drivers/staging/lustre/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, 2015, 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 "../../include/linux/libcfs/libcfs.h"
  42
  43 #include "../include/obd_support.h"
  44 #include "../include/lustre_lib.h"
  45 #include "../include/lustre_net.h"
  46 #include "../include/lustre/lustre_idl.h"
  47 #include "../include/lustre_dlm.h"
  48 #include "../include/lustre_mds.h"
  49 #include "../include/obd_class.h"
  50 #include "../include/lprocfs_status.h"
  51 #include "../include/lustre_param.h"
  52 #include "../include/cl_object.h"
  53 #include "../include/lustre/ll_fiemap.h"
  54 #include "../include/lustre_fid.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  */
  61 static void lov_getref(struct obd_device *obd)
  62 {
  63         struct lov_obd *lov = &obd->u.lov;
  64
  65         /* nobody gets through here until lov_putref is done */
  66         mutex_lock(&lov->lov_lock);
  67         atomic_inc(&lov->lov_refcount);
  68         mutex_unlock(&lov->lov_lock);
  69         return;
  70 }
  71
  72 static void __lov_del_obd(struct obd_device *obd, struct lov_tgt_desc *tgt);
  73
  74 static void lov_putref(struct obd_device *obd)
  75 {
  76         struct lov_obd *lov = &obd->u.lov;
  77
  78         mutex_lock(&lov->lov_lock);
  79         /* ok to dec to 0 more than once -- ltd_exp's will be null */
  80         if (atomic_dec_and_test(&lov->lov_refcount) && lov->lov_death_row) {
  81                 LIST_HEAD(kill);
  82                 int i;
  83                 struct lov_tgt_desc *tgt, *n;
  84
  85                 CDEBUG(D_CONFIG, "destroying %d lov targets\n",
  86                        lov->lov_death_row);
  87                 for (i = 0; i < lov->desc.ld_tgt_count; i++) {
  88                         tgt = lov->lov_tgts[i];
  89
  90                         if (!tgt || !tgt->ltd_reap)
  91                                 continue;
  92                         list_add(&tgt->ltd_kill, &kill);
  93                         /* XXX - right now there is a dependency on ld_tgt_count
  94                          * being the maximum tgt index for computing the
  95                          * mds_max_easize. So we can't shrink it.
  96                          */
  97                         lov_ost_pool_remove(&lov->lov_packed, i);
  98                         lov->lov_tgts[i] = NULL;
  99                         lov->lov_death_row--;
 100                 }
 101                 mutex_unlock(&lov->lov_lock);
 102
 103                 list_for_each_entry_safe(tgt, n, &kill, ltd_kill) {
 104                         list_del(&tgt->ltd_kill);
 105                         /* Disconnect */
 106                         __lov_del_obd(obd, tgt);
 107                 }
 108
 109                 if (lov->lov_tgts_kobj)
 110                         kobject_put(lov->lov_tgts_kobj);
 111
 112         } else {
 113                 mutex_unlock(&lov->lov_lock);
 114         }
 115 }
 116
 117 static int lov_set_osc_active(struct obd_device *obd, struct obd_uuid *uuid,
 118                               enum obd_notify_event ev);
 119 static int lov_notify(struct obd_device *obd, struct obd_device *watched,
 120                       enum obd_notify_event ev, void *data);
 121
 122 int lov_connect_obd(struct obd_device *obd, __u32 index, int activate,
 123                     struct obd_connect_data *data)
 124 {
 125         struct lov_obd *lov = &obd->u.lov;
 126         struct obd_uuid *tgt_uuid;
 127         struct obd_device *tgt_obd;
 128         static struct obd_uuid lov_osc_uuid = { "LOV_OSC_UUID" };
 129         struct obd_import *imp;
 130         int rc;
 131
 132         if (!lov->lov_tgts[index])
 133                 return -EINVAL;
 134
 135         tgt_uuid = &lov->lov_tgts[index]->ltd_uuid;
 136         tgt_obd = lov->lov_tgts[index]->ltd_obd;
 137
 138         if (!tgt_obd->obd_set_up) {
 139                 CERROR("Target %s not set up\n", obd_uuid2str(tgt_uuid));
 140                 return -EINVAL;
 141         }
 142
 143         /* override the sp_me from lov */
 144         tgt_obd->u.cli.cl_sp_me = lov->lov_sp_me;
 145
 146         if (data && (data->ocd_connect_flags & OBD_CONNECT_INDEX))
 147                 data->ocd_index = index;
 148
 149         /*
 150          * Divine LOV knows that OBDs under it are OSCs.
 151          */
 152         imp = tgt_obd->u.cli.cl_import;
 153
 154         if (activate) {
 155                 tgt_obd->obd_no_recov = 0;
 156                 /* FIXME this is probably supposed to be
 157                  * ptlrpc_set_import_active.  Horrible naming.
 158                  */
 159                 ptlrpc_activate_import(imp);
 160         }
 161
 162         rc = obd_register_observer(tgt_obd, obd);
 163         if (rc) {
 164                 CERROR("Target %s register_observer error %d\n",
 165                        obd_uuid2str(tgt_uuid), rc);
 166                 return rc;
 167         }
 168
 169         if (imp->imp_invalid) {
 170                 CDEBUG(D_CONFIG, "not connecting OSC %s; administratively disabled\n",
 171                        obd_uuid2str(tgt_uuid));
 172                 return 0;
 173         }
 174
 175         rc = obd_connect(NULL, &lov->lov_tgts[index]->ltd_exp, tgt_obd,
 176                          &lov_osc_uuid, data, NULL);
 177         if (rc || !lov->lov_tgts[index]->ltd_exp) {
 178                 CERROR("Target %s connect error %d\n",
 179                        obd_uuid2str(tgt_uuid), rc);
 180                 return -ENODEV;
 181         }
 182
 183         lov->lov_tgts[index]->ltd_reap = 0;
 184
 185         CDEBUG(D_CONFIG, "Connected tgt idx %d %s (%s) %sactive\n", index,
 186                obd_uuid2str(tgt_uuid), tgt_obd->obd_name, activate ? "":"in");
 187
 188         if (lov->lov_tgts_kobj)
 189                 /* Even if we failed, that's ok */
 190                 rc = sysfs_create_link(lov->lov_tgts_kobj, &tgt_obd->obd_kobj,
 191                                        tgt_obd->obd_name);
 192
 193         return 0;
 194 }
 195
 196 static int lov_connect(const struct lu_env *env,
 197                        struct obd_export **exp, struct obd_device *obd,
 198                        struct obd_uuid *cluuid, struct obd_connect_data *data,
 199                        void *localdata)
 200 {
 201         struct lov_obd *lov = &obd->u.lov;
 202         struct lov_tgt_desc *tgt;
 203         struct lustre_handle conn;
 204         int i, rc;
 205
 206         CDEBUG(D_CONFIG, "connect #%d\n", lov->lov_connects);
 207
 208         rc = class_connect(&conn, obd, cluuid);
 209         if (rc)
 210                 return rc;
 211
 212         *exp = class_conn2export(&conn);
 213
 214         /* Why should there ever be more than 1 connect? */
 215         lov->lov_connects++;
 216         LASSERT(lov->lov_connects == 1);
 217
 218         memset(&lov->lov_ocd, 0, sizeof(lov->lov_ocd));
 219         if (data)
 220                 lov->lov_ocd = *data;
 221
 222         obd_getref(obd);
 223
 224         lov->lov_tgts_kobj = kobject_create_and_add("target_obds",
 225                                                     &obd->obd_kobj);
 226
 227         for (i = 0; i < lov->desc.ld_tgt_count; i++) {
 228                 tgt = lov->lov_tgts[i];
 229                 if (!tgt || obd_uuid_empty(&tgt->ltd_uuid))
 230                         continue;
 231                 /* Flags will be lowest common denominator */
 232                 rc = lov_connect_obd(obd, i, tgt->ltd_activate, &lov->lov_ocd);
 233                 if (rc) {
 234                         CERROR("%s: lov connect tgt %d failed: %d\n",
 235                                obd->obd_name, i, rc);
 236                         continue;
 237                 }
 238                 /* connect to administrative disabled ost */
 239                 if (!lov->lov_tgts[i]->ltd_exp)
 240                         continue;
 241
 242                 rc = lov_notify(obd, lov->lov_tgts[i]->ltd_exp->exp_obd,
 243                                 OBD_NOTIFY_CONNECT, (void *)&i);
 244                 if (rc) {
 245                         CERROR("%s error sending notify %d\n",
 246                                obd->obd_name, rc);
 247                 }
 248         }
 249         obd_putref(obd);
 250
 251         return 0;
 252 }
 253
 254 static int lov_disconnect_obd(struct obd_device *obd, struct lov_tgt_desc *tgt)
 255 {
 256         struct lov_obd *lov = &obd->u.lov;
 257         struct obd_device *osc_obd;
 258         int rc;
 259
 260         osc_obd = class_exp2obd(tgt->ltd_exp);
 261         CDEBUG(D_CONFIG, "%s: disconnecting target %s\n",
 262                obd->obd_name, osc_obd ? osc_obd->obd_name : "NULL");
 263
 264         if (tgt->ltd_active) {
 265                 tgt->ltd_active = 0;
 266                 lov->desc.ld_active_tgt_count--;
 267                 tgt->ltd_exp->exp_obd->obd_inactive = 1;
 268         }
 269
 270         if (osc_obd) {
 271                 if (lov->lov_tgts_kobj)
 272                         sysfs_remove_link(lov->lov_tgts_kobj,
 273                                           osc_obd->obd_name);
 274
 275                 /* Pass it on to our clients.
 276                  * XXX This should be an argument to disconnect,
 277                  * XXX not a back-door flag on the OBD.  Ah well.
 278                  */
 279                 osc_obd->obd_force = obd->obd_force;
 280                 osc_obd->obd_fail = obd->obd_fail;
 281                 osc_obd->obd_no_recov = obd->obd_no_recov;
 282         }
 283
 284         obd_register_observer(osc_obd, NULL);
 285
 286         rc = obd_disconnect(tgt->ltd_exp);
 287         if (rc) {
 288                 CERROR("Target %s disconnect error %d\n",
 289                        tgt->ltd_uuid.uuid, rc);
 290                 rc = 0;
 291         }
 292
 293         tgt->ltd_exp = NULL;
 294         return 0;
 295 }
 296
 297 static int lov_disconnect(struct obd_export *exp)
 298 {
 299         struct obd_device *obd = class_exp2obd(exp);
 300         struct lov_obd *lov = &obd->u.lov;
 301         int i, rc;
 302
 303         if (!lov->lov_tgts)
 304                 goto out;
 305
 306         /* Only disconnect the underlying layers on the final disconnect. */
 307         lov->lov_connects--;
 308         if (lov->lov_connects != 0) {
 309                 /* why should there be more than 1 connect? */
 310                 CERROR("disconnect #%d\n", lov->lov_connects);
 311                 goto out;
 312         }
 313
 314         /* Let's hold another reference so lov_del_obd doesn't spin through
 315          * putref every time
 316          */
 317         obd_getref(obd);
 318
 319         for (i = 0; i < lov->desc.ld_tgt_count; i++) {
 320                 if (lov->lov_tgts[i] && lov->lov_tgts[i]->ltd_exp) {
 321                         /* Disconnection is the last we know about an obd */
 322                         lov_del_target(obd, i, NULL, lov->lov_tgts[i]->ltd_gen);
 323                 }
 324         }
 325
 326         obd_putref(obd);
 327
 328 out:
 329         rc = class_disconnect(exp); /* bz 9811 */
 330         return rc;
 331 }
 332
 333 /* Error codes:
 334  *
 335  *  -EINVAL  : UUID can't be found in the LOV's target list
 336  *  -ENOTCONN: The UUID is found, but the target connection is bad (!)
 337  *  -EBADF   : The UUID is found, but the OBD is the wrong type (!)
