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) 2011, 2012, Whamcloud, Inc.
  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 obd_id ofd_last_id(struct ofd_device *ofd, obd_seq group)
  72 {
  73         obd_id id;
  74
  75         LASSERT(group <= ofd->ofd_max_group);
  76
  77         cfs_spin_lock(&ofd->ofd_objid_lock);
  78         id = ofd->ofd_last_objids[group];
  79         cfs_spin_unlock(&ofd->ofd_objid_lock);
  80
  81         return id;
  82 }
  83
  84 void ofd_last_id_set(struct ofd_device *ofd, obd_id id, obd_seq group)
  85 {
  86         LASSERT(group <= ofd->ofd_max_group);
  87         cfs_spin_lock(&ofd->ofd_objid_lock);
  88         if (ofd->ofd_last_objids[group] < id)
  89                 ofd->ofd_last_objids[group] = id;
  90         cfs_spin_unlock(&ofd->ofd_objid_lock);
  91 }
  92
  93 int ofd_last_id_write(const struct lu_env *env, struct ofd_device *ofd,
  94                       obd_seq group)
  95 {
  96         struct ofd_thread_info  *info = ofd_info(env);
  97         obd_id                   tmp;
  98         int                      rc;
  99
 100         ENTRY;
 101
 102         info->fti_buf.lb_buf = &tmp;
 103         info->fti_buf.lb_len = sizeof(tmp);
 104         info->fti_off = 0;
 105
 106         CDEBUG(D_INODE, "%s: write last_objid for group "LPU64": "LPU64"\n",
 107                ofd_obd(ofd)->obd_name, group, ofd_last_id(ofd, group));
 108
 109         tmp = cpu_to_le64(ofd_last_id(ofd, group));
 110
 111         rc = ofd_record_write(env, ofd, ofd->ofd_lastid_obj[group],
 112                               &info->fti_buf, &info->fti_off);
 113         RETURN(rc);
 114 }
 115
 116 int ofd_last_group_write(const struct lu_env *env, struct ofd_device *ofd)
 117 {
 118         struct ofd_thread_info  *info = ofd_info(env);
 119         obd_seq                  tmp;
 120         int                      rc;
 121
 122         ENTRY;
 123
 124         info->fti_buf.lb_buf = &tmp;
 125         info->fti_buf.lb_len = sizeof(tmp);
 126         info->fti_off = 0;
 127
 128         tmp = cpu_to_le32(ofd->ofd_max_group);
 129
 130         rc = ofd_record_write(env, ofd, ofd->ofd_last_group_file,
 131                               &info->fti_buf, &info->fti_off);
 132
 133         RETURN(rc);
 134 }
 135
 136 void ofd_group_fini(const struct lu_env *env, struct ofd_device *ofd,
 137                     int group)
 138 {
 139         LASSERT(ofd->ofd_lastid_obj[group]);
 140         lu_object_put(env, &ofd->ofd_lastid_obj[group]->do_lu);
 141         ofd->ofd_lastid_obj[group] = NULL;
 142 }
 143
 144 int ofd_group_load(const struct lu_env *env, struct ofd_device *ofd, int group)
 145 {
 146         struct ofd_thread_info  *info = ofd_info(env);
 147         struct dt_object        *dob;
 148         obd_id                   lastid;
 149         int                      rc;
 150
 151         ENTRY;
 152
 153         /* if group is already initialized */
 154         if (ofd->ofd_lastid_obj[group])
 155                 RETURN(0);
 156
 157         lu_local_obj_fid(&info->fti_fid, OFD_GROUP0_LAST_OID + group);
 158         memset(&info->fti_attr, 0, sizeof(info->fti_attr));
 159         info->fti_attr.la_valid = LA_MODE;
 160         info->fti_attr.la_mode = S_IFREG |  S_IRUGO | S_IWUSR;
 161         info->fti_dof.dof_type = dt_mode_to_dft(S_IFREG);
 162
 163         /* create object tracking per-group last created
 164          * id to be used by orphan recovery mechanism */
 165         dob = dt_find_or_create(env, ofd->ofd_osd, &info->fti_fid,
 166                                 &info->fti_dof, &info->fti_attr);
 167         if (IS_ERR(dob))
 168                 RETURN(PTR_ERR(dob));
 169
 170         ofd->ofd_lastid_obj[group] = dob;
 171         cfs_mutex_init(&ofd->ofd_create_locks[group]);
 172
 173         rc = dt_attr_get(env, dob, &info->fti_attr, BYPASS_CAPA);
 174         if (rc)
 175                 GOTO(cleanup, rc);
 176
