lustre/lov/lov_request.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) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
  28  * Use is subject to license terms.
  29  *
  30  * Copyright (c) 2011, 2013, 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
  37 #define DEBUG_SUBSYSTEM S_LOV
  38
  39 #ifdef __KERNEL__
  40 #include <libcfs/libcfs.h>
  41 #else
  42 #include <liblustre.h>
  43 #endif
  44
  45 #include <obd_class.h>
  46 #include <obd_lov.h>
  47 #include <obd_ost.h>
  48 #include <lustre/lustre_idl.h>
  49
  50 #include "lov_internal.h"
  51
  52 static void lov_init_set(struct lov_request_set *set)
  53 {
  54         set->set_count = 0;
  55         cfs_atomic_set(&set->set_completes, 0);
  56         cfs_atomic_set(&set->set_success, 0);
  57         cfs_atomic_set(&set->set_finish_checked, 0);
  58         set->set_cookies = 0;
  59         CFS_INIT_LIST_HEAD(&set->set_list);
  60         cfs_atomic_set(&set->set_refcount, 1);
  61         init_waitqueue_head(&set->set_waitq);
  62         spin_lock_init(&set->set_lock);
  63 }
  64
  65 void lov_finish_set(struct lov_request_set *set)
  66 {
  67         cfs_list_t *pos, *n;
  68         ENTRY;
  69
  70         LASSERT(set);
  71         cfs_list_for_each_safe(pos, n, &set->set_list) {
  72                 struct lov_request *req = cfs_list_entry(pos,
  73                                                          struct lov_request,
  74                                                          rq_link);
  75                 cfs_list_del_init(&req->rq_link);
  76
  77                 if (req->rq_oi.oi_oa)
  78                         OBDO_FREE(req->rq_oi.oi_oa);
  79                 if (req->rq_oi.oi_md)
  80                         OBD_FREE_LARGE(req->rq_oi.oi_md, req->rq_buflen);
  81                 if (req->rq_oi.oi_osfs)
  82                         OBD_FREE(req->rq_oi.oi_osfs,
  83                                  sizeof(*req->rq_oi.oi_osfs));
  84                 OBD_FREE(req, sizeof(*req));
  85         }
  86
  87         if (set->set_pga) {
  88                 int len = set->set_oabufs * sizeof(*set->set_pga);
  89                 OBD_FREE_LARGE(set->set_pga, len);
  90         }
  91         if (set->set_lockh)
  92                 lov_llh_put(set->set_lockh);
  93
  94         OBD_FREE(set, sizeof(*set));
  95         EXIT;
  96 }
  97
  98 int lov_set_finished(struct lov_request_set *set, int idempotent)
  99 {
 100         int completes = cfs_atomic_read(&set->set_completes);
 101
 102         CDEBUG(D_INFO, "check set %d/%d\n", completes, set->set_count);
 103
 104         if (completes == set->set_count) {
 105                 if (idempotent)
 106                         return 1;
 107                 if (cfs_atomic_inc_return(&set->set_finish_checked) == 1)
 108                         return 1;
 109         }
 110         return 0;
 111 }
 112
 113 void lov_update_set(struct lov_request_set *set,
 114                     struct lov_request *req, int rc)
 115 {
 116         req->rq_complete = 1;
 117         req->rq_rc = rc;
 118
 119         cfs_atomic_inc(&set->set_completes);
 120         if (rc == 0)
 121                 cfs_atomic_inc(&set->set_success);
 122
 123         wake_up(&set->set_waitq);
 124 }
 125
 126 int lov_update_common_set(struct lov_request_set *set,
 127                           struct lov_request *req, int rc)
 128 {
 129         struct lov_obd *lov = &set->set_exp->exp_obd->u.lov;
 130         ENTRY;
 131
 132         lov_update_set(set, req, rc);
 133
 134         /* grace error on inactive ost */
 135         if (rc && !(lov->lov_tgts[req->rq_idx] &&
 136                     lov->lov_tgts[req->rq_idx]->ltd_active))
 137                 rc = 0;
 138
 139         /* FIXME in raid1 regime, should return 0 */
 140         RETURN(rc);
 141 }
 142
 143 void lov_set_add_req(struct lov_request *req, struct lov_request_set *set)
 144 {
 145         cfs_list_add_tail(&req->rq_link, &set->set_list);
 146         set->set_count++;
 147         req->rq_rqset = set;
 148 }
 149
 150 static int lov_check_set(struct lov_obd *lov, int idx)
 151 {
 152         int rc = 0;
 153         mutex_lock(&lov->lov_lock);
 154
 155         if (lov->lov_tgts[idx] == NULL ||
 156             lov->lov_tgts[idx]->ltd_active ||
 157             (lov->lov_tgts[idx]->ltd_exp != NULL &&
 158              class_exp2cliimp(lov->lov_tgts[idx]->ltd_exp)->imp_connect_tried))
 159                 rc = 1;
 160
 161         mutex_unlock(&lov->lov_lock);
 162         return rc;
 163 }
 164
 165 /* Check if the OSC connection exists and is active.
 166  * If the OSC has not yet had a chance to connect to the OST the first time,
 167  * wait once for it to connect instead of returning an error.
 168  */
 169 int lov_check_and_wait_active(struct lov_obd *lov, int ost_idx)
 170 {
 171         wait_queue_head_t waitq;
 172         struct l_wait_info lwi;
 173         struct lov_tgt_desc *tgt;
 174         int rc = 0;
 175
 176         mutex_lock(&lov->lov_lock);
 177
 178         tgt = lov->lov_tgts[ost_idx];
 179
 180         if (unlikely(tgt == NULL))
 181                 GOTO(out, rc = 0);
 182
 183         if (likely(tgt->ltd_active))
 184                 GOTO(out, rc = 1);
 185
 186         if (tgt->ltd_exp && class_exp2cliimp(tgt->ltd_exp)->imp_connect_tried)
 187                 GOTO(out, rc = 0);
 188
 189         mutex_unlock(&lov->lov_lock);
 190
 191         init_waitqueue_head(&waitq);
 192         lwi = LWI_TIMEOUT_INTERVAL(cfs_time_seconds(obd_timeout),
 193                                    cfs_time_seconds(1), NULL, NULL);
 194
 195         rc = l_wait_event(waitq, lov_check_set(lov, ost_idx), &lwi);
 196         if (tgt->ltd_active)
 197                 return 1;
 198
 199         return 0;
 200
 201 out:
 202         mutex_unlock(&lov->lov_lock);
 203         return rc;
 204 }
 205
 206 static int lov_update_enqueue_lov(struct obd_export *exp,
 207                                   struct lustre_handle *lov_lockhp,
 208                                   struct lov_oinfo *loi, __u64 flags, int idx,
 209                                   struct ost_id *oi, int rc)
 210 {
 211         struct lov_obd *lov = &exp->exp_obd->u.lov;
 212
 213         if (rc != ELDLM_OK &&
 214             !(rc == ELDLM_LOCK_ABORTED && (flags & LDLM_FL_HAS_INTENT))) {
 215                 memset(lov_lockhp, 0, sizeof(*lov_lockhp));
 216                 if (lov->lov_tgts[idx] && lov->lov_tgts[idx]->ltd_active) {
 217                         /* -EUSERS used by OST to report file contention */
 218                         if (rc != -EINTR && rc != -EUSERS)
 219                                 CERROR("%s: enqueue objid "DOSTID" subobj"
 220                                        DOSTID" on OST idx %d: rc %d\n",
 221                                        exp->exp_obd->obd_name,
 222                                        POSTID(oi), POSTID(&loi->loi_oi),
 223                                        loi->loi_ost_idx, rc);
 224                 } else
 225                         rc = ELDLM_OK;
 226         }
 227         return rc;
 228 }
 229
 230 int lov_update_enqueue_set(struct lov_request *req, __u32 mode, int rc)
 231 {
 232         struct lov_request_set *set = req->rq_rqset;
 233         struct lustre_handle *lov_lockhp;
 234         struct obd_info *oi = set->set_oi;
 235         struct lov_oinfo *loi;
 236         ENTRY;
 237
 238         LASSERT(oi != NULL);
 239
 240         lov_lockhp = set->set_lockh->llh_handles + req->rq_stripe;
 241         loi = oi->oi_md->lsm_oinfo[req->rq_stripe];
 242
 243         /* XXX LOV STACKING: OSC gets a copy, created in lov_prep_enqueue_set
 244          * and that copy can be arbitrarily out of date.
