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staging: lustre: remove LPX64 define
[deliverable/linux.git] / drivers / staging / lustre / lustre / osc / osc_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) 2002, 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_OSC
38
39 #include "../../include/linux/libcfs/libcfs.h"
40
41
42 #include "../include/lustre_dlm.h"
43 #include "../include/lustre_net.h"
44 #include "../include/lustre/lustre_user.h"
45 #include "../include/obd_cksum.h"
46 #include "../include/obd_ost.h"
47
48 #include "../include/lustre_ha.h"
49 #include "../include/lprocfs_status.h"
50 #include "../include/lustre_log.h"
51 #include "../include/lustre_debug.h"
52 #include "../include/lustre_param.h"
53 #include "../include/lustre_fid.h"
54 #include "osc_internal.h"
55 #include "osc_cl_internal.h"
56
57 static void osc_release_ppga(struct brw_page **ppga, obd_count count);
58 static int brw_interpret(const struct lu_env *env,
59 struct ptlrpc_request *req, void *data, int rc);
60 int osc_cleanup(struct obd_device *obd);
61
62 /* Pack OSC object metadata for disk storage (LE byte order). */
63 static int osc_packmd(struct obd_export *exp, struct lov_mds_md **lmmp,
64 struct lov_stripe_md *lsm)
65 {
66 int lmm_size;
67
68 lmm_size = sizeof(**lmmp);
69 if (lmmp == NULL)
70 return lmm_size;
71
72 if (*lmmp != NULL && lsm == NULL) {
73 OBD_FREE(*lmmp, lmm_size);
74 *lmmp = NULL;
75 return 0;
76 } else if (unlikely(lsm != NULL && ostid_id(&lsm->lsm_oi) == 0)) {
77 return -EBADF;
78 }
79
80 if (*lmmp == NULL) {
81 OBD_ALLOC(*lmmp, lmm_size);
82 if (*lmmp == NULL)
83 return -ENOMEM;
84 }
85
86 if (lsm)
87 ostid_cpu_to_le(&lsm->lsm_oi, &(*lmmp)->lmm_oi);
88
89 return lmm_size;
90 }
91
92 /* Unpack OSC object metadata from disk storage (LE byte order). */
93 static int osc_unpackmd(struct obd_export *exp, struct lov_stripe_md **lsmp,
94 struct lov_mds_md *lmm, int lmm_bytes)
95 {
96 int lsm_size;
97 struct obd_import *imp = class_exp2cliimp(exp);
98
99 if (lmm != NULL) {
100 if (lmm_bytes < sizeof(*lmm)) {
101 CERROR("%s: lov_mds_md too small: %d, need %d\n",
102 exp->exp_obd->obd_name, lmm_bytes,
103 (int)sizeof(*lmm));
104 return -EINVAL;
105 }
106 /* XXX LOV_MAGIC etc check? */
107
108 if (unlikely(ostid_id(&lmm->lmm_oi) == 0)) {
109 CERROR("%s: zero lmm_object_id: rc = %d\n",
110 exp->exp_obd->obd_name, -EINVAL);
111 return -EINVAL;
112 }
113 }
114
115 lsm_size = lov_stripe_md_size(1);
116 if (lsmp == NULL)
117 return lsm_size;
118
119 if (*lsmp != NULL && lmm == NULL) {
120 OBD_FREE((*lsmp)->lsm_oinfo[0], sizeof(struct lov_oinfo));
121 OBD_FREE(*lsmp, lsm_size);
122 *lsmp = NULL;
123 return 0;
124 }
125
126 if (*lsmp == NULL) {
127 OBD_ALLOC(*lsmp, lsm_size);
128 if (unlikely(*lsmp == NULL))
129 return -ENOMEM;
130 OBD_ALLOC((*lsmp)->lsm_oinfo[0], sizeof(struct lov_oinfo));
131 if (unlikely((*lsmp)->lsm_oinfo[0] == NULL)) {
132 OBD_FREE(*lsmp, lsm_size);
133 return -ENOMEM;
134 }
135 loi_init((*lsmp)->lsm_oinfo[0]);
136 } else if (unlikely(ostid_id(&(*lsmp)->lsm_oi) == 0)) {
137 return -EBADF;
138 }
139
140 if (lmm != NULL)
141 /* XXX zero *lsmp? */
142 ostid_le_to_cpu(&lmm->lmm_oi, &(*lsmp)->lsm_oi);
143
144 if (imp != NULL &&
145 (imp->imp_connect_data.ocd_connect_flags & OBD_CONNECT_MAXBYTES))
146 (*lsmp)->lsm_maxbytes = imp->imp_connect_data.ocd_maxbytes;
147 else
148 (*lsmp)->lsm_maxbytes = LUSTRE_STRIPE_MAXBYTES;
149
150 return lsm_size;
151 }
152
153 static inline void osc_pack_capa(struct ptlrpc_request *req,
154 struct ost_body *body, void *capa)
155 {
156 struct obd_capa *oc = (struct obd_capa *)capa;
157 struct lustre_capa *c;
158
159 if (!capa)
160 return;
161
162 c = req_capsule_client_get(&req->rq_pill, &RMF_CAPA1);
163 LASSERT(c);
164 capa_cpy(c, oc);
165 body->oa.o_valid |= OBD_MD_FLOSSCAPA;
166 DEBUG_CAPA(D_SEC, c, "pack");
167 }
168
169 static inline void osc_pack_req_body(struct ptlrpc_request *req,
170 struct obd_info *oinfo)
171 {
172 struct ost_body *body;
173
174 body = req_capsule_client_get(&req->rq_pill, &RMF_OST_BODY);
175 LASSERT(body);
176
177 lustre_set_wire_obdo(&req->rq_import->imp_connect_data, &body->oa,
178 oinfo->oi_oa);
179 osc_pack_capa(req, body, oinfo->oi_capa);
180 }
181
182 static inline void osc_set_capa_size(struct ptlrpc_request *req,
183 const struct req_msg_field *field,
184 struct obd_capa *oc)
185 {
186 if (oc == NULL)
187 req_capsule_set_size(&req->rq_pill, field, RCL_CLIENT, 0);
188 else
189 /* it is already calculated as sizeof struct obd_capa */
190 ;
191 }
192
193 static int osc_getattr_interpret(const struct lu_env *env,
194 struct ptlrpc_request *req,
195 struct osc_async_args *aa, int rc)