 177         if (info->fti_attr.la_size == 0) {
 178                 /* object is just created, initialize last id */
 179                 ofd->ofd_last_objids[group] = OFD_INIT_OBJID;
 180                 ofd_last_id_set(ofd, OFD_INIT_OBJID, group);
 181                 ofd_last_id_write(env, ofd, group);
 182                 ofd_last_group_write(env, ofd);
 183         } else if (info->fti_attr.la_size == sizeof(lastid)) {
 184                 info->fti_off = 0;
 185                 info->fti_buf.lb_buf = &lastid;
 186                 info->fti_buf.lb_len = sizeof(lastid);
 187
 188                 rc = dt_record_read(env, dob, &info->fti_buf, &info->fti_off);
 189                 if (rc) {
 190                         CERROR("can't read last_id: %d\n", rc);
 191                         GOTO(cleanup, rc);
 192                 }
 193                 ofd->ofd_last_objids[group] = le64_to_cpu(lastid);
 194         } else {
 195                 CERROR("corrupted size %Lu LAST_ID of group %u\n",
 196                        (unsigned long long)info->fti_attr.la_size, group);
 197                 rc = -EINVAL;
 198         }
 199
 200         RETURN(0);
 201 cleanup:
 202         ofd_group_fini(env, ofd, group);
 203         RETURN(rc);
 204 }
 205
 206 /* ofd groups managements */
 207 int ofd_groups_init(const struct lu_env *env, struct ofd_device *ofd)
 208 {
 209         struct ofd_thread_info  *info = ofd_info(env);
 210         unsigned long            groups_size;
 211         obd_seq                  last_group;
 212         int                      rc = 0;
 213         int                      i;
 214
 215         ENTRY;
 216
 217         cfs_spin_lock_init(&ofd->ofd_objid_lock);
 218
 219         rc = dt_attr_get(env, ofd->ofd_last_group_file,
 220                          &info->fti_attr, BYPASS_CAPA);
 221         if (rc)
 222                 GOTO(cleanup, rc);
 223
 224         groups_size = (unsigned long)info->fti_attr.la_size;
 225
 226         if (groups_size == sizeof(last_group)) {
 227                 info->fti_off = 0;
 228                 info->fti_buf.lb_buf = &last_group;
 229                 info->fti_buf.lb_len = sizeof(last_group);
 230
 231                 rc = dt_record_read(env, ofd->ofd_last_group_file,
 232                                     &info->fti_buf, &info->fti_off);
 233                 if (rc) {
 234                         CERROR("can't read LAST_GROUP: %d\n", rc);
 235                         GOTO(cleanup, rc);
 236                 }
 237
 238                 ofd->ofd_max_group = le32_to_cpu(last_group);
 239                 LASSERT(ofd->ofd_max_group <= OFD_MAX_GROUPS);
 240         } else if (groups_size == 0) {
 241                 ofd->ofd_max_group = 0;
 242         } else {
 243                 CERROR("groups file is corrupted? size = %lu\n", groups_size);
 244                 GOTO(cleanup, rc = -EIO);
 245         }
 246
 247         for (i = 0; i <= ofd->ofd_max_group; i++) {
 248                 rc = ofd_group_load(env, ofd, i);
 249                 if (rc) {
 250                         CERROR("can't load group %d: %d\n", i, rc);
 251                         /* Clean all previously set groups */
 252                         while (i > 0)
 253                                 ofd_group_fini(env, ofd, --i);
 254                         GOTO(cleanup, rc);
 255                 }
 256         }
 257
 258         CWARN("%s: %u groups initialized\n",
 259               ofd_obd(ofd)->obd_name, ofd->ofd_max_group + 1);
 260 cleanup:
 261         RETURN(rc);
 262 }
 263
 264 int ofd_clients_data_init(const struct lu_env *env, struct ofd_device *ofd,
 265                           unsigned long fsize)
 266 {
 267         struct obd_device               *obd = ofd_obd(ofd);
 268         struct lr_server_data           *lsd = &ofd->ofd_lut.lut_lsd;
 269         struct lsd_client_data          *lcd = NULL;
 270         struct filter_export_data       *fed;
