lustre/lov/lov_obd.c

   1 /*
   2  * GPL HEADER START
   3  *
   4  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License version 2 only,
   8  * as published by the Free Software Foundation.
   9  *
  10  * This program is distributed in the hope that it will be useful, but
  11  * WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13  * General Public License version 2 for more details (a copy is included
  14  * in the LICENSE file that accompanied this code).
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * version 2 along with this program; If not, see
  18  * http://www.gnu.org/licenses/gpl-2.0.html
  19  *
  20  * GPL HEADER END
  21  */
  22 /*
  23  * Copyright (c) 2002, 2010, Oracle and/or its affiliates. All rights reserved.
  24  * Use is subject to license terms.
  25  *
  26  * Copyright (c) 2011, 2017, Intel Corporation.
  27  */
  28 /*
  29  * This file is part of Lustre, http://www.lustre.org/
  30  *
  31  * lustre/lov/lov_obd.c
  32  *
  33  * Author: Phil Schwan <phil@clusterfs.com>
  34  * Author: Peter Braam <braam@clusterfs.com>
  35  * Author: Mike Shaver <shaver@clusterfs.com>
  36  * Author: Nathan Rutman <nathan@clusterfs.com>
  37  */
  38
  39 #define DEBUG_SUBSYSTEM S_LOV
  40 #include <libcfs/libcfs.h>
  41
  42 #include <cl_object.h>
  43 #include <lustre_dlm.h>
  44 #include <lustre_fid.h>
  45 #include <uapi/linux/lustre/lustre_ioctl.h>
  46 #include <lustre_ioctl_old.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                         lu_tgt_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_notify(struct obd_device *obd, struct obd_device *watched,
 111                       enum obd_notify_event ev);
 112
 113 int lov_connect_osc(struct obd_device *obd, u32 index, int activate,
 114                     struct obd_connect_data *data)
 115 {
 116         struct lov_obd *lov = &obd->u.lov;
 117         struct obd_uuid *tgt_uuid;
 118         struct obd_device *tgt_obd;
 119         static struct obd_uuid lov_osc_uuid = { "LOV_OSC_UUID" };
 120         struct obd_import *imp;
 121         int rc;
 122         ENTRY;
 123
 124         if (lov->lov_tgts[index] == NULL)
 125                 RETURN(-EINVAL);
 126
 127         tgt_uuid = &lov->lov_tgts[index]->ltd_uuid;
 128         tgt_obd = lov->lov_tgts[index]->ltd_obd;
 129
 130         if (!tgt_obd->obd_set_up) {
 131                 rc = -EINVAL;
 132                 CERROR("%s: target not set up: rc = %d\n",
 133                        obd_uuid2str(tgt_uuid), rc);
 134                 RETURN(rc);
 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("%s: target register_observer error: rc = %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("%s: target connect error: rc = %d\n",
 172                        obd_uuid2str(tgt_uuid), rc);
 173                 obd_register_observer(tgt_obd, NULL);
 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", obd->obd_name,
 269                osc_obd ? osc_obd->obd_name : "<no obd>");
 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
 291         obd_register_observer(osc_obd, NULL);
 292
 293         rc = obd_disconnect(tgt->ltd_exp);
 294         if (rc) {
 295                 CERROR("Target %s disconnect error %d\n",
 296                        tgt->ltd_uuid.uuid, rc);
 297                 rc = 0;
 298         }
 299
 300         tgt->ltd_exp = NULL;
 301         RETURN(0);
 302 }
 303
 304 static int lov_disconnect(struct obd_export *exp)
 305 {
 306         struct obd_device *obd = class_exp2obd(exp);
 307         struct lov_obd *lov = &obd->u.lov;
 308         u32 index;
 309         int rc;
 310
 311         ENTRY;
 312         if (!lov->lov_tgts)
 313                 goto out;
 314
 315         /* Only disconnect the underlying layers on the final disconnect. */
 316         if (lov->lov_connects == 0) {
 317                 CWARN("%s: was disconnected already #%d\n",
 318                       obd->obd_name, lov->lov_connects);
 319                 RETURN(0);
 320         }
 321
 322         lov->lov_connects--;
 323         if (lov->lov_connects > 0) {
 324                 /* why should there be more than 1 connect? */
 325                 CWARN("%s: unexpected disconnect #%d\n",
 326                       obd->obd_name, lov->lov_connects);
 327                 goto out;
 328         }
 329
 330         /* hold another ref so lov_del_obd() doesn't spin in putref each time */
 331         lov_tgts_getref(obd);
 332
 333         for (index = 0; index < lov->desc.ld_tgt_count; index++) {
 334                 if (lov->lov_tgts[index] && lov->lov_tgts[index]->ltd_exp) {
 335                         /* Disconnection is the last we know about an OBD */
 336                         lov_del_target(obd, index, NULL,
 337                                        lov->lov_tgts[index]->ltd_gen);
 338                 }
 339         }
 340         lov_tgts_putref(obd);
 341
 342 out:
 343         rc = class_disconnect(exp); /* bz 9811 */
 344         RETURN(rc);
 345 }
 346
 347 /* Error codes:
 348  *
 349  *  -EINVAL  : UUID can't be found in the LOV's target list
 350  *  -ENOTCONN: The UUID is found, but the target connection is bad (!)
