lustre/mds/mds_open.c

   1 /* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
   2  * vim:expandtab:shiftwidth=8:tabstop=8:
   3  *
   4  *  Copyright (c) 2003 Cluster File Systems, Inc.
   5  *   Author: Peter Braam <braam@clusterfs.com>
   6  *   Author: Andreas Dilger <adilger@clusterfs.com>
   7  *   Author: Phil Schwan <phil@clusterfs.com>
   8  *   Author: Mike Shaver <shaver@clusterfs.com>
   9  *
  10  *   This file is part of Lustre, http://www.lustre.org.
  11  *
  12  *   Lustre is free software; you can redistribute it and/or
  13  *   modify it under the terms of version 2 of the GNU General Public
  14  *   License as published by the Free Software Foundation.
  15  *
  16  *   Lustre is distributed in the hope that it will be useful,
  17  *   but WITHOUT ANY WARRANTY; without even the implied warranty of
  18  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  19  *   GNU General Public License for more details.
  20  *
  21  *   You should have received a copy of the GNU General Public License
  22  *   along with Lustre; if not, write to the Free Software
  23  *   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  24  */
  25
  26 #ifndef EXPORT_SYMTAB
  27 # define EXPORT_SYMTAB
  28 #endif
  29 #define DEBUG_SUBSYSTEM S_MDS
  30
  31 #include <linux/version.h>
  32 #include <linux/module.h>
  33 #include <linux/init.h>
  34 #include <linux/version.h>
  35 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,5,0))
  36 # include <linux/buffer_head.h>
  37 # include <linux/workqueue.h>
  38 #else
  39 # include <linux/locks.h>
  40 #endif
  41
  42 #include <linux/obd_class.h>
  43 #include <linux/obd_lov.h>
  44 #include <linux/lustre_fsfilt.h>
  45 #include <linux/lprocfs_status.h>
  46
  47 #include "mds_internal.h"
  48
  49 /* Exported function from this file are:
  50  *
  51  * mds_open - called by the intent handler
  52  * mds_close - an rpc handling function
  53  * mds_pin - an rpc handling function - which will go away
  54  * mds_mfd_close - for force closing files when a client dies
  55  */
  56
  57 /*
  58  * MDS file data handling: file data holds a handle for a file opened
  59  * by a client.
  60  */
  61
  62 static void mds_mfd_addref(void *mfdp)
  63 {
  64         struct mds_file_data *mfd = mfdp;
  65
  66         atomic_inc(&mfd->mfd_refcount);
  67         CDEBUG(D_INFO, "GETting mfd %p : new refcount %d\n", mfd,
  68                atomic_read(&mfd->mfd_refcount));
  69 }
  70
  71 struct mds_file_data *mds_mfd_new(void)
  72 {
  73         struct mds_file_data *mfd;
  74
  75         OBD_ALLOC(mfd, sizeof *mfd);
  76         if (mfd == NULL) {
  77                 CERROR("mds: out of memory\n");
  78                 return NULL;
  79         }
  80
  81         atomic_set(&mfd->mfd_refcount, 2);
  82
  83         INIT_LIST_HEAD(&mfd->mfd_handle.h_link);
  84         class_handle_hash(&mfd->mfd_handle, mds_mfd_addref);
  85
  86         return mfd;
  87 }
  88
  89 static struct mds_file_data *mds_handle2mfd(struct lustre_handle *handle)
  90 {
  91         ENTRY;
  92         LASSERT(handle != NULL);
  93         RETURN(class_handle2object(handle->cookie));
  94 }
  95
  96 static void mds_mfd_put(struct mds_file_data *mfd)
  97 {
  98         CDEBUG(D_INFO, "PUTting mfd %p : new refcount %d\n", mfd,
  99                atomic_read(&mfd->mfd_refcount) - 1);
 100         LASSERT(atomic_read(&mfd->mfd_refcount) > 0 &&
 101                 atomic_read(&mfd->mfd_refcount) < 0x5a5a);
 102         if (atomic_dec_and_test(&mfd->mfd_refcount)) {
 103                 LASSERT(list_empty(&mfd->mfd_handle.h_link));
 104                 OBD_FREE(mfd, sizeof *mfd);
 105         }
 106 }
 107
 108 static void mds_mfd_destroy(struct mds_file_data *mfd)
 109 {
 110         class_handle_unhash(&mfd->mfd_handle);
 111         mds_mfd_put(mfd);
 112 }
 113
 114 #ifdef IFILTERDATA_ACTUALLY_USED
 115 /* Caller must hold mds->mds_epoch_sem */
 116 static int mds_alloc_filterdata(struct inode *inode)
 117 {
 118         LASSERT(inode->i_filterdata == NULL);
 119         OBD_ALLOC(inode->i_filterdata, sizeof(struct mds_filter_data));
 120         if (inode->i_filterdata == NULL)
 121                 return -ENOMEM;
 122         LASSERT(igrab(inode) == inode);
 123         return 0;
 124 }
 125
 126 /* Caller must hold mds->mds_epoch_sem */
 127 static void mds_free_filterdata(struct inode *inode)
 128 {
 129         LASSERT(inode->i_filterdata != NULL);
 130         OBD_FREE(inode->i_filterdata, sizeof(struct mds_filter_data));
 131         inode->i_filterdata = NULL;
 132         iput(inode);
 133 }
 134 #endif /*IFILTERDATA_ACTUALLY_USED*/
 135
 136 /* Write access to a file: executors cause a negative count,
 137  * writers a positive count.  The semaphore is needed to perform
 138  * a check for the sign and then increment or decrement atomically.
 139  *
 140  * This code is closely tied to the allocation of the d_fsdata and the
 141  * MDS epoch, so we use the same semaphore for the whole lot.
 142  *
 143  * We could use a different semaphore for each file, if it ever shows
 144  * up in a profile, which it won't.
 145  *
 146  * epoch argument is nonzero during recovery */
 147 static int mds_get_write_access(struct mds_obd *mds, struct inode *inode,
 148                                 __u64 epoch)
 149 {
 150         int rc = 0;
 151
 152         down(&mds->mds_epoch_sem);
 153
 154         if (atomic_read(&inode->i_writecount) < 0) {
 155                 up(&mds->mds_epoch_sem);
 156                 RETURN(-ETXTBSY);
 157         }
 158
 159 #ifdef IFILTERDATA_ACTUALLY_USED
 160         if (MDS_FILTERDATA(inode) && MDS_FILTERDATA(inode)->io_epoch != 0) {
 161                 CDEBUG(D_INODE, "continuing MDS epoch "LPU64" for ino %lu/%u\n",
 162                        MDS_FILTERDATA(inode)->io_epoch, inode->i_ino,
 163                        inode->i_generation);
 164                 goto out;
 165         }
 166
 167         if (inode->i_filterdata == NULL)
 168                 mds_alloc_filterdata(inode);
 169         if (inode->i_filterdata == NULL) {
 170                 rc = -ENOMEM;
 171                 goto out;
 172         }
 173 #endif /*IFILTERDATA_ACTUALLY_USED*/
 174         if (epoch > mds->mds_io_epoch)
 175                 mds->mds_io_epoch = epoch;
 176         else
 177                 mds->mds_io_epoch++;
 178 #ifdef IFILTERDATA_ACTUALLY_USED
 179         MDS_FILTERDATA(inode)->io_epoch = mds->mds_io_epoch;
 180         CDEBUG(D_INODE, "starting MDS epoch "LPU64" for ino %lu/%u\n",
 181                mds->mds_io_epoch, inode->i_ino, inode->i_generation);
 182  out:
 183 #endif /*IFILTERDATA_ACTUALLY_USED*/
 184         if (rc == 0)
 185                 atomic_inc(&inode->i_writecount);
 186         up(&mds->mds_epoch_sem);
 187         return rc;
 188 }
 189
 190 /* Returns EAGAIN if the client needs to get size and/or cookies and close
 191  * again -- which is never true if the file is about to be unlinked.  Otherwise
 192  * returns the number of remaining writers. */
 193 static int mds_put_write_access(struct mds_obd *mds, struct inode *inode,
 194                                 struct mds_body *body, int unlinking)
 195 {
 196         int rc = 0;
 197         ENTRY;
 198
 199         down(&mds->mds_epoch_sem);
 200         atomic_dec(&inode->i_writecount);
 201         rc = atomic_read(&inode->i_writecount);
 202         if (rc > 0)
 203                 GOTO(out, rc);
 204 #if 0
 205         if (!unlinking && !(body->valid & OBD_MD_FLSIZE))
 206                 GOTO(out, rc = EAGAIN);
 207 #endif
 208 #ifdef IFILTERDATA_ACTUALLY_USED
 209         mds_free_filterdata(inode);
 210 #endif
 211  out:
 212         up(&mds->mds_epoch_sem);
 213         return rc;
 214 }
 215
 216 static int mds_deny_write_access(struct mds_obd *mds, struct inode *inode)
 217 {
 218         ENTRY;
 219         down(&mds->mds_epoch_sem);
 220         if (atomic_read(&inode->i_writecount) > 0) {
 221                 up(&mds->mds_epoch_sem);
 222                 RETURN(-ETXTBSY);
 223         }
 224         atomic_dec(&inode->i_writecount);
 225         up(&mds->mds_epoch_sem);
 226         RETURN(0);
 227 }
 228
 229 static void mds_allow_write_access(struct inode *inode)
 230 {
 231         ENTRY;
 232         atomic_inc(&inode->i_writecount);
 233 }
 234
 235 int mds_query_write_access(struct inode *inode)
 236 {
 237         ENTRY;
 238         RETURN(atomic_read(&inode->i_writecount));
 239 }
 240
 241 /* This replaces the VFS dentry_open, it manages mfd and writecount */
 242 static struct mds_file_data *mds_dentry_open(struct dentry *dentry,
