lustre/lov/lov_obd.c

   1 /* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
   2  * vim:expandtab:shiftwidth=8:tabstop=8:
   3  *
   4  * Copyright (C) 2002, 2003 Cluster File Systems, Inc.
   5  * Author: Phil Schwan <phil@clusterfs.com>
   6  *         Peter Braam <braam@clusterfs.com>
   7  *         Mike Shaver <shaver@clusterfs.com>
   8  *
   9  *   This file is part of Lustre, http://www.lustre.org.
  10  *
  11  *   Lustre is free software; you can redistribute it and/or
  12  *   modify it under the terms of version 2 of the GNU General Public
  13  *   License as published by the Free Software Foundation.
  14  *
  15  *   Lustre is distributed in the hope that it will be useful,
  16  *   but WITHOUT ANY WARRANTY; without even the implied warranty of
  17  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18  *   GNU General Public License for more details.
  19  *
  20  *   You should have received a copy of the GNU General Public License
  21  *   along with Lustre; if not, write to the Free Software
  22  *   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  23  */
  24
  25 #ifndef EXPORT_SYMTAB
  26 # define EXPORT_SYMTAB
  27 #endif
  28 #define DEBUG_SUBSYSTEM S_LOV
  29 #ifdef __KERNEL__
  30 #include <linux/slab.h>
  31 #include <linux/module.h>
  32 #include <linux/init.h>
  33 #include <linux/slab.h>
  34 #include <linux/pagemap.h>
  35 #include <linux/seq_file.h>
  36 #include <asm/div64.h>
  37 #else
  38 #include <liblustre.h>
  39 #endif
  40
  41 #include <linux/obd_support.h>
  42 #include <linux/lustre_lib.h>
  43 #include <linux/lustre_net.h>
  44 #include <linux/lustre_idl.h>
  45 #include <linux/lustre_dlm.h>
  46 #include <linux/lustre_mds.h>
  47 #include <linux/obd_class.h>
  48 #include <linux/obd_lov.h>
  49 #include <linux/obd_ost.h>
  50 #include <linux/lprocfs_status.h>
  51 #include <linux/lustre_audit.h>
  52 #include "lov_internal.h"
  53
  54 /* obd methods */
  55 #define MAX_STRING_SIZE 128
  56 static int lov_connect_obd(struct obd_device *obd, struct lov_tgt_desc *tgt,
  57                            int activate, struct obd_connect_data *conn_data,
  58                            unsigned long connect_flags)
  59 {
  60         struct obd_uuid lov_osc_uuid = { "LOV_OSC_UUID" };
  61         struct obd_uuid *tgt_uuid = &tgt->uuid;
  62
  63 #ifdef __KERNEL__
  64         struct proc_dir_entry *lov_proc_dir;
  65 #endif
  66         struct lov_obd *lov = &obd->u.lov;
  67         struct lustre_handle conn = {0, };
  68         struct obd_device *tgt_obd;
  69         int rc;
  70         ENTRY;
  71
  72         tgt_obd = class_find_client_obd(tgt_uuid, OBD_OSC_DEVICENAME,
  73                                         &obd->obd_uuid);
  74
  75         if (!tgt_obd) {
  76                 CERROR("Target %s not attached\n", tgt_uuid->uuid);
  77                 RETURN(-EINVAL);
  78         }
  79
  80         if (!tgt_obd->obd_set_up) {
  81                 CERROR("Target %s not set up\n", tgt_uuid->uuid);
  82                 RETURN(-EINVAL);
  83         }
  84
  85         if (activate) {
  86                 tgt_obd->obd_no_recov = 0;
  87                 ptlrpc_activate_import(tgt_obd->u.cli.cl_import);
  88         }
  89
  90         if (tgt_obd->u.cli.cl_import->imp_invalid) {
  91                 CERROR("not connecting OSC %s; administratively "
  92                        "disabled\n", tgt_uuid->uuid);
  93                 rc = obd_register_observer(tgt_obd, obd);
  94                 if (rc) {
  95                         CERROR("Target %s register_observer error %d; "
  96                                "will not be able to reactivate\n",
  97                                tgt_uuid->uuid, rc);
  98                 }
  99                 RETURN(0);
 100         }
 101
 102         rc = obd_connect(&conn, tgt_obd, &lov_osc_uuid, conn_data,
 103                          connect_flags);
 104         if (rc) {
 105                 CERROR("Target %s connect error %d\n", tgt_uuid->uuid, rc);
 106                 RETURN(rc);
 107         }
 108         tgt->ltd_exp = class_conn2export(&conn);
 109
 110         rc = obd_register_observer(tgt_obd, obd);
 111         if (rc) {
 112                 CERROR("Target %s register_observer error %d\n",
 113                        tgt_uuid->uuid, rc);
 114                 obd_disconnect(tgt->ltd_exp, 0);
 115                 tgt->ltd_exp = NULL;
 116                 RETURN(rc);
 117         }
 118
 119         lov_tgt_set_flags(lov, tgt, LTD_ACTIVE);
 120
 121 #ifdef __KERNEL__
 122         lov_proc_dir = lprocfs_srch(obd->obd_proc_entry, "target_obds");
 123         if (lov_proc_dir) {
 124                 struct obd_device *osc_obd = class_conn2obd(&conn);
 125                 struct proc_dir_entry *osc_symlink;
 126                 char name[MAX_STRING_SIZE + 1];
 127
 128                 LASSERT(osc_obd != NULL);
 129                 LASSERT(osc_obd->obd_type != NULL);
 130                 LASSERT(osc_obd->obd_type->typ_name != NULL);
 131                 name[MAX_STRING_SIZE] = '\0';
 132                 snprintf(name, MAX_STRING_SIZE, "../../../%s/%s",
 133                          osc_obd->obd_type->typ_name,
 134                          osc_obd->obd_name);
 135                 osc_symlink = proc_symlink(osc_obd->obd_name, lov_proc_dir,
 136                                            name);
 137                 if (osc_symlink == NULL) {
 138                         CERROR("could not register LOV target "
 139                                "/proc/fs/lustre/%s/%s/target_obds/%s\n",
 140                                obd->obd_type->typ_name, obd->obd_name,
 141                                osc_obd->obd_name);
 142                         lprocfs_remove(lov_proc_dir);
 143                         lov_proc_dir = NULL;
 144                 }
 145         }
 146 #endif
 147
 148         RETURN(0);
 149 }
 150
 151 static int lov_connect(struct lustre_handle *conn, struct obd_device *obd,
 152                        struct obd_uuid *cluuid, struct obd_connect_data *data,
 153                        unsigned long flags)
 154 {
 155 #ifdef __KERNEL__
 156         struct proc_dir_entry *lov_proc_dir;
 157 #endif
 158         struct lov_obd *lov = &obd->u.lov;
 159         struct lov_tgt_desc *tgt;
 160         struct obd_export *exp;
 161         int rc, rc2, i;
 162         ENTRY;
 163
 164         rc = class_connect(conn, obd, cluuid);
 165         if (rc)
 166                 RETURN(rc);
 167
 168         exp = class_conn2export(conn);
 169
 170         /* We don't want to actually do the underlying connections more than
 171          * once, so keep track. */
 172         lov->refcount++;
 173         if (lov->refcount > 1) {
 174                 class_export_put(exp);
 175                 RETURN(0);
 176         }
 177
 178 #ifdef __KERNEL__
 179         lov_proc_dir = lprocfs_register("target_obds", obd->obd_proc_entry,
 180                                         NULL, NULL);
 181         if (IS_ERR(lov_proc_dir)) {
 182                 CERROR("could not register /proc/fs/lustre/%s/%s/target_obds.",
 183                        obd->obd_type->typ_name, obd->obd_name);
 184                 lov_proc_dir = NULL;
 185         }
 186 #endif
 187
 188         /* connect_flags is the MDS number, save for use in lov_add_obd */
 189         lov->lov_connect_flags = flags;
 190         for (i = 0, tgt = lov->tgts; i < lov->desc.ld_tgt_count; i++, tgt++) {
 191                 if (obd_uuid_empty(&tgt->uuid))
 192                         continue;
 193                 rc = lov_connect_obd(obd, tgt, 0, data, flags);
 194                 if (rc)
 195                         GOTO(out_disc, rc);
 196         }
 197
 198         class_export_put(exp);
 199         RETURN (0);
 200
 201  out_disc:
 202 #ifdef __KERNEL__
 203         if (lov_proc_dir)
 204                 lprocfs_remove(lov_proc_dir);
 205 #endif
 206
 207         while (i-- > 0) {
 208                 struct obd_uuid uuid;
 209                 --tgt;
 210                 lov_tgt_clear_flags(lov, tgt, LTD_ACTIVE);
 211
 212                 /* save for CERROR below; (we know it's terminated) */
 213                 uuid = tgt->uuid;
 214                 rc2 = obd_disconnect(tgt->ltd_exp, 0);
 215                 if (rc2)
 216                         CERROR("error: LOV target %s disconnect on OST idx %d: "
 217                                "rc = %d\n", uuid.uuid, i, rc2);
 218         }
 219         class_disconnect(exp, 0);
 220         RETURN (rc);
 221 }
 222
 223 static int lov_disconnect_obd(struct obd_device *obd,
 224                               struct lov_tgt_desc *tgt,
 225                               unsigned long flags)
 226 {
 227 #ifdef __KERNEL__
 228         struct proc_dir_entry *lov_proc_dir;
 229 #endif
 230         struct obd_device *osc_obd = class_exp2obd(tgt->ltd_exp);
 231         struct lov_obd *lov = &obd->u.lov;
 232         int rc;
 233         ENTRY;
 234
 235 #ifdef __KERNEL__
 236         lov_proc_dir = lprocfs_srch(obd->obd_proc_entry, "target_obds");
 237         if (lov_proc_dir) {
 238                 struct proc_dir_entry *osc_symlink;
 239
 240                 osc_symlink = lprocfs_srch(lov_proc_dir, osc_obd->obd_name);
 241                 if (osc_symlink) {
 242                         lprocfs_remove(osc_symlink);
 243                 } else {
 244                         CERROR("/proc/fs/lustre/%s/%s/target_obds/%s missing\n",
 245                                obd->obd_type->typ_name, obd->obd_name,
 246                                osc_obd->obd_name);
 247                 }
 248         }
 249 #endif
 250         if (obd->obd_no_recov) {
 251                 /* Pass it on to our clients.
 252                  * XXX This should be an argument to disconnect,
 253                  * XXX not a back-door flag on the OBD.  Ah well.
 254                  */
 255                 if (osc_obd)
 256                         osc_obd->obd_no_recov = 1;
 257         }
 258
 259         /* XXX - shouldn't this be after the obd_disconnect() ? */
 260         obd_register_observer(tgt->ltd_exp->exp_obd, NULL);
 261
 262         rc = obd_disconnect(tgt->ltd_exp, flags);
 263         if (rc) {
 264                 if (lov_tgt_active(lov, tgt, 0)) {
 265                         lov_tgt_decref(lov, tgt);
 266                         CERROR("Target %s disconnect error %d\n",
 267                                tgt->uuid.uuid, rc);
 268                 }
 269         }
 270
 271         CDEBUG(D_CONFIG, "idx: %d flags: 0x%x active: %d\n",
 272                tgt - lov->tgts, tgt->ltd_flags,
 273                lov->desc.ld_active_tgt_count);
 274
 275         lov_tgt_clear_flags(lov, tgt, LTD_ACTIVE);
 276         tgt->ltd_exp = NULL;
 277         RETURN(0);
 278 }
 279
 280 static int lov_disconnect(struct obd_export *exp, unsigned long flags)
 281 {
 282         struct obd_device *obd = class_exp2obd(exp);
 283 #ifdef __KERNEL__
 284         struct proc_dir_entry *lov_proc_dir;
 285 #endif
 286         struct lov_obd *lov = &obd->u.lov;
 287         struct lov_tgt_desc *tgt;
 288         int rc, i;
 289         ENTRY;
 290
 291         if (!lov->tgts)
 292                 goto out_local;
 293
 294         /* Only disconnect the underlying layers on the final disconnect. */
 295         lov->refcount--;
 296         if (lov->refcount != 0)
 297                 goto out_local;
 298
 299         for (i = 0, tgt = lov->tgts; i < lov->desc.ld_tgt_count; i++, tgt++) {
 300                 if (tgt->ltd_exp)
 301                         lov_disconnect_obd(obd, tgt, flags);
 302         }
 303
 304 #ifdef __KERNEL__
 305         lov_proc_dir = lprocfs_srch(obd->obd_proc_entry, "target_obds");
 306         if (lov_proc_dir) {
 307                 lprocfs_remove(lov_proc_dir);
 308         } else {
 309                 CERROR("/proc/fs/lustre/%s/%s/target_obds missing.",
 310                        obd->obd_type->typ_name, obd->obd_name);
 311         }
 312 #endif
 313
 314  out_local:
 315         rc = class_disconnect(exp, 0);
 316         RETURN(rc);
 317 }
 318
 319 /* Error codes:
 320  *
 321  *  -EINVAL  : UUID can't be found in the LOV's target list
 322  *  -ENOTCONN: The UUID is found, but the target connection is bad (!)
