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LU-8475 target: use slab allocation
[fs/lustre-release.git] / lustre / ofd / ofd_io.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.gnu.org/licenses/gpl-2.0.html
19  *
20  * GPL HEADER END
21  */
22 /*
23  * Copyright (c) 2009, 2010, Oracle and/or its affiliates. All rights reserved.
24  * Use is subject to license terms.
25  *
26  * Copyright (c) 2012, 2016, Intel Corporation.
27  */
28 /*
29  * This file is part of Lustre, http://www.lustre.org/
30  * Lustre is a trademark of Sun Microsystems, Inc.
31  *
32  * lustre/ofd/ofd_io.c
33  *
34  * This file provides functions to handle IO requests from clients and
35  * also LFSCK routines to check parent file identifier (PFID) consistency.
36  *
37  * Author: Alexey Zhuravlev <alexey.zhuravlev@intel.com>
38  * Author: Fan Yong <fan.yong@intel.com>
39  */
40
41 #define DEBUG_SUBSYSTEM S_FILTER
42
43 #include <linux/kthread.h>
44 #include "ofd_internal.h"
45 #include <lustre_nodemap.h>
46
47 struct ofd_inconsistency_item {
48         struct list_head         oii_list;
49         struct ofd_object       *oii_obj;
50         struct filter_fid        oii_ff;
51 };
52
53 /**
54  * Verify single object for parent FID consistency.
55  *
56  * Part of LFSCK processing which checks single object PFID stored in extended
57  * attribute (XATTR) against real FID of MDT parent object received by LFSCK.
58  * This verifies that the OST object is being referenced by only a single MDT
59  * object.
60  *
61  * \param[in] env       execution environment
62  * \param[in] ofd       OFD device
63  * \param[in] oii       object-related local data
64  * \param[in] lrl       LFSCK request data
65  */
66 static void ofd_inconsistency_verify_one(const struct lu_env *env,
67                                          struct ofd_device *ofd,
68                                          struct ofd_inconsistency_item *oii,
69                                          struct lfsck_req_local *lrl)
70 {
71         struct ofd_object *fo = oii->oii_obj;
72         struct filter_fid *client_ff = &oii->oii_ff;
73         struct filter_fid *local_ff = &fo->ofo_ff;
74         int rc;
75
76         LASSERT(fo->ofo_pfid_checking);
77         LASSERT(!fo->ofo_pfid_verified);
78
79         lrl->lrl_fid = fo->ofo_header.loh_fid; /* OST-object itself FID. */
80         lrl->lrl_ff_client = *client_ff; /* client given PFID. */
81         lrl->lrl_ff_local = *local_ff; /* OST local stored PFID. */
82
83         rc = lfsck_in_notify_local(env, ofd->ofd_osd, lrl, NULL);
84         ofd_write_lock(env, fo);
85         switch (lrl->lrl_status) {
86         case LPVS_INIT:
87                 LASSERT(rc <= 0);
88
89                 if (rc < 0)
90                         CDEBUG(D_LFSCK, "%s: fail to verify OST local stored "
91                                "PFID xattr for "DFID", the client given PFID "
92                                DFID", OST local stored PFID "DFID": rc = %d\n",
93                                ofd_name(ofd), PFID(&fo->ofo_header.loh_fid),
94                                PFID(&client_ff->ff_parent),
95                                PFID(&local_ff->ff_parent), rc);
96                 else
97                         fo->ofo_pfid_verified = 1;
98                 break;
99         case LPVS_INCONSISTENT:
100                 LASSERT(rc != 0);
101
102                 ofd->ofd_inconsistency_self_detected++;
103                 if (rc < 0)
104                         CDEBUG(D_LFSCK, "%s: fail to verify the client given "
105                                "PFID for "DFID", the client given PFID "DFID
106                                ", local stored PFID "DFID": rc = %d\n",
107                                ofd_name(ofd), PFID(&fo->ofo_header.loh_fid),
108                                PFID(&client_ff->ff_parent),
109                                PFID(&local_ff->ff_parent), rc);
110                 else
111                         CDEBUG(D_LFSCK, "%s: both the client given PFID and "
112                                "the OST local stored PFID are stale for the "
113                                "OST-object "DFID", client given PFID is "DFID
114                                ", local stored PFID is "DFID"\n",
115                                ofd_name(ofd), PFID(&fo->ofo_header.loh_fid),
116                                PFID(&client_ff->ff_parent),
117                                PFID(&local_ff->ff_parent));
118                 break;
119         case LPVS_INCONSISTENT_TOFIX:
120                 ofd->ofd_inconsistency_self_detected++;
121                 if (rc == 0) {
122                         ofd->ofd_inconsistency_self_repaired++;
123                         CDEBUG(D_LFSCK, "%s: fixed the staled OST PFID xattr "
124                                "for "DFID", with the client given PFID "DFID
125                                ", the old stored PFID "DFID"\n",
126                                ofd_name(ofd), PFID(&fo->ofo_header.loh_fid),
127                                PFID(&client_ff->ff_parent),
128                                PFID(&local_ff->ff_parent));
129                 } else if (rc < 0) {
130                         CDEBUG(D_LFSCK, "%s: fail to fix the OST PFID xattr "
131                                "for "DFID", client given PFID "DFID", local "
132                                "stored PFID "DFID": rc = %d\n",
133                                ofd_name(ofd), PFID(&fo->ofo_header.loh_fid),
134                                PFID(&client_ff->ff_parent),
135                                PFID(&local_ff->ff_parent), rc);
136                 }
137                 local_ff->ff_parent = client_ff->ff_parent;
138                 fo->ofo_pfid_verified = 1;
139                 break;
140         default:
141                 break;
142         }
143         fo->ofo_pfid_checking = 0;
144         ofd_write_unlock(env, fo);
145
146         ofd_object_put(env, fo);
147         OBD_FREE_PTR(oii);
148 }
149
150 /**
151  * Verification thread to check parent FID consistency.
152  *
153  * Kernel thread to check consistency of parent FID for any
154  * new item added for checking by ofd_add_inconsistency_item().
