lustre/osc/osc_create.c

   1 /* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
   2  * vim:expandtab:shiftwidth=8:tabstop=8:
   3  *
   4  * GPL HEADER START
   5  *
   6  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   7  *
   8  * This program is free software; you can redistribute it and/or modify
   9  * it under the terms of the GNU General Public License version 2 only,
  10  * as published by the Free Software Foundation.
  11  *
  12  * This program is distributed in the hope that it will be useful, but
  13  * WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  15  * General Public License version 2 for more details (a copy is included
  16  * in the LICENSE file that accompanied this code).
  17  *
  18  * You should have received a copy of the GNU General Public License
  19  * version 2 along with this program; If not, see
  20  * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
  21  *
  22  * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
  23  * CA 95054 USA or visit www.sun.com if you need additional information or
  24  * have any questions.
  25  *
  26  * GPL HEADER END
  27  */
  28 /*
  29  * Copyright  2008 Sun Microsystems, Inc. All rights reserved
  30  * Use is subject to license terms.
  31  */
  32 /*
  33  * This file is part of Lustre, http://www.lustre.org/
  34  * Lustre is a trademark of Sun Microsystems, Inc.
  35  *
  36  * lustre/osc/osc_create.c
  37  * For testing and management it is treated as an obd_device,
  38  * although * it does not export a full OBD method table (the
  39  * requests are coming * in over the wire, so object target modules
  40  * do not have a full * method table.)
  41  *
  42  * Author: Peter Braam <braam@clusterfs.com>
  43  */
  44
  45 #ifndef EXPORT_SYMTAB
  46 # define EXPORT_SYMTAB
  47 #endif
  48 #define DEBUG_SUBSYSTEM S_OSC
  49
  50 #ifdef __KERNEL__
  51 # include <libcfs/libcfs.h>
  52 #else /* __KERNEL__ */
  53 # include <liblustre.h>
  54 #endif
  55
  56 #ifdef  __CYGWIN__
  57 # include <ctype.h>
  58 #endif
  59
  60 #include <lustre_dlm.h>
  61 #include <obd_class.h>
  62 #include "osc_internal.h"
  63
  64 /* XXX need AT adjust ? */
  65 #define osc_create_timeout      (obd_timeout / 2)
  66
  67 struct osc_create_async_args {
  68         struct osc_creator      *rq_oscc;
  69         struct lov_stripe_md    *rq_lsm;
  70         struct obd_info         *rq_oinfo;
  71 };
  72
  73 static int oscc_internal_create(struct osc_creator *oscc);
  74 static int handle_async_create(struct ptlrpc_request *req, int rc);
  75
  76 static int osc_interpret_create(const struct lu_env *env,
  77                                 struct ptlrpc_request *req, void *data, int rc)
  78 {
  79         struct osc_creator *oscc;
  80         struct ost_body *body = NULL;
  81         struct ptlrpc_request *fake_req, *pos;
  82         ENTRY;
  83
  84         if (req->rq_repmsg) {
  85                 body = lustre_swab_repbuf(req, REPLY_REC_OFF, sizeof(*body),
  86                                           lustre_swab_ost_body);
  87                 if (body == NULL && rc == 0)
  88                         rc = -EPROTO;
  89         }
  90
  91         oscc = req->rq_async_args.pointer_arg[0];
  92         LASSERT(oscc && (oscc->oscc_obd != LP_POISON));
  93
  94         spin_lock(&oscc->oscc_lock);
  95         oscc->oscc_flags &= ~OSCC_FLAG_CREATING;
  96         switch (rc) {
  97         case 0: {
  98                 if (body) {
  99                         int diff = body->oa.o_id - oscc->oscc_last_id;
 100
 101                         /* oscc_internal_create() stores the original value of
 102                          * grow_count in rq_async_args.space[0].
