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 <lustre_lfsck.h>
  38 #include <lustre_lmv.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                 struct list_head kill;
  71                 unsigned int idx;
  72
  73                 CDEBUG(D_CONFIG, "destroying %d ltd desc\n",
  74                        ltd->ltd_death_row);
  75
  76                 INIT_LIST_HEAD(&kill);
  77
  78                 cfs_foreach_bit(ltd->ltd_tgt_bitmap, idx) {
  79                         tgt_desc = LTD_TGT(ltd, idx);
  80                         LASSERT(tgt_desc);
  81
  82                         if (!tgt_desc->ltd_reap)
  83                                 continue;
  84
  85                         list_add(&tgt_desc->ltd_kill, &kill);
  86                         LTD_TGT(ltd, idx) = NULL;
  87                         /*FIXME: only support ost pool for now */
  88                         if (ltd == &lod->lod_ost_descs) {
  89                                 lod_ost_pool_remove(&lod->lod_pool_info, idx);
  90                                 if (tgt_desc->ltd_active)
  91                                         lod->lod_desc.ld_active_tgt_count--;
  92                         }
  93                         ltd->ltd_tgtnr--;
  94                         cfs_bitmap_clear(ltd->ltd_tgt_bitmap, idx);
  95                         ltd->ltd_death_row--;
  96                 }
  97                 mutex_unlock(&ltd->ltd_mutex);
  98                 up_read(&ltd->ltd_rw_sem);
  99
 100                 list_for_each_entry_safe(tgt_desc, tmp, &kill, ltd_kill) {
 101                         int rc;
 102                         list_del(&tgt_desc->ltd_kill);
 103                         if (ltd == &lod->lod_ost_descs) {
 104                                 /* remove from QoS structures */
 105                                 rc = qos_del_tgt(lod, tgt_desc);
 106                                 if (rc)
 107                                         CERROR("%s: qos_del_tgt(%s) failed:"
 108                                                "rc = %d\n",
 109                                                lod2obd(lod)->obd_name,
 110                                               obd_uuid2str(&tgt_desc->ltd_uuid),
 111                                                rc);
 112                         }
 113                         rc = obd_disconnect(tgt_desc->ltd_exp);
 114                         if (rc)
 115                                 CERROR("%s: failed to disconnect %s: rc = %d\n",
 116                                        lod2obd(lod)->obd_name,
 117                                        obd_uuid2str(&tgt_desc->ltd_uuid), rc);
 118                         OBD_FREE_PTR(tgt_desc);
 119                 }
 120         } else {
 121                 mutex_unlock(&ltd->ltd_mutex);
 122                 up_read(&ltd->ltd_rw_sem);
 123         }
 124 }
 125
 126 static int ltd_bitmap_resize(struct lod_tgt_descs *ltd, __u32 newsize)
 127 {
 128         cfs_bitmap_t *new_bitmap, *old_bitmap = NULL;
 129         int           rc = 0;
 130         ENTRY;
 131
 132         /* grab write reference on the lod. Relocating the array requires
 133          * exclusive access */
 134
 135         down_write(&ltd->ltd_rw_sem);
 136         if (newsize <= ltd->ltd_tgts_size)
 137                 /* someone else has already resize the array */
 138                 GOTO(out, rc = 0);
 139
 140         /* allocate new bitmap */
 141         new_bitmap = CFS_ALLOCATE_BITMAP(newsize);
 142         if (!new_bitmap)
 143                 GOTO(out, rc = -ENOMEM);
 144
 145         if (ltd->ltd_tgts_size > 0) {
 146                 /* the bitmap already exists, we need
 147                  * to copy data from old one */
 148                 cfs_bitmap_copy(new_bitmap, ltd->ltd_tgt_bitmap);
 149                 old_bitmap = ltd->ltd_tgt_bitmap;
 150         }
 151
 152         ltd->ltd_tgts_size  = newsize;
 153         ltd->ltd_tgt_bitmap = new_bitmap;
 154
 155         if (old_bitmap)
 156                 CFS_FREE_BITMAP(old_bitmap);
 157
 158         CDEBUG(D_CONFIG, "tgt size: %d\n", ltd->ltd_tgts_size);
 159
 160         EXIT;
 161 out:
 162         up_write(&ltd->ltd_rw_sem);
 163         return rc;
 164 }
 165
 166 /*
 167  * Connect LOD to a new OSP and add it to the device table.
 168  *
 169  * \param env - is the environment passed by the caller
 170  * \param lod - is the LOD device to be connected to the new OSP
 171  * \param osp - is the name of OSP device name about to be added
 172  * \param index - is the OSP index
 173  * \param gen - is the generation number
 174  * \param tgt_index - is the group of the OSP.
