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                 spin_unlock(&oscc->oscc_lock);
 199                 RETURN(0);
 200         }
 201
 202         /* we need check it before OSCC_FLAG_CREATING - because need
 203          * see lower number of precreate objects */
 204         if (oscc->oscc_grow_count < oscc->oscc_max_grow_count &&
 205             ((oscc->oscc_flags & OSCC_FLAG_LOW) == 0) &&
 206             (__s64)(oscc->oscc_last_id - oscc->oscc_next_id) <=
 207                    (oscc->oscc_grow_count / 4 + 1)) {
 208                 oscc->oscc_flags |= OSCC_FLAG_LOW;
 209                 oscc->oscc_grow_count *= 2;
 210         }
 211
 212         if (oscc->oscc_flags & OSCC_FLAG_CREATING) {
 213                 spin_unlock(&oscc->oscc_lock);
 214                 RETURN(0);
 215         }
 216
 217         if (oscc->oscc_grow_count > oscc->oscc_max_grow_count / 2)
 218                 oscc->oscc_grow_count = oscc->oscc_max_grow_count / 2;
 219
 220         oscc->oscc_flags |= OSCC_FLAG_CREATING;
 221         spin_unlock(&oscc->oscc_lock);
 222
 223         request = ptlrpc_prep_req(oscc->oscc_obd->u.cli.cl_import,
 224                                   LUSTRE_OST_VERSION, OST_CREATE, 2,
 225                                   size, NULL);
 226         if (request == NULL) {
 227                 spin_lock(&oscc->oscc_lock);
 228                 oscc->oscc_flags &= ~OSCC_FLAG_CREATING;
 229                 spin_unlock(&oscc->oscc_lock);
 230                 RETURN(-ENOMEM);
 231         }
 232
 233         request->rq_request_portal = OST_CREATE_PORTAL;
 234         ptlrpc_at_set_req_timeout(request);
 235         body = lustre_msg_buf(request->rq_reqmsg, REQ_REC_OFF, sizeof(*body));
 236
 237         spin_lock(&oscc->oscc_lock);
 238         body->oa.o_id = oscc->oscc_last_id + oscc->oscc_grow_count;
 239         body->oa.o_gr = oscc->oscc_oa.o_gr;
 240         LASSERT_MDS_GROUP(body->oa.o_gr);
 241         body->oa.o_valid |= OBD_MD_FLID | OBD_MD_FLGROUP;
 242         request->rq_async_args.space[0] = oscc->oscc_grow_count;
 243         spin_unlock(&oscc->oscc_lock);
 244         CDEBUG(D_RPCTRACE, "prealloc through id "LPU64" (last seen "LPU64")\n",
 245                body->oa.o_id, oscc->oscc_last_id);
 246
 247         /* we should not resend create request - anyway we will have delorphan
 248          * and kill these objects */
 249         request->rq_no_delay = request->rq_no_resend = 1;
 250         ptlrpc_req_set_repsize(request, 2, size);
 251
 252         request->rq_async_args.pointer_arg[0] = oscc;
 253         request->rq_interpret_reply = osc_interpret_create;
 254         ptlrpcd_add_req(request, PSCOPE_OTHER);
 255
 256         RETURN(0);
 257 }
 258
 259 static int oscc_has_objects_nolock(struct osc_creator *oscc, int count)
 260 {
 261         return ((__s64)(oscc->oscc_last_id - oscc->oscc_next_id) >= count);
 262 }
 263
 264
 265 static int oscc_has_objects(struct osc_creator *oscc, int count)
 266 {
 267         int have_objs;
 268
 269         spin_lock(&oscc->oscc_lock);
 270         have_objs = oscc_has_objects_nolock(oscc, count);
 271         spin_unlock(&oscc->oscc_lock);
 272
 273         return have_objs;
 274 }
 275
 276 static int oscc_wait_for_objects(struct osc_creator *oscc, int count)
 277 {
 278         int have_objs;
 279         int ost_unusable;
 280
 281         ost_unusable = oscc->oscc_obd->u.cli.cl_import->imp_invalid;
 282
 283         spin_lock(&oscc->oscc_lock);
 284         ost_unusable |= (OSCC_FLAG_NOSPC | OSCC_FLAG_RDONLY |
 285                          OSCC_FLAG_EXITING) & oscc->oscc_flags;
 286         have_objs = oscc_has_objects_nolock(oscc, count);
 287
 288         if (!ost_unusable)
 289                 /* they release lock himself */
 290                 oscc_internal_create(oscc);
 291         else
 292                 spin_unlock(&oscc->oscc_lock);
 293
