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  * Lustre is a trademark of Sun Microsystems, Inc.
  31  *
  32  * lustre/lov/lov_obd.c
  33  *
  34  * Author: Phil Schwan <phil@clusterfs.com>
  35  * Author: Peter Braam <braam@clusterfs.com>
  36  * Author: Mike Shaver <shaver@clusterfs.com>
  37  * Author: Nathan Rutman <nathan@clusterfs.com>
  38  */
  39
  40 #define DEBUG_SUBSYSTEM S_LOV
  41 #include <libcfs/libcfs.h>
  42
  43 #include <cl_object.h>
  44 #include <lustre_dlm.h>
  45 #include <lustre_fid.h>
  46 #include <uapi/linux/lustre/lustre_ioctl.h>
  47 #include <lustre_lib.h>
  48 #include <lustre_mds.h>
  49 #include <lustre_net.h>
  50 #include <uapi/linux/lustre/lustre_param.h>
  51 #include <lustre_swab.h>
  52 #include <lprocfs_status.h>
  53 #include <obd_class.h>
  54 #include <obd_support.h>
  55
  56 #include "lov_internal.h"
  57
  58 /* Keep a refcount of lov->tgt usage to prevent racing with addition/deletion.
  59    Any function that expects lov_tgts to remain stationary must take a ref. */
  60 void lov_tgts_getref(struct obd_device *obd)
  61 {
  62         struct lov_obd *lov = &obd->u.lov;
  63
  64         /* nobody gets through here until lov_putref is done */
  65         mutex_lock(&lov->lov_lock);
  66         atomic_inc(&lov->lov_refcount);
  67         mutex_unlock(&lov->lov_lock);
  68         return;
  69 }
  70
  71 static void __lov_del_obd(struct obd_device *obd, struct lov_tgt_desc *tgt);
  72
  73 void lov_tgts_putref(struct obd_device *obd)
  74 {
  75         struct lov_obd *lov = &obd->u.lov;
  76
  77         mutex_lock(&lov->lov_lock);
  78         /* ok to dec to 0 more than once -- ltd_exp's will be null */
  79         if (atomic_dec_and_test(&lov->lov_refcount) && lov->lov_death_row) {
  80                 struct list_head kill = LIST_HEAD_INIT(kill);
  81                 struct lov_tgt_desc *tgt, *n;
  82                 int i;
  83
  84                 CDEBUG(D_CONFIG, "destroying %d lov targets\n",
  85                        lov->lov_death_row);
  86                 for (i = 0; i < lov->desc.ld_tgt_count; i++) {
  87                         tgt = lov->lov_tgts[i];
  88
  89                         if (!tgt || !tgt->ltd_reap)
  90                                 continue;
  91                         list_add(&tgt->ltd_kill, &kill);
  92                         /* XXX - right now there is a dependency on ld_tgt_count
  93                          * being the maximum tgt index for computing the
  94                          * mds_max_easize. So we can't shrink it. */
  95                         lov_ost_pool_remove(&lov->lov_packed, i);
  96                         lov->lov_tgts[i] = NULL;
  97                         lov->lov_death_row--;
  98                 }
  99                 mutex_unlock(&lov->lov_lock);
 100
 101                 list_for_each_entry_safe(tgt, n, &kill, ltd_kill) {
 102                         list_del(&tgt->ltd_kill);
 103                         /* Disconnect */
 104                         __lov_del_obd(obd, tgt);
 105                 }
 106         } else {
 107                 mutex_unlock(&lov->lov_lock);
 108         }
 109 }
 110
 111 static int lov_set_osc_active(struct obd_device *obd, struct obd_uuid *uuid,
 112                               enum obd_notify_event ev);
 113 static int lov_notify(struct obd_device *obd, struct obd_device *watched,
 114                       enum obd_notify_event ev);
 115
 116 int lov_connect_osc(struct obd_device *obd, u32 index, int activate,
 117                     struct obd_connect_data *data)
 118 {
 119         struct lov_obd *lov = &obd->u.lov;
 120         struct obd_uuid *tgt_uuid;
 121         struct obd_device *tgt_obd;
 122         static struct obd_uuid lov_osc_uuid = { "LOV_OSC_UUID" };
 123         struct obd_import *imp;
 124         int rc;
 125         ENTRY;
 126
 127         if (lov->lov_tgts[index] == NULL)
 128                 RETURN(-EINVAL);
 129
 130         tgt_uuid = &lov->lov_tgts[index]->ltd_uuid;
 131         tgt_obd = lov->lov_tgts[index]->ltd_obd;
 132
 133         if (!tgt_obd->obd_set_up) {
 134                 CERROR("Target %s not set up\n", obd_uuid2str(tgt_uuid));
 135                 RETURN(-EINVAL);
 136         }
 137
 138         /* override the sp_me from lov */
 139         tgt_obd->u.cli.cl_sp_me = lov->lov_sp_me;
 140
 141         if (data && (data->ocd_connect_flags & OBD_CONNECT_INDEX))
 142                 data->ocd_index = index;
 143
 144         /*
 145          * Divine LOV knows that OBDs under it are OSCs.
