lustre/lov/lov_obd.c

   1 /* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
   2  * vim:expandtab:shiftwidth=8:tabstop=8:
   3  *
   4  * GPL HEADER START
   5  *
   6  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   7  *
   8  * This program is free software; you can redistribute it and/or modify
   9  * it under the terms of the GNU General Public License version 2 only,
  10  * as published by the Free Software Foundation.
  11  *
  12  * This program is distributed in the hope that it will be useful, but
  13  * WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  15  * General Public License version 2 for more details (a copy is included
  16  * in the LICENSE file that accompanied this code).
  17  *
  18  * You should have received a copy of the GNU General Public License
  19  * version 2 along with this program; If not, see
  20  * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
  21  *
  22  * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
  23  * CA 95054 USA or visit www.sun.com if you need additional information or
  24  * have any questions.
  25  *
  26  * GPL HEADER END
  27  */
  28 /*
  29  * Copyright  2008 Sun Microsystems, Inc. All rights reserved
  30  * Use is subject to license terms.
  31  */
  32 /*
  33  * This file is part of Lustre, http://www.lustre.org/
  34  * Lustre is a trademark of Sun Microsystems, Inc.
  35  *
  36  * lustre/lov/lov_obd.c
  37  *
  38  * Author: Phil Schwan <phil@clusterfs.com>
  39  * Author: Peter Braam <braam@clusterfs.com>
  40  * Author: Mike Shaver <shaver@clusterfs.com>
  41  * Author: Nathan Rutman <nathan@clusterfs.com>
  42  */
  43
  44 #ifndef EXPORT_SYMTAB
  45 # define EXPORT_SYMTAB
  46 #endif
  47 #define DEBUG_SUBSYSTEM S_LOV
  48 #ifdef __KERNEL__
  49 #include <libcfs/libcfs.h>
  50 #else
  51 #include <liblustre.h>
  52 #endif
  53
  54 #include <obd_support.h>
  55 #include <lustre_lib.h>
  56 #include <lustre_net.h>
  57 #include <lustre/lustre_idl.h>
  58 #include <lustre_dlm.h>
  59 #include <lustre_mds.h>
  60 #include <lustre_debug.h>
  61 #include <obd_class.h>
  62 #include <obd_lov.h>
  63 #include <obd_ost.h>
  64 #include <lprocfs_status.h>
  65 #include <lustre_param.h>
  66 #include <cl_object.h>
  67 #include <lustre/ll_fiemap.h>
  68
  69 #include "lov_internal.h"
  70
  71 /* Keep a refcount of lov->tgt usage to prevent racing with addition/deletion.
  72    Any function that expects lov_tgts to remain stationary must take a ref. */
  73 static void lov_getref(struct obd_device *obd)
  74 {
  75         struct lov_obd *lov = &obd->u.lov;
  76
  77         /* nobody gets through here until lov_putref is done */
  78         mutex_down(&lov->lov_lock);
  79         atomic_inc(&lov->lov_refcount);
  80         mutex_up(&lov->lov_lock);
  81         return;
  82 }
  83
  84 static void __lov_del_obd(struct obd_device *obd, struct lov_tgt_desc *tgt);
  85
  86 static void lov_putref(struct obd_device *obd)
  87 {
  88         struct lov_obd *lov = &obd->u.lov;
  89
  90         mutex_down(&lov->lov_lock);
  91         /* ok to dec to 0 more than once -- ltd_exp's will be null */
  92         if (atomic_dec_and_test(&lov->lov_refcount) && lov->lov_death_row) {
  93                 CFS_LIST_HEAD(kill);
  94                 int i;
  95                 struct lov_tgt_desc *tgt, *n;
  96                 CDEBUG(D_CONFIG, "destroying %d lov targets\n",
  97                        lov->lov_death_row);
  98                 for (i = 0; i < lov->desc.ld_tgt_count; i++) {
  99                         tgt = lov->lov_tgts[i];
 100
 101                         if (!tgt || !tgt->ltd_reap)
 102                                 continue;
 103                         list_add(&tgt->ltd_kill, &kill);
 104                         /* XXX - right now there is a dependency on ld_tgt_count
 105                          * being the maximum tgt index for computing the
 106                          * mds_max_easize. So we can't shrink it. */
 107                         lov_ost_pool_remove(&lov->lov_packed, i);
 108                         lov->lov_tgts[i] = NULL;
 109                         lov->lov_death_row--;
 110                 }
 111                 mutex_up(&lov->lov_lock);
 112
 113                 list_for_each_entry_safe(tgt, n, &kill, ltd_kill) {
 114                         list_del(&tgt->ltd_kill);
 115                         /* Disconnect */
 116                         __lov_del_obd(obd, tgt);
 117                 }
 118         } else {
 119                 mutex_up(&lov->lov_lock);
 120         }
 121 }
 122
 123 static int lov_set_osc_active(struct obd_device *obd, struct obd_uuid *uuid,
 124                               int activate);
 125 static int lov_notify(struct obd_device *obd, struct obd_device *watched,
 126                       enum obd_notify_event ev, void *data);
 127
 128
 129 #define MAX_STRING_SIZE 128
 130 int lov_connect_obd(struct obd_device *obd, __u32 index, int activate,
 131                     struct obd_connect_data *data)
 132 {
 133         struct lov_obd *lov = &obd->u.lov;
 134         struct obd_uuid tgt_uuid;
 135         struct obd_device *tgt_obd;
 136         static struct obd_uuid lov_osc_uuid = { "LOV_OSC_UUID" };
 137         struct obd_import *imp;
 138
 139 #ifdef __KERNEL__
 140         cfs_proc_dir_entry_t *lov_proc_dir;
 141 #endif
 142         int rc;
 143         ENTRY;
 144
 145         if (!lov->lov_tgts[index])
 146                 RETURN(-EINVAL);
 147
 148         tgt_uuid = lov->lov_tgts[index]->ltd_uuid;
 149         tgt_obd = lov->lov_tgts[index]->ltd_obd;
 150
 151         if (!tgt_obd->obd_set_up) {
 152                 CERROR("Target %s not set up\n", obd_uuid2str(&tgt_uuid));
 153                 RETURN(-EINVAL);
 154         }
 155
 156         /* override the sp_me from lov */
 157         tgt_obd->u.cli.cl_sp_me = lov->lov_sp_me;
 158
 159         if (data && (data->ocd_connect_flags & OBD_CONNECT_INDEX))
 160                 data->ocd_index = index;
 161
 162         /*
 163          * Divine LOV knows that OBDs under it are OSCs.
 164          */
 165         imp = tgt_obd->u.cli.cl_import;
 166
 167         if (activate) {
 168                 tgt_obd->obd_no_recov = 0;
 169                 /* FIXME this is probably supposed to be
 170                    ptlrpc_set_import_active.  Horrible naming. */
 171                 ptlrpc_activate_import(imp);
 172         }
 173
 174         rc = obd_register_observer(tgt_obd, obd);
 175         if (rc) {
 176                 CERROR("Target %s register_observer error %d\n",
 177                        obd_uuid2str(&tgt_uuid), rc);
 178                 RETURN(rc);
 179         }
 180
 181
 182         if (imp->imp_invalid) {
 183                 CERROR("not connecting OSC %s; administratively "
 184                        "disabled\n", obd_uuid2str(&tgt_uuid));
 185                 RETURN(0);
 186         }
 187
 188         rc = obd_connect(NULL, &lov->lov_tgts[index]->ltd_exp, tgt_obd,
 189                          &lov_osc_uuid, data, NULL);
 190         if (rc || !lov->lov_tgts[index]->ltd_exp) {
 191                 CERROR("Target %s connect error %d\n",
 192                        obd_uuid2str(&tgt_uuid), rc);
 193                 RETURN(-ENODEV);
 194         }
 195
 196         lov->lov_tgts[index]->ltd_reap = 0;
 197
 198         CDEBUG(D_CONFIG, "Connected tgt idx %d %s (%s) %sactive\n", index,
 199                obd_uuid2str(&tgt_uuid), tgt_obd->obd_name, activate ? "":"in");
 200
 201 #ifdef __KERNEL__
 202         lov_proc_dir = lprocfs_srch(obd->obd_proc_entry, "target_obds");
 203         if (lov_proc_dir) {
 204                 struct obd_device *osc_obd = lov->lov_tgts[index]->ltd_exp->exp_obd;
 205                 cfs_proc_dir_entry_t *osc_symlink;
 206                 char name[MAX_STRING_SIZE];
 207
 208                 LASSERT(osc_obd != NULL);
 209                 LASSERT(osc_obd->obd_magic == OBD_DEVICE_MAGIC);
 210                 LASSERT(osc_obd->obd_type->typ_name != NULL);
 211                 snprintf(name, MAX_STRING_SIZE, "../../../%s/%s",
 212                          osc_obd->obd_type->typ_name,
 213                          osc_obd->obd_name);
 214                 osc_symlink = lprocfs_add_symlink(osc_obd->obd_name, lov_proc_dir,
 215                                                   name);
 216                 if (osc_symlink == NULL) {
 217                         CERROR("could not register LOV target "
 218                                "/proc/fs/lustre/%s/%s/target_obds/%s.",
 219                                obd->obd_type->typ_name, obd->obd_name,
 220                                osc_obd->obd_name);
 221                         lprocfs_remove(&lov_proc_dir);
 222                 }
 223         }
 224 #endif
 225
 226         rc = qos_add_tgt(obd, index);
 227         if (rc)
 228                 CERROR("qos_add_tgt failed %d\n", rc);
 229
 230         RETURN(0);
 231 }
 232
 233 static int lov_connect(const struct lu_env *env,
 234                        struct obd_export **exp, struct obd_device *obd,
 235                        struct obd_uuid *cluuid, struct obd_connect_data *data,
 236                        void *localdata)
 237 {
 238         struct lov_obd *lov = &obd->u.lov;
 239         struct lov_tgt_desc *tgt;
 240         struct lustre_handle conn;
 241         int i, rc;
 242         ENTRY;
 243
 244         CDEBUG(D_CONFIG, "connect #%d\n", lov->lov_connects);
 245
 246         rc = class_connect(&conn, obd, cluuid);
 247         if (rc)
 248                 RETURN(rc);
 249
 250         *exp = class_conn2export(&conn);
 251
 252         /* Why should there ever be more than 1 connect? */
 253         lov->lov_connects++;
 254         LASSERT(lov->lov_connects == 1);
 255
 256         memset(&lov->lov_ocd, 0, sizeof(lov->lov_ocd));
 257         if (data)
 258                 lov->lov_ocd = *data;
 259
 260         obd_getref(obd);
 261         for (i = 0; i < lov->desc.ld_tgt_count; i++) {
 262                 tgt = lov->lov_tgts[i];
 263                 if (!tgt || obd_uuid_empty(&tgt->ltd_uuid))
 264                         continue;
 265                 /* Flags will be lowest common denominator */
 266                 rc = lov_connect_obd(obd, i, tgt->ltd_activate, &lov->lov_ocd);
 267                 if (rc) {
 268                         CERROR("%s: lov connect tgt %d failed: %d\n",
 269                                obd->obd_name, i, rc);
 270                         continue;
 271                 }
 272                 /* connect to administrative disabled ost */
 273                 if (!lov->lov_tgts[i]->ltd_exp)
 274                         continue;
 275
 276                 rc = lov_notify(obd, lov->lov_tgts[i]->ltd_exp->exp_obd,
 277                                 OBD_NOTIFY_CONNECT, (void *)&i);
 278                 if (rc) {
 279                         CERROR("%s error sending notify %d\n",
 280                                obd->obd_name, rc);
 281                 }
 282         }
 283         obd_putref(obd);
 284
 285         RETURN(0);
 286 }
 287
 288 static int lov_disconnect_obd(struct obd_device *obd, struct lov_tgt_desc *tgt)
 289 {
 290         cfs_proc_dir_entry_t *lov_proc_dir;
 291         struct lov_obd *lov = &obd->u.lov;
 292         struct obd_device *osc_obd;
 293         int rc;
 294         ENTRY;
 295
 296         osc_obd = class_exp2obd(tgt->ltd_exp);
 297         CDEBUG(D_CONFIG, "%s: disconnecting target %s\n",
 298                obd->obd_name, osc_obd->obd_name);
 299
 300         if (tgt->ltd_active) {
 301                 tgt->ltd_active = 0;
 302                 lov->desc.ld_active_tgt_count--;
 303                 tgt->ltd_exp->exp_obd->obd_inactive = 1;
 304         }
 305
 306         lov_proc_dir = lprocfs_srch(obd->obd_proc_entry, "target_obds");
 307         if (lov_proc_dir) {
 308                 cfs_proc_dir_entry_t *osc_symlink;
 309
 310                 osc_symlink = lprocfs_srch(lov_proc_dir, osc_obd->obd_name);
 311                 if (osc_symlink) {
 312                         lprocfs_remove(&osc_symlink);
 313                 } else {
 314                         CERROR("/proc/fs/lustre/%s/%s/target_obds/%s missing.",
 315                                obd->obd_type->typ_name, obd->obd_name,
 316                                osc_obd->obd_name);
 317                 }
 318         }
 319
 320         if (osc_obd) {
 321                 /* Pass it on to our clients.
 322                  * XXX This should be an argument to disconnect,
 323                  * XXX not a back-door flag on the OBD.  Ah well.
 324                  */
 325                 osc_obd->obd_force = obd->obd_force;
 326                 osc_obd->obd_fail = obd->obd_fail;
 327                 osc_obd->obd_no_recov = obd->obd_no_recov;
 328         }
 329
 330         obd_register_observer(osc_obd, NULL);
 331
 332         rc = obd_disconnect(tgt->ltd_exp);
 333         if (rc) {
 334                 CERROR("Target %s disconnect error %d\n",
 335                        tgt->ltd_uuid.uuid, rc);
 336                 rc = 0;
 337         }
 338
 339         qos_del_tgt(obd, tgt);
 340
 341         tgt->ltd_exp = NULL;
 342         RETURN(0);
 343 }
 344
 345 static int lov_disconnect(struct obd_export *exp)
 346 {
 347         struct obd_device *obd = class_exp2obd(exp);
 348         struct lov_obd *lov = &obd->u.lov;
 349         int i, rc;
 350         ENTRY;
 351
 352         if (!lov->lov_tgts)
 353                 goto out;
 354
 355         /* Only disconnect the underlying layers on the final disconnect. */
 356         lov->lov_connects--;
 357         if (lov->lov_connects != 0) {
 358                 /* why should there be more than 1 connect? */
 359                 CERROR("disconnect #%d\n", lov->lov_connects);
 360                 goto out;
 361         }
 362
 363         /* Let's hold another reference so lov_del_obd doesn't spin through
 364            putref every time */
 365         obd_getref(obd);
 366
 367         for (i = 0; i < lov->desc.ld_tgt_count; i++) {
 368                 if (lov->lov_tgts[i] && lov->lov_tgts[i]->ltd_exp) {
 369                         /* Disconnection is the last we know about an obd */
 370                         lov_del_target(obd, i, 0, lov->lov_tgts[i]->ltd_gen);
 371                 }
 372         }
 373         obd_putref(obd);
 374
 375 out:
 376         rc = class_disconnect(exp); /* bz 9811 */
 377         RETURN(rc);
 378 }
 379
 380 /* Error codes:
 381  *
 382  *  -EINVAL  : UUID can't be found in the LOV's target list
 383  *  -ENOTCONN: The UUID is found, but the target connection is bad (!)
