lustre/lov/lov_obd.c

   1 /*
   2  * GPL HEADER START
   3  *
   4  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License version 2 only,
   8  * as published by the Free Software Foundation.
   9  *
  10  * This program is distributed in the hope that it will be useful, but
  11  * WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13  * General Public License version 2 for more details (a copy is included
  14  * in the LICENSE file that accompanied this code).
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * version 2 along with this program; If not, see
  18  * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
  19  *
  20  * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
  21  * CA 95054 USA or visit www.sun.com if you need additional information or
  22  * have any questions.
  23  *
  24  * GPL HEADER END
  25  */
  26 /*
  27  * Copyright (c) 2002, 2010, Oracle and/or its affiliates. All rights reserved.
  28  * Use is subject to license terms.
  29  *
  30  * Copyright (c) 2011, 2012, Intel Corporation.
  31  */
  32 /*
  33  * This file is part of Lustre, http://www.lustre.org/
  34  * Lustre is a trademark of Sun Microsystems, Inc.
  35  *
  36  * lustre/lov/lov_obd.c
  37  *
  38  * Author: Phil Schwan <phil@clusterfs.com>
  39  * Author: Peter Braam <braam@clusterfs.com>
  40  * Author: Mike Shaver <shaver@clusterfs.com>
  41  * Author: Nathan Rutman <nathan@clusterfs.com>
  42  */
  43
  44 #define DEBUG_SUBSYSTEM S_LOV
  45 #ifdef __KERNEL__
  46 #include <libcfs/libcfs.h>
  47 #else
  48 #include <liblustre.h>
  49 #endif
  50
  51 #include <obd_support.h>
  52 #include <lustre_lib.h>
  53 #include <lustre_net.h>
  54 #include <lustre/lustre_idl.h>
  55 #include <lustre_dlm.h>
  56 #include <lustre_mds.h>
  57 #include <lustre_debug.h>
  58 #include <obd_class.h>
  59 #include <obd_lov.h>
  60 #include <obd_ost.h>
  61 #include <lprocfs_status.h>
  62 #include <lustre_param.h>
  63 #include <cl_object.h>
  64 #include <lclient.h> /* for cl_client_lru */
  65 #include <lustre/ll_fiemap.h>
  66 #include <lustre_log.h>
  67 #include <lustre_fid.h>
  68
  69 #include "lov_internal.h"
  70
  71 /* Keep a refcount of lov->tgt usage to prevent racing with addition/deletion.
  72    Any function that expects lov_tgts to remain stationary must take a ref. */
  73 static void lov_getref(struct obd_device *obd)
  74 {
  75         struct lov_obd *lov = &obd->u.lov;
  76
  77         /* nobody gets through here until lov_putref is done */
  78         mutex_lock(&lov->lov_lock);
  79         cfs_atomic_inc(&lov->lov_refcount);
  80         mutex_unlock(&lov->lov_lock);
  81         return;
  82 }
  83
  84 static void __lov_del_obd(struct obd_device *obd, struct lov_tgt_desc *tgt);
  85
  86 static void lov_putref(struct obd_device *obd)
  87 {
  88         struct lov_obd *lov = &obd->u.lov;
  89
  90         mutex_lock(&lov->lov_lock);
  91         /* ok to dec to 0 more than once -- ltd_exp's will be null */
  92         if (cfs_atomic_dec_and_test(&lov->lov_refcount) && lov->lov_death_row) {
  93                 CFS_LIST_HEAD(kill);
  94                 int i;
  95                 struct lov_tgt_desc *tgt, *n;
  96                 CDEBUG(D_CONFIG, "destroying %d lov targets\n",
  97                        lov->lov_death_row);
  98                 for (i = 0; i < lov->desc.ld_tgt_count; i++) {
  99                         tgt = lov->lov_tgts[i];
 100
 101                         if (!tgt || !tgt->ltd_reap)
 102                                 continue;
 103                         cfs_list_add(&tgt->ltd_kill, &kill);
 104                         /* XXX - right now there is a dependency on ld_tgt_count
 105                          * being the maximum tgt index for computing the
 106                          * mds_max_easize. So we can't shrink it. */
 107                         lov_ost_pool_remove(&lov->lov_packed, i);
 108                         lov->lov_tgts[i] = NULL;
 109                         lov->lov_death_row--;
 110                 }
 111                 mutex_unlock(&lov->lov_lock);
 112
 113                 cfs_list_for_each_entry_safe(tgt, n, &kill, ltd_kill) {
 114                         cfs_list_del(&tgt->ltd_kill);
 115                         /* Disconnect */
 116                         __lov_del_obd(obd, tgt);
 117                 }
 118         } else {
 119                 mutex_unlock(&lov->lov_lock);
 120         }
 121 }
 122
 123 static int lov_set_osc_active(struct obd_device *obd, struct obd_uuid *uuid,
 124                               enum obd_notify_event ev);
 125 static int lov_notify(struct obd_device *obd, struct obd_device *watched,
 126                       enum obd_notify_event ev, void *data);
 127
 128
 129 #define MAX_STRING_SIZE 128
 130 int lov_connect_obd(struct obd_device *obd, __u32 index, int activate,
 131                     struct obd_connect_data *data)
 132 {
 133         struct lov_obd *lov = &obd->u.lov;
 134         struct obd_uuid *tgt_uuid;
 135         struct obd_device *tgt_obd;
 136         static struct obd_uuid lov_osc_uuid = { "LOV_OSC_UUID" };
 137         struct obd_import *imp;
 138 #ifdef __KERNEL__
 139         cfs_proc_dir_entry_t *lov_proc_dir;
 140 #endif
 141         int rc;
 142         ENTRY;
 143
 144         if (!lov->lov_tgts[index])
 145                 RETURN(-EINVAL);
 146
 147         tgt_uuid = &lov->lov_tgts[index]->ltd_uuid;
 148         tgt_obd = lov->lov_tgts[index]->ltd_obd;
 149
 150         if (!tgt_obd->obd_set_up) {
 151                 CERROR("Target %s not set up\n", obd_uuid2str(tgt_uuid));
 152                 RETURN(-EINVAL);
 153         }
 154
 155         /* override the sp_me from lov */
 156         tgt_obd->u.cli.cl_sp_me = lov->lov_sp_me;
 157
 158         if (data && (data->ocd_connect_flags & OBD_CONNECT_INDEX))
 159                 data->ocd_index = index;
 160
 161         /*
 162          * Divine LOV knows that OBDs under it are OSCs.
 163          */
 164         imp = tgt_obd->u.cli.cl_import;
 165
 166         if (activate) {
 167                 tgt_obd->obd_no_recov = 0;
 168                 /* FIXME this is probably supposed to be
 169                    ptlrpc_set_import_active.  Horrible naming. */
 170                 ptlrpc_activate_import(imp);
 171         }
 172
 173         rc = obd_register_observer(tgt_obd, obd);
 174         if (rc) {
 175                 CERROR("Target %s register_observer error %d\n",
 176                        obd_uuid2str(tgt_uuid), rc);
 177                 RETURN(rc);
 178         }
 179
 180
 181         if (imp->imp_invalid) {
 182                 CDEBUG(D_CONFIG, "not connecting OSC %s; administratively "
 183                        "disabled\n", obd_uuid2str(tgt_uuid));
 184                 RETURN(0);
 185         }
 186
 187         rc = obd_connect(NULL, &lov->lov_tgts[index]->ltd_exp, tgt_obd,
 188                          &lov_osc_uuid, data, NULL);
 189         if (rc || !lov->lov_tgts[index]->ltd_exp) {
 190                 CERROR("Target %s connect error %d\n",
 191                        obd_uuid2str(tgt_uuid), rc);
 192                 RETURN(-ENODEV);
 193         }
 194
 195         lov->lov_tgts[index]->ltd_reap = 0;
 196
 197         CDEBUG(D_CONFIG, "Connected tgt idx %d %s (%s) %sactive\n", index,
 198                obd_uuid2str(tgt_uuid), tgt_obd->obd_name, activate ? "":"in");
 199
 200 #ifdef __KERNEL__
 201         lov_proc_dir = lprocfs_srch(obd->obd_proc_entry, "target_obds");
 202         if (lov_proc_dir) {
 203                 struct obd_device *osc_obd = lov->lov_tgts[index]->ltd_exp->exp_obd;
 204                 cfs_proc_dir_entry_t *osc_symlink;
 205
 206                 LASSERT(osc_obd != NULL);
 207                 LASSERT(osc_obd->obd_magic == OBD_DEVICE_MAGIC);
 208                 LASSERT(osc_obd->obd_type->typ_name != NULL);
 209
 210                 osc_symlink = lprocfs_add_symlink(osc_obd->obd_name,
 211                                                   lov_proc_dir,
 212                                                   "../../../%s/%s",
 213                                                   osc_obd->obd_type->typ_name,
 214                                                   osc_obd->obd_name);
 215                 if (osc_symlink == NULL) {
 216                         CERROR("could not register LOV target "
 217                                 "/proc/fs/lustre/%s/%s/target_obds/%s.",
 218                                 obd->obd_type->typ_name, obd->obd_name,
 219                                 osc_obd->obd_name);
 220                         lprocfs_remove(&lov_proc_dir);
 221                 }
 222         }
 223 #endif
 224
 225         RETURN(0);
 226 }
 227
 228 static int lov_connect(const struct lu_env *env,
 229                        struct obd_export **exp, struct obd_device *obd,
 230                        struct obd_uuid *cluuid, struct obd_connect_data *data,
 231                        void *localdata)
 232 {
 233         struct lov_obd *lov = &obd->u.lov;
 234         struct lov_tgt_desc *tgt;
 235         struct lustre_handle conn;
 236         int i, rc;
 237         ENTRY;
 238
 239         CDEBUG(D_CONFIG, "connect #%d\n", lov->lov_connects);
 240
 241         rc = class_connect(&conn, obd, cluuid);
 242         if (rc)
 243                 RETURN(rc);
 244
 245         *exp = class_conn2export(&conn);
 246
 247         /* Why should there ever be more than 1 connect? */
 248         lov->lov_connects++;
 249         LASSERT(lov->lov_connects == 1);
 250
 251         memset(&lov->lov_ocd, 0, sizeof(lov->lov_ocd));
 252         if (data)
 253                 lov->lov_ocd = *data;
 254
 255         obd_getref(obd);
 256         for (i = 0; i < lov->desc.ld_tgt_count; i++) {
 257                 tgt = lov->lov_tgts[i];
 258                 if (!tgt || obd_uuid_empty(&tgt->ltd_uuid))
 259                         continue;
 260                 /* Flags will be lowest common denominator */
 261                 rc = lov_connect_obd(obd, i, tgt->ltd_activate, &lov->lov_ocd);
 262                 if (rc) {
 263                         CERROR("%s: lov connect tgt %d failed: %d\n",
 264                                obd->obd_name, i, rc);
 265                         continue;
 266                 }
 267                 /* connect to administrative disabled ost */
 268                 if (!lov->lov_tgts[i]->ltd_exp)
 269                         continue;
 270
 271                 rc = lov_notify(obd, lov->lov_tgts[i]->ltd_exp->exp_obd,
 272                                 OBD_NOTIFY_CONNECT, (void *)&i);
 273                 if (rc) {
 274                         CERROR("%s error sending notify %d\n",
 275                                obd->obd_name, rc);
 276                 }
 277         }
 278         obd_putref(obd);
 279
 280         RETURN(0);
 281 }
 282
 283 static int lov_disconnect_obd(struct obd_device *obd, struct lov_tgt_desc *tgt)
 284 {
 285         cfs_proc_dir_entry_t *lov_proc_dir;
 286         struct lov_obd *lov = &obd->u.lov;
 287         struct obd_device *osc_obd;
 288         int rc;
 289         ENTRY;
 290
 291         osc_obd = class_exp2obd(tgt->ltd_exp);
 292         CDEBUG(D_CONFIG, "%s: disconnecting target %s\n",
 293                obd->obd_name, osc_obd->obd_name);
 294
 295         if (tgt->ltd_active) {
 296                 tgt->ltd_active = 0;
 297                 lov->desc.ld_active_tgt_count--;
 298                 tgt->ltd_exp->exp_obd->obd_inactive = 1;
 299         }
 300
 301         lov_proc_dir = lprocfs_srch(obd->obd_proc_entry, "target_obds");
 302         if (lov_proc_dir) {
 303                 cfs_proc_dir_entry_t *osc_symlink;
 304
 305                 osc_symlink = lprocfs_srch(lov_proc_dir, osc_obd->obd_name);
 306                 if (osc_symlink) {
 307                         lprocfs_remove(&osc_symlink);
 308                 } else {
 309                         CERROR("/proc/fs/lustre/%s/%s/target_obds/%s missing.",
 310                                obd->obd_type->typ_name, obd->obd_name,
 311                                osc_obd->obd_name);
 312                 }
 313         }
 314
 315         if (osc_obd) {
 316                 /* Pass it on to our clients.
 317                  * XXX This should be an argument to disconnect,
 318                  * XXX not a back-door flag on the OBD.  Ah well.
 319                  */
 320                 osc_obd->obd_force = obd->obd_force;
 321                 osc_obd->obd_fail = obd->obd_fail;
 322                 osc_obd->obd_no_recov = obd->obd_no_recov;
 323         }
 324
 325         obd_register_observer(osc_obd, NULL);
 326
 327         rc = obd_disconnect(tgt->ltd_exp);
 328         if (rc) {
 329                 CERROR("Target %s disconnect error %d\n",
 330                        tgt->ltd_uuid.uuid, rc);
 331                 rc = 0;
 332         }
 333
 334         tgt->ltd_exp = NULL;
 335         RETURN(0);
 336 }
 337
 338 static int lov_disconnect(struct obd_export *exp)
 339 {
 340         struct obd_device *obd = class_exp2obd(exp);
 341         struct lov_obd *lov = &obd->u.lov;
 342         int i, rc;
 343         ENTRY;
 344
 345         if (!lov->lov_tgts)
 346                 goto out;
 347
 348         /* Only disconnect the underlying layers on the final disconnect. */
 349         lov->lov_connects--;
 350         if (lov->lov_connects != 0) {
 351                 /* why should there be more than 1 connect? */
 352                 CERROR("disconnect #%d\n", lov->lov_connects);
 353                 goto out;
 354         }
 355
 356         /* Let's hold another reference so lov_del_obd doesn't spin through
 357            putref every time */
 358         obd_getref(obd);
 359
 360         for (i = 0; i < lov->desc.ld_tgt_count; i++) {
 361                 if (lov->lov_tgts[i] && lov->lov_tgts[i]->ltd_exp) {
 362                         /* Disconnection is the last we know about an obd */
 363                         lov_del_target(obd, i, 0, lov->lov_tgts[i]->ltd_gen);
 364                 }
 365         }
 366         obd_putref(obd);
 367
 368 out:
 369         rc = class_disconnect(exp); /* bz 9811 */
 370         RETURN(rc);
 371 }
 372
 373 /* Error codes:
 374  *
 375  *  -EINVAL  : UUID can't be found in the LOV's target list
 376  *  -ENOTCONN: The UUID is found, but the target connection is bad (!)
 377  *  -EBADF   : The UUID is found, but the OBD is the wrong type (!)
