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 /* this is object id allocation callback */
 301 static int mds_obj_alloc(obd_id *objid)
 302 {
 303         ENTRY;
 304         LASSERT(objid != NULL);
 305         RETURN(++(*objid));
 306 }
 307
 308 static inline void
 309 mds_objids_from_lmm(obd_id *ids, struct lov_mds_md *lmm,
 310                     struct lov_desc *desc)
 311 {
 312         int i;
 313
 314         for (i = 0; i < le32_to_cpu(lmm->lmm_stripe_count); i++) {
 315                 ids[le32_to_cpu(lmm->lmm_objects[i].l_ost_idx)] =
 316                         le64_to_cpu(lmm->lmm_objects[i].l_object_id);
 317         }
 318 }
 319
 320 /* must be called with i_sem held */
 321 int
 322 mds_create_object(struct obd_device *obd, struct ptlrpc_request *req,
 323                   int offset, struct mds_update_record *rec,
 324                   struct dentry *dchild, void **handle,
 325                   obd_id *ids)
 326 {
 327         struct inode *inode = dchild->d_inode;
 328         struct mds_obd *mds = &obd->u.mds;
 329         struct obd_trans_info oti = { 0 };
 330         struct lov_stripe_md *lsm = NULL;
 331         struct lov_mds_md *lmm = NULL;
 332         int rc, lmm_bufsize, lmm_size;
 333         struct obdo *oa = NULL;
 334         struct mds_body *body;
 335         void *lmm_buf;
 336         ENTRY;
 337
 338         if (rec->ur_flags & MDS_OPEN_DELAY_CREATE ||
 339             !(rec->ur_flags & FMODE_WRITE))
 340                 RETURN(0);
 341
 342         body = lustre_msg_buf(req->rq_repmsg, 1, sizeof(*body));
 343
 344         if (!S_ISREG(inode->i_mode))
 345                 RETURN(0);
 346         if (body->valid & OBD_MD_FLEASIZE)
 347                 RETURN(0);
 348
 349         oti.oti_objid = ids;
 350
 351         /* replay case */
 352         if (lustre_msg_get_flags(req->rq_reqmsg) & MSG_REPLAY) {
 353                 LASSERT(id_ino(rec->ur_id2));
 354                 body->valid |= OBD_MD_FLBLKSZ | OBD_MD_FLEASIZE;
 355                 lmm_size = rec->ur_eadatalen;
 356                 lmm = rec->ur_eadata;
 357                 LASSERT(lmm);
 358
 359                 if (*handle == NULL)
 360                         *handle = fsfilt_start(obd, inode, FSFILT_OP_CREATE, NULL);
 361                 if (IS_ERR(*handle)) {
 362                         rc = PTR_ERR(*handle);
 363                         *handle = NULL;
 364                         RETURN(rc);
 365                 }
 366
 367                 /*
 368                  * FIXME: this is evil layering violation, all things related to
 369                  * stripping should be done by LOV.  --umka.
 370                  */
 371                 mds_objids_from_lmm(ids, lmm, &mds->mds_dt_desc);
 372
 373                 lmm_buf = lustre_msg_buf(req->rq_repmsg, offset, 0);
 374                 lmm_bufsize = req->rq_repmsg->buflens[offset];
 375
 376                 LASSERT(lmm_buf != NULL);
 377                 LASSERT(lmm_bufsize >= lmm_size);
 378
 379                 memcpy(lmm_buf, lmm, lmm_size);
 380                 rc = fsfilt_set_md(obd, inode, *handle, lmm,
 381                                    lmm_size, EA_LOV);
 382                 if (rc)
 383                         CERROR("open replay failed to set md:%d\n", rc);
 384                 RETURN(0);
 385         }
 386
 387         if (OBD_FAIL_CHECK_ONCE(OBD_FAIL_MDS_ALLOC_OBDO))
 388                 RETURN(-ENOMEM);
 389
 390         oa = obdo_alloc();
 391         if (oa == NULL)
 392                 RETURN(-ENOMEM);
 393         oa->o_mode = S_IFREG | 0600;
 394         oa->o_id = inode->i_ino;
 395         oa->o_gr = FILTER_GROUP_FIRST_MDS + mds->mds_num;
 396         oa->o_generation = inode->i_generation;
 397         oa->o_uid = 0; /* must have 0 uid / gid on OST */
 398         oa->o_gid = 0;
 399         oa->o_valid = OBD_MD_FLID | OBD_MD_FLTYPE | OBD_MD_FLMODE |
 400                         OBD_MD_FLUID | OBD_MD_FLGID | OBD_MD_FLGROUP;
 401         oa->o_size = 0;
 402
 403         obdo_from_inode(oa, inode, OBD_MD_FLTYPE | OBD_MD_FLATIME |
 404                         OBD_MD_FLMTIME | OBD_MD_FLCTIME);
 405
 406         if (!(rec->ur_flags & MDS_OPEN_HAS_OBJS)) {
 407                 /* check if things like lfs setstripe are sending us the ea */
 408                 if (rec->ur_flags & MDS_OPEN_HAS_EA) {
 409                         rc = obd_iocontrol(OBD_IOC_LOV_SETSTRIPE,
 410                                            mds->mds_dt_exp,
 411                                            0, &lsm, rec->ur_eadata);
 412                         if (rc)
 413                                 GOTO(out_oa, rc);
 414                 } else {
 415                         OBD_ALLOC(lmm, mds->mds_max_mdsize);
 416                         if (lmm == NULL)
 417                                 GOTO(out_oa, rc = -ENOMEM);
 418
 419                         lmm_size = mds->mds_max_mdsize;
 420                         rc = mds_get_md(obd, dchild->d_parent->d_inode,
 421                                         lmm, &lmm_size, 1, 0);
 422                         if (rc > 0)
 423                                 rc = obd_iocontrol(OBD_IOC_LOV_SETSTRIPE,
 424                                                    mds->mds_dt_exp,
 425                                                    0, &lsm, lmm);
 426                         OBD_FREE(lmm, mds->mds_max_mdsize);
 427                         if (rc)
 428                                 GOTO(out_oa, rc);
 429                 }
 430
 431                 /*
 432                  * create with CROW flag and base ids for allocating new ids on
 433                  * them.
