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) 2002-2006 Cluster File Systems, Inc.
   5  * Author: Phil Schwan <phil@clusterfs.com>
   6  *         Peter Braam <braam@clusterfs.com>
   7  *         Mike Shaver <shaver@clusterfs.com>
   8  *         Nathan Rutman <nathan@clusterfs.com>
   9  *
  10  *   This file is part of the Lustre file system, http://www.lustre.org
  11  *   Lustre is a trademark of Cluster File Systems, Inc.
  12  *
  13  *   You may have signed or agreed to another license before downloading
  14  *   this software.  If so, you are bound by the terms and conditions
  15  *   of that agreement, and the following does not apply to you.  See the
  16  *   LICENSE file included with this distribution for more information.
  17  *
  18  *   If you did not agree to a different license, then this copy of Lustre
  19  *   is open source software; you can redistribute it and/or modify it
  20  *   under the terms of version 2 of the GNU General Public License as
  21  *   published by the Free Software Foundation.
  22  *
  23  *   In either case, Lustre is distributed in the hope that it will be
  24  *   useful, but WITHOUT ANY WARRANTY; without even the implied warranty
  25  *   of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  26  *   license text for more details.
  27  */
  28
  29 #ifndef EXPORT_SYMTAB
  30 # define EXPORT_SYMTAB
  31 #endif
  32 #define DEBUG_SUBSYSTEM S_LOV
  33 #ifdef __KERNEL__
  34 #include <libcfs/libcfs.h>
  35 #else
  36 #include <liblustre.h>
  37 #endif
  38
  39 #include <obd_support.h>
  40 #include <lustre_lib.h>
  41 #include <lustre_net.h>
  42 #include <lustre/lustre_idl.h>
  43 #include <lustre_dlm.h>
  44 #include <lustre_mds.h>
  45 #include <lustre_debug.h>
  46 #include <obd_class.h>
  47 #include <obd_lov.h>
  48 #include <obd_ost.h>
  49 #include <lprocfs_status.h>
  50 #include <lustre_param.h>
  51
  52 #include "lov_internal.h"
  53
  54
  55 /* Keep a refcount of lov->tgt usage to prevent racing with addition/deletion.
  56    Any function that expects lov_tgts to remain stationary must take a ref. */
  57 void lov_getref(struct obd_device *obd)
  58 {
  59         struct lov_obd *lov = &obd->u.lov;
  60
  61         /* nobody gets through here until lov_putref is done */
  62         mutex_down(&lov->lov_lock);
  63         atomic_inc(&lov->lov_refcount);
  64         mutex_up(&lov->lov_lock);
  65         return;
  66 }
  67
  68 static void __lov_del_obd(struct obd_device *obd, __u32 index);
  69
  70 void lov_putref(struct obd_device *obd)
  71 {
  72         struct lov_obd *lov = &obd->u.lov;
  73         mutex_down(&lov->lov_lock);
  74         /* ok to dec to 0 more than once -- ltd_exp's will be null */
  75         if (atomic_dec_and_test(&lov->lov_refcount) && lov->lov_death_row) {
  76                 int i;
  77                 CDEBUG(D_CONFIG, "destroying %d lov targets\n",
  78                        lov->lov_death_row);
  79                 for (i = 0; i < lov->desc.ld_tgt_count; i++) {
  80                         if (!lov->lov_tgts[i] || !lov->lov_tgts[i]->ltd_reap)
  81                                 continue;
  82                         /* Disconnect and delete from list */
  83                         __lov_del_obd(obd, i);
  84                         lov->lov_death_row--;
  85                 }
  86         }
  87         mutex_up(&lov->lov_lock);
  88 }
  89
  90 #define MAX_STRING_SIZE 128
  91 static int lov_connect_obd(struct obd_device *obd, __u32 index, int activate,
  92                            struct obd_connect_data *data)
  93 {
  94         struct lov_obd *lov = &obd->u.lov;
  95         struct obd_uuid tgt_uuid = lov->lov_tgts[index]->ltd_uuid;
  96         struct obd_device *tgt_obd;
  97         struct obd_uuid lov_osc_uuid = { "LOV_OSC_UUID" };
  98         struct lustre_handle conn = {0, };
  99         struct obd_import *imp;
 100
 101 #ifdef __KERNEL__
 102         cfs_proc_dir_entry_t *lov_proc_dir;
 103 #endif
 104         int rc;
 105         ENTRY;
 106
 107         if (!lov->lov_tgts[index])
 108                 RETURN(-EINVAL);
 109
 110         tgt_obd = class_find_client_obd(&tgt_uuid, LUSTRE_OSC_NAME,
 111                                         &obd->obd_uuid);
 112
 113         if (!tgt_obd) {
 114                 CERROR("Target %s not attached\n", obd_uuid2str(&tgt_uuid));
 115                 RETURN(-EINVAL);
 116         }
 117         if (!tgt_obd->obd_set_up) {
 118                 CERROR("Target %s not set up\n", obd_uuid2str(&tgt_uuid));
 119                 RETURN(-EINVAL);
 120         }
 121
 122         if (data && (data->ocd_connect_flags & OBD_CONNECT_INDEX))
 123                 data->ocd_index = index;
 124
 125         /*
 126          * Divine LOV knows that OBDs under it are OSCs.
 127          */
 128         imp = tgt_obd->u.cli.cl_import;
 129
 130         if (activate) {
 131                 tgt_obd->obd_no_recov = 0;
 132                 /* FIXME this is probably supposed to be
 133                    ptlrpc_set_import_active.  Horrible naming. */
 134                 ptlrpc_activate_import(imp);
 135         }
 136
 137         if (imp->imp_invalid) {
 138                 CERROR("not connecting OSC %s; administratively "
 139                        "disabled\n", obd_uuid2str(&tgt_uuid));
 140                 rc = obd_register_observer(tgt_obd, obd);
 141                 if (rc) {
 142                         CERROR("Target %s register_observer error %d; "
 143                                "will not be able to reactivate\n",
 144                                obd_uuid2str(&tgt_uuid), rc);
 145                 }
 146                 RETURN(0);
 147         }
 148
 149         rc = obd_connect(NULL, &conn, tgt_obd, &lov_osc_uuid, data);
 150         if (rc) {
 151                 CERROR("Target %s connect error %d\n",
 152                        obd_uuid2str(&tgt_uuid), rc);
 153                 RETURN(rc);
 154         }
 155         lov->lov_tgts[index]->ltd_exp = class_conn2export(&conn);
 156         if (!lov->lov_tgts[index]->ltd_exp) {
 157                 CERROR("Target %s: null export!\n", obd_uuid2str(&tgt_uuid));
 158                 RETURN(-ENODEV);
 159         }
 160
 161         rc = obd_register_observer(tgt_obd, obd);
 162         if (rc) {
 163                 CERROR("Target %s register_observer error %d\n",
 164                        obd_uuid2str(&tgt_uuid), rc);
 165                 obd_disconnect(lov->lov_tgts[index]->ltd_exp);
 166                 lov->lov_tgts[index]->ltd_exp = NULL;
 167                 RETURN(rc);
 168         }
 169
 170         lov->lov_tgts[index]->ltd_reap = 0;
 171         if (activate) {
 172                 lov->lov_tgts[index]->ltd_active = 1;
 173                 lov->desc.ld_active_tgt_count++;
 174                 lov->lov_tgts[index]->ltd_exp->exp_obd->obd_inactive = 0;
 175         }
 176         CDEBUG(D_CONFIG, "Connected tgt idx %d %s (%s) %sactive\n", index,
 177                obd_uuid2str(&tgt_uuid), tgt_obd->obd_name, activate ? "":"in");
 178
 179 #ifdef __KERNEL__
 180         lov_proc_dir = lprocfs_srch(obd->obd_proc_entry, "target_obds");
 181         if (lov_proc_dir) {
 182                 struct obd_device *osc_obd = class_conn2obd(&conn);
 183                 cfs_proc_dir_entry_t *osc_symlink;
 184                 char name[MAX_STRING_SIZE];
 185
 186                 LASSERT(osc_obd != NULL);
 187                 LASSERT(osc_obd->obd_magic == OBD_DEVICE_MAGIC);
 188                 LASSERT(osc_obd->obd_type->typ_name != NULL);
 189                 snprintf(name, MAX_STRING_SIZE, "../../../%s/%s",
 190                          osc_obd->obd_type->typ_name,
 191                          osc_obd->obd_name);
 192                 osc_symlink = proc_symlink(osc_obd->obd_name, lov_proc_dir,
 193                                            name);
 194                 if (osc_symlink == NULL) {
 195                         CERROR("could not register LOV target "
 196                                "/proc/fs/lustre/%s/%s/target_obds/%s.",
 197                                obd->obd_type->typ_name, obd->obd_name,
 198                                osc_obd->obd_name);
 199                         lprocfs_remove(&lov_proc_dir);
 200                 }
 201         }
 202 #endif
 203
 204         rc = qos_add_tgt(obd, index);
 205         if (rc)
 206                 CERROR("qos_add_tgt failed %d\n", rc);
 207
 208         RETURN(0);
 209 }
 210
 211 static int lov_connect(const struct lu_env *env,
 212                        struct lustre_handle *conn, struct obd_device *obd,
 213                        struct obd_uuid *cluuid, struct obd_connect_data *data)
 214 {
 215         struct lov_obd *lov = &obd->u.lov;
 216         struct lov_tgt_desc *tgt;
 217         int i, rc;
 218         ENTRY;
 219
 220         CDEBUG(D_CONFIG, "connect #%d\n", lov->lov_connects);
 221
 222         rc = class_connect(conn, obd, cluuid);
 223         if (rc)
 224                 RETURN(rc);
 225
 226         /* Why should there ever be more than 1 connect? */
 227         lov->lov_connects++;
 228         LASSERT(lov->lov_connects == 1);
 229
 230         memset(&lov->lov_ocd, 0, sizeof(lov->lov_ocd));
 231         if (data)
 232                 lov->lov_ocd = *data;
 233
 234         lov_getref(obd);
 235         for (i = 0; i < lov->desc.ld_tgt_count; i++) {
 236                 tgt = lov->lov_tgts[i];
 237                 if (!tgt || obd_uuid_empty(&tgt->ltd_uuid))
 238                         continue;
 239                 /* Flags will be lowest common denominator */
 240                 rc = lov_connect_obd(obd, i, tgt->ltd_activate, &lov->lov_ocd);
 241                 if (rc) {
 242                         CERROR("%s: lov connect tgt %d failed: %d\n",
 243                                obd->obd_name, i, rc);
 244                         continue;
 245                 }
 246         }
 247         lov_putref(obd);
 248
 249         RETURN(0);
 250 }
 251
 252 static int lov_disconnect_obd(struct obd_device *obd, __u32 index)
 253 {
 254         cfs_proc_dir_entry_t *lov_proc_dir;
 255         struct lov_obd *lov = &obd->u.lov;
 256         struct obd_device *osc_obd =
 257                 class_exp2obd(lov->lov_tgts[index]->ltd_exp);
 258         int rc;
 259
 260         ENTRY;
 261
 262         CDEBUG(D_CONFIG, "%s: disconnecting target %s\n",
 263                obd->obd_name, osc_obd->obd_name);
 264
 265         if (lov->lov_tgts[index]->ltd_active) {
 266                 lov->lov_tgts[index]->ltd_active = 0;
 267                 lov->desc.ld_active_tgt_count--;
 268                 lov->lov_tgts[index]->ltd_exp->exp_obd->obd_inactive = 1;
 269         }
 270
 271         lov_proc_dir = lprocfs_srch(obd->obd_proc_entry, "target_obds");
 272         if (lov_proc_dir) {
 273                 cfs_proc_dir_entry_t *osc_symlink;
 274
 275                 osc_symlink = lprocfs_srch(lov_proc_dir, osc_obd->obd_name);
 276                 if (osc_symlink) {
 277                         lprocfs_remove(&osc_symlink);
 278                 } else {
 279                         CERROR("/proc/fs/lustre/%s/%s/target_obds/%s missing.",
 280                                obd->obd_type->typ_name, obd->obd_name,
 281                                osc_obd->obd_name);
 282                 }
 283         }
 284
 285         if (osc_obd) {
 286                 /* Pass it on to our clients.
 287                  * XXX This should be an argument to disconnect,
 288                  * XXX not a back-door flag on the OBD.  Ah well.
 289                  */
 290                 osc_obd->obd_force = obd->obd_force;
 291                 osc_obd->obd_fail = obd->obd_fail;
 292                 osc_obd->obd_no_recov = obd->obd_no_recov;
 293         }
 294
 295         obd_register_observer(osc_obd, NULL);
 296
 297         rc = obd_disconnect(lov->lov_tgts[index]->ltd_exp);
 298         if (rc) {
 299                 CERROR("Target %s disconnect error %d\n",
 300                        lov_uuid2str(lov, index), rc);
 301                 rc = 0;
 302         }
 303
 304         qos_del_tgt(obd, index);
 305
 306         lov->lov_tgts[index]->ltd_exp = NULL;
 307         RETURN(0);
 308 }
 309
 310 static int lov_del_target(struct obd_device *obd, __u32 index,
 311                           struct obd_uuid *uuidp, int gen);
 312
 313 static int lov_disconnect(struct obd_export *exp)
 314 {
 315         struct obd_device *obd = class_exp2obd(exp);
 316         struct lov_obd *lov = &obd->u.lov;
 317         int i, rc;
 318         ENTRY;
 319
 320         if (!lov->lov_tgts)
 321                 goto out;
 322
 323         /* Only disconnect the underlying layers on the final disconnect. */
 324         lov->lov_connects--;
 325         if (lov->lov_connects != 0) {
 326                 /* why should there be more than 1 connect? */
 327                 CERROR("disconnect #%d\n", lov->lov_connects);
 328                 goto out;
 329         }
 330
 331         /* Let's hold another reference so lov_del_obd doesn't spin through
 332            putref every time */
 333         lov_getref(obd);
 334         for (i = 0; i < lov->desc.ld_tgt_count; i++) {
 335                 if (lov->lov_tgts[i] && lov->lov_tgts[i]->ltd_exp) {
 336                         /* Disconnection is the last we know about an obd */
 337                         lov_del_target(obd, i, 0, lov->lov_tgts[i]->ltd_gen);
 338                 }
 339         }
 340         lov_putref(obd);
 341
 342 out:
 343         rc = class_disconnect(exp); /* bz 9811 */
 344         RETURN(rc);
 345 }
 346
 347 /* Error codes:
 348  *
 349  *  -EINVAL  : UUID can't be found in the LOV's target list
 350  *  -ENOTCONN: The UUID is found, but the target connection is bad (!)