 378  *  any >= 0 : is log target index
 379  */
 380 static int lov_set_osc_active(struct obd_device *obd, struct obd_uuid *uuid,
 381                               enum obd_notify_event ev)
 382 {
 383         struct lov_obd *lov = &obd->u.lov;
 384         struct lov_tgt_desc *tgt;
 385         int index, activate, active;
 386         ENTRY;
 387
 388         CDEBUG(D_INFO, "Searching in lov %p for uuid %s event(%d)\n",
 389                lov, uuid->uuid, ev);
 390
 391         obd_getref(obd);
 392         for (index = 0; index < lov->desc.ld_tgt_count; index++) {
 393                 tgt = lov->lov_tgts[index];
 394                 if (!tgt)
 395                         continue;
 396                 /*
 397                  * LU-642, initially inactive OSC could miss the obd_connect,
 398                  * we make up for it here.
 399                  */
 400                 if (ev == OBD_NOTIFY_ACTIVATE && tgt->ltd_exp == NULL &&
 401                     obd_uuid_equals(uuid, &tgt->ltd_uuid)) {
 402                         struct obd_uuid lov_osc_uuid = {"LOV_OSC_UUID"};
 403
 404                         obd_connect(NULL, &tgt->ltd_exp, tgt->ltd_obd,
 405                                     &lov_osc_uuid, &lov->lov_ocd, NULL);
 406                 }
 407                 if (!tgt->ltd_exp)
 408                         continue;
 409
 410                 CDEBUG(D_INFO, "lov idx %d is %s conn "LPX64"\n",
 411                        index, obd_uuid2str(&tgt->ltd_uuid),
 412                        tgt->ltd_exp->exp_handle.h_cookie);
 413                 if (obd_uuid_equals(uuid, &tgt->ltd_uuid))
 414                         break;
 415         }
 416
 417         if (index == lov->desc.ld_tgt_count)
 418                 GOTO(out, index = -EINVAL);
 419
 420         if (ev == OBD_NOTIFY_DEACTIVATE || ev == OBD_NOTIFY_ACTIVATE) {
 421                 activate = (ev == OBD_NOTIFY_ACTIVATE) ? 1 : 0;
 422
 423                 if (lov->lov_tgts[index]->ltd_activate == activate) {
 424                         CDEBUG(D_INFO, "OSC %s already %sactivate!\n",
 425                                uuid->uuid, activate ? "" : "de");
 426                 } else {
 427                         lov->lov_tgts[index]->ltd_activate = activate;
 428                         CDEBUG(D_CONFIG, "%sactivate OSC %s\n",
 429                                activate ? "" : "de", obd_uuid2str(uuid));
 430                 }
 431
 432         } else if (ev == OBD_NOTIFY_INACTIVE || ev == OBD_NOTIFY_ACTIVE) {
 433                 active = (ev == OBD_NOTIFY_ACTIVE) ? 1 : 0;
 434
 435                 if (lov->lov_tgts[index]->ltd_active == active) {
 436                         CDEBUG(D_INFO, "OSC %s already %sactive!\n",
 437                                uuid->uuid, active ? "" : "in");
 438                         GOTO(out, index);
 439                 } else {
 440                         CDEBUG(D_CONFIG, "Marking OSC %s %sactive\n",
 441                                obd_uuid2str(uuid), active ? "" : "in");
 442                 }
 443
 444                 lov->lov_tgts[index]->ltd_active = active;
 445                 if (active) {
 446                         lov->desc.ld_active_tgt_count++;
 447                         lov->lov_tgts[index]->ltd_exp->exp_obd->obd_inactive = 0;
 448                 } else {
 449                         lov->desc.ld_active_tgt_count--;
 450                         lov->lov_tgts[index]->ltd_exp->exp_obd->obd_inactive = 1;
 451                 }
 452         } else {
 453                 CERROR("Unknown event(%d) for uuid %s", ev, uuid->uuid);
 454         }
 455
 456  out:
 457         obd_putref(obd);
 458         RETURN(index);
 459 }
 460
 461 static int lov_notify(struct obd_device *obd, struct obd_device *watched,
 462                       enum obd_notify_event ev, void *data)
 463 {
 464         int rc = 0;
 465         struct lov_obd *lov = &obd->u.lov;
 466         ENTRY;
 467
 468         down_read(&lov->lov_notify_lock);
 469         if (!lov->lov_connects) {
 470                 up_read(&lov->lov_notify_lock);
 471                 RETURN(rc);
 472         }
 473
 474         if (ev == OBD_NOTIFY_ACTIVE || ev == OBD_NOTIFY_INACTIVE ||
 475             ev == OBD_NOTIFY_ACTIVATE || ev == OBD_NOTIFY_DEACTIVATE) {
 476                 struct obd_uuid *uuid;
 477
 478                 LASSERT(watched);
 479
 480                 if (strcmp(watched->obd_type->typ_name, LUSTRE_OSC_NAME)) {
 481                         up_read(&lov->lov_notify_lock);
 482                         CERROR("unexpected notification of %s %s!\n",
 483                                watched->obd_type->typ_name,
 484                                watched->obd_name);
 485                         RETURN(-EINVAL);
 486                 }
 487                 uuid = &watched->u.cli.cl_target_uuid;
 488
 489                 /* Set OSC as active before notifying the observer, so the
 490                  * observer can use the OSC normally.
 491                  */
 492                 rc = lov_set_osc_active(obd, uuid, ev);
 493                 if (rc < 0) {
 494                         up_read(&lov->lov_notify_lock);
 495                         CERROR("event(%d) of %s failed: %d\n", ev,
 496                                obd_uuid2str(uuid), rc);
 497                         RETURN(rc);
 498                 }
 499                 /* active event should be pass lov target index as data */
 500                 data = &rc;
 501         }
 502
 503         /* Pass the notification up the chain. */
 504         if (watched) {
 505                 rc = obd_notify_observer(obd, watched, ev, data);
 506         } else {
 507                 /* NULL watched means all osc's in the lov (only for syncs) */
 508                 /* sync event should be send lov idx as data */
 509                 struct lov_obd *lov = &obd->u.lov;
 510                 int i, is_sync;
 511
 512                 data = &i;
 513                 is_sync = (ev == OBD_NOTIFY_SYNC) ||
 514                           (ev == OBD_NOTIFY_SYNC_NONBLOCK);
 515
 516                 obd_getref(obd);
 517                 for (i = 0; i < lov->desc.ld_tgt_count; i++) {
 518                         if (!lov->lov_tgts[i])
 519                                 continue;
 520
 521                         /* don't send sync event if target not
 522                          * connected/activated */
 523                         if (is_sync &&  !lov->lov_tgts[i]->ltd_active)
 524                                 continue;
 525
 526                         rc = obd_notify_observer(obd, lov->lov_tgts[i]->ltd_obd,
 527                                                  ev, data);
 528                         if (rc) {
 529                                 CERROR("%s: notify %s of %s failed %d\n",
 530                                        obd->obd_name,
 531                                        obd->obd_observer->obd_name,
 532                                        lov->lov_tgts[i]->ltd_obd->obd_name,
 533                                        rc);
 534                         }
 535                 }
 536                 obd_putref(obd);
 537         }
 538
 539         up_read(&lov->lov_notify_lock);
 540         RETURN(rc);
 541 }
 542
 543 static int lov_add_target(struct obd_device *obd, struct obd_uuid *uuidp,
 544                           __u32 index, int gen, int active)
 545 {
 546         struct lov_obd *lov = &obd->u.lov;
 547         struct lov_tgt_desc *tgt;
 548         struct obd_device *tgt_obd;
 549         int rc;
 550         ENTRY;
 551
 552         CDEBUG(D_CONFIG, "uuid:%s idx:%d gen:%d active:%d\n",
 553                uuidp->uuid, index, gen, active);
 554
 555         if (gen <= 0) {
 556                 CERROR("request to add OBD %s with invalid generation: %d\n",
 557                        uuidp->uuid, gen);
 558                 RETURN(-EINVAL);
 559         }
 560
 561         tgt_obd = class_find_client_obd(uuidp, LUSTRE_OSC_NAME,
 562                                         &obd->obd_uuid);
 563         if (tgt_obd == NULL)
 564                 RETURN(-EINVAL);
 565
 566         mutex_lock(&lov->lov_lock);
 567
 568         if ((index < lov->lov_tgt_size) && (lov->lov_tgts[index] != NULL)) {
 569                 tgt = lov->lov_tgts[index];
 570                 CERROR("UUID %s already assigned at LOV target index %d\n",
 571                        obd_uuid2str(&tgt->ltd_uuid), index);
 572                 mutex_unlock(&lov->lov_lock);
 573                 RETURN(-EEXIST);
 574         }
 575
 576         if (index >= lov->lov_tgt_size) {
 577                 /* We need to reallocate the lov target array. */
 578                 struct lov_tgt_desc **newtgts, **old = NULL;
 579                 __u32 newsize, oldsize = 0;
 580
 581                 newsize = max(lov->lov_tgt_size, (__u32)2);
 582                 while (newsize < index + 1)
 583                         newsize = newsize << 1;
 584                 OBD_ALLOC(newtgts, sizeof(*newtgts) * newsize);
 585                 if (newtgts == NULL) {
 586                         mutex_unlock(&lov->lov_lock);
 587                         RETURN(-ENOMEM);
 588                 }
 589
 590                 if (lov->lov_tgt_size) {
 591                         memcpy(newtgts, lov->lov_tgts, sizeof(*newtgts) *
 592                                lov->lov_tgt_size);
 593                         old = lov->lov_tgts;
 594                         oldsize = lov->lov_tgt_size;
 595                 }
 596
 597                 lov->lov_tgts = newtgts;
 598                 lov->lov_tgt_size = newsize;
 599                 smp_rmb();
 600                 if (old)
 601                         OBD_FREE(old, sizeof(*old) * oldsize);
 602
 603                 CDEBUG(D_CONFIG, "tgts: %p size: %d\n",
 604                        lov->lov_tgts, lov->lov_tgt_size);
 605         }
 606
 607         OBD_ALLOC_PTR(tgt);
 608         if (!tgt) {
 609                 mutex_unlock(&lov->lov_lock);
 610                 RETURN(-ENOMEM);
 611         }
 612
 613         rc = lov_ost_pool_add(&lov->lov_packed, index, lov->lov_tgt_size);
 614         if (rc) {
 615                 mutex_unlock(&lov->lov_lock);
 616                 OBD_FREE_PTR(tgt);
 617                 RETURN(rc);
 618         }
 619
 620         tgt->ltd_uuid = *uuidp;
 621         tgt->ltd_obd = tgt_obd;
 622         /* XXX - add a sanity check on the generation number. */
 623         tgt->ltd_gen = gen;
 624         tgt->ltd_index = index;
 625         tgt->ltd_activate = active;
 626         lov->lov_tgts[index] = tgt;
 627         if (index >= lov->desc.ld_tgt_count)
 628                 lov->desc.ld_tgt_count = index + 1;
 629
 630         mutex_unlock(&lov->lov_lock);
 631
 632         CDEBUG(D_CONFIG, "idx=%d ltd_gen=%d ld_tgt_count=%d\n",
 633                 index, tgt->ltd_gen, lov->desc.ld_tgt_count);
 634
 635         rc = obd_notify(obd, tgt_obd, OBD_NOTIFY_CREATE, &index);
 636
 637         if (lov->lov_connects == 0) {
 638                 /* lov_connect hasn't been called yet. We'll do the
 639                    lov_connect_obd on this target when that fn first runs,
 640                    because we don't know the connect flags yet. */
 641                 RETURN(0);
 642         }
 643
 644         obd_getref(obd);
 645
 646         rc = lov_connect_obd(obd, index, active, &lov->lov_ocd);
 647         if (rc)
 648                 GOTO(out, rc);
 649
 650         /* connect to administrative disabled ost */
 651         if (!tgt->ltd_exp)
 652                 GOTO(out, rc = 0);
 653
 654         if (lov->lov_cache != NULL) {
 655                 rc = obd_set_info_async(NULL, tgt->ltd_exp,
 656                                 sizeof(KEY_CACHE_SET), KEY_CACHE_SET,
 657                                 sizeof(struct cl_client_cache), lov->lov_cache,
 658                                 NULL);
 659                 if (rc < 0)
 660                         GOTO(out, rc);
 661         }
 662
 663         rc = lov_notify(obd, tgt->ltd_exp->exp_obd,
 664                         active ? OBD_NOTIFY_CONNECT : OBD_NOTIFY_INACTIVE,
 665                         (void *)&index);
 666
 667 out:
 668         if (rc) {
 669                 CERROR("add failed (%d), deleting %s\n", rc,
 670                        obd_uuid2str(&tgt->ltd_uuid));
 671                 lov_del_target(obd, index, 0, 0);
 672         }
 673         obd_putref(obd);
 674         RETURN(rc);
 675 }
 676
 677 /* Schedule a target for deletion */
 678 int lov_del_target(struct obd_device *obd, __u32 index,
 679                    struct obd_uuid *uuidp, int gen)
 680 {
 681         struct lov_obd *lov = &obd->u.lov;
 682         int count = lov->desc.ld_tgt_count;
 683         int rc = 0;
 684         ENTRY;
 685
 686         if (index >= count) {
 687                 CERROR("LOV target index %d >= number of LOV OBDs %d.\n",
 688                        index, count);
 689                 RETURN(-EINVAL);
 690         }
 691
 692         /* to make sure there's no ongoing lov_notify() now */
 693         down_write(&lov->lov_notify_lock);
 694         obd_getref(obd);
 695
 696         if (!lov->lov_tgts[index]) {
 697                 CERROR("LOV target at index %d is not setup.\n", index);
 698                 GOTO(out, rc = -EINVAL);
 699         }
 700
 701         if (uuidp && !obd_uuid_equals(uuidp, &lov->lov_tgts[index]->ltd_uuid)) {
 702                 CERROR("LOV target UUID %s at index %d doesn't match %s.\n",
 703                        lov_uuid2str(lov, index), index,
 704                        obd_uuid2str(uuidp));
 705                 GOTO(out, rc = -EINVAL);
 706         }
 707
 708         CDEBUG(D_CONFIG, "uuid: %s idx: %d gen: %d exp: %p active: %d\n",
 709                lov_uuid2str(lov, index), index,
 710                lov->lov_tgts[index]->ltd_gen, lov->lov_tgts[index]->ltd_exp,
 711                lov->lov_tgts[index]->ltd_active);
 712
 713         lov->lov_tgts[index]->ltd_reap = 1;
 714         lov->lov_death_row++;
 715         /* we really delete it from obd_putref */
 716 out:
 717         obd_putref(obd);
 718         up_write(&lov->lov_notify_lock);
 719
 720         RETURN(rc);
 721 }
 722
 723 static void __lov_del_obd(struct obd_device *obd, struct lov_tgt_desc *tgt)
 724 {
 725         struct obd_device *osc_obd;
 726
 727         LASSERT(tgt);
 728         LASSERT(tgt->ltd_reap);
 729
 730         osc_obd = class_exp2obd(tgt->ltd_exp);
 731
 732         CDEBUG(D_CONFIG, "Removing tgt %s : %s\n",
 733                tgt->ltd_uuid.uuid,
 734                osc_obd ? osc_obd->obd_name : "<no obd>");
 735
 736         if (tgt->ltd_exp)
 737                 lov_disconnect_obd(obd, tgt);
 738
 739         OBD_FREE_PTR(tgt);
 740
 741         /* Manual cleanup - no cleanup logs to clean up the osc's.  We must