 294         return have_objs || ost_unusable;
 295 }
 296
 297 static int oscc_precreate(struct osc_creator *oscc)
 298 {
 299         struct l_wait_info lwi;
 300         int rc = 0;
 301         ENTRY;
 302
 303         if (oscc_has_objects(oscc, oscc->oscc_grow_count / 2))
 304                 RETURN(0);
 305
 306         /* we should be not block forever - because client's create rpc can
 307          * stick in mds for long time and forbid client reconnect */
 308         lwi = LWI_TIMEOUT(cfs_timeout_cap(cfs_time_seconds(osc_create_timeout)),
 309                           NULL, NULL);
 310
 311         rc = l_wait_event(oscc->oscc_waitq, oscc_wait_for_objects(oscc, 1), &lwi);
 312
 313         if (!oscc_has_objects(oscc, 1) || (oscc->oscc_flags & OSCC_FLAG_NOSPC))
 314                 rc = -ENOSPC;
 315
 316         if (oscc->oscc_flags & OSCC_FLAG_RDONLY)
 317                 rc = -EROFS;
 318
 319         if (oscc->oscc_obd->u.cli.cl_import->imp_invalid)
 320                 rc = -EIO;
 321
 322         RETURN(rc);
 323 }
 324
 325 static int oscc_in_sync(struct osc_creator *oscc)
 326 {
 327         int sync;
 328
 329         spin_lock(&oscc->oscc_lock);
 330         sync = oscc->oscc_flags & OSCC_FLAG_SYNC_IN_PROGRESS;
 331         spin_unlock(&oscc->oscc_lock);
 332
 333         return sync;
 334 }
 335
 336 /* decide if the OST has remaining object, return value :
 337         0 : the OST has remaining object, and don't need to do precreate.
 338         1 : the OST has no remaining object, and will send a RPC for precreate.
 339         2 : the OST has no remaining object, and will not get any for
 340             a potentially very long time
 341      1000 : unusable
 342  */
 343 int osc_precreate(struct obd_export *exp)
 344 {
 345         struct osc_creator *oscc = &exp->exp_obd->u.cli.cl_oscc;
 346         struct obd_import *imp = exp->exp_imp_reverse;
 347         ENTRY;
 348
 349         LASSERT(oscc != NULL);
 350         if (imp != NULL && imp->imp_deactive)
 351                 RETURN(1000);
 352
 353         /* until oscc in recovery - other flags is wrong */
 354         spin_lock(&oscc->oscc_lock);
 355         if (oscc->oscc_flags & OSCC_FLAG_NOSPC ||
 356             oscc->oscc_flags & OSCC_FLAG_RDONLY) {
 357                 spin_unlock(&oscc->oscc_lock);
 358                 RETURN(1000);
 359         }
 360
 361         if (oscc->oscc_flags & OSCC_FLAG_RECOVERING ||
 362             oscc->oscc_flags & OSCC_FLAG_DEGRADED) {
 363                 spin_unlock(&oscc->oscc_lock);
 364                 RETURN(2);
 365         }
 366
 367         if (oscc_has_objects_nolock(oscc, oscc->oscc_grow_count / 2)) {
 368                 spin_unlock(&oscc->oscc_lock);
 369                 RETURN(0);
 370         }
 371
 372         if ((oscc->oscc_flags & OSCC_FLAG_SYNC_IN_PROGRESS) ||
 373             (oscc->oscc_flags & OSCC_FLAG_CREATING)) {
 374                 spin_unlock(&oscc->oscc_lock);
 375                 RETURN(1);
 376         }
 377
 378         oscc_internal_create(oscc);
 379         RETURN(1);
 380 }
 381
 382 static int handle_async_create(struct ptlrpc_request *req, int rc)
 383 {
 384         struct osc_create_async_args *args = ptlrpc_req_async_args(req);
 385         struct osc_creator    *oscc = args->rq_oscc;
 386         struct lov_stripe_md  *lsm  = args->rq_lsm;
 387         struct obd_info       *oinfo = args->rq_oinfo;
 388         struct obdo           *oa = oinfo->oi_oa;
 389
 390         LASSERT_SPIN_LOCKED(&oscc->oscc_lock);
 391
 392         if(rc)
 393                 GOTO(out_wake, rc);
 394
 395         if ((oscc->oscc_flags & OSCC_FLAG_EXITING))
 396                 GOTO(out_wake, rc = -EIO);
 397
 398         if (oscc_has_objects_nolock(oscc, 1)) {
 399                 memcpy(oa, &oscc->oscc_oa, sizeof(*oa));
 400                 oa->o_id = oscc->oscc_next_id;
