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  * Copyright (c) 2011 Whamcloud, Inc.
  33  *
  34  */
  35 /*
  36  * This file is part of Lustre, http://www.lustre.org/
  37  * Lustre is a trademark of Sun Microsystems, Inc.
  38  *
  39  * lustre/osc/osc_create.c
  40  * For testing and management it is treated as an obd_device,
  41  * although * it does not export a full OBD method table (the
  42  * requests are coming * in over the wire, so object target modules
  43  * do not have a full * method table.)
  44  *
  45  * Author: Peter Braam <braam@clusterfs.com>
  46  */
  47
  48 #ifndef EXPORT_SYMTAB
  49 # define EXPORT_SYMTAB
  50 #endif
  51 #define DEBUG_SUBSYSTEM S_OSC
  52
  53 #ifdef __KERNEL__
  54 # include <libcfs/libcfs.h>
  55 #else /* __KERNEL__ */
  56 # include <liblustre.h>
  57 #endif
  58
  59 #ifdef  __CYGWIN__
  60 # include <ctype.h>
  61 #endif
  62
  63 #include <lustre_dlm.h>
  64 #include <obd_class.h>
  65 #include "osc_internal.h"
  66
  67 /* XXX need AT adjust ? */
  68 #define osc_create_timeout      (obd_timeout / 2)
  69
  70 struct osc_create_async_args {
  71         struct osc_creator      *rq_oscc;
  72         struct lov_stripe_md    *rq_lsm;
  73         struct obd_info         *rq_oinfo;
  74         int                      rq_grow_count;
  75 };
  76
  77 static int oscc_internal_create(struct osc_creator *oscc);
  78 static int handle_async_create(struct ptlrpc_request *req, int rc);
  79
  80 static int osc_interpret_create(const struct lu_env *env,
  81                                 struct ptlrpc_request *req, void *data, int rc)
  82 {
  83         struct osc_create_async_args *args = ptlrpc_req_async_args(req);
  84         struct osc_creator *oscc = args->rq_oscc;
  85         struct ost_body *body = NULL;
  86         struct ptlrpc_request *fake_req, *pos;
  87         ENTRY;
  88
  89         if (req->rq_repmsg) {
  90                 body = req_capsule_server_get(&req->rq_pill, &RMF_OST_BODY);
  91                 if (body == NULL && rc == 0)
  92                         rc = -EPROTO;
  93         }
  94
  95         LASSERT(oscc && (oscc->oscc_obd != LP_POISON));
  96
  97         cfs_spin_lock(&oscc->oscc_lock);
  98         oscc->oscc_flags &= ~OSCC_FLAG_CREATING;
  99         switch (rc) {
 100         case 0: {
 101                 if (body) {
 102                         int diff =ostid_id(&body->oa.o_oi)- oscc->oscc_last_id;
 103
 104                         /* oscc_internal_create() stores the original value of
 105                          * grow_count in osc_create_async_args::rq_grow_count.