 103                          * We can't compare against oscc_grow_count directly,
 104                          * because it may have been increased while the RPC
 105                          * is in flight, so we would always find ourselves
 106                          * having created fewer objects and decreasing the
 107                          * precreate request size.  b=18577 */
 108                         if (diff < (int) req->rq_async_args.space[0]) {
 109                                 /* the OST has not managed to create all the
 110                                  * objects we asked for */
 111                                 oscc->oscc_grow_count = max(diff,
 112                                                             OST_MIN_PRECREATE);
 113                                 /* don't bump grow_count next time */
 114                                 oscc->oscc_flags |= OSCC_FLAG_LOW;
 115                         } else {
 116                                 /* the OST is able to keep up with the work,
 117                                  * we could consider increasing grow_count
 118                                  * next time if needed */
 119                                 oscc->oscc_flags &= ~OSCC_FLAG_LOW;
 120                         }
 121                         oscc->oscc_last_id = body->oa.o_id;
 122                 }
 123                 spin_unlock(&oscc->oscc_lock);
 124                 break;
 125         }
 126         case -EROFS:
 127                 oscc->oscc_flags |= OSCC_FLAG_RDONLY;
 128         case -ENOSPC:
 129         case -EFBIG:
 130                 if (rc != -EROFS) {
 131                         oscc->oscc_flags |= OSCC_FLAG_NOSPC;
 132                         if (body && rc == -ENOSPC) {
 133                                 oscc->oscc_last_id = body->oa.o_id;
 134                                 oscc->oscc_grow_count = OST_MIN_PRECREATE;
 135                         }
 136                 }
 137                 spin_unlock(&oscc->oscc_lock);
 138                 DEBUG_REQ(D_INODE, req, "OST out of space, flagging");
 139                 break;
 140         case -EIO: {
 141                 /* filter always set body->oa.o_id as the last_id
 142                  * of filter (see filter_handle_precreate for detail)*/
 143                 if (body && body->oa.o_id > oscc->oscc_last_id)
 144                         oscc->oscc_last_id = body->oa.o_id;
 145                 spin_unlock(&oscc->oscc_lock);
 146                 break;
 147         }
 148         case -EWOULDBLOCK: {
 149                 /* aka EAGAIN we should not delay create if import failed -
 150                  * this avoid client stick in create and avoid race with
 151                  * delorphan */
 152                 oscc->oscc_flags |= OSCC_FLAG_RECOVERING;
 153                 /* oscc->oscc_grow_count = OST_MIN_PRECREATE; */
 154                 spin_unlock(&oscc->oscc_lock);
 155                 break;
 156         }
 157         default: {
 158                 oscc->oscc_flags |= OSCC_FLAG_RECOVERING;
 159                 oscc->oscc_grow_count = OST_MIN_PRECREATE;
 160                 spin_unlock(&oscc->oscc_lock);
 161                 DEBUG_REQ(D_ERROR, req,
 162                           "Unknown rc %d from async create: failing oscc", rc);
