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                        m->ofd_dt_dev.dd_lu_dev.ld_obd->obd_name, 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                        m->ofd_dt_dev.dd_lu_dev.ld_obd->obd_name, 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         m->ofd_osd = NULL;
 186
 187         EXIT;
 188 }
 189
 190 /* For interoperability, see mdt_interop_param[]. */
 191 static struct cfg_interop_param ofd_interop_param[] = {
 192         { "ost.quota_type",     NULL },
 193         { NULL }
 194 };
 195
 196 /* used by MGS to process specific configurations */
 197 static int ofd_process_config(const struct lu_env *env, struct lu_device *d,
 198                               struct lustre_cfg *cfg)
 199 {
 200         struct ofd_device       *m = ofd_dev(d);
 201         struct dt_device        *dt_next = m->ofd_osd;
 202         struct lu_device        *next = &dt_next->dd_lu_dev;
 203         int                      rc;
 204
 205         ENTRY;
 206
 207         switch (cfg->lcfg_command) {
 208         case LCFG_PARAM: {
 209                 struct lprocfs_static_vars lvars;
 210
 211                 /* For interoperability */
 212                 struct cfg_interop_param   *ptr = NULL;
 213                 struct lustre_cfg          *old_cfg = NULL;
 214                 char                       *param = NULL;
 215
 216                 param = lustre_cfg_string(cfg, 1);
 217                 if (param == NULL) {
 218                         CERROR("param is empty\n");
 219                         rc = -EINVAL;
 220                         break;
 221                 }
 222
 223                 ptr = class_find_old_param(param, ofd_interop_param);
 224                 if (ptr != NULL) {
 225                         if (ptr->new_param == NULL) {
 226                                 rc = 0;
 227                                 CWARN("For interoperability, skip this %s."
 228                                       " It is obsolete.\n", ptr->old_param);
 229                                 break;
 230                         }
 231
 232                         CWARN("Found old param %s, changed it to %s.\n",
 233                               ptr->old_param, ptr->new_param);
 234
 235                         old_cfg = cfg;
 236                         cfg = lustre_cfg_rename(old_cfg, ptr->new_param);
 237                         if (IS_ERR(cfg)) {
 238                                 rc = PTR_ERR(cfg);
 239                                 break;
 240                         }
 241                 }
 242
 243                 lprocfs_ofd_init_vars(&lvars);
 244                 rc = class_process_proc_param(PARAM_OST, lvars.obd_vars, cfg,
 245                                               d->ld_obd);
 246                 if (rc > 0 || rc == -ENOSYS)
 247                         /* we don't understand; pass it on */
 248                         rc = next->ld_ops->ldo_process_config(env, next, cfg);
 249                 break;
 250         }
 251         case LCFG_SPTLRPC_CONF: {
 252                 rc = -ENOTSUPP;
 253                 break;
 254         }
 255         default:
 256                 /* others are passed further */
 257                 rc = next->ld_ops->ldo_process_config(env, next, cfg);
 258                 break;
 259         }
 260         RETURN(rc);
 261 }
 262
 263 static int ofd_object_init(const struct lu_env *env, struct lu_object *o,
 264                            const struct lu_object_conf *conf)
 265 {
 266         struct ofd_device       *d = ofd_dev(o->lo_dev);
 267         struct lu_device        *under;
 268         struct lu_object        *below;
 269         int                      rc = 0;
 270
 271         ENTRY;
 272
 273         CDEBUG(D_INFO, "object init, fid = "DFID"\n",
 274                PFID(lu_object_fid(o)));
 275
 276         under = &d->ofd_osd->dd_lu_dev;
 277         below = under->ld_ops->ldo_object_alloc(env, o->lo_header, under);
 278         if (below != NULL)
 279                 lu_object_add(o, below);
 280         else
 281                 rc = -ENOMEM;
 282
 283         RETURN(rc);
 284 }
 285
 286 static void ofd_object_free(const struct lu_env *env, struct lu_object *o)
 287 {
 288         struct ofd_object       *of = ofd_obj(o);
 289         struct lu_object_header *h;
 290
 291         ENTRY;
 292
 293         h = o->lo_header;
 294         CDEBUG(D_INFO, "object free, fid = "DFID"\n",
 295                PFID(lu_object_fid(o)));
 296
 297         lu_object_fini(o);
 298         lu_object_header_fini(h);
 299         OBD_SLAB_FREE_PTR(of, ofd_object_kmem);
 300         EXIT;
 301 }
 302
 303 static int ofd_object_print(const struct lu_env *env, void *cookie,
 304                             lu_printer_t p, const struct lu_object *o)
 305 {
 306         return (*p)(env, cookie, LUSTRE_OST_NAME"-object@%p", o);
 307 }
 308
 309 struct lu_object_operations ofd_obj_ops = {
 310         .loo_object_init        = ofd_object_init,
 311         .loo_object_free        = ofd_object_free,
 312         .loo_object_print       = ofd_object_print
 313 };
 314
 315 static struct lu_object *ofd_object_alloc(const struct lu_env *env,
 316                                           const struct lu_object_header *hdr,
 317                                           struct lu_device *d)
 318 {
 319         struct ofd_object *of;
 320
 321         ENTRY;
 322
 323         OBD_SLAB_ALLOC_PTR_GFP(of, ofd_object_kmem, __GFP_IO);
 324         if (of != NULL) {
 325                 struct lu_object        *o;
 326                 struct lu_object_header *h;
 327
 328                 o = &of->ofo_obj.do_lu;
 329                 h = &of->ofo_header;
 330                 lu_object_header_init(h);
 331                 lu_object_init(o, h, d);
 332                 lu_object_add_top(h, o);
 333                 o->lo_ops = &ofd_obj_ops;
 334                 RETURN(o);
 335         } else {
 336                 RETURN(NULL);
 337         }
 338 }
 339
 340 extern int ost_handle(struct ptlrpc_request *req);
 341
 342 static int ofd_prepare(const struct lu_env *env, struct lu_device *pdev,
 343                        struct lu_device *dev)
 344 {
 345         struct ofd_thread_info          *info;
 346         struct ofd_device               *ofd = ofd_dev(dev);
 347         struct obd_device               *obd = ofd_obd(ofd);
 348         struct lu_device                *next = &ofd->ofd_osd->dd_lu_dev;
 349         struct lfsck_start_param         lsp;
 350         int                              rc;
 351
 352         ENTRY;
 353
 354         rc = lu_env_refill((struct lu_env *)env);
 355         if (rc != 0) {
 356                 CERROR("Failure to refill session: '%d'\n", rc);
 357                 RETURN(rc);
 358         }
 359
 360         info = ofd_info_init(env, NULL);
 361         if (info == NULL)
 362                 RETURN(-EFAULT);
 363
 364         /* initialize lower device */
 365         rc = next->ld_ops->ldo_prepare(env, dev, next);
 366         if (rc != 0)
 367                 RETURN(rc);
 368
 369         rc = lfsck_register(env, ofd->ofd_osd, &ofd->ofd_dt_dev, false);
 370         if (rc != 0) {
 371                 CERROR("%s: failed to initialize lfsck: rc = %d\n",
 372                        obd->obd_name, rc);
 373                 RETURN(rc);
 374         }
 375
 376         lsp.lsp_start = NULL;
 377         lsp.lsp_namespace = ofd->ofd_namespace;
 378         rc = lfsck_start(env, ofd->ofd_osd, &lsp);
 379         if (rc != 0) {
 380                 CWARN("%s: auto trigger paused LFSCK failed: rc = %d\n",
 381                       obd->obd_name, rc);
 382                 rc = 0;
 383         }
 384
 385         target_recovery_init(&ofd->ofd_lut, tgt_request_handle);
 386         LASSERT(obd->obd_no_conn);
 387         spin_lock(&obd->obd_dev_lock);
 388         obd->obd_no_conn = 0;
 389         spin_unlock(&obd->obd_dev_lock);
 390
 391         if (obd->obd_recovering == 0)
 392                 ofd_postrecov(env, ofd);
 393
 394         RETURN(rc);
 395 }
 396
 397 static int ofd_recovery_complete(const struct lu_env *env,
 398                                  struct lu_device *dev)
 399 {
 400         struct ofd_device       *ofd = ofd_dev(dev);
 401         struct lu_device        *next = &ofd->ofd_osd->dd_lu_dev;
 402         int                      rc = 0, max_precreate;
 403
 404         ENTRY;
 405
 406         /* Grant space for object precreation on the self export.
 407          * This initial reserved space (i.e. 10MB for zfs and 280KB for ldiskfs)
 408          * is enough to create 10k objects. More space is then acquired for
 409          * precreation in ofd_grant_create().
