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staging/lustre: get rid of obd_* typedefs
[mirror_ubuntu-hirsute-kernel.git] / drivers / staging / lustre / lustre / lov / lov_request.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) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
28 * Use is subject to license terms.
29 *
30 * Copyright (c) 2011, 2012, Intel Corporation.
31 */
32 /*
33 * This file is part of Lustre, http://www.lustre.org/
34 * Lustre is a trademark of Sun Microsystems, Inc.
35 */
36
37 #define DEBUG_SUBSYSTEM S_LOV
38
39 #include "../../include/linux/libcfs/libcfs.h"
40
41 #include "../include/obd_class.h"
42 #include "../include/obd_ost.h"
43 #include "../include/lustre/lustre_idl.h"
44 #include "lov_internal.h"
45
46 static void lov_init_set(struct lov_request_set *set)
47 {
48 set->set_count = 0;
49 atomic_set(&set->set_completes, 0);
50 atomic_set(&set->set_success, 0);
51 atomic_set(&set->set_finish_checked, 0);
52 set->set_cookies = NULL;
53 INIT_LIST_HEAD(&set->set_list);
54 atomic_set(&set->set_refcount, 1);
55 init_waitqueue_head(&set->set_waitq);
56 spin_lock_init(&set->set_lock);
57 }
58
59 void lov_finish_set(struct lov_request_set *set)
60 {
61 struct list_head *pos, *n;
62
63 LASSERT(set);
64 list_for_each_safe(pos, n, &set->set_list) {
65 struct lov_request *req = list_entry(pos,
66 struct lov_request,
67 rq_link);
68 list_del_init(&req->rq_link);
69
70 if (req->rq_oi.oi_oa)
71 OBDO_FREE(req->rq_oi.oi_oa);
72 if (req->rq_oi.oi_md)
73 OBD_FREE_LARGE(req->rq_oi.oi_md, req->rq_buflen);
74 if (req->rq_oi.oi_osfs)
75 OBD_FREE(req->rq_oi.oi_osfs,
76 sizeof(*req->rq_oi.oi_osfs));
77 OBD_FREE(req, sizeof(*req));
78 }
79
80 if (set->set_pga) {
81 int len = set->set_oabufs * sizeof(*set->set_pga);
82 OBD_FREE_LARGE(set->set_pga, len);
83 }
84 if (set->set_lockh)
85 lov_llh_put(set->set_lockh);
86
87 OBD_FREE(set, sizeof(*set));
88 }
89
90 int lov_set_finished(struct lov_request_set *set, int idempotent)
91 {
92 int completes = atomic_read(&set->set_completes);
93
94 CDEBUG(D_INFO, "check set %d/%d\n", completes, set->set_count);
95
96 if (completes == set->set_count) {
97 if (idempotent)
98 return 1;
99 if (atomic_inc_return(&set->set_finish_checked) == 1)
100 return 1;
101 }
102 return 0;
103 }
104
105 void lov_update_set(struct lov_request_set *set,
106 struct lov_request *req, int rc)
107 {
108 req->rq_complete = 1;
109 req->rq_rc = rc;
110
111 atomic_inc(&set->set_completes);
112 if (rc == 0)
113 atomic_inc(&set->set_success);
114
115 wake_up(&set->set_waitq);
116 }
117
118 int lov_update_common_set(struct lov_request_set *set,
119 struct lov_request *req, int rc)
120 {
121 struct lov_obd *lov = &set->set_exp->exp_obd->u.lov;
122
123 lov_update_set(set, req, rc);
124
125 /* grace error on inactive ost */
126 if (rc && !(lov->lov_tgts[req->rq_idx] &&
127 lov->lov_tgts[req->rq_idx]->ltd_active))
128 rc = 0;
129
130 /* FIXME in raid1 regime, should return 0 */
131 return rc;
132 }
133
134 void lov_set_add_req(struct lov_request *req, struct lov_request_set *set)
135 {
136 list_add_tail(&req->rq_link, &set->set_list);
137 set->set_count++;
138 req->rq_rqset = set;
139 }
140
141 static int lov_check_set(struct lov_obd *lov, int idx)
142 {
143 int rc;
144 struct lov_tgt_desc *tgt;
145
146 mutex_lock(&lov->lov_lock);
147 tgt = lov->lov_tgts[idx];
148 rc = !tgt || tgt->ltd_active ||
149 (tgt->ltd_exp &&
150 class_exp2cliimp(tgt->ltd_exp)->imp_connect_tried);
151 mutex_unlock(&lov->lov_lock);
152
153 return rc;
154 }
155
156 /* Check if the OSC connection exists and is active.
157 * If the OSC has not yet had a chance to connect to the OST the first time,
158 * wait once for it to connect instead of returning an error.
159 */
160 int lov_check_and_wait_active(struct lov_obd *lov, int ost_idx)
161 {
162 wait_queue_head_t waitq;
163 struct l_wait_info lwi;
164 struct lov_tgt_desc *tgt;
165 int rc = 0;
166
167 mutex_lock(&lov->lov_lock);
168
169 tgt = lov->lov_tgts[ost_idx];
170
171 if (unlikely(tgt == NULL))
172 GOTO(out, rc = 0);
173
174 if (likely(tgt->ltd_active))
175 GOTO(out, rc = 1);
176
177 if (tgt->ltd_exp && class_exp2cliimp(tgt->ltd_exp)->imp_connect_tried)
178 GOTO(out, rc = 0);
179
180 mutex_unlock(&lov->lov_lock);
181
182 init_waitqueue_head(&waitq);
183 lwi = LWI_TIMEOUT_INTERVAL(cfs_time_seconds(obd_timeout),
184 cfs_time_seconds(1), NULL, NULL);
185
186 rc = l_wait_event(waitq, lov_check_set(lov, ost_idx), &lwi);
187 if (tgt != NULL && tgt->ltd_active)
188 return 1;
189
190 return 0;
191
192 out:
193 mutex_unlock(&lov->lov_lock);
194 return rc;
195 }
196
197 static int lov_update_enqueue_lov(struct obd_export *exp,
198 struct lustre_handle *lov_lockhp,
199 struct lov_oinfo *loi, __u64 flags, int idx,
200 struct ost_id *oi, int rc)
201 {
202 struct lov_obd *lov = &exp->exp_obd->u.lov;
203
204 if (rc != ELDLM_OK &&
205 !(rc == ELDLM_LOCK_ABORTED && (flags & LDLM_FL_HAS_INTENT))) {
206 memset(lov_lockhp, 0, sizeof(*lov_lockhp));
207 if (lov->lov_tgts[idx] && lov->lov_tgts[idx]->ltd_active) {
208 /* -EUSERS used by OST to report file contention */
209 if (rc != -EINTR && rc != -EUSERS)
210 CERROR("%s: enqueue objid "DOSTID" subobj"
211 DOSTID" on OST idx %d: rc %d\n",
212 exp->exp_obd->obd_name,
213 POSTID(oi), POSTID(&loi->loi_oi),
214 loi->loi_ost_idx, rc);
215 } else
216 rc = ELDLM_OK;
217 }
218 return rc;
219 }
220
221 int lov_update_enqueue_set(struct lov_request *req, __u32 mode, int rc)
222 {
223 struct lov_request_set *set = req->rq_rqset;
224 struct lustre_handle *lov_lockhp;
225 struct obd_info *oi = set->set_oi;
226 struct lov_oinfo *loi;
227
228 LASSERT(oi != NULL);
229
230 lov_lockhp = set->set_lockh->llh_handles + req->rq_stripe;
231 loi = oi->oi_md->lsm_oinfo[req->rq_stripe];
232
233 /* XXX LOV STACKING: OSC gets a copy, created in lov_prep_enqueue_set
234 * and that copy can be arbitrarily out of date.
