drivers/staging/lustre/lustre/lov/lov_obd.c

   1 /*
   2  * GPL HEADER START
   3  *
   4  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License version 2 only,
   8  * as published by the Free Software Foundation.
   9  *
  10  * This program is distributed in the hope that it will be useful, but
  11  * WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13  * General Public License version 2 for more details (a copy is included
  14  * in the LICENSE file that accompanied this code).
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * version 2 along with this program; If not, see
  18  * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
  19  *
  20  * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
  21  * CA 95054 USA or visit www.sun.com if you need additional information or
  22  * have any questions.
  23  *
  24  * GPL HEADER END
  25  */
  26 /*
  27  * Copyright (c) 2002, 2010, Oracle and/or its affiliates. All rights reserved.
  28  * Use is subject to license terms.
  29  *
  30  * Copyright (c) 2011, 2012, Intel Corporation.
  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 #define DEBUG_SUBSYSTEM S_LOV
  45 #include <linux/libcfs/libcfs.h>
  46
  47 #include <obd_support.h>
  48 #include <lustre_lib.h>
  49 #include <lustre_net.h>
  50 #include <lustre/lustre_idl.h>
  51 #include <lustre_dlm.h>
  52 #include <lustre_mds.h>
  53 #include <lustre_debug.h>
  54 #include <obd_class.h>
  55 #include <obd_lov.h>
  56 #include <obd_ost.h>
  57 #include <lprocfs_status.h>
  58 #include <lustre_param.h>
  59 #include <cl_object.h>
  60 #include <lclient.h> /* for cl_client_lru */
  61 #include <lustre/ll_fiemap.h>
  62 #include <lustre_log.h>
  63 #include <lustre_fid.h>
  64
  65 #include "lov_internal.h"
  66
  67 /* Keep a refcount of lov->tgt usage to prevent racing with addition/deletion.
  68    Any function that expects lov_tgts to remain stationary must take a ref. */
  69 static void lov_getref(struct obd_device *obd)
  70 {
  71         struct lov_obd *lov = &obd->u.lov;
  72
  73         /* nobody gets through here until lov_putref is done */
  74         mutex_lock(&lov->lov_lock);
  75         atomic_inc(&lov->lov_refcount);
  76         mutex_unlock(&lov->lov_lock);
  77         return;
  78 }
  79
  80 static void __lov_del_obd(struct obd_device *obd, struct lov_tgt_desc *tgt);
  81
  82 static void lov_putref(struct obd_device *obd)
  83 {
  84         struct lov_obd *lov = &obd->u.lov;
  85
  86         mutex_lock(&lov->lov_lock);
  87         /* ok to dec to 0 more than once -- ltd_exp's will be null */
  88         if (atomic_dec_and_test(&lov->lov_refcount) && lov->lov_death_row) {
  89                 LIST_HEAD(kill);
  90                 int i;
  91                 struct lov_tgt_desc *tgt, *n;
  92                 CDEBUG(D_CONFIG, "destroying %d lov targets\n",
  93                        lov->lov_death_row);
  94                 for (i = 0; i < lov->desc.ld_tgt_count; i++) {
  95                         tgt = lov->lov_tgts[i];
  96
  97                         if (!tgt || !tgt->ltd_reap)
  98                                 continue;
  99                         list_add(&tgt->ltd_kill, &kill);
 100                         /* XXX - right now there is a dependency on ld_tgt_count
 101                          * being the maximum tgt index for computing the
 102                          * mds_max_easize. So we can't shrink it. */
 103                         lov_ost_pool_remove(&lov->lov_packed, i);
 104                         lov->lov_tgts[i] = NULL;
 105                         lov->lov_death_row--;
 106                 }
 107                 mutex_unlock(&lov->lov_lock);
 108
 109                 list_for_each_entry_safe(tgt, n, &kill, ltd_kill) {
 110                         list_del(&tgt->ltd_kill);
 111                         /* Disconnect */
 112                         __lov_del_obd(obd, tgt);
 113                 }
 114         } else {
 115                 mutex_unlock(&lov->lov_lock);
 116         }
 117 }
 118
 119 static int lov_set_osc_active(struct obd_device *obd, struct obd_uuid *uuid,
 120                               enum obd_notify_event ev);
 121 static int lov_notify(struct obd_device *obd, struct obd_device *watched,
 122                       enum obd_notify_event ev, void *data);
 123
 124
 125 #define MAX_STRING_SIZE 128
 126 int lov_connect_obd(struct obd_device *obd, __u32 index, int activate,
 127                     struct obd_connect_data *data)
 128 {
 129         struct lov_obd *lov = &obd->u.lov;
 130         struct obd_uuid *tgt_uuid;
 131         struct obd_device *tgt_obd;
 132         static struct obd_uuid lov_osc_uuid = { "LOV_OSC_UUID" };
 133         struct obd_import *imp;
 134         proc_dir_entry_t *lov_proc_dir;
 135         int rc;
 136         ENTRY;
 137
 138         if (!lov->lov_tgts[index])
 139                 RETURN(-EINVAL);
 140
 141         tgt_uuid = &lov->lov_tgts[index]->ltd_uuid;
 142         tgt_obd = lov->lov_tgts[index]->ltd_obd;
 143
 144         if (!tgt_obd->obd_set_up) {
 145                 CERROR("Target %s not set up\n", obd_uuid2str(tgt_uuid));
 146                 RETURN(-EINVAL);
 147         }
 148
 149         /* override the sp_me from lov */
 150         tgt_obd->u.cli.cl_sp_me = lov->lov_sp_me;
 151
 152         if (data && (data->ocd_connect_flags & OBD_CONNECT_INDEX))
 153                 data->ocd_index = index;
 154
 155         /*
 156          * Divine LOV knows that OBDs under it are OSCs.
 157          */
 158         imp = tgt_obd->u.cli.cl_import;
 159
 160         if (activate) {
 161                 tgt_obd->obd_no_recov = 0;
 162                 /* FIXME this is probably supposed to be
 163                    ptlrpc_set_import_active.  Horrible naming. */
 164                 ptlrpc_activate_import(imp);
 165         }
 166
 167         rc = obd_register_observer(tgt_obd, obd);
 168         if (rc) {
 169                 CERROR("Target %s register_observer error %d\n",
 170                        obd_uuid2str(tgt_uuid), rc);
 171                 RETURN(rc);
 172         }
 173
 174
 175         if (imp->imp_invalid) {
 176                 CDEBUG(D_CONFIG, "not connecting OSC %s; administratively "
 177                        "disabled\n", obd_uuid2str(tgt_uuid));
 178                 RETURN(0);
 179         }
 180
 181         rc = obd_connect(NULL, &lov->lov_tgts[index]->ltd_exp, tgt_obd,
 182                          &lov_osc_uuid, data, NULL);
 183         if (rc || !lov->lov_tgts[index]->ltd_exp) {
 184                 CERROR("Target %s connect error %d\n",
 185                        obd_uuid2str(tgt_uuid), rc);
 186                 RETURN(-ENODEV);
 187         }
 188
 189         lov->lov_tgts[index]->ltd_reap = 0;
 190
 191         CDEBUG(D_CONFIG, "Connected tgt idx %d %s (%s) %sactive\n", index,
 192                obd_uuid2str(tgt_uuid), tgt_obd->obd_name, activate ? "":"in");
 193
 194         lov_proc_dir = obd->obd_proc_private;
 195         if (lov_proc_dir) {
 196                 struct obd_device *osc_obd = lov->lov_tgts[index]->ltd_exp->exp_obd;
 197                 proc_dir_entry_t *osc_symlink;
 198
 199                 LASSERT(osc_obd != NULL);
 200                 LASSERT(osc_obd->obd_magic == OBD_DEVICE_MAGIC);
 201                 LASSERT(osc_obd->obd_type->typ_name != NULL);
 202
 203                 osc_symlink = lprocfs_add_symlink(osc_obd->obd_name,
 204                                                   lov_proc_dir,
 205                                                   "../../../%s/%s",
 206                                                   osc_obd->obd_type->typ_name,
 207                                                   osc_obd->obd_name);
 208                 if (osc_symlink == NULL) {
 209                         CERROR("could not register LOV target "
 210                                 "/proc/fs/lustre/%s/%s/target_obds/%s.",
 211                                 obd->obd_type->typ_name, obd->obd_name,
 212                                 osc_obd->obd_name);
 213                         lprocfs_remove(&lov_proc_dir);
 214                         obd->obd_proc_private = NULL;
 215                 }
 216         }
 217
 218         RETURN(0);
 219 }
 220
 221 static int lov_connect(const struct lu_env *env,
 222                        struct obd_export **exp, struct obd_device *obd,
 223                        struct obd_uuid *cluuid, struct obd_connect_data *data,
 224                        void *localdata)
 225 {
 226         struct lov_obd *lov = &obd->u.lov;
 227         struct lov_tgt_desc *tgt;
 228         struct lustre_handle conn;
 229         int i, rc;
 230         ENTRY;
 231
 232         CDEBUG(D_CONFIG, "connect #%d\n", lov->lov_connects);
 233
 234         rc = class_connect(&conn, obd, cluuid);
 235         if (rc)
 236                 RETURN(rc);
 237
 238         *exp = class_conn2export(&conn);
 239
 240         /* Why should there ever be more than 1 connect? */
 241         lov->lov_connects++;
 242         LASSERT(lov->lov_connects == 1);
 243
 244         memset(&lov->lov_ocd, 0, sizeof(lov->lov_ocd));
 245         if (data)
 246                 lov->lov_ocd = *data;
 247
 248         obd_getref(obd);
 249         for (i = 0; i < lov->desc.ld_tgt_count; i++) {
 250                 tgt = lov->lov_tgts[i];
 251                 if (!tgt || obd_uuid_empty(&tgt->ltd_uuid))
 252                         continue;
 253                 /* Flags will be lowest common denominator */
 254                 rc = lov_connect_obd(obd, i, tgt->ltd_activate, &lov->lov_ocd);
 255                 if (rc) {
 256                         CERROR("%s: lov connect tgt %d failed: %d\n",
 257                                obd->obd_name, i, rc);
 258                         continue;
 259                 }
 260                 /* connect to administrative disabled ost */
 261                 if (!lov->lov_tgts[i]->ltd_exp)
 262                         continue;
 263
 264                 rc = lov_notify(obd, lov->lov_tgts[i]->ltd_exp->exp_obd,
 265                                 OBD_NOTIFY_CONNECT, (void *)&i);
 266                 if (rc) {
 267                         CERROR("%s error sending notify %d\n",
 268                                obd->obd_name, rc);
 269                 }
 270         }
 271         obd_putref(obd);
 272
 273         RETURN(0);
 274 }
 275
 276 static int lov_disconnect_obd(struct obd_device *obd, struct lov_tgt_desc *tgt)
 277 {
 278         proc_dir_entry_t *lov_proc_dir;
 279         struct lov_obd *lov = &obd->u.lov;
 280         struct obd_device *osc_obd;
 281         int rc;
 282         ENTRY;
 283
 284         osc_obd = class_exp2obd(tgt->ltd_exp);
 285         CDEBUG(D_CONFIG, "%s: disconnecting target %s\n",
 286                obd->obd_name, osc_obd->obd_name);
 287
 288         if (tgt->ltd_active) {
 289                 tgt->ltd_active = 0;
 290                 lov->desc.ld_active_tgt_count--;
 291                 tgt->ltd_exp->exp_obd->obd_inactive = 1;
 292         }
 293
 294         lov_proc_dir = obd->obd_proc_private;
 295         if (lov_proc_dir)
 296                 lprocfs_remove_proc_entry(osc_obd->obd_name, lov_proc_dir);
 297
 298         if (osc_obd) {
 299                 /* Pass it on to our clients.
 300                  * XXX This should be an argument to disconnect,
 301                  * XXX not a back-door flag on the OBD.  Ah well.
 302                  */
 303                 osc_obd->obd_force = obd->obd_force;
 304                 osc_obd->obd_fail = obd->obd_fail;
 305                 osc_obd->obd_no_recov = obd->obd_no_recov;
 306         }
 307
 308         obd_register_observer(osc_obd, NULL);
 309
 310         rc = obd_disconnect(tgt->ltd_exp);
 311         if (rc) {
 312                 CERROR("Target %s disconnect error %d\n",
 313                        tgt->ltd_uuid.uuid, rc);
 314                 rc = 0;
 315         }
 316
 317         tgt->ltd_exp = NULL;
 318         RETURN(0);
 319 }
 320
 321 static int lov_disconnect(struct obd_export *exp)
 322 {
 323         struct obd_device *obd = class_exp2obd(exp);
 324         struct lov_obd *lov = &obd->u.lov;
 325         int i, rc;
 326         ENTRY;
 327
 328         if (!lov->lov_tgts)
 329                 goto out;
 330
 331         /* Only disconnect the underlying layers on the final disconnect. */
 332         lov->lov_connects--;
 333         if (lov->lov_connects != 0) {
 334                 /* why should there be more than 1 connect? */
 335                 CERROR("disconnect #%d\n", lov->lov_connects);
 336                 goto out;
 337         }
 338
 339         /* Let's hold another reference so lov_del_obd doesn't spin through
 340            putref every time */
 341         obd_getref(obd);
 342
 343         for (i = 0; i < lov->desc.ld_tgt_count; i++) {
 344                 if (lov->lov_tgts[i] && lov->lov_tgts[i]->ltd_exp) {
 345                         /* Disconnection is the last we know about an obd */
 346                         lov_del_target(obd, i, 0, lov->lov_tgts[i]->ltd_gen);
 347                 }
 348         }
 349         obd_putref(obd);
 350
 351 out:
 352         rc = class_disconnect(exp); /* bz 9811 */
 353         RETURN(rc);
 354 }
 355
 356 /* Error codes:
 357  *
 358  *  -EINVAL  : UUID can't be found in the LOV's target list
 359  *  -ENOTCONN: The UUID is found, but the target connection is bad (!)
 360  *  -EBADF   : The UUID is found, but the OBD is the wrong type (!)
 361  *  any >= 0 : is log target index
 362  */
 363 static int lov_set_osc_active(struct obd_device *obd, struct obd_uuid *uuid,
 364                               enum obd_notify_event ev)
 365 {
 366         struct lov_obd *lov = &obd->u.lov;
 367         struct lov_tgt_desc *tgt;
 368         int index, activate, active;
 369         ENTRY;
 370
 371         CDEBUG(D_INFO, "Searching in lov %p for uuid %s event(%d)\n",
 372                lov, uuid->uuid, ev);
 373
 374         obd_getref(obd);
 375         for (index = 0; index < lov->desc.ld_tgt_count; index++) {
 376                 tgt = lov->lov_tgts[index];
 377                 if (!tgt)
 378                         continue;
 379                 /*
 380                  * LU-642, initially inactive OSC could miss the obd_connect,
 381                  * we make up for it here.
