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  * GPL HEADER START
   5  *
   6  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   7  *
   8  * This program is free software; you can redistribute it and/or modify
   9  * it under the terms of the GNU General Public License version 2 only,
  10  * as published by the Free Software Foundation.
  11  *
  12  * This program is distributed in the hope that it will be useful, but
  13  * WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  15  * General Public License version 2 for more details (a copy is included
  16  * in the LICENSE file that accompanied this code).
  17  *
  18  * You should have received a copy of the GNU General Public License
  19  * version 2 along with this program; If not, see
  20  * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
  21  *
  22  * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
  23  * CA 95054 USA or visit www.sun.com if you need additional information or
  24  * have any questions.
  25  *
  26  * GPL HEADER END
  27  */
  28 /*
  29  * Copyright (c) 2003, 2010, Oracle and/or its affiliates. All rights reserved.
  30  * Use is subject to license terms.
  31  */
  32 /*
  33  * This file is part of Lustre, http://www.lustre.org/
  34  * Lustre is a trademark of Sun Microsystems, Inc.
  35  *
  36  * lustre/mds/mds_open.c
  37  *
  38  * Author: Peter Braam <braam@clusterfs.com>
  39  * Author: Andreas Dilger <adilger@clusterfs.com>
  40  * Author: Phil Schwan <phil@clusterfs.com>
  41  * Author: Mike Shaver <shaver@clusterfs.com>
  42  */
  43
  44 #ifndef EXPORT_SYMTAB
  45 # define EXPORT_SYMTAB
  46 #endif
  47 #define DEBUG_SUBSYSTEM S_MDS
  48
  49 #include <linux/version.h>
  50 #include <linux/module.h>
  51 #include <linux/init.h>
  52 #include <linux/version.h>
  53 #include <linux/buffer_head.h>
  54 #include <linux/workqueue.h>
  55
  56 #include <obd_class.h>
  57 #include <obd_lov.h>
  58 #include <lustre_fsfilt.h>
  59 #include <lprocfs_status.h>
  60
  61 #include "mds_internal.h"
  62
  63 /* Exported function from this file are:
  64  *
  65  * mds_open - called by the intent handler
  66  * mds_close - an rpc handling function
  67  * mds_pin - an rpc handling function - which will go away
  68  * mds_mfd_close - for force closing files when a client dies
  69  */
  70
  71 /*
  72  * MDS file data handling: file data holds a handle for a file opened
  73  * by a client.
  74  */
  75
  76 static void mds_mfd_addref(void *mfdp)
  77 {
  78         struct mds_file_data *mfd = mfdp;
  79
  80         atomic_inc(&mfd->mfd_refcount);
  81         CDEBUG(D_INFO, "GETting mfd %p : new refcount %d\n", mfd,
  82                atomic_read(&mfd->mfd_refcount));
  83 }
  84
  85 /* Create a new mds_file_data struct.
  86  * One reference for handle+med_open_head list and dropped by mds_mfd_unlink(),
  87  * one reference for the caller of this function. */
  88 struct mds_file_data *mds_mfd_new(void)
  89 {
  90         struct mds_file_data *mfd;
  91
  92         OBD_ALLOC(mfd, sizeof *mfd);
  93         if (mfd == NULL) {
  94                 CERROR("mds: out of memory\n");
  95                 return NULL;
  96         }
  97
  98         atomic_set(&mfd->mfd_refcount, 2);
  99
 100         INIT_LIST_HEAD(&mfd->mfd_handle.h_link);
 101         INIT_LIST_HEAD(&mfd->mfd_list);
 102         class_handle_hash(&mfd->mfd_handle, mds_mfd_addref);
 103
 104         return mfd;
 105 }
 106
 107 /* Get a new reference on the mfd pointed to by handle, if handle is still
 108  * valid.  Caller must drop reference with mds_mfd_put(). */
 109 static struct mds_file_data *mds_handle2mfd(struct lustre_handle *handle)
 110 {
 111         ENTRY;
 112         LASSERT(handle != NULL);
 113         RETURN(class_handle2object(handle->cookie));
 114 }
 115
 116 /* Drop mfd reference, freeing struct if this is the last one. */
 117 static void mds_mfd_put(struct mds_file_data *mfd)
 118 {
 119         CDEBUG(D_INFO, "PUTting mfd %p : new refcount %d\n", mfd,
 120                atomic_read(&mfd->mfd_refcount) - 1);
 121         LASSERT(atomic_read(&mfd->mfd_refcount) > 0 &&
 122                 atomic_read(&mfd->mfd_refcount) < 0x5a5a);
 123         if (atomic_dec_and_test(&mfd->mfd_refcount)) {
 124                 OBD_FREE_RCU(mfd, sizeof *mfd, &mfd->mfd_handle);
 125         }
 126 }
 127
 128 /* Remove the mfd handle so that it cannot be found by open/close again.
 129  * Caller must hold med_open_lock for mfd_list manipulation. */
 130 void mds_mfd_unlink(struct mds_file_data *mfd, int decref)
 131 {
 132         class_handle_unhash(&mfd->mfd_handle);
 133         list_del_init(&mfd->mfd_list);
 134         if (decref)
 135                 mds_mfd_put(mfd);
 136 }
 137
 138 /* Caller must hold mds->mds_epoch_sem */
 139 static int mds_alloc_filterdata(struct inode *inode)
 140 {
 141         LASSERT(INODE_PRIVATE_DATA(inode) == NULL);
 142         OBD_ALLOC(INODE_PRIVATE_DATA(inode), sizeof(struct mds_filter_data));
 143         if (INODE_PRIVATE_DATA(inode) == NULL)
 144                 return -ENOMEM;
 145         LASSERT(igrab(inode) == inode);
 146         return 0;
 147 }
 148
 149 /* Caller must hold mds->mds_epoch_sem */
 150 static void mds_free_filterdata(struct inode *inode)
 151 {
 152         LASSERT(INODE_PRIVATE_DATA(inode) != NULL);
 153         OBD_FREE(INODE_PRIVATE_DATA(inode), sizeof(struct mds_filter_data));
 154         INODE_PRIVATE_DATA(inode) = NULL;
 155         iput(inode);
 156 }
 157
 158 /* Write access to a file: executors cause a negative count,
 159  * writers a positive count.  The semaphore is needed to perform
 160  * a check for the sign and then increment or decrement atomically.
 161  *
 162  * This code is closely tied to the allocation of the d_fsdata and the
 163  * MDS epoch, so we use the same semaphore for the whole lot.
 164  *
 165  * We could use a different semaphore for each file, if it ever shows
 166  * up in a profile, which it won't.
 167  *
 168  * epoch argument is nonzero during recovery */
 169 static int mds_get_write_access(struct mds_obd *mds, struct inode *inode,
 170                                 __u64 epoch)
 171 {
 172         int rc = 0;
 173
 174         down(&mds->mds_epoch_sem);
 175
 176         if (atomic_read(&inode->i_writecount) < 0) {
 177                 up(&mds->mds_epoch_sem);
 178                 RETURN(-ETXTBSY);
 179         }
 180
 181
 182         if (MDS_FILTERDATA(inode) && MDS_FILTERDATA(inode)->io_epoch != 0) {
 183                 CDEBUG(D_INODE, "continuing MDS epoch "LPU64" for ino %lu/%u\n",
 184                        MDS_FILTERDATA(inode)->io_epoch, inode->i_ino,
 185                        inode->i_generation);
 186                 goto out;
 187         }
 188
 189         if (MDS_FILTERDATA(inode) == NULL)
 190                 mds_alloc_filterdata(inode);
 191         if (MDS_FILTERDATA(inode) == NULL) {
 192                 rc = -ENOMEM;
 193                 goto out;
 194         }
 195         if (epoch > mds->mds_io_epoch)
 196                 mds->mds_io_epoch = epoch;
 197         else
 198                 mds->mds_io_epoch++;
 199         MDS_FILTERDATA(inode)->io_epoch = mds->mds_io_epoch;
 200         CDEBUG(D_INODE, "starting MDS epoch "LPU64" for ino %lu/%u\n",
 201                mds->mds_io_epoch, inode->i_ino, inode->i_generation);
 202  out:
 203         if (rc == 0)
 204                 atomic_inc(&inode->i_writecount);
 205         up(&mds->mds_epoch_sem);
 206         return rc;
 207 }
 208
 209 /* Returns EAGAIN if the client needs to get size and/or cookies and close
 210  * again -- which is never true if the file is about to be unlinked.  Otherwise
 211  * returns the number of remaining writers. */
 212 static int mds_put_write_access(struct mds_obd *mds, struct inode *inode,
 213                                 struct mds_body *body, int unlinking)
 214 {
 215         int rc = 0;
 216         ENTRY;
 217
 218         down(&mds->mds_epoch_sem);
 219         atomic_dec(&inode->i_writecount);
 220         rc = atomic_read(&inode->i_writecount);
 221         if (rc > 0)
 222                 GOTO(out, rc);
 223 #if 0
 224         if (!unlinking && !(body->valid & OBD_MD_FLSIZE))
 225                 GOTO(out, rc = EAGAIN);
 226 #endif
 227         mds_free_filterdata(inode);
 228  out:
 229         up(&mds->mds_epoch_sem);
 230         return rc;
 231 }
 232
 233 static int mds_deny_write_access(struct mds_obd *mds, struct inode *inode)
 234 {
 235         ENTRY;
 236         down(&mds->mds_epoch_sem);
 237         if (atomic_read(&inode->i_writecount) > 0) {
 238                 up(&mds->mds_epoch_sem);
 239                 RETURN(-ETXTBSY);
 240         }
 241         atomic_dec(&inode->i_writecount);
 242         up(&mds->mds_epoch_sem);
 243         RETURN(0);
 244 }
 245
 246 static void mds_allow_write_access(struct inode *inode)
 247 {
 248         ENTRY;