235 *
236 * The LOV API is due for a serious rewriting anyways, and this
237 * can be addressed then. */
238
239 lov_stripe_lock(oi->oi_md);
240 osc_update_enqueue(lov_lockhp, loi, oi->oi_flags,
241 &req->rq_oi.oi_md->lsm_oinfo[0]->loi_lvb, mode, rc);
242 if (rc == ELDLM_LOCK_ABORTED && (oi->oi_flags & LDLM_FL_HAS_INTENT))
243 memset(lov_lockhp, 0, sizeof(*lov_lockhp));
244 rc = lov_update_enqueue_lov(set->set_exp, lov_lockhp, loi, oi->oi_flags,
245 req->rq_idx, &oi->oi_md->lsm_oi, rc);
246 lov_stripe_unlock(oi->oi_md);
247 lov_update_set(set, req, rc);
248 return rc;
249 }
250
251 /* The callback for osc_enqueue that updates lov info for every OSC request. */
252 static int cb_update_enqueue(void *cookie, int rc)
253 {
254 struct obd_info *oinfo = cookie;
255 struct ldlm_enqueue_info *einfo;
256 struct lov_request *lovreq;
257
258 lovreq = container_of(oinfo, struct lov_request, rq_oi);
259 einfo = lovreq->rq_rqset->set_ei;
260 return lov_update_enqueue_set(lovreq, einfo->ei_mode, rc);
261 }
262
263 static int enqueue_done(struct lov_request_set *set, __u32 mode)
264 {
265 struct lov_request *req;
266 struct lov_obd *lov = &set->set_exp->exp_obd->u.lov;
267 int completes = atomic_read(&set->set_completes);
268 int rc = 0;
269
270 /* enqueue/match success, just return */
271 if (completes && completes == atomic_read(&set->set_success))
272 return 0;
273
274 /* cancel enqueued/matched locks */
275 list_for_each_entry(req, &set->set_list, rq_link) {
276 struct lustre_handle *lov_lockhp;
277
278 if (!req->rq_complete || req->rq_rc)
279 continue;
280
281 lov_lockhp = set->set_lockh->llh_handles + req->rq_stripe;
282 LASSERT(lov_lockhp);
283 if (!lustre_handle_is_used(lov_lockhp))
284 continue;
285
286 rc = obd_cancel(lov->lov_tgts[req->rq_idx]->ltd_exp,
287 req->rq_oi.oi_md, mode, lov_lockhp);
288 if (rc && lov->lov_tgts[req->rq_idx] &&
289 lov->lov_tgts[req->rq_idx]->ltd_active)
290 CERROR("%s: cancelling obdjid "DOSTID" on OST"
291 "idx %d error: rc = %d\n",
292 set->set_exp->exp_obd->obd_name,
293 POSTID(&req->rq_oi.oi_md->lsm_oi),
294 req->rq_idx, rc);
295 }
296 if (set->set_lockh)
297 lov_llh_put(set->set_lockh);
298 return rc;
299 }
300
301 int lov_fini_enqueue_set(struct lov_request_set *set, __u32 mode, int rc,
302 struct ptlrpc_request_set *rqset)
303 {
304 int ret = 0;
305
306 if (set == NULL)
307 return 0;
308 LASSERT(set->set_exp);
309 /* Do enqueue_done only for sync requests and if any request
310 * succeeded. */
311 if (!rqset) {
312 if (rc)
313 atomic_set(&set->set_completes, 0);
314 ret = enqueue_done(set, mode);
315 } else if (set->set_lockh)
316 lov_llh_put(set->set_lockh);
317
318 lov_put_reqset(set);
319
320 return rc ? rc : ret;
321 }
322
323 static void lov_llh_addref(void *llhp)
324 {
325 struct lov_lock_handles *llh = llhp;
326
327 atomic_inc(&llh->llh_refcount);
328 CDEBUG(D_INFO, "GETting llh %p : new refcount %d\n", llh,
329 atomic_read(&llh->llh_refcount));
330 }
331
332 static struct portals_handle_ops lov_handle_ops = {
333 .hop_addref = lov_llh_addref,
334 .hop_free = NULL,
335 };
336
337 static struct lov_lock_handles *lov_llh_new(struct lov_stripe_md *lsm)
338 {
339 struct lov_lock_handles *llh;
340
341 OBD_ALLOC(llh, sizeof(*llh) +
342 sizeof(*llh->llh_handles) * lsm->lsm_stripe_count);
343 if (llh == NULL)
344 return NULL;
345
346 atomic_set(&llh->llh_refcount, 2);
347 llh->llh_stripe_count = lsm->lsm_stripe_count;
348 INIT_LIST_HEAD(&llh->llh_handle.h_link);
349 class_handle_hash(&llh->llh_handle, &lov_handle_ops);
350
351 return llh;
352 }
353
354 int lov_prep_enqueue_set(struct obd_export *exp, struct obd_info *oinfo,
355 struct ldlm_enqueue_info *einfo,
356 struct lov_request_set **reqset)
357 {
358 struct lov_obd *lov = &exp->exp_obd->u.lov;
359 struct lov_request_set *set;
360 int i, rc = 0;
361
362 OBD_ALLOC(set, sizeof(*set));
363 if (set == NULL)
364 return -ENOMEM;
365 lov_init_set(set);
366
367 set->set_exp = exp;
368 set->set_oi = oinfo;
369 set->set_ei = einfo;
370 set->set_lockh = lov_llh_new(oinfo->oi_md);
371 if (set->set_lockh == NULL)
372 GOTO(out_set, rc = -ENOMEM);
373 oinfo->oi_lockh->cookie = set->set_lockh->llh_handle.h_cookie;
374
375 for (i = 0; i < oinfo->oi_md->lsm_stripe_count; i++) {
376 struct lov_oinfo *loi;
377 struct lov_request *req;
378 u64 start, end;
379
380 loi = oinfo->oi_md->lsm_oinfo[i];
381 if (!lov_stripe_intersects(oinfo->oi_md, i,
382 oinfo->oi_policy.l_extent.start,
383 oinfo->oi_policy.l_extent.end,
384 &start, &end))
385 continue;
386
387 if (!lov_check_and_wait_active(lov, loi->loi_ost_idx)) {
388 CDEBUG(D_HA, "lov idx %d inactive\n", loi->loi_ost_idx);
389 continue;
390 }
391
392 OBD_ALLOC(req, sizeof(*req));
393 if (req == NULL)
394 GOTO(out_set, rc = -ENOMEM);
395
396 req->rq_buflen = sizeof(*req->rq_oi.oi_md) +
397 sizeof(struct lov_oinfo *) +
398 sizeof(struct lov_oinfo);
399 OBD_ALLOC_LARGE(req->rq_oi.oi_md, req->rq_buflen);
400 if (req->rq_oi.oi_md == NULL) {
401 OBD_FREE(req, sizeof(*req));
402 GOTO(out_set, rc = -ENOMEM);
403 }
404 req->rq_oi.oi_md->lsm_oinfo[0] =
405 ((void *)req->rq_oi.oi_md) + sizeof(*req->rq_oi.oi_md) +
406 sizeof(struct lov_oinfo *);
407
408 /* Set lov request specific parameters. */
409 req->rq_oi.oi_lockh = set->set_lockh->llh_handles + i;
