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, Whamcloud, Inc.
  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 <lustre/lustre_idl.h>
  48
  49 #include "lov_internal.h"
  50
  51 static void lov_init_set(struct lov_request_set *set)
  52 {
  53         set->set_count = 0;
  54         cfs_atomic_set(&set->set_completes, 0);
  55         cfs_atomic_set(&set->set_success, 0);
  56         cfs_atomic_set(&set->set_finish_checked, 0);
  57         set->set_cookies = 0;
  58         CFS_INIT_LIST_HEAD(&set->set_list);
  59         cfs_atomic_set(&set->set_refcount, 1);
  60         cfs_waitq_init(&set->set_waitq);
  61         spin_lock_init(&set->set_lock);
  62 }
  63
  64 void lov_finish_set(struct lov_request_set *set)
  65 {
  66         cfs_list_t *pos, *n;
  67         ENTRY;
  68
  69         LASSERT(set);
  70         cfs_list_for_each_safe(pos, n, &set->set_list) {
  71                 struct lov_request *req = cfs_list_entry(pos,
  72                                                          struct lov_request,
  73                                                          rq_link);
  74                 cfs_list_del_init(&req->rq_link);
  75
  76                 if (req->rq_oi.oi_oa)
  77                         OBDO_FREE(req->rq_oi.oi_oa);
  78                 if (req->rq_oi.oi_md)
  79                         OBD_FREE_LARGE(req->rq_oi.oi_md, req->rq_buflen);
  80                 if (req->rq_oi.oi_osfs)
  81                         OBD_FREE(req->rq_oi.oi_osfs,
  82                                  sizeof(*req->rq_oi.oi_osfs));
  83                 OBD_FREE(req, sizeof(*req));
  84         }
  85
  86         if (set->set_pga) {
  87                 int len = set->set_oabufs * sizeof(*set->set_pga);
  88                 OBD_FREE_LARGE(set->set_pga, len);
  89         }
  90         if (set->set_lockh)
  91                 lov_llh_put(set->set_lockh);
  92
  93         OBD_FREE(set, sizeof(*set));
  94         EXIT;
  95 }
  96
  97 int lov_set_finished(struct lov_request_set *set, int idempotent)
  98 {
  99         int completes = cfs_atomic_read(&set->set_completes);
 100
 101         CDEBUG(D_INFO, "check set %d/%d\n", completes, set->set_count);
 102
 103         if (completes == set->set_count) {
 104                 if (idempotent)
 105                         return 1;
 106                 if (cfs_atomic_inc_return(&set->set_finish_checked) == 1)
 107                         return 1;
 108         }
 109         return 0;
 110 }
 111
 112 void lov_update_set(struct lov_request_set *set,
 113                     struct lov_request *req, int rc)
 114 {
 115         req->rq_complete = 1;
 116         req->rq_rc = rc;
 117
 118         cfs_atomic_inc(&set->set_completes);
 119         if (rc == 0)
 120                 cfs_atomic_inc(&set->set_success);
 121
 122         cfs_waitq_signal(&set->set_waitq);
 123 }
 124
 125 int lov_update_common_set(struct lov_request_set *set,
 126                           struct lov_request *req, int rc)
 127 {
 128         struct lov_obd *lov = &set->set_exp->exp_obd->u.lov;
 129         ENTRY;
 130
 131         lov_update_set(set, req, rc);
 132
 133         /* grace error on inactive ost */
 134         if (rc && !(lov->lov_tgts[req->rq_idx] &&
 135                     lov->lov_tgts[req->rq_idx]->ltd_active))
 136                 rc = 0;
 137
 138         /* FIXME in raid1 regime, should return 0 */
 139         RETURN(rc);
 140 }
 141
 142 void lov_set_add_req(struct lov_request *req, struct lov_request_set *set)
 143 {
 144         cfs_list_add_tail(&req->rq_link, &set->set_list);
 145         set->set_count++;
 146         req->rq_rqset = set;
 147 }
 148
 149 extern void osc_update_enqueue(struct lustre_handle *lov_lockhp,
 150                                struct lov_oinfo *loi, int flags,
 151                                struct ost_lvb *lvb, __u32 mode, int rc);
 152
 153 static int lov_update_enqueue_lov(struct obd_export *exp,
 154                                   struct lustre_handle *lov_lockhp,
 155                                   struct lov_oinfo *loi, int flags, int idx,
 156                                   __u64 oid, int rc)
 157 {
 158         struct lov_obd *lov = &exp->exp_obd->u.lov;
 159
 160         if (rc != ELDLM_OK &&
 161             !(rc == ELDLM_LOCK_ABORTED && (flags & LDLM_FL_HAS_INTENT))) {
 162                 memset(lov_lockhp, 0, sizeof(*lov_lockhp));
 163                 if (lov->lov_tgts[idx] && lov->lov_tgts[idx]->ltd_active) {
 164                         /* -EUSERS used by OST to report file contention */
 165                         if (rc != -EINTR && rc != -EUSERS)
 166                                 CERROR("enqueue objid "LPX64" subobj "
 167                                        LPX64" on OST idx %d: rc %d\n",
 168                                        oid, loi->loi_id, loi->loi_ost_idx, rc);
 169                 } else
 170                         rc = ELDLM_OK;
 171         }
 172         return rc;
 173 }
 174
 175 int lov_update_enqueue_set(struct lov_request *req, __u32 mode, int rc)
 176 {
 177         struct lov_request_set *set = req->rq_rqset;
 178         struct lustre_handle *lov_lockhp;
 179         struct obd_info *oi = set->set_oi;
 180         struct lov_oinfo *loi;
 181         ENTRY;
 182
 183         LASSERT(oi != NULL);
 184
 185         lov_lockhp = set->set_lockh->llh_handles + req->rq_stripe;
 186         loi = oi->oi_md->lsm_oinfo[req->rq_stripe];
 187
 188         /* XXX LOV STACKING: OSC gets a copy, created in lov_prep_enqueue_set
 189          * and that copy can be arbitrarily out of date.
