lustre/ofd/ofd_dev.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) 2009, 2010, Oracle and/or its affiliates. All rights reserved.
  28  * Use is subject to license terms.
  29  *
  30  * Copyright (c) 2012, 2013, Intel Corporation.
  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/ofd/ofd.c
  37  *
  38  * Author: Alex Zhuravlev <bzzz@whamcloud.com>
  39  * Author: Mike Pershin <tappro@whamcloud.com>
  40  * Author: Johann Lombardi <johann@whamcloud.com>
  41  */
  42
  43 #define DEBUG_SUBSYSTEM S_FILTER
  44
  45 #include <obd_class.h>
  46 #include <lustre_param.h>
  47 #include <lustre_fid.h>
  48 #include <lustre_lfsck.h>
  49 #include <lustre/lustre_idl.h>
  50 #include <lustre_dlm.h>
  51 #include <lustre_quota.h>
  52
  53 #include "ofd_internal.h"
  54
  55 /* Slab for OFD object allocation */
  56 static struct kmem_cache *ofd_object_kmem;
  57
  58 static struct lu_kmem_descr ofd_caches[] = {
  59         {
  60                 .ckd_cache = &ofd_object_kmem,
  61                 .ckd_name  = "ofd_obj",
  62                 .ckd_size  = sizeof(struct ofd_object)
  63         },
  64         {
  65                 .ckd_cache = NULL
  66         }
  67 };
  68
  69 static int ofd_connect_to_next(const struct lu_env *env, struct ofd_device *m,
  70                                const char *next, struct obd_export **exp)
  71 {
  72         struct obd_connect_data *data = NULL;
  73         struct obd_device       *obd;
  74         int                      rc;
  75         ENTRY;
  76
  77         OBD_ALLOC_PTR(data);
  78         if (data == NULL)
  79                 GOTO(out, rc = -ENOMEM);
  80
  81         obd = class_name2obd(next);
  82         if (obd == NULL) {
  83                 CERROR("%s: can't locate next device: %s\n",
  84                        ofd_name(m), next);
  85                 GOTO(out, rc = -ENOTCONN);
  86         }
  87
  88         data->ocd_connect_flags = OBD_CONNECT_VERSION;
  89         data->ocd_version = LUSTRE_VERSION_CODE;
  90
  91         rc = obd_connect(NULL, exp, obd, &obd->obd_uuid, data, NULL);
  92         if (rc) {
  93                 CERROR("%s: cannot connect to next dev %s: rc = %d\n",
  94                        ofd_name(m), next, rc);
  95                 GOTO(out, rc);
  96         }
  97
  98         m->ofd_dt_dev.dd_lu_dev.ld_site =
  99                 m->ofd_osd_exp->exp_obd->obd_lu_dev->ld_site;
 100         LASSERT(m->ofd_dt_dev.dd_lu_dev.ld_site);
 101         m->ofd_osd = lu2dt_dev(m->ofd_osd_exp->exp_obd->obd_lu_dev);
 102         m->ofd_dt_dev.dd_lu_dev.ld_site->ls_top_dev = &m->ofd_dt_dev.dd_lu_dev;
 103
 104 out:
 105         if (data)
 106                 OBD_FREE_PTR(data);
 107         RETURN(rc);
 108 }
 109
 110 static int ofd_stack_init(const struct lu_env *env,
 111                           struct ofd_device *m, struct lustre_cfg *cfg)
 112 {
 113         const char              *dev = lustre_cfg_string(cfg, 0);
 114         struct lu_device        *d;
 115         struct ofd_thread_info  *info = ofd_info(env);
 116         struct lustre_mount_info *lmi;
 117         int                      rc;
 118         char                    *osdname;
 119
 120         ENTRY;
 121
 122         lmi = server_get_mount(dev);
 123         if (lmi == NULL) {
 124                 CERROR("Cannot get mount info for %s!\n", dev);
 125                 RETURN(-ENODEV);
 126         }
 127
 128         /* find bottom osd */
 129         OBD_ALLOC(osdname, MTI_NAME_MAXLEN);
 130         if (osdname == NULL)
 131                 RETURN(-ENOMEM);
 132
 133         snprintf(osdname, MTI_NAME_MAXLEN, "%s-osd", dev);
 134         rc = ofd_connect_to_next(env, m, osdname, &m->ofd_osd_exp);
 135         OBD_FREE(osdname, MTI_NAME_MAXLEN);
 136         if (rc)
 137                 RETURN(rc);
 138
 139         d = m->ofd_osd_exp->exp_obd->obd_lu_dev;
 140         LASSERT(d);
 141         m->ofd_osd = lu2dt_dev(d);
 142
 143         snprintf(info->fti_u.name, sizeof(info->fti_u.name),
 144                  "%s-osd", lustre_cfg_string(cfg, 0));
 145
 146         RETURN(rc);
 147 }
 148
 149 static void ofd_stack_fini(const struct lu_env *env, struct ofd_device *m,
 150                            struct lu_device *top)
 151 {
 152         struct obd_device       *obd = ofd_obd(m);
 153         struct lustre_cfg_bufs   bufs;
 154         struct lustre_cfg       *lcfg;
 155         char                     flags[3] = "";
 156
 157         ENTRY;
 158
 159         lu_site_purge(env, top->ld_site, ~0);
 160         /* process cleanup, pass mdt obd name to get obd umount flags */
 161         lustre_cfg_bufs_reset(&bufs, obd->obd_name);
 162         if (obd->obd_force)
 163                 strcat(flags, "F");
 164         if (obd->obd_fail)
 165                 strcat(flags, "A");
 166         lustre_cfg_bufs_set_string(&bufs, 1, flags);
 167         lcfg = lustre_cfg_new(LCFG_CLEANUP, &bufs);
 168         if (!lcfg) {
 169                 CERROR("Cannot alloc lcfg!\n");
 170                 RETURN_EXIT;
 171         }
 172
 173         LASSERT(top);
 174         top->ld_ops->ldo_process_config(env, top, lcfg);
 175         lustre_cfg_free(lcfg);
 176
 177         lu_site_purge(env, top->ld_site, ~0);
 178         if (!cfs_hash_is_empty(top->ld_site->ls_obj_hash)) {
 179                 LIBCFS_DEBUG_MSG_DATA_DECL(msgdata, D_ERROR, NULL);
 180                 lu_site_print(env, top->ld_site, &msgdata, lu_cdebug_printer);
 181         }
 182
 183         LASSERT(m->ofd_osd_exp);
 184         obd_disconnect(m->ofd_osd_exp);
 185
 186         EXIT;
 187 }
 188
 189 /* For interoperability, see mdt_interop_param[]. */
 190 static struct cfg_interop_param ofd_interop_param[] = {
 191         { "ost.quota_type",     NULL },
 192         { NULL }
 193 };
 194
 195 /* Some parameters were moved from ofd to osd and only their
 196  * symlinks were kept in ofd by LU-3106. They are:
 197  * -writehthrough_cache_enable
 198  * -readcache_max_filese
 199  * -read_cache_enable
 200  * -brw_stats
 201  * Since they are not included by the static lprocfs var list,
 202  * a pre-check is added for them to avoid "unknown param" error
 203  * message confuses the customer. If they are matched in this
 204  * check, they will be passed to the osd directly.
 205  */
 206 static bool match_symlink_param(char *param)
 207 {
 208         char *sval;
 209         int paramlen;
 210
 211         if (class_match_param(param, PARAM_OST, &param) == 0) {
 212                 sval = strchr(param, '=');
 213                 if (sval != NULL) {
 214                         paramlen = sval - param;
 215                         if (strncmp(param, "writethrough_cache_enable",
 216                                     paramlen) == 0 ||
 217                             strncmp(param, "readcache_max_filesize",
 218                                     paramlen) == 0 ||
 219                             strncmp(param, "read_cache_enable",
 220                                     paramlen) == 0 ||
 221                             strncmp(param, "brw_stats", paramlen) == 0)
 222                                 return true;
 223                 }
 224         }
 225
 226         return false;
 227 }
 228
 229 /* used by MGS to process specific configurations */
 230 static int ofd_process_config(const struct lu_env *env, struct lu_device *d,
 231                               struct lustre_cfg *cfg)
 232 {
 233         struct ofd_device       *m = ofd_dev(d);
 234         struct dt_device        *dt_next = m->ofd_osd;
 235         struct lu_device        *next = &dt_next->dd_lu_dev;
 236         int                      rc;
 237
 238         ENTRY;
 239
 240         switch (cfg->lcfg_command) {
 241         case LCFG_PARAM: {
 242                 struct obd_device       *obd = ofd_obd(m);
 243                 /* For interoperability */
 244                 struct cfg_interop_param   *ptr = NULL;
 245                 struct lustre_cfg          *old_cfg = NULL;
 246                 char                       *param = NULL;
 247
 248                 param = lustre_cfg_string(cfg, 1);
 249                 if (param == NULL) {
 250                         CERROR("param is empty\n");
 251                         rc = -EINVAL;
 252                         break;
 253                 }
 254
 255                 ptr = class_find_old_param(param, ofd_interop_param);
 256                 if (ptr != NULL) {
 257                         if (ptr->new_param == NULL) {
 258                                 rc = 0;
 259                                 CWARN("For interoperability, skip this %s."
 260                                       " It is obsolete.\n", ptr->old_param);
 261                                 break;
 262                         }
 263
 264                         CWARN("Found old param %s, changed it to %s.\n",
 265                               ptr->old_param, ptr->new_param);
 266
 267                         old_cfg = cfg;
 268                         cfg = lustre_cfg_rename(old_cfg, ptr->new_param);
 269                         if (IS_ERR(cfg)) {
 270                                 rc = PTR_ERR(cfg);
 271                                 break;
 272                         }
 273                 }
 274
 275                 if (match_symlink_param(param)) {
 276                         rc = next->ld_ops->ldo_process_config(env, next, cfg);
 277                         break;
 278                 }
 279
 280                 rc = class_process_proc_seq_param(PARAM_OST, obd->obd_vars, cfg,
 281                                               d->ld_obd);
 282                 if (rc > 0 || rc == -ENOSYS) {
 283                         CDEBUG(D_CONFIG, "pass param %s down the stack.\n",
 284                                param);
 285                         /* we don't understand; pass it on */
 286                         rc = next->ld_ops->ldo_process_config(env, next, cfg);
 287                 }
 288                 break;
 289         }
 290         case LCFG_SPTLRPC_CONF: {
 291                 rc = -ENOTSUPP;
 292                 break;
 293         }
 294         default:
 295                 /* others are passed further */
 296                 rc = next->ld_ops->ldo_process_config(env, next, cfg);
 297                 break;
 298         }
 299         RETURN(rc);
 300 }
 301
 302 static int ofd_object_init(const struct lu_env *env, struct lu_object *o,
 303                            const struct lu_object_conf *conf)
 304 {
 305         struct ofd_device       *d = ofd_dev(o->lo_dev);
 306         struct lu_device        *under;
 307         struct lu_object        *below;
 308         int                      rc = 0;
 309
 310         ENTRY;
 311
 312         CDEBUG(D_INFO, "object init, fid = "DFID"\n",
 313                PFID(lu_object_fid(o)));
 314
 315         under = &d->ofd_osd->dd_lu_dev;
 316         below = under->ld_ops->ldo_object_alloc(env, o->lo_header, under);
 317         if (below != NULL)
 318                 lu_object_add(o, below);
 319         else
 320                 rc = -ENOMEM;
 321
 322         RETURN(rc);
 323 }
 324
 325 static void ofd_object_free(const struct lu_env *env, struct lu_object *o)
 326 {
 327         struct ofd_object       *of = ofd_obj(o);
 328         struct lu_object_header *h;
 329
 330         ENTRY;
 331
 332         h = o->lo_header;
 333         CDEBUG(D_INFO, "object free, fid = "DFID"\n",
 334                PFID(lu_object_fid(o)));
 335
 336         lu_object_fini(o);
 337         lu_object_header_fini(h);
 338         OBD_SLAB_FREE_PTR(of, ofd_object_kmem);
 339         EXIT;
 340 }
 341
 342 static int ofd_object_print(const struct lu_env *env, void *cookie,
 343                             lu_printer_t p, const struct lu_object *o)
 344 {
 345         return (*p)(env, cookie, LUSTRE_OST_NAME"-object@%p", o);
 346 }
 347
 348 struct lu_object_operations ofd_obj_ops = {
 349         .loo_object_init        = ofd_object_init,
 350         .loo_object_free        = ofd_object_free,
 351         .loo_object_print       = ofd_object_print
 352 };
 353
 354 static struct lu_object *ofd_object_alloc(const struct lu_env *env,
 355                                           const struct lu_object_header *hdr,
 356                                           struct lu_device *d)
 357 {
 358         struct ofd_object *of;
 359
 360         ENTRY;
 361
 362         OBD_SLAB_ALLOC_PTR_GFP(of, ofd_object_kmem, GFP_NOFS);
 363         if (of != NULL) {
 364                 struct lu_object        *o;
 365                 struct lu_object_header *h;
 366
 367                 o = &of->ofo_obj.do_lu;
 368                 h = &of->ofo_header;
 369                 lu_object_header_init(h);
 370                 lu_object_init(o, h, d);
 371                 lu_object_add_top(h, o);
 372                 o->lo_ops = &ofd_obj_ops;
 373                 RETURN(o);
 374         } else {
 375                 RETURN(NULL);
 376         }
 377 }
 378
 379 extern int ost_handle(struct ptlrpc_request *req);
 380
 381 static int ofd_lfsck_out_notify(const struct lu_env *env, void *data,
 382                                 enum lfsck_events event)
 383 {
 384         struct ofd_device *ofd = data;
 385         struct obd_device *obd = ofd_obd(ofd);
 386
 387         switch (event) {
 388         case LE_LASTID_REBUILDING:
 389                 CWARN("%s: Found crashed LAST_ID, deny creating new OST-object "
 390                       "on the device until the LAST_ID rebuilt successfully.\n",
 391                       obd->obd_name);
 392                 down_write(&ofd->ofd_lastid_rwsem);
 393                 ofd->ofd_lastid_rebuilding = 1;
 394                 up_write(&ofd->ofd_lastid_rwsem);
 395                 break;
 396         case LE_LASTID_REBUILT: {
 397                 down_write(&ofd->ofd_lastid_rwsem);
 398                 ofd_seqs_free(env, ofd);
 399                 ofd->ofd_lastid_rebuilding = 0;
 400                 ofd->ofd_lastid_gen++;
 401                 up_write(&ofd->ofd_lastid_rwsem);
 402                 break;
 403         }
 404         default:
 405                 CERROR("%s: unknown lfsck event: rc = %d\n",
 406                        ofd_name(ofd), event);
 407                 return -EINVAL;
 408         }
 409
 410         return 0;
 411 }
 412
 413 static int ofd_prepare(const struct lu_env *env, struct lu_device *pdev,
 414                        struct lu_device *dev)
 415 {
 416         struct ofd_thread_info          *info;
 417         struct ofd_device               *ofd = ofd_dev(dev);
 418         struct obd_device               *obd = ofd_obd(ofd);
 419         struct lu_device                *next = &ofd->ofd_osd->dd_lu_dev;
 420         int                              rc;
 421
 422         ENTRY;
 423
 424         info = ofd_info_init(env, NULL);
 425         if (info == NULL)
 426                 RETURN(-EFAULT);
 427
 428         /* initialize lower device */
 429         rc = next->ld_ops->ldo_prepare(env, dev, next);
 430         if (rc != 0)
 431                 RETURN(rc);
 432
 433         rc = lfsck_register(env, ofd->ofd_osd, ofd->ofd_osd, obd,
 434                             ofd_lfsck_out_notify, ofd, false);
 435         if (rc != 0) {
 436                 CERROR("%s: failed to initialize lfsck: rc = %d\n",
 437                        obd->obd_name, rc);
 438                 RETURN(rc);
 439         }
 440
 441         rc = lfsck_register_namespace(env, ofd->ofd_osd, ofd->ofd_namespace);
 442         /* The LFSCK instance is registered just now, so it must be there when
 443          * register the namespace to such instance. */
 444         LASSERTF(rc == 0, "register namespace failed: rc = %d\n", rc);
 445
 446         target_recovery_init(&ofd->ofd_lut, tgt_request_handle);
 447         LASSERT(obd->obd_no_conn);
 448         spin_lock(&obd->obd_dev_lock);
 449         obd->obd_no_conn = 0;
 450         spin_unlock(&obd->obd_dev_lock);
 451
 452         if (obd->obd_recovering == 0)
 453                 ofd_postrecov(env, ofd);
 454
 455         RETURN(rc);
 456 }
 457
 458 static int ofd_recovery_complete(const struct lu_env *env,
 459                                  struct lu_device *dev)
 460 {
 461         struct ofd_device       *ofd = ofd_dev(dev);
 462         struct lu_device        *next = &ofd->ofd_osd->dd_lu_dev;
 463         int                      rc = 0, max_precreate;
 464
 465         ENTRY;
 466
 467         /* Grant space for object precreation on the self export.
