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 #ifdef HAVE_UIDGID_HEADER
  40 # include <linux/uidgid.h>
  41 #endif
  42 #include <linux/slab.h>
  43 #include <linux/pagemap.h>
  44 #include <linux/mm.h>
  45 #include <linux/math64.h>
  46 #include <linux/seq_file.h>
  47 #include <linux/namei.h>
  48
  49 #include <obd_support.h>
  50 #include <lustre_lib.h>
  51 #include <lustre_net.h>
  52 #include <obd_class.h>
  53 #include <lustre_lmv.h>
  54 #include <lprocfs_status.h>
  55 #include <cl_object.h>
  56 #include <lustre_fid.h>
  57 #include <uapi/linux/lustre/lustre_ioctl.h>
  58 #include <lustre_kernelcomm.h>
  59 #include "lmv_internal.h"
  60
  61 static int lmv_check_connect(struct obd_device *obd);
  62
  63 void lmv_activate_target(struct lmv_obd *lmv, struct lmv_tgt_desc *tgt,
  64                          int activate)
  65 {
  66         if (tgt->ltd_active == activate)
  67                 return;
  68
  69         tgt->ltd_active = activate;
  70         lmv->desc.ld_active_tgt_count += (activate ? 1 : -1);
  71
  72         tgt->ltd_exp->exp_obd->obd_inactive = !activate;
  73 }
  74
  75 /**
  76  * Error codes:
  77  *
  78  *  -EINVAL  : UUID can't be found in the LMV's target list
  79  *  -ENOTCONN: The UUID is found, but the target connection is bad (!)
  80  *  -EBADF   : The UUID is found, but the OBD of the wrong type (!)
  81  */
  82 static int lmv_set_mdc_active(struct lmv_obd *lmv,
  83                               const struct obd_uuid *uuid,
  84                               int activate)
  85 {
  86         struct lu_tgt_desc *tgt = NULL;
  87         struct obd_device *obd;
  88         int rc = 0;
  89
  90         ENTRY;
  91
  92         CDEBUG(D_INFO, "Searching in lmv %p for uuid %s (activate=%d)\n",
  93                         lmv, uuid->uuid, activate);
  94
  95         spin_lock(&lmv->lmv_lock);
  96         lmv_foreach_connected_tgt(lmv, tgt) {
  97                 CDEBUG(D_INFO, "Target idx %d is %s conn %#llx\n",
  98                        tgt->ltd_index, tgt->ltd_uuid.uuid,
  99                        tgt->ltd_exp->exp_handle.h_cookie);
 100
 101                 if (obd_uuid_equals(uuid, &tgt->ltd_uuid))
 102                         break;
 103         }
 104
 105         if (!tgt)
 106                 GOTO(out_lmv_lock, rc = -EINVAL);
 107
 108         obd = class_exp2obd(tgt->ltd_exp);
 109         if (obd == NULL)
 110                 GOTO(out_lmv_lock, rc = -ENOTCONN);
 111
 112         CDEBUG(D_INFO, "Found OBD %s=%s device %d (%p) type %s at LMV idx %d\n",
 113                obd->obd_name, obd->obd_uuid.uuid, obd->obd_minor, obd,
 114                obd->obd_type->typ_name, tgt->ltd_index);
 115         LASSERT(strcmp(obd->obd_type->typ_name, LUSTRE_MDC_NAME) == 0);
 116
 117         if (tgt->ltd_active == activate) {
 118                 CDEBUG(D_INFO, "OBD %p already %sactive!\n", obd,
 119                        activate ? "" : "in");
 120                 GOTO(out_lmv_lock, rc);
 121         }
 122
 123         CDEBUG(D_INFO, "Marking OBD %p %sactive\n", obd,
 124                activate ? "" : "in");
 125         lmv_activate_target(lmv, tgt, activate);
 126         EXIT;
 127
 128  out_lmv_lock:
 129         spin_unlock(&lmv->lmv_lock);
 130         return rc;
 131 }
 132
 133 struct obd_uuid *lmv_get_uuid(struct obd_export *exp)
 134 {
 135         struct lmv_obd *lmv = &exp->exp_obd->u.lmv;
 136         struct lmv_tgt_desc *tgt = lmv_tgt(lmv, 0);
 137
 138         return (tgt == NULL) ? NULL : obd_get_uuid(tgt->ltd_exp);
 139 }
 140
 141 static int lmv_notify(struct obd_device *obd, struct obd_device *watched,
 142                       enum obd_notify_event ev)
 143 {
 144         struct obd_connect_data *conn_data;
 145         struct lmv_obd          *lmv = &obd->u.lmv;
 146         struct obd_uuid         *uuid;
 147         int                      rc = 0;
 148         ENTRY;
 149
 150         if (strcmp(watched->obd_type->typ_name, LUSTRE_MDC_NAME)) {
 151                 CERROR("unexpected notification of %s %s!\n",
 152                        watched->obd_type->typ_name,
 153                        watched->obd_name);
 154                 RETURN(-EINVAL);
 155         }
 156
 157         uuid = &watched->u.cli.cl_target_uuid;
 158         if (ev == OBD_NOTIFY_ACTIVE || ev == OBD_NOTIFY_INACTIVE) {
 159                 /*
 160                  * Set MDC as active before notifying the observer, so the
 161                  * observer can use the MDC normally.
 162                  */
 163                 rc = lmv_set_mdc_active(lmv, uuid,
 164                                         ev == OBD_NOTIFY_ACTIVE);
 165                 if (rc) {
 166                         CERROR("%sactivation of %s failed: %d\n",
 167                                ev == OBD_NOTIFY_ACTIVE ? "" : "de",
 168                                uuid->uuid, rc);
 169                         RETURN(rc);
 170                 }
 171         } else if (ev == OBD_NOTIFY_OCD) {
 172                 conn_data = &watched->u.cli.cl_import->imp_connect_data;
 173                 /*
 174                  * XXX: Make sure that ocd_connect_flags from all targets are
 175                  * the same. Otherwise one of MDTs runs wrong version or
 176                  * something like this.  --umka
 177                  */
 178                 obd->obd_self_export->exp_connect_data = *conn_data;
 179         }
 180
 181         /*
 182          * Pass the notification up the chain.
 183          */
 184         if (obd->obd_observer)
 185                 rc = obd_notify(obd->obd_observer, watched, ev);
 186
 187         RETURN(rc);
 188 }
 189
 190 static int lmv_connect(const struct lu_env *env,
 191                        struct obd_export **pexp, struct obd_device *obd,
 192                        struct obd_uuid *cluuid, struct obd_connect_data *data,
 193                        void *localdata)
 194 {
 195         struct lmv_obd *lmv = &obd->u.lmv;
 196         struct lustre_handle conn = { 0 };
 197         struct obd_export *exp;
 198         int rc;
 199         ENTRY;
 200
 201         rc = class_connect(&conn, obd, cluuid);
 202         if (rc) {
 203                 CERROR("class_connection() returned %d\n", rc);
 204                 RETURN(rc);
 205         }
 206
 207         exp = class_conn2export(&conn);
 208
 209         lmv->connected = 0;
 210         lmv->conn_data = *data;
 211         lmv->lmv_cache = localdata;
 212
 213         lmv->lmv_tgts_kobj = kobject_create_and_add("target_obds",
 214                                                     &obd->obd_kset.kobj);
 215         if (!lmv->lmv_tgts_kobj) {
 216                 CERROR("%s: cannot create /sys/fs/lustre/%s/%s/target_obds\n",
 217                        obd->obd_name, obd->obd_type->typ_name, obd->obd_name);
 218         }
 219
 220         rc = lmv_check_connect(obd);
 221         if (rc != 0)
 222                 GOTO(out_sysfs, rc);
 223
 224         *pexp = exp;
 225
 226         RETURN(rc);
 227
 228 out_sysfs:
 229         if (lmv->lmv_tgts_kobj)
 230                 kobject_put(lmv->lmv_tgts_kobj);
 231
 232         class_disconnect(exp);
 233
 234         return rc;
 235 }
 236
 237 static int lmv_init_ea_size(struct obd_export *exp, __u32 easize,
 238                             __u32 def_easize)
 239 {
 240         struct obd_device *obd = exp->exp_obd;
 241         struct lmv_obd *lmv = &obd->u.lmv;
 242         struct lmv_tgt_desc *tgt;
 243         int change = 0;
 244         int rc = 0;
 245
 246         ENTRY;
 247
 248         if (lmv->max_easize < easize) {
 249                 lmv->max_easize = easize;
 250                 change = 1;
 251         }
 252         if (lmv->max_def_easize < def_easize) {
 253                 lmv->max_def_easize = def_easize;
 254                 change = 1;
 255         }
 256
 257         if (change == 0)
 258                 RETURN(0);
 259
 260         if (lmv->connected == 0)
 261                 RETURN(0);
 262
 263         lmv_foreach_connected_tgt(lmv, tgt) {
 264                 if (!tgt->ltd_active)
 265                         continue;
 266
 267                 rc = md_init_ea_size(tgt->ltd_exp, easize, def_easize);
 268                 if (rc) {
 269                         CERROR("%s: obd_init_ea_size() failed on MDT target %d:"
 270                                " rc = %d\n", obd->obd_name, tgt->ltd_index, rc);
 271                         break;
 272                 }
 273         }
 274         RETURN(rc);
 275 }
 276
 277 #define MAX_STRING_SIZE 128
 278
 279 int lmv_connect_mdc(struct obd_device *obd, struct lmv_tgt_desc *tgt)
 280 {
 281         struct lmv_obd          *lmv = &obd->u.lmv;
 282         struct obd_device       *mdc_obd;
 283         struct obd_export       *mdc_exp;
 284         struct lu_fld_target     target;
 285         int                      rc;
 286         ENTRY;
 287
 288         mdc_obd = class_find_client_obd(&tgt->ltd_uuid, LUSTRE_MDC_NAME,
 289                                         &obd->obd_uuid);
 290         if (!mdc_obd) {
 291                 CERROR("target %s not attached\n", tgt->ltd_uuid.uuid);
 292                 RETURN(-EINVAL);
 293         }
 294
 295         CDEBUG(D_CONFIG, "connect to %s(%s) - %s, %s\n",
 296                mdc_obd->obd_name, mdc_obd->obd_uuid.uuid,
 297                tgt->ltd_uuid.uuid, obd->obd_uuid.uuid);
 298
 299         if (!mdc_obd->obd_set_up) {
 300                 CERROR("target %s is not set up\n", tgt->ltd_uuid.uuid);
 301                 RETURN(-EINVAL);
 302         }
 303
 304         rc = obd_connect(NULL, &mdc_exp, mdc_obd, &obd->obd_uuid,
 305                          &lmv->conn_data, lmv->lmv_cache);
 306         if (rc) {
 307                 CERROR("target %s connect error %d\n", tgt->ltd_uuid.uuid, rc);
 308                 RETURN(rc);
 309         }
 310
 311         /*
 312          * Init fid sequence client for this mdc and add new fld target.
 313          */
 314         rc = obd_fid_init(mdc_obd, mdc_exp, LUSTRE_SEQ_METADATA);
 315         if (rc)
 316                 RETURN(rc);
 317
 318         target.ft_srv = NULL;
 319         target.ft_exp = mdc_exp;
 320         target.ft_idx = tgt->ltd_index;
 321
 322         fld_client_add_target(&lmv->lmv_fld, &target);
 323
 324         rc = obd_register_observer(mdc_obd, obd);
 325         if (rc) {
 326                 obd_disconnect(mdc_exp);
 327                 CERROR("target %s register_observer error %d\n",
 328                        tgt->ltd_uuid.uuid, rc);
 329                 RETURN(rc);
 330         }
 331
 332         if (obd->obd_observer) {
 333                 /*
 334                  * Tell the observer about the new target.
 335                  */
 336                 rc = obd_notify(obd->obd_observer, mdc_exp->exp_obd,
 337                                 OBD_NOTIFY_ACTIVE);
 338                 if (rc) {
 339                         obd_disconnect(mdc_exp);
 340                         RETURN(rc);
 341                 }
 342         }
 343
 344         tgt->ltd_active = 1;
 345         tgt->ltd_exp = mdc_exp;
 346         lmv->desc.ld_active_tgt_count++;
 347
 348         md_init_ea_size(tgt->ltd_exp, lmv->max_easize, lmv->max_def_easize);
 349
 350         rc = lqos_add_tgt(&lmv->lmv_qos, tgt);
 351         if (rc) {
 352                 obd_disconnect(mdc_exp);
 353                 RETURN(rc);
 354         }
 355
 356         CDEBUG(D_CONFIG, "Connected to %s(%s) successfully (%d)\n",
 357                 mdc_obd->obd_name, mdc_obd->obd_uuid.uuid,
 358                 atomic_read(&obd->obd_refcount));
 359
 360         lmv_statfs_check_update(obd, tgt);
 361
 362         if (lmv->lmv_tgts_kobj)
 363                 /* Even if we failed to create the link, that's fine */
 364                 rc = sysfs_create_link(lmv->lmv_tgts_kobj,
 365                                        &mdc_obd->obd_kset.kobj,
 366                                        mdc_obd->obd_name);
 367         RETURN(0);
 368 }
 369
 370 static void lmv_del_target(struct lmv_obd *lmv, struct lu_tgt_desc *tgt)
 371 {
 372         LASSERT(tgt);
 373         lqos_del_tgt(&lmv->lmv_qos, tgt);
 374         lu_tgt_descs_del(&lmv->lmv_mdt_descs, tgt);
 375         OBD_FREE_PTR(tgt);
 376 }
 377
 378 static int lmv_add_target(struct obd_device *obd, struct obd_uuid *uuidp,
 379                            __u32 index, int gen)
 380 {
 381         struct obd_device *mdc_obd;
 382         struct lmv_obd *lmv = &obd->u.lmv;
 383         struct lmv_tgt_desc *tgt;
 384         struct lu_tgt_descs *ltd = &lmv->lmv_mdt_descs;
 385         int orig_tgt_count = 0;
 386         int rc = 0;
 387
 388         ENTRY;
 389
 390         CDEBUG(D_CONFIG, "Target uuid: %s. index %d\n", uuidp->uuid, index);
 391         mdc_obd = class_find_client_obd(uuidp, LUSTRE_MDC_NAME,
 392                                         &obd->obd_uuid);
 393         if (!mdc_obd) {
 394                 CERROR("%s: Target %s not attached: rc = %d\n",
 395                        obd->obd_name, uuidp->uuid, -EINVAL);
 396                 RETURN(-EINVAL);
 397         }
 398
 399         OBD_ALLOC_PTR(tgt);
 400         if (!tgt)
 401                 RETURN(-ENOMEM);
 402
 403         mutex_init(&tgt->ltd_fid_mutex);
 404         tgt->ltd_index = index;
 405         tgt->ltd_uuid = *uuidp;
 406         tgt->ltd_active = 0;
 407
 408         mutex_lock(&ltd->ltd_mutex);
 409         rc = lu_tgt_descs_add(ltd, tgt);
 410         if (!rc && index >= lmv->desc.ld_tgt_count) {
 411                 orig_tgt_count = lmv->desc.ld_tgt_count;
 412                 lmv->desc.ld_tgt_count = index + 1;
 413         }
 414         mutex_unlock(&ltd->ltd_mutex);
 415
 416         if (rc)
 417                 GOTO(out_tgt, rc);
 418
 419         if (!lmv->connected)
 420                 /* lmv_check_connect() will connect this target. */
 421                 RETURN(0);
 422
 423         rc = lmv_connect_mdc(obd, tgt);
 424         if (rc != 0) {
 425                 mutex_lock(&ltd->ltd_mutex);
 426                 lmv->desc.ld_tgt_count = orig_tgt_count;
 427                 memset(tgt, 0, sizeof(*tgt));
 428                 mutex_unlock(&ltd->ltd_mutex);
 429         } else {
 430                 int easize = sizeof(struct lmv_stripe_md) +
 431                         lmv->desc.ld_tgt_count * sizeof(struct lu_fid);
 432                 lmv_init_ea_size(obd->obd_self_export, easize, 0);
 433         }
 434
 435         RETURN(rc);
 436
 437 out_tgt:
 438         OBD_FREE_PTR(tgt);
 439         return rc;
 440 }
 441
 442 static int lmv_check_connect(struct obd_device *obd)
 443 {
 444         struct lmv_obd *lmv = &obd->u.lmv;
 445         struct lmv_tgt_desc *tgt;
 446         int easize;
 447         int rc;
 448
 449         ENTRY;
 450
 451         if (lmv->connected)
 452                 RETURN(0);
 453
 454         mutex_lock(&lmv->lmv_mdt_descs.ltd_mutex);
 455         if (lmv->connected)
 456                 GOTO(unlock, rc = 0);
 457
 458         if (lmv->desc.ld_tgt_count == 0) {
 459                 CERROR("%s: no targets configured: rc = -EINVAL\n",
 460                        obd->obd_name);
 461                 GOTO(unlock, rc = -EINVAL);
 462         }
 463
 464         if (!lmv_mdt0_inited(lmv)) {
 465                 CERROR("%s: no target configured for index 0: rc = -EINVAL.\n",
 466                        obd->obd_name);
 467                 GOTO(unlock, rc = -EINVAL);
 468         }
 469
 470         CDEBUG(D_CONFIG, "Time to connect %s to %s\n",
 471                obd->obd_uuid.uuid, obd->obd_name);
 472
 473         lmv_foreach_tgt(lmv, tgt) {
 474                 rc = lmv_connect_mdc(obd, tgt);
 475                 if (rc)
 476                         GOTO(out_disc, rc);
 477         }
 478
 479         lmv->connected = 1;
 480         easize = lmv_mds_md_size(lmv->desc.ld_tgt_count, LMV_MAGIC);
 481         lmv_init_ea_size(obd->obd_self_export, easize, 0);
 482         EXIT;
 483 unlock:
 484         mutex_unlock(&lmv->lmv_mdt_descs.ltd_mutex);
 485
 486         return rc;
 487
 488 out_disc:
 489         lmv_foreach_tgt(lmv, tgt) {
 490                 tgt->ltd_active = 0;
 491                 if (!tgt->ltd_exp)
 492                         continue;
 493
 494                 --lmv->desc.ld_active_tgt_count;
 495                 obd_disconnect(tgt->ltd_exp);
 496         }
 497
 498         goto unlock;
 499 }
 500
 501 static int lmv_disconnect_mdc(struct obd_device *obd, struct lmv_tgt_desc *tgt)
 502 {
 503         struct lmv_obd         *lmv = &obd->u.lmv;
 504         struct obd_device      *mdc_obd;
 505         int                     rc;
 506         ENTRY;
 507
 508         LASSERT(tgt != NULL);
 509         LASSERT(obd != NULL);
 510
 511         mdc_obd = class_exp2obd(tgt->ltd_exp);
 512
 513         if (mdc_obd) {
 514                 mdc_obd->obd_force = obd->obd_force;
 515                 mdc_obd->obd_fail = obd->obd_fail;
 516                 mdc_obd->obd_no_recov = obd->obd_no_recov;
 517
 518                 if (lmv->lmv_tgts_kobj)
 519                         sysfs_remove_link(lmv->lmv_tgts_kobj,
 520                                           mdc_obd->obd_name);
 521         }
 522
 523         rc = obd_fid_fini(tgt->ltd_exp->exp_obd);
 524         if (rc)
 525                 CERROR("Can't finanize fids factory\n");
 526
 527         CDEBUG(D_INFO, "Disconnected from %s(%s) successfully\n",
 528                tgt->ltd_exp->exp_obd->obd_name,
 529                tgt->ltd_exp->exp_obd->obd_uuid.uuid);
 530
 531         obd_register_observer(tgt->ltd_exp->exp_obd, NULL);
 532         rc = obd_disconnect(tgt->ltd_exp);
 533         if (rc) {
 534                 if (tgt->ltd_active) {
 535                         CERROR("Target %s disconnect error %d\n",
 536                                tgt->ltd_uuid.uuid, rc);
 537                 }
 538         }
 539
 540         lmv_activate_target(lmv, tgt, 0);
 541         tgt->ltd_exp = NULL;
 542         RETURN(0);
 543 }
 544
 545 static int lmv_disconnect(struct obd_export *exp)
 546 {
 547         struct obd_device *obd = class_exp2obd(exp);
 548         struct lmv_obd *lmv = &obd->u.lmv;
 549         struct lmv_tgt_desc *tgt;
 550         int rc;
 551
 552         ENTRY;
 553
 554         lmv_foreach_connected_tgt(lmv, tgt)
 555                 lmv_disconnect_mdc(obd, tgt);
 556
 557         if (lmv->lmv_tgts_kobj)
 558                 kobject_put(lmv->lmv_tgts_kobj);
 559
 560         if (!lmv->connected)
 561                 class_export_put(exp);
 562         rc = class_disconnect(exp);
 563         lmv->connected = 0;
 564
 565         RETURN(rc);
 566 }
 567
 568 static int lmv_fid2path(struct obd_export *exp, int len, void *karg,
 569                         void __user *uarg)
 570 {
 571         struct obd_device *obddev = class_exp2obd(exp);
 572         struct lmv_obd *lmv = &obddev->u.lmv;
 573         struct getinfo_fid2path *gf;
 574         struct lmv_tgt_desc *tgt;
 575         struct getinfo_fid2path *remote_gf = NULL;
 576         struct lu_fid root_fid;
 577         int remote_gf_size = 0;
 578         int rc;
 579
 580         gf = karg;
 581         tgt = lmv_fid2tgt(lmv, &gf->gf_fid);
 582         if (IS_ERR(tgt))
 583                 RETURN(PTR_ERR(tgt));
 584
 585         root_fid = *gf->gf_u.gf_root_fid;
 586         LASSERT(fid_is_sane(&root_fid));
 587
 588 repeat_fid2path:
 589         rc = obd_iocontrol(OBD_IOC_FID2PATH, tgt->ltd_exp, len, gf, uarg);
 590         if (rc != 0 && rc != -EREMOTE)
 591                 GOTO(out_fid2path, rc);
 592
 593         /* If remote_gf != NULL, it means just building the
 594          * path on the remote MDT, copy this path segement to gf */
 595         if (remote_gf != NULL) {
 596                 struct getinfo_fid2path *ori_gf;
 597                 char *ptr;
 598                 int len;
 599
 600                 ori_gf = (struct getinfo_fid2path *)karg;
 601                 if (strlen(ori_gf->gf_u.gf_path) + 1 +
 602                     strlen(gf->gf_u.gf_path) + 1 > ori_gf->gf_pathlen)
 603                         GOTO(out_fid2path, rc = -EOVERFLOW);