 410          */
 411         max_precreate = OST_MAX_PRECREATE * ofd->ofd_dt_conf.ddp_inodespace / 2;
 412         ofd_grant_connect(env, dev->ld_obd->obd_self_export, max_precreate,
 413                           false);
 414         rc = next->ld_ops->ldo_recovery_complete(env, next);
 415         RETURN(rc);
 416 }
 417
 418 static struct lu_device_operations ofd_lu_ops = {
 419         .ldo_object_alloc       = ofd_object_alloc,
 420         .ldo_process_config     = ofd_process_config,
 421         .ldo_recovery_complete  = ofd_recovery_complete,
 422         .ldo_prepare            = ofd_prepare,
 423 };
 424
 425 static int ofd_procfs_init(struct ofd_device *ofd)
 426 {
 427         struct lprocfs_static_vars       lvars;
 428         struct obd_device               *obd = ofd_obd(ofd);
 429         cfs_proc_dir_entry_t            *entry;
 430         int                              rc = 0;
 431
 432         ENTRY;
 433
 434         /* lprocfs must be setup before the ofd so state can be safely added
 435          * to /proc incrementally as the ofd is setup */
 436         lprocfs_ofd_init_vars(&lvars);
 437         rc = lprocfs_obd_setup(obd, lvars.obd_vars);
 438         if (rc) {
 439                 CERROR("%s: lprocfs_obd_setup failed: %d.\n",
 440                        obd->obd_name, rc);
 441                 RETURN(rc);
 442         }
 443
 444         rc = lprocfs_alloc_obd_stats(obd, LPROC_OFD_STATS_LAST);
 445         if (rc) {
 446                 CERROR("%s: lprocfs_alloc_obd_stats failed: %d.\n",
 447                        obd->obd_name, rc);
 448                 GOTO(obd_cleanup, rc);
 449         }
 450
 451         obd->obd_uses_nid_stats = 1;
 452
 453         entry = lprocfs_register("exports", obd->obd_proc_entry, NULL, NULL);
 454         if (IS_ERR(entry)) {
 455                 rc = PTR_ERR(entry);
 456                 CERROR("%s: error %d setting up lprocfs for %s\n",
 457                        obd->obd_name, rc, "exports");
 458                 GOTO(obd_cleanup, rc);
 459         }
 460         obd->obd_proc_exports_entry = entry;
 461
 462         entry = lprocfs_add_simple(obd->obd_proc_exports_entry, "clear",
 463                                    lprocfs_nid_stats_clear_read,
 464                                    lprocfs_nid_stats_clear_write, obd, NULL);
 465         if (IS_ERR(entry)) {
 466                 rc = PTR_ERR(entry);
 467                 CERROR("%s: add proc entry 'clear' failed: %d.\n",
 468                        obd->obd_name, rc);
 469                 GOTO(obd_cleanup, rc);
 470         }
 471
 472         ofd_stats_counter_init(obd->obd_stats);
 473
 474         rc = lprocfs_job_stats_init(obd, LPROC_OFD_STATS_LAST,
 475                                     ofd_stats_counter_init);
 476         if (rc)
 477                 GOTO(remove_entry_clear, rc);
 478         RETURN(0);
 479 remove_entry_clear:
 480         lprocfs_remove_proc_entry("clear", obd->obd_proc_exports_entry);
 481 obd_cleanup:
 482         lprocfs_obd_cleanup(obd);
 483         lprocfs_free_obd_stats(obd);
 484
 485         return rc;
 486 }
 487
 488 static void ofd_procfs_add_brw_stats_symlink(struct ofd_device *ofd)
 489 {
 490         struct obd_device       *obd = ofd_obd(ofd);
 491         struct obd_device       *osd_obd = ofd->ofd_osd_exp->exp_obd;
 492         cfs_proc_dir_entry_t    *osd_root = osd_obd->obd_type->typ_procroot;
 493         cfs_proc_dir_entry_t    *osd_dir;
 494
 495         osd_dir = lprocfs_srch(osd_root, obd->obd_name);
 496         if (osd_dir == NULL)
 497                 return;
 498
 499         if (lprocfs_srch(osd_dir, "brw_stats") != NULL)
 500                 lprocfs_add_symlink("brw_stats", obd->obd_proc_entry,
 501                                     "../../%s/%s/brw_stats",
 502                                     osd_root->name, osd_dir->name);
 503
 504         if (lprocfs_srch(osd_dir, "read_cache_enable") != NULL)
 505                 lprocfs_add_symlink("read_cache_enable", obd->obd_proc_entry,
 506                                     "../../%s/%s/read_cache_enable",
 507                                     osd_root->name, osd_dir->name);
 508
 509         if (lprocfs_srch(osd_dir, "readcache_max_filesize") != NULL)
 510                 lprocfs_add_symlink("readcache_max_filesize",
 511                                     obd->obd_proc_entry,
 512                                     "../../%s/%s/readcache_max_filesize",
 513                                     osd_root->name, osd_dir->name);
 514
 515         if (lprocfs_srch(osd_dir, "writethrough_cache_enable") != NULL)
 516                 lprocfs_add_symlink("writethrough_cache_enable",
 517                                     obd->obd_proc_entry,
 518                                     "../../%s/%s/writethrough_cache_enable",
 519                                     osd_root->name, osd_dir->name);
 520 }
 521
 522 static void ofd_procfs_fini(struct ofd_device *ofd)
 523 {
 524         struct obd_device *obd = ofd_obd(ofd);
 525
 526         lprocfs_remove_proc_entry("writethrough_cache_enable",
 527                                   obd->obd_proc_entry);
 528         lprocfs_remove_proc_entry("readcache_max_filesize",
 529                                   obd->obd_proc_entry);
 530         lprocfs_remove_proc_entry("read_cache_enable", obd->obd_proc_entry);
 531         lprocfs_remove_proc_entry("brw_stats", obd->obd_proc_entry);
 532         lprocfs_remove_proc_entry("clear", obd->obd_proc_exports_entry);
 533         lprocfs_free_per_client_stats(obd);
 534         lprocfs_obd_cleanup(obd);
 535         lprocfs_free_obd_stats(obd);
 536         lprocfs_job_stats_fini(obd);
 537 }
 538
 539 extern int ost_handle(struct ptlrpc_request *req);
 540
 541 int ofd_fid_fini(const struct lu_env *env, struct ofd_device *ofd)
 542 {
 543         return seq_site_fini(env, &ofd->ofd_seq_site);
 544 }
 545
 546 int ofd_fid_init(const struct lu_env *env, struct ofd_device *ofd)
 547 {
 548         struct seq_server_site  *ss = &ofd->ofd_seq_site;
 549         struct lu_device        *lu = &ofd->ofd_dt_dev.dd_lu_dev;
 550         char                    *obd_name = ofd_name(ofd);
 551         char                    *name = NULL;
 552         int                     rc = 0;
 553
 554         ss = &ofd->ofd_seq_site;
 555         lu->ld_site->ld_seq_site = ss;
 556         ss->ss_lu = lu->ld_site;
 557         ss->ss_node_id = ofd->ofd_lut.lut_lsd.lsd_osd_index;
 558
 559         OBD_ALLOC_PTR(ss->ss_server_seq);
 560         if (ss->ss_server_seq == NULL)
 561                 GOTO(out_free, rc = -ENOMEM);
 562
 563         OBD_ALLOC(name, strlen(obd_name) + 10);
 564         if (!name) {
 565                 OBD_FREE_PTR(ss->ss_server_seq);
 566                 ss->ss_server_seq = NULL;
 567                 GOTO(out_free, rc = -ENOMEM);
 568         }
 569
 570         rc = seq_server_init(ss->ss_server_seq, ofd->ofd_osd, obd_name,
 571                              LUSTRE_SEQ_SERVER, ss, env);
 572         if (rc) {
 573                 CERROR("%s : seq server init error %d\n", obd_name, rc);
 574                 GOTO(out_free, rc);
 575         }
 576         ss->ss_server_seq->lss_space.lsr_index = ss->ss_node_id;
 577
 578         OBD_ALLOC_PTR(ss->ss_client_seq);
 579         if (ss->ss_client_seq == NULL)
 580                 GOTO(out_free, rc = -ENOMEM);
 581
 582         snprintf(name, strlen(obd_name) + 6, "%p-super", obd_name);
 583         rc = seq_client_init(ss->ss_client_seq, NULL, LUSTRE_SEQ_DATA,
 584                              name, NULL);
 585         if (rc) {
 586                 CERROR("%s : seq client init error %d\n", obd_name, rc);
 587                 GOTO(out_free, rc);
 588         }
 589         OBD_FREE(name, strlen(obd_name) + 10);
 590         name = NULL;
 591
 592         rc = seq_server_set_cli(ss->ss_server_seq, ss->ss_client_seq, env);
 593
 594 out_free:
 595         if (rc) {
 596                 if (ss->ss_server_seq) {
 597                         seq_server_fini(ss->ss_server_seq, env);
 598                         OBD_FREE_PTR(ss->ss_server_seq);
 599                         ss->ss_server_seq = NULL;
 600                 }
 601
 602                 if (ss->ss_client_seq) {
 603                         seq_client_fini(ss->ss_client_seq);
 604                         OBD_FREE_PTR(ss->ss_client_seq);
 605                         ss->ss_client_seq = NULL;
 606                 }
 607
 608                 if (name) {
 609                         OBD_FREE(name, strlen(obd_name) + 10);
 610                         name = NULL;
 611                 }
 612         }
 613
 614         return rc;
 615 }
 616
 617 int ofd_set_info_hdl(struct tgt_session_info *tsi)
 618 {
 619         struct ptlrpc_request   *req = tgt_ses_req(tsi);
 620         struct ost_body         *body = NULL, *repbody;
 621         void                    *key, *val = NULL;
 622         int                      keylen, vallen, rc = 0;
 623         bool                     is_grant_shrink;
 624         struct ofd_device       *ofd = ofd_exp(tsi->tsi_exp);
 625
 626         ENTRY;
 627