 338  *  any >= 0 : is log target index
 339  */
 340 static int lov_set_osc_active(struct obd_device *obd, struct obd_uuid *uuid,
 341                               enum obd_notify_event ev)
 342 {
 343         struct lov_obd *lov = &obd->u.lov;
 344         struct lov_tgt_desc *tgt;
 345         int index, activate, active;
 346
 347         CDEBUG(D_INFO, "Searching in lov %p for uuid %s event(%d)\n",
 348                lov, uuid->uuid, ev);
 349
 350         obd_getref(obd);
 351         for (index = 0; index < lov->desc.ld_tgt_count; index++) {
 352                 tgt = lov->lov_tgts[index];
 353                 if (!tgt)
 354                         continue;
 355                 /*
 356                  * LU-642, initially inactive OSC could miss the obd_connect,
 357                  * we make up for it here.
 358                  */
 359                 if (ev == OBD_NOTIFY_ACTIVATE && !tgt->ltd_exp &&
 360                     obd_uuid_equals(uuid, &tgt->ltd_uuid)) {
 361                         struct obd_uuid lov_osc_uuid = {"LOV_OSC_UUID"};
 362
 363                         obd_connect(NULL, &tgt->ltd_exp, tgt->ltd_obd,
 364                                     &lov_osc_uuid, &lov->lov_ocd, NULL);
 365                 }
 366                 if (!tgt->ltd_exp)
 367                         continue;
 368
 369                 CDEBUG(D_INFO, "lov idx %d is %s conn %#llx\n",
 370                        index, obd_uuid2str(&tgt->ltd_uuid),
 371                        tgt->ltd_exp->exp_handle.h_cookie);
 372                 if (obd_uuid_equals(uuid, &tgt->ltd_uuid))
 373                         break;
 374         }
 375
 376         if (index == lov->desc.ld_tgt_count) {
 377                 index = -EINVAL;
 378                 goto out;
 379         }
 380
 381         if (ev == OBD_NOTIFY_DEACTIVATE || ev == OBD_NOTIFY_ACTIVATE) {
 382                 activate = (ev == OBD_NOTIFY_ACTIVATE) ? 1 : 0;
 383
 384                 if (lov->lov_tgts[index]->ltd_activate == activate) {
 385                         CDEBUG(D_INFO, "OSC %s already %sactivate!\n",
 386                                uuid->uuid, activate ? "" : "de");
 387                 } else {
 388                         lov->lov_tgts[index]->ltd_activate = activate;
 389                         CDEBUG(D_CONFIG, "%sactivate OSC %s\n",
 390                                activate ? "" : "de", obd_uuid2str(uuid));
 391                 }
 392
 393         } else if (ev == OBD_NOTIFY_INACTIVE || ev == OBD_NOTIFY_ACTIVE) {
 394                 active = (ev == OBD_NOTIFY_ACTIVE) ? 1 : 0;
 395
 396                 if (lov->lov_tgts[index]->ltd_active == active) {
 397                         CDEBUG(D_INFO, "OSC %s already %sactive!\n",
 398                                uuid->uuid, active ? "" : "in");
 399                         goto out;
 400                 }
 401                 CDEBUG(D_CONFIG, "Marking OSC %s %sactive\n",
 402                        obd_uuid2str(uuid), active ? "" : "in");
 403
 404                 lov->lov_tgts[index]->ltd_active = active;
 405                 if (active) {
 406                         lov->desc.ld_active_tgt_count++;
 407                         lov->lov_tgts[index]->ltd_exp->exp_obd->obd_inactive = 0;
 408                 } else {
 409                         lov->desc.ld_active_tgt_count--;
 410                         lov->lov_tgts[index]->ltd_exp->exp_obd->obd_inactive = 1;
 411                 }
 412         } else {
 413                 CERROR("Unknown event(%d) for uuid %s", ev, uuid->uuid);
 414         }
 415
 416  out:
 417         obd_putref(obd);
 418         return index;
 419 }
 420
 421 static int lov_notify(struct obd_device *obd, struct obd_device *watched,
 422                       enum obd_notify_event ev, void *data)
 423 {
 424         int rc = 0;
 425         struct lov_obd *lov = &obd->u.lov;
 426
 427         down_read(&lov->lov_notify_lock);
 428         if (!lov->lov_connects) {
 429                 up_read(&lov->lov_notify_lock);
 430                 return rc;
 431         }
 432
 433         if (ev == OBD_NOTIFY_ACTIVE || ev == OBD_NOTIFY_INACTIVE ||
 434             ev == OBD_NOTIFY_ACTIVATE || ev == OBD_NOTIFY_DEACTIVATE) {
 435                 struct obd_uuid *uuid;
 436
 437                 LASSERT(watched);
 438
 439                 if (strcmp(watched->obd_type->typ_name, LUSTRE_OSC_NAME)) {
 440                         up_read(&lov->lov_notify_lock);
 441                         CERROR("unexpected notification of %s %s!\n",
 442                                watched->obd_type->typ_name,
 443                                watched->obd_name);
 444                         return -EINVAL;
 445                 }
 446                 uuid = &watched->u.cli.cl_target_uuid;
 447
 448                 /* Set OSC as active before notifying the observer, so the
 449                  * observer can use the OSC normally.
 450                  */
 451                 rc = lov_set_osc_active(obd, uuid, ev);
 452                 if (rc < 0) {
 453                         up_read(&lov->lov_notify_lock);
 454                         CERROR("event(%d) of %s failed: %d\n", ev,
 455                                obd_uuid2str(uuid), rc);
 456                         return rc;
 457                 }
 458                 /* active event should be pass lov target index as data */
 459                 data = &rc;
 460         }
 461
 462         /* Pass the notification up the chain. */
 463         if (watched) {
 464                 rc = obd_notify_observer(obd, watched, ev, data);
 465         } else {
 466                 /* NULL watched means all osc's in the lov (only for syncs) */
 467                 /* sync event should be send lov idx as data */
 468                 struct lov_obd *lov = &obd->u.lov;
 469                 int i, is_sync;
 470
 471                 data = &i;
 472                 is_sync = (ev == OBD_NOTIFY_SYNC) ||
 473                           (ev == OBD_NOTIFY_SYNC_NONBLOCK);
 474
 475                 obd_getref(obd);
 476                 for (i = 0; i < lov->desc.ld_tgt_count; i++) {
 477                         if (!lov->lov_tgts[i])
 478                                 continue;
 479
 480                         /* don't send sync event if target not
 481                          * connected/activated
 482                          */
 483                         if (is_sync &&  !lov->lov_tgts[i]->ltd_active)
 484                                 continue;
 485
 486                         rc = obd_notify_observer(obd, lov->lov_tgts[i]->ltd_obd,
 487                                                  ev, data);
 488                         if (rc) {
 489                                 CERROR("%s: notify %s of %s failed %d\n",
 490                                        obd->obd_name,
 491                                        obd->obd_observer->obd_name,
 492                                        lov->lov_tgts[i]->ltd_obd->obd_name,
 493                                        rc);
 494                         }
 495                 }
 496                 obd_putref(obd);
 497         }
 498
 499         up_read(&lov->lov_notify_lock);
 500         return rc;
 501 }
 502
 503 static int lov_add_target(struct obd_device *obd, struct obd_uuid *uuidp,
 504                           __u32 index, int gen, int active)
 505 {
 506         struct lov_obd *lov = &obd->u.lov;
 507         struct lov_tgt_desc *tgt;
 508         struct obd_device *tgt_obd;
 509         int rc;
 510
 511         CDEBUG(D_CONFIG, "uuid:%s idx:%d gen:%d active:%d\n",
 512                uuidp->uuid, index, gen, active);
 513
 514         if (gen <= 0) {
 515                 CERROR("request to add OBD %s with invalid generation: %d\n",
 516                        uuidp->uuid, gen);
 517                 return -EINVAL;
 518         }
 519
 520         tgt_obd = class_find_client_obd(uuidp, LUSTRE_OSC_NAME,
 521                                         &obd->obd_uuid);
 522         if (!tgt_obd)
 523                 return -EINVAL;
 524
 525         mutex_lock(&lov->lov_lock);
 526
 527         if ((index < lov->lov_tgt_size) && lov->lov_tgts[index]) {
 528                 tgt = lov->lov_tgts[index];
 529                 CERROR("UUID %s already assigned at LOV target index %d\n",
 530                        obd_uuid2str(&tgt->ltd_uuid), index);
 531                 mutex_unlock(&lov->lov_lock);
 532                 return -EEXIST;
 533         }
 534
 535         if (index >= lov->lov_tgt_size) {
 536                 /* We need to reallocate the lov target array. */
 537                 struct lov_tgt_desc **newtgts, **old = NULL;
 538                 __u32 newsize, oldsize = 0;
 539
 540                 newsize = max_t(__u32, lov->lov_tgt_size, 2);
 541                 while (newsize < index + 1)
 542                         newsize <<= 1;
 543                 newtgts = kcalloc(newsize, sizeof(*newtgts), GFP_NOFS);
 544                 if (!newtgts) {
 545                         mutex_unlock(&lov->lov_lock);
 546                         return -ENOMEM;
 547                 }
 548
 549                 if (lov->lov_tgt_size) {
 550                         memcpy(newtgts, lov->lov_tgts, sizeof(*newtgts) *
 551                                lov->lov_tgt_size);
 552                         old = lov->lov_tgts;
 553                         oldsize = lov->lov_tgt_size;
 554                 }
 555
 556                 lov->lov_tgts = newtgts;
 557                 lov->lov_tgt_size = newsize;
 558                 smp_rmb();
 559                 kfree(old);
 560
 561                 CDEBUG(D_CONFIG, "tgts: %p size: %d\n",
 562                        lov->lov_tgts, lov->lov_tgt_size);
 563         }
 564
 565         tgt = kzalloc(sizeof(*tgt), GFP_NOFS);
 566         if (!tgt) {
 567                 mutex_unlock(&lov->lov_lock);
 568                 return -ENOMEM;
 569         }
 570
 571         rc = lov_ost_pool_add(&lov->lov_packed, index, lov->lov_tgt_size);
 572         if (rc) {
 573                 mutex_unlock(&lov->lov_lock);
 574                 kfree(tgt);
 575                 return rc;
 576         }
 577
 578         tgt->ltd_uuid = *uuidp;
 579         tgt->ltd_obd = tgt_obd;
 580         /* XXX - add a sanity check on the generation number. */
 581         tgt->ltd_gen = gen;
 582         tgt->ltd_index = index;
 583         tgt->ltd_activate = active;
 584         lov->lov_tgts[index] = tgt;
 585         if (index >= lov->desc.ld_tgt_count)
 586                 lov->desc.ld_tgt_count = index + 1;
 587
 588         mutex_unlock(&lov->lov_lock);
 589
 590         CDEBUG(D_CONFIG, "idx=%d ltd_gen=%d ld_tgt_count=%d\n",
 591                index, tgt->ltd_gen, lov->desc.ld_tgt_count);
 592
 593         rc = obd_notify(obd, tgt_obd, OBD_NOTIFY_CREATE, &index);
 594
 595         if (lov->lov_connects == 0) {
 596                 /* lov_connect hasn't been called yet. We'll do the
 597                  * lov_connect_obd on this target when that fn first runs,
 598                  * because we don't know the connect flags yet.
