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 (c) 2003, 2010, Oracle and/or its affiliates. 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 <obd.h>
  63 #include "osc_internal.h"
  64
  65 /* XXX need AT adjust ? */
  66 #define osc_create_timeout      (obd_timeout / 2)
  67
  68 struct osc_create_async_args {
  69         struct osc_creator      *rq_oscc;
  70         struct lov_stripe_md    *rq_lsm;
  71         struct obd_info         *rq_oinfo;
  72 };
  73
  74 static int oscc_internal_create(struct osc_creator *oscc);
  75 static int handle_async_create(struct ptlrpc_request *req, int rc);
  76
  77 static int osc_interpret_create(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 -EINTR:
 149         case -EWOULDBLOCK: {
 150                 /* aka EAGAIN we should not delay create if import failed -
 151                  * this avoid client stick in create and avoid race with delorphan */
 152                 /* EINTR means old create request was killed due to mds<>ost
 153                  * eviction. OSCC_FLAG_RECOVERING can already be set due
 154                  * IMP_DISCONN event */
 155                 oscc->oscc_flags |= OSCC_FLAG_RECOVERING;
 156                 /* oscc->oscc_grow_count = OST_MIN_PRECREATE; */
 157                 spin_unlock(&oscc->oscc_lock);
 158                 break;
 159         }
 160         default: {
 161                 oscc->oscc_flags |= OSCC_FLAG_RECOVERING;
 162                 oscc->oscc_grow_count = OST_MIN_PRECREATE;
 163                 spin_unlock(&oscc->oscc_lock);
 164                 DEBUG_REQ(D_ERROR, req,
 165                           "unknown rc %d from async create: failing oscc", rc);
 166                 ptlrpc_fail_import(req->rq_import,
 167                                    lustre_msg_get_conn_cnt(req->rq_reqmsg));
 168         }
 169         }
 170
 171         CDEBUG(D_RPCTRACE, "prealloc through id "LPU64", next to use "LPU64"\n",
 172                oscc->oscc_last_id, oscc->oscc_next_id);
 173
 174         spin_lock(&oscc->oscc_lock);
 175         list_for_each_entry_safe(fake_req, pos,
 176                                  &oscc->oscc_wait_create_list, rq_list) {
 177                 if (handle_async_create(fake_req, rc)  == -EAGAIN) {
 178                         oscc_internal_create(oscc);
 179                         /* sending request should be never fail because
 180                          * osc use preallocated requests pool */
 181                         GOTO(exit_wakeup, rc);
 182                 }
 183         }
 184         spin_unlock(&oscc->oscc_lock);
 185
 186 exit_wakeup:
 187         cfs_waitq_signal(&oscc->oscc_waitq);
 188         RETURN(rc);
 189 }
 190
 191 static int oscc_internal_create(struct osc_creator *oscc)
 192 {
 193         struct ptlrpc_request *request;
 194         struct ost_body *body;
 195         __u32 size[] = { sizeof(struct ptlrpc_body), sizeof(*body) };
 196         ENTRY;
 197
 198         LASSERT_SPIN_LOCKED(&oscc->oscc_lock);
 199
 200         /* Do not check for a degraded OST here - bug21563/bug18539 */
 201         if (oscc->oscc_flags & OSCC_FLAG_RECOVERING) {
 202                 spin_unlock(&oscc->oscc_lock);
 203                 RETURN(0);
 204         }
 205
 206         /* we need check it before OSCC_FLAG_CREATING - because need
 207          * see lower number of precreate objects */
 208         if (oscc->oscc_grow_count < oscc->oscc_max_grow_count &&
 209             ((oscc->oscc_flags & OSCC_FLAG_LOW) == 0) &&
 210             (__s64)(oscc->oscc_last_id - oscc->oscc_next_id) <=
 211                    (oscc->oscc_grow_count / 4 + 1)) {
 212                 oscc->oscc_flags |= OSCC_FLAG_LOW;
 213                 oscc->oscc_grow_count *= 2;
 214         }
 215
 216         if (oscc->oscc_flags & OSCC_FLAG_CREATING) {
 217                 spin_unlock(&oscc->oscc_lock);
 218                 RETURN(0);
 219         }
 220
 221         if (oscc->oscc_grow_count > oscc->oscc_max_grow_count / 2)
 222                 oscc->oscc_grow_count = oscc->oscc_max_grow_count / 2;