 146          */
 147         imp = tgt_obd->u.cli.cl_import;
 148
 149         if (activate) {
 150                 tgt_obd->obd_no_recov = 0;
 151                 /* FIXME this is probably supposed to be
 152                    ptlrpc_set_import_active.  Horrible naming. */
 153                 ptlrpc_activate_import(imp);
 154         }
 155
 156         rc = obd_register_observer(tgt_obd, obd);
 157         if (rc) {
 158                 CERROR("Target %s register_observer error %d\n",
 159                        obd_uuid2str(tgt_uuid), rc);
 160                 RETURN(rc);
 161         }
 162
 163         if (imp->imp_invalid) {
 164                 CDEBUG(D_CONFIG, "%s: not connecting - administratively disabled\n",
 165                        obd_uuid2str(tgt_uuid));
 166                 RETURN(0);
 167         }
 168
 169         rc = obd_connect(NULL, &lov->lov_tgts[index]->ltd_exp, tgt_obd,
 170                          &lov_osc_uuid, data, lov->lov_cache);
 171         if (rc || !lov->lov_tgts[index]->ltd_exp) {
 172                 CERROR("Target %s connect error %d\n",
 173                        obd_uuid2str(tgt_uuid), rc);
 174                 RETURN(-ENODEV);
 175         }
 176
 177         lov->lov_tgts[index]->ltd_reap = 0;
 178
 179         CDEBUG(D_CONFIG, "Connected tgt idx %d %s (%s) %sactive\n", index,
 180                obd_uuid2str(tgt_uuid), tgt_obd->obd_name, activate ? "":"in");
 181
 182         if (lov->lov_tgts_kobj) {
 183                 /* Even if we failed, that's ok */
 184                 rc = sysfs_create_link(lov->lov_tgts_kobj,
 185                                        &tgt_obd->obd_kset.kobj,
 186                                        tgt_obd->obd_name);
 187                 if (rc) {
 188                         CERROR("%s: can't register LOV target /sys/fs/lustre/%s/%s/target_obds/%s : rc = %d\n",
 189                                obd->obd_name, obd->obd_type->typ_name,
 190                                obd->obd_name,
 191                                lov->lov_tgts[index]->ltd_exp->exp_obd->obd_name,
 192                                rc);
 193                 }
 194         }
 195         RETURN(0);
 196 }
 197
 198 static int lov_connect(const struct lu_env *env,
 199                        struct obd_export **exp, struct obd_device *obd,
 200                        struct obd_uuid *cluuid, struct obd_connect_data *data,
 201                        void *localdata)
 202 {
 203         struct lov_obd *lov = &obd->u.lov;
 204         struct lov_tgt_desc *tgt;
 205         struct lustre_handle conn;
 206         int i, rc;
 207         ENTRY;
 208
 209         CDEBUG(D_CONFIG, "connect #%d\n", lov->lov_connects);
 210
 211         rc = class_connect(&conn, obd, cluuid);
 212         if (rc)
 213                 RETURN(rc);
 214
 215         *exp = class_conn2export(&conn);
 216
 217         /* Why should there ever be more than 1 connect? */
 218         lov->lov_connects++;
 219         LASSERT(lov->lov_connects == 1);
 220
 221         memset(&lov->lov_ocd, 0, sizeof(lov->lov_ocd));
 222         if (data)
 223                 lov->lov_ocd = *data;
 224
 225         lov_tgts_getref(obd);
 226
 227         if (localdata) {
 228                 lov->lov_cache = localdata;
 229                 cl_cache_incref(lov->lov_cache);
 230         }
 231
 232         for (i = 0; i < lov->desc.ld_tgt_count; i++) {
 233                 tgt = lov->lov_tgts[i];
 234                 if (!tgt || obd_uuid_empty(&tgt->ltd_uuid))
 235                         continue;
 236                 /* Flags will be lowest common denominator */
 237                 rc = lov_connect_osc(obd, i, tgt->ltd_activate, &lov->lov_ocd);
 238                 if (rc) {
 239                         CERROR("%s: lov connect tgt %d failed: %d\n",
 240                                obd->obd_name, i, rc);
 241                         continue;
 242                 }
 243                 /* connect to administrative disabled ost */
 244                 if (!lov->lov_tgts[i]->ltd_exp)
 245                         continue;
 246
 247                 rc = lov_notify(obd, lov->lov_tgts[i]->ltd_exp->exp_obd,
 248                                 OBD_NOTIFY_CONNECT);
 249                 if (rc) {
 250                         CERROR("%s error sending notify %d\n",
 251                                obd->obd_name, rc);
 252                 }
 253         }
 254
 255         lov_tgts_putref(obd);
 256
 257         RETURN(0);
 258 }
 259
 260 static int lov_disconnect_obd(struct obd_device *obd, struct lov_tgt_desc *tgt)
 261 {
 262         struct lov_obd *lov = &obd->u.lov;
 263         struct obd_device *osc_obd;
 264         int rc;
 265         ENTRY;
 266
 267         osc_obd = class_exp2obd(tgt->ltd_exp);
 268         CDEBUG(D_CONFIG, "%s: disconnecting target %s\n",
 269                obd->obd_name, osc_obd->obd_name);
 270
 271         if (tgt->ltd_active) {
 272                 tgt->ltd_active = 0;
 273                 lov->desc.ld_active_tgt_count--;
 274                 tgt->ltd_exp->exp_obd->obd_inactive = 1;
 275         }
 276
 277         if (osc_obd) {
 278                 if (lov->lov_tgts_kobj)
 279                         sysfs_remove_link(lov->lov_tgts_kobj,
 280                                           osc_obd->obd_name);
 281
 282                 /* Pass it on to our clients.
 283                  * XXX This should be an argument to disconnect,
 284                  * XXX not a back-door flag on the OBD.  Ah well.
 285                  */
 286                 osc_obd->obd_force = obd->obd_force;
 287                 osc_obd->obd_fail = obd->obd_fail;
 288                 osc_obd->obd_no_recov = obd->obd_no_recov;
 289
 290                 if (lov->targets_proc_entry != NULL)
 291                         lprocfs_remove_proc_entry(osc_obd->obd_name,
 292                                                   lov->targets_proc_entry);
 293         }
 294
 295         obd_register_observer(osc_obd, NULL);
 296
 297         rc = obd_disconnect(tgt->ltd_exp);
 298         if (rc) {
 299                 CERROR("Target %s disconnect error %d\n",
 300                        tgt->ltd_uuid.uuid, rc);
 301                 rc = 0;
 302         }
 303
 304         tgt->ltd_exp = NULL;
 305         RETURN(0);
 306 }
 307
 308 static int lov_disconnect(struct obd_export *exp)
 309 {
 310         struct obd_device *obd = class_exp2obd(exp);
 311         struct lov_obd *lov = &obd->u.lov;
 312         u32 index;
 313         int rc;
 314
 315         ENTRY;
 316         if (!lov->lov_tgts)
 317                 goto out;
 318
 319         /* Only disconnect the underlying layers on the final disconnect. */
 320         lov->lov_connects--;
 321         if (lov->lov_connects != 0) {
 322                 /* why should there be more than 1 connect? */
 323                 CWARN("%s: unexpected disconnect #%d\n",
 324                       obd->obd_name, lov->lov_connects);
 325                 goto out;
 326         }
 327
 328         /* hold another ref so lov_del_obd() doesn't spin in putref each time */
 329         lov_tgts_getref(obd);
 330
 331         for (index = 0; index < lov->desc.ld_tgt_count; index++) {
 332                 if (lov->lov_tgts[index] && lov->lov_tgts[index]->ltd_exp) {
 333                         /* Disconnection is the last we know about an OBD */
 334                         lov_del_target(obd, index, NULL,
 335                                        lov->lov_tgts[index]->ltd_gen);
 336                 }
 337         }
 338         lov_tgts_putref(obd);
 339
 340 out:
 341         rc = class_disconnect(exp); /* bz 9811 */
 342         RETURN(rc);
 343 }
 344
 345 /* Error codes:
 346  *
 347  *  -EINVAL  : UUID can't be found in the LOV's target list
 348  *  -ENOTCONN: The UUID is found, but the target connection is bad (!)
 349  *  -EBADF   : The UUID is found, but the OBD is the wrong type (!)
 350  *  any >= 0 : is log target index
 351  */
 352 static int lov_set_osc_active(struct obd_device *obd, struct obd_uuid *uuid,
 353                               enum obd_notify_event ev)
 354 {
 355         struct lov_obd *lov = &obd->u.lov;
 356         struct lov_tgt_desc *tgt;
 357         int index, activate, active;
 358         ENTRY;
 359
 360         CDEBUG(D_INFO, "Searching in lov %p for uuid %s event(%d)\n",
 361                lov, uuid->uuid, ev);
 362
 363         lov_tgts_getref(obd);
 364         for (index = 0; index < lov->desc.ld_tgt_count; index++) {
 365                 tgt = lov->lov_tgts[index];
 366                 if (!tgt)
 367                         continue;
 368                 if (obd_uuid_equals(uuid, &tgt->ltd_uuid))
 369                         break;
 370         }
 371
 372         if (index == lov->desc.ld_tgt_count)
 373                 GOTO(out, index = -EINVAL);
 374
 375         if (ev == OBD_NOTIFY_DEACTIVATE || ev == OBD_NOTIFY_ACTIVATE) {
 376                 activate = (ev == OBD_NOTIFY_ACTIVATE) ? 1 : 0;
 377
 378                 /*
 379                  * LU-642, initially inactive OSC could miss the obd_connect,
 380                  * we make up for it here.