196 {
197 struct ost_body *body;
198
199 if (rc != 0)
200 GOTO(out, rc);
201
202 body = req_capsule_server_get(&req->rq_pill, &RMF_OST_BODY);
203 if (body) {
204 CDEBUG(D_INODE, "mode: %o\n", body->oa.o_mode);
205 lustre_get_wire_obdo(&req->rq_import->imp_connect_data,
206 aa->aa_oi->oi_oa, &body->oa);
207
208 /* This should really be sent by the OST */
209 aa->aa_oi->oi_oa->o_blksize = DT_MAX_BRW_SIZE;
210 aa->aa_oi->oi_oa->o_valid |= OBD_MD_FLBLKSZ;
211 } else {
212 CDEBUG(D_INFO, "can't unpack ost_body\n");
213 rc = -EPROTO;
214 aa->aa_oi->oi_oa->o_valid = 0;
215 }
216 out:
217 rc = aa->aa_oi->oi_cb_up(aa->aa_oi, rc);
218 return rc;
219 }
220
221 static int osc_getattr_async(struct obd_export *exp, struct obd_info *oinfo,
222 struct ptlrpc_request_set *set)
223 {
224 struct ptlrpc_request *req;
225 struct osc_async_args *aa;
226 int rc;
227
228 req = ptlrpc_request_alloc(class_exp2cliimp(exp), &RQF_OST_GETATTR);
229 if (req == NULL)
230 return -ENOMEM;
231
232 osc_set_capa_size(req, &RMF_CAPA1, oinfo->oi_capa);
233 rc = ptlrpc_request_pack(req, LUSTRE_OST_VERSION, OST_GETATTR);
234 if (rc) {
235 ptlrpc_request_free(req);
236 return rc;
237 }
238
239 osc_pack_req_body(req, oinfo);
240
241 ptlrpc_request_set_replen(req);
242 req->rq_interpret_reply = (ptlrpc_interpterer_t)osc_getattr_interpret;
243
244 CLASSERT(sizeof(*aa) <= sizeof(req->rq_async_args));
245 aa = ptlrpc_req_async_args(req);
246 aa->aa_oi = oinfo;
247
248 ptlrpc_set_add_req(set, req);
249 return 0;
250 }
251
252 static int osc_getattr(const struct lu_env *env, struct obd_export *exp,
253 struct obd_info *oinfo)
254 {
255 struct ptlrpc_request *req;
256 struct ost_body *body;
257 int rc;
258
259 req = ptlrpc_request_alloc(class_exp2cliimp(exp), &RQF_OST_GETATTR);
260 if (req == NULL)
261 return -ENOMEM;
262
263 osc_set_capa_size(req, &RMF_CAPA1, oinfo->oi_capa);
264 rc = ptlrpc_request_pack(req, LUSTRE_OST_VERSION, OST_GETATTR);
265 if (rc) {
266 ptlrpc_request_free(req);
267 return rc;
268 }
269
270 osc_pack_req_body(req, oinfo);
271
272 ptlrpc_request_set_replen(req);
273
274 rc = ptlrpc_queue_wait(req);
275 if (rc)
276 GOTO(out, rc);
277
278 body = req_capsule_server_get(&req->rq_pill, &RMF_OST_BODY);
279 if (body == NULL)
280 GOTO(out, rc = -EPROTO);
281
282 CDEBUG(D_INODE, "mode: %o\n", body->oa.o_mode);
283 lustre_get_wire_obdo(&req->rq_import->imp_connect_data, oinfo->oi_oa,
284 &body->oa);
285
286 oinfo->oi_oa->o_blksize = cli_brw_size(exp->exp_obd);
287 oinfo->oi_oa->o_valid |= OBD_MD_FLBLKSZ;
288
289 out:
290 ptlrpc_req_finished(req);
291 return rc;
292 }
293
294 static int osc_setattr(const struct lu_env *env, struct obd_export *exp,
295 struct obd_info *oinfo, struct obd_trans_info *oti)
296 {
297 struct ptlrpc_request *req;
298 struct ost_body *body;
299 int rc;
300
301 LASSERT(oinfo->oi_oa->o_valid & OBD_MD_FLGROUP);
302
303 req = ptlrpc_request_alloc(class_exp2cliimp(exp), &RQF_OST_SETATTR);
304 if (req == NULL)
305 return -ENOMEM;
306
307 osc_set_capa_size(req, &RMF_CAPA1, oinfo->oi_capa);
308 rc = ptlrpc_request_pack(req, LUSTRE_OST_VERSION, OST_SETATTR);
309 if (rc) {
310 ptlrpc_request_free(req);
311 return rc;
312 }
313
314 osc_pack_req_body(req, oinfo);
315
316 ptlrpc_request_set_replen(req);
317
318 rc = ptlrpc_queue_wait(req);
319 if (rc)
320 GOTO(out, rc);
321
322 body = req_capsule_server_get(&req->rq_pill, &RMF_OST_BODY);
323 if (body == NULL)
324 GOTO(out, rc = -EPROTO);
325
326 lustre_get_wire_obdo(&req->rq_import->imp_connect_data, oinfo->oi_oa,
327 &body->oa);
328
329 out:
330 ptlrpc_req_finished(req);
331 return rc;
332 }
333
334 static int osc_setattr_interpret(const struct lu_env *env,
335 struct ptlrpc_request *req,
336 struct osc_setattr_args *sa, int rc)
337 {
338 struct ost_body *body;
339
340 if (rc != 0)
341 GOTO(out, rc);
342
343 body = req_capsule_server_get(&req->rq_pill, &RMF_OST_BODY);
344 if (body == NULL)
345 GOTO(out, rc = -EPROTO);
346
347 lustre_get_wire_obdo(&req->rq_import->imp_connect_data, sa->sa_oa,
348 &body->oa);
349 out:
350 rc = sa->sa_upcall(sa->sa_cookie, rc);
351 return rc;
352 }
353
354 int osc_setattr_async_base(struct obd_export *exp, struct obd_info *oinfo,
355 struct obd_trans_info *oti,
356 obd_enqueue_update_f upcall, void *cookie,
357 struct ptlrpc_request_set *rqset)
358 {
359 struct ptlrpc_request *req;
360 struct osc_setattr_args *sa;
361 int rc;
362
363 req = ptlrpc_request_alloc(class_exp2cliimp(exp), &RQF_OST_SETATTR);
364 if (req == NULL)
365 return -ENOMEM;
366
367 osc_set_capa_size(req, &RMF_CAPA1, oinfo->oi_capa);
368 rc = ptlrpc_request_pack(req, LUSTRE_OST_VERSION, OST_SETATTR);
369 if (rc) {
