Whamcloud - gitweb
LU-1403 ucred: ucred cleanup
[fs/lustre-release.git] / lustre / mdt / mdt_open.c
1 /*
2  * GPL HEADER START
3  *
4  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
5  *
6  * This program is free software; you can redistribute it and/or modify
7  * it under the terms of the GNU General Public License version 2 only,
8  * as published by the Free Software Foundation.
9  *
10  * This program is distributed in the hope that it will be useful, but
11  * WITHOUT ANY WARRANTY; without even the implied warranty of
12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
13  * General Public License version 2 for more details (a copy is included
14  * in the LICENSE file that accompanied this code).
15  *
16  * You should have received a copy of the GNU General Public License
17  * version 2 along with this program; If not, see
18  * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
19  *
20  * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
21  * CA 95054 USA or visit www.sun.com if you need additional information or
22  * have any questions.
23  *
24  * GPL HEADER END
25  */
26 /*
27  * Copyright (c) 2007, 2010, Oracle and/or its affiliates. All rights reserved.
28  * Use is subject to license terms.
29  *
30  * Copyright (c) 2011, 2012, Whamcloud, Inc.
31  */
32 /*
33  * This file is part of Lustre, http://www.lustre.org/
34  * Lustre is a trademark of Sun Microsystems, Inc.
35  *
36  * lustre/mdt/mdt_open.c
37  *
38  * Lustre Metadata Target (mdt) open/close file handling
39  *
40  * Author: Huang Hua <huanghua@clusterfs.com>
41  */
42
43 #define DEBUG_SUBSYSTEM S_MDS
44
45 #include <lustre_acl.h>
46 #include <lustre_mds.h>
47 #include "mdt_internal.h"
48
49 /* we do nothing because we do not have refcount now */
50 static void mdt_mfd_get(void *mfdp)
51 {
52 }
53
54 static struct portals_handle_ops mfd_handle_ops = {
55         .hop_addref = mdt_mfd_get,
56         .hop_free   = NULL,
57 };
58
59 /* Create a new mdt_file_data struct, initialize it,
60  * and insert it to global hash table */
61 struct mdt_file_data *mdt_mfd_new(void)
62 {
63         struct mdt_file_data *mfd;
64         ENTRY;
65
66         OBD_ALLOC_PTR(mfd);
67         if (mfd != NULL) {
68                 CFS_INIT_LIST_HEAD(&mfd->mfd_handle.h_link);
69                 CFS_INIT_LIST_HEAD(&mfd->mfd_list);
70                 class_handle_hash(&mfd->mfd_handle, &mfd_handle_ops);
71         }
72         RETURN(mfd);
73 }
74
75 /*
76  * Find the mfd pointed to by handle in global hash table.
77  * In case of replay the handle is obsoleted
78  * but mfd can be found in mfd list by that handle
79  */
80 struct mdt_file_data *mdt_handle2mfd(struct mdt_thread_info *info,
81                                      const struct lustre_handle *handle)
82 {
83         struct ptlrpc_request *req = mdt_info_req(info);
84         struct mdt_file_data  *mfd;
85         ENTRY;
86
87         LASSERT(handle != NULL);
88         mfd = class_handle2object(handle->cookie);
89         /* during dw/setattr replay the mfd can be found by old handle */
90         if (mfd == NULL && req_is_replay(req)) {
91                 struct mdt_export_data *med = &req->rq_export->exp_mdt_data;
92                 cfs_list_for_each_entry(mfd, &med->med_open_head, mfd_list) {
93                         if (mfd->mfd_old_handle.cookie == handle->cookie)
94                                 RETURN (mfd);
95                 }
96                 mfd = NULL;
97         }
98         RETURN (mfd);
99 }
100
101 /* free mfd */
102 void mdt_mfd_free(struct mdt_file_data *mfd)
103 {
104         LASSERT(cfs_list_empty(&mfd->mfd_list));
105         OBD_FREE_RCU(mfd, sizeof *mfd, &mfd->mfd_handle);
106 }
107
108 static int mdt_create_data(struct mdt_thread_info *info,
109                            struct mdt_object *p, struct mdt_object *o)
110 {
111         struct md_op_spec     *spec = &info->mti_spec;
112         struct md_attr        *ma   = &info->mti_attr;
113         int                    rc   = 0;
114         ENTRY;
115
116         if (!md_should_create(spec->sp_cr_flags))
117                 RETURN(0);
118
119         ma->ma_need = MA_INODE | MA_LOV;
120         ma->ma_valid = 0;
121         mutex_lock(&o->mot_lov_mutex);
122         if (!(o->mot_flags & MOF_LOV_CREATED)) {
123                 rc = mdo_create_data(info->mti_env,
124                                      p ? mdt_object_child(p) : NULL,
125                                      mdt_object_child(o), spec, ma);
126                 if (rc == 0)
127                         rc = mdt_attr_get_complex(info, o, ma);
128
129                 if (rc == 0 && ma->ma_valid & MA_LOV)
130                         o->mot_flags |= MOF_LOV_CREATED;
131         }
132         mutex_unlock(&o->mot_lov_mutex);
133         RETURN(rc);
134 }
135
136 static int mdt_ioepoch_opened(struct mdt_object *mo)
137 {
138         return mo->mot_ioepoch_count;
139 }
140
141 int mdt_object_is_som_enabled(struct mdt_object *mo)
142 {
143         return !mo->mot_ioepoch;
144 }
145
146 /**
147  * Re-enable Size-on-MDS.
148  * Call under ->mot_ioepoch_mutex.
149  */
150 static void mdt_object_som_enable(struct mdt_object *mo, __u64 ioepoch)
151 {
152         if (ioepoch == mo->mot_ioepoch) {
153                 LASSERT(!mdt_ioepoch_opened(mo));
154                 mo->mot_ioepoch = 0;
155                 mo->mot_flags = 0;
156         }
157 }
158
159 /**
160  * Open the IOEpoch. It is allowed if @writecount is not negative.
161  * The epoch and writecount handling is performed under the mot_ioepoch_mutex.
162  */
163 int mdt_ioepoch_open(struct mdt_thread_info *info, struct mdt_object *o,
164                      int created)
165 {
166         struct mdt_device *mdt = info->mti_mdt;
167         int cancel = 0;
168         int rc = 0;
169         ENTRY;
170
171         if (!(mdt_conn_flags(info) & OBD_CONNECT_SOM) ||
172             !S_ISREG(lu_object_attr(&o->mot_obj.mo_lu)))
173                 RETURN(0);
174
175         mutex_lock(&o->mot_ioepoch_mutex);
176         if (mdt_ioepoch_opened(o)) {
177                 /* Epoch continues even if there is no writers yet. */
178                 CDEBUG(D_INODE, "continue epoch "LPU64" for "DFID"\n",
179                        o->mot_ioepoch, PFID(mdt_object_fid(o)));
180         } else {
181                 /* XXX: ->mdt_ioepoch is not initialized at the mount */
182                 spin_lock(&mdt->mdt_ioepoch_lock);
183                 if (mdt->mdt_ioepoch < info->mti_replayepoch)
184                         mdt->mdt_ioepoch = info->mti_replayepoch;
185
186                 if (info->mti_replayepoch)
187                         o->mot_ioepoch = info->mti_replayepoch;
188                 else if (++mdt->mdt_ioepoch == IOEPOCH_INVAL)
189                         o->mot_ioepoch = ++mdt->mdt_ioepoch;
190                 else
191                         o->mot_ioepoch = mdt->mdt_ioepoch;
192
193                 spin_unlock(&mdt->mdt_ioepoch_lock);
194
195                 CDEBUG(D_INODE, "starting epoch "LPU64" for "DFID"\n",
196                        o->mot_ioepoch, PFID(mdt_object_fid(o)));
197                 if (created)
198                         o->mot_flags |= MOF_SOM_CREATED;
199                 cancel = 1;
200         }
201         o->mot_ioepoch_count++;
202         mutex_unlock(&o->mot_ioepoch_mutex);
203
204         /* Cancel Size-on-MDS attributes cached on clients for the open case.
205          * In the truncate case, see mdt_reint_setattr(). */
206         if (cancel && (info->mti_rr.rr_fid1 != NULL)) {
207                 struct mdt_lock_handle  *lh = &info->mti_lh[MDT_LH_CHILD];
208                 mdt_lock_reg_init(lh, LCK_EX);
209                 rc = mdt_object_lock(info, o, lh, MDS_INODELOCK_UPDATE,
210                                      MDT_LOCAL_LOCK);
211                 if (rc == 0)
212                         mdt_object_unlock(info, o, lh, 1);
213         }
214         RETURN(rc);
215 }
216
217 /**
218  * Update SOM on-disk attributes.
219  * If enabling, write update inodes and lustre-ea with the proper IOEpoch,
220  * mountid and attributes. If disabling, zero IOEpoch id in lustre-ea.
221  * Call under ->mot_ioepoch_mutex.
