lustre/lov/lov_obd.c

   1 /*
   2  * GPL HEADER START
   3  *
   4  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License version 2 only,
   8  * as published by the Free Software Foundation.
   9  *
  10  * This program is distributed in the hope that it will be useful, but
  11  * WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13  * General Public License version 2 for more details (a copy is included
  14  * in the LICENSE file that accompanied this code).
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * version 2 along with this program; If not, see
  18  * http://www.gnu.org/licenses/gpl-2.0.html
  19  *
  20  * GPL HEADER END
  21  */
  22 /*
  23  * Copyright (c) 2002, 2010, Oracle and/or its affiliates. All rights reserved.
  24  * Use is subject to license terms.
  25  *
  26  * Copyright (c) 2011, 2017, Intel Corporation.
  27  */
  28 /*
  29  * This file is part of Lustre, http://www.lustre.org/
  30  *
  31  * lustre/lov/lov_obd.c
  32  *
  33  * Author: Phil Schwan <phil@clusterfs.com>
  34  * Author: Peter Braam <braam@clusterfs.com>
  35  * Author: Mike Shaver <shaver@clusterfs.com>
  36  * Author: Nathan Rutman <nathan@clusterfs.com>
  37  */
  38
  39 #define DEBUG_SUBSYSTEM S_LOV
  40 #include <libcfs/libcfs.h>
  41
  42 #include <cl_object.h>
  43 #include <lustre_dlm.h>
  44 #include <lustre_fid.h>
  45 #include <uapi/linux/lustre/lustre_ioctl.h>
  46 #include <lustre_lib.h>
  47 #include <lustre_mds.h>
  48 #include <lustre_net.h>
  49 #include <uapi/linux/lustre/lustre_param.h>
  50 #include <lustre_swab.h>
  51 #include <lprocfs_status.h>
  52 #include <obd_class.h>
  53 #include <obd_support.h>
  54
  55 #include "lov_internal.h"
  56
  57 /* Keep a refcount of lov->tgt usage to prevent racing with addition/deletion.
  58    Any function that expects lov_tgts to remain stationary must take a ref. */
  59 void lov_tgts_getref(struct obd_device *obd)
  60 {
  61         struct lov_obd *lov = &obd->u.lov;
  62
  63         /* nobody gets through here until lov_putref is done */
  64         mutex_lock(&lov->lov_lock);
  65         atomic_inc(&lov->lov_refcount);
  66         mutex_unlock(&lov->lov_lock);
  67 }
  68
  69 static void __lov_del_obd(struct obd_device *obd, struct lov_tgt_desc *tgt);
  70
  71 void lov_tgts_putref(struct obd_device *obd)
  72 {
  73         struct lov_obd *lov = &obd->u.lov;
  74
  75         mutex_lock(&lov->lov_lock);
  76         /* ok to dec to 0 more than once -- ltd_exp's will be null */
  77         if (atomic_dec_and_test(&lov->lov_refcount) && lov->lov_death_row) {
  78                 LIST_HEAD(kill);
  79                 struct lov_tgt_desc *tgt, *n;
  80                 int i;
  81
  82                 CDEBUG(D_CONFIG, "destroying %d lov targets\n",
  83                        lov->lov_death_row);
  84                 for (i = 0; i < lov->desc.ld_tgt_count; i++) {
  85                         tgt = lov->lov_tgts[i];
  86
  87                         if (!tgt || !tgt->ltd_reap)
  88                                 continue;
  89                         list_add(&tgt->ltd_kill, &kill);
  90                         /* XXX - right now there is a dependency on ld_tgt_count
  91                          * being the maximum tgt index for computing the
  92                          * mds_max_easize. So we can't shrink it. */
  93                         lu_tgt_pool_remove(&lov->lov_packed, i);
  94                         lov->lov_tgts[i] = NULL;
  95                         lov->lov_death_row--;
  96                 }
  97                 mutex_unlock(&lov->lov_lock);
  98
  99                 list_for_each_entry_safe(tgt, n, &kill, ltd_kill) {
 100                         list_del(&tgt->ltd_kill);
 101                         /* Disconnect */
 102                         __lov_del_obd(obd, tgt);
 103                 }
 104         } else {
 105                 mutex_unlock(&lov->lov_lock);
 106         }
 107 }
 108
 109 static int lov_notify(struct obd_device *obd, struct obd_device *watched,
 110                       enum obd_notify_event ev);
 111
 112 int lov_connect_osc(struct obd_device *obd, u32 index, int activate,
 113                     struct obd_connect_data *data)
 114 {
 115         struct lov_obd *lov = &obd->u.lov;
 116         struct obd_uuid *tgt_uuid;
 117         struct obd_device *tgt_obd;
 118         static struct obd_uuid lov_osc_uuid = { "LOV_OSC_UUID" };
 119         struct obd_import *imp;
 120         int rc;
 121         ENTRY;
 122
 123         if (lov->lov_tgts[index] == NULL)
 124                 RETURN(-EINVAL);
 125
 126         tgt_uuid = &lov->lov_tgts[index]->ltd_uuid;
 127         tgt_obd = lov->lov_tgts[index]->ltd_obd;
 128
 129         if (!tgt_obd->obd_set_up) {
 130                 CERROR("Target %s not set up\n", obd_uuid2str(tgt_uuid));
 131                 RETURN(-EINVAL);
 132         }
 133
 134         /* override the sp_me from lov */
 135         tgt_obd->u.cli.cl_sp_me = lov->lov_sp_me;
 136
 137         if (data && (data->ocd_connect_flags & OBD_CONNECT_INDEX))
 138                 data->ocd_index = index;
 139
 140         /*
 141          * Divine LOV knows that OBDs under it are OSCs.