 468          * This initial reserved space (i.e. 10MB for zfs and 280KB for ldiskfs)
 469          * is enough to create 10k objects. More space is then acquired for
 470          * precreation in ofd_grant_create().
 471          */
 472         max_precreate = OST_MAX_PRECREATE * ofd->ofd_dt_conf.ddp_inodespace / 2;
 473         ofd_grant_connect(env, dev->ld_obd->obd_self_export, max_precreate,
 474                           false);
 475         rc = next->ld_ops->ldo_recovery_complete(env, next);
 476         RETURN(rc);
 477 }
 478
 479 static struct lu_device_operations ofd_lu_ops = {
 480         .ldo_object_alloc       = ofd_object_alloc,
 481         .ldo_process_config     = ofd_process_config,
 482         .ldo_recovery_complete  = ofd_recovery_complete,
 483         .ldo_prepare            = ofd_prepare,
 484 };
 485
 486 LPROC_SEQ_FOPS(lprocfs_nid_stats_clear);
 487
 488 static int ofd_procfs_init(struct ofd_device *ofd)
 489 {
 490         struct obd_device               *obd = ofd_obd(ofd);
 491         cfs_proc_dir_entry_t            *entry;
 492         int                              rc = 0;
 493
 494         ENTRY;
 495
 496         /* lprocfs must be setup before the ofd so state can be safely added
 497          * to /proc incrementally as the ofd is setup */
 498         obd->obd_vars = lprocfs_ofd_obd_vars;
 499         rc = lprocfs_seq_obd_setup(obd);
 500         if (rc) {
 501                 CERROR("%s: lprocfs_obd_setup failed: %d.\n",
 502                        obd->obd_name, rc);
 503                 RETURN(rc);
 504         }
 505
 506         rc = lprocfs_alloc_obd_stats(obd, LPROC_OFD_STATS_LAST);
 507         if (rc) {
 508                 CERROR("%s: lprocfs_alloc_obd_stats failed: %d.\n",
 509                        obd->obd_name, rc);
 510                 GOTO(obd_cleanup, rc);
 511         }
 512
 513         obd->obd_uses_nid_stats = 1;
 514
 515         entry = lprocfs_seq_register("exports", obd->obd_proc_entry, NULL,
 516                                      NULL);
 517         if (IS_ERR(entry)) {
 518                 rc = PTR_ERR(entry);
 519                 CERROR("%s: error %d setting up lprocfs for %s\n",
 520                        obd->obd_name, rc, "exports");
 521                 GOTO(obd_cleanup, rc);
 522         }
 523         obd->obd_proc_exports_entry = entry;
 524
 525         entry = lprocfs_add_simple(obd->obd_proc_exports_entry, "clear",
 526 #ifndef HAVE_ONLY_PROCFS_SEQ
 527                                    NULL, NULL,
 528 #endif
 529                                    obd, &lprocfs_nid_stats_clear_fops);
 530         if (IS_ERR(entry)) {
 531                 rc = PTR_ERR(entry);
 532                 CERROR("%s: add proc entry 'clear' failed: %d.\n",
 533                        obd->obd_name, rc);
 534                 GOTO(obd_cleanup, rc);
 535         }
 536
 537         ofd_stats_counter_init(obd->obd_stats);
 538
 539         rc = lprocfs_job_stats_init(obd, LPROC_OFD_STATS_LAST,
 540                                     ofd_stats_counter_init);
 541         if (rc)
 542                 GOTO(obd_cleanup, rc);
 543         RETURN(0);
 544 obd_cleanup:
 545         lprocfs_obd_cleanup(obd);
 546         lprocfs_free_obd_stats(obd);
 547
 548         return rc;
 549 }
 550
 551 /**
 552  * ofd_procfs_add_brw_stats_symlink - expose osd stats to ofd layer
 553  *
 554  * The osd interfaces to the backend file system exposes useful data
 555  * such as brw_stats and read or write cache states. This same data
 556  * needs to be exposed into the obdfilter (ofd) layer to maintain
 557  * backwards compatibility. This function creates the symlinks in the
 558  * proc layer to enable this.
 559  */
 560 static void ofd_procfs_add_brw_stats_symlink(struct ofd_device *ofd)
 561 {
 562         struct obd_device       *obd = ofd_obd(ofd);
 563         struct obd_device       *osd_obd = ofd->ofd_osd_exp->exp_obd;
 564
 565         if (obd->obd_proc_entry == NULL)
 566                 return;
 567
 568         lprocfs_add_symlink("brw_stats", obd->obd_proc_entry,
 569                             "../../%s/%s/brw_stats",
 570                             osd_obd->obd_type->typ_name, obd->obd_name);
 571
 572         lprocfs_add_symlink("read_cache_enable", obd->obd_proc_entry,
 573                             "../../%s/%s/read_cache_enable",
 574                             osd_obd->obd_type->typ_name, obd->obd_name);
 575
 576         lprocfs_add_symlink("readcache_max_filesize",
 577                             obd->obd_proc_entry,
 578                             "../../%s/%s/readcache_max_filesize",
 579                             osd_obd->obd_type->typ_name, obd->obd_name);
 580
 581         lprocfs_add_symlink("writethrough_cache_enable",
 582                             obd->obd_proc_entry,
 583                             "../../%s/%s/writethrough_cache_enable",
 584                             osd_obd->obd_type->typ_name, obd->obd_name);
 585 }
 586
 587 static void ofd_procfs_fini(struct ofd_device *ofd)
 588 {
 589         struct obd_device *obd = ofd_obd(ofd);
 590
 591         lprocfs_free_per_client_stats(obd);
 592         lprocfs_obd_cleanup(obd);
 593         lprocfs_free_obd_stats(obd);
 594         lprocfs_job_stats_fini(obd);
 595 }
 596
 597 extern int ost_handle(struct ptlrpc_request *req);
 598
 599 int ofd_fid_fini(const struct lu_env *env, struct ofd_device *ofd)
 600 {
 601         return seq_site_fini(env, &ofd->ofd_seq_site);
 602 }
 603
 604 int ofd_fid_init(const struct lu_env *env, struct ofd_device *ofd)
 605 {
 606         struct seq_server_site  *ss = &ofd->ofd_seq_site;
 607         struct lu_device        *lu = &ofd->ofd_dt_dev.dd_lu_dev;
 608         char                    *obd_name = ofd_name(ofd);
 609         char                    *name = NULL;
 610         int                     rc = 0;
 611
 612         ss = &ofd->ofd_seq_site;
 613         lu->ld_site->ld_seq_site = ss;
 614         ss->ss_lu = lu->ld_site;
 615         ss->ss_node_id = ofd->ofd_lut.lut_lsd.lsd_osd_index;
 616
 617         OBD_ALLOC_PTR(ss->ss_server_seq);
 618         if (ss->ss_server_seq == NULL)
 619                 GOTO(out_free, rc = -ENOMEM);
 620
 621         OBD_ALLOC(name, strlen(obd_name) + 10);
 622         if (!name) {
 623                 OBD_FREE_PTR(ss->ss_server_seq);
 624                 ss->ss_server_seq = NULL;
 625                 GOTO(out_free, rc = -ENOMEM);
 626         }
 627
 628         rc = seq_server_init(env, ss->ss_server_seq, ofd->ofd_osd, obd_name,
 629                              LUSTRE_SEQ_SERVER, ss);
 630         if (rc) {
 631                 CERROR("%s : seq server init error %d\n", obd_name, rc);
 632                 GOTO(out_free, rc);
 633         }
 634         ss->ss_server_seq->lss_space.lsr_index = ss->ss_node_id;
 635
 636         OBD_ALLOC_PTR(ss->ss_client_seq);
 637         if (ss->ss_client_seq == NULL)
 638                 GOTO(out_free, rc = -ENOMEM);
 639
 640         snprintf(name, strlen(obd_name) + 6, "%p-super", obd_name);
 641         rc = seq_client_init(ss->ss_client_seq, NULL, LUSTRE_SEQ_DATA,
 642                              name, NULL);
 643         if (rc) {
 644                 CERROR("%s : seq client init error %d\n", obd_name, rc);
 645                 GOTO(out_free, rc);
 646         }
 647         OBD_FREE(name, strlen(obd_name) + 10);
 648         name = NULL;
 649
 650         rc = seq_server_set_cli(env, ss->ss_server_seq, ss->ss_client_seq);
 651
 652 out_free:
 653         if (rc) {
 654                 if (ss->ss_server_seq) {
 655                         seq_server_fini(ss->ss_server_seq, env);
 656                         OBD_FREE_PTR(ss->ss_server_seq);
 657                         ss->ss_server_seq = NULL;
 658                 }
 659
 660                 if (ss->ss_client_seq) {
 661                         seq_client_fini(ss->ss_client_seq);
 662                         OBD_FREE_PTR(ss->ss_client_seq);
 663                         ss->ss_client_seq = NULL;
 664                 }
 665
 666                 if (name) {
 667                         OBD_FREE(name, strlen(obd_name) + 10);
 668                         name = NULL;
 669                 }
 670         }
 671
 672         return rc;
 673 }
 674
 675 int ofd_set_info_hdl(struct tgt_session_info *tsi)
 676 {
 677         struct ptlrpc_request   *req = tgt_ses_req(tsi);
 678         struct ost_body         *body = NULL, *repbody;
 679         void                    *key, *val = NULL;
 680         int                      keylen, vallen, rc = 0;
 681         bool                     is_grant_shrink;
 682         struct ofd_device       *ofd = ofd_exp(tsi->tsi_exp);
 683
 684         ENTRY;
 685
 686         key = req_capsule_client_get(tsi->tsi_pill, &RMF_SETINFO_KEY);
 687         if (key == NULL) {
 688                 DEBUG_REQ(D_HA, req, "no set_info key");
 689                 RETURN(err_serious(-EFAULT));
 690         }
 691         keylen = req_capsule_get_size(tsi->tsi_pill, &RMF_SETINFO_KEY,
 692                                       RCL_CLIENT);
 693
 694         val = req_capsule_client_get(tsi->tsi_pill, &RMF_SETINFO_VAL);
 695         if (val == NULL) {
 696                 DEBUG_REQ(D_HA, req, "no set_info val");
 697                 RETURN(err_serious(-EFAULT));
 698         }
 699         vallen = req_capsule_get_size(tsi->tsi_pill, &RMF_SETINFO_VAL,
 700                                       RCL_CLIENT);
 701
 702         is_grant_shrink = KEY_IS(KEY_GRANT_SHRINK);
 703         if (is_grant_shrink)
 704                 /* In this case the value is actually an RMF_OST_BODY, so we
 705                  * transmutate the type of this PTLRPC */
 706                 req_capsule_extend(tsi->tsi_pill, &RQF_OST_SET_GRANT_INFO);
 707
 708         rc = req_capsule_server_pack(tsi->tsi_pill);
 709         if (rc < 0)
 710                 RETURN(rc);
 711
 712         if (is_grant_shrink) {
 713                 body = req_capsule_client_get(tsi->tsi_pill, &RMF_OST_BODY);
 714
 715                 repbody = req_capsule_server_get(tsi->tsi_pill, &RMF_OST_BODY);
 716                 *repbody = *body;
 717
 718                 /** handle grant shrink, similar to a read request */
 719                 ofd_grant_prepare_read(tsi->tsi_env, tsi->tsi_exp,
 720                                        &repbody->oa);
 721         } else if (KEY_IS(KEY_EVICT_BY_NID)) {
 722                 if (vallen > 0)
 723                         obd_export_evict_by_nid(tsi->tsi_exp->exp_obd, val);
 724                 rc = 0;
 725         } else if (KEY_IS(KEY_CAPA_KEY)) {
 726                 rc = ofd_update_capa_key(ofd, val);