 245          *
 246          * The LOV API is due for a serious rewriting anyways, and this
 247          * can be addressed then. */
 248
 249         lov_stripe_lock(oi->oi_md);
 250         osc_update_enqueue(lov_lockhp, loi, oi->oi_flags,
 251                            &req->rq_oi.oi_md->lsm_oinfo[0]->loi_lvb, mode, rc);
 252         if (rc == ELDLM_LOCK_ABORTED && (oi->oi_flags & LDLM_FL_HAS_INTENT))
 253                 memset(lov_lockhp, 0, sizeof *lov_lockhp);
 254         rc = lov_update_enqueue_lov(set->set_exp, lov_lockhp, loi, oi->oi_flags,
 255                                     req->rq_idx, &oi->oi_md->lsm_oi, rc);
 256         lov_stripe_unlock(oi->oi_md);
 257         lov_update_set(set, req, rc);
 258         RETURN(rc);
 259 }
 260
 261 /* The callback for osc_enqueue that updates lov info for every OSC request. */
 262 static int cb_update_enqueue(void *cookie, int rc)
 263 {
 264         struct obd_info *oinfo = cookie;
 265         struct ldlm_enqueue_info *einfo;
 266         struct lov_request *lovreq;
 267
 268         lovreq = container_of(oinfo, struct lov_request, rq_oi);
 269         einfo = lovreq->rq_rqset->set_ei;
 270         return lov_update_enqueue_set(lovreq, einfo->ei_mode, rc);
 271 }
 272
 273 static int enqueue_done(struct lov_request_set *set, __u32 mode)
 274 {
 275         struct lov_request *req;
 276         struct lov_obd *lov = &set->set_exp->exp_obd->u.lov;
 277         int completes = cfs_atomic_read(&set->set_completes);
 278         int rc = 0;
 279         ENTRY;
 280
 281         /* enqueue/match success, just return */
 282         if (completes && completes == cfs_atomic_read(&set->set_success))
 283                 RETURN(0);
 284
 285         /* cancel enqueued/matched locks */
 286         cfs_list_for_each_entry(req, &set->set_list, rq_link) {
 287                 struct lustre_handle *lov_lockhp;
 288
 289                 if (!req->rq_complete || req->rq_rc)
 290                         continue;
 291
 292                 lov_lockhp = set->set_lockh->llh_handles + req->rq_stripe;
 293                 LASSERT(lov_lockhp);
 294                 if (!lustre_handle_is_used(lov_lockhp))
 295                         continue;
 296
 297                 rc = obd_cancel(lov->lov_tgts[req->rq_idx]->ltd_exp,
 298                                 req->rq_oi.oi_md, mode, lov_lockhp);
 299                 if (rc && lov->lov_tgts[req->rq_idx] &&
 300                     lov->lov_tgts[req->rq_idx]->ltd_active)
 301                         CERROR("%s: cancelling obdjid "DOSTID" on OST"
 302                                "idx %d error: rc = %d\n",
 303                                set->set_exp->exp_obd->obd_name,
 304                                POSTID(&req->rq_oi.oi_md->lsm_oi),
 305                                req->rq_idx, rc);
 306         }
 307         if (set->set_lockh)
 308                 lov_llh_put(set->set_lockh);
 309         RETURN(rc);
 310 }
 311
 312 int lov_fini_enqueue_set(struct lov_request_set *set, __u32 mode, int rc,
 313                          struct ptlrpc_request_set *rqset)
 314 {
 315         int ret = 0;
 316         ENTRY;
 317
 318         if (set == NULL)
 319                 RETURN(0);
 320         LASSERT(set->set_exp);
 321         /* Do enqueue_done only for sync requests and if any request
 322          * succeeded. */
 323         if (!rqset) {
 324                 if (rc)
 325                         cfs_atomic_set(&set->set_completes, 0);
 326                 ret = enqueue_done(set, mode);
 327         } else if (set->set_lockh)
 328                 lov_llh_put(set->set_lockh);
 329
 330         lov_put_reqset(set);
 331
 332         RETURN(rc ? rc : ret);
 333 }
 334
 335 static void lov_llh_addref(void *llhp)
 336 {
 337         struct lov_lock_handles *llh = llhp;
 338
 339         cfs_atomic_inc(&llh->llh_refcount);
 340         CDEBUG(D_INFO, "GETting llh %p : new refcount %d\n", llh,
 341                cfs_atomic_read(&llh->llh_refcount));
 342 }
 343
 344 static struct portals_handle_ops lov_handle_ops = {
 345         .hop_addref = lov_llh_addref,
 346         .hop_free   = NULL,
 347 };
 348
 349 static struct lov_lock_handles *lov_llh_new(struct lov_stripe_md *lsm)
 350 {
 351         struct lov_lock_handles *llh;
 352
 353         OBD_ALLOC(llh, sizeof *llh +
 354                   sizeof(*llh->llh_handles) * lsm->lsm_stripe_count);
 355         if (llh == NULL)
 356                 return NULL;
 357
 358         cfs_atomic_set(&llh->llh_refcount, 2);
 359         llh->llh_stripe_count = lsm->lsm_stripe_count;
 360         CFS_INIT_LIST_HEAD(&llh->llh_handle.h_link);
 361         class_handle_hash(&llh->llh_handle, &lov_handle_ops);
 362
 363         return llh;
 364 }
 365
 366 int lov_prep_enqueue_set(struct obd_export *exp, struct obd_info *oinfo,
 367                          struct ldlm_enqueue_info *einfo,
 368                          struct lov_request_set **reqset)
 369 {
 370         struct lov_obd *lov = &exp->exp_obd->u.lov;
 371         struct lov_request_set *set;
 372         int i, rc = 0;
 373         ENTRY;
 374
 375         OBD_ALLOC(set, sizeof(*set));
 376         if (set == NULL)
 377                 RETURN(-ENOMEM);
 378         lov_init_set(set);
 379
 380         set->set_exp = exp;
 381         set->set_oi = oinfo;
 382         set->set_ei = einfo;
 383         set->set_lockh = lov_llh_new(oinfo->oi_md);
 384         if (set->set_lockh == NULL)
 385                 GOTO(out_set, rc = -ENOMEM);
 386         oinfo->oi_lockh->cookie = set->set_lockh->llh_handle.h_cookie;
 387
 388         for (i = 0; i < oinfo->oi_md->lsm_stripe_count; i++) {
 389                 struct lov_oinfo *loi;
 390                 struct lov_request *req;
 391                 obd_off start, end;
 392
 393                 loi = oinfo->oi_md->lsm_oinfo[i];
 394                 if (!lov_stripe_intersects(oinfo->oi_md, i,
 395                                            oinfo->oi_policy.l_extent.start,
 396                                            oinfo->oi_policy.l_extent.end,
 397                                            &start, &end))
 398                         continue;
 399
 400                 if (!lov_check_and_wait_active(lov, loi->loi_ost_idx)) {
 401                         CDEBUG(D_HA, "lov idx %d inactive\n", loi->loi_ost_idx);
 402                         continue;
 403                 }
 404
 405                 OBD_ALLOC(req, sizeof(*req));
 406                 if (req == NULL)
 407                         GOTO(out_set, rc = -ENOMEM);
 408
 409                 req->rq_buflen = sizeof(*req->rq_oi.oi_md) +
 410                         sizeof(struct lov_oinfo *) +
 411                         sizeof(struct lov_oinfo);
 412                 OBD_ALLOC_LARGE(req->rq_oi.oi_md, req->rq_buflen);
 413                 if (req->rq_oi.oi_md == NULL) {
 414                         OBD_FREE(req, sizeof(*req));
 415                         GOTO(out_set, rc = -ENOMEM);
 416                 }
 417                 req->rq_oi.oi_md->lsm_oinfo[0] =
 418                         ((void *)req->rq_oi.oi_md) + sizeof(*req->rq_oi.oi_md) +
 419                         sizeof(struct lov_oinfo *);
 420
 421                 /* Set lov request specific parameters. */
 422                 req->rq_oi.oi_lockh = set->set_lockh->llh_handles + i;