410 req->rq_oi.oi_cb_up = cb_update_enqueue;
411 req->rq_oi.oi_flags = oinfo->oi_flags;
412
413 LASSERT(req->rq_oi.oi_lockh);
414
415 req->rq_oi.oi_policy.l_extent.gid =
416 oinfo->oi_policy.l_extent.gid;
417 req->rq_oi.oi_policy.l_extent.start = start;
418 req->rq_oi.oi_policy.l_extent.end = end;
419
420 req->rq_idx = loi->loi_ost_idx;
421 req->rq_stripe = i;
422
423 /* XXX LOV STACKING: submd should be from the subobj */
424 req->rq_oi.oi_md->lsm_oi = loi->loi_oi;
425 req->rq_oi.oi_md->lsm_stripe_count = 0;
426 req->rq_oi.oi_md->lsm_oinfo[0]->loi_kms_valid =
427 loi->loi_kms_valid;
428 req->rq_oi.oi_md->lsm_oinfo[0]->loi_kms = loi->loi_kms;
429 req->rq_oi.oi_md->lsm_oinfo[0]->loi_lvb = loi->loi_lvb;
430
431 lov_set_add_req(req, set);
432 }
433 if (!set->set_count)
434 GOTO(out_set, rc = -EIO);
435 *reqset = set;
436 return 0;
437 out_set:
438 lov_fini_enqueue_set(set, einfo->ei_mode, rc, NULL);
439 return rc;
440 }
441
442 int lov_fini_match_set(struct lov_request_set *set, __u32 mode, __u64 flags)
443 {
444 int rc = 0;
445
446 if (set == NULL)
447 return 0;
448 LASSERT(set->set_exp);
449 rc = enqueue_done(set, mode);
450 if ((set->set_count == atomic_read(&set->set_success)) &&
451 (flags & LDLM_FL_TEST_LOCK))
452 lov_llh_put(set->set_lockh);
453
454 lov_put_reqset(set);
455
456 return rc;
457 }
458
459 int lov_prep_match_set(struct obd_export *exp, struct obd_info *oinfo,
460 struct lov_stripe_md *lsm, ldlm_policy_data_t *policy,
461 __u32 mode, struct lustre_handle *lockh,
462 struct lov_request_set **reqset)
463 {
464 struct lov_obd *lov = &exp->exp_obd->u.lov;
465 struct lov_request_set *set;
466 int i, rc = 0;
467
468 OBD_ALLOC(set, sizeof(*set));
469 if (set == NULL)
470 return -ENOMEM;
471 lov_init_set(set);
472
473 set->set_exp = exp;
474 set->set_oi = oinfo;
475 set->set_oi->oi_md = lsm;
476 set->set_lockh = lov_llh_new(lsm);
477 if (set->set_lockh == NULL)
478 GOTO(out_set, rc = -ENOMEM);
479 lockh->cookie = set->set_lockh->llh_handle.h_cookie;
480
481 for (i = 0; i < lsm->lsm_stripe_count; i++) {
482 struct lov_oinfo *loi;
483 struct lov_request *req;
484 u64 start, end;
485
486 loi = lsm->lsm_oinfo[i];
487 if (!lov_stripe_intersects(lsm, i, policy->l_extent.start,
488 policy->l_extent.end, &start, &end))
489 continue;
490
491 /* FIXME raid1 should grace this error */
492 if (!lov_check_and_wait_active(lov, loi->loi_ost_idx)) {
493 CDEBUG(D_HA, "lov idx %d inactive\n", loi->loi_ost_idx);
494 GOTO(out_set, rc = -EIO);
495 }
496
497 OBD_ALLOC(req, sizeof(*req));
498 if (req == NULL)
499 GOTO(out_set, rc = -ENOMEM);
500
501 req->rq_buflen = sizeof(*req->rq_oi.oi_md);
502 OBD_ALLOC_LARGE(req->rq_oi.oi_md, req->rq_buflen);
503 if (req->rq_oi.oi_md == NULL) {
504 OBD_FREE(req, sizeof(*req));
505 GOTO(out_set, rc = -ENOMEM);
506 }
507
508 req->rq_oi.oi_policy.l_extent.start = start;
509 req->rq_oi.oi_policy.l_extent.end = end;
510 req->rq_oi.oi_policy.l_extent.gid = policy->l_extent.gid;
511
512 req->rq_idx = loi->loi_ost_idx;
513 req->rq_stripe = i;
514
515 /* XXX LOV STACKING: submd should be from the subobj */
516 req->rq_oi.oi_md->lsm_oi = loi->loi_oi;
517 req->rq_oi.oi_md->lsm_stripe_count = 0;
518
519 lov_set_add_req(req, set);
520 }
521 if (!set->set_count)
522 GOTO(out_set, rc = -EIO);
523 *reqset = set;
524 return rc;
525 out_set:
526 lov_fini_match_set(set, mode, 0);
527 return rc;
528 }
529
530 int lov_fini_cancel_set(struct lov_request_set *set)
531 {
532 int rc = 0;
533
534 if (set == NULL)
535 return 0;
536
537 LASSERT(set->set_exp);
538 if (set->set_lockh)
539 lov_llh_put(set->set_lockh);
540
541 lov_put_reqset(set);
542
543 return rc;
544 }
545
546 int lov_prep_cancel_set(struct obd_export *exp, struct obd_info *oinfo,
547 struct lov_stripe_md *lsm, __u32 mode,
548 struct lustre_handle *lockh,
549 struct lov_request_set **reqset)
550 {
551 struct lov_request_set *set;
552 int i, rc = 0;
553
554 OBD_ALLOC(set, sizeof(*set));
555 if (set == NULL)
556 return -ENOMEM;
557 lov_init_set(set);
558
559 set->set_exp = exp;
560 set->set_oi = oinfo;
561 set->set_oi->oi_md = lsm;
562 set->set_lockh = lov_handle2llh(lockh);
563 if (set->set_lockh == NULL) {
564 CERROR("LOV: invalid lov lock handle %p\n", lockh);
565 GOTO(out_set, rc = -EINVAL);
566 }
567 lockh->cookie = set->set_lockh->llh_handle.h_cookie;
568
569 for (i = 0; i < lsm->lsm_stripe_count; i++) {
570 struct lov_request *req;
571 struct lustre_handle *lov_lockhp;
572 struct lov_oinfo *loi = lsm->lsm_oinfo[i];
573
574 lov_lockhp = set->set_lockh->llh_handles + i;
575 if (!lustre_handle_is_used(lov_lockhp)) {
576 CDEBUG(D_INFO, "lov idx %d subobj "DOSTID" no lock\n",
577 loi->loi_ost_idx, POSTID(&loi->loi_oi));
578 continue;
579 }
580
581 OBD_ALLOC(req, sizeof(*req));
582 if (req == NULL)
583 GOTO(out_set, rc = -ENOMEM);
584
585 req->rq_buflen = sizeof(*req->rq_oi.oi_md);
586 OBD_ALLOC_LARGE(req->rq_oi.oi_md, req->rq_buflen);
587 if (req->rq_oi.oi_md == NULL) {
588 OBD_FREE(req, sizeof(*req));
589 GOTO(out_set, rc = -ENOMEM);
590 }
591
592 req->rq_idx = loi->loi_ost_idx;
593 req->rq_stripe = i;
594
595 /* XXX LOV STACKING: submd should be from the subobj */
596 req->rq_oi.oi_md->lsm_oi = loi->loi_oi;
597 req->rq_oi.oi_md->lsm_stripe_count = 0;
598
599 lov_set_add_req(req, set);
600 }
601 if (!set->set_count)
