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         struct task_struct      *task;
 220         int                      rc;
 221
 222         spin_lock(&ofd->ofd_inconsistency_lock);
 223         if (unlikely(thread_is_running(thread))) {
 224                 spin_unlock(&ofd->ofd_inconsistency_lock);
 225
 226                 return -EALREADY;
 227         }
 228
 229         thread_set_flags(thread, 0);
 230         spin_unlock(&ofd->ofd_inconsistency_lock);
 231         task = kthread_run(ofd_inconsistency_verification_main, ofd,
 232                            "inconsistency_verification");
 233         if (IS_ERR(task)) {
 234                 rc = PTR_ERR(task);
 235                 CERROR("%s: cannot start self_repair thread: rc = %d\n",
 236                        ofd_obd(ofd)->obd_name, rc);
 237         } else {
 238                 rc = 0;
 239                 l_wait_event(thread->t_ctl_waitq,
 240                              thread_is_running(thread) ||
 241                              thread_is_stopped(thread),
 242                              &lwi);
 243         }
 244
 245         return rc;
 246 }
 247
 248 int ofd_stop_inconsistency_verification_thread(struct ofd_device *ofd)
 249 {
 250         struct ptlrpc_thread    *thread = &ofd->ofd_inconsistency_thread;
 251         struct l_wait_info       lwi    = { 0 };
 252
 253         spin_lock(&ofd->ofd_inconsistency_lock);
 254         if (thread_is_init(thread) || thread_is_stopped(thread)) {
 255                 spin_unlock(&ofd->ofd_inconsistency_lock);
 256
 257                 return -EALREADY;
 258         }
 259
 260         thread_set_flags(thread, SVC_STOPPING);
 261         spin_unlock(&ofd->ofd_inconsistency_lock);
 262         wake_up_all(&thread->t_ctl_waitq);
 263         l_wait_event(thread->t_ctl_waitq,
 264                      thread_is_stopped(thread),
 265                      &lwi);
 266
 267         return 0;
 268 }
 269
 270 static void ofd_add_inconsistency_item(const struct lu_env *env,
 271                                        struct ofd_object *fo, struct obdo *oa)
 272 {
 273         struct ofd_device               *ofd    = ofd_obj2dev(fo);
 274         struct ofd_inconsistency_item   *oii;
 275         bool                             wakeup = false;
 276
 277         OBD_ALLOC_PTR(oii);
 278         if (oii == NULL) {
 279                 CERROR("%s: cannot alloc memory for verify OST-object "
 280                        "consistency for "DFID", client given PFID "DFID
 281                        ", local stored PFID "DFID"\n",
 282                        ofd_obd(ofd)->obd_name, PFID(&fo->ofo_header.loh_fid),
 283                        oa->o_parent_seq, oa->o_parent_oid, oa->o_stripe_idx,
 284                        PFID(&fo->ofo_pfid));
 285
 286                 return;
 287         }
 288
 289         INIT_LIST_HEAD(&oii->oii_list);
 290         lu_object_get(&fo->ofo_obj.do_lu);
 291         oii->oii_obj = fo;
 292         oii->oii_pfid.f_seq = oa->o_parent_seq;
 293         oii->oii_pfid.f_oid = oa->o_parent_oid;
 294         oii->oii_pfid.f_stripe_idx = oa->o_stripe_idx;
 295
 296         spin_lock(&ofd->ofd_inconsistency_lock);
 297         if (fo->ofo_pfid_checking || fo->ofo_pfid_verified) {
 298                 spin_unlock(&ofd->ofd_inconsistency_lock);
 299                 OBD_FREE_PTR(oii);
 300
 301                 return;
 302         }
 303
 304         fo->ofo_pfid_checking = 1;
 305         if (list_empty(&ofd->ofd_inconsistency_list))
 306                 wakeup = true;
 307         list_add_tail(&oii->oii_list, &ofd->ofd_inconsistency_list);
 308         spin_unlock(&ofd->ofd_inconsistency_lock);
 309         if (wakeup)
 310                 wake_up_all(&ofd->ofd_inconsistency_thread.t_ctl_waitq);
 311
 312         /* XXX: When the found inconsistency exceeds some threshold,
 313          *      we can trigger the LFSCK to scan part of the system
 314          *      or the whole system, which depends on how to define
 315          *      the threshold, a simple way maybe like that: define
 316          *      the absolute value of how many inconsisteny allowed
 317          *      to be repaired via self detect/repair mechanism, if
 318          *      exceeded, then trigger the LFSCK to scan the layout
 319          *      inconsistency within the whole system. */
 320 }
 321
 322 int ofd_verify_ff(const struct lu_env *env, struct ofd_object *fo,
 323                   struct obdo *oa)
 324 {
 325         struct lu_fid   *pfid   = &fo->ofo_pfid;
 326         int              rc     = 0;
 327         ENTRY;
 328
 329         if (fid_is_sane(pfid)) {
 330                 if (likely(oa->o_parent_seq == pfid->f_seq &&
 331                            oa->o_parent_oid == pfid->f_oid &&
 332                            oa->o_stripe_idx == pfid->f_stripe_idx))
 333                         RETURN(0);
 334
 335                 if (fo->ofo_pfid_verified)
 336                         RETURN(-EPERM);
 337         }
 338
 339         /* The OST-object may be inconsistent, and we need further verification.
