lustre/ofd/ofd_io.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_io.c
  37  *
  38  * Author: Alex Tomas <bzzz@whamcloud.com>
  39  */
  40
  41 #define DEBUG_SUBSYSTEM S_FILTER
  42
  43 #include "ofd_internal.h"
  44
  45 struct ofd_inconsistency_item {
  46         struct list_head         oii_list;
  47         struct ofd_object       *oii_obj;
  48         struct lu_fid            oii_pfid;
  49 };
  50
  51 static void ofd_inconsistency_verify_one(const struct lu_env *env,
  52                                          struct ofd_device *ofd,
  53                                          struct ofd_inconsistency_item *oii,
  54                                          struct lfsck_request *lr)
  55 {
  56         struct ofd_object       *fo     = oii->oii_obj;
  57         struct lu_fid           *pfid   = &fo->ofo_pfid;
  58         int                      rc;
  59
  60         LASSERT(fo->ofo_pfid_checking);
  61         LASSERT(!fo->ofo_pfid_verified);
  62
  63         lr->lr_fid = fo->ofo_header.loh_fid; /* OST-object itself FID. */
  64         lr->lr_fid2 = oii->oii_pfid; /* client given PFID. */
  65         lr->lr_fid3 = *pfid; /* OST local stored PFID. */
  66
  67         rc = lfsck_in_notify(env, ofd->ofd_osd, lr);
  68         ofd_write_lock(env, fo);
  69         switch (lr->lr_status) {
  70         case LPVS_INIT:
  71                 LASSERT(rc <= 0);
  72
  73                 if (rc < 0)
  74                         CDEBUG(D_LFSCK, "%s: fail to verify OST local stored "
  75                                "PFID xattr for "DFID", the client given PFID "
  76                                DFID", OST local stored PFID "DFID": rc = %d\n",
  77                                ofd_obd(ofd)->obd_name,
  78                                PFID(&fo->ofo_header.loh_fid),
  79                                PFID(&oii->oii_pfid), PFID(pfid), rc);
  80                 else
  81                         fo->ofo_pfid_verified = 1;
  82                 break;
  83         case LPVS_INCONSISTENT:
  84                 LASSERT(rc != 0);
  85
  86                 ofd->ofd_inconsistency_self_detected++;
  87                 if (rc < 0)
  88                         CDEBUG(D_LFSCK, "%s: fail to verify the client given "
  89                                "PFID for "DFID", the client given PFID "DFID
  90                                ", local stored PFID "DFID": rc = %d\n",
  91                                ofd_obd(ofd)->obd_name,
  92                                PFID(&fo->ofo_header.loh_fid),
  93                                PFID(&oii->oii_pfid), PFID(pfid), rc);
  94                 else
  95                         CDEBUG(D_LFSCK, "%s: both the client given PFID and "
  96                                "the OST local stored PFID are stale for the "
  97                                "OST-object "DFID", client given PFID is "DFID
  98                                ", local stored PFID is "DFID"\n",
  99                                ofd_obd(ofd)->obd_name,
 100                                PFID(&fo->ofo_header.loh_fid),
 101                                PFID(&oii->oii_pfid), PFID(pfid));
 102                 break;
 103         case LPVS_INCONSISTENT_TOFIX:
 104                 ofd->ofd_inconsistency_self_detected++;
 105                 if (rc == 0) {
 106                         ofd->ofd_inconsistency_self_repaired++;
 107                         CDEBUG(D_LFSCK, "%s: fixed the staled OST PFID xattr "
 108                                "for "DFID", with the client given PFID "DFID
 109                                ", the old stored PFID "DFID"\n",
 110                                ofd_obd(ofd)->obd_name,
 111                                PFID(&fo->ofo_header.loh_fid),
 112                                PFID(&oii->oii_pfid), PFID(pfid));
 113                 } else {
 114                         CDEBUG(D_LFSCK, "%s: fail to fix the OST PFID xattr "
 115                                "for "DFID", client given PFID "DFID", local "
 116                                "stored PFID "DFID": rc = %d\n",
 117                                ofd_obd(ofd)->obd_name,
 118                                PFID(&fo->ofo_header.loh_fid),
 119                                PFID(&oii->oii_pfid), PFID(pfid), rc);
 120                 }
 121                 *pfid = oii->oii_pfid;
 122                 fo->ofo_pfid_verified = 1;
 123                 break;
 124         default:
 125                 break;
 126         }
 127         fo->ofo_pfid_checking = 0;
 128         ofd_write_unlock(env, fo);
 129
 130         lu_object_put(env, &fo->ofo_obj.do_lu);
 131         OBD_FREE_PTR(oii);
 132 }
 133
 134 static int ofd_inconsistency_verification_main(void *args)
 135 {
 136         struct lu_env                  env;
 137         struct ofd_device             *ofd    = args;
 138         struct ptlrpc_thread          *thread = &ofd->ofd_inconsistency_thread;
 139         struct ofd_inconsistency_item *oii;
 140         struct lfsck_request          *lr     = NULL;
 141         struct l_wait_info             lwi    = { 0 };
 142         int                            rc;
 143         ENTRY;
 144
 145         rc = lu_env_init(&env, LCT_DT_THREAD);
 146         spin_lock(&ofd->ofd_inconsistency_lock);
 147         thread_set_flags(thread, rc != 0 ? SVC_STOPPED : SVC_RUNNING);
 148         wake_up_all(&thread->t_ctl_waitq);
 149         spin_unlock(&ofd->ofd_inconsistency_lock);
 150         if (rc != 0)
 151                 RETURN(rc);
 152
 153         OBD_ALLOC_PTR(lr);
 154         if (unlikely(lr == NULL))
 155                 GOTO(out, rc = -ENOMEM);
 156
 157         lr->lr_event = LE_PAIRS_VERIFY;
 158         lr->lr_active = LT_LAYOUT;
 159