 243                                              struct vfsmount *mnt, int flags,
 244                                              struct ptlrpc_request *req)
 245 {
 246         struct mds_export_data *med = &req->rq_export->exp_mds_data;
 247         struct mds_obd *mds = mds_req2mds(req);
 248         struct mds_file_data *mfd;
 249         struct mds_body *body;
 250         int rc = 0;
 251         ENTRY;
 252
 253         mfd = mds_mfd_new();
 254         if (mfd == NULL) {
 255                 CERROR("mds: out of memory\n");
 256                 GOTO(cleanup_dentry, rc = -ENOMEM);
 257         }
 258
 259         body = lustre_msg_buf(req->rq_repmsg, 1, sizeof (*body));
 260
 261         if (flags & FMODE_WRITE) {
 262                 /* FIXME: in recovery, need to pass old epoch here */
 263                 rc = mds_get_write_access(mds, dentry->d_inode, 0);
 264                 if (rc)
 265                         GOTO(cleanup_mfd, rc);
 266 #ifdef IFILTERDATA_ACTUALLY_USED
 267                 body->io_epoch = MDS_FILTERDATA(dentry->d_inode)->io_epoch;
 268 #endif
 269         } else if (flags & FMODE_EXEC) {
 270                 rc = mds_deny_write_access(mds, dentry->d_inode);
 271                 if (rc)
 272                         GOTO(cleanup_mfd, rc);
 273         }
 274
 275         dget(dentry);
 276
 277         /* mark the file as open to handle open-unlink. */
 278         DOWN_WRITE_I_ALLOC_SEM(dentry->d_inode);
 279         mds_orphan_open_inc(dentry->d_inode);
 280         UP_WRITE_I_ALLOC_SEM(dentry->d_inode);
 281
 282         mfd->mfd_mode = flags;
 283         mfd->mfd_dentry = dentry;
 284         mfd->mfd_xid = req->rq_xid;
 285
 286         spin_lock(&med->med_open_lock);
 287         list_add(&mfd->mfd_list, &med->med_open_head);
 288         spin_unlock(&med->med_open_lock);
 289         mds_mfd_put(mfd);
 290
 291         body->handle.cookie = mfd->mfd_handle.h_cookie;
 292         RETURN(mfd);
 293 cleanup_mfd:
 294         mds_mfd_put(mfd);
 295         mds_mfd_destroy(mfd);
 296 cleanup_dentry:
 297         return ERR_PTR(rc);
 298 }
 299
 300 static inline void
 301 mds_objids_from_lmm(obd_id *ids, struct lov_mds_md *lmm,
 302                     struct lov_desc *desc)
 303 {
 304         int i;
 305
 306         for (i = 0; i < le32_to_cpu(lmm->lmm_stripe_count); i++) {
 307                 ids[le32_to_cpu(lmm->lmm_objects[i].l_ost_idx)] =
 308                         le64_to_cpu(lmm->lmm_objects[i].l_object_id);
 309         }
 310 }
 311
 312 /* must be called with i_sem held */
 313 int
 314 mds_create_objects(struct obd_device *obd, struct ptlrpc_request *req,
 315                    int offset, struct mds_update_record *rec,
 316                    struct dentry *dchild, void **handle,
 317                    obd_id **ids)
 318 {
 319         struct inode *inode = dchild->d_inode;
 320         struct mds_obd *mds = &obd->u.mds;
 321         struct obd_trans_info oti = { 0 };
 322         struct lov_stripe_md *lsm = NULL;
 323         struct lov_mds_md *lmm = NULL;
 324         int rc, lmm_bufsize, lmm_size;
 325         struct obdo *oa = NULL;
 326         struct mds_body *body;
 327         void *lmm_buf;
 328         ENTRY;
 329
 330         if (rec->ur_flags & MDS_OPEN_DELAY_CREATE ||
 331             !(rec->ur_flags & FMODE_WRITE))
 332                 RETURN(0);
 333
 334         body = lustre_msg_buf(req->rq_repmsg, 1, sizeof(*body));
 335
 336         if (!S_ISREG(inode->i_mode))
 337                 RETURN(0);
 338         if (body->valid & OBD_MD_FLEASIZE)
 339                 RETURN(0);
 340
 341         OBD_ALLOC(*ids, mds->mds_dt_desc.ld_tgt_count * sizeof(**ids));
 342         if (*ids == NULL)
 343                 RETURN(-ENOMEM);
 344         oti.oti_objid = *ids;
 345
 346         /* replay case */
 347         if (lustre_msg_get_flags(req->rq_reqmsg) & MSG_REPLAY) {
 348                 LASSERT(id_ino(rec->ur_id2));
 349                 body->valid |= OBD_MD_FLBLKSZ | OBD_MD_FLEASIZE;
 350                 lmm_size = rec->ur_eadatalen;
 351                 lmm = rec->ur_eadata;
 352                 LASSERT(lmm);
 353
 354                 if (*handle == NULL)
 355                         *handle = fsfilt_start(obd, inode, FSFILT_OP_CREATE, NULL);
 356                 if (IS_ERR(*handle)) {
 357                         rc = PTR_ERR(*handle);
 358                         *handle = NULL;
 359                         RETURN(rc);
 360                 }
 361
 362                 mds_objids_from_lmm(*ids, lmm, &mds->mds_dt_desc);
 363
 364                 lmm_buf = lustre_msg_buf(req->rq_repmsg, offset, 0);
 365                 lmm_bufsize = req->rq_repmsg->buflens[offset];
 366                 LASSERT(lmm_buf != NULL);
 367                 LASSERT(lmm_bufsize >= lmm_size);
 368
 369                 memcpy(lmm_buf, lmm, lmm_size);
 370                 rc = fsfilt_set_md(obd, inode, *handle, lmm,
 371                                    lmm_size, EA_LOV);
 372                 if (rc)
 373                         CERROR("open replay failed to set md:%d\n", rc);
 374                 RETURN(0);
 375         }
 376
 377         if (OBD_FAIL_CHECK_ONCE(OBD_FAIL_MDS_ALLOC_OBDO))
 378                 RETURN(-ENOMEM);
 379
 380         oa = obdo_alloc();
 381         if (oa == NULL)
 382                 RETURN(-ENOMEM);
 383         oa->o_mode = S_IFREG | 0600;
 384         oa->o_id = inode->i_ino;
 385         oa->o_gr = FILTER_GROUP_FIRST_MDS + mds->mds_num;
 386         oa->o_generation = inode->i_generation;
 387         oa->o_uid = 0; /* must have 0 uid / gid on OST */
 388         oa->o_gid = 0;
 389         oa->o_valid = OBD_MD_FLID | OBD_MD_FLTYPE | OBD_MD_FLMODE |
 390                         OBD_MD_FLUID | OBD_MD_FLGID | OBD_MD_FLGROUP;
 391         oa->o_size = 0;
 392
 393         obdo_from_inode(oa, inode, OBD_MD_FLTYPE | OBD_MD_FLATIME |
 394                         OBD_MD_FLMTIME | OBD_MD_FLCTIME);
 395
 396         if (!(rec->ur_flags & MDS_OPEN_HAS_OBJS)) {
 397                 /* check if things like lfs setstripe are sending us the ea */
 398                 if (rec->ur_flags & MDS_OPEN_HAS_EA) {
 399                         rc = obd_iocontrol(OBD_IOC_LOV_SETSTRIPE,
 400                                            mds->mds_dt_exp,
 401                                            0, &lsm, rec->ur_eadata);
 402                         if (rc)
 403                                 GOTO(out_oa, rc);
 404                 } else {
 405                         OBD_ALLOC(lmm, mds->mds_max_mdsize);
 406                         if (lmm == NULL)
 407                                 GOTO(out_oa, rc = -ENOMEM);
 408
 409                         lmm_size = mds->mds_max_mdsize;
 410                         rc = mds_get_md(obd, dchild->d_parent->d_inode,
 411                                         lmm, &lmm_size, 1, 0);
 412                         if (rc > 0)
 413                                 rc = obd_iocontrol(OBD_IOC_LOV_SETSTRIPE,
 414                                                    mds->mds_dt_exp,
 415                                                    0, &lsm, lmm);
 416                         OBD_FREE(lmm, mds->mds_max_mdsize);
 417                         if (rc)
 418                                 GOTO(out_oa, rc);
 419                 }
 420
 421                 LASSERT(oa->o_gr >= FILTER_GROUP_FIRST_MDS);
 422                 oti.oti_flags |= OBD_MODE_CROW;
 423                 rc = obd_create(mds->mds_dt_exp, oa, NULL, 0, &lsm, &oti);
 424
 425                 if (rc) {
 426                         CDEBUG((rc == -ENOSPC ? D_INODE : D_ERROR),
 427                                "error creating objects for "
 428                                "inode %lu: rc = %d\n",
 429                                inode->i_ino, rc);
 430                         if (rc > 0) {
 431                                 CERROR("obd_create returned invalid "
 432                                        "rc %d\n", rc);
 433                                 rc = -EIO;
 434                         }
 435                         GOTO(out_oa, rc);
 436                 }
 437         } else {
 438                 rc = obd_iocontrol(OBD_IOC_LOV_SETEA, mds->mds_dt_exp,
 439                                    0, &lsm, rec->ur_eadata);
 440                 if (rc)
 441                         GOTO(out_oa, rc);
 442
 443                 lsm->lsm_object_id = oa->o_id;
 444                 lsm->lsm_object_gr = oa->o_gr;
 445         }
 446         if (inode->i_size) {
 447                 oa->o_size = inode->i_size;
 448                 obdo_from_inode(oa, inode, OBD_MD_FLTYPE | OBD_MD_FLATIME |