602 GOTO(out_set, rc = -EIO);
603 *reqset = set;
604 return rc;
605 out_set:
606 lov_fini_cancel_set(set);
607 return rc;
608 }
609 static int common_attr_done(struct lov_request_set *set)
610 {
611 struct list_head *pos;
612 struct lov_request *req;
613 struct obdo *tmp_oa;
614 int rc = 0, attrset = 0;
615
616 LASSERT(set->set_oi != NULL);
617
618 if (set->set_oi->oi_oa == NULL)
619 return 0;
620
621 if (!atomic_read(&set->set_success))
622 return -EIO;
623
624 OBDO_ALLOC(tmp_oa);
625 if (tmp_oa == NULL)
626 GOTO(out, rc = -ENOMEM);
627
628 list_for_each(pos, &set->set_list) {
629 req = list_entry(pos, struct lov_request, rq_link);
630
631 if (!req->rq_complete || req->rq_rc)
632 continue;
633 if (req->rq_oi.oi_oa->o_valid == 0) /* inactive stripe */
634 continue;
635 lov_merge_attrs(tmp_oa, req->rq_oi.oi_oa,
636 req->rq_oi.oi_oa->o_valid,
637 set->set_oi->oi_md, req->rq_stripe, &attrset);
638 }
639 if (!attrset) {
640 CERROR("No stripes had valid attrs\n");
641 rc = -EIO;
642 }
643 if ((set->set_oi->oi_oa->o_valid & OBD_MD_FLEPOCH) &&
644 (set->set_oi->oi_md->lsm_stripe_count != attrset)) {
645 /* When we take attributes of some epoch, we require all the
646 * ost to be active. */
647 CERROR("Not all the stripes had valid attrs\n");
648 GOTO(out, rc = -EIO);
649 }
650
651 tmp_oa->o_oi = set->set_oi->oi_oa->o_oi;
652 memcpy(set->set_oi->oi_oa, tmp_oa, sizeof(*set->set_oi->oi_oa));
653 out:
654 if (tmp_oa)
655 OBDO_FREE(tmp_oa);
656 return rc;
657
658 }
659
660 static int brw_done(struct lov_request_set *set)
661 {
662 struct lov_stripe_md *lsm = set->set_oi->oi_md;
663 struct lov_oinfo *loi = NULL;
664 struct list_head *pos;
665 struct lov_request *req;
666
667 list_for_each(pos, &set->set_list) {
668 req = list_entry(pos, struct lov_request, rq_link);
669
670 if (!req->rq_complete || req->rq_rc)
671 continue;
672
673 loi = lsm->lsm_oinfo[req->rq_stripe];
674
675 if (req->rq_oi.oi_oa->o_valid & OBD_MD_FLBLOCKS)
676 loi->loi_lvb.lvb_blocks = req->rq_oi.oi_oa->o_blocks;
677 }
678
679 return 0;
680 }
681
682 int lov_fini_brw_set(struct lov_request_set *set)
683 {
684 int rc = 0;
685
686 if (set == NULL)
687 return 0;
688 LASSERT(set->set_exp);
689 if (atomic_read(&set->set_completes)) {
690 rc = brw_done(set);
691 /* FIXME update qos data here */
692 }
693 lov_put_reqset(set);
694
695 return rc;
696 }
697
698 int lov_prep_brw_set(struct obd_export *exp, struct obd_info *oinfo,
699 u32 oa_bufs, struct brw_page *pga,
700 struct obd_trans_info *oti,
701 struct lov_request_set **reqset)
702 {
703 struct {
704 u32 index;
705 u32 count;
706 u32 off;
707 } *info = NULL;
708 struct lov_request_set *set;
709 struct lov_obd *lov = &exp->exp_obd->u.lov;
710 int rc = 0, i, shift;
711
712 OBD_ALLOC(set, sizeof(*set));
713 if (set == NULL)
714 return -ENOMEM;
715 lov_init_set(set);
716
717 set->set_exp = exp;
718 set->set_oti = oti;
719 set->set_oi = oinfo;
720 set->set_oabufs = oa_bufs;
721 OBD_ALLOC_LARGE(set->set_pga, oa_bufs * sizeof(*set->set_pga));
722 if (!set->set_pga)
723 GOTO(out, rc = -ENOMEM);
724
725 OBD_ALLOC_LARGE(info, sizeof(*info) * oinfo->oi_md->lsm_stripe_count);
726 if (!info)
727 GOTO(out, rc = -ENOMEM);
728
729 /* calculate the page count for each stripe */
730 for (i = 0; i < oa_bufs; i++) {
731 int stripe = lov_stripe_number(oinfo->oi_md, pga[i].off);
732 info[stripe].count++;
733 }
734
735 /* alloc and initialize lov request */
736 shift = 0;
737 for (i = 0; i < oinfo->oi_md->lsm_stripe_count; i++) {
738 struct lov_oinfo *loi = NULL;
739 struct lov_request *req;
740
741 if (info[i].count == 0)
742 continue;
743
744 loi = oinfo->oi_md->lsm_oinfo[i];
745 if (!lov_check_and_wait_active(lov, loi->loi_ost_idx)) {
746 CDEBUG(D_HA, "lov idx %d inactive\n", loi->loi_ost_idx);
747 GOTO(out, rc = -EIO);
748 }
749
750 OBD_ALLOC(req, sizeof(*req));
751 if (req == NULL)
752 GOTO(out, rc = -ENOMEM);
753
754 OBDO_ALLOC(req->rq_oi.oi_oa);
755 if (req->rq_oi.oi_oa == NULL) {
756 OBD_FREE(req, sizeof(*req));
757 GOTO(out, rc = -ENOMEM);
758 }
759
760 if (oinfo->oi_oa) {
761 memcpy(req->rq_oi.oi_oa, oinfo->oi_oa,
762 sizeof(*req->rq_oi.oi_oa));
763 }
764 req->rq_oi.oi_oa->o_oi = loi->loi_oi;
765 req->rq_oi.oi_oa->o_stripe_idx = i;
766
767 req->rq_buflen = sizeof(*req->rq_oi.oi_md);
768 OBD_ALLOC_LARGE(req->rq_oi.oi_md, req->rq_buflen);
769 if (req->rq_oi.oi_md == NULL) {
770 OBDO_FREE(req->rq_oi.oi_oa);
771 OBD_FREE(req, sizeof(*req));
772 GOTO(out, rc = -ENOMEM);
773 }
774
775 req->rq_idx = loi->loi_ost_idx;
776 req->rq_stripe = i;
777
778 /* XXX LOV STACKING */
779 req->rq_oi.oi_md->lsm_oi = loi->loi_oi;
780 req->rq_oabufs = info[i].count;
781 req->rq_pgaidx = shift;
782 shift += req->rq_oabufs;
783
784 /* remember the index for sort brw_page array */
785 info[i].index = req->rq_pgaidx;
786
787 req->rq_oi.oi_capa = oinfo->oi_capa;
788
789 lov_set_add_req(req, set);
790 }
791 if (!set->set_count)
792 GOTO(out, rc = -EIO);
793
794 /* rotate & sort the brw_page array */
795 for (i = 0; i < oa_bufs; i++) {
796 int stripe = lov_stripe_number(oinfo->oi_md, pga[i].off);
797
798 shift = info[stripe].index + info[stripe].off;
799 LASSERT(shift < oa_bufs);
800 set->set_pga[shift] = pga[i];
801 lov_stripe_offset(oinfo->oi_md, pga[i].off, stripe,
802 &set->set_pga[shift].off);