 382                  */
 383                 if (ev == OBD_NOTIFY_ACTIVATE && tgt->ltd_exp == NULL &&
 384                     obd_uuid_equals(uuid, &tgt->ltd_uuid)) {
 385                         struct obd_uuid lov_osc_uuid = {"LOV_OSC_UUID"};
 386
 387                         obd_connect(NULL, &tgt->ltd_exp, tgt->ltd_obd,
 388                                     &lov_osc_uuid, &lov->lov_ocd, NULL);
 389                 }
 390                 if (!tgt->ltd_exp)
 391                         continue;
 392
 393                 CDEBUG(D_INFO, "lov idx %d is %s conn "LPX64"\n",
 394                        index, obd_uuid2str(&tgt->ltd_uuid),
 395                        tgt->ltd_exp->exp_handle.h_cookie);
 396                 if (obd_uuid_equals(uuid, &tgt->ltd_uuid))
 397                         break;
 398         }
 399
 400         if (index == lov->desc.ld_tgt_count)
 401                 GOTO(out, index = -EINVAL);
 402
 403         if (ev == OBD_NOTIFY_DEACTIVATE || ev == OBD_NOTIFY_ACTIVATE) {
 404                 activate = (ev == OBD_NOTIFY_ACTIVATE) ? 1 : 0;
 405
 406                 if (lov->lov_tgts[index]->ltd_activate == activate) {
 407                         CDEBUG(D_INFO, "OSC %s already %sactivate!\n",
 408                                uuid->uuid, activate ? "" : "de");
 409                 } else {
 410                         lov->lov_tgts[index]->ltd_activate = activate;
 411                         CDEBUG(D_CONFIG, "%sactivate OSC %s\n",
 412                                activate ? "" : "de", obd_uuid2str(uuid));
 413                 }
 414
 415         } else if (ev == OBD_NOTIFY_INACTIVE || ev == OBD_NOTIFY_ACTIVE) {
 416                 active = (ev == OBD_NOTIFY_ACTIVE) ? 1 : 0;
 417
 418                 if (lov->lov_tgts[index]->ltd_active == active) {
 419                         CDEBUG(D_INFO, "OSC %s already %sactive!\n",
 420                                uuid->uuid, active ? "" : "in");
 421                         GOTO(out, index);
 422                 } else {
 423                         CDEBUG(D_CONFIG, "Marking OSC %s %sactive\n",
 424                                obd_uuid2str(uuid), active ? "" : "in");
 425                 }
 426
 427                 lov->lov_tgts[index]->ltd_active = active;
 428                 if (active) {
 429                         lov->desc.ld_active_tgt_count++;
 430                         lov->lov_tgts[index]->ltd_exp->exp_obd->obd_inactive = 0;
 431                 } else {
 432                         lov->desc.ld_active_tgt_count--;
 433                         lov->lov_tgts[index]->ltd_exp->exp_obd->obd_inactive = 1;
 434                 }
 435         } else {
 436                 CERROR("Unknown event(%d) for uuid %s", ev, uuid->uuid);
 437         }
 438
 439  out:
 440         obd_putref(obd);
 441         RETURN(index);
 442 }
 443
 444 static int lov_notify(struct obd_device *obd, struct obd_device *watched,
 445                       enum obd_notify_event ev, void *data)
 446 {
 447         int rc = 0;
 448         struct lov_obd *lov = &obd->u.lov;
 449         ENTRY;
 450
 451         down_read(&lov->lov_notify_lock);
 452         if (!lov->lov_connects) {
 453                 up_read(&lov->lov_notify_lock);
 454                 RETURN(rc);
 455         }
 456
 457         if (ev == OBD_NOTIFY_ACTIVE || ev == OBD_NOTIFY_INACTIVE ||
 458             ev == OBD_NOTIFY_ACTIVATE || ev == OBD_NOTIFY_DEACTIVATE) {
 459                 struct obd_uuid *uuid;
 460
 461                 LASSERT(watched);
 462
 463                 if (strcmp(watched->obd_type->typ_name, LUSTRE_OSC_NAME)) {
 464                         up_read(&lov->lov_notify_lock);
 465                         CERROR("unexpected notification of %s %s!\n",
 466                                watched->obd_type->typ_name,
 467                                watched->obd_name);
 468                         RETURN(-EINVAL);
 469                 }
 470                 uuid = &watched->u.cli.cl_target_uuid;
 471
 472                 /* Set OSC as active before notifying the observer, so the
 473                  * observer can use the OSC normally.
 474                  */
 475                 rc = lov_set_osc_active(obd, uuid, ev);
 476                 if (rc < 0) {
 477                         up_read(&lov->lov_notify_lock);
 478                         CERROR("event(%d) of %s failed: %d\n", ev,
 479                                obd_uuid2str(uuid), rc);
 480                         RETURN(rc);
 481                 }
 482                 /* active event should be pass lov target index as data */
 483                 data = &rc;
 484         }
 485
 486         /* Pass the notification up the chain. */
 487         if (watched) {
 488                 rc = obd_notify_observer(obd, watched, ev, data);
 489         } else {
 490                 /* NULL watched means all osc's in the lov (only for syncs) */
 491                 /* sync event should be send lov idx as data */
 492                 struct lov_obd *lov = &obd->u.lov;
 493                 int i, is_sync;
 494
 495                 data = &i;
 496                 is_sync = (ev == OBD_NOTIFY_SYNC) ||
 497                           (ev == OBD_NOTIFY_SYNC_NONBLOCK);
 498
 499                 obd_getref(obd);
 500                 for (i = 0; i < lov->desc.ld_tgt_count; i++) {
 501                         if (!lov->lov_tgts[i])
 502                                 continue;
 503
 504                         /* don't send sync event if target not
 505                          * connected/activated */
 506                         if (is_sync &&  !lov->lov_tgts[i]->ltd_active)
 507                                 continue;
 508
 509                         rc = obd_notify_observer(obd, lov->lov_tgts[i]->ltd_obd,
 510                                                  ev, data);
 511                         if (rc) {
 512                                 CERROR("%s: notify %s of %s failed %d\n",
 513                                        obd->obd_name,
 514                                        obd->obd_observer->obd_name,
 515                                        lov->lov_tgts[i]->ltd_obd->obd_name,
 516                                        rc);
 517                         }
 518                 }
 519                 obd_putref(obd);
 520         }
 521
 522         up_read(&lov->lov_notify_lock);
 523         RETURN(rc);
 524 }
 525
 526 static int lov_add_target(struct obd_device *obd, struct obd_uuid *uuidp,
 527                           __u32 index, int gen, int active)
 528 {
 529         struct lov_obd *lov = &obd->u.lov;
 530         struct lov_tgt_desc *tgt;
 531         struct obd_device *tgt_obd;
 532         int rc;
 533         ENTRY;
 534
 535         CDEBUG(D_CONFIG, "uuid:%s idx:%d gen:%d active:%d\n",
 536                uuidp->uuid, index, gen, active);
 537
 538         if (gen <= 0) {
 539                 CERROR("request to add OBD %s with invalid generation: %d\n",
 540                        uuidp->uuid, gen);
 541                 RETURN(-EINVAL);
 542         }
 543
 544         tgt_obd = class_find_client_obd(uuidp, LUSTRE_OSC_NAME,
 545                                         &obd->obd_uuid);
 546         if (tgt_obd == NULL)
 547                 RETURN(-EINVAL);
 548
 549         mutex_lock(&lov->lov_lock);
 550
 551         if ((index < lov->lov_tgt_size) && (lov->lov_tgts[index] != NULL)) {
 552                 tgt = lov->lov_tgts[index];
 553                 CERROR("UUID %s already assigned at LOV target index %d\n",
 554                        obd_uuid2str(&tgt->ltd_uuid), index);
 555                 mutex_unlock(&lov->lov_lock);
 556                 RETURN(-EEXIST);
 557         }
 558
 559         if (index >= lov->lov_tgt_size) {
 560                 /* We need to reallocate the lov target array. */
 561                 struct lov_tgt_desc **newtgts, **old = NULL;
 562                 __u32 newsize, oldsize = 0;
 563
 564                 newsize = max(lov->lov_tgt_size, (__u32)2);
 565                 while (newsize < index + 1)
 566                         newsize = newsize << 1;
 567                 OBD_ALLOC(newtgts, sizeof(*newtgts) * newsize);
 568                 if (newtgts == NULL) {
 569                         mutex_unlock(&lov->lov_lock);
 570                         RETURN(-ENOMEM);
 571                 }
 572
 573                 if (lov->lov_tgt_size) {
 574                         memcpy(newtgts, lov->lov_tgts, sizeof(*newtgts) *
 575                                lov->lov_tgt_size);
 576                         old = lov->lov_tgts;
 577                         oldsize = lov->lov_tgt_size;
 578                 }
 579
 580                 lov->lov_tgts = newtgts;
 581                 lov->lov_tgt_size = newsize;
 582                 smp_rmb();
 583                 if (old)
 584                         OBD_FREE(old, sizeof(*old) * oldsize);
 585
 586                 CDEBUG(D_CONFIG, "tgts: %p size: %d\n",
 587                        lov->lov_tgts, lov->lov_tgt_size);
 588         }
 589
 590         OBD_ALLOC_PTR(tgt);
 591         if (!tgt) {
 592                 mutex_unlock(&lov->lov_lock);
 593                 RETURN(-ENOMEM);
 594         }
 595
 596         rc = lov_ost_pool_add(&lov->lov_packed, index, lov->lov_tgt_size);
 597         if (rc) {
 598                 mutex_unlock(&lov->lov_lock);
 599                 OBD_FREE_PTR(tgt);
 600                 RETURN(rc);
 601         }
 602
 603         tgt->ltd_uuid = *uuidp;
 604         tgt->ltd_obd = tgt_obd;
 605         /* XXX - add a sanity check on the generation number. */
 606         tgt->ltd_gen = gen;
 607         tgt->ltd_index = index;
 608         tgt->ltd_activate = active;
 609         lov->lov_tgts[index] = tgt;
 610         if (index >= lov->desc.ld_tgt_count)
 611                 lov->desc.ld_tgt_count = index + 1;
 612
 613         mutex_unlock(&lov->lov_lock);
 614
 615         CDEBUG(D_CONFIG, "idx=%d ltd_gen=%d ld_tgt_count=%d\n",
 616                 index, tgt->ltd_gen, lov->desc.ld_tgt_count);
 617
 618         rc = obd_notify(obd, tgt_obd, OBD_NOTIFY_CREATE, &index);
 619
 620         if (lov->lov_connects == 0) {
 621                 /* lov_connect hasn't been called yet. We'll do the
 622                    lov_connect_obd on this target when that fn first runs,
 623                    because we don't know the connect flags yet. */
 624                 RETURN(0);
 625         }
 626
 627         obd_getref(obd);
 628
 629         rc = lov_connect_obd(obd, index, active, &lov->lov_ocd);
 630         if (rc)
 631                 GOTO(out, rc);
 632
 633         /* connect to administrative disabled ost */
 634         if (!tgt->ltd_exp)
 635                 GOTO(out, rc = 0);
 636
 637         if (lov->lov_cache != NULL) {
 638                 rc = obd_set_info_async(NULL, tgt->ltd_exp,
 639                                 sizeof(KEY_CACHE_SET), KEY_CACHE_SET,
 640                                 sizeof(struct cl_client_cache), lov->lov_cache,
 641                                 NULL);
 642                 if (rc < 0)
 643                         GOTO(out, rc);
 644         }
 645
 646         rc = lov_notify(obd, tgt->ltd_exp->exp_obd,
 647                         active ? OBD_NOTIFY_CONNECT : OBD_NOTIFY_INACTIVE,
 648                         (void *)&index);
 649
 650 out:
 651         if (rc) {
 652                 CERROR("add failed (%d), deleting %s\n", rc,
 653                        obd_uuid2str(&tgt->ltd_uuid));
 654                 lov_del_target(obd, index, 0, 0);
 655         }
 656         obd_putref(obd);
 657         RETURN(rc);
 658 }
 659
 660 /* Schedule a target for deletion */
 661 int lov_del_target(struct obd_device *obd, __u32 index,
 662                    struct obd_uuid *uuidp, int gen)
 663 {
 664         struct lov_obd *lov = &obd->u.lov;
 665         int count = lov->desc.ld_tgt_count;
 666         int rc = 0;
 667         ENTRY;
 668
 669         if (index >= count) {
 670                 CERROR("LOV target index %d >= number of LOV OBDs %d.\n",
 671                        index, count);
 672                 RETURN(-EINVAL);
 673         }
 674
 675         /* to make sure there's no ongoing lov_notify() now */
 676         down_write(&lov->lov_notify_lock);
 677         obd_getref(obd);
 678
 679         if (!lov->lov_tgts[index]) {
 680                 CERROR("LOV target at index %d is not setup.\n", index);
 681                 GOTO(out, rc = -EINVAL);
 682         }
 683
 684         if (uuidp && !obd_uuid_equals(uuidp, &lov->lov_tgts[index]->ltd_uuid)) {
 685                 CERROR("LOV target UUID %s at index %d doesn't match %s.\n",
 686                        lov_uuid2str(lov, index), index,
 687                        obd_uuid2str(uuidp));
 688                 GOTO(out, rc = -EINVAL);
 689         }
 690
 691         CDEBUG(D_CONFIG, "uuid: %s idx: %d gen: %d exp: %p active: %d\n",
 692                lov_uuid2str(lov, index), index,
 693                lov->lov_tgts[index]->ltd_gen, lov->lov_tgts[index]->ltd_exp,
 694                lov->lov_tgts[index]->ltd_active);
 695
 696         lov->lov_tgts[index]->ltd_reap = 1;
 697         lov->lov_death_row++;
 698         /* we really delete it from obd_putref */
 699 out:
 700         obd_putref(obd);
 701         up_write(&lov->lov_notify_lock);
 702
 703         RETURN(rc);
 704 }
 705
 706 static void __lov_del_obd(struct obd_device *obd, struct lov_tgt_desc *tgt)
 707 {
 708         struct obd_device *osc_obd;
 709
 710         LASSERT(tgt);
 711         LASSERT(tgt->ltd_reap);
 712
 713         osc_obd = class_exp2obd(tgt->ltd_exp);
 714
 715         CDEBUG(D_CONFIG, "Removing tgt %s : %s\n",
 716                tgt->ltd_uuid.uuid,
 717                osc_obd ? osc_obd->obd_name : "<no obd>");
 718
 719         if (tgt->ltd_exp)
 720                 lov_disconnect_obd(obd, tgt);
 721
 722         OBD_FREE_PTR(tgt);
 723
 724         /* Manual cleanup - no cleanup logs to clean up the osc's.  We must
 725            do it ourselves. And we can't do it from lov_cleanup,
 726            because we just lost our only reference to it. */
 727         if (osc_obd)
 728                 class_manual_cleanup(osc_obd);
 729 }
 730
 731 void lov_fix_desc_stripe_size(__u64 *val)
 732 {
 733         if (*val < LOV_MIN_STRIPE_SIZE) {
 734                 if (*val != 0)
 735                         LCONSOLE_INFO("Increasing default stripe size to "
 736                                       "minimum %u\n",
 737                                       LOV_DEFAULT_STRIPE_SIZE);
 738                 *val = LOV_DEFAULT_STRIPE_SIZE;
 739         } else if (*val & (LOV_MIN_STRIPE_SIZE - 1)) {
 740                 *val &= ~(LOV_MIN_STRIPE_SIZE - 1);