 727         } else if (KEY_IS(KEY_SPTLRPC_CONF)) {
 728                 rc = tgt_adapt_sptlrpc_conf(tsi->tsi_tgt, 0);
 729         } else {
 730                 CERROR("%s: Unsupported key %s\n",
 731                        tgt_name(tsi->tsi_tgt), (char *)key);
 732                 rc = -EOPNOTSUPP;
 733         }
 734         ofd_counter_incr(tsi->tsi_exp, LPROC_OFD_STATS_SET_INFO,
 735                          tsi->tsi_jobid, 1);
 736
 737         RETURN(rc);
 738 }
 739
 740 int ofd_fiemap_get(const struct lu_env *env, struct ofd_device *ofd,
 741                    struct lu_fid *fid, struct ll_user_fiemap *fiemap)
 742 {
 743         struct ofd_object       *fo;
 744         int                      rc;
 745
 746         fo = ofd_object_find(env, ofd, fid);
 747         if (IS_ERR(fo)) {
 748                 CERROR("%s: error finding object "DFID"\n",
 749                        ofd_name(ofd), PFID(fid));
 750                 return PTR_ERR(fo);
 751         }
 752
 753         ofd_read_lock(env, fo);
 754         if (ofd_object_exists(fo))
 755                 rc = dt_fiemap_get(env, ofd_object_child(fo), fiemap);
 756         else
 757                 rc = -ENOENT;
 758         ofd_read_unlock(env, fo);
 759         ofd_object_put(env, fo);
 760         return rc;
 761 }
 762
 763 struct locked_region {
 764         cfs_list_t              list;
 765         struct lustre_handle    lh;
 766 };
 767
 768 static int lock_region(struct ldlm_namespace *ns, struct ldlm_res_id *res_id,
 769                        unsigned long long begin, unsigned long long end,
 770                        cfs_list_t *locked)
 771 {
 772         struct locked_region    *region = NULL;
 773         __u64                    flags = 0;
 774         int                      rc;
 775
 776         LASSERT(begin <= end);
 777         OBD_ALLOC_PTR(region);
 778         if (region == NULL)
 779                 return -ENOMEM;
 780
 781         rc = tgt_extent_lock(ns, res_id, begin, end, &region->lh,
 782                              LCK_PR, &flags);
 783         if (rc != 0)
 784                 return rc;
 785
 786         CDEBUG(D_OTHER, "ost lock [%llu,%llu], lh=%p\n", begin, end,
 787                &region->lh);
 788         cfs_list_add(&region->list, locked);
 789
 790         return 0;
 791 }
 792
 793 static int lock_zero_regions(struct ldlm_namespace *ns,
 794                              struct ldlm_res_id *res_id,
 795                              struct ll_user_fiemap *fiemap,
 796                              cfs_list_t *locked)
 797 {
 798         __u64 begin = fiemap->fm_start;
 799         unsigned int i;
 800         int rc = 0;
 801         struct ll_fiemap_extent *fiemap_start = fiemap->fm_extents;
 802
 803         ENTRY;
 804
 805         CDEBUG(D_OTHER, "extents count %u\n", fiemap->fm_mapped_extents);
 806         for (i = 0; i < fiemap->fm_mapped_extents; i++) {
 807                 if (fiemap_start[i].fe_logical > begin) {
 808                         CDEBUG(D_OTHER, "ost lock [%llu,%llu]\n",
 809                                begin, fiemap_start[i].fe_logical);
 810                         rc = lock_region(ns, res_id, begin,
 811                                          fiemap_start[i].fe_logical, locked);
 812                         if (rc)
 813                                 RETURN(rc);
 814                 }
 815
 816                 begin = fiemap_start[i].fe_logical + fiemap_start[i].fe_length;
 817         }
 818
 819         if (begin < (fiemap->fm_start + fiemap->fm_length)) {
 820                 CDEBUG(D_OTHER, "ost lock [%llu,%llu]\n",
 821                        begin, fiemap->fm_start + fiemap->fm_length);
 822                 rc = lock_region(ns, res_id, begin,
 823                                  fiemap->fm_start + fiemap->fm_length, locked);
 824         }
 825
 826         RETURN(rc);
 827 }
 828
 829 static void unlock_zero_regions(struct ldlm_namespace *ns, cfs_list_t *locked)
 830 {
 831         struct locked_region *entry, *temp;
 832
 833         cfs_list_for_each_entry_safe(entry, temp, locked, list) {
 834                 CDEBUG(D_OTHER, "ost unlock lh=%p\n", &entry->lh);
 835                 tgt_extent_unlock(&entry->lh, LCK_PR);
 836                 cfs_list_del(&entry->list);
 837                 OBD_FREE_PTR(entry);
 838         }
 839 }
 840
 841 int ofd_get_info_hdl(struct tgt_session_info *tsi)
 842 {
 843         struct obd_export               *exp = tsi->tsi_exp;
 844         struct ofd_device               *ofd = ofd_exp(exp);
 845         struct ofd_thread_info          *fti = tsi2ofd_info(tsi);
 846         void                            *key;
 847         int                              keylen;
 848         int                              replylen, rc = 0;
 849
 850         ENTRY;
 851
 852         /* this common part for get_info rpc */
 853         key = req_capsule_client_get(tsi->tsi_pill, &RMF_GETINFO_KEY);
 854         if (key == NULL) {
 855                 DEBUG_REQ(D_HA, tgt_ses_req(tsi), "no get_info key");
 856                 RETURN(err_serious(-EPROTO));
 857         }
 858         keylen = req_capsule_get_size(tsi->tsi_pill, &RMF_GETINFO_KEY,
 859                                       RCL_CLIENT);
 860
 861         if (KEY_IS(KEY_LAST_ID)) {
 862                 obd_id          *last_id;
 863                 struct ofd_seq  *oseq;
 864
 865                 req_capsule_extend(tsi->tsi_pill, &RQF_OST_GET_INFO_LAST_ID);
 866                 rc = req_capsule_server_pack(tsi->tsi_pill);
 867                 if (rc)
 868                         RETURN(err_serious(rc));
 869
 870                 last_id = req_capsule_server_get(tsi->tsi_pill, &RMF_OBD_ID);
 871
 872                 oseq = ofd_seq_load(tsi->tsi_env, ofd,
 873                                     (obd_seq)exp->exp_filter_data.fed_group);
 874                 if (IS_ERR(oseq))
 875                         rc = -EFAULT;
 876                 else
 877                         *last_id = ofd_seq_last_oid(oseq);
 878                 ofd_seq_put(tsi->tsi_env, oseq);
 879         } else if (KEY_IS(KEY_FIEMAP)) {
 880                 struct ll_fiemap_info_key       *fm_key;
 881                 struct ll_user_fiemap           *fiemap;
 882                 struct lu_fid                   *fid;
 883
 884                 req_capsule_extend(tsi->tsi_pill, &RQF_OST_GET_INFO_FIEMAP);
 885
 886                 fm_key = req_capsule_client_get(tsi->tsi_pill, &RMF_FIEMAP_KEY);
 887                 rc = tgt_validate_obdo(tsi, &fm_key->oa);
 888                 if (rc)
 889                         RETURN(err_serious(rc));
 890
 891                 fid = &fm_key->oa.o_oi.oi_fid;
 892
 893                 CDEBUG(D_INODE, "get FIEMAP of object "DFID"\n", PFID(fid));
 894
 895                 replylen = fiemap_count_to_size(fm_key->fiemap.fm_extent_count);
 896                 req_capsule_set_size(tsi->tsi_pill, &RMF_FIEMAP_VAL,
 897                                      RCL_SERVER, replylen);
 898
 899                 rc = req_capsule_server_pack(tsi->tsi_pill);
 900                 if (rc)
 901                         RETURN(err_serious(rc));
 902
 903                 fiemap = req_capsule_server_get(tsi->tsi_pill, &RMF_FIEMAP_VAL);
 904                 if (fiemap == NULL)
 905                         RETURN(-ENOMEM);
 906
 907                 *fiemap = fm_key->fiemap;
 908                 rc = ofd_fiemap_get(tsi->tsi_env, ofd, fid, fiemap);
 909
 910                 /* LU-3219: Lock the sparse areas to make sure dirty
 911                  * flushed back from client, then call fiemap again. */
 912                 if (fm_key->oa.o_valid & OBD_MD_FLFLAGS &&
 913                     fm_key->oa.o_flags & OBD_FL_SRVLOCK) {
 914                         cfs_list_t locked = CFS_LIST_HEAD_INIT(locked);
 915
 916                         ost_fid_build_resid(fid, &fti->fti_resid);
 917                         rc = lock_zero_regions(ofd->ofd_namespace,
 918                                                &fti->fti_resid, fiemap,
 919                                                &locked);
 920                         if (rc == 0 && !cfs_list_empty(&locked)) {
 921                                 rc = ofd_fiemap_get(tsi->tsi_env, ofd, fid,
 922                                                     fiemap);
 923                                 unlock_zero_regions(ofd->ofd_namespace,
 924                                                     &locked);
 925                         }
 926                 }
 927         } else if (KEY_IS(KEY_LAST_FID)) {
 928                 struct ofd_device       *ofd = ofd_exp(exp);
 929                 struct ofd_seq          *oseq;
 930                 struct lu_fid           *fid;
 931                 int                      rc;
 932
 933                 req_capsule_extend(tsi->tsi_pill, &RQF_OST_GET_INFO_LAST_FID);
 934                 rc = req_capsule_server_pack(tsi->tsi_pill);
 935                 if (rc)
 936                         RETURN(err_serious(rc));
 937
 938                 fid = req_capsule_client_get(tsi->tsi_pill, &RMF_FID);
 939                 if (fid == NULL)
 940                         RETURN(err_serious(-EPROTO));
 941
 942                 fid_le_to_cpu(&fti->fti_ostid.oi_fid, fid);
 943
 944                 fid = req_capsule_server_get(tsi->tsi_pill, &RMF_FID);
 945                 if (fid == NULL)
 946                         RETURN(-ENOMEM);
 947
 948                 oseq = ofd_seq_load(tsi->tsi_env, ofd,
 949                                     ostid_seq(&fti->fti_ostid));
 950                 if (IS_ERR(oseq))
 951                         RETURN(PTR_ERR(oseq));
 952
 953                 rc = ostid_to_fid(fid, &oseq->os_oi,
 954                                   ofd->ofd_lut.lut_lsd.lsd_osd_index);
 955                 if (rc != 0)
 956                         GOTO(out_put, rc);
 957
 958                 CDEBUG(D_HA, "%s: LAST FID is "DFID"\n", ofd_name(ofd),
 959                        PFID(fid));
 960 out_put:
 961                 ofd_seq_put(tsi->tsi_env, oseq);
 962         } else {
 963                 CERROR("%s: not supported key %s\n", tgt_name(tsi->tsi_tgt),
 964                        (char *)key);
 965                 rc = -EOPNOTSUPP;
 966         }
 967         ofd_counter_incr(tsi->tsi_exp, LPROC_OFD_STATS_GET_INFO,
 968                          tsi->tsi_jobid, 1);
 969
 970         RETURN(rc);
 971 }
 972
 973 static int ofd_getattr_hdl(struct tgt_session_info *tsi)
 974 {
 975         struct ofd_thread_info  *fti = tsi2ofd_info(tsi);
 976         struct ofd_device       *ofd = ofd_exp(tsi->tsi_exp);
 977         struct ost_body         *repbody;
