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 = lustre_hash_init("POOLS",
 807                                                     HASH_POOLS_CUR_BITS,
 808                                                     HASH_POOLS_MAX_BITS,
 809                                                     &pool_hash_operations, 0);
 810         CFS_INIT_LIST_HEAD(&lov->lov_pool_list);
 811         lov->lov_pool_count = 0;
 812         rc = lov_ost_pool_init(&lov->lov_packed, 0);
 813         if (rc)
 814                 RETURN(rc);
 815         rc = lov_ost_pool_init(&lov->lov_qos.lq_rr.lqr_pool, 0);
 816         if (rc) {
 817                 lov_ost_pool_free(&lov->lov_packed);
 818                 RETURN(rc);
 819         }
 820
 821         lprocfs_lov_init_vars(&lvars);
 822         lprocfs_obd_setup(obd, lvars.obd_vars);
 823 #ifdef LPROCFS
 824         {
 825                 int rc;
 826
 827                 rc = lprocfs_seq_create(obd->obd_proc_entry, "target_obd",
 828                                         0444, &lov_proc_target_fops, obd);
 829                 if (rc)
 830                         CWARN("Error adding the target_obd file\n");
 831         }
 832 #endif
 833         lov->lov_pool_proc_entry = lprocfs_register("pools",
 834                                                     obd->obd_proc_entry,
 835                                                     NULL, NULL);
 836
 837         RETURN(0);
 838 }
 839
 840 static int lov_precleanup(struct obd_device *obd, enum obd_cleanup_stage stage)
 841 {
 842         int rc = 0;
 843         struct lov_obd *lov = &obd->u.lov;
 844
 845         ENTRY;
 846
 847         switch (stage) {
 848         case OBD_CLEANUP_EARLY: {
 849                 int i;
 850                 for (i = 0; i < lov->desc.ld_tgt_count; i++) {
 851                         if (!lov->lov_tgts[i] || !lov->lov_tgts[i]->ltd_active)
 852                                 continue;
 853                         obd_precleanup(class_exp2obd(lov->lov_tgts[i]->ltd_exp),
 854                                        OBD_CLEANUP_EARLY);
 855                 }
 856                 break;
 857         }
 858         case OBD_CLEANUP_EXPORTS:
 859                 rc = obd_llog_finish(obd, 0);
 860                 if (rc != 0)
 861                         CERROR("failed to cleanup llogging subsystems\n");
 862                 break;
 863         }
 864         RETURN(rc);
 865 }
 866
 867 static int lov_cleanup(struct obd_device *obd)
 868 {
 869         struct lov_obd *lov = &obd->u.lov;
 870         struct list_head *pos, *tmp;
 871         struct pool_desc *pool;
 872
 873         list_for_each_safe(pos, tmp, &lov->lov_pool_list) {
 874                 pool = list_entry(pos, struct pool_desc, pool_list);
 875                 /* free pool structs */
 876                 CDEBUG(D_INFO, "delete pool %p\n", pool);
 877                 lov_pool_del(obd, pool->pool_name);
 878         }
 879         lustre_hash_exit(lov->lov_pools_hash_body);
 880         lov_ost_pool_free(&(lov->lov_qos.lq_rr.lqr_pool));
 881         lov_ost_pool_free(&lov->lov_packed);
 882
 883         if (lov->lov_tgts) {
 884                 int i;
 885                 obd_getref(obd);
 886                 for (i = 0; i < lov->desc.ld_tgt_count; i++) {
 887                         if (!lov->lov_tgts[i])
 888                                 continue;
 889
 890                         /* Inactive targets may never have connected */
 891                         if (lov->lov_tgts[i]->ltd_active ||
 892                             atomic_read(&lov->lov_refcount))
 893                             /* We should never get here - these
 894                                should have been removed in the
 895                              disconnect. */
 896                                 CERROR("lov tgt %d not cleaned!"
 897                                        " deathrow=%d, lovrc=%d\n",
 898                                        i, lov->lov_death_row,
 899                                        atomic_read(&lov->lov_refcount));
 900                         lov_del_target(obd, i, 0, 0);
 901                 }
 902                 obd_putref(obd);
 903                 OBD_FREE(lov->lov_tgts, sizeof(*lov->lov_tgts) *
 904                          lov->lov_tgt_size);
 905                 lov->lov_tgt_size = 0;
 906         }
 907
 908         /* clear pools parent proc entry only after all pools is killed */
 909         lprocfs_obd_cleanup(obd);
 910
 911         OBD_FREE_PTR(lov->lov_qos.lq_statfs_data);
 912         RETURN(0);
 913 }
 914
 915 int lov_process_config_base(struct obd_device *obd, struct lustre_cfg *lcfg,
 916                             __u32 *indexp, int *genp)
 917 {
 918         struct obd_uuid obd_uuid;
 919         int cmd;
 920         int rc = 0;
 921         ENTRY;
 922
 923         switch(cmd = lcfg->lcfg_command) {
 924         case LCFG_LOV_ADD_OBD:
 925         case LCFG_LOV_ADD_INA:
 926         case LCFG_LOV_DEL_OBD: {
 927                 __u32 index;
 928                 int gen;
 929                 /* lov_modify_tgts add  0:lov_mdsA  1:ost1_UUID  2:0  3:1 */
 930                 if (LUSTRE_CFG_BUFLEN(lcfg, 1) > sizeof(obd_uuid.uuid))
 931                         GOTO(out, rc = -EINVAL);
 932
 933                 obd_str2uuid(&obd_uuid,  lustre_cfg_buf(lcfg, 1));
 934
 935                 if (sscanf(lustre_cfg_buf(lcfg, 2), "%d", indexp) != 1)
 936                         GOTO(out, rc = -EINVAL);
 937                 if (sscanf(lustre_cfg_buf(lcfg, 3), "%d", genp) != 1)
 938                         GOTO(out, rc = -EINVAL);
 939                 index = *indexp;
 940                 gen = *genp;
 941                 if (cmd == LCFG_LOV_ADD_OBD)
 942                         rc = lov_add_target(obd, &obd_uuid, index, gen, 1);
 943                 else if (cmd == LCFG_LOV_ADD_INA)
 944                         rc = lov_add_target(obd, &obd_uuid, index, gen, 0);
 945                 else
 946                         rc = lov_del_target(obd, index, &obd_uuid, gen);
 947                 GOTO(out, rc);
 948         }
 949         case LCFG_PARAM: {
 950                 struct lprocfs_static_vars lvars = { 0 };
 951                 struct lov_desc *desc = &(obd->u.lov.desc);
 952
 953                 if (!desc)
 954                         GOTO(out, rc = -EINVAL);
 955
 956                 lprocfs_lov_init_vars(&lvars);
 957
 958                 rc = class_process_proc_param(PARAM_LOV, lvars.obd_vars,
 959                                               lcfg, obd);
 960                 if (rc > 0)
 961                         rc = 0;
 962                 GOTO(out, rc);
 963         }
 964         case LCFG_POOL_NEW:
 965         case LCFG_POOL_ADD:
 966         case LCFG_POOL_DEL:
 967         case LCFG_POOL_REM:
 968                 GOTO(out, rc);
 969
 970         default: {
 971                 CERROR("Unknown command: %d\n", lcfg->lcfg_command);
 972                 GOTO(out, rc = -EINVAL);
 973
 974         }
 975         }
 976 out:
 977         RETURN(rc);
 978 }
 979
 980 #ifndef log2
 981 #define log2(n) ffz(~(n))
 982 #endif
 983
 984 static int lov_clear_orphans(struct obd_export *export, struct obdo *src_oa,
 985                              struct lov_stripe_md **ea,
 986                              struct obd_trans_info *oti)
 987 {
 988         struct lov_obd *lov;
 989         struct obdo *tmp_oa;
 990         struct obd_uuid *ost_uuid = NULL;
 991         int rc = 0, i;
 992         ENTRY;
 993
 994         LASSERT(src_oa->o_valid & OBD_MD_FLFLAGS &&
 995                 src_oa->o_flags == OBD_FL_DELORPHAN);
 996
 997         lov = &export->exp_obd->u.lov;
 998
 999         OBDO_ALLOC(tmp_oa);
1000         if (tmp_oa == NULL)
1001                 RETURN(-ENOMEM);
1002
1003         if (oti->oti_ost_uuid) {
1004                 ost_uuid = oti->oti_ost_uuid;
1005                 CDEBUG(D_HA, "clearing orphans only for %s\n",
1006                        ost_uuid->uuid);
1007         }
1008
1009         obd_getref(export->exp_obd);
1010         for (i = 0; i < lov->desc.ld_tgt_count; i++) {
1011                 struct lov_stripe_md obj_md;
1012                 struct lov_stripe_md *obj_mdp = &obj_md;
1013                 struct lov_tgt_desc *tgt;
1014                 int err;
1015
1016                 tgt = lov->lov_tgts[i];
1017                 if (!tgt)
1018                         continue;
1019
1020                 /* if called for a specific target, we don't
1021                    care if it is not active. */
1022                 if (!lov->lov_tgts[i]->ltd_active && ost_uuid == NULL) {
1023                         CDEBUG(D_HA, "lov idx %d inactive\n", i);
1024                         continue;
1025                 }
1026
1027                 if (ost_uuid && !obd_uuid_equals(ost_uuid, &tgt->ltd_uuid))
1028                         continue;
1029
1030                 CDEBUG(D_CONFIG,"Clear orphans for %d:%s\n", i,
1031                        obd_uuid2str(ost_uuid));
1032
1033                 memcpy(tmp_oa, src_oa, sizeof(*tmp_oa));
1034
1035                 LASSERT(lov->lov_tgts[i]->ltd_exp);
1036                 /* XXX: LOV STACKING: use real "obj_mdp" sub-data */
1037                 err = obd_create(lov->lov_tgts[i]->ltd_exp,
1038                                  tmp_oa, &obj_mdp, oti);
1039                 if (err) {
1040                         /* This export will be disabled until it is recovered,
1041                            and then orphan recovery will be completed. */
1042                         CERROR("error in orphan recovery on OST idx %d/%d: "
1043                                "rc = %d\n", i, lov->desc.ld_tgt_count, err);
1044                         rc = err;
1045                 }
1046
1047                 if (ost_uuid)
1048                         break;
1049         }
1050         obd_putref(export->exp_obd);
1051
1052         OBDO_FREE(tmp_oa);
1053         RETURN(rc);
1054 }
1055
1056 static int lov_recreate(struct obd_export *exp, struct obdo *src_oa,
1057                         struct lov_stripe_md **ea, struct obd_trans_info *oti)
1058 {
1059         struct lov_stripe_md *obj_mdp, *lsm;
1060         struct lov_obd *lov = &exp->exp_obd->u.lov;