 741                 LCONSOLE_WARN("Changing default stripe size to "LPU64" (a "
 742                               "multiple of %u)\n",
 743                               *val, LOV_MIN_STRIPE_SIZE);
 744         }
 745 }
 746
 747 void lov_fix_desc_stripe_count(__u32 *val)
 748 {
 749         if (*val == 0)
 750                 *val = 1;
 751 }
 752
 753 void lov_fix_desc_pattern(__u32 *val)
 754 {
 755         /* from lov_setstripe */
 756         if ((*val != 0) && (*val != LOV_PATTERN_RAID0)) {
 757                 LCONSOLE_WARN("Unknown stripe pattern: %#x\n", *val);
 758                 *val = 0;
 759         }
 760 }
 761
 762 void lov_fix_desc_qos_maxage(__u32 *val)
 763 {
 764         /* fix qos_maxage */
 765         if (*val == 0)
 766                 *val = QOS_DEFAULT_MAXAGE;
 767 }
 768
 769 void lov_fix_desc(struct lov_desc *desc)
 770 {
 771         lov_fix_desc_stripe_size(&desc->ld_default_stripe_size);
 772         lov_fix_desc_stripe_count(&desc->ld_default_stripe_count);
 773         lov_fix_desc_pattern(&desc->ld_pattern);
 774         lov_fix_desc_qos_maxage(&desc->ld_qos_maxage);
 775 }
 776
 777 int lov_setup(struct obd_device *obd, struct lustre_cfg *lcfg)
 778 {
 779         struct lprocfs_static_vars lvars = { 0 };
 780         struct lov_desc *desc;
 781         struct lov_obd *lov = &obd->u.lov;
 782         int rc;
 783         ENTRY;
 784
 785         if (LUSTRE_CFG_BUFLEN(lcfg, 1) < 1) {
 786                 CERROR("LOV setup requires a descriptor\n");
 787                 RETURN(-EINVAL);
 788         }
 789
 790         desc = (struct lov_desc *)lustre_cfg_buf(lcfg, 1);
 791
 792         if (sizeof(*desc) > LUSTRE_CFG_BUFLEN(lcfg, 1)) {
 793                 CERROR("descriptor size wrong: %d > %d\n",
 794                        (int)sizeof(*desc), LUSTRE_CFG_BUFLEN(lcfg, 1));
 795                 RETURN(-EINVAL);
 796         }
 797
 798         if (desc->ld_magic != LOV_DESC_MAGIC) {
 799                 if (desc->ld_magic == __swab32(LOV_DESC_MAGIC)) {
 800                             CDEBUG(D_OTHER, "%s: Swabbing lov desc %p\n",
 801                                    obd->obd_name, desc);
 802                             lustre_swab_lov_desc(desc);
 803                 } else {
 804                         CERROR("%s: Bad lov desc magic: %#x\n",
 805                                obd->obd_name, desc->ld_magic);
 806                         RETURN(-EINVAL);
 807                 }
 808         }
 809
 810         lov_fix_desc(desc);
 811
 812         desc->ld_active_tgt_count = 0;
 813         lov->desc = *desc;
 814         lov->lov_tgt_size = 0;
 815
 816         mutex_init(&lov->lov_lock);
 817         atomic_set(&lov->lov_refcount, 0);
 818         lov->lov_sp_me = LUSTRE_SP_CLI;
 819
 820         init_rwsem(&lov->lov_notify_lock);
 821
 822         lov->lov_pools_hash_body = cfs_hash_create("POOLS", HASH_POOLS_CUR_BITS,
 823                                                    HASH_POOLS_MAX_BITS,
 824                                                    HASH_POOLS_BKT_BITS, 0,
 825                                                    CFS_HASH_MIN_THETA,
 826                                                    CFS_HASH_MAX_THETA,
 827                                                    &pool_hash_operations,
 828                                                    CFS_HASH_DEFAULT);
 829         INIT_LIST_HEAD(&lov->lov_pool_list);
 830         lov->lov_pool_count = 0;
 831         rc = lov_ost_pool_init(&lov->lov_packed, 0);
 832         if (rc)
 833                 GOTO(out, rc);
 834
 835         lprocfs_lov_init_vars(&lvars);
 836         lprocfs_obd_setup(obd, lvars.obd_vars);
 837 #ifdef LPROCFS
 838         {
 839                 int rc;
 840
 841                 rc = lprocfs_seq_create(obd->obd_proc_entry, "target_obd",
 842                                         0444, &lov_proc_target_fops, obd);
 843                 if (rc)
 844                         CWARN("Error adding the target_obd file\n");
 845         }
 846 #endif
 847         lov->lov_pool_proc_entry = lprocfs_register("pools",
 848                                                     obd->obd_proc_entry,
 849                                                     NULL, NULL);
 850
 851         RETURN(0);
 852
 853 out:
 854         return rc;
 855 }
 856
 857 static int lov_precleanup(struct obd_device *obd, enum obd_cleanup_stage stage)
 858 {
 859         int rc = 0;
 860         struct lov_obd *lov = &obd->u.lov;
 861
 862         ENTRY;
 863
 864         switch (stage) {
 865         case OBD_CLEANUP_EARLY: {
 866                 int i;
 867                 for (i = 0; i < lov->desc.ld_tgt_count; i++) {
 868                         if (!lov->lov_tgts[i] || !lov->lov_tgts[i]->ltd_active)
 869                                 continue;
 870                         obd_precleanup(class_exp2obd(lov->lov_tgts[i]->ltd_exp),
 871                                        OBD_CLEANUP_EARLY);
 872                 }
 873                 break;
 874         }
 875         case OBD_CLEANUP_EXPORTS:
 876                 rc = obd_llog_finish(obd, 0);
 877                 if (rc != 0)
 878                         CERROR("failed to cleanup llogging subsystems\n");
 879                 break;
 880         }
 881         RETURN(rc);
 882 }
 883
 884 static int lov_cleanup(struct obd_device *obd)
 885 {
 886         struct lov_obd *lov = &obd->u.lov;
 887         struct list_head *pos, *tmp;
 888         struct pool_desc *pool;
 889         ENTRY;
 890
 891         list_for_each_safe(pos, tmp, &lov->lov_pool_list) {
 892                 pool = list_entry(pos, struct pool_desc, pool_list);
 893                 /* free pool structs */
 894                 CDEBUG(D_INFO, "delete pool %p\n", pool);
 895                 /* In the function below, .hs_keycmp resolves to
 896                  * pool_hashkey_keycmp() */
 897                 /* coverity[overrun-buffer-val] */
 898                 lov_pool_del(obd, pool->pool_name);
 899         }
 900         cfs_hash_putref(lov->lov_pools_hash_body);
 901         lov_ost_pool_free(&lov->lov_packed);
 902
 903         lprocfs_obd_cleanup(obd);
 904         if (lov->lov_tgts) {
 905                 int i;
 906                 obd_getref(obd);
 907                 for (i = 0; i < lov->desc.ld_tgt_count; i++) {
 908                         if (!lov->lov_tgts[i])
 909                                 continue;
 910
 911                         /* Inactive targets may never have connected */
 912                         if (lov->lov_tgts[i]->ltd_active ||
 913                             atomic_read(&lov->lov_refcount))
 914                             /* We should never get here - these
 915                                should have been removed in the
 916                              disconnect. */
 917                                 CERROR("lov tgt %d not cleaned!"
 918                                        " deathrow=%d, lovrc=%d\n",
 919                                        i, lov->lov_death_row,
 920                                        atomic_read(&lov->lov_refcount));
 921                         lov_del_target(obd, i, 0, 0);
 922                 }
 923                 obd_putref(obd);
 924                 OBD_FREE(lov->lov_tgts, sizeof(*lov->lov_tgts) *
 925                          lov->lov_tgt_size);
 926                 lov->lov_tgt_size = 0;
 927         }
 928         RETURN(0);
 929 }
 930
 931 int lov_process_config_base(struct obd_device *obd, struct lustre_cfg *lcfg,
 932                             __u32 *indexp, int *genp)
 933 {
 934         struct obd_uuid obd_uuid;
 935         int cmd;
 936         int rc = 0;
 937         ENTRY;
 938
 939         switch(cmd = lcfg->lcfg_command) {
 940         case LCFG_LOV_ADD_OBD:
 941         case LCFG_LOV_ADD_INA:
 942         case LCFG_LOV_DEL_OBD: {
 943                 __u32 index;
 944                 int gen;
 945                 /* lov_modify_tgts add  0:lov_mdsA  1:ost1_UUID  2:0  3:1 */
 946                 if (LUSTRE_CFG_BUFLEN(lcfg, 1) > sizeof(obd_uuid.uuid))
 947                         GOTO(out, rc = -EINVAL);
 948
 949                 obd_str2uuid(&obd_uuid,  lustre_cfg_buf(lcfg, 1));
 950
 951                 if (sscanf(lustre_cfg_buf(lcfg, 2), "%d", indexp) != 1)
 952                         GOTO(out, rc = -EINVAL);
 953                 if (sscanf(lustre_cfg_buf(lcfg, 3), "%d", genp) != 1)
 954                         GOTO(out, rc = -EINVAL);
 955                 index = *indexp;
 956                 gen = *genp;
 957                 if (cmd == LCFG_LOV_ADD_OBD)
 958                         rc = lov_add_target(obd, &obd_uuid, index, gen, 1);
 959                 else if (cmd == LCFG_LOV_ADD_INA)
 960                         rc = lov_add_target(obd, &obd_uuid, index, gen, 0);
 961                 else
 962                         rc = lov_del_target(obd, index, &obd_uuid, gen);
 963                 GOTO(out, rc);
 964         }
 965         case LCFG_PARAM: {
 966                 struct lprocfs_static_vars lvars = { 0 };
 967                 struct lov_desc *desc = &(obd->u.lov.desc);
 968
 969                 if (!desc)
 970                         GOTO(out, rc = -EINVAL);
 971
 972                 lprocfs_lov_init_vars(&lvars);
 973
 974                 rc = class_process_proc_param(PARAM_LOV, lvars.obd_vars,
 975                                               lcfg, obd);
 976                 if (rc > 0)
 977                         rc = 0;
 978                 GOTO(out, rc);
 979         }
 980         case LCFG_POOL_NEW:
 981         case LCFG_POOL_ADD:
 982         case LCFG_POOL_DEL:
 983         case LCFG_POOL_REM:
 984                 GOTO(out, rc);
 985
 986         default: {
 987                 CERROR("Unknown command: %d\n", lcfg->lcfg_command);
 988                 GOTO(out, rc = -EINVAL);
 989
 990         }
 991         }
 992 out:
 993         RETURN(rc);
 994 }
 995
 996 static int lov_recreate(struct obd_export *exp, struct obdo *src_oa,
 997                         struct lov_stripe_md **ea, struct obd_trans_info *oti)
 998 {
 999         struct lov_stripe_md *obj_mdp, *lsm;
1000         struct lov_obd *lov = &exp->exp_obd->u.lov;
1001         unsigned ost_idx;
1002         int rc, i;
1003         ENTRY;
1004
1005         LASSERT(src_oa->o_valid & OBD_MD_FLFLAGS &&
1006                 src_oa->o_flags & OBD_FL_RECREATE_OBJS);
1007
1008         OBD_ALLOC(obj_mdp, sizeof(*obj_mdp));
1009         if (obj_mdp == NULL)
1010                 RETURN(-ENOMEM);
1011
1012         ost_idx = src_oa->o_nlink;
1013         lsm = *ea;
1014         if (lsm == NULL)
1015                 GOTO(out, rc = -EINVAL);
1016         if (ost_idx >= lov->desc.ld_tgt_count ||
1017             !lov->lov_tgts[ost_idx])
1018                 GOTO(out, rc = -EINVAL);
1019
1020         for (i = 0; i < lsm->lsm_stripe_count; i++) {
1021                 if (lsm->lsm_oinfo[i]->loi_ost_idx == ost_idx) {
1022                         if (ostid_id(&lsm->lsm_oinfo[i]->loi_oi) !=
1023                                         ostid_id(&src_oa->o_oi))
1024                                 GOTO(out, rc = -EINVAL);
1025                         break;
1026                 }
1027         }
1028         if (i == lsm->lsm_stripe_count)
1029                 GOTO(out, rc = -EINVAL);
1030
1031         rc = obd_create(NULL, lov->lov_tgts[ost_idx]->ltd_exp,
1032                         src_oa, &obj_mdp, oti);
1033 out:
1034         OBD_FREE(obj_mdp, sizeof(*obj_mdp));
1035         RETURN(rc);
1036 }
1037
1038 /* the LOV expects oa->o_id to be set to the LOV object id */
1039 static int lov_create(const struct lu_env *env, struct obd_export *exp,
1040                       struct obdo *src_oa, struct lov_stripe_md **ea,
1041                       struct obd_trans_info *oti)
1042 {
1043         struct lov_obd *lov;
1044         int rc = 0;
1045         ENTRY;
1046
1047         LASSERT(ea != NULL);
1048         if (exp == NULL)
1049                 RETURN(-EINVAL);
1050
1051         if ((src_oa->o_valid & OBD_MD_FLFLAGS) &&
1052             src_oa->o_flags == OBD_FL_DELORPHAN) {
1053                 /* should be used with LOV anymore */
1054                 LBUG();
1055         }
1056
1057         lov = &exp->exp_obd->u.lov;
1058         if (!lov->desc.ld_active_tgt_count)
1059                 RETURN(-EIO);
1060
1061         obd_getref(exp->exp_obd);
1062         /* Recreate a specific object id at the given OST index */
1063         if ((src_oa->o_valid & OBD_MD_FLFLAGS) &&
1064             (src_oa->o_flags & OBD_FL_RECREATE_OBJS)) {
1065                  rc = lov_recreate(exp, src_oa, ea, oti);
1066         }
1067
1068         obd_putref(exp->exp_obd);
1069         RETURN(rc);
1070 }
1071
1072 #define ASSERT_LSM_MAGIC(lsmp)                                            \
1073 do {                                                                        \
1074         LASSERT((lsmp) != NULL);                                                \
1075         LASSERTF(((lsmp)->lsm_magic == LOV_MAGIC_V1 ||                    \
1076                  (lsmp)->lsm_magic == LOV_MAGIC_V3),                        \
1077                  "%p->lsm_magic=%x\n", (lsmp), (lsmp)->lsm_magic);            \
1078 } while (0)
1079
1080 static int lov_destroy(const struct lu_env *env, struct obd_export *exp,
1081                        struct obdo *oa, struct lov_stripe_md *lsm,
1082                        struct obd_trans_info *oti, struct obd_export *md_exp,
1083                        void *capa)
1084 {
1085         struct lov_request_set *set;
1086         struct obd_info oinfo;
1087         struct lov_request *req;
1088         struct list_head *pos;
1089         struct lov_obd *lov;
1090         int rc = 0, err = 0;
1091         ENTRY;
1092
1093         ASSERT_LSM_MAGIC(lsm);
1094
1095         if (!exp || !exp->exp_obd)
1096                 RETURN(-ENODEV);
1097
1098         if (oa->o_valid & OBD_MD_FLCOOKIE) {
1099                 LASSERT(oti);
1100                 LASSERT(oti->oti_logcookies);
1101         }
1102
1103         lov = &exp->exp_obd->u.lov;
1104         obd_getref(exp->exp_obd);
1105         rc = lov_prep_destroy_set(exp, &oinfo, oa, lsm, oti, &set);
1106         if (rc)
1107                 GOTO(out, rc);
1108
1109         list_for_each (pos, &set->set_list) {
1110                 req = list_entry(pos, struct lov_request, rq_link);
1111
1112                 if (oa->o_valid & OBD_MD_FLCOOKIE)
1113                         oti->oti_logcookies = set->set_cookies + req->rq_stripe;
1114
1115                 err = obd_destroy(env, lov->lov_tgts[req->rq_idx]->ltd_exp,
1116                                   req->rq_oi.oi_oa, NULL, oti, NULL, capa);
1117                 err = lov_update_common_set(set, req, err);
