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/lustre/lustre_idl.h"
43 #include "lov_internal.h"
44
lov_init_set(struct lov_request_set * set)45 static void lov_init_set(struct lov_request_set *set)
46 {
47 set->set_count = 0;
48 atomic_set(&set->set_completes, 0);
49 atomic_set(&set->set_success, 0);
50 atomic_set(&set->set_finish_checked, 0);
51 set->set_cookies = NULL;
52 INIT_LIST_HEAD(&set->set_list);
53 atomic_set(&set->set_refcount, 1);
54 init_waitqueue_head(&set->set_waitq);
55 spin_lock_init(&set->set_lock);
56 }
57
lov_finish_set(struct lov_request_set * set)58 void lov_finish_set(struct lov_request_set *set)
59 {
60 struct list_head *pos, *n;
61
62 LASSERT(set);
63 list_for_each_safe(pos, n, &set->set_list) {
64 struct lov_request *req = list_entry(pos,
65 struct lov_request,
66 rq_link);
67 list_del_init(&req->rq_link);
68
69 if (req->rq_oi.oi_oa)
70 OBDO_FREE(req->rq_oi.oi_oa);
71 if (req->rq_oi.oi_md)
72 OBD_FREE_LARGE(req->rq_oi.oi_md, req->rq_buflen);
73 if (req->rq_oi.oi_osfs)
74 OBD_FREE(req->rq_oi.oi_osfs,
75 sizeof(*req->rq_oi.oi_osfs));
76 OBD_FREE(req, sizeof(*req));
77 }
78
79 if (set->set_pga) {
80 int len = set->set_oabufs * sizeof(*set->set_pga);
81 OBD_FREE_LARGE(set->set_pga, len);
82 }
83 if (set->set_lockh)
84 lov_llh_put(set->set_lockh);
85
86 OBD_FREE(set, sizeof(*set));
87 }
88
lov_set_finished(struct lov_request_set * set,int idempotent)89 int lov_set_finished(struct lov_request_set *set, int idempotent)
90 {
91 int completes = atomic_read(&set->set_completes);
92
93 CDEBUG(D_INFO, "check set %d/%d\n", completes, set->set_count);
94
95 if (completes == set->set_count) {
96 if (idempotent)
97 return 1;
98 if (atomic_inc_return(&set->set_finish_checked) == 1)
99 return 1;
100 }
101 return 0;
102 }
103
lov_update_set(struct lov_request_set * set,struct lov_request * req,int rc)104 void lov_update_set(struct lov_request_set *set,
105 struct lov_request *req, int rc)
106 {
107 req->rq_complete = 1;
108 req->rq_rc = rc;
109
110 atomic_inc(&set->set_completes);
111 if (rc == 0)
112 atomic_inc(&set->set_success);
113
114 wake_up(&set->set_waitq);
115 }
116
lov_update_common_set(struct lov_request_set * set,struct lov_request * req,int rc)117 int lov_update_common_set(struct lov_request_set *set,
118 struct lov_request *req, int rc)
119 {
120 struct lov_obd *lov = &set->set_exp->exp_obd->u.lov;
121
122 lov_update_set(set, req, rc);
123
124 /* grace error on inactive ost */
125 if (rc && !(lov->lov_tgts[req->rq_idx] &&
126 lov->lov_tgts[req->rq_idx]->ltd_active))
127 rc = 0;
128
129 /* FIXME in raid1 regime, should return 0 */
130 return rc;
131 }
132
lov_set_add_req(struct lov_request * req,struct lov_request_set * set)133 void lov_set_add_req(struct lov_request *req, struct lov_request_set *set)
134 {
135 list_add_tail(&req->rq_link, &set->set_list);
136 set->set_count++;
137 req->rq_rqset = set;
138 }
139
lov_check_set(struct lov_obd * lov,int idx)140 static int lov_check_set(struct lov_obd *lov, int idx)
141 {
142 int rc;
143 struct lov_tgt_desc *tgt;
144
145 mutex_lock(&lov->lov_lock);
146 tgt = lov->lov_tgts[idx];
147 rc = !tgt || tgt->ltd_active ||
148 (tgt->ltd_exp &&
149 class_exp2cliimp(tgt->ltd_exp)->imp_connect_tried);
150 mutex_unlock(&lov->lov_lock);
151
152 return rc;
153 }
154
155 /* Check if the OSC connection exists and is active.