 106                          * We can't compare against oscc_grow_count directly,
 107                          * because it may have been increased while the RPC
 108                          * is in flight, so we would always find ourselves
 109                          * having created fewer objects and decreasing the
 110                          * precreate request size.  b=18577 */
 111                         if (diff < args->rq_grow_count) {
 112                                 /* the OST has not managed to create all the
 113                                  * objects we asked for */
 114                                 oscc->oscc_grow_count = max(diff,
 115                                                             OST_MIN_PRECREATE);
 116                                 /* don't bump grow_count next time */
 117                                 oscc->oscc_flags |= OSCC_FLAG_LOW;
 118                         } else {
 119                                 /* the OST is able to keep up with the work,
 120                                  * we could consider increasing grow_count
 121                                  * next time if needed */
 122                                 oscc->oscc_flags &= ~OSCC_FLAG_LOW;
 123                         }
 124                         oscc->oscc_last_id = ostid_id(&body->oa.o_oi);
 125                 }
 126                 cfs_spin_unlock(&oscc->oscc_lock);
 127                 break;
 128         }
 129         case -EROFS:
 130                 oscc->oscc_flags |= OSCC_FLAG_RDONLY;
 131         case -ENOSPC:
 132         case -EFBIG:
 133                 if (rc != -EROFS) {
 134                         oscc->oscc_flags |= OSCC_FLAG_NOSPC;
 135                         if (body && rc == -ENOSPC) {
 136                                 oscc->oscc_last_id = body->oa.o_id;
 137                                 oscc->oscc_grow_count = OST_MIN_PRECREATE;
 138
 139                                 if ((body->oa.o_valid & OBD_MD_FLFLAGS) &&
 140                                     (body->oa.o_flags & OBD_FL_NOSPC_BLK))
 141                                         oscc->oscc_flags |= OSCC_FLAG_NOSPC_BLK;
 142                                 else
 143                                         rc = 0;
 144                         }
 145                 }
 146                 cfs_spin_unlock(&oscc->oscc_lock);
 147                 DEBUG_REQ(D_INODE, req, "OST out of space, flagging");
 148                 break;
 149         case -EIO: {
 150                 /* filter always set body->oa.o_id as the last_id
 151                  * of filter (see filter_handle_precreate for detail)*/
 152                 if (body && body->oa.o_id > oscc->oscc_last_id)
 153                         oscc->oscc_last_id = body->oa.o_id;
 154                 cfs_spin_unlock(&oscc->oscc_lock);
 155                 break;
 156         }
 157         case -EINTR:
 158         case -EWOULDBLOCK: {
 159                 /* aka EAGAIN we should not delay create if import failed -
 160                  * this avoid client stick in create and avoid race with
 161                  * delorphan */
 162                 /* EINTR say - old create request is killed due mds<>ost
 163                  * eviction - OSCC_FLAG_RECOVERING can already set due
 164                  * IMP_DISCONN event */
 165                 oscc->oscc_flags |= OSCC_FLAG_RECOVERING;
 166                 /* oscc->oscc_grow_count = OST_MIN_PRECREATE; */
 167                 cfs_spin_unlock(&oscc->oscc_lock);
 168                 break;
 169         }
 170         default: {
 171                 oscc->oscc_flags |= OSCC_FLAG_RECOVERING;
 172                 oscc->oscc_grow_count = OST_MIN_PRECREATE;
 173                 cfs_spin_unlock(&oscc->oscc_lock);
 174                 DEBUG_REQ(D_ERROR, req,
 175                           "Unknown rc %d from async create: failing oscc", rc);
 176                 ptlrpc_fail_import(req->rq_import,
 177                                    lustre_msg_get_conn_cnt(req->rq_reqmsg));
 178         }
 179         }
 180
 181         CDEBUG(D_HA, "preallocated through id "LPU64" (next to use "LPU64")\n",
 182                oscc->oscc_last_id, oscc->oscc_next_id);
 183
 184         cfs_spin_lock(&oscc->oscc_lock);
 185         cfs_list_for_each_entry_safe(fake_req, pos,
 186                                      &oscc->oscc_wait_create_list, rq_list) {
 187                 if (handle_async_create(fake_req, rc) == -EAGAIN) {