 384  *  -EBADF   : The UUID is found, but the OBD is the wrong type (!)
 385  *  any >= 0 : is log target index
 386  */
 387 static int lov_set_osc_active(struct obd_device *obd, struct obd_uuid *uuid,
 388                               int activate)
 389 {
 390         struct lov_obd *lov = &obd->u.lov;
 391         struct lov_tgt_desc *tgt;
 392         int index;
 393         ENTRY;
 394
 395         CDEBUG(D_INFO, "Searching in lov %p for uuid %s (activate=%d)\n",
 396                lov, uuid->uuid, activate);
 397
 398         obd_getref(obd);
 399         for (index = 0; index < lov->desc.ld_tgt_count; index++) {
 400                 tgt = lov->lov_tgts[index];
 401                 if (!tgt || !tgt->ltd_exp)
 402                         continue;
 403
 404                 CDEBUG(D_INFO, "lov idx %d is %s conn "LPX64"\n",
 405                        index, obd_uuid2str(&tgt->ltd_uuid),
 406                        tgt->ltd_exp->exp_handle.h_cookie);
 407                 if (obd_uuid_equals(uuid, &tgt->ltd_uuid))
 408                         break;
 409         }
 410
 411         if (index == lov->desc.ld_tgt_count)
 412                 GOTO(out, index = -EINVAL);
 413
 414         if (lov->lov_tgts[index]->ltd_active == activate) {
 415                 CDEBUG(D_INFO, "OSC %s already %sactive!\n", uuid->uuid,
 416                        activate ? "" : "in");
 417                 GOTO(out, index);
 418         }
 419
 420         CDEBUG(D_CONFIG, "Marking OSC %s %sactive\n", obd_uuid2str(uuid),
 421                activate ? "" : "in");
 422
 423         lov->lov_tgts[index]->ltd_active = activate;
 424
 425         if (activate) {
 426                 lov->desc.ld_active_tgt_count++;
 427                 lov->lov_tgts[index]->ltd_exp->exp_obd->obd_inactive = 0;
 428         } else {
 429                 lov->desc.ld_active_tgt_count--;
 430                 lov->lov_tgts[index]->ltd_exp->exp_obd->obd_inactive = 1;
 431         }
 432         /* remove any old qos penalty */
 433         lov->lov_tgts[index]->ltd_qos.ltq_penalty = 0;
 434
 435  out:
 436         obd_putref(obd);
 437         RETURN(index);
 438 }
 439
 440 static int lov_notify(struct obd_device *obd, struct obd_device *watched,
 441                       enum obd_notify_event ev, void *data)
 442 {
 443         int rc = 0;
 444         ENTRY;
 445
 446         if (ev == OBD_NOTIFY_ACTIVE || ev == OBD_NOTIFY_INACTIVE) {
 447                 struct obd_uuid *uuid;
 448
 449                 LASSERT(watched);
 450
 451                 if (strcmp(watched->obd_type->typ_name, LUSTRE_OSC_NAME)) {
 452                         CERROR("unexpected notification of %s %s!\n",
 453                                watched->obd_type->typ_name,
 454                                watched->obd_name);
 455                         RETURN(-EINVAL);
 456                 }
 457                 uuid = &watched->u.cli.cl_target_uuid;
 458
 459                 /* Set OSC as active before notifying the observer, so the
 460                  * observer can use the OSC normally.
 461                  */
 462                 rc = lov_set_osc_active(obd, uuid, ev == OBD_NOTIFY_ACTIVE);
 463                 if (rc < 0) {
 464                         CERROR("%sactivation of %s failed: %d\n",
 465                                (ev == OBD_NOTIFY_ACTIVE) ? "" : "de",
 466                                obd_uuid2str(uuid), rc);
 467                         RETURN(rc);
 468                 }
 469                 /* active event should be pass lov target index as data */
 470                 data = &rc;
 471         }
 472
 473         /* Pass the notification up the chain. */
 474         if (watched) {
 475                 rc = obd_notify_observer(obd, watched, ev, data);
 476         } else {
 477                 /* NULL watched means all osc's in the lov (only for syncs) */
 478                 /* sync event should be send lov idx as data */
 479                 struct lov_obd *lov = &obd->u.lov;
 480                 struct obd_device *tgt_obd;
 481                 int i;
 482                 obd_getref(obd);
 483                 for (i = 0; i < lov->desc.ld_tgt_count; i++) {
 484                         /* don't send sync event if target not
 485                          * connected/activated */
 486                         if (!lov->lov_tgts[i] ||
 487                             !lov->lov_tgts[i]->ltd_active)
 488                                  continue;
 489
 490                         if ((ev == OBD_NOTIFY_SYNC) ||
 491                             (ev == OBD_NOTIFY_SYNC_NONBLOCK))
 492                                 data = &i;
 493
 494                         tgt_obd = class_exp2obd(lov->lov_tgts[i]->ltd_exp);
 495
 496                         rc = obd_notify_observer(obd, tgt_obd, ev, data);
 497                         if (rc) {
 498                                 CERROR("%s: notify %s of %s failed %d\n",
 499                                        obd->obd_name,
 500                                        obd->obd_observer->obd_name,
 501                                        tgt_obd->obd_name, rc);
 502                                 break;
 503                         }
 504                 }
 505                 obd_putref(obd);
 506         }
 507
 508         RETURN(rc);
 509 }
 510
 511 int lov_add_target(struct obd_device *obd, struct obd_uuid *uuidp,
 512                    __u32 index, int gen, int active)
 513 {
 514         struct lov_obd *lov = &obd->u.lov;
 515         struct lov_tgt_desc *tgt;
 516         struct obd_device *tgt_obd;
 517         int rc;
 518         ENTRY;
 519
 520         CDEBUG(D_CONFIG, "uuid:%s idx:%d gen:%d active:%d\n",
 521                uuidp->uuid, index, gen, active);
 522
 523         if (gen <= 0) {
 524                 CERROR("request to add OBD %s with invalid generation: %d\n",
 525                        uuidp->uuid, gen);
 526                 RETURN(-EINVAL);
 527         }
 528
 529         tgt_obd = class_find_client_obd(uuidp, LUSTRE_OSC_NAME,
 530                                         &obd->obd_uuid);
 531         if (tgt_obd == NULL)
 532                 RETURN(-EINVAL);
 533
 534         mutex_down(&lov->lov_lock);
 535
 536         if ((index < lov->lov_tgt_size) && (lov->lov_tgts[index] != NULL)) {
 537                 tgt = lov->lov_tgts[index];
 538                 CERROR("UUID %s already assigned at LOV target index %d\n",
 539                        obd_uuid2str(&tgt->ltd_uuid), index);
 540                 mutex_up(&lov->lov_lock);
 541                 RETURN(-EEXIST);
 542         }
 543
 544         if (index >= lov->lov_tgt_size) {
 545                 /* We need to reallocate the lov target array. */
 546                 struct lov_tgt_desc **newtgts, **old = NULL;
 547                 __u32 newsize, oldsize = 0;
 548
 549                 newsize = max(lov->lov_tgt_size, (__u32)2);
 550                 while (newsize < index + 1)
 551                         newsize = newsize << 1;
 552                 OBD_ALLOC(newtgts, sizeof(*newtgts) * newsize);
 553                 if (newtgts == NULL) {
 554                         mutex_up(&lov->lov_lock);
 555                         RETURN(-ENOMEM);
 556                 }
 557
 558                 if (lov->lov_tgt_size) {
 559                         memcpy(newtgts, lov->lov_tgts, sizeof(*newtgts) *
 560                                lov->lov_tgt_size);
 561                         old = lov->lov_tgts;
 562                         oldsize = lov->lov_tgt_size;
 563                 }
 564
 565                 lov->lov_tgts = newtgts;
 566                 lov->lov_tgt_size = newsize;
 567 #ifdef __KERNEL__
 568                 smp_rmb();
 569 #endif
 570                 if (old)
 571                         OBD_FREE(old, sizeof(*old) * oldsize);
 572
 573                 CDEBUG(D_CONFIG, "tgts: %p size: %d\n",
 574                        lov->lov_tgts, lov->lov_tgt_size);
 575         }
 576
 577         OBD_ALLOC_PTR(tgt);
 578         if (!tgt) {
 579                 mutex_up(&lov->lov_lock);
 580                 RETURN(-ENOMEM);
 581         }
 582
 583         rc = lov_ost_pool_add(&lov->lov_packed, index, lov->lov_tgt_size);
 584         if (rc) {
 585                 mutex_up(&lov->lov_lock);
 586                 OBD_FREE_PTR(tgt);
 587                 RETURN(rc);
 588         }
 589
 590         memset(tgt, 0, sizeof(*tgt));
 591         tgt->ltd_uuid = *uuidp;
 592         tgt->ltd_obd = tgt_obd;
 593         /* XXX - add a sanity check on the generation number. */
 594         tgt->ltd_gen = gen;
 595         tgt->ltd_index = index;
 596         tgt->ltd_activate = active;
 597         lov->lov_tgts[index] = tgt;
 598         if (index >= lov->desc.ld_tgt_count)
 599                 lov->desc.ld_tgt_count = index + 1;
 600
 601         mutex_up(&lov->lov_lock);
 602
 603         CDEBUG(D_CONFIG, "idx=%d ltd_gen=%d ld_tgt_count=%d\n",
 604                 index, tgt->ltd_gen, lov->desc.ld_tgt_count);
 605
 606         if (lov->lov_connects == 0) {
 607                 /* lov_connect hasn't been called yet. We'll do the
 608                    lov_connect_obd on this target when that fn first runs,
 609                    because we don't know the connect flags yet. */
 610                 RETURN(0);
 611         }
 612
 613         obd_getref(obd);
 614
 615         rc = lov_connect_obd(obd, index, active, &lov->lov_ocd);
 616         if (rc)
 617                 GOTO(out, rc);
 618
 619         /* connect to administrative disabled ost */
 620         if (!tgt->ltd_exp)
 621                 GOTO(out, rc = 0);
 622
 623         rc = lov_notify(obd, tgt->ltd_exp->exp_obd,
 624                         active ? OBD_NOTIFY_CONNECT : OBD_NOTIFY_INACTIVE,
 625                         (void *)&index);
 626
 627 out:
 628         if (rc) {
 629                 CERROR("add failed (%d), deleting %s\n", rc,
 630                        obd_uuid2str(&tgt->ltd_uuid));
 631                 lov_del_target(obd, index, 0, 0);
 632         }
 633         obd_putref(obd);
 634         RETURN(rc);
 635 }
 636
 637 /* Schedule a target for deletion */
 638 int lov_del_target(struct obd_device *obd, __u32 index,
 639                    struct obd_uuid *uuidp, int gen)
 640 {
 641         struct lov_obd *lov = &obd->u.lov;
 642         int count = lov->desc.ld_tgt_count;
 643         int rc = 0;
 644         ENTRY;
 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         obd_getref(obd);
 653
 654         if (!lov->lov_tgts[index]) {
 655                 CERROR("LOV target at index %d is not setup.\n", index);
 656                 GOTO(out, rc = -EINVAL);
 657         }
 658
 659         if (uuidp && !obd_uuid_equals(uuidp, &lov->lov_tgts[index]->ltd_uuid)) {
 660                 CERROR("LOV target UUID %s at index %d doesn't match %s.\n",
 661                        lov_uuid2str(lov, index), index,
 662                        obd_uuid2str(uuidp));
 663                 GOTO(out, rc = -EINVAL);
 664         }
 665
 666         CDEBUG(D_CONFIG, "uuid: %s idx: %d gen: %d exp: %p active: %d\n",
 667                lov_uuid2str(lov, index), index,
 668                lov->lov_tgts[index]->ltd_gen, lov->lov_tgts[index]->ltd_exp,
 669                lov->lov_tgts[index]->ltd_active);
 670
 671         lov->lov_tgts[index]->ltd_reap = 1;
 672         lov->lov_death_row++;
 673         /* we really delete it from obd_putref */
 674 out:
 675         obd_putref(obd);
 676
 677         RETURN(rc);
 678 }
 679
 680 static void __lov_del_obd(struct obd_device *obd, struct lov_tgt_desc *tgt)
 681 {
 682         struct obd_device *osc_obd;
 683
 684         LASSERT(tgt);
 685         LASSERT(tgt->ltd_reap);
 686
 687         osc_obd = class_exp2obd(tgt->ltd_exp);
 688
 689         CDEBUG(D_CONFIG, "Removing tgt %s : %s\n",
 690                tgt->ltd_uuid.uuid,
 691                osc_obd ? osc_obd->obd_name : "<no obd>");
 692
 693         if (tgt->ltd_exp)
 694                 lov_disconnect_obd(obd, tgt);
 695
 696         OBD_FREE_PTR(tgt);
 697
 698         /* Manual cleanup - no cleanup logs to clean up the osc's.  We must
 699            do it ourselves. And we can't do it from lov_cleanup,
 700            because we just lost our only reference to it. */
 701         if (osc_obd)
 702                 class_manual_cleanup(osc_obd);
 703 }
 704
 705 void lov_fix_desc_stripe_size(__u64 *val)
 706 {
 707         if (*val < PTLRPC_MAX_BRW_SIZE) {
 708                 LCONSOLE_WARN("Increasing default stripe size to min %u\n",
 709                               PTLRPC_MAX_BRW_SIZE);
 710                 *val = PTLRPC_MAX_BRW_SIZE;
 711         } else if (*val & (LOV_MIN_STRIPE_SIZE - 1)) {
 712                 *val &= ~(LOV_MIN_STRIPE_SIZE - 1);
 713                 LCONSOLE_WARN("Changing default stripe size to "LPU64" (a "
 714                               "multiple of %u)\n",
 715                               *val, LOV_MIN_STRIPE_SIZE);
 716         }
 717 }
 718
 719 void lov_fix_desc_stripe_count(__u32 *val)
 720 {
 721         if (*val == 0)
 722                 *val = 1;
 723 }
 724
 725 void lov_fix_desc_pattern(__u32 *val)
 726 {
 727         /* from lov_setstripe */
 728         if ((*val != 0) && (*val != LOV_PATTERN_RAID0)) {
 729                 LCONSOLE_WARN("Unknown stripe pattern: %#x\n", *val);
 730                 *val = 0;
 731         }
 732 }
 733
 734 void lov_fix_desc_qos_maxage(__u32 *val)
 735 {
 736         /* fix qos_maxage */
 737         if (*val == 0)
 738                 *val = QOS_DEFAULT_MAXAGE;
 739 }
 740
 741 void lov_fix_desc(struct lov_desc *desc)
 742 {
 743         lov_fix_desc_stripe_size(&desc->ld_default_stripe_size);
 744         lov_fix_desc_stripe_count(&desc->ld_default_stripe_count);
 745         lov_fix_desc_pattern(&desc->ld_pattern);
