lustre/lov/lov_obd.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, but
  11  * WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13  * General Public License version 2 for more details (a copy is included
  14  * in the LICENSE file that accompanied this code).
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * version 2 along with this program; If not, see
  18  * http://www.gnu.org/licenses/gpl-2.0.html
  19  *
  20  * GPL HEADER END
  21  */
  22 /*
  23  * Copyright (c) 2002, 2010, Oracle and/or its affiliates. All rights reserved.
  24  * Use is subject to license terms.
  25  *
  26  * Copyright (c) 2011, 2017, Intel Corporation.
  27  */
  28 /*
  29  * This file is part of Lustre, http://www.lustre.org/
  30  *
  31  * lustre/lov/lov_obd.c
  32  *
  33  * Author: Phil Schwan <phil@clusterfs.com>
  34  * Author: Peter Braam <braam@clusterfs.com>
  35  * Author: Mike Shaver <shaver@clusterfs.com>
  36  * Author: Nathan Rutman <nathan@clusterfs.com>
  37  */
  38
  39 #define DEBUG_SUBSYSTEM S_LOV
  40 #include <libcfs/libcfs.h>
  41
  42 #include <cl_object.h>
  43 #include <lustre_dlm.h>
  44 #include <lustre_fid.h>
  45 #include <uapi/linux/lustre/lustre_ioctl.h>
  46 #include <lustre_lib.h>
  47 #include <lustre_mds.h>
  48 #include <lustre_net.h>
  49 #include <uapi/linux/lustre/lustre_param.h>
  50 #include <lustre_swab.h>
  51 #include <lprocfs_status.h>
  52 #include <obd_class.h>
  53 #include <obd_support.h>
  54
  55 #include "lov_internal.h"
  56
  57 /* Keep a refcount of lov->tgt usage to prevent racing with addition/deletion.
  58    Any function that expects lov_tgts to remain stationary must take a ref. */
  59 void lov_tgts_getref(struct obd_device *obd)
  60 {
  61         struct lov_obd *lov = &obd->u.lov;
  62
  63         /* nobody gets through here until lov_putref is done */
  64         mutex_lock(&lov->lov_lock);
  65         atomic_inc(&lov->lov_refcount);
  66         mutex_unlock(&lov->lov_lock);
  67 }
  68
  69 static void __lov_del_obd(struct obd_device *obd, struct lov_tgt_desc *tgt);
  70
  71 void lov_tgts_putref(struct obd_device *obd)
  72 {
  73         struct lov_obd *lov = &obd->u.lov;
  74
  75         mutex_lock(&lov->lov_lock);
  76         /* ok to dec to 0 more than once -- ltd_exp's will be null */
  77         if (atomic_dec_and_test(&lov->lov_refcount) && lov->lov_death_row) {
  78                 LIST_HEAD(kill);
  79                 struct lov_tgt_desc *tgt, *n;
  80                 int i;
  81
  82                 CDEBUG(D_CONFIG, "destroying %d lov targets\n",
  83                        lov->lov_death_row);
  84                 for (i = 0; i < lov->desc.ld_tgt_count; i++) {
  85                         tgt = lov->lov_tgts[i];
  86
  87                         if (!tgt || !tgt->ltd_reap)
  88                                 continue;
  89                         list_add(&tgt->ltd_kill, &kill);
  90                         /* XXX - right now there is a dependency on ld_tgt_count
  91                          * being the maximum tgt index for computing the
  92                          * mds_max_easize. So we can't shrink it. */
  93                         tgt_pool_remove(&lov->lov_packed, i);
  94                         lov->lov_tgts[i] = NULL;
  95                         lov->lov_death_row--;
  96                 }
  97                 mutex_unlock(&lov->lov_lock);
  98
  99                 list_for_each_entry_safe(tgt, n, &kill, ltd_kill) {
 100                         list_del(&tgt->ltd_kill);
 101                         /* Disconnect */
 102                         __lov_del_obd(obd, tgt);
 103                 }
 104         } else {
 105                 mutex_unlock(&lov->lov_lock);
 106         }
 107 }
 108
 109 static int lov_notify(struct obd_device *obd, struct obd_device *watched,
 110                       enum obd_notify_event ev);
 111
 112 int lov_connect_osc(struct obd_device *obd, u32 index, int activate,
 113                     struct obd_connect_data *data)
 114 {
 115         struct lov_obd *lov = &obd->u.lov;
 116         struct obd_uuid *tgt_uuid;
 117         struct obd_device *tgt_obd;
 118         static struct obd_uuid lov_osc_uuid = { "LOV_OSC_UUID" };
 119         struct obd_import *imp;
 120         int rc;
 121         ENTRY;
 122
 123         if (lov->lov_tgts[index] == NULL)
 124                 RETURN(-EINVAL);
 125
 126         tgt_uuid = &lov->lov_tgts[index]->ltd_uuid;
 127         tgt_obd = lov->lov_tgts[index]->ltd_obd;
 128
 129         if (!tgt_obd->obd_set_up) {
 130                 CERROR("Target %s not set up\n", obd_uuid2str(tgt_uuid));
 131                 RETURN(-EINVAL);
 132         }
 133
 134         /* override the sp_me from lov */
 135         tgt_obd->u.cli.cl_sp_me = lov->lov_sp_me;
 136
 137         if (data && (data->ocd_connect_flags & OBD_CONNECT_INDEX))
 138                 data->ocd_index = index;
 139
 140         /*
 141          * Divine LOV knows that OBDs under it are OSCs.