1061         unsigned ost_idx;
1062         int rc, i;
1063         ENTRY;
1064
1065         LASSERT(src_oa->o_valid & OBD_MD_FLFLAGS &&
1066                 src_oa->o_flags & OBD_FL_RECREATE_OBJS);
1067
1068         OBD_ALLOC(obj_mdp, sizeof(*obj_mdp));
1069         if (obj_mdp == NULL)
1070                 RETURN(-ENOMEM);
1071
1072         ost_idx = src_oa->o_nlink;
1073         lsm = *ea;
1074         if (lsm == NULL)
1075                 GOTO(out, rc = -EINVAL);
1076         if (ost_idx >= lov->desc.ld_tgt_count ||
1077             !lov->lov_tgts[ost_idx])
1078                 GOTO(out, rc = -EINVAL);
1079
1080         for (i = 0; i < lsm->lsm_stripe_count; i++) {
1081                 if (lsm->lsm_oinfo[i]->loi_ost_idx == ost_idx) {
1082                         if (lsm->lsm_oinfo[i]->loi_id != src_oa->o_id)
1083                                 GOTO(out, rc = -EINVAL);
1084                         break;
1085                 }
1086         }
1087         if (i == lsm->lsm_stripe_count)
1088                 GOTO(out, rc = -EINVAL);
1089
1090         rc = obd_create(lov->lov_tgts[ost_idx]->ltd_exp, src_oa, &obj_mdp, oti);
1091 out:
1092         OBD_FREE(obj_mdp, sizeof(*obj_mdp));
1093         RETURN(rc);
1094 }
1095
1096 /* the LOV expects oa->o_id to be set to the LOV object id */
1097 static int lov_create(struct obd_export *exp, struct obdo *src_oa,
1098                       struct lov_stripe_md **ea, struct obd_trans_info *oti)
1099 {
1100         struct lov_obd *lov;
1101         struct obd_info oinfo;
1102         struct lov_request_set *set = NULL;
1103         struct lov_request *req;
1104         struct l_wait_info  lwi = { 0 };
1105         int rc = 0;
1106         ENTRY;
1107
1108         LASSERT(ea != NULL);
1109         if (exp == NULL)
1110                 RETURN(-EINVAL);
1111
1112         if ((src_oa->o_valid & OBD_MD_FLFLAGS) &&
1113             src_oa->o_flags == OBD_FL_DELORPHAN) {
1114                 rc = lov_clear_orphans(exp, src_oa, ea, oti);
1115                 RETURN(rc);
1116         }
1117
1118         lov = &exp->exp_obd->u.lov;
1119         if (!lov->desc.ld_active_tgt_count)
1120                 RETURN(-EIO);
1121
1122         obd_getref(exp->exp_obd);
1123         /* Recreate a specific object id at the given OST index */
1124         if ((src_oa->o_valid & OBD_MD_FLFLAGS) &&
1125             (src_oa->o_flags & OBD_FL_RECREATE_OBJS)) {
1126                  rc = lov_recreate(exp, src_oa, ea, oti);
1127                  GOTO(out, rc);
1128         }
1129
1130         /* issue statfs rpcs if the osfs data is older than qos_maxage - 1s,
1131          * later in alloc_qos(), we will wait for those rpcs to complete if
1132          * the osfs age is older than 2 * qos_maxage */
1133         qos_statfs_update(exp->exp_obd,
1134                           cfs_time_shift_64(-lov->desc.ld_qos_maxage) + HZ, 0);
1135
1136         rc = lov_prep_create_set(exp, &oinfo, ea, src_oa, oti, &set);
1137         if (rc)
1138                 GOTO(out, rc);
1139
1140         list_for_each_entry(req, &set->set_list, rq_link) {
1141                 /* XXX: LOV STACKING: use real "obj_mdp" sub-data */
1142                 rc = obd_create_async(lov->lov_tgts[req->rq_idx]->ltd_exp,
1143                                       &req->rq_oi, &req->rq_oi.oi_md, oti);
1144         }
1145
1146         /* osc_create have timeout equ obd_timeout/2 so waiting don't be
1147          * longer then this */
1148         l_wait_event(set->set_waitq, lov_finished_set(set), &lwi);
1149
1150         /* we not have ptlrpc set for assign set->interpret and should
1151          * be call interpret function himself. calling from cb_create_update
1152          * not permited because lov_fini_create_set can sleep for long time,
1153          * but we must avoid sleeping in ptlrpcd interpret function. */
1154         rc = lov_fini_create_set(set, ea);
1155 out:
1156         obd_putref(exp->exp_obd);
1157         RETURN(rc);
1158 }
1159
1160 #define ASSERT_LSM_MAGIC(lsmp)                                                  \
1161 do {                                                                            \
1162         LASSERT((lsmp) != NULL);                                                \
1163         LASSERTF(((lsmp)->lsm_magic == LOV_MAGIC_V1 ||                          \
1164                  (lsmp)->lsm_magic == LOV_MAGIC_V3),                            \
1165                  "%p->lsm_magic=%x\n", (lsmp), (lsmp)->lsm_magic);              \
1166 } while (0)
1167
1168 static int lov_destroy(struct obd_export *exp, struct obdo *oa,
1169                        struct lov_stripe_md *lsm, struct obd_trans_info *oti,
1170                        struct obd_export *md_exp, void *capa)
1171 {
1172         struct lov_request_set *set;
1173         struct obd_info oinfo;
1174         struct lov_request *req;
1175         struct list_head *pos;
1176         struct lov_obd *lov;
1177         int rc = 0, err = 0;
1178         ENTRY;
1179
1180         ASSERT_LSM_MAGIC(lsm);
1181
1182         if (!exp || !exp->exp_obd)
1183                 RETURN(-ENODEV);
1184
1185         if (oa->o_valid & OBD_MD_FLCOOKIE) {
1186                 LASSERT(oti);
1187                 LASSERT(oti->oti_logcookies);
1188         }
1189
1190         lov = &exp->exp_obd->u.lov;
1191         obd_getref(exp->exp_obd);
1192         rc = lov_prep_destroy_set(exp, &oinfo, oa, lsm, oti, &set);
1193         if (rc)
1194                 GOTO(out, rc);
1195
1196         list_for_each (pos, &set->set_list) {
1197                 req = list_entry(pos, struct lov_request, rq_link);
1198
1199                 if (oa->o_valid & OBD_MD_FLCOOKIE)
1200                         oti->oti_logcookies = set->set_cookies + req->rq_stripe;
1201
1202                 err = obd_destroy(lov->lov_tgts[req->rq_idx]->ltd_exp,
1203                                   req->rq_oi.oi_oa, NULL, oti, NULL, capa);
1204                 err = lov_update_common_set(set, req, err);
1205                 if (err) {
1206                         CERROR("error: destroying objid "LPX64" subobj "
1207                                LPX64" on OST idx %d: rc = %d\n",
1208                                oa->o_id, req->rq_oi.oi_oa->o_id,
1209                                req->rq_idx, err);
1210                         if (!rc)
1211                                 rc = err;
1212                 }
1213         }
1214
1215         if (rc == 0) {
1216                 LASSERT(lsm_op_find(lsm->lsm_magic) != NULL);
1217                 rc = lsm_op_find(lsm->lsm_magic)->lsm_destroy(lsm, oa, md_exp);
1218         }
1219         err = lov_fini_destroy_set(set);
1220 out:
1221         obd_putref(exp->exp_obd);
1222         RETURN(rc ? rc : err);
1223 }
1224
1225 static int lov_getattr(struct obd_export *exp, struct obd_info *oinfo)
1226 {
1227         struct lov_request_set *set;
1228         struct lov_request *req;
1229         struct list_head *pos;
1230         struct lov_obd *lov;
1231         int err = 0, rc = 0;
1232         ENTRY;
1233
1234         LASSERT(oinfo);
1235         ASSERT_LSM_MAGIC(oinfo->oi_md);
1236
1237         if (!exp || !exp->exp_obd)
1238                 RETURN(-ENODEV);
1239
1240         lov = &exp->exp_obd->u.lov;
1241
1242         rc = lov_prep_getattr_set(exp, oinfo, &set);
1243         if (rc)
1244                 RETURN(rc);
1245
1246         list_for_each (pos, &set->set_list) {
1247                 req = list_entry(pos, struct lov_request, rq_link);
1248
1249                 CDEBUG(D_INFO, "objid "LPX64"[%d] has subobj "LPX64" at idx "
1250                        "%u\n", oinfo->oi_oa->o_id, req->rq_stripe,
1251                        req->rq_oi.oi_oa->o_id, req->rq_idx);
1252
1253                 rc = obd_getattr(lov->lov_tgts[req->rq_idx]->ltd_exp,
1254                                  &req->rq_oi);
1255                 err = lov_update_common_set(set, req, rc);
1256                 if (err) {
1257                         CERROR("error: getattr objid "LPX64" subobj "
1258                                LPX64" on OST idx %d: rc = %d\n",
1259                                oinfo->oi_oa->o_id, req->rq_oi.oi_oa->o_id,
1260                                req->rq_idx, err);
1261                         break;
1262                 }
1263         }
1264
1265         rc = lov_fini_getattr_set(set);
1266         if (err)
1267                 rc = err;
1268         RETURN(rc);
1269 }
1270
1271 static int lov_getattr_interpret(struct ptlrpc_request_set *rqset,
1272                                  void *data, int rc)
1273 {
1274         struct lov_request_set *lovset = (struct lov_request_set *)data;
1275         int err;
1276         ENTRY;
1277
1278         /* don't do attribute merge if this aysnc op failed */
1279         if (rc)
1280                 lovset->set_completes = 0;
1281         err = lov_fini_getattr_set(lovset);
1282         RETURN(rc ? rc : err);
1283 }
1284
1285 static int lov_getattr_async(struct obd_export *exp, struct obd_info *oinfo,
1286                               struct ptlrpc_request_set *rqset)
1287 {
1288         struct lov_request_set *lovset;
1289         struct lov_obd *lov;
1290         struct list_head *pos;
1291         struct lov_request *req;
1292         int rc = 0, err;
1293         ENTRY;
1294
1295         LASSERT(oinfo);
1296         ASSERT_LSM_MAGIC(oinfo->oi_md);
1297
1298         if (!exp || !exp->exp_obd)
1299                 RETURN(-ENODEV);
1300
1301         lov = &exp->exp_obd->u.lov;
1302
1303         rc = lov_prep_getattr_set(exp, oinfo, &lovset);
1304         if (rc)
1305                 RETURN(rc);
1306
1307         CDEBUG(D_INFO, "objid "LPX64": %ux%u byte stripes\n",
1308                oinfo->oi_md->lsm_object_id, oinfo->oi_md->lsm_stripe_count,
1309                oinfo->oi_md->lsm_stripe_size);
1310
1311         list_for_each (pos, &lovset->set_list) {
1312                 req = list_entry(pos, struct lov_request, rq_link);
1313
1314                 CDEBUG(D_INFO, "objid "LPX64"[%d] has subobj "LPX64" at idx "
1315                        "%u\n", oinfo->oi_oa->o_id, req->rq_stripe,
1316                        req->rq_oi.oi_oa->o_id, req->rq_idx);
1317                 rc = obd_getattr_async(lov->lov_tgts[req->rq_idx]->ltd_exp,
