lustre/ofd/ofd_fs.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, 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_fs.c
  37  *
  38  * Author: Alexey Zhuravlev <bzzz@whamcloud.com>
  39  * Author: Mikhail Pershin <tappro@whamcloud.com>
  40  */
  41
  42 #define DEBUG_SUBSYSTEM S_FILTER
  43
  44 #include "ofd_internal.h"
  45
  46 int ofd_record_write(const struct lu_env *env, struct ofd_device *ofd,
  47                      struct dt_object *dt, struct lu_buf *buf, loff_t *off)
  48 {
  49         struct thandle  *th;
  50         int              rc;
  51
  52         ENTRY;
  53
  54         LASSERT(dt);
  55
  56         th = dt_trans_create(env, ofd->ofd_osd);
  57         if (IS_ERR(th))
  58                 RETURN(PTR_ERR(th));
  59
  60         rc = dt_declare_record_write(env, dt, buf->lb_len, *off, th);
  61         if (rc == 0) {
  62                 rc = dt_trans_start_local(env, ofd->ofd_osd, th);
  63                 if (rc == 0)
  64                         rc = dt_record_write(env, dt, buf, off, th);
  65         }
  66         dt_trans_stop(env, ofd->ofd_osd, th);
  67
  68         RETURN(rc);
  69 }
  70
  71 int ofd_precreate_batch(struct ofd_device *ofd, int batch)
  72 {
  73         int count;
  74
  75         spin_lock(&ofd->ofd_batch_lock);
  76         count = min(ofd->ofd_precreate_batch, batch);
  77         spin_unlock(&ofd->ofd_batch_lock);
  78
  79         return count;
  80 }
  81
  82 struct ofd_seq *ofd_seq_get(struct ofd_device *ofd, obd_seq seq)
  83 {
  84         struct ofd_seq *oseq;
  85
  86         read_lock(&ofd->ofd_seq_list_lock);
  87         cfs_list_for_each_entry(oseq, &ofd->ofd_seq_list, os_list) {
  88                 if (oseq->os_seq == seq) {
  89                         cfs_atomic_inc(&oseq->os_refc);
  90                         read_unlock(&ofd->ofd_seq_list_lock);
  91                         return oseq;
  92                 }
  93         }
  94         read_unlock(&ofd->ofd_seq_list_lock);
  95         return NULL;
  96 }
  97
  98 static void ofd_seq_destroy(const struct lu_env *env,
  99                             struct ofd_seq *oseq)
 100 {
 101         LASSERT(cfs_list_empty(&oseq->os_list));
 102         LASSERT(oseq->os_lastid_obj != NULL);
 103         lu_object_put(env, &oseq->os_lastid_obj->do_lu);
 104         OBD_FREE_PTR(oseq);
 105 }
 106
 107 void ofd_seq_put(const struct lu_env *env, struct ofd_seq *oseq)
 108 {
 109         if (cfs_atomic_dec_and_test(&oseq->os_refc))
 110                 ofd_seq_destroy(env, oseq);
 111 }
 112
 113 static void ofd_seq_delete(const struct lu_env *env, struct ofd_seq *oseq)
 114 {
 115         cfs_list_del_init(&oseq->os_list);
 116         ofd_seq_put(env, oseq);
 117 }
 118
 119 /**
 120  * Add a new sequence to the OFD device.
