lustre/mdt/mdt_open.c

   1 /*
   2  * GPL HEADER START
   3  *
   4  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License version 2 only,
   8  * as published by the Free Software Foundation.
   9  *
  10  * This program is distributed in the hope that it will be useful, but
  11  * WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13  * General Public License version 2 for more details (a copy is included
  14  * in the LICENSE file that accompanied this code).
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * version 2 along with this program; If not, see
  18  * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
  19  *
  20  * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
  21  * CA 95054 USA or visit www.sun.com if you need additional information or
  22  * have any questions.
  23  *
  24  * GPL HEADER END
  25  */
  26 /*
  27  * Copyright (c) 2007, 2010, Oracle and/or its affiliates. All rights reserved.
  28  * Use is subject to license terms.
  29  *
  30  * Copyright (c) 2011, 2014, Intel Corporation.
  31  */
  32 /*
  33  * This file is part of Lustre, http://www.lustre.org/
  34  * Lustre is a trademark of Sun Microsystems, Inc.
  35  *
  36  * lustre/mdt/mdt_open.c
  37  *
  38  * Lustre Metadata Target (mdt) open/close file handling
  39  *
  40  * Author: Huang Hua <huanghua@clusterfs.com>
  41  */
  42
  43 #define DEBUG_SUBSYSTEM S_MDS
  44
  45 #include <lustre_acl.h>
  46 #include <lustre_mds.h>
  47 #include "mdt_internal.h"
  48 #include <lustre_nodemap.h>
  49
  50 /* we do nothing because we do not have refcount now */
  51 static void mdt_mfd_get(void *mfdp)
  52 {
  53 }
  54
  55 static struct portals_handle_ops mfd_handle_ops = {
  56         .hop_addref = mdt_mfd_get,
  57         .hop_free   = NULL,
  58 };
  59
  60 /* Create a new mdt_file_data struct, initialize it,
  61  * and insert it to global hash table */
  62 struct mdt_file_data *mdt_mfd_new(const struct mdt_export_data *med)
  63 {
  64         struct mdt_file_data *mfd;
  65         ENTRY;
  66
  67         OBD_ALLOC_PTR(mfd);
  68         if (mfd != NULL) {
  69                 INIT_LIST_HEAD(&mfd->mfd_handle.h_link);
  70                 mfd->mfd_handle.h_owner = med;
  71                 INIT_LIST_HEAD(&mfd->mfd_list);
  72                 class_handle_hash(&mfd->mfd_handle, &mfd_handle_ops);
  73         }
  74
  75         RETURN(mfd);
  76 }
  77
  78 /*
  79  * Find the mfd pointed to by handle in global hash table.
  80  * In case of replay the handle is obsoleted
  81  * but mfd can be found in mfd list by that handle.
  82  * Callers need to be holding med_open_lock.
  83  */
  84 struct mdt_file_data *mdt_handle2mfd(struct mdt_export_data *med,
  85                                      const struct lustre_handle *handle,
  86                                      bool is_replay_or_resent)
  87 {
  88         struct mdt_file_data   *mfd;
  89         ENTRY;
  90
  91         LASSERT(handle != NULL);
  92         mfd = class_handle2object(handle->cookie, med);
  93         /* during dw/setattr replay the mfd can be found by old handle */
  94         if (mfd == NULL && is_replay_or_resent) {
  95                 list_for_each_entry(mfd, &med->med_open_head, mfd_list) {
  96                         if (mfd->mfd_old_handle.cookie == handle->cookie)
  97                                 RETURN(mfd);
  98                 }
  99                 mfd = NULL;
 100         }
 101
 102         RETURN(mfd);
 103 }
 104
 105 /* free mfd */
 106 void mdt_mfd_free(struct mdt_file_data *mfd)
 107 {
 108         LASSERT(list_empty(&mfd->mfd_list));
 109         OBD_FREE_RCU(mfd, sizeof *mfd, &mfd->mfd_handle);
 110 }
 111
 112 static int mdt_create_data(struct mdt_thread_info *info,
 113                            struct mdt_object *p, struct mdt_object *o)
 114 {
 115         struct md_op_spec     *spec = &info->mti_spec;
 116         struct md_attr        *ma   = &info->mti_attr;
 117         int                    rc   = 0;
 118         ENTRY;
 119
 120         if (!md_should_create(spec->sp_cr_flags))
 121                 RETURN(0);
 122
 123         ma->ma_need = MA_INODE | MA_LOV;
 124         ma->ma_valid = 0;
 125         mutex_lock(&o->mot_lov_mutex);
 126         if (!(o->mot_flags & MOF_LOV_CREATED)) {
 127                 rc = mdo_create_data(info->mti_env,
 128                                      p ? mdt_object_child(p) : NULL,
 129                                      mdt_object_child(o), spec, ma);
 130                 if (rc == 0)
 131                         rc = mdt_attr_get_complex(info, o, ma);
 132
 133                 if (rc == 0 && ma->ma_valid & MA_LOV)
 134                         o->mot_flags |= MOF_LOV_CREATED;
 135         }
 136
 137         mutex_unlock(&o->mot_lov_mutex);
 138         RETURN(rc);
 139 }
 140
 141 int mdt_write_read(struct mdt_object *o)
 142 {
 143         int rc = 0;
 144         ENTRY;
 145         spin_lock(&o->mot_write_lock);
 146         rc = o->mot_write_count;
 147         spin_unlock(&o->mot_write_lock);
 148         RETURN(rc);
 149 }
 150
 151 int mdt_write_get(struct mdt_object *o)
 152 {
 153         int rc = 0;
 154         ENTRY;
 155         spin_lock(&o->mot_write_lock);
 156         if (o->mot_write_count < 0)
 157                 rc = -ETXTBSY;
 158         else
 159                 o->mot_write_count++;
 160         spin_unlock(&o->mot_write_lock);
 161
 162         RETURN(rc);
 163 }
 164
 165 void mdt_write_put(struct mdt_object *o)
 166 {
 167         ENTRY;
 168         spin_lock(&o->mot_write_lock);
 169         o->mot_write_count--;
 170         spin_unlock(&o->mot_write_lock);
 171         EXIT;
 172 }
 173
 174 static int mdt_write_deny(struct mdt_object *o)
 175 {
 176         int rc = 0;
 177         ENTRY;
 178         spin_lock(&o->mot_write_lock);
 179         if (o->mot_write_count > 0)
 180                 rc = -ETXTBSY;
 181         else
 182                 o->mot_write_count--;
 183         spin_unlock(&o->mot_write_lock);
 184         RETURN(rc);
 185 }
 186
 187 static void mdt_write_allow(struct mdt_object *o)
 188 {
 189         ENTRY;
 190         spin_lock(&o->mot_write_lock);
 191         o->mot_write_count++;
 192         spin_unlock(&o->mot_write_lock);
 193         EXIT;
 194 }
 195
 196 /* there can be no real transaction so prepare the fake one */
 197 static void mdt_empty_transno(struct mdt_thread_info *info, int rc)
 198 {
 199         struct mdt_device      *mdt = info->mti_mdt;
 200         struct ptlrpc_request  *req = mdt_info_req(info);
 201         struct tg_export_data  *ted;
 202         struct lsd_client_data *lcd;
 203
 204         ENTRY;
 205         /* transaction has occurred already */
 206         if (lustre_msg_get_transno(req->rq_repmsg) != 0)
 207                 RETURN_EXIT;
 208
 209         spin_lock(&mdt->mdt_lut.lut_translock);
 210         if (rc != 0) {
 211                 if (info->mti_transno != 0) {
 212                         struct obd_export *exp = req->rq_export;
 213
 214                         CERROR("%s: replay trans "LPU64" NID %s: rc = %d\n",
 215                                mdt_obd_name(mdt), info->mti_transno,
 216                                libcfs_nid2str(exp->exp_connection->c_peer.nid),
 217                                rc);
 218                         spin_unlock(&mdt->mdt_lut.lut_translock);
 219                         RETURN_EXIT;
 220                 }
 221         } else if (info->mti_transno == 0) {
 222                 info->mti_transno = ++mdt->mdt_lut.lut_last_transno;
 223         } else {
 224                 /* should be replay */
 225                 if (info->mti_transno > mdt->mdt_lut.lut_last_transno)
 226                         mdt->mdt_lut.lut_last_transno = info->mti_transno;
 227         }
 228         spin_unlock(&mdt->mdt_lut.lut_translock);
 229
 230         CDEBUG(D_INODE, "transno = "LPU64", last_committed = "LPU64"\n",
 231                info->mti_transno,
 232                req->rq_export->exp_obd->obd_last_committed);
 233
 234         req->rq_transno = info->mti_transno;
 235         lustre_msg_set_transno(req->rq_repmsg, info->mti_transno);
 236
 237         /* update lcd in memory only for resent cases */
 238         ted = &req->rq_export->exp_target_data;
 239         LASSERT(ted);
 240         mutex_lock(&ted->ted_lcd_lock);
 241         lcd = ted->ted_lcd;
 242         if (info->mti_transno < lcd->lcd_last_transno &&
 243             info->mti_transno != 0) {
 244                 /* This should happen during replay. Do not update
 245                  * last rcvd info if replay req transno < last transno,
 246                  * otherwise the following resend(after replay) can not
 247                  * be checked correctly by xid */
 248                 mutex_unlock(&ted->ted_lcd_lock);
 249                 CDEBUG(D_HA, "%s: transno = "LPU64" < last_transno = "LPU64"\n",
 250                        mdt_obd_name(mdt), info->mti_transno,
 251                        lcd->lcd_last_transno);
 252                 RETURN_EXIT;
 253         }
 254
 255         if (lustre_msg_get_opc(req->rq_reqmsg) == MDS_CLOSE) {
 256                 if (info->mti_transno != 0)
 257                         lcd->lcd_last_close_transno = info->mti_transno;
 258                 lcd->lcd_last_close_xid = req->rq_xid;
 259                 lcd->lcd_last_close_result = rc;
 260         } else {
 261                 /* VBR: save versions in last_rcvd for reconstruct. */
 262                 __u64 *pre_versions = lustre_msg_get_versions(req->rq_repmsg);
 263                 if (pre_versions) {
 264                         lcd->lcd_pre_versions[0] = pre_versions[0];
 265                         lcd->lcd_pre_versions[1] = pre_versions[1];
 266                         lcd->lcd_pre_versions[2] = pre_versions[2];
 267                         lcd->lcd_pre_versions[3] = pre_versions[3];
 268                 }
 269                 if (info->mti_transno != 0)
 270                         lcd->lcd_last_transno = info->mti_transno;
 271
 272                 lcd->lcd_last_xid = req->rq_xid;
 273                 lcd->lcd_last_result = rc;
 274                 lcd->lcd_last_data = info->mti_opdata;
 275         }
 276         mutex_unlock(&ted->ted_lcd_lock);
 277
 278         EXIT;
 279 }
 280
 281 void mdt_mfd_set_mode(struct mdt_file_data *mfd, __u64 mode)
 282 {
 283         LASSERT(mfd != NULL);
 284
 285         CDEBUG(D_HA, DFID " Change mfd mode "LPO64" -> "LPO64".\n",
 286                PFID(mdt_object_fid(mfd->mfd_object)), mfd->mfd_mode, mode);
 287
 288         mfd->mfd_mode = mode;
 289 }
 290
 291 /**
 292  * prep ma_lmm/ma_lmv for md_attr from reply
 293  */
 294 static void mdt_prep_ma_buf_from_rep(struct mdt_thread_info *info,
 295                                      struct mdt_object *obj,
 296                                      struct md_attr *ma)
 297 {
 298         LASSERT(ma->ma_lmv == NULL && ma->ma_lmm == NULL);
 299         if (S_ISDIR(obj->mot_header.loh_attr)) {
 300                 ma->ma_lmv = req_capsule_server_get(info->mti_pill,
 301                                                     &RMF_MDT_MD);
 302                 ma->ma_lmv_size = req_capsule_get_size(info->mti_pill,
 303                                                        &RMF_MDT_MD,
 304                                                        RCL_SERVER);
 305                 if (ma->ma_lmv_size > 0)
 306                         ma->ma_need |= MA_LMV;
 307         } else {
 308                 ma->ma_lmm = req_capsule_server_get(info->mti_pill,
 309                                                     &RMF_MDT_MD);
 310                 ma->ma_lmm_size = req_capsule_get_size(info->mti_pill,
 311                                                        &RMF_MDT_MD,
 312                                                        RCL_SERVER);
 313                 if (ma->ma_lmm_size > 0)
 314                         ma->ma_need |= MA_LOV;
 315         }
 316 }
 317
 318 static int mdt_mfd_open(struct mdt_thread_info *info, struct mdt_object *p,
 319                         struct mdt_object *o, __u64 flags, int created,
 320                         struct ldlm_reply *rep)
 321 {
 322         struct ptlrpc_request   *req = mdt_info_req(info);
 323         struct mdt_export_data  *med = &req->rq_export->exp_mdt_data;
 324         struct mdt_file_data    *mfd;
 325         struct md_attr          *ma  = &info->mti_attr;
 326         struct lu_attr          *la  = &ma->ma_attr;
 327         struct mdt_body         *repbody;
 328         int                      rc = 0, isdir, isreg;
 329         ENTRY;
 330
 331         repbody = req_capsule_server_get(info->mti_pill, &RMF_MDT_BODY);
 332
 333         isreg = S_ISREG(la->la_mode);
 334         isdir = S_ISDIR(la->la_mode);
 335         if (isreg && !(ma->ma_valid & MA_LOV) && !(flags & MDS_OPEN_RELEASE)) {
 336                 /*
 337                  * No EA, check whether it is will set regEA and dirEA since in
 338                  * above attr get, these size might be zero, so reset it, to
 339                  * retrieve the MD after create obj.