1318                                        &req->rq_oi, rqset);
1319                 if (rc) {
1320                         CERROR("error: getattr objid "LPX64" subobj "
1321                                LPX64" on OST idx %d: rc = %d\n",
1322                                oinfo->oi_oa->o_id, req->rq_oi.oi_oa->o_id,
1323                                req->rq_idx, rc);
1324                         GOTO(out, rc);
1325                 }
1326         }
1327
1328         if (!list_empty(&rqset->set_requests)) {
1329                 LASSERT(rc == 0);
1330                 LASSERT (rqset->set_interpret == NULL);
1331                 rqset->set_interpret = lov_getattr_interpret;
1332                 rqset->set_arg = (void *)lovset;
1333                 RETURN(rc);
1334         }
1335 out:
1336         if (rc)
1337                 lovset->set_completes = 0;
1338         err = lov_fini_getattr_set(lovset);
1339         RETURN(rc ? rc : err);
1340 }
1341
1342 static int lov_setattr(struct obd_export *exp, struct obd_info *oinfo,
1343                        struct obd_trans_info *oti)
1344 {
1345         struct lov_request_set *set;
1346         struct lov_obd *lov;
1347         struct list_head *pos;
1348         struct lov_request *req;
1349         int err = 0, rc = 0;
1350         ENTRY;
1351
1352         LASSERT(oinfo);
1353         ASSERT_LSM_MAGIC(oinfo->oi_md);
1354
1355         if (!exp || !exp->exp_obd)
1356                 RETURN(-ENODEV);
1357
1358         /* for now, we only expect the following updates here */
1359         LASSERT(!(oinfo->oi_oa->o_valid & ~(OBD_MD_FLID | OBD_MD_FLTYPE |
1360                                             OBD_MD_FLMODE | OBD_MD_FLATIME |
1361                                             OBD_MD_FLMTIME | OBD_MD_FLCTIME |
1362                                             OBD_MD_FLFLAGS | OBD_MD_FLSIZE |
1363                                             OBD_MD_FLGROUP | OBD_MD_FLUID |
1364                                             OBD_MD_FLGID | OBD_MD_FLFID |
1365                                             OBD_MD_FLGENER)));
1366         lov = &exp->exp_obd->u.lov;
1367         rc = lov_prep_setattr_set(exp, oinfo, oti, &set);
1368         if (rc)
1369                 RETURN(rc);
1370
1371         list_for_each (pos, &set->set_list) {
1372                 req = list_entry(pos, struct lov_request, rq_link);
1373
1374                 rc = obd_setattr(lov->lov_tgts[req->rq_idx]->ltd_exp,
1375                                  &req->rq_oi, NULL);
1376                 err = lov_update_setattr_set(set, req, rc);
1377                 if (err) {
1378                         CERROR("error: setattr objid "LPX64" subobj "
1379                                LPX64" on OST idx %d: rc = %d\n",
1380                                set->set_oi->oi_oa->o_id,
1381                                req->rq_oi.oi_oa->o_id, req->rq_idx, err);
1382                         if (!rc)
1383                                 rc = err;
1384                 }
1385         }
1386         err = lov_fini_setattr_set(set);
1387         if (!rc)
1388                 rc = err;
1389         RETURN(rc);
1390 }
1391
1392 static int lov_setattr_interpret(struct ptlrpc_request_set *rqset,
1393                                  void *data, int rc)
1394 {
1395         struct lov_request_set *lovset = (struct lov_request_set *)data;
1396         int err;
1397         ENTRY;
1398
1399         if (rc)
1400                 lovset->set_completes = 0;
1401         err = lov_fini_setattr_set(lovset);
1402         RETURN(rc ? rc : err);
1403 }
1404
1405 /* If @oti is given, the request goes from MDS and responses from OSTs are not
1406    needed. Otherwise, a client is waiting for responses. */
1407 static int lov_setattr_async(struct obd_export *exp, struct obd_info *oinfo,
1408                              struct obd_trans_info *oti,
1409                              struct ptlrpc_request_set *rqset)
1410 {
1411         struct lov_request_set *set;
1412         struct lov_request *req;
1413         struct list_head *pos;
1414         struct lov_obd *lov;
1415         int rc = 0;
1416         ENTRY;
1417
1418         LASSERT(oinfo);
1419         ASSERT_LSM_MAGIC(oinfo->oi_md);
1420         if (oinfo->oi_oa->o_valid & OBD_MD_FLCOOKIE) {
1421                 LASSERT(oti);
1422                 LASSERT(oti->oti_logcookies);
1423         }
1424
1425         if (!exp || !exp->exp_obd)
1426                 RETURN(-ENODEV);
1427
1428         lov = &exp->exp_obd->u.lov;
1429         rc = lov_prep_setattr_set(exp, oinfo, oti, &set);
1430         if (rc)
1431                 RETURN(rc);
1432
1433         CDEBUG(D_INFO, "objid "LPX64": %ux%u byte stripes\n",
1434                oinfo->oi_md->lsm_object_id, oinfo->oi_md->lsm_stripe_count,
1435                oinfo->oi_md->lsm_stripe_size);
1436
1437         list_for_each (pos, &set->set_list) {
1438                 req = list_entry(pos, struct lov_request, rq_link);
1439
1440                 if (oinfo->oi_oa->o_valid & OBD_MD_FLCOOKIE)
1441                         oti->oti_logcookies = set->set_cookies + req->rq_stripe;
1442
1443                 CDEBUG(D_INFO, "objid "LPX64"[%d] has subobj "LPX64" at idx "
1444                        "%u\n", oinfo->oi_oa->o_id, req->rq_stripe,
1445                        req->rq_oi.oi_oa->o_id, req->rq_idx);
1446
1447                 rc = obd_setattr_async(lov->lov_tgts[req->rq_idx]->ltd_exp,
1448                                        &req->rq_oi, oti, rqset);
1449                 if (rc) {
1450                         CERROR("error: setattr objid "LPX64" subobj "
1451                                LPX64" on OST idx %d: rc = %d\n",
1452                                set->set_oi->oi_oa->o_id,
1453                                req->rq_oi.oi_oa->o_id,
1454                                req->rq_idx, rc);
1455                         break;
1456                 }
1457         }
1458
1459         /* If we are not waiting for responses on async requests, return. */
1460         if (rc || !rqset || list_empty(&rqset->set_requests)) {
1461                 int err;
1462                 if (rc)
1463                         set->set_completes = 0;
1464                 err = lov_fini_setattr_set(set);
1465                 RETURN(rc ? rc : err);
1466         }
1467
1468         LASSERT(rqset->set_interpret == NULL);
1469         rqset->set_interpret = lov_setattr_interpret;
1470         rqset->set_arg = (void *)set;
1471
1472         RETURN(0);
1473 }
1474
1475 static int lov_punch_interpret(struct ptlrpc_request_set *rqset,
1476                                void *data, int rc)
1477 {
1478         struct lov_request_set *lovset = (struct lov_request_set *)data;
1479         int err;
1480         ENTRY;
1481
1482         if (rc)
1483                 lovset->set_completes = 0;
1484         err = lov_fini_punch_set(lovset);
1485         RETURN(rc ? rc : err);
1486 }
1487
1488 /* FIXME: maybe we'll just make one node the authoritative attribute node, then
1489  * we can send this 'punch' to just the authoritative node and the nodes
1490  * that the punch will affect. */
1491 static int lov_punch(struct obd_export *exp, struct obd_info *oinfo,
1492                      struct obd_trans_info *oti,
1493                      struct ptlrpc_request_set *rqset)
1494 {
1495         struct lov_request_set *set;
1496         struct lov_obd *lov;
1497         struct list_head *pos;
1498         struct lov_request *req;
1499         int rc = 0;
1500         ENTRY;
1501
1502         LASSERT(oinfo);
1503         ASSERT_LSM_MAGIC(oinfo->oi_md);
1504
1505         if (!exp || !exp->exp_obd)
1506                 RETURN(-ENODEV);
1507
1508         lov = &exp->exp_obd->u.lov;
1509         rc = lov_prep_punch_set(exp, oinfo, oti, &set);
1510         if (rc)
1511                 RETURN(rc);
1512
1513         list_for_each (pos, &set->set_list) {
1514                 req = list_entry(pos, struct lov_request, rq_link);
1515
1516                 rc = obd_punch(lov->lov_tgts[req->rq_idx]->ltd_exp,
1517                                &req->rq_oi, NULL, rqset);
1518                 if (rc) {
1519                         CERROR("error: punch objid "LPX64" subobj "LPX64
1520                                " on OST idx %d: rc = %d\n",
1521                                set->set_oi->oi_oa->o_id,
1522                                req->rq_oi.oi_oa->o_id, req->rq_idx, rc);
1523                         break;
1524                 }
1525         }
1526
1527         if (rc || list_empty(&rqset->set_requests)) {
1528                 int err;
1529                 err = lov_fini_punch_set(set);
1530                 RETURN(rc ? rc : err);
1531         }
1532
1533         LASSERT(rqset->set_interpret == NULL);
1534         rqset->set_interpret = lov_punch_interpret;
1535         rqset->set_arg = (void *)set;
1536
1537         RETURN(0);
1538 }
1539
1540 static int lov_sync(struct obd_export *exp, struct obdo *oa,
1541                     struct lov_stripe_md *lsm, obd_off start, obd_off end,
1542                     void *capa)
1543 {
1544         struct lov_request_set *set;
1545         struct obd_info oinfo;
1546         struct lov_obd *lov;
1547         struct list_head *pos;
1548         struct lov_request *req;
1549         int err = 0, rc = 0;
1550         ENTRY;
1551
1552         ASSERT_LSM_MAGIC(lsm);
1553
1554         if (!exp->exp_obd)
1555                 RETURN(-ENODEV);
1556
1557         lov = &exp->exp_obd->u.lov;
1558         rc = lov_prep_sync_set(exp, &oinfo, oa, lsm, start, end, &set);
1559         if (rc)
1560                 RETURN(rc);
1561
1562         list_for_each (pos, &set->set_list) {
1563                 req = list_entry(pos, struct lov_request, rq_link);
1564
1565                 rc = obd_sync(lov->lov_tgts[req->rq_idx]->ltd_exp,
1566                               req->rq_oi.oi_oa, NULL,
1567                               req->rq_oi.oi_policy.l_extent.start,
1568                               req->rq_oi.oi_policy.l_extent.end, capa);
1569                 err = lov_update_common_set(set, req, rc);
1570                 if (err) {
1571                         CERROR("error: fsync objid "LPX64" subobj "LPX64
1572                                " on OST idx %d: rc = %d\n",