 978         struct lustre_handle     lh = { 0 };
 979         struct ofd_object       *fo;
 980         __u64                    flags = 0;
 981         ldlm_mode_t              lock_mode = LCK_PR;
 982         bool                     srvlock;
 983         int                      rc;
 984         ENTRY;
 985
 986         LASSERT(tsi->tsi_ost_body != NULL);
 987
 988         repbody = req_capsule_server_get(tsi->tsi_pill, &RMF_OST_BODY);
 989         if (repbody == NULL)
 990                 RETURN(-ENOMEM);
 991
 992         repbody->oa.o_oi = tsi->tsi_ost_body->oa.o_oi;
 993         repbody->oa.o_valid = OBD_MD_FLID | OBD_MD_FLGROUP;
 994
 995         srvlock = tsi->tsi_ost_body->oa.o_valid & OBD_MD_FLFLAGS &&
 996                   tsi->tsi_ost_body->oa.o_flags & OBD_FL_SRVLOCK;
 997
 998         if (srvlock) {
 999                 if (unlikely(tsi->tsi_ost_body->oa.o_flags & OBD_FL_FLUSH))
1000                         lock_mode = LCK_PW;
1001
1002                 rc = tgt_extent_lock(tsi->tsi_tgt->lut_obd->obd_namespace,
1003                                      &tsi->tsi_resid, 0, OBD_OBJECT_EOF, &lh,
1004                                      lock_mode, &flags);
1005                 if (rc != 0)
1006                         RETURN(rc);
1007         }
1008
1009         fo = ofd_object_find_exists(tsi->tsi_env, ofd, &tsi->tsi_fid);
1010         if (IS_ERR(fo))
1011                 GOTO(out, rc = PTR_ERR(fo));
1012
1013         rc = ofd_attr_get(tsi->tsi_env, fo, &fti->fti_attr);
1014         if (rc == 0) {
1015                 __u64    curr_version;
1016
1017                 obdo_from_la(&repbody->oa, &fti->fti_attr,
1018                              OFD_VALID_FLAGS | LA_UID | LA_GID);
1019                 tgt_drop_id(tsi->tsi_exp, &repbody->oa);
1020
1021                 /* Store object version in reply */
1022                 curr_version = dt_version_get(tsi->tsi_env,
1023                                               ofd_object_child(fo));
1024                 if ((__s64)curr_version != -EOPNOTSUPP) {
1025                         repbody->oa.o_valid |= OBD_MD_FLDATAVERSION;
1026                         repbody->oa.o_data_version = curr_version;
1027                 }
1028         }
1029
1030         ofd_object_put(tsi->tsi_env, fo);
1031 out:
1032         if (srvlock)
1033                 tgt_extent_unlock(&lh, lock_mode);
1034
1035         ofd_counter_incr(tsi->tsi_exp, LPROC_OFD_STATS_GETATTR,
1036                          tsi->tsi_jobid, 1);
1037
1038         repbody->oa.o_valid |= OBD_MD_FLFLAGS;
1039         repbody->oa.o_flags = OBD_FL_FLUSH;
1040
1041         RETURN(rc);
1042 }
1043
1044 static int ofd_setattr_hdl(struct tgt_session_info *tsi)
1045 {
1046         struct ofd_thread_info  *fti = tsi2ofd_info(tsi);
1047         struct ofd_device       *ofd = ofd_exp(tsi->tsi_exp);
1048         struct ost_body         *body = tsi->tsi_ost_body;
1049         struct ost_body         *repbody;
1050         struct ldlm_resource    *res;
1051         struct ofd_object       *fo;
1052         struct filter_fid       *ff = NULL;
1053         int                      rc = 0;
1054
1055         ENTRY;
1056
1057         LASSERT(body != NULL);
1058
1059         repbody = req_capsule_server_get(tsi->tsi_pill, &RMF_OST_BODY);
1060         if (repbody == NULL)
1061                 RETURN(-ENOMEM);
1062
1063         repbody->oa.o_oi = body->oa.o_oi;
1064         repbody->oa.o_valid = OBD_MD_FLID | OBD_MD_FLGROUP;
1065
1066         /* This would be very bad - accidentally truncating a file when
1067          * changing the time or similar - bug 12203. */
1068         if (body->oa.o_valid & OBD_MD_FLSIZE &&
1069             body->oa.o_size != OBD_OBJECT_EOF) {
1070                 static char mdsinum[48];
1071
1072                 if (body->oa.o_valid & OBD_MD_FLFID)
1073                         snprintf(mdsinum, sizeof(mdsinum) - 1,
1074                                  "of parent "DFID, body->oa.o_parent_seq,
1075                                  body->oa.o_parent_oid, 0);
1076                 else
1077                         mdsinum[0] = '\0';
1078
1079                 CERROR("%s: setattr from %s is trying to truncate object "DFID
1080                        " %s\n", ofd_name(ofd), obd_export_nid2str(tsi->tsi_exp),
1081                        PFID(&tsi->tsi_fid), mdsinum);
1082                 RETURN(-EPERM);
1083         }
1084
1085         fo = ofd_object_find_exists(tsi->tsi_env, ofd, &tsi->tsi_fid);
1086         if (IS_ERR(fo))
1087                 GOTO(out, rc = PTR_ERR(fo));
1088
1089         la_from_obdo(&fti->fti_attr, &body->oa, body->oa.o_valid);
1090         fti->fti_attr.la_valid &= ~LA_TYPE;
1091
1092         if (body->oa.o_valid & OBD_MD_FLFID) {
1093                 ff = &fti->fti_mds_fid;
1094                 ofd_prepare_fidea(ff, &body->oa);
1095         }
1096
1097         /* setting objects attributes (including owner/group) */
1098         rc = ofd_attr_set(tsi->tsi_env, fo, &fti->fti_attr, ff);
1099         if (rc != 0)
1100                 GOTO(out_put, rc);
1101
1102         obdo_from_la(&repbody->oa, &fti->fti_attr,
1103                      OFD_VALID_FLAGS | LA_UID | LA_GID);
1104         tgt_drop_id(tsi->tsi_exp, &repbody->oa);
1105
1106         ofd_counter_incr(tsi->tsi_exp, LPROC_OFD_STATS_SETATTR,
1107                          tsi->tsi_jobid, 1);
1108         EXIT;
1109 out_put:
1110         ofd_object_put(tsi->tsi_env, fo);
1111 out:
1112         if (rc == 0) {
1113                 /* we do not call this before to avoid lu_object_find() in
1114                  *  ->lvbo_update() holding another reference on the object.
1115                  * otherwise concurrent destroy can make the object unavailable
1116                  * for 2nd lu_object_find() waiting for the first reference
1117                  * to go... deadlock! */
1118                 res = ldlm_resource_get(ofd->ofd_namespace, NULL,
1119                                         &tsi->tsi_resid, LDLM_EXTENT, 0);
1120                 if (!IS_ERR(res)) {
1121                         ldlm_res_lvbo_update(res, NULL, 0);
1122                         ldlm_resource_putref(res);
1123                 }
1124         }
1125         return rc;
1126 }
1127
1128 static int ofd_orphans_destroy(const struct lu_env *env,
1129                                struct obd_export *exp,
1130                                struct ofd_device *ofd, struct obdo *oa)
1131 {
1132         struct ofd_thread_info  *info   = ofd_info(env);
1133         struct lu_fid           *fid    = &info->fti_fid;
1134         struct ost_id           *oi     = &oa->o_oi;
1135         struct ofd_seq          *oseq;
1136         obd_seq                  seq    = ostid_seq(oi);
1137         obd_id                   end_id = ostid_id(oi);
1138         obd_id                   last;
1139         obd_id                   oid;
1140         int                      skip_orphan;
1141         int                      rc     = 0;
1142
1143         ENTRY;
1144
1145         oseq = ofd_seq_get(ofd, seq);
1146         if (oseq == NULL) {
1147                 CERROR("%s: Can not find seq for "DOSTID"\n",
1148                        ofd_name(ofd), POSTID(oi));
1149                 RETURN(-EINVAL);
1150         }
1151
1152         *fid = oi->oi_fid;
1153         last = ofd_seq_last_oid(oseq);
1154         oid = last;
1155
1156         LASSERT(exp != NULL);
1157         skip_orphan = !!(exp_connect_flags(exp) & OBD_CONNECT_SKIP_ORPHAN);
1158
1159         if (OBD_FAIL_CHECK(OBD_FAIL_OST_NODESTROY))
1160                 goto done;
1161
1162         LCONSOLE(D_INFO, "%s: deleting orphan objects from "DOSTID
1163                  " to "DOSTID"\n", ofd_name(ofd), seq, end_id + 1, seq, last);
1164
1165         while (oid > end_id) {
1166                 rc = fid_set_id(fid, oid);
1167                 if (unlikely(rc != 0))
1168                         GOTO(out_put, rc);
1169
1170                 rc = ofd_destroy_by_fid(env, ofd, fid, 1);
1171                 if (rc != 0 && rc != -ENOENT && rc != -ESTALE &&
1172                     likely(rc != -EREMCHG && rc != -EINPROGRESS))
1173                         /* this is pretty fatal... */
1174                         CEMERG("%s: error destroying precreated id "
1175                                DFID": rc = %d\n",
1176                                ofd_name(ofd), PFID(fid), rc);
1177
1178                 oid--;
1179                 if (!skip_orphan) {
1180                         ofd_seq_last_oid_set(oseq, oid);
1181                         /* update last_id on disk periodically so that if we
1182                          * restart * we don't need to re-scan all of the just
1183                          * deleted objects. */
1184                         if ((oid & 511) == 0)
1185                                 ofd_seq_last_oid_write(env, ofd, oseq);
1186                 }
1187         }
1188
1189         CDEBUG(D_HA, "%s: after destroy: set last_id to "DOSTID"\n",
1190                ofd_name(ofd), seq, oid);
1191
1192 done:
1193         if (!skip_orphan) {
1194                 ofd_seq_last_oid_set(oseq, oid);
1195                 rc = ofd_seq_last_oid_write(env, ofd, oseq);
1196         } else {
1197                 /* don't reuse orphan object, return last used objid */
1198                 ostid_set_id(oi, last);
1199                 rc = 0;
1200         }
1201
1202         GOTO(out_put, rc);
1203
1204 out_put:
1205         ofd_seq_put(env, oseq);
1206         return rc;
1207 }
1208
1209 static int ofd_create_hdl(struct tgt_session_info *tsi)
1210 {
1211         struct ptlrpc_request   *req = tgt_ses_req(tsi);
1212         struct ost_body         *repbody;
1213         const struct obdo       *oa = &tsi->tsi_ost_body->oa;
1214         struct obdo             *rep_oa;
1215         struct obd_export       *exp = tsi->tsi_exp;
1216         struct ofd_device       *ofd = ofd_exp(exp);
1217         obd_seq                  seq = ostid_seq(&oa->o_oi);
1218         obd_id                   oid = ostid_id(&oa->o_oi);
1219         struct ofd_seq          *oseq;
1220         int                      rc = 0, diff;
1221         int                      sync_trans = 0;
1222
1223         ENTRY;
1224
1225         if (OBD_FAIL_CHECK(OBD_FAIL_OST_EROFS))
1226                 RETURN(-EROFS);
1227
1228         repbody = req_capsule_server_get(tsi->tsi_pill, &RMF_OST_BODY);
1229         if (repbody == NULL)
1230                 RETURN(-ENOMEM);
1231
1232         down_read(&ofd->ofd_lastid_rwsem);
1233         /* Currently, for safe, we do not distinguish which LAST_ID is broken,
1234          * we may do that in the future.