 223
 224         oscc->oscc_flags |= OSCC_FLAG_CREATING;
 225         spin_unlock(&oscc->oscc_lock);
 226
 227         request = ptlrpc_prep_req(oscc->oscc_obd->u.cli.cl_import,
 228                                   LUSTRE_OST_VERSION, OST_CREATE, 2,
 229                                   size, NULL);
 230         if (request == NULL) {
 231                 spin_lock(&oscc->oscc_lock);
 232                 oscc->oscc_flags &= ~OSCC_FLAG_CREATING;
 233                 spin_unlock(&oscc->oscc_lock);
 234                 RETURN(-ENOMEM);
 235         }
 236
 237         request->rq_request_portal = OST_CREATE_PORTAL;
 238         ptlrpc_at_set_req_timeout(request);
 239         body = lustre_msg_buf(request->rq_reqmsg, REQ_REC_OFF, sizeof(*body));
 240
 241         spin_lock(&oscc->oscc_lock);
 242         body->oa.o_id = oscc->oscc_last_id + oscc->oscc_grow_count;
 243         body->oa.o_gr = 0;
 244         body->oa.o_valid |= OBD_MD_FLID | OBD_MD_FLGROUP;
 245         request->rq_async_args.space[0] = oscc->oscc_grow_count;
 246         spin_unlock(&oscc->oscc_lock);
 247         CDEBUG(D_RPCTRACE, "prealloc through id "LPU64" (last seen "LPU64")\n",
 248                body->oa.o_id, oscc->oscc_last_id);
 249
 250         /* we should not resend create request - anyway we will have delorphan
 251          * and kill these objects */
 252         request->rq_no_delay = request->rq_no_resend = 1;
 253         ptlrpc_req_set_repsize(request, 2, size);
 254
 255         request->rq_async_args.pointer_arg[0] = oscc;
 256         request->rq_interpret_reply = osc_interpret_create;
 257         ptlrpcd_add_req(request);
 258
 259         RETURN(0);
 260 }
 261
 262 static int oscc_has_objects_nolock(struct osc_creator *oscc, int count)
 263 {
 264         return ((__s64)(oscc->oscc_last_id - oscc->oscc_next_id) >= count);
 265 }
 266
 267
 268 static int oscc_has_objects(struct osc_creator *oscc, int count)
 269 {
 270         int have_objs;
 271
 272         spin_lock(&oscc->oscc_lock);
 273         have_objs = oscc_has_objects_nolock(oscc, count);
 274         spin_unlock(&oscc->oscc_lock);
 275
 276         return have_objs;
 277 }
 278
 279 static int oscc_wait_for_objects(struct osc_creator *oscc, int count)
 280 {
 281         int have_objs;
 282         int ost_unusable;
 283
 284         ost_unusable = oscc->oscc_obd->u.cli.cl_import->imp_invalid;
 285
 286         spin_lock(&oscc->oscc_lock);
 287         ost_unusable |= (OSCC_FLAG_NOSPC | OSCC_FLAG_RDONLY |
 288                          OSCC_FLAG_EXITING) & oscc->oscc_flags;
 289         have_objs = oscc_has_objects_nolock(oscc, count);
 290
 291         if (!ost_unusable && !have_objs)
 292                 /* they release lock himself */
 293                 have_objs = oscc_internal_create(oscc);
 294         else
 295                 spin_unlock(&oscc->oscc_lock);
 296
 297         return have_objs || ost_unusable;
 298 }
 299
 300 static int oscc_precreate(struct osc_creator *oscc)
 301 {
 302         struct l_wait_info lwi;
 303         int rc = 0;
 304         ENTRY;
 305
 306         if (oscc_has_objects(oscc, oscc->oscc_grow_count / 2))
 307                 RETURN(0);
 308
 309         /* we should be not block forever - because client's create rpc can
 310          * stick in mds for long time and forbid client reconnect */
 311         lwi = LWI_TIMEOUT(cfs_timeout_cap(cfs_time_seconds(osc_create_timeout)),
 312                           NULL, NULL);
 313
 314         rc = l_wait_event(oscc->oscc_waitq, oscc_wait_for_objects(oscc, 1), &lwi);
 315         RETURN(rc);
 316 }
 317
 318 static int oscc_in_sync(struct osc_creator *oscc)
 319 {
 320         int sync;
 321
 322         spin_lock(&oscc->oscc_lock);
 323         sync = oscc->oscc_flags & OSCC_FLAG_SYNC_IN_PROGRESS;
 324         spin_unlock(&oscc->oscc_lock);
 325
 326         return sync;
 327 }
 328
 329 /* decide if the OST has remaining object, return value :
 330         0 : the OST has remaining objects, may or may not send precreation RPC.