1573                                set->set_oi->oi_oa->o_id,
1574                                req->rq_oi.oi_oa->o_id, req->rq_idx, rc);
1575                         if (!rc)
1576                                 rc = err;
1577                 }
1578         }
1579         err = lov_fini_sync_set(set);
1580         if (!rc)
1581                 rc = err;
1582         RETURN(rc);
1583 }
1584
1585 static int lov_brw_check(struct lov_obd *lov, struct obd_info *lov_oinfo,
1586                          obd_count oa_bufs, struct brw_page *pga)
1587 {
1588         struct obd_info oinfo = { { { 0 } } };
1589         int i, rc = 0;
1590
1591         oinfo.oi_oa = lov_oinfo->oi_oa;
1592
1593         /* The caller just wants to know if there's a chance that this
1594          * I/O can succeed */
1595         for (i = 0; i < oa_bufs; i++) {
1596                 int stripe = lov_stripe_number(lov_oinfo->oi_md, pga[i].off);
1597                 int ost = lov_oinfo->oi_md->lsm_oinfo[stripe]->loi_ost_idx;
1598                 obd_off start, end;
1599
1600                 if (!lov_stripe_intersects(lov_oinfo->oi_md, i, pga[i].off,
1601                                            pga[i].off + pga[i].count - 1,
1602                                            &start, &end))
1603                         continue;
1604
1605                 if (!lov->lov_tgts[ost] || !lov->lov_tgts[ost]->ltd_active) {
1606                         CDEBUG(D_HA, "lov idx %d inactive\n", ost);
1607                         return -EIO;
1608                 }
1609
1610                 rc = obd_brw(OBD_BRW_CHECK, lov->lov_tgts[ost]->ltd_exp, &oinfo,
1611                              1, &pga[i], NULL);
1612                 if (rc)
1613                         break;
1614         }
1615         return rc;
1616 }
1617
1618 static int lov_brw(int cmd, struct obd_export *exp, struct obd_info *oinfo,
1619                    obd_count oa_bufs, struct brw_page *pga,
1620                    struct obd_trans_info *oti)
1621 {
1622         struct lov_request_set *set;
1623         struct lov_request *req;
1624         struct list_head *pos;
1625         struct lov_obd *lov = &exp->exp_obd->u.lov;
1626         int err, rc = 0;
1627         ENTRY;
1628
1629         ASSERT_LSM_MAGIC(oinfo->oi_md);
1630
1631         if (cmd == OBD_BRW_CHECK) {
1632                 rc = lov_brw_check(lov, oinfo, oa_bufs, pga);
1633                 RETURN(rc);
1634         }
1635
1636         rc = lov_prep_brw_set(exp, oinfo, oa_bufs, pga, oti, &set);
1637         if (rc)
1638                 RETURN(rc);
1639
1640         list_for_each (pos, &set->set_list) {
1641                 struct obd_export *sub_exp;
1642                 struct brw_page *sub_pga;
1643                 req = list_entry(pos, struct lov_request, rq_link);
1644
1645                 sub_exp = lov->lov_tgts[req->rq_idx]->ltd_exp;
1646                 sub_pga = set->set_pga + req->rq_pgaidx;
1647                 rc = obd_brw(cmd, sub_exp, &req->rq_oi, req->rq_oabufs,
1648                              sub_pga, oti);
1649                 if (rc)
1650                         break;
1651                 lov_update_common_set(set, req, rc);
1652         }
1653
1654         err = lov_fini_brw_set(set);
1655         if (!rc)
1656                 rc = err;
1657         RETURN(rc);
1658 }
1659
1660 static int lov_enqueue_interpret(struct ptlrpc_request_set *rqset,
1661                                  void *data, int rc)
1662 {
1663         struct lov_request_set *lovset = (struct lov_request_set *)data;
1664         ENTRY;
1665         rc = lov_fini_enqueue_set(lovset, lovset->set_ei->ei_mode, rc, rqset);
1666         RETURN(rc);
1667 }
1668
1669 static int lov_enqueue(struct obd_export *exp, struct obd_info *oinfo,
1670                        struct ldlm_enqueue_info *einfo,
1671                        struct ptlrpc_request_set *rqset)
1672 {
1673         ldlm_mode_t mode = einfo->ei_mode;
1674         struct lov_request_set *set;
1675         struct lov_request *req;
1676         struct list_head *pos;
1677         struct lov_obd *lov;
1678         ldlm_error_t rc;
1679         ENTRY;
1680
1681         LASSERT(oinfo);
1682         ASSERT_LSM_MAGIC(oinfo->oi_md);
1683         LASSERT(mode == (mode & -mode));
1684
1685         /* we should never be asked to replay a lock this way. */
1686         LASSERT((oinfo->oi_flags & LDLM_FL_REPLAY) == 0);
1687
1688         if (!exp || !exp->exp_obd)
1689                 RETURN(-ENODEV);
1690
1691         lov = &exp->exp_obd->u.lov;
1692         rc = lov_prep_enqueue_set(exp, oinfo, einfo, &set);
1693         if (rc)
1694                 RETURN(rc);
1695
1696         list_for_each (pos, &set->set_list) {
1697                 req = list_entry(pos, struct lov_request, rq_link);
1698
1699                 rc = obd_enqueue(lov->lov_tgts[req->rq_idx]->ltd_exp,
1700                                  &req->rq_oi, einfo, rqset);
1701                 if (rc != ELDLM_OK)
1702                         GOTO(out, rc);
1703         }
1704
1705         if (rqset && !list_empty(&rqset->set_requests)) {
1706                 LASSERT(rc == 0);
1707                 LASSERT(rqset->set_interpret == NULL);
1708                 rqset->set_interpret = lov_enqueue_interpret;
1709                 rqset->set_arg = (void *)set;
1710                 RETURN(rc);
1711         }
1712 out:
1713         rc = lov_fini_enqueue_set(set, mode, rc, rqset);
1714         RETURN(rc);
1715 }
1716
1717 static int lov_change_cbdata(struct obd_export *exp,
1718                              struct lov_stripe_md *lsm, ldlm_iterator_t it,
1719                              void *data)
1720 {
1721         struct lov_obd *lov;
1722         int rc = 0, i;
1723         ENTRY;
1724
1725         ASSERT_LSM_MAGIC(lsm);
1726
1727         if (!exp || !exp->exp_obd)
1728                 RETURN(-ENODEV);
1729
1730         LASSERT_MDS_GROUP(lsm->lsm_object_gr);
1731
1732         lov = &exp->exp_obd->u.lov;
1733         for (i = 0; i < lsm->lsm_stripe_count; i++) {
1734                 struct lov_stripe_md submd;
1735                 struct lov_oinfo *loi = lsm->lsm_oinfo[i];
1736
1737                 if (!lov->lov_tgts[loi->loi_ost_idx]) {
1738                         CDEBUG(D_HA, "lov idx %d NULL \n", loi->loi_ost_idx);
1739                         continue;
1740                 }
1741
1742                 submd.lsm_object_id = loi->loi_id;
1743                 submd.lsm_object_gr = lsm->lsm_object_gr;
1744                 submd.lsm_stripe_count = 0;
1745                 rc = obd_change_cbdata(lov->lov_tgts[loi->loi_ost_idx]->ltd_exp,
1746                                        &submd, it, data);
1747         }
1748         RETURN(rc);
1749 }
1750
1751 static int lov_cancel(struct obd_export *exp, struct lov_stripe_md *lsm,
1752                       __u32 mode, struct lustre_handle *lockh)
1753 {
1754         struct lov_request_set *set;
1755         struct obd_info oinfo;
1756         struct lov_request *req;
1757         struct list_head *pos;
1758         struct lov_obd *lov;
1759         struct lustre_handle *lov_lockhp;
1760         int err = 0, rc = 0;
1761         ENTRY;
1762
1763         ASSERT_LSM_MAGIC(lsm);
1764
1765         if (!exp || !exp->exp_obd)
1766                 RETURN(-ENODEV);
1767
1768         LASSERT_MDS_GROUP(lsm->lsm_object_gr);
1769         LASSERT(lockh);
1770         lov = &exp->exp_obd->u.lov;
1771         rc = lov_prep_cancel_set(exp, &oinfo, lsm, mode, lockh, &set);
1772         if (rc)
1773                 RETURN(rc);
1774
1775         list_for_each (pos, &set->set_list) {
1776                 req = list_entry(pos, struct lov_request, rq_link);
1777                 lov_lockhp = set->set_lockh->llh_handles + req->rq_stripe;
1778
1779                 rc = obd_cancel(lov->lov_tgts[req->rq_idx]->ltd_exp,
1780                                 req->rq_oi.oi_md, mode, lov_lockhp);
1781                 rc = lov_update_common_set(set, req, rc);
1782                 if (rc) {
1783                         CERROR("error: cancel objid "LPX64" subobj "
1784                                LPX64" on OST idx %d: rc = %d\n",
1785                                lsm->lsm_object_id,
1786                                req->rq_oi.oi_md->lsm_object_id,
1787                                req->rq_idx, rc);
1788                         err = rc;
1789                 }
1790
1791         }
1792         lov_fini_cancel_set(set);
1793         RETURN(err);
1794 }
1795
1796 static int lov_cancel_unused(struct obd_export *exp,
1797                              struct lov_stripe_md *lsm,
1798                              int flags, void *opaque)
1799 {
1800         struct lov_obd *lov;
1801         int rc = 0, i;
1802         ENTRY;
1803
1804         if (!exp || !exp->exp_obd)
1805                 RETURN(-ENODEV);
1806
1807         lov = &exp->exp_obd->u.lov;
1808         if (lsm == NULL) {
1809                 for (i = 0; i < lov->desc.ld_tgt_count; i++) {
1810                         int err;
1811                         if (!lov->lov_tgts[i] || !lov->lov_tgts[i]->ltd_exp)
1812                                 continue;
1813
1814                         err = obd_cancel_unused(lov->lov_tgts[i]->ltd_exp, NULL,
1815                                                 flags, opaque);
1816                         if (!rc)
1817                                 rc = err;
1818                 }
1819                 RETURN(rc);
1820         }
1821
1822         ASSERT_LSM_MAGIC(lsm);
1823
1824         LASSERT_MDS_GROUP(lsm->lsm_object_gr);
1825         for (i = 0; i < lsm->lsm_stripe_count; i++) {
1826                 struct lov_stripe_md submd;
1827                 struct lov_oinfo *loi = lsm->lsm_oinfo[i];
1828                 int err;
1829
1830                 if (!lov->lov_tgts[loi->loi_ost_idx]) {
1831                         CDEBUG(D_HA, "lov idx %d NULL\n", loi->loi_ost_idx);
1832                         continue;
1833                 }
1834
1835                 if (!lov->lov_tgts[loi->loi_ost_idx]->ltd_active)
1836                         CDEBUG(D_HA, "lov idx %d inactive\n", loi->loi_ost_idx);
1837
1838                 submd.lsm_object_id = loi->loi_id;
1839                 submd.lsm_object_gr = lsm->lsm_object_gr;