 160         spin_lock(&ofd->ofd_inconsistency_lock);
 161         while (1) {
 162                 if (unlikely(!thread_is_running(thread)))
 163                         break;
 164
 165                 while (!list_empty(&ofd->ofd_inconsistency_list)) {
 166                         oii = list_entry(ofd->ofd_inconsistency_list.next,
 167                                          struct ofd_inconsistency_item,
 168                                          oii_list);
 169                         list_del_init(&oii->oii_list);
 170                         spin_unlock(&ofd->ofd_inconsistency_lock);
 171                         ofd_inconsistency_verify_one(&env, ofd, oii, lr);
 172                         spin_lock(&ofd->ofd_inconsistency_lock);
 173                 }
 174
 175                 spin_unlock(&ofd->ofd_inconsistency_lock);
 176                 l_wait_event(thread->t_ctl_waitq,
 177                              !list_empty(&ofd->ofd_inconsistency_list) ||
 178                              !thread_is_running(thread),
 179                              &lwi);
 180                 spin_lock(&ofd->ofd_inconsistency_lock);
 181         }
 182
 183         while (!list_empty(&ofd->ofd_inconsistency_list)) {
 184                 struct ofd_object *fo;
 185
 186                 oii = list_entry(ofd->ofd_inconsistency_list.next,
 187                                  struct ofd_inconsistency_item,
 188                                  oii_list);
 189                 list_del_init(&oii->oii_list);
 190                 fo = oii->oii_obj;
 191                 spin_unlock(&ofd->ofd_inconsistency_lock);
 192
 193                 ofd_write_lock(&env, fo);
 194                 fo->ofo_pfid_checking = 0;
 195                 ofd_write_unlock(&env, fo);
 196
 197                 lu_object_put(&env, &fo->ofo_obj.do_lu);
 198                 OBD_FREE_PTR(oii);
 199                 spin_lock(&ofd->ofd_inconsistency_lock);
 200         }
 201
 202         OBD_FREE_PTR(lr);
 203
 204         GOTO(out, rc = 0);
 205
 206 out:
 207         thread_set_flags(thread, SVC_STOPPED);
 208         wake_up_all(&thread->t_ctl_waitq);
 209         spin_unlock(&ofd->ofd_inconsistency_lock);
 210         lu_env_fini(&env);
 211
 212         return rc;
 213 }
 214
 215 int ofd_start_inconsistency_verification_thread(struct ofd_device *ofd)
 216 {
 217         struct ptlrpc_thread    *thread = &ofd->ofd_inconsistency_thread;
 218         struct l_wait_info       lwi    = { 0 };
 219         long                     rc;
 220
 221         spin_lock(&ofd->ofd_inconsistency_lock);
 222         if (unlikely(thread_is_running(thread))) {
 223                 spin_unlock(&ofd->ofd_inconsistency_lock);
 224
 225                 return -EALREADY;
 226         }
 227
 228         thread_set_flags(thread, 0);
 229         spin_unlock(&ofd->ofd_inconsistency_lock);
 230         rc = PTR_ERR(kthread_run(ofd_inconsistency_verification_main, ofd,
 231                                  "inconsistency_verification"));
 232         if (IS_ERR_VALUE(rc)) {
 233                 CERROR("%s: cannot start self_repair thread: rc = %ld\n",
 234                        ofd_obd(ofd)->obd_name, rc);
 235         } else {
 236                 rc = 0;
 237                 l_wait_event(thread->t_ctl_waitq,
 238                              thread_is_running(thread) ||
 239                              thread_is_stopped(thread),
 240                              &lwi);
 241         }
 242
 243         return rc;
 244 }
 245
 246 int ofd_stop_inconsistency_verification_thread(struct ofd_device *ofd)
 247 {
 248         struct ptlrpc_thread    *thread = &ofd->ofd_inconsistency_thread;
 249         struct l_wait_info       lwi    = { 0 };
 250
 251         spin_lock(&ofd->ofd_inconsistency_lock);
 252         if (thread_is_init(thread) || thread_is_stopped(thread)) {
 253                 spin_unlock(&ofd->ofd_inconsistency_lock);
 254
 255                 return -EALREADY;
 256         }
 257
 258         thread_set_flags(thread, SVC_STOPPING);
 259         spin_unlock(&ofd->ofd_inconsistency_lock);
 260         wake_up_all(&thread->t_ctl_waitq);
 261         l_wait_event(thread->t_ctl_waitq,
 262                      thread_is_stopped(thread),
 263                      &lwi);
 264
 265         return 0;
 266 }
 267
 268 static void ofd_add_inconsistency_item(const struct lu_env *env,
 269                                        struct ofd_object *fo, struct obdo *oa)
 270 {
 271         struct ofd_device               *ofd    = ofd_obj2dev(fo);
 272         struct ofd_inconsistency_item   *oii;
 273         bool                             wakeup = false;
 274
 275         OBD_ALLOC_PTR(oii);
 276         if (oii == NULL) {
 277                 CERROR("%s: cannot alloc memory for verify OST-object "
 278                        "consistency for "DFID", client given PFID "DFID
 279                        ", local stored PFID "DFID"\n",
 280                        ofd_obd(ofd)->obd_name, PFID(&fo->ofo_header.loh_fid),
 281                        oa->o_parent_seq, oa->o_parent_oid, oa->o_stripe_idx,
 282                        PFID(&fo->ofo_pfid));
 283
 284                 return;
 285         }
 286
 287         INIT_LIST_HEAD(&oii->oii_list);
 288         lu_object_get(&fo->ofo_obj.do_lu);
 289         oii->oii_obj = fo;
 290         oii->oii_pfid.f_seq = oa->o_parent_seq;
 291         oii->oii_pfid.f_oid = oa->o_parent_oid;
 292         oii->oii_pfid.f_stripe_idx = oa->o_stripe_idx;
 293
 294         spin_lock(&ofd->ofd_inconsistency_lock);
 295         if (fo->ofo_pfid_checking || fo->ofo_pfid_verified) {
 296                 spin_unlock(&ofd->ofd_inconsistency_lock);
 297                 OBD_FREE_PTR(oii);
 298
 299                 return;
 300         }
 301