 351  *  -EBADF   : The UUID is found, but the OBD is the wrong type (!)
 352  */
 353 static int lov_set_osc_active(struct obd_device *obd, struct obd_uuid *uuid,
 354                               int activate)
 355 {
 356         struct lov_obd *lov = &obd->u.lov;
 357         struct lov_tgt_desc *tgt;
 358         int i, rc = 0;
 359         ENTRY;
 360
 361         CDEBUG(D_INFO, "Searching in lov %p for uuid %s (activate=%d)\n",
 362                lov, uuid->uuid, activate);
 363
 364         lov_getref(obd);
 365         for (i = 0; i < lov->desc.ld_tgt_count; i++) {
 366                 tgt = lov->lov_tgts[i];
 367                 if (!tgt || !tgt->ltd_exp)
 368                         continue;
 369
 370                 CDEBUG(D_INFO, "lov idx %d is %s conn "LPX64"\n",
 371                        i, obd_uuid2str(&tgt->ltd_uuid),
 372                        tgt->ltd_exp->exp_handle.h_cookie);
 373                 if (obd_uuid_equals(uuid, &tgt->ltd_uuid))
 374                         break;
 375         }
 376
 377         if (i == lov->desc.ld_tgt_count)
 378                 GOTO(out, rc = -EINVAL);
 379
 380         if (lov->lov_tgts[i]->ltd_active == activate) {
 381                 CDEBUG(D_INFO, "OSC %s already %sactive!\n", uuid->uuid,
 382                        activate ? "" : "in");
 383                 GOTO(out, rc);
 384         }
 385
 386         CDEBUG(D_CONFIG, "Marking OSC %s %sactive\n", obd_uuid2str(uuid),
 387                activate ? "" : "in");
 388
 389         lov->lov_tgts[i]->ltd_active = activate;
 390
 391         if (activate) {
 392                 lov->desc.ld_active_tgt_count++;
 393                 lov->lov_tgts[i]->ltd_exp->exp_obd->obd_inactive = 0;
 394         } else {
 395                 lov->desc.ld_active_tgt_count--;
 396                 lov->lov_tgts[i]->ltd_exp->exp_obd->obd_inactive = 1;
 397         }
 398         /* remove any old qos penalty */
 399         lov->lov_tgts[i]->ltd_qos.ltq_penalty = 0;
 400
 401  out:
 402         lov_putref(obd);
 403         RETURN(rc);
 404 }
 405
 406 static int lov_notify(struct obd_device *obd, struct obd_device *watched,
 407                       enum obd_notify_event ev, void *data)
 408 {
 409         int rc = 0;
 410         ENTRY;
 411
 412         if (ev == OBD_NOTIFY_ACTIVE || ev == OBD_NOTIFY_INACTIVE) {
 413                 struct obd_uuid *uuid;
 414
 415                 LASSERT(watched);
 416
 417                 if (strcmp(watched->obd_type->typ_name, LUSTRE_OSC_NAME)) {
 418                         CERROR("unexpected notification of %s %s!\n",
 419                                watched->obd_type->typ_name,
 420                                watched->obd_name);
 421                         RETURN(-EINVAL);
 422                 }
 423                 uuid = &watched->u.cli.cl_target_uuid;
 424
 425                 /* Set OSC as active before notifying the observer, so the
 426                  * observer can use the OSC normally.
 427                  */
 428                 rc = lov_set_osc_active(obd, uuid, ev == OBD_NOTIFY_ACTIVE);
 429                 if (rc) {
 430                         CERROR("%sactivation of %s failed: %d\n",
 431                                (ev == OBD_NOTIFY_ACTIVE) ? "" : "de",
 432                                obd_uuid2str(uuid), rc);
 433                         RETURN(rc);
 434                 }
 435         }
 436
 437         /* Pass the notification up the chain. */
 438         if (watched) {
 439                 rc = obd_notify_observer(obd, watched, ev, data);
 440         } else {
 441                 /* NULL watched means all osc's in the lov (only for syncs) */
 442                 struct lov_obd *lov = &obd->u.lov;
 443                 struct obd_device *tgt_obd;
 444                 int i;
 445                 lov_getref(obd);
 446                 for (i = 0; i < lov->desc.ld_tgt_count; i++) {
 447                         if (!lov->lov_tgts[i])
 448                                 continue;
 449                         tgt_obd = class_exp2obd(lov->lov_tgts[i]->ltd_exp);
 450                         rc = obd_notify_observer(obd, tgt_obd, ev, data);
 451                         if (rc) {
 452                                 CERROR("%s: notify %s of %s failed %d\n",
 453                                        obd->obd_name,
 454                                        obd->obd_observer->obd_name,
 455                                        tgt_obd->obd_name, rc);
 456                                 break;
 457                         }
 458                 }
 459                 lov_putref(obd);
 460         }
 461
 462         RETURN(rc);
 463 }
 464
 465 static int lov_add_target(struct obd_device *obd, struct obd_uuid *uuidp,
 466                           __u32 index, int gen, int active)
 467 {
 468         struct lov_obd *lov = &obd->u.lov;
 469         struct lov_tgt_desc *tgt;
 470         int rc;
 471         ENTRY;
 472
 473         CDEBUG(D_CONFIG, "uuid:%s idx:%d gen:%d active:%d\n",
 474                uuidp->uuid, index, gen, active);
 475
 476         if (gen <= 0) {
 477                 CERROR("request to add OBD %s with invalid generation: %d\n",
 478                        uuidp->uuid, gen);
 479                 RETURN(-EINVAL);
 480         }
 481
 482         mutex_down(&lov->lov_lock);
 483
 484         if ((index < lov->lov_tgt_size) && (lov->lov_tgts[index] != NULL)) {
 485                 tgt = lov->lov_tgts[index];
 486                 CERROR("UUID %s already assigned at LOV target index %d\n",
 487                        obd_uuid2str(&tgt->ltd_uuid), index);
 488                 mutex_up(&lov->lov_lock);
 489                 RETURN(-EEXIST);
 490         }
 491
 492         if (index >= lov->lov_tgt_size) {
 493                 /* We need to reallocate the lov target array. */
 494                 struct lov_tgt_desc **newtgts, **old = NULL;
 495                 __u32 newsize, oldsize = 0;
 496
 497                 newsize = max(lov->lov_tgt_size, (__u32)2);
 498                 while (newsize < index + 1)
 499                         newsize = newsize << 1;
 500                 OBD_ALLOC(newtgts, sizeof(*newtgts) * newsize);
 501                 if (newtgts == NULL) {
 502                         mutex_up(&lov->lov_lock);
 503                         RETURN(-ENOMEM);
 504                 }
 505
 506                 if (lov->lov_tgt_size) {
 507                         memcpy(newtgts, lov->lov_tgts, sizeof(*newtgts) *
 508                                lov->lov_tgt_size);
 509                         old = lov->lov_tgts;
 510                         oldsize = lov->lov_tgt_size;
 511                 }
 512
 513                 lov->lov_tgts = newtgts;
 514                 lov->lov_tgt_size = newsize;
 515 #ifdef __KERNEL__
 516                 smp_rmb();
 517 #endif
 518                 if (old)
 519                         OBD_FREE(old, sizeof(*old) * oldsize);
 520
 521                 CDEBUG(D_CONFIG, "tgts: %p size: %d\n",
 522                        lov->lov_tgts, lov->lov_tgt_size);
 523         }
 524
 525
 526         OBD_ALLOC_PTR(tgt);
 527         if (!tgt) {
 528                 mutex_up(&lov->lov_lock);
 529                 RETURN(-ENOMEM);
 530         }
 531
 532         memset(tgt, 0, sizeof(*tgt));
 533         tgt->ltd_uuid = *uuidp;
 534         /* XXX - add a sanity check on the generation number. */
 535         tgt->ltd_gen = gen;
 536         tgt->ltd_index = index;
 537         tgt->ltd_activate = active;
 538         lov->lov_tgts[index] = tgt;
 539         if (index >= lov->desc.ld_tgt_count)
 540                 lov->desc.ld_tgt_count = index + 1;
 541         mutex_up(&lov->lov_lock);
 542
 543         CDEBUG(D_CONFIG, "idx=%d ltd_gen=%d ld_tgt_count=%d\n",
 544                 index, tgt->ltd_gen, lov->desc.ld_tgt_count);
 545
 546         if (lov->lov_connects == 0) {
 547                 /* lov_connect hasn't been called yet. We'll do the
 548                    lov_connect_obd on this target when that fn first runs,
 549                    because we don't know the connect flags yet. */
 550                 RETURN(0);
 551         }
 552
 553         lov_getref(obd);
 554
 555         rc = lov_connect_obd(obd, index, active, &lov->lov_ocd);
 556         if (rc)
 557                 GOTO(out, rc);
 558
 559         rc = lov_notify(obd, tgt->ltd_exp->exp_obd,
 560                         active ? OBD_NOTIFY_ACTIVE : OBD_NOTIFY_INACTIVE,
 561                         (void *)&index);
 562
 563 out:
 564         if (rc) {
 565                 CERROR("add failed (%d), deleting %s\n", rc,
 566                        obd_uuid2str(&tgt->ltd_uuid));
 567                 lov_del_target(obd, index, 0, 0);
 568         }
 569         lov_putref(obd);
 570         RETURN(rc);
 571 }
 572
 573 /* Schedule a target for deletion */
 574 static int lov_del_target(struct obd_device *obd, __u32 index,
 575                           struct obd_uuid *uuidp, int gen)
 576 {
 577         struct lov_obd *lov = &obd->u.lov;
 578         int count = lov->desc.ld_tgt_count;
 579         int rc = 0;
 580         ENTRY;
 581
 582         if (index >= count) {
 583                 CERROR("LOV target index %d >= number of LOV OBDs %d.\n",
 584                        index, count);
 585                 RETURN(-EINVAL);
 586         }
 587
 588         lov_getref(obd);
 589
 590         if (!lov->lov_tgts[index]) {
 591                 CERROR("LOV target at index %d is not setup.\n", index);
 592                 GOTO(out, rc = -EINVAL);
 593         }
 594
 595         if (uuidp && !obd_uuid_equals(uuidp, &lov->lov_tgts[index]->ltd_uuid)) {
 596                 CERROR("LOV target UUID %s at index %d doesn't match %s.\n",
 597                        lov_uuid2str(lov, index), index,
 598                        obd_uuid2str(uuidp));
 599                 GOTO(out, rc = -EINVAL);
 600         }
 601
 602         CDEBUG(D_CONFIG, "uuid: %s idx: %d gen: %d exp: %p active: %d\n",
 603                lov_uuid2str(lov, index), index,
 604                lov->lov_tgts[index]->ltd_gen, lov->lov_tgts[index]->ltd_exp,
 605                lov->lov_tgts[index]->ltd_active);
 606
 607         lov->lov_tgts[index]->ltd_reap = 1;
 608         lov->lov_death_row++;
 609         /* we really delete it from lov_putref */
 610 out:
 611         lov_putref(obd);
 612
 613         RETURN(rc);
 614 }
 615
 616 /* We are holding lov_lock */
 617 static void __lov_del_obd(struct obd_device *obd, __u32 index)
 618 {
 619         struct lov_obd *lov = &obd->u.lov;
 620         struct obd_device *osc_obd;
 621         struct lov_tgt_desc *tgt = lov->lov_tgts[index];
 622
 623         LASSERT(tgt);
 624         LASSERT(tgt->ltd_reap);
 625
 626         osc_obd = class_exp2obd(tgt->ltd_exp);
 627
 628         CDEBUG(D_CONFIG, "Removing tgt %s : %s\n",
 629                lov_uuid2str(lov, index),
 630                osc_obd ? osc_obd->obd_name : "<no obd>");
 631
 632         if (tgt->ltd_exp)
 633                 lov_disconnect_obd(obd, index);
 634
 635         /* XXX - right now there is a dependency on ld_tgt_count being the
 636          * maximum tgt index for computing the mds_max_easize. So we can't
 637          * shrink it. */
 638
 639         lov->lov_tgts[index] = NULL;
 640         OBD_FREE_PTR(tgt);
 641
 642         /* Manual cleanup - no cleanup logs to clean up the osc's.  We must
 643            do it ourselves. And we can't do it from lov_cleanup,
 644            because we just lost our only reference to it. */
 645         if (osc_obd)
 646                 class_manual_cleanup(osc_obd);
 647 }
 648
 649 void lov_fix_desc(struct lov_desc *desc)
 650 {
 651         if (desc->ld_default_stripe_size < PTLRPC_MAX_BRW_SIZE) {
 652                 LCONSOLE_WARN("Increasing default stripe size to min %u\n",
 653                               PTLRPC_MAX_BRW_SIZE);
 654                 desc->ld_default_stripe_size = PTLRPC_MAX_BRW_SIZE;
 655         } else if (desc->ld_default_stripe_size & (LOV_MIN_STRIPE_SIZE - 1)) {
 656                 desc->ld_default_stripe_size &= ~(LOV_MIN_STRIPE_SIZE - 1);
 657                 LCONSOLE_WARN("Changing default stripe size to "LPU64" (a "
 658                               "multiple of %u)\n",
 659                               desc->ld_default_stripe_size,LOV_MIN_STRIPE_SIZE);
 660         }
 661
 662         if (desc->ld_default_stripe_count == 0)
 663                 desc->ld_default_stripe_count = 1;
 664
 665         /* from lov_setstripe */
 666         if ((desc->ld_pattern != 0) &&
 667             (desc->ld_pattern != LOV_PATTERN_RAID0)) {
 668                 LCONSOLE_WARN("Unknown stripe pattern: %#x\n",desc->ld_pattern);
 669                 desc->ld_pattern = 0;
 670         }
 671
 672         if (desc->ld_qos_maxage == 0)
 673                 desc->ld_qos_maxage = QOS_DEFAULT_MAXAGE;
 674 }
 675
 676 static int lov_setup(struct obd_device *obd, struct lustre_cfg *lcfg)
 677 {
 678         struct lprocfs_static_vars lvars;
 679         struct lov_desc *desc;
