lustre/lov/lov_obd.c

   1 /*
   2  * GPL HEADER START
   3  *
   4  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License version 2 only,
   8  * as published by the Free Software Foundation.
   9  *
  10  * This program is distributed in the hope that it will be useful, but
  11  * WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13  * General Public License version 2 for more details (a copy is included
  14  * in the LICENSE file that accompanied this code).
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * version 2 along with this program; If not, see
  18  * http://www.gnu.org/licenses/gpl-2.0.html
  19  *
  20  * GPL HEADER END
  21  */
  22 /*
  23  * Copyright (c) 2002, 2010, Oracle and/or its affiliates. All rights reserved.
  24  * Use is subject to license terms.
  25  *
  26  * Copyright (c) 2011, 2017, Intel Corporation.
  27  */
  28 /*
  29  * This file is part of Lustre, http://www.lustre.org/
  30  * Lustre is a trademark of Sun Microsystems, Inc.
  31  *
  32  * lustre/lov/lov_obd.c
  33  *
  34  * Author: Phil Schwan <phil@clusterfs.com>
  35  * Author: Peter Braam <braam@clusterfs.com>
  36  * Author: Mike Shaver <shaver@clusterfs.com>
  37  * Author: Nathan Rutman <nathan@clusterfs.com>
  38  */
  39
  40 #define DEBUG_SUBSYSTEM S_LOV
  41 #include <libcfs/libcfs.h>
  42
  43 #include <cl_object.h>
  44 #include <lustre_dlm.h>
  45 #include <lustre_fid.h>
  46 #include <uapi/linux/lustre/lustre_ioctl.h>
  47 #include <lustre_lib.h>
  48 #include <lustre_mds.h>
  49 #include <lustre_net.h>
  50 #include <uapi/linux/lustre/lustre_param.h>
  51 #include <lustre_swab.h>
  52 #include <lprocfs_status.h>
  53 #include <obd_class.h>
  54 #include <obd_support.h>
  55
  56 #include "lov_internal.h"
  57
  58 /* Keep a refcount of lov->tgt usage to prevent racing with addition/deletion.
  59    Any function that expects lov_tgts to remain stationary must take a ref. */
  60 static void lov_getref(struct obd_device *obd)
  61 {
  62         struct lov_obd *lov = &obd->u.lov;
  63
  64         /* nobody gets through here until lov_putref is done */
  65         mutex_lock(&lov->lov_lock);
  66         atomic_inc(&lov->lov_refcount);
  67         mutex_unlock(&lov->lov_lock);
  68         return;
  69 }
  70
  71 static void __lov_del_obd(struct obd_device *obd, struct lov_tgt_desc *tgt);
  72
  73 static void lov_putref(struct obd_device *obd)
  74 {
  75         struct lov_obd *lov = &obd->u.lov;
  76
  77         mutex_lock(&lov->lov_lock);
  78         /* ok to dec to 0 more than once -- ltd_exp's will be null */
  79         if (atomic_dec_and_test(&lov->lov_refcount) && lov->lov_death_row) {
  80                 struct list_head kill = LIST_HEAD_INIT(kill);
  81                 struct lov_tgt_desc *tgt, *n;
  82                 int i;
  83
  84                 CDEBUG(D_CONFIG, "destroying %d lov targets\n",
  85                        lov->lov_death_row);
  86                 for (i = 0; i < lov->desc.ld_tgt_count; i++) {
  87                         tgt = lov->lov_tgts[i];
  88
  89                         if (!tgt || !tgt->ltd_reap)
  90                                 continue;
  91                         list_add(&tgt->ltd_kill, &kill);
  92                         /* XXX - right now there is a dependency on ld_tgt_count
  93                          * being the maximum tgt index for computing the
  94                          * mds_max_easize. So we can't shrink it. */
  95                         lov_ost_pool_remove(&lov->lov_packed, i);
  96                         lov->lov_tgts[i] = NULL;
  97                         lov->lov_death_row--;
  98                 }
  99                 mutex_unlock(&lov->lov_lock);
 100
 101                 list_for_each_entry_safe(tgt, n, &kill, ltd_kill) {
 102                         list_del(&tgt->ltd_kill);
 103                         /* Disconnect */
 104                         __lov_del_obd(obd, tgt);
 105                 }
 106
 107                 if (lov->lov_tgts_kobj)
 108                         kobject_put(lov->lov_tgts_kobj);
 109
 110         } else {
 111                 mutex_unlock(&lov->lov_lock);
 112         }
 113 }
 114
 115 static int lov_set_osc_active(struct obd_device *obd, struct obd_uuid *uuid,
 116                               enum obd_notify_event ev);
 117 static int lov_notify(struct obd_device *obd, struct obd_device *watched,
 118                       enum obd_notify_event ev);
 119
 120 int lov_connect_obd(struct obd_device *obd, u32 index, int activate,
 121                     struct obd_connect_data *data)
 122 {
 123         struct lov_obd *lov = &obd->u.lov;
 124         struct obd_uuid *tgt_uuid;
 125         struct obd_device *tgt_obd;
 126         static struct obd_uuid lov_osc_uuid = { "LOV_OSC_UUID" };
 127         struct obd_import *imp;
 128         int rc;
 129         ENTRY;
 130
 131         if (lov->lov_tgts[index] == NULL)
 132                 RETURN(-EINVAL);
 133
 134         tgt_uuid = &lov->lov_tgts[index]->ltd_uuid;
 135         tgt_obd = lov->lov_tgts[index]->ltd_obd;
 136
 137         if (!tgt_obd->obd_set_up) {
 138                 CERROR("Target %s not set up\n", obd_uuid2str(tgt_uuid));
 139                 RETURN(-EINVAL);
 140         }
 141
 142         /* override the sp_me from lov */
 143         tgt_obd->u.cli.cl_sp_me = lov->lov_sp_me;
 144
 145         if (data && (data->ocd_connect_flags & OBD_CONNECT_INDEX))
 146                 data->ocd_index = index;
 147
 148         /*
 149          * Divine LOV knows that OBDs under it are OSCs.