 175  * \param type - is the type of device (mdc or osc)
 176  */
 177 int lod_add_device(const struct lu_env *env, struct lod_device *lod,
 178                    char *osp, unsigned index, unsigned gen, int tgt_index,
 179                    char *type, int active)
 180 {
 181         struct obd_connect_data *data = NULL;
 182         struct obd_export       *exp = NULL;
 183         struct obd_device       *obd;
 184         struct lu_device        *ldev;
 185         struct dt_device        *d;
 186         int                      rc;
 187         struct lod_tgt_desc     *tgt_desc;
 188         struct lod_tgt_descs    *ltd;
 189         struct obd_uuid         obd_uuid;
 190         bool                    for_ost;
 191         ENTRY;
 192
 193         CDEBUG(D_CONFIG, "osp:%s idx:%d gen:%d\n", osp, index, gen);
 194
 195         if (gen <= 0) {
 196                 CERROR("request to add OBD %s with invalid generation: %d\n",
 197                        osp, gen);
 198                 RETURN(-EINVAL);
 199         }
 200
 201         obd_str2uuid(&obd_uuid, osp);
 202
 203         obd = class_find_client_obd(&obd_uuid, LUSTRE_OSP_NAME,
 204                                 &lod->lod_dt_dev.dd_lu_dev.ld_obd->obd_uuid);
 205         if (obd == NULL) {
 206                 CERROR("can't find %s device\n", osp);
 207                 RETURN(-EINVAL);
 208         }
 209
 210         OBD_ALLOC_PTR(data);
 211         if (data == NULL)
 212                 RETURN(-ENOMEM);
 213
 214         data->ocd_connect_flags = OBD_CONNECT_INDEX | OBD_CONNECT_VERSION;
 215         data->ocd_version = LUSTRE_VERSION_CODE;
 216         data->ocd_index = index;
 217
 218         if (strcmp(LUSTRE_OSC_NAME, type) == 0) {
 219                 for_ost = true;
 220                 data->ocd_connect_flags |= OBD_CONNECT_AT |
 221                                            OBD_CONNECT_FULL20 |
 222                                            OBD_CONNECT_INDEX |
 223 #ifdef HAVE_LRU_RESIZE_SUPPORT
 224                                            OBD_CONNECT_LRU_RESIZE |
 225 #endif
 226                                            OBD_CONNECT_MDS |
 227                                            OBD_CONNECT_OSS_CAPA |
 228                                            OBD_CONNECT_REQPORTAL |
 229                                            OBD_CONNECT_SKIP_ORPHAN |
 230                                            OBD_CONNECT_FID |
 231                                            OBD_CONNECT_LVB_TYPE |
 232                                            OBD_CONNECT_VERSION |
 233                                            OBD_CONNECT_PINGLESS |
 234                                            OBD_CONNECT_LFSCK;
 235
 236                 data->ocd_group = tgt_index;
 237                 ltd = &lod->lod_ost_descs;
 238         } else {
 239                 struct obd_import *imp = obd->u.cli.cl_import;
 240
 241                 for_ost = false;
 242                 data->ocd_ibits_known = MDS_INODELOCK_UPDATE;
 243                 data->ocd_connect_flags |= OBD_CONNECT_ACL |
 244                                            OBD_CONNECT_MDS_CAPA |
 245                                            OBD_CONNECT_OSS_CAPA |
 246                                            OBD_CONNECT_IBITS |
 247                                            OBD_CONNECT_MDS_MDS |
 248                                            OBD_CONNECT_FID |
 249                                            OBD_CONNECT_AT |
 250                                            OBD_CONNECT_FULL20 |
 251                                            OBD_CONNECT_LFSCK;
 252                 /* XXX set MDS-MDS flags, remove this when running this
 253                  * on client*/
 254                 data->ocd_connect_flags |= OBD_CONNECT_MDS_MDS;
 255                 spin_lock(&imp->imp_lock);
 256                 imp->imp_server_timeout = 1;
 257                 spin_unlock(&imp->imp_lock);
 258                 imp->imp_client->cli_request_portal = OUT_PORTAL;
 259                 CDEBUG(D_OTHER, "%s: Set 'mds' portal and timeout\n",
 260                       obd->obd_name);
 261                 ltd = &lod->lod_mdt_descs;
 262         }
 263
 264         rc = obd_connect(env, &exp, obd, &obd->obd_uuid, data, NULL);
 265         OBD_FREE_PTR(data);
 266         if (rc) {
 267                 CERROR("%s: cannot connect to next dev %s (%d)\n",
 268                        obd->obd_name, osp, rc);
 269                 GOTO(out_free, rc);
 270         }
 271
 272         LASSERT(obd->obd_lu_dev);
 273         LASSERT(obd->obd_lu_dev->ld_site == lod->lod_dt_dev.dd_lu_dev.ld_site);
 274
 275         ldev = obd->obd_lu_dev;
 276         d = lu2dt_dev(ldev);
 277
 278         /* Allocate ost descriptor and fill it */
 279         OBD_ALLOC_PTR(tgt_desc);
 280         if (!tgt_desc)
 281                 GOTO(out_conn, rc = -ENOMEM);
 282
 283         tgt_desc->ltd_tgt    = d;
 284         tgt_desc->ltd_exp    = exp;
 285         tgt_desc->ltd_uuid   = obd->u.cli.cl_target_uuid;
 286         tgt_desc->ltd_gen    = gen;
 287         tgt_desc->ltd_index  = index;
 288         tgt_desc->ltd_active = active;
 289
 290         lod_getref(ltd);
 291         if (index >= ltd->ltd_tgts_size) {
 292                 /* we have to increase the size of the lod_osts array */
 293                 __u32  newsize;
 294
 295                 newsize = max(ltd->ltd_tgts_size, (__u32)2);
 296                 while (newsize < index + 1)
 297                         newsize = newsize << 1;
 298
 299                 /* lod_bitmap_resize() needs lod_rw_sem
 300                  * which we hold with th reference */
 301                 lod_putref(lod, ltd);
 302
 303                 rc = ltd_bitmap_resize(ltd, newsize);
 304                 if (rc)
 305                         GOTO(out_desc, rc);
 306
 307                 lod_getref(ltd);
 308         }
 309
 310         mutex_lock(&ltd->ltd_mutex);
 311         if (cfs_bitmap_check(ltd->ltd_tgt_bitmap, index)) {