 680         struct lov_obd *lov = &obd->u.lov;
 681         int count;
 682         ENTRY;
 683
 684         if (LUSTRE_CFG_BUFLEN(lcfg, 1) < 1) {
 685                 CERROR("LOV setup requires a descriptor\n");
 686                 RETURN(-EINVAL);
 687         }
 688
 689         desc = (struct lov_desc *)lustre_cfg_buf(lcfg, 1);
 690
 691         if (sizeof(*desc) > LUSTRE_CFG_BUFLEN(lcfg, 1)) {
 692                 CERROR("descriptor size wrong: %d > %d\n",
 693                        (int)sizeof(*desc), LUSTRE_CFG_BUFLEN(lcfg, 1));
 694                 RETURN(-EINVAL);
 695         }
 696
 697         if (desc->ld_magic != LOV_DESC_MAGIC) {
 698                 if (desc->ld_magic == __swab32(LOV_DESC_MAGIC)) {
 699                             CDEBUG(D_OTHER, "%s: Swabbing lov desc %p\n",
 700                                    obd->obd_name, desc);
 701                             lustre_swab_lov_desc(desc);
 702                 } else {
 703                         CERROR("%s: Bad lov desc magic: %#x\n",
 704                                obd->obd_name, desc->ld_magic);
 705                         RETURN(-EINVAL);
 706                 }
 707         }
 708
 709         lov_fix_desc(desc);
 710
 711         /* Because of 64-bit divide/mod operations only work with a 32-bit
 712          * divisor in a 32-bit kernel, we cannot support a stripe width
 713          * of 4GB or larger on 32-bit CPUs. */
 714         count = desc->ld_default_stripe_count;
 715         if ((count > 0 ? count : desc->ld_tgt_count) *
 716             desc->ld_default_stripe_size > 0xffffffff) {
 717                 CERROR("LOV: stripe width "LPU64"x%u > 4294967295 bytes\n",
 718                        desc->ld_default_stripe_size, count);
 719                 RETURN(-EINVAL);
 720         }
 721
 722         desc->ld_active_tgt_count = 0;
 723         lov->desc = *desc;
 724         lov->lov_tgt_size = 0;
 725         sema_init(&lov->lov_lock, 1);
 726         atomic_set(&lov->lov_refcount, 0);
 727         INIT_LIST_HEAD(&lov->lov_qos.lq_oss_list);
 728         init_rwsem(&lov->lov_qos.lq_rw_sem);
 729         lov->lov_qos.lq_dirty = 1;
 730         lov->lov_qos.lq_dirty_rr = 1;
 731         lov->lov_qos.lq_reset = 1;
 732         /* Default priority is toward free space balance */
 733         lov->lov_qos.lq_prio_free = 232;
 734
 735         lprocfs_init_vars(lov, &lvars);
 736         lprocfs_obd_setup(obd, lvars.obd_vars);
 737 #ifdef LPROCFS
 738         {
 739                 cfs_proc_dir_entry_t *entry;
 740
 741                 entry = create_proc_entry("target_obd", 0444,
 742                                           obd->obd_proc_entry);
 743                 if (entry != NULL) {
 744                         entry->proc_fops = &lov_proc_target_fops;
 745                         entry->data = obd;
 746                 }
 747         }
 748 #endif
 749
 750         RETURN(0);
 751 }
 752
 753 static int lov_precleanup(struct obd_device *obd, enum obd_cleanup_stage stage)
 754 {
 755         int rc = 0;
 756         ENTRY;
 757
 758         switch (stage) {
 759         case OBD_CLEANUP_EARLY: {
 760                 struct lov_obd *lov = &obd->u.lov;
 761                 int i;
 762                 for (i = 0; i < lov->desc.ld_tgt_count; i++) {
 763                         if (!lov->lov_tgts[i] || !lov->lov_tgts[i]->ltd_active)
 764                                 continue;
 765                         obd_precleanup(class_exp2obd(lov->lov_tgts[i]->ltd_exp),
 766                                        OBD_CLEANUP_EARLY);
 767                 }
 768                 break;
 769         }
 770         case OBD_CLEANUP_EXPORTS:
 771                 break;
 772         case OBD_CLEANUP_SELF_EXP:
 773                 rc = obd_llog_finish(obd, 0);
 774                 if (rc != 0)
 775                         CERROR("failed to cleanup llogging subsystems\n");
 776                 break;
 777         case OBD_CLEANUP_OBD:
 778                 break;
 779         }
 780         RETURN(rc);
 781 }
 782
 783 static int lov_cleanup(struct obd_device *obd)
 784 {
 785         struct lov_obd *lov = &obd->u.lov;
 786
 787         lprocfs_obd_cleanup(obd);
 788         if (lov->lov_tgts) {
 789                 int i;
 790                 for (i = 0; i < lov->desc.ld_tgt_count; i++) {
 791                         if (lov->lov_tgts[i]) {
 792                                 /* Inactive targets may never have connected */
 793                                 if (lov->lov_tgts[i]->ltd_active ||
 794                                     atomic_read(&lov->lov_refcount))
 795                                         /* We should never get here - these
 796                                            should have been removed in the
 797                                            disconnect. */
 798                                         CERROR("lov tgt %d not cleaned!"
 799                                                " deathrow=%d, lovrc=%d\n",
 800                                                i, lov->lov_death_row,
 801                                                atomic_read(&lov->lov_refcount));
 802                                 lov_del_target(obd, i, 0, 0);
 803                         }
 804                 }
 805                 OBD_FREE(lov->lov_tgts, sizeof(*lov->lov_tgts) *
 806                          lov->lov_tgt_size);
 807                 lov->lov_tgt_size = 0;
 808         }
 809
 810         if (lov->lov_qos.lq_rr_size)
 811                 OBD_FREE(lov->lov_qos.lq_rr_array, lov->lov_qos.lq_rr_size);
 812
 813         RETURN(0);
 814 }
 815
 816 static int lov_process_config(struct obd_device *obd, obd_count len, void *buf)
 817 {
 818         struct lustre_cfg *lcfg = buf;
 819         struct obd_uuid obd_uuid;
 820         int cmd;
 821         int rc = 0;
 822         ENTRY;
 823
 824         switch(cmd = lcfg->lcfg_command) {
 825         case LCFG_LOV_ADD_OBD:
 826         case LCFG_LOV_ADD_INA:
 827         case LCFG_LOV_DEL_OBD: {
 828                 __u32 index;
 829                 int gen;
 830                 /* lov_modify_tgts add  0:lov_mdsA  1:ost1_UUID  2:0  3:1 */
 831                 if (LUSTRE_CFG_BUFLEN(lcfg, 1) > sizeof(obd_uuid.uuid))
 832                         GOTO(out, rc = -EINVAL);
 833
 834                 obd_str2uuid(&obd_uuid,  lustre_cfg_buf(lcfg, 1));
 835
 836                 if (sscanf(lustre_cfg_buf(lcfg, 2), "%d", &index) != 1)
 837                         GOTO(out, rc = -EINVAL);
 838                 if (sscanf(lustre_cfg_buf(lcfg, 3), "%d", &gen) != 1)
 839                         GOTO(out, rc = -EINVAL);
 840                 if (cmd == LCFG_LOV_ADD_OBD)
 841                         rc = lov_add_target(obd, &obd_uuid, index, gen, 1);
 842                 else if (cmd == LCFG_LOV_ADD_INA)
 843                         rc = lov_add_target(obd, &obd_uuid, index, gen, 0);
 844                 else
 845                         rc = lov_del_target(obd, index, &obd_uuid, gen);
 846                 GOTO(out, rc);
 847         }
 848         case LCFG_PARAM: {
 849                 struct lprocfs_static_vars lvars;
 850                 struct lov_desc *desc = &(obd->u.lov.desc);
 851
 852                 if (!desc)
 853                         GOTO(out, rc = -EINVAL);
 854
 855                 lprocfs_init_vars(lov, &lvars);
 856
 857                 rc = class_process_proc_param(PARAM_LOV, lvars.obd_vars,
 858                                               lcfg, obd);
 859                 GOTO(out, rc);
 860         }
 861         default: {
 862                 CERROR("Unknown command: %d\n", lcfg->lcfg_command);
 863                 GOTO(out, rc = -EINVAL);
 864
 865         }
 866         }
 867 out:
 868         RETURN(rc);
 869 }
 870
 871 #ifndef log2
 872 #define log2(n) ffz(~(n))
 873 #endif
 874
 875 static int lov_clear_orphans(struct obd_export *export, struct obdo *src_oa,
 876                              struct lov_stripe_md **ea,
 877                              struct obd_trans_info *oti)
 878 {
 879         struct lov_obd *lov;
 880         struct obdo *tmp_oa;
 881         struct obd_uuid *ost_uuid = NULL;
 882         int rc = 0, i;
 883         ENTRY;
 884
 885         LASSERT(src_oa->o_valid & OBD_MD_FLFLAGS &&
 886                 src_oa->o_flags == OBD_FL_DELORPHAN);
 887
 888         lov = &export->exp_obd->u.lov;
 889
 890         OBDO_ALLOC(tmp_oa);
 891         if (tmp_oa == NULL)
 892                 RETURN(-ENOMEM);
 893
 894         if (src_oa->o_valid & OBD_MD_FLINLINE) {
 895                 ost_uuid = (struct obd_uuid *)src_oa->o_inline;
 896                 CDEBUG(D_HA, "clearing orphans only for %s\n",
 897                        ost_uuid->uuid);
 898         }
 899
 900         lov_getref(export->exp_obd);
 901         for (i = 0; i < lov->desc.ld_tgt_count; i++) {
 902                 struct lov_stripe_md obj_md;
 903                 struct lov_stripe_md *obj_mdp = &obj_md;
 904                 struct lov_tgt_desc *tgt;
 905                 int err;
 906
 907                 tgt = lov->lov_tgts[i];
 908                 if (!tgt)
 909                         continue;
 910
 911                 /* if called for a specific target, we don't
 912                    care if it is not active. */
 913                 if (!lov->lov_tgts[i]->ltd_active && ost_uuid == NULL) {
 914                         CDEBUG(D_HA, "lov idx %d inactive\n", i);
 915                         continue;
 916                 }
 917
 918                 if (ost_uuid && !obd_uuid_equals(ost_uuid, &tgt->ltd_uuid))
 919                         continue;
 920
 921                 CDEBUG(D_CONFIG,"Clear orphans for %d:%s\n", i,
 922                        obd_uuid2str(ost_uuid));
 923
 924                 memcpy(tmp_oa, src_oa, sizeof(*tmp_oa));
 925
 926                 LASSERT(lov->lov_tgts[i]->ltd_exp);
 927                 /* XXX: LOV STACKING: use real "obj_mdp" sub-data */
 928                 err = obd_create(lov->lov_tgts[i]->ltd_exp,
 929                                  tmp_oa, &obj_mdp, oti);
 930                 if (err)
 931                         /* This export will be disabled until it is recovered,
 932                            and then orphan recovery will be completed. */
 933                         CERROR("error in orphan recovery on OST idx %d/%d: "
 934                                "rc = %d\n", i, lov->desc.ld_tgt_count, err);
 935
 936                 if (ost_uuid)
 937                         break;
 938         }
 939         lov_putref(export->exp_obd);
 940
 941         OBDO_FREE(tmp_oa);
 942         RETURN(rc);
 943 }
 944
 945 static int lov_recreate(struct obd_export *exp, struct obdo *src_oa,
 946                         struct lov_stripe_md **ea, struct obd_trans_info *oti)
 947 {
 948         struct lov_stripe_md *obj_mdp, *lsm;
 949         struct lov_obd *lov = &exp->exp_obd->u.lov;
 950         unsigned ost_idx;
 951         int rc, i;
 952         ENTRY;
 953
 954         LASSERT(src_oa->o_valid & OBD_MD_FLFLAGS &&
 955                 src_oa->o_flags & OBD_FL_RECREATE_OBJS);
 956
 957         OBD_ALLOC(obj_mdp, sizeof(*obj_mdp));
 958         if (obj_mdp == NULL)
 959                 RETURN(-ENOMEM);
 960
 961         ost_idx = src_oa->o_nlink;
 962         lsm = *ea;
 963         if (lsm == NULL)
 964                 GOTO(out, rc = -EINVAL);
 965         if (ost_idx >= lov->desc.ld_tgt_count ||
 966             !lov->lov_tgts[ost_idx])
 967                 GOTO(out, rc = -EINVAL);
 968
 969         for (i = 0; i < lsm->lsm_stripe_count; i++) {
 970                 if (lsm->lsm_oinfo[i]->loi_ost_idx == ost_idx) {
 971                         if (lsm->lsm_oinfo[i]->loi_id != src_oa->o_id)
 972                                 GOTO(out, rc = -EINVAL);
 973                         break;
 974                 }
 975         }
 976         if (i == lsm->lsm_stripe_count)
 977                 GOTO(out, rc = -EINVAL);
 978
 979         rc = obd_create(lov->lov_tgts[ost_idx]->ltd_exp, src_oa, &obj_mdp, oti);
 980 out:
 981         OBD_FREE(obj_mdp, sizeof(*obj_mdp));
 982         RETURN(rc);
 983 }
 984
 985 /* the LOV expects oa->o_id to be set to the LOV object id */
 986 static int lov_create(struct obd_export *exp, struct obdo *src_oa,
 987                       struct lov_stripe_md **ea, struct obd_trans_info *oti)
 988 {
 989         struct lov_obd *lov;
 990         struct obd_info oinfo;
 991         struct lov_request_set *set = NULL;
 992         struct lov_request *req;
 993         struct obd_statfs osfs;
 994         __u64 maxage;
 995         int rc = 0;
 996         ENTRY;
 997
 998         LASSERT(ea != NULL);
 999         if (exp == NULL)
1000                 RETURN(-EINVAL);
1001
1002         if ((src_oa->o_valid & OBD_MD_FLFLAGS) &&
1003             src_oa->o_flags == OBD_FL_DELORPHAN) {
1004                 rc = lov_clear_orphans(exp, src_oa, ea, oti);
1005                 RETURN(rc);
1006         }
1007
1008         lov = &exp->exp_obd->u.lov;
1009         if (!lov->desc.ld_active_tgt_count)