 434                  */
 435                 oti.oti_flags |= OBD_MODE_CROW;
 436                 oti.oti_obj_alloc = mds_obj_alloc;
 437
 438                 LASSERT(oa->o_gr >= FILTER_GROUP_FIRST_MDS);
 439                 rc = obd_create(mds->mds_dt_exp, oa, NULL, 0, &lsm, &oti);
 440
 441                 if (rc) {
 442                         int level = D_ERROR;
 443                         if (rc == -ENOSPC)
 444                                 level = D_INODE;
 445                         CDEBUG((rc == -ENOSPC ? D_INODE : D_ERROR),
 446                                "error creating objects for "
 447                                "inode %lu: rc = %d\n",
 448                                inode->i_ino, rc);
 449                         if (rc > 0) {
 450                                 CERROR("obd_create returned invalid "
 451                                        "rc %d\n", rc);
 452                                 rc = -EIO;
 453                         }
 454                         GOTO(out_oa, rc);
 455                 }
 456         } else {
 457                 rc = obd_iocontrol(OBD_IOC_LOV_SETEA, mds->mds_dt_exp,
 458                                    0, &lsm, rec->ur_eadata);
 459                 if (rc)
 460                         GOTO(out_oa, rc);
 461
 462                 lsm->lsm_object_id = oa->o_id;
 463                 lsm->lsm_object_gr = oa->o_gr;
 464         }
 465         if (inode->i_size) {
 466                 oa->o_size = inode->i_size;
 467                 obdo_from_inode(oa, inode, OBD_MD_FLTYPE | OBD_MD_FLATIME |
 468                                 OBD_MD_FLMTIME | OBD_MD_FLCTIME | OBD_MD_FLSIZE);
 469
 470                 rc = obd_setattr(mds->mds_dt_exp, oa, lsm, &oti);
 471                 if (rc) {
 472                         CERROR("error setting attrs for inode %lu: rc %d\n",
 473                                inode->i_ino, rc);
 474                         if (rc > 0) {
 475                                 CERROR("obd_setattr returned bad rc %d\n", rc);
 476                                 rc = -EIO;
 477                         }
 478                         GOTO(out_oa, rc);
 479                 }
 480         }
 481
 482         body->valid |= OBD_MD_FLBLKSZ | OBD_MD_FLEASIZE;
 483         obdo_refresh_inode(inode, oa, OBD_MD_FLBLKSZ);
 484
 485         LASSERT(lsm && lsm->lsm_object_id);
 486         lmm = NULL;
 487         rc = obd_packmd(mds->mds_dt_exp, &lmm, lsm);
 488         if (!id_ino(rec->ur_id2))
 489                 obd_free_memmd(mds->mds_dt_exp, &lsm);
 490         if (rc < 0) {
 491                 CERROR("cannot pack lsm, err = %d\n", rc);
 492                 GOTO(out_oa, rc);
 493         }
 494
 495         lmm_size = rc;
 496         body->eadatasize = rc;
 497
 498         if (*handle == NULL)
 499                 *handle = fsfilt_start(obd, inode, FSFILT_OP_CREATE, NULL);
 500         if (IS_ERR(*handle)) {
 501                 rc = PTR_ERR(*handle);
 502                 *handle = NULL;
 503                 GOTO(out_oa, rc);
 504         }
 505
 506         rc = fsfilt_set_md(obd, inode, *handle, lmm,
 507                            lmm_size, EA_LOV);
 508
 509         lmm_buf = lustre_msg_buf(req->rq_repmsg, offset, 0);
 510         lmm_bufsize = req->rq_repmsg->buflens[offset];
 511         LASSERT(lmm_buf);
 512         LASSERT(lmm_bufsize >= lmm_size);
 513
 514         memcpy(lmm_buf, lmm, lmm_size);
 515         obd_free_diskmd(mds->mds_dt_exp, &lmm);
 516 out_oa:
 517         oti_free_cookies(&oti);
 518         obdo_free(oa);
 519
 520         if (lsm)
 521                 obd_free_memmd(mds->mds_dt_exp, &lsm);
 522         RETURN(rc);
 523 }
 524
 525 int
 526 mds_destroy_object(struct obd_device *obd,
 527                    struct inode *inode, int async)
 528 {
 529         struct mds_obd *mds = &obd->u.mds;
 530         struct lov_mds_md *lmm = NULL;
 531         int rc, lmm_size;
 532         ENTRY;
 533
 534         LASSERT(inode != NULL);
 535
 536         if (inode->i_nlink != 0) {
 537                 CDEBUG(D_INODE, "attempt to destroy OSS object when "
 538                        "i_nlink == %d\n", (int)inode->i_nlink);
 539                 RETURN(0);
 540         }
 541
 542         OBD_ALLOC(lmm, mds->mds_max_mdsize);
 543         if (lmm == NULL)
 544                 RETURN(-ENOMEM);
 545
 546         lmm_size = mds->mds_max_mdsize;
 547         rc = mds_get_md(obd, inode, lmm, &lmm_size, 1, 0);
 548         if (rc < 0) {
 549                 CERROR("no stripe info for %lu/%lu inode\n",
 550                        (unsigned long)inode->i_ino,
 551                        (unsigned long)inode->i_generation);
 552                 GOTO(out_free_lmm, rc);
 553         }
 554
 555         if (rc > 0) {
 556                 /* asynchronously unlink objecect on OSS */
 557                 rc = mds_unlink_object(mds, inode, lmm, lmm_size,
 558                                        NULL, 0, async);
 559                 if (rc) {
 560                         CERROR("error unlinking object on OSS, "
 561                                "err %d\n", rc);
 562                         GOTO(out_free_lmm, rc);
 563                 }
 564         } else {
 565                 CDEBUG(D_INODE, "no stripping info found for inode "
 566                       "%lu/%lu\n", (unsigned long)inode->i_ino,
 567                       (unsigned long)inode->i_generation);
 568         }
 569         EXIT;
 570 out_free_lmm:
 571         OBD_FREE(lmm, mds->mds_max_mdsize);
 572         return rc;
 573 }
 574
 575 static void reconstruct_open(struct mds_update_record *rec, int offset,
 576                              struct ptlrpc_request *req,
 577                              struct lustre_handle *child_lockh)
 578 {
 579         struct mds_export_data *med = &req->rq_export->exp_mds_data;
 580         struct mds_client_data *mcd = med->med_mcd;
 581         struct mds_obd *mds = mds_req2mds(req);
 582         struct mds_file_data *mfd;
 583         struct obd_device *obd = req->rq_export->exp_obd;
 584         struct dentry *parent = NULL, *dchild;
 585         struct ldlm_reply *rep;
 586         struct mds_body *body;
 587         struct list_head *t;
 588         int put_child = 1;
 589         int rc;
 590         ENTRY;
 591
 592         LASSERT(offset == 3); /* only called via intent */
 593         rep = lustre_msg_buf(req->rq_repmsg, 0, sizeof (*rep));
 594         body = lustre_msg_buf(req->rq_repmsg, 1, sizeof (*body));
 595
 596         /* copy rc, transno and disp; steal locks */
 597         mds_req_from_mcd(req, mcd);
 598         intent_set_disposition(rep, mcd->mcd_last_data);
 599
 600         /* Only replay if create or open actually happened. */
 601         if (!intent_disposition(rep, DISP_OPEN_CREATE | DISP_OPEN_OPEN) ) {
 602                 EXIT;
 603                 return; /* error looking up parent or child */
 604         }
 605
 606         if (rec->ur_namelen == 1) {
 607                 CDEBUG(D_HA, "OPEN by fid "DLID4" (RESENT)\n",
 608                        OLID4(rec->ur_id1));
 609                 dchild = mds_id2dentry(obd, rec->ur_id1, NULL);
 610         } else {
 611                 parent = mds_id2dentry(obd, rec->ur_id1, NULL);
 612                 LASSERTF(!IS_ERR(parent), "lid "DLID4" rc %ld\n",
 613                                 OLID4(rec->ur_id1), PTR_ERR(parent));
 614                 dchild = ll_lookup_one_len(rec->ur_name, parent,
 615                                 rec->ur_namelen - 1);
 616                 LASSERTF(!IS_ERR(dchild), "parent "DLID4" child %s rc %ld\n",
 617                                 OLID4(rec->ur_id1), rec->ur_name, PTR_ERR(dchild));
 618         }
 619
 620         if (!dchild->d_inode)
 621                 GOTO(out_dput, 0); /* child not present to open */
 622
 623         /* At this point, we know we have a child. We'll send
 624          * it back _unless_ it not created and open failed.  */
 625         if (intent_disposition(rep, DISP_OPEN_OPEN) &&
 626             !intent_disposition(rep, DISP_OPEN_CREATE) &&
 627             req->rq_status)
 628                 GOTO(out_dput, 0);
 629
 630         /* get lock (write for O_CREAT, read otherwise) */
 631         mds_pack_inode2body(obd, body, dchild->d_inode, 1);
 632         if (S_ISREG(dchild->d_inode->i_mode)) {
 633                 rc = mds_pack_md(obd, req->rq_repmsg, 2, body,
 634                                  dchild->d_inode, 1, 0);
 635
 636                 if (rc)
 637                         LASSERT(rc == req->rq_status);
 638
 639                 /* If we have LOV EA data, the OST holds size, mtime */
 640                 if (!(body->valid & OBD_MD_FLEASIZE))
 641                         body->valid |= (OBD_MD_FLSIZE | OBD_MD_FLBLOCKS |
 642                                         OBD_MD_FLATIME | OBD_MD_FLMTIME);
 643         }
 644
 645         /* If we have -EEXIST as the status, and we were asked to create
 646          * exclusively, we can tell we failed because the file already existed.
 647          */
 648         if (req->rq_status == -EEXIST &&
 649             ((rec->ur_flags & (MDS_OPEN_CREAT | MDS_OPEN_EXCL)) ==
 650              (MDS_OPEN_CREAT | MDS_OPEN_EXCL))) {
 651                 GOTO(out_dput, 0);
 652         }
 653
 654         /* If we didn't get as far as trying to open, then some locking thing
 655          * probably went wrong, and we'll just bail here.
 656          */
 657         if (!intent_disposition(rep, DISP_OPEN_OPEN))
 658                 GOTO(out_dput, 0);
 659
 660         /* If we failed, then we must have failed opening, so don't look for
 661          * file descriptor or anything, just give the client the bad news.
