lustre/lmv/lmv_obd.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.gnu.org/licenses/gpl-2.0.html
  19  *
  20  * GPL HEADER END
  21  */
  22 /*
  23  * Copyright (c) 2004, 2010, Oracle and/or its affiliates. All rights reserved.
  24  * Use is subject to license terms.
  25  *
  26  * Copyright (c) 2011, 2017, Intel Corporation.
  27  */
  28 /*
  29  * This file is part of Lustre, http://www.lustre.org/
  30  * Lustre is a trademark of Sun Microsystems, Inc.
  31  */
  32
  33 #define DEBUG_SUBSYSTEM S_LMV
  34
  35 #include <linux/file.h>
  36 #include <linux/module.h>
  37 #include <linux/init.h>
  38 #include <linux/user_namespace.h>
  39 #include <linux/uidgid.h>
  40 #include <linux/slab.h>
  41 #include <linux/pagemap.h>
  42 #include <linux/mm.h>
  43 #include <linux/math64.h>
  44 #include <linux/seq_file.h>
  45 #include <linux/namei.h>
  46
  47 #include <obd_support.h>
  48 #include <lustre_lib.h>
  49 #include <lustre_net.h>
  50 #include <obd_class.h>
  51 #include <lustre_lmv.h>
  52 #include <lprocfs_status.h>
  53 #include <cl_object.h>
  54 #include <lustre_fid.h>
  55 #include <uapi/linux/lustre/lustre_ioctl.h>
  56 #include <lustre_kernelcomm.h>
  57 #include "lmv_internal.h"
  58
  59 static int lmv_check_connect(struct obd_device *obd);
  60
  61 void lmv_activate_target(struct lmv_obd *lmv, struct lmv_tgt_desc *tgt,
  62                          int activate)
  63 {
  64         if (tgt->ltd_active == activate)
  65                 return;
  66
  67         tgt->ltd_active = activate;
  68         lmv->lmv_mdt_descs.ltd_lmv_desc.ld_active_tgt_count +=
  69                 (activate ? 1 : -1);
  70
  71         tgt->ltd_exp->exp_obd->obd_inactive = !activate;
  72 }
  73
  74 /**
  75  * Error codes:
  76  *
  77  *  -EINVAL  : UUID can't be found in the LMV's target list
  78  *  -ENOTCONN: The UUID is found, but the target connection is bad (!)
  79  *  -EBADF   : The UUID is found, but the OBD of the wrong type (!)
  80  */
  81 static int lmv_set_mdc_active(struct lmv_obd *lmv,
  82                               const struct obd_uuid *uuid,
  83                               int activate)
  84 {
  85         struct lu_tgt_desc *tgt = NULL;
  86         struct obd_device *obd;
  87         int rc = 0;
  88
  89         ENTRY;
  90
  91         CDEBUG(D_INFO, "Searching in lmv %p for uuid %s (activate=%d)\n",
  92                         lmv, uuid->uuid, activate);
  93
  94         spin_lock(&lmv->lmv_lock);
  95         lmv_foreach_connected_tgt(lmv, tgt) {
  96                 CDEBUG(D_INFO, "Target idx %d is %s conn %#llx\n",
  97                        tgt->ltd_index, tgt->ltd_uuid.uuid,
  98                        tgt->ltd_exp->exp_handle.h_cookie);
  99
 100                 if (obd_uuid_equals(uuid, &tgt->ltd_uuid))
 101                         break;
 102         }
 103
 104         if (!tgt)
 105                 GOTO(out_lmv_lock, rc = -EINVAL);
 106
 107         obd = class_exp2obd(tgt->ltd_exp);
 108         if (obd == NULL)
 109                 GOTO(out_lmv_lock, rc = -ENOTCONN);
 110
 111         CDEBUG(D_INFO, "Found OBD %s=%s device %d (%p) type %s at LMV idx %d\n",
 112                obd->obd_name, obd->obd_uuid.uuid, obd->obd_minor, obd,
 113                obd->obd_type->typ_name, tgt->ltd_index);
 114         LASSERT(strcmp(obd->obd_type->typ_name, LUSTRE_MDC_NAME) == 0);
 115
 116         if (tgt->ltd_active == activate) {
 117                 CDEBUG(D_INFO, "OBD %p already %sactive!\n", obd,
 118                        activate ? "" : "in");
 119                 GOTO(out_lmv_lock, rc);
 120         }
 121
 122         CDEBUG(D_INFO, "Marking OBD %p %sactive\n", obd,
 123                activate ? "" : "in");
 124         lmv_activate_target(lmv, tgt, activate);
 125         EXIT;
 126
 127  out_lmv_lock:
 128         spin_unlock(&lmv->lmv_lock);
 129         return rc;
 130 }
 131
 132 struct obd_uuid *lmv_get_uuid(struct obd_export *exp)
 133 {
 134         struct lmv_obd *lmv = &exp->exp_obd->u.lmv;
 135         struct lmv_tgt_desc *tgt = lmv_tgt(lmv, 0);
 136
 137         return (tgt == NULL) ? NULL : obd_get_uuid(tgt->ltd_exp);
 138 }
 139
 140 static int lmv_notify(struct obd_device *obd, struct obd_device *watched,
 141                       enum obd_notify_event ev)
 142 {
 143         struct obd_connect_data *conn_data;
 144         struct lmv_obd          *lmv = &obd->u.lmv;
 145         struct obd_uuid         *uuid;
 146         int                      rc = 0;
 147         ENTRY;
 148
 149         if (strcmp(watched->obd_type->typ_name, LUSTRE_MDC_NAME)) {
 150                 CERROR("unexpected notification of %s %s!\n",
 151                        watched->obd_type->typ_name,
 152                        watched->obd_name);
 153                 RETURN(-EINVAL);
 154         }
 155
 156         uuid = &watched->u.cli.cl_target_uuid;
 157         if (ev == OBD_NOTIFY_ACTIVE || ev == OBD_NOTIFY_INACTIVE) {
 158                 /*
 159                  * Set MDC as active before notifying the observer, so the
 160                  * observer can use the MDC normally.
 161                  */
 162                 rc = lmv_set_mdc_active(lmv, uuid,
 163                                         ev == OBD_NOTIFY_ACTIVE);
 164                 if (rc) {
 165                         CERROR("%sactivation of %s failed: %d\n",
 166                                ev == OBD_NOTIFY_ACTIVE ? "" : "de",
 167                                uuid->uuid, rc);
 168                         RETURN(rc);
 169                 }
 170         } else if (ev == OBD_NOTIFY_OCD) {
 171                 conn_data = &watched->u.cli.cl_import->imp_connect_data;
 172                 /*
 173                  * XXX: Make sure that ocd_connect_flags from all targets are
 174                  * the same. Otherwise one of MDTs runs wrong version or
 175                  * something like this.  --umka
 176                  */
 177                 obd->obd_self_export->exp_connect_data = *conn_data;
 178         }
 179
 180         /*
 181          * Pass the notification up the chain.
 182          */
 183         if (obd->obd_observer)
 184                 rc = obd_notify(obd->obd_observer, watched, ev);
 185
 186         RETURN(rc);
 187 }
 188
 189 static int lmv_connect(const struct lu_env *env,
 190                        struct obd_export **pexp, struct obd_device *obd,
 191                        struct obd_uuid *cluuid, struct obd_connect_data *data,
 192                        void *localdata)
 193 {
 194         struct lmv_obd *lmv = &obd->u.lmv;
 195         struct lustre_handle conn = { 0 };
 196         struct obd_export *exp;
 197         int rc;
 198         ENTRY;
 199
 200         rc = class_connect(&conn, obd, cluuid);
 201         if (rc) {
 202                 CERROR("class_connection() returned %d\n", rc);
 203                 RETURN(rc);
 204         }
 205
 206         exp = class_conn2export(&conn);
 207
 208         lmv->connected = 0;
 209         lmv->conn_data = *data;
 210         lmv->lmv_cache = localdata;
 211
 212         lmv->lmv_tgts_kobj = kobject_create_and_add("target_obds",
 213                                                     &obd->obd_kset.kobj);
 214         if (!lmv->lmv_tgts_kobj) {
 215                 CERROR("%s: cannot create /sys/fs/lustre/%s/%s/target_obds\n",
 216                        obd->obd_name, obd->obd_type->typ_name, obd->obd_name);
 217         }
 218
 219         rc = lmv_check_connect(obd);
 220         if (rc != 0)
 221                 GOTO(out_sysfs, rc);
 222
 223         *pexp = exp;
 224
 225         RETURN(rc);
 226
 227 out_sysfs:
 228         if (lmv->lmv_tgts_kobj)
 229                 kobject_put(lmv->lmv_tgts_kobj);
 230
 231         class_disconnect(exp);
 232
 233         return rc;
 234 }
 235
 236 static int lmv_init_ea_size(struct obd_export *exp, __u32 easize,
 237                             __u32 def_easize)
 238 {
 239         struct obd_device *obd = exp->exp_obd;
 240         struct lmv_obd *lmv = &obd->u.lmv;
 241         struct lmv_tgt_desc *tgt;
 242         int change = 0;
 243         int rc = 0;
 244
 245         ENTRY;
 246
 247         if (lmv->max_easize < easize) {
 248                 lmv->max_easize = easize;
 249                 change = 1;
 250         }
 251         if (lmv->max_def_easize < def_easize) {
 252                 lmv->max_def_easize = def_easize;
 253                 change = 1;
 254         }
 255
 256         if (change == 0)
 257                 RETURN(0);
 258
 259         if (lmv->connected == 0)
 260                 RETURN(0);
 261
 262         lmv_foreach_connected_tgt(lmv, tgt) {
 263                 if (!tgt->ltd_active)
 264                         continue;
 265
 266                 rc = md_init_ea_size(tgt->ltd_exp, easize, def_easize);
 267                 if (rc) {
 268                         CERROR("%s: obd_init_ea_size() failed on MDT target %d:"
 269                                " rc = %d\n", obd->obd_name, tgt->ltd_index, rc);
 270                         break;
 271                 }
 272         }
 273         RETURN(rc);
 274 }
 275
 276 #define MAX_STRING_SIZE 128
 277
 278 int lmv_connect_mdc(struct obd_device *obd, struct lmv_tgt_desc *tgt)
 279 {
 280         struct lmv_obd          *lmv = &obd->u.lmv;
 281         struct obd_device       *mdc_obd;
 282         struct obd_export       *mdc_exp;
 283         struct lu_fld_target     target;
 284         int                      rc;
 285         ENTRY;
 286
 287         mdc_obd = class_find_client_obd(&tgt->ltd_uuid, LUSTRE_MDC_NAME,
 288                                         &obd->obd_uuid);
 289         if (!mdc_obd) {
 290                 CERROR("target %s not attached\n", tgt->ltd_uuid.uuid);
 291                 RETURN(-EINVAL);
 292         }
 293
 294         CDEBUG(D_CONFIG, "connect to %s(%s) - %s, %s\n",
 295                mdc_obd->obd_name, mdc_obd->obd_uuid.uuid,
 296                tgt->ltd_uuid.uuid, obd->obd_uuid.uuid);
 297
 298         if (!mdc_obd->obd_set_up) {
 299                 CERROR("target %s is not set up\n", tgt->ltd_uuid.uuid);
 300                 RETURN(-EINVAL);
 301         }
 302
 303         rc = obd_connect(NULL, &mdc_exp, mdc_obd, &obd->obd_uuid,
 304                          &lmv->conn_data, lmv->lmv_cache);
 305         if (rc) {
 306                 CERROR("target %s connect error %d\n", tgt->ltd_uuid.uuid, rc);
 307                 RETURN(rc);
 308         }
 309
 310         /*
 311          * Init fid sequence client for this mdc and add new fld target.
 312          */
 313         rc = obd_fid_init(mdc_obd, mdc_exp, LUSTRE_SEQ_METADATA);
 314         if (rc)
 315                 RETURN(rc);
 316
 317         target.ft_srv = NULL;
 318         target.ft_exp = mdc_exp;
 319         target.ft_idx = tgt->ltd_index;
 320
 321         fld_client_add_target(&lmv->lmv_fld, &target);
 322
 323         rc = obd_register_observer(mdc_obd, obd);
 324         if (rc) {
 325                 obd_disconnect(mdc_exp);
 326                 CERROR("target %s register_observer error %d\n",
 327                        tgt->ltd_uuid.uuid, rc);
 328                 RETURN(rc);
 329         }
 330
 331         if (obd->obd_observer) {
 332                 /*
 333                  * Tell the observer about the new target.
 334                  */
 335                 rc = obd_notify(obd->obd_observer, mdc_exp->exp_obd,
 336                                 OBD_NOTIFY_ACTIVE);
 337                 if (rc) {
 338                         obd_disconnect(mdc_exp);
 339                         RETURN(rc);
 340                 }
 341         }
 342
 343         tgt->ltd_active = 1;
 344         tgt->ltd_exp = mdc_exp;
 345         lmv->lmv_mdt_descs.ltd_lmv_desc.ld_active_tgt_count++;
 346
 347         md_init_ea_size(tgt->ltd_exp, lmv->max_easize, lmv->max_def_easize);
 348
 349         rc = lu_qos_add_tgt(&lmv->lmv_qos, tgt);
 350         if (rc) {
 351                 obd_disconnect(mdc_exp);
 352                 RETURN(rc);
 353         }
 354
 355         CDEBUG(D_CONFIG, "Connected to %s(%s) successfully (%d)\n",
 356                 mdc_obd->obd_name, mdc_obd->obd_uuid.uuid,
 357                 atomic_read(&obd->obd_refcount));
 358
 359         lmv_statfs_check_update(obd, tgt);
 360
 361         if (lmv->lmv_tgts_kobj)
 362                 /* Even if we failed to create the link, that's fine */
 363                 rc = sysfs_create_link(lmv->lmv_tgts_kobj,
 364                                        &mdc_obd->obd_kset.kobj,
 365                                        mdc_obd->obd_name);
 366         RETURN(0);
 367 }
 368
 369 static void lmv_del_target(struct lmv_obd *lmv, struct lu_tgt_desc *tgt)
 370 {
 371         LASSERT(tgt);
 372         ltd_del_tgt(&lmv->lmv_mdt_descs, tgt);
 373         OBD_FREE_PTR(tgt);
 374 }
 375
 376 static int lmv_add_target(struct obd_device *obd, struct obd_uuid *uuidp,
 377                            __u32 index, int gen)
 378 {
 379         struct obd_device *mdc_obd;
 380         struct lmv_obd *lmv = &obd->u.lmv;
 381         struct lmv_tgt_desc *tgt;
 382         struct lu_tgt_descs *ltd = &lmv->lmv_mdt_descs;
 383         int rc = 0;
 384
 385         ENTRY;
 386
 387         CDEBUG(D_CONFIG, "Target uuid: %s. index %d\n", uuidp->uuid, index);
 388         mdc_obd = class_find_client_obd(uuidp, LUSTRE_MDC_NAME,
 389                                         &obd->obd_uuid);
 390         if (!mdc_obd) {
 391                 CERROR("%s: Target %s not attached: rc = %d\n",
 392                        obd->obd_name, uuidp->uuid, -EINVAL);
 393                 RETURN(-EINVAL);
 394         }
 395
 396         OBD_ALLOC_PTR(tgt);
 397         if (!tgt)
 398                 RETURN(-ENOMEM);
 399
 400         mutex_init(&tgt->ltd_fid_mutex);
 401         tgt->ltd_index = index;
 402         tgt->ltd_uuid = *uuidp;
 403         tgt->ltd_active = 0;
 404
 405         mutex_lock(&ltd->ltd_mutex);
 406         rc = ltd_add_tgt(ltd, tgt);
 407         mutex_unlock(&ltd->ltd_mutex);
 408
 409         if (rc)
 410                 GOTO(out_tgt, rc);
 411
 412         if (!lmv->connected)
 413                 /* lmv_check_connect() will connect this target. */
 414                 RETURN(0);
 415
 416         rc = lmv_connect_mdc(obd, tgt);
 417         if (!rc) {
 418                 int easize = sizeof(struct lmv_stripe_md) +
 419                         lmv->lmv_mdt_count * sizeof(struct lu_fid);
 420
 421                 lmv_init_ea_size(obd->obd_self_export, easize, 0);
 422         }
 423
 424         RETURN(rc);
 425
 426 out_tgt:
 427         OBD_FREE_PTR(tgt);
 428         return rc;
 429 }
 430
 431 static int lmv_check_connect(struct obd_device *obd)
 432 {
 433         struct lmv_obd *lmv = &obd->u.lmv;
 434         struct lmv_tgt_desc *tgt;
 435         int easize;
 436         int rc;
 437
 438         ENTRY;
 439
 440         if (lmv->connected)
 441                 RETURN(0);
 442
 443         mutex_lock(&lmv->lmv_mdt_descs.ltd_mutex);
 444         if (lmv->connected)
 445                 GOTO(unlock, rc = 0);
 446
 447         if (!lmv->lmv_mdt_count) {
 448                 CERROR("%s: no targets configured: rc = -EINVAL\n",
 449                        obd->obd_name);
 450                 GOTO(unlock, rc = -EINVAL);
 451         }
 452
 453         if (!lmv_mdt0_inited(lmv)) {
 454                 CERROR("%s: no target configured for index 0: rc = -EINVAL.\n",
 455                        obd->obd_name);
 456                 GOTO(unlock, rc = -EINVAL);
 457         }
 458
 459         CDEBUG(D_CONFIG, "Time to connect %s to %s\n",
 460                obd->obd_uuid.uuid, obd->obd_name);
 461
 462         lmv_foreach_tgt(lmv, tgt) {
 463                 rc = lmv_connect_mdc(obd, tgt);
 464                 if (rc)
 465                         GOTO(out_disc, rc);
 466         }
 467
 468         lmv->connected = 1;
 469         easize = lmv_mds_md_size(lmv->lmv_mdt_count, LMV_MAGIC);
 470         lmv_init_ea_size(obd->obd_self_export, easize, 0);
 471         EXIT;
 472 unlock:
 473         mutex_unlock(&lmv->lmv_mdt_descs.ltd_mutex);
 474
 475         return rc;
 476
 477 out_disc:
 478         lmv_foreach_tgt(lmv, tgt) {
 479                 tgt->ltd_active = 0;
 480                 if (!tgt->ltd_exp)
 481                         continue;
 482
 483                 --lmv->lmv_mdt_descs.ltd_lmv_desc.ld_active_tgt_count;
 484                 obd_disconnect(tgt->ltd_exp);
 485         }
 486
 487         goto unlock;
 488 }
 489
 490 static int lmv_disconnect_mdc(struct obd_device *obd, struct lmv_tgt_desc *tgt)
 491 {
 492         struct lmv_obd         *lmv = &obd->u.lmv;
 493         struct obd_device      *mdc_obd;
 494         int                     rc;
 495         ENTRY;
 496
 497         LASSERT(tgt != NULL);
 498         LASSERT(obd != NULL);
 499
 500         mdc_obd = class_exp2obd(tgt->ltd_exp);
 501
 502         if (mdc_obd) {
 503                 mdc_obd->obd_force = obd->obd_force;
 504                 mdc_obd->obd_fail = obd->obd_fail;
 505                 mdc_obd->obd_no_recov = obd->obd_no_recov;
 506
 507                 if (lmv->lmv_tgts_kobj)
 508                         sysfs_remove_link(lmv->lmv_tgts_kobj,
 509                                           mdc_obd->obd_name);
 510         }
 511
 512         rc = obd_fid_fini(tgt->ltd_exp->exp_obd);
 513         if (rc)
 514                 CERROR("Can't finanize fids factory\n");
 515
 516         CDEBUG(D_INFO, "Disconnected from %s(%s) successfully\n",
 517                tgt->ltd_exp->exp_obd->obd_name,
 518                tgt->ltd_exp->exp_obd->obd_uuid.uuid);
 519
 520         obd_register_observer(tgt->ltd_exp->exp_obd, NULL);
 521         rc = obd_disconnect(tgt->ltd_exp);
 522         if (rc) {
 523                 if (tgt->ltd_active) {
 524                         CERROR("Target %s disconnect error %d\n",
 525                                tgt->ltd_uuid.uuid, rc);
 526                 }
 527         }
 528
 529         lmv_activate_target(lmv, tgt, 0);
 530         tgt->ltd_exp = NULL;
 531         RETURN(0);
 532 }
 533
 534 static int lmv_disconnect(struct obd_export *exp)
 535 {
 536         struct obd_device *obd = class_exp2obd(exp);
 537         struct lmv_obd *lmv = &obd->u.lmv;
 538         struct lmv_tgt_desc *tgt;
 539         int rc;
 540
 541         ENTRY;
 542
 543         lmv_foreach_connected_tgt(lmv, tgt)
 544                 lmv_disconnect_mdc(obd, tgt);
 545
 546         if (lmv->lmv_tgts_kobj)
 547                 kobject_put(lmv->lmv_tgts_kobj);
 548
 549         if (!lmv->connected)
 550                 class_export_put(exp);
 551         rc = class_disconnect(exp);
 552         lmv->connected = 0;
 553
 554         RETURN(rc);
 555 }
 556
 557 static int lmv_fid2path(struct obd_export *exp, int len, void *karg,
 558                         void __user *uarg)
 559 {
 560         struct obd_device *obd = class_exp2obd(exp);
 561         struct lmv_obd *lmv = &obd->u.lmv;
 562         struct getinfo_fid2path *gf;
 563         struct lmv_tgt_desc *tgt;
 564         struct getinfo_fid2path *remote_gf = NULL;
 565         struct lu_fid root_fid;
 566         int remote_gf_size = 0;
 567         int rc;
 568
 569         gf = karg;
 570         tgt = lmv_fid2tgt(lmv, &gf->gf_fid);
 571         if (IS_ERR(tgt))
 572                 RETURN(PTR_ERR(tgt));
 573
 574         root_fid = *gf->gf_u.gf_root_fid;
 575         LASSERT(fid_is_sane(&root_fid));
 576
 577 repeat_fid2path:
 578         rc = obd_iocontrol(OBD_IOC_FID2PATH, tgt->ltd_exp, len, gf, uarg);
 579         if (rc != 0 && rc != -EREMOTE)
 580                 GOTO(out_fid2path, rc);
 581
 582         /* If remote_gf != NULL, it means just building the
 583          * path on the remote MDT, copy this path segement to gf */
 584         if (remote_gf != NULL) {
 585                 struct getinfo_fid2path *ori_gf;
 586                 char *ptr;
 587                 int len;
 588
 589                 ori_gf = (struct getinfo_fid2path *)karg;
 590                 if (strlen(ori_gf->gf_u.gf_path) + 1 +
 591                     strlen(gf->gf_u.gf_path) + 1 > ori_gf->gf_pathlen)
 592                         GOTO(out_fid2path, rc = -EOVERFLOW);
 593
 594                 ptr = ori_gf->gf_u.gf_path;
 595
 596                 len = strlen(gf->gf_u.gf_path);
 597                 /* move the current path to the right to release space