 423                 req->rq_oi.oi_cb_up = cb_update_enqueue;
 424                 req->rq_oi.oi_flags = oinfo->oi_flags;
 425
 426                 LASSERT(req->rq_oi.oi_lockh);
 427
 428                 req->rq_oi.oi_policy.l_extent.gid =
 429                         oinfo->oi_policy.l_extent.gid;
 430                 req->rq_oi.oi_policy.l_extent.start = start;
 431                 req->rq_oi.oi_policy.l_extent.end = end;
 432
 433                 req->rq_idx = loi->loi_ost_idx;
 434                 req->rq_stripe = i;
 435
 436                 /* XXX LOV STACKING: submd should be from the subobj */
 437                 req->rq_oi.oi_md->lsm_oi = loi->loi_oi;
 438                 req->rq_oi.oi_md->lsm_stripe_count = 0;
 439                 req->rq_oi.oi_md->lsm_oinfo[0]->loi_kms_valid =
 440                         loi->loi_kms_valid;
 441                 req->rq_oi.oi_md->lsm_oinfo[0]->loi_kms = loi->loi_kms;
 442                 req->rq_oi.oi_md->lsm_oinfo[0]->loi_lvb = loi->loi_lvb;
 443
 444                 lov_set_add_req(req, set);
 445         }
 446         if (!set->set_count)
 447                 GOTO(out_set, rc = -EIO);
 448         *reqset = set;
 449         RETURN(0);
 450 out_set:
 451         lov_fini_enqueue_set(set, einfo->ei_mode, rc, NULL);
 452         RETURN(rc);
 453 }
 454
 455 int lov_fini_match_set(struct lov_request_set *set, __u32 mode, __u64 flags)
 456 {
 457         int rc = 0;
 458         ENTRY;
 459
 460         if (set == NULL)
 461                 RETURN(0);
 462         LASSERT(set->set_exp);
 463         rc = enqueue_done(set, mode);
 464         if ((set->set_count == cfs_atomic_read(&set->set_success)) &&
 465             (flags & LDLM_FL_TEST_LOCK))
 466                 lov_llh_put(set->set_lockh);
 467
 468         lov_put_reqset(set);
 469
 470         RETURN(rc);
 471 }
 472
 473 int lov_prep_match_set(struct obd_export *exp, struct obd_info *oinfo,
 474                        struct lov_stripe_md *lsm, ldlm_policy_data_t *policy,
 475                        __u32 mode, struct lustre_handle *lockh,
 476                        struct lov_request_set **reqset)
 477 {
 478         struct lov_obd *lov = &exp->exp_obd->u.lov;
 479         struct lov_request_set *set;
 480         int i, rc = 0;
 481         ENTRY;
 482
 483         OBD_ALLOC(set, sizeof(*set));
 484         if (set == NULL)
 485                 RETURN(-ENOMEM);
 486         lov_init_set(set);
 487
 488         set->set_exp = exp;
 489         set->set_oi = oinfo;
 490         set->set_oi->oi_md = lsm;
 491         set->set_lockh = lov_llh_new(lsm);
 492         if (set->set_lockh == NULL)
 493                 GOTO(out_set, rc = -ENOMEM);
 494         lockh->cookie = set->set_lockh->llh_handle.h_cookie;
 495
 496         for (i = 0; i < lsm->lsm_stripe_count; i++){
 497                 struct lov_oinfo *loi;
 498                 struct lov_request *req;
 499                 obd_off start, end;
 500
 501                 loi = lsm->lsm_oinfo[i];
 502                 if (!lov_stripe_intersects(lsm, i, policy->l_extent.start,
 503                                            policy->l_extent.end, &start, &end))
 504                         continue;
 505
 506                 /* FIXME raid1 should grace this error */
 507                 if (!lov_check_and_wait_active(lov, loi->loi_ost_idx)) {
 508                         CDEBUG(D_HA, "lov idx %d inactive\n", loi->loi_ost_idx);
 509                         GOTO(out_set, rc = -EIO);
 510                 }
 511
 512                 OBD_ALLOC(req, sizeof(*req));
 513                 if (req == NULL)
 514                         GOTO(out_set, rc = -ENOMEM);
 515
 516                 req->rq_buflen = sizeof(*req->rq_oi.oi_md);
 517                 OBD_ALLOC_LARGE(req->rq_oi.oi_md, req->rq_buflen);
 518                 if (req->rq_oi.oi_md == NULL) {
 519                         OBD_FREE(req, sizeof(*req));
 520                         GOTO(out_set, rc = -ENOMEM);
 521                 }
 522
 523                 req->rq_oi.oi_policy.l_extent.start = start;
 524                 req->rq_oi.oi_policy.l_extent.end = end;
 525                 req->rq_oi.oi_policy.l_extent.gid = policy->l_extent.gid;
 526
 527                 req->rq_idx = loi->loi_ost_idx;
 528                 req->rq_stripe = i;
 529
 530                 /* XXX LOV STACKING: submd should be from the subobj */
 531                 req->rq_oi.oi_md->lsm_oi = loi->loi_oi;
 532                 req->rq_oi.oi_md->lsm_stripe_count = 0;
 533
 534                 lov_set_add_req(req, set);
 535         }
 536         if (!set->set_count)
 537                 GOTO(out_set, rc = -EIO);
 538         *reqset = set;
 539         RETURN(rc);
 540 out_set:
 541         lov_fini_match_set(set, mode, 0);
 542         RETURN(rc);
 543 }
 544
 545 int lov_fini_cancel_set(struct lov_request_set *set)
 546 {
 547         int rc = 0;
 548         ENTRY;
 549
 550         if (set == NULL)
 551                 RETURN(0);
 552
 553         LASSERT(set->set_exp);
 554         if (set->set_lockh)
 555                 lov_llh_put(set->set_lockh);
 556
 557         lov_put_reqset(set);
 558
 559         RETURN(rc);
 560 }
 561
 562 int lov_prep_cancel_set(struct obd_export *exp, struct obd_info *oinfo,
 563                         struct lov_stripe_md *lsm, __u32 mode,
 564                         struct lustre_handle *lockh,
 565                         struct lov_request_set **reqset)
 566 {
 567         struct lov_request_set *set;
 568         int i, rc = 0;
 569         ENTRY;
 570
 571         OBD_ALLOC(set, sizeof(*set));
 572         if (set == NULL)
 573                 RETURN(-ENOMEM);
 574         lov_init_set(set);
 575
 576         set->set_exp = exp;
 577         set->set_oi = oinfo;
 578         set->set_oi->oi_md = lsm;
 579         set->set_lockh = lov_handle2llh(lockh);
 580         if (set->set_lockh == NULL) {
 581                 CERROR("LOV: invalid lov lock handle %p\n", lockh);
 582                 GOTO(out_set, rc = -EINVAL);
 583         }
 584         lockh->cookie = set->set_lockh->llh_handle.h_cookie;
 585
 586         for (i = 0; i < lsm->lsm_stripe_count; i++){
 587                 struct lov_request *req;
 588                 struct lustre_handle *lov_lockhp;
 589                 struct lov_oinfo *loi = lsm->lsm_oinfo[i];
 590
 591                 lov_lockhp = set->set_lockh->llh_handles + i;
 592                 if (!lustre_handle_is_used(lov_lockhp)) {
 593                         CDEBUG(D_INFO, "lov idx %d subobj "DOSTID" no lock\n",
 594                                loi->loi_ost_idx, POSTID(&loi->loi_oi));
 595                         continue;
 596                 }
 597
 598                 OBD_ALLOC(req, sizeof(*req));
 599                 if (req == NULL)
 600                         GOTO(out_set, rc = -ENOMEM);
 601
 602                 req->rq_buflen = sizeof(*req->rq_oi.oi_md);
 603                 OBD_ALLOC_LARGE(req->rq_oi.oi_md, req->rq_buflen);
 604                 if (req->rq_oi.oi_md == NULL) {
 605                         OBD_FREE(req, sizeof(*req));
 606                         GOTO(out_set, rc = -ENOMEM);
 607                 }
 608
 609                 req->rq_idx = loi->loi_ost_idx;
 610                 req->rq_stripe = i;
 611
 612                 /* XXX LOV STACKING: submd should be from the subobj */