 351  *  -EBADF   : The UUID is found, but the OBD is the wrong type (!)
 352  *  any >= 0 : is log target index
 353  */
 354 static int lov_set_osc_active(struct obd_device *obd, struct obd_uuid *uuid,
 355                               enum obd_notify_event ev)
 356 {
 357         struct lov_obd *lov = &obd->u.lov;
 358         struct lov_tgt_desc *tgt;
 359         int index;
 360         bool activate, active;
 361         ENTRY;
 362
 363         CDEBUG(D_INFO, "Searching in lov %p for uuid %s event(%d)\n",
 364                lov, uuid->uuid, ev);
 365
 366         lov_tgts_getref(obd);
 367         for (index = 0; index < lov->desc.ld_tgt_count; index++) {
 368                 tgt = lov->lov_tgts[index];
 369                 if (tgt && obd_uuid_equals(uuid, &tgt->ltd_uuid))
 370                         break;
 371         }
 372
 373         if (index == lov->desc.ld_tgt_count)
 374                 GOTO(out, index = -EINVAL);
 375
 376         if (ev == OBD_NOTIFY_DEACTIVATE || ev == OBD_NOTIFY_ACTIVATE) {
 377                 activate = (ev == OBD_NOTIFY_ACTIVATE);
 378
 379                 /*
 380                  * LU-642, initially inactive OSC could miss the obd_connect,
 381                  * we make up for it here.
 382                  */
 383                 if (activate && !tgt->ltd_exp) {
 384                         int rc;
 385                         struct obd_uuid lov_osc_uuid = {"LOV_OSC_UUID"};
 386
 387                         rc = obd_connect(NULL, &tgt->ltd_exp, tgt->ltd_obd,
 388                                          &lov_osc_uuid, &lov->lov_ocd,
 389                                          lov->lov_cache);
 390                         if (rc || !tgt->ltd_exp)
 391                                 GOTO(out, index = rc);
 392                 }
 393
 394                 if (lov->lov_tgts[index]->ltd_activate == activate) {
 395                         CDEBUG(D_INFO, "OSC %s already %sactivate!\n",
 396                                uuid->uuid, activate ? "" : "de");
 397                 } else {
 398                         lov->lov_tgts[index]->ltd_activate = activate;
 399                         CDEBUG(D_CONFIG, "%sactivate OSC %s\n",
 400                                activate ? "" : "de", obd_uuid2str(uuid));
 401                 }
 402         } else if (ev == OBD_NOTIFY_INACTIVE || ev == OBD_NOTIFY_ACTIVE) {
 403                 active = (ev == OBD_NOTIFY_ACTIVE);
 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                 }
 410                 CDEBUG(D_CONFIG, "Marking OSC %s %sactive\n",
 411                        obd_uuid2str(uuid), active ? "" : "in");
 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 = lu_tgt_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 = lu_tgt_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 pool_desc *pool, *tmp;
 787         ENTRY;
 788
 789         if (lov->lov_tgts_kobj) {
 790                 kobject_put(lov->lov_tgts_kobj);
 791                 lov->lov_tgts_kobj = NULL;
 792         }
 793
 794         list_for_each_entry_safe(pool, tmp, &lov->lov_pool_list, pool_list) {
 795                 /* free pool structs */
 796                 CDEBUG(D_INFO, "delete pool %p\n", pool);
 797                 /* In the function below, .hs_keycmp resolves to
 798                  * pool_hashkey_keycmp() */