 340                  */
 341                 ma->ma_lmm_size = req_capsule_get_size(info->mti_pill,
 342                                                        &RMF_MDT_MD,
 343                                                        RCL_SERVER);
 344                 /* in replay case, p == NULL */
 345                 rc = mdt_create_data(info, p, o);
 346                 if (rc)
 347                         RETURN(rc);
 348
 349                 if (exp_connect_flags(req->rq_export) & OBD_CONNECT_DISP_STRIPE)
 350                         mdt_set_disposition(info, rep, DISP_OPEN_STRIPE);
 351         }
 352
 353         CDEBUG(D_INODE, "after open, ma_valid bit = "LPX64" lmm_size = %d\n",
 354                ma->ma_valid, ma->ma_lmm_size);
 355
 356         if (ma->ma_valid & MA_LOV) {
 357                 LASSERT(ma->ma_lmm_size != 0);
 358                 repbody->mbo_eadatasize = ma->ma_lmm_size;
 359                 if (isdir)
 360                         repbody->mbo_valid |= OBD_MD_FLDIREA;
 361                 else
 362                         repbody->mbo_valid |= OBD_MD_FLEASIZE;
 363         }
 364
 365         if (ma->ma_valid & MA_LMV) {
 366                 LASSERT(ma->ma_lmv_size != 0);
 367                 repbody->mbo_eadatasize = ma->ma_lmv_size;
 368                 LASSERT(isdir);
 369                 repbody->mbo_valid |= OBD_MD_FLDIREA | OBD_MD_MEA;
 370         }
 371
 372         if (flags & FMODE_WRITE)
 373                 rc = mdt_write_get(o);
 374         else if (flags & MDS_FMODE_EXEC)
 375                 rc = mdt_write_deny(o);
 376
 377         if (rc)
 378                 RETURN(rc);
 379
 380         rc = mo_open(info->mti_env, mdt_object_child(o),
 381                      created ? flags | MDS_OPEN_CREATED : flags);
 382         if (rc != 0) {
 383                 /* If we allow the client to chgrp (CFS_SETGRP_PERM), but the
 384                  * client does not know which suppgid should be sent to the MDS,
 385                  * or some other(s) changed the target file's GID after this RPC
 386                  * sent to the MDS with the suppgid as the original GID, then we
 387                  * give the client another chance to send the right suppgid. */
 388                 if (rc == -EACCES &&
 389                     allow_client_chgrp(info, lu_ucred(info->mti_env)))
 390                         mdt_set_disposition(info, rep, DISP_OPEN_DENY);
 391
 392                 GOTO(err_out, rc);
 393         }
 394
 395         mfd = mdt_mfd_new(med);
 396         if (mfd == NULL)
 397                 GOTO(err_out, rc = -ENOMEM);
 398
 399         /*
 400          * Keep a reference on this object for this open, and is
 401          * released by mdt_mfd_close().
 402          */
 403         mdt_object_get(info->mti_env, o);
 404         mfd->mfd_object = o;
 405         mfd->mfd_xid = req->rq_xid;
 406
 407         /*
 408          * @flags is always not zero. At least it should be FMODE_READ,
 409          * FMODE_WRITE or MDS_FMODE_EXEC.
 410          */
 411         LASSERT(flags != 0);
 412
 413         /* Open handling. */
 414         mdt_mfd_set_mode(mfd, flags);
 415
 416         atomic_inc(&o->mot_open_count);
 417         if (flags & MDS_OPEN_LEASE)
 418                 atomic_inc(&o->mot_lease_count);
 419
 420         /* replay handle */
 421         if (req_is_replay(req)) {
 422                 struct mdt_file_data *old_mfd;
 423                 /* Check wheather old cookie already exist in
 424                  * the list, becasue when do recovery, client
 425                  * might be disconnected from server, and
 426                  * restart replay, so there maybe some orphan
 427                  * mfd here, we should remove them */
 428                 LASSERT(info->mti_rr.rr_handle != NULL);
 429                 spin_lock(&med->med_open_lock);
 430                 old_mfd = mdt_handle2mfd(med, info->mti_rr.rr_handle, true);
 431                 if (old_mfd != NULL) {
 432                         CDEBUG(D_HA, "delete orphan mfd = %p, fid = "DFID", "
 433                                "cookie = "LPX64"\n", mfd,
 434                                PFID(mdt_object_fid(mfd->mfd_object)),
 435                                info->mti_rr.rr_handle->cookie);
 436                         class_handle_unhash(&old_mfd->mfd_handle);
 437                         list_del_init(&old_mfd->mfd_list);
 438                         spin_unlock(&med->med_open_lock);
 439                         /* no attr update for that close */
 440                         la->la_valid = 0;
 441                         ma->ma_valid |= MA_FLAGS;
 442                         ma->ma_attr_flags |= MDS_RECOV_OPEN;
 443                         mdt_mfd_close(info, old_mfd);
 444                         ma->ma_attr_flags &= ~MDS_RECOV_OPEN;
 445                         ma->ma_valid &= ~MA_FLAGS;
 446                 } else {
 447                         spin_unlock(&med->med_open_lock);
 448                         CDEBUG(D_HA, "orphan mfd not found, fid = "DFID", "
 449                                "cookie = "LPX64"\n",
 450                                PFID(mdt_object_fid(mfd->mfd_object)),
 451                                info->mti_rr.rr_handle->cookie);
 452                 }
 453
 454                 CDEBUG(D_HA, "Store old cookie "LPX64" in new mfd\n",
 455                        info->mti_rr.rr_handle->cookie);
 456
 457                 mfd->mfd_old_handle.cookie = info->mti_rr.rr_handle->cookie;
 458         }
 459
 460         repbody->mbo_handle.cookie = mfd->mfd_handle.h_cookie;
 461
 462         if (req->rq_export->exp_disconnected) {
 463                 spin_lock(&med->med_open_lock);
 464                 class_handle_unhash(&mfd->mfd_handle);
 465                 list_del_init(&mfd->mfd_list);
 466                 spin_unlock(&med->med_open_lock);
 467                 mdt_mfd_close(info, mfd);
 468         } else {
 469                 spin_lock(&med->med_open_lock);
 470                 list_add(&mfd->mfd_list, &med->med_open_head);
 471                 spin_unlock(&med->med_open_lock);
 472         }
 473
 474         mdt_empty_transno(info, rc);
 475
 476         RETURN(rc);
 477
 478 err_out:
 479         if (flags & FMODE_WRITE)
 480                 mdt_write_put(o);
 481         else if (flags & MDS_FMODE_EXEC)
 482                 mdt_write_allow(o);
 483
 484         return rc;
 485 }
 486
 487 static int mdt_finish_open(struct mdt_thread_info *info,
 488                            struct mdt_object *p, struct mdt_object *o,
 489                            __u64 flags, int created, struct ldlm_reply *rep)
 490 {
 491         struct ptlrpc_request   *req = mdt_info_req(info);
 492         struct obd_export       *exp = req->rq_export;
 493         struct mdt_export_data  *med = &req->rq_export->exp_mdt_data;
 494         struct md_attr          *ma  = &info->mti_attr;
 495         struct lu_attr          *la  = &ma->ma_attr;
 496         struct mdt_file_data    *mfd;
 497         struct mdt_body         *repbody;
 498         int                      rc = 0;
 499         int                      isreg, isdir, islnk;
 500         struct list_head        *t;
 501         ENTRY;
 502
 503         LASSERT(ma->ma_valid & MA_INODE);
 504
 505         repbody = req_capsule_server_get(info->mti_pill, &RMF_MDT_BODY);
 506
 507         isreg = S_ISREG(la->la_mode);
 508         isdir = S_ISDIR(la->la_mode);
 509         islnk = S_ISLNK(la->la_mode);
 510         mdt_pack_attr2body(info, repbody, la, mdt_object_fid(o));
 511
 512         /* LU-2275, simulate broken behaviour (esp. prevalent in
 513          * pre-2.4 servers where a very strange reply is sent on error
 514          * that looks like it was actually almost succesful and a failure at the
 515          * same time */
 516         if (OBD_FAIL_CHECK(OBD_FAIL_MDS_NEGATIVE_POSITIVE)) {
 517                 mdt_set_disposition(info, rep, DISP_OPEN_OPEN |
 518                                                DISP_LOOKUP_NEG |
 519                                                DISP_LOOKUP_POS);
 520
 521                 if (flags & MDS_OPEN_LOCK)
 522                         mdt_set_disposition(info, rep, DISP_OPEN_LOCK);
 523
 524                 RETURN(-ENOENT);
 525         }
 526
 527         if (exp_connect_rmtclient(exp)) {
 528                 void *buf = req_capsule_server_get(info->mti_pill, &RMF_ACL);
 529
 530                 rc = mdt_pack_remote_perm(info, o, buf);
 531                 if (rc) {
 532                         repbody->mbo_valid &= ~OBD_MD_FLRMTPERM;
 533                         repbody->mbo_aclsize = 0;
 534                 } else {
 535                         repbody->mbo_valid |= OBD_MD_FLRMTPERM;
 536                         repbody->mbo_aclsize = sizeof(struct mdt_remote_perm);
 537                 }
 538         }
 539 #ifdef CONFIG_FS_POSIX_ACL
 540         else if (exp_connect_flags(exp) & OBD_CONNECT_ACL)
 541                 rc = mdt_pack_acl2body(info, repbody, o,
 542                                        exp->exp_target_data.ted_nodemap);
 543 #endif
 544
 545         /*
 546          * If we are following a symlink, don't open; and do not return open
 547          * handle for special nodes as client required.