 662          */
 663         if (req->rq_status)
 664                 GOTO(out_dput, 0);
 665
 666         mfd = NULL;
 667         list_for_each(t, &med->med_open_head) {
 668                 mfd = list_entry(t, struct mds_file_data, mfd_list);
 669                 if (mfd->mfd_xid == req->rq_xid)
 670                         break;
 671                 mfd = NULL;
 672         }
 673
 674         /* #warning "XXX fixme" bug 2991 */
 675         /* Here it used to LASSERT(mfd) if exp_outstanding_reply != NULL.
 676          * Now that exp_outstanding_reply is a list, it's just using mfd != NULL
 677          * to detect a re-open */
 678         if (mfd == NULL) {
 679                 mntget(mds->mds_vfsmnt);
 680                 CERROR("Re-opened file \n");
 681                 mfd = mds_dentry_open(dchild, mds->mds_vfsmnt,
 682                                       rec->ur_flags & ~MDS_OPEN_TRUNC, req);
 683                 if (!mfd) {
 684                         CERROR("mds: out of memory\n");
 685                         GOTO(out_dput, req->rq_status = -ENOMEM);
 686                 }
 687                 put_child = 0;
 688         } else {
 689                 body->handle.cookie = mfd->mfd_handle.h_cookie;
 690                 CDEBUG(D_INODE, "resend mfd %p, cookie "LPX64"\n", mfd,
 691                        mfd->mfd_handle.h_cookie);
 692         }
 693
 694  out_dput:
 695         if (put_child)
 696                 l_dput(dchild);
 697         if (parent)
 698                 l_dput(parent);
 699         EXIT;
 700 }
 701
 702 /* do NOT or the MAY_*'s, you'll get the weakest */
 703 static int accmode(int flags)
 704 {
 705         int res = 0;
 706
 707         if (flags & FMODE_READ)
 708                 res = MAY_READ;
 709         if (flags & (FMODE_WRITE|MDS_OPEN_TRUNC))
 710                 res |= MAY_WRITE;
 711         if (flags & FMODE_EXEC)
 712                 res = MAY_EXEC;
 713         return res;
 714 }
 715
 716 /* Handles object creation, actual opening, and I/O epoch */
 717 static int mds_finish_open(struct ptlrpc_request *req, struct dentry *dchild,
 718                            struct mds_body *body, int flags, void **handle,
 719                            struct mds_update_record *rec, struct ldlm_reply *rep)
 720 {
 721         struct obd_device *obd = req->rq_export->exp_obd;
 722         struct mds_obd *mds = mds_req2mds(req);
 723         struct mds_file_data *mfd = NULL;
 724         obd_id *ids = NULL;
 725         unsigned mode;
 726         int rc = 0;
 727         ENTRY;
 728
 729         /* atomically create objects if necessary */
 730         down(&dchild->d_inode->i_sem);
 731         mode = dchild->d_inode->i_mode;
 732
 733         if ((S_ISREG(mode) && !(body->valid & OBD_MD_FLEASIZE)) ||
 734             (S_ISDIR(mode) && !(body->valid & OBD_MD_FLDIREA))) {
 735                 rc = mds_pack_md(obd, req->rq_repmsg, 2, body,
 736                                  dchild->d_inode, 0, 0);
 737                 if (rc) {
 738                         up(&dchild->d_inode->i_sem);
 739                         RETURN(rc);
 740                 }
 741         }
 742
 743         if (rec != NULL) {
 744                 /* no EA: create objects */
 745                 if ((body->valid & OBD_MD_FLEASIZE) &&
 746                     (rec->ur_flags & MDS_OPEN_HAS_EA)) {
 747                         up(&dchild->d_inode->i_sem);
 748                         RETURN(-EEXIST);
 749                 }
 750
 751                 if (!(body->valid & OBD_MD_FLEASIZE)) {
 752                         int ids_size = mds->mds_dt_desc.ld_tgt_count * sizeof(*ids);
 753
 754                         OBD_ALLOC(ids, ids_size);
 755                         if (ids == NULL) {
 756                                 up(&dchild->d_inode->i_sem);
 757                                 RETURN(-ENOMEM);
 758                         }
 759
 760                         /*
 761                          * synchronizing object creating to prevent another
 762                          * threads take the same base objid values.
 763                          */
 764                         down(&mds->mds_create_sem);
 765
 766                         /* preparing base ids */
 767                         mds_dt_save_objids(obd, ids);
 768
 769                         /*
 770                          * create objects, @ids will contain new allocated obj
 771                          * ids.
 772                          */
 773                         rc = mds_create_object(obd, req, 2, rec,
 774                                                dchild, handle, ids);
 775                         if (rc) {
 776                                 CERROR("mds_create_object: rc = %d\n", rc);
 777                                 up(&mds->mds_create_sem);
 778                                 up(&dchild->d_inode->i_sem);
 779                                 OBD_FREE(ids, ids_size);
 780                                 RETURN(rc);
 781                         }
 782
 783                         /*
 784                          * update MDS objids by new ones allocated in
 785                          * mds_create_object().
 786                          */
 787                         mds_dt_update_objids(obd, ids);
 788                         OBD_FREE(ids, ids_size);
 789
 790                         up(&mds->mds_create_sem);
 791                 }
 792
 793                 if (S_ISREG(dchild->d_inode->i_mode) &&
 794                     (body->valid & OBD_MD_FLEASIZE)) {
 795                         rc = mds_revalidate_lov_ea(obd, dchild->d_inode,
 796                                                    req->rq_repmsg, 2);
 797                         if (!rc)
 798                                 rc = mds_pack_md(obd, req->rq_repmsg, 2, body,
 799                                                  dchild->d_inode, 0, 0);
 800                         if (rc) {
 801                                 up(&dchild->d_inode->i_sem);
 802                                 RETURN(rc);
 803                         }
 804                 }
 805         }
 806
 807         rc = mds_pack_acl(obd, req->rq_repmsg, 3, body, dchild->d_inode);
 808         if (rc < 0) {
 809                 CERROR("mds_pack_acl: rc = %d\n", rc);
 810                 up(&dchild->d_inode->i_sem);
 811                 RETURN(rc);
 812         }
 813
 814         /* If the inode has no EA data, then MDSs hold size, mtime */
 815         if (S_ISREG(dchild->d_inode->i_mode) &&
 816             !(body->valid & OBD_MD_FLEASIZE)) {
 817                 body->valid |= (OBD_MD_FLSIZE | OBD_MD_FLBLOCKS |
 818                                 OBD_MD_FLATIME | OBD_MD_FLMTIME);
 819         }
 820
 821         up(&dchild->d_inode->i_sem);
 822
 823         intent_set_disposition(rep, DISP_OPEN_OPEN);
 824         mfd = mds_dentry_open(dchild, mds->mds_vfsmnt, flags, req);
 825         if (IS_ERR(mfd))
 826                 RETURN(PTR_ERR(mfd));
 827
 828         CDEBUG(D_INODE, "mfd %p, cookie "LPX64"\n", mfd,
 829                mfd->mfd_handle.h_cookie);
 830         RETURN(rc);
 831 }
 832
 833 static int mds_open_by_id(struct ptlrpc_request *req,
 834                           struct lustre_id *id,
 835                           struct mds_body *body, int flags,
 836                           struct mds_update_record *rec,
 837                           struct ldlm_reply *rep)
 838 {
 839         struct mds_obd *mds = mds_req2mds(req);
 840         struct inode *pending_dir = mds->mds_pending_dir->d_inode;
 841         struct dentry *dchild;
 842         char idname[LL_ID_NAMELEN];
 843         int idlen = 0, rc;
 844         void *handle = NULL;
 845         ENTRY;
 846
 847         down(&pending_dir->i_sem);
 848         idlen = ll_id2str(idname, id_ino(id), id_gen(id));
 849         dchild = lookup_one_len(idname, mds->mds_pending_dir,
 850                                 idlen);
 851         if (IS_ERR(dchild)) {
 852                 up(&pending_dir->i_sem);
 853                 rc = PTR_ERR(dchild);
 854                 CERROR("error looking up %s in PENDING: rc = %d\n",
 855                        idname, rc);
 856                 RETURN(rc);
 857         }
 858
 859         up(&pending_dir->i_sem);
 860         if (dchild->d_inode != NULL) {
 861                 mds_inode_set_orphan(dchild->d_inode);
 862                 mds_pack_inode2body(req2obd(req), body,
 863                                     dchild->d_inode, 1);
 864
 865                 intent_set_disposition(rep, DISP_LOOKUP_EXECD);
 866                 intent_set_disposition(rep, DISP_LOOKUP_POS);
 867                 CWARN("Orphan %s found and opened in PENDING directory\n",
 868                        idname);
 869                 goto open;
 870         }
 871         l_dput(dchild);
 872
 873         /*
 874          * we didn't find it in PENDING so it isn't an orphan.  See if it was a
 875          * regular inode that was previously created.