803 info[stripe].off++;
804 }
805 out:
806 if (info)
807 OBD_FREE_LARGE(info,
808 sizeof(*info) * oinfo->oi_md->lsm_stripe_count);
809
810 if (rc == 0)
811 *reqset = set;
812 else
813 lov_fini_brw_set(set);
814
815 return rc;
816 }
817
818 int lov_fini_getattr_set(struct lov_request_set *set)
819 {
820 int rc = 0;
821
822 if (set == NULL)
823 return 0;
824 LASSERT(set->set_exp);
825 if (atomic_read(&set->set_completes))
826 rc = common_attr_done(set);
827
828 lov_put_reqset(set);
829
830 return rc;
831 }
832
833 /* The callback for osc_getattr_async that finalizes a request info when a
834 * response is received. */
835 static int cb_getattr_update(void *cookie, int rc)
836 {
837 struct obd_info *oinfo = cookie;
838 struct lov_request *lovreq;
839
840 lovreq = container_of(oinfo, struct lov_request, rq_oi);
841 return lov_update_common_set(lovreq->rq_rqset, lovreq, rc);
842 }
843
844 int lov_prep_getattr_set(struct obd_export *exp, struct obd_info *oinfo,
845 struct lov_request_set **reqset)
846 {
847 struct lov_request_set *set;
848 struct lov_obd *lov = &exp->exp_obd->u.lov;
849 int rc = 0, i;
850
851 OBD_ALLOC(set, sizeof(*set));
852 if (set == NULL)
853 return -ENOMEM;
854 lov_init_set(set);
855
856 set->set_exp = exp;
857 set->set_oi = oinfo;
858
859 for (i = 0; i < oinfo->oi_md->lsm_stripe_count; i++) {
860 struct lov_oinfo *loi;
861 struct lov_request *req;
862
863 loi = oinfo->oi_md->lsm_oinfo[i];
864 if (!lov_check_and_wait_active(lov, loi->loi_ost_idx)) {
865 CDEBUG(D_HA, "lov idx %d inactive\n", loi->loi_ost_idx);
866 if (oinfo->oi_oa->o_valid & OBD_MD_FLEPOCH)
867 /* SOM requires all the OSTs to be active. */
868 GOTO(out_set, rc = -EIO);
869 continue;
870 }
871
872 OBD_ALLOC(req, sizeof(*req));
873 if (req == NULL)
874 GOTO(out_set, rc = -ENOMEM);
875
876 req->rq_stripe = i;
877 req->rq_idx = loi->loi_ost_idx;
878
879 OBDO_ALLOC(req->rq_oi.oi_oa);
880 if (req->rq_oi.oi_oa == NULL) {
881 OBD_FREE(req, sizeof(*req));
882 GOTO(out_set, rc = -ENOMEM);
883 }
884 memcpy(req->rq_oi.oi_oa, oinfo->oi_oa,
885 sizeof(*req->rq_oi.oi_oa));
886 req->rq_oi.oi_oa->o_oi = loi->loi_oi;
887 req->rq_oi.oi_cb_up = cb_getattr_update;
888 req->rq_oi.oi_capa = oinfo->oi_capa;
889
890 lov_set_add_req(req, set);
891 }
892 if (!set->set_count)
893 GOTO(out_set, rc = -EIO);
894 *reqset = set;
895 return rc;
896 out_set:
897 lov_fini_getattr_set(set);
898 return rc;
899 }
900
901 int lov_fini_destroy_set(struct lov_request_set *set)
902 {
903 if (set == NULL)
904 return 0;
905 LASSERT(set->set_exp);
906 if (atomic_read(&set->set_completes)) {
907 /* FIXME update qos data here */
908 }
909
910 lov_put_reqset(set);
911
912 return 0;
913 }
914
915 int lov_prep_destroy_set(struct obd_export *exp, struct obd_info *oinfo,
916 struct obdo *src_oa, struct lov_stripe_md *lsm,
917 struct obd_trans_info *oti,
918 struct lov_request_set **reqset)
919 {
920 struct lov_request_set *set;
921 struct lov_obd *lov = &exp->exp_obd->u.lov;
922 int rc = 0, i;
923
924 OBD_ALLOC(set, sizeof(*set));
925 if (set == NULL)
926 return -ENOMEM;
927 lov_init_set(set);
928
929 set->set_exp = exp;
930 set->set_oi = oinfo;
931 set->set_oi->oi_md = lsm;
932 set->set_oi->oi_oa = src_oa;
933 set->set_oti = oti;
934 if (oti != NULL && src_oa->o_valid & OBD_MD_FLCOOKIE)
935 set->set_cookies = oti->oti_logcookies;
936
937 for (i = 0; i < lsm->lsm_stripe_count; i++) {
938 struct lov_oinfo *loi;
939 struct lov_request *req;
940
941 loi = lsm->lsm_oinfo[i];
942 if (!lov_check_and_wait_active(lov, loi->loi_ost_idx)) {
943 CDEBUG(D_HA, "lov idx %d inactive\n", loi->loi_ost_idx);
944 continue;
945 }
946
947 OBD_ALLOC(req, sizeof(*req));
948 if (req == NULL)
949 GOTO(out_set, rc = -ENOMEM);
950
951 req->rq_stripe = i;
952 req->rq_idx = loi->loi_ost_idx;
953
954 OBDO_ALLOC(req->rq_oi.oi_oa);
955 if (req->rq_oi.oi_oa == NULL) {
956 OBD_FREE(req, sizeof(*req));
957 GOTO(out_set, rc = -ENOMEM);
958 }
959 memcpy(req->rq_oi.oi_oa, src_oa, sizeof(*req->rq_oi.oi_oa));
960 req->rq_oi.oi_oa->o_oi = loi->loi_oi;
961 lov_set_add_req(req, set);
962 }
963 if (!set->set_count)
964 GOTO(out_set, rc = -EIO);
965 *reqset = set;
966 return rc;
967 out_set:
968 lov_fini_destroy_set(set);
969 return rc;
970 }
971
972 int lov_fini_setattr_set(struct lov_request_set *set)
973 {
974 int rc = 0;
975
976 if (set == NULL)
977 return 0;
978 LASSERT(set->set_exp);
979 if (atomic_read(&set->set_completes)) {
980 rc = common_attr_done(set);
981 /* FIXME update qos data here */
982 }
983
984 lov_put_reqset(set);
985 return rc;
986 }
987
988 int lov_update_setattr_set(struct lov_request_set *set,
989 struct lov_request *req, int rc)
990 {
991 struct lov_obd *lov = &req->rq_rqset->set_exp->exp_obd->u.lov;
992 struct lov_stripe_md *lsm = req->rq_rqset->set_oi->oi_md;
993
994 lov_update_set(set, req, rc);
995
996 /* grace error on inactive ost */
997 if (rc && !(lov->lov_tgts[req->rq_idx] &&
998 lov->lov_tgts[req->rq_idx]->ltd_active))
999 rc = 0;
1000
1001 if (rc == 0) {
1002 if (req->rq_oi.oi_oa->o_valid & OBD_MD_FLCTIME)
1003 lsm->lsm_oinfo[req->rq_stripe]->loi_lvb.lvb_ctime =
1004 req->rq_oi.oi_oa->o_ctime;
1005 if (req->rq_oi.oi_oa->o_valid & OBD_MD_FLMTIME)
1006 lsm->lsm_oinfo[req->rq_stripe]->loi_lvb.lvb_mtime =
1007 req->rq_oi.oi_oa->o_mtime;