 799                 /* coverity[overrun-buffer-val] */
 800                 lov_pool_del(obd, pool->pool_name);
 801         }
 802         lov_pool_hash_destroy(&lov->lov_pools_hash_body);
 803         lu_tgt_pool_free(&lov->lov_packed);
 804
 805         lprocfs_obd_cleanup(obd);
 806         if (lov->lov_tgts) {
 807                 int i;
 808                 lov_tgts_getref(obd);
 809                 for (i = 0; i < lov->desc.ld_tgt_count; i++) {
 810                         if (!lov->lov_tgts[i])
 811                                 continue;
 812
 813                         /* Inactive targets may never have connected */
 814                         if (lov->lov_tgts[i]->ltd_active)
 815                                 /* We should never get here - these
 816                                  * should have been removed in the
 817                                  * disconnect. */
 818                                 CERROR("%s: lov tgt %d not cleaned! "
 819                                        "deathrow=%d, lovrc=%d\n",
 820                                        obd->obd_name, i, lov->lov_death_row,
 821                                        atomic_read(&lov->lov_refcount));
 822                         lov_del_target(obd, i, NULL, 0);
 823                 }
 824                 lov_tgts_putref(obd);
 825                 OBD_FREE_PTR_ARRAY(lov->lov_tgts, lov->lov_tgt_size);
 826                 lov->lov_tgt_size = 0;
 827         }
 828
 829         if (lov->lov_cache != NULL) {
 830                 cl_cache_decref(lov->lov_cache);
 831                 lov->lov_cache = NULL;
 832         }
 833
 834         RETURN(0);
 835 }
 836
 837 int lov_process_config_base(struct obd_device *obd, struct lustre_cfg *lcfg,
 838                             u32 *indexp, int *genp)
 839 {
 840         struct obd_uuid obd_uuid;
 841         int cmd;
 842         int rc = 0;
 843
 844         ENTRY;
 845         switch (cmd = lcfg->lcfg_command) {
 846         case LCFG_ADD_MDC:
 847         case LCFG_DEL_MDC:
 848                 break;
 849         case LCFG_LOV_ADD_OBD:
 850         case LCFG_LOV_ADD_INA:
 851         case LCFG_LOV_DEL_OBD: {
 852                 u32 index;
 853                 int gen;
 854
 855                 /* lov_modify_tgts add  0:lov_mdsA  1:ost1_UUID  2:0  3:1 */
 856                 if (LUSTRE_CFG_BUFLEN(lcfg, 1) > sizeof(obd_uuid.uuid))
 857                         GOTO(out, rc = -EINVAL);
 858
 859                 obd_str2uuid(&obd_uuid,  lustre_cfg_buf(lcfg, 1));
 860
 861                 rc = kstrtou32(lustre_cfg_buf(lcfg, 2), 10, indexp);
 862                 if (rc)
 863                         GOTO(out, rc);
 864                 rc = kstrtoint(lustre_cfg_buf(lcfg, 3), 10, genp);
 865                 if (rc)
 866                         GOTO(out, rc);
 867                 index = *indexp;
 868                 gen = *genp;
 869                 if (cmd == LCFG_LOV_ADD_OBD)
 870                         rc = lov_add_target(obd, &obd_uuid, index, gen, 1);
 871                 else if (cmd == LCFG_LOV_ADD_INA)
 872                         rc = lov_add_target(obd, &obd_uuid, index, gen, 0);
 873                 else
 874                         rc = lov_del_target(obd, index, &obd_uuid, gen);
 875
 876                 GOTO(out, rc);