 190          *
 191          * The LOV API is due for a serious rewriting anyways, and this
 192          * can be addressed then. */
 193
 194         lov_stripe_lock(oi->oi_md);
 195         osc_update_enqueue(lov_lockhp, loi, oi->oi_flags,
 196                            &req->rq_oi.oi_md->lsm_oinfo[0]->loi_lvb, mode, rc);
 197         if (rc == ELDLM_LOCK_ABORTED && (oi->oi_flags & LDLM_FL_HAS_INTENT))
 198                 memset(lov_lockhp, 0, sizeof *lov_lockhp);
 199         rc = lov_update_enqueue_lov(set->set_exp, lov_lockhp, loi, oi->oi_flags,
 200                                     req->rq_idx, oi->oi_md->lsm_object_id, rc);
 201         lov_stripe_unlock(oi->oi_md);
 202         lov_update_set(set, req, rc);
 203         RETURN(rc);
 204 }
 205
 206 /* The callback for osc_enqueue that updates lov info for every OSC request. */
 207 static int cb_update_enqueue(void *cookie, int rc)
 208 {
 209         struct obd_info *oinfo = cookie;
 210         struct ldlm_enqueue_info *einfo;
 211         struct lov_request *lovreq;
 212
 213         lovreq = container_of(oinfo, struct lov_request, rq_oi);
 214         einfo = lovreq->rq_rqset->set_ei;
 215         return lov_update_enqueue_set(lovreq, einfo->ei_mode, rc);
 216 }
 217
 218 static int enqueue_done(struct lov_request_set *set, __u32 mode)
 219 {
 220         struct lov_request *req;
 221         struct lov_obd *lov = &set->set_exp->exp_obd->u.lov;
 222         int completes = cfs_atomic_read(&set->set_completes);
 223         int rc = 0;
 224         ENTRY;
 225
 226         /* enqueue/match success, just return */
 227         if (completes && completes == cfs_atomic_read(&set->set_success))
 228                 RETURN(0);
 229
 230         /* cancel enqueued/matched locks */
 231         cfs_list_for_each_entry(req, &set->set_list, rq_link) {
 232                 struct lustre_handle *lov_lockhp;
 233
 234                 if (!req->rq_complete || req->rq_rc)
 235                         continue;
 236
 237                 lov_lockhp = set->set_lockh->llh_handles + req->rq_stripe;
 238                 LASSERT(lov_lockhp);
 239                 if (!lustre_handle_is_used(lov_lockhp))
 240                         continue;
 241
 242                 rc = obd_cancel(lov->lov_tgts[req->rq_idx]->ltd_exp,
 243                                 req->rq_oi.oi_md, mode, lov_lockhp);
 244                 if (rc && lov->lov_tgts[req->rq_idx] &&
 245                     lov->lov_tgts[req->rq_idx]->ltd_active)
 246                         CERROR("cancelling obdjid "LPX64" on OST "
 247                                "idx %d error: rc = %d\n",
 248                                req->rq_oi.oi_md->lsm_object_id,
 249                                req->rq_idx, rc);
 250         }
 251         if (set->set_lockh)
 252                 lov_llh_put(set->set_lockh);
 253         RETURN(rc);
 254 }
 255
 256 int lov_fini_enqueue_set(struct lov_request_set *set, __u32 mode, int rc,
 257                          struct ptlrpc_request_set *rqset)
 258 {
 259         int ret = 0;
 260         ENTRY;
 261
 262         if (set == NULL)
 263                 RETURN(0);
 264         LASSERT(set->set_exp);
 265         /* Do enqueue_done only for sync requests and if any request
 266          * succeeded. */
 267         if (!rqset) {
 268                 if (rc)
 269                         cfs_atomic_set(&set->set_completes, 0);
 270                 ret = enqueue_done(set, mode);
 271         } else if (set->set_lockh)
 272                 lov_llh_put(set->set_lockh);
 273
 274         lov_put_reqset(set);
 275
 276         RETURN(rc ? rc : ret);
 277 }
 278
 279 static void lov_llh_addref(void *llhp)
 280 {
 281         struct lov_lock_handles *llh = llhp;
 282
 283         cfs_atomic_inc(&llh->llh_refcount);
 284         CDEBUG(D_INFO, "GETting llh %p : new refcount %d\n", llh,
 285                cfs_atomic_read(&llh->llh_refcount));
 286 }
 287
 288 static struct portals_handle_ops lov_handle_ops = {
 289         .hop_addref = lov_llh_addref,
 290         .hop_free   = NULL,
 291 };
 292
 293 static struct lov_lock_handles *lov_llh_new(struct lov_stripe_md *lsm)
 294 {
 295         struct lov_lock_handles *llh;
 296
 297         OBD_ALLOC(llh, sizeof *llh +
 298                   sizeof(*llh->llh_handles) * lsm->lsm_stripe_count);
 299         if (llh == NULL)
 300                 return NULL;
 301
 302         cfs_atomic_set(&llh->llh_refcount, 2);
 303         llh->llh_stripe_count = lsm->lsm_stripe_count;
 304         CFS_INIT_LIST_HEAD(&llh->llh_handle.h_link);
 305         class_handle_hash(&llh->llh_handle, &lov_handle_ops);
 306
 307         return llh;
 308 }
 309
 310 int lov_prep_enqueue_set(struct obd_export *exp, struct obd_info *oinfo,
 311                          struct ldlm_enqueue_info *einfo,
 312                          struct lov_request_set **reqset)
 313 {
 314         struct lov_obd *lov = &exp->exp_obd->u.lov;
 315         struct lov_request_set *set;
 316         int i, rc = 0;
 317         ENTRY;
 318
 319         OBD_ALLOC(set, sizeof(*set));
 320         if (set == NULL)
 321                 RETURN(-ENOMEM);
 322         lov_init_set(set);
 323
 324         set->set_exp = exp;
 325         set->set_oi = oinfo;
 326         set->set_ei = einfo;
 327         set->set_lockh = lov_llh_new(oinfo->oi_md);
 328         if (set->set_lockh == NULL)
 329                 GOTO(out_set, rc = -ENOMEM);
 330         oinfo->oi_lockh->cookie = set->set_lockh->llh_handle.h_cookie;
 331
 332         for (i = 0; i < oinfo->oi_md->lsm_stripe_count; i++) {
 333                 struct lov_oinfo *loi;
 334                 struct lov_request *req;
 335                 obd_off start, end;
 336
 337                 loi = oinfo->oi_md->lsm_oinfo[i];
 338                 if (!lov_stripe_intersects(oinfo->oi_md, i,
 339                                            oinfo->oi_policy.l_extent.start,
 340                                            oinfo->oi_policy.l_extent.end,
 341                                            &start, &end))
 342                         continue;
 343
 344                 if (!lov->lov_tgts[loi->loi_ost_idx] ||
 345                     !lov->lov_tgts[loi->loi_ost_idx]->ltd_active) {
 346                         CDEBUG(D_HA, "lov idx %d inactive\n", loi->loi_ost_idx);
 347                         continue;
 348                 }
 349
 350                 OBD_ALLOC(req, sizeof(*req));
 351                 if (req == NULL)
 352                         GOTO(out_set, rc = -ENOMEM);
 353
 354                 req->rq_buflen = sizeof(*req->rq_oi.oi_md) +
 355                         sizeof(struct lov_oinfo *) +
 356                         sizeof(struct lov_oinfo);
 357                 OBD_ALLOC_LARGE(req->rq_oi.oi_md, req->rq_buflen);
 358                 if (req->rq_oi.oi_md == NULL) {
 359                         OBD_FREE(req, sizeof(*req));
 360                         GOTO(out_set, rc = -ENOMEM);
 361                 }
 362                 req->rq_oi.oi_md->lsm_oinfo[0] =
 363                         ((void *)req->rq_oi.oi_md) + sizeof(*req->rq_oi.oi_md) +
 364                         sizeof(struct lov_oinfo *);
 365
 366                 /* Set lov request specific parameters. */
 367                 req->rq_oi.oi_lockh = set->set_lockh->llh_handles + i;
 368                 req->rq_oi.oi_cb_up = cb_update_enqueue;
 369                 req->rq_oi.oi_flags = oinfo->oi_flags;
 370