1235          * Return -ENOSPC until the LAST_ID rebuilt. */
1236         if (unlikely(ofd->ofd_lastid_rebuilding))
1237                 GOTO(out_sem, rc = -ENOSPC);
1238
1239         rep_oa = &repbody->oa;
1240         rep_oa->o_oi = oa->o_oi;
1241
1242         LASSERT(seq >= FID_SEQ_OST_MDT0);
1243         LASSERT(oa->o_valid & OBD_MD_FLGROUP);
1244
1245         CDEBUG(D_INFO, "ofd_create("DOSTID")\n", POSTID(&oa->o_oi));
1246
1247         oseq = ofd_seq_load(tsi->tsi_env, ofd, seq);
1248         if (IS_ERR(oseq)) {
1249                 CERROR("%s: Can't find FID Sequence "LPX64": rc = %ld\n",
1250                        ofd_name(ofd), seq, PTR_ERR(oseq));
1251                 GOTO(out_sem, rc = -EINVAL);
1252         }
1253
1254         if ((oa->o_valid & OBD_MD_FLFLAGS) &&
1255             (oa->o_flags & OBD_FL_RECREATE_OBJS)) {
1256                 if (!ofd_obd(ofd)->obd_recovering ||
1257                     oid > ofd_seq_last_oid(oseq)) {
1258                         CERROR("%s: recreate objid "DOSTID" > last id "LPU64
1259                                "\n", ofd_name(ofd), POSTID(&oa->o_oi),
1260                                ofd_seq_last_oid(oseq));
1261                         GOTO(out_nolock, rc = -EINVAL);
1262                 }
1263                 /* Do nothing here, we re-create objects during recovery
1264                  * upon write replay, see ofd_preprw_write() */
1265                 GOTO(out_nolock, rc = 0);
1266         }
1267         /* former ofd_handle_precreate */
1268         if ((oa->o_valid & OBD_MD_FLFLAGS) &&
1269             (oa->o_flags & OBD_FL_DELORPHAN)) {
1270                 exp->exp_filter_data.fed_lastid_gen = ofd->ofd_lastid_gen;
1271
1272                 /* destroy orphans */
1273                 if (lustre_msg_get_conn_cnt(tgt_ses_req(tsi)->rq_reqmsg) <
1274                     exp->exp_conn_cnt) {
1275                         CERROR("%s: dropping old orphan cleanup request\n",
1276                                ofd_name(ofd));
1277                         GOTO(out_nolock, rc = 0);
1278                 }
1279                 /* This causes inflight precreates to abort and drop lock */
1280                 oseq->os_destroys_in_progress = 1;
1281                 mutex_lock(&oseq->os_create_lock);
1282                 if (!oseq->os_destroys_in_progress) {
1283                         CERROR("%s:["LPU64"] destroys_in_progress already"
1284                                " cleared\n", ofd_name(ofd), seq);
1285                         ostid_set_id(&rep_oa->o_oi, ofd_seq_last_oid(oseq));
1286                         GOTO(out, rc = 0);
1287                 }
1288                 diff = oid - ofd_seq_last_oid(oseq);
1289                 CDEBUG(D_HA, "ofd_last_id() = "LPU64" -> diff = %d\n",
1290                         ofd_seq_last_oid(oseq), diff);
1291                 if (-diff > OST_MAX_PRECREATE) {
1292                         /* FIXME: should reset precreate_next_id on MDS */
1293                         rc = 0;
1294                 } else if (diff < 0) {
1295                         rc = ofd_orphans_destroy(tsi->tsi_env, exp,
1296                                                  ofd, rep_oa);
1297                         oseq->os_destroys_in_progress = 0;
1298                 } else {
1299                         /* XXX: Used by MDS for the first time! */
1300                         oseq->os_destroys_in_progress = 0;
1301                 }
1302         } else {
1303                 if (unlikely(exp->exp_filter_data.fed_lastid_gen !=
1304                              ofd->ofd_lastid_gen)) {
1305                         ofd_obd_disconnect(exp);
1306                         GOTO(out_nolock, rc = -ENOTCONN);
1307                 }
1308
1309                 mutex_lock(&oseq->os_create_lock);
1310                 if (lustre_msg_get_conn_cnt(tgt_ses_req(tsi)->rq_reqmsg) <
1311                     exp->exp_conn_cnt) {
1312                         CERROR("%s: dropping old precreate request\n",
1313                                ofd_name(ofd));
1314                         GOTO(out, rc = 0);
1315                 }
1316                 /* only precreate if seq is 0, IDIF or normal and also o_id
1317                  * must be specfied */
1318                 if ((!fid_seq_is_mdt(seq) && !fid_seq_is_norm(seq) &&
1319                      !fid_seq_is_idif(seq)) || oid == 0) {
1320                         diff = 1; /* shouldn't we create this right now? */
1321                 } else {
1322                         diff = oid - ofd_seq_last_oid(oseq);
1323                         /* Do sync create if the seq is about to used up */
1324                         if (fid_seq_is_idif(seq) || fid_seq_is_mdt0(seq)) {
1325                                 if (unlikely(oid >= IDIF_MAX_OID - 1))
1326                                         sync_trans = 1;
1327                         } else if (fid_seq_is_norm(seq)) {
1328                                 if (unlikely(oid >=
1329                                              LUSTRE_DATA_SEQ_MAX_WIDTH - 1))
1330                                         sync_trans = 1;
1331                         } else {
1332                                 CERROR("%s : invalid o_seq "DOSTID"\n",
1333                                        ofd_name(ofd), POSTID(&oa->o_oi));
1334                                 GOTO(out, rc = -EINVAL);
1335                         }
1336                 }
1337         }
1338         if (diff > 0) {
1339                 cfs_time_t       enough_time = cfs_time_shift(DISK_TIMEOUT);
1340                 obd_id           next_id;
1341                 int              created = 0;
1342                 int              count;
1343
1344                 if (!(oa->o_valid & OBD_MD_FLFLAGS) ||
1345                     !(oa->o_flags & OBD_FL_DELORPHAN)) {
1346                         /* don't enforce grant during orphan recovery */
1347                         rc = ofd_grant_create(tsi->tsi_env,
1348                                               ofd_obd(ofd)->obd_self_export,
1349                                               &diff);
1350                         if (rc) {
1351                                 CDEBUG(D_HA, "%s: failed to acquire grant "
1352                                        "space for precreate (%d): rc = %d\n",
1353                                        ofd_name(ofd), diff, rc);
1354                                 diff = 0;
1355                         }
1356                 }
1357
1358                 /* This can happen if a new OST is formatted and installed
1359                  * in place of an old one at the same index.  Instead of
1360                  * precreating potentially millions of deleted old objects
1361                  * (possibly filling the OST), only precreate the last batch.
1362                  * LFSCK will eventually clean up any orphans. LU-14 */
1363                 if (diff > 5 * OST_MAX_PRECREATE) {
1364                         diff = OST_MAX_PRECREATE / 2;
1365                         LCONSOLE_WARN("%s: precreate FID "DOSTID" is over %u "
1366                                       "larger than the LAST_ID "DOSTID", only "
1367                                       "precreating the last %u objects.\n",
1368                                       ofd_name(ofd), POSTID(&oa->o_oi),
1369                                       5 * OST_MAX_PRECREATE,
1370                                       POSTID(&oseq->os_oi), diff);
1371                         ofd_seq_last_oid_set(oseq, ostid_id(&oa->o_oi) - diff);
1372                 }
1373
1374                 while (diff > 0) {
1375                         next_id = ofd_seq_last_oid(oseq) + 1;
1376                         count = ofd_precreate_batch(ofd, diff);
1377
1378                         CDEBUG(D_HA, "%s: reserve %d objects in group "LPX64
1379                                " at "LPU64"\n", ofd_name(ofd),
1380                                count, seq, next_id);
1381
1382                         if (!(lustre_msg_get_flags(req->rq_reqmsg) & MSG_REPLAY)
1383                             && cfs_time_after(jiffies, enough_time)) {
1384                                 CDEBUG(D_HA, "%s: Slow creates, %d/%d objects"
1385                                       " created at a rate of %d/s\n",
1386                                       ofd_name(ofd), created, diff + created,
1387                                       created / DISK_TIMEOUT);
1388                                 break;
1389                         }
1390
1391                         rc = ofd_precreate_objects(tsi->tsi_env, ofd, next_id,
1392                                                    oseq, count, sync_trans);
1393                         if (rc > 0) {
1394                                 created += rc;
1395                                 diff -= rc;
1396                         } else if (rc < 0) {
1397                                 break;
1398                         }
1399                 }
1400
1401                 if (diff > 0 &&
1402                     lustre_msg_get_flags(req->rq_reqmsg) & MSG_REPLAY)
1403                         LCONSOLE_WARN("%s: can't create the same count of"
1404                                       " objects when replaying the request"
1405                                       " (diff is %d). see LU-4621\n",
1406                                       ofd_name(ofd), diff);
1407
1408                 if (created > 0)
1409                         /* some objects got created, we can return
1410                          * them, even if last creation failed */
1411                         rc = 0;
1412                 else
1413                         CERROR("%s: unable to precreate: rc = %d\n",
1414                                ofd_name(ofd), rc);
1415
1416                 if (!(oa->o_valid & OBD_MD_FLFLAGS) ||
1417                     !(oa->o_flags & OBD_FL_DELORPHAN))
1418                         ofd_grant_commit(tsi->tsi_env,
1419                                          ofd_obd(ofd)->obd_self_export, rc);
1420
1421                 ostid_set_id(&rep_oa->o_oi, ofd_seq_last_oid(oseq));
1422         }
1423         EXIT;
1424         ofd_counter_incr(exp, LPROC_OFD_STATS_CREATE,
1425                          tsi->tsi_jobid, 1);
1426 out:
1427         mutex_unlock(&oseq->os_create_lock);
1428 out_nolock:
1429         if (rc == 0) {
1430 #if LUSTRE_VERSION_CODE < OBD_OCD_VERSION(2, 8, 53, 0)
1431                 struct ofd_thread_info  *info = ofd_info(tsi->tsi_env);
1432                 struct lu_fid           *fid = &info->fti_fid;
1433
1434                 /* For compatible purpose, it needs to convert back to
1435                  * OST ID before put it on wire. */
1436                 *fid = rep_oa->o_oi.oi_fid;
1437                 fid_to_ostid(fid, &rep_oa->o_oi);
1438 #endif
1439                 rep_oa->o_valid |= OBD_MD_FLID | OBD_MD_FLGROUP;
1440         }
1441         ofd_seq_put(tsi->tsi_env, oseq);
1442
1443 out_sem:
1444         up_read(&ofd->ofd_lastid_rwsem);
1445         return rc;
1446 }
1447
1448 static int ofd_destroy_hdl(struct tgt_session_info *tsi)
1449 {
1450         const struct ost_body   *body = tsi->tsi_ost_body;
1451         struct ost_body         *repbody;
1452         struct ofd_device       *ofd = ofd_exp(tsi->tsi_exp);
1453         struct ofd_thread_info  *fti = tsi2ofd_info(tsi);
1454         struct lu_fid           *fid = &fti->fti_fid;
1455         obd_id                   oid;
1456         obd_count                count;
1457         int                      rc = 0;
1458
1459         ENTRY;
1460
1461         if (OBD_FAIL_CHECK(OBD_FAIL_OST_EROFS))
1462                 RETURN(-EROFS);
1463
1464         /* This is old case for clients before Lustre 2.4 */
1465         /* If there's a DLM request, cancel the locks mentioned in it */
1466         if (req_capsule_field_present(tsi->tsi_pill, &RMF_DLM_REQ,
1467                                       RCL_CLIENT)) {
1468                 struct ldlm_request *dlm;
1469
1470                 dlm = req_capsule_client_get(tsi->tsi_pill, &RMF_DLM_REQ);
1471                 if (dlm == NULL)
1472                         RETURN(-EFAULT);
1473                 ldlm_request_cancel(tgt_ses_req(tsi), dlm, 0);
1474         }
1475
1476         *fid = body->oa.o_oi.oi_fid;
1477         oid = ostid_id(&body->oa.o_oi);
1478         LASSERT(oid != 0);
1479
1480         repbody = req_capsule_server_get(tsi->tsi_pill, &RMF_OST_BODY);
1481
1482         /* check that o_misc makes sense */
1483         if (body->oa.o_valid & OBD_MD_FLOBJCOUNT)
1484                 count = body->oa.o_misc;
1485         else
1486                 count = 1; /* default case - single destroy */
1487
1488         CDEBUG(D_HA, "%s: Destroy object "DOSTID" count %d\n", ofd_name(ofd),
1489                POSTID(&body->oa.o_oi), count);
1490
1491         while (count > 0) {
1492                 int lrc;
1493
1494                 lrc = ofd_destroy_by_fid(tsi->tsi_env, ofd, fid, 0);
1495                 if (lrc == -ENOENT) {
1496                         CDEBUG(D_INODE,
1497                                "%s: destroying non-existent object "DFID"\n",
1498                                ofd_name(ofd), PFID(fid));
1499                         /* rewrite rc with -ENOENT only if it is 0 */
1500                         if (rc == 0)
1501                                 rc = lrc;
1502                 } else if (lrc != 0) {
1503                         CERROR("%s: error destroying object "DFID": %d\n",
1504                                ofd_name(ofd), PFID(fid), lrc);
1505                         rc = lrc;
1506                 }
1507
1508                 count--;
1509                 oid++;
1510                 lrc = fid_set_id(fid, oid);
1511                 if (unlikely(lrc != 0 && count > 0))
1512                         GOTO(out, rc = lrc);
1513         }
1514