 381                  */
 382                 if (activate && !tgt->ltd_exp) {
 383                         int rc;
 384                         struct obd_uuid lov_osc_uuid = {"LOV_OSC_UUID"};
 385
 386                         rc = obd_connect(NULL, &tgt->ltd_exp, tgt->ltd_obd,
 387                                          &lov_osc_uuid, &lov->lov_ocd,
 388                                          lov->lov_cache);
 389                         if (rc || tgt->ltd_exp == NULL)
 390                                 GOTO(out, index = rc);
 391                 }
 392
 393                 if (lov->lov_tgts[index]->ltd_activate == activate) {
 394                         CDEBUG(D_INFO, "OSC %s already %sactivate!\n",
 395                                uuid->uuid, activate ? "" : "de");
 396                 } else {
 397                         lov->lov_tgts[index]->ltd_activate = activate;
 398                         CDEBUG(D_CONFIG, "%sactivate OSC %s\n",
 399                                activate ? "" : "de", obd_uuid2str(uuid));
 400                 }
 401
 402         } else if (ev == OBD_NOTIFY_INACTIVE || ev == OBD_NOTIFY_ACTIVE) {
 403                 active = (ev == OBD_NOTIFY_ACTIVE) ? 1 : 0;
 404
 405                 if (lov->lov_tgts[index]->ltd_active == active) {
 406                         CDEBUG(D_INFO, "OSC %s already %sactive!\n",
 407                                uuid->uuid, active ? "" : "in");
 408                         GOTO(out, index);
 409                 } else {
 410                         CDEBUG(D_CONFIG, "Marking OSC %s %sactive\n",
 411                                obd_uuid2str(uuid), active ? "" : "in");
 412                 }
 413
 414                 lov->lov_tgts[index]->ltd_active = active;
 415                 if (active) {
 416                         lov->desc.ld_active_tgt_count++;
 417                         lov->lov_tgts[index]->ltd_exp->exp_obd->obd_inactive = 0;
 418                 } else {
 419                         lov->desc.ld_active_tgt_count--;
 420                         lov->lov_tgts[index]->ltd_exp->exp_obd->obd_inactive = 1;
 421                 }
 422         } else {
 423                 CERROR("%s: unknown event %d for uuid %s\n", obd->obd_name,
 424                        ev, uuid->uuid);
 425         }
 426
 427         if (tgt->ltd_exp)
 428                 CDEBUG(D_INFO, "%s: lov idx %d conn %llx\n", obd_uuid2str(uuid),
 429                        index, tgt->ltd_exp->exp_handle.h_cookie);
 430
 431  out:
 432         lov_tgts_putref(obd);
 433         RETURN(index);
 434 }
 435
 436 static int lov_notify(struct obd_device *obd, struct obd_device *watched,
 437                       enum obd_notify_event ev)
 438 {
 439         int rc = 0;
 440         struct lov_obd *lov = &obd->u.lov;
 441         ENTRY;
 442
 443         down_read(&lov->lov_notify_lock);
 444         if (!lov->lov_connects)
 445                 GOTO(out_notify_lock, rc = 0);
 446
 447         if (ev == OBD_NOTIFY_ACTIVE || ev == OBD_NOTIFY_INACTIVE ||
 448             ev == OBD_NOTIFY_ACTIVATE || ev == OBD_NOTIFY_DEACTIVATE) {
 449                 struct obd_uuid *uuid;
 450
 451                 LASSERT(watched);
 452
 453                 if (strcmp(watched->obd_type->typ_name, LUSTRE_OSC_NAME)) {
 454                         CERROR("unexpected notification of %s %s\n",
 455                                watched->obd_type->typ_name, watched->obd_name);
 456                         GOTO(out_notify_lock, rc = -EINVAL);
 457                 }
 458
 459                 uuid = &watched->u.cli.cl_target_uuid;
 460
 461                 /* Set OSC as active before notifying the observer, so the
 462                  * observer can use the OSC normally.
 463                  */
 464                 rc = lov_set_osc_active(obd, uuid, ev);
 465                 if (rc < 0) {
 466                         CERROR("%s: event %d failed: rc = %d\n", obd->obd_name,
 467                                ev, rc);
 468                         GOTO(out_notify_lock, rc);
 469                 }
 470         }
 471
 472         /* Pass the notification up the chain. */
 473         rc = obd_notify_observer(obd, watched, ev);
 474
 475 out_notify_lock:
 476         up_read(&lov->lov_notify_lock);
 477
 478         RETURN(rc);
 479 }
 480
 481 static int lov_add_target(struct obd_device *obd, struct obd_uuid *uuidp,
 482                           u32 index, int gen, int active)
 483 {
 484         struct lov_obd *lov = &obd->u.lov;
 485         struct lov_tgt_desc *tgt;
 486         struct obd_device *tgt_obd;
 487         int rc;
 488
 489         ENTRY;
 490         CDEBUG(D_CONFIG, "uuid:%s idx:%u gen:%d active:%d\n",
 491                uuidp->uuid, index, gen, active);
 492
 493         if (gen <= 0) {
 494                 CERROR("%s: request to add '%s' with invalid generation: %d\n",
 495                        obd->obd_name, uuidp->uuid, gen);
 496                 RETURN(-EINVAL);
 497         }
 498
 499         tgt_obd = class_find_client_obd(uuidp, LUSTRE_OSC_NAME, &obd->obd_uuid);
 500         if (tgt_obd == NULL)
 501                 RETURN(-EINVAL);
 502
 503         mutex_lock(&lov->lov_lock);
 504
 505         if ((index < lov->lov_tgt_size) && (lov->lov_tgts[index] != NULL)) {
 506                 tgt = lov->lov_tgts[index];
 507                 rc = -EEXIST;
 508                 CERROR("%s: UUID %s already assigned at index %d: rc = %d\n",
 509                        obd->obd_name, obd_uuid2str(&tgt->ltd_uuid), index, rc);
 510                 mutex_unlock(&lov->lov_lock);
 511                 RETURN(rc);
 512         }
 513
 514         if (index >= lov->lov_tgt_size) {
 515                 /* We need to reallocate the lov target array. */
 516                 struct lov_tgt_desc **newtgts, **old = NULL;
 517                 __u32 newsize, oldsize = 0;
 518
 519                 newsize = max(lov->lov_tgt_size, (__u32)2);
 520                 while (newsize < index + 1)
 521                         newsize = newsize << 1;
 522                 OBD_ALLOC(newtgts, sizeof(*newtgts) * newsize);
 523                 if (newtgts == NULL) {
 524                         mutex_unlock(&lov->lov_lock);
 525                         RETURN(-ENOMEM);
 526                 }
 527
 528                 if (lov->lov_tgt_size) {
 529                         memcpy(newtgts, lov->lov_tgts, sizeof(*newtgts) *
 530                                lov->lov_tgt_size);
 531                         old = lov->lov_tgts;
 532                         oldsize = lov->lov_tgt_size;
 533                 }
 534
 535                 lov->lov_tgts = newtgts;
