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