 302         fo->ofo_pfid_checking = 1;
 303         if (list_empty(&ofd->ofd_inconsistency_list))
 304                 wakeup = true;
 305         list_add_tail(&oii->oii_list, &ofd->ofd_inconsistency_list);
 306         spin_unlock(&ofd->ofd_inconsistency_lock);
 307         if (wakeup)
 308                 wake_up_all(&ofd->ofd_inconsistency_thread.t_ctl_waitq);
 309
 310         /* XXX: When the found inconsistency exceeds some threshold,
 311          *      we can trigger the LFSCK to scan part of the system
 312          *      or the whole system, which depends on how to define
 313          *      the threshold, a simple way maybe like that: define
 314          *      the absolute value of how many inconsisteny allowed
 315          *      to be repaired via self detect/repair mechanism, if
 316          *      exceeded, then trigger the LFSCK to scan the layout
 317          *      inconsistency within the whole system. */
 318 }
 319
 320 int ofd_verify_ff(const struct lu_env *env, struct ofd_object *fo,
 321                   struct obdo *oa)
 322 {
 323         struct lu_fid   *pfid   = &fo->ofo_pfid;
 324         int              rc     = 0;
 325         ENTRY;
 326
 327         if (fid_is_sane(pfid)) {
 328                 if (likely(oa->o_parent_seq == pfid->f_seq &&
 329                            oa->o_parent_oid == pfid->f_oid &&
 330                            oa->o_stripe_idx == pfid->f_stripe_idx))
 331                         RETURN(0);
 332
 333                 if (fo->ofo_pfid_verified)
 334                         RETURN(-EPERM);
 335         }
 336
 337         /* The OST-object may be inconsistent, and we need further verification.
 338          * To avoid block the RPC service thread, return -EINPROGRESS to client
 339          * and make it retry later. */
 340         if (fo->ofo_pfid_checking)
 341                 RETURN(-EINPROGRESS);
 342
 343         rc = ofd_object_ff_load(env, fo);
 344         if (rc == -ENODATA)
 345                 RETURN(0);
 346
 347         if (rc < 0)
 348                 RETURN(rc);
 349
 350         if (likely(oa->o_parent_seq == pfid->f_seq &&
 351                    oa->o_parent_oid == pfid->f_oid &&
 352                    oa->o_stripe_idx == pfid->f_stripe_idx))
 353                 RETURN(0);
 354
 355         /* Push it to the dedicated thread for further verification. */
 356         ofd_add_inconsistency_item(env, fo, oa);
 357
 358         RETURN(-EINPROGRESS);
 359 }
 360
 361 static int ofd_preprw_read(const struct lu_env *env, struct obd_export *exp,
 362                            struct ofd_device *ofd, const struct lu_fid *fid,
 363                            struct lu_attr *la, struct obdo *oa, int niocount,
 364                            struct niobuf_remote *rnb, int *nr_local,
 365                            struct niobuf_local *lnb, char *jobid)
 366 {
 367         struct ofd_object       *fo;
 368         int                      i, j, rc, tot_bytes = 0;
 369
 370         ENTRY;
 371         LASSERT(env != NULL);
 372
 373         fo = ofd_object_find(env, ofd, fid);
 374         if (IS_ERR(fo))
 375                 RETURN(PTR_ERR(fo));
 376         LASSERT(fo != NULL);
 377
 378         ofd_read_lock(env, fo);
 379         if (!ofd_object_exists(fo))
 380                 GOTO(unlock, rc = -ENOENT);
 381
 382         if (ofd->ofd_lfsck_verify_pfid && oa->o_valid & OBD_MD_FLFID) {
 383                 rc = ofd_verify_ff(env, fo, oa);
 384                 if (rc != 0)
 385                         GOTO(unlock, rc);
 386         }
 387
 388         /* parse remote buffers to local buffers and prepare the latter */
 389         *nr_local = 0;
 390         for (i = 0, j = 0; i < niocount; i++) {
 391                 rc = dt_bufs_get(env, ofd_object_child(fo), rnb + i,
 392                                  lnb + j, 0, ofd_object_capa(env, fo));
 393                 if (unlikely(rc < 0))
 394                         GOTO(buf_put, rc);
 395                 LASSERT(rc <= PTLRPC_MAX_BRW_PAGES);
 396                 /* correct index for local buffers to continue with */
 397                 j += rc;
 398                 *nr_local += rc;
 399                 LASSERT(j <= PTLRPC_MAX_BRW_PAGES);
 400                 tot_bytes += rnb[i].rnb_len;
 401         }
 402
 403         LASSERT(*nr_local > 0 && *nr_local <= PTLRPC_MAX_BRW_PAGES);
 404         rc = dt_attr_get(env, ofd_object_child(fo), la,
 405                          ofd_object_capa(env, fo));
 406         if (unlikely(rc))
 407                 GOTO(buf_put, rc);
 408
 409         rc = dt_read_prep(env, ofd_object_child(fo), lnb, *nr_local);
 410         if (unlikely(rc))
 411                 GOTO(buf_put, rc);
 412
 413         ofd_counter_incr(exp, LPROC_OFD_STATS_READ, jobid, tot_bytes);
 414         RETURN(0);
 415
 416 buf_put:
 417         dt_bufs_put(env, ofd_object_child(fo), lnb, *nr_local);
 418 unlock:
 419         ofd_read_unlock(env, fo);
 420         ofd_object_put(env, fo);
 421         return rc;
 422 }
 423
 424 static int ofd_preprw_write(const struct lu_env *env, struct obd_export *exp,
 425                             struct ofd_device *ofd, const struct lu_fid *fid,
 426                             struct lu_attr *la, struct obdo *oa,
 427                             int objcount, struct obd_ioobj *obj,
 428                             struct niobuf_remote *rnb, int *nr_local,
 429                             struct niobuf_local *lnb, char *jobid)
 430 {
 431         struct ofd_object       *fo;
 432         int                      i, j, k, rc = 0, tot_bytes = 0;
 433
 434         ENTRY;
 435         LASSERT(env != NULL);
 436         LASSERT(objcount == 1);
 437
 438         if (unlikely(exp->exp_obd->obd_recovering)) {