 876          */
 877         dchild = mds_id2dentry(req2obd(req), id, NULL);
 878         if (IS_ERR(dchild))
 879                 RETURN(PTR_ERR(dchild));
 880
 881         mds_pack_inode2body(req2obd(req), body,
 882                             dchild->d_inode, 1);
 883
 884         intent_set_disposition(rep, DISP_LOOKUP_EXECD);
 885         intent_set_disposition(rep, DISP_LOOKUP_POS);
 886
 887  open:
 888         rc = mds_finish_open(req, dchild, body, flags, &handle, rec, rep);
 889         rc = mds_finish_transno(mds, dchild ? dchild->d_inode : NULL, handle,
 890                                 req, rc, rep ? rep->lock_policy_res1 : 0);
 891         /* XXX what do we do here if mds_finish_transno itself failed? */
 892         l_dput(dchild);
 893         RETURN(rc);
 894 }
 895
 896 int mds_pin(struct ptlrpc_request *req, int offset)
 897 {
 898         struct obd_device *obd = req->rq_export->exp_obd;
 899         struct mds_body *request_body, *reply_body;
 900         struct lvfs_run_ctxt saved;
 901         int rc, size = sizeof(*reply_body);
 902         ENTRY;
 903
 904         request_body = lustre_msg_buf(req->rq_reqmsg, offset,
 905                                       sizeof(*request_body));
 906
 907         rc = lustre_pack_reply(req, 1, &size, NULL);
 908         if (rc)
 909                 RETURN(rc);
 910         reply_body = lustre_msg_buf(req->rq_repmsg, 0, sizeof(*reply_body));
 911
 912         push_ctxt(&saved, &obd->obd_lvfs_ctxt, NULL);
 913         rc = mds_open_by_id(req, &request_body->id1, reply_body,
 914                             request_body->flags, NULL, NULL);
 915         pop_ctxt(&saved, &obd->obd_lvfs_ctxt, NULL);
 916
 917         RETURN(rc);
 918 }
 919
 920 /*
 921  * get a lock on the ino to sync with creation WRT inode reuse (bug 2029). If
 922  * child_lockh is NULL we just get the lock as a barrier to wait for other
 923  * holders of this lock, and drop it right away again.
 924  */
 925 int mds_lock_new_child(struct obd_device *obd, struct inode *inode,
 926                        struct lustre_handle *child_lockh)
 927 {
 928         struct ldlm_res_id child_res_id = { .name = { inode->i_ino, 0, 1, 0 } };
 929         struct lustre_handle lockh;
 930         int lock_flags = 0;
 931         int rc;
 932         ENTRY;
 933
 934         if (child_lockh == NULL)
 935                 child_lockh = &lockh;
 936
 937         rc = ldlm_cli_enqueue(NULL, NULL, obd->obd_namespace, child_res_id,
 938                               LDLM_PLAIN, NULL, LCK_EX, &lock_flags,
 939                               mds_blocking_ast, ldlm_completion_ast, NULL,
 940                               NULL, NULL, 0, NULL, child_lockh);
 941         if (rc != ELDLM_OK)
 942                 CERROR("ldlm_cli_enqueue: %d\n", rc);
 943         else if (child_lockh == &lockh)
 944                 ldlm_lock_decref(child_lockh, LCK_EX);
 945
 946         RETURN(rc);
 947 }
 948
 949 int mds_open(struct mds_update_record *rec, int offset,
 950              struct ptlrpc_request *req, struct lustre_handle *child_lockh)
 951 {
 952         /* XXX ALLOCATE _something_ - 464 bytes on stack here */
 953         struct obd_device *obd = req->rq_export->exp_obd;
 954         struct mds_export_data *med = &req->rq_export->u.eu_mds_data;
 955         struct mds_obd *mds = mds_req2mds(req);
 956         struct ldlm_reply *rep = NULL;
 957         struct mds_body *body = NULL;
 958         struct dentry *dchild = NULL, *dparent = NULL;
 959         struct lustre_handle parent_lockh[2] = {{0}, {0}};
 960         int rc = 0, cleanup_phase = 0, acc_mode, created = 0;
 961         int parent_mode = LCK_PR;
 962         void *handle = NULL;
 963         struct dentry_params dp;
 964         struct mea *mea = NULL;
 965         int mea_size, update_mode;
 966         int child_mode = LCK_PR;
 967         /* Always returning LOOKUP lock if open succesful to guard
 968            dentry on client. */
 969         ldlm_policy_data_t policy = {.l_inodebits={MDS_INODELOCK_LOOKUP}};
 970         struct ldlm_res_id child_res_id = { .name = {0}};
 971         int lock_flags = 0;
 972         ENTRY;
 973
 974         DEBUG_REQ(D_INODE, req, "parent "DLID4" name %*s mode %o",
 975                   OLID4(rec->ur_id1), rec->ur_namelen - 1, rec->ur_name,
 976                   rec->ur_mode);
 977
 978         OBD_FAIL_TIMEOUT(OBD_FAIL_MDS_PAUSE_OPEN | OBD_FAIL_ONCE,
 979                          (obd_timeout + 1) / 4);
 980
 981         if (offset == 3) { /* intent */
 982                 rep = lustre_msg_buf(req->rq_repmsg, 0, sizeof (*rep));
 983                 body = lustre_msg_buf(req->rq_repmsg, 1, sizeof (*body));
 984         } else if (offset == 1) { /* non-intent reint */
 985                 body = lustre_msg_buf(req->rq_repmsg, 0, sizeof (*body));
 986         } else {
 987                 body = NULL;
 988                 LBUG();
 989         }
 990
 991         MDS_CHECK_RESENT(req, reconstruct_open(rec, offset, req, child_lockh));
 992
 993         /*
 994          * Step 0: If we are passed a id, then we assume the client already
 995          * opened this file and is only replaying the RPC, so we open the inode
 996          * by fid (at some large expense in security).
 997          */
 998         if (lustre_msg_get_flags(req->rq_reqmsg) & MSG_REPLAY) {
 999                 CDEBUG(D_HA, "open obj "DLID4" name %*s mode %o\n",
1000                        OLID4(rec->ur_id2), rec->ur_namelen - 1,
1001                        rec->ur_name, rec->ur_mode);
1002
1003                 LASSERT(id_ino(rec->ur_id2));
1004
1005                 rc = mds_open_by_id(req, rec->ur_id2, body,
1006                                     rec->ur_flags, rec, rep);
1007                 if (rc != -ENOENT) {
1008                         mds_body_do_reverse_map(med, body);
1009                         RETURN(rc);
1010                 }
1011
1012                 /* We didn't find the correct inode on disk either, so we
1013                  * need to re-create it via a regular replay. */
1014                 LASSERT(rec->ur_flags & MDS_OPEN_CREAT);
1015         } else {
1016                 LASSERT(!id_ino(rec->ur_id2));
1017         }
1018
1019         LASSERT(offset == 3); /* If we got here, we must be called via intent */
1020
1021         if (OBD_FAIL_CHECK(OBD_FAIL_MDS_OPEN_PACK)) {
1022                 CERROR("test case OBD_FAIL_MDS_OPEN_PACK\n");
1023                 RETURN(-ENOMEM);
1024         }
1025
1026         acc_mode = accmode(rec->ur_flags);
1027
1028         /* Step 1: Find and lock the parent */
1029         if (rec->ur_flags & MDS_OPEN_CREAT) {
1030                 /* XXX Well, in fact we only need this lock mode change if
1031                    in addition to O_CREAT, the file does not exist.