370 ptlrpc_request_free(req);
371 return rc;
372 }
373
374 if (oti && oinfo->oi_oa->o_valid & OBD_MD_FLCOOKIE)
375 oinfo->oi_oa->o_lcookie = *oti->oti_logcookies;
376
377 osc_pack_req_body(req, oinfo);
378
379 ptlrpc_request_set_replen(req);
380
381 /* do mds to ost setattr asynchronously */
382 if (!rqset) {
383 /* Do not wait for response. */
384 ptlrpcd_add_req(req, PDL_POLICY_ROUND, -1);
385 } else {
386 req->rq_interpret_reply =
387 (ptlrpc_interpterer_t)osc_setattr_interpret;
388
389 CLASSERT (sizeof(*sa) <= sizeof(req->rq_async_args));
390 sa = ptlrpc_req_async_args(req);
391 sa->sa_oa = oinfo->oi_oa;
392 sa->sa_upcall = upcall;
393 sa->sa_cookie = cookie;
394
395 if (rqset == PTLRPCD_SET)
396 ptlrpcd_add_req(req, PDL_POLICY_ROUND, -1);
397 else
398 ptlrpc_set_add_req(rqset, req);
399 }
400
401 return 0;
402 }
403
404 static int osc_setattr_async(struct obd_export *exp, struct obd_info *oinfo,
405 struct obd_trans_info *oti,
406 struct ptlrpc_request_set *rqset)
407 {
408 return osc_setattr_async_base(exp, oinfo, oti,
409 oinfo->oi_cb_up, oinfo, rqset);
410 }
411
412 int osc_real_create(struct obd_export *exp, struct obdo *oa,
413 struct lov_stripe_md **ea, struct obd_trans_info *oti)
414 {
415 struct ptlrpc_request *req;
416 struct ost_body *body;
417 struct lov_stripe_md *lsm;
418 int rc;
419
420 LASSERT(oa);
421 LASSERT(ea);
422
423 lsm = *ea;
424 if (!lsm) {
425 rc = obd_alloc_memmd(exp, &lsm);
426 if (rc < 0)
427 return rc;
428 }
429
430 req = ptlrpc_request_alloc(class_exp2cliimp(exp), &RQF_OST_CREATE);
431 if (req == NULL)
432 GOTO(out, rc = -ENOMEM);
433
434 rc = ptlrpc_request_pack(req, LUSTRE_OST_VERSION, OST_CREATE);
435 if (rc) {
436 ptlrpc_request_free(req);
437 GOTO(out, rc);
438 }
439
440 body = req_capsule_client_get(&req->rq_pill, &RMF_OST_BODY);
441 LASSERT(body);
442
443 lustre_set_wire_obdo(&req->rq_import->imp_connect_data, &body->oa, oa);
444
445 ptlrpc_request_set_replen(req);
446
447 if ((oa->o_valid & OBD_MD_FLFLAGS) &&
448 oa->o_flags == OBD_FL_DELORPHAN) {
449 DEBUG_REQ(D_HA, req,
450 "delorphan from OST integration");
451 /* Don't resend the delorphan req */
452 req->rq_no_resend = req->rq_no_delay = 1;
453 }
454
455 rc = ptlrpc_queue_wait(req);
456 if (rc)
457 GOTO(out_req, rc);
458
459 body = req_capsule_server_get(&req->rq_pill, &RMF_OST_BODY);
460 if (body == NULL)
461 GOTO(out_req, rc = -EPROTO);
462
463 CDEBUG(D_INFO, "oa flags %x\n", oa->o_flags);
464 lustre_get_wire_obdo(&req->rq_import->imp_connect_data, oa, &body->oa);
465
466 oa->o_blksize = cli_brw_size(exp->exp_obd);
467 oa->o_valid |= OBD_MD_FLBLKSZ;
468
469 /* XXX LOV STACKING: the lsm that is passed to us from LOV does not
470 * have valid lsm_oinfo data structs, so don't go touching that.
471 * This needs to be fixed in a big way.
472 */
473 lsm->lsm_oi = oa->o_oi;
474 *ea = lsm;
475
476 if (oti != NULL) {
477 oti->oti_transno = lustre_msg_get_transno(req->rq_repmsg);
478
479 if (oa->o_valid & OBD_MD_FLCOOKIE) {
480 if (!oti->oti_logcookies)
481 oti_alloc_cookies(oti, 1);
482 *oti->oti_logcookies = oa->o_lcookie;
483 }
484 }
485
486 CDEBUG(D_HA, "transno: %lld\n",
487 lustre_msg_get_transno(req->rq_repmsg));
488 out_req:
489 ptlrpc_req_finished(req);
490 out:
491 if (rc && !*ea)
492 obd_free_memmd(exp, &lsm);
493 return rc;
494 }
495
496 int osc_punch_base(struct obd_export *exp, struct obd_info *oinfo,
497 obd_enqueue_update_f upcall, void *cookie,
498 struct ptlrpc_request_set *rqset)
499 {
500 struct ptlrpc_request *req;
501 struct osc_setattr_args *sa;
502 struct ost_body *body;
503 int rc;
504
505 req = ptlrpc_request_alloc(class_exp2cliimp(exp), &RQF_OST_PUNCH);
506 if (req == NULL)
507 return -ENOMEM;
508
509 osc_set_capa_size(req, &RMF_CAPA1, oinfo->oi_capa);
510 rc = ptlrpc_request_pack(req, LUSTRE_OST_VERSION, OST_PUNCH);
511 if (rc) {
512 ptlrpc_request_free(req);
513 return rc;
514 }
515 req->rq_request_portal = OST_IO_PORTAL; /* bug 7198 */
516 ptlrpc_at_set_req_timeout(req);
517
518 body = req_capsule_client_get(&req->rq_pill, &RMF_OST_BODY);
519 LASSERT(body);
520 lustre_set_wire_obdo(&req->rq_import->imp_connect_data, &body->oa,
521 oinfo->oi_oa);
522 osc_pack_capa(req, body, oinfo->oi_capa);
523
524 ptlrpc_request_set_replen(req);
525
526 req->rq_interpret_reply = (ptlrpc_interpterer_t)osc_setattr_interpret;
527 CLASSERT (sizeof(*sa) <= sizeof(req->rq_async_args));
528 sa = ptlrpc_req_async_args(req);
529 sa->sa_oa = oinfo->oi_oa;
530 sa->sa_upcall = upcall;
531 sa->sa_cookie = cookie;
532 if (rqset == PTLRPCD_SET)
533 ptlrpcd_add_req(req, PDL_POLICY_ROUND, -1);
534 else
535 ptlrpc_set_add_req(rqset, req);
536
537 return 0;
538 }
539