 604
 605                 ptr = ori_gf->gf_u.gf_path;
 606
 607                 len = strlen(gf->gf_u.gf_path);
 608                 /* move the current path to the right to release space
 609                  * for closer-to-root part */
 610                 memmove(ptr + len + 1, ptr, strlen(ori_gf->gf_u.gf_path));
 611                 memcpy(ptr, gf->gf_u.gf_path, len);
 612                 ptr[len] = '/';
 613         }
 614
 615         CDEBUG(D_INFO, "%s: get path %s "DFID" rec: %llu ln: %u\n",
 616                tgt->ltd_exp->exp_obd->obd_name,
 617                gf->gf_u.gf_path, PFID(&gf->gf_fid), gf->gf_recno,
 618                gf->gf_linkno);
 619
 620         if (rc == 0)
 621                 GOTO(out_fid2path, rc);
 622
 623         /* sigh, has to go to another MDT to do path building further */
 624         if (remote_gf == NULL) {
 625                 remote_gf_size = sizeof(*remote_gf) + PATH_MAX;
 626                 OBD_ALLOC(remote_gf, remote_gf_size);
 627                 if (remote_gf == NULL)
 628                         GOTO(out_fid2path, rc = -ENOMEM);
 629                 remote_gf->gf_pathlen = PATH_MAX;
 630         }
 631
 632         if (!fid_is_sane(&gf->gf_fid)) {
 633                 CERROR("%s: invalid FID "DFID": rc = %d\n",
 634                        tgt->ltd_exp->exp_obd->obd_name,
 635                        PFID(&gf->gf_fid), -EINVAL);
 636                 GOTO(out_fid2path, rc = -EINVAL);
 637         }
 638
 639         tgt = lmv_fid2tgt(lmv, &gf->gf_fid);
 640         if (IS_ERR(tgt))
 641                 GOTO(out_fid2path, rc = -EINVAL);
 642
 643         remote_gf->gf_fid = gf->gf_fid;
 644         remote_gf->gf_recno = -1;
 645         remote_gf->gf_linkno = -1;
 646         memset(remote_gf->gf_u.gf_path, 0, remote_gf->gf_pathlen);
 647         *remote_gf->gf_u.gf_root_fid = root_fid;
 648         gf = remote_gf;
 649         goto repeat_fid2path;
 650
 651 out_fid2path:
 652         if (remote_gf != NULL)
 653                 OBD_FREE(remote_gf, remote_gf_size);
 654         RETURN(rc);
 655 }
 656
 657 static int lmv_hsm_req_count(struct lmv_obd *lmv,
 658                              const struct hsm_user_request *hur,
 659                              const struct lmv_tgt_desc *tgt_mds)
 660 {
 661         struct lmv_tgt_desc *curr_tgt;
 662         __u32 i;
 663         int nr = 0;
 664
 665         /* count how many requests must be sent to the given target */
 666         for (i = 0; i < hur->hur_request.hr_itemcount; i++) {
 667                 curr_tgt = lmv_fid2tgt(lmv, &hur->hur_user_item[i].hui_fid);
 668                 if (IS_ERR(curr_tgt))
 669                         RETURN(PTR_ERR(curr_tgt));
 670                 if (obd_uuid_equals(&curr_tgt->ltd_uuid, &tgt_mds->ltd_uuid))
 671                         nr++;
 672         }
 673         return nr;
 674 }
 675
 676 static int lmv_hsm_req_build(struct lmv_obd *lmv,
 677                               struct hsm_user_request *hur_in,
 678                               const struct lmv_tgt_desc *tgt_mds,
 679                               struct hsm_user_request *hur_out)
 680 {
 681         __u32 i, nr_out;
 682         struct lmv_tgt_desc *curr_tgt;
 683
 684         /* build the hsm_user_request for the given target */
 685         hur_out->hur_request = hur_in->hur_request;
 686         nr_out = 0;
 687         for (i = 0; i < hur_in->hur_request.hr_itemcount; i++) {
 688                 curr_tgt = lmv_fid2tgt(lmv, &hur_in->hur_user_item[i].hui_fid);
 689                 if (IS_ERR(curr_tgt))
 690                         RETURN(PTR_ERR(curr_tgt));
 691                 if (obd_uuid_equals(&curr_tgt->ltd_uuid, &tgt_mds->ltd_uuid)) {
 692                         hur_out->hur_user_item[nr_out] =
 693                                                 hur_in->hur_user_item[i];
 694                         nr_out++;
 695                 }
 696         }
 697         hur_out->hur_request.hr_itemcount = nr_out;
 698         memcpy(hur_data(hur_out), hur_data(hur_in),
 699                hur_in->hur_request.hr_data_len);
 700
 701         RETURN(0);
 702 }
 703
 704 static int lmv_hsm_ct_unregister(struct obd_device *obd, unsigned int cmd,
 705                                  int len, struct lustre_kernelcomm *lk,
 706                                  void __user *uarg)
 707 {
 708         struct lmv_obd *lmv = &obd->u.lmv;
 709         struct lu_tgt_desc *tgt;
 710         int rc;
 711
 712         ENTRY;
 713
 714         /* unregister request (call from llapi_hsm_copytool_fini) */
 715         lmv_foreach_connected_tgt(lmv, tgt)
 716                 /* best effort: try to clean as much as possible
 717                  * (continue on error) */
 718                 obd_iocontrol(cmd, tgt->ltd_exp, len, lk, uarg);
 719
 720         /* Whatever the result, remove copytool from kuc groups.
 721          * Unreached coordinators will get EPIPE on next requests
 722          * and will unregister automatically.
 723          */
 724         rc = libcfs_kkuc_group_rem(&obd->obd_uuid, lk->lk_uid, lk->lk_group);
 725
 726         RETURN(rc);
 727 }
 728
 729 static int lmv_hsm_ct_register(struct obd_device *obd, unsigned int cmd,
 730                                int len, struct lustre_kernelcomm *lk,
 731                                void __user *uarg)
 732 {
 733         struct lmv_obd *lmv = &obd->u.lmv;
 734         struct file *filp;
 735         bool any_set = false;
 736         struct kkuc_ct_data *kcd;
 737         size_t kcd_size;
 738         struct lu_tgt_desc *tgt;
 739         __u32 i;
 740         int err;
 741         int rc = 0;
 742
 743         ENTRY;
 744
 745         filp = fget(lk->lk_wfd);
 746         if (!filp)
 747                 RETURN(-EBADF);
 748
 749         if (lk->lk_flags & LK_FLG_DATANR)
 750                 kcd_size = offsetof(struct kkuc_ct_data,
 751                                     kcd_archives[lk->lk_data_count]);
 752         else
 753                 kcd_size = sizeof(*kcd);
 754
 755         OBD_ALLOC(kcd, kcd_size);
 756         if (kcd == NULL)
 757                 GOTO(err_fput, rc = -ENOMEM);
 758
 759         kcd->kcd_nr_archives = lk->lk_data_count;
 760         if (lk->lk_flags & LK_FLG_DATANR) {
 761                 kcd->kcd_magic = KKUC_CT_DATA_ARRAY_MAGIC;
 762                 if (lk->lk_data_count > 0)
 763                         memcpy(kcd->kcd_archives, lk->lk_data,
 764                                sizeof(*kcd->kcd_archives) * lk->lk_data_count);
 765         } else {
 766                 kcd->kcd_magic = KKUC_CT_DATA_BITMAP_MAGIC;
 767         }
 768
 769         rc = libcfs_kkuc_group_add(filp, &obd->obd_uuid, lk->lk_uid,
 770                                    lk->lk_group, kcd, kcd_size);
 771         OBD_FREE(kcd, kcd_size);
 772         if (rc)
 773                 GOTO(err_fput, rc);
 774
 775         /* All or nothing: try to register to all MDS.
 776          * In case of failure, unregister from previous MDS,
 777          * except if it because of inactive target. */
 778         lmv_foreach_connected_tgt(lmv, tgt) {
 779                 err = obd_iocontrol(cmd, tgt->ltd_exp, len, lk, uarg);
 780                 if (err) {
 781                         if (tgt->ltd_active) {
 782                                 /* permanent error */
 783                                 CERROR("%s: iocontrol MDC %s on MDT"
 784                                        " idx %d cmd %x: err = %d\n",
 785                                        lmv2obd_dev(lmv)->obd_name,
 786                                        tgt->ltd_uuid.uuid, tgt->ltd_index, cmd,
 787                                        err);
 788                                 rc = err;
 789                                 lk->lk_flags |= LK_FLG_STOP;
 790                                 i = tgt->ltd_index;
 791                                 /* unregister from previous MDS */
 792                                 lmv_foreach_connected_tgt(lmv, tgt) {
 793                                         if (tgt->ltd_index >= i)
 794                                                 break;
 795
 796                                         obd_iocontrol(cmd, tgt->ltd_exp, len,
 797                                                       lk, uarg);
 798                                 }
 799                                 GOTO(err_kkuc_rem, rc);
 800                         }
 801                         /* else: transient error.
 802                          * kuc will register to the missing MDT
 803                          * when it is back */
 804                 } else {
 805                         any_set = true;
 806                 }
 807         }
 808
 809         if (!any_set)
 810                 /* no registration done: return error */
 811                 GOTO(err_kkuc_rem, rc = -ENOTCONN);
 812
 813         RETURN(0);
 814
 815 err_kkuc_rem:
 816         libcfs_kkuc_group_rem(&obd->obd_uuid, lk->lk_uid, lk->lk_group);
 817
 818 err_fput:
 819         fput(filp);
 820         return rc;
 821 }
 822
 823 static int lmv_iocontrol(unsigned int cmd, struct obd_export *exp,
 824                          int len, void *karg, void __user *uarg)
 825 {
 826         struct obd_device *obddev = class_exp2obd(exp);
 827         struct lmv_obd *lmv = &obddev->u.lmv;
 828         struct lu_tgt_desc *tgt = NULL;
 829         int set = 0;
 830         __u32 count = lmv->desc.ld_tgt_count;
 831         int rc = 0;
 832
 833         ENTRY;
 834
 835         if (count == 0)
 836                 RETURN(-ENOTTY);
 837
 838         switch (cmd) {
 839         case IOC_OBD_STATFS: {
 840                 struct obd_ioctl_data *data = karg;
 841                 struct obd_device *mdc_obd;
 842                 struct obd_statfs stat_buf = {0};
 843                 __u32 index;
 844
 845                 memcpy(&index, data->ioc_inlbuf2, sizeof(__u32));
 846                 if (index >= count)
 847                         RETURN(-ENODEV);
 848
 849                 tgt = lmv_tgt(lmv, index);
 850                 if (!tgt || !tgt->ltd_active)
 851                         RETURN(-ENODATA);
 852
 853                 mdc_obd = class_exp2obd(tgt->ltd_exp);
 854                 if (!mdc_obd)
 855                         RETURN(-EINVAL);
 856
 857                 /* copy UUID */
 858                 if (copy_to_user(data->ioc_pbuf2, obd2cli_tgt(mdc_obd),
 859                                  min((int) data->ioc_plen2,
 860                                      (int) sizeof(struct obd_uuid))))
 861                         RETURN(-EFAULT);
 862
 863                 rc = obd_statfs(NULL, tgt->ltd_exp, &stat_buf,
 864                                 ktime_get_seconds() - OBD_STATFS_CACHE_SECONDS,
 865                                 0);
 866                 if (rc)
 867                         RETURN(rc);
 868                 if (copy_to_user(data->ioc_pbuf1, &stat_buf,
 869                                  min((int) data->ioc_plen1,
 870                                      (int) sizeof(stat_buf))))
 871                         RETURN(-EFAULT);
 872                 break;
 873         }
 874         case OBD_IOC_QUOTACTL: {
 875                 struct if_quotactl *qctl = karg;
 876                 struct obd_quotactl *oqctl;
 877
 878                 if (qctl->qc_valid == QC_MDTIDX) {
 879                         if (count <= qctl->qc_idx)
 880                                 RETURN(-EINVAL);
 881
 882                         tgt = lmv_tgt(lmv, qctl->qc_idx);
 883                         if (!tgt || !tgt->ltd_exp)
 884                                 RETURN(-EINVAL);
 885                 } else if (qctl->qc_valid == QC_UUID) {
 886                         lmv_foreach_tgt(lmv, tgt) {
 887                                 if (!obd_uuid_equals(&tgt->ltd_uuid,
 888                                                      &qctl->obd_uuid))
 889                                         continue;
 890
 891                                 if (!tgt->ltd_exp)
 892                                         RETURN(-EINVAL);
 893
 894                                 break;
 895                         }
 896                 } else {
 897                         RETURN(-EINVAL);
 898                 }
 899
 900                 if (tgt->ltd_index >= count)
 901                         RETURN(-EAGAIN);
 902
 903                 LASSERT(tgt != NULL && tgt->ltd_exp != NULL);
 904                 OBD_ALLOC_PTR(oqctl);
 905                 if (!oqctl)
 906                         RETURN(-ENOMEM);
 907
 908                 QCTL_COPY(oqctl, qctl);
 909                 rc = obd_quotactl(tgt->ltd_exp, oqctl);
 910                 if (rc == 0) {
 911                         QCTL_COPY(qctl, oqctl);
 912                         qctl->qc_valid = QC_MDTIDX;
 913                         qctl->obd_uuid = tgt->ltd_uuid;
 914                 }
 915                 OBD_FREE_PTR(oqctl);
 916                 break;
 917         }
 918         case LL_IOC_GET_CONNECT_FLAGS: {
 919                 tgt = lmv_tgt(lmv, 0);
 920                 rc = -ENODATA;
 921                 if (tgt && tgt->ltd_exp)
 922                         rc = obd_iocontrol(cmd, tgt->ltd_exp, len, karg, uarg);
 923                 break;
 924         }
 925         case LL_IOC_FID2MDTIDX: {
 926                 struct lu_fid *fid = karg;
 927                 int             mdt_index;
 928
 929                 rc = lmv_fld_lookup(lmv, fid, &mdt_index);
 930                 if (rc != 0)
 931                         RETURN(rc);
 932
 933                 /* Note: this is from llite(see ll_dir_ioctl()), @uarg does not
 934                  * point to user space memory for FID2MDTIDX. */
 935                 *(__u32 *)uarg = mdt_index;
 936                 break;
 937         }
 938         case OBD_IOC_FID2PATH: {
 939                 rc = lmv_fid2path(exp, len, karg, uarg);
 940                 break;
 941         }
 942         case LL_IOC_HSM_STATE_GET:
 943         case LL_IOC_HSM_STATE_SET:
 944         case LL_IOC_HSM_ACTION: {
 945                 struct md_op_data *op_data = karg;
 946
 947                 tgt = lmv_fid2tgt(lmv, &op_data->op_fid1);
 948                 if (IS_ERR(tgt))
 949                         RETURN(PTR_ERR(tgt));
 950
 951                 if (tgt->ltd_exp == NULL)
 952                         RETURN(-EINVAL);
 953
 954                 rc = obd_iocontrol(cmd, tgt->ltd_exp, len, karg, uarg);
 955                 break;
 956         }
 957         case LL_IOC_HSM_PROGRESS: {
 958                 const struct hsm_progress_kernel *hpk = karg;
 959
 960                 tgt = lmv_fid2tgt(lmv, &hpk->hpk_fid);
 961                 if (IS_ERR(tgt))
 962                         RETURN(PTR_ERR(tgt));
 963                 rc = obd_iocontrol(cmd, tgt->ltd_exp, len, karg, uarg);
 964                 break;
 965         }
 966         case LL_IOC_HSM_REQUEST: {
 967                 struct hsm_user_request *hur = karg;
 968                 unsigned int reqcount = hur->hur_request.hr_itemcount;
 969
 970                 if (reqcount == 0)
 971                         RETURN(0);
 972
 973                 /* if the request is about a single fid
 974                  * or if there is a single MDS, no need to split
 975                  * the request. */
 976                 if (reqcount == 1 || count == 1) {
 977                         tgt = lmv_fid2tgt(lmv, &hur->hur_user_item[0].hui_fid);
 978                         if (IS_ERR(tgt))
 979                                 RETURN(PTR_ERR(tgt));
 980                         rc = obd_iocontrol(cmd, tgt->ltd_exp, len, karg, uarg);
 981                 } else {
 982                         /* split fid list to their respective MDS */
 983                         lmv_foreach_connected_tgt(lmv, tgt) {
 984                                 int nr, rc1;
 985                                 size_t reqlen;
 986                                 struct hsm_user_request *req;
 987
 988                                 nr = lmv_hsm_req_count(lmv, hur, tgt);
 989                                 if (nr < 0)
 990                                         RETURN(nr);
 991                                 if (nr == 0) /* nothing for this MDS */
 992                                         continue;
 993
 994                                 /* build a request with fids for this MDS */
 995                                 reqlen = offsetof(typeof(*hur),
 996                                                   hur_user_item[nr])
 997                                                 + hur->hur_request.hr_data_len;
 998                                 OBD_ALLOC_LARGE(req, reqlen);
 999                                 if (req == NULL)
1000                                         RETURN(-ENOMEM);
1001                                 rc1 = lmv_hsm_req_build(lmv, hur, tgt, req);
1002                                 if (rc1 < 0)
1003                                         GOTO(hsm_req_err, rc1);
1004                                 rc1 = obd_iocontrol(cmd, tgt->ltd_exp, reqlen,
1005                                                     req, uarg);
1006 hsm_req_err:
1007                                 if (rc1 != 0 && rc == 0)
1008                                         rc = rc1;
1009                                 OBD_FREE_LARGE(req, reqlen);
1010                         }
1011                 }
1012                 break;
1013         }
1014         case LL_IOC_LOV_SWAP_LAYOUTS: {
1015                 struct md_op_data *op_data = karg;
1016                 struct lmv_tgt_desc *tgt1, *tgt2;
1017
1018                 tgt1 = lmv_fid2tgt(lmv, &op_data->op_fid1);
1019                 if (IS_ERR(tgt1))
1020                         RETURN(PTR_ERR(tgt1));
1021
1022                 tgt2 = lmv_fid2tgt(lmv, &op_data->op_fid2);
1023                 if (IS_ERR(tgt2))
1024                         RETURN(PTR_ERR(tgt2));
1025
1026                 if ((tgt1->ltd_exp == NULL) || (tgt2->ltd_exp == NULL))
1027                         RETURN(-EINVAL);
1028
1029                 /* only files on same MDT can have their layouts swapped */
1030                 if (tgt1->ltd_index != tgt2->ltd_index)
1031                         RETURN(-EPERM);
1032
1033                 rc = obd_iocontrol(cmd, tgt1->ltd_exp, len, karg, uarg);
1034                 break;
1035         }
1036         case LL_IOC_HSM_CT_START: {
1037                 struct lustre_kernelcomm *lk = karg;
1038                 if (lk->lk_flags & LK_FLG_STOP)
1039                         rc = lmv_hsm_ct_unregister(obddev, cmd, len, lk, uarg);
1040                 else
1041                         rc = lmv_hsm_ct_register(obddev, cmd, len, lk, uarg);
1042                 break;
1043         }
1044         default:
1045                 lmv_foreach_connected_tgt(lmv, tgt) {
1046                         struct obd_device *mdc_obd;
1047                         int err;
1048
1049                         /* ll_umount_begin() sets force flag but for lmv, not
1050                          * mdc. Let's pass it through */
1051                         mdc_obd = class_exp2obd(tgt->ltd_exp);
1052                         mdc_obd->obd_force = obddev->obd_force;
1053                         err = obd_iocontrol(cmd, tgt->ltd_exp, len, karg, uarg);
1054                         if (err) {
1055                                 if (tgt->ltd_active) {
1056                                         CERROR("error: iocontrol MDC %s on MDT"
1057                                                " idx %d cmd %x: err = %d\n",
1058                                                tgt->ltd_uuid.uuid,
1059                                                tgt->ltd_index, cmd, err);
1060                                         if (!rc)
1061                                                 rc = err;
1062                                 }
1063                         } else
1064                                 set = 1;
1065                 }
1066                 if (!set && !rc)
1067                         rc = -EIO;
1068         }
1069         RETURN(rc);
1070 }
1071
1072 /**
1073  * This is _inode_ placement policy function (not name).