1032                    But we do not know if it exists or not yet */
1033                 parent_mode = LCK_PW;
1034         }
1035
1036         if (rec->ur_namelen == 1) {
1037                 /* client (LMV) wants to open the file by id */
1038                 CDEBUG(D_OTHER, "OPEN by id "DLID4"\n", OLID4(rec->ur_id1));
1039                 dchild = mds_id2dentry(obd, rec->ur_id1, NULL);
1040                 if (IS_ERR(dchild)) {
1041                         rc = PTR_ERR(dparent);
1042                         CERROR("child lookup by an id error %d\n", rc);
1043                         GOTO(cleanup, rc);
1044                 }
1045                 goto got_child;
1046         }
1047
1048 restart:
1049         dparent = mds_id2locked_dentry(obd, rec->ur_id1, NULL, parent_mode,
1050                                        parent_lockh, &update_mode, rec->ur_name,
1051                                        rec->ur_namelen - 1, MDS_INODELOCK_UPDATE);
1052         if (IS_ERR(dparent)) {
1053                 rc = PTR_ERR(dparent);
1054                 if (rc != -ENOENT) {
1055                         CERROR("parent lookup for "DLID4" failed, error %d\n",
1056                                OLID4(rec->ur_id1), rc);
1057                 } else {
1058                         /* Just cannot find parent - make it look like
1059                            usual negative lookup to avoid extra MDS RPC */
1060                         intent_set_disposition(rep, DISP_LOOKUP_EXECD);
1061                         intent_set_disposition(rep, DISP_LOOKUP_NEG);
1062                 }
1063                 GOTO(cleanup, rc);
1064         }
1065         LASSERT(dparent->d_inode != NULL);
1066
1067         cleanup_phase = 1; /* parent dentry and lock */
1068
1069         /* try to retrieve MEA data for this dir */
1070         rc = mds_md_get_attr(obd, dparent->d_inode, &mea, &mea_size);
1071         if (rc)
1072                 GOTO(cleanup, rc);
1073
1074         if (mea != NULL) {
1075                 /*
1076                  * dir is already splitted, check is requested filename should *
1077                  * live at this MDS or at another one.
1078                  */
1079                 int i;
1080                 i = mea_name2idx(mea, rec->ur_name, rec->ur_namelen - 1);
1081                 if (mea->mea_master != id_group(&mea->mea_ids[i])) {
1082                         CDEBUG(D_OTHER,
1083                                "%s: inapropriate MDS(%d) for %lu/%u:%s."
1084                                " should be %lu(%d)\n", obd->obd_name,
1085                                mea->mea_master, dparent->d_inode->i_ino,
1086                                dparent->d_inode->i_generation, rec->ur_name,
1087                                (unsigned long)id_group(&mea->mea_ids[i]), i);
1088                         GOTO(cleanup, rc = -ERESTART);
1089                 }
1090         }
1091
1092         /* Step 2: Lookup the child */
1093         dchild = ll_lookup_one_len(rec->ur_name, dparent, rec->ur_namelen - 1);
1094         if (IS_ERR(dchild)) {
1095                 rc = PTR_ERR(dchild);
1096                 dchild = NULL; /* don't confuse mds_finish_transno() below */
1097                 GOTO(cleanup, rc);
1098         }
1099
1100 got_child:
1101         cleanup_phase = 2; /* child dentry */
1102
1103         if (dchild->d_flags & DCACHE_CROSS_REF) {
1104                 CDEBUG(D_OTHER, "cross reference: "DLID4"\n", OLID4(rec->ur_id1));
1105                 LASSERT(rec->ur_namelen > 1);
1106
1107                 /* we're gonna acquire LOOKUP lock on the child,
1108                  * but we have already locked parent and our order
1109                  * may conflict with enqueue_order_locks(). so,
1110                  * drop parent lock and acquire both the locks in
1111                  * common order. bug 6190 */
1112 #ifdef S_PDIROPS
1113                 if (parent_lockh[1].cookie != 0)
1114                         ldlm_lock_decref(parent_lockh + 1, update_mode);
1115 #endif
1116                 ldlm_lock_decref(parent_lockh, parent_mode);
1117                 l_dput(dchild);
1118                 l_dput(dparent);
1119                 cleanup_phase = 0;
1120
1121                 rc = mds_get_parent_child_locked(obd, mds, rec->ur_id1,
1122                                                  parent_lockh, &dparent,
1123                                                  LCK_PR, MDS_INODELOCK_UPDATE,
1124                                                  &update_mode, rec->ur_name,
1125                                                  rec->ur_namelen, child_lockh,
1126                                                  &dchild, LCK_PR,
1127                                                  MDS_INODELOCK_LOOKUP);
1128
1129                 if (rc)
1130                         GOTO(cleanup, rc);
1131
1132 #ifdef S_PDIROPS
1133                 if (parent_lockh[1].cookie != 0)
1134                         ldlm_lock_decref(parent_lockh + 1, update_mode);
1135 #endif
1136                 ldlm_lock_decref(parent_lockh, LCK_PR);
1137
1138                 if (dchild->d_inode || !(dchild->d_flags & DCACHE_CROSS_REF)) {
1139                         CDEBUG(D_OTHER, "race: name changed (%p)\n",
1140                                dchild->d_inode);
1141                         if (dchild->d_inode)
1142                                 ldlm_lock_decref(child_lockh, LCK_PR);
1143                         l_dput(dchild);
1144                         l_dput(dparent);
1145                         GOTO(restart, rc);
1146                 }
1147
1148                 mds_pack_dentry2body(obd, body, dchild, 1);
1149                 intent_set_disposition(rep, DISP_LOOKUP_POS);
1150                 intent_set_disposition(rep, DISP_LOOKUP_EXECD);
1151
1152                 if (mea)
1153                         OBD_FREE(mea, mea_size);
1154                 l_dput(dchild);
1155                 l_dput(dparent);
1156                 RETURN(rc);
1157         }
1158
1159         intent_set_disposition(rep, DISP_LOOKUP_EXECD);
1160
1161         if (dchild->d_inode)
1162                 intent_set_disposition(rep, DISP_LOOKUP_POS);
1163         else
1164                 intent_set_disposition(rep, DISP_LOOKUP_NEG);
1165
1166         /* Step 3: If the child was negative, and we're supposed to, create it.*/
1167         if (dchild->d_inode == NULL) {
1168                 unsigned long ino;
1169                 struct iattr iattr;
1170                 struct inode *inode;
1171
1172                 ino = (unsigned long)id_ino(rec->ur_id2);
1173
1174                 rc = mds_try_to_split_dir(obd, dparent, &mea, 0,
1175                                           update_mode);
1176
1177                 CDEBUG(D_OTHER, "%s: splitted %lu/%u - %d\n",
1178                        obd->obd_name, dparent->d_inode->i_ino,
1179                        dparent->d_inode->i_generation, rc);
1180
1181                 if (rc > 0) {
1182                         /* dir got splitted */
1183                         GOTO(cleanup, rc = -ERESTART);
1184                 } else if (rc < 0) {
1185                         /* error happened during spitting */
1186                         GOTO(cleanup, rc);
1187                 }
1188
1189                 if (!(rec->ur_flags & MDS_OPEN_CREAT)) {
1190                         /*
1191                          * dentry is negative and we weren't supposed to create
1192                          * object, get out of here.