 142          */
 143         imp = tgt_obd->u.cli.cl_import;
 144
 145         if (activate) {
 146                 tgt_obd->obd_no_recov = 0;
 147                 /* FIXME this is probably supposed to be
 148                    ptlrpc_set_import_active.  Horrible naming. */
 149                 ptlrpc_activate_import(imp, false);
 150         }
 151
 152         rc = obd_register_observer(tgt_obd, obd);
 153         if (rc) {
 154                 CERROR("Target %s register_observer error %d\n",
 155                        obd_uuid2str(tgt_uuid), rc);
 156                 RETURN(rc);
 157         }
 158
 159         if (imp->imp_invalid) {
 160                 CDEBUG(D_CONFIG, "%s: not connecting - administratively disabled\n",
 161                        obd_uuid2str(tgt_uuid));
 162                 RETURN(0);
 163         }
 164
 165         rc = obd_connect(NULL, &lov->lov_tgts[index]->ltd_exp, tgt_obd,
 166                          &lov_osc_uuid, data, lov->lov_cache);
 167         if (rc || !lov->lov_tgts[index]->ltd_exp) {
 168                 CERROR("Target %s connect error %d\n",
 169                        obd_uuid2str(tgt_uuid), rc);
 170                 RETURN(-ENODEV);
 171         }
 172
 173         lov->lov_tgts[index]->ltd_reap = 0;
 174
 175         CDEBUG(D_CONFIG, "Connected tgt idx %d %s (%s) %sactive\n", index,
 176                obd_uuid2str(tgt_uuid), tgt_obd->obd_name, activate ? "":"in");
 177
 178         if (lov->lov_tgts_kobj) {
 179                 /* Even if we failed, that's ok */
 180                 rc = sysfs_create_link(lov->lov_tgts_kobj,
 181                                        &tgt_obd->obd_kset.kobj,
 182                                        tgt_obd->obd_name);
 183                 if (rc) {
 184                         CERROR("%s: can't register LOV target /sys/fs/lustre/%s/%s/target_obds/%s : rc = %d\n",
 185                                obd->obd_name, obd->obd_type->typ_name,
 186                                obd->obd_name,
 187                                lov->lov_tgts[index]->ltd_exp->exp_obd->obd_name,
 188                                rc);
 189                 }
 190         }
 191         RETURN(0);
 192 }
 193
 194 static int lov_connect(const struct lu_env *env,
 195                        struct obd_export **exp, struct obd_device *obd,
 196                        struct obd_uuid *cluuid, struct obd_connect_data *data,
 197                        void *localdata)
 198 {
 199         struct lov_obd *lov = &obd->u.lov;
 200         struct lov_tgt_desc *tgt;
 201         struct lustre_handle conn;
 202         int i, rc;
 203         ENTRY;
 204
 205         CDEBUG(D_CONFIG, "connect #%d\n", lov->lov_connects);
 206
 207         rc = class_connect(&conn, obd, cluuid);
 208         if (rc)
 209                 RETURN(rc);
 210
 211         *exp = class_conn2export(&conn);
 212
 213         /* Why should there ever be more than 1 connect? */
 214         lov->lov_connects++;
 215         LASSERT(lov->lov_connects == 1);
 216
 217         memset(&lov->lov_ocd, 0, sizeof(lov->lov_ocd));
 218         if (data)
 219                 lov->lov_ocd = *data;
 220
 221         lov_tgts_getref(obd);
 222
 223         if (localdata) {
 224                 lov->lov_cache = localdata;
 225                 cl_cache_incref(lov->lov_cache);
 226         }
 227
 228         for (i = 0; i < lov->desc.ld_tgt_count; i++) {
 229                 tgt = lov->lov_tgts[i];
 230                 if (!tgt || obd_uuid_empty(&tgt->ltd_uuid))
 231                         continue;
 232                 /* Flags will be lowest common denominator */
 233                 rc = lov_connect_osc(obd, i, tgt->ltd_activate, &lov->lov_ocd);
 234                 if (rc) {
 235                         CERROR("%s: lov connect tgt %d failed: %d\n",
 236                                obd->obd_name, i, rc);
 237                         continue;
 238                 }
 239                 /* connect to administrative disabled ost */
 240                 if (!lov->lov_tgts[i]->ltd_exp)
 241                         continue;
 242
 243                 rc = lov_notify(obd, lov->lov_tgts[i]->ltd_exp->exp_obd,
 244                                 OBD_NOTIFY_CONNECT);
 245                 if (rc) {
 246                         CERROR("%s error sending notify %d\n",
 247                                obd->obd_name, rc);
 248                 }
 249         }
 250
 251         lov_tgts_putref(obd);
 252
 253         RETURN(0);
 254 }
 255
 256 static int lov_disconnect_obd(struct obd_device *obd, struct lov_tgt_desc *tgt)
 257 {
 258         struct lov_obd *lov = &obd->u.lov;
 259         struct obd_device *osc_obd;
 260         int rc;
 261         ENTRY;
 262
 263         osc_obd = class_exp2obd(tgt->ltd_exp);
 264         CDEBUG(D_CONFIG, "%s: disconnecting target %s\n", obd->obd_name,
 265                osc_obd ? osc_obd->obd_name : "<no obd>");
 266
 267         if (tgt->ltd_active) {
 268                 tgt->ltd_active = 0;
 269                 lov->desc.ld_active_tgt_count--;
 270                 tgt->ltd_exp->exp_obd->obd_inactive = 1;
 271         }
 272
 273         if (osc_obd) {
 274                 if (lov->lov_tgts_kobj)
 275                         sysfs_remove_link(lov->lov_tgts_kobj,
 276                                           osc_obd->obd_name);
 277
 278                 /* Pass it on to our clients.
 279                  * XXX This should be an argument to disconnect,
 280                  * XXX not a back-door flag on the OBD.  Ah well.
 281                  */
 282                 osc_obd->obd_force = obd->obd_force;
 283                 osc_obd->obd_fail = obd->obd_fail;
 284                 osc_obd->obd_no_recov = obd->obd_no_recov;
 285         }
 286
 287         obd_register_observer(osc_obd, NULL);
 288
 289         rc = obd_disconnect(tgt->ltd_exp);
 290         if (rc) {
 291                 CERROR("Target %s disconnect error %d\n",
 292                        tgt->ltd_uuid.uuid, rc);
 293                 rc = 0;
 294         }
 295
 296         tgt->ltd_exp = NULL;
 297         RETURN(0);
 298 }
 299
 300 static int lov_disconnect(struct obd_export *exp)
 301 {
 302         struct obd_device *obd = class_exp2obd(exp);
 303         struct lov_obd *lov = &obd->u.lov;
 304         u32 index;
 305         int rc;
 306
 307         ENTRY;
 308         if (!lov->lov_tgts)
 309                 goto out;
 310
 311         /* Only disconnect the underlying layers on the final disconnect. */
 312         if (lov->lov_connects == 0) {
 313                 CWARN("%s: was disconnected already #%d\n",
 314                       obd->obd_name, lov->lov_connects);
 315                 RETURN(0);
 316         }
 317
 318         lov->lov_connects--;
 319         if (lov->lov_connects > 0) {
 320                 /* why should there be more than 1 connect? */
 321                 CWARN("%s: unexpected disconnect #%d\n",
 322                       obd->obd_name, lov->lov_connects);
 323                 goto out;
 324         }
 325
 326         /* hold another ref so lov_del_obd() doesn't spin in putref each time */
 327         lov_tgts_getref(obd);
 328
 329         for (index = 0; index < lov->desc.ld_tgt_count; index++) {
 330                 if (lov->lov_tgts[index] && lov->lov_tgts[index]->ltd_exp) {
 331                         /* Disconnection is the last we know about an OBD */
 332                         lov_del_target(obd, index, NULL,
 333                                        lov->lov_tgts[index]->ltd_gen);
 334                 }
 335         }
 336         lov_tgts_putref(obd);
 337
 338 out:
 339         rc = class_disconnect(exp); /* bz 9811 */
 340         RETURN(rc);
 341 }
 342
 343 /* Error codes:
 344  *
 345  *  -EINVAL  : UUID can't be found in the LOV's target list
 346  *  -ENOTCONN: The UUID is found, but the target connection is bad (!)