540 static int osc_punch(const struct lu_env *env, struct obd_export *exp,
541 struct obd_info *oinfo, struct obd_trans_info *oti,
542 struct ptlrpc_request_set *rqset)
543 {
544 oinfo->oi_oa->o_size = oinfo->oi_policy.l_extent.start;
545 oinfo->oi_oa->o_blocks = oinfo->oi_policy.l_extent.end;
546 oinfo->oi_oa->o_valid |= OBD_MD_FLSIZE | OBD_MD_FLBLOCKS;
547 return osc_punch_base(exp, oinfo,
548 oinfo->oi_cb_up, oinfo, rqset);
549 }
550
551 static int osc_sync_interpret(const struct lu_env *env,
552 struct ptlrpc_request *req,
553 void *arg, int rc)
554 {
555 struct osc_fsync_args *fa = arg;
556 struct ost_body *body;
557
558 if (rc)
559 GOTO(out, rc);
560
561 body = req_capsule_server_get(&req->rq_pill, &RMF_OST_BODY);
562 if (body == NULL) {
563 CERROR ("can't unpack ost_body\n");
564 GOTO(out, rc = -EPROTO);
565 }
566
567 *fa->fa_oi->oi_oa = body->oa;
568 out:
569 rc = fa->fa_upcall(fa->fa_cookie, rc);
570 return rc;
571 }
572
573 int osc_sync_base(struct obd_export *exp, struct obd_info *oinfo,
574 obd_enqueue_update_f upcall, void *cookie,
575 struct ptlrpc_request_set *rqset)
576 {
577 struct ptlrpc_request *req;
578 struct ost_body *body;
579 struct osc_fsync_args *fa;
580 int rc;
581
582 req = ptlrpc_request_alloc(class_exp2cliimp(exp), &RQF_OST_SYNC);
583 if (req == NULL)
584 return -ENOMEM;
585
586 osc_set_capa_size(req, &RMF_CAPA1, oinfo->oi_capa);
587 rc = ptlrpc_request_pack(req, LUSTRE_OST_VERSION, OST_SYNC);
588 if (rc) {
589 ptlrpc_request_free(req);
590 return rc;
591 }
592
593 /* overload the size and blocks fields in the oa with start/end */
594 body = req_capsule_client_get(&req->rq_pill, &RMF_OST_BODY);
595 LASSERT(body);
596 lustre_set_wire_obdo(&req->rq_import->imp_connect_data, &body->oa,
597 oinfo->oi_oa);
598 osc_pack_capa(req, body, oinfo->oi_capa);
599
600 ptlrpc_request_set_replen(req);
601 req->rq_interpret_reply = osc_sync_interpret;
602
603 CLASSERT(sizeof(*fa) <= sizeof(req->rq_async_args));
604 fa = ptlrpc_req_async_args(req);
605 fa->fa_oi = oinfo;
606 fa->fa_upcall = upcall;
607 fa->fa_cookie = cookie;
608
609 if (rqset == PTLRPCD_SET)
610 ptlrpcd_add_req(req, PDL_POLICY_ROUND, -1);
611 else
612 ptlrpc_set_add_req(rqset, req);
613
614 return 0;
615 }
616
617 static int osc_sync(const struct lu_env *env, struct obd_export *exp,
618 struct obd_info *oinfo, obd_size start, obd_size end,
619 struct ptlrpc_request_set *set)
620 {
621 if (!oinfo->oi_oa) {
622 CDEBUG(D_INFO, "oa NULL\n");
623 return -EINVAL;
624 }
625
626 oinfo->oi_oa->o_size = start;
627 oinfo->oi_oa->o_blocks = end;
628 oinfo->oi_oa->o_valid |= (OBD_MD_FLSIZE | OBD_MD_FLBLOCKS);
629
630 return osc_sync_base(exp, oinfo, oinfo->oi_cb_up, oinfo, set);
631 }
632
633 /* Find and cancel locally locks matched by @mode in the resource found by
634 * @objid. Found locks are added into @cancel list. Returns the amount of
635 * locks added to @cancels list. */
636 static int osc_resource_get_unused(struct obd_export *exp, struct obdo *oa,
637 struct list_head *cancels,
638 ldlm_mode_t mode, __u64 lock_flags)
639 {
640 struct ldlm_namespace *ns = exp->exp_obd->obd_namespace;
641 struct ldlm_res_id res_id;
642 struct ldlm_resource *res;
643 int count;
644
645 /* Return, i.e. cancel nothing, only if ELC is supported (flag in
646 * export) but disabled through procfs (flag in NS).
647 *
648 * This distinguishes from a case when ELC is not supported originally,
649 * when we still want to cancel locks in advance and just cancel them
650 * locally, without sending any RPC. */
651 if (exp_connect_cancelset(exp) && !ns_connect_cancelset(ns))
652 return 0;
653
654 ostid_build_res_name(&oa->o_oi, &res_id);
655 res = ldlm_resource_get(ns, NULL, &res_id, 0, 0);
656 if (res == NULL)
657 return 0;
658
659 LDLM_RESOURCE_ADDREF(res);
660 count = ldlm_cancel_resource_local(res, cancels, NULL, mode,
661 lock_flags, 0, NULL);
662 LDLM_RESOURCE_DELREF(res);
663 ldlm_resource_putref(res);
664 return count;
665 }
666
667 static int osc_destroy_interpret(const struct lu_env *env,
668 struct ptlrpc_request *req, void *data,
669 int rc)
670 {
671 struct client_obd *cli = &req->rq_import->imp_obd->u.cli;
672
673 atomic_dec(&cli->cl_destroy_in_flight);
674 wake_up(&cli->cl_destroy_waitq);
675 return 0;
676 }
677
678 static int osc_can_send_destroy(struct client_obd *cli)
679 {
680 if (atomic_inc_return(&cli->cl_destroy_in_flight) <=
681 cli->cl_max_rpcs_in_flight) {
682 /* The destroy request can be sent */
683 return 1;
684 }
685 if (atomic_dec_return(&cli->cl_destroy_in_flight) <
686 cli->cl_max_rpcs_in_flight) {
687 /*
688 * The counter has been modified between the two atomic
689 * operations.