1193                          */
1194                         GOTO(cleanup, rc = -ENOENT);
1195                 }
1196
1197                 intent_set_disposition(rep, DISP_OPEN_CREATE);
1198                 handle = fsfilt_start(obd, dparent->d_inode, FSFILT_OP_CREATE,
1199                                       NULL);
1200                 if (IS_ERR(handle)) {
1201                         rc = PTR_ERR(handle);
1202                         handle = NULL;
1203                         GOTO(cleanup, rc);
1204                 }
1205                 dchild->d_fsdata = (void *) &dp;
1206                 dp.p_ptr = req;
1207                 dp.p_inum = ino;
1208
1209                 rc = ll_vfs_create(dparent->d_inode, dchild, rec->ur_mode, NULL);
1210                 if (dchild->d_fsdata == (void *)(unsigned long)ino)
1211                         dchild->d_fsdata = NULL;
1212
1213                 if (rc) {
1214                         CDEBUG(D_INODE, "error during create: %d\n", rc);
1215                         GOTO(cleanup, rc);
1216                 }
1217                 inode = dchild->d_inode;
1218                 if (ino) {
1219                         LASSERT(ino == inode->i_ino);
1220
1221                         /* written as part of setattr */
1222                         inode->i_generation = id_gen(rec->ur_id2);
1223                         CDEBUG(D_HA, "recreated ino %lu with gen %u\n",
1224                                inode->i_ino, inode->i_generation);
1225                 }
1226
1227                 created = 1;
1228                 LTIME_S(iattr.ia_atime) = rec->ur_time;
1229                 LTIME_S(iattr.ia_ctime) = rec->ur_time;
1230                 LTIME_S(iattr.ia_mtime) = rec->ur_time;
1231
1232                 iattr.ia_uid = rec->ur_fsuid;
1233                 if (dparent->d_inode->i_mode & S_ISGID)
1234                         iattr.ia_gid = dparent->d_inode->i_gid;
1235                 else
1236                         iattr.ia_gid = rec->ur_fsgid;
1237
1238                 iattr.ia_valid = ATTR_UID | ATTR_GID | ATTR_ATIME |
1239                         ATTR_MTIME | ATTR_CTIME;
1240
1241                 rc = fsfilt_setattr(obd, dchild, handle, &iattr, 0);
1242                 if (rc)
1243                         CERROR("error on child setattr: rc = %d\n", rc);
1244
1245                 iattr.ia_valid = ATTR_MTIME | ATTR_CTIME;
1246
1247                 rc = fsfilt_setattr(obd, dparent, handle, &iattr, 0);
1248                 if (rc)
1249                         CERROR("error on parent setattr: rc = %d\n", rc);
1250                 else {
1251                         MD_COUNTER_INCREMENT(obd, create);
1252                 }
1253
1254                 if (ino) {
1255                         rc = mds_update_inode_sid(obd, dchild->d_inode,
1256                                                   handle, rec->ur_id2);
1257                         if (rc) {
1258                                 CERROR("mds_update_inode_sid() failed, "
1259                                        "rc = %d\n", rc);
1260                         }
1261                         id_assign_fid(&body->id1, rec->ur_id2);
1262
1263                         /*
1264                          * make sure, that fid is up-to-date.
1265                          */
1266                         mds_set_last_fid(obd, id_fid(rec->ur_id2));
1267                 } else {
1268                         rc = mds_alloc_inode_sid(obd, dchild->d_inode,
1269                                                  handle, &body->id1);
1270                         if (rc) {
1271                                 CERROR("mds_alloc_inode_sid() failed, "
1272                                        "rc = %d\n", rc);
1273                         }
1274                 }
1275
1276                 if (!(rec->ur_flags & O_EXCL)) { /* bug 3313 */
1277                         rc = fsfilt_commit(obd, dchild->d_inode->i_sb,
1278                                            dchild->d_inode, handle,
1279                                            req->rq_export->exp_sync);
1280                         handle = NULL;
1281                 }
1282
1283                 acc_mode = 0;           /* Don't check for permissions */
1284         }
1285         mds_pack_inode2body(obd, body, dchild->d_inode, 1);
1286
1287         LASSERTF(!mds_inode_is_orphan(dchild->d_inode),
1288                  "dchild %.*s (%p) inode %p\n", dchild->d_name.len,
1289                  dchild->d_name.name, dchild, dchild->d_inode);
1290
1291         if (S_ISREG(dchild->d_inode->i_mode)) {
1292                 /* Check permissions etc */
1293                 rc = ll_permission(dchild->d_inode, acc_mode, NULL);
1294                 if (rc != 0)
1295                         GOTO(cleanup, rc);
1296
1297                 /* Can't write to a read-only file */
1298                 if (IS_RDONLY(dchild->d_inode) && (acc_mode & MAY_WRITE) != 0)
1299                         GOTO(cleanup, rc = -EPERM);
1300
1301                 /* An append-only file must be opened in append mode for
1302                  * writing */
1303                 if (IS_APPEND(dchild->d_inode) && (acc_mode & MAY_WRITE) != 0 &&
1304                     ((rec->ur_flags & MDS_OPEN_APPEND) == 0 ||
1305                      (rec->ur_flags & MDS_OPEN_TRUNC) != 0))
1306                         GOTO(cleanup, rc = -EPERM);
1307         }
1308
1309         if (!created && (rec->ur_flags & MDS_OPEN_CREAT) &&
1310             (rec->ur_flags & MDS_OPEN_EXCL)) {
1311                 /* File already exists, we didn't just create it, and we
1312                  * were passed O_EXCL; err-or. */
1313                 GOTO(cleanup, rc = -EEXIST); // returns a lock to the client
1314         }
1315
1316         if (S_ISDIR(dchild->d_inode->i_mode)) {
1317                 if (rec->ur_flags & MDS_OPEN_CREAT ||
1318                     rec->ur_flags & FMODE_WRITE) {
1319                         /* we are trying to create or write a exist dir */
1320                         GOTO(cleanup, rc = -EISDIR);
1321                 }
1322                 if (ll_permission(dchild->d_inode, acc_mode, NULL))
1323                         GOTO(cleanup, rc = -EACCES);
1324
1325                 /*
1326                  * here was checking for possible GNS mount points to skip their
1327                  * open. I removed it as its detection based only on SUID bit is
1328                  * not reliable. Opening such a dirs should not cause any
1329                  * problems, at least tests show that. --umka
1330                  */
1331         }
1332
1333         /* if we are following a symlink, don't open */
1334         if (S_ISLNK(dchild->d_inode->i_mode))
1335                 GOTO(cleanup_no_trans, rc = 0);
1336
1337         if ((rec->ur_flags & MDS_OPEN_DIRECTORY) &&
1338             !S_ISDIR(dchild->d_inode->i_mode))
1339                 GOTO(cleanup, rc = -ENOTDIR);
1340
1341         if (OBD_FAIL_CHECK(OBD_FAIL_MDS_OPEN_CREATE)) {
1342                 obd_fail_loc = OBD_FAIL_LDLM_REPLY | OBD_FAIL_ONCE;
1343                 GOTO(cleanup, rc = -EAGAIN);
1344         }
1345
1346 #warning "disable opencache lock for CMD2"
1347 #if 0
1348         /* Obtain OPEN lock as well */
1349         policy.l_inodebits.bits |= MDS_INODELOCK_OPEN;
1350
1351         /* We cannot use acc_mode here, because it is zeroed in case of
1352            creating a file, so we get wrong lockmode */
1353         if (accmode(rec->ur_flags) & MAY_WRITE)
1354                 child_mode = LCK_CW;
1355         else if (accmode(rec->ur_flags) & MAY_EXEC)
1356                 child_mode = LCK_PR;
1357         else
1358                 child_mode = LCK_CR;
1359
1360         if (!(lustre_msg_get_flags(req->rq_reqmsg) & MSG_REPLAY)) {
1361                 /* In case of replay we do not get a lock assuming that the
1362                    caller has it already */
1363                 child_res_id.name[0] = id_fid(&body->id1);
1364                 child_res_id.name[1] = id_group(&body->id1);
1365
1366                 rc = ldlm_cli_enqueue(NULL, NULL, obd->obd_namespace,
1367                                       child_res_id, LDLM_IBITS, &policy,
1368                                       child_mode, &lock_flags,
1369                                       mds_blocking_ast, ldlm_completion_ast,
1370                                       NULL, NULL, NULL, 0, NULL, child_lockh);
1371                 if (rc != ELDLM_OK)
1372                         GOTO(cleanup, rc);
1373
1374                 cleanup_phase = 3;
1375         }
1376 #endif
1377
1378         /* Step 5: mds_open it */
1379         rc = mds_finish_open(req, dchild, body, rec->ur_flags, &handle,
1380                              rec, rep);
1381
1382         EXIT;
1383 cleanup:
1384         rc = mds_finish_transno(mds, dchild ? dchild->d_inode : NULL, handle,
1385                                 req, rc, rep ? rep->lock_policy_res1 : 0);
1386
1387 cleanup_no_trans:
1388         switch (cleanup_phase) {
1389         case 3:
1390                 if (rc) {
1391                         ldlm_lock_decref(child_lockh, child_mode);
1392                         child_lockh->cookie = 0;
1393                 }
1394         case 2:
1395                 if (rc && created) {
1396                         int err = vfs_unlink(dparent->d_inode, dchild);
1397                         if (err) {
1398                                 CERROR("unlink(%.*s) in error path: %d\n",
1399                                        dchild->d_name.len, dchild->d_name.name,
1400                                        err);
1401                         }
1402                 } else if (created) {
1403                         mds_lock_new_child(obd, dchild->d_inode, NULL);
1404                 }
1405                 l_dput(dchild);
1406         case 1:
1407                 if (dparent == NULL)
1408                         break;
1409
1410                 l_dput(dparent);
1411 #ifdef S_PDIROPS
1412                 if (parent_lockh[1].cookie != 0)
1413                         ldlm_lock_decref(parent_lockh + 1, update_mode);
1414 #endif
1415                 if (rc)
1416                         ldlm_lock_decref(parent_lockh, parent_mode);
1417                 else
1418                         ptlrpc_save_lock (req, parent_lockh, parent_mode);
1419         }
1420         if (mea)
1421                 OBD_FREE(mea, mea_size);
1422         if (rc == 0)
1423                 atomic_inc(&mds->mds_open_count);
1424
1425         mds_body_do_reverse_map(med, body);
1426
1427         /*
1428          * If we have not taken the "open" lock, we may not return 0 here,
1429          * because caller expects 0 to mean "lock is taken", and it needs
1430          * nonzero return here for caller to return EDLM_LOCK_ABORTED to
1431          * client. Later caller should rewrite the return value back to zero
1432          * if it to be used any further.