 599                  */
 600                 return 0;
 601         }
 602
 603         obd_getref(obd);
 604
 605         rc = lov_connect_obd(obd, index, active, &lov->lov_ocd);
 606         if (rc)
 607                 goto out;
 608
 609         /* connect to administrative disabled ost */
 610         if (!tgt->ltd_exp) {
 611                 rc = 0;
 612                 goto out;
 613         }
 614
 615         if (lov->lov_cache) {
 616                 rc = obd_set_info_async(NULL, tgt->ltd_exp,
 617                                         sizeof(KEY_CACHE_SET), KEY_CACHE_SET,
 618                                         sizeof(struct cl_client_cache),
 619                                         lov->lov_cache, NULL);
 620                 if (rc < 0)
 621                         goto out;
 622         }
 623
 624         rc = lov_notify(obd, tgt->ltd_exp->exp_obd,
 625                         active ? OBD_NOTIFY_CONNECT : OBD_NOTIFY_INACTIVE,
 626                         (void *)&index);
 627
 628 out:
 629         if (rc) {
 630                 CERROR("add failed (%d), deleting %s\n", rc,
 631                        obd_uuid2str(&tgt->ltd_uuid));
 632                 lov_del_target(obd, index, NULL, 0);
 633         }
 634         obd_putref(obd);
 635         return rc;
 636 }
 637
 638 /* Schedule a target for deletion */
 639 int lov_del_target(struct obd_device *obd, __u32 index,
 640                    struct obd_uuid *uuidp, int gen)
 641 {
 642         struct lov_obd *lov = &obd->u.lov;
 643         int count = lov->desc.ld_tgt_count;
 644         int rc = 0;
 645
 646         if (index >= count) {
 647                 CERROR("LOV target index %d >= number of LOV OBDs %d.\n",
 648                        index, count);
 649                 return -EINVAL;
 650         }
 651
 652         /* to make sure there's no ongoing lov_notify() now */
 653         down_write(&lov->lov_notify_lock);
 654         obd_getref(obd);
 655
 656         if (!lov->lov_tgts[index]) {
 657                 CERROR("LOV target at index %d is not setup.\n", index);
 658                 rc = -EINVAL;
 659                 goto out;
 660         }
 661
 662         if (uuidp && !obd_uuid_equals(uuidp, &lov->lov_tgts[index]->ltd_uuid)) {
 663                 CERROR("LOV target UUID %s at index %d doesn't match %s.\n",
 664                        lov_uuid2str(lov, index), index,
 665                        obd_uuid2str(uuidp));
 666                 rc = -EINVAL;
 667                 goto out;
 668         }
 669
 670         CDEBUG(D_CONFIG, "uuid: %s idx: %d gen: %d exp: %p active: %d\n",
 671                lov_uuid2str(lov, index), index,
 672                lov->lov_tgts[index]->ltd_gen, lov->lov_tgts[index]->ltd_exp,
 673                lov->lov_tgts[index]->ltd_active);
 674
 675         lov->lov_tgts[index]->ltd_reap = 1;
 676         lov->lov_death_row++;
 677         /* we really delete it from obd_putref */
 678 out:
 679         obd_putref(obd);
 680         up_write(&lov->lov_notify_lock);
 681
 682         return rc;
 683 }
 684
 685 static void __lov_del_obd(struct obd_device *obd, struct lov_tgt_desc *tgt)
 686 {
 687         struct obd_device *osc_obd;
 688
 689         LASSERT(tgt);
 690         LASSERT(tgt->ltd_reap);
 691
 692         osc_obd = class_exp2obd(tgt->ltd_exp);
 693
 694         CDEBUG(D_CONFIG, "Removing tgt %s : %s\n",
 695                tgt->ltd_uuid.uuid,
 696                osc_obd ? osc_obd->obd_name : "<no obd>");
 697
 698         if (tgt->ltd_exp)
 699                 lov_disconnect_obd(obd, tgt);
 700
 701         kfree(tgt);
 702
 703         /* Manual cleanup - no cleanup logs to clean up the osc's.  We must
 704          * do it ourselves. And we can't do it from lov_cleanup,
 705          * because we just lost our only reference to it.
 706          */
 707         if (osc_obd)
 708                 class_manual_cleanup(osc_obd);
 709 }
 710
 711 void lov_fix_desc_stripe_size(__u64 *val)
 712 {
 713         if (*val < LOV_MIN_STRIPE_SIZE) {
 714                 if (*val != 0)
 715                         LCONSOLE_INFO("Increasing default stripe size to minimum %u\n",
 716                                       LOV_DESC_STRIPE_SIZE_DEFAULT);
 717                 *val = LOV_DESC_STRIPE_SIZE_DEFAULT;
 718         } else if (*val & (LOV_MIN_STRIPE_SIZE - 1)) {
 719                 *val &= ~(LOV_MIN_STRIPE_SIZE - 1);
 720                 LCONSOLE_WARN("Changing default stripe size to %llu (a multiple of %u)\n",
 721                               *val, LOV_MIN_STRIPE_SIZE);
 722         }
 723 }
 724
 725 void lov_fix_desc_stripe_count(__u32 *val)
 726 {
 727         if (*val == 0)
 728                 *val = 1;
 729 }
 730
 731 void lov_fix_desc_pattern(__u32 *val)
 732 {
 733         /* from lov_setstripe */
 734         if ((*val != 0) && (*val != LOV_PATTERN_RAID0)) {
 735                 LCONSOLE_WARN("Unknown stripe pattern: %#x\n", *val);
 736                 *val = 0;
 737         }
 738 }
 739
 740 void lov_fix_desc_qos_maxage(__u32 *val)
 741 {
 742         if (*val == 0)
 743                 *val = LOV_DESC_QOS_MAXAGE_DEFAULT;
 744 }
 745
 746 void lov_fix_desc(struct lov_desc *desc)
 747 {
 748         lov_fix_desc_stripe_size(&desc->ld_default_stripe_size);
 749         lov_fix_desc_stripe_count(&desc->ld_default_stripe_count);
 750         lov_fix_desc_pattern(&desc->ld_pattern);
 751         lov_fix_desc_qos_maxage(&desc->ld_qos_maxage);
 752 }
 753
 754 int lov_setup(struct obd_device *obd, struct lustre_cfg *lcfg)
 755 {
 756         struct lprocfs_static_vars lvars = { NULL };
 757         struct lov_desc *desc;
 758         struct lov_obd *lov = &obd->u.lov;
 759         int rc;
 760
 761         if (LUSTRE_CFG_BUFLEN(lcfg, 1) < 1) {
 762                 CERROR("LOV setup requires a descriptor\n");
 763                 return -EINVAL;
 764         }
 765
 766         desc = (struct lov_desc *)lustre_cfg_buf(lcfg, 1);
 767
 768         if (sizeof(*desc) > LUSTRE_CFG_BUFLEN(lcfg, 1)) {
 769                 CERROR("descriptor size wrong: %d > %d\n",
 770                        (int)sizeof(*desc), LUSTRE_CFG_BUFLEN(lcfg, 1));
 771                 return -EINVAL;
 772         }
 773
 774         if (desc->ld_magic != LOV_DESC_MAGIC) {
 775                 if (desc->ld_magic == __swab32(LOV_DESC_MAGIC)) {
 776                         CDEBUG(D_OTHER, "%s: Swabbing lov desc %p\n",
 777                                obd->obd_name, desc);
 778                         lustre_swab_lov_desc(desc);
 779                 } else {
 780                         CERROR("%s: Bad lov desc magic: %#x\n",
 781                                obd->obd_name, desc->ld_magic);
 782                         return -EINVAL;
 783                 }
 784         }
 785
 786         lov_fix_desc(desc);
 787
 788         desc->ld_active_tgt_count = 0;
 789         lov->desc = *desc;
 790         lov->lov_tgt_size = 0;
 791
 792         mutex_init(&lov->lov_lock);
 793         atomic_set(&lov->lov_refcount, 0);
 794         lov->lov_sp_me = LUSTRE_SP_CLI;
 795
 796         init_rwsem(&lov->lov_notify_lock);
 797
 798         lov->lov_pools_hash_body = cfs_hash_create("POOLS", HASH_POOLS_CUR_BITS,
 799                                                    HASH_POOLS_MAX_BITS,
 800                                                    HASH_POOLS_BKT_BITS, 0,
 801                                                    CFS_HASH_MIN_THETA,
 802                                                    CFS_HASH_MAX_THETA,
 803                                                    &pool_hash_operations,
 804                                                    CFS_HASH_DEFAULT);
 805         INIT_LIST_HEAD(&lov->lov_pool_list);
 806         lov->lov_pool_count = 0;
 807         rc = lov_ost_pool_init(&lov->lov_packed, 0);
 808         if (rc)
 809                 goto out;
 810
 811         lprocfs_lov_init_vars(&lvars);
 812         lprocfs_obd_setup(obd, lvars.obd_vars, lvars.sysfs_vars);
 813
 814         rc = ldebugfs_seq_create(obd->obd_debugfs_entry, "target_obd",
 815                                  0444, &lov_proc_target_fops, obd);
 816         if (rc)
 817                 CWARN("Error adding the target_obd file\n");
 818
 819         lov->lov_pool_debugfs_entry = ldebugfs_register("pools",
 820                                                      obd->obd_debugfs_entry,
 821                                                      NULL, NULL);
 822         return 0;
 823
 824 out:
 825         return rc;
 826 }
 827
 828 static int lov_precleanup(struct obd_device *obd, enum obd_cleanup_stage stage)
 829 {
 830         struct lov_obd *lov = &obd->u.lov;
 831
 832         switch (stage) {
 833         case OBD_CLEANUP_EARLY: {
 834                 int i;
 835
 836                 for (i = 0; i < lov->desc.ld_tgt_count; i++) {
 837                         if (!lov->lov_tgts[i] || !lov->lov_tgts[i]->ltd_active)
 838                                 continue;
 839                         obd_precleanup(class_exp2obd(lov->lov_tgts[i]->ltd_exp),
 840                                        OBD_CLEANUP_EARLY);
 841                 }
 842                 break;
 843         }
 844         default:
 845                 break;
 846         }
 847
 848         return 0;
 849 }
 850
 851 static int lov_cleanup(struct obd_device *obd)
 852 {
 853         struct lov_obd *lov = &obd->u.lov;
 854         struct list_head *pos, *tmp;
 855         struct pool_desc *pool;
 856
 857         list_for_each_safe(pos, tmp, &lov->lov_pool_list) {
 858                 pool = list_entry(pos, struct pool_desc, pool_list);
 859                 /* free pool structs */
 860                 CDEBUG(D_INFO, "delete pool %p\n", pool);
 861                 /* In the function below, .hs_keycmp resolves to
 862                  * pool_hashkey_keycmp()
 863                  */
 864                 /* coverity[overrun-buffer-val] */
 865                 lov_pool_del(obd, pool->pool_name);
 866         }
 867         cfs_hash_putref(lov->lov_pools_hash_body);
 868         lov_ost_pool_free(&lov->lov_packed);
 869
 870         lprocfs_obd_cleanup(obd);
 871         if (lov->lov_tgts) {
 872                 int i;
 873
 874                 obd_getref(obd);
 875                 for (i = 0; i < lov->desc.ld_tgt_count; i++) {
 876                         if (!lov->lov_tgts[i])
 877                                 continue;
 878
 879                         /* Inactive targets may never have connected */
 880                         if (lov->lov_tgts[i]->ltd_active ||
 881                             atomic_read(&lov->lov_refcount))
 882                             /* We should never get here - these
 883                              * should have been removed in the
 884                              * disconnect.