 188                         oscc_internal_create(oscc);
 189                         /* sending request should be never fail because
 190                          * osc use preallocated requests pool */
 191                         GOTO(exit_wakeup, rc);
 192                 }
 193         }
 194         cfs_spin_unlock(&oscc->oscc_lock);
 195
 196 exit_wakeup:
 197         cfs_waitq_signal(&oscc->oscc_waitq);
 198         RETURN(rc);
 199 }
 200
 201 static int oscc_internal_create(struct osc_creator *oscc)
 202 {
 203         struct osc_create_async_args *args;
 204         struct ptlrpc_request *request;
 205         struct ost_body *body;
 206         ENTRY;
 207
 208         LASSERT_SPIN_LOCKED(&oscc->oscc_lock);
 209
 210         /* Do not check for a degraded OST here - bug21563/bug18539 */
 211         if (oscc->oscc_flags & OSCC_FLAG_RECOVERING) {
 212                 cfs_spin_unlock(&oscc->oscc_lock);
 213                 RETURN(0);
 214         }
 215
 216         /* we need check it before OSCC_FLAG_CREATING - because need
 217          * see lower number of precreate objects */
 218         if (oscc->oscc_grow_count < oscc->oscc_max_grow_count &&
 219             ((oscc->oscc_flags & OSCC_FLAG_LOW) == 0) &&
 220             (__s64)(oscc->oscc_last_id - oscc->oscc_next_id) <=
 221                    (oscc->oscc_grow_count / 4 + 1)) {
 222                 oscc->oscc_flags |= OSCC_FLAG_LOW;
 223                 oscc->oscc_grow_count *= 2;
 224         }
 225
 226         if (oscc->oscc_flags & OSCC_FLAG_CREATING) {
 227                 cfs_spin_unlock(&oscc->oscc_lock);
 228                 RETURN(0);
 229         }
 230
 231         if (oscc->oscc_grow_count > oscc->oscc_max_grow_count / 2)
 232                 oscc->oscc_grow_count = oscc->oscc_max_grow_count / 2;
 233
 234         oscc->oscc_flags |= OSCC_FLAG_CREATING;
 235         cfs_spin_unlock(&oscc->oscc_lock);
 236
 237         request = ptlrpc_request_alloc_pack(oscc->oscc_obd->u.cli.cl_import,
 238                                             &RQF_OST_CREATE,
 239                                             LUSTRE_OST_VERSION, OST_CREATE);
 240         if (request == NULL) {
 241                 cfs_spin_lock(&oscc->oscc_lock);
 242                 oscc->oscc_flags &= ~OSCC_FLAG_CREATING;
 243                 cfs_spin_unlock(&oscc->oscc_lock);
 244                 RETURN(-ENOMEM);
 245         }
 246
 247         request->rq_request_portal = OST_CREATE_PORTAL;
 248         ptlrpc_at_set_req_timeout(request);
 249         body = req_capsule_client_get(&request->rq_pill, &RMF_OST_BODY);
 250         args = ptlrpc_req_async_args(request);
 251         args->rq_oscc = oscc;
 252
 253         cfs_spin_lock(&oscc->oscc_lock);
 254         args->rq_grow_count = oscc->oscc_grow_count;
 255
 256         if (likely(fid_seq_is_mdt(oscc->oscc_oa.o_seq))) {
 257                 body->oa.o_oi.oi_seq = oscc->oscc_oa.o_seq;
 258                 body->oa.o_oi.oi_id  = oscc->oscc_last_id +
 259                                        oscc->oscc_grow_count;
 260         } else {
 261                 /*Just warning here currently, since not sure how fid-on-ost
 262                  *will be implemented here */
 263                 CWARN("o_seq: "LPU64" is not indicate any MDTs.\n",
 264                        oscc->oscc_oa.o_seq);
 265         }
 266         cfs_spin_unlock(&oscc->oscc_lock);
 267
 268         body->oa.o_valid |= OBD_MD_FLID | OBD_MD_FLGROUP;
 269         CDEBUG(D_RPCTRACE, "prealloc through id "LPU64" (last seen "LPU64")\n",
 270                body->oa.o_id, oscc->oscc_last_id);
 271
 272         /* we should not resend create request - anyway we will have delorphan
 273          * and kill these objects */
 274         request->rq_no_delay = request->rq_no_resend = 1;
 275         ptlrpc_request_set_replen(request);
 276
 277         request->rq_interpret_reply = osc_interpret_create;
 278         ptlrpcd_add_req(request, PDL_POLICY_ROUND, -1);
 279
 280         RETURN(0);
 281 }
 282
 283 static int oscc_has_objects_nolock(struct osc_creator *oscc, int count)
 284 {
 285         return ((__s64)(oscc->oscc_last_id - oscc->oscc_next_id) >= count);
 286 }
 287
 288 static int oscc_has_objects(struct osc_creator *oscc, int count)
 289 {
 290         int have_objs;
 291
 292         cfs_spin_lock(&oscc->oscc_lock);
 293         have_objs = oscc_has_objects_nolock(oscc, count);
 294         cfs_spin_unlock(&oscc->oscc_lock);
 295
 296         return have_objs;