 742            do it ourselves. And we can't do it from lov_cleanup,
 743            because we just lost our only reference to it. */
 744         if (osc_obd)
 745                 class_manual_cleanup(osc_obd);
 746 }
 747
 748 void lov_fix_desc_stripe_size(__u64 *val)
 749 {
 750         if (*val < LOV_DEFAULT_STRIPE_SIZE) {
 751                 LCONSOLE_WARN("Increasing default stripe size to min %u\n",
 752                               LOV_DEFAULT_STRIPE_SIZE);
 753                 *val = LOV_DEFAULT_STRIPE_SIZE;
 754         } else if (*val & (LOV_MIN_STRIPE_SIZE - 1)) {
 755                 *val &= ~(LOV_MIN_STRIPE_SIZE - 1);
 756                 LCONSOLE_WARN("Changing default stripe size to "LPU64" (a "
 757                               "multiple of %u)\n",
 758                               *val, LOV_MIN_STRIPE_SIZE);
 759         }
 760 }
 761
 762 void lov_fix_desc_stripe_count(__u32 *val)
 763 {
 764         if (*val == 0)
 765                 *val = 1;
 766 }
 767
 768 void lov_fix_desc_pattern(__u32 *val)
 769 {
 770         /* from lov_setstripe */
 771         if ((*val != 0) && (*val != LOV_PATTERN_RAID0)) {
 772                 LCONSOLE_WARN("Unknown stripe pattern: %#x\n", *val);
 773                 *val = 0;
 774         }
 775 }
 776
 777 void lov_fix_desc_qos_maxage(__u32 *val)
 778 {
 779         /* fix qos_maxage */
 780         if (*val == 0)
 781                 *val = QOS_DEFAULT_MAXAGE;
 782 }
 783
 784 void lov_fix_desc(struct lov_desc *desc)
 785 {
 786         lov_fix_desc_stripe_size(&desc->ld_default_stripe_size);
 787         lov_fix_desc_stripe_count(&desc->ld_default_stripe_count);
 788         lov_fix_desc_pattern(&desc->ld_pattern);
 789         lov_fix_desc_qos_maxage(&desc->ld_qos_maxage);
 790 }
 791
 792 int lov_setup(struct obd_device *obd, struct lustre_cfg *lcfg)
 793 {
 794         struct lprocfs_static_vars lvars = { 0 };
 795         struct lov_desc *desc;
 796         struct lov_obd *lov = &obd->u.lov;
 797         int rc;
 798         ENTRY;
 799
 800         if (LUSTRE_CFG_BUFLEN(lcfg, 1) < 1) {
 801                 CERROR("LOV setup requires a descriptor\n");
 802                 RETURN(-EINVAL);
 803         }
 804
 805         desc = (struct lov_desc *)lustre_cfg_buf(lcfg, 1);
 806
 807         if (sizeof(*desc) > LUSTRE_CFG_BUFLEN(lcfg, 1)) {
 808                 CERROR("descriptor size wrong: %d > %d\n",
 809                        (int)sizeof(*desc), LUSTRE_CFG_BUFLEN(lcfg, 1));
 810                 RETURN(-EINVAL);
 811         }
 812
 813         if (desc->ld_magic != LOV_DESC_MAGIC) {
 814                 if (desc->ld_magic == __swab32(LOV_DESC_MAGIC)) {
 815                             CDEBUG(D_OTHER, "%s: Swabbing lov desc %p\n",
 816                                    obd->obd_name, desc);
 817                             lustre_swab_lov_desc(desc);
 818                 } else {
 819                         CERROR("%s: Bad lov desc magic: %#x\n",
 820                                obd->obd_name, desc->ld_magic);
 821                         RETURN(-EINVAL);
 822                 }
 823         }
 824
 825         lov_fix_desc(desc);
 826
 827         desc->ld_active_tgt_count = 0;
 828         lov->desc = *desc;
 829         lov->lov_tgt_size = 0;
 830
 831         mutex_init(&lov->lov_lock);
 832         cfs_atomic_set(&lov->lov_refcount, 0);
 833         lov->lov_sp_me = LUSTRE_SP_CLI;
 834
 835         init_rwsem(&lov->lov_notify_lock);
 836
 837         lov->lov_pools_hash_body = cfs_hash_create("POOLS", HASH_POOLS_CUR_BITS,
 838                                                    HASH_POOLS_MAX_BITS,
 839                                                    HASH_POOLS_BKT_BITS, 0,
 840                                                    CFS_HASH_MIN_THETA,
 841                                                    CFS_HASH_MAX_THETA,
 842                                                    &pool_hash_operations,
 843                                                    CFS_HASH_DEFAULT);
 844         CFS_INIT_LIST_HEAD(&lov->lov_pool_list);
 845         lov->lov_pool_count = 0;
 846         rc = lov_ost_pool_init(&lov->lov_packed, 0);
 847         if (rc)
 848                 GOTO(out, rc);
 849
 850         lprocfs_lov_init_vars(&lvars);
 851         lprocfs_obd_setup(obd, lvars.obd_vars);
 852 #ifdef LPROCFS
 853         {
 854                 int rc;
 855
 856                 rc = lprocfs_seq_create(obd->obd_proc_entry, "target_obd",
 857                                         0444, &lov_proc_target_fops, obd);
 858                 if (rc)
 859                         CWARN("Error adding the target_obd file\n");
 860         }
 861 #endif
 862         lov->lov_pool_proc_entry = lprocfs_register("pools",
 863                                                     obd->obd_proc_entry,
 864                                                     NULL, NULL);
 865
 866         RETURN(0);
 867
 868 out:
 869         return rc;
 870 }
 871
 872 static int lov_precleanup(struct obd_device *obd, enum obd_cleanup_stage stage)
 873 {
 874         int rc = 0;
 875         struct lov_obd *lov = &obd->u.lov;
 876
 877         ENTRY;
 878
 879         switch (stage) {
 880         case OBD_CLEANUP_EARLY: {
 881                 int i;
 882                 for (i = 0; i < lov->desc.ld_tgt_count; i++) {
 883                         if (!lov->lov_tgts[i] || !lov->lov_tgts[i]->ltd_active)
 884                                 continue;
 885                         obd_precleanup(class_exp2obd(lov->lov_tgts[i]->ltd_exp),
 886                                        OBD_CLEANUP_EARLY);
 887                 }
 888                 break;
 889         }
 890         case OBD_CLEANUP_EXPORTS:
 891                 rc = obd_llog_finish(obd, 0);
 892                 if (rc != 0)
 893                         CERROR("failed to cleanup llogging subsystems\n");
 894                 break;
 895         }
 896         RETURN(rc);
 897 }
 898
 899 static int lov_cleanup(struct obd_device *obd)
 900 {
 901         struct lov_obd *lov = &obd->u.lov;
 902         cfs_list_t *pos, *tmp;
 903         struct pool_desc *pool;
 904         ENTRY;
 905
 906         cfs_list_for_each_safe(pos, tmp, &lov->lov_pool_list) {
 907                 pool = cfs_list_entry(pos, struct pool_desc, pool_list);
 908                 /* free pool structs */
 909                 CDEBUG(D_INFO, "delete pool %p\n", pool);
 910                 /* In the function below, .hs_keycmp resolves to
 911                  * pool_hashkey_keycmp() */
 912                 /* coverity[overrun-buffer-val] */
 913                 lov_pool_del(obd, pool->pool_name);
 914         }
 915         cfs_hash_putref(lov->lov_pools_hash_body);
 916         lov_ost_pool_free(&lov->lov_packed);
 917
 918         lprocfs_obd_cleanup(obd);
 919         if (lov->lov_tgts) {
 920                 int i;
 921                 obd_getref(obd);
 922                 for (i = 0; i < lov->desc.ld_tgt_count; i++) {
 923                         if (!lov->lov_tgts[i])
 924                                 continue;
 925
 926                         /* Inactive targets may never have connected */
 927                         if (lov->lov_tgts[i]->ltd_active ||
 928                             cfs_atomic_read(&lov->lov_refcount))
 929                             /* We should never get here - these
 930                                should have been removed in the
 931                              disconnect. */
 932                                 CERROR("lov tgt %d not cleaned!"
 933                                        " deathrow=%d, lovrc=%d\n",
 934                                        i, lov->lov_death_row,
 935                                        cfs_atomic_read(&lov->lov_refcount));
 936                         lov_del_target(obd, i, 0, 0);
 937                 }
 938                 obd_putref(obd);
 939                 OBD_FREE(lov->lov_tgts, sizeof(*lov->lov_tgts) *
 940                          lov->lov_tgt_size);
 941                 lov->lov_tgt_size = 0;
 942         }
 943         RETURN(0);
 944 }
 945
 946 int lov_process_config_base(struct obd_device *obd, struct lustre_cfg *lcfg,
 947                             __u32 *indexp, int *genp)
 948 {
 949         struct obd_uuid obd_uuid;
 950         int cmd;
 951         int rc = 0;
 952         ENTRY;
 953
 954         switch(cmd = lcfg->lcfg_command) {
 955         case LCFG_LOV_ADD_OBD:
 956         case LCFG_LOV_ADD_INA:
 957         case LCFG_LOV_DEL_OBD: {
 958                 __u32 index;
 959                 int gen;
 960                 /* lov_modify_tgts add  0:lov_mdsA  1:ost1_UUID  2:0  3:1 */
 961                 if (LUSTRE_CFG_BUFLEN(lcfg, 1) > sizeof(obd_uuid.uuid))
 962                         GOTO(out, rc = -EINVAL);
 963
 964                 obd_str2uuid(&obd_uuid,  lustre_cfg_buf(lcfg, 1));
 965
 966                 if (sscanf(lustre_cfg_buf(lcfg, 2), "%d", indexp) != 1)
 967                         GOTO(out, rc = -EINVAL);
 968                 if (sscanf(lustre_cfg_buf(lcfg, 3), "%d", genp) != 1)
 969                         GOTO(out, rc = -EINVAL);
 970                 index = *indexp;
 971                 gen = *genp;
 972                 if (cmd == LCFG_LOV_ADD_OBD)
 973                         rc = lov_add_target(obd, &obd_uuid, index, gen, 1);
 974                 else if (cmd == LCFG_LOV_ADD_INA)
 975                         rc = lov_add_target(obd, &obd_uuid, index, gen, 0);
 976                 else
 977                         rc = lov_del_target(obd, index, &obd_uuid, gen);
 978                 GOTO(out, rc);
 979         }
 980         case LCFG_PARAM: {
 981                 struct lprocfs_static_vars lvars = { 0 };
 982                 struct lov_desc *desc = &(obd->u.lov.desc);
 983
 984                 if (!desc)
 985                         GOTO(out, rc = -EINVAL);
 986
 987                 lprocfs_lov_init_vars(&lvars);
 988
 989                 rc = class_process_proc_param(PARAM_LOV, lvars.obd_vars,
 990                                               lcfg, obd);
 991                 if (rc > 0)
 992                         rc = 0;
 993                 GOTO(out, rc);
 994         }
 995         case LCFG_POOL_NEW:
 996         case LCFG_POOL_ADD:
 997         case LCFG_POOL_DEL:
 998         case LCFG_POOL_REM:
 999                 GOTO(out, rc);
1000
1001         default: {
1002                 CERROR("Unknown command: %d\n", lcfg->lcfg_command);
1003                 GOTO(out, rc = -EINVAL);
1004
1005         }
1006         }
1007 out:
1008         RETURN(rc);
1009 }
1010
1011 static int lov_recreate(struct obd_export *exp, struct obdo *src_oa,
1012                         struct lov_stripe_md **ea, struct obd_trans_info *oti)
1013 {
1014         struct lov_stripe_md *obj_mdp, *lsm;
1015         struct lov_obd *lov = &exp->exp_obd->u.lov;
1016         unsigned ost_idx;
1017         int rc, i;
1018         ENTRY;
1019
1020         LASSERT(src_oa->o_valid & OBD_MD_FLFLAGS &&
1021                 src_oa->o_flags & OBD_FL_RECREATE_OBJS);
1022
1023         OBD_ALLOC(obj_mdp, sizeof(*obj_mdp));
1024         if (obj_mdp == NULL)
1025                 RETURN(-ENOMEM);
1026
1027         ost_idx = src_oa->o_nlink;
1028         lsm = *ea;
1029         if (lsm == NULL)
1030                 GOTO(out, rc = -EINVAL);
1031         if (ost_idx >= lov->desc.ld_tgt_count ||
1032             !lov->lov_tgts[ost_idx])
1033                 GOTO(out, rc = -EINVAL);
1034
1035         for (i = 0; i < lsm->lsm_stripe_count; i++) {
1036                 if (lsm->lsm_oinfo[i]->loi_ost_idx == ost_idx) {
1037                         if (lsm->lsm_oinfo[i]->loi_id != src_oa->o_id)
1038                                 GOTO(out, rc = -EINVAL);
1039                         break;
1040                 }
1041         }
1042         if (i == lsm->lsm_stripe_count)
1043                 GOTO(out, rc = -EINVAL);
1044
1045         rc = obd_create(NULL, lov->lov_tgts[ost_idx]->ltd_exp,
1046                         src_oa, &obj_mdp, oti);
1047 out:
1048         OBD_FREE(obj_mdp, sizeof(*obj_mdp));
1049         RETURN(rc);
1050 }
1051
1052 /* the LOV expects oa->o_id to be set to the LOV object id */
1053 static int lov_create(const struct lu_env *env, struct obd_export *exp,
1054                       struct obdo *src_oa, struct lov_stripe_md **ea,
1055                       struct obd_trans_info *oti)
1056 {
1057         struct lov_obd *lov;
1058         int rc = 0;
1059         ENTRY;
1060
1061         LASSERT(ea != NULL);
1062         if (exp == NULL)
1063                 RETURN(-EINVAL);
1064
1065         if ((src_oa->o_valid & OBD_MD_FLFLAGS) &&
1066             src_oa->o_flags == OBD_FL_DELORPHAN) {
1067                 /* should be used with LOV anymore */
1068                 LBUG();
1069         }
1070
1071         lov = &exp->exp_obd->u.lov;
1072         if (!lov->desc.ld_active_tgt_count)
1073                 RETURN(-EIO);
1074
1075         obd_getref(exp->exp_obd);
1076         /* Recreate a specific object id at the given OST index */
1077         if ((src_oa->o_valid & OBD_MD_FLFLAGS) &&
1078             (src_oa->o_flags & OBD_FL_RECREATE_OBJS)) {
1079                  rc = lov_recreate(exp, src_oa, ea, oti);
1080         }
1081
1082         obd_putref(exp->exp_obd);
1083         RETURN(rc);
1084 }
1085
1086 #define ASSERT_LSM_MAGIC(lsmp)                                                  \
1087 do {                                                                            \
1088         LASSERT((lsmp) != NULL);                                                \
1089         LASSERTF(((lsmp)->lsm_magic == LOV_MAGIC_V1 ||                          \
1090                  (lsmp)->lsm_magic == LOV_MAGIC_V3),                            \
1091                  "%p->lsm_magic=%x\n", (lsmp), (lsmp)->lsm_magic);              \
1092 } while (0)
1093
1094 static int lov_destroy(const struct lu_env *env, struct obd_export *exp,
1095                        struct obdo *oa, struct lov_stripe_md *lsm,
1096                        struct obd_trans_info *oti, struct obd_export *md_exp,
1097                        void *capa)
1098 {
1099         struct lov_request_set *set;
1100         struct obd_info oinfo;
1101         struct lov_request *req;
1102         cfs_list_t *pos;
1103         struct lov_obd *lov;
1104         int rc = 0, err = 0;
1105         ENTRY;
1106
1107         ASSERT_LSM_MAGIC(lsm);
1108
1109         if (!exp || !exp->exp_obd)
1110                 RETURN(-ENODEV);
1111
1112         if (oa->o_valid & OBD_MD_FLCOOKIE) {
1113                 LASSERT(oti);
1114                 LASSERT(oti->oti_logcookies);
1115         }
1116
1117         lov = &exp->exp_obd->u.lov;
1118         obd_getref(exp->exp_obd);
1119         rc = lov_prep_destroy_set(exp, &oinfo, oa, lsm, oti, &set);
1120         if (rc)