1074  */
1075 static u32 lmv_placement_policy(struct obd_device *obd,
1076                                 struct md_op_data *op_data)
1077 {
1078         struct lmv_obd *lmv = &obd->u.lmv;
1079         struct lmv_user_md *lum;
1080         u32 mdt;
1081
1082         ENTRY;
1083
1084         if (lmv->desc.ld_tgt_count == 1)
1085                 RETURN(0);
1086
1087         lum = op_data->op_data;
1088         /*
1089          * Choose MDT by
1090          * 1. See if the stripe offset is specified by lum.
1091          * 2. If parent has default LMV, and its hash type is "space", choose
1092          *    MDT with QoS. (see lmv_locate_tgt_qos()).
1093          * 3. Then check if default LMV stripe offset is not -1.
1094          * 4. Finally choose MDS by name hash if the parent
1095          *    is striped directory. (see lmv_locate_tgt()).
1096          *
1097          * presently explicit MDT location is not supported
1098          * for foreign dirs (as it can't be embedded into free
1099          * format LMV, like with lum_stripe_offset), so we only
1100          * rely on default stripe offset or then name hashing.
1101          */
1102         if (op_data->op_cli_flags & CLI_SET_MEA && lum != NULL &&
1103             le32_to_cpu(lum->lum_magic != LMV_MAGIC_FOREIGN) &&
1104             le32_to_cpu(lum->lum_stripe_offset) != (__u32)-1) {
1105                 mdt = le32_to_cpu(lum->lum_stripe_offset);
1106         } else if (op_data->op_code == LUSTRE_OPC_MKDIR &&
1107                    !lmv_dir_striped(op_data->op_mea1) &&
1108                    lmv_dir_qos_mkdir(op_data->op_default_mea1)) {
1109                 mdt = op_data->op_mds;
1110         } else if (op_data->op_code == LUSTRE_OPC_MKDIR &&
1111                    op_data->op_default_mea1 &&
1112                    op_data->op_default_mea1->lsm_md_master_mdt_index !=
1113                         (__u32)-1) {
1114                 mdt = op_data->op_default_mea1->lsm_md_master_mdt_index;
1115                 op_data->op_mds = mdt;
1116         } else {
1117                 mdt = op_data->op_mds;
1118         }
1119
1120         RETURN(mdt);
1121 }
1122
1123 int __lmv_fid_alloc(struct lmv_obd *lmv, struct lu_fid *fid, u32 mds)
1124 {
1125         struct lmv_tgt_desc *tgt;
1126         int rc;
1127
1128         ENTRY;
1129
1130         tgt = lmv_tgt(lmv, mds);
1131         if (!tgt)
1132                 RETURN(-ENODEV);
1133
1134         /*
1135          * New seq alloc and FLD setup should be atomic. Otherwise we may find
1136          * on server that seq in new allocated fid is not yet known.
1137          */
1138         mutex_lock(&tgt->ltd_fid_mutex);
1139
1140         if (tgt->ltd_active == 0 || tgt->ltd_exp == NULL)
1141                 GOTO(out, rc = -ENODEV);
1142
1143         /*
1144          * Asking underlying tgt layer to allocate new fid.
1145          */
1146         rc = obd_fid_alloc(NULL, tgt->ltd_exp, fid, NULL);
1147         if (rc > 0) {
1148                 LASSERT(fid_is_sane(fid));
1149                 rc = 0;
1150         }
1151
1152         EXIT;
1153 out:
1154         mutex_unlock(&tgt->ltd_fid_mutex);
1155         return rc;
1156 }
1157
1158 int lmv_fid_alloc(const struct lu_env *env, struct obd_export *exp,
1159                   struct lu_fid *fid, struct md_op_data *op_data)
1160 {
1161         struct obd_device *obd = class_exp2obd(exp);
1162         struct lmv_obd *lmv = &obd->u.lmv;
1163         u32 mds;
1164         int rc;
1165
1166         ENTRY;
1167
1168         LASSERT(op_data != NULL);
1169         LASSERT(fid != NULL);
1170
1171         mds = lmv_placement_policy(obd, op_data);
1172
1173         rc = __lmv_fid_alloc(lmv, fid, mds);
1174         if (rc)
1175                 CERROR("Can't alloc new fid, rc %d\n", rc);
1176
1177         RETURN(rc);
1178 }
1179
1180 static int lmv_setup(struct obd_device *obd, struct lustre_cfg *lcfg)
1181 {
1182         struct lmv_obd *lmv = &obd->u.lmv;
1183         struct lmv_desc *desc;
1184         struct lnet_process_id lnet_id;
1185         int i = 0;
1186         int rc;
1187
1188         ENTRY;
1189
1190         if (LUSTRE_CFG_BUFLEN(lcfg, 1) < 1) {
1191                 CERROR("LMV setup requires a descriptor\n");
1192                 RETURN(-EINVAL);
1193         }
1194
1195         desc = (struct lmv_desc *)lustre_cfg_buf(lcfg, 1);
1196         if (sizeof(*desc) > LUSTRE_CFG_BUFLEN(lcfg, 1)) {
1197                 CERROR("Lmv descriptor size wrong: %d > %d\n",
1198                        (int)sizeof(*desc), LUSTRE_CFG_BUFLEN(lcfg, 1));
1199                 RETURN(-EINVAL);
1200         }
1201
1202         obd_str2uuid(&lmv->desc.ld_uuid, desc->ld_uuid.uuid);
1203         lmv->desc.ld_tgt_count = 0;
1204         lmv->desc.ld_active_tgt_count = 0;
1205         lmv->desc.ld_qos_maxage = LMV_DESC_QOS_MAXAGE_DEFAULT;
1206         lmv->max_def_easize = 0;
1207         lmv->max_easize = 0;
1208
1209         spin_lock_init(&lmv->lmv_lock);
1210
1211         /* Set up allocation policy (QoS and RR) */
1212         INIT_LIST_HEAD(&lmv->lmv_qos.lq_svr_list);
1213         init_rwsem(&lmv->lmv_qos.lq_rw_sem);
1214         lmv->lmv_qos.lq_dirty = 1;
1215         lmv->lmv_qos.lq_reset = 1;
1216         /* Default priority is toward free space balance */
1217         lmv->lmv_qos.lq_prio_free = 232;
1218         /* Default threshold for rr (roughly 17%) */
1219         lmv->lmv_qos.lq_threshold_rr = 43;
1220
1221         lu_qos_rr_init(&lmv->lmv_qos.lq_rr);
1222
1223         /*
1224          * initialize rr_index to lower 32bit of netid, so that client
1225          * can distribute subdirs evenly from the beginning.
1226          */
1227         while (LNetGetId(i++, &lnet_id) != -ENOENT) {
1228                 if (LNET_NETTYP(LNET_NIDNET(lnet_id.nid)) != LOLND) {
1229                         lmv->lmv_qos_rr_index = (u32)lnet_id.nid;
1230                         break;
1231                 }
1232         }
1233
1234         rc = lmv_tunables_init(obd);
1235         if (rc)
1236                 CWARN("%s: error adding LMV sysfs/debugfs files: rc = %d\n",
1237                       obd->obd_name, rc);
1238
1239         rc = fld_client_init(&lmv->lmv_fld, obd->obd_name,
1240                              LUSTRE_CLI_FLD_HASH_DHT);
1241         if (rc)
1242                 CERROR("Can't init FLD, err %d\n", rc);
1243
1244         rc = lu_tgt_descs_init(&lmv->lmv_mdt_descs);
1245         if (rc)
1246                 CWARN("%s: error initialize target table: rc = %d\n",
1247                       obd->obd_name, rc);
1248
1249         RETURN(rc);
1250 }
1251
1252 static int lmv_cleanup(struct obd_device *obd)
1253 {
1254         struct lmv_obd *lmv = &obd->u.lmv;
1255         struct lu_tgt_desc *tgt;
1256         struct lu_tgt_desc *tmp;
1257
1258         ENTRY;
1259
1260         fld_client_fini(&lmv->lmv_fld);
1261         lmv_foreach_tgt_safe(lmv, tgt, tmp)
1262                 lmv_del_target(lmv, tgt);
1263         lu_tgt_descs_fini(&lmv->lmv_mdt_descs);
1264
1265         RETURN(0);
1266 }
1267
1268 static int lmv_process_config(struct obd_device *obd, size_t len, void *buf)
1269 {
1270         struct lustre_cfg       *lcfg = buf;
1271         struct obd_uuid         obd_uuid;
1272         int                     gen;
1273         __u32                   index;
1274         int                     rc;
1275         ENTRY;
1276
1277         switch (lcfg->lcfg_command) {
1278         case LCFG_ADD_MDC:
1279                 /* modify_mdc_tgts add 0:lustre-clilmv  1:lustre-MDT0000_UUID
1280                  * 2:0  3:1  4:lustre-MDT0000-mdc_UUID */
1281                 if (LUSTRE_CFG_BUFLEN(lcfg, 1) > sizeof(obd_uuid.uuid))
1282                         GOTO(out, rc = -EINVAL);
1283
1284                 obd_str2uuid(&obd_uuid,  lustre_cfg_buf(lcfg, 1));
1285
1286                 if (sscanf(lustre_cfg_buf(lcfg, 2), "%u", &index) != 1)
1287                         GOTO(out, rc = -EINVAL);
1288                 if (sscanf(lustre_cfg_buf(lcfg, 3), "%d", &gen) != 1)
1289                         GOTO(out, rc = -EINVAL);
1290                 rc = lmv_add_target(obd, &obd_uuid, index, gen);
1291                 GOTO(out, rc);
1292         default:
1293                 CERROR("Unknown command: %d\n", lcfg->lcfg_command);
1294                 GOTO(out, rc = -EINVAL);
1295         }
1296 out:
1297         RETURN(rc);
1298 }
1299
1300 static int lmv_select_statfs_mdt(struct lmv_obd *lmv, __u32 flags)
1301 {
1302         int i;
1303
1304         if (flags & OBD_STATFS_FOR_MDT0)
1305                 return 0;
1306
1307         if (lmv->lmv_statfs_start || lmv->desc.ld_tgt_count == 1)
1308                 return lmv->lmv_statfs_start;
1309
1310         /* choose initial MDT for this client */
1311         for (i = 0;; i++) {
1312                 struct lnet_process_id lnet_id;
1313                 if (LNetGetId(i, &lnet_id) == -ENOENT)
1314                         break;
1315
1316                 if (LNET_NETTYP(LNET_NIDNET(lnet_id.nid)) != LOLND) {
1317                         /* We dont need a full 64-bit modulus, just enough
1318                          * to distribute the requests across MDTs evenly.
1319                          */
1320                         lmv->lmv_statfs_start =
1321                                 (u32)lnet_id.nid % lmv->desc.ld_tgt_count;
1322                         break;
1323                 }
1324         }
1325
1326         return lmv->lmv_statfs_start;
1327 }
1328
1329 static int lmv_statfs(const struct lu_env *env, struct obd_export *exp,
1330                       struct obd_statfs *osfs, time64_t max_age, __u32 flags)
1331 {
1332         struct obd_device *obd = class_exp2obd(exp);
1333         struct lmv_obd *lmv = &obd->u.lmv;
1334         struct obd_statfs *temp;
1335         struct lu_tgt_desc *tgt;
1336         __u32 i;
1337         __u32 idx;
1338         int rc = 0;
1339
1340         ENTRY;
1341
1342         OBD_ALLOC(temp, sizeof(*temp));
1343         if (temp == NULL)
1344                 RETURN(-ENOMEM);
1345
1346         /* distribute statfs among MDTs */
1347         idx = lmv_select_statfs_mdt(lmv, flags);
1348
1349         for (i = 0; i < lmv->desc.ld_tgt_count; i++, idx++) {
1350                 idx = idx % lmv->desc.ld_tgt_count;
1351                 tgt = lmv_tgt(lmv, idx);
1352                 if (!tgt || !tgt->ltd_exp)
1353                         continue;
1354
1355                 rc = obd_statfs(env, tgt->ltd_exp, temp, max_age, flags);
1356                 if (rc) {
1357                         CERROR("%s: can't stat MDS #%d: rc = %d\n",
1358                                tgt->ltd_exp->exp_obd->obd_name, i, rc);
1359                         GOTO(out_free_temp, rc);
1360                 }
1361
1362                 if (temp->os_state & OS_STATE_SUM ||
1363                     flags == OBD_STATFS_FOR_MDT0) {
1364                         /* reset to the last aggregated values
1365                          * and don't sum with non-aggrated data */
1366                         /* If the statfs is from mount, it needs to retrieve
1367                          * necessary information from MDT0. i.e. mount does
1368                          * not need the merged osfs from all of MDT. Also
1369                          * clients can be mounted as long as MDT0 is in
1370                          * service */
1371                         *osfs = *temp;
1372                         break;
1373                 }
1374
1375                 if (i == 0) {
1376                         *osfs = *temp;
1377                 } else {
1378                         osfs->os_bavail += temp->os_bavail;
1379                         osfs->os_blocks += temp->os_blocks;
1380                         osfs->os_ffree += temp->os_ffree;
1381                         osfs->os_files += temp->os_files;
1382                         osfs->os_granted += temp->os_granted;
1383                 }
1384         }
1385
1386         EXIT;
1387 out_free_temp:
1388         OBD_FREE(temp, sizeof(*temp));
1389         return rc;
1390 }
1391
1392 static int lmv_statfs_update(void *cookie, int rc)
1393 {
1394         struct obd_info *oinfo = cookie;
1395         struct obd_device *obd = oinfo->oi_obd;
1396         struct lmv_obd *lmv = &obd->u.lmv;
1397         struct lmv_tgt_desc *tgt = oinfo->oi_tgt;
1398         struct obd_statfs *osfs = oinfo->oi_osfs;
1399
1400         /*
1401          * NB: don't deactivate TGT upon error, because we may not trigger async
1402          * statfs any longer, then there is no chance to activate TGT.