 746         lov_fix_desc_qos_maxage(&desc->ld_qos_maxage);
 747 }
 748
 749 int lov_setup(struct obd_device *obd, struct lustre_cfg *lcfg)
 750 {
 751         struct lprocfs_static_vars lvars = { 0 };
 752         struct lov_desc *desc;
 753         struct lov_obd *lov = &obd->u.lov;
 754         int rc;
 755         ENTRY;
 756
 757         if (LUSTRE_CFG_BUFLEN(lcfg, 1) < 1) {
 758                 CERROR("LOV setup requires a descriptor\n");
 759                 RETURN(-EINVAL);
 760         }
 761
 762         desc = (struct lov_desc *)lustre_cfg_buf(lcfg, 1);
 763
 764         if (sizeof(*desc) > LUSTRE_CFG_BUFLEN(lcfg, 1)) {
 765                 CERROR("descriptor size wrong: %d > %d\n",
 766                        (int)sizeof(*desc), LUSTRE_CFG_BUFLEN(lcfg, 1));
 767                 RETURN(-EINVAL);
 768         }
 769
 770         if (desc->ld_magic != LOV_DESC_MAGIC) {
 771                 if (desc->ld_magic == __swab32(LOV_DESC_MAGIC)) {
 772                             CDEBUG(D_OTHER, "%s: Swabbing lov desc %p\n",
 773                                    obd->obd_name, desc);
 774                             lustre_swab_lov_desc(desc);
 775                 } else {
 776                         CERROR("%s: Bad lov desc magic: %#x\n",
 777                                obd->obd_name, desc->ld_magic);
 778                         RETURN(-EINVAL);
 779                 }
 780         }
 781
 782         lov_fix_desc(desc);
 783
 784         desc->ld_active_tgt_count = 0;
 785         lov->desc = *desc;
 786         lov->lov_tgt_size = 0;
 787
 788         sema_init(&lov->lov_lock, 1);
 789         atomic_set(&lov->lov_refcount, 0);
 790         CFS_INIT_LIST_HEAD(&lov->lov_qos.lq_oss_list);
 791         init_rwsem(&lov->lov_qos.lq_rw_sem);
 792         lov->lov_sp_me = LUSTRE_SP_CLI;
 793         lov->lov_qos.lq_dirty = 1;
 794         lov->lov_qos.lq_rr.lqr_dirty = 1;
 795         lov->lov_qos.lq_reset = 1;
 796         /* Default priority is toward free space balance */
 797         lov->lov_qos.lq_prio_free = 232;
 798         /* Default threshold for rr (roughly 17%) */
 799         lov->lov_qos.lq_threshold_rr = 43;
 800         /* Init statfs fields */
 801         OBD_ALLOC_PTR(lov->lov_qos.lq_statfs_data);
 802         if (NULL == lov->lov_qos.lq_statfs_data)
 803                 RETURN(-ENOMEM);
 804         cfs_waitq_init(&lov->lov_qos.lq_statfs_waitq);
 805
 806         lov->lov_pools_hash_body = cfs_hash_create("POOLS", HASH_POOLS_CUR_BITS,
 807                                                    HASH_POOLS_CUR_BITS,
 808                                                    &pool_hash_operations, 0);
 809         CFS_INIT_LIST_HEAD(&lov->lov_pool_list);
 810         lov->lov_pool_count = 0;
 811         rc = lov_ost_pool_init(&lov->lov_packed, 0);
 812         if (rc)
 813                 RETURN(rc);
 814         rc = lov_ost_pool_init(&lov->lov_qos.lq_rr.lqr_pool, 0);
 815         if (rc) {
 816                 lov_ost_pool_free(&lov->lov_packed);
 817                 RETURN(rc);
 818         }
 819
 820         lprocfs_lov_init_vars(&lvars);
 821         lprocfs_obd_setup(obd, lvars.obd_vars);
 822 #ifdef LPROCFS
 823         {
 824                 int rc;
 825
 826                 rc = lprocfs_seq_create(obd->obd_proc_entry, "target_obd",
 827                                         0444, &lov_proc_target_fops, obd);
 828                 if (rc)
 829                         CWARN("Error adding the target_obd file\n");
 830         }
 831 #endif
 832         lov->lov_pool_proc_entry = lprocfs_register("pools",
 833                                                     obd->obd_proc_entry,
 834                                                     NULL, NULL);
 835
 836         RETURN(0);
 837 }
 838
 839 static int lov_precleanup(struct obd_device *obd, enum obd_cleanup_stage stage)
 840 {
 841         int rc = 0;
 842         struct lov_obd *lov = &obd->u.lov;
 843
 844         ENTRY;
 845
 846         switch (stage) {
 847         case OBD_CLEANUP_EARLY: {
 848                 int i;
 849                 for (i = 0; i < lov->desc.ld_tgt_count; i++) {
 850                         if (!lov->lov_tgts[i] || !lov->lov_tgts[i]->ltd_active)
 851                                 continue;
 852                         obd_precleanup(class_exp2obd(lov->lov_tgts[i]->ltd_exp),
 853                                        OBD_CLEANUP_EARLY);
 854                 }
 855                 break;
 856         }
 857         case OBD_CLEANUP_EXPORTS:
 858                 rc = obd_llog_finish(obd, 0);
 859                 if (rc != 0)
 860                         CERROR("failed to cleanup llogging subsystems\n");
 861                 break;
 862         }
 863         RETURN(rc);
 864 }
 865
 866 static int lov_cleanup(struct obd_device *obd)
 867 {
 868         struct lov_obd *lov = &obd->u.lov;
 869         struct list_head *pos, *tmp;
 870         struct pool_desc *pool;
 871
 872         list_for_each_safe(pos, tmp, &lov->lov_pool_list) {
 873                 pool = list_entry(pos, struct pool_desc, pool_list);
 874                 /* free pool structs */
 875                 CDEBUG(D_INFO, "delete pool %p\n", pool);
 876                 lov_pool_del(obd, pool->pool_name);
 877         }
 878         cfs_hash_destroy(lov->lov_pools_hash_body);
 879         lov_ost_pool_free(&(lov->lov_qos.lq_rr.lqr_pool));
 880         lov_ost_pool_free(&lov->lov_packed);
 881
 882         if (lov->lov_tgts) {
 883                 int i;
 884                 obd_getref(obd);
 885                 for (i = 0; i < lov->desc.ld_tgt_count; i++) {
 886                         if (!lov->lov_tgts[i])
 887                                 continue;
 888
 889                         /* Inactive targets may never have connected */
 890                         if (lov->lov_tgts[i]->ltd_active ||
 891                             atomic_read(&lov->lov_refcount))
 892                             /* We should never get here - these
 893                                should have been removed in the
 894                              disconnect. */
 895                                 CERROR("lov tgt %d not cleaned!"
 896                                        " deathrow=%d, lovrc=%d\n",
 897                                        i, lov->lov_death_row,
 898                                        atomic_read(&lov->lov_refcount));
 899                         lov_del_target(obd, i, 0, 0);
 900                 }
 901                 obd_putref(obd);
 902                 OBD_FREE(lov->lov_tgts, sizeof(*lov->lov_tgts) *
 903                          lov->lov_tgt_size);
 904                 lov->lov_tgt_size = 0;
 905         }
 906
 907         /* clear pools parent proc entry only after all pools is killed */
 908         lprocfs_obd_cleanup(obd);
 909
 910         OBD_FREE_PTR(lov->lov_qos.lq_statfs_data);
 911         RETURN(0);
 912 }
 913
 914 int lov_process_config_base(struct obd_device *obd, struct lustre_cfg *lcfg,
 915                             __u32 *indexp, int *genp)
 916 {
 917         struct obd_uuid obd_uuid;
 918         int cmd;
 919         int rc = 0;
 920         ENTRY;
 921
 922         switch(cmd = lcfg->lcfg_command) {
 923         case LCFG_LOV_ADD_OBD:
 924         case LCFG_LOV_ADD_INA:
 925         case LCFG_LOV_DEL_OBD: {
 926                 __u32 index;
 927                 int gen;
 928                 /* lov_modify_tgts add  0:lov_mdsA  1:ost1_UUID  2:0  3:1 */
 929                 if (LUSTRE_CFG_BUFLEN(lcfg, 1) > sizeof(obd_uuid.uuid))
 930                         GOTO(out, rc = -EINVAL);
 931
 932                 obd_str2uuid(&obd_uuid,  lustre_cfg_buf(lcfg, 1));
 933
 934                 if (sscanf(lustre_cfg_buf(lcfg, 2), "%d", indexp) != 1)
 935                         GOTO(out, rc = -EINVAL);
 936                 if (sscanf(lustre_cfg_buf(lcfg, 3), "%d", genp) != 1)
 937                         GOTO(out, rc = -EINVAL);
 938                 index = *indexp;
 939                 gen = *genp;
 940                 if (cmd == LCFG_LOV_ADD_OBD)
 941                         rc = lov_add_target(obd, &obd_uuid, index, gen, 1);
 942                 else if (cmd == LCFG_LOV_ADD_INA)
 943                         rc = lov_add_target(obd, &obd_uuid, index, gen, 0);
 944                 else
 945                         rc = lov_del_target(obd, index, &obd_uuid, gen);
 946                 GOTO(out, rc);
 947         }
 948         case LCFG_PARAM: {
 949                 struct lprocfs_static_vars lvars = { 0 };
 950                 struct lov_desc *desc = &(obd->u.lov.desc);
 951
 952                 if (!desc)
 953                         GOTO(out, rc = -EINVAL);
 954
 955                 lprocfs_lov_init_vars(&lvars);
 956
 957                 rc = class_process_proc_param(PARAM_LOV, lvars.obd_vars,
 958                                               lcfg, obd);
 959                 if (rc > 0)
 960                         rc = 0;
 961                 GOTO(out, rc);
 962         }
 963         case LCFG_POOL_NEW:
 964         case LCFG_POOL_ADD:
 965         case LCFG_POOL_DEL:
 966         case LCFG_POOL_REM:
 967                 GOTO(out, rc);
 968
 969         default: {
 970                 CERROR("Unknown command: %d\n", lcfg->lcfg_command);
 971                 GOTO(out, rc = -EINVAL);
 972
 973         }
 974         }
 975 out:
 976         RETURN(rc);
 977 }
 978
 979 #ifndef log2
 980 #define log2(n) ffz(~(n))
 981 #endif
 982
 983 static int lov_clear_orphans(struct obd_export *export, struct obdo *src_oa,
 984                              struct lov_stripe_md **ea,
 985                              struct obd_trans_info *oti)
 986 {
 987         struct lov_obd *lov;
 988         struct obdo *tmp_oa;
 989         struct obd_uuid *ost_uuid = NULL;
 990         int rc = 0, i;
 991         ENTRY;
 992
 993         LASSERT(src_oa->o_valid & OBD_MD_FLFLAGS &&
 994                 src_oa->o_flags == OBD_FL_DELORPHAN);
 995
 996         lov = &export->exp_obd->u.lov;
 997
 998         OBDO_ALLOC(tmp_oa);
 999         if (tmp_oa == NULL)
1000                 RETURN(-ENOMEM);
1001
1002         if (oti->oti_ost_uuid) {
1003                 ost_uuid = oti->oti_ost_uuid;
1004                 CDEBUG(D_HA, "clearing orphans only for %s\n",
1005                        ost_uuid->uuid);
1006         }
1007
1008         obd_getref(export->exp_obd);
1009         for (i = 0; i < lov->desc.ld_tgt_count; i++) {
1010                 struct lov_stripe_md obj_md;
1011                 struct lov_stripe_md *obj_mdp = &obj_md;
1012                 struct lov_tgt_desc *tgt;
1013                 int err;
1014
1015                 tgt = lov->lov_tgts[i];
1016                 if (!tgt)
1017                         continue;
1018
1019                 /* if called for a specific target, we don't
1020                    care if it is not active. */
1021                 if (!lov->lov_tgts[i]->ltd_active && ost_uuid == NULL) {
1022                         CDEBUG(D_HA, "lov idx %d inactive\n", i);
1023                         continue;
1024                 }
1025
1026                 if (ost_uuid && !obd_uuid_equals(ost_uuid, &tgt->ltd_uuid))
1027                         continue;
1028
1029                 CDEBUG(D_CONFIG,"Clear orphans for %d:%s\n", i,
1030                        obd_uuid2str(ost_uuid));
1031
1032                 memcpy(tmp_oa, src_oa, sizeof(*tmp_oa));
1033
1034                 LASSERT(lov->lov_tgts[i]->ltd_exp);
1035                 /* XXX: LOV STACKING: use real "obj_mdp" sub-data */
1036                 err = obd_create(lov->lov_tgts[i]->ltd_exp,
1037                                  tmp_oa, &obj_mdp, oti);
1038                 if (err) {
1039                         /* This export will be disabled until it is recovered,
1040                            and then orphan recovery will be completed. */
1041                         CERROR("error in orphan recovery on OST idx %d/%d: "
1042                                "rc = %d\n", i, lov->desc.ld_tgt_count, err);
1043                         rc = err;
1044                 }
1045
1046                 if (ost_uuid)
1047                         break;
1048         }
1049         obd_putref(export->exp_obd);
1050
1051         OBDO_FREE(tmp_oa);
1052         RETURN(rc);
1053 }
1054
1055 static int lov_recreate(struct obd_export *exp, struct obdo *src_oa,
1056                         struct lov_stripe_md **ea, struct obd_trans_info *oti)
1057 {
1058         struct lov_stripe_md *obj_mdp, *lsm;
1059         struct lov_obd *lov = &exp->exp_obd->u.lov;
1060         unsigned ost_idx;
1061         int rc, i;
1062         ENTRY;
1063
1064         LASSERT(src_oa->o_valid & OBD_MD_FLFLAGS &&
1065                 src_oa->o_flags & OBD_FL_RECREATE_OBJS);
1066
1067         OBD_ALLOC(obj_mdp, sizeof(*obj_mdp));
1068         if (obj_mdp == NULL)
1069                 RETURN(-ENOMEM);
1070
1071         ost_idx = src_oa->o_nlink;
1072         lsm = *ea;
1073         if (lsm == NULL)
1074                 GOTO(out, rc = -EINVAL);
1075         if (ost_idx >= lov->desc.ld_tgt_count ||
1076             !lov->lov_tgts[ost_idx])
1077                 GOTO(out, rc = -EINVAL);
1078
1079         for (i = 0; i < lsm->lsm_stripe_count; i++) {
1080                 if (lsm->lsm_oinfo[i]->loi_ost_idx == ost_idx) {
1081                         if (lsm->lsm_oinfo[i]->loi_id != src_oa->o_id)
1082                                 GOTO(out, rc = -EINVAL);
1083                         break;
1084                 }
1085         }
1086         if (i == lsm->lsm_stripe_count)
1087                 GOTO(out, rc = -EINVAL);
1088
1089         rc = obd_create(lov->lov_tgts[ost_idx]->ltd_exp, src_oa, &obj_mdp, oti);
1090 out:
1091         OBD_FREE(obj_mdp, sizeof(*obj_mdp));
1092         RETURN(rc);
1093 }
1094