155  *
156  * \param[in] args      OFD device
157  *
158  * \retval              0 on successful thread termination
159  * \retval              negative value if thread can't start
160  */
161 static int ofd_inconsistency_verification_main(void *args)
162 {
163         struct lu_env env;
164         struct ofd_device *ofd = args;
165         struct ptlrpc_thread *thread = &ofd->ofd_inconsistency_thread;
166         struct ofd_inconsistency_item *oii;
167         struct lfsck_req_local *lrl = NULL;
168         struct l_wait_info lwi = { 0 };
169         int rc;
170         ENTRY;
171
172         rc = lu_env_init(&env, LCT_DT_THREAD);
173         spin_lock(&ofd->ofd_inconsistency_lock);
174         thread_set_flags(thread, rc ? SVC_STOPPED : SVC_RUNNING);
175         wake_up_all(&thread->t_ctl_waitq);
176         spin_unlock(&ofd->ofd_inconsistency_lock);
177         if (rc)
178                 RETURN(rc);
179
180         OBD_ALLOC_PTR(lrl);
181         if (unlikely(!lrl))
182                 GOTO(out_unlocked, rc = -ENOMEM);
183
184         lrl->lrl_event = LEL_PAIRS_VERIFY_LOCAL;
185         lrl->lrl_active = LFSCK_TYPE_LAYOUT;
186
187         spin_lock(&ofd->ofd_inconsistency_lock);
188         while (1) {
189                 if (unlikely(!thread_is_running(thread)))
190                         break;
191
192                 while (!list_empty(&ofd->ofd_inconsistency_list)) {
193                         oii = list_entry(ofd->ofd_inconsistency_list.next,
194                                          struct ofd_inconsistency_item,
195                                          oii_list);
196                         list_del_init(&oii->oii_list);
197                         spin_unlock(&ofd->ofd_inconsistency_lock);
198                         ofd_inconsistency_verify_one(&env, ofd, oii, lrl);
199                         spin_lock(&ofd->ofd_inconsistency_lock);
200                 }
201
202                 spin_unlock(&ofd->ofd_inconsistency_lock);
203                 l_wait_event(thread->t_ctl_waitq,
204                              !list_empty(&ofd->ofd_inconsistency_list) ||
205                              !thread_is_running(thread),
206                              &lwi);
207                 spin_lock(&ofd->ofd_inconsistency_lock);
208         }
209
210         while (!list_empty(&ofd->ofd_inconsistency_list)) {
211                 struct ofd_object *fo;
212
213                 oii = list_entry(ofd->ofd_inconsistency_list.next,
214                                  struct ofd_inconsistency_item,
215                                  oii_list);
216                 list_del_init(&oii->oii_list);
217                 fo = oii->oii_obj;
218                 spin_unlock(&ofd->ofd_inconsistency_lock);
219
220                 ofd_write_lock(&env, fo);
221                 fo->ofo_pfid_checking = 0;
222                 ofd_write_unlock(&env, fo);
223
224                 ofd_object_put(&env, fo);
225                 OBD_FREE_PTR(oii);
226                 spin_lock(&ofd->ofd_inconsistency_lock);
227         }
228
229         OBD_FREE_PTR(lrl);
230
231         GOTO(out, rc = 0);
232
233 out_unlocked:
234         spin_lock(&ofd->ofd_inconsistency_lock);
235 out:
236         thread_set_flags(thread, SVC_STOPPED);
237         wake_up_all(&thread->t_ctl_waitq);
238         spin_unlock(&ofd->ofd_inconsistency_lock);
239         lu_env_fini(&env);
240
241         return rc;
242 }
243
244 /**
245  * Start parent FID verification thread.
246  *
247  * See ofd_inconsistency_verification_main().
248  *
249  * \param[in] ofd       OFD device
250  *
251  * \retval              0 on successful start of thread
252  * \retval              negative value on error
253  */
254 int ofd_start_inconsistency_verification_thread(struct ofd_device *ofd)
255 {
256         struct ptlrpc_thread    *thread = &ofd->ofd_inconsistency_thread;
257         struct l_wait_info       lwi    = { 0 };
258         struct task_struct      *task;
259         int                      rc;
260
261         spin_lock(&ofd->ofd_inconsistency_lock);
262         if (unlikely(thread_is_running(thread))) {
263                 spin_unlock(&ofd->ofd_inconsistency_lock);
264
265                 return -EALREADY;
266         }
267
268         thread_set_flags(thread, 0);
269         spin_unlock(&ofd->ofd_inconsistency_lock);
270         task = kthread_run(ofd_inconsistency_verification_main, ofd,
271                            "inconsistency_verification");
272         if (IS_ERR(task)) {
273                 rc = PTR_ERR(task);
274                 CERROR("%s: cannot start self_repair thread: rc = %d\n",
275                        ofd_name(ofd), rc);
276         } else {
277                 rc = 0;
278                 l_wait_event(thread->t_ctl_waitq,
279                              thread_is_running(thread) ||
280                              thread_is_stopped(thread),
281                              &lwi);
282         }
283
284         return rc;
285 }
286
287 /**
288  * Stop parent FID verification thread.
289  *
290  * \param[in] ofd       OFD device
291  *
292  * \retval              0 on successful start of thread
293  * \retval              -EALREADY if thread is already stopped
294  */
295 int ofd_stop_inconsistency_verification_thread(struct ofd_device *ofd)
296 {
297         struct ptlrpc_thread    *thread = &ofd->ofd_inconsistency_thread;
298         struct l_wait_info       lwi    = { 0 };
299
300         spin_lock(&ofd->ofd_inconsistency_lock);
301         if (thread_is_init(thread) || thread_is_stopped(thread)) {
302                 spin_unlock(&ofd->ofd_inconsistency_lock);
303
304                 return -EALREADY;
305         }
306
307         thread_set_flags(thread, SVC_STOPPING);
308         spin_unlock(&ofd->ofd_inconsistency_lock);
309         wake_up_all(&thread->t_ctl_waitq);
310         l_wait_event(thread->t_ctl_waitq,
311                      thread_is_stopped(thread),
312                      &lwi);
313
314         return 0;
315 }
316
317 /**
318  * Add new item for parent FID verification.
319  *
320  * Prepare new verification item and pass it to the dedicated
321  * verification thread for further processing.