 439                 obd_seq seq = fid_seq(fid);
 440                 obd_id  oid = fid_oid(fid);
 441                 struct ofd_seq *oseq;
 442
 443                 oseq = ofd_seq_load(env, ofd, seq);
 444                 if (IS_ERR(oseq)) {
 445                         CERROR("%s: Can't find FID Sequence "LPX64": rc = %d\n",
 446                                ofd_name(ofd), seq, (int)PTR_ERR(oseq));
 447                         GOTO(out, rc = -EINVAL);
 448                 }
 449
 450                 if (oid > ofd_seq_last_oid(oseq)) {
 451                         int sync = 0;
 452                         int diff;
 453
 454                         mutex_lock(&oseq->os_create_lock);
 455                         diff = oid - ofd_seq_last_oid(oseq);
 456
 457                         /* Do sync create if the seq is about to used up */
 458                         if (fid_seq_is_idif(seq) || fid_seq_is_mdt0(seq)) {
 459                                 if (unlikely(oid >= IDIF_MAX_OID - 1))
 460                                         sync = 1;
 461                         } else if (fid_seq_is_norm(seq)) {
 462                                 if (unlikely(oid >=
 463                                              LUSTRE_DATA_SEQ_MAX_WIDTH - 1))
 464                                         sync = 1;
 465                         } else {
 466                                 CERROR("%s : invalid o_seq "DOSTID"\n",
 467                                        ofd_name(ofd), POSTID(&oa->o_oi));
 468                                 mutex_unlock(&oseq->os_create_lock);
 469                                 ofd_seq_put(env, oseq);
 470                                 GOTO(out, rc = -EINVAL);
 471                         }
 472
 473                         while (diff > 0) {
 474                                 obd_id next_id = ofd_seq_last_oid(oseq) + 1;
 475                                 int count = ofd_precreate_batch(ofd, diff);
 476
 477                                 rc = ofd_precreate_objects(env, ofd, next_id,
 478                                                            oseq, count, sync);
 479                                 if (rc < 0) {
 480                                         mutex_unlock(&oseq->os_create_lock);
 481                                         ofd_seq_put(env, oseq);
 482                                         GOTO(out, rc);
 483                                 }
 484
 485                                 diff -= rc;
 486                         }
 487
 488                         mutex_unlock(&oseq->os_create_lock);
 489                 }
 490
 491                 ofd_seq_put(env, oseq);
 492         }
 493
 494         fo = ofd_object_find(env, ofd, fid);
 495         if (IS_ERR(fo))
 496                 GOTO(out, rc = PTR_ERR(fo));
 497         LASSERT(fo != NULL);
 498
 499         ofd_read_lock(env, fo);
 500         if (!ofd_object_exists(fo)) {
 501                 CERROR("%s: BRW to missing obj "DOSTID"\n",
 502                        exp->exp_obd->obd_name, POSTID(&obj->ioo_oid));
 503                 ofd_read_unlock(env, fo);
 504                 ofd_object_put(env, fo);
 505                 GOTO(out, rc = -ENOENT);
 506         }
 507
 508         if (ofd->ofd_lfsck_verify_pfid && oa->o_valid & OBD_MD_FLFID) {
 509                 rc = ofd_verify_ff(env, fo, oa);
 510                 if (rc != 0) {
 511                         ofd_read_unlock(env, fo);
 512                         ofd_object_put(env, fo);
 513                         GOTO(out, rc);
 514                 }
 515         }
 516
 517         /* Process incoming grant info, set OBD_BRW_GRANTED flag and grant some
 518          * space back if possible */
 519         ofd_grant_prepare_write(env, exp, oa, rnb, obj->ioo_bufcnt);
 520
 521         /* parse remote buffers to local buffers and prepare the latter */
 522         *nr_local = 0;
 523         for (i = 0, j = 0; i < obj->ioo_bufcnt; i++) {
 524                 rc = dt_bufs_get(env, ofd_object_child(fo),
 525                                  rnb + i, lnb + j, 1,
 526                                  ofd_object_capa(env, fo));
 527                 if (unlikely(rc < 0))
 528                         GOTO(err, rc);
 529                 LASSERT(rc <= PTLRPC_MAX_BRW_PAGES);
 530                 /* correct index for local buffers to continue with */
 531                 for (k = 0; k < rc; k++) {
 532                         lnb[j+k].lnb_flags = rnb[i].rnb_flags;
 533                         if (!(rnb[i].rnb_flags & OBD_BRW_GRANTED))
 534                                 lnb[j+k].lnb_rc = -ENOSPC;
 535
 536                         /* remote client can't break through quota */
 537                         if (exp_connect_rmtclient(exp))
 538                                 lnb[j+k].lnb_flags &= ~OBD_BRW_NOQUOTA;
 539                 }
 540                 j += rc;
 541                 *nr_local += rc;
 542                 LASSERT(j <= PTLRPC_MAX_BRW_PAGES);
 543                 tot_bytes += rnb[i].rnb_len;
 544         }
 545         LASSERT(*nr_local > 0 && *nr_local <= PTLRPC_MAX_BRW_PAGES);
 546
 547         rc = dt_write_prep(env, ofd_object_child(fo), lnb, *nr_local);
 548         if (unlikely(rc != 0))
 549                 GOTO(err, rc);
 550
 551         ofd_counter_incr(exp, LPROC_OFD_STATS_WRITE, jobid, tot_bytes);
 552         RETURN(0);
 553 err:
 554         dt_bufs_put(env, ofd_object_child(fo), lnb, *nr_local);
 555         ofd_read_unlock(env, fo);
 556         /* ofd_grant_prepare_write() was called, so we must commit */
 557         ofd_grant_commit(env, exp, rc);
 558 out:
 559         /* let's still process incoming grant information packed in the oa,
 560          * but without enforcing grant since we won't proceed with the write.