 628         key = req_capsule_client_get(tsi->tsi_pill, &RMF_SETINFO_KEY);
 629         if (key == NULL) {
 630                 DEBUG_REQ(D_HA, req, "no set_info key");
 631                 RETURN(err_serious(-EFAULT));
 632         }
 633         keylen = req_capsule_get_size(tsi->tsi_pill, &RMF_SETINFO_KEY,
 634                                       RCL_CLIENT);
 635
 636         val = req_capsule_client_get(tsi->tsi_pill, &RMF_SETINFO_VAL);
 637         if (val == NULL) {
 638                 DEBUG_REQ(D_HA, req, "no set_info val");
 639                 RETURN(err_serious(-EFAULT));
 640         }
 641         vallen = req_capsule_get_size(tsi->tsi_pill, &RMF_SETINFO_VAL,
 642                                       RCL_CLIENT);
 643
 644         is_grant_shrink = KEY_IS(KEY_GRANT_SHRINK);
 645         if (is_grant_shrink)
 646                 /* In this case the value is actually an RMF_OST_BODY, so we
 647                  * transmutate the type of this PTLRPC */
 648                 req_capsule_extend(tsi->tsi_pill, &RQF_OST_SET_GRANT_INFO);
 649
 650         rc = req_capsule_server_pack(tsi->tsi_pill);
 651         if (rc < 0)
 652                 RETURN(rc);
 653
 654         if (is_grant_shrink) {
 655                 body = req_capsule_client_get(tsi->tsi_pill, &RMF_OST_BODY);
 656
 657                 repbody = req_capsule_server_get(tsi->tsi_pill, &RMF_OST_BODY);
 658                 *repbody = *body;
 659
 660                 /** handle grant shrink, similar to a read request */
 661                 ofd_grant_prepare_read(tsi->tsi_env, tsi->tsi_exp,
 662                                        &repbody->oa);
 663         } else if (KEY_IS(KEY_EVICT_BY_NID)) {
 664                 if (vallen > 0)
 665                         obd_export_evict_by_nid(tsi->tsi_exp->exp_obd, val);
 666                 rc = 0;
 667         } else if (KEY_IS(KEY_CAPA_KEY)) {
 668                 rc = ofd_update_capa_key(ofd, val);
 669         } else if (KEY_IS(KEY_SPTLRPC_CONF)) {
 670                 rc = tgt_adapt_sptlrpc_conf(tsi->tsi_tgt, 0);
 671         } else {
 672                 CERROR("%s: Unsupported key %s\n",
 673                        tgt_name(tsi->tsi_tgt), (char *)key);
 674                 rc = -EOPNOTSUPP;
 675         }
 676         ofd_counter_incr(tsi->tsi_exp, LPROC_OFD_STATS_SET_INFO,
 677                          tsi->tsi_jobid, 1);
 678
 679         RETURN(rc);
 680 }
 681
 682 static int ofd_fiemap_get(const struct lu_env *env, struct ofd_device *ofd,
 683                           struct lu_fid *fid, struct ll_user_fiemap *fiemap)
 684 {
 685         struct ofd_object       *fo;
 686         int                      rc;
 687
 688         fo = ofd_object_find(env, ofd, fid);
 689         if (IS_ERR(fo)) {
 690                 CERROR("%s: error finding object "DFID"\n",
 691                        ofd_name(ofd), PFID(fid));
 692                 return PTR_ERR(fo);
 693         }
 694
 695         ofd_read_lock(env, fo);
 696         if (ofd_object_exists(fo))
 697                 rc = dt_fiemap_get(env, ofd_object_child(fo), fiemap);
 698         else
 699                 rc = -ENOENT;
 700         ofd_read_unlock(env, fo);
 701         ofd_object_put(env, fo);
 702         return rc;
 703 }
 704
 705 struct locked_region {
 706         cfs_list_t              list;
 707         struct lustre_handle    lh;
 708 };
 709
 710 static int lock_region(struct ldlm_namespace *ns, struct ldlm_res_id *res_id,
 711                        unsigned long long begin, unsigned long long end,
 712                        cfs_list_t *locked)
 713 {
 714         struct locked_region    *region = NULL;
 715         __u64                    flags = 0;
 716         int                      rc;
 717
 718         LASSERT(begin <= end);
 719         OBD_ALLOC_PTR(region);
 720         if (region == NULL)
 721                 return -ENOMEM;
 722
 723         rc = tgt_extent_lock(ns, res_id, begin, end, &region->lh,
 724                              LCK_PR, &flags);
 725         if (rc != 0)
 726                 return rc;
 727
 728         CDEBUG(D_OTHER, "ost lock [%llu,%llu], lh=%p\n", begin, end,
 729                &region->lh);
 730         cfs_list_add(&region->list, locked);
 731
 732         return 0;
 733 }
 734
 735 static int lock_zero_regions(struct ldlm_namespace *ns,
 736                              struct ldlm_res_id *res_id,
 737                              struct ll_user_fiemap *fiemap,
 738                              cfs_list_t *locked)
 739 {
 740         __u64 begin = fiemap->fm_start;
 741         unsigned int i;
 742         int rc = 0;
 743         struct ll_fiemap_extent *fiemap_start = fiemap->fm_extents;
 744
 745         ENTRY;
 746
 747         CDEBUG(D_OTHER, "extents count %u\n", fiemap->fm_mapped_extents);
 748         for (i = 0; i < fiemap->fm_mapped_extents; i++) {
 749                 if (fiemap_start[i].fe_logical > begin) {
 750                         CDEBUG(D_OTHER, "ost lock [%llu,%llu]\n",
 751                                begin, fiemap_start[i].fe_logical);
 752                         rc = lock_region(ns, res_id, begin,
 753                                          fiemap_start[i].fe_logical, locked);
 754                         if (rc)
 755                                 RETURN(rc);
 756                 }
 757
 758                 begin = fiemap_start[i].fe_logical + fiemap_start[i].fe_length;
 759         }
 760
 761         if (begin < (fiemap->fm_start + fiemap->fm_length)) {
 762                 CDEBUG(D_OTHER, "ost lock [%llu,%llu]\n",
 763                        begin, fiemap->fm_start + fiemap->fm_length);
 764                 rc = lock_region(ns, res_id, begin,
 765                                  fiemap->fm_start + fiemap->fm_length, locked);
 766         }
 767
 768         RETURN(rc);
 769 }
 770
 771 static void unlock_zero_regions(struct ldlm_namespace *ns, cfs_list_t *locked)
 772 {
 773         struct locked_region *entry, *temp;
 774
 775         cfs_list_for_each_entry_safe(entry, temp, locked, list) {
 776                 CDEBUG(D_OTHER, "ost unlock lh=%p\n", &entry->lh);
 777                 tgt_extent_unlock(&entry->lh, LCK_PR);
 778                 cfs_list_del(&entry->list);
 779                 OBD_FREE_PTR(entry);
 780         }
 781 }
 782
 783 int ofd_get_info_hdl(struct tgt_session_info *tsi)
 784 {
 785         struct obd_export               *exp = tsi->tsi_exp;
 786         struct ofd_device               *ofd = ofd_exp(exp);
 787         struct ofd_thread_info          *fti = tsi2ofd_info(tsi);
 788         void                            *key;
 789         int                              keylen;
 790         int                              replylen, rc = 0;
 791
 792         ENTRY;
 793
 794         /* this common part for get_info rpc */
 795         key = req_capsule_client_get(tsi->tsi_pill, &RMF_GETINFO_KEY);
 796         if (key == NULL) {
 797                 DEBUG_REQ(D_HA, tgt_ses_req(tsi), "no get_info key");
 798                 RETURN(err_serious(-EPROTO));
 799         }
 800         keylen = req_capsule_get_size(tsi->tsi_pill, &RMF_GETINFO_KEY,
 801                                       RCL_CLIENT);
 802
 803         if (KEY_IS(KEY_LAST_ID)) {
 804                 obd_id          *last_id;
 805                 struct ofd_seq  *oseq;
 806
 807                 req_capsule_extend(tsi->tsi_pill, &RQF_OST_GET_INFO_LAST_ID);
 808                 rc = req_capsule_server_pack(tsi->tsi_pill);
 809                 if (rc)
 810                         RETURN(err_serious(rc));
 811
 812                 last_id = req_capsule_server_get(tsi->tsi_pill, &RMF_OBD_ID);
 813
 814                 oseq = ofd_seq_load(tsi->tsi_env, ofd,
 815                                     (obd_seq)exp->exp_filter_data.fed_group);
 816                 if (IS_ERR(oseq))
 817                         rc = -EFAULT;
 818                 else
 819                         *last_id = ofd_seq_last_oid(oseq);
 820                 ofd_seq_put(tsi->tsi_env, oseq);
 821         } else if (KEY_IS(KEY_FIEMAP)) {
 822                 struct ll_fiemap_info_key       *fm_key;
 823                 struct ll_user_fiemap           *fiemap;
 824                 struct lu_fid                   *fid = &fti->fti_fid;
 825
 826                 req_capsule_extend(tsi->tsi_pill, &RQF_OST_GET_INFO_FIEMAP);
 827
 828                 fm_key = req_capsule_client_get(tsi->tsi_pill, &RMF_FIEMAP_KEY);
 829                 rc = tgt_validate_obdo(tsi, &fm_key->oa);
 830                 if (rc)
 831                         RETURN(err_serious(rc));
 832
 833                 replylen = fiemap_count_to_size(fm_key->fiemap.fm_extent_count);
 834                 req_capsule_set_size(tsi->tsi_pill, &RMF_FIEMAP_VAL,
 835                                      RCL_SERVER, replylen);
 836
 837                 rc = req_capsule_server_pack(tsi->tsi_pill);
 838                 if (rc)
 839                         RETURN(err_serious(rc));
 840
 841                 fiemap = req_capsule_server_get(tsi->tsi_pill, &RMF_FIEMAP_VAL);
 842                 if (fiemap == NULL)
 843                         RETURN(-ENOMEM);
 844
 845                 rc = ostid_to_fid(fid, &fm_key->oa.o_oi, 0);