1010                 RETURN(-EIO);
1011
1012         /* Recreate a specific object id at the given OST index */
1013         if ((src_oa->o_valid & OBD_MD_FLFLAGS) &&
1014             (src_oa->o_flags & OBD_FL_RECREATE_OBJS)) {
1015                  rc = lov_recreate(exp, src_oa, ea, oti);
1016                  RETURN(rc);
1017         }
1018
1019         maxage = cfs_time_shift_64(-lov->desc.ld_qos_maxage);
1020         obd_statfs_rqset(exp->exp_obd, &osfs, maxage);
1021
1022         rc = lov_prep_create_set(exp, &oinfo, ea, src_oa, oti, &set);
1023         if (rc)
1024                 RETURN(rc);
1025
1026         list_for_each_entry(req, &set->set_list, rq_link) {
1027                 /* XXX: LOV STACKING: use real "obj_mdp" sub-data */
1028                 rc = obd_create(lov->lov_tgts[req->rq_idx]->ltd_exp,
1029                                 req->rq_oi.oi_oa, &req->rq_oi.oi_md, oti);
1030                 lov_update_create_set(set, req, rc);
1031         }
1032         rc = lov_fini_create_set(set, ea);
1033         RETURN(rc);
1034 }
1035
1036 #define ASSERT_LSM_MAGIC(lsmp)                                                  \
1037 do {                                                                            \
1038         LASSERT((lsmp) != NULL);                                                \
1039         LASSERTF(((lsmp)->lsm_magic == LOV_MAGIC ||                             \
1040                  (lsmp)->lsm_magic == LOV_MAGIC_JOIN), "%p->lsm_magic=%x\n",    \
1041                  (lsmp), (lsmp)->lsm_magic);                                    \
1042 } while (0)
1043
1044 static int lov_destroy(struct obd_export *exp, struct obdo *oa,
1045                        struct lov_stripe_md *lsm, struct obd_trans_info *oti,
1046                        struct obd_export *md_exp)
1047 {
1048         struct lov_request_set *set;
1049         struct obd_info oinfo;
1050         struct lov_request *req;
1051         struct list_head *pos;
1052         struct lov_obd *lov;
1053         int rc = 0, err;
1054         ENTRY;
1055
1056         ASSERT_LSM_MAGIC(lsm);
1057
1058         if (!exp || !exp->exp_obd)
1059                 RETURN(-ENODEV);
1060
1061         if (oa->o_valid & OBD_MD_FLCOOKIE) {
1062                 LASSERT(oti);
1063                 LASSERT(oti->oti_logcookies);
1064         }
1065
1066         lov = &exp->exp_obd->u.lov;
1067         rc = lov_prep_destroy_set(exp, &oinfo, oa, lsm, oti, &set);
1068         if (rc)
1069                 RETURN(rc);
1070
1071         list_for_each (pos, &set->set_list) {
1072                 int err;
1073                 req = list_entry(pos, struct lov_request, rq_link);
1074
1075                 if (oa->o_valid & OBD_MD_FLCOOKIE)
1076                         oti->oti_logcookies = set->set_cookies + req->rq_stripe;
1077
1078                 err = obd_destroy(lov->lov_tgts[req->rq_idx]->ltd_exp,
1079                                   req->rq_oi.oi_oa, NULL, oti, NULL);
1080                 err = lov_update_common_set(set, req, err);
1081                 if (err) {
1082                         CERROR("error: destroying objid "LPX64" subobj "
1083                                LPX64" on OST idx %d: rc = %d\n",
1084                                oa->o_id, req->rq_oi.oi_oa->o_id,
1085                                req->rq_idx, err);
1086                         if (!rc)
1087                                 rc = err;
1088                 }
1089         }
1090
1091         if (rc == 0) {
1092                 LASSERT(lsm_op_find(lsm->lsm_magic) != NULL);
1093                 rc = lsm_op_find(lsm->lsm_magic)->lsm_destroy(lsm, oa, md_exp);
1094         }
1095         err = lov_fini_destroy_set(set);
1096         RETURN(rc ? rc : err);
1097 }
1098
1099 static int lov_getattr(struct obd_export *exp, struct obd_info *oinfo)
1100 {
1101         struct lov_request_set *set;
1102         struct lov_request *req;
1103         struct list_head *pos;
1104         struct lov_obd *lov;
1105         int err = 0, rc = 0;
1106         ENTRY;
1107
1108         LASSERT(oinfo);
1109         ASSERT_LSM_MAGIC(oinfo->oi_md);
1110
1111         if (!exp || !exp->exp_obd)
1112                 RETURN(-ENODEV);
1113
1114         lov = &exp->exp_obd->u.lov;
1115
1116         rc = lov_prep_getattr_set(exp, oinfo, &set);
1117         if (rc)
1118                 RETURN(rc);
1119
1120         list_for_each (pos, &set->set_list) {
1121                 req = list_entry(pos, struct lov_request, rq_link);
1122
1123                 CDEBUG(D_INFO, "objid "LPX64"[%d] has subobj "LPX64" at idx "
1124                        "%u\n", oinfo->oi_oa->o_id, req->rq_stripe,
1125                        req->rq_oi.oi_oa->o_id, req->rq_idx);
1126
1127                 rc = obd_getattr(lov->lov_tgts[req->rq_idx]->ltd_exp,
1128                                  &req->rq_oi);
1129                 err = lov_update_common_set(set, req, rc);
1130                 if (err) {
1131                         CERROR("error: getattr objid "LPX64" subobj "
1132                                LPX64" on OST idx %d: rc = %d\n",
1133                                oinfo->oi_oa->o_id, req->rq_oi.oi_oa->o_id,
1134                                req->rq_idx, err);
1135                         break;
1136                 }
1137         }
1138
1139         rc = lov_fini_getattr_set(set);
1140         if (err)
1141                 rc = err;
1142         RETURN(rc);
1143 }
1144
1145 static int lov_getattr_interpret(struct ptlrpc_request_set *rqset,
1146                                  void *data, int rc)
1147 {
1148         struct lov_request_set *lovset = (struct lov_request_set *)data;
1149         int err;
1150         ENTRY;
1151
1152         /* don't do attribute merge if this aysnc op failed */
1153         if (rc)
1154                 lovset->set_completes = 0;
1155         err = lov_fini_getattr_set(lovset);
1156         RETURN(rc ? rc : err);
1157 }
1158
1159 static int lov_getattr_async(struct obd_export *exp, struct obd_info *oinfo,
1160                               struct ptlrpc_request_set *rqset)
1161 {
1162         struct lov_request_set *lovset;
1163         struct lov_obd *lov;
1164         struct list_head *pos;
1165         struct lov_request *req;
1166         int rc = 0, err;
1167         ENTRY;
1168
1169         LASSERT(oinfo);
1170         ASSERT_LSM_MAGIC(oinfo->oi_md);
1171
1172         if (!exp || !exp->exp_obd)
1173                 RETURN(-ENODEV);
1174
1175         lov = &exp->exp_obd->u.lov;
1176
1177         rc = lov_prep_getattr_set(exp, oinfo, &lovset);
1178         if (rc)
1179                 RETURN(rc);
1180
1181         CDEBUG(D_INFO, "objid "LPX64": %ux%u byte stripes\n",
1182                oinfo->oi_md->lsm_object_id, oinfo->oi_md->lsm_stripe_count,
1183                oinfo->oi_md->lsm_stripe_size);
1184
1185         list_for_each (pos, &lovset->set_list) {
1186                 req = list_entry(pos, struct lov_request, rq_link);
1187
1188                 CDEBUG(D_INFO, "objid "LPX64"[%d] has subobj "LPX64" at idx "
1189                        "%u\n", oinfo->oi_oa->o_id, req->rq_stripe,
1190                        req->rq_oi.oi_oa->o_id, req->rq_idx);
1191                 rc = obd_getattr_async(lov->lov_tgts[req->rq_idx]->ltd_exp,
1192                                        &req->rq_oi, rqset);
1193                 if (rc) {
1194                         CERROR("error: getattr objid "LPX64" subobj "
1195                                LPX64" on OST idx %d: rc = %d\n",
1196                                oinfo->oi_oa->o_id, req->rq_oi.oi_oa->o_id,
1197                                req->rq_idx, rc);
1198                         GOTO(out, rc);
1199                 }
1200         }
1201
1202         if (!list_empty(&rqset->set_requests)) {
1203                 LASSERT(rc == 0);
1204                 LASSERT (rqset->set_interpret == NULL);
1205                 rqset->set_interpret = lov_getattr_interpret;
1206                 rqset->set_arg = (void *)lovset;
1207                 RETURN(rc);
1208         }
1209 out:
1210         if (rc)
1211                 lovset->set_completes = 0;
1212         err = lov_fini_getattr_set(lovset);
1213         RETURN(rc ? rc : err);
1214 }
1215
1216 static int lov_setattr(struct obd_export *exp, struct obd_info *oinfo,
1217                        struct obd_trans_info *oti)
1218 {
1219         struct lov_request_set *set;
1220         struct lov_obd *lov;
1221         struct list_head *pos;
1222         struct lov_request *req;
1223         int err = 0, rc = 0;
1224         ENTRY;
1225
1226         LASSERT(oinfo);
1227         ASSERT_LSM_MAGIC(oinfo->oi_md);
1228
1229         if (!exp || !exp->exp_obd)
1230                 RETURN(-ENODEV);
1231
1232         /* for now, we only expect the following updates here */
1233         LASSERT(!(oinfo->oi_oa->o_valid & ~(OBD_MD_FLID | OBD_MD_FLTYPE |
1234                                             OBD_MD_FLMODE | OBD_MD_FLATIME |
1235                                             OBD_MD_FLMTIME | OBD_MD_FLCTIME |
1236                                             OBD_MD_FLFLAGS | OBD_MD_FLSIZE |
1237                                             OBD_MD_FLGROUP | OBD_MD_FLUID |
1238                                             OBD_MD_FLGID | OBD_MD_FLINLINE |
1239                                             OBD_MD_FLFID | OBD_MD_FLGENER)));
1240         lov = &exp->exp_obd->u.lov;
1241         rc = lov_prep_setattr_set(exp, oinfo, oti, &set);
1242         if (rc)
1243                 RETURN(rc);
1244
1245         list_for_each (pos, &set->set_list) {
1246                 req = list_entry(pos, struct lov_request, rq_link);
1247
1248                 rc = obd_setattr(lov->lov_tgts[req->rq_idx]->ltd_exp,
1249                                  &req->rq_oi, NULL);
1250                 err = lov_update_setattr_set(set, req, rc);
1251                 if (err) {
1252                         CERROR("error: setattr objid "LPX64" subobj "
1253                                LPX64" on OST idx %d: rc = %d\n",
1254                                set->set_oi->oi_oa->o_id,
1255                                req->rq_oi.oi_oa->o_id, req->rq_idx, err);
1256                         if (!rc)
1257                                 rc = err;
1258                 }
1259         }
1260         err = lov_fini_setattr_set(set);
1261         if (!rc)
1262                 rc = err;
1263         RETURN(rc);
1264 }
1265
1266 static int lov_setattr_interpret(struct ptlrpc_request_set *rqset,
1267                                  void *data, int rc)
1268 {
1269         struct lov_request_set *lovset = (struct lov_request_set *)data;
1270         int err;
1271         ENTRY;
1272
1273         if (rc)
1274                 lovset->set_completes = 0;
1275         err = lov_fini_setattr_set(lovset);
1276         RETURN(rc ? rc : err);
1277 }
1278
1279 /* If @oti is given, the request goes from MDS and responses from OSTs are not
1280    needed. Otherwise, a client is waiting for responses. */
1281 static int lov_setattr_async(struct obd_export *exp, struct obd_info *oinfo,
1282                              struct obd_trans_info *oti,
1283                              struct ptlrpc_request_set *rqset)
1284 {
1285         struct lov_request_set *set;
1286         struct lov_request *req;
1287         struct list_head *pos;
1288         struct lov_obd *lov;
1289         int rc = 0;
1290         ENTRY;
1291
1292         LASSERT(oinfo);
1293         ASSERT_LSM_MAGIC(oinfo->oi_md);
1294         if (oinfo->oi_oa->o_valid & OBD_MD_FLCOOKIE) {
1295                 LASSERT(oti);
1296                 LASSERT(oti->oti_logcookies);
1297         }
1298
1299         if (!exp || !exp->exp_obd)
1300                 RETURN(-ENODEV);
1301
1302         lov = &exp->exp_obd->u.lov;
1303         rc = lov_prep_setattr_set(exp, oinfo, oti, &set);
1304         if (rc)
1305                 RETURN(rc);
1306
1307         CDEBUG(D_INFO, "objid "LPX64": %ux%u byte stripes\n",
1308                oinfo->oi_md->lsm_object_id, oinfo->oi_md->lsm_stripe_count,
1309                oinfo->oi_md->lsm_stripe_size);
1310
1311         list_for_each (pos, &set->set_list) {
1312                 req = list_entry(pos, struct lov_request, rq_link);
1313
1314                 if (oinfo->oi_oa->o_valid & OBD_MD_FLCOOKIE)
1315                         oti->oti_logcookies = set->set_cookies + req->rq_stripe;
1316
1317                 CDEBUG(D_INFO, "objid "LPX64"[%d] has subobj "LPX64" at idx "
1318                        "%u\n", oinfo->oi_oa->o_id, req->rq_stripe,
1319                        req->rq_oi.oi_oa->o_id, req->rq_idx);
1320
1321                 rc = obd_setattr_async(lov->lov_tgts[req->rq_idx]->ltd_exp,
1322                                        &req->rq_oi, oti, rqset);
1323                 if (rc) {
1324                         CERROR("error: setattr objid "LPX64" subobj "
1325                                LPX64" on OST idx %d: rc = %d\n",
1326                                set->set_oi->oi_oa->o_id,
1327                                req->rq_oi.oi_oa->o_id,
1328                                req->rq_idx, rc);