 150          */
 151         imp = tgt_obd->u.cli.cl_import;
 152
 153         if (activate) {
 154                 tgt_obd->obd_no_recov = 0;
 155                 /* FIXME this is probably supposed to be
 156                    ptlrpc_set_import_active.  Horrible naming. */
 157                 ptlrpc_activate_import(imp);
 158         }
 159
 160         rc = obd_register_observer(tgt_obd, obd);
 161         if (rc) {
 162                 CERROR("Target %s register_observer error %d\n",
 163                        obd_uuid2str(tgt_uuid), rc);
 164                 RETURN(rc);
 165         }
 166
 167
 168         if (imp->imp_invalid) {
 169                 CDEBUG(D_CONFIG, "not connecting OSC %s; administratively "
 170                        "disabled\n", obd_uuid2str(tgt_uuid));
 171                 RETURN(0);
 172         }
 173
 174         rc = obd_connect(NULL, &lov->lov_tgts[index]->ltd_exp, tgt_obd,
 175                          &lov_osc_uuid, data, NULL);
 176         if (rc || !lov->lov_tgts[index]->ltd_exp) {
 177                 CERROR("Target %s connect error %d\n",
 178                        obd_uuid2str(tgt_uuid), rc);
 179                 RETURN(-ENODEV);
 180         }
 181
 182         lov->lov_tgts[index]->ltd_reap = 0;
 183
 184         CDEBUG(D_CONFIG, "Connected tgt idx %d %s (%s) %sactive\n", index,
 185                obd_uuid2str(tgt_uuid), tgt_obd->obd_name, activate ? "":"in");
 186
 187         if (lov->lov_tgts_kobj) {
 188                 /* Even if we failed, that's ok */
 189                 rc = sysfs_create_link(lov->lov_tgts_kobj,
 190                                        &tgt_obd->obd_kset.kobj,
 191                                        tgt_obd->obd_name);
 192                 if (rc) {
 193                         CERROR("%s: can't register LOV target /sys/fs/lustre/%s/%s/target_obds/%s : rc = %d\n",
 194                                obd->obd_name, obd->obd_type->typ_name,
 195                                obd->obd_name,
 196                                lov->lov_tgts[index]->ltd_exp->exp_obd->obd_name,
 197                                rc);
 198                 }
 199         }
 200         RETURN(0);
 201 }
 202
 203 static int lov_connect(const struct lu_env *env,
 204                        struct obd_export **exp, struct obd_device *obd,
 205                        struct obd_uuid *cluuid, struct obd_connect_data *data,
 206                        void *localdata)
 207 {
 208         struct lov_obd *lov = &obd->u.lov;
 209         struct lov_tgt_desc *tgt;
 210         struct lustre_handle conn;
 211         int i, rc;
 212         ENTRY;
 213
 214         CDEBUG(D_CONFIG, "connect #%d\n", lov->lov_connects);
 215
 216         rc = class_connect(&conn, obd, cluuid);
 217         if (rc)
 218                 RETURN(rc);
 219
 220         *exp = class_conn2export(&conn);
 221
 222         /* Why should there ever be more than 1 connect? */
 223         lov->lov_connects++;
 224         LASSERT(lov->lov_connects == 1);
 225
 226         memset(&lov->lov_ocd, 0, sizeof(lov->lov_ocd));
 227         if (data)
 228                 lov->lov_ocd = *data;
 229
 230         obd_getref(obd);
 231
 232         lov->lov_tgts_kobj = kobject_create_and_add("target_obds",
 233                                                     &obd->obd_kset.kobj);
 234
 235         for (i = 0; i < lov->desc.ld_tgt_count; i++) {
 236                 tgt = lov->lov_tgts[i];
 237                 if (!tgt || obd_uuid_empty(&tgt->ltd_uuid))
 238                         continue;
 239                 /* Flags will be lowest common denominator */
 240                 rc = lov_connect_obd(obd, i, tgt->ltd_activate, &lov->lov_ocd);
 241                 if (rc) {
 242                         CERROR("%s: lov connect tgt %d failed: %d\n",
 243                                obd->obd_name, i, rc);
 244                         continue;
 245                 }
 246                 /* connect to administrative disabled ost */
 247                 if (!lov->lov_tgts[i]->ltd_exp)
 248                         continue;
 249
 250                 rc = lov_notify(obd, lov->lov_tgts[i]->ltd_exp->exp_obd,
 251                                 OBD_NOTIFY_CONNECT);
 252                 if (rc) {
 253                         CERROR("%s error sending notify %d\n",
 254                                obd->obd_name, rc);
 255                 }
 256         }
 257         obd_putref(obd);
 258
 259         RETURN(0);
 260 }
 261
 262 static int lov_disconnect_obd(struct obd_device *obd, struct lov_tgt_desc *tgt)
 263 {
 264         struct lov_obd *lov = &obd->u.lov;
 265         struct obd_device *osc_obd;
 266         int rc;
 267         ENTRY;
 268
 269         osc_obd = class_exp2obd(tgt->ltd_exp);
 270         CDEBUG(D_CONFIG, "%s: disconnecting target %s\n",
 271                obd->obd_name, osc_obd->obd_name);
 272
 273         if (tgt->ltd_active) {
 274                 tgt->ltd_active = 0;
 275                 lov->desc.ld_active_tgt_count--;
 276                 tgt->ltd_exp->exp_obd->obd_inactive = 1;
 277         }
 278
 279         if (osc_obd) {
 280                 if (lov->lov_tgts_kobj)
 281                         sysfs_remove_link(lov->lov_tgts_kobj,
 282                                           osc_obd->obd_name);
 283
 284                 /* Pass it on to our clients.
 285                  * XXX This should be an argument to disconnect,
 286                  * XXX not a back-door flag on the OBD.  Ah well.
 287                  */
 288                 osc_obd->obd_force = obd->obd_force;
 289                 osc_obd->obd_fail = obd->obd_fail;
 290                 osc_obd->obd_no_recov = obd->obd_no_recov;
 291
 292                 if (lov->targets_proc_entry != NULL)
 293                         lprocfs_remove_proc_entry(osc_obd->obd_name,
 294                                                   lov->targets_proc_entry);
 295         }
 296
 297         obd_register_observer(osc_obd, NULL);
 298
 299         rc = obd_disconnect(tgt->ltd_exp);
 300         if (rc) {
 301                 CERROR("Target %s disconnect error %d\n",
 302                        tgt->ltd_uuid.uuid, rc);
 303                 rc = 0;
 304         }
 305
 306         tgt->ltd_exp = NULL;
 307         RETURN(0);
 308 }
 309
 310 static int lov_disconnect(struct obd_export *exp)
 311 {
 312         struct obd_device *obd = class_exp2obd(exp);
 313         struct lov_obd *lov = &obd->u.lov;
 314         u32 index;
 315         int rc;
 316
 317         ENTRY;
 318         if (!lov->lov_tgts)
 319                 goto out;
 320
 321         /* Only disconnect the underlying layers on the final disconnect. */
 322         lov->lov_connects--;
 323         if (lov->lov_connects != 0) {
 324                 /* why should there be more than 1 connect? */
 325                 CWARN("%s: unexpected disconnect #%d\n",
 326                       obd->obd_name, lov->lov_connects);
 327                 goto out;
 328         }
 329
 330         /* hold another ref so lov_del_obd() doesn't spin in putref each time */
 331         obd_getref(obd);
 332
 333         for (index = 0; index < lov->desc.ld_tgt_count; index++) {
 334                 if (lov->lov_tgts[index] && lov->lov_tgts[index]->ltd_exp) {
 335                         /* Disconnection is the last we know about an OBD */
 336                         lov_del_target(obd, index, NULL,
 337                                        lov->lov_tgts[index]->ltd_gen);
 338                 }
 339         }
 340         obd_putref(obd);
 341
 342 out:
 343         rc = class_disconnect(exp); /* bz 9811 */
 344         RETURN(rc);
 345 }
 346
 347 /* Error codes:
 348  *
 349  *  -EINVAL  : UUID can't be found in the LOV's target list
 350  *  -ENOTCONN: The UUID is found, but the target connection is bad (!)
 351  *  -EBADF   : The UUID is found, but the OBD is the wrong type (!)