1095 /* the LOV expects oa->o_id to be set to the LOV object id */
1096 static int lov_create(struct obd_export *exp, struct obdo *src_oa,
1097                       struct lov_stripe_md **ea, struct obd_trans_info *oti)
1098 {
1099         struct lov_obd *lov;
1100         struct obd_info oinfo;
1101         struct lov_request_set *set = NULL;
1102         struct lov_request *req;
1103         struct l_wait_info  lwi = { 0 };
1104         int rc = 0;
1105         ENTRY;
1106
1107         LASSERT(ea != NULL);
1108         if (exp == NULL)
1109                 RETURN(-EINVAL);
1110
1111         if ((src_oa->o_valid & OBD_MD_FLFLAGS) &&
1112             src_oa->o_flags == OBD_FL_DELORPHAN) {
1113                 rc = lov_clear_orphans(exp, src_oa, ea, oti);
1114                 RETURN(rc);
1115         }
1116
1117         lov = &exp->exp_obd->u.lov;
1118         if (!lov->desc.ld_active_tgt_count)
1119                 RETURN(-EIO);
1120
1121         obd_getref(exp->exp_obd);
1122         /* Recreate a specific object id at the given OST index */
1123         if ((src_oa->o_valid & OBD_MD_FLFLAGS) &&
1124             (src_oa->o_flags & OBD_FL_RECREATE_OBJS)) {
1125                  rc = lov_recreate(exp, src_oa, ea, oti);
1126                  GOTO(out, rc);
1127         }
1128
1129         /* issue statfs rpcs if the osfs data is older than qos_maxage - 1s,
1130          * later in alloc_qos(), we will wait for those rpcs to complete if
1131          * the osfs age is older than 2 * qos_maxage */
1132         qos_statfs_update(exp->exp_obd,
1133                           cfs_time_shift_64(-lov->desc.ld_qos_maxage) + HZ, 0);
1134
1135         rc = lov_prep_create_set(exp, &oinfo, ea, src_oa, oti, &set);
1136         if (rc)
1137                 GOTO(out, rc);
1138
1139         list_for_each_entry(req, &set->set_list, rq_link) {
1140                 /* XXX: LOV STACKING: use real "obj_mdp" sub-data */
1141                 rc = obd_create_async(lov->lov_tgts[req->rq_idx]->ltd_exp,
1142                                       &req->rq_oi, &req->rq_oi.oi_md, oti);
1143         }
1144
1145         /* osc_create have timeout equ obd_timeout/2 so waiting don't be
1146          * longer then this */
1147         l_wait_event(set->set_waitq, lov_finished_set(set), &lwi);
1148
1149         /* we not have ptlrpc set for assign set->interpret and should
1150          * be call interpret function himself. calling from cb_create_update
1151          * not permited because lov_fini_create_set can sleep for long time,
1152          * but we must avoid sleeping in ptlrpcd interpret function. */
1153         rc = lov_fini_create_set(set, ea);
1154 out:
1155         obd_putref(exp->exp_obd);
1156         RETURN(rc);
1157 }
1158
1159 #define ASSERT_LSM_MAGIC(lsmp)                                                  \
1160 do {                                                                            \
1161         LASSERT((lsmp) != NULL);                                                \
1162         LASSERTF(((lsmp)->lsm_magic == LOV_MAGIC_V1 ||                          \
1163                  (lsmp)->lsm_magic == LOV_MAGIC_V3),                            \
1164                  "%p->lsm_magic=%x\n", (lsmp), (lsmp)->lsm_magic);              \
1165 } while (0)
1166
1167 static int lov_destroy(struct obd_export *exp, struct obdo *oa,
1168                        struct lov_stripe_md *lsm, struct obd_trans_info *oti,
1169                        struct obd_export *md_exp, void *capa)
1170 {
1171         struct lov_request_set *set;
1172         struct obd_info oinfo;
1173         struct lov_request *req;
1174         struct list_head *pos;
1175         struct lov_obd *lov;
1176         int rc = 0, err = 0;
1177         ENTRY;
1178
1179         ASSERT_LSM_MAGIC(lsm);
1180
1181         if (!exp || !exp->exp_obd)
1182                 RETURN(-ENODEV);
1183
1184         if (oa->o_valid & OBD_MD_FLCOOKIE) {
1185                 LASSERT(oti);
1186                 LASSERT(oti->oti_logcookies);
1187         }
1188
1189         lov = &exp->exp_obd->u.lov;
1190         obd_getref(exp->exp_obd);
1191         rc = lov_prep_destroy_set(exp, &oinfo, oa, lsm, oti, &set);
1192         if (rc)
1193                 GOTO(out, rc);
1194
1195         list_for_each (pos, &set->set_list) {
1196                 req = list_entry(pos, struct lov_request, rq_link);
1197
1198                 if (oa->o_valid & OBD_MD_FLCOOKIE)
1199                         oti->oti_logcookies = set->set_cookies + req->rq_stripe;
1200
1201                 err = obd_destroy(lov->lov_tgts[req->rq_idx]->ltd_exp,
1202                                   req->rq_oi.oi_oa, NULL, oti, NULL, capa);
1203                 err = lov_update_common_set(set, req, err);
1204                 if (err) {
1205                         CERROR("error: destroying objid "LPX64" subobj "
1206                                LPX64" on OST idx %d: rc = %d\n",
1207                                oa->o_id, req->rq_oi.oi_oa->o_id,
1208                                req->rq_idx, err);
1209                         if (!rc)
1210                                 rc = err;
1211                 }
1212         }
1213
1214         if (rc == 0) {
1215                 LASSERT(lsm_op_find(lsm->lsm_magic) != NULL);
1216                 rc = lsm_op_find(lsm->lsm_magic)->lsm_destroy(lsm, oa, md_exp);
1217         }
1218         err = lov_fini_destroy_set(set);
1219 out:
1220         obd_putref(exp->exp_obd);
1221         RETURN(rc ? rc : err);
1222 }
1223
1224 static int lov_getattr(struct obd_export *exp, struct obd_info *oinfo)
1225 {
1226         struct lov_request_set *set;
1227         struct lov_request *req;
1228         struct list_head *pos;
1229         struct lov_obd *lov;
1230         int err = 0, rc = 0;
1231         ENTRY;
1232
1233         LASSERT(oinfo);
1234         ASSERT_LSM_MAGIC(oinfo->oi_md);
1235
1236         if (!exp || !exp->exp_obd)
1237                 RETURN(-ENODEV);
1238
1239         lov = &exp->exp_obd->u.lov;
1240
1241         rc = lov_prep_getattr_set(exp, oinfo, &set);
1242         if (rc)
1243                 RETURN(rc);
1244
1245         list_for_each (pos, &set->set_list) {
1246                 req = list_entry(pos, struct lov_request, rq_link);
1247
1248                 CDEBUG(D_INFO, "objid "LPX64"[%d] has subobj "LPX64" at idx "
1249                        "%u\n", oinfo->oi_oa->o_id, req->rq_stripe,
1250                        req->rq_oi.oi_oa->o_id, req->rq_idx);
1251
1252                 rc = obd_getattr(lov->lov_tgts[req->rq_idx]->ltd_exp,
1253                                  &req->rq_oi);
1254                 err = lov_update_common_set(set, req, rc);
1255                 if (err) {
1256                         CERROR("error: getattr objid "LPX64" subobj "
1257                                LPX64" on OST idx %d: rc = %d\n",
1258                                oinfo->oi_oa->o_id, req->rq_oi.oi_oa->o_id,
1259                                req->rq_idx, err);
1260                         break;
1261                 }
1262         }
1263
1264         rc = lov_fini_getattr_set(set);
1265         if (err)
1266                 rc = err;
1267         RETURN(rc);
1268 }
1269
1270 static int lov_getattr_interpret(struct ptlrpc_request_set *rqset,
1271                                  void *data, int rc)
1272 {
1273         struct lov_request_set *lovset = (struct lov_request_set *)data;
1274         int err;
1275         ENTRY;
1276
1277         /* don't do attribute merge if this aysnc op failed */
1278         if (rc)
1279                 lovset->set_completes = 0;
1280         err = lov_fini_getattr_set(lovset);
1281         RETURN(rc ? rc : err);
1282 }
1283
1284 static int lov_getattr_async(struct obd_export *exp, struct obd_info *oinfo,
1285                               struct ptlrpc_request_set *rqset)
1286 {
1287         struct lov_request_set *lovset;
1288         struct lov_obd *lov;
1289         struct list_head *pos;
1290         struct lov_request *req;
1291         int rc = 0, err;
1292         ENTRY;
1293
1294         LASSERT(oinfo);
1295         ASSERT_LSM_MAGIC(oinfo->oi_md);
1296
1297         if (!exp || !exp->exp_obd)
1298                 RETURN(-ENODEV);
1299
1300         lov = &exp->exp_obd->u.lov;
1301
1302         rc = lov_prep_getattr_set(exp, oinfo, &lovset);
1303         if (rc)
1304                 RETURN(rc);
1305
1306         CDEBUG(D_INFO, "objid "LPX64": %ux%u byte stripes\n",
1307                oinfo->oi_md->lsm_object_id, oinfo->oi_md->lsm_stripe_count,
1308                oinfo->oi_md->lsm_stripe_size);
1309
1310         list_for_each (pos, &lovset->set_list) {
1311                 req = list_entry(pos, struct lov_request, rq_link);
1312
1313                 CDEBUG(D_INFO, "objid "LPX64"[%d] has subobj "LPX64" at idx "
1314                        "%u\n", oinfo->oi_oa->o_id, req->rq_stripe,
1315                        req->rq_oi.oi_oa->o_id, req->rq_idx);
1316                 rc = obd_getattr_async(lov->lov_tgts[req->rq_idx]->ltd_exp,
1317                                        &req->rq_oi, rqset);
1318                 if (rc) {
1319                         CERROR("error: getattr objid "LPX64" subobj "
1320                                LPX64" on OST idx %d: rc = %d\n",
1321                                oinfo->oi_oa->o_id, req->rq_oi.oi_oa->o_id,
1322                                req->rq_idx, rc);
1323                         GOTO(out, rc);
1324                 }
1325         }
1326
1327         if (!list_empty(&rqset->set_requests)) {
1328                 LASSERT(rc == 0);
1329                 LASSERT (rqset->set_interpret == NULL);
1330                 rqset->set_interpret = lov_getattr_interpret;
1331                 rqset->set_arg = (void *)lovset;
1332                 RETURN(rc);
1333         }
1334 out:
1335         if (rc)
1336                 lovset->set_completes = 0;
1337         err = lov_fini_getattr_set(lovset);
1338         RETURN(rc ? rc : err);
1339 }
1340
1341 static int lov_setattr(struct obd_export *exp, struct obd_info *oinfo,
1342                        struct obd_trans_info *oti)
1343 {
1344         struct lov_request_set *set;
1345         struct lov_obd *lov;
1346         struct list_head *pos;
1347         struct lov_request *req;
1348         int err = 0, rc = 0;
1349         ENTRY;
1350
1351         LASSERT(oinfo);
1352         ASSERT_LSM_MAGIC(oinfo->oi_md);
1353
1354         if (!exp || !exp->exp_obd)
1355                 RETURN(-ENODEV);
1356
1357         /* for now, we only expect the following updates here */
1358         LASSERT(!(oinfo->oi_oa->o_valid & ~(OBD_MD_FLID | OBD_MD_FLTYPE |
1359                                             OBD_MD_FLMODE | OBD_MD_FLATIME |
1360                                             OBD_MD_FLMTIME | OBD_MD_FLCTIME |
1361                                             OBD_MD_FLFLAGS | OBD_MD_FLSIZE |
1362                                             OBD_MD_FLGROUP | OBD_MD_FLUID |
1363                                             OBD_MD_FLGID | OBD_MD_FLFID |
1364                                             OBD_MD_FLGENER)));
1365         lov = &exp->exp_obd->u.lov;
1366         rc = lov_prep_setattr_set(exp, oinfo, oti, &set);
1367         if (rc)
1368                 RETURN(rc);
1369
1370         list_for_each (pos, &set->set_list) {
1371                 req = list_entry(pos, struct lov_request, rq_link);
1372
1373                 rc = obd_setattr(lov->lov_tgts[req->rq_idx]->ltd_exp,
1374                                  &req->rq_oi, NULL);
1375                 err = lov_update_setattr_set(set, req, rc);
1376                 if (err) {
1377                         CERROR("error: setattr objid "LPX64" subobj "
1378                                LPX64" on OST idx %d: rc = %d\n",
1379                                set->set_oi->oi_oa->o_id,
1380                                req->rq_oi.oi_oa->o_id, req->rq_idx, err);
1381                         if (!rc)
1382                                 rc = err;
1383                 }
1384         }
1385         err = lov_fini_setattr_set(set);
1386         if (!rc)
1387                 rc = err;
1388         RETURN(rc);
1389 }
1390
1391 static int lov_setattr_interpret(struct ptlrpc_request_set *rqset,
1392                                  void *data, int rc)
1393 {
1394         struct lov_request_set *lovset = (struct lov_request_set *)data;
1395         int err;
1396         ENTRY;
1397
1398         if (rc)
1399                 lovset->set_completes = 0;
1400         err = lov_fini_setattr_set(lovset);
1401         RETURN(rc ? rc : err);
1402 }
1403
1404 /* If @oti is given, the request goes from MDS and responses from OSTs are not
1405    needed. Otherwise, a client is waiting for responses. */
1406 static int lov_setattr_async(struct obd_export *exp, struct obd_info *oinfo,
1407                              struct obd_trans_info *oti,
1408                              struct ptlrpc_request_set *rqset)
1409 {
1410         struct lov_request_set *set;
1411         struct lov_request *req;
1412         struct list_head *pos;
1413         struct lov_obd *lov;
1414         int rc = 0;
1415         ENTRY;
1416
1417         LASSERT(oinfo);
1418         ASSERT_LSM_MAGIC(oinfo->oi_md);
1419         if (oinfo->oi_oa->o_valid & OBD_MD_FLCOOKIE) {
1420                 LASSERT(oti);
1421                 LASSERT(oti->oti_logcookies);
1422         }
1423
1424         if (!exp || !exp->exp_obd)
1425                 RETURN(-ENODEV);
1426
1427         lov = &exp->exp_obd->u.lov;
1428         rc = lov_prep_setattr_set(exp, oinfo, oti, &set);
1429         if (rc)
1430                 RETURN(rc);
1431
1432         CDEBUG(D_INFO, "objid "LPX64": %ux%u byte stripes\n",
1433                oinfo->oi_md->lsm_object_id, oinfo->oi_md->lsm_stripe_count,
1434                oinfo->oi_md->lsm_stripe_size);
