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