 598                  * for closer-to-root part */
 599                 memmove(ptr + len + 1, ptr, strlen(ori_gf->gf_u.gf_path));
 600                 memcpy(ptr, gf->gf_u.gf_path, len);
 601                 ptr[len] = '/';
 602         }
 603
 604         CDEBUG(D_INFO, "%s: get path %s "DFID" rec: %llu ln: %u\n",
 605                tgt->ltd_exp->exp_obd->obd_name,
 606                gf->gf_u.gf_path, PFID(&gf->gf_fid), gf->gf_recno,
 607                gf->gf_linkno);
 608
 609         if (rc == 0)
 610                 GOTO(out_fid2path, rc);
 611
 612         /* sigh, has to go to another MDT to do path building further */
 613         if (remote_gf == NULL) {
 614                 remote_gf_size = sizeof(*remote_gf) + PATH_MAX;
 615                 OBD_ALLOC(remote_gf, remote_gf_size);
 616                 if (remote_gf == NULL)
 617                         GOTO(out_fid2path, rc = -ENOMEM);
 618                 remote_gf->gf_pathlen = PATH_MAX;
 619         }
 620
 621         if (!fid_is_sane(&gf->gf_fid)) {
 622                 CERROR("%s: invalid FID "DFID": rc = %d\n",
 623                        tgt->ltd_exp->exp_obd->obd_name,
 624                        PFID(&gf->gf_fid), -EINVAL);
 625                 GOTO(out_fid2path, rc = -EINVAL);
 626         }
 627
 628         tgt = lmv_fid2tgt(lmv, &gf->gf_fid);
 629         if (IS_ERR(tgt))
 630                 GOTO(out_fid2path, rc = -EINVAL);
 631
 632         remote_gf->gf_fid = gf->gf_fid;
 633         remote_gf->gf_recno = -1;
 634         remote_gf->gf_linkno = -1;
 635         memset(remote_gf->gf_u.gf_path, 0, remote_gf->gf_pathlen);
 636         *remote_gf->gf_u.gf_root_fid = root_fid;
 637         gf = remote_gf;
 638         goto repeat_fid2path;
 639
 640 out_fid2path:
 641         if (remote_gf != NULL)
 642                 OBD_FREE(remote_gf, remote_gf_size);
 643         RETURN(rc);
 644 }
 645
 646 static int lmv_hsm_req_count(struct lmv_obd *lmv,
 647                              const struct hsm_user_request *hur,
 648                              const struct lmv_tgt_desc *tgt_mds)
 649 {
 650         struct lmv_tgt_desc *curr_tgt;
 651         __u32 i;
 652         int nr = 0;
 653
 654         /* count how many requests must be sent to the given target */
 655         for (i = 0; i < hur->hur_request.hr_itemcount; i++) {
 656                 curr_tgt = lmv_fid2tgt(lmv, &hur->hur_user_item[i].hui_fid);
 657                 if (IS_ERR(curr_tgt))
 658                         RETURN(PTR_ERR(curr_tgt));
 659                 if (obd_uuid_equals(&curr_tgt->ltd_uuid, &tgt_mds->ltd_uuid))
 660                         nr++;
 661         }
 662         return nr;
 663 }
 664
 665 static int lmv_hsm_req_build(struct lmv_obd *lmv,
 666                               struct hsm_user_request *hur_in,
 667                               const struct lmv_tgt_desc *tgt_mds,
 668                               struct hsm_user_request *hur_out)
 669 {
 670         __u32 i, nr_out;
 671         struct lmv_tgt_desc *curr_tgt;
 672
 673         /* build the hsm_user_request for the given target */
 674         hur_out->hur_request = hur_in->hur_request;
 675         nr_out = 0;
 676         for (i = 0; i < hur_in->hur_request.hr_itemcount; i++) {
 677                 curr_tgt = lmv_fid2tgt(lmv, &hur_in->hur_user_item[i].hui_fid);
 678                 if (IS_ERR(curr_tgt))
 679                         RETURN(PTR_ERR(curr_tgt));
 680                 if (obd_uuid_equals(&curr_tgt->ltd_uuid, &tgt_mds->ltd_uuid)) {
 681                         hur_out->hur_user_item[nr_out] =
 682                                                 hur_in->hur_user_item[i];
 683                         nr_out++;
 684                 }
 685         }
 686         hur_out->hur_request.hr_itemcount = nr_out;
 687         memcpy(hur_data(hur_out), hur_data(hur_in),
 688                hur_in->hur_request.hr_data_len);
 689
 690         RETURN(0);
 691 }
 692
 693 static int lmv_hsm_ct_unregister(struct obd_device *obd, unsigned int cmd,
 694                                  int len, struct lustre_kernelcomm *lk,
 695                                  void __user *uarg)
 696 {
 697         struct lmv_obd *lmv = &obd->u.lmv;
 698         struct lu_tgt_desc *tgt;
 699         int rc;
 700
 701         ENTRY;
 702
 703         /* unregister request (call from llapi_hsm_copytool_fini) */
 704         lmv_foreach_connected_tgt(lmv, tgt)
 705                 /* best effort: try to clean as much as possible
 706                  * (continue on error) */
 707                 obd_iocontrol(cmd, tgt->ltd_exp, len, lk, uarg);
 708
 709         /* Whatever the result, remove copytool from kuc groups.
 710          * Unreached coordinators will get EPIPE on next requests
 711          * and will unregister automatically.
 712          */
 713         rc = libcfs_kkuc_group_rem(&obd->obd_uuid, lk->lk_uid, lk->lk_group);
 714
 715         RETURN(rc);
 716 }
 717
 718 static int lmv_hsm_ct_register(struct obd_device *obd, unsigned int cmd,
 719                                int len, struct lustre_kernelcomm *lk,
 720                                void __user *uarg)
 721 {
 722         struct lmv_obd *lmv = &obd->u.lmv;
 723         struct file *filp;
 724         bool any_set = false;
 725         struct kkuc_ct_data *kcd;
 726         size_t kcd_size;
 727         struct lu_tgt_desc *tgt;
 728         __u32 i;
 729         int err;
 730         int rc = 0;
 731
 732         ENTRY;
 733
 734         filp = fget(lk->lk_wfd);
 735         if (!filp)
 736                 RETURN(-EBADF);
 737
 738         if (lk->lk_flags & LK_FLG_DATANR)
 739                 kcd_size = offsetof(struct kkuc_ct_data,
 740                                     kcd_archives[lk->lk_data_count]);
 741         else
 742                 kcd_size = sizeof(*kcd);
 743
 744         OBD_ALLOC(kcd, kcd_size);
 745         if (kcd == NULL)
 746                 GOTO(err_fput, rc = -ENOMEM);
 747
 748         kcd->kcd_nr_archives = lk->lk_data_count;
 749         if (lk->lk_flags & LK_FLG_DATANR) {
 750                 kcd->kcd_magic = KKUC_CT_DATA_ARRAY_MAGIC;
 751                 if (lk->lk_data_count > 0)
 752                         memcpy(kcd->kcd_archives, lk->lk_data,
 753                                sizeof(*kcd->kcd_archives) * lk->lk_data_count);
 754         } else {
 755                 kcd->kcd_magic = KKUC_CT_DATA_BITMAP_MAGIC;
 756         }
 757
 758         rc = libcfs_kkuc_group_add(filp, &obd->obd_uuid, lk->lk_uid,
 759                                    lk->lk_group, kcd, kcd_size);
 760         OBD_FREE(kcd, kcd_size);
 761         if (rc)
 762                 GOTO(err_fput, rc);
 763
 764         /* All or nothing: try to register to all MDS.
 765          * In case of failure, unregister from previous MDS,
 766          * except if it because of inactive target. */
 767         lmv_foreach_connected_tgt(lmv, tgt) {
 768                 err = obd_iocontrol(cmd, tgt->ltd_exp, len, lk, uarg);
 769                 if (err) {
 770                         if (tgt->ltd_active) {
 771                                 /* permanent error */
 772                                 CERROR("%s: iocontrol MDC %s on MDT"
 773                                        " idx %d cmd %x: err = %d\n",
 774                                        lmv2obd_dev(lmv)->obd_name,
 775                                        tgt->ltd_uuid.uuid, tgt->ltd_index, cmd,
 776                                        err);
 777                                 rc = err;
 778                                 lk->lk_flags |= LK_FLG_STOP;
 779                                 i = tgt->ltd_index;
 780                                 /* unregister from previous MDS */
 781                                 lmv_foreach_connected_tgt(lmv, tgt) {
 782                                         if (tgt->ltd_index >= i)
 783                                                 break;
 784
 785                                         obd_iocontrol(cmd, tgt->ltd_exp, len,
 786                                                       lk, uarg);
 787                                 }
 788                                 GOTO(err_kkuc_rem, rc);
 789                         }
 790                         /* else: transient error.
 791                          * kuc will register to the missing MDT
 792                          * when it is back */
 793                 } else {
 794                         any_set = true;
 795                 }
 796         }
 797
 798         if (!any_set)
 799                 /* no registration done: return error */
 800                 GOTO(err_kkuc_rem, rc = -ENOTCONN);
 801
 802         RETURN(0);
 803
 804 err_kkuc_rem:
 805         libcfs_kkuc_group_rem(&obd->obd_uuid, lk->lk_uid, lk->lk_group);
 806
 807 err_fput:
 808         fput(filp);
 809         return rc;
 810 }
 811
 812 static int lmv_iocontrol(unsigned int cmd, struct obd_export *exp,
 813                          int len, void *karg, void __user *uarg)
 814 {
 815         struct obd_device *obd = class_exp2obd(exp);
 816         struct lmv_obd *lmv = &obd->u.lmv;
 817         struct lu_tgt_desc *tgt = NULL;
 818         int set = 0;
 819         __u32 count = lmv->lmv_mdt_count;
 820         int rc = 0;
 821
 822         ENTRY;
 823
 824         if (count == 0)
 825                 RETURN(-ENOTTY);
 826
 827         switch (cmd) {
 828         case IOC_OBD_STATFS: {
 829                 struct obd_ioctl_data *data = karg;
 830                 struct obd_device *mdc_obd;
 831                 struct obd_statfs stat_buf = {0};
 832                 __u32 index;
 833
 834                 memcpy(&index, data->ioc_inlbuf2, sizeof(__u32));
 835
 836                 if (index >= lmv->lmv_mdt_descs.ltd_tgts_size)
 837                         RETURN(-ENODEV);
 838
 839                 tgt = lmv_tgt(lmv, index);
 840                 if (!tgt)
 841                         RETURN(-EAGAIN);
 842
 843                 if (!tgt->ltd_active)
 844                         RETURN(-ENODATA);
 845
 846                 mdc_obd = class_exp2obd(tgt->ltd_exp);
 847                 if (!mdc_obd)
 848                         RETURN(-EINVAL);
 849
 850                 /* copy UUID */
 851                 if (copy_to_user(data->ioc_pbuf2, obd2cli_tgt(mdc_obd),
 852                                  min((int) data->ioc_plen2,
 853                                      (int) sizeof(struct obd_uuid))))
 854                         RETURN(-EFAULT);
 855
 856                 rc = obd_statfs(NULL, tgt->ltd_exp, &stat_buf,
 857                                 ktime_get_seconds() - OBD_STATFS_CACHE_SECONDS,
 858                                 0);
 859                 if (rc)
 860                         RETURN(rc);
 861                 if (copy_to_user(data->ioc_pbuf1, &stat_buf,
 862                                  min((int) data->ioc_plen1,
 863                                      (int) sizeof(stat_buf))))
 864                         RETURN(-EFAULT);
 865                 break;
 866         }
 867         case OBD_IOC_QUOTACTL: {
 868                 struct if_quotactl *qctl = karg;
 869                 struct obd_quotactl *oqctl;
 870
 871                 if (qctl->qc_valid == QC_MDTIDX) {
 872                         tgt = lmv_tgt(lmv, qctl->qc_idx);
 873                 } else if (qctl->qc_valid == QC_UUID) {
 874                         lmv_foreach_tgt(lmv, tgt) {
 875                                 if (!obd_uuid_equals(&tgt->ltd_uuid,
 876                                                      &qctl->obd_uuid))
 877                                         continue;
 878
 879                                 if (!tgt->ltd_exp)
 880                                         RETURN(-EINVAL);
 881
 882                                 break;
 883                         }
 884                 } else {
 885                         RETURN(-EINVAL);
 886                 }
 887
 888                 if (!tgt || !tgt->ltd_exp)
 889                         RETURN(-EINVAL);
 890
 891                 OBD_ALLOC_PTR(oqctl);
 892                 if (!oqctl)
 893                         RETURN(-ENOMEM);
 894
 895                 QCTL_COPY(oqctl, qctl);
 896                 rc = obd_quotactl(tgt->ltd_exp, oqctl);
 897                 if (rc == 0) {
 898                         QCTL_COPY(qctl, oqctl);
 899                         qctl->qc_valid = QC_MDTIDX;
 900                         qctl->obd_uuid = tgt->ltd_uuid;
 901                 }
 902                 OBD_FREE_PTR(oqctl);
 903                 break;
 904         }
 905         case LL_IOC_GET_CONNECT_FLAGS: {
 906                 tgt = lmv_tgt(lmv, 0);
 907                 rc = -ENODATA;
 908                 if (tgt && tgt->ltd_exp)
 909                         rc = obd_iocontrol(cmd, tgt->ltd_exp, len, karg, uarg);
 910                 break;
 911         }
 912         case LL_IOC_FID2MDTIDX: {
 913                 struct lu_fid *fid = karg;
 914                 int             mdt_index;
 915
 916                 rc = lmv_fld_lookup(lmv, fid, &mdt_index);
 917                 if (rc != 0)
 918                         RETURN(rc);
 919
 920                 /* Note: this is from llite(see ll_dir_ioctl()), @uarg does not
 921                  * point to user space memory for FID2MDTIDX. */
 922                 *(__u32 *)uarg = mdt_index;
 923                 break;
 924         }
 925         case OBD_IOC_FID2PATH: {
 926                 rc = lmv_fid2path(exp, len, karg, uarg);
 927                 break;
 928         }
 929         case LL_IOC_HSM_STATE_GET:
 930         case LL_IOC_HSM_STATE_SET:
 931         case LL_IOC_HSM_ACTION: {
 932                 struct md_op_data *op_data = karg;
 933
 934                 tgt = lmv_fid2tgt(lmv, &op_data->op_fid1);
 935                 if (IS_ERR(tgt))
 936                         RETURN(PTR_ERR(tgt));
 937
 938                 if (tgt->ltd_exp == NULL)
 939                         RETURN(-EINVAL);
 940
 941                 rc = obd_iocontrol(cmd, tgt->ltd_exp, len, karg, uarg);
 942                 break;
 943         }
 944         case LL_IOC_HSM_PROGRESS: {
 945                 const struct hsm_progress_kernel *hpk = karg;
 946
 947                 tgt = lmv_fid2tgt(lmv, &hpk->hpk_fid);
 948                 if (IS_ERR(tgt))
 949                         RETURN(PTR_ERR(tgt));
 950                 rc = obd_iocontrol(cmd, tgt->ltd_exp, len, karg, uarg);
 951                 break;
 952         }
 953         case LL_IOC_HSM_REQUEST: {
 954                 struct hsm_user_request *hur = karg;
 955                 unsigned int reqcount = hur->hur_request.hr_itemcount;
 956
 957                 if (reqcount == 0)
 958                         RETURN(0);
 959
 960                 /* if the request is about a single fid
 961                  * or if there is a single MDS, no need to split
 962                  * the request. */
 963                 if (reqcount == 1 || count == 1) {
 964                         tgt = lmv_fid2tgt(lmv, &hur->hur_user_item[0].hui_fid);
 965                         if (IS_ERR(tgt))
 966                                 RETURN(PTR_ERR(tgt));
 967                         rc = obd_iocontrol(cmd, tgt->ltd_exp, len, karg, uarg);
 968                 } else {
 969                         /* split fid list to their respective MDS */
 970                         lmv_foreach_connected_tgt(lmv, tgt) {
 971                                 int nr, rc1;
 972                                 size_t reqlen;
 973                                 struct hsm_user_request *req;
 974
 975                                 nr = lmv_hsm_req_count(lmv, hur, tgt);
 976                                 if (nr < 0)
 977                                         RETURN(nr);
 978                                 if (nr == 0) /* nothing for this MDS */
 979                                         continue;
 980
 981                                 /* build a request with fids for this MDS */
 982                                 reqlen = offsetof(typeof(*hur),
 983                                                   hur_user_item[nr])
 984                                                 + hur->hur_request.hr_data_len;
 985                                 OBD_ALLOC_LARGE(req, reqlen);
 986                                 if (req == NULL)
 987                                         RETURN(-ENOMEM);
 988                                 rc1 = lmv_hsm_req_build(lmv, hur, tgt, req);
 989                                 if (rc1 < 0)
 990                                         GOTO(hsm_req_err, rc1);
 991                                 rc1 = obd_iocontrol(cmd, tgt->ltd_exp, reqlen,
 992                                                     req, uarg);
 993 hsm_req_err:
 994                                 if (rc1 != 0 && rc == 0)
 995                                         rc = rc1;
 996                                 OBD_FREE_LARGE(req, reqlen);
 997                         }
 998                 }
 999                 break;
1000         }
1001         case LL_IOC_LOV_SWAP_LAYOUTS: {
1002                 struct md_op_data *op_data = karg;
1003                 struct lmv_tgt_desc *tgt1, *tgt2;
1004
1005                 tgt1 = lmv_fid2tgt(lmv, &op_data->op_fid1);
1006                 if (IS_ERR(tgt1))
1007                         RETURN(PTR_ERR(tgt1));
1008
1009                 tgt2 = lmv_fid2tgt(lmv, &op_data->op_fid2);
1010                 if (IS_ERR(tgt2))
1011                         RETURN(PTR_ERR(tgt2));
1012
1013                 if ((tgt1->ltd_exp == NULL) || (tgt2->ltd_exp == NULL))
1014                         RETURN(-EINVAL);
1015
1016                 /* only files on same MDT can have their layouts swapped */
1017                 if (tgt1->ltd_index != tgt2->ltd_index)
1018                         RETURN(-EPERM);
1019
1020                 rc = obd_iocontrol(cmd, tgt1->ltd_exp, len, karg, uarg);
1021                 break;
1022         }
1023         case LL_IOC_HSM_CT_START: {
1024                 struct lustre_kernelcomm *lk = karg;
1025                 if (lk->lk_flags & LK_FLG_STOP)
1026                         rc = lmv_hsm_ct_unregister(obd, cmd, len, lk, uarg);
1027                 else
1028                         rc = lmv_hsm_ct_register(obd, cmd, len, lk, uarg);
1029                 break;
1030         }
1031         default:
1032                 lmv_foreach_connected_tgt(lmv, tgt) {
1033                         struct obd_device *mdc_obd;
1034                         int err;
1035
1036                         /* ll_umount_begin() sets force flag but for lmv, not
1037                          * mdc. Let's pass it through */
1038                         mdc_obd = class_exp2obd(tgt->ltd_exp);
1039                         mdc_obd->obd_force = obd->obd_force;
1040                         err = obd_iocontrol(cmd, tgt->ltd_exp, len, karg, uarg);
1041                         if (err) {
1042                                 if (tgt->ltd_active) {
1043                                         CERROR("error: iocontrol MDC %s on MDT"
1044                                                " idx %d cmd %x: err = %d\n",
1045                                                tgt->ltd_uuid.uuid,
1046                                                tgt->ltd_index, cmd, err);
1047                                         if (!rc)
1048                                                 rc = err;
1049                                 }
1050                         } else
1051                                 set = 1;
1052                 }
1053                 if (!set && !rc)
1054                         rc = -EIO;
1055         }
1056         RETURN(rc);
1057 }
1058
1059 int lmv_fid_alloc(const struct lu_env *env, struct obd_export *exp,
1060                   struct lu_fid *fid, struct md_op_data *op_data)
1061 {
1062         struct obd_device *obd = class_exp2obd(exp);
1063         struct lmv_obd *lmv = &obd->u.lmv;
1064         struct lmv_tgt_desc *tgt;
1065         int rc;
1066
1067         ENTRY;
1068
1069         LASSERT(op_data);
1070         LASSERT(fid);
1071
1072         tgt = lmv_tgt(lmv, op_data->op_mds);
1073         if (!tgt)
1074                 RETURN(-ENODEV);
1075
1076         if (!tgt->ltd_active || !tgt->ltd_exp)
1077                 RETURN(-ENODEV);
1078
1079         /*
1080          * New seq alloc and FLD setup should be atomic. Otherwise we may find
1081          * on server that seq in new allocated fid is not yet known.