1435
1436         list_for_each (pos, &set->set_list) {
1437                 req = list_entry(pos, struct lov_request, rq_link);
1438
1439                 if (oinfo->oi_oa->o_valid & OBD_MD_FLCOOKIE)
1440                         oti->oti_logcookies = set->set_cookies + req->rq_stripe;
1441
1442                 CDEBUG(D_INFO, "objid "LPX64"[%d] has subobj "LPX64" at idx "
1443                        "%u\n", oinfo->oi_oa->o_id, req->rq_stripe,
1444                        req->rq_oi.oi_oa->o_id, req->rq_idx);
1445
1446                 rc = obd_setattr_async(lov->lov_tgts[req->rq_idx]->ltd_exp,
1447                                        &req->rq_oi, oti, rqset);
1448                 if (rc) {
1449                         CERROR("error: setattr objid "LPX64" subobj "
1450                                LPX64" on OST idx %d: rc = %d\n",
1451                                set->set_oi->oi_oa->o_id,
1452                                req->rq_oi.oi_oa->o_id,
1453                                req->rq_idx, rc);
1454                         break;
1455                 }
1456         }
1457
1458         /* If we are not waiting for responses on async requests, return. */
1459         if (rc || !rqset || list_empty(&rqset->set_requests)) {
1460                 int err;
1461                 if (rc)
1462                         set->set_completes = 0;
1463                 err = lov_fini_setattr_set(set);
1464                 RETURN(rc ? rc : err);
1465         }
1466
1467         LASSERT(rqset->set_interpret == NULL);
1468         rqset->set_interpret = lov_setattr_interpret;
1469         rqset->set_arg = (void *)set;
1470
1471         RETURN(0);
1472 }
1473
1474 static int lov_punch_interpret(struct ptlrpc_request_set *rqset,
1475                                void *data, int rc)
1476 {
1477         struct lov_request_set *lovset = (struct lov_request_set *)data;
1478         int err;
1479         ENTRY;
1480
1481         if (rc)
1482                 lovset->set_completes = 0;
1483         err = lov_fini_punch_set(lovset);
1484         RETURN(rc ? rc : err);
1485 }
1486
1487 /* FIXME: maybe we'll just make one node the authoritative attribute node, then
1488  * we can send this 'punch' to just the authoritative node and the nodes
1489  * that the punch will affect. */
1490 static int lov_punch(struct obd_export *exp, struct obd_info *oinfo,
1491                      struct obd_trans_info *oti,
1492                      struct ptlrpc_request_set *rqset)
1493 {
1494         struct lov_request_set *set;
1495         struct lov_obd *lov;
1496         struct list_head *pos;
1497         struct lov_request *req;
1498         int rc = 0;
1499         ENTRY;
1500
1501         LASSERT(oinfo);
1502         ASSERT_LSM_MAGIC(oinfo->oi_md);
1503
1504         if (!exp || !exp->exp_obd)
1505                 RETURN(-ENODEV);
1506
1507         lov = &exp->exp_obd->u.lov;
1508         rc = lov_prep_punch_set(exp, oinfo, oti, &set);
1509         if (rc)
1510                 RETURN(rc);
1511
1512         list_for_each (pos, &set->set_list) {
1513                 req = list_entry(pos, struct lov_request, rq_link);
1514
1515                 rc = obd_punch(lov->lov_tgts[req->rq_idx]->ltd_exp,
1516                                &req->rq_oi, NULL, rqset);
1517                 if (rc) {
1518                         CERROR("error: punch objid "LPX64" subobj "LPX64
1519                                " on OST idx %d: rc = %d\n",
1520                                set->set_oi->oi_oa->o_id,
1521                                req->rq_oi.oi_oa->o_id, req->rq_idx, rc);
1522                         break;
1523                 }
1524         }
1525
1526         if (rc || list_empty(&rqset->set_requests)) {
1527                 int err;
1528                 err = lov_fini_punch_set(set);
1529                 RETURN(rc ? rc : err);
1530         }
1531
1532         LASSERT(rqset->set_interpret == NULL);
1533         rqset->set_interpret = lov_punch_interpret;
1534         rqset->set_arg = (void *)set;
1535
1536         RETURN(0);
1537 }
1538
1539 static int lov_sync(struct obd_export *exp, struct obdo *oa,
1540                     struct lov_stripe_md *lsm, obd_off start, obd_off end,
1541                     void *capa)
1542 {
1543         struct lov_request_set *set;
1544         struct obd_info oinfo;
1545         struct lov_obd *lov;
1546         struct list_head *pos;
1547         struct lov_request *req;
1548         int err = 0, rc = 0;
1549         ENTRY;
1550
1551         ASSERT_LSM_MAGIC(lsm);
1552
1553         if (!exp->exp_obd)
1554                 RETURN(-ENODEV);
1555
1556         lov = &exp->exp_obd->u.lov;
1557         rc = lov_prep_sync_set(exp, &oinfo, oa, lsm, start, end, &set);
1558         if (rc)
1559                 RETURN(rc);
1560
1561         list_for_each (pos, &set->set_list) {
1562                 req = list_entry(pos, struct lov_request, rq_link);
1563
1564                 rc = obd_sync(lov->lov_tgts[req->rq_idx]->ltd_exp,
1565                               req->rq_oi.oi_oa, NULL,
1566                               req->rq_oi.oi_policy.l_extent.start,
1567                               req->rq_oi.oi_policy.l_extent.end, capa);
1568                 err = lov_update_common_set(set, req, rc);
1569                 if (err) {
1570                         CERROR("error: fsync objid "LPX64" subobj "LPX64
1571                                " on OST idx %d: rc = %d\n",
1572                                set->set_oi->oi_oa->o_id,
1573                                req->rq_oi.oi_oa->o_id, req->rq_idx, rc);
1574                         if (!rc)
1575                                 rc = err;
1576                 }
1577         }
1578         err = lov_fini_sync_set(set);
1579         if (!rc)
1580                 rc = err;
1581         RETURN(rc);
1582 }
1583
1584 static int lov_brw_check(struct lov_obd *lov, struct obd_info *lov_oinfo,
1585                          obd_count oa_bufs, struct brw_page *pga)
1586 {
1587         struct obd_info oinfo = { { { 0 } } };
1588         int i, rc = 0;
1589
1590         oinfo.oi_oa = lov_oinfo->oi_oa;
1591
1592         /* The caller just wants to know if there's a chance that this
1593          * I/O can succeed */
1594         for (i = 0; i < oa_bufs; i++) {
1595                 int stripe = lov_stripe_number(lov_oinfo->oi_md, pga[i].off);
1596                 int ost = lov_oinfo->oi_md->lsm_oinfo[stripe]->loi_ost_idx;
1597                 obd_off start, end;
1598
1599                 if (!lov_stripe_intersects(lov_oinfo->oi_md, i, pga[i].off,
1600                                            pga[i].off + pga[i].count - 1,
1601                                            &start, &end))
1602                         continue;
1603
1604                 if (!lov->lov_tgts[ost] || !lov->lov_tgts[ost]->ltd_active) {
1605                         CDEBUG(D_HA, "lov idx %d inactive\n", ost);
1606                         return -EIO;
1607                 }
1608
1609                 rc = obd_brw(OBD_BRW_CHECK, lov->lov_tgts[ost]->ltd_exp, &oinfo,
1610                              1, &pga[i], NULL);
1611                 if (rc)
1612                         break;
1613         }
1614         return rc;
1615 }
1616
1617 static int lov_brw(int cmd, struct obd_export *exp, struct obd_info *oinfo,
1618                    obd_count oa_bufs, struct brw_page *pga,
1619                    struct obd_trans_info *oti)
1620 {
1621         struct lov_request_set *set;
1622         struct lov_request *req;
1623         struct list_head *pos;
1624         struct lov_obd *lov = &exp->exp_obd->u.lov;
1625         int err, rc = 0;
1626         ENTRY;
1627
1628         ASSERT_LSM_MAGIC(oinfo->oi_md);
1629
1630         if (cmd == OBD_BRW_CHECK) {
1631                 rc = lov_brw_check(lov, oinfo, oa_bufs, pga);
1632                 RETURN(rc);
1633         }
1634
1635         rc = lov_prep_brw_set(exp, oinfo, oa_bufs, pga, oti, &set);
1636         if (rc)
1637                 RETURN(rc);
1638
1639         list_for_each (pos, &set->set_list) {
1640                 struct obd_export *sub_exp;
1641                 struct brw_page *sub_pga;
1642                 req = list_entry(pos, struct lov_request, rq_link);
1643
1644                 sub_exp = lov->lov_tgts[req->rq_idx]->ltd_exp;
1645                 sub_pga = set->set_pga + req->rq_pgaidx;
1646                 rc = obd_brw(cmd, sub_exp, &req->rq_oi, req->rq_oabufs,
1647                              sub_pga, oti);
1648                 if (rc)
1649                         break;
1650                 lov_update_common_set(set, req, rc);
1651         }
1652
1653         err = lov_fini_brw_set(set);
1654         if (!rc)
1655                 rc = err;
1656         RETURN(rc);
1657 }
1658
1659 static int lov_enqueue_interpret(struct ptlrpc_request_set *rqset,
1660                                  void *data, int rc)
1661 {
1662         struct lov_request_set *lovset = (struct lov_request_set *)data;
1663         ENTRY;
1664         rc = lov_fini_enqueue_set(lovset, lovset->set_ei->ei_mode, rc, rqset);
1665         RETURN(rc);
1666 }
1667
1668 static int lov_enqueue(struct obd_export *exp, struct obd_info *oinfo,
1669                        struct ldlm_enqueue_info *einfo,
1670                        struct ptlrpc_request_set *rqset)
1671 {
1672         ldlm_mode_t mode = einfo->ei_mode;
1673         struct lov_request_set *set;
1674         struct lov_request *req;
1675         struct list_head *pos;
1676         struct lov_obd *lov;
1677         ldlm_error_t rc;
1678         ENTRY;
1679
1680         LASSERT(oinfo);
1681         ASSERT_LSM_MAGIC(oinfo->oi_md);
1682         LASSERT(mode == (mode & -mode));
1683
1684         /* we should never be asked to replay a lock this way. */
1685         LASSERT((oinfo->oi_flags & LDLM_FL_REPLAY) == 0);
1686
1687         if (!exp || !exp->exp_obd)
1688                 RETURN(-ENODEV);
1689
1690         lov = &exp->exp_obd->u.lov;
1691         rc = lov_prep_enqueue_set(exp, oinfo, einfo, &set);
1692         if (rc)
1693                 RETURN(rc);
1694
1695         list_for_each (pos, &set->set_list) {
1696                 req = list_entry(pos, struct lov_request, rq_link);
1697
1698                 rc = obd_enqueue(lov->lov_tgts[req->rq_idx]->ltd_exp,
1699                                  &req->rq_oi, einfo, rqset);
1700                 if (rc != ELDLM_OK)
1701                         GOTO(out, rc);
1702         }
1703
1704         if (rqset && !list_empty(&rqset->set_requests)) {
1705                 LASSERT(rc == 0);
1706                 LASSERT(rqset->set_interpret == NULL);
1707                 rqset->set_interpret = lov_enqueue_interpret;
1708                 rqset->set_arg = (void *)set;
1709                 RETURN(rc);
1710         }
1711 out:
1712         rc = lov_fini_enqueue_set(set, mode, rc, rqset);
1713         RETURN(rc);
1714 }
1715
1716 static int lov_change_cbdata(struct obd_export *exp,
1717                              struct lov_stripe_md *lsm, ldlm_iterator_t it,
1718                              void *data)
1719 {
1720         struct lov_obd *lov;
1721         int rc = 0, i;
1722         ENTRY;
1723
1724         ASSERT_LSM_MAGIC(lsm);
1725
1726         if (!exp || !exp->exp_obd)
1727                 RETURN(-ENODEV);
1728
1729         LASSERT_MDS_GROUP(lsm->lsm_object_gr);
1730
1731         lov = &exp->exp_obd->u.lov;
1732         for (i = 0; i < lsm->lsm_stripe_count; i++) {
1733                 struct lov_stripe_md submd;
1734                 struct lov_oinfo *loi = lsm->lsm_oinfo[i];
1735
1736                 if (!lov->lov_tgts[loi->loi_ost_idx]) {
1737                         CDEBUG(D_HA, "lov idx %d NULL \n", loi->loi_ost_idx);
1738                         continue;
1739                 }
1740
1741                 submd.lsm_object_id = loi->loi_id;
1742                 submd.lsm_object_gr = lsm->lsm_object_gr;
1743                 submd.lsm_stripe_count = 0;
1744                 rc = obd_change_cbdata(lov->lov_tgts[loi->loi_ost_idx]->ltd_exp,
1745                                        &submd, it, data);
1746         }
1747         RETURN(rc);
1748 }
1749
1750 static int lov_cancel(struct obd_export *exp, struct lov_stripe_md *lsm,
1751                       __u32 mode, struct lustre_handle *lockh)
1752 {
1753         struct lov_request_set *set;
1754         struct obd_info oinfo;
1755         struct lov_request *req;
1756         struct list_head *pos;
1757         struct lov_obd *lov;
1758         struct lustre_handle *lov_lockhp;
1759         int err = 0, rc = 0;
1760         ENTRY;
1761
1762         ASSERT_LSM_MAGIC(lsm);
1763
1764         if (!exp || !exp->exp_obd)
1765                 RETURN(-ENODEV);
1766
1767         LASSERT_MDS_GROUP(lsm->lsm_object_gr);
1768         LASSERT(lockh);
1769         lov = &exp->exp_obd->u.lov;
1770         rc = lov_prep_cancel_set(exp, &oinfo, lsm, mode, lockh, &set);
1771         if (rc)
1772                 RETURN(rc);
1773
1774         list_for_each (pos, &set->set_list) {
1775                 req = list_entry(pos, struct lov_request, rq_link);
1776                 lov_lockhp = set->set_lockh->llh_handles + req->rq_stripe;
1777
1778                 rc = obd_cancel(lov->lov_tgts[req->rq_idx]->ltd_exp,
1779                                 req->rq_oi.oi_md, mode, lov_lockhp);
1780                 rc = lov_update_common_set(set, req, rc);
1781                 if (rc) {
1782                         CERROR("error: cancel objid "LPX64" subobj "
1783                                LPX64" on OST idx %d: rc = %d\n",
1784                                lsm->lsm_object_id,
1785                                req->rq_oi.oi_md->lsm_object_id,
1786                                req->rq_idx, rc);
1787                         err = rc;
1788                 }
1789