222  */
223 static int mdt_som_attr_set(struct mdt_thread_info *info,
224                             struct mdt_object *obj, __u64 ioepoch, int enable)
225 {
226         struct lustre_mdt_attrs *lma;
227         struct md_attr          *ma = &info->mti_attr;
228         struct lu_buf           *buf = &info->mti_buf;
229         struct md_object        *next = mdt_object_child(obj);
230         struct mdt_device       *mdt = info->mti_mdt;
231         struct lu_attr          *la = &ma->ma_attr;
232         int                      rc;
233         ENTRY;
234
235         CDEBUG(D_INODE, "Size-on-MDS attribute %s for epoch "LPU64
236                " on "DFID".\n", enable ? "update" : "disabling",
237                ioepoch, PFID(mdt_object_fid(obj)));
238
239         lma = (struct lustre_mdt_attrs *) info->mti_xattr_buf;
240         CLASSERT(sizeof(info->mti_xattr_buf) >= sizeof(*lma));
241
242         buf->lb_buf = lma;
243         buf->lb_len = sizeof(info->mti_xattr_buf);
244         rc = mo_xattr_get(info->mti_env, next, buf, XATTR_NAME_LMA);
245         if (rc > 0) {
246                 lustre_lma_swab(lma);
247         } else if (rc == -ENODATA) {
248                 memset(lma, 0, sizeof(*lma));
249         } else {
250                 RETURN(rc);
251         }
252
253         /* Copy FID */
254         memcpy(&lma->lma_self_fid, mdt_object_fid(obj), sizeof(lma->lma_self_fid));
255
256         /* Copy SOM data */
257         lma->lma_ioepoch     = ioepoch;
258         lma->lma_som_size    = la->la_valid & LA_SIZE ? la->la_size : 0;
259         lma->lma_som_blocks  = la->la_valid & LA_BLOCKS ?  la->la_blocks : 0;
260         lma->lma_som_mountid = mdt->mdt_lut.lut_obd->u.obt.obt_mount_count;
261         if (enable)
262                 lma->lma_compat |= LMAC_SOM;
263         else
264                 lma->lma_compat &= ~LMAC_SOM;
265
266         rc = mo_xattr_set(info->mti_env, next, buf, XATTR_NAME_LMA, 0);
267
268         RETURN(rc);
269 }
270
271 /** Perform the eviction specific actions on ioepoch close. */
272 static inline int mdt_ioepoch_close_on_eviction(struct mdt_thread_info *info,
273                                                 struct mdt_object *o)
274 {
275         int rc = 0;
276
277         mutex_lock(&o->mot_ioepoch_mutex);
278         CDEBUG(D_INODE, "Eviction. Closing IOepoch "LPU64" on "DFID". "
279                "Count %d\n", o->mot_ioepoch, PFID(mdt_object_fid(o)),
280                o->mot_ioepoch_count);
281         o->mot_ioepoch_count--;
282
283         /* If eviction occured set MOF_SOM_RECOV,
284          * if no other epoch holders, disable SOM on disk. */
285         o->mot_flags |= MOF_SOM_CHANGE | MOF_SOM_RECOV;
286         if (!mdt_ioepoch_opened(o)) {
287                 rc = mdt_som_attr_set(info, o, o->mot_ioepoch, MDT_SOM_DISABLE);
288                 mdt_object_som_enable(o, o->mot_ioepoch);
289         }
290         mutex_unlock(&o->mot_ioepoch_mutex);
291         RETURN(rc);
292 }
293
294 /**
295  * Perform the replay specific actions on ioepoch close.
296  * Skip SOM attribute update if obtained and just forget about the inode state
297  * for the last ioepoch holder. The SOM cache is invalidated on MDS failure.
298  */
299 static inline int mdt_ioepoch_close_on_replay(struct mdt_thread_info *info,
300                                               struct mdt_object *o)
301 {
302         int rc = MDT_IOEPOCH_CLOSED;
303         ENTRY;
304
305         mutex_lock(&o->mot_ioepoch_mutex);
306         CDEBUG(D_INODE, "Replay. Closing epoch "LPU64" on "DFID". Count %d\n",
307                o->mot_ioepoch, PFID(mdt_object_fid(o)), o->mot_ioepoch_count);
308         o->mot_ioepoch_count--;
309
310         /* Get an info from the replayed request if client is supposed
311          * to send an Attibute Update, reconstruct @rc if so */
312         if (info->mti_ioepoch->flags & MF_SOM_AU)
313                 rc = MDT_IOEPOCH_GETATTR;
314
315         if (!mdt_ioepoch_opened(o))
316                 mdt_object_som_enable(o, info->mti_ioepoch->ioepoch);
317         mutex_unlock(&o->mot_ioepoch_mutex);
318
319         RETURN(rc);
320 }
321
322 /**
323  * Regular file IOepoch close.
324  * Closes the ioepoch, checks the object state, apply obtained attributes and
325  * re-enable SOM on the object, if possible. Also checks if the recovery is
326  * needed and packs OBD_MD_FLGETATTRLOCK flag into the reply to force the client
327  * to obtain SOM attributes under the server-side OST locks.
328  *
329  * Return value:
330  * MDT_IOEPOCH_CLOSED if ioepoch is closed.
331  * MDT_IOEPOCH_GETATTR if ioepoch is closed but another SOM update is needed.
332  */
333 static inline int mdt_ioepoch_close_reg(struct mdt_thread_info *info,
334                                         struct mdt_object *o)
335 {
336         struct md_attr *tmp_ma;
337         struct lu_attr *la;
338         int achange, opened;
339         int recovery = 0;
340         int rc = 0, ret = MDT_IOEPOCH_CLOSED;
341         ENTRY;
342
343         la = &info->mti_attr.ma_attr;
344         achange = (info->mti_ioepoch->flags & MF_SOM_CHANGE);
345
346         mutex_lock(&o->mot_ioepoch_mutex);
347         o->mot_ioepoch_count--;
348
349         tmp_ma = &info->mti_u.som.attr;
350         tmp_ma->ma_lmm = info->mti_attr.ma_lmm;
351         tmp_ma->ma_lmm_size = info->mti_attr.ma_lmm_size;
352         tmp_ma->ma_som = &info->mti_u.som.data;
353         tmp_ma->ma_need = MA_INODE | MA_LOV | MA_SOM;
354         tmp_ma->ma_valid = 0;
355         rc = mdt_attr_get_complex(info, o, tmp_ma);
356         if (rc)
357                 GOTO(error_up, rc);
358
359         /* Check the on-disk SOM state. */
360         if (o->mot_flags & MOF_SOM_RECOV)
361                 recovery = 1;
362         else if (!(o->mot_flags & MOF_SOM_CREATED) &&
363                  !(tmp_ma->ma_valid & MA_SOM))
364                 recovery = 1;
365
366         CDEBUG(D_INODE, "Closing epoch "LPU64" on "DFID". Count %d\n",
367                o->mot_ioepoch, PFID(mdt_object_fid(o)), o->mot_ioepoch_count);
368
369         opened = mdt_ioepoch_opened(o);
370         /**
371          * If IOEpoch is not opened, check if a Size-on-MDS update is needed.
372          * Skip the check for file with no LOV  or for unlink files.
373          */
374         if (!opened && tmp_ma->ma_valid & MA_LOV &&
375             !(tmp_ma->ma_valid & MA_INODE && tmp_ma->ma_attr.la_nlink == 0)) {
376                 if (recovery)
377                         /* If some previous writer was evicted, re-ask the
378                          * client for attributes. Even if attributes are
379                          * provided, we cannot believe in them.
380                          * Another use case is that there is no SOM cache on
381                          * disk -- first access with SOM or there was an MDS
382                          * failure. */
383                         ret = MDT_IOEPOCH_GETATTR;
384                 else if (o->mot_flags & MOF_SOM_CHANGE)
385                         /* Some previous writer changed the attribute.
386                          * Do not believe to the current Size-on-MDS
387                          * update, re-ask client. */
388                         ret = MDT_IOEPOCH_GETATTR;
389                 else if (!(la->la_valid & LA_SIZE) && achange)
390                         /* Attributes were changed by the last writer
391                          * only but no Size-on-MDS update is received.*/
392                         ret = MDT_IOEPOCH_GETATTR;
393         }
394
395         if (achange || ret == MDT_IOEPOCH_GETATTR)
396                 o->mot_flags |= MOF_SOM_CHANGE;
397
398         /* If epoch ends and relable SOM attributes are obtained, update them.
399          * Create SOM ea for new files even if there is no attributes obtained
400          * (0-length file). */
401         if (ret == MDT_IOEPOCH_CLOSED && !opened) {
402                 if (achange || o->mot_flags & MOF_SOM_CREATED) {
403                         LASSERT(achange || !(la->la_valid & LA_SIZE));
404                         rc = mdt_som_attr_set(info, o, o->mot_ioepoch,
405                                               MDT_SOM_ENABLE);
406                         /* Avoid the following setattrs of these attributes,
407                          * e.g. for atime update. */
408                         info->mti_attr.ma_valid = 0;
409                 }
410                 mdt_object_som_enable(o, o->mot_ioepoch);
411         }
412
413         mutex_unlock(&o->mot_ioepoch_mutex);
414         /* If recovery is needed, tell the client to perform GETATTR under
415          * the lock. */
416         if (ret == MDT_IOEPOCH_GETATTR && recovery) {
417                 struct mdt_body *rep;
418                 rep = req_capsule_server_get(info->mti_pill, &RMF_MDT_BODY);
419                 rep->valid |= OBD_MD_FLGETATTRLOCK;
420         }
421
422         RETURN(rc ? : ret);
423
424 error_up:
425         mutex_unlock(&o->mot_ioepoch_mutex);
426         return rc;
427 }
428
429 /**
430  * Close IOEpoch (opened file or MDS_FMODE_EPOCH state). It happens if:
431  * - a client closes the IOEpoch;
432  * - a client eviction occured.
433  * Return values:
434  * MDT_IOEPOCH_OPENED if the client does not close IOEpoch.
435  * MDT_IOEPOCH_CLOSED if the client closes IOEpoch.
436  * MDT_IOEPOCH_GETATTR if the client closes IOEpoch but another SOM attribute
437  * update is needed.
438  */
439 static int mdt_ioepoch_close(struct mdt_thread_info *info, struct mdt_object *o)
440 {
441         struct ptlrpc_request *req = mdt_info_req(info);
442         ENTRY;
443
444         if (!(mdt_conn_flags(info) & OBD_CONNECT_SOM) ||
445             !S_ISREG(lu_object_attr(&o->mot_obj.mo_lu)))
446                 RETURN(0);
447
448         LASSERT(o->mot_ioepoch_count);
449         LASSERT(info->mti_ioepoch == NULL ||
450                 info->mti_ioepoch->ioepoch == o->mot_ioepoch);
451
452         /* IOEpoch is closed only if client tells about it or eviction occures.
453          * In the replay case, always close the epoch. */
454         if (req == NULL)
455                 RETURN(mdt_ioepoch_close_on_eviction(info, o));
456         if (lustre_msg_get_flags(req->rq_reqmsg) & MSG_REPLAY)
457                 RETURN(mdt_ioepoch_close_on_replay(info, o));
458         if (info->mti_ioepoch->flags & MF_EPOCH_CLOSE)
459                 RETURN(mdt_ioepoch_close_reg(info, o));
460         /* IO epoch is not closed. */
461         RETURN(MDT_IOEPOCH_OPENED);
462 }
463
464 /**
465  * Close MDS_FMODE_SOM state, when IOEpoch is already closed and we are waiting
466  * for attribute update. It happens if:
467  * - SOM Attribute Update is obtained;
468  * - the client failed to obtain it and informs MDS about it;
469  * - a client eviction occured.
