lustre/osc/osc_create.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) 2003, 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  * 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         int                      rq_grow_count;
  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(const struct lu_env *env,
  78                                 struct ptlrpc_request *req, void *data, int rc)
  79 {
  80         struct osc_create_async_args *args = ptlrpc_req_async_args(req);
  81         struct osc_creator *oscc = args->rq_oscc;
  82         struct ost_body *body = NULL;
  83         struct ptlrpc_request *fake_req, *pos;
  84         ENTRY;
  85
  86         if (req->rq_repmsg) {
  87                 body = req_capsule_server_get(&req->rq_pill, &RMF_OST_BODY);
  88                 if (body == NULL && rc == 0)
  89                         rc = -EPROTO;
  90         }
  91
  92         LASSERT(oscc && (oscc->oscc_obd != LP_POISON));
  93
  94         cfs_spin_lock(&oscc->oscc_lock);
  95         oscc->oscc_flags &= ~OSCC_FLAG_CREATING;
  96         switch (rc) {
  97         case 0: {
  98                 if (body) {
  99                         int diff =ostid_id(&body->oa.o_oi)- oscc->oscc_last_id;
 100
 101                         /* oscc_internal_create() stores the original value of
 102                          * grow_count in osc_create_async_args::rq_grow_count.
 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 < args->rq_grow_count) {
 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 = ostid_id(&body->oa.o_oi);
 122                 }
 123                 cfs_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                                 if ((body->oa.o_valid & OBD_MD_FLFLAGS) &&
 137                                     (body->oa.o_flags & OBD_FL_NOSPC_BLK))
 138                                         oscc->oscc_flags |= OSCC_FLAG_NOSPC_BLK;
 139                                 else
 140                                         rc = 0;
 141                         }
 142                 }
 143                 cfs_spin_unlock(&oscc->oscc_lock);
 144                 DEBUG_REQ(D_INODE, req, "OST out of space, flagging");
 145                 break;
 146         case -EIO: {
 147                 /* filter always set body->oa.o_id as the last_id
 148                  * of filter (see filter_handle_precreate for detail)*/
 149                 if (body && body->oa.o_id > oscc->oscc_last_id)
 150                         oscc->oscc_last_id = body->oa.o_id;
 151                 cfs_spin_unlock(&oscc->oscc_lock);
 152                 break;
 153         }
 154         case -EINTR:
 155         case -EWOULDBLOCK: {
 156                 /* aka EAGAIN we should not delay create if import failed -
 157                  * this avoid client stick in create and avoid race with
 158                  * delorphan */
 159                 /* EINTR say - old create request is killed due mds<>ost
 160                  * eviction - OSCC_FLAG_RECOVERING can already set due
 161                  * IMP_DISCONN event */
 162                 oscc->oscc_flags |= OSCC_FLAG_RECOVERING;
 163                 /* oscc->oscc_grow_count = OST_MIN_PRECREATE; */
 164                 cfs_spin_unlock(&oscc->oscc_lock);
 165                 break;
 166         }
 167         default: {
 168                 oscc->oscc_flags |= OSCC_FLAG_RECOVERING;
 169                 oscc->oscc_grow_count = OST_MIN_PRECREATE;
 170                 cfs_spin_unlock(&oscc->oscc_lock);
 171                 DEBUG_REQ(D_ERROR, req,
 172                           "Unknown rc %d from async create: failing oscc", rc);
 173                 ptlrpc_fail_import(req->rq_import,
 174                                    lustre_msg_get_conn_cnt(req->rq_reqmsg));
 175         }
 176         }
 177
 178         CDEBUG(D_HA, "preallocated through id "LPU64" (next to use "LPU64")\n",
 179                oscc->oscc_last_id, oscc->oscc_next_id);