322  *
323  * \param[in] env       execution environment
324  * \param[in] fo        OFD object
325  * \param[in] oa        OBDO structure with PFID
326  */
327 static void ofd_add_inconsistency_item(const struct lu_env *env,
328                                        struct ofd_object *fo, struct obdo *oa)
329 {
330         struct ofd_device *ofd = ofd_obj2dev(fo);
331         struct ofd_inconsistency_item *oii;
332         struct filter_fid *ff;
333         bool wakeup = false;
334
335         OBD_ALLOC_PTR(oii);
336         if (oii == NULL)
337                 return;
338
339         INIT_LIST_HEAD(&oii->oii_list);
340         lu_object_get(&fo->ofo_obj.do_lu);
341         oii->oii_obj = fo;
342         ff = &oii->oii_ff;
343         ff->ff_parent.f_seq = oa->o_parent_seq;
344         ff->ff_parent.f_oid = oa->o_parent_oid;
345         ff->ff_parent.f_stripe_idx = oa->o_stripe_idx;
346         ff->ff_layout = oa->o_layout;
347
348         spin_lock(&ofd->ofd_inconsistency_lock);
349         if (fo->ofo_pfid_checking || fo->ofo_pfid_verified) {
350                 spin_unlock(&ofd->ofd_inconsistency_lock);
351                 OBD_FREE_PTR(oii);
352
353                 return;
354         }
355
356         fo->ofo_pfid_checking = 1;
357         if (list_empty(&ofd->ofd_inconsistency_list))
358                 wakeup = true;
359         list_add_tail(&oii->oii_list, &ofd->ofd_inconsistency_list);
360         spin_unlock(&ofd->ofd_inconsistency_lock);
361         if (wakeup)
362                 wake_up_all(&ofd->ofd_inconsistency_thread.t_ctl_waitq);
363
364         /* XXX: When the found inconsistency exceeds some threshold,
365          *      we can trigger the LFSCK to scan part of the system
366          *      or the whole system, which depends on how to define
367          *      the threshold, a simple way maybe like that: define
368          *      the absolute value of how many inconsisteny allowed
369          *      to be repaired via self detect/repair mechanism, if
370          *      exceeded, then trigger the LFSCK to scan the layout
371          *      inconsistency within the whole system. */
372 }
373
374 /**
375  * Verify parent FID of an object.
376  *
377  * Check the parent FID is sane and start extended
378  * verification procedure otherwise.
379  *
380  * \param[in] env       execution environment
381  * \param[in] fo        OFD object
382  * \param[in] oa        OBDO structure with PFID
383  *
384  * \retval              0 on successful verification
385  * \retval              -EINPROGRESS if PFID is being repaired
386  * \retval              -EPERM if PFID was verified but still insane
387  */
388 int ofd_verify_ff(const struct lu_env *env, struct ofd_object *fo,
389                   struct obdo *oa)
390 {
391         struct lu_fid *pfid = &fo->ofo_ff.ff_parent;
392         int rc = 0;
393         ENTRY;
394
395         if (fid_is_sane(pfid)) {
396                 if (likely(oa->o_parent_seq == pfid->f_seq &&
397                            oa->o_parent_oid == pfid->f_oid &&
398                            oa->o_stripe_idx == pfid->f_stripe_idx))
399                         RETURN(0);
400
401                 if (fo->ofo_pfid_verified)
402                         RETURN(-EPERM);
403         }
404
405         /* The OST-object may be inconsistent, and we need further verification.
406          * To avoid block the RPC service thread, return -EINPROGRESS to client
407          * and make it retry later. */
408         if (fo->ofo_pfid_checking)
409                 RETURN(-EINPROGRESS);
410
411         rc = ofd_object_ff_load(env, fo);
412         if (rc == -ENODATA)
413                 RETURN(0);
414
415         if (rc < 0)
416                 RETURN(rc);
417
418         if (likely(oa->o_parent_seq == pfid->f_seq &&
419                    oa->o_parent_oid == pfid->f_oid &&
420                    oa->o_stripe_idx == pfid->f_stripe_idx))
421                 RETURN(0);
422
423         /* Push it to the dedicated thread for further verification. */
424         ofd_add_inconsistency_item(env, fo, oa);
425
426         RETURN(-EINPROGRESS);
427 }
428
429 /**
430  * Prepare buffers for read request processing.
431  *
432  * This function converts remote buffers from client to local buffers
433  * and prepares the latter.
434  *
435  * \param[in] env       execution environment
436  * \param[in] exp       OBD export of client
437  * \param[in] ofd       OFD device
438  * \param[in] fid       FID of object
439  * \param[in] la        object attributes
440  * \param[in] oa        OBDO structure from client
441  * \param[in] niocount  number of remote buffers
442  * \param[in] rnb       remote buffers
443  * \param[in] nr_local  number of local buffers
444  * \param[in] lnb       local buffers
445  * \param[in] jobid     job ID name
446  *
447  * \retval              0 on successful prepare
448  * \retval              negative value on error
449  */
450 static int ofd_preprw_read(const struct lu_env *env, struct obd_export *exp,
451                            struct ofd_device *ofd, const struct lu_fid *fid,
452                            struct lu_attr *la, struct obdo *oa, int niocount,
453                            struct niobuf_remote *rnb, int *nr_local,
454                            struct niobuf_local *lnb, char *jobid)
455 {
456         struct ofd_object *fo;
457         int i, j, rc, tot_bytes = 0;
458         enum dt_bufs_type dbt = DT_BUFS_TYPE_READ;
459
460         ENTRY;
461         LASSERT(env != NULL);
462
463         fo = ofd_object_find(env, ofd, fid);
464         if (IS_ERR(fo))
465                 RETURN(PTR_ERR(fo));
466         LASSERT(fo != NULL);
467
468         ofd_read_lock(env, fo);
469         if (!ofd_object_exists(fo))
470                 GOTO(unlock, rc = -ENOENT);
471
472         if (ofd->ofd_lfsck_verify_pfid && oa->o_valid & OBD_MD_FLFID) {
473                 rc = ofd_verify_ff(env, fo, oa);
474                 if (rc != 0)
475                         GOTO(unlock, rc);
476         }
477
478         if (ptlrpc_connection_is_local(exp->exp_connection))
479                 dbt |= DT_BUFS_TYPE_LOCAL;
480
481         for (*nr_local = 0, i = 0, j = 0; i < niocount; i++) {
482                 rc = dt_bufs_get(env, ofd_object_child(fo), rnb + i,
483                                  lnb + j, dbt);
484                 if (unlikely(rc < 0))
485                         GOTO(buf_put, rc);
486                 LASSERT(rc <= PTLRPC_MAX_BRW_PAGES);
487                 /* correct index for local buffers to continue with */
488                 j += rc;
489                 *nr_local += rc;
490                 LASSERT(j <= PTLRPC_MAX_BRW_PAGES);
491                 tot_bytes += rnb[i].rnb_len;
492         }
493
494         LASSERT(*nr_local > 0 && *nr_local <= PTLRPC_MAX_BRW_PAGES);
495         rc = dt_attr_get(env, ofd_object_child(fo), la);
496         if (unlikely(rc))
497                 GOTO(buf_put, rc);
498
499         rc = dt_read_prep(env, ofd_object_child(fo), lnb, *nr_local);
500         if (unlikely(rc))
501                 GOTO(buf_put, rc);
502
503         ofd_counter_incr(exp, LPROC_OFD_STATS_READ, jobid, tot_bytes);
504         RETURN(0);
505
506 buf_put:
507         dt_bufs_put(env, ofd_object_child(fo), lnb, *nr_local);
508 unlock:
509         ofd_read_unlock(env, fo);
510         ofd_object_put(env, fo);
511         return rc;
512 }
513
514 /**
515  * Prepare buffers for write request processing.