1082          */
1083         mutex_lock(&tgt->ltd_fid_mutex);
1084         rc = obd_fid_alloc(NULL, tgt->ltd_exp, fid, NULL);
1085         mutex_unlock(&tgt->ltd_fid_mutex);
1086         if (rc > 0) {
1087                 LASSERT(fid_is_sane(fid));
1088                 rc = 0;
1089         }
1090
1091         RETURN(rc);
1092 }
1093
1094 static int lmv_setup(struct obd_device *obd, struct lustre_cfg *lcfg)
1095 {
1096         struct lmv_obd *lmv = &obd->u.lmv;
1097         struct lmv_desc *desc;
1098         struct lnet_process_id lnet_id;
1099         int i = 0;
1100         int rc;
1101
1102         ENTRY;
1103
1104         if (LUSTRE_CFG_BUFLEN(lcfg, 1) < 1) {
1105                 CERROR("LMV setup requires a descriptor\n");
1106                 RETURN(-EINVAL);
1107         }
1108
1109         desc = (struct lmv_desc *)lustre_cfg_buf(lcfg, 1);
1110         if (sizeof(*desc) > LUSTRE_CFG_BUFLEN(lcfg, 1)) {
1111                 CERROR("Lmv descriptor size wrong: %d > %d\n",
1112                        (int)sizeof(*desc), LUSTRE_CFG_BUFLEN(lcfg, 1));
1113                 RETURN(-EINVAL);
1114         }
1115
1116         obd_str2uuid(&lmv->lmv_mdt_descs.ltd_lmv_desc.ld_uuid,
1117                      desc->ld_uuid.uuid);
1118         lmv->lmv_mdt_descs.ltd_lmv_desc.ld_tgt_count = 0;
1119         lmv->lmv_mdt_descs.ltd_lmv_desc.ld_active_tgt_count = 0;
1120         lmv->lmv_mdt_descs.ltd_lmv_desc.ld_qos_maxage =
1121                 LMV_DESC_QOS_MAXAGE_DEFAULT;
1122         lmv->max_def_easize = 0;
1123         lmv->max_easize = 0;
1124
1125         spin_lock_init(&lmv->lmv_lock);
1126
1127         /*
1128          * initialize rr_index to lower 32bit of netid, so that client
1129          * can distribute subdirs evenly from the beginning.
1130          */
1131         while (LNetGetId(i++, &lnet_id) != -ENOENT) {
1132                 if (lnet_id.nid != LNET_NID_LO_0) {
1133                         lmv->lmv_qos_rr_index = (u32)lnet_id.nid;
1134                         break;
1135                 }
1136         }
1137
1138         rc = lmv_tunables_init(obd);
1139         if (rc)
1140                 CWARN("%s: error adding LMV sysfs/debugfs files: rc = %d\n",
1141                       obd->obd_name, rc);
1142
1143         rc = fld_client_init(&lmv->lmv_fld, obd->obd_name,
1144                              LUSTRE_CLI_FLD_HASH_DHT);
1145         if (rc)
1146                 CERROR("Can't init FLD, err %d\n", rc);
1147
1148         rc = lu_tgt_descs_init(&lmv->lmv_mdt_descs, true);
1149         if (rc)
1150                 CWARN("%s: error initialize target table: rc = %d\n",
1151                       obd->obd_name, rc);
1152
1153         RETURN(rc);
1154 }
1155
1156 static int lmv_cleanup(struct obd_device *obd)
1157 {
1158         struct lmv_obd *lmv = &obd->u.lmv;
1159         struct lu_tgt_desc *tgt;
1160         struct lu_tgt_desc *tmp;
1161
1162         ENTRY;
1163
1164         fld_client_fini(&lmv->lmv_fld);
1165         lmv_foreach_tgt_safe(lmv, tgt, tmp)
1166                 lmv_del_target(lmv, tgt);
1167         lu_tgt_descs_fini(&lmv->lmv_mdt_descs);
1168
1169         RETURN(0);
1170 }
1171
1172 static int lmv_process_config(struct obd_device *obd, size_t len, void *buf)
1173 {
1174         struct lustre_cfg       *lcfg = buf;
1175         struct obd_uuid         obd_uuid;
1176         int                     gen;
1177         __u32                   index;
1178         int                     rc;
1179         ENTRY;
1180
1181         switch (lcfg->lcfg_command) {
1182         case LCFG_ADD_MDC:
1183                 /* modify_mdc_tgts add 0:lustre-clilmv  1:lustre-MDT0000_UUID
1184                  * 2:0  3:1  4:lustre-MDT0000-mdc_UUID */
1185                 if (LUSTRE_CFG_BUFLEN(lcfg, 1) > sizeof(obd_uuid.uuid))
1186                         GOTO(out, rc = -EINVAL);
1187
1188                 obd_str2uuid(&obd_uuid,  lustre_cfg_buf(lcfg, 1));
1189
1190                 if (sscanf(lustre_cfg_buf(lcfg, 2), "%u", &index) != 1)
1191                         GOTO(out, rc = -EINVAL);
1192                 if (sscanf(lustre_cfg_buf(lcfg, 3), "%d", &gen) != 1)
1193                         GOTO(out, rc = -EINVAL);
1194                 rc = lmv_add_target(obd, &obd_uuid, index, gen);
1195                 GOTO(out, rc);
1196         default:
1197                 CERROR("Unknown command: %d\n", lcfg->lcfg_command);
1198                 GOTO(out, rc = -EINVAL);
1199         }
1200 out:
1201         RETURN(rc);
1202 }
1203
1204 static int lmv_select_statfs_mdt(struct lmv_obd *lmv, __u32 flags)
1205 {
1206         int i;
1207
1208         if (flags & OBD_STATFS_FOR_MDT0)
1209                 return 0;
1210
1211         if (lmv->lmv_statfs_start || lmv->lmv_mdt_count == 1)
1212                 return lmv->lmv_statfs_start;
1213
1214         /* choose initial MDT for this client */
1215         for (i = 0;; i++) {
1216                 struct lnet_process_id lnet_id;
1217                 if (LNetGetId(i, &lnet_id) == -ENOENT)
1218                         break;
1219
1220                 if (lnet_id.nid != LNET_NID_LO_0) {
1221                         /* We dont need a full 64-bit modulus, just enough
1222                          * to distribute the requests across MDTs evenly.
1223                          */
1224                         lmv->lmv_statfs_start = (u32)lnet_id.nid %
1225                                                 lmv->lmv_mdt_count;
1226                         break;
1227                 }
1228         }
1229
1230         return lmv->lmv_statfs_start;
1231 }
1232
1233 static int lmv_statfs(const struct lu_env *env, struct obd_export *exp,
1234                       struct obd_statfs *osfs, time64_t max_age, __u32 flags)
1235 {
1236         struct obd_device *obd = class_exp2obd(exp);
1237         struct lmv_obd *lmv = &obd->u.lmv;
1238         struct obd_statfs *temp;
1239         struct lu_tgt_desc *tgt;
1240         __u32 i;
1241         __u32 idx;
1242         int rc = 0;
1243
1244         ENTRY;
1245
1246         OBD_ALLOC(temp, sizeof(*temp));
1247         if (temp == NULL)
1248                 RETURN(-ENOMEM);
1249
1250         /* distribute statfs among MDTs */
1251         idx = lmv_select_statfs_mdt(lmv, flags);
1252
1253         for (i = 0; i < lmv->lmv_mdt_descs.ltd_tgts_size; i++, idx++) {
1254                 idx = idx % lmv->lmv_mdt_descs.ltd_tgts_size;
1255                 tgt = lmv_tgt(lmv, idx);
1256                 if (!tgt || !tgt->ltd_exp)
1257                         continue;
1258
1259                 rc = obd_statfs(env, tgt->ltd_exp, temp, max_age,
1260                                 flags | OBD_STATFS_NESTED);
1261                 if (rc) {
1262                         CERROR("%s: can't stat MDS #%d: rc = %d\n",
1263                                tgt->ltd_exp->exp_obd->obd_name, i, rc);
1264                         GOTO(out_free_temp, rc);
1265                 }
1266
1267                 if (temp->os_state & OS_STATFS_SUM ||
1268                     flags == OBD_STATFS_FOR_MDT0) {
1269                         /* reset to the last aggregated values
1270                          * and don't sum with non-aggrated data */
1271                         /* If the statfs is from mount, it needs to retrieve
1272                          * necessary information from MDT0. i.e. mount does
1273                          * not need the merged osfs from all of MDT. Also
1274                          * clients can be mounted as long as MDT0 is in
1275                          * service */
1276                         *osfs = *temp;
1277                         break;
1278                 }
1279
1280                 if (i == 0) {
1281                         *osfs = *temp;
1282                 } else {
1283                         osfs->os_bavail += temp->os_bavail;
1284                         osfs->os_blocks += temp->os_blocks;
1285                         osfs->os_ffree += temp->os_ffree;
1286                         osfs->os_files += temp->os_files;
1287                         osfs->os_granted += temp->os_granted;
1288                 }
1289         }
1290
1291         EXIT;
1292 out_free_temp:
1293         OBD_FREE(temp, sizeof(*temp));
1294         return rc;
1295 }
1296
1297 static int lmv_statfs_update(void *cookie, int rc)
1298 {
1299         struct obd_info *oinfo = cookie;
1300         struct obd_device *obd = oinfo->oi_obd;
1301         struct lmv_obd *lmv = &obd->u.lmv;
1302         struct lmv_tgt_desc *tgt = oinfo->oi_tgt;
1303         struct obd_statfs *osfs = oinfo->oi_osfs;
1304
1305         /*
1306          * NB: don't deactivate TGT upon error, because we may not trigger async
1307          * statfs any longer, then there is no chance to activate TGT.
1308          */
1309         if (!rc) {
1310                 spin_lock(&lmv->lmv_lock);
1311                 tgt->ltd_statfs = *osfs;
1312                 tgt->ltd_statfs_age = ktime_get_seconds();
1313                 spin_unlock(&lmv->lmv_lock);
1314                 lmv->lmv_qos.lq_dirty = 1;
1315         }
1316
1317         return rc;
1318 }
1319
1320 /* update tgt statfs async if it's ld_qos_maxage old */
1321 int lmv_statfs_check_update(struct obd_device *obd, struct lmv_tgt_desc *tgt)
1322 {
1323         struct obd_info oinfo = {
1324                 .oi_obd = obd,
1325                 .oi_tgt = tgt,
1326                 .oi_cb_up = lmv_statfs_update,
1327         };
1328         int rc;
1329
1330         if (ktime_get_seconds() - tgt->ltd_statfs_age <
1331             obd->u.lmv.lmv_mdt_descs.ltd_lmv_desc.ld_qos_maxage)
1332                 return 0;
1333
1334         rc = obd_statfs_async(tgt->ltd_exp, &oinfo, 0, NULL);
1335
1336         return rc;
1337 }
1338
1339 static int lmv_get_root(struct obd_export *exp, const char *fileset,
1340                         struct lu_fid *fid)
1341 {
1342         struct obd_device *obd = exp->exp_obd;
1343         struct lmv_obd *lmv = &obd->u.lmv;
1344         struct lu_tgt_desc *tgt = lmv_tgt(lmv, 0);
1345         int rc;
1346
1347         ENTRY;
1348
1349         if (!tgt)
1350                 RETURN(-ENODEV);
1351
1352         rc = md_get_root(tgt->ltd_exp, fileset, fid);
1353         RETURN(rc);
1354 }
1355
1356 static int lmv_getxattr(struct obd_export *exp, const struct lu_fid *fid,
1357                         u64 obd_md_valid, const char *name, size_t buf_size,
1358                         struct ptlrpc_request **req)
1359 {
1360         struct obd_device *obd = exp->exp_obd;
1361         struct lmv_obd *lmv = &obd->u.lmv;
1362         struct lmv_tgt_desc *tgt;
1363         int rc;
1364
1365         ENTRY;
1366
1367         tgt = lmv_fid2tgt(lmv, fid);
1368         if (IS_ERR(tgt))
1369                 RETURN(PTR_ERR(tgt));
1370
1371         rc = md_getxattr(tgt->ltd_exp, fid, obd_md_valid, name, buf_size, req);
1372
1373         RETURN(rc);
1374 }
1375
1376 static int lmv_setxattr(struct obd_export *exp, const struct lu_fid *fid,
1377                         u64 obd_md_valid, const char *name,
1378                         const void *value, size_t value_size,
1379                         unsigned int xattr_flags, u32 suppgid,
1380                         struct ptlrpc_request **req)
1381 {
1382         struct obd_device *obd = exp->exp_obd;
1383         struct lmv_obd *lmv = &obd->u.lmv;
1384         struct lmv_tgt_desc *tgt;
1385         int rc;
1386
1387         ENTRY;
1388
1389         tgt = lmv_fid2tgt(lmv, fid);
1390         if (IS_ERR(tgt))
1391                 RETURN(PTR_ERR(tgt));
1392
1393         rc = md_setxattr(tgt->ltd_exp, fid, obd_md_valid, name,
1394                          value, value_size, xattr_flags, suppgid, req);
1395
1396         RETURN(rc);
1397 }
1398
1399 static int lmv_getattr(struct obd_export *exp, struct md_op_data *op_data,
1400                        struct ptlrpc_request **request)
1401 {
1402         struct obd_device *obd = exp->exp_obd;
1403         struct lmv_obd *lmv = &obd->u.lmv;
1404         struct lmv_tgt_desc *tgt;
1405         int rc;
1406
1407         ENTRY;
1408
1409         tgt = lmv_fid2tgt(lmv, &op_data->op_fid1);
1410         if (IS_ERR(tgt))
1411                 RETURN(PTR_ERR(tgt));
1412
1413         if (op_data->op_flags & MF_GET_MDT_IDX) {
1414                 op_data->op_mds = tgt->ltd_index;
1415                 RETURN(0);
1416         }
1417
1418         rc = md_getattr(tgt->ltd_exp, op_data, request);
1419
1420         RETURN(rc);
1421 }
1422
1423 static int lmv_null_inode(struct obd_export *exp, const struct lu_fid *fid)
1424 {
1425         struct obd_device *obd = exp->exp_obd;
1426         struct lmv_obd *lmv = &obd->u.lmv;
1427         struct lu_tgt_desc *tgt;
1428
1429         ENTRY;
1430
1431         CDEBUG(D_INODE, "CBDATA for "DFID"\n", PFID(fid));
1432
1433         /*
1434          * With DNE every object can have two locks in different namespaces:
1435          * lookup lock in space of MDT storing direntry and update/open lock in
1436          * space of MDT storing inode.