 331         1 : the OST has no remaining object, and the sent precreation RPC
 332             has not been completed yet.
 333         2 : the OST has no remaining object, and will not get any for
 334             a potentially very long time
 335      1000 : unusable
 336  */
 337 int osc_precreate(struct obd_export *exp)
 338 {
 339         struct osc_creator *oscc = &exp->exp_obd->u.cli.cl_oscc;
 340         struct obd_import *imp = exp->exp_imp_reverse;
 341         int rc;
 342         ENTRY;
 343
 344         LASSERT(oscc != NULL);
 345         if (imp != NULL && imp->imp_deactive)
 346                 GOTO(out_nolock, rc = 1000);
 347
 348         /* Handle critical states first */
 349         spin_lock(&oscc->oscc_lock);
 350         if (oscc->oscc_flags & OSCC_FLAG_NOSPC ||
 351             oscc->oscc_flags & OSCC_FLAG_RDONLY ||
 352             oscc->oscc_flags & OSCC_FLAG_EXITING)
 353                 GOTO(out, rc = 1000);
 354
 355         if (oscc->oscc_flags & OSCC_FLAG_RECOVERING ||
 356             oscc->oscc_flags & OSCC_FLAG_DEGRADED)
 357                 GOTO(out, rc = 2);
 358
 359         if (oscc_has_objects_nolock(oscc, oscc->oscc_grow_count / 2))
 360                 GOTO(out, rc = 0);
 361
 362         /* Return 0, if we have at least one object - bug 22884 */
 363         rc = oscc_has_objects_nolock(oscc, 1) ? 0 : 1;
 364
 365         /* Do not check for OSCC_FLAG_CREATING flag here, let
 366          * osc_precreate() call oscc_internal_create() and
 367          * adjust oscc_grow_count bug21563 */
 368         if (oscc->oscc_flags & OSCC_FLAG_SYNC_IN_PROGRESS)
 369                 GOTO(out, rc);
 370
 371         if (oscc_internal_create(oscc))
 372                 GOTO(out_nolock, rc = 1000);
 373
 374         RETURN(rc);
 375 out:
 376         spin_unlock(&oscc->oscc_lock);
 377 out_nolock:
 378         return rc;
 379 }
 380
 381 static int handle_async_create(struct ptlrpc_request *req, int rc)
 382 {
 383         struct osc_create_async_args *args = ptlrpc_req_async_args(req);
 384         struct osc_creator    *oscc = args->rq_oscc;
 385         struct lov_stripe_md  *lsm  = args->rq_lsm;
 386         struct obd_info       *oinfo = args->rq_oinfo;
 387         struct obdo           *oa = oinfo->oi_oa;
 388
 389         LASSERT_SPIN_LOCKED(&oscc->oscc_lock);
 390
 391         if(rc)
 392                 GOTO(out_wake, rc);
 393
 394         /* Handle the critical type errors first.