1118                 if (err) {
1119                         CERROR("%s: destroying objid "DOSTID" subobj "
1120                                DOSTID" on OST idx %d: rc = %d\n",
1121                                exp->exp_obd->obd_name, POSTID(&oa->o_oi),
1122                                POSTID(&req->rq_oi.oi_oa->o_oi),
1123                                req->rq_idx, err);
1124                         if (!rc)
1125                                 rc = err;
1126                 }
1127         }
1128
1129         if (rc == 0) {
1130                 LASSERT(lsm_op_find(lsm->lsm_magic) != NULL);
1131                 rc = lsm_op_find(lsm->lsm_magic)->lsm_destroy(lsm, oa, md_exp);
1132         }
1133         err = lov_fini_destroy_set(set);
1134 out:
1135         obd_putref(exp->exp_obd);
1136         RETURN(rc ? rc : err);
1137 }
1138
1139 static int lov_getattr(const struct lu_env *env, struct obd_export *exp,
1140                        struct obd_info *oinfo)
1141 {
1142         struct lov_request_set *set;
1143         struct lov_request *req;
1144         struct list_head *pos;
1145         struct lov_obd *lov;
1146         int err = 0, rc = 0;
1147         ENTRY;
1148
1149         LASSERT(oinfo);
1150         ASSERT_LSM_MAGIC(oinfo->oi_md);
1151
1152         if (!exp || !exp->exp_obd)
1153                 RETURN(-ENODEV);
1154
1155         lov = &exp->exp_obd->u.lov;
1156
1157         rc = lov_prep_getattr_set(exp, oinfo, &set);
1158         if (rc)
1159                 RETURN(rc);
1160
1161         list_for_each (pos, &set->set_list) {
1162                 req = list_entry(pos, struct lov_request, rq_link);
1163
1164                 CDEBUG(D_INFO, "objid "DOSTID"[%d] has subobj "DOSTID" at idx"
1165                        " %u\n", POSTID(&oinfo->oi_oa->o_oi), req->rq_stripe,
1166                        POSTID(&req->rq_oi.oi_oa->o_oi), req->rq_idx);
1167
1168                 rc = obd_getattr(env, lov->lov_tgts[req->rq_idx]->ltd_exp,
1169                                  &req->rq_oi);
1170                 err = lov_update_common_set(set, req, rc);
1171                 if (err) {
1172                         CERROR("%s: getattr objid "DOSTID" subobj "
1173                                DOSTID" on OST idx %d: rc = %d\n",
1174                                exp->exp_obd->obd_name,
1175                                POSTID(&oinfo->oi_oa->o_oi),
1176                                POSTID(&req->rq_oi.oi_oa->o_oi),
1177                                req->rq_idx, err);
1178                         break;
1179                 }
1180         }
1181
1182         rc = lov_fini_getattr_set(set);
1183         if (err)
1184                 rc = err;
1185         RETURN(rc);
1186 }
1187
1188 static int lov_getattr_interpret(struct ptlrpc_request_set *rqset,
1189                                  void *data, int rc)
1190 {
1191         struct lov_request_set *lovset = (struct lov_request_set *)data;
1192         int err;
1193         ENTRY;
1194
1195         /* don't do attribute merge if this aysnc op failed */
1196         if (rc)
1197                 atomic_set(&lovset->set_completes, 0);
1198         err = lov_fini_getattr_set(lovset);
1199         RETURN(rc ? rc : err);
1200 }
1201
1202 static int lov_getattr_async(struct obd_export *exp, struct obd_info *oinfo,
1203                               struct ptlrpc_request_set *rqset)
1204 {
1205         struct lov_request_set *lovset;
1206         struct lov_obd *lov;
1207         struct list_head *pos;
1208         struct lov_request *req;
1209         int rc = 0, err;
1210         ENTRY;
1211
1212         LASSERT(oinfo);
1213         ASSERT_LSM_MAGIC(oinfo->oi_md);
1214
1215         if (!exp || !exp->exp_obd)
1216                 RETURN(-ENODEV);
1217
1218         lov = &exp->exp_obd->u.lov;
1219
1220         rc = lov_prep_getattr_set(exp, oinfo, &lovset);
1221         if (rc)
1222                 RETURN(rc);
1223
1224         CDEBUG(D_INFO, "objid "DOSTID": %ux%u byte stripes\n",
1225                POSTID(&oinfo->oi_md->lsm_oi), oinfo->oi_md->lsm_stripe_count,
1226                oinfo->oi_md->lsm_stripe_size);
1227
1228         list_for_each(pos, &lovset->set_list) {
1229                 req = list_entry(pos, struct lov_request, rq_link);
1230
1231                 CDEBUG(D_INFO, "objid "DOSTID"[%d] has subobj "DOSTID" at idx"
1232                        "%u\n", POSTID(&oinfo->oi_oa->o_oi), req->rq_stripe,
1233                        POSTID(&req->rq_oi.oi_oa->o_oi), req->rq_idx);
1234                 rc = obd_getattr_async(lov->lov_tgts[req->rq_idx]->ltd_exp,
1235                                        &req->rq_oi, rqset);
1236                 if (rc) {
1237                         CERROR("%s: getattr objid "DOSTID" subobj"
1238                                DOSTID" on OST idx %d: rc = %d\n",
1239                                exp->exp_obd->obd_name,
1240                                POSTID(&oinfo->oi_oa->o_oi),
1241                                POSTID(&req->rq_oi.oi_oa->o_oi),
1242                                req->rq_idx, rc);
1243                         GOTO(out, rc);
1244                 }
1245         }
1246
1247         if (!list_empty(&rqset->set_requests)) {
1248                 LASSERT(rc == 0);
1249                 LASSERT (rqset->set_interpret == NULL);
1250                 rqset->set_interpret = lov_getattr_interpret;
1251                 rqset->set_arg = (void *)lovset;
1252                 RETURN(rc);
1253         }
1254 out:
1255         if (rc)
1256                 atomic_set(&lovset->set_completes, 0);
1257         err = lov_fini_getattr_set(lovset);
1258         RETURN(rc ? rc : err);
1259 }
1260
1261 static int lov_setattr(const struct lu_env *env, struct obd_export *exp,
1262                        struct obd_info *oinfo, struct obd_trans_info *oti)
1263 {
1264         struct lov_request_set *set;
1265         struct lov_obd *lov;
1266         struct list_head *pos;
1267         struct lov_request *req;
1268         int err = 0, rc = 0;
1269         ENTRY;
1270
1271         LASSERT(oinfo);
1272         ASSERT_LSM_MAGIC(oinfo->oi_md);
1273
1274         if (!exp || !exp->exp_obd)
1275                 RETURN(-ENODEV);
1276
1277         /* for now, we only expect the following updates here */
1278         LASSERT(!(oinfo->oi_oa->o_valid & ~(OBD_MD_FLID | OBD_MD_FLTYPE |
1279                                             OBD_MD_FLMODE | OBD_MD_FLATIME |
1280                                             OBD_MD_FLMTIME | OBD_MD_FLCTIME |
1281                                             OBD_MD_FLFLAGS | OBD_MD_FLSIZE |
1282                                             OBD_MD_FLGROUP | OBD_MD_FLUID |
1283                                             OBD_MD_FLGID | OBD_MD_FLFID |
1284                                             OBD_MD_FLGENER)));
1285         lov = &exp->exp_obd->u.lov;
1286         rc = lov_prep_setattr_set(exp, oinfo, oti, &set);
1287         if (rc)
1288                 RETURN(rc);
1289
1290         list_for_each (pos, &set->set_list) {
1291                 req = list_entry(pos, struct lov_request, rq_link);
1292
1293                 rc = obd_setattr(env, lov->lov_tgts[req->rq_idx]->ltd_exp,
1294                                  &req->rq_oi, NULL);
1295                 err = lov_update_setattr_set(set, req, rc);
1296                 if (err) {
1297                         CERROR("%s: setattr objid "DOSTID" subobj "
1298                                DOSTID" on OST idx %d: rc = %d\n",
1299                                exp->exp_obd->obd_name,
1300                                POSTID(&set->set_oi->oi_oa->o_oi),
1301                                POSTID(&req->rq_oi.oi_oa->o_oi), req->rq_idx,
1302                                err);
1303                         if (!rc)
1304                                 rc = err;
1305                 }
1306         }
1307         err = lov_fini_setattr_set(set);
1308         if (!rc)
1309                 rc = err;
1310         RETURN(rc);
1311 }
1312
1313 static int lov_setattr_interpret(struct ptlrpc_request_set *rqset,
1314                                  void *data, int rc)
1315 {
1316         struct lov_request_set *lovset = (struct lov_request_set *)data;
1317         int err;
1318         ENTRY;
1319
1320         if (rc)
1321                 atomic_set(&lovset->set_completes, 0);
1322         err = lov_fini_setattr_set(lovset);
1323         RETURN(rc ? rc : err);
1324 }
1325
1326 /* If @oti is given, the request goes from MDS and responses from OSTs are not
1327    needed. Otherwise, a client is waiting for responses. */
1328 static int lov_setattr_async(struct obd_export *exp, struct obd_info *oinfo,
1329                              struct obd_trans_info *oti,
1330                              struct ptlrpc_request_set *rqset)
1331 {
1332         struct lov_request_set *set;
1333         struct lov_request *req;
1334         struct list_head *pos;
1335         struct lov_obd *lov;
1336         int rc = 0;
1337         ENTRY;
1338
1339         LASSERT(oinfo);
1340         ASSERT_LSM_MAGIC(oinfo->oi_md);
1341         if (oinfo->oi_oa->o_valid & OBD_MD_FLCOOKIE) {
1342                 LASSERT(oti);
1343                 LASSERT(oti->oti_logcookies);
1344         }
1345
1346         if (!exp || !exp->exp_obd)
1347                 RETURN(-ENODEV);
1348
1349         lov = &exp->exp_obd->u.lov;
1350         rc = lov_prep_setattr_set(exp, oinfo, oti, &set);
1351         if (rc)
1352                 RETURN(rc);
1353
1354         CDEBUG(D_INFO, "objid "DOSTID": %ux%u byte stripes\n",
1355                POSTID(&oinfo->oi_md->lsm_oi),
1356                oinfo->oi_md->lsm_stripe_count,
1357                oinfo->oi_md->lsm_stripe_size);
1358
1359         list_for_each(pos, &set->set_list) {
1360                 req = list_entry(pos, struct lov_request, rq_link);
1361
1362                 if (oinfo->oi_oa->o_valid & OBD_MD_FLCOOKIE)
1363                         oti->oti_logcookies = set->set_cookies + req->rq_stripe;
1364
1365                 CDEBUG(D_INFO, "objid "DOSTID"[%d] has subobj "DOSTID" at idx"
1366                        "%u\n", POSTID(&oinfo->oi_oa->o_oi), req->rq_stripe,
1367                        POSTID(&req->rq_oi.oi_oa->o_oi), req->rq_idx);
1368
1369                 rc = obd_setattr_async(lov->lov_tgts[req->rq_idx]->ltd_exp,
1370                                        &req->rq_oi, oti, rqset);
1371                 if (rc) {
1372                         CERROR("error: setattr objid "DOSTID" subobj"
1373                                DOSTID" on OST idx %d: rc = %d\n",
1374                                POSTID(&set->set_oi->oi_oa->o_oi),
1375                                POSTID(&req->rq_oi.oi_oa->o_oi),
1376                                req->rq_idx, rc);
1377                         break;
1378                 }
1379         }
1380
1381         /* If we are not waiting for responses on async requests, return. */
1382         if (rc || !rqset || list_empty(&rqset->set_requests)) {
1383                 int err;
1384                 if (rc)
1385                         atomic_set(&set->set_completes, 0);
1386                 err = lov_fini_setattr_set(set);
1387                 RETURN(rc ? rc : err);
1388         }
1389
1390         LASSERT(rqset->set_interpret == NULL);
1391         rqset->set_interpret = lov_setattr_interpret;
1392         rqset->set_arg = (void *)set;
1393
1394         RETURN(0);
1395 }
1396
1397 static int lov_punch_interpret(struct ptlrpc_request_set *rqset,
1398                                void *data, int rc)
1399 {
1400         struct lov_request_set *lovset = (struct lov_request_set *)data;
1401         int err;
1402         ENTRY;
1403
1404         if (rc)
1405                 atomic_set(&lovset->set_completes, 0);
1406         err = lov_fini_punch_set(lovset);
1407         RETURN(rc ? rc : err);
1408 }
1409
1410 /* FIXME: maybe we'll just make one node the authoritative attribute node, then
1411  * we can send this 'punch' to just the authoritative node and the nodes
1412  * that the punch will affect. */
1413 static int lov_punch(const struct lu_env *env, struct obd_export *exp,
1414                      struct obd_info *oinfo, struct obd_trans_info *oti,
1415                      struct ptlrpc_request_set *rqset)
1416 {
1417         struct lov_request_set *set;
1418         struct lov_obd *lov;
1419         struct list_head *pos;
1420         struct lov_request *req;
1421         int rc = 0;
1422         ENTRY;
1423
1424         LASSERT(oinfo);
1425         ASSERT_LSM_MAGIC(oinfo->oi_md);
1426
1427         if (!exp || !exp->exp_obd)
1428                 RETURN(-ENODEV);
1429
1430         lov = &exp->exp_obd->u.lov;
1431         rc = lov_prep_punch_set(exp, oinfo, oti, &set);
1432         if (rc)
1433                 RETURN(rc);
1434
1435         list_for_each (pos, &set->set_list) {
1436                 req = list_entry(pos, struct lov_request, rq_link);
1437
1438                 rc = obd_punch(env, lov->lov_tgts[req->rq_idx]->ltd_exp,
1439                                &req->rq_oi, NULL, rqset);
1440                 if (rc) {
1441                         CERROR("%s: punch objid "DOSTID" subobj "DOSTID
1442                                " on OST idx %d: rc = %d\n",
1443                                exp->exp_obd->obd_name,
1444                                POSTID(&set->set_oi->oi_oa->o_oi),
1445                                POSTID(&req->rq_oi.oi_oa->o_oi), req->rq_idx, rc);
1446                         break;
1447                 }
1448         }
1449
1450         if (rc || list_empty(&rqset->set_requests)) {
1451                 int err;
1452                 err = lov_fini_punch_set(set);
1453                 RETURN(rc ? rc : err);
1454         }
1455
1456         LASSERT(rqset->set_interpret == NULL);
1457         rqset->set_interpret = lov_punch_interpret;
1458         rqset->set_arg = (void *)set;
1459
1460         RETURN(0);
1461 }
1462
1463 static int lov_sync_interpret(struct ptlrpc_request_set *rqset,
1464                               void *data, int rc)
1465 {
1466         struct lov_request_set *lovset = data;
1467         int err;
1468         ENTRY;
1469
1470         if (rc)
1471                 atomic_set(&lovset->set_completes, 0);
1472         err = lov_fini_sync_set(lovset);
1473         RETURN(rc ?: err);
1474 }
1475
1476 static int lov_sync(const struct lu_env *env, struct obd_export *exp,
1477                     struct obd_info *oinfo, obd_off start, obd_off end,
1478                     struct ptlrpc_request_set *rqset)
1479 {
1480         struct lov_request_set *set = NULL;
1481         struct lov_obd *lov;
1482         struct list_head *pos;
1483         struct lov_request *req;
1484         int rc = 0;
1485         ENTRY;
1486