 536                 lov->lov_tgt_size = newsize;
 537                 smp_rmb();
 538                 if (old)
 539                         OBD_FREE(old, sizeof(*old) * oldsize);
 540
 541                 CDEBUG(D_CONFIG, "tgts: %p size: %d\n",
 542                        lov->lov_tgts, lov->lov_tgt_size);
 543         }
 544
 545         OBD_ALLOC_PTR(tgt);
 546         if (!tgt) {
 547                 mutex_unlock(&lov->lov_lock);
 548                 RETURN(-ENOMEM);
 549         }
 550
 551         rc = lov_ost_pool_add(&lov->lov_packed, index, lov->lov_tgt_size);
 552         if (rc) {
 553                 mutex_unlock(&lov->lov_lock);
 554                 OBD_FREE_PTR(tgt);
 555                 RETURN(rc);
 556         }
 557
 558         tgt->ltd_uuid = *uuidp;
 559         tgt->ltd_obd = tgt_obd;
 560         /* XXX - add a sanity check on the generation number. */
 561         tgt->ltd_gen = gen;
 562         tgt->ltd_index = index;
 563         tgt->ltd_activate = active;
 564         lov->lov_tgts[index] = tgt;
 565         if (index >= lov->desc.ld_tgt_count)
 566                 lov->desc.ld_tgt_count = index + 1;
 567
 568         mutex_unlock(&lov->lov_lock);
 569
 570         CDEBUG(D_CONFIG, "idx=%d ltd_gen=%d ld_tgt_count=%d\n",
 571                 index, tgt->ltd_gen, lov->desc.ld_tgt_count);
 572
 573         if (lov->lov_connects == 0) {
 574                 /* lov_connect hasn't been called yet. We'll do the
 575                    lov_connect_osc on this target when that fn first runs,
 576                    because we don't know the connect flags yet. */
 577                 RETURN(0);
 578         }
 579
 580         lov_tgts_getref(obd);
 581
 582         rc = lov_connect_osc(obd, index, active, &lov->lov_ocd);
 583         if (rc)
 584                 GOTO(out, rc);
 585
 586         /* connect to administrative disabled ost */
 587         if (!tgt->ltd_exp)
 588                 GOTO(out, rc = 0);
 589
 590         rc = lov_notify(obd, tgt->ltd_exp->exp_obd,
 591                         active ? OBD_NOTIFY_CONNECT : OBD_NOTIFY_INACTIVE);
 592
 593 out:
 594         if (rc) {
 595                 CERROR("%s: add failed, deleting %s: rc = %d\n",
 596                        obd->obd_name, obd_uuid2str(&tgt->ltd_uuid), rc);
 597                 lov_del_target(obd, index, NULL, 0);
 598         }
 599         lov_tgts_putref(obd);
 600         RETURN(rc);
 601 }
 602
 603 /* Schedule a target for deletion */
 604 int lov_del_target(struct obd_device *obd, u32 index,
 605                    struct obd_uuid *uuidp, int gen)
 606 {
 607         struct lov_obd *lov = &obd->u.lov;
 608         int count = lov->desc.ld_tgt_count;
 609         int rc = 0;
 610         ENTRY;
 611
 612         if (index >= count) {
 613                 CERROR("LOV target index %d >= number of LOV OBDs %d.\n",
 614                        index, count);
 615                 RETURN(-EINVAL);
 616         }
 617
 618         /* to make sure there's no ongoing lov_notify() now */
 619         down_write(&lov->lov_notify_lock);
 620         lov_tgts_getref(obd);
 621
 622         if (!lov->lov_tgts[index]) {
 623                 CERROR("LOV target at index %d is not setup.\n", index);
 624                 GOTO(out, rc = -EINVAL);
 625         }
 626
 627         if (uuidp && !obd_uuid_equals(uuidp, &lov->lov_tgts[index]->ltd_uuid)) {
 628                 CERROR("LOV target UUID %s at index %d doesn't match %s.\n",
 629                        lov_uuid2str(lov, index), index,
 630                        obd_uuid2str(uuidp));
 631                 GOTO(out, rc = -EINVAL);
 632         }
 633
 634         CDEBUG(D_CONFIG, "uuid: %s idx: %d gen: %d exp: %p active: %d\n",
 635                lov_uuid2str(lov, index), index,
 636                lov->lov_tgts[index]->ltd_gen, lov->lov_tgts[index]->ltd_exp,
 637                lov->lov_tgts[index]->ltd_active);
 638
 639         lov->lov_tgts[index]->ltd_reap = 1;
 640         lov->lov_death_row++;
 641         /* we really delete it from lov_tgts_putref() */
 642 out:
 643         lov_tgts_putref(obd);
 644         up_write(&lov->lov_notify_lock);
 645
 646         RETURN(rc);
 647 }
 648
 649 static void __lov_del_obd(struct obd_device *obd, struct lov_tgt_desc *tgt)
 650 {
 651         struct obd_device *osc_obd;
 652
 653         LASSERT(tgt);
 654         LASSERT(tgt->ltd_reap);
 655
 656         osc_obd = class_exp2obd(tgt->ltd_exp);
 657
 658         CDEBUG(D_CONFIG, "Removing tgt %s : %s\n",
 659                tgt->ltd_uuid.uuid,
 660                osc_obd ? osc_obd->obd_name : "<no obd>");
 661
 662         if (tgt->ltd_exp)
 663                 lov_disconnect_obd(obd, tgt);
 664
 665         OBD_FREE_PTR(tgt);
 666
 667         /* Manual cleanup - no cleanup logs to clean up the osc's.  We must
 668            do it ourselves. And we can't do it from lov_cleanup,
 669            because we just lost our only reference to it. */
 670         if (osc_obd)
 671                 class_manual_cleanup(osc_obd);
 672 }
 673
 674 void lov_fix_desc_stripe_size(__u64 *val)
 675 {
 676         if (*val < LOV_MIN_STRIPE_SIZE) {
 677                 if (*val != 0)
 678                         LCONSOLE_INFO("Increasing default stripe size to "
 679                                       "minimum %u\n",
 680                                       LOV_DESC_STRIPE_SIZE_DEFAULT);
 681                 *val = LOV_DESC_STRIPE_SIZE_DEFAULT;
 682         } else if (*val & (LOV_MIN_STRIPE_SIZE - 1)) {
 683                 *val &= ~(LOV_MIN_STRIPE_SIZE - 1);
 684                 LCONSOLE_WARN("Changing default stripe size to %llu (a "
 685                               "multiple of %u)\n",
 686                               *val, LOV_MIN_STRIPE_SIZE);
 687         }
 688 }
 689
 690 void lov_fix_desc_stripe_count(__u32 *val)
 691 {
 692         if (*val == 0)
 693                 *val = 1;
 694 }
 695
 696 void lov_fix_desc_pattern(__u32 *val)
 697 {
 698         /* from lov_setstripe */
 699         if ((*val != 0) && (*val != LOV_PATTERN_RAID0)) {
 700                 LCONSOLE_WARN("Unknown stripe pattern: %#x\n", *val);
 701                 *val = 0;
 702         }
 703 }
 704
 705 void lov_fix_desc_qos_maxage(__u32 *val)
 706 {
 707         if (*val == 0)
 708                 *val = LOV_DESC_QOS_MAXAGE_DEFAULT;
 709 }
 710
 711 void lov_fix_desc(struct lov_desc *desc)
 712 {
 713         lov_fix_desc_stripe_size(&desc->ld_default_stripe_size);
 714         lov_fix_desc_stripe_count(&desc->ld_default_stripe_count);
 715         lov_fix_desc_pattern(&desc->ld_pattern);
 716         lov_fix_desc_qos_maxage(&desc->ld_qos_maxage);
 717 }
 718