 395          * Should we also test cl_import state as well ? */
 396         if (oscc->oscc_flags & OSCC_FLAG_EXITING)
 397                 GOTO(out_wake, rc = -EIO);
 398
 399         if (oscc->oscc_flags & OSCC_FLAG_NOSPC)
 400                 GOTO(out_wake, rc = -ENOSPC);
 401
 402         if (oscc->oscc_flags & OSCC_FLAG_RDONLY)
 403                 GOTO(out_wake, rc = -EROFS);
 404
 405         /* should be try wait until recovery finished */
 406         if((oscc->oscc_flags & OSCC_FLAG_RECOVERING) ||
 407            (oscc->oscc_flags & OSCC_FLAG_DEGRADED))
 408                 RETURN(-EAGAIN);
 409
 410         if (oscc_has_objects_nolock(oscc, 1)) {
 411                 memcpy(oa, &oscc->oscc_oa, sizeof(*oa));
 412                 oa->o_id = oscc->oscc_next_id;
 413                 lsm->lsm_object_id = oscc->oscc_next_id;
 414                 oscc->oscc_next_id++;
 415
 416                 CDEBUG(D_RPCTRACE, " set oscc_next_id = "LPU64"\n",
 417                        oscc->oscc_next_id);
 418                 GOTO(out_wake, rc = 0);
 419         }
 420
 421         /* we don't have objects now - continue wait */
 422         RETURN(-EAGAIN);
 423
 424 out_wake:
 425
 426         rc = oinfo->oi_cb_up(oinfo, rc);
 427         ptlrpc_fakereq_finished(req);
 428
 429         RETURN(rc);
 430 }
 431
 432 static int async_create_interpret(struct ptlrpc_request *req, void *data, int rc)
 433 {
 434         struct osc_create_async_args *args = ptlrpc_req_async_args(req);
 435         struct osc_creator    *oscc = args->rq_oscc;
 436         int ret;
 437
 438         spin_lock(&oscc->oscc_lock);
 439         ret = handle_async_create(req, rc);
 440         spin_unlock(&oscc->oscc_lock);
 441
 442         return ret;
 443 }
 444
 445 int osc_create_async(struct obd_export *exp, struct obd_info *oinfo,
 446                      struct lov_stripe_md **ea, struct obd_trans_info *oti)
 447 {
 448         int rc;
 449         struct ptlrpc_request *fake_req;
 450         struct osc_create_async_args *args;
 451         struct osc_creator *oscc = &exp->exp_obd->u.cli.cl_oscc;
 452         struct obdo *oa = oinfo->oi_oa;
 453         ENTRY;
 454
 455         if ((oa->o_valid & OBD_MD_FLGROUP) && (oa->o_gr != 0)){
 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         if ((oa->o_valid & OBD_MD_FLFLAGS) &&
 462             oa->o_flags == OBD_FL_RECREATE_OBJS) {
 463                 rc = osc_real_create(exp, oinfo->oi_oa, ea, oti);
 464                 rc = oinfo->oi_cb_up(oinfo, rc);
 465                 RETURN(rc);
 466         }
 467
 468         LASSERT((*ea) != NULL);
 469
 470         fake_req = ptlrpc_prep_fakereq(oscc->oscc_obd->u.cli.cl_import,
 471                                        osc_create_timeout,
 472                                        async_create_interpret);
 473         if (fake_req == NULL) {
 474                 rc = oinfo->oi_cb_up(oinfo, -ENOMEM);
 475                 RETURN(-ENOMEM);
 476         }
 477
 478         args = ptlrpc_req_async_args(fake_req);
 479         CLASSERT(sizeof(*args) <= sizeof(fake_req->rq_async_args));
 480
 481         args->rq_oscc  = oscc;
 482         args->rq_lsm   = *ea;
 483         args->rq_oinfo = oinfo;
 484
 485         spin_lock(&oscc->oscc_lock);
 486         /* try fast path */
 487         rc = handle_async_create(fake_req, 0);
 488         if (rc == -EAGAIN) {
 489                 int is_add;
 490                 /* we not have objects - try wait */
 491                 is_add = ptlrpcd_add_req(fake_req);
 492                 if (!is_add)
 493                         list_add(&fake_req->rq_list,
 494                                  &oscc->oscc_wait_create_list);
 495                 else
 496                         rc = is_add;
 497         }
 498         spin_unlock(&oscc->oscc_lock);
 499
 500         if (rc != -EAGAIN)
 501                 /* need free request if was error hit or
 502                  * objects already allocated */
 503                 ptlrpc_req_finished(fake_req);
 504         else
 505                 /* EAGAIN mean - request is delayed */
 506                 rc = 0;
 507
 508         RETURN(rc);
 509 }
 510
 511
 512 int osc_create(struct obd_export *exp, struct obdo *oa,
 513                struct lov_stripe_md **ea, struct obd_trans_info *oti)
 514 {
 515         struct lov_stripe_md *lsm;
 516         struct osc_creator *oscc = &exp->exp_obd->u.cli.cl_oscc;
 517         int del_orphan = 0, rc = 0;
 518
 519         ENTRY;
 520         LASSERT(oa);
 521         LASSERT(ea);
 522
 523         if ((oa->o_valid & OBD_MD_FLGROUP) && (oa->o_gr != 0))
 524                 RETURN(osc_real_create(exp, oa, ea, oti));
 525
 526         if ((oa->o_valid & OBD_MD_FLFLAGS) &&
 527             oa->o_flags == OBD_FL_RECREATE_OBJS) {
 528                 RETURN(osc_real_create(exp, oa, ea, oti));
 529         }
 530