1329                         break;
1330                 }
1331         }
1332
1333         /* If we are not waiting for responses on async requests, return. */
1334         if (rc || !rqset || list_empty(&rqset->set_requests)) {
1335                 int err;
1336                 if (rc)
1337                         set->set_completes = 0;
1338                 err = lov_fini_setattr_set(set);
1339                 RETURN(rc ? rc : err);
1340         }
1341
1342         LASSERT(rqset->set_interpret == NULL);
1343         rqset->set_interpret = lov_setattr_interpret;
1344         rqset->set_arg = (void *)set;
1345
1346         RETURN(0);
1347 }
1348
1349 static int lov_punch_interpret(struct ptlrpc_request_set *rqset,
1350                                void *data, int rc)
1351 {
1352         struct lov_request_set *lovset = (struct lov_request_set *)data;
1353         int err;
1354         ENTRY;
1355
1356         if (rc)
1357                 lovset->set_completes = 0;
1358         err = lov_fini_punch_set(lovset);
1359         RETURN(rc ? rc : err);
1360 }
1361
1362 /* FIXME: maybe we'll just make one node the authoritative attribute node, then
1363  * we can send this 'punch' to just the authoritative node and the nodes
1364  * that the punch will affect. */
1365 static int lov_punch(struct obd_export *exp, struct obd_info *oinfo,
1366                      struct obd_trans_info *oti,
1367                      struct ptlrpc_request_set *rqset)
1368 {
1369         struct lov_request_set *set;
1370         struct lov_obd *lov;
1371         struct list_head *pos;
1372         struct lov_request *req;
1373         int rc = 0;
1374         ENTRY;
1375
1376         LASSERT(oinfo);
1377         ASSERT_LSM_MAGIC(oinfo->oi_md);
1378
1379         if (!exp || !exp->exp_obd)
1380                 RETURN(-ENODEV);
1381
1382         lov = &exp->exp_obd->u.lov;
1383         rc = lov_prep_punch_set(exp, oinfo, oti, &set);
1384         if (rc)
1385                 RETURN(rc);
1386
1387         list_for_each (pos, &set->set_list) {
1388                 req = list_entry(pos, struct lov_request, rq_link);
1389
1390                 rc = obd_punch(lov->lov_tgts[req->rq_idx]->ltd_exp,
1391                                &req->rq_oi, NULL, rqset);
1392                 if (rc) {
1393                         CERROR("error: punch objid "LPX64" subobj "LPX64
1394                                " on OST idx %d: rc = %d\n",
1395                                set->set_oi->oi_oa->o_id,
1396                                req->rq_oi.oi_oa->o_id, req->rq_idx, rc);
1397                         break;
1398                 }
1399         }
1400
1401         if (rc || list_empty(&rqset->set_requests)) {
1402                 int err;
1403                 err = lov_fini_punch_set(set);
1404                 RETURN(rc ? rc : err);
1405         }
1406
1407         LASSERT(rqset->set_interpret == NULL);
1408         rqset->set_interpret = lov_punch_interpret;
1409         rqset->set_arg = (void *)set;
1410
1411         RETURN(0);
1412 }
1413
1414 static int lov_sync(struct obd_export *exp, struct obdo *oa,
1415                     struct lov_stripe_md *lsm, obd_off start, obd_off end,
1416                     void *capa)
1417 {
1418         struct lov_request_set *set;
1419         struct obd_info oinfo;
1420         struct lov_obd *lov;
1421         struct list_head *pos;
1422         struct lov_request *req;
1423         int err = 0, rc = 0;
1424         ENTRY;
1425
1426         ASSERT_LSM_MAGIC(lsm);
1427
1428         if (!exp->exp_obd)
1429                 RETURN(-ENODEV);
1430
1431         lov = &exp->exp_obd->u.lov;
1432         rc = lov_prep_sync_set(exp, &oinfo, oa, lsm, start, end, &set);
1433         if (rc)
1434                 RETURN(rc);
1435
1436         list_for_each (pos, &set->set_list) {
1437                 req = list_entry(pos, struct lov_request, rq_link);
1438
1439                 rc = obd_sync(lov->lov_tgts[req->rq_idx]->ltd_exp,
1440                               req->rq_oi.oi_oa, NULL,
1441                               req->rq_oi.oi_policy.l_extent.start,
1442                               req->rq_oi.oi_policy.l_extent.end, capa);
1443                 err = lov_update_common_set(set, req, rc);
1444                 if (err) {
1445                         CERROR("error: fsync objid "LPX64" subobj "LPX64
1446                                " on OST idx %d: rc = %d\n",
1447                                set->set_oi->oi_oa->o_id,
1448                                req->rq_oi.oi_oa->o_id, req->rq_idx, rc);
1449                         if (!rc)
1450                                 rc = err;
1451                 }
1452         }
1453         err = lov_fini_sync_set(set);
1454         if (!rc)
1455                 rc = err;
1456         RETURN(rc);
1457 }
1458
1459 static int lov_brw_check(struct lov_obd *lov, struct obd_info *lov_oinfo,
1460                          obd_count oa_bufs, struct brw_page *pga)
1461 {
1462         struct obd_info oinfo = { { { 0 } } };
1463         int i, rc = 0;
1464
1465         oinfo.oi_oa = lov_oinfo->oi_oa;
1466
1467         /* The caller just wants to know if there's a chance that this
1468          * I/O can succeed */
1469         for (i = 0; i < oa_bufs; i++) {
1470                 int stripe = lov_stripe_number(lov_oinfo->oi_md, pga[i].off);
1471                 int ost = lov_oinfo->oi_md->lsm_oinfo[stripe]->loi_ost_idx;
1472                 obd_off start, end;
1473
1474                 if (!lov_stripe_intersects(lov_oinfo->oi_md, i, pga[i].off,
1475                                            pga[i].off + pga[i].count,
1476                                            &start, &end))
1477                         continue;
1478
1479                 if (!lov->lov_tgts[ost] || !lov->lov_tgts[ost]->ltd_active) {
1480                         CDEBUG(D_HA, "lov idx %d inactive\n", ost);
1481                         return -EIO;
1482                 }
1483
1484                 rc = obd_brw(OBD_BRW_CHECK, lov->lov_tgts[ost]->ltd_exp, &oinfo,
1485                              1, &pga[i], NULL);
1486                 if (rc)
1487                         break;
1488         }
1489         return rc;
1490 }
1491
1492 static int lov_brw(int cmd, struct obd_export *exp, struct obd_info *oinfo,
1493                    obd_count oa_bufs, struct brw_page *pga,
1494                    struct obd_trans_info *oti)
1495 {
1496         struct lov_request_set *set;
1497         struct lov_request *req;
1498         struct list_head *pos;
1499         struct lov_obd *lov = &exp->exp_obd->u.lov;
1500         int err, rc = 0;
1501         ENTRY;
1502
1503         ASSERT_LSM_MAGIC(oinfo->oi_md);
1504
1505         if (cmd == OBD_BRW_CHECK) {
1506                 rc = lov_brw_check(lov, oinfo, oa_bufs, pga);
1507                 RETURN(rc);
1508         }
1509
1510         rc = lov_prep_brw_set(exp, oinfo, oa_bufs, pga, oti, &set);
1511         if (rc)
1512                 RETURN(rc);
1513
1514         list_for_each (pos, &set->set_list) {
1515                 struct obd_export *sub_exp;
1516                 struct brw_page *sub_pga;
1517                 req = list_entry(pos, struct lov_request, rq_link);
1518
1519                 sub_exp = lov->lov_tgts[req->rq_idx]->ltd_exp;
1520                 sub_pga = set->set_pga + req->rq_pgaidx;
1521                 rc = obd_brw(cmd, sub_exp, &req->rq_oi, req->rq_oabufs,
1522                              sub_pga, oti);
1523                 if (rc)
1524                         break;
1525                 lov_update_common_set(set, req, rc);
1526         }
1527
1528         err = lov_fini_brw_set(set);
1529         if (!rc)
1530                 rc = err;
1531         RETURN(rc);
1532 }
1533
1534 static int lov_brw_interpret(struct ptlrpc_request_set *reqset, void *data,
1535                              int rc)
1536 {
1537         struct lov_request_set *lovset = (struct lov_request_set *)data;
1538         ENTRY;
1539
1540         if (rc) {
1541                 lovset->set_completes = 0;
1542                 lov_fini_brw_set(lovset);
1543         } else {
1544                 rc = lov_fini_brw_set(lovset);
1545         }
1546
1547         RETURN(rc);
1548 }
1549
1550 static int lov_brw_async(int cmd, struct obd_export *exp,
1551                          struct obd_info *oinfo, obd_count oa_bufs,
1552                          struct brw_page *pga, struct obd_trans_info *oti,
1553                          struct ptlrpc_request_set *set)
1554 {
1555         struct lov_request_set *lovset;
1556         struct lov_request *req;
1557         struct list_head *pos;
1558         struct lov_obd *lov = &exp->exp_obd->u.lov;
1559         int rc = 0;
1560         ENTRY;
1561
1562         LASSERT(oinfo);
1563         ASSERT_LSM_MAGIC(oinfo->oi_md);
1564
1565         if (cmd == OBD_BRW_CHECK) {
1566                 rc = lov_brw_check(lov, oinfo, oa_bufs, pga);
1567                 RETURN(rc);
1568         }
1569
1570         rc = lov_prep_brw_set(exp, oinfo, oa_bufs, pga, oti, &lovset);
1571         if (rc)
1572                 RETURN(rc);
1573
1574         list_for_each (pos, &lovset->set_list) {
1575                 struct obd_export *sub_exp;
1576                 struct brw_page *sub_pga;
1577                 req = list_entry(pos, struct lov_request, rq_link);
1578
1579                 sub_exp = lov->lov_tgts[req->rq_idx]->ltd_exp;
1580                 sub_pga = lovset->set_pga + req->rq_pgaidx;
1581                 rc = obd_brw_async(cmd, sub_exp, &req->rq_oi, req->rq_oabufs,
1582                                    sub_pga, oti, set);
1583                 if (rc)
1584                         GOTO(out, rc);
1585                 lov_update_common_set(lovset, req, rc);
1586         }
1587         LASSERT(rc == 0);
1588         LASSERT(set->set_interpret == NULL);
1589         set->set_interpret = (set_interpreter_func)lov_brw_interpret;
1590         set->set_arg = (void *)lovset;
1591
1592         RETURN(rc);
1593 out:
1594         lov_fini_brw_set(lovset);
1595         RETURN(rc);
1596 }
1597
1598 static int lov_ap_make_ready(void *data, int cmd)
1599 {
1600         struct lov_async_page *lap = LAP_FROM_COOKIE(data);
1601
1602         return lap->lap_caller_ops->ap_make_ready(lap->lap_caller_data, cmd);
1603 }
1604
1605 static int lov_ap_refresh_count(void *data, int cmd)
1606 {
1607         struct lov_async_page *lap = LAP_FROM_COOKIE(data);
1608
1609         return lap->lap_caller_ops->ap_refresh_count(lap->lap_caller_data,
1610                                                      cmd);
1611 }
1612
1613 static void lov_ap_fill_obdo(void *data, int cmd, struct obdo *oa)
1614 {
1615         struct lov_async_page *lap = LAP_FROM_COOKIE(data);
1616
1617         lap->lap_caller_ops->ap_fill_obdo(lap->lap_caller_data, cmd, oa);
1618         /* XXX woah, shouldn't we be altering more here?  size? */
1619         oa->o_id = lap->lap_loi_id;
1620         oa->o_gr = lap->lap_loi_gr;
1621         oa->o_valid |= OBD_MD_FLGROUP;
1622         oa->o_stripe_idx = lap->lap_stripe;
1623 }
1624
1625 static void lov_ap_update_obdo(void *data, int cmd, struct obdo *oa,
1626                                obd_valid valid)
1627 {
1628         struct lov_async_page *lap = LAP_FROM_COOKIE(data);
1629
1630         lap->lap_caller_ops->ap_update_obdo(lap->lap_caller_data, cmd,oa,valid);
1631 }
1632
1633 static int lov_ap_completion(void *data, int cmd, struct obdo *oa, int rc)
1634 {
1635         struct lov_async_page *lap = LAP_FROM_COOKIE(data);
1636
1637         /* in a raid1 regime this would down a count of many ios
1638          * in flight, onl calling the caller_ops completion when all
1639          * the raid1 ios are complete */
1640         rc = lap->lap_caller_ops->ap_completion(lap->lap_caller_data,cmd,oa,rc);
1641         return rc;
1642 }
1643
1644 static struct obd_capa *lov_ap_lookup_capa(void *data, int cmd)
1645 {
1646         struct lov_async_page *lap = LAP_FROM_COOKIE(data);
1647         return lap->lap_caller_ops->ap_lookup_capa(lap->lap_caller_data, cmd);
1648 }
1649
1650 static struct obd_async_page_ops lov_async_page_ops = {
1651         .ap_make_ready =        lov_ap_make_ready,
1652         .ap_refresh_count =     lov_ap_refresh_count,
1653         .ap_fill_obdo =         lov_ap_fill_obdo,
1654         .ap_update_obdo =       lov_ap_update_obdo,
1655         .ap_completion =        lov_ap_completion,
1656         .ap_lookup_capa =       lov_ap_lookup_capa,
1657 };
1658
1659 int lov_prep_async_page(struct obd_export *exp, struct lov_stripe_md *lsm,
1660                            struct lov_oinfo *loi, cfs_page_t *page,
1661                            obd_off offset, struct obd_async_page_ops *ops,
1662                            void *data, void **res)
1663 {
1664         struct lov_obd *lov = &exp->exp_obd->u.lov;
1665         struct lov_async_page *lap;
1666         int rc = 0;
1667         ENTRY;
1668
1669         if (!page) {
1670                 int i = 0;
1671                 /* Find an existing osc so we can get it's stupid sizeof(*oap).