1008 if (req->rq_oi.oi_oa->o_valid & OBD_MD_FLATIME)
1009 lsm->lsm_oinfo[req->rq_stripe]->loi_lvb.lvb_atime =
1010 req->rq_oi.oi_oa->o_atime;
1011 }
1012
1013 return rc;
1014 }
1015
1016 /* The callback for osc_setattr_async that finalizes a request info when a
1017 * response is received. */
1018 static int cb_setattr_update(void *cookie, int rc)
1019 {
1020 struct obd_info *oinfo = cookie;
1021 struct lov_request *lovreq;
1022
1023 lovreq = container_of(oinfo, struct lov_request, rq_oi);
1024 return lov_update_setattr_set(lovreq->rq_rqset, lovreq, rc);
1025 }
1026
1027 int lov_prep_setattr_set(struct obd_export *exp, struct obd_info *oinfo,
1028 struct obd_trans_info *oti,
1029 struct lov_request_set **reqset)
1030 {
1031 struct lov_request_set *set;
1032 struct lov_obd *lov = &exp->exp_obd->u.lov;
1033 int rc = 0, i;
1034
1035 OBD_ALLOC(set, sizeof(*set));
1036 if (set == NULL)
1037 return -ENOMEM;
1038 lov_init_set(set);
1039
1040 set->set_exp = exp;
1041 set->set_oti = oti;
1042 set->set_oi = oinfo;
1043 if (oti != NULL && oinfo->oi_oa->o_valid & OBD_MD_FLCOOKIE)
1044 set->set_cookies = oti->oti_logcookies;
1045
1046 for (i = 0; i < oinfo->oi_md->lsm_stripe_count; i++) {
1047 struct lov_oinfo *loi = oinfo->oi_md->lsm_oinfo[i];
1048 struct lov_request *req;
1049
1050 if (!lov_check_and_wait_active(lov, loi->loi_ost_idx)) {
1051 CDEBUG(D_HA, "lov idx %d inactive\n", loi->loi_ost_idx);
1052 continue;
1053 }
1054
1055 OBD_ALLOC(req, sizeof(*req));
1056 if (req == NULL)
1057 GOTO(out_set, rc = -ENOMEM);
1058 req->rq_stripe = i;
1059 req->rq_idx = loi->loi_ost_idx;
1060
1061 OBDO_ALLOC(req->rq_oi.oi_oa);
1062 if (req->rq_oi.oi_oa == NULL) {
1063 OBD_FREE(req, sizeof(*req));
1064 GOTO(out_set, rc = -ENOMEM);
1065 }
1066 memcpy(req->rq_oi.oi_oa, oinfo->oi_oa,
1067 sizeof(*req->rq_oi.oi_oa));
1068 req->rq_oi.oi_oa->o_oi = loi->loi_oi;
1069 req->rq_oi.oi_oa->o_stripe_idx = i;
1070 req->rq_oi.oi_cb_up = cb_setattr_update;
1071 req->rq_oi.oi_capa = oinfo->oi_capa;
1072
1073 if (oinfo->oi_oa->o_valid & OBD_MD_FLSIZE) {
1074 int off = lov_stripe_offset(oinfo->oi_md,
1075 oinfo->oi_oa->o_size, i,
1076 &req->rq_oi.oi_oa->o_size);
1077
1078 if (off < 0 && req->rq_oi.oi_oa->o_size)
1079 req->rq_oi.oi_oa->o_size--;
1080
1081 CDEBUG(D_INODE, "stripe %d has size %llu/%llu\n",
1082 i, req->rq_oi.oi_oa->o_size,
1083 oinfo->oi_oa->o_size);
1084 }
1085 lov_set_add_req(req, set);
1086 }
1087 if (!set->set_count)
1088 GOTO(out_set, rc = -EIO);
1089 *reqset = set;
1090 return rc;
1091 out_set:
1092 lov_fini_setattr_set(set);
1093 return rc;
1094 }
1095
1096 int lov_fini_punch_set(struct lov_request_set *set)
1097 {
1098 int rc = 0;
1099
1100 if (set == NULL)
1101 return 0;
1102 LASSERT(set->set_exp);
1103 if (atomic_read(&set->set_completes)) {
1104 rc = -EIO;
1105 /* FIXME update qos data here */
1106 if (atomic_read(&set->set_success))
1107 rc = common_attr_done(set);
1108 }
1109
1110 lov_put_reqset(set);
1111
1112 return rc;
1113 }
1114
1115 int lov_update_punch_set(struct lov_request_set *set,
1116 struct lov_request *req, int rc)
1117 {
1118 struct lov_obd *lov = &req->rq_rqset->set_exp->exp_obd->u.lov;
1119 struct lov_stripe_md *lsm = req->rq_rqset->set_oi->oi_md;
1120
1121 lov_update_set(set, req, rc);
1122
1123 /* grace error on inactive ost */
1124 if (rc && !lov->lov_tgts[req->rq_idx]->ltd_active)
1125 rc = 0;
1126
1127 if (rc == 0) {
1128 lov_stripe_lock(lsm);
1129 if (req->rq_oi.oi_oa->o_valid & OBD_MD_FLBLOCKS) {
1130 lsm->lsm_oinfo[req->rq_stripe]->loi_lvb.lvb_blocks =
1131 req->rq_oi.oi_oa->o_blocks;
1132 }
1133
1134 lov_stripe_unlock(lsm);
1135 }
1136
1137 return rc;
1138 }
1139
1140 /* The callback for osc_punch that finalizes a request info when a response
1141 * is received. */
1142 static int cb_update_punch(void *cookie, int rc)
1143 {
1144 struct obd_info *oinfo = cookie;
1145 struct lov_request *lovreq;
1146
1147 lovreq = container_of(oinfo, struct lov_request, rq_oi);
1148 return lov_update_punch_set(lovreq->rq_rqset, lovreq, rc);
1149 }
1150
1151 int lov_prep_punch_set(struct obd_export *exp, struct obd_info *oinfo,
1152 struct obd_trans_info *oti,
1153 struct lov_request_set **reqset)
1154 {
1155 struct lov_request_set *set;
1156 struct lov_obd *lov = &exp->exp_obd->u.lov;
1157 int rc = 0, i;
1158
1159 OBD_ALLOC(set, sizeof(*set));
1160 if (set == NULL)
1161 return -ENOMEM;
1162 lov_init_set(set);
1163
1164 set->set_oi = oinfo;
1165 set->set_exp = exp;
1166
1167 for (i = 0; i < oinfo->oi_md->lsm_stripe_count; i++) {
1168 struct lov_oinfo *loi = oinfo->oi_md->lsm_oinfo[i];
1169 struct lov_request *req;
1170 u64 rs, re;
1171
1172 if (!lov_stripe_intersects(oinfo->oi_md, i,
1173 oinfo->oi_policy.l_extent.start,
1174 oinfo->oi_policy.l_extent.end,
1175 &rs, &re))
1176 continue;
1177
1178 if (!lov_check_and_wait_active(lov, loi->loi_ost_idx)) {
1179 CDEBUG(D_HA, "lov idx %d inactive\n", loi->loi_ost_idx);
1180 GOTO(out_set, rc = -EIO);
1181 }
1182
1183 OBD_ALLOC(req, sizeof(*req));
1184 if (req == NULL)
1185 GOTO(out_set, rc = -ENOMEM);
1186 req->rq_stripe = i;
1187 req->rq_idx = loi->loi_ost_idx;
1188
1189 OBDO_ALLOC(req->rq_oi.oi_oa);
1190 if (req->rq_oi.oi_oa == NULL) {
1191 OBD_FREE(req, sizeof(*req));
1192 GOTO(out_set, rc = -ENOMEM);
1193 }
1194 memcpy(req->rq_oi.oi_oa, oinfo->oi_oa,