1403          */
1404         if (!rc) {
1405                 spin_lock(&lmv->lmv_lock);
1406                 tgt->ltd_statfs = *osfs;
1407                 tgt->ltd_statfs_age = ktime_get_seconds();
1408                 spin_unlock(&lmv->lmv_lock);
1409                 lmv->lmv_qos.lq_dirty = 1;
1410         }
1411
1412         return rc;
1413 }
1414
1415 /* update tgt statfs async if it's ld_qos_maxage old */
1416 int lmv_statfs_check_update(struct obd_device *obd, struct lmv_tgt_desc *tgt)
1417 {
1418         struct obd_info oinfo = {
1419                 .oi_obd = obd,
1420                 .oi_tgt = tgt,
1421                 .oi_cb_up = lmv_statfs_update,
1422         };
1423         int rc;
1424
1425         if (ktime_get_seconds() - tgt->ltd_statfs_age <
1426             obd->u.lmv.desc.ld_qos_maxage)
1427                 return 0;
1428
1429         rc = obd_statfs_async(tgt->ltd_exp, &oinfo, 0, NULL);
1430
1431         return rc;
1432 }
1433
1434 static int lmv_get_root(struct obd_export *exp, const char *fileset,
1435                         struct lu_fid *fid)
1436 {
1437         struct obd_device *obd = exp->exp_obd;
1438         struct lmv_obd *lmv = &obd->u.lmv;
1439         struct lu_tgt_desc *tgt = lmv_tgt(lmv, 0);
1440         int rc;
1441
1442         ENTRY;
1443
1444         if (!tgt)
1445                 RETURN(-ENODEV);
1446
1447         rc = md_get_root(tgt->ltd_exp, fileset, fid);
1448         RETURN(rc);
1449 }
1450
1451 static int lmv_getxattr(struct obd_export *exp, const struct lu_fid *fid,
1452                         u64 obd_md_valid, const char *name, size_t buf_size,
1453                         struct ptlrpc_request **req)
1454 {
1455         struct obd_device *obd = exp->exp_obd;
1456         struct lmv_obd *lmv = &obd->u.lmv;
1457         struct lmv_tgt_desc *tgt;
1458         int rc;
1459
1460         ENTRY;
1461
1462         tgt = lmv_fid2tgt(lmv, fid);
1463         if (IS_ERR(tgt))
1464                 RETURN(PTR_ERR(tgt));
1465
1466         rc = md_getxattr(tgt->ltd_exp, fid, obd_md_valid, name, buf_size, req);
1467
1468         RETURN(rc);
1469 }
1470
1471 static int lmv_setxattr(struct obd_export *exp, const struct lu_fid *fid,
1472                         u64 obd_md_valid, const char *name,
1473                         const void *value, size_t value_size,
1474                         unsigned int xattr_flags, u32 suppgid,
1475                         struct ptlrpc_request **req)
1476 {
1477         struct obd_device *obd = exp->exp_obd;
1478         struct lmv_obd *lmv = &obd->u.lmv;
1479         struct lmv_tgt_desc *tgt;
1480         int rc;
1481
1482         ENTRY;
1483
1484         tgt = lmv_fid2tgt(lmv, fid);
1485         if (IS_ERR(tgt))
1486                 RETURN(PTR_ERR(tgt));
1487
1488         rc = md_setxattr(tgt->ltd_exp, fid, obd_md_valid, name,
1489                          value, value_size, xattr_flags, suppgid, req);
1490
1491         RETURN(rc);
1492 }
1493
1494 static int lmv_getattr(struct obd_export *exp, struct md_op_data *op_data,
1495                        struct ptlrpc_request **request)
1496 {
1497         struct obd_device *obd = exp->exp_obd;
1498         struct lmv_obd *lmv = &obd->u.lmv;
1499         struct lmv_tgt_desc *tgt;
1500         int rc;
1501
1502         ENTRY;
1503
1504         tgt = lmv_fid2tgt(lmv, &op_data->op_fid1);
1505         if (IS_ERR(tgt))
1506                 RETURN(PTR_ERR(tgt));
1507
1508         if (op_data->op_flags & MF_GET_MDT_IDX) {
1509                 op_data->op_mds = tgt->ltd_index;
1510                 RETURN(0);
1511         }
1512
1513         rc = md_getattr(tgt->ltd_exp, op_data, request);
1514
1515         RETURN(rc);
1516 }
1517
1518 static int lmv_null_inode(struct obd_export *exp, const struct lu_fid *fid)
1519 {
1520         struct obd_device *obd = exp->exp_obd;
1521         struct lmv_obd *lmv = &obd->u.lmv;
1522         struct lu_tgt_desc *tgt;
1523
1524         ENTRY;
1525
1526         CDEBUG(D_INODE, "CBDATA for "DFID"\n", PFID(fid));
1527
1528         /*
1529          * With DNE every object can have two locks in different namespaces:
1530          * lookup lock in space of MDT storing direntry and update/open lock in
1531          * space of MDT storing inode.
1532          */
1533         lmv_foreach_connected_tgt(lmv, tgt)
1534                 md_null_inode(tgt->ltd_exp, fid);
1535
1536         RETURN(0);
1537 }
1538
1539 static int lmv_close(struct obd_export *exp, struct md_op_data *op_data,
1540                      struct md_open_data *mod, struct ptlrpc_request **request)
1541 {
1542         struct obd_device *obd = exp->exp_obd;
1543         struct lmv_obd *lmv = &obd->u.lmv;
1544         struct lmv_tgt_desc *tgt;
1545         int rc;
1546
1547         ENTRY;
1548
1549         tgt = lmv_fid2tgt(lmv, &op_data->op_fid1);
1550         if (IS_ERR(tgt))
1551                 RETURN(PTR_ERR(tgt));
1552
1553         CDEBUG(D_INODE, "CLOSE "DFID"\n", PFID(&op_data->op_fid1));
1554         rc = md_close(tgt->ltd_exp, op_data, mod, request);
1555         RETURN(rc);
1556 }
1557
1558 static struct lmv_tgt_desc *
1559 lmv_locate_tgt_by_name(struct lmv_obd *lmv, struct lmv_stripe_md *lsm,
1560                        const char *name, int namelen, struct lu_fid *fid,
1561                        __u32 *mds, bool post_migrate)
1562 {
1563         struct lmv_tgt_desc *tgt;
1564         const struct lmv_oinfo *oinfo;
1565
1566         if (!lmv_dir_striped(lsm) || !namelen) {
1567                 tgt = lmv_fid2tgt(lmv, fid);
1568                 if (IS_ERR(tgt))
1569                         return tgt;
1570
1571                 *mds = tgt->ltd_index;
1572                 return tgt;
1573         }
1574
1575         if (OBD_FAIL_CHECK(OBD_FAIL_LFSCK_BAD_NAME_HASH)) {
1576                 if (cfs_fail_val >= lsm->lsm_md_stripe_count)
1577                         return ERR_PTR(-EBADF);
1578                 oinfo = &lsm->lsm_md_oinfo[cfs_fail_val];
1579         } else {
1580                 oinfo = lsm_name_to_stripe_info(lsm, name, namelen,
1581                                                 post_migrate);
1582                 if (IS_ERR(oinfo))
1583                         return ERR_CAST(oinfo);
1584         }
1585
1586         *fid = oinfo->lmo_fid;
1587         *mds = oinfo->lmo_mds;
1588         tgt = lmv_tgt(lmv, oinfo->lmo_mds);
1589
1590         CDEBUG(D_INODE, "locate MDT %u parent "DFID"\n", *mds, PFID(fid));
1591
1592         return tgt ? tgt : ERR_PTR(-ENODEV);
1593 }
1594
1595 /**
1596  * Locate MDT of op_data->op_fid1
1597  *
1598  * For striped directory, it will locate the stripe by name hash, if hash_type
1599  * is unknown, it will return the stripe specified by 'op_data->op_stripe_index'
1600  * which is set outside, and if dir is migrating, 'op_data->op_post_migrate'
1601  * indicates whether old or new layout is used to locate.
1602  *
1603  * For plain direcotry, normally it will locate MDT by FID, but if this
1604  * directory has default LMV, and its hash type is "space", locate MDT with QoS.
1605  *
1606  * \param[in] lmv       LMV device
1607  * \param[in] op_data   client MD stack parameters, name, namelen
1608  *                      mds_num etc.
1609  *
1610  * retval               pointer to the lmv_tgt_desc if succeed.
1611  *                      ERR_PTR(errno) if failed.
1612  */
1613 struct lmv_tgt_desc *
1614 lmv_locate_tgt(struct lmv_obd *lmv, struct md_op_data *op_data)
1615 {
1616         struct lmv_stripe_md *lsm = op_data->op_mea1;
1617         struct lmv_oinfo *oinfo;
1618         struct lmv_tgt_desc *tgt;
1619
1620         if (lmv_dir_foreign(lsm))
1621                 return ERR_PTR(-ENODATA);
1622
1623         /* During creating VOLATILE file, it should honor the mdt
1624          * index if the file under striped dir is being restored, see
1625          * ct_restore(). */
1626         if (op_data->op_bias & MDS_CREATE_VOLATILE &&
1627             (int)op_data->op_mds != -1) {
1628                 tgt = lmv_tgt(lmv, op_data->op_mds);
1629                 if (!tgt)
1630                         return ERR_PTR(-ENODEV);
1631
1632                 if (lmv_dir_striped(lsm)) {
1633                         int i;
1634
1635                         /* refill the right parent fid */
1636                         for (i = 0; i < lsm->lsm_md_stripe_count; i++) {
1637                                 oinfo = &lsm->lsm_md_oinfo[i];
1638                                 if (oinfo->lmo_mds == op_data->op_mds) {
1639                                         op_data->op_fid1 = oinfo->lmo_fid;
1640                                         break;
1641                                 }
1642                         }
1643
1644                         if (i == lsm->lsm_md_stripe_count)
1645                                 op_data->op_fid1 = lsm->lsm_md_oinfo[0].lmo_fid;
1646                 }
1647         } else if (lmv_dir_bad_hash(lsm)) {
1648                 LASSERT(op_data->op_stripe_index < lsm->lsm_md_stripe_count);
1649                 oinfo = &lsm->lsm_md_oinfo[op_data->op_stripe_index];
1650
1651                 op_data->op_fid1 = oinfo->lmo_fid;
1652                 op_data->op_mds = oinfo->lmo_mds;
1653                 tgt = lmv_tgt(lmv, oinfo->lmo_mds);
1654                 if (!tgt)
1655                         tgt = ERR_PTR(-ENODEV);
1656         } else if (op_data->op_code == LUSTRE_OPC_MKDIR &&
1657                    lmv_dir_qos_mkdir(op_data->op_default_mea1) &&
1658                    !lmv_dir_striped(lsm)) {
1659                 tgt = lmv_locate_tgt_qos(lmv, &op_data->op_mds);
1660                 if (tgt == ERR_PTR(-EAGAIN))
1661                         tgt = lmv_locate_tgt_rr(lmv, &op_data->op_mds);
1662                 /*
1663                  * only update statfs when mkdir under dir with "space" hash,
1664                  * this means the cached statfs may be stale, and current mkdir
1665                  * may not follow QoS accurately, but it's not serious, and it
1666                  * avoids periodic statfs when client doesn't mkdir under
1667                  * "space" hashed directories.
1668                  *
1669                  * TODO: after MDT support QoS object allocation, also update
1670                  * statfs for 'lfs mkdir -i -1 ...", currently it's done in user
1671                  * space.
1672                  */
1673                 if (!IS_ERR(tgt)) {
1674                         struct obd_device *obd;
1675
1676                         obd = container_of(lmv, struct obd_device, u.lmv);
1677                         lmv_statfs_check_update(obd, tgt);
1678                 }
1679         } else {
1680                 tgt = lmv_locate_tgt_by_name(lmv, op_data->op_mea1,
1681                                 op_data->op_name, op_data->op_namelen,
1682                                 &op_data->op_fid1, &op_data->op_mds,
1683                                 op_data->op_post_migrate);
1684         }
1685
1686         return tgt;
1687 }
1688
1689 /* Locate MDT of op_data->op_fid2 for link/rename */
1690 static struct lmv_tgt_desc *
1691 lmv_locate_tgt2(struct lmv_obd *lmv, struct md_op_data *op_data)
1692 {
1693         struct lmv_tgt_desc *tgt;
1694         int rc;
1695
1696         LASSERT(op_data->op_name);
1697         if (lmv_dir_migrating(op_data->op_mea2)) {
1698                 struct lu_fid fid1 = op_data->op_fid1;
1699                 struct lmv_stripe_md *lsm1 = op_data->op_mea1;
1700                 struct ptlrpc_request *request = NULL;
1701
1702                 /*
1703                  * avoid creating new file under old layout of migrating
1704                  * directory, check it here.
1705                  */
1706                 tgt = lmv_locate_tgt_by_name(lmv, op_data->op_mea2,
1707                                 op_data->op_name, op_data->op_namelen,
1708                                 &op_data->op_fid2, &op_data->op_mds, false);
1709                 if (IS_ERR(tgt))
1710                         RETURN(tgt);
1711
1712                 op_data->op_fid1 = op_data->op_fid2;
1713                 op_data->op_mea1 = op_data->op_mea2;
1714                 rc = md_getattr_name(tgt->ltd_exp, op_data, &request);
1715                 op_data->op_fid1 = fid1;
1716                 op_data->op_mea1 = lsm1;
1717                 if (!rc) {
1718                         ptlrpc_req_finished(request);
1719                         RETURN(ERR_PTR(-EEXIST));
1720                 }
1721
1722                 if (rc != -ENOENT)
1723                         RETURN(ERR_PTR(rc));
1724         }
1725
1726         return lmv_locate_tgt_by_name(lmv, op_data->op_mea2, op_data->op_name,
1727                                 op_data->op_namelen, &op_data->op_fid2,
1728                                 &op_data->op_mds, true);
1729 }
1730
1731 int lmv_create(struct obd_export *exp, struct md_op_data *op_data,
1732                 const void *data, size_t datalen, umode_t mode, uid_t uid,
1733                 gid_t gid, cfs_cap_t cap_effective, __u64 rdev,
1734                 struct ptlrpc_request **request)
1735 {
1736         struct obd_device *obd = exp->exp_obd;
1737         struct lmv_obd *lmv = &obd->u.lmv;
1738         struct lmv_tgt_desc *tgt;
1739         int rc;
1740
1741         ENTRY;
1742
1743         if (!lmv->desc.ld_active_tgt_count)
1744                 RETURN(-EIO);
1745
1746         if (lmv_dir_bad_hash(op_data->op_mea1))
1747                 RETURN(-EBADF);
1748
1749         if (lmv_dir_migrating(op_data->op_mea1)) {
1750                 /*
1751                  * if parent is migrating, create() needs to lookup existing
1752                  * name, to avoid creating new file under old layout of
1753                  * migrating directory, check old layout here.