 323  *  -EBADF   : The UUID is found, but the OBD is the wrong type (!)
 324  */
 325 static int lov_set_osc_active(struct lov_obd *lov, struct obd_uuid *uuid,
 326                               int activate)
 327 {
 328         struct lov_tgt_desc *tgt;
 329         int i, rc = 0;
 330         ENTRY;
 331
 332         CDEBUG(D_INFO, "Searching in lov %p for uuid %s (activate=%d)\n",
 333                lov, uuid->uuid, activate);
 334
 335         lov_tgts_lock(lov);
 336         for (i = 0, tgt = lov->tgts; i < lov->desc.ld_tgt_count; i++, tgt++) {
 337                 if (tgt->ltd_exp == NULL)
 338                         continue;
 339
 340                 CDEBUG(D_INFO, "lov idx %d is %s conn "LPX64"\n",
 341                        i, tgt->uuid.uuid, tgt->ltd_exp->exp_handle.h_cookie);
 342
 343                 if (obd_uuid_equals(uuid, &tgt->uuid))
 344                         break;
 345         }
 346
 347         if (i == lov->desc.ld_tgt_count)
 348                 GOTO(out, rc = -EINVAL);
 349
 350         if (activate) {
 351                 if (tgt->ltd_flags & LTD_ACTIVE) {
 352                         CDEBUG(D_CONFIG|D_INFO, "OSC %s already active!\n",
 353                                uuid->uuid);
 354                         GOTO(out, rc);
 355                 }
 356                 CDEBUG(D_INFO, "Marking OSC %s active\n", uuid->uuid);
 357                 tgt->ltd_flags |= LTD_ACTIVE;
 358                 lov->desc.ld_active_tgt_count++;
 359         } else {
 360                 if ((tgt->ltd_flags & LTD_ACTIVE) == 0) {
 361                         CDEBUG(D_CONFIG|D_INFO, "OSC %s already inactive!\n",
 362                                uuid->uuid);
 363                         GOTO(out, rc);
 364                 }
 365                 CDEBUG(D_INFO, "Marking OSC %s inactive\n", uuid->uuid);
 366                 tgt->ltd_flags &= ~LTD_ACTIVE;
 367                 lov->desc.ld_active_tgt_count--;
 368         }
 369
 370         EXIT;
 371  out:
 372         lov_tgts_unlock(lov);
 373         return rc;
 374 }
 375
 376 static int lov_notify(struct obd_device *obd, struct obd_device *watched,
 377                       int active, void *data)
 378 {
 379         struct obd_uuid *uuid;
 380         int rc;
 381         ENTRY;
 382
 383         if (strcmp(watched->obd_type->typ_name, OBD_OSC_DEVICENAME)) {
 384                 CERROR("unexpected notification of %s %s!\n",
 385                        watched->obd_type->typ_name,
 386                        watched->obd_name);
 387                 return -EINVAL;
 388         }
 389
 390         uuid = &watched->u.cli.cl_import->imp_target_uuid;
 391
 392         /* Set OSC as active before notifying the observer, so the
 393          * observer can use the OSC normally.
 394          */
 395         rc = lov_set_osc_active(&obd->u.lov, uuid, active);
 396         if (rc) {
 397                 CERROR("%sactivation of %s failed: %d\n",
 398                        active ? "" : "de", uuid->uuid, rc);
 399                 RETURN(rc);
 400         }
 401
 402         if (obd->obd_observer)
 403                 /* Pass the notification up the chain. */
 404                 rc = obd_notify(obd->obd_observer, watched, active, data);
 405
 406         RETURN(rc);
 407 }
 408
 409 int lov_attach(struct obd_device *dev, obd_count len, void *data)
 410 {
 411         struct lprocfs_static_vars lvars;
 412         int rc;
 413
 414         lprocfs_init_vars(lov, &lvars);
 415         rc = lprocfs_obd_attach(dev, lvars.obd_vars);
 416         if (rc == 0) {
 417 #ifdef __KERNEL__
 418                 struct proc_dir_entry *entry;
 419
 420                 entry = create_proc_entry("target_obd_status", 0444,
 421                                           dev->obd_proc_entry);
 422                 if (entry == NULL) {
 423                         rc = -ENOMEM;
 424                 } else {
 425                         entry->proc_fops = &lov_proc_target_fops;
 426                         entry->data = dev;
 427                 }
 428 #endif
 429         }
 430         return rc;
 431 }
 432
 433 int lov_detach(struct obd_device *dev)
 434 {
 435         return lprocfs_obd_detach(dev);
 436 }
 437
 438 static int lov_setup(struct obd_device *obd, obd_count len, void *buf)
 439 {
 440         struct lov_obd *lov = &obd->u.lov;
 441         struct lustre_cfg *lcfg = buf;
 442         struct lov_desc *desc;
 443         int count;
 444         ENTRY;
 445
 446         if (LUSTRE_CFG_BUFLEN(lcfg, 1) < 1) {
 447                 CERROR("LOV setup requires a descriptor\n");
 448                 RETURN(-EINVAL);
 449         }
 450
 451         desc = (struct lov_desc *)lustre_cfg_string(lcfg, 1);
 452         if (sizeof(*desc) > LUSTRE_CFG_BUFLEN(lcfg, 1)) {
 453                 CERROR("descriptor size wrong: %d > %d\n",
 454                        (int)sizeof(*desc), LUSTRE_CFG_BUFLEN(lcfg, 1));
 455                 RETURN(-EINVAL);
 456         }
 457
 458         /* Because of 64-bit divide/mod operations only work with a 32-bit
 459          * divisor in a 32-bit kernel, we cannot support a stripe width
 460          * of 4GB or larger on 32-bit CPUs.
 461          */
 462
 463         count = desc->ld_default_stripe_count;
 464         if (count && (count * desc->ld_default_stripe_size) > ~0UL) {
 465                 CERROR("LOV: stripe width "LPU64"x%u > %lu on 32-bit system\n",
 466                        desc->ld_default_stripe_size, count, ~0UL);
 467                 RETURN(-EINVAL);
 468         }
 469
 470         lov->bufsize = sizeof(struct lov_tgt_desc) * LOV_MAX_TGT_COUNT;
 471         OBD_ALLOC(lov->tgts, lov->bufsize);
 472         if (lov->tgts == NULL) {
 473                 lov->bufsize = 0;
 474                 CERROR("couldn't allocate %d bytes for target table.\n",
 475                        lov->bufsize);
 476                 RETURN(-EINVAL);
 477         }
 478
 479         desc->ld_tgt_count = 0;
 480         desc->ld_active_tgt_count = 0;
 481         lov->desc = *desc;
 482         spin_lock_init(&lov->lov_lock);
 483         sema_init(&lov->lov_llog_sem, 1);
 484         init_waitqueue_head(&lov->lov_tgt_waitq);
 485
 486         RETURN(0);
 487 }
 488
 489 static int lov_cleanup(struct obd_device *obd, int flags)
 490 {
 491         struct lov_obd *lov = &obd->u.lov;
 492
 493         OBD_FREE(lov->tgts, lov->bufsize);
 494         RETURN(0);
 495 }
 496
 497 static int
 498 lov_add_obd(struct obd_device *obd, struct obd_uuid *uuidp, int index, int gen)
 499 {
 500         struct lov_obd *lov = &obd->u.lov;
 501         struct lov_tgt_desc *tgt;
 502         int rc;
 503         ENTRY;
 504
 505         CDEBUG(D_CONFIG, "uuid: %s idx: %d gen: %d\n",
 506                uuidp->uuid, index, gen);
 507
 508         if ((index < 0) || (index >= LOV_MAX_TGT_COUNT)) {
 509                 CERROR("request to add OBD %s at invalid index: %d\n",
 510                        uuidp->uuid, index);
 511                 RETURN(-EINVAL);
 512         }
 513
 514         if (gen <= 0) {
 515                 CERROR("request to add OBD %s with invalid generation: %d\n",
 516                        uuidp->uuid, gen);
 517                 RETURN(-EINVAL);
 518         }
 519
 520         tgt = lov->tgts + index;
 521
 522         lov_tgts_lock(lov);
 523
 524         if (!obd_uuid_empty(&tgt->uuid)) {
 525                 lov_tgts_unlock(lov);
 526                 CERROR("OBD already assigned at LOV target index %d\n",
 527                        index);
 528                 RETURN(-EEXIST);
 529         }
 530
 531         tgt->uuid = *uuidp;
 532         /* XXX - add a sanity check on the generation number. */
 533         tgt->ltd_gen = gen;
 534         tgt->ltd_flags = 0;
 535
 536         if (index >= lov->desc.ld_tgt_count)
 537                 lov->desc.ld_tgt_count = index + 1;
 538
 539         lov_tgts_unlock(lov);
 540
 541         CDEBUG(D_CONFIG, "idx: %d ltd_gen: %d ld_tgt_count: %d\n",
 542                 index, tgt->ltd_gen, lov->desc.ld_tgt_count);
 543
 544         if (lov->refcount == 0)
 545                 RETURN(0);
 546
 547         /* We don't need to lock the tgt entry here because the
 548          * config events are single threaded. Therefore only the
 549          * current thread can be changing the tgts tbl. */
 550         if (tgt->ltd_exp) {
 551                 struct obd_device *osc_obd;
 552
 553                 osc_obd = class_exp2obd(tgt->ltd_exp);
 554                 if (osc_obd)
 555                         osc_obd->obd_no_recov = 0;
 556         }
 557
 558         rc = lov_connect_obd(obd, tgt, 0, NULL, lov->lov_connect_flags);
 559         if (rc)
 560                 GOTO(out, rc);
 561
 562         if (obd->obd_observer) {
 563                 /* tell the mds_lov about the new target */
 564                 rc = obd_notify(obd->obd_observer, tgt->ltd_exp->exp_obd, 1,
 565                                 (void *)index);
 566         }
 567
 568         GOTO(out, rc);
 569  out:
 570         if (rc && tgt->ltd_exp != NULL)
 571                 lov_disconnect_obd(obd, tgt, 0);
 572         return rc;
 573 }
 574
 575 static int
 576 lov_del_obd(struct obd_device *obd, struct obd_uuid *uuidp, int index, int gen)
 577 {
 578         struct lov_obd *lov = &obd->u.lov;
 579         struct lov_tgt_desc *tgt;
 580         struct l_wait_info lwi = { 0 };
 581         int count = lov->desc.ld_tgt_count;
 582         int rc = 0;
 583         ENTRY;
 584
 585         CDEBUG(D_CONFIG, "uuid: %s idx: %d gen: %d\n",
 586                uuidp->uuid, index, gen);
 587
 588         if (index >= count) {
 589                 CERROR("LOV target index %d >= number of LOV OBDs %d.\n",
 590                        index, count);
 591                 RETURN(-EINVAL);
 592         }
 593
 594         tgt = lov->tgts + index;
 595
 596         if (obd_uuid_empty(&tgt->uuid)) {
 597                 CERROR("LOV target at index %d is not setup.\n", index);
 598                 RETURN(-EINVAL);
 599         }
 600
 601         if (!obd_uuid_equals(uuidp, &tgt->uuid)) {
 602                 CERROR("LOV target UUID %s at index %d doesn't match %s.\n",
 603                        tgt->uuid.uuid, index, uuidp->uuid);
 604                 RETURN(-EINVAL);
 605         }
 606
 607         lov_tgt_set_flags(lov, tgt, LTD_DEL_PENDING);
 608
 609         if (tgt->ltd_exp) {
 610                 struct obd_device *osc_obd;
 611
 612                 rc = obd_cancel_unused(tgt->ltd_exp, NULL,
 613                                        LDLM_FL_CONFIG_CHANGE, NULL);
 614                 if (rc != 0)
 615                         CWARN("obd_cancel_unused(osc): %d\n", rc);
 616
 617                 osc_obd = class_exp2obd(tgt->ltd_exp);
 618                 if (osc_obd) {
 619                         osc_obd->obd_no_recov = 1;
 620                         rc = obd_llog_finish(osc_obd, &osc_obd->obd_llogs, 1);
 621                         if (rc)
 622                                 CERROR("osc_llog_finish error: %d\n", rc);
 623                 }
 624
 625                 lov_disconnect_obd(obd, tgt, 0);
 626         }
 627
 628         CDEBUG(D_CONFIG, "Sleeping until LOV target index %d UUID %s "
 629                "is quiesced; ltd_refcount: %d ld_active_tgt_count: %d.\n",
 630                index, uuidp->uuid, tgt->ltd_refcount,
 631                lov->desc.ld_active_tgt_count);
 632
 633         /* XXX - should we set a timeout ? */
 634         lwi = LWI_TIMEOUT_INTR(0, NULL, NULL, NULL);
 635         rc = l_wait_event(lov->lov_tgt_waitq, (tgt->ltd_refcount == 0), &lwi);
 636         if (rc) {
 637                 lov_tgt_clear_flags(lov, tgt, LTD_DEL_PENDING);
 638                 CERROR("LOV target delete UUID %s index %d aborted: %d.\n",
 639                        uuidp->uuid, index, rc);
 640                 RETURN(rc);
 641         }
 642
 643         CDEBUG(D_CONFIG, "LOV target index %d UUID %s is quiesced; "
 644                "ltd_refcount: %d ld_active_tgt_count: %d.\n",
 645                index, uuidp->uuid, tgt->ltd_refcount,
 646                lov->desc.ld_active_tgt_count);
 647
 648         /* XXX - right now there is a dependency on ld_tgt_count being the
 649          * maximum tgt index for computing the mds_max_easize. So we can't
 650          * shrink it. */
 651
 652         /* lt_gen = 0 will mean it will not match the gen of any valid loi */
 653         memset(tgt, 0, sizeof(*tgt));
 654         RETURN(rc);
 655 }
 656
 657 static int lov_process_config(struct obd_device *obd, obd_count len, void *buf)
 658 {
 659         struct lustre_cfg *lcfg = buf;
