create("POOLS", HASH_POOLS_CUR_BITS,
1092                                                    HASH_POOLS_MAX_BITS,
1093                                                    HASH_POOLS_BKT_BITS, 0,
1094                                                    CFS_HASH_MIN_THETA,
1095                                                    CFS_HASH_MAX_THETA,
1096                                                    &pool_hash_operations,
1097                                                    CFS_HASH_DEFAULT);
1098         if (!lod->lod_pools_hash_body)
1099                 GOTO(out_statfs, rc = -ENOMEM);
1100         CFS_INIT_LIST_HEAD(&lod->lod_pool_list);
1101         lod->lod_pool_count = 0;
1102         rc = lod_ost_pool_init(&lod->lod_pool_info, 0);
1103         if (rc)
1104                 GOTO(out_hash, rc);
1105         rc = lod_ost_pool_init(&lod->lod_qos.lq_rr.lqr_pool, 0);
1106         if (rc)
1107                 GOTO(out_pool_info, rc);
1108
1109         RETURN(0);
1110
1111 out_pool_info:
1112         lod_ost_pool_free(&lod->lod_pool_info);
1113 out_hash:
1114         cfs_hash_putref(lod->lod_pools_hash_body);
1115 out_statfs:
1116         OBD_FREE_PTR(lod->lod_qos.lq_statfs_data);
1117         return rc;
1118 }
1119
1120 int lod_pools_fini(struct lod_device *lod)
1121 {
1122         struct obd_device   *obd = lod2obd(lod);
1123         cfs_list_t          *pos, *tmp;
1124         struct pool_desc    *pool;
1125         ENTRY;
1126
1127         cfs_list_for_each_safe(pos, tmp, &lod->lod_pool_list) {
1128                 pool = cfs_list_entry(pos, struct pool_desc, pool_list);
1129                 /* free pool structs */
1130                 CDEBUG(D_INFO, "delete pool %p\n", pool);
1131                 /* In the function below, .hs_keycmp resolves to
1132                  * pool_hashkey_keycmp() */
1133                 /* coverity[overrun-buffer-val] */
1134                 lod_pool_del(obd, pool->pool_name);
1135         }
1136
1137         cfs_hash_putref(lod->lod_pools_hash_body);
1138         lod_ost_pool_free(&(lod->lod_qos.lq_rr.lqr_pool));
1139         lod_ost_pool_free(&lod->lod_pool_info);
1140         OBD_FREE_PTR(lod->lod_qos.lq_statfs_data);
1141         RETURN(0);
1142 }
1143