1754                  */
1755                 tgt = lmv_locate_tgt(lmv, op_data);
1756                 if (IS_ERR(tgt))
1757                         RETURN(PTR_ERR(tgt));
1758
1759                 rc = md_getattr_name(tgt->ltd_exp, op_data, request);
1760                 if (!rc) {
1761                         ptlrpc_req_finished(*request);
1762                         *request = NULL;
1763                         RETURN(-EEXIST);
1764                 }
1765
1766                 if (rc != -ENOENT)
1767                         RETURN(rc);
1768
1769                 op_data->op_post_migrate = true;
1770         }
1771
1772         tgt = lmv_locate_tgt(lmv, op_data);
1773         if (IS_ERR(tgt))
1774                 RETURN(PTR_ERR(tgt));
1775
1776         CDEBUG(D_INODE, "CREATE name '%.*s' on "DFID" -> mds #%x\n",
1777                 (int)op_data->op_namelen, op_data->op_name,
1778                 PFID(&op_data->op_fid1), op_data->op_mds);
1779
1780         rc = lmv_fid_alloc(NULL, exp, &op_data->op_fid2, op_data);
1781         if (rc)
1782                 RETURN(rc);
1783
1784         if (exp_connect_flags(exp) & OBD_CONNECT_DIR_STRIPE) {
1785                 /* Send the create request to the MDT where the object
1786                  * will be located */
1787                 tgt = lmv_fid2tgt(lmv, &op_data->op_fid2);
1788                 if (IS_ERR(tgt))
1789                         RETURN(PTR_ERR(tgt));
1790
1791                 op_data->op_mds = tgt->ltd_index;
1792         }
1793
1794         CDEBUG(D_INODE, "CREATE obj "DFID" -> mds #%x\n",
1795                PFID(&op_data->op_fid2), op_data->op_mds);
1796
1797         op_data->op_flags |= MF_MDC_CANCEL_FID1;
1798         rc = md_create(tgt->ltd_exp, op_data, data, datalen, mode, uid, gid,
1799                        cap_effective, rdev, request);
1800         if (rc == 0) {
1801                 if (*request == NULL)
1802                         RETURN(rc);
1803                 CDEBUG(D_INODE, "Created - "DFID"\n", PFID(&op_data->op_fid2));
1804         }
1805         RETURN(rc);
1806 }
1807
1808 static int
1809 lmv_enqueue(struct obd_export *exp, struct ldlm_enqueue_info *einfo,
1810             const union ldlm_policy_data *policy, struct md_op_data *op_data,
1811             struct lustre_handle *lockh, __u64 extra_lock_flags)
1812 {
1813         struct obd_device *obd = exp->exp_obd;
1814         struct lmv_obd *lmv = &obd->u.lmv;
1815         struct lmv_tgt_desc *tgt;
1816         int rc;
1817
1818         ENTRY;
1819
1820         CDEBUG(D_INODE, "ENQUEUE on "DFID"\n", PFID(&op_data->op_fid1));
1821
1822         tgt = lmv_fid2tgt(lmv, &op_data->op_fid1);
1823         if (IS_ERR(tgt))
1824                 RETURN(PTR_ERR(tgt));
1825
1826         CDEBUG(D_INODE, "ENQUEUE on "DFID" -> mds #%u\n",
1827                PFID(&op_data->op_fid1), tgt->ltd_index);
1828
1829         rc = md_enqueue(tgt->ltd_exp, einfo, policy, op_data, lockh,
1830                         extra_lock_flags);
1831
1832         RETURN(rc);
1833 }
1834
1835 int
1836 lmv_getattr_name(struct obd_export *exp,struct md_op_data *op_data,
1837                  struct ptlrpc_request **preq)
1838 {
1839         struct obd_device *obd = exp->exp_obd;
1840         struct lmv_obd *lmv = &obd->u.lmv;
1841         struct lmv_tgt_desc *tgt;
1842         struct mdt_body *body;
1843         int rc;
1844
1845         ENTRY;
1846
1847 retry:
1848         tgt = lmv_locate_tgt(lmv, op_data);
1849         if (IS_ERR(tgt))
1850                 RETURN(PTR_ERR(tgt));
1851
1852         CDEBUG(D_INODE, "GETATTR_NAME for %*s on "DFID" -> mds #%d\n",
1853                 (int)op_data->op_namelen, op_data->op_name,
1854                 PFID(&op_data->op_fid1), tgt->ltd_index);
1855
1856         rc = md_getattr_name(tgt->ltd_exp, op_data, preq);
1857         if (rc == -ENOENT && lmv_dir_retry_check_update(op_data)) {
1858                 ptlrpc_req_finished(*preq);
1859                 *preq = NULL;
1860                 goto retry;
1861         }
1862
1863         if (rc)
1864                 RETURN(rc);
1865
1866         body = req_capsule_server_get(&(*preq)->rq_pill, &RMF_MDT_BODY);
1867         LASSERT(body != NULL);
1868
1869         if (body->mbo_valid & OBD_MD_MDS) {
1870                 op_data->op_fid1 = body->mbo_fid1;
1871                 op_data->op_valid |= OBD_MD_FLCROSSREF;
1872                 op_data->op_namelen = 0;
1873                 op_data->op_name = NULL;
1874
1875                 ptlrpc_req_finished(*preq);
1876                 *preq = NULL;
1877
1878                 goto retry;
1879         }
1880
1881         RETURN(rc);
1882 }
1883
1884 #define md_op_data_fid(op_data, fl)                     \
1885         (fl == MF_MDC_CANCEL_FID1 ? &op_data->op_fid1 : \
1886          fl == MF_MDC_CANCEL_FID2 ? &op_data->op_fid2 : \
1887          fl == MF_MDC_CANCEL_FID3 ? &op_data->op_fid3 : \
1888          fl == MF_MDC_CANCEL_FID4 ? &op_data->op_fid4 : \
1889          NULL)
1890
1891 static int lmv_early_cancel(struct obd_export *exp, struct lmv_tgt_desc *tgt,
1892                             struct md_op_data *op_data, __u32 op_tgt,
1893                             enum ldlm_mode mode, int bits, int flag)
1894 {
1895         struct lu_fid *fid = md_op_data_fid(op_data, flag);
1896         struct lmv_obd *lmv = &exp->exp_obd->u.lmv;
1897         union ldlm_policy_data policy = { { 0 } };
1898         int rc = 0;
1899         ENTRY;
1900
1901         if (!fid_is_sane(fid))
1902                 RETURN(0);
1903
1904         if (tgt == NULL) {
1905                 tgt = lmv_fid2tgt(lmv, fid);
1906                 if (IS_ERR(tgt))
1907                         RETURN(PTR_ERR(tgt));
1908         }
1909
1910         if (tgt->ltd_index != op_tgt) {
1911                 CDEBUG(D_INODE, "EARLY_CANCEL on "DFID"\n", PFID(fid));
1912                 policy.l_inodebits.bits = bits;
1913                 rc = md_cancel_unused(tgt->ltd_exp, fid, &policy,
1914                                       mode, LCF_ASYNC, NULL);
1915         } else {
1916                 CDEBUG(D_INODE,
1917                        "EARLY_CANCEL skip operation target %d on "DFID"\n",
1918                        op_tgt, PFID(fid));
1919                 op_data->op_flags |= flag;
1920                 rc = 0;
1921         }
1922
1923         RETURN(rc);
1924 }
1925
1926 /*
1927  * llite passes fid of an target inode in op_data->op_fid1 and id of directory in
1928  * op_data->op_fid2
1929  */
1930 static int lmv_link(struct obd_export *exp, struct md_op_data *op_data,
1931                     struct ptlrpc_request **request)
1932 {
1933         struct obd_device       *obd = exp->exp_obd;
1934         struct lmv_obd          *lmv = &obd->u.lmv;
1935         struct lmv_tgt_desc     *tgt;
1936         int                      rc;
1937         ENTRY;
1938
1939         LASSERT(op_data->op_namelen != 0);
1940
1941         CDEBUG(D_INODE, "LINK "DFID":%*s to "DFID"\n",
1942                PFID(&op_data->op_fid2), (int)op_data->op_namelen,
1943                op_data->op_name, PFID(&op_data->op_fid1));
1944
1945         op_data->op_fsuid = from_kuid(&init_user_ns, current_fsuid());
1946         op_data->op_fsgid = from_kgid(&init_user_ns, current_fsgid());
1947         op_data->op_cap = cfs_curproc_cap_pack();
1948
1949         tgt = lmv_locate_tgt2(lmv, op_data);
1950         if (IS_ERR(tgt))
1951                 RETURN(PTR_ERR(tgt));
1952
1953         /*
1954          * Cancel UPDATE lock on child (fid1).
1955          */
1956         op_data->op_flags |= MF_MDC_CANCEL_FID2;
1957         rc = lmv_early_cancel(exp, NULL, op_data, tgt->ltd_index, LCK_EX,
1958                               MDS_INODELOCK_UPDATE, MF_MDC_CANCEL_FID1);
1959         if (rc != 0)
1960                 RETURN(rc);
1961
1962         rc = md_link(tgt->ltd_exp, op_data, request);
1963
1964         RETURN(rc);
1965 }
1966
1967 static int lmv_migrate(struct obd_export *exp, struct md_op_data *op_data,
1968                         const char *name, size_t namelen,
1969                         struct ptlrpc_request **request)
1970 {
1971         struct obd_device *obd = exp->exp_obd;
1972         struct lmv_obd *lmv = &obd->u.lmv;
1973         struct lmv_stripe_md *lsm = op_data->op_mea1;
1974         struct lmv_tgt_desc *parent_tgt;
1975         struct lmv_tgt_desc *sp_tgt;
1976         struct lmv_tgt_desc *tp_tgt = NULL;
1977         struct lmv_tgt_desc *child_tgt;
1978         struct lmv_tgt_desc *tgt;
1979         struct lu_fid target_fid;
1980         int rc;
1981
1982         ENTRY;
1983
1984         LASSERT(op_data->op_cli_flags & CLI_MIGRATE);
1985
1986         CDEBUG(D_INODE, "MIGRATE "DFID"/%.*s\n",
1987                PFID(&op_data->op_fid1), (int)namelen, name);
1988
1989         op_data->op_fsuid = from_kuid(&init_user_ns, current_fsuid());
1990         op_data->op_fsgid = from_kgid(&init_user_ns, current_fsgid());
1991         op_data->op_cap = cfs_curproc_cap_pack();
1992
1993         parent_tgt = lmv_fid2tgt(lmv, &op_data->op_fid1);
1994         if (IS_ERR(parent_tgt))
1995                 RETURN(PTR_ERR(parent_tgt));
1996
1997         if (lmv_dir_striped(lsm)) {
1998                 __u32 hash_type = lsm->lsm_md_hash_type;
1999                 __u32 stripe_count = lsm->lsm_md_stripe_count;
2000
2001                 /*
2002                  * old stripes are appended after new stripes for migrating
2003                  * directory.
2004                  */
2005                 if (lmv_dir_migrating(lsm)) {
2006                         hash_type = lsm->lsm_md_migrate_hash;
2007                         stripe_count -= lsm->lsm_md_migrate_offset;
2008                 }
2009
2010                 rc = lmv_name_to_stripe_index(hash_type, stripe_count, name,
2011                                               namelen);
2012                 if (rc < 0)
2013                         RETURN(rc);
2014
2015                 if (lmv_dir_migrating(lsm))
2016                         rc += lsm->lsm_md_migrate_offset;
2017
2018                 /* save it in fid4 temporarily for early cancel */
2019                 op_data->op_fid4 = lsm->lsm_md_oinfo[rc].lmo_fid;
2020                 sp_tgt = lmv_tgt(lmv, lsm->lsm_md_oinfo[rc].lmo_mds);
2021                 if (!sp_tgt)
2022                         RETURN(-ENODEV);
2023
2024                 /*
2025                  * if parent is being migrated too, fill op_fid2 with target
2026                  * stripe fid, otherwise the target stripe is not created yet.
2027                  */
2028                 if (lmv_dir_migrating(lsm)) {
2029                         hash_type = lsm->lsm_md_hash_type &
2030                                     ~LMV_HASH_FLAG_MIGRATION;
2031                         stripe_count = lsm->lsm_md_migrate_offset;
2032
2033                         rc = lmv_name_to_stripe_index(hash_type, stripe_count,
2034                                                       name, namelen);
2035                         if (rc < 0)
2036                                 RETURN(rc);
2037
2038                         op_data->op_fid2 = lsm->lsm_md_oinfo[rc].lmo_fid;
2039                         tp_tgt = lmv_tgt(lmv, lsm->lsm_md_oinfo[rc].lmo_mds);
2040                         if (!tp_tgt)
2041                                 RETURN(-ENODEV);
2042                 }
2043         } else {
2044                 sp_tgt = parent_tgt;
2045         }
2046
2047         child_tgt = lmv_fid2tgt(lmv, &op_data->op_fid3);
2048         if (IS_ERR(child_tgt))
2049                 RETURN(PTR_ERR(child_tgt));
2050
2051         if (!S_ISDIR(op_data->op_mode) && tp_tgt)
2052                 rc = __lmv_fid_alloc(lmv, &target_fid, tp_tgt->ltd_index);
2053         else
2054                 rc = lmv_fid_alloc(NULL, exp, &target_fid, op_data);
2055         if (rc)
2056                 RETURN(rc);
2057
2058         /*
2059          * for directory, send migrate request to the MDT where the object will
2060          * be migrated to, because we can't create a striped directory remotely.
2061          *
2062          * otherwise, send to the MDT where source is located because regular
2063          * file may open lease.
2064          *
2065          * NB. if MDT doesn't support DIR_MIGRATE, send to source MDT too for
2066          * backward compatibility.
2067          */
2068         if (S_ISDIR(op_data->op_mode) &&
2069             (exp_connect_flags2(exp) & OBD_CONNECT2_DIR_MIGRATE)) {
2070                 tgt = lmv_fid2tgt(lmv, &target_fid);
2071                 if (IS_ERR(tgt))
2072                         RETURN(PTR_ERR(tgt));
2073         } else {
2074                 tgt = child_tgt;
2075         }
2076
2077         /* cancel UPDATE lock of parent master object */
2078         rc = lmv_early_cancel(exp, parent_tgt, op_data, tgt->ltd_index, LCK_EX,
2079                               MDS_INODELOCK_UPDATE, MF_MDC_CANCEL_FID1);
2080         if (rc)
2081                 RETURN(rc);
2082
2083         /* cancel UPDATE lock of source parent */
2084         if (sp_tgt != parent_tgt) {
2085                 /*
2086                  * migrate RPC packs master object FID, because we can only pack
2087                  * two FIDs in reint RPC, but MDS needs to know both source
2088                  * parent and target parent, and it will obtain them from master
2089                  * FID and LMV, the other FID in RPC is kept for target.
2090                  *
2091                  * since this FID is not passed to MDC, cancel it anyway.
2092                  */
2093                 rc = lmv_early_cancel(exp, sp_tgt, op_data, -1, LCK_EX,
2094                                       MDS_INODELOCK_UPDATE, MF_MDC_CANCEL_FID4);
2095                 if (rc)
2096                         RETURN(rc);
2097
2098                 op_data->op_flags &= ~MF_MDC_CANCEL_FID4;
2099         }
2100         op_data->op_fid4 = target_fid;
2101
2102         /* cancel UPDATE locks of target parent */
2103         rc = lmv_early_cancel(exp, tp_tgt, op_data, tgt->ltd_index, LCK_EX,
2104                               MDS_INODELOCK_UPDATE, MF_MDC_CANCEL_FID2);
2105         if (rc)
2106                 RETURN(rc);
2107
2108         /* cancel LOOKUP lock of source if source is remote object */
2109         if (child_tgt != sp_tgt) {
2110                 rc = lmv_early_cancel(exp, sp_tgt, op_data, tgt->ltd_index,
2111                                       LCK_EX, MDS_INODELOCK_LOOKUP,
2112                                       MF_MDC_CANCEL_FID3);
2113                 if (rc)
2114                         RETURN(rc);
2115         }
2116
2117         /* cancel ELC locks of source */
2118         rc = lmv_early_cancel(exp, child_tgt, op_data, tgt->ltd_index, LCK_EX,
2119                               MDS_INODELOCK_ELC, MF_MDC_CANCEL_FID3);
2120         if (rc)
2121                 RETURN(rc);
2122
2123         rc = md_rename(tgt->ltd_exp, op_data, name, namelen, NULL, 0, request);
2124
2125         RETURN(rc);
2126 }
2127
2128 static int lmv_rename(struct obd_export *exp, struct md_op_data *op_data,
2129                       const char *old, size_t oldlen,
2130                       const char *new, size_t newlen,
2131                       struct ptlrpc_request **request)
2132 {
2133         struct obd_device *obd = exp->exp_obd;
2134         struct lmv_obd *lmv = &obd->u.lmv;
2135         struct lmv_tgt_desc *sp_tgt;
2136         struct lmv_tgt_desc *tp_tgt = NULL;
2137         struct lmv_tgt_desc *src_tgt = NULL;
2138         struct lmv_tgt_desc *tgt;
2139         struct mdt_body *body;
2140         int rc;
2141
2142         ENTRY;
2143
2144         LASSERT(oldlen != 0);
2145
2146         if (op_data->op_cli_flags & CLI_MIGRATE) {
2147                 rc = lmv_migrate(exp, op_data, old, oldlen, request);
2148                 RETURN(rc);
2149         }
2150
2151         op_data->op_fsuid = from_kuid(&init_user_ns, current_fsuid());
2152         op_data->op_fsgid = from_kgid(&init_user_ns, current_fsgid());
2153         op_data->op_cap = cfs_curproc_cap_pack();
2154
2155         op_data->op_name = new;
2156         op_data->op_namelen = newlen;
2157
2158         tp_tgt = lmv_locate_tgt2(lmv, op_data);
2159         if (IS_ERR(tp_tgt))
2160                 RETURN(PTR_ERR(tp_tgt));
2161
2162         /* Since the target child might be destroyed, and it might become
2163          * orphan, and we can only check orphan on the local MDT right now, so
2164          * we send rename request to the MDT where target child is located. If
2165          * target child does not exist, then it will send the request to the
2166          * target parent */
2167         if (fid_is_sane(&op_data->op_fid4)) {
2168                 tgt = lmv_fid2tgt(lmv, &op_data->op_fid4);
2169                 if (IS_ERR(tgt))
2170                         RETURN(PTR_ERR(tgt));
2171         } else {
2172                 tgt = tp_tgt;
2173         }
2174
2175         op_data->op_flags |= MF_MDC_CANCEL_FID4;
2176
2177         /* cancel UPDATE locks of target parent */
2178         rc = lmv_early_cancel(exp, tp_tgt, op_data, tgt->ltd_index, LCK_EX,
2179                               MDS_INODELOCK_UPDATE, MF_MDC_CANCEL_FID2);
2180         if (rc != 0)
2181                 RETURN(rc);
2182
2183         if (fid_is_sane(&op_data->op_fid4)) {
2184                 /* cancel LOOKUP lock of target on target parent */
2185                 if (tgt != tp_tgt) {
2186                         rc = lmv_early_cancel(exp, tp_tgt, op_data,
2187                                               tgt->ltd_index, LCK_EX,
2188                                               MDS_INODELOCK_LOOKUP,
2189                                               MF_MDC_CANCEL_FID4);
2190                         if (rc != 0)
2191                                 RETURN(rc);
2192                 }
2193         }
2194
2195         if (fid_is_sane(&op_data->op_fid3)) {
2196                 src_tgt = lmv_fid2tgt(lmv, &op_data->op_fid3);
2197                 if (IS_ERR(src_tgt))
2198                         RETURN(PTR_ERR(src_tgt));
2199
2200                 /* cancel ELC locks of source */
2201                 rc = lmv_early_cancel(exp, src_tgt, op_data, tgt->ltd_index,
2202                                       LCK_EX, MDS_INODELOCK_ELC,
2203                                       MF_MDC_CANCEL_FID3);
2204                 if (rc != 0)
2205                         RETURN(rc);
2206         }
2207
2208         op_data->op_name = old;
2209         op_data->op_namelen = oldlen;
2210 retry:
2211         sp_tgt = lmv_locate_tgt(lmv, op_data);
2212         if (IS_ERR(sp_tgt))
2213                 RETURN(PTR_ERR(sp_tgt));
2214
2215         /* cancel UPDATE locks of source parent */
2216         rc = lmv_early_cancel(exp, sp_tgt, op_data, tgt->ltd_index, LCK_EX,
2217                               MDS_INODELOCK_UPDATE, MF_MDC_CANCEL_FID1);
2218         if (rc != 0)
2219                 RETURN(rc);
2220
2221         if (fid_is_sane(&op_data->op_fid3)) {
2222                 /* cancel LOOKUP lock of source on source parent */
2223                 if (src_tgt != sp_tgt) {
2224                         rc = lmv_early_cancel(exp, sp_tgt, op_data,
2225                                               tgt->ltd_index, LCK_EX,
2226                                               MDS_INODELOCK_LOOKUP,
2227                                               MF_MDC_CANCEL_FID3);
2228                         if (rc != 0)
2229                                 RETURN(rc);
2230                 }
2231         }
