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 pool_desc *pool, *tmp;
 783         ENTRY;
 784
 785         if (lov->lov_tgts_kobj) {
 786                 kobject_put(lov->lov_tgts_kobj);
 787                 lov->lov_tgts_kobj = NULL;
 788         }
 789
 790         list_for_each_entry_safe(pool, tmp, &lov->lov_pool_list, pool_list) {
 791                 /* free pool structs */
 792                 CDEBUG(D_INFO, "delete pool %p\n", pool);
 793                 /* In the function below, .hs_keycmp resolves to
 794                  * pool_hashkey_keycmp() */
 795                 /* coverity[overrun-buffer-val] */
 796                 lov_pool_del(obd, pool->pool_name);
 797         }
 798         lov_pool_hash_destroy(&lov->lov_pools_hash_body);
 799         lu_tgt_pool_free(&lov->lov_packed);
 800
 801         lprocfs_obd_cleanup(obd);
 802         if (lov->lov_tgts) {
 803                 int i;
 804                 lov_tgts_getref(obd);
 805                 for (i = 0; i < lov->desc.ld_tgt_count; i++) {
 806                         if (!lov->lov_tgts[i])
 807                                 continue;
 808
 809                         /* Inactive targets may never have connected */
 810                         if (lov->lov_tgts[i]->ltd_active)
 811                                 /* We should never get here - these
 812                                  * should have been removed in the
 813                                  * disconnect. */
 814                                 CERROR("%s: lov tgt %d not cleaned! "
 815                                        "deathrow=%d, lovrc=%d\n",
 816                                        obd->obd_name, i, lov->lov_death_row,
 817                                        atomic_read(&lov->lov_refcount));
 818                         lov_del_target(obd, i, NULL, 0);
 819                 }
 820                 lov_tgts_putref(obd);
 821                 OBD_FREE_PTR_ARRAY(lov->lov_tgts, lov->lov_tgt_size);
 822                 lov->lov_tgt_size = 0;
 823         }
 824
 825         if (lov->lov_cache != NULL) {
 826                 cl_cache_decref(lov->lov_cache);
 827                 lov->lov_cache = NULL;
 828         }
 829
 830         RETURN(0);
 831 }
 832
 833 int lov_process_config_base(struct obd_device *obd, struct lustre_cfg *lcfg,
 834                             u32 *indexp, int *genp)
 835 {
 836         struct obd_uuid obd_uuid;
 837         int cmd;
 838         int rc = 0;
 839
 840         ENTRY;
 841         switch (cmd = lcfg->lcfg_command) {
 842         case LCFG_ADD_MDC:
 843         case LCFG_DEL_MDC:
 844                 break;
 845         case LCFG_LOV_ADD_OBD:
 846         case LCFG_LOV_ADD_INA:
 847         case LCFG_LOV_DEL_OBD: {
 848                 u32 index;
 849                 int gen;
 850
 851                 /* lov_modify_tgts add  0:lov_mdsA  1:ost1_UUID  2:0  3:1 */
 852                 if (LUSTRE_CFG_BUFLEN(lcfg, 1) > sizeof(obd_uuid.uuid))
 853                         GOTO(out, rc = -EINVAL);
 854
 855                 obd_str2uuid(&obd_uuid,  lustre_cfg_buf(lcfg, 1));
 856
 857                 rc = kstrtou32(lustre_cfg_buf(lcfg, 2), 10, indexp);
 858                 if (rc)
 859                         GOTO(out, rc);
 860                 rc = kstrtoint(lustre_cfg_buf(lcfg, 3), 10, genp);
 861                 if (rc)
 862                         GOTO(out, rc);
 863                 index = *indexp;
 864                 gen = *genp;
 865                 if (cmd == LCFG_LOV_ADD_OBD)
 866                         rc = lov_add_target(obd, &obd_uuid, index, gen, 1);