690 */
691 wake_up(&cli->cl_destroy_waitq);
692 }
693 return 0;
694 }
695
696 int osc_create(const struct lu_env *env, struct obd_export *exp,
697 struct obdo *oa, struct lov_stripe_md **ea,
698 struct obd_trans_info *oti)
699 {
700 int rc = 0;
701
702 LASSERT(oa);
703 LASSERT(ea);
704 LASSERT(oa->o_valid & OBD_MD_FLGROUP);
705
706 if ((oa->o_valid & OBD_MD_FLFLAGS) &&
707 oa->o_flags == OBD_FL_RECREATE_OBJS) {
708 return osc_real_create(exp, oa, ea, oti);
709 }
710
711 if (!fid_seq_is_mdt(ostid_seq(&oa->o_oi)))
712 return osc_real_create(exp, oa, ea, oti);
713
714 /* we should not get here anymore */
715 LBUG();
716
717 return rc;
718 }
719
720 /* Destroy requests can be async always on the client, and we don't even really
721 * care about the return code since the client cannot do anything at all about
722 * a destroy failure.
723 * When the MDS is unlinking a filename, it saves the file objects into a
724 * recovery llog, and these object records are cancelled when the OST reports
725 * they were destroyed and sync'd to disk (i.e. transaction committed).
726 * If the client dies, or the OST is down when the object should be destroyed,
727 * the records are not cancelled, and when the OST reconnects to the MDS next,
728 * it will retrieve the llog unlink logs and then sends the log cancellation
729 * cookies to the MDS after committing destroy transactions. */
730 static int osc_destroy(const struct lu_env *env, struct obd_export *exp,
731 struct obdo *oa, struct lov_stripe_md *ea,
732 struct obd_trans_info *oti, struct obd_export *md_export,
733 void *capa)
734 {
735 struct client_obd *cli = &exp->exp_obd->u.cli;
736 struct ptlrpc_request *req;
737 struct ost_body *body;
738 LIST_HEAD(cancels);
739 int rc, count;
740
741 if (!oa) {
742 CDEBUG(D_INFO, "oa NULL\n");
743 return -EINVAL;
744 }
745
746 count = osc_resource_get_unused(exp, oa, &cancels, LCK_PW,
747 LDLM_FL_DISCARD_DATA);
748
749 req = ptlrpc_request_alloc(class_exp2cliimp(exp), &RQF_OST_DESTROY);
750 if (req == NULL) {
751 ldlm_lock_list_put(&cancels, l_bl_ast, count);
752 return -ENOMEM;
753 }
754
755 osc_set_capa_size(req, &RMF_CAPA1, (struct obd_capa *)capa);
756 rc = ldlm_prep_elc_req(exp, req, LUSTRE_OST_VERSION, OST_DESTROY,
757 0, &cancels, count);
758 if (rc) {
759 ptlrpc_request_free(req);
760 return rc;
761 }
762
763 req->rq_request_portal = OST_IO_PORTAL; /* bug 7198 */
764 ptlrpc_at_set_req_timeout(req);
765
766 if (oti != NULL && oa->o_valid & OBD_MD_FLCOOKIE)
767 oa->o_lcookie = *oti->oti_logcookies;
768 body = req_capsule_client_get(&req->rq_pill, &RMF_OST_BODY);
769 LASSERT(body);
770 lustre_set_wire_obdo(&req->rq_import->imp_connect_data, &body->oa, oa);
771
772 osc_pack_capa(req, body, (struct obd_capa *)capa);
773 ptlrpc_request_set_replen(req);
774
775 /* If osc_destroy is for destroying the unlink orphan,
776 * sent from MDT to OST, which should not be blocked here,
777 * because the process might be triggered by ptlrpcd, and
778 * it is not good to block ptlrpcd thread (b=16006)*/
779 if (!(oa->o_flags & OBD_FL_DELORPHAN)) {
780 req->rq_interpret_reply = osc_destroy_interpret;
781 if (!osc_can_send_destroy(cli)) {
782 struct l_wait_info lwi = LWI_INTR(LWI_ON_SIGNAL_NOOP,
783 NULL);
784
785 /*
786 * Wait until the number of on-going destroy RPCs drops
787 * under max_rpc_in_flight
788 */
789 l_wait_event_exclusive(cli->cl_destroy_waitq,
790 osc_can_send_destroy(cli), &lwi);
791 }
792 }
793
794 /* Do not wait for response */
795 ptlrpcd_add_req(req, PDL_POLICY_ROUND, -1);
796 return 0;
797 }
798
799 static void osc_announce_cached(struct client_obd *cli, struct obdo *oa,
800 long writing_bytes)
801 {
802 obd_flag bits = OBD_MD_FLBLOCKS|OBD_MD_FLGRANT;
803
804 LASSERT(!(oa->o_valid & bits));
805
806 oa->o_valid |= bits;
807 client_obd_list_lock(&cli->cl_loi_list_lock);
808 oa->o_dirty = cli->cl_dirty;
809 if (unlikely(cli->cl_dirty - cli->cl_dirty_transit >
810 cli->cl_dirty_max)) {
811 CERROR("dirty %lu - %lu > dirty_max %lu\n",
812 cli->cl_dirty, cli->cl_dirty_transit, cli->cl_dirty_max);
813 oa->o_undirty = 0;
814 } else if (unlikely(atomic_read(&obd_dirty_pages) -
815 atomic_read(&obd_dirty_transit_pages) >
816 (long)(obd_max_dirty_pages + 1))) {
817 /* The atomic_read() allowing the atomic_inc() are
818 * not covered by a lock thus they may safely race and trip
819 * this CERROR() unless we add in a small fudge factor (+1). */
820 CERROR("dirty %d - %d > system dirty_max %d\n",
821 atomic_read(&obd_dirty_pages),
822 atomic_read(&obd_dirty_transit_pages),
823 obd_max_dirty_pages);
824 oa->o_undirty = 0;
825 } else if (unlikely(cli->cl_dirty_max - cli->cl_dirty > 0x7fffffff)) {
826 CERROR("dirty %lu - dirty_max %lu too big???\n",
827 cli->cl_dirty, cli->cl_dirty_max);
828 oa->o_undirty = 0;
829 } else {
830 long max_in_flight = (cli->cl_max_pages_per_rpc <<