 885                              */
 886                                 CERROR("lov tgt %d not cleaned! deathrow=%d, lovrc=%d\n",
 887                                        i, lov->lov_death_row,
 888                                        atomic_read(&lov->lov_refcount));
 889                         lov_del_target(obd, i, NULL, 0);
 890                 }
 891                 obd_putref(obd);
 892                 kfree(lov->lov_tgts);
 893                 lov->lov_tgt_size = 0;
 894         }
 895
 896         if (lov->lov_cache) {
 897                 cl_cache_decref(lov->lov_cache);
 898                 lov->lov_cache = NULL;
 899         }
 900
 901         return 0;
 902 }
 903
 904 int lov_process_config_base(struct obd_device *obd, struct lustre_cfg *lcfg,
 905                             __u32 *indexp, int *genp)
 906 {
 907         struct obd_uuid obd_uuid;
 908         int cmd;
 909         int rc = 0;
 910
 911         switch (cmd = lcfg->lcfg_command) {
 912         case LCFG_LOV_ADD_OBD:
 913         case LCFG_LOV_ADD_INA:
 914         case LCFG_LOV_DEL_OBD: {
 915                 __u32 index;
 916                 int gen;
 917                 /* lov_modify_tgts add  0:lov_mdsA  1:ost1_UUID  2:0  3:1 */
 918                 if (LUSTRE_CFG_BUFLEN(lcfg, 1) > sizeof(obd_uuid.uuid)) {
 919                         rc = -EINVAL;
 920                         goto out;
 921                 }
 922
 923                 obd_str2uuid(&obd_uuid,  lustre_cfg_buf(lcfg, 1));
 924
 925                 rc = kstrtoint(lustre_cfg_buf(lcfg, 2), 10, indexp);
 926                 if (rc < 0)
 927                         goto out;
 928                 rc = kstrtoint(lustre_cfg_buf(lcfg, 3), 10, genp);
 929                 if (rc < 0)
 930                         goto out;
 931                 index = *indexp;
 932                 gen = *genp;
 933                 if (cmd == LCFG_LOV_ADD_OBD)
 934                         rc = lov_add_target(obd, &obd_uuid, index, gen, 1);
 935                 else if (cmd == LCFG_LOV_ADD_INA)
 936                         rc = lov_add_target(obd, &obd_uuid, index, gen, 0);
 937                 else
 938                         rc = lov_del_target(obd, index, &obd_uuid, gen);
 939                 goto out;
 940         }
 941         case LCFG_PARAM: {
 942                 struct lprocfs_static_vars lvars = { NULL };
 943                 struct lov_desc *desc = &(obd->u.lov.desc);
 944
 945                 if (!desc) {
 946                         rc = -EINVAL;
 947                         goto out;
 948                 }
 949
 950                 lprocfs_lov_init_vars(&lvars);
 951
 952                 rc = class_process_proc_param(PARAM_LOV, lvars.obd_vars,
 953                                               lcfg, obd);
 954                 if (rc > 0)
 955                         rc = 0;
 956                 goto out;
 957         }
 958         case LCFG_POOL_NEW:
 959         case LCFG_POOL_ADD:
 960         case LCFG_POOL_DEL:
 961         case LCFG_POOL_REM:
 962                 goto out;
 963
 964         default: {
 965                 CERROR("Unknown command: %d\n", lcfg->lcfg_command);
 966                 rc = -EINVAL;
 967                 goto out;
 968         }
 969         }
 970 out:
 971         return rc;
 972 }
 973
 974 static int lov_recreate(struct obd_export *exp, struct obdo *src_oa,
 975                         struct lov_stripe_md **ea, struct obd_trans_info *oti)
 976 {
 977         struct lov_stripe_md *obj_mdp, *lsm;
 978         struct lov_obd *lov = &exp->exp_obd->u.lov;
 979         unsigned ost_idx;
 980         int rc, i;
 981
 982         LASSERT(src_oa->o_valid & OBD_MD_FLFLAGS &&
 983                 src_oa->o_flags & OBD_FL_RECREATE_OBJS);
 984
 985         obj_mdp = kzalloc(sizeof(*obj_mdp), GFP_NOFS);
 986         if (!obj_mdp)
 987                 return -ENOMEM;
 988
 989         ost_idx = src_oa->o_nlink;
 990         lsm = *ea;
 991         if (!lsm) {
 992                 rc = -EINVAL;
 993                 goto out;
 994         }
 995         if (ost_idx >= lov->desc.ld_tgt_count ||
 996             !lov->lov_tgts[ost_idx]) {
 997                 rc = -EINVAL;
 998                 goto out;
 999         }
1000
1001         for (i = 0; i < lsm->lsm_stripe_count; i++) {
1002                 struct lov_oinfo *loi = lsm->lsm_oinfo[i];
1003
1004                 if (lov_oinfo_is_dummy(loi))
1005                         continue;
1006
1007                 if (loi->loi_ost_idx == ost_idx) {
1008                         if (ostid_id(&loi->loi_oi) != ostid_id(&src_oa->o_oi)) {
1009                                 rc = -EINVAL;
1010                                 goto out;
1011                         }
1012                         break;
1013                 }
1014         }
1015         if (i == lsm->lsm_stripe_count) {
1016                 rc = -EINVAL;
1017                 goto out;
1018         }
1019
1020         rc = obd_create(NULL, lov->lov_tgts[ost_idx]->ltd_exp,
1021                         src_oa, &obj_mdp, oti);
1022 out:
1023         kfree(obj_mdp);
1024         return rc;
1025 }
1026
1027 /* the LOV expects oa->o_id to be set to the LOV object id */
1028 static int lov_create(const struct lu_env *env, struct obd_export *exp,
1029                       struct obdo *src_oa, struct lov_stripe_md **ea,
1030                       struct obd_trans_info *oti)
1031 {
1032         struct lov_obd *lov;
1033         int rc = 0;
1034
1035         LASSERT(ea);
1036         if (!exp)
1037                 return -EINVAL;
1038
1039         if ((src_oa->o_valid & OBD_MD_FLFLAGS) &&
1040             src_oa->o_flags == OBD_FL_DELORPHAN) {
1041                 /* should be used with LOV anymore */
1042                 LBUG();
1043         }
1044
1045         lov = &exp->exp_obd->u.lov;
1046         if (!lov->desc.ld_active_tgt_count)
1047                 return -EIO;
1048
1049         obd_getref(exp->exp_obd);
1050         /* Recreate a specific object id at the given OST index */
1051         if ((src_oa->o_valid & OBD_MD_FLFLAGS) &&
1052             (src_oa->o_flags & OBD_FL_RECREATE_OBJS)) {
1053                 rc = lov_recreate(exp, src_oa, ea, oti);
1054         }
1055
1056         obd_putref(exp->exp_obd);
1057         return rc;
1058 }
1059
1060 #define ASSERT_LSM_MAGIC(lsmp)                                            \
1061 do {                                                                        \
1062         LASSERT((lsmp));                                                \
1063         LASSERTF(((lsmp)->lsm_magic == LOV_MAGIC_V1 ||                    \
1064                  (lsmp)->lsm_magic == LOV_MAGIC_V3),                        \
1065                  "%p->lsm_magic=%x\n", (lsmp), (lsmp)->lsm_magic);            \
1066 } while (0)
1067
1068 static int lov_destroy(const struct lu_env *env, struct obd_export *exp,
1069                        struct obdo *oa, struct lov_stripe_md *lsm,
1070                        struct obd_trans_info *oti, struct obd_export *md_exp)
1071 {
1072         struct lov_request_set *set;
1073         struct obd_info oinfo;
1074         struct lov_request *req;
1075         struct lov_obd *lov;
1076         int rc = 0, err = 0;
1077
1078         ASSERT_LSM_MAGIC(lsm);
1079
1080         if (!exp || !exp->exp_obd)
1081                 return -ENODEV;
1082
1083         if (oa->o_valid & OBD_MD_FLCOOKIE) {
1084                 LASSERT(oti);
1085                 LASSERT(oti->oti_logcookies);
1086         }
1087
1088         lov = &exp->exp_obd->u.lov;
1089         obd_getref(exp->exp_obd);
1090         rc = lov_prep_destroy_set(exp, &oinfo, oa, lsm, oti, &set);
1091         if (rc)
1092                 goto out;
1093
1094         list_for_each_entry(req, &set->set_list, rq_link) {
1095                 if (oa->o_valid & OBD_MD_FLCOOKIE)
1096                         oti->oti_logcookies = set->set_cookies + req->rq_stripe;
1097
1098                 err = obd_destroy(env, lov->lov_tgts[req->rq_idx]->ltd_exp,
1099                                   req->rq_oi.oi_oa, NULL, oti, NULL);
1100                 err = lov_update_common_set(set, req, err);
1101                 if (err) {
1102                         CERROR("%s: destroying objid "DOSTID" subobj "
1103                                DOSTID" on OST idx %d: rc = %d\n",
1104                                exp->exp_obd->obd_name, POSTID(&oa->o_oi),
1105                                POSTID(&req->rq_oi.oi_oa->o_oi),
1106                                req->rq_idx, err);
1107                         if (!rc)
1108                                 rc = err;
1109                 }
1110         }
1111
1112         if (rc == 0)
1113                 rc = lsm_op_find(lsm->lsm_magic)->lsm_destroy(lsm, oa, md_exp);
1114
1115         err = lov_fini_destroy_set(set);
1116 out:
1117         obd_putref(exp->exp_obd);
1118         return rc ? rc : err;
1119 }
1120
1121 static int lov_getattr_interpret(struct ptlrpc_request_set *rqset,
1122                                  void *data, int rc)
1123 {
1124         struct lov_request_set *lovset = (struct lov_request_set *)data;
1125         int err;
1126
1127         /* don't do attribute merge if this async op failed */
1128         if (rc)
1129                 atomic_set(&lovset->set_completes, 0);
1130         err = lov_fini_getattr_set(lovset);
1131         return rc ? rc : err;
1132 }
1133
1134 static int lov_getattr_async(struct obd_export *exp, struct obd_info *oinfo,
1135                              struct ptlrpc_request_set *rqset)
1136 {
1137         struct lov_request_set *lovset;
1138         struct lov_obd *lov;
1139         struct lov_request *req;
1140         int rc = 0, err;
1141
1142         LASSERT(oinfo);
1143         ASSERT_LSM_MAGIC(oinfo->oi_md);
1144
1145         if (!exp || !exp->exp_obd)
1146                 return -ENODEV;
1147
1148         lov = &exp->exp_obd->u.lov;
1149
1150         rc = lov_prep_getattr_set(exp, oinfo, &lovset);
1151         if (rc)
1152                 return rc;
1153
1154         CDEBUG(D_INFO, "objid "DOSTID": %ux%u byte stripes\n",
1155                POSTID(&oinfo->oi_md->lsm_oi), oinfo->oi_md->lsm_stripe_count,
1156                oinfo->oi_md->lsm_stripe_size);
1157
1158         list_for_each_entry(req, &lovset->set_list, rq_link) {
1159                 CDEBUG(D_INFO, "objid " DOSTID "[%d] has subobj " DOSTID " at idx%u\n",
1160                        POSTID(&oinfo->oi_oa->o_oi), req->rq_stripe,
1161                        POSTID(&req->rq_oi.oi_oa->o_oi), req->rq_idx);
1162                 rc = obd_getattr_async(lov->lov_tgts[req->rq_idx]->ltd_exp,
1163                                        &req->rq_oi, rqset);
1164                 if (rc) {
1165                         CERROR("%s: getattr objid "DOSTID" subobj"
1166                                DOSTID" on OST idx %d: rc = %d\n",
1167                                exp->exp_obd->obd_name,
1168                                POSTID(&oinfo->oi_oa->o_oi),
1169                                POSTID(&req->rq_oi.oi_oa->o_oi),
1170                                req->rq_idx, rc);
1171                         goto out;
1172                 }
1173         }
1174
1175         if (!list_empty(&rqset->set_requests)) {
1176                 LASSERT(rc == 0);
1177                 LASSERT(!rqset->set_interpret);
1178                 rqset->set_interpret = lov_getattr_interpret;
1179                 rqset->set_arg = (void *)lovset;
1180                 return rc;
1181         }
1182 out:
1183         if (rc)
1184                 atomic_set(&lovset->set_completes, 0);
1185         err = lov_fini_getattr_set(lovset);
1186         return rc ? rc : err;
1187 }
1188
1189 static int lov_setattr_interpret(struct ptlrpc_request_set *rqset,
1190                                  void *data, int rc)
1191 {
1192         struct lov_request_set *lovset = (struct lov_request_set *)data;
1193         int err;
1194
1195         if (rc)
1196                 atomic_set(&lovset->set_completes, 0);
1197         err = lov_fini_setattr_set(lovset);
1198         return rc ? rc : err;
1199 }
1200
1201 /* If @oti is given, the request goes from MDS and responses from OSTs are not
1202  * needed. Otherwise, a client is waiting for responses.