 121  *
 122  * \param ofd OFD device
 123  * \param new_seq new sequence to be added
 124  *
 125  * \retval the seq to be added or the existing seq
 126  **/
 127 static struct ofd_seq *ofd_seq_add(const struct lu_env *env,
 128                                    struct ofd_device *ofd,
 129                                    struct ofd_seq *new_seq)
 130 {
 131         struct ofd_seq *os = NULL;
 132
 133         write_lock(&ofd->ofd_seq_list_lock);
 134         cfs_list_for_each_entry(os, &ofd->ofd_seq_list, os_list) {
 135                 if (os->os_seq == new_seq->os_seq) {
 136                         cfs_atomic_inc(&os->os_refc);
 137                         write_unlock(&ofd->ofd_seq_list_lock);
 138                         /* The seq has not been added to the list */
 139                         ofd_seq_put(env, new_seq);
 140                         return os;
 141                 }
 142         }
 143         cfs_atomic_inc(&new_seq->os_refc);
 144         cfs_list_add_tail(&new_seq->os_list, &ofd->ofd_seq_list);
 145         write_unlock(&ofd->ofd_seq_list_lock);
 146         return new_seq;
 147 }
 148
 149 obd_id ofd_seq_last_oid(struct ofd_seq *oseq)
 150 {
 151         obd_id id;
 152
 153         spin_lock(&oseq->os_last_oid_lock);
 154         id = oseq->os_last_oid;
 155         spin_unlock(&oseq->os_last_oid_lock);
 156
 157         return id;
 158 }
 159
 160 void ofd_seq_last_oid_set(struct ofd_seq *oseq, obd_id id)
 161 {
 162         spin_lock(&oseq->os_last_oid_lock);
 163         if (likely(oseq->os_last_oid < id))
 164                 oseq->os_last_oid = id;
 165         spin_unlock(&oseq->os_last_oid_lock);
 166 }
 167
 168 int ofd_seq_last_oid_write(const struct lu_env *env, struct ofd_device *ofd,
 169                            struct ofd_seq *oseq)
 170 {
 171         struct ofd_thread_info  *info = ofd_info(env);
 172         obd_id                   tmp;
 173         int                      rc;
 174
 175         ENTRY;
 176
 177         info->fti_buf.lb_buf = &tmp;
 178         info->fti_buf.lb_len = sizeof(tmp);
 179         info->fti_off = 0;
 180
 181         CDEBUG(D_INODE, "%s: write last_objid for seq "LPX64" : "LPX64"\n",
 182                ofd_name(ofd), oseq->os_seq, ofd_seq_last_oid(oseq));
 183
 184         tmp = cpu_to_le64(ofd_seq_last_oid(oseq));
 185
 186         rc = ofd_record_write(env, ofd, oseq->os_lastid_obj, &info->fti_buf,
 187                               &info->fti_off);
 188         RETURN(rc);
 189 }
 190
 191 static int ofd_seq_count_write(const struct lu_env *env, struct ofd_device *ofd)
 192 {
 193         struct ofd_thread_info  *info = ofd_info(env);
 194         obd_seq                  tmp;
 195         int                      rc;
 196
 197         ENTRY;
 198
 199         info->fti_buf.lb_buf = &tmp;
 200         info->fti_buf.lb_len = sizeof(tmp);
 201         info->fti_off = 0;
 202
 203         tmp = cpu_to_le32(ofd->ofd_seq_count);
 204
 205         rc = ofd_record_write(env, ofd, ofd->ofd_seq_count_file,
 206                               &info->fti_buf, &info->fti_off);
 207
 208         RETURN(rc);
 209 }
 210
 211 void ofd_seqs_fini(const struct lu_env *env, struct ofd_device *ofd)
 212 {
 213         struct ofd_seq  *oseq;
 214         struct ofd_seq  *tmp;
 215         cfs_list_t       dispose;
 216
 217         CFS_INIT_LIST_HEAD(&dispose);
 218         write_lock(&ofd->ofd_seq_list_lock);
 219         cfs_list_for_each_entry_safe(oseq, tmp, &ofd->ofd_seq_list, os_list) {
 220                 cfs_list_move(&oseq->os_list, &dispose);
 221         }
 222         write_unlock(&ofd->ofd_seq_list_lock);
 223
 224         while (!cfs_list_empty(&dispose)) {
 225                 oseq = container_of0(dispose.next, struct ofd_seq, os_list);
 226                 ofd_seq_delete(env, oseq);
 227         }
 228
 229         LASSERT(cfs_list_empty(&ofd->ofd_seq_list));
 230         return;
 231 }
 232