 249         atomic_inc(&inode->i_writecount);
 250 }
 251
 252 int mds_query_write_access(struct inode *inode)
 253 {
 254         ENTRY;
 255         RETURN(atomic_read(&inode->i_writecount));
 256 }
 257
 258 /* This replaces the VFS dentry_open, it manages mfd and writecount */
 259 static struct mds_file_data *mds_dentry_open(struct dentry *dentry,
 260                                              struct vfsmount *mnt, int flags,
 261                                              struct ptlrpc_request *req)
 262 {
 263         struct mds_export_data *med = &req->rq_export->exp_mds_data;
 264         struct mds_obd *mds = mds_req2mds(req);
 265         struct mds_file_data *mfd;
 266         struct mds_body *body;
 267         int error;
 268         ENTRY;
 269
 270         mfd = mds_mfd_new();
 271         if (mfd == NULL) {
 272                 CERROR("mds: out of memory\n");
 273                 GOTO(cleanup_dentry, error = -ENOMEM);
 274         }
 275
 276         body = lustre_msg_buf(req->rq_repmsg, DLM_REPLY_REC_OFF, sizeof(*body));
 277
 278         if (flags & FMODE_WRITE) {
 279                 /* FIXME: in recovery, need to pass old epoch here */
 280                 error = mds_get_write_access(mds, dentry->d_inode, 0);
 281                 if (error)
 282                         GOTO(cleanup_mfd, error);
 283                 body->io_epoch = MDS_FILTERDATA(dentry->d_inode)->io_epoch;
 284         } else if (flags & MDS_FMODE_EXEC) {
 285                 error = mds_deny_write_access(mds, dentry->d_inode);
 286                 if (error)
 287                         GOTO(cleanup_mfd, error);
 288         }
 289
 290         dget(dentry);
 291
 292         /* Mark the file as open to handle open-unlink. */
 293         MDS_DOWN_WRITE_ORPHAN_SEM(dentry->d_inode);
 294         mds_orphan_open_inc(dentry->d_inode);
 295         MDS_UP_WRITE_ORPHAN_SEM(dentry->d_inode);
 296
 297         mfd->mfd_mode = flags;
 298         mfd->mfd_dentry = dentry;
 299         mfd->mfd_xid = req->rq_xid;
 300         body->handle.cookie = mfd->mfd_handle.h_cookie;
 301
 302         if (req->rq_export->exp_disconnected) {
 303                 mds_mfd_unlink(mfd, 0);
 304                 MDS_DOWN_WRITE_ORPHAN_SEM(dentry->d_inode);
 305                 mds_mfd_close(NULL, REQ_REC_OFF, req->rq_export->exp_obd,
 306                               mfd, 0, NULL, 0, NULL, 0, NULL);
 307         } else {
 308                 spin_lock(&med->med_open_lock);
 309                 list_add(&mfd->mfd_list, &med->med_open_head);
 310                 spin_unlock(&med->med_open_lock);
 311         }
 312
 313         RETURN(mfd);
 314
 315 cleanup_mfd:
 316         mds_mfd_put(mfd);
 317         mds_mfd_unlink(mfd, 1);
 318 cleanup_dentry:
 319         return ERR_PTR(error);
 320 }
 321
 322 /* Must be called with i_mutex held */
 323 static int mds_create_objects(struct ptlrpc_request *req, int offset,
 324                               struct mds_update_record *rec,
 325                               struct mds_obd *mds, struct obd_device *obd,
 326                               struct dentry *dchild, void **handle,
 327                               struct lov_mds_md **objid)
 328 {
 329         struct inode *inode = dchild->d_inode;
 330         struct obd_trans_info oti = { 0 };
 331         struct lov_mds_md *lmm = NULL;
 332         int rc, lmm_size;
 333         struct mds_body *body;
 334         struct obd_info oinfo = { { { 0 } } };
 335         void *lmm_buf;
 336         ENTRY;
 337
 338         *objid = NULL;
 339
 340         if (!S_ISREG(inode->i_mode))
 341                 RETURN(0);
 342         if (rec->ur_flags & MDS_OPEN_DELAY_CREATE ||
 343             !(rec->ur_flags & FMODE_WRITE))
 344                 RETURN(0);
 345
 346         body = lustre_msg_buf(req->rq_repmsg, DLM_REPLY_REC_OFF, sizeof(*body));
 347
 348         if (body->valid & OBD_MD_FLEASIZE)
 349                 RETURN(0);
 350
 351         oti_init(&oti, req);
 352
 353         /* replay case */
 354         if (lustre_msg_get_flags(req->rq_reqmsg) & MSG_REPLAY) {
 355                 if (rec->ur_fid2->id == 0) {
 356                         DEBUG_REQ(D_ERROR, req, "fid2 not set on open replay");
 357                         RETURN(-EFAULT);
 358                 }
 359
 360                 body->valid |= OBD_MD_FLBLKSZ | OBD_MD_FLEASIZE;
 361                 lmm_size = rec->ur_eadatalen;
 362                 lmm = rec->ur_eadata;
 363                 LASSERT(lmm);
 364                 if (lov_mds_md_size(lmm->lmm_stripe_count,
 365                                     lmm->lmm_magic) != lmm_size)
 366                         CWARN("Bad lmm_size during open replay for inode "
 367                               "%lu\n", inode->i_ino);
 368
 369                 if (*handle == NULL) {
 370                         int stripe_count = le32_to_cpu(lmm->lmm_stripe_count);
 371                         *handle = fsfilt_start_log(obd, inode, FSFILT_OP_CREATE,
 372                                                    NULL, stripe_count);
 373                 }
 374                 if (IS_ERR(*handle)) {
 375                         rc = PTR_ERR(*handle);
 376                         *handle = NULL;
 377                         GOTO(out_ids, rc);
 378                 }
 379
 380                 rc = fsfilt_set_md(obd, inode, *handle, lmm, lmm_size, "lov");
 381                 if (rc)
 382                         CERROR("open replay failed to set md:%d\n", rc);
 383
 384                 /* for replay we not need send lmm to client, this not used now */
 385                 lustre_shrink_reply(req, offset, 0, 1);
 386                 *objid = lmm;
 387
 388                 RETURN(rc);
 389         }
 390
 391         if (OBD_FAIL_CHECK_ONCE(OBD_FAIL_MDS_ALLOC_OBDO))
 392                 GOTO(out_ids, rc = -ENOMEM);
 393
 394         OBDO_ALLOC(oinfo.oi_oa);
 395         if (oinfo.oi_oa == NULL)
 396                 GOTO(out_ids, rc = -ENOMEM);
 397         oinfo.oi_oa->o_uid = 0; /* must have 0 uid / gid on OST */
 398         oinfo.oi_oa->o_gid = 0;
 399         oinfo.oi_oa->o_mode = S_IFREG | 0600;
 400         oinfo.oi_oa->o_id = inode->i_ino;
 401         oinfo.oi_oa->o_gr = 0;
 402         oinfo.oi_oa->o_valid = OBD_MD_FLID | OBD_MD_FLTYPE | OBD_MD_FLFLAGS |
 403                 OBD_MD_FLMODE | OBD_MD_FLUID | OBD_MD_FLGID| OBD_MD_FLGROUP;
 404         oinfo.oi_oa->o_size = 0;
 405
 406         obdo_from_inode(oinfo.oi_oa, inode, OBD_MD_FLTYPE | OBD_MD_FLATIME |
 407                         OBD_MD_FLMTIME | OBD_MD_FLCTIME);
 408         if (!(rec->ur_flags & MDS_OPEN_HAS_OBJS)) {
 409                 /* check if things like lfs setstripe are sending us the ea */
 410                 if (rec->ur_flags & MDS_OPEN_HAS_EA) {
 411                         rc = obd_iocontrol(OBD_IOC_LOV_SETSTRIPE,
 412                                            mds->mds_lov_exp,
 413                                            0, &oinfo.oi_md, rec->ur_eadata);
 414                         if (rc)
 415                                 GOTO(out_oa, rc);
 416                 } else {
 417                         __u32 lmm_sz = mds->mds_max_mdsize;
 418                         OBD_ALLOC(lmm, lmm_sz);
 419                         if (lmm == NULL)
 420                                 GOTO(out_oa, rc = -ENOMEM);
 421
 422                         lmm_size = lmm_sz;
 423                         rc = mds_get_md(obd, dchild->d_parent->d_inode,
 424                                         lmm, &lmm_size, 1, 0,
 425                                         req->rq_export->exp_connect_flags);
 426                         if (rc > 0)
 427                                 rc = obd_iocontrol(OBD_IOC_LOV_SETSTRIPE,
 428                                                    mds->mds_lov_exp,
 429                                                    0, &oinfo.oi_md, lmm);
 430                         OBD_FREE(lmm, lmm_sz);
 431                         if (rc)
 432                                 GOTO(out_oa, rc);
 433                 }
 434                 rc = obd_create(mds->mds_lov_exp, oinfo.oi_oa,
 435                                 &oinfo.oi_md, &oti);
 436                 if (rc) {
 437                         int level = D_ERROR;
 438                         if (rc == -ENOSPC)
 439                                 level = D_INODE;
 440                         CDEBUG_LIMIT(level, "error creating objects for "
 441                                      "inode %lu: rc = %d\n", inode->i_ino, rc);
 442                         if (rc > 0) {
 443                                 CERROR("obd_create returned invalid "
 444                                        "rc %d\n", rc);
 445                                 rc = -EIO;
 446                         }
 447                         GOTO(out_oa, rc);
 448                 }
 449         } else {
 450                 rc = obd_iocontrol(OBD_IOC_LOV_SETEA, mds->mds_lov_exp,