 347  *  -EBADF   : The UUID is found, but the OBD is the wrong type (!)
 348  *  any >= 0 : is log target index
 349  */
 350 static int lov_set_osc_active(struct obd_device *obd, struct obd_uuid *uuid,
 351                               enum obd_notify_event ev)
 352 {
 353         struct lov_obd *lov = &obd->u.lov;
 354         struct lov_tgt_desc *tgt;
 355         int index;
 356         bool 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 && obd_uuid_equals(uuid, &tgt->ltd_uuid))
 366                         break;
 367         }
 368
 369         if (index == lov->desc.ld_tgt_count)
 370                 GOTO(out, index = -EINVAL);
 371
 372         if (ev == OBD_NOTIFY_DEACTIVATE || ev == OBD_NOTIFY_ACTIVATE) {
 373                 activate = (ev == OBD_NOTIFY_ACTIVATE);
 374
 375                 /*
 376                  * LU-642, initially inactive OSC could miss the obd_connect,
 377                  * we make up for it here.
 378                  */
 379                 if (activate && !tgt->ltd_exp) {
 380                         int rc;
 381                         struct obd_uuid lov_osc_uuid = {"LOV_OSC_UUID"};
 382
 383                         rc = obd_connect(NULL, &tgt->ltd_exp, tgt->ltd_obd,
 384                                          &lov_osc_uuid, &lov->lov_ocd,
 385                                          lov->lov_cache);
 386                         if (rc || !tgt->ltd_exp)
 387                                 GOTO(out, index = rc);
 388                 }
 389
 390                 if (lov->lov_tgts[index]->ltd_activate == activate) {
 391                         CDEBUG(D_INFO, "OSC %s already %sactivate!\n",
 392                                uuid->uuid, activate ? "" : "de");
 393                 } else {
 394                         lov->lov_tgts[index]->ltd_activate = activate;
 395                         CDEBUG(D_CONFIG, "%sactivate OSC %s\n",
 396                                activate ? "" : "de", obd_uuid2str(uuid));
 397                 }
 398         } else if (ev == OBD_NOTIFY_INACTIVE || ev == OBD_NOTIFY_ACTIVE) {
 399                 active = (ev == OBD_NOTIFY_ACTIVE);
 400
 401                 if (lov->lov_tgts[index]->ltd_active == active) {
 402                         CDEBUG(D_INFO, "OSC %s already %sactive!\n",
 403                                uuid->uuid, active ? "" : "in");
 404                         GOTO(out, index);
 405                 }
 406                 CDEBUG(D_CONFIG, "Marking OSC %s %sactive\n",
 407                        obd_uuid2str(uuid), active ? "" : "in");
 408
 409                 lov->lov_tgts[index]->ltd_active = active;
 410                 if (active) {
 411                         lov->desc.ld_active_tgt_count++;
 412                         lov->lov_tgts[index]->ltd_exp->exp_obd->obd_inactive = 0;
 413                 } else {
 414                         lov->desc.ld_active_tgt_count--;
 415                         lov->lov_tgts[index]->ltd_exp->exp_obd->obd_inactive = 1;
 416                 }
 417         } else {
 418                 CERROR("%s: unknown event %d for uuid %s\n", obd->obd_name,
 419                        ev, uuid->uuid);
 420         }
 421
 422         if (tgt->ltd_exp)
 423                 CDEBUG(D_INFO, "%s: lov idx %d conn %llx\n", obd_uuid2str(uuid),
 424                        index, tgt->ltd_exp->exp_handle.h_cookie);
 425
 426  out:
 427         lov_tgts_putref(obd);
 428         RETURN(index);
 429 }
 430
 431 static int lov_notify(struct obd_device *obd, struct obd_device *watched,
 432                       enum obd_notify_event ev)
 433 {
 434         int rc = 0;
 435         struct lov_obd *lov = &obd->u.lov;
 436         ENTRY;
 437
 438         down_read(&lov->lov_notify_lock);
 439         if (!lov->lov_connects)
 440                 GOTO(out_notify_lock, rc = 0);
 441
 442         if (ev == OBD_NOTIFY_ACTIVE || ev == OBD_NOTIFY_INACTIVE ||
 443             ev == OBD_NOTIFY_ACTIVATE || ev == OBD_NOTIFY_DEACTIVATE) {
 444                 struct obd_uuid *uuid;
 445
 446                 LASSERT(watched);
 447
 448                 if (strcmp(watched->obd_type->typ_name, LUSTRE_OSC_NAME)) {
 449                         CERROR("unexpected notification of %s %s\n",
 450                                watched->obd_type->typ_name, watched->obd_name);
 451                         GOTO(out_notify_lock, rc = -EINVAL);
 452                 }
 453
 454                 uuid = &watched->u.cli.cl_target_uuid;
 455
 456                 /* Set OSC as active before notifying the observer, so the
 457                  * observer can use the OSC normally.
 458                  */
 459                 rc = lov_set_osc_active(obd, uuid, ev);
 460                 if (rc < 0) {
 461                         CERROR("%s: event %d failed: rc = %d\n", obd->obd_name,
 462                                ev, rc);
 463                         GOTO(out_notify_lock, rc);
 464                 }
 465         }
 466
 467         /* Pass the notification up the chain. */
 468         rc = obd_notify_observer(obd, watched, ev);
 469
 470 out_notify_lock:
 471         up_read(&lov->lov_notify_lock);
 472
 473         RETURN(rc);
 474 }
 475
 476 static int lov_add_target(struct obd_device *obd, struct obd_uuid *uuidp,
 477                           u32 index, int gen, int active)
 478 {
 479         struct lov_obd *lov = &obd->u.lov;
 480         struct lov_tgt_desc *tgt;
 481         struct obd_device *tgt_obd;
 482         int rc;
 483
 484         ENTRY;
 485         CDEBUG(D_CONFIG, "uuid:%s idx:%u gen:%d active:%d\n",
 486                uuidp->uuid, index, gen, active);
 487
 488         if (gen <= 0) {
 489                 CERROR("%s: request to add '%s' with invalid generation: %d\n",
 490                        obd->obd_name, uuidp->uuid, gen);
 491                 RETURN(-EINVAL);
 492         }
 493
 494         tgt_obd = class_find_client_obd(uuidp, LUSTRE_OSC_NAME, &obd->obd_uuid);
 495         if (tgt_obd == NULL)
 496                 RETURN(-EINVAL);
 497
 498         mutex_lock(&lov->lov_lock);
 499
 500         if ((index < lov->lov_tgt_size) && (lov->lov_tgts[index] != NULL)) {
 501                 tgt = lov->lov_tgts[index];
 502                 rc = -EEXIST;
 503                 CERROR("%s: UUID %s already assigned at index %d: rc = %d\n",
 504                        obd->obd_name, obd_uuid2str(&tgt->ltd_uuid), index, rc);
 505                 mutex_unlock(&lov->lov_lock);
 506                 RETURN(rc);