 877         }
 878         case LCFG_PARAM: {
 879                 struct lov_desc *desc = &(obd->u.lov.desc);
 880                 ssize_t count;
 881
 882                 if (!desc)
 883                         GOTO(out, rc = -EINVAL);
 884
 885                 count = class_modify_config(lcfg, PARAM_LOV,
 886                                             &obd->obd_kset.kobj);
 887                 GOTO(out, rc = count < 0 ? count : 0);
 888         }
 889         case LCFG_POOL_NEW:
 890         case LCFG_POOL_ADD:
 891         case LCFG_POOL_DEL:
 892         case LCFG_POOL_REM:
 893                 GOTO(out, rc);
 894
 895         default: {
 896                 CERROR("Unknown command: %d\n", lcfg->lcfg_command);
 897                 GOTO(out, rc = -EINVAL);
 898
 899         }
 900         }
 901 out:
 902         RETURN(rc);
 903 }
 904
 905 static int lov_statfs(const struct lu_env *env, struct obd_export *exp,
 906                       struct obd_statfs *osfs, time64_t max_age, __u32 flags)
 907 {
 908         struct obd_device *obd = class_exp2obd(exp);
 909         struct lov_obd *lov = &obd->u.lov;
 910         struct obd_info oinfo = {
 911                 .oi_osfs = osfs,
 912                 .oi_flags = flags,
 913         };
 914         struct ptlrpc_request_set *rqset;
 915         struct lov_request_set *set = NULL;
 916         struct lov_request *req;
 917         int rc = 0;
 918         int rc2;
 919
 920         ENTRY;
 921
 922         rqset = ptlrpc_prep_set();
 923         if (rqset == NULL)
 924                 RETURN(-ENOMEM);
 925
 926         rc = lov_prep_statfs_set(obd, &oinfo, &set);
 927         if (rc < 0)
 928                 GOTO(out_rqset, rc);
 929
 930         list_for_each_entry(req, &set->set_list, rq_link) {
 931                 rc = obd_statfs_async(lov->lov_tgts[req->rq_idx]->ltd_exp,
 932                                       &req->rq_oi, max_age, rqset);
 933                 if (rc < 0)
 934                         GOTO(out_set, rc);
 935         }
 936
 937         rc = ptlrpc_set_wait(env, rqset);
 938
 939 out_set:
 940         if (rc < 0)
 941                 atomic_set(&set->set_completes, 0);
 942
 943         rc2 = lov_fini_statfs_set(set);
 944         if (rc == 0)
 945                 rc = rc2;
 946
 947 out_rqset:
 948         ptlrpc_set_destroy(rqset);
 949
 950         RETURN(rc);
 951 }
 952
 953 static int lov_iocontrol(unsigned int cmd, struct obd_export *exp, int len,
 954                          void *karg, void __user *uarg)
 955 {
 956         struct obd_device *obd = class_exp2obd(exp);
 957         struct lov_obd *lov = &obd->u.lov;
 958         int i = 0, rc = 0, count = lov->desc.ld_tgt_count;
 959
 960         ENTRY;
 961         CDEBUG(D_IOCTL, "%s: cmd=%x len=%u karg=%pK uarg=%pK\n",
 962                exp->exp_obd->obd_name, cmd, len, karg, uarg);
 963
 964         /* exit early for unknown ioctl types. */
 965         if (unlikely(_IOC_TYPE(cmd) != 'f' && !IOC_OSC_SET_ACTIVE_ALLOW(cmd)))
 966                 RETURN(OBD_IOC_DEBUG(D_IOCTL, obd->obd_name, cmd, "unknown",
 967                                      -ENOTTY));
 968
 969         /* can't do a generic karg == NULL check here, since it is too noisy and
 970          * we need to return -ENOTTY for unsupported ioctls instead of -EINVAL.