 548          */
 549         if (islnk || (!isreg && !isdir &&
 550             (exp_connect_flags(req->rq_export) & OBD_CONNECT_NODEVOH))) {
 551                 lustre_msg_set_transno(req->rq_repmsg, 0);
 552                 RETURN(0);
 553         }
 554
 555         /*
 556          * We need to return the existing object's fid back, so it is done here,
 557          * after preparing the reply.
 558          */
 559         if (!created && (flags & MDS_OPEN_EXCL) && (flags & MDS_OPEN_CREAT))
 560                 RETURN(-EEXIST);
 561
 562         /* This can't be done earlier, we need to return reply body */
 563         if (isdir) {
 564                 if (flags & (MDS_OPEN_CREAT | FMODE_WRITE)) {
 565                         /* We are trying to create or write an existing dir. */
 566                         RETURN(-EISDIR);
 567                 }
 568         } else if (flags & MDS_OPEN_DIRECTORY)
 569                 RETURN(-ENOTDIR);
 570
 571         if (OBD_FAIL_CHECK_RESET(OBD_FAIL_MDS_OPEN_CREATE,
 572                                  OBD_FAIL_LDLM_REPLY | OBD_FAIL_ONCE)) {
 573                 RETURN(-EAGAIN);
 574         }
 575
 576         mfd = NULL;
 577         if (lustre_msg_get_flags(req->rq_reqmsg) & MSG_RESENT) {
 578                 spin_lock(&med->med_open_lock);
 579                 list_for_each(t, &med->med_open_head) {
 580                         mfd = list_entry(t, struct mdt_file_data, mfd_list);
 581                         if (mfd->mfd_xid == req->rq_xid)
 582                                 break;
 583                         mfd = NULL;
 584                 }
 585                 spin_unlock(&med->med_open_lock);
 586
 587                 if (mfd != NULL) {
 588                         repbody->mbo_handle.cookie = mfd->mfd_handle.h_cookie;
 589                         /* set repbody->ea_size for resent case */
 590                         if (ma->ma_valid & MA_LOV) {
 591                                 LASSERT(ma->ma_lmm_size != 0);
 592                                 repbody->mbo_eadatasize = ma->ma_lmm_size;
 593                                 if (isdir)
 594                                         repbody->mbo_valid |= OBD_MD_FLDIREA;
 595                                 else
 596                                         repbody->mbo_valid |= OBD_MD_FLEASIZE;
 597                         }
 598                         mdt_set_disposition(info, rep, DISP_OPEN_OPEN);
 599                         RETURN(0);
 600                 }
 601         }
 602
 603         rc = mdt_mfd_open(info, p, o, flags, created, rep);
 604         if (!rc)
 605                 mdt_set_disposition(info, rep, DISP_OPEN_OPEN);
 606
 607         RETURN(rc);
 608 }
 609
 610 void mdt_reconstruct_open(struct mdt_thread_info *info,
 611                           struct mdt_lock_handle *lhc)
 612 {
 613         const struct lu_env *env = info->mti_env;
 614         struct mdt_device       *mdt  = info->mti_mdt;
 615         struct req_capsule      *pill = info->mti_pill;
 616         struct ptlrpc_request   *req  = mdt_info_req(info);
 617         struct tg_export_data   *ted  = &req->rq_export->exp_target_data;
 618         struct lsd_client_data  *lcd  = ted->ted_lcd;
 619         struct md_attr          *ma   = &info->mti_attr;
 620         struct mdt_reint_record *rr   = &info->mti_rr;
 621         __u64                   flags = info->mti_spec.sp_cr_flags;
 622         struct ldlm_reply       *ldlm_rep;
 623         struct mdt_object       *parent;
 624         struct mdt_object       *child;
 625         struct mdt_body         *repbody;
 626         int                      rc;
 627         ENTRY;
 628
 629         LASSERT(pill->rc_fmt == &RQF_LDLM_INTENT_OPEN);
 630         ldlm_rep = req_capsule_server_get(pill, &RMF_DLM_REP);
 631         repbody = req_capsule_server_get(pill, &RMF_MDT_BODY);
 632
 633         ma->ma_need = MA_INODE | MA_HSM;
 634         ma->ma_valid = 0;
 635
 636         mdt_req_from_lcd(req, lcd);
 637         mdt_set_disposition(info, ldlm_rep, lcd->lcd_last_data);
 638
 639         CDEBUG(D_INODE, "This is reconstruct open: disp="LPX64", result=%d\n",
 640                ldlm_rep->lock_policy_res1, req->rq_status);
 641
 642         if (mdt_get_disposition(ldlm_rep, DISP_OPEN_CREATE) &&
 643             req->rq_status != 0)
 644                 /* We did not create successfully, return error to client. */
 645                 GOTO(out, rc = req->rq_status);
 646
 647         if (mdt_get_disposition(ldlm_rep, DISP_OPEN_CREATE)) {
 648                 struct obd_export *exp = req->rq_export;
 649                 /*
 650                  * We failed after creation, but we do not know in which step
 651                  * we failed. So try to check the child object.
 652                  */
 653                 parent = mdt_object_find(env, mdt, rr->rr_fid1);
 654                 if (IS_ERR(parent)) {
 655                         rc = PTR_ERR(parent);
 656                         LCONSOLE_WARN("Parent "DFID" lookup error %d."
 657                                       " Evicting client %s with export %s.\n",
 658                                       PFID(rr->rr_fid1), rc,
 659                                       obd_uuid2str(&exp->exp_client_uuid),
 660                                       obd_export_nid2str(exp));
 661                         mdt_export_evict(exp);
 662                         RETURN_EXIT;
 663                 }
 664
 665                 child = mdt_object_find(env, mdt, rr->rr_fid2);
 666                 if (IS_ERR(child)) {
 667                         rc = PTR_ERR(child);
 668                         LCONSOLE_WARN("cannot lookup child "DFID": rc = %d; "
 669                                       "evicting client %s with export %s\n",
 670                                       PFID(rr->rr_fid2), rc,
 671                                       obd_uuid2str(&exp->exp_client_uuid),
 672                                       obd_export_nid2str(exp));
 673                         mdt_object_put(env, parent);
 674                         mdt_export_evict(exp);
 675                         RETURN_EXIT;
 676                 }
 677
 678                 if (unlikely(mdt_object_remote(child))) {
 679                         /* the child object was created on remote server */
 680                         if (!mdt_is_dne_client(exp)) {
 681                                 /* Return -EIO for old client */
 682                                 mdt_object_put(env, parent);
 683                                 mdt_object_put(env, child);
 684                                 GOTO(out, rc = -EIO);
 685                         }
 686                         repbody->mbo_fid1 = *rr->rr_fid2;
 687                         repbody->mbo_valid |= (OBD_MD_FLID | OBD_MD_MDS);
 688                         rc = 0;
 689                 } else {
 690                         if (mdt_object_exists(child)) {
 691                                 mdt_prep_ma_buf_from_rep(info, child, ma);
 692                                 rc = mdt_attr_get_complex(info, child, ma);
 693                                 if (rc == 0)
 694                                         rc = mdt_finish_open(info, parent,
 695                                                              child, flags,
 696                                                              1, ldlm_rep);
 697                         } else {
 698                                 /* the child does not exist, we should do
 699                                  * regular open */
 700                                 mdt_object_put(env, parent);
 701                                 mdt_object_put(env, child);
 702                                 GOTO(regular_open, 0);
 703                         }
 704                 }
 705                 mdt_object_put(env, parent);
 706                 mdt_object_put(env, child);
 707                 GOTO(out, rc);
 708         } else {
 709 regular_open:
 710                 /* We did not try to create, so we are a pure open */
 711                 rc = mdt_reint_open(info, lhc);
 712         }
 713
 714         EXIT;
 715 out:
 716         req->rq_status = rc;
 717         lustre_msg_set_status(req->rq_repmsg, req->rq_status);
 718         LASSERT(ergo(rc < 0, lustre_msg_get_transno(req->rq_repmsg) == 0));
 719 }
 720
 721 static int mdt_open_by_fid(struct mdt_thread_info *info, struct ldlm_reply *rep)
 722 {
 723         __u64                    flags = info->mti_spec.sp_cr_flags;
 724         struct mdt_reint_record *rr = &info->mti_rr;
 725         struct md_attr          *ma = &info->mti_attr;
 726         struct mdt_object       *o;
 727         int                      rc;
 728         ENTRY;
 729
 730         o = mdt_object_find(info->mti_env, info->mti_mdt, rr->rr_fid2);
 731         if (IS_ERR(o))
 732                 RETURN(rc = PTR_ERR(o));
 733
 734         if (unlikely(mdt_object_remote(o))) {
 735                 /* the child object was created on remote server */
 736                 struct mdt_body *repbody;
 737
 738                 mdt_set_disposition(info, rep, (DISP_IT_EXECD |
 739                                                 DISP_LOOKUP_EXECD |
 740                                                 DISP_LOOKUP_POS));
 741                 repbody = req_capsule_server_get(info->mti_pill, &RMF_MDT_BODY);
 742                 repbody->mbo_fid1 = *rr->rr_fid2;
 743                 repbody->mbo_valid |= (OBD_MD_FLID | OBD_MD_MDS);
 744                 rc = 0;
 745         } else {
 746                 if (mdt_object_exists(o)) {
 747                         mdt_set_disposition(info, rep, (DISP_IT_EXECD |
 748                                                         DISP_LOOKUP_EXECD |
 749                                                         DISP_LOOKUP_POS));
 750                         mdt_prep_ma_buf_from_rep(info, o, ma);
 751                         rc = mdt_attr_get_complex(info, o, ma);
 752                         if (rc == 0)
 753                                 rc = mdt_finish_open(info, NULL, o, flags, 0,
 754                                                      rep);
 755                 } else {
 756                         rc = -ENOENT;
 757                 }
 758         }
 759
 760         mdt_object_put(info->mti_env, o);
 761         RETURN(rc);
 762 }
 763
 764 /* lock object for open */
 765 static int mdt_object_open_lock(struct mdt_thread_info *info,
 766                                 struct mdt_object *obj,
 767                                 struct mdt_lock_handle *lhc,
 768                                 __u64 *ibits)
 769 {
 770         struct md_attr  *ma = &info->mti_attr;