 297 }
 298
 299 static int oscc_wait_for_objects(struct osc_creator *oscc, int count)
 300 {
 301         int have_objs;
 302         int ost_unusable;
 303
 304         ost_unusable = oscc->oscc_obd->u.cli.cl_import->imp_invalid;
 305
 306         cfs_spin_lock(&oscc->oscc_lock);
 307         ost_unusable |= (OSCC_FLAG_NOSPC | OSCC_FLAG_RDONLY |
 308                          OSCC_FLAG_EXITING) & oscc->oscc_flags;
 309         have_objs = oscc_has_objects_nolock(oscc, count);
 310
 311         if (!ost_unusable && !have_objs)
 312                 /* they release lock himself */
 313                 have_objs = oscc_internal_create(oscc);
 314         else
 315                 cfs_spin_unlock(&oscc->oscc_lock);
 316
 317         return have_objs || ost_unusable;
 318 }
 319
 320 static int oscc_precreate(struct osc_creator *oscc)
 321 {
 322         struct l_wait_info lwi;
 323         int rc = 0;
 324         ENTRY;
 325
 326         if (oscc_has_objects(oscc, oscc->oscc_grow_count / 2))
 327                 RETURN(0);
 328
 329         /* we should be not block forever - because client's create rpc can
 330          * stick in mds for long time and forbid client reconnect */
 331         lwi = LWI_TIMEOUT(cfs_timeout_cap(cfs_time_seconds(osc_create_timeout)),
 332                           NULL, NULL);
 333
 334         rc = l_wait_event(oscc->oscc_waitq, oscc_wait_for_objects(oscc, 1), &lwi);
 335         RETURN(rc);
 336 }
 337
 338 static int oscc_in_sync(struct osc_creator *oscc)
 339 {
 340         int sync;
 341
 342         cfs_spin_lock(&oscc->oscc_lock);
 343         sync = oscc->oscc_flags & OSCC_FLAG_SYNC_IN_PROGRESS;
 344         cfs_spin_unlock(&oscc->oscc_lock);
 345
 346         return sync;
 347 }
 348
 349 /* decide if the OST has remaining object, return value :
 350         0 : the OST has remaining objects, may or may not send precreation RPC.
 351         1 : the OST has no remaining object, and the sent precreation RPC
 352             has not been completed yet.
 353         2 : the OST has no remaining object, and will not get any for
 354             a potentially very long time
 355      1000 : unusable
 356  */
 357 int osc_precreate(struct obd_export *exp)
 358 {
 359         struct osc_creator *oscc = &exp->exp_obd->u.cli.cl_oscc;
 360         struct obd_import *imp = exp->exp_imp_reverse;
 361         int rc;
 362         ENTRY;
 363
 364         LASSERT(oscc != NULL);
 365         if (imp != NULL && imp->imp_deactive)
 366                 GOTO(out_nolock, rc = 1000);
 367
 368         /* Handle critical states first */
 369         cfs_spin_lock(&oscc->oscc_lock);
 370         if (oscc->oscc_flags & OSCC_FLAG_NOSPC_BLK ||
 371             oscc->oscc_flags & OSCC_FLAG_RDONLY ||
 372             oscc->oscc_flags & OSCC_FLAG_EXITING)
 373                 GOTO(out, rc = 1000);
 374
 375         if ((oscc->oscc_flags & OSCC_FLAG_RECOVERING) ||
 376             (oscc->oscc_flags & OSCC_FLAG_DEGRADED))
 377                 GOTO(out, rc = 2);
 378
 379         if (oscc_has_objects_nolock(oscc, oscc->oscc_grow_count / 2))
 380                 GOTO(out, rc = 0);
 381
 382         /* Return 0, if we have at least one object - bug 22884 */
 383         rc = oscc_has_objects_nolock(oscc, 1) ? 0 : 1;
 384
 385         if (oscc->oscc_flags & OSCC_FLAG_NOSPC)
 386                 GOTO(out, (rc == 0) ? 0 : 1000);
 387
 388         /* Do not check for OSCC_FLAG_CREATING flag here, let
 389          * osc_precreate() call oscc_internal_create() and
 390          * adjust oscc_grow_count bug21563 */
 391         if (oscc->oscc_flags & OSCC_FLAG_SYNC_IN_PROGRESS)
 392                 GOTO(out, rc);
 393
 394         if (oscc_internal_create(oscc))
 395                 GOTO(out_nolock, rc = 1000);
 396
 397         RETURN(rc);
 398 out:
 399         cfs_spin_unlock(&oscc->oscc_lock);
 400 out_nolock:
 401         return rc;
 402 }
 403
 404 static int handle_async_create(struct ptlrpc_request *req, int rc)
 405 {
 406         struct osc_create_async_args *args = ptlrpc_req_async_args(req);
 407         struct osc_creator    *oscc = args->rq_oscc;
 408         struct lov_stripe_md  *lsm  = args->rq_lsm;
 409         struct obd_info       *oinfo = args->rq_oinfo;
 410         struct obdo           *oa = oinfo->oi_oa;
 411
 412         LASSERT_SPIN_LOCKED(&oscc->oscc_lock);
 413
 414         if(rc)
 415                 GOTO(out_wake, rc);
 416
 417         /* Handle the critical type errors first.