 971          */
 972         switch (cmd) {
 973         case IOC_OBD_STATFS: {
 974                 struct obd_ioctl_data *data;
 975                 struct obd_device *osc_obd;
 976                 struct obd_statfs stat_buf = {0};
 977                 struct obd_import *imp;
 978                 __u32 index;
 979                 __u32 flags;
 980
 981                 if (unlikely(karg == NULL))
 982                         RETURN(OBD_IOC_ERROR(obd->obd_name, cmd, "karg=null",
 983                                              -EINVAL));
 984                 data = karg;
 985
 986                 memcpy(&index, data->ioc_inlbuf2, sizeof(index));
 987                 if (index >= count)
 988                         RETURN(-ENODEV);
 989
 990                 if (!lov->lov_tgts[index])
 991                         /* Try again with the next index */
 992                         RETURN(-EAGAIN);
 993
 994                 osc_obd = class_exp2obd(lov->lov_tgts[index]->ltd_exp);
 995                 if (!osc_obd)
 996                         RETURN(-EINVAL);
 997
 998                 imp = osc_obd->u.cli.cl_import;
 999                 if (!lov->lov_tgts[index]->ltd_active &&
1000                     imp->imp_state != LUSTRE_IMP_IDLE)
1001                         RETURN(-ENODATA);
1002
1003                 /* copy UUID */
1004                 if (copy_to_user(data->ioc_pbuf2, obd2cli_tgt(osc_obd),
1005                                  min_t(unsigned long, data->ioc_plen2,
1006                                        sizeof(struct obd_uuid))))
1007                         RETURN(-EFAULT);
1008
1009                 memcpy(&flags, data->ioc_inlbuf1, sizeof(flags));
1010                 flags = flags & LL_STATFS_NODELAY ? OBD_STATFS_NODELAY : 0;
1011
1012                 /* got statfs data */
1013                 rc = obd_statfs(NULL, lov->lov_tgts[index]->ltd_exp, &stat_buf,
1014                                 ktime_get_seconds() - OBD_STATFS_CACHE_SECONDS,
1015                                 flags);
1016                 if (rc)
1017                         RETURN(rc);
1018                 if (copy_to_user(data->ioc_pbuf1, &stat_buf,
1019                                  min_t(unsigned long, data->ioc_plen1,
1020                                        sizeof(struct obd_statfs))))
1021                         RETURN(-EFAULT);
1022                 break;
1023         }
1024         case OBD_IOC_QUOTACTL: {
1025                 struct if_quotactl *qctl;
1026                 struct lov_tgt_desc *tgt = NULL;
1027                 struct obd_quotactl *oqctl;
1028                 struct obd_import *imp;
1029
1030                 if (unlikely(karg == NULL))
1031                         RETURN(OBD_IOC_ERROR(obd->obd_name, cmd, "karg=null",
1032                                              -EINVAL));
1033                 qctl = karg;
1034
1035                 if (qctl->qc_valid == QC_OSTIDX) {
1036                         if (count <= qctl->qc_idx)
1037                                 RETURN(-EINVAL);
1038
1039                         tgt = lov->lov_tgts[qctl->qc_idx];
1040                         if (!tgt)
1041                                 RETURN(-ENODEV);
1042
1043                         if (!tgt->ltd_exp)
1044                                 RETURN(-EINVAL);
1045                 } else if (qctl->qc_valid == QC_UUID) {
1046                         for (i = 0; i < count; i++) {
1047                                 tgt = lov->lov_tgts[i];
1048                                 if (!tgt ||
1049                                     !obd_uuid_equals(&tgt->ltd_uuid,
1050                                                      &qctl->obd_uuid))
1051                                         continue;
1052
1053                                 if (tgt->ltd_exp == NULL)
1054                                         RETURN(-EINVAL);
1055
1056                                 break;
1057                         }
1058                 } else {
1059                         RETURN(-EINVAL);
1060                 }
1061
1062                 if (i >= count)
1063                         RETURN(-EAGAIN);
1064
1065                 LASSERT(tgt && tgt->ltd_exp);