 142          */
 143         imp = tgt_obd->u.cli.cl_import;
 144
 145         if (activate) {
 146                 tgt_obd->obd_no_recov = 0;
 147                 /* FIXME this is probably supposed to be
 148                    ptlrpc_set_import_active.  Horrible naming. */
 149                 ptlrpc_activate_import(imp, false);
 150         }
 151
 152         rc = obd_register_observer(tgt_obd, obd);
 153         if (rc) {
 154                 CERROR("Target %s register_observer error %d\n",
 155                        obd_uuid2str(tgt_uuid), rc);
 156                 RETURN(rc);
 157         }
 158
 159         if (imp->imp_invalid) {
 160                 CDEBUG(D_CONFIG, "%s: not connecting - administratively disabled\n",
 161                        obd_uuid2str(tgt_uuid));
 162                 RETURN(0);
 163         }
 164
 165         rc = obd_connect(NULL, &lov->lov_tgts[index]->ltd_exp, tgt_obd,
 166                          &lov_osc_uuid, data, lov->lov_cache);
 167         if (rc || !lov->lov_tgts[index]->ltd_exp) {
 168                 CERROR("Target %s connect error %d\n",
 169                        obd_uuid2str(tgt_uuid), rc);
 170                 RETURN(-ENODEV);
 171         }
 172
 173         lov->lov_tgts[index]->ltd_reap = 0;
 174
 175         CDEBUG(D_CONFIG, "Connected tgt idx %d %s (%s) %sactive\n", index,
 176                obd_uuid2str(tgt_uuid), tgt_obd->obd_name, activate ? "":"in");
 177
 178         if (lov->lov_tgts_kobj) {
 179                 /* Even if we failed, that's ok */
 180                 rc = sysfs_create_link(lov->lov_tgts_kobj,
 181                                        &tgt_obd->obd_kset.kobj,
 182                                        tgt_obd->obd_name);
 183                 if (rc) {
 184                         CERROR("%s: can't register LOV target /sys/fs/lustre/%s/%s/target_obds/%s : rc = %d\n",
 185                                obd->obd_name, obd->obd_type->typ_name,
 186                                obd->obd_name,
 187                                lov->lov_tgts[index]->ltd_exp->exp_obd->obd_name,
 188                                rc);
 189                 }
 190         }
 191         RETURN(0);
 192 }
 193
 194 static int lov_connect(const struct lu_env *env,
 195                        struct obd_export **exp, struct obd_device *obd,
 196                        struct obd_uuid *cluuid, struct obd_connect_data *data,
 197                        void *localdata)
 198 {
 199         struct lov_obd *lov = &obd->u.lov;
 200         struct lov_tgt_desc *tgt;
 201         struct lustre_handle conn;
 202         int i, rc;
 203         ENTRY;
 204
 205         CDEBUG(D_CONFIG, "connect #%d\n", lov->lov_connects);
 206
 207         rc = class_connect(&conn, obd, cluuid);
 208         if (rc)
 209                 RETURN(rc);
 210
 211         *exp = class_conn2export(&conn);
 212
 213         /* Why should there ever be more than 1 connect? */
 214         lov->lov_connects++;
 215         LASSERT(lov->lov_connects == 1);
 216
 217         memset(&lov->lov_ocd, 0, sizeof(lov->lov_ocd));
 218         if (data)
 219                 lov->lov_ocd = *data;
 220
 221         lov_tgts_getref(obd);
 222
 223         if (localdata) {
 224                 lov->lov_cache = localdata;
 225                 cl_cache_incref(lov->lov_cache);
 226         }
 227
 228         for (i = 0; i < lov->desc.ld_tgt_count; i++) {
 229                 tgt = lov->lov_tgts[i];
 230                 if (!tgt || obd_uuid_empty(&tgt->ltd_uuid))
 231                         continue;
 232                 /* Flags will be lowest common denominator */
 233                 rc = lov_connect_osc(obd, i, tgt->ltd_activate, &lov->lov_ocd);
 234                 if (rc) {
 235                         CERROR("%s: lov connect tgt %d failed: %d\n",
 236                                obd->obd_name, i, rc);
 237                         continue;
 238                 }
 239                 /* connect to administrative disabled ost */
 240                 if (!lov->lov_tgts[i]->ltd_exp)
 241                         continue;
 242
 243                 rc = lov_notify(obd, lov->lov_tgts[i]->ltd_exp->exp_obd,
 244                                 OBD_NOTIFY_CONNECT);
 245                 if (rc) {
 246                         CERROR("%s error sending notify %d\n",
 247                                obd->obd_name, rc);
 248                 }
 249         }
 250
 251         lov_tgts_putref(obd);
 252
 253         RETURN(0);
 254 }
 255
 256 static int lov_disconnect_obd(struct obd_device *obd, struct lov_tgt_desc *tgt)
 257 {
 258         struct lov_obd *lov = &obd->u.lov;
 259         struct obd_device *osc_obd;
 260         int rc;
 261         ENTRY;
 262
 263         osc_obd = class_exp2obd(tgt->ltd_exp);
 264         CDEBUG(D_CONFIG, "%s: disconnecting target %s\n", obd->obd_name,
 265                osc_obd ? osc_obd->obd_name : "<no obd>");
 266
 267         if (tgt->ltd_active) {
 268                 tgt->ltd_active = 0;
 269                 lov->desc.ld_active_tgt_count--;
 270                 tgt->ltd_exp->exp_obd->obd_inactive = 1;
 271         }
 272
 273         if (osc_obd) {
 274                 if (lov->lov_tgts_kobj)
 275                         sysfs_remove_link(lov->lov_tgts_kobj,
 276                                           osc_obd->obd_name);
 277
 278                 /* Pass it on to our clients.
 279                  * XXX This should be an argument to disconnect,
 280                  * XXX not a back-door flag on the OBD.  Ah well.
 281                  */
 282                 osc_obd->obd_force = obd->obd_force;
 283                 osc_obd->obd_fail = obd->obd_fail;
 284                 osc_obd->obd_no_recov = obd->obd_no_recov;
 285         }
 286
 287         obd_register_observer(osc_obd, NULL);
 288
 289         rc = obd_disconnect(tgt->ltd_exp);
 290         if (rc) {
 291                 CERROR("Target %s disconnect error %d\n",
 292                        tgt->ltd_uuid.uuid, rc);
 293                 rc = 0;
 294         }
 295
 296         tgt->ltd_exp = NULL;
 297         RETURN(0);
 298 }
 299
 300 static int lov_disconnect(struct obd_export *exp)
 301 {
 302         struct obd_device *obd = class_exp2obd(exp);
 303         struct lov_obd *lov = &obd->u.lov;
 304         u32 index;
 305         int rc;
 306
 307         ENTRY;
 308         if (!lov->lov_tgts)
 309                 goto out;
 310
 311         /* Only disconnect the underlying layers on the final disconnect. */
 312         lov->lov_connects--;
 313         if (lov->lov_connects != 0) {
 314                 /* why should there be more than 1 connect? */
 315                 CWARN("%s: unexpected disconnect #%d\n",
 316                       obd->obd_name, lov->lov_connects);
 317                 goto out;
 318         }
 319
 320         /* hold another ref so lov_del_obd() doesn't spin in putref each time */
 321         lov_tgts_getref(obd);
 322
 323         for (index = 0; index < lov->desc.ld_tgt_count; index++) {
 324                 if (lov->lov_tgts[index] && lov->lov_tgts[index]->ltd_exp) {
 325                         /* Disconnection is the last we know about an OBD */
 326                         lov_del_target(obd, index, NULL,
 327                                        lov->lov_tgts[index]->ltd_gen);
 328                 }
 329         }
 330         lov_tgts_putref(obd);
 331
 332 out:
 333         rc = class_disconnect(exp); /* bz 9811 */
 334         RETURN(rc);
 335 }
 336
 337 /* Error codes:
 338  *
 339  *  -EINVAL  : UUID can't be found in the LOV's target list
 340  *  -ENOTCONN: The UUID is found, but the target connection is bad (!)
 341  *  -EBADF   : The UUID is found, but the OBD is the wrong type (!)