 180
 181         cfs_spin_lock(&oscc->oscc_lock);
 182         cfs_list_for_each_entry_safe(fake_req, pos,
 183                                      &oscc->oscc_wait_create_list, rq_list) {
 184                 if (handle_async_create(fake_req, rc) == -EAGAIN) {
 185                         oscc_internal_create(oscc);
 186                         /* sending request should be never fail because
 187                          * osc use preallocated requests pool */
 188                         GOTO(exit_wakeup, rc);
 189                 }
 190         }
 191         cfs_spin_unlock(&oscc->oscc_lock);
 192
 193 exit_wakeup:
 194         cfs_waitq_signal(&oscc->oscc_waitq);
 195         RETURN(rc);
 196 }
 197
 198 static int oscc_internal_create(struct osc_creator *oscc)
 199 {
 200         struct osc_create_async_args *args;
 201         struct ptlrpc_request *request;
 202         struct ost_body *body;
 203         ENTRY;
 204
 205         LASSERT_SPIN_LOCKED(&oscc->oscc_lock);
 206
 207         /* Do not check for a degraded OST here - bug21563/bug18539 */
 208         if (oscc->oscc_flags & OSCC_FLAG_RECOVERING) {
 209                 cfs_spin_unlock(&oscc->oscc_lock);
 210                 RETURN(0);
 211         }
 212
 213         /* we need check it before OSCC_FLAG_CREATING - because need
 214          * see lower number of precreate objects */
 215         if (oscc->oscc_grow_count < oscc->oscc_max_grow_count &&
 216             ((oscc->oscc_flags & OSCC_FLAG_LOW) == 0) &&
 217             (__s64)(oscc->oscc_last_id - oscc->oscc_next_id) <=
 218                    (oscc->oscc_grow_count / 4 + 1)) {
 219                 oscc->oscc_flags |= OSCC_FLAG_LOW;
 220                 oscc->oscc_grow_count *= 2;
 221         }
 222
 223         if (oscc->oscc_flags & OSCC_FLAG_CREATING) {
 224                 cfs_spin_unlock(&oscc->oscc_lock);
 225                 RETURN(0);
 226         }
 227
 228         if (oscc->oscc_grow_count > oscc->oscc_max_grow_count / 2)
 229                 oscc->oscc_grow_count = oscc->oscc_max_grow_count / 2;
 230
 231         oscc->oscc_flags |= OSCC_FLAG_CREATING;
 232         cfs_spin_unlock(&oscc->oscc_lock);
 233
 234         request = ptlrpc_request_alloc_pack(oscc->oscc_obd->u.cli.cl_import,
 235                                             &RQF_OST_CREATE,
 236                                             LUSTRE_OST_VERSION, OST_CREATE);
 237         if (request == NULL) {
 238                 cfs_spin_lock(&oscc->oscc_lock);
 239                 oscc->oscc_flags &= ~OSCC_FLAG_CREATING;
 240                 cfs_spin_unlock(&oscc->oscc_lock);
 241                 RETURN(-ENOMEM);
 242         }
 243
 244         request->rq_request_portal = OST_CREATE_PORTAL;
 245         ptlrpc_at_set_req_timeout(request);
 246         body = req_capsule_client_get(&request->rq_pill, &RMF_OST_BODY);
 247         args = ptlrpc_req_async_args(request);
 248         args->rq_oscc = oscc;
 249
 250         cfs_spin_lock(&oscc->oscc_lock);
 251         args->rq_grow_count = oscc->oscc_grow_count;
 252
 253         if (likely(fid_seq_is_mdt(oscc->oscc_oa.o_seq))) {
 254                 body->oa.o_oi.oi_seq = oscc->oscc_oa.o_seq;
 255                 body->oa.o_oi.oi_id  = oscc->oscc_last_id +
 256                                        oscc->oscc_grow_count;
 257         } else {
 258                 /*Just warning here currently, since not sure how fid-on-ost
 259                  *will be implemented here */
 260                 CWARN("o_seq: "LPU64" is not indicate any MDTs.\n",
 261                        oscc->oscc_oa.o_seq);
 262         }
 263         cfs_spin_unlock(&oscc->oscc_lock);
 264
 265         body->oa.o_valid |= OBD_MD_FLID | OBD_MD_FLGROUP;
 266         CDEBUG(D_RPCTRACE, "prealloc through id "LPU64" (last seen "LPU64")\n",
 267                body->oa.o_id, oscc->oscc_last_id);
 268