 719 int lov_setup(struct obd_device *obd, struct lustre_cfg *lcfg)
 720 {
 721         struct lov_desc *desc;
 722         struct lov_obd *lov = &obd->u.lov;
 723         int rc;
 724         ENTRY;
 725
 726         if (LUSTRE_CFG_BUFLEN(lcfg, 1) < 1) {
 727                 CERROR("LOV setup requires a descriptor\n");
 728                 RETURN(-EINVAL);
 729         }
 730
 731         desc = (struct lov_desc *)lustre_cfg_buf(lcfg, 1);
 732
 733         if (sizeof(*desc) > LUSTRE_CFG_BUFLEN(lcfg, 1)) {
 734                 CERROR("descriptor size wrong: %d > %d\n",
 735                        (int)sizeof(*desc), LUSTRE_CFG_BUFLEN(lcfg, 1));
 736                 RETURN(-EINVAL);
 737         }
 738
 739         if (desc->ld_magic != LOV_DESC_MAGIC) {
 740                 if (desc->ld_magic == __swab32(LOV_DESC_MAGIC)) {
 741                             CDEBUG(D_OTHER, "%s: Swabbing lov desc %p\n",
 742                                    obd->obd_name, desc);
 743                             lustre_swab_lov_desc(desc);
 744                 } else {
 745                         CERROR("%s: Bad lov desc magic: %#x\n",
 746                                obd->obd_name, desc->ld_magic);
 747                         RETURN(-EINVAL);
 748                 }
 749         }
 750
 751         lov_fix_desc(desc);
 752
 753         desc->ld_active_tgt_count = 0;
 754         lov->desc = *desc;
 755         lov->lov_tgt_size = 0;
 756
 757         mutex_init(&lov->lov_lock);
 758         atomic_set(&lov->lov_refcount, 0);
 759         lov->lov_sp_me = LUSTRE_SP_CLI;
 760
 761         init_rwsem(&lov->lov_notify_lock);
 762
 763         lov->lov_pools_hash_body = cfs_hash_create("POOLS", HASH_POOLS_CUR_BITS,
 764                                                    HASH_POOLS_MAX_BITS,
 765                                                    HASH_POOLS_BKT_BITS, 0,
 766                                                    CFS_HASH_MIN_THETA,
 767                                                    CFS_HASH_MAX_THETA,
 768                                                    &pool_hash_operations,
 769                                                    CFS_HASH_DEFAULT);
 770         INIT_LIST_HEAD(&lov->lov_pool_list);
 771         lov->lov_pool_count = 0;
 772         rc = lov_ost_pool_init(&lov->lov_packed, 0);
 773         if (rc)
 774                 GOTO(out, rc);
 775
 776         rc = lov_tunables_init(obd);
 777         if (rc)
 778                 GOTO(out, rc);
 779
 780         lov->lov_tgts_kobj = kobject_create_and_add("target_obds",
 781                                                     &obd->obd_kset.kobj);
 782
 783 out:
 784         return rc;
 785 }
 786
 787 static int lov_cleanup(struct obd_device *obd)
 788 {
 789         struct lov_obd *lov = &obd->u.lov;
 790         struct list_head *pos, *tmp;
 791         struct pool_desc *pool;
 792         ENTRY;
 793
 794         if (lov->lov_tgts_kobj) {
 795                 kobject_put(lov->lov_tgts_kobj);
 796                 lov->lov_tgts_kobj = NULL;
 797         }
 798
 799         list_for_each_safe(pos, tmp, &lov->lov_pool_list) {
 800                 pool = list_entry(pos, struct pool_desc, pool_list);
 801                 /* free pool structs */
 802                 CDEBUG(D_INFO, "delete pool %p\n", pool);
 803                 /* In the function below, .hs_keycmp resolves to
 804                  * pool_hashkey_keycmp() */
 805                 /* coverity[overrun-buffer-val] */
 806                 lov_pool_del(obd, pool->pool_name);
 807         }
 808         cfs_hash_putref(lov->lov_pools_hash_body);
 809         lov_ost_pool_free(&lov->lov_packed);
 810
 811         lprocfs_obd_cleanup(obd);
 812         if (lov->lov_tgts) {
 813                 int i;
 814                 lov_tgts_getref(obd);
 815                 for (i = 0; i < lov->desc.ld_tgt_count; i++) {
 816                         if (!lov->lov_tgts[i])
 817                                 continue;
 818
 819                         /* Inactive targets may never have connected */
 820                         if (lov->lov_tgts[i]->ltd_active ||
 821                             atomic_read(&lov->lov_refcount))
 822                                 /* We should never get here - these
 823                                  * should have been removed in the
 824                                  * disconnect. */
 825                                 CERROR("%s: lov tgt %d not cleaned! "
 826                                        "deathrow=%d, lovrc=%d\n",
 827                                        obd->obd_name, i, lov->lov_death_row,
 828                                        atomic_read(&lov->lov_refcount));
 829                         lov_del_target(obd, i, NULL, 0);
 830                 }
 831                 lov_tgts_putref(obd);
 832                 OBD_FREE(lov->lov_tgts, sizeof(*lov->lov_tgts) *
 833                          lov->lov_tgt_size);
 834                 lov->lov_tgt_size = 0;
 835         }
 836
 837         if (lov->lov_cache != NULL) {
 838                 cl_cache_decref(lov->lov_cache);
 839                 lov->lov_cache = NULL;
 840         }
 841
 842         RETURN(0);
 843 }
 844
 845 int lov_process_config_base(struct obd_device *obd, struct lustre_cfg *lcfg,
 846                             u32 *indexp, int *genp)
 847 {
 848         struct obd_uuid obd_uuid;
 849         int cmd;
 850         int rc = 0;
 851
 852         ENTRY;
 853         switch (cmd = lcfg->lcfg_command) {
 854         case LCFG_ADD_MDC:
 855         case LCFG_DEL_MDC:
 856                 break;
 857         case LCFG_LOV_ADD_OBD:
 858         case LCFG_LOV_ADD_INA:
 859         case LCFG_LOV_DEL_OBD: {
 860                 u32 index;
 861                 int gen;
 862
 863                 /* lov_modify_tgts add  0:lov_mdsA  1:ost1_UUID  2:0  3:1 */
 864                 if (LUSTRE_CFG_BUFLEN(lcfg, 1) > sizeof(obd_uuid.uuid))
 865                         GOTO(out, rc = -EINVAL);
 866
 867                 obd_str2uuid(&obd_uuid,  lustre_cfg_buf(lcfg, 1));
 868
 869                 rc = kstrtou32(lustre_cfg_buf(lcfg, 2), 10, indexp);
 870                 if (rc)
 871                         GOTO(out, rc);
 872                 rc = kstrtoint(lustre_cfg_buf(lcfg, 3), 10, genp);
 873                 if (rc)
 874                         GOTO(out, rc);
 875                 index = *indexp;
 876                 gen = *genp;
 877                 if (cmd == LCFG_LOV_ADD_OBD)
 878                         rc = lov_add_target(obd, &obd_uuid, index, gen, 1);
 879                 else if (cmd == LCFG_LOV_ADD_INA)