 531         /* this is the special case where create removes orphans */
 532         if (oa->o_valid & OBD_MD_FLFLAGS &&
 533             oa->o_flags == OBD_FL_DELORPHAN) {
 534                 spin_lock(&oscc->oscc_lock);
 535                 if (oscc->oscc_flags & OSCC_FLAG_SYNC_IN_PROGRESS) {
 536                         spin_unlock(&oscc->oscc_lock);
 537                         RETURN(-EBUSY);
 538                 }
 539                 if (!(oscc->oscc_flags & OSCC_FLAG_RECOVERING)) {
 540                         spin_unlock(&oscc->oscc_lock);
 541                         RETURN(0);
 542                 }
 543
 544                 oscc->oscc_flags |= OSCC_FLAG_SYNC_IN_PROGRESS;
 545                 /* seting flag LOW we prevent extra grow precreate size
 546                  * and enforce use last assigned size */
 547                 oscc->oscc_flags |= OSCC_FLAG_LOW;
 548                 spin_unlock(&oscc->oscc_lock);
 549                 CDEBUG(D_HA, "%s: oscc recovery started - delete to "LPU64"\n",
 550                        oscc->oscc_obd->obd_name, oscc->oscc_next_id - 1);
 551
 552                 del_orphan = 1;
 553
 554                 /* delete from next_id on up */
 555                 oa->o_valid |= OBD_MD_FLID | OBD_MD_FLGROUP;
 556                 oa->o_id = oscc->oscc_next_id - 1;
 557                 oa->o_gr = 0;
 558
 559                 rc = osc_real_create(exp, oa, ea, NULL);
 560
 561                 spin_lock(&oscc->oscc_lock);
 562                 oscc->oscc_flags &= ~OSCC_FLAG_SYNC_IN_PROGRESS;
 563                 if (rc == 0 || rc == -ENOSPC) {
 564                         struct obd_connect_data *ocd;
 565                         struct obd_import *imp = oscc->oscc_obd->u.cli.cl_import;
 566
 567                         if (rc == -ENOSPC)
 568                                 oscc->oscc_flags |= OSCC_FLAG_NOSPC;
 569                         oscc->oscc_flags &= ~OSCC_FLAG_RECOVERING;
 570                         oscc->oscc_last_id = oa->o_id;
 571
 572                         ocd = &imp->imp_connect_data;
 573                         if (ocd->ocd_connect_flags & OBD_CONNECT_SKIP_ORPHAN) {
 574                                 /*
 575                                  * The OST reports back in oa->o_id from where
 576                                  * we should restart in order to skip orphan
 577                                  * objects
 578                                  */
 579                                 CDEBUG(D_HA, "%s: Skip orphan set, reset last "
 580                                        "objid\n", oscc->oscc_obd->obd_name);
 581                                 oscc->oscc_next_id = oa->o_id + 1;
 582                         }
 583
 584                         CDEBUG(D_HA, "%s: oscc recovery finished, last_id: "
 585                                LPU64", rc: %d\n", oscc->oscc_obd->obd_name,
 586                                oscc->oscc_last_id, rc);
 587                 } else {
 588                         CDEBUG(D_ERROR, "%s: oscc recovery failed: %d\n",
 589                                oscc->oscc_obd->obd_name, rc);
 590                 }
 591
 592                 cfs_waitq_signal(&oscc->oscc_waitq);
 593                 spin_unlock(&oscc->oscc_lock);
 594
 595                 RETURN(rc);
 596         }
 597
 598         lsm = *ea;
 599         if (lsm == NULL) {
 600                 rc = obd_alloc_memmd(exp, &lsm);
 601                 if (rc < 0)
 602                         RETURN(rc);
 603         }
 604
 605         while (1) {
 606                 if (oscc_in_sync(oscc))
 607                         CDEBUG(D_HA,"%s: oscc recovery in progress, waiting\n",
 608                                oscc->oscc_obd->obd_name);
 609
 610                 rc = oscc_precreate(oscc);
 611                 if (rc)
 612                         CDEBUG(D_HA,"%s: error create %d\n",
 613                                oscc->oscc_obd->obd_name, rc);
 614
 615                 spin_lock(&oscc->oscc_lock);
 616
 617                 /* wakeup but recovery did not finished */
 618                 if ((oscc->oscc_obd->u.cli.cl_import->imp_invalid) ||
 619                     (oscc->oscc_flags & OSCC_FLAG_RECOVERING)) {
 620                         rc = -EIO;
 621                         spin_unlock(&oscc->oscc_lock);
 622                         break;
 623                 }
 624
 625                 if (oscc->oscc_flags & OSCC_FLAG_NOSPC) {
 626                         rc = -ENOSPC;
 627                         spin_unlock(&oscc->oscc_lock);
 628                         break;
 629                 }
 630
 631                 if (oscc->oscc_flags & OSCC_FLAG_RDONLY) {
 632                         rc = -EROFS;
 633                         spin_unlock(&oscc->oscc_lock);
 634                         break;
 635                 }
 636
 637                 // Should we report -EIO error ?