516  *
517  * This function converts remote buffers from client to local buffers
518  * and prepares the latter. If there is recovery in progress and required
519  * object is missing then it can be re-created before write.
520  *
521  * \param[in] env       execution environment
522  * \param[in] exp       OBD export of client
523  * \param[in] ofd       OFD device
524  * \param[in] fid       FID of object
525  * \param[in] la        object attributes
526  * \param[in] oa        OBDO structure from client
527  * \param[in] objcount  always 1
528  * \param[in] obj       object data
529  * \param[in] rnb       remote buffers
530  * \param[in] nr_local  number of local buffers
531  * \param[in] lnb       local buffers
532  * \param[in] jobid     job ID name
533  *
534  * \retval              0 on successful prepare
535  * \retval              negative value on error
536  */
537 static int ofd_preprw_write(const struct lu_env *env, struct obd_export *exp,
538                             struct ofd_device *ofd, const struct lu_fid *fid,
539                             struct lu_attr *la, struct obdo *oa,
540                             int objcount, struct obd_ioobj *obj,
541                             struct niobuf_remote *rnb, int *nr_local,
542                             struct niobuf_local *lnb, char *jobid)
543 {
544         struct ofd_object *fo;
545         int i, j, k, rc = 0, tot_bytes = 0;
546         enum dt_bufs_type dbt = DT_BUFS_TYPE_WRITE;
547
548         ENTRY;
549         LASSERT(env != NULL);
550         LASSERT(objcount == 1);
551
552         if (unlikely(exp->exp_obd->obd_recovering)) {
553                 u64 seq = fid_seq(fid);
554                 u64 oid = fid_oid(fid);
555                 struct ofd_seq *oseq;
556
557                 oseq = ofd_seq_load(env, ofd, seq);
558                 if (IS_ERR(oseq)) {
559                         CERROR("%s: Can't find FID Sequence %#llx: rc = %d\n",
560                                ofd_name(ofd), seq, (int)PTR_ERR(oseq));
561                         GOTO(out, rc = -EINVAL);
562                 }
563
564                 if (oid > ofd_seq_last_oid(oseq)) {
565                         int sync = 0;
566                         int diff;
567
568                         mutex_lock(&oseq->os_create_lock);
569                         diff = oid - ofd_seq_last_oid(oseq);
570
571                         /* Do sync create if the seq is about to used up */
572                         if (fid_seq_is_idif(seq) || fid_seq_is_mdt0(seq)) {
573                                 if (unlikely(oid >= IDIF_MAX_OID - 1))
574                                         sync = 1;
575                         } else if (fid_seq_is_norm(seq)) {
576                                 if (unlikely(oid >=
577                                              LUSTRE_DATA_SEQ_MAX_WIDTH - 1))
578                                         sync = 1;
579                         } else {
580                                 CERROR("%s : invalid o_seq "DOSTID"\n",
581                                        ofd_name(ofd), POSTID(&oa->o_oi));
582                                 mutex_unlock(&oseq->os_create_lock);
583                                 ofd_seq_put(env, oseq);
584                                 GOTO(out, rc = -EINVAL);
585                         }
586
587                         while (diff > 0) {
588                                 u64 next_id = ofd_seq_last_oid(oseq) + 1;
589                                 int count = ofd_precreate_batch(ofd, diff);
590
591                                 rc = ofd_precreate_objects(env, ofd, next_id,
592                                                            oseq, count, sync);
593                                 if (rc < 0) {
594                                         mutex_unlock(&oseq->os_create_lock);
595                                         ofd_seq_put(env, oseq);
596                                         GOTO(out, rc);
597                                 }
598
599                                 diff -= rc;
600                         }
601
602                         mutex_unlock(&oseq->os_create_lock);
603                 }
604
605                 ofd_seq_put(env, oseq);
606         }
607
608         fo = ofd_object_find(env, ofd, fid);
609         if (IS_ERR(fo))
610                 GOTO(out, rc = PTR_ERR(fo));
611         LASSERT(fo != NULL);
612
613         ofd_read_lock(env, fo);
614         if (!ofd_object_exists(fo)) {
615                 CERROR("%s: BRW to missing obj "DOSTID"\n",
616                        exp->exp_obd->obd_name, POSTID(&obj->ioo_oid));
617                 ofd_read_unlock(env, fo);
618                 ofd_object_put(env, fo);
619                 GOTO(out, rc = -ENOENT);
620         }
621
622         if (ofd->ofd_lfsck_verify_pfid && oa->o_valid & OBD_MD_FLFID) {
623                 rc = ofd_verify_ff(env, fo, oa);
624                 if (rc != 0) {
625                         ofd_read_unlock(env, fo);
626                         ofd_object_put(env, fo);
627                         GOTO(out, rc);
628                 }
629         }
630
631         /* Process incoming grant info, set OBD_BRW_GRANTED flag and grant some
632          * space back if possible */
633         tgt_grant_prepare_write(env, exp, oa, rnb, obj->ioo_bufcnt);
634
635         if (ptlrpc_connection_is_local(exp->exp_connection))
636                 dbt |= DT_BUFS_TYPE_LOCAL;
637
638         /* parse remote buffers to local buffers and prepare the latter */
639         for (*nr_local = 0, i = 0, j = 0; i < obj->ioo_bufcnt; i++) {
640                 rc = dt_bufs_get(env, ofd_object_child(fo),
641                                  rnb + i, lnb + j, dbt);
642                 if (unlikely(rc < 0))
643                         GOTO(err, rc);
644                 LASSERT(rc <= PTLRPC_MAX_BRW_PAGES);
645                 /* correct index for local buffers to continue with */
646                 for (k = 0; k < rc; k++) {
647                         lnb[j+k].lnb_flags = rnb[i].rnb_flags;
648                         lnb[j+k].lnb_flags &= ~OBD_BRW_LOCALS;
649                         if (!(rnb[i].rnb_flags & OBD_BRW_GRANTED))
650                                 lnb[j+k].lnb_rc = -ENOSPC;
651                 }
652                 j += rc;
653                 *nr_local += rc;
654                 LASSERT(j <= PTLRPC_MAX_BRW_PAGES);
655                 tot_bytes += rnb[i].rnb_len;
656         }
657         LASSERT(*nr_local > 0 && *nr_local <= PTLRPC_MAX_BRW_PAGES);
658
659         rc = dt_write_prep(env, ofd_object_child(fo), lnb, *nr_local);
660         if (unlikely(rc != 0))
661                 GOTO(err, rc);
662
663         ofd_counter_incr(exp, LPROC_OFD_STATS_WRITE, jobid, tot_bytes);
664         RETURN(0);
665 err:
666         dt_bufs_put(env, ofd_object_child(fo), lnb, *nr_local);
667         ofd_read_unlock(env, fo);
668         ofd_object_put(env, fo);
669         /* tgt_grant_prepare_write() was called, so we must commit */
670         tgt_grant_commit(exp, oa->o_grant_used, rc);
671 out:
672         /* let's still process incoming grant information packed in the oa,
673          * but without enforcing grant since we won't proceed with the write.