2232
2233 rename:
2234         CDEBUG(D_INODE, "RENAME "DFID"/%.*s to "DFID"/%.*s\n",
2235                 PFID(&op_data->op_fid1), (int)oldlen, old,
2236                 PFID(&op_data->op_fid2), (int)newlen, new);
2237
2238         rc = md_rename(tgt->ltd_exp, op_data, old, oldlen, new, newlen,
2239                         request);
2240         if (rc == -ENOENT && lmv_dir_retry_check_update(op_data)) {
2241                 ptlrpc_req_finished(*request);
2242                 *request = NULL;
2243                 goto retry;
2244         }
2245
2246         if (rc && rc != -EXDEV)
2247                 RETURN(rc);
2248
2249         body = req_capsule_server_get(&(*request)->rq_pill, &RMF_MDT_BODY);
2250         if (body == NULL)
2251                 RETURN(-EPROTO);
2252
2253         /* Not cross-ref case, just get out of here. */
2254         if (likely(!(body->mbo_valid & OBD_MD_MDS)))
2255                 RETURN(rc);
2256
2257         op_data->op_fid4 = body->mbo_fid1;
2258
2259         ptlrpc_req_finished(*request);
2260         *request = NULL;
2261
2262         tgt = lmv_fid2tgt(lmv, &op_data->op_fid4);
2263         if (IS_ERR(tgt))
2264                 RETURN(PTR_ERR(tgt));
2265
2266         if (fid_is_sane(&op_data->op_fid4)) {
2267                 /* cancel LOOKUP lock of target on target parent */
2268                 if (tgt != tp_tgt) {
2269                         rc = lmv_early_cancel(exp, tp_tgt, op_data,
2270                                               tgt->ltd_index, LCK_EX,
2271                                               MDS_INODELOCK_LOOKUP,
2272                                               MF_MDC_CANCEL_FID4);
2273                         if (rc != 0)
2274                                 RETURN(rc);
2275                 }
2276         }
2277
2278         goto rename;
2279 }
2280
2281 static int lmv_setattr(struct obd_export *exp, struct md_op_data *op_data,
2282                        void *ea, size_t ealen, struct ptlrpc_request **request)
2283 {
2284         struct obd_device *obd = exp->exp_obd;
2285         struct lmv_obd *lmv = &obd->u.lmv;
2286         struct lmv_tgt_desc *tgt;
2287         int rc = 0;
2288
2289         ENTRY;
2290
2291         CDEBUG(D_INODE, "SETATTR for "DFID", valid 0x%x/0x%x\n",
2292                PFID(&op_data->op_fid1), op_data->op_attr.ia_valid,
2293                op_data->op_xvalid);
2294
2295         op_data->op_flags |= MF_MDC_CANCEL_FID1;
2296         tgt = lmv_fid2tgt(lmv, &op_data->op_fid1);
2297         if (IS_ERR(tgt))
2298                 RETURN(PTR_ERR(tgt));
2299
2300         rc = md_setattr(tgt->ltd_exp, op_data, ea, ealen, request);
2301
2302         RETURN(rc);
2303 }
2304
2305 static int lmv_fsync(struct obd_export *exp, const struct lu_fid *fid,
2306                      struct ptlrpc_request **request)
2307 {
2308         struct obd_device *obd = exp->exp_obd;
2309         struct lmv_obd *lmv = &obd->u.lmv;
2310         struct lmv_tgt_desc *tgt;
2311         int rc;
2312
2313         ENTRY;
2314
2315         tgt = lmv_fid2tgt(lmv, fid);
2316         if (IS_ERR(tgt))
2317                 RETURN(PTR_ERR(tgt));
2318
2319         rc = md_fsync(tgt->ltd_exp, fid, request);
2320         RETURN(rc);
2321 }
2322
2323 struct stripe_dirent {
2324         struct page             *sd_page;
2325         struct lu_dirpage       *sd_dp;
2326         struct lu_dirent        *sd_ent;
2327         bool                     sd_eof;
2328 };
2329
2330 struct lmv_dir_ctxt {
2331         struct lmv_obd          *ldc_lmv;
2332         struct md_op_data       *ldc_op_data;
2333         struct md_callback      *ldc_cb_op;
2334         __u64                    ldc_hash;
2335         int                      ldc_count;
2336         struct stripe_dirent     ldc_stripes[0];
2337 };
2338
2339 static inline void stripe_dirent_unload(struct stripe_dirent *stripe)
2340 {
2341         if (stripe->sd_page) {
2342                 kunmap(stripe->sd_page);
2343                 put_page(stripe->sd_page);
2344                 stripe->sd_page = NULL;
2345                 stripe->sd_ent = NULL;
2346         }
2347 }
2348
2349 static inline void put_lmv_dir_ctxt(struct lmv_dir_ctxt *ctxt)
2350 {
2351         int i;
2352
2353         for (i = 0; i < ctxt->ldc_count; i++)
2354                 stripe_dirent_unload(&ctxt->ldc_stripes[i]);
2355 }
2356
2357 /* if @ent is dummy, or . .., get next */
2358 static struct lu_dirent *stripe_dirent_get(struct lmv_dir_ctxt *ctxt,
2359                                            struct lu_dirent *ent,
2360                                            int stripe_index)
2361 {
2362         for (; ent; ent = lu_dirent_next(ent)) {
2363                 /* Skip dummy entry */
2364                 if (le16_to_cpu(ent->lde_namelen) == 0)
2365                         continue;
2366
2367                 /* skip . and .. for other stripes */
2368                 if (stripe_index &&
2369                     (strncmp(ent->lde_name, ".",
2370                              le16_to_cpu(ent->lde_namelen)) == 0 ||
2371                      strncmp(ent->lde_name, "..",
2372                              le16_to_cpu(ent->lde_namelen)) == 0))
2373                         continue;
2374
2375                 if (le64_to_cpu(ent->lde_hash) >= ctxt->ldc_hash)
2376                         break;
2377         }
2378
2379         return ent;
2380 }
2381
2382 static struct lu_dirent *stripe_dirent_load(struct lmv_dir_ctxt *ctxt,
2383                                             struct stripe_dirent *stripe,
2384                                             int stripe_index)
2385 {
2386         struct md_op_data *op_data = ctxt->ldc_op_data;
2387         struct lmv_oinfo *oinfo;
2388         struct lu_fid fid = op_data->op_fid1;
2389         struct inode *inode = op_data->op_data;
2390         struct lmv_tgt_desc *tgt;
2391         struct lu_dirent *ent = stripe->sd_ent;
2392         __u64 hash = ctxt->ldc_hash;
2393         int rc = 0;
2394
2395         ENTRY;
2396
2397         LASSERT(stripe == &ctxt->ldc_stripes[stripe_index]);
2398         LASSERT(!ent);
2399
2400         do {
2401                 if (stripe->sd_page) {
2402                         __u64 end = le64_to_cpu(stripe->sd_dp->ldp_hash_end);
2403
2404                         /* @hash should be the last dirent hash */
2405                         LASSERTF(hash <= end,
2406                                  "ctxt@%p stripe@%p hash %llx end %llx\n",
2407                                  ctxt, stripe, hash, end);
2408                         /* unload last page */
2409                         stripe_dirent_unload(stripe);
2410                         /* eof */
2411                         if (end == MDS_DIR_END_OFF) {
2412                                 stripe->sd_eof = true;
2413                                 break;
2414                         }
2415                         hash = end;
2416                 }
2417
2418                 oinfo = &op_data->op_mea1->lsm_md_oinfo[stripe_index];
2419                 if (!oinfo->lmo_root) {
2420                         rc = -ENOENT;
2421                         break;
2422                 }
2423
2424                 tgt = lmv_tgt(ctxt->ldc_lmv, oinfo->lmo_mds);
2425                 if (!tgt) {
2426                         rc = -ENODEV;
2427                         break;
2428                 }
2429
2430                 /* op_data is shared by stripes, reset after use */
2431                 op_data->op_fid1 = oinfo->lmo_fid;
2432                 op_data->op_fid2 = oinfo->lmo_fid;
2433                 op_data->op_data = oinfo->lmo_root;
2434
2435                 rc = md_read_page(tgt->ltd_exp, op_data, ctxt->ldc_cb_op, hash,
2436                                   &stripe->sd_page);
2437
2438                 op_data->op_fid1 = fid;
2439                 op_data->op_fid2 = fid;
2440                 op_data->op_data = inode;
2441
2442                 if (rc)
2443                         break;
2444
2445                 stripe->sd_dp = page_address(stripe->sd_page);
2446                 ent = stripe_dirent_get(ctxt, lu_dirent_start(stripe->sd_dp),
2447                                         stripe_index);
2448                 /* in case a page filled with ., .. and dummy, read next */
2449         } while (!ent);
2450
2451         stripe->sd_ent = ent;
2452         if (rc) {
2453                 LASSERT(!ent);
2454                 /* treat error as eof, so dir can be partially accessed */
2455                 stripe->sd_eof = true;
2456                 LCONSOLE_WARN("dir "DFID" stripe %d readdir failed: %d, "
2457                               "directory is partially accessed!\n",
2458                               PFID(&ctxt->ldc_op_data->op_fid1), stripe_index,
2459                               rc);
2460         }
2461
2462         RETURN(ent);
2463 }
2464
2465 static int lmv_file_resync(struct obd_export *exp, struct md_op_data *data)
2466 {
2467         struct obd_device *obd = exp->exp_obd;
2468         struct lmv_obd *lmv = &obd->u.lmv;
2469         struct lmv_tgt_desc *tgt;
2470         int rc;
2471
2472         ENTRY;
2473
2474         rc = lmv_check_connect(obd);
2475         if (rc != 0)
2476                 RETURN(rc);
2477
2478         tgt = lmv_fid2tgt(lmv, &data->op_fid1);
2479         if (IS_ERR(tgt))
2480                 RETURN(PTR_ERR(tgt));
2481
2482         data->op_flags |= MF_MDC_CANCEL_FID1;
2483         rc = md_file_resync(tgt->ltd_exp, data);
2484         RETURN(rc);
2485 }
2486
2487 /**
2488  * Get dirent with the closest hash for striped directory
2489  *
2490  * This function will search the dir entry, whose hash value is the
2491  * closest(>=) to hash from all of sub-stripes, and it is only being called
2492  * for striped directory.
2493  *
2494  * \param[in] ctxt              dir read context
2495  *
2496  * \retval                      dirent get the entry successfully
2497  *                              NULL does not get the entry, normally it means
2498  *                              it reaches the end of the directory, while read
2499  *                              stripe dirent error is ignored to allow partial
2500  *                              access.
2501  */
2502 static struct lu_dirent *lmv_dirent_next(struct lmv_dir_ctxt *ctxt)
2503 {
2504         struct stripe_dirent *stripe;
2505         struct lu_dirent *ent = NULL;
2506         int i;
2507         int min = -1;
2508
2509         /* TODO: optimize with k-way merge sort */
2510         for (i = 0; i < ctxt->ldc_count; i++) {
2511                 stripe = &ctxt->ldc_stripes[i];
2512                 if (stripe->sd_eof)
2513                         continue;
2514
2515                 if (!stripe->sd_ent) {
2516                         stripe_dirent_load(ctxt, stripe, i);
2517                         if (!stripe->sd_ent) {
2518                                 LASSERT(stripe->sd_eof);
2519                                 continue;
2520                         }
2521                 }
2522
2523                 if (min == -1 ||
2524                     le64_to_cpu(ctxt->ldc_stripes[min].sd_ent->lde_hash) >
2525                     le64_to_cpu(stripe->sd_ent->lde_hash)) {
2526                         min = i;
2527                         if (le64_to_cpu(stripe->sd_ent->lde_hash) ==
2528                             ctxt->ldc_hash)
2529                                 break;
2530                 }
2531         }
2532
2533         if (min != -1) {
2534                 stripe = &ctxt->ldc_stripes[min];
2535                 ent = stripe->sd_ent;
2536                 /* pop found dirent */
2537                 stripe->sd_ent = stripe_dirent_get(ctxt, lu_dirent_next(ent),
2538                                                    min);
2539         }
2540
2541         return ent;
2542 }
2543
2544 /**
2545  * Build dir entry page for striped directory
2546  *
2547  * This function gets one entry by @offset from a striped directory. It will
2548  * read entries from all of stripes, and choose one closest to the required
2549  * offset(&offset). A few notes
2550  * 1. skip . and .. for non-zero stripes, because there can only have one .
2551  * and .. in a directory.
2552  * 2. op_data will be shared by all of stripes, instead of allocating new
2553  * one, so need to restore before reusing.
2554  *
2555  * \param[in] exp       obd export refer to LMV
2556  * \param[in] op_data   hold those MD parameters of read_entry
2557  * \param[in] cb_op     ldlm callback being used in enqueue in mdc_read_entry
2558  * \param[in] offset    starting hash offset
2559  * \param[out] ppage    the page holding the entry. Note: because the entry
2560  *                      will be accessed in upper layer, so we need hold the
2561  *                      page until the usages of entry is finished, see
2562  *                      ll_dir_entry_next.
2563  *
2564  * retval               =0 if get entry successfully
2565  *                      <0 cannot get entry
2566  */
2567 static int lmv_striped_read_page(struct obd_export *exp,
2568                                  struct md_op_data *op_data,
2569                                  struct md_callback *cb_op,
2570                                  __u64 offset, struct page **ppage)
2571 {
2572         struct page *page = NULL;
2573         struct lu_dirpage *dp;
2574         void *start;
2575         struct lu_dirent *ent;
2576         struct lu_dirent *last_ent;
2577         int stripe_count;
2578         struct lmv_dir_ctxt *ctxt;
2579         struct lu_dirent *next = NULL;
2580         __u16 ent_size;
2581         size_t left_bytes;
2582         int rc = 0;
2583         ENTRY;
2584
2585         /* Allocate a page and read entries from all of stripes and fill
2586          * the page by hash order */
2587         page = alloc_page(GFP_KERNEL);
2588         if (!page)
2589                 RETURN(-ENOMEM);
2590
2591         /* Initialize the entry page */
2592         dp = kmap(page);
2593         memset(dp, 0, sizeof(*dp));
2594         dp->ldp_hash_start = cpu_to_le64(offset);
2595
2596         start = dp + 1;
2597         left_bytes = PAGE_SIZE - sizeof(*dp);
2598         ent = start;
2599         last_ent = ent;
2600
2601         /* initalize dir read context */
2602         stripe_count = op_data->op_mea1->lsm_md_stripe_count;
2603         OBD_ALLOC(ctxt, offsetof(typeof(*ctxt), ldc_stripes[stripe_count]));
2604         if (!ctxt)
2605                 GOTO(free_page, rc = -ENOMEM);
2606         ctxt->ldc_lmv = &exp->exp_obd->u.lmv;
2607         ctxt->ldc_op_data = op_data;
2608         ctxt->ldc_cb_op = cb_op;
2609         ctxt->ldc_hash = offset;
2610         ctxt->ldc_count = stripe_count;
2611
2612         while (1) {
2613                 next = lmv_dirent_next(ctxt);
2614
2615                 /* end of directory */
2616                 if (!next) {
2617                         ctxt->ldc_hash = MDS_DIR_END_OFF;
2618                         break;
2619                 }
2620                 ctxt->ldc_hash = le64_to_cpu(next->lde_hash);
2621
2622                 ent_size = le16_to_cpu(next->lde_reclen);
2623
2624                 /* the last entry lde_reclen is 0, but it might not be the last
2625                  * one of this temporay dir page */
2626                 if (!ent_size)
2627                         ent_size = lu_dirent_calc_size(
2628                                         le16_to_cpu(next->lde_namelen),
2629                                         le32_to_cpu(next->lde_attrs));
2630                 /* page full */
2631                 if (ent_size > left_bytes)
2632                         break;
2633
2634                 memcpy(ent, next, ent_size);
2635
2636                 /* Replace . with master FID and Replace .. with the parent FID
2637                  * of master object */
2638                 if (strncmp(ent->lde_name, ".",
2639                             le16_to_cpu(ent->lde_namelen)) == 0 &&
2640                     le16_to_cpu(ent->lde_namelen) == 1)
2641                         fid_cpu_to_le(&ent->lde_fid, &op_data->op_fid1);
2642                 else if (strncmp(ent->lde_name, "..",
2643                                    le16_to_cpu(ent->lde_namelen)) == 0 &&
2644                            le16_to_cpu(ent->lde_namelen) == 2)
2645                         fid_cpu_to_le(&ent->lde_fid, &op_data->op_fid3);
2646
2647                 CDEBUG(D_INODE, "entry %.*s hash %#llx\n",
2648                        le16_to_cpu(ent->lde_namelen), ent->lde_name,
2649                        le64_to_cpu(ent->lde_hash));
2650
2651                 left_bytes -= ent_size;
2652                 ent->lde_reclen = cpu_to_le16(ent_size);
2653                 last_ent = ent;
2654                 ent = (void *)ent + ent_size;
2655         };
2656
2657         last_ent->lde_reclen = 0;
2658
2659         if (ent == start)
2660                 dp->ldp_flags |= LDF_EMPTY;
2661         else if (ctxt->ldc_hash == le64_to_cpu(last_ent->lde_hash))
2662                 dp->ldp_flags |= LDF_COLLIDE;
2663         dp->ldp_flags = cpu_to_le32(dp->ldp_flags);
2664         dp->ldp_hash_end = cpu_to_le64(ctxt->ldc_hash);
2665
2666         put_lmv_dir_ctxt(ctxt);
2667         OBD_FREE(ctxt, offsetof(typeof(*ctxt), ldc_stripes[stripe_count]));
2668
2669         *ppage = page;
2670
2671         RETURN(0);
2672
2673 free_page:
2674         kunmap(page);
2675         __free_page(page);
2676
2677         return rc;
2678 }
2679
2680 int lmv_read_page(struct obd_export *exp, struct md_op_data *op_data,
2681                   struct md_callback *cb_op, __u64 offset,
2682                   struct page **ppage)
2683 {
2684         struct obd_device *obd = exp->exp_obd;
2685         struct lmv_obd *lmv = &obd->u.lmv;
2686         struct lmv_tgt_desc *tgt;
2687         int rc;
2688
2689         ENTRY;
2690
2691         if (unlikely(lmv_dir_foreign(op_data->op_mea1)))
2692                 RETURN(-ENODATA);
2693
2694         if (unlikely(lmv_dir_striped(op_data->op_mea1))) {
2695                 rc = lmv_striped_read_page(exp, op_data, cb_op, offset, ppage);
2696                 RETURN(rc);
2697         }
2698
2699         tgt = lmv_fid2tgt(lmv, &op_data->op_fid1);
2700         if (IS_ERR(tgt))
2701                 RETURN(PTR_ERR(tgt));
2702
2703         rc = md_read_page(tgt->ltd_exp, op_data, cb_op, offset, ppage);
2704
2705         RETURN(rc);
2706 }
2707
2708 /**
2709  * Unlink a file/directory
2710  *
2711  * Unlink a file or directory under the parent dir. The unlink request
2712  * usually will be sent to the MDT where the child is located, but if
2713  * the client does not have the child FID then request will be sent to the
2714  * MDT where the parent is located.
2715  *
2716  * If the parent is a striped directory then it also needs to locate which
2717  * stripe the name of the child is located, and replace the parent FID
2718  * (@op->op_fid1) with the stripe FID. Note: if the stripe is unknown,
2719  * it will walk through all of sub-stripes until the child is being
2720  * unlinked finally.
2721  *
2722  * \param[in] exp       export refer to LMV
2723  * \param[in] op_data   different parameters transferred beween client
2724  *                      MD stacks, name, namelen, FIDs etc.
2725  *                      op_fid1 is the parent FID, op_fid2 is the child
2726  *                      FID.
2727  * \param[out] request  point to the request of unlink.
2728  *
2729  * retval               0 if succeed
2730  *                      negative errno if failed.