 312                 CERROR("%s: device %d is registered already\n", obd->obd_name,
 313                        index);
 314                 GOTO(out_mutex, rc = -EEXIST);
 315         }
 316
 317         if (ltd->ltd_tgt_idx[index / TGT_PTRS_PER_BLOCK] == NULL) {
 318                 OBD_ALLOC_PTR(ltd->ltd_tgt_idx[index / TGT_PTRS_PER_BLOCK]);
 319                 if (ltd->ltd_tgt_idx[index / TGT_PTRS_PER_BLOCK] == NULL) {
 320                         CERROR("can't allocate index to add %s\n",
 321                                obd->obd_name);
 322                         GOTO(out_mutex, rc = -ENOMEM);
 323                 }
 324         }
 325
 326         if (!strcmp(LUSTRE_OSC_NAME, type)) {
 327                 /* pool and qos are not supported for MDS stack yet */
 328                 rc = lod_ost_pool_add(&lod->lod_pool_info, index,
 329                                       lod->lod_osts_size);
 330                 if (rc) {
 331                         CERROR("%s: can't set up pool, failed with %d\n",
 332                                obd->obd_name, rc);
 333                         GOTO(out_mutex, rc);
 334                 }
 335
 336                 rc = qos_add_tgt(lod, tgt_desc);
 337                 if (rc) {
 338                         CERROR("%s: qos_add_tgt failed with %d\n",
 339                                 obd->obd_name, rc);
 340                         GOTO(out_pool, rc);
 341                 }
 342
 343                 /* The new OST is now a full citizen */
 344                 if (index >= lod->lod_desc.ld_tgt_count)
 345                         lod->lod_desc.ld_tgt_count = index + 1;
 346                 if (active)
 347                         lod->lod_desc.ld_active_tgt_count++;
 348         }
 349
 350         LTD_TGT(ltd, index) = tgt_desc;
 351         cfs_bitmap_set(ltd->ltd_tgt_bitmap, index);
 352         ltd->ltd_tgtnr++;
 353         mutex_unlock(&ltd->ltd_mutex);
 354         lod_putref(lod, ltd);
 355         if (lod->lod_recovery_completed)
 356                 ldev->ld_ops->ldo_recovery_complete(env, ldev);
 357
 358         rc = lfsck_add_target(env, lod->lod_child, d, exp, index, for_ost);
 359         if (rc != 0)
 360                 CERROR("Fail to add LFSCK target: name = %s, type = %s, "
 361                        "index = %u, rc = %d\n", osp, type, index, rc);
 362
 363         RETURN(rc);
 364
 365 out_pool:
 366         lod_ost_pool_remove(&lod->lod_pool_info, index);
 367 out_mutex:
 368         mutex_unlock(&ltd->ltd_mutex);
 369         lod_putref(lod, ltd);
 370 out_desc:
 371         OBD_FREE_PTR(tgt_desc);
 372 out_conn:
 373         obd_disconnect(exp);
 374 out_free:
 375         return rc;
 376 }
 377
 378 /*
 379  * helper function to schedule OST removal from the device table
 380  */
 381 static void __lod_del_device(const struct lu_env *env, struct lod_device *lod,
 382                              struct lod_tgt_descs *ltd, unsigned idx,
 383                              bool for_ost)
 384 {
 385         LASSERT(LTD_TGT(ltd, idx));
 386
 387         lfsck_del_target(env, lod->lod_child, LTD_TGT(ltd, idx)->ltd_tgt,
 388                          idx, for_ost);
 389
 390         if (LTD_TGT(ltd, idx)->ltd_reap == 0) {
 391                 LTD_TGT(ltd, idx)->ltd_reap = 1;
 392                 ltd->ltd_death_row++;
 393         }
 394 }
 395
 396 int lod_fini_tgt(const struct lu_env *env, struct lod_device *lod,
 397                  struct lod_tgt_descs *ltd, bool for_ost)
 398 {
 399         unsigned int idx;
 400
 401         if (ltd->ltd_tgts_size <= 0)
 402                 return 0;
 403         lod_getref(ltd);
 404         mutex_lock(&ltd->ltd_mutex);
 405         cfs_foreach_bit(ltd->ltd_tgt_bitmap, idx)
 406                 __lod_del_device(env, lod, ltd, idx, for_ost);
 407         mutex_unlock(&ltd->ltd_mutex);
 408         lod_putref(lod, ltd);
 409         CFS_FREE_BITMAP(ltd->ltd_tgt_bitmap);
 410         for (idx = 0; idx < TGT_PTRS; idx++) {
 411                 if (ltd->ltd_tgt_idx[idx])
 412                         OBD_FREE_PTR(ltd->ltd_tgt_idx[idx]);
 413         }
 414         ltd->ltd_tgts_size = 0;
 415         return 0;
 416 }
 417
 418 /*
 419  * Add support for administratively disabled OST (through the MGS).
 420  * Schedule a target for deletion.  Disconnection and real removal from the
 421  * table takes place in lod_putref() once the last table user release its
 422  * reference.
 423  *
 424  * \param env - is the environment passed by the caller
 425  * \param lod - is the lod device currently connected to the OSP about to be
 426  *              removed
 427  * \param osp - is the name of OSP device about to be removed
 428  * \param idx - is the OSP index
 429  * \param gen - is the generation number, not used currently
 430  */
 431 int lod_del_device(const struct lu_env *env, struct lod_device *lod,
 432                    struct lod_tgt_descs *ltd, char *osp, unsigned idx,
 433                    unsigned gen, bool for_ost)
 434 {
 435         struct obd_device *obd;
 436         int                rc = 0;
 437         struct obd_uuid    uuid;
 438         ENTRY;
 439
 440         CDEBUG(D_CONFIG, "osp:%s idx:%d gen:%d\n", osp, idx, gen);
 441
 442         obd_str2uuid(&uuid, osp);
 443
 444         obd = class_find_client_obd(&uuid, LUSTRE_OSP_NAME,
 445                                    &lod->lod_dt_dev.dd_lu_dev.ld_obd->obd_uuid);
 446         if (obd == NULL) {
 447                 CERROR("can't find %s device\n", osp);
 448                 RETURN(-EINVAL);
 449         }
 450
 451         if (gen <= 0) {
 452                 CERROR("%s: request to remove OBD %s with invalid generation %d"
 453                        "\n", obd->obd_name, osp, gen);
 454                 RETURN(-EINVAL);
 455         }
 456
 457         obd_str2uuid(&uuid,  osp);
 458
 459         lod_getref(ltd);
 460         mutex_lock(&ltd->ltd_mutex);
 461         /* check that the index is allocated in the bitmap */
 462         if (!cfs_bitmap_check(ltd->ltd_tgt_bitmap, idx) ||
 463             !LTD_TGT(ltd, idx)) {