 352  *  any >= 0 : is log target index
 353  */
 354 static int lov_set_osc_active(struct obd_device *obd, struct obd_uuid *uuid,
 355                               enum obd_notify_event ev)
 356 {
 357         struct lov_obd *lov = &obd->u.lov;
 358         struct lov_tgt_desc *tgt;
 359         int index, activate, active;
 360         ENTRY;
 361
 362         CDEBUG(D_INFO, "Searching in lov %p for uuid %s event(%d)\n",
 363                lov, uuid->uuid, ev);
 364
 365         obd_getref(obd);
 366         for (index = 0; index < lov->desc.ld_tgt_count; index++) {
 367                 tgt = lov->lov_tgts[index];
 368                 if (!tgt)
 369                         continue;
 370                 /*
 371                  * LU-642, initially inactive OSC could miss the obd_connect,
 372                  * we make up for it here.
 373                  */
 374                 if (ev == OBD_NOTIFY_ACTIVATE && tgt->ltd_exp == NULL &&
 375                     obd_uuid_equals(uuid, &tgt->ltd_uuid)) {
 376                         struct obd_uuid lov_osc_uuid = {"LOV_OSC_UUID"};
 377
 378                         obd_connect(NULL, &tgt->ltd_exp, tgt->ltd_obd,
 379                                     &lov_osc_uuid, &lov->lov_ocd, NULL);
 380                 }
 381                 if (!tgt->ltd_exp)
 382                         continue;
 383
 384                 CDEBUG(D_INFO, "lov idx %d is %s conn %#llx\n",
 385                        index, obd_uuid2str(&tgt->ltd_uuid),
 386                        tgt->ltd_exp->exp_handle.h_cookie);
 387                 if (obd_uuid_equals(uuid, &tgt->ltd_uuid))
 388                         break;
 389         }
 390
 391         if (index == lov->desc.ld_tgt_count)
 392                 GOTO(out, index = -EINVAL);
 393
 394         if (ev == OBD_NOTIFY_DEACTIVATE || ev == OBD_NOTIFY_ACTIVATE) {
 395                 activate = (ev == OBD_NOTIFY_ACTIVATE) ? 1 : 0;
 396
 397                 if (lov->lov_tgts[index]->ltd_activate == activate) {
 398                         CDEBUG(D_INFO, "OSC %s already %sactivate!\n",
 399                                uuid->uuid, activate ? "" : "de");
 400                 } else {
 401                         lov->lov_tgts[index]->ltd_activate = activate;
 402                         CDEBUG(D_CONFIG, "%sactivate OSC %s\n",
 403                                activate ? "" : "de", obd_uuid2str(uuid));
 404                 }
 405
 406         } else if (ev == OBD_NOTIFY_INACTIVE || ev == OBD_NOTIFY_ACTIVE) {
 407                 active = (ev == OBD_NOTIFY_ACTIVE) ? 1 : 0;
 408
 409                 if (lov->lov_tgts[index]->ltd_active == active) {
 410                         CDEBUG(D_INFO, "OSC %s already %sactive!\n",
 411                                uuid->uuid, active ? "" : "in");
 412                         GOTO(out, index);
 413                 } else {
 414                         CDEBUG(D_CONFIG, "Marking OSC %s %sactive\n",
 415                                obd_uuid2str(uuid), active ? "" : "in");
 416                 }
 417
 418                 lov->lov_tgts[index]->ltd_active = active;
 419                 if (active) {
 420                         lov->desc.ld_active_tgt_count++;
 421                         lov->lov_tgts[index]->ltd_exp->exp_obd->obd_inactive = 0;
 422                 } else {
 423                         lov->desc.ld_active_tgt_count--;
 424                         lov->lov_tgts[index]->ltd_exp->exp_obd->obd_inactive = 1;
 425                 }
 426         } else {
 427                 CERROR("%s: unknown event %d for uuid %s\n", obd->obd_name,
 428                        ev, uuid->uuid);
 429         }
 430
 431  out:
 432         obd_putref(obd);
 433         RETURN(index);
 434 }
 435
 436 static int lov_notify(struct obd_device *obd, struct obd_device *watched,
 437                       enum obd_notify_event ev)
 438 {
 439         int rc = 0;
 440         struct lov_obd *lov = &obd->u.lov;
 441         ENTRY;
 442
 443         down_read(&lov->lov_notify_lock);
 444         if (!lov->lov_connects)
 445                 GOTO(out_notify_lock, rc = 0);
 446
 447         if (ev == OBD_NOTIFY_ACTIVE || ev == OBD_NOTIFY_INACTIVE ||
 448             ev == OBD_NOTIFY_ACTIVATE || ev == OBD_NOTIFY_DEACTIVATE) {
 449                 struct obd_uuid *uuid;
 450
 451                 LASSERT(watched);
 452
 453                 if (strcmp(watched->obd_type->typ_name, LUSTRE_OSC_NAME)) {
 454                         CERROR("unexpected notification of %s %s\n",
 455                                watched->obd_type->typ_name, watched->obd_name);
 456                         GOTO(out_notify_lock, rc = -EINVAL);
 457                 }
 458
 459                 uuid = &watched->u.cli.cl_target_uuid;
 460
 461                 /* Set OSC as active before notifying the observer, so the
 462                  * observer can use the OSC normally.
 463                  */
 464                 rc = lov_set_osc_active(obd, uuid, ev);
 465                 if (rc < 0) {
 466                         CERROR("%s: event %d failed: rc = %d\n", obd->obd_name,
 467                                ev, rc);
 468                         GOTO(out_notify_lock, rc);
 469                 }
 470         }
 471
 472         /* Pass the notification up the chain. */
 473         rc = obd_notify_observer(obd, watched, ev);
 474
 475 out_notify_lock:
 476         up_read(&lov->lov_notify_lock);
 477
 478         RETURN(rc);
 479 }
 480
 481 static int lov_add_target(struct obd_device *obd, struct obd_uuid *uuidp,
 482                           u32 index, int gen, int active)
 483 {
 484         struct lov_obd *lov = &obd->u.lov;
 485         struct lov_tgt_desc *tgt;
 486         struct obd_device *tgt_obd;
 487         int rc;
 488
 489         ENTRY;
 490         CDEBUG(D_CONFIG, "uuid:%s idx:%u gen:%d active:%d\n",
 491                uuidp->uuid, index, gen, active);
 492
 493         if (gen <= 0) {
 494                 CERROR("%s: request to add '%s' with invalid generation: %d\n",
 495                        obd->obd_name, uuidp->uuid, gen);
 496                 RETURN(-EINVAL);
 497         }
 498
 499         tgt_obd = class_find_client_obd(uuidp, LUSTRE_OSC_NAME, &obd->obd_uuid);
 500         if (tgt_obd == NULL)
 501                 RETURN(-EINVAL);
 502
 503         mutex_lock(&lov->lov_lock);
 504
 505         if ((index < lov->lov_tgt_size) && (lov->lov_tgts[index] != NULL)) {
 506                 tgt = lov->lov_tgts[index];
 507                 rc = -EEXIST;
 508                 CERROR("%s: UUID %s already assigned at index %d: rc = %d\n",
 509                        obd->obd_name, obd_uuid2str(&tgt->ltd_uuid), index, rc);
 510                 mutex_unlock(&lov->lov_lock);
 511                 RETURN(rc);
 512         }
 513
 514         if (index >= lov->lov_tgt_size) {
 515                 /* We need to reallocate the lov target array. */