 660         struct obd_uuid obd_uuid;
 661         int cmd;
 662         int index;
 663         int gen;
 664         int rc = 0;
 665         ENTRY;
 666
 667         switch(cmd = lcfg->lcfg_command) {
 668         case LCFG_LOV_ADD_OBD:
 669         case LCFG_LOV_DEL_OBD: {
 670                 if (LUSTRE_CFG_BUFLEN(lcfg, 1) > sizeof(obd_uuid.uuid))
 671                         GOTO(out, rc = -EINVAL);
 672
 673                 obd_str2uuid(&obd_uuid, lustre_cfg_string(lcfg, 1));
 674
 675                 if (sscanf(lustre_cfg_buf(lcfg, 2), "%d", &index) != 1)
 676                         GOTO(out, rc = -EINVAL);
 677                 if (sscanf(lustre_cfg_buf(lcfg, 3), "%d", &gen) != 1)
 678                         GOTO(out, rc = -EINVAL);
 679                 if (cmd == LCFG_LOV_ADD_OBD)
 680                         rc = lov_add_obd(obd, &obd_uuid, index, gen);
 681                 else
 682                         rc = lov_del_obd(obd, &obd_uuid, index, gen);
 683                 GOTO(out, rc);
 684         }
 685         default: {
 686                 CERROR("Unknown command: %d\n", lcfg->lcfg_command);
 687                 GOTO(out, rc = -EINVAL);
 688
 689         }
 690         }
 691 out:
 692         RETURN(rc);
 693 }
 694
 695 #ifndef log2
 696 #define log2(n) ffz(~(n))
 697 #endif
 698
 699 static int lov_clear_orphans(struct obd_export *export,
 700                              struct obdo *src_oa,
 701                              struct lov_stripe_md **ea,
 702                              struct obd_trans_info *oti)
 703 {
 704         struct lov_obd *lov;
 705         struct obdo *tmp_oa;
 706         struct obd_uuid *ost_uuid = NULL;
 707         struct lov_tgt_desc *tgt;
 708         int rc = 0, i;
 709         ENTRY;
 710
 711         LASSERT(src_oa->o_valid & OBD_MD_FLFLAGS &&
 712                 src_oa->o_flags == OBD_FL_DELORPHAN);
 713
 714         lov = &export->exp_obd->u.lov;
 715
 716         tmp_oa = obdo_alloc();
 717         if (tmp_oa == NULL)
 718                 RETURN(-ENOMEM);
 719
 720         if (src_oa->o_valid & OBD_MD_FLINLINE) {
 721                 ost_uuid = (struct obd_uuid *)src_oa->o_inline;
 722                 CDEBUG(D_HA, "clearing orphans only for %s\n",
 723                        ost_uuid->uuid);
 724         }
 725
 726         for (i = 0, tgt = lov->tgts; i < lov->desc.ld_tgt_count; i++, tgt++) {
 727                 struct lov_stripe_md obj_md;
 728                 struct lov_stripe_md *obj_mdp = &obj_md;
 729                 int active = 0;
 730                 int err;
 731
 732                 /* if called for a specific target, we don't
 733                    care if it is not active. */
 734                 if (lov_tgt_active(lov, tgt, 0)) {
 735                         active = 1;
 736                 } else if (ost_uuid == NULL) {
 737                         CDEBUG(D_HA, "lov idx %d inactive\n", i);
 738                         continue;
 739                 }
 740
 741                 if (ost_uuid && !obd_uuid_equals(ost_uuid, &tgt->uuid)) {
 742                         if (active)
 743                                 lov_tgt_decref(lov, tgt);
 744                         continue;
 745                 }
 746
 747                 /*
 748                  * setting up objid OSS objects should be destroyed starting
 749                  * from it.
 750                  */
 751                 memcpy(tmp_oa, src_oa, sizeof(*tmp_oa));
 752                 tmp_oa->o_valid |= OBD_MD_FLID;
 753                 tmp_oa->o_id = oti->oti_objid[i];
 754
 755                 /* XXX: LOV STACKING: use real "obj_mdp" sub-data */
 756                 err = obd_create(tgt->ltd_exp, tmp_oa, NULL, 0, &obj_mdp, oti);
 757                 if (err)
 758                         /* This export will be disabled until it is recovered,
 759                            and then orphan recovery will be completed. */
 760                         CERROR("error in orphan recovery on OST idx %d/%d: "
 761                                "rc = %d\n", i, lov->desc.ld_tgt_count, err);
 762
 763                 if (active)
 764                         lov_tgt_decref(lov, tgt);
 765
 766                 if (ost_uuid)
 767                         break;
 768         }
 769
 770         obdo_free(tmp_oa);
 771         RETURN(rc);
 772 }
 773
 774 /* the LOV expects oa->o_id to be set to the LOV object id */
 775 static int
 776 lov_create(struct obd_export *exp, struct obdo *src_oa,
 777            void *acl, int acl_size, struct lov_stripe_md **ea,
 778            struct obd_trans_info *oti)
 779 {
 780         struct lov_request_set *set = NULL;
 781         struct list_head *pos;
 782         struct lov_obd *lov;
 783         int rc = 0;
 784         ENTRY;
 785
 786         LASSERT(ea != NULL);
 787         if (exp == NULL)
 788                 RETURN(-EINVAL);
 789
 790         if ((src_oa->o_valid & OBD_MD_FLFLAGS) &&
 791             src_oa->o_flags == OBD_FL_DELORPHAN) {
 792                 rc = lov_clear_orphans(exp, src_oa, ea, oti);
 793                 RETURN(rc);
 794         }
 795
 796         LASSERT(oti->oti_flags & OBD_MODE_CROW);
 797
 798         /* main creation loop */
 799         rc = lov_prep_create_set(exp, ea, src_oa, oti, &set);
 800         if (rc)
 801                 RETURN(rc);
 802
 803         lov = &exp->exp_obd->u.lov;
 804
 805         list_for_each (pos, &set->set_list) {
 806                 struct lov_request *req =
 807                         list_entry(pos, struct lov_request, rq_link);
 808
 809                 /* XXX: LOV STACKING: use real "obj_mdp" sub-data */
 810                 rc = obd_create(lov->tgts[req->rq_idx].ltd_exp,
 811                                 req->rq_oa, NULL, 0, &req->rq_md, oti);
 812                 lov_update_create_set(set, req, rc);
 813         }
 814         rc = lov_fini_create_set(set, ea);
 815         RETURN(rc);
 816 }
 817
 818 #define lsm_bad_magic(LSMP)                                     \
 819 ({                                                              \
 820         struct lov_stripe_md *_lsm__ = (LSMP);                  \
 821         int _ret__ = 0;                                         \
 822         if (!_lsm__) {                                          \
 823                 CERROR("LOV requires striping ea\n");           \
 824                 _ret__ = 1;                                     \
 825         } else if (_lsm__->lsm_magic != LOV_MAGIC) {            \
 826                 CERROR("LOV striping magic bad %#x != %#x\n",   \
 827                        _lsm__->lsm_magic, LOV_MAGIC);           \
 828                 _ret__ = 1;                                     \
 829         }                                                       \
 830         _ret__;                                                 \
 831 })
 832
 833 static int lov_destroy(struct obd_export *exp, struct obdo *oa,
 834                        struct lov_stripe_md *lsm, struct obd_trans_info *oti)
 835 {
 836         struct lov_request_set *set;
 837         struct lov_request *req;
 838         struct list_head *pos;
 839         struct lov_obd *lov;
 840         int rc = 0;
 841         ENTRY;
 842
 843         if (lsm_bad_magic(lsm))
 844                 RETURN(-EINVAL);
 845
 846         if (!exp || !exp->exp_obd)
 847                 RETURN(-ENODEV);
 848
 849         lov = &exp->exp_obd->u.lov;
 850         rc = lov_prep_destroy_set(exp, oa, lsm, oti, &set);
 851         if (rc)
 852                 RETURN(rc);
 853
 854         list_for_each (pos, &set->set_list) {
 855                 int err;
 856                 req = list_entry(pos, struct lov_request, rq_link);
 857
 858                 /* XXX update the cookie position */
 859                 oti->oti_logcookies = set->set_cookies + req->rq_stripe;
 860                 rc = obd_destroy(lov->tgts[req->rq_idx].ltd_exp, req->rq_oa,
 861                                  NULL, oti);
 862                 err = lov_update_common_set(set, req, rc);
 863                 if (rc) {
 864                         CERROR("error: destroying objid "LPX64" subobj "
 865                                LPX64" on OST idx %d: rc = %d\n",
 866                                set->set_oa->o_id, req->rq_oa->o_id,
 867                                req->rq_idx, rc);
 868                         if (!rc)
 869                                 rc = err;
 870                 }
 871         }
 872         lov_fini_destroy_set(set);
 873         RETURN(rc);
 874 }
 875
 876 static int lov_getattr(struct obd_export *exp, struct obdo *oa,
 877                        struct lov_stripe_md *lsm)
 878 {
 879         struct lov_request_set *set;
 880         struct lov_request *req;
 881         struct list_head *pos;
 882         struct lov_obd *lov;
 883         int err = 0, rc = 0;
 884         ENTRY;
 885
 886         if (lsm_bad_magic(lsm))
 887                 RETURN(-EINVAL);
 888
 889         if (!exp || !exp->exp_obd)
 890                 RETURN(-ENODEV);
 891
 892         lov = &exp->exp_obd->u.lov;
 893
 894         rc = lov_prep_getattr_set(exp, oa, lsm, &set);
 895         if (rc)
 896                 RETURN(rc);
 897
 898         list_for_each (pos, &set->set_list) {
 899                 req = list_entry(pos, struct lov_request, rq_link);
 900
 901                 CDEBUG(D_INFO, "objid "LPX64"[%d] has subobj "LPX64" at idx "
 902                        "%u\n", oa->o_id, req->rq_stripe, req->rq_oa->o_id,
 903                        req->rq_idx);
 904
 905                 rc = obd_getattr(lov->tgts[req->rq_idx].ltd_exp,
 906                                  req->rq_oa, NULL);
 907                 err = lov_update_common_set(set, req, rc);
 908                 if (err) {
 909                         CERROR("error: getattr objid "LPX64" subobj "
 910                                LPX64" on OST idx %d: rc = %d\n",
 911                                set->set_oa->o_id, req->rq_oa->o_id,
 912                                req->rq_idx, err);
 913                         break;
 914                 }
 915         }
 916
 917         rc = lov_fini_getattr_set(set);
 918         if (err)
 919                 rc = err;
 920         RETURN(rc);
 921 }
 922
 923 static int lov_getattr_interpret(struct ptlrpc_request_set *rqset, void *data,
 924                                  int rc)
 925 {
 926         struct lov_request_set *lovset = (struct lov_request_set *)data;
 927         ENTRY;
 928
 929         /* don't do attribute merge if this aysnc op failed */
 930         if (rc) {
 931                 lovset->set_completes = 0;
 932                 lov_fini_getattr_set(lovset);
 933         } else {
 934                 rc = lov_fini_getattr_set(lovset);
 935         }
 936         RETURN (rc);
 937 }
 938
 939 static int lov_getattr_async(struct obd_export *exp, struct obdo *oa,
 940                               struct lov_stripe_md *lsm,
 941                               struct ptlrpc_request_set *rqset)
 942 {
 943         struct lov_request_set *lovset;
 944         struct lov_obd *lov;
 945         struct list_head *pos;
 946         struct lov_request *req;
 947         int rc = 0;
 948         ENTRY;
 949
 950         if (lsm_bad_magic(lsm))
 951                 RETURN(-EINVAL);
 952
 953         if (!exp || !exp->exp_obd)
 954                 RETURN(-ENODEV);
 955
 956         lov = &exp->exp_obd->u.lov;
 957
 958         rc = lov_prep_getattr_set(exp, oa, lsm, &lovset);
 959         if (rc)
 960                 RETURN(rc);
 961
 962         CDEBUG(D_INFO, "objid "LPX64": %ux%u byte stripes\n",
 963                lsm->lsm_object_id, lsm->lsm_stripe_count, lsm->lsm_stripe_size);
 964
 965         list_for_each (pos, &lovset->set_list) {
 966                 req = list_entry(pos, struct lov_request, rq_link);
 967
 968                 CDEBUG(D_INFO, "objid "LPX64"[%d] has subobj "LPX64" at idx "
 969                        "%u\n", oa->o_id, req->rq_stripe, req->rq_oa->o_id,
 970                        req->rq_idx);
 971                 rc = obd_getattr_async(lov->tgts[req->rq_idx].ltd_exp,
 972                                        req->rq_oa, NULL, rqset);
 973                 if (rc) {
 974                         CERROR("error: getattr objid "LPX64" subobj "
 975                                LPX64" on OST idx %d: rc = %d\n",
 976                                lovset->set_oa->o_id, req->rq_oa->o_id,
 977                                req->rq_idx, rc);
 978                         GOTO(out, rc);
 979                 }
 980                 lov_update_common_set(lovset, req, rc);
 981         }
 982