156 * If the OSC has not yet had a chance to connect to the OST the first time,
157 * wait once for it to connect instead of returning an error.
158 */
lov_check_and_wait_active(struct lov_obd * lov,int ost_idx)159 int lov_check_and_wait_active(struct lov_obd *lov, int ost_idx)
160 {
161 wait_queue_head_t waitq;
162 struct l_wait_info lwi;
163 struct lov_tgt_desc *tgt;
164 int rc = 0;
165
166 mutex_lock(&lov->lov_lock);
167
168 tgt = lov->lov_tgts[ost_idx];
169
170 if (unlikely(tgt == NULL)) {
171 rc = 0;
172 goto out;
173 }
174
175 if (likely(tgt->ltd_active)) {
176 rc = 1;
177 goto out;
178 }
179
180 if (tgt->ltd_exp && class_exp2cliimp(tgt->ltd_exp)->imp_connect_tried) {
181 rc = 0;
182 goto out;
183 }
184
185 mutex_unlock(&lov->lov_lock);
186
187 init_waitqueue_head(&waitq);
188 lwi = LWI_TIMEOUT_INTERVAL(cfs_time_seconds(obd_timeout),
189 cfs_time_seconds(1), NULL, NULL);
190
191 rc = l_wait_event(waitq, lov_check_set(lov, ost_idx), &lwi);
192 if (tgt != NULL && tgt->ltd_active)
193 return 1;
194
195 return 0;
196
197 out:
198 mutex_unlock(&lov->lov_lock);
199 return rc;
200 }
201
common_attr_done(struct lov_request_set * set)202 static int common_attr_done(struct lov_request_set *set)
203 {
204 struct list_head *pos;
205 struct lov_request *req;
206 struct obdo *tmp_oa;
207 int rc = 0, attrset = 0;
208
209 LASSERT(set->set_oi != NULL);
210
211 if (set->set_oi->oi_oa == NULL)
212 return 0;
213
214 if (!atomic_read(&set->set_success))
215 return -EIO;
216
217 OBDO_ALLOC(tmp_oa);
218 if (tmp_oa == NULL) {
219 rc = -ENOMEM;
220 goto out;
221 }
222
223 list_for_each(pos, &set->set_list) {
224 req = list_entry(pos, struct lov_request, rq_link);
225
226 if (!req->rq_complete || req->rq_rc)
227 continue;
228 if (req->rq_oi.oi_oa->o_valid == 0) /* inactive stripe */
229 continue;
230 lov_merge_attrs(tmp_oa, req->rq_oi.oi_oa,
231 req->rq_oi.oi_oa->o_valid,
232 set->set_oi->oi_md, req->rq_stripe, &attrset);
233 }
234 if (!attrset) {
235 CERROR("No stripes had valid attrs\n");
236 rc = -EIO;
237 }
238 if ((set->set_oi->oi_oa->o_valid & OBD_MD_FLEPOCH) &&
239 (set->set_oi->oi_md->lsm_stripe_count != attrset)) {
240 /* When we take attributes of some epoch, we require all the
241 * ost to be active. */
242 CERROR("Not all the stripes had valid attrs\n");
243 rc = -EIO;
244 goto out;
245 }
246
247 tmp_oa->o_oi = set->set_oi->oi_oa->o_oi;
248 memcpy(set->set_oi->oi_oa, tmp_oa, sizeof(*set->set_oi->oi_oa));
249 out:
250 if (tmp_oa)
251 OBDO_FREE(tmp_oa);
252 return rc;
253
254 }
255
lov_fini_getattr_set(struct lov_request_set * set)256 int lov_fini_getattr_set(struct lov_request_set *set)
257 {
258 int rc = 0;
259
260 if (set == NULL)
261 return 0;
262 LASSERT(set->set_exp);
263 if (atomic_read(&set->set_completes))