 418          * Should we also test cl_import state as well ? */
 419         if (oscc->oscc_flags & OSCC_FLAG_EXITING)
 420                 GOTO(out_wake, rc = -EIO);
 421
 422         if (oscc->oscc_flags & OSCC_FLAG_NOSPC_BLK)
 423                 GOTO(out_wake, rc = -ENOSPC);
 424
 425         if (oscc->oscc_flags & OSCC_FLAG_RDONLY)
 426                 GOTO(out_wake, rc = -EROFS);
 427
 428         /* should be try wait until recovery finished */
 429         if((oscc->oscc_flags & OSCC_FLAG_RECOVERING) ||
 430            (oscc->oscc_flags & OSCC_FLAG_DEGRADED))
 431                 RETURN(-EAGAIN);
 432
 433         if (oscc_has_objects_nolock(oscc, 1)) {
 434                 memcpy(oa, &oscc->oscc_oa, sizeof(*oa));
 435                 oa->o_id = oscc->oscc_next_id;
 436                 lsm->lsm_object_id = oscc->oscc_next_id;
 437                 oscc->oscc_next_id++;
 438
 439                 CDEBUG(D_RPCTRACE, " set oscc_next_id = "LPU64"\n",
 440                        oscc->oscc_next_id);
 441                 GOTO(out_wake, rc = 0);
 442         }
 443
 444         /* we don't have objects now - continue wait */
 445         RETURN(-EAGAIN);
 446
 447 out_wake:
 448
 449         rc = oinfo->oi_cb_up(oinfo, rc);
 450         ptlrpc_fakereq_finished(req);
 451
 452         RETURN(rc);
 453 }
 454
 455 static int async_create_interpret(const struct lu_env *env,
 456                                   struct ptlrpc_request *req, void *data,
 457                                   int rc)
 458 {
 459         struct osc_create_async_args *args = ptlrpc_req_async_args(req);
 460         struct osc_creator    *oscc = args->rq_oscc;
 461         int ret;
 462
 463         cfs_spin_lock(&oscc->oscc_lock);
 464         ret = handle_async_create(req, rc);
 465         cfs_spin_unlock(&oscc->oscc_lock);
 466
 467         return ret;
 468 }
 469
 470 int osc_create_async(struct obd_export *exp, struct obd_info *oinfo,
 471                      struct lov_stripe_md **ea, struct obd_trans_info *oti)
 472 {
 473         int rc;
 474         struct ptlrpc_request *fake_req;
 475         struct osc_create_async_args *args;
 476         struct osc_creator *oscc = &exp->exp_obd->u.cli.cl_oscc;
 477         struct obdo *oa = oinfo->oi_oa;
 478         ENTRY;
 479
 480         if ((oa->o_valid & OBD_MD_FLGROUP) && !fid_seq_is_mdt(oa->o_seq)) {
 481                 rc = osc_real_create(exp, oinfo->oi_oa, ea, oti);
 482                 rc = oinfo->oi_cb_up(oinfo, rc);
 483                 RETURN(rc);
 484         }
 485
 486         if ((oa->o_valid & OBD_MD_FLFLAGS) &&
 487             oa->o_flags == OBD_FL_RECREATE_OBJS) {
 488                 rc = osc_real_create(exp, oinfo->oi_oa, ea, oti);
 489                 rc = oinfo->oi_cb_up(oinfo, rc);
 490                 RETURN(rc);
 491         }
 492
 493         LASSERT((*ea) != NULL);
 494
 495         fake_req = ptlrpc_prep_fakereq(oscc->oscc_obd->u.cli.cl_import,
 496                                        osc_create_timeout,
 497                                        async_create_interpret);
 498         if (fake_req == NULL) {
 499                 rc = oinfo->oi_cb_up(oinfo, -ENOMEM);
 500                 RETURN(-ENOMEM);
 501         }
 502
 503         args = ptlrpc_req_async_args(fake_req);
 504         CLASSERT(sizeof(*args) <= sizeof(fake_req->rq_async_args));
 505
 506         args->rq_oscc  = oscc;
 507         args->rq_lsm   = *ea;
 508         args->rq_oinfo = oinfo;
 509