1487         ASSERT_LSM_MAGIC(oinfo->oi_md);
1488         LASSERT(rqset != NULL);
1489
1490         if (!exp->exp_obd)
1491                 RETURN(-ENODEV);
1492
1493         lov = &exp->exp_obd->u.lov;
1494         rc = lov_prep_sync_set(exp, oinfo, start, end, &set);
1495         if (rc)
1496                 RETURN(rc);
1497
1498         CDEBUG(D_INFO, "fsync objid "DOSTID" ["LPX64", "LPX64"]\n",
1499                POSTID(&set->set_oi->oi_oa->o_oi), start, end);
1500
1501         list_for_each (pos, &set->set_list) {
1502                 req = list_entry(pos, struct lov_request, rq_link);
1503
1504                 rc = obd_sync(env, lov->lov_tgts[req->rq_idx]->ltd_exp,
1505                               &req->rq_oi, req->rq_oi.oi_policy.l_extent.start,
1506                               req->rq_oi.oi_policy.l_extent.end, rqset);
1507                 if (rc) {
1508                         CERROR("%s: fsync objid "DOSTID" subobj "DOSTID
1509                                " on OST idx %d: rc = %d\n",
1510                                exp->exp_obd->obd_name,
1511                                POSTID(&set->set_oi->oi_oa->o_oi),
1512                                POSTID(&req->rq_oi.oi_oa->o_oi), req->rq_idx,
1513                                rc);
1514                         break;
1515                 }
1516         }
1517
1518         /* If we are not waiting for responses on async requests, return. */
1519         if (rc || list_empty(&rqset->set_requests)) {
1520                 int err = lov_fini_sync_set(set);
1521
1522                 RETURN(rc ?: err);
1523         }
1524
1525         LASSERT(rqset->set_interpret == NULL);
1526         rqset->set_interpret = lov_sync_interpret;
1527         rqset->set_arg = (void *)set;
1528
1529         RETURN(0);
1530 }
1531
1532 static int lov_brw_check(struct lov_obd *lov, struct obd_info *lov_oinfo,
1533                          obd_count oa_bufs, struct brw_page *pga)
1534 {
1535         struct obd_info oinfo = { { { 0 } } };
1536         int i, rc = 0;
1537
1538         oinfo.oi_oa = lov_oinfo->oi_oa;
1539
1540         /* The caller just wants to know if there's a chance that this
1541          * I/O can succeed */
1542         for (i = 0; i < oa_bufs; i++) {
1543                 int stripe = lov_stripe_number(lov_oinfo->oi_md, pga[i].off);
1544                 int ost = lov_oinfo->oi_md->lsm_oinfo[stripe]->loi_ost_idx;
1545                 obd_off start, end;
1546
1547                 if (!lov_stripe_intersects(lov_oinfo->oi_md, i, pga[i].off,
1548                                            pga[i].off + pga[i].count - 1,
1549                                            &start, &end))
1550                         continue;
1551
1552                 if (!lov->lov_tgts[ost] || !lov->lov_tgts[ost]->ltd_active) {
1553                         CDEBUG(D_HA, "lov idx %d inactive\n", ost);
1554                         return -EIO;
1555                 }
1556
1557                 rc = obd_brw(OBD_BRW_CHECK, lov->lov_tgts[ost]->ltd_exp, &oinfo,
1558                              1, &pga[i], NULL);
1559                 if (rc)
1560                         break;
1561         }
1562         return rc;
1563 }
1564
1565 static int lov_brw(int cmd, struct obd_export *exp, struct obd_info *oinfo,
1566                    obd_count oa_bufs, struct brw_page *pga,
1567                    struct obd_trans_info *oti)
1568 {
1569         struct lov_request_set *set;
1570         struct lov_request *req;
1571         struct list_head *pos;
1572         struct lov_obd *lov = &exp->exp_obd->u.lov;
1573         int err, rc = 0;
1574         ENTRY;
1575
1576         ASSERT_LSM_MAGIC(oinfo->oi_md);
1577
1578         if (cmd == OBD_BRW_CHECK) {
1579                 rc = lov_brw_check(lov, oinfo, oa_bufs, pga);
1580                 RETURN(rc);
1581         }
1582
1583         rc = lov_prep_brw_set(exp, oinfo, oa_bufs, pga, oti, &set);
1584         if (rc)
1585                 RETURN(rc);
1586
1587         list_for_each (pos, &set->set_list) {
1588                 struct obd_export *sub_exp;
1589                 struct brw_page *sub_pga;
1590                 req = list_entry(pos, struct lov_request, rq_link);
1591
1592                 sub_exp = lov->lov_tgts[req->rq_idx]->ltd_exp;
1593                 sub_pga = set->set_pga + req->rq_pgaidx;
1594                 rc = obd_brw(cmd, sub_exp, &req->rq_oi, req->rq_oabufs,
1595                              sub_pga, oti);
1596                 if (rc)
1597                         break;
1598                 lov_update_common_set(set, req, rc);
1599         }
1600
1601         err = lov_fini_brw_set(set);
1602         if (!rc)
1603                 rc = err;
1604         RETURN(rc);
1605 }
1606
1607 static int lov_enqueue_interpret(struct ptlrpc_request_set *rqset,
1608                                  void *data, int rc)
1609 {
1610         struct lov_request_set *lovset = (struct lov_request_set *)data;
1611         ENTRY;
1612         rc = lov_fini_enqueue_set(lovset, lovset->set_ei->ei_mode, rc, rqset);
1613         RETURN(rc);
1614 }
1615
1616 static int lov_enqueue(struct obd_export *exp, struct obd_info *oinfo,
1617                        struct ldlm_enqueue_info *einfo,
1618                        struct ptlrpc_request_set *rqset)
1619 {
1620         ldlm_mode_t mode = einfo->ei_mode;
1621         struct lov_request_set *set;
1622         struct lov_request *req;
1623         struct list_head *pos;
1624         struct lov_obd *lov;
1625         ldlm_error_t rc;
1626         ENTRY;
1627
1628         LASSERT(oinfo);
1629         ASSERT_LSM_MAGIC(oinfo->oi_md);
1630         LASSERT(mode == (mode & -mode));
1631
1632         /* we should never be asked to replay a lock this way. */
1633         LASSERT((oinfo->oi_flags & LDLM_FL_REPLAY) == 0);
1634
1635         if (!exp || !exp->exp_obd)
1636                 RETURN(-ENODEV);
1637
1638         lov = &exp->exp_obd->u.lov;
1639         rc = lov_prep_enqueue_set(exp, oinfo, einfo, &set);
1640         if (rc)
1641                 RETURN(rc);
1642
1643         list_for_each (pos, &set->set_list) {
1644                 req = list_entry(pos, struct lov_request, rq_link);
1645
1646                 rc = obd_enqueue(lov->lov_tgts[req->rq_idx]->ltd_exp,
1647                                  &req->rq_oi, einfo, rqset);
1648                 if (rc != ELDLM_OK)
1649                         GOTO(out, rc);
1650         }
1651
1652         if (rqset && !list_empty(&rqset->set_requests)) {
1653                 LASSERT(rc == 0);
1654                 LASSERT(rqset->set_interpret == NULL);
1655                 rqset->set_interpret = lov_enqueue_interpret;
1656                 rqset->set_arg = (void *)set;
1657                 RETURN(rc);
1658         }
1659 out:
1660         rc = lov_fini_enqueue_set(set, mode, rc, rqset);
1661         RETURN(rc);
1662 }
1663
1664 static int lov_change_cbdata(struct obd_export *exp,
1665                              struct lov_stripe_md *lsm, ldlm_iterator_t it,
1666                              void *data)
1667 {
1668         struct lov_obd *lov;
1669         int rc = 0, i;
1670         ENTRY;
1671
1672         ASSERT_LSM_MAGIC(lsm);
1673
1674         if (!exp || !exp->exp_obd)
1675                 RETURN(-ENODEV);
1676
1677         lov = &exp->exp_obd->u.lov;
1678         for (i = 0; i < lsm->lsm_stripe_count; i++) {
1679                 struct lov_stripe_md submd;
1680                 struct lov_oinfo *loi = lsm->lsm_oinfo[i];
1681
1682                 if (!lov->lov_tgts[loi->loi_ost_idx]) {
1683                         CDEBUG(D_HA, "lov idx %d NULL \n", loi->loi_ost_idx);
1684                         continue;
1685                 }
1686
1687                 submd.lsm_oi = loi->loi_oi;
1688                 submd.lsm_stripe_count = 0;
1689                 rc = obd_change_cbdata(lov->lov_tgts[loi->loi_ost_idx]->ltd_exp,
1690                                        &submd, it, data);
1691         }
1692         RETURN(rc);
1693 }
1694
1695 /* find any ldlm lock of the inode in lov
1696  * return 0    not find
1697  *      1    find one
1698  *      < 0    error */
1699 static int lov_find_cbdata(struct obd_export *exp,
1700                            struct lov_stripe_md *lsm, ldlm_iterator_t it,
1701                            void *data)
1702 {
1703         struct lov_obd *lov;
1704         int rc = 0, i;
1705         ENTRY;
1706
1707         ASSERT_LSM_MAGIC(lsm);
1708
1709         if (!exp || !exp->exp_obd)
1710                 RETURN(-ENODEV);
1711
1712         lov = &exp->exp_obd->u.lov;
1713         for (i = 0; i < lsm->lsm_stripe_count; i++) {
1714                 struct lov_stripe_md submd;
1715                 struct lov_oinfo *loi = lsm->lsm_oinfo[i];
1716
1717                 if (!lov->lov_tgts[loi->loi_ost_idx]) {
1718                         CDEBUG(D_HA, "lov idx %d NULL \n", loi->loi_ost_idx);
1719                         continue;
1720                 }
1721                 submd.lsm_oi = loi->loi_oi;
1722                 submd.lsm_stripe_count = 0;
1723                 rc = obd_find_cbdata(lov->lov_tgts[loi->loi_ost_idx]->ltd_exp,
1724                                      &submd, it, data);
1725                 if (rc != 0)
1726                         RETURN(rc);
1727         }
1728         RETURN(rc);
1729 }
1730
1731 static int lov_cancel(struct obd_export *exp, struct lov_stripe_md *lsm,
1732                       __u32 mode, struct lustre_handle *lockh)
1733 {
1734         struct lov_request_set *set;
1735         struct obd_info oinfo;
1736         struct lov_request *req;
1737         struct list_head *pos;
1738         struct lov_obd *lov;
1739         struct lustre_handle *lov_lockhp;
1740         int err = 0, rc = 0;
1741         ENTRY;
1742
1743         ASSERT_LSM_MAGIC(lsm);
1744
1745         if (!exp || !exp->exp_obd)
1746                 RETURN(-ENODEV);
1747
1748         LASSERT(lockh);
1749         lov = &exp->exp_obd->u.lov;
1750         rc = lov_prep_cancel_set(exp, &oinfo, lsm, mode, lockh, &set);
1751         if (rc)
1752                 RETURN(rc);
1753
1754         list_for_each(pos, &set->set_list) {
1755                 req = list_entry(pos, struct lov_request, rq_link);
1756                 lov_lockhp = set->set_lockh->llh_handles + req->rq_stripe;
1757
1758                 rc = obd_cancel(lov->lov_tgts[req->rq_idx]->ltd_exp,
1759                                 req->rq_oi.oi_md, mode, lov_lockhp);
1760                 rc = lov_update_common_set(set, req, rc);
1761                 if (rc) {
1762                         CERROR("%s: cancel objid "DOSTID" subobj "
1763                                DOSTID" on OST idx %d: rc = %d\n",
1764                                exp->exp_obd->obd_name, POSTID(&lsm->lsm_oi),
1765                                POSTID(&req->rq_oi.oi_md->lsm_oi),
1766                                req->rq_idx, rc);
1767                         err = rc;
1768                 }
1769
1770         }
1771         lov_fini_cancel_set(set);
1772         RETURN(err);
1773 }
1774
1775 static int lov_cancel_unused(struct obd_export *exp,
1776                              struct lov_stripe_md *lsm,
1777                              ldlm_cancel_flags_t flags, void *opaque)
1778 {
1779         struct lov_obd *lov;
1780         int rc = 0, i;
1781         ENTRY;
1782
1783         if (!exp || !exp->exp_obd)
1784                 RETURN(-ENODEV);
1785
1786         lov = &exp->exp_obd->u.lov;
1787         if (lsm == NULL) {
1788                 for (i = 0; i < lov->desc.ld_tgt_count; i++) {
1789                         int err;
1790                         if (!lov->lov_tgts[i] || !lov->lov_tgts[i]->ltd_exp)
1791                                 continue;
1792
1793                         err = obd_cancel_unused(lov->lov_tgts[i]->ltd_exp, NULL,
1794                                                 flags, opaque);
1795                         if (!rc)
1796                                 rc = err;
1797                 }
1798                 RETURN(rc);
1799         }
1800
1801         ASSERT_LSM_MAGIC(lsm);
1802
1803         for (i = 0; i < lsm->lsm_stripe_count; i++) {
1804                 struct lov_stripe_md submd;
1805                 struct lov_oinfo *loi = lsm->lsm_oinfo[i];
1806                 int idx = loi->loi_ost_idx;
1807                 int err;
1808
1809                 if (!lov->lov_tgts[idx]) {
1810                         CDEBUG(D_HA, "lov idx %d NULL\n", idx);
1811                         continue;
1812                 }
1813
1814                 if (!lov->lov_tgts[idx]->ltd_active)
1815                         CDEBUG(D_HA, "lov idx %d inactive\n", idx);
1816
1817                 submd.lsm_oi = loi->loi_oi;
1818                 submd.lsm_stripe_count = 0;
1819                 err = obd_cancel_unused(lov->lov_tgts[idx]->ltd_exp,
1820                                         &submd, flags, opaque);
1821                 if (err && lov->lov_tgts[idx]->ltd_active) {
1822                         CERROR("%s: cancel unused objid "DOSTID
1823                                " subobj "DOSTID" on OST idx %d: rc = %d\n",
1824                                exp->exp_obd->obd_name, POSTID(&lsm->lsm_oi),
1825                                POSTID(&loi->loi_oi), idx, err);
1826                         if (!rc)
1827                                 rc = err;
1828                 }
1829         }
1830         RETURN(rc);
1831 }
1832
1833 int lov_statfs_interpret(struct ptlrpc_request_set *rqset, void *data, int rc)
1834 {
1835         struct lov_request_set *lovset = (struct lov_request_set *)data;
1836         int err;
1837         ENTRY;
1838
1839         if (rc)
1840                 atomic_set(&lovset->set_completes, 0);
1841
1842         err = lov_fini_statfs_set(lovset);
1843         RETURN(rc ? rc : err);
1844 }
1845
1846 static int lov_statfs_async(struct obd_export *exp, struct obd_info *oinfo,
1847                             __u64 max_age, struct ptlrpc_request_set *rqset)
1848 {
1849         struct obd_device      *obd = class_exp2obd(exp);
1850         struct lov_request_set *set;
1851         struct lov_request *req;
1852         struct list_head *pos;
1853         struct lov_obd *lov;
1854         int rc = 0;
1855         ENTRY;
1856
1857         LASSERT(oinfo != NULL);
1858         LASSERT(oinfo->oi_osfs != NULL);
1859
1860         lov = &obd->u.lov;
1861         rc = lov_prep_statfs_set(obd, oinfo, &set);
1862         if (rc)
1863                 RETURN(rc);
1864
1865         list_for_each (pos, &set->set_list) {
1866                 req = list_entry(pos, struct lov_request, rq_link);
1867                 rc = obd_statfs_async(lov->lov_tgts[req->rq_idx]->ltd_exp,
1868                                       &req->rq_oi, max_age, rqset);
1869                 if (rc)