264 rc = common_attr_done(set);
265
266 lov_put_reqset(set);
267
268 return rc;
269 }
270
271 /* The callback for osc_getattr_async that finalizes a request info when a
272 * response is received. */
cb_getattr_update(void * cookie,int rc)273 static int cb_getattr_update(void *cookie, int rc)
274 {
275 struct obd_info *oinfo = cookie;
276 struct lov_request *lovreq;
277
278 lovreq = container_of(oinfo, struct lov_request, rq_oi);
279 return lov_update_common_set(lovreq->rq_rqset, lovreq, rc);
280 }
281
lov_prep_getattr_set(struct obd_export * exp,struct obd_info * oinfo,struct lov_request_set ** reqset)282 int lov_prep_getattr_set(struct obd_export *exp, struct obd_info *oinfo,
283 struct lov_request_set **reqset)
284 {
285 struct lov_request_set *set;
286 struct lov_obd *lov = &exp->exp_obd->u.lov;
287 int rc = 0, i;
288
289 OBD_ALLOC(set, sizeof(*set));
290 if (set == NULL)
291 return -ENOMEM;
292 lov_init_set(set);
293
294 set->set_exp = exp;
295 set->set_oi = oinfo;
296
297 for (i = 0; i < oinfo->oi_md->lsm_stripe_count; i++) {
298 struct lov_oinfo *loi;
299 struct lov_request *req;
300
301 loi = oinfo->oi_md->lsm_oinfo[i];
302 if (lov_oinfo_is_dummy(loi))
303 continue;
304
305 if (!lov_check_and_wait_active(lov, loi->loi_ost_idx)) {
306 CDEBUG(D_HA, "lov idx %d inactive\n", loi->loi_ost_idx);
307 if (oinfo->oi_oa->o_valid & OBD_MD_FLEPOCH) {
308 /* SOM requires all the OSTs to be active. */
309 rc = -EIO;
310 goto out_set;
311 }
312 continue;
313 }
314
315 OBD_ALLOC(req, sizeof(*req));
316 if (req == NULL) {
317 rc = -ENOMEM;
318 goto out_set;
319 }
320
321 req->rq_stripe = i;
322 req->rq_idx = loi->loi_ost_idx;
323
324 OBDO_ALLOC(req->rq_oi.oi_oa);
325 if (req->rq_oi.oi_oa == NULL) {
326 OBD_FREE(req, sizeof(*req));
327 rc = -ENOMEM;
328 goto out_set;
329 }
330 memcpy(req->rq_oi.oi_oa, oinfo->oi_oa,
331 sizeof(*req->rq_oi.oi_oa));
332 req->rq_oi.oi_oa->o_oi = loi->loi_oi;
333 req->rq_oi.oi_cb_up = cb_getattr_update;
334 req->rq_oi.oi_capa = oinfo->oi_capa;
335
336 lov_set_add_req(req, set);
337 }
338 if (!set->set_count) {
339 rc = -EIO;
340 goto out_set;
341 }
342 *reqset = set;
343 return rc;
344 out_set:
345 lov_fini_getattr_set(set);
346 return rc;
347 }
348
lov_fini_destroy_set(struct lov_request_set * set)349 int lov_fini_destroy_set(struct lov_request_set *set)
350 {
351 if (set == NULL)
352 return 0;
353 LASSERT(set->set_exp);
354 if (atomic_read(&set->set_completes)) {
355 /* FIXME update qos data here */
356 }
357
358 lov_put_reqset(set);
359
360 return 0;
361 }
362
lov_prep_destroy_set(struct obd_export * exp,struct obd_info * oinfo,struct obdo * src_oa,struct lov_stripe_md * lsm,struct obd_trans_info * oti,struct lov_request_set ** reqset)363 int lov_prep_destroy_set(struct obd_export *exp, struct obd_info *oinfo,