1437          */
1438         lmv_foreach_connected_tgt(lmv, tgt)
1439                 md_null_inode(tgt->ltd_exp, fid);
1440
1441         RETURN(0);
1442 }
1443
1444 static int lmv_close(struct obd_export *exp, struct md_op_data *op_data,
1445                      struct md_open_data *mod, struct ptlrpc_request **request)
1446 {
1447         struct obd_device *obd = exp->exp_obd;
1448         struct lmv_obd *lmv = &obd->u.lmv;
1449         struct lmv_tgt_desc *tgt;
1450         int rc;
1451
1452         ENTRY;
1453
1454         tgt = lmv_fid2tgt(lmv, &op_data->op_fid1);
1455         if (IS_ERR(tgt))
1456                 RETURN(PTR_ERR(tgt));
1457
1458         CDEBUG(D_INODE, "CLOSE "DFID"\n", PFID(&op_data->op_fid1));
1459         rc = md_close(tgt->ltd_exp, op_data, mod, request);
1460         RETURN(rc);
1461 }
1462
1463 static struct lu_tgt_desc *lmv_locate_tgt_qos(struct lmv_obd *lmv, __u32 *mdt)
1464 {
1465         struct lu_tgt_desc *tgt;
1466         __u64 total_weight = 0;
1467         __u64 cur_weight = 0;
1468         __u64 rand;
1469         int rc;
1470
1471         ENTRY;
1472
1473         if (!ltd_qos_is_usable(&lmv->lmv_mdt_descs))
1474                 RETURN(ERR_PTR(-EAGAIN));
1475
1476         down_write(&lmv->lmv_qos.lq_rw_sem);
1477
1478         if (!ltd_qos_is_usable(&lmv->lmv_mdt_descs))
1479                 GOTO(unlock, tgt = ERR_PTR(-EAGAIN));
1480
1481         rc = ltd_qos_penalties_calc(&lmv->lmv_mdt_descs);
1482         if (rc)
1483                 GOTO(unlock, tgt = ERR_PTR(rc));
1484
1485         lmv_foreach_tgt(lmv, tgt) {
1486                 tgt->ltd_qos.ltq_usable = 0;
1487                 if (!tgt->ltd_exp || !tgt->ltd_active)
1488                         continue;
1489
1490                 tgt->ltd_qos.ltq_usable = 1;
1491                 lu_tgt_qos_weight_calc(tgt);
1492                 total_weight += tgt->ltd_qos.ltq_weight;
1493         }
1494
1495         rand = lu_prandom_u64_max(total_weight);
1496
1497         lmv_foreach_connected_tgt(lmv, tgt) {
1498                 if (!tgt->ltd_qos.ltq_usable)
1499                         continue;
1500
1501                 cur_weight += tgt->ltd_qos.ltq_weight;
1502                 if (cur_weight < rand)
1503                         continue;
1504
1505                 *mdt = tgt->ltd_index;
1506                 ltd_qos_update(&lmv->lmv_mdt_descs, tgt, &total_weight);
1507                 GOTO(unlock, rc = 0);
1508         }
1509
1510         /* no proper target found */
1511         GOTO(unlock, tgt = ERR_PTR(-EAGAIN));
1512 unlock:
1513         up_write(&lmv->lmv_qos.lq_rw_sem);
1514
1515         return tgt;
1516 }
1517
1518 static struct lu_tgt_desc *lmv_locate_tgt_rr(struct lmv_obd *lmv, __u32 *mdt)
1519 {
1520         struct lu_tgt_desc *tgt;
1521         int i;
1522         int index;
1523
1524         ENTRY;
1525
1526         spin_lock(&lmv->lmv_qos.lq_rr.lqr_alloc);
1527         for (i = 0; i < lmv->lmv_mdt_descs.ltd_tgts_size; i++) {
1528                 index = (i + lmv->lmv_qos_rr_index) %
1529                         lmv->lmv_mdt_descs.ltd_tgts_size;
1530                 tgt = lmv_tgt(lmv, index);
1531                 if (!tgt || !tgt->ltd_exp || !tgt->ltd_active)
1532                         continue;
1533
1534                 *mdt = tgt->ltd_index;
1535                 lmv->lmv_qos_rr_index = (*mdt + 1) %
1536                                         lmv->lmv_mdt_descs.ltd_tgts_size;
1537                 spin_unlock(&lmv->lmv_qos.lq_rr.lqr_alloc);
1538
1539                 RETURN(tgt);
1540         }
1541         spin_unlock(&lmv->lmv_qos.lq_rr.lqr_alloc);
1542
1543         RETURN(ERR_PTR(-ENODEV));
1544 }
1545
1546 static struct lmv_tgt_desc *
1547 lmv_locate_tgt_by_name(struct lmv_obd *lmv, struct lmv_stripe_md *lsm,
1548                        const char *name, int namelen, struct lu_fid *fid,
1549                        __u32 *mds, bool new_layout)
1550 {
1551         struct lmv_tgt_desc *tgt;
1552         const struct lmv_oinfo *oinfo;
1553
1554         if (!lmv_dir_striped(lsm) || !namelen) {
1555                 tgt = lmv_fid2tgt(lmv, fid);
1556                 if (IS_ERR(tgt))
1557                         return tgt;
1558
1559                 *mds = tgt->ltd_index;
1560                 return tgt;
1561         }
1562
1563         if (OBD_FAIL_CHECK(OBD_FAIL_LFSCK_BAD_NAME_HASH)) {
1564                 if (cfs_fail_val >= lsm->lsm_md_stripe_count)
1565                         return ERR_PTR(-EBADF);
1566                 oinfo = &lsm->lsm_md_oinfo[cfs_fail_val];
1567         } else {
1568                 oinfo = lsm_name_to_stripe_info(lsm, name, namelen, new_layout);
1569                 if (IS_ERR(oinfo))
1570                         return ERR_CAST(oinfo);
1571         }
1572
1573         /* check stripe FID is sane */
1574         if (!fid_is_sane(&oinfo->lmo_fid))
1575                 return ERR_PTR(-ENODEV);
1576
1577         *fid = oinfo->lmo_fid;
1578         *mds = oinfo->lmo_mds;
1579         tgt = lmv_tgt(lmv, oinfo->lmo_mds);
1580
1581         CDEBUG(D_INODE, "locate MDT %u parent "DFID"\n", *mds, PFID(fid));
1582
1583         return tgt ? tgt : ERR_PTR(-ENODEV);
1584 }
1585
1586 /**
1587  * Locate MDT of op_data->op_fid1
1588  *
1589  * For striped directory, it will locate the stripe by name hash, if hash_type
1590  * is unknown, it will return the stripe specified by 'op_data->op_stripe_index'
1591  * which is set outside, and if dir is migrating, 'op_data->op_new_layout'
1592  * indicates whether old or new layout is used to locate.
1593  *
1594  * For plain direcotry, it just locate the MDT of op_data->op_fid1.
1595  *
1596  * \param[in] lmv       LMV device
1597  * \param[in] op_data   client MD stack parameters, name, namelen
1598  *                      mds_num etc.
1599  *
1600  * retval               pointer to the lmv_tgt_desc if succeed.
1601  *                      ERR_PTR(errno) if failed.
1602  */
1603 struct lmv_tgt_desc *
1604 lmv_locate_tgt(struct lmv_obd *lmv, struct md_op_data *op_data)
1605 {
1606         struct lmv_stripe_md *lsm = op_data->op_mea1;
1607         struct lmv_oinfo *oinfo;
1608         struct lmv_tgt_desc *tgt;
1609
1610         if (lmv_dir_foreign(lsm))
1611                 return ERR_PTR(-ENODATA);
1612
1613         /* During creating VOLATILE file, it should honor the mdt
1614          * index if the file under striped dir is being restored, see
1615          * ct_restore(). */
1616         if (op_data->op_bias & MDS_CREATE_VOLATILE &&
1617             op_data->op_mds != LMV_OFFSET_DEFAULT) {
1618                 tgt = lmv_tgt(lmv, op_data->op_mds);
1619                 if (!tgt)
1620                         return ERR_PTR(-ENODEV);
1621
1622                 if (lmv_dir_striped(lsm)) {
1623                         int i;
1624
1625                         /* refill the right parent fid */
1626                         for (i = 0; i < lsm->lsm_md_stripe_count; i++) {
1627                                 oinfo = &lsm->lsm_md_oinfo[i];
1628                                 if (oinfo->lmo_mds == op_data->op_mds) {
1629                                         op_data->op_fid1 = oinfo->lmo_fid;
1630                                         break;
1631                                 }
1632                         }
1633
1634                         if (i == lsm->lsm_md_stripe_count)
1635                                 op_data->op_fid1 = lsm->lsm_md_oinfo[0].lmo_fid;
1636                 }
1637         } else if (lmv_dir_bad_hash(lsm)) {
1638                 LASSERT(op_data->op_stripe_index < lsm->lsm_md_stripe_count);
1639                 oinfo = &lsm->lsm_md_oinfo[op_data->op_stripe_index];
1640
1641                 op_data->op_fid1 = oinfo->lmo_fid;
1642                 op_data->op_mds = oinfo->lmo_mds;
1643                 tgt = lmv_tgt(lmv, oinfo->lmo_mds);
1644                 if (!tgt)
1645                         return ERR_PTR(-ENODEV);
1646         } else {
1647                 tgt = lmv_locate_tgt_by_name(lmv, op_data->op_mea1,
1648                                 op_data->op_name, op_data->op_namelen,
1649                                 &op_data->op_fid1, &op_data->op_mds,
1650                                 op_data->op_new_layout);
1651         }
1652
1653         return tgt;
1654 }
1655
1656 /* Locate MDT of op_data->op_fid2 for link/rename */
1657 static struct lmv_tgt_desc *
1658 lmv_locate_tgt2(struct lmv_obd *lmv, struct md_op_data *op_data)
1659 {
1660         struct lmv_tgt_desc *tgt;
1661         int rc;
1662
1663         LASSERT(op_data->op_name);
1664         if (lmv_dir_layout_changing(op_data->op_mea2)) {
1665                 struct lu_fid fid1 = op_data->op_fid1;
1666                 struct lmv_stripe_md *lsm1 = op_data->op_mea1;
1667                 struct ptlrpc_request *request = NULL;
1668
1669                 /*
1670                  * avoid creating new file under old layout of migrating
1671                  * directory, check it here.
1672                  */
1673                 tgt = lmv_locate_tgt_by_name(lmv, op_data->op_mea2,
1674                                 op_data->op_name, op_data->op_namelen,
1675                                 &op_data->op_fid2, &op_data->op_mds, false);
1676                 if (IS_ERR(tgt))
1677                         RETURN(tgt);
1678
1679                 op_data->op_fid1 = op_data->op_fid2;
1680                 op_data->op_mea1 = op_data->op_mea2;
1681                 rc = md_getattr_name(tgt->ltd_exp, op_data, &request);
1682                 op_data->op_fid1 = fid1;
1683                 op_data->op_mea1 = lsm1;
1684                 if (!rc) {
1685                         ptlrpc_req_finished(request);
1686                         RETURN(ERR_PTR(-EEXIST));
1687                 }
1688
1689                 if (rc != -ENOENT)
1690                         RETURN(ERR_PTR(rc));
1691         }
1692
1693         return lmv_locate_tgt_by_name(lmv, op_data->op_mea2, op_data->op_name,
1694                                 op_data->op_namelen, &op_data->op_fid2,
1695                                 &op_data->op_mds, true);
1696 }
1697
1698 int lmv_old_layout_lookup(struct lmv_obd *lmv, struct md_op_data *op_data)
1699 {
1700         struct lu_tgt_desc *tgt;
1701         struct ptlrpc_request *request;
1702         int rc;
1703
1704         LASSERT(lmv_dir_layout_changing(op_data->op_mea1));
1705         LASSERT(!op_data->op_new_layout);
1706
1707         tgt = lmv_locate_tgt(lmv, op_data);
1708         if (IS_ERR(tgt))
1709                 return PTR_ERR(tgt);
1710
1711         rc = md_getattr_name(tgt->ltd_exp, op_data, &request);
1712         if (!rc) {
1713                 ptlrpc_req_finished(request);
1714                 return -EEXIST;
1715         }
1716
1717         return rc;
1718 }
1719
1720 /* mkdir by QoS in two cases:
1721  * 1. 'lfs mkdir -i -1'
1722  * 2. parent default LMV master_mdt_index is -1
1723  *
1724  * NB, mkdir by QoS only if parent is not striped, this is to avoid remote
1725  * directories under striped directory.
1726  */
1727 static inline bool lmv_op_qos_mkdir(const struct md_op_data *op_data)
1728 {
1729         const struct lmv_stripe_md *lsm = op_data->op_default_mea1;
1730         const struct lmv_user_md *lum = op_data->op_data;
1731
1732         if (op_data->op_code != LUSTRE_OPC_MKDIR)
1733                 return false;
1734
1735         if (lmv_dir_striped(op_data->op_mea1))
1736                 return false;
1737
1738         if (op_data->op_cli_flags & CLI_SET_MEA && lum &&
1739             (le32_to_cpu(lum->lum_magic) == LMV_USER_MAGIC ||
1740              le32_to_cpu(lum->lum_magic) == LMV_USER_MAGIC_SPECIFIC) &&
1741             le32_to_cpu(lum->lum_stripe_offset) == LMV_OFFSET_DEFAULT)
1742                 return true;
1743
1744         if (lsm && lsm->lsm_md_master_mdt_index == LMV_OFFSET_DEFAULT)
1745                 return true;
1746
1747         return false;
1748 }
1749
1750 /* 'lfs mkdir -i <specific_MDT>' */
1751 static inline bool lmv_op_user_specific_mkdir(const struct md_op_data *op_data)
1752 {
1753         const struct lmv_user_md *lum = op_data->op_data;
1754
1755         return op_data->op_code == LUSTRE_OPC_MKDIR &&
1756                op_data->op_cli_flags & CLI_SET_MEA && lum &&
1757                (le32_to_cpu(lum->lum_magic) == LMV_USER_MAGIC ||
1758                 le32_to_cpu(lum->lum_magic) == LMV_USER_MAGIC_SPECIFIC) &&
1759                le32_to_cpu(lum->lum_stripe_offset) != LMV_OFFSET_DEFAULT;
1760 }
1761
1762 /* parent default LMV master_mdt_index is not -1. */
1763 static inline bool
1764 lmv_op_default_specific_mkdir(const struct md_op_data *op_data)
1765 {
1766         return op_data->op_code == LUSTRE_OPC_MKDIR &&
1767                op_data->op_default_mea1 &&
1768                op_data->op_default_mea1->lsm_md_master_mdt_index !=
1769                         LMV_OFFSET_DEFAULT;
1770 }
1771 int lmv_create(struct obd_export *exp, struct md_op_data *op_data,
1772                 const void *data, size_t datalen, umode_t mode, uid_t uid,
1773                 gid_t gid, cfs_cap_t cap_effective, __u64 rdev,
1774                 struct ptlrpc_request **request)
1775 {
1776         struct obd_device *obd = exp->exp_obd;
1777         struct lmv_obd *lmv = &obd->u.lmv;
1778         struct lmv_tgt_desc *tgt;
1779         struct mdt_body *repbody;
1780         int rc;
1781
1782         ENTRY;
1783
1784         if (!lmv->lmv_mdt_descs.ltd_lmv_desc.ld_active_tgt_count)
1785                 RETURN(-EIO);
1786
1787         if (lmv_dir_bad_hash(op_data->op_mea1))
1788                 RETURN(-EBADF);
1789
1790         if (lmv_dir_layout_changing(op_data->op_mea1)) {
1791                 /*
1792                  * if parent is migrating, create() needs to lookup existing
1793                  * name in both old and new layout, check old layout on client.
1794                  */
1795                 rc = lmv_old_layout_lookup(lmv, op_data);
1796                 if (rc != -ENOENT)
1797                         RETURN(rc);
1798
1799                 op_data->op_new_layout = true;
1800         }
1801
1802         tgt = lmv_locate_tgt(lmv, op_data);
1803         if (IS_ERR(tgt))
1804                 RETURN(PTR_ERR(tgt));
1805
1806         if (lmv_op_user_specific_mkdir(op_data)) {
1807                 struct lmv_user_md *lum = op_data->op_data;
1808
1809                 op_data->op_mds = le32_to_cpu(lum->lum_stripe_offset);
1810                 tgt = lmv_tgt(lmv, op_data->op_mds);
1811                 if (!tgt)
1812                         RETURN(-ENODEV);
1813         } else if (lmv_op_default_specific_mkdir(op_data)) {
1814                 op_data->op_mds =
1815                         op_data->op_default_mea1->lsm_md_master_mdt_index;
1816                 tgt = lmv_tgt(lmv, op_data->op_mds);
1817                 if (!tgt)
1818                         RETURN(-ENODEV);
1819         } else if (lmv_op_qos_mkdir(op_data)) {
1820                 tgt = lmv_locate_tgt_qos(lmv, &op_data->op_mds);
1821                 if (tgt == ERR_PTR(-EAGAIN))
1822                         tgt = lmv_locate_tgt_rr(lmv, &op_data->op_mds);
1823                 if (IS_ERR(tgt))
1824                         RETURN(PTR_ERR(tgt));
1825                 /*
1826                  * only update statfs after QoS mkdir, this means the cached
1827                  * statfs may be stale, and current mkdir may not follow QoS
1828                  * accurately, but it's not serious, and avoids periodic statfs
1829                  * when client doesn't mkdir by QoS.