 464                 CERROR("%s: device %d is not set up\n", obd->obd_name, idx);
 465                 GOTO(out, rc = -EINVAL);
 466         }
 467
 468         /* check that the UUID matches */
 469         if (!obd_uuid_equals(&uuid, &LTD_TGT(ltd, idx)->ltd_uuid)) {
 470                 CERROR("%s: LOD target UUID %s at index %d does not match %s\n",
 471                        obd->obd_name, obd_uuid2str(&LTD_TGT(ltd,idx)->ltd_uuid),
 472                        idx, osp);
 473                 GOTO(out, rc = -EINVAL);
 474         }
 475
 476         __lod_del_device(env, lod, ltd, idx, for_ost);
 477         EXIT;
 478 out:
 479         mutex_unlock(&ltd->ltd_mutex);
 480         lod_putref(lod, ltd);
 481         return(rc);
 482 }
 483
 484 int lod_ea_store_resize(struct lod_thread_info *info, size_t size)
 485 {
 486         __u32 round = size_roundup_power2(size);
 487
 488         LASSERT(round <=
 489                 lov_mds_md_size(LOV_MAX_STRIPE_COUNT, LOV_MAGIC_V3));
 490         if (info->lti_ea_store) {
 491                 LASSERT(info->lti_ea_store_size);
 492                 LASSERT(info->lti_ea_store_size < round);
 493                 CDEBUG(D_INFO, "EA store size %d is not enough, need %d\n",
 494                        info->lti_ea_store_size, round);
 495                 OBD_FREE_LARGE(info->lti_ea_store, info->lti_ea_store_size);
 496                 info->lti_ea_store = NULL;
 497                 info->lti_ea_store_size = 0;
 498         }
 499
 500         OBD_ALLOC_LARGE(info->lti_ea_store, round);
 501         if (info->lti_ea_store == NULL)
 502                 RETURN(-ENOMEM);
 503         info->lti_ea_store_size = round;
 504         RETURN(0);
 505 }
 506
 507 /*
 508  * generate and write LOV EA for given striped object
 509  */
 510 int lod_generate_and_set_lovea(const struct lu_env *env,
 511                                struct lod_object *lo, struct thandle *th)
 512 {
 513         struct lod_thread_info  *info = lod_env_info(env);
 514         struct dt_object        *next = dt_object_child(&lo->ldo_obj);
 515         const struct lu_fid     *fid  = lu_object_fid(&lo->ldo_obj.do_lu);
 516         struct lov_mds_md_v1    *lmm;
 517         struct lov_ost_data_v1  *objs;
 518         __u32                    magic;
 519         int                      i, rc;
 520         size_t                   lmm_size;
 521         ENTRY;
 522
 523         LASSERT(lo);
 524
 525         magic = lo->ldo_pool != NULL ? LOV_MAGIC_V3 : LOV_MAGIC_V1;
 526         lmm_size = lov_mds_md_size(lo->ldo_stripenr, magic);
 527         if (info->lti_ea_store_size < lmm_size) {
 528                 rc = lod_ea_store_resize(info, lmm_size);
 529                 if (rc)
 530                         RETURN(rc);
 531         }
 532
 533         if (lo->ldo_pattern == 0) /* default striping */
 534                 lo->ldo_pattern = LOV_PATTERN_RAID0;
 535
 536         lmm = info->lti_ea_store;
 537
 538         lmm->lmm_magic = cpu_to_le32(magic);
 539         lmm->lmm_pattern = cpu_to_le32(lo->ldo_pattern);
 540         fid_to_lmm_oi(fid, &lmm->lmm_oi);
 541         if (OBD_FAIL_CHECK(OBD_FAIL_LFSCK_BAD_LMMOI))
 542                 lmm->lmm_oi.oi.oi_id++;
 543         lmm_oi_cpu_to_le(&lmm->lmm_oi, &lmm->lmm_oi);
 544         lmm->lmm_stripe_size = cpu_to_le32(lo->ldo_stripe_size);
 545         lmm->lmm_stripe_count = cpu_to_le16(lo->ldo_stripenr);
 546         if (lo->ldo_pattern & LOV_PATTERN_F_RELEASED)
 547                 lmm->lmm_stripe_count = cpu_to_le16(lo->ldo_released_stripenr);
 548         lmm->lmm_layout_gen = 0;
 549         if (magic == LOV_MAGIC_V1) {
 550                 objs = &lmm->lmm_objects[0];
 551         } else {
 552                 struct lov_mds_md_v3 *v3 = (struct lov_mds_md_v3 *) lmm;
 553                 size_t cplen = strlcpy(v3->lmm_pool_name, lo->ldo_pool,
 554                                 sizeof(v3->lmm_pool_name));
 555                 if (cplen >= sizeof(v3->lmm_pool_name))
 556                         RETURN(-E2BIG);
 557                 objs = &v3->lmm_objects[0];
 558         }
 559
 560         for (i = 0; i < lo->ldo_stripenr; i++) {
 561                 struct lu_fid           *fid    = &info->lti_fid;
 562                 struct lod_device       *lod;
 563                 __u32                   index;
 564                 int                     type    = LU_SEQ_RANGE_OST;
 565
 566                 lod = lu2lod_dev(lo->ldo_obj.do_lu.lo_dev);
 567                 LASSERT(lo->ldo_stripe[i]);
 568
 569                 *fid = *lu_object_fid(&lo->ldo_stripe[i]->do_lu);
 570                 if (OBD_FAIL_CHECK(OBD_FAIL_LFSCK_MULTIPLE_REF)) {
 571                         if (cfs_fail_val == 0)
 572                                 cfs_fail_val = fid->f_oid;
 573                         else
 574                                 fid->f_oid = cfs_fail_val;
 575                 }
 576
 577                 rc = fid_to_ostid(fid, &info->lti_ostid);
 578                 LASSERT(rc == 0);
 579
 580                 ostid_cpu_to_le(&info->lti_ostid, &objs[i].l_ost_oi);
 581                 objs[i].l_ost_gen    = cpu_to_le32(0);
 582                 rc = lod_fld_lookup(env, lod, fid, &index, &type);
 583                 if (rc < 0) {
 584                         CERROR("%s: Can not locate "DFID": rc = %d\n",
 585                                lod2obd(lod)->obd_name, PFID(fid), rc);
 586                         lod_object_free_striping(env, lo);
 587                         RETURN(rc);
 588                 }
 589                 objs[i].l_ost_idx = cpu_to_le32(index);
 590         }
 591
 592         info->lti_buf.lb_buf = lmm;
 593         info->lti_buf.lb_len = lmm_size;
 594         rc = dt_xattr_set(env, next, &info->lti_buf, XATTR_NAME_LOV, 0,
 595                           th, BYPASS_CAPA);
 596         if (rc < 0)
 597                 lod_object_free_striping(env, lo);
 598
 599         RETURN(rc);
 600 }
 601
 602 int lod_get_ea(const struct lu_env *env, struct lod_object *lo,
 603                const char *name)