 516                 struct lov_tgt_desc **newtgts, **old = NULL;
 517                 __u32 newsize, oldsize = 0;
 518
 519                 newsize = max(lov->lov_tgt_size, (__u32)2);
 520                 while (newsize < index + 1)
 521                         newsize = newsize << 1;
 522                 OBD_ALLOC(newtgts, sizeof(*newtgts) * newsize);
 523                 if (newtgts == NULL) {
 524                         mutex_unlock(&lov->lov_lock);
 525                         RETURN(-ENOMEM);
 526                 }
 527
 528                 if (lov->lov_tgt_size) {
 529                         memcpy(newtgts, lov->lov_tgts, sizeof(*newtgts) *
 530                                lov->lov_tgt_size);
 531                         old = lov->lov_tgts;
 532                         oldsize = lov->lov_tgt_size;
 533                 }
 534
 535                 lov->lov_tgts = newtgts;
 536                 lov->lov_tgt_size = newsize;
 537                 smp_rmb();
 538                 if (old)
 539                         OBD_FREE(old, sizeof(*old) * oldsize);
 540
 541                 CDEBUG(D_CONFIG, "tgts: %p size: %d\n",
 542                        lov->lov_tgts, lov->lov_tgt_size);
 543         }
 544
 545         OBD_ALLOC_PTR(tgt);
 546         if (!tgt) {
 547                 mutex_unlock(&lov->lov_lock);
 548                 RETURN(-ENOMEM);
 549         }
 550
 551         rc = lov_ost_pool_add(&lov->lov_packed, index, lov->lov_tgt_size);
 552         if (rc) {
 553                 mutex_unlock(&lov->lov_lock);
 554                 OBD_FREE_PTR(tgt);
 555                 RETURN(rc);
 556         }
 557
 558         tgt->ltd_uuid = *uuidp;
 559         tgt->ltd_obd = tgt_obd;
 560         /* XXX - add a sanity check on the generation number. */
 561         tgt->ltd_gen = gen;
 562         tgt->ltd_index = index;
 563         tgt->ltd_activate = active;
 564         lov->lov_tgts[index] = tgt;
 565         if (index >= lov->desc.ld_tgt_count)
 566                 lov->desc.ld_tgt_count = index + 1;
 567
 568         mutex_unlock(&lov->lov_lock);
 569
 570         CDEBUG(D_CONFIG, "idx=%d ltd_gen=%d ld_tgt_count=%d\n",
 571                 index, tgt->ltd_gen, lov->desc.ld_tgt_count);
 572
 573         if (lov->lov_connects == 0) {
 574                 /* lov_connect hasn't been called yet. We'll do the
 575                    lov_connect_obd on this target when that fn first runs,
 576                    because we don't know the connect flags yet. */
 577                 RETURN(0);
 578         }
 579
 580         obd_getref(obd);
 581
 582         rc = lov_connect_obd(obd, index, active, &lov->lov_ocd);
 583         if (rc)
 584                 GOTO(out, rc);
 585
 586         /* connect to administrative disabled ost */
 587         if (!tgt->ltd_exp)
 588                 GOTO(out, rc = 0);
 589
 590         if (lov->lov_cache != NULL) {
 591                 rc = obd_set_info_async(NULL, tgt->ltd_exp,
 592                                 sizeof(KEY_CACHE_SET), KEY_CACHE_SET,
 593                                 sizeof(struct cl_client_cache), lov->lov_cache,
 594                                 NULL);
 595                 if (rc < 0)
 596                         GOTO(out, rc);
 597         }
 598
 599         rc = lov_notify(obd, tgt->ltd_exp->exp_obd,
 600                         active ? OBD_NOTIFY_CONNECT : OBD_NOTIFY_INACTIVE);
 601
 602 out:
 603         if (rc) {
 604                 CERROR("%s: add failed, deleting %s: rc = %d\n",
 605                        obd->obd_name, obd_uuid2str(&tgt->ltd_uuid), rc);
 606                 lov_del_target(obd, index, NULL, 0);
 607         }
 608         obd_putref(obd);
 609         RETURN(rc);
 610 }
 611
 612 /* Schedule a target for deletion */
 613 int lov_del_target(struct obd_device *obd, u32 index,
 614                    struct obd_uuid *uuidp, int gen)
 615 {
 616         struct lov_obd *lov = &obd->u.lov;
 617         int count = lov->desc.ld_tgt_count;
 618         int rc = 0;
 619         ENTRY;
 620
 621         if (index >= count) {
 622                 CERROR("LOV target index %d >= number of LOV OBDs %d.\n",
 623                        index, count);
 624                 RETURN(-EINVAL);
 625         }
 626
 627         /* to make sure there's no ongoing lov_notify() now */
 628         down_write(&lov->lov_notify_lock);
 629         obd_getref(obd);
 630
 631         if (!lov->lov_tgts[index]) {
 632                 CERROR("LOV target at index %d is not setup.\n", index);
 633                 GOTO(out, rc = -EINVAL);
 634         }
 635
 636         if (uuidp && !obd_uuid_equals(uuidp, &lov->lov_tgts[index]->ltd_uuid)) {
 637                 CERROR("LOV target UUID %s at index %d doesn't match %s.\n",
 638                        lov_uuid2str(lov, index), index,
 639                        obd_uuid2str(uuidp));
 640                 GOTO(out, rc = -EINVAL);
 641         }
 642
 643         CDEBUG(D_CONFIG, "uuid: %s idx: %d gen: %d exp: %p active: %d\n",
 644                lov_uuid2str(lov, index), index,
 645                lov->lov_tgts[index]->ltd_gen, lov->lov_tgts[index]->ltd_exp,
 646                lov->lov_tgts[index]->ltd_active);
 647
 648         lov->lov_tgts[index]->ltd_reap = 1;
 649         lov->lov_death_row++;
 650         /* we really delete it from obd_putref */
 651 out:
 652         obd_putref(obd);
 653         up_write(&lov->lov_notify_lock);
 654
 655         RETURN(rc);
 656 }
 657
 658 static void __lov_del_obd(struct obd_device *obd, struct lov_tgt_desc *tgt)
 659 {
 660         struct obd_device *osc_obd;
 661
 662         LASSERT(tgt);
 663         LASSERT(tgt->ltd_reap);
 664
 665         osc_obd = class_exp2obd(tgt->ltd_exp);
 666
 667         CDEBUG(D_CONFIG, "Removing tgt %s : %s\n",
 668                tgt->ltd_uuid.uuid,
 669                osc_obd ? osc_obd->obd_name : "<no obd>");
 670
 671         if (tgt->ltd_exp)
 672                 lov_disconnect_obd(obd, tgt);
 673
 674         OBD_FREE_PTR(tgt);
 675
 676         /* Manual cleanup - no cleanup logs to clean up the osc's.  We must
 677            do it ourselves. And we can't do it from lov_cleanup,
 678            because we just lost our only reference to it. */
 679         if (osc_obd)
 680                 class_manual_cleanup(osc_obd);
 681 }
 682
 683 void lov_fix_desc_stripe_size(__u64 *val)
 684 {
 685         if (*val < LOV_MIN_STRIPE_SIZE) {
 686                 if (*val != 0)
 687                         LCONSOLE_INFO("Increasing default stripe size to "
 688                                       "minimum %u\n",
 689                                       LOV_DESC_STRIPE_SIZE_DEFAULT);
 690                 *val = LOV_DESC_STRIPE_SIZE_DEFAULT;
 691         } else if (*val & (LOV_MIN_STRIPE_SIZE - 1)) {
 692                 *val &= ~(LOV_MIN_STRIPE_SIZE - 1);
 693                 LCONSOLE_WARN("Changing default stripe size to %llu (a "