 371                 LASSERT(req->rq_oi.oi_lockh);
 372
 373                 req->rq_oi.oi_policy.l_extent.gid =
 374                         oinfo->oi_policy.l_extent.gid;
 375                 req->rq_oi.oi_policy.l_extent.start = start;
 376                 req->rq_oi.oi_policy.l_extent.end = end;
 377
 378                 req->rq_idx = loi->loi_ost_idx;
 379                 req->rq_stripe = i;
 380
 381                 /* XXX LOV STACKING: submd should be from the subobj */
 382                 req->rq_oi.oi_md->lsm_object_id = loi->loi_id;
 383                 req->rq_oi.oi_md->lsm_object_seq = loi->loi_seq;
 384                 req->rq_oi.oi_md->lsm_stripe_count = 0;
 385                 req->rq_oi.oi_md->lsm_oinfo[0]->loi_kms_valid =
 386                         loi->loi_kms_valid;
 387                 req->rq_oi.oi_md->lsm_oinfo[0]->loi_kms = loi->loi_kms;
 388                 req->rq_oi.oi_md->lsm_oinfo[0]->loi_lvb = loi->loi_lvb;
 389
 390                 lov_set_add_req(req, set);
 391         }
 392         if (!set->set_count)
 393                 GOTO(out_set, rc = -EIO);
 394         *reqset = set;
 395         RETURN(0);
 396 out_set:
 397         lov_fini_enqueue_set(set, einfo->ei_mode, rc, NULL);
 398         RETURN(rc);
 399 }
 400
 401 int lov_fini_match_set(struct lov_request_set *set, __u32 mode, int flags)
 402 {
 403         int rc = 0;
 404         ENTRY;
 405
 406         if (set == NULL)
 407                 RETURN(0);
 408         LASSERT(set->set_exp);
 409         rc = enqueue_done(set, mode);
 410         if ((set->set_count == cfs_atomic_read(&set->set_success)) &&
 411             (flags & LDLM_FL_TEST_LOCK))
 412                 lov_llh_put(set->set_lockh);
 413
 414         lov_put_reqset(set);
 415
 416         RETURN(rc);
 417 }
 418
 419 int lov_prep_match_set(struct obd_export *exp, struct obd_info *oinfo,
 420                        struct lov_stripe_md *lsm, ldlm_policy_data_t *policy,
 421                        __u32 mode, struct lustre_handle *lockh,
 422                        struct lov_request_set **reqset)
 423 {
 424         struct lov_obd *lov = &exp->exp_obd->u.lov;
 425         struct lov_request_set *set;
 426         int i, rc = 0;
 427         ENTRY;
 428
 429         OBD_ALLOC(set, sizeof(*set));
 430         if (set == NULL)
 431                 RETURN(-ENOMEM);
 432         lov_init_set(set);
 433
 434         set->set_exp = exp;
 435         set->set_oi = oinfo;
 436         set->set_oi->oi_md = lsm;
 437         set->set_lockh = lov_llh_new(lsm);
 438         if (set->set_lockh == NULL)
 439                 GOTO(out_set, rc = -ENOMEM);
 440         lockh->cookie = set->set_lockh->llh_handle.h_cookie;
 441
 442         for (i = 0; i < lsm->lsm_stripe_count; i++){
 443                 struct lov_oinfo *loi;
 444                 struct lov_request *req;
 445                 obd_off start, end;
 446
 447                 loi = lsm->lsm_oinfo[i];
 448                 if (!lov_stripe_intersects(lsm, i, policy->l_extent.start,
 449                                            policy->l_extent.end, &start, &end))
 450                         continue;
 451
 452                 /* FIXME raid1 should grace this error */
 453                 if (!lov->lov_tgts[loi->loi_ost_idx] ||
 454                     !lov->lov_tgts[loi->loi_ost_idx]->ltd_active) {
 455                         CDEBUG(D_HA, "lov idx %d inactive\n", loi->loi_ost_idx);
 456                         GOTO(out_set, rc = -EIO);
 457                 }
 458
 459                 OBD_ALLOC(req, sizeof(*req));
 460                 if (req == NULL)
 461                         GOTO(out_set, rc = -ENOMEM);
 462
 463                 req->rq_buflen = sizeof(*req->rq_oi.oi_md);
 464                 OBD_ALLOC_LARGE(req->rq_oi.oi_md, req->rq_buflen);
 465                 if (req->rq_oi.oi_md == NULL) {
 466                         OBD_FREE(req, sizeof(*req));
 467                         GOTO(out_set, rc = -ENOMEM);
 468                 }
 469
 470                 req->rq_oi.oi_policy.l_extent.start = start;
 471                 req->rq_oi.oi_policy.l_extent.end = end;
 472                 req->rq_oi.oi_policy.l_extent.gid = policy->l_extent.gid;
 473
 474                 req->rq_idx = loi->loi_ost_idx;
 475                 req->rq_stripe = i;
 476
 477                 /* XXX LOV STACKING: submd should be from the subobj */
 478                 req->rq_oi.oi_md->lsm_object_id = loi->loi_id;
 479                 req->rq_oi.oi_md->lsm_object_seq = loi->loi_seq;
 480                 req->rq_oi.oi_md->lsm_stripe_count = 0;
 481
 482                 lov_set_add_req(req, set);
 483         }
 484         if (!set->set_count)
 485                 GOTO(out_set, rc = -EIO);
 486         *reqset = set;
 487         RETURN(rc);
 488 out_set:
 489         lov_fini_match_set(set, mode, 0);
 490         RETURN(rc);
 491 }
 492
 493 int lov_fini_cancel_set(struct lov_request_set *set)
 494 {
 495         int rc = 0;
 496         ENTRY;
 497
 498         if (set == NULL)
 499                 RETURN(0);
 500
 501         LASSERT(set->set_exp);
 502         if (set->set_lockh)
 503                 lov_llh_put(set->set_lockh);
 504
 505         lov_put_reqset(set);
 506
 507         RETURN(rc);
 508 }
 509
 510 int lov_prep_cancel_set(struct obd_export *exp, struct obd_info *oinfo,
 511                         struct lov_stripe_md *lsm, __u32 mode,
 512                         struct lustre_handle *lockh,
 513                         struct lov_request_set **reqset)
 514 {
 515         struct lov_request_set *set;
 516         int i, rc = 0;
 517         ENTRY;
 518
 519         OBD_ALLOC(set, sizeof(*set));
 520         if (set == NULL)
 521                 RETURN(-ENOMEM);
 522         lov_init_set(set);
 523
 524         set->set_exp = exp;
 525         set->set_oi = oinfo;
 526         set->set_oi->oi_md = lsm;
 527         set->set_lockh = lov_handle2llh(lockh);
 528         if (set->set_lockh == NULL) {
 529                 CERROR("LOV: invalid lov lock handle %p\n", lockh);
 530                 GOTO(out_set, rc = -EINVAL);
 531         }
 532         lockh->cookie = set->set_lockh->llh_handle.h_cookie;
 533
 534         for (i = 0; i < lsm->lsm_stripe_count; i++){
 535                 struct lov_request *req;
 536                 struct lustre_handle *lov_lockhp;
 537                 struct lov_oinfo *loi = lsm->lsm_oinfo[i];
 538
 539                 lov_lockhp = set->set_lockh->llh_handles + i;
 540                 if (!lustre_handle_is_used(lov_lockhp)) {
 541                         CDEBUG(D_INFO, "lov idx %d subobj "LPX64" no lock\n",
 542                                loi->loi_ost_idx, loi->loi_id);
 543                         continue;
 544                 }
 545
 546                 OBD_ALLOC(req, sizeof(*req));
 547                 if (req == NULL)
 548                         GOTO(out_set, rc = -ENOMEM);
 549
 550                 req->rq_buflen = sizeof(*req->rq_oi.oi_md);
 551                 OBD_ALLOC_LARGE(req->rq_oi.oi_md, req->rq_buflen);
 552                 if (req->rq_oi.oi_md == NULL) {
 553                         OBD_FREE(req, sizeof(*req));
 554                         GOTO(out_set, rc = -ENOMEM);
 555                 }
 556
 557                 req->rq_idx = loi->loi_ost_idx;
 558                 req->rq_stripe = i;
 559
 560                 /* XXX LOV STACKING: submd should be from the subobj */
 561                 req->rq_oi.oi_md->lsm_object_id = loi->loi_id;