 561          * Just like a read request actually. */
 562         ofd_grant_prepare_read(env, exp, oa);
 563         return rc;
 564 }
 565
 566 int ofd_preprw(const struct lu_env *env, int cmd, struct obd_export *exp,
 567                struct obdo *oa, int objcount, struct obd_ioobj *obj,
 568                struct niobuf_remote *rnb, int *nr_local,
 569                struct niobuf_local *lnb, struct obd_trans_info *oti,
 570                struct lustre_capa *capa)
 571 {
 572         struct tgt_session_info *tsi = tgt_ses_info(env);
 573         struct ofd_device       *ofd = ofd_exp(exp);
 574         struct ofd_thread_info  *info;
 575         char                    *jobid;
 576         const struct lu_fid     *fid = &oa->o_oi.oi_fid;
 577         int                      rc = 0;
 578
 579         if (*nr_local > PTLRPC_MAX_BRW_PAGES) {
 580                 CERROR("%s: bulk has too many pages %d, which exceeds the"
 581                        "maximum pages per RPC of %d\n",
 582                        exp->exp_obd->obd_name, *nr_local, PTLRPC_MAX_BRW_PAGES);
 583                 RETURN(-EPROTO);
 584         }
 585
 586         if (tgt_ses_req(tsi) == NULL) { /* echo client case */
 587                 LASSERT(oti != NULL);
 588                 info = ofd_info_init(env, exp);
 589                 ofd_oti2info(info, oti);
 590                 jobid = oti->oti_jobid;
 591         } else {
 592                 info = tsi2ofd_info(tsi);
 593                 jobid = tsi->tsi_jobid;
 594         }
 595
 596         LASSERT(oa != NULL);
 597
 598         if (OBD_FAIL_CHECK(OBD_FAIL_OST_ENOENT)) {
 599                 struct ofd_seq          *oseq;
 600
 601                 oseq = ofd_seq_load(env, ofd, ostid_seq(&oa->o_oi));
 602                 if (IS_ERR(oseq)) {
 603                         CERROR("%s: Can not find seq for "DOSTID
 604                                ": rc = %ld\n", ofd_name(ofd), POSTID(&oa->o_oi),
 605                                PTR_ERR(oseq));
 606                         RETURN(-EINVAL);
 607                 }
 608
 609                 if (oseq->os_destroys_in_progress == 0) {
 610                         /* don't fail lookups for orphan recovery, it causes
 611                          * later LBUGs when objects still exist during
 612                          * precreate */
 613                         ofd_seq_put(env, oseq);
 614                         RETURN(-ENOENT);
 615                 }
 616                 ofd_seq_put(env, oseq);
 617         }
 618
 619         LASSERT(objcount == 1);
 620         LASSERT(obj->ioo_bufcnt > 0);
 621
 622         if (cmd == OBD_BRW_WRITE) {
 623                 rc = ofd_auth_capa(exp, fid, ostid_seq(&oa->o_oi),
 624                                    capa, CAPA_OPC_OSS_WRITE);
 625                 if (rc == 0) {
 626                         la_from_obdo(&info->fti_attr, oa, OBD_MD_FLGETATTR);
 627                         rc = ofd_preprw_write(env, exp, ofd, fid,
 628                                               &info->fti_attr, oa, objcount,
 629                                               obj, rnb, nr_local, lnb, jobid);
 630                 }
 631         } else if (cmd == OBD_BRW_READ) {
 632                 rc = ofd_auth_capa(exp, fid, ostid_seq(&oa->o_oi),
 633                                    capa, CAPA_OPC_OSS_READ);
 634                 if (rc == 0) {
 635                         ofd_grant_prepare_read(env, exp, oa);
 636                         rc = ofd_preprw_read(env, exp, ofd, fid,
 637                                              &info->fti_attr, oa,
 638                                              obj->ioo_bufcnt, rnb, nr_local,
 639                                              lnb, jobid);
 640                         obdo_from_la(oa, &info->fti_attr, LA_ATIME);
 641                 }
 642         } else {
 643                 CERROR("%s: wrong cmd %d received!\n",
 644                        exp->exp_obd->obd_name, cmd);
 645                 rc = -EPROTO;
 646         }
 647         RETURN(rc);
 648 }
 649
 650 static int
 651 ofd_commitrw_read(const struct lu_env *env, struct ofd_device *ofd,
 652                   const struct lu_fid *fid, int objcount, int niocount,
 653                   struct niobuf_local *lnb)
 654 {
 655         struct ofd_object *fo;
 656
 657         ENTRY;
 658
 659         LASSERT(niocount > 0);
 660
 661         fo = ofd_object_find(env, ofd, fid);
 662         if (IS_ERR(fo))
 663                 RETURN(PTR_ERR(fo));
 664         LASSERT(fo != NULL);
 665         LASSERT(ofd_object_exists(fo));
 666         dt_bufs_put(env, ofd_object_child(fo), lnb, niocount);
 667
 668         ofd_read_unlock(env, fo);
 669         ofd_object_put(env, fo);
 670         /* second put is pair to object_get in ofd_preprw_read */
 671         ofd_object_put(env, fo);
 672
 673         RETURN(0);
 674 }
 675
 676 static int
 677 ofd_write_attr_set(const struct lu_env *env, struct ofd_device *ofd,
 678                    struct ofd_object *ofd_obj, struct lu_attr *la,