364 struct obdo *src_oa, struct lov_stripe_md *lsm,
365 struct obd_trans_info *oti,
366 struct lov_request_set **reqset)
367 {
368 struct lov_request_set *set;
369 struct lov_obd *lov = &exp->exp_obd->u.lov;
370 int rc = 0, i;
371
372 OBD_ALLOC(set, sizeof(*set));
373 if (set == NULL)
374 return -ENOMEM;
375 lov_init_set(set);
376
377 set->set_exp = exp;
378 set->set_oi = oinfo;
379 set->set_oi->oi_md = lsm;
380 set->set_oi->oi_oa = src_oa;
381 set->set_oti = oti;
382 if (oti != NULL && src_oa->o_valid & OBD_MD_FLCOOKIE)
383 set->set_cookies = oti->oti_logcookies;
384
385 for (i = 0; i < lsm->lsm_stripe_count; i++) {
386 struct lov_oinfo *loi;
387 struct lov_request *req;
388
389 loi = lsm->lsm_oinfo[i];
390 if (lov_oinfo_is_dummy(loi))
391 continue;
392
393 if (!lov_check_and_wait_active(lov, loi->loi_ost_idx)) {
394 CDEBUG(D_HA, "lov idx %d inactive\n", loi->loi_ost_idx);
395 continue;
396 }
397
398 OBD_ALLOC(req, sizeof(*req));
399 if (req == NULL) {
400 rc = -ENOMEM;
401 goto out_set;
402 }
403
404 req->rq_stripe = i;
405 req->rq_idx = loi->loi_ost_idx;
406
407 OBDO_ALLOC(req->rq_oi.oi_oa);
408 if (req->rq_oi.oi_oa == NULL) {
409 OBD_FREE(req, sizeof(*req));
410 rc = -ENOMEM;
411 goto out_set;
412 }
413 memcpy(req->rq_oi.oi_oa, src_oa, sizeof(*req->rq_oi.oi_oa));
414 req->rq_oi.oi_oa->o_oi = loi->loi_oi;
415 lov_set_add_req(req, set);
416 }
417 if (!set->set_count) {
418 rc = -EIO;
419 goto out_set;
420 }
421 *reqset = set;
422 return rc;
423 out_set:
424 lov_fini_destroy_set(set);
425 return rc;
426 }
427
lov_fini_setattr_set(struct lov_request_set * set)428 int lov_fini_setattr_set(struct lov_request_set *set)
429 {
430 int rc = 0;
431
432 if (set == NULL)
433 return 0;
434 LASSERT(set->set_exp);
435 if (atomic_read(&set->set_completes)) {
436 rc = common_attr_done(set);
437 /* FIXME update qos data here */
438 }
439
440 lov_put_reqset(set);
441 return rc;
442 }
443
lov_update_setattr_set(struct lov_request_set * set,struct lov_request * req,int rc)444 int lov_update_setattr_set(struct lov_request_set *set,
445 struct lov_request *req, int rc)
446 {
447 struct lov_obd *lov = &req->rq_rqset->set_exp->exp_obd->u.lov;
448 struct lov_stripe_md *lsm = req->rq_rqset->set_oi->oi_md;
449
450 lov_update_set(set, req, rc);
451
452 /* grace error on inactive ost */
453 if (rc && !(lov->lov_tgts[req->rq_idx] &&
454 lov->lov_tgts[req->rq_idx]->ltd_active))
455 rc = 0;
456
457 if (rc == 0) {
458 if (req->rq_oi.oi_oa->o_valid & OBD_MD_FLCTIME)
459 lsm->lsm_oinfo[req->rq_stripe]->loi_lvb.lvb_ctime =
460 req->rq_oi.oi_oa->o_ctime;
461 if (req->rq_oi.oi_oa->o_valid & OBD_MD_FLMTIME)
462 lsm->lsm_oinfo[req->rq_stripe]->loi_lvb.lvb_mtime =
463 req->rq_oi.oi_oa->o_mtime;
464 if (req->rq_oi.oi_oa->o_valid & OBD_MD_FLATIME)