 269         /* we should not resend create request - anyway we will have delorphan
 270          * and kill these objects */
 271         request->rq_no_delay = request->rq_no_resend = 1;
 272         ptlrpc_request_set_replen(request);
 273
 274         request->rq_interpret_reply = osc_interpret_create;
 275         ptlrpcd_add_req(request, PDL_POLICY_ROUND, -1);
 276
 277         RETURN(0);
 278 }
 279
 280 static int oscc_has_objects_nolock(struct osc_creator *oscc, int count)
 281 {
 282         return ((__s64)(oscc->oscc_last_id - oscc->oscc_next_id) >= count);
 283 }
 284
 285 static int oscc_has_objects(struct osc_creator *oscc, int count)
 286 {
 287         int have_objs;
 288
 289         cfs_spin_lock(&oscc->oscc_lock);
 290         have_objs = oscc_has_objects_nolock(oscc, count);
 291         cfs_spin_unlock(&oscc->oscc_lock);
 292
 293         return have_objs;
 294 }
 295
 296 static int oscc_wait_for_objects(struct osc_creator *oscc, int count)
 297 {
 298         int have_objs;
 299         int ost_unusable;
 300
 301         ost_unusable = oscc->oscc_obd->u.cli.cl_import->imp_invalid;
 302
 303         cfs_spin_lock(&oscc->oscc_lock);
 304         ost_unusable |= (OSCC_FLAG_NOSPC | OSCC_FLAG_RDONLY |
 305                          OSCC_FLAG_EXITING) & oscc->oscc_flags;
 306         have_objs = oscc_has_objects_nolock(oscc, count);
 307
 308         if (!ost_unusable && !have_objs)
 309                 /* they release lock himself */
 310                 have_objs = oscc_internal_create(oscc);
 311         else
 312                 cfs_spin_unlock(&oscc->oscc_lock);
 313
 314         return have_objs || ost_unusable;
 315 }
 316
 317 static int oscc_precreate(struct osc_creator *oscc)
 318 {
 319         struct l_wait_info lwi;
 320         int rc = 0;
 321         ENTRY;
 322
 323         if (oscc_has_objects(oscc, oscc->oscc_grow_count / 2))
 324                 RETURN(0);
 325
 326         /* we should be not block forever - because client's create rpc can
 327          * stick in mds for long time and forbid client reconnect */
 328         lwi = LWI_TIMEOUT(cfs_timeout_cap(cfs_time_seconds(osc_create_timeout)),
 329                           NULL, NULL);
 330
 331         rc = l_wait_event(oscc->oscc_waitq, oscc_wait_for_objects(oscc, 1), &lwi);
 332         RETURN(rc);
 333 }
 334
 335 static int oscc_in_sync(struct osc_creator *oscc)
 336 {
 337         int sync;
 338
 339         cfs_spin_lock(&oscc->oscc_lock);
 340         sync = oscc->oscc_flags & OSCC_FLAG_SYNC_IN_PROGRESS;
 341         cfs_spin_unlock(&oscc->oscc_lock);
 342
 343         return sync;
 344 }
 345
 346 /* decide if the OST has remaining object, return value :
 347         0 : the OST has remaining objects, may or may not send precreation RPC.
 348         1 : the OST has no remaining object, and the sent precreation RPC
 349             has not been completed yet.
 350         2 : the OST has no remaining object, and will not get any for
 351             a potentially very long time
 352      1000 : unusable
 353  */
 354 int osc_precreate(struct obd_export *exp)
 355 {
 356         struct osc_creator *oscc = &exp->exp_obd->u.cli.cl_oscc;
 357         struct obd_import *imp = exp->exp_imp_reverse;
 358         int rc;
 359         ENTRY;
 360
 361         LASSERT(oscc != NULL);
 362         if (imp != NULL && imp->imp_deactive)
 363                 GOTO(out_nolock, rc = 1000);
 364
 365         /* Handle critical states first */
 366         cfs_spin_lock(&oscc->oscc_lock);
 367         if (oscc->oscc_flags & OSCC_FLAG_NOSPC_BLK ||
 368             oscc->oscc_flags & OSCC_FLAG_RDONLY ||
 369             oscc->oscc_flags & OSCC_FLAG_EXITING)
 370                 GOTO(out, rc = 1000);
 371
 372         if ((oscc->oscc_flags & OSCC_FLAG_RECOVERING) ||
 373             (oscc->oscc_flags & OSCC_FLAG_DEGRADED))
 374                 GOTO(out, rc = 2);
 375
 376         if (oscc_has_objects_nolock(oscc, oscc->oscc_grow_count / 2))