1870                         break;
1871         }
1872
1873         if (rc || list_empty(&rqset->set_requests)) {
1874                 int err;
1875                 if (rc)
1876                         atomic_set(&set->set_completes, 0);
1877                 err = lov_fini_statfs_set(set);
1878                 RETURN(rc ? rc : err);
1879         }
1880
1881         LASSERT(rqset->set_interpret == NULL);
1882         rqset->set_interpret = lov_statfs_interpret;
1883         rqset->set_arg = (void *)set;
1884         RETURN(0);
1885 }
1886
1887 static int lov_statfs(const struct lu_env *env, struct obd_export *exp,
1888                       struct obd_statfs *osfs, __u64 max_age, __u32 flags)
1889 {
1890         struct ptlrpc_request_set *set = NULL;
1891         struct obd_info oinfo = { { { 0 } } };
1892         int rc = 0;
1893         ENTRY;
1894
1895
1896         /* for obdclass we forbid using obd_statfs_rqset, but prefer using async
1897          * statfs requests */
1898         set = ptlrpc_prep_set();
1899         if (set == NULL)
1900                 RETURN(-ENOMEM);
1901
1902         oinfo.oi_osfs = osfs;
1903         oinfo.oi_flags = flags;
1904         rc = lov_statfs_async(exp, &oinfo, max_age, set);
1905         if (rc == 0)
1906                 rc = ptlrpc_set_wait(set);
1907         ptlrpc_set_destroy(set);
1908
1909         RETURN(rc);
1910 }
1911
1912 static int lov_iocontrol(unsigned int cmd, struct obd_export *exp, int len,
1913                          void *karg, void *uarg)
1914 {
1915         struct obd_device *obddev = class_exp2obd(exp);
1916         struct lov_obd *lov = &obddev->u.lov;
1917         int i = 0, rc = 0, count = lov->desc.ld_tgt_count;
1918         struct obd_uuid *uuidp;
1919         ENTRY;
1920
1921         switch (cmd) {
1922         case IOC_OBD_STATFS: {
1923                 struct obd_ioctl_data *data = karg;
1924                 struct obd_device *osc_obd;
1925                 struct obd_statfs stat_buf = {0};
1926                 __u32 index;
1927                 __u32 flags;
1928
1929                 memcpy(&index, data->ioc_inlbuf2, sizeof(__u32));
1930                 if ((index >= count))
1931                         RETURN(-ENODEV);
1932
1933                 if (!lov->lov_tgts[index])
1934                         /* Try again with the next index */
1935                         RETURN(-EAGAIN);
1936                 if (!lov->lov_tgts[index]->ltd_active)
1937                         RETURN(-ENODATA);
1938
1939                 osc_obd = class_exp2obd(lov->lov_tgts[index]->ltd_exp);
1940                 if (!osc_obd)
1941                         RETURN(-EINVAL);
1942
1943                 /* copy UUID */
1944                 if (copy_to_user(data->ioc_pbuf2, obd2cli_tgt(osc_obd),
1945                                      min((int) data->ioc_plen2,
1946                                          (int) sizeof(struct obd_uuid))))
1947                         RETURN(-EFAULT);
1948
1949                 flags = uarg ? *(__u32*)uarg : 0;
1950                 /* got statfs data */
1951                 rc = obd_statfs(NULL, lov->lov_tgts[index]->ltd_exp, &stat_buf,
1952                                 cfs_time_shift_64(-OBD_STATFS_CACHE_SECONDS),
1953                                 flags);
1954                 if (rc)
1955                         RETURN(rc);
1956                 if (copy_to_user(data->ioc_pbuf1, &stat_buf,
1957                                      min((int) data->ioc_plen1,
1958                                          (int) sizeof(stat_buf))))
1959                         RETURN(-EFAULT);
1960                 break;
1961         }
1962         case OBD_IOC_LOV_GET_CONFIG: {
1963                 struct obd_ioctl_data *data;
1964                 struct lov_desc *desc;
1965                 char *buf = NULL;
1966                 __u32 *genp;
1967
1968                 len = 0;
1969                 if (obd_ioctl_getdata(&buf, &len, (void *)uarg))
1970                         RETURN(-EINVAL);
1971
1972                 data = (struct obd_ioctl_data *)buf;
1973
1974                 if (sizeof(*desc) > data->ioc_inllen1) {
1975                         obd_ioctl_freedata(buf, len);
1976                         RETURN(-EINVAL);
1977                 }
1978
1979                 if (sizeof(uuidp->uuid) * count > data->ioc_inllen2) {
1980                         obd_ioctl_freedata(buf, len);
1981                         RETURN(-EINVAL);
1982                 }
1983
1984                 if (sizeof(__u32) * count > data->ioc_inllen3) {
1985                         obd_ioctl_freedata(buf, len);
1986                         RETURN(-EINVAL);
1987                 }
1988
1989                 desc = (struct lov_desc *)data->ioc_inlbuf1;
1990                 memcpy(desc, &(lov->desc), sizeof(*desc));
1991
1992                 uuidp = (struct obd_uuid *)data->ioc_inlbuf2;
1993                 genp = (__u32 *)data->ioc_inlbuf3;
1994                 /* the uuid will be empty for deleted OSTs */
1995                 for (i = 0; i < count; i++, uuidp++, genp++) {
1996                         if (!lov->lov_tgts[i])
1997                                 continue;
1998                         *uuidp = lov->lov_tgts[i]->ltd_uuid;
1999                         *genp = lov->lov_tgts[i]->ltd_gen;
2000                 }
2001
2002                 if (copy_to_user((void *)uarg, buf, len))
2003                         rc = -EFAULT;
2004                 obd_ioctl_freedata(buf, len);
2005                 break;
2006         }
2007         case LL_IOC_LOV_SETSTRIPE:
2008                 rc = lov_setstripe(exp, len, karg, uarg);
2009                 break;
2010         case LL_IOC_LOV_GETSTRIPE:
2011                 rc = lov_getstripe(exp, karg, uarg);
2012                 break;
2013         case LL_IOC_LOV_SETEA:
2014                 rc = lov_setea(exp, karg, uarg);
2015                 break;
2016         case OBD_IOC_QUOTACTL: {
2017                 struct if_quotactl *qctl = karg;
2018                 struct lov_tgt_desc *tgt = NULL;
2019                 struct obd_quotactl *oqctl;
2020
2021                 if (qctl->qc_valid == QC_OSTIDX) {
2022                         if (qctl->qc_idx < 0 || count <= qctl->qc_idx)
2023                                 RETURN(-EINVAL);
2024
2025                         tgt = lov->lov_tgts[qctl->qc_idx];
2026                         if (!tgt || !tgt->ltd_exp)
2027                                 RETURN(-EINVAL);
2028                 } else if (qctl->qc_valid == QC_UUID) {
2029                         for (i = 0; i < count; i++) {
2030                                 tgt = lov->lov_tgts[i];
2031                                 if (!tgt ||
2032                                     !obd_uuid_equals(&tgt->ltd_uuid,
2033                                                      &qctl->obd_uuid))
2034                                         continue;
2035
2036                                 if (tgt->ltd_exp == NULL)
2037                                         RETURN(-EINVAL);
2038
2039                                 break;
2040                         }
2041                 } else {
2042                         RETURN(-EINVAL);
2043                 }
2044
2045                 if (i >= count)
2046                         RETURN(-EAGAIN);
2047
2048                 LASSERT(tgt && tgt->ltd_exp);
2049                 OBD_ALLOC_PTR(oqctl);
2050                 if (!oqctl)
2051                         RETURN(-ENOMEM);
2052
2053                 QCTL_COPY(oqctl, qctl);
2054                 rc = obd_quotactl(tgt->ltd_exp, oqctl);
2055                 if (rc == 0) {
2056                         QCTL_COPY(qctl, oqctl);
2057                         qctl->qc_valid = QC_OSTIDX;
2058                         qctl->obd_uuid = tgt->ltd_uuid;
2059                 }
2060                 OBD_FREE_PTR(oqctl);
2061                 break;
2062         }
2063         default: {
2064                 int set = 0;
2065
2066                 if (count == 0)
2067                         RETURN(-ENOTTY);
2068
2069                 for (i = 0; i < count; i++) {
2070                         int err;
2071                         struct obd_device *osc_obd;
2072
2073                         /* OST was disconnected */
2074                         if (!lov->lov_tgts[i] || !lov->lov_tgts[i]->ltd_exp)
2075                                 continue;
2076
2077                         /* ll_umount_begin() sets force flag but for lov, not
2078                          * osc. Let's pass it through */
2079                         osc_obd = class_exp2obd(lov->lov_tgts[i]->ltd_exp);
2080                         osc_obd->obd_force = obddev->obd_force;
2081                         err = obd_iocontrol(cmd, lov->lov_tgts[i]->ltd_exp,
2082                                             len, karg, uarg);
2083                         if (err == -ENODATA && cmd == OBD_IOC_POLL_QUOTACHECK) {
2084                                 RETURN(err);
2085                         } else if (err) {
2086                                 if (lov->lov_tgts[i]->ltd_active) {
2087                                         CDEBUG(err == -ENOTTY ?
2088                                                D_IOCTL : D_WARNING,
2089                                                "iocontrol OSC %s on OST "
2090                                                "idx %d cmd %x: err = %d\n",
2091                                                lov_uuid2str(lov, i),
2092                                                i, cmd, err);
2093                                         if (!rc)
2094                                                 rc = err;
2095                                 }
2096                         } else {
2097                                 set = 1;
2098                         }
2099                 }
2100                 if (!set && !rc)
2101                         rc = -EIO;
2102         }
2103         }
2104
2105         RETURN(rc);
2106 }
2107
2108 #define FIEMAP_BUFFER_SIZE 4096
2109
2110 /**
2111  * Non-zero fe_logical indicates that this is a continuation FIEMAP
2112  * call. The local end offset and the device are sent in the first
2113  * fm_extent. This function calculates the stripe number from the index.
2114  * This function returns a stripe_no on which mapping is to be restarted.
2115  *
2116  * This function returns fm_end_offset which is the in-OST offset at which
2117  * mapping should be restarted. If fm_end_offset=0 is returned then caller
2118  * will re-calculate proper offset in next stripe.
2119  * Note that the first extent is passed to lov_get_info via the value field.
2120  *
2121  * \param fiemap fiemap request header
2122  * \param lsm striping information for the file
2123  * \param fm_start logical start of mapping
2124  * \param fm_end logical end of mapping
2125  * \param start_stripe starting stripe will be returned in this
2126  */
2127 obd_size fiemap_calc_fm_end_offset(struct ll_user_fiemap *fiemap,
2128                                    struct lov_stripe_md *lsm, obd_size fm_start,
2129                                    obd_size fm_end, int *start_stripe)
2130 {
2131         obd_size local_end = fiemap->fm_extents[0].fe_logical;
2132         obd_off lun_start, lun_end;
2133         obd_size fm_end_offset;
2134         int stripe_no = -1, i;
2135
2136         if (fiemap->fm_extent_count == 0 ||
2137             fiemap->fm_extents[0].fe_logical == 0)
2138                 return 0;
2139
2140         /* Find out stripe_no from ost_index saved in the fe_device */
2141         for (i = 0; i < lsm->lsm_stripe_count; i++) {
2142                 if (lsm->lsm_oinfo[i]->loi_ost_idx ==
2143                                         fiemap->fm_extents[0].fe_device) {
2144                         stripe_no = i;
2145                         break;
2146                 }
2147         }
2148         if (stripe_no == -1)
2149                 return -EINVAL;
2150
2151         /* If we have finished mapping on previous device, shift logical
2152          * offset to start of next device */
2153         if ((lov_stripe_intersects(lsm, stripe_no, fm_start, fm_end,
2154                                    &lun_start, &lun_end)) != 0 &&
2155                                    local_end < lun_end) {
2156                 fm_end_offset = local_end;
2157                 *start_stripe = stripe_no;
2158         } else {
2159                 /* This is a special value to indicate that caller should
2160                  * calculate offset in next stripe. */
2161                 fm_end_offset = 0;
2162                 *start_stripe = (stripe_no + 1) % lsm->lsm_stripe_count;
2163         }
2164
2165         return fm_end_offset;
2166 }
2167
2168 /**
2169  * We calculate on which OST the mapping will end. If the length of mapping
2170  * is greater than (stripe_size * stripe_count) then the last_stripe will
2171  * will be one just before start_stripe. Else we check if the mapping
2172  * intersects each OST and find last_stripe.
2173  * This function returns the last_stripe and also sets the stripe_count
2174  * over which the mapping is spread
2175  *
2176  * \param lsm striping information for the file
2177  * \param fm_start logical start of mapping
2178  * \param fm_end logical end of mapping
2179  * \param start_stripe starting stripe of the mapping
2180  * \param stripe_count the number of stripes across which to map is returned
2181  *
2182  * \retval last_stripe return the last stripe of the mapping
2183  */
2184 int fiemap_calc_last_stripe(struct lov_stripe_md *lsm, obd_size fm_start,
2185                             obd_size fm_end, int start_stripe,
2186                             int *stripe_count)
2187 {
2188         int last_stripe;
2189         obd_off obd_start, obd_end;
2190         int i, j;
2191
2192         if (fm_end - fm_start > lsm->lsm_stripe_size * lsm->lsm_stripe_count) {
2193                 last_stripe = (start_stripe < 1 ? lsm->lsm_stripe_count - 1 :
2194                                                               start_stripe - 1);
2195                 *stripe_count = lsm->lsm_stripe_count;
2196         } else {
2197                 for (j = 0, i = start_stripe; j < lsm->lsm_stripe_count;
2198                      i = (i + 1) % lsm->lsm_stripe_count, j++) {
2199                         if ((lov_stripe_intersects(lsm, i, fm_start, fm_end,
2200                                                    &obd_start, &obd_end)) == 0)
2201                                 break;
2202                 }
2203                 *stripe_count = j;
2204                 last_stripe = (start_stripe + j - 1) %lsm->lsm_stripe_count;
2205         }
2206
2207         return last_stripe;
2208 }
2209
2210 /**
2211  * Set fe_device and copy extents from local buffer into main return buffer.