 562                 req->rq_oi.oi_md->lsm_object_seq = loi->loi_seq;
 563                 req->rq_oi.oi_md->lsm_stripe_count = 0;
 564
 565                 lov_set_add_req(req, set);
 566         }
 567         if (!set->set_count)
 568                 GOTO(out_set, rc = -EIO);
 569         *reqset = set;
 570         RETURN(rc);
 571 out_set:
 572         lov_fini_cancel_set(set);
 573         RETURN(rc);
 574 }
 575 static int common_attr_done(struct lov_request_set *set)
 576 {
 577         cfs_list_t *pos;
 578         struct lov_request *req;
 579         struct obdo *tmp_oa;
 580         int rc = 0, attrset = 0;
 581         ENTRY;
 582
 583         LASSERT(set->set_oi != NULL);
 584
 585         if (set->set_oi->oi_oa == NULL)
 586                 RETURN(0);
 587
 588         if (!cfs_atomic_read(&set->set_success))
 589                 RETURN(-EIO);
 590
 591         OBDO_ALLOC(tmp_oa);
 592         if (tmp_oa == NULL)
 593                 GOTO(out, rc = -ENOMEM);
 594
 595         cfs_list_for_each (pos, &set->set_list) {
 596                 req = cfs_list_entry(pos, struct lov_request, rq_link);
 597
 598                 if (!req->rq_complete || req->rq_rc)
 599                         continue;
 600                 if (req->rq_oi.oi_oa->o_valid == 0)   /* inactive stripe */
 601                         continue;
 602                 lov_merge_attrs(tmp_oa, req->rq_oi.oi_oa,
 603                                 req->rq_oi.oi_oa->o_valid,
 604                                 set->set_oi->oi_md, req->rq_stripe, &attrset);
 605         }
 606         if (!attrset) {
 607                 CERROR("No stripes had valid attrs\n");
 608                 rc = -EIO;
 609         }
 610         if ((set->set_oi->oi_oa->o_valid & OBD_MD_FLEPOCH) &&
 611             (set->set_oi->oi_md->lsm_stripe_count != attrset)) {
 612                 /* When we take attributes of some epoch, we require all the
 613                  * ost to be active. */
 614                 CERROR("Not all the stripes had valid attrs\n");
 615                 GOTO(out, rc = -EIO);
 616         }
 617
 618         tmp_oa->o_id = set->set_oi->oi_oa->o_id;
 619         memcpy(set->set_oi->oi_oa, tmp_oa, sizeof(*set->set_oi->oi_oa));
 620 out:
 621         if (tmp_oa)
 622                 OBDO_FREE(tmp_oa);
 623         RETURN(rc);
 624
 625 }
 626
 627 static int brw_done(struct lov_request_set *set)
 628 {
 629         struct lov_stripe_md *lsm = set->set_oi->oi_md;
 630         struct lov_oinfo     *loi = NULL;
 631         cfs_list_t *pos;
 632         struct lov_request *req;
 633         ENTRY;
 634
 635         cfs_list_for_each (pos, &set->set_list) {
 636                 req = cfs_list_entry(pos, struct lov_request, rq_link);
 637
 638                 if (!req->rq_complete || req->rq_rc)
 639                         continue;
 640
 641                 loi = lsm->lsm_oinfo[req->rq_stripe];
 642
 643                 if (req->rq_oi.oi_oa->o_valid & OBD_MD_FLBLOCKS)
 644                         loi->loi_lvb.lvb_blocks = req->rq_oi.oi_oa->o_blocks;
 645         }
 646
 647         RETURN(0);
 648 }
 649
 650 int lov_fini_brw_set(struct lov_request_set *set)
 651 {
 652         int rc = 0;
 653         ENTRY;
 654
 655         if (set == NULL)
 656                 RETURN(0);
 657         LASSERT(set->set_exp);
 658         if (cfs_atomic_read(&set->set_completes)) {
 659                 rc = brw_done(set);
 660                 /* FIXME update qos data here */
 661         }
 662         lov_put_reqset(set);
 663
 664         RETURN(rc);
 665 }
 666
 667 int lov_prep_brw_set(struct obd_export *exp, struct obd_info *oinfo,
 668                      obd_count oa_bufs, struct brw_page *pga,
 669                      struct obd_trans_info *oti,
 670                      struct lov_request_set **reqset)
 671 {
 672         struct {
 673                 obd_count       index;
 674                 obd_count       count;
 675                 obd_count       off;
 676         } *info = NULL;
 677         struct lov_request_set *set;
 678         struct lov_obd *lov = &exp->exp_obd->u.lov;
 679         int rc = 0, i, shift;
 680         ENTRY;
 681
 682         OBD_ALLOC(set, sizeof(*set));
 683         if (set == NULL)
 684                 RETURN(-ENOMEM);
 685         lov_init_set(set);
 686
 687         set->set_exp = exp;
 688         set->set_oti = oti;
 689         set->set_oi = oinfo;
 690         set->set_oabufs = oa_bufs;
 691         OBD_ALLOC_LARGE(set->set_pga, oa_bufs * sizeof(*set->set_pga));
 692         if (!set->set_pga)
 693                 GOTO(out, rc = -ENOMEM);
 694
 695         OBD_ALLOC_LARGE(info, sizeof(*info) * oinfo->oi_md->lsm_stripe_count);
 696         if (!info)
 697                 GOTO(out, rc = -ENOMEM);
 698
 699         /* calculate the page count for each stripe */
 700         for (i = 0; i < oa_bufs; i++) {
 701                 int stripe = lov_stripe_number(oinfo->oi_md, pga[i].off);
 702                 info[stripe].count++;
 703         }
 704
 705         /* alloc and initialize lov request */
 706         shift = 0;
 707         for (i = 0; i < oinfo->oi_md->lsm_stripe_count; i++){
 708                 struct lov_oinfo *loi = NULL;
 709                 struct lov_request *req;
 710
 711                 if (info[i].count == 0)
 712                         continue;
 713
 714                 loi = oinfo->oi_md->lsm_oinfo[i];
 715                 if (!lov->lov_tgts[loi->loi_ost_idx] ||
 716                     !lov->lov_tgts[loi->loi_ost_idx]->ltd_active) {
 717                         CDEBUG(D_HA, "lov idx %d inactive\n", loi->loi_ost_idx);
 718                         GOTO(out, rc = -EIO);
 719                 }
 720
 721                 OBD_ALLOC(req, sizeof(*req));
 722                 if (req == NULL)
 723                         GOTO(out, rc = -ENOMEM);
 724
 725                 OBDO_ALLOC(req->rq_oi.oi_oa);
 726                 if (req->rq_oi.oi_oa == NULL) {
 727                         OBD_FREE(req, sizeof(*req));
 728                         GOTO(out, rc = -ENOMEM);
 729                 }
 730
 731                 if (oinfo->oi_oa) {
 732                         memcpy(req->rq_oi.oi_oa, oinfo->oi_oa,
 733                                sizeof(*req->rq_oi.oi_oa));
 734                 }
 735                 req->rq_oi.oi_oa->o_id = loi->loi_id;
 736                 req->rq_oi.oi_oa->o_seq = loi->loi_seq;
 737                 req->rq_oi.oi_oa->o_stripe_idx = i;
 738
 739                 req->rq_buflen = sizeof(*req->rq_oi.oi_md);
 740                 OBD_ALLOC_LARGE(req->rq_oi.oi_md, req->rq_buflen);
 741                 if (req->rq_oi.oi_md == NULL) {
 742                         OBDO_FREE(req->rq_oi.oi_oa);
 743                         OBD_FREE(req, sizeof(*req));
 744                         GOTO(out, rc = -ENOMEM);
 745                 }
 746
 747                 req->rq_idx = loi->loi_ost_idx;
 748                 req->rq_stripe = i;
 749
 750                 /* XXX LOV STACKING */
 751                 req->rq_oi.oi_md->lsm_object_id = loi->loi_id;
 752                 req->rq_oi.oi_md->lsm_object_seq = loi->loi_seq;
 753                 req->rq_oabufs = info[i].count;
 754                 req->rq_pgaidx = shift;
 755                 shift += req->rq_oabufs;
 756
 757                 /* remember the index for sort brw_page array */
 758                 info[i].index = req->rq_pgaidx;
 759
 760                 req->rq_oi.oi_capa = oinfo->oi_capa;
 761