 507         }
 508
 509         if (index >= lov->lov_tgt_size) {
 510                 /* We need to reallocate the lov target array. */
 511                 struct lov_tgt_desc **newtgts, **old = NULL;
 512                 __u32 newsize, oldsize = 0;
 513
 514                 newsize = max(lov->lov_tgt_size, 2U);
 515                 while (newsize < index + 1)
 516                         newsize = newsize << 1;
 517                 OBD_ALLOC_PTR_ARRAY(newtgts, newsize);
 518                 if (newtgts == NULL) {
 519                         mutex_unlock(&lov->lov_lock);
 520                         RETURN(-ENOMEM);
 521                 }
 522
 523                 if (lov->lov_tgt_size) {
 524                         memcpy(newtgts, lov->lov_tgts, sizeof(*newtgts) *
 525                                lov->lov_tgt_size);
 526                         old = lov->lov_tgts;
 527                         oldsize = lov->lov_tgt_size;
 528                 }
 529
 530                 lov->lov_tgts = newtgts;
 531                 lov->lov_tgt_size = newsize;
 532                 smp_rmb();
 533                 if (old)
 534                         OBD_FREE_PTR_ARRAY(old, oldsize);
 535
 536                 CDEBUG(D_CONFIG, "tgts: %p size: %d\n",
 537                        lov->lov_tgts, lov->lov_tgt_size);
 538         }
 539
 540         OBD_ALLOC_PTR(tgt);
 541         if (!tgt) {
 542                 mutex_unlock(&lov->lov_lock);
 543                 RETURN(-ENOMEM);
 544         }
 545
 546         rc = lu_tgt_pool_add(&lov->lov_packed, index, lov->lov_tgt_size);
 547         if (rc) {
 548                 mutex_unlock(&lov->lov_lock);
 549                 OBD_FREE_PTR(tgt);
 550                 RETURN(rc);
 551         }
 552
 553         tgt->ltd_uuid = *uuidp;
 554         tgt->ltd_obd = tgt_obd;
 555         /* XXX - add a sanity check on the generation number. */
 556         tgt->ltd_gen = gen;
 557         tgt->ltd_index = index;
 558         tgt->ltd_activate = active;
 559         lov->lov_tgts[index] = tgt;
 560         if (index >= lov->desc.ld_tgt_count)
 561                 lov->desc.ld_tgt_count = index + 1;
 562
 563         mutex_unlock(&lov->lov_lock);
 564
 565         CDEBUG(D_CONFIG, "idx=%d ltd_gen=%d ld_tgt_count=%d\n",
 566                 index, tgt->ltd_gen, lov->desc.ld_tgt_count);
 567
 568         if (lov->lov_connects == 0) {
 569                 /* lov_connect hasn't been called yet. We'll do the
 570                    lov_connect_osc on this target when that fn first runs,
 571                    because we don't know the connect flags yet. */
 572                 RETURN(0);
 573         }
 574
 575         lov_tgts_getref(obd);
 576
 577         rc = lov_connect_osc(obd, index, active, &lov->lov_ocd);
 578         if (rc)
 579                 GOTO(out, rc);
 580
 581         /* connect to administrative disabled ost */
 582         if (!tgt->ltd_exp)
 583                 GOTO(out, rc = 0);
 584
 585         rc = lov_notify(obd, tgt->ltd_exp->exp_obd,
 586                         active ? OBD_NOTIFY_CONNECT : OBD_NOTIFY_INACTIVE);
 587
 588 out:
 589         if (rc) {
 590                 CERROR("%s: add failed, deleting %s: rc = %d\n",
 591                        obd->obd_name, obd_uuid2str(&tgt->ltd_uuid), rc);
 592                 lov_del_target(obd, index, NULL, 0);
 593         }
 594         lov_tgts_putref(obd);
 595         RETURN(rc);
 596 }
 597
 598 /* Schedule a target for deletion */
 599 int lov_del_target(struct obd_device *obd, u32 index,
 600                    struct obd_uuid *uuidp, int gen)
 601 {
 602         struct lov_obd *lov = &obd->u.lov;
 603         int count = lov->desc.ld_tgt_count;
 604         int rc = 0;
 605         ENTRY;
 606
 607         if (index >= count) {
 608                 CERROR("LOV target index %d >= number of LOV OBDs %d.\n",
 609                        index, count);
 610                 RETURN(-EINVAL);
 611         }
 612
 613         /* to make sure there's no ongoing lov_notify() now */
 614         down_write(&lov->lov_notify_lock);
 615         lov_tgts_getref(obd);
 616
 617         if (!lov->lov_tgts[index]) {
 618                 CERROR("LOV target at index %d is not setup.\n", index);
 619                 GOTO(out, rc = -EINVAL);
 620         }
 621
 622         if (uuidp && !obd_uuid_equals(uuidp, &lov->lov_tgts[index]->ltd_uuid)) {
 623                 CERROR("LOV target UUID %s at index %d doesn't match %s.\n",
 624                        lov_uuid2str(lov, index), index,
 625                        obd_uuid2str(uuidp));
 626                 GOTO(out, rc = -EINVAL);
 627         }
 628
 629         CDEBUG(D_CONFIG, "uuid: %s idx: %d gen: %d exp: %p active: %d\n",
 630                lov_uuid2str(lov, index), index,
 631                lov->lov_tgts[index]->ltd_gen, lov->lov_tgts[index]->ltd_exp,
 632                lov->lov_tgts[index]->ltd_active);
 633
 634         lov->lov_tgts[index]->ltd_reap = 1;
 635         lov->lov_death_row++;
 636         /* we really delete it from lov_tgts_putref() */
 637 out:
 638         lov_tgts_putref(obd);
 639         up_write(&lov->lov_notify_lock);
 640
 641         RETURN(rc);
 642 }
 643
 644 static void __lov_del_obd(struct obd_device *obd, struct lov_tgt_desc *tgt)
 645 {
 646         struct obd_device *osc_obd;
 647
 648         LASSERT(tgt);
 649         LASSERT(tgt->ltd_reap);
 650
 651         osc_obd = class_exp2obd(tgt->ltd_exp);
 652
 653         CDEBUG(D_CONFIG, "Removing tgt %s : %s\n",
 654                tgt->ltd_uuid.uuid,
 655                osc_obd ? osc_obd->obd_name : "<no obd>");
 656
 657         if (tgt->ltd_exp)
 658                 lov_disconnect_obd(obd, tgt);
 659
 660         OBD_FREE_PTR(tgt);
 661
 662         /* Manual cleanup - no cleanup logs to clean up the osc's.  We must
 663            do it ourselves. And we can't do it from lov_cleanup,
 664            because we just lost our only reference to it. */
 665         if (osc_obd)
 666                 class_manual_cleanup(osc_obd);
 667 }
 668
 669 void lov_fix_desc_stripe_size(__u64 *val)
 670 {
 671         if (*val < LOV_MIN_STRIPE_SIZE) {
 672                 if (*val != 0)
 673                         LCONSOLE_INFO("Increasing default stripe size to "
 674                                       "minimum %u\n",
 675                                       LOV_DESC_STRIPE_SIZE_DEFAULT);
 676                 *val = LOV_DESC_STRIPE_SIZE_DEFAULT;