 867                 else if (cmd == LCFG_LOV_ADD_INA)
 868                         rc = lov_add_target(obd, &obd_uuid, index, gen, 0);
 869                 else
 870                         rc = lov_del_target(obd, index, &obd_uuid, gen);
 871
 872                 GOTO(out, rc);
 873         }
 874         case LCFG_PARAM: {
 875                 struct lov_desc *desc = &(obd->u.lov.desc);
 876                 ssize_t count;
 877
 878                 if (!desc)
 879                         GOTO(out, rc = -EINVAL);
 880
 881                 count = class_modify_config(lcfg, PARAM_LOV,
 882                                             &obd->obd_kset.kobj);
 883                 GOTO(out, rc = count < 0 ? count : 0);
 884         }
 885         case LCFG_POOL_NEW:
 886         case LCFG_POOL_ADD:
 887         case LCFG_POOL_DEL:
 888         case LCFG_POOL_REM:
 889                 GOTO(out, rc);
 890
 891         default: {
 892                 CERROR("Unknown command: %d\n", lcfg->lcfg_command);
 893                 GOTO(out, rc = -EINVAL);
 894
 895         }
 896         }
 897 out:
 898         RETURN(rc);
 899 }
 900
 901 static int lov_statfs(const struct lu_env *env, struct obd_export *exp,
 902                       struct obd_statfs *osfs, time64_t max_age, __u32 flags)
 903 {
 904         struct obd_device *obd = class_exp2obd(exp);
 905         struct lov_obd *lov = &obd->u.lov;
 906         struct obd_info oinfo = {
 907                 .oi_osfs = osfs,
 908                 .oi_flags = flags,
 909         };
 910         struct ptlrpc_request_set *rqset;
 911         struct lov_request_set *set = NULL;
 912         struct lov_request *req;
 913         int rc = 0;
 914         int rc2;
 915
 916         ENTRY;
 917
 918         rqset = ptlrpc_prep_set();
 919         if (rqset == NULL)
 920                 RETURN(-ENOMEM);
 921
 922         rc = lov_prep_statfs_set(obd, &oinfo, &set);
 923         if (rc < 0)
 924                 GOTO(out_rqset, rc);
 925
 926         list_for_each_entry(req, &set->set_list, rq_link) {
 927                 rc = obd_statfs_async(lov->lov_tgts[req->rq_idx]->ltd_exp,
 928                                       &req->rq_oi, max_age, rqset);
 929                 if (rc < 0)
 930                         GOTO(out_set, rc);
 931         }
 932
 933         rc = ptlrpc_set_wait(env, rqset);
 934
 935 out_set:
 936         if (rc < 0)
 937                 atomic_set(&set->set_completes, 0);
 938
 939         rc2 = lov_fini_statfs_set(set);
 940         if (rc == 0)
 941                 rc = rc2;
 942
 943 out_rqset:
 944         ptlrpc_set_destroy(rqset);
 945
 946         RETURN(rc);
 947 }
 948
 949 static int lov_iocontrol(unsigned int cmd, struct obd_export *exp, int len,
 950                          void *karg, void __user *uarg)
 951 {
 952         struct obd_device *obd = class_exp2obd(exp);
 953         struct lov_obd *lov = &obd->u.lov;
 954         int i = 0, rc = 0, count = lov->desc.ld_tgt_count;
 955
 956         ENTRY;
 957         CDEBUG(D_IOCTL, "%s: cmd=%x len=%u karg=%pK uarg=%pK\n",
 958                exp->exp_obd->obd_name, cmd, len, karg, uarg);
 959
 960         /* exit early for unknown ioctl types */
 961         if (unlikely(_IOC_TYPE(cmd) != 'f' && cmd != IOC_OSC_SET_ACTIVE))
 962                 RETURN(OBD_IOC_DEBUG(D_IOCTL, obd->obd_name, cmd, "unknown",
 963                                      -ENOTTY));
 964
 965         /* can't do a generic karg == NULL check here, since it is too noisy and
 966          * we need to return -ENOTTY for unsupported ioctls instead of -EINVAL.