 771         __u64            open_flags = info->mti_spec.sp_cr_flags;
 772         ldlm_mode_t      lm = LCK_CR;
 773         bool             acq_lease = !!(open_flags & MDS_OPEN_LEASE);
 774         bool             try_layout = false;
 775         bool             create_layout = false;
 776         int              rc = 0;
 777         ENTRY;
 778
 779         *ibits = 0;
 780         mdt_lock_handle_init(lhc);
 781
 782         if (req_is_replay(mdt_info_req(info)))
 783                 RETURN(0);
 784
 785         if (S_ISREG(lu_object_attr(&obj->mot_obj))) {
 786                 if (ma->ma_need & MA_LOV && !(ma->ma_valid & MA_LOV) &&
 787                     md_should_create(open_flags))
 788                         create_layout = true;
 789                 if (exp_connect_layout(info->mti_exp) && !create_layout &&
 790                     ma->ma_need & MA_LOV)
 791                         try_layout = true;
 792         }
 793
 794         if (acq_lease) {
 795                 /* lease open, acquire write mode of open sem */
 796                 down_write(&obj->mot_open_sem);
 797
 798                 /* Lease exists and ask for new lease */
 799                 if (atomic_read(&obj->mot_lease_count) > 0) {
 800                         /* only exclusive open is supported, so lease
 801                          * are conflicted to each other */
 802                         GOTO(out, rc = -EBUSY);
 803                 }
 804
 805                 /* Lease must be with open lock */
 806                 if (!(open_flags & MDS_OPEN_LOCK)) {
 807                         CERROR("Request lease for file:"DFID ", but open lock "
 808                                 "is missed, open_flags = "LPO64".\n",
 809                                 PFID(mdt_object_fid(obj)), open_flags);
 810                         GOTO(out, rc = -EPROTO);
 811                 }
 812
 813                 /* XXX: only exclusive open is supported. */
 814                 lm = LCK_EX;
 815                 *ibits = MDS_INODELOCK_OPEN;
 816
 817                 /* never grant LCK_EX layout lock to client */
 818                 try_layout = false;
 819         } else { /* normal open */
 820                 /* normal open holds read mode of open sem */
 821                 down_read(&obj->mot_open_sem);
 822
 823                 if (open_flags & MDS_OPEN_LOCK) {
 824                         if (open_flags & FMODE_WRITE)
 825                                 lm = LCK_CW;
 826                         else if (open_flags & MDS_FMODE_EXEC)
 827                                 lm = LCK_PR;
 828                         else
 829                                 lm = LCK_CR;
 830
 831                         *ibits = MDS_INODELOCK_LOOKUP | MDS_INODELOCK_OPEN;
 832                 } else if (atomic_read(&obj->mot_lease_count) > 0) {
 833                         if (open_flags & FMODE_WRITE)
 834                                 lm = LCK_CW;
 835                         else
 836                                 lm = LCK_CR;
 837
 838                         /* revoke lease */
 839                         *ibits = MDS_INODELOCK_OPEN;
 840                         try_layout = false;
 841
 842                         lhc = &info->mti_lh[MDT_LH_LOCAL];
 843                 }
 844                 CDEBUG(D_INODE, "normal open:"DFID" lease count: %d, lm: %d\n",
 845                         PFID(mdt_object_fid(obj)),
 846                         atomic_read(&obj->mot_open_count), lm);
 847         }
 848
 849         mdt_lock_reg_init(lhc, lm);
 850
 851         /* one problem to return layout lock on open is that it may result
 852          * in too many layout locks cached on the client side. */
 853         if (!OBD_FAIL_CHECK(OBD_FAIL_MDS_NO_LL_OPEN) && try_layout) {
 854                 /* return lookup lock to validate inode at the client side,
 855                  * this is pretty important otherwise mdt will return layout
 856                  * lock for each open.
 857                  * However this is a double-edged sword because changing
 858                  * permission will revoke huge # of LOOKUP locks. */
 859                 *ibits |= MDS_INODELOCK_LAYOUT | MDS_INODELOCK_LOOKUP;
 860                 if (!mdt_object_lock_try(info, obj, lhc, *ibits,
 861                                          MDT_CROSS_LOCK)) {
 862                         *ibits &= ~(MDS_INODELOCK_LAYOUT|MDS_INODELOCK_LOOKUP);
 863                         if (*ibits != 0)
 864                                 rc = mdt_object_lock(info, obj, lhc, *ibits,
 865                                                 MDT_CROSS_LOCK);
 866                 }
 867         } else if (*ibits != 0) {
 868                 rc = mdt_object_lock(info, obj, lhc, *ibits, MDT_CROSS_LOCK);
 869         }
 870
 871         CDEBUG(D_INODE, "Requested bits lock:"DFID ", ibits = "LPX64
 872                 ", open_flags = "LPO64", try_layout = %d, rc = %d\n",
 873                 PFID(mdt_object_fid(obj)), *ibits, open_flags, try_layout, rc);
 874
 875         /* will change layout, revoke layout locks by enqueuing EX lock. */
 876         if (rc == 0 && create_layout) {
 877                 struct mdt_lock_handle *ll = &info->mti_lh[MDT_LH_LAYOUT];
 878
 879                 CDEBUG(D_INODE, "Will create layout, get EX layout lock:"DFID
 880                         ", open_flags = "LPO64"\n",
 881                         PFID(mdt_object_fid(obj)), open_flags);
 882
 883                 /* We cannot enqueue another lock for the same resource we
 884                  * already have a lock for, due to mechanics of waiting list
 885                  * iterating in ldlm, see LU-3601.
 886                  * As such we'll drop the open lock we just got above here,
 887                  * it's ok not to have this open lock as it's main purpose is to
 888                  * flush unused cached client open handles. */
 889                 if (lustre_handle_is_used(&lhc->mlh_reg_lh))
 890                         mdt_object_unlock(info, obj, lhc, 1);
 891
 892                 LASSERT(!try_layout);
 893                 mdt_lock_handle_init(ll);
 894                 mdt_lock_reg_init(ll, LCK_EX);
 895                 rc = mdt_object_lock(info, obj, ll, MDS_INODELOCK_LAYOUT,
 896                                         MDT_LOCAL_LOCK);
 897
 898                 OBD_FAIL_TIMEOUT(OBD_FAIL_MDS_LL_BLOCK, 2);
 899         }
 900
 901         /* Check if there is any other open handles after acquiring
 902          * open lock. At this point, caching open handles have been revoked
 903          * by open lock.
 904          * XXX: Now only exclusive open is supported. Need to check the
 905          * type of open for generic lease support. */
 906         if (rc == 0 && acq_lease) {
 907                 struct ptlrpc_request *req = mdt_info_req(info);
 908                 struct mdt_export_data *med = &req->rq_export->exp_mdt_data;
 909                 struct mdt_file_data *mfd;
 910                 bool is_replay_or_resent;
 911                 int open_count = 0;
 912
 913                 /* For lease: application can open a file and then apply lease,
 914                  * @handle contains original open handle in that case.
 915                  * In recovery, open REQ will be replayed and the lease REQ may
 916                  * be resent that means the open handle is already stale, so we
 917                  * need to fix it up here by finding new handle. */
 918                 is_replay_or_resent = req_is_replay(req) ||
 919                         lustre_msg_get_flags(req->rq_reqmsg) & MSG_RESENT;
 920
 921                 /* if the request is _not_ a replay request, rr_handle
 922                  * may be used to hold an openhandle which is issuing the
 923                  * lease request, so that this openhandle doesn't count. */
 924                 mfd = mdt_handle2mfd(med, info->mti_rr.rr_handle,
 925                                      is_replay_or_resent);
 926                 if (mfd != NULL)
 927                         ++open_count;
 928
 929                 CDEBUG(D_INODE, "acq_lease "DFID": openers: %d, want: %d\n",
 930                         PFID(mdt_object_fid(obj)),
 931                         atomic_read(&obj->mot_open_count), open_count);
 932
 933                 if (atomic_read(&obj->mot_open_count) > open_count)
 934                         GOTO(out, rc = -EBUSY);
 935         }
 936         GOTO(out, rc);
 937
 938 out:
 939         RETURN(rc);
 940 }
 941
 942 static void mdt_object_open_unlock(struct mdt_thread_info *info,
 943                                    struct mdt_object *obj,
 944                                    struct mdt_lock_handle *lhc,
 945                                    __u64 ibits, int rc)
 946 {
 947         __u64 open_flags = info->mti_spec.sp_cr_flags;
 948         struct mdt_lock_handle *ll = &info->mti_lh[MDT_LH_LOCAL];
 949         ENTRY;
 950
 951         if (req_is_replay(mdt_info_req(info)))
 952                 RETURN_EXIT;
 953
 954         /* Release local lock - the lock put in MDT_LH_LOCAL will never
 955          * return to client side. */
 956         if (lustre_handle_is_used(&ll->mlh_reg_lh))
 957                 mdt_object_unlock(info, obj, ll, 1);
 958
 959         ll = &info->mti_lh[MDT_LH_LAYOUT];
 960         /* Release local layout lock, layout was created */
 961         if (lustre_handle_is_used(&ll->mlh_reg_lh)) {
 962                 LASSERT(!(ibits & MDS_INODELOCK_LAYOUT));
 963                 mdt_object_unlock(info, obj, ll, 1);
 964         }
 965
 966         if (open_flags & MDS_OPEN_LEASE)
 967                 up_write(&obj->mot_open_sem);
 968         else
 969                 up_read(&obj->mot_open_sem);
 970
 971         /* Cross-ref case, the lock should be returned to the client */
 972         if (ibits == 0 || rc == -MDT_EREMOTE_OPEN)
 973                 RETURN_EXIT;
 974
 975         if (!(open_flags & MDS_OPEN_LOCK) && !(ibits & MDS_INODELOCK_LAYOUT)) {
 976                 /* for the open request, the lock will only return to client
 977                  * if open or layout lock is granted. */
 978                 rc = 1;
 979         }
 980
 981         if (rc != 0 || !lustre_handle_is_used(&lhc->mlh_reg_lh)) {
 982                 struct ldlm_reply       *ldlm_rep;
 983
 984                 ldlm_rep = req_capsule_server_get(info->mti_pill, &RMF_DLM_REP);
 985                 mdt_clear_disposition(info, ldlm_rep, DISP_OPEN_LOCK);
 986                 if (lustre_handle_is_used(&lhc->mlh_reg_lh))
 987                         mdt_object_unlock(info, obj, lhc, 1);
 988         }
 989         RETURN_EXIT;
 990 }
 991
 992 /**
 993  * Check release is permitted for the current HSM flags.