1840                 submd.lsm_stripe_count = 0;
1841                 err = obd_cancel_unused(lov->lov_tgts[loi->loi_ost_idx]->ltd_exp,
1842                                         &submd, flags, opaque);
1843                 if (err && lov->lov_tgts[loi->loi_ost_idx]->ltd_active) {
1844                         CERROR("error: cancel unused objid "LPX64" subobj "LPX64
1845                                " on OST idx %d: rc = %d\n", lsm->lsm_object_id,
1846                                loi->loi_id, loi->loi_ost_idx, err);
1847                         if (!rc)
1848                                 rc = err;
1849                 }
1850         }
1851         RETURN(rc);
1852 }
1853
1854 int lov_statfs_interpret(struct ptlrpc_request_set *rqset, void *data, int rc)
1855 {
1856         struct lov_request_set *lovset = (struct lov_request_set *)data;
1857         int err;
1858         ENTRY;
1859
1860         if (rc)
1861                 lovset->set_completes = 0;
1862
1863         err = lov_fini_statfs_set(lovset);
1864         RETURN(rc ? rc : err);
1865 }
1866
1867 static int lov_statfs_async(struct obd_device *obd, struct obd_info *oinfo,
1868                             __u64 max_age, struct ptlrpc_request_set *rqset)
1869 {
1870         struct lov_request_set *set;
1871         struct lov_request *req;
1872         struct list_head *pos;
1873         struct lov_obd *lov;
1874         int rc = 0;
1875         ENTRY;
1876
1877         LASSERT(oinfo != NULL);
1878         LASSERT(oinfo->oi_osfs != NULL);
1879
1880         lov = &obd->u.lov;
1881         rc = lov_prep_statfs_set(obd, oinfo, &set);
1882         if (rc)
1883                 RETURN(rc);
1884
1885         list_for_each (pos, &set->set_list) {
1886                 struct obd_device *osc_obd;
1887
1888                 req = list_entry(pos, struct lov_request, rq_link);
1889
1890                 osc_obd = class_exp2obd(lov->lov_tgts[req->rq_idx]->ltd_exp);
1891                 rc = obd_statfs_async(osc_obd, &req->rq_oi, max_age, rqset);
1892                 if (rc)
1893                         break;
1894         }
1895
1896         if (rc || list_empty(&rqset->set_requests)) {
1897                 int err;
1898                 if (rc)
1899                         set->set_completes = 0;
1900                 err = lov_fini_statfs_set(set);
1901                 RETURN(rc ? rc : err);
1902         }
1903
1904         LASSERT(rqset->set_interpret == NULL);
1905         rqset->set_interpret = lov_statfs_interpret;
1906         rqset->set_arg = (void *)set;
1907         RETURN(0);
1908 }
1909
1910 static int lov_statfs(struct obd_device *obd, struct obd_statfs *osfs,
1911                       __u64 max_age, __u32 flags)
1912 {
1913         struct ptlrpc_request_set *set = NULL;
1914         struct obd_info oinfo = { { { 0 } } };
1915         int rc = 0;
1916         ENTRY;
1917
1918
1919         /* for obdclass we forbid using obd_statfs_rqset, but prefer using async
1920          * statfs requests */
1921         set = ptlrpc_prep_set();
1922         if (set == NULL)
1923                 RETURN(-ENOMEM);
1924
1925         oinfo.oi_osfs = osfs;
1926         oinfo.oi_flags = flags;
1927         rc = lov_statfs_async(obd, &oinfo, max_age, set);
1928         if (rc == 0)
1929                 rc = ptlrpc_set_wait(set);
1930         ptlrpc_set_destroy(set);
1931
1932         RETURN(rc);
1933 }
1934
1935 static int lov_iocontrol(unsigned int cmd, struct obd_export *exp, int len,
1936                          void *karg, void *uarg)
1937 {
1938         struct obd_device *obddev = class_exp2obd(exp);
1939         struct lov_obd *lov = &obddev->u.lov;
1940         int i = 0, rc = 0, count = lov->desc.ld_tgt_count;
1941         struct obd_uuid *uuidp;
1942         ENTRY;
1943
1944         switch (cmd) {
1945         case IOC_OBD_STATFS: {
1946                 struct obd_ioctl_data *data = karg;
1947                 struct obd_device *osc_obd;
1948                 struct obd_statfs stat_buf = {0};
1949                 __u32 index;
1950
1951                 memcpy(&index, data->ioc_inlbuf2, sizeof(__u32));
1952                 LASSERT(data->ioc_plen1 == sizeof(struct obd_statfs));
1953
1954                 if ((index >= count))
1955                         RETURN(-ENODEV);
1956
1957                 if (!lov->lov_tgts[index])
1958                         /* Try again with the next index */
1959                         RETURN(-EAGAIN);
1960                 if (!lov->lov_tgts[index]->ltd_active)
1961                         RETURN(-ENODATA);
1962
1963                 osc_obd = class_exp2obd(lov->lov_tgts[index]->ltd_exp);
1964                 if (!osc_obd)
1965                         RETURN(-EINVAL);
1966
1967                 /* got statfs data */
1968                 rc = obd_statfs(osc_obd, &stat_buf,
1969                                 cfs_time_current_64() - HZ, 0);
1970                 if (rc)
1971                         RETURN(rc);
1972                 if (copy_to_user(data->ioc_pbuf1, &stat_buf, data->ioc_plen1))
1973                         RETURN(-EFAULT);
1974                 /* copy UUID */
1975                 if (copy_to_user(data->ioc_pbuf2, obd2cli_tgt(osc_obd),
1976                                  data->ioc_plen2))
1977                         RETURN(-EFAULT);
1978                 break;
1979         }
1980         case OBD_IOC_LOV_GET_CONFIG: {
1981                 struct obd_ioctl_data *data;
1982                 struct lov_desc *desc;
1983                 char *buf = NULL;
1984                 __u32 *genp;
1985
1986                 len = 0;
1987                 if (obd_ioctl_getdata(&buf, &len, (void *)uarg))
1988                         RETURN(-EINVAL);
1989
1990                 data = (struct obd_ioctl_data *)buf;
1991
1992                 if (sizeof(*desc) > data->ioc_inllen1) {
1993                         obd_ioctl_freedata(buf, len);
1994                         RETURN(-EINVAL);
1995                 }
1996
1997                 if (sizeof(uuidp->uuid) * count > data->ioc_inllen2) {
1998                         obd_ioctl_freedata(buf, len);
1999                         RETURN(-EINVAL);
2000                 }
2001
2002                 if (sizeof(__u32) * count > data->ioc_inllen3) {
2003                         obd_ioctl_freedata(buf, len);
2004                         RETURN(-EINVAL);
2005                 }
2006
2007                 desc = (struct lov_desc *)data->ioc_inlbuf1;
2008                 memcpy(desc, &(lov->desc), sizeof(*desc));
2009
2010                 uuidp = (struct obd_uuid *)data->ioc_inlbuf2;
2011                 genp = (__u32 *)data->ioc_inlbuf3;
2012                 /* the uuid will be empty for deleted OSTs */
2013                 for (i = 0; i < count; i++, uuidp++, genp++) {
2014                         if (!lov->lov_tgts[i])
2015                                 continue;
2016                         *uuidp = lov->lov_tgts[i]->ltd_uuid;
2017                         *genp = lov->lov_tgts[i]->ltd_gen;
2018                 }
2019
2020                 if (copy_to_user((void *)uarg, buf, len))
2021                         rc = -EFAULT;
2022                 obd_ioctl_freedata(buf, len);
2023                 break;
2024         }
2025         case LL_IOC_LOV_SETSTRIPE:
2026                 rc = lov_setstripe(exp, len, karg, uarg);
2027                 break;
2028         case LL_IOC_LOV_GETSTRIPE:
2029                 rc = lov_getstripe(exp, karg, uarg);
2030                 break;
2031         case LL_IOC_LOV_SETEA:
2032                 rc = lov_setea(exp, karg, uarg);
2033                 break;
2034         case OBD_IOC_QUOTACTL: {
2035                 struct if_quotactl *qctl = karg;
2036                 struct lov_tgt_desc *tgt = NULL;
2037                 struct obd_quotactl *oqctl;
2038
2039                 if (qctl->qc_valid == QC_OSTIDX) {
2040                         if (qctl->qc_idx < 0 || count <= qctl->qc_idx)
2041                                 RETURN(-EINVAL);
2042
2043                         tgt = lov->lov_tgts[qctl->qc_idx];
2044                         if (!tgt || !tgt->ltd_exp)
2045                                 RETURN(-EINVAL);
2046                 } else if (qctl->qc_valid == QC_UUID) {
2047                         for (i = 0; i < count; i++) {
2048                                 tgt = lov->lov_tgts[i];
2049                                 if (!tgt ||
2050                                     !obd_uuid_equals(&tgt->ltd_uuid,
2051                                                      &qctl->obd_uuid))
2052                                         continue;
2053
2054                                 if (tgt->ltd_exp == NULL)
2055                                         RETURN(-EINVAL);
2056
2057                                 break;
2058                         }
2059                 } else {
2060                         RETURN(-EINVAL);
2061                 }
2062
2063                 if (i >= count)
2064                         RETURN(-EAGAIN);
2065
2066                 LASSERT(tgt && tgt->ltd_exp);
2067                 OBD_ALLOC_PTR(oqctl);
2068                 if (!oqctl)
2069                         RETURN(-ENOMEM);
2070
2071                 QCTL_COPY(oqctl, qctl);
2072                 rc = obd_quotactl(tgt->ltd_exp, oqctl);
2073                 if (rc == 0) {
2074                         QCTL_COPY(qctl, oqctl);
2075                         qctl->qc_valid = QC_OSTIDX;
2076                         qctl->obd_uuid = tgt->ltd_uuid;
2077                 }
2078                 OBD_FREE_PTR(oqctl);
2079                 break;
2080         }
2081         default: {
2082                 int set = 0;
2083
2084                 if (count == 0)
2085                         RETURN(-ENOTTY);
2086
2087                 for (i = 0; i < count; i++) {
2088                         int err;
2089
2090                         /* OST was disconnected */
2091                         if (!lov->lov_tgts[i] || !lov->lov_tgts[i]->ltd_exp)
2092                                 continue;
2093
2094                         err = obd_iocontrol(cmd, lov->lov_tgts[i]->ltd_exp,
2095                                             len, karg, uarg);
2096                         if (err == -ENODATA && cmd == OBD_IOC_POLL_QUOTACHECK) {