1121                 GOTO(out, rc);
1122
1123         cfs_list_for_each (pos, &set->set_list) {
1124                 req = cfs_list_entry(pos, struct lov_request, rq_link);
1125
1126                 if (oa->o_valid & OBD_MD_FLCOOKIE)
1127                         oti->oti_logcookies = set->set_cookies + req->rq_stripe;
1128
1129                 err = obd_destroy(env, lov->lov_tgts[req->rq_idx]->ltd_exp,
1130                                   req->rq_oi.oi_oa, NULL, oti, NULL, capa);
1131                 err = lov_update_common_set(set, req, err);
1132                 if (err) {
1133                         CERROR("error: destroying objid "LPX64" subobj "
1134                                LPX64" on OST idx %d: rc = %d\n",
1135                                oa->o_id, req->rq_oi.oi_oa->o_id,
1136                                req->rq_idx, err);
1137                         if (!rc)
1138                                 rc = err;
1139                 }
1140         }
1141
1142         if (rc == 0) {
1143                 LASSERT(lsm_op_find(lsm->lsm_magic) != NULL);
1144                 rc = lsm_op_find(lsm->lsm_magic)->lsm_destroy(lsm, oa, md_exp);
1145         }
1146         err = lov_fini_destroy_set(set);
1147 out:
1148         obd_putref(exp->exp_obd);
1149         RETURN(rc ? rc : err);
1150 }
1151
1152 static int lov_getattr(const struct lu_env *env, struct obd_export *exp,
1153                        struct obd_info *oinfo)
1154 {
1155         struct lov_request_set *set;
1156         struct lov_request *req;
1157         cfs_list_t *pos;
1158         struct lov_obd *lov;
1159         int err = 0, rc = 0;
1160         ENTRY;
1161
1162         LASSERT(oinfo);
1163         ASSERT_LSM_MAGIC(oinfo->oi_md);
1164
1165         if (!exp || !exp->exp_obd)
1166                 RETURN(-ENODEV);
1167
1168         lov = &exp->exp_obd->u.lov;
1169
1170         rc = lov_prep_getattr_set(exp, oinfo, &set);
1171         if (rc)
1172                 RETURN(rc);
1173
1174         cfs_list_for_each (pos, &set->set_list) {
1175                 req = cfs_list_entry(pos, struct lov_request, rq_link);
1176
1177                 CDEBUG(D_INFO, "objid "LPX64"[%d] has subobj "LPX64" at idx "
1178                        "%u\n", oinfo->oi_oa->o_id, req->rq_stripe,
1179                        req->rq_oi.oi_oa->o_id, req->rq_idx);
1180
1181                 rc = obd_getattr(env, lov->lov_tgts[req->rq_idx]->ltd_exp,
1182                                  &req->rq_oi);
1183                 err = lov_update_common_set(set, req, rc);
1184                 if (err) {
1185                         CERROR("error: getattr objid "LPX64" subobj "
1186                                LPX64" on OST idx %d: rc = %d\n",
1187                                oinfo->oi_oa->o_id, req->rq_oi.oi_oa->o_id,
1188                                req->rq_idx, err);
1189                         break;
1190                 }
1191         }
1192
1193         rc = lov_fini_getattr_set(set);
1194         if (err)
1195                 rc = err;
1196         RETURN(rc);
1197 }
1198
1199 static int lov_getattr_interpret(struct ptlrpc_request_set *rqset,
1200                                  void *data, int rc)
1201 {
1202         struct lov_request_set *lovset = (struct lov_request_set *)data;
1203         int err;
1204         ENTRY;
1205
1206         /* don't do attribute merge if this aysnc op failed */
1207         if (rc)
1208                 cfs_atomic_set(&lovset->set_completes, 0);
1209         err = lov_fini_getattr_set(lovset);
1210         RETURN(rc ? rc : err);
1211 }
1212
1213 static int lov_getattr_async(struct obd_export *exp, struct obd_info *oinfo,
1214                               struct ptlrpc_request_set *rqset)
1215 {
1216         struct lov_request_set *lovset;
1217         struct lov_obd *lov;
1218         cfs_list_t *pos;
1219         struct lov_request *req;
1220         int rc = 0, err;
1221         ENTRY;
1222
1223         LASSERT(oinfo);
1224         ASSERT_LSM_MAGIC(oinfo->oi_md);
1225
1226         if (!exp || !exp->exp_obd)
1227                 RETURN(-ENODEV);
1228
1229         lov = &exp->exp_obd->u.lov;
1230
1231         rc = lov_prep_getattr_set(exp, oinfo, &lovset);
1232         if (rc)
1233                 RETURN(rc);
1234
1235         CDEBUG(D_INFO, "objid "LPX64": %ux%u byte stripes\n",
1236                oinfo->oi_md->lsm_object_id, oinfo->oi_md->lsm_stripe_count,
1237                oinfo->oi_md->lsm_stripe_size);
1238
1239         cfs_list_for_each (pos, &lovset->set_list) {
1240                 req = cfs_list_entry(pos, struct lov_request, rq_link);
1241
1242                 CDEBUG(D_INFO, "objid "LPX64"[%d] has subobj "LPX64" at idx "
1243                        "%u\n", oinfo->oi_oa->o_id, req->rq_stripe,
1244                        req->rq_oi.oi_oa->o_id, req->rq_idx);
1245                 rc = obd_getattr_async(lov->lov_tgts[req->rq_idx]->ltd_exp,
1246                                        &req->rq_oi, rqset);
1247                 if (rc) {
1248                         CERROR("error: getattr objid "LPX64" subobj "
1249                                LPX64" on OST idx %d: rc = %d\n",
1250                                oinfo->oi_oa->o_id, req->rq_oi.oi_oa->o_id,
1251                                req->rq_idx, rc);
1252                         GOTO(out, rc);
1253                 }
1254         }
1255
1256         if (!cfs_list_empty(&rqset->set_requests)) {
1257                 LASSERT(rc == 0);
1258                 LASSERT (rqset->set_interpret == NULL);
1259                 rqset->set_interpret = lov_getattr_interpret;
1260                 rqset->set_arg = (void *)lovset;
1261                 RETURN(rc);
1262         }
1263 out:
1264         if (rc)
1265                 cfs_atomic_set(&lovset->set_completes, 0);
1266         err = lov_fini_getattr_set(lovset);
1267         RETURN(rc ? rc : err);
1268 }
1269
1270 static int lov_setattr(const struct lu_env *env, struct obd_export *exp,
1271                        struct obd_info *oinfo, struct obd_trans_info *oti)
1272 {
1273         struct lov_request_set *set;
1274         struct lov_obd *lov;
1275         cfs_list_t *pos;
1276         struct lov_request *req;
1277         int err = 0, rc = 0;
1278         ENTRY;
1279
1280         LASSERT(oinfo);
1281         ASSERT_LSM_MAGIC(oinfo->oi_md);
1282
1283         if (!exp || !exp->exp_obd)
1284                 RETURN(-ENODEV);
1285
1286         /* for now, we only expect the following updates here */
1287         LASSERT(!(oinfo->oi_oa->o_valid & ~(OBD_MD_FLID | OBD_MD_FLTYPE |
1288                                             OBD_MD_FLMODE | OBD_MD_FLATIME |
1289                                             OBD_MD_FLMTIME | OBD_MD_FLCTIME |
1290                                             OBD_MD_FLFLAGS | OBD_MD_FLSIZE |
1291                                             OBD_MD_FLGROUP | OBD_MD_FLUID |
1292                                             OBD_MD_FLGID | OBD_MD_FLFID |
1293                                             OBD_MD_FLGENER)));
1294         lov = &exp->exp_obd->u.lov;
1295         rc = lov_prep_setattr_set(exp, oinfo, oti, &set);
1296         if (rc)
1297                 RETURN(rc);
1298
1299         cfs_list_for_each (pos, &set->set_list) {
1300                 req = cfs_list_entry(pos, struct lov_request, rq_link);
1301
1302                 rc = obd_setattr(env, lov->lov_tgts[req->rq_idx]->ltd_exp,
1303                                  &req->rq_oi, NULL);
1304                 err = lov_update_setattr_set(set, req, rc);
1305                 if (err) {
1306                         CERROR("error: setattr objid "LPX64" subobj "
1307                                LPX64" on OST idx %d: rc = %d\n",
1308                                set->set_oi->oi_oa->o_id,
1309                                req->rq_oi.oi_oa->o_id, req->rq_idx, err);
1310                         if (!rc)
1311                                 rc = err;
1312                 }
1313         }
1314         err = lov_fini_setattr_set(set);
1315         if (!rc)
1316                 rc = err;
1317         RETURN(rc);
1318 }
1319
1320 static int lov_setattr_interpret(struct ptlrpc_request_set *rqset,
1321                                  void *data, int rc)
1322 {
1323         struct lov_request_set *lovset = (struct lov_request_set *)data;
1324         int err;
1325         ENTRY;
1326
1327         if (rc)
1328                 cfs_atomic_set(&lovset->set_completes, 0);
1329         err = lov_fini_setattr_set(lovset);
1330         RETURN(rc ? rc : err);
1331 }
1332
1333 /* If @oti is given, the request goes from MDS and responses from OSTs are not
1334    needed. Otherwise, a client is waiting for responses. */
1335 static int lov_setattr_async(struct obd_export *exp, struct obd_info *oinfo,
1336                              struct obd_trans_info *oti,
1337                              struct ptlrpc_request_set *rqset)
1338 {
1339         struct lov_request_set *set;
1340         struct lov_request *req;
1341         cfs_list_t *pos;
1342         struct lov_obd *lov;
1343         int rc = 0;
1344         ENTRY;
1345
1346         LASSERT(oinfo);
1347         ASSERT_LSM_MAGIC(oinfo->oi_md);
1348         if (oinfo->oi_oa->o_valid & OBD_MD_FLCOOKIE) {
1349                 LASSERT(oti);
1350                 LASSERT(oti->oti_logcookies);
1351         }
1352
1353         if (!exp || !exp->exp_obd)
1354                 RETURN(-ENODEV);
1355
1356         lov = &exp->exp_obd->u.lov;
1357         rc = lov_prep_setattr_set(exp, oinfo, oti, &set);
1358         if (rc)
1359                 RETURN(rc);
1360
1361         CDEBUG(D_INFO, "objid "LPX64": %ux%u byte stripes\n",
1362                oinfo->oi_md->lsm_object_id, oinfo->oi_md->lsm_stripe_count,
1363                oinfo->oi_md->lsm_stripe_size);
1364
1365         cfs_list_for_each (pos, &set->set_list) {
1366                 req = cfs_list_entry(pos, struct lov_request, rq_link);
1367
1368                 if (oinfo->oi_oa->o_valid & OBD_MD_FLCOOKIE)
1369                         oti->oti_logcookies = set->set_cookies + req->rq_stripe;
1370
1371                 CDEBUG(D_INFO, "objid "LPX64"[%d] has subobj "LPX64" at idx "
1372                        "%u\n", oinfo->oi_oa->o_id, req->rq_stripe,
1373                        req->rq_oi.oi_oa->o_id, req->rq_idx);
1374
1375                 rc = obd_setattr_async(lov->lov_tgts[req->rq_idx]->ltd_exp,
1376                                        &req->rq_oi, oti, rqset);
1377                 if (rc) {
1378                         CERROR("error: setattr objid "LPX64" subobj "
1379                                LPX64" on OST idx %d: rc = %d\n",
1380                                set->set_oi->oi_oa->o_id,
1381                                req->rq_oi.oi_oa->o_id,
1382                                req->rq_idx, rc);
1383                         break;
1384                 }
1385         }
1386
1387         /* If we are not waiting for responses on async requests, return. */
1388         if (rc || !rqset || cfs_list_empty(&rqset->set_requests)) {
1389                 int err;
1390                 if (rc)
1391                         cfs_atomic_set(&set->set_completes, 0);
1392                 err = lov_fini_setattr_set(set);
1393                 RETURN(rc ? rc : err);
1394         }
1395
1396         LASSERT(rqset->set_interpret == NULL);
1397         rqset->set_interpret = lov_setattr_interpret;
1398         rqset->set_arg = (void *)set;
1399
1400         RETURN(0);
1401 }
1402
1403 static int lov_punch_interpret(struct ptlrpc_request_set *rqset,
1404                                void *data, int rc)
1405 {
1406         struct lov_request_set *lovset = (struct lov_request_set *)data;
1407         int err;
1408         ENTRY;
1409
1410         if (rc)
1411                 cfs_atomic_set(&lovset->set_completes, 0);
1412         err = lov_fini_punch_set(lovset);
1413         RETURN(rc ? rc : err);
1414 }
1415
1416 /* FIXME: maybe we'll just make one node the authoritative attribute node, then
1417  * we can send this 'punch' to just the authoritative node and the nodes
1418  * that the punch will affect. */
1419 static int lov_punch(const struct lu_env *env, struct obd_export *exp,
1420                      struct obd_info *oinfo, struct obd_trans_info *oti,
1421                      struct ptlrpc_request_set *rqset)
1422 {
1423         struct lov_request_set *set;
1424         struct lov_obd *lov;
1425         cfs_list_t *pos;
1426         struct lov_request *req;
1427         int rc = 0;
1428         ENTRY;
1429
1430         LASSERT(oinfo);
1431         ASSERT_LSM_MAGIC(oinfo->oi_md);
1432
1433         if (!exp || !exp->exp_obd)
1434                 RETURN(-ENODEV);
1435
1436         lov = &exp->exp_obd->u.lov;
1437         rc = lov_prep_punch_set(exp, oinfo, oti, &set);
1438         if (rc)
1439                 RETURN(rc);
1440
1441         cfs_list_for_each (pos, &set->set_list) {
1442                 req = cfs_list_entry(pos, struct lov_request, rq_link);
1443
1444                 rc = obd_punch(env, lov->lov_tgts[req->rq_idx]->ltd_exp,
1445                                &req->rq_oi, NULL, rqset);
1446                 if (rc) {
1447                         CERROR("error: punch objid "LPX64" subobj "LPX64
1448                                " on OST idx %d: rc = %d\n",
1449                                set->set_oi->oi_oa->o_id,
1450                                req->rq_oi.oi_oa->o_id, req->rq_idx, rc);
1451                         break;
1452                 }
1453         }
1454
1455         if (rc || cfs_list_empty(&rqset->set_requests)) {
1456                 int err;
1457                 err = lov_fini_punch_set(set);
1458                 RETURN(rc ? rc : err);
1459         }
1460
1461         LASSERT(rqset->set_interpret == NULL);
1462         rqset->set_interpret = lov_punch_interpret;
1463         rqset->set_arg = (void *)set;
1464
1465         RETURN(0);
1466 }
1467
1468 static int lov_sync_interpret(struct ptlrpc_request_set *rqset,
1469                               void *data, int rc)
1470 {
1471         struct lov_request_set *lovset = data;
1472         int err;
1473         ENTRY;
1474
1475         if (rc)
1476                 cfs_atomic_set(&lovset->set_completes, 0);
1477         err = lov_fini_sync_set(lovset);
1478         RETURN(rc ?: err);
1479 }
1480
1481 static int lov_sync(const struct lu_env *env, struct obd_export *exp,
1482                     struct obd_info *oinfo, obd_off start, obd_off end,
1483                     struct ptlrpc_request_set *rqset)
1484 {
1485         struct lov_request_set *set = NULL;
1486         struct lov_obd *lov;
1487         cfs_list_t *pos;
1488         struct lov_request *req;
1489         int rc = 0;
1490         ENTRY;
1491
1492         ASSERT_LSM_MAGIC(oinfo->oi_md);
1493         LASSERT(rqset != NULL);
1494
1495         if (!exp->exp_obd)