 694                               "multiple of %u)\n",
 695                               *val, LOV_MIN_STRIPE_SIZE);
 696         }
 697 }
 698
 699 void lov_fix_desc_stripe_count(__u32 *val)
 700 {
 701         if (*val == 0)
 702                 *val = 1;
 703 }
 704
 705 void lov_fix_desc_pattern(__u32 *val)
 706 {
 707         /* from lov_setstripe */
 708         if ((*val != 0) && (*val != LOV_PATTERN_RAID0)) {
 709                 LCONSOLE_WARN("Unknown stripe pattern: %#x\n", *val);
 710                 *val = 0;
 711         }
 712 }
 713
 714 void lov_fix_desc_qos_maxage(__u32 *val)
 715 {
 716         if (*val == 0)
 717                 *val = LOV_DESC_QOS_MAXAGE_DEFAULT;
 718 }
 719
 720 void lov_fix_desc(struct lov_desc *desc)
 721 {
 722         lov_fix_desc_stripe_size(&desc->ld_default_stripe_size);
 723         lov_fix_desc_stripe_count(&desc->ld_default_stripe_count);
 724         lov_fix_desc_pattern(&desc->ld_pattern);
 725         lov_fix_desc_qos_maxage(&desc->ld_qos_maxage);
 726 }
 727
 728 int lov_setup(struct obd_device *obd, struct lustre_cfg *lcfg)
 729 {
 730         struct lov_desc *desc;
 731         struct lov_obd *lov = &obd->u.lov;
 732         int rc;
 733         ENTRY;
 734
 735         if (LUSTRE_CFG_BUFLEN(lcfg, 1) < 1) {
 736                 CERROR("LOV setup requires a descriptor\n");
 737                 RETURN(-EINVAL);
 738         }
 739
 740         desc = (struct lov_desc *)lustre_cfg_buf(lcfg, 1);
 741
 742         if (sizeof(*desc) > LUSTRE_CFG_BUFLEN(lcfg, 1)) {
 743                 CERROR("descriptor size wrong: %d > %d\n",
 744                        (int)sizeof(*desc), LUSTRE_CFG_BUFLEN(lcfg, 1));
 745                 RETURN(-EINVAL);
 746         }
 747
 748         if (desc->ld_magic != LOV_DESC_MAGIC) {
 749                 if (desc->ld_magic == __swab32(LOV_DESC_MAGIC)) {
 750                             CDEBUG(D_OTHER, "%s: Swabbing lov desc %p\n",
 751                                    obd->obd_name, desc);
 752                             lustre_swab_lov_desc(desc);
 753                 } else {
 754                         CERROR("%s: Bad lov desc magic: %#x\n",
 755                                obd->obd_name, desc->ld_magic);
 756                         RETURN(-EINVAL);
 757                 }
 758         }
 759
 760         lov_fix_desc(desc);
 761
 762         desc->ld_active_tgt_count = 0;
 763         lov->desc = *desc;
 764         lov->lov_tgt_size = 0;
 765
 766         mutex_init(&lov->lov_lock);
 767         atomic_set(&lov->lov_refcount, 0);
 768         lov->lov_sp_me = LUSTRE_SP_CLI;
 769
 770         init_rwsem(&lov->lov_notify_lock);
 771
 772         lov->lov_pools_hash_body = cfs_hash_create("POOLS", HASH_POOLS_CUR_BITS,
 773                                                    HASH_POOLS_MAX_BITS,
 774                                                    HASH_POOLS_BKT_BITS, 0,
 775                                                    CFS_HASH_MIN_THETA,
 776                                                    CFS_HASH_MAX_THETA,
 777                                                    &pool_hash_operations,
 778                                                    CFS_HASH_DEFAULT);
 779         INIT_LIST_HEAD(&lov->lov_pool_list);
 780         lov->lov_pool_count = 0;
 781         rc = lov_ost_pool_init(&lov->lov_packed, 0);
 782         if (rc)
 783                 GOTO(out, rc);
 784
 785         rc = lov_tunables_init(obd);
 786 out:
 787         return rc;
 788 }
 789
 790 static int lov_cleanup(struct obd_device *obd)
 791 {
 792         struct lov_obd *lov = &obd->u.lov;
 793         struct list_head *pos, *tmp;
 794         struct pool_desc *pool;
 795         ENTRY;
 796
 797         list_for_each_safe(pos, tmp, &lov->lov_pool_list) {
 798                 pool = list_entry(pos, struct pool_desc, pool_list);
 799                 /* free pool structs */
 800                 CDEBUG(D_INFO, "delete pool %p\n", pool);
 801                 /* In the function below, .hs_keycmp resolves to
 802                  * pool_hashkey_keycmp() */
 803                 /* coverity[overrun-buffer-val] */
 804                 lov_pool_del(obd, pool->pool_name);
 805         }
 806         cfs_hash_putref(lov->lov_pools_hash_body);
 807         lov_ost_pool_free(&lov->lov_packed);
 808
 809         lprocfs_obd_cleanup(obd);
 810         if (lov->lov_tgts) {
 811                 int i;
 812                 obd_getref(obd);
 813                 for (i = 0; i < lov->desc.ld_tgt_count; i++) {
 814                         if (!lov->lov_tgts[i])
 815                                 continue;
 816
 817                         /* Inactive targets may never have connected */
 818                         if (lov->lov_tgts[i]->ltd_active ||
 819                             atomic_read(&lov->lov_refcount))
 820                                 /* We should never get here - these
 821                                  * should have been removed in the
 822                                  * disconnect. */
 823                                 CERROR("%s: lov tgt %d not cleaned! "
 824                                        "deathrow=%d, lovrc=%d\n",
 825                                        obd->obd_name, i, lov->lov_death_row,
 826                                        atomic_read(&lov->lov_refcount));
 827                         lov_del_target(obd, i, NULL, 0);
 828                 }
 829                 obd_putref(obd);
 830                 OBD_FREE(lov->lov_tgts, sizeof(*lov->lov_tgts) *
 831                          lov->lov_tgt_size);
 832                 lov->lov_tgt_size = 0;
 833         }
 834
 835         if (lov->lov_cache != NULL) {
 836                 cl_cache_decref(lov->lov_cache);
 837                 lov->lov_cache = NULL;
 838         }
 839
 840         RETURN(0);
 841 }
 842
 843 int lov_process_config_base(struct obd_device *obd, struct lustre_cfg *lcfg,
 844                             u32 *indexp, int *genp)
 845 {
 846         struct obd_uuid obd_uuid;
 847         int cmd;
 848         int rc = 0;
 849
 850         ENTRY;
 851         switch (cmd = lcfg->lcfg_command) {
 852         case LCFG_ADD_MDC:
 853         case LCFG_DEL_MDC:
 854                 break;
 855         case LCFG_LOV_ADD_OBD:
 856         case LCFG_LOV_ADD_INA:
 857         case LCFG_LOV_DEL_OBD: {
 858                 u32 index;
 859                 int gen;
 860
 861                 /* lov_modify_tgts add  0:lov_mdsA  1:ost1_UUID  2:0  3:1 */
 862                 if (LUSTRE_CFG_BUFLEN(lcfg, 1) > sizeof(obd_uuid.uuid))
 863                         GOTO(out, rc = -EINVAL);
 864
 865                 obd_str2uuid(&obd_uuid,  lustre_cfg_buf(lcfg, 1));
 866
 867                 rc = kstrtou32(lustre_cfg_buf(lcfg, 2), 10, indexp);
 868                 if (rc)
 869                         GOTO(out, rc);
 870                 rc = kstrtoint(lustre_cfg_buf(lcfg, 3), 10, genp);