 846                 if (rc != 0)
 847                         RETURN(rc);
 848
 849                 CDEBUG(D_INODE, "get FIEMAP of object "DFID"\n", PFID(fid));
 850
 851                 *fiemap = fm_key->fiemap;
 852                 rc = ofd_fiemap_get(tsi->tsi_env, ofd, fid, fiemap);
 853
 854                 /* LU-3219: Lock the sparse areas to make sure dirty
 855                  * flushed back from client, then call fiemap again. */
 856                 if (fm_key->oa.o_valid & OBD_MD_FLFLAGS &&
 857                     fm_key->oa.o_flags & OBD_FL_SRVLOCK) {
 858                         cfs_list_t locked = CFS_LIST_HEAD_INIT(locked);
 859
 860                         ost_fid_build_resid(fid, &fti->fti_resid);
 861                         rc = lock_zero_regions(ofd->ofd_namespace,
 862                                                &fti->fti_resid, fiemap,
 863                                                &locked);
 864                         if (rc == 0 && !cfs_list_empty(&locked)) {
 865                                 rc = ofd_fiemap_get(tsi->tsi_env, ofd, fid,
 866                                                     fiemap);
 867                                 unlock_zero_regions(ofd->ofd_namespace,
 868                                                     &locked);
 869                         }
 870                 }
 871         } else if (KEY_IS(KEY_LAST_FID)) {
 872                 struct ofd_device       *ofd = ofd_exp(exp);
 873                 struct ofd_seq          *oseq;
 874                 struct lu_fid           *fid;
 875                 int                      rc;
 876
 877                 req_capsule_extend(tsi->tsi_pill, &RQF_OST_GET_INFO_LAST_FID);
 878                 rc = req_capsule_server_pack(tsi->tsi_pill);
 879                 if (rc)
 880                         RETURN(err_serious(rc));
 881
 882                 fid = req_capsule_client_get(tsi->tsi_pill, &RMF_FID);
 883                 if (fid == NULL)
 884                         RETURN(err_serious(-EPROTO));
 885
 886                 fid_le_to_cpu(&fti->fti_ostid.oi_fid, fid);
 887
 888                 fid = req_capsule_server_get(tsi->tsi_pill, &RMF_FID);
 889                 if (fid == NULL)
 890                         RETURN(-ENOMEM);
 891
 892                 oseq = ofd_seq_load(tsi->tsi_env, ofd,
 893                                     ostid_seq(&fti->fti_ostid));
 894                 if (IS_ERR(oseq))
 895                         RETURN(PTR_ERR(oseq));
 896
 897                 rc = ostid_to_fid(fid, &oseq->os_oi,
 898                                   ofd->ofd_lut.lut_lsd.lsd_osd_index);
 899                 if (rc != 0)
 900                         GOTO(out_put, rc);
 901
 902                 CDEBUG(D_HA, "%s: LAST FID is "DFID"\n", ofd_name(ofd),
 903                        PFID(fid));
 904 out_put:
 905                 ofd_seq_put(tsi->tsi_env, oseq);
 906         } else {
 907                 CERROR("%s: not supported key %s\n", tgt_name(tsi->tsi_tgt),
 908                        (char *)key);
 909                 rc = -EOPNOTSUPP;
 910         }
 911         ofd_counter_incr(tsi->tsi_exp, LPROC_OFD_STATS_GET_INFO,
 912                          tsi->tsi_jobid, 1);
 913
 914         RETURN(rc);
 915 }
 916
 917 static int ofd_getattr_hdl(struct tgt_session_info *tsi)
 918 {
 919         struct ofd_thread_info  *fti = tsi2ofd_info(tsi);
 920         struct ofd_device       *ofd = ofd_exp(tsi->tsi_exp);
 921         struct ost_body         *repbody;
 922         struct lustre_handle     lh = { 0 };
 923         struct ofd_object       *fo;
 924         __u64                    flags = 0;
 925         ldlm_mode_t              lock_mode = LCK_PR;
 926         bool                     srvlock;
 927         int                      rc;
 928         ENTRY;
 929
 930         LASSERT(tsi->tsi_ost_body != NULL);
 931
 932         repbody = req_capsule_server_get(tsi->tsi_pill, &RMF_OST_BODY);
 933         if (repbody == NULL)
 934                 RETURN(-ENOMEM);
 935
 936         repbody->oa.o_oi = tsi->tsi_ost_body->oa.o_oi;
 937         repbody->oa.o_valid = OBD_MD_FLID | OBD_MD_FLGROUP;
 938
 939         srvlock = tsi->tsi_ost_body->oa.o_valid & OBD_MD_FLFLAGS &&
 940                   tsi->tsi_ost_body->oa.o_flags & OBD_FL_SRVLOCK;
 941
 942         if (srvlock) {
 943                 if (unlikely(tsi->tsi_ost_body->oa.o_flags & OBD_FL_FLUSH))
 944                         lock_mode = LCK_PW;
 945
 946                 rc = tgt_extent_lock(tsi->tsi_tgt->lut_obd->obd_namespace,
 947                                      &tsi->tsi_resid, 0, OBD_OBJECT_EOF, &lh,
 948                                      lock_mode, &flags);
 949                 if (rc != 0)
 950                         RETURN(rc);
 951         }
 952
 953         fo = ofd_object_find_exists(tsi->tsi_env, ofd, &tsi->tsi_fid);
 954         if (IS_ERR(fo))
 955                 GOTO(out, rc = PTR_ERR(fo));
 956
 957         rc = ofd_attr_get(tsi->tsi_env, fo, &fti->fti_attr);
 958         if (rc == 0) {
 959                 __u64    curr_version;
 960
 961                 obdo_from_la(&repbody->oa, &fti->fti_attr,
 962                              OFD_VALID_FLAGS | LA_UID | LA_GID);
 963                 tgt_drop_id(tsi->tsi_exp, &repbody->oa);
 964
 965                 /* Store object version in reply */
 966                 curr_version = dt_version_get(tsi->tsi_env,
 967                                               ofd_object_child(fo));
 968                 if ((__s64)curr_version != -EOPNOTSUPP) {
 969                         repbody->oa.o_valid |= OBD_MD_FLDATAVERSION;
 970                         repbody->oa.o_data_version = curr_version;
 971                 }
 972         }
 973
 974         ofd_object_put(tsi->tsi_env, fo);
 975 out:
 976         if (srvlock)
 977                 tgt_extent_unlock(&lh, lock_mode);
 978
 979         ofd_counter_incr(tsi->tsi_exp, LPROC_OFD_STATS_GETATTR,
 980                          tsi->tsi_jobid, 1);
 981
 982         repbody->oa.o_valid |= OBD_MD_FLFLAGS;
 983         repbody->oa.o_flags = OBD_FL_FLUSH;
 984
 985         RETURN(rc);
 986 }
 987
 988 static int ofd_setattr_hdl(struct tgt_session_info *tsi)
 989 {
 990         struct ofd_thread_info  *fti = tsi2ofd_info(tsi);
 991         struct ofd_device       *ofd = ofd_exp(tsi->tsi_exp);
 992         struct ost_body         *body = tsi->tsi_ost_body;
 993         struct ost_body         *repbody;
 994         struct ldlm_resource    *res;
 995         struct ofd_object       *fo;
 996         struct filter_fid       *ff = NULL;
 997         int                      rc = 0;
 998
 999         ENTRY;
1000
1001         LASSERT(body != NULL);
1002
1003         repbody = req_capsule_server_get(tsi->tsi_pill, &RMF_OST_BODY);
1004         if (repbody == NULL)
1005                 RETURN(-ENOMEM);
1006
1007         repbody->oa.o_oi = body->oa.o_oi;
1008         repbody->oa.o_valid = OBD_MD_FLID | OBD_MD_FLGROUP;
1009
1010         /* This would be very bad - accidentally truncating a file when
1011          * changing the time or similar - bug 12203. */
1012         if (body->oa.o_valid & OBD_MD_FLSIZE &&
1013             body->oa.o_size != OBD_OBJECT_EOF) {
1014                 static char mdsinum[48];
1015
1016                 if (body->oa.o_valid & OBD_MD_FLFID)
1017                         snprintf(mdsinum, sizeof(mdsinum) - 1,
1018                                  "of parent "DFID, body->oa.o_parent_seq,
1019                                  body->oa.o_parent_oid, 0);
1020                 else
1021                         mdsinum[0] = '\0';
1022
1023                 CERROR("%s: setattr from %s is trying to truncate object "DFID
1024                        " %s\n", ofd_name(ofd), obd_export_nid2str(tsi->tsi_exp),
1025                        PFID(&tsi->tsi_fid), mdsinum);
1026                 RETURN(-EPERM);
1027         }
1028
1029         fo = ofd_object_find_exists(tsi->tsi_env, ofd, &tsi->tsi_fid);
1030         if (IS_ERR(fo))
1031                 GOTO(out, rc = PTR_ERR(fo));
1032
1033         la_from_obdo(&fti->fti_attr, &body->oa, body->oa.o_valid);
1034         fti->fti_attr.la_valid &= ~LA_TYPE;
1035
1036         if (body->oa.o_valid & OBD_MD_FLFID) {
1037                 ff = &fti->fti_mds_fid;
1038                 ofd_prepare_fidea(ff, &body->oa);
1039         }
1040
1041         /* setting objects attributes (including owner/group) */
1042         rc = ofd_attr_set(tsi->tsi_env, fo, &fti->fti_attr, ff);
1043         if (rc != 0)
1044                 GOTO(out_put, rc);
1045
1046         obdo_from_la(&repbody->oa, &fti->fti_attr,
1047                      OFD_VALID_FLAGS | LA_UID | LA_GID);
1048         tgt_drop_id(tsi->tsi_exp, &repbody->oa);
1049
1050         ofd_counter_incr(tsi->tsi_exp, LPROC_OFD_STATS_SETATTR,
1051                          tsi->tsi_jobid, 1);
1052         EXIT;
1053 out_put:
1054         ofd_object_put(tsi->tsi_env, fo);
1055 out:
1056         if (rc == 0) {
1057                 /* we do not call this before to avoid lu_object_find() in
1058                  *  ->lvbo_update() holding another reference on the object.