 449                                 OBD_MD_FLMTIME | OBD_MD_FLCTIME | OBD_MD_FLSIZE);
 450
 451                 rc = obd_setattr(mds->mds_dt_exp, oa, lsm, &oti);
 452                 if (rc) {
 453                         CERROR("error setting attrs for inode %lu: rc %d\n",
 454                                inode->i_ino, rc);
 455                         if (rc > 0) {
 456                                 CERROR("obd_setattr returned bad rc %d\n", rc);
 457                                 rc = -EIO;
 458                         }
 459                         GOTO(out_oa, rc);
 460                 }
 461         }
 462
 463         body->valid |= OBD_MD_FLBLKSZ | OBD_MD_FLEASIZE;
 464         obdo_refresh_inode(inode, oa, OBD_MD_FLBLKSZ);
 465
 466         LASSERT(lsm && lsm->lsm_object_id);
 467         lmm = NULL;
 468         rc = obd_packmd(mds->mds_dt_exp, &lmm, lsm);
 469         if (!id_ino(rec->ur_id2))
 470                 obd_free_memmd(mds->mds_dt_exp, &lsm);
 471         if (rc < 0) {
 472                 CERROR("cannot pack lsm, err = %d\n", rc);
 473                 GOTO(out_oa, rc);
 474         }
 475
 476         lmm_size = rc;
 477         body->eadatasize = rc;
 478
 479         if (*handle == NULL)
 480                 *handle = fsfilt_start(obd, inode, FSFILT_OP_CREATE, NULL);
 481         if (IS_ERR(*handle)) {
 482                 rc = PTR_ERR(*handle);
 483                 *handle = NULL;
 484                 GOTO(out_oa, rc);
 485         }
 486
 487         rc = fsfilt_set_md(obd, inode, *handle, lmm,
 488                            lmm_size, EA_LOV);
 489
 490         lmm_buf = lustre_msg_buf(req->rq_repmsg, offset, 0);
 491         lmm_bufsize = req->rq_repmsg->buflens[offset];
 492         LASSERT(lmm_buf);
 493         LASSERT(lmm_bufsize >= lmm_size);
 494
 495         memcpy(lmm_buf, lmm, lmm_size);
 496         obd_free_diskmd(mds->mds_dt_exp, &lmm);
 497 out_oa:
 498         oti_free_cookies(&oti);
 499         obdo_free(oa);
 500
 501         if (lsm)
 502                 obd_free_memmd(mds->mds_dt_exp, &lsm);
 503         RETURN(rc);
 504 }
 505
 506 int
 507 mds_destroy_object(struct obd_device *obd,
 508                    struct inode *inode, int async)
 509 {
 510         struct mds_obd *mds = &obd->u.mds;
 511         struct lov_mds_md *lmm = NULL;
 512         int rc, lmm_size;
 513         ENTRY;
 514
 515         LASSERT(inode != NULL);
 516
 517         if (inode->i_nlink != 0) {
 518                 CDEBUG(D_INODE, "attempt to destroy OSS object when "
 519                        "i_nlink == %d\n", (int)inode->i_nlink);
 520                 RETURN(0);
 521         }
 522
 523         OBD_ALLOC(lmm, mds->mds_max_mdsize);
 524         if (lmm == NULL)
 525                 RETURN(-ENOMEM);
 526
 527         lmm_size = mds->mds_max_mdsize;
 528         rc = mds_get_md(obd, inode, lmm, &lmm_size, 1, 0);
 529         if (rc < 0) {
 530                 CERROR("no stripe info for %lu/%lu inode\n",
 531                        (unsigned long)inode->i_ino,
 532                        (unsigned long)inode->i_generation);
 533                 GOTO(out_free_lmm, rc);
 534         }
 535
 536         if (rc > 0) {
 537                 /* asynchronously unlink objecect on OSS */
 538                 rc = mds_unlink_object(mds, inode, lmm, lmm_size,
 539                                        NULL, 0, async);
 540                 if (rc) {
 541                         CERROR("error unlinking object on OSS, "
 542                                "err %d\n", rc);
 543                         GOTO(out_free_lmm, rc);
 544                 }
 545         } else {
 546                 CDEBUG(D_INODE, "no stripping info found for inode "
 547                       "%lu/%lu\n", (unsigned long)inode->i_ino,
 548                       (unsigned long)inode->i_generation);
 549         }
 550         EXIT;
 551 out_free_lmm:
 552         OBD_FREE(lmm, mds->mds_max_mdsize);
 553         return rc;
 554 }
 555
 556 static void reconstruct_open(struct mds_update_record *rec, int offset,
 557                              struct ptlrpc_request *req,
 558                              struct lustre_handle *child_lockh)
 559 {
 560         struct mds_export_data *med = &req->rq_export->exp_mds_data;
 561         struct mds_client_data *mcd = med->med_mcd;
 562         struct mds_obd *mds = mds_req2mds(req);
 563         struct mds_file_data *mfd;
 564         struct obd_device *obd = req->rq_export->exp_obd;
 565         struct dentry *parent = NULL, *dchild;
 566         struct ldlm_reply *rep;
 567         struct mds_body *body;
 568         struct list_head *t;
 569         int put_child = 1;
 570         int rc;
 571         ENTRY;
 572
 573         LASSERT(offset == 3); /* only called via intent */
 574         rep = lustre_msg_buf(req->rq_repmsg, 0, sizeof (*rep));
 575         body = lustre_msg_buf(req->rq_repmsg, 1, sizeof (*body));
 576
 577         /* copy rc, transno and disp; steal locks */
 578         mds_req_from_mcd(req, mcd);
 579         intent_set_disposition(rep, mcd->mcd_last_data);
 580
 581         /* Only replay if create or open actually happened. */
 582         if (!intent_disposition(rep, DISP_OPEN_CREATE | DISP_OPEN_OPEN) ) {
 583                 EXIT;
 584                 return; /* error looking up parent or child */
 585         }
 586
 587         if (rec->ur_namelen == 1) {
 588                 CDEBUG(D_HA, "OPEN by fid "DLID4" (RESENT)\n",
 589                        OLID4(rec->ur_id1));
 590                 dchild = mds_id2dentry(obd, rec->ur_id1, NULL);
 591         } else {
 592                 parent = mds_id2dentry(obd, rec->ur_id1, NULL);
 593                 LASSERTF(!IS_ERR(parent), "lid "DLID4" rc %ld\n",
 594                                 OLID4(rec->ur_id1), PTR_ERR(parent));
 595                 dchild = ll_lookup_one_len(rec->ur_name, parent,
 596                                 rec->ur_namelen - 1);
 597                 LASSERTF(!IS_ERR(dchild), "parent "DLID4" child %s rc %ld\n",
 598                                 OLID4(rec->ur_id1), rec->ur_name, PTR_ERR(dchild));
 599         }
 600
 601         if (!dchild->d_inode)
 602                 GOTO(out_dput, 0); /* child not present to open */
 603
 604         /* At this point, we know we have a child. We'll send
 605          * it back _unless_ it not created and open failed.  */
 606         if (intent_disposition(rep, DISP_OPEN_OPEN) &&
 607             !intent_disposition(rep, DISP_OPEN_CREATE) &&
 608             req->rq_status)
 609                 GOTO(out_dput, 0);
 610
 611         /* get lock (write for O_CREAT, read otherwise) */
 612         mds_pack_inode2body(obd, body, dchild->d_inode, 1);
 613         if (S_ISREG(dchild->d_inode->i_mode)) {
 614                 rc = mds_pack_md(obd, req->rq_repmsg, 2, body,
 615                                  dchild->d_inode, 1, 0);
 616
 617                 if (rc)
 618                         LASSERT(rc == req->rq_status);
 619
 620                 /* If we have LOV EA data, the OST holds size, mtime */
 621                 if (!(body->valid & OBD_MD_FLEASIZE))
 622                         body->valid |= (OBD_MD_FLSIZE | OBD_MD_FLBLOCKS |
 623                                         OBD_MD_FLATIME | OBD_MD_FLMTIME);
 624         }
 625
 626         /* If we have -EEXIST as the status, and we were asked to create
 627          * exclusively, we can tell we failed because the file already existed.
 628          */
 629         if (req->rq_status == -EEXIST &&
 630             ((rec->ur_flags & (MDS_OPEN_CREAT | MDS_OPEN_EXCL)) ==
 631              (MDS_OPEN_CREAT | MDS_OPEN_EXCL))) {
 632                 GOTO(out_dput, 0);
 633         }
 634
 635         /* If we didn't get as far as trying to open, then some locking thing
 636          * probably went wrong, and we'll just bail here.
 637          */
 638         if (!intent_disposition(rep, DISP_OPEN_OPEN))
 639                 GOTO(out_dput, 0);
 640
 641         /* If we failed, then we must have failed opening, so don't look for
 642          * file descriptor or anything, just give the client the bad news.
 643          */
 644         if (req->rq_status)
 645                 GOTO(out_dput, 0);
 646
 647         mfd = NULL;
 648         list_for_each(t, &med->med_open_head) {
 649                 mfd = list_entry(t, struct mds_file_data, mfd_list);
 650                 if (mfd->mfd_xid == req->rq_xid)
 651                         break;
 652                 mfd = NULL;
 653         }
 654
 655         /* #warning "XXX fixme" bug 2991 */
 656         /* Here it used to LASSERT(mfd) if exp_outstanding_reply != NULL.