1195 sizeof(*req->rq_oi.oi_oa));
1196 req->rq_oi.oi_oa->o_oi = loi->loi_oi;
1197 req->rq_oi.oi_oa->o_valid |= OBD_MD_FLGROUP;
1198
1199 req->rq_oi.oi_oa->o_stripe_idx = i;
1200 req->rq_oi.oi_cb_up = cb_update_punch;
1201
1202 req->rq_oi.oi_policy.l_extent.start = rs;
1203 req->rq_oi.oi_policy.l_extent.end = re;
1204 req->rq_oi.oi_policy.l_extent.gid = -1;
1205
1206 req->rq_oi.oi_capa = oinfo->oi_capa;
1207
1208 lov_set_add_req(req, set);
1209 }
1210 if (!set->set_count)
1211 GOTO(out_set, rc = -EIO);
1212 *reqset = set;
1213 return rc;
1214 out_set:
1215 lov_fini_punch_set(set);
1216 return rc;
1217 }
1218
1219 int lov_fini_sync_set(struct lov_request_set *set)
1220 {
1221 int rc = 0;
1222
1223 if (set == NULL)
1224 return 0;
1225 LASSERT(set->set_exp);
1226 if (atomic_read(&set->set_completes)) {
1227 if (!atomic_read(&set->set_success))
1228 rc = -EIO;
1229 /* FIXME update qos data here */
1230 }
1231
1232 lov_put_reqset(set);
1233
1234 return rc;
1235 }
1236
1237 /* The callback for osc_sync that finalizes a request info when a
1238 * response is received. */
1239 static int cb_sync_update(void *cookie, int rc)
1240 {
1241 struct obd_info *oinfo = cookie;
1242 struct lov_request *lovreq;
1243
1244 lovreq = container_of(oinfo, struct lov_request, rq_oi);
1245 return lov_update_common_set(lovreq->rq_rqset, lovreq, rc);
1246 }
1247
1248 int lov_prep_sync_set(struct obd_export *exp, struct obd_info *oinfo,
1249 u64 start, u64 end,
1250 struct lov_request_set **reqset)
1251 {
1252 struct lov_request_set *set;
1253 struct lov_obd *lov = &exp->exp_obd->u.lov;
1254 int rc = 0, i;
1255
1256 OBD_ALLOC_PTR(set);
1257 if (set == NULL)
1258 return -ENOMEM;
1259 lov_init_set(set);
1260
1261 set->set_exp = exp;
1262 set->set_oi = oinfo;
1263
1264 for (i = 0; i < oinfo->oi_md->lsm_stripe_count; i++) {
1265 struct lov_oinfo *loi = oinfo->oi_md->lsm_oinfo[i];
1266 struct lov_request *req;
1267 u64 rs, re;
1268
1269 if (!lov_check_and_wait_active(lov, loi->loi_ost_idx)) {
1270 CDEBUG(D_HA, "lov idx %d inactive\n", loi->loi_ost_idx);
1271 continue;
1272 }
1273
1274 if (!lov_stripe_intersects(oinfo->oi_md, i, start, end, &rs,
1275 &re))
1276 continue;
1277
1278 OBD_ALLOC_PTR(req);
1279 if (req == NULL)
1280 GOTO(out_set, rc = -ENOMEM);
1281 req->rq_stripe = i;
1282 req->rq_idx = loi->loi_ost_idx;
1283
1284 OBDO_ALLOC(req->rq_oi.oi_oa);
1285 if (req->rq_oi.oi_oa == NULL) {
1286 OBD_FREE(req, sizeof(*req));
1287 GOTO(out_set, rc = -ENOMEM);
1288 }
1289 *req->rq_oi.oi_oa = *oinfo->oi_oa;
1290 req->rq_oi.oi_oa->o_oi = loi->loi_oi;
1291 req->rq_oi.oi_oa->o_stripe_idx = i;
1292
1293 req->rq_oi.oi_policy.l_extent.start = rs;
1294 req->rq_oi.oi_policy.l_extent.end = re;
1295 req->rq_oi.oi_policy.l_extent.gid = -1;
1296 req->rq_oi.oi_cb_up = cb_sync_update;
1297
1298 lov_set_add_req(req, set);
1299 }
1300 if (!set->set_count)
1301 GOTO(out_set, rc = -EIO);
1302 *reqset = set;
1303 return rc;
1304 out_set:
1305 lov_fini_sync_set(set);
1306 return rc;
1307 }
1308
1309 #define LOV_U64_MAX ((__u64)~0ULL)
1310 #define LOV_SUM_MAX(tot, add) \
1311 do { \
1312 if ((tot) + (add) < (tot)) \
1313 (tot) = LOV_U64_MAX; \
1314 else \
1315 (tot) += (add); \
1316 } while (0)
1317
1318 int lov_fini_statfs(struct obd_device *obd, struct obd_statfs *osfs,int success)
1319 {
1320 if (success) {
1321 __u32 expected_stripes = lov_get_stripecnt(&obd->u.lov,
1322 LOV_MAGIC, 0);
1323 if (osfs->os_files != LOV_U64_MAX)
1324 lov_do_div64(osfs->os_files, expected_stripes);
1325 if (osfs->os_ffree != LOV_U64_MAX)
1326 lov_do_div64(osfs->os_ffree, expected_stripes);
1327
1328 spin_lock(&obd->obd_osfs_lock);
1329 memcpy(&obd->obd_osfs, osfs, sizeof(*osfs));
1330 obd->obd_osfs_age = cfs_time_current_64();
1331 spin_unlock(&obd->obd_osfs_lock);
1332 return 0;
1333 }
1334
1335 return -EIO;
1336 }
1337
1338 int lov_fini_statfs_set(struct lov_request_set *set)
1339 {
1340 int rc = 0;
1341
1342 if (set == NULL)
1343 return 0;
1344
1345 if (atomic_read(&set->set_completes)) {
1346 rc = lov_fini_statfs(set->set_obd, set->set_oi->oi_osfs,
1347 atomic_read(&set->set_success));
1348 }
1349 lov_put_reqset(set);
1350 return rc;
1351 }
1352
1353 void lov_update_statfs(struct obd_statfs *osfs, struct obd_statfs *lov_sfs,
1354 int success)
1355 {
1356 int shift = 0, quit = 0;
1357 __u64 tmp;
1358
1359 if (success == 0) {
1360 memcpy(osfs, lov_sfs, sizeof(*lov_sfs));
1361 } else {
1362 if (osfs->os_bsize != lov_sfs->os_bsize) {
1363 /* assume all block sizes are always powers of 2 */
1364 /* get the bits difference */
1365 tmp = osfs->os_bsize | lov_sfs->os_bsize;
1366 for (shift = 0; shift <= 64; ++shift) {
1367 if (tmp & 1) {
1368 if (quit)
1369 break;
1370 else
1371 quit = 1;
1372 shift = 0;
1373 }
1374 tmp >>= 1;
1375 }
1376 }
1377
1378 if (osfs->os_bsize < lov_sfs->os_bsize) {
1379 osfs->os_bsize = lov_sfs->os_bsize;
1380
1381 osfs->os_bfree >>= shift;
1382 osfs->os_bavail >>= shift;
1383 osfs->os_blocks >>= shift;
1384 } else if (shift != 0) {
1385 lov_sfs->os_bfree >>= shift;
1386 lov_sfs->os_bavail >>= shift;
1387 lov_sfs->os_blocks >>= shift;
1388 }
1389 osfs->os_bfree += lov_sfs->os_bfree;
1390 osfs->os_bavail += lov_sfs->os_bavail;
1391 osfs->os_blocks += lov_sfs->os_blocks;
1392 /* XXX not sure about this one - depends on policy.