1203  */
1204 static int lov_setattr_async(struct obd_export *exp, struct obd_info *oinfo,
1205                              struct obd_trans_info *oti,
1206                              struct ptlrpc_request_set *rqset)
1207 {
1208         struct lov_request_set *set;
1209         struct lov_request *req;
1210         struct lov_obd *lov;
1211         int rc = 0;
1212
1213         LASSERT(oinfo);
1214         ASSERT_LSM_MAGIC(oinfo->oi_md);
1215         if (oinfo->oi_oa->o_valid & OBD_MD_FLCOOKIE) {
1216                 LASSERT(oti);
1217                 LASSERT(oti->oti_logcookies);
1218         }
1219
1220         if (!exp || !exp->exp_obd)
1221                 return -ENODEV;
1222
1223         lov = &exp->exp_obd->u.lov;
1224         rc = lov_prep_setattr_set(exp, oinfo, oti, &set);
1225         if (rc)
1226                 return rc;
1227
1228         CDEBUG(D_INFO, "objid "DOSTID": %ux%u byte stripes\n",
1229                POSTID(&oinfo->oi_md->lsm_oi),
1230                oinfo->oi_md->lsm_stripe_count,
1231                oinfo->oi_md->lsm_stripe_size);
1232
1233         list_for_each_entry(req, &set->set_list, rq_link) {
1234                 if (oinfo->oi_oa->o_valid & OBD_MD_FLCOOKIE)
1235                         oti->oti_logcookies = set->set_cookies + req->rq_stripe;
1236
1237                 CDEBUG(D_INFO, "objid " DOSTID "[%d] has subobj " DOSTID " at idx%u\n",
1238                        POSTID(&oinfo->oi_oa->o_oi), req->rq_stripe,
1239                        POSTID(&req->rq_oi.oi_oa->o_oi), req->rq_idx);
1240
1241                 rc = obd_setattr_async(lov->lov_tgts[req->rq_idx]->ltd_exp,
1242                                        &req->rq_oi, oti, rqset);
1243                 if (rc) {
1244                         CERROR("error: setattr objid "DOSTID" subobj"
1245                                DOSTID" on OST idx %d: rc = %d\n",
1246                                POSTID(&set->set_oi->oi_oa->o_oi),
1247                                POSTID(&req->rq_oi.oi_oa->o_oi),
1248                                req->rq_idx, rc);
1249                         break;
1250                 }
1251         }
1252
1253         /* If we are not waiting for responses on async requests, return. */
1254         if (rc || !rqset || list_empty(&rqset->set_requests)) {
1255                 int err;
1256
1257                 if (rc)
1258                         atomic_set(&set->set_completes, 0);
1259                 err = lov_fini_setattr_set(set);
1260                 return rc ? rc : err;
1261         }
1262
1263         LASSERT(!rqset->set_interpret);
1264         rqset->set_interpret = lov_setattr_interpret;
1265         rqset->set_arg = (void *)set;
1266
1267         return 0;
1268 }
1269
1270 /* find any ldlm lock of the inode in lov
1271  * return 0    not find
1272  *      1    find one
1273  *      < 0    error
1274  */
1275 static int lov_find_cbdata(struct obd_export *exp,
1276                            struct lov_stripe_md *lsm, ldlm_iterator_t it,
1277                            void *data)
1278 {
1279         struct lov_obd *lov;
1280         int rc = 0, i;
1281
1282         ASSERT_LSM_MAGIC(lsm);
1283
1284         if (!exp || !exp->exp_obd)
1285                 return -ENODEV;
1286
1287         lov = &exp->exp_obd->u.lov;
1288         for (i = 0; i < lsm->lsm_stripe_count; i++) {
1289                 struct lov_stripe_md submd;
1290                 struct lov_oinfo *loi = lsm->lsm_oinfo[i];
1291
1292                 if (lov_oinfo_is_dummy(loi))
1293                         continue;
1294
1295                 if (!lov->lov_tgts[loi->loi_ost_idx]) {
1296                         CDEBUG(D_HA, "lov idx %d NULL\n", loi->loi_ost_idx);
1297                         continue;
1298                 }
1299
1300                 submd.lsm_oi = loi->loi_oi;
1301                 submd.lsm_stripe_count = 0;
1302                 rc = obd_find_cbdata(lov->lov_tgts[loi->loi_ost_idx]->ltd_exp,
1303                                      &submd, it, data);
1304                 if (rc != 0)
1305                         return rc;
1306         }
1307         return rc;
1308 }
1309
1310 int lov_statfs_interpret(struct ptlrpc_request_set *rqset, void *data, int rc)
1311 {
1312         struct lov_request_set *lovset = (struct lov_request_set *)data;
1313         int err;
1314
1315         if (rc)
1316                 atomic_set(&lovset->set_completes, 0);
1317
1318         err = lov_fini_statfs_set(lovset);
1319         return rc ? rc : err;
1320 }
1321
1322 static int lov_statfs_async(struct obd_export *exp, struct obd_info *oinfo,
1323                             __u64 max_age, struct ptlrpc_request_set *rqset)
1324 {
1325         struct obd_device      *obd = class_exp2obd(exp);
1326         struct lov_request_set *set;
1327         struct lov_request *req;
1328         struct lov_obd *lov;
1329         int rc = 0;
1330
1331         LASSERT(oinfo->oi_osfs);
1332
1333         lov = &obd->u.lov;
1334         rc = lov_prep_statfs_set(obd, oinfo, &set);
1335         if (rc)
1336                 return rc;
1337
1338         list_for_each_entry(req, &set->set_list, rq_link) {
1339                 rc = obd_statfs_async(lov->lov_tgts[req->rq_idx]->ltd_exp,
1340                                       &req->rq_oi, max_age, rqset);
1341                 if (rc)
1342                         break;
1343         }
1344
1345         if (rc || list_empty(&rqset->set_requests)) {
1346                 int err;
1347
1348                 if (rc)
1349                         atomic_set(&set->set_completes, 0);
1350                 err = lov_fini_statfs_set(set);
1351                 return rc ? rc : err;
1352         }
1353
1354         LASSERT(!rqset->set_interpret);
1355         rqset->set_interpret = lov_statfs_interpret;
1356         rqset->set_arg = (void *)set;
1357         return 0;
1358 }
1359
1360 static int lov_statfs(const struct lu_env *env, struct obd_export *exp,
1361                       struct obd_statfs *osfs, __u64 max_age, __u32 flags)
1362 {
1363         struct ptlrpc_request_set *set = NULL;
1364         struct obd_info oinfo = { };
1365         int rc = 0;
1366
1367         /* for obdclass we forbid using obd_statfs_rqset, but prefer using async
1368          * statfs requests
1369          */
1370         set = ptlrpc_prep_set();
1371         if (!set)
1372                 return -ENOMEM;
1373
1374         oinfo.oi_osfs = osfs;
1375         oinfo.oi_flags = flags;
1376         rc = lov_statfs_async(exp, &oinfo, max_age, set);
1377         if (rc == 0)
1378                 rc = ptlrpc_set_wait(set);
1379         ptlrpc_set_destroy(set);
1380
1381         return rc;
1382 }
1383
1384 static int lov_iocontrol(unsigned int cmd, struct obd_export *exp, int len,
1385                          void *karg, void __user *uarg)
1386 {
1387         struct obd_device *obddev = class_exp2obd(exp);
1388         struct lov_obd *lov = &obddev->u.lov;
1389         int i = 0, rc = 0, count = lov->desc.ld_tgt_count;
1390         struct obd_uuid *uuidp;
1391
1392         switch (cmd) {
1393         case IOC_OBD_STATFS: {
1394                 struct obd_ioctl_data *data = karg;
1395                 struct obd_device *osc_obd;
1396                 struct obd_statfs stat_buf = {0};
1397                 __u32 index;
1398                 __u32 flags;
1399
1400                 memcpy(&index, data->ioc_inlbuf2, sizeof(__u32));
1401                 if (index >= count)
1402                         return -ENODEV;
1403
1404                 if (!lov->lov_tgts[index])
1405                         /* Try again with the next index */
1406                         return -EAGAIN;
1407                 if (!lov->lov_tgts[index]->ltd_active)
1408                         return -ENODATA;
1409
1410                 osc_obd = class_exp2obd(lov->lov_tgts[index]->ltd_exp);
1411                 if (!osc_obd)
1412                         return -EINVAL;
1413
1414                 /* copy UUID */
1415                 if (copy_to_user(data->ioc_pbuf2, obd2cli_tgt(osc_obd),
1416                                  min((int)data->ioc_plen2,
1417                                      (int)sizeof(struct obd_uuid))))
1418                         return -EFAULT;
1419
1420                 memcpy(&flags, data->ioc_inlbuf1, sizeof(__u32));
1421                 flags = flags & LL_STATFS_NODELAY ? OBD_STATFS_NODELAY : 0;
1422
1423                 /* got statfs data */
1424                 rc = obd_statfs(NULL, lov->lov_tgts[index]->ltd_exp, &stat_buf,
1425                                 cfs_time_shift_64(-OBD_STATFS_CACHE_SECONDS),
1426                                 flags);
1427                 if (rc)
1428                         return rc;
1429                 if (copy_to_user(data->ioc_pbuf1, &stat_buf,
1430                                  min((int)data->ioc_plen1,
1431                                      (int)sizeof(stat_buf))))
1432                         return -EFAULT;
1433                 break;
1434         }
1435         case OBD_IOC_LOV_GET_CONFIG: {
1436                 struct obd_ioctl_data *data;
1437                 struct lov_desc *desc;
1438                 char *buf = NULL;
1439                 __u32 *genp;
1440
1441                 len = 0;
1442                 if (obd_ioctl_getdata(&buf, &len, uarg))
1443                         return -EINVAL;
1444
1445                 data = (struct obd_ioctl_data *)buf;
1446
1447                 if (sizeof(*desc) > data->ioc_inllen1) {
1448                         obd_ioctl_freedata(buf, len);
1449                         return -EINVAL;
1450                 }
1451
1452                 if (sizeof(uuidp->uuid) * count > data->ioc_inllen2) {
1453                         obd_ioctl_freedata(buf, len);
1454                         return -EINVAL;
1455                 }
1456
1457                 if (sizeof(__u32) * count > data->ioc_inllen3) {
1458                         obd_ioctl_freedata(buf, len);
1459                         return -EINVAL;
1460                 }
1461
1462                 desc = (struct lov_desc *)data->ioc_inlbuf1;
1463                 memcpy(desc, &(lov->desc), sizeof(*desc));
1464
1465                 uuidp = (struct obd_uuid *)data->ioc_inlbuf2;
1466                 genp = (__u32 *)data->ioc_inlbuf3;
1467                 /* the uuid will be empty for deleted OSTs */
1468                 for (i = 0; i < count; i++, uuidp++, genp++) {
1469                         if (!lov->lov_tgts[i])
1470                                 continue;
1471                         *uuidp = lov->lov_tgts[i]->ltd_uuid;
1472                         *genp = lov->lov_tgts[i]->ltd_gen;
1473                 }
1474
1475                 if (copy_to_user(uarg, buf, len))
1476                         rc = -EFAULT;
1477                 obd_ioctl_freedata(buf, len);
1478                 break;
1479         }
1480         case LL_IOC_LOV_GETSTRIPE:
1481                 rc = lov_getstripe(exp, karg, uarg);
1482                 break;
1483         case OBD_IOC_QUOTACTL: {
1484                 struct if_quotactl *qctl = karg;
1485                 struct lov_tgt_desc *tgt = NULL;
1486                 struct obd_quotactl *oqctl;
1487
1488                 if (qctl->qc_valid == QC_OSTIDX) {
1489                         if (count <= qctl->qc_idx)
1490                                 return -EINVAL;
1491
1492                         tgt = lov->lov_tgts[qctl->qc_idx];
1493                         if (!tgt || !tgt->ltd_exp)
1494                                 return -EINVAL;
1495                 } else if (qctl->qc_valid == QC_UUID) {
1496                         for (i = 0; i < count; i++) {
1497                                 tgt = lov->lov_tgts[i];
1498                                 if (!tgt ||
1499                                     !obd_uuid_equals(&tgt->ltd_uuid,
1500                                                      &qctl->obd_uuid))
1501                                         continue;
1502
1503                                 if (!tgt->ltd_exp)
1504                                         return -EINVAL;
1505
1506                                 break;
1507                         }
1508                 } else {
1509                         return -EINVAL;
1510                 }
1511
1512                 if (i >= count)
1513                         return -EAGAIN;
1514
1515                 LASSERT(tgt && tgt->ltd_exp);
1516                 oqctl = kzalloc(sizeof(*oqctl), GFP_NOFS);
1517                 if (!oqctl)
1518                         return -ENOMEM;
1519
1520                 QCTL_COPY(oqctl, qctl);
1521                 rc = obd_quotactl(tgt->ltd_exp, oqctl);
1522                 if (rc == 0) {
1523                         QCTL_COPY(qctl, oqctl);
1524                         qctl->qc_valid = QC_OSTIDX;
1525                         qctl->obd_uuid = tgt->ltd_uuid;
1526                 }
1527                 kfree(oqctl);
1528                 break;
1529         }
1530         default: {
1531                 int set = 0;
1532
1533                 if (count == 0)
1534                         return -ENOTTY;
1535
1536                 for (i = 0; i < count; i++) {
1537                         int err;
1538                         struct obd_device *osc_obd;
1539
1540                         /* OST was disconnected */
1541                         if (!lov->lov_tgts[i] || !lov->lov_tgts[i]->ltd_exp)
1542                                 continue;
1543
1544                         /* ll_umount_begin() sets force flag but for lov, not
1545                          * osc. Let's pass it through
1546                          */
1547                         osc_obd = class_exp2obd(lov->lov_tgts[i]->ltd_exp);
1548                         osc_obd->obd_force = obddev->obd_force;
1549                         err = obd_iocontrol(cmd, lov->lov_tgts[i]->ltd_exp,
1550                                             len, karg, uarg);
1551                         if (err == -ENODATA && cmd == OBD_IOC_POLL_QUOTACHECK)
1552                                 return err;