 880                         rc = lov_add_target(obd, &obd_uuid, index, gen, 0);
 881                 else
 882                         rc = lov_del_target(obd, index, &obd_uuid, gen);
 883
 884                 GOTO(out, rc);
 885         }
 886         case LCFG_PARAM: {
 887                 struct lov_desc *desc = &(obd->u.lov.desc);
 888                 ssize_t count;
 889
 890                 if (!desc)
 891                         GOTO(out, rc = -EINVAL);
 892
 893                 count = class_modify_config(lcfg, PARAM_LOV,
 894                                             &obd->obd_kset.kobj);
 895                 GOTO(out, rc = count < 0 ? count : 0);
 896         }
 897         case LCFG_POOL_NEW:
 898         case LCFG_POOL_ADD:
 899         case LCFG_POOL_DEL:
 900         case LCFG_POOL_REM:
 901                 GOTO(out, rc);
 902
 903         default: {
 904                 CERROR("Unknown command: %d\n", lcfg->lcfg_command);
 905                 GOTO(out, rc = -EINVAL);
 906
 907         }
 908         }
 909 out:
 910         RETURN(rc);
 911 }
 912
 913 static int lov_statfs(const struct lu_env *env, struct obd_export *exp,
 914                       struct obd_statfs *osfs, time64_t max_age, __u32 flags)
 915 {
 916         struct obd_device *obd = class_exp2obd(exp);
 917         struct lov_obd *lov = &obd->u.lov;
 918         struct obd_info oinfo = {
 919                 .oi_osfs = osfs,
 920                 .oi_flags = flags,
 921         };
 922         struct ptlrpc_request_set *rqset;
 923         struct lov_request_set *set = NULL;
 924         struct lov_request *req;
 925         int rc = 0;
 926         int rc2;
 927
 928         ENTRY;
 929
 930         rqset = ptlrpc_prep_set();
 931         if (rqset == NULL)
 932                 RETURN(-ENOMEM);
 933
 934         rc = lov_prep_statfs_set(obd, &oinfo, &set);
 935         if (rc < 0)
 936                 GOTO(out_rqset, rc);
 937
 938         list_for_each_entry(req, &set->set_list, rq_link) {
 939                 rc = obd_statfs_async(lov->lov_tgts[req->rq_idx]->ltd_exp,
 940                                       &req->rq_oi, max_age, rqset);
 941                 if (rc < 0)
 942                         GOTO(out_set, rc);
 943         }
 944
 945         rc = ptlrpc_set_wait(env, rqset);
 946
 947 out_set:
 948         if (rc < 0)
 949                 atomic_set(&set->set_completes, 0);
 950
 951         rc2 = lov_fini_statfs_set(set);
 952         if (rc == 0)
 953                 rc = rc2;
 954
 955 out_rqset:
 956         ptlrpc_set_destroy(rqset);
 957
 958         RETURN(rc);
 959 }
 960
 961 static int lov_iocontrol(unsigned int cmd, struct obd_export *exp, int len,
 962                          void *karg, void __user *uarg)
 963 {
 964         struct obd_device *obd = class_exp2obd(exp);
 965         struct lov_obd *lov = &obd->u.lov;
 966         int i = 0, rc = 0, count = lov->desc.ld_tgt_count;
 967         struct obd_uuid *uuidp;
 968
 969         ENTRY;
 970         switch (cmd) {
 971         case IOC_OBD_STATFS: {
 972                 struct obd_ioctl_data *data = karg;
 973                 struct obd_device *osc_obd;
 974                 struct obd_statfs stat_buf = {0};
 975                 struct obd_import *imp;
 976                 __u32 index;
 977                 __u32 flags;
 978
 979                 memcpy(&index, data->ioc_inlbuf2, sizeof(index));
 980                 if (index >= count)
 981                         RETURN(-ENODEV);
 982
 983                 if (!lov->lov_tgts[index])
 984                         /* Try again with the next index */
 985                         RETURN(-EAGAIN);
 986
 987                 osc_obd = class_exp2obd(lov->lov_tgts[index]->ltd_exp);
 988                 if (!osc_obd)
 989                         RETURN(-EINVAL);
 990
 991                 imp = osc_obd->u.cli.cl_import;
 992                 if (!lov->lov_tgts[index]->ltd_active &&
 993                     imp->imp_state != LUSTRE_IMP_IDLE)
 994                         RETURN(-ENODATA);
 995
 996                 /* copy UUID */
 997                 if (copy_to_user(data->ioc_pbuf2, obd2cli_tgt(osc_obd),
 998                                  min_t(unsigned long, data->ioc_plen2,
 999                                        sizeof(struct obd_uuid))))
1000                         RETURN(-EFAULT);
1001
1002                 memcpy(&flags, data->ioc_inlbuf1, sizeof(flags));
1003                 flags = flags & LL_STATFS_NODELAY ? OBD_STATFS_NODELAY : 0;
1004
1005                 /* got statfs data */
1006                 rc = obd_statfs(NULL, lov->lov_tgts[index]->ltd_exp, &stat_buf,
1007                                 ktime_get_seconds() - OBD_STATFS_CACHE_SECONDS,
1008                                 flags);
1009                 if (rc)
1010                         RETURN(rc);
1011                 if (copy_to_user(data->ioc_pbuf1, &stat_buf,
1012                                  min_t(unsigned long, data->ioc_plen1,
1013                                        sizeof(struct obd_statfs))))
1014                         RETURN(-EFAULT);
1015                 break;
1016         }
1017         case OBD_IOC_LOV_GET_CONFIG: {
1018                 struct obd_ioctl_data *data;
1019                 struct lov_desc *desc;
1020                 char *buf = NULL;
1021                 __u32 *genp;
1022
1023                 len = 0;
1024                 if (obd_ioctl_getdata(&buf, &len, uarg))
1025                         RETURN(-EINVAL);
1026
1027                 data = (struct obd_ioctl_data *)buf;
1028
1029                 if (sizeof(*desc) > data->ioc_inllen1) {
1030                         OBD_FREE_LARGE(buf, len);
1031                         RETURN(-EINVAL);
1032                 }
1033
1034                 if (sizeof(uuidp->uuid) * count > data->ioc_inllen2) {
1035                         OBD_FREE_LARGE(buf, len);
1036                         RETURN(-EINVAL);
1037                 }
1038
1039                 if (sizeof(__u32) * count > data->ioc_inllen3) {
1040                         OBD_FREE_LARGE(buf, len);
1041                         RETURN(-EINVAL);
1042                 }
1043
1044                 desc = (struct lov_desc *)data->ioc_inlbuf1;
1045                 memcpy(desc, &(lov->desc), sizeof(*desc));
1046
1047                 uuidp = (struct obd_uuid *)data->ioc_inlbuf2;
1048                 genp = (__u32 *)data->ioc_inlbuf3;
1049                 /* the uuid will be empty for deleted OSTs */
1050                 for (i = 0; i < count; i++, uuidp++, genp++) {
1051                         if (!lov->lov_tgts[i])
1052                                 continue;
1053                         *uuidp = lov->lov_tgts[i]->ltd_uuid;