674          * Just like a read request actually. */
675         tgt_grant_prepare_read(env, exp, oa);
676         return rc;
677 }
678
679 /**
680  * Prepare bulk IO requests for processing.
681  *
682  * This function does initial checks of IO and calls corresponding
683  * functions for read/write processing.
684  *
685  * \param[in] env       execution environment
686  * \param[in] cmd       IO type (read/write)
687  * \param[in] exp       OBD export of client
688  * \param[in] oa        OBDO structure from request
689  * \param[in] objcount  always 1
690  * \param[in] obj       object data
691  * \param[in] rnb       remote buffers
692  * \param[in] nr_local  number of local buffers
693  * \param[in] lnb       local buffers
694  *
695  * \retval              0 on successful prepare
696  * \retval              negative value on error
697  */
698 int ofd_preprw(const struct lu_env *env, int cmd, struct obd_export *exp,
699                struct obdo *oa, int objcount, struct obd_ioobj *obj,
700                struct niobuf_remote *rnb, int *nr_local,
701                struct niobuf_local *lnb)
702 {
703         struct tgt_session_info *tsi = tgt_ses_info(env);
704         struct ofd_device       *ofd = ofd_exp(exp);
705         struct ofd_thread_info  *info;
706         char                    *jobid;
707         const struct lu_fid     *fid = &oa->o_oi.oi_fid;
708         int                      rc = 0;
709
710         if (*nr_local > PTLRPC_MAX_BRW_PAGES) {
711                 CERROR("%s: bulk has too many pages %d, which exceeds the"
712                        "maximum pages per RPC of %d\n",
713                        exp->exp_obd->obd_name, *nr_local, PTLRPC_MAX_BRW_PAGES);
714                 RETURN(-EPROTO);
715         }
716
717         if (tgt_ses_req(tsi) == NULL) { /* echo client case */
718                 info = ofd_info_init(env, exp);
719                 jobid = NULL;
720         } else {
721                 info = tsi2ofd_info(tsi);
722                 jobid = tsi->tsi_jobid;
723         }
724
725         LASSERT(oa != NULL);
726
727         if (OBD_FAIL_CHECK(OBD_FAIL_SRV_ENOENT)) {
728                 struct ofd_seq          *oseq;
729
730                 oseq = ofd_seq_load(env, ofd, ostid_seq(&oa->o_oi));
731                 if (IS_ERR(oseq)) {
732                         CERROR("%s: Can not find seq for "DOSTID
733                                ": rc = %ld\n", ofd_name(ofd), POSTID(&oa->o_oi),
734                                PTR_ERR(oseq));
735                         RETURN(-EINVAL);
736                 }
737
738                 if (oseq->os_destroys_in_progress == 0) {
739                         /* don't fail lookups for orphan recovery, it causes
740                          * later LBUGs when objects still exist during
741                          * precreate */
742                         ofd_seq_put(env, oseq);
743                         RETURN(-ENOENT);
744                 }
745                 ofd_seq_put(env, oseq);
746         }
747
748         LASSERT(objcount == 1);
749         LASSERT(obj->ioo_bufcnt > 0);
750
751         if (cmd == OBD_BRW_WRITE) {
752                 la_from_obdo(&info->fti_attr, oa, OBD_MD_FLGETATTR);
753                 rc = ofd_preprw_write(env, exp, ofd, fid, &info->fti_attr, oa,
754                                       objcount, obj, rnb, nr_local, lnb, jobid);
755         } else if (cmd == OBD_BRW_READ) {
756                 tgt_grant_prepare_read(env, exp, oa);
757                 rc = ofd_preprw_read(env, exp, ofd, fid, &info->fti_attr, oa,
758                                      obj->ioo_bufcnt, rnb, nr_local, lnb,
759                                      jobid);
760                 obdo_from_la(oa, &info->fti_attr, LA_ATIME);
761         } else {
762                 CERROR("%s: wrong cmd %d received!\n",
763                        exp->exp_obd->obd_name, cmd);
764                 rc = -EPROTO;
765         }
766         RETURN(rc);
767 }
768
769 /**
770  * Drop reference on local buffers for read bulk IO.
771  *
772  * This will free all local buffers use by this read request.
773  *
774  * \param[in] env       execution environment
775  * \param[in] ofd       OFD device
776  * \param[in] fid       object FID
777  * \param[in] objcount  always 1
778  * \param[in] niocount  number of local buffers
779  * \param[in] lnb       local buffers
780  *
781  * \retval              0 on successful execution
782  * \retval              negative value on error
783  */
784 static int
785 ofd_commitrw_read(const struct lu_env *env, struct ofd_device *ofd,
786                   const struct lu_fid *fid, int objcount, int niocount,
787                   struct niobuf_local *lnb)
788 {
789         struct ofd_object *fo;
790
791         ENTRY;
792
793         LASSERT(niocount > 0);
794
795         fo = ofd_object_find(env, ofd, fid);
796         if (IS_ERR(fo))
797                 RETURN(PTR_ERR(fo));
798         LASSERT(fo != NULL);
799         LASSERT(ofd_object_exists(fo));
800         dt_bufs_put(env, ofd_object_child(fo), lnb, niocount);
801
802         ofd_read_unlock(env, fo);
803         ofd_object_put(env, fo);
804         /* second put is pair to object_get in ofd_preprw_read */
805         ofd_object_put(env, fo);
806
807         RETURN(0);
808 }
809
810 /**
811  * Set attributes of object during write bulk IO processing.
812  *
813  * Change object attributes and write parent FID into extended
814  * attributes when needed.