 994  */
 995 static bool mdt_hsm_release_allow(const struct md_attr *ma)
 996 {
 997         if (!(ma->ma_valid & MA_HSM))
 998                 return false;
 999
1000         if (ma->ma_hsm.mh_flags & (HS_DIRTY|HS_NORELEASE|HS_LOST))
1001                 return false;
1002
1003         if (!(ma->ma_hsm.mh_flags & HS_ARCHIVED))
1004                 return false;
1005
1006         return true;
1007 }
1008
1009 static int mdt_open_by_fid_lock(struct mdt_thread_info *info,
1010                                 struct ldlm_reply *rep,
1011                                 struct mdt_lock_handle *lhc)
1012 {
1013         const struct lu_env     *env   = info->mti_env;
1014         struct mdt_device       *mdt   = info->mti_mdt;
1015         __u64                    flags = info->mti_spec.sp_cr_flags;
1016         struct mdt_reint_record *rr    = &info->mti_rr;
1017         struct md_attr          *ma    = &info->mti_attr;
1018         struct mdt_object       *parent= NULL;
1019         struct mdt_object       *o;
1020         int                      rc;
1021         int                      object_locked = 0;
1022         __u64                    ibits = 0;
1023         ENTRY;
1024
1025         if (md_should_create(flags) && !(flags & MDS_OPEN_HAS_EA)) {
1026                 if (!lu_fid_eq(rr->rr_fid1, rr->rr_fid2)) {
1027                         parent = mdt_object_find(env, mdt, rr->rr_fid1);
1028                         if (IS_ERR(parent)) {
1029                                 CDEBUG(D_INODE, "Fail to find parent "DFID
1030                                        " for anonymous created %ld, try to"
1031                                        " use server-side parent.\n",
1032                                        PFID(rr->rr_fid1), PTR_ERR(parent));
1033                                 parent = NULL;
1034                         }
1035                 }
1036                 if (parent == NULL)
1037                         ma->ma_need |= MA_PFID;
1038         }
1039
1040         o = mdt_object_find(env, mdt, rr->rr_fid2);
1041         if (IS_ERR(o))
1042                 GOTO(out_parent_put, rc = PTR_ERR(o));
1043
1044         if (mdt_object_remote(o)) {
1045                 CDEBUG(D_INFO, "%s: "DFID" is on remote MDT.\n",
1046                        mdt_obd_name(info->mti_mdt),
1047                        PFID(rr->rr_fid2));
1048                 GOTO(out, rc = -EREMOTE);
1049         } else if (!mdt_object_exists(o)) {
1050                 mdt_set_disposition(info, rep,
1051                                     DISP_IT_EXECD |
1052                                     DISP_LOOKUP_EXECD |
1053                                     DISP_LOOKUP_NEG);
1054                 GOTO(out, rc = -ENOENT);
1055         }
1056
1057         mdt_set_disposition(info, rep, (DISP_IT_EXECD | DISP_LOOKUP_EXECD));
1058
1059         mdt_prep_ma_buf_from_rep(info, o, ma);
1060         if (flags & MDS_OPEN_RELEASE)
1061                 ma->ma_need |= MA_HSM;
1062         rc = mdt_attr_get_complex(info, o, ma);
1063         if (rc)
1064                 GOTO(out, rc);
1065
1066         /* If a release request, check file flags are fine and ask for an
1067          * exclusive open access. */
1068         if (flags & MDS_OPEN_RELEASE && !mdt_hsm_release_allow(ma))
1069                 GOTO(out, rc = -EPERM);
1070
1071         rc = mdt_check_resent_lock(info, o, lhc);
1072         if (rc < 0) {
1073                 GOTO(out, rc);
1074         } else if (rc > 0) {
1075                 rc = mdt_object_open_lock(info, o, lhc, &ibits);
1076                 object_locked = 1;
1077                 if (rc)
1078                         GOTO(out_unlock, rc);
1079         }
1080
1081         if (ma->ma_valid & MA_PFID) {
1082                 parent = mdt_object_find(env, mdt, &ma->ma_pfid);
1083                 if (IS_ERR(parent)) {
1084                         CDEBUG(D_INODE, "Fail to find parent "DFID
1085                                " for anonymous created %ld, try to"
1086                                " use system default.\n",
1087                                PFID(&ma->ma_pfid), PTR_ERR(parent));
1088                         parent = NULL;
1089                 }
1090         }
1091
1092         rc = mdt_finish_open(info, parent, o, flags, 0, rep);
1093         if (!rc) {
1094                 mdt_set_disposition(info, rep, DISP_LOOKUP_POS);
1095                 if (flags & MDS_OPEN_LOCK)
1096                         mdt_set_disposition(info, rep, DISP_OPEN_LOCK);
1097                 if (flags & MDS_OPEN_LEASE)
1098                         mdt_set_disposition(info, rep, DISP_OPEN_LEASE);
1099         }
1100         GOTO(out_unlock, rc);
1101
1102 out_unlock:
1103         if (object_locked)
1104                 mdt_object_open_unlock(info, o, lhc, ibits, rc);
1105 out:
1106         mdt_object_put(env, o);
1107 out_parent_put:
1108         if (parent != NULL)
1109                 mdt_object_put(env, parent);
1110         return rc;
1111 }
1112
1113 /* Cross-ref request. Currently it can only be a pure open (w/o create) */
1114 static int mdt_cross_open(struct mdt_thread_info *info,
1115                           const struct lu_fid *parent_fid,
1116                           const struct lu_fid *fid,
1117                           struct ldlm_reply *rep, __u32 flags)
1118 {
1119         struct md_attr    *ma = &info->mti_attr;
1120         struct mdt_object *o;
1121         int                rc;
1122         ENTRY;
1123
1124         o = mdt_object_find(info->mti_env, info->mti_mdt, fid);
1125         if (IS_ERR(o))
1126                 RETURN(rc = PTR_ERR(o));
1127
1128         if (mdt_object_remote(o)) {
1129                 /* Something is wrong here, the object is on another MDS! */
1130                 CERROR("%s: "DFID" isn't on this server!: rc = %d\n",
1131                        mdt_obd_name(info->mti_mdt), PFID(fid), -EFAULT);
1132                 LU_OBJECT_DEBUG(D_WARNING, info->mti_env,
1133                                 &o->mot_obj,
1134                                 "Object isn't on this server! FLD error?\n");
1135                 rc = -EFAULT;
1136         } else {
1137                 if (mdt_object_exists(o)) {
1138                         /* Do permission check for cross-open. */
1139                         rc = mo_permission(info->mti_env, NULL,
1140                                            mdt_object_child(o),
1141                                            NULL, flags | MDS_OPEN_CROSS);
1142                         if (rc)
1143                                 goto out;
1144
1145                         mdt_prep_ma_buf_from_rep(info, o, ma);
1146                         rc = mdt_attr_get_complex(info, o, ma);
1147                         if (rc != 0)
1148                                 GOTO(out, rc);
1149
1150                         rc = mdt_finish_open(info, NULL, o, flags, 0, rep);
1151                 } else {
1152                         /*
1153                          * Something is wrong here. lookup was positive but
1154                          * there is no object!
1155                          */
1156                         CERROR("%s: "DFID" doesn't exist!: rc = %d\n",
1157                               mdt_obd_name(info->mti_mdt), PFID(fid), -EFAULT);
1158                         rc = -EFAULT;
1159                 }
1160         }
1161 out:
1162         mdt_object_put(info->mti_env, o);
1163         RETURN(rc);
1164 }
1165
1166 int mdt_reint_open(struct mdt_thread_info *info, struct mdt_lock_handle *lhc)
1167 {
1168         struct mdt_device       *mdt = info->mti_mdt;
1169         struct ptlrpc_request   *req = mdt_info_req(info);
1170         struct mdt_object       *parent;
1171         struct mdt_object       *child;
1172         struct mdt_lock_handle  *lh;
1173         struct ldlm_reply       *ldlm_rep;
1174         struct mdt_body         *repbody;
1175         struct lu_fid           *child_fid = &info->mti_tmp_fid1;
1176         struct md_attr          *ma = &info->mti_attr;
1177         __u64                    create_flags = info->mti_spec.sp_cr_flags;
1178         __u64                    ibits = 0;
1179         struct mdt_reint_record *rr = &info->mti_rr;
1180         int                      result, rc;
1181         int                      created = 0;
1182         int                      object_locked = 0;
1183         __u32                    msg_flags;
1184         ENTRY;
1185
1186         OBD_FAIL_TIMEOUT_ORSET(OBD_FAIL_MDS_PAUSE_OPEN, OBD_FAIL_ONCE,
1187                                (obd_timeout + 1) / 4);
1188
1189         mdt_counter_incr(req, LPROC_MDT_OPEN);
1190         repbody = req_capsule_server_get(info->mti_pill, &RMF_MDT_BODY);
1191
1192         ma->ma_need = MA_INODE;
1193         ma->ma_valid = 0;
1194
1195         LASSERT(info->mti_pill->rc_fmt == &RQF_LDLM_INTENT_OPEN);
1196         ldlm_rep = req_capsule_server_get(info->mti_pill, &RMF_DLM_REP);
1197
1198         if (unlikely(create_flags & MDS_OPEN_JOIN_FILE)) {
1199                 CERROR("file join is not supported anymore.\n");
1200                 GOTO(out, result = err_serious(-EOPNOTSUPP));
1201         }
1202         msg_flags = lustre_msg_get_flags(req->rq_reqmsg);
1203
1204         if ((create_flags & (MDS_OPEN_HAS_EA | MDS_OPEN_HAS_OBJS)) &&
1205             info->mti_spec.u.sp_ea.eadata == NULL)
1206                 GOTO(out, result = err_serious(-EINVAL));
1207
1208         CDEBUG(D_INODE, "I am going to open "DFID"/("DNAME"->"DFID") "
1209                "cr_flag="LPO64" mode=0%06o msg_flag=0x%x\n",
1210                PFID(rr->rr_fid1), PNAME(&rr->rr_name),
1211                PFID(rr->rr_fid2), create_flags,
1212                ma->ma_attr.la_mode, msg_flags);
1213
1214         if (info->mti_cross_ref) {
1215                 /* This is cross-ref open */
1216                 mdt_set_disposition(info, ldlm_rep,
1217                             (DISP_IT_EXECD | DISP_LOOKUP_EXECD |
1218                              DISP_LOOKUP_POS));
1219                 result = mdt_cross_open(info, rr->rr_fid2, rr->rr_fid1,
1220                                         ldlm_rep, create_flags);
1221                 GOTO(out, result);
1222         } else if (req_is_replay(req) ||
1223             (req->rq_export->exp_libclient && create_flags & MDS_OPEN_HAS_EA)) {
1224                 /* This is a replay request or from liblustre with ea. */
1225                 result = mdt_open_by_fid(info, ldlm_rep);
1226
1227                 if (result != -ENOENT) {
1228                         if (req->rq_export->exp_libclient &&
1229                             create_flags & MDS_OPEN_HAS_EA)
1230                                 GOTO(out, result = 0);
1231                         GOTO(out, result);
1232                 }
1233                 /* We didn't find the correct object, so we need to re-create it
1234                  * via a regular replay. */
1235                 if (!(create_flags & MDS_OPEN_CREAT)) {
1236                         DEBUG_REQ(D_ERROR, req,
1237                                   "OPEN & CREAT not in open replay/by_fid.");
1238                         GOTO(out, result = -EFAULT);
1239                 }
1240                 CDEBUG(D_INFO, "No object(1), continue as regular open.\n");
1241         } else if (create_flags & (MDS_OPEN_BY_FID | MDS_OPEN_LOCK)) {
1242                 /*
1243                  * MDS_OPEN_LOCK is checked for backward compatibility with 2.1
1244                  * client.