1672                    Only because of this layering limitation will a client
1673                    mount with no osts fail */
1674                 while (!lov->lov_tgts || !lov->lov_tgts[i] ||
1675                        !lov->lov_tgts[i]->ltd_exp) {
1676                         i++;
1677                         if (i >= lov->desc.ld_tgt_count)
1678                                 RETURN(-ENOMEDIUM);
1679                 }
1680                 rc = size_round(sizeof(*lap)) +
1681                         obd_prep_async_page(lov->lov_tgts[i]->ltd_exp, NULL,
1682                                             NULL, NULL, 0, NULL, NULL, NULL);
1683                 RETURN(rc);
1684         }
1685         ASSERT_LSM_MAGIC(lsm);
1686         LASSERT(loi == NULL);
1687
1688         lap = *res;
1689         lap->lap_magic = LOV_AP_MAGIC;
1690         lap->lap_caller_ops = ops;
1691         lap->lap_caller_data = data;
1692
1693         /* for now only raid 0 which passes through */
1694         lap->lap_stripe = lov_stripe_number(lsm, offset);
1695         lov_stripe_offset(lsm, offset, lap->lap_stripe, &lap->lap_sub_offset);
1696         loi = lsm->lsm_oinfo[lap->lap_stripe];
1697
1698         /* so the callback doesn't need the lsm */
1699         lap->lap_loi_id = loi->loi_id;
1700         lap->lap_loi_gr = lsm->lsm_object_gr;
1701         LASSERT(lsm->lsm_object_gr > 0);
1702
1703         lap->lap_sub_cookie = (void *)lap + size_round(sizeof(*lap));
1704
1705         rc = obd_prep_async_page(lov->lov_tgts[loi->loi_ost_idx]->ltd_exp,
1706                                  lsm, loi, page, lap->lap_sub_offset,
1707                                  &lov_async_page_ops, lap,
1708                                  &lap->lap_sub_cookie);
1709         if (rc)
1710                 RETURN(rc);
1711         CDEBUG(D_CACHE, "lap %p page %p cookie %p off "LPU64"\n", lap, page,
1712                lap->lap_sub_cookie, offset);
1713         RETURN(0);
1714 }
1715
1716 static int lov_queue_async_io(struct obd_export *exp,
1717                               struct lov_stripe_md *lsm,
1718                               struct lov_oinfo *loi, void *cookie,
1719                               int cmd, obd_off off, int count,
1720                               obd_flag brw_flags, obd_flag async_flags)
1721 {
1722         struct lov_obd *lov = &exp->exp_obd->u.lov;
1723         struct lov_async_page *lap;
1724         int rc;
1725
1726         LASSERT(loi == NULL);
1727
1728         ASSERT_LSM_MAGIC(lsm);
1729
1730         lap = LAP_FROM_COOKIE(cookie);
1731
1732         loi = lsm->lsm_oinfo[lap->lap_stripe];
1733
1734         rc = obd_queue_async_io(lov->lov_tgts[loi->loi_ost_idx]->ltd_exp, lsm,
1735                                 loi, lap->lap_sub_cookie, cmd, off, count,
1736                                 brw_flags, async_flags);
1737         RETURN(rc);
1738 }
1739
1740 static int lov_set_async_flags(struct obd_export *exp,
1741                                struct lov_stripe_md *lsm,
1742                                struct lov_oinfo *loi, void *cookie,
1743                                obd_flag async_flags)
1744 {
1745         struct lov_obd *lov = &exp->exp_obd->u.lov;
1746         struct lov_async_page *lap;
1747         int rc;
1748
1749         LASSERT(loi == NULL);
1750
1751         ASSERT_LSM_MAGIC(lsm);
1752
1753         lap = LAP_FROM_COOKIE(cookie);
1754
1755         loi = lsm->lsm_oinfo[lap->lap_stripe];
1756
1757         rc = obd_set_async_flags(lov->lov_tgts[loi->loi_ost_idx]->ltd_exp,
1758                                  lsm, loi, lap->lap_sub_cookie, async_flags);
1759         RETURN(rc);
1760 }
1761
1762 static int lov_queue_group_io(struct obd_export *exp,
1763                               struct lov_stripe_md *lsm,
1764                               struct lov_oinfo *loi,
1765                               struct obd_io_group *oig, void *cookie,
1766                               int cmd, obd_off off, int count,
1767                               obd_flag brw_flags, obd_flag async_flags)
1768 {
1769         struct lov_obd *lov = &exp->exp_obd->u.lov;
1770         struct lov_async_page *lap;
1771         int rc;
1772
1773         LASSERT(loi == NULL);
1774
1775         ASSERT_LSM_MAGIC(lsm);
1776
1777         lap = LAP_FROM_COOKIE(cookie);
1778
1779         loi = lsm->lsm_oinfo[lap->lap_stripe];
1780
1781         rc = obd_queue_group_io(lov->lov_tgts[loi->loi_ost_idx]->ltd_exp, lsm,
1782                                 loi, oig, lap->lap_sub_cookie, cmd, off, count,
1783                                 brw_flags, async_flags);
1784         RETURN(rc);
1785 }
1786
1787 /* this isn't exactly optimal.  we may have queued sync io in oscs on
1788  * all stripes, but we don't record that fact at queue time.  so we
1789  * trigger sync io on all stripes. */
1790 static int lov_trigger_group_io(struct obd_export *exp,
1791                                 struct lov_stripe_md *lsm,
1792                                 struct lov_oinfo *loi,
1793                                 struct obd_io_group *oig)
1794 {
1795         struct lov_obd *lov = &exp->exp_obd->u.lov;
1796         int rc = 0, i, err;
1797
1798         LASSERT(loi == NULL);
1799
1800         ASSERT_LSM_MAGIC(lsm);
1801
1802         for (i = 0; i < lsm->lsm_stripe_count; i++) {
1803                 loi = lsm->lsm_oinfo[i];
1804                 if (!lov->lov_tgts[loi->loi_ost_idx] ||
1805                     !lov->lov_tgts[loi->loi_ost_idx]->ltd_active) {
1806                         CDEBUG(D_HA, "lov idx %d inactive\n", loi->loi_ost_idx);
1807                         continue;
1808                 }
1809
1810                 err = obd_trigger_group_io(lov->lov_tgts[loi->loi_ost_idx]->ltd_exp,
1811                                            lsm, loi, oig);
1812                 if (rc == 0 && err != 0)
1813                         rc = err;
1814         };
1815         RETURN(rc);
1816 }
1817
1818 static int lov_teardown_async_page(struct obd_export *exp,
1819                                    struct lov_stripe_md *lsm,
1820                                    struct lov_oinfo *loi, void *cookie)
1821 {
1822         struct lov_obd *lov = &exp->exp_obd->u.lov;
1823         struct lov_async_page *lap;
1824         int rc;
1825
1826         LASSERT(loi == NULL);
1827
1828         ASSERT_LSM_MAGIC(lsm);
1829
1830         lap = LAP_FROM_COOKIE(cookie);
1831
1832         loi = lsm->lsm_oinfo[lap->lap_stripe];
1833
1834         rc = obd_teardown_async_page(lov->lov_tgts[loi->loi_ost_idx]->ltd_exp,
1835                                      lsm, loi, lap->lap_sub_cookie);
1836         if (rc) {
1837                 CERROR("unable to teardown sub cookie %p: %d\n",
1838                        lap->lap_sub_cookie, rc);
1839                 RETURN(rc);
1840         }
1841         RETURN(rc);
1842 }
1843
1844 static int lov_enqueue_interpret(struct ptlrpc_request_set *rqset,
1845                                  void *data, int rc)
1846 {
1847         struct lov_request_set *lovset = (struct lov_request_set *)data;
1848         ENTRY;
1849         rc = lov_fini_enqueue_set(lovset, lovset->set_ei->ei_mode, rc, rqset);
1850         RETURN(rc);
1851 }
1852
1853 static int lov_enqueue(struct obd_export *exp, struct obd_info *oinfo,
1854                        struct ldlm_enqueue_info *einfo,
1855                        struct ptlrpc_request_set *rqset)
1856 {
1857         ldlm_mode_t mode = einfo->ei_mode;
1858         struct lov_request_set *set;
1859         struct lov_request *req;
1860         struct list_head *pos;
1861         struct lov_obd *lov;
1862         ldlm_error_t rc;
1863         ENTRY;
1864
1865         LASSERT(oinfo);
1866         ASSERT_LSM_MAGIC(oinfo->oi_md);
1867         LASSERT(mode == (mode & -mode));
1868
1869         /* we should never be asked to replay a lock this way. */
1870         LASSERT((oinfo->oi_flags & LDLM_FL_REPLAY) == 0);
1871
1872         if (!exp || !exp->exp_obd)
1873                 RETURN(-ENODEV);
1874
1875         lov = &exp->exp_obd->u.lov;
1876         rc = lov_prep_enqueue_set(exp, oinfo, einfo, &set);
1877         if (rc)
1878                 RETURN(rc);
1879
1880         list_for_each (pos, &set->set_list) {
1881                 req = list_entry(pos, struct lov_request, rq_link);
1882
1883                 rc = obd_enqueue(lov->lov_tgts[req->rq_idx]->ltd_exp,
1884                                  &req->rq_oi, einfo, rqset);
1885                 if (rc != ELDLM_OK)
1886                         GOTO(out, rc);
1887         }
1888
1889         if (rqset && !list_empty(&rqset->set_requests)) {
1890                 LASSERT(rc == 0);
1891                 LASSERT(rqset->set_interpret == NULL);
1892                 rqset->set_interpret = lov_enqueue_interpret;
1893                 rqset->set_arg = (void *)set;
1894                 RETURN(rc);
1895         }
1896 out:
1897         rc = lov_fini_enqueue_set(set, mode, rc, rqset);
1898         RETURN(rc);
1899 }
1900
1901 static int lov_match(struct obd_export *exp, struct lov_stripe_md *lsm,
1902                      __u32 type, ldlm_policy_data_t *policy, __u32 mode,
1903                      int *flags, void *data, struct lustre_handle *lockh)
1904 {
1905         struct lov_request_set *set;
1906         struct obd_info oinfo;
1907         struct lov_request *req;
1908         struct list_head *pos;
1909         struct lov_obd *lov = &exp->exp_obd->u.lov;
1910         struct lustre_handle *lov_lockhp;
1911         int lov_flags, rc = 0;
1912         ENTRY;
1913
1914         ASSERT_LSM_MAGIC(lsm);
1915         LASSERT((*flags & LDLM_FL_TEST_LOCK) || mode == (mode & -mode));
1916
1917         if (!exp || !exp->exp_obd)
1918                 RETURN(-ENODEV);
1919
1920         lov = &exp->exp_obd->u.lov;
1921         rc = lov_prep_match_set(exp, &oinfo, lsm, policy, mode, lockh, &set);
1922         if (rc)
1923                 RETURN(rc);
1924
1925         list_for_each (pos, &set->set_list) {
1926                 ldlm_policy_data_t sub_policy;
1927                 req = list_entry(pos, struct lov_request, rq_link);
1928                 lov_lockhp = set->set_lockh->llh_handles + req->rq_stripe;
1929                 LASSERT(lov_lockhp);
1930
1931                 lov_flags = *flags;
1932                 sub_policy.l_extent = req->rq_oi.oi_policy.l_extent;
1933
1934                 rc = obd_match(lov->lov_tgts[req->rq_idx]->ltd_exp,
1935                                req->rq_oi.oi_md, type, &sub_policy,
1936                                mode, &lov_flags, data, lov_lockhp);
1937                 rc = lov_update_match_set(set, req, rc);
1938                 if (rc <= 0)
1939                         break;
1940         }
1941         lov_fini_match_set(set, mode, *flags);
1942         RETURN(rc);
1943 }
1944
1945 static int lov_change_cbdata(struct obd_export *exp,
1946                              struct lov_stripe_md *lsm, ldlm_iterator_t it,
1947                              void *data)
1948 {
1949         struct lov_obd *lov;
1950         int rc = 0, i;
1951         ENTRY;
1952
1953         ASSERT_LSM_MAGIC(lsm);
1954
1955         if (!exp || !exp->exp_obd)
1956                 RETURN(-ENODEV);
1957
1958         LASSERT(lsm->lsm_object_gr > 0);
1959
1960         lov = &exp->exp_obd->u.lov;
1961         for (i = 0; i < lsm->lsm_stripe_count; i++) {
1962                 struct lov_stripe_md submd;
1963                 struct lov_oinfo *loi = lsm->lsm_oinfo[i];
1964
1965                 if (!lov->lov_tgts[loi->loi_ost_idx]) {
1966                         CDEBUG(D_HA, "lov idx %d NULL \n", loi->loi_ost_idx);
1967                         continue;
1968                 }
1969
1970                 submd.lsm_object_id = loi->loi_id;
1971                 submd.lsm_object_gr = lsm->lsm_object_gr;
1972                 submd.lsm_stripe_count = 0;
1973                 rc = obd_change_cbdata(lov->lov_tgts[loi->loi_ost_idx]->ltd_exp,
1974                                        &submd, it, data);
1975         }
1976         RETURN(rc);
1977 }
1978
1979 static int lov_cancel(struct obd_export *exp, struct lov_stripe_md *lsm,
1980                       __u32 mode, struct lustre_handle *lockh)
1981 {
1982         struct lov_request_set *set;
1983         struct obd_info oinfo;
1984         struct lov_request *req;