2097                                 RETURN(err);
2098                         } else if (err) {
2099                                 if (lov->lov_tgts[i]->ltd_active) {
2100                                         CDEBUG(err == -ENOTTY ?
2101                                                D_IOCTL : D_WARNING,
2102                                                "iocontrol OSC %s on OST "
2103                                                "idx %d cmd %x: err = %d\n",
2104                                                lov_uuid2str(lov, i),
2105                                                i, cmd, err);
2106                                         if (!rc)
2107                                                 rc = err;
2108                                 }
2109                         } else {
2110                                 set = 1;
2111                         }
2112                 }
2113                 if (!set && !rc)
2114                         rc = -EIO;
2115         }
2116         }
2117
2118         RETURN(rc);
2119 }
2120
2121 #define FIEMAP_BUFFER_SIZE 4096
2122
2123 /**
2124  * Non-zero fe_logical indicates that this is a continuation FIEMAP
2125  * call. The local end offset and the device are sent in the first
2126  * fm_extent. This function calculates the stripe number from the index.
2127  * This function returns a stripe_no on which mapping is to be restarted.
2128  *
2129  * This function returns fm_end_offset which is the in-OST offset at which
2130  * mapping should be restarted. If fm_end_offset=0 is returned then caller
2131  * will re-calculate proper offset in next stripe.
2132  * Note that the first extent is passed to lov_get_info via the value field.
2133  *
2134  * \param fiemap fiemap request header
2135  * \param lsm striping information for the file
2136  * \param fm_start logical start of mapping
2137  * \param fm_end logical end of mapping
2138  * \param start_stripe starting stripe will be returned in this
2139  */
2140 obd_size fiemap_calc_fm_end_offset(struct ll_user_fiemap *fiemap,
2141                                    struct lov_stripe_md *lsm, obd_size fm_start,
2142                                    obd_size fm_end, int *start_stripe)
2143 {
2144         obd_size local_end = fiemap->fm_extents[0].fe_logical;
2145         obd_off lun_start, lun_end;
2146         obd_size fm_end_offset;
2147         int stripe_no = -1, i;
2148
2149         if (fiemap->fm_extent_count == 0 ||
2150             fiemap->fm_extents[0].fe_logical == 0)
2151                 return 0;
2152
2153         /* Find out stripe_no from ost_index saved in the fe_device */
2154         for (i = 0; i < lsm->lsm_stripe_count; i++) {
2155                 if (lsm->lsm_oinfo[i]->loi_ost_idx ==
2156                                         fiemap->fm_extents[0].fe_device) {
2157                         stripe_no = i;
2158                         break;
2159                 }
2160         }
2161
2162         /* If we have finished mapping on previous device, shift logical
2163          * offset to start of next device */
2164         if ((lov_stripe_intersects(lsm, stripe_no, fm_start, fm_end,
2165                                    &lun_start, &lun_end)) != 0 &&
2166                                    local_end < lun_end) {
2167                 fm_end_offset = local_end;
2168                 *start_stripe = stripe_no;
2169         } else {
2170                 /* This is a special value to indicate that caller should
2171                  * calculate offset in next stripe. */
2172                 fm_end_offset = 0;
2173                 *start_stripe = (stripe_no + 1) % lsm->lsm_stripe_count;
2174         }
2175
2176         return fm_end_offset;
2177 }
2178
2179 /**
2180  * We calculate on which OST the mapping will end. If the length of mapping
2181  * is greater than (stripe_size * stripe_count) then the last_stripe will
2182  * will be one just before start_stripe. Else we check if the mapping
2183  * intersects each OST and find last_stripe.
2184  * This function returns the last_stripe and also sets the stripe_count
2185  * over which the mapping is spread
2186  *
2187  * \param lsm striping information for the file
2188  * \param fm_start logical start of mapping
2189  * \param fm_end logical end of mapping
2190  * \param start_stripe starting stripe of the mapping
2191  * \param stripe_count the number of stripes across which to map is returned
2192  *
2193  * \retval last_stripe return the last stripe of the mapping
2194  */
2195 int fiemap_calc_last_stripe(struct lov_stripe_md *lsm, obd_size fm_start,
2196                             obd_size fm_end, int start_stripe,
2197                             int *stripe_count)
2198 {
2199         int last_stripe;
2200         obd_off obd_start, obd_end;
2201         int i, j;
2202
2203         if (fm_end - fm_start > lsm->lsm_stripe_size * lsm->lsm_stripe_count) {
2204                 last_stripe = (start_stripe < 1 ? lsm->lsm_stripe_count - 1 :
2205                                                               start_stripe - 1);
2206                 *stripe_count = lsm->lsm_stripe_count;
2207         } else {
2208                 for (j = 0, i = start_stripe; j < lsm->lsm_stripe_count;
2209                      i = (i + 1) % lsm->lsm_stripe_count, j++) {
2210                         if ((lov_stripe_intersects(lsm, i, fm_start, fm_end,
2211                                                    &obd_start, &obd_end)) == 0)
2212                                 break;
2213                 }
2214                 *stripe_count = j;
2215                 last_stripe = (start_stripe + j - 1) %lsm->lsm_stripe_count;
2216         }
2217
2218         return last_stripe;
2219 }
2220
2221 /**
2222  * Set fe_device and copy extents from local buffer into main return buffer.
2223  *
2224  * \param fiemap fiemap request header
2225  * \param lcl_fm_ext array of local fiemap extents to be copied
2226  * \param ost_index OST index to be written into the fm_device field for each
2227                     extent
2228  * \param ext_count number of extents to be copied
2229  * \param current_extent where to start copying in main extent array
2230  */
2231 void fiemap_prepare_and_copy_exts(struct ll_user_fiemap *fiemap,
2232                                   struct ll_fiemap_extent *lcl_fm_ext,
2233                                   int ost_index, unsigned int ext_count,
2234                                   int current_extent)
2235 {
2236         char *to;
2237         int ext;
2238
2239         for (ext = 0; ext < ext_count; ext++) {
2240                 lcl_fm_ext[ext].fe_device = ost_index;
2241                 lcl_fm_ext[ext].fe_flags |= FIEMAP_EXTENT_NET;
2242         }
2243
2244         /* Copy fm_extent's from fm_local to return buffer */
2245         to = (char *)fiemap + fiemap_count_to_size(current_extent);
2246         memcpy(to, lcl_fm_ext, ext_count * sizeof(struct ll_fiemap_extent));
2247 }
2248
2249 /**
2250  * Break down the FIEMAP request and send appropriate calls to individual OSTs.
2251  * This also handles the restarting of FIEMAP calls in case mapping overflows
2252  * the available number of extents in single call.
2253  */
2254 static int lov_fiemap(struct lov_obd *lov, __u32 keylen, void *key,
2255                       __u32 *vallen, void *val, struct lov_stripe_md *lsm)
2256 {
2257         struct ll_fiemap_info_key *fm_key = key;
2258         struct ll_user_fiemap *fiemap = val;
2259         struct ll_user_fiemap *fm_local = NULL;
2260         struct ll_fiemap_extent *lcl_fm_ext;
2261         int count_local;
2262         unsigned int get_num_extents = 0;
2263         int ost_index = 0, actual_start_stripe, start_stripe;
2264         obd_size fm_start, fm_end, fm_length, fm_end_offset = 0;
2265         obd_size curr_loc;
2266         int current_extent = 0, rc = 0, i;
2267         int ost_eof = 0; /* EOF for object */
2268         int ost_done = 0; /* done with required mapping for this OST? */
2269         int last_stripe;
2270         int cur_stripe = 0, cur_stripe_wrap = 0, stripe_count;
2271         unsigned int buffer_size = FIEMAP_BUFFER_SIZE;
2272
2273         if (lsm == NULL)
2274                 GOTO(out, rc = 0);
2275
2276         if (fiemap_count_to_size(fm_key->fiemap.fm_extent_count) < buffer_size)
2277                 buffer_size = fiemap_count_to_size(fm_key->fiemap.fm_extent_count);
2278
2279         OBD_ALLOC(fm_local, buffer_size);
2280         if (fm_local == NULL)
2281                 GOTO(out, rc = -ENOMEM);
2282         lcl_fm_ext = &fm_local->fm_extents[0];
2283
2284         count_local = fiemap_size_to_count(buffer_size);
2285
2286         memcpy(fiemap, &fm_key->fiemap, sizeof(*fiemap));
2287         fm_start = fiemap->fm_start;
2288         fm_length = fiemap->fm_length;
2289         /* Calculate start stripe, last stripe and length of mapping */
2290         actual_start_stripe = start_stripe = lov_stripe_number(lsm, fm_start);
2291         fm_end = (fm_length == ~0ULL ? fm_key->oa.o_size :
2292                                                 fm_start + fm_length - 1);
2293         /* If fm_length != ~0ULL but fm_start+fm_length-1 exceeds file size */
2294         if (fm_end > fm_key->oa.o_size)
2295                 fm_end = fm_key->oa.o_size;
2296
2297         last_stripe = fiemap_calc_last_stripe(lsm, fm_start, fm_end,
2298                                             actual_start_stripe, &stripe_count);
2299
2300         fm_end_offset = fiemap_calc_fm_end_offset(fiemap, lsm, fm_start, fm_end,
2301                                                   &start_stripe);
2302
2303         if (fiemap->fm_extent_count == 0) {
2304                 get_num_extents = 1;
2305                 count_local = 0;
2306         }
2307
2308         /* Check each stripe */
2309         for (cur_stripe = start_stripe, i = 0; i < stripe_count;
2310              i++, cur_stripe = (cur_stripe + 1) % lsm->lsm_stripe_count) {
2311                 obd_size req_fm_len; /* Stores length of required mapping */
2312                 obd_size len_mapped_single_call;
2313                 obd_off lun_start, lun_end, obd_object_end;
2314                 unsigned int ext_count;
2315
2316                 cur_stripe_wrap = cur_stripe;
2317
2318                 /* Find out range of mapping on this stripe */
2319                 if ((lov_stripe_intersects(lsm, cur_stripe, fm_start, fm_end,
2320                                            &lun_start, &obd_object_end)) == 0)
2321                         continue;
2322
2323                 /* If this is a continuation FIEMAP call and we are on
2324                  * starting stripe then lun_start needs to be set to
2325                  * fm_end_offset */
2326                 if (fm_end_offset != 0 && cur_stripe == start_stripe)
2327                         lun_start = fm_end_offset;