831 PAGE_CACHE_SHIFT)*
832 (cli->cl_max_rpcs_in_flight + 1);
833 oa->o_undirty = max(cli->cl_dirty_max, max_in_flight);
834 }
835 oa->o_grant = cli->cl_avail_grant + cli->cl_reserved_grant;
836 oa->o_dropped = cli->cl_lost_grant;
837 cli->cl_lost_grant = 0;
838 client_obd_list_unlock(&cli->cl_loi_list_lock);
839 CDEBUG(D_CACHE,"dirty: %llu undirty: %u dropped %u grant: %llu\n",
840 oa->o_dirty, oa->o_undirty, oa->o_dropped, oa->o_grant);
841
842 }
843
844 void osc_update_next_shrink(struct client_obd *cli)
845 {
846 cli->cl_next_shrink_grant =
847 cfs_time_shift(cli->cl_grant_shrink_interval);
848 CDEBUG(D_CACHE, "next time %ld to shrink grant \n",
849 cli->cl_next_shrink_grant);
850 }
851
852 static void __osc_update_grant(struct client_obd *cli, obd_size grant)
853 {
854 client_obd_list_lock(&cli->cl_loi_list_lock);
855 cli->cl_avail_grant += grant;
856 client_obd_list_unlock(&cli->cl_loi_list_lock);
857 }
858
859 static void osc_update_grant(struct client_obd *cli, struct ost_body *body)
860 {
861 if (body->oa.o_valid & OBD_MD_FLGRANT) {
862 CDEBUG(D_CACHE, "got %llu extra grant\n", body->oa.o_grant);
863 __osc_update_grant(cli, body->oa.o_grant);
864 }
865 }
866
867 static int osc_set_info_async(const struct lu_env *env, struct obd_export *exp,
868 obd_count keylen, void *key, obd_count vallen,
869 void *val, struct ptlrpc_request_set *set);
870
871 static int osc_shrink_grant_interpret(const struct lu_env *env,
872 struct ptlrpc_request *req,
873 void *aa, int rc)
874 {
875 struct client_obd *cli = &req->rq_import->imp_obd->u.cli;
876 struct obdo *oa = ((struct osc_grant_args *)aa)->aa_oa;
877 struct ost_body *body;
878
879 if (rc != 0) {
880 __osc_update_grant(cli, oa->o_grant);
881 GOTO(out, rc);
882 }
883
884 body = req_capsule_server_get(&req->rq_pill, &RMF_OST_BODY);
885 LASSERT(body);
886 osc_update_grant(cli, body);
887 out:
888 OBDO_FREE(oa);
889 return rc;
890 }
891
892 static void osc_shrink_grant_local(struct client_obd *cli, struct obdo *oa)
893 {
894 client_obd_list_lock(&cli->cl_loi_list_lock);
895 oa->o_grant = cli->cl_avail_grant / 4;
896 cli->cl_avail_grant -= oa->o_grant;
897 client_obd_list_unlock(&cli->cl_loi_list_lock);
898 if (!(oa->o_valid & OBD_MD_FLFLAGS)) {
899 oa->o_valid |= OBD_MD_FLFLAGS;
900 oa->o_flags = 0;
901 }
902 oa->o_flags |= OBD_FL_SHRINK_GRANT;
903 osc_update_next_shrink(cli);
904 }
905
906 /* Shrink the current grant, either from some large amount to enough for a
907 * full set of in-flight RPCs, or if we have already shrunk to that limit
908 * then to enough for a single RPC. This avoids keeping more grant than
909 * needed, and avoids shrinking the grant piecemeal. */
910 static int osc_shrink_grant(struct client_obd *cli)
911 {
912 __u64 target_bytes = (cli->cl_max_rpcs_in_flight + 1) *
913 (cli->cl_max_pages_per_rpc << PAGE_CACHE_SHIFT);
914
915 client_obd_list_lock(&cli->cl_loi_list_lock);
916 if (cli->cl_avail_grant <= target_bytes)
917 target_bytes = cli->cl_max_pages_per_rpc << PAGE_CACHE_SHIFT;
918 client_obd_list_unlock(&cli->cl_loi_list_lock);
919
920 return osc_shrink_grant_to_target(cli, target_bytes);
921 }
922
923 int osc_shrink_grant_to_target(struct client_obd *cli, __u64 target_bytes)
924 {
925 int rc = 0;
926 struct ost_body *body;
927
928 client_obd_list_lock(&cli->cl_loi_list_lock);
929 /* Don't shrink if we are already above or below the desired limit
930 * We don't want to shrink below a single RPC, as that will negatively
931 * impact block allocation and long-term performance. */
932 if (target_bytes < cli->cl_max_pages_per_rpc << PAGE_CACHE_SHIFT)
933 target_bytes = cli->cl_max_pages_per_rpc << PAGE_CACHE_SHIFT;
934
935 if (target_bytes >= cli->cl_avail_grant) {
936 client_obd_list_unlock(&cli->cl_loi_list_lock);
937 return 0;
938 }
939 client_obd_list_unlock(&cli->cl_loi_list_lock);
940
941 OBD_ALLOC_PTR(body);
942 if (!body)
943 return -ENOMEM;
944
945 osc_announce_cached(cli, &body->oa, 0);
946
947 client_obd_list_lock(&cli->cl_loi_list_lock);
948 body->oa.o_grant = cli->cl_avail_grant - target_bytes;
949 cli->cl_avail_grant = target_bytes;
950 client_obd_list_unlock(&cli->cl_loi_list_lock);
951 if (!(body->oa.o_valid & OBD_MD_FLFLAGS)) {
952 body->oa.o_valid |= OBD_MD_FLFLAGS;
953 body->oa.o_flags = 0;
954 }
955 body->oa.o_flags |= OBD_FL_SHRINK_GRANT;
956 osc_update_next_shrink(cli);
957
958 rc = osc_set_info_async(NULL, cli->cl_import->imp_obd->obd_self_export,
959 sizeof(KEY_GRANT_SHRINK), KEY_GRANT_SHRINK,
960 sizeof(*body), body, NULL);
961 if (rc != 0)
962 __osc_update_grant(cli, body->oa.o_grant);
963 OBD_FREE_PTR(body);
964 return rc;
965 }
966
967 static int osc_should_shrink_grant(struct client_obd *client)
968 {
969 unsigned long time = cfs_time_current();
970 unsigned long next_shrink = client->cl_next_shrink_grant;
971