1059                  * otherwise concurrent destroy can make the object unavailable
1060                  * for 2nd lu_object_find() waiting for the first reference
1061                  * to go... deadlock! */
1062                 res = ldlm_resource_get(ofd->ofd_namespace, NULL,
1063                                         &tsi->tsi_resid, LDLM_EXTENT, 0);
1064                 if (res != NULL) {
1065                         ldlm_res_lvbo_update(res, NULL, 0);
1066                         ldlm_resource_putref(res);
1067                 }
1068         }
1069         return rc;
1070 }
1071
1072 static int ofd_create_hdl(struct tgt_session_info *tsi)
1073 {
1074         struct ost_body         *repbody;
1075         const struct obdo       *oa = &tsi->tsi_ost_body->oa;
1076         struct obdo             *rep_oa;
1077         struct ofd_device       *ofd = ofd_exp(tsi->tsi_exp);
1078         obd_seq                  seq = ostid_seq(&oa->o_oi);
1079         obd_id                   oid = ostid_id(&oa->o_oi);
1080         struct ofd_seq          *oseq;
1081         int                      rc = 0, diff;
1082         int                      sync_trans = 0;
1083
1084         ENTRY;
1085
1086         if (OBD_FAIL_CHECK(OBD_FAIL_OST_EROFS))
1087                 RETURN(-EROFS);
1088
1089         repbody = req_capsule_server_get(tsi->tsi_pill, &RMF_OST_BODY);
1090         if (repbody == NULL)
1091                 RETURN(-ENOMEM);
1092
1093         rep_oa = &repbody->oa;
1094         rep_oa->o_oi = oa->o_oi;
1095
1096         LASSERT(seq >= FID_SEQ_OST_MDT0);
1097         LASSERT(oa->o_valid & OBD_MD_FLGROUP);
1098
1099         CDEBUG(D_INFO, "ofd_create("DOSTID")\n", POSTID(&oa->o_oi));
1100
1101         oseq = ofd_seq_load(tsi->tsi_env, ofd, seq);
1102         if (IS_ERR(oseq)) {
1103                 CERROR("%s: Can't find FID Sequence "LPX64": rc = %ld\n",
1104                        ofd_name(ofd), seq, PTR_ERR(oseq));
1105                 RETURN(-EINVAL);
1106         }
1107
1108         if ((oa->o_valid & OBD_MD_FLFLAGS) &&
1109             (oa->o_flags & OBD_FL_RECREATE_OBJS)) {
1110                 if (!ofd_obd(ofd)->obd_recovering ||
1111                     oid > ofd_seq_last_oid(oseq)) {
1112                         CERROR("%s: recreate objid "DOSTID" > last id "LPU64
1113                                "\n", ofd_name(ofd), POSTID(&oa->o_oi),
1114                                ofd_seq_last_oid(oseq));
1115                         GOTO(out_nolock, rc = -EINVAL);
1116                 }
1117                 /* Do nothing here, we re-create objects during recovery
1118                  * upon write replay, see ofd_preprw_write() */
1119                 GOTO(out_nolock, rc = 0);
1120         }
1121         /* former ofd_handle_precreate */
1122         if ((oa->o_valid & OBD_MD_FLFLAGS) &&
1123             (oa->o_flags & OBD_FL_DELORPHAN)) {
1124                 /* destroy orphans */
1125                 if (lustre_msg_get_conn_cnt(tgt_ses_req(tsi)->rq_reqmsg) <
1126                     tsi->tsi_exp->exp_conn_cnt) {
1127                         CERROR("%s: dropping old orphan cleanup request\n",
1128                                ofd_name(ofd));
1129                         GOTO(out_nolock, rc = 0);
1130                 }
1131                 /* This causes inflight precreates to abort and drop lock */
1132                 oseq->os_destroys_in_progress = 1;
1133                 mutex_lock(&oseq->os_create_lock);
1134                 if (!oseq->os_destroys_in_progress) {
1135                         CERROR("%s:["LPU64"] destroys_in_progress already"
1136                                " cleared\n", ofd_name(ofd), seq);
1137                         ostid_set_id(&rep_oa->o_oi, ofd_seq_last_oid(oseq));
1138                         GOTO(out, rc = 0);
1139                 }
1140                 diff = oid - ofd_seq_last_oid(oseq);
1141                 CDEBUG(D_HA, "ofd_last_id() = "LPU64" -> diff = %d\n",
1142                         ofd_seq_last_oid(oseq), diff);
1143                 if (-diff > OST_MAX_PRECREATE) {
1144                         /* FIXME: should reset precreate_next_id on MDS */
1145                         rc = 0;
1146                 } else if (diff < 0) {
1147                         rc = ofd_orphans_destroy(tsi->tsi_env, tsi->tsi_exp,
1148                                                  ofd, rep_oa);
1149                         oseq->os_destroys_in_progress = 0;
1150                 } else {
1151                         /* XXX: Used by MDS for the first time! */
1152                         oseq->os_destroys_in_progress = 0;
1153                 }
1154         } else {
1155                 mutex_lock(&oseq->os_create_lock);
1156                 if (lustre_msg_get_conn_cnt(tgt_ses_req(tsi)->rq_reqmsg) <
1157                     tsi->tsi_exp->exp_conn_cnt) {
1158                         CERROR("%s: dropping old precreate request\n",
1159                                ofd_name(ofd));
1160                         GOTO(out, rc = 0);
1161                 }
1162                 /* only precreate if seq is 0, IDIF or normal and also o_id
1163                  * must be specfied */
1164                 if ((!fid_seq_is_mdt(seq) && !fid_seq_is_norm(seq) &&
1165                      !fid_seq_is_idif(seq)) || oid == 0) {
1166                         diff = 1; /* shouldn't we create this right now? */
1167                 } else {
1168                         diff = oid - ofd_seq_last_oid(oseq);
1169                         /* Do sync create if the seq is about to used up */
1170                         if (fid_seq_is_idif(seq) || fid_seq_is_mdt0(seq)) {
1171                                 if (unlikely(oid >= IDIF_MAX_OID - 1))
1172                                         sync_trans = 1;
1173                         } else if (fid_seq_is_norm(seq)) {
1174                                 if (unlikely(oid >=
1175                                              LUSTRE_DATA_SEQ_MAX_WIDTH - 1))
1176                                         sync_trans = 1;
1177                         } else {
1178                                 CERROR("%s : invalid o_seq "DOSTID"\n",
1179                                        ofd_name(ofd), POSTID(&oa->o_oi));
1180                                 GOTO(out, rc = -EINVAL);
1181                         }
1182                 }
1183         }
1184         if (diff > 0) {
1185                 cfs_time_t       enough_time = cfs_time_shift(DISK_TIMEOUT);
1186                 obd_id           next_id;
1187                 int              created = 0;
1188                 int              count;
1189
1190                 if (!(oa->o_valid & OBD_MD_FLFLAGS) ||
1191                     !(oa->o_flags & OBD_FL_DELORPHAN)) {
1192                         /* don't enforce grant during orphan recovery */
1193                         rc = ofd_grant_create(tsi->tsi_env,
1194                                               ofd_obd(ofd)->obd_self_export,
1195                                               &diff);
1196                         if (rc) {
1197                                 CDEBUG(D_HA, "%s: failed to acquire grant "
1198                                        "space for precreate (%d): rc = %d\n",
1199                                        ofd_name(ofd), diff, rc);
1200                                 diff = 0;
1201                         }
1202                 }
1203
1204                 /* This can happen if a new OST is formatted and installed
1205                  * in place of an old one at the same index.  Instead of
1206                  * precreating potentially millions of deleted old objects
1207                  * (possibly filling the OST), only precreate the last batch.
1208                  * LFSCK will eventually clean up any orphans. LU-14 */
1209                 if (diff > 5 * OST_MAX_PRECREATE) {
1210                         diff = OST_MAX_PRECREATE / 2;
1211                         LCONSOLE_WARN("%s: precreate FID "DOSTID" is over %u "
1212                                       "larger than the LAST_ID "DOSTID", only "
1213                                       "precreating the last %u objects.\n",
1214                                       ofd_name(ofd), POSTID(&oa->o_oi),
1215                                       5 * OST_MAX_PRECREATE,
1216                                       POSTID(&oseq->os_oi), diff);
1217                         ofd_seq_last_oid_set(oseq, ostid_id(&oa->o_oi) - diff);
1218                 }
1219
1220                 while (diff > 0) {
1221                         next_id = ofd_seq_last_oid(oseq) + 1;
1222                         count = ofd_precreate_batch(ofd, diff);
1223
1224                         CDEBUG(D_HA, "%s: reserve %d objects in group "LPX64
1225                                " at "LPU64"\n", ofd_name(ofd),
1226                                count, seq, next_id);
1227
1228                         if (cfs_time_after(jiffies, enough_time)) {
1229                                 LCONSOLE_WARN("%s: Slow creates, %d/%d objects"
1230                                               " created at a rate of %d/s\n",
1231                                               ofd_name(ofd), created,
1232                                               diff + created,
1233                                               created / DISK_TIMEOUT);
1234                                 break;
1235                         }
1236
1237                         rc = ofd_precreate_objects(tsi->tsi_env, ofd, next_id,
1238                                                    oseq, count, sync_trans);
1239                         if (rc > 0) {
1240                                 created += rc;
1241                                 diff -= rc;
1242                         } else if (rc < 0) {
1243                                 break;
1244                         }
1245                 }
1246                 if (created > 0)
1247                         /* some objects got created, we can return
1248                          * them, even if last creation failed */
1249                         rc = 0;
1250                 else