 613                 req->rq_oi.oi_md->lsm_oi = loi->loi_oi;
 614                 req->rq_oi.oi_md->lsm_stripe_count = 0;
 615
 616                 lov_set_add_req(req, set);
 617         }
 618         if (!set->set_count)
 619                 GOTO(out_set, rc = -EIO);
 620         *reqset = set;
 621         RETURN(rc);
 622 out_set:
 623         lov_fini_cancel_set(set);
 624         RETURN(rc);
 625 }
 626 static int common_attr_done(struct lov_request_set *set)
 627 {
 628         cfs_list_t *pos;
 629         struct lov_request *req;
 630         struct obdo *tmp_oa;
 631         int rc = 0, attrset = 0;
 632         ENTRY;
 633
 634         LASSERT(set->set_oi != NULL);
 635
 636         if (set->set_oi->oi_oa == NULL)
 637                 RETURN(0);
 638
 639         if (!cfs_atomic_read(&set->set_success))
 640                 RETURN(-EIO);
 641
 642         OBDO_ALLOC(tmp_oa);
 643         if (tmp_oa == NULL)
 644                 GOTO(out, rc = -ENOMEM);
 645
 646         cfs_list_for_each (pos, &set->set_list) {
 647                 req = cfs_list_entry(pos, struct lov_request, rq_link);
 648
 649                 if (!req->rq_complete || req->rq_rc)
 650                         continue;
 651                 if (req->rq_oi.oi_oa->o_valid == 0)   /* inactive stripe */
 652                         continue;
 653                 lov_merge_attrs(tmp_oa, req->rq_oi.oi_oa,
 654                                 req->rq_oi.oi_oa->o_valid,
 655                                 set->set_oi->oi_md, req->rq_stripe, &attrset);
 656         }
 657         if (!attrset) {
 658                 CERROR("No stripes had valid attrs\n");
 659                 rc = -EIO;
 660         }
 661         if ((set->set_oi->oi_oa->o_valid & OBD_MD_FLEPOCH) &&
 662             (set->set_oi->oi_md->lsm_stripe_count != attrset)) {
 663                 /* When we take attributes of some epoch, we require all the
 664                  * ost to be active. */
 665                 CERROR("Not all the stripes had valid attrs\n");
 666                 GOTO(out, rc = -EIO);
 667         }
 668
 669         tmp_oa->o_oi = set->set_oi->oi_oa->o_oi;
 670         memcpy(set->set_oi->oi_oa, tmp_oa, sizeof(*set->set_oi->oi_oa));
 671 out:
 672         if (tmp_oa)
 673                 OBDO_FREE(tmp_oa);
 674         RETURN(rc);
 675
 676 }
 677
 678 static int brw_done(struct lov_request_set *set)
 679 {
 680         struct lov_stripe_md *lsm = set->set_oi->oi_md;
 681         struct lov_oinfo     *loi = NULL;
 682         cfs_list_t *pos;
 683         struct lov_request *req;
 684         ENTRY;
 685
 686         cfs_list_for_each (pos, &set->set_list) {
 687                 req = cfs_list_entry(pos, struct lov_request, rq_link);
 688
 689                 if (!req->rq_complete || req->rq_rc)
 690                         continue;
 691
 692                 loi = lsm->lsm_oinfo[req->rq_stripe];
 693
 694                 if (req->rq_oi.oi_oa->o_valid & OBD_MD_FLBLOCKS)
 695                         loi->loi_lvb.lvb_blocks = req->rq_oi.oi_oa->o_blocks;
 696         }
 697
 698         RETURN(0);
 699 }
 700
 701 int lov_fini_brw_set(struct lov_request_set *set)
 702 {
 703         int rc = 0;
 704         ENTRY;
 705
 706         if (set == NULL)
 707                 RETURN(0);
 708         LASSERT(set->set_exp);
 709         if (cfs_atomic_read(&set->set_completes)) {
 710                 rc = brw_done(set);
 711                 /* FIXME update qos data here */
 712         }
 713         lov_put_reqset(set);
 714
 715         RETURN(rc);
 716 }
 717
 718 int lov_prep_brw_set(struct obd_export *exp, struct obd_info *oinfo,
 719                      obd_count oa_bufs, struct brw_page *pga,
 720                      struct obd_trans_info *oti,
 721                      struct lov_request_set **reqset)
 722 {
 723         struct {
 724                 obd_count       index;
 725                 obd_count       count;
 726                 obd_count       off;
 727         } *info = NULL;
 728         struct lov_request_set *set;
 729         struct lov_obd *lov = &exp->exp_obd->u.lov;
 730         int rc = 0, i, shift;
 731         ENTRY;
 732
 733         OBD_ALLOC(set, sizeof(*set));
 734         if (set == NULL)
 735                 RETURN(-ENOMEM);
 736         lov_init_set(set);
 737
 738         set->set_exp = exp;
 739         set->set_oti = oti;
 740         set->set_oi = oinfo;
 741         set->set_oabufs = oa_bufs;
 742         OBD_ALLOC_LARGE(set->set_pga, oa_bufs * sizeof(*set->set_pga));
 743         if (!set->set_pga)
 744                 GOTO(out, rc = -ENOMEM);
 745
 746         OBD_ALLOC_LARGE(info, sizeof(*info) * oinfo->oi_md->lsm_stripe_count);
 747         if (!info)
 748                 GOTO(out, rc = -ENOMEM);
 749
 750         /* calculate the page count for each stripe */
 751         for (i = 0; i < oa_bufs; i++) {
 752                 int stripe = lov_stripe_number(oinfo->oi_md, pga[i].off);
 753                 info[stripe].count++;
 754         }
 755
 756         /* alloc and initialize lov request */
 757         shift = 0;
 758         for (i = 0; i < oinfo->oi_md->lsm_stripe_count; i++){
 759                 struct lov_oinfo *loi = NULL;
 760                 struct lov_request *req;
 761
 762                 if (info[i].count == 0)
 763                         continue;
 764
 765                 loi = oinfo->oi_md->lsm_oinfo[i];
 766                 if (!lov_check_and_wait_active(lov, loi->loi_ost_idx)) {
 767                         CDEBUG(D_HA, "lov idx %d inactive\n", loi->loi_ost_idx);
 768                         GOTO(out, rc = -EIO);
 769                 }
 770
 771                 OBD_ALLOC(req, sizeof(*req));
 772                 if (req == NULL)
 773                         GOTO(out, rc = -ENOMEM);
 774
 775                 OBDO_ALLOC(req->rq_oi.oi_oa);
 776                 if (req->rq_oi.oi_oa == NULL) {
 777                         OBD_FREE(req, sizeof(*req));
 778                         GOTO(out, rc = -ENOMEM);
 779                 }
 780
 781                 if (oinfo->oi_oa) {
 782                         memcpy(req->rq_oi.oi_oa, oinfo->oi_oa,
 783                                sizeof(*req->rq_oi.oi_oa));
 784                 }
 785                 req->rq_oi.oi_oa->o_oi = loi->loi_oi;
 786                 req->rq_oi.oi_oa->o_stripe_idx = i;
 787
 788                 req->rq_buflen = sizeof(*req->rq_oi.oi_md);
 789                 OBD_ALLOC_LARGE(req->rq_oi.oi_md, req->rq_buflen);
 790                 if (req->rq_oi.oi_md == NULL) {
 791                         OBDO_FREE(req->rq_oi.oi_oa);
 792                         OBD_FREE(req, sizeof(*req));
 793                         GOTO(out, rc = -ENOMEM);
 794                 }
 795
 796                 req->rq_idx = loi->loi_ost_idx;
 797                 req->rq_stripe = i;
 798
 799                 /* XXX LOV STACKING */
 800                 req->rq_oi.oi_md->lsm_oi = loi->loi_oi;
 801                 req->rq_oabufs = info[i].count;
 802                 req->rq_pgaidx = shift;
 803                 shift += req->rq_oabufs;
 804
 805                 /* remember the index for sort brw_page array */
 806                 info[i].index = req->rq_pgaidx;
 807
 808                 req->rq_oi.oi_capa = oinfo->oi_capa;
 809
 810                 lov_set_add_req(req, set);
 811         }