 679                    struct filter_fid *ff)
 680 {
 681         struct ofd_thread_info  *info = ofd_info(env);
 682         __u64                    valid = la->la_valid;
 683         int                      rc;
 684         struct thandle          *th;
 685         struct dt_object        *dt_obj;
 686         int                      ff_needed = 0;
 687
 688         ENTRY;
 689
 690         LASSERT(la);
 691
 692         dt_obj = ofd_object_child(ofd_obj);
 693         LASSERT(dt_obj != NULL);
 694
 695         la->la_valid &= LA_UID | LA_GID;
 696
 697         rc = ofd_attr_handle_ugid(env, ofd_obj, la, 0 /* !is_setattr */);
 698         if (rc != 0)
 699                 GOTO(out, rc);
 700
 701         if (ff != NULL) {
 702                 rc = ofd_object_ff_load(env, ofd_obj);
 703                 if (rc == -ENODATA)
 704                         ff_needed = 1;
 705                 else if (rc < 0)
 706                         GOTO(out, rc);
 707         }
 708
 709         if (!la->la_valid && !ff_needed)
 710                 /* no attributes to set */
 711                 GOTO(out, rc = 0);
 712
 713         th = ofd_trans_create(env, ofd);
 714         if (IS_ERR(th))
 715                 GOTO(out, rc = PTR_ERR(th));
 716
 717         if (la->la_valid) {
 718                 rc = dt_declare_attr_set(env, dt_obj, la, th);
 719                 if (rc)
 720                         GOTO(out_tx, rc);
 721         }
 722
 723         if (ff_needed) {
 724                 if (OBD_FAIL_CHECK(OBD_FAIL_LFSCK_UNMATCHED_PAIR1))
 725                         ff->ff_parent.f_oid = cpu_to_le32(1UL << 31);
 726                 if (OBD_FAIL_CHECK(OBD_FAIL_LFSCK_UNMATCHED_PAIR2))
 727                         ff->ff_parent.f_oid =
 728                         cpu_to_le32(le32_to_cpu(ff->ff_parent.f_oid) - 1);
 729
 730                 info->fti_buf.lb_buf = ff;
 731                 info->fti_buf.lb_len = sizeof(*ff);
 732                 rc = dt_declare_xattr_set(env, dt_obj, &info->fti_buf,
 733                                           XATTR_NAME_FID, 0, th);
 734                 if (rc)
 735                         GOTO(out_tx, rc);
 736         }
 737
 738         /* We don't need a transno for this operation which will be re-executed
 739          * anyway when the OST_WRITE (with a transno assigned) is replayed */
 740         rc = dt_trans_start_local(env, ofd->ofd_osd , th);
 741         if (rc)
 742                 GOTO(out_tx, rc);
 743
 744         /* set uid/gid */
 745         if (la->la_valid) {
 746                 rc = dt_attr_set(env, dt_obj, la, th,
 747                                  ofd_object_capa(env, ofd_obj));
 748                 if (rc)
 749                         GOTO(out_tx, rc);
 750         }
 751
 752         /* set filter fid EA */
 753         if (ff_needed) {
 754                 if (OBD_FAIL_CHECK(OBD_FAIL_LFSCK_NOPFID))
 755                         GOTO(out_tx, rc);
 756
 757                 rc = dt_xattr_set(env, dt_obj, &info->fti_buf, XATTR_NAME_FID,
 758                                   0, th, BYPASS_CAPA);
 759                 if (rc == 0) {
 760                         ofd_obj->ofo_pfid.f_seq = le64_to_cpu(ff->ff_parent.f_seq);
 761                         ofd_obj->ofo_pfid.f_oid = le32_to_cpu(ff->ff_parent.f_oid);
 762                         /* Currently, the filter_fid::ff_parent::f_ver is not
 763                          * the real parent MDT-object's FID::f_ver, instead it
 764                          * is the OST-object index in its parent MDT-object's
 765                          * layout EA. */
 766                         ofd_obj->ofo_pfid.f_stripe_idx =
 767                                         le32_to_cpu(ff->ff_parent.f_stripe_idx);
 768                 }
 769         }
 770
 771         GOTO(out_tx, rc);
 772
 773 out_tx:
 774         dt_trans_stop(env, ofd->ofd_osd, th);
 775 out:
 776         la->la_valid = valid;
 777         return rc;
 778 }
 779
 780 struct ofd_soft_sync_callback {
 781         struct dt_txn_commit_cb  ossc_cb;
 782         struct obd_export       *ossc_exp;
 783 };
 784
 785 static void ofd_cb_soft_sync(struct lu_env *env, struct thandle *th,
 786                              struct dt_txn_commit_cb *cb, int err)
 787 {
 788         struct ofd_soft_sync_callback   *ossc;
 789
 790         ossc = container_of(cb, struct ofd_soft_sync_callback, ossc_cb);
 791
 792         CDEBUG(D_INODE, "export %p soft sync count is reset\n", ossc->ossc_exp);
 793         atomic_set(&ossc->ossc_exp->exp_filter_data.fed_soft_sync_count, 0);
 794
 795         class_export_cb_put(ossc->ossc_exp);
 796         OBD_FREE_PTR(ossc);
 797 }
 798
 799 static int ofd_soft_sync_cb_add(struct thandle *th, struct obd_export *exp)
 800 {
 801         struct ofd_soft_sync_callback           *ossc;
 802         struct dt_txn_commit_cb                 *dcb;
 803         int                                      rc;
 804
 805         OBD_ALLOC_PTR(ossc);
 806         if (ossc == NULL)
 807                 return -ENOMEM;
 808
 809         ossc->ossc_exp = class_export_cb_get(exp);