1553                         if (err) {
1554                                 if (lov->lov_tgts[i]->ltd_active) {
1555                                         CDEBUG(err == -ENOTTY ?
1556                                                D_IOCTL : D_WARNING,
1557                                                "iocontrol OSC %s on OST idx %d cmd %x: err = %d\n",
1558                                                lov_uuid2str(lov, i),
1559                                                i, cmd, err);
1560                                         if (!rc)
1561                                                 rc = err;
1562                                 }
1563                         } else {
1564                                 set = 1;
1565                         }
1566                 }
1567                 if (!set && !rc)
1568                         rc = -EIO;
1569         }
1570         }
1571
1572         return rc;
1573 }
1574
1575 #define FIEMAP_BUFFER_SIZE 4096
1576
1577 /**
1578  * Non-zero fe_logical indicates that this is a continuation FIEMAP
1579  * call. The local end offset and the device are sent in the first
1580  * fm_extent. This function calculates the stripe number from the index.
1581  * This function returns a stripe_no on which mapping is to be restarted.
1582  *
1583  * This function returns fm_end_offset which is the in-OST offset at which
1584  * mapping should be restarted. If fm_end_offset=0 is returned then caller
1585  * will re-calculate proper offset in next stripe.
1586  * Note that the first extent is passed to lov_get_info via the value field.
1587  *
1588  * \param fiemap fiemap request header
1589  * \param lsm striping information for the file
1590  * \param fm_start logical start of mapping
1591  * \param fm_end logical end of mapping
1592  * \param start_stripe starting stripe will be returned in this
1593  */
1594 static u64 fiemap_calc_fm_end_offset(struct ll_user_fiemap *fiemap,
1595                                      struct lov_stripe_md *lsm, u64 fm_start,
1596                                      u64 fm_end, int *start_stripe)
1597 {
1598         u64 local_end = fiemap->fm_extents[0].fe_logical;
1599         u64 lun_start, lun_end;
1600         u64 fm_end_offset;
1601         int stripe_no = -1, i;
1602
1603         if (fiemap->fm_extent_count == 0 ||
1604             fiemap->fm_extents[0].fe_logical == 0)
1605                 return 0;
1606
1607         /* Find out stripe_no from ost_index saved in the fe_device */
1608         for (i = 0; i < lsm->lsm_stripe_count; i++) {
1609                 struct lov_oinfo *oinfo = lsm->lsm_oinfo[i];
1610
1611                 if (lov_oinfo_is_dummy(oinfo))
1612                         continue;
1613
1614                 if (oinfo->loi_ost_idx == fiemap->fm_extents[0].fe_device) {
1615                         stripe_no = i;
1616                         break;
1617                 }
1618         }
1619         if (stripe_no == -1)
1620                 return -EINVAL;
1621
1622         /* If we have finished mapping on previous device, shift logical
1623          * offset to start of next device
1624          */
1625         if ((lov_stripe_intersects(lsm, stripe_no, fm_start, fm_end,
1626                                    &lun_start, &lun_end)) != 0 &&
1627                                    local_end < lun_end) {
1628                 fm_end_offset = local_end;
1629                 *start_stripe = stripe_no;
1630         } else {
1631                 /* This is a special value to indicate that caller should
1632                  * calculate offset in next stripe.
1633                  */
1634                 fm_end_offset = 0;
1635                 *start_stripe = (stripe_no + 1) % lsm->lsm_stripe_count;
1636         }
1637
1638         return fm_end_offset;
1639 }
1640
1641 /**
1642  * We calculate on which OST the mapping will end. If the length of mapping
1643  * is greater than (stripe_size * stripe_count) then the last_stripe will
1644  * will be one just before start_stripe. Else we check if the mapping
1645  * intersects each OST and find last_stripe.
1646  * This function returns the last_stripe and also sets the stripe_count
1647  * over which the mapping is spread
1648  *
1649  * \param lsm striping information for the file
1650  * \param fm_start logical start of mapping
1651  * \param fm_end logical end of mapping
1652  * \param start_stripe starting stripe of the mapping
1653  * \param stripe_count the number of stripes across which to map is returned
1654  *
1655  * \retval last_stripe return the last stripe of the mapping
1656  */
1657 static int fiemap_calc_last_stripe(struct lov_stripe_md *lsm, u64 fm_start,
1658                                    u64 fm_end, int start_stripe,
1659                                    int *stripe_count)
1660 {
1661         int last_stripe;
1662         u64 obd_start, obd_end;
1663         int i, j;
1664
1665         if (fm_end - fm_start > lsm->lsm_stripe_size * lsm->lsm_stripe_count) {
1666                 last_stripe = start_stripe < 1 ? lsm->lsm_stripe_count - 1 :
1667                                                               start_stripe - 1;
1668                 *stripe_count = lsm->lsm_stripe_count;
1669         } else {
1670                 for (j = 0, i = start_stripe; j < lsm->lsm_stripe_count;
1671                      i = (i + 1) % lsm->lsm_stripe_count, j++) {
1672                         if ((lov_stripe_intersects(lsm, i, fm_start, fm_end,
1673                                                    &obd_start, &obd_end)) == 0)
1674                                 break;
1675                 }
1676                 *stripe_count = j;
1677                 last_stripe = (start_stripe + j - 1) % lsm->lsm_stripe_count;
1678         }
1679
1680         return last_stripe;
1681 }
1682
1683 /**
1684  * Set fe_device and copy extents from local buffer into main return buffer.
1685  *
1686  * \param fiemap fiemap request header
1687  * \param lcl_fm_ext array of local fiemap extents to be copied
1688  * \param ost_index OST index to be written into the fm_device field for each
1689                     extent
1690  * \param ext_count number of extents to be copied
1691  * \param current_extent where to start copying in main extent array
1692  */
1693 static void fiemap_prepare_and_copy_exts(struct ll_user_fiemap *fiemap,
1694                                          struct ll_fiemap_extent *lcl_fm_ext,
1695                                          int ost_index, unsigned int ext_count,
1696                                          int current_extent)
1697 {
1698         char *to;
1699         int ext;
1700
1701         for (ext = 0; ext < ext_count; ext++) {
1702                 lcl_fm_ext[ext].fe_device = ost_index;
1703                 lcl_fm_ext[ext].fe_flags |= FIEMAP_EXTENT_NET;
1704         }
1705
1706         /* Copy fm_extent's from fm_local to return buffer */
1707         to = (char *)fiemap + fiemap_count_to_size(current_extent);
1708         memcpy(to, lcl_fm_ext, ext_count * sizeof(struct ll_fiemap_extent));
1709 }
1710
1711 /**
1712  * Break down the FIEMAP request and send appropriate calls to individual OSTs.
1713  * This also handles the restarting of FIEMAP calls in case mapping overflows
1714  * the available number of extents in single call.
1715  */
1716 static int lov_fiemap(struct lov_obd *lov, __u32 keylen, void *key,
1717                       __u32 *vallen, void *val, struct lov_stripe_md *lsm)
1718 {
1719         struct ll_fiemap_info_key *fm_key = key;
1720         struct ll_user_fiemap *fiemap = val;
1721         struct ll_user_fiemap *fm_local = NULL;
1722         struct ll_fiemap_extent *lcl_fm_ext;
1723         int count_local;
1724         unsigned int get_num_extents = 0;
1725         int ost_index = 0, actual_start_stripe, start_stripe;
1726         u64 fm_start, fm_end, fm_length, fm_end_offset;
1727         u64 curr_loc;
1728         int current_extent = 0, rc = 0, i;
1729         int ost_eof = 0; /* EOF for object */
1730         int ost_done = 0; /* done with required mapping for this OST? */
1731         int last_stripe;
1732         int cur_stripe = 0, cur_stripe_wrap = 0, stripe_count;
1733         unsigned int buffer_size = FIEMAP_BUFFER_SIZE;
1734
1735         if (!lsm_has_objects(lsm)) {
1736                 if (lsm && lsm_is_released(lsm) && (fm_key->fiemap.fm_start <
1737                     fm_key->oa.o_size)) {
1738                         /*
1739                          * released file, return a minimal FIEMAP if
1740                          * request fits in file-size.