 377                 GOTO(out, rc = 0);
 378
 379         /* Return 0, if we have at least one object - bug 22884 */
 380         rc = oscc_has_objects_nolock(oscc, 1) ? 0 : 1;
 381
 382         if (oscc->oscc_flags & OSCC_FLAG_NOSPC)
 383                 GOTO(out, (rc == 0) ? 0 : 1000);
 384
 385         /* Do not check for OSCC_FLAG_CREATING flag here, let
 386          * osc_precreate() call oscc_internal_create() and
 387          * adjust oscc_grow_count bug21563 */
 388         if (oscc->oscc_flags & OSCC_FLAG_SYNC_IN_PROGRESS)
 389                 GOTO(out, rc);
 390
 391         if (oscc_internal_create(oscc))
 392                 GOTO(out_nolock, rc = 1000);
 393
 394         RETURN(rc);
 395 out:
 396         cfs_spin_unlock(&oscc->oscc_lock);
 397 out_nolock:
 398         return rc;
 399 }
 400
 401 static int handle_async_create(struct ptlrpc_request *req, int rc)
 402 {
 403         struct osc_create_async_args *args = ptlrpc_req_async_args(req);
 404         struct osc_creator    *oscc = args->rq_oscc;
 405         struct lov_stripe_md  *lsm  = args->rq_lsm;
 406         struct obd_info       *oinfo = args->rq_oinfo;
 407         struct obdo           *oa = oinfo->oi_oa;
 408
 409         LASSERT_SPIN_LOCKED(&oscc->oscc_lock);
 410
 411         if(rc)
 412                 GOTO(out_wake, rc);
 413
 414         /* Handle the critical type errors first.
 415          * Should we also test cl_import state as well ? */
 416         if (oscc->oscc_flags & OSCC_FLAG_EXITING)
 417                 GOTO(out_wake, rc = -EIO);
 418
 419         if (oscc->oscc_flags & OSCC_FLAG_NOSPC_BLK)
 420                 GOTO(out_wake, rc = -ENOSPC);
 421
 422         if (oscc->oscc_flags & OSCC_FLAG_RDONLY)
 423                 GOTO(out_wake, rc = -EROFS);
 424
 425         /* should be try wait until recovery finished */
 426         if((oscc->oscc_flags & OSCC_FLAG_RECOVERING) ||
 427            (oscc->oscc_flags & OSCC_FLAG_DEGRADED))
 428                 RETURN(-EAGAIN);
 429
 430         if (oscc_has_objects_nolock(oscc, 1)) {
 431                 memcpy(oa, &oscc->oscc_oa, sizeof(*oa));
 432                 oa->o_id = oscc->oscc_next_id;
 433                 lsm->lsm_object_id = oscc->oscc_next_id;
 434                 oscc->oscc_next_id++;
 435
 436                 CDEBUG(D_RPCTRACE, " set oscc_next_id = "LPU64"\n",
 437                        oscc->oscc_next_id);
 438                 GOTO(out_wake, rc = 0);
 439         }
 440
 441         /* we don't have objects now - continue wait */
 442         RETURN(-EAGAIN);
 443
 444 out_wake:
 445
 446         rc = oinfo->oi_cb_up(oinfo, rc);
 447         ptlrpc_fakereq_finished(req);
 448
 449         RETURN(rc);
 450 }
 451
 452 static int async_create_interpret(const struct lu_env *env,
 453                                   struct ptlrpc_request *req, void *data,
 454                                   int rc)
 455 {
 456         struct osc_create_async_args *args = ptlrpc_req_async_args(req);
 457         struct osc_creator    *oscc = args->rq_oscc;
 458         int ret;
 459
 460         cfs_spin_lock(&oscc->oscc_lock);
 461         ret = handle_async_create(req, rc);
 462         cfs_spin_unlock(&oscc->oscc_lock);
 463
 464         return ret;
 465 }
 466
 467 int osc_create_async(struct obd_export *exp, struct obd_info *oinfo,
 468                      struct lov_stripe_md **ea, struct obd_trans_info *oti)
 469 {
 470         int rc;
 471         struct ptlrpc_request *fake_req;
 472         struct osc_create_async_args *args;
 473         struct osc_creator *oscc = &exp->exp_obd->u.cli.cl_oscc;
 474         struct obdo *oa = oinfo->oi_oa;
 475         ENTRY;
 476
 477         if ((oa->o_valid & OBD_MD_FLGROUP) && !fid_seq_is_mdt(oa->o_seq)) {
 478                 rc = osc_real_create(exp, oinfo->oi_oa, ea, oti);
 479                 rc = oinfo->oi_cb_up(oinfo, rc);
 480                 RETURN(rc);
 481         }
 482