972 if ((client->cl_import->imp_connect_data.ocd_connect_flags &
973 OBD_CONNECT_GRANT_SHRINK) == 0)
974 return 0;
975
976 if (cfs_time_aftereq(time, next_shrink - 5 * CFS_TICK)) {
977 /* Get the current RPC size directly, instead of going via:
978 * cli_brw_size(obd->u.cli.cl_import->imp_obd->obd_self_export)
979 * Keep comment here so that it can be found by searching. */
980 int brw_size = client->cl_max_pages_per_rpc << PAGE_CACHE_SHIFT;
981
982 if (client->cl_import->imp_state == LUSTRE_IMP_FULL &&
983 client->cl_avail_grant > brw_size)
984 return 1;
985 else
986 osc_update_next_shrink(client);
987 }
988 return 0;
989 }
990
991 static int osc_grant_shrink_grant_cb(struct timeout_item *item, void *data)
992 {
993 struct client_obd *client;
994
995 list_for_each_entry(client, &item->ti_obd_list,
996 cl_grant_shrink_list) {
997 if (osc_should_shrink_grant(client))
998 osc_shrink_grant(client);
999 }
1000 return 0;
1001 }
1002
1003 static int osc_add_shrink_grant(struct client_obd *client)
1004 {
1005 int rc;
1006
1007 rc = ptlrpc_add_timeout_client(client->cl_grant_shrink_interval,
1008 TIMEOUT_GRANT,
1009 osc_grant_shrink_grant_cb, NULL,
1010 &client->cl_grant_shrink_list);
1011 if (rc) {
1012 CERROR("add grant client %s error %d\n",
1013 client->cl_import->imp_obd->obd_name, rc);
1014 return rc;
1015 }
1016 CDEBUG(D_CACHE, "add grant client %s \n",
1017 client->cl_import->imp_obd->obd_name);
1018 osc_update_next_shrink(client);
1019 return 0;
1020 }
1021
1022 static int osc_del_shrink_grant(struct client_obd *client)
1023 {
1024 return ptlrpc_del_timeout_client(&client->cl_grant_shrink_list,
1025 TIMEOUT_GRANT);
1026 }
1027
1028 static void osc_init_grant(struct client_obd *cli, struct obd_connect_data *ocd)
1029 {
1030 /*
1031 * ocd_grant is the total grant amount we're expect to hold: if we've
1032 * been evicted, it's the new avail_grant amount, cl_dirty will drop
1033 * to 0 as inflight RPCs fail out; otherwise, it's avail_grant + dirty.
1034 *
1035 * race is tolerable here: if we're evicted, but imp_state already
1036 * left EVICTED state, then cl_dirty must be 0 already.
1037 */
1038 client_obd_list_lock(&cli->cl_loi_list_lock);
1039 if (cli->cl_import->imp_state == LUSTRE_IMP_EVICTED)
1040 cli->cl_avail_grant = ocd->ocd_grant;
1041 else
1042 cli->cl_avail_grant = ocd->ocd_grant - cli->cl_dirty;
1043
1044 if (cli->cl_avail_grant < 0) {
1045 CWARN("%s: available grant < 0: avail/ocd/dirty %ld/%u/%ld\n",
1046 cli->cl_import->imp_obd->obd_name, cli->cl_avail_grant,
1047 ocd->ocd_grant, cli->cl_dirty);
1048 /* workaround for servers which do not have the patch from
1049 * LU-2679 */
1050 cli->cl_avail_grant = ocd->ocd_grant;
1051 }
1052
1053 /* determine the appropriate chunk size used by osc_extent. */
1054 cli->cl_chunkbits = max_t(int, PAGE_CACHE_SHIFT, ocd->ocd_blocksize);
1055 client_obd_list_unlock(&cli->cl_loi_list_lock);
1056
1057 CDEBUG(D_CACHE, "%s, setting cl_avail_grant: %ld cl_lost_grant: %ld."
1058 "chunk bits: %d.\n", cli->cl_import->imp_obd->obd_name,
1059 cli->cl_avail_grant, cli->cl_lost_grant, cli->cl_chunkbits);
1060
1061 if (ocd->ocd_connect_flags & OBD_CONNECT_GRANT_SHRINK &&
1062 list_empty(&cli->cl_grant_shrink_list))
1063 osc_add_shrink_grant(cli);
1064 }
1065
1066 /* We assume that the reason this OSC got a short read is because it read
1067 * beyond the end of a stripe file; i.e. lustre is reading a sparse file
1068 * via the LOV, and it _knows_ it's reading inside the file, it's just that
1069 * this stripe never got written at or beyond this stripe offset yet. */
1070 static void handle_short_read(int nob_read, obd_count page_count,
1071 struct brw_page **pga)
1072 {
1073 char *ptr;
1074 int i = 0;
1075
1076 /* skip bytes read OK */
1077 while (nob_read > 0) {
1078 LASSERT (page_count > 0);
1079
1080 if (pga[i]->count > nob_read) {
1081 /* EOF inside this page */
1082 ptr = kmap(pga[i]->pg) +
1083 (pga[i]->off & ~CFS_PAGE_MASK);
1084 memset(ptr + nob_read, 0, pga[i]->count - nob_read);
1085 kunmap(pga[i]->pg);
1086 page_count--;
1087 i++;
1088 break;
1089 }
1090
1091 nob_read -= pga[i]->count;
1092 page_count--;
1093 i++;
1094 }
1095
1096 /* zero remaining pages */
1097 while (page_count-- > 0) {
1098 ptr = kmap(pga[i]->pg) + (pga[i]->off & ~CFS_PAGE_MASK);
1099 memset(ptr, 0, pga[i]->count);
1100 kunmap(pga[i]->pg);
1101 i++;
1102 }
1103 }
1104
1105 static int check_write_rcs(struct ptlrpc_request *req,
1106 int requested_nob, int niocount,
1107 obd_count page_count, struct brw_page **pga)
1108 {
1109 int i;
1110 __u32 *remote_rcs;
1111
1112 remote_rcs = req_capsule_server_sized_get(&req->rq_pill, &RMF_RCS,
1113 sizeof(*remote_rcs) *
1114 niocount);
1115 if (remote_rcs == NULL) {
1116 CDEBUG(D_INFO, "Missing/short RC vector on BRW_WRITE reply\n");
1117 return(-EPROTO);
1118 }
1119
1120 /* return error if any niobuf was in error */