 451                                    0, &oinfo.oi_md, rec->ur_eadata);
 452                 if (rc) {
 453                         GOTO(out_oa, rc);
 454                 }
 455                 oinfo.oi_md->lsm_object_id = oinfo.oi_oa->o_id;
 456         }
 457         if (i_size_read(inode)) {
 458                 oinfo.oi_oa->o_size = i_size_read(inode);
 459                 obdo_from_inode(oinfo.oi_oa, inode, OBD_MD_FLTYPE |
 460                                 OBD_MD_FLATIME | OBD_MD_FLMTIME |
 461                                 OBD_MD_FLCTIME | OBD_MD_FLSIZE);
 462
 463                 /* pack lustre id to OST */
 464                 oinfo.oi_oa->o_fid = body->fid1.id;
 465                 oinfo.oi_oa->o_generation = body->fid1.generation;
 466                 oinfo.oi_oa->o_valid |= OBD_MD_FLFID | OBD_MD_FLGENER;
 467                 oinfo.oi_policy.l_extent.start = i_size_read(inode);
 468                 oinfo.oi_policy.l_extent.end = OBD_OBJECT_EOF;
 469
 470                 rc = obd_punch_rqset(mds->mds_lov_exp, &oinfo, &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_async returned bad rc %d\n",
 476                                        rc);
 477                                 rc = -EIO;
 478                         }
 479                         GOTO(out_oa, rc);
 480                 }
 481         }
 482
 483         body->valid |= OBD_MD_FLBLKSZ | OBD_MD_FLEASIZE;
 484         obdo_refresh_inode(inode, oinfo.oi_oa, OBD_MD_FLBLKSZ);
 485
 486         LASSERT(oinfo.oi_md && oinfo.oi_md->lsm_object_id);
 487         lmm = NULL;
 488         rc = obd_packmd(mds->mds_lov_exp, &lmm, oinfo.oi_md);
 489         if (rc < 0) {
 490                 CERROR("cannot pack lsm, err = %d\n", rc);
 491                 GOTO(out_oa, rc);
 492         }
 493         lmm_size = rc;
 494         body->eadatasize = rc;
 495
 496         if (*handle == NULL)
 497                 *handle = fsfilt_start(obd, inode, FSFILT_OP_CREATE, NULL);
 498         if (IS_ERR(*handle)) {
 499                 rc = PTR_ERR(*handle);
 500                 *handle = NULL;
 501                 GOTO(free_diskmd, rc);
 502         }
 503
 504         rc = fsfilt_set_md(obd, inode, *handle, lmm, lmm_size, "lov");
 505         lmm_buf = lustre_msg_buf(req->rq_repmsg, offset, lmm_size);
 506         LASSERT(lmm_buf);
 507         memcpy(lmm_buf, lmm, lmm_size);
 508         *objid = lmm_buf; /* save for mds_lov_update_objid */
 509
 510  free_diskmd:
 511         obd_free_diskmd(mds->mds_lov_exp, &lmm);
 512  out_oa:
 513         oti_free_cookies(&oti);
 514         OBDO_FREE(oinfo.oi_oa);
 515  out_ids:
 516         if (oinfo.oi_md)
 517                 obd_free_memmd(mds->mds_lov_exp, &oinfo.oi_md);
 518         RETURN(rc);
 519 }
 520
 521 static void reconstruct_open(struct mds_update_record *rec, int offset,
 522                              struct ptlrpc_request *req,
 523                              struct lustre_handle *child_lockh)
 524 {
 525         struct mds_export_data *med = &req->rq_export->exp_mds_data;
 526         struct lsd_client_data *lcd = med->med_lcd;
 527         struct mds_obd *mds = mds_req2mds(req);
 528         struct mds_file_data *mfd = NULL;
 529         struct obd_export *exp = req->rq_export;
 530         struct obd_device *obd = exp->exp_obd;
 531         struct dentry *parent, *dchild;
 532         struct ldlm_reply *rep;
 533         struct mds_body *body;
 534         struct list_head *t;
 535         int rc;
 536         int put_child = 1;
 537         ENTRY;
 538
 539         LASSERT(offset == DLM_INTENT_REC_OFF); /* only called via intent */
 540         rep = lustre_msg_buf(req->rq_repmsg, DLM_LOCKREPLY_OFF, sizeof(*rep));
 541         body = lustre_msg_buf(req->rq_repmsg, DLM_REPLY_REC_OFF, sizeof(*body));
 542
 543         /* copy rc, transno and disp; steal locks */
 544         mds_req_from_lcd(req, lcd);
 545         ldlm_reply_set_disposition(rep, le32_to_cpu(lcd->lcd_last_data));
 546
 547         /* Only replay if create or open actually happened. */
 548         if (!ldlm_reply_disposition(rep, DISP_OPEN_CREATE | DISP_OPEN_OPEN) ) {
 549                 EXIT;
 550                 return; /* error looking up parent or child */
 551         }
 552
 553         /* If we failed, then we must have failed opening, so don't look for
 554          * file descriptor or anything, just give the client the bad news.
 555          */
 556         if (req->rq_status) {
 557                 EXIT;
 558                 return;
 559         }
 560
 561         /* Now let's see if we have file descriptor present.
 562          * No need to lookup child as it could be already deleted by another
 563          * thread (bug 15010) */
 564         spin_lock(&med->med_open_lock);
 565         list_for_each(t, &med->med_open_head) {
 566                 mfd = list_entry(t, struct mds_file_data, mfd_list);
 567                 if (mfd->mfd_xid == req->rq_xid) {
 568                         mds_mfd_addref(mfd);
 569                         break;
 570                 }
 571                 mfd = NULL;
 572         }
 573         spin_unlock(&med->med_open_lock);
 574
 575         if (mfd && mfd->mfd_dentry && mfd->mfd_dentry->d_inode) {
 576                 dchild = mfd->mfd_dentry;
 577                 put_child = 0;
 578         } else {
 579                 parent = mds_fid2dentry(mds, rec->ur_fid1, NULL);
 580                 if (IS_ERR(parent)) {
 581                         rc = PTR_ERR(parent);
 582                         LCONSOLE_WARN("Parent "LPU64"/%u lookup error %d."
 583                                       " Evicting client %s with export %s.\n",
 584                                       rec->ur_fid1->id,rec->ur_fid1->generation,
 585                                       rc, obd_uuid2str(&exp->exp_client_uuid),
 586                                       obd_export_nid2str(exp));
 587                         mds_export_evict(exp);
 588                         EXIT;
 589                         return;
 590                 }
 591
 592                 dchild = mds_lookup(obd, rec->ur_name, parent, rec->ur_namelen - 1);
 593                 l_dput(parent);
 594                 if (IS_ERR(dchild)) {
 595                         rc = PTR_ERR(dchild);
 596                         LCONSOLE_WARN("Child "LPU64"/%u lookup error %d."
 597                                       " Evicting client %s with export %s.\n",
 598                                       rec->ur_fid1->id,rec->ur_fid1->generation,
 599                                       rc, obd_uuid2str(&exp->exp_client_uuid),
 600                                       obd_export_nid2str(exp));
 601                         mds_export_evict(exp);
 602                         EXIT;
 603                         return;
 604                 }
 605         }
 606
 607         if (!dchild->d_inode)
 608                 GOTO(out_dput, 0); /* child not present to open */
 609
 610         /* At this point, we know we have a child. We'll send
 611          * it back _unless_ it not created and open failed.
 612          */
 613         if (ldlm_reply_disposition(rep, DISP_OPEN_OPEN) &&
 614             !ldlm_reply_disposition(rep, DISP_OPEN_CREATE) &&
 615             req->rq_status) {
 616                 GOTO(out_dput, 0);
 617         }
 618
 619         mds_pack_inode2body(body, dchild->d_inode);
 620         if (S_ISREG(dchild->d_inode->i_mode)) {
 621                 rc = mds_pack_md(obd, req->rq_repmsg, DLM_REPLY_REC_OFF + 1,
 622                                  body, dchild->d_inode, 1, 0,
 623                                  req->rq_export->exp_connect_flags);
 624
 625                 if (rc)
 626                         LASSERT(rc == req->rq_status);
 627
 628                 /* If we have LOV EA data, the OST holds size, mtime */
 629                 if (!(body->valid & OBD_MD_FLEASIZE))
 630                         body->valid |= (OBD_MD_FLSIZE | OBD_MD_FLBLOCKS |
 631                                         OBD_MD_FLATIME | OBD_MD_FLMTIME);
 632         }
 633
 634         if (!(rec->ur_flags & MDS_OPEN_JOIN_FILE))
 635                 lustre_shrink_reply(req, DLM_REPLY_REC_OFF + 1,
 636                                     body->eadatasize, 0);
 637
 638         if (req->rq_export->exp_connect_flags & OBD_CONNECT_ACL &&
 639             !(rec->ur_flags & MDS_OPEN_JOIN_FILE)) {
 640                 int acl_off = DLM_REPLY_REC_OFF + (body->eadatasize ? 2 : 1);
 641
 642                 rc = mds_pack_acl(med, dchild->d_inode, req->rq_repmsg,
 643                                   body, acl_off);
 644                 lustre_shrink_reply(req, acl_off, body->aclsize, 0);
 645                 if (!req->rq_status && rc)
 646                         req->rq_status = rc;
 647         }
 648
 649         /* #warning "XXX fixme" bug 2991 */
 650         /* Here it used to LASSERT(mfd) if exp_outstanding_reply != NULL.