 812         if (!set->set_count)
 813                 GOTO(out, rc = -EIO);
 814
 815         /* rotate & sort the brw_page array */
 816         for (i = 0; i < oa_bufs; i++) {
 817                 int stripe = lov_stripe_number(oinfo->oi_md, pga[i].off);
 818
 819                 shift = info[stripe].index + info[stripe].off;
 820                 LASSERT(shift < oa_bufs);
 821                 set->set_pga[shift] = pga[i];
 822                 lov_stripe_offset(oinfo->oi_md, pga[i].off, stripe,
 823                                   &set->set_pga[shift].off);
 824                 info[stripe].off++;
 825         }
 826 out:
 827         if (info)
 828                 OBD_FREE_LARGE(info,
 829                                sizeof(*info) * oinfo->oi_md->lsm_stripe_count);
 830
 831         if (rc == 0)
 832                 *reqset = set;
 833         else
 834                 lov_fini_brw_set(set);
 835
 836         RETURN(rc);
 837 }
 838
 839 int lov_fini_getattr_set(struct lov_request_set *set)
 840 {
 841         int rc = 0;
 842         ENTRY;
 843
 844         if (set == NULL)
 845                 RETURN(0);
 846         LASSERT(set->set_exp);
 847         if (cfs_atomic_read(&set->set_completes))
 848                 rc = common_attr_done(set);
 849
 850         lov_put_reqset(set);
 851
 852         RETURN(rc);
 853 }
 854
 855 /* The callback for osc_getattr_async that finilizes a request info when a
 856  * response is received. */
 857 static int cb_getattr_update(void *cookie, int rc)
 858 {
 859         struct obd_info *oinfo = cookie;
 860         struct lov_request *lovreq;
 861         lovreq = container_of(oinfo, struct lov_request, rq_oi);
 862         return lov_update_common_set(lovreq->rq_rqset, lovreq, rc);
 863 }
 864
 865 int lov_prep_getattr_set(struct obd_export *exp, struct obd_info *oinfo,
 866                          struct lov_request_set **reqset)
 867 {
 868         struct lov_request_set *set;
 869         struct lov_obd *lov = &exp->exp_obd->u.lov;
 870         int rc = 0, i;
 871         ENTRY;
 872
 873         OBD_ALLOC(set, sizeof(*set));
 874         if (set == NULL)
 875                 RETURN(-ENOMEM);
 876         lov_init_set(set);
 877
 878         set->set_exp = exp;
 879         set->set_oi = oinfo;
 880
 881         for (i = 0; i < oinfo->oi_md->lsm_stripe_count; i++) {
 882                 struct lov_oinfo *loi;
 883                 struct lov_request *req;
 884
 885                 loi = oinfo->oi_md->lsm_oinfo[i];
 886                 if (!lov_check_and_wait_active(lov, loi->loi_ost_idx)) {
 887                         CDEBUG(D_HA, "lov idx %d inactive\n", loi->loi_ost_idx);
 888                         if (oinfo->oi_oa->o_valid & OBD_MD_FLEPOCH)
 889                                 /* SOM requires all the OSTs to be active. */
 890                                 GOTO(out_set, rc = -EIO);
 891                         continue;
 892                 }
 893
 894                 OBD_ALLOC(req, sizeof(*req));
 895                 if (req == NULL)
 896                         GOTO(out_set, rc = -ENOMEM);
 897
 898                 req->rq_stripe = i;
 899                 req->rq_idx = loi->loi_ost_idx;
 900
 901                 OBDO_ALLOC(req->rq_oi.oi_oa);
 902                 if (req->rq_oi.oi_oa == NULL) {
 903                         OBD_FREE(req, sizeof(*req));
 904                         GOTO(out_set, rc = -ENOMEM);
 905                 }
 906                 memcpy(req->rq_oi.oi_oa, oinfo->oi_oa,
 907                        sizeof(*req->rq_oi.oi_oa));
 908                 req->rq_oi.oi_oa->o_oi = loi->loi_oi;
 909                 req->rq_oi.oi_cb_up = cb_getattr_update;
 910                 req->rq_oi.oi_capa = oinfo->oi_capa;
 911
 912                 lov_set_add_req(req, set);
 913         }
 914         if (!set->set_count)
 915                 GOTO(out_set, rc = -EIO);
 916         *reqset = set;
 917         RETURN(rc);
 918 out_set:
 919         lov_fini_getattr_set(set);
 920         RETURN(rc);
 921 }
 922
 923 int lov_fini_destroy_set(struct lov_request_set *set)
 924 {
 925         ENTRY;
 926
 927         if (set == NULL)
 928                 RETURN(0);
 929         LASSERT(set->set_exp);
 930         if (cfs_atomic_read(&set->set_completes)) {
 931                 /* FIXME update qos data here */
 932         }
 933
 934         lov_put_reqset(set);
 935
 936         RETURN(0);
 937 }
 938
 939 int lov_prep_destroy_set(struct obd_export *exp, struct obd_info *oinfo,
 940                          struct obdo *src_oa, struct lov_stripe_md *lsm,
 941                          struct obd_trans_info *oti,
 942                          struct lov_request_set **reqset)
 943 {
 944         struct lov_request_set *set;
 945         struct lov_obd *lov = &exp->exp_obd->u.lov;
 946         int rc = 0, i;
 947         ENTRY;
 948
 949         OBD_ALLOC(set, sizeof(*set));
 950         if (set == NULL)
 951                 RETURN(-ENOMEM);
 952         lov_init_set(set);
 953
 954         set->set_exp = exp;
 955         set->set_oi = oinfo;
 956         set->set_oi->oi_md = lsm;
 957         set->set_oi->oi_oa = src_oa;
 958         set->set_oti = oti;
 959         if (oti != NULL && src_oa->o_valid & OBD_MD_FLCOOKIE)
 960                 set->set_cookies = oti->oti_logcookies;
 961
 962         for (i = 0; i < lsm->lsm_stripe_count; i++) {
 963                 struct lov_oinfo *loi;
 964                 struct lov_request *req;
 965
 966                 loi = lsm->lsm_oinfo[i];
 967                 if (!lov_check_and_wait_active(lov, loi->loi_ost_idx)) {
 968                         CDEBUG(D_HA, "lov idx %d inactive\n", loi->loi_ost_idx);
 969                         continue;
 970                 }
 971
 972                 OBD_ALLOC(req, sizeof(*req));
 973                 if (req == NULL)
 974                         GOTO(out_set, rc = -ENOMEM);
 975
 976                 req->rq_stripe = i;
 977                 req->rq_idx = loi->loi_ost_idx;
 978
 979                 OBDO_ALLOC(req->rq_oi.oi_oa);
 980                 if (req->rq_oi.oi_oa == NULL) {
 981                         OBD_FREE(req, sizeof(*req));
 982                         GOTO(out_set, rc = -ENOMEM);
 983                 }
 984                 memcpy(req->rq_oi.oi_oa, src_oa, sizeof(*req->rq_oi.oi_oa));
 985                 req->rq_oi.oi_oa->o_oi = loi->loi_oi;
 986                 lov_set_add_req(req, set);
 987         }
 988         if (!set->set_count)
 989                 GOTO(out_set, rc = -EIO);
 990         *reqset = set;
 991         RETURN(rc);
 992 out_set:
 993         lov_fini_destroy_set(set);
 994         RETURN(rc);
 995 }
 996
 997 int lov_fini_setattr_set(struct lov_request_set *set)
 998 {
 999         int rc = 0;
1000         ENTRY;
1001
1002         if (set == NULL)
1003                 RETURN(0);
1004         LASSERT(set->set_exp);
1005         if (cfs_atomic_read(&set->set_completes)) {
1006                 rc = common_attr_done(set);
1007                 /* FIXME update qos data here */
1008         }
1009
1010         lov_put_reqset(set);
1011         RETURN(rc);
1012 }
1013
1014 int lov_update_setattr_set(struct lov_request_set *set,
1015                            struct lov_request *req, int rc)
1016 {
1017         struct lov_obd *lov = &req->rq_rqset->set_exp->exp_obd->u.lov;