 762                 lov_set_add_req(req, set);
 763         }
 764         if (!set->set_count)
 765                 GOTO(out, rc = -EIO);
 766
 767         /* rotate & sort the brw_page array */
 768         for (i = 0; i < oa_bufs; i++) {
 769                 int stripe = lov_stripe_number(oinfo->oi_md, pga[i].off);
 770
 771                 shift = info[stripe].index + info[stripe].off;
 772                 LASSERT(shift < oa_bufs);
 773                 set->set_pga[shift] = pga[i];
 774                 lov_stripe_offset(oinfo->oi_md, pga[i].off, stripe,
 775                                   &set->set_pga[shift].off);
 776                 info[stripe].off++;
 777         }
 778 out:
 779         if (info)
 780                 OBD_FREE_LARGE(info,
 781                                sizeof(*info) * oinfo->oi_md->lsm_stripe_count);
 782
 783         if (rc == 0)
 784                 *reqset = set;
 785         else
 786                 lov_fini_brw_set(set);
 787
 788         RETURN(rc);
 789 }
 790
 791 int lov_fini_getattr_set(struct lov_request_set *set)
 792 {
 793         int rc = 0;
 794         ENTRY;
 795
 796         if (set == NULL)
 797                 RETURN(0);
 798         LASSERT(set->set_exp);
 799         if (cfs_atomic_read(&set->set_completes))
 800                 rc = common_attr_done(set);
 801
 802         lov_put_reqset(set);
 803
 804         RETURN(rc);
 805 }
 806
 807 /* The callback for osc_getattr_async that finilizes a request info when a
 808  * response is received. */
 809 static int cb_getattr_update(void *cookie, int rc)
 810 {
 811         struct obd_info *oinfo = cookie;
 812         struct lov_request *lovreq;
 813         lovreq = container_of(oinfo, struct lov_request, rq_oi);
 814         return lov_update_common_set(lovreq->rq_rqset, lovreq, rc);
 815 }
 816
 817 int lov_prep_getattr_set(struct obd_export *exp, struct obd_info *oinfo,
 818                          struct lov_request_set **reqset)
 819 {
 820         struct lov_request_set *set;
 821         struct lov_obd *lov = &exp->exp_obd->u.lov;
 822         int rc = 0, i;
 823         ENTRY;
 824
 825         OBD_ALLOC(set, sizeof(*set));
 826         if (set == NULL)
 827                 RETURN(-ENOMEM);
 828         lov_init_set(set);
 829
 830         set->set_exp = exp;
 831         set->set_oi = oinfo;
 832
 833         for (i = 0; i < oinfo->oi_md->lsm_stripe_count; i++) {
 834                 struct lov_oinfo *loi;
 835                 struct lov_request *req;
 836
 837                 loi = oinfo->oi_md->lsm_oinfo[i];
 838                 if (!lov->lov_tgts[loi->loi_ost_idx] ||
 839                     !lov->lov_tgts[loi->loi_ost_idx]->ltd_active) {
 840                         CDEBUG(D_HA, "lov idx %d inactive\n", loi->loi_ost_idx);
 841                         if (oinfo->oi_oa->o_valid & OBD_MD_FLEPOCH)
 842                                 /* SOM requires all the OSTs to be active. */
 843                                 GOTO(out_set, rc = -EIO);
 844                         continue;
 845                 }
 846
 847                 OBD_ALLOC(req, sizeof(*req));
 848                 if (req == NULL)
 849                         GOTO(out_set, rc = -ENOMEM);
 850
 851                 req->rq_stripe = i;
 852                 req->rq_idx = loi->loi_ost_idx;
 853
 854                 OBDO_ALLOC(req->rq_oi.oi_oa);
 855                 if (req->rq_oi.oi_oa == NULL) {
 856                         OBD_FREE(req, sizeof(*req));
 857                         GOTO(out_set, rc = -ENOMEM);
 858                 }
 859                 memcpy(req->rq_oi.oi_oa, oinfo->oi_oa,
 860                        sizeof(*req->rq_oi.oi_oa));
 861                 req->rq_oi.oi_oa->o_id = loi->loi_id;
 862                 req->rq_oi.oi_oa->o_seq = loi->loi_seq;
 863                 req->rq_oi.oi_cb_up = cb_getattr_update;
 864                 req->rq_oi.oi_capa = oinfo->oi_capa;
 865
 866                 lov_set_add_req(req, set);
 867         }
 868         if (!set->set_count)
 869                 GOTO(out_set, rc = -EIO);
 870         *reqset = set;
 871         RETURN(rc);
 872 out_set:
 873         lov_fini_getattr_set(set);
 874         RETURN(rc);
 875 }
 876
 877 int lov_fini_destroy_set(struct lov_request_set *set)
 878 {
 879         ENTRY;
 880
 881         if (set == NULL)
 882                 RETURN(0);
 883         LASSERT(set->set_exp);
 884         if (cfs_atomic_read(&set->set_completes)) {
 885                 /* FIXME update qos data here */
 886         }
 887
 888         lov_put_reqset(set);
 889
 890         RETURN(0);
 891 }
 892
 893 int lov_prep_destroy_set(struct obd_export *exp, struct obd_info *oinfo,
 894                          struct obdo *src_oa, struct lov_stripe_md *lsm,
 895                          struct obd_trans_info *oti,
 896                          struct lov_request_set **reqset)
 897 {
 898         struct lov_request_set *set;
 899         struct lov_obd *lov = &exp->exp_obd->u.lov;
 900         int rc = 0, i;
 901         ENTRY;
 902
 903         OBD_ALLOC(set, sizeof(*set));
 904         if (set == NULL)
 905                 RETURN(-ENOMEM);
 906         lov_init_set(set);
 907
 908         set->set_exp = exp;
 909         set->set_oi = oinfo;
 910         set->set_oi->oi_md = lsm;
 911         set->set_oi->oi_oa = src_oa;
 912         set->set_oti = oti;
 913         if (oti != NULL && src_oa->o_valid & OBD_MD_FLCOOKIE)
 914                 set->set_cookies = oti->oti_logcookies;
 915
 916         for (i = 0; i < lsm->lsm_stripe_count; i++) {
 917                 struct lov_oinfo *loi;
 918                 struct lov_request *req;
 919
 920                 loi = lsm->lsm_oinfo[i];
 921                 if (!lov->lov_tgts[loi->loi_ost_idx] ||
 922                     !lov->lov_tgts[loi->loi_ost_idx]->ltd_active) {
 923                         CDEBUG(D_HA, "lov idx %d inactive\n", loi->loi_ost_idx);
 924                         continue;
 925                 }
 926
 927                 OBD_ALLOC(req, sizeof(*req));
 928                 if (req == NULL)
 929                         GOTO(out_set, rc = -ENOMEM);
 930
 931                 req->rq_stripe = i;
 932                 req->rq_idx = loi->loi_ost_idx;
 933
 934                 OBDO_ALLOC(req->rq_oi.oi_oa);
 935                 if (req->rq_oi.oi_oa == NULL) {
 936                         OBD_FREE(req, sizeof(*req));
 937                         GOTO(out_set, rc = -ENOMEM);
 938                 }
 939                 memcpy(req->rq_oi.oi_oa, src_oa, sizeof(*req->rq_oi.oi_oa));
 940                 req->rq_oi.oi_oa->o_id = loi->loi_id;
 941                 req->rq_oi.oi_oa->o_seq = loi->loi_seq;
 942                 lov_set_add_req(req, set);
 943         }
 944         if (!set->set_count)
 945                 GOTO(out_set, rc = -EIO);
 946         *reqset = set;
 947         RETURN(rc);
 948 out_set:
 949         lov_fini_destroy_set(set);
 950         RETURN(rc);
 951 }
 952
 953 int lov_fini_setattr_set(struct lov_request_set *set)
 954 {
 955         int rc = 0;
 956         ENTRY;
 957
 958         if (set == NULL)
 959                 RETURN(0);
 960         LASSERT(set->set_exp);
 961         if (cfs_atomic_read(&set->set_completes)) {
 962                 rc = common_attr_done(set);
 963                 /* FIXME update qos data here */
 964         }
 965
 966         lov_put_reqset(set);
 967         RETURN(rc);
 968 }
 969
 970 int lov_update_setattr_set(struct lov_request_set *set,