1790         }
1791         lov_fini_cancel_set(set);
1792         RETURN(err);
1793 }
1794
1795 static int lov_cancel_unused(struct obd_export *exp,
1796                              struct lov_stripe_md *lsm,
1797                              int flags, void *opaque)
1798 {
1799         struct lov_obd *lov;
1800         int rc = 0, i;
1801         ENTRY;
1802
1803         if (!exp || !exp->exp_obd)
1804                 RETURN(-ENODEV);
1805
1806         lov = &exp->exp_obd->u.lov;
1807         if (lsm == NULL) {
1808                 for (i = 0; i < lov->desc.ld_tgt_count; i++) {
1809                         int err;
1810                         if (!lov->lov_tgts[i] || !lov->lov_tgts[i]->ltd_exp)
1811                                 continue;
1812
1813                         err = obd_cancel_unused(lov->lov_tgts[i]->ltd_exp, NULL,
1814                                                 flags, opaque);
1815                         if (!rc)
1816                                 rc = err;
1817                 }
1818                 RETURN(rc);
1819         }
1820
1821         ASSERT_LSM_MAGIC(lsm);
1822
1823         LASSERT_MDS_GROUP(lsm->lsm_object_gr);
1824         for (i = 0; i < lsm->lsm_stripe_count; i++) {
1825                 struct lov_stripe_md submd;
1826                 struct lov_oinfo *loi = lsm->lsm_oinfo[i];
1827                 int err;
1828
1829                 if (!lov->lov_tgts[loi->loi_ost_idx]) {
1830                         CDEBUG(D_HA, "lov idx %d NULL\n", loi->loi_ost_idx);
1831                         continue;
1832                 }
1833
1834                 if (!lov->lov_tgts[loi->loi_ost_idx]->ltd_active)
1835                         CDEBUG(D_HA, "lov idx %d inactive\n", loi->loi_ost_idx);
1836
1837                 submd.lsm_object_id = loi->loi_id;
1838                 submd.lsm_object_gr = lsm->lsm_object_gr;
1839                 submd.lsm_stripe_count = 0;
1840                 err = obd_cancel_unused(lov->lov_tgts[loi->loi_ost_idx]->ltd_exp,
1841                                         &submd, flags, opaque);
1842                 if (err && lov->lov_tgts[loi->loi_ost_idx]->ltd_active) {
1843                         CERROR("error: cancel unused objid "LPX64" subobj "LPX64
1844                                " on OST idx %d: rc = %d\n", lsm->lsm_object_id,
1845                                loi->loi_id, loi->loi_ost_idx, err);
1846                         if (!rc)
1847                                 rc = err;
1848                 }
1849         }
1850         RETURN(rc);
1851 }
1852
1853 int lov_statfs_interpret(struct ptlrpc_request_set *rqset, void *data, int rc)
1854 {
1855         struct lov_request_set *lovset = (struct lov_request_set *)data;
1856         int err;
1857         ENTRY;
1858
1859         if (rc)
1860                 lovset->set_completes = 0;
1861
1862         err = lov_fini_statfs_set(lovset);
1863         RETURN(rc ? rc : err);
1864 }
1865
1866 static int lov_statfs_async(struct obd_device *obd, struct obd_info *oinfo,
1867                             __u64 max_age, struct ptlrpc_request_set *rqset)
1868 {
1869         struct lov_request_set *set;
1870         struct lov_request *req;
1871         struct list_head *pos;
1872         struct lov_obd *lov;
1873         int rc = 0;
1874         ENTRY;
1875
1876         LASSERT(oinfo != NULL);
1877         LASSERT(oinfo->oi_osfs != NULL);
1878
1879         lov = &obd->u.lov;
1880         rc = lov_prep_statfs_set(obd, oinfo, &set);
1881         if (rc)
1882                 RETURN(rc);
1883
1884         list_for_each (pos, &set->set_list) {
1885                 struct obd_device *osc_obd;
1886
1887                 req = list_entry(pos, struct lov_request, rq_link);
1888
1889                 osc_obd = class_exp2obd(lov->lov_tgts[req->rq_idx]->ltd_exp);
1890                 rc = obd_statfs_async(osc_obd, &req->rq_oi, max_age, rqset);
1891                 if (rc)
1892                         break;
1893         }
1894
1895         if (rc || list_empty(&rqset->set_requests)) {
1896                 int err;
1897                 if (rc)
1898                         set->set_completes = 0;
1899                 err = lov_fini_statfs_set(set);
1900                 RETURN(rc ? rc : err);
1901         }
1902
1903         LASSERT(rqset->set_interpret == NULL);
1904         rqset->set_interpret = lov_statfs_interpret;
1905         rqset->set_arg = (void *)set;
1906         RETURN(0);
1907 }
1908
1909 static int lov_statfs(struct obd_device *obd, struct obd_statfs *osfs,
1910                       __u64 max_age, __u32 flags)
1911 {
1912         struct ptlrpc_request_set *set = NULL;
1913         struct obd_info oinfo = { { { 0 } } };
1914         int rc = 0;
1915         ENTRY;
1916
1917
1918         /* for obdclass we forbid using obd_statfs_rqset, but prefer using async
1919          * statfs requests */
1920         set = ptlrpc_prep_set();
1921         if (set == NULL)
1922                 RETURN(-ENOMEM);
1923
1924         oinfo.oi_osfs = osfs;
1925         oinfo.oi_flags = flags;
1926         rc = lov_statfs_async(obd, &oinfo, max_age, set);
1927         if (rc == 0)
1928                 rc = ptlrpc_set_wait(set);
1929         ptlrpc_set_destroy(set);
1930
1931         RETURN(rc);
1932 }
1933
1934 static int lov_iocontrol(unsigned int cmd, struct obd_export *exp, int len,
1935                          void *karg, void *uarg)
1936 {
1937         struct obd_device *obddev = class_exp2obd(exp);
1938         struct lov_obd *lov = &obddev->u.lov;
1939         int i = 0, rc = 0, count = lov->desc.ld_tgt_count;
1940         struct obd_uuid *uuidp;
1941         ENTRY;
1942
1943         switch (cmd) {
1944         case IOC_OBD_STATFS: {
1945                 struct obd_ioctl_data *data = karg;
1946                 struct obd_device *osc_obd;
1947                 struct obd_statfs stat_buf = {0};
1948                 __u32 index;
1949
1950                 memcpy(&index, data->ioc_inlbuf2, sizeof(__u32));
1951                 LASSERT(data->ioc_plen1 == sizeof(struct obd_statfs));
1952
1953                 if ((index >= count))
1954                         RETURN(-ENODEV);
1955
1956                 if (!lov->lov_tgts[index])
1957                         /* Try again with the next index */
1958                         RETURN(-EAGAIN);
1959                 if (!lov->lov_tgts[index]->ltd_active)
1960                         RETURN(-ENODATA);
1961
1962                 osc_obd = class_exp2obd(lov->lov_tgts[index]->ltd_exp);
1963                 if (!osc_obd)
1964                         RETURN(-EINVAL);
1965
1966                 /* got statfs data */
1967                 rc = obd_statfs(osc_obd, &stat_buf,
1968                                 cfs_time_current_64() - HZ, 0);
1969                 if (rc)
1970                         RETURN(rc);
1971                 if (copy_to_user(data->ioc_pbuf1, &stat_buf, data->ioc_plen1))
1972                         RETURN(-EFAULT);
1973                 /* copy UUID */
1974                 if (copy_to_user(data->ioc_pbuf2, obd2cli_tgt(osc_obd),
1975                                  data->ioc_plen2))
1976                         RETURN(-EFAULT);
1977                 break;
1978         }
1979         case OBD_IOC_LOV_GET_CONFIG: {
1980                 struct obd_ioctl_data *data;
1981                 struct lov_desc *desc;
1982                 char *buf = NULL;
1983                 __u32 *genp;
1984
1985                 len = 0;
1986                 if (obd_ioctl_getdata(&buf, &len, (void *)uarg))
1987                         RETURN(-EINVAL);
1988
1989                 data = (struct obd_ioctl_data *)buf;
1990
1991                 if (sizeof(*desc) > data->ioc_inllen1) {
1992                         obd_ioctl_freedata(buf, len);
1993                         RETURN(-EINVAL);
1994                 }
1995
1996                 if (sizeof(uuidp->uuid) * count > data->ioc_inllen2) {
1997                         obd_ioctl_freedata(buf, len);
1998                         RETURN(-EINVAL);
1999                 }
2000
2001                 if (sizeof(__u32) * count > data->ioc_inllen3) {
2002                         obd_ioctl_freedata(buf, len);
2003                         RETURN(-EINVAL);
2004                 }
2005
2006                 desc = (struct lov_desc *)data->ioc_inlbuf1;
2007                 memcpy(desc, &(lov->desc), sizeof(*desc));
2008
2009                 uuidp = (struct obd_uuid *)data->ioc_inlbuf2;
2010                 genp = (__u32 *)data->ioc_inlbuf3;
2011                 /* the uuid will be empty for deleted OSTs */
2012                 for (i = 0; i < count; i++, uuidp++, genp++) {
2013                         if (!lov->lov_tgts[i])
2014                                 continue;
2015                         *uuidp = lov->lov_tgts[i]->ltd_uuid;
2016                         *genp = lov->lov_tgts[i]->ltd_gen;
2017                 }
2018
2019                 if (copy_to_user((void *)uarg, buf, len))
2020                         rc = -EFAULT;
2021                 obd_ioctl_freedata(buf, len);
2022                 break;
2023         }
2024         case LL_IOC_LOV_SETSTRIPE:
2025                 rc = lov_setstripe(exp, len, karg, uarg);
2026                 break;
2027         case LL_IOC_LOV_GETSTRIPE:
2028                 rc = lov_getstripe(exp, karg, uarg);
2029                 break;
2030         case LL_IOC_LOV_SETEA:
2031                 rc = lov_setea(exp, karg, uarg);
2032                 break;
2033         case OBD_IOC_QUOTACTL: {
2034                 struct if_quotactl *qctl = karg;
2035                 struct lov_tgt_desc *tgt = NULL;
2036                 struct obd_quotactl *oqctl;
2037
2038                 if (qctl->qc_valid == QC_OSTIDX) {
2039                         if (qctl->qc_idx < 0 || count <= qctl->qc_idx)
2040                                 RETURN(-EINVAL);
2041
2042                         tgt = lov->lov_tgts[qctl->qc_idx];
2043                         if (!tgt || !tgt->ltd_exp)
2044                                 RETURN(-EINVAL);
2045                 } else if (qctl->qc_valid == QC_UUID) {
2046                         for (i = 0; i < count; i++) {
2047                                 tgt = lov->lov_tgts[i];
2048                                 if (!tgt ||
2049                                     !obd_uuid_equals(&tgt->ltd_uuid,
2050                                                      &qctl->obd_uuid))
2051                                         continue;
2052
2053                                 if (tgt->ltd_exp == NULL)
2054                                         RETURN(-EINVAL);
2055
2056                                 break;
2057                         }
2058                 } else {
2059                         RETURN(-EINVAL);
2060                 }
2061
2062                 if (i >= count)
2063                         RETURN(-EAGAIN);
2064
2065                 LASSERT(tgt && tgt->ltd_exp);
2066                 OBD_ALLOC_PTR(oqctl);
2067                 if (!oqctl)
2068                         RETURN(-ENOMEM);
2069
2070                 QCTL_COPY(oqctl, qctl);
2071                 rc = obd_quotactl(tgt->ltd_exp, oqctl);
2072                 if (rc == 0) {
2073                         QCTL_COPY(qctl, oqctl);
2074                         qctl->qc_valid = QC_OSTIDX;
2075                         qctl->obd_uuid = tgt->ltd_uuid;
2076                 }
2077                 OBD_FREE_PTR(oqctl);
2078                 break;
2079         }
2080         default: {
2081                 int set = 0;
2082
2083                 if (count == 0)
2084                         RETURN(-ENOTTY);
2085
2086                 for (i = 0; i < count; i++) {
2087                         int err;
2088
2089                         /* OST was disconnected */
2090                         if (!lov->lov_tgts[i] || !lov->lov_tgts[i]->ltd_exp)
2091                                 continue;
2092
2093                         err = obd_iocontrol(cmd, lov->lov_tgts[i]->ltd_exp,
2094                                             len, karg, uarg);
2095                         if (err == -ENODATA && cmd == OBD_IOC_POLL_QUOTACHECK) {
2096                                 RETURN(err);
2097                         } else if (err) {
2098                                 if (lov->lov_tgts[i]->ltd_active) {
2099                                         CDEBUG(err == -ENOTTY ?
2100                                                D_IOCTL : D_WARNING,
2101                                                "iocontrol OSC %s on OST "
2102                                                "idx %d cmd %x: err = %d\n",
2103                                                lov_uuid2str(lov, i),
2104                                                i, cmd, err);
2105                                         if (!rc)
2106                                                 rc = err;
2107                                 }
2108                         } else {
2109                                 set = 1;
2110                         }
2111                 }
2112                 if (!set && !rc)
2113                         rc = -EIO;
2114         }
2115         }
2116
2117         RETURN(rc);
2118 }
2119
2120 #define FIEMAP_BUFFER_SIZE 4096
2121
2122 /**
2123  * Non-zero fe_logical indicates that this is a continuation FIEMAP
2124  * call. The local end offset and the device are sent in the first
2125  * fm_extent. This function calculates the stripe number from the index.
2126  * This function returns a stripe_no on which mapping is to be restarted.
2127  *
2128  * This function returns fm_end_offset which is the in-OST offset at which
2129  * mapping should be restarted. If fm_end_offset=0 is returned then caller
2130  * will re-calculate proper offset in next stripe.
2131  * Note that the first extent is passed to lov_get_info via the value field.