 340          * To avoid block the RPC service thread, return -EINPROGRESS to client
 341          * and make it retry later. */
 342         if (fo->ofo_pfid_checking)
 343                 RETURN(-EINPROGRESS);
 344
 345         rc = ofd_object_ff_load(env, fo);
 346         if (rc == -ENODATA)
 347                 RETURN(0);
 348
 349         if (rc < 0)
 350                 RETURN(rc);
 351
 352         if (likely(oa->o_parent_seq == pfid->f_seq &&
 353                    oa->o_parent_oid == pfid->f_oid &&
 354                    oa->o_stripe_idx == pfid->f_stripe_idx))
 355                 RETURN(0);
 356
 357         /* Push it to the dedicated thread for further verification. */
 358         ofd_add_inconsistency_item(env, fo, oa);
 359
 360         RETURN(-EINPROGRESS);
 361 }
 362
 363 static int ofd_preprw_read(const struct lu_env *env, struct obd_export *exp,
 364                            struct ofd_device *ofd, const struct lu_fid *fid,
 365                            struct lu_attr *la, struct obdo *oa, int niocount,
 366                            struct niobuf_remote *rnb, int *nr_local,
 367                            struct niobuf_local *lnb, char *jobid)
 368 {
 369         struct ofd_object       *fo;
 370         int                      i, j, rc, tot_bytes = 0;
 371
 372         ENTRY;
 373         LASSERT(env != NULL);
 374
 375         fo = ofd_object_find(env, ofd, fid);
 376         if (IS_ERR(fo))
 377                 RETURN(PTR_ERR(fo));
 378         LASSERT(fo != NULL);
 379
 380         ofd_read_lock(env, fo);
 381         if (!ofd_object_exists(fo))
 382                 GOTO(unlock, rc = -ENOENT);
 383
 384         if (ofd->ofd_lfsck_verify_pfid && oa->o_valid & OBD_MD_FLFID) {
 385                 rc = ofd_verify_ff(env, fo, oa);
 386                 if (rc != 0)
 387                         GOTO(unlock, rc);
 388         }
 389
 390         /* parse remote buffers to local buffers and prepare the latter */
 391         *nr_local = 0;
 392         for (i = 0, j = 0; i < niocount; i++) {
 393                 rc = dt_bufs_get(env, ofd_object_child(fo), rnb + i,
 394                                  lnb + j, 0, ofd_object_capa(env, fo));
 395                 if (unlikely(rc < 0))
 396                         GOTO(buf_put, rc);
 397                 LASSERT(rc <= PTLRPC_MAX_BRW_PAGES);
 398                 /* correct index for local buffers to continue with */
 399                 j += rc;
 400                 *nr_local += rc;
 401                 LASSERT(j <= PTLRPC_MAX_BRW_PAGES);
 402                 tot_bytes += rnb[i].rnb_len;
 403         }
 404
 405         LASSERT(*nr_local > 0 && *nr_local <= PTLRPC_MAX_BRW_PAGES);
 406         rc = dt_attr_get(env, ofd_object_child(fo), la,
 407                          ofd_object_capa(env, fo));
 408         if (unlikely(rc))
 409                 GOTO(buf_put, rc);
 410
 411         rc = dt_read_prep(env, ofd_object_child(fo), lnb, *nr_local);
 412         if (unlikely(rc))
 413                 GOTO(buf_put, rc);
 414
 415         ofd_counter_incr(exp, LPROC_OFD_STATS_READ, jobid, tot_bytes);
 416         RETURN(0);
 417
 418 buf_put:
 419         dt_bufs_put(env, ofd_object_child(fo), lnb, *nr_local);
 420 unlock:
 421         ofd_read_unlock(env, fo);
 422         ofd_object_put(env, fo);
 423         return rc;
 424 }
 425
 426 static int ofd_preprw_write(const struct lu_env *env, struct obd_export *exp,
 427                             struct ofd_device *ofd, const struct lu_fid *fid,
 428                             struct lu_attr *la, struct obdo *oa,
 429                             int objcount, struct obd_ioobj *obj,
 430                             struct niobuf_remote *rnb, int *nr_local,
 431                             struct niobuf_local *lnb, char *jobid)
 432 {
 433         struct ofd_object       *fo;
 434         int                      i, j, k, rc = 0, tot_bytes = 0;
 435
 436         ENTRY;
 437         LASSERT(env != NULL);
 438         LASSERT(objcount == 1);
 439
 440         if (unlikely(exp->exp_obd->obd_recovering)) {
 441                 obd_seq seq = fid_seq(fid);
 442                 obd_id  oid = fid_oid(fid);
 443                 struct ofd_seq *oseq;
 444
 445                 oseq = ofd_seq_load(env, ofd, seq);
 446                 if (IS_ERR(oseq)) {
 447                         CERROR("%s: Can't find FID Sequence "LPX64": rc = %d\n",