470  * Apply obtained attributes for the 1st case, wipe out the on-disk SOM
471  * cache otherwise.
472  */
473 int mdt_som_au_close(struct mdt_thread_info *info, struct mdt_object *o)
474 {
475         struct ptlrpc_request *req = mdt_info_req(info);
476         __u64 ioepoch = 0;
477         int act = MDT_SOM_ENABLE;
478         int rc = 0;
479         ENTRY;
480
481         LASSERT(!req || info->mti_ioepoch);
482         if (!(mdt_conn_flags(info) & OBD_CONNECT_SOM) ||
483             !S_ISREG(lu_object_attr(&o->mot_obj.mo_lu)))
484                 RETURN(0);
485
486         /* No size whereas MF_SOM_CHANGE is set means client failed to
487          * obtain ost attributes, drop the SOM cache on disk if so. */
488         if (!req ||
489             (info->mti_ioepoch &&
490              info->mti_ioepoch->flags & MF_SOM_CHANGE &&
491              !(info->mti_attr.ma_attr.la_valid & LA_SIZE)))
492                 act = MDT_SOM_DISABLE;
493
494         mutex_lock(&o->mot_ioepoch_mutex);
495         /* Mark the object it is the recovery state if we failed to obtain
496          * SOM attributes. */
497         if (act == MDT_SOM_DISABLE)
498                 o->mot_flags |= MOF_SOM_RECOV;
499
500         if (!mdt_ioepoch_opened(o)) {
501                 ioepoch =  info->mti_ioepoch ?
502                         info->mti_ioepoch->ioepoch : o->mot_ioepoch;
503
504                 if (!(lustre_msg_get_flags(req->rq_reqmsg) & MSG_REPLAY))
505                         rc = mdt_som_attr_set(info, o, ioepoch, act);
506                 mdt_object_som_enable(o, ioepoch);
507         }
508         mutex_unlock(&o->mot_ioepoch_mutex);
509         RETURN(rc);
510 }
511
512 int mdt_write_read(struct mdt_object *o)
513 {
514         int rc = 0;
515         ENTRY;
516         mutex_lock(&o->mot_ioepoch_mutex);
517         rc = o->mot_writecount;
518         mutex_unlock(&o->mot_ioepoch_mutex);
519         RETURN(rc);
520 }
521
522 int mdt_write_get(struct mdt_object *o)
523 {
524         int rc = 0;
525         ENTRY;
526         mutex_lock(&o->mot_ioepoch_mutex);
527         if (o->mot_writecount < 0)
528                 rc = -ETXTBSY;
529         else
530                 o->mot_writecount++;
531         mutex_unlock(&o->mot_ioepoch_mutex);
532         RETURN(rc);
533 }
534
535 void mdt_write_put(struct mdt_object *o)
536 {
537         ENTRY;
538         mutex_lock(&o->mot_ioepoch_mutex);
539         o->mot_writecount--;
540         mutex_unlock(&o->mot_ioepoch_mutex);
541         EXIT;
542 }
543
544 static int mdt_write_deny(struct mdt_object *o)
545 {
546         int rc = 0;
547         ENTRY;
548         mutex_lock(&o->mot_ioepoch_mutex);
549         if (o->mot_writecount > 0)
550                 rc = -ETXTBSY;
551         else
552                 o->mot_writecount--;
553         mutex_unlock(&o->mot_ioepoch_mutex);
554         RETURN(rc);
555 }
556
557 static void mdt_write_allow(struct mdt_object *o)
558 {
559         ENTRY;
560         mutex_lock(&o->mot_ioepoch_mutex);
561         o->mot_writecount++;
562         mutex_unlock(&o->mot_ioepoch_mutex);
563         EXIT;
564 }
565
566 /* there can be no real transaction so prepare the fake one */
567 static void mdt_empty_transno(struct mdt_thread_info *info, int rc)
568 {
569         struct mdt_device      *mdt = info->mti_mdt;
570         struct ptlrpc_request  *req = mdt_info_req(info);
571         struct tg_export_data  *ted;
572         struct lsd_client_data *lcd;
573
574         ENTRY;
575         /* transaction has occurred already */
576         if (lustre_msg_get_transno(req->rq_repmsg) != 0)
577                 RETURN_EXIT;
578
579         spin_lock(&mdt->mdt_lut.lut_translock);
580         if (rc != 0) {
581                 if (info->mti_transno != 0) {
582                         struct obd_export *exp = req->rq_export;
583
584                         CERROR("%s: replay trans "LPU64" NID %s: rc = %d\n",
585                                 mdt->mdt_md_dev.md_lu_dev.ld_obd->obd_name,
586                                 info->mti_transno,
587                                 libcfs_nid2str(exp->exp_connection->c_peer.nid),
588                                 rc);
589                         RETURN_EXIT;
590                 }
591         } else if (info->mti_transno == 0) {
592                 info->mti_transno = ++mdt->mdt_lut.lut_last_transno;
593         } else {
594                 /* should be replay */
595                 if (info->mti_transno > mdt->mdt_lut.lut_last_transno)
596                         mdt->mdt_lut.lut_last_transno = info->mti_transno;
597         }
598         spin_unlock(&mdt->mdt_lut.lut_translock);
599
600         CDEBUG(D_INODE, "transno = "LPU64", last_committed = "LPU64"\n",
601                         info->mti_transno,
602                         req->rq_export->exp_obd->obd_last_committed);
603
604         req->rq_transno = info->mti_transno;
605         lustre_msg_set_transno(req->rq_repmsg, info->mti_transno);
606
607         /* update lcd in memory only for resent cases */
608         ted = &req->rq_export->exp_target_data;
609         LASSERT(ted);
610         mutex_lock(&ted->ted_lcd_lock);
611         lcd = ted->ted_lcd;
612         if (info->mti_transno < lcd->lcd_last_transno &&
613             info->mti_transno != 0) {
614                 /* This should happen during replay. Do not update
615                  * last rcvd info if replay req transno < last transno,
616                  * otherwise the following resend(after replay) can not
617                  * be checked correctly by xid */
618                 mutex_unlock(&ted->ted_lcd_lock);
619                 CDEBUG(D_HA, "%s: transno = "LPU64" < last_transno = "LPU64"\n",
620                         mdt->mdt_md_dev.md_lu_dev.ld_obd->obd_name,
621                         info->mti_transno, lcd->lcd_last_transno);
622                 RETURN_EXIT;
623         }
624
625         if (lustre_msg_get_opc(req->rq_reqmsg) == MDS_CLOSE ||
626             lustre_msg_get_opc(req->rq_reqmsg) == MDS_DONE_WRITING) {
627                 if (info->mti_transno != 0)
628                         lcd->lcd_last_close_transno = info->mti_transno;
629                 lcd->lcd_last_close_xid = req->rq_xid;
630                 lcd->lcd_last_close_result = rc;
631         } else {
632                 /* VBR: save versions in last_rcvd for reconstruct. */
633                 __u64 *pre_versions = lustre_msg_get_versions(req->rq_repmsg);
634                 if (pre_versions) {
635                         lcd->lcd_pre_versions[0] = pre_versions[0];
636                         lcd->lcd_pre_versions[1] = pre_versions[1];
637                         lcd->lcd_pre_versions[2] = pre_versions[2];
638                         lcd->lcd_pre_versions[3] = pre_versions[3];
639                 }
640                 if (info->mti_transno != 0)
641                         lcd->lcd_last_transno = info->mti_transno;
642
643                 lcd->lcd_last_xid = req->rq_xid;
644                 lcd->lcd_last_result = rc;
645                 lcd->lcd_last_data = info->mti_opdata;
646         }
647         mutex_unlock(&ted->ted_lcd_lock);
648
649         EXIT;
650 }
651
652 void mdt_mfd_set_mode(struct mdt_file_data *mfd, int mode)
653 {
654         LASSERT(mfd != NULL);
655
656         CDEBUG(D_HA, "Change mfd %p mode 0x%x->0x%x\n",
657                mfd, (unsigned int)mfd->mfd_mode, (unsigned int)mode);
658
659         mfd->mfd_mode = mode;
660 }
661
662 static int mdt_mfd_open(struct mdt_thread_info *info, struct mdt_object *p,
663                         struct mdt_object *o, __u64 flags, int created)
664 {
665         struct ptlrpc_request   *req = mdt_info_req(info);
666         struct mdt_export_data  *med = &req->rq_export->exp_mdt_data;
667         struct mdt_file_data    *mfd;
668         struct md_attr          *ma  = &info->mti_attr;
669         struct lu_attr          *la  = &ma->ma_attr;
670         struct mdt_body         *repbody;
671         int                      rc = 0, isdir, isreg;
672         ENTRY;
673
674         repbody = req_capsule_server_get(info->mti_pill, &RMF_MDT_BODY);
675
676         isreg = S_ISREG(la->la_mode);
677         isdir = S_ISDIR(la->la_mode);
678         if (isreg && !(ma->ma_valid & MA_LOV)) {
679                 /*
680                  * No EA, check whether it is will set regEA and dirEA since in
681                  * above attr get, these size might be zero, so reset it, to
682                  * retrieve the MD after create obj.
683                  */
684                 ma->ma_lmm_size = req_capsule_get_size(info->mti_pill,
685                                                        &RMF_MDT_MD,
686                                                        RCL_SERVER);
687                 /* in replay case, p == NULL */
688                 rc = mdt_create_data(info, p, o);
689                 if (rc)
690                         RETURN(rc);
691         }
692
693         CDEBUG(D_INODE, "after open, ma_valid bit = "LPX64" lmm_size = %d\n",
694                ma->ma_valid, ma->ma_lmm_size);
695
696         if (ma->ma_valid & MA_LOV) {
697                 LASSERT(ma->ma_lmm_size != 0);
698                 repbody->eadatasize = ma->ma_lmm_size;
699                 if (isdir)
700                         repbody->valid |= OBD_MD_FLDIREA;
701                 else
702                         repbody->valid |= OBD_MD_FLEASIZE;
703         }
704
705         if (flags & FMODE_WRITE) {
706                 rc = mdt_write_get(o);
707                 if (rc == 0) {
708                         mdt_ioepoch_open(info, o, created);
709                         repbody->ioepoch = o->mot_ioepoch;
710                 }
711         } else if (flags & MDS_FMODE_EXEC) {
712                 rc = mdt_write_deny(o);
713         }
714         if (rc)
715                 RETURN(rc);
716
717         rc = mo_open(info->mti_env, mdt_object_child(o),
718                      created ? flags | MDS_OPEN_CREATED : flags);
719         if (rc)
720                 GOTO(err_out, rc);
721
722         mfd = mdt_mfd_new();
723         if (mfd != NULL) {
724                 /*
725                  * Keep a reference on this object for this open, and is
726                  * released by mdt_mfd_close().