 677         } else if (*val & (LOV_MIN_STRIPE_SIZE - 1)) {
 678                 *val &= ~(LOV_MIN_STRIPE_SIZE - 1);
 679                 LCONSOLE_WARN("Changing default stripe size to %llu (a "
 680                               "multiple of %u)\n",
 681                               *val, LOV_MIN_STRIPE_SIZE);
 682         }
 683 }
 684
 685 void lov_fix_desc_stripe_count(__u32 *val)
 686 {
 687         if (*val == 0)
 688                 *val = 1;
 689 }
 690
 691 void lov_fix_desc_pattern(__u32 *val)
 692 {
 693         /* from lov_setstripe */
 694         if ((*val != 0) && !lov_pattern_supported_normal_comp(*val)) {
 695                 LCONSOLE_WARN("lov: Unknown stripe pattern: %#x\n", *val);
 696                 *val = 0;
 697         }
 698 }
 699
 700 void lov_fix_desc_qos_maxage(__u32 *val)
 701 {
 702         if (*val == 0)
 703                 *val = LOV_DESC_QOS_MAXAGE_DEFAULT;
 704 }
 705
 706 void lov_fix_desc(struct lov_desc *desc)
 707 {
 708         lov_fix_desc_stripe_size(&desc->ld_default_stripe_size);
 709         lov_fix_desc_stripe_count(&desc->ld_default_stripe_count);
 710         lov_fix_desc_pattern(&desc->ld_pattern);
 711         lov_fix_desc_qos_maxage(&desc->ld_qos_maxage);
 712 }
 713
 714 int lov_setup(struct obd_device *obd, struct lustre_cfg *lcfg)
 715 {
 716         struct lov_desc *desc;
 717         struct lov_obd *lov = &obd->u.lov;
 718         int rc;
 719         ENTRY;
 720
 721         if (LUSTRE_CFG_BUFLEN(lcfg, 1) < 1) {
 722                 CERROR("LOV setup requires a descriptor\n");
 723                 RETURN(-EINVAL);
 724         }
 725
 726         desc = (struct lov_desc *)lustre_cfg_buf(lcfg, 1);
 727
 728         if (sizeof(*desc) > LUSTRE_CFG_BUFLEN(lcfg, 1)) {
 729                 CERROR("descriptor size wrong: %d > %d\n",
 730                        (int)sizeof(*desc), LUSTRE_CFG_BUFLEN(lcfg, 1));
 731                 RETURN(-EINVAL);
 732         }
 733
 734         if (desc->ld_magic != LOV_DESC_MAGIC) {
 735                 if (desc->ld_magic == __swab32(LOV_DESC_MAGIC)) {
 736                             CDEBUG(D_OTHER, "%s: Swabbing lov desc %p\n",
 737                                    obd->obd_name, desc);
 738                             lustre_swab_lov_desc(desc);
 739                 } else {
 740                         CERROR("%s: Bad lov desc magic: %#x\n",
 741                                obd->obd_name, desc->ld_magic);
 742                         RETURN(-EINVAL);
 743                 }
 744         }
 745
 746         lov_fix_desc(desc);
 747
 748         desc->ld_active_tgt_count = 0;
 749         lov->desc = *desc;
 750         lov->lov_tgt_size = 0;
 751
 752         mutex_init(&lov->lov_lock);
 753         atomic_set(&lov->lov_refcount, 0);
 754         lov->lov_sp_me = LUSTRE_SP_CLI;
 755
 756         init_rwsem(&lov->lov_notify_lock);
 757
 758         INIT_LIST_HEAD(&lov->lov_pool_list);
 759         lov->lov_pool_count = 0;
 760         rc = lov_pool_hash_init(&lov->lov_pools_hash_body);
 761         if (rc)
 762                 GOTO(out, rc);
 763
 764         rc = lu_tgt_pool_init(&lov->lov_packed, 0);
 765         if (rc)
 766                 GOTO(out, rc);
 767
 768         rc = lov_tunables_init(obd);
 769         if (rc)
 770                 GOTO(out, rc);
 771
 772         lov->lov_tgts_kobj = kobject_create_and_add("target_obds",
 773                                                     &obd->obd_kset.kobj);
 774
 775 out:
 776         return rc;
 777 }
 778
 779 static int lov_cleanup(struct obd_device *obd)
 780 {
 781         struct lov_obd *lov = &obd->u.lov;
 782         struct list_head *pos, *tmp;
 783         struct pool_desc *pool;
 784         ENTRY;
 785
 786         if (lov->lov_tgts_kobj) {
 787                 kobject_put(lov->lov_tgts_kobj);
 788                 lov->lov_tgts_kobj = NULL;
 789         }
 790
 791         list_for_each_safe(pos, tmp, &lov->lov_pool_list) {
 792                 pool = list_entry(pos, struct pool_desc, pool_list);
 793                 /* free pool structs */
 794                 CDEBUG(D_INFO, "delete pool %p\n", pool);
 795                 /* In the function below, .hs_keycmp resolves to
 796                  * pool_hashkey_keycmp() */
 797                 /* coverity[overrun-buffer-val] */
 798                 lov_pool_del(obd, pool->pool_name);
 799         }
 800         lov_pool_hash_destroy(&lov->lov_pools_hash_body);
 801         lu_tgt_pool_free(&lov->lov_packed);
 802
 803         lprocfs_obd_cleanup(obd);
 804         if (lov->lov_tgts) {
 805                 int i;
 806                 lov_tgts_getref(obd);
 807                 for (i = 0; i < lov->desc.ld_tgt_count; i++) {
 808                         if (!lov->lov_tgts[i])
 809                                 continue;
 810
 811                         /* Inactive targets may never have connected */
 812                         if (lov->lov_tgts[i]->ltd_active)
 813                                 /* We should never get here - these
 814                                  * should have been removed in the
 815                                  * disconnect. */
 816                                 CERROR("%s: lov tgt %d not cleaned! "
 817                                        "deathrow=%d, lovrc=%d\n",
 818                                        obd->obd_name, i, lov->lov_death_row,
 819                                        atomic_read(&lov->lov_refcount));
 820                         lov_del_target(obd, i, NULL, 0);
 821                 }
 822                 lov_tgts_putref(obd);
 823                 OBD_FREE_PTR_ARRAY(lov->lov_tgts, lov->lov_tgt_size);
 824                 lov->lov_tgt_size = 0;
 825         }
 826
 827         if (lov->lov_cache != NULL) {
 828                 cl_cache_decref(lov->lov_cache);
 829                 lov->lov_cache = NULL;
 830         }
 831
 832         RETURN(0);
 833 }
 834
 835 int lov_process_config_base(struct obd_device *obd, struct lustre_cfg *lcfg,
 836                             u32 *indexp, int *genp)
 837 {
 838         struct obd_uuid obd_uuid;
 839         int cmd;
 840         int rc = 0;
 841
 842         ENTRY;
 843         switch (cmd = lcfg->lcfg_command) {
 844         case LCFG_ADD_MDC:
 845         case LCFG_DEL_MDC:
 846                 break;
 847         case LCFG_LOV_ADD_OBD:
 848         case LCFG_LOV_ADD_INA:
 849         case LCFG_LOV_DEL_OBD: {
 850                 u32 index;
 851                 int gen;
 852