 967          */
 968         switch (cmd) {
 969         case IOC_OBD_STATFS: {
 970                 struct obd_ioctl_data *data;
 971                 struct obd_device *osc_obd;
 972                 struct obd_statfs stat_buf = {0};
 973                 struct obd_import *imp;
 974                 __u32 index;
 975                 __u32 flags;
 976
 977                 if (unlikely(karg == NULL))
 978                         RETURN(OBD_IOC_ERROR(obd->obd_name, cmd, "karg=null",
 979                                              -EINVAL));
 980                 data = karg;
 981
 982                 memcpy(&index, data->ioc_inlbuf2, sizeof(index));
 983                 if (index >= count)
 984                         RETURN(-ENODEV);
 985
 986                 if (!lov->lov_tgts[index])
 987                         /* Try again with the next index */
 988                         RETURN(-EAGAIN);
 989
 990                 osc_obd = class_exp2obd(lov->lov_tgts[index]->ltd_exp);
 991                 if (!osc_obd)
 992                         RETURN(-EINVAL);
 993
 994                 imp = osc_obd->u.cli.cl_import;
 995                 if (!lov->lov_tgts[index]->ltd_active &&
 996                     imp->imp_state != LUSTRE_IMP_IDLE)
 997                         RETURN(-ENODATA);
 998
 999                 /* copy UUID */
1000                 if (copy_to_user(data->ioc_pbuf2, obd2cli_tgt(osc_obd),
1001                                  min_t(unsigned long, data->ioc_plen2,
1002                                        sizeof(struct obd_uuid))))
1003                         RETURN(-EFAULT);
1004
1005                 memcpy(&flags, data->ioc_inlbuf1, sizeof(flags));
1006                 flags = flags & LL_STATFS_NODELAY ? OBD_STATFS_NODELAY : 0;
1007
1008                 /* got statfs data */
1009                 rc = obd_statfs(NULL, lov->lov_tgts[index]->ltd_exp, &stat_buf,
1010                                 ktime_get_seconds() - OBD_STATFS_CACHE_SECONDS,
1011                                 flags);
1012                 if (rc)
1013                         RETURN(rc);
1014                 if (copy_to_user(data->ioc_pbuf1, &stat_buf,
1015                                  min_t(unsigned long, data->ioc_plen1,
1016                                        sizeof(struct obd_statfs))))
1017                         RETURN(-EFAULT);
1018                 break;
1019         }
1020         case OBD_IOC_QUOTACTL: {
1021                 struct if_quotactl *qctl;
1022                 struct lov_tgt_desc *tgt = NULL;
1023                 struct obd_quotactl *oqctl;
1024                 struct obd_import *imp;
1025
1026                 if (unlikely(karg == NULL))
1027                         RETURN(OBD_IOC_ERROR(obd->obd_name, cmd, "karg=null",
1028                                              -EINVAL));
1029                 qctl = karg;
1030
1031                 if (qctl->qc_valid == QC_OSTIDX) {
1032                         if (count <= qctl->qc_idx)
1033                                 RETURN(-EINVAL);
1034
1035                         tgt = lov->lov_tgts[qctl->qc_idx];
1036                         if (!tgt)
1037                                 RETURN(-ENODEV);
1038
1039                         if (!tgt->ltd_exp)
1040                                 RETURN(-EINVAL);
1041                 } else if (qctl->qc_valid == QC_UUID) {
1042                         for (i = 0; i < count; i++) {
1043                                 tgt = lov->lov_tgts[i];
1044                                 if (!tgt ||
1045                                     !obd_uuid_equals(&tgt->ltd_uuid,
1046                                                      &qctl->obd_uuid))
1047                                         continue;
1048
1049                                 if (tgt->ltd_exp == NULL)
1050                                         RETURN(-EINVAL);
1051
1052                                 break;
1053                         }
1054                 } else {
1055                         RETURN(-EINVAL);
1056                 }
1057
1058                 if (i >= count)
1059                         RETURN(-EAGAIN);
1060
1061                 LASSERT(tgt && tgt->ltd_exp);