727                  */
728                 mdt_object_get(info->mti_env, o);
729
730                 /*
731                  * @flags is always not zero. At least it should be FMODE_READ,
732                  * FMODE_WRITE or MDS_FMODE_EXEC.
733                  */
734                 LASSERT(flags != 0);
735
736                 /* Open handling. */
737                 mdt_mfd_set_mode(mfd, flags);
738
739                 mfd->mfd_object = o;
740                 mfd->mfd_xid = req->rq_xid;
741
742                 /* replay handle */
743                 if (req_is_replay(req)) {
744                         struct mdt_file_data *old_mfd;
745                         /* Check wheather old cookie already exist in
746                          * the list, becasue when do recovery, client
747                          * might be disconnected from server, and
748                          * restart replay, so there maybe some orphan
749                          * mfd here, we should remove them */
750                         LASSERT(info->mti_rr.rr_handle != NULL);
751                         old_mfd = mdt_handle2mfd(info, info->mti_rr.rr_handle);
752                         if (old_mfd) {
753                                 CDEBUG(D_HA, "del orph mfd %p fid=("DFID") "
754                                        "cookie=" LPX64"\n", mfd,
755                                        PFID(mdt_object_fid(mfd->mfd_object)),
756                                        info->mti_rr.rr_handle->cookie);
757                                 spin_lock(&med->med_open_lock);
758                                 class_handle_unhash(&old_mfd->mfd_handle);
759                                 cfs_list_del_init(&old_mfd->mfd_list);
760                                 spin_unlock(&med->med_open_lock);
761                                 /* no attr update for that close */
762                                 la->la_valid = 0;
763                                 ma->ma_valid |= MA_FLAGS;
764                                 ma->ma_attr_flags |= MDS_RECOV_OPEN;
765                                 mdt_mfd_close(info, old_mfd);
766                                 ma->ma_attr_flags &= ~MDS_RECOV_OPEN;
767                                 ma->ma_valid &= ~MA_FLAGS;
768                         }
769                         CDEBUG(D_HA, "Store old cookie "LPX64" in new mfd\n",
770                                info->mti_rr.rr_handle->cookie);
771                         mfd->mfd_old_handle.cookie =
772                                                 info->mti_rr.rr_handle->cookie;
773                 }
774                 repbody->handle.cookie = mfd->mfd_handle.h_cookie;
775
776                 if (req->rq_export->exp_disconnected) {
777                         spin_lock(&med->med_open_lock);
778                         class_handle_unhash(&mfd->mfd_handle);
779                         cfs_list_del_init(&mfd->mfd_list);
780                         spin_unlock(&med->med_open_lock);
781                         mdt_mfd_close(info, mfd);
782                 } else {
783                         spin_lock(&med->med_open_lock);
784                         cfs_list_add(&mfd->mfd_list, &med->med_open_head);
785                         spin_unlock(&med->med_open_lock);
786                 }
787
788                 mdt_empty_transno(info, rc);
789         } else {
790                 GOTO(err_out, rc = -ENOMEM);
791         }
792
793         RETURN(rc);
794
795 err_out:
796         if (flags & FMODE_WRITE)
797                         /* XXX We also need to close io epoch here.
798                          * See LU-1220 - green */
799                 mdt_write_put(o);
800         else if (flags & FMODE_EXEC)
801                 mdt_write_allow(o);
802         return rc;
803 }
804
805 int mdt_finish_open(struct mdt_thread_info *info,
806                     struct mdt_object *p, struct mdt_object *o,
807                     __u64 flags, int created, struct ldlm_reply *rep)
808 {
809         struct ptlrpc_request   *req = mdt_info_req(info);
810         struct obd_export       *exp = req->rq_export;
811         struct mdt_export_data  *med = &req->rq_export->exp_mdt_data;
812         struct md_attr          *ma  = &info->mti_attr;
813         struct lu_attr          *la  = &ma->ma_attr;
814         struct mdt_file_data    *mfd;
815         struct mdt_body         *repbody;
816         int                      rc = 0;
817         int                      isreg, isdir, islnk;
818         cfs_list_t              *t;
819         ENTRY;
820
821         LASSERT(ma->ma_valid & MA_INODE);
822
823         repbody = req_capsule_server_get(info->mti_pill, &RMF_MDT_BODY);
824
825         isreg = S_ISREG(la->la_mode);
826         isdir = S_ISDIR(la->la_mode);
827         islnk = S_ISLNK(la->la_mode);
828         mdt_pack_attr2body(info, repbody, la, mdt_object_fid(o));
829
830         /* LU-2275, simulate broken behaviour (esp. prevalent in
831          * pre-2.4 servers where a very strange reply is sent on error
832          * that looks like it was actually almost succesful and a failure at the
833          * same time */
834         if (OBD_FAIL_CHECK(OBD_FAIL_MDS_NEGATIVE_POSITIVE)) {
835                 mdt_set_disposition(info, rep, DISP_OPEN_LOCK | \
836                                     DISP_OPEN_OPEN | DISP_LOOKUP_NEG | \
837                                     DISP_LOOKUP_POS);
838                 RETURN(-ENOENT);
839         }
840
841         if (exp_connect_rmtclient(exp)) {
842                 void *buf = req_capsule_server_get(info->mti_pill, &RMF_ACL);
843
844                 rc = mdt_pack_remote_perm(info, o, buf);
845                 if (rc) {
846                         repbody->valid &= ~OBD_MD_FLRMTPERM;
847                         repbody->aclsize = 0;
848                 } else {
849                         repbody->valid |= OBD_MD_FLRMTPERM;
850                         repbody->aclsize = sizeof(struct mdt_remote_perm);
851                 }
852         }
853 #ifdef CONFIG_FS_POSIX_ACL
854         else if (exp->exp_connect_flags & OBD_CONNECT_ACL) {
855                 const struct lu_env *env = info->mti_env;
856                 struct md_object *next = mdt_object_child(o);
857                 struct lu_buf *buf = &info->mti_buf;
858
859                 buf->lb_buf = req_capsule_server_get(info->mti_pill, &RMF_ACL);
860                 buf->lb_len = req_capsule_get_size(info->mti_pill, &RMF_ACL,
861                                                    RCL_SERVER);
862                 if (buf->lb_len > 0) {
863                         rc = mo_xattr_get(env, next, buf,
864                                           XATTR_NAME_ACL_ACCESS);
865                         if (rc < 0) {
866                                 if (rc == -ENODATA) {
867                                         repbody->aclsize = 0;
868                                         repbody->valid |= OBD_MD_FLACL;
869                                         rc = 0;
870                                 } else if (rc == -EOPNOTSUPP) {
871                                         rc = 0;
872                                 } else {
873                                         CERROR("got acl size: %d\n", rc);
874                                 }
875                         } else {
876                                 repbody->aclsize = rc;
877                                 repbody->valid |= OBD_MD_FLACL;
878                                 rc = 0;
879                         }
880                 }
881         }
882 #endif
883
884         if (info->mti_mdt->mdt_opts.mo_mds_capa &&
885             exp->exp_connect_flags & OBD_CONNECT_MDS_CAPA) {
886                 struct lustre_capa *capa;
887
888                 capa = req_capsule_server_get(info->mti_pill, &RMF_CAPA1);
889                 LASSERT(capa);
890                 capa->lc_opc = CAPA_OPC_MDS_DEFAULT;
891                 rc = mo_capa_get(info->mti_env, mdt_object_child(o), capa, 0);
892                 if (rc)
893                         RETURN(rc);
894                 repbody->valid |= OBD_MD_FLMDSCAPA;
895         }
896         if (info->mti_mdt->mdt_opts.mo_oss_capa &&
897             exp->exp_connect_flags & OBD_CONNECT_OSS_CAPA &&
898             S_ISREG(lu_object_attr(&o->mot_obj.mo_lu))) {
899                 struct lustre_capa *capa;
900
901                 capa = req_capsule_server_get(info->mti_pill, &RMF_CAPA2);
902                 LASSERT(capa);
903                 capa->lc_opc = CAPA_OPC_OSS_DEFAULT | capa_open_opc(flags);
904                 rc = mo_capa_get(info->mti_env, mdt_object_child(o), capa, 0);
905                 if (rc)
906                         RETURN(rc);
907                 repbody->valid |= OBD_MD_FLOSSCAPA;
908         }
909
910         /*
911          * If we are following a symlink, don't open; and do not return open
912          * handle for special nodes as client required.
913          */
914         if (islnk || (!isreg && !isdir &&
915             (req->rq_export->exp_connect_flags & OBD_CONNECT_NODEVOH))) {
916                 lustre_msg_set_transno(req->rq_repmsg, 0);
917                 RETURN(0);
918         }
919
920         mdt_set_disposition(info, rep, DISP_OPEN_OPEN);
921
922         /*
923          * We need to return the existing object's fid back, so it is done here,
924          * after preparing the reply.