 483         if ((oa->o_valid & OBD_MD_FLFLAGS) &&
 484             oa->o_flags == OBD_FL_RECREATE_OBJS) {
 485                 rc = osc_real_create(exp, oinfo->oi_oa, ea, oti);
 486                 rc = oinfo->oi_cb_up(oinfo, rc);
 487                 RETURN(rc);
 488         }
 489
 490         LASSERT((*ea) != NULL);
 491
 492         fake_req = ptlrpc_prep_fakereq(oscc->oscc_obd->u.cli.cl_import,
 493                                        osc_create_timeout,
 494                                        async_create_interpret);
 495         if (fake_req == NULL) {
 496                 rc = oinfo->oi_cb_up(oinfo, -ENOMEM);
 497                 RETURN(-ENOMEM);
 498         }
 499
 500         args = ptlrpc_req_async_args(fake_req);
 501         CLASSERT(sizeof(*args) <= sizeof(fake_req->rq_async_args));
 502
 503         args->rq_oscc  = oscc;
 504         args->rq_lsm   = *ea;
 505         args->rq_oinfo = oinfo;
 506
 507         cfs_spin_lock(&oscc->oscc_lock);
 508         /* try fast path */
 509         rc = handle_async_create(fake_req, 0);
 510         if (rc == -EAGAIN) {
 511                 /* We don't have any objects, wait until we get a reply. */
 512                 ptlrpcd_add_req(fake_req, PDL_POLICY_ROUND, -1);
 513                 cfs_list_add(&fake_req->rq_list,
 514                              &oscc->oscc_wait_create_list);
 515                 cfs_spin_unlock(&oscc->oscc_lock);
 516                 /* EAGAIN mean - request is delayed */
 517                 rc = 0;
 518         } else {
 519                 cfs_spin_unlock(&oscc->oscc_lock);
 520                 /* need free request if was error hit or
 521                  * objects already allocated */
 522                 ptlrpc_req_finished(fake_req);
 523         }
 524
 525         RETURN(rc);
 526 }
 527
 528 int osc_create(struct obd_export *exp, struct obdo *oa,
 529                struct lov_stripe_md **ea, struct obd_trans_info *oti)
 530 {
 531         struct osc_creator *oscc = &exp->exp_obd->u.cli.cl_oscc;
 532         struct obd_import  *imp  = exp->exp_obd->u.cli.cl_import;
 533         struct lov_stripe_md *lsm;
 534         int del_orphan = 0, rc = 0;
 535         ENTRY;
 536
 537         LASSERT(oa);
 538         LASSERT(ea);
 539         LASSERT(oa->o_valid & OBD_MD_FLGROUP);
 540
 541         if ((oa->o_valid & OBD_MD_FLFLAGS) &&
 542             oa->o_flags == OBD_FL_RECREATE_OBJS) {
 543                 RETURN(osc_real_create(exp, oa, ea, oti));
 544         }
 545
 546         if (!fid_seq_is_mdt(oa->o_seq))
 547                 RETURN(osc_real_create(exp, oa, ea, oti));
 548
 549         /* this is the special case where create removes orphans */
 550         if (oa->o_valid & OBD_MD_FLFLAGS &&
 551             oa->o_flags == OBD_FL_DELORPHAN) {
 552                 cfs_spin_lock(&oscc->oscc_lock);
 553                 if (oscc->oscc_flags & OSCC_FLAG_SYNC_IN_PROGRESS) {
 554                         cfs_spin_unlock(&oscc->oscc_lock);
 555                         RETURN(-EBUSY);
 556                 }
 557                 if (!(oscc->oscc_flags & OSCC_FLAG_RECOVERING)) {
 558                         cfs_spin_unlock(&oscc->oscc_lock);
 559                         RETURN(0);
 560                 }
 561
 562                 oscc->oscc_flags |= OSCC_FLAG_SYNC_IN_PROGRESS;
 563                 /* seting flag LOW we prevent extra grow precreate size
 564                  * and enforce use last assigned size */
 565                 oscc->oscc_flags |= OSCC_FLAG_LOW;
 566                 cfs_spin_unlock(&oscc->oscc_lock);
 567                 CDEBUG(D_HA, "%s: oscc recovery started - delete to "LPU64"\n",
 568                        oscc->oscc_obd->obd_name, oscc->oscc_next_id - 1);
 569
 570                 del_orphan = 1;
 571
 572                 /* delete from next_id on up */
 573                 oa->o_valid |= OBD_MD_FLID;
 574                 oa->o_id = oscc->oscc_next_id - 1;
 575