1054                         *genp = lov->lov_tgts[i]->ltd_gen;
1055                 }
1056
1057                 if (copy_to_user(uarg, buf, len))
1058                         rc = -EFAULT;
1059                 OBD_FREE_LARGE(buf, len);
1060                 break;
1061         }
1062         case OBD_IOC_QUOTACTL: {
1063                 struct if_quotactl *qctl = karg;
1064                 struct lov_tgt_desc *tgt = NULL;
1065                 struct obd_quotactl *oqctl;
1066
1067                 if (qctl->qc_valid == QC_OSTIDX) {
1068                         if (count <= qctl->qc_idx)
1069                                 RETURN(-EINVAL);
1070
1071                         tgt = lov->lov_tgts[qctl->qc_idx];
1072                         if (!tgt || !tgt->ltd_exp)
1073                                 RETURN(-EINVAL);
1074                 } else if (qctl->qc_valid == QC_UUID) {
1075                         for (i = 0; i < count; i++) {
1076                                 tgt = lov->lov_tgts[i];
1077                                 if (!tgt ||
1078                                     !obd_uuid_equals(&tgt->ltd_uuid,
1079                                                      &qctl->obd_uuid))
1080                                         continue;
1081
1082                                 if (tgt->ltd_exp == NULL)
1083                                         RETURN(-EINVAL);
1084
1085                                 break;
1086                         }
1087                 } else {
1088                         RETURN(-EINVAL);
1089                 }
1090
1091                 if (i >= count)
1092                         RETURN(-EAGAIN);
1093
1094                 LASSERT(tgt && tgt->ltd_exp);
1095                 OBD_ALLOC_PTR(oqctl);
1096                 if (!oqctl)
1097                         RETURN(-ENOMEM);
1098
1099                 QCTL_COPY(oqctl, qctl);
1100                 rc = obd_quotactl(tgt->ltd_exp, oqctl);
1101                 if (rc == 0) {
1102                         QCTL_COPY(qctl, oqctl);
1103                         qctl->qc_valid = QC_OSTIDX;
1104                         qctl->obd_uuid = tgt->ltd_uuid;
1105                 }
1106                 OBD_FREE_PTR(oqctl);
1107                 break;
1108         }
1109         default: {
1110                 int set = 0;
1111
1112                 if (count == 0)
1113                         RETURN(-ENOTTY);
1114
1115                 for (i = 0; i < count; i++) {
1116                         int err;
1117                         struct obd_device *osc_obd;
1118
1119                         /* OST was disconnected */
1120                         if (!lov->lov_tgts[i] || !lov->lov_tgts[i]->ltd_exp)
1121                                 continue;
1122
1123                         /* ll_umount_begin() sets force on lov, pass to osc */
1124                         osc_obd = class_exp2obd(lov->lov_tgts[i]->ltd_exp);
1125                         osc_obd->obd_force = obd->obd_force;
1126                         err = obd_iocontrol(cmd, lov->lov_tgts[i]->ltd_exp,
1127                                             len, karg, uarg);
1128                         if (err) {
1129                                 if (lov->lov_tgts[i]->ltd_active) {
1130                                         CDEBUG(err == -ENOTTY ?
1131                                                D_IOCTL : D_WARNING,
1132                                                "iocontrol OSC %s on OST "
1133                                                "idx %d cmd %x: err = %d\n",
1134                                                lov_uuid2str(lov, i),
1135                                                i, cmd, err);
1136                                         if (!rc)
1137                                                 rc = err;
1138                                 }
1139                         } else {
1140                                 set = 1;
1141                         }
1142                 }
1143                 if (!set && !rc)
1144                         rc = -EIO;
1145         }
1146         }
1147
1148         RETURN(rc);
1149 }
1150
1151 static int lov_get_info(const struct lu_env *env, struct obd_export *exp,
1152                         __u32 keylen, void *key, __u32 *vallen, void *val)
1153 {
1154         struct obd_device *obddev = class_exp2obd(exp);
1155         struct lov_obd *lov = &obddev->u.lov;
1156         struct lov_desc *ld = &lov->desc;
1157         int rc = 0;
1158         ENTRY;
1159
1160         if (vallen == NULL || val == NULL)
1161                 RETURN(-EFAULT);
1162
1163         lov_tgts_getref(obddev);
1164
1165         if (KEY_IS(KEY_MAX_EASIZE)) {
1166                 *((u32 *)val) = exp->exp_connect_data.ocd_max_easize;
1167         } else if (KEY_IS(KEY_DEFAULT_EASIZE)) {
1168                 u32 def_stripe_count = min_t(u32, ld->ld_default_stripe_count,
1169                                              LOV_MAX_STRIPE_COUNT);
1170
1171                 *((u32 *)val) = lov_mds_md_size(def_stripe_count, LOV_MAGIC_V3);
1172         } else if (KEY_IS(KEY_TGT_COUNT)) {
1173                 *((int *)val) = lov->desc.ld_tgt_count;
1174         } else {
1175                 rc = -EINVAL;
1176         }
1177
1178         lov_tgts_putref(obddev);
1179
1180         RETURN(rc);
1181 }
1182
1183 static int lov_set_info_async(const struct lu_env *env, struct obd_export *exp,
1184                               __u32 keylen, void *key,
1185                               __u32 vallen, void *val,
1186                               struct ptlrpc_request_set *set)
1187 {
1188         struct obd_device *obddev = class_exp2obd(exp);
1189         struct lov_obd *lov = &obddev->u.lov;
1190         struct lov_tgt_desc *tgt;
1191         bool do_inactive = false, no_set = false;
1192         u32 i;
1193         int rc = 0;
1194         int err;
1195
1196         ENTRY;
1197
1198         if (set == NULL) {
1199                 no_set = true;
1200                 set = ptlrpc_prep_set();
1201                 if (!set)
1202                         RETURN(-ENOMEM);
1203         }
1204
1205         lov_tgts_getref(obddev);
1206
1207         if (KEY_IS(KEY_CHECKSUM))
1208                 do_inactive = true;
1209
1210         for (i = 0; i < lov->desc.ld_tgt_count; i++) {
1211                 tgt = lov->lov_tgts[i];
1212
1213                 /* OST was disconnected */
1214                 if (tgt == NULL || tgt->ltd_exp == NULL)
1215                         continue;
1216
1217                 /* OST is inactive and we don't want inactive OSCs */
1218                 if (!tgt->ltd_active && !do_inactive)