925          */
926         if (!created && (flags & MDS_OPEN_EXCL) && (flags & MDS_OPEN_CREAT))
927                 RETURN(-EEXIST);
928
929         /* This can't be done earlier, we need to return reply body */
930         if (isdir) {
931                 if (flags & (MDS_OPEN_CREAT | FMODE_WRITE)) {
932                         /* We are trying to create or write an existing dir. */
933                         RETURN(-EISDIR);
934                 }
935         } else if (flags & MDS_OPEN_DIRECTORY)
936                 RETURN(-ENOTDIR);
937
938         if (OBD_FAIL_CHECK_RESET(OBD_FAIL_MDS_OPEN_CREATE,
939                                  OBD_FAIL_LDLM_REPLY | OBD_FAIL_ONCE)) {
940                 RETURN(-EAGAIN);
941         }
942
943         mfd = NULL;
944         if (lustre_msg_get_flags(req->rq_reqmsg) & MSG_RESENT) {
945                 spin_lock(&med->med_open_lock);
946                 cfs_list_for_each(t, &med->med_open_head) {
947                         mfd = cfs_list_entry(t, struct mdt_file_data, mfd_list);
948                         if (mfd->mfd_xid == req->rq_xid)
949                                 break;
950                         mfd = NULL;
951                 }
952                 spin_unlock(&med->med_open_lock);
953
954                 if (mfd != NULL) {
955                         repbody->handle.cookie = mfd->mfd_handle.h_cookie;
956                         /*set repbody->ea_size for resent case*/
957                         if (ma->ma_valid & MA_LOV) {
958                                 LASSERT(ma->ma_lmm_size != 0);
959                                 repbody->eadatasize = ma->ma_lmm_size;
960                                 if (isdir)
961                                         repbody->valid |= OBD_MD_FLDIREA;
962                                 else
963                                         repbody->valid |= OBD_MD_FLEASIZE;
964                         }
965                         RETURN(0);
966                 }
967         }
968
969         rc = mdt_mfd_open(info, p, o, flags, created);
970         RETURN(rc);
971 }
972
973 extern void mdt_req_from_lcd(struct ptlrpc_request *req,
974                              struct lsd_client_data *lcd);
975
976 void mdt_reconstruct_open(struct mdt_thread_info *info,
977                           struct mdt_lock_handle *lhc)
978 {
979         const struct lu_env *env = info->mti_env;
980         struct mdt_device       *mdt  = info->mti_mdt;
981         struct req_capsule      *pill = info->mti_pill;
982         struct ptlrpc_request   *req  = mdt_info_req(info);
983         struct tg_export_data   *ted  = &req->rq_export->exp_target_data;
984         struct lsd_client_data  *lcd  = ted->ted_lcd;
985         struct md_attr          *ma   = &info->mti_attr;
986         struct mdt_reint_record *rr   = &info->mti_rr;
987         __u32                   flags = info->mti_spec.sp_cr_flags;
988         struct ldlm_reply       *ldlm_rep;
989         struct mdt_object       *parent;
990         struct mdt_object       *child;
991         struct mdt_body         *repbody;
992         int                      rc;
993         ENTRY;
994
995         LASSERT(pill->rc_fmt == &RQF_LDLM_INTENT_OPEN);
996         ldlm_rep = req_capsule_server_get(pill, &RMF_DLM_REP);
997         repbody = req_capsule_server_get(pill, &RMF_MDT_BODY);
998
999         ma->ma_lmm = req_capsule_server_get(pill, &RMF_MDT_MD);
1000         ma->ma_lmm_size = req_capsule_get_size(pill, &RMF_MDT_MD,
1001                                                RCL_SERVER);
1002         ma->ma_need = MA_INODE;
1003         if (ma->ma_lmm_size > 0)
1004                 ma->ma_need |= MA_LOV;
1005
1006         ma->ma_valid = 0;
1007
1008         mdt_req_from_lcd(req, lcd);
1009         mdt_set_disposition(info, ldlm_rep, lcd->lcd_last_data);
1010
1011         CDEBUG(D_INODE, "This is reconstruct open: disp="LPX64", result=%d\n",
1012                ldlm_rep->lock_policy_res1, req->rq_status);
1013
1014         if (mdt_get_disposition(ldlm_rep, DISP_OPEN_CREATE) &&
1015             req->rq_status != 0)
1016                 /* We did not create successfully, return error to client. */
1017                 GOTO(out, rc = req->rq_status);
1018
1019         if (mdt_get_disposition(ldlm_rep, DISP_OPEN_CREATE)) {
1020                 struct obd_export *exp = req->rq_export;
1021                 /*
1022                  * We failed after creation, but we do not know in which step
1023                  * we failed. So try to check the child object.
1024                  */
1025                 parent = mdt_object_find(env, mdt, rr->rr_fid1);
1026                 if (IS_ERR(parent)) {
1027                         rc = PTR_ERR(parent);
1028                         LCONSOLE_WARN("Parent "DFID" lookup error %d."
1029                                       " Evicting client %s with export %s.\n",
1030                                       PFID(rr->rr_fid1), rc,
1031                                       obd_uuid2str(&exp->exp_client_uuid),
1032                                       obd_export_nid2str(exp));
1033                         mdt_export_evict(exp);
1034                         RETURN_EXIT;
1035                 }
1036                 child = mdt_object_find(env, mdt, rr->rr_fid2);
1037                 if (IS_ERR(child)) {
1038                         rc = PTR_ERR(child);
1039                         LCONSOLE_WARN("Child "DFID" lookup error %d."
1040                                       " Evicting client %s with export %s.\n",
1041                                       PFID(mdt_object_fid(child)), rc,
1042                                       obd_uuid2str(&exp->exp_client_uuid),
1043                                       obd_export_nid2str(exp));
1044                         mdt_object_put(env, parent);
1045                         mdt_export_evict(exp);
1046                         RETURN_EXIT;
1047                 }
1048                 rc = mdt_object_exists(child);
1049                 if (rc > 0) {
1050
1051                         mdt_set_capainfo(info, 1, rr->rr_fid2, BYPASS_CAPA);
1052                         rc = mdt_attr_get_complex(info, child, ma);
1053                         if (rc == 0)
1054                               rc = mdt_finish_open(info, parent, child,
1055                                                    flags, 1, ldlm_rep);
1056                 } else if (rc < 0) {
1057                         /* the child object was created on remote server */
1058                         repbody->fid1 = *rr->rr_fid2;
1059                         repbody->valid |= (OBD_MD_FLID | OBD_MD_MDS);
1060                         rc = 0;
1061                 } else if (rc == 0) {
1062                         /* the child does not exist, we should do regular open */
1063                         mdt_object_put(env, parent);
1064                         mdt_object_put(env, child);
1065                         GOTO(regular_open, 0);
1066                 }
1067                 mdt_object_put(env, parent);
1068                 mdt_object_put(env, child);
1069                 GOTO(out, rc);
1070         } else {
1071 regular_open:
1072                 /* We did not try to create, so we are a pure open */
1073                 rc = mdt_reint_open(info, lhc);
1074         }
1075
1076         EXIT;
1077 out:
1078         req->rq_status = rc;
1079         lustre_msg_set_status(req->rq_repmsg, req->rq_status);
1080         LASSERT(ergo(rc < 0, lustre_msg_get_transno(req->rq_repmsg) == 0));
1081 }
1082
1083 int mdt_open_by_fid(struct mdt_thread_info* info,
1084                     struct ldlm_reply *rep)
1085 {
1086         __u32                    flags = info->mti_spec.sp_cr_flags;
1087         struct mdt_reint_record *rr = &info->mti_rr;
1088         struct md_attr          *ma = &info->mti_attr;
1089         struct mdt_object       *o;
1090         int                      rc;
1091         ENTRY;
1092
1093         o = mdt_object_find(info->mti_env, info->mti_mdt, rr->rr_fid2);
1094         if (IS_ERR(o))
1095                 RETURN(rc = PTR_ERR(o));
1096
1097         rc = mdt_object_exists(o);
1098         if (rc > 0) {
1099                 mdt_set_disposition(info, rep, (DISP_IT_EXECD |
1100                                                 DISP_LOOKUP_EXECD |
1101                                                 DISP_LOOKUP_POS));
1102
1103                 rc = mdt_attr_get_complex(info, o, ma);
1104                 if (rc == 0)
1105                         rc = mdt_finish_open(info, NULL, o, flags, 0, rep);
1106         } else if (rc == 0) {
1107                 rc = -ENOENT;
1108         } else  {
1109                 /* the child object was created on remote server */
1110                 struct mdt_body *repbody;
1111                 repbody = req_capsule_server_get(info->mti_pill, &RMF_MDT_BODY);
1112                 repbody->fid1 = *rr->rr_fid2;
1113                 repbody->valid |= (OBD_MD_FLID | OBD_MD_MDS);
1114                 rc = 0;
1115         }
1116
1117         mdt_object_put(info->mti_env, o);
1118         RETURN(rc);
1119 }
1120
1121 int mdt_open_by_fid_lock(struct mdt_thread_info *info, struct ldlm_reply *rep,
1122                          struct mdt_lock_handle *lhc)
1123 {
1124         const struct lu_env     *env   = info->mti_env;
1125         struct mdt_device       *mdt   = info->mti_mdt;
1126         __u32                    flags = info->mti_spec.sp_cr_flags;
1127         struct mdt_reint_record *rr    = &info->mti_rr;
1128         struct md_attr          *ma    = &info->mti_attr;
1129         struct mdt_object       *parent= NULL;
1130         struct mdt_object       *o;
1131         int                      rc;
1132         ldlm_mode_t              lm;
1133         ENTRY;
1134
1135         if (md_should_create(flags) && !(flags & MDS_OPEN_HAS_EA)) {
1136                 if (!lu_fid_eq(rr->rr_fid1, rr->rr_fid2)) {
1137                         parent = mdt_object_find(env, mdt, rr->rr_fid1);