 810
 811         dcb = &ossc->ossc_cb;
 812         dcb->dcb_func = ofd_cb_soft_sync;
 813         CFS_INIT_LIST_HEAD(&dcb->dcb_linkage);
 814         strncpy(dcb->dcb_name, "ofd_cb_soft_sync", MAX_COMMIT_CB_STR_LEN);
 815         dcb->dcb_name[MAX_COMMIT_CB_STR_LEN - 1] = '\0';
 816
 817         rc = dt_trans_cb_add(th, dcb);
 818         if (rc) {
 819                 class_export_cb_put(exp);
 820                 OBD_FREE_PTR(ossc);
 821         }
 822
 823         return rc;
 824 }
 825
 826 static int
 827 ofd_commitrw_write(const struct lu_env *env, struct obd_export *exp,
 828                    struct ofd_device *ofd, const struct lu_fid *fid,
 829                    struct lu_attr *la, struct filter_fid *ff, int objcount,
 830                    int niocount, struct niobuf_local *lnb, int old_rc)
 831 {
 832         struct ofd_thread_info  *info = ofd_info(env);
 833         struct ofd_object       *fo;
 834         struct dt_object        *o;
 835         struct thandle          *th;
 836         int                      rc = 0;
 837         int                      retries = 0;
 838         int                      i;
 839         struct filter_export_data *fed = &exp->exp_filter_data;
 840         bool                     soft_sync = false;
 841         bool                     cb_registered = false;
 842
 843         ENTRY;
 844
 845         LASSERT(objcount == 1);
 846
 847         fo = ofd_object_find(env, ofd, fid);
 848         LASSERT(fo != NULL);
 849         LASSERT(ofd_object_exists(fo));
 850
 851         o = ofd_object_child(fo);
 852         LASSERT(o != NULL);
 853
 854         if (old_rc)
 855                 GOTO(out, rc = old_rc);
 856
 857         /*
 858          * The first write to each object must set some attributes.  It is
 859          * important to set the uid/gid before calling
 860          * dt_declare_write_commit() since quota enforcement is now handled in
 861          * declare phases.
 862          */
 863         rc = ofd_write_attr_set(env, ofd, fo, la, ff);
 864         if (rc)
 865                 GOTO(out, rc);
 866
 867         la->la_valid &= LA_ATIME | LA_MTIME | LA_CTIME;
 868
 869 retry:
 870         th = ofd_trans_create(env, ofd);
 871         if (IS_ERR(th))
 872                 GOTO(out, rc = PTR_ERR(th));
 873
 874         th->th_sync |= ofd->ofd_syncjournal;
 875         if (th->th_sync == 0) {
 876                 for (i = 0; i < niocount; i++) {
 877                         if (!(lnb[i].lnb_flags & OBD_BRW_ASYNC)) {
 878                                 th->th_sync = 1;
 879                                 break;
 880                         }
 881                         if (lnb[i].lnb_flags & OBD_BRW_SOFT_SYNC)
 882                                 soft_sync = true;
 883                 }
 884         }
 885
 886         if (OBD_FAIL_CHECK(OBD_FAIL_OST_DQACQ_NET))
 887                 GOTO(out_stop, rc = -EINPROGRESS);
 888
 889         rc = dt_declare_write_commit(env, o, lnb, niocount, th);
 890         if (rc)
 891                 GOTO(out_stop, rc);
 892
 893         if (la->la_valid) {
 894                 /* update [mac]time if needed */
 895                 rc = dt_declare_attr_set(env, o, la, th);
 896                 if (rc)
 897                         GOTO(out_stop, rc);
 898         }
 899
 900         rc = ofd_trans_start(env, ofd, fo, th);
 901         if (rc)
 902                 GOTO(out_stop, rc);
 903
 904         rc = dt_write_commit(env, o, lnb, niocount, th);
 905         if (rc)
 906                 GOTO(out_stop, rc);
 907
 908         if (la->la_valid) {
 909                 rc = dt_attr_set(env, o, la, th, ofd_object_capa(env, fo));
 910                 if (rc)
 911                         GOTO(out_stop, rc);
 912         }
 913
 914         /* get attr to return */
 915         rc = dt_attr_get(env, o, la, ofd_object_capa(env, fo));
 916
 917 out_stop:
 918         /* Force commit to make the just-deleted blocks
 919          * reusable. LU-456 */
 920         if (rc == -ENOSPC)
 921                 th->th_sync = 1;
 922
 923         /* do this before trans stop in case commit has finished */
 924         if (!th->th_sync && soft_sync && !cb_registered) {
 925                 ofd_soft_sync_cb_add(th, exp);
 926                 cb_registered = true;
 927         }
 928
 929         ofd_trans_stop(env, ofd, th, rc);
 930         if (rc == -ENOSPC && retries++ < 3) {
 931                 CDEBUG(D_INODE, "retry after force commit, retries:%d\n",
 932                        retries);
 933                 goto retry;
 934         }
 935
 936         if (!soft_sync)
 937                 /* reset fed_soft_sync_count upon non-SOFT_SYNC RPC */
 938                 atomic_set(&fed->fed_soft_sync_count, 0);
 939         else if (atomic_inc_return(&fed->fed_soft_sync_count) ==
 940                  ofd->ofd_soft_sync_limit)
 941                 dt_commit_async(env, ofd->ofd_osd);
 942
 943 out:
 944         dt_bufs_put(env, o, lnb, niocount);
 945         ofd_read_unlock(env, fo);