2132  *
2133  * \param fiemap fiemap request header
2134  * \param lsm striping information for the file
2135  * \param fm_start logical start of mapping
2136  * \param fm_end logical end of mapping
2137  * \param start_stripe starting stripe will be returned in this
2138  */
2139 obd_size fiemap_calc_fm_end_offset(struct ll_user_fiemap *fiemap,
2140                                    struct lov_stripe_md *lsm, obd_size fm_start,
2141                                    obd_size fm_end, int *start_stripe)
2142 {
2143         obd_size local_end = fiemap->fm_extents[0].fe_logical;
2144         obd_off lun_start, lun_end;
2145         obd_size fm_end_offset;
2146         int stripe_no = -1, i;
2147
2148         if (fiemap->fm_extent_count == 0 ||
2149             fiemap->fm_extents[0].fe_logical == 0)
2150                 return 0;
2151
2152         /* Find out stripe_no from ost_index saved in the fe_device */
2153         for (i = 0; i < lsm->lsm_stripe_count; i++) {
2154                 if (lsm->lsm_oinfo[i]->loi_ost_idx ==
2155                                         fiemap->fm_extents[0].fe_device) {
2156                         stripe_no = i;
2157                         break;
2158                 }
2159         }
2160
2161         /* If we have finished mapping on previous device, shift logical
2162          * offset to start of next device */
2163         if ((lov_stripe_intersects(lsm, stripe_no, fm_start, fm_end,
2164                                    &lun_start, &lun_end)) != 0 &&
2165                                    local_end < lun_end) {
2166                 fm_end_offset = local_end;
2167                 *start_stripe = stripe_no;
2168         } else {
2169                 /* This is a special value to indicate that caller should
2170                  * calculate offset in next stripe. */
2171                 fm_end_offset = 0;
2172                 *start_stripe = (stripe_no + 1) % lsm->lsm_stripe_count;
2173         }
2174
2175         return fm_end_offset;
2176 }
2177
2178 /**
2179  * We calculate on which OST the mapping will end. If the length of mapping
2180  * is greater than (stripe_size * stripe_count) then the last_stripe will
2181  * will be one just before start_stripe. Else we check if the mapping
2182  * intersects each OST and find last_stripe.
2183  * This function returns the last_stripe and also sets the stripe_count
2184  * over which the mapping is spread
2185  *
2186  * \param lsm striping information for the file
2187  * \param fm_start logical start of mapping
2188  * \param fm_end logical end of mapping
2189  * \param start_stripe starting stripe of the mapping
2190  * \param stripe_count the number of stripes across which to map is returned
2191  *
2192  * \retval last_stripe return the last stripe of the mapping
2193  */
2194 int fiemap_calc_last_stripe(struct lov_stripe_md *lsm, obd_size fm_start,
2195                             obd_size fm_end, int start_stripe,
2196                             int *stripe_count)
2197 {
2198         int last_stripe;
2199         obd_off obd_start, obd_end;
2200         int i, j;
2201
2202         if (fm_end - fm_start > lsm->lsm_stripe_size * lsm->lsm_stripe_count) {
2203                 last_stripe = (start_stripe < 1 ? lsm->lsm_stripe_count - 1 :
2204                                                               start_stripe - 1);
2205                 *stripe_count = lsm->lsm_stripe_count;
2206         } else {
2207                 for (j = 0, i = start_stripe; j < lsm->lsm_stripe_count;
2208                      i = (i + 1) % lsm->lsm_stripe_count, j++) {
2209                         if ((lov_stripe_intersects(lsm, i, fm_start, fm_end,
2210                                                    &obd_start, &obd_end)) == 0)
2211                                 break;
2212                 }
2213                 *stripe_count = j;
2214                 last_stripe = (start_stripe + j - 1) %lsm->lsm_stripe_count;
2215         }
2216
2217         return last_stripe;
2218 }
2219
2220 /**
2221  * Set fe_device and copy extents from local buffer into main return buffer.
2222  *
2223  * \param fiemap fiemap request header
2224  * \param lcl_fm_ext array of local fiemap extents to be copied
2225  * \param ost_index OST index to be written into the fm_device field for each
2226                     extent
2227  * \param ext_count number of extents to be copied
2228  * \param current_extent where to start copying in main extent array
2229  */
2230 void fiemap_prepare_and_copy_exts(struct ll_user_fiemap *fiemap,
2231                                   struct ll_fiemap_extent *lcl_fm_ext,
2232                                   int ost_index, unsigned int ext_count,
2233                                   int current_extent)
2234 {
2235         char *to;
2236         int ext;
2237
2238         for (ext = 0; ext < ext_count; ext++) {
2239                 lcl_fm_ext[ext].fe_device = ost_index;
2240                 lcl_fm_ext[ext].fe_flags |= FIEMAP_EXTENT_NET;
2241         }
2242
2243         /* Copy fm_extent's from fm_local to return buffer */
2244         to = (char *)fiemap + fiemap_count_to_size(current_extent);
2245         memcpy(to, lcl_fm_ext, ext_count * sizeof(struct ll_fiemap_extent));
2246 }
2247
2248 /**
2249  * Break down the FIEMAP request and send appropriate calls to individual OSTs.
2250  * This also handles the restarting of FIEMAP calls in case mapping overflows
2251  * the available number of extents in single call.
2252  */
2253 static int lov_fiemap(struct lov_obd *lov, __u32 keylen, void *key,
2254                       __u32 *vallen, void *val, struct lov_stripe_md *lsm)
2255 {
2256         struct ll_fiemap_info_key *fm_key = key;
2257         struct ll_user_fiemap *fiemap = val;
2258         struct ll_user_fiemap *fm_local = NULL;
2259         struct ll_fiemap_extent *lcl_fm_ext;
2260         int count_local;
2261         unsigned int get_num_extents = 0;
2262         int ost_index = 0, actual_start_stripe, start_stripe;
2263         obd_size fm_start, fm_end, fm_length, fm_end_offset = 0;
2264         obd_size curr_loc;
2265         int current_extent = 0, rc = 0, i;
2266         int ost_eof = 0; /* EOF for object */
2267         int ost_done = 0; /* done with required mapping for this OST? */
2268         int last_stripe;
2269         int cur_stripe = 0, cur_stripe_wrap = 0, stripe_count;
2270         unsigned int buffer_size = FIEMAP_BUFFER_SIZE;
2271
2272         if (lsm == NULL)
2273                 GOTO(out, rc = 0);
2274
2275         if (fiemap_count_to_size(fm_key->fiemap.fm_extent_count) < buffer_size)
2276                 buffer_size = fiemap_count_to_size(fm_key->fiemap.fm_extent_count);
2277
2278         OBD_ALLOC(fm_local, buffer_size);
2279         if (fm_local == NULL)
2280                 GOTO(out, rc = -ENOMEM);
2281         lcl_fm_ext = &fm_local->fm_extents[0];
2282
2283         count_local = fiemap_size_to_count(buffer_size);
2284
2285         memcpy(fiemap, &fm_key->fiemap, sizeof(*fiemap));
2286         fm_start = fiemap->fm_start;
2287         fm_length = fiemap->fm_length;
2288         /* Calculate start stripe, last stripe and length of mapping */
2289         actual_start_stripe = start_stripe = lov_stripe_number(lsm, fm_start);
2290         fm_end = (fm_length == ~0ULL ? fm_key->oa.o_size :
2291                                                 fm_start + fm_length - 1);
2292         /* If fm_length != ~0ULL but fm_start+fm_length-1 exceeds file size */
2293         if (fm_end > fm_key->oa.o_size)
2294                 fm_end = fm_key->oa.o_size;
2295
2296         last_stripe = fiemap_calc_last_stripe(lsm, fm_start, fm_end,
2297                                             actual_start_stripe, &stripe_count);
2298
2299         fm_end_offset = fiemap_calc_fm_end_offset(fiemap, lsm, fm_start, fm_end,
2300                                                   &start_stripe);
2301
2302         if (fiemap->fm_extent_count == 0) {
2303                 get_num_extents = 1;
2304                 count_local = 0;
2305         }
2306
2307         /* Check each stripe */
2308         for (cur_stripe = start_stripe, i = 0; i < stripe_count;
2309              i++, cur_stripe = (cur_stripe + 1) % lsm->lsm_stripe_count) {
2310                 obd_size req_fm_len; /* Stores length of required mapping */
2311                 obd_size len_mapped_single_call;
2312                 obd_off lun_start, lun_end, obd_object_end;
2313                 unsigned int ext_count;
2314
2315                 cur_stripe_wrap = cur_stripe;
2316
2317                 /* Find out range of mapping on this stripe */
2318                 if ((lov_stripe_intersects(lsm, cur_stripe, fm_start, fm_end,
2319                                            &lun_start, &obd_object_end)) == 0)
2320                         continue;
2321
2322                 /* If this is a continuation FIEMAP call and we are on
2323                  * starting stripe then lun_start needs to be set to
2324                  * fm_end_offset */
2325                 if (fm_end_offset != 0 && cur_stripe == start_stripe)
2326                         lun_start = fm_end_offset;
2327
2328                 if (fm_length != ~0ULL) {
2329                         /* Handle fm_start + fm_length overflow */
2330                         if (fm_start + fm_length < fm_start)
2331                                 fm_length = ~0ULL - fm_start;
2332                         lun_end = lov_size_to_stripe(lsm, fm_start + fm_length,
2333                                                      cur_stripe);
2334                 } else {
2335                         lun_end = ~0ULL;
2336                 }
2337
2338                 if (lun_start == lun_end)
2339                         continue;
2340
2341                 req_fm_len = obd_object_end - lun_start;
2342                 fm_local->fm_length = 0;
2343                 len_mapped_single_call = 0;
2344
2345                 /* If the output buffer is very large and the objects have many
2346                  * extents we may need to loop on a single OST repeatedly */
2347                 ost_eof = 0;
2348                 ost_done = 0;
2349                 do {
2350                         if (get_num_extents == 0) {
2351                                 /* Don't get too many extents. */
2352                                 if (current_extent + count_local >
2353                                     fiemap->fm_extent_count)
2354                                         count_local = fiemap->fm_extent_count -
2355                                                                  current_extent;
2356                         }
2357
2358                         lun_start += len_mapped_single_call;
2359                         fm_local->fm_length = req_fm_len - len_mapped_single_call;
2360                         req_fm_len = fm_local->fm_length;
2361                         fm_local->fm_extent_count = count_local;
2362                         fm_local->fm_mapped_extents = 0;
2363                         fm_local->fm_flags = fiemap->fm_flags;
2364
2365                         fm_key->oa.o_id = lsm->lsm_oinfo[cur_stripe]->loi_id;
2366                         ost_index = lsm->lsm_oinfo[cur_stripe]->loi_ost_idx;
2367
2368                         if (ost_index < 0 || ost_index >=lov->desc.ld_tgt_count)
2369                                 GOTO(out, rc = -EINVAL);
2370
2371                         /* If OST is inactive, return extent with UNKNOWN flag */
2372                         if (!lov->lov_tgts[ost_index]->ltd_active) {
2373                                 fm_local->fm_flags |= FIEMAP_EXTENT_LAST;
2374                                 fm_local->fm_mapped_extents = 1;
2375
2376                                 lcl_fm_ext[0].fe_logical = lun_start;
2377                                 lcl_fm_ext[0].fe_length = obd_object_end -
2378                                                                       lun_start;
2379                                 lcl_fm_ext[0].fe_flags |= FIEMAP_EXTENT_UNKNOWN;
2380
2381                                 goto inactive_tgt;
2382                         }
2383
2384                         fm_local->fm_start = lun_start;
2385                         fm_local->fm_flags &= ~FIEMAP_FLAG_DEVICE_ORDER;
2386                         memcpy(&fm_key->fiemap, fm_local, sizeof(*fm_local));
2387                         *vallen=fiemap_count_to_size(fm_local->fm_extent_count);
2388                         rc = obd_get_info(lov->lov_tgts[ost_index]->ltd_exp,
2389                                           keylen, key, vallen, fm_local, lsm);
2390                         if (rc != 0)
2391                                 GOTO(out, rc);
2392
2393 inactive_tgt:
2394                         ext_count = fm_local->fm_mapped_extents;
2395                         if (ext_count == 0) {
2396                                 ost_done = 1;
2397                                 /* If last stripe has hole at the end,
2398                                  * then we need to return */
2399                                 if (cur_stripe_wrap == last_stripe) {
2400                                         fiemap->fm_mapped_extents = 0;
2401                                         goto finish;
2402                                 }
2403                                 break;
2404                         }
2405
2406                         /* If we just need num of extents then go to next device */
2407                         if (get_num_extents) {
2408                                 current_extent += ext_count;
2409                                 break;
2410                         }
2411
2412                         len_mapped_single_call = lcl_fm_ext[ext_count-1].fe_logical -
2413                                   lun_start + lcl_fm_ext[ext_count - 1].fe_length;
2414
2415                         /* Have we finished mapping on this device? */
2416                         if (req_fm_len <= len_mapped_single_call)
2417                                 ost_done = 1;
2418
2419                         /* Clear the EXTENT_LAST flag which can be present on
2420                          * last extent */
2421                         if (lcl_fm_ext[ext_count-1].fe_flags & FIEMAP_EXTENT_LAST)
2422                                 lcl_fm_ext[ext_count - 1].fe_flags &=
2423                                                             ~FIEMAP_EXTENT_LAST;
2424
2425                         curr_loc = lov_stripe_size(lsm,
2426                                            lcl_fm_ext[ext_count - 1].fe_logical+
2427                                            lcl_fm_ext[ext_count - 1].fe_length,
2428                                            cur_stripe);
2429                         if (curr_loc >= fm_key->oa.o_size)
2430                                 ost_eof = 1;
2431
2432                         fiemap_prepare_and_copy_exts(fiemap, lcl_fm_ext,
2433                                                      ost_index, ext_count,
2434                                                      current_extent);
2435
2436                         current_extent += ext_count;
2437
2438                         /* Ran out of available extents? */
2439                         if (current_extent >= fiemap->fm_extent_count)
2440                                 goto finish;
2441                 } while (ost_done == 0 && ost_eof == 0);
2442
2443                 if (cur_stripe_wrap == last_stripe)