 657          * Now that exp_outstanding_reply is a list, it's just using mfd != NULL
 658          * to detect a re-open */
 659         if (mfd == NULL) {
 660                 mntget(mds->mds_vfsmnt);
 661                 CERROR("Re-opened file \n");
 662                 mfd = mds_dentry_open(dchild, mds->mds_vfsmnt,
 663                                       rec->ur_flags & ~MDS_OPEN_TRUNC, req);
 664                 if (!mfd) {
 665                         CERROR("mds: out of memory\n");
 666                         GOTO(out_dput, req->rq_status = -ENOMEM);
 667                 }
 668                 put_child = 0;
 669         } else {
 670                 body->handle.cookie = mfd->mfd_handle.h_cookie;
 671                 CDEBUG(D_INODE, "resend mfd %p, cookie "LPX64"\n", mfd,
 672                        mfd->mfd_handle.h_cookie);
 673         }
 674
 675  out_dput:
 676         if (put_child)
 677                 l_dput(dchild);
 678         if (parent)
 679                 l_dput(parent);
 680         EXIT;
 681 }
 682
 683 /* do NOT or the MAY_*'s, you'll get the weakest */
 684 static int accmode(int flags)
 685 {
 686         int res = 0;
 687
 688         if (flags & FMODE_READ)
 689                 res = MAY_READ;
 690         if (flags & (FMODE_WRITE|MDS_OPEN_TRUNC))
 691                 res |= MAY_WRITE;
 692         if (flags & FMODE_EXEC)
 693                 res = MAY_EXEC;
 694         return res;
 695 }
 696
 697 /* Handles object creation, actual opening, and I/O epoch */
 698 static int mds_finish_open(struct ptlrpc_request *req, struct dentry *dchild,
 699                            struct mds_body *body, int flags, void **handle,
 700                            struct mds_update_record *rec, struct ldlm_reply *rep)
 701 {
 702         struct obd_device *obd = req->rq_export->exp_obd;
 703         struct mds_obd *mds = mds_req2mds(req);
 704         struct mds_file_data *mfd = NULL;
 705         obd_id *ids = NULL;
 706         unsigned mode;
 707         int rc = 0;
 708         ENTRY;
 709
 710         /* atomically create objects if necessary */
 711         down(&dchild->d_inode->i_sem);
 712         mode = dchild->d_inode->i_mode;
 713
 714         if ((S_ISREG(mode) && !(body->valid & OBD_MD_FLEASIZE)) ||
 715             (S_ISDIR(mode) && !(body->valid & OBD_MD_FLDIREA))) {
 716                 rc = mds_pack_md(obd, req->rq_repmsg, 2, body,
 717                                  dchild->d_inode, 0, 0);
 718                 if (rc) {
 719                         up(&dchild->d_inode->i_sem);
 720                         RETURN(rc);
 721                 }
 722         }
 723
 724         if (rec != NULL) {
 725                 if ((body->valid & OBD_MD_FLEASIZE) &&
 726                     (rec->ur_flags & MDS_OPEN_HAS_EA)) {
 727                         up(&dchild->d_inode->i_sem);
 728                         RETURN(-EEXIST);
 729                 }
 730
 731                 if (!(body->valid & OBD_MD_FLEASIZE)) {
 732                         /* no EA: create objects */
 733                         rc = mds_create_objects(obd, req, 2, rec,
 734                                                 dchild, handle, &ids);
 735                         if (rc) {
 736                                 CERROR("mds_create_object: rc = %d\n", rc);
 737                                 up(&dchild->d_inode->i_sem);
 738                                 RETURN(rc);
 739                         }
 740                 }
 741
 742                 if (S_ISREG(dchild->d_inode->i_mode) &&
 743                     (body->valid & OBD_MD_FLEASIZE)) {
 744                         rc = mds_revalidate_lov_ea(obd, dchild->d_inode,
 745                                                    req->rq_repmsg, 2);
 746                         if (!rc)
 747                                 rc = mds_pack_md(obd, req->rq_repmsg, 2, body,
 748                                                  dchild->d_inode, 0, 0);
 749                         if (rc) {
 750                                 up(&dchild->d_inode->i_sem);
 751                                 RETURN(rc);
 752                         }
 753                 }
 754         }
 755
 756         rc = mds_pack_acl(obd, req->rq_repmsg, 3, body, dchild->d_inode);
 757         if (rc < 0) {
 758                 CERROR("mds_pack_acl: rc = %d\n", rc);
 759                 up(&dchild->d_inode->i_sem);
 760                 RETURN(rc);
 761         }
 762
 763         /* If the inode has no EA data, then MDSs hold size, mtime */
 764         if (S_ISREG(dchild->d_inode->i_mode) &&
 765             !(body->valid & OBD_MD_FLEASIZE)) {
 766                 body->valid |= (OBD_MD_FLSIZE | OBD_MD_FLBLOCKS |
 767                                 OBD_MD_FLATIME | OBD_MD_FLMTIME);
 768         }
 769
 770         up(&dchild->d_inode->i_sem);
 771
 772         intent_set_disposition(rep, DISP_OPEN_OPEN);
 773         mfd = mds_dentry_open(dchild, mds->mds_vfsmnt, flags, req);
 774         if (IS_ERR(mfd))
 775                 RETURN(PTR_ERR(mfd));
 776
 777         CDEBUG(D_INODE, "mfd %p, cookie "LPX64"\n", mfd,
 778                mfd->mfd_handle.h_cookie);
 779
 780         if (ids != NULL) {
 781                 mds_dt_update_objids(obd, ids);
 782                 OBD_FREE(ids, sizeof(*ids) * mds->mds_dt_desc.ld_tgt_count);
 783         }
 784
 785         RETURN(rc);
 786 }
 787
 788 static int mds_open_by_id(struct ptlrpc_request *req,
 789                           struct lustre_id *id,
 790                           struct mds_body *body, int flags,
 791                           struct mds_update_record *rec,
 792                           struct ldlm_reply *rep)
 793 {
 794         struct mds_obd *mds = mds_req2mds(req);
 795         struct inode *pending_dir = mds->mds_pending_dir->d_inode;
 796         struct dentry *dchild;
 797         char idname[LL_ID_NAMELEN];
 798         int idlen = 0, rc;
 799         void *handle = NULL;
 800         ENTRY;
 801
 802         down(&pending_dir->i_sem);
 803         idlen = ll_id2str(idname, id_ino(id), id_gen(id));
 804         dchild = lookup_one_len(idname, mds->mds_pending_dir,
 805                                 idlen);
 806         if (IS_ERR(dchild)) {
 807                 up(&pending_dir->i_sem);
 808                 rc = PTR_ERR(dchild);
 809                 CERROR("error looking up %s in PENDING: rc = %d\n",
 810                        idname, rc);
 811                 RETURN(rc);
 812         }
 813
 814         up(&pending_dir->i_sem);
 815         if (dchild->d_inode != NULL) {
 816                 mds_inode_set_orphan(dchild->d_inode);
 817                 mds_pack_inode2body(req2obd(req), body,
 818                                     dchild->d_inode, 1);
 819
 820                 intent_set_disposition(rep, DISP_LOOKUP_EXECD);
 821                 intent_set_disposition(rep, DISP_LOOKUP_POS);
 822                 CWARN("Orphan %s found and opened in PENDING directory\n",
 823                        idname);
 824                 goto open;
 825         }
 826         l_dput(dchild);
 827
 828         /*
 829          * we didn't find it in PENDING so it isn't an orphan.  See if it was a
 830          * regular inode that was previously created.
 831          */
 832         dchild = mds_id2dentry(req2obd(req), id, NULL);
 833         if (IS_ERR(dchild))
 834                 RETURN(PTR_ERR(dchild));
 835
 836         mds_pack_inode2body(req2obd(req), body,
 837                             dchild->d_inode, 1);
 838
 839         intent_set_disposition(rep, DISP_LOOKUP_EXECD);
 840         intent_set_disposition(rep, DISP_LOOKUP_POS);
 841
 842  open:
 843         rc = mds_finish_open(req, dchild, body, flags, &handle, rec, rep);
 844         rc = mds_finish_transno(mds, dchild ? dchild->d_inode : NULL, handle,
 845                                 req, rc, rep ? rep->lock_policy_res1 : 0);
 846         /* XXX what do we do here if mds_finish_transno itself failed? */
 847         l_dput(dchild);
 848         RETURN(rc);
 849 }
 850
 851 int mds_pin(struct ptlrpc_request *req, int offset)
 852 {
 853         struct obd_device *obd = req->rq_export->exp_obd;
 854         struct mds_body *request_body, *reply_body;
 855         struct lvfs_run_ctxt saved;
 856         int rc, size = sizeof(*reply_body);
 857         ENTRY;
 858
 859         request_body = lustre_msg_buf(req->rq_reqmsg, offset,
 860                                       sizeof(*request_body));
 861
 862         rc = lustre_pack_reply(req, 1, &size, NULL);
 863         if (rc)
 864                 RETURN(rc);
 865         reply_body = lustre_msg_buf(req->rq_repmsg, 0, sizeof(*reply_body));
 866
 867         push_ctxt(&saved, &obd->obd_lvfs_ctxt, NULL);
 868         rc = mds_open_by_id(req, &request_body->id1, reply_body,
 869                             request_body->flags, NULL, NULL);
 870         pop_ctxt(&saved, &obd->obd_lvfs_ctxt, NULL);
 871
 872         RETURN(rc);
 873 }
 874
 875 /*
 876  * get a lock on the ino to sync with creation WRT inode reuse (bug 2029). If
 877  * child_lockh is NULL we just get the lock as a barrier to wait for other
 878  * holders of this lock, and drop it right away again.