 163                 ptlrpc_fail_import(req->rq_import,
 164                                    lustre_msg_get_conn_cnt(req->rq_reqmsg));
 165         }
 166         }
 167
 168         CDEBUG(D_HA, "preallocated through id "LPU64" (next to use "LPU64")\n",
 169                oscc->oscc_last_id, oscc->oscc_next_id);
 170
 171         spin_lock(&oscc->oscc_lock);
 172         list_for_each_entry_safe(fake_req, pos,
 173                                  &oscc->oscc_wait_create_list, rq_list) {
 174                 if (handle_async_create(fake_req, rc)  == -EAGAIN) {
 175                         oscc_internal_create(oscc);
 176                         /* sending request should be never fail because
 177                          * osc use preallocated requests pool */
 178                         GOTO(exit_wakeup, rc);
 179                 }
 180         }
 181         spin_unlock(&oscc->oscc_lock);
 182
 183 exit_wakeup:
 184         cfs_waitq_signal(&oscc->oscc_waitq);
 185         RETURN(rc);
 186 }
 187
 188 static int oscc_internal_create(struct osc_creator *oscc)
 189 {
 190         struct ptlrpc_request *request;
 191         struct ost_body *body;
 192         __u32 size[] = { sizeof(struct ptlrpc_body), sizeof(*body) };
 193         ENTRY;
 194
 195         LASSERT_SPIN_LOCKED(&oscc->oscc_lock);
 196
 197         if ((oscc->oscc_flags & OSCC_FLAG_RECOVERING) ||
 198             (oscc->oscc_flags & OSCC_FLAG_DEGRADED)) {
 199                 spin_unlock(&oscc->oscc_lock);
 200                 RETURN(0);
 201         }
 202
 203         /* we need check it before OSCC_FLAG_CREATING - because need
 204          * see lower number of precreate objects */
 205         if (oscc->oscc_grow_count < oscc->oscc_max_grow_count &&
 206             ((oscc->oscc_flags & OSCC_FLAG_LOW) == 0) &&
 207             (__s64)(oscc->oscc_last_id - oscc->oscc_next_id) <=
 208                    (oscc->oscc_grow_count / 4 + 1)) {
 209                 oscc->oscc_flags |= OSCC_FLAG_LOW;
 210                 oscc->oscc_grow_count *= 2;
 211         }
 212
 213         if (oscc->oscc_flags & OSCC_FLAG_CREATING) {
 214                 spin_unlock(&oscc->oscc_lock);
 215                 RETURN(0);
 216         }
 217
 218         if (oscc->oscc_grow_count > oscc->oscc_max_grow_count / 2)
 219                 oscc->oscc_grow_count = oscc->oscc_max_grow_count / 2;
 220
 221         oscc->oscc_flags |= OSCC_FLAG_CREATING;
 222         spin_unlock(&oscc->oscc_lock);
 223
 224         request = ptlrpc_prep_req(oscc->oscc_obd->u.cli.cl_import,
 225                                   LUSTRE_OST_VERSION, OST_CREATE, 2,
 226                                   size, NULL);
 227         if (request == NULL) {
 228                 spin_lock(&oscc->oscc_lock);
 229                 oscc->oscc_flags &= ~OSCC_FLAG_CREATING;
 230                 spin_unlock(&oscc->oscc_lock);
 231                 RETURN(-ENOMEM);
 232         }
 233
 234         request->rq_request_portal = OST_CREATE_PORTAL;
 235         ptlrpc_at_set_req_timeout(request);
 236         body = lustre_msg_buf(request->rq_reqmsg, REQ_REC_OFF, sizeof(*body));
 237
 238         spin_lock(&oscc->oscc_lock);
 239         body->oa.o_id = oscc->oscc_last_id + oscc->oscc_grow_count;