 271         int                              cl_idx;
 272         int                              rc = 0;
 273         loff_t                           off = lsd->lsd_client_start;
 274
 275         CLASSERT(offsetof(struct lsd_client_data, lcd_padding) +
 276                  sizeof(lcd->lcd_padding) == LR_CLIENT_SIZE);
 277
 278         OBD_ALLOC_PTR(lcd);
 279         if (lcd == NULL)
 280                 RETURN(-ENOMEM);
 281
 282         for (cl_idx = 0; off < fsize; cl_idx++) {
 283                 struct obd_export       *exp;
 284                 __u64                    last_rcvd;
 285
 286                 /* Don't assume off is incremented properly by
 287                  * fsfilt_read_record(), in case sizeof(*lcd)
 288                  * isn't the same as fsd->lsd_client_size.  */
 289                 off = lsd->lsd_client_start + cl_idx * lsd->lsd_client_size;
 290                 rc = lut_client_data_read(env, &ofd->ofd_lut, lcd, &off, cl_idx);
 291                 if (rc) {
 292                         CERROR("error reading FILT %s idx %d off %llu: rc %d\n",
 293                                LAST_RCVD, cl_idx, off, rc);
 294                         rc = 0;
 295                         break; /* read error shouldn't cause startup to fail */
 296                 }
 297
 298                 if (lcd->lcd_uuid[0] == '\0') {
 299                         CDEBUG(D_INFO, "skipping zeroed client at offset %d\n",
 300                                cl_idx);
 301                         continue;
 302                 }
 303
 304                 last_rcvd = lcd->lcd_last_transno;
 305
 306                 /* These exports are cleaned up by ofd_disconnect(), so they
 307                  * need to be set up like real exports as ofd_connect() does.
 308                  */
 309                 exp = class_new_export(obd, (struct obd_uuid *)lcd->lcd_uuid);
 310
 311                 CDEBUG(D_HA, "RCVRNG CLIENT uuid: %s idx: %d lr: "LPU64
 312                        " srv lr: "LPU64"\n", lcd->lcd_uuid, cl_idx,
 313                        last_rcvd, lsd->lsd_last_transno);
 314
 315                 if (IS_ERR(exp)) {
 316                         if (PTR_ERR(exp) == -EALREADY) {
 317                                 /* export already exists, zero out this one */
 318                                 CERROR("Duplicate export %s!\n", lcd->lcd_uuid);
 319                                 continue;
 320                         }
 321                         GOTO(err_out, rc = PTR_ERR(exp));
 322                 }
 323
 324                 fed = &exp->exp_filter_data;
 325                 *fed->fed_ted.ted_lcd = *lcd;
 326
 327                 ofd_export_stats_init(ofd, exp, NULL);
 328                 rc = lut_client_add(env, exp, cl_idx);
 329                 LASSERTF(rc == 0, "rc = %d\n", rc); /* can't fail existing */
 330                 /* VBR: set export last committed version */
 331                 exp->exp_last_committed = last_rcvd;
 332                 cfs_spin_lock(&exp->exp_lock);
 333                 exp->exp_connecting = 0;
 334                 exp->exp_in_recovery = 0;
 335                 cfs_spin_unlock(&exp->exp_lock);
 336                 obd->obd_max_recoverable_clients++;
 337                 class_export_put(exp);
 338
 339                 /* Need to check last_rcvd even for duplicated exports. */
 340                 CDEBUG(D_OTHER, "client at idx %d has last_rcvd = "LPU64"\n",
 341                        cl_idx, last_rcvd);
 342
 343                 cfs_spin_lock(&ofd->ofd_lut.lut_translock);
 344                 if (last_rcvd > lsd->lsd_last_transno)
 345                         lsd->lsd_last_transno = last_rcvd;
 346                 cfs_spin_unlock(&ofd->ofd_lut.lut_translock);
 347         }
 348
 349 err_out:
 350         OBD_FREE_PTR(lcd);
 351         RETURN(rc);
 352 }
 353
 354 int ofd_server_data_init(const struct lu_env *env, struct ofd_device *ofd)
 355 {
 356         struct ofd_thread_info  *info = ofd_info(env);