 342  *  any >= 0 : is log target index
 343  */
 344 static int lov_set_osc_active(struct obd_device *obd, struct obd_uuid *uuid,
 345                               enum obd_notify_event ev)
 346 {
 347         struct lov_obd *lov = &obd->u.lov;
 348         struct lov_tgt_desc *tgt;
 349         int index;
 350         bool activate, active;
 351         ENTRY;
 352
 353         CDEBUG(D_INFO, "Searching in lov %p for uuid %s event(%d)\n",
 354                lov, uuid->uuid, ev);
 355
 356         lov_tgts_getref(obd);
 357         for (index = 0; index < lov->desc.ld_tgt_count; index++) {
 358                 tgt = lov->lov_tgts[index];
 359                 if (tgt && obd_uuid_equals(uuid, &tgt->ltd_uuid))
 360                         break;
 361         }
 362
 363         if (index == lov->desc.ld_tgt_count)
 364                 GOTO(out, index = -EINVAL);
 365
 366         if (ev == OBD_NOTIFY_DEACTIVATE || ev == OBD_NOTIFY_ACTIVATE) {
 367                 activate = (ev == OBD_NOTIFY_ACTIVATE);
 368
 369                 /*
 370                  * LU-642, initially inactive OSC could miss the obd_connect,
 371                  * we make up for it here.
 372                  */
 373                 if (activate && !tgt->ltd_exp) {
 374                         int rc;
 375                         struct obd_uuid lov_osc_uuid = {"LOV_OSC_UUID"};
 376
 377                         rc = obd_connect(NULL, &tgt->ltd_exp, tgt->ltd_obd,
 378                                          &lov_osc_uuid, &lov->lov_ocd,
 379                                          lov->lov_cache);
 380                         if (rc || !tgt->ltd_exp)
 381                                 GOTO(out, index = rc);
 382                 }
 383
 384                 if (lov->lov_tgts[index]->ltd_activate == activate) {
 385                         CDEBUG(D_INFO, "OSC %s already %sactivate!\n",
 386                                uuid->uuid, activate ? "" : "de");
 387                 } else {
 388                         lov->lov_tgts[index]->ltd_activate = activate;
 389                         CDEBUG(D_CONFIG, "%sactivate OSC %s\n",
 390                                activate ? "" : "de", obd_uuid2str(uuid));
 391                 }
 392         } else if (ev == OBD_NOTIFY_INACTIVE || ev == OBD_NOTIFY_ACTIVE) {
 393                 active = (ev == OBD_NOTIFY_ACTIVE);
 394
 395                 if (lov->lov_tgts[index]->ltd_active == active) {
 396                         CDEBUG(D_INFO, "OSC %s already %sactive!\n",
 397                                uuid->uuid, active ? "" : "in");
 398                         GOTO(out, index);
 399                 }
 400                 CDEBUG(D_CONFIG, "Marking OSC %s %sactive\n",
 401                        obd_uuid2str(uuid), active ? "" : "in");
 402
 403                 lov->lov_tgts[index]->ltd_active = active;
 404                 if (active) {
 405                         lov->desc.ld_active_tgt_count++;
 406                         lov->lov_tgts[index]->ltd_exp->exp_obd->obd_inactive = 0;
 407                 } else {
 408                         lov->desc.ld_active_tgt_count--;
 409                         lov->lov_tgts[index]->ltd_exp->exp_obd->obd_inactive = 1;
 410                 }
 411         } else {
 412                 CERROR("%s: unknown event %d for uuid %s\n", obd->obd_name,
 413                        ev, uuid->uuid);
 414         }
 415
 416         if (tgt->ltd_exp)
 417                 CDEBUG(D_INFO, "%s: lov idx %d conn %llx\n", obd_uuid2str(uuid),
 418                        index, tgt->ltd_exp->exp_handle.h_cookie);
 419
 420  out:
 421         lov_tgts_putref(obd);
 422         RETURN(index);
 423 }
 424
 425 static int lov_notify(struct obd_device *obd, struct obd_device *watched,
 426                       enum obd_notify_event ev)
 427 {
 428         int rc = 0;
 429         struct lov_obd *lov = &obd->u.lov;
 430         ENTRY;
 431
 432         down_read(&lov->lov_notify_lock);
 433         if (!lov->lov_connects)
 434                 GOTO(out_notify_lock, rc = 0);
 435
 436         if (ev == OBD_NOTIFY_ACTIVE || ev == OBD_NOTIFY_INACTIVE ||
 437             ev == OBD_NOTIFY_ACTIVATE || ev == OBD_NOTIFY_DEACTIVATE) {
 438                 struct obd_uuid *uuid;
 439
 440                 LASSERT(watched);
 441
 442                 if (strcmp(watched->obd_type->typ_name, LUSTRE_OSC_NAME)) {
 443                         CERROR("unexpected notification of %s %s\n",
 444                                watched->obd_type->typ_name, watched->obd_name);
 445                         GOTO(out_notify_lock, rc = -EINVAL);
 446                 }
 447
 448                 uuid = &watched->u.cli.cl_target_uuid;
 449
 450                 /* Set OSC as active before notifying the observer, so the
 451                  * observer can use the OSC normally.
 452                  */
 453                 rc = lov_set_osc_active(obd, uuid, ev);
 454                 if (rc < 0) {
 455                         CERROR("%s: event %d failed: rc = %d\n", obd->obd_name,
 456                                ev, rc);
 457                         GOTO(out_notify_lock, rc);
 458                 }
 459         }
 460
 461         /* Pass the notification up the chain. */
 462         rc = obd_notify_observer(obd, watched, ev);
 463
 464 out_notify_lock:
 465         up_read(&lov->lov_notify_lock);
 466
 467         RETURN(rc);
 468 }
 469
 470 static int lov_add_target(struct obd_device *obd, struct obd_uuid *uuidp,
 471                           u32 index, int gen, int active)
 472 {
 473         struct lov_obd *lov = &obd->u.lov;
 474         struct lov_tgt_desc *tgt;
 475         struct obd_device *tgt_obd;
 476         int rc;
 477
 478         ENTRY;
 479         CDEBUG(D_CONFIG, "uuid:%s idx:%u gen:%d active:%d\n",
 480                uuidp->uuid, index, gen, active);
 481
 482         if (gen <= 0) {
 483                 CERROR("%s: request to add '%s' with invalid generation: %d\n",
 484                        obd->obd_name, uuidp->uuid, gen);
 485                 RETURN(-EINVAL);
 486         }
 487
 488         tgt_obd = class_find_client_obd(uuidp, LUSTRE_OSC_NAME, &obd->obd_uuid);
 489         if (tgt_obd == NULL)
 490                 RETURN(-EINVAL);
 491
 492         mutex_lock(&lov->lov_lock);
 493
 494         if ((index < lov->lov_tgt_size) && (lov->lov_tgts[index] != NULL)) {
 495                 tgt = lov->lov_tgts[index];
 496                 rc = -EEXIST;
 497                 CERROR("%s: UUID %s already assigned at index %d: rc = %d\n",