 871                 if (rc)
 872                         GOTO(out, rc);
 873                 index = *indexp;
 874                 gen = *genp;
 875                 if (cmd == LCFG_LOV_ADD_OBD)
 876                         rc = lov_add_target(obd, &obd_uuid, index, gen, 1);
 877                 else if (cmd == LCFG_LOV_ADD_INA)
 878                         rc = lov_add_target(obd, &obd_uuid, index, gen, 0);
 879                 else
 880                         rc = lov_del_target(obd, index, &obd_uuid, gen);
 881
 882                 GOTO(out, rc);
 883         }
 884         case LCFG_PARAM: {
 885                 struct lov_desc *desc = &(obd->u.lov.desc);
 886                 ssize_t count;
 887
 888                 if (!desc)
 889                         GOTO(out, rc = -EINVAL);
 890
 891                 count = class_modify_config(lcfg, PARAM_LOV,
 892                                             &obd->obd_kset.kobj);
 893                 GOTO(out, rc = count < 0 ? count : 0);
 894         }
 895         case LCFG_POOL_NEW:
 896         case LCFG_POOL_ADD:
 897         case LCFG_POOL_DEL:
 898         case LCFG_POOL_REM:
 899                 GOTO(out, rc);
 900
 901         default: {
 902                 CERROR("Unknown command: %d\n", lcfg->lcfg_command);
 903                 GOTO(out, rc = -EINVAL);
 904
 905         }
 906         }
 907 out:
 908         RETURN(rc);
 909 }
 910
 911 static int lov_statfs(const struct lu_env *env, struct obd_export *exp,
 912                       struct obd_statfs *osfs, time64_t max_age, __u32 flags)
 913 {
 914         struct obd_device *obd = class_exp2obd(exp);
 915         struct lov_obd *lov = &obd->u.lov;
 916         struct obd_info oinfo = {
 917                 .oi_osfs = osfs,
 918                 .oi_flags = flags,
 919         };
 920         struct ptlrpc_request_set *rqset;
 921         struct lov_request_set *set = NULL;
 922         struct lov_request *req;
 923         int rc = 0;
 924         int rc2;
 925
 926         ENTRY;
 927
 928         rqset = ptlrpc_prep_set();
 929         if (rqset == NULL)
 930                 RETURN(-ENOMEM);
 931
 932         rc = lov_prep_statfs_set(obd, &oinfo, &set);
 933         if (rc < 0)
 934                 GOTO(out_rqset, rc);
 935
 936         list_for_each_entry(req, &set->set_list, rq_link) {
 937                 rc = obd_statfs_async(lov->lov_tgts[req->rq_idx]->ltd_exp,
 938                                       &req->rq_oi, max_age, rqset);
 939                 if (rc < 0)
 940                         GOTO(out_set, rc);
 941         }
 942
 943         rc = ptlrpc_set_wait(rqset);
 944
 945 out_set:
 946         if (rc < 0)
 947                 atomic_set(&set->set_completes, 0);
 948
 949         rc2 = lov_fini_statfs_set(set);
 950         if (rc == 0)
 951                 rc = rc2;
 952
 953 out_rqset:
 954         ptlrpc_set_destroy(rqset);
 955
 956         RETURN(rc);
 957 }
 958
 959 static int lov_iocontrol(unsigned int cmd, struct obd_export *exp, int len,
 960                          void *karg, void __user *uarg)
 961 {
 962         struct obd_device *obddev = class_exp2obd(exp);
 963         struct lov_obd *lov = &obddev->u.lov;
 964         int i = 0, rc = 0, count = lov->desc.ld_tgt_count;
 965         struct obd_uuid *uuidp;
 966         ENTRY;
 967
 968         switch (cmd) {
 969         case IOC_OBD_STATFS: {
 970                 struct obd_ioctl_data *data = karg;
 971                 struct obd_device *osc_obd;
 972                 struct obd_statfs stat_buf = {0};
 973                 __u32 index;
 974                 __u32 flags;
 975
 976                 memcpy(&index, data->ioc_inlbuf2, sizeof(index));
 977                 if ((index >= count))
 978                         RETURN(-ENODEV);
 979
 980                 if (!lov->lov_tgts[index])
 981                         /* Try again with the next index */
 982                         RETURN(-EAGAIN);
 983                 if (!lov->lov_tgts[index]->ltd_active)
 984                         RETURN(-ENODATA);
 985
 986                 osc_obd = class_exp2obd(lov->lov_tgts[index]->ltd_exp);
 987                 if (!osc_obd)
 988                         RETURN(-EINVAL);
 989
 990                 /* copy UUID */
 991                 if (copy_to_user(data->ioc_pbuf2, obd2cli_tgt(osc_obd),
 992                                  min_t(unsigned long, data->ioc_plen2,
 993                                        sizeof(struct obd_uuid))))
 994                         RETURN(-EFAULT);
 995
 996                 memcpy(&flags, data->ioc_inlbuf1, sizeof(flags));
 997                 flags = flags & LL_STATFS_NODELAY ? OBD_STATFS_NODELAY : 0;
 998
 999                 /* got statfs data */
1000                 rc = obd_statfs(NULL, lov->lov_tgts[index]->ltd_exp, &stat_buf,
1001                                 ktime_get_seconds() - OBD_STATFS_CACHE_SECONDS,
1002                                 flags);
1003                 if (rc)
1004                         RETURN(rc);
1005                 if (copy_to_user(data->ioc_pbuf1, &stat_buf,
1006                                  min_t(unsigned long, data->ioc_plen1,
1007                                        sizeof(struct obd_statfs))))
1008                         RETURN(-EFAULT);
1009                 break;
1010         }
1011         case OBD_IOC_LOV_GET_CONFIG: {
1012                 struct obd_ioctl_data *data;
1013                 struct lov_desc *desc;
1014                 char *buf = NULL;
1015                 __u32 *genp;
1016
1017                 len = 0;
1018                 if (obd_ioctl_getdata(&buf, &len, uarg))
1019                         RETURN(-EINVAL);
1020
1021                 data = (struct obd_ioctl_data *)buf;
1022
1023                 if (sizeof(*desc) > data->ioc_inllen1) {
1024                         OBD_FREE_LARGE(buf, len);
1025                         RETURN(-EINVAL);
1026                 }
1027
1028                 if (sizeof(uuidp->uuid) * count > data->ioc_inllen2) {
1029                         OBD_FREE_LARGE(buf, len);
1030                         RETURN(-EINVAL);
1031                 }
1032
1033                 if (sizeof(__u32) * count > data->ioc_inllen3) {
1034                         OBD_FREE_LARGE(buf, len);
1035                         RETURN(-EINVAL);
1036                 }
1037
1038                 desc = (struct lov_desc *)data->ioc_inlbuf1;
1039                 memcpy(desc, &(lov->desc), sizeof(*desc));
1040
1041                 uuidp = (struct obd_uuid *)data->ioc_inlbuf2;
1042                 genp = (__u32 *)data->ioc_inlbuf3;
1043                 /* the uuid will be empty for deleted OSTs */
1044                 for (i = 0; i < count; i++, uuidp++, genp++) {
1045                         if (!lov->lov_tgts[i])
1046                                 continue;
1047                         *uuidp = lov->lov_tgts[i]->ltd_uuid;