 971                            struct lov_request *req, int rc)
 972 {
 973         struct lov_obd *lov = &req->rq_rqset->set_exp->exp_obd->u.lov;
 974         struct lov_stripe_md *lsm = req->rq_rqset->set_oi->oi_md;
 975         ENTRY;
 976
 977         lov_update_set(set, req, rc);
 978
 979         /* grace error on inactive ost */
 980         if (rc && !(lov->lov_tgts[req->rq_idx] &&
 981                     lov->lov_tgts[req->rq_idx]->ltd_active))
 982                 rc = 0;
 983
 984         if (rc == 0) {
 985                 if (req->rq_oi.oi_oa->o_valid & OBD_MD_FLCTIME)
 986                         lsm->lsm_oinfo[req->rq_stripe]->loi_lvb.lvb_ctime =
 987                                 req->rq_oi.oi_oa->o_ctime;
 988                 if (req->rq_oi.oi_oa->o_valid & OBD_MD_FLMTIME)
 989                         lsm->lsm_oinfo[req->rq_stripe]->loi_lvb.lvb_mtime =
 990                                 req->rq_oi.oi_oa->o_mtime;
 991                 if (req->rq_oi.oi_oa->o_valid & OBD_MD_FLATIME)
 992                         lsm->lsm_oinfo[req->rq_stripe]->loi_lvb.lvb_atime =
 993                                 req->rq_oi.oi_oa->o_atime;
 994         }
 995
 996         RETURN(rc);
 997 }
 998
 999 /* The callback for osc_setattr_async that finilizes a request info when a
1000  * response is received. */
1001 static int cb_setattr_update(void *cookie, int rc)
1002 {
1003         struct obd_info *oinfo = cookie;
1004         struct lov_request *lovreq;
1005         lovreq = container_of(oinfo, struct lov_request, rq_oi);
1006         return lov_update_setattr_set(lovreq->rq_rqset, lovreq, rc);
1007 }
1008
1009 int lov_prep_setattr_set(struct obd_export *exp, struct obd_info *oinfo,
1010                          struct obd_trans_info *oti,
1011                          struct lov_request_set **reqset)
1012 {
1013         struct lov_request_set *set;
1014         struct lov_obd *lov = &exp->exp_obd->u.lov;
1015         int rc = 0, i;
1016         ENTRY;
1017
1018         OBD_ALLOC(set, sizeof(*set));
1019         if (set == NULL)
1020                 RETURN(-ENOMEM);
1021         lov_init_set(set);
1022
1023         set->set_exp = exp;
1024         set->set_oti = oti;
1025         set->set_oi = oinfo;
1026         if (oti != NULL && oinfo->oi_oa->o_valid & OBD_MD_FLCOOKIE)
1027                 set->set_cookies = oti->oti_logcookies;
1028
1029         for (i = 0; i < oinfo->oi_md->lsm_stripe_count; i++) {
1030                 struct lov_oinfo *loi = oinfo->oi_md->lsm_oinfo[i];
1031                 struct lov_request *req;
1032
1033                 if (!lov->lov_tgts[loi->loi_ost_idx] ||
1034                     !lov->lov_tgts[loi->loi_ost_idx]->ltd_active) {
1035                         CDEBUG(D_HA, "lov idx %d inactive\n", loi->loi_ost_idx);
1036                         continue;
1037                 }
1038
1039                 OBD_ALLOC(req, sizeof(*req));
1040                 if (req == NULL)
1041                         GOTO(out_set, rc = -ENOMEM);
1042                 req->rq_stripe = i;
1043                 req->rq_idx = loi->loi_ost_idx;
1044
1045                 OBDO_ALLOC(req->rq_oi.oi_oa);
1046                 if (req->rq_oi.oi_oa == NULL) {
1047                         OBD_FREE(req, sizeof(*req));
1048                         GOTO(out_set, rc = -ENOMEM);
1049                 }
1050                 memcpy(req->rq_oi.oi_oa, oinfo->oi_oa,
1051                        sizeof(*req->rq_oi.oi_oa));
1052                 req->rq_oi.oi_oa->o_id = loi->loi_id;
1053                 req->rq_oi.oi_oa->o_seq= loi->loi_seq;
1054                 req->rq_oi.oi_oa->o_stripe_idx = i;
1055                 req->rq_oi.oi_cb_up = cb_setattr_update;
1056                 req->rq_oi.oi_capa = oinfo->oi_capa;
1057
1058                 if (oinfo->oi_oa->o_valid & OBD_MD_FLSIZE) {
1059                         int off = lov_stripe_offset(oinfo->oi_md,
1060                                                     oinfo->oi_oa->o_size, i,
1061                                                     &req->rq_oi.oi_oa->o_size);
1062
1063                         if (off < 0 && req->rq_oi.oi_oa->o_size)
1064                                 req->rq_oi.oi_oa->o_size--;
1065
1066                         CDEBUG(D_INODE, "stripe %d has size "LPU64"/"LPU64"\n",
1067                                i, req->rq_oi.oi_oa->o_size,
1068                                oinfo->oi_oa->o_size);
1069                 }
1070                 lov_set_add_req(req, set);
1071         }
1072         if (!set->set_count)
1073                 GOTO(out_set, rc = -EIO);
1074         *reqset = set;
1075         RETURN(rc);
1076 out_set:
1077         lov_fini_setattr_set(set);
1078         RETURN(rc);
1079 }
1080
1081 int lov_fini_punch_set(struct lov_request_set *set)
1082 {
1083         int rc = 0;
1084         ENTRY;
1085
1086         if (set == NULL)
1087                 RETURN(0);
1088         LASSERT(set->set_exp);
1089         if (cfs_atomic_read(&set->set_completes)) {
1090                 rc = -EIO;
1091                 /* FIXME update qos data here */
1092                 if (cfs_atomic_read(&set->set_success))
1093                         rc = common_attr_done(set);
1094         }
1095
1096         lov_put_reqset(set);
1097
1098         RETURN(rc);
1099 }
1100
1101 int lov_update_punch_set(struct lov_request_set *set,
1102                          struct lov_request *req, int rc)
1103 {
1104         struct lov_obd *lov = &req->rq_rqset->set_exp->exp_obd->u.lov;
1105         struct lov_stripe_md *lsm = req->rq_rqset->set_oi->oi_md;
1106         ENTRY;
1107
1108         lov_update_set(set, req, rc);
1109
1110         /* grace error on inactive ost */
1111         if (rc && !lov->lov_tgts[req->rq_idx]->ltd_active)
1112                 rc = 0;
1113
1114         if (rc == 0) {
1115                 lov_stripe_lock(lsm);
1116                 if (req->rq_oi.oi_oa->o_valid & OBD_MD_FLBLOCKS) {
1117                         lsm->lsm_oinfo[req->rq_stripe]->loi_lvb.lvb_blocks =
1118                                 req->rq_oi.oi_oa->o_blocks;
1119                 }
1120
1121                 lov_stripe_unlock(lsm);
1122         }
1123
1124         RETURN(rc);
1125 }
1126
1127 /* The callback for osc_punch that finilizes a request info when a response
1128  * is received. */
1129 static int cb_update_punch(void *cookie, int rc)
1130 {
1131         struct obd_info *oinfo = cookie;
1132         struct lov_request *lovreq;
1133         lovreq = container_of(oinfo, struct lov_request, rq_oi);
1134         return lov_update_punch_set(lovreq->rq_rqset, lovreq, rc);
1135 }
1136
1137 int lov_prep_punch_set(struct obd_export *exp, struct obd_info *oinfo,
1138                        struct obd_trans_info *oti,
1139                        struct lov_request_set **reqset)
1140 {
1141         struct lov_request_set *set;
1142         struct lov_obd *lov = &exp->exp_obd->u.lov;
1143         int rc = 0, i;
1144         ENTRY;
1145
1146         OBD_ALLOC(set, sizeof(*set));
1147         if (set == NULL)
1148                 RETURN(-ENOMEM);
1149         lov_init_set(set);
1150
1151         set->set_oi = oinfo;
1152         set->set_exp = exp;
1153
1154         for (i = 0; i < oinfo->oi_md->lsm_stripe_count; i++) {
1155                 struct lov_oinfo *loi = oinfo->oi_md->lsm_oinfo[i];
1156                 struct lov_request *req;
1157                 obd_off rs, re;
1158
1159                 if (!lov_stripe_intersects(oinfo->oi_md, i,