 983         LASSERT(rc == 0);
 984         LASSERT (rqset->set_interpret == NULL);
 985         rqset->set_interpret = lov_getattr_interpret;
 986         rqset->set_arg = (void *)lovset;
 987         RETURN(rc);
 988 out:
 989         LASSERT(rc);
 990         lov_fini_getattr_set(lovset);
 991         RETURN(rc);
 992 }
 993
 994 static int lov_setattr(struct obd_export *exp, struct obdo *src_oa,
 995                        struct lov_stripe_md *lsm, struct obd_trans_info *oti,
 996                        struct lustre_capa *capa)
 997 {
 998         struct lov_request_set *set;
 999         struct lov_obd *lov;
1000         struct list_head *pos;
1001         struct lov_request *req;
1002         int err = 0, rc = 0;
1003         ENTRY;
1004
1005         if (lsm_bad_magic(lsm))
1006                 RETURN(-EINVAL);
1007
1008         if (!exp || !exp->exp_obd)
1009                 RETURN(-ENODEV);
1010
1011         LASSERT(!(src_oa->o_valid & ~(OBD_MD_FLID|OBD_MD_FLTYPE | OBD_MD_FLMODE|
1012                                       OBD_MD_FLATIME | OBD_MD_FLMTIME |
1013                                       OBD_MD_FLCTIME | OBD_MD_FLFLAGS |
1014                                       OBD_MD_FLSIZE | OBD_MD_FLGROUP |
1015                                       OBD_MD_FLUID | OBD_MD_FLGID |
1016                                       OBD_MD_FLINLINE | OBD_MD_FLIFID)));
1017
1018         LASSERT(!(src_oa->o_valid & OBD_MD_FLGROUP) || src_oa->o_gr > 0);
1019
1020         lov = &exp->exp_obd->u.lov;
1021         rc = lov_prep_setattr_set(exp, src_oa, lsm, NULL, &set);
1022         if (rc)
1023                 RETURN(rc);
1024
1025         list_for_each (pos, &set->set_list) {
1026                 req = list_entry(pos, struct lov_request, rq_link);
1027
1028                 rc = obd_setattr(lov->tgts[req->rq_idx].ltd_exp, req->rq_oa,
1029                                  NULL, NULL, NULL);
1030                 err = lov_update_common_set(set, req, rc);
1031                 if (err) {
1032                         CERROR("error: setattr objid "LPX64" subobj "
1033                                LPX64" on OST idx %d: rc = %d\n",
1034                                set->set_oa->o_id, req->rq_oa->o_id,
1035                                req->rq_idx, err);
1036                         if (!rc)
1037                                 rc = err;
1038                 }
1039         }
1040         err = lov_fini_setattr_set(set);
1041         if (!rc)
1042                 rc = err;
1043         RETURN(rc);
1044 }
1045
1046 static int lov_revalidate_policy(struct lov_obd *lov, struct lov_stripe_md *lsm)
1047 {
1048         static int next_idx = 0;
1049         struct lov_tgt_desc *tgt;
1050         int i, count;
1051         ENTRY;
1052
1053         /* XXX - we should do something clever and take lsm
1054          * into account but just do round robin for now. */
1055
1056         /* last_idx must always be less that count because
1057          * ld_tgt_count currently cannot shrink. */
1058         count = lov->desc.ld_tgt_count;
1059
1060         for (i = next_idx, tgt = lov->tgts + i; i < count; i++, tgt++) {
1061                 if (lov_tgt_active(lov, tgt, 0)) {
1062                         next_idx = (i + 1) % count;
1063                         RETURN(i);
1064                 }
1065         }
1066
1067         for (i = 0, tgt = lov->tgts; i < next_idx; i++, tgt++) {
1068                 if (lov_tgt_active(lov, tgt, 0)) {
1069                         next_idx = (i + 1) % count;
1070                         RETURN(i);
1071                 }
1072         }
1073
1074         RETURN(-EIO);
1075 }
1076
1077 static int lov_revalidate_md(struct obd_export *exp, struct obdo *src_oa,
1078                              struct lov_stripe_md *ea,
1079                              struct obd_trans_info *oti)
1080 {
1081         struct obd_export *osc_exp;
1082         struct lov_obd *lov = &exp->exp_obd->u.lov;
1083         struct lov_stripe_md *lsm = ea;
1084         struct lov_stripe_md obj_md;
1085         struct lov_stripe_md *obj_mdp = &obj_md;
1086         struct lov_oinfo *loi;
1087         struct obdo *tmp_oa;
1088         int ost_idx, updates = 0, i;
1089         ENTRY;
1090
1091         tmp_oa = obdo_alloc();
1092         if (tmp_oa == NULL)
1093                 RETURN(-ENOMEM);
1094
1095         loi = lsm->lsm_oinfo;
1096         for (i = 0; i < lsm->lsm_stripe_count; i++, loi++) {
1097                 struct lov_tgt_desc *tgt;
1098                 int rc;
1099
1100                 if (!lov_tgt_changed(lov, loi))
1101                         continue;
1102
1103                 /* returns an active tgt. tgt->ltd_refcount is incremented. */
1104                 ost_idx = lov_revalidate_policy(lov, lsm);
1105                 if (ost_idx < 0) {
1106                         /* FIXME: punt for now. */
1107                         CERROR("lov_revalidate_policy failed; no active "
1108                                "OSCs?\n");
1109                         continue;
1110                 }
1111
1112                 /* create a new object */
1113                 memcpy(tmp_oa, src_oa, sizeof(*tmp_oa));
1114                 /* XXX: LOV STACKING: use real "obj_mdp" sub-data */
1115                 tgt = lov->tgts + ost_idx;
1116                 osc_exp = tgt->ltd_exp;
1117                 rc = obd_create(osc_exp, tmp_oa, NULL, 0, &obj_mdp, oti);
1118                 if (rc) {
1119                         lov_tgt_decref(lov, tgt);
1120                         CERROR("error creating new subobj at idx %d; "
1121                                "rc = %d\n", ost_idx, rc);
1122                         continue;
1123                 }
1124
1125                 CDEBUG(D_INODE,
1126                        "replacing idx %d gen %d objid "LPX64" subobj "LPX64" "
1127                        "with idx %d gen %d objid "LPX64" subobj "LPX64".\n",
1128                        loi->loi_ost_idx, loi->loi_ost_gen,
1129                        loi->loi_id, loi->loi_gr,
1130                        ost_idx, tgt->ltd_gen, tmp_oa->o_id, tmp_oa->o_gr);
1131
1132                 if (oti->oti_objid)
1133                         oti->oti_objid[ost_idx] = tmp_oa->o_id;
1134                 loi->loi_id = tmp_oa->o_id;
1135                 loi->loi_gr = tmp_oa->o_gr;
1136                 loi->loi_ost_idx = ost_idx;
1137                 loi->loi_ost_gen = tgt->ltd_gen;
1138                 lov_tgt_decref(lov, tgt);
1139                 updates = 1;
1140         }
1141
1142         /* If we got an error revalidating an entry there's no need to
1143          * cleanup up objects we allocated here because the bad entry
1144          * still points to a deleted OST. */
1145
1146         obdo_free(tmp_oa);
1147         RETURN(updates);
1148 }
1149
1150 /* FIXME: maybe we'll just make one node the authoritative attribute node, then
1151  * we can send this 'punch' to just the authoritative node and the nodes
1152  * that the punch will affect. */
1153 static int lov_punch(struct obd_export *exp, struct obdo *oa,
1154                      struct lov_stripe_md *lsm, obd_off start,
1155                      obd_off end, struct obd_trans_info *oti,
1156                      struct lustre_capa *capa)
1157 {
1158         struct lov_request_set *set;
1159         struct lov_obd *lov;
1160         struct list_head *pos;
1161         struct lov_request *req;
1162         int err = 0, rc = 0;
1163         ENTRY;
1164
1165         if (lsm_bad_magic(lsm))
1166                 RETURN(-EINVAL);
1167
1168         if (!exp || !exp->exp_obd)
1169                 RETURN(-ENODEV);
1170
1171         lov = &exp->exp_obd->u.lov;
1172         rc = lov_prep_punch_set(exp, oa, lsm, start, end, oti, &set);
1173         if (rc)
1174                 RETURN(rc);
1175
1176         list_for_each (pos, &set->set_list) {
1177                 req = list_entry(pos, struct lov_request, rq_link);
1178
1179                 rc = obd_punch(lov->tgts[req->rq_idx].ltd_exp, req->rq_oa,
1180                                NULL, req->rq_extent.start,
1181                                req->rq_extent.end, NULL, capa);
1182                 err = lov_update_punch_set(set, req, rc);
1183                 if (err) {
1184                         CERROR("error: punch objid "LPX64" subobj "LPX64
1185                                " on OST idx %d: rc = %d\n", set->set_oa->o_id,
1186                                req->rq_oa->o_id, req->rq_idx, rc);
1187                         if (!rc)
1188                                 rc = err;
1189                 }
1190         }
1191         err = lov_fini_punch_set(set);
1192         if (!rc)
1193                 rc = err;
1194         RETURN(rc);
1195 }
1196
1197 static int lov_sync(struct obd_export *exp, struct obdo *oa,
1198                     struct lov_stripe_md *lsm, obd_off start, obd_off end)
1199 {
1200         struct lov_request_set *set;
1201         struct lov_obd *lov;
1202         struct list_head *pos;
1203         struct lov_request *req;
1204         int err = 0, rc = 0;
1205         ENTRY;
1206
1207         if (lsm_bad_magic(lsm))
1208                 RETURN(-EINVAL);
1209
1210         if (!exp->exp_obd)
1211                 RETURN(-ENODEV);
1212
1213         lov = &exp->exp_obd->u.lov;
1214         rc = lov_prep_sync_set(exp, oa, lsm, start, end, &set);
1215         if (rc)
1216                 RETURN(rc);
1217
1218         list_for_each (pos, &set->set_list) {
1219                 req = list_entry(pos, struct lov_request, rq_link);
1220
1221                 rc = obd_sync(lov->tgts[req->rq_idx].ltd_exp, req->rq_oa,
1222                               NULL, req->rq_extent.start, req->rq_extent.end);
1223                 err = lov_update_common_set(set, req, rc);
1224                 if (err) {
1225                         CERROR("error: fsync objid "LPX64" subobj "LPX64
1226                                " on OST idx %d: rc = %d\n", set->set_oa->o_id,
1227                                req->rq_oa->o_id, req->rq_idx, rc);
1228                         if (!rc)
1229                                 rc = err;
1230                 }
1231         }
1232         err = lov_fini_sync_set(set);
1233         if (!rc)
1234                 rc = err;
1235         RETURN(rc);
1236 }
1237
1238 static int lov_brw_check(struct lov_obd *lov, struct obdo *oa,
1239                          struct lov_stripe_md *lsm,
1240                          obd_count oa_bufs, struct brw_page *pga)
1241 {
1242         int i, rc = 0;
1243         ENTRY;
1244
1245         /* The caller just wants to know if there's a chance that this
1246          * I/O can succeed */
1247         for (i = 0; i < oa_bufs; i++) {
1248                 struct lov_oinfo *loi;
1249                 struct lov_tgt_desc *tgt;
1250                 int stripe;
1251                 obd_off start, end;
1252
1253                 if (!lov_stripe_intersects(lsm, i, pga[i].disk_offset,
1254                                            pga[i].disk_offset + pga[i].count,
1255                                            &start, &end))
1256                         continue;
1257
1258                 stripe = lov_stripe_number(lsm, pga[i].disk_offset);
1259                 loi = lsm->lsm_oinfo + stripe;
1260                 tgt = lov->tgts + loi->loi_ost_idx;
1261
1262                 if (!lov_tgt_ready(lov, tgt, loi->loi_ost_gen)) {
1263                         CDEBUG(D_HA, "lov idx %d inactive\n", loi->loi_ost_idx);
1264                         RETURN(-EIO);
1265                 }
1266                 rc = obd_brw(OBD_BRW_CHECK, tgt->ltd_exp, oa,
1267                              NULL, 1, &pga[i], NULL);
1268                 lov_tgt_decref(lov, tgt);
1269                 if (rc)
1270                         break;
1271         }
1272         RETURN(rc);
1273 }
1274
1275 static int lov_brw(int cmd, struct obd_export *exp, struct obdo *src_oa,
1276                    struct lov_stripe_md *lsm, obd_count oa_bufs,
1277                    struct brw_page *pga, struct obd_trans_info *oti)
1278 {
1279         struct lov_request_set *set;
1280         struct lov_request *req;
1281         struct list_head *pos;
1282         struct lov_obd *lov = &exp->exp_obd->u.lov;
1283         int err, rc = 0;
1284         ENTRY;
1285
1286         if (lsm_bad_magic(lsm))
1287                 RETURN(-EINVAL);
1288
1289         if (cmd == OBD_BRW_CHECK) {
1290                 rc = lov_brw_check(lov, src_oa, lsm, oa_bufs, pga);
1291                 RETURN(rc);
1292         }
1293
1294         rc = lov_prep_brw_set(exp, src_oa, lsm, oa_bufs, pga, oti, &set);
1295         if (rc)
1296                 RETURN(rc);