1219                         continue;
1220
1221                 err = obd_set_info_async(env, tgt->ltd_exp, keylen, key,
1222                                          vallen, val, set);
1223
1224                 if (rc == 0)
1225                         rc = err;
1226         }
1227
1228         /* cycle through MDC target for Data-on-MDT */
1229         for (i = 0; i < LOV_MDC_TGT_MAX; i++) {
1230                 struct obd_device *mdc;
1231
1232                 mdc = lov->lov_mdc_tgts[i].lmtd_mdc;
1233                 if (mdc == NULL)
1234                         continue;
1235
1236                 err = obd_set_info_async(env, mdc->obd_self_export,
1237                                          keylen, key, vallen, val, set);
1238                 if (rc == 0)
1239                         rc = err;
1240         }
1241
1242         lov_tgts_putref(obddev);
1243         if (no_set) {
1244                 err = ptlrpc_set_wait(env, set);
1245                 if (rc == 0)
1246                         rc = err;
1247                 ptlrpc_set_destroy(set);
1248         }
1249         RETURN(rc);
1250 }
1251
1252 void lov_stripe_lock(struct lov_stripe_md *md)
1253 __acquires(&md->lsm_lock)
1254 {
1255         LASSERT(md->lsm_lock_owner != current_pid());
1256         spin_lock(&md->lsm_lock);
1257         LASSERT(md->lsm_lock_owner == 0);
1258         md->lsm_lock_owner = current_pid();
1259 }
1260
1261 void lov_stripe_unlock(struct lov_stripe_md *md)
1262 __releases(&md->lsm_lock)
1263 {
1264         LASSERT(md->lsm_lock_owner == current_pid());
1265         md->lsm_lock_owner = 0;
1266         spin_unlock(&md->lsm_lock);
1267 }
1268
1269 static int lov_quotactl(struct obd_device *obd, struct obd_export *exp,
1270                         struct obd_quotactl *oqctl)
1271 {
1272         struct lov_obd      *lov = &obd->u.lov;
1273         struct lov_tgt_desc *tgt;
1274         __u64                curspace = 0;
1275         __u64                bhardlimit = 0;
1276         int                  i, rc = 0;
1277         ENTRY;
1278
1279         if (oqctl->qc_cmd != Q_GETOQUOTA &&
1280             oqctl->qc_cmd != LUSTRE_Q_SETQUOTA) {
1281                 CERROR("%s: bad quota opc %x for lov obd\n",
1282                        obd->obd_name, oqctl->qc_cmd);
1283                 RETURN(-EFAULT);
1284         }
1285
1286         /* for lov tgt */
1287         lov_tgts_getref(obd);
1288         for (i = 0; i < lov->desc.ld_tgt_count; i++) {
1289                 int err;
1290
1291                 tgt = lov->lov_tgts[i];
1292
1293                 if (!tgt)
1294                         continue;
1295
1296                 if (!tgt->ltd_active || tgt->ltd_reap) {
1297                         if (oqctl->qc_cmd == Q_GETOQUOTA &&
1298                             lov->lov_tgts[i]->ltd_activate) {
1299                                 rc = -ENETDOWN;
1300                                 CERROR("ost %d is inactive\n", i);
1301                         } else {
1302                                 CDEBUG(D_HA, "ost %d is inactive\n", i);
1303                         }
1304                         continue;
1305                 }
1306
1307                 err = obd_quotactl(tgt->ltd_exp, oqctl);
1308                 if (err) {
1309                         if (tgt->ltd_active && !rc)
1310                                 rc = err;
1311                         continue;
1312                 }
1313
1314                 if (oqctl->qc_cmd == Q_GETOQUOTA) {
1315                         curspace += oqctl->qc_dqblk.dqb_curspace;
1316                         bhardlimit += oqctl->qc_dqblk.dqb_bhardlimit;
1317                 }
1318         }
1319         lov_tgts_putref(obd);
1320
1321         if (oqctl->qc_cmd == Q_GETOQUOTA) {
1322                 oqctl->qc_dqblk.dqb_curspace = curspace;
1323                 oqctl->qc_dqblk.dqb_bhardlimit = bhardlimit;
1324         }
1325         RETURN(rc);
1326 }
1327
1328 static struct obd_ops lov_obd_ops = {
1329         .o_owner                = THIS_MODULE,
1330         .o_setup                = lov_setup,
1331         .o_cleanup              = lov_cleanup,
1332         .o_connect              = lov_connect,
1333         .o_disconnect           = lov_disconnect,
1334         .o_statfs               = lov_statfs,
1335         .o_iocontrol            = lov_iocontrol,
1336         .o_get_info             = lov_get_info,
1337         .o_set_info_async       = lov_set_info_async,
1338         .o_notify               = lov_notify,
1339         .o_pool_new             = lov_pool_new,
1340         .o_pool_rem             = lov_pool_remove,
1341         .o_pool_add             = lov_pool_add,
1342         .o_pool_del             = lov_pool_del,
1343         .o_quotactl             = lov_quotactl,
1344 };
1345
1346 struct kmem_cache *lov_oinfo_slab;
1347
1348 static int __init lov_init(void)
1349 {
1350         bool enable_proc = true;
1351         struct obd_type *type;
1352         int rc;
1353         ENTRY;
1354
1355         /* print an address of _any_ initialized kernel symbol from this
1356          * module, to allow debugging with gdb that doesn't support data
1357          * symbols from modules.*/
1358         CDEBUG(D_INFO, "Lustre LOV module (%p).\n", &lov_caches);
1359
1360         rc = lu_kmem_init(lov_caches);
1361         if (rc)
1362                 return rc;
1363
1364         lov_oinfo_slab = kmem_cache_create("lov_oinfo",
1365                                            sizeof(struct lov_oinfo), 0,
1366                                            SLAB_HWCACHE_ALIGN, NULL);
1367         if (lov_oinfo_slab == NULL) {
1368                 lu_kmem_fini(lov_caches);
1369                 return -ENOMEM;
1370         }
1371
1372         type = class_search_type(LUSTRE_LOD_NAME);
1373         if (type != NULL && type->typ_procsym != NULL)
1374                 enable_proc = false;
1375
1376         rc = class_register_type(&lov_obd_ops, NULL, enable_proc, NULL,
1377                                  LUSTRE_LOV_NAME, &lov_device_type);
1378
1379         if (rc) {
1380                 kmem_cache_destroy(lov_oinfo_slab);
1381                 lu_kmem_fini(lov_caches);
1382         }
1383
1384         RETURN(rc);
1385 }
1386
1387 static void __exit lov_exit(void)
1388 {
1389         class_unregister_type(LUSTRE_LOV_NAME);
1390         kmem_cache_destroy(lov_oinfo_slab);
1391         lu_kmem_fini(lov_caches);
1392 }
1393
1394 MODULE_AUTHOR("OpenSFS, Inc. <http://www.lustre.org/>");
1395 MODULE_DESCRIPTION("Lustre Logical Object Volume");
1396 MODULE_VERSION(LUSTRE_VERSION_STRING);
1397 MODULE_LICENSE("GPL");
1398
1399 module_init(lov_init);
1400 module_exit(lov_exit);