 233 struct ofd_seq *ofd_seq_load(const struct lu_env *env, struct ofd_device *ofd,
 234                              obd_seq seq)
 235 {
 236         struct ofd_thread_info  *info = ofd_info(env);
 237         struct ofd_seq          *oseq = NULL;
 238         struct dt_object        *dob;
 239         obd_id                   lastid;
 240         int                      rc;
 241
 242         ENTRY;
 243
 244         /* if seq is already initialized */
 245         oseq = ofd_seq_get(ofd, seq);
 246         if (oseq != NULL)
 247                 RETURN(oseq);
 248
 249         OBD_ALLOC_PTR(oseq);
 250         if (oseq == NULL)
 251                 RETURN(ERR_PTR(-ENOMEM));
 252
 253         lu_local_obj_fid(&info->fti_fid, OFD_GROUP0_LAST_OID + seq);
 254
 255         memset(&info->fti_attr, 0, sizeof(info->fti_attr));
 256         info->fti_attr.la_valid = LA_MODE;
 257         info->fti_attr.la_mode = S_IFREG |  S_IRUGO | S_IWUSR;
 258         info->fti_dof.dof_type = dt_mode_to_dft(S_IFREG);
 259
 260         /* create object tracking per-seq last created
 261          * id to be used by orphan recovery mechanism */
 262         dob = dt_find_or_create(env, ofd->ofd_osd, &info->fti_fid,
 263                                 &info->fti_dof, &info->fti_attr);
 264         if (IS_ERR(dob)) {
 265                 OBD_FREE_PTR(oseq);
 266                 RETURN((void *)dob);
 267         }
 268
 269         oseq->os_lastid_obj = dob;
 270
 271         CFS_INIT_LIST_HEAD(&oseq->os_list);
 272         mutex_init(&oseq->os_create_lock);
 273         spin_lock_init(&oseq->os_last_oid_lock);
 274         oseq->os_seq = seq;
 275
 276         cfs_atomic_set(&oseq->os_refc, 1);
 277
 278         rc = dt_attr_get(env, dob, &info->fti_attr, BYPASS_CAPA);
 279         if (rc)
 280                 GOTO(cleanup, rc);
 281
 282         if (info->fti_attr.la_size == 0) {
 283                 /* object is just created, initialize last id */
 284                 oseq->os_last_oid = OFD_INIT_OBJID;
 285                 ofd_seq_last_oid_write(env, ofd, oseq);
 286                 ofd_seq_count_write(env, ofd);
 287         } else if (info->fti_attr.la_size == sizeof(lastid)) {
 288                 info->fti_off = 0;
 289                 info->fti_buf.lb_buf = &lastid;
 290                 info->fti_buf.lb_len = sizeof(lastid);
 291
 292                 rc = dt_record_read(env, dob, &info->fti_buf, &info->fti_off);
 293                 if (rc) {
 294                         CERROR("%s: can't read last_id: rc = %d\n",
 295                                 ofd_name(ofd), rc);
 296                         GOTO(cleanup, rc);
 297                 }
 298                 oseq->os_last_oid = le64_to_cpu(lastid);
 299         } else {
 300                 CERROR("%s: corrupted size "LPU64" LAST_ID of seq "LPX64"\n",
 301                         ofd_name(ofd), (__u64)info->fti_attr.la_size, seq);
 302                 GOTO(cleanup, rc = -EINVAL);
 303         }
 304
 305         oseq = ofd_seq_add(env, ofd, oseq);
 306         RETURN(oseq);
 307 cleanup:
 308         ofd_seq_put(env, oseq);
 309         return ERR_PTR(rc);
 310 }
 311
 312 /* object sequence management */
 313 int ofd_seqs_init(const struct lu_env *env, struct ofd_device *ofd)
 314 {
 315         struct ofd_thread_info  *info = ofd_info(env);
 316         unsigned long           seq_count_size;
 317         obd_seq                 seq_count;
 318         int                     rc = 0;
 319         int                     i;
 320
 321         ENTRY;
 322
 323         rwlock_init(&ofd->ofd_seq_list_lock);
 324         CFS_INIT_LIST_HEAD(&ofd->ofd_seq_list);
 325
 326         rc = dt_attr_get(env, ofd->ofd_seq_count_file,
 327                          &info->fti_attr, BYPASS_CAPA);
 328         if (rc)
 329                 GOTO(cleanup, rc);
 330
 331         seq_count_size = (unsigned long)info->fti_attr.la_size;
 332
 333         if (seq_count_size == sizeof(seq_count)) {