1245                  */
1246                 result = mdt_open_by_fid_lock(info, ldlm_rep, lhc);
1247                 if (result < 0)
1248                         CDEBUG(D_INFO, "no object for "DFID": %d\n",
1249                                PFID(rr->rr_fid2), result);
1250                 GOTO(out, result);
1251         }
1252
1253         if (OBD_FAIL_CHECK(OBD_FAIL_MDS_OPEN_PACK))
1254                 GOTO(out, result = err_serious(-ENOMEM));
1255
1256         mdt_set_disposition(info, ldlm_rep,
1257                             (DISP_IT_EXECD | DISP_LOOKUP_EXECD));
1258
1259         if (!lu_name_is_valid(&rr->rr_name))
1260                 GOTO(out, result = -EPROTO);
1261
1262         lh = &info->mti_lh[MDT_LH_PARENT];
1263         mdt_lock_pdo_init(lh,
1264                           (create_flags & MDS_OPEN_CREAT) ? LCK_PW : LCK_PR,
1265                           &rr->rr_name);
1266
1267         parent = mdt_object_find_lock(info, rr->rr_fid1, lh,
1268                                       MDS_INODELOCK_UPDATE);
1269         if (IS_ERR(parent))
1270                 GOTO(out, result = PTR_ERR(parent));
1271
1272         /* get and check version of parent */
1273         result = mdt_version_get_check(info, parent, 0);
1274         if (result)
1275                 GOTO(out_parent, result);
1276
1277         fid_zero(child_fid);
1278
1279         result = mdo_lookup(info->mti_env, mdt_object_child(parent),
1280                             &rr->rr_name, child_fid, &info->mti_spec);
1281
1282         LASSERTF(ergo(result == 0, fid_is_sane(child_fid)),
1283                  "looking for "DFID"/"DNAME", found FID = "DFID"\n",
1284                  PFID(mdt_object_fid(parent)), PNAME(&rr->rr_name),
1285                  PFID(child_fid));
1286
1287         if (result != 0 && result != -ENOENT && result != -ESTALE)
1288                 GOTO(out_parent, result);
1289
1290         if (result == -ENOENT || result == -ESTALE) {
1291                 mdt_set_disposition(info, ldlm_rep, DISP_LOOKUP_NEG);
1292                 if (result == -ESTALE) {
1293                         /*
1294                          * -ESTALE means the parent is a dead(unlinked) dir, so
1295                          * it should return -ENOENT to in accordance with the
1296                          * original mds implementaion.
1297                          */
1298                         GOTO(out_parent, result = -ENOENT);
1299                 }
1300                 if (!(create_flags & MDS_OPEN_CREAT))
1301                         GOTO(out_parent, result);
1302                 if (exp_connect_flags(req->rq_export) & OBD_CONNECT_RDONLY)
1303                         GOTO(out_parent, result = -EROFS);
1304                 *child_fid = *info->mti_rr.rr_fid2;
1305                 LASSERTF(fid_is_sane(child_fid), "fid="DFID"\n",
1306                          PFID(child_fid));
1307                 /* In the function below, .hs_keycmp resolves to
1308                  * lu_obj_hop_keycmp() */
1309                 /* coverity[overrun-buffer-val] */
1310                 child = mdt_object_new(info->mti_env, mdt, child_fid);
1311         } else {
1312                 /*
1313                  * Check for O_EXCL is moved to the mdt_finish_open(), we need to
1314                  * return FID back in that case.
1315                  */
1316                 mdt_set_disposition(info, ldlm_rep, DISP_LOOKUP_POS);
1317                 child = mdt_object_find(info->mti_env, mdt, child_fid);
1318         }
1319         if (IS_ERR(child))
1320                 GOTO(out_parent, result = PTR_ERR(child));
1321
1322         /** check version of child  */
1323         rc = mdt_version_get_check(info, child, 1);
1324         if (rc)
1325                 GOTO(out_child, result = rc);
1326
1327         if (result == -ENOENT) {
1328                 /* Create under OBF and .lustre is not permitted */
1329                 if (!fid_is_md_operative(rr->rr_fid1))
1330                         GOTO(out_child, result = -EPERM);
1331
1332                 /* save versions in reply */
1333                 mdt_version_get_save(info, parent, 0);
1334                 mdt_version_get_save(info, child, 1);
1335
1336                 /* version of child will be changed */
1337                 tgt_vbr_obj_set(info->mti_env, mdt_obj2dt(child));
1338
1339                 /* Not found and with MDS_OPEN_CREAT: let's create it. */
1340                 mdt_set_disposition(info, ldlm_rep, DISP_OPEN_CREATE);
1341
1342                 /* Let lower layers know what is lock mode on directory. */
1343                 info->mti_spec.sp_cr_mode =
1344                         mdt_dlm_mode2mdl_mode(lh->mlh_pdo_mode);
1345
1346                 /*
1347                  * Do not perform lookup sanity check. We know that name does
1348                  * not exist.
1349                  */
1350                 info->mti_spec.sp_cr_lookup = 0;
1351                 info->mti_spec.sp_feat = &dt_directory_features;
1352
1353                 result = mdo_create(info->mti_env,
1354                                     mdt_object_child(parent),
1355                                     &rr->rr_name,
1356                                     mdt_object_child(child),
1357                                     &info->mti_spec,
1358                                     &info->mti_attr);
1359                 if (result == -ERESTART) {
1360                         mdt_clear_disposition(info, ldlm_rep, DISP_OPEN_CREATE);
1361                         GOTO(out_child, result);
1362                 } else {
1363                         mdt_prep_ma_buf_from_rep(info, child, ma);
1364                         /* XXX: we should call this once, see few lines below */
1365                         if (result == 0)
1366                                 result = mdt_attr_get_complex(info, child, ma);
1367
1368                         if (result != 0)
1369                                 GOTO(out_child, result);
1370                 }
1371                 created = 1;
1372         } else {
1373                 /*
1374                  * The object is on remote node, return its FID for remote open.
1375                  */
1376                 if (mdt_object_remote(child)) {
1377                         /*
1378                          * Check if this lock already was sent to client and
1379                          * this is resent case. For resent case do not take lock
1380                          * again, use what is already granted.
1381                          */
1382                         LASSERT(lhc != NULL);
1383
1384                         rc = mdt_check_resent_lock(info, child, lhc);
1385                         if (rc < 0) {
1386                                 GOTO(out_child, result = rc);
1387                         } else if (rc > 0) {
1388                                 mdt_lock_handle_init(lhc);
1389                                 mdt_lock_reg_init(lhc, LCK_PR);
1390
1391                                 rc = mdt_object_lock(info, child, lhc,
1392                                                      MDS_INODELOCK_LOOKUP,
1393                                                      MDT_CROSS_LOCK);
1394                         }
1395                         repbody->mbo_fid1 = *mdt_object_fid(child);
1396                         repbody->mbo_valid |= (OBD_MD_FLID | OBD_MD_MDS);
1397                         if (rc != 0)
1398                                 result = rc;
1399                         else
1400                                 result = -MDT_EREMOTE_OPEN;
1401                         GOTO(out_child, result);
1402                 } else if (mdt_object_exists(child)) {
1403                         /* We have to get attr & LOV EA & HSM for this
1404                          * object. */
1405                         mdt_prep_ma_buf_from_rep(info, child, ma);
1406                         ma->ma_need |= MA_HSM;
1407                         result = mdt_attr_get_complex(info, child, ma);
1408                         if (result != 0)
1409                                 GOTO(out_child, result);
1410                 } else {
1411                         /* Object does not exist. Likely FS corruption. */
1412                         CERROR("%s: name '"DNAME"' present, but FID "
1413                                DFID" is invalid\n", mdt_obd_name(info->mti_mdt),
1414                                PNAME(&rr->rr_name), PFID(child_fid));
1415                         GOTO(out_child, result = -EIO);
1416                 }
1417         }
1418
1419         rc = mdt_check_resent_lock(info, child, lhc);
1420         if (rc < 0) {
1421                 GOTO(out_child, result = rc);
1422         } else if (rc == 0) {
1423                 /* the open lock might already be gotten in
1424                  * ldlm_handle_enqueue() */
1425                 LASSERT(lustre_msg_get_flags(req->rq_reqmsg) & MSG_RESENT);
1426                 if (create_flags & MDS_OPEN_LOCK)
1427                         mdt_set_disposition(info, ldlm_rep, DISP_OPEN_LOCK);
1428         } else {
1429                 /* get openlock if this isn't replay and client requested it */
1430                 if (!req_is_replay(req)) {
1431                         rc = mdt_object_open_lock(info, child, lhc, &ibits);
1432                         object_locked = 1;
1433                         if (rc != 0)
1434                                 GOTO(out_child_unlock, result = rc);
1435                         else if (create_flags & MDS_OPEN_LOCK)
1436                                 mdt_set_disposition(info, ldlm_rep,
1437                                                     DISP_OPEN_LOCK);
1438                 }
1439         }
1440         /* Try to open it now. */
1441         rc = mdt_finish_open(info, parent, child, create_flags,
1442                              created, ldlm_rep);
1443         if (rc) {
1444                 result = rc;
1445                 /* openlock will be released if mdt_finish_open failed */
1446                 mdt_clear_disposition(info, ldlm_rep, DISP_OPEN_LOCK);
1447
1448                 if (created && create_flags & MDS_OPEN_VOLATILE) {
1449                         CERROR("%s: cannot open volatile file "DFID", orphan "
1450                                "file will be left in PENDING directory until "
1451                                "next reboot, rc = %d\n", mdt_obd_name(mdt),
1452                                PFID(mdt_object_fid(child)), rc);
1453                         GOTO(out_child_unlock, result);
1454                 }
1455
1456                 if (created) {
1457                         ma->ma_need = 0;
1458                         ma->ma_valid = 0;
1459                         rc = mdo_unlink(info->mti_env,
1460                                         mdt_object_child(parent),
1461                                         mdt_object_child(child),
1462                                         &rr->rr_name,
1463                                         &info->mti_attr, 0);
1464                         if (rc != 0)
1465                                 CERROR("%s: "DFID" cleanup of open: rc = %d\n",
1466                                        mdt_obd_name(info->mti_mdt),
1467                                        PFID(mdt_object_fid(child)), rc);
1468                         mdt_clear_disposition(info, ldlm_rep, DISP_OPEN_CREATE);
1469                 }
1470         }
1471         EXIT;
1472 out_child_unlock:
1473         if (object_locked)
1474                 mdt_object_open_unlock(info, child, lhc, ibits, result);
1475 out_child:
1476         mdt_object_put(info->mti_env, child);
1477 out_parent:
1478         mdt_object_unlock_put(info, parent, lh, result || !created);
1479 out:
1480         if (result)
1481                 lustre_msg_set_transno(req->rq_repmsg, 0);
1482         return result;
1483 }
1484
1485 /**
1486  * Create an orphan object use local root.