1741                          */
1742                         fiemap->fm_mapped_extents = 1;
1743                         fiemap->fm_extents[0].fe_logical =
1744                                         fm_key->fiemap.fm_start;
1745                         if (fm_key->fiemap.fm_start + fm_key->fiemap.fm_length <
1746                             fm_key->oa.o_size) {
1747                                 fiemap->fm_extents[0].fe_length =
1748                                         fm_key->fiemap.fm_length;
1749                         } else {
1750                                 fiemap->fm_extents[0].fe_length =
1751                                         fm_key->oa.o_size - fm_key->fiemap.fm_start;
1752                                 fiemap->fm_extents[0].fe_flags |=
1753                                                 (FIEMAP_EXTENT_UNKNOWN |
1754                                                  FIEMAP_EXTENT_LAST);
1755                         }
1756                 }
1757                 rc = 0;
1758                 goto out;
1759         }
1760
1761         if (fiemap_count_to_size(fm_key->fiemap.fm_extent_count) < buffer_size)
1762                 buffer_size = fiemap_count_to_size(fm_key->fiemap.fm_extent_count);
1763
1764         fm_local = libcfs_kvzalloc(buffer_size, GFP_NOFS);
1765         if (!fm_local) {
1766                 rc = -ENOMEM;
1767                 goto out;
1768         }
1769         lcl_fm_ext = &fm_local->fm_extents[0];
1770
1771         count_local = fiemap_size_to_count(buffer_size);
1772
1773         memcpy(fiemap, &fm_key->fiemap, sizeof(*fiemap));
1774         fm_start = fiemap->fm_start;
1775         fm_length = fiemap->fm_length;
1776         /* Calculate start stripe, last stripe and length of mapping */
1777         start_stripe = lov_stripe_number(lsm, fm_start);
1778         actual_start_stripe = start_stripe;
1779         fm_end = (fm_length == ~0ULL ? fm_key->oa.o_size :
1780                                                 fm_start + fm_length - 1);
1781         /* If fm_length != ~0ULL but fm_start+fm_length-1 exceeds file size */
1782         if (fm_end > fm_key->oa.o_size)
1783                 fm_end = fm_key->oa.o_size;
1784
1785         last_stripe = fiemap_calc_last_stripe(lsm, fm_start, fm_end,
1786                                               actual_start_stripe,
1787                                               &stripe_count);
1788
1789         fm_end_offset = fiemap_calc_fm_end_offset(fiemap, lsm, fm_start,
1790                                                   fm_end, &start_stripe);
1791         if (fm_end_offset == -EINVAL) {
1792                 rc = -EINVAL;
1793                 goto out;
1794         }
1795
1796         if (fiemap_count_to_size(fiemap->fm_extent_count) > *vallen)
1797                 fiemap->fm_extent_count = fiemap_size_to_count(*vallen);
1798         if (fiemap->fm_extent_count == 0) {
1799                 get_num_extents = 1;
1800                 count_local = 0;
1801         }
1802         /* Check each stripe */
1803         for (cur_stripe = start_stripe, i = 0; i < stripe_count;
1804              i++, cur_stripe = (cur_stripe + 1) % lsm->lsm_stripe_count) {
1805                 u64 req_fm_len; /* Stores length of required mapping */
1806                 u64 len_mapped_single_call;
1807                 u64 lun_start, lun_end, obd_object_end;
1808                 unsigned int ext_count;
1809
1810                 cur_stripe_wrap = cur_stripe;
1811
1812                 /* Find out range of mapping on this stripe */
1813                 if ((lov_stripe_intersects(lsm, cur_stripe, fm_start, fm_end,
1814                                            &lun_start, &obd_object_end)) == 0)
1815                         continue;
1816
1817                 if (lov_oinfo_is_dummy(lsm->lsm_oinfo[cur_stripe])) {
1818                         rc = -EIO;
1819                         goto out;
1820                 }
1821
1822                 /* If this is a continuation FIEMAP call and we are on
1823                  * starting stripe then lun_start needs to be set to
1824                  * fm_end_offset
1825                  */
1826                 if (fm_end_offset != 0 && cur_stripe == start_stripe)
1827                         lun_start = fm_end_offset;
1828
1829                 if (fm_length != ~0ULL) {
1830                         /* Handle fm_start + fm_length overflow */
1831                         if (fm_start + fm_length < fm_start)
1832                                 fm_length = ~0ULL - fm_start;
1833                         lun_end = lov_size_to_stripe(lsm, fm_start + fm_length,
1834                                                      cur_stripe);
1835                 } else {
1836                         lun_end = ~0ULL;
1837                 }
1838
1839                 if (lun_start == lun_end)
1840                         continue;
1841
1842                 req_fm_len = obd_object_end - lun_start;
1843                 fm_local->fm_length = 0;
1844                 len_mapped_single_call = 0;
1845
1846                 /* If the output buffer is very large and the objects have many
1847                  * extents we may need to loop on a single OST repeatedly
1848                  */
1849                 ost_eof = 0;
1850                 ost_done = 0;
1851                 do {
1852                         if (get_num_extents == 0) {
1853                                 /* Don't get too many extents. */
1854                                 if (current_extent + count_local >
1855                                     fiemap->fm_extent_count)
1856                                         count_local = fiemap->fm_extent_count -
1857                                                                  current_extent;
1858                         }
1859
1860                         lun_start += len_mapped_single_call;
1861                         fm_local->fm_length = req_fm_len - len_mapped_single_call;
1862                         req_fm_len = fm_local->fm_length;
1863                         fm_local->fm_extent_count = count_local;
1864                         fm_local->fm_mapped_extents = 0;
1865                         fm_local->fm_flags = fiemap->fm_flags;
1866
1867                         fm_key->oa.o_oi = lsm->lsm_oinfo[cur_stripe]->loi_oi;
1868                         ost_index = lsm->lsm_oinfo[cur_stripe]->loi_ost_idx;
1869
1870                         if (ost_index < 0 ||
1871                             ost_index >= lov->desc.ld_tgt_count) {
1872                                 rc = -EINVAL;
1873                                 goto out;
1874                         }
1875
1876                         /* If OST is inactive, return extent with UNKNOWN flag */
1877                         if (!lov->lov_tgts[ost_index]->ltd_active) {
1878                                 fm_local->fm_flags |= FIEMAP_EXTENT_LAST;
1879                                 fm_local->fm_mapped_extents = 1;
1880
1881                                 lcl_fm_ext[0].fe_logical = lun_start;
1882                                 lcl_fm_ext[0].fe_length = obd_object_end -
1883                                                                       lun_start;
1884                                 lcl_fm_ext[0].fe_flags |= FIEMAP_EXTENT_UNKNOWN;
1885
1886                                 goto inactive_tgt;
1887                         }
1888
1889                         fm_local->fm_start = lun_start;
1890                         fm_local->fm_flags &= ~FIEMAP_FLAG_DEVICE_ORDER;
1891                         memcpy(&fm_key->fiemap, fm_local, sizeof(*fm_local));
1892                         *vallen = fiemap_count_to_size(fm_local->fm_extent_count);
1893                         rc = obd_get_info(NULL,
1894                                           lov->lov_tgts[ost_index]->ltd_exp,
1895                                           keylen, key, vallen, fm_local, lsm);
1896                         if (rc != 0)
1897                                 goto out;
1898
1899 inactive_tgt:
1900                         ext_count = fm_local->fm_mapped_extents;
1901                         if (ext_count == 0) {
1902                                 ost_done = 1;
1903                                 /* If last stripe has hole at the end,
1904                                  * then we need to return
1905                                  */
1906                                 if (cur_stripe_wrap == last_stripe) {
1907                                         fiemap->fm_mapped_extents = 0;
1908                                         goto finish;
1909                                 }
1910                                 break;
1911                         }
1912
1913                         /* If we just need num of extents then go to next device */
1914                         if (get_num_extents) {
1915                                 current_extent += ext_count;
1916                                 break;
1917                         }
1918
1919                         len_mapped_single_call = lcl_fm_ext[ext_count-1].fe_logical -
1920                                   lun_start + lcl_fm_ext[ext_count - 1].fe_length;
1921
1922                         /* Have we finished mapping on this device? */
1923                         if (req_fm_len <= len_mapped_single_call)
1924                                 ost_done = 1;
1925
1926                         /* Clear the EXTENT_LAST flag which can be present on
1927                          * last extent
1928                          */
1929                         if (lcl_fm_ext[ext_count-1].fe_flags & FIEMAP_EXTENT_LAST)
1930                                 lcl_fm_ext[ext_count - 1].fe_flags &=
1931                                                             ~FIEMAP_EXTENT_LAST;
1932
1933                         curr_loc = lov_stripe_size(lsm,
1934                                            lcl_fm_ext[ext_count - 1].fe_logical+
1935                                            lcl_fm_ext[ext_count - 1].fe_length,
1936                                            cur_stripe);
1937                         if (curr_loc >= fm_key->oa.o_size)
1938                                 ost_eof = 1;
1939
1940                         fiemap_prepare_and_copy_exts(fiemap, lcl_fm_ext,
1941                                                      ost_index, ext_count,
1942                                                      current_extent);
1943
1944                         current_extent += ext_count;
1945
1946                         /* Ran out of available extents? */
1947                         if (current_extent >= fiemap->fm_extent_count)
1948                                 goto finish;
1949                 } while (ost_done == 0 && ost_eof == 0);
1950
1951                 if (cur_stripe_wrap == last_stripe)
1952                         goto finish;
1953         }
1954
1955 finish:
1956         /* Indicate that we are returning device offsets unless file just has
1957          * single stripe
1958          */
1959         if (lsm->lsm_stripe_count > 1)
1960                 fiemap->fm_flags |= FIEMAP_FLAG_DEVICE_ORDER;
1961
1962         if (get_num_extents)
1963                 goto skip_last_device_calc;
1964
1965         /* Check if we have reached the last stripe and whether mapping for that
1966          * stripe is done.
1967          */
1968         if (cur_stripe_wrap == last_stripe) {
1969                 if (ost_done || ost_eof)
1970                         fiemap->fm_extents[current_extent - 1].fe_flags |=
1971                                                              FIEMAP_EXTENT_LAST;
1972         }
1973
1974 skip_last_device_calc:
1975         fiemap->fm_mapped_extents = current_extent;
1976
1977 out:
1978         kvfree(fm_local);
1979         return rc;
1980 }
1981
1982 static int lov_get_info(const struct lu_env *env, struct obd_export *exp,
1983                         __u32 keylen, void *key, __u32 *vallen, void *val,
1984                         struct lov_stripe_md *lsm)
1985 {
1986         struct obd_device *obddev = class_exp2obd(exp);
1987         struct lov_obd *lov = &obddev->u.lov;
1988         int i, rc;
1989
1990         if (!vallen || !val)
1991                 return -EFAULT;
1992
1993         obd_getref(obddev);
1994
1995         if (KEY_IS(KEY_LOCK_TO_STRIPE)) {
1996                 struct {
1997                         char name[16];
1998                         struct ldlm_lock *lock;
1999                 } *data = key;
2000                 struct ldlm_res_id *res_id = &data->lock->l_resource->lr_name;
2001                 struct lov_oinfo *loi;
2002                 __u32 *stripe = val;
2003
2004                 if (*vallen < sizeof(*stripe)) {
2005                         rc = -EFAULT;
2006                         goto out;
2007                 }
2008                 *vallen = sizeof(*stripe);
2009
2010                 /* XXX This is another one of those bits that will need to
2011                  * change if we ever actually support nested LOVs.  It uses
2012                  * the lock's export to find out which stripe it is.
2013                  */
2014                 /* XXX - it's assumed all the locks for deleted OSTs have
2015                  * been cancelled. Also, the export for deleted OSTs will
2016                  * be NULL and won't match the lock's export.
