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