1487  */
1488 static struct mdt_object *mdt_orphan_open(struct mdt_thread_info *info,
1489                                           struct mdt_device *mdt,
1490                                           const struct lu_fid *fid,
1491                                           struct md_attr *attr, fmode_t fmode)
1492 {
1493         const struct lu_env *env = info->mti_env;
1494         struct md_op_spec *spec = &info->mti_spec;
1495         struct lu_fid *local_root_fid = &info->mti_tmp_fid1;
1496         struct mdt_object *obj = NULL;
1497         struct mdt_object *local_root;
1498         static const struct lu_name lname = {
1499                 .ln_name = "i_am_nobody",
1500                 .ln_namelen = sizeof("i_am_nobody") - 1,
1501         };
1502         struct lu_ucred *uc;
1503         cfs_cap_t uc_cap_save;
1504         int rc;
1505         ENTRY;
1506
1507         rc = dt_root_get(env, mdt->mdt_bottom, local_root_fid);
1508         if (rc != 0)
1509                 RETURN(ERR_PTR(rc));
1510
1511         local_root = mdt_object_find(env, mdt, local_root_fid);
1512         if (IS_ERR(local_root))
1513                 RETURN(local_root);
1514
1515         obj = mdt_object_new(env, mdt, fid);
1516         if (IS_ERR(obj))
1517                 GOTO(out, rc = PTR_ERR(obj));
1518
1519         spec->sp_cr_lookup = 0;
1520         spec->sp_feat = &dt_directory_features;
1521         spec->sp_cr_mode = MDL_MINMODE; /* no lock */
1522         spec->sp_cr_flags = MDS_OPEN_VOLATILE | fmode;
1523         if (attr->ma_valid & MA_LOV) {
1524                 spec->u.sp_ea.eadata = attr->ma_lmm;
1525                 spec->u.sp_ea.eadatalen = attr->ma_lmm_size;
1526                 spec->sp_cr_flags |= MDS_OPEN_HAS_EA;
1527         } else {
1528                 spec->sp_cr_flags |= MDS_OPEN_DELAY_CREATE;
1529         }
1530
1531         uc = lu_ucred(env);
1532         uc_cap_save = uc->uc_cap;
1533         uc->uc_cap |= 1 << CFS_CAP_DAC_OVERRIDE;
1534         rc = mdo_create(env, mdt_object_child(local_root), &lname,
1535                         mdt_object_child(obj), spec, attr);
1536         uc->uc_cap = uc_cap_save;
1537         if (rc < 0) {
1538                 CERROR("%s: cannot create volatile file "DFID": rc = %d\n",
1539                        mdt_obd_name(mdt), PFID(fid), rc);
1540                 GOTO(out, rc);
1541         }
1542
1543         rc = mo_open(env, mdt_object_child(obj), MDS_OPEN_CREATED);
1544         if (rc < 0)
1545                 CERROR("%s: cannot open volatile file "DFID", orphan "
1546                        "file will be left in PENDING directory until "
1547                        "next reboot, rc = %d\n", mdt_obd_name(mdt),
1548                        PFID(fid), rc);
1549         GOTO(out, rc);
1550
1551 out:
1552         if (rc < 0) {
1553                 if (!IS_ERR(obj))
1554                         mdt_object_put(env, obj);
1555                 obj = ERR_PTR(rc);
1556         }
1557         mdt_object_put(env, local_root);
1558         return obj;
1559 }
1560
1561 static int mdt_hsm_release(struct mdt_thread_info *info, struct mdt_object *o,
1562                            struct md_attr *ma)
1563 {
1564         struct mdt_lock_handle *lh = &info->mti_lh[MDT_LH_LAYOUT];
1565         struct close_data      *data;
1566         struct ldlm_lock       *lease;
1567         struct mdt_object      *orphan;
1568         struct md_attr         *orp_ma;
1569         struct lu_buf          *buf;
1570         bool                    lease_broken;
1571         int                     rc;
1572         int                     rc2;
1573         ENTRY;
1574
1575         if (exp_connect_flags(info->mti_exp) & OBD_CONNECT_RDONLY)
1576                 RETURN(-EROFS);
1577
1578         data = req_capsule_client_get(info->mti_pill, &RMF_CLOSE_DATA);
1579         if (data == NULL)
1580                 RETURN(-EPROTO);
1581
1582         lease = ldlm_handle2lock(&data->cd_handle);
1583         if (lease == NULL)
1584                 RETURN(-ESTALE);
1585
1586         /* try to hold open_sem so that nobody else can open the file */
1587         if (!down_write_trylock(&o->mot_open_sem)) {
1588                 ldlm_lock_cancel(lease);
1589                 GOTO(out_reprocess, rc = -EBUSY);
1590         }
1591
1592         /* Check if the lease open lease has already canceled */
1593         lock_res_and_lock(lease);
1594         lease_broken = ldlm_is_cancel(lease);
1595         unlock_res_and_lock(lease);
1596
1597         LDLM_DEBUG(lease, DFID " lease broken? %d\n",
1598                    PFID(mdt_object_fid(o)), lease_broken);
1599
1600         /* Cancel server side lease. Client side counterpart should
1601          * have been cancelled. It's okay to cancel it now as we've
1602          * held mot_open_sem. */
1603         ldlm_lock_cancel(lease);
1604
1605         if (lease_broken) /* don't perform release task */
1606                 GOTO(out_unlock, rc = -ESTALE);
1607
1608         if (fid_is_zero(&data->cd_fid) || !fid_is_sane(&data->cd_fid))
1609                 GOTO(out_unlock, rc = -EINVAL);
1610
1611         /* ma_need was set before but it seems fine to change it in order to
1612          * avoid modifying the one from RPC */
1613         ma->ma_need = MA_HSM;
1614         rc = mdt_attr_get_complex(info, o, ma);
1615         if (rc != 0)
1616                 GOTO(out_unlock, rc);
1617
1618         if (!mdt_hsm_release_allow(ma))
1619                 GOTO(out_unlock, rc = -EPERM);
1620
1621         /* already released? */
1622         if (ma->ma_hsm.mh_flags & HS_RELEASED)
1623                 GOTO(out_unlock, rc = 0);
1624
1625         /* Compare on-disk and packed data_version */
1626         if (data->cd_data_version != ma->ma_hsm.mh_arch_ver) {
1627                 CDEBUG(D_HSM, DFID" data_version mismatches: packed="LPU64
1628                        " and on-disk="LPU64"\n", PFID(mdt_object_fid(o)),
1629                        data->cd_data_version, ma->ma_hsm.mh_arch_ver);
1630                 GOTO(out_unlock, rc = -EPERM);
1631         }
1632
1633         ma->ma_valid = MA_INODE;
1634         ma->ma_attr.la_valid &= LA_ATIME | LA_MTIME | LA_CTIME | LA_SIZE;
1635         rc = mo_attr_set(info->mti_env, mdt_object_child(o), ma);
1636         if (rc < 0)
1637                 GOTO(out_unlock, rc);
1638
1639         ma->ma_need = MA_INODE | MA_LOV;
1640         rc = mdt_attr_get_complex(info, o, ma);
1641         if (rc < 0)
1642                 GOTO(out_unlock, rc);
1643
1644         if (!(ma->ma_valid & MA_LOV)) {
1645                 /* Even empty file are released */
1646                 memset(ma->ma_lmm, 0, sizeof(*ma->ma_lmm));
1647                 ma->ma_lmm->lmm_magic = cpu_to_le32(LOV_MAGIC_V1_DEF);
1648                 ma->ma_lmm->lmm_pattern = cpu_to_le32(LOV_PATTERN_RAID0);
1649                 ma->ma_lmm->lmm_stripe_size = cpu_to_le32(LOV_MIN_STRIPE_SIZE);
1650                 ma->ma_lmm_size = sizeof(*ma->ma_lmm);
1651         } else {
1652                 /* Magic must be LOV_MAGIC_Vx_DEF otherwise LOD will interpret
1653                  * ma_lmm as lov_user_md, then it will be confused by union of
1654                  * layout_gen and stripe_offset. */
1655                 if (le32_to_cpu(ma->ma_lmm->lmm_magic) == LOV_MAGIC_V1)
1656                         ma->ma_lmm->lmm_magic = cpu_to_le32(LOV_MAGIC_V1_DEF);
1657                 else if (le32_to_cpu(ma->ma_lmm->lmm_magic) == LOV_MAGIC_V3)
1658                         ma->ma_lmm->lmm_magic = cpu_to_le32(LOV_MAGIC_V3_DEF);
1659                 else
1660                         GOTO(out_unlock, rc = -EINVAL);
1661         }
1662
1663         /* Set file as released */
1664         ma->ma_lmm->lmm_pattern |= cpu_to_le32(LOV_PATTERN_F_RELEASED);
1665
1666         orp_ma = &info->mti_u.hsm.attr;
1667         orp_ma->ma_attr.la_mode = S_IFREG | S_IWUSR;
1668         orp_ma->ma_attr.la_uid = ma->ma_attr.la_uid;
1669         orp_ma->ma_attr.la_gid = ma->ma_attr.la_gid;
1670         orp_ma->ma_attr.la_valid = LA_MODE | LA_UID | LA_GID;
1671         orp_ma->ma_lmm = ma->ma_lmm;
1672         orp_ma->ma_lmm_size = ma->ma_lmm_size;
1673         orp_ma->ma_valid = MA_INODE | MA_LOV;
1674         orphan = mdt_orphan_open(info, info->mti_mdt, &data->cd_fid, orp_ma,
1675                                  FMODE_WRITE);
1676         if (IS_ERR(orphan)) {
1677                 CERROR("%s: cannot open orphan file "DFID": rc = %ld\n",
1678                        mdt_obd_name(info->mti_mdt), PFID(&data->cd_fid),
1679                        PTR_ERR(orphan));
1680                 GOTO(out_unlock, rc = PTR_ERR(orphan));
1681         }
1682
1683         /* Set up HSM attribute for orphan object */
1684         CLASSERT(sizeof(struct hsm_attrs) <= sizeof(info->mti_xattr_buf));
1685         buf = &info->mti_buf;