815  *
816  * \param[in] env       execution environment
817  * \param[in] ofd       OFD device
818  * \param[in] ofd_obj   OFD object
819  * \param[in] la        object attributes
820  * \param[in] ff        parent FID
821  *
822  * \retval              0 on successful attributes update
823  * \retval              negative value on error
824  */
825 static int
826 ofd_write_attr_set(const struct lu_env *env, struct ofd_device *ofd,
827                    struct ofd_object *ofd_obj, struct lu_attr *la,
828                    struct filter_fid *ff)
829 {
830         struct ofd_thread_info  *info = ofd_info(env);
831         __u64                    valid = la->la_valid;
832         int                      rc;
833         struct thandle          *th;
834         struct dt_object        *dt_obj;
835         int                      ff_needed = 0;
836
837         ENTRY;
838
839         LASSERT(la);
840
841         dt_obj = ofd_object_child(ofd_obj);
842         LASSERT(dt_obj != NULL);
843
844         la->la_valid &= LA_UID | LA_GID | LA_PROJID;
845
846         rc = ofd_attr_handle_id(env, ofd_obj, la, 0 /* !is_setattr */);
847         if (rc != 0)
848                 GOTO(out, rc);
849
850         if (ff != NULL) {
851                 rc = ofd_object_ff_load(env, ofd_obj);
852                 if (rc == -ENODATA)
853                         ff_needed = 1;
854                 else if (rc < 0)
855                         GOTO(out, rc);
856         }
857
858         if (!la->la_valid && !ff_needed)
859                 /* no attributes to set */
860                 GOTO(out, rc = 0);
861
862         th = ofd_trans_create(env, ofd);
863         if (IS_ERR(th))
864                 GOTO(out, rc = PTR_ERR(th));
865
866         if (la->la_valid) {
867                 rc = dt_declare_attr_set(env, dt_obj, la, th);
868                 if (rc)
869                         GOTO(out_tx, rc);
870         }
871
872         if (ff_needed) {
873                 if (OBD_FAIL_CHECK(OBD_FAIL_LFSCK_UNMATCHED_PAIR1))
874                         ff->ff_parent.f_oid = cpu_to_le32(1UL << 31);
875                 else if (OBD_FAIL_CHECK(OBD_FAIL_LFSCK_UNMATCHED_PAIR2))
876                         le32_add_cpu(&ff->ff_parent.f_oid, -1);
877
878                 info->fti_buf.lb_buf = ff;
879                 info->fti_buf.lb_len = sizeof(*ff);
880                 rc = dt_declare_xattr_set(env, dt_obj, &info->fti_buf,
881                                           XATTR_NAME_FID, 0, th);
882                 if (rc)
883                         GOTO(out_tx, rc);
884         }
885
886         /* We don't need a transno for this operation which will be re-executed
887          * anyway when the OST_WRITE (with a transno assigned) is replayed */
888         rc = dt_trans_start_local(env, ofd->ofd_osd , th);
889         if (rc)
890                 GOTO(out_tx, rc);
891
892         /* set uid/gid/projid */
893         if (la->la_valid) {
894                 rc = dt_attr_set(env, dt_obj, la, th);
895                 if (rc)
896                         GOTO(out_tx, rc);
897         }
898
899         /* set filter fid EA */
900         if (ff_needed) {
901                 if (OBD_FAIL_CHECK(OBD_FAIL_LFSCK_NOPFID))
902                         GOTO(out_tx, rc);
903
904                 rc = dt_xattr_set(env, dt_obj, &info->fti_buf, XATTR_NAME_FID,
905                                   0, th);
906                 if (!rc)
907                         filter_fid_le_to_cpu(&ofd_obj->ofo_ff, ff, sizeof(*ff));
908         }
909
910         GOTO(out_tx, rc);
911
912 out_tx:
913         dt_trans_stop(env, ofd->ofd_osd, th);
914 out:
915         la->la_valid = valid;
916         return rc;
917 }
918
919 struct ofd_soft_sync_callback {
920         struct dt_txn_commit_cb  ossc_cb;
921         struct obd_export       *ossc_exp;
922 };
923
924 /**
925  * Callback function for "soft sync" update.
926  *
927  * Reset fed_soft_sync_count upon committing the "soft_sync" update.
928  * See ofd_soft_sync_cb_add() below for more details on soft sync.
929  *
930  * \param[in] env       execution environment
931  * \param[in] th        transaction handle
932  * \param[in] cb        callback data
933  * \param[in] err       error code
934  */
935 static void ofd_cb_soft_sync(struct lu_env *env, struct thandle *th,
936                              struct dt_txn_commit_cb *cb, int err)
937 {
938         struct ofd_soft_sync_callback   *ossc;
939
940         ossc = container_of(cb, struct ofd_soft_sync_callback, ossc_cb);
941
942         CDEBUG(D_INODE, "export %p soft sync count is reset\n", ossc->ossc_exp);
943         atomic_set(&ossc->ossc_exp->exp_filter_data.fed_soft_sync_count, 0);
944
945         class_export_cb_put(ossc->ossc_exp);
946         OBD_FREE_PTR(ossc);
947 }
948
949 /**
950  * Add callback for "soft sync" processing.
951  *
952  * The "soft sync" mechanism does asynchronous commit when OBD_BRW_SOFT_SYNC
953  * flag is set in client buffers. The intention is for this operation to
954  * commit pages belonging to a client which has "too many" outstanding
955  * unstable pages in its cache. See LU-2139 for details.
956  *
957  * This function adds callback to be called when commit is done.
958  *
959  * \param[in] th        transaction handle
960  * \param[in] exp       OBD export of client
961  *
962  * \retval              0 on successful callback adding
963  * \retval              negative value on error
964  */
965 static int ofd_soft_sync_cb_add(struct thandle *th, struct obd_export *exp)
966 {
967         struct ofd_soft_sync_callback           *ossc;
968         struct dt_txn_commit_cb                 *dcb;
969         int                                      rc;
970
971         OBD_ALLOC_PTR(ossc);
972         if (ossc == NULL)
973                 return -ENOMEM;
974
975         ossc->ossc_exp = class_export_cb_get(exp);
976
977         dcb = &ossc->ossc_cb;
978         dcb->dcb_func = ofd_cb_soft_sync;
979         INIT_LIST_HEAD(&dcb->dcb_linkage);
980         strlcpy(dcb->dcb_name, "ofd_cb_soft_sync", sizeof(dcb->dcb_name));
981
982         rc = dt_trans_cb_add(th, dcb);
983         if (rc) {
984                 class_export_cb_put(exp);
985                 OBD_FREE_PTR(ossc);
986         }
987
988         return rc;
989 }
990
991 /**
992  * Commit bulk IO buffers to the storage.
993  *
994  * This function finalizes write IO processing by writing data to the disk.
995  * That write can be synchronous or asynchronous depending on buffers flags.