 401                 lsm->lsm_object_id = oscc->oscc_next_id;
 402                 oscc->oscc_next_id++;
 403
 404                 CDEBUG(D_RPCTRACE, " set oscc_next_id = "LPU64"\n",
 405                        oscc->oscc_next_id);
 406                GOTO(out_wake, rc = 0);
 407         }
 408
 409         /* should be try wait until recovery finished */
 410         if(oscc->oscc_flags & OSCC_FLAG_RECOVERING)
 411                 RETURN(-EAGAIN);
 412
 413         if (oscc->oscc_flags & OSCC_FLAG_NOSPC)
 414                 GOTO(out_wake, rc = -ENOSPC);
 415
 416         if (oscc->oscc_flags & OSCC_FLAG_RDONLY)
 417                 GOTO(out_wake, rc = -EROFS);
 418
 419         /* we not have objects now - continue wait */
 420         RETURN(-EAGAIN);
 421
 422 out_wake:
 423
 424         rc = oinfo->oi_cb_up(oinfo, rc);
 425         ptlrpc_fakereq_finished(req);
 426
 427         RETURN(rc);
 428 }
 429
 430 static int async_create_interpret(const struct lu_env *env,
 431                                   struct ptlrpc_request *req, void *data, int rc)
 432 {
 433         struct osc_create_async_args *args = ptlrpc_req_async_args(req);
 434         struct osc_creator    *oscc = args->rq_oscc;
 435         int ret;
 436
 437         spin_lock(&oscc->oscc_lock);
 438         ret = handle_async_create(req, rc);
 439         spin_unlock(&oscc->oscc_lock);
 440
 441         return ret;
 442 }
 443
 444 int osc_create_async(struct obd_export *exp, struct obd_info *oinfo,
 445                      struct lov_stripe_md **ea, struct obd_trans_info *oti)
 446 {
 447         int rc;
 448         struct ptlrpc_request *fake_req;
 449         struct osc_create_async_args *args;
 450         struct osc_creator *oscc = &exp->exp_obd->u.cli.cl_oscc;
 451         struct obdo *oa = oinfo->oi_oa;
 452         ENTRY;
 453
 454         if ((oa->o_valid & OBD_MD_FLGROUP) && (oa->o_gr != 0)){
 455                 rc = osc_real_create(exp, oinfo->oi_oa, ea, oti);
 456                 rc = oinfo->oi_cb_up(oinfo, rc);
 457                 RETURN(rc);
 458         }
 459
 460         if ((oa->o_valid & OBD_MD_FLFLAGS) &&
 461             oa->o_flags == OBD_FL_RECREATE_OBJS) {
 462                 rc = osc_real_create(exp, oinfo->oi_oa, ea, oti);
 463                 rc = oinfo->oi_cb_up(oinfo, rc);
 464                 RETURN(rc);
 465         }
 466
 467         LASSERT((*ea) != NULL);
 468
 469         fake_req = ptlrpc_prep_fakereq(oscc->oscc_obd->u.cli.cl_import,
 470                                        osc_create_timeout,
 471                                        async_create_interpret);
 472         if (fake_req == NULL) {
 473                 rc = oinfo->oi_cb_up(oinfo, -ENOMEM);
 474                 RETURN(-ENOMEM);
 475         }
 476
 477         args = ptlrpc_req_async_args(fake_req);
 478         CLASSERT(sizeof(*args) <= sizeof(fake_req->rq_async_args));
 479
 480         args->rq_oscc  = oscc;
 481         args->rq_lsm   = *ea;
 482         args->rq_oinfo = oinfo;
 483
 484         spin_lock(&oscc->oscc_lock);
 485         /* try fast path */
 486         rc = handle_async_create(fake_req, 0);
 487         if (rc == -EAGAIN) {
 488                 int is_add;
 489                 /* we not have objects - try wait */
 490                 is_add = ptlrpcd_add_req(fake_req, PSCOPE_OTHER);
 491                 if (!is_add)
 492                         list_add(&fake_req->rq_list,
 493                                  &oscc->oscc_wait_create_list);
 494                 else
 495                         rc = is_add;
 496         }
 497         spin_unlock(&oscc->oscc_lock);
 498
 499         if (rc != -EAGAIN)
 500                 /* need free request if was error hit or
 501                  * objects already allocated */
 502                 ptlrpc_req_finished(fake_req);
 503         else
 504                 /* EAGAIN mean - request is delayed */
 505                 rc = 0;