 510         cfs_spin_lock(&oscc->oscc_lock);
 511         /* try fast path */
 512         rc = handle_async_create(fake_req, 0);
 513         if (rc == -EAGAIN) {
 514                 /* We don't have any objects, wait until we get a reply. */
 515                 ptlrpcd_add_req(fake_req, PDL_POLICY_ROUND, -1);
 516                 cfs_list_add(&fake_req->rq_list,
 517                              &oscc->oscc_wait_create_list);
 518                 cfs_spin_unlock(&oscc->oscc_lock);
 519                 /* EAGAIN mean - request is delayed */
 520                 rc = 0;
 521         } else {
 522                 cfs_spin_unlock(&oscc->oscc_lock);
 523                 /* need free request if was error hit or
 524                  * objects already allocated */
 525                 ptlrpc_req_finished(fake_req);
 526         }
 527
 528         RETURN(rc);
 529 }
 530
 531 int osc_create(struct obd_export *exp, struct obdo *oa,
 532                struct lov_stripe_md **ea, struct obd_trans_info *oti)
 533 {
 534         struct osc_creator *oscc = &exp->exp_obd->u.cli.cl_oscc;
 535         struct obd_import  *imp  = exp->exp_obd->u.cli.cl_import;
 536         struct lov_stripe_md *lsm;
 537         int del_orphan = 0, rc = 0;
 538         ENTRY;
 539
 540         LASSERT(oa);
 541         LASSERT(ea);
 542         LASSERT(oa->o_valid & OBD_MD_FLGROUP);
 543
 544         if ((oa->o_valid & OBD_MD_FLFLAGS) &&
 545             oa->o_flags == OBD_FL_RECREATE_OBJS) {
 546                 RETURN(osc_real_create(exp, oa, ea, oti));
 547         }
 548
 549         if (!fid_seq_is_mdt(oa->o_seq))
 550                 RETURN(osc_real_create(exp, oa, ea, oti));
 551
 552         /* this is the special case where create removes orphans */
 553         if (oa->o_valid & OBD_MD_FLFLAGS &&
 554             oa->o_flags == OBD_FL_DELORPHAN) {
 555                 cfs_spin_lock(&oscc->oscc_lock);
 556                 if (oscc->oscc_flags & OSCC_FLAG_SYNC_IN_PROGRESS) {
 557                         cfs_spin_unlock(&oscc->oscc_lock);
 558                         RETURN(-EBUSY);
 559                 }
 560                 if (!(oscc->oscc_flags & OSCC_FLAG_RECOVERING)) {
 561                         cfs_spin_unlock(&oscc->oscc_lock);
 562                         RETURN(0);
 563                 }
 564
 565                 oscc->oscc_flags |= OSCC_FLAG_SYNC_IN_PROGRESS;
 566                 /* seting flag LOW we prevent extra grow precreate size
 567                  * and enforce use last assigned size */
 568                 oscc->oscc_flags |= OSCC_FLAG_LOW;
 569                 cfs_spin_unlock(&oscc->oscc_lock);
 570                 CDEBUG(D_HA, "%s: oscc recovery started - delete to "LPU64"\n",
 571                        oscc->oscc_obd->obd_name, oscc->oscc_next_id - 1);
 572
 573                 del_orphan = 1;
 574
 575                 /* delete from next_id on up */
 576                 oa->o_valid |= OBD_MD_FLID;
 577                 oa->o_id = oscc->oscc_next_id - 1;
 578
 579                 rc = osc_real_create(exp, oa, ea, NULL);
 580
 581                 cfs_spin_lock(&oscc->oscc_lock);
 582                 oscc->oscc_flags &= ~OSCC_FLAG_SYNC_IN_PROGRESS;
 583                 if (rc == 0 || rc == -ENOSPC) {
 584                         struct obd_connect_data *ocd;
 585
 586                         if (rc == -ENOSPC) {
 587                                 oscc->oscc_flags |= OSCC_FLAG_NOSPC;