 879  */
 880 int mds_lock_new_child(struct obd_device *obd, struct inode *inode,
 881                        struct lustre_handle *child_lockh)
 882 {
 883         struct ldlm_res_id child_res_id = { .name = { inode->i_ino, 0, 1, 0 } };
 884         struct lustre_handle lockh;
 885         int lock_flags = 0;
 886         int rc;
 887         ENTRY;
 888
 889         if (child_lockh == NULL)
 890                 child_lockh = &lockh;
 891
 892         rc = ldlm_cli_enqueue(NULL, NULL, obd->obd_namespace, child_res_id,
 893                               LDLM_PLAIN, NULL, LCK_EX, &lock_flags,
 894                               mds_blocking_ast, ldlm_completion_ast, NULL,
 895                               NULL, NULL, 0, NULL, child_lockh);
 896         if (rc != ELDLM_OK)
 897                 CERROR("ldlm_cli_enqueue: %d\n", rc);
 898         else if (child_lockh == &lockh)
 899                 ldlm_lock_decref(child_lockh, LCK_EX);
 900
 901         RETURN(rc);
 902 }
 903
 904 int mds_open(struct mds_update_record *rec, int offset,
 905              struct ptlrpc_request *req, struct lustre_handle *child_lockh)
 906 {
 907         /* XXX ALLOCATE _something_ - 464 bytes on stack here */
 908         struct obd_device *obd = req->rq_export->exp_obd;
 909         struct mds_export_data *med = &req->rq_export->u.eu_mds_data;
 910         struct mds_obd *mds = mds_req2mds(req);
 911         struct ldlm_reply *rep = NULL;
 912         struct mds_body *body = NULL;
 913         struct dentry *dchild = NULL, *dparent = NULL;
 914         struct lustre_handle parent_lockh[2] = {{0}, {0}};
 915         int rc = 0, cleanup_phase = 0, acc_mode, created = 0;
 916         int parent_mode = LCK_PR;
 917         void *handle = NULL;
 918         struct dentry_params dp;
 919         struct mea *mea = NULL;
 920         int mea_size, update_mode;
 921         int child_mode = LCK_PR;
 922         ENTRY;
 923
 924         DEBUG_REQ(D_INODE, req, "parent "DLID4" name %*s mode %o",
 925                   OLID4(rec->ur_id1), rec->ur_namelen - 1, rec->ur_name,
 926                   rec->ur_mode);
 927
 928         OBD_FAIL_TIMEOUT(OBD_FAIL_MDS_PAUSE_OPEN | OBD_FAIL_ONCE,
 929                          (obd_timeout + 1) / 4);
 930
 931         if (offset == 3) { /* intent */
 932                 rep = lustre_msg_buf(req->rq_repmsg, 0, sizeof (*rep));
 933                 body = lustre_msg_buf(req->rq_repmsg, 1, sizeof (*body));
 934         } else if (offset == 1) { /* non-intent reint */
 935                 body = lustre_msg_buf(req->rq_repmsg, 0, sizeof (*body));
 936         } else {
 937                 body = NULL;
 938                 LBUG();
 939         }
 940
 941         MDS_CHECK_RESENT(req, reconstruct_open(rec, offset, req, child_lockh));
 942
 943         /*
 944          * Step 0: If we are passed a id, then we assume the client already
 945          * opened this file and is only replaying the RPC, so we open the inode
 946          * by fid (at some large expense in security).
 947          */
 948         if (lustre_msg_get_flags(req->rq_reqmsg) & MSG_REPLAY) {
 949                 CDEBUG(D_HA, "open obj "DLID4" name %*s mode %o\n",
 950                        OLID4(rec->ur_id2), rec->ur_namelen - 1,
 951                        rec->ur_name, rec->ur_mode);
 952
 953                 LASSERT(id_ino(rec->ur_id2));
 954
 955                 rc = mds_open_by_id(req, rec->ur_id2, body,
 956                                     rec->ur_flags, rec, rep);
 957                 if (rc != -ENOENT) {
 958                         mds_body_do_reverse_map(med, body);
 959                         RETURN(rc);
 960                 }
 961
 962                 /* We didn't find the correct inode on disk either, so we
 963                  * need to re-create it via a regular replay. */
 964                 LASSERT(rec->ur_flags & MDS_OPEN_CREAT);
 965         } else {
 966                 LASSERT(!id_ino(rec->ur_id2));
 967         }
 968
 969         LASSERT(offset == 3); /* If we got here, we must be called via intent */
 970
 971         if (OBD_FAIL_CHECK(OBD_FAIL_MDS_OPEN_PACK)) {
 972                 CERROR("test case OBD_FAIL_MDS_OPEN_PACK\n");
 973                 RETURN(-ENOMEM);
 974         }
 975
 976         acc_mode = accmode(rec->ur_flags);
 977
 978         /* Step 1: Find and lock the parent */
 979         if (rec->ur_flags & MDS_OPEN_CREAT) {
 980                 /* XXX Well, in fact we only need this lock mode change if
 981                    in addition to O_CREAT, the file does not exist.
 982                    But we do not know if it exists or not yet */
 983                 parent_mode = LCK_PW;
 984         }
 985
 986         if (rec->ur_namelen == 1) {
 987                 /* client (LMV) wants to open the file by id */
 988                 CDEBUG(D_OTHER, "OPEN by id "DLID4"\n", OLID4(rec->ur_id1));
 989                 dchild = mds_id2dentry(obd, rec->ur_id1, NULL);
 990                 if (IS_ERR(dchild)) {
 991                         rc = PTR_ERR(dparent);
 992                         CERROR("child lookup by an id error %d\n", rc);
 993                         GOTO(cleanup, rc);
 994                 }
 995                 goto got_child;
 996         }
 997
 998 restart:
 999         dparent = mds_id2locked_dentry(obd, rec->ur_id1, NULL, parent_mode,
1000                                        parent_lockh, &update_mode, rec->ur_name,
1001                                        rec->ur_namelen - 1, MDS_INODELOCK_UPDATE);
1002         if (IS_ERR(dparent)) {
1003                 rc = PTR_ERR(dparent);
1004                 if (rc != -ENOENT) {
1005                         CERROR("parent lookup for "DLID4" failed, error %d\n",
1006                                OLID4(rec->ur_id1), rc);
1007                 } else {
1008                         /* Just cannot find parent - make it look like
1009                            usual negative lookup to avoid extra MDS RPC */
1010                         intent_set_disposition(rep, DISP_LOOKUP_EXECD);
1011                         intent_set_disposition(rep, DISP_LOOKUP_NEG);
1012                 }
1013                 GOTO(cleanup, rc);
1014         }
1015         LASSERT(dparent->d_inode != NULL);
1016
1017         cleanup_phase = 1; /* parent dentry and lock */
1018
1019         /* try to retrieve MEA data for this dir */
1020         rc = mds_md_get_attr(obd, dparent->d_inode, &mea, &mea_size);
1021         if (rc)
1022                 GOTO(cleanup, rc);
1023
1024         if (mea != NULL) {
1025                 /*
1026                  * dir is already splitted, check is requested filename should *
1027                  * live at this MDS or at another one.
1028                  */
1029                 int i;
1030                 i = mea_name2idx(mea, rec->ur_name, rec->ur_namelen - 1);
1031                 if (mea->mea_master != id_group(&mea->mea_ids[i])) {
1032                         CDEBUG(D_OTHER,
1033                                "%s: inapropriate MDS(%d) for %lu/%u:%s."