 651          * Now that exp_outstanding_reply is a list, it's just using mfd != NULL
 652          * to detect a re-open */
 653         if (mfd == NULL) {
 654                 if (rec->ur_flags & MDS_OPEN_JOIN_FILE) {
 655 #if LUSTRE_FIX >= 50
 656                         /* Allow file join in beta builds to allow debugging */
 657                         rc = mds_join_file(rec, req, dchild, NULL);
 658                         if (rc)
 659                                 GOTO(out_dput, rc);
 660 #else
 661                         CWARN("file join is not supported in this version of "
 662                               "Lustre\n");
 663                         GOTO(out_dput, req->rq_status = rc = -EOPNOTSUPP);
 664 #endif
 665                 }
 666                 mntget(mds->mds_vfsmnt);
 667                 CERROR("Re-opened file \n");
 668                 mfd = mds_dentry_open(dchild, mds->mds_vfsmnt,
 669                                       rec->ur_flags & ~MDS_OPEN_TRUNC, req);
 670                 mntput(mds->mds_vfsmnt);
 671                 if (IS_ERR(mfd)) {
 672                         req->rq_status = PTR_ERR(mfd);
 673                         mfd = NULL;
 674                         CERROR("%s: opening inode "LPU64" failed: rc %d\n",
 675                                req->rq_export->exp_obd->obd_name,
 676                                (__u64)dchild->d_inode->i_ino, req->rq_status);
 677                         GOTO(out_dput, req->rq_status);
 678                 }
 679         } else {
 680                 body->handle.cookie = mfd->mfd_handle.h_cookie;
 681                 CDEBUG(D_INODE, "resend mfd %p, cookie "LPX64"\n", mfd,
 682                        mfd->mfd_handle.h_cookie);
 683         }
 684
 685         if (!ldlm_reply_disposition(rep, DISP_OPEN_LOCK))
 686                 GOTO(out_dput, 0);
 687
 688         /* child_lockh has been set in fixup_handle_for_resent_req called
 689          * in mds_intent_policy for resent request */
 690         if (child_lockh == NULL || !lustre_handle_is_used(child_lockh)) {
 691                 /* the lock is already canceled! clear DISP_OPEN_LOCK */
 692                 ldlm_reply_clear_disposition(rep, DISP_OPEN_LOCK);
 693         }
 694
 695  out_dput:
 696         if (mfd)
 697                 mds_mfd_put(mfd);
 698
 699         if (put_child)
 700                 l_dput(dchild);
 701         EXIT;
 702 }
 703
 704 /* if client disconnects during recovery it may resend opens which were replayed
 705  * on server but their transno less then last_transno on server so they will not
 706  * be detected as reconstructs */
 707 static int open_replay_reconstruct(struct ptlrpc_request *req)
 708 {
 709         struct mds_export_data *med = &req->rq_export->exp_mds_data;
 710         struct mds_file_data *mfd = NULL;
 711         struct list_head *t;
 712
 713         if (!(lustre_msg_get_flags(req->rq_reqmsg) & MSG_RESENT))
 714                 return 0;
 715
 716         if (!(lustre_msg_get_flags(req->rq_reqmsg) & MSG_REPLAY))
 717                 return 0;
 718
 719         /* if mfd exists then replay was done already */
 720         spin_lock(&med->med_open_lock);
 721         list_for_each(t, &med->med_open_head) {
 722                 mfd = list_entry(t, struct mds_file_data, mfd_list);
 723                 if (mfd->mfd_xid == req->rq_xid) {
 724                         mds_mfd_addref(mfd);
 725                         break;
 726                 }
 727                 mfd = NULL;
 728         }
 729         spin_unlock(&med->med_open_lock);
 730
 731         if (mfd) {
 732                 struct mds_body *body = lustre_msg_buf(req->rq_repmsg,
 733                                                        DLM_REPLY_REC_OFF,
 734                                                        sizeof(*body));
 735                 __u64 *pre_versions = lustre_msg_get_versions(req->rq_reqmsg);
 736
 737                 body->handle.cookie = mfd->mfd_handle.h_cookie;
 738                 CDEBUG(D_INODE, "resend mfd %p, cookie "LPX64"\n", mfd,
 739                        mfd->mfd_handle.h_cookie);
 740                 mds_mfd_put(mfd);
 741                 lustre_msg_set_versions(req->rq_repmsg, pre_versions);
 742                 lustre_msg_set_transno(req->rq_repmsg,
 743                                        lustre_msg_get_transno(req->rq_reqmsg));
 744                 lustre_msg_set_status(req->rq_repmsg, 0);
 745                 return 1;
 746         }
 747         return 0;
 748 }
 749
 750 /* do NOT or the MAY_*'s, you'll get the weakest */
 751 static int accmode(struct inode *inode, int flags)
 752 {
 753         int res = 0;
 754
 755         /* Sadly, NFSD reopens a file repeatedly during operation, so the
 756          * "acc_mode = 0" allowance for newly-created files isn't honoured.
 757          * NFSD uses the MDS_OPEN_OWNEROVERRIDE flag to say that a file
 758          * owner can write to a file even if it is marked readonly to hide
 759          * its brokenness. (bug 5781) */
 760         if (flags & MDS_OPEN_OWNEROVERRIDE && inode->i_uid == current_fsuid())
 761                 return 0;
 762
 763         if (flags & FMODE_READ)
 764                 res = MAY_READ;
 765         if (flags & (FMODE_WRITE|MDS_OPEN_TRUNC))
 766                 res |= MAY_WRITE;
 767         if (flags & MDS_FMODE_EXEC)
 768                 res = MAY_EXEC;
 769         return res;
 770 }
 771
 772 /* Handles object creation, actual opening, and I/O epoch */
 773 static int mds_finish_open(struct ptlrpc_request *req, struct dentry *dchild,
 774                            struct mds_body *body, int flags, void **handle,
 775                            struct mds_update_record *rec,struct ldlm_reply *rep,
 776                            struct lustre_handle *lockh)
 777 {
 778         struct mds_obd *mds = mds_req2mds(req);
 779         struct obd_device *obd = req->rq_export->exp_obd;
 780         struct mds_file_data *mfd = NULL;
 781         struct lov_mds_md *lmm = NULL; /* object IDs created */
 782         int rc = 0;
 783         ENTRY;
 784
 785         /* atomically create objects if necessary */
 786         LOCK_INODE_MUTEX(dchild->d_inode);
 787
 788         if (S_ISREG(dchild->d_inode->i_mode) &&
 789             !(body->valid & OBD_MD_FLEASIZE)) {
 790                 rc = mds_pack_md(obd, req->rq_repmsg, DLM_REPLY_REC_OFF + 1,
 791                                  body, dchild->d_inode, 0, 0,
 792                                  req->rq_export->exp_connect_flags);
 793                 if (rc) {
 794                         UNLOCK_INODE_MUTEX(dchild->d_inode);
 795                         RETURN(rc);
 796                 }
 797         }
 798         if (rec != NULL) {
 799                 if ((body->valid & OBD_MD_FLEASIZE) &&
 800                     (rec->ur_flags & MDS_OPEN_HAS_EA)) {
 801                         UNLOCK_INODE_MUTEX(dchild->d_inode);
 802                         RETURN(-EEXIST);
 803                 }
 804                 if (rec->ur_flags & MDS_OPEN_JOIN_FILE) {
 805 #if LUSTRE_FIX >= 50
 806                         /* Allow file join in beta builds to allow debugging */
 807                         UNLOCK_INODE_MUTEX(dchild->d_inode);
 808                         rc = mds_join_file(rec, req, dchild, lockh);
 809                         if (rc)
 810                                 RETURN(rc);
 811                         LOCK_INODE_MUTEX(dchild->d_inode);
 812 #else
 813                         CWARN("file join is not supported in this version of "
 814                               "Lustre\n");
 815                         RETURN(-EOPNOTSUPP);
 816 #endif
 817                 }
 818                 if (!(body->valid & OBD_MD_FLEASIZE) &&
 819                     !(body->valid & OBD_MD_FLMODEASIZE)) {
 820                         /* split open transactions here */
 821                         OBD_FAIL_TIMEOUT(OBD_FAIL_MDS_SPLIT_OPEN, 10);
 822                         /* no EA: create objects */
 823                         rc = mds_create_objects(req, DLM_REPLY_REC_OFF + 1, rec,
 824                                                 mds, obd, dchild, handle, &lmm);
 825                         if (rc) {
 826                                 CERROR("mds_create_objects: rc = %d\n", rc);
 827                                 UNLOCK_INODE_MUTEX(dchild->d_inode);
 828                                 RETURN(rc);
 829                         }
 830                 }
 831         }
 832         /* If the inode has no EA data, then MDS holds size, mtime */
 833         if (S_ISREG(dchild->d_inode->i_mode) &&
 834             !(body->valid & OBD_MD_FLEASIZE)) {
 835                 body->valid |= (OBD_MD_FLSIZE | OBD_MD_FLBLOCKS |
 836                                 OBD_MD_FLATIME | OBD_MD_FLMTIME);
 837         }
 838         UNLOCK_INODE_MUTEX(dchild->d_inode);
 839
 840         if (req->rq_export->exp_connect_flags & OBD_CONNECT_ACL &&
 841             rec && !(rec->ur_flags & MDS_OPEN_JOIN_FILE)) {
 842                 int acl_off = DLM_REPLY_REC_OFF + 2;
 843
 844                 rc = mds_pack_acl(&req->rq_export->exp_mds_data,
 845                                   dchild->d_inode, req->rq_repmsg,
 846                                   body, acl_off);
 847                 if (rc)
 848                         RETURN(rc);
 849         }
 850
 851         if ((rc = mds_lov_prepare_objids(obd,lmm)) != 0)
 852                 RETURN(rc);
 853
 854         mfd = mds_dentry_open(dchild, mds->mds_vfsmnt, flags, req);
 855         if (IS_ERR(mfd))
 856                 RETURN(PTR_ERR(mfd));
 857
 858         CDEBUG(D_INODE, "mfd %p, cookie "LPX64"\n", mfd,
 859                mfd->mfd_handle.h_cookie);
 860
 861         mds_lov_update_objids(obd, lmm);
 862
 863         if (rc)
 864                 mds_mfd_unlink(mfd, 1);
 865
 866         mds_mfd_put(mfd);
 867         RETURN(rc);
 868 }
 869
 870 static int mds_open_by_fid(struct ptlrpc_request *req, struct ll_fid *fid,
 871                            struct mds_body *body, int flags,
 872                            struct mds_update_record *rec,struct ldlm_reply *rep)
 873 {
 874         struct obd_device *obd = req->rq_export->exp_obd;
 875         struct mds_obd *mds = mds_req2mds(req);
 876         struct dentry *dchild, *dparent = NULL;
 877         char fidname[LL_FID_NAMELEN];
 878         int fidlen = 0, rc;
 879         void *handle = NULL;
 880         struct inode *inodes[PTLRPC_NUM_VERSIONS] = { NULL };
 881         ENTRY;
 882
 883         ldlm_reply_set_disposition(rep, DISP_LOOKUP_EXECD);
 884         fidlen = ll_fid2str(fidname, fid->id, fid->generation);
 885         dchild = mds_lookup(obd, fidname, mds->mds_pending_dir, fidlen);
 886         if (IS_ERR(dchild)) {
 887                 rc = PTR_ERR(dchild);
 888                 CERROR("error looking up %s in PENDING: rc = %d\n",fidname, rc);
 889                 RETURN(rc);
 890         }
 891
 892         if (dchild->d_inode != NULL) {
 893                 mds_inode_set_orphan(dchild->d_inode);
 894                 CWARN("Orphan %s found and opened in PENDING directory\n",
 895                        fidname);
 896         } else {
 897                 __u64 *pre_versions = lustre_msg_get_versions(req->rq_reqmsg);
 898                 l_dput(dchild);
 899
 900                 /* We didn't find it in PENDING so it isn't an orphan.  See
 901                  * if it was a regular inode that was previously created. */
 902                 dchild = mds_fid2dentry(mds, fid, NULL);
 903                 if (IS_ERR(dchild))
 904                         RETURN(PTR_ERR(dchild));
 905                 /**
 906                  * bug19224
 907                  * this can be replay of partially committed open|create,
 908                  * the create itself was committed while LOV EA weren't
 909                  * We need to set versions again if conditions are:
 910                  * - this is replay
 911                  * - the transaction is greater than last_committed
 912                  * - this was open|create
 913                  * - there was real create so parent pre_version was saved
 914                  */
 915                 if ((lustre_msg_get_flags(req->rq_reqmsg) & MSG_REPLAY) &&