1018         struct lov_stripe_md *lsm = req->rq_rqset->set_oi->oi_md;
1019         ENTRY;
1020
1021         lov_update_set(set, req, rc);
1022
1023         /* grace error on inactive ost */
1024         if (rc && !(lov->lov_tgts[req->rq_idx] &&
1025                     lov->lov_tgts[req->rq_idx]->ltd_active))
1026                 rc = 0;
1027
1028         if (rc == 0) {
1029                 if (req->rq_oi.oi_oa->o_valid & OBD_MD_FLCTIME)
1030                         lsm->lsm_oinfo[req->rq_stripe]->loi_lvb.lvb_ctime =
1031                                 req->rq_oi.oi_oa->o_ctime;
1032                 if (req->rq_oi.oi_oa->o_valid & OBD_MD_FLMTIME)
1033                         lsm->lsm_oinfo[req->rq_stripe]->loi_lvb.lvb_mtime =
1034                                 req->rq_oi.oi_oa->o_mtime;
1035                 if (req->rq_oi.oi_oa->o_valid & OBD_MD_FLATIME)
1036                         lsm->lsm_oinfo[req->rq_stripe]->loi_lvb.lvb_atime =
1037                                 req->rq_oi.oi_oa->o_atime;
1038         }
1039
1040         RETURN(rc);
1041 }
1042
1043 /* The callback for osc_setattr_async that finilizes a request info when a
1044  * response is received. */
1045 static int cb_setattr_update(void *cookie, int rc)
1046 {
1047         struct obd_info *oinfo = cookie;
1048         struct lov_request *lovreq;
1049         lovreq = container_of(oinfo, struct lov_request, rq_oi);
1050         return lov_update_setattr_set(lovreq->rq_rqset, lovreq, rc);
1051 }
1052
1053 int lov_prep_setattr_set(struct obd_export *exp, struct obd_info *oinfo,
1054                          struct obd_trans_info *oti,
1055                          struct lov_request_set **reqset)
1056 {
1057         struct lov_request_set *set;
1058         struct lov_obd *lov = &exp->exp_obd->u.lov;
1059         int rc = 0, i;
1060         ENTRY;
1061
1062         OBD_ALLOC(set, sizeof(*set));
1063         if (set == NULL)
1064                 RETURN(-ENOMEM);
1065         lov_init_set(set);
1066
1067         set->set_exp = exp;
1068         set->set_oti = oti;
1069         set->set_oi = oinfo;
1070         if (oti != NULL && oinfo->oi_oa->o_valid & OBD_MD_FLCOOKIE)
1071                 set->set_cookies = oti->oti_logcookies;
1072
1073         for (i = 0; i < oinfo->oi_md->lsm_stripe_count; i++) {
1074                 struct lov_oinfo *loi = oinfo->oi_md->lsm_oinfo[i];
1075                 struct lov_request *req;
1076
1077                 if (!lov_check_and_wait_active(lov, loi->loi_ost_idx)) {
1078                         CDEBUG(D_HA, "lov idx %d inactive\n", loi->loi_ost_idx);
1079                         continue;
1080                 }
1081
1082                 OBD_ALLOC(req, sizeof(*req));
1083                 if (req == NULL)
1084                         GOTO(out_set, rc = -ENOMEM);
1085                 req->rq_stripe = i;
1086                 req->rq_idx = loi->loi_ost_idx;
1087
1088                 OBDO_ALLOC(req->rq_oi.oi_oa);
1089                 if (req->rq_oi.oi_oa == NULL) {
1090                         OBD_FREE(req, sizeof(*req));
1091                         GOTO(out_set, rc = -ENOMEM);
1092                 }
1093                 memcpy(req->rq_oi.oi_oa, oinfo->oi_oa,
1094                        sizeof(*req->rq_oi.oi_oa));
1095                 req->rq_oi.oi_oa->o_oi = loi->loi_oi;
1096                 req->rq_oi.oi_oa->o_stripe_idx = i;
1097                 req->rq_oi.oi_cb_up = cb_setattr_update;
1098                 req->rq_oi.oi_capa = oinfo->oi_capa;
1099
1100                 if (oinfo->oi_oa->o_valid & OBD_MD_FLSIZE) {
1101                         int off = lov_stripe_offset(oinfo->oi_md,
1102                                                     oinfo->oi_oa->o_size, i,
1103                                                     &req->rq_oi.oi_oa->o_size);
1104
1105                         if (off < 0 && req->rq_oi.oi_oa->o_size)
1106                                 req->rq_oi.oi_oa->o_size--;
1107
1108                         CDEBUG(D_INODE, "stripe %d has size "LPU64"/"LPU64"\n",
1109                                i, req->rq_oi.oi_oa->o_size,
1110                                oinfo->oi_oa->o_size);
1111                 }
1112                 lov_set_add_req(req, set);
1113         }
1114         if (!set->set_count)
1115                 GOTO(out_set, rc = -EIO);
1116         *reqset = set;
1117         RETURN(rc);
1118 out_set:
1119         lov_fini_setattr_set(set);
1120         RETURN(rc);
1121 }
1122
1123 int lov_fini_punch_set(struct lov_request_set *set)
1124 {
1125         int rc = 0;
1126         ENTRY;
1127
1128         if (set == NULL)
1129                 RETURN(0);
1130         LASSERT(set->set_exp);
1131         if (cfs_atomic_read(&set->set_completes)) {
1132                 rc = -EIO;
1133                 /* FIXME update qos data here */
1134                 if (cfs_atomic_read(&set->set_success))
1135                         rc = common_attr_done(set);
1136         }
1137
1138         lov_put_reqset(set);
1139
1140         RETURN(rc);
1141 }
1142
1143 int lov_update_punch_set(struct lov_request_set *set,
1144                          struct lov_request *req, int rc)
1145 {
1146         struct lov_obd *lov = &req->rq_rqset->set_exp->exp_obd->u.lov;
1147         struct lov_stripe_md *lsm = req->rq_rqset->set_oi->oi_md;
1148         ENTRY;
1149
1150         lov_update_set(set, req, rc);
1151
1152         /* grace error on inactive ost */
1153         if (rc && !lov->lov_tgts[req->rq_idx]->ltd_active)
1154                 rc = 0;
1155
1156         if (rc == 0) {
1157                 lov_stripe_lock(lsm);
1158                 if (req->rq_oi.oi_oa->o_valid & OBD_MD_FLBLOCKS) {
1159                         lsm->lsm_oinfo[req->rq_stripe]->loi_lvb.lvb_blocks =
1160                                 req->rq_oi.oi_oa->o_blocks;
1161                 }
1162
1163                 lov_stripe_unlock(lsm);
1164         }
1165
1166         RETURN(rc);
1167 }
1168
1169 /* The callback for osc_punch that finilizes a request info when a response
1170  * is received. */
1171 static int cb_update_punch(void *cookie, int rc)
1172 {
1173         struct obd_info *oinfo = cookie;
1174         struct lov_request *lovreq;
1175         lovreq = container_of(oinfo, struct lov_request, rq_oi);
1176         return lov_update_punch_set(lovreq->rq_rqset, lovreq, rc);
1177 }
1178
1179 int lov_prep_punch_set(struct obd_export *exp, struct obd_info *oinfo,
1180                        struct obd_trans_info *oti,
1181                        struct lov_request_set **reqset)
1182 {
1183         struct lov_request_set *set;
1184         struct lov_obd *lov = &exp->exp_obd->u.lov;
1185         int rc = 0, i;
1186         ENTRY;
1187
1188         OBD_ALLOC(set, sizeof(*set));
1189         if (set == NULL)
1190                 RETURN(-ENOMEM);
1191         lov_init_set(set);
1192
1193         set->set_oi = oinfo;
1194         set->set_exp = exp;
1195
1196         for (i = 0; i < oinfo->oi_md->lsm_stripe_count; i++) {
1197                 struct lov_oinfo *loi = oinfo->oi_md->lsm_oinfo[i];
1198                 struct lov_request *req;
1199                 obd_off rs, re;
1200
1201                 if (!lov_stripe_intersects(oinfo->oi_md, i,
1202                                            oinfo->oi_policy.l_extent.start,
1203                                            oinfo->oi_policy.l_extent.end,