 853                 /* lov_modify_tgts add  0:lov_mdsA  1:ost1_UUID  2:0  3:1 */
 854                 if (LUSTRE_CFG_BUFLEN(lcfg, 1) > sizeof(obd_uuid.uuid))
 855                         GOTO(out, rc = -EINVAL);
 856
 857                 obd_str2uuid(&obd_uuid,  lustre_cfg_buf(lcfg, 1));
 858
 859                 rc = kstrtou32(lustre_cfg_buf(lcfg, 2), 10, indexp);
 860                 if (rc)
 861                         GOTO(out, rc);
 862                 rc = kstrtoint(lustre_cfg_buf(lcfg, 3), 10, genp);
 863                 if (rc)
 864                         GOTO(out, rc);
 865                 index = *indexp;
 866                 gen = *genp;
 867                 if (cmd == LCFG_LOV_ADD_OBD)
 868                         rc = lov_add_target(obd, &obd_uuid, index, gen, 1);
 869                 else if (cmd == LCFG_LOV_ADD_INA)
 870                         rc = lov_add_target(obd, &obd_uuid, index, gen, 0);
 871                 else
 872                         rc = lov_del_target(obd, index, &obd_uuid, gen);
 873
 874                 GOTO(out, rc);
 875         }
 876         case LCFG_PARAM: {
 877                 struct lov_desc *desc = &(obd->u.lov.desc);
 878                 ssize_t count;
 879
 880                 if (!desc)
 881                         GOTO(out, rc = -EINVAL);
 882
 883                 count = class_modify_config(lcfg, PARAM_LOV,
 884                                             &obd->obd_kset.kobj);
 885                 GOTO(out, rc = count < 0 ? count : 0);
 886         }
 887         case LCFG_POOL_NEW:
 888         case LCFG_POOL_ADD:
 889         case LCFG_POOL_DEL:
 890         case LCFG_POOL_REM:
 891                 GOTO(out, rc);
 892
 893         default: {
 894                 CERROR("Unknown command: %d\n", lcfg->lcfg_command);
 895                 GOTO(out, rc = -EINVAL);
 896
 897         }
 898         }
 899 out:
 900         RETURN(rc);
 901 }
 902
 903 static int lov_statfs(const struct lu_env *env, struct obd_export *exp,
 904                       struct obd_statfs *osfs, time64_t max_age, __u32 flags)
 905 {
 906         struct obd_device *obd = class_exp2obd(exp);
 907         struct lov_obd *lov = &obd->u.lov;
 908         struct obd_info oinfo = {
 909                 .oi_osfs = osfs,
 910                 .oi_flags = flags,
 911         };
 912         struct ptlrpc_request_set *rqset;
 913         struct lov_request_set *set = NULL;
 914         struct lov_request *req;
 915         int rc = 0;
 916         int rc2;
 917
 918         ENTRY;
 919
 920         rqset = ptlrpc_prep_set();
 921         if (rqset == NULL)
 922                 RETURN(-ENOMEM);
 923
 924         rc = lov_prep_statfs_set(obd, &oinfo, &set);
 925         if (rc < 0)
 926                 GOTO(out_rqset, rc);
 927
 928         list_for_each_entry(req, &set->set_list, rq_link) {
 929                 rc = obd_statfs_async(lov->lov_tgts[req->rq_idx]->ltd_exp,
 930                                       &req->rq_oi, max_age, rqset);
 931                 if (rc < 0)
 932                         GOTO(out_set, rc);
 933         }
 934
 935         rc = ptlrpc_set_wait(env, rqset);
 936
 937 out_set:
 938         if (rc < 0)
 939                 atomic_set(&set->set_completes, 0);
 940
 941         rc2 = lov_fini_statfs_set(set);
 942         if (rc == 0)
 943                 rc = rc2;
 944
 945 out_rqset:
 946         ptlrpc_set_destroy(rqset);
 947
 948         RETURN(rc);
 949 }
 950
 951 static int lov_iocontrol(unsigned int cmd, struct obd_export *exp, int len,
 952                          void *karg, void __user *uarg)
 953 {
 954         struct obd_device *obd = class_exp2obd(exp);
 955         struct lov_obd *lov = &obd->u.lov;
 956         int i = 0, rc = 0, count = lov->desc.ld_tgt_count;
 957
 958         ENTRY;
 959         switch (cmd) {
 960         case IOC_OBD_STATFS: {
 961                 struct obd_ioctl_data *data = karg;
 962                 struct obd_device *osc_obd;
 963                 struct obd_statfs stat_buf = {0};
 964                 struct obd_import *imp;
 965                 __u32 index;
 966                 __u32 flags;
 967
 968                 memcpy(&index, data->ioc_inlbuf2, sizeof(index));
 969                 if (index >= count)
 970                         RETURN(-ENODEV);
 971
 972                 if (!lov->lov_tgts[index])
 973                         /* Try again with the next index */
 974                         RETURN(-EAGAIN);
 975
 976                 osc_obd = class_exp2obd(lov->lov_tgts[index]->ltd_exp);
 977                 if (!osc_obd)
 978                         RETURN(-EINVAL);
 979
 980                 imp = osc_obd->u.cli.cl_import;
 981                 if (!lov->lov_tgts[index]->ltd_active &&
 982                     imp->imp_state != LUSTRE_IMP_IDLE)
 983                         RETURN(-ENODATA);
 984
 985                 /* copy UUID */
 986                 if (copy_to_user(data->ioc_pbuf2, obd2cli_tgt(osc_obd),
 987                                  min_t(unsigned long, data->ioc_plen2,
 988                                        sizeof(struct obd_uuid))))
 989                         RETURN(-EFAULT);
 990
 991                 memcpy(&flags, data->ioc_inlbuf1, sizeof(flags));
 992                 flags = flags & LL_STATFS_NODELAY ? OBD_STATFS_NODELAY : 0;
 993
 994                 /* got statfs data */
 995                 rc = obd_statfs(NULL, lov->lov_tgts[index]->ltd_exp, &stat_buf,
 996                                 ktime_get_seconds() - OBD_STATFS_CACHE_SECONDS,
 997                                 flags);
 998                 if (rc)
 999                         RETURN(rc);
1000                 if (copy_to_user(data->ioc_pbuf1, &stat_buf,
1001                                  min_t(unsigned long, data->ioc_plen1,
1002                                        sizeof(struct obd_statfs))))
1003                         RETURN(-EFAULT);
1004                 break;
1005         }
1006         case OBD_IOC_QUOTACTL: {
1007                 struct if_quotactl *qctl = karg;
1008                 struct lov_tgt_desc *tgt = NULL;
1009                 struct obd_quotactl *oqctl;
1010
1011                 if (qctl->qc_valid == QC_OSTIDX) {
1012                         if (count <= qctl->qc_idx)
1013                                 RETURN(-EINVAL);
1014
1015                         tgt = lov->lov_tgts[qctl->qc_idx];
1016                         if (!tgt || !tgt->ltd_exp)
1017                                 RETURN(-EINVAL);
1018                 } else if (qctl->qc_valid == QC_UUID) {