2017                  */
2018                 for (i = 0; i < lsm->lsm_stripe_count; i++) {
2019                         loi = lsm->lsm_oinfo[i];
2020                         if (lov_oinfo_is_dummy(loi))
2021                                 continue;
2022
2023                         if (!lov->lov_tgts[loi->loi_ost_idx])
2024                                 continue;
2025                         if (lov->lov_tgts[loi->loi_ost_idx]->ltd_exp ==
2026                             data->lock->l_conn_export &&
2027                             ostid_res_name_eq(&loi->loi_oi, res_id)) {
2028                                 *stripe = i;
2029                                 rc = 0;
2030                                 goto out;
2031                         }
2032                 }
2033                 LDLM_ERROR(data->lock, "lock on inode without such object");
2034                 dump_lsm(D_ERROR, lsm);
2035                 rc = -ENXIO;
2036                 goto out;
2037         } else if (KEY_IS(KEY_LAST_ID)) {
2038                 struct obd_id_info *info = val;
2039                 __u32 size = sizeof(u64);
2040                 struct lov_tgt_desc *tgt;
2041
2042                 LASSERT(*vallen == sizeof(struct obd_id_info));
2043                 tgt = lov->lov_tgts[info->idx];
2044
2045                 if (!tgt || !tgt->ltd_active) {
2046                         rc = -ESRCH;
2047                         goto out;
2048                 }
2049
2050                 rc = obd_get_info(env, tgt->ltd_exp, keylen, key,
2051                                   &size, info->data, NULL);
2052                 rc = 0;
2053                 goto out;
2054         } else if (KEY_IS(KEY_LOVDESC)) {
2055                 struct lov_desc *desc_ret = val;
2056                 *desc_ret = lov->desc;
2057
2058                 rc = 0;
2059                 goto out;
2060         } else if (KEY_IS(KEY_FIEMAP)) {
2061                 rc = lov_fiemap(lov, keylen, key, vallen, val, lsm);
2062                 goto out;
2063         } else if (KEY_IS(KEY_CONNECT_FLAG)) {
2064                 struct lov_tgt_desc *tgt;
2065                 __u64 ost_idx = *((__u64 *)val);
2066
2067                 LASSERT(*vallen == sizeof(__u64));
2068                 LASSERT(ost_idx < lov->desc.ld_tgt_count);
2069                 tgt = lov->lov_tgts[ost_idx];
2070
2071                 if (!tgt || !tgt->ltd_exp) {
2072                         rc = -ESRCH;
2073                         goto out;
2074                 }
2075
2076                 *((__u64 *)val) = exp_connect_flags(tgt->ltd_exp);
2077                 rc = 0;
2078                 goto out;
2079         } else if (KEY_IS(KEY_TGT_COUNT)) {
2080                 *((int *)val) = lov->desc.ld_tgt_count;
2081                 rc = 0;
2082                 goto out;
2083         }
2084
2085         rc = -EINVAL;
2086
2087 out:
2088         obd_putref(obddev);
2089         return rc;
2090 }
2091
2092 static int lov_set_info_async(const struct lu_env *env, struct obd_export *exp,
2093                               u32 keylen, void *key, u32 vallen,
2094                               void *val, struct ptlrpc_request_set *set)
2095 {
2096         struct obd_device *obddev = class_exp2obd(exp);
2097         struct lov_obd *lov = &obddev->u.lov;
2098         u32 count;
2099         int i, rc = 0, err;
2100         struct lov_tgt_desc *tgt;
2101         unsigned int incr = 0, check_uuid = 0, do_inactive = 0, no_set = 0;
2102         unsigned int next_id = 0, mds_con = 0;
2103
2104         if (!set) {
2105                 no_set = 1;
2106                 set = ptlrpc_prep_set();
2107                 if (!set)
2108                         return -ENOMEM;
2109         }
2110
2111         obd_getref(obddev);
2112         count = lov->desc.ld_tgt_count;
2113
2114         if (KEY_IS(KEY_NEXT_ID)) {
2115                 count = vallen / sizeof(struct obd_id_info);
2116                 vallen = sizeof(u64);
2117                 incr = sizeof(struct obd_id_info);
2118                 do_inactive = 1;
2119                 next_id = 1;
2120         } else if (KEY_IS(KEY_CHECKSUM)) {
2121                 do_inactive = 1;
2122         } else if (KEY_IS(KEY_EVICT_BY_NID)) {
2123                 /* use defaults:  do_inactive = incr = 0; */
2124         } else if (KEY_IS(KEY_MDS_CONN)) {
2125                 mds_con = 1;
2126         } else if (KEY_IS(KEY_CACHE_SET)) {
2127                 LASSERT(!lov->lov_cache);
2128                 lov->lov_cache = val;
2129                 do_inactive = 1;
2130                 cl_cache_incref(lov->lov_cache);
2131         }
2132
2133         for (i = 0; i < count; i++, val = (char *)val + incr) {
2134                 if (next_id)
2135                         tgt = lov->lov_tgts[((struct obd_id_info *)val)->idx];
2136                 else
2137                         tgt = lov->lov_tgts[i];
2138                 /* OST was disconnected */
2139                 if (!tgt || !tgt->ltd_exp)
2140                         continue;
2141
2142                 /* OST is inactive and we don't want inactive OSCs */
2143                 if (!tgt->ltd_active && !do_inactive)
2144                         continue;
2145
2146                 if (mds_con) {
2147                         struct mds_group_info *mgi;
2148
2149                         LASSERT(vallen == sizeof(*mgi));
2150                         mgi = (struct mds_group_info *)val;
2151
2152                         /* Only want a specific OSC */
2153                         if (mgi->uuid && !obd_uuid_equals(mgi->uuid,
2154                                                           &tgt->ltd_uuid))
2155                                 continue;
2156
2157                         err = obd_set_info_async(env, tgt->ltd_exp,
2158                                                  keylen, key, sizeof(int),
2159                                                  &mgi->group, set);
2160                 } else if (next_id) {
2161                         err = obd_set_info_async(env, tgt->ltd_exp,
2162                                          keylen, key, vallen,
2163                                          ((struct obd_id_info *)val)->data, set);
2164                 } else {
2165                         /* Only want a specific OSC */
2166                         if (check_uuid &&
2167                             !obd_uuid_equals(val, &tgt->ltd_uuid))
2168                                 continue;
2169
2170                         err = obd_set_info_async(env, tgt->ltd_exp,
2171                                                  keylen, key, vallen, val, set);
2172                 }
2173
2174                 if (!rc)
2175                         rc = err;
2176         }
2177
2178         obd_putref(obddev);
2179         if (no_set) {
2180                 err = ptlrpc_set_wait(set);
2181                 if (!rc)
2182                         rc = err;
2183                 ptlrpc_set_destroy(set);
2184         }
2185         return rc;
2186 }
2187
2188 void lov_stripe_lock(struct lov_stripe_md *md)
2189                 __acquires(&md->lsm_lock)
2190 {
2191         LASSERT(md->lsm_lock_owner != current_pid());
2192         spin_lock(&md->lsm_lock);
2193         LASSERT(md->lsm_lock_owner == 0);
2194         md->lsm_lock_owner = current_pid();
2195 }
2196
2197 void lov_stripe_unlock(struct lov_stripe_md *md)
2198                 __releases(&md->lsm_lock)
2199 {
2200         LASSERT(md->lsm_lock_owner == current_pid());
2201         md->lsm_lock_owner = 0;
2202         spin_unlock(&md->lsm_lock);
2203 }
2204
2205 static int lov_quotactl(struct obd_device *obd, struct obd_export *exp,
2206                         struct obd_quotactl *oqctl)
2207 {
2208         struct lov_obd      *lov = &obd->u.lov;
2209         struct lov_tgt_desc *tgt;
2210         __u64           curspace = 0;
2211         __u64           bhardlimit = 0;
2212         int               i, rc = 0;
2213
2214         if (oqctl->qc_cmd != LUSTRE_Q_QUOTAON &&
2215             oqctl->qc_cmd != LUSTRE_Q_QUOTAOFF &&
2216             oqctl->qc_cmd != Q_GETOQUOTA &&
2217             oqctl->qc_cmd != Q_INITQUOTA &&
2218             oqctl->qc_cmd != LUSTRE_Q_SETQUOTA &&
2219             oqctl->qc_cmd != Q_FINVALIDATE) {
2220                 CERROR("bad quota opc %x for lov obd\n", oqctl->qc_cmd);
2221                 return -EFAULT;
2222         }
2223
2224         /* for lov tgt */
2225         obd_getref(obd);
2226         for (i = 0; i < lov->desc.ld_tgt_count; i++) {
2227                 int err;
2228
2229                 tgt = lov->lov_tgts[i];
2230
2231                 if (!tgt)
2232                         continue;
2233
2234                 if (!tgt->ltd_active || tgt->ltd_reap) {
2235                         if (oqctl->qc_cmd == Q_GETOQUOTA &&
2236                             lov->lov_tgts[i]->ltd_activate) {
2237                                 rc = -EREMOTEIO;
2238                                 CERROR("ost %d is inactive\n", i);
2239                         } else {
2240                                 CDEBUG(D_HA, "ost %d is inactive\n", i);
2241                         }
2242                         continue;
2243                 }
2244
2245                 err = obd_quotactl(tgt->ltd_exp, oqctl);
2246                 if (err) {
2247                         if (tgt->ltd_active && !rc)
2248                                 rc = err;
2249                         continue;
2250                 }
2251
2252                 if (oqctl->qc_cmd == Q_GETOQUOTA) {
2253                         curspace += oqctl->qc_dqblk.dqb_curspace;
2254                         bhardlimit += oqctl->qc_dqblk.dqb_bhardlimit;
2255                 }
2256         }
2257         obd_putref(obd);
2258
2259         if (oqctl->qc_cmd == Q_GETOQUOTA) {
2260                 oqctl->qc_dqblk.dqb_curspace = curspace;
2261                 oqctl->qc_dqblk.dqb_bhardlimit = bhardlimit;
2262         }
2263         return rc;
2264 }
2265
2266 static int lov_quotacheck(struct obd_device *obd, struct obd_export *exp,
2267                           struct obd_quotactl *oqctl)
2268 {
2269         struct lov_obd *lov = &obd->u.lov;
2270         int          i, rc = 0;
2271
2272         obd_getref(obd);
2273
2274         for (i = 0; i < lov->desc.ld_tgt_count; i++) {
2275                 if (!lov->lov_tgts[i])
2276                         continue;
2277
2278                 /* Skip quota check on the administratively disabled OSTs. */
2279                 if (!lov->lov_tgts[i]->ltd_activate) {
2280                         CWARN("lov idx %d was administratively disabled, skip quotacheck on it.\n",
2281                               i);
2282                         continue;
2283                 }
2284
2285                 if (!lov->lov_tgts[i]->ltd_active) {
2286                         CERROR("lov idx %d inactive\n", i);
2287                         rc = -EIO;
2288                         goto out;
2289                 }
2290         }
2291
2292         for (i = 0; i < lov->desc.ld_tgt_count; i++) {
2293                 int err;
2294
2295                 if (!lov->lov_tgts[i] || !lov->lov_tgts[i]->ltd_activate)
2296                         continue;
2297
2298                 err = obd_quotacheck(lov->lov_tgts[i]->ltd_exp, oqctl);
2299                 if (err && !rc)
2300                         rc = err;
2301         }
2302
2303 out:
2304         obd_putref(obd);
2305
2306         return rc;
2307 }
2308
2309 static struct obd_ops lov_obd_ops = {
2310         .owner          = THIS_MODULE,
2311         .setup          = lov_setup,
2312         .precleanup     = lov_precleanup,
2313         .cleanup        = lov_cleanup,
2314         /*.process_config       = lov_process_config,*/
2315         .connect        = lov_connect,
2316         .disconnect     = lov_disconnect,
2317         .statfs         = lov_statfs,
2318         .statfs_async   = lov_statfs_async,
2319         .packmd         = lov_packmd,
2320         .unpackmd       = lov_unpackmd,
2321         .create         = lov_create,
2322         .destroy        = lov_destroy,
2323         .getattr_async  = lov_getattr_async,
2324         .setattr_async  = lov_setattr_async,
2325         .adjust_kms     = lov_adjust_kms,
2326         .find_cbdata    = lov_find_cbdata,
2327         .iocontrol      = lov_iocontrol,
2328         .get_info       = lov_get_info,
2329         .set_info_async = lov_set_info_async,
2330         .notify         = lov_notify,
2331         .pool_new       = lov_pool_new,
2332         .pool_rem       = lov_pool_remove,
2333         .pool_add       = lov_pool_add,
2334         .pool_del       = lov_pool_del,
2335         .getref         = lov_getref,
2336         .putref         = lov_putref,
2337         .quotactl       = lov_quotactl,
2338         .quotacheck     = lov_quotacheck,
2339 };
2340
2341 struct kmem_cache *lov_oinfo_slab;
2342
2343 static int __init lov_init(void)
2344 {
2345         struct lprocfs_static_vars lvars = { NULL };
2346         int rc;
2347
2348         /* print an address of _any_ initialized kernel symbol from this
2349          * module, to allow debugging with gdb that doesn't support data
2350          * symbols from modules.
2351          */
2352         CDEBUG(D_INFO, "Lustre LOV module (%p).\n", &lov_caches);
2353
2354         rc = lu_kmem_init(lov_caches);
2355         if (rc)
2356                 return rc;
2357
2358         lov_oinfo_slab = kmem_cache_create("lov_oinfo",
2359                                            sizeof(struct lov_oinfo),
2360                                            0, SLAB_HWCACHE_ALIGN, NULL);
2361         if (!lov_oinfo_slab) {
2362                 lu_kmem_fini(lov_caches);
2363                 return -ENOMEM;
2364         }
2365         lprocfs_lov_init_vars(&lvars);
2366
2367         rc = class_register_type(&lov_obd_ops, NULL,
2368                                  LUSTRE_LOV_NAME, &lov_device_type);
2369
2370         if (rc) {
2371                 kmem_cache_destroy(lov_oinfo_slab);
2372                 lu_kmem_fini(lov_caches);
2373         }
2374
2375         return rc;
2376 }
2377
2378 static void /*__exit*/ lov_exit(void)
2379 {
2380         class_unregister_type(LUSTRE_LOV_NAME);
2381         kmem_cache_destroy(lov_oinfo_slab);
2382
2383         lu_kmem_fini(lov_caches);
2384 }
2385
2386 MODULE_AUTHOR("OpenSFS, Inc. <http://www.lustre.org/>");
2387 MODULE_DESCRIPTION("Lustre Logical Object Volume");
2388 MODULE_LICENSE("GPL");
2389 MODULE_VERSION(LUSTRE_VERSION_STRING);
2390
2391 module_init(lov_init);
2392 module_exit(lov_exit);