1297
1298         list_for_each (pos, &set->set_list) {
1299                 struct obd_export *sub_exp;
1300                 struct brw_page *sub_pga;
1301                 req = list_entry(pos, struct lov_request, rq_link);
1302
1303                 sub_exp = lov->tgts[req->rq_idx].ltd_exp;
1304                 sub_pga = set->set_pga + req->rq_pgaidx;
1305                 rc = obd_brw(cmd, sub_exp, req->rq_oa, req->rq_md,
1306                              req->rq_oabufs, sub_pga, oti);
1307                 if (rc)
1308                         break;
1309                 lov_update_common_set(set, req, rc);
1310         }
1311
1312         err = lov_fini_brw_set(set);
1313         if (!rc)
1314                 rc = err;
1315         RETURN(rc);
1316 }
1317
1318 static int lov_brw_interpret(struct ptlrpc_request_set *reqset, void *data,
1319                              int rc)
1320 {
1321         struct lov_request_set *lovset = (struct lov_request_set *)data;
1322         ENTRY;
1323
1324         if (rc) {
1325                 lovset->set_completes = 0;
1326                 lov_fini_brw_set(lovset);
1327         } else {
1328                 rc = lov_fini_brw_set(lovset);
1329         }
1330
1331         RETURN(rc);
1332 }
1333
1334 static int lov_brw_async(int cmd, struct obd_export *exp, struct obdo *oa,
1335                          struct lov_stripe_md *lsm, obd_count oa_bufs,
1336                          struct brw_page *pga, struct ptlrpc_request_set *set,
1337                          struct obd_trans_info *oti)
1338 {
1339         struct lov_request_set *lovset;
1340         struct lov_request *req;
1341         struct list_head *pos;
1342         struct lov_obd *lov = &exp->exp_obd->u.lov;
1343         int rc = 0;
1344         ENTRY;
1345
1346         if (lsm_bad_magic(lsm))
1347                 RETURN(-EINVAL);
1348
1349         if (cmd == OBD_BRW_CHECK) {
1350                 rc = lov_brw_check(lov, oa, lsm, oa_bufs, pga);
1351                 RETURN(rc);
1352         }
1353
1354         rc = lov_prep_brw_set(exp, oa, lsm, oa_bufs, pga, oti, &lovset);
1355         if (rc)
1356                 RETURN(rc);
1357
1358         list_for_each (pos, &lovset->set_list) {
1359                 struct obd_export *sub_exp;
1360                 struct brw_page *sub_pga;
1361                 req = list_entry(pos, struct lov_request, rq_link);
1362
1363                 sub_exp = lov->tgts[req->rq_idx].ltd_exp;
1364                 sub_pga = lovset->set_pga + req->rq_pgaidx;
1365                 rc = obd_brw_async(cmd, sub_exp, req->rq_oa, req->rq_md,
1366                                    req->rq_oabufs, sub_pga, set, oti);
1367                 if (rc)
1368                         GOTO(out, rc);
1369                 lov_update_common_set(lovset, req, rc);
1370         }
1371         LASSERT(rc == 0);
1372         LASSERT(set->set_interpret == NULL);
1373         set->set_interpret = (set_interpreter_func)lov_brw_interpret;
1374         set->set_arg = (void *)lovset;
1375
1376         RETURN(rc);
1377 out:
1378         lov_fini_brw_set(lovset);
1379         RETURN(rc);
1380 }
1381
1382 static int lov_ap_make_ready(void *data, int cmd)
1383 {
1384         struct lov_async_page *lap = LAP_FROM_COOKIE(data);
1385
1386         return lap->lap_caller_ops->ap_make_ready(lap->lap_caller_data, cmd);
1387 }
1388 static int lov_ap_refresh_count(void *data, int cmd)
1389 {
1390         struct lov_async_page *lap = LAP_FROM_COOKIE(data);
1391
1392         return lap->lap_caller_ops->ap_refresh_count(lap->lap_caller_data,
1393                                                      cmd);
1394 }
1395 static void lov_ap_fill_obdo(void *data, int cmd, struct obdo *oa)
1396 {
1397         struct lov_async_page *lap = LAP_FROM_COOKIE(data);
1398
1399         lap->lap_caller_ops->ap_fill_obdo(lap->lap_caller_data, cmd, oa);
1400         /* XXX woah, shouldn't we be altering more here?  size? */
1401         oa->o_id = lap->lap_loi_id;
1402 }
1403
1404 static void lov_ap_completion(void *data, int cmd, struct obdo *oa, int rc)
1405 {
1406         struct lov_async_page *lap = LAP_FROM_COOKIE(data);
1407
1408         /* in a raid1 regime this would down a count of many ios
1409          * in flight, onl calling the caller_ops completion when all
1410          * the raid1 ios are complete */
1411         lap->lap_caller_ops->ap_completion(lap->lap_caller_data, cmd, oa, rc);
1412 }
1413
1414 static struct obd_async_page_ops lov_async_page_ops = {
1415         .ap_make_ready =        lov_ap_make_ready,
1416         .ap_refresh_count =     lov_ap_refresh_count,
1417         .ap_fill_obdo =         lov_ap_fill_obdo,
1418         .ap_completion =        lov_ap_completion,
1419 };
1420
1421 static int lov_prep_async_page(struct obd_export *exp,
1422                                struct lov_stripe_md *lsm,
1423                                struct lov_oinfo *loi, struct page *page,
1424                                obd_off offset, struct obd_async_page_ops *ops,
1425                                void *data, void **res)
1426 {
1427         struct lov_obd *lov = &exp->exp_obd->u.lov;
1428         struct lov_tgt_desc *tgt;
1429         struct lov_async_page *lap;
1430         int rc, stripe;
1431         ENTRY;
1432
1433         if (lsm_bad_magic(lsm))
1434                 RETURN(-EINVAL);
1435         LASSERT(loi == NULL);
1436
1437         stripe = lov_stripe_number(lsm, offset);
1438         loi = &lsm->lsm_oinfo[stripe];
1439
1440         OBD_ALLOC(lap, sizeof(*lap));
1441         if (lap == NULL)
1442                 RETURN(-ENOMEM);
1443
1444         lap->lap_magic = LAP_MAGIC;
1445         lap->lap_caller_ops = ops;
1446         lap->lap_caller_data = data;
1447
1448         /* FIXME handle multiple oscs after landing b_raid1 */
1449         lap->lap_stripe = stripe;
1450         switch (lsm->lsm_pattern) {
1451                 case LOV_PATTERN_RAID0:
1452                         lov_stripe_offset(lsm, offset, lap->lap_stripe,
1453                                           &lap->lap_sub_offset);
1454                         break;
1455                 case LOV_PATTERN_CMOBD:
1456                         lap->lap_sub_offset = offset;
1457                         break;
1458                 default:
1459                         LBUG();
1460         }
1461
1462         /* so the callback doesn't need the lsm */
1463         lap->lap_loi_id = loi->loi_id;
1464
1465         tgt = lov->tgts + loi->loi_ost_idx;
1466
1467         if (lov_tgt_ready(lov, tgt, loi->loi_ost_gen)) {
1468                 rc = obd_prep_async_page(tgt->ltd_exp, lsm, loi, page,
1469                                          lap->lap_sub_offset,
1470                                          &lov_async_page_ops, lap,
1471                                          &lap->lap_sub_cookie);
1472         } else {
1473                 rc = -EIO;
1474         }
1475
1476         if (rc) {
1477                 OBD_FREE(lap, sizeof(*lap));
1478                 RETURN(rc);
1479         }
1480         CDEBUG(D_CACHE, "lap %p page %p cookie %p off "LPU64"\n", lap, page,
1481                lap->lap_sub_cookie, offset);
1482         *res = lap;
1483         RETURN(0);
1484 }
1485
1486 static int lov_queue_async_io(struct obd_export *exp,
1487                               struct lov_stripe_md *lsm,
1488                               struct lov_oinfo *loi, void *cookie,
1489                               int cmd, obd_off off, int count,
1490                               obd_flags brw_flags, obd_flags async_flags)
1491 {
1492         struct lov_obd *lov = &exp->exp_obd->u.lov;
1493         struct lov_tgt_desc *tgt;
1494         struct lov_async_page *lap;
1495         int rc;
1496
1497         LASSERT(loi == NULL);
1498
1499         if (lsm_bad_magic(lsm))
1500                 RETURN(-EINVAL);
1501
1502         lap = LAP_FROM_COOKIE(cookie);
1503         loi = &lsm->lsm_oinfo[lap->lap_stripe];
1504         tgt = lov->tgts + loi->loi_ost_idx;
1505
1506         if (!lov_tgt_ready(lov, tgt, loi->loi_ost_gen))
1507                  RETURN(-EIO);
1508
1509         rc = obd_queue_async_io(tgt->ltd_exp, lsm, loi, lap->lap_sub_cookie,
1510                                 cmd, off, count, brw_flags, async_flags);
1511
1512         lov_tgt_decref(lov, tgt);
1513         RETURN(rc);
1514 }
1515
1516 static int lov_set_async_flags(struct obd_export *exp,
1517                                struct lov_stripe_md *lsm,
1518                                struct lov_oinfo *loi, void *cookie,
1519                                obd_flags async_flags)
1520 {
1521         struct lov_obd *lov = &exp->exp_obd->u.lov;
1522         struct lov_tgt_desc *tgt;
1523         struct lov_async_page *lap;
1524         int rc;
1525
1526         LASSERT(loi == NULL);
1527
1528         if (lsm_bad_magic(lsm))
1529                 RETURN(-EINVAL);
1530
1531         lap = LAP_FROM_COOKIE(cookie);
1532         loi = &lsm->lsm_oinfo[lap->lap_stripe];
1533         tgt = lov->tgts + loi->loi_ost_idx;
1534
1535         if (!lov_tgt_ready(lov, tgt, loi->loi_ost_gen))
1536                  RETURN(-EIO);
1537
1538         rc = obd_set_async_flags(tgt->ltd_exp, lsm, loi, lap->lap_sub_cookie,
1539                                  async_flags);
1540
1541         lov_tgt_decref(lov, tgt);
1542         RETURN(rc);
1543 }
1544
1545 static int lov_queue_group_io(struct obd_export *exp,
1546                               struct lov_stripe_md *lsm,
1547                               struct lov_oinfo *loi,
1548                               struct obd_io_group *oig, void *cookie,
1549                               int cmd, obd_off off, int count,
1550                               obd_flags brw_flags, obd_flags async_flags)
1551 {
1552         struct lov_obd *lov = &exp->exp_obd->u.lov;
1553         struct lov_tgt_desc *tgt;
1554         struct lov_async_page *lap;
1555         int rc;
1556
1557         LASSERT(loi == NULL);
1558
1559         if (lsm_bad_magic(lsm))
1560                 RETURN(-EINVAL);
1561
1562         lap = LAP_FROM_COOKIE(cookie);
1563         loi = &lsm->lsm_oinfo[lap->lap_stripe];
1564         tgt = lov->tgts + loi->loi_ost_idx;
1565
1566         if (!lov_tgt_ready(lov, tgt, loi->loi_ost_gen))
1567                  RETURN(-EIO);
1568
1569         rc = obd_queue_group_io(tgt->ltd_exp, lsm, loi, oig,
1570                                 lap->lap_sub_cookie, cmd, off, count,
1571                                 brw_flags, async_flags);
1572
1573         lov_tgt_decref(lov, tgt);
1574         RETURN(rc);
1575 }
1576
1577 /* this isn't exactly optimal.  we may have queued sync io in oscs on
1578  * all stripes, but we don't record that fact at queue time.  so we
1579  * trigger sync io on all stripes. */
1580 static int lov_trigger_group_io(struct obd_export *exp,
1581                                 struct lov_stripe_md *lsm,
1582                                 struct lov_oinfo *loi,
1583                                 struct obd_io_group *oig)
1584 {
1585         struct lov_obd *lov = &exp->exp_obd->u.lov;
1586         int rc = 0, i, err;
1587
1588         LASSERT(loi == NULL);
1589
1590         if (lsm_bad_magic(lsm))
1591                 RETURN(-EINVAL);
1592
1593         loi = lsm->lsm_oinfo;
1594         for (i = 0; i < lsm->lsm_stripe_count; i++, loi++) {
1595                 struct lov_tgt_desc *tgt = lov->tgts + loi->loi_ost_idx;
1596
1597                 if (!lov_tgt_ready(lov, tgt, loi->loi_ost_gen)) {
1598                         CDEBUG(D_HA, "lov idx %d inactive\n", loi->loi_ost_idx);
1599                         continue;
1600                 }
1601
1602                 err = obd_trigger_group_io(tgt->ltd_exp, lsm, loi, oig);
1603
1604                 lov_tgt_decref(lov, tgt);
1605
1606                 if (rc == 0 && err != 0)
1607                         rc = err;
1608         };
1609         RETURN(rc);
1610 }
1611
1612 static int lov_teardown_async_page(struct obd_export *exp,
1613                                    struct lov_stripe_md *lsm,
1614                                    struct lov_oinfo *loi, void *cookie)
1615 {
1616         struct lov_obd *lov = &exp->exp_obd->u.lov;
1617         struct lov_tgt_desc *tgt;
1618         struct lov_async_page *lap;
1619         int rc;
1620         ENTRY;
1621
1622         LASSERT(loi == NULL);
1623
1624         if (lsm_bad_magic(lsm))
1625                 RETURN(-EINVAL);
1626
1627         lap = LAP_FROM_COOKIE(cookie);
1628
1629         loi = &lsm->lsm_oinfo[lap->lap_stripe];
1630         tgt = lov->tgts + loi->loi_ost_idx;
1631
1632         rc = obd_teardown_async_page(tgt->ltd_exp, lsm, loi,