 498                        obd->obd_name, obd_uuid2str(&tgt->ltd_uuid), index, rc);
 499                 mutex_unlock(&lov->lov_lock);
 500                 RETURN(rc);
 501         }
 502
 503         if (index >= lov->lov_tgt_size) {
 504                 /* We need to reallocate the lov target array. */
 505                 struct lov_tgt_desc **newtgts, **old = NULL;
 506                 __u32 newsize, oldsize = 0;
 507
 508                 newsize = max(lov->lov_tgt_size, 2U);
 509                 while (newsize < index + 1)
 510                         newsize = newsize << 1;
 511                 OBD_ALLOC_PTR_ARRAY(newtgts, newsize);
 512                 if (newtgts == NULL) {
 513                         mutex_unlock(&lov->lov_lock);
 514                         RETURN(-ENOMEM);
 515                 }
 516
 517                 if (lov->lov_tgt_size) {
 518                         memcpy(newtgts, lov->lov_tgts, sizeof(*newtgts) *
 519                                lov->lov_tgt_size);
 520                         old = lov->lov_tgts;
 521                         oldsize = lov->lov_tgt_size;
 522                 }
 523
 524                 lov->lov_tgts = newtgts;
 525                 lov->lov_tgt_size = newsize;
 526                 smp_rmb();
 527                 if (old)
 528                         OBD_FREE_PTR_ARRAY(old, oldsize);
 529
 530                 CDEBUG(D_CONFIG, "tgts: %p size: %d\n",
 531                        lov->lov_tgts, lov->lov_tgt_size);
 532         }
 533
 534         OBD_ALLOC_PTR(tgt);
 535         if (!tgt) {
 536                 mutex_unlock(&lov->lov_lock);
 537                 RETURN(-ENOMEM);
 538         }
 539
 540         rc = tgt_pool_add(&lov->lov_packed, index, lov->lov_tgt_size);
 541         if (rc) {
 542                 mutex_unlock(&lov->lov_lock);
 543                 OBD_FREE_PTR(tgt);
 544                 RETURN(rc);
 545         }
 546
 547         tgt->ltd_uuid = *uuidp;
 548         tgt->ltd_obd = tgt_obd;
 549         /* XXX - add a sanity check on the generation number. */
 550         tgt->ltd_gen = gen;
 551         tgt->ltd_index = index;
 552         tgt->ltd_activate = active;
 553         lov->lov_tgts[index] = tgt;
 554         if (index >= lov->desc.ld_tgt_count)
 555                 lov->desc.ld_tgt_count = index + 1;
 556
 557         mutex_unlock(&lov->lov_lock);
 558
 559         CDEBUG(D_CONFIG, "idx=%d ltd_gen=%d ld_tgt_count=%d\n",
 560                 index, tgt->ltd_gen, lov->desc.ld_tgt_count);
 561
 562         if (lov->lov_connects == 0) {
 563                 /* lov_connect hasn't been called yet. We'll do the
 564                    lov_connect_osc on this target when that fn first runs,
 565                    because we don't know the connect flags yet. */
 566                 RETURN(0);
 567         }
 568
 569         lov_tgts_getref(obd);
 570
 571         rc = lov_connect_osc(obd, index, active, &lov->lov_ocd);
 572         if (rc)
 573                 GOTO(out, rc);
 574
 575         /* connect to administrative disabled ost */
 576         if (!tgt->ltd_exp)
 577                 GOTO(out, rc = 0);
 578
 579         rc = lov_notify(obd, tgt->ltd_exp->exp_obd,
 580                         active ? OBD_NOTIFY_CONNECT : OBD_NOTIFY_INACTIVE);
 581
 582 out:
 583         if (rc) {
 584                 CERROR("%s: add failed, deleting %s: rc = %d\n",
 585                        obd->obd_name, obd_uuid2str(&tgt->ltd_uuid), rc);
 586                 lov_del_target(obd, index, NULL, 0);
 587         }
 588         lov_tgts_putref(obd);
 589         RETURN(rc);
 590 }
 591
 592 /* Schedule a target for deletion */
 593 int lov_del_target(struct obd_device *obd, u32 index,
 594                    struct obd_uuid *uuidp, int gen)
 595 {
 596         struct lov_obd *lov = &obd->u.lov;
 597         int count = lov->desc.ld_tgt_count;
 598         int rc = 0;
 599         ENTRY;
 600
 601         if (index >= count) {
 602                 CERROR("LOV target index %d >= number of LOV OBDs %d.\n",
 603                        index, count);
 604                 RETURN(-EINVAL);
 605         }
 606
 607         /* to make sure there's no ongoing lov_notify() now */
 608         down_write(&lov->lov_notify_lock);
 609         lov_tgts_getref(obd);
 610
 611         if (!lov->lov_tgts[index]) {
 612                 CERROR("LOV target at index %d is not setup.\n", index);
 613                 GOTO(out, rc = -EINVAL);
 614         }
 615
 616         if (uuidp && !obd_uuid_equals(uuidp, &lov->lov_tgts[index]->ltd_uuid)) {
 617                 CERROR("LOV target UUID %s at index %d doesn't match %s.\n",
 618                        lov_uuid2str(lov, index), index,
 619                        obd_uuid2str(uuidp));
 620                 GOTO(out, rc = -EINVAL);
 621         }
 622
 623         CDEBUG(D_CONFIG, "uuid: %s idx: %d gen: %d exp: %p active: %d\n",
 624                lov_uuid2str(lov, index), index,
 625                lov->lov_tgts[index]->ltd_gen, lov->lov_tgts[index]->ltd_exp,
 626                lov->lov_tgts[index]->ltd_active);
 627
 628         lov->lov_tgts[index]->ltd_reap = 1;
 629         lov->lov_death_row++;
 630         /* we really delete it from lov_tgts_putref() */
 631 out:
 632         lov_tgts_putref(obd);
 633         up_write(&lov->lov_notify_lock);
 634
 635         RETURN(rc);
 636 }
 637
 638 static void __lov_del_obd(struct obd_device *obd, struct lov_tgt_desc *tgt)
 639 {
 640         struct obd_device *osc_obd;
 641
 642         LASSERT(tgt);
 643         LASSERT(tgt->ltd_reap);
 644
 645         osc_obd = class_exp2obd(tgt->ltd_exp);
 646
 647         CDEBUG(D_CONFIG, "Removing tgt %s : %s\n",
 648                tgt->ltd_uuid.uuid,
 649                osc_obd ? osc_obd->obd_name : "<no obd>");
 650
 651         if (tgt->ltd_exp)
 652                 lov_disconnect_obd(obd, tgt);
 653
 654         OBD_FREE_PTR(tgt);
 655
 656         /* Manual cleanup - no cleanup logs to clean up the osc's.  We must
 657            do it ourselves. And we can't do it from lov_cleanup,
 658            because we just lost our only reference to it. */
 659         if (osc_obd)
 660                 class_manual_cleanup(osc_obd);
 661 }
 662
 663 void lov_fix_desc_stripe_size(__u64 *val)
 664 {
 665         if (*val < LOV_MIN_STRIPE_SIZE) {
 666                 if (*val != 0)
 667                         LCONSOLE_INFO("Increasing default stripe size to "
 668                                       "minimum %u\n",