 240         body->oa.o_gr = oscc->oscc_oa.o_gr;
 241         LASSERT_MDS_GROUP(body->oa.o_gr);
 242         body->oa.o_valid |= OBD_MD_FLID | OBD_MD_FLGROUP;
 243         request->rq_async_args.space[0] = oscc->oscc_grow_count;
 244         spin_unlock(&oscc->oscc_lock);
 245         CDEBUG(D_RPCTRACE, "prealloc through id "LPU64" (last seen "LPU64")\n",
 246                body->oa.o_id, oscc->oscc_last_id);
 247
 248         /* we should not resend create request - anyway we will have delorphan
 249          * and kill these objects */
 250         request->rq_no_delay = request->rq_no_resend = 1;
 251         ptlrpc_req_set_repsize(request, 2, size);
 252
 253         request->rq_async_args.pointer_arg[0] = oscc;
 254         request->rq_interpret_reply = osc_interpret_create;
 255         ptlrpcd_add_req(request, PSCOPE_OTHER);
 256
 257         RETURN(0);
 258 }
 259
 260 static int oscc_has_objects_nolock(struct osc_creator *oscc, int count)
 261 {
 262         return ((__s64)(oscc->oscc_last_id - oscc->oscc_next_id) >= count);
 263 }
 264
 265
 266 static int oscc_has_objects(struct osc_creator *oscc, int count)
 267 {
 268         int have_objs;
 269
 270         spin_lock(&oscc->oscc_lock);
 271         have_objs = oscc_has_objects_nolock(oscc, count);
 272         spin_unlock(&oscc->oscc_lock);
 273
 274         return have_objs;
 275 }
 276
 277 static int oscc_wait_for_objects(struct osc_creator *oscc, int count)
 278 {
 279         int have_objs;
 280         int ost_unusable;
 281
 282         ost_unusable = oscc->oscc_obd->u.cli.cl_import->imp_invalid;
 283
 284         spin_lock(&oscc->oscc_lock);
 285         ost_unusable |= (OSCC_FLAG_NOSPC | OSCC_FLAG_RDONLY |
 286                          OSCC_FLAG_EXITING) & oscc->oscc_flags;
 287         have_objs = oscc_has_objects_nolock(oscc, count);
 288
 289         if (!ost_unusable && !have_objs)
 290                 /* they release lock himself */
 291                 have_objs = oscc_internal_create(oscc);
 292         else
 293                 spin_unlock(&oscc->oscc_lock);
 294
 295         return have_objs || ost_unusable;
 296 }
 297
 298 static int oscc_precreate(struct osc_creator *oscc)
 299 {
 300         struct l_wait_info lwi;
 301         int rc = 0;
 302         ENTRY;
 303
 304         if (oscc_has_objects(oscc, oscc->oscc_grow_count / 2))
 305                 RETURN(0);
 306
 307         /* we should be not block forever - because client's create rpc can
 308          * stick in mds for long time and forbid client reconnect */
 309         lwi = LWI_TIMEOUT(cfs_timeout_cap(cfs_time_seconds(osc_create_timeout)),
 310                           NULL, NULL);
 311
 312         rc = l_wait_event(oscc->oscc_waitq, oscc_wait_for_objects(oscc, 1), &lwi);
 313         RETURN(rc);
 314 }
 315
 316 static int oscc_in_sync(struct osc_creator *oscc)
 317 {
 318         int sync;
 319
 320         spin_lock(&oscc->oscc_lock);
 321         sync = oscc->oscc_flags & OSCC_FLAG_SYNC_IN_PROGRESS;
 322         spin_unlock(&oscc->oscc_lock);
 323
 324         return sync;
 325 }
 326
 327 /* decide if the OST has remaining object, return value :
 328         0 : the OST has remaining object, and don't need to do precreate.
 329         1 : the OST has no remaining object, and will send a RPC for precreate.