2731  */
2732 static int lmv_unlink(struct obd_export *exp, struct md_op_data *op_data,
2733                       struct ptlrpc_request **request)
2734 {
2735         struct obd_device *obd = exp->exp_obd;
2736         struct lmv_obd *lmv = &obd->u.lmv;
2737         struct lmv_tgt_desc *tgt;
2738         struct lmv_tgt_desc *parent_tgt;
2739         struct mdt_body *body;
2740         int rc;
2741
2742         ENTRY;
2743
2744         op_data->op_fsuid = from_kuid(&init_user_ns, current_fsuid());
2745         op_data->op_fsgid = from_kgid(&init_user_ns, current_fsgid());
2746         op_data->op_cap = cfs_curproc_cap_pack();
2747
2748 retry:
2749         parent_tgt = lmv_locate_tgt(lmv, op_data);
2750         if (IS_ERR(parent_tgt))
2751                 RETURN(PTR_ERR(parent_tgt));
2752
2753         if (likely(!fid_is_zero(&op_data->op_fid2))) {
2754                 tgt = lmv_fid2tgt(lmv, &op_data->op_fid2);
2755                 if (IS_ERR(tgt))
2756                         RETURN(PTR_ERR(tgt));
2757         } else {
2758                 tgt = parent_tgt;
2759         }
2760
2761         /*
2762          * If child's fid is given, cancel unused locks for it if it is from
2763          * another export than parent.
2764          *
2765          * LOOKUP lock for child (fid3) should also be cancelled on parent
2766          * tgt_tgt in mdc_unlink().
2767          */
2768         op_data->op_flags |= MF_MDC_CANCEL_FID1 | MF_MDC_CANCEL_FID3;
2769
2770         if (parent_tgt != tgt)
2771                 rc = lmv_early_cancel(exp, parent_tgt, op_data, tgt->ltd_index,
2772                                       LCK_EX, MDS_INODELOCK_LOOKUP,
2773                                       MF_MDC_CANCEL_FID3);
2774
2775         rc = lmv_early_cancel(exp, NULL, op_data, tgt->ltd_index, LCK_EX,
2776                               MDS_INODELOCK_ELC, MF_MDC_CANCEL_FID3);
2777         if (rc)
2778                 RETURN(rc);
2779
2780         CDEBUG(D_INODE, "unlink with fid="DFID"/"DFID" -> mds #%u\n",
2781                PFID(&op_data->op_fid1), PFID(&op_data->op_fid2),
2782                tgt->ltd_index);
2783
2784         rc = md_unlink(tgt->ltd_exp, op_data, request);
2785         if (rc == -ENOENT && lmv_dir_retry_check_update(op_data)) {
2786                 ptlrpc_req_finished(*request);
2787                 *request = NULL;
2788                 goto retry;
2789         }
2790
2791         if (rc != -EREMOTE)
2792                 RETURN(rc);
2793
2794         body = req_capsule_server_get(&(*request)->rq_pill, &RMF_MDT_BODY);
2795         if (body == NULL)
2796                 RETURN(-EPROTO);
2797
2798         /* Not cross-ref case, just get out of here. */
2799         if (likely(!(body->mbo_valid & OBD_MD_MDS)))
2800                 RETURN(rc);
2801
2802         /* This is a remote object, try remote MDT. */
2803         op_data->op_fid2 = body->mbo_fid1;
2804         ptlrpc_req_finished(*request);
2805         *request = NULL;
2806
2807         tgt = lmv_fid2tgt(lmv, &op_data->op_fid2);
2808         if (IS_ERR(tgt))
2809                 RETURN(PTR_ERR(tgt));
2810
2811         goto retry;
2812 }
2813
2814 static int lmv_precleanup(struct obd_device *obd)
2815 {
2816         ENTRY;
2817         libcfs_kkuc_group_rem(&obd->obd_uuid, 0, KUC_GRP_HSM);
2818         fld_client_debugfs_fini(&obd->u.lmv.lmv_fld);
2819         lprocfs_obd_cleanup(obd);
2820         lprocfs_free_md_stats(obd);
2821         RETURN(0);
2822 }
2823
2824 /**
2825  * Get by key a value associated with a LMV device.
2826  *
2827  * Dispatch request to lower-layer devices as needed.
2828  *
2829  * \param[in] env               execution environment for this thread
2830  * \param[in] exp               export for the LMV device
2831  * \param[in] keylen            length of key identifier
2832  * \param[in] key               identifier of key to get value for
2833  * \param[in] vallen            size of \a val
2834  * \param[out] val              pointer to storage location for value
2835  * \param[in] lsm               optional striping metadata of object
2836  *
2837  * \retval 0            on success
2838  * \retval negative     negated errno on failure
2839  */
2840 static int lmv_get_info(const struct lu_env *env, struct obd_export *exp,
2841                         __u32 keylen, void *key, __u32 *vallen, void *val)
2842 {
2843         struct obd_device *obd;
2844         struct lmv_obd *lmv;
2845         struct lu_tgt_desc *tgt;
2846         int rc = 0;
2847
2848         ENTRY;
2849
2850         obd = class_exp2obd(exp);
2851         if (obd == NULL) {
2852                 CDEBUG(D_IOCTL, "Invalid client cookie %#llx\n",
2853                        exp->exp_handle.h_cookie);
2854                 RETURN(-EINVAL);
2855         }
2856
2857         lmv = &obd->u.lmv;
2858         if (keylen >= strlen("remote_flag") && !strcmp(key, "remote_flag")) {
2859                 LASSERT(*vallen == sizeof(__u32));
2860                 lmv_foreach_connected_tgt(lmv, tgt) {
2861                         if (!obd_get_info(env, tgt->ltd_exp, keylen, key,
2862                                           vallen, val))
2863                                 RETURN(0);
2864                 }
2865                 RETURN(-EINVAL);
2866         } else if (KEY_IS(KEY_MAX_EASIZE) ||
2867                    KEY_IS(KEY_DEFAULT_EASIZE) ||
2868                    KEY_IS(KEY_CONN_DATA)) {
2869                 /*
2870                  * Forwarding this request to first MDS, it should know LOV
2871                  * desc.
2872                  */
2873                 tgt = lmv_tgt(lmv, 0);
2874                 if (!tgt)
2875                         RETURN(-ENODEV);
2876
2877                 rc = obd_get_info(env, tgt->ltd_exp, keylen, key, vallen, val);
2878                 if (!rc && KEY_IS(KEY_CONN_DATA))
2879                         exp->exp_connect_data = *(struct obd_connect_data *)val;
2880                 RETURN(rc);
2881         } else if (KEY_IS(KEY_TGT_COUNT)) {
2882                 *((int *)val) = lmv->desc.ld_tgt_count;
2883                 RETURN(0);
2884         }
2885
2886         CDEBUG(D_IOCTL, "Invalid key\n");
2887         RETURN(-EINVAL);
2888 }
2889
2890 static int lmv_rmfid(struct obd_export *exp, struct fid_array *fa,
2891                      int *__rcs, struct ptlrpc_request_set *_set)
2892 {
2893         struct obd_device *obddev = class_exp2obd(exp);
2894         struct ptlrpc_request_set *set = _set;
2895         struct lmv_obd *lmv = &obddev->u.lmv;
2896         int tgt_count = lmv->desc.ld_tgt_count;
2897         struct lu_tgt_desc *tgt;
2898         struct fid_array *fat, **fas = NULL;
2899         int i, rc, **rcs = NULL;
2900
2901         if (!set) {
2902                 set = ptlrpc_prep_set();
2903                 if (!set)
2904                         RETURN(-ENOMEM);
2905         }
2906
2907         /* split FIDs by targets */
2908         OBD_ALLOC(fas, sizeof(fas) * tgt_count);
2909         if (fas == NULL)
2910                 GOTO(out, rc = -ENOMEM);
2911         OBD_ALLOC(rcs, sizeof(int *) * tgt_count);
2912         if (rcs == NULL)
2913                 GOTO(out_fas, rc = -ENOMEM);
2914
2915         for (i = 0; i < fa->fa_nr; i++) {
2916                 unsigned int idx;
2917
2918                 rc = lmv_fld_lookup(lmv, &fa->fa_fids[i], &idx);
2919                 if (rc) {
2920                         CDEBUG(D_OTHER, "can't lookup "DFID": rc = %d\n",
2921                                PFID(&fa->fa_fids[i]), rc);
2922                         continue;
2923                 }
2924                 LASSERT(idx < tgt_count);
2925                 if (!fas[idx])
2926                         OBD_ALLOC(fas[idx], offsetof(struct fid_array,
2927                                   fa_fids[fa->fa_nr]));
2928                 if (!fas[idx])
2929                         GOTO(out, rc = -ENOMEM);
2930                 if (!rcs[idx])
2931                         OBD_ALLOC(rcs[idx], sizeof(int) * fa->fa_nr);
2932                 if (!rcs[idx])
2933                         GOTO(out, rc = -ENOMEM);
2934
2935                 fat = fas[idx];
2936                 fat->fa_fids[fat->fa_nr++] = fa->fa_fids[i];
2937         }
2938
2939         lmv_foreach_connected_tgt(lmv, tgt) {
2940                 fat = fas[tgt->ltd_index];
2941                 if (!fat || fat->fa_nr == 0)
2942                         continue;
2943                 rc = md_rmfid(tgt->ltd_exp, fat, rcs[tgt->ltd_index], set);
2944         }
2945
2946         rc = ptlrpc_set_wait(NULL, set);
2947         if (rc == 0) {
2948                 int j = 0;
2949                 for (i = 0; i < tgt_count; i++) {
2950                         fat = fas[i];
2951                         if (!fat || fat->fa_nr == 0)
2952                                 continue;
2953                         /* copy FIDs back */
2954                         memcpy(fa->fa_fids + j, fat->fa_fids,
2955                                fat->fa_nr * sizeof(struct lu_fid));
2956                         /* copy rcs back */
2957                         memcpy(__rcs + j, rcs[i], fat->fa_nr * sizeof(**rcs));
2958                         j += fat->fa_nr;
2959                 }
2960         }
2961         if (set != _set)
2962                 ptlrpc_set_destroy(set);
2963
2964 out:
2965         for (i = 0; i < tgt_count; i++) {
2966                 if (fas && fas[i])
2967                         OBD_FREE(fas[i], offsetof(struct fid_array,
2968                                                 fa_fids[fa->fa_nr]));
2969                 if (rcs && rcs[i])
2970                         OBD_FREE(rcs[i], sizeof(int) * fa->fa_nr);
2971         }
2972         if (rcs)
2973                 OBD_FREE(rcs, sizeof(int *) * tgt_count);
2974 out_fas:
2975         if (fas)
2976                 OBD_FREE(fas, sizeof(fas) * tgt_count);
2977
2978         RETURN(rc);
2979 }
2980
2981 /**
2982  * Asynchronously set by key a value associated with a LMV device.
2983  *
2984  * Dispatch request to lower-layer devices as needed.
2985  *
2986  * \param[in] env       execution environment for this thread
2987  * \param[in] exp       export for the LMV device
2988  * \param[in] keylen    length of key identifier
2989  * \param[in] key       identifier of key to store value for
2990  * \param[in] vallen    size of value to store
2991  * \param[in] val       pointer to data to be stored
2992  * \param[in] set       optional list of related ptlrpc requests
2993  *
2994  * \retval 0            on success
2995  * \retval negative     negated errno on failure
2996  */
2997 int lmv_set_info_async(const struct lu_env *env, struct obd_export *exp,
2998                         __u32 keylen, void *key, __u32 vallen, void *val,
2999                         struct ptlrpc_request_set *set)
3000 {
3001         struct lmv_tgt_desc     *tgt = NULL;
3002         struct obd_device       *obd;
3003         struct lmv_obd          *lmv;
3004         int rc = 0;
3005         ENTRY;
3006
3007         obd = class_exp2obd(exp);
3008         if (obd == NULL) {
3009                 CDEBUG(D_IOCTL, "Invalid client cookie %#llx\n",
3010                        exp->exp_handle.h_cookie);
3011                 RETURN(-EINVAL);
3012         }
3013         lmv = &obd->u.lmv;
3014
3015         if (KEY_IS(KEY_READ_ONLY) || KEY_IS(KEY_FLUSH_CTX) ||
3016             KEY_IS(KEY_DEFAULT_EASIZE)) {
3017                 int err = 0;
3018
3019                 lmv_foreach_connected_tgt(lmv, tgt) {
3020                         err = obd_set_info_async(env, tgt->ltd_exp,
3021                                                  keylen, key, vallen, val, set);
3022                         if (err && rc == 0)
3023                                 rc = err;
3024                 }
3025
3026                 RETURN(rc);
3027         }
3028
3029         RETURN(-EINVAL);
3030 }
3031
3032 static int lmv_unpack_md_v1(struct obd_export *exp, struct lmv_stripe_md *lsm,
3033                             const struct lmv_mds_md_v1 *lmm1)
3034 {
3035         struct lmv_obd  *lmv = &exp->exp_obd->u.lmv;
3036         int             stripe_count;
3037         int             cplen;
3038         int             i;
3039         int             rc = 0;
3040         ENTRY;
3041
3042         lsm->lsm_md_magic = le32_to_cpu(lmm1->lmv_magic);
3043         lsm->lsm_md_stripe_count = le32_to_cpu(lmm1->lmv_stripe_count);
3044         lsm->lsm_md_master_mdt_index = le32_to_cpu(lmm1->lmv_master_mdt_index);
3045         if (OBD_FAIL_CHECK(OBD_FAIL_UNKNOWN_LMV_STRIPE))
3046                 lsm->lsm_md_hash_type = LMV_HASH_TYPE_UNKNOWN;
3047         else
3048                 lsm->lsm_md_hash_type = le32_to_cpu(lmm1->lmv_hash_type);
3049         lsm->lsm_md_layout_version = le32_to_cpu(lmm1->lmv_layout_version);
3050         lsm->lsm_md_migrate_offset = le32_to_cpu(lmm1->lmv_migrate_offset);
3051         lsm->lsm_md_migrate_hash = le32_to_cpu(lmm1->lmv_migrate_hash);
3052         cplen = strlcpy(lsm->lsm_md_pool_name, lmm1->lmv_pool_name,
3053                         sizeof(lsm->lsm_md_pool_name));
3054
3055         if (cplen >= sizeof(lsm->lsm_md_pool_name))
3056                 RETURN(-E2BIG);
3057
3058         CDEBUG(D_INFO, "unpack lsm count %d, master %d hash_type %#x "
3059                "layout_version %d\n", lsm->lsm_md_stripe_count,
3060                lsm->lsm_md_master_mdt_index, lsm->lsm_md_hash_type,
3061                lsm->lsm_md_layout_version);
3062
3063         stripe_count = le32_to_cpu(lmm1->lmv_stripe_count);
3064         for (i = 0; i < stripe_count; i++) {
3065                 fid_le_to_cpu(&lsm->lsm_md_oinfo[i].lmo_fid,
3066                               &lmm1->lmv_stripe_fids[i]);
3067                 /*
3068                  * set default value -1, so lmv_locate_tgt() knows this stripe
3069                  * target is not initialized.
3070                  */
3071                 lsm->lsm_md_oinfo[i].lmo_mds = (u32)-1;
3072                 if (!fid_is_sane(&lsm->lsm_md_oinfo[i].lmo_fid))
3073                         continue;
3074
3075                 rc = lmv_fld_lookup(lmv, &lsm->lsm_md_oinfo[i].lmo_fid,
3076                                     &lsm->lsm_md_oinfo[i].lmo_mds);
3077                 if (rc == -ENOENT)
3078                         continue;
3079
3080                 if (rc)
3081                         RETURN(rc);
3082
3083                 CDEBUG(D_INFO, "unpack fid #%d "DFID"\n", i,
3084                        PFID(&lsm->lsm_md_oinfo[i].lmo_fid));
3085         }
3086
3087         RETURN(rc);
3088 }
3089
3090 static inline int lmv_unpack_user_md(struct obd_export *exp,
3091                                      struct lmv_stripe_md *lsm,
3092                                      const struct lmv_user_md *lmu)
3093 {
3094         lsm->lsm_md_magic = le32_to_cpu(lmu->lum_magic);
3095         lsm->lsm_md_stripe_count = le32_to_cpu(lmu->lum_stripe_count);
3096         lsm->lsm_md_master_mdt_index = le32_to_cpu(lmu->lum_stripe_offset);
3097         lsm->lsm_md_hash_type = le32_to_cpu(lmu->lum_hash_type);
3098
3099         return 0;
3100 }
3101
3102 static int lmv_unpackmd(struct obd_export *exp, struct lmv_stripe_md **lsmp,
3103                         const union lmv_mds_md *lmm, size_t lmm_size)
3104 {
3105         struct lmv_stripe_md     *lsm;
3106         int                      lsm_size;
3107         int                      rc;
3108         bool                     allocated = false;
3109         ENTRY;
3110
3111         LASSERT(lsmp != NULL);
3112
3113         lsm = *lsmp;
3114         /* Free memmd */
3115         if (lsm != NULL && lmm == NULL) {
3116                 int i;
3117                 struct lmv_foreign_md *lfm = (struct lmv_foreign_md *)lsm;
3118
3119                 if (lfm->lfm_magic == LMV_MAGIC_FOREIGN) {
3120                         size_t lfm_size;
3121
3122                         lfm_size = lfm->lfm_length + offsetof(typeof(*lfm),
3123                                                               lfm_value[0]);
3124                         OBD_FREE_LARGE(lfm, lfm_size);
3125                         RETURN(0);
3126                 }
3127
3128                 if (lmv_dir_striped(lsm)) {
3129                         for (i = 0; i < lsm->lsm_md_stripe_count; i++) {
3130                                 if (lsm->lsm_md_oinfo[i].lmo_root)
3131                                         iput(lsm->lsm_md_oinfo[i].lmo_root);
3132                         }
3133                         lsm_size = lmv_stripe_md_size(lsm->lsm_md_stripe_count);
3134                 } else {
3135                         lsm_size = lmv_stripe_md_size(0);
3136                 }
3137                 OBD_FREE(lsm, lsm_size);
3138                 *lsmp = NULL;
3139                 RETURN(0);
3140         }
3141
3142         /* foreign lmv case */
3143         if (le32_to_cpu(lmm->lmv_magic) == LMV_MAGIC_FOREIGN) {
3144                 struct lmv_foreign_md *lfm = (struct lmv_foreign_md *)lsm;
3145
3146                 if (lfm == NULL) {
3147                         OBD_ALLOC_LARGE(lfm, lmm_size);
3148                         if (lfm == NULL)
3149                                 RETURN(-ENOMEM);
3150                         *lsmp = (struct lmv_stripe_md *)lfm;
3151                 }
3152                 lfm->lfm_magic = le32_to_cpu(lmm->lmv_foreign_md.lfm_magic);
3153                 lfm->lfm_length = le32_to_cpu(lmm->lmv_foreign_md.lfm_length);
3154                 lfm->lfm_type = le32_to_cpu(lmm->lmv_foreign_md.lfm_type);
3155                 lfm->lfm_flags = le32_to_cpu(lmm->lmv_foreign_md.lfm_flags);
3156                 memcpy(&lfm->lfm_value, &lmm->lmv_foreign_md.lfm_value,
3157                        lfm->lfm_length);
3158                 RETURN(lmm_size);
3159         }
3160
3161         if (le32_to_cpu(lmm->lmv_magic) == LMV_MAGIC_STRIPE)
3162                 RETURN(-EPERM);
3163
3164         /* Unpack memmd */
3165         if (le32_to_cpu(lmm->lmv_magic) != LMV_MAGIC_V1 &&
3166             le32_to_cpu(lmm->lmv_magic) != LMV_USER_MAGIC) {
3167                 CERROR("%s: invalid lmv magic %x: rc = %d\n",
3168                        exp->exp_obd->obd_name, le32_to_cpu(lmm->lmv_magic),
3169                        -EIO);
3170                 RETURN(-EIO);
3171         }
3172
3173         if (le32_to_cpu(lmm->lmv_magic) == LMV_MAGIC_V1)
3174                 lsm_size = lmv_stripe_md_size(lmv_mds_md_stripe_count_get(lmm));
3175         else
3176                 /**
3177                  * Unpack default dirstripe(lmv_user_md) to lmv_stripe_md,
3178                  * stripecount should be 0 then.