 334                 info->fti_off = 0;
 335                 info->fti_buf.lb_buf = &seq_count;
 336                 info->fti_buf.lb_len = sizeof(seq_count);
 337
 338                 rc = dt_record_read(env, ofd->ofd_seq_count_file,
 339                                     &info->fti_buf, &info->fti_off);
 340                 if (rc) {
 341                         CERROR("%s: can't read LAST_GROUP: rc = %d\n",
 342                                ofd_name(ofd), rc);
 343                         GOTO(cleanup, rc);
 344                 }
 345
 346                 ofd->ofd_seq_count = le64_to_cpu(seq_count);
 347         } else if (seq_count_size == 0) {
 348                 ofd->ofd_seq_count = 0;
 349         } else {
 350                 CERROR("%s: seqs file is corrupted? size = %lu\n",
 351                        ofd_name(ofd), seq_count_size);
 352                 GOTO(cleanup, rc = -EIO);
 353         }
 354
 355         for (i = 0; i <= ofd->ofd_seq_count; i++) {
 356                 struct ofd_seq *oseq;
 357
 358                 oseq = ofd_seq_load(env, ofd, i);
 359                 if (IS_ERR(oseq)) {
 360                         CERROR("%s: can't load seq %d: rc = %d\n",
 361                                ofd_name(ofd), i, rc);
 362                         /* Clean all previously set seqs */
 363                         ofd_seqs_fini(env, ofd);
 364                         GOTO(cleanup, rc);
 365                 } else {
 366                         ofd_seq_put(env, oseq);
 367                 }
 368         }
 369
 370         CDEBUG(D_OTHER, "%s: %u seqs initialized\n", ofd_name(ofd),
 371                ofd->ofd_seq_count + 1);
 372 cleanup:
 373         RETURN(rc);
 374 }
 375
 376 int ofd_clients_data_init(const struct lu_env *env, struct ofd_device *ofd,
 377                           unsigned long fsize)
 378 {
 379         struct obd_device               *obd = ofd_obd(ofd);
 380         struct lr_server_data           *lsd = &ofd->ofd_lut.lut_lsd;
 381         struct lsd_client_data          *lcd = NULL;
 382         struct filter_export_data       *fed;
 383         int                              cl_idx;
 384         int                              rc = 0;
 385         loff_t                           off = lsd->lsd_client_start;
 386
 387         CLASSERT(offsetof(struct lsd_client_data, lcd_padding) +
 388                  sizeof(lcd->lcd_padding) == LR_CLIENT_SIZE);
 389
 390         OBD_ALLOC_PTR(lcd);
 391         if (lcd == NULL)
 392                 RETURN(-ENOMEM);
 393
 394         for (cl_idx = 0; off < fsize; cl_idx++) {
 395                 struct obd_export       *exp;
 396                 __u64                    last_rcvd;
 397
 398                 /* Don't assume off is incremented properly by
 399                  * fsfilt_read_record(), in case sizeof(*lcd)
 400                  * isn't the same as fsd->lsd_client_size.  */
 401                 off = lsd->lsd_client_start + cl_idx * lsd->lsd_client_size;
 402                 rc = tgt_client_data_read(env, &ofd->ofd_lut, lcd, &off, cl_idx);
 403                 if (rc) {
 404                         CERROR("%s: error reading FILT %s idx %d off %llu: "
 405                                "rc = %d\n", ofd_name(ofd), LAST_RCVD, cl_idx,
 406                                off, rc);
 407                         rc = 0;
 408                         break; /* read error shouldn't cause startup to fail */
 409                 }
 410
 411                 if (lcd->lcd_uuid[0] == '\0') {
 412                         CDEBUG(D_INFO, "skipping zeroed client at offset %d\n",
 413                                cl_idx);
 414                         continue;
 415                 }
 416
 417                 last_rcvd = lcd->lcd_last_transno;
 418
 419                 /* These exports are cleaned up by ofd_disconnect(), so they
 420                  * need to be set up like real exports as ofd_connect() does.