 330         2 : the OST has no remaining object, and will not get any for
 331             a potentially very long time
 332      1000 : unusable
 333  */
 334 int osc_precreate(struct obd_export *exp)
 335 {
 336         struct osc_creator *oscc = &exp->exp_obd->u.cli.cl_oscc;
 337         struct obd_import *imp = exp->exp_imp_reverse;
 338         ENTRY;
 339
 340         LASSERT(oscc != NULL);
 341         if (imp != NULL && imp->imp_deactive)
 342                 RETURN(1000);
 343
 344         /* Handle critical states first */
 345         spin_lock(&oscc->oscc_lock);
 346         if (oscc->oscc_flags & OSCC_FLAG_NOSPC ||
 347             oscc->oscc_flags & OSCC_FLAG_RDONLY ||
 348             oscc->oscc_flags & OSCC_FLAG_EXITING) {
 349                 spin_unlock(&oscc->oscc_lock);
 350                 RETURN(1000);
 351         }
 352
 353         if (oscc->oscc_flags & OSCC_FLAG_RECOVERING ||
 354             oscc->oscc_flags & OSCC_FLAG_DEGRADED) {
 355                 spin_unlock(&oscc->oscc_lock);
 356                 RETURN(2);
 357         }
 358
 359         if (oscc_has_objects_nolock(oscc, oscc->oscc_grow_count / 2)) {
 360                 spin_unlock(&oscc->oscc_lock);
 361                 RETURN(0);
 362         }
 363
 364         if ((oscc->oscc_flags & OSCC_FLAG_SYNC_IN_PROGRESS) ||
 365             (oscc->oscc_flags & OSCC_FLAG_CREATING)) {
 366                 spin_unlock(&oscc->oscc_lock);
 367                 RETURN(1);
 368         }
 369
 370         if (oscc_internal_create(oscc))
 371                 RETURN(1000);
 372         RETURN(1);
 373 }
 374
 375 static int handle_async_create(struct ptlrpc_request *req, int rc)
 376 {
 377         struct osc_create_async_args *args = ptlrpc_req_async_args(req);
 378         struct osc_creator    *oscc = args->rq_oscc;
 379         struct lov_stripe_md  *lsm  = args->rq_lsm;
 380         struct obd_info       *oinfo = args->rq_oinfo;
 381         struct obdo           *oa = oinfo->oi_oa;
 382
 383         LASSERT_SPIN_LOCKED(&oscc->oscc_lock);
 384
 385         if(rc)
 386                 GOTO(out_wake, rc);
 387
 388         /* Handle the critical type errors first.
 389          * Should we also test cl_import state as well ? */
 390         if (oscc->oscc_flags & OSCC_FLAG_EXITING)
 391                 GOTO(out_wake, rc = -EIO);
 392
 393         if (oscc->oscc_flags & OSCC_FLAG_NOSPC)
 394                 GOTO(out_wake, rc = -ENOSPC);
 395
 396         if (oscc->oscc_flags & OSCC_FLAG_RDONLY)
 397                 GOTO(out_wake, rc = -EROFS);
 398
 399         /* should be try wait until recovery finished */
 400         if((oscc->oscc_flags & OSCC_FLAG_RECOVERING) ||
 401            (oscc->oscc_flags & OSCC_FLAG_DEGRADED))
 402                 RETURN(-EAGAIN);
 403
 404         if (oscc_has_objects_nolock(oscc, 1)) {
 405                 memcpy(oa, &oscc->oscc_oa, sizeof(*oa));
 406                 oa->o_id = oscc->oscc_next_id;
 407                 lsm->lsm_object_id = oscc->oscc_next_id;
 408                 oscc->oscc_next_id++;
 409
 410                 CDEBUG(D_RPCTRACE, " set oscc_next_id = "LPU64"\n",
 411                        oscc->oscc_next_id);
 412                 GOTO(out_wake, rc = 0);
 413         }
 414
 415         /* we don't have objects now - continue wait */
 416         RETURN(-EAGAIN);
 417
 418 out_wake:
 419
 420         rc = oinfo->oi_cb_up(oinfo, rc);
 421         ptlrpc_fakereq_finished(req);
 422
 423         RETURN(rc);
 424 }
 425
 426 static int async_create_interpret(const struct lu_env *env,
 427                                   struct ptlrpc_request *req, void *data, int rc)
 428 {
 429         struct osc_create_async_args *args = ptlrpc_req_async_args(req);
 430         struct osc_creator    *oscc = args->rq_oscc;
 431         int ret;
 432
 433         spin_lock(&oscc->oscc_lock);
 434         ret = handle_async_create(req, rc);
 435         spin_unlock(&oscc->oscc_lock);
 436
 437         return ret;
 438 }
 439