1034                                " should be %lu(%d)\n", obd->obd_name,
1035                                mea->mea_master, dparent->d_inode->i_ino,
1036                                dparent->d_inode->i_generation, rec->ur_name,
1037                                (unsigned long)id_group(&mea->mea_ids[i]), i);
1038                         GOTO(cleanup, rc = -ERESTART);
1039                 }
1040         }
1041
1042         /* Step 2: Lookup the child */
1043         dchild = ll_lookup_one_len(rec->ur_name, dparent, rec->ur_namelen - 1);
1044         if (IS_ERR(dchild)) {
1045                 rc = PTR_ERR(dchild);
1046                 dchild = NULL; /* don't confuse mds_finish_transno() below */
1047                 GOTO(cleanup, rc);
1048         }
1049
1050 got_child:
1051         cleanup_phase = 2; /* child dentry */
1052
1053         if (dchild->d_flags & DCACHE_CROSS_REF) {
1054                 CDEBUG(D_OTHER, "cross reference: "DLID4"\n", OLID4(rec->ur_id1));
1055                 LASSERT(rec->ur_namelen > 1);
1056
1057                 /* we're gonna acquire LOOKUP lock on the child,
1058                  * but we have already locked parent and our order
1059                  * may conflict with enqueue_order_locks(). so,
1060                  * drop parent lock and acquire both the locks in
1061                  * common order. bug 6190 */
1062 #ifdef S_PDIROPS
1063                 if (parent_lockh[1].cookie != 0)
1064                         ldlm_lock_decref(parent_lockh + 1, update_mode);
1065 #endif
1066                 ldlm_lock_decref(parent_lockh, parent_mode);
1067                 l_dput(dchild);
1068                 l_dput(dparent);
1069                 cleanup_phase = 0;
1070
1071                 rc = mds_get_parent_child_locked(obd, mds, rec->ur_id1,
1072                                                  parent_lockh, &dparent,
1073                                                  LCK_PR, MDS_INODELOCK_UPDATE,
1074                                                  &update_mode, rec->ur_name,
1075                                                  rec->ur_namelen, child_lockh,
1076                                                  &dchild, LCK_PR,
1077                                                  MDS_INODELOCK_LOOKUP);
1078
1079                 if (rc)
1080                         GOTO(cleanup, rc);
1081
1082 #ifdef S_PDIROPS
1083                 if (parent_lockh[1].cookie != 0)
1084                         ldlm_lock_decref(parent_lockh + 1, update_mode);
1085 #endif
1086                 ldlm_lock_decref(parent_lockh, LCK_PR);
1087
1088                 if (dchild->d_inode || !(dchild->d_flags & DCACHE_CROSS_REF)) {
1089                         CDEBUG(D_OTHER, "race: name changed (%p)\n",
1090                                dchild->d_inode);
1091                         if (dchild->d_inode)
1092                                 ldlm_lock_decref(child_lockh, LCK_PR);
1093                         l_dput(dchild);
1094                         l_dput(dparent);
1095                         GOTO(restart, rc);
1096                 }
1097
1098                 mds_pack_dentry2body(obd, body, dchild, 1);
1099                 intent_set_disposition(rep, DISP_LOOKUP_POS);
1100                 intent_set_disposition(rep, DISP_LOOKUP_EXECD);
1101
1102                 if (mea)
1103                         OBD_FREE(mea, mea_size);
1104                 l_dput(dchild);
1105                 l_dput(dparent);
1106                 RETURN(rc);
1107         }
1108
1109         intent_set_disposition(rep, DISP_LOOKUP_EXECD);
1110
1111         if (dchild->d_inode)
1112                 intent_set_disposition(rep, DISP_LOOKUP_POS);
1113         else
1114                 intent_set_disposition(rep, DISP_LOOKUP_NEG);
1115
1116         /* Step 3: If the child was negative, and we're supposed to, create it.*/
1117         if (dchild->d_inode == NULL) {
1118                 unsigned long ino;
1119                 struct iattr iattr;
1120                 struct inode *inode;
1121
1122                 ino = (unsigned long)id_ino(rec->ur_id2);
1123
1124                 rc = mds_try_to_split_dir(obd, dparent, &mea, 0,
1125                                           update_mode);
1126
1127                 CDEBUG(D_OTHER, "%s: splitted %lu/%u - %d\n",
1128                        obd->obd_name, dparent->d_inode->i_ino,
1129                        dparent->d_inode->i_generation, rc);
1130
1131                 if (rc > 0) {
1132                         /* dir got splitted */
1133                         GOTO(cleanup, rc = -ERESTART);
1134                 } else if (rc < 0) {
1135                         /* error happened during spitting */
1136                         GOTO(cleanup, rc);
1137                 }
1138
1139                 if (!(rec->ur_flags & MDS_OPEN_CREAT)) {
1140                         /*
1141                          * dentry is negative and we weren't supposed to create
1142                          * object, get out of here.
1143                          */
1144                         GOTO(cleanup, rc = -ENOENT);
1145                 }
1146
1147                 intent_set_disposition(rep, DISP_OPEN_CREATE);
1148                 handle = fsfilt_start(obd, dparent->d_inode, FSFILT_OP_CREATE,
1149                                       NULL);
1150                 if (IS_ERR(handle)) {
1151                         rc = PTR_ERR(handle);
1152                         handle = NULL;
1153                         GOTO(cleanup, rc);
1154                 }
1155                 dchild->d_fsdata = (void *) &dp;
1156                 dp.p_ptr = req;
1157                 dp.p_inum = ino;
1158
1159                 rc = ll_vfs_create(dparent->d_inode, dchild, rec->ur_mode, NULL);
1160                 if (dchild->d_fsdata == (void *)(unsigned long)ino)
1161                         dchild->d_fsdata = NULL;
1162
1163                 if (rc) {
1164                         CDEBUG(D_INODE, "error during create: %d\n", rc);
1165                         GOTO(cleanup, rc);
1166                 }
1167                 inode = dchild->d_inode;
1168                 if (ino) {
1169                         LASSERT(ino == inode->i_ino);
1170
1171                         /* written as part of setattr */
1172                         inode->i_generation = id_gen(rec->ur_id2);
1173                         CDEBUG(D_HA, "recreated ino %lu with gen %u\n",
1174                                inode->i_ino, inode->i_generation);
1175                 }
1176
1177                 created = 1;
1178                 LTIME_S(iattr.ia_atime) = rec->ur_time;
1179                 LTIME_S(iattr.ia_ctime) = rec->ur_time;
1180                 LTIME_S(iattr.ia_mtime) = rec->ur_time;
1181
1182                 iattr.ia_uid = rec->ur_fsuid;
1183                 if (dparent->d_inode->i_mode & S_ISGID)
1184                         iattr.ia_gid = dparent->d_inode->i_gid;
1185                 else
1186                         iattr.ia_gid = rec->ur_fsgid;
1187
1188                 iattr.ia_valid = ATTR_UID | ATTR_GID | ATTR_ATIME |
1189                         ATTR_MTIME | ATTR_CTIME;
1190
1191                 rc = fsfilt_setattr(obd, dchild, handle, &iattr, 0);
1192                 if (rc)
1193                         CERROR("error on child setattr: rc = %d\n", rc);
1194
1195                 iattr.ia_valid = ATTR_MTIME | ATTR_CTIME;
1196
1197                 rc = fsfilt_setattr(obd, dparent, handle, &iattr, 0);
1198                 if (rc)
1199                         CERROR("error on parent setattr: rc = %d\n", rc);
1200                 else {
1201                         MD_COUNTER_INCREMENT(obd, create);
1202                 }
1203
1204                 if (ino) {
1205                         rc = mds_update_inode_sid(obd, dchild->d_inode,
1206                                                   handle, rec->ur_id2);
1207                         if (rc) {
1208                                 CERROR("mds_update_inode_sid() failed, "
1209                                        "rc = %d\n", rc);
1210                         }
1211                         id_assign_fid(&body->id1, rec->ur_id2);
1212
1213                         /*
1214                          * make sure, that fid is up-to-date.
1215                          */
1216                         mds_set_last_fid(obd, id_fid(rec->ur_id2));
1217                 } else {
1218                         rc = mds_alloc_inode_sid(obd, dchild->d_inode,
1219                                                  handle, &body->id1);
1220                         if (rc) {
1221                                 CERROR("mds_alloc_inode_sid() failed, "
1222                                        "rc = %d\n", rc);
1223                         }
1224                 }
1225
1226                 if (!(rec->ur_flags & O_EXCL)) { /* bug 3313 */
1227                         rc = fsfilt_commit(obd, dchild->d_inode->i_sb,
1228                                            dchild->d_inode, handle,
1229                                            req->rq_export->exp_sync);
1230                         handle = NULL;
1231                 }
1232
1233                 acc_mode = 0;           /* Don't check for permissions */
1234         }
1235         mds_pack_inode2body(obd, body, dchild->d_inode, 1);
1236
1237         LASSERTF(!mds_inode_is_orphan(dchild->d_inode),
1238                  "dchild %.*s (%p) inode %p\n", dchild->d_name.len,
1239                  dchild->d_name.name, dchild, dchild->d_inode);
1240
1241         if (S_ISREG(dchild->d_inode->i_mode)) {
1242                 /* Check permissions etc */
1243                 rc = ll_permission(dchild->d_inode, acc_mode, NULL);
1244                 if (rc != 0)
1245                         GOTO(cleanup, rc);
1246
1247                 /* Can't write to a read-only file */
1248                 if (IS_RDONLY(dchild->d_inode) && (acc_mode & MAY_WRITE) != 0)
1249                         GOTO(cleanup, rc = -EPERM);