1985         struct list_head *pos;
1986         struct lov_obd *lov = &exp->exp_obd->u.lov;
1987         struct lustre_handle *lov_lockhp;
1988         int err = 0, rc = 0;
1989         ENTRY;
1990
1991         ASSERT_LSM_MAGIC(lsm);
1992
1993         if (!exp || !exp->exp_obd)
1994                 RETURN(-ENODEV);
1995
1996         LASSERT(lsm->lsm_object_gr > 0);
1997         LASSERT(lockh);
1998         lov = &exp->exp_obd->u.lov;
1999         rc = lov_prep_cancel_set(exp, &oinfo, lsm, mode, lockh, &set);
2000         if (rc)
2001                 RETURN(rc);
2002
2003         list_for_each (pos, &set->set_list) {
2004                 req = list_entry(pos, struct lov_request, rq_link);
2005                 lov_lockhp = set->set_lockh->llh_handles + req->rq_stripe;
2006
2007                 rc = obd_cancel(lov->lov_tgts[req->rq_idx]->ltd_exp,
2008                                 req->rq_oi.oi_md, mode, lov_lockhp);
2009                 rc = lov_update_common_set(set, req, rc);
2010                 if (rc) {
2011                         CERROR("error: cancel objid "LPX64" subobj "
2012                                LPX64" on OST idx %d: rc = %d\n",
2013                                lsm->lsm_object_id,
2014                                req->rq_oi.oi_md->lsm_object_id,
2015                                req->rq_idx, rc);
2016                         err = rc;
2017                 }
2018
2019         }
2020         lov_fini_cancel_set(set);
2021         RETURN(err);
2022 }
2023
2024 static int lov_cancel_unused(struct obd_export *exp,
2025                              struct lov_stripe_md *lsm,
2026                              int flags, void *opaque)
2027 {
2028         struct lov_obd *lov;
2029         int rc = 0, i;
2030         ENTRY;
2031
2032         if (!exp || !exp->exp_obd)
2033                 RETURN(-ENODEV);
2034
2035         lov = &exp->exp_obd->u.lov;
2036         if (lsm == NULL) {
2037                 for (i = 0; i < lov->desc.ld_tgt_count; i++) {
2038                         int err;
2039                         if (!lov->lov_tgts[i] || !lov->lov_tgts[i]->ltd_exp)
2040                                 continue;
2041
2042                         err = obd_cancel_unused(lov->lov_tgts[i]->ltd_exp, NULL,
2043                                                 flags, opaque);
2044                         if (!rc)
2045                                 rc = err;
2046                 }
2047                 RETURN(rc);
2048         }
2049
2050         ASSERT_LSM_MAGIC(lsm);
2051
2052         LASSERT(lsm->lsm_object_gr > 0);
2053         for (i = 0; i < lsm->lsm_stripe_count; i++) {
2054                 struct lov_stripe_md submd;
2055                 struct lov_oinfo *loi = lsm->lsm_oinfo[i];
2056                 int err;
2057
2058                 if (!lov->lov_tgts[loi->loi_ost_idx]) {
2059                         CDEBUG(D_HA, "lov idx %d NULL\n", loi->loi_ost_idx);
2060                         continue;
2061                 }
2062
2063                 if (!lov->lov_tgts[loi->loi_ost_idx]->ltd_active)
2064                         CDEBUG(D_HA, "lov idx %d inactive\n", loi->loi_ost_idx);
2065
2066                 submd.lsm_object_id = loi->loi_id;
2067                 submd.lsm_object_gr = lsm->lsm_object_gr;
2068                 submd.lsm_stripe_count = 0;
2069                 err = obd_cancel_unused(lov->lov_tgts[loi->loi_ost_idx]->ltd_exp,
2070                                         &submd, flags, opaque);
2071                 if (err && lov->lov_tgts[loi->loi_ost_idx]->ltd_active) {
2072                         CERROR("error: cancel unused objid "LPX64" subobj "LPX64
2073                                " on OST idx %d: rc = %d\n", lsm->lsm_object_id,
2074                                loi->loi_id, loi->loi_ost_idx, err);
2075                         if (!rc)
2076                                 rc = err;
2077                 }
2078         }
2079         RETURN(rc);
2080 }
2081
2082 static int lov_join_lru(struct obd_export *exp,
2083                         struct lov_stripe_md *lsm, int join)
2084 {
2085         struct lov_obd *lov;
2086         int i, count = 0;
2087         ENTRY;
2088
2089         ASSERT_LSM_MAGIC(lsm);
2090         if (!exp || !exp->exp_obd)
2091                 RETURN(-ENODEV);
2092
2093         lov = &exp->exp_obd->u.lov;
2094         for (i = 0; i < lsm->lsm_stripe_count; i++) {
2095                 struct lov_stripe_md submd;
2096                 struct lov_oinfo *loi = lsm->lsm_oinfo[i];
2097                 int rc = 0;
2098
2099                 if (!lov->lov_tgts[loi->loi_ost_idx]) {
2100                         CDEBUG(D_HA, "lov idx %d NULL\n", loi->loi_ost_idx);
2101                         continue;
2102                 }
2103
2104                 if (!lov->lov_tgts[loi->loi_ost_idx]->ltd_active)
2105                         CDEBUG(D_HA, "lov idx %d inactive\n", loi->loi_ost_idx);
2106
2107                 submd.lsm_object_id = loi->loi_id;
2108                 submd.lsm_object_gr = lsm->lsm_object_gr;
2109                 submd.lsm_stripe_count = 0;
2110                 rc = obd_join_lru(lov->lov_tgts[loi->loi_ost_idx]->ltd_exp,
2111                                   &submd, join);
2112                 if (rc < 0) {
2113                         CERROR("join lru failed. objid: "LPX64" subobj: "LPX64
2114                                " ostidx: %d rc: %d\n", lsm->lsm_object_id,
2115                                loi->loi_id, loi->loi_ost_idx, rc);
2116                         return rc;
2117                 } else {
2118                         count += rc;
2119                 }
2120         }
2121         RETURN(count);
2122 }
2123
2124 static int lov_statfs_interpret(struct ptlrpc_request_set *rqset,
2125                                 void *data, int rc)
2126 {
2127         struct lov_request_set *lovset = (struct lov_request_set *)data;
2128         int err;
2129         ENTRY;
2130
2131         if (rc)
2132                 lovset->set_completes = 0;
2133
2134         err = lov_fini_statfs_set(lovset);
2135         RETURN(rc ? rc : err);
2136 }
2137
2138 static int lov_statfs_async(struct obd_device *obd, struct obd_info *oinfo,
2139                             __u64 max_age, struct ptlrpc_request_set *rqset)
2140 {
2141         struct lov_request_set *set;
2142         struct lov_request *req;
2143         struct list_head *pos;
2144         struct lov_obd *lov;
2145         int rc = 0;
2146         ENTRY;
2147
2148         LASSERT(oinfo != NULL);
2149         LASSERT(oinfo->oi_osfs != NULL);
2150
2151         lov = &obd->u.lov;
2152         rc = lov_prep_statfs_set(obd, oinfo, &set);
2153         if (rc)
2154                 RETURN(rc);
2155
2156         list_for_each (pos, &set->set_list) {
2157                 struct obd_device *osc_obd;
2158
2159                 req = list_entry(pos, struct lov_request, rq_link);
2160
2161                 osc_obd = class_exp2obd(lov->lov_tgts[req->rq_idx]->ltd_exp);
2162                 rc = obd_statfs_async(osc_obd, &req->rq_oi, max_age, rqset);
2163                 if (rc)
2164                         break;
2165         }
2166
2167         if (rc || list_empty(&rqset->set_requests)) {
2168                 int err;
2169                 if (rc)
2170                         set->set_completes = 0;
2171                 err = lov_fini_statfs_set(set);
2172                 RETURN(rc ? rc : err);
2173         }
2174
2175         LASSERT(rqset->set_interpret == NULL);
2176         rqset->set_interpret = lov_statfs_interpret;
2177         rqset->set_arg = (void *)set;
2178         RETURN(0);
2179 }
2180
2181 static int lov_statfs(struct obd_device *obd, struct obd_statfs *osfs,
2182                       __u64 max_age)
2183 {
2184         struct lov_obd *lov = &obd->u.lov;
2185         struct obd_statfs lov_sfs;
2186         int set = 0;
2187         int rc = 0, err;
2188         int i;
2189         ENTRY;
2190
2191         /* We only get block data from the OBD */
2192         for (i = 0; i < lov->desc.ld_tgt_count; i++) {
2193                 if (!lov->lov_tgts[i] || !lov->lov_tgts[i]->ltd_active) {
2194                         CDEBUG(D_HA, "lov idx %d inactive\n", i);
2195                         continue;
2196                 }
2197
2198                 err = obd_statfs(class_exp2obd(lov->lov_tgts[i]->ltd_exp),
2199                                  &lov_sfs, max_age);
2200                 if (err) {
2201                         if (lov->lov_tgts[i]->ltd_active && !rc)
2202                                 rc = err;
2203                         continue;
2204                 }
2205                 lov_update_statfs(class_exp2obd(lov->lov_tgts[i]->ltd_exp),
2206                                   osfs, &lov_sfs, set);
2207                 set++;
2208         }
2209
2210         err = lov_fini_statfs(obd, osfs, set);
2211         qos_update(lov);
2212
2213         RETURN(rc ? rc : err);
2214 }
2215
2216 static int lov_iocontrol(unsigned int cmd, struct obd_export *exp, int len,
2217                          void *karg, void *uarg)
2218 {
2219         struct obd_device *obddev = class_exp2obd(exp);
2220         struct lov_obd *lov = &obddev->u.lov;
2221         int i, rc, count = lov->desc.ld_tgt_count;
2222         struct obd_uuid *uuidp;
2223         ENTRY;
2224
2225         switch (cmd) {
2226         case OBD_IOC_LOV_GET_CONFIG: {
2227                 struct obd_ioctl_data *data;
2228                 struct lov_desc *desc;
2229                 char *buf = NULL;
2230                 __u32 *genp;
2231
2232                 len = 0;
2233                 if (obd_ioctl_getdata(&buf, &len, (void *)uarg))
2234                         RETURN(-EINVAL);
2235
2236                 data = (struct obd_ioctl_data *)buf;
2237
2238                 if (sizeof(*desc) > data->ioc_inllen1) {
2239                         obd_ioctl_freedata(buf, len);
2240                         RETURN(-EINVAL);
2241                 }
2242
2243                 if (sizeof(uuidp->uuid) * count > data->ioc_inllen2) {
2244                         obd_ioctl_freedata(buf, len);
2245                         RETURN(-EINVAL);
2246                 }
2247
2248                 if (sizeof(__u32) * count > data->ioc_inllen3) {
2249                         obd_ioctl_freedata(buf, len);
2250                         RETURN(-EINVAL);
2251                 }
2252
2253                 desc = (struct lov_desc *)data->ioc_inlbuf1;
2254                 memcpy(desc, &(lov->desc), sizeof(*desc));
2255
2256                 uuidp = (struct obd_uuid *)data->ioc_inlbuf2;
2257                 genp = (__u32 *)data->ioc_inlbuf3;
2258                 /* the uuid will be empty for deleted OSTs */
2259                 for (i = 0; i < count; i++, uuidp++, genp++) {
2260                         if (!lov->lov_tgts[i])
2261                                 continue;
2262                         *uuidp = lov->lov_tgts[i]->ltd_uuid;
2263                         *genp = lov->lov_tgts[i]->ltd_gen;
2264                 }
2265
2266                 rc = copy_to_user((void *)uarg, buf, len);
2267                 if (rc)
2268                         rc = -EFAULT;
2269                 obd_ioctl_freedata(buf, len);
2270                 break;
2271         }
2272         case LL_IOC_LOV_SETSTRIPE:
2273                 rc = lov_setstripe(exp, karg, uarg);
2274                 break;
2275         case LL_IOC_LOV_GETSTRIPE:
2276                 rc = lov_getstripe(exp, karg, uarg);
2277                 break;
2278         case LL_IOC_LOV_SETEA:
2279                 rc = lov_setea(exp, karg, uarg);
2280                 break;
2281         default: {
2282                 int set = 0;
2283
2284                 if (count == 0)
2285                         RETURN(-ENOTTY);
2286
2287                 rc = 0;
2288                 for (i = 0; i < count; i++) {
2289                         int err;
2290
2291                         /* OST was disconnected */
2292                         if (!lov->lov_tgts[i] || !lov->lov_tgts[i]->ltd_exp)
2293                                 continue;
2294
2295                         err = obd_iocontrol(cmd, lov->lov_tgts[i]->ltd_exp,
2296                                             len, karg, uarg);
2297                         if (err == -ENODATA && cmd == OBD_IOC_POLL_QUOTACHECK) {