1138                         if (IS_ERR(parent)) {
1139                                 CDEBUG(D_INODE, "Fail to find parent "DFID
1140                                        " for anonymous created %ld, try to"
1141                                        " use server-side parent.\n",
1142                                        PFID(rr->rr_fid1), PTR_ERR(parent));
1143                                 parent = NULL;
1144                         }
1145                 }
1146                 if (parent == NULL)
1147                         ma->ma_need |= MA_PFID;
1148         }
1149
1150         o = mdt_object_find(env, mdt, rr->rr_fid2);
1151         if (IS_ERR(o))
1152                 RETURN(rc = PTR_ERR(o));
1153
1154         rc = mdt_object_exists(o);
1155         if (rc == 0) {
1156                 mdt_set_disposition(info, rep, (DISP_LOOKUP_EXECD |
1157                                     DISP_LOOKUP_NEG));
1158                 GOTO(out, rc = -ENOENT);
1159         } else if (rc < 0) {
1160                 CERROR("NFS remote open shouldn't happen.\n");
1161                 GOTO(out, rc);
1162         }
1163         mdt_set_disposition(info, rep, (DISP_IT_EXECD |
1164                                         DISP_LOOKUP_EXECD |
1165                                         DISP_LOOKUP_POS));
1166
1167         if (flags & FMODE_WRITE)
1168                 lm = LCK_CW;
1169         else if (flags & MDS_FMODE_EXEC)
1170                 lm = LCK_PR;
1171         else
1172                 lm = LCK_CR;
1173
1174         mdt_lock_handle_init(lhc);
1175         mdt_lock_reg_init(lhc, lm);
1176         rc = mdt_object_lock(info, o, lhc,
1177                              MDS_INODELOCK_LOOKUP | MDS_INODELOCK_OPEN,
1178                              MDT_CROSS_LOCK);
1179         if (rc)
1180                 GOTO(out, rc);
1181
1182         rc = mdt_attr_get_complex(info, o, ma);
1183         if (rc)
1184                 GOTO(out, rc);
1185
1186         if (ma->ma_valid & MA_PFID) {
1187                 parent = mdt_object_find(env, mdt, &ma->ma_pfid);
1188                 if (IS_ERR(parent)) {
1189                         CDEBUG(D_INODE, "Fail to find parent "DFID
1190                                " for anonymous created %ld, try to"
1191                                " use system default.\n",
1192                                PFID(&ma->ma_pfid), PTR_ERR(parent));
1193                         parent = NULL;
1194                 }
1195         }
1196
1197         if (flags & MDS_OPEN_LOCK)
1198                 mdt_set_disposition(info, rep, DISP_OPEN_LOCK);
1199         rc = mdt_finish_open(info, parent, o, flags, 0, rep);
1200
1201         if (!(flags & MDS_OPEN_LOCK) || rc)
1202                 mdt_object_unlock(info, o, lhc, 1);
1203
1204         GOTO(out, rc);
1205 out:
1206         mdt_object_put(env, o);
1207         if (parent != NULL)
1208                 mdt_object_put(env, parent);
1209         return rc;
1210 }
1211
1212 int mdt_pin(struct mdt_thread_info* info)
1213 {
1214         ENTRY;
1215         RETURN(err_serious(-EOPNOTSUPP));
1216 }
1217
1218 /* Cross-ref request. Currently it can only be a pure open (w/o create) */
1219 int mdt_cross_open(struct mdt_thread_info* info,
1220                    const struct lu_fid *fid,
1221                    struct ldlm_reply *rep, __u32 flags)
1222 {
1223         struct md_attr    *ma = &info->mti_attr;
1224         struct mdt_object *o;
1225         int                rc;
1226         ENTRY;
1227
1228         o = mdt_object_find(info->mti_env, info->mti_mdt, fid);
1229         if (IS_ERR(o))
1230                 RETURN(rc = PTR_ERR(o));
1231
1232         rc = mdt_object_exists(o);
1233         if (rc > 0) {
1234                 /* Do permission check for cross-open. */
1235                 rc = mo_permission(info->mti_env, NULL, mdt_object_child(o),
1236                                    NULL, flags | MDS_OPEN_CROSS);
1237                 if (rc)
1238                         goto out;
1239
1240                 mdt_set_capainfo(info, 0, fid, BYPASS_CAPA);
1241                 rc = mdt_attr_get_complex(info, o, ma);
1242                 if (rc == 0)
1243                         rc = mdt_finish_open(info, NULL, o, flags, 0, rep);
1244         } else if (rc == 0) {
1245                 /*
1246                  * Something is wrong here. lookup was positive but there is
1247                  * no object!
1248                  */
1249                 CERROR("Cross-ref object doesn't exist!\n");
1250                 rc = -EFAULT;
1251         } else  {
1252                 /* Something is wrong here, the object is on another MDS! */
1253                 CERROR("The object isn't on this server! FLD error?\n");
1254                 LU_OBJECT_DEBUG(D_WARNING, info->mti_env,
1255                                 &o->mot_obj.mo_lu,
1256                                 "Object isn't on this server! FLD error?\n");
1257
1258                 rc = -EFAULT;
1259         }
1260
1261 out:
1262         mdt_object_put(info->mti_env, o);
1263         RETURN(rc);
1264 }
1265
1266 int mdt_reint_open(struct mdt_thread_info *info, struct mdt_lock_handle *lhc)
1267 {
1268         struct mdt_device       *mdt = info->mti_mdt;
1269         struct ptlrpc_request   *req = mdt_info_req(info);
1270         struct mdt_object       *parent;
1271         struct mdt_object       *child;
1272         struct mdt_lock_handle  *lh;
1273         struct ldlm_reply       *ldlm_rep;
1274         struct mdt_body         *repbody;
1275         struct lu_fid           *child_fid = &info->mti_tmp_fid1;
1276         struct md_attr          *ma = &info->mti_attr;
1277         __u64                    create_flags = info->mti_spec.sp_cr_flags;
1278         struct mdt_reint_record *rr = &info->mti_rr;
1279         struct lu_name          *lname;
1280         int                      result, rc;
1281         int                      created = 0;
1282         __u32                    msg_flags;
1283         ENTRY;
1284
1285         OBD_FAIL_TIMEOUT_ORSET(OBD_FAIL_MDS_PAUSE_OPEN, OBD_FAIL_ONCE,
1286                                (obd_timeout + 1) / 4);
1287
1288         mdt_counter_incr(req, LPROC_MDT_OPEN);
1289         repbody = req_capsule_server_get(info->mti_pill, &RMF_MDT_BODY);
1290
1291         ma->ma_lmm = req_capsule_server_get(info->mti_pill, &RMF_MDT_MD);
1292         ma->ma_lmm_size = req_capsule_get_size(info->mti_pill, &RMF_MDT_MD,
1293                                                RCL_SERVER);
1294         ma->ma_need = MA_INODE;
1295         if (ma->ma_lmm_size > 0)
1296                 ma->ma_need |= MA_LOV;
1297
1298         ma->ma_valid = 0;
1299
1300         LASSERT(info->mti_pill->rc_fmt == &RQF_LDLM_INTENT_OPEN);
1301         ldlm_rep = req_capsule_server_get(info->mti_pill, &RMF_DLM_REP);
1302
1303         if (unlikely(create_flags & MDS_OPEN_JOIN_FILE)) {
1304                 CERROR("file join is not supported anymore.\n");
1305                 GOTO(out, result = err_serious(-EOPNOTSUPP));
1306         }
1307         msg_flags = lustre_msg_get_flags(req->rq_reqmsg);
1308
1309         if ((create_flags & (MDS_OPEN_HAS_EA | MDS_OPEN_HAS_OBJS)) &&
1310             info->mti_spec.u.sp_ea.eadata == NULL)
1311                 GOTO(out, result = err_serious(-EINVAL));
1312
1313         CDEBUG(D_INODE, "I am going to open "DFID"/(%s->"DFID") "
1314                "cr_flag="LPO64" mode=0%06o msg_flag=0x%x\n",
1315                PFID(rr->rr_fid1), rr->rr_name,
1316                PFID(rr->rr_fid2), create_flags,
1317                ma->ma_attr.la_mode, msg_flags);
1318
1319         if (req_is_replay(req) ||
1320             (req->rq_export->exp_libclient && create_flags & MDS_OPEN_HAS_EA)) {
1321                 /* This is a replay request or from liblustre with ea. */
1322                 result = mdt_open_by_fid(info, ldlm_rep);
1323
1324                 if (result != -ENOENT) {
1325                         if (req->rq_export->exp_libclient &&
1326                             create_flags & MDS_OPEN_HAS_EA)
1327                                 GOTO(out, result = 0);
1328                         GOTO(out, result);
1329                 }
1330                 /* We didn't find the correct object, so we need to re-create it
1331                  * via a regular replay. */
1332                 if (!(create_flags & MDS_OPEN_CREAT)) {
1333                         DEBUG_REQ(D_ERROR, req,
1334                                   "OPEN & CREAT not in open replay/by_fid.");
1335                         GOTO(out, result = -EFAULT);
1336                 }
1337                 CDEBUG(D_INFO, "No object(1), continue as regular open.\n");
1338         } else if ((rr->rr_namelen == 0 && !info->mti_cross_ref &&
1339                     create_flags & MDS_OPEN_LOCK) ||
1340                    (create_flags & MDS_OPEN_BY_FID)) {
1341                 result = mdt_open_by_fid_lock(info, ldlm_rep, lhc);
1342                 if (result != -ENOENT && !(create_flags & MDS_OPEN_CREAT))
1343                         GOTO(out, result);
1344                 if (unlikely(rr->rr_namelen == 0))
1345                         GOTO(out, result = -EINVAL);
1346                 CDEBUG(D_INFO, "No object(2), continue as regular open.\n");
1347         }
1348
1349         if (OBD_FAIL_CHECK(OBD_FAIL_MDS_OPEN_PACK))
1350                 GOTO(out, result = err_serious(-ENOMEM));
1351
1352         mdt_set_disposition(info, ldlm_rep,
1353                             (DISP_IT_EXECD | DISP_LOOKUP_EXECD));
1354
1355         if (info->mti_cross_ref) {
1356                 /* This is cross-ref open */
1357                 mdt_set_disposition(info, ldlm_rep, DISP_LOOKUP_POS);
1358                 result = mdt_cross_open(info, rr->rr_fid1, ldlm_rep,
1359                                         create_flags);
1360                 GOTO(out, result);
1361         }
1362
1363         lh = &info->mti_lh[MDT_LH_PARENT];
1364         mdt_lock_pdo_init(lh, (create_flags & MDS_OPEN_CREAT) ?