 440 int osc_create_async(struct obd_export *exp, struct obd_info *oinfo,
 441                      struct lov_stripe_md **ea, struct obd_trans_info *oti)
 442 {
 443         int rc;
 444         struct ptlrpc_request *fake_req;
 445         struct osc_create_async_args *args;
 446         struct osc_creator *oscc = &exp->exp_obd->u.cli.cl_oscc;
 447         struct obdo *oa = oinfo->oi_oa;
 448         ENTRY;
 449
 450         if ((oa->o_valid & OBD_MD_FLGROUP) && !filter_group_is_mds(oa->o_gr)) {
 451                 rc = osc_real_create(exp, oinfo->oi_oa, ea, oti);
 452                 rc = oinfo->oi_cb_up(oinfo, rc);
 453                 RETURN(rc);
 454         }
 455
 456         if ((oa->o_valid & OBD_MD_FLFLAGS) &&
 457             oa->o_flags == OBD_FL_RECREATE_OBJS) {
 458                 rc = osc_real_create(exp, oinfo->oi_oa, ea, oti);
 459                 rc = oinfo->oi_cb_up(oinfo, rc);
 460                 RETURN(rc);
 461         }
 462
 463         LASSERT((*ea) != NULL);
 464
 465         fake_req = ptlrpc_prep_fakereq(oscc->oscc_obd->u.cli.cl_import,
 466                                        osc_create_timeout,
 467                                        async_create_interpret);
 468         if (fake_req == NULL) {
 469                 rc = oinfo->oi_cb_up(oinfo, -ENOMEM);
 470                 RETURN(-ENOMEM);
 471         }
 472
 473         args = ptlrpc_req_async_args(fake_req);
 474         CLASSERT(sizeof(*args) <= sizeof(fake_req->rq_async_args));
 475
 476         args->rq_oscc  = oscc;
 477         args->rq_lsm   = *ea;
 478         args->rq_oinfo = oinfo;
 479
 480         spin_lock(&oscc->oscc_lock);
 481         /* try fast path */
 482         rc = handle_async_create(fake_req, 0);
 483         if (rc == -EAGAIN) {
 484                 int is_add;
 485                 /* we not have objects - try wait */
 486                 is_add = ptlrpcd_add_req(fake_req, PSCOPE_OTHER);
 487                 if (!is_add)
 488                         list_add(&fake_req->rq_list,
 489                                  &oscc->oscc_wait_create_list);
 490                 else
 491                         rc = is_add;
 492         }
 493         spin_unlock(&oscc->oscc_lock);
 494
 495         if (rc != -EAGAIN)
 496                 /* need free request if was error hit or
 497                  * objects already allocated */
 498                 ptlrpc_req_finished(fake_req);
 499         else
 500                 /* EAGAIN mean - request is delayed */
 501                 rc = 0;
 502
 503         RETURN(rc);
 504 }
 505
 506 int osc_create(struct obd_export *exp, struct obdo *oa,
 507                struct lov_stripe_md **ea, struct obd_trans_info *oti)
 508 {
 509         struct osc_creator *oscc = &exp->exp_obd->u.cli.cl_oscc;
 510         struct obd_import  *imp  = exp->exp_obd->u.cli.cl_import;
 511         struct lov_stripe_md *lsm;
 512         int del_orphan = 0, rc = 0;
 513         ENTRY;
 514
 515         LASSERT(oa);
 516         LASSERT(ea);
 517         LASSERT(oa->o_valid & OBD_MD_FLGROUP);
 518
 519         if ((oa->o_valid & OBD_MD_FLFLAGS) &&
 520             oa->o_flags == OBD_FL_RECREATE_OBJS) {
 521                 RETURN(osc_real_create(exp, oa, ea, oti));
 522         }
 523
 524         if (!filter_group_is_mds(oa->o_gr))
 525                 RETURN(osc_real_create(exp, oa, ea, oti));
 526
 527         /* this is the special case where create removes orphans */
 528         if (oa->o_valid & OBD_MD_FLFLAGS &&
 529             oa->o_flags == OBD_FL_DELORPHAN) {
 530                 spin_lock(&oscc->oscc_lock);
 531                 if (oscc->oscc_flags & OSCC_FLAG_SYNC_IN_PROGRESS) {
 532                         spin_unlock(&oscc->oscc_lock);
 533                         RETURN(-EBUSY);
 534                 }
 535                 if (!(oscc->oscc_flags & OSCC_FLAG_RECOVERING)) {
 536                         spin_unlock(&oscc->oscc_lock);
 537                         RETURN(0);
 538                 }
 539