1496                 RETURN(-ENODEV);
1497
1498         lov = &exp->exp_obd->u.lov;
1499         rc = lov_prep_sync_set(exp, oinfo, start, end, &set);
1500         if (rc)
1501                 RETURN(rc);
1502
1503         CDEBUG(D_INFO, "fsync objid "LPX64" ["LPX64", "LPX64"]\n",
1504                set->set_oi->oi_oa->o_id, start, end);
1505
1506         cfs_list_for_each (pos, &set->set_list) {
1507                 req = cfs_list_entry(pos, struct lov_request, rq_link);
1508
1509                 rc = obd_sync(env, lov->lov_tgts[req->rq_idx]->ltd_exp,
1510                               &req->rq_oi, req->rq_oi.oi_policy.l_extent.start,
1511                               req->rq_oi.oi_policy.l_extent.end, rqset);
1512                 if (rc) {
1513                         CERROR("error: fsync objid "LPX64" subobj "LPX64
1514                                " on OST idx %d: rc = %d\n",
1515                                set->set_oi->oi_oa->o_id,
1516                                req->rq_oi.oi_oa->o_id, req->rq_idx, rc);
1517                         break;
1518                 }
1519         }
1520
1521         /* If we are not waiting for responses on async requests, return. */
1522         if (rc || cfs_list_empty(&rqset->set_requests)) {
1523                 int err = lov_fini_sync_set(set);
1524
1525                 RETURN(rc ?: err);
1526         }
1527
1528         LASSERT(rqset->set_interpret == NULL);
1529         rqset->set_interpret = lov_sync_interpret;
1530         rqset->set_arg = (void *)set;
1531
1532         RETURN(0);
1533 }
1534
1535 static int lov_brw_check(struct lov_obd *lov, struct obd_info *lov_oinfo,
1536                          obd_count oa_bufs, struct brw_page *pga)
1537 {
1538         struct obd_info oinfo = { { { 0 } } };
1539         int i, rc = 0;
1540
1541         oinfo.oi_oa = lov_oinfo->oi_oa;
1542
1543         /* The caller just wants to know if there's a chance that this
1544          * I/O can succeed */
1545         for (i = 0; i < oa_bufs; i++) {
1546                 int stripe = lov_stripe_number(lov_oinfo->oi_md, pga[i].off);
1547                 int ost = lov_oinfo->oi_md->lsm_oinfo[stripe]->loi_ost_idx;
1548                 obd_off start, end;
1549
1550                 if (!lov_stripe_intersects(lov_oinfo->oi_md, i, pga[i].off,
1551                                            pga[i].off + pga[i].count - 1,
1552                                            &start, &end))
1553                         continue;
1554
1555                 if (!lov->lov_tgts[ost] || !lov->lov_tgts[ost]->ltd_active) {
1556                         CDEBUG(D_HA, "lov idx %d inactive\n", ost);
1557                         return -EIO;
1558                 }
1559
1560                 rc = obd_brw(OBD_BRW_CHECK, lov->lov_tgts[ost]->ltd_exp, &oinfo,
1561                              1, &pga[i], NULL);
1562                 if (rc)
1563                         break;
1564         }
1565         return rc;
1566 }
1567
1568 static int lov_brw(int cmd, struct obd_export *exp, struct obd_info *oinfo,
1569                    obd_count oa_bufs, struct brw_page *pga,
1570                    struct obd_trans_info *oti)
1571 {
1572         struct lov_request_set *set;
1573         struct lov_request *req;
1574         cfs_list_t *pos;
1575         struct lov_obd *lov = &exp->exp_obd->u.lov;
1576         int err, rc = 0;
1577         ENTRY;
1578
1579         ASSERT_LSM_MAGIC(oinfo->oi_md);
1580
1581         if (cmd == OBD_BRW_CHECK) {
1582                 rc = lov_brw_check(lov, oinfo, oa_bufs, pga);
1583                 RETURN(rc);
1584         }
1585
1586         rc = lov_prep_brw_set(exp, oinfo, oa_bufs, pga, oti, &set);
1587         if (rc)
1588                 RETURN(rc);
1589
1590         cfs_list_for_each (pos, &set->set_list) {
1591                 struct obd_export *sub_exp;
1592                 struct brw_page *sub_pga;
1593                 req = cfs_list_entry(pos, struct lov_request, rq_link);
1594
1595                 sub_exp = lov->lov_tgts[req->rq_idx]->ltd_exp;
1596                 sub_pga = set->set_pga + req->rq_pgaidx;
1597                 rc = obd_brw(cmd, sub_exp, &req->rq_oi, req->rq_oabufs,
1598                              sub_pga, oti);
1599                 if (rc)
1600                         break;
1601                 lov_update_common_set(set, req, rc);
1602         }
1603
1604         err = lov_fini_brw_set(set);
1605         if (!rc)
1606                 rc = err;
1607         RETURN(rc);
1608 }
1609
1610 static int lov_enqueue_interpret(struct ptlrpc_request_set *rqset,
1611                                  void *data, int rc)
1612 {
1613         struct lov_request_set *lovset = (struct lov_request_set *)data;
1614         ENTRY;
1615         rc = lov_fini_enqueue_set(lovset, lovset->set_ei->ei_mode, rc, rqset);
1616         RETURN(rc);
1617 }
1618
1619 static int lov_enqueue(struct obd_export *exp, struct obd_info *oinfo,
1620                        struct ldlm_enqueue_info *einfo,
1621                        struct ptlrpc_request_set *rqset)
1622 {
1623         ldlm_mode_t mode = einfo->ei_mode;
1624         struct lov_request_set *set;
1625         struct lov_request *req;
1626         cfs_list_t *pos;
1627         struct lov_obd *lov;
1628         ldlm_error_t rc;
1629         ENTRY;
1630
1631         LASSERT(oinfo);
1632         ASSERT_LSM_MAGIC(oinfo->oi_md);
1633         LASSERT(mode == (mode & -mode));
1634
1635         /* we should never be asked to replay a lock this way. */
1636         LASSERT((oinfo->oi_flags & LDLM_FL_REPLAY) == 0);
1637
1638         if (!exp || !exp->exp_obd)
1639                 RETURN(-ENODEV);
1640
1641         lov = &exp->exp_obd->u.lov;
1642         rc = lov_prep_enqueue_set(exp, oinfo, einfo, &set);
1643         if (rc)
1644                 RETURN(rc);
1645
1646         cfs_list_for_each (pos, &set->set_list) {
1647                 req = cfs_list_entry(pos, struct lov_request, rq_link);
1648
1649                 rc = obd_enqueue(lov->lov_tgts[req->rq_idx]->ltd_exp,
1650                                  &req->rq_oi, einfo, rqset);
1651                 if (rc != ELDLM_OK)
1652                         GOTO(out, rc);
1653         }
1654
1655         if (rqset && !cfs_list_empty(&rqset->set_requests)) {
1656                 LASSERT(rc == 0);
1657                 LASSERT(rqset->set_interpret == NULL);
1658                 rqset->set_interpret = lov_enqueue_interpret;
1659                 rqset->set_arg = (void *)set;
1660                 RETURN(rc);
1661         }
1662 out:
1663         rc = lov_fini_enqueue_set(set, mode, rc, rqset);
1664         RETURN(rc);
1665 }
1666
1667 static int lov_change_cbdata(struct obd_export *exp,
1668                              struct lov_stripe_md *lsm, ldlm_iterator_t it,
1669                              void *data)
1670 {
1671         struct lov_obd *lov;
1672         int rc = 0, i;
1673         ENTRY;
1674
1675         ASSERT_LSM_MAGIC(lsm);
1676
1677         if (!exp || !exp->exp_obd)
1678                 RETURN(-ENODEV);
1679
1680         lov = &exp->exp_obd->u.lov;
1681         for (i = 0; i < lsm->lsm_stripe_count; i++) {
1682                 struct lov_stripe_md submd;
1683                 struct lov_oinfo *loi = lsm->lsm_oinfo[i];
1684
1685                 if (!lov->lov_tgts[loi->loi_ost_idx]) {
1686                         CDEBUG(D_HA, "lov idx %d NULL \n", loi->loi_ost_idx);
1687                         continue;
1688                 }
1689
1690                 LASSERT_SEQ_IS_MDT(loi->loi_seq);
1691                 submd.lsm_object_id = loi->loi_id;
1692                 submd.lsm_object_seq = loi->loi_seq;
1693                 submd.lsm_stripe_count = 0;
1694                 rc = obd_change_cbdata(lov->lov_tgts[loi->loi_ost_idx]->ltd_exp,
1695                                        &submd, it, data);
1696         }
1697         RETURN(rc);
1698 }
1699
1700 /* find any ldlm lock of the inode in lov
1701  * return 0    not find
1702  *        1    find one
1703  *      < 0    error */
1704 static int lov_find_cbdata(struct obd_export *exp,
1705                            struct lov_stripe_md *lsm, ldlm_iterator_t it,
1706                            void *data)
1707 {
1708         struct lov_obd *lov;
1709         int rc = 0, i;
1710         ENTRY;
1711
1712         ASSERT_LSM_MAGIC(lsm);
1713
1714         if (!exp || !exp->exp_obd)
1715                 RETURN(-ENODEV);
1716
1717         lov = &exp->exp_obd->u.lov;
1718         for (i = 0; i < lsm->lsm_stripe_count; i++) {
1719                 struct lov_stripe_md submd;
1720                 struct lov_oinfo *loi = lsm->lsm_oinfo[i];
1721
1722                 if (!lov->lov_tgts[loi->loi_ost_idx]) {
1723                         CDEBUG(D_HA, "lov idx %d NULL \n", loi->loi_ost_idx);
1724                         continue;
1725                 }
1726
1727                 LASSERT_SEQ_IS_MDT(loi->loi_seq);
1728                 submd.lsm_object_id = loi->loi_id;
1729                 submd.lsm_object_seq = loi->loi_seq;
1730                 submd.lsm_stripe_count = 0;
1731                 rc = obd_find_cbdata(lov->lov_tgts[loi->loi_ost_idx]->ltd_exp,
1732                                      &submd, it, data);
1733                 if (rc != 0)
1734                         RETURN(rc);
1735         }
1736         RETURN(rc);
1737 }
1738
1739 static int lov_cancel(struct obd_export *exp, struct lov_stripe_md *lsm,
1740                       __u32 mode, struct lustre_handle *lockh)
1741 {
1742         struct lov_request_set *set;
1743         struct obd_info oinfo;
1744         struct lov_request *req;
1745         cfs_list_t *pos;
1746         struct lov_obd *lov;
1747         struct lustre_handle *lov_lockhp;
1748         int err = 0, rc = 0;
1749         ENTRY;
1750
1751         ASSERT_LSM_MAGIC(lsm);
1752
1753         if (!exp || !exp->exp_obd)
1754                 RETURN(-ENODEV);
1755
1756         LASSERT_SEQ_IS_MDT(lsm->lsm_object_seq);
1757         LASSERT(lockh);
1758         lov = &exp->exp_obd->u.lov;
1759         rc = lov_prep_cancel_set(exp, &oinfo, lsm, mode, lockh, &set);
1760         if (rc)
1761                 RETURN(rc);
1762
1763         cfs_list_for_each (pos, &set->set_list) {
1764                 req = cfs_list_entry(pos, struct lov_request, rq_link);
1765                 lov_lockhp = set->set_lockh->llh_handles + req->rq_stripe;
1766
1767                 rc = obd_cancel(lov->lov_tgts[req->rq_idx]->ltd_exp,
1768                                 req->rq_oi.oi_md, mode, lov_lockhp);
1769                 rc = lov_update_common_set(set, req, rc);
1770                 if (rc) {
1771                         CERROR("error: cancel objid "LPX64" subobj "
1772                                LPX64" on OST idx %d: rc = %d\n",
1773                                lsm->lsm_object_id,
1774                                req->rq_oi.oi_md->lsm_object_id,
1775                                req->rq_idx, rc);
1776                         err = rc;
1777                 }
1778
1779         }
1780         lov_fini_cancel_set(set);
1781         RETURN(err);
1782 }
1783
1784 static int lov_cancel_unused(struct obd_export *exp,
1785                              struct lov_stripe_md *lsm,
1786                              ldlm_cancel_flags_t flags, void *opaque)
1787 {
1788         struct lov_obd *lov;
1789         int rc = 0, i;
1790         ENTRY;
1791
1792         if (!exp || !exp->exp_obd)
1793                 RETURN(-ENODEV);
1794
1795         lov = &exp->exp_obd->u.lov;
1796         if (lsm == NULL) {
1797                 for (i = 0; i < lov->desc.ld_tgt_count; i++) {
1798                         int err;
1799                         if (!lov->lov_tgts[i] || !lov->lov_tgts[i]->ltd_exp)
1800                                 continue;
1801
1802                         err = obd_cancel_unused(lov->lov_tgts[i]->ltd_exp, NULL,
1803                                                 flags, opaque);
1804                         if (!rc)
1805                                 rc = err;
1806                 }
1807                 RETURN(rc);
1808         }
1809
1810         ASSERT_LSM_MAGIC(lsm);
1811
1812         LASSERT_SEQ_IS_MDT(lsm->lsm_object_seq);
1813         for (i = 0; i < lsm->lsm_stripe_count; i++) {
1814                 struct lov_stripe_md submd;
1815                 struct lov_oinfo *loi = lsm->lsm_oinfo[i];
1816                 int err;
1817
1818                 if (!lov->lov_tgts[loi->loi_ost_idx]) {
1819                         CDEBUG(D_HA, "lov idx %d NULL\n", loi->loi_ost_idx);
1820                         continue;
1821                 }
1822
1823                 if (!lov->lov_tgts[loi->loi_ost_idx]->ltd_active)
1824                         CDEBUG(D_HA, "lov idx %d inactive\n", loi->loi_ost_idx);
1825
1826                 submd.lsm_object_id = loi->loi_id;
1827                 submd.lsm_object_seq = loi->loi_seq;
1828                 submd.lsm_stripe_count = 0;
1829                 err = obd_cancel_unused(lov->lov_tgts[loi->loi_ost_idx]->ltd_exp,
1830                                         &submd, flags, opaque);
1831                 if (err && lov->lov_tgts[loi->loi_ost_idx]->ltd_active) {
1832                         CERROR("error: cancel unused objid "LPX64" subobj "LPX64
1833                                " on OST idx %d: rc = %d\n", lsm->lsm_object_id,
1834                                loi->loi_id, loi->loi_ost_idx, err);
1835                         if (!rc)
1836                                 rc = err;
1837                 }
1838         }
1839         RETURN(rc);
1840 }
1841
1842 int lov_statfs_interpret(struct ptlrpc_request_set *rqset, void *data, int rc)
1843 {
1844         struct lov_request_set *lovset = (struct lov_request_set *)data;
1845         int err;
1846         ENTRY;
1847
1848         if (rc)
1849                 cfs_atomic_set(&lovset->set_completes, 0);
1850
1851         err = lov_fini_statfs_set(lovset);
1852         RETURN(rc ? rc : err);
1853 }
1854
1855 static int lov_statfs_async(struct obd_export *exp, struct obd_info *oinfo,
1856                             __u64 max_age, struct ptlrpc_request_set *rqset)
1857 {
1858         struct obd_device      *obd = class_exp2obd(exp);
1859         struct lov_request_set *set;
1860         struct lov_request *req;
1861         cfs_list_t *pos;
1862         struct lov_obd *lov;
1863         int rc = 0;
1864         ENTRY;
1865
1866         LASSERT(oinfo != NULL);
1867         LASSERT(oinfo->oi_osfs != NULL);
1868
1869         lov = &obd->u.lov;
1870         rc = lov_prep_statfs_set(obd, oinfo, &set);
1871         if (rc)
1872                 RETURN(rc);
1873
1874         cfs_list_for_each (pos, &set->set_list) {
1875                 req = cfs_list_entry(pos, struct lov_request, rq_link);
1876                 rc = obd_statfs_async(lov->lov_tgts[req->rq_idx]->ltd_exp,
1877                                       &req->rq_oi, max_age, rqset);