2444                         goto finish;
2445         }
2446
2447 finish:
2448         /* Indicate that we are returning device offsets unless file just has
2449          * single stripe */
2450         if (lsm->lsm_stripe_count > 1)
2451                 fiemap->fm_flags |= FIEMAP_FLAG_DEVICE_ORDER;
2452
2453         if (get_num_extents)
2454                 goto skip_last_device_calc;
2455
2456         /* Check if we have reached the last stripe and whether mapping for that
2457          * stripe is done. */
2458         if (cur_stripe_wrap == last_stripe) {
2459                 if (ost_done || ost_eof)
2460                         fiemap->fm_extents[current_extent - 1].fe_flags |=
2461                                                              FIEMAP_EXTENT_LAST;
2462         }
2463
2464 skip_last_device_calc:
2465         fiemap->fm_mapped_extents = current_extent;
2466
2467 out:
2468         OBD_FREE(fm_local, buffer_size);
2469         return rc;
2470 }
2471
2472 static int lov_get_info(struct obd_export *exp, __u32 keylen,
2473                         void *key, __u32 *vallen, void *val,
2474                         struct lov_stripe_md *lsm)
2475 {
2476         struct obd_device *obddev = class_exp2obd(exp);
2477         struct lov_obd *lov = &obddev->u.lov;
2478         int i, rc;
2479         ENTRY;
2480
2481         if (!vallen || !val)
2482                 RETURN(-EFAULT);
2483
2484         obd_getref(obddev);
2485
2486         if (KEY_IS(KEY_LOCK_TO_STRIPE)) {
2487                 struct {
2488                         char name[16];
2489                         struct ldlm_lock *lock;
2490                 } *data = key;
2491                 struct ldlm_res_id *res_id = &data->lock->l_resource->lr_name;
2492                 struct lov_oinfo *loi;
2493                 __u32 *stripe = val;
2494
2495                 if (*vallen < sizeof(*stripe))
2496                         GOTO(out, rc = -EFAULT);
2497                 *vallen = sizeof(*stripe);
2498
2499                 /* XXX This is another one of those bits that will need to
2500                  * change if we ever actually support nested LOVs.  It uses
2501                  * the lock's export to find out which stripe it is. */
2502                 /* XXX - it's assumed all the locks for deleted OSTs have
2503                  * been cancelled. Also, the export for deleted OSTs will
2504                  * be NULL and won't match the lock's export. */
2505                 for (i = 0; i < lsm->lsm_stripe_count; i++) {
2506                         loi = lsm->lsm_oinfo[i];
2507                         if (!lov->lov_tgts[loi->loi_ost_idx])
2508                                 continue;
2509                         if (lov->lov_tgts[loi->loi_ost_idx]->ltd_exp ==
2510                             data->lock->l_conn_export &&
2511                             osc_res_name_eq(loi->loi_id, loi->loi_gr, res_id)) {
2512                                 *stripe = i;
2513                                 GOTO(out, rc = 0);
2514                         }
2515                 }
2516                 LDLM_ERROR(data->lock, "lock on inode without such object");
2517                 dump_lsm(D_ERROR, lsm);
2518                 GOTO(out, rc = -ENXIO);
2519         } else if (KEY_IS(KEY_LAST_ID)) {
2520                 struct obd_id_info *info = val;
2521                 __u32 size = sizeof(obd_id);
2522                 struct lov_tgt_desc *tgt;
2523
2524                 LASSERT(*vallen == sizeof(struct obd_id_info));
2525                 tgt = lov->lov_tgts[info->idx];
2526
2527                 if (!tgt || !tgt->ltd_active)
2528                         GOTO(out, rc = -ESRCH);
2529
2530                 rc = obd_get_info(tgt->ltd_exp, keylen, key, &size, info->data, NULL);
2531                 GOTO(out, rc = 0);
2532         } else if (KEY_IS(KEY_LOVDESC)) {
2533                 struct lov_desc *desc_ret = val;
2534                 *desc_ret = lov->desc;
2535
2536                 GOTO(out, rc = 0);
2537         } else if (KEY_IS(KEY_FIEMAP)) {
2538                 rc = lov_fiemap(lov, keylen, key, vallen, val, lsm);
2539                 GOTO(out, rc);
2540         }
2541
2542         rc = -EINVAL;
2543
2544 out:
2545         obd_putref(obddev);
2546         RETURN(rc);
2547 }
2548
2549 static int lov_set_info_async(struct obd_export *exp, obd_count keylen,
2550                               void *key, obd_count vallen, void *val,
2551                               struct ptlrpc_request_set *set)
2552 {
2553         struct obd_device *obddev = class_exp2obd(exp);
2554         struct lov_obd *lov = &obddev->u.lov;
2555         obd_count count;
2556         int i, rc = 0, err;
2557         struct lov_tgt_desc *tgt;
2558         unsigned incr, check_uuid,
2559                  do_inactive, no_set;
2560         unsigned next_id = 0,  mds_con = 0, capa = 0;
2561         ENTRY;
2562
2563         incr = check_uuid = do_inactive = no_set = 0;
2564         if (set == NULL) {
2565                 no_set = 1;
2566                 set = ptlrpc_prep_set();
2567                 if (!set)
2568                         RETURN(-ENOMEM);
2569         }
2570
2571         obd_getref(obddev);
2572         count = lov->desc.ld_tgt_count;
2573
2574         if (KEY_IS(KEY_NEXT_ID)) {
2575                 count = vallen / sizeof(struct obd_id_info);
2576                 vallen = sizeof(obd_id);
2577                 incr = sizeof(struct obd_id_info);
2578                 do_inactive = 1;
2579                 next_id = 1;
2580         } else if (KEY_IS(KEY_CHECKSUM)) {
2581                 do_inactive = 1;
2582         } else if (KEY_IS(KEY_EVICT_BY_NID)) {
2583                 /* use defaults:  do_inactive = incr = 0; */
2584         } else if (KEY_IS(KEY_MDS_CONN)) {
2585                 mds_con = 1;
2586         } else if (KEY_IS(KEY_CAPA_KEY)) {
2587                 capa = 1;
2588         }
2589
2590         for (i = 0; i < count; i++, val = (char *)val + incr) {
2591                 if (next_id) {
2592                         tgt = lov->lov_tgts[((struct obd_id_info*)val)->idx];
2593                 } else {
2594                         tgt = lov->lov_tgts[i];
2595                 }
2596                 /* OST was disconnected */
2597                 if (!tgt || !tgt->ltd_exp)
2598                         continue;
2599
2600                 /* OST is inactive and we don't want inactive OSCs */
2601                 if (!tgt->ltd_active && !do_inactive)
2602                         continue;
2603
2604                 if (mds_con) {
2605                         struct mds_group_info *mgi;
2606
2607                         LASSERT(vallen == sizeof(*mgi));
2608                         mgi = (struct mds_group_info *)val;
2609
2610                         /* Only want a specific OSC */
2611                         if (mgi->uuid && !obd_uuid_equals(mgi->uuid,
2612                                                 &tgt->ltd_uuid))
2613                                 continue;
2614
2615                         err = obd_set_info_async(tgt->ltd_exp,
2616                                          keylen, key, sizeof(int),
2617                                          &mgi->group, set);
2618                 } else if (next_id) {
2619                         err = obd_set_info_async(tgt->ltd_exp,
2620                                          keylen, key, vallen,
2621                                          ((struct obd_id_info*)val)->data, set);
2622                 } else if (capa) {
2623                         struct mds_capa_info *info = (struct mds_capa_info*)val;
2624
2625                         LASSERT(vallen == sizeof(*info));
2626
2627                          /* Only want a specific OSC */
2628                         if (info->uuid &&
2629                             !obd_uuid_equals(info->uuid, &tgt->ltd_uuid))
2630                                 continue;
2631
2632                         err = obd_set_info_async(tgt->ltd_exp, keylen, key,
2633                                                  sizeof(*info->capa),
2634                                                  info->capa, set);
2635
2636                 } else {
2637                         /* Only want a specific OSC */
2638                         if (check_uuid &&
2639                             !obd_uuid_equals(val, &tgt->ltd_uuid))
2640                                 continue;
2641
2642                         err = obd_set_info_async(tgt->ltd_exp,
2643                                          keylen, key, vallen, val, set);
2644                 }
2645
2646                 if (!rc)
2647                         rc = err;
2648         }
2649
2650         obd_putref(obddev);
2651         if (no_set) {
2652                 err = ptlrpc_set_wait(set);
2653                 if (!rc)
2654                         rc = err;
2655                 ptlrpc_set_destroy(set);
2656         }
2657         RETURN(rc);
2658 }
2659
2660 int lov_test_and_clear_async_rc(struct lov_stripe_md *lsm)
2661 {
2662         int i, rc = 0;
2663         ENTRY;
2664
2665         for (i = 0; i < lsm->lsm_stripe_count; i++) {
2666                 struct lov_oinfo *loi = lsm->lsm_oinfo[i];
2667                 if (loi->loi_ar.ar_rc && !rc)
2668                         rc = loi->loi_ar.ar_rc;
2669                 loi->loi_ar.ar_rc = 0;
2670         }
2671         RETURN(rc);
2672 }
2673 EXPORT_SYMBOL(lov_test_and_clear_async_rc);
2674
2675
2676 static int lov_extent_calc(struct obd_export *exp, struct lov_stripe_md *lsm,
2677                            int cmd, __u64 *offset)
2678 {
2679         __u32 ssize = lsm->lsm_stripe_size;
2680         __u64 start;
2681
2682         start = *offset;
2683         do_div(start, ssize);
2684         start = start * ssize;
2685
2686         CDEBUG(D_DLMTRACE, "offset "LPU64", stripe %u, start "LPU64
2687                            ", end "LPU64"\n", *offset, ssize, start,
2688                            start + ssize - 1);
2689         if (cmd == OBD_CALC_STRIPE_END) {
2690                 *offset = start + ssize - 1;
2691         } else if (cmd == OBD_CALC_STRIPE_START) {
2692                 *offset = start;
2693         } else {
2694                 LBUG();
2695         }
2696
2697         RETURN(0);
2698 }
2699
2700 void lov_stripe_lock(struct lov_stripe_md *md)
2701 {
2702         LASSERT(md->lsm_lock_owner != cfs_curproc_pid());
2703         spin_lock(&md->lsm_lock);
2704         LASSERT(md->lsm_lock_owner == 0);
2705         md->lsm_lock_owner = cfs_curproc_pid();
2706 }
2707 EXPORT_SYMBOL(lov_stripe_lock);
2708
2709 void lov_stripe_unlock(struct lov_stripe_md *md)
2710 {
2711         LASSERT(md->lsm_lock_owner == cfs_curproc_pid());
2712         md->lsm_lock_owner = 0;
2713         spin_unlock(&md->lsm_lock);
2714 }
2715 EXPORT_SYMBOL(lov_stripe_unlock);
2716
2717
2718 struct obd_ops lov_obd_ops = {
2719         .o_owner               = THIS_MODULE,
2720         .o_setup               = lov_setup,
2721         .o_precleanup          = lov_precleanup,
2722         .o_cleanup             = lov_cleanup,
2723         //.o_process_config      = lov_process_config,
2724         .o_connect             = lov_connect,
2725         .o_disconnect          = lov_disconnect,
2726         .o_statfs              = lov_statfs,
2727         .o_statfs_async        = lov_statfs_async,
2728         .o_packmd              = lov_packmd,
2729         .o_unpackmd            = lov_unpackmd,
2730         .o_create              = lov_create,
2731         .o_destroy             = lov_destroy,
2732         .o_getattr             = lov_getattr,
2733         .o_getattr_async       = lov_getattr_async,
2734         .o_setattr             = lov_setattr,
2735         .o_setattr_async       = lov_setattr_async,
2736         .o_brw                 = lov_brw,
2737         .o_merge_lvb           = lov_merge_lvb,
2738         .o_adjust_kms          = lov_adjust_kms,
2739         .o_punch               = lov_punch,
2740         .o_sync                = lov_sync,
2741         .o_enqueue             = lov_enqueue,
2742         .o_change_cbdata       = lov_change_cbdata,
2743         .o_cancel              = lov_cancel,
2744         .o_cancel_unused       = lov_cancel_unused,
2745         .o_iocontrol           = lov_iocontrol,
2746         .o_get_info            = lov_get_info,
2747         .o_set_info_async      = lov_set_info_async,
2748         .o_extent_calc         = lov_extent_calc,
2749         .o_llog_init           = lov_llog_init,
2750         .o_llog_finish         = lov_llog_finish,
2751         .o_notify              = lov_notify,
2752         .o_pool_new            = lov_pool_new,
2753         .o_pool_rem            = lov_pool_remove,
2754         .o_pool_add            = lov_pool_add,
2755         .o_pool_del            = lov_pool_del,
2756         .o_getref              = lov_getref,
2757         .o_putref              = lov_putref,
2758 };
2759
2760 static quota_interface_t *quota_interface;
2761 extern quota_interface_t lov_quota_interface;
2762
2763 cfs_mem_cache_t *lov_oinfo_slab;
2764
2765 extern struct lu_kmem_descr lov_caches[];
2766
2767 int __init lov_init(void)
2768 {
2769         struct lprocfs_static_vars lvars = { 0 };
2770         int rc, rc2;
2771         ENTRY;
2772
2773         /* print an address of _any_ initialized kernel symbol from this
2774          * module, to allow debugging with gdb that doesn't support data
2775          * symbols from modules.*/
2776         CDEBUG(D_CONSOLE, "Lustre LOV module (%p).\n", &lov_caches);
2777
2778         rc = lu_kmem_init(lov_caches);
2779         if (rc)
2780                 return rc;
2781
2782         lov_oinfo_slab = cfs_mem_cache_create("lov_oinfo",
2783                                               sizeof(struct lov_oinfo),
2784                                               0, SLAB_HWCACHE_ALIGN);
2785         if (lov_oinfo_slab == NULL) {
2786                 lu_kmem_fini(lov_caches);
2787                 return -ENOMEM;
2788         }
2789         lprocfs_lov_init_vars(&lvars);
2790
2791         request_module("lquota");
2792         quota_interface = PORTAL_SYMBOL_GET(lov_quota_interface);
2793         init_obd_quota_ops(quota_interface, &lov_obd_ops);
2794
2795         rc = class_register_type(&lov_obd_ops, NULL, lvars.module_vars,
2796                                  LUSTRE_LOV_NAME, &lov_device_type);
2797
2798         if (rc) {
2799                 if (quota_interface)
2800                         PORTAL_SYMBOL_PUT(lov_quota_interface);
2801                 rc2 = cfs_mem_cache_destroy(lov_oinfo_slab);
2802                 LASSERT(rc2 == 0);
2803                 lu_kmem_fini(lov_caches);
2804         }
2805
2806         RETURN(rc);
2807 }
2808
2809 #ifdef __KERNEL__
2810 static void /*__exit*/ lov_exit(void)
2811 {
2812         int rc;
2813
2814         lu_device_type_fini(&lov_device_type);
2815         lu_kmem_fini(lov_caches);
2816
2817         if (quota_interface)
2818                 PORTAL_SYMBOL_PUT(lov_quota_interface);
2819
2820         class_unregister_type(LUSTRE_LOV_NAME);
2821         rc = cfs_mem_cache_destroy(lov_oinfo_slab);
2822         LASSERT(rc == 0);
2823 }
2824
2825 MODULE_AUTHOR("Sun Microsystems, Inc. <http://www.lustre.org/>");
2826 MODULE_DESCRIPTION("Lustre Logical Object Volume OBD driver");
2827 MODULE_LICENSE("GPL");
2828
2829 cfs_module(lov, LUSTRE_VERSION_STRING, lov_init, lov_exit);
2830 #endif