 506
 507         RETURN(rc);
 508 }
 509
 510 int osc_create(struct obd_export *exp, struct obdo *oa,
 511                struct lov_stripe_md **ea, struct obd_trans_info *oti)
 512 {
 513         struct osc_creator *oscc = &exp->exp_obd->u.cli.cl_oscc;
 514         struct obd_import  *imp  = exp->exp_obd->u.cli.cl_import;
 515         struct lov_stripe_md *lsm;
 516         int rc = 0;
 517         ENTRY;
 518
 519         LASSERT(oa);
 520         LASSERT(ea);
 521         LASSERT_MDS_GROUP(oa->o_gr);
 522         LASSERT(oa->o_valid & OBD_MD_FLGROUP);
 523
 524         if ((oa->o_valid & OBD_MD_FLFLAGS) &&
 525             oa->o_flags == OBD_FL_RECREATE_OBJS) {
 526                 RETURN(osc_real_create(exp, oa, ea, oti));
 527         }
 528
 529         if (oa->o_gr == FILTER_GROUP_LLOG || oa->o_gr == FILTER_GROUP_ECHO)
 530                 RETURN(osc_real_create(exp, oa, ea, oti));
 531
 532         /* this is the special case where create removes orphans */
 533         if ((oa->o_valid & OBD_MD_FLFLAGS) &&
 534             oa->o_flags == OBD_FL_DELORPHAN) {
 535                 spin_lock(&oscc->oscc_lock);
 536                 if (oscc->oscc_flags & OSCC_FLAG_SYNC_IN_PROGRESS) {
 537                         spin_unlock(&oscc->oscc_lock);
 538                         RETURN(-EBUSY);
 539                 }
 540                 if (!(oscc->oscc_flags & OSCC_FLAG_RECOVERING)) {
 541                         spin_unlock(&oscc->oscc_lock);
 542                         RETURN(0);
 543                 }
 544
 545                 oscc->oscc_flags |= OSCC_FLAG_SYNC_IN_PROGRESS;
 546                 /* seting flag LOW we prevent extra grow precreate size
 547                  * and enforce use last assigned size */
 548                 oscc->oscc_flags |= OSCC_FLAG_LOW;
 549                 spin_unlock(&oscc->oscc_lock);
 550                 CDEBUG(D_HA, "%s: oscc recovery started - delete to "LPU64"\n",
 551                        oscc->oscc_obd->obd_name, oscc->oscc_next_id - 1);
 552
 553                 /* delete from next_id on up */
 554                 oa->o_valid |= OBD_MD_FLID;
 555                 oa->o_id = oscc->oscc_next_id - 1;
 556
 557                 rc = osc_real_create(exp, oa, ea, NULL);
 558
 559                 spin_lock(&oscc->oscc_lock);
 560                 oscc->oscc_flags &= ~OSCC_FLAG_SYNC_IN_PROGRESS;
 561                 if (rc == 0 || rc == -ENOSPC) {
 562                         struct obd_connect_data *ocd;
 563
 564                         if (rc == -ENOSPC)
 565                                 oscc->oscc_flags |= OSCC_FLAG_NOSPC;
 566                         oscc->oscc_flags &= ~OSCC_FLAG_RECOVERING;
 567
 568                         oscc->oscc_last_id = oa->o_id;
 569                         ocd = &imp->imp_connect_data;
 570                         if (ocd->ocd_connect_flags & OBD_CONNECT_SKIP_ORPHAN) {
 571                                 CDEBUG(D_HA, "%s: Skip orphan set, reset last "
 572                                        "objid\n", oscc->oscc_obd->obd_name);
 573                                 oscc->oscc_next_id = oa->o_id + 1;
 574                         }
 575
 576                         /* sanity check for next objid. see bug 17025 */
 577                         LASSERT(oscc->oscc_next_id == oa->o_id + 1);
 578
 579                         CDEBUG(D_HA, "%s: oscc recovery finished, last_id: "
 580                                LPU64", rc: %d\n", oscc->oscc_obd->obd_name,
 581                                oscc->oscc_last_id, rc);
 582                 } else {
 583                         CDEBUG(D_ERROR, "%s: oscc recovery failed: %d\n",
 584                                oscc->oscc_obd->obd_name, rc);
 585                 }
 586
 587                 cfs_waitq_signal(&oscc->oscc_waitq);
 588                 spin_unlock(&oscc->oscc_lock);
 589
 590                 if (rc < 0)