2328
2329                 if (fm_length != ~0ULL) {
2330                         /* Handle fm_start + fm_length overflow */
2331                         if (fm_start + fm_length < fm_start)
2332                                 fm_length = ~0ULL - fm_start;
2333                         lun_end = lov_size_to_stripe(lsm, fm_start + fm_length,
2334                                                      cur_stripe);
2335                 } else {
2336                         lun_end = ~0ULL;
2337                 }
2338
2339                 if (lun_start == lun_end)
2340                         continue;
2341
2342                 req_fm_len = obd_object_end - lun_start;
2343                 fm_local->fm_length = 0;
2344                 len_mapped_single_call = 0;
2345
2346                 /* If the output buffer is very large and the objects have many
2347                  * extents we may need to loop on a single OST repeatedly */
2348                 ost_eof = 0;
2349                 ost_done = 0;
2350                 do {
2351                         if (get_num_extents == 0) {
2352                                 /* Don't get too many extents. */
2353                                 if (current_extent + count_local >
2354                                     fiemap->fm_extent_count)
2355                                         count_local = fiemap->fm_extent_count -
2356                                                                  current_extent;
2357                         }
2358
2359                         lun_start += len_mapped_single_call;
2360                         fm_local->fm_length = req_fm_len - len_mapped_single_call;
2361                         req_fm_len = fm_local->fm_length;
2362                         fm_local->fm_extent_count = count_local;
2363                         fm_local->fm_mapped_extents = 0;
2364                         fm_local->fm_flags = fiemap->fm_flags;
2365
2366                         fm_key->oa.o_id = lsm->lsm_oinfo[cur_stripe]->loi_id;
2367                         ost_index = lsm->lsm_oinfo[cur_stripe]->loi_ost_idx;
2368
2369                         if (ost_index < 0 || ost_index >=lov->desc.ld_tgt_count)
2370                                 GOTO(out, rc = -EINVAL);
2371
2372                         /* If OST is inactive, return extent with UNKNOWN flag */
2373                         if (!lov->lov_tgts[ost_index]->ltd_active) {
2374                                 fm_local->fm_flags |= FIEMAP_EXTENT_LAST;
2375                                 fm_local->fm_mapped_extents = 1;
2376
2377                                 lcl_fm_ext[0].fe_logical = lun_start;
2378                                 lcl_fm_ext[0].fe_length = obd_object_end -
2379                                                                       lun_start;
2380                                 lcl_fm_ext[0].fe_flags |= FIEMAP_EXTENT_UNKNOWN;
2381
2382                                 goto inactive_tgt;
2383                         }
2384
2385                         fm_local->fm_start = lun_start;
2386                         fm_local->fm_flags &= ~FIEMAP_FLAG_DEVICE_ORDER;
2387                         memcpy(&fm_key->fiemap, fm_local, sizeof(*fm_local));
2388                         *vallen=fiemap_count_to_size(fm_local->fm_extent_count);
2389                         rc = obd_get_info(lov->lov_tgts[ost_index]->ltd_exp,
2390                                           keylen, key, vallen, fm_local, lsm);
2391                         if (rc != 0)
2392                                 GOTO(out, rc);
2393
2394 inactive_tgt:
2395                         ext_count = fm_local->fm_mapped_extents;
2396                         if (ext_count == 0) {
2397                                 ost_done = 1;
2398                                 /* If last stripe has hole at the end,
2399                                  * then we need to return */
2400                                 if (cur_stripe_wrap == last_stripe) {
2401                                         fiemap->fm_mapped_extents = 0;
2402                                         goto finish;
2403                                 }
2404                                 break;
2405                         }
2406
2407                         /* If we just need num of extents then go to next device */
2408                         if (get_num_extents) {
2409                                 current_extent += ext_count;
2410                                 break;
2411                         }
2412
2413                         len_mapped_single_call = lcl_fm_ext[ext_count-1].fe_logical -
2414                                   lun_start + lcl_fm_ext[ext_count - 1].fe_length;
2415
2416                         /* Have we finished mapping on this device? */
2417                         if (req_fm_len <= len_mapped_single_call)
2418                                 ost_done = 1;
2419
2420                         /* Clear the EXTENT_LAST flag which can be present on
2421                          * last extent */
2422                         if (lcl_fm_ext[ext_count-1].fe_flags & FIEMAP_EXTENT_LAST)
2423                                 lcl_fm_ext[ext_count - 1].fe_flags &=
2424                                                             ~FIEMAP_EXTENT_LAST;
2425
2426                         curr_loc = lov_stripe_size(lsm,
2427                                            lcl_fm_ext[ext_count - 1].fe_logical+
2428                                            lcl_fm_ext[ext_count - 1].fe_length,
2429                                            cur_stripe);
2430                         if (curr_loc >= fm_key->oa.o_size)
2431                                 ost_eof = 1;
2432
2433                         fiemap_prepare_and_copy_exts(fiemap, lcl_fm_ext,
2434                                                      ost_index, ext_count,
2435                                                      current_extent);
2436
2437                         current_extent += ext_count;
2438
2439                         /* Ran out of available extents? */
2440                         if (current_extent >= fiemap->fm_extent_count)
2441                                 goto finish;
2442                 } while (ost_done == 0 && ost_eof == 0);
2443
2444                 if (cur_stripe_wrap == last_stripe)
2445                         goto finish;
2446         }
2447
2448 finish:
2449         /* Indicate that we are returning device offsets unless file just has
2450          * single stripe */
2451         if (lsm->lsm_stripe_count > 1)
2452                 fiemap->fm_flags |= FIEMAP_FLAG_DEVICE_ORDER;
2453
2454         if (get_num_extents)
2455                 goto skip_last_device_calc;
2456
2457         /* Check if we have reached the last stripe and whether mapping for that
2458          * stripe is done. */
2459         if (cur_stripe_wrap == last_stripe) {
2460                 if (ost_done || ost_eof)
2461                         fiemap->fm_extents[current_extent - 1].fe_flags |=
2462                                                              FIEMAP_EXTENT_LAST;
2463         }
2464
2465 skip_last_device_calc:
2466         fiemap->fm_mapped_extents = current_extent;
2467
2468 out:
2469         OBD_FREE(fm_local, buffer_size);
2470         return rc;
2471 }
2472
2473 static int lov_get_info(struct obd_export *exp, __u32 keylen,
2474                         void *key, __u32 *vallen, void *val,
2475                         struct lov_stripe_md *lsm)
2476 {
2477         struct obd_device *obddev = class_exp2obd(exp);
2478         struct lov_obd *lov = &obddev->u.lov;
2479         int i, rc;
2480         ENTRY;
2481
2482         if (!vallen || !val)
2483                 RETURN(-EFAULT);
2484
2485         obd_getref(obddev);
2486
2487         if (KEY_IS(KEY_LOCK_TO_STRIPE)) {
2488                 struct {
2489                         char name[16];
2490                         struct ldlm_lock *lock;
2491                 } *data = key;
2492                 struct ldlm_res_id *res_id = &data->lock->l_resource->lr_name;
2493                 struct lov_oinfo *loi;
2494                 __u32 *stripe = val;
2495
2496                 if (*vallen < sizeof(*stripe))
2497                         GOTO(out, rc = -EFAULT);
2498                 *vallen = sizeof(*stripe);
2499
2500                 /* XXX This is another one of those bits that will need to
2501                  * change if we ever actually support nested LOVs.  It uses
2502                  * the lock's export to find out which stripe it is. */
2503                 /* XXX - it's assumed all the locks for deleted OSTs have
2504                  * been cancelled. Also, the export for deleted OSTs will
2505                  * be NULL and won't match the lock's export. */
2506                 for (i = 0; i < lsm->lsm_stripe_count; i++) {
2507                         loi = lsm->lsm_oinfo[i];
2508                         if (!lov->lov_tgts[loi->loi_ost_idx])
2509                                 continue;
2510                         if (lov->lov_tgts[loi->loi_ost_idx]->ltd_exp ==
2511                             data->lock->l_conn_export &&
2512                             osc_res_name_eq(loi->loi_id, loi->loi_gr, res_id)) {
2513                                 *stripe = i;
2514                                 GOTO(out, rc = 0);
2515                         }
2516                 }
2517                 LDLM_ERROR(data->lock, "lock on inode without such object");
2518                 dump_lsm(D_ERROR, lsm);
2519                 GOTO(out, rc = -ENXIO);
2520         } else if (KEY_IS(KEY_LAST_ID)) {
2521                 struct obd_id_info *info = val;
2522                 __u32 size = sizeof(obd_id);
2523                 struct lov_tgt_desc *tgt;
2524
2525                 LASSERT(*vallen == sizeof(struct obd_id_info));
2526                 tgt = lov->lov_tgts[info->idx];
2527
2528                 if (!tgt || !tgt->ltd_active)
2529                         GOTO(out, rc = -ESRCH);
2530
2531                 rc = obd_get_info(tgt->ltd_exp, keylen, key, &size, info->data, NULL);
2532                 GOTO(out, rc = 0);
2533         } else if (KEY_IS(KEY_LOVDESC)) {
2534                 struct lov_desc *desc_ret = val;
2535                 *desc_ret = lov->desc;
2536
2537                 GOTO(out, rc = 0);
2538         } else if (KEY_IS(KEY_FIEMAP)) {
2539                 rc = lov_fiemap(lov, keylen, key, vallen, val, lsm);
2540                 GOTO(out, rc);
2541         }
2542
2543         rc = -EINVAL;
2544
2545 out:
2546         obd_putref(obddev);
2547         RETURN(rc);
2548 }
2549
2550 static int lov_set_info_async(struct obd_export *exp, obd_count keylen,
2551                               void *key, obd_count vallen, void *val,
2552                               struct ptlrpc_request_set *set)
2553 {
2554         struct obd_device *obddev = class_exp2obd(exp);