1830                  */
1831                 lmv_statfs_check_update(obd, tgt);
1832         }
1833
1834 retry:
1835         rc = lmv_fid_alloc(NULL, exp, &op_data->op_fid2, op_data);
1836         if (rc)
1837                 RETURN(rc);
1838
1839         CDEBUG(D_INODE, "CREATE name '%.*s' "DFID" on "DFID" -> mds #%x\n",
1840                 (int)op_data->op_namelen, op_data->op_name,
1841                 PFID(&op_data->op_fid2), PFID(&op_data->op_fid1),
1842                 op_data->op_mds);
1843
1844         op_data->op_flags |= MF_MDC_CANCEL_FID1;
1845         rc = md_create(tgt->ltd_exp, op_data, data, datalen, mode, uid, gid,
1846                        cap_effective, rdev, request);
1847         if (rc == 0) {
1848                 if (*request == NULL)
1849                         RETURN(rc);
1850                 CDEBUG(D_INODE, "Created - "DFID"\n", PFID(&op_data->op_fid2));
1851         }
1852
1853         /* dir restripe needs to send to MDT where dir is located */
1854         if (rc != -EREMOTE ||
1855             !(exp_connect_flags2(exp) & OBD_CONNECT2_CRUSH))
1856                 RETURN(rc);
1857
1858         repbody = req_capsule_server_get(&(*request)->rq_pill, &RMF_MDT_BODY);
1859         if (repbody == NULL)
1860                 RETURN(-EPROTO);
1861
1862         /* Not cross-ref case, just get out of here. */
1863         if (likely(!(repbody->mbo_valid & OBD_MD_MDS)))
1864                 RETURN(rc);
1865
1866         op_data->op_fid2 = repbody->mbo_fid1;
1867         ptlrpc_req_finished(*request);
1868         *request = NULL;
1869
1870         tgt = lmv_fid2tgt(lmv, &op_data->op_fid2);
1871         if (IS_ERR(tgt))
1872                 RETURN(PTR_ERR(tgt));
1873
1874         op_data->op_mds = tgt->ltd_index;
1875         goto retry;
1876 }
1877
1878 static int
1879 lmv_enqueue(struct obd_export *exp, struct ldlm_enqueue_info *einfo,
1880             const union ldlm_policy_data *policy, struct md_op_data *op_data,
1881             struct lustre_handle *lockh, __u64 extra_lock_flags)
1882 {
1883         struct obd_device *obd = exp->exp_obd;
1884         struct lmv_obd *lmv = &obd->u.lmv;
1885         struct lmv_tgt_desc *tgt;
1886         int rc;
1887
1888         ENTRY;
1889
1890         CDEBUG(D_INODE, "ENQUEUE on "DFID"\n", PFID(&op_data->op_fid1));
1891
1892         tgt = lmv_fid2tgt(lmv, &op_data->op_fid1);
1893         if (IS_ERR(tgt))
1894                 RETURN(PTR_ERR(tgt));
1895
1896         CDEBUG(D_INODE, "ENQUEUE on "DFID" -> mds #%u\n",
1897                PFID(&op_data->op_fid1), tgt->ltd_index);
1898
1899         rc = md_enqueue(tgt->ltd_exp, einfo, policy, op_data, lockh,
1900                         extra_lock_flags);
1901
1902         RETURN(rc);
1903 }
1904
1905 int
1906 lmv_getattr_name(struct obd_export *exp,struct md_op_data *op_data,
1907                  struct ptlrpc_request **preq)
1908 {
1909         struct obd_device *obd = exp->exp_obd;
1910         struct lmv_obd *lmv = &obd->u.lmv;
1911         struct lmv_tgt_desc *tgt;
1912         struct mdt_body *body;
1913         int rc;
1914
1915         ENTRY;
1916
1917 retry:
1918         tgt = lmv_locate_tgt(lmv, op_data);
1919         if (IS_ERR(tgt))
1920                 RETURN(PTR_ERR(tgt));
1921
1922         CDEBUG(D_INODE, "GETATTR_NAME for %*s on "DFID" -> mds #%d\n",
1923                 (int)op_data->op_namelen, op_data->op_name,
1924                 PFID(&op_data->op_fid1), tgt->ltd_index);
1925
1926         rc = md_getattr_name(tgt->ltd_exp, op_data, preq);
1927         if (rc == -ENOENT && lmv_dir_retry_check_update(op_data)) {
1928                 ptlrpc_req_finished(*preq);
1929                 *preq = NULL;
1930                 goto retry;
1931         }
1932
1933         if (rc)
1934                 RETURN(rc);
1935
1936         body = req_capsule_server_get(&(*preq)->rq_pill, &RMF_MDT_BODY);
1937         LASSERT(body != NULL);
1938
1939         if (body->mbo_valid & OBD_MD_MDS) {
1940                 op_data->op_fid1 = body->mbo_fid1;
1941                 op_data->op_valid |= OBD_MD_FLCROSSREF;
1942                 op_data->op_namelen = 0;
1943                 op_data->op_name = NULL;
1944
1945                 ptlrpc_req_finished(*preq);
1946                 *preq = NULL;
1947
1948                 goto retry;
1949         }
1950
1951         RETURN(rc);
1952 }
1953
1954 #define md_op_data_fid(op_data, fl)                     \
1955         (fl == MF_MDC_CANCEL_FID1 ? &op_data->op_fid1 : \
1956          fl == MF_MDC_CANCEL_FID2 ? &op_data->op_fid2 : \
1957          fl == MF_MDC_CANCEL_FID3 ? &op_data->op_fid3 : \
1958          fl == MF_MDC_CANCEL_FID4 ? &op_data->op_fid4 : \
1959          NULL)
1960
1961 static int lmv_early_cancel(struct obd_export *exp, struct lmv_tgt_desc *tgt,
1962                             struct md_op_data *op_data, __u32 op_tgt,
1963                             enum ldlm_mode mode, int bits, int flag)
1964 {
1965         struct lu_fid *fid = md_op_data_fid(op_data, flag);
1966         struct lmv_obd *lmv = &exp->exp_obd->u.lmv;
1967         union ldlm_policy_data policy = { { 0 } };
1968         int rc = 0;
1969         ENTRY;
1970
1971         if (!fid_is_sane(fid))
1972                 RETURN(0);
1973
1974         if (tgt == NULL) {
1975                 tgt = lmv_fid2tgt(lmv, fid);
1976                 if (IS_ERR(tgt))
1977                         RETURN(PTR_ERR(tgt));
1978         }
1979
1980         if (tgt->ltd_index != op_tgt) {
1981                 CDEBUG(D_INODE, "EARLY_CANCEL on "DFID"\n", PFID(fid));
1982                 policy.l_inodebits.bits = bits;
1983                 rc = md_cancel_unused(tgt->ltd_exp, fid, &policy,
1984                                       mode, LCF_ASYNC, NULL);
1985         } else {
1986                 CDEBUG(D_INODE,
1987                        "EARLY_CANCEL skip operation target %d on "DFID"\n",
1988                        op_tgt, PFID(fid));
1989                 op_data->op_flags |= flag;
1990                 rc = 0;
1991         }
1992
1993         RETURN(rc);
1994 }
1995
1996 /*
1997  * llite passes fid of an target inode in op_data->op_fid1 and id of directory in
1998  * op_data->op_fid2
1999  */
2000 static int lmv_link(struct obd_export *exp, struct md_op_data *op_data,
2001                     struct ptlrpc_request **request)
2002 {
2003         struct obd_device       *obd = exp->exp_obd;
2004         struct lmv_obd          *lmv = &obd->u.lmv;
2005         struct lmv_tgt_desc     *tgt;
2006         int                      rc;
2007         ENTRY;
2008
2009         LASSERT(op_data->op_namelen != 0);
2010
2011         CDEBUG(D_INODE, "LINK "DFID":%*s to "DFID"\n",
2012                PFID(&op_data->op_fid2), (int)op_data->op_namelen,
2013                op_data->op_name, PFID(&op_data->op_fid1));
2014
2015         op_data->op_fsuid = from_kuid(&init_user_ns, current_fsuid());
2016         op_data->op_fsgid = from_kgid(&init_user_ns, current_fsgid());
2017         op_data->op_cap = cfs_curproc_cap_pack();
2018
2019         tgt = lmv_locate_tgt2(lmv, op_data);
2020         if (IS_ERR(tgt))
2021                 RETURN(PTR_ERR(tgt));
2022
2023         /*
2024          * Cancel UPDATE lock on child (fid1).
2025          */
2026         op_data->op_flags |= MF_MDC_CANCEL_FID2;
2027         rc = lmv_early_cancel(exp, NULL, op_data, tgt->ltd_index, LCK_EX,
2028                               MDS_INODELOCK_UPDATE, MF_MDC_CANCEL_FID1);
2029         if (rc != 0)
2030                 RETURN(rc);
2031
2032         rc = md_link(tgt->ltd_exp, op_data, request);
2033
2034         RETURN(rc);
2035 }
2036
2037 static int lmv_migrate(struct obd_export *exp, struct md_op_data *op_data,
2038                         const char *name, size_t namelen,
2039                         struct ptlrpc_request **request)
2040 {
2041         struct obd_device *obd = exp->exp_obd;
2042         struct lmv_obd *lmv = &obd->u.lmv;
2043         struct lmv_stripe_md *lsm = op_data->op_mea1;
2044         struct lmv_tgt_desc *parent_tgt;
2045         struct lmv_tgt_desc *sp_tgt;
2046         struct lmv_tgt_desc *tp_tgt = NULL;
2047         struct lmv_tgt_desc *child_tgt;
2048         struct lmv_tgt_desc *tgt;
2049         struct lu_fid target_fid = { 0 };
2050         int rc;
2051
2052         ENTRY;
2053
2054         LASSERT(op_data->op_cli_flags & CLI_MIGRATE);
2055
2056         CDEBUG(D_INODE, "MIGRATE "DFID"/%.*s\n",
2057                PFID(&op_data->op_fid1), (int)namelen, name);
2058
2059         op_data->op_fsuid = from_kuid(&init_user_ns, current_fsuid());
2060         op_data->op_fsgid = from_kgid(&init_user_ns, current_fsgid());
2061         op_data->op_cap = cfs_curproc_cap_pack();
2062
2063         parent_tgt = lmv_fid2tgt(lmv, &op_data->op_fid1);
2064         if (IS_ERR(parent_tgt))
2065                 RETURN(PTR_ERR(parent_tgt));
2066
2067         if (lmv_dir_striped(lsm)) {
2068                 const struct lmv_oinfo *oinfo;
2069
2070                 oinfo = lsm_name_to_stripe_info(lsm, name, namelen, false);
2071                 if (IS_ERR(oinfo))
2072                         RETURN(PTR_ERR(oinfo));
2073
2074                 /* save source stripe FID in fid4 temporarily for ELC */
2075                 op_data->op_fid4 = oinfo->lmo_fid;
2076                 sp_tgt = lmv_tgt(lmv, oinfo->lmo_mds);
2077                 if (!sp_tgt)
2078                         RETURN(-ENODEV);
2079
2080                 /*
2081                  * if parent is being migrated too, fill op_fid2 with target
2082                  * stripe fid, otherwise the target stripe is not created yet.
2083                  */
2084                 if (lmv_dir_layout_changing(lsm)) {
2085                         oinfo = lsm_name_to_stripe_info(lsm, name, namelen,
2086                                                         true);
2087                         if (IS_ERR(oinfo))
2088                                 RETURN(PTR_ERR(oinfo));
2089
2090                         op_data->op_fid2 = oinfo->lmo_fid;
2091                         tp_tgt = lmv_tgt(lmv, oinfo->lmo_mds);
2092                         if (!tp_tgt)
2093                                 RETURN(-ENODEV);
2094                 }
2095         } else {
2096                 sp_tgt = parent_tgt;
2097         }
2098
2099         child_tgt = lmv_fid2tgt(lmv, &op_data->op_fid3);
2100         if (IS_ERR(child_tgt))
2101                 RETURN(PTR_ERR(child_tgt));
2102
2103         /* for directory, migrate to MDT specified by lum_stripe_offset;
2104          * otherwise migrate to the target stripe of parent, but parent
2105          * directory may have finished migration (normally current file too),
2106          * allocate FID on MDT lum_stripe_offset, and server will check
2107          * whether file was migrated already.
2108          */
2109         if (S_ISDIR(op_data->op_mode) || !tp_tgt) {
2110                 struct lmv_user_md *lum = op_data->op_data;
2111
2112                 op_data->op_mds = le32_to_cpu(lum->lum_stripe_offset);
2113         } else  {
2114                 op_data->op_mds = tp_tgt->ltd_index;
2115         }
2116         rc = lmv_fid_alloc(NULL, exp, &target_fid, op_data);
2117         if (rc)
2118                 RETURN(rc);
2119
2120         /*
2121          * for directory, send migrate request to the MDT where the object will
2122          * be migrated to, because we can't create a striped directory remotely.
2123          *
2124          * otherwise, send to the MDT where source is located because regular
2125          * file may open lease.
2126          *
2127          * NB. if MDT doesn't support DIR_MIGRATE, send to source MDT too for
2128          * backward compatibility.
2129          */
2130         if (S_ISDIR(op_data->op_mode) &&
2131             (exp_connect_flags2(exp) & OBD_CONNECT2_DIR_MIGRATE)) {
2132                 tgt = lmv_fid2tgt(lmv, &target_fid);
2133                 if (IS_ERR(tgt))
2134                         RETURN(PTR_ERR(tgt));
2135         } else {
2136                 tgt = child_tgt;
2137         }
2138
2139         /* cancel UPDATE lock of parent master object */
2140         rc = lmv_early_cancel(exp, parent_tgt, op_data, tgt->ltd_index, LCK_EX,
2141                               MDS_INODELOCK_UPDATE, MF_MDC_CANCEL_FID1);
2142         if (rc)
2143                 RETURN(rc);
2144
2145         /* cancel UPDATE lock of source parent */
2146         if (sp_tgt != parent_tgt) {
2147                 /*
2148                  * migrate RPC packs master object FID, because we can only pack
2149                  * two FIDs in reint RPC, but MDS needs to know both source
2150                  * parent and target parent, and it will obtain them from master
2151                  * FID and LMV, the other FID in RPC is kept for target.
2152                  *
2153                  * since this FID is not passed to MDC, cancel it anyway.
2154                  */
2155                 rc = lmv_early_cancel(exp, sp_tgt, op_data, -1, LCK_EX,
2156                                       MDS_INODELOCK_UPDATE, MF_MDC_CANCEL_FID4);
2157                 if (rc)
2158                         RETURN(rc);
2159
2160                 op_data->op_flags &= ~MF_MDC_CANCEL_FID4;
2161         }
2162         op_data->op_fid4 = target_fid;
2163
2164         /* cancel UPDATE locks of target parent */
2165         rc = lmv_early_cancel(exp, tp_tgt, op_data, tgt->ltd_index, LCK_EX,
2166                               MDS_INODELOCK_UPDATE, MF_MDC_CANCEL_FID2);
2167         if (rc)
2168                 RETURN(rc);
2169
2170         /* cancel LOOKUP lock of source if source is remote object */
2171         if (child_tgt != sp_tgt) {
2172                 rc = lmv_early_cancel(exp, sp_tgt, op_data, tgt->ltd_index,
2173                                       LCK_EX, MDS_INODELOCK_LOOKUP,
2174                                       MF_MDC_CANCEL_FID3);
2175                 if (rc)
2176                         RETURN(rc);
2177         }
2178
2179         /* cancel ELC locks of source */
2180         rc = lmv_early_cancel(exp, child_tgt, op_data, tgt->ltd_index, LCK_EX,
2181                               MDS_INODELOCK_ELC, MF_MDC_CANCEL_FID3);
2182         if (rc)
2183                 RETURN(rc);
2184
2185         rc = md_rename(tgt->ltd_exp, op_data, name, namelen, NULL, 0, request);
2186
2187         RETURN(rc);
2188 }
2189
2190 static int lmv_rename(struct obd_export *exp, struct md_op_data *op_data,
2191                       const char *old, size_t oldlen,
2192                       const char *new, size_t newlen,
2193                       struct ptlrpc_request **request)
2194 {
2195         struct obd_device *obd = exp->exp_obd;
2196         struct lmv_obd *lmv = &obd->u.lmv;
2197         struct lmv_tgt_desc *sp_tgt;
2198         struct lmv_tgt_desc *tp_tgt = NULL;
2199         struct lmv_tgt_desc *src_tgt = NULL;
2200         struct lmv_tgt_desc *tgt;
2201         struct mdt_body *body;
2202         int rc;
2203
2204         ENTRY;
2205
2206         LASSERT(oldlen != 0);
2207
2208         if (op_data->op_cli_flags & CLI_MIGRATE) {
2209                 rc = lmv_migrate(exp, op_data, old, oldlen, request);
2210                 RETURN(rc);
2211         }
2212
2213         op_data->op_fsuid = from_kuid(&init_user_ns, current_fsuid());
2214         op_data->op_fsgid = from_kgid(&init_user_ns, current_fsgid());
2215         op_data->op_cap = cfs_curproc_cap_pack();
2216
2217         op_data->op_name = new;
2218         op_data->op_namelen = newlen;
2219
2220         tp_tgt = lmv_locate_tgt2(lmv, op_data);
2221         if (IS_ERR(tp_tgt))
2222                 RETURN(PTR_ERR(tp_tgt));
2223
2224         /* Since the target child might be destroyed, and it might become
2225          * orphan, and we can only check orphan on the local MDT right now, so
2226          * we send rename request to the MDT where target child is located. If
2227          * target child does not exist, then it will send the request to the
2228          * target parent */
2229         if (fid_is_sane(&op_data->op_fid4)) {
2230                 tgt = lmv_fid2tgt(lmv, &op_data->op_fid4);
2231                 if (IS_ERR(tgt))
2232                         RETURN(PTR_ERR(tgt));
2233         } else {
2234                 tgt = tp_tgt;
2235         }
2236
2237         op_data->op_flags |= MF_MDC_CANCEL_FID4;
2238
2239         /* cancel UPDATE locks of target parent */
2240         rc = lmv_early_cancel(exp, tp_tgt, op_data, tgt->ltd_index, LCK_EX,
2241                               MDS_INODELOCK_UPDATE, MF_MDC_CANCEL_FID2);
2242         if (rc != 0)
2243                 RETURN(rc);
2244
2245         if (fid_is_sane(&op_data->op_fid4)) {
2246                 /* cancel LOOKUP lock of target on target parent */
2247                 if (tgt != tp_tgt) {
2248                         rc = lmv_early_cancel(exp, tp_tgt, op_data,
2249                                               tgt->ltd_index, LCK_EX,
2250                                               MDS_INODELOCK_LOOKUP,
2251                                               MF_MDC_CANCEL_FID4);
2252                         if (rc != 0)
2253                                 RETURN(rc);
2254                 }
2255         }
2256
2257         if (fid_is_sane(&op_data->op_fid3)) {
2258                 src_tgt = lmv_fid2tgt(lmv, &op_data->op_fid3);
2259                 if (IS_ERR(src_tgt))
2260                         RETURN(PTR_ERR(src_tgt));
2261
2262                 /* cancel ELC locks of source */
2263                 rc = lmv_early_cancel(exp, src_tgt, op_data, tgt->ltd_index,
2264                                       LCK_EX, MDS_INODELOCK_ELC,
2265                                       MF_MDC_CANCEL_FID3);
2266                 if (rc != 0)
2267                         RETURN(rc);
2268         }
2269
2270         op_data->op_name = old;
2271         op_data->op_namelen = oldlen;
2272 retry:
2273         sp_tgt = lmv_locate_tgt(lmv, op_data);
2274         if (IS_ERR(sp_tgt))
2275                 RETURN(PTR_ERR(sp_tgt));
2276
2277         /* cancel UPDATE locks of source parent */
2278         rc = lmv_early_cancel(exp, sp_tgt, op_data, tgt->ltd_index, LCK_EX,
2279                               MDS_INODELOCK_UPDATE, MF_MDC_CANCEL_FID1);
2280         if (rc != 0)
2281                 RETURN(rc);
2282
2283         if (fid_is_sane(&op_data->op_fid3)) {
2284                 /* cancel LOOKUP lock of source on source parent */
2285                 if (src_tgt != sp_tgt) {
2286                         rc = lmv_early_cancel(exp, sp_tgt, op_data,
2287                                               tgt->ltd_index, LCK_EX,
2288                                               MDS_INODELOCK_LOOKUP,
2289                                               MF_MDC_CANCEL_FID3);
2290                         if (rc != 0)
2291                                 RETURN(rc);
2292                 }
2293         }
2294
2295 rename:
2296         CDEBUG(D_INODE, "RENAME "DFID"/%.*s to "DFID"/%.*s\n",
2297                 PFID(&op_data->op_fid1), (int)oldlen, old,