 421                  */
 422                 exp = class_new_export(obd, (struct obd_uuid *)lcd->lcd_uuid);
 423
 424                 CDEBUG(D_HA, "RCVRNG CLIENT uuid: %s idx: %d lr: "LPU64
 425                        " srv lr: "LPU64"\n", lcd->lcd_uuid, cl_idx,
 426                        last_rcvd, lsd->lsd_last_transno);
 427
 428                 if (IS_ERR(exp)) {
 429                         if (PTR_ERR(exp) == -EALREADY) {
 430                                 /* export already exists, zero out this one */
 431                                 CERROR("%s: Duplicate export %s!\n",
 432                                        ofd_name(ofd), lcd->lcd_uuid);
 433                                 continue;
 434                         }
 435                         GOTO(err_out, rc = PTR_ERR(exp));
 436                 }
 437
 438                 fed = &exp->exp_filter_data;
 439                 *fed->fed_ted.ted_lcd = *lcd;
 440
 441                 rc = tgt_client_add(env, exp, cl_idx);
 442                 LASSERTF(rc == 0, "rc = %d\n", rc); /* can't fail existing */
 443                 /* VBR: set export last committed version */
 444                 exp->exp_last_committed = last_rcvd;
 445                 spin_lock(&exp->exp_lock);
 446                 exp->exp_connecting = 0;
 447                 exp->exp_in_recovery = 0;
 448                 spin_unlock(&exp->exp_lock);
 449                 obd->obd_max_recoverable_clients++;
 450                 class_export_put(exp);
 451
 452                 /* Need to check last_rcvd even for duplicated exports. */
 453                 CDEBUG(D_OTHER, "client at idx %d has last_rcvd = "LPU64"\n",
 454                        cl_idx, last_rcvd);
 455
 456                 spin_lock(&ofd->ofd_lut.lut_translock);
 457                 if (last_rcvd > lsd->lsd_last_transno)
 458                         lsd->lsd_last_transno = last_rcvd;
 459                 spin_unlock(&ofd->ofd_lut.lut_translock);
 460         }
 461
 462 err_out:
 463         OBD_FREE_PTR(lcd);
 464         RETURN(rc);
 465 }
 466
 467 int ofd_server_data_init(const struct lu_env *env, struct ofd_device *ofd)
 468 {
 469         struct ofd_thread_info  *info = ofd_info(env);
 470         struct lr_server_data   *lsd = &ofd->ofd_lut.lut_lsd;
 471         struct obd_device       *obd = ofd_obd(ofd);
 472         unsigned long            last_rcvd_size;
 473         int                      rc;
 474
 475         rc = dt_attr_get(env, ofd->ofd_lut.lut_last_rcvd, &info->fti_attr,
 476                          BYPASS_CAPA);
 477         if (rc)
 478                 RETURN(rc);
 479
 480         last_rcvd_size = (unsigned long)info->fti_attr.la_size;
 481
 482         /* ensure padding in the struct is the correct size */
 483         CLASSERT (offsetof(struct lr_server_data, lsd_padding) +
 484                   sizeof(lsd->lsd_padding) == LR_SERVER_SIZE);
 485
 486         if (last_rcvd_size == 0) {
 487                 LCONSOLE_WARN("%s: new disk, initializing\n", obd->obd_name);
 488
 489                 memcpy(lsd->lsd_uuid, obd->obd_uuid.uuid,
 490                        sizeof(lsd->lsd_uuid));
 491                 lsd->lsd_last_transno = 0;
 492                 lsd->lsd_mount_count = 0;
 493                 lsd->lsd_server_size = LR_SERVER_SIZE;
 494                 lsd->lsd_client_start = LR_CLIENT_START;
 495                 lsd->lsd_client_size = LR_CLIENT_SIZE;
 496                 lsd->lsd_subdir_count = FILTER_SUBDIR_COUNT;