2555         struct lov_obd *lov = &obddev->u.lov;
2556         obd_count count;
2557         int i, rc = 0, err;
2558         struct lov_tgt_desc *tgt;
2559         unsigned incr, check_uuid,
2560                  do_inactive, no_set;
2561         unsigned next_id = 0,  mds_con = 0, capa = 0;
2562         ENTRY;
2563
2564         incr = check_uuid = do_inactive = no_set = 0;
2565         if (set == NULL) {
2566                 no_set = 1;
2567                 set = ptlrpc_prep_set();
2568                 if (!set)
2569                         RETURN(-ENOMEM);
2570         }
2571
2572         obd_getref(obddev);
2573         count = lov->desc.ld_tgt_count;
2574
2575         if (KEY_IS(KEY_NEXT_ID)) {
2576                 count = vallen / sizeof(struct obd_id_info);
2577                 vallen = sizeof(obd_id);
2578                 incr = sizeof(struct obd_id_info);
2579                 do_inactive = 1;
2580                 next_id = 1;
2581         } else if (KEY_IS(KEY_CHECKSUM)) {
2582                 do_inactive = 1;
2583         } else if (KEY_IS(KEY_EVICT_BY_NID)) {
2584                 /* use defaults:  do_inactive = incr = 0; */
2585         } else if (KEY_IS(KEY_MDS_CONN)) {
2586                 mds_con = 1;
2587         } else if (KEY_IS(KEY_CAPA_KEY)) {
2588                 capa = 1;
2589         }
2590
2591         for (i = 0; i < count; i++, val = (char *)val + incr) {
2592                 if (next_id) {
2593                         tgt = lov->lov_tgts[((struct obd_id_info*)val)->idx];
2594                 } else {
2595                         tgt = lov->lov_tgts[i];
2596                 }
2597                 /* OST was disconnected */
2598                 if (!tgt || !tgt->ltd_exp)
2599                         continue;
2600
2601                 /* OST is inactive and we don't want inactive OSCs */
2602                 if (!tgt->ltd_active && !do_inactive)
2603                         continue;
2604
2605                 if (mds_con) {
2606                         struct mds_group_info *mgi;
2607
2608                         LASSERT(vallen == sizeof(*mgi));
2609                         mgi = (struct mds_group_info *)val;
2610
2611                         /* Only want a specific OSC */
2612                         if (mgi->uuid && !obd_uuid_equals(mgi->uuid,
2613                                                 &tgt->ltd_uuid))
2614                                 continue;
2615
2616                         err = obd_set_info_async(tgt->ltd_exp,
2617                                          keylen, key, sizeof(int),
2618                                          &mgi->group, set);
2619                 } else if (next_id) {
2620                         err = obd_set_info_async(tgt->ltd_exp,
2621                                          keylen, key, vallen,
2622                                          ((struct obd_id_info*)val)->data, set);
2623                 } else if (capa) {
2624                         struct mds_capa_info *info = (struct mds_capa_info*)val;
2625
2626                         LASSERT(vallen == sizeof(*info));
2627
2628                          /* Only want a specific OSC */
2629                         if (info->uuid &&
2630                             !obd_uuid_equals(info->uuid, &tgt->ltd_uuid))
2631                                 continue;
2632
2633                         err = obd_set_info_async(tgt->ltd_exp, keylen, key,
2634                                                  sizeof(*info->capa),
2635                                                  info->capa, set);
2636
2637                 } else {
2638                         /* Only want a specific OSC */
2639                         if (check_uuid &&
2640                             !obd_uuid_equals(val, &tgt->ltd_uuid))
2641                                 continue;
2642
2643                         err = obd_set_info_async(tgt->ltd_exp,
2644                                          keylen, key, vallen, val, set);
2645                 }
2646
2647                 if (!rc)
2648                         rc = err;
2649         }
2650
2651         obd_putref(obddev);
2652         if (no_set) {
2653                 err = ptlrpc_set_wait(set);
2654                 if (!rc)
2655                         rc = err;
2656                 ptlrpc_set_destroy(set);
2657         }
2658         RETURN(rc);
2659 }
2660
2661 int lov_test_and_clear_async_rc(struct lov_stripe_md *lsm)
2662 {
2663         int i, rc = 0;
2664         ENTRY;
2665
2666         for (i = 0; i < lsm->lsm_stripe_count; i++) {
2667                 struct lov_oinfo *loi = lsm->lsm_oinfo[i];
2668                 if (loi->loi_ar.ar_rc && !rc)
2669                         rc = loi->loi_ar.ar_rc;
2670                 loi->loi_ar.ar_rc = 0;
2671         }
2672         RETURN(rc);
2673 }
2674 EXPORT_SYMBOL(lov_test_and_clear_async_rc);
2675
2676
2677 static int lov_extent_calc(struct obd_export *exp, struct lov_stripe_md *lsm,
2678                            int cmd, __u64 *offset)
2679 {
2680         __u32 ssize = lsm->lsm_stripe_size;
2681         __u64 start;
2682
2683         start = *offset;
2684         do_div(start, ssize);
2685         start = start * ssize;
2686
2687         CDEBUG(D_DLMTRACE, "offset "LPU64", stripe %u, start "LPU64
2688                            ", end "LPU64"\n", *offset, ssize, start,
2689                            start + ssize - 1);
2690         if (cmd == OBD_CALC_STRIPE_END) {
2691                 *offset = start + ssize - 1;
2692         } else if (cmd == OBD_CALC_STRIPE_START) {
2693                 *offset = start;
2694         } else {
2695                 LBUG();
2696         }
2697
2698         RETURN(0);
2699 }
2700
2701 void lov_stripe_lock(struct lov_stripe_md *md)
2702 {
2703         LASSERT(md->lsm_lock_owner != cfs_curproc_pid());
2704         spin_lock(&md->lsm_lock);
2705         LASSERT(md->lsm_lock_owner == 0);
2706         md->lsm_lock_owner = cfs_curproc_pid();
2707 }
2708 EXPORT_SYMBOL(lov_stripe_lock);
2709
2710 void lov_stripe_unlock(struct lov_stripe_md *md)
2711 {
2712         LASSERT(md->lsm_lock_owner == cfs_curproc_pid());
2713         md->lsm_lock_owner = 0;
2714         spin_unlock(&md->lsm_lock);
2715 }
2716 EXPORT_SYMBOL(lov_stripe_unlock);
2717
2718
2719 struct obd_ops lov_obd_ops = {
2720         .o_owner               = THIS_MODULE,
2721         .o_setup               = lov_setup,
2722         .o_precleanup          = lov_precleanup,
2723         .o_cleanup             = lov_cleanup,
2724         //.o_process_config      = lov_process_config,
2725         .o_connect             = lov_connect,
2726         .o_disconnect          = lov_disconnect,
2727         .o_statfs              = lov_statfs,
2728         .o_statfs_async        = lov_statfs_async,
2729         .o_packmd              = lov_packmd,
2730         .o_unpackmd            = lov_unpackmd,
2731         .o_create              = lov_create,
2732         .o_destroy             = lov_destroy,
2733         .o_getattr             = lov_getattr,
2734         .o_getattr_async       = lov_getattr_async,
2735         .o_setattr             = lov_setattr,
2736         .o_setattr_async       = lov_setattr_async,
2737         .o_brw                 = lov_brw,
2738         .o_merge_lvb           = lov_merge_lvb,
2739         .o_adjust_kms          = lov_adjust_kms,
2740         .o_punch               = lov_punch,
2741         .o_sync                = lov_sync,
2742         .o_enqueue             = lov_enqueue,
2743         .o_change_cbdata       = lov_change_cbdata,
2744         .o_cancel              = lov_cancel,
2745         .o_cancel_unused       = lov_cancel_unused,
2746         .o_iocontrol           = lov_iocontrol,
2747         .o_get_info            = lov_get_info,
2748         .o_set_info_async      = lov_set_info_async,
2749         .o_extent_calc         = lov_extent_calc,
2750         .o_llog_init           = lov_llog_init,
2751         .o_llog_finish         = lov_llog_finish,
2752         .o_notify              = lov_notify,
2753         .o_pool_new            = lov_pool_new,
2754         .o_pool_rem            = lov_pool_remove,
2755         .o_pool_add            = lov_pool_add,
2756         .o_pool_del            = lov_pool_del,
2757         .o_getref              = lov_getref,
2758         .o_putref              = lov_putref,
2759 };
2760
2761 static quota_interface_t *quota_interface;
2762 extern quota_interface_t lov_quota_interface;
2763
2764 cfs_mem_cache_t *lov_oinfo_slab;
2765
2766 extern struct lu_kmem_descr lov_caches[];
2767
2768 int __init lov_init(void)
2769 {
2770         struct lprocfs_static_vars lvars = { 0 };
2771         int rc, rc2;
2772         ENTRY;
2773
2774         /* print an address of _any_ initialized kernel symbol from this
2775          * module, to allow debugging with gdb that doesn't support data
2776          * symbols from modules.*/
2777         CDEBUG(D_CONSOLE, "Lustre LOV module (%p).\n", &lov_caches);
2778
2779         rc = lu_kmem_init(lov_caches);
2780         if (rc)
2781                 return rc;
2782
2783         lov_oinfo_slab = cfs_mem_cache_create("lov_oinfo",
2784                                               sizeof(struct lov_oinfo),
2785                                               0, SLAB_HWCACHE_ALIGN);
2786         if (lov_oinfo_slab == NULL) {
2787                 lu_kmem_fini(lov_caches);
2788                 return -ENOMEM;
2789         }
2790         lprocfs_lov_init_vars(&lvars);
2791
2792         request_module("lquota");
2793         quota_interface = PORTAL_SYMBOL_GET(lov_quota_interface);
2794         init_obd_quota_ops(quota_interface, &lov_obd_ops);
2795
2796         rc = class_register_type(&lov_obd_ops, NULL, lvars.module_vars,
2797                                  LUSTRE_LOV_NAME, &lov_device_type);
2798
2799         if (rc) {
2800                 if (quota_interface)
2801                         PORTAL_SYMBOL_PUT(lov_quota_interface);
2802                 rc2 = cfs_mem_cache_destroy(lov_oinfo_slab);
2803                 LASSERT(rc2 == 0);
2804                 lu_kmem_fini(lov_caches);
2805         }
2806
2807         RETURN(rc);
2808 }
2809
2810 #ifdef __KERNEL__
2811 static void /*__exit*/ lov_exit(void)
2812 {
2813         int rc;
2814
2815         lu_device_type_fini(&lov_device_type);
2816         lu_kmem_fini(lov_caches);
2817
2818         if (quota_interface)
2819                 PORTAL_SYMBOL_PUT(lov_quota_interface);
2820
2821         class_unregister_type(LUSTRE_LOV_NAME);
2822         rc = cfs_mem_cache_destroy(lov_oinfo_slab);
2823         LASSERT(rc == 0);
2824 }
2825
2826 MODULE_AUTHOR("Sun Microsystems, Inc. <http://www.lustre.org/>");
2827 MODULE_DESCRIPTION("Lustre Logical Object Volume OBD driver");
2828 MODULE_LICENSE("GPL");
2829
2830 cfs_module(lov, LUSTRE_VERSION_STRING, lov_init, lov_exit);
2831 #endif