1250
1251                 /* An append-only file must be opened in append mode for
1252                  * writing */
1253                 if (IS_APPEND(dchild->d_inode) && (acc_mode & MAY_WRITE) != 0 &&
1254                     ((rec->ur_flags & MDS_OPEN_APPEND) == 0 ||
1255                      (rec->ur_flags & MDS_OPEN_TRUNC) != 0))
1256                         GOTO(cleanup, rc = -EPERM);
1257         }
1258
1259         if (!created && (rec->ur_flags & MDS_OPEN_CREAT) &&
1260             (rec->ur_flags & MDS_OPEN_EXCL)) {
1261                 /* File already exists, we didn't just create it, and we
1262                  * were passed O_EXCL; err-or. */
1263                 GOTO(cleanup, rc = -EEXIST); // returns a lock to the client
1264         }
1265
1266         if (S_ISDIR(dchild->d_inode->i_mode)) {
1267                 if (rec->ur_flags & MDS_OPEN_CREAT ||
1268                     rec->ur_flags & FMODE_WRITE) {
1269                         /* we are trying to create or write a exist dir */
1270                         GOTO(cleanup, rc = -EISDIR);
1271                 }
1272                 if (ll_permission(dchild->d_inode, acc_mode, NULL))
1273                         GOTO(cleanup, rc = -EACCES);
1274
1275                 /*
1276                  * here was checking for possible GNS mount points to skip their
1277                  * open. I removed it as its detection based only on SUID bit is
1278                  * not reliable. Opening such a dirs should not cause any
1279                  * problems, at least tests show that. --umka
1280                  */
1281         }
1282
1283         /* if we are following a symlink, don't open */
1284         if (S_ISLNK(dchild->d_inode->i_mode))
1285                 GOTO(cleanup_no_trans, rc = 0);
1286
1287         if ((rec->ur_flags & MDS_OPEN_DIRECTORY) &&
1288             !S_ISDIR(dchild->d_inode->i_mode))
1289                 GOTO(cleanup, rc = -ENOTDIR);
1290
1291         if (OBD_FAIL_CHECK(OBD_FAIL_MDS_OPEN_CREATE)) {
1292                 obd_fail_loc = OBD_FAIL_LDLM_REPLY | OBD_FAIL_ONCE;
1293                 GOTO(cleanup, rc = -EAGAIN);
1294         }
1295
1296 #if 0
1297         /* We cannot use acc_mode here, because it is zeroed in case of
1298            creating a file, so we get wrong lockmode */
1299         if (accmode(rec->ur_flags) & MAY_WRITE)
1300                 child_mode = LCK_CW;
1301         else if (accmode(rec->ur_flags) & MAY_EXEC)
1302                 child_mode = LCK_PR;
1303         else
1304                 child_mode = LCK_CR;
1305
1306         /* Always returning LOOKUP lock if open succesful to guard
1307          * dentry on client. In case of replay we do not get a lock
1308          * assuming that the caller has it already */
1309         if (!(lustre_msg_get_flags(req->rq_reqmsg) & MSG_REPLAY)) {
1310                 struct ldlm_res_id child_res_id = { .name = {0}};
1311                 ldlm_policy_data_t policy;
1312                 int lock_flags = 0;
1313
1314                 /* LOOKUP lock will protect dentry on client -bzzz */
1315                 policy.l_inodebits.bits = MDS_INODELOCK_LOOKUP |
1316                                                 MDS_INODELOCK_OPEN;
1317
1318                 child_res_id.name[0] = id_fid(&body->id1);
1319                 child_res_id.name[1] = id_group(&body->id1);
1320
1321                 rc = ldlm_cli_enqueue(NULL, NULL, obd->obd_namespace,
1322                                       child_res_id, LDLM_IBITS, &policy,
1323                                       child_mode, &lock_flags,
1324                                       mds_blocking_ast, ldlm_completion_ast,
1325                                       NULL, NULL, NULL, 0, NULL, child_lockh);
1326                 if (rc != ELDLM_OK)
1327                         GOTO(cleanup, rc);
1328
1329                 cleanup_phase = 3;
1330         }
1331 #else
1332 /* re-enable test 24n in sanity.sh: it needs LOOKUP lock on open */
1333 #warning "disable opencache lock for CMD2"
1334 #endif
1335
1336         /* Step 5: mds_open it */
1337         rc = mds_finish_open(req, dchild, body, rec->ur_flags, &handle,
1338                              rec, rep);
1339
1340         EXIT;
1341 cleanup:
1342         rc = mds_finish_transno(mds, dchild ? dchild->d_inode : NULL, handle,
1343                                 req, rc, rep ? rep->lock_policy_res1 : 0);
1344
1345 cleanup_no_trans:
1346         switch (cleanup_phase) {
1347         case 3:
1348                 if (rc) {
1349                         ldlm_lock_decref(child_lockh, child_mode);
1350                         child_lockh->cookie = 0;
1351                 }
1352         case 2:
1353                 if (rc && created) {
1354                         int err = vfs_unlink(dparent->d_inode, dchild);
1355                         if (err) {
1356                                 CERROR("unlink(%.*s) in error path: %d\n",
1357                                        dchild->d_name.len, dchild->d_name.name,
1358                                        err);
1359                         }
1360                 } else if (created) {
1361                         mds_lock_new_child(obd, dchild->d_inode, NULL);
1362                 }
1363                 l_dput(dchild);
1364         case 1:
1365                 if (dparent == NULL)
1366                         break;
1367
1368                 l_dput(dparent);
1369 #ifdef S_PDIROPS
1370                 if (parent_lockh[1].cookie != 0)
1371                         ldlm_lock_decref(parent_lockh + 1, update_mode);
1372 #endif
1373                 if (rc)
1374                         ldlm_lock_decref(parent_lockh, parent_mode);
1375                 else
1376                         ptlrpc_save_lock (req, parent_lockh, parent_mode);
1377         }
1378         if (mea)
1379                 OBD_FREE(mea, mea_size);
1380         if (rc == 0)
1381                 atomic_inc(&mds->mds_open_count);
1382
1383         mds_body_do_reverse_map(med, body);
1384
1385         /*
1386          * If we have not taken the "open" lock, we may not return 0 here,
1387          * because caller expects 0 to mean "lock is taken", and it needs
1388          * nonzero return here for caller to return EDLM_LOCK_ABORTED to
1389          * client. Later caller should rewrite the return value back to zero
1390          * if it to be used any further.
1391          */
1392         if ((cleanup_phase != 3) && !rc)
1393                 rc = ENOLCK;
1394
1395         RETURN(rc);
1396 }
1397
1398 /* Close a "file descriptor" and possibly unlink an orphan from the
1399  * PENDING directory.  Caller must hold child->i_sem, this drops it.
1400  *
1401  * If we are being called from mds_disconnect() because the client has
1402  * disappeared, then req == NULL and we do not update last_rcvd because
1403  * there is nothing that could be recovered by the client at this stage
1404  * (it will not even _have_ an entry in last_rcvd anymore).
1405  *
1406  * Returns EAGAIN if the client needs to get more data and re-close. */
1407 int mds_mfd_close(struct ptlrpc_request *req, int offset,
1408                   struct obd_device *obd, struct mds_file_data *mfd,
1409                   int unlink_orphan)
1410 {
1411         struct inode *inode = mfd->mfd_dentry->d_inode;
1412         char idname[LL_ID_NAMELEN];
1413         int last_orphan, idlen, rc = 0, cleanup_phase = 0;
1414         struct dentry *pending_child = NULL;
1415         struct mds_obd *mds = &obd->u.mds;
1416         struct inode *pending_dir = mds->mds_pending_dir->d_inode;
1417         void *handle = NULL;
1418         struct mds_body *request_body = NULL, *reply_body = NULL;
1419         struct dentry_params dp;
1420         struct iattr iattr = { 0 };
1421         struct llog_create_locks *lcl = NULL;
1422         ENTRY;
1423
1424         if (req && req->rq_reqmsg != NULL)
1425                 request_body = lustre_msg_buf(req->rq_reqmsg, offset,
1426                                               sizeof(*request_body));
1427         if (req && req->rq_repmsg != NULL)
1428                 reply_body = lustre_msg_buf(req->rq_repmsg, 0,
1429                                             sizeof(*reply_body));
1430
1431         idlen = ll_id2str(idname, inode->i_ino, inode->i_generation);
1432         CDEBUG(D_INODE, "inode %p ino %s nlink %d orphan %d\n", inode,
1433                idname, inode->i_nlink, mds_orphan_open_count(inode));
1434
1435         last_orphan = mds_orphan_open_dec_test(inode) &&
1436                 mds_inode_is_orphan(inode);
1437         UP_WRITE_I_ALLOC_SEM(inode);
1438
1439         /* this is half of the actual "close" */
1440         if (mfd->mfd_mode & FMODE_WRITE) {
1441                 rc = mds_put_write_access(mds, inode, request_body,
1442                                           last_orphan && unlink_orphan);
1443         } else if (mfd->mfd_mode & FMODE_EXEC) {
1444                 mds_allow_write_access(inode);
1445         }
1446
1447         if (last_orphan && unlink_orphan) {
1448                 struct lov_mds_md *lmm = NULL;
1449                 int stripe_count = 0;
1450                 LASSERT(rc == 0); /* mds_put_write_access must have succeeded */
1451
1452                 CDEBUG(D_HA, "destroying orphan object %s\n", idname);
1453
1454                 if ((S_ISREG(inode->i_mode) && inode->i_nlink != 1) ||
1455                     (S_ISDIR(inode->i_mode) && inode->i_nlink != 2))
1456                         CERROR("found \"orphan\" %s %s with link count %d\n",
1457                                S_ISREG(inode->i_mode) ? "file" : "dir",
1458                                idname, inode->i_nlink);
1459                 /*
1460                  * sadly, there is no easy way to save pending_child from
1461                  * mds_reint_unlink() into mfd, so we need to re-lookup, but
1462                  * normally it will still be in the dcache.