 497                 lsd->lsd_feature_incompat = OBD_INCOMPAT_OST;
 498         } else {
 499                 rc = tgt_server_data_read(env, &ofd->ofd_lut);
 500                 if (rc) {
 501                         CDEBUG(D_INODE,"OBD ofd: error reading %s: rc %d\n",
 502                                LAST_RCVD, rc);
 503                         GOTO(err_fsd, rc);
 504                 }
 505                 if (strcmp((char *)lsd->lsd_uuid,
 506                            (char *)obd->obd_uuid.uuid)) {
 507                         LCONSOLE_ERROR("Trying to start OBD %s using the wrong"
 508                                        " disk %s. Were the /dev/ assignments "
 509                                        "rearranged?\n",
 510                                        obd->obd_uuid.uuid, lsd->lsd_uuid);
 511                         GOTO(err_fsd, rc = -EINVAL);
 512                 }
 513         }
 514
 515         lsd->lsd_mount_count++;
 516         obd->u.obt.obt_mount_count = lsd->lsd_mount_count;
 517         obd->u.obt.obt_instance = (__u32)obd->u.obt.obt_mount_count;
 518         ofd->ofd_subdir_count = lsd->lsd_subdir_count;
 519
 520         if (lsd->lsd_feature_incompat & ~OFD_INCOMPAT_SUPP) {
 521                 CERROR("%s: unsupported incompat filesystem feature(s) %x\n",
 522                        obd->obd_name,
 523                        lsd->lsd_feature_incompat & ~OFD_INCOMPAT_SUPP);
 524                 GOTO(err_fsd, rc = -EINVAL);
 525         }
 526         if (lsd->lsd_feature_rocompat & ~OFD_ROCOMPAT_SUPP) {
 527                 CERROR("%s: unsupported read-only filesystem feature(s) %x\n",
 528                        obd->obd_name,
 529                        lsd->lsd_feature_rocompat & ~OFD_ROCOMPAT_SUPP);
 530                 /* Do something like remount filesystem read-only */
 531                 GOTO(err_fsd, rc = -EINVAL);
 532         }
 533
 534         CDEBUG(D_INODE, "%s: server last_transno : "LPU64"\n",
 535                obd->obd_name, lsd->lsd_last_transno);
 536         CDEBUG(D_INODE, "%s: server mount_count: "LPU64"\n",
 537                obd->obd_name, lsd->lsd_mount_count);
 538         CDEBUG(D_INODE, "%s: server data size: %u\n",
 539                obd->obd_name, lsd->lsd_server_size);
 540         CDEBUG(D_INODE, "%s: per-client data start: %u\n",
 541                obd->obd_name, lsd->lsd_client_start);
 542         CDEBUG(D_INODE, "%s: per-client data size: %u\n",
 543                obd->obd_name, lsd->lsd_client_size);
 544         CDEBUG(D_INODE, "%s: server subdir_count: %u\n",
 545                obd->obd_name, lsd->lsd_subdir_count);
 546         CDEBUG(D_INODE, "%s: last_rcvd clients: %lu\n", obd->obd_name,
 547                last_rcvd_size <= lsd->lsd_client_start ? 0 :
 548                (last_rcvd_size - lsd->lsd_client_start) /
 549                lsd->lsd_client_size);
 550
 551         if (!obd->obd_replayable)
 552                 CWARN("%s: recovery support OFF\n", obd->obd_name);
 553
 554         rc = ofd_clients_data_init(env, ofd, last_rcvd_size);
 555
 556         spin_lock(&ofd->ofd_lut.lut_translock);
 557         obd->obd_last_committed = lsd->lsd_last_transno;
 558         ofd->ofd_lut.lut_last_transno = lsd->lsd_last_transno;
 559         spin_unlock(&ofd->ofd_lut.lut_translock);
 560
 561         /* save it, so mount count and last_transno is current */
 562         rc = tgt_server_data_update(env, &ofd->ofd_lut, 0);
 563         if (rc)
 564                 GOTO(err_fsd, rc);
 565
 566         RETURN(0);
 567