 357         struct lr_server_data   *lsd = &ofd->ofd_lut.lut_lsd;
 358         struct obd_device       *obd = ofd_obd(ofd);
 359         unsigned long            last_rcvd_size;
 360         int                      rc;
 361
 362         rc = dt_attr_get(env, ofd->ofd_lut.lut_last_rcvd, &info->fti_attr,
 363                          BYPASS_CAPA);
 364         if (rc)
 365                 RETURN(rc);
 366
 367         last_rcvd_size = (unsigned long)info->fti_attr.la_size;
 368
 369         /* ensure padding in the struct is the correct size */
 370         CLASSERT (offsetof(struct lr_server_data, lsd_padding) +
 371                   sizeof(lsd->lsd_padding) == LR_SERVER_SIZE);
 372
 373         if (last_rcvd_size == 0) {
 374                 LCONSOLE_WARN("%s: new disk, initializing\n", obd->obd_name);
 375
 376                 memcpy(lsd->lsd_uuid, obd->obd_uuid.uuid,
 377                        sizeof(lsd->lsd_uuid));
 378                 lsd->lsd_last_transno = 0;
 379                 lsd->lsd_mount_count = 0;
 380                 lsd->lsd_server_size = LR_SERVER_SIZE;
 381                 lsd->lsd_client_start = LR_CLIENT_START;
 382                 lsd->lsd_client_size = LR_CLIENT_SIZE;
 383                 lsd->lsd_subdir_count = FILTER_SUBDIR_COUNT;
 384                 lsd->lsd_feature_incompat = OBD_INCOMPAT_OST;
 385         } else {
 386                 rc = lut_server_data_read(env, &ofd->ofd_lut);
 387                 if (rc) {
 388                         CDEBUG(D_INODE,"OBD ofd: error reading %s: rc %d\n",
 389                                LAST_RCVD, rc);
 390                         GOTO(err_fsd, rc);
 391                 }
 392                 if (strcmp((char *)lsd->lsd_uuid,
 393                            (char *)obd->obd_uuid.uuid)) {
 394                         LCONSOLE_ERROR("Trying to start OBD %s using the wrong"
 395                                        " disk %s. Were the /dev/ assignments "
 396                                        "rearranged?\n",
 397                                        obd->obd_uuid.uuid, lsd->lsd_uuid);
 398                         GOTO(err_fsd, rc = -EINVAL);
 399                 }
 400         }
 401
 402         lsd->lsd_mount_count++;
 403         obd->u.obt.obt_mount_count = lsd->lsd_mount_count;
 404         obd->u.obt.obt_instance = (__u32)obd->u.obt.obt_mount_count;
 405         ofd->ofd_subdir_count = lsd->lsd_subdir_count;
 406
 407         if (lsd->lsd_feature_incompat & ~OFD_INCOMPAT_SUPP) {
 408                 CERROR("%s: unsupported incompat filesystem feature(s) %x\n",
 409                        obd->obd_name,
 410                        lsd->lsd_feature_incompat & ~OFD_INCOMPAT_SUPP);
 411                 GOTO(err_fsd, rc = -EINVAL);
 412         }
 413         if (lsd->lsd_feature_rocompat & ~OFD_ROCOMPAT_SUPP) {
 414                 CERROR("%s: unsupported read-only filesystem feature(s) %x\n",
 415                        obd->obd_name,
 416                        lsd->lsd_feature_rocompat & ~OFD_ROCOMPAT_SUPP);
 417                 /* Do something like remount filesystem read-only */
 418                 GOTO(err_fsd, rc = -EINVAL);
 419         }
 420
 421         CDEBUG(D_INODE, "%s: server last_transno : "LPU64"\n",
 422                obd->obd_name, lsd->lsd_last_transno);
 423         CDEBUG(D_INODE, "%s: server mount_count: "LPU64"\n",
 424                obd->obd_name, lsd->lsd_mount_count);
 425         CDEBUG(D_INODE, "%s: server data size: %u\n",
 426                obd->obd_name, lsd->lsd_server_size);
 427         CDEBUG(D_INODE, "%s: per-client data start: %u\n",
 428                obd->obd_name, lsd->lsd_client_start);
 429         CDEBUG(D_INODE, "%s: per-client data size: %u\n",
 430                obd->obd_name, lsd->lsd_client_size);
 431         CDEBUG(D_INODE, "%s: server subdir_count: %u\n",
 432                obd->obd_name, lsd->lsd_subdir_count);