3179                  */
3180                 lsm_size = lmv_stripe_md_size(0);
3181
3182         if (lsm == NULL) {
3183                 OBD_ALLOC(lsm, lsm_size);
3184                 if (lsm == NULL)
3185                         RETURN(-ENOMEM);
3186                 allocated = true;
3187                 *lsmp = lsm;
3188         }
3189
3190         switch (le32_to_cpu(lmm->lmv_magic)) {
3191         case LMV_MAGIC_V1:
3192                 rc = lmv_unpack_md_v1(exp, lsm, &lmm->lmv_md_v1);
3193                 break;
3194         case LMV_USER_MAGIC:
3195                 rc = lmv_unpack_user_md(exp, lsm, &lmm->lmv_user_md);
3196                 break;
3197         default:
3198                 CERROR("%s: unrecognized magic %x\n", exp->exp_obd->obd_name,
3199                        le32_to_cpu(lmm->lmv_magic));
3200                 rc = -EINVAL;
3201                 break;
3202         }
3203
3204         if (rc != 0 && allocated) {
3205                 OBD_FREE(lsm, lsm_size);
3206                 *lsmp = NULL;
3207                 lsm_size = rc;
3208         }
3209         RETURN(lsm_size);
3210 }
3211
3212 void lmv_free_memmd(struct lmv_stripe_md *lsm)
3213 {
3214         lmv_unpackmd(NULL, &lsm, NULL, 0);
3215 }
3216 EXPORT_SYMBOL(lmv_free_memmd);
3217
3218 static int lmv_cancel_unused(struct obd_export *exp, const struct lu_fid *fid,
3219                              union ldlm_policy_data *policy,
3220                              enum ldlm_mode mode, enum ldlm_cancel_flags flags,
3221                              void *opaque)
3222 {
3223         struct lmv_obd *lmv = &exp->exp_obd->u.lmv;
3224         struct lu_tgt_desc *tgt;
3225         int err;
3226         int rc = 0;
3227
3228         ENTRY;
3229
3230         LASSERT(fid != NULL);
3231
3232         lmv_foreach_connected_tgt(lmv, tgt) {
3233                 if (!tgt->ltd_active)
3234                         continue;
3235
3236                 err = md_cancel_unused(tgt->ltd_exp, fid, policy, mode, flags,
3237                                        opaque);
3238                 if (!rc)
3239                         rc = err;
3240         }
3241         RETURN(rc);
3242 }
3243
3244 static int lmv_set_lock_data(struct obd_export *exp,
3245                              const struct lustre_handle *lockh,
3246                              void *data, __u64 *bits)
3247 {
3248         struct lmv_obd *lmv = &exp->exp_obd->u.lmv;
3249         struct lmv_tgt_desc *tgt = lmv_tgt(lmv, 0);
3250         int rc;
3251
3252         ENTRY;
3253
3254         if (tgt == NULL || tgt->ltd_exp == NULL)
3255                 RETURN(-EINVAL);
3256         rc =  md_set_lock_data(tgt->ltd_exp, lockh, data, bits);
3257         RETURN(rc);
3258 }
3259
3260 enum ldlm_mode lmv_lock_match(struct obd_export *exp, __u64 flags,
3261                               const struct lu_fid *fid, enum ldlm_type type,
3262                               union ldlm_policy_data *policy,
3263                               enum ldlm_mode mode, struct lustre_handle *lockh)
3264 {
3265         struct obd_device *obd = exp->exp_obd;
3266         struct lmv_obd *lmv = &obd->u.lmv;
3267         enum ldlm_mode rc;
3268         struct lu_tgt_desc *tgt;
3269         int i;
3270         int index;
3271
3272         ENTRY;
3273
3274         CDEBUG(D_INODE, "Lock match for "DFID"\n", PFID(fid));
3275
3276         /*
3277          * With DNE every object can have two locks in different namespaces:
3278          * lookup lock in space of MDT storing direntry and update/open lock in
3279          * space of MDT storing inode.  Try the MDT that the FID maps to first,
3280          * since this can be easily found, and only try others if that fails.
3281          */
3282         for (i = 0, index = lmv_fid2tgt_index(lmv, fid);
3283              i < lmv->desc.ld_tgt_count;
3284              i++, index = (index + 1) % lmv->desc.ld_tgt_count) {
3285                 if (index < 0) {
3286                         CDEBUG(D_HA, "%s: "DFID" is inaccessible: rc = %d\n",
3287                                obd->obd_name, PFID(fid), index);
3288                         index = 0;
3289                 }
3290
3291                 tgt = lmv_tgt(lmv, index);
3292                 if (!tgt || !tgt->ltd_exp || !tgt->ltd_active)
3293                         continue;
3294
3295                 rc = md_lock_match(tgt->ltd_exp, flags, fid, type, policy, mode,
3296                                    lockh);
3297                 if (rc)
3298                         RETURN(rc);
3299         }
3300
3301         RETURN(0);
3302 }
3303
3304 int lmv_get_lustre_md(struct obd_export *exp, struct ptlrpc_request *req,
3305                       struct obd_export *dt_exp, struct obd_export *md_exp,
3306                       struct lustre_md *md)
3307 {
3308         struct lmv_obd *lmv = &exp->exp_obd->u.lmv;
3309         struct lmv_tgt_desc *tgt = lmv_tgt(lmv, 0);
3310
3311         if (!tgt || !tgt->ltd_exp)
3312                 return -EINVAL;
3313
3314         return md_get_lustre_md(tgt->ltd_exp, req, dt_exp, md_exp, md);
3315 }
3316
3317 int lmv_free_lustre_md(struct obd_export *exp, struct lustre_md *md)
3318 {
3319         struct obd_device *obd = exp->exp_obd;
3320         struct lmv_obd *lmv = &obd->u.lmv;
3321         struct lmv_tgt_desc *tgt = lmv_tgt(lmv, 0);
3322
3323         ENTRY;
3324
3325         if (md->default_lmv) {
3326                 lmv_free_memmd(md->default_lmv);
3327                 md->default_lmv = NULL;
3328         }
3329         if (md->lmv != NULL) {
3330                 lmv_free_memmd(md->lmv);
3331                 md->lmv = NULL;
3332         }
3333         if (!tgt || !tgt->ltd_exp)
3334                 RETURN(-EINVAL);
3335         RETURN(md_free_lustre_md(tgt->ltd_exp, md));
3336 }
3337
3338 int lmv_set_open_replay_data(struct obd_export *exp,
3339                              struct obd_client_handle *och,
3340                              struct lookup_intent *it)
3341 {
3342         struct obd_device *obd = exp->exp_obd;
3343         struct lmv_obd *lmv = &obd->u.lmv;
3344         struct lmv_tgt_desc *tgt;
3345
3346         ENTRY;
3347
3348         tgt = lmv_fid2tgt(lmv, &och->och_fid);
3349         if (IS_ERR(tgt))
3350                 RETURN(PTR_ERR(tgt));
3351
3352         RETURN(md_set_open_replay_data(tgt->ltd_exp, och, it));
3353 }
3354
3355 int lmv_clear_open_replay_data(struct obd_export *exp,
3356                                struct obd_client_handle *och)
3357 {
3358         struct obd_device *obd = exp->exp_obd;
3359         struct lmv_obd *lmv = &obd->u.lmv;
3360         struct lmv_tgt_desc *tgt;
3361
3362         ENTRY;
3363
3364         tgt = lmv_fid2tgt(lmv, &och->och_fid);
3365         if (IS_ERR(tgt))
3366                 RETURN(PTR_ERR(tgt));
3367
3368         RETURN(md_clear_open_replay_data(tgt->ltd_exp, och));
3369 }
3370
3371 int lmv_intent_getattr_async(struct obd_export *exp,
3372                              struct md_enqueue_info *minfo)
3373 {
3374         struct md_op_data *op_data = &minfo->mi_data;
3375         struct obd_device *obd = exp->exp_obd;
3376         struct lmv_obd *lmv = &obd->u.lmv;
3377         struct lmv_tgt_desc *ptgt;
3378         struct lmv_tgt_desc *ctgt;
3379         int rc;
3380
3381         ENTRY;
3382
3383         if (!fid_is_sane(&op_data->op_fid2))
3384                 RETURN(-EINVAL);
3385
3386         ptgt = lmv_locate_tgt(lmv, op_data);
3387         if (IS_ERR(ptgt))
3388                 RETURN(PTR_ERR(ptgt));
3389
3390         ctgt = lmv_fid2tgt(lmv, &op_data->op_fid1);
3391         if (IS_ERR(ctgt))
3392                 RETURN(PTR_ERR(ctgt));
3393
3394         /*
3395          * remote object needs two RPCs to lookup and getattr, considering the
3396          * complexity don't support statahead for now.
3397          */
3398         if (ctgt != ptgt)
3399                 RETURN(-EREMOTE);
3400
3401         rc = md_intent_getattr_async(ptgt->ltd_exp, minfo);
3402
3403         RETURN(rc);
3404 }
3405
3406 int lmv_revalidate_lock(struct obd_export *exp, struct lookup_intent *it,
3407                         struct lu_fid *fid, __u64 *bits)
3408 {
3409         struct obd_device *obd = exp->exp_obd;
3410         struct lmv_obd *lmv = &obd->u.lmv;
3411         struct lmv_tgt_desc *tgt;
3412         int rc;
3413
3414         ENTRY;
3415
3416         tgt = lmv_fid2tgt(lmv, fid);
3417         if (IS_ERR(tgt))
3418                 RETURN(PTR_ERR(tgt));
3419
3420         rc = md_revalidate_lock(tgt->ltd_exp, it, fid, bits);
3421         RETURN(rc);
3422 }
3423
3424 int lmv_get_fid_from_lsm(struct obd_export *exp,
3425                          const struct lmv_stripe_md *lsm,
3426                          const char *name, int namelen, struct lu_fid *fid)
3427 {
3428         const struct lmv_oinfo *oinfo;
3429
3430         LASSERT(lmv_dir_striped(lsm));
3431
3432         oinfo = lsm_name_to_stripe_info(lsm, name, namelen, false);
3433         if (IS_ERR(oinfo))
3434                 return PTR_ERR(oinfo);
3435
3436         *fid = oinfo->lmo_fid;
3437
3438         RETURN(0);
3439 }
3440
3441 /**
3442  * For lmv, only need to send request to master MDT, and the master MDT will
3443  * process with other slave MDTs. The only exception is Q_GETOQUOTA for which
3444  * we directly fetch data from the slave MDTs.
3445  */
3446 int lmv_quotactl(struct obd_device *unused, struct obd_export *exp,
3447                  struct obd_quotactl *oqctl)
3448 {
3449         struct obd_device *obd = class_exp2obd(exp);
3450         struct lmv_obd *lmv = &obd->u.lmv;
3451         struct lmv_tgt_desc *tgt = lmv_tgt(lmv, 0);
3452         __u64 curspace, curinodes;
3453         int rc = 0;
3454
3455         ENTRY;
3456
3457         if (!tgt || !tgt->ltd_exp || !tgt->ltd_active) {
3458                 CERROR("master lmv inactive\n");
3459                 RETURN(-EIO);
3460         }
3461
3462         if (oqctl->qc_cmd != Q_GETOQUOTA) {
3463                 rc = obd_quotactl(tgt->ltd_exp, oqctl);
3464                 RETURN(rc);
3465         }
3466
3467         curspace = curinodes = 0;
3468         lmv_foreach_connected_tgt(lmv, tgt) {
3469                 int err;
3470
3471                 if (!tgt->ltd_active)
3472                         continue;
3473
3474                 err = obd_quotactl(tgt->ltd_exp, oqctl);
3475                 if (err) {
3476                         CERROR("getquota on mdt %d failed. %d\n",
3477                                tgt->ltd_index, err);
3478                         if (!rc)
3479                                 rc = err;
3480                 } else {
3481                         curspace += oqctl->qc_dqblk.dqb_curspace;
3482                         curinodes += oqctl->qc_dqblk.dqb_curinodes;
3483                 }
3484         }
3485         oqctl->qc_dqblk.dqb_curspace = curspace;
3486         oqctl->qc_dqblk.dqb_curinodes = curinodes;
3487
3488         RETURN(rc);
3489 }
3490
3491 static int lmv_merge_attr(struct obd_export *exp,
3492                           const struct lmv_stripe_md *lsm,
3493                           struct cl_attr *attr,
3494                           ldlm_blocking_callback cb_blocking)
3495 {
3496         int rc;
3497         int i;
3498
3499         if (!lmv_dir_striped(lsm))
3500                 return 0;
3501
3502         rc = lmv_revalidate_slaves(exp, lsm, cb_blocking, 0);
3503         if (rc < 0)
3504                 return rc;
3505
3506         for (i = 0; i < lsm->lsm_md_stripe_count; i++) {
3507                 struct inode *inode = lsm->lsm_md_oinfo[i].lmo_root;
3508
3509                 if (!inode)
3510                         continue;
3511
3512                 CDEBUG(D_INFO,
3513                        "" DFID " size %llu, blocks %llu nlink %u, atime %lld ctime %lld, mtime %lld.\n",
3514                        PFID(&lsm->lsm_md_oinfo[i].lmo_fid),
3515                        i_size_read(inode), (unsigned long long)inode->i_blocks,
3516                        inode->i_nlink, (s64)inode->i_atime.tv_sec,
3517                        (s64)inode->i_ctime.tv_sec, (s64)inode->i_mtime.tv_sec);
3518
3519                 /* for slave stripe, it needs to subtract nlink for . and .. */
3520                 if (i != 0)
3521                         attr->cat_nlink += inode->i_nlink - 2;
3522                 else
3523                         attr->cat_nlink = inode->i_nlink;
3524
3525                 attr->cat_size += i_size_read(inode);
3526                 attr->cat_blocks += inode->i_blocks;
3527
3528                 if (attr->cat_atime < inode->i_atime.tv_sec)
3529                         attr->cat_atime = inode->i_atime.tv_sec;
3530
3531                 if (attr->cat_ctime < inode->i_ctime.tv_sec)
3532                         attr->cat_ctime = inode->i_ctime.tv_sec;
3533
3534                 if (attr->cat_mtime < inode->i_mtime.tv_sec)
3535                         attr->cat_mtime = inode->i_mtime.tv_sec;
3536         }
3537         return 0;
3538 }
3539
3540 struct obd_ops lmv_obd_ops = {
3541         .o_owner                = THIS_MODULE,
3542         .o_setup                = lmv_setup,
3543         .o_cleanup              = lmv_cleanup,
3544         .o_precleanup           = lmv_precleanup,
3545         .o_process_config       = lmv_process_config,
3546         .o_connect              = lmv_connect,
3547         .o_disconnect           = lmv_disconnect,
3548         .o_statfs               = lmv_statfs,
3549         .o_get_info             = lmv_get_info,
3550         .o_set_info_async       = lmv_set_info_async,
3551         .o_notify               = lmv_notify,
3552         .o_get_uuid             = lmv_get_uuid,
3553         .o_fid_alloc            = lmv_fid_alloc,
3554         .o_iocontrol            = lmv_iocontrol,
3555         .o_quotactl             = lmv_quotactl
3556 };
3557
3558 struct md_ops lmv_md_ops = {
3559         .m_get_root             = lmv_get_root,
3560         .m_null_inode           = lmv_null_inode,
3561         .m_close                = lmv_close,
3562         .m_create               = lmv_create,
3563         .m_enqueue              = lmv_enqueue,
3564         .m_getattr              = lmv_getattr,
3565         .m_getxattr             = lmv_getxattr,
3566         .m_getattr_name         = lmv_getattr_name,
3567         .m_intent_lock          = lmv_intent_lock,
3568         .m_link                 = lmv_link,
3569         .m_rename               = lmv_rename,
3570         .m_setattr              = lmv_setattr,
3571         .m_setxattr             = lmv_setxattr,
3572         .m_fsync                = lmv_fsync,
3573         .m_file_resync          = lmv_file_resync,
3574         .m_read_page            = lmv_read_page,
3575         .m_unlink               = lmv_unlink,
3576         .m_init_ea_size         = lmv_init_ea_size,
3577         .m_cancel_unused        = lmv_cancel_unused,
3578         .m_set_lock_data        = lmv_set_lock_data,
3579         .m_lock_match           = lmv_lock_match,
3580         .m_get_lustre_md        = lmv_get_lustre_md,
3581         .m_free_lustre_md       = lmv_free_lustre_md,
3582         .m_merge_attr           = lmv_merge_attr,
3583         .m_set_open_replay_data = lmv_set_open_replay_data,
3584         .m_clear_open_replay_data = lmv_clear_open_replay_data,
3585         .m_intent_getattr_async = lmv_intent_getattr_async,
3586         .m_revalidate_lock      = lmv_revalidate_lock,
3587         .m_get_fid_from_lsm     = lmv_get_fid_from_lsm,
3588         .m_unpackmd             = lmv_unpackmd,
3589         .m_rmfid                = lmv_rmfid,
3590 };
3591
3592 static int __init lmv_init(void)
3593 {
3594         return class_register_type(&lmv_obd_ops, &lmv_md_ops, true, NULL,
3595                                    LUSTRE_LMV_NAME, NULL);
3596 }
3597
3598 static void __exit lmv_exit(void)
3599 {
3600         class_unregister_type(LUSTRE_LMV_NAME);
3601 }
3602
3603 MODULE_AUTHOR("OpenSFS, Inc. <http://www.lustre.org/>");
3604 MODULE_DESCRIPTION("Lustre Logical Metadata Volume");
3605 MODULE_VERSION(LUSTRE_VERSION_STRING);
3606 MODULE_LICENSE("GPL");
3607
3608 module_init(lmv_init);
3609 module_exit(lmv_exit);