1062                 imp = class_exp2cliimp(tgt->ltd_exp);
1063                 if (!tgt->ltd_active && imp->imp_state != LUSTRE_IMP_IDLE) {
1064                         qctl->qc_valid = QC_OSTIDX;
1065                         qctl->obd_uuid = tgt->ltd_uuid;
1066                         RETURN(-ENODATA);
1067                 }
1068
1069                 OBD_ALLOC_PTR(oqctl);
1070                 if (!oqctl)
1071                         RETURN(-ENOMEM);
1072
1073                 QCTL_COPY(oqctl, qctl);
1074                 rc = obd_quotactl(tgt->ltd_exp, oqctl);
1075                 if (rc == 0) {
1076                         QCTL_COPY(qctl, oqctl);
1077                         qctl->qc_valid = QC_OSTIDX;
1078                         qctl->obd_uuid = tgt->ltd_uuid;
1079                 }
1080                 OBD_FREE_PTR(oqctl);
1081                 break;
1082         }
1083         default: {
1084                 int set = 0;
1085
1086                 if (count == 0)
1087                         RETURN(-ENOTTY);
1088
1089                 for (i = 0; i < count; i++) {
1090                         int err;
1091                         struct obd_device *osc_obd;
1092
1093                         /* OST was disconnected */
1094                         if (!lov->lov_tgts[i] || !lov->lov_tgts[i]->ltd_exp)
1095                                 continue;
1096
1097                         /* ll_umount_begin() sets force on lov, pass to osc */
1098                         osc_obd = class_exp2obd(lov->lov_tgts[i]->ltd_exp);
1099                         if (osc_obd)
1100                                 osc_obd->obd_force = obd->obd_force;
1101                         err = obd_iocontrol(cmd, lov->lov_tgts[i]->ltd_exp,
1102                                             len, karg, uarg);
1103                         if (err) {
1104                                 if (lov->lov_tgts[i]->ltd_active) {
1105                                         OBD_IOC_DEBUG(err == -ENOTTY ?
1106                                                       D_IOCTL : D_WARNING,
1107                                                       obd->obd_name, cmd,
1108                                                       lov_uuid2str(lov, i),
1109                                                       err);
1110                                         if (!rc)
1111                                                 rc = err;
1112
1113                                         if (err == -ENOTTY)
1114                                                 break;
1115                                 }
1116                         } else {
1117                                 set = 1;
1118                         }
1119                 }
1120                 if (!set && !rc)
1121                         rc = -EIO;
1122                 break;
1123         }
1124         }
1125
1126         RETURN(rc);
1127 }
1128
1129 static int lov_get_info(const struct lu_env *env, struct obd_export *exp,
1130                         __u32 keylen, void *key, __u32 *vallen, void *val)
1131 {
1132         struct obd_device *obd = class_exp2obd(exp);
1133         struct lov_obd *lov = &obd->u.lov;
1134         struct lov_desc *ld = &lov->desc;
1135         int rc = 0;
1136         ENTRY;
1137
1138         if (vallen == NULL || val == NULL)
1139                 RETURN(-EFAULT);
1140
1141         lov_tgts_getref(obd);
1142
1143         if (KEY_IS(KEY_MAX_EASIZE)) {
1144                 *((u32 *)val) = exp->exp_connect_data.ocd_max_easize;
1145         } else if (KEY_IS(KEY_DEFAULT_EASIZE)) {
1146                 u32 def_stripe_count = min_t(u32, ld->ld_default_stripe_count,
1147                                              LOV_MAX_STRIPE_COUNT);
1148
1149                 *((u32 *)val) = lov_mds_md_size(def_stripe_count, LOV_MAGIC_V3);
1150         } else if (KEY_IS(KEY_TGT_COUNT)) {
1151                 *((int *)val) = lov->desc.ld_tgt_count;
1152         } else {
1153                 rc = -EINVAL;
1154         }
1155
1156         lov_tgts_putref(obd);
1157
1158         RETURN(rc);
1159 }
1160
1161 static int lov_set_info_async(const struct lu_env *env, struct obd_export *exp,
1162                               __u32 keylen, void *key,