1433          */
1434         if ((cleanup_phase != 3) && !rc)
1435                 rc = ENOLCK;
1436
1437         RETURN(rc);
1438 }
1439
1440 /* Close a "file descriptor" and possibly unlink an orphan from the
1441  * PENDING directory.  Caller must hold child->i_sem, this drops it.
1442  *
1443  * If we are being called from mds_disconnect() because the client has
1444  * disappeared, then req == NULL and we do not update last_rcvd because
1445  * there is nothing that could be recovered by the client at this stage
1446  * (it will not even _have_ an entry in last_rcvd anymore).
1447  *
1448  * Returns EAGAIN if the client needs to get more data and re-close. */
1449 int mds_mfd_close(struct ptlrpc_request *req, int offset,
1450                   struct obd_device *obd, struct mds_file_data *mfd,
1451                   int unlink_orphan)
1452 {
1453         struct inode *inode = mfd->mfd_dentry->d_inode;
1454         char idname[LL_ID_NAMELEN];
1455         int last_orphan, idlen, rc = 0, cleanup_phase = 0;
1456         struct dentry *pending_child = NULL;
1457         struct mds_obd *mds = &obd->u.mds;
1458         struct inode *pending_dir = mds->mds_pending_dir->d_inode;
1459         void *handle = NULL;
1460         struct mds_body *request_body = NULL, *reply_body = NULL;
1461         struct dentry_params dp;
1462         struct iattr iattr = { 0 };
1463         struct llog_create_locks *lcl = NULL;
1464         ENTRY;
1465
1466         if (req && req->rq_reqmsg != NULL)
1467                 request_body = lustre_msg_buf(req->rq_reqmsg, offset,
1468                                               sizeof(*request_body));
1469         if (req && req->rq_repmsg != NULL)
1470                 reply_body = lustre_msg_buf(req->rq_repmsg, 0,
1471                                             sizeof(*reply_body));
1472
1473         idlen = ll_id2str(idname, inode->i_ino, inode->i_generation);
1474         CDEBUG(D_INODE, "inode %p ino %s nlink %d orphan %d\n", inode,
1475                idname, inode->i_nlink, mds_orphan_open_count(inode));
1476
1477         last_orphan = mds_orphan_open_dec_test(inode) &&
1478                 mds_inode_is_orphan(inode);
1479         UP_WRITE_I_ALLOC_SEM(inode);
1480
1481         /* this is half of the actual "close" */
1482         if (mfd->mfd_mode & FMODE_WRITE) {
1483                 rc = mds_put_write_access(mds, inode, request_body,
1484                                           last_orphan && unlink_orphan);
1485         } else if (mfd->mfd_mode & FMODE_EXEC) {
1486                 mds_allow_write_access(inode);
1487         }
1488
1489         if (last_orphan && unlink_orphan) {
1490                 struct lov_mds_md *lmm = NULL;
1491                 int stripe_count = 0;
1492                 LASSERT(rc == 0); /* mds_put_write_access must have succeeded */
1493
1494                 CDEBUG(D_HA, "destroying orphan object %s\n", idname);
1495
1496                 if ((S_ISREG(inode->i_mode) && inode->i_nlink != 1) ||
1497                     (S_ISDIR(inode->i_mode) && inode->i_nlink != 2))
1498                         CERROR("found \"orphan\" %s %s with link count %d\n",
1499                                S_ISREG(inode->i_mode) ? "file" : "dir",
1500                                idname, inode->i_nlink);
1501                 /*
1502                  * sadly, there is no easy way to save pending_child from
1503                  * mds_reint_unlink() into mfd, so we need to re-lookup, but
1504                  * normally it will still be in the dcache.
1505                  */
1506                 down(&pending_dir->i_sem);
1507                 cleanup_phase = 1; /* up(i_sem) when finished */
1508                 pending_child = lookup_one_len(idname, mds->mds_pending_dir,
1509                                                idlen);
1510                 if (IS_ERR(pending_child))
1511                         GOTO(cleanup, rc = PTR_ERR(pending_child));
1512                 if (pending_child->d_inode == NULL) {
1513                         CERROR("orphan %s has been removed\n", idname);
1514                         GOTO(cleanup, rc = 0);
1515                 }
1516
1517                 cleanup_phase = 2; /* dput(pending_child) when finished */
1518                 if (S_ISDIR(pending_child->d_inode->i_mode)) {
1519                         rc = vfs_rmdir(pending_dir, pending_child);
1520                         if (rc)
1521                                 CERROR("error unlinking orphan dir %s: rc %d\n",
1522                                        idname, rc);
1523                         goto out;
1524                 }
1525
1526                 if (req != NULL && req->rq_repmsg != NULL) {
1527                         lmm = lustre_msg_buf(req->rq_repmsg, 1, 0);
1528                         stripe_count = le32_to_cpu(lmm->lmm_stripe_count);
1529                 }
1530
1531                 handle = fsfilt_start_log(obd, pending_dir, FSFILT_OP_UNLINK,
1532                                           NULL, stripe_count);
1533                 if (IS_ERR(handle)) {
1534                         rc = PTR_ERR(handle);
1535                         handle = NULL;
1536                         GOTO(cleanup, rc);
1537                 }
1538
1539                 pending_child->d_fsdata = (void *) &dp;
1540                 dp.p_inum = 0;
1541                 dp.p_ptr = req;
1542                 rc = vfs_unlink(pending_dir, pending_child);
1543                 if (rc)
1544                         CERROR("error unlinking orphan %s: rc %d\n",
1545                                idname, rc);
1546
1547                 if (req != NULL && req->rq_repmsg != NULL &&
1548                     (reply_body->valid & OBD_MD_FLEASIZE) &&
1549                     mds_log_op_unlink(obd, pending_child->d_inode,
1550                                       lmm, req->rq_repmsg->buflens[1],
1551                                       lustre_msg_buf(req->rq_repmsg, 2, 0),
1552                                       req->rq_repmsg->buflens[2], &lcl) > 0) {
1553                         reply_body->valid |= OBD_MD_FLCOOKIE;
1554                 }
1555
1556                 rc = mds_destroy_object(obd, inode, 1);
1557                 if (rc) {
1558                         CERROR("cannot destroy OSS object on close, err %d\n",
1559                                rc);
1560                         rc = 0;
1561                 }
1562
1563                 goto out; /* Don't bother updating attrs on unlinked inode */
1564         }
1565
1566 #if 0
1567         if (request_body != NULL && mfd->mfd_mode & FMODE_WRITE && rc == 0) {
1568                 /* Update the on-disk attributes if this was the last write
1569                  * close, and all information was provided (i.e., rc == 0)
1570                  *
1571                  * XXX this should probably be abstracted with mds_reint_setattr
1572                  */
1573
1574                 if (request_body->valid & OBD_MD_FLMTIME &&
1575                     LTIME_S(request_body->mtime) > LTIME_S(inode->i_mtime)) {
1576                         LTIME_S(iattr.ia_mtime) = LTIME_S(request_body->mtime);
1577                         iattr.ia_valid |= ATTR_MTIME;
1578                 }
1579                 if (request_body->valid & OBD_MD_FLCTIME &&
1580                     LTIME_S(request_body->ctime) > LTIME_S(inode->i_ctime)) {
1581                         LTIME_S(iattr.ia_ctime) = LTIME_S(request_body->ctime);
1582                         iattr.ia_valid |= ATTR_CTIME;
1583                 }
1584
1585                 /* XXX can't set block count with fsfilt_setattr (!) */
1586                 if (request_body->valid & OBD_MD_FLSIZE) {
1587                         iattr.ia_valid |= ATTR_SIZE;
1588                         iattr.ia_size = request_body->size;
1589                 }
1590                 /* if (request_body->valid & OBD_MD_FLBLOCKS) {
1591                         iattr.ia_valid |= ATTR_BLOCKS;
1592                         iattr.ia_blocks = request_body->blocks
1593                 } */
1594
1595         }
1596 #endif
1597         if (request_body != NULL && request_body->valid & OBD_MD_FLATIME) {
1598                 /* Only start a transaction to write out only the atime if
1599                  * it is more out-of-date than the specified limit.  If we
1600                  * are already going to write out the atime then do it anyway.