2298                 PFID(&op_data->op_fid2), (int)newlen, new);
2299
2300         rc = md_rename(tgt->ltd_exp, op_data, old, oldlen, new, newlen,
2301                         request);
2302         if (rc == -ENOENT && lmv_dir_retry_check_update(op_data)) {
2303                 ptlrpc_req_finished(*request);
2304                 *request = NULL;
2305                 goto retry;
2306         }
2307
2308         if (rc && rc != -EXDEV)
2309                 RETURN(rc);
2310
2311         body = req_capsule_server_get(&(*request)->rq_pill, &RMF_MDT_BODY);
2312         if (body == NULL)
2313                 RETURN(-EPROTO);
2314
2315         /* Not cross-ref case, just get out of here. */
2316         if (likely(!(body->mbo_valid & OBD_MD_MDS)))
2317                 RETURN(rc);
2318
2319         op_data->op_fid4 = body->mbo_fid1;
2320
2321         ptlrpc_req_finished(*request);
2322         *request = NULL;
2323
2324         tgt = lmv_fid2tgt(lmv, &op_data->op_fid4);
2325         if (IS_ERR(tgt))
2326                 RETURN(PTR_ERR(tgt));
2327
2328         if (fid_is_sane(&op_data->op_fid4)) {
2329                 /* cancel LOOKUP lock of target on target parent */
2330                 if (tgt != tp_tgt) {
2331                         rc = lmv_early_cancel(exp, tp_tgt, op_data,
2332                                               tgt->ltd_index, LCK_EX,
2333                                               MDS_INODELOCK_LOOKUP,
2334                                               MF_MDC_CANCEL_FID4);
2335                         if (rc != 0)
2336                                 RETURN(rc);
2337                 }
2338         }
2339
2340         goto rename;
2341 }
2342
2343 static int lmv_setattr(struct obd_export *exp, struct md_op_data *op_data,
2344                        void *ea, size_t ealen, struct ptlrpc_request **request)
2345 {
2346         struct obd_device *obd = exp->exp_obd;
2347         struct lmv_obd *lmv = &obd->u.lmv;
2348         struct lmv_tgt_desc *tgt;
2349         int rc = 0;
2350
2351         ENTRY;
2352
2353         CDEBUG(D_INODE, "SETATTR for "DFID", valid 0x%x/0x%x\n",
2354                PFID(&op_data->op_fid1), op_data->op_attr.ia_valid,
2355                op_data->op_xvalid);
2356
2357         op_data->op_flags |= MF_MDC_CANCEL_FID1;
2358         tgt = lmv_fid2tgt(lmv, &op_data->op_fid1);
2359         if (IS_ERR(tgt))
2360                 RETURN(PTR_ERR(tgt));
2361
2362         rc = md_setattr(tgt->ltd_exp, op_data, ea, ealen, request);
2363
2364         RETURN(rc);
2365 }
2366
2367 static int lmv_fsync(struct obd_export *exp, const struct lu_fid *fid,
2368                      struct ptlrpc_request **request)
2369 {
2370         struct obd_device *obd = exp->exp_obd;
2371         struct lmv_obd *lmv = &obd->u.lmv;
2372         struct lmv_tgt_desc *tgt;
2373         int rc;
2374
2375         ENTRY;
2376
2377         tgt = lmv_fid2tgt(lmv, fid);
2378         if (IS_ERR(tgt))
2379                 RETURN(PTR_ERR(tgt));
2380
2381         rc = md_fsync(tgt->ltd_exp, fid, request);
2382         RETURN(rc);
2383 }
2384
2385 struct stripe_dirent {
2386         struct page             *sd_page;
2387         struct lu_dirpage       *sd_dp;
2388         struct lu_dirent        *sd_ent;
2389         bool                     sd_eof;
2390 };
2391
2392 struct lmv_dir_ctxt {
2393         struct lmv_obd          *ldc_lmv;
2394         struct md_op_data       *ldc_op_data;
2395         struct md_callback      *ldc_cb_op;
2396         __u64                    ldc_hash;
2397         int                      ldc_count;
2398         struct stripe_dirent     ldc_stripes[0];
2399 };
2400
2401 static inline void stripe_dirent_unload(struct stripe_dirent *stripe)
2402 {
2403         if (stripe->sd_page) {
2404                 kunmap(stripe->sd_page);
2405                 put_page(stripe->sd_page);
2406                 stripe->sd_page = NULL;
2407                 stripe->sd_ent = NULL;
2408         }
2409 }
2410
2411 static inline void put_lmv_dir_ctxt(struct lmv_dir_ctxt *ctxt)
2412 {
2413         int i;
2414
2415         for (i = 0; i < ctxt->ldc_count; i++)
2416                 stripe_dirent_unload(&ctxt->ldc_stripes[i]);
2417 }
2418
2419 /* if @ent is dummy, or . .., get next */
2420 static struct lu_dirent *stripe_dirent_get(struct lmv_dir_ctxt *ctxt,
2421                                            struct lu_dirent *ent,
2422                                            int stripe_index)
2423 {
2424         for (; ent; ent = lu_dirent_next(ent)) {
2425                 /* Skip dummy entry */
2426                 if (le16_to_cpu(ent->lde_namelen) == 0)
2427                         continue;
2428
2429                 /* skip . and .. for other stripes */
2430                 if (stripe_index &&
2431                     (strncmp(ent->lde_name, ".",
2432                              le16_to_cpu(ent->lde_namelen)) == 0 ||
2433                      strncmp(ent->lde_name, "..",
2434                              le16_to_cpu(ent->lde_namelen)) == 0))
2435                         continue;
2436
2437                 if (le64_to_cpu(ent->lde_hash) >= ctxt->ldc_hash)
2438                         break;
2439         }
2440
2441         return ent;
2442 }
2443
2444 static struct lu_dirent *stripe_dirent_load(struct lmv_dir_ctxt *ctxt,
2445                                             struct stripe_dirent *stripe,
2446                                             int stripe_index)
2447 {
2448         struct md_op_data *op_data = ctxt->ldc_op_data;
2449         struct lmv_oinfo *oinfo;
2450         struct lu_fid fid = op_data->op_fid1;
2451         struct inode *inode = op_data->op_data;
2452         struct lmv_tgt_desc *tgt;
2453         struct lu_dirent *ent = stripe->sd_ent;
2454         __u64 hash = ctxt->ldc_hash;
2455         int rc = 0;
2456
2457         ENTRY;
2458
2459         LASSERT(stripe == &ctxt->ldc_stripes[stripe_index]);
2460         LASSERT(!ent);
2461
2462         do {
2463                 if (stripe->sd_page) {
2464                         __u64 end = le64_to_cpu(stripe->sd_dp->ldp_hash_end);
2465
2466                         /* @hash should be the last dirent hash */
2467                         LASSERTF(hash <= end,
2468                                  "ctxt@%p stripe@%p hash %llx end %llx\n",
2469                                  ctxt, stripe, hash, end);
2470                         /* unload last page */
2471                         stripe_dirent_unload(stripe);
2472                         /* eof */
2473                         if (end == MDS_DIR_END_OFF) {
2474                                 stripe->sd_eof = true;
2475                                 break;
2476                         }
2477                         hash = end;
2478                 }
2479
2480                 oinfo = &op_data->op_mea1->lsm_md_oinfo[stripe_index];
2481                 if (!oinfo->lmo_root) {
2482                         rc = -ENOENT;
2483                         break;
2484                 }
2485
2486                 tgt = lmv_tgt(ctxt->ldc_lmv, oinfo->lmo_mds);
2487                 if (!tgt) {
2488                         rc = -ENODEV;
2489                         break;
2490                 }
2491
2492                 /* op_data is shared by stripes, reset after use */
2493                 op_data->op_fid1 = oinfo->lmo_fid;
2494                 op_data->op_fid2 = oinfo->lmo_fid;
2495                 op_data->op_data = oinfo->lmo_root;
2496
2497                 rc = md_read_page(tgt->ltd_exp, op_data, ctxt->ldc_cb_op, hash,
2498                                   &stripe->sd_page);
2499
2500                 op_data->op_fid1 = fid;
2501                 op_data->op_fid2 = fid;
2502                 op_data->op_data = inode;
2503
2504                 if (rc)
2505                         break;
2506
2507                 stripe->sd_dp = page_address(stripe->sd_page);
2508                 ent = stripe_dirent_get(ctxt, lu_dirent_start(stripe->sd_dp),
2509                                         stripe_index);
2510                 /* in case a page filled with ., .. and dummy, read next */
2511         } while (!ent);
2512
2513         stripe->sd_ent = ent;
2514         if (rc) {
2515                 LASSERT(!ent);
2516                 /* treat error as eof, so dir can be partially accessed */
2517                 stripe->sd_eof = true;
2518                 LCONSOLE_WARN("dir "DFID" stripe %d readdir failed: %d, "
2519                               "directory is partially accessed!\n",
2520                               PFID(&ctxt->ldc_op_data->op_fid1), stripe_index,
2521                               rc);
2522         }
2523
2524         RETURN(ent);
2525 }
2526
2527 static int lmv_file_resync(struct obd_export *exp, struct md_op_data *data)
2528 {
2529         struct obd_device *obd = exp->exp_obd;
2530         struct lmv_obd *lmv = &obd->u.lmv;
2531         struct lmv_tgt_desc *tgt;
2532         int rc;
2533
2534         ENTRY;
2535
2536         rc = lmv_check_connect(obd);
2537         if (rc != 0)
2538                 RETURN(rc);
2539
2540         tgt = lmv_fid2tgt(lmv, &data->op_fid1);
2541         if (IS_ERR(tgt))
2542                 RETURN(PTR_ERR(tgt));
2543
2544         data->op_flags |= MF_MDC_CANCEL_FID1;
2545         rc = md_file_resync(tgt->ltd_exp, data);
2546         RETURN(rc);
2547 }
2548
2549 /**
2550  * Get dirent with the closest hash for striped directory
2551  *
2552  * This function will search the dir entry, whose hash value is the
2553  * closest(>=) to hash from all of sub-stripes, and it is only being called
2554  * for striped directory.
2555  *
2556  * \param[in] ctxt              dir read context
2557  *
2558  * \retval                      dirent get the entry successfully
2559  *                              NULL does not get the entry, normally it means
2560  *                              it reaches the end of the directory, while read
2561  *                              stripe dirent error is ignored to allow partial
2562  *                              access.
2563  */
2564 static struct lu_dirent *lmv_dirent_next(struct lmv_dir_ctxt *ctxt)
2565 {
2566         struct stripe_dirent *stripe;
2567         struct lu_dirent *ent = NULL;
2568         int i;
2569         int min = -1;
2570
2571         /* TODO: optimize with k-way merge sort */
2572         for (i = 0; i < ctxt->ldc_count; i++) {
2573                 stripe = &ctxt->ldc_stripes[i];
2574                 if (stripe->sd_eof)
2575                         continue;
2576
2577                 if (!stripe->sd_ent) {
2578                         stripe_dirent_load(ctxt, stripe, i);
2579                         if (!stripe->sd_ent) {
2580                                 LASSERT(stripe->sd_eof);
2581                                 continue;
2582                         }
2583                 }
2584
2585                 if (min == -1 ||
2586                     le64_to_cpu(ctxt->ldc_stripes[min].sd_ent->lde_hash) >
2587                     le64_to_cpu(stripe->sd_ent->lde_hash)) {
2588                         min = i;
2589                         if (le64_to_cpu(stripe->sd_ent->lde_hash) ==
2590                             ctxt->ldc_hash)
2591                                 break;
2592                 }
2593         }
2594
2595         if (min != -1) {
2596                 stripe = &ctxt->ldc_stripes[min];
2597                 ent = stripe->sd_ent;
2598                 /* pop found dirent */
2599                 stripe->sd_ent = stripe_dirent_get(ctxt, lu_dirent_next(ent),
2600                                                    min);
2601         }
2602
2603         return ent;
2604 }
2605
2606 /**
2607  * Build dir entry page for striped directory
2608  *
2609  * This function gets one entry by @offset from a striped directory. It will
2610  * read entries from all of stripes, and choose one closest to the required
2611  * offset(&offset). A few notes
2612  * 1. skip . and .. for non-zero stripes, because there can only have one .
2613  * and .. in a directory.
2614  * 2. op_data will be shared by all of stripes, instead of allocating new
2615  * one, so need to restore before reusing.
2616  *
2617  * \param[in] exp       obd export refer to LMV
2618  * \param[in] op_data   hold those MD parameters of read_entry
2619  * \param[in] cb_op     ldlm callback being used in enqueue in mdc_read_entry
2620  * \param[in] offset    starting hash offset
2621  * \param[out] ppage    the page holding the entry. Note: because the entry
2622  *                      will be accessed in upper layer, so we need hold the
2623  *                      page until the usages of entry is finished, see
2624  *                      ll_dir_entry_next.
2625  *
2626  * retval               =0 if get entry successfully
2627  *                      <0 cannot get entry
2628  */
2629 static int lmv_striped_read_page(struct obd_export *exp,
2630                                  struct md_op_data *op_data,
2631                                  struct md_callback *cb_op,
2632                                  __u64 offset, struct page **ppage)
2633 {
2634         struct page *page = NULL;
2635         struct lu_dirpage *dp;
2636         void *start;
2637         struct lu_dirent *ent;
2638         struct lu_dirent *last_ent;
2639         int stripe_count;
2640         struct lmv_dir_ctxt *ctxt;
2641         struct lu_dirent *next = NULL;
2642         __u16 ent_size;
2643         size_t left_bytes;
2644         int rc = 0;
2645         ENTRY;
2646
2647         /* Allocate a page and read entries from all of stripes and fill
2648          * the page by hash order */
2649         page = alloc_page(GFP_KERNEL);
2650         if (!page)
2651                 RETURN(-ENOMEM);
2652
2653         /* Initialize the entry page */
2654         dp = kmap(page);
2655         memset(dp, 0, sizeof(*dp));
2656         dp->ldp_hash_start = cpu_to_le64(offset);
2657
2658         start = dp + 1;
2659         left_bytes = PAGE_SIZE - sizeof(*dp);
2660         ent = start;
2661         last_ent = ent;
2662
2663         /* initalize dir read context */
2664         stripe_count = op_data->op_mea1->lsm_md_stripe_count;
2665         OBD_ALLOC(ctxt, offsetof(typeof(*ctxt), ldc_stripes[stripe_count]));
2666         if (!ctxt)
2667                 GOTO(free_page, rc = -ENOMEM);
2668         ctxt->ldc_lmv = &exp->exp_obd->u.lmv;
2669         ctxt->ldc_op_data = op_data;
2670         ctxt->ldc_cb_op = cb_op;
2671         ctxt->ldc_hash = offset;
2672         ctxt->ldc_count = stripe_count;
2673
2674         while (1) {
2675                 next = lmv_dirent_next(ctxt);
2676
2677                 /* end of directory */
2678                 if (!next) {
2679                         ctxt->ldc_hash = MDS_DIR_END_OFF;
2680                         break;
2681                 }
2682                 ctxt->ldc_hash = le64_to_cpu(next->lde_hash);
2683
2684                 ent_size = le16_to_cpu(next->lde_reclen);
2685
2686                 /* the last entry lde_reclen is 0, but it might not be the last
2687                  * one of this temporay dir page */
2688                 if (!ent_size)
2689                         ent_size = lu_dirent_calc_size(
2690                                         le16_to_cpu(next->lde_namelen),
2691                                         le32_to_cpu(next->lde_attrs));
2692                 /* page full */
2693                 if (ent_size > left_bytes)
2694                         break;
2695
2696                 memcpy(ent, next, ent_size);
2697
2698                 /* Replace . with master FID and Replace .. with the parent FID
2699                  * of master object */
2700                 if (strncmp(ent->lde_name, ".",
2701                             le16_to_cpu(ent->lde_namelen)) == 0 &&
2702                     le16_to_cpu(ent->lde_namelen) == 1)
2703                         fid_cpu_to_le(&ent->lde_fid, &op_data->op_fid1);
2704                 else if (strncmp(ent->lde_name, "..",
2705                                    le16_to_cpu(ent->lde_namelen)) == 0 &&
2706                            le16_to_cpu(ent->lde_namelen) == 2)
2707                         fid_cpu_to_le(&ent->lde_fid, &op_data->op_fid3);
2708
2709                 CDEBUG(D_INODE, "entry %.*s hash %#llx\n",
2710                        le16_to_cpu(ent->lde_namelen), ent->lde_name,
2711                        le64_to_cpu(ent->lde_hash));
2712
2713                 left_bytes -= ent_size;
2714                 ent->lde_reclen = cpu_to_le16(ent_size);
2715                 last_ent = ent;
2716                 ent = (void *)ent + ent_size;
2717         };
2718
2719         last_ent->lde_reclen = 0;
2720
2721         if (ent == start)
2722                 dp->ldp_flags |= LDF_EMPTY;
2723         else if (ctxt->ldc_hash == le64_to_cpu(last_ent->lde_hash))
2724                 dp->ldp_flags |= LDF_COLLIDE;
2725         dp->ldp_flags = cpu_to_le32(dp->ldp_flags);
2726         dp->ldp_hash_end = cpu_to_le64(ctxt->ldc_hash);
2727
2728         put_lmv_dir_ctxt(ctxt);
2729         OBD_FREE(ctxt, offsetof(typeof(*ctxt), ldc_stripes[stripe_count]));
2730
2731         *ppage = page;
2732
2733         RETURN(0);
2734
2735 free_page:
2736         kunmap(page);
2737         __free_page(page);
2738
2739         return rc;
2740 }
2741
2742 int lmv_read_page(struct obd_export *exp, struct md_op_data *op_data,
2743                   struct md_callback *cb_op, __u64 offset,
2744                   struct page **ppage)
2745 {
2746         struct obd_device *obd = exp->exp_obd;
2747         struct lmv_obd *lmv = &obd->u.lmv;
2748         struct lmv_tgt_desc *tgt;
2749         int rc;
2750
2751         ENTRY;
2752
2753         if (unlikely(lmv_dir_foreign(op_data->op_mea1)))
2754                 RETURN(-ENODATA);
2755
2756         if (unlikely(lmv_dir_striped(op_data->op_mea1))) {
2757                 rc = lmv_striped_read_page(exp, op_data, cb_op, offset, ppage);
2758                 RETURN(rc);
2759         }
2760
2761         tgt = lmv_fid2tgt(lmv, &op_data->op_fid1);
2762         if (IS_ERR(tgt))
2763                 RETURN(PTR_ERR(tgt));
2764
2765         rc = md_read_page(tgt->ltd_exp, op_data, cb_op, offset, ppage);
2766
2767         RETURN(rc);
2768 }
2769
2770 /**
2771  * Unlink a file/directory
2772  *
2773  * Unlink a file or directory under the parent dir. The unlink request
2774  * usually will be sent to the MDT where the child is located, but if
2775  * the client does not have the child FID then request will be sent to the
2776  * MDT where the parent is located.
2777  *
2778  * If the parent is a striped directory then it also needs to locate which
2779  * stripe the name of the child is located, and replace the parent FID
2780  * (@op->op_fid1) with the stripe FID. Note: if the stripe is unknown,
2781  * it will walk through all of sub-stripes until the child is being
2782  * unlinked finally.
2783  *
2784  * \param[in] exp       export refer to LMV
2785  * \param[in] op_data   different parameters transferred beween client
2786  *                      MD stacks, name, namelen, FIDs etc.