 588                                 if ((oa->o_valid & OBD_MD_FLFLAGS) &&
 589                                     (oa->o_flags & OBD_FL_NOSPC_BLK))
 590                                         oscc->oscc_flags |= OSCC_FLAG_NOSPC_BLK;
 591                         }
 592                         oscc->oscc_flags &= ~OSCC_FLAG_RECOVERING;
 593
 594                         oscc->oscc_last_id = oa->o_id;
 595                         ocd = &imp->imp_connect_data;
 596                         if (ocd->ocd_connect_flags & OBD_CONNECT_SKIP_ORPHAN) {
 597                                 /*
 598                                  * The OST reports back in oa->o_id from where
 599                                  * we should restart in order to skip orphan
 600                                  * objects
 601                                  */
 602                                 CDEBUG(D_HA, "%s: Skip orphan set, reset last "
 603                                        "objid\n", oscc->oscc_obd->obd_name);
 604                                 oscc->oscc_next_id = oa->o_id + 1;
 605                         }
 606
 607                         /* sanity check for next objid. see bug 17025 */
 608                         LASSERT(oscc->oscc_next_id == oa->o_id + 1);
 609
 610                         CDEBUG(D_HA, "%s: oscc recovery finished, last_id: "
 611                                LPU64", rc: %d\n", oscc->oscc_obd->obd_name,
 612                                oscc->oscc_last_id, rc);
 613                 } else {
 614                         CDEBUG(D_ERROR, "%s: oscc recovery failed: %d\n",
 615                                oscc->oscc_obd->obd_name, rc);
 616                 }
 617
 618                 cfs_waitq_signal(&oscc->oscc_waitq);
 619                 cfs_spin_unlock(&oscc->oscc_lock);
 620
 621                 if (rc < 0)
 622                         RETURN(rc);
 623         }
 624
 625         lsm = *ea;
 626         if (lsm == NULL) {
 627                 rc = obd_alloc_memmd(exp, &lsm);
 628                 if (rc < 0)
 629                         RETURN(rc);
 630         }
 631
 632         while (1) {
 633                 if (oscc_in_sync(oscc))
 634                         CDEBUG(D_HA,"%s: oscc recovery in progress, waiting\n",
 635                                oscc->oscc_obd->obd_name);
 636
 637                 rc = oscc_precreate(oscc);
 638                 if (rc)
 639                         CDEBUG(D_HA,"%s: error create %d\n",
 640                                oscc->oscc_obd->obd_name, rc);
 641
 642                 cfs_spin_lock(&oscc->oscc_lock);
 643
 644                 /* wakeup but recovery did not finished */
 645                 if ((oscc->oscc_obd->u.cli.cl_import->imp_invalid) ||
 646                     (oscc->oscc_flags & OSCC_FLAG_RECOVERING)) {
 647                         rc = -EIO;
 648                         cfs_spin_unlock(&oscc->oscc_lock);
 649                         break;
 650                 }
 651
 652                 if (oscc->oscc_flags & OSCC_FLAG_NOSPC_BLK) {
 653                         rc = -ENOSPC;
 654                         cfs_spin_unlock(&oscc->oscc_lock);
 655                         break;
 656                 }
 657
 658                 if (oscc->oscc_flags & OSCC_FLAG_RDONLY) {
 659                         rc = -EROFS;
 660                         cfs_spin_unlock(&oscc->oscc_lock);
 661                         break;
 662                 }
 663
 664                 // Should we report -EIO error ?