1163                               __u32 vallen, void *val,
1164                               struct ptlrpc_request_set *set)
1165 {
1166         struct obd_device *obd = class_exp2obd(exp);
1167         struct lov_obd *lov = &obd->u.lov;
1168         struct lov_tgt_desc *tgt;
1169         bool do_inactive = false, no_set = false;
1170         u32 i;
1171         int rc = 0;
1172         int err;
1173
1174         ENTRY;
1175
1176         if (set == NULL) {
1177                 no_set = true;
1178                 set = ptlrpc_prep_set();
1179                 if (!set)
1180                         RETURN(-ENOMEM);
1181         }
1182
1183         lov_tgts_getref(obd);
1184
1185         if (KEY_IS(KEY_CHECKSUM))
1186                 do_inactive = true;
1187
1188         for (i = 0; i < lov->desc.ld_tgt_count; i++) {
1189                 tgt = lov->lov_tgts[i];
1190
1191                 /* OST was disconnected */
1192                 if (tgt == NULL || tgt->ltd_exp == NULL)
1193                         continue;
1194
1195                 /* OST is inactive and we don't want inactive OSCs */
1196                 if (!tgt->ltd_active && !do_inactive)
1197                         continue;
1198
1199                 err = obd_set_info_async(env, tgt->ltd_exp, keylen, key,
1200                                          vallen, val, set);
1201
1202                 if (rc == 0)
1203                         rc = err;
1204         }
1205
1206         /* cycle through MDC target for Data-on-MDT */
1207         for (i = 0; i < LOV_MDC_TGT_MAX; i++) {
1208                 struct obd_device *mdc;
1209
1210                 mdc = lov->lov_mdc_tgts[i].lmtd_mdc;
1211                 if (mdc == NULL)
1212                         continue;
1213
1214                 err = obd_set_info_async(env, mdc->obd_self_export,
1215                                          keylen, key, vallen, val, set);
1216                 if (rc == 0)
1217                         rc = err;
1218         }
1219
1220         lov_tgts_putref(obd);
1221         if (no_set) {
1222                 err = ptlrpc_set_wait(env, set);
1223                 if (rc == 0)
1224                         rc = err;
1225                 ptlrpc_set_destroy(set);
1226         }
1227         RETURN(rc);
1228 }
1229
1230 void lov_stripe_lock(struct lov_stripe_md *md)
1231 __acquires(&md->lsm_lock)
1232 {
1233         LASSERT(md->lsm_lock_owner != current->pid);
1234         spin_lock(&md->lsm_lock);
1235         LASSERT(md->lsm_lock_owner == 0);
1236         md->lsm_lock_owner = current->pid;
1237 }
1238
1239 void lov_stripe_unlock(struct lov_stripe_md *md)
1240 __releases(&md->lsm_lock)
1241 {
1242         LASSERT(md->lsm_lock_owner == current->pid);
1243         md->lsm_lock_owner = 0;
1244         spin_unlock(&md->lsm_lock);
1245 }
1246
1247 static int lov_quotactl(struct obd_device *obd, struct obd_export *exp,
1248                         struct obd_quotactl *oqctl)
1249 {
1250         struct lov_obd *lov = &obd->u.lov;
1251         struct lov_tgt_desc *tgt;
1252         struct pool_desc *pool = NULL;
1253         __u64 curspace = 0;
1254         __u64 bhardlimit = 0;
1255         int i, rc = 0;
1256
1257         ENTRY;
1258         if (oqctl->qc_cmd != Q_GETOQUOTA &&
1259             oqctl->qc_cmd != LUSTRE_Q_SETQUOTA &&
1260             oqctl->qc_cmd != LUSTRE_Q_GETQUOTAPOOL) {
1261                 rc = -EFAULT;
1262                 CERROR("%s: bad quota opc %x for lov obd: rc = %d\n",
1263                        obd->obd_name, oqctl->qc_cmd, rc);
1264                 RETURN(rc);
1265         }
1266
1267         if (oqctl->qc_cmd == LUSTRE_Q_GETQUOTAPOOL) {
1268                 pool = lov_pool_find(obd, oqctl->qc_poolname);
1269                 if (!pool)
1270                         RETURN(-ENOENT);
1271                 /* Set Q_GETOQUOTA back as targets report it's own
1272                  * usage and doesn't care about pools */
1273                 oqctl->qc_cmd = Q_GETOQUOTA;
1274         }
1275
1276         /* for lov tgt */
1277         lov_tgts_getref(obd);
1278         for (i = 0; i < lov->desc.ld_tgt_count; i++) {
1279                 int err;
1280
1281                 tgt = lov->lov_tgts[i];