1515         ofd_counter_incr(tsi->tsi_exp, LPROC_OFD_STATS_DESTROY,
1516                          tsi->tsi_jobid, 1);
1517
1518         GOTO(out, rc);
1519
1520 out:
1521         fid_to_ostid(fid, &repbody->oa.o_oi);
1522         return rc;
1523 }
1524
1525 static int ofd_statfs_hdl(struct tgt_session_info *tsi)
1526 {
1527         struct obd_statfs       *osfs;
1528         int                      rc;
1529
1530         ENTRY;
1531
1532         osfs = req_capsule_server_get(tsi->tsi_pill, &RMF_OBD_STATFS);
1533
1534         rc = ofd_statfs(tsi->tsi_env, tsi->tsi_exp, osfs,
1535                         cfs_time_shift_64(-OBD_STATFS_CACHE_SECONDS), 0);
1536         if (rc != 0)
1537                 CERROR("%s: statfs failed: rc = %d\n",
1538                        tgt_name(tsi->tsi_tgt), rc);
1539
1540         if (OBD_FAIL_CHECK(OBD_FAIL_OST_STATFS_EINPROGRESS))
1541                 rc = -EINPROGRESS;
1542
1543         ofd_counter_incr(tsi->tsi_exp, LPROC_OFD_STATS_STATFS,
1544                          tsi->tsi_jobid, 1);
1545
1546         RETURN(rc);
1547 }
1548
1549 static int ofd_sync_hdl(struct tgt_session_info *tsi)
1550 {
1551         struct ost_body         *body = tsi->tsi_ost_body;
1552         struct ost_body         *repbody;
1553         struct ofd_thread_info  *fti = tsi2ofd_info(tsi);
1554         struct ofd_device       *ofd = ofd_exp(tsi->tsi_exp);
1555         struct ofd_object       *fo = NULL;
1556         int                      rc = 0;
1557
1558         ENTRY;
1559
1560         repbody = req_capsule_server_get(tsi->tsi_pill, &RMF_OST_BODY);
1561
1562         /* if no objid is specified, it means "sync whole filesystem" */
1563         if (!fid_is_zero(&tsi->tsi_fid)) {
1564                 fo = ofd_object_find_exists(tsi->tsi_env, ofd, &tsi->tsi_fid);
1565                 if (IS_ERR(fo))
1566                         RETURN(PTR_ERR(fo));
1567         }
1568
1569         rc = tgt_sync(tsi->tsi_env, tsi->tsi_tgt,
1570                       fo != NULL ? ofd_object_child(fo) : NULL,
1571                       repbody->oa.o_size, repbody->oa.o_blocks);
1572         if (rc)
1573                 GOTO(put, rc);
1574
1575         ofd_counter_incr(tsi->tsi_exp, LPROC_OFD_STATS_SYNC,
1576                          tsi->tsi_jobid, 1);
1577         if (fo == NULL)
1578                 RETURN(0);
1579
1580         repbody->oa.o_oi = body->oa.o_oi;
1581         repbody->oa.o_valid = OBD_MD_FLID | OBD_MD_FLGROUP;
1582
1583         rc = ofd_attr_get(tsi->tsi_env, fo, &fti->fti_attr);
1584         if (rc == 0)
1585                 obdo_from_la(&repbody->oa, &fti->fti_attr,
1586                              OFD_VALID_FLAGS);
1587         else
1588                 /* don't return rc from getattr */
1589                 rc = 0;
1590         EXIT;
1591 put:
1592         if (fo != NULL)
1593                 ofd_object_put(tsi->tsi_env, fo);
1594         return rc;
1595 }
1596
1597 static int ofd_punch_hdl(struct tgt_session_info *tsi)
1598 {
1599         const struct obdo       *oa = &tsi->tsi_ost_body->oa;
1600         struct ost_body         *repbody;
1601         struct ofd_thread_info  *info = tsi2ofd_info(tsi);
1602         struct ldlm_namespace   *ns = tsi->tsi_tgt->lut_obd->obd_namespace;
1603         struct ldlm_resource    *res;
1604         struct ofd_object       *fo;
1605         struct filter_fid       *ff = NULL;
1606         __u64                    flags = 0;
1607         struct lustre_handle     lh = { 0, };
1608         int                      rc;
1609         __u64                    start, end;
1610         bool                     srvlock;
1611
1612         ENTRY;
1613
1614         /* check that we do support OBD_CONNECT_TRUNCLOCK. */
1615         CLASSERT(OST_CONNECT_SUPPORTED & OBD_CONNECT_TRUNCLOCK);
1616
1617         if ((oa->o_valid & (OBD_MD_FLSIZE | OBD_MD_FLBLOCKS)) !=
1618             (OBD_MD_FLSIZE | OBD_MD_FLBLOCKS))
1619                 RETURN(err_serious(-EPROTO));
1620
1621         repbody = req_capsule_server_get(tsi->tsi_pill, &RMF_OST_BODY);
1622         if (repbody == NULL)
1623                 RETURN(err_serious(-ENOMEM));
1624
1625         /* punch start,end are passed in o_size,o_blocks throught wire */
1626         start = oa->o_size;
1627         end = oa->o_blocks;
1628
1629         if (end != OBD_OBJECT_EOF) /* Only truncate is supported */
1630                 RETURN(-EPROTO);
1631
1632         /* standard truncate optimization: if file body is completely
1633          * destroyed, don't send data back to the server. */
1634         if (start == 0)
1635                 flags |= LDLM_FL_AST_DISCARD_DATA;
1636
1637         repbody->oa.o_oi = oa->o_oi;
1638         repbody->oa.o_valid = OBD_MD_FLID;
1639
1640         srvlock = oa->o_valid & OBD_MD_FLFLAGS &&
1641                   oa->o_flags & OBD_FL_SRVLOCK;
1642
1643         if (srvlock) {
1644                 rc = tgt_extent_lock(ns, &tsi->tsi_resid, start, end, &lh,
1645                                      LCK_PW, &flags);
1646                 if (rc != 0)
1647                         RETURN(rc);
1648         }
1649
1650         CDEBUG(D_INODE, "calling punch for object "DFID", valid = "LPX64
1651                ", start = "LPD64", end = "LPD64"\n", PFID(&tsi->tsi_fid),
1652                oa->o_valid, start, end);
1653
1654         fo = ofd_object_find_exists(tsi->tsi_env, ofd_exp(tsi->tsi_exp),
1655                                     &tsi->tsi_fid);
1656         if (IS_ERR(fo))
1657                 GOTO(out, rc = PTR_ERR(fo));
1658
1659         la_from_obdo(&info->fti_attr, oa,
1660                      OBD_MD_FLMTIME | OBD_MD_FLATIME | OBD_MD_FLCTIME);
1661         info->fti_attr.la_size = start;
1662         info->fti_attr.la_valid |= LA_SIZE;
1663
1664         if (oa->o_valid & OBD_MD_FLFID) {
1665                 ff = &info->fti_mds_fid;
1666                 ofd_prepare_fidea(ff, oa);
1667         }
1668
1669         rc = ofd_object_punch(tsi->tsi_env, fo, start, end, &info->fti_attr,
1670                               ff, (struct obdo *)oa);
1671         if (rc)
1672                 GOTO(out_put, rc);
1673
1674         ofd_counter_incr(tsi->tsi_exp, LPROC_OFD_STATS_PUNCH,
1675                          tsi->tsi_jobid, 1);
1676         EXIT;
1677 out_put:
1678         ofd_object_put(tsi->tsi_env, fo);
1679 out:
1680         if (srvlock)
1681                 tgt_extent_unlock(&lh, LCK_PW);
1682         if (rc == 0) {
1683                 /* we do not call this before to avoid lu_object_find() in
1684                  *  ->lvbo_update() holding another reference on the object.
1685                  * otherwise concurrent destroy can make the object unavailable
1686                  * for 2nd lu_object_find() waiting for the first reference
1687                  * to go... deadlock! */
1688                 res = ldlm_resource_get(ns, NULL, &tsi->tsi_resid,
1689                                         LDLM_EXTENT, 0);
1690                 if (!IS_ERR(res)) {
1691                         ldlm_res_lvbo_update(res, NULL, 0);
1692                         ldlm_resource_putref(res);
1693                 }
1694         }
1695         return rc;
1696 }
1697
1698 static int ofd_quotactl(struct tgt_session_info *tsi)
1699 {
1700         struct obd_quotactl     *oqctl, *repoqc;
1701         int                      rc;
1702
1703         ENTRY;
1704
1705         oqctl = req_capsule_client_get(tsi->tsi_pill, &RMF_OBD_QUOTACTL);
1706         if (oqctl == NULL)
1707                 RETURN(err_serious(-EPROTO));
1708
1709         repoqc = req_capsule_server_get(tsi->tsi_pill, &RMF_OBD_QUOTACTL);
1710         if (repoqc == NULL)
1711                 RETURN(err_serious(-ENOMEM));
1712
1713         /* report success for quota on/off for interoperability with current MDT
1714          * stack */
1715         if (oqctl->qc_cmd == Q_QUOTAON || oqctl->qc_cmd == Q_QUOTAOFF)
1716                 RETURN(0);
1717
1718         *repoqc = *oqctl;
1719         rc = lquotactl_slv(tsi->tsi_env, tsi->tsi_tgt->lut_bottom, repoqc);
1720
1721         ofd_counter_incr(tsi->tsi_exp, LPROC_OFD_STATS_QUOTACTL,
1722                          tsi->tsi_jobid, 1);
1723
1724         RETURN(rc);
1725 }
1726
1727 /* High priority request handlers for OFD */
1728
1729 /* prolong locks for the current service time of the corresponding
1730  * portal (= OST_IO_PORTAL)
1731  */
1732 static inline int prolong_timeout(struct ptlrpc_request *req)
1733 {
1734         struct ptlrpc_service_part *svcpt = req->rq_rqbd->rqbd_svcpt;
1735
1736         if (AT_OFF)
1737                 return obd_timeout / 2;
1738
1739         return max(at_est2timeout(at_get(&svcpt->scp_at_estimate)),
1740                    ldlm_timeout);
1741 }
1742
1743 static int ofd_prolong_one_lock(struct tgt_session_info *tsi,
1744                                 struct ldlm_lock *lock,
1745                                 struct ldlm_extent *extent, int timeout)
1746 {
1747
1748         if (lock->l_flags & LDLM_FL_DESTROYED) /* lock already cancelled */
1749                 return 0;
1750
1751         /* XXX: never try to grab resource lock here because we're inside
1752          * exp_bl_list_lock; in ldlm_lockd.c to handle waiting list we take
1753          * res lock and then exp_bl_list_lock. */
1754
1755         if (!(lock->l_flags & LDLM_FL_AST_SENT))
1756                 /* ignore locks not being cancelled */
1757                 return 0;
1758
1759         LDLM_DEBUG(lock, "refreshed for req x"LPU64" ext("LPU64"->"LPU64") "
1760                          "to %ds.\n", tgt_ses_req(tsi)->rq_xid, extent->start,
1761                          extent->end, timeout);
1762
1763         /* OK. this is a possible lock the user holds doing I/O
1764          * let's refresh eviction timer for it */
1765         ldlm_refresh_waiting_lock(lock, timeout);
1766         return 1;
1767 }
1768
1769 static int ofd_prolong_extent_locks(struct tgt_session_info *tsi,
1770                                     __u64 start, __u64 end)
1771 {
1772         struct obd_export       *exp = tsi->tsi_exp;
1773         struct obdo             *oa  = &tsi->tsi_ost_body->oa;
1774         struct ldlm_extent       extent = {
1775                 .start = start,
1776                 .end = end
1777         };
1778         struct ldlm_lock        *lock;
1779         int                      timeout = prolong_timeout(tgt_ses_req(tsi));
1780         int                      lock_count = 0;
1781
1782         ENTRY;
1783
1784         if (oa->o_valid & OBD_MD_FLHANDLE) {
1785                 /* mostly a request should be covered by only one lock, try
1786                  * fast path. */
1787                 lock = ldlm_handle2lock(&oa->o_handle);
1788                 if (lock != NULL) {
1789                         /* Fast path to check if the lock covers the whole IO
1790                          * region exclusively. */
1791                         if (lock->l_granted_mode == LCK_PW &&
1792                             ldlm_extent_contain(&lock->l_policy_data.l_extent,
1793                                                 &extent)) {
1794                                 /* bingo */
1795                                 LASSERT(lock->l_export == exp);
1796                                 lock_count = ofd_prolong_one_lock(tsi, lock,
1797                                                              &extent, timeout);
1798                                 LDLM_LOCK_PUT(lock);
1799                                 RETURN(lock_count);
1800                         }
1801                         LDLM_LOCK_PUT(lock);
1802                 }
1803         }
1804
1805         spin_lock_bh(&exp->exp_bl_list_lock);
1806         list_for_each_entry(lock, &exp->exp_bl_list, l_exp_list) {
1807                 LASSERT(lock->l_flags & LDLM_FL_AST_SENT);
1808                 LASSERT(lock->l_resource->lr_type == LDLM_EXTENT);
1809
1810                 if (!ldlm_res_eq(&tsi->tsi_resid, &lock->l_resource->lr_name))
1811                         continue;
1812
1813                 if (!ldlm_extent_overlap(&lock->l_policy_data.l_extent,
1814                                          &extent))
1815                         continue;
1816
1817                 lock_count += ofd_prolong_one_lock(tsi, lock, &extent, timeout);
1818         }
1819         spin_unlock_bh(&exp->exp_bl_list_lock);
1820
1821         RETURN(lock_count);
1822 }
1823
1824 /**
1825  * Returns 1 if the given PTLRPC matches the given LDLM lock, or 0 if it does
1826  * not.
1827  */
1828 static int ofd_rw_hpreq_lock_match(struct ptlrpc_request *req,
1829                                    struct ldlm_lock *lock)
1830 {
1831         struct niobuf_remote    *rnb;
1832         struct obd_ioobj        *ioo;
1833         ldlm_mode_t              mode;
1834         struct ldlm_extent       ext;
1835         __u32                    opc = lustre_msg_get_opc(req->rq_reqmsg);
1836
1837         ENTRY;
1838
1839         ioo = req_capsule_client_get(&req->rq_pill, &RMF_OBD_IOOBJ);
1840         LASSERT(ioo != NULL);
1841
1842         rnb = req_capsule_client_get(&req->rq_pill, &RMF_NIOBUF_REMOTE);
1843         LASSERT(rnb != NULL);
1844
1845         ext.start = rnb->rnb_offset;
1846         rnb += ioo->ioo_bufcnt - 1;
1847         ext.end = rnb->rnb_offset + rnb->rnb_len - 1;
1848
1849         LASSERT(lock->l_resource != NULL);
1850         if (!ostid_res_name_eq(&ioo->ioo_oid, &lock->l_resource->lr_name))
1851                 RETURN(0);
1852
1853         mode = LCK_PW;
1854         if (opc == OST_READ)
1855                 mode |= LCK_PR;
1856
1857         if (!(lock->l_granted_mode & mode))
1858                 RETURN(0);
1859
1860         RETURN(ldlm_extent_overlap(&lock->l_policy_data.l_extent, &ext));
1861 }
1862
1863 /**
1864  * High-priority queue request check for whether the given PTLRPC request
1865  * (\a req) is blocking an LDLM lock cancel.