1878                 if (rc)
1879                         break;
1880         }
1881
1882         if (rc || cfs_list_empty(&rqset->set_requests)) {
1883                 int err;
1884                 if (rc)
1885                         cfs_atomic_set(&set->set_completes, 0);
1886                 err = lov_fini_statfs_set(set);
1887                 RETURN(rc ? rc : err);
1888         }
1889
1890         LASSERT(rqset->set_interpret == NULL);
1891         rqset->set_interpret = lov_statfs_interpret;
1892         rqset->set_arg = (void *)set;
1893         RETURN(0);
1894 }
1895
1896 static int lov_statfs(const struct lu_env *env, struct obd_export *exp,
1897                       struct obd_statfs *osfs, __u64 max_age, __u32 flags)
1898 {
1899         struct ptlrpc_request_set *set = NULL;
1900         struct obd_info oinfo = { { { 0 } } };
1901         int rc = 0;
1902         ENTRY;
1903
1904
1905         /* for obdclass we forbid using obd_statfs_rqset, but prefer using async
1906          * statfs requests */
1907         set = ptlrpc_prep_set();
1908         if (set == NULL)
1909                 RETURN(-ENOMEM);
1910
1911         oinfo.oi_osfs = osfs;
1912         oinfo.oi_flags = flags;
1913         rc = lov_statfs_async(exp, &oinfo, max_age, set);
1914         if (rc == 0)
1915                 rc = ptlrpc_set_wait(set);
1916         ptlrpc_set_destroy(set);
1917
1918         RETURN(rc);
1919 }
1920
1921 static int lov_iocontrol(unsigned int cmd, struct obd_export *exp, int len,
1922                          void *karg, void *uarg)
1923 {
1924         struct obd_device *obddev = class_exp2obd(exp);
1925         struct lov_obd *lov = &obddev->u.lov;
1926         int i = 0, rc = 0, count = lov->desc.ld_tgt_count;
1927         struct obd_uuid *uuidp;
1928         ENTRY;
1929
1930         switch (cmd) {
1931         case IOC_OBD_STATFS: {
1932                 struct obd_ioctl_data *data = karg;
1933                 struct obd_device *osc_obd;
1934                 struct obd_statfs stat_buf = {0};
1935                 __u32 index;
1936                 __u32 flags;
1937
1938                 memcpy(&index, data->ioc_inlbuf2, sizeof(__u32));
1939                 if ((index >= count))
1940                         RETURN(-ENODEV);
1941
1942                 if (!lov->lov_tgts[index])
1943                         /* Try again with the next index */
1944                         RETURN(-EAGAIN);
1945                 if (!lov->lov_tgts[index]->ltd_active)
1946                         RETURN(-ENODATA);
1947
1948                 osc_obd = class_exp2obd(lov->lov_tgts[index]->ltd_exp);
1949                 if (!osc_obd)
1950                         RETURN(-EINVAL);
1951
1952                 /* copy UUID */
1953                 if (cfs_copy_to_user(data->ioc_pbuf2, obd2cli_tgt(osc_obd),
1954                                      min((int) data->ioc_plen2,
1955                                          (int) sizeof(struct obd_uuid))))
1956                         RETURN(-EFAULT);
1957
1958                 flags = uarg ? *(__u32*)uarg : 0;
1959                 /* got statfs data */
1960                 rc = obd_statfs(NULL, lov->lov_tgts[index]->ltd_exp, &stat_buf,
1961                                 cfs_time_shift_64(-OBD_STATFS_CACHE_SECONDS),
1962                                 flags);
1963                 if (rc)
1964                         RETURN(rc);
1965                 if (cfs_copy_to_user(data->ioc_pbuf1, &stat_buf,
1966                                      min((int) data->ioc_plen1,
1967                                          (int) sizeof(stat_buf))))
1968                         RETURN(-EFAULT);
1969                 break;
1970         }
1971         case OBD_IOC_LOV_GET_CONFIG: {
1972                 struct obd_ioctl_data *data;
1973                 struct lov_desc *desc;
1974                 char *buf = NULL;
1975                 __u32 *genp;
1976
1977                 len = 0;
1978                 if (obd_ioctl_getdata(&buf, &len, (void *)uarg))
1979                         RETURN(-EINVAL);
1980
1981                 data = (struct obd_ioctl_data *)buf;
1982
1983                 if (sizeof(*desc) > data->ioc_inllen1) {
1984                         obd_ioctl_freedata(buf, len);
1985                         RETURN(-EINVAL);
1986                 }
1987
1988                 if (sizeof(uuidp->uuid) * count > data->ioc_inllen2) {
1989                         obd_ioctl_freedata(buf, len);
1990                         RETURN(-EINVAL);
1991                 }
1992
1993                 if (sizeof(__u32) * count > data->ioc_inllen3) {
1994                         obd_ioctl_freedata(buf, len);
1995                         RETURN(-EINVAL);
1996                 }
1997
1998                 desc = (struct lov_desc *)data->ioc_inlbuf1;
1999                 memcpy(desc, &(lov->desc), sizeof(*desc));
2000
2001                 uuidp = (struct obd_uuid *)data->ioc_inlbuf2;
2002                 genp = (__u32 *)data->ioc_inlbuf3;
2003                 /* the uuid will be empty for deleted OSTs */
2004                 for (i = 0; i < count; i++, uuidp++, genp++) {
2005                         if (!lov->lov_tgts[i])
2006                                 continue;
2007                         *uuidp = lov->lov_tgts[i]->ltd_uuid;
2008                         *genp = lov->lov_tgts[i]->ltd_gen;
2009                 }
2010
2011                 if (cfs_copy_to_user((void *)uarg, buf, len))
2012                         rc = -EFAULT;
2013                 obd_ioctl_freedata(buf, len);
2014                 break;
2015         }
2016         case LL_IOC_LOV_SETSTRIPE:
2017                 rc = lov_setstripe(exp, len, karg, uarg);
2018                 break;
2019         case LL_IOC_LOV_GETSTRIPE:
2020                 rc = lov_getstripe(exp, karg, uarg);
2021                 break;
2022         case LL_IOC_LOV_SETEA:
2023                 rc = lov_setea(exp, karg, uarg);
2024                 break;
2025         case OBD_IOC_QUOTACTL: {
2026                 struct if_quotactl *qctl = karg;
2027                 struct lov_tgt_desc *tgt = NULL;
2028                 struct obd_quotactl *oqctl;
2029
2030                 if (qctl->qc_valid == QC_OSTIDX) {
2031                         if (qctl->qc_idx < 0 || count <= qctl->qc_idx)
2032                                 RETURN(-EINVAL);
2033
2034                         tgt = lov->lov_tgts[qctl->qc_idx];
2035                         if (!tgt || !tgt->ltd_exp)
2036                                 RETURN(-EINVAL);
2037                 } else if (qctl->qc_valid == QC_UUID) {
2038                         for (i = 0; i < count; i++) {
2039                                 tgt = lov->lov_tgts[i];
2040                                 if (!tgt ||
2041                                     !obd_uuid_equals(&tgt->ltd_uuid,
2042                                                      &qctl->obd_uuid))
2043                                         continue;
2044
2045                                 if (tgt->ltd_exp == NULL)
2046                                         RETURN(-EINVAL);
2047
2048                                 break;
2049                         }
2050                 } else {
2051                         RETURN(-EINVAL);
2052                 }
2053
2054                 if (i >= count)
2055                         RETURN(-EAGAIN);
2056
2057                 LASSERT(tgt && tgt->ltd_exp);
2058                 OBD_ALLOC_PTR(oqctl);
2059                 if (!oqctl)
2060                         RETURN(-ENOMEM);
2061
2062                 QCTL_COPY(oqctl, qctl);
2063                 rc = obd_quotactl(tgt->ltd_exp, oqctl);
2064                 if (rc == 0) {
2065                         QCTL_COPY(qctl, oqctl);
2066                         qctl->qc_valid = QC_OSTIDX;
2067                         qctl->obd_uuid = tgt->ltd_uuid;
2068                 }
2069                 OBD_FREE_PTR(oqctl);
2070                 break;
2071         }
2072         default: {
2073                 int set = 0;
2074
2075                 if (count == 0)
2076                         RETURN(-ENOTTY);
2077
2078                 for (i = 0; i < count; i++) {
2079                         int err;
2080                         struct obd_device *osc_obd;
2081
2082                         /* OST was disconnected */
2083                         if (!lov->lov_tgts[i] || !lov->lov_tgts[i]->ltd_exp)
2084                                 continue;
2085
2086                         /* ll_umount_begin() sets force flag but for lov, not
2087                          * osc. Let's pass it through */
2088                         osc_obd = class_exp2obd(lov->lov_tgts[i]->ltd_exp);
2089                         osc_obd->obd_force = obddev->obd_force;
2090                         err = obd_iocontrol(cmd, lov->lov_tgts[i]->ltd_exp,
2091                                             len, karg, uarg);
2092                         if (err == -ENODATA && cmd == OBD_IOC_POLL_QUOTACHECK) {
2093                                 RETURN(err);
2094                         } else if (err) {
2095                                 if (lov->lov_tgts[i]->ltd_active) {
2096                                         CDEBUG(err == -ENOTTY ?
2097                                                D_IOCTL : D_WARNING,
2098                                                "iocontrol OSC %s on OST "
2099                                                "idx %d cmd %x: err = %d\n",
2100                                                lov_uuid2str(lov, i),
2101                                                i, cmd, err);
2102                                         if (!rc)
2103                                                 rc = err;
2104                                 }
2105                         } else {
2106                                 set = 1;
2107                         }
2108                 }
2109                 if (!set && !rc)
2110                         rc = -EIO;
2111         }
2112         }
2113
2114         RETURN(rc);
2115 }
2116
2117 #define FIEMAP_BUFFER_SIZE 4096
2118
2119 /**
2120  * Non-zero fe_logical indicates that this is a continuation FIEMAP
2121  * call. The local end offset and the device are sent in the first
2122  * fm_extent. This function calculates the stripe number from the index.
2123  * This function returns a stripe_no on which mapping is to be restarted.
2124  *
2125  * This function returns fm_end_offset which is the in-OST offset at which
2126  * mapping should be restarted. If fm_end_offset=0 is returned then caller
2127  * will re-calculate proper offset in next stripe.
2128  * Note that the first extent is passed to lov_get_info via the value field.
2129  *
2130  * \param fiemap fiemap request header
2131  * \param lsm striping information for the file
2132  * \param fm_start logical start of mapping
2133  * \param fm_end logical end of mapping
2134  * \param start_stripe starting stripe will be returned in this
2135  */
2136 obd_size fiemap_calc_fm_end_offset(struct ll_user_fiemap *fiemap,
2137                                    struct lov_stripe_md *lsm, obd_size fm_start,
2138                                    obd_size fm_end, int *start_stripe)
2139 {
2140         obd_size local_end = fiemap->fm_extents[0].fe_logical;
2141         obd_off lun_start, lun_end;
2142         obd_size fm_end_offset;
2143         int stripe_no = -1, i;
2144
2145         if (fiemap->fm_extent_count == 0 ||
2146             fiemap->fm_extents[0].fe_logical == 0)
2147                 return 0;
2148
2149         /* Find out stripe_no from ost_index saved in the fe_device */
2150         for (i = 0; i < lsm->lsm_stripe_count; i++) {
2151                 if (lsm->lsm_oinfo[i]->loi_ost_idx ==
2152                                         fiemap->fm_extents[0].fe_device) {
2153                         stripe_no = i;
2154                         break;
2155                 }
2156         }
2157         if (stripe_no == -1)
2158                 return -EINVAL;
2159
2160         /* If we have finished mapping on previous device, shift logical
2161          * offset to start of next device */
2162         if ((lov_stripe_intersects(lsm, stripe_no, fm_start, fm_end,
2163                                    &lun_start, &lun_end)) != 0 &&
2164                                    local_end < lun_end) {
2165                 fm_end_offset = local_end;
2166                 *start_stripe = stripe_no;
2167         } else {
2168                 /* This is a special value to indicate that caller should
2169                  * calculate offset in next stripe. */
2170                 fm_end_offset = 0;
2171                 *start_stripe = (stripe_no + 1) % lsm->lsm_stripe_count;
2172         }
2173
2174         return fm_end_offset;
2175 }
2176
2177 /**
2178  * We calculate on which OST the mapping will end. If the length of mapping
2179  * is greater than (stripe_size * stripe_count) then the last_stripe will
2180  * will be one just before start_stripe. Else we check if the mapping
2181  * intersects each OST and find last_stripe.
2182  * This function returns the last_stripe and also sets the stripe_count
2183  * over which the mapping is spread
2184  *
2185  * \param lsm striping information for the file
2186  * \param fm_start logical start of mapping
2187  * \param fm_end logical end of mapping
2188  * \param start_stripe starting stripe of the mapping
2189  * \param stripe_count the number of stripes across which to map is returned
2190  *
2191  * \retval last_stripe return the last stripe of the mapping
2192  */
2193 int fiemap_calc_last_stripe(struct lov_stripe_md *lsm, obd_size fm_start,
2194                             obd_size fm_end, int start_stripe,
2195                             int *stripe_count)
2196 {
2197         int last_stripe;
2198         obd_off obd_start, obd_end;
2199         int i, j;
2200
2201         if (fm_end - fm_start > lsm->lsm_stripe_size * lsm->lsm_stripe_count) {
2202                 last_stripe = (start_stripe < 1 ? lsm->lsm_stripe_count - 1 :
2203                                                               start_stripe - 1);
2204                 *stripe_count = lsm->lsm_stripe_count;
2205         } else {
2206                 for (j = 0, i = start_stripe; j < lsm->lsm_stripe_count;
2207                      i = (i + 1) % lsm->lsm_stripe_count, j++) {
2208                         if ((lov_stripe_intersects(lsm, i, fm_start, fm_end,
2209                                                    &obd_start, &obd_end)) == 0)
2210                                 break;
2211                 }
2212                 *stripe_count = j;
2213                 last_stripe = (start_stripe + j - 1) %lsm->lsm_stripe_count;
2214         }
2215
2216         return last_stripe;
2217 }
2218
2219 /**
2220  * Set fe_device and copy extents from local buffer into main return buffer.