 916                     (lustre_msg_get_transno(req->rq_reqmsg) >
 917                      req->rq_export->exp_last_committed) &&
 918                     (rec->ur_flags & MDS_OPEN_CREAT) &&
 919                     (pre_versions && pre_versions[0] != 0)) {
 920                         /* need parent to set version */
 921                         dparent = mds_fid2dentry(mds, rec->ur_fid1, NULL);
 922                         if (IS_ERR(dparent)) {
 923                                 CERROR("Can't find parent for open replay\n");
 924                                 l_dput(dchild);
 925                                 RETURN(PTR_ERR(dparent));
 926                         }
 927                         /* though file was created, the versions were not
 928                          * changed yet, need to replay that too */
 929                         inodes[0] = dparent->d_inode;
 930                         inodes[1] = dchild->d_inode;
 931                 }
 932         }
 933
 934         mds_pack_inode2body(body, dchild->d_inode);
 935         ldlm_reply_set_disposition(rep, DISP_LOOKUP_POS);
 936         ldlm_reply_set_disposition(rep, DISP_OPEN_OPEN);
 937
 938         rc = mds_finish_open(req, dchild, body, flags, &handle, rec, rep, NULL);
 939         rc = mds_finish_transno(mds, inodes, handle,
 940                                 req, rc, rep ? rep->lock_policy_res1 : 0, 0);
 941         /* XXX what do we do here if mds_finish_transno itself failed? */
 942
 943         l_dput(dparent);
 944         l_dput(dchild);
 945         RETURN(rc);
 946 }
 947
 948 int mds_pin(struct ptlrpc_request *req, int offset)
 949 {
 950         struct obd_device *obd = req->rq_export->exp_obd;
 951         struct mds_body *reqbody, *repbody;
 952         struct lvfs_run_ctxt saved;
 953         int rc, size[2] = { sizeof(struct ptlrpc_body), sizeof(*repbody) };
 954         ENTRY;
 955
 956         reqbody = lustre_msg_buf(req->rq_reqmsg, offset, sizeof(*reqbody));
 957
 958         rc = lustre_pack_reply(req, 2, size, NULL);
 959         if (rc)
 960                 RETURN(rc);
 961
 962         repbody = lustre_msg_buf(req->rq_repmsg, REPLY_REC_OFF,
 963                                  sizeof(*repbody));
 964
 965         push_ctxt(&saved, &obd->obd_lvfs_ctxt, NULL);
 966         rc = mds_open_by_fid(req, &reqbody->fid1, repbody, reqbody->flags, NULL,
 967                              NULL);
 968         pop_ctxt(&saved, &obd->obd_lvfs_ctxt, NULL);
 969
 970         RETURN(rc);
 971 }
 972
 973 /*  Get an internal lock on the inode number (but not generation) to sync
 974  *  new inode creation with inode unlink (bug 2029).  If child_lockh is NULL
 975  *  we just get the lock as a barrier to wait for other holders of this lock,
 976  *  and drop it right away again. */
 977 int mds_lock_new_child(struct obd_device *obd, struct inode *inode,
 978                        struct lustre_handle *child_lockh)
 979 {
 980         struct ldlm_res_id child_res_id = { .name = { inode->i_ino, 0, 1, 0 } };
 981         struct lustre_handle lockh;
 982         int lock_flags = LDLM_FL_ATOMIC_CB;
 983         int rc;
 984
 985         if (child_lockh == NULL)
 986                 child_lockh = &lockh;
 987
 988         rc = ldlm_cli_enqueue_local(obd->obd_namespace, &child_res_id,
 989                                     LDLM_PLAIN, NULL, LCK_EX, &lock_flags,
 990                                     ldlm_blocking_ast, ldlm_completion_ast,
 991                                     NULL, NULL, 0, NULL, child_lockh);
 992         if (rc != ELDLM_OK)
 993                 CERROR("ldlm_cli_enqueue_local: %d\n", rc);
 994         else if (child_lockh == &lockh)
 995                 ldlm_lock_decref(child_lockh, LCK_EX);
 996
 997         RETURN(rc);
 998 }
 999
1000 int noinline mds_get_open_lock(struct obd_device *obd, struct dentry *dchild,
1001                                int child_mode, struct lustre_handle *child_lockh,
1002                                struct ldlm_reply *rep)
1003 {
1004         ldlm_policy_data_t policy = { .l_inodebits = { MDS_INODELOCK_LOOKUP | MDS_INODELOCK_OPEN } };
1005         struct ldlm_res_id child_res_id;
1006         int rc = 0, lock_flags = 0;
1007
1008         /* In case of replay we do not get a lock assuming that the
1009            caller has it already */
1010         memset(&child_res_id, 0, sizeof(child_res_id));
1011         child_res_id.name[0] = dchild->d_inode->i_ino;
1012         child_res_id.name[1] = dchild->d_inode->i_generation;
1013
1014         rc = ldlm_cli_enqueue_local(obd->obd_namespace, &child_res_id,
1015                                     LDLM_IBITS, &policy, child_mode,
1016                                     &lock_flags, ldlm_blocking_ast,
1017                                     ldlm_completion_ast, NULL, NULL,
1018                                     0, NULL, child_lockh);
1019         if (rc != ELDLM_OK)
1020                 goto out;
1021
1022         /* Let mds_intent_policy know that we have a lock to return */
1023         ldlm_reply_set_disposition(rep, DISP_OPEN_LOCK);
1024
1025 out:
1026         return rc;
1027 }
1028
1029 int mds_open(struct mds_update_record *rec, int offset,
1030              struct ptlrpc_request *req, struct lustre_handle *child_lockh)
1031 {
1032         /* XXX ALLOCATE _something_ - 464 bytes on stack here */
1033         struct obd_device *obd = req->rq_export->exp_obd;
1034         struct mds_obd *mds = mds_req2mds(req);
1035         struct ldlm_reply *rep = NULL;
1036         struct mds_body *body = NULL;
1037         struct dentry *dchild = NULL, *dparent = NULL;
1038         struct inode *inodes[PTLRPC_NUM_VERSIONS] = { NULL };
1039         struct mds_export_data *med;
1040         struct lustre_handle parent_lockh;
1041         int rc = 0, cleanup_phase = 0, acc_mode, created = 0;
1042         int parent_mode = LCK_CR;
1043         void *handle = NULL;
1044         struct lvfs_dentry_params dp = LVFS_DENTRY_PARAMS_INIT;
1045         unsigned int qcids[MAXQUOTAS] = { current_fsuid(), current_fsgid() };
1046         unsigned int qpids[MAXQUOTAS] = { 0, 0 };
1047         unsigned int ids[MAXQUOTAS] = { 0, 0 };
1048         int child_mode = LCK_CR;
1049         /* Always returning LOOKUP lock if open succesful to guard
1050            dentry on client. */
1051         int quota_pending[2] = {0, 0};
1052         int use_parent, need_open_lock;
1053         unsigned int gid = current_fsgid();
1054         ENTRY;
1055
1056         mds_counter_incr(req->rq_export, LPROC_MDS_OPEN);
1057
1058         OBD_FAIL_TIMEOUT(OBD_FAIL_MDS_PAUSE_OPEN | OBD_FAIL_ONCE,
1059                          (obd_timeout + 1) / 4);
1060
1061         CLASSERT(MAXQUOTAS < 4);
1062         if (offset == DLM_INTENT_REC_OFF) { /* intent */
1063                 rep = lustre_msg_buf(req->rq_repmsg, DLM_LOCKREPLY_OFF,
1064                                      sizeof(*rep));
1065                 body = lustre_msg_buf(req->rq_repmsg, DLM_REPLY_REC_OFF,
1066                                       sizeof(*body));
1067         } else if (offset == REQ_REC_OFF) { /* non-intent reint */
1068                 body = lustre_msg_buf(req->rq_repmsg, REPLY_REC_OFF,
1069                                       sizeof(*body));
1070                 LBUG(); /* XXX: not supported yet? */
1071         } else {
1072                 body = NULL;
1073                 LBUG();
1074         }
1075
1076         /* check the open resent|replay case */
1077         if (open_replay_reconstruct(req))
1078                 RETURN(0);
1079
1080         MDS_CHECK_RESENT(req, reconstruct_open(rec, offset, req, child_lockh));
1081
1082         /* Step 0: If we are passed a fid, then we assume the client already
1083          * opened this file and is only replaying the RPC, so we open the
1084          * inode by fid (at some large expense in security). */
1085         /*XXX liblustre use mds_open_by_fid to implement LL_IOC_LOV_SETSTRIPE */
1086         if (((lustre_msg_get_flags(req->rq_reqmsg) & MSG_REPLAY) ||
1087              (req->rq_export->exp_libclient && rec->ur_flags&MDS_OPEN_HAS_EA))&&
1088             !(rec->ur_flags & MDS_OPEN_JOIN_FILE)) {
1089                 if (rec->ur_fid2->id == 0) {
1090                         struct ldlm_lock *lock = ldlm_handle2lock(child_lockh);
1091                         if (lock) {
1092                                 LDLM_ERROR(lock, "fid2 not set on open replay");
1093                                 LDLM_LOCK_PUT(lock);
1094                         }
1095                         DEBUG_REQ(D_ERROR, req, "fid2 not set on open replay");
1096                         RETURN(-EFAULT);
1097                 }
1098
1099                 /** check there is no stale orphan with same inode number */
1100                 if (rec->ur_flags & MDS_OPEN_CREAT) {
1101                         rc = mds_check_stale_orphan(obd, rec->ur_fid2);
1102                         if (rc)
1103                                 RETURN(rc);
1104                 }
1105
1106                 rc = mds_open_by_fid(req, rec->ur_fid2, body, rec->ur_flags,
1107                                      rec, rep);
1108                 if (rc != -ENOENT) {
1109                         if (req->rq_export->exp_libclient &&
1110                             rec->ur_flags & MDS_OPEN_HAS_EA)
1111                                 RETURN(0);
1112
1113                         RETURN(rc);
1114                 }
1115
1116                 /* We didn't find the correct inode on disk either, so we
1117                  * need to re-create it via a regular replay. */
1118                 if (!(rec->ur_flags & MDS_OPEN_CREAT)) {
1119                         DEBUG_REQ(D_ERROR, req,"OPEN_CREAT not in open replay");
1120                         RETURN(-EFAULT);
1121                 }
1122         } else if (rec->ur_fid2->id) {
1123                 DEBUG_REQ(D_ERROR, req, "fid2 "LPU64"/%u on open non-replay",
1124                           rec->ur_fid2->id, rec->ur_fid2->generation);
1125                 RETURN(-EFAULT);
1126         }
1127
1128         /* If we got here, we must be called via intent */
1129         LASSERT(offset == DLM_INTENT_REC_OFF);
1130
1131         med = &req->rq_export->exp_mds_data;
1132         if (OBD_FAIL_CHECK(OBD_FAIL_MDS_OPEN_PACK)) {
1133                 CERROR("test case OBD_FAIL_MDS_OPEN_PACK\n");
1134                 RETURN(-ENOMEM);
1135         }
1136
1137         if (rec->ur_flags & (MDS_OPEN_CREAT | MDS_OPEN_JOIN_FILE))
1138                 parent_mode = LCK_EX;
1139
1140         /* We cannot use acc_mode here, because it is zeroed in case of
1141            creating a file, so we get wrong lockmode */
1142         if (rec->ur_flags & FMODE_WRITE)
1143                 child_mode = LCK_CW;
1144         else if (rec->ur_flags & MDS_FMODE_EXEC)
1145                 child_mode = LCK_PR;
1146         else
1147                 child_mode = LCK_CR;
1148
1149         /* join file and nfsd can't need lookup dchild as use parent for it */
1150         use_parent = (!(lustre_msg_get_flags(req->rq_reqmsg) & MSG_REPLAY) &&
1151                      (rec->ur_flags & MDS_OPEN_LOCK) && (rec->ur_namelen == 1)) ||
1152                      (rec->ur_flags & MDS_OPEN_JOIN_FILE);
1153
1154         need_open_lock = !(lustre_msg_get_flags(req->rq_reqmsg) & MSG_REPLAY) &&
1155                            (rec->ur_flags & MDS_OPEN_LOCK);
1156
1157         /* Try to lock both parent and child first. If child is not found,
1158          * return only locked parent.  This is enough to prevent other
1159          * threads from changing this directory until creation is finished. */
1160         rc = mds_get_parent_child_locked(obd, &obd->u.mds,
1161                                          rec->ur_fid1,
1162                                          &parent_lockh,
1163                                          &dparent, parent_mode,
1164                                          MDS_INODELOCK_UPDATE,
1165                                          use_parent ? NULL : rec->ur_name,
1166                                          rec->ur_namelen,
1167                                          (rec->ur_flags & MDS_OPEN_LOCK) ?