1019                         for (i = 0; i < count; i++) {
1020                                 tgt = lov->lov_tgts[i];
1021                                 if (!tgt ||
1022                                     !obd_uuid_equals(&tgt->ltd_uuid,
1023                                                      &qctl->obd_uuid))
1024                                         continue;
1025
1026                                 if (tgt->ltd_exp == NULL)
1027                                         RETURN(-EINVAL);
1028
1029                                 break;
1030                         }
1031                 } else {
1032                         RETURN(-EINVAL);
1033                 }
1034
1035                 if (i >= count)
1036                         RETURN(-EAGAIN);
1037
1038                 LASSERT(tgt && tgt->ltd_exp);
1039                 OBD_ALLOC_PTR(oqctl);
1040                 if (!oqctl)
1041                         RETURN(-ENOMEM);
1042
1043                 QCTL_COPY(oqctl, qctl);
1044                 rc = obd_quotactl(tgt->ltd_exp, oqctl);
1045                 if (rc == 0) {
1046                         QCTL_COPY(qctl, oqctl);
1047                         qctl->qc_valid = QC_OSTIDX;
1048                         qctl->obd_uuid = tgt->ltd_uuid;
1049                 }
1050                 OBD_FREE_PTR(oqctl);
1051                 break;
1052         }
1053         default: {
1054                 int set = 0;
1055
1056                 if (count == 0)
1057                         RETURN(-ENOTTY);
1058
1059                 for (i = 0; i < count; i++) {
1060                         int err;
1061                         struct obd_device *osc_obd;
1062
1063                         /* OST was disconnected */
1064                         if (!lov->lov_tgts[i] || !lov->lov_tgts[i]->ltd_exp)
1065                                 continue;
1066
1067                         /* ll_umount_begin() sets force on lov, pass to osc */
1068                         osc_obd = class_exp2obd(lov->lov_tgts[i]->ltd_exp);
1069                         if (osc_obd)
1070                                 osc_obd->obd_force = obd->obd_force;
1071                         err = obd_iocontrol(cmd, lov->lov_tgts[i]->ltd_exp,
1072                                             len, karg, uarg);
1073                         if (err) {
1074                                 if (lov->lov_tgts[i]->ltd_active) {
1075                                         CDEBUG_LIMIT(err == -ENOTTY ?
1076                                                      D_IOCTL : D_WARNING,
1077                                                      "iocontrol OSC %s on OST idx %d cmd %x: err = %d\n",
1078                                                      lov_uuid2str(lov, i),
1079                                                      i, cmd, err);
1080                                         if (!rc)
1081                                                 rc = err;
1082                                 }
1083                         } else {
1084                                 set = 1;
1085                         }
1086                 }
1087                 if (!set && !rc)
1088                         rc = -EIO;
1089         }
1090         }
1091
1092         RETURN(rc);
1093 }
1094
1095 static int lov_get_info(const struct lu_env *env, struct obd_export *exp,
1096                         __u32 keylen, void *key, __u32 *vallen, void *val)
1097 {
1098         struct obd_device *obd = class_exp2obd(exp);
1099         struct lov_obd *lov = &obd->u.lov;
1100         struct lov_desc *ld = &lov->desc;
1101         int rc = 0;
1102         ENTRY;
1103
1104         if (vallen == NULL || val == NULL)
1105                 RETURN(-EFAULT);
1106
1107         lov_tgts_getref(obd);
1108
1109         if (KEY_IS(KEY_MAX_EASIZE)) {
1110                 *((u32 *)val) = exp->exp_connect_data.ocd_max_easize;
1111         } else if (KEY_IS(KEY_DEFAULT_EASIZE)) {
1112                 u32 def_stripe_count = min_t(u32, ld->ld_default_stripe_count,
1113                                              LOV_MAX_STRIPE_COUNT);
1114
1115                 *((u32 *)val) = lov_mds_md_size(def_stripe_count, LOV_MAGIC_V3);
1116         } else if (KEY_IS(KEY_TGT_COUNT)) {
1117                 *((int *)val) = lov->desc.ld_tgt_count;
1118         } else {
1119                 rc = -EINVAL;
1120         }
1121
1122         lov_tgts_putref(obd);
1123
1124         RETURN(rc);
1125 }
1126
1127 static int lov_set_info_async(const struct lu_env *env, struct obd_export *exp,
1128                               __u32 keylen, void *key,
1129                               __u32 vallen, void *val,
1130                               struct ptlrpc_request_set *set)
1131 {
1132         struct obd_device *obd = class_exp2obd(exp);
1133         struct lov_obd *lov = &obd->u.lov;
1134         struct lov_tgt_desc *tgt;
1135         bool do_inactive = false, no_set = false;
1136         u32 i;
1137         int rc = 0;
1138         int err;
1139
1140         ENTRY;
1141
1142         if (set == NULL) {
1143                 no_set = true;
1144                 set = ptlrpc_prep_set();
1145                 if (!set)
1146                         RETURN(-ENOMEM);
1147         }
1148
1149         lov_tgts_getref(obd);
1150
1151         if (KEY_IS(KEY_CHECKSUM))
1152                 do_inactive = true;
1153
1154         for (i = 0; i < lov->desc.ld_tgt_count; i++) {
1155                 tgt = lov->lov_tgts[i];
1156
1157                 /* OST was disconnected */
1158                 if (tgt == NULL || tgt->ltd_exp == NULL)
1159                         continue;
1160
1161                 /* OST is inactive and we don't want inactive OSCs */
1162                 if (!tgt->ltd_active && !do_inactive)
1163                         continue;
1164
1165                 err = obd_set_info_async(env, tgt->ltd_exp, keylen, key,
1166                                          vallen, val, set);
1167
1168                 if (rc == 0)
1169                         rc = err;
1170         }
1171
1172         /* cycle through MDC target for Data-on-MDT */
1173         for (i = 0; i < LOV_MDC_TGT_MAX; i++) {
1174                 struct obd_device *mdc;
1175
1176                 mdc = lov->lov_mdc_tgts[i].lmtd_mdc;
1177                 if (mdc == NULL)
1178                         continue;
1179
1180                 err = obd_set_info_async(env, mdc->obd_self_export,
1181                                          keylen, key, vallen, val, set);