 604 {
 605         struct lod_thread_info  *info = lod_env_info(env);
 606         struct dt_object        *next = dt_object_child(&lo->ldo_obj);
 607         int                     rc;
 608         ENTRY;
 609
 610         LASSERT(info);
 611
 612         if (unlikely(info->lti_ea_store == NULL)) {
 613                 /* just to enter in allocation block below */
 614                 rc = -ERANGE;
 615         } else {
 616 repeat:
 617                 info->lti_buf.lb_buf = info->lti_ea_store;
 618                 info->lti_buf.lb_len = info->lti_ea_store_size;
 619                 rc = dt_xattr_get(env, next, &info->lti_buf, name, BYPASS_CAPA);
 620         }
 621
 622         /* if object is not striped or inaccessible */
 623         if (rc == -ENODATA || rc == -ENOENT)
 624                 RETURN(0);
 625
 626         if (rc == -ERANGE) {
 627                 /* EA doesn't fit, reallocate new buffer */
 628                 rc = dt_xattr_get(env, next, &LU_BUF_NULL, name,
 629                                   BYPASS_CAPA);
 630                 if (rc == -ENODATA || rc == -ENOENT)
 631                         RETURN(0);
 632                 else if (rc < 0)
 633                         RETURN(rc);
 634
 635                 LASSERT(rc > 0);
 636                 rc = lod_ea_store_resize(info, rc);
 637                 if (rc)
 638                         RETURN(rc);
 639                 goto repeat;
 640         }
 641
 642         RETURN(rc);
 643 }
 644
 645 int lod_store_def_striping(const struct lu_env *env, struct dt_object *dt,
 646                            struct thandle *th)
 647 {
 648         struct lod_thread_info  *info = lod_env_info(env);
 649         struct lod_object       *lo = lod_dt_obj(dt);
 650         struct dt_object        *next = dt_object_child(dt);
 651         struct lov_user_md_v3   *v3;
 652         int                      rc;
 653         ENTRY;
 654
 655         if (S_ISDIR(dt->do_lu.lo_header->loh_attr))
 656                 RETURN(-ENOTDIR);
 657         /*
 658          * store striping defaults into new directory
 659          * used to implement defaults inheritance
 660          */
 661
 662         /* probably nothing to inherite */
 663         if (lo->ldo_striping_cached == 0)
 664                 RETURN(0);
 665
 666         if (LOVEA_DELETE_VALUES(lo->ldo_def_stripe_size, lo->ldo_def_stripenr,
 667                                 lo->ldo_def_stripe_offset))
 668                 RETURN(0);
 669
 670         v3 = info->lti_ea_store;
 671         if (info->lti_ea_store_size < sizeof(*v3)) {
 672                 rc = lod_ea_store_resize(info, sizeof(*v3));
 673                 if (rc != 0)
 674                         RETURN(rc);
 675                 v3 = info->lti_ea_store;
 676         }
 677         memset(v3, 0, sizeof(*v3));
 678         v3->lmm_magic = cpu_to_le32(LOV_USER_MAGIC_V3);
 679         v3->lmm_stripe_count = cpu_to_le16(lo->ldo_def_stripenr);
 680         v3->lmm_stripe_offset = cpu_to_le16(lo->ldo_def_stripe_offset);
 681         v3->lmm_stripe_size = cpu_to_le32(lo->ldo_def_stripe_size);
 682         if (lo->ldo_pool != NULL)
 683                 strlcpy(v3->lmm_pool_name, lo->ldo_pool,
 684                         sizeof(v3->lmm_pool_name));
 685         info->lti_buf.lb_buf = v3;
 686         info->lti_buf.lb_len = sizeof(*v3);
 687         rc = dt_xattr_set(env, next, &info->lti_buf, XATTR_NAME_LOV, 0, th,
 688                         BYPASS_CAPA);
 689
 690         RETURN(rc);
 691 }
 692
 693 static int validate_lod_and_idx(struct lod_device *md, __u32 idx)
 694 {
 695         if (unlikely(idx >= md->lod_ost_descs.ltd_tgts_size ||
 696                      !cfs_bitmap_check(md->lod_ost_bitmap, idx))) {
 697                 CERROR("%s: bad idx: %d of %d\n", lod2obd(md)->obd_name, idx,
 698                        md->lod_ost_descs.ltd_tgts_size);
 699                 return -EINVAL;
 700         }
 701
 702         if (unlikely(OST_TGT(md, idx) == NULL)) {
 703                 CERROR("%s: bad lod_tgt_desc for idx: %d\n",
 704                        lod2obd(md)->obd_name, idx);
 705                 return -EINVAL;
 706         }
 707
 708         if (unlikely(OST_TGT(md, idx)->ltd_ost == NULL)) {
 709                 CERROR("%s: invalid lod device, for idx: %d\n",
 710                        lod2obd(md)->obd_name , idx);
 711                 return -EINVAL;
 712         }
 713
 714         return 0;
 715 }
 716
 717 /*
 718  * allocate array of objects pointers, find/create objects
 719  * stripenr and other fields should be initialized by this moment
 720  */
 721 int lod_initialize_objects(const struct lu_env *env, struct lod_object *lo,
 722                            struct lov_ost_data_v1 *objs)
 723 {
 724         struct lod_thread_info  *info = lod_env_info(env);
 725         struct lod_device       *md;
 726         struct lu_object        *o, *n;
 727         struct lu_device        *nd;
 728         struct dt_object       **stripe;
 729         int                      stripe_len;
 730         int                      i, rc = 0;
 731         __u32                   idx;
 732         ENTRY;
 733
 734         LASSERT(lo != NULL);
 735         md = lu2lod_dev(lo->ldo_obj.do_lu.lo_dev);
 736         LASSERT(lo->ldo_stripe == NULL);
 737         LASSERT(lo->ldo_stripenr > 0);
 738         LASSERT(lo->ldo_stripe_size > 0);
 739
 740         stripe_len = lo->ldo_stripenr;
 741         OBD_ALLOC(stripe, sizeof(stripe[0]) * stripe_len);
 742         if (stripe == NULL)
 743                 RETURN(-ENOMEM);
 744
 745         for (i = 0; i < lo->ldo_stripenr; i++) {
 746                 if (unlikely(lovea_slot_is_dummy(&objs[i])))
 747                         continue;
 748
 749                 ostid_le_to_cpu(&objs[i].l_ost_oi, &info->lti_ostid);
 750                 idx = le32_to_cpu(objs[i].l_ost_idx);
 751                 rc = ostid_to_fid(&info->lti_fid, &info->lti_ostid, idx);
 752                 if (rc != 0)
 753                         GOTO(out, rc);