1633                                      lap->lap_sub_cookie);
1634         lov_tgt_decref(lov, tgt);
1635
1636         if (rc) {
1637                 CERROR("unable to teardown sub cookie %p: %d\n",
1638                        lap->lap_sub_cookie, rc);
1639                 RETURN(rc);
1640         }
1641         OBD_FREE(lap, sizeof(*lap));
1642         RETURN(rc);
1643 }
1644
1645 static int lov_enqueue(struct obd_export *exp, struct lov_stripe_md *lsm,
1646                        __u32 type, ldlm_policy_data_t *policy, __u32 mode,
1647                        int *flags, void *bl_cb, void *cp_cb, void *gl_cb,
1648                        void *data,__u32 lvb_len, void *lvb_swabber,
1649                        struct lustre_handle *lockh)
1650 {
1651         struct lov_request_set *set;
1652         struct lov_request *req;
1653         struct list_head *pos;
1654         struct lustre_handle *lov_lockhp;
1655         struct lov_obd *lov;
1656         ldlm_error_t rc;
1657         int save_flags = *flags;
1658         ENTRY;
1659
1660         if (lsm_bad_magic(lsm))
1661                 RETURN(-EINVAL);
1662
1663         /* we should never be asked to replay a lock this way. */
1664         LASSERT((*flags & LDLM_FL_REPLAY) == 0);
1665
1666         if (!exp || !exp->exp_obd)
1667                 RETURN(-ENODEV);
1668
1669         lov = &exp->exp_obd->u.lov;
1670         rc = lov_prep_enqueue_set(exp, lsm, policy, mode, lockh, &set);
1671         if (rc)
1672                 RETURN(rc);
1673
1674         list_for_each (pos, &set->set_list) {
1675                 ldlm_policy_data_t sub_policy;
1676                 req = list_entry(pos, struct lov_request, rq_link);
1677                 lov_lockhp = set->set_lockh->llh_handles + req->rq_stripe;
1678                 LASSERT(lov_lockhp);
1679
1680                 *flags = save_flags;
1681                 sub_policy.l_extent.start = req->rq_extent.start;
1682                 sub_policy.l_extent.end = req->rq_extent.end;
1683
1684                 rc = obd_enqueue(lov->tgts[req->rq_idx].ltd_exp, req->rq_md,
1685                                  type, &sub_policy, mode, flags, bl_cb,
1686                                  cp_cb, gl_cb, data, lvb_len, lvb_swabber,
1687                                  lov_lockhp);
1688                 rc = lov_update_enqueue_set(set, req, rc, save_flags);
1689                 if (rc != ELDLM_OK)
1690                         break;
1691         }
1692
1693         lov_fini_enqueue_set(set, mode);
1694         RETURN(rc);
1695 }
1696
1697 static int lov_match(struct obd_export *exp, struct lov_stripe_md *lsm,
1698                      __u32 type, ldlm_policy_data_t *policy, __u32 mode,
1699                      int *flags, void *data, struct lustre_handle *lockh)
1700 {
1701         struct lov_request_set *set;
1702         struct lov_request *req;
1703         struct list_head *pos;
1704         struct lov_obd *lov = &exp->exp_obd->u.lov;
1705         struct lustre_handle *lov_lockhp;
1706         int lov_flags, rc = 0;
1707         ENTRY;
1708
1709         if (lsm_bad_magic(lsm))
1710                 RETURN(-EINVAL);
1711
1712         if (!exp || !exp->exp_obd)
1713                 RETURN(-ENODEV);
1714
1715         lov = &exp->exp_obd->u.lov;
1716         rc = lov_prep_match_set(exp, lsm, policy, mode, lockh, &set);
1717         if (rc)
1718                 RETURN(rc);
1719
1720         list_for_each (pos, &set->set_list) {
1721                 ldlm_policy_data_t sub_policy;
1722                 req = list_entry(pos, struct lov_request, rq_link);
1723                 lov_lockhp = set->set_lockh->llh_handles + req->rq_stripe;
1724                 LASSERT(lov_lockhp);
1725
1726                 sub_policy.l_extent.start = req->rq_extent.start;
1727                 sub_policy.l_extent.end = req->rq_extent.end;
1728                 lov_flags = *flags;
1729
1730                 rc = obd_match(lov->tgts[req->rq_idx].ltd_exp, req->rq_md,
1731                                type, &sub_policy, mode, &lov_flags, data,
1732                                lov_lockhp);
1733                 rc = lov_update_match_set(set, req, rc);
1734                 if (rc != 1)
1735                         break;
1736         }
1737         lov_fini_match_set(set, mode, *flags);
1738         RETURN(rc);
1739 }
1740
1741 static int lov_change_cbdata(struct obd_export *exp,
1742                              struct lov_stripe_md *lsm, ldlm_iterator_t it,
1743                              void *data)
1744 {
1745         struct lov_obd *lov;
1746         struct lov_oinfo *loi;
1747         int rc = 0, i;
1748         ENTRY;
1749
1750         if (lsm_bad_magic(lsm))
1751                 RETURN(-EINVAL);
1752
1753         if (!exp || !exp->exp_obd)
1754                 RETURN(-ENODEV);
1755
1756         LASSERT(lsm->lsm_object_gr > 0);
1757
1758         lov = &exp->exp_obd->u.lov;
1759         for (i = 0,loi = lsm->lsm_oinfo; i < lsm->lsm_stripe_count; i++,loi++) {
1760                 struct lov_tgt_desc *tgt = lov->tgts + loi->loi_ost_idx;
1761                 struct lov_stripe_md submd;
1762
1763                 submd.lsm_object_id = loi->loi_id;
1764                 submd.lsm_object_gr = lsm->lsm_object_gr;
1765                 submd.lsm_stripe_count = 0;
1766                 rc = obd_change_cbdata(tgt->ltd_exp, &submd, it, data);
1767                 lov_tgt_decref(lov, tgt);
1768         }
1769         RETURN(rc);
1770 }
1771
1772 static int lov_cancel(struct obd_export *exp, struct lov_stripe_md *lsm,
1773                       __u32 mode, struct lustre_handle *lockh)
1774 {
1775         struct lov_request_set *set;
1776         struct lov_request *req;
1777         struct list_head *pos;
1778         struct lov_obd *lov = &exp->exp_obd->u.lov;
1779         struct lustre_handle *lov_lockhp;
1780         int err = 0, rc = 0;
1781         ENTRY;
1782
1783         if (lsm_bad_magic(lsm))
1784                 RETURN(-EINVAL);
1785
1786         if (!exp || !exp->exp_obd)
1787                 RETURN(-ENODEV);
1788
1789         LASSERT(lsm->lsm_object_gr > 0);
1790
1791         LASSERT(lockh);
1792         lov = &exp->exp_obd->u.lov;
1793         rc = lov_prep_cancel_set(exp, lsm, mode, lockh, &set);
1794         if (rc)
1795                 RETURN(rc);
1796
1797         list_for_each (pos, &set->set_list) {
1798                 req = list_entry(pos, struct lov_request, rq_link);
1799                 lov_lockhp = set->set_lockh->llh_handles + req->rq_stripe;
1800
1801                 rc = obd_cancel(lov->tgts[req->rq_idx].ltd_exp, req->rq_md,
1802                                 mode, lov_lockhp);
1803                 rc = lov_update_common_set(set, req, rc);
1804                 if (rc) {
1805                         CERROR("error: cancel objid "LPX64" subobj "
1806                                LPX64" on OST idx %d: rc = %d\n",
1807                                lsm->lsm_object_id,
1808                                req->rq_md->lsm_object_id, req->rq_idx, rc);
1809                         err = rc;
1810                 }
1811
1812         }
1813         lov_fini_cancel_set(set);
1814         RETURN(err);
1815 }
1816
1817 static int lov_cancel_unused(struct obd_export *exp,
1818                              struct lov_stripe_md *lsm,
1819                              int flags, void *opaque)
1820 {
1821         struct lov_obd *lov;
1822         struct lov_oinfo *loi;
1823         struct lov_tgt_desc *tgt;
1824         int rc = 0, i;
1825         ENTRY;
1826
1827         lov = &exp->exp_obd->u.lov;
1828         if (lsm == NULL) {
1829                 tgt = lov->tgts;
1830                 for (i = 0; i < lov->desc.ld_tgt_count; i++, tgt++) {
1831                         int err;
1832
1833                         if (lov_tgt_ready(lov, tgt, 0)) {
1834                                 err = obd_cancel_unused(tgt->ltd_exp, NULL,
1835                                                         flags, opaque);
1836                                 lov_tgt_decref(lov, tgt);
1837                         } else {
1838                                 if (obd_uuid_empty(&tgt->uuid))
1839                                         continue;
1840                                 CERROR("error: cancel unused "
1841                                        "OST idx %d: OST inactive.\n", i);
1842                                 err = -EIO;
1843                         }
1844                         if (!rc)
1845                                 rc = err;
1846                 }
1847                 RETURN(rc);
1848         }
1849
1850         if (lsm_bad_magic(lsm))
1851                 RETURN(-EINVAL);
1852
1853         if (!exp || !exp->exp_obd)
1854                 RETURN(-ENODEV);
1855
1856         LASSERT(lsm->lsm_object_gr > 0);
1857
1858         for (i = 0,loi = lsm->lsm_oinfo; i < lsm->lsm_stripe_count; i++,loi++) {
1859                 struct lov_stripe_md submd;
1860                 int err;
1861
1862                 submd.lsm_object_id = loi->loi_id;
1863                 submd.lsm_object_gr = lsm->lsm_object_gr;
1864                 submd.lsm_stripe_count = 0;
1865
1866                 tgt = lov->tgts + loi->loi_ost_idx;
1867                 if (lov_tgt_ready(lov, tgt, loi->loi_ost_gen)) {
1868                         err = obd_cancel_unused(tgt->ltd_exp, &submd, flags,
1869                                                 opaque);
1870                         lov_tgt_decref(lov, tgt);
1871                         if (err && lov_tgt_ready(lov, tgt, loi->loi_ost_gen)) {
1872                                 lov_tgt_decref(lov, tgt);
1873                                 CERROR("error: cancel unused objid "LPX64" "
1874                                        "subobj "LPX64" OST idx %d: rc = %d\n",
1875                                        lsm->lsm_object_id, loi->loi_id,
1876                                        loi->loi_ost_idx, err);
1877                         }
1878                 } else {
1879                         err = -EIO;
1880                         CERROR("error: cancel unused objid "LPX64" "
1881                                "subobj "LPX64" on OST idx %d: OST inactive.\n",
1882                                lsm->lsm_object_id,
1883                                loi->loi_id, loi->loi_ost_idx);
1884                 }
1885
1886                 if (!rc)
1887                         rc = err;
1888         }
1889         RETURN(rc);
1890 }
1891
1892 #define LOV_U64_MAX ((__u64)~0ULL)
1893 #define LOV_SUM_MAX(tot, add)                                           \
1894         do {                                                            \
1895                 if ((tot) + (add) < (tot))                              \
1896                         (tot) = LOV_U64_MAX;                            \
1897                 else                                                    \
1898                         (tot) += (add);                                 \
1899         } while(0)
1900
1901 static int lov_statfs(struct obd_device *obd, struct obd_statfs *osfs,
1902                       unsigned long max_age)
1903 {
1904         struct lov_obd *lov = &obd->u.lov;
1905         struct lov_tgt_desc *tgt = lov->tgts;
1906         struct obd_statfs lov_sfs;
1907         int set = 0;
1908         int rc = 0;
1909         int i;
1910         ENTRY;
1911
1912
1913         /* We only get block data from the OBD */
1914         for (i = 0; i < lov->desc.ld_tgt_count; i++, tgt++) {
1915                 int err;
1916
1917                 if (!lov_tgt_active(lov, tgt, 0)) {
1918                         CDEBUG(D_HA, "lov idx %d inactive\n", i);
1919                         continue;
1920                 }
1921
1922                 err = obd_statfs(class_exp2obd(tgt->ltd_exp), &lov_sfs,max_age);
1923                 lov_tgt_decref(lov, tgt);
1924                 if (err) {
1925                         if (lov_tgt_active(lov, tgt, 0)) {
1926                                 lov_tgt_decref(lov, tgt);
1927                                 if (!rc)
1928                                         rc = err;
1929                         }
1930                         continue;
1931                 }
1932
1933                 if (!set) {
1934                         memcpy(osfs, &lov_sfs, sizeof(lov_sfs));
1935                         set = 1;
1936                 } else {
1937                         osfs->os_bfree += lov_sfs.os_bfree;
1938                         osfs->os_bavail += lov_sfs.os_bavail;
1939                         osfs->os_blocks += lov_sfs.os_blocks;
1940                         /* XXX not sure about this one - depends on policy.