465 lsm->lsm_oinfo[req->rq_stripe]->loi_lvb.lvb_atime =
466 req->rq_oi.oi_oa->o_atime;
467 }
468
469 return rc;
470 }
471
472 /* The callback for osc_setattr_async that finalizes a request info when a
473 * response is received. */
cb_setattr_update(void * cookie,int rc)474 static int cb_setattr_update(void *cookie, int rc)
475 {
476 struct obd_info *oinfo = cookie;
477 struct lov_request *lovreq;
478
479 lovreq = container_of(oinfo, struct lov_request, rq_oi);
480 return lov_update_setattr_set(lovreq->rq_rqset, lovreq, rc);
481 }
482
lov_prep_setattr_set(struct obd_export * exp,struct obd_info * oinfo,struct obd_trans_info * oti,struct lov_request_set ** reqset)483 int lov_prep_setattr_set(struct obd_export *exp, struct obd_info *oinfo,
484 struct obd_trans_info *oti,
485 struct lov_request_set **reqset)
486 {
487 struct lov_request_set *set;
488 struct lov_obd *lov = &exp->exp_obd->u.lov;
489 int rc = 0, i;
490
491 OBD_ALLOC(set, sizeof(*set));
492 if (set == NULL)
493 return -ENOMEM;
494 lov_init_set(set);
495
496 set->set_exp = exp;
497 set->set_oti = oti;
498 set->set_oi = oinfo;
499 if (oti != NULL && oinfo->oi_oa->o_valid & OBD_MD_FLCOOKIE)
500 set->set_cookies = oti->oti_logcookies;
501
502 for (i = 0; i < oinfo->oi_md->lsm_stripe_count; i++) {
503 struct lov_oinfo *loi = oinfo->oi_md->lsm_oinfo[i];
504 struct lov_request *req;
505
506 if (lov_oinfo_is_dummy(loi))
507 continue;
508
509 if (!lov_check_and_wait_active(lov, loi->loi_ost_idx)) {
510 CDEBUG(D_HA, "lov idx %d inactive\n", loi->loi_ost_idx);
511 continue;
512 }
513
514 OBD_ALLOC(req, sizeof(*req));
515 if (req == NULL) {
516 rc = -ENOMEM;
517 goto out_set;
518 }
519 req->rq_stripe = i;
520 req->rq_idx = loi->loi_ost_idx;
521
522 OBDO_ALLOC(req->rq_oi.oi_oa);
523 if (req->rq_oi.oi_oa == NULL) {
524 OBD_FREE(req, sizeof(*req));
525 rc = -ENOMEM;
526 goto out_set;
527 }
528 memcpy(req->rq_oi.oi_oa, oinfo->oi_oa,
529 sizeof(*req->rq_oi.oi_oa));
530 req->rq_oi.oi_oa->o_oi = loi->loi_oi;
531 req->rq_oi.oi_oa->o_stripe_idx = i;
532 req->rq_oi.oi_cb_up = cb_setattr_update;
533 req->rq_oi.oi_capa = oinfo->oi_capa;
534
535 if (oinfo->oi_oa->o_valid & OBD_MD_FLSIZE) {
536 int off = lov_stripe_offset(oinfo->oi_md,
537 oinfo->oi_oa->o_size, i,
538 &req->rq_oi.oi_oa->o_size);
539
540 if (off < 0 && req->rq_oi.oi_oa->o_size)
541 req->rq_oi.oi_oa->o_size--;
542
543 CDEBUG(D_INODE, "stripe %d has size %llu/%llu\n",
544 i, req->rq_oi.oi_oa->o_size,
545 oinfo->oi_oa->o_size);
546 }
547 lov_set_add_req(req, set);
548 }
549 if (!set->set_count) {
550 rc = -EIO;
551 goto out_set;
552 }
553 *reqset = set;
554 return rc;
555 out_set:
556 lov_fini_setattr_set(set);
557 return rc;
558 }
559
560 #define LOV_U64_MAX ((__u64)~0ULL)
561 #define LOV_SUM_MAX(tot, add) \
562 do { \