 946         ofd_object_put(env, fo);
 947         /* second put is pair to object_get in ofd_preprw_write */
 948         ofd_object_put(env, fo);
 949         ofd_grant_commit(env, info->fti_exp, old_rc);
 950         RETURN(rc);
 951 }
 952
 953 int ofd_commitrw(const struct lu_env *env, int cmd, struct obd_export *exp,
 954                  struct obdo *oa, int objcount, struct obd_ioobj *obj,
 955                  struct niobuf_remote *rnb, int npages,
 956                  struct niobuf_local *lnb, struct obd_trans_info *oti,
 957                  int old_rc)
 958 {
 959         struct ofd_thread_info  *info = ofd_info(env);
 960         struct ofd_mod_data     *fmd;
 961         __u64                    valid;
 962         struct ofd_device       *ofd = ofd_exp(exp);
 963         struct filter_fid       *ff = NULL;
 964         const struct lu_fid     *fid = &oa->o_oi.oi_fid;
 965         int                      rc = 0;
 966
 967         LASSERT(npages > 0);
 968
 969         if (cmd == OBD_BRW_WRITE) {
 970                 /* Don't update timestamps if this write is older than a
 971                  * setattr which modifies the timestamps. b=10150 */
 972
 973                 /* XXX when we start having persistent reservations this needs
 974                  * to be changed to ofd_fmd_get() to create the fmd if it
 975                  * doesn't already exist so we can store the reservation handle
 976                  * there. */
 977                 valid = OBD_MD_FLUID | OBD_MD_FLGID;
 978                 fmd = ofd_fmd_find(exp, fid);
 979                 if (!fmd || fmd->fmd_mactime_xid < info->fti_xid)
 980                         valid |= OBD_MD_FLATIME | OBD_MD_FLMTIME |
 981                                  OBD_MD_FLCTIME;
 982                 ofd_fmd_put(exp, fmd);
 983                 la_from_obdo(&info->fti_attr, oa, valid);
 984
 985                 if (oa->o_valid & OBD_MD_FLFID) {
 986                         ff = &info->fti_mds_fid;
 987                         ofd_prepare_fidea(ff, oa);
 988                 }
 989
 990                 rc = ofd_commitrw_write(env, exp, ofd, fid, &info->fti_attr,
 991                                         ff, objcount, npages, lnb, old_rc);
 992                 if (rc == 0)
 993                         obdo_from_la(oa, &info->fti_attr,
 994                                      OFD_VALID_FLAGS | LA_GID | LA_UID);
 995                 else
 996                         obdo_from_la(oa, &info->fti_attr, LA_GID | LA_UID);
 997
 998                 /* don't report overquota flag if we failed before reaching
 999                  * commit */
1000                 if (old_rc == 0 && (rc == 0 || rc == -EDQUOT)) {
1001                         /* return the overquota flags to client */
1002                         if (lnb[0].lnb_flags & OBD_BRW_OVER_USRQUOTA) {
1003                                 if (oa->o_valid & OBD_MD_FLFLAGS)
1004                                         oa->o_flags |= OBD_FL_NO_USRQUOTA;
1005                                 else
1006                                         oa->o_flags = OBD_FL_NO_USRQUOTA;
1007                         }
1008
1009                         if (lnb[0].lnb_flags & OBD_BRW_OVER_GRPQUOTA) {
1010                                 if (oa->o_valid & OBD_MD_FLFLAGS)
1011                                         oa->o_flags |= OBD_FL_NO_GRPQUOTA;
1012                                 else
1013                                         oa->o_flags = OBD_FL_NO_GRPQUOTA;
1014                         }
1015
1016                         oa->o_valid |= OBD_MD_FLFLAGS;
1017                         oa->o_valid |= OBD_MD_FLUSRQUOTA | OBD_MD_FLGRPQUOTA;
1018                 }
1019         } else if (cmd == OBD_BRW_READ) {
1020                 struct ldlm_namespace *ns = ofd->ofd_namespace;
1021
1022                 /* If oa != NULL then ofd_preprw_read updated the inode
1023                  * atime and we should update the lvb so that other glimpses
1024                  * will also get the updated value. bug 5972 */
1025                 if (oa && ns && ns->ns_lvbo && ns->ns_lvbo->lvbo_update) {
1026                          struct ldlm_resource *rs = NULL;
1027
1028                         ost_fid_build_resid(fid, &info->fti_resid);
1029                         rs = ldlm_resource_get(ns, NULL, &info->fti_resid,
1030                                                LDLM_EXTENT, 0);
1031                         if (rs != NULL) {
1032                                 ns->ns_lvbo->lvbo_update(rs, NULL, 1);
1033                                 ldlm_resource_putref(rs);
1034                         }
1035                 }
1036                 rc = ofd_commitrw_read(env, ofd, fid, objcount,
1037                                        npages, lnb);
1038                 if (old_rc)
1039                         rc = old_rc;
1040         } else {
1041                 LBUG();
1042                 rc = -EPROTO;
1043         }
1044
1045         if (oti != NULL)
1046                 ofd_info2oti(info, oti);
1047         RETURN(rc);
1048 }