1866  *
1867  * Returns 1 if the given given PTLRPC request (\a req) is blocking an LDLM lock
1868  * cancel, 0 if it is not, and -EFAULT if the request is malformed.
1869  *
1870  * Only OST_READs, OST_WRITEs and OST_PUNCHes go on the h-p RPC queue.  This
1871  * function looks only at OST_READs and OST_WRITEs.
1872  */
1873 static int ofd_rw_hpreq_check(struct ptlrpc_request *req)
1874 {
1875         struct tgt_session_info *tsi;
1876         struct obd_ioobj        *ioo;
1877         struct niobuf_remote    *rnb;
1878         __u64                    start, end;
1879         int                      lock_count;
1880
1881         ENTRY;
1882
1883         /* Don't use tgt_ses_info() to get session info, because lock_match()
1884          * can be called while request has no processing thread yet. */
1885         tsi = lu_context_key_get(&req->rq_session, &tgt_session_key);
1886         LASSERT(tsi != NULL);
1887
1888         /*
1889          * Use LASSERT below because malformed RPCs should have
1890          * been filtered out in tgt_hpreq_handler().
1891          */
1892         ioo = req_capsule_client_get(&req->rq_pill, &RMF_OBD_IOOBJ);
1893         LASSERT(ioo != NULL);
1894
1895         rnb = req_capsule_client_get(&req->rq_pill, &RMF_NIOBUF_REMOTE);
1896         LASSERT(rnb != NULL);
1897         LASSERT(!(rnb->rnb_flags & OBD_BRW_SRVLOCK));
1898
1899         start = rnb->rnb_offset;
1900         rnb += ioo->ioo_bufcnt - 1;
1901         end = rnb->rnb_offset + rnb->rnb_len - 1;
1902
1903         DEBUG_REQ(D_RPCTRACE, req, "%s %s: refresh rw locks: "DFID
1904                                    " ("LPU64"->"LPU64")\n",
1905                   tgt_name(tsi->tsi_tgt), current->comm,
1906                   PFID(&tsi->tsi_fid), start, end);
1907
1908         lock_count = ofd_prolong_extent_locks(tsi, start, end);
1909
1910         CDEBUG(D_DLMTRACE, "%s: refreshed %u locks timeout for req %p.\n",
1911                tgt_name(tsi->tsi_tgt), lock_count, req);
1912
1913         RETURN(lock_count > 0);
1914 }
1915
1916 static void ofd_rw_hpreq_fini(struct ptlrpc_request *req)
1917 {
1918         ofd_rw_hpreq_check(req);
1919 }
1920
1921 /**
1922  * Like tgt_rw_hpreq_lock_match(), but for OST_PUNCH RPCs.
1923  */
1924 static int ofd_punch_hpreq_lock_match(struct ptlrpc_request *req,
1925                                       struct ldlm_lock *lock)
1926 {
1927         struct tgt_session_info *tsi;
1928
1929         /* Don't use tgt_ses_info() to get session info, because lock_match()
1930          * can be called while request has no processing thread yet. */
1931         tsi = lu_context_key_get(&req->rq_session, &tgt_session_key);
1932         LASSERT(tsi != NULL);
1933
1934         LASSERT(tsi->tsi_ost_body != NULL);
1935         if (tsi->tsi_ost_body->oa.o_valid & OBD_MD_FLHANDLE &&
1936             tsi->tsi_ost_body->oa.o_handle.cookie == lock->l_handle.h_cookie)
1937                 return 1;
1938
1939         return 0;
1940 }
1941
1942 /**
1943  * Like ost_rw_hpreq_check(), but for OST_PUNCH RPCs.
1944  */
1945 static int ofd_punch_hpreq_check(struct ptlrpc_request *req)
1946 {
1947         struct tgt_session_info *tsi;
1948         struct obdo             *oa;
1949         int                      lock_count;
1950
1951         ENTRY;
1952
1953         /* Don't use tgt_ses_info() to get session info, because lock_match()
1954          * can be called while request has no processing thread yet. */
1955         tsi = lu_context_key_get(&req->rq_session, &tgt_session_key);
1956         LASSERT(tsi != NULL);
1957         oa = &tsi->tsi_ost_body->oa;
1958
1959         LASSERT(!(oa->o_valid & OBD_MD_FLFLAGS &&
1960                   oa->o_flags & OBD_FL_SRVLOCK));
1961
1962         CDEBUG(D_DLMTRACE,
1963                "%s: refresh locks: "LPU64"/"LPU64" ("LPU64"->"LPU64")\n",
1964                tgt_name(tsi->tsi_tgt), tsi->tsi_resid.name[0],
1965                tsi->tsi_resid.name[1], oa->o_size, oa->o_blocks);
1966
1967         lock_count = ofd_prolong_extent_locks(tsi, oa->o_size, oa->o_blocks);
1968
1969         CDEBUG(D_DLMTRACE, "%s: refreshed %u locks timeout for req %p.\n",
1970                tgt_name(tsi->tsi_tgt), lock_count, req);
1971
1972         RETURN(lock_count > 0);
1973 }
1974
1975 static void ofd_punch_hpreq_fini(struct ptlrpc_request *req)
1976 {
1977         ofd_punch_hpreq_check(req);
1978 }
1979
1980 struct ptlrpc_hpreq_ops ofd_hpreq_rw = {
1981         .hpreq_lock_match       = ofd_rw_hpreq_lock_match,
1982         .hpreq_check            = ofd_rw_hpreq_check,
1983         .hpreq_fini             = ofd_rw_hpreq_fini
1984 };
1985
1986 struct ptlrpc_hpreq_ops ofd_hpreq_punch = {
1987         .hpreq_lock_match       = ofd_punch_hpreq_lock_match,
1988         .hpreq_check            = ofd_punch_hpreq_check,
1989         .hpreq_fini             = ofd_punch_hpreq_fini
1990 };
1991
1992 /** Assign high priority operations to the IO requests */
1993 static void ofd_hp_brw(struct tgt_session_info *tsi)
1994 {
1995         struct niobuf_remote    *rnb;
1996         struct obd_ioobj        *ioo;
1997
1998         ENTRY;
1999
2000         ioo = req_capsule_client_get(tsi->tsi_pill, &RMF_OBD_IOOBJ);
2001         LASSERT(ioo != NULL); /* must exist after request preprocessing */
2002         if (ioo->ioo_bufcnt > 0) {
2003                 rnb = req_capsule_client_get(tsi->tsi_pill, &RMF_NIOBUF_REMOTE);
2004                 LASSERT(rnb != NULL); /* must exist after request preprocessing */
2005
2006                 /* no high priority if server lock is needed */
2007                 if (rnb->rnb_flags & OBD_BRW_SRVLOCK)
2008                         return;
2009         }
2010         tgt_ses_req(tsi)->rq_ops = &ofd_hpreq_rw;
2011 }
2012
2013 static void ofd_hp_punch(struct tgt_session_info *tsi)
2014 {
2015         LASSERT(tsi->tsi_ost_body != NULL); /* must exists if we are here */
2016         /* no high-priority if server lock is needed */
2017         if (tsi->tsi_ost_body->oa.o_valid & OBD_MD_FLFLAGS &&
2018             tsi->tsi_ost_body->oa.o_flags & OBD_FL_SRVLOCK)
2019                 return;
2020         tgt_ses_req(tsi)->rq_ops = &ofd_hpreq_punch;
2021 }
2022
2023 #define OBD_FAIL_OST_READ_NET   OBD_FAIL_OST_BRW_NET
2024 #define OBD_FAIL_OST_WRITE_NET  OBD_FAIL_OST_BRW_NET
2025 #define OST_BRW_READ    OST_READ
2026 #define OST_BRW_WRITE   OST_WRITE
2027
2028 static struct tgt_handler ofd_tgt_handlers[] = {
2029 TGT_RPC_HANDLER(OST_FIRST_OPC,
2030                 0,                      OST_CONNECT,    tgt_connect,
2031                 &RQF_CONNECT, LUSTRE_OBD_VERSION),
2032 TGT_RPC_HANDLER(OST_FIRST_OPC,
2033                 0,                      OST_DISCONNECT, tgt_disconnect,
2034                 &RQF_OST_DISCONNECT, LUSTRE_OBD_VERSION),
2035 TGT_RPC_HANDLER(OST_FIRST_OPC,
2036                 0,                      OST_SET_INFO,   ofd_set_info_hdl,
2037                 &RQF_OBD_SET_INFO, LUSTRE_OST_VERSION),
2038 TGT_OST_HDL(0,                          OST_GET_INFO,   ofd_get_info_hdl),
2039 TGT_OST_HDL(HABEO_CORPUS| HABEO_REFERO, OST_GETATTR,    ofd_getattr_hdl),
2040 TGT_OST_HDL(HABEO_CORPUS| HABEO_REFERO | MUTABOR,
2041                                         OST_SETATTR,    ofd_setattr_hdl),
2042 TGT_OST_HDL(0           | HABEO_REFERO | MUTABOR,
2043                                         OST_CREATE,     ofd_create_hdl),
2044 TGT_OST_HDL(0           | HABEO_REFERO | MUTABOR,
2045                                         OST_DESTROY,    ofd_destroy_hdl),
2046 TGT_OST_HDL(0           | HABEO_REFERO, OST_STATFS,     ofd_statfs_hdl),
2047 TGT_OST_HDL_HP(HABEO_CORPUS| HABEO_REFERO,
2048                                         OST_BRW_READ,   tgt_brw_read,
2049                                                         ofd_hp_brw),
2050 /* don't set CORPUS flag for brw_write because -ENOENT may be valid case */
2051 TGT_OST_HDL_HP(HABEO_CORPUS| MUTABOR,   OST_BRW_WRITE,  tgt_brw_write,
2052                                                         ofd_hp_brw),
2053 TGT_OST_HDL_HP(HABEO_CORPUS| HABEO_REFERO | MUTABOR,
2054                                         OST_PUNCH,      ofd_punch_hdl,
2055                                                         ofd_hp_punch),
2056 TGT_OST_HDL(HABEO_CORPUS| HABEO_REFERO, OST_SYNC,       ofd_sync_hdl),
2057 TGT_OST_HDL(0           | HABEO_REFERO, OST_QUOTACTL,   ofd_quotactl),
2058 };
2059
2060 static struct tgt_opc_slice ofd_common_slice[] = {
2061         {
2062                 .tos_opc_start  = OST_FIRST_OPC,
2063                 .tos_opc_end    = OST_LAST_OPC,
2064                 .tos_hs         = ofd_tgt_handlers
2065         },
2066         {
2067                 .tos_opc_start  = OBD_FIRST_OPC,
2068                 .tos_opc_end    = OBD_LAST_OPC,
2069                 .tos_hs         = tgt_obd_handlers
2070         },
2071         {
2072                 .tos_opc_start  = LDLM_FIRST_OPC,
2073                 .tos_opc_end    = LDLM_LAST_OPC,
2074                 .tos_hs         = tgt_dlm_handlers
2075         },
2076         {
2077                 .tos_opc_start  = OUT_UPDATE_FIRST_OPC,
2078                 .tos_opc_end    = OUT_UPDATE_LAST_OPC,
2079                 .tos_hs         = tgt_out_handlers
2080         },
2081         {
2082                 .tos_opc_start  = SEQ_FIRST_OPC,
2083                 .tos_opc_end    = SEQ_LAST_OPC,
2084                 .tos_hs         = seq_handlers
2085         },
2086         {
2087                 .tos_opc_start  = LFSCK_FIRST_OPC,
2088                 .tos_opc_end    = LFSCK_LAST_OPC,
2089                 .tos_hs         = tgt_lfsck_handlers
2090         },
2091         {
2092                 .tos_hs         = NULL
2093         }
2094 };
2095
2096 static int ofd_init0(const struct lu_env *env, struct ofd_device *m,
2097                      struct lu_device_type *ldt, struct lustre_cfg *cfg)
2098 {
2099         const char              *dev = lustre_cfg_string(cfg, 0);
2100         struct ofd_thread_info  *info = NULL;
2101         struct obd_device       *obd;
2102         struct obd_statfs       *osfs;
2103         int                      rc;
2104
2105         ENTRY;
2106
2107         obd = class_name2obd(dev);
2108         if (obd == NULL) {
2109                 CERROR("Cannot find obd with name %s\n", dev);
2110                 RETURN(-ENODEV);
2111         }
2112
2113         rc = lu_env_refill((struct lu_env *)env);
2114         if (rc != 0)
2115                 RETURN(rc);
2116
2117         obd->u.obt.obt_magic = OBT_MAGIC;
2118
2119         m->ofd_fmd_max_num = OFD_FMD_MAX_NUM_DEFAULT;
2120         m->ofd_fmd_max_age = OFD_FMD_MAX_AGE_DEFAULT;
2121
2122         spin_lock_init(&m->ofd_flags_lock);
2123         m->ofd_raid_degraded = 0;
2124         m->ofd_syncjournal = 0;
2125         ofd_slc_set(m);
2126         m->ofd_grant_compat_disable = 0;
2127         m->ofd_soft_sync_limit = OFD_SOFT_SYNC_LIMIT_DEFAULT;
2128
2129         /* statfs data */
2130         spin_lock_init(&m->ofd_osfs_lock);