 433         CDEBUG(D_INODE, "%s: last_rcvd clients: %lu\n", obd->obd_name,
 434                last_rcvd_size <= lsd->lsd_client_start ? 0 :
 435                (last_rcvd_size - lsd->lsd_client_start) /
 436                lsd->lsd_client_size);
 437
 438         if (!obd->obd_replayable)
 439                 CWARN("%s: recovery support OFF\n", obd->obd_name);
 440
 441         rc = ofd_clients_data_init(env, ofd, last_rcvd_size);
 442
 443         cfs_spin_lock(&ofd->ofd_lut.lut_translock);
 444         obd->obd_last_committed = lsd->lsd_last_transno;
 445         cfs_spin_unlock(&ofd->ofd_lut.lut_translock);
 446
 447         /* save it, so mount count and last_transno is current */
 448         rc = lut_server_data_update(env, &ofd->ofd_lut, 0);
 449         if (rc)
 450                 GOTO(err_fsd, rc);
 451
 452         RETURN(0);
 453
 454 err_fsd:
 455         class_disconnect_exports(obd);
 456         RETURN(rc);
 457 }
 458
 459 int ofd_fs_setup(const struct lu_env *env, struct ofd_device *ofd,
 460                  struct obd_device *obd)
 461 {
 462         struct ofd_thread_info  *info = ofd_info(env);
 463         struct dt_object        *fo;
 464         int                      rc = 0;
 465
 466         ENTRY;
 467
 468         if (OBD_FAIL_CHECK(OBD_FAIL_MDS_FS_SETUP))
 469                 RETURN (-ENOENT);
 470
 471         rc = ofd_server_data_init(env, ofd);
 472         if (rc)
 473                 GOTO(out, rc);
 474
 475         lu_local_obj_fid(&info->fti_fid, OFD_HEALTH_CHECK_OID);
 476         memset(&info->fti_attr, 0, sizeof(info->fti_attr));
 477         info->fti_attr.la_valid = LA_MODE;
 478         info->fti_attr.la_mode = S_IFREG | S_IRUGO | S_IWUSR;
 479         info->fti_dof.dof_type = dt_mode_to_dft(S_IFREG);
 480
 481         fo = dt_find_or_create(env, ofd->ofd_osd, &info->fti_fid,
 482                                &info->fti_dof, &info->fti_attr);
 483         if (IS_ERR(fo))
 484                 GOTO(out, rc = PTR_ERR(fo));
 485
 486         ofd->ofd_health_check_file = fo;
 487
 488         lu_local_obj_fid(&info->fti_fid, OFD_LAST_GROUP_OID);
 489         memset(&info->fti_attr, 0, sizeof(info->fti_attr));
 490         info->fti_attr.la_valid = LA_MODE;
 491         info->fti_attr.la_mode = S_IFREG | S_IRUGO | S_IWUSR;
 492         info->fti_dof.dof_type = dt_mode_to_dft(S_IFREG);
 493
 494         fo = dt_find_or_create(env, ofd->ofd_osd, &info->fti_fid,
 495                                &info->fti_dof, &info->fti_attr);
 496         if (IS_ERR(fo))
 497                 GOTO(out_hc, rc = PTR_ERR(fo));
 498
 499         ofd->ofd_last_group_file = fo;
 500
 501         rc = ofd_groups_init(env, ofd);
 502         if (rc)
 503                 GOTO(out_lg, rc);
 504
 505         RETURN(0);
 506 out_lg:
 507         lu_object_put(env, &ofd->ofd_last_group_file->do_lu);
 508 out_hc:
 509         lu_object_put(env, &ofd->ofd_health_check_file->do_lu);
 510 out:
 511         return rc;
 512 }
 513
 514 void ofd_fs_cleanup(const struct lu_env *env, struct ofd_device *ofd)
 515 {
 516         int i;
 517
 518         ENTRY;
 519
 520         ofd_info_init(env, NULL);
 521
 522         for (i = 0; i <= ofd->ofd_max_group; i++) {
 523                 if (ofd->ofd_lastid_obj[i]) {
 524                         ofd_last_id_write(env, ofd, i);
 525                         ofd_group_fini(env, ofd, i);
 526                 }
 527         }
 528
 529         i = dt_sync(env, ofd->ofd_osd);
 530         if (i)
 531                 CERROR("can't sync: %d\n", i);
 532
 533         if (ofd->ofd_last_group_file) {
 534                 lu_object_put(env, &ofd->ofd_last_group_file->do_lu);
 535                 ofd->ofd_last_group_file = NULL;
 536         }
 537
 538         if (ofd->ofd_health_check_file) {
 539                 lu_object_put(env, &ofd->ofd_health_check_file->do_lu);
 540                 ofd->ofd_health_check_file = NULL;
 541         }
 542
 543         EXIT;
 544 }
 545