1048                         *genp = lov->lov_tgts[i]->ltd_gen;
1049                 }
1050
1051                 if (copy_to_user(uarg, buf, len))
1052                         rc = -EFAULT;
1053                 OBD_FREE_LARGE(buf, len);
1054                 break;
1055         }
1056         case OBD_IOC_QUOTACTL: {
1057                 struct if_quotactl *qctl = karg;
1058                 struct lov_tgt_desc *tgt = NULL;
1059                 struct obd_quotactl *oqctl;
1060
1061                 if (qctl->qc_valid == QC_OSTIDX) {
1062                         if (count <= qctl->qc_idx)
1063                                 RETURN(-EINVAL);
1064
1065                         tgt = lov->lov_tgts[qctl->qc_idx];
1066                         if (!tgt || !tgt->ltd_exp)
1067                                 RETURN(-EINVAL);
1068                 } else if (qctl->qc_valid == QC_UUID) {
1069                         for (i = 0; i < count; i++) {
1070                                 tgt = lov->lov_tgts[i];
1071                                 if (!tgt ||
1072                                     !obd_uuid_equals(&tgt->ltd_uuid,
1073                                                      &qctl->obd_uuid))
1074                                         continue;
1075
1076                                 if (tgt->ltd_exp == NULL)
1077                                         RETURN(-EINVAL);
1078
1079                                 break;
1080                         }
1081                 } else {
1082                         RETURN(-EINVAL);
1083                 }
1084
1085                 if (i >= count)
1086                         RETURN(-EAGAIN);
1087
1088                 LASSERT(tgt && tgt->ltd_exp);
1089                 OBD_ALLOC_PTR(oqctl);
1090                 if (!oqctl)
1091                         RETURN(-ENOMEM);
1092
1093                 QCTL_COPY(oqctl, qctl);
1094                 rc = obd_quotactl(tgt->ltd_exp, oqctl);
1095                 if (rc == 0) {
1096                         QCTL_COPY(qctl, oqctl);
1097                         qctl->qc_valid = QC_OSTIDX;
1098                         qctl->obd_uuid = tgt->ltd_uuid;
1099                 }
1100                 OBD_FREE_PTR(oqctl);
1101                 break;
1102         }
1103         default: {
1104                 int set = 0;
1105
1106                 if (count == 0)
1107                         RETURN(-ENOTTY);
1108
1109                 for (i = 0; i < count; i++) {
1110                         int err;
1111                         struct obd_device *osc_obd;
1112
1113                         /* OST was disconnected */
1114                         if (!lov->lov_tgts[i] || !lov->lov_tgts[i]->ltd_exp)
1115                                 continue;
1116
1117                         /* ll_umount_begin() sets force flag but for lov, not
1118                          * osc. Let's pass it through */
1119                         osc_obd = class_exp2obd(lov->lov_tgts[i]->ltd_exp);
1120                         osc_obd->obd_force = obddev->obd_force;
1121                         err = obd_iocontrol(cmd, lov->lov_tgts[i]->ltd_exp,
1122                                             len, karg, uarg);
1123                         if (err) {
1124                                 if (lov->lov_tgts[i]->ltd_active) {
1125                                         CDEBUG(err == -ENOTTY ?
1126                                                D_IOCTL : D_WARNING,
1127                                                "iocontrol OSC %s on OST "
1128                                                "idx %d cmd %x: err = %d\n",
1129                                                lov_uuid2str(lov, i),
1130                                                i, cmd, err);
1131                                         if (!rc)
1132                                                 rc = err;
1133                                 }
1134                         } else {
1135                                 set = 1;
1136                         }
1137                 }
1138                 if (!set && !rc)
1139                         rc = -EIO;
1140         }
1141         }
1142
1143         RETURN(rc);
1144 }
1145
1146 static int lov_get_info(const struct lu_env *env, struct obd_export *exp,
1147                         __u32 keylen, void *key, __u32 *vallen, void *val)
1148 {
1149         struct obd_device *obddev = class_exp2obd(exp);
1150         struct lov_obd *lov = &obddev->u.lov;
1151         struct lov_desc *ld = &lov->desc;
1152         int rc = 0;
1153         ENTRY;
1154
1155         if (vallen == NULL || val == NULL)
1156                 RETURN(-EFAULT);
1157
1158         obd_getref(obddev);
1159
1160         if (KEY_IS(KEY_MAX_EASIZE)) {
1161                 u32 max_stripe_count = min_t(u32, ld->ld_active_tgt_count,
1162                                              LOV_MAX_STRIPE_COUNT);
1163
1164                 *((u32 *)val) = lov_mds_md_size(max_stripe_count, LOV_MAGIC_V3);
1165         } else if (KEY_IS(KEY_DEFAULT_EASIZE)) {
1166                 u32 def_stripe_count = min_t(u32, ld->ld_default_stripe_count,
1167                                              LOV_MAX_STRIPE_COUNT);
1168
1169                 *((u32 *)val) = lov_mds_md_size(def_stripe_count, LOV_MAGIC_V3);
1170         } else if (KEY_IS(KEY_TGT_COUNT)) {
1171                 *((int *)val) = lov->desc.ld_tgt_count;
1172         } else {
1173                 rc = -EINVAL;
1174         }
1175
1176         obd_putref(obddev);
1177
1178         RETURN(rc);
1179 }
1180
1181 static int lov_set_info_async(const struct lu_env *env, struct obd_export *exp,
1182                               __u32 keylen, void *key,
1183                               __u32 vallen, void *val,
1184                               struct ptlrpc_request_set *set)
1185 {
1186         struct obd_device *obddev = class_exp2obd(exp);
1187         struct lov_obd *lov = &obddev->u.lov;
1188         struct lov_tgt_desc *tgt;
1189         bool do_inactive = false, no_set = false;
1190         u32 i;
1191         int rc = 0;
1192         int err;
1193
1194         ENTRY;
1195
1196         if (set == NULL) {
1197                 no_set = true;
1198                 set = ptlrpc_prep_set();
1199                 if (!set)
1200                         RETURN(-ENOMEM);
1201         }
1202
1203         obd_getref(obddev);
1204
1205         if (KEY_IS(KEY_CHECKSUM)) {
1206                 do_inactive = true;
1207         } else if (KEY_IS(KEY_CACHE_SET)) {
1208                 LASSERT(lov->lov_cache == NULL);
1209                 lov->lov_cache = val;
1210                 do_inactive = true;
1211                 cl_cache_incref(lov->lov_cache);
1212         }
1213
1214         for (i = 0; i < lov->desc.ld_tgt_count; i++) {
1215                 tgt = lov->lov_tgts[i];
1216
1217                 /* OST was disconnected */
1218                 if (tgt == NULL || tgt->ltd_exp == NULL)