1204                                            &rs, &re))
1205                         continue;
1206
1207                 if (!lov_check_and_wait_active(lov, loi->loi_ost_idx)) {
1208                         CDEBUG(D_HA, "lov idx %d inactive\n", loi->loi_ost_idx);
1209                         GOTO(out_set, rc = -EIO);
1210                 }
1211
1212                 OBD_ALLOC(req, sizeof(*req));
1213                 if (req == NULL)
1214                         GOTO(out_set, rc = -ENOMEM);
1215                 req->rq_stripe = i;
1216                 req->rq_idx = loi->loi_ost_idx;
1217
1218                 OBDO_ALLOC(req->rq_oi.oi_oa);
1219                 if (req->rq_oi.oi_oa == NULL) {
1220                         OBD_FREE(req, sizeof(*req));
1221                         GOTO(out_set, rc = -ENOMEM);
1222                 }
1223                 memcpy(req->rq_oi.oi_oa, oinfo->oi_oa,
1224                        sizeof(*req->rq_oi.oi_oa));
1225                 req->rq_oi.oi_oa->o_oi = loi->loi_oi;
1226                 req->rq_oi.oi_oa->o_valid |= OBD_MD_FLGROUP;
1227
1228                 req->rq_oi.oi_oa->o_stripe_idx = i;
1229                 req->rq_oi.oi_cb_up = cb_update_punch;
1230
1231                 req->rq_oi.oi_policy.l_extent.start = rs;
1232                 req->rq_oi.oi_policy.l_extent.end = re;
1233                 req->rq_oi.oi_policy.l_extent.gid = -1;
1234
1235                 req->rq_oi.oi_capa = oinfo->oi_capa;
1236
1237                 lov_set_add_req(req, set);
1238         }
1239         if (!set->set_count)
1240                 GOTO(out_set, rc = -EIO);
1241         *reqset = set;
1242         RETURN(rc);
1243 out_set:
1244         lov_fini_punch_set(set);
1245         RETURN(rc);
1246 }
1247
1248 int lov_fini_sync_set(struct lov_request_set *set)
1249 {
1250         int rc = 0;
1251         ENTRY;
1252
1253         if (set == NULL)
1254                 RETURN(0);
1255         LASSERT(set->set_exp);
1256         if (cfs_atomic_read(&set->set_completes)) {
1257                 if (!cfs_atomic_read(&set->set_success))
1258                         rc = -EIO;
1259                 /* FIXME update qos data here */
1260         }
1261
1262         lov_put_reqset(set);
1263
1264         RETURN(rc);
1265 }
1266
1267 /* The callback for osc_sync that finilizes a request info when a
1268  * response is recieved. */
1269 static int cb_sync_update(void *cookie, int rc)
1270 {
1271         struct obd_info *oinfo = cookie;
1272         struct lov_request *lovreq;
1273
1274         lovreq = container_of(oinfo, struct lov_request, rq_oi);
1275         return lov_update_common_set(lovreq->rq_rqset, lovreq, rc);
1276 }
1277
1278 int lov_prep_sync_set(struct obd_export *exp, struct obd_info *oinfo,
1279                       obd_off start, obd_off end,
1280                       struct lov_request_set **reqset)
1281 {
1282         struct lov_request_set *set;
1283         struct lov_obd *lov = &exp->exp_obd->u.lov;
1284         int rc = 0, i;
1285         ENTRY;
1286
1287         OBD_ALLOC_PTR(set);
1288         if (set == NULL)
1289                 RETURN(-ENOMEM);
1290         lov_init_set(set);
1291
1292         set->set_exp = exp;
1293         set->set_oi = oinfo;
1294
1295         for (i = 0; i < oinfo->oi_md->lsm_stripe_count; i++) {
1296                 struct lov_oinfo *loi = oinfo->oi_md->lsm_oinfo[i];
1297                 struct lov_request *req;
1298                 obd_off rs, re;
1299
1300                 if (!lov_check_and_wait_active(lov, loi->loi_ost_idx)) {
1301                         CDEBUG(D_HA, "lov idx %d inactive\n", loi->loi_ost_idx);
1302                         continue;
1303                 }
1304
1305                 if (!lov_stripe_intersects(oinfo->oi_md, i, start, end, &rs,
1306                                            &re))
1307                         continue;
1308
1309                 OBD_ALLOC_PTR(req);
1310                 if (req == NULL)
1311                         GOTO(out_set, rc = -ENOMEM);
1312                 req->rq_stripe = i;
1313                 req->rq_idx = loi->loi_ost_idx;
1314
1315                 OBDO_ALLOC(req->rq_oi.oi_oa);
1316                 if (req->rq_oi.oi_oa == NULL) {
1317                         OBD_FREE(req, sizeof(*req));
1318                         GOTO(out_set, rc = -ENOMEM);
1319                 }
1320                 *req->rq_oi.oi_oa = *oinfo->oi_oa;
1321                 req->rq_oi.oi_oa->o_oi = loi->loi_oi;
1322                 req->rq_oi.oi_oa->o_stripe_idx = i;
1323
1324                 req->rq_oi.oi_policy.l_extent.start = rs;
1325                 req->rq_oi.oi_policy.l_extent.end = re;
1326                 req->rq_oi.oi_policy.l_extent.gid = -1;
1327                 req->rq_oi.oi_cb_up = cb_sync_update;
1328
1329                 lov_set_add_req(req, set);
1330         }
1331         if (!set->set_count)
1332                 GOTO(out_set, rc = -EIO);
1333         *reqset = set;
1334         RETURN(rc);
1335 out_set:
1336         lov_fini_sync_set(set);
1337         RETURN(rc);
1338 }
1339
1340 #define LOV_U64_MAX ((__u64)~0ULL)
1341 #define LOV_SUM_MAX(tot, add)                                           \
1342         do {                                                            \
1343                 if ((tot) + (add) < (tot))                              \
1344                         (tot) = LOV_U64_MAX;                            \
1345                 else                                                    \
1346                         (tot) += (add);                                 \
1347         } while(0)
1348
1349 int lov_fini_statfs(struct obd_device *obd, struct obd_statfs *osfs,int success)
1350 {
1351         ENTRY;
1352
1353         if (success) {
1354                 __u32 expected_stripes = lov_get_stripecnt(&obd->u.lov,
1355                                                            LOV_MAGIC, 0);
1356                 if (osfs->os_files != LOV_U64_MAX)
1357                         lov_do_div64(osfs->os_files, expected_stripes);
1358                 if (osfs->os_ffree != LOV_U64_MAX)
1359                         lov_do_div64(osfs->os_ffree, expected_stripes);
1360
1361                 spin_lock(&obd->obd_osfs_lock);
1362                 memcpy(&obd->obd_osfs, osfs, sizeof(*osfs));
1363                 obd->obd_osfs_age = cfs_time_current_64();
1364                 spin_unlock(&obd->obd_osfs_lock);
1365                 RETURN(0);
1366         }
1367
1368         RETURN(-EIO);
1369 }
1370
1371 int lov_fini_statfs_set(struct lov_request_set *set)
1372 {
1373         int rc = 0;
1374         ENTRY;
1375
1376         if (set == NULL)
1377                 RETURN(0);
1378
1379         if (cfs_atomic_read(&set->set_completes)) {
1380                 rc = lov_fini_statfs(set->set_obd, set->set_oi->oi_osfs,
1381                                      cfs_atomic_read(&set->set_success));
1382         }
1383         lov_put_reqset(set);
1384         RETURN(rc);
1385 }
1386
1387 void lov_update_statfs(struct obd_statfs *osfs, struct obd_statfs *lov_sfs,
1388                        int success)
1389 {
1390         int shift = 0, quit = 0;
1391         __u64 tmp;
1392
1393         if (success == 0) {
1394                 memcpy(osfs, lov_sfs, sizeof(*lov_sfs));
1395         } else {
1396                 if (osfs->os_bsize != lov_sfs->os_bsize) {