 754                 LASSERTF(fid_is_sane(&info->lti_fid), ""DFID" insane!\n",
 755                          PFID(&info->lti_fid));
 756                 lod_getref(&md->lod_ost_descs);
 757
 758                 rc = validate_lod_and_idx(md, idx);
 759                 if (unlikely(rc != 0)) {
 760                         lod_putref(md, &md->lod_ost_descs);
 761                         GOTO(out, rc);
 762                 }
 763
 764                 nd = &OST_TGT(md,idx)->ltd_ost->dd_lu_dev;
 765                 lod_putref(md, &md->lod_ost_descs);
 766
 767                 /* In the function below, .hs_keycmp resolves to
 768                  * u_obj_hop_keycmp() */
 769                 /* coverity[overrun-buffer-val] */
 770                 o = lu_object_find_at(env, nd, &info->lti_fid, NULL);
 771                 if (IS_ERR(o))
 772                         GOTO(out, rc = PTR_ERR(o));
 773
 774                 n = lu_object_locate(o->lo_header, nd->ld_type);
 775                 LASSERT(n);
 776
 777                 stripe[i] = container_of(n, struct dt_object, do_lu);
 778         }
 779
 780 out:
 781         if (rc != 0) {
 782                 for (i = 0; i < stripe_len; i++)
 783                         if (stripe[i] != NULL)
 784                                 lu_object_put(env, &stripe[i]->do_lu);
 785
 786                 OBD_FREE(stripe, sizeof(stripe[0]) * stripe_len);
 787                 lo->ldo_stripenr = 0;
 788         } else {
 789                 lo->ldo_stripe = stripe;
 790                 lo->ldo_stripes_allocated = stripe_len;
 791         }
 792
 793         RETURN(rc);
 794 }
 795
 796 /*
 797  * Parse striping information stored in lti_ea_store
 798  */
 799 int lod_parse_striping(const struct lu_env *env, struct lod_object *lo,
 800                        const struct lu_buf *buf)
 801 {
 802         struct lov_mds_md_v1    *lmm;
 803         struct lov_ost_data_v1  *objs;
 804         __u32                    magic;
 805         __u32                    pattern;
 806         int                      rc = 0;
 807         ENTRY;
 808
 809         LASSERT(buf);
 810         LASSERT(buf->lb_buf);
 811         LASSERT(buf->lb_len);
 812
 813         lmm = (struct lov_mds_md_v1 *) buf->lb_buf;
 814         magic = le32_to_cpu(lmm->lmm_magic);
 815         pattern = le32_to_cpu(lmm->lmm_pattern);
 816
 817         if (magic != LOV_MAGIC_V1 && magic != LOV_MAGIC_V3)
 818                 GOTO(out, rc = -EINVAL);
 819         if (lov_pattern(pattern) != LOV_PATTERN_RAID0)
 820                 GOTO(out, rc = -EINVAL);
 821
 822         lo->ldo_pattern = pattern;
 823         lo->ldo_stripe_size = le32_to_cpu(lmm->lmm_stripe_size);
 824         lo->ldo_layout_gen = le16_to_cpu(lmm->lmm_layout_gen);
 825         lo->ldo_stripenr = le16_to_cpu(lmm->lmm_stripe_count);
 826         /* released file stripenr fixup. */
 827         if (pattern & LOV_PATTERN_F_RELEASED)
 828                 lo->ldo_stripenr = 0;
 829
 830         LASSERT(buf->lb_len >= lov_mds_md_size(lo->ldo_stripenr, magic));
 831
 832         if (magic == LOV_MAGIC_V3) {
 833                 struct lov_mds_md_v3 *v3 = (struct lov_mds_md_v3 *) lmm;
 834                 objs = &v3->lmm_objects[0];
 835                 lod_object_set_pool(lo, v3->lmm_pool_name);
 836         } else {
 837                 objs = &lmm->lmm_objects[0];
 838         }
 839
 840         if (lo->ldo_stripenr > 0)
 841                 rc = lod_initialize_objects(env, lo, objs);
 842
 843 out:
 844         RETURN(rc);
 845 }
 846
 847 int lod_load_striping_locked(const struct lu_env *env, struct lod_object *lo)
 848 {
 849         struct lod_thread_info  *info = lod_env_info(env);
 850         struct lu_buf           *buf  = &info->lti_buf;
 851         struct dt_object        *next = dt_object_child(&lo->ldo_obj);
 852         int                      rc = 0;
 853         ENTRY;
 854
 855         /* already initialized? */
 856         if (lo->ldo_stripe != NULL)
 857                 GOTO(out, rc = 0);
 858
 859         if (!dt_object_exists(next))
 860                 GOTO(out, rc = 0);
 861
 862         /* Do not load stripe for slaves of striped dir */
 863         if (lo->ldo_dir_slave_stripe)
 864                 GOTO(out, rc = 0);
 865
 866         if (S_ISREG(lu_object_attr(lod2lu_obj(lo)))) {
 867                 rc = lod_get_lov_ea(env, lo);
 868                 if (rc <= 0)
 869                         GOTO(out, rc);
 870                 /*
 871                  * there is LOV EA (striping information) in this object
 872                  * let's parse it and create in-core objects for the stripes
 873                  */
 874                 buf->lb_buf = info->lti_ea_store;
 875                 buf->lb_len = info->lti_ea_store_size;
 876                 rc = lod_parse_striping(env, lo, buf);
 877         } else if (S_ISDIR(lu_object_attr(lod2lu_obj(lo)))) {
 878                 rc = lod_get_lmv_ea(env, lo);
 879                 if (rc < (typeof(rc))sizeof(struct lmv_mds_md_v1))
 880                         GOTO(out, rc = rc > 0 ? -EINVAL : rc);
 881
 882                 buf->lb_buf = info->lti_ea_store;
 883                 buf->lb_len = info->lti_ea_store_size;
 884                 if (rc == sizeof(struct lmv_mds_md_v1)) {
 885                         rc = lod_load_lmv_shards(env, lo, buf, true);
 886                         if (buf->lb_buf != info->lti_ea_store) {
 887                                 OBD_FREE_LARGE(info->lti_ea_store,
 888                                                info->lti_ea_store_size);
 889                                 info->lti_ea_store = buf->lb_buf;
 890                                 info->lti_ea_store_size = buf->lb_len;
 891                         }
 892
 893                         if (rc < 0)
 894                                 GOTO(out, rc);
 895                 }
 896
 897                 /*
 898                  * there is LOV EA (striping information) in this object
 899                  * let's parse it and create in-core objects for the stripes
 900                  */