1365                           LCK_PW : LCK_PR, rr->rr_name, rr->rr_namelen);
1366
1367         parent = mdt_object_find_lock(info, rr->rr_fid1, lh,
1368                                       MDS_INODELOCK_UPDATE);
1369         if (IS_ERR(parent))
1370                 GOTO(out, result = PTR_ERR(parent));
1371
1372         /* get and check version of parent */
1373         result = mdt_version_get_check(info, parent, 0);
1374         if (result)
1375                 GOTO(out_parent, result);
1376
1377         fid_zero(child_fid);
1378
1379         lname = mdt_name(info->mti_env, (char *)rr->rr_name, rr->rr_namelen);
1380         result = mdo_lookup(info->mti_env, mdt_object_child(parent),
1381                             lname, child_fid, &info->mti_spec);
1382         LASSERTF(ergo(result == 0, fid_is_sane(child_fid)),
1383                  "looking for "DFID"/%s, result fid="DFID"\n",
1384                  PFID(mdt_object_fid(parent)), rr->rr_name, PFID(child_fid));
1385
1386         if (result != 0 && result != -ENOENT && result != -ESTALE)
1387                 GOTO(out_parent, result);
1388
1389         if (result == -ENOENT || result == -ESTALE) {
1390                 mdt_set_disposition(info, ldlm_rep, DISP_LOOKUP_NEG);
1391                 if (result == -ESTALE) {
1392                         /*
1393                          * -ESTALE means the parent is a dead(unlinked) dir, so
1394                          * it should return -ENOENT to in accordance with the
1395                          * original mds implementaion.
1396                          */
1397                         GOTO(out_parent, result = -ENOENT);
1398                 }
1399                 if (!(create_flags & MDS_OPEN_CREAT))
1400                         GOTO(out_parent, result);
1401                 *child_fid = *info->mti_rr.rr_fid2;
1402                 LASSERTF(fid_is_sane(child_fid), "fid="DFID"\n",
1403                          PFID(child_fid));
1404                 /* In the function below, .hs_keycmp resolves to
1405                  * lu_obj_hop_keycmp() */
1406                 /* coverity[overrun-buffer-val] */
1407                 child = mdt_object_new(info->mti_env, mdt, child_fid);
1408         } else {
1409                 /*
1410                  * Check for O_EXCL is moved to the mdt_finish_open(), we need to
1411                  * return FID back in that case.
1412                  */
1413                 mdt_set_disposition(info, ldlm_rep, DISP_LOOKUP_POS);
1414                 child = mdt_object_find(info->mti_env, mdt, child_fid);
1415         }
1416         if (IS_ERR(child))
1417                 GOTO(out_parent, result = PTR_ERR(child));
1418
1419         /** check version of child  */
1420         rc = mdt_version_get_check(info, child, 1);
1421         if (rc)
1422                 GOTO(out_child, result = rc);
1423
1424         mdt_set_capainfo(info, 1, child_fid, BYPASS_CAPA);
1425         if (result == -ENOENT) {
1426                 if (mdt_object_obf(parent))
1427                         GOTO(out_child, result = -EPERM);
1428
1429                 /* save versions in reply */
1430                 mdt_version_get_save(info, parent, 0);
1431                 mdt_version_get_save(info, child, 1);
1432
1433                 /* version of child will be changed */
1434                 info->mti_mos = child;
1435
1436                 /* Not found and with MDS_OPEN_CREAT: let's create it. */
1437                 mdt_set_disposition(info, ldlm_rep, DISP_OPEN_CREATE);
1438
1439                 /* Let lower layers know what is lock mode on directory. */
1440                 info->mti_spec.sp_cr_mode =
1441                         mdt_dlm_mode2mdl_mode(lh->mlh_pdo_mode);
1442
1443                 /*
1444                  * Do not perform lookup sanity check. We know that name does
1445                  * not exist.
1446                  */
1447                 info->mti_spec.sp_cr_lookup = 0;
1448                 info->mti_spec.sp_feat = &dt_directory_features;
1449
1450                 result = mdo_create(info->mti_env,
1451                                     mdt_object_child(parent),
1452                                     lname,
1453                                     mdt_object_child(child),
1454                                     &info->mti_spec,
1455                                     &info->mti_attr);
1456                 if (result == -ERESTART) {
1457                         mdt_clear_disposition(info, ldlm_rep, DISP_OPEN_CREATE);
1458                         GOTO(out_child, result);
1459                 } else {
1460
1461                         /* XXX: we should call this once, see few lines below */
1462                         if (result == 0)
1463                                 result = mdt_attr_get_complex(info, child, ma);
1464
1465                         if (result != 0)
1466                                 GOTO(out_child, result);
1467                 }
1468                 created = 1;
1469         } else {
1470                 /* We have to get attr & lov ea for this object */
1471                 result = mdt_attr_get_complex(info, child, ma);
1472                 /*
1473                  * The object is on remote node, return its FID for remote open.
1474                  */
1475                 if (result == -EREMOTE) {
1476                         /*
1477                          * Check if this lock already was sent to client and
1478                          * this is resent case. For resent case do not take lock
1479                          * again, use what is already granted.
1480                          */
1481                         LASSERT(lhc != NULL);
1482
1483                         if (lustre_handle_is_used(&lhc->mlh_reg_lh)) {
1484                                 struct ldlm_lock *lock;
1485
1486                                 LASSERT(msg_flags & MSG_RESENT);
1487
1488                                 lock = ldlm_handle2lock(&lhc->mlh_reg_lh);
1489                                 if (!lock) {
1490                                         CERROR("Invalid lock handle "LPX64"\n",
1491                                                lhc->mlh_reg_lh.cookie);
1492                                         LBUG();
1493                                 }
1494                                 LASSERT(fid_res_name_eq(mdt_object_fid(child),
1495                                                         &lock->l_resource->lr_name));
1496                                 LDLM_LOCK_PUT(lock);
1497                                 rc = 0;
1498                         } else {
1499                                 mdt_lock_handle_init(lhc);
1500                                 mdt_lock_reg_init(lhc, LCK_PR);
1501
1502                                 rc = mdt_object_lock(info, child, lhc,
1503                                                      MDS_INODELOCK_LOOKUP,
1504                                                      MDT_CROSS_LOCK);
1505                         }
1506                         repbody->fid1 = *mdt_object_fid(child);
1507                         repbody->valid |= (OBD_MD_FLID | OBD_MD_MDS);
1508                         if (rc != 0)
1509                                 result = rc;
1510                         GOTO(out_child, result);
1511                 }
1512         }
1513
1514         LASSERT(!lustre_handle_is_used(&lhc->mlh_reg_lh));
1515
1516         /* get openlock if this is not replay and if a client requested it */
1517         if (!req_is_replay(req) && create_flags & MDS_OPEN_LOCK) {
1518                 ldlm_mode_t lm;
1519
1520                 if (create_flags & FMODE_WRITE)
1521                         lm = LCK_CW;
1522                 else if (create_flags & MDS_FMODE_EXEC)
1523                         lm = LCK_PR;
1524                 else
1525                         lm = LCK_CR;
1526                 mdt_lock_handle_init(lhc);
1527                 mdt_lock_reg_init(lhc, lm);
1528                 rc = mdt_object_lock(info, child, lhc,
1529                                      MDS_INODELOCK_LOOKUP | MDS_INODELOCK_OPEN,
1530                                      MDT_CROSS_LOCK);
1531                 if (rc) {
1532                         result = rc;
1533                         GOTO(out_child, result);
1534                 } else {
1535                         result = -EREMOTE;
1536                         mdt_set_disposition(info, ldlm_rep, DISP_OPEN_LOCK);
1537                 }
1538         }
1539
1540         /* Try to open it now. */
1541         rc = mdt_finish_open(info, parent, child, create_flags,
1542                              created, ldlm_rep);
1543         if (rc) {
1544                 result = rc;
1545                 if (lustre_handle_is_used(&lhc->mlh_reg_lh))
1546                         /* openlock was acquired and mdt_finish_open failed -
1547                            drop the openlock */
1548                         mdt_object_unlock(info, child, lhc, 1);
1549                 if (created) {
1550                         ma->ma_need = 0;
1551                         ma->ma_valid = 0;
1552                         ma->ma_cookie_size = 0;
1553                         rc = mdo_unlink(info->mti_env,
1554                                         mdt_object_child(parent),
1555                                         mdt_object_child(child),
1556                                         lname,
1557                                         &info->mti_attr);
1558                         if (rc != 0)
1559                                 CERROR("Error in cleanup of open\n");
1560                 }
1561         }
1562         EXIT;
1563 out_child:
1564         mdt_object_put(info->mti_env, child);
1565 out_parent:
1566         mdt_object_unlock_put(info, parent, lh, result || !created);
1567 out:
1568         if (result && result != -EREMOTE)
1569                 lustre_msg_set_transno(req->rq_repmsg, 0);
1570         return result;
1571 }
1572
1573 #define MFD_CLOSED(mode) (((mode) & ~(MDS_FMODE_EPOCH | MDS_FMODE_SOM | \
1574                                       MDS_FMODE_TRUNC)) == MDS_FMODE_CLOSED)
1575
1576 static int mdt_mfd_closed(struct mdt_file_data *mfd)
1577 {
1578         return ((mfd == NULL) || MFD_CLOSED(mfd->mfd_mode));
1579 }
1580
1581 int mdt_mfd_close(struct mdt_thread_info *info, struct mdt_file_data *mfd)
1582 {
1583         struct mdt_object *o = mfd->mfd_object;
1584         struct md_object *next = mdt_object_child(o);
1585         struct md_attr *ma = &info->mti_attr;
1586         int ret = MDT_IOEPOCH_CLOSED;
1587         int rc = 0;
1588         int mode;
1589         ENTRY;
1590
1591         mode = mfd->mfd_mode;
1592
1593         if ((mode & FMODE_WRITE) || (mode & MDS_FMODE_TRUNC)) {
1594                 mdt_write_put(o);
1595                 ret = mdt_ioepoch_close(info, o);
1596         } else if (mode & MDS_FMODE_EXEC) {
1597                 mdt_write_allow(o);
1598         } else if (mode & MDS_FMODE_EPOCH) {
1599                 ret = mdt_ioepoch_close(info, o);
1600         } else if (mode & MDS_FMODE_SOM) {
1601                 ret = mdt_som_au_close(info, o);
1602         }
1603
1604         /* Update atime on close only. */
1605         if ((mode & MDS_FMODE_EXEC || mode & FMODE_READ || mode & FMODE_WRITE)
1606             && (ma->ma_valid & MA_INODE) && (ma->ma_attr.la_valid & LA_ATIME)) {
1607                 /* Set the atime only. */
1608                 ma->ma_valid = MA_INODE;
1609                 ma->ma_attr.la_valid = LA_ATIME;
1610                 rc = mo_attr_set(info->mti_env, next, ma);
1611         }
1612
1613         ma->ma_need |= MA_INODE;
1614         ma->ma_valid &= ~MA_INODE;
1615
1616         if (!MFD_CLOSED(mode))
1617                 rc = mo_close(info->mti_env, next, ma, mode);
1618
1619         if (ret == MDT_IOEPOCH_GETATTR || ret == MDT_IOEPOCH_OPENED) {
1620                 struct mdt_export_data *med;
1621
1622                 /* The IOepoch is still opened or SOM update is needed.