1393 * - could be minimum if we always stripe on all OBDs
1394 * (but that would be wrong for any other policy,
1395 * if one of the OBDs has no more objects left)
1396 * - could be sum if we stripe whole objects
1397 * - could be average, just to give a nice number
1398 *
1399 * To give a "reasonable" (if not wholly accurate)
1400 * number, we divide the total number of free objects
1401 * by expected stripe count (watch out for overflow).
1402 */
1403 LOV_SUM_MAX(osfs->os_files, lov_sfs->os_files);
1404 LOV_SUM_MAX(osfs->os_ffree, lov_sfs->os_ffree);
1405 }
1406 }
1407
1408 /* The callback for osc_statfs_async that finalizes a request info when a
1409 * response is received. */
1410 static int cb_statfs_update(void *cookie, int rc)
1411 {
1412 struct obd_info *oinfo = cookie;
1413 struct lov_request *lovreq;
1414 struct lov_request_set *set;
1415 struct obd_statfs *osfs, *lov_sfs;
1416 struct lov_obd *lov;
1417 struct lov_tgt_desc *tgt;
1418 struct obd_device *lovobd, *tgtobd;
1419 int success;
1420
1421 lovreq = container_of(oinfo, struct lov_request, rq_oi);
1422 set = lovreq->rq_rqset;
1423 lovobd = set->set_obd;
1424 lov = &lovobd->u.lov;
1425 osfs = set->set_oi->oi_osfs;
1426 lov_sfs = oinfo->oi_osfs;
1427 success = atomic_read(&set->set_success);
1428 /* XXX: the same is done in lov_update_common_set, however
1429 lovset->set_exp is not initialized. */
1430 lov_update_set(set, lovreq, rc);
1431 if (rc)
1432 GOTO(out, rc);
1433
1434 obd_getref(lovobd);
1435 tgt = lov->lov_tgts[lovreq->rq_idx];
1436 if (!tgt || !tgt->ltd_active)
1437 GOTO(out_update, rc);
1438
1439 tgtobd = class_exp2obd(tgt->ltd_exp);
1440 spin_lock(&tgtobd->obd_osfs_lock);
1441 memcpy(&tgtobd->obd_osfs, lov_sfs, sizeof(*lov_sfs));
1442 if ((oinfo->oi_flags & OBD_STATFS_FROM_CACHE) == 0)
1443 tgtobd->obd_osfs_age = cfs_time_current_64();
1444 spin_unlock(&tgtobd->obd_osfs_lock);
1445
1446 out_update:
1447 lov_update_statfs(osfs, lov_sfs, success);
1448 obd_putref(lovobd);
1449
1450 out:
1451 if (set->set_oi->oi_flags & OBD_STATFS_PTLRPCD &&
1452 lov_set_finished(set, 0)) {
1453 lov_statfs_interpret(NULL, set, set->set_count !=
1454 atomic_read(&set->set_success));
1455 }
1456
1457 return 0;
1458 }
1459
1460 int lov_prep_statfs_set(struct obd_device *obd, struct obd_info *oinfo,
1461 struct lov_request_set **reqset)
1462 {
1463 struct lov_request_set *set;
1464 struct lov_obd *lov = &obd->u.lov;
1465 int rc = 0, i;
1466
1467 OBD_ALLOC(set, sizeof(*set));
1468 if (set == NULL)
1469 return -ENOMEM;
1470 lov_init_set(set);
1471
1472 set->set_obd = obd;
1473 set->set_oi = oinfo;
1474
1475 /* We only get block data from the OBD */
1476 for (i = 0; i < lov->desc.ld_tgt_count; i++) {
1477 struct lov_request *req;
1478
1479 if (lov->lov_tgts[i] == NULL ||
1480 (!lov_check_and_wait_active(lov, i) &&
1481 (oinfo->oi_flags & OBD_STATFS_NODELAY))) {
1482 CDEBUG(D_HA, "lov idx %d inactive\n", i);
1483 continue;
1484 }
1485
1486 /* skip targets that have been explicitly disabled by the
1487 * administrator */
1488 if (!lov->lov_tgts[i]->ltd_exp) {
1489 CDEBUG(D_HA, "lov idx %d administratively disabled\n", i);
1490 continue;
1491 }
1492
1493 OBD_ALLOC(req, sizeof(*req));
1494 if (req == NULL)
1495 GOTO(out_set, rc = -ENOMEM);
1496
1497 OBD_ALLOC(req->rq_oi.oi_osfs, sizeof(*req->rq_oi.oi_osfs));
1498 if (req->rq_oi.oi_osfs == NULL) {
1499 OBD_FREE(req, sizeof(*req));
1500 GOTO(out_set, rc = -ENOMEM);
1501 }
1502
1503 req->rq_idx = i;
1504 req->rq_oi.oi_cb_up = cb_statfs_update;
1505 req->rq_oi.oi_flags = oinfo->oi_flags;
1506
1507 lov_set_add_req(req, set);
1508 }
1509 if (!set->set_count)
1510 GOTO(out_set, rc = -EIO);
1511 *reqset = set;
1512 return rc;
1513 out_set:
1514 lov_fini_statfs_set(set);
1515 return rc;
1516 }
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