 901                 rc = lod_parse_dir_striping(env, lo, buf);
 902         }
 903 out:
 904         RETURN(rc);
 905 }
 906
 907 /**
 908  * Load and parse striping information, create in-core representation for the
 909  * stripes
 910  **/
 911 int lod_load_striping(const struct lu_env *env, struct lod_object *lo)
 912 {
 913         struct dt_object        *next = dt_object_child(&lo->ldo_obj);
 914         int                     rc = 0;
 915
 916         /* currently this code is supposed to be called from declaration
 917          * phase only, thus the object is not expected to be locked by caller */
 918         dt_write_lock(env, next, 0);
 919         rc = lod_load_striping_locked(env, lo);
 920         dt_write_unlock(env, next);
 921         return rc;
 922 }
 923
 924 /* verify the striping information for directory */
 925 int lod_verify_striping(struct lod_device *d, const struct lu_buf *buf,
 926                         bool is_from_disk)
 927 {
 928         struct lov_user_md_v1   *lum;
 929         struct lov_user_md_v3   *lum3;
 930         struct pool_desc        *pool = NULL;
 931         __u32                    magic;
 932         __u32                    stripe_size;
 933         __u16                    stripe_count;
 934         __u16                    stripe_offset;
 935         size_t                   lum_size;
 936         int                      rc = 0;
 937         ENTRY;
 938
 939         lum = buf->lb_buf;
 940
 941         LASSERT(sizeof(*lum) < sizeof(*lum3));
 942
 943         if (buf->lb_len < sizeof(*lum)) {
 944                 CDEBUG(D_IOCTL, "buf len %zd too small for lov_user_md\n",
 945                        buf->lb_len);
 946                 GOTO(out, rc = -EINVAL);
 947         }
 948
 949         magic = le32_to_cpu(lum->lmm_magic);
 950         if (magic != LOV_USER_MAGIC_V1 &&
 951             magic != LOV_USER_MAGIC_V3 &&
 952             magic != LOV_MAGIC_V1_DEF &&
 953             magic != LOV_MAGIC_V3_DEF) {
 954                 CDEBUG(D_IOCTL, "bad userland LOV MAGIC: %#x\n", magic);
 955                 GOTO(out, rc = -EINVAL);
 956         }
 957
 958         /* the user uses "0" for default stripe pattern normally. */
 959         if (!is_from_disk && lum->lmm_pattern == 0)
 960                 lum->lmm_pattern = cpu_to_le32(LOV_PATTERN_RAID0);
 961
 962         if (le32_to_cpu(lum->lmm_pattern) != LOV_PATTERN_RAID0) {
 963                 CDEBUG(D_IOCTL, "bad userland stripe pattern: %#x\n",
 964                        le32_to_cpu(lum->lmm_pattern));
 965                 GOTO(out, rc = -EINVAL);
 966         }
 967
 968         /* 64kB is the largest common page size we see (ia64), and matches the
 969          * check in lfs */
 970         stripe_size = le32_to_cpu(lum->lmm_stripe_size);
 971         if (stripe_size & (LOV_MIN_STRIPE_SIZE - 1)) {
 972                 CDEBUG(D_IOCTL, "stripe size %u not a multiple of %u\n",
 973                        stripe_size, LOV_MIN_STRIPE_SIZE);
 974                 GOTO(out, rc = -EINVAL);
 975         }
 976
 977         /* an offset of -1 is treated as a "special" valid offset */
 978         stripe_offset = le16_to_cpu(lum->lmm_stripe_offset);
 979         if (stripe_offset != (typeof(stripe_offset))-1) {
 980                 /* if offset is not within valid range [0, osts_size) */
 981                 if (stripe_offset >= d->lod_osts_size) {
 982                         CDEBUG(D_IOCTL, "stripe offset %u >= bitmap size %u\n",
 983                                stripe_offset, d->lod_osts_size);
 984                         GOTO(out, rc = -EINVAL);
 985                 }
 986
 987                 /* if lmm_stripe_offset is *not* in bitmap */
 988                 if (!cfs_bitmap_check(d->lod_ost_bitmap, stripe_offset)) {
 989                         CDEBUG(D_IOCTL, "stripe offset %u not in bitmap\n",
 990                                stripe_offset);
 991                         GOTO(out, rc = -EINVAL);
 992                 }
 993         }
 994
 995         if (magic == LOV_USER_MAGIC_V1 || magic == LOV_MAGIC_V1_DEF)
 996                 lum_size = offsetof(struct lov_user_md_v1,
 997                                     lmm_objects[0]);
 998         else if (magic == LOV_USER_MAGIC_V3 || magic == LOV_MAGIC_V3_DEF)
 999                 lum_size = offsetof(struct lov_user_md_v3,
1000                                     lmm_objects[0]);
1001         else
1002                 GOTO(out, rc = -EINVAL);
1003
1004         stripe_count = le16_to_cpu(lum->lmm_stripe_count);
1005         if (buf->lb_len != lum_size) {
1006                 CDEBUG(D_IOCTL, "invalid buf len %zd for lov_user_md with "
1007                        "magic %#x and stripe_count %u\n",
1008                        buf->lb_len, magic, stripe_count);
1009                 GOTO(out, rc = -EINVAL);
1010         }
1011
1012         if (!(magic == LOV_USER_MAGIC_V3 || magic == LOV_MAGIC_V3_DEF))
1013                 goto out;
1014
1015         lum3 = buf->lb_buf;
1016         if (buf->lb_len < sizeof(*lum3)) {
1017                 CDEBUG(D_IOCTL, "buf len %zd too small for lov_user_md_v3\n",
1018                        buf->lb_len);
1019                 GOTO(out, rc = -EINVAL);
1020         }
1021
1022         /* In the function below, .hs_keycmp resolves to
1023          * pool_hashkey_keycmp() */
1024         /* coverity[overrun-buffer-val] */
1025         pool = lod_find_pool(d, lum3->lmm_pool_name);
1026         if (pool == NULL)
1027                 goto out;
1028
1029         if (stripe_offset != (typeof(stripe_offset))-1) {
1030                 rc = lod_check_index_in_pool(stripe_offset, pool);
1031                 if (rc < 0)
1032                         GOTO(out, rc = -EINVAL);
1033         }
1034
1035         if (is_from_disk && stripe_count > pool_tgt_count(pool)) {
1036                 CDEBUG(D_IOCTL,
1037                        "stripe count %u > # OSTs %u in the pool\n",
1038                        stripe_count, pool_tgt_count(pool));
1039                 GOTO(out, rc = -EINVAL);