1251                         CERROR("%s: unable to precreate: rc = %d\n",
1252                                ofd_name(ofd), rc);
1253
1254                 if (!(oa->o_valid & OBD_MD_FLFLAGS) ||
1255                     !(oa->o_flags & OBD_FL_DELORPHAN))
1256                         ofd_grant_commit(tsi->tsi_env,
1257                                          ofd_obd(ofd)->obd_self_export, rc);
1258
1259                 ostid_set_id(&rep_oa->o_oi, ofd_seq_last_oid(oseq));
1260         }
1261         EXIT;
1262         ofd_counter_incr(tsi->tsi_exp, LPROC_OFD_STATS_CREATE,
1263                          tsi->tsi_jobid, 1);
1264 out:
1265         mutex_unlock(&oseq->os_create_lock);
1266 out_nolock:
1267         if (rc == 0)
1268                 rep_oa->o_valid |= OBD_MD_FLID | OBD_MD_FLGROUP;
1269
1270         ofd_seq_put(tsi->tsi_env, oseq);
1271         return rc;
1272 }
1273
1274 static int ofd_destroy_hdl(struct tgt_session_info *tsi)
1275 {
1276         const struct ost_body   *body = tsi->tsi_ost_body;
1277         struct ost_body         *repbody;
1278         struct ofd_device       *ofd = ofd_exp(tsi->tsi_exp);
1279         struct ofd_thread_info  *fti = tsi2ofd_info(tsi);
1280         obd_count                count;
1281         int                      rc = 0;
1282
1283         ENTRY;
1284
1285         if (OBD_FAIL_CHECK(OBD_FAIL_OST_EROFS))
1286                 RETURN(-EROFS);
1287
1288         /* This is old case for clients before Lustre 2.4 */
1289         /* If there's a DLM request, cancel the locks mentioned in it */
1290         if (req_capsule_field_present(tsi->tsi_pill, &RMF_DLM_REQ,
1291                                       RCL_CLIENT)) {
1292                 struct ldlm_request *dlm;
1293
1294                 dlm = req_capsule_client_get(tsi->tsi_pill, &RMF_DLM_REQ);
1295                 if (dlm == NULL)
1296                         RETURN(-EFAULT);
1297                 ldlm_request_cancel(tgt_ses_req(tsi), dlm, 0);
1298         }
1299
1300         repbody = req_capsule_server_get(tsi->tsi_pill, &RMF_OST_BODY);
1301         repbody->oa.o_oi = body->oa.o_oi;
1302
1303         /* check that o_misc makes sense */
1304         if (body->oa.o_valid & OBD_MD_FLOBJCOUNT)
1305                 count = body->oa.o_misc;
1306         else
1307                 count = 1; /* default case - single destroy */
1308
1309         CDEBUG(D_HA, "%s: Destroy object "DOSTID" count %d\n", ofd_name(ofd),
1310                POSTID(&body->oa.o_oi), count);
1311         while (count > 0) {
1312                 int lrc;
1313
1314                 lrc = ostid_to_fid(&fti->fti_fid, &repbody->oa.o_oi, 0);
1315                 if (lrc != 0) {
1316                         if (rc == 0)
1317                                 rc = lrc;
1318                         GOTO(out, rc);
1319                 }
1320                 lrc = ofd_destroy_by_fid(tsi->tsi_env, ofd, &fti->fti_fid, 0);
1321                 if (lrc == -ENOENT) {
1322                         CDEBUG(D_INODE,
1323                                "%s: destroying non-existent object "DFID"\n",
1324                                ofd_name(ofd), PFID(&fti->fti_fid));
1325                         /* rewrite rc with -ENOENT only if it is 0 */
1326                         if (rc == 0)
1327                                 rc = lrc;
1328                 } else if (lrc != 0) {
1329                         CERROR("%s: error destroying object "DFID": %d\n",
1330                                ofd_name(ofd), PFID(&fti->fti_fid),
1331                                rc);
1332                         rc = lrc;
1333                 }
1334                 count--;
1335                 ostid_inc_id(&repbody->oa.o_oi);
1336         }
1337
1338         ofd_counter_incr(tsi->tsi_exp, LPROC_OFD_STATS_DESTROY,
1339                          tsi->tsi_jobid, 1);
1340 out:
1341         RETURN(rc);
1342 }
1343
1344 static int ofd_statfs_hdl(struct tgt_session_info *tsi)
1345 {
1346         struct obd_statfs       *osfs;
1347         int                      rc;
1348
1349         ENTRY;
1350
1351         osfs = req_capsule_server_get(tsi->tsi_pill, &RMF_OBD_STATFS);
1352
1353         rc = ofd_statfs(tsi->tsi_env, tsi->tsi_exp, osfs,
1354                         cfs_time_shift_64(-OBD_STATFS_CACHE_SECONDS), 0);
1355         if (rc != 0)
1356                 CERROR("%s: statfs failed: rc = %d\n",
1357                        tgt_name(tsi->tsi_tgt), rc);
1358
1359         if (OBD_FAIL_CHECK(OBD_FAIL_OST_STATFS_EINPROGRESS))
1360                 rc = -EINPROGRESS;
1361
1362         ofd_counter_incr(tsi->tsi_exp, LPROC_OFD_STATS_STATFS,
1363                          tsi->tsi_jobid, 1);
1364
1365         RETURN(rc);
1366 }
1367
1368 static int ofd_sync_hdl(struct tgt_session_info *tsi)
1369 {
1370         struct ost_body         *body = tsi->tsi_ost_body;
1371         struct ost_body         *repbody;
1372         struct ofd_thread_info  *fti = tsi2ofd_info(tsi);
1373         struct ofd_device       *ofd = ofd_exp(tsi->tsi_exp);
1374         struct ofd_object       *fo = NULL;
1375         int                      rc = 0;
1376
1377         ENTRY;
1378
1379         repbody = req_capsule_server_get(tsi->tsi_pill, &RMF_OST_BODY);
1380
1381         /* if no objid is specified, it means "sync whole filesystem" */
1382         if (!fid_is_zero(&tsi->tsi_fid)) {
1383                 fo = ofd_object_find_exists(tsi->tsi_env, ofd, &tsi->tsi_fid);
1384                 if (IS_ERR(fo))
1385                         RETURN(PTR_ERR(fo));
1386         }
1387
1388         rc = tgt_sync(tsi->tsi_env, tsi->tsi_tgt,
1389                       fo != NULL ? ofd_object_child(fo) : NULL);
1390         if (rc)
1391                 GOTO(put, rc);
1392
1393         ofd_counter_incr(tsi->tsi_exp, LPROC_OFD_STATS_SYNC,
1394                          tsi->tsi_jobid, 1);
1395         if (fo == NULL)
1396                 RETURN(0);
1397
1398         repbody->oa.o_oi = body->oa.o_oi;
1399         repbody->oa.o_valid = OBD_MD_FLID | OBD_MD_FLGROUP;
1400
1401         rc = ofd_attr_get(tsi->tsi_env, fo, &fti->fti_attr);
1402         if (rc == 0)
1403                 obdo_from_la(&repbody->oa, &fti->fti_attr,
1404                              OFD_VALID_FLAGS);
1405         else
1406                 /* don't return rc from getattr */
1407                 rc = 0;
1408         EXIT;
1409 put:
1410         if (fo != NULL)
1411                 ofd_object_put(tsi->tsi_env, fo);
1412         return rc;
1413 }
1414
1415 static int ofd_punch_hdl(struct tgt_session_info *tsi)
1416 {
1417         const struct obdo       *oa = &tsi->tsi_ost_body->oa;
1418         struct ost_body         *repbody;
1419         struct ofd_thread_info  *info = tsi2ofd_info(tsi);
1420         struct ldlm_namespace   *ns = tsi->tsi_tgt->lut_obd->obd_namespace;
1421         struct ldlm_resource    *res;
1422         struct ofd_object       *fo;
1423         struct filter_fid       *ff = NULL;
1424         __u64                    flags = 0;
1425         struct lustre_handle     lh = { 0, };
1426         int                      rc;
1427         __u64                    start, end;
1428         bool                     srvlock;
1429
1430         ENTRY;
1431
1432         /* check that we do support OBD_CONNECT_TRUNCLOCK. */
1433         CLASSERT(OST_CONNECT_SUPPORTED & OBD_CONNECT_TRUNCLOCK);
1434
1435         if ((oa->o_valid & (OBD_MD_FLSIZE | OBD_MD_FLBLOCKS)) !=
1436             (OBD_MD_FLSIZE | OBD_MD_FLBLOCKS))
1437                 RETURN(err_serious(-EPROTO));
1438
1439         repbody = req_capsule_server_get(tsi->tsi_pill, &RMF_OST_BODY);
1440         if (repbody == NULL)
1441                 RETURN(err_serious(-ENOMEM));
1442
1443         /* punch start,end are passed in o_size,o_blocks throught wire */
1444         start = oa->o_size;
1445         end = oa->o_blocks;
1446
1447         if (end != OBD_OBJECT_EOF) /* Only truncate is supported */
1448                 RETURN(-EPROTO);
1449
1450         /* standard truncate optimization: if file body is completely
1451          * destroyed, don't send data back to the server. */
1452         if (start == 0)
1453                 flags |= LDLM_FL_AST_DISCARD_DATA;
1454
1455         repbody->oa.o_oi = oa->o_oi;
1456         repbody->oa.o_valid = OBD_MD_FLID;
1457
1458         srvlock = oa->o_valid & OBD_MD_FLFLAGS &&
1459                   oa->o_flags & OBD_FL_SRVLOCK;
1460
1461         if (srvlock) {
1462                 rc = tgt_extent_lock(ns, &tsi->tsi_resid, start, end, &lh,
1463                                      LCK_PW, &flags);
1464                 if (rc != 0)
1465                         RETURN(rc);
1466         }
1467
1468         CDEBUG(D_INODE, "calling punch for object "DFID", valid = "LPX64
1469                ", start = "LPD64", end = "LPD64"\n", PFID(&tsi->tsi_fid),
1470                oa->o_valid, start, end);
1471
1472         fo = ofd_object_find_exists(tsi->tsi_env, ofd_exp(tsi->tsi_exp),
1473                                     &tsi->tsi_fid);
1474         if (IS_ERR(fo))
1475                 GOTO(out, rc = PTR_ERR(fo));
1476
1477         la_from_obdo(&info->fti_attr, oa,
1478                      OBD_MD_FLMTIME | OBD_MD_FLATIME | OBD_MD_FLCTIME);
1479         info->fti_attr.la_size = start;
1480         info->fti_attr.la_valid |= LA_SIZE;
1481
1482         if (oa->o_valid & OBD_MD_FLFID) {
1483                 ff = &info->fti_mds_fid;
1484                 ofd_prepare_fidea(ff, oa);
1485         }
1486
1487         rc = ofd_object_punch(tsi->tsi_env, fo, start, end, &info->fti_attr,
1488                               ff);
1489         if (rc)
1490                 GOTO(out_put, rc);
1491
1492         ofd_counter_incr(tsi->tsi_exp, LPROC_OFD_STATS_PUNCH,
1493                          tsi->tsi_jobid, 1);
1494         EXIT;
1495 out_put:
1496         ofd_object_put(tsi->tsi_env, fo);
1497 out:
1498         if (srvlock)
1499                 tgt_extent_unlock(&lh, LCK_PW);
1500         if (rc == 0) {
1501                 /* we do not call this before to avoid lu_object_find() in
1502                  *  ->lvbo_update() holding another reference on the object.