1182                 if (rc == 0)
1183                         rc = err;
1184         }
1185
1186         lov_tgts_putref(obd);
1187         if (no_set) {
1188                 err = ptlrpc_set_wait(env, set);
1189                 if (rc == 0)
1190                         rc = err;
1191                 ptlrpc_set_destroy(set);
1192         }
1193         RETURN(rc);
1194 }
1195
1196 void lov_stripe_lock(struct lov_stripe_md *md)
1197 __acquires(&md->lsm_lock)
1198 {
1199         LASSERT(md->lsm_lock_owner != current->pid);
1200         spin_lock(&md->lsm_lock);
1201         LASSERT(md->lsm_lock_owner == 0);
1202         md->lsm_lock_owner = current->pid;
1203 }
1204
1205 void lov_stripe_unlock(struct lov_stripe_md *md)
1206 __releases(&md->lsm_lock)
1207 {
1208         LASSERT(md->lsm_lock_owner == current->pid);
1209         md->lsm_lock_owner = 0;
1210         spin_unlock(&md->lsm_lock);
1211 }
1212
1213 static int lov_quotactl(struct obd_device *obd, struct obd_export *exp,
1214                         struct obd_quotactl *oqctl)
1215 {
1216         struct lov_obd *lov = &obd->u.lov;
1217         struct lov_tgt_desc *tgt;
1218         struct pool_desc *pool = NULL;
1219         __u64 curspace = 0;
1220         __u64 bhardlimit = 0;
1221         int i, rc = 0;
1222
1223         ENTRY;
1224         if (oqctl->qc_cmd != Q_GETOQUOTA &&
1225             oqctl->qc_cmd != LUSTRE_Q_SETQUOTA &&
1226             oqctl->qc_cmd != LUSTRE_Q_GETQUOTAPOOL) {
1227                 rc = -EFAULT;
1228                 CERROR("%s: bad quota opc %x for lov obd: rc = %d\n",
1229                        obd->obd_name, oqctl->qc_cmd, rc);
1230                 RETURN(rc);
1231         }
1232
1233         if (oqctl->qc_cmd == LUSTRE_Q_GETQUOTAPOOL) {
1234                 pool = lov_pool_find(obd, oqctl->qc_poolname);
1235                 if (!pool)
1236                         RETURN(-ENOENT);
1237                 /* Set Q_GETOQUOTA back as targets report it's own
1238                  * usage and doesn't care about pools */
1239                 oqctl->qc_cmd = Q_GETOQUOTA;
1240         }
1241
1242         /* for lov tgt */
1243         lov_tgts_getref(obd);
1244         for (i = 0; i < lov->desc.ld_tgt_count; i++) {
1245                 int err;
1246
1247                 tgt = lov->lov_tgts[i];
1248
1249                 if (!tgt)
1250                         continue;
1251
1252                 if (pool &&
1253                     lu_tgt_check_index(tgt->ltd_index, &pool->pool_obds))
1254                         continue;
1255
1256                 if (!tgt->ltd_active || tgt->ltd_reap) {
1257                         if (oqctl->qc_cmd == Q_GETOQUOTA &&
1258                             lov->lov_tgts[i]->ltd_activate) {
1259                                 rc = -ENETDOWN;
1260                                 CERROR("%s: ost %d is inactive: rc = %d\n",
1261                                        obd->obd_name, i, rc);
1262                         } else {
1263                                 CDEBUG(D_HA, "ost %d is inactive\n", i);
1264                         }
1265                         continue;
1266                 }
1267
1268                 err = obd_quotactl(tgt->ltd_exp, oqctl);
1269                 if (err) {
1270                         if (tgt->ltd_active && !rc)
1271                                 rc = err;
1272                         continue;
1273                 }
1274
1275                 if (oqctl->qc_cmd == Q_GETOQUOTA) {
1276                         curspace += oqctl->qc_dqblk.dqb_curspace;
1277                         bhardlimit += oqctl->qc_dqblk.dqb_bhardlimit;
1278                 }
1279         }
1280         lov_tgts_putref(obd);
1281         if (pool)
1282                 lov_pool_putref(pool);
1283
1284         if (oqctl->qc_cmd == Q_GETOQUOTA) {
1285                 oqctl->qc_dqblk.dqb_curspace = curspace;
1286                 oqctl->qc_dqblk.dqb_bhardlimit = bhardlimit;
1287         }
1288         RETURN(rc);
1289 }
1290
1291 static const struct obd_ops lov_obd_ops = {
1292         .o_owner                = THIS_MODULE,
1293         .o_setup                = lov_setup,
1294         .o_cleanup              = lov_cleanup,
1295         .o_connect              = lov_connect,
1296         .o_disconnect           = lov_disconnect,
1297         .o_statfs               = lov_statfs,
1298         .o_iocontrol            = lov_iocontrol,
1299         .o_get_info             = lov_get_info,
1300         .o_set_info_async       = lov_set_info_async,
1301         .o_notify               = lov_notify,
1302         .o_pool_new             = lov_pool_new,
1303         .o_pool_rem             = lov_pool_remove,
1304         .o_pool_add             = lov_pool_add,
1305         .o_pool_del             = lov_pool_del,
1306         .o_quotactl             = lov_quotactl,
1307 };
1308
1309 struct kmem_cache *lov_oinfo_slab;
1310
1311 static int __init lov_init(void)
1312 {
1313         int rc;
1314         ENTRY;
1315
1316         /* print an address of _any_ initialized kernel symbol from this
1317          * module, to allow debugging with gdb that doesn't support data
1318          * symbols from modules.*/
1319         CDEBUG(D_INFO, "Lustre LOV module (%p).\n", &lov_caches);
1320
1321         rc = lu_kmem_init(lov_caches);
1322         if (rc)
1323                 return rc;
1324
1325         lov_oinfo_slab = kmem_cache_create("lov_oinfo",
1326                                            sizeof(struct lov_oinfo), 0,
1327                                            SLAB_HWCACHE_ALIGN, NULL);
1328         if (lov_oinfo_slab == NULL) {
1329                 lu_kmem_fini(lov_caches);
1330                 return -ENOMEM;
1331         }
1332
1333         rc = class_register_type(&lov_obd_ops, NULL, true,
1334                                  LUSTRE_LOV_NAME, &lov_device_type);
1335         if (rc) {
1336                 kmem_cache_destroy(lov_oinfo_slab);
1337                 lu_kmem_fini(lov_caches);
1338         }
1339
1340         RETURN(rc);
1341 }
1342
1343 static void __exit lov_exit(void)
1344 {
1345         class_unregister_type(LUSTRE_LOV_NAME);
1346         kmem_cache_destroy(lov_oinfo_slab);
1347         lu_kmem_fini(lov_caches);
1348 }
1349
1350 MODULE_AUTHOR("OpenSFS, Inc. <http://www.lustre.org/>");
1351 MODULE_DESCRIPTION("Lustre Logical Object Volume");
1352 MODULE_VERSION(LUSTRE_VERSION_STRING);
1353 MODULE_LICENSE("GPL");
1354
1355 module_init(lov_init);
1356 module_exit(lov_exit);