1219                         continue;
1220
1221                 /* OST is inactive and we don't want inactive OSCs */
1222                 if (!tgt->ltd_active && !do_inactive)
1223                         continue;
1224
1225                 err = obd_set_info_async(env, tgt->ltd_exp, keylen, key,
1226                                          vallen, val, set);
1227
1228                 if (rc == 0)
1229                         rc = err;
1230         }
1231
1232         /* cycle through MDC target for Data-on-MDT */
1233         for (i = 0; i < LOV_MDC_TGT_MAX; i++) {
1234                 struct obd_device *mdc;
1235
1236                 mdc = lov->lov_mdc_tgts[i].lmtd_mdc;
1237                 if (mdc == NULL)
1238                         continue;
1239
1240                 err = obd_set_info_async(env, mdc->obd_self_export,
1241                                          keylen, key, vallen, val, set);
1242                 if (rc == 0)
1243                         rc = err;
1244         }
1245
1246         obd_putref(obddev);
1247         if (no_set) {
1248                 err = ptlrpc_set_wait(set);
1249                 if (rc == 0)
1250                         rc = err;
1251                 ptlrpc_set_destroy(set);
1252         }
1253         RETURN(rc);
1254 }
1255
1256 void lov_stripe_lock(struct lov_stripe_md *md)
1257 __acquires(&md->lsm_lock)
1258 {
1259         LASSERT(md->lsm_lock_owner != current_pid());
1260         spin_lock(&md->lsm_lock);
1261         LASSERT(md->lsm_lock_owner == 0);
1262         md->lsm_lock_owner = current_pid();
1263 }
1264
1265 void lov_stripe_unlock(struct lov_stripe_md *md)
1266 __releases(&md->lsm_lock)
1267 {
1268         LASSERT(md->lsm_lock_owner == current_pid());
1269         md->lsm_lock_owner = 0;
1270         spin_unlock(&md->lsm_lock);
1271 }
1272
1273 static int lov_quotactl(struct obd_device *obd, struct obd_export *exp,
1274                         struct obd_quotactl *oqctl)
1275 {
1276         struct lov_obd      *lov = &obd->u.lov;
1277         struct lov_tgt_desc *tgt;
1278         __u64                curspace = 0;
1279         __u64                bhardlimit = 0;
1280         int                  i, rc = 0;
1281         ENTRY;
1282
1283         if (oqctl->qc_cmd != Q_GETOQUOTA &&
1284             oqctl->qc_cmd != LUSTRE_Q_SETQUOTA) {
1285                 CERROR("%s: bad quota opc %x for lov obd\n",
1286                        obd->obd_name, oqctl->qc_cmd);
1287                 RETURN(-EFAULT);
1288         }
1289
1290         /* for lov tgt */
1291         obd_getref(obd);
1292         for (i = 0; i < lov->desc.ld_tgt_count; i++) {
1293                 int err;
1294
1295                 tgt = lov->lov_tgts[i];
1296
1297                 if (!tgt)
1298                         continue;
1299
1300                 if (!tgt->ltd_active || tgt->ltd_reap) {
1301                         if (oqctl->qc_cmd == Q_GETOQUOTA &&
1302                             lov->lov_tgts[i]->ltd_activate) {
1303                                 rc = -ENETDOWN;
1304                                 CERROR("ost %d is inactive\n", i);
1305                         } else {
1306                                 CDEBUG(D_HA, "ost %d is inactive\n", i);
1307                         }
1308                         continue;
1309                 }
1310
1311                 err = obd_quotactl(tgt->ltd_exp, oqctl);
1312                 if (err) {
1313                         if (tgt->ltd_active && !rc)
1314                                 rc = err;
1315                         continue;
1316                 }
1317
1318                 if (oqctl->qc_cmd == Q_GETOQUOTA) {
1319                         curspace += oqctl->qc_dqblk.dqb_curspace;
1320                         bhardlimit += oqctl->qc_dqblk.dqb_bhardlimit;
1321                 }
1322         }
1323         obd_putref(obd);
1324
1325         if (oqctl->qc_cmd == Q_GETOQUOTA) {
1326                 oqctl->qc_dqblk.dqb_curspace = curspace;
1327                 oqctl->qc_dqblk.dqb_bhardlimit = bhardlimit;
1328         }
1329         RETURN(rc);
1330 }
1331
1332 static struct obd_ops lov_obd_ops = {
1333         .o_owner                = THIS_MODULE,
1334         .o_setup                = lov_setup,
1335         .o_cleanup              = lov_cleanup,
1336         .o_connect              = lov_connect,
1337         .o_disconnect           = lov_disconnect,
1338         .o_statfs               = lov_statfs,
1339         .o_iocontrol            = lov_iocontrol,
1340         .o_get_info             = lov_get_info,
1341         .o_set_info_async       = lov_set_info_async,
1342         .o_notify               = lov_notify,
1343         .o_pool_new             = lov_pool_new,
1344         .o_pool_rem             = lov_pool_remove,
1345         .o_pool_add             = lov_pool_add,
1346         .o_pool_del             = lov_pool_del,
1347         .o_getref               = lov_getref,
1348         .o_putref               = lov_putref,
1349         .o_quotactl             = lov_quotactl,
1350 };
1351
1352 struct kmem_cache *lov_oinfo_slab;
1353
1354 static int __init lov_init(void)
1355 {
1356         bool enable_proc = true;
1357         struct obd_type *type;
1358         int rc;
1359         ENTRY;
1360
1361         /* print an address of _any_ initialized kernel symbol from this
1362          * module, to allow debugging with gdb that doesn't support data
1363          * symbols from modules.*/
1364         CDEBUG(D_INFO, "Lustre LOV module (%p).\n", &lov_caches);
1365
1366         rc = lu_kmem_init(lov_caches);
1367         if (rc)
1368                 return rc;
1369
1370         lov_oinfo_slab = kmem_cache_create("lov_oinfo",
1371                                            sizeof(struct lov_oinfo), 0,
1372                                            SLAB_HWCACHE_ALIGN, NULL);
1373         if (lov_oinfo_slab == NULL) {
1374                 lu_kmem_fini(lov_caches);
1375                 return -ENOMEM;
1376         }
1377
1378         type = class_search_type(LUSTRE_LOD_NAME);
1379         if (type != NULL && type->typ_procsym != NULL)
1380                 enable_proc = false;
1381
1382         rc = class_register_type(&lov_obd_ops, NULL, enable_proc, NULL,
1383                                  LUSTRE_LOV_NAME, &lov_device_type);
1384
1385         if (rc) {
1386                 kmem_cache_destroy(lov_oinfo_slab);
1387                 lu_kmem_fini(lov_caches);
1388         }
1389
1390         RETURN(rc);
1391 }
1392
1393 static void __exit lov_exit(void)
1394 {
1395         class_unregister_type(LUSTRE_LOV_NAME);
1396         kmem_cache_destroy(lov_oinfo_slab);
1397         lu_kmem_fini(lov_caches);
1398 }
1399
1400 MODULE_AUTHOR("OpenSFS, Inc. <http://www.lustre.org/>");
1401 MODULE_DESCRIPTION("Lustre Logical Object Volume");
1402 MODULE_VERSION(LUSTRE_VERSION_STRING);
1403 MODULE_LICENSE("GPL");
1404
1405 module_init(lov_init);
1406 module_exit(lov_exit);