 576                 rc = osc_real_create(exp, oa, ea, NULL);
 577
 578                 cfs_spin_lock(&oscc->oscc_lock);
 579                 oscc->oscc_flags &= ~OSCC_FLAG_SYNC_IN_PROGRESS;
 580                 if (rc == 0 || rc == -ENOSPC) {
 581                         struct obd_connect_data *ocd;
 582
 583                         if (rc == -ENOSPC) {
 584                                 oscc->oscc_flags |= OSCC_FLAG_NOSPC;
 585                                 if ((oa->o_valid & OBD_MD_FLFLAGS) &&
 586                                     (oa->o_flags & OBD_FL_NOSPC_BLK))
 587                                         oscc->oscc_flags |= OSCC_FLAG_NOSPC_BLK;
 588                         }
 589                         oscc->oscc_flags &= ~OSCC_FLAG_RECOVERING;
 590
 591                         oscc->oscc_last_id = oa->o_id;
 592                         ocd = &imp->imp_connect_data;
 593                         if (ocd->ocd_connect_flags & OBD_CONNECT_SKIP_ORPHAN) {
 594                                 /*
 595                                  * The OST reports back in oa->o_id from where
 596                                  * we should restart in order to skip orphan
 597                                  * objects
 598                                  */
 599                                 CDEBUG(D_HA, "%s: Skip orphan set, reset last "
 600                                        "objid\n", oscc->oscc_obd->obd_name);
 601                                 oscc->oscc_next_id = oa->o_id + 1;
 602                         }
 603
 604                         /* sanity check for next objid. see bug 17025 */
 605                         LASSERT(oscc->oscc_next_id == oa->o_id + 1);
 606
 607                         CDEBUG(D_HA, "%s: oscc recovery finished, last_id: "
 608                                LPU64", rc: %d\n", oscc->oscc_obd->obd_name,
 609                                oscc->oscc_last_id, rc);
 610                 } else {
 611                         CDEBUG(D_ERROR, "%s: oscc recovery failed: %d\n",
 612                                oscc->oscc_obd->obd_name, rc);
 613                 }
 614
 615                 cfs_waitq_signal(&oscc->oscc_waitq);
 616                 cfs_spin_unlock(&oscc->oscc_lock);
 617
 618                 if (rc < 0)
 619                         RETURN(rc);
 620         }
 621
 622         lsm = *ea;
 623         if (lsm == NULL) {
 624                 rc = obd_alloc_memmd(exp, &lsm);
 625                 if (rc < 0)
 626                         RETURN(rc);
 627         }
 628
 629         while (1) {
 630                 if (oscc_in_sync(oscc))
 631                         CDEBUG(D_HA,"%s: oscc recovery in progress, waiting\n",
 632                                oscc->oscc_obd->obd_name);
 633
 634                 rc = oscc_precreate(oscc);
 635                 if (rc)
 636                         CDEBUG(D_HA,"%s: error create %d\n",
 637                                oscc->oscc_obd->obd_name, rc);
 638
 639                 cfs_spin_lock(&oscc->oscc_lock);
 640
 641                 /* wakeup but recovery did not finished */
 642                 if ((oscc->oscc_obd->u.cli.cl_import->imp_invalid) ||
 643                     (oscc->oscc_flags & OSCC_FLAG_RECOVERING)) {
 644                         rc = -EIO;
 645                         cfs_spin_unlock(&oscc->oscc_lock);
 646                         break;
 647                 }
 648
 649                 if (oscc->oscc_flags & OSCC_FLAG_NOSPC_BLK) {
 650                         rc = -ENOSPC;
 651                         cfs_spin_unlock(&oscc->oscc_lock);
 652                         break;
 653                 }
 654
 655                 if (oscc->oscc_flags & OSCC_FLAG_RDONLY) {
 656                         rc = -EROFS;
 657                         cfs_spin_unlock(&oscc->oscc_lock);
 658                         break;
 659                 }
 660
 661                 // Should we report -EIO error ?