1503                  * otherwise concurrent destroy can make the object unavailable
1504                  * for 2nd lu_object_find() waiting for the first reference
1505                  * to go... deadlock! */
1506                 res = ldlm_resource_get(ns, NULL, &tsi->tsi_resid,
1507                                         LDLM_EXTENT, 0);
1508                 if (res != NULL) {
1509                         ldlm_res_lvbo_update(res, NULL, 0);
1510                         ldlm_resource_putref(res);
1511                 }
1512         }
1513         return rc;
1514 }
1515
1516
1517 static int ofd_quotactl(struct tgt_session_info *tsi)
1518 {
1519         struct obd_quotactl     *oqctl, *repoqc;
1520         int                      rc;
1521
1522         ENTRY;
1523
1524         oqctl = req_capsule_client_get(tsi->tsi_pill, &RMF_OBD_QUOTACTL);
1525         if (oqctl == NULL)
1526                 RETURN(err_serious(-EPROTO));
1527
1528         repoqc = req_capsule_server_get(tsi->tsi_pill, &RMF_OBD_QUOTACTL);
1529         if (repoqc == NULL)
1530                 RETURN(err_serious(-ENOMEM));
1531
1532         /* report success for quota on/off for interoperability with current MDT
1533          * stack */
1534         if (oqctl->qc_cmd == Q_QUOTAON || oqctl->qc_cmd == Q_QUOTAOFF)
1535                 RETURN(0);
1536
1537         *repoqc = *oqctl;
1538         rc = lquotactl_slv(tsi->tsi_env, tsi->tsi_tgt->lut_bottom, repoqc);
1539
1540         ofd_counter_incr(tsi->tsi_exp, LPROC_OFD_STATS_QUOTACTL,
1541                          tsi->tsi_jobid, 1);
1542
1543         RETURN(rc);
1544 }
1545
1546 #define OBD_FAIL_OST_READ_NET   OBD_FAIL_OST_BRW_NET
1547 #define OBD_FAIL_OST_WRITE_NET  OBD_FAIL_OST_BRW_NET
1548 #define OST_BRW_READ    OST_READ
1549 #define OST_BRW_WRITE   OST_WRITE
1550
1551 static struct tgt_handler ofd_tgt_handlers[] = {
1552 TGT_RPC_HANDLER(OST_FIRST_OPC,
1553                 0,                      OST_CONNECT,    tgt_connect,
1554                 &RQF_CONNECT, LUSTRE_OBD_VERSION),
1555 TGT_RPC_HANDLER(OST_FIRST_OPC,
1556                 0,                      OST_DISCONNECT, tgt_disconnect,
1557                 &RQF_OST_DISCONNECT, LUSTRE_OBD_VERSION),
1558 TGT_RPC_HANDLER(OST_FIRST_OPC,
1559                 0,                      OST_SET_INFO,   ofd_set_info_hdl,
1560                 &RQF_OBD_SET_INFO, LUSTRE_OST_VERSION),
1561 TGT_OST_HDL(0,                          OST_GET_INFO,   ofd_get_info_hdl),
1562 TGT_OST_HDL(HABEO_CORPUS| HABEO_REFERO, OST_GETATTR,    ofd_getattr_hdl),
1563 TGT_OST_HDL(HABEO_CORPUS| HABEO_REFERO | MUTABOR,
1564                                         OST_SETATTR,    ofd_setattr_hdl),
1565 TGT_OST_HDL(0           | HABEO_REFERO | MUTABOR,
1566                                         OST_CREATE,     ofd_create_hdl),
1567 TGT_OST_HDL(0           | HABEO_REFERO | MUTABOR,
1568                                         OST_DESTROY,    ofd_destroy_hdl),
1569 TGT_OST_HDL(0           | HABEO_REFERO, OST_STATFS,     ofd_statfs_hdl),
1570 TGT_OST_HDL(HABEO_CORPUS| HABEO_REFERO, OST_BRW_READ,   tgt_brw_read),
1571 /* don't set CORPUS flag for brw_write because -ENOENT may be valid case */
1572 TGT_OST_HDL(MUTABOR,                    OST_BRW_WRITE,  tgt_brw_write),
1573 TGT_OST_HDL(HABEO_CORPUS| HABEO_REFERO | MUTABOR,
1574                                         OST_PUNCH,      ofd_punch_hdl),
1575 TGT_OST_HDL(HABEO_CORPUS| HABEO_REFERO, OST_SYNC,       ofd_sync_hdl),
1576 TGT_OST_HDL(0           | HABEO_REFERO, OST_QUOTACTL,   ofd_quotactl),
1577 };
1578
1579 static struct tgt_opc_slice ofd_common_slice[] = {
1580         {
1581                 .tos_opc_start  = OST_FIRST_OPC,
1582                 .tos_opc_end    = OST_LAST_OPC,
1583                 .tos_hs         = ofd_tgt_handlers
1584         },
1585         {
1586                 .tos_opc_start  = OBD_FIRST_OPC,
1587                 .tos_opc_end    = OBD_LAST_OPC,
1588                 .tos_hs         = tgt_obd_handlers
1589         },
1590         {
1591                 .tos_opc_start  = LDLM_FIRST_OPC,
1592                 .tos_opc_end    = LDLM_LAST_OPC,
1593                 .tos_hs         = tgt_dlm_handlers
1594         },
1595         {
1596                 .tos_opc_start  = UPDATE_OBJ,
1597                 .tos_opc_end    = UPDATE_LAST_OPC,
1598                 .tos_hs         = tgt_out_handlers
1599         },
1600         {
1601                 .tos_opc_start  = SEQ_FIRST_OPC,
1602                 .tos_opc_end    = SEQ_LAST_OPC,
1603                 .tos_hs         = seq_handlers
1604         },
1605         {
1606                 .tos_hs         = NULL
1607         }
1608 };
1609
1610 static int ofd_init0(const struct lu_env *env, struct ofd_device *m,
1611                      struct lu_device_type *ldt, struct lustre_cfg *cfg)
1612 {
1613         const char              *dev = lustre_cfg_string(cfg, 0);
1614         struct ofd_thread_info  *info = NULL;
1615         struct obd_device       *obd;
1616         struct obd_statfs       *osfs;
1617         int                      rc;
1618
1619         ENTRY;
1620
1621         obd = class_name2obd(dev);
1622         if (obd == NULL) {
1623                 CERROR("Cannot find obd with name %s\n", dev);
1624                 RETURN(-ENODEV);
1625         }
1626
1627         rc = lu_env_refill((struct lu_env *)env);
1628         if (rc != 0)
1629                 RETURN(rc);
1630
1631         obd->u.obt.obt_magic = OBT_MAGIC;
1632
1633         m->ofd_fmd_max_num = OFD_FMD_MAX_NUM_DEFAULT;
1634         m->ofd_fmd_max_age = OFD_FMD_MAX_AGE_DEFAULT;
1635
1636         spin_lock_init(&m->ofd_flags_lock);
1637         m->ofd_raid_degraded = 0;
1638         m->ofd_syncjournal = 0;
1639         ofd_slc_set(m);
1640         m->ofd_grant_compat_disable = 0;
1641
1642         /* statfs data */
1643         spin_lock_init(&m->ofd_osfs_lock);
1644         m->ofd_osfs_age = cfs_time_shift_64(-1000);
1645         m->ofd_osfs_unstable = 0;
1646         m->ofd_statfs_inflight = 0;
1647         m->ofd_osfs_inflight = 0;
1648
1649         /* grant data */
1650         spin_lock_init(&m->ofd_grant_lock);
1651         m->ofd_tot_dirty = 0;
1652         m->ofd_tot_granted = 0;
1653         m->ofd_tot_pending = 0;
1654         m->ofd_seq_count = 0;
1655
1656         spin_lock_init(&m->ofd_batch_lock);
1657         rwlock_init(&obd->u.filter.fo_sptlrpc_lock);
1658         sptlrpc_rule_set_init(&obd->u.filter.fo_sptlrpc_rset);
1659
1660         obd->u.filter.fo_fl_oss_capa = 0;
1661         CFS_INIT_LIST_HEAD(&obd->u.filter.fo_capa_keys);
1662         obd->u.filter.fo_capa_hash = init_capa_hash();
1663         if (obd->u.filter.fo_capa_hash == NULL)
1664                 RETURN(-ENOMEM);
1665
1666         m->ofd_dt_dev.dd_lu_dev.ld_ops = &ofd_lu_ops;
1667         m->ofd_dt_dev.dd_lu_dev.ld_obd = obd;
1668         /* set this lu_device to obd, because error handling need it */
1669         obd->obd_lu_dev = &m->ofd_dt_dev.dd_lu_dev;
1670
1671         rc = ofd_procfs_init(m);
1672         if (rc) {
1673                 CERROR("Can't init ofd lprocfs, rc %d\n", rc);
1674                 RETURN(rc);
1675         }
1676
1677         /* No connection accepted until configurations will finish */
1678         spin_lock(&obd->obd_dev_lock);
1679         obd->obd_no_conn = 1;
1680         spin_unlock(&obd->obd_dev_lock);
1681         obd->obd_replayable = 1;
1682         if (cfg->lcfg_bufcount > 4 && LUSTRE_CFG_BUFLEN(cfg, 4) > 0) {
1683                 char *str = lustre_cfg_string(cfg, 4);
1684
1685                 if (strchr(str, 'n')) {
1686                         CWARN("%s: recovery disabled\n", obd->obd_name);
1687                         obd->obd_replayable = 0;
1688                 }
1689         }
1690
1691         info = ofd_info_init(env, NULL);
1692         if (info == NULL)
1693                 RETURN(-EFAULT);
1694
1695         rc = ofd_stack_init(env, m, cfg);
1696         if (rc) {
1697                 CERROR("Can't init device stack, rc %d\n", rc);
1698                 GOTO(err_fini_proc, rc);
1699         }
1700
1701         ofd_procfs_add_brw_stats_symlink(m);
1702
1703         /* populate cached statfs data */
1704         osfs = &ofd_info(env)->fti_u.osfs;