 448                                ofd_name(ofd), seq, (int)PTR_ERR(oseq));
 449                         GOTO(out, rc = -EINVAL);
 450                 }
 451
 452                 if (oid > ofd_seq_last_oid(oseq)) {
 453                         int sync = 0;
 454                         int diff;
 455
 456                         mutex_lock(&oseq->os_create_lock);
 457                         diff = oid - ofd_seq_last_oid(oseq);
 458
 459                         /* Do sync create if the seq is about to used up */
 460                         if (fid_seq_is_idif(seq) || fid_seq_is_mdt0(seq)) {
 461                                 if (unlikely(oid >= IDIF_MAX_OID - 1))
 462                                         sync = 1;
 463                         } else if (fid_seq_is_norm(seq)) {
 464                                 if (unlikely(oid >=
 465                                              LUSTRE_DATA_SEQ_MAX_WIDTH - 1))
 466                                         sync = 1;
 467                         } else {
 468                                 CERROR("%s : invalid o_seq "DOSTID"\n",
 469                                        ofd_name(ofd), POSTID(&oa->o_oi));
 470                                 mutex_unlock(&oseq->os_create_lock);
 471                                 ofd_seq_put(env, oseq);
 472                                 GOTO(out, rc = -EINVAL);
 473                         }
 474
 475                         while (diff > 0) {
 476                                 obd_id next_id = ofd_seq_last_oid(oseq) + 1;
 477                                 int count = ofd_precreate_batch(ofd, diff);
 478
 479                                 rc = ofd_precreate_objects(env, ofd, next_id,
 480                                                            oseq, count, sync);
 481                                 if (rc < 0) {
 482                                         mutex_unlock(&oseq->os_create_lock);
 483                                         ofd_seq_put(env, oseq);
 484                                         GOTO(out, rc);
 485                                 }
 486
 487                                 diff -= rc;
 488                         }
 489
 490                         mutex_unlock(&oseq->os_create_lock);
 491                 }
 492
 493                 ofd_seq_put(env, oseq);
 494         }
 495
 496         fo = ofd_object_find(env, ofd, fid);
 497         if (IS_ERR(fo))
 498                 GOTO(out, rc = PTR_ERR(fo));
 499         LASSERT(fo != NULL);
 500
 501         ofd_read_lock(env, fo);
 502         if (!ofd_object_exists(fo)) {
 503                 CERROR("%s: BRW to missing obj "DOSTID"\n",
 504                        exp->exp_obd->obd_name, POSTID(&obj->ioo_oid));
 505                 ofd_read_unlock(env, fo);
 506                 ofd_object_put(env, fo);
 507                 GOTO(out, rc = -ENOENT);
 508         }
 509
 510         if (ofd->ofd_lfsck_verify_pfid && oa->o_valid & OBD_MD_FLFID) {
 511                 rc = ofd_verify_ff(env, fo, oa);
 512                 if (rc != 0) {
 513                         ofd_read_unlock(env, fo);
 514                         ofd_object_put(env, fo);
 515                         GOTO(out, rc);
 516                 }
 517         }
 518
 519         /* Process incoming grant info, set OBD_BRW_GRANTED flag and grant some
 520          * space back if possible */
 521         ofd_grant_prepare_write(env, exp, oa, rnb, obj->ioo_bufcnt);
 522
 523         /* parse remote buffers to local buffers and prepare the latter */
 524         *nr_local = 0;
 525         for (i = 0, j = 0; i < obj->ioo_bufcnt; i++) {
 526                 rc = dt_bufs_get(env, ofd_object_child(fo),
 527                                  rnb + i, lnb + j, 1,
 528                                  ofd_object_capa(env, fo));
 529                 if (unlikely(rc < 0))
 530                         GOTO(err, rc);
 531                 LASSERT(rc <= PTLRPC_MAX_BRW_PAGES);
 532                 /* correct index for local buffers to continue with */
 533                 for (k = 0; k < rc; k++) {
 534                         lnb[j+k].lnb_flags = rnb[i].rnb_flags;
 535                         if (!(rnb[i].rnb_flags & OBD_BRW_GRANTED))
 536                                 lnb[j+k].lnb_rc = -ENOSPC;
 537
 538                         /* remote client can't break through quota */