 669                                       LOV_DESC_STRIPE_SIZE_DEFAULT);
 670                 *val = LOV_DESC_STRIPE_SIZE_DEFAULT;
 671         } else if (*val & (LOV_MIN_STRIPE_SIZE - 1)) {
 672                 *val &= ~(LOV_MIN_STRIPE_SIZE - 1);
 673                 LCONSOLE_WARN("Changing default stripe size to %llu (a "
 674                               "multiple of %u)\n",
 675                               *val, LOV_MIN_STRIPE_SIZE);
 676         }
 677 }
 678
 679 void lov_fix_desc_stripe_count(__u32 *val)
 680 {
 681         if (*val == 0)
 682                 *val = 1;
 683 }
 684
 685 void lov_fix_desc_pattern(__u32 *val)
 686 {
 687         /* from lov_setstripe */
 688         if ((*val != 0) && !lov_pattern_supported_normal_comp(*val)) {
 689                 LCONSOLE_WARN("lov: Unknown stripe pattern: %#x\n", *val);
 690                 *val = 0;
 691         }
 692 }
 693
 694 void lov_fix_desc_qos_maxage(__u32 *val)
 695 {
 696         if (*val == 0)
 697                 *val = LOV_DESC_QOS_MAXAGE_DEFAULT;
 698 }
 699
 700 void lov_fix_desc(struct lov_desc *desc)
 701 {
 702         lov_fix_desc_stripe_size(&desc->ld_default_stripe_size);
 703         lov_fix_desc_stripe_count(&desc->ld_default_stripe_count);
 704         lov_fix_desc_pattern(&desc->ld_pattern);
 705         lov_fix_desc_qos_maxage(&desc->ld_qos_maxage);
 706 }
 707
 708 int lov_setup(struct obd_device *obd, struct lustre_cfg *lcfg)
 709 {
 710         struct lov_desc *desc;
 711         struct lov_obd *lov = &obd->u.lov;
 712         int rc;
 713         ENTRY;
 714
 715         if (LUSTRE_CFG_BUFLEN(lcfg, 1) < 1) {
 716                 CERROR("LOV setup requires a descriptor\n");
 717                 RETURN(-EINVAL);
 718         }
 719
 720         desc = (struct lov_desc *)lustre_cfg_buf(lcfg, 1);
 721
 722         if (sizeof(*desc) > LUSTRE_CFG_BUFLEN(lcfg, 1)) {
 723                 CERROR("descriptor size wrong: %d > %d\n",
 724                        (int)sizeof(*desc), LUSTRE_CFG_BUFLEN(lcfg, 1));
 725                 RETURN(-EINVAL);
 726         }
 727
 728         if (desc->ld_magic != LOV_DESC_MAGIC) {
 729                 if (desc->ld_magic == __swab32(LOV_DESC_MAGIC)) {
 730                             CDEBUG(D_OTHER, "%s: Swabbing lov desc %p\n",
 731                                    obd->obd_name, desc);
 732                             lustre_swab_lov_desc(desc);
 733                 } else {
 734                         CERROR("%s: Bad lov desc magic: %#x\n",
 735                                obd->obd_name, desc->ld_magic);
 736                         RETURN(-EINVAL);
 737                 }
 738         }
 739
 740         lov_fix_desc(desc);
 741
 742         desc->ld_active_tgt_count = 0;
 743         lov->desc = *desc;
 744         lov->lov_tgt_size = 0;
 745
 746         mutex_init(&lov->lov_lock);
 747         atomic_set(&lov->lov_refcount, 0);
 748         lov->lov_sp_me = LUSTRE_SP_CLI;
 749
 750         init_rwsem(&lov->lov_notify_lock);
 751
 752         INIT_LIST_HEAD(&lov->lov_pool_list);
 753         lov->lov_pool_count = 0;
 754         rc = lov_pool_hash_init(&lov->lov_pools_hash_body);
 755         if (rc)
 756                 GOTO(out, rc);
 757
 758         rc = tgt_pool_init(&lov->lov_packed, 0);
 759         if (rc)
 760                 GOTO(out, rc);
 761
 762         rc = lov_tunables_init(obd);
 763         if (rc)
 764                 GOTO(out, rc);
 765
 766         lov->lov_tgts_kobj = kobject_create_and_add("target_obds",
 767                                                     &obd->obd_kset.kobj);
 768
 769 out:
 770         return rc;
 771 }
 772
 773 static int lov_cleanup(struct obd_device *obd)
 774 {
 775         struct lov_obd *lov = &obd->u.lov;
 776         struct list_head *pos, *tmp;
 777         struct pool_desc *pool;
 778         ENTRY;
 779
 780         if (lov->lov_tgts_kobj) {
 781                 kobject_put(lov->lov_tgts_kobj);
 782                 lov->lov_tgts_kobj = NULL;
 783         }
 784
 785         list_for_each_safe(pos, tmp, &lov->lov_pool_list) {
 786                 pool = list_entry(pos, struct pool_desc, pool_list);
 787                 /* free pool structs */
 788                 CDEBUG(D_INFO, "delete pool %p\n", pool);
 789                 /* In the function below, .hs_keycmp resolves to
 790                  * pool_hashkey_keycmp() */
 791                 /* coverity[overrun-buffer-val] */
 792                 lov_pool_del(obd, pool->pool_name);
 793         }
 794         lov_pool_hash_destroy(&lov->lov_pools_hash_body);
 795         tgt_pool_free(&lov->lov_packed);
 796
 797         lprocfs_obd_cleanup(obd);
 798         if (lov->lov_tgts) {
 799                 int i;
 800                 lov_tgts_getref(obd);
 801                 for (i = 0; i < lov->desc.ld_tgt_count; i++) {
 802                         if (!lov->lov_tgts[i])
 803                                 continue;
 804
 805                         /* Inactive targets may never have connected */
 806                         if (lov->lov_tgts[i]->ltd_active)
 807                                 /* We should never get here - these
 808                                  * should have been removed in the
 809                                  * disconnect. */
 810                                 CERROR("%s: lov tgt %d not cleaned! "
 811                                        "deathrow=%d, lovrc=%d\n",
 812                                        obd->obd_name, i, lov->lov_death_row,
 813                                        atomic_read(&lov->lov_refcount));
 814                         lov_del_target(obd, i, NULL, 0);
 815                 }
 816                 lov_tgts_putref(obd);
 817                 OBD_FREE_PTR_ARRAY(lov->lov_tgts, lov->lov_tgt_size);
 818                 lov->lov_tgt_size = 0;
 819         }
 820
 821         if (lov->lov_cache != NULL) {
 822                 cl_cache_decref(lov->lov_cache);
 823                 lov->lov_cache = NULL;
 824         }
 825
 826         RETURN(0);
 827 }
 828
 829 int lov_process_config_base(struct obd_device *obd, struct lustre_cfg *lcfg,
 830                             u32 *indexp, int *genp)
 831 {
 832         struct obd_uuid obd_uuid;
 833         int cmd;
 834         int rc = 0;
 835
 836         ENTRY;
 837         switch (cmd = lcfg->lcfg_command) {
 838         case LCFG_ADD_MDC:
 839         case LCFG_DEL_MDC:
 840                 break;
 841         case LCFG_LOV_ADD_OBD:
 842         case LCFG_LOV_ADD_INA:
 843         case LCFG_LOV_DEL_OBD: {