 665                 if (oscc->oscc_flags & OSCC_FLAG_EXITING) {
 666                         cfs_spin_unlock(&oscc->oscc_lock);
 667                         break;
 668                 }
 669
 670                 /**
 671                  * If this is DELORPHAN process, no need create object here,
 672                  * otherwise this will create a gap of object id, and MDS
 673                  * might create some orphan log (mds_lov_update_objids), then
 674                  * remove objects wrongly on OST. Bug 21379.
 675                  */
 676                 if (oa->o_valid & OBD_MD_FLFLAGS &&
 677                         oa->o_flags == OBD_FL_DELORPHAN) {
 678                         cfs_spin_unlock(&oscc->oscc_lock);
 679                         break;
 680                 }
 681
 682                 if (oscc_has_objects_nolock(oscc, 1)) {
 683                         memcpy(oa, &oscc->oscc_oa, sizeof(*oa));
 684                         oa->o_id = oscc->oscc_next_id;
 685                         lsm->lsm_object_id = oscc->oscc_next_id;
 686                         *ea = lsm;
 687                         oscc->oscc_next_id++;
 688                         cfs_spin_unlock(&oscc->oscc_lock);
 689
 690                         CDEBUG(D_RPCTRACE, "%s: set oscc_next_id = "LPU64"\n",
 691                                exp->exp_obd->obd_name, oscc->oscc_next_id);
 692                         break;
 693                 }
 694
 695                 if (oscc->oscc_flags & OSCC_FLAG_NOSPC) {
 696                         rc = -ENOSPC;
 697                         cfs_spin_unlock(&oscc->oscc_lock);
 698                         break;
 699                 }
 700
 701                 cfs_spin_unlock(&oscc->oscc_lock);
 702         }
 703
 704         if (rc == 0) {
 705                 CDEBUG(D_INFO, "%s: returning objid "LPU64"\n",
 706                        obd2cli_tgt(oscc->oscc_obd), lsm->lsm_object_id);
 707         } else {
 708                 if (*ea == NULL)
 709                         obd_free_memmd(exp, &lsm);
 710                 if (del_orphan != 0 && rc != -EIO)
 711                         /* Ignore non-IO precreate error for clear orphan */
 712                         rc = 0;
 713         }
 714         RETURN(rc);
 715 }
 716
 717 void oscc_init(struct obd_device *obd)
 718 {
 719         struct osc_creator *oscc;
 720
 721         if (obd == NULL)
 722                 return;
 723
 724         oscc = &obd->u.cli.cl_oscc;
 725
 726         memset(oscc, 0, sizeof(*oscc));
 727
 728         cfs_waitq_init(&oscc->oscc_waitq);
 729         cfs_spin_lock_init(&oscc->oscc_lock);
 730         oscc->oscc_obd = obd;
 731         oscc->oscc_grow_count = OST_MIN_PRECREATE;
 732         oscc->oscc_max_grow_count = OST_MAX_PRECREATE;
 733
 734         oscc->oscc_next_id = 2;
 735         oscc->oscc_last_id = 1;
 736         oscc->oscc_flags |= OSCC_FLAG_RECOVERING;
 737
 738         CFS_INIT_LIST_HEAD(&oscc->oscc_wait_create_list);
 739
 740         /* XXX the export handle should give the oscc the last object */
 741         /* oed->oed_oscc.oscc_last_id = exph->....; */
 742 }
 743
 744 void oscc_fini(struct obd_device *obd)
 745 {
 746         struct osc_creator *oscc = &obd->u.cli.cl_oscc;
 747         ENTRY;
 748
 749
 750         cfs_spin_lock(&oscc->oscc_lock);
 751         oscc->oscc_flags &= ~OSCC_FLAG_RECOVERING;
 752         oscc->oscc_flags |= OSCC_FLAG_EXITING;
 753         cfs_spin_unlock(&oscc->oscc_lock);
 754 }