1160                                            oinfo->oi_policy.l_extent.start,
1161                                            oinfo->oi_policy.l_extent.end,
1162                                            &rs, &re))
1163                         continue;
1164
1165                 if (!lov->lov_tgts[loi->loi_ost_idx] ||
1166                     !lov->lov_tgts[loi->loi_ost_idx]->ltd_active) {
1167                         CDEBUG(D_HA, "lov idx %d inactive\n", loi->loi_ost_idx);
1168                         GOTO(out_set, rc = -EIO);
1169                 }
1170
1171                 OBD_ALLOC(req, sizeof(*req));
1172                 if (req == NULL)
1173                         GOTO(out_set, rc = -ENOMEM);
1174                 req->rq_stripe = i;
1175                 req->rq_idx = loi->loi_ost_idx;
1176
1177                 OBDO_ALLOC(req->rq_oi.oi_oa);
1178                 if (req->rq_oi.oi_oa == NULL) {
1179                         OBD_FREE(req, sizeof(*req));
1180                         GOTO(out_set, rc = -ENOMEM);
1181                 }
1182                 memcpy(req->rq_oi.oi_oa, oinfo->oi_oa,
1183                        sizeof(*req->rq_oi.oi_oa));
1184                 req->rq_oi.oi_oa->o_id = loi->loi_id;
1185                 req->rq_oi.oi_oa->o_seq = loi->loi_seq;
1186                 req->rq_oi.oi_oa->o_valid |= OBD_MD_FLGROUP;
1187
1188                 req->rq_oi.oi_oa->o_stripe_idx = i;
1189                 req->rq_oi.oi_cb_up = cb_update_punch;
1190
1191                 req->rq_oi.oi_policy.l_extent.start = rs;
1192                 req->rq_oi.oi_policy.l_extent.end = re;
1193                 req->rq_oi.oi_policy.l_extent.gid = -1;
1194
1195                 req->rq_oi.oi_capa = oinfo->oi_capa;
1196
1197                 lov_set_add_req(req, set);
1198         }
1199         if (!set->set_count)
1200                 GOTO(out_set, rc = -EIO);
1201         *reqset = set;
1202         RETURN(rc);
1203 out_set:
1204         lov_fini_punch_set(set);
1205         RETURN(rc);
1206 }
1207
1208 int lov_fini_sync_set(struct lov_request_set *set)
1209 {
1210         int rc = 0;
1211         ENTRY;
1212
1213         if (set == NULL)
1214                 RETURN(0);
1215         LASSERT(set->set_exp);
1216         if (cfs_atomic_read(&set->set_completes)) {
1217                 if (!cfs_atomic_read(&set->set_success))
1218                         rc = -EIO;
1219                 /* FIXME update qos data here */
1220         }
1221
1222         lov_put_reqset(set);
1223
1224         RETURN(rc);
1225 }
1226
1227 /* The callback for osc_sync that finilizes a request info when a
1228  * response is recieved. */
1229 static int cb_sync_update(void *cookie, int rc)
1230 {
1231         struct obd_info *oinfo = cookie;
1232         struct lov_request *lovreq;
1233
1234         lovreq = container_of(oinfo, struct lov_request, rq_oi);
1235         return lov_update_common_set(lovreq->rq_rqset, lovreq, rc);
1236 }
1237
1238 int lov_prep_sync_set(struct obd_export *exp, struct obd_info *oinfo,
1239                       obd_off start, obd_off end,
1240                       struct lov_request_set **reqset)
1241 {
1242         struct lov_request_set *set;
1243         struct lov_obd *lov = &exp->exp_obd->u.lov;
1244         int rc = 0, i;
1245         ENTRY;
1246
1247         OBD_ALLOC_PTR(set);
1248         if (set == NULL)
1249                 RETURN(-ENOMEM);
1250         lov_init_set(set);
1251
1252         set->set_exp = exp;
1253         set->set_oi = oinfo;
1254
1255         for (i = 0; i < oinfo->oi_md->lsm_stripe_count; i++) {
1256                 struct lov_oinfo *loi = oinfo->oi_md->lsm_oinfo[i];
1257                 struct lov_request *req;
1258                 obd_off rs, re;
1259
1260                 if (!lov->lov_tgts[loi->loi_ost_idx] ||
1261                     !lov->lov_tgts[loi->loi_ost_idx]->ltd_active) {
1262                         CDEBUG(D_HA, "lov idx %d inactive\n", loi->loi_ost_idx);
1263                         continue;
1264                 }
1265
1266                 if (!lov_stripe_intersects(oinfo->oi_md, i, start, end, &rs,
1267                                            &re))
1268                         continue;
1269
1270                 OBD_ALLOC_PTR(req);
1271                 if (req == NULL)
1272                         GOTO(out_set, rc = -ENOMEM);
1273                 req->rq_stripe = i;
1274                 req->rq_idx = loi->loi_ost_idx;
1275
1276                 OBDO_ALLOC(req->rq_oi.oi_oa);
1277                 if (req->rq_oi.oi_oa == NULL) {
1278                         OBD_FREE(req, sizeof(*req));
1279                         GOTO(out_set, rc = -ENOMEM);
1280                 }
1281                 *req->rq_oi.oi_oa = *oinfo->oi_oa;
1282                 req->rq_oi.oi_oa->o_id = loi->loi_id;
1283                 req->rq_oi.oi_oa->o_seq = loi->loi_seq;
1284                 req->rq_oi.oi_oa->o_stripe_idx = i;
1285
1286                 req->rq_oi.oi_policy.l_extent.start = rs;
1287                 req->rq_oi.oi_policy.l_extent.end = re;
1288                 req->rq_oi.oi_policy.l_extent.gid = -1;
1289                 req->rq_oi.oi_cb_up = cb_sync_update;
1290
1291                 lov_set_add_req(req, set);
1292         }
1293         if (!set->set_count)
1294                 GOTO(out_set, rc = -EIO);
1295         *reqset = set;
1296         RETURN(rc);
1297 out_set:
1298         lov_fini_sync_set(set);
1299         RETURN(rc);
1300 }
1301
1302 #define LOV_U64_MAX ((__u64)~0ULL)
1303 #define LOV_SUM_MAX(tot, add)                                           \
1304         do {                                                            \
1305                 if ((tot) + (add) < (tot))                              \
1306                         (tot) = LOV_U64_MAX;                            \
1307                 else                                                    \
1308                         (tot) += (add);                                 \
1309         } while(0)
1310
1311 int lov_fini_statfs(struct obd_device *obd, struct obd_statfs *osfs,int success)
1312 {
1313         ENTRY;
1314
1315         if (success) {
1316                 __u32 expected_stripes = lov_get_stripecnt(&obd->u.lov,
1317                                                            LOV_MAGIC, 0);
1318                 if (osfs->os_files != LOV_U64_MAX)
1319                         lov_do_div64(osfs->os_files, expected_stripes);
1320                 if (osfs->os_ffree != LOV_U64_MAX)
1321                         lov_do_div64(osfs->os_ffree, expected_stripes);
1322
1323                 spin_lock(&obd->obd_osfs_lock);
1324                 memcpy(&obd->obd_osfs, osfs, sizeof(*osfs));
1325                 obd->obd_osfs_age = cfs_time_current_64();
1326                 spin_unlock(&obd->obd_osfs_lock);
1327                 RETURN(0);
1328         }
1329
1330         RETURN(-EIO);
1331 }
1332
1333 int lov_fini_statfs_set(struct lov_request_set *set)
1334 {
1335         int rc = 0;
1336         ENTRY;
1337
1338         if (set == NULL)
1339                 RETURN(0);
1340
1341         if (cfs_atomic_read(&set->set_completes)) {
1342                 rc = lov_fini_statfs(set->set_obd, set->set_oi->oi_osfs,
1343                                      cfs_atomic_read(&set->set_success));
1344         }
1345         lov_put_reqset(set);
1346         RETURN(rc);
1347 }
1348
1349 void lov_update_statfs(struct obd_statfs *osfs, struct obd_statfs *lov_sfs,
1350                        int success)