 540                 oscc->oscc_flags |= OSCC_FLAG_SYNC_IN_PROGRESS;
 541                 /* seting flag LOW we prevent extra grow precreate size
 542                  * and enforce use last assigned size */
 543                 oscc->oscc_flags |= OSCC_FLAG_LOW;
 544                 spin_unlock(&oscc->oscc_lock);
 545                 CDEBUG(D_HA, "%s: oscc recovery started - delete to "LPU64"\n",
 546                        oscc->oscc_obd->obd_name, oscc->oscc_next_id - 1);
 547
 548                 del_orphan = 1;
 549
 550                 /* delete from next_id on up */
 551                 oa->o_valid |= OBD_MD_FLID;
 552                 oa->o_id = oscc->oscc_next_id - 1;
 553
 554                 rc = osc_real_create(exp, oa, ea, NULL);
 555
 556                 spin_lock(&oscc->oscc_lock);
 557                 oscc->oscc_flags &= ~OSCC_FLAG_SYNC_IN_PROGRESS;
 558                 if (rc == 0 || rc == -ENOSPC) {
 559                         struct obd_connect_data *ocd;
 560
 561                         if (rc == -ENOSPC)
 562                                 oscc->oscc_flags |= OSCC_FLAG_NOSPC;
 563                         oscc->oscc_flags &= ~OSCC_FLAG_RECOVERING;
 564
 565                         oscc->oscc_last_id = oa->o_id;
 566                         ocd = &imp->imp_connect_data;
 567                         if (ocd->ocd_connect_flags & OBD_CONNECT_SKIP_ORPHAN) {
 568                                 CDEBUG(D_HA, "%s: Skip orphan set, reset last "
 569                                        "objid\n", oscc->oscc_obd->obd_name);
 570                                 oscc->oscc_next_id = oa->o_id + 1;
 571                         }
 572
 573                         /* sanity check for next objid. see bug 17025 */
 574                         LASSERT(oscc->oscc_next_id == oa->o_id + 1);
 575
 576                         CDEBUG(D_HA, "%s: oscc recovery finished, last_id: "
 577                                LPU64", rc: %d\n", oscc->oscc_obd->obd_name,
 578                                oscc->oscc_last_id, rc);
 579                 } else {
 580                         CDEBUG(D_ERROR, "%s: oscc recovery failed: %d\n",
 581                                oscc->oscc_obd->obd_name, rc);
 582                 }
 583
 584                 cfs_waitq_signal(&oscc->oscc_waitq);
 585                 spin_unlock(&oscc->oscc_lock);
 586
 587                 if (rc < 0)
 588                         RETURN(rc);
 589         }
 590
 591         lsm = *ea;
 592         if (lsm == NULL) {
 593                 rc = obd_alloc_memmd(exp, &lsm);
 594                 if (rc < 0)
 595                         RETURN(rc);
 596         }
 597
 598         while (1) {
 599                 if (oscc_in_sync(oscc))
 600                         CDEBUG(D_HA,"%s: oscc recovery in progress, waiting\n",
 601                                oscc->oscc_obd->obd_name);
 602
 603                 rc = oscc_precreate(oscc);
 604                 if (rc)
 605                         CDEBUG(D_HA,"%s: error create %d\n",
 606                                oscc->oscc_obd->obd_name, rc);
 607
 608                 spin_lock(&oscc->oscc_lock);
 609
 610                 /* wakeup but recovery did not finished */
 611                 if ((oscc->oscc_obd->u.cli.cl_import->imp_invalid) ||
 612                     (oscc->oscc_flags & OSCC_FLAG_RECOVERING)) {
 613                         rc = -EIO;
 614                         spin_unlock(&oscc->oscc_lock);
 615                         break;
 616                 }
 617
 618                 if (oscc->oscc_flags & OSCC_FLAG_NOSPC) {
 619                         rc = -ENOSPC;
 620                         spin_unlock(&oscc->oscc_lock);
 621                         break;
 622                 }
 623
 624                 if (oscc->oscc_flags & OSCC_FLAG_RDONLY) {
 625                         rc = -EROFS;
 626                         spin_unlock(&oscc->oscc_lock);
 627                         break;
 628                 }
 629
 630                 // Should we report -EIO error ?