1168                                                 child_lockh : NULL,
1169                                          &dchild, child_mode,
1170                                          MDS_INODELOCK_LOOKUP |
1171                                          MDS_INODELOCK_OPEN);
1172
1173         if (rc) {
1174                 if (rc != -ENOENT) {
1175                         CERROR("parent "LPU64"/%u lookup/take lock error %d\n",
1176                                rec->ur_fid1->id, rec->ur_fid1->generation, rc);
1177                 } else {
1178                         /* Just cannot find parent - make it look like
1179                          * usual negative lookup to avoid extra MDS RPC */
1180                         ldlm_reply_set_disposition(rep, DISP_LOOKUP_EXECD);
1181                         ldlm_reply_set_disposition(rep, DISP_LOOKUP_NEG);
1182                 }
1183                 GOTO(cleanup, rc);
1184         }
1185         LASSERT(dparent->d_inode != NULL);
1186
1187         cleanup_phase = 1; /* parent dentry and lock */
1188
1189         if (use_parent)
1190                 dchild = dget(dparent);
1191
1192         if (rec->ur_flags & MDS_OPEN_JOIN_FILE) {
1193                 acc_mode = accmode(dchild->d_inode, rec->ur_flags);
1194                 GOTO(found_child, rc);
1195         }
1196
1197         cleanup_phase = 2; /* child dentry */
1198
1199         ldlm_reply_set_disposition(rep, DISP_LOOKUP_EXECD);
1200         if (dchild->d_inode)
1201                 ldlm_reply_set_disposition(rep, DISP_LOOKUP_POS);
1202         else
1203                 ldlm_reply_set_disposition(rep, DISP_LOOKUP_NEG);
1204
1205         /*Step 3: If the child was negative, and we're supposed to, create it.*/
1206         if (dchild->d_inode == NULL) {
1207                 unsigned long ino = rec->ur_fid2->id;
1208                 struct iattr *iattr;
1209                 struct inode *inode;
1210
1211                 if (!(rec->ur_flags & MDS_OPEN_CREAT)) {
1212                         /* It's negative and we weren't supposed to create it */
1213                         GOTO(cleanup, rc = -ENOENT);
1214                 }
1215
1216                 if (req->rq_export->exp_connect_flags & OBD_CONNECT_RDONLY)
1217                         GOTO(cleanup, rc = -EROFS);
1218
1219                 /** check there is no stale orphan with same inode number */
1220                 rc = mds_check_stale_orphan(obd, rec->ur_fid2);
1221                 if (rc)
1222                         GOTO(cleanup, rc);
1223
1224                 /* version recovery check */
1225                 rc = mds_version_get_check(req, dparent->d_inode, 0);
1226                 if (rc)
1227                         GOTO(cleanup_no_trans, rc);
1228
1229                 if (dparent->d_inode->i_mode & S_ISGID)
1230                         gid = dparent->d_inode->i_gid;
1231                 else
1232                         gid = current_fsgid();
1233
1234                 /* we try to get enough quota to write here, and let ldiskfs
1235                  * decide if it is out of quota or not b=14783
1236                  * FIXME: after CMD is used, pointer to obd_trans_info* couldn't
1237                  * be NULL, b=14840 */
1238                 ids[0] = current_fsuid();
1239                 ids[1] = gid;
1240                 lquota_chkquota(mds_quota_interface_ref, req->rq_export,
1241                                 ids[0], ids[1], 1, quota_pending,
1242                                 NULL, NULL, 0);
1243
1244                 ldlm_reply_set_disposition(rep, DISP_OPEN_CREATE);
1245                 handle = fsfilt_start(obd, dparent->d_inode, FSFILT_OP_CREATE,
1246                                       NULL);
1247                 if (IS_ERR(handle)) {
1248                         rc = PTR_ERR(handle);
1249                         handle = NULL;
1250                         GOTO(cleanup, rc);
1251                 }
1252                 dchild->d_fsdata = (void *) &dp;
1253                 dp.ldp_ptr = req;
1254                 dp.ldp_inum = ino;
1255
1256                 LOCK_INODE_MUTEX(dparent->d_inode);
1257                 rc = ll_vfs_create(dparent->d_inode, dchild, rec->ur_mode,NULL);
1258                 UNLOCK_INODE_MUTEX(dparent->d_inode);
1259                 if (dchild->d_fsdata == (void *)(unsigned long)ino)
1260                         dchild->d_fsdata = NULL;
1261
1262                 if (rc) {
1263                         CDEBUG(D_INODE, "error during create: %d\n", rc);
1264                         GOTO(cleanup, rc);
1265                 }
1266                 inode = dchild->d_inode;
1267                 created = 1;
1268                 if (ino) {
1269                         if (ino != inode->i_ino) {
1270                                 /* FID support is needed to replay this
1271                                  * correctly. Now fail gracefully like there is
1272                                  * version mismatch */
1273                                 if (req->rq_export->exp_delayed)
1274                                         rc = -EOVERFLOW;
1275                                 else
1276                                         rc = -EFAULT;
1277                                 CERROR("file recreated with wrong inode number"
1278                                        " %lu != %lu\n", ino, inode->i_ino);
1279                                 GOTO(cleanup, rc);
1280                         }
1281                         /* Written as part of setattr */
1282                         inode->i_generation = rec->ur_fid2->generation;
1283                         CDEBUG(D_HA, "recreated ino %lu with gen %u\n",
1284                                inode->i_ino, inode->i_generation);
1285                 }
1286
1287                 OBD_ALLOC_PTR(iattr);
1288                 if (iattr == NULL)
1289                         GOTO(cleanup, rc = -ENOMEM);
1290
1291                 LTIME_S(iattr->ia_atime) = rec->ur_time;
1292                 LTIME_S(iattr->ia_ctime) = rec->ur_time;
1293                 LTIME_S(iattr->ia_mtime) = rec->ur_time;
1294
1295                 iattr->ia_uid = current_fsuid();  /* set by push_ctxt already */
1296                 iattr->ia_gid = gid;
1297
1298                 iattr->ia_valid = ATTR_UID | ATTR_GID | ATTR_ATIME |
1299                         ATTR_MTIME | ATTR_CTIME;
1300
1301                 rc = fsfilt_setattr(obd, dchild, handle, iattr, 0);
1302                 if (rc)
1303                         CERROR("error on child setattr: rc = %d\n", rc);
1304
1305                 iattr->ia_valid = ATTR_MTIME | ATTR_CTIME;
1306
1307                 rc = fsfilt_setattr(obd, dparent, handle, iattr, 0);
1308                 if (rc)
1309                         CERROR("error on parent setattr: rc = %d\n", rc);
1310
1311                 OBD_FREE_PTR(iattr);
1312
1313                 rc = fsfilt_commit(obd, dchild->d_inode, handle, 0);
1314                 handle = NULL;
1315                 acc_mode = 0;           /* Don't check for permissions */
1316         } else {
1317                 acc_mode = accmode(dchild->d_inode, rec->ur_flags);
1318                 /* Child previously existed so the lookup and lock is already
1319                  * done, so no further locking is needed. */
1320                 /* for nfs and join - we need two locks for same fid, but
1321                  * with different mode */
1322                 if (need_open_lock && !use_parent)  {
1323                         ldlm_reply_set_disposition(rep, DISP_OPEN_LOCK);
1324                         need_open_lock = 0;
1325                 }
1326         }
1327
1328         LASSERTF(!mds_inode_is_orphan(dchild->d_inode),
1329                  "dchild %.*s (%p) inode %p/%lu/%u\n", dchild->d_name.len,
1330                  dchild->d_name.name, dchild, dchild->d_inode,
1331                  dchild->d_inode->i_ino, dchild->d_inode->i_generation);
1332
1333 found_child:
1334         mds_pack_inode2body(body, dchild->d_inode);
1335         if (!created && (rec->ur_flags & MDS_OPEN_CREAT) &&
1336             (rec->ur_flags & MDS_OPEN_EXCL)) {
1337                 /* File already exists, we didn't just create it, and we
1338                  * were passed O_EXCL; err-or. */
1339                 GOTO(cleanup, rc = -EEXIST); // returns a lock to the client
1340         }
1341