1397                         /* assume all block sizes are always powers of 2 */
1398                         /* get the bits difference */
1399                         tmp = osfs->os_bsize | lov_sfs->os_bsize;
1400                         for (shift = 0; shift <= 64; ++shift) {
1401                                 if (tmp & 1) {
1402                                         if (quit)
1403                                                 break;
1404                                         else
1405                                                 quit = 1;
1406                                         shift = 0;
1407                                 }
1408                                 tmp >>= 1;
1409                         }
1410                 }
1411
1412                 if (osfs->os_bsize < lov_sfs->os_bsize) {
1413                         osfs->os_bsize = lov_sfs->os_bsize;
1414
1415                         osfs->os_bfree  >>= shift;
1416                         osfs->os_bavail >>= shift;
1417                         osfs->os_blocks >>= shift;
1418                 } else if (shift != 0) {
1419                         lov_sfs->os_bfree  >>= shift;
1420                         lov_sfs->os_bavail >>= shift;
1421                         lov_sfs->os_blocks >>= shift;
1422                 }
1423 #ifdef MIN_DF
1424                 /* Sandia requested that df (and so, statfs) only
1425                    returned minimal available space on
1426                    a single OST, so people would be able to
1427                    write this much data guaranteed. */
1428                 if (osfs->os_bavail > lov_sfs->os_bavail) {
1429                         /* Presumably if new bavail is smaller,
1430                            new bfree is bigger as well */
1431                         osfs->os_bfree = lov_sfs->os_bfree;
1432                         osfs->os_bavail = lov_sfs->os_bavail;
1433                 }
1434 #else
1435                 osfs->os_bfree += lov_sfs->os_bfree;
1436                 osfs->os_bavail += lov_sfs->os_bavail;
1437 #endif
1438                 osfs->os_blocks += lov_sfs->os_blocks;
1439                 /* XXX not sure about this one - depends on policy.
1440                  *   - could be minimum if we always stripe on all OBDs
1441                  *     (but that would be wrong for any other policy,
1442                  *     if one of the OBDs has no more objects left)
1443                  *   - could be sum if we stripe whole objects
1444                  *   - could be average, just to give a nice number
1445                  *
1446                  * To give a "reasonable" (if not wholly accurate)
1447                  * number, we divide the total number of free objects
1448                  * by expected stripe count (watch out for overflow).
1449                  */
1450                 LOV_SUM_MAX(osfs->os_files, lov_sfs->os_files);
1451                 LOV_SUM_MAX(osfs->os_ffree, lov_sfs->os_ffree);
1452         }
1453 }
1454
1455 /* The callback for osc_statfs_async that finilizes a request info when a
1456  * response is received. */
1457 static int cb_statfs_update(void *cookie, int rc)
1458 {
1459         struct obd_info *oinfo = cookie;
1460         struct lov_request *lovreq;
1461         struct lov_request_set *set;
1462         struct obd_statfs *osfs, *lov_sfs;
1463         struct lov_obd *lov;
1464         struct lov_tgt_desc *tgt;
1465         struct obd_device *lovobd, *tgtobd;
1466         int success;
1467         ENTRY;
1468
1469         lovreq = container_of(oinfo, struct lov_request, rq_oi);
1470         set = lovreq->rq_rqset;
1471         lovobd = set->set_obd;
1472         lov = &lovobd->u.lov;
1473         osfs = set->set_oi->oi_osfs;
1474         lov_sfs = oinfo->oi_osfs;
1475         success = cfs_atomic_read(&set->set_success);
1476         /* XXX: the same is done in lov_update_common_set, however
1477            lovset->set_exp is not initialized. */
1478         lov_update_set(set, lovreq, rc);
1479         if (rc)
1480                 GOTO(out, rc);
1481
1482         obd_getref(lovobd);
1483         tgt = lov->lov_tgts[lovreq->rq_idx];
1484         if (!tgt || !tgt->ltd_active)
1485                 GOTO(out_update, rc);
1486
1487         tgtobd = class_exp2obd(tgt->ltd_exp);
1488         spin_lock(&tgtobd->obd_osfs_lock);
1489         memcpy(&tgtobd->obd_osfs, lov_sfs, sizeof(*lov_sfs));
1490         if ((oinfo->oi_flags & OBD_STATFS_FROM_CACHE) == 0)
1491                 tgtobd->obd_osfs_age = cfs_time_current_64();
1492         spin_unlock(&tgtobd->obd_osfs_lock);
1493
1494 out_update:
1495         lov_update_statfs(osfs, lov_sfs, success);
1496         obd_putref(lovobd);
1497
1498 out:
1499         if (set->set_oi->oi_flags & OBD_STATFS_PTLRPCD &&
1500             lov_set_finished(set, 0)) {
1501                 lov_statfs_interpret(NULL, set, set->set_count !=
1502                                      cfs_atomic_read(&set->set_success));
1503         }
1504
1505         RETURN(0);
1506 }
1507
1508 int lov_prep_statfs_set(struct obd_device *obd, struct obd_info *oinfo,
1509                         struct lov_request_set **reqset)
1510 {
1511         struct lov_request_set *set;
1512         struct lov_obd *lov = &obd->u.lov;
1513         int rc = 0, i;
1514         ENTRY;
1515
1516         OBD_ALLOC(set, sizeof(*set));
1517         if (set == NULL)
1518                 RETURN(-ENOMEM);
1519         lov_init_set(set);
1520
1521         set->set_obd = obd;
1522         set->set_oi = oinfo;
1523
1524         /* We only get block data from the OBD */
1525         for (i = 0; i < lov->desc.ld_tgt_count; i++) {
1526                 struct lov_request *req;
1527
1528                 if (lov->lov_tgts[i] == NULL ||
1529                     (oinfo->oi_flags & OBD_STATFS_NODELAY &&
1530                      !lov->lov_tgts[i]->ltd_active)) {
1531                         CDEBUG(D_HA, "lov idx %d inactive\n", i);
1532                         continue;
1533                 }
1534
1535                 if (!lov->lov_tgts[i]->ltd_active)
1536                         lov_check_and_wait_active(lov, i);
1537
1538                 /* skip targets that have been explicitely disabled by the
1539                  * administrator */
1540                 if (!lov->lov_tgts[i]->ltd_exp) {
1541                         CDEBUG(D_HA, "lov idx %d administratively disabled\n", i);
1542                         continue;
1543                 }
1544
1545                 OBD_ALLOC(req, sizeof(*req));
1546                 if (req == NULL)
1547                         GOTO(out_set, rc = -ENOMEM);
1548
1549                 OBD_ALLOC(req->rq_oi.oi_osfs, sizeof(*req->rq_oi.oi_osfs));
1550                 if (req->rq_oi.oi_osfs == NULL) {
1551                         OBD_FREE(req, sizeof(*req));
1552                         GOTO(out_set, rc = -ENOMEM);
1553                 }
1554
1555                 req->rq_idx = i;
1556                 req->rq_oi.oi_cb_up = cb_statfs_update;
1557                 req->rq_oi.oi_flags = oinfo->oi_flags;
1558
1559                 lov_set_add_req(req, set);
1560         }
1561         if (!set->set_count)
1562                 GOTO(out_set, rc = -EIO);
1563         *reqset = set;
1564         RETURN(rc);
1565 out_set:
1566         lov_fini_statfs_set(set);
1567         RETURN(rc);
1568 }