2298                                 RETURN(err);
2299                         } else if (err) {
2300                                 if (lov->lov_tgts[i]->ltd_active) {
2301                                         CDEBUG(err == -ENOTTY ?
2302                                                D_IOCTL : D_WARNING,
2303                                                "iocontrol OSC %s on OST "
2304                                                "idx %d cmd %x: err = %d\n",
2305                                                lov_uuid2str(lov, i),
2306                                                i, cmd, err);
2307                                         if (!rc)
2308                                                 rc = err;
2309                                 }
2310                         } else {
2311                                 set = 1;
2312                         }
2313                 }
2314                 if (!set && !rc)
2315                         rc = -EIO;
2316         }
2317         }
2318
2319         RETURN(rc);
2320 }
2321
2322 static int lov_get_info(struct obd_export *exp, __u32 keylen,
2323                         void *key, __u32 *vallen, void *val)
2324 {
2325         struct obd_device *obddev = class_exp2obd(exp);
2326         struct lov_obd *lov = &obddev->u.lov;
2327         int i, rc;
2328         ENTRY;
2329
2330         if (!vallen || !val)
2331                 RETURN(-EFAULT);
2332
2333         lov_getref(obddev);
2334
2335         if (KEY_IS("lock_to_stripe")) {
2336                 struct {
2337                         char name[16];
2338                         struct ldlm_lock *lock;
2339                         struct lov_stripe_md *lsm;
2340                 } *data = key;
2341                 struct ldlm_res_id *res_id = &data->lock->l_resource->lr_name;
2342                 struct lov_oinfo *loi;
2343                 __u32 *stripe = val;
2344
2345                 if (*vallen < sizeof(*stripe))
2346                         GOTO(out, rc = -EFAULT);
2347                 *vallen = sizeof(*stripe);
2348
2349                 /* XXX This is another one of those bits that will need to
2350                  * change if we ever actually support nested LOVs.  It uses
2351                  * the lock's export to find out which stripe it is. */
2352                 /* XXX - it's assumed all the locks for deleted OSTs have
2353                  * been cancelled. Also, the export for deleted OSTs will
2354                  * be NULL and won't match the lock's export. */
2355                 for (i = 0; i < data->lsm->lsm_stripe_count; i++) {
2356                         loi = data->lsm->lsm_oinfo[i];
2357                         if (!lov->lov_tgts[loi->loi_ost_idx])
2358                                 continue;
2359                         if (lov->lov_tgts[loi->loi_ost_idx]->ltd_exp ==
2360                             data->lock->l_conn_export &&
2361                             loi->loi_id == res_id->name[0] &&
2362                             loi->loi_gr == res_id->name[2]) {
2363                                 *stripe = i;
2364                                 GOTO(out, rc = 0);
2365                         }
2366                 }
2367                 LDLM_ERROR(data->lock, "lock on inode without such object");
2368                 dump_lsm(D_ERROR, data->lsm);
2369                 GOTO(out, rc = -ENXIO);
2370         } else if (KEY_IS(KEY_LAST_ID)) {
2371                 struct obd_id_info *info = val;
2372                 int size = sizeof(obd_id);
2373                 struct lov_tgt_desc *tgt;
2374
2375                 LASSERT(*vallen == sizeof(struct obd_id_info));
2376                 tgt = lov->lov_tgts[info->idx];
2377
2378                 if (!tgt || !tgt->ltd_active)
2379                         GOTO(out, rc = -ESRCH);
2380
2381                 rc = obd_get_info(tgt->ltd_exp, keylen, key, &size, info->data);
2382                 GOTO(out, rc = 0);
2383         } else if (KEY_IS(KEY_LOVDESC)) {
2384                 struct lov_desc *desc_ret = val;
2385                 *desc_ret = lov->desc;
2386
2387                 GOTO(out, rc = 0);
2388         } else if (KEY_IS(KEY_LOV_IDX)) {
2389                 struct lov_tgt_desc *tgt;
2390
2391                 for(i = 0; i < lov->desc.ld_tgt_count; i++) {
2392                         tgt = lov->lov_tgts[i];
2393                         if (obd_uuid_equals(val, &tgt->ltd_uuid))
2394                                 GOTO(out, rc = i);
2395                 }
2396         }
2397
2398         rc = -EINVAL;
2399 out:
2400         lov_putref(obddev);
2401         RETURN(rc);
2402 }
2403
2404 static int lov_set_info_async(struct obd_export *exp, obd_count keylen,
2405                               void *key, obd_count vallen, void *val,
2406                               struct ptlrpc_request_set *set)
2407 {
2408         struct obd_device *obddev = class_exp2obd(exp);
2409         struct lov_obd *lov = &obddev->u.lov;
2410         obd_count count;
2411         int i, rc = 0, err;
2412         struct lov_tgt_desc *tgt;
2413         unsigned incr, check_uuid,
2414                  do_inactive, no_set;
2415         unsigned next_id = 0,  mds_con = 0;
2416         ENTRY;
2417
2418         incr = check_uuid = do_inactive = no_set = 0;
2419         if (set == NULL) {
2420                 no_set = 1;
2421                 set = ptlrpc_prep_set();
2422                 if (!set)
2423                         RETURN(-ENOMEM);
2424         }
2425
2426         lov_getref(obddev);
2427         count = lov->desc.ld_tgt_count;
2428
2429         if (KEY_IS(KEY_NEXT_ID)) {
2430                 count = vallen / sizeof(struct obd_id_info);
2431                 vallen = sizeof(obd_id);
2432                 incr = sizeof(struct obd_id_info);
2433                 do_inactive = 1;
2434                 next_id = 1;
2435         } else if (KEY_IS("checksum")) {
2436                 do_inactive = 1;
2437         } else if (KEY_IS("unlinked")) {
2438                 check_uuid = val ? 1 : 0;
2439         } else if (KEY_IS("evict_by_nid")) {
2440                 /* use defaults:  do_inactive = incr = 0; */
2441         } else if (KEY_IS(KEY_MDS_CONN)) {
2442                 mds_con = 1;
2443         }
2444
2445         for (i = 0; i < count; i++, val = (char *)val + incr) {
2446                 if (next_id) {
2447                         tgt = lov->lov_tgts[((struct obd_id_info*)val)->idx];
2448                 } else {
2449                         tgt = lov->lov_tgts[i];
2450                 }
2451                 /* OST was disconnected */
2452                 if (!tgt || !tgt->ltd_exp)
2453                         continue;
2454
2455                 /* OST is inactive and we don't want inactive OSCs */
2456                 if (!tgt->ltd_active && !do_inactive)
2457                         continue;
2458
2459                 if (mds_con) {
2460                         struct mds_group_info *mgi;
2461
2462                         LASSERT(vallen == sizeof(*mgi));
2463                         mgi = (struct mds_group_info *)val;
2464
2465                         /* Only want a specific OSC */
2466                         if (mgi->uuid && !obd_uuid_equals(mgi->uuid,
2467                                                 &tgt->ltd_uuid))
2468                                 continue;
2469
2470                         err = obd_set_info_async(tgt->ltd_exp,
2471                                          keylen, key, sizeof(int),
2472                                          &mgi->group, set);
2473                 } else if (next_id) {
2474                         err = obd_set_info_async(tgt->ltd_exp,
2475                                          keylen, key, vallen,
2476                                          ((struct obd_id_info*)val)->data, set);
2477                 } else  {
2478                         /* Only want a specific OSC */
2479                         if (check_uuid &&
2480                             !obd_uuid_equals(val, &tgt->ltd_uuid))
2481                                 continue;
2482
2483                         err = obd_set_info_async(tgt->ltd_exp,
2484                                          keylen, key, vallen, val, set);
2485                 }
2486
2487                 if (!rc)
2488                         rc = err;
2489         }
2490
2491         lov_putref(obddev);
2492         if (no_set) {
2493                 err = ptlrpc_set_wait(set);
2494                 if (!rc)
2495                         rc = err;
2496                 ptlrpc_set_destroy(set);
2497         }
2498         RETURN(rc);
2499 }
2500
2501 static int lov_checkmd(struct obd_export *exp, struct obd_export *md_exp,
2502                        struct lov_stripe_md *lsm)
2503 {
2504         int rc;
2505         ENTRY;
2506
2507         if (!lsm)
2508                 RETURN(0);
2509         LASSERT(md_exp);
2510         LASSERT(lsm_op_find(lsm->lsm_magic) != NULL);
2511         rc = lsm_op_find(lsm->lsm_magic)->lsm_revalidate(lsm, md_exp->exp_obd);
2512
2513         RETURN(rc);
2514 }
2515
2516 int lov_test_and_clear_async_rc(struct lov_stripe_md *lsm)
2517 {
2518         int i, rc = 0;
2519         ENTRY;
2520
2521         for (i = 0; i < lsm->lsm_stripe_count; i++) {
2522                 struct lov_oinfo *loi = lsm->lsm_oinfo[i];
2523                 if (loi->loi_ar.ar_rc && !rc)
2524                         rc = loi->loi_ar.ar_rc;
2525                 loi->loi_ar.ar_rc = 0;
2526         }
2527         RETURN(rc);
2528 }
2529 EXPORT_SYMBOL(lov_test_and_clear_async_rc);
2530
2531
2532 static int lov_extent_calc(struct obd_export *exp, struct lov_stripe_md *lsm,
2533                            int cmd, __u64 *offset)
2534 {
2535         __u32 ssize = lsm->lsm_stripe_size;
2536         __u64 start;
2537
2538         start = *offset;
2539         do_div(start, ssize);
2540         start = start * ssize;
2541
2542         CDEBUG(D_DLMTRACE, "offset "LPU64", stripe %u, start "LPU64
2543                            ", end "LPU64"\n", *offset, ssize, start,
2544                            start + ssize - 1);
2545         if (cmd == OBD_CALC_STRIPE_END) {
2546                 *offset = start + ssize - 1;
2547         } else if (cmd == OBD_CALC_STRIPE_START) {
2548                 *offset = start;
2549         } else {
2550                 LBUG();
2551         }
2552
2553         RETURN(0);
2554 }
2555
2556
2557 #if 0
2558 struct lov_multi_wait {
2559         struct ldlm_lock *lock;
2560         wait_queue_t      wait;
2561         int               completed;
2562         int               generation;
2563 };
2564
2565 int lov_complete_many(struct obd_export *exp, struct lov_stripe_md *lsm,
2566                       struct lustre_handle *lockh)
2567 {
2568         struct lov_lock_handles *lov_lockh = NULL;
2569         struct lustre_handle *lov_lockhp;
2570         struct lov_obd *lov;
2571         struct lov_oinfo *loi;
2572         struct lov_multi_wait *queues;
2573         int rc = 0, i;
2574         ENTRY;
2575
2576         ASSERT_LSM_MAGIC(lsm);
2577
2578         if (!exp || !exp->exp_obd)
2579                 RETURN(-ENODEV);
2580
2581         LASSERT(lockh != NULL);
2582         if (lsm->lsm_stripe_count > 1) {
2583                 lov_lockh = lov_handle2llh(lockh);
2584                 if (lov_lockh == NULL) {
2585                         CERROR("LOV: invalid lov lock handle %p\n", lockh);
2586                         RETURN(-EINVAL);
2587                 }
2588
2589                 lov_lockhp = lov_lockh->llh_handles;
2590         } else {
2591                 lov_lockhp = lockh;
2592         }
2593
2594         OBD_ALLOC(queues, lsm->lsm_stripe_count * sizeof(*queues));
2595         if (queues == NULL)
2596                 GOTO(out, rc = -ENOMEM);
2597
2598         lov = &exp->exp_obd->u.lov;
2599         for (i = 0, loi = lsm->lsm_oinfo; i < lsm->lsm_stripe_count;
2600              i++, loi++, lov_lockhp++) {
2601                 struct ldlm_lock *lock;
2602                 struct obd_device *obd;
2603
2604                 lock = ldlm_handle2lock(lov_lockhp);
2605                 if (lock == NULL) {
2606                         CDEBUG(D_HA, "lov idx %d subobj "LPX64" no lock?\n",
2607                                loi->loi_ost_idx, loi->loi_id);
2608                         queues[i].completed = 1;
2609                         continue;
2610                 }
2611
2612                 queues[i].lock = lock;
2613                 init_waitqueue_entry(&(queues[i].wait), current);
2614                 add_wait_queue(lock->l_waitq, &(queues[i].wait));
2615
2616                 obd = class_exp2obd(lock->l_conn_export);
2617                 if (obd != NULL)
2618                         imp = obd->u.cli.cl_import;
2619                 if (imp != NULL) {
2620                         spin_lock(&imp->imp_lock);
2621                         queues[i].generation = imp->imp_generation;
2622                         spin_unlock(&imp->imp_lock);
2623                 }
2624         }
2625
2626         lwi = LWI_TIMEOUT_INTR(obd_timeout * HZ, ldlm_expired_completion_wait,
2627                                interrupted_completion_wait, &lwd);
2628         rc = l_wait_event_added(check_multi_complete(queues, lsm), &lwi);
2629
2630         for (i = 0; i < lsm->lsm_stripe_count; i++)
2631                 remove_wait_queue(lock->l_waitq, &(queues[i].wait));
2632
2633         if (rc == -EINTR || rc == -ETIMEDOUT) {
2634
2635
2636         }
2637
2638  out:
2639         if (lov_lockh != NULL)
2640                 lov_llh_put(lov_lockh);
2641         RETURN(rc);
2642 }
2643 #endif
2644
2645 void lov_stripe_lock(struct lov_stripe_md *md)
2646 {
2647         LASSERT(md->lsm_lock_owner != cfs_current());
2648         spin_lock(&md->lsm_lock);
2649         LASSERT(md->lsm_lock_owner == NULL);
2650         md->lsm_lock_owner = cfs_current();
2651 }
2652 EXPORT_SYMBOL(lov_stripe_lock);
2653
2654 void lov_stripe_unlock(struct lov_stripe_md *md)
2655 {
2656         LASSERT(md->lsm_lock_owner == cfs_current());
2657         md->lsm_lock_owner = NULL;
2658         spin_unlock(&md->lsm_lock);
2659 }
2660 EXPORT_SYMBOL(lov_stripe_unlock);
2661
2662 struct obd_ops lov_obd_ops = {
2663         .o_owner               = THIS_MODULE,
2664         .o_setup               = lov_setup,
2665         .o_precleanup          = lov_precleanup,
2666         .o_cleanup             = lov_cleanup,
2667         .o_process_config      = lov_process_config,
2668         .o_connect             = lov_connect,
2669         .o_disconnect          = lov_disconnect,
2670         .o_statfs              = lov_statfs,
2671         .o_statfs_async        = lov_statfs_async,
2672         .o_packmd              = lov_packmd,
2673         .o_unpackmd            = lov_unpackmd,
2674         .o_checkmd             = lov_checkmd,
2675         .o_create              = lov_create,
2676         .o_destroy             = lov_destroy,
2677         .o_getattr             = lov_getattr,
2678         .o_getattr_async       = lov_getattr_async,
2679         .o_setattr             = lov_setattr,
2680         .o_setattr_async       = lov_setattr_async,
2681         .o_brw                 = lov_brw,
2682         .o_brw_async           = lov_brw_async,
2683         .o_prep_async_page     = lov_prep_async_page,
2684         .o_queue_async_io      = lov_queue_async_io,
2685         .o_set_async_flags     = lov_set_async_flags,
2686         .o_queue_group_io      = lov_queue_group_io,
2687         .o_trigger_group_io    = lov_trigger_group_io,
2688         .o_teardown_async_page = lov_teardown_async_page,
2689         .o_merge_lvb           = lov_merge_lvb,
2690         .o_adjust_kms          = lov_adjust_kms,
2691         .o_punch               = lov_punch,
2692         .o_sync                = lov_sync,
2693         .o_enqueue             = lov_enqueue,
2694         .o_match               = lov_match,
2695         .o_change_cbdata       = lov_change_cbdata,
2696         .o_cancel              = lov_cancel,
2697         .o_cancel_unused       = lov_cancel_unused,
2698         .o_join_lru            = lov_join_lru,
2699         .o_iocontrol           = lov_iocontrol,
2700         .o_get_info            = lov_get_info,
2701         .o_set_info_async      = lov_set_info_async,
2702         .o_extent_calc         = lov_extent_calc,
2703         .o_llog_init           = lov_llog_init,
2704         .o_llog_finish         = lov_llog_finish,
2705         .o_notify              = lov_notify,
2706 };
2707
2708 static quota_interface_t *quota_interface;
2709 extern quota_interface_t lov_quota_interface;
2710
2711 cfs_mem_cache_t *lov_oinfo_slab;
2712
2713 int __init lov_init(void)
2714 {
2715         struct lprocfs_static_vars lvars;
2716         int rc, rc2;
2717         ENTRY;
2718
2719         lov_oinfo_slab = cfs_mem_cache_create("lov_oinfo",
2720                                               sizeof(struct lov_oinfo),
2721                                               0, SLAB_HWCACHE_ALIGN);
2722         if (lov_oinfo_slab == NULL)
2723                 return -ENOMEM;
2724         lprocfs_init_vars(lov, &lvars);
2725
2726         request_module("lquota");
2727         quota_interface = PORTAL_SYMBOL_GET(lov_quota_interface);
2728         init_obd_quota_ops(quota_interface, &lov_obd_ops);
2729
2730         rc = class_register_type(&lov_obd_ops, NULL, lvars.module_vars,
2731                                  LUSTRE_LOV_NAME, NULL);
2732         if (rc) {
2733                 if (quota_interface)
2734                         PORTAL_SYMBOL_PUT(lov_quota_interface);
2735                 rc2 = cfs_mem_cache_destroy(lov_oinfo_slab);
2736                 LASSERT(rc2 == 0);
2737         }
2738
2739         RETURN(rc);
2740 }
2741
2742 #ifdef __KERNEL__
2743 static void /*__exit*/ lov_exit(void)
2744 {
2745         int rc;
2746
2747         if (quota_interface)
2748                 PORTAL_SYMBOL_PUT(lov_quota_interface);
2749
2750         class_unregister_type(LUSTRE_LOV_NAME);
2751         rc = cfs_mem_cache_destroy(lov_oinfo_slab);
2752         LASSERT(rc == 0);
2753 }
2754
2755 MODULE_AUTHOR("Cluster File Systems, Inc. <info@clusterfs.com>");
2756 MODULE_DESCRIPTION("Lustre Logical Object Volume OBD driver");
2757 MODULE_LICENSE("GPL");
2758
2759 cfs_module(lov, LUSTRE_VERSION_STRING, lov_init, lov_exit);
2760 #endif