 591                         RETURN(rc);
 592         }
 593
 594         lsm = *ea;
 595         if (lsm == NULL) {
 596                 rc = obd_alloc_memmd(exp, &lsm);
 597                 if (rc < 0)
 598                         RETURN(rc);
 599         }
 600
 601         while (1) {
 602                 if (oscc_in_sync(oscc))
 603                         CDEBUG(D_HA,"%s: oscc recovery in progress, waiting\n",
 604                                oscc->oscc_obd->obd_name);
 605
 606                 rc = oscc_precreate(oscc);
 607                 if (rc) {
 608                         CDEBUG(D_HA,"%s: error create %d\n",
 609                                oscc->oscc_obd->obd_name, rc);
 610                         break;
 611                 }
 612
 613                 spin_lock(&oscc->oscc_lock);
 614                 if (oscc->oscc_flags & OSCC_FLAG_EXITING) {
 615                         spin_unlock(&oscc->oscc_lock);
 616                         break;
 617                 }
 618                 /* wakeup but recovery not finished */
 619                 if (oscc->oscc_flags & OSCC_FLAG_RECOVERING) {
 620                         rc = -EIO;
 621                         spin_unlock(&oscc->oscc_lock);
 622                         break;
 623                 }
 624
 625                 if (oscc_has_objects_nolock(oscc, 1)) {
 626                         memcpy(oa, &oscc->oscc_oa, sizeof(*oa));
 627                         oa->o_id = oscc->oscc_next_id;
 628                         lsm->lsm_object_id = oscc->oscc_next_id;
 629                         *ea = lsm;
 630                         oscc->oscc_next_id++;
 631                         spin_unlock(&oscc->oscc_lock);
 632
 633                         CDEBUG(D_RPCTRACE, "%s: set oscc_next_id = "LPU64"\n",
 634                                exp->exp_obd->obd_name, oscc->oscc_next_id);
 635                         break;
 636                 } else if (oscc->oscc_flags & OSCC_FLAG_NOSPC) {
 637                         rc = -ENOSPC;
 638                         spin_unlock(&oscc->oscc_lock);
 639                         break;
 640                 } else if (oscc->oscc_flags & OSCC_FLAG_RDONLY) {
 641                         rc = -EROFS;
 642                         spin_unlock(&oscc->oscc_lock);
 643                         break;
 644                 }
 645
 646                 spin_unlock(&oscc->oscc_lock);
 647         }
 648
 649         if (rc == 0)
 650                 CDEBUG(D_INFO, "%s: returning objid "LPU64"\n",
 651                        obd2cli_tgt(oscc->oscc_obd), lsm->lsm_object_id);
 652         else if (*ea == NULL)
 653                 obd_free_memmd(exp, &lsm);
 654         RETURN(rc);
 655 }
 656
 657 void oscc_init(struct obd_device *obd)
 658 {
 659         struct osc_creator *oscc;
 660
 661         if (obd == NULL)
 662                 return;
 663
 664         oscc = &obd->u.cli.cl_oscc;
 665
 666         memset(oscc, 0, sizeof(*oscc));
 667
 668         cfs_waitq_init(&oscc->oscc_waitq);
 669         spin_lock_init(&oscc->oscc_lock);
 670         oscc->oscc_obd = obd;
 671         oscc->oscc_grow_count = OST_MIN_PRECREATE;
 672         oscc->oscc_max_grow_count = OST_MAX_PRECREATE;
 673
 674         oscc->oscc_next_id = 2;
 675         oscc->oscc_last_id = 1;
 676         oscc->oscc_flags |= OSCC_FLAG_RECOVERING;
 677
 678         CFS_INIT_LIST_HEAD(&oscc->oscc_wait_create_list);
 679
 680         /* XXX the export handle should give the oscc the last object */
 681         /* oed->oed_oscc.oscc_last_id = exph->....; */
 682 }
 683
 684 void oscc_fini(struct obd_device *obd)
 685 {
 686         struct osc_creator *oscc = &obd->u.cli.cl_oscc;
 687         ENTRY;
 688
 689
 690         spin_lock(&oscc->oscc_lock);
 691         oscc->oscc_flags &= ~OSCC_FLAG_RECOVERING;
 692         oscc->oscc_flags |= OSCC_FLAG_EXITING;
 693         spin_unlock(&oscc->oscc_lock);
 694 }