 844                 u32 index;
 845                 int gen;
 846
 847                 /* lov_modify_tgts add  0:lov_mdsA  1:ost1_UUID  2:0  3:1 */
 848                 if (LUSTRE_CFG_BUFLEN(lcfg, 1) > sizeof(obd_uuid.uuid))
 849                         GOTO(out, rc = -EINVAL);
 850
 851                 obd_str2uuid(&obd_uuid,  lustre_cfg_buf(lcfg, 1));
 852
 853                 rc = kstrtou32(lustre_cfg_buf(lcfg, 2), 10, indexp);
 854                 if (rc)
 855                         GOTO(out, rc);
 856                 rc = kstrtoint(lustre_cfg_buf(lcfg, 3), 10, genp);
 857                 if (rc)
 858                         GOTO(out, rc);
 859                 index = *indexp;
 860                 gen = *genp;
 861                 if (cmd == LCFG_LOV_ADD_OBD)
 862                         rc = lov_add_target(obd, &obd_uuid, index, gen, 1);
 863                 else if (cmd == LCFG_LOV_ADD_INA)
 864                         rc = lov_add_target(obd, &obd_uuid, index, gen, 0);
 865                 else
 866                         rc = lov_del_target(obd, index, &obd_uuid, gen);
 867
 868                 GOTO(out, rc);
 869         }
 870         case LCFG_PARAM: {
 871                 struct lov_desc *desc = &(obd->u.lov.desc);
 872                 ssize_t count;
 873
 874                 if (!desc)
 875                         GOTO(out, rc = -EINVAL);
 876
 877                 count = class_modify_config(lcfg, PARAM_LOV,
 878                                             &obd->obd_kset.kobj);
 879                 GOTO(out, rc = count < 0 ? count : 0);
 880         }
 881         case LCFG_POOL_NEW:
 882         case LCFG_POOL_ADD:
 883         case LCFG_POOL_DEL:
 884         case LCFG_POOL_REM:
 885                 GOTO(out, rc);
 886
 887         default: {
 888                 CERROR("Unknown command: %d\n", lcfg->lcfg_command);
 889                 GOTO(out, rc = -EINVAL);
 890
 891         }
 892         }
 893 out:
 894         RETURN(rc);
 895 }
 896
 897 static int lov_statfs(const struct lu_env *env, struct obd_export *exp,
 898                       struct obd_statfs *osfs, time64_t max_age, __u32 flags)
 899 {
 900         struct obd_device *obd = class_exp2obd(exp);
 901         struct lov_obd *lov = &obd->u.lov;
 902         struct obd_info oinfo = {
 903                 .oi_osfs = osfs,
 904                 .oi_flags = flags,
 905         };
 906         struct ptlrpc_request_set *rqset;
 907         struct lov_request_set *set = NULL;
 908         struct lov_request *req;
 909         int rc = 0;
 910         int rc2;
 911
 912         ENTRY;
 913
 914         rqset = ptlrpc_prep_set();
 915         if (rqset == NULL)
 916                 RETURN(-ENOMEM);
 917
 918         rc = lov_prep_statfs_set(obd, &oinfo, &set);
 919         if (rc < 0)
 920                 GOTO(out_rqset, rc);
 921
 922         list_for_each_entry(req, &set->set_list, rq_link) {
 923                 rc = obd_statfs_async(lov->lov_tgts[req->rq_idx]->ltd_exp,
 924                                       &req->rq_oi, max_age, rqset);
 925                 if (rc < 0)
 926                         GOTO(out_set, rc);
 927         }
 928
 929         rc = ptlrpc_set_wait(env, rqset);
 930
 931 out_set:
 932         if (rc < 0)
 933                 atomic_set(&set->set_completes, 0);
 934
 935         rc2 = lov_fini_statfs_set(set);
 936         if (rc == 0)
 937                 rc = rc2;
 938
 939 out_rqset:
 940         ptlrpc_set_destroy(rqset);
 941
 942         RETURN(rc);
 943 }
 944
 945 static int lov_iocontrol(unsigned int cmd, struct obd_export *exp, int len,
 946                          void *karg, void __user *uarg)
 947 {
 948         struct obd_device *obd = class_exp2obd(exp);
 949         struct lov_obd *lov = &obd->u.lov;
 950         int i = 0, rc = 0, count = lov->desc.ld_tgt_count;
 951
 952         ENTRY;
 953         switch (cmd) {
 954         case IOC_OBD_STATFS: {
 955                 struct obd_ioctl_data *data = karg;
 956                 struct obd_device *osc_obd;
 957                 struct obd_statfs stat_buf = {0};
 958                 struct obd_import *imp;
 959                 __u32 index;
 960                 __u32 flags;
 961
 962                 memcpy(&index, data->ioc_inlbuf2, sizeof(index));
 963                 if (index >= count)
 964                         RETURN(-ENODEV);
 965
 966                 if (!lov->lov_tgts[index])
 967                         /* Try again with the next index */
 968                         RETURN(-EAGAIN);
 969
 970                 osc_obd = class_exp2obd(lov->lov_tgts[index]->ltd_exp);
 971                 if (!osc_obd)
 972                         RETURN(-EINVAL);
 973
 974                 imp = osc_obd->u.cli.cl_import;
 975                 if (!lov->lov_tgts[index]->ltd_active &&
 976                     imp->imp_state != LUSTRE_IMP_IDLE)
 977                         RETURN(-ENODATA);
 978
 979                 /* copy UUID */
 980                 if (copy_to_user(data->ioc_pbuf2, obd2cli_tgt(osc_obd),
 981                                  min_t(unsigned long, data->ioc_plen2,
 982                                        sizeof(struct obd_uuid))))
 983                         RETURN(-EFAULT);
 984
 985                 memcpy(&flags, data->ioc_inlbuf1, sizeof(flags));
 986                 flags = flags & LL_STATFS_NODELAY ? OBD_STATFS_NODELAY : 0;
 987
 988                 /* got statfs data */
 989                 rc = obd_statfs(NULL, lov->lov_tgts[index]->ltd_exp, &stat_buf,
 990                                 ktime_get_seconds() - OBD_STATFS_CACHE_SECONDS,
 991                                 flags);
 992                 if (rc)
 993                         RETURN(rc);
 994                 if (copy_to_user(data->ioc_pbuf1, &stat_buf,
 995                                  min_t(unsigned long, data->ioc_plen1,
 996                                        sizeof(struct obd_statfs))))
 997                         RETURN(-EFAULT);
 998                 break;
 999         }
1000         case OBD_IOC_QUOTACTL: {
1001                 struct if_quotactl *qctl = karg;
1002                 struct lov_tgt_desc *tgt = NULL;
1003                 struct obd_quotactl *oqctl;
1004
1005                 if (qctl->qc_valid == QC_OSTIDX) {
1006                         if (count <= qctl->qc_idx)
1007                                 RETURN(-EINVAL);
1008
1009                         tgt = lov->lov_tgts[qctl->qc_idx];
1010                         if (!tgt || !tgt->ltd_exp)