996  *
997  * \param[in] env       execution environment
998  * \param[in] exp       OBD export of client
999  * \param[in] ofd       OFD device
1000  * \param[in] fid       FID of object
1001  * \param[in] la        object attributes
1002  * \param[in] ff        parent FID of object
1003  * \param[in] objcount  always 1
1004  * \param[in] niocount  number of local buffers
1005  * \param[in] lnb       local buffers
1006  * \param[in] granted   grant space consumed for the bulk I/O
1007  * \param[in] old_rc    result of processing at this point
1008  *
1009  * \retval              0 on successful commit
1010  * \retval              negative value on error
1011  */
1012 static int
1013 ofd_commitrw_write(const struct lu_env *env, struct obd_export *exp,
1014                    struct ofd_device *ofd, const struct lu_fid *fid,
1015                    struct lu_attr *la, struct filter_fid *ff, int objcount,
1016                    int niocount, struct niobuf_local *lnb,
1017                    unsigned long granted, int old_rc)
1018 {
1019         struct filter_export_data *fed = &exp->exp_filter_data;
1020         struct ofd_object *fo;
1021         struct dt_object *o;
1022         struct thandle *th;
1023         int rc = 0;
1024         int rc2 = 0;
1025         int retries = 0;
1026         int i;
1027         bool soft_sync = false;
1028         bool cb_registered = false;
1029         bool fake_write = false;
1030
1031         ENTRY;
1032
1033         LASSERT(objcount == 1);
1034
1035         fo = ofd_object_find(env, ofd, fid);
1036         LASSERT(fo != NULL);
1037         LASSERT(ofd_object_exists(fo));
1038
1039         o = ofd_object_child(fo);
1040         LASSERT(o != NULL);
1041
1042         if (old_rc)
1043                 GOTO(out, rc = old_rc);
1044
1045         /*
1046          * The first write to each object must set some attributes.  It is
1047          * important to set the uid/gid before calling
1048          * dt_declare_write_commit() since quota enforcement is now handled in
1049          * declare phases.
1050          */
1051         rc = ofd_write_attr_set(env, ofd, fo, la, ff);
1052         if (rc)
1053                 GOTO(out, rc);
1054
1055         la->la_valid &= LA_ATIME | LA_MTIME | LA_CTIME;
1056
1057         /* do fake write, to simulate the write case for performance testing */
1058         if (OBD_FAIL_CHECK(OBD_FAIL_OST_FAKE_RW)) {
1059                 struct niobuf_local *last = &lnb[niocount - 1];
1060                 __u64 file_size = last->lnb_file_offset + last->lnb_len;
1061                 __u64 valid = la->la_valid;
1062
1063                 la->la_valid = LA_SIZE;
1064                 la->la_size = 0;
1065                 rc = dt_attr_get(env, o, la);
1066                 if (rc < 0 && rc != -ENOENT)
1067                         GOTO(out, rc);
1068
1069                 if (file_size < la->la_size)
1070                         file_size = la->la_size;
1071
1072                 /* dirty inode by setting file size */
1073                 la->la_valid = valid | LA_SIZE;
1074                 la->la_size = file_size;
1075
1076                 fake_write = true;
1077         }
1078
1079 retry:
1080         th = ofd_trans_create(env, ofd);
1081         if (IS_ERR(th))
1082                 GOTO(out, rc = PTR_ERR(th));
1083
1084         th->th_sync |= ofd->ofd_syncjournal;
1085         if (th->th_sync == 0) {
1086                 for (i = 0; i < niocount; i++) {
1087                         if (!(lnb[i].lnb_flags & OBD_BRW_ASYNC)) {
1088                                 th->th_sync = 1;
1089                                 break;
1090                         }
1091                         if (lnb[i].lnb_flags & OBD_BRW_SOFT_SYNC)
1092                                 soft_sync = true;
1093                 }
1094         }
1095
1096         if (OBD_FAIL_CHECK(OBD_FAIL_OST_DQACQ_NET))
1097                 GOTO(out_stop, rc = -EINPROGRESS);
1098
1099         if (likely(!fake_write)) {
1100                 rc = dt_declare_write_commit(env, o, lnb, niocount, th);
1101                 if (rc)
1102                         GOTO(out_stop, rc);
1103         }
1104
1105         if (la->la_valid) {
1106                 /* update [mac]time if needed */
1107                 rc = dt_declare_attr_set(env, o, la, th);
1108                 if (rc)
1109                         GOTO(out_stop, rc);
1110         }
1111
1112         rc = ofd_trans_start(env, ofd, fo, th);
1113         if (rc)
1114                 GOTO(out_stop, rc);
1115
1116         if (likely(!fake_write)) {
1117                 rc = dt_write_commit(env, o, lnb, niocount, th);
1118                 if (rc)
1119                         GOTO(out_stop, rc);
1120         }
1121
1122         if (la->la_valid) {
1123                 rc = dt_attr_set(env, o, la, th);
1124                 if (rc)
1125                         GOTO(out_stop, rc);
1126         }
1127
1128         /* get attr to return */
1129         rc = dt_attr_get(env, o, la);
1130
1131 out_stop:
1132         /* Force commit to make the just-deleted blocks
1133          * reusable. LU-456 */
1134         if (rc == -ENOSPC)
1135                 th->th_sync = 1;
1136
1137         /* do this before trans stop in case commit has finished */
1138         if (!th->th_sync && soft_sync && !cb_registered) {
1139                 ofd_soft_sync_cb_add(th, exp);
1140                 cb_registered = true;
1141         }
1142
1143         if (rc == 0 && granted > 0) {
1144                 if (tgt_grant_commit_cb_add(th, exp, granted) == 0)
1145                         granted = 0;
1146         }
1147
1148         rc2 = ofd_trans_stop(env, ofd, th, rc);
1149         if (!rc)
1150                 rc = rc2;
1151         if (rc == -ENOSPC && retries++ < 3) {
1152                 CDEBUG(D_INODE, "retry after force commit, retries:%d\n",
1153                        retries);
1154                 goto retry;
1155         }
1156
1157         if (!soft_sync)
1158                 /* reset fed_soft_sync_count upon non-SOFT_SYNC RPC */
1159                 atomic_set(&fed->fed_soft_sync_count, 0);
1160         else if (atomic_inc_return(&fed->fed_soft_sync_count) ==
1161                  ofd->ofd_soft_sync_limit)
1162                 dt_commit_async(env, ofd->ofd_osd);
1163
1164 out:
1165         dt_bufs_put(env, o, lnb, niocount);
1166         ofd_read_unlock(env, fo);
1167         ofd_object_put(env, fo);
1168         /* second put is pair to object_get in ofd_preprw_write */
1169         ofd_object_put(env, fo);
1170         if (granted > 0)
1171                 tgt_grant_commit(exp, granted, old_rc);
1172         RETURN(rc);
1173 }
1174
1175 /**
1176  * Commit bulk IO to the storage.
1177  *
1178  * This is companion function to the ofd_preprw(). It finishes bulk IO
1179  * request processing by committing buffers to the storage (WRITE) and/or
1180  * freeing those buffers (read/write). See ofd_commitrw_read() and
1181  * ofd_commitrw_write() for details about each type of IO.