1066                 imp = class_exp2cliimp(tgt->ltd_exp);
1067                 if (!tgt->ltd_active && imp->imp_state != LUSTRE_IMP_IDLE) {
1068                         qctl->qc_valid = QC_OSTIDX;
1069                         qctl->obd_uuid = tgt->ltd_uuid;
1070                         RETURN(-ENODATA);
1071                 }
1072
1073                 OBD_ALLOC_PTR(oqctl);
1074                 if (!oqctl)
1075                         RETURN(-ENOMEM);
1076
1077                 QCTL_COPY(oqctl, qctl);
1078                 rc = obd_quotactl(tgt->ltd_exp, oqctl);
1079                 if (rc == 0) {
1080                         QCTL_COPY(qctl, oqctl);
1081                         qctl->qc_valid = QC_OSTIDX;
1082                         qctl->obd_uuid = tgt->ltd_uuid;
1083                 }
1084                 OBD_FREE_PTR(oqctl);
1085                 break;
1086         }
1087         default: {
1088                 int set = 0;
1089
1090                 if (count == 0)
1091                         RETURN(-ENOTTY);
1092
1093                 for (i = 0; i < count; i++) {
1094                         int err;
1095                         struct obd_device *osc_obd;
1096
1097                         /* OST was disconnected */
1098                         if (!lov->lov_tgts[i] || !lov->lov_tgts[i]->ltd_exp)
1099                                 continue;
1100
1101                         /* ll_umount_begin() sets force on lov, pass to osc */
1102                         osc_obd = class_exp2obd(lov->lov_tgts[i]->ltd_exp);
1103                         if (osc_obd)
1104                                 osc_obd->obd_force = obd->obd_force;
1105                         err = obd_iocontrol(cmd, lov->lov_tgts[i]->ltd_exp,
1106                                             len, karg, uarg);
1107                         if (err) {
1108                                 if (lov->lov_tgts[i]->ltd_active) {
1109                                         OBD_IOC_DEBUG(err == -ENOTTY ?
1110                                                       D_IOCTL : D_WARNING,
1111                                                       obd->obd_name, cmd,
1112                                                       lov_uuid2str(lov, i),
1113                                                       err);
1114                                         if (!rc)
1115                                                 rc = err;
1116
1117                                         if (err == -ENOTTY)
1118                                                 break;
1119                                 }
1120                         } else {
1121                                 set = 1;
1122                         }
1123                 }
1124                 if (!set && !rc)
1125                         rc = -EIO;
1126                 break;
1127         }
1128         }
1129
1130         RETURN(rc);
1131 }
1132
1133 static int lov_get_info(const struct lu_env *env, struct obd_export *exp,
1134                         __u32 keylen, void *key, __u32 *vallen, void *val)
1135 {
1136         struct obd_device *obd = class_exp2obd(exp);
1137         struct lov_obd *lov = &obd->u.lov;
1138         struct lov_desc *ld = &lov->desc;
1139         int rc = 0;
1140         ENTRY;
1141
1142         if (vallen == NULL || val == NULL)
1143                 RETURN(-EFAULT);
1144
1145         lov_tgts_getref(obd);
1146
1147         if (KEY_IS(KEY_MAX_EASIZE)) {
1148                 *((u32 *)val) = exp->exp_connect_data.ocd_max_easize;
1149         } else if (KEY_IS(KEY_DEFAULT_EASIZE)) {
1150                 u32 def_stripe_count = min_t(u32, ld->ld_default_stripe_count,
1151                                              LOV_MAX_STRIPE_COUNT);
1152
1153                 *((u32 *)val) = lov_mds_md_size(def_stripe_count, LOV_MAGIC_V3);
1154         } else if (KEY_IS(KEY_TGT_COUNT)) {
1155                 *((int *)val) = lov->desc.ld_tgt_count;
1156         } else {
1157                 rc = -EINVAL;
1158         }
1159
1160         lov_tgts_putref(obd);
1161
1162         RETURN(rc);
1163 }
1164
1165 static int lov_set_info_async(const struct lu_env *env, struct obd_export *exp,
1166                               __u32 keylen, void *key,