1686         buf->lb_buf = info->mti_xattr_buf;
1687         buf->lb_len = sizeof(struct hsm_attrs);
1688         ma->ma_hsm.mh_flags |= HS_RELEASED;
1689         lustre_hsm2buf(buf->lb_buf, &ma->ma_hsm);
1690         ma->ma_hsm.mh_flags &= ~HS_RELEASED;
1691
1692         mdt_lock_reg_init(lh, LCK_EX);
1693         rc = mdt_object_lock(info, o, lh, MDS_INODELOCK_LAYOUT |
1694                              MDS_INODELOCK_XATTR, MDT_LOCAL_LOCK);
1695         if (rc != 0)
1696                 GOTO(out_close, rc);
1697
1698         rc = mo_xattr_set(info->mti_env, mdt_object_child(orphan), buf,
1699                           XATTR_NAME_HSM, 0);
1700
1701         if (rc == 0)
1702                 /* Swap layout with orphan object */
1703                 rc = mo_swap_layouts(info->mti_env, mdt_object_child(o),
1704                                      mdt_object_child(orphan),
1705                                      SWAP_LAYOUTS_MDS_HSM);
1706
1707         /* Release exclusive LL */
1708         mdt_object_unlock(info, o, lh, 1);
1709
1710         EXIT;
1711
1712 out_close:
1713         /* Close orphan object anyway */
1714         rc2 = mo_close(info->mti_env, mdt_object_child(orphan), orp_ma,
1715                        FMODE_WRITE);
1716         if (rc2 < 0)
1717                 CERROR("%s: error closing volatile file "DFID": rc = %d\n",
1718                        mdt_obd_name(info->mti_mdt), PFID(&data->cd_fid), rc2);
1719         LU_OBJECT_DEBUG(D_HSM, info->mti_env, &orphan->mot_obj,
1720                         "object closed\n");
1721         mdt_object_put(info->mti_env, orphan);
1722
1723 out_unlock:
1724         up_write(&o->mot_open_sem);
1725
1726         if (rc == 0) { /* already released */
1727                 struct mdt_body *repbody;
1728                 repbody = req_capsule_server_get(info->mti_pill, &RMF_MDT_BODY);
1729                 LASSERT(repbody != NULL);
1730                 repbody->mbo_valid |= OBD_MD_FLRELEASED;
1731         }
1732
1733 out_reprocess:
1734         ldlm_reprocess_all(lease->l_resource);
1735         LDLM_LOCK_PUT(lease);
1736
1737         ma->ma_valid = 0;
1738         ma->ma_need = 0;
1739
1740         return rc;
1741 }
1742
1743 #define MFD_CLOSED(mode) ((mode) == MDS_FMODE_CLOSED)
1744
1745 static int mdt_mfd_closed(struct mdt_file_data *mfd)
1746 {
1747         return ((mfd == NULL) || MFD_CLOSED(mfd->mfd_mode));
1748 }
1749
1750 int mdt_mfd_close(struct mdt_thread_info *info, struct mdt_file_data *mfd)
1751 {
1752         struct mdt_object *o = mfd->mfd_object;
1753         struct md_object *next = mdt_object_child(o);
1754         struct md_attr *ma = &info->mti_attr;
1755         int rc = 0;
1756         __u64 mode;
1757         ENTRY;
1758
1759         mode = mfd->mfd_mode;
1760
1761         if (ma->ma_attr_flags & MDS_HSM_RELEASE) {
1762                 rc = mdt_hsm_release(info, o, ma);
1763                 if (rc < 0) {
1764                         CDEBUG(D_HSM, "%s: File " DFID " release failed: %d\n",
1765                                 mdt_obd_name(info->mti_mdt),
1766                                 PFID(mdt_object_fid(o)), rc);
1767                         /* continue to close even error occurred. */
1768                 }
1769         }
1770
1771         if (mode & FMODE_WRITE)
1772                 mdt_write_put(o);
1773         else if (mode & MDS_FMODE_EXEC)
1774                 mdt_write_allow(o);
1775
1776         /* Update atime on close only. */
1777         if ((mode & MDS_FMODE_EXEC || mode & FMODE_READ || mode & FMODE_WRITE)
1778             && (ma->ma_valid & MA_INODE) && (ma->ma_attr.la_valid & LA_ATIME)) {
1779                 /* Set the atime only. */
1780                 ma->ma_valid = MA_INODE;
1781                 ma->ma_attr.la_valid = LA_ATIME;
1782                 rc = mo_attr_set(info->mti_env, next, ma);
1783         }
1784
1785         /* If file data is modified, add the dirty flag. */
1786         if (ma->ma_attr_flags & MDS_DATA_MODIFIED)
1787                 rc = mdt_add_dirty_flag(info, o, ma);
1788
1789         ma->ma_need |= MA_INODE;
1790         ma->ma_valid &= ~MA_INODE;
1791
1792         if (!MFD_CLOSED(mode))
1793                 rc = mo_close(info->mti_env, next, ma, mode);
1794
1795         /* adjust open and lease count */
1796         if (mode & MDS_OPEN_LEASE) {
1797                 LASSERT(atomic_read(&o->mot_lease_count) > 0);
1798                 atomic_dec(&o->mot_lease_count);
1799         }
1800
1801         LASSERT(atomic_read(&o->mot_open_count) > 0);
1802         atomic_dec(&o->mot_open_count);
1803         mdt_mfd_free(mfd);
1804         mdt_object_put(info->mti_env, o);
1805
1806         RETURN(rc);
1807 }
1808
1809 int mdt_close(struct tgt_session_info *tsi)
1810 {
1811         struct mdt_thread_info  *info = tsi2mdt_info(tsi);
1812         struct ptlrpc_request   *req = tgt_ses_req(tsi);
1813         struct mdt_export_data *med;
1814         struct mdt_file_data   *mfd;
1815         struct mdt_object      *o;
1816         struct md_attr         *ma = &info->mti_attr;
1817         struct mdt_body        *repbody = NULL;
1818         int rc, ret = 0;
1819         ENTRY;
1820
1821         mdt_counter_incr(req, LPROC_MDT_CLOSE);
1822         /* Close may come with the Size-on-MDS update. Unpack it. */
1823         rc = mdt_close_unpack(info);
1824         if (rc)
1825                 GOTO(out, rc = err_serious(rc));
1826
1827         /* These fields are no longer used and are left for compatibility.
1828          * size is always zero */
1829         req_capsule_set_size(info->mti_pill, &RMF_MDT_MD, RCL_SERVER,
1830                              0);
1831         req_capsule_set_size(info->mti_pill, &RMF_LOGCOOKIES, RCL_SERVER,
1832                              0);
1833         rc = req_capsule_server_pack(info->mti_pill);
1834         if (mdt_check_resent(info, mdt_reconstruct_generic, NULL)) {
1835                 mdt_client_compatibility(info);
1836                 if (rc == 0)
1837                         mdt_fix_reply(info);
1838                 mdt_exit_ucred(info);
1839                 GOTO(out, rc = lustre_msg_get_status(req->rq_repmsg));
1840         }
1841
1842         /* Continue to close handle even if we can not pack reply */
1843         if (rc == 0) {
1844                 repbody = req_capsule_server_get(info->mti_pill,
1845                                                  &RMF_MDT_BODY);
1846                 ma->ma_lmm = req_capsule_server_get(info->mti_pill,
1847                                                     &RMF_MDT_MD);
1848                 ma->ma_lmm_size = req_capsule_get_size(info->mti_pill,
1849                                                        &RMF_MDT_MD,
1850                                                        RCL_SERVER);
1851                 ma->ma_need = MA_INODE | MA_LOV | MA_COOKIE;
1852                 repbody->mbo_eadatasize = 0;
1853                 repbody->mbo_aclsize = 0;
1854         } else {
1855                 rc = err_serious(rc);
1856         }
1857
1858         med = &req->rq_export->exp_mdt_data;
1859         spin_lock(&med->med_open_lock);
1860         mfd = mdt_handle2mfd(med, &info->mti_close_handle, req_is_replay(req));
1861         if (mdt_mfd_closed(mfd)) {
1862                 spin_unlock(&med->med_open_lock);
1863                 CDEBUG(D_INODE, "no handle for file close: fid = "DFID
1864                        ": cookie = "LPX64"\n", PFID(info->mti_rr.rr_fid1),
1865                        info->mti_close_handle.cookie);
1866                 /** not serious error since bug 3633 */
1867                 rc = -ESTALE;
1868         } else {
1869                 class_handle_unhash(&mfd->mfd_handle);
1870                 list_del_init(&mfd->mfd_list);
1871                 spin_unlock(&med->med_open_lock);
1872
1873                 /* Do not lose object before last unlink. */
1874                 o = mfd->mfd_object;
1875                 mdt_object_get(info->mti_env, o);
1876                 ret = mdt_mfd_close(info, mfd);
1877                 if (repbody != NULL)
1878                         rc = mdt_handle_last_unlink(info, o, ma);
1879                 mdt_empty_transno(info, rc);
1880                 mdt_object_put(info->mti_env, o);
1881         }
1882         if (repbody != NULL) {
1883                 mdt_client_compatibility(info);
1884                 rc = mdt_fix_reply(info);
1885         }
1886
1887         mdt_exit_ucred(info);
1888         if (OBD_FAIL_CHECK(OBD_FAIL_MDS_CLOSE_PACK))
1889                 GOTO(out, rc = err_serious(-ENOMEM));
1890
1891         if (OBD_FAIL_CHECK_RESET(OBD_FAIL_MDS_CLOSE_NET_REP,
1892                                  OBD_FAIL_MDS_CLOSE_NET_REP))
1893                 tsi->tsi_reply_fail_id = OBD_FAIL_MDS_CLOSE_NET_REP;
1894 out:
1895         mdt_thread_info_fini(info);
1896         RETURN(rc ? rc : ret);
1897 }