1011                                 RETURN(-EINVAL);
1012                 } else if (qctl->qc_valid == QC_UUID) {
1013                         for (i = 0; i < count; i++) {
1014                                 tgt = lov->lov_tgts[i];
1015                                 if (!tgt ||
1016                                     !obd_uuid_equals(&tgt->ltd_uuid,
1017                                                      &qctl->obd_uuid))
1018                                         continue;
1019
1020                                 if (tgt->ltd_exp == NULL)
1021                                         RETURN(-EINVAL);
1022
1023                                 break;
1024                         }
1025                 } else {
1026                         RETURN(-EINVAL);
1027                 }
1028
1029                 if (i >= count)
1030                         RETURN(-EAGAIN);
1031
1032                 LASSERT(tgt && tgt->ltd_exp);
1033                 OBD_ALLOC_PTR(oqctl);
1034                 if (!oqctl)
1035                         RETURN(-ENOMEM);
1036
1037                 QCTL_COPY(oqctl, qctl);
1038                 rc = obd_quotactl(tgt->ltd_exp, oqctl);
1039                 if (rc == 0) {
1040                         QCTL_COPY(qctl, oqctl);
1041                         qctl->qc_valid = QC_OSTIDX;
1042                         qctl->obd_uuid = tgt->ltd_uuid;
1043                 }
1044                 OBD_FREE_PTR(oqctl);
1045                 break;
1046         }
1047         default: {
1048                 int set = 0;
1049
1050                 if (count == 0)
1051                         RETURN(-ENOTTY);
1052
1053                 for (i = 0; i < count; i++) {
1054                         int err;
1055                         struct obd_device *osc_obd;
1056
1057                         /* OST was disconnected */
1058                         if (!lov->lov_tgts[i] || !lov->lov_tgts[i]->ltd_exp)
1059                                 continue;
1060
1061                         /* ll_umount_begin() sets force on lov, pass to osc */
1062                         osc_obd = class_exp2obd(lov->lov_tgts[i]->ltd_exp);
1063                         if (osc_obd)
1064                                 osc_obd->obd_force = obd->obd_force;
1065                         err = obd_iocontrol(cmd, lov->lov_tgts[i]->ltd_exp,
1066                                             len, karg, uarg);
1067                         if (err) {
1068                                 if (lov->lov_tgts[i]->ltd_active) {
1069                                         CDEBUG_LIMIT(err == -ENOTTY ?
1070                                                      D_IOCTL : D_WARNING,
1071                                                      "iocontrol OSC %s on OST idx %d cmd %x: err = %d\n",
1072                                                      lov_uuid2str(lov, i),
1073                                                      i, cmd, err);
1074                                         if (!rc)
1075                                                 rc = err;
1076                                 }
1077                         } else {
1078                                 set = 1;
1079                         }
1080                 }
1081                 if (!set && !rc)
1082                         rc = -EIO;
1083         }
1084         }
1085
1086         RETURN(rc);
1087 }
1088
1089 static int lov_get_info(const struct lu_env *env, struct obd_export *exp,
1090                         __u32 keylen, void *key, __u32 *vallen, void *val)
1091 {
1092         struct obd_device *obd = class_exp2obd(exp);
1093         struct lov_obd *lov = &obd->u.lov;
1094         struct lov_desc *ld = &lov->desc;
1095         int rc = 0;
1096         ENTRY;
1097
1098         if (vallen == NULL || val == NULL)
1099                 RETURN(-EFAULT);
1100
1101         lov_tgts_getref(obd);
1102
1103         if (KEY_IS(KEY_MAX_EASIZE)) {
1104                 *((u32 *)val) = exp->exp_connect_data.ocd_max_easize;
1105         } else if (KEY_IS(KEY_DEFAULT_EASIZE)) {
1106                 u32 def_stripe_count = min_t(u32, ld->ld_default_stripe_count,
1107                                              LOV_MAX_STRIPE_COUNT);
1108
1109                 *((u32 *)val) = lov_mds_md_size(def_stripe_count, LOV_MAGIC_V3);
1110         } else if (KEY_IS(KEY_TGT_COUNT)) {
1111                 *((int *)val) = lov->desc.ld_tgt_count;
1112         } else {
1113                 rc = -EINVAL;
1114         }
1115
1116         lov_tgts_putref(obd);
1117
1118         RETURN(rc);
1119 }
1120
1121 static int lov_set_info_async(const struct lu_env *env, struct obd_export *exp,
1122                               __u32 keylen, void *key,
1123                               __u32 vallen, void *val,
1124                               struct ptlrpc_request_set *set)
1125 {
1126         struct obd_device *obd = class_exp2obd(exp);
1127         struct lov_obd *lov = &obd->u.lov;
1128         struct lov_tgt_desc *tgt;
1129         bool do_inactive = false, no_set = false;
1130         u32 i;
1131         int rc = 0;
1132         int err;
1133
1134         ENTRY;
1135
1136         if (set == NULL) {
1137                 no_set = true;
1138                 set = ptlrpc_prep_set();
1139                 if (!set)
1140                         RETURN(-ENOMEM);
1141         }
1142
1143         lov_tgts_getref(obd);
1144
1145         if (KEY_IS(KEY_CHECKSUM))
1146                 do_inactive = true;
1147
1148         for (i = 0; i < lov->desc.ld_tgt_count; i++) {
1149                 tgt = lov->lov_tgts[i];
1150
1151                 /* OST was disconnected */
1152                 if (tgt == NULL || tgt->ltd_exp == NULL)
1153                         continue;
1154
1155                 /* OST is inactive and we don't want inactive OSCs */
1156                 if (!tgt->ltd_active && !do_inactive)
1157                         continue;
1158
1159                 err = obd_set_info_async(env, tgt->ltd_exp, keylen, key,
1160                                          vallen, val, set);
1161
1162                 if (rc == 0)
1163                         rc = err;
1164         }
1165
1166         /* cycle through MDC target for Data-on-MDT */
1167         for (i = 0; i < LOV_MDC_TGT_MAX; i++) {
1168                 struct obd_device *mdc;
1169
1170                 mdc = lov->lov_mdc_tgts[i].lmtd_mdc;
1171                 if (mdc == NULL)
1172                         continue;
1173
1174                 err = obd_set_info_async(env, mdc->obd_self_export,