2221  *
2222  * \param fiemap fiemap request header
2223  * \param lcl_fm_ext array of local fiemap extents to be copied
2224  * \param ost_index OST index to be written into the fm_device field for each
2225                     extent
2226  * \param ext_count number of extents to be copied
2227  * \param current_extent where to start copying in main extent array
2228  */
2229 void fiemap_prepare_and_copy_exts(struct ll_user_fiemap *fiemap,
2230                                   struct ll_fiemap_extent *lcl_fm_ext,
2231                                   int ost_index, unsigned int ext_count,
2232                                   int current_extent)
2233 {
2234         char *to;
2235         int ext;
2236
2237         for (ext = 0; ext < ext_count; ext++) {
2238                 lcl_fm_ext[ext].fe_device = ost_index;
2239                 lcl_fm_ext[ext].fe_flags |= FIEMAP_EXTENT_NET;
2240         }
2241
2242         /* Copy fm_extent's from fm_local to return buffer */
2243         to = (char *)fiemap + fiemap_count_to_size(current_extent);
2244         memcpy(to, lcl_fm_ext, ext_count * sizeof(struct ll_fiemap_extent));
2245 }
2246
2247 /**
2248  * Break down the FIEMAP request and send appropriate calls to individual OSTs.
2249  * This also handles the restarting of FIEMAP calls in case mapping overflows
2250  * the available number of extents in single call.
2251  */
2252 static int lov_fiemap(struct lov_obd *lov, __u32 keylen, void *key,
2253                       __u32 *vallen, void *val, struct lov_stripe_md *lsm)
2254 {
2255         struct ll_fiemap_info_key *fm_key = key;
2256         struct ll_user_fiemap *fiemap = val;
2257         struct ll_user_fiemap *fm_local = NULL;
2258         struct ll_fiemap_extent *lcl_fm_ext;
2259         int count_local;
2260         unsigned int get_num_extents = 0;
2261         int ost_index = 0, actual_start_stripe, start_stripe;
2262         obd_size fm_start, fm_end, fm_length, fm_end_offset;
2263         obd_size curr_loc;
2264         int current_extent = 0, rc = 0, i;
2265         int ost_eof = 0; /* EOF for object */
2266         int ost_done = 0; /* done with required mapping for this OST? */
2267         int last_stripe;
2268         int cur_stripe = 0, cur_stripe_wrap = 0, stripe_count;
2269         unsigned int buffer_size = FIEMAP_BUFFER_SIZE;
2270
2271         if (lsm == NULL)
2272                 GOTO(out, rc = 0);
2273
2274         if (fiemap_count_to_size(fm_key->fiemap.fm_extent_count) < buffer_size)
2275                 buffer_size = fiemap_count_to_size(fm_key->fiemap.fm_extent_count);
2276
2277         OBD_ALLOC_LARGE(fm_local, buffer_size);
2278         if (fm_local == NULL)
2279                 GOTO(out, rc = -ENOMEM);
2280         lcl_fm_ext = &fm_local->fm_extents[0];
2281
2282         count_local = fiemap_size_to_count(buffer_size);
2283
2284         memcpy(fiemap, &fm_key->fiemap, sizeof(*fiemap));
2285         fm_start = fiemap->fm_start;
2286         fm_length = fiemap->fm_length;
2287         /* Calculate start stripe, last stripe and length of mapping */
2288         actual_start_stripe = start_stripe = lov_stripe_number(lsm, fm_start);
2289         fm_end = (fm_length == ~0ULL ? fm_key->oa.o_size :
2290                                                 fm_start + fm_length - 1);
2291         /* If fm_length != ~0ULL but fm_start+fm_length-1 exceeds file size */
2292         if (fm_end > fm_key->oa.o_size)
2293                 fm_end = fm_key->oa.o_size;
2294
2295         last_stripe = fiemap_calc_last_stripe(lsm, fm_start, fm_end,
2296                                             actual_start_stripe, &stripe_count);
2297
2298         fm_end_offset = fiemap_calc_fm_end_offset(fiemap, lsm, fm_start,
2299                                                   fm_end, &start_stripe);
2300         if (fm_end_offset == -EINVAL)
2301                 GOTO(out, rc = -EINVAL);
2302
2303         if (fiemap->fm_extent_count == 0) {
2304                 get_num_extents = 1;
2305                 count_local = 0;
2306         }
2307
2308         /* Check each stripe */
2309         for (cur_stripe = start_stripe, i = 0; i < stripe_count;
2310              i++, cur_stripe = (cur_stripe + 1) % lsm->lsm_stripe_count) {
2311                 obd_size req_fm_len; /* Stores length of required mapping */
2312                 obd_size len_mapped_single_call;
2313                 obd_off lun_start, lun_end, obd_object_end;
2314                 unsigned int ext_count;
2315
2316                 cur_stripe_wrap = cur_stripe;
2317
2318                 /* Find out range of mapping on this stripe */
2319                 if ((lov_stripe_intersects(lsm, cur_stripe, fm_start, fm_end,
2320                                            &lun_start, &obd_object_end)) == 0)
2321                         continue;
2322
2323                 /* If this is a continuation FIEMAP call and we are on
2324                  * starting stripe then lun_start needs to be set to
2325                  * fm_end_offset */
2326                 if (fm_end_offset != 0 && cur_stripe == start_stripe)
2327                         lun_start = fm_end_offset;
2328
2329                 if (fm_length != ~0ULL) {
2330                         /* Handle fm_start + fm_length overflow */
2331                         if (fm_start + fm_length < fm_start)
2332                                 fm_length = ~0ULL - fm_start;
2333                         lun_end = lov_size_to_stripe(lsm, fm_start + fm_length,
2334                                                      cur_stripe);
2335                 } else {
2336                         lun_end = ~0ULL;
2337                 }
2338
2339                 if (lun_start == lun_end)
2340                         continue;
2341
2342                 req_fm_len = obd_object_end - lun_start;
2343                 fm_local->fm_length = 0;
2344                 len_mapped_single_call = 0;
2345
2346                 /* If the output buffer is very large and the objects have many
2347                  * extents we may need to loop on a single OST repeatedly */
2348                 ost_eof = 0;
2349                 ost_done = 0;
2350                 do {
2351                         if (get_num_extents == 0) {
2352                                 /* Don't get too many extents. */
2353                                 if (current_extent + count_local >
2354                                     fiemap->fm_extent_count)
2355                                         count_local = fiemap->fm_extent_count -
2356                                                                  current_extent;
2357                         }
2358
2359                         lun_start += len_mapped_single_call;
2360                         fm_local->fm_length = req_fm_len - len_mapped_single_call;
2361                         req_fm_len = fm_local->fm_length;
2362                         fm_local->fm_extent_count = count_local;
2363                         fm_local->fm_mapped_extents = 0;
2364                         fm_local->fm_flags = fiemap->fm_flags;
2365
2366                         fm_key->oa.o_id = lsm->lsm_oinfo[cur_stripe]->loi_id;
2367                         fm_key->oa.o_seq = lsm->lsm_oinfo[cur_stripe]->loi_seq;
2368                         ost_index = lsm->lsm_oinfo[cur_stripe]->loi_ost_idx;
2369
2370                         if (ost_index < 0 || ost_index >=lov->desc.ld_tgt_count)
2371                                 GOTO(out, rc = -EINVAL);
2372
2373                         /* If OST is inactive, return extent with UNKNOWN flag */
2374                         if (!lov->lov_tgts[ost_index]->ltd_active) {
2375                                 fm_local->fm_flags |= FIEMAP_EXTENT_LAST;
2376                                 fm_local->fm_mapped_extents = 1;
2377
2378                                 lcl_fm_ext[0].fe_logical = lun_start;
2379                                 lcl_fm_ext[0].fe_length = obd_object_end -
2380                                                                       lun_start;
2381                                 lcl_fm_ext[0].fe_flags |= FIEMAP_EXTENT_UNKNOWN;
2382
2383                                 goto inactive_tgt;
2384                         }
2385
2386                         fm_local->fm_start = lun_start;
2387                         fm_local->fm_flags &= ~FIEMAP_FLAG_DEVICE_ORDER;
2388                         memcpy(&fm_key->fiemap, fm_local, sizeof(*fm_local));
2389                         *vallen=fiemap_count_to_size(fm_local->fm_extent_count);
2390                         rc = obd_get_info(NULL,
2391                                           lov->lov_tgts[ost_index]->ltd_exp,
2392                                           keylen, key, vallen, fm_local, lsm);
2393                         if (rc != 0)
2394                                 GOTO(out, rc);
2395
2396 inactive_tgt:
2397                         ext_count = fm_local->fm_mapped_extents;
2398                         if (ext_count == 0) {
2399                                 ost_done = 1;
2400                                 /* If last stripe has hole at the end,
2401                                  * then we need to return */
2402                                 if (cur_stripe_wrap == last_stripe) {
2403                                         fiemap->fm_mapped_extents = 0;
2404                                         goto finish;
2405                                 }
2406                                 break;
2407                         }
2408
2409                         /* If we just need num of extents then go to next device */
2410                         if (get_num_extents) {
2411                                 current_extent += ext_count;
2412                                 break;
2413                         }
2414
2415                         len_mapped_single_call = lcl_fm_ext[ext_count-1].fe_logical -
2416                                   lun_start + lcl_fm_ext[ext_count - 1].fe_length;
2417
2418                         /* Have we finished mapping on this device? */
2419                         if (req_fm_len <= len_mapped_single_call)
2420                                 ost_done = 1;
2421
2422                         /* Clear the EXTENT_LAST flag which can be present on
2423                          * last extent */
2424                         if (lcl_fm_ext[ext_count-1].fe_flags & FIEMAP_EXTENT_LAST)
2425                                 lcl_fm_ext[ext_count - 1].fe_flags &=
2426                                                             ~FIEMAP_EXTENT_LAST;
2427
2428                         curr_loc = lov_stripe_size(lsm,
2429                                            lcl_fm_ext[ext_count - 1].fe_logical+
2430                                            lcl_fm_ext[ext_count - 1].fe_length,
2431                                            cur_stripe);
2432                         if (curr_loc >= fm_key->oa.o_size)
2433                                 ost_eof = 1;
2434
2435                         fiemap_prepare_and_copy_exts(fiemap, lcl_fm_ext,
2436                                                      ost_index, ext_count,
2437                                                      current_extent);
2438
2439                         current_extent += ext_count;
2440
2441                         /* Ran out of available extents? */
2442                         if (current_extent >= fiemap->fm_extent_count)
2443                                 goto finish;
2444                 } while (ost_done == 0 && ost_eof == 0);
2445
2446                 if (cur_stripe_wrap == last_stripe)
2447                         goto finish;
2448         }
2449
2450 finish:
2451         /* Indicate that we are returning device offsets unless file just has
2452          * single stripe */
2453         if (lsm->lsm_stripe_count > 1)
2454                 fiemap->fm_flags |= FIEMAP_FLAG_DEVICE_ORDER;
2455
2456         if (get_num_extents)
2457                 goto skip_last_device_calc;
2458
2459         /* Check if we have reached the last stripe and whether mapping for that
2460          * stripe is done. */
2461         if (cur_stripe_wrap == last_stripe) {
2462                 if (ost_done || ost_eof)
2463                         fiemap->fm_extents[current_extent - 1].fe_flags |=
2464                                                              FIEMAP_EXTENT_LAST;
2465         }
2466
2467 skip_last_device_calc:
2468         fiemap->fm_mapped_extents = current_extent;
2469
2470 out:
2471         OBD_FREE_LARGE(fm_local, buffer_size);
2472         return rc;
2473 }
2474
2475 static int lov_get_info(const struct lu_env *env, struct obd_export *exp,
2476                         __u32 keylen, void *key, __u32 *vallen, void *val,
2477                         struct lov_stripe_md *lsm)
2478 {
2479         struct obd_device *obddev = class_exp2obd(exp);
2480         struct lov_obd *lov = &obddev->u.lov;
2481         int i, rc;
2482         ENTRY;
2483
2484         if (!vallen || !val)
2485                 RETURN(-EFAULT);
2486
2487         obd_getref(obddev);
2488
2489         if (KEY_IS(KEY_LOCK_TO_STRIPE)) {
2490                 struct {
2491                         char name[16];
2492                         struct ldlm_lock *lock;
2493                 } *data = key;
2494                 struct ldlm_res_id *res_id = &data->lock->l_resource->lr_name;
2495                 struct lov_oinfo *loi;
2496                 __u32 *stripe = val;
2497
2498                 if (*vallen < sizeof(*stripe))
2499                         GOTO(out, rc = -EFAULT);
2500                 *vallen = sizeof(*stripe);
2501
2502                 /* XXX This is another one of those bits that will need to
2503                  * change if we ever actually support nested LOVs.  It uses
2504                  * the lock's export to find out which stripe it is. */
2505                 /* XXX - it's assumed all the locks for deleted OSTs have
2506                  * been cancelled. Also, the export for deleted OSTs will
2507                  * be NULL and won't match the lock's export. */
2508                 for (i = 0; i < lsm->lsm_stripe_count; i++) {
2509                         loi = lsm->lsm_oinfo[i];
2510                         if (!lov->lov_tgts[loi->loi_ost_idx])
2511                                 continue;
2512                         if (lov->lov_tgts[loi->loi_ost_idx]->ltd_exp ==
2513                             data->lock->l_conn_export &&
2514                             ostid_res_name_eq(&loi->loi_oi, res_id)) {
2515                                 *stripe = i;
2516                                 GOTO(out, rc = 0);
2517                         }
2518                 }
2519                 LDLM_ERROR(data->lock, "lock on inode without such object");
2520                 dump_lsm(D_ERROR, lsm);
2521                 GOTO(out, rc = -ENXIO);
2522         } else if (KEY_IS(KEY_LAST_ID)) {
2523                 struct obd_id_info *info = val;
2524                 __u32 size = sizeof(obd_id);
2525                 struct lov_tgt_desc *tgt;
2526
2527                 LASSERT(*vallen == sizeof(struct obd_id_info));
2528                 tgt = lov->lov_tgts[info->idx];
2529
2530                 if (!tgt || !tgt->ltd_active)
2531                         GOTO(out, rc = -ESRCH);
2532
2533                 rc = obd_get_info(env, tgt->ltd_exp, keylen, key,
2534                                   &size, info->data, NULL);
2535                 GOTO(out, rc = 0);
2536         } else if (KEY_IS(KEY_LOVDESC)) {