2212  *
2213  * \param fiemap fiemap request header
2214  * \param lcl_fm_ext array of local fiemap extents to be copied
2215  * \param ost_index OST index to be written into the fm_device field for each
2216                     extent
2217  * \param ext_count number of extents to be copied
2218  * \param current_extent where to start copying in main extent array
2219  */
2220 void fiemap_prepare_and_copy_exts(struct ll_user_fiemap *fiemap,
2221                                   struct ll_fiemap_extent *lcl_fm_ext,
2222                                   int ost_index, unsigned int ext_count,
2223                                   int current_extent)
2224 {
2225         char *to;
2226         int ext;
2227
2228         for (ext = 0; ext < ext_count; ext++) {
2229                 lcl_fm_ext[ext].fe_device = ost_index;
2230                 lcl_fm_ext[ext].fe_flags |= FIEMAP_EXTENT_NET;
2231         }
2232
2233         /* Copy fm_extent's from fm_local to return buffer */
2234         to = (char *)fiemap + fiemap_count_to_size(current_extent);
2235         memcpy(to, lcl_fm_ext, ext_count * sizeof(struct ll_fiemap_extent));
2236 }
2237
2238 /**
2239  * Break down the FIEMAP request and send appropriate calls to individual OSTs.
2240  * This also handles the restarting of FIEMAP calls in case mapping overflows
2241  * the available number of extents in single call.
2242  */
2243 static int lov_fiemap(struct lov_obd *lov, __u32 keylen, void *key,
2244                       __u32 *vallen, void *val, struct lov_stripe_md *lsm)
2245 {
2246         struct ll_fiemap_info_key *fm_key = key;
2247         struct ll_user_fiemap *fiemap = val;
2248         struct ll_user_fiemap *fm_local = NULL;
2249         struct ll_fiemap_extent *lcl_fm_ext;
2250         int count_local;
2251         unsigned int get_num_extents = 0;
2252         int ost_index = 0, actual_start_stripe, start_stripe;
2253         obd_size fm_start, fm_end, fm_length, fm_end_offset;
2254         obd_size curr_loc;
2255         int current_extent = 0, rc = 0, i;
2256         int ost_eof = 0; /* EOF for object */
2257         int ost_done = 0; /* done with required mapping for this OST? */
2258         int last_stripe;
2259         int cur_stripe = 0, cur_stripe_wrap = 0, stripe_count;
2260         unsigned int buffer_size = FIEMAP_BUFFER_SIZE;
2261
2262         if (lsm == NULL)
2263                 GOTO(out, rc = 0);
2264
2265         if (fiemap_count_to_size(fm_key->fiemap.fm_extent_count) < buffer_size)
2266                 buffer_size = fiemap_count_to_size(fm_key->fiemap.fm_extent_count);
2267
2268         OBD_ALLOC_LARGE(fm_local, buffer_size);
2269         if (fm_local == NULL)
2270                 GOTO(out, rc = -ENOMEM);
2271         lcl_fm_ext = &fm_local->fm_extents[0];
2272
2273         count_local = fiemap_size_to_count(buffer_size);
2274
2275         memcpy(fiemap, &fm_key->fiemap, sizeof(*fiemap));
2276         fm_start = fiemap->fm_start;
2277         fm_length = fiemap->fm_length;
2278         /* Calculate start stripe, last stripe and length of mapping */
2279         actual_start_stripe = start_stripe = lov_stripe_number(lsm, fm_start);
2280         fm_end = (fm_length == ~0ULL ? fm_key->oa.o_size :
2281                                                 fm_start + fm_length - 1);
2282         /* If fm_length != ~0ULL but fm_start+fm_length-1 exceeds file size */
2283         if (fm_end > fm_key->oa.o_size)
2284                 fm_end = fm_key->oa.o_size;
2285
2286         last_stripe = fiemap_calc_last_stripe(lsm, fm_start, fm_end,
2287                                             actual_start_stripe, &stripe_count);
2288
2289         fm_end_offset = fiemap_calc_fm_end_offset(fiemap, lsm, fm_start,
2290                                                   fm_end, &start_stripe);
2291         if (fm_end_offset == -EINVAL)
2292                 GOTO(out, rc = -EINVAL);
2293
2294         if (fiemap->fm_extent_count == 0) {
2295                 get_num_extents = 1;
2296                 count_local = 0;
2297         }
2298
2299         /* Check each stripe */
2300         for (cur_stripe = start_stripe, i = 0; i < stripe_count;
2301              i++, cur_stripe = (cur_stripe + 1) % lsm->lsm_stripe_count) {
2302                 obd_size req_fm_len; /* Stores length of required mapping */
2303                 obd_size len_mapped_single_call;
2304                 obd_off lun_start, lun_end, obd_object_end;
2305                 unsigned int ext_count;
2306
2307                 cur_stripe_wrap = cur_stripe;
2308
2309                 /* Find out range of mapping on this stripe */
2310                 if ((lov_stripe_intersects(lsm, cur_stripe, fm_start, fm_end,
2311                                            &lun_start, &obd_object_end)) == 0)
2312                         continue;
2313
2314                 /* If this is a continuation FIEMAP call and we are on
2315                  * starting stripe then lun_start needs to be set to
2316                  * fm_end_offset */
2317                 if (fm_end_offset != 0 && cur_stripe == start_stripe)
2318                         lun_start = fm_end_offset;
2319
2320                 if (fm_length != ~0ULL) {
2321                         /* Handle fm_start + fm_length overflow */
2322                         if (fm_start + fm_length < fm_start)
2323                                 fm_length = ~0ULL - fm_start;
2324                         lun_end = lov_size_to_stripe(lsm, fm_start + fm_length,
2325                                                      cur_stripe);
2326                 } else {
2327                         lun_end = ~0ULL;
2328                 }
2329
2330                 if (lun_start == lun_end)
2331                         continue;
2332
2333                 req_fm_len = obd_object_end - lun_start;
2334                 fm_local->fm_length = 0;
2335                 len_mapped_single_call = 0;
2336
2337                 /* If the output buffer is very large and the objects have many
2338                  * extents we may need to loop on a single OST repeatedly */
2339                 ost_eof = 0;
2340                 ost_done = 0;
2341                 do {
2342                         if (get_num_extents == 0) {
2343                                 /* Don't get too many extents. */
2344                                 if (current_extent + count_local >
2345                                     fiemap->fm_extent_count)
2346                                         count_local = fiemap->fm_extent_count -
2347                                                                  current_extent;
2348                         }
2349
2350                         lun_start += len_mapped_single_call;
2351                         fm_local->fm_length = req_fm_len - len_mapped_single_call;
2352                         req_fm_len = fm_local->fm_length;
2353                         fm_local->fm_extent_count = count_local;
2354                         fm_local->fm_mapped_extents = 0;
2355                         fm_local->fm_flags = fiemap->fm_flags;
2356
2357                         fm_key->oa.o_oi = lsm->lsm_oinfo[cur_stripe]->loi_oi;
2358                         ost_index = lsm->lsm_oinfo[cur_stripe]->loi_ost_idx;
2359
2360                         if (ost_index < 0 || ost_index >=lov->desc.ld_tgt_count)
2361                                 GOTO(out, rc = -EINVAL);
2362
2363                         /* If OST is inactive, return extent with UNKNOWN flag */
2364                         if (!lov->lov_tgts[ost_index]->ltd_active) {
2365                                 fm_local->fm_flags |= FIEMAP_EXTENT_LAST;
2366                                 fm_local->fm_mapped_extents = 1;
2367
2368                                 lcl_fm_ext[0].fe_logical = lun_start;
2369                                 lcl_fm_ext[0].fe_length = obd_object_end -
2370                                                                       lun_start;
2371                                 lcl_fm_ext[0].fe_flags |= FIEMAP_EXTENT_UNKNOWN;
2372
2373                                 goto inactive_tgt;
2374                         }
2375
2376                         fm_local->fm_start = lun_start;
2377                         fm_local->fm_flags &= ~FIEMAP_FLAG_DEVICE_ORDER;
2378                         memcpy(&fm_key->fiemap, fm_local, sizeof(*fm_local));
2379                         *vallen=fiemap_count_to_size(fm_local->fm_extent_count);
2380                         rc = obd_get_info(NULL,
2381                                           lov->lov_tgts[ost_index]->ltd_exp,
2382                                           keylen, key, vallen, fm_local, lsm);
2383                         if (rc != 0)
2384                                 GOTO(out, rc);
2385
2386 inactive_tgt:
2387                         ext_count = fm_local->fm_mapped_extents;
2388                         if (ext_count == 0) {
2389                                 ost_done = 1;
2390                                 /* If last stripe has hole at the end,
2391                                  * then we need to return */
2392                                 if (cur_stripe_wrap == last_stripe) {
2393                                         fiemap->fm_mapped_extents = 0;
2394                                         goto finish;
2395                                 }
2396                                 break;
2397                         }
2398
2399                         /* If we just need num of extents then go to next device */
2400                         if (get_num_extents) {
2401                                 current_extent += ext_count;
2402                                 break;
2403                         }
2404
2405                         len_mapped_single_call = lcl_fm_ext[ext_count-1].fe_logical -
2406                                   lun_start + lcl_fm_ext[ext_count - 1].fe_length;
2407
2408                         /* Have we finished mapping on this device? */
2409                         if (req_fm_len <= len_mapped_single_call)
2410                                 ost_done = 1;
2411
2412                         /* Clear the EXTENT_LAST flag which can be present on
2413                          * last extent */
2414                         if (lcl_fm_ext[ext_count-1].fe_flags & FIEMAP_EXTENT_LAST)
2415                                 lcl_fm_ext[ext_count - 1].fe_flags &=
2416                                                             ~FIEMAP_EXTENT_LAST;
2417
2418                         curr_loc = lov_stripe_size(lsm,
2419                                            lcl_fm_ext[ext_count - 1].fe_logical+
2420                                            lcl_fm_ext[ext_count - 1].fe_length,
2421                                            cur_stripe);
2422                         if (curr_loc >= fm_key->oa.o_size)
2423                                 ost_eof = 1;
2424
2425                         fiemap_prepare_and_copy_exts(fiemap, lcl_fm_ext,
2426                                                      ost_index, ext_count,
2427                                                      current_extent);
2428
2429                         current_extent += ext_count;
2430
2431                         /* Ran out of available extents? */
2432                         if (current_extent >= fiemap->fm_extent_count)
2433                                 goto finish;
2434                 } while (ost_done == 0 && ost_eof == 0);
2435
2436                 if (cur_stripe_wrap == last_stripe)
2437                         goto finish;
2438         }
2439
2440 finish:
2441         /* Indicate that we are returning device offsets unless file just has
2442          * single stripe */
2443         if (lsm->lsm_stripe_count > 1)
2444                 fiemap->fm_flags |= FIEMAP_FLAG_DEVICE_ORDER;
2445
2446         if (get_num_extents)
2447                 goto skip_last_device_calc;
2448
2449         /* Check if we have reached the last stripe and whether mapping for that
2450          * stripe is done. */
2451         if (cur_stripe_wrap == last_stripe) {
2452                 if (ost_done || ost_eof)
2453                         fiemap->fm_extents[current_extent - 1].fe_flags |=
2454                                                              FIEMAP_EXTENT_LAST;
2455         }
2456
2457 skip_last_device_calc:
2458         fiemap->fm_mapped_extents = current_extent;
2459
2460 out:
2461         OBD_FREE_LARGE(fm_local, buffer_size);
2462         return rc;
2463 }
2464
2465 static int lov_get_info(const struct lu_env *env, struct obd_export *exp,
2466                         __u32 keylen, void *key, __u32 *vallen, void *val,
2467                         struct lov_stripe_md *lsm)
2468 {
2469         struct obd_device *obddev = class_exp2obd(exp);
2470         struct lov_obd *lov = &obddev->u.lov;
2471         int i, rc;
2472         ENTRY;
2473
2474         if (!vallen || !val)
2475                 RETURN(-EFAULT);
2476
2477         obd_getref(obddev);
2478
2479         if (KEY_IS(KEY_LOCK_TO_STRIPE)) {
2480                 struct {
2481                         char name[16];
2482                         struct ldlm_lock *lock;
2483                 } *data = key;
2484                 struct ldlm_res_id *res_id = &data->lock->l_resource->lr_name;
2485                 struct lov_oinfo *loi;
2486                 __u32 *stripe = val;
2487
2488                 if (*vallen < sizeof(*stripe))
2489                         GOTO(out, rc = -EFAULT);
2490                 *vallen = sizeof(*stripe);
2491
2492                 /* XXX This is another one of those bits that will need to
2493                  * change if we ever actually support nested LOVs.  It uses
2494                  * the lock's export to find out which stripe it is. */
2495                 /* XXX - it's assumed all the locks for deleted OSTs have
2496                  * been cancelled. Also, the export for deleted OSTs will
2497                  * be NULL and won't match the lock's export. */
2498                 for (i = 0; i < lsm->lsm_stripe_count; i++) {
2499                         loi = lsm->lsm_oinfo[i];
2500                         if (!lov->lov_tgts[loi->loi_ost_idx])
2501                                 continue;
2502                         if (lov->lov_tgts[loi->loi_ost_idx]->ltd_exp ==
2503                             data->lock->l_conn_export &&
2504                             ostid_res_name_eq(&loi->loi_oi, res_id)) {
2505                                 *stripe = i;
2506                                 GOTO(out, rc = 0);
2507                         }
2508                 }
2509                 LDLM_ERROR(data->lock, "lock on inode without such object");
2510                 dump_lsm(D_ERROR, lsm);
2511                 GOTO(out, rc = -ENXIO);
2512         } else if (KEY_IS(KEY_LAST_ID)) {
2513                 struct obd_id_info *info = val;
2514                 __u32 size = sizeof(obd_id);
2515                 struct lov_tgt_desc *tgt;
2516
2517                 LASSERT(*vallen == sizeof(struct obd_id_info));
2518                 tgt = lov->lov_tgts[info->idx];
2519
2520                 if (!tgt || !tgt->ltd_active)
2521                         GOTO(out, rc = -ESRCH);
2522
2523                 rc = obd_get_info(env, tgt->ltd_exp, keylen, key,
2524                                   &size, info->data, NULL);