1167                               __u32 vallen, void *val,
1168                               struct ptlrpc_request_set *set)
1169 {
1170         struct obd_device *obd = class_exp2obd(exp);
1171         struct lov_obd *lov = &obd->u.lov;
1172         struct lov_tgt_desc *tgt;
1173         bool do_inactive = false, no_set = false;
1174         u32 i;
1175         int rc = 0;
1176         int err;
1177
1178         ENTRY;
1179
1180         if (set == NULL) {
1181                 no_set = true;
1182                 set = ptlrpc_prep_set();
1183                 if (!set)
1184                         RETURN(-ENOMEM);
1185         }
1186
1187         lov_tgts_getref(obd);
1188
1189         if (KEY_IS(KEY_CHECKSUM))
1190                 do_inactive = true;
1191
1192         for (i = 0; i < lov->desc.ld_tgt_count; i++) {
1193                 tgt = lov->lov_tgts[i];
1194
1195                 /* OST was disconnected */
1196                 if (tgt == NULL || tgt->ltd_exp == NULL)
1197                         continue;
1198
1199                 /* OST is inactive and we don't want inactive OSCs */
1200                 if (!tgt->ltd_active && !do_inactive)
1201                         continue;
1202
1203                 err = obd_set_info_async(env, tgt->ltd_exp, keylen, key,
1204                                          vallen, val, set);
1205
1206                 if (rc == 0)
1207                         rc = err;
1208         }
1209
1210         /* cycle through MDC target for Data-on-MDT */
1211         for (i = 0; i < LOV_MDC_TGT_MAX; i++) {
1212                 struct obd_device *mdc;
1213
1214                 mdc = lov->lov_mdc_tgts[i].lmtd_mdc;
1215                 if (mdc == NULL)
1216                         continue;
1217
1218                 err = obd_set_info_async(env, mdc->obd_self_export,
1219                                          keylen, key, vallen, val, set);
1220                 if (rc == 0)
1221                         rc = err;
1222         }
1223
1224         lov_tgts_putref(obd);
1225         if (no_set) {
1226                 err = ptlrpc_set_wait(env, set);
1227                 if (rc == 0)
1228                         rc = err;
1229                 ptlrpc_set_destroy(set);
1230         }
1231         RETURN(rc);
1232 }
1233
1234 void lov_stripe_lock(struct lov_stripe_md *md)
1235 __acquires(&md->lsm_lock)
1236 {
1237         LASSERT(md->lsm_lock_owner != current->pid);
1238         spin_lock(&md->lsm_lock);
1239         LASSERT(md->lsm_lock_owner == 0);
1240         md->lsm_lock_owner = current->pid;
1241 }
1242
1243 void lov_stripe_unlock(struct lov_stripe_md *md)
1244 __releases(&md->lsm_lock)
1245 {
1246         LASSERT(md->lsm_lock_owner == current->pid);
1247         md->lsm_lock_owner = 0;
1248         spin_unlock(&md->lsm_lock);
1249 }
1250
1251 static int lov_quotactl(struct obd_device *obd, struct obd_export *exp,
1252                         struct obd_quotactl *oqctl)
1253 {
1254         struct lov_obd *lov = &obd->u.lov;
1255         struct lov_tgt_desc *tgt;
1256         struct pool_desc *pool = NULL;
1257         __u64 curspace = 0;
1258         __u64 bhardlimit = 0;
1259         int i, rc = 0;
1260
1261         ENTRY;
1262         if (oqctl->qc_cmd != Q_GETOQUOTA &&
1263             oqctl->qc_cmd != LUSTRE_Q_SETQUOTA &&
1264             oqctl->qc_cmd != LUSTRE_Q_GETQUOTAPOOL) {
1265                 rc = -EFAULT;
1266                 CERROR("%s: bad quota opc %x for lov obd: rc = %d\n",
1267                        obd->obd_name, oqctl->qc_cmd, rc);
1268                 RETURN(rc);
1269         }
1270
1271         if (oqctl->qc_cmd == LUSTRE_Q_GETQUOTAPOOL) {
1272                 pool = lov_pool_find(obd, oqctl->qc_poolname);
1273                 if (!pool)
1274                         RETURN(-ENOENT);
1275                 /* Set Q_GETOQUOTA back as targets report it's own
1276                  * usage and doesn't care about pools */
1277                 oqctl->qc_cmd = Q_GETOQUOTA;
1278         }
1279
1280         /* for lov tgt */
1281         lov_tgts_getref(obd);
1282         for (i = 0; i < lov->desc.ld_tgt_count; i++) {
1283                 int err;
1284
1285                 tgt = lov->lov_tgts[i];