1705         rc = ofd_statfs_internal(env, m, osfs, 0, NULL);
1706         if (rc != 0) {
1707                 CERROR("%s: can't get statfs data, rc %d\n", obd->obd_name, rc);
1708                 GOTO(err_fini_stack, rc);
1709         }
1710         if (!IS_PO2(osfs->os_bsize)) {
1711                 CERROR("%s: blocksize (%d) is not a power of 2\n",
1712                                 obd->obd_name, osfs->os_bsize);
1713                 GOTO(err_fini_stack, rc = -EPROTO);
1714         }
1715         m->ofd_blockbits = fls(osfs->os_bsize) - 1;
1716
1717         m->ofd_precreate_batch = OFD_PRECREATE_BATCH_DEFAULT;
1718         if (osfs->os_bsize * osfs->os_blocks < OFD_PRECREATE_SMALL_FS)
1719                 m->ofd_precreate_batch = OFD_PRECREATE_BATCH_SMALL;
1720
1721         snprintf(info->fti_u.name, sizeof(info->fti_u.name), "%s-%s",
1722                  "filter"/*LUSTRE_OST_NAME*/, obd->obd_uuid.uuid);
1723         m->ofd_namespace = ldlm_namespace_new(obd, info->fti_u.name,
1724                                               LDLM_NAMESPACE_SERVER,
1725                                               LDLM_NAMESPACE_GREEDY,
1726                                               LDLM_NS_TYPE_OST);
1727         if (m->ofd_namespace == NULL)
1728                 GOTO(err_fini_stack, rc = -ENOMEM);
1729         /* set obd_namespace for compatibility with old code */
1730         obd->obd_namespace = m->ofd_namespace;
1731         ldlm_register_intent(m->ofd_namespace, ofd_intent_policy);
1732         m->ofd_namespace->ns_lvbo = &ofd_lvbo;
1733         m->ofd_namespace->ns_lvbp = m;
1734
1735         ptlrpc_init_client(LDLM_CB_REQUEST_PORTAL, LDLM_CB_REPLY_PORTAL,
1736                            "filter_ldlm_cb_client", &obd->obd_ldlm_client);
1737
1738         dt_conf_get(env, m->ofd_osd, &m->ofd_dt_conf);
1739
1740         /* Allow at most ddp_grant_reserved% of the available filesystem space
1741          * to be granted to clients, so that any errors in the grant overhead
1742          * calculations do not allow granting more space to clients than can be
1743          * written. Assumes that in aggregate the grant overhead calculations do
1744          * not have more than ddp_grant_reserved% estimation error in them. */
1745         m->ofd_grant_ratio =
1746                 ofd_grant_ratio_conv(m->ofd_dt_conf.ddp_grant_reserved);
1747
1748         rc = tgt_init(env, &m->ofd_lut, obd, m->ofd_osd, ofd_common_slice,
1749                       OBD_FAIL_OST_ALL_REQUEST_NET,
1750                       OBD_FAIL_OST_ALL_REPLY_NET);
1751         if (rc)
1752                 GOTO(err_free_ns, rc);
1753
1754         rc = ofd_fs_setup(env, m, obd);
1755         if (rc)
1756                 GOTO(err_fini_lut, rc);
1757
1758         RETURN(0);
1759 err_fini_lut:
1760         tgt_fini(env, &m->ofd_lut);
1761 err_free_ns:
1762         ldlm_namespace_free(m->ofd_namespace, 0, obd->obd_force);
1763         obd->obd_namespace = m->ofd_namespace = NULL;
1764 err_fini_stack:
1765         ofd_stack_fini(env, m, &m->ofd_osd->dd_lu_dev);
1766 err_fini_proc:
1767         ofd_procfs_fini(m);
1768         return rc;
1769 }
1770
1771 static void ofd_fini(const struct lu_env *env, struct ofd_device *m)
1772 {
1773         struct obd_device *obd = ofd_obd(m);
1774         struct lu_device  *d = &m->ofd_dt_dev.dd_lu_dev;
1775
1776         lfsck_stop(env, m->ofd_osd, true);
1777         lfsck_degister(env, m->ofd_osd);
1778         target_recovery_fini(obd);
1779         obd_exports_barrier(obd);
1780         obd_zombie_barrier();
1781
1782         tgt_fini(env, &m->ofd_lut);
1783         ofd_fs_cleanup(env, m);
1784
1785         ofd_free_capa_keys(m);
1786         cleanup_capa_hash(obd->u.filter.fo_capa_hash);
1787
1788         if (m->ofd_namespace != NULL) {
1789                 ldlm_namespace_free(m->ofd_namespace, NULL,
1790                                     d->ld_obd->obd_force);
1791                 d->ld_obd->obd_namespace = m->ofd_namespace = NULL;
1792         }
1793
1794         ofd_stack_fini(env, m, &m->ofd_dt_dev.dd_lu_dev);
1795         ofd_procfs_fini(m);
1796         LASSERT(cfs_atomic_read(&d->ld_ref) == 0);
1797         server_put_mount(obd->obd_name);
1798         EXIT;
1799 }
1800
1801 static struct lu_device *ofd_device_fini(const struct lu_env *env,
1802                                          struct lu_device *d)
1803 {
1804         ENTRY;
1805         ofd_fini(env, ofd_dev(d));
1806         RETURN(NULL);
1807 }
1808
1809 static struct lu_device *ofd_device_free(const struct lu_env *env,
1810                                          struct lu_device *d)
1811 {
1812         struct ofd_device *m = ofd_dev(d);
1813
1814         dt_device_fini(&m->ofd_dt_dev);
1815         OBD_FREE_PTR(m);
1816         RETURN(NULL);
1817 }
1818
1819 static struct lu_device *ofd_device_alloc(const struct lu_env *env,
1820                                           struct lu_device_type *t,
1821                                           struct lustre_cfg *cfg)
1822 {
1823         struct ofd_device *m;
1824         struct lu_device  *l;
1825         int                rc;
1826
1827         OBD_ALLOC_PTR(m);
1828         if (m == NULL)
1829                 return ERR_PTR(-ENOMEM);
1830
1831         l = &m->ofd_dt_dev.dd_lu_dev;
1832         dt_device_init(&m->ofd_dt_dev, t);
1833         rc = ofd_init0(env, m, t, cfg);
1834         if (rc != 0) {
1835                 ofd_device_free(env, l);
1836                 l = ERR_PTR(rc);
1837         }
1838
1839         return l;
1840 }
1841
1842 /* thread context key constructor/destructor */
1843 LU_KEY_INIT_FINI(ofd, struct ofd_thread_info);
1844
1845 static void ofd_key_exit(const struct lu_context *ctx,
1846                          struct lu_context_key *key, void *data)
1847 {
1848         struct ofd_thread_info *info = data;
1849
1850         info->fti_env = NULL;
1851         info->fti_exp = NULL;
1852
1853         info->fti_xid = 0;
1854         info->fti_pre_version = 0;
1855         info->fti_used = 0;
1856
1857         memset(&info->fti_attr, 0, sizeof info->fti_attr);
1858 }
1859
1860 struct lu_context_key ofd_thread_key = {
1861         .lct_tags = LCT_DT_THREAD,
1862         .lct_init = ofd_key_init,
1863         .lct_fini = ofd_key_fini,
1864         .lct_exit = ofd_key_exit
1865 };
1866
1867 /* type constructor/destructor: mdt_type_init, mdt_type_fini */
1868 LU_TYPE_INIT_FINI(ofd, &ofd_thread_key);
1869
1870 static struct lu_device_type_operations ofd_device_type_ops = {
1871         .ldto_init              = ofd_type_init,
1872         .ldto_fini              = ofd_type_fini,
1873
1874         .ldto_start             = ofd_type_start,
1875         .ldto_stop              = ofd_type_stop,
1876
1877         .ldto_device_alloc      = ofd_device_alloc,
1878         .ldto_device_free       = ofd_device_free,
1879         .ldto_device_fini       = ofd_device_fini
1880 };
1881
1882 static struct lu_device_type ofd_device_type = {
1883         .ldt_tags       = LU_DEVICE_DT,
1884         .ldt_name       = LUSTRE_OST_NAME,
1885         .ldt_ops        = &ofd_device_type_ops,
1886         .ldt_ctx_tags   = LCT_DT_THREAD
1887 };
1888
1889 int __init ofd_init(void)
1890 {
1891         struct lprocfs_static_vars      lvars;
1892         int                             rc;
1893
1894         rc = lu_kmem_init(ofd_caches);
1895         if (rc)
1896                 return rc;
1897
1898         rc = ofd_fmd_init();
1899         if (rc) {
1900                 lu_kmem_fini(ofd_caches);
1901                 return(rc);
1902         }
1903
1904         lprocfs_ofd_init_vars(&lvars);
1905
1906         rc = class_register_type(&ofd_obd_ops, NULL, NULL,
1907 #ifndef HAVE_ONLY_PROCFS_SEQ
1908                                 lvars.module_vars,
1909 #endif
1910                                 LUSTRE_OST_NAME, &ofd_device_type);
1911         return rc;
1912 }
1913
1914 void __exit ofd_exit(void)
1915 {
1916         ofd_fmd_exit();
1917         lu_kmem_fini(ofd_caches);
1918         class_unregister_type(LUSTRE_OST_NAME);
1919 }
1920
1921 MODULE_AUTHOR("Whamcloud, Inc. <http://www.whamcloud.com/>");
1922 MODULE_DESCRIPTION("Lustre Object Filtering Device");
1923 MODULE_LICENSE("GPL");
1924
1925 module_init(ofd_init);
1926 module_exit(ofd_exit);