1342         /* if we are following special file, don't open */
1343         if (!S_ISREG(dchild->d_inode->i_mode) &&
1344             !S_ISDIR(dchild->d_inode->i_mode))
1345                 GOTO(cleanup_no_trans, rc = 0);
1346
1347         ldlm_reply_set_disposition(rep, DISP_OPEN_OPEN);
1348         if (S_ISREG(dchild->d_inode->i_mode)) {
1349                 /* Check permissions etc */
1350                 rc = ll_permission(dchild->d_inode, acc_mode, NULL);
1351                 if (rc != 0)
1352                         GOTO(cleanup, rc);
1353
1354                 if ((req->rq_export->exp_connect_flags & OBD_CONNECT_RDONLY) &&
1355                     (acc_mode & MAY_WRITE))
1356                         GOTO(cleanup, rc = -EROFS);
1357
1358                 /* An append-only file must be opened in append mode for
1359                  * writing */
1360                 if (IS_APPEND(dchild->d_inode) && (acc_mode & MAY_WRITE) != 0 &&
1361                     ((rec->ur_flags & MDS_OPEN_APPEND) == 0 ||
1362                      (rec->ur_flags & MDS_OPEN_TRUNC) != 0))
1363                         GOTO(cleanup, rc = -EPERM);
1364         } else {
1365                 if (S_ISDIR(dchild->d_inode->i_mode)) {
1366                         if (rec->ur_flags & MDS_OPEN_CREAT ||
1367                             rec->ur_flags & FMODE_WRITE) {
1368                                 /* we are trying to create or write a exist dir*/
1369                                 GOTO(cleanup, rc = -EISDIR);
1370                         }
1371                         if (rec->ur_flags & MDS_FMODE_EXEC) {
1372                                 /* we are trying to exec a directory */
1373                                 GOTO(cleanup, rc = -EACCES);
1374                         }
1375                         if (ll_permission(dchild->d_inode, acc_mode, NULL))
1376                                 GOTO(cleanup, rc = -EACCES);
1377                 } else if (rec->ur_flags & MDS_OPEN_DIRECTORY) {
1378                         GOTO(cleanup, rc = -ENOTDIR);
1379                 }
1380         }
1381
1382         if (OBD_FAIL_CHECK(OBD_FAIL_MDS_OPEN_CREATE)) {
1383                 obd_fail_loc = OBD_FAIL_LDLM_REPLY | OBD_FAIL_ONCE;
1384                 GOTO(cleanup, rc = -EAGAIN);
1385         }
1386
1387         if (need_open_lock) {
1388                 rc = mds_get_open_lock(obd, dchild, child_mode, child_lockh, rep);
1389                 if (rc != ELDLM_OK)
1390                         GOTO(cleanup, rc);
1391         }
1392
1393         if (!S_ISREG(dchild->d_inode->i_mode) &&
1394             !S_ISDIR(dchild->d_inode->i_mode) &&
1395             (req->rq_export->exp_connect_flags & OBD_CONNECT_NODEVOH)) {
1396                 /* If client supports this, do not return open handle for
1397                  * special device nodes */
1398                 GOTO(cleanup_no_trans, rc = 0);
1399         }
1400
1401         /* Step 5: mds_open it */
1402         rc = mds_finish_open(req, dchild, body, rec->ur_flags, &handle, rec,
1403                              rep, &parent_lockh);
1404         GOTO(cleanup, rc);
1405
1406  cleanup:
1407         inodes[0] = (!created || IS_ERR(dparent)) ? NULL : dparent->d_inode;
1408         inodes[1] = (created && dchild) ? dchild->d_inode : NULL;
1409         rc = mds_finish_transno(mds, inodes, handle, req, rc,
1410                                 rep ? rep->lock_policy_res1 : 0, 0);
1411
1412  cleanup_no_trans:
1413         if (quota_pending[0] || quota_pending[1])
1414                 lquota_pending_commit(mds_quota_interface_ref, obd,
1415                                       ids[0], ids[1], quota_pending);
1416         switch (cleanup_phase) {
1417         case 2:
1418                 if (rc && created) {
1419                         int err;
1420                         LOCK_INODE_MUTEX(dparent->d_inode);
1421                         err = ll_vfs_unlink(dparent->d_inode, dchild,
1422                                             mds->mds_vfsmnt);
1423                         UNLOCK_INODE_MUTEX(dparent->d_inode);
1424                         if (err) {
1425                                 CERROR("unlink(%.*s) in error path: %d\n",
1426                                        dchild->d_name.len, dchild->d_name.name,
1427                                        err);
1428                         }
1429                 } else if (created) {
1430                         mds_lock_new_child(obd, dchild->d_inode, NULL);
1431                         /* save uid/gid for quota acquire/release */
1432                         qpids[USRQUOTA] = dparent->d_inode->i_uid;
1433                         qpids[GRPQUOTA] = dparent->d_inode->i_gid;
1434                 }
1435         case 1:
1436                 if (dchild) {
1437                         l_dput(dchild);
1438                         /* It is safe to leave IT_OPEN_LOCK set, if rc is not 0,
1439                          * mds_intent_policy won't try to return any locks */
1440                         if (rc && child_lockh->cookie)
1441                                 ldlm_lock_decref(child_lockh, child_mode);
1442                 }
1443                 if (dparent == NULL)
1444                         break;
1445
1446                 l_dput(dparent);
1447                 if (rc || !created)
1448                         ldlm_lock_decref(&parent_lockh, parent_mode);
1449                 else
1450                         ptlrpc_save_lock(req, &parent_lockh, parent_mode);
1451         }
1452         /* trigger dqacq on the owner of child and parent */
1453         lquota_adjust(mds_quota_interface_ref, obd, qcids, qpids, rc,
1454                       FSFILT_OP_CREATE);
1455
1456         RETURN(rc);
1457 }
1458
1459 /* Close a "file descriptor" and possibly unlink an orphan from the
1460  * PENDING directory.  Caller must hold child->i_mutex, this drops it.
1461  *
1462  * If we are being called from mds_disconnect() because the client has
1463  * disappeared, then req == NULL and we do not update last_rcvd because
1464  * there is nothing that could be recovered by the client at this stage
1465  * (it will not even _have_ an entry in last_rcvd anymore). */
1466 int mds_mfd_close(struct ptlrpc_request *req, int offset,
1467                   struct obd_device *obd, struct mds_file_data *mfd,
1468                   int unlink_orphan, struct lov_mds_md *lmm, int lmm_size,
1469                   struct llog_cookie *logcookies, int cookies_size,
1470                   __u64 *valid)
1471 {
1472         struct inode *inode = mfd->mfd_dentry->d_inode;
1473         char fidname[LL_FID_NAMELEN];
1474         int last_orphan, fidlen, rc = 0, cleanup_phase = 0;
1475         struct dentry *pending_child = NULL;
1476         struct mds_obd *mds = &obd->u.mds;
1477         struct inode *pending_dir = mds->mds_pending_dir->d_inode;
1478         void *handle = NULL;
1479         struct mds_body *request_body = NULL, *reply_body = NULL;
1480         struct lvfs_dentry_params dp = LVFS_DENTRY_PARAMS_INIT;
1481         struct iattr iattr = { 0 };
1482         ENTRY;
1483
1484         if (req && req->rq_reqmsg != NULL)
1485                 request_body = lustre_msg_buf(req->rq_reqmsg, offset,
1486                                               sizeof(*request_body));
1487         if (req && req->rq_repmsg != NULL)
1488                 reply_body = lustre_msg_buf(req->rq_repmsg, REPLY_REC_OFF,
1489                                             sizeof(*reply_body));
1490
1491         fidlen = ll_fid2str(fidname, inode->i_ino, inode->i_generation);
1492
1493         CDEBUG(D_INODE, "inode %p ino %s nlink %d orphan %d\n", inode, fidname,
1494                inode->i_nlink, mds_orphan_open_count(inode));
1495
1496         last_orphan = (mds_orphan_open_dec_test(inode) &&
1497                        mds_inode_is_orphan(inode) &&
1498                        !obd->obd_recovering);
1499
1500         /* this is half of the actual "close" */
1501         if (mfd->mfd_mode & FMODE_WRITE) {
1502                 rc = mds_put_write_access(mds, inode, request_body,
1503                                           last_orphan && unlink_orphan);
1504         } else if (mfd->mfd_mode & MDS_FMODE_EXEC) {
1505                 mds_allow_write_access(inode);
1506         }
1507         /* here writecount change also needs protection from orphan write sem.