1175                                          keylen, key, vallen, val, set);
1176                 if (rc == 0)
1177                         rc = err;
1178         }
1179
1180         lov_tgts_putref(obd);
1181         if (no_set) {
1182                 err = ptlrpc_set_wait(env, set);
1183                 if (rc == 0)
1184                         rc = err;
1185                 ptlrpc_set_destroy(set);
1186         }
1187         RETURN(rc);
1188 }
1189
1190 void lov_stripe_lock(struct lov_stripe_md *md)
1191 __acquires(&md->lsm_lock)
1192 {
1193         LASSERT(md->lsm_lock_owner != current->pid);
1194         spin_lock(&md->lsm_lock);
1195         LASSERT(md->lsm_lock_owner == 0);
1196         md->lsm_lock_owner = current->pid;
1197 }
1198
1199 void lov_stripe_unlock(struct lov_stripe_md *md)
1200 __releases(&md->lsm_lock)
1201 {
1202         LASSERT(md->lsm_lock_owner == current->pid);
1203         md->lsm_lock_owner = 0;
1204         spin_unlock(&md->lsm_lock);
1205 }
1206
1207 static int lov_quotactl(struct obd_device *obd, struct obd_export *exp,
1208                         struct obd_quotactl *oqctl)
1209 {
1210         struct lov_obd *lov = &obd->u.lov;
1211         struct lov_tgt_desc *tgt;
1212         struct pool_desc *pool = NULL;
1213         __u64 curspace = 0;
1214         __u64 bhardlimit = 0;
1215         int i, rc = 0;
1216
1217         ENTRY;
1218         if (oqctl->qc_cmd != Q_GETOQUOTA &&
1219             oqctl->qc_cmd != LUSTRE_Q_SETQUOTA &&
1220             oqctl->qc_cmd != LUSTRE_Q_GETQUOTAPOOL) {
1221                 rc = -EFAULT;
1222                 CERROR("%s: bad quota opc %x for lov obd: rc = %d\n",
1223                        obd->obd_name, oqctl->qc_cmd, rc);
1224                 RETURN(rc);
1225         }
1226
1227         if (oqctl->qc_cmd == LUSTRE_Q_GETQUOTAPOOL) {
1228                 pool = lov_pool_find(obd, oqctl->qc_poolname);
1229                 if (!pool)
1230                         RETURN(-ENOENT);
1231                 /* Set Q_GETOQUOTA back as targets report it's own
1232                  * usage and doesn't care about pools */
1233                 oqctl->qc_cmd = Q_GETOQUOTA;
1234         }
1235
1236         /* for lov tgt */
1237         lov_tgts_getref(obd);
1238         for (i = 0; i < lov->desc.ld_tgt_count; i++) {
1239                 int err;
1240
1241                 tgt = lov->lov_tgts[i];
1242
1243                 if (!tgt)
1244                         continue;
1245
1246                 if (pool &&
1247                     tgt_check_index(tgt->ltd_index, &pool->pool_obds))
1248                         continue;
1249
1250                 if (!tgt->ltd_active || tgt->ltd_reap) {
1251                         if (oqctl->qc_cmd == Q_GETOQUOTA &&
1252                             lov->lov_tgts[i]->ltd_activate) {
1253                                 rc = -ENETDOWN;
1254                                 CERROR("%s: ost %d is inactive: rc = %d\n",
1255                                        obd->obd_name, i, rc);
1256                         } else {
1257                                 CDEBUG(D_HA, "ost %d is inactive\n", i);
1258                         }
1259                         continue;
1260                 }
1261
1262                 err = obd_quotactl(tgt->ltd_exp, oqctl);
1263                 if (err) {
1264                         if (tgt->ltd_active && !rc)
1265                                 rc = err;
1266                         continue;
1267                 }
1268
1269                 if (oqctl->qc_cmd == Q_GETOQUOTA) {
1270                         curspace += oqctl->qc_dqblk.dqb_curspace;
1271                         bhardlimit += oqctl->qc_dqblk.dqb_bhardlimit;
1272                 }
1273         }
1274         lov_tgts_putref(obd);
1275         if (pool)
1276                 lov_pool_putref(pool);
1277
1278         if (oqctl->qc_cmd == Q_GETOQUOTA) {
1279                 oqctl->qc_dqblk.dqb_curspace = curspace;
1280                 oqctl->qc_dqblk.dqb_bhardlimit = bhardlimit;
1281         }
1282         RETURN(rc);
1283 }
1284
1285 static const struct obd_ops lov_obd_ops = {
1286         .o_owner                = THIS_MODULE,
1287         .o_setup                = lov_setup,
1288         .o_cleanup              = lov_cleanup,
1289         .o_connect              = lov_connect,
1290         .o_disconnect           = lov_disconnect,
1291         .o_statfs               = lov_statfs,
1292         .o_iocontrol            = lov_iocontrol,
1293         .o_get_info             = lov_get_info,
1294         .o_set_info_async       = lov_set_info_async,
1295         .o_notify               = lov_notify,
1296         .o_pool_new             = lov_pool_new,
1297         .o_pool_rem             = lov_pool_remove,
1298         .o_pool_add             = lov_pool_add,
1299         .o_pool_del             = lov_pool_del,
1300         .o_quotactl             = lov_quotactl,
1301 };
1302
1303 struct kmem_cache *lov_oinfo_slab;
1304
1305 static int __init lov_init(void)
1306 {
1307         int rc;
1308         ENTRY;
1309
1310         /* print an address of _any_ initialized kernel symbol from this
1311          * module, to allow debugging with gdb that doesn't support data
1312          * symbols from modules.*/
1313         CDEBUG(D_INFO, "Lustre LOV module (%p).\n", &lov_caches);
1314
1315         rc = lu_kmem_init(lov_caches);
1316         if (rc)
1317                 return rc;
1318
1319         lov_oinfo_slab = kmem_cache_create("lov_oinfo",
1320                                            sizeof(struct lov_oinfo), 0,
1321                                            SLAB_HWCACHE_ALIGN, NULL);
1322         if (lov_oinfo_slab == NULL) {
1323                 lu_kmem_fini(lov_caches);
1324                 return -ENOMEM;
1325         }
1326
1327         rc = class_register_type(&lov_obd_ops, NULL, true,
1328                                  LUSTRE_LOV_NAME, &lov_device_type);
1329         if (rc) {
1330                 kmem_cache_destroy(lov_oinfo_slab);
1331                 lu_kmem_fini(lov_caches);
1332         }
1333
1334         RETURN(rc);
1335 }
1336
1337 static void __exit lov_exit(void)
1338 {
1339         class_unregister_type(LUSTRE_LOV_NAME);
1340         kmem_cache_destroy(lov_oinfo_slab);
1341         lu_kmem_fini(lov_caches);
1342 }
1343
1344 MODULE_AUTHOR("OpenSFS, Inc. <http://www.lustre.org/>");
1345 MODULE_DESCRIPTION("Lustre Logical Object Volume");
1346 MODULE_VERSION(LUSTRE_VERSION_STRING);
1347 MODULE_LICENSE("GPL");
1348
1349 module_init(lov_init);
1350 module_exit(lov_exit);