1463                  */
1464                 down(&pending_dir->i_sem);
1465                 cleanup_phase = 1; /* up(i_sem) when finished */
1466                 pending_child = lookup_one_len(idname, mds->mds_pending_dir,
1467                                                idlen);
1468                 if (IS_ERR(pending_child))
1469                         GOTO(cleanup, rc = PTR_ERR(pending_child));
1470                 if (pending_child->d_inode == NULL) {
1471                         CERROR("orphan %s has been removed\n", idname);
1472                         GOTO(cleanup, rc = 0);
1473                 }
1474
1475                 cleanup_phase = 2; /* dput(pending_child) when finished */
1476                 if (S_ISDIR(pending_child->d_inode->i_mode)) {
1477                         rc = vfs_rmdir(pending_dir, pending_child);
1478                         if (rc)
1479                                 CERROR("error unlinking orphan dir %s: rc %d\n",
1480                                        idname, rc);
1481                         goto out;
1482                 }
1483
1484                 if (req != NULL && req->rq_repmsg != NULL) {
1485                         lmm = lustre_msg_buf(req->rq_repmsg, 1, 0);
1486                         stripe_count = le32_to_cpu(lmm->lmm_stripe_count);
1487                 }
1488
1489                 handle = fsfilt_start_log(obd, pending_dir, FSFILT_OP_UNLINK,
1490                                           NULL, stripe_count);
1491                 if (IS_ERR(handle)) {
1492                         rc = PTR_ERR(handle);
1493                         handle = NULL;
1494                         GOTO(cleanup, rc);
1495                 }
1496
1497                 pending_child->d_fsdata = (void *) &dp;
1498                 dp.p_inum = 0;
1499                 dp.p_ptr = req;
1500                 rc = vfs_unlink(pending_dir, pending_child);
1501                 if (rc)
1502                         CERROR("error unlinking orphan %s: rc %d\n",
1503                                idname, rc);
1504
1505                 if (req != NULL && req->rq_repmsg != NULL &&
1506                     (reply_body->valid & OBD_MD_FLEASIZE) &&
1507                     mds_log_op_unlink(obd, pending_child->d_inode,
1508                                       lmm, req->rq_repmsg->buflens[1],
1509                                       lustre_msg_buf(req->rq_repmsg, 2, 0),
1510                                       req->rq_repmsg->buflens[2], &lcl) > 0) {
1511                         reply_body->valid |= OBD_MD_FLCOOKIE;
1512                 }
1513
1514                 rc = mds_destroy_object(obd, inode, 1);
1515                 if (rc) {
1516                         CERROR("cannot destroy OSS object on close, err %d\n",
1517                                rc);
1518                         rc = 0;
1519                 }
1520
1521                 goto out; /* Don't bother updating attrs on unlinked inode */
1522         }
1523
1524 #if 0
1525         if (request_body != NULL && mfd->mfd_mode & FMODE_WRITE && rc == 0) {
1526                 /* Update the on-disk attributes if this was the last write
1527                  * close, and all information was provided (i.e., rc == 0)
1528                  *
1529                  * XXX this should probably be abstracted with mds_reint_setattr
1530                  */
1531
1532                 if (request_body->valid & OBD_MD_FLMTIME &&
1533                     LTIME_S(request_body->mtime) > LTIME_S(inode->i_mtime)) {
1534                         LTIME_S(iattr.ia_mtime) = LTIME_S(request_body->mtime);
1535                         iattr.ia_valid |= ATTR_MTIME;
1536                 }
1537                 if (request_body->valid & OBD_MD_FLCTIME &&
1538                     LTIME_S(request_body->ctime) > LTIME_S(inode->i_ctime)) {
1539                         LTIME_S(iattr.ia_ctime) = LTIME_S(request_body->ctime);
1540                         iattr.ia_valid |= ATTR_CTIME;
1541                 }
1542
1543                 /* XXX can't set block count with fsfilt_setattr (!) */
1544                 if (request_body->valid & OBD_MD_FLSIZE) {
1545                         iattr.ia_valid |= ATTR_SIZE;
1546                         iattr.ia_size = request_body->size;
1547                 }
1548                 /* if (request_body->valid & OBD_MD_FLBLOCKS) {
1549                         iattr.ia_valid |= ATTR_BLOCKS;
1550                         iattr.ia_blocks = request_body->blocks
1551                 } */
1552
1553         }
1554 #endif
1555         if (request_body != NULL && request_body->valid & OBD_MD_FLATIME) {
1556                 /* Only start a transaction to write out only the atime if
1557                  * it is more out-of-date than the specified limit.  If we
1558                  * are already going to write out the atime then do it anyway.
1559                  * */
1560                 if ((request_body->atime >
1561                      LTIME_S(inode->i_atime) + MAX_ATIME_DIFF) ||
1562                     (iattr.ia_valid != 0 &&
1563                      request_body->atime > LTIME_S(inode->i_atime))) {
1564                         LTIME_S(iattr.ia_atime) = request_body->atime;
1565                         iattr.ia_valid |= ATTR_ATIME;
1566                 }
1567         }
1568
1569         if (iattr.ia_valid != 0) {
1570                 handle = fsfilt_start(obd, inode, FSFILT_OP_SETATTR, NULL);
1571                 if (IS_ERR(handle))
1572                         GOTO(cleanup, rc = PTR_ERR(handle));
1573                 rc = fsfilt_setattr(obd, mfd->mfd_dentry, handle, &iattr, 0);
1574                 if (rc)
1575                         CERROR("error in setattr(%s): rc %d\n", idname, rc);
1576         }
1577 out:
1578         /* If other clients have this file open for write, rc will be > 0 */
1579         if (rc > 0)
1580                 rc = 0;
1581         l_dput(mfd->mfd_dentry);
1582         mds_mfd_destroy(mfd);
1583
1584  cleanup:
1585         atomic_dec(&mds->mds_open_count);
1586         if (req != NULL && reply_body != NULL) {
1587                 rc = mds_finish_transno(mds, pending_dir, handle, req, rc, 0);
1588         } else if (handle) {
1589                 int err, force_sync = 0;
1590
1591                 if (req && req->rq_export)
1592                         force_sync = req->rq_export->exp_sync;
1593
1594                 err = fsfilt_commit(obd, mds->mds_sb, pending_dir, handle,
1595                                     force_sync);
1596                 if (err) {
1597                         CERROR("error committing close: %d\n", err);
1598                         if (!rc)
1599                                 rc = err;
1600                 }
1601         }
1602
1603         switch (cleanup_phase) {
1604         case 2:
1605                 if (lcl != NULL)
1606                         ptlrpc_save_llog_lock(req, lcl);
1607                 dput(pending_child);
1608         case 1:
1609                 up(&pending_dir->i_sem);
1610         }
1611         RETURN(rc);
1612 }
1613
1614 int mds_close(struct ptlrpc_request *req, int offset)
1615 {
1616         struct mds_export_data *med = &req->rq_export->exp_mds_data;
1617         struct obd_device *obd = req->rq_export->exp_obd;
1618         struct mds_body *body;
1619         struct mds_file_data *mfd;
1620         struct lvfs_run_ctxt saved;
1621         struct inode *inode;
1622         int rc, repsize[3] = {sizeof(struct mds_body),
1623                               obd->u.mds.mds_max_mdsize,
1624                               obd->u.mds.mds_max_cookiesize};
1625         ENTRY;
1626         MD_COUNTER_INCREMENT(obd, close);
1627
1628         rc = lustre_pack_reply(req, 3, repsize, NULL);
1629         if (rc) {
1630                 CERROR("lustre_pack_reply: rc = %d\n", rc);
1631                 req->rq_status = rc;
1632         } else {
1633                 MDS_CHECK_RESENT(req, mds_reconstruct_generic(req));
1634         }
1635
1636         if (lustre_msg_get_flags(req->rq_reqmsg) & MSG_REPLAY) {
1637                 DEBUG_REQ(D_HA, req, "close replay");
1638                 memcpy(lustre_msg_buf(req->rq_repmsg, 2, 0),
1639                        lustre_msg_buf(req->rq_reqmsg, offset + 1, 0),
1640                        req->rq_repmsg->buflens[2]);
1641         }
1642
1643         body = lustre_swab_reqbuf(req, offset, sizeof(*body),
1644                                   lustre_swab_mds_body);
1645         if (body == NULL) {
1646                 CERROR("Can't unpack body\n");
1647                 req->rq_status = -EFAULT;
1648                 RETURN(-EFAULT);
1649         }
1650
1651         if (body->flags & MDS_BFLAG_UNCOMMITTED_WRITES)
1652                 /* do some stuff */ ;
1653
1654         mfd = mds_handle2mfd(&body->handle);
1655         if (mfd == NULL) {
1656                 DEBUG_REQ(D_ERROR, req, "no handle for file close ino "LPD64
1657                           ": cookie "LPX64, id_ino(&body->id1), body->handle.cookie);
1658                 req->rq_status = -ESTALE;
1659                 RETURN(-ESTALE);
1660         }
1661
1662         inode = mfd->mfd_dentry->d_inode;
1663         /* child i_alloc_sem protects orphan_dec_test && is_orphan race */
1664         DOWN_WRITE_I_ALLOC_SEM(inode); /* mds_mfd_close drops this */
1665         if (mds_inode_is_orphan(inode) && mds_orphan_open_count(inode) == 1) {
1666                 struct mds_body *rep_body;
1667
1668                 rep_body = lustre_msg_buf(req->rq_repmsg, 0,
1669                                           sizeof (*rep_body));
1670                 LASSERT(rep_body != NULL);
1671
1672                 mds_pack_inode2body(obd, rep_body, inode,
1673                                     (body->valid & OBD_MD_FID) ? 1 : 0);
1674
1675                 mds_pack_md(obd, req->rq_repmsg, 1, rep_body,
1676                             inode, MDS_PACK_MD_LOCK, 0);
1677         }
1678         spin_lock(&med->med_open_lock);
1679         list_del(&mfd->mfd_list);
1680         spin_unlock(&med->med_open_lock);
1681
1682         push_ctxt(&saved, &obd->obd_lvfs_ctxt, NULL);
1683         req->rq_status = mds_mfd_close(req, offset, obd, mfd, 1);
1684         pop_ctxt(&saved, &obd->obd_lvfs_ctxt, NULL);
1685
1686         if (OBD_FAIL_CHECK(OBD_FAIL_MDS_CLOSE_PACK)) {
1687                 CERROR("test case OBD_FAIL_MDS_CLOSE_PACK\n");
1688                 req->rq_status = -ENOMEM;
1689                 mds_mfd_put(mfd);
1690                 RETURN(-ENOMEM);
1691         }
1692
1693         mds_mfd_put(mfd);
1694         RETURN(0);
1695 }
1696
1697 int mds_done_writing(struct ptlrpc_request *req, int offset)
1698 {
1699         struct mds_body *body;
1700         int rc, size = sizeof(struct mds_body);
1701         ENTRY;
1702
1703         MDS_CHECK_RESENT(req, mds_reconstruct_generic(req));
1704
1705         body = lustre_swab_reqbuf(req, offset, sizeof(*body),
1706                                   lustre_swab_mds_body);
1707         if (body == NULL) {
1708                 CERROR("Can't unpack body\n");
1709                 req->rq_status = -EFAULT;
1710                 RETURN(-EFAULT);
1711         }
1712
1713         rc = lustre_pack_reply(req, 1, &size, NULL);
1714         if (rc) {
1715                 CERROR("lustre_pack_reply: rc = %d\n", rc);
1716                 req->rq_status = rc;
1717         }
1718
1719         RETURN(0);
1720 }