1508          * so drop orphan write sem after mds_put_write_access, bz 12888. */
1509         MDS_UP_WRITE_ORPHAN_SEM(inode);
1510
1511         if (last_orphan && unlink_orphan) {
1512                 int stripe_count = 0;
1513                 /* mds_put_write_access must have succeeded */
1514                 LASSERTF(rc == 0, "inode %lu/%u: rc %d",
1515                          inode->i_ino, inode->i_generation, rc);
1516
1517                 CDEBUG(D_INODE, "destroying orphan object %s\n", fidname);
1518
1519                 if ((S_ISREG(inode->i_mode) && inode->i_nlink != 1) ||
1520                     (S_ISDIR(inode->i_mode) && inode->i_nlink > 2))
1521                         CERROR("found \"orphan\" %s %s with link count %d\n",
1522                                S_ISREG(inode->i_mode) ? "file" : "dir",
1523                                fidname, inode->i_nlink);
1524
1525                 /* Sadly, there is no easy way to save pending_child from
1526                  * mds_reint_unlink() into mfd, so we need to re-lookup,
1527                  * but normally it will still be in the dcache. */
1528                 LOCK_INODE_MUTEX(pending_dir);
1529                 cleanup_phase = 1; /* UNLOCK_INODE_MUTEX(pending_dir) when finished */
1530                 pending_child = lookup_one_len(fidname, mds->mds_pending_dir,
1531                                                fidlen);
1532                 if (IS_ERR(pending_child))
1533                         GOTO(cleanup, rc = PTR_ERR(pending_child));
1534                 LASSERT(pending_child->d_inode != NULL);
1535
1536                 cleanup_phase = 2; /* dput(pending_child) when finished */
1537                 if (S_ISDIR(pending_child->d_inode->i_mode)) {
1538                         rc = ll_vfs_rmdir(pending_dir, pending_child,
1539                                           mds->mds_vfsmnt);
1540                         if (rc)
1541                                 CERROR("error unlinking orphan dir %s: rc %d\n",
1542                                        fidname,rc);
1543                         goto out;
1544                 }
1545
1546                 if (lmm != NULL) {
1547                         stripe_count = le32_to_cpu(lmm->lmm_stripe_count);
1548                 }
1549
1550                 handle = fsfilt_start_log(obd, pending_dir, FSFILT_OP_UNLINK,
1551                                           NULL, stripe_count);
1552                 if (IS_ERR(handle)) {
1553                         rc = PTR_ERR(handle);
1554                         handle = NULL;
1555                         GOTO(cleanup, rc);
1556                 }
1557                 if (lmm != NULL && (*valid & OBD_MD_FLEASIZE) &&
1558                     mds_log_op_unlink(obd, lmm, lmm_size,
1559                                       logcookies, cookies_size) > 0) {
1560                         *valid |= OBD_MD_FLCOOKIE;
1561                 }
1562
1563                 dp.ldp_inum = 0;
1564                 dp.ldp_ptr = req;
1565                 pending_child->d_fsdata = (void *) &dp;
1566                 rc = ll_vfs_unlink(pending_dir, pending_child, mds->mds_vfsmnt);
1567                 if (rc)
1568                         CERROR("error unlinking orphan %s: rc %d\n",fidname,rc);
1569
1570                 goto out; /* Don't bother updating attrs on unlinked inode */
1571         }
1572
1573         if (request_body != NULL) {
1574                 /* Only start a transaction to write out only the atime if it
1575                  * is more out-of-date than the specified limit.  If we are
1576                  * already going to write out the atime then do it anyway. */
1577                 if ((request_body->valid & OBD_MD_FLATIME) &&
1578                     ((request_body->atime > LTIME_S(inode->i_atime) +
1579                       mds->mds_atime_diff) )) {
1580                         LTIME_S(iattr.ia_atime) = request_body->atime;
1581                         iattr.ia_valid |= ATTR_ATIME;
1582                 }
1583
1584                 /* Store a rough estimate of the file size on the MDS for
1585                  * tools like e2scan and HSM that are just using this for *
1586                  * rough decision making and will get the proper size later.
1587                  * * This is NOT guaranteed to be correct with multiple *
1588                  * writers, but is only needed until SOM is done. b=11063 */
1589                 if (S_ISREG(inode->i_mode) &&
1590                     (request_body->valid & OBD_MD_FLSIZE) &&
1591                     (iattr.ia_valid != 0)) {
1592                         iattr.ia_size = request_body->size;
1593                         iattr.ia_valid |= ATTR_SIZE;
1594                 }
1595         }
1596
1597         if (iattr.ia_valid != 0) {
1598                 handle = fsfilt_start(obd, inode, FSFILT_OP_SETATTR, NULL);
1599                 if (IS_ERR(handle)) {
1600                         rc = PTR_ERR(handle);
1601                         handle = NULL;
1602                         GOTO(cleanup, rc);
1603                 }
1604                 rc = fsfilt_setattr(obd, mfd->mfd_dentry, handle, &iattr, 0);
1605                 if (rc)
1606                         CERROR("error in setattr(%s): rc %d\n", fidname, rc);
1607         }
1608 out:
1609         /* If other clients have this file open for write, rc will be > 0 */
1610         if (rc > 0)
1611                 rc = 0;
1612
1613  cleanup:
1614         l_dput(mfd->mfd_dentry);
1615         mds_mfd_put(mfd);
1616         if (req != NULL && reply_body != NULL) {
1617                 rc = mds_finish_transno(mds, NULL, handle, req, rc, 0, 0);
1618         } else if (handle) {
1619                 int err = fsfilt_commit(obd, pending_dir, handle, 0);
1620                 if (err) {
1621                         CERROR("error committing close: %d\n", err);
1622                         if (!rc)
1623                                 rc = err;
1624                 }
1625         }
1626
1627         switch (cleanup_phase) {
1628         case 2:
1629                 dput(pending_child);
1630         case 1:
1631                 UNLOCK_INODE_MUTEX(pending_dir);
1632         }
1633         RETURN(rc);
1634 }
1635
1636 int mds_close(struct ptlrpc_request *req, int offset)
1637 {
1638         struct mds_export_data *med = &req->rq_export->exp_mds_data;
1639         struct obd_device *obd = req->rq_export->exp_obd;
1640         struct mds_body *body;
1641         struct mds_file_data *mfd;
1642         struct lvfs_run_ctxt saved;
1643         struct inode *inode;
1644         int rc, repsize[4] = { sizeof(struct ptlrpc_body),
1645                                sizeof(struct mds_body),
1646                                obd->u.mds.mds_max_mdsize,
1647                                obd->u.mds.mds_max_cookiesize };
1648         struct mds_body *reply_body;
1649         struct lov_mds_md *lmm;
1650         int lmm_size;
1651         struct llog_cookie *logcookies;
1652         int cookies_size;
1653         ENTRY;
1654
1655         body = lustre_swab_reqbuf(req, offset, sizeof(*body),
1656                                   lustre_swab_mds_body);
1657         if (body == NULL) {
1658                 CERROR("Can't unpack body\n");
1659                 req->rq_status = -EFAULT;
1660                 GOTO(cleanup, rc = -EFAULT);
1661         }
1662         /*XXX need indicase - close is need to return LOV EA */
1663         body->valid |= OBD_MD_FLEASIZE;
1664
1665         rc = lustre_pack_reply(req, 4, repsize, NULL);
1666         if (rc)
1667                 req->rq_status = rc;
1668                 /* continue on to drop local open even if we can't send reply */
1669         else
1670                 MDS_CHECK_RESENT(req, mds_reconstruct_generic(req));
1671
1672         CDEBUG(D_INODE, "close req->rep_len %d mdsize %d cookiesize %d\n",
1673                req->rq_replen,
1674                obd->u.mds.mds_max_mdsize, obd->u.mds.mds_max_cookiesize);
1675         mds_counter_incr(req->rq_export, LPROC_MDS_CLOSE);
1676
1677         if (body->flags & MDS_BFLAG_UNCOMMITTED_WRITES)
1678                 /* do some stuff */ ;
1679
1680         spin_lock(&med->med_open_lock);
1681         mfd = mds_handle2mfd(&body->handle);
1682         if (mfd == NULL) {
1683                 spin_unlock(&med->med_open_lock);
1684                 DEBUG_REQ(D_ERROR, req, "no handle for file close ino "LPD64
1685                           ": cookie "LPX64, body->fid1.id, body->handle.cookie);
1686                 req->rq_status = -ESTALE;
1687                 GOTO(cleanup, rc = -ESTALE);
1688         }
1689         /* Remove mfd handle so it can't be found again.  We consume mfd_list
1690          * reference here, but still have mds_handle2mfd ref until mfd_close. */
1691         mds_mfd_unlink(mfd, 1);
1692         spin_unlock(&med->med_open_lock);
1693
1694         inode = mfd->mfd_dentry->d_inode;
1695         /* child orphan sem protects orphan_dec_test && is_orphan race */
1696         MDS_DOWN_WRITE_ORPHAN_SEM(inode); /* mds_mfd_close drops this */
1697         if (!obd->obd_recovering &&
1698             mds_inode_is_orphan(inode) && mds_orphan_open_count(inode) == 1) {
1699                 body = lustre_msg_buf(req->rq_repmsg, REPLY_REC_OFF,
1700                                       sizeof(*body));
1701                 LASSERT(body != NULL);
1702
1703                 mds_pack_inode2body(body, inode);
1704                 mds_pack_md(obd, req->rq_repmsg, REPLY_REC_OFF + 1, body, inode,
1705                             MDS_PACK_MD_LOCK, 0,
1706                             req->rq_export->exp_connect_flags);
1707         }
1708
1709         push_ctxt(&saved, &obd->obd_lvfs_ctxt, NULL);
1710         reply_body = lustre_msg_buf(req->rq_repmsg, REPLY_REC_OFF, sizeof(*reply_body));
1711         lmm = lustre_msg_buf(req->rq_repmsg, REPLY_REC_OFF + 1, 0);
1712         lmm_size = lustre_msg_buflen(req->rq_repmsg, REPLY_REC_OFF + 1),
1713         logcookies = lustre_msg_buf(req->rq_repmsg, REPLY_REC_OFF + 2, 0);
1714         cookies_size = lustre_msg_buflen(req->rq_repmsg, REPLY_REC_OFF + 2);
1715         req->rq_status = mds_mfd_close(req, offset, obd, mfd, 1,
1716                                        lmm, lmm_size, logcookies, cookies_size,
1717                                        &reply_body->valid);
1718         pop_ctxt(&saved, &obd->obd_lvfs_ctxt, NULL);
1719
1720 cleanup:
1721         if (OBD_FAIL_CHECK(OBD_FAIL_MDS_CLOSE_PACK)) {
1722                 CERROR("test case OBD_FAIL_MDS_CLOSE_PACK\n");
1723                 req->rq_status = -ENOMEM;
1724                 RETURN(-ENOMEM);
1725         }
1726
1727         RETURN(rc);
1728 }
1729
1730 int mds_done_writing(struct ptlrpc_request *req, int offset)
1731 {
1732         struct mds_body *body;
1733         int rc, size[2] = { sizeof(struct ptlrpc_body),
1734                             sizeof(struct mds_body) };
1735         ENTRY;
1736
1737         MDS_CHECK_RESENT(req, mds_reconstruct_generic(req));
1738
1739         body = lustre_swab_reqbuf(req, offset, sizeof(*body),
1740                                   lustre_swab_mds_body);
1741         if (body == NULL) {
1742                 CERROR("Can't unpack body\n");
1743                 req->rq_status = -EFAULT;
1744                 RETURN(-EFAULT);
1745         }
1746
1747         rc = lustre_pack_reply(req, 2, size, NULL);
1748         if (rc)
1749                 req->rq_status = rc;
1750
1751         RETURN(0);
1752 }