563 if ((tot) + (add) < (tot)) \
564 (tot) = LOV_U64_MAX; \
565 else \
566 (tot) += (add); \
567 } while (0)
568
lov_fini_statfs(struct obd_device * obd,struct obd_statfs * osfs,int success)569 int lov_fini_statfs(struct obd_device *obd, struct obd_statfs *osfs,
570 int success)
571 {
572 if (success) {
573 __u32 expected_stripes = lov_get_stripecnt(&obd->u.lov,
574 LOV_MAGIC, 0);
575 if (osfs->os_files != LOV_U64_MAX)
576 lov_do_div64(osfs->os_files, expected_stripes);
577 if (osfs->os_ffree != LOV_U64_MAX)
578 lov_do_div64(osfs->os_ffree, expected_stripes);
579
580 spin_lock(&obd->obd_osfs_lock);
581 memcpy(&obd->obd_osfs, osfs, sizeof(*osfs));
582 obd->obd_osfs_age = cfs_time_current_64();
583 spin_unlock(&obd->obd_osfs_lock);
584 return 0;
585 }
586
587 return -EIO;
588 }
589
lov_fini_statfs_set(struct lov_request_set * set)590 int lov_fini_statfs_set(struct lov_request_set *set)
591 {
592 int rc = 0;
593
594 if (set == NULL)
595 return 0;
596
597 if (atomic_read(&set->set_completes)) {
598 rc = lov_fini_statfs(set->set_obd, set->set_oi->oi_osfs,
599 atomic_read(&set->set_success));
600 }
601 lov_put_reqset(set);
602 return rc;
603 }
604
lov_update_statfs(struct obd_statfs * osfs,struct obd_statfs * lov_sfs,int success)605 void lov_update_statfs(struct obd_statfs *osfs, struct obd_statfs *lov_sfs,
606 int success)
607 {
608 int shift = 0, quit = 0;
609 __u64 tmp;
610
611 if (success == 0) {
612 memcpy(osfs, lov_sfs, sizeof(*lov_sfs));
613 } else {
614 if (osfs->os_bsize != lov_sfs->os_bsize) {
615 /* assume all block sizes are always powers of 2 */
616 /* get the bits difference */
617 tmp = osfs->os_bsize | lov_sfs->os_bsize;
618 for (shift = 0; shift <= 64; ++shift) {
619 if (tmp & 1) {
620 if (quit)
621 break;
622 else
623 quit = 1;
624 shift = 0;
625 }
626 tmp >>= 1;
627 }
628 }
629
630 if (osfs->os_bsize < lov_sfs->os_bsize) {
631 osfs->os_bsize = lov_sfs->os_bsize;
632
633 osfs->os_bfree >>= shift;
634 osfs->os_bavail >>= shift;
635 osfs->os_blocks >>= shift;
636 } else if (shift != 0) {
637 lov_sfs->os_bfree >>= shift;
638 lov_sfs->os_bavail >>= shift;
639 lov_sfs->os_blocks >>= shift;
640 }
641 osfs->os_bfree += lov_sfs->os_bfree;
642 osfs->os_bavail += lov_sfs->os_bavail;
643 osfs->os_blocks += lov_sfs->os_blocks;
644 /* XXX not sure about this one - depends on policy.
645 * - could be minimum if we always stripe on all OBDs
646 * (but that would be wrong for any other policy,
647 * if one of the OBDs has no more objects left)
648 * - could be sum if we stripe whole objects
649 * - could be average, just to give a nice number
650 *
651 * To give a "reasonable" (if not wholly accurate)
652 * number, we divide the total number of free objects
653 * by expected stripe count (watch out for overflow).