1286
1287                 if (!tgt)
1288                         continue;
1289
1290                 if (pool &&
1291                     lu_tgt_check_index(tgt->ltd_index, &pool->pool_obds))
1292                         continue;
1293
1294                 if (!tgt->ltd_active || tgt->ltd_reap) {
1295                         if (oqctl->qc_cmd == Q_GETOQUOTA &&
1296                             lov->lov_tgts[i]->ltd_activate) {
1297                                 rc = -ENETDOWN;
1298                                 CERROR("%s: ost %d is inactive: rc = %d\n",
1299                                        obd->obd_name, i, rc);
1300                         } else {
1301                                 CDEBUG(D_HA, "ost %d is inactive\n", i);
1302                         }
1303                         continue;
1304                 }
1305
1306                 err = obd_quotactl(tgt->ltd_exp, oqctl);
1307                 if (err) {
1308                         if (tgt->ltd_active && !rc)
1309                                 rc = err;
1310                         continue;
1311                 }
1312
1313                 if (oqctl->qc_cmd == Q_GETOQUOTA) {
1314                         curspace += oqctl->qc_dqblk.dqb_curspace;
1315                         bhardlimit += oqctl->qc_dqblk.dqb_bhardlimit;
1316                 }
1317         }
1318         lov_tgts_putref(obd);
1319         if (pool)
1320                 lov_pool_putref(pool);
1321
1322         if (oqctl->qc_cmd == Q_GETOQUOTA) {
1323                 oqctl->qc_dqblk.dqb_curspace = curspace;
1324                 oqctl->qc_dqblk.dqb_bhardlimit = bhardlimit;
1325         }
1326         RETURN(rc);
1327 }
1328
1329 static const struct obd_ops lov_obd_ops = {
1330         .o_owner                = THIS_MODULE,
1331         .o_setup                = lov_setup,
1332         .o_cleanup              = lov_cleanup,
1333         .o_connect              = lov_connect,
1334         .o_disconnect           = lov_disconnect,
1335         .o_statfs               = lov_statfs,
1336         .o_iocontrol            = lov_iocontrol,
1337         .o_get_info             = lov_get_info,
1338         .o_set_info_async       = lov_set_info_async,
1339         .o_notify               = lov_notify,
1340         .o_pool_new             = lov_pool_new,
1341         .o_pool_rem             = lov_pool_remove,
1342         .o_pool_add             = lov_pool_add,
1343         .o_pool_del             = lov_pool_del,
1344         .o_quotactl             = lov_quotactl,
1345 };
1346
1347 struct kmem_cache *lov_oinfo_slab;
1348
1349 static int __init lov_init(void)
1350 {
1351         int rc;
1352         ENTRY;
1353
1354         /* print an address of _any_ initialized kernel symbol from this
1355          * module, to allow debugging with gdb that doesn't support data
1356          * symbols from modules.*/
1357         CDEBUG(D_INFO, "Lustre LOV module (%p).\n", &lov_caches);
1358
1359         rc = lu_kmem_init(lov_caches);
1360         if (rc)
1361                 return rc;
1362
1363         lov_oinfo_slab = kmem_cache_create("lov_oinfo",
1364                                            sizeof(struct lov_oinfo), 0,
1365                                            SLAB_HWCACHE_ALIGN, NULL);
1366         if (lov_oinfo_slab == NULL) {
1367                 lu_kmem_fini(lov_caches);
1368                 return -ENOMEM;
1369         }
1370
1371         rc = class_register_type(&lov_obd_ops, NULL, true,
1372                                  LUSTRE_LOV_NAME, &lov_device_type);
1373         if (rc) {
1374                 kmem_cache_destroy(lov_oinfo_slab);
1375                 lu_kmem_fini(lov_caches);
1376         }
1377
1378         RETURN(rc);
1379 }
1380
1381 static void __exit lov_exit(void)
1382 {
1383         class_unregister_type(LUSTRE_LOV_NAME);
1384         kmem_cache_destroy(lov_oinfo_slab);
1385         lu_kmem_fini(lov_caches);
1386 }
1387
1388 MODULE_AUTHOR("OpenSFS, Inc. <http://www.lustre.org/>");
1389 MODULE_DESCRIPTION("Lustre Logical Object Volume");
1390 MODULE_VERSION(LUSTRE_VERSION_STRING);
1391 MODULE_LICENSE("GPL");
1392
1393 module_init(lov_init);
1394 module_exit(lov_exit);