1941                          *   - could be minimum if we always stripe on all OBDs
1942                          *     (but that would be wrong for any other policy,
1943                          *     if one of the OBDs has no more objects left)
1944                          *   - could be sum if we stripe whole objects
1945                          *   - could be average, just to give a nice number
1946                          *
1947                          * To give a "reasonable" (if not wholly accurate)
1948                          * number, we divide the total number of free objects
1949                          * by expected stripe count (watch out for overflow).
1950                          */
1951                         LOV_SUM_MAX(osfs->os_files, lov_sfs.os_files);
1952                         LOV_SUM_MAX(osfs->os_ffree, lov_sfs.os_ffree);
1953                 }
1954         }
1955
1956         if (set) {
1957                 __u32 expected_stripes = lov->desc.ld_default_stripe_count ?
1958                                          lov->desc.ld_default_stripe_count :
1959                                          lov->desc.ld_active_tgt_count;
1960
1961                 if ((lov->desc.ld_default_stripe_count == 0) ||
1962                     (lov->desc.ld_default_stripe_count >
1963                      lov->desc.ld_active_tgt_count)) {
1964                         expected_stripes = lov->desc.ld_active_tgt_count;
1965                 } else {
1966                         expected_stripes = lov->desc.ld_default_stripe_count;
1967                 }
1968
1969                 if (osfs->os_files != LOV_U64_MAX)
1970                         do_div(osfs->os_files, expected_stripes);
1971                 if (osfs->os_ffree != LOV_U64_MAX)
1972                         do_div(osfs->os_ffree, expected_stripes);
1973         } else if (!rc)
1974                 rc = -EIO;
1975
1976         RETURN(rc);
1977 }
1978
1979 static int lov_iocontrol(unsigned int cmd, struct obd_export *exp, int len,
1980                          void *karg, void *uarg)
1981 {
1982         struct obd_device *obddev = class_exp2obd(exp);
1983         struct lov_obd *lov = &obddev->u.lov;
1984         struct lov_tgt_desc *tgt;
1985         int i, rc, count = lov->desc.ld_tgt_count;
1986         struct obd_uuid *uuidp;
1987         ENTRY;
1988
1989         switch (cmd) {
1990         case OBD_IOC_LOV_GET_CONFIG: {
1991                 struct obd_ioctl_data *data = karg;
1992                 struct lov_desc *desc;
1993                 char *buf = NULL;
1994                 __u32 *genp;
1995
1996                 buf = NULL;
1997                 len = 0;
1998                 if (obd_ioctl_getdata(&buf, &len, (void *)uarg))
1999                         RETURN(-EINVAL);
2000
2001                 data = (struct obd_ioctl_data *)buf;
2002
2003                 if (sizeof(*desc) > data->ioc_inllen1) {
2004                         obd_ioctl_freedata(buf, len);
2005                         RETURN(-EINVAL);
2006                 }
2007
2008                 if (sizeof(uuidp->uuid) * count > data->ioc_inllen2) {
2009                         obd_ioctl_freedata(buf, len);
2010                         RETURN(-EINVAL);
2011                 }
2012
2013                 if (sizeof(__u32) * count > data->ioc_inllen3) {
2014                         obd_ioctl_freedata(buf, len);
2015                         RETURN(-EINVAL);
2016                 }
2017
2018                 desc = (struct lov_desc *)data->ioc_inlbuf1;
2019                 memcpy(desc, &(lov->desc), sizeof(*desc));
2020
2021                 uuidp = (struct obd_uuid *)data->ioc_inlbuf2;
2022                 genp = (__u32 *)data->ioc_inlbuf3;
2023                 /* the uuid will be empty for deleted OSTs */
2024                 lov_tgts_lock(lov);
2025                 tgt = lov->tgts;
2026                 for (i = 0; i < count; i++, uuidp++, genp++, tgt++) {
2027                         obd_str2uuid(uuidp, (char *)tgt->uuid.uuid);
2028                         *genp = tgt->ltd_gen;
2029                 }
2030                 lov_tgts_unlock(lov);
2031
2032                 rc = copy_to_user((void *)uarg, buf, len);
2033                 if (rc)
2034                         rc = -EFAULT;
2035                 obd_ioctl_freedata(buf, len);
2036                 break;
2037         }
2038         case LL_IOC_LOV_SETSTRIPE:
2039                 rc = lov_setstripe(exp, karg, uarg);
2040                 break;
2041         case LL_IOC_LOV_GETSTRIPE:
2042                 rc = lov_getstripe(exp, karg, uarg);
2043                 break;
2044         case LL_IOC_LOV_SETEA:
2045                 rc = lov_setea(exp, karg, uarg);
2046                 break;
2047         default: {
2048                 int set = 0;
2049                 if (count == 0)
2050                         RETURN(-ENOTTY);
2051                 rc = 0;
2052                 for (i = 0, tgt = lov->tgts; i < count; i++, tgt++) {
2053                         int err;
2054
2055                         if (!lov_tgt_active(lov, tgt, 0)) {
2056                                 CERROR("error: iocontrol failed for OSC %s on "
2057                                        "OST idx %d: OST inactive.\n",
2058                                        tgt->uuid.uuid, i);
2059                                 if (!rc)
2060                                         rc = -EIO;
2061                                 continue;
2062                         }
2063
2064                         err = obd_iocontrol(cmd, tgt->ltd_exp, len, karg, uarg);
2065                         lov_tgt_decref(lov, tgt);
2066                         if (err) {
2067                                 if (lov_tgt_ready(lov, tgt, 0)) {
2068                                         lov_tgt_decref(lov, tgt);
2069                                         CERROR("error: iocontrol OSC %s on OST "
2070                                                "idx %d cmd %x: err = %d\n",
2071                                                lov->tgts[i].uuid.uuid, i,
2072                                                cmd, err);
2073                                         if (!rc)
2074                                                 rc = err;
2075                                 }
2076                         } else
2077                                 set = 1;
2078                 }
2079                 if (!set && !rc)
2080                         rc = -EIO;
2081         }
2082         }
2083
2084         RETURN(rc);
2085 }
2086
2087 static int lov_get_info(struct obd_export *exp, __u32 keylen,
2088                         void *key, __u32 *vallen, void *val)
2089 {
2090         struct obd_device *obddev = class_exp2obd(exp);
2091         struct lov_obd *lov = &obddev->u.lov;
2092         struct lov_tgt_desc *tgt;
2093         int i;
2094         ENTRY;
2095
2096         if (!vallen || !val)
2097                 RETURN(-EFAULT);
2098
2099         if (keylen > strlen("lock_to_stripe") &&
2100             strcmp(key, "lock_to_stripe") == 0) {
2101                 struct {
2102                         char name[16];
2103                         struct ldlm_lock *lock;
2104                         struct lov_stripe_md *lsm;
2105                 } *data = key;
2106                 struct lov_oinfo *loi;
2107                 struct ldlm_res_id *res_id = &data->lock->l_resource->lr_name;
2108                 __u32 *stripe = val;
2109
2110                 if (*vallen < sizeof(*stripe))
2111                         RETURN(-EFAULT);
2112                 *vallen = sizeof(*stripe);
2113
2114                 /* XXX This is another one of those bits that will need to
2115                  * change if we ever actually support nested LOVs.  It uses
2116                  * the lock's export to find out which stripe it is. */
2117                 /* XXX - it's assumed all the locks for deleted OSTs have
2118                  * been cancelled. Also, the export for deleted OSTs will
2119                  * be NULL and won't match the lock's export. */
2120                 lov_tgts_lock(lov);
2121                 for (i = 0, loi = data->lsm->lsm_oinfo;
2122                      i < data->lsm->lsm_stripe_count;
2123                      i++, loi++) {
2124                         if (lov->tgts[loi->loi_ost_idx].ltd_exp ==
2125                                         data->lock->l_conn_export &&
2126                             loi->loi_id == res_id->name[0] &&
2127                             loi->loi_gr == res_id->name[2]) {
2128                                 lov_tgts_unlock(lov);
2129                                 *stripe = i;
2130                                 RETURN(0);
2131                         }
2132                 }
2133                 lov_tgts_unlock(lov);
2134                 LDLM_ERROR(data->lock, "lock on inode without such object");
2135                 dump_lsm(D_ERROR, data->lsm);
2136                 portals_debug_dumpstack(NULL);
2137                 RETURN(-ENXIO);
2138         } else if (keylen >= strlen("size_to_stripe") &&
2139                    strcmp(key, "size_to_stripe") == 0) {
2140                 struct {
2141                         int stripe_number;
2142                         __u64 size;
2143                         struct lov_stripe_md *lsm;
2144                 } *data = val;
2145
2146                 if (*vallen < sizeof(*data))
2147                         RETURN(-EFAULT);
2148
2149                 data->size = lov_size_to_stripe(data->lsm, data->size,
2150                                                 data->stripe_number);
2151                 RETURN(0);
2152         } else if (keylen >= strlen("last_id") && strcmp(key, "last_id") == 0) {
2153                 __u32 size = sizeof(obd_id);
2154                 obd_id *ids = val;
2155                 int rc = 0;
2156
2157                 tgt = lov->tgts;
2158                 for (i = 0; i < lov->desc.ld_tgt_count; i++, tgt++) {
2159                         if (!lov_tgt_active(lov, tgt, 0))
2160                                 continue;
2161                         rc = obd_get_info(tgt->ltd_exp, keylen, key, &size,
2162                                           ids + i);
2163                         lov_tgt_decref(lov, tgt);
2164                         if (rc != 0)
2165                                 RETURN(rc);
2166                 }
2167                 RETURN(0);
2168         } else if (keylen >= strlen("lovdesc") && strcmp(key, "lovdesc") == 0) {
2169                 struct lov_desc *desc_ret = val;
2170                 *desc_ret = lov->desc;
2171
2172                 RETURN(0);
2173         }
2174
2175         RETURN(-EINVAL);
2176 }
2177
2178 static int lov_set_info(struct obd_export *exp, obd_count keylen,
2179                         void *key, obd_count vallen, void *val)
2180 {
2181         struct obd_device *obddev = class_exp2obd(exp);
2182         struct lov_obd *lov = &obddev->u.lov;
2183         struct lov_tgt_desc *tgt;
2184         int i, rc = 0, err;
2185         ENTRY;
2186
2187 #define KEY_IS(str) \
2188         (keylen == strlen(str) && memcmp(key, str, keylen) == 0)
2189
2190         if (KEY_IS("async")) {
2191                 struct lov_desc *desc = &lov->desc;
2192
2193                 if (vallen != sizeof(int))
2194                         RETURN(-EINVAL);
2195                 lov->async = *((int*) val);
2196
2197                 lov_tgts_lock(lov);
2198                 tgt = lov->tgts;
2199                 for (i = 0; i < desc->ld_tgt_count; i++, tgt++) {
2200                         struct obd_uuid *tgt_uuid = &tgt->uuid;
2201                         struct obd_device *tgt_obd;
2202
2203                         tgt_obd = class_find_client_obd(tgt_uuid,
2204                                                         OBD_OSC_DEVICENAME,
2205                                                         &obddev->obd_uuid);
2206                         if (!tgt_obd) {
2207                                 CERROR("Target %s not attached\n",
2208                                         tgt_uuid->uuid);
2209                                 if (!rc)
2210                                         rc = -EINVAL;
2211                                 continue;
2212                         }
2213
2214                         err = obd_set_info(tgt_obd->obd_self_export,
2215                                            keylen, key, vallen, val);
2216                         if (err) {
2217                                 CERROR("Failed to set async on target %s\n",
2218                                         tgt_obd->obd_name);
2219                                 if (!rc)
2220                                         rc = err;
2221                         }
2222                 }
2223                 lov_tgts_unlock(lov);
2224                 RETURN(rc);
2225         }
2226
2227         if (KEY_IS("mds_conn")) {
2228                 if (vallen != sizeof(__u32))
2229                         RETURN(-EINVAL);
2230         } else if (KEY_IS("unlinked") || KEY_IS("unrecovery")) {
2231                 if (vallen != 0)
2232                         RETURN(-EINVAL);
2233         } else if (KEY_IS("sec") || KEY_IS("sec_flags")) {
2234                 struct lov_tgt_desc *tgt;
2235                 struct obd_export *exp;
2236                 int rc = 0, err, i;
2237
2238                 lov_tgts_lock(lov);
2239                 tgt = lov->tgts;
2240                 for (i = 0; i < lov->desc.ld_tgt_count; i++, tgt++) {
2241                         exp = tgt->ltd_exp;
2242                         /* during setup time the connections to osc might
2243                          * haven't been established.