654 */
655 LOV_SUM_MAX(osfs->os_files, lov_sfs->os_files);
656 LOV_SUM_MAX(osfs->os_ffree, lov_sfs->os_ffree);
657 }
658 }
659
660 /* The callback for osc_statfs_async that finalizes a request info when a
661 * response is received. */
cb_statfs_update(void * cookie,int rc)662 static int cb_statfs_update(void *cookie, int rc)
663 {
664 struct obd_info *oinfo = cookie;
665 struct lov_request *lovreq;
666 struct lov_request_set *set;
667 struct obd_statfs *osfs, *lov_sfs;
668 struct lov_obd *lov;
669 struct lov_tgt_desc *tgt;
670 struct obd_device *lovobd, *tgtobd;
671 int success;
672
673 lovreq = container_of(oinfo, struct lov_request, rq_oi);
674 set = lovreq->rq_rqset;
675 lovobd = set->set_obd;
676 lov = &lovobd->u.lov;
677 osfs = set->set_oi->oi_osfs;
678 lov_sfs = oinfo->oi_osfs;
679 success = atomic_read(&set->set_success);
680 /* XXX: the same is done in lov_update_common_set, however
681 lovset->set_exp is not initialized. */
682 lov_update_set(set, lovreq, rc);
683 if (rc)
684 goto out;
685
686 obd_getref(lovobd);
687 tgt = lov->lov_tgts[lovreq->rq_idx];
688 if (!tgt || !tgt->ltd_active)
689 goto out_update;
690
691 tgtobd = class_exp2obd(tgt->ltd_exp);
692 spin_lock(&tgtobd->obd_osfs_lock);
693 memcpy(&tgtobd->obd_osfs, lov_sfs, sizeof(*lov_sfs));
694 if ((oinfo->oi_flags & OBD_STATFS_FROM_CACHE) == 0)
695 tgtobd->obd_osfs_age = cfs_time_current_64();
696 spin_unlock(&tgtobd->obd_osfs_lock);
697
698 out_update:
699 lov_update_statfs(osfs, lov_sfs, success);
700 obd_putref(lovobd);
701
702 out:
703 if (set->set_oi->oi_flags & OBD_STATFS_PTLRPCD &&
704 lov_set_finished(set, 0)) {
705 lov_statfs_interpret(NULL, set, set->set_count !=
706 atomic_read(&set->set_success));
707 }
708
709 return 0;
710 }
711
lov_prep_statfs_set(struct obd_device * obd,struct obd_info * oinfo,struct lov_request_set ** reqset)712 int lov_prep_statfs_set(struct obd_device *obd, struct obd_info *oinfo,
713 struct lov_request_set **reqset)
714 {
715 struct lov_request_set *set;
716 struct lov_obd *lov = &obd->u.lov;
717 int rc = 0, i;
718
719 OBD_ALLOC(set, sizeof(*set));
720 if (set == NULL)
721 return -ENOMEM;
722 lov_init_set(set);
723
724 set->set_obd = obd;
725 set->set_oi = oinfo;
726
727 /* We only get block data from the OBD */
728 for (i = 0; i < lov->desc.ld_tgt_count; i++) {
729 struct lov_request *req;
730
731 if (lov->lov_tgts[i] == NULL ||
732 (!lov_check_and_wait_active(lov, i) &&
733 (oinfo->oi_flags & OBD_STATFS_NODELAY))) {
734 CDEBUG(D_HA, "lov idx %d inactive\n", i);
735 continue;
736 }
737
738 /* skip targets that have been explicitly disabled by the
739 * administrator */
740 if (!lov->lov_tgts[i]->ltd_exp) {
741 CDEBUG(D_HA, "lov idx %d administratively disabled\n", i);
742 continue;
743 }
744
745 OBD_ALLOC(req, sizeof(*req));
746 if (req == NULL) {
747 rc = -ENOMEM;
748 goto out_set;
749 }
750
751 OBD_ALLOC(req->rq_oi.oi_osfs, sizeof(*req->rq_oi.oi_osfs));
752 if (req->rq_oi.oi_osfs == NULL) {
753 OBD_FREE(req, sizeof(*req));
754 rc = -ENOMEM;
755 goto out_set;
756 }
757
758 req->rq_idx = i;
759 req->rq_oi.oi_cb_up = cb_statfs_update;
760 req->rq_oi.oi_flags = oinfo->oi_flags;
761
762 lov_set_add_req(req, set);
763 }
764 if (!set->set_count) {
765 rc = -EIO;
766 goto out_set;
767 }
768 *reqset = set;
769 return rc;
770 out_set:
771 lov_fini_statfs_set(set);
772 return rc;
773 }
774