1623                  * Put mfd back into the list. */
1624                 LASSERT(mdt_conn_flags(info) & OBD_CONNECT_SOM);
1625                 mdt_mfd_set_mode(mfd, ret == MDT_IOEPOCH_OPENED ?
1626                                       MDS_FMODE_EPOCH : MDS_FMODE_SOM);
1627
1628                 LASSERT(mdt_info_req(info));
1629                 med = &mdt_info_req(info)->rq_export->exp_mdt_data;
1630                 spin_lock(&med->med_open_lock);
1631                 cfs_list_add(&mfd->mfd_list, &med->med_open_head);
1632                 class_handle_hash_back(&mfd->mfd_handle);
1633                 spin_unlock(&med->med_open_lock);
1634
1635                 if (ret == MDT_IOEPOCH_OPENED) {
1636                         ret = 0;
1637                 } else {
1638                         ret = -EAGAIN;
1639                         CDEBUG(D_INODE, "Size-on-MDS attribute update is "
1640                                "needed on "DFID"\n", PFID(mdt_object_fid(o)));
1641                 }
1642         } else {
1643                 mdt_mfd_free(mfd);
1644                 mdt_object_put(info->mti_env, o);
1645         }
1646
1647         RETURN(rc ? rc : ret);
1648 }
1649
1650 int mdt_close(struct mdt_thread_info *info)
1651 {
1652         struct mdt_export_data *med;
1653         struct mdt_file_data   *mfd;
1654         struct mdt_object      *o;
1655         struct md_attr         *ma = &info->mti_attr;
1656         struct mdt_body        *repbody = NULL;
1657         struct ptlrpc_request  *req = mdt_info_req(info);
1658         int rc, ret = 0;
1659         ENTRY;
1660
1661         mdt_counter_incr(req, LPROC_MDT_CLOSE);
1662         /* Close may come with the Size-on-MDS update. Unpack it. */
1663         rc = mdt_close_unpack(info);
1664         if (rc)
1665                 RETURN(err_serious(rc));
1666
1667         LASSERT(info->mti_ioepoch);
1668
1669         req_capsule_set_size(info->mti_pill, &RMF_MDT_MD, RCL_SERVER,
1670                              info->mti_mdt->mdt_max_mdsize);
1671         req_capsule_set_size(info->mti_pill, &RMF_LOGCOOKIES, RCL_SERVER,
1672                              info->mti_mdt->mdt_max_cookiesize);
1673         rc = req_capsule_server_pack(info->mti_pill);
1674         if (mdt_check_resent(info, mdt_reconstruct_generic, NULL)) {
1675                 mdt_client_compatibility(info);
1676                 if (rc == 0)
1677                         mdt_fix_reply(info);
1678                 mdt_exit_ucred(info);
1679                 RETURN(lustre_msg_get_status(req->rq_repmsg));
1680         }
1681
1682         /* Continue to close handle even if we can not pack reply */
1683         if (rc == 0) {
1684                 repbody = req_capsule_server_get(info->mti_pill,
1685                                                  &RMF_MDT_BODY);
1686                 ma->ma_lmm = req_capsule_server_get(info->mti_pill,
1687                                                     &RMF_MDT_MD);
1688                 ma->ma_lmm_size = req_capsule_get_size(info->mti_pill,
1689                                                        &RMF_MDT_MD,
1690                                                        RCL_SERVER);
1691                 ma->ma_cookie = req_capsule_server_get(info->mti_pill,
1692                                                        &RMF_LOGCOOKIES);
1693                 ma->ma_cookie_size = req_capsule_get_size(info->mti_pill,
1694                                                           &RMF_LOGCOOKIES,
1695                                                           RCL_SERVER);
1696                 ma->ma_need = MA_INODE | MA_LOV | MA_COOKIE;
1697                 repbody->eadatasize = 0;
1698                 repbody->aclsize = 0;
1699         } else {
1700                 rc = err_serious(rc);
1701         }
1702
1703         med = &req->rq_export->exp_mdt_data;
1704         spin_lock(&med->med_open_lock);
1705         mfd = mdt_handle2mfd(info, &info->mti_ioepoch->handle);
1706         if (mdt_mfd_closed(mfd)) {
1707                 spin_unlock(&med->med_open_lock);
1708                 CDEBUG(D_INODE, "no handle for file close: fid = "DFID
1709                        ": cookie = "LPX64"\n", PFID(info->mti_rr.rr_fid1),
1710                        info->mti_ioepoch->handle.cookie);
1711                 /** not serious error since bug 3633 */
1712                 rc = -ESTALE;
1713         } else {
1714                 class_handle_unhash(&mfd->mfd_handle);
1715                 cfs_list_del_init(&mfd->mfd_list);
1716                 spin_unlock(&med->med_open_lock);
1717
1718                 /* Do not lose object before last unlink. */
1719                 o = mfd->mfd_object;
1720                 mdt_object_get(info->mti_env, o);
1721                 ret = mdt_mfd_close(info, mfd);
1722                 if (repbody != NULL)
1723                         rc = mdt_handle_last_unlink(info, o, ma);
1724                 mdt_empty_transno(info, rc);
1725                 mdt_object_put(info->mti_env, o);
1726         }
1727         if (repbody != NULL) {
1728                 mdt_client_compatibility(info);
1729                 rc = mdt_fix_reply(info);
1730         }
1731
1732         mdt_exit_ucred(info);
1733         if (OBD_FAIL_CHECK(OBD_FAIL_MDS_CLOSE_PACK))
1734                 RETURN(err_serious(-ENOMEM));
1735
1736         if (OBD_FAIL_CHECK_RESET(OBD_FAIL_MDS_CLOSE_NET_REP,
1737                                  OBD_FAIL_MDS_CLOSE_NET_REP))
1738                 info->mti_fail_id = OBD_FAIL_MDS_CLOSE_NET_REP;
1739         RETURN(rc ? rc : ret);
1740 }
1741
1742 /**
1743  * DONE_WRITING rpc handler.
1744  *
1745  * As mfd is not kept after replayed CLOSE (see mdt_ioepoch_close_on_replay()),
1746  * only those DONE_WRITING rpc will be replayed which really wrote smth on disk,
1747  * and got a trasid. Waiting for such DONE_WRITING is not reliable, so just
1748  * skip attributes and reconstruct the reply here.
1749  */
1750 int mdt_done_writing(struct mdt_thread_info *info)
1751 {
1752         struct ptlrpc_request   *req = mdt_info_req(info);
1753         struct mdt_body         *repbody = NULL;
1754         struct mdt_export_data  *med;
1755         struct mdt_file_data    *mfd;
1756         int rc;
1757         ENTRY;
1758
1759         rc = req_capsule_server_pack(info->mti_pill);
1760         if (rc)
1761                 RETURN(err_serious(rc));
1762
1763         repbody = req_capsule_server_get(info->mti_pill,
1764                                          &RMF_MDT_BODY);
1765         repbody->eadatasize = 0;
1766         repbody->aclsize = 0;
1767
1768         /* Done Writing may come with the Size-on-MDS update. Unpack it. */
1769         rc = mdt_close_unpack(info);
1770         if (rc)
1771                 RETURN(err_serious(rc));
1772
1773         if (mdt_check_resent(info, mdt_reconstruct_generic, NULL)) {
1774                 mdt_exit_ucred(info);
1775                 RETURN(lustre_msg_get_status(req->rq_repmsg));
1776         }
1777
1778         med = &info->mti_exp->exp_mdt_data;
1779         spin_lock(&med->med_open_lock);
1780         mfd = mdt_handle2mfd(info, &info->mti_ioepoch->handle);
1781         if (mfd == NULL) {
1782                 spin_unlock(&med->med_open_lock);
1783                 CDEBUG(D_INODE, "no handle for done write: fid = "DFID
1784                        ": cookie = "LPX64" ioepoch = "LPU64"\n",
1785                        PFID(info->mti_rr.rr_fid1),
1786                        info->mti_ioepoch->handle.cookie,
1787                        info->mti_ioepoch->ioepoch);
1788                 /* If this is a replay, reconstruct the transno. */
1789                 if (lustre_msg_get_flags(req->rq_reqmsg) & MSG_REPLAY) {
1790                         rc = info->mti_ioepoch->flags & MF_SOM_AU ?
1791                              -EAGAIN : 0;
1792                         mdt_empty_transno(info, rc);
1793                 } else
1794                         rc = -ESTALE;
1795                 GOTO(error_ucred, rc);
1796         }
1797
1798         LASSERT(mfd->mfd_mode == MDS_FMODE_EPOCH ||
1799                 mfd->mfd_mode == MDS_FMODE_TRUNC);
1800         class_handle_unhash(&mfd->mfd_handle);
1801         cfs_list_del_init(&mfd->mfd_list);
1802         spin_unlock(&med->med_open_lock);
1803
1804         /* Set EPOCH CLOSE flag if not set by client. */
1805         info->mti_ioepoch->flags |= MF_EPOCH_CLOSE;
1806         info->mti_attr.ma_valid = 0;
1807
1808         info->mti_attr.ma_lmm_size = info->mti_mdt->mdt_max_mdsize;
1809         OBD_ALLOC_LARGE(info->mti_attr.ma_lmm, info->mti_mdt->mdt_max_mdsize);
1810         if (info->mti_attr.ma_lmm == NULL)
1811                 GOTO(error_ucred, rc = -ENOMEM);
1812
1813         rc = mdt_mfd_close(info, mfd);
1814
1815         OBD_FREE_LARGE(info->mti_attr.ma_lmm, info->mti_mdt->mdt_max_mdsize);
1816         mdt_empty_transno(info, rc);
1817 error_ucred:
1818         mdt_exit_ucred(info);
1819         RETURN(rc);
1820 }