1351 {
1352         int shift = 0, quit = 0;
1353         __u64 tmp;
1354
1355         if (success == 0) {
1356                 memcpy(osfs, lov_sfs, sizeof(*lov_sfs));
1357         } else {
1358                 if (osfs->os_bsize != lov_sfs->os_bsize) {
1359                         /* assume all block sizes are always powers of 2 */
1360                         /* get the bits difference */
1361                         tmp = osfs->os_bsize | lov_sfs->os_bsize;
1362                         for (shift = 0; shift <= 64; ++shift) {
1363                                 if (tmp & 1) {
1364                                         if (quit)
1365                                                 break;
1366                                         else
1367                                                 quit = 1;
1368                                         shift = 0;
1369                                 }
1370                                 tmp >>= 1;
1371                         }
1372                 }
1373
1374                 if (osfs->os_bsize < lov_sfs->os_bsize) {
1375                         osfs->os_bsize = lov_sfs->os_bsize;
1376
1377                         osfs->os_bfree  >>= shift;
1378                         osfs->os_bavail >>= shift;
1379                         osfs->os_blocks >>= shift;
1380                 } else if (shift != 0) {
1381                         lov_sfs->os_bfree  >>= shift;
1382                         lov_sfs->os_bavail >>= shift;
1383                         lov_sfs->os_blocks >>= shift;
1384                 }
1385 #ifdef MIN_DF
1386                 /* Sandia requested that df (and so, statfs) only
1387                    returned minimal available space on
1388                    a single OST, so people would be able to
1389                    write this much data guaranteed. */
1390                 if (osfs->os_bavail > lov_sfs->os_bavail) {
1391                         /* Presumably if new bavail is smaller,
1392                            new bfree is bigger as well */
1393                         osfs->os_bfree = lov_sfs->os_bfree;
1394                         osfs->os_bavail = lov_sfs->os_bavail;
1395                 }
1396 #else
1397                 osfs->os_bfree += lov_sfs->os_bfree;
1398                 osfs->os_bavail += lov_sfs->os_bavail;
1399 #endif
1400                 osfs->os_blocks += lov_sfs->os_blocks;
1401                 /* XXX not sure about this one - depends on policy.
1402                  *   - could be minimum if we always stripe on all OBDs
1403                  *     (but that would be wrong for any other policy,
1404                  *     if one of the OBDs has no more objects left)
1405                  *   - could be sum if we stripe whole objects
1406                  *   - could be average, just to give a nice number
1407                  *
1408                  * To give a "reasonable" (if not wholly accurate)
1409                  * number, we divide the total number of free objects
1410                  * by expected stripe count (watch out for overflow).
1411                  */
1412                 LOV_SUM_MAX(osfs->os_files, lov_sfs->os_files);
1413                 LOV_SUM_MAX(osfs->os_ffree, lov_sfs->os_ffree);
1414         }
1415 }
1416
1417 /* The callback for osc_statfs_async that finilizes a request info when a
1418  * response is received. */
1419 static int cb_statfs_update(void *cookie, int rc)
1420 {
1421         struct obd_info *oinfo = cookie;
1422         struct lov_request *lovreq;
1423         struct lov_request_set *set;
1424         struct obd_statfs *osfs, *lov_sfs;
1425         struct lov_obd *lov;
1426         struct lov_tgt_desc *tgt;
1427         struct obd_device *lovobd, *tgtobd;
1428         int success;
1429         ENTRY;
1430
1431         lovreq = container_of(oinfo, struct lov_request, rq_oi);
1432         set = lovreq->rq_rqset;
1433         lovobd = set->set_obd;
1434         lov = &lovobd->u.lov;
1435         osfs = set->set_oi->oi_osfs;
1436         lov_sfs = oinfo->oi_osfs;
1437         success = cfs_atomic_read(&set->set_success);
1438         /* XXX: the same is done in lov_update_common_set, however
1439            lovset->set_exp is not initialized. */
1440         lov_update_set(set, lovreq, rc);
1441         if (rc)
1442                 GOTO(out, rc);
1443
1444         obd_getref(lovobd);
1445         tgt = lov->lov_tgts[lovreq->rq_idx];
1446         if (!tgt || !tgt->ltd_active)
1447                 GOTO(out_update, rc);
1448
1449         tgtobd = class_exp2obd(tgt->ltd_exp);
1450         spin_lock(&tgtobd->obd_osfs_lock);
1451         memcpy(&tgtobd->obd_osfs, lov_sfs, sizeof(*lov_sfs));
1452         if ((oinfo->oi_flags & OBD_STATFS_FROM_CACHE) == 0)
1453                 tgtobd->obd_osfs_age = cfs_time_current_64();
1454         spin_unlock(&tgtobd->obd_osfs_lock);
1455
1456 out_update:
1457         lov_update_statfs(osfs, lov_sfs, success);
1458         obd_putref(lovobd);
1459
1460 out:
1461         if (set->set_oi->oi_flags & OBD_STATFS_PTLRPCD &&
1462             lov_set_finished(set, 0)) {
1463                 lov_statfs_interpret(NULL, set, set->set_count !=
1464                                      cfs_atomic_read(&set->set_success));
1465         }
1466
1467         RETURN(0);
1468 }
1469
1470 int lov_prep_statfs_set(struct obd_device *obd, struct obd_info *oinfo,
1471                         struct lov_request_set **reqset)
1472 {
1473         struct lov_request_set *set;
1474         struct lov_obd *lov = &obd->u.lov;
1475         int rc = 0, i;
1476         ENTRY;
1477
1478         OBD_ALLOC(set, sizeof(*set));
1479         if (set == NULL)
1480                 RETURN(-ENOMEM);
1481         lov_init_set(set);
1482
1483         set->set_obd = obd;
1484         set->set_oi = oinfo;
1485
1486         /* We only get block data from the OBD */
1487         for (i = 0; i < lov->desc.ld_tgt_count; i++) {
1488                 struct lov_request *req;
1489
1490                 if (!lov->lov_tgts[i] || (!lov->lov_tgts[i]->ltd_active
1491                                           && (oinfo->oi_flags & OBD_STATFS_NODELAY))) {
1492                         CDEBUG(D_HA, "lov idx %d inactive\n", i);
1493                         continue;
1494                 }
1495
1496                 /* skip targets that have been explicitely disabled by the
1497                  * administrator */
1498                 if (!lov->lov_tgts[i]->ltd_exp) {
1499                         CDEBUG(D_HA, "lov idx %d administratively disabled\n", i);
1500                         continue;
1501                 }
1502
1503                 OBD_ALLOC(req, sizeof(*req));
1504                 if (req == NULL)
1505                         GOTO(out_set, rc = -ENOMEM);
1506
1507                 OBD_ALLOC(req->rq_oi.oi_osfs, sizeof(*req->rq_oi.oi_osfs));
1508                 if (req->rq_oi.oi_osfs == NULL) {
1509                         OBD_FREE(req, sizeof(*req));
1510                         GOTO(out_set, rc = -ENOMEM);
1511                 }
1512
1513                 req->rq_idx = i;
1514                 req->rq_oi.oi_cb_up = cb_statfs_update;
1515                 req->rq_oi.oi_flags = oinfo->oi_flags;
1516
1517                 lov_set_add_req(req, set);
1518         }
1519         if (!set->set_count)
1520                 GOTO(out_set, rc = -EIO);
1521         *reqset = set;
1522         RETURN(rc);
1523 out_set:
1524         lov_fini_statfs_set(set);
1525         RETURN(rc);
1526 }