1282
1283                 if (!tgt)
1284                         continue;
1285
1286                 if (pool &&
1287                     lu_tgt_check_index(tgt->ltd_index, &pool->pool_obds))
1288                         continue;
1289
1290                 if (!tgt->ltd_active || tgt->ltd_reap) {
1291                         if (oqctl->qc_cmd == Q_GETOQUOTA &&
1292                             lov->lov_tgts[i]->ltd_activate) {
1293                                 rc = -ENETDOWN;
1294                                 CERROR("%s: ost %d is inactive: rc = %d\n",
1295                                        obd->obd_name, i, rc);
1296                         } else {
1297                                 CDEBUG(D_HA, "ost %d is inactive\n", i);
1298                         }
1299                         continue;
1300                 }
1301
1302                 err = obd_quotactl(tgt->ltd_exp, oqctl);
1303                 if (err) {
1304                         if (tgt->ltd_active && !rc)
1305                                 rc = err;
1306                         continue;
1307                 }
1308
1309                 if (oqctl->qc_cmd == Q_GETOQUOTA) {
1310                         curspace += oqctl->qc_dqblk.dqb_curspace;
1311                         bhardlimit += oqctl->qc_dqblk.dqb_bhardlimit;
1312                 }
1313         }
1314         lov_tgts_putref(obd);
1315         if (pool)
1316                 lov_pool_putref(pool);
1317
1318         if (oqctl->qc_cmd == Q_GETOQUOTA) {
1319                 oqctl->qc_dqblk.dqb_curspace = curspace;
1320                 oqctl->qc_dqblk.dqb_bhardlimit = bhardlimit;
1321         }
1322         RETURN(rc);
1323 }
1324
1325 static const struct obd_ops lov_obd_ops = {
1326         .o_owner                = THIS_MODULE,
1327         .o_setup                = lov_setup,
1328         .o_cleanup              = lov_cleanup,
1329         .o_connect              = lov_connect,
1330         .o_disconnect           = lov_disconnect,
1331         .o_statfs               = lov_statfs,
1332         .o_iocontrol            = lov_iocontrol,
1333         .o_get_info             = lov_get_info,
1334         .o_set_info_async       = lov_set_info_async,
1335         .o_notify               = lov_notify,
1336         .o_pool_new             = lov_pool_new,
1337         .o_pool_rem             = lov_pool_remove,
1338         .o_pool_add             = lov_pool_add,
1339         .o_pool_del             = lov_pool_del,
1340         .o_quotactl             = lov_quotactl,
1341 };
1342
1343 struct kmem_cache *lov_oinfo_slab;
1344
1345 static int __init lov_init(void)
1346 {
1347         int rc;
1348         ENTRY;
1349
1350         /* print an address of _any_ initialized kernel symbol from this
1351          * module, to allow debugging with gdb that doesn't support data
1352          * symbols from modules.*/
1353         CDEBUG(D_INFO, "Lustre LOV module (%p).\n", &lov_caches);
1354
1355         rc = lu_kmem_init(lov_caches);
1356         if (rc)
1357                 return rc;
1358
1359         lov_oinfo_slab = kmem_cache_create("lov_oinfo",
1360                                            sizeof(struct lov_oinfo), 0,
1361                                            SLAB_HWCACHE_ALIGN, NULL);
1362         if (lov_oinfo_slab == NULL) {
1363                 lu_kmem_fini(lov_caches);
1364                 return -ENOMEM;
1365         }
1366
1367         rc = class_register_type(&lov_obd_ops, NULL, true,
1368                                  LUSTRE_LOV_NAME, &lov_device_type);
1369         if (rc) {
1370                 kmem_cache_destroy(lov_oinfo_slab);
1371                 lu_kmem_fini(lov_caches);
1372         }
1373
1374         RETURN(rc);
1375 }
1376
1377 static void __exit lov_exit(void)
1378 {
1379         class_unregister_type(LUSTRE_LOV_NAME);
1380         kmem_cache_destroy(lov_oinfo_slab);
1381         lu_kmem_fini(lov_caches);
1382 }
1383
1384 MODULE_AUTHOR("OpenSFS, Inc. <http://www.lustre.org/>");
1385 MODULE_DESCRIPTION("Lustre Logical Object Volume");
1386 MODULE_VERSION(LUSTRE_VERSION_STRING);
1387 MODULE_LICENSE("GPL");
1388
1389 module_init(lov_init);
1390 module_exit(lov_exit);