2787  *                      op_fid1 is the parent FID, op_fid2 is the child
2788  *                      FID.
2789  * \param[out] request  point to the request of unlink.
2790  *
2791  * retval               0 if succeed
2792  *                      negative errno if failed.
2793  */
2794 static int lmv_unlink(struct obd_export *exp, struct md_op_data *op_data,
2795                       struct ptlrpc_request **request)
2796 {
2797         struct obd_device *obd = exp->exp_obd;
2798         struct lmv_obd *lmv = &obd->u.lmv;
2799         struct lmv_tgt_desc *tgt;
2800         struct lmv_tgt_desc *parent_tgt;
2801         struct mdt_body *body;
2802         int rc;
2803
2804         ENTRY;
2805
2806         op_data->op_fsuid = from_kuid(&init_user_ns, current_fsuid());
2807         op_data->op_fsgid = from_kgid(&init_user_ns, current_fsgid());
2808         op_data->op_cap = cfs_curproc_cap_pack();
2809
2810 retry:
2811         parent_tgt = lmv_locate_tgt(lmv, op_data);
2812         if (IS_ERR(parent_tgt))
2813                 RETURN(PTR_ERR(parent_tgt));
2814
2815         if (likely(!fid_is_zero(&op_data->op_fid2))) {
2816                 tgt = lmv_fid2tgt(lmv, &op_data->op_fid2);
2817                 if (IS_ERR(tgt))
2818                         RETURN(PTR_ERR(tgt));
2819         } else {
2820                 tgt = parent_tgt;
2821         }
2822
2823         /*
2824          * If child's fid is given, cancel unused locks for it if it is from
2825          * another export than parent.
2826          *
2827          * LOOKUP lock for child (fid3) should also be cancelled on parent
2828          * tgt_tgt in mdc_unlink().
2829          */
2830         op_data->op_flags |= MF_MDC_CANCEL_FID1 | MF_MDC_CANCEL_FID3;
2831
2832         if (parent_tgt != tgt)
2833                 rc = lmv_early_cancel(exp, parent_tgt, op_data, tgt->ltd_index,
2834                                       LCK_EX, MDS_INODELOCK_LOOKUP,
2835                                       MF_MDC_CANCEL_FID3);
2836
2837         rc = lmv_early_cancel(exp, NULL, op_data, tgt->ltd_index, LCK_EX,
2838                               MDS_INODELOCK_ELC, MF_MDC_CANCEL_FID3);
2839         if (rc)
2840                 RETURN(rc);
2841
2842         CDEBUG(D_INODE, "unlink with fid="DFID"/"DFID" -> mds #%u\n",
2843                PFID(&op_data->op_fid1), PFID(&op_data->op_fid2),
2844                tgt->ltd_index);
2845
2846         rc = md_unlink(tgt->ltd_exp, op_data, request);
2847         if (rc == -ENOENT && lmv_dir_retry_check_update(op_data)) {
2848                 ptlrpc_req_finished(*request);
2849                 *request = NULL;
2850                 goto retry;
2851         }
2852
2853         if (rc != -EREMOTE)
2854                 RETURN(rc);
2855
2856         body = req_capsule_server_get(&(*request)->rq_pill, &RMF_MDT_BODY);
2857         if (body == NULL)
2858                 RETURN(-EPROTO);
2859
2860         /* Not cross-ref case, just get out of here. */
2861         if (likely(!(body->mbo_valid & OBD_MD_MDS)))
2862                 RETURN(rc);
2863
2864         /* This is a remote object, try remote MDT. */
2865         op_data->op_fid2 = body->mbo_fid1;
2866         ptlrpc_req_finished(*request);
2867         *request = NULL;
2868
2869         tgt = lmv_fid2tgt(lmv, &op_data->op_fid2);
2870         if (IS_ERR(tgt))
2871                 RETURN(PTR_ERR(tgt));
2872
2873         goto retry;
2874 }
2875
2876 static int lmv_precleanup(struct obd_device *obd)
2877 {
2878         ENTRY;
2879         libcfs_kkuc_group_rem(&obd->obd_uuid, 0, KUC_GRP_HSM);
2880         fld_client_debugfs_fini(&obd->u.lmv.lmv_fld);
2881         lprocfs_obd_cleanup(obd);
2882         lprocfs_free_md_stats(obd);
2883         RETURN(0);
2884 }
2885
2886 /**
2887  * Get by key a value associated with a LMV device.
2888  *
2889  * Dispatch request to lower-layer devices as needed.
2890  *
2891  * \param[in] env               execution environment for this thread
2892  * \param[in] exp               export for the LMV device
2893  * \param[in] keylen            length of key identifier
2894  * \param[in] key               identifier of key to get value for
2895  * \param[in] vallen            size of \a val
2896  * \param[out] val              pointer to storage location for value
2897  * \param[in] lsm               optional striping metadata of object
2898  *
2899  * \retval 0            on success
2900  * \retval negative     negated errno on failure
2901  */
2902 static int lmv_get_info(const struct lu_env *env, struct obd_export *exp,
2903                         __u32 keylen, void *key, __u32 *vallen, void *val)
2904 {
2905         struct obd_device *obd;
2906         struct lmv_obd *lmv;
2907         struct lu_tgt_desc *tgt;
2908         int rc = 0;
2909
2910         ENTRY;
2911
2912         obd = class_exp2obd(exp);
2913         if (obd == NULL) {
2914                 CDEBUG(D_IOCTL, "Invalid client cookie %#llx\n",
2915                        exp->exp_handle.h_cookie);
2916                 RETURN(-EINVAL);
2917         }
2918
2919         lmv = &obd->u.lmv;
2920         if (keylen >= strlen("remote_flag") && !strcmp(key, "remote_flag")) {
2921                 LASSERT(*vallen == sizeof(__u32));
2922                 lmv_foreach_connected_tgt(lmv, tgt) {
2923                         if (!obd_get_info(env, tgt->ltd_exp, keylen, key,
2924                                           vallen, val))
2925                                 RETURN(0);
2926                 }
2927                 RETURN(-EINVAL);
2928         } else if (KEY_IS(KEY_MAX_EASIZE) ||
2929                    KEY_IS(KEY_DEFAULT_EASIZE) ||
2930                    KEY_IS(KEY_CONN_DATA)) {
2931                 /*
2932                  * Forwarding this request to first MDS, it should know LOV
2933                  * desc.
2934                  */
2935                 tgt = lmv_tgt(lmv, 0);
2936                 if (!tgt)
2937                         RETURN(-ENODEV);
2938
2939                 rc = obd_get_info(env, tgt->ltd_exp, keylen, key, vallen, val);
2940                 if (!rc && KEY_IS(KEY_CONN_DATA))
2941                         exp->exp_connect_data = *(struct obd_connect_data *)val;
2942                 RETURN(rc);
2943         } else if (KEY_IS(KEY_TGT_COUNT)) {
2944                 *((int *)val) = lmv->lmv_mdt_descs.ltd_lmv_desc.ld_tgt_count;
2945                 RETURN(0);
2946         }
2947
2948         CDEBUG(D_IOCTL, "Invalid key\n");
2949         RETURN(-EINVAL);
2950 }
2951
2952 static int lmv_rmfid(struct obd_export *exp, struct fid_array *fa,
2953                      int *__rcs, struct ptlrpc_request_set *_set)
2954 {
2955         struct obd_device *obd = class_exp2obd(exp);
2956         struct ptlrpc_request_set *set = _set;
2957         struct lmv_obd *lmv = &obd->u.lmv;
2958         int tgt_count = lmv->lmv_mdt_count;
2959         struct lu_tgt_desc *tgt;
2960         struct fid_array *fat, **fas = NULL;
2961         int i, rc, **rcs = NULL;
2962
2963         if (!set) {
2964                 set = ptlrpc_prep_set();
2965                 if (!set)
2966                         RETURN(-ENOMEM);
2967         }
2968
2969         /* split FIDs by targets */
2970         OBD_ALLOC_PTR_ARRAY(fas, tgt_count);
2971         if (fas == NULL)
2972                 GOTO(out, rc = -ENOMEM);
2973         OBD_ALLOC_PTR_ARRAY(rcs, tgt_count);
2974         if (rcs == NULL)
2975                 GOTO(out_fas, rc = -ENOMEM);
2976
2977         for (i = 0; i < fa->fa_nr; i++) {
2978                 unsigned int idx;
2979
2980                 rc = lmv_fld_lookup(lmv, &fa->fa_fids[i], &idx);
2981                 if (rc) {
2982                         CDEBUG(D_OTHER, "can't lookup "DFID": rc = %d\n",
2983                                PFID(&fa->fa_fids[i]), rc);
2984                         continue;
2985                 }
2986                 LASSERT(idx < tgt_count);
2987                 if (!fas[idx])
2988                         OBD_ALLOC(fas[idx], offsetof(struct fid_array,
2989                                   fa_fids[fa->fa_nr]));
2990                 if (!fas[idx])
2991                         GOTO(out, rc = -ENOMEM);
2992                 if (!rcs[idx])
2993                         OBD_ALLOC_PTR_ARRAY(rcs[idx], fa->fa_nr);
2994                 if (!rcs[idx])
2995                         GOTO(out, rc = -ENOMEM);
2996
2997                 fat = fas[idx];
2998                 fat->fa_fids[fat->fa_nr++] = fa->fa_fids[i];
2999         }
3000
3001         lmv_foreach_connected_tgt(lmv, tgt) {
3002                 fat = fas[tgt->ltd_index];
3003                 if (!fat || fat->fa_nr == 0)
3004                         continue;
3005                 rc = md_rmfid(tgt->ltd_exp, fat, rcs[tgt->ltd_index], set);
3006         }
3007
3008         rc = ptlrpc_set_wait(NULL, set);
3009         if (rc == 0) {
3010                 int j = 0;
3011                 for (i = 0; i < tgt_count; i++) {
3012                         fat = fas[i];
3013                         if (!fat || fat->fa_nr == 0)
3014                                 continue;
3015                         /* copy FIDs back */
3016                         memcpy(fa->fa_fids + j, fat->fa_fids,
3017                                fat->fa_nr * sizeof(struct lu_fid));
3018                         /* copy rcs back */
3019                         memcpy(__rcs + j, rcs[i], fat->fa_nr * sizeof(**rcs));
3020                         j += fat->fa_nr;
3021                 }
3022         }
3023         if (set != _set)
3024                 ptlrpc_set_destroy(set);
3025
3026 out:
3027         for (i = 0; i < tgt_count; i++) {
3028                 if (fas && fas[i])
3029                         OBD_FREE(fas[i], offsetof(struct fid_array,
3030                                                 fa_fids[fa->fa_nr]));
3031                 if (rcs && rcs[i])
3032                         OBD_FREE_PTR_ARRAY(rcs[i], fa->fa_nr);
3033         }
3034         if (rcs)
3035                 OBD_FREE_PTR_ARRAY(rcs, tgt_count);
3036 out_fas:
3037         if (fas)
3038                 OBD_FREE_PTR_ARRAY(fas, tgt_count);
3039
3040         RETURN(rc);
3041 }
3042
3043 /**
3044  * Asynchronously set by key a value associated with a LMV device.
3045  *
3046  * Dispatch request to lower-layer devices as needed.
3047  *
3048  * \param[in] env       execution environment for this thread
3049  * \param[in] exp       export for the LMV device
3050  * \param[in] keylen    length of key identifier
3051  * \param[in] key       identifier of key to store value for
3052  * \param[in] vallen    size of value to store
3053  * \param[in] val       pointer to data to be stored
3054  * \param[in] set       optional list of related ptlrpc requests
3055  *
3056  * \retval 0            on success
3057  * \retval negative     negated errno on failure
3058  */
3059 int lmv_set_info_async(const struct lu_env *env, struct obd_export *exp,
3060                         __u32 keylen, void *key, __u32 vallen, void *val,
3061                         struct ptlrpc_request_set *set)
3062 {
3063         struct lmv_tgt_desc     *tgt = NULL;
3064         struct obd_device       *obd;
3065         struct lmv_obd          *lmv;
3066         int rc = 0;
3067         ENTRY;
3068
3069         obd = class_exp2obd(exp);
3070         if (obd == NULL) {
3071                 CDEBUG(D_IOCTL, "Invalid client cookie %#llx\n",
3072                        exp->exp_handle.h_cookie);
3073                 RETURN(-EINVAL);
3074         }
3075         lmv = &obd->u.lmv;
3076
3077         if (KEY_IS(KEY_READ_ONLY) || KEY_IS(KEY_FLUSH_CTX) ||
3078             KEY_IS(KEY_DEFAULT_EASIZE)) {
3079                 int err = 0;
3080
3081                 lmv_foreach_connected_tgt(lmv, tgt) {
3082                         err = obd_set_info_async(env, tgt->ltd_exp,
3083                                                  keylen, key, vallen, val, set);
3084                         if (err && rc == 0)
3085                                 rc = err;
3086                 }
3087
3088                 RETURN(rc);
3089         }
3090
3091         RETURN(-EINVAL);
3092 }
3093
3094 static int lmv_unpack_md_v1(struct obd_export *exp, struct lmv_stripe_md *lsm,
3095                             const struct lmv_mds_md_v1 *lmm1)
3096 {
3097         struct lmv_obd  *lmv = &exp->exp_obd->u.lmv;
3098         int             stripe_count;
3099         int             cplen;
3100         int             i;
3101         int             rc = 0;
3102         ENTRY;
3103
3104         lsm->lsm_md_magic = le32_to_cpu(lmm1->lmv_magic);
3105         lsm->lsm_md_stripe_count = le32_to_cpu(lmm1->lmv_stripe_count);
3106         lsm->lsm_md_master_mdt_index = le32_to_cpu(lmm1->lmv_master_mdt_index);
3107         if (OBD_FAIL_CHECK(OBD_FAIL_UNKNOWN_LMV_STRIPE))
3108                 lsm->lsm_md_hash_type = LMV_HASH_TYPE_UNKNOWN;
3109         else
3110                 lsm->lsm_md_hash_type = le32_to_cpu(lmm1->lmv_hash_type);
3111         lsm->lsm_md_layout_version = le32_to_cpu(lmm1->lmv_layout_version);
3112         lsm->lsm_md_migrate_offset = le32_to_cpu(lmm1->lmv_migrate_offset);
3113         lsm->lsm_md_migrate_hash = le32_to_cpu(lmm1->lmv_migrate_hash);
3114         cplen = strlcpy(lsm->lsm_md_pool_name, lmm1->lmv_pool_name,
3115                         sizeof(lsm->lsm_md_pool_name));
3116
3117         if (cplen >= sizeof(lsm->lsm_md_pool_name))
3118                 RETURN(-E2BIG);
3119
3120         CDEBUG(D_INFO, "unpack lsm count %d/%d, master %d hash_type %#x/%#x "
3121                "layout_version %d\n", lsm->lsm_md_stripe_count,
3122                lsm->lsm_md_migrate_offset, lsm->lsm_md_master_mdt_index,
3123                lsm->lsm_md_hash_type, lsm->lsm_md_migrate_hash,
3124                lsm->lsm_md_layout_version);
3125
3126         stripe_count = le32_to_cpu(lmm1->lmv_stripe_count);
3127         for (i = 0; i < stripe_count; i++) {
3128                 fid_le_to_cpu(&lsm->lsm_md_oinfo[i].lmo_fid,
3129                               &lmm1->lmv_stripe_fids[i]);
3130                 /*
3131                  * set default value -1, so lmv_locate_tgt() knows this stripe
3132                  * target is not initialized.
3133                  */
3134                 lsm->lsm_md_oinfo[i].lmo_mds = LMV_OFFSET_DEFAULT;
3135                 if (!fid_is_sane(&lsm->lsm_md_oinfo[i].lmo_fid))
3136                         continue;
3137
3138                 rc = lmv_fld_lookup(lmv, &lsm->lsm_md_oinfo[i].lmo_fid,
3139                                     &lsm->lsm_md_oinfo[i].lmo_mds);
3140                 if (rc == -ENOENT)
3141                         continue;
3142
3143                 if (rc)
3144                         RETURN(rc);
3145
3146                 CDEBUG(D_INFO, "unpack fid #%d "DFID"\n", i,
3147                        PFID(&lsm->lsm_md_oinfo[i].lmo_fid));
3148         }
3149
3150         RETURN(rc);
3151 }
3152
3153 static inline int lmv_unpack_user_md(struct obd_export *exp,
3154                                      struct lmv_stripe_md *lsm,
3155                                      const struct lmv_user_md *lmu)
3156 {
3157         lsm->lsm_md_magic = le32_to_cpu(lmu->lum_magic);
3158         lsm->lsm_md_stripe_count = le32_to_cpu(lmu->lum_stripe_count);
3159         lsm->lsm_md_master_mdt_index = le32_to_cpu(lmu->lum_stripe_offset);
3160         lsm->lsm_md_hash_type = le32_to_cpu(lmu->lum_hash_type);
3161         lsm->lsm_md_pool_name[LOV_MAXPOOLNAME] = 0;
3162
3163         return 0;
3164 }
3165
3166 static int lmv_unpackmd(struct obd_export *exp, struct lmv_stripe_md **lsmp,
3167                         const union lmv_mds_md *lmm, size_t lmm_size)
3168 {
3169         struct lmv_stripe_md     *lsm;
3170         int                      lsm_size;
3171         int                      rc;
3172         bool                     allocated = false;
3173         ENTRY;
3174
3175         LASSERT(lsmp != NULL);
3176
3177         lsm = *lsmp;
3178         /* Free memmd */
3179         if (lsm != NULL && lmm == NULL) {
3180                 int i;
3181                 struct lmv_foreign_md *lfm = (struct lmv_foreign_md *)lsm;
3182
3183                 if (lfm->lfm_magic == LMV_MAGIC_FOREIGN) {
3184                         size_t lfm_size;
3185
3186                         lfm_size = lfm->lfm_length + offsetof(typeof(*lfm),
3187                                                               lfm_value[0]);
3188                         OBD_FREE_LARGE(lfm, lfm_size);
3189                         RETURN(0);
3190                 }
3191
3192                 if (lmv_dir_striped(lsm)) {
3193                         for (i = 0; i < lsm->lsm_md_stripe_count; i++) {
3194                                 if (lsm->lsm_md_oinfo[i].lmo_root)
3195                                         iput(lsm->lsm_md_oinfo[i].lmo_root);
3196                         }
3197                         lsm_size = lmv_stripe_md_size(lsm->lsm_md_stripe_count);
3198                 } else {
3199                         lsm_size = lmv_stripe_md_size(0);
3200                 }
3201                 OBD_FREE(lsm, lsm_size);
3202                 *lsmp = NULL;
3203                 RETURN(0);
3204         }
3205
3206         /* foreign lmv case */
3207         if (le32_to_cpu(lmm->lmv_magic) == LMV_MAGIC_FOREIGN) {
3208                 struct lmv_foreign_md *lfm = (struct lmv_foreign_md *)lsm;
3209
3210                 if (lfm == NULL) {
3211                         OBD_ALLOC_LARGE(lfm, lmm_size);
3212                         if (lfm == NULL)
3213                                 RETURN(-ENOMEM);
3214                         *lsmp = (struct lmv_stripe_md *)lfm;
3215                 }
3216                 lfm->lfm_magic = le32_to_cpu(lmm->lmv_foreign_md.lfm_magic);
3217                 lfm->lfm_length = le32_to_cpu(lmm->lmv_foreign_md.lfm_length);
3218                 lfm->lfm_type = le32_to_cpu(lmm->lmv_foreign_md.lfm_type);
3219                 lfm->lfm_flags = le32_to_cpu(lmm->lmv_foreign_md.lfm_flags);
3220                 memcpy(&lfm->lfm_value, &lmm->lmv_foreign_md.lfm_value,
3221                        lfm->lfm_length);
3222                 RETURN(lmm_size);
3223         }
3224
3225         if (le32_to_cpu(lmm->lmv_magic) == LMV_MAGIC_STRIPE)
3226                 RETURN(-EPERM);
3227
3228         /* Unpack memmd */
3229         if (le32_to_cpu(lmm->lmv_magic) != LMV_MAGIC_V1 &&
3230             le32_to_cpu(lmm->lmv_magic) != LMV_USER_MAGIC) {
3231                 CERROR("%s: invalid lmv magic %x: rc = %d\n",
3232                        exp->exp_obd->obd_name, le32_to_cpu(lmm->lmv_magic),
3233                        -EIO);
3234                 RETURN(-EIO);
3235         }
3236
3237         if (le32_to_cpu(lmm->lmv_magic) == LMV_MAGIC_V1)
3238                 lsm_size = lmv_stripe_md_size(lmv_mds_md_stripe_count_get(lmm));
3239         else
3240                 /**
3241                  * Unpack default dirstripe(lmv_user_md) to lmv_stripe_md,
3242                  * stripecount should be 0 then.