2244                          */
2245                         if (exp == NULL) {
2246                                 struct obd_device *tgt_obd;
2247
2248                                 tgt_obd = class_find_client_obd(&tgt->uuid,
2249                                                                 OBD_OSC_DEVICENAME,
2250                                                                 &obddev->obd_uuid);
2251                                 if (!tgt_obd) {
2252                                         CERROR("can't set security flavor, "
2253                                                "device %s not attached?\n",
2254                                                 tgt->uuid.uuid);
2255                                         rc = -EINVAL;
2256                                         continue;
2257                                 }
2258                                 exp = tgt_obd->obd_self_export;
2259                         }
2260
2261                         err = obd_set_info(exp, keylen, key, vallen, val);
2262                         if (!rc)
2263                                 rc = err;
2264                 }
2265                 lov_tgts_unlock(lov);
2266
2267                 RETURN(rc);
2268         } else if (KEY_IS("auditlog")) {
2269                 ptl_nid_t nid = 0;
2270                 struct audit_msg * msg = val;
2271                 int i = 0, len = sizeof(nid);
2272                 struct obd_export * ost_exp;
2273                 //try to find client nid
2274                 for (i = 0; i < lov->desc.ld_tgt_count; i++) {
2275                         if (!lov->tgts[i].ltd_exp)
2276                                 continue;
2277                         rc = obd_get_info(lov->tgts[i].ltd_exp, 10,
2278                                           "client_nid", &len, &nid);
2279                         if (!rc)
2280                                 break;
2281                 }
2282
2283                 i = (__u32)nid % lov->desc.ld_tgt_count;
2284
2285                 CDEBUG(D_INFO, "Select OST %i for nid %.8x\n",i, (__u32)nid);
2286
2287                 ost_exp = lov->tgts[i].ltd_exp;
2288                 if (!ost_exp) {
2289                         CERROR("can't send auditlog data,"
2290                                "device %s is not attached?\n",
2291                                lov->tgts[i].uuid.uuid);
2292                         RETURN(-EFAULT);
2293                 }
2294                 msg->nid = nid;
2295                 rc = obd_set_info(ost_exp, keylen, key, vallen, val);
2296
2297                 RETURN(rc);
2298         } else if (KEY_IS("audit_obj")) {
2299                 struct audit_lov_msg * msg = val;
2300                 int i = 0, index;
2301                 struct obd_export * ost_exp;
2302                 struct lov_oinfo *loi;
2303                 struct obdo *oa = NULL;
2304
2305                 oa = obdo_alloc();
2306                 if (oa == NULL)
2307                         RETURN(-ENOMEM);
2308
2309                 //set audit for all objects of file
2310                 CDEBUG(D_INFO, "Set audit 0x%x for objects\n", (__u32)msg->mask);
2311                 //use o_fid to store audit mask
2312                 oa->o_fid = msg->mask;
2313                 oa->o_uid = msg->uid;
2314                 oa->o_gid = msg->gid;
2315                 //iterate over all objects and set audit for each
2316                 for (i = 0, loi = msg->lsm->lsm_oinfo;
2317                      i < msg->lsm->lsm_stripe_count; i++, loi++) {
2318                         index = loi->loi_ost_idx;
2319                         ost_exp = lov->tgts[index].ltd_exp;
2320                         if (!ost_exp) {
2321                                 CERROR("can't send audit_obj data,"
2322                                        "device %s is not attached?\n",
2323                                        lov->tgts[i].uuid.uuid);
2324                                 continue;
2325                         }
2326                         oa->o_id = loi->loi_id;
2327                         oa->o_gr = loi->loi_gr;
2328
2329                         obd_set_info(ost_exp, keylen, key, sizeof(*oa), oa);
2330                 }
2331
2332                 obdo_free(oa);
2333                 RETURN(0);
2334         } else if (KEY_IS("audit")) {
2335                 int i = 0;
2336                 struct obd_export * ost_exp;
2337
2338                 //set audit for whole fs on OSS
2339                 for (i = 0; i < lov->desc.ld_tgt_count; i++) {
2340                         ost_exp = lov->tgts[i].ltd_exp;
2341                         if (!ost_exp) {
2342                                 CERROR("can't send audit_fs data,"
2343                                        "device %s is not attached?\n",
2344                                        lov->tgts[i].uuid.uuid);
2345                                 continue;
2346                         }
2347                         obd_set_info(ost_exp, keylen, key, vallen, val);
2348                 }
2349
2350                 RETURN(rc);
2351         } else if (KEY_IS("flush_cred") || KEY_IS("crypto_cb") ||
2352                    KEY_IS("capa_key")) {
2353                 struct lov_tgt_desc *tgt;
2354                 int rc = 0, i;
2355
2356                 tgt = lov->tgts;
2357                 for (i = 0; i < lov->desc.ld_tgt_count; i++, tgt++) {
2358                         if (!lov_tgt_active(lov, tgt, 0))
2359                                 continue;
2360                         rc = obd_set_info(tgt->ltd_exp,
2361                                           keylen, key, vallen, val);
2362                         lov_tgt_decref(lov, tgt);
2363                         if (rc)
2364                                 RETURN(rc);
2365                 }
2366
2367                 RETURN(0);
2368         } else if (KEY_IS("setext")) {
2369                 struct lov_tgt_desc *tgt;
2370                 int rc = 0, i;
2371
2372                 for (i = 0, tgt = lov->tgts; i < lov->desc.ld_tgt_count;
2373                      i++, tgt++) {
2374                         if (!tgt->ltd_exp)
2375                                 continue;
2376                         rc = obd_set_info(tgt->ltd_exp,
2377                                           keylen, key, vallen, val);
2378                         if (rc)
2379                                 RETURN(rc);
2380                 }
2381
2382                 RETURN(0);
2383         } else {
2384                 RETURN(-EINVAL);
2385         }
2386
2387         tgt = lov->tgts;
2388         for (i = 0; i < lov->desc.ld_tgt_count; i++, tgt++) {
2389                 int active = 0;
2390
2391                 if (val) {
2392                         if (!obd_uuid_equals(val, &tgt->uuid))
2393                                 continue;
2394                 } else if (!lov_tgt_active(lov, tgt, 0)) {
2395                         continue;
2396                 } else {
2397                         active = 1;
2398                 }
2399
2400                 err = obd_set_info(tgt->ltd_exp, keylen, key, vallen, val);
2401                 if (!rc)
2402                         rc = err;
2403                 if (active)
2404                         lov_tgt_decref(lov, tgt);
2405         }
2406         RETURN(rc);
2407 #undef KEY_IS
2408 }
2409
2410 #if 0
2411 struct lov_multi_wait {
2412         struct ldlm_lock *lock;
2413         wait_queue_t      wait;
2414         int               completed;
2415         int               generation;
2416 };
2417
2418 int lov_complete_many(struct obd_export *exp, struct lov_stripe_md *lsm,
2419                       struct lustre_handle *lockh)
2420 {
2421         struct lov_lock_handles *lov_lockh = NULL;
2422         struct lustre_handle *lov_lockhp;
2423         struct lov_obd *lov;
2424         struct lov_oinfo *loi;
2425         struct lov_multi_wait *queues;
2426         int rc = 0, i;
2427         ENTRY;
2428
2429         if (lsm_bad_magic(lsm))
2430                 RETURN(-EINVAL);
2431
2432         if (!exp || !exp->exp_obd)
2433                 RETURN(-ENODEV);
2434
2435         LASSERT(lockh != NULL);
2436         if (lsm->lsm_stripe_count > 1) {
2437                 lov_lockh = lov_handle2llh(lockh);
2438                 if (lov_lockh == NULL) {
2439                         CERROR("LOV: invalid lov lock handle %p\n", lockh);
2440                         RETURN(-EINVAL);
2441                 }
2442
2443                 lov_lockhp = lov_lockh->llh_handles;
2444         } else {
2445                 lov_lockhp = lockh;
2446         }
2447
2448         OBD_ALLOC(queues, lsm->lsm_stripe_count * sizeof(*queues));
2449         if (queues == NULL)
2450                 GOTO(out, rc = -ENOMEM);
2451
2452         lov = &exp->exp_obd->u.lov;
2453         for (i = 0, loi = lsm->lsm_oinfo; i < lsm->lsm_stripe_count;
2454              i++, loi++, lov_lockhp++) {
2455                 struct ldlm_lock *lock;
2456                 struct obd_device *obd;
2457                 unsigned long irqflags;
2458
2459                 lock = ldlm_handle2lock(lov_lockhp);
2460                 if (lock == NULL) {
2461                         CDEBUG(D_HA, "lov idx %d subobj "LPX64" no lock?\n",
2462                                loi->loi_ost_idx, loi->loi_id);
2463                         queues[i].completed = 1;
2464                         continue;
2465                 }
2466
2467                 queues[i].lock = lock;
2468                 init_waitqueue_entry(&(queues[i].wait), current);
2469                 add_wait_queue(lock->l_waitq, &(queues[i].wait));
2470
2471                 obd = class_exp2obd(lock->l_conn_export);
2472                 if (obd != NULL)
2473                         imp = obd->u.cli.cl_import;
2474                 if (imp != NULL) {
2475                         spin_lock_irqsave(&imp->imp_lock, irqflags);
2476                         queues[i].generation = imp->imp_generation;
2477                         spin_unlock_irqrestore(&imp->imp_lock, irqflags);
2478                 }
2479         }
2480
2481         lwi = LWI_TIMEOUT_INTR(obd_timeout * HZ, ldlm_expired_completion_wait,
2482                                interrupted_completion_wait, &lwd);
2483         rc = l_wait_event_added(check_multi_complete(queues, lsm), &lwi);
2484
2485         for (i = 0; i < lsm->lsm_stripe_count; i++)
2486                 remove_wait_queue(lock->l_waitq, &(queues[i].wait));
2487
2488         if (rc == -EINTR || rc == -ETIMEDOUT) {
2489
2490
2491         }
2492
2493  out:
2494         if (lov_lockh != NULL)
2495                 lov_llh_put(lov_lockh);
2496         RETURN(rc);
2497 }
2498 #endif
2499
2500 struct obd_ops lov_obd_ops = {
2501         .o_owner               = THIS_MODULE,
2502         .o_attach              = lov_attach,
2503         .o_detach              = lov_detach,
2504         .o_setup               = lov_setup,
2505         .o_cleanup             = lov_cleanup,
2506         .o_process_config      = lov_process_config,
2507         .o_connect             = lov_connect,
2508         .o_disconnect          = lov_disconnect,
2509         .o_statfs              = lov_statfs,
2510         .o_packmd              = lov_packmd,
2511         .o_unpackmd            = lov_unpackmd,
2512         .o_revalidate_md       = lov_revalidate_md,
2513         .o_create              = lov_create,
2514         .o_destroy             = lov_destroy,
2515         .o_getattr             = lov_getattr,
2516         .o_getattr_async       = lov_getattr_async,
2517         .o_setattr             = lov_setattr,
2518         .o_brw                 = lov_brw,
2519         .o_brw_async           = lov_brw_async,
2520         .o_prep_async_page     = lov_prep_async_page,
2521         .o_queue_async_io      = lov_queue_async_io,
2522         .o_set_async_flags     = lov_set_async_flags,
2523         .o_queue_group_io      = lov_queue_group_io,
2524         .o_trigger_group_io    = lov_trigger_group_io,
2525         .o_teardown_async_page = lov_teardown_async_page,
2526         .o_adjust_kms          = lov_adjust_kms,
2527         .o_punch               = lov_punch,
2528         .o_sync                = lov_sync,
2529         .o_enqueue             = lov_enqueue,
2530         .o_match               = lov_match,
2531         .o_change_cbdata       = lov_change_cbdata,
2532         .o_cancel              = lov_cancel,
2533         .o_cancel_unused       = lov_cancel_unused,
2534         .o_iocontrol           = lov_iocontrol,
2535         .o_get_info            = lov_get_info,
2536         .o_set_info            = lov_set_info,
2537         .o_llog_init           = lov_llog_init,
2538         .o_llog_finish         = lov_llog_finish,
2539         .o_notify              = lov_notify,
2540 };
2541
2542 int __init lov_init(void)
2543 {
2544         struct lprocfs_static_vars lvars;
2545         int rc;
2546         ENTRY;
2547
2548         lprocfs_init_vars(lov, &lvars);
2549         rc = class_register_type(&lov_obd_ops, NULL, lvars.module_vars,
2550                                  OBD_LOV_DEVICENAME);
2551         RETURN(rc);
2552 }
2553
2554 #ifdef __KERNEL__
2555 static void /*__exit*/ lov_exit(void)
2556 {
2557         class_unregister_type(OBD_LOV_DEVICENAME);
2558 }
2559
2560 MODULE_AUTHOR("Cluster File Systems, Inc. <info@clusterfs.com>");
2561 MODULE_DESCRIPTION("Lustre Logical Object Volume OBD driver");
2562 MODULE_LICENSE("GPL");
2563
2564 module_init(lov_init);
2565 module_exit(lov_exit);
2566 #endif