2525                 GOTO(out, rc = 0);
2526         } else if (KEY_IS(KEY_LOVDESC)) {
2527                 struct lov_desc *desc_ret = val;
2528                 *desc_ret = lov->desc;
2529
2530                 GOTO(out, rc = 0);
2531         } else if (KEY_IS(KEY_FIEMAP)) {
2532                 rc = lov_fiemap(lov, keylen, key, vallen, val, lsm);
2533                 GOTO(out, rc);
2534         } else if (KEY_IS(KEY_CONNECT_FLAG)) {
2535                 struct lov_tgt_desc *tgt;
2536                 __u64 ost_idx = *((__u64*)val);
2537
2538                 LASSERT(*vallen == sizeof(__u64));
2539                 LASSERT(ost_idx < lov->desc.ld_tgt_count);
2540                 tgt = lov->lov_tgts[ost_idx];
2541
2542                 if (!tgt || !tgt->ltd_exp)
2543                         GOTO(out, rc = -ESRCH);
2544
2545                 *((__u64 *)val) = exp_connect_flags(tgt->ltd_exp);
2546                 GOTO(out, rc = 0);
2547         } else if (KEY_IS(KEY_TGT_COUNT)) {
2548                 *((int *)val) = lov->desc.ld_tgt_count;
2549                 GOTO(out, rc = 0);
2550         }
2551
2552         rc = -EINVAL;
2553
2554 out:
2555         obd_putref(obddev);
2556         RETURN(rc);
2557 }
2558
2559 static int lov_set_info_async(const struct lu_env *env, struct obd_export *exp,
2560                               obd_count keylen, void *key, obd_count vallen,
2561                               void *val, struct ptlrpc_request_set *set)
2562 {
2563         struct obd_device *obddev = class_exp2obd(exp);
2564         struct lov_obd *lov = &obddev->u.lov;
2565         obd_count count;
2566         int i, rc = 0, err;
2567         struct lov_tgt_desc *tgt;
2568         unsigned incr, check_uuid,
2569                  do_inactive, no_set;
2570         unsigned next_id = 0,  mds_con = 0, capa = 0;
2571         ENTRY;
2572
2573         incr = check_uuid = do_inactive = no_set = 0;
2574         if (set == NULL) {
2575                 no_set = 1;
2576                 set = ptlrpc_prep_set();
2577                 if (!set)
2578                         RETURN(-ENOMEM);
2579         }
2580
2581         obd_getref(obddev);
2582         count = lov->desc.ld_tgt_count;
2583
2584         if (KEY_IS(KEY_NEXT_ID)) {
2585                 count = vallen / sizeof(struct obd_id_info);
2586                 vallen = sizeof(obd_id);
2587                 incr = sizeof(struct obd_id_info);
2588                 do_inactive = 1;
2589                 next_id = 1;
2590         } else if (KEY_IS(KEY_CHECKSUM)) {
2591                 do_inactive = 1;
2592         } else if (KEY_IS(KEY_EVICT_BY_NID)) {
2593                 /* use defaults:  do_inactive = incr = 0; */
2594         } else if (KEY_IS(KEY_MDS_CONN)) {
2595                 mds_con = 1;
2596         } else if (KEY_IS(KEY_CAPA_KEY)) {
2597                 capa = 1;
2598         } else if (KEY_IS(KEY_CACHE_SET)) {
2599                 LASSERT(lov->lov_cache == NULL);
2600                 lov->lov_cache = val;
2601                 do_inactive = 1;
2602         }
2603
2604         for (i = 0; i < count; i++, val = (char *)val + incr) {
2605                 if (next_id) {
2606                         tgt = lov->lov_tgts[((struct obd_id_info*)val)->idx];
2607                 } else {
2608                         tgt = lov->lov_tgts[i];
2609                 }
2610                 /* OST was disconnected */
2611                 if (!tgt || !tgt->ltd_exp)
2612                         continue;
2613
2614                 /* OST is inactive and we don't want inactive OSCs */
2615                 if (!tgt->ltd_active && !do_inactive)
2616                         continue;
2617
2618                 if (mds_con) {
2619                         struct mds_group_info *mgi;
2620
2621                         LASSERT(vallen == sizeof(*mgi));
2622                         mgi = (struct mds_group_info *)val;
2623
2624                         /* Only want a specific OSC */
2625                         if (mgi->uuid && !obd_uuid_equals(mgi->uuid,
2626                                                 &tgt->ltd_uuid))
2627                                 continue;
2628
2629                         err = obd_set_info_async(env, tgt->ltd_exp,
2630                                          keylen, key, sizeof(int),
2631                                          &mgi->group, set);
2632                 } else if (next_id) {
2633                         err = obd_set_info_async(env, tgt->ltd_exp,
2634                                          keylen, key, vallen,
2635                                          ((struct obd_id_info*)val)->data, set);
2636                 } else if (capa) {
2637                         struct mds_capa_info *info = (struct mds_capa_info*)val;
2638
2639                         LASSERT(vallen == sizeof(*info));
2640
2641                          /* Only want a specific OSC */
2642                         if (info->uuid &&
2643                             !obd_uuid_equals(info->uuid, &tgt->ltd_uuid))
2644                                 continue;
2645
2646                         err = obd_set_info_async(env, tgt->ltd_exp, keylen,
2647                                                  key, sizeof(*info->capa),
2648                                                  info->capa, set);
2649                 } else {
2650                         /* Only want a specific OSC */
2651                         if (check_uuid &&
2652                             !obd_uuid_equals(val, &tgt->ltd_uuid))
2653                                 continue;
2654
2655                         err = obd_set_info_async(env, tgt->ltd_exp,
2656                                          keylen, key, vallen, val, set);
2657                 }
2658
2659                 if (!rc)
2660                         rc = err;
2661         }
2662
2663         obd_putref(obddev);
2664         if (no_set) {
2665                 err = ptlrpc_set_wait(set);
2666                 if (!rc)
2667                         rc = err;
2668                 ptlrpc_set_destroy(set);
2669         }
2670         RETURN(rc);
2671 }
2672
2673 static int lov_extent_calc(struct obd_export *exp, struct lov_stripe_md *lsm,
2674                            int cmd, __u64 *offset)
2675 {
2676         __u32 ssize = lsm->lsm_stripe_size;
2677         __u64 start;
2678
2679         start = *offset;
2680         lov_do_div64(start, ssize);
2681         start = start * ssize;
2682
2683         CDEBUG(D_DLMTRACE, "offset "LPU64", stripe %u, start "LPU64
2684                            ", end "LPU64"\n", *offset, ssize, start,
2685                            start + ssize - 1);
2686         if (cmd == OBD_CALC_STRIPE_END) {
2687                 *offset = start + ssize - 1;
2688         } else if (cmd == OBD_CALC_STRIPE_START) {
2689                 *offset = start;
2690         } else {
2691                 LBUG();
2692         }
2693
2694         RETURN(0);
2695 }
2696
2697 void lov_stripe_lock(struct lov_stripe_md *md)
2698 {
2699         LASSERT(md->lsm_lock_owner != current_pid());
2700         spin_lock(&md->lsm_lock);
2701         LASSERT(md->lsm_lock_owner == 0);
2702         md->lsm_lock_owner = current_pid();
2703 }
2704 EXPORT_SYMBOL(lov_stripe_lock);
2705
2706 void lov_stripe_unlock(struct lov_stripe_md *md)
2707 {
2708         LASSERT(md->lsm_lock_owner == current_pid());
2709         md->lsm_lock_owner = 0;
2710         spin_unlock(&md->lsm_lock);
2711 }
2712 EXPORT_SYMBOL(lov_stripe_unlock);
2713
2714 static int lov_quotactl(struct obd_device *obd, struct obd_export *exp,
2715                         struct obd_quotactl *oqctl)
2716 {
2717         struct lov_obd      *lov = &obd->u.lov;
2718         struct lov_tgt_desc *tgt;
2719         __u64           curspace = 0;
2720         __u64           bhardlimit = 0;
2721         int               i, rc = 0;
2722         ENTRY;
2723
2724         if (oqctl->qc_cmd != LUSTRE_Q_QUOTAON &&
2725             oqctl->qc_cmd != LUSTRE_Q_QUOTAOFF &&
2726             oqctl->qc_cmd != Q_GETOQUOTA &&
2727             oqctl->qc_cmd != Q_INITQUOTA &&
2728             oqctl->qc_cmd != LUSTRE_Q_SETQUOTA &&
2729             oqctl->qc_cmd != Q_FINVALIDATE) {
2730                 CERROR("bad quota opc %x for lov obd", oqctl->qc_cmd);
2731                 RETURN(-EFAULT);
2732         }
2733
2734         /* for lov tgt */
2735         obd_getref(obd);
2736         for (i = 0; i < lov->desc.ld_tgt_count; i++) {
2737                 int err;
2738
2739                 tgt = lov->lov_tgts[i];
2740
2741                 if (!tgt)
2742                         continue;
2743
2744                 if (!tgt->ltd_active || tgt->ltd_reap) {
2745                         if (oqctl->qc_cmd == Q_GETOQUOTA &&
2746                             lov->lov_tgts[i]->ltd_activate) {
2747                                 rc = -EREMOTEIO;
2748                                 CERROR("ost %d is inactive\n", i);
2749                         } else {
2750                                 CDEBUG(D_HA, "ost %d is inactive\n", i);
2751                         }
2752                         continue;
2753                 }
2754
2755                 err = obd_quotactl(tgt->ltd_exp, oqctl);
2756                 if (err) {
2757                         if (tgt->ltd_active && !rc)
2758                                 rc = err;
2759                         continue;
2760                 }
2761
2762                 if (oqctl->qc_cmd == Q_GETOQUOTA) {
2763                         curspace += oqctl->qc_dqblk.dqb_curspace;
2764                         bhardlimit += oqctl->qc_dqblk.dqb_bhardlimit;
2765                 }
2766         }
2767         obd_putref(obd);
2768
2769         if (oqctl->qc_cmd == Q_GETOQUOTA) {
2770                 oqctl->qc_dqblk.dqb_curspace = curspace;
2771                 oqctl->qc_dqblk.dqb_bhardlimit = bhardlimit;
2772         }
2773         RETURN(rc);
2774 }
2775
2776 static int lov_quotacheck(struct obd_device *obd, struct obd_export *exp,
2777                           struct obd_quotactl *oqctl)
2778 {
2779         struct lov_obd *lov = &obd->u.lov;
2780         int          i, rc = 0;
2781         ENTRY;
2782
2783         obd_getref(obd);
2784
2785         for (i = 0; i < lov->desc.ld_tgt_count; i++) {
2786                 if (!lov->lov_tgts[i])
2787                         continue;
2788
2789                 /* Skip quota check on the administratively disabled OSTs. */
2790                 if (!lov->lov_tgts[i]->ltd_activate) {
2791                         CWARN("lov idx %d was administratively disabled, "
2792                               "skip quotacheck on it.\n", i);
2793                         continue;
2794                 }
2795
2796                 if (!lov->lov_tgts[i]->ltd_active) {
2797                         CERROR("lov idx %d inactive\n", i);
2798                         rc = -EIO;
2799                         goto out;
2800                 }
2801         }
2802
2803         for (i = 0; i < lov->desc.ld_tgt_count; i++) {
2804                 int err;
2805
2806                 if (!lov->lov_tgts[i] || !lov->lov_tgts[i]->ltd_activate)
2807                         continue;
2808
2809                 err = obd_quotacheck(lov->lov_tgts[i]->ltd_exp, oqctl);
2810                 if (err && !rc)
2811                         rc = err;
2812         }
2813
2814 out:
2815         obd_putref(obd);
2816
2817         RETURN(rc);
2818 }
2819
2820 struct obd_ops lov_obd_ops = {
2821         .o_owner               = THIS_MODULE,
2822         .o_setup               = lov_setup,
2823         .o_precleanup     = lov_precleanup,
2824         .o_cleanup           = lov_cleanup,
2825         //.o_process_config      = lov_process_config,
2826         .o_connect           = lov_connect,
2827         .o_disconnect     = lov_disconnect,
2828         .o_statfs             = lov_statfs,
2829         .o_statfs_async = lov_statfs_async,
2830         .o_packmd             = lov_packmd,
2831         .o_unpackmd         = lov_unpackmd,
2832         .o_create             = lov_create,
2833         .o_destroy           = lov_destroy,
2834         .o_getattr           = lov_getattr,
2835         .o_getattr_async       = lov_getattr_async,
2836         .o_setattr           = lov_setattr,
2837         .o_setattr_async       = lov_setattr_async,
2838         .o_brw           = lov_brw,
2839         .o_merge_lvb       = lov_merge_lvb,
2840         .o_adjust_kms     = lov_adjust_kms,
2841         .o_punch               = lov_punch,
2842         .o_sync         = lov_sync,
2843         .o_enqueue           = lov_enqueue,
2844         .o_change_cbdata       = lov_change_cbdata,
2845         .o_find_cbdata   = lov_find_cbdata,
2846         .o_cancel             = lov_cancel,
2847         .o_cancel_unused       = lov_cancel_unused,
2848         .o_iocontrol       = lov_iocontrol,
2849         .o_get_info         = lov_get_info,
2850         .o_set_info_async      = lov_set_info_async,
2851         .o_extent_calc   = lov_extent_calc,
2852         .o_llog_init       = lov_llog_init,
2853         .o_llog_finish   = lov_llog_finish,
2854         .o_notify             = lov_notify,
2855         .o_pool_new         = lov_pool_new,
2856         .o_pool_rem         = lov_pool_remove,
2857         .o_pool_add         = lov_pool_add,
2858         .o_pool_del         = lov_pool_del,
2859         .o_getref             = lov_getref,
2860         .o_putref             = lov_putref,
2861         .o_quotactl         = lov_quotactl,
2862         .o_quotacheck     = lov_quotacheck,
2863 };
2864
2865 struct kmem_cache *lov_oinfo_slab;
2866
2867 extern struct lu_kmem_descr lov_caches[];
2868
2869 int __init lov_init(void)
2870 {
2871         struct lprocfs_static_vars lvars = { 0 };
2872         int rc;
2873         ENTRY;
2874
2875         /* print an address of _any_ initialized kernel symbol from this
2876          * module, to allow debugging with gdb that doesn't support data
2877          * symbols from modules.*/
2878         CDEBUG(D_INFO, "Lustre LOV module (%p).\n", &lov_caches);
2879
2880         rc = lu_kmem_init(lov_caches);
2881         if (rc)
2882                 return rc;
2883
2884         lov_oinfo_slab = kmem_cache_create("lov_oinfo",
2885                                               sizeof(struct lov_oinfo),
2886                                               0, SLAB_HWCACHE_ALIGN, NULL);
2887         if (lov_oinfo_slab == NULL) {
2888                 lu_kmem_fini(lov_caches);
2889                 return -ENOMEM;
2890         }
2891         lprocfs_lov_init_vars(&lvars);
2892
2893         rc = class_register_type(&lov_obd_ops, NULL, lvars.module_vars,
2894                                  LUSTRE_LOV_NAME, &lov_device_type);
2895
2896         if (rc) {
2897                 kmem_cache_destroy(lov_oinfo_slab);
2898                 lu_kmem_fini(lov_caches);
2899         }
2900
2901         RETURN(rc);
2902 }
2903
2904 static void /*__exit*/ lov_exit(void)
2905 {
2906         class_unregister_type(LUSTRE_LOV_NAME);
2907         kmem_cache_destroy(lov_oinfo_slab);
2908
2909         lu_kmem_fini(lov_caches);
2910 }
2911
2912 MODULE_AUTHOR("Sun Microsystems, Inc. <http://www.lustre.org/>");
2913 MODULE_DESCRIPTION("Lustre Logical Object Volume OBD driver");
2914 MODULE_LICENSE("GPL");
2915
2916 cfs_module(lov, LUSTRE_VERSION_STRING, lov_init, lov_exit);