 638                 if (oscc->oscc_flags & OSCC_FLAG_EXITING) {
 639                         spin_unlock(&oscc->oscc_lock);
 640                         break;
 641                 }
 642
 643                 if (oscc_has_objects_nolock(oscc, 1)) {
 644                         memcpy(oa, &oscc->oscc_oa, sizeof(*oa));
 645                         oa->o_id = oscc->oscc_next_id;
 646                         lsm->lsm_object_id = oscc->oscc_next_id;
 647                         *ea = lsm;
 648                         oscc->oscc_next_id++;
 649                         spin_unlock(&oscc->oscc_lock);
 650
 651                         CDEBUG(D_RPCTRACE, "%s: set oscc_next_id = "LPU64"\n",
 652                                exp->exp_obd->obd_name, oscc->oscc_next_id);
 653                         break;
 654                 }
 655
 656                 spin_unlock(&oscc->oscc_lock);
 657         }
 658
 659         if (rc == 0) {
 660                 CDEBUG(D_INFO, "%s: returning objid "LPU64"\n",
 661                        obd2cli_tgt(oscc->oscc_obd), lsm->lsm_object_id);
 662         } else {
 663                 if (*ea == NULL)
 664                         obd_free_memmd(exp, &lsm);
 665                 if (del_orphan != 0 && rc != -EIO)
 666                         /* Ignore non-IO precreate error for clear orphan */
 667                         rc = 0;
 668         }
 669         RETURN(rc);
 670 }
 671
 672 void oscc_init(struct obd_device *obd)
 673 {
 674         struct osc_creator *oscc;
 675
 676         if (obd == NULL)
 677                 return;
 678
 679         oscc = &obd->u.cli.cl_oscc;
 680
 681         memset(oscc, 0, sizeof(*oscc));
 682
 683         cfs_waitq_init(&oscc->oscc_waitq);
 684         spin_lock_init(&oscc->oscc_lock);
 685         oscc->oscc_obd = obd;
 686         oscc->oscc_grow_count = OST_MIN_PRECREATE;
 687         oscc->oscc_max_grow_count = OST_MAX_PRECREATE;
 688
 689         oscc->oscc_next_id = 2;
 690         oscc->oscc_last_id = 1;
 691         oscc->oscc_flags |= OSCC_FLAG_RECOVERING;
 692
 693         CFS_INIT_LIST_HEAD(&oscc->oscc_wait_create_list);
 694
 695         /* XXX the export handle should give the oscc the last object */
 696         /* oed->oed_oscc.oscc_last_id = exph->....; */
 697 }
 698
 699 void oscc_fini(struct obd_device *obd)
 700 {
 701         struct osc_creator *oscc = &obd->u.cli.cl_oscc;
 702         ENTRY;
 703
 704
 705         spin_lock(&oscc->oscc_lock);
 706         oscc->oscc_flags &= ~OSCC_FLAG_RECOVERING;
 707         oscc->oscc_flags |= OSCC_FLAG_EXITING;
 708         spin_unlock(&oscc->oscc_lock);
 709 }