1121 for (i = 0; i < niocount; i++) {
1122 if ((int)remote_rcs[i] < 0)
1123 return(remote_rcs[i]);
1124
1125 if (remote_rcs[i] != 0) {
1126 CDEBUG(D_INFO, "rc[%d] invalid (%d) req %p\n",
1127 i, remote_rcs[i], req);
1128 return(-EPROTO);
1129 }
1130 }
1131
1132 if (req->rq_bulk->bd_nob_transferred != requested_nob) {
1133 CERROR("Unexpected # bytes transferred: %d (requested %d)\n",
1134 req->rq_bulk->bd_nob_transferred, requested_nob);
1135 return(-EPROTO);
1136 }
1137
1138 return (0);
1139 }
1140
1141 static inline int can_merge_pages(struct brw_page *p1, struct brw_page *p2)
1142 {
1143 if (p1->flag != p2->flag) {
1144 unsigned mask = ~(OBD_BRW_FROM_GRANT| OBD_BRW_NOCACHE|
1145 OBD_BRW_SYNC|OBD_BRW_ASYNC|OBD_BRW_NOQUOTA);
1146
1147 /* warn if we try to combine flags that we don't know to be
1148 * safe to combine */
1149 if (unlikely((p1->flag & mask) != (p2->flag & mask))) {
1150 CWARN("Saw flags 0x%x and 0x%x in the same brw, please "
1151 "report this at http://bugs.whamcloud.com/\n",
1152 p1->flag, p2->flag);
1153 }
1154 return 0;
1155 }
1156
1157 return (p1->off + p1->count == p2->off);
1158 }
1159
1160 static obd_count osc_checksum_bulk(int nob, obd_count pg_count,
1161 struct brw_page **pga, int opc,
1162 cksum_type_t cksum_type)
1163 {
1164 __u32 cksum;
1165 int i = 0;
1166 struct cfs_crypto_hash_desc *hdesc;
1167 unsigned int bufsize;
1168 int err;
1169 unsigned char cfs_alg = cksum_obd2cfs(cksum_type);
1170
1171 LASSERT(pg_count > 0);
1172
1173 hdesc = cfs_crypto_hash_init(cfs_alg, NULL, 0);
1174 if (IS_ERR(hdesc)) {
1175 CERROR("Unable to initialize checksum hash %s\n",
1176 cfs_crypto_hash_name(cfs_alg));
1177 return PTR_ERR(hdesc);
1178 }
1179
1180 while (nob > 0 && pg_count > 0) {
1181 int count = pga[i]->count > nob ? nob : pga[i]->count;
1182
1183 /* corrupt the data before we compute the checksum, to
1184 * simulate an OST->client data error */
1185 if (i == 0 && opc == OST_READ &&
1186 OBD_FAIL_CHECK(OBD_FAIL_OSC_CHECKSUM_RECEIVE)) {
1187 unsigned char *ptr = kmap(pga[i]->pg);
1188 int off = pga[i]->off & ~CFS_PAGE_MASK;
1189 memcpy(ptr + off, "bad1", min(4, nob));
1190 kunmap(pga[i]->pg);
1191 }
1192 cfs_crypto_hash_update_page(hdesc, pga[i]->pg,
1193 pga[i]->off & ~CFS_PAGE_MASK,
1194 count);
1195 CDEBUG(D_PAGE,
1196 "page %p map %p index %lu flags %lx count %u priv %0lx: off %d\n",
1197 pga[i]->pg, pga[i]->pg->mapping, pga[i]->pg->index,
1198 (long)pga[i]->pg->flags, page_count(pga[i]->pg),
1199 page_private(pga[i]->pg),
1200 (int)(pga[i]->off & ~CFS_PAGE_MASK));
1201
1202 nob -= pga[i]->count;
1203 pg_count--;
1204 i++;
1205 }
1206
1207 bufsize = 4;
1208 err = cfs_crypto_hash_final(hdesc, (unsigned char *)&cksum, &bufsize);
1209
1210 if (err)
1211 cfs_crypto_hash_final(hdesc, NULL, NULL);
1212
1213 /* For sending we only compute the wrong checksum instead
1214 * of corrupting the data so it is still correct on a redo */
1215 if (opc == OST_WRITE && OBD_FAIL_CHECK(OBD_FAIL_OSC_CHECKSUM_SEND))
1216 cksum++;
1217
1218 return cksum;
1219 }
1220
1221 static int osc_brw_prep_request(int cmd, struct client_obd *cli,struct obdo *oa,
1222 struct lov_stripe_md *lsm, obd_count page_count,
1223 struct brw_page **pga,
1224 struct ptlrpc_request **reqp,
1225 struct obd_capa *ocapa, int reserve,
1226 int resend)
1227 {
1228 struct ptlrpc_request *req;
1229 struct ptlrpc_bulk_desc *desc;
1230 struct ost_body *body;
1231 struct obd_ioobj *ioobj;
1232 struct niobuf_remote *niobuf;
1233 int niocount, i, requested_nob, opc, rc;
1234 struct osc_brw_async_args *aa;
1235 struct req_capsule *pill;
1236 struct brw_page *pg_prev;
1237
1238 if (OBD_FAIL_CHECK(OBD_FAIL_OSC_BRW_PREP_REQ))
1239 return -ENOMEM; /* Recoverable */
1240 if (OBD_FAIL_CHECK(OBD_FAIL_OSC_BRW_PREP_REQ2))
1241 return -EINVAL; /* Fatal */
1242
1243 if ((cmd & OBD_BRW_WRITE) != 0) {
1244 opc = OST_WRITE;
1245 req = ptlrpc_request_alloc_pool(cli->cl_import,
1246 cli->cl_import->imp_rq_pool,
1247 &RQF_OST_BRW_WRITE);
1248 } else {
1249 opc = OST_READ;
1250 req = ptlrpc_request_alloc(cli->cl_import, &RQF_OST_BRW_READ);
1251 }
1252 if (req == NULL)
1253 return -ENOMEM;
1254
1255 for (niocount = i = 1; i < page_count; i++) {
1256 if (!can_merge_pages(pga[i - 1], pga[i]))
1257 niocount++;
1258 }
1259
1260 pill = &req->rq_pill;
1261 req_capsule_set_size(pill, &RMF_OBD_IOOBJ, RCL_CLIENT,
1262 sizeof(*ioobj));
1263 req_capsule_set_size(pill, &RMF_NIOBUF_REMOTE, RCL_CLIENT,
1264 niocount * sizeof(*niobuf));
1265 osc_set_capa_size(req, &RMF_CAPA1, ocapa);
1266
1267 rc = ptlrpc_request_pack(req, LUSTRE_OST_VERSION, opc);
1268 if (rc) {
1269 ptlrpc_request_free(req);
1270 return rc;
1271 }
1272 req->rq_request_portal = OST_IO_PORTAL; /* bug 7198 */
1273 ptlrpc_at_set_req_timeout(req);
1274 /* ask ptlrpc not to resend on EINPROGRESS since BRWs have their own
1275 * retry logic */
1276 req