1182  *
1183  * \param[in] env       execution environment
1184  * \param[in] cmd       IO type (READ/WRITE)
1185  * \param[in] exp       OBD export of client
1186  * \param[in] oa        OBDO structure from client
1187  * \param[in] objcount  always 1
1188  * \param[in] obj       object data
1189  * \param[in] rnb       remote buffers
1190  * \param[in] npages    number of local buffers
1191  * \param[in] lnb       local buffers
1192  * \param[in] old_rc    result of processing at this point
1193  *
1194  * \retval              0 on successful commit
1195  * \retval              negative value on error
1196  */
1197 int ofd_commitrw(const struct lu_env *env, int cmd, struct obd_export *exp,
1198                  struct obdo *oa, int objcount, struct obd_ioobj *obj,
1199                  struct niobuf_remote *rnb, int npages,
1200                  struct niobuf_local *lnb, int old_rc)
1201 {
1202         struct ofd_thread_info  *info = ofd_info(env);
1203         struct ofd_mod_data     *fmd;
1204         __u64                    valid;
1205         struct ofd_device       *ofd = ofd_exp(exp);
1206         struct filter_fid       *ff = NULL;
1207         const struct lu_fid     *fid = &oa->o_oi.oi_fid;
1208         int                      rc = 0;
1209
1210         LASSERT(npages > 0);
1211
1212         if (cmd == OBD_BRW_WRITE) {
1213                 struct lu_nodemap *nodemap;
1214
1215                 /* Don't update timestamps if this write is older than a
1216                  * setattr which modifies the timestamps. b=10150 */
1217
1218                 /* XXX when we start having persistent reservations this needs
1219                  * to be changed to ofd_fmd_get() to create the fmd if it
1220                  * doesn't already exist so we can store the reservation handle
1221                  * there. */
1222                 valid = OBD_MD_FLUID | OBD_MD_FLGID | OBD_MD_FLPROJID;
1223                 fmd = ofd_fmd_find(exp, fid);
1224                 if (!fmd || fmd->fmd_mactime_xid < info->fti_xid)
1225                         valid |= OBD_MD_FLATIME | OBD_MD_FLMTIME |
1226                                  OBD_MD_FLCTIME;
1227                 ofd_fmd_put(exp, fmd);
1228                 la_from_obdo(&info->fti_attr, oa, valid);
1229
1230                 if (oa->o_valid & OBD_MD_FLFID) {
1231                         ff = &info->fti_mds_fid;
1232                         ofd_prepare_fidea(ff, oa);
1233                 }
1234
1235                 rc = ofd_commitrw_write(env, exp, ofd, fid, &info->fti_attr,
1236                                         ff, objcount, npages, lnb,
1237                                         oa->o_grant_used, old_rc);
1238                 if (rc == 0)
1239                         obdo_from_la(oa, &info->fti_attr,
1240                                      OFD_VALID_FLAGS | LA_GID | LA_UID |
1241                                      LA_PROJID);
1242                 else
1243                         obdo_from_la(oa, &info->fti_attr, LA_GID | LA_UID |
1244                                      LA_PROJID);
1245
1246                 /* don't report overquota flag if we failed before reaching
1247                  * commit */
1248                 if (old_rc == 0 && (rc == 0 || rc == -EDQUOT)) {
1249                         /* return the overquota flags to client */
1250                         if (lnb[0].lnb_flags & OBD_BRW_OVER_USRQUOTA) {
1251                                 if (oa->o_valid & OBD_MD_FLFLAGS)
1252                                         oa->o_flags |= OBD_FL_NO_USRQUOTA;
1253                                 else
1254                                         oa->o_flags = OBD_FL_NO_USRQUOTA;
1255                         }
1256
1257                         if (lnb[0].lnb_flags & OBD_BRW_OVER_GRPQUOTA) {
1258                                 if (oa->o_valid & OBD_MD_FLFLAGS)
1259                                         oa->o_flags |= OBD_FL_NO_GRPQUOTA;
1260                                 else
1261                                         oa->o_flags = OBD_FL_NO_GRPQUOTA;
1262                         }
1263                         if (lnb[0].lnb_flags & OBD_BRW_OVER_PRJQUOTA) {
1264                                 if (oa->o_valid & OBD_MD_FLFLAGS)
1265                                         oa->o_flags |= OBD_FL_NO_PRJQUOTA;
1266                                 else
1267                                         oa->o_flags = OBD_FL_NO_PRJQUOTA;
1268                         }
1269
1270                         oa->o_valid |= OBD_MD_FLFLAGS;
1271                         oa->o_valid |= OBD_MD_FLALLQUOTA;
1272                 }
1273
1274                 /* Convert back to client IDs. LU-9671.
1275                  * nodemap_get_from_exp() may fail due to nodemap deactivated,
1276                  * server ID will be returned back to client in that case. */
1277                 nodemap = nodemap_get_from_exp(exp);
1278                 if (nodemap != NULL && !IS_ERR(nodemap)) {
1279                         oa->o_uid = nodemap_map_id(nodemap, NODEMAP_UID,
1280                                                    NODEMAP_FS_TO_CLIENT,
1281                                                    oa->o_uid);
1282                         oa->o_gid = nodemap_map_id(nodemap, NODEMAP_GID,
1283                                                    NODEMAP_FS_TO_CLIENT,
1284                                                    oa->o_gid);
1285                         nodemap_putref(nodemap);
1286                 }
1287         } else if (cmd == OBD_BRW_READ) {
1288                 struct ldlm_namespace *ns = ofd->ofd_namespace;
1289
1290                 /* If oa != NULL then ofd_preprw_read updated the inode
1291                  * atime and we should update the lvb so that other glimpses
1292                  * will also get the updated value. bug 5972 */
1293                 if (oa && ns && ns->ns_lvbo && ns->ns_lvbo->lvbo_update) {
1294                          struct ldlm_resource *rs = NULL;
1295
1296                         ost_fid_build_resid(fid, &info->fti_resid);
1297                         rs = ldlm_resource_get(ns, NULL, &info->fti_resid,
1298                                                LDLM_EXTENT, 0);
1299                         if (!IS_ERR(rs)) {
1300                                 ldlm_res_lvbo_update(rs, NULL, 1);
1301                                 ldlm_resource_putref(rs);
1302                         }
1303                 }
1304                 rc = ofd_commitrw_read(env, ofd, fid, objcount,
1305                                        npages, lnb);
1306                 if (old_rc)
1307                         rc = old_rc;
1308         } else {
1309                 LBUG();
1310                 rc = -EPROTO;
1311         }
1312
1313         RETURN(rc);
1314 }