3243                  */
3244                 lsm_size = lmv_stripe_md_size(0);
3245
3246         if (lsm == NULL) {
3247                 OBD_ALLOC(lsm, lsm_size);
3248                 if (lsm == NULL)
3249                         RETURN(-ENOMEM);
3250                 allocated = true;
3251                 *lsmp = lsm;
3252         }
3253
3254         switch (le32_to_cpu(lmm->lmv_magic)) {
3255         case LMV_MAGIC_V1:
3256                 rc = lmv_unpack_md_v1(exp, lsm, &lmm->lmv_md_v1);
3257                 break;
3258         case LMV_USER_MAGIC:
3259                 rc = lmv_unpack_user_md(exp, lsm, &lmm->lmv_user_md);
3260                 break;
3261         default:
3262                 CERROR("%s: unrecognized magic %x\n", exp->exp_obd->obd_name,
3263                        le32_to_cpu(lmm->lmv_magic));
3264                 rc = -EINVAL;
3265                 break;
3266         }
3267
3268         if (rc != 0 && allocated) {
3269                 OBD_FREE(lsm, lsm_size);
3270                 *lsmp = NULL;
3271                 lsm_size = rc;
3272         }
3273         RETURN(lsm_size);
3274 }
3275
3276 void lmv_free_memmd(struct lmv_stripe_md *lsm)
3277 {
3278         lmv_unpackmd(NULL, &lsm, NULL, 0);
3279 }
3280 EXPORT_SYMBOL(lmv_free_memmd);
3281
3282 static int lmv_cancel_unused(struct obd_export *exp, const struct lu_fid *fid,
3283                              union ldlm_policy_data *policy,
3284                              enum ldlm_mode mode, enum ldlm_cancel_flags flags,
3285                              void *opaque)
3286 {
3287         struct lmv_obd *lmv = &exp->exp_obd->u.lmv;
3288         struct lu_tgt_desc *tgt;
3289         int err;
3290         int rc = 0;
3291
3292         ENTRY;
3293
3294         LASSERT(fid != NULL);
3295
3296         lmv_foreach_connected_tgt(lmv, tgt) {
3297                 if (!tgt->ltd_active)
3298                         continue;
3299
3300                 err = md_cancel_unused(tgt->ltd_exp, fid, policy, mode, flags,
3301                                        opaque);
3302                 if (!rc)
3303                         rc = err;
3304         }
3305         RETURN(rc);
3306 }
3307
3308 static int lmv_set_lock_data(struct obd_export *exp,
3309                              const struct lustre_handle *lockh,
3310                              void *data, __u64 *bits)
3311 {
3312         struct lmv_obd *lmv = &exp->exp_obd->u.lmv;
3313         struct lmv_tgt_desc *tgt = lmv_tgt(lmv, 0);
3314         int rc;
3315
3316         ENTRY;
3317
3318         if (tgt == NULL || tgt->ltd_exp == NULL)
3319                 RETURN(-EINVAL);
3320         rc =  md_set_lock_data(tgt->ltd_exp, lockh, data, bits);
3321         RETURN(rc);
3322 }
3323
3324 enum ldlm_mode lmv_lock_match(struct obd_export *exp, __u64 flags,
3325                               const struct lu_fid *fid, enum ldlm_type type,
3326                               union ldlm_policy_data *policy,
3327                               enum ldlm_mode mode, struct lustre_handle *lockh)
3328 {
3329         struct obd_device *obd = exp->exp_obd;
3330         struct lmv_obd *lmv = &obd->u.lmv;
3331         enum ldlm_mode rc;
3332         struct lu_tgt_desc *tgt;
3333         int i;
3334         int index;
3335
3336         ENTRY;
3337
3338         CDEBUG(D_INODE, "Lock match for "DFID"\n", PFID(fid));
3339
3340         /*
3341          * With DNE every object can have two locks in different namespaces:
3342          * lookup lock in space of MDT storing direntry and update/open lock in
3343          * space of MDT storing inode.  Try the MDT that the FID maps to first,
3344          * since this can be easily found, and only try others if that fails.
3345          */
3346         for (i = 0, index = lmv_fid2tgt_index(lmv, fid);
3347              i < lmv->lmv_mdt_descs.ltd_tgts_size;
3348              i++, index = (index + 1) % lmv->lmv_mdt_descs.ltd_tgts_size) {
3349                 if (index < 0) {
3350                         CDEBUG(D_HA, "%s: "DFID" is inaccessible: rc = %d\n",
3351                                obd->obd_name, PFID(fid), index);
3352                         index = 0;
3353                 }
3354
3355                 tgt = lmv_tgt(lmv, index);
3356                 if (!tgt || !tgt->ltd_exp || !tgt->ltd_active)
3357                         continue;
3358
3359                 rc = md_lock_match(tgt->ltd_exp, flags, fid, type, policy, mode,
3360                                    lockh);
3361                 if (rc)
3362                         RETURN(rc);
3363         }
3364
3365         RETURN(0);
3366 }
3367
3368 int lmv_get_lustre_md(struct obd_export *exp, struct ptlrpc_request *req,
3369                       struct obd_export *dt_exp, struct obd_export *md_exp,
3370                       struct lustre_md *md)
3371 {
3372         struct lmv_obd *lmv = &exp->exp_obd->u.lmv;
3373         struct lmv_tgt_desc *tgt = lmv_tgt(lmv, 0);
3374
3375         if (!tgt || !tgt->ltd_exp)
3376                 return -EINVAL;
3377
3378         return md_get_lustre_md(tgt->ltd_exp, req, dt_exp, md_exp, md);
3379 }
3380
3381 int lmv_free_lustre_md(struct obd_export *exp, struct lustre_md *md)
3382 {
3383         struct obd_device *obd = exp->exp_obd;
3384         struct lmv_obd *lmv = &obd->u.lmv;
3385         struct lmv_tgt_desc *tgt = lmv_tgt(lmv, 0);
3386
3387         ENTRY;
3388
3389         if (md->default_lmv) {
3390                 lmv_free_memmd(md->default_lmv);
3391                 md->default_lmv = NULL;
3392         }
3393         if (md->lmv != NULL) {
3394                 lmv_free_memmd(md->lmv);
3395                 md->lmv = NULL;
3396         }
3397         if (!tgt || !tgt->ltd_exp)
3398                 RETURN(-EINVAL);
3399         RETURN(md_free_lustre_md(tgt->ltd_exp, md));
3400 }
3401
3402 int lmv_set_open_replay_data(struct obd_export *exp,
3403                              struct obd_client_handle *och,
3404                              struct lookup_intent *it)
3405 {
3406         struct obd_device *obd = exp->exp_obd;
3407         struct lmv_obd *lmv = &obd->u.lmv;
3408         struct lmv_tgt_desc *tgt;
3409
3410         ENTRY;
3411
3412         tgt = lmv_fid2tgt(lmv, &och->och_fid);
3413         if (IS_ERR(tgt))
3414                 RETURN(PTR_ERR(tgt));
3415
3416         RETURN(md_set_open_replay_data(tgt->ltd_exp, och, it));
3417 }
3418
3419 int lmv_clear_open_replay_data(struct obd_export *exp,
3420                                struct obd_client_handle *och)
3421 {
3422         struct obd_device *obd = exp->exp_obd;
3423         struct lmv_obd *lmv = &obd->u.lmv;
3424         struct lmv_tgt_desc *tgt;
3425
3426         ENTRY;
3427
3428         tgt = lmv_fid2tgt(lmv, &och->och_fid);
3429         if (IS_ERR(tgt))
3430                 RETURN(PTR_ERR(tgt));
3431
3432         RETURN(md_clear_open_replay_data(tgt->ltd_exp, och));
3433 }
3434
3435 int lmv_intent_getattr_async(struct obd_export *exp,
3436                              struct md_enqueue_info *minfo)
3437 {
3438         struct md_op_data *op_data = &minfo->mi_data;
3439         struct obd_device *obd = exp->exp_obd;
3440         struct lmv_obd *lmv = &obd->u.lmv;
3441         struct lmv_tgt_desc *ptgt;
3442         struct lmv_tgt_desc *ctgt;
3443         int rc;
3444
3445         ENTRY;
3446
3447         if (!fid_is_sane(&op_data->op_fid2))
3448                 RETURN(-EINVAL);
3449
3450         ptgt = lmv_locate_tgt(lmv, op_data);
3451         if (IS_ERR(ptgt))
3452                 RETURN(PTR_ERR(ptgt));
3453
3454         ctgt = lmv_fid2tgt(lmv, &op_data->op_fid2);
3455         if (IS_ERR(ctgt))
3456                 RETURN(PTR_ERR(ctgt));
3457
3458         /*
3459          * remote object needs two RPCs to lookup and getattr, considering the
3460          * complexity don't support statahead for now.
3461          */
3462         if (ctgt != ptgt)
3463                 RETURN(-EREMOTE);
3464
3465         rc = md_intent_getattr_async(ptgt->ltd_exp, minfo);
3466
3467         RETURN(rc);
3468 }
3469
3470 int lmv_revalidate_lock(struct obd_export *exp, struct lookup_intent *it,
3471                         struct lu_fid *fid, __u64 *bits)
3472 {
3473         struct obd_device *obd = exp->exp_obd;
3474         struct lmv_obd *lmv = &obd->u.lmv;
3475         struct lmv_tgt_desc *tgt;
3476         int rc;
3477
3478         ENTRY;
3479
3480         tgt = lmv_fid2tgt(lmv, fid);
3481         if (IS_ERR(tgt))
3482                 RETURN(PTR_ERR(tgt));
3483
3484         rc = md_revalidate_lock(tgt->ltd_exp, it, fid, bits);
3485         RETURN(rc);
3486 }
3487
3488 int lmv_get_fid_from_lsm(struct obd_export *exp,
3489                          const struct lmv_stripe_md *lsm,
3490                          const char *name, int namelen, struct lu_fid *fid)
3491 {
3492         const struct lmv_oinfo *oinfo;
3493
3494         LASSERT(lmv_dir_striped(lsm));
3495
3496         oinfo = lsm_name_to_stripe_info(lsm, name, namelen, false);
3497         if (IS_ERR(oinfo))
3498                 return PTR_ERR(oinfo);
3499
3500         *fid = oinfo->lmo_fid;
3501
3502         RETURN(0);
3503 }
3504
3505 /**
3506  * For lmv, only need to send request to master MDT, and the master MDT will
3507  * process with other slave MDTs. The only exception is Q_GETOQUOTA for which
3508  * we directly fetch data from the slave MDTs.
3509  */
3510 int lmv_quotactl(struct obd_device *unused, struct obd_export *exp,
3511                  struct obd_quotactl *oqctl)
3512 {
3513         struct obd_device *obd = class_exp2obd(exp);
3514         struct lmv_obd *lmv = &obd->u.lmv;
3515         struct lmv_tgt_desc *tgt = lmv_tgt(lmv, 0);
3516         __u64 curspace, curinodes;
3517         int rc = 0;
3518
3519         ENTRY;
3520
3521         if (!tgt || !tgt->ltd_exp || !tgt->ltd_active) {
3522                 CERROR("master lmv inactive\n");
3523                 RETURN(-EIO);
3524         }
3525
3526         if (oqctl->qc_cmd != Q_GETOQUOTA) {
3527                 rc = obd_quotactl(tgt->ltd_exp, oqctl);
3528                 RETURN(rc);
3529         }
3530
3531         curspace = curinodes = 0;
3532         lmv_foreach_connected_tgt(lmv, tgt) {
3533                 int err;
3534
3535                 if (!tgt->ltd_active)
3536                         continue;
3537
3538                 err = obd_quotactl(tgt->ltd_exp, oqctl);
3539                 if (err) {
3540                         CERROR("getquota on mdt %d failed. %d\n",
3541                                tgt->ltd_index, err);
3542                         if (!rc)
3543                                 rc = err;
3544                 } else {
3545                         curspace += oqctl->qc_dqblk.dqb_curspace;
3546                         curinodes += oqctl->qc_dqblk.dqb_curinodes;
3547                 }
3548         }
3549         oqctl->qc_dqblk.dqb_curspace = curspace;
3550         oqctl->qc_dqblk.dqb_curinodes = curinodes;
3551
3552         RETURN(rc);
3553 }
3554
3555 static int lmv_merge_attr(struct obd_export *exp,
3556                           const struct lu_fid *fid,
3557                           const struct lmv_stripe_md *lsm,
3558                           struct cl_attr *attr,
3559                           ldlm_blocking_callback cb_blocking)
3560 {
3561         int rc;
3562         int i;
3563
3564         if (!lmv_dir_striped(lsm))
3565                 return 0;
3566
3567         rc = lmv_revalidate_slaves(exp, fid, lsm, cb_blocking, 0);
3568         if (rc < 0)
3569                 return rc;
3570
3571         for (i = 0; i < lsm->lsm_md_stripe_count; i++) {
3572                 struct inode *inode = lsm->lsm_md_oinfo[i].lmo_root;
3573
3574                 if (!inode)
3575                         continue;
3576
3577                 CDEBUG(D_INFO,
3578                        "" DFID " size %llu, blocks %llu nlink %u, atime %lld ctime %lld, mtime %lld.\n",
3579                        PFID(&lsm->lsm_md_oinfo[i].lmo_fid),
3580                        i_size_read(inode), (unsigned long long)inode->i_blocks,
3581                        inode->i_nlink, (s64)inode->i_atime.tv_sec,
3582                        (s64)inode->i_ctime.tv_sec, (s64)inode->i_mtime.tv_sec);
3583
3584                 /* for slave stripe, it needs to subtract nlink for . and .. */
3585                 if (i != 0)
3586                         attr->cat_nlink += inode->i_nlink - 2;
3587                 else
3588                         attr->cat_nlink = inode->i_nlink;
3589
3590                 attr->cat_size += i_size_read(inode);
3591                 attr->cat_blocks += inode->i_blocks;
3592
3593                 if (attr->cat_atime < inode->i_atime.tv_sec)
3594                         attr->cat_atime = inode->i_atime.tv_sec;
3595
3596                 if (attr->cat_ctime < inode->i_ctime.tv_sec)
3597                         attr->cat_ctime = inode->i_ctime.tv_sec;
3598
3599                 if (attr->cat_mtime < inode->i_mtime.tv_sec)
3600                         attr->cat_mtime = inode->i_mtime.tv_sec;
3601         }
3602         return 0;
3603 }
3604
3605 static const struct obd_ops lmv_obd_ops = {
3606         .o_owner                = THIS_MODULE,
3607         .o_setup                = lmv_setup,
3608         .o_cleanup              = lmv_cleanup,
3609         .o_precleanup           = lmv_precleanup,
3610         .o_process_config       = lmv_process_config,
3611         .o_connect              = lmv_connect,
3612         .o_disconnect           = lmv_disconnect,
3613         .o_statfs               = lmv_statfs,
3614         .o_get_info             = lmv_get_info,
3615         .o_set_info_async       = lmv_set_info_async,
3616         .o_notify               = lmv_notify,
3617         .o_get_uuid             = lmv_get_uuid,
3618         .o_fid_alloc            = lmv_fid_alloc,
3619         .o_iocontrol            = lmv_iocontrol,
3620         .o_quotactl             = lmv_quotactl
3621 };
3622
3623 static const struct md_ops lmv_md_ops = {
3624         .m_get_root             = lmv_get_root,
3625         .m_null_inode           = lmv_null_inode,
3626         .m_close                = lmv_close,
3627         .m_create               = lmv_create,
3628         .m_enqueue              = lmv_enqueue,
3629         .m_getattr              = lmv_getattr,
3630         .m_getxattr             = lmv_getxattr,
3631         .m_getattr_name         = lmv_getattr_name,
3632         .m_intent_lock          = lmv_intent_lock,
3633         .m_link                 = lmv_link,
3634         .m_rename               = lmv_rename,
3635         .m_setattr              = lmv_setattr,
3636         .m_setxattr             = lmv_setxattr,
3637         .m_fsync                = lmv_fsync,
3638         .m_file_resync          = lmv_file_resync,
3639         .m_read_page            = lmv_read_page,
3640         .m_unlink               = lmv_unlink,
3641         .m_init_ea_size         = lmv_init_ea_size,
3642         .m_cancel_unused        = lmv_cancel_unused,
3643         .m_set_lock_data        = lmv_set_lock_data,
3644         .m_lock_match           = lmv_lock_match,
3645         .m_get_lustre_md        = lmv_get_lustre_md,
3646         .m_free_lustre_md       = lmv_free_lustre_md,
3647         .m_merge_attr           = lmv_merge_attr,
3648         .m_set_open_replay_data = lmv_set_open_replay_data,
3649         .m_clear_open_replay_data = lmv_clear_open_replay_data,
3650         .m_intent_getattr_async = lmv_intent_getattr_async,
3651         .m_revalidate_lock      = lmv_revalidate_lock,
3652         .m_get_fid_from_lsm     = lmv_get_fid_from_lsm,
3653         .m_unpackmd             = lmv_unpackmd,
3654         .m_rmfid                = lmv_rmfid,
3655 };
3656
3657 static int __init lmv_init(void)
3658 {
3659         return class_register_type(&lmv_obd_ops, &lmv_md_ops, true, NULL,
3660                                    LUSTRE_LMV_NAME, NULL);
3661 }
3662
3663 static void __exit lmv_exit(void)
3664 {
3665         class_unregister_type(LUSTRE_LMV_NAME);
3666 }
3667
3668 MODULE_AUTHOR("OpenSFS, Inc. <http://www.lustre.org/>");
3669 MODULE_DESCRIPTION("Lustre Logical Metadata Volume");
3670 MODULE_VERSION(LUSTRE_VERSION_STRING);
3671 MODULE_LICENSE("GPL");
3672
3673 module_init(lmv_init);
3674 module_exit(lmv_exit);