2131         m->ofd_osfs_age = cfs_time_shift_64(-1000);
2132         m->ofd_osfs_unstable = 0;
2133         m->ofd_statfs_inflight = 0;
2134         m->ofd_osfs_inflight = 0;
2135
2136         /* grant data */
2137         spin_lock_init(&m->ofd_grant_lock);
2138         m->ofd_tot_dirty = 0;
2139         m->ofd_tot_granted = 0;
2140         m->ofd_tot_pending = 0;
2141         m->ofd_seq_count = 0;
2142         init_waitqueue_head(&m->ofd_inconsistency_thread.t_ctl_waitq);
2143         INIT_LIST_HEAD(&m->ofd_inconsistency_list);
2144         spin_lock_init(&m->ofd_inconsistency_lock);
2145
2146         spin_lock_init(&m->ofd_batch_lock);
2147         init_rwsem(&m->ofd_lastid_rwsem);
2148
2149         obd->u.filter.fo_fl_oss_capa = 0;
2150         CFS_INIT_LIST_HEAD(&obd->u.filter.fo_capa_keys);
2151         obd->u.filter.fo_capa_hash = init_capa_hash();
2152         if (obd->u.filter.fo_capa_hash == NULL)
2153                 RETURN(-ENOMEM);
2154
2155         m->ofd_dt_dev.dd_lu_dev.ld_ops = &ofd_lu_ops;
2156         m->ofd_dt_dev.dd_lu_dev.ld_obd = obd;
2157         /* set this lu_device to obd, because error handling need it */
2158         obd->obd_lu_dev = &m->ofd_dt_dev.dd_lu_dev;
2159
2160         rc = ofd_procfs_init(m);
2161         if (rc) {
2162                 CERROR("Can't init ofd lprocfs, rc %d\n", rc);
2163                 RETURN(rc);
2164         }
2165
2166         /* No connection accepted until configurations will finish */
2167         spin_lock(&obd->obd_dev_lock);
2168         obd->obd_no_conn = 1;
2169         spin_unlock(&obd->obd_dev_lock);
2170         obd->obd_replayable = 1;
2171         if (cfg->lcfg_bufcount > 4 && LUSTRE_CFG_BUFLEN(cfg, 4) > 0) {
2172                 char *str = lustre_cfg_string(cfg, 4);
2173
2174                 if (strchr(str, 'n')) {
2175                         CWARN("%s: recovery disabled\n", obd->obd_name);
2176                         obd->obd_replayable = 0;
2177                 }
2178         }
2179
2180         info = ofd_info_init(env, NULL);
2181         if (info == NULL)
2182                 RETURN(-EFAULT);
2183
2184         rc = ofd_stack_init(env, m, cfg);
2185         if (rc) {
2186                 CERROR("Can't init device stack, rc %d\n", rc);
2187                 GOTO(err_fini_proc, rc);
2188         }
2189
2190         ofd_procfs_add_brw_stats_symlink(m);
2191
2192         /* populate cached statfs data */
2193         osfs = &ofd_info(env)->fti_u.osfs;
2194         rc = ofd_statfs_internal(env, m, osfs, 0, NULL);
2195         if (rc != 0) {
2196                 CERROR("%s: can't get statfs data, rc %d\n", obd->obd_name, rc);
2197                 GOTO(err_fini_stack, rc);
2198         }
2199         if (!IS_PO2(osfs->os_bsize)) {
2200                 CERROR("%s: blocksize (%d) is not a power of 2\n",
2201                                 obd->obd_name, osfs->os_bsize);
2202                 GOTO(err_fini_stack, rc = -EPROTO);
2203         }
2204         m->ofd_blockbits = fls(osfs->os_bsize) - 1;
2205
2206         m->ofd_precreate_batch = OFD_PRECREATE_BATCH_DEFAULT;
2207         if (osfs->os_bsize * osfs->os_blocks < OFD_PRECREATE_SMALL_FS)
2208                 m->ofd_precreate_batch = OFD_PRECREATE_BATCH_SMALL;
2209
2210         snprintf(info->fti_u.name, sizeof(info->fti_u.name), "%s-%s",
2211                  "filter"/*LUSTRE_OST_NAME*/, obd->obd_uuid.uuid);
2212         m->ofd_namespace = ldlm_namespace_new(obd, info->fti_u.name,
2213                                               LDLM_NAMESPACE_SERVER,
2214                                               LDLM_NAMESPACE_GREEDY,
2215                                               LDLM_NS_TYPE_OST);
2216         if (m->ofd_namespace == NULL)
2217                 GOTO(err_fini_stack, rc = -ENOMEM);
2218         /* set obd_namespace for compatibility with old code */
2219         obd->obd_namespace = m->ofd_namespace;
2220         ldlm_register_intent(m->ofd_namespace, ofd_intent_policy);
2221         m->ofd_namespace->ns_lvbo = &ofd_lvbo;
2222         m->ofd_namespace->ns_lvbp = m;
2223
2224         ptlrpc_init_client(LDLM_CB_REQUEST_PORTAL, LDLM_CB_REPLY_PORTAL,
2225                            "filter_ldlm_cb_client", &obd->obd_ldlm_client);
2226
2227         dt_conf_get(env, m->ofd_osd, &m->ofd_dt_conf);
2228
2229         /* Allow at most ddp_grant_reserved% of the available filesystem space
2230          * to be granted to clients, so that any errors in the grant overhead
2231          * calculations do not allow granting more space to clients than can be
2232          * written. Assumes that in aggregate the grant overhead calculations do
2233          * not have more than ddp_grant_reserved% estimation error in them. */
2234         m->ofd_grant_ratio =
2235                 ofd_grant_ratio_conv(m->ofd_dt_conf.ddp_grant_reserved);
2236
2237         rc = tgt_init(env, &m->ofd_lut, obd, m->ofd_osd, ofd_common_slice,
2238                       OBD_FAIL_OST_ALL_REQUEST_NET,
2239                       OBD_FAIL_OST_ALL_REPLY_NET);
2240         if (rc)
2241                 GOTO(err_free_ns, rc);
2242
2243         rc = ofd_fs_setup(env, m, obd);
2244         if (rc)
2245                 GOTO(err_fini_lut, rc);
2246
2247         rc = ofd_start_inconsistency_verification_thread(m);
2248         if (rc != 0)
2249                 GOTO(err_fini_fs, rc);
2250
2251         RETURN(0);
2252
2253 err_fini_fs:
2254         ofd_fs_cleanup(env, m);
2255 err_fini_lut:
2256         tgt_fini(env, &m->ofd_lut);
2257 err_free_ns:
2258         ldlm_namespace_free(m->ofd_namespace, 0, obd->obd_force);
2259         obd->obd_namespace = m->ofd_namespace = NULL;
2260 err_fini_stack:
2261         ofd_stack_fini(env, m, &m->ofd_osd->dd_lu_dev);
2262 err_fini_proc:
2263         ofd_procfs_fini(m);
2264         return rc;
2265 }
2266
2267 static void ofd_fini(const struct lu_env *env, struct ofd_device *m)
2268 {
2269         struct obd_device       *obd = ofd_obd(m);
2270         struct lu_device        *d   = &m->ofd_dt_dev.dd_lu_dev;
2271         struct lfsck_stop        stop;
2272
2273         stop.ls_status = LS_PAUSED;
2274         stop.ls_flags = 0;
2275         lfsck_stop(env, m->ofd_osd, &stop);
2276         target_recovery_fini(obd);
2277         obd_exports_barrier(obd);
2278         obd_zombie_barrier();
2279
2280         tgt_fini(env, &m->ofd_lut);
2281         ofd_stop_inconsistency_verification_thread(m);
2282         lfsck_degister(env, m->ofd_osd);
2283         ofd_fs_cleanup(env, m);
2284
2285         ofd_free_capa_keys(m);
2286         cleanup_capa_hash(obd->u.filter.fo_capa_hash);
2287
2288         if (m->ofd_namespace != NULL) {
2289                 ldlm_namespace_free(m->ofd_namespace, NULL,
2290                                     d->ld_obd->obd_force);
2291                 d->ld_obd->obd_namespace = m->ofd_namespace = NULL;
2292         }
2293
2294         ofd_stack_fini(env, m, &m->ofd_dt_dev.dd_lu_dev);
2295         ofd_procfs_fini(m);
2296         LASSERT(atomic_read(&d->ld_ref) == 0);
2297         server_put_mount(obd->obd_name, true);
2298         EXIT;
2299 }
2300
2301 static struct lu_device *ofd_device_fini(const struct lu_env *env,
2302                                          struct lu_device *d)
2303 {
2304         ENTRY;
2305         ofd_fini(env, ofd_dev(d));
2306         RETURN(NULL);
2307 }
2308
2309 static struct lu_device *ofd_device_free(const struct lu_env *env,
2310                                          struct lu_device *d)
2311 {
2312         struct ofd_device *m = ofd_dev(d);
2313
2314         dt_device_fini(&m->ofd_dt_dev);
2315         OBD_FREE_PTR(m);
2316         RETURN(NULL);
2317 }
2318
2319 static struct lu_device *ofd_device_alloc(const struct lu_env *env,
2320                                           struct lu_device_type *t,
2321                                           struct lustre_cfg *cfg)
2322 {
2323         struct ofd_device *m;
2324         struct lu_device  *l;
2325         int                rc;
2326
2327         OBD_ALLOC_PTR(m);
2328         if (m == NULL)
2329                 return ERR_PTR(-ENOMEM);
2330
2331         l = &m->ofd_dt_dev.dd_lu_dev;
2332         dt_device_init(&m->ofd_dt_dev, t);
2333         rc = ofd_init0(env, m, t, cfg);
2334         if (rc != 0) {
2335                 ofd_device_free(env, l);
2336                 l = ERR_PTR(rc);
2337         }
2338
2339         return l;
2340 }
2341
2342 /* thread context key constructor/destructor */
2343 LU_KEY_INIT_FINI(ofd, struct ofd_thread_info);
2344
2345 static void ofd_key_exit(const struct lu_context *ctx,
2346                          struct lu_context_key *key, void *data)
2347 {
2348         struct ofd_thread_info *info = data;
2349
2350         info->fti_env = NULL;
2351         info->fti_exp = NULL;
2352
2353         info->fti_xid = 0;
2354         info->fti_pre_version = 0;
2355         info->fti_used = 0;
2356
2357         memset(&info->fti_attr, 0, sizeof info->fti_attr);
2358 }
2359
2360 struct lu_context_key ofd_thread_key = {
2361         .lct_tags = LCT_DT_THREAD,
2362         .lct_init = ofd_key_init,
2363         .lct_fini = ofd_key_fini,
2364         .lct_exit = ofd_key_exit
2365 };
2366
2367 /* type constructor/destructor: mdt_type_init, mdt_type_fini */
2368 LU_TYPE_INIT_FINI(ofd, &ofd_thread_key);
2369
2370 static struct lu_device_type_operations ofd_device_type_ops = {
2371         .ldto_init              = ofd_type_init,
2372         .ldto_fini              = ofd_type_fini,
2373
2374         .ldto_start             = ofd_type_start,
2375         .ldto_stop              = ofd_type_stop,
2376
2377         .ldto_device_alloc      = ofd_device_alloc,
2378         .ldto_device_free       = ofd_device_free,
2379         .ldto_device_fini       = ofd_device_fini
2380 };
2381
2382 static struct lu_device_type ofd_device_type = {
2383         .ldt_tags       = LU_DEVICE_DT,
2384         .ldt_name       = LUSTRE_OST_NAME,
2385         .ldt_ops        = &ofd_device_type_ops,
2386         .ldt_ctx_tags   = LCT_DT_THREAD
2387 };
2388
2389 int __init ofd_init(void)
2390 {
2391         int                             rc;
2392
2393         rc = lu_kmem_init(ofd_caches);
2394         if (rc)
2395                 return rc;
2396
2397         rc = ofd_fmd_init();
2398         if (rc) {
2399                 lu_kmem_fini(ofd_caches);
2400                 return(rc);
2401         }
2402
2403         rc = class_register_type(&ofd_obd_ops, NULL, true, NULL,
2404 #ifndef HAVE_ONLY_PROCFS_SEQ
2405                                  NULL,
2406 #endif
2407                                  LUSTRE_OST_NAME, &ofd_device_type);
2408         return rc;
2409 }
2410
2411 void __exit ofd_exit(void)
2412 {
2413         ofd_fmd_exit();
2414         lu_kmem_fini(ofd_caches);
2415         class_unregister_type(LUSTRE_OST_NAME);
2416 }
2417
2418 MODULE_AUTHOR("Whamcloud, Inc. <http://www.whamcloud.com/>");
2419 MODULE_DESCRIPTION("Lustre Object Filtering Device");
2420 MODULE_LICENSE("GPL");
2421
2422 module_init(ofd_init);
2423 module_exit(ofd_exit);