1040         }
1041
1042 out:
1043         if (pool != NULL)
1044                 lod_pool_putref(pool);
1045
1046         RETURN(rc);
1047 }
1048
1049 void lod_fix_desc_stripe_size(__u64 *val)
1050 {
1051         if (*val < LOV_MIN_STRIPE_SIZE) {
1052                 if (*val != 0)
1053                         LCONSOLE_INFO("Increasing default stripe size to "
1054                                       "minimum value %u\n",
1055                                       LOV_DESC_STRIPE_SIZE_DEFAULT);
1056                 *val = LOV_DESC_STRIPE_SIZE_DEFAULT;
1057         } else if (*val & (LOV_MIN_STRIPE_SIZE - 1)) {
1058                 *val &= ~(LOV_MIN_STRIPE_SIZE - 1);
1059                 LCONSOLE_WARN("Changing default stripe size to "LPU64" (a "
1060                               "multiple of %u)\n",
1061                               *val, LOV_MIN_STRIPE_SIZE);
1062         }
1063 }
1064
1065 void lod_fix_desc_stripe_count(__u32 *val)
1066 {
1067         if (*val == 0)
1068                 *val = 1;
1069 }
1070
1071 void lod_fix_desc_pattern(__u32 *val)
1072 {
1073         /* from lov_setstripe */
1074         if ((*val != 0) && (*val != LOV_PATTERN_RAID0)) {
1075                 LCONSOLE_WARN("Unknown stripe pattern: %#x\n", *val);
1076                 *val = 0;
1077         }
1078 }
1079
1080 void lod_fix_desc_qos_maxage(__u32 *val)
1081 {
1082         /* fix qos_maxage */
1083         if (*val == 0)
1084                 *val = LOV_DESC_QOS_MAXAGE_DEFAULT;
1085 }
1086
1087 void lod_fix_desc(struct lov_desc *desc)
1088 {
1089         lod_fix_desc_stripe_size(&desc->ld_default_stripe_size);
1090         lod_fix_desc_stripe_count(&desc->ld_default_stripe_count);
1091         lod_fix_desc_pattern(&desc->ld_pattern);
1092         lod_fix_desc_qos_maxage(&desc->ld_qos_maxage);
1093 }
1094
1095 int lod_pools_init(struct lod_device *lod, struct lustre_cfg *lcfg)
1096 {
1097         struct obd_device          *obd;
1098         struct lov_desc            *desc;
1099         int                         rc;
1100         ENTRY;
1101
1102         obd = class_name2obd(lustre_cfg_string(lcfg, 0));
1103         LASSERT(obd != NULL);
1104         obd->obd_lu_dev = &lod->lod_dt_dev.dd_lu_dev;
1105
1106         if (LUSTRE_CFG_BUFLEN(lcfg, 1) < 1) {
1107                 CERROR("LOD setup requires a descriptor\n");
1108                 RETURN(-EINVAL);
1109         }
1110
1111         desc = (struct lov_desc *)lustre_cfg_buf(lcfg, 1);
1112
1113         if (sizeof(*desc) > LUSTRE_CFG_BUFLEN(lcfg, 1)) {
1114                 CERROR("descriptor size wrong: %d > %d\n",
1115                        (int)sizeof(*desc), LUSTRE_CFG_BUFLEN(lcfg, 1));
1116                 RETURN(-EINVAL);
1117         }
1118
1119         if (desc->ld_magic != LOV_DESC_MAGIC) {
1120                 if (desc->ld_magic == __swab32(LOV_DESC_MAGIC)) {
1121                         CDEBUG(D_OTHER, "%s: Swabbing lov desc %p\n",
1122                                obd->obd_name, desc);
1123                         lustre_swab_lov_desc(desc);
1124                 } else {
1125                         CERROR("%s: Bad lov desc magic: %#x\n",
1126                                obd->obd_name, desc->ld_magic);
1127                         RETURN(-EINVAL);
1128                 }
1129         }
1130
1131         lod_fix_desc(desc);
1132
1133         desc->ld_active_tgt_count = 0;
1134         lod->lod_desc = *desc;
1135
1136         lod->lod_sp_me = LUSTRE_SP_CLI;
1137
1138         /* Set up allocation policy (QoS and RR) */
1139         INIT_LIST_HEAD(&lod->lod_qos.lq_oss_list);
1140         init_rwsem(&lod->lod_qos.lq_rw_sem);
1141         lod->lod_qos.lq_dirty = 1;
1142         lod->lod_qos.lq_rr.lqr_dirty = 1;
1143         lod->lod_qos.lq_reset = 1;
1144         /* Default priority is toward free space balance */
1145         lod->lod_qos.lq_prio_free = 232;
1146         /* Default threshold for rr (roughly 17%) */
1147         lod->lod_qos.lq_threshold_rr = 43;
1148
1149         /* Set up OST pool environment */
1150         lod->lod_pools_hash_body = cfs_hash_create("POOLS", HASH_POOLS_CUR_BITS,
1151                                                    HASH_POOLS_MAX_BITS,
1152                                                    HASH_POOLS_BKT_BITS, 0,
1153                                                    CFS_HASH_MIN_THETA,
1154                                                    CFS_HASH_MAX_THETA,
1155                                                    &pool_hash_operations,
1156                                                    CFS_HASH_DEFAULT);
1157         if (lod->lod_pools_hash_body == NULL)
1158                 RETURN(-ENOMEM);
1159
1160         INIT_LIST_HEAD(&lod->lod_pool_list);
1161         lod->lod_pool_count = 0;
1162         rc = lod_ost_pool_init(&lod->lod_pool_info, 0);
1163         if (rc)
1164                 GOTO(out_hash, rc);
1165         rc = lod_ost_pool_init(&lod->lod_qos.lq_rr.lqr_pool, 0);
1166         if (rc)
1167                 GOTO(out_pool_info, rc);
1168
1169         RETURN(0);
1170
1171 out_pool_info:
1172         lod_ost_pool_free(&lod->lod_pool_info);
1173 out_hash:
1174         cfs_hash_putref(lod->lod_pools_hash_body);
1175
1176         return rc;
1177 }
1178
1179 int lod_pools_fini(struct lod_device *lod)
1180 {
1181         struct obd_device   *obd = lod2obd(lod);
1182         struct pool_desc    *pool, *tmp;
1183         ENTRY;
1184
1185         list_for_each_entry_safe(pool, tmp, &lod->lod_pool_list, pool_list) {
1186                 /* free pool structs */
1187                 CDEBUG(D_INFO, "delete pool %p\n", pool);
1188                 /* In the function below, .hs_keycmp resolves to
1189                  * pool_hashkey_keycmp() */
1190                 /* coverity[overrun-buffer-val] */
1191                 lod_pool_del(obd, pool->pool_name);
1192         }
1193
1194         cfs_hash_putref(lod->lod_pools_hash_body);
1195         lod_ost_pool_free(&(lod->lod_qos.lq_rr.lqr_pool));
1196         lod_ost_pool_free(&lod->lod_pool_info);
1197
1198         RETURN(0);
1199 }
1200