2537                 struct lov_desc *desc_ret = val;
2538                 *desc_ret = lov->desc;
2539
2540                 GOTO(out, rc = 0);
2541         } else if (KEY_IS(KEY_FIEMAP)) {
2542                 rc = lov_fiemap(lov, keylen, key, vallen, val, lsm);
2543                 GOTO(out, rc);
2544         } else if (KEY_IS(KEY_CONNECT_FLAG)) {
2545                 struct lov_tgt_desc *tgt;
2546                 __u64 ost_idx = *((__u64*)val);
2547
2548                 LASSERT(*vallen == sizeof(__u64));
2549                 LASSERT(ost_idx < lov->desc.ld_tgt_count);
2550                 tgt = lov->lov_tgts[ost_idx];
2551
2552                 if (!tgt || !tgt->ltd_exp)
2553                         GOTO(out, rc = -ESRCH);
2554
2555                 *((__u64 *)val) = exp_connect_flags(tgt->ltd_exp);
2556                 GOTO(out, rc = 0);
2557         } else if (KEY_IS(KEY_TGT_COUNT)) {
2558                 *((int *)val) = lov->desc.ld_tgt_count;
2559                 GOTO(out, rc = 0);
2560         }
2561
2562         rc = -EINVAL;
2563
2564 out:
2565         obd_putref(obddev);
2566         RETURN(rc);
2567 }
2568
2569 static int lov_set_info_async(const struct lu_env *env, struct obd_export *exp,
2570                               obd_count keylen, void *key, obd_count vallen,
2571                               void *val, struct ptlrpc_request_set *set)
2572 {
2573         struct obd_device *obddev = class_exp2obd(exp);
2574         struct lov_obd *lov = &obddev->u.lov;
2575         obd_count count;
2576         int i, rc = 0, err;
2577         struct lov_tgt_desc *tgt;
2578         unsigned incr, check_uuid,
2579                  do_inactive, no_set;
2580         unsigned next_id = 0,  mds_con = 0, capa = 0;
2581         ENTRY;
2582
2583         incr = check_uuid = do_inactive = no_set = 0;
2584         if (set == NULL) {
2585                 no_set = 1;
2586                 set = ptlrpc_prep_set();
2587                 if (!set)
2588                         RETURN(-ENOMEM);
2589         }
2590
2591         obd_getref(obddev);
2592         count = lov->desc.ld_tgt_count;
2593
2594         if (KEY_IS(KEY_NEXT_ID)) {
2595                 count = vallen / sizeof(struct obd_id_info);
2596                 vallen = sizeof(obd_id);
2597                 incr = sizeof(struct obd_id_info);
2598                 do_inactive = 1;
2599                 next_id = 1;
2600         } else if (KEY_IS(KEY_CHECKSUM)) {
2601                 do_inactive = 1;
2602         } else if (KEY_IS(KEY_EVICT_BY_NID)) {
2603                 /* use defaults:  do_inactive = incr = 0; */
2604         } else if (KEY_IS(KEY_MDS_CONN)) {
2605                 mds_con = 1;
2606         } else if (KEY_IS(KEY_CAPA_KEY)) {
2607                 capa = 1;
2608         } else if (KEY_IS(KEY_CACHE_SET)) {
2609                 LASSERT(lov->lov_cache == NULL);
2610                 lov->lov_cache = val;
2611                 do_inactive = 1;
2612         }
2613
2614         for (i = 0; i < count; i++, val = (char *)val + incr) {
2615                 if (next_id) {
2616                         tgt = lov->lov_tgts[((struct obd_id_info*)val)->idx];
2617                 } else {
2618                         tgt = lov->lov_tgts[i];
2619                 }
2620                 /* OST was disconnected */
2621                 if (!tgt || !tgt->ltd_exp)
2622                         continue;
2623
2624                 /* OST is inactive and we don't want inactive OSCs */
2625                 if (!tgt->ltd_active && !do_inactive)
2626                         continue;
2627
2628                 if (mds_con) {
2629                         struct mds_group_info *mgi;
2630
2631                         LASSERT(vallen == sizeof(*mgi));
2632                         mgi = (struct mds_group_info *)val;
2633
2634                         /* Only want a specific OSC */
2635                         if (mgi->uuid && !obd_uuid_equals(mgi->uuid,
2636                                                 &tgt->ltd_uuid))
2637                                 continue;
2638
2639                         err = obd_set_info_async(env, tgt->ltd_exp,
2640                                          keylen, key, sizeof(int),
2641                                          &mgi->group, set);
2642                 } else if (next_id) {
2643                         err = obd_set_info_async(env, tgt->ltd_exp,
2644                                          keylen, key, vallen,
2645                                          ((struct obd_id_info*)val)->data, set);
2646                 } else if (capa) {
2647                         struct mds_capa_info *info = (struct mds_capa_info*)val;
2648
2649                         LASSERT(vallen == sizeof(*info));
2650
2651                          /* Only want a specific OSC */
2652                         if (info->uuid &&
2653                             !obd_uuid_equals(info->uuid, &tgt->ltd_uuid))
2654                                 continue;
2655
2656                         err = obd_set_info_async(env, tgt->ltd_exp, keylen,
2657                                                  key, sizeof(*info->capa),
2658                                                  info->capa, set);
2659                 } else {
2660                         /* Only want a specific OSC */
2661                         if (check_uuid &&
2662                             !obd_uuid_equals(val, &tgt->ltd_uuid))
2663                                 continue;
2664
2665                         err = obd_set_info_async(env, tgt->ltd_exp,
2666                                          keylen, key, vallen, val, set);
2667                 }
2668
2669                 if (!rc)
2670                         rc = err;
2671         }
2672
2673         obd_putref(obddev);
2674         if (no_set) {
2675                 err = ptlrpc_set_wait(set);
2676                 if (!rc)
2677                         rc = err;
2678                 ptlrpc_set_destroy(set);
2679         }
2680         RETURN(rc);
2681 }
2682
2683 static int lov_extent_calc(struct obd_export *exp, struct lov_stripe_md *lsm,
2684                            int cmd, __u64 *offset)
2685 {
2686         __u32 ssize = lsm->lsm_stripe_size;
2687         __u64 start;
2688
2689         start = *offset;
2690         lov_do_div64(start, ssize);
2691         start = start * ssize;
2692
2693         CDEBUG(D_DLMTRACE, "offset "LPU64", stripe %u, start "LPU64
2694                            ", end "LPU64"\n", *offset, ssize, start,
2695                            start + ssize - 1);
2696         if (cmd == OBD_CALC_STRIPE_END) {
2697                 *offset = start + ssize - 1;
2698         } else if (cmd == OBD_CALC_STRIPE_START) {
2699                 *offset = start;
2700         } else {
2701                 LBUG();
2702         }
2703
2704         RETURN(0);
2705 }
2706
2707 void lov_stripe_lock(struct lov_stripe_md *md)
2708 {
2709         LASSERT(md->lsm_lock_owner != cfs_curproc_pid());
2710         spin_lock(&md->lsm_lock);
2711         LASSERT(md->lsm_lock_owner == 0);
2712         md->lsm_lock_owner = cfs_curproc_pid();
2713 }
2714 EXPORT_SYMBOL(lov_stripe_lock);
2715
2716 void lov_stripe_unlock(struct lov_stripe_md *md)
2717 {
2718         LASSERT(md->lsm_lock_owner == cfs_curproc_pid());
2719         md->lsm_lock_owner = 0;
2720         spin_unlock(&md->lsm_lock);
2721 }
2722 EXPORT_SYMBOL(lov_stripe_unlock);
2723
2724 static int lov_quotactl(struct obd_device *obd, struct obd_export *exp,
2725                         struct obd_quotactl *oqctl)
2726 {
2727         struct lov_obd      *lov = &obd->u.lov;
2728         struct lov_tgt_desc *tgt;
2729         __u64                curspace = 0;
2730         __u64                bhardlimit = 0;
2731         int                  i, rc = 0;
2732         ENTRY;
2733
2734         if (oqctl->qc_cmd != LUSTRE_Q_QUOTAON &&
2735             oqctl->qc_cmd != LUSTRE_Q_QUOTAOFF &&
2736             oqctl->qc_cmd != Q_GETOQUOTA &&
2737             oqctl->qc_cmd != Q_INITQUOTA &&
2738             oqctl->qc_cmd != LUSTRE_Q_SETQUOTA &&
2739             oqctl->qc_cmd != Q_FINVALIDATE) {
2740                 CERROR("bad quota opc %x for lov obd", oqctl->qc_cmd);
2741                 RETURN(-EFAULT);
2742         }
2743
2744         /* for lov tgt */
2745         obd_getref(obd);
2746         for (i = 0; i < lov->desc.ld_tgt_count; i++) {
2747                 int err;
2748
2749                 tgt = lov->lov_tgts[i];
2750
2751                 if (!tgt)
2752                         continue;
2753
2754                 if (!tgt->ltd_active || tgt->ltd_reap) {
2755                         if (oqctl->qc_cmd == Q_GETOQUOTA &&
2756                             lov->lov_tgts[i]->ltd_activate) {
2757                                 rc = -EREMOTEIO;
2758                                 CERROR("ost %d is inactive\n", i);
2759                         } else {
2760                                 CDEBUG(D_HA, "ost %d is inactive\n", i);
2761                         }
2762                         continue;
2763                 }
2764
2765                 err = obd_quotactl(tgt->ltd_exp, oqctl);
2766                 if (err) {
2767                         if (tgt->ltd_active && !rc)
2768                                 rc = err;
2769                         continue;
2770                 }
2771
2772                 if (oqctl->qc_cmd == Q_GETOQUOTA) {
2773                         curspace += oqctl->qc_dqblk.dqb_curspace;
2774                         bhardlimit += oqctl->qc_dqblk.dqb_bhardlimit;
2775                 }
2776         }
2777         obd_putref(obd);
2778
2779         if (oqctl->qc_cmd == Q_GETOQUOTA) {
2780                 oqctl->qc_dqblk.dqb_curspace = curspace;
2781                 oqctl->qc_dqblk.dqb_bhardlimit = bhardlimit;
2782         }
2783         RETURN(rc);
2784 }
2785
2786 static int lov_quotacheck(struct obd_device *obd, struct obd_export *exp,
2787                           struct obd_quotactl *oqctl)
2788 {
2789         struct lov_obd *lov = &obd->u.lov;
2790         int             i, rc = 0;
2791         ENTRY;
2792
2793         obd_getref(obd);
2794
2795         for (i = 0; i < lov->desc.ld_tgt_count; i++) {
2796                 if (!lov->lov_tgts[i])
2797                         continue;
2798
2799                 /* Skip quota check on the administratively disabled OSTs. */
2800                 if (!lov->lov_tgts[i]->ltd_activate) {
2801                         CWARN("lov idx %d was administratively disabled, "
2802                               "skip quotacheck on it.\n", i);
2803                         continue;
2804                 }
2805
2806                 if (!lov->lov_tgts[i]->ltd_active) {
2807                         CERROR("lov idx %d inactive\n", i);
2808                         rc = -EIO;
2809                         goto out;
2810                 }
2811         }
2812
2813         for (i = 0; i < lov->desc.ld_tgt_count; i++) {
2814                 int err;
2815
2816                 if (!lov->lov_tgts[i] || !lov->lov_tgts[i]->ltd_activate)
2817                         continue;
2818
2819                 err = obd_quotacheck(lov->lov_tgts[i]->ltd_exp, oqctl);
2820                 if (err && !rc)
2821                         rc = err;
2822         }
2823
2824 out:
2825         obd_putref(obd);
2826
2827         RETURN(rc);
2828 }
2829
2830 struct obd_ops lov_obd_ops = {
2831         .o_owner               = THIS_MODULE,
2832         .o_setup               = lov_setup,
2833         .o_precleanup          = lov_precleanup,
2834         .o_cleanup             = lov_cleanup,
2835         //.o_process_config      = lov_process_config,
2836         .o_connect             = lov_connect,
2837         .o_disconnect          = lov_disconnect,
2838         .o_statfs              = lov_statfs,
2839         .o_statfs_async        = lov_statfs_async,
2840         .o_packmd              = lov_packmd,
2841         .o_unpackmd            = lov_unpackmd,
2842         .o_create              = lov_create,
2843         .o_destroy             = lov_destroy,
2844         .o_getattr             = lov_getattr,
2845         .o_getattr_async       = lov_getattr_async,
2846         .o_setattr             = lov_setattr,
2847         .o_setattr_async       = lov_setattr_async,
2848         .o_brw                 = lov_brw,
2849         .o_merge_lvb           = lov_merge_lvb,
2850         .o_adjust_kms          = lov_adjust_kms,
2851         .o_punch               = lov_punch,
2852         .o_sync                = lov_sync,
2853         .o_enqueue             = lov_enqueue,
2854         .o_change_cbdata       = lov_change_cbdata,
2855         .o_find_cbdata         = lov_find_cbdata,
2856         .o_cancel              = lov_cancel,
2857         .o_cancel_unused       = lov_cancel_unused,
2858         .o_iocontrol           = lov_iocontrol,
2859         .o_get_info            = lov_get_info,
2860         .o_set_info_async      = lov_set_info_async,
2861         .o_extent_calc         = lov_extent_calc,
2862         .o_llog_init           = lov_llog_init,
2863         .o_llog_finish         = lov_llog_finish,
2864         .o_notify              = lov_notify,
2865         .o_pool_new            = lov_pool_new,
2866         .o_pool_rem            = lov_pool_remove,
2867         .o_pool_add            = lov_pool_add,
2868         .o_pool_del            = lov_pool_del,
2869         .o_getref              = lov_getref,
2870         .o_putref              = lov_putref,
2871         .o_quotactl            = lov_quotactl,
2872         .o_quotacheck          = lov_quotacheck,
2873 };
2874
2875 cfs_mem_cache_t *lov_oinfo_slab;
2876
2877 extern struct lu_kmem_descr lov_caches[];
2878
2879 int __init lov_init(void)
2880 {
2881         struct lprocfs_static_vars lvars = { 0 };
2882         int rc, rc2;
2883         ENTRY;
2884
2885         /* print an address of _any_ initialized kernel symbol from this
2886          * module, to allow debugging with gdb that doesn't support data
2887          * symbols from modules.*/
2888         CDEBUG(D_INFO, "Lustre LOV module (%p).\n", &lov_caches);
2889
2890         rc = lu_kmem_init(lov_caches);
2891         if (rc)
2892                 return rc;
2893
2894         lov_oinfo_slab = cfs_mem_cache_create("lov_oinfo",
2895                                               sizeof(struct lov_oinfo),
2896                                               0, CFS_SLAB_HWCACHE_ALIGN);
2897         if (lov_oinfo_slab == NULL) {
2898                 lu_kmem_fini(lov_caches);
2899                 return -ENOMEM;
2900         }
2901         lprocfs_lov_init_vars(&lvars);
2902
2903         rc = class_register_type(&lov_obd_ops, NULL, lvars.module_vars,
2904                                  LUSTRE_LOV_NAME, &lov_device_type);
2905
2906         if (rc) {
2907                 rc2 = cfs_mem_cache_destroy(lov_oinfo_slab);
2908                 LASSERT(rc2 == 0);
2909                 lu_kmem_fini(lov_caches);
2910         }
2911
2912         RETURN(rc);
2913 }
2914
2915 #ifdef __KERNEL__
2916 static void /*__exit*/ lov_exit(void)
2917 {
2918         int rc;
2919
2920         class_unregister_type(LUSTRE_LOV_NAME);
2921         rc = cfs_mem_cache_destroy(lov_oinfo_slab);
2922         LASSERT(rc == 0);
2923
2924         lu_kmem_fini(lov_caches);
2925 }
2926
2927 MODULE_AUTHOR("Sun Microsystems, Inc. <http://www.lustre.org/>");
2928 MODULE_DESCRIPTION("Lustre Logical Object Volume OBD driver");
2929 MODULE_LICENSE("GPL");
2930
2931 cfs_module(lov, LUSTRE_VERSION_STRING, lov_init, lov_exit);
2932 #endif