1601                  * */
1602                 if ((request_body->atime >
1603                      LTIME_S(inode->i_atime) + MAX_ATIME_DIFF) ||
1604                     (iattr.ia_valid != 0 &&
1605                      request_body->atime > LTIME_S(inode->i_atime))) {
1606                         LTIME_S(iattr.ia_atime) = request_body->atime;
1607                         iattr.ia_valid |= ATTR_ATIME;
1608                 }
1609         }
1610
1611         if (iattr.ia_valid != 0) {
1612                 handle = fsfilt_start(obd, inode, FSFILT_OP_SETATTR, NULL);
1613                 if (IS_ERR(handle))
1614                         GOTO(cleanup, rc = PTR_ERR(handle));
1615                 rc = fsfilt_setattr(obd, mfd->mfd_dentry, handle, &iattr, 0);
1616                 if (rc)
1617                         CERROR("error in setattr(%s): rc %d\n", idname, rc);
1618         }
1619 out:
1620         /* If other clients have this file open for write, rc will be > 0 */
1621         if (rc > 0)
1622                 rc = 0;
1623         l_dput(mfd->mfd_dentry);
1624         mds_mfd_destroy(mfd);
1625
1626  cleanup:
1627         atomic_dec(&mds->mds_open_count);
1628         if (req != NULL && reply_body != NULL) {
1629                 rc = mds_finish_transno(mds, pending_dir, handle, req, rc, 0);
1630         } else if (handle) {
1631                 int err, force_sync = 0;
1632
1633                 if (req && req->rq_export)
1634                         force_sync = req->rq_export->exp_sync;
1635
1636                 err = fsfilt_commit(obd, mds->mds_sb, pending_dir, handle,
1637                                     force_sync);
1638                 if (err) {
1639                         CERROR("error committing close: %d\n", err);
1640                         if (!rc)
1641                                 rc = err;
1642                 }
1643         }
1644
1645         switch (cleanup_phase) {
1646         case 2:
1647                 if (lcl != NULL)
1648                         ptlrpc_save_llog_lock(req, lcl);
1649                 dput(pending_child);
1650         case 1:
1651                 up(&pending_dir->i_sem);
1652         }
1653         RETURN(rc);
1654 }
1655
1656 int mds_close(struct ptlrpc_request *req, int offset)
1657 {
1658         struct mds_export_data *med = &req->rq_export->exp_mds_data;
1659         struct obd_device *obd = req->rq_export->exp_obd;
1660         struct mds_body *body;
1661         struct mds_file_data *mfd;
1662         struct lvfs_run_ctxt saved;
1663         struct inode *inode;
1664         int rc, repsize[3] = {sizeof(struct mds_body),
1665                               obd->u.mds.mds_max_mdsize,
1666                               obd->u.mds.mds_max_cookiesize};
1667         ENTRY;
1668         MD_COUNTER_INCREMENT(obd, close);
1669
1670         rc = lustre_pack_reply(req, 3, repsize, NULL);
1671         if (rc) {
1672                 CERROR("lustre_pack_reply: rc = %d\n", rc);
1673                 req->rq_status = rc;
1674         } else {
1675                 MDS_CHECK_RESENT(req, mds_reconstruct_generic(req));
1676         }
1677
1678         if (lustre_msg_get_flags(req->rq_reqmsg) & MSG_REPLAY) {
1679                 DEBUG_REQ(D_HA, req, "close replay");
1680                 memcpy(lustre_msg_buf(req->rq_repmsg, 2, 0),
1681                        lustre_msg_buf(req->rq_reqmsg, offset + 1, 0),
1682                        req->rq_repmsg->buflens[2]);
1683         }
1684
1685         body = lustre_swab_reqbuf(req, offset, sizeof(*body),
1686                                   lustre_swab_mds_body);
1687         if (body == NULL) {
1688                 CERROR("Can't unpack body\n");
1689                 req->rq_status = -EFAULT;
1690                 RETURN(-EFAULT);
1691         }
1692
1693         if (body->flags & MDS_BFLAG_UNCOMMITTED_WRITES)
1694                 /* do some stuff */ ;
1695
1696         mfd = mds_handle2mfd(&body->handle);
1697         if (mfd == NULL) {
1698                 DEBUG_REQ(D_ERROR, req, "no handle for file close ino "LPD64
1699                           ": cookie "LPX64, id_ino(&body->id1), body->handle.cookie);
1700                 req->rq_status = -ESTALE;
1701                 RETURN(-ESTALE);
1702         }
1703
1704         inode = mfd->mfd_dentry->d_inode;
1705         /* child i_alloc_sem protects orphan_dec_test && is_orphan race */
1706         DOWN_WRITE_I_ALLOC_SEM(inode); /* mds_mfd_close drops this */
1707         if (mds_inode_is_orphan(inode) && mds_orphan_open_count(inode) == 1) {
1708                 struct mds_body *rep_body;
1709
1710                 rep_body = lustre_msg_buf(req->rq_repmsg, 0,
1711                                           sizeof (*rep_body));
1712                 LASSERT(rep_body != NULL);
1713
1714                 mds_pack_inode2body(obd, rep_body, inode,
1715                                     (body->valid & OBD_MD_FID) ? 1 : 0);
1716
1717                 mds_pack_md(obd, req->rq_repmsg, 1, rep_body,
1718                             inode, MDS_PACK_MD_LOCK, 0);
1719         }
1720         spin_lock(&med->med_open_lock);
1721         list_del(&mfd->mfd_list);
1722         spin_unlock(&med->med_open_lock);
1723
1724         push_ctxt(&saved, &obd->obd_lvfs_ctxt, NULL);
1725         req->rq_status = mds_mfd_close(req, offset, obd, mfd, 1);
1726         pop_ctxt(&saved, &obd->obd_lvfs_ctxt, NULL);
1727
1728         if (OBD_FAIL_CHECK(OBD_FAIL_MDS_CLOSE_PACK)) {
1729                 CERROR("test case OBD_FAIL_MDS_CLOSE_PACK\n");
1730                 req->rq_status = -ENOMEM;
1731                 mds_mfd_put(mfd);
1732                 RETURN(-ENOMEM);
1733         }
1734
1735         mds_mfd_put(mfd);
1736         RETURN(0);
1737 }
1738
1739 int mds_done_writing(struct ptlrpc_request *req, int offset)
1740 {
1741         struct mds_body *body;
1742         int rc, size = sizeof(struct mds_body);
1743         ENTRY;
1744
1745         MDS_CHECK_RESENT(req, mds_reconstruct_generic(req));
1746
1747         body = lustre_swab_reqbuf(req, offset, sizeof(*body),
1748                                   lustre_swab_mds_body);
1749         if (body == NULL) {
1750                 CERROR("Can't unpack body\n");
1751                 req->rq_status = -EFAULT;
1752                 RETURN(-EFAULT);
1753         }
1754
1755         rc = lustre_pack_reply(req, 1, &size, NULL);
1756         if (rc) {
1757                 CERROR("lustre_pack_reply: rc = %d\n", rc);
1758                 req->rq_status = rc;
1759         }
1760
1761         RETURN(0);
1762 }