 631                 if (oscc->oscc_flags & OSCC_FLAG_EXITING) {
 632                         spin_unlock(&oscc->oscc_lock);
 633                         break;
 634                 }
 635
 636                 if (oscc_has_objects_nolock(oscc, 1)) {
 637                         memcpy(oa, &oscc->oscc_oa, sizeof(*oa));
 638                         oa->o_id = oscc->oscc_next_id;
 639                         lsm->lsm_object_id = oscc->oscc_next_id;
 640                         *ea = lsm;
 641                         oscc->oscc_next_id++;
 642                         spin_unlock(&oscc->oscc_lock);
 643
 644                         CDEBUG(D_RPCTRACE, "%s: set oscc_next_id = "LPU64"\n",
 645                                exp->exp_obd->obd_name, oscc->oscc_next_id);
 646                         break;
 647                 }
 648
 649                 spin_unlock(&oscc->oscc_lock);
 650         }
 651
 652         if (rc == 0) {
 653                 CDEBUG(D_INFO, "%s: returning objid "LPU64"\n",
 654                        obd2cli_tgt(oscc->oscc_obd), lsm->lsm_object_id);
 655         } else {
 656                 if (*ea == NULL)
 657                         obd_free_memmd(exp, &lsm);
 658                 if (del_orphan != 0 && rc != -EIO)
 659                         /* Ignore non-IO precreate error for clear orphan */
 660                         rc = 0;
 661         }
 662         RETURN(rc);
 663 }
 664
 665 void oscc_init(struct obd_device *obd)
 666 {
 667         struct osc_creator *oscc;
 668
 669         if (obd == NULL)
 670                 return;
 671
 672         oscc = &obd->u.cli.cl_oscc;
 673
 674         memset(oscc, 0, sizeof(*oscc));
 675
 676         cfs_waitq_init(&oscc->oscc_waitq);
 677         spin_lock_init(&oscc->oscc_lock);
 678         oscc->oscc_obd = obd;
 679         oscc->oscc_grow_count = OST_MIN_PRECREATE;
 680         oscc->oscc_max_grow_count = OST_MAX_PRECREATE;
 681
 682         oscc->oscc_next_id = 2;
 683         oscc->oscc_last_id = 1;
 684         oscc->oscc_flags |= OSCC_FLAG_RECOVERING;
 685
 686         CFS_INIT_LIST_HEAD(&oscc->oscc_wait_create_list);
 687
 688         /* XXX the export handle should give the oscc the last object */
 689         /* oed->oed_oscc.oscc_last_id = exph->....; */
 690 }
 691
 692 void oscc_fini(struct obd_device *obd)
 693 {
 694         struct osc_creator *oscc = &obd->u.cli.cl_oscc;
 695         ENTRY;
 696
 697
 698         spin_lock(&oscc->oscc_lock);
 699         oscc->oscc_flags &= ~OSCC_FLAG_RECOVERING;
 700         oscc->oscc_flags |= OSCC_FLAG_EXITING;
 701         spin_unlock(&oscc->oscc_lock);
 702 }