 539                         if (exp_connect_rmtclient(exp))
 540                                 lnb[j+k].lnb_flags &= ~OBD_BRW_NOQUOTA;
 541                 }
 542                 j += rc;
 543                 *nr_local += rc;
 544                 LASSERT(j <= PTLRPC_MAX_BRW_PAGES);
 545                 tot_bytes += rnb[i].rnb_len;
 546         }
 547         LASSERT(*nr_local > 0 && *nr_local <= PTLRPC_MAX_BRW_PAGES);
 548
 549         rc = dt_write_prep(env, ofd_object_child(fo), lnb, *nr_local);
 550         if (unlikely(rc != 0))
 551                 GOTO(err, rc);
 552
 553         ofd_counter_incr(exp, LPROC_OFD_STATS_WRITE, jobid, tot_bytes);
 554         RETURN(0);
 555 err:
 556         dt_bufs_put(env, ofd_object_child(fo), lnb, *nr_local);
 557         ofd_read_unlock(env, fo);
 558         /* ofd_grant_prepare_write() was called, so we must commit */
 559         ofd_grant_commit(env, exp, rc);
 560 out:
 561         /* let's still process incoming grant information packed in the oa,
 562          * but without enforcing grant since we won't proceed with the write.
 563          * Just like a read request actually. */
 564         ofd_grant_prepare_read(env, exp, oa);
 565         return rc;
 566 }
 567
 568 int ofd_preprw(const struct lu_env *env, int cmd, struct obd_export *exp,
 569                struct obdo *oa, int objcount, struct obd_ioobj *obj,
 570                struct niobuf_remote *rnb, int *nr_local,
 571                struct niobuf_local *lnb, struct obd_trans_info *oti,
 572                struct lustre_capa *capa)
 573 {
 574         struct tgt_session_info *tsi = tgt_ses_info(env);
 575         struct ofd_device       *ofd = ofd_exp(exp);
 576         struct ofd_thread_info  *info;
 577         char                    *jobid;
 578         const struct lu_fid     *fid = &oa->o_oi.oi_fid;
 579         int                      rc = 0;
 580
 581         if (*nr_local > PTLRPC_MAX_BRW_PAGES) {
 582                 CERROR("%s: bulk has too many pages %d, which exceeds the"
 583                        "maximum pages per RPC of %d\n",
 584                        exp->exp_obd->obd_name, *nr_local, PTLRPC_MAX_BRW_PAGES);
 585                 RETURN(-EPROTO);
 586         }
 587
 588         if (tgt_ses_req(tsi) == NULL) { /* echo client case */
 589                 LASSERT(oti != NULL);
 590                 info = ofd_info_init(env, exp);
 591                 ofd_oti2info(info, oti);
 592                 jobid = oti->oti_jobid;
 593         } else {
 594                 info = tsi2ofd_info(tsi);
 595                 jobid = tsi->tsi_jobid;
 596         }
 597
 598         LASSERT(oa != NULL);
 599
 600         if (OBD_FAIL_CHECK(OBD_FAIL_OST_ENOENT)) {
 601                 struct ofd_seq          *oseq;
 602
 603                 oseq = ofd_seq_load(env, ofd, ostid_seq(&oa->o_oi));
 604                 if (IS_ERR(oseq)) {
 605                         CERROR("%s: Can not find seq for "DOSTID
 606                                ": rc = %ld\n", ofd_name(ofd), POSTID(&oa->o_oi),
 607                                PTR_ERR(oseq));
 608                         RETURN(-EINVAL);
 609                 }
 610
 611                 if (oseq->os_destroys_in_progress == 0) {
 612                         /* don't fail lookups for orphan recovery, it causes
 613                          * later LBUGs when objects still exist during
 614                          * precreate */
 615                         ofd_seq_put(env, oseq);
 616                         RETURN(-ENOENT);
 617                 }
 618                 ofd_seq_put(env, oseq);
 619         }
 620
 621         LASSERT(objcount == 1);
 622         LASSERT(obj->ioo_bufcnt > 0);
 623
 624         if (cmd == OBD_BRW_WRITE) {
 625                 rc = ofd_auth_capa(exp, fid, ostid_seq(&oa->o_oi),
 626                                    capa, CAPA_OPC_OSS_WRITE);
 627                 if (rc == 0) {
 628                         la_from_obdo(&info->fti_attr, oa, OBD_MD_FLGETATTR);
 629                         rc = ofd_preprw_write(env, exp, ofd, fid,
 630                                               &info->fti_attr, oa, objcount,
 631                                               obj, rnb, nr_local, lnb, jobid);
 632                 }
 633         } else if (cmd == OBD_BRW_READ) {
 634                 rc = ofd_auth_capa(exp, fid, ostid_seq(&oa->o_oi),
 635                                    capa, CAPA_OPC_OSS_READ);