 662                 if (oscc->oscc_flags & OSCC_FLAG_EXITING) {
 663                         cfs_spin_unlock(&oscc->oscc_lock);
 664                         break;
 665                 }
 666
 667                 /**
 668                  * If this is DELORPHAN process, no need create object here,
 669                  * otherwise this will create a gap of object id, and MDS
 670                  * might create some orphan log (mds_lov_update_objids), then
 671                  * remove objects wrongly on OST. Bug 21379.
 672                  */
 673                 if (oa->o_valid & OBD_MD_FLFLAGS &&
 674                         oa->o_flags == OBD_FL_DELORPHAN) {
 675                         cfs_spin_unlock(&oscc->oscc_lock);
 676                         break;
 677                 }
 678
 679                 if (oscc_has_objects_nolock(oscc, 1)) {
 680                         memcpy(oa, &oscc->oscc_oa, sizeof(*oa));
 681                         oa->o_id = oscc->oscc_next_id;
 682                         lsm->lsm_object_id = oscc->oscc_next_id;
 683                         *ea = lsm;
 684                         oscc->oscc_next_id++;
 685                         cfs_spin_unlock(&oscc->oscc_lock);
 686
 687                         CDEBUG(D_RPCTRACE, "%s: set oscc_next_id = "LPU64"\n",
 688                                exp->exp_obd->obd_name, oscc->oscc_next_id);
 689                         break;
 690                 }
 691
 692                 if (oscc->oscc_flags & OSCC_FLAG_NOSPC) {
 693                         rc = -ENOSPC;
 694                         cfs_spin_unlock(&oscc->oscc_lock);
 695                         break;
 696                 }
 697
 698                 cfs_spin_unlock(&oscc->oscc_lock);
 699         }
 700
 701         if (rc == 0) {
 702                 CDEBUG(D_INFO, "%s: returning objid "LPU64"\n",
 703                        obd2cli_tgt(oscc->oscc_obd), lsm->lsm_object_id);
 704         } else {
 705                 if (*ea == NULL)
 706                         obd_free_memmd(exp, &lsm);
 707                 if (del_orphan != 0 && rc != -EIO)
 708                         /* Ignore non-IO precreate error for clear orphan */
 709                         rc = 0;
 710         }
 711         RETURN(rc);
 712 }
 713
 714 void oscc_init(struct obd_device *obd)
 715 {
 716         struct osc_creator *oscc;
 717
 718         if (obd == NULL)
 719                 return;
 720
 721         oscc = &obd->u.cli.cl_oscc;
 722
 723         memset(oscc, 0, sizeof(*oscc));
 724
 725         cfs_waitq_init(&oscc->oscc_waitq);
 726         cfs_spin_lock_init(&oscc->oscc_lock);
 727         oscc->oscc_obd = obd;
 728         oscc->oscc_grow_count = OST_MIN_PRECREATE;
 729         oscc->oscc_max_grow_count = OST_MAX_PRECREATE;
 730
 731         oscc->oscc_next_id = 2;
 732         oscc->oscc_last_id = 1;
 733         oscc->oscc_flags |= OSCC_FLAG_RECOVERING;
 734
 735         CFS_INIT_LIST_HEAD(&oscc->oscc_wait_create_list);
 736
 737         /* XXX the export handle should give the oscc the last object */
 738         /* oed->oed_oscc.oscc_last_id = exph->....; */
 739 }
 740
 741 void oscc_fini(struct obd_device *obd)
 742 {
 743         struct osc_creator *oscc = &obd->u.cli.cl_oscc;
 744         ENTRY;
 745
 746
 747         cfs_spin_lock(&oscc->oscc_lock);
 748         oscc->oscc_flags &= ~OSCC_FLAG_RECOVERING;
 749         oscc->oscc_flags |= OSCC_FLAG_EXITING;
 750         cfs_spin_unlock(&oscc->oscc_lock);
 751 }