 568 err_fsd:
 569         class_disconnect_exports(obd);
 570         RETURN(rc);
 571 }
 572
 573 int ofd_fs_setup(const struct lu_env *env, struct ofd_device *ofd,
 574                  struct obd_device *obd)
 575 {
 576         struct ofd_thread_info  *info = ofd_info(env);
 577         struct dt_object        *fo;
 578         int                      rc = 0;
 579
 580         ENTRY;
 581
 582         if (OBD_FAIL_CHECK(OBD_FAIL_MDS_FS_SETUP))
 583                 RETURN (-ENOENT);
 584
 585         /* prepare transactions callbacks */
 586         ofd->ofd_txn_cb.dtc_txn_start = NULL;
 587         ofd->ofd_txn_cb.dtc_txn_stop = ofd_txn_stop_cb;
 588         ofd->ofd_txn_cb.dtc_txn_commit = NULL;
 589         ofd->ofd_txn_cb.dtc_cookie = ofd;
 590         ofd->ofd_txn_cb.dtc_tag = LCT_DT_THREAD;
 591         CFS_INIT_LIST_HEAD(&ofd->ofd_txn_cb.dtc_linkage);
 592
 593         dt_txn_callback_add(ofd->ofd_osd, &ofd->ofd_txn_cb);
 594
 595         rc = ofd_server_data_init(env, ofd);
 596         if (rc)
 597                 GOTO(out, rc);
 598
 599         lu_local_obj_fid(&info->fti_fid, OFD_HEALTH_CHECK_OID);
 600         memset(&info->fti_attr, 0, sizeof(info->fti_attr));
 601         info->fti_attr.la_valid = LA_MODE;
 602         info->fti_attr.la_mode = S_IFREG | S_IRUGO | S_IWUSR;
 603         info->fti_dof.dof_type = dt_mode_to_dft(S_IFREG);
 604
 605         fo = dt_find_or_create(env, ofd->ofd_osd, &info->fti_fid,
 606                                &info->fti_dof, &info->fti_attr);
 607         if (IS_ERR(fo))
 608                 GOTO(out, rc = PTR_ERR(fo));
 609
 610         ofd->ofd_health_check_file = fo;
 611
 612         lu_local_obj_fid(&info->fti_fid, OFD_LAST_GROUP_OID);
 613         memset(&info->fti_attr, 0, sizeof(info->fti_attr));
 614         info->fti_attr.la_valid = LA_MODE;
 615         info->fti_attr.la_mode = S_IFREG | S_IRUGO | S_IWUSR;
 616         info->fti_dof.dof_type = dt_mode_to_dft(S_IFREG);
 617
 618         fo = dt_find_or_create(env, ofd->ofd_osd, &info->fti_fid,
 619                                &info->fti_dof, &info->fti_attr);
 620         if (IS_ERR(fo))
 621                 GOTO(out_hc, rc = PTR_ERR(fo));
 622
 623         ofd->ofd_seq_count_file = fo;
 624
 625         rc = ofd_seqs_init(env, ofd);
 626         if (rc)
 627                 GOTO(out_lg, rc);
 628
 629         RETURN(0);
 630 out_lg:
 631         lu_object_put(env, &ofd->ofd_seq_count_file->do_lu);
 632 out_hc:
 633         lu_object_put(env, &ofd->ofd_health_check_file->do_lu);
 634 out:
 635         dt_txn_callback_del(ofd->ofd_osd, &ofd->ofd_txn_cb);
 636         return rc;
 637 }
 638
 639 void ofd_fs_cleanup(const struct lu_env *env, struct ofd_device *ofd)
 640 {
 641         int i;
 642
 643         ENTRY;
 644
 645         ofd_info_init(env, NULL);
 646
 647         ofd_seqs_fini(env, ofd);
 648
 649         i = dt_sync(env, ofd->ofd_osd);
 650         if (i)
 651                 CERROR("can't sync: %d\n", i);
 652
 653         /* Remove transaction callback */
 654         dt_txn_callback_del(ofd->ofd_osd, &ofd->ofd_txn_cb);
 655
 656         if (ofd->ofd_seq_count_file) {
 657                 lu_object_put(env, &ofd->ofd_seq_count_file->do_lu);
 658                 ofd->ofd_seq_count_file = NULL;
 659         }
 660
 661         if (ofd->ofd_health_check_file) {
 662                 lu_object_put(env, &ofd->ofd_health_check_file->do_lu);
 663                 ofd->ofd_health_check_file = NULL;
 664         }
 665
 666         EXIT;
 667 }
 668