 636                 if (rc == 0) {
 637                         ofd_grant_prepare_read(env, exp, oa);
 638                         rc = ofd_preprw_read(env, exp, ofd, fid,
 639                                              &info->fti_attr, oa,
 640                                              obj->ioo_bufcnt, rnb, nr_local,
 641                                              lnb, jobid);
 642                         obdo_from_la(oa, &info->fti_attr, LA_ATIME);
 643                 }
 644         } else {
 645                 CERROR("%s: wrong cmd %d received!\n",
 646                        exp->exp_obd->obd_name, cmd);
 647                 rc = -EPROTO;
 648         }
 649         RETURN(rc);
 650 }
 651
 652 static int
 653 ofd_commitrw_read(const struct lu_env *env, struct ofd_device *ofd,
 654                   const struct lu_fid *fid, int objcount, int niocount,
 655                   struct niobuf_local *lnb)
 656 {
 657         struct ofd_object *fo;
 658
 659         ENTRY;
 660
 661         LASSERT(niocount > 0);
 662
 663         fo = ofd_object_find(env, ofd, fid);
 664         if (IS_ERR(fo))
 665                 RETURN(PTR_ERR(fo));
 666         LASSERT(fo != NULL);
 667         LASSERT(ofd_object_exists(fo));
 668         dt_bufs_put(env, ofd_object_child(fo), lnb, niocount);
 669
 670         ofd_read_unlock(env, fo);
 671         ofd_object_put(env, fo);
 672         /* second put is pair to object_get in ofd_preprw_read */
 673         ofd_object_put(env, fo);
 674
 675         RETURN(0);
 676 }
 677
 678 static int
 679 ofd_write_attr_set(const struct lu_env *env, struct ofd_device *ofd,
 680                    struct ofd_object *ofd_obj, struct lu_attr *la,
 681                    struct filter_fid *ff)
 682 {
 683         struct ofd_thread_info  *info = ofd_info(env);
 684         __u64                    valid = la->la_valid;
 685         int                      rc;
 686         struct thandle          *th;
 687         struct dt_object        *dt_obj;
 688         int                      ff_needed = 0;
 689
 690         ENTRY;
 691
 692         LASSERT(la);
 693
 694         dt_obj = ofd_object_child(ofd_obj);
 695         LASSERT(dt_obj != NULL);
 696
 697         la->la_valid &= LA_UID | LA_GID;
 698
 699         rc = ofd_attr_handle_ugid(env, ofd_obj, la, 0 /* !is_setattr */);
 700         if (rc != 0)
 701                 GOTO(out, rc);
 702
 703         if (ff != NULL) {
 704                 rc = ofd_object_ff_load(env, ofd_obj);
 705                 if (rc == -ENODATA)
 706                         ff_needed = 1;
 707                 else if (rc < 0)
 708                         GOTO(out, rc);
 709         }
 710
 711         if (!la->la_valid && !ff_needed)
 712                 /* no attributes to set */
 713                 GOTO(out, rc = 0);
 714
 715         th = ofd_trans_create(env, ofd);
 716         if (IS_ERR(th))
 717                 GOTO(out, rc = PTR_ERR(th));
 718
 719         if (la->la_valid) {
 720                 rc = dt_declare_attr_set(env, dt_obj, la, th);
 721                 if (rc)
 722                         GOTO(out_tx, rc);
 723         }
 724
 725         if (ff_needed) {
 726                 if (OBD_FAIL_CHECK(OBD_FAIL_LFSCK_UNMATCHED_PAIR1))
 727                         ff->ff_parent.f_oid = cpu_to_le32(1UL << 31);
 728                 if (OBD_FAIL_CHECK(OBD_FAIL_LFSCK_UNMATCHED_PAIR2))
 729                         ff->ff_parent.f_oid =
 730                         cpu_to_le32(le32_to_cpu(ff->ff_parent.f_oid) - 1);
 731
 732                 info->fti_buf.lb_buf = ff;
 733                 info->fti_buf.lb_len = sizeof(*ff);
 734                 rc = dt_declare_xattr_set(env, dt_obj, &info->fti_buf,
 735                                           XATTR_NAME_FID, 0, th);
 736                 if (rc)
 737                         GOTO(out_tx, rc);
 738         }
 739
 740         /* We don't need a transno for this operation which will be re-executed
 741          * anyway when the OST_WRITE (with a transno assigned) is replayed */
 742         rc = dt_trans_start_local(env, ofd->ofd_osd , th);
 743         if (rc)
 744                 GOTO(out_tx, rc);
 745
 746         /* set uid/gid */
 747         if (la->la_valid) {
 748                 rc = dt_attr_set(env, dt_obj, la, th,
 749                                  ofd_object_capa(env, ofd_obj));
 750                 if (rc)
 751                         GOTO(out_tx, rc);
 752         }
 753
 754         /* set filter fid EA */
 755         if (ff_needed) {
 756                 if (OBD_FAIL_CHECK(OBD_FAIL_LFSCK_NOPFID))
 757                         GOTO(out_tx, rc);
 758
 759                 rc = dt_xattr_set(env, dt_obj, &info->fti_buf, XATTR_NAME_FID,
 760                                   0, th, BYPASS_CAPA);
 761                 if (rc == 0) {
 762                         ofd_obj->ofo_pfid.f_seq = le64_to_cpu(ff->ff_parent.f_seq);
 763                         ofd_obj->ofo_pfid.f_oid = le32_to_cpu(ff->ff_parent.f_oid);
 764                         /* Currently, the filter_fid::ff_parent::f_ver is not
 765                          * the real parent MDT-object's FID::f_ver, instead it
 766                          * is the OST-object index in its parent MDT-object's
 767                          * layout EA. */
 768                         ofd_obj->ofo_pfid.f_stripe_idx =
 769                                         le32_to_cpu(ff->ff_parent.f_stripe_idx);
 770                 }
 771         }
 772
 773         GOTO(out_tx, rc);
 774
 775 out_tx:
 776         dt_trans_stop(env, ofd->ofd_osd, th);
 777 out:
 778         la->la_valid = valid;
 779         return rc;
 780 }
 781
 782 struct ofd_soft_sync_callback {
 783         struct dt_txn_commit_cb  ossc_cb;
 784         struct obd_export       *ossc_exp;
 785 };
 786
 787 static void ofd_cb_soft_sync(struct lu_env *env, struct thandle *th,
 788                              struct dt_txn_commit_cb *cb, int err)
 789 {
 790         struct ofd_soft_sync_callback   *ossc;
 791
 792         ossc = container_of(cb, struct ofd_soft_sync_callback, ossc_cb);
 793
 794         CDEBUG(D_INODE, "export %p soft sync count is reset\n", ossc->ossc_exp);
 795         atomic_set(&ossc->ossc_exp->exp_filter_data.fed_soft_sync_count, 0);
 796
 797         class_export_cb_put(ossc->ossc_exp);
 798         OBD_FREE_PTR(ossc);
 799 }
 800
 801 static int ofd_soft_sync_cb_add(struct thandle *th, struct obd_export *exp)
 802 {
 803         struct ofd_soft_sync_callback           *ossc;
 804         struct dt_txn_commit_cb                 *dcb;
 805         int                                      rc;
 806
 807         OBD_ALLOC_PTR(ossc);
 808         if (ossc == NULL)
 809                 return -ENOMEM;
 810
 811         ossc->ossc_exp = class_export_cb_get(exp);
 812
 813         dcb = &ossc->ossc_cb;
 814         dcb->dcb_func = ofd_cb_soft_sync;
 815         CFS_INIT_LIST_HEAD(&dcb->dcb_linkage);
 816         strncpy(dcb->dcb_name, "ofd_cb_soft_sync", MAX_COMMIT_CB_STR_LEN);
 817         dcb->dcb_name[MAX_COMMIT_CB_STR_LEN - 1] = '\0';
 818
 819         rc = dt_trans_cb_add(th, dcb);
 820         if (rc) {
 821                 class_export_cb_put(exp);
 822                 OBD_FREE_PTR(ossc);
 823         }
 824
 825         return rc;
 826 }
 827
 828 static int
 829 ofd_commitrw_write(const struct lu_env *env, struct obd_export *exp,
 830                    struct ofd_device *ofd, const struct lu_fid *fid,
 831                    struct lu_attr *la, struct filter_fid *ff, int objcount,
 832                    int niocount, struct niobuf_local *lnb, int old_rc)
 833 {
 834         struct ofd_thread_info  *info = ofd_info(env);
 835         struct ofd_object       *fo;
 836         struct dt_object        *o;
 837         struct thandle          *th;
 838         int                      rc = 0;
 839         int                      retries = 0;
 840         int                      i;
 841         struct filter_export_data *fed = &exp->exp_filter_data;
 842         bool                     soft_sync = false;
 843         bool                     cb_registered = false;
 844
 845         ENTRY;
 846
 847         LASSERT(objcount == 1);
 848
 849         fo = ofd_object_find(env, ofd, fid);
 850         LASSERT(fo != NULL);
 851         LASSERT(ofd_object_exists(fo));
 852
 853         o = ofd_object_child(fo);
 854         LASSERT(o != NULL);
 855
 856         if (old_rc)
 857                 GOTO(out, rc = old_rc);
 858
 859         /*
 860          * The first write to each object must set some attributes.  It is
 861          * important to set the uid/gid before calling
 862          * dt_declare_write_commit() since quota enforcement is now handled in
 863          * declare phases.
 864          */
 865         rc = ofd_write_attr_set(env, ofd, fo, la, ff);
 866         if (rc)
 867                 GOTO(out, rc);
 868
 869         la->la_valid &= LA_ATIME | LA_MTIME | LA_CTIME;
 870
 871 retry:
 872         th = ofd_trans_create(env, ofd);
 873         if (IS_ERR(th))
 874                 GOTO(out, rc = PTR_ERR(th));
 875
 876         th->th_sync |= ofd->ofd_syncjournal;
 877         if (th->th_sync == 0) {
 878                 for (i = 0; i < niocount; i++) {
 879                         if (!(lnb[i].lnb_flags & OBD_BRW_ASYNC)) {
 880                                 th->th_sync = 1;
 881                                 break;
 882                         }
 883                         if (lnb[i].lnb_flags & OBD_BRW_SOFT_SYNC)
 884                                 soft_sync = true;
 885                 }
 886         }
 887
 888         if (OBD_FAIL_CHECK(OBD_FAIL_OST_DQACQ_NET))
 889                 GOTO(out_stop, rc = -EINPROGRESS);
 890
 891         rc = dt_declare_write_commit(env, o, lnb, niocount, th);
 892         if (rc)
 893                 GOTO(out_stop, rc);
 894
 895         if (la->la_valid) {
 896                 /* update [mac]time if needed */
 897                 rc = dt_declare_attr_set(env, o, la, th);
 898                 if (rc)
 899                         GOTO(out_stop, rc);
 900         }
 901
 902         rc = ofd_trans_start(env, ofd, fo, th);
 903         if (rc)
 904                 GOTO(out_stop, rc);
 905
 906         rc = dt_write_commit(env, o, lnb, niocount, th);
 907         if (rc)
 908                 GOTO(out_stop, rc);
 909
 910         if (la->la_valid) {
 911                 rc = dt_attr_set(env, o, la, th, ofd_object_capa(env, fo));
 912                 if (rc)
 913                         GOTO(out_stop, rc);
 914         }
 915
 916         /* get attr to return */
 917         rc = dt_attr_get(env, o, la, ofd_object_capa(env, fo));
 918
 919 out_stop:
 920         /* Force commit to make the just-deleted blocks
 921          * reusable. LU-456 */
 922         if (rc == -ENOSPC)
 923                 th->th_sync = 1;
 924
 925         /* do this before trans stop in case commit has finished */
 926         if (!th->th_sync && soft_sync && !cb_registered) {
 927                 ofd_soft_sync_cb_add(th, exp);
 928                 cb_registered = true;
 929         }
 930
 931         ofd_trans_stop(env, ofd, th, rc);
 932         if (rc == -ENOSPC && retries++ < 3) {
 933                 CDEBUG(D_INODE, "retry after force commit, retries:%d\n",
 934                        retries);
 935                 goto retry;
 936         }
 937
 938         if (!soft_sync)
 939                 /* reset fed_soft_sync_count upon non-SOFT_SYNC RPC */
 940                 atomic_set(&fed->fed_soft_sync_count, 0);
 941         else if (atomic_inc_return(&fed->fed_soft_sync_count) ==
 942                  ofd->ofd_soft_sync_limit)
 943                 dt_commit_async(env, ofd->ofd_osd);
 944
 945 out:
 946         dt_bufs_put(env, o, lnb, niocount);
 947         ofd_read_unlock(env, fo);
 948         ofd_object_put(env, fo);
 949         /* second put is pair to object_get in ofd_preprw_write */
 950         ofd_object_put(env, fo);
 951         ofd_grant_commit(env, info->fti_exp, old_rc);
 952         RETURN(rc);
 953 }
 954
 955 int ofd_commitrw(const struct lu_env *env, int cmd, struct obd_export *exp,
 956                  struct obdo *oa, int objcount, struct obd_ioobj *obj,
 957                  struct niobuf_remote *rnb, int npages,
 958                  struct niobuf_local *lnb, struct obd_trans_info *oti,
 959                  int old_rc)
 960 {
 961         struct ofd_thread_info  *info = ofd_info(env);
 962         struct ofd_mod_data     *fmd;
 963         __u64                    valid;
 964         struct ofd_device       *ofd = ofd_exp(exp);
 965         struct filter_fid       *ff = NULL;
 966         const struct lu_fid     *fid = &oa->o_oi.oi_fid;
 967         int                      rc = 0;
 968
 969         LASSERT(npages > 0);
 970
 971         if (cmd == OBD_BRW_WRITE) {
 972                 /* Don't update timestamps if this write is older than a
 973                  * setattr which modifies the timestamps. b=10150 */
 974
 975                 /* XXX when we start having persistent reservations this needs
 976                  * to be changed to ofd_fmd_get() to create the fmd if it
 977                  * doesn't already exist so we can store the reservation handle
 978                  * there. */
 979                 valid = OBD_MD_FLUID | OBD_MD_FLGID;
 980                 fmd = ofd_fmd_find(exp, fid);
 981                 if (!fmd || fmd->fmd_mactime_xid < info->fti_xid)
 982                         valid |= OBD_MD_FLATIME | OBD_MD_FLMTIME |
 983                                  OBD_MD_FLCTIME;
 984                 ofd_fmd_put(exp, fmd);
 985                 la_from_obdo(&info->fti_attr, oa, valid);
 986
 987                 if (oa->o_valid & OBD_MD_FLFID) {
 988                         ff = &info->fti_mds_fid;
 989                         ofd_prepare_fidea(ff, oa);
 990                 }
 991
 992                 rc = ofd_commitrw_write(env, exp, ofd, fid, &info->fti_attr,
 993                                         ff, objcount, npages, lnb, old_rc);
 994                 if (rc == 0)
 995                         obdo_from_la(oa, &info->fti_attr,
 996                                      OFD_VALID_FLAGS | LA_GID | LA_UID);
 997                 else
 998                         obdo_from_la(oa, &info->fti_attr, LA_GID | LA_UID);
 999
1000                 /* don't report overquota flag if we failed before reaching
1001                  * commit */
1002                 if (old_rc == 0 && (rc == 0 || rc == -EDQUOT)) {
1003                         /* return the overquota flags to client */
1004                         if (lnb[0].lnb_flags & OBD_BRW_OVER_USRQUOTA) {
1005                                 if (oa->o_valid & OBD_MD_FLFLAGS)
1006                                         oa->o_flags |= OBD_FL_NO_USRQUOTA;
1007                                 else
1008                                         oa->o_flags = OBD_FL_NO_USRQUOTA;
1009                         }
1010
1011                         if (lnb[0].lnb_flags & OBD_BRW_OVER_GRPQUOTA) {
1012                                 if (oa->o_valid & OBD_MD_FLFLAGS)
1013                                         oa->o_flags |= OBD_FL_NO_GRPQUOTA;
1014                                 else
1015                                         oa->o_flags = OBD_FL_NO_GRPQUOTA;
1016                         }
1017
1018                         oa->o_valid |= OBD_MD_FLFLAGS;
1019                         oa->o_valid |= OBD_MD_FLUSRQUOTA | OBD_MD_FLGRPQUOTA;
1020                 }
1021         } else if (cmd == OBD_BRW_READ) {
1022                 struct ldlm_namespace *ns = ofd->ofd_namespace;
1023
1024                 /* If oa != NULL then ofd_preprw_read updated the inode
1025                  * atime and we should update the lvb so that other glimpses
1026                  * will also get the updated value. bug 5972 */
1027                 if (oa && ns && ns->ns_lvbo && ns->ns_lvbo->lvbo_update) {
1028                          struct ldlm_resource *rs = NULL;
1029
1030                         ost_fid_build_resid(fid, &info->fti_resid);
1031                         rs = ldlm_resource_get(ns, NULL, &info->fti_resid,
1032                                                LDLM_EXTENT, 0);
1033                         if (rs != NULL) {
1034                                 ns->ns_lvbo->lvbo_update(rs, NULL, 1);
1035                                 ldlm_resource_putref(rs);
1036                         }
1037                 }
1038                 rc = ofd_commitrw_read(env, ofd, fid, objcount,
1039                                        npages, lnb);
1040                 if (old_rc)
1041                         rc = old_rc;
1042         } else {
1043                 LBUG();
1044                 rc = -EPROTO;
1045         }
1046
1047         if (oti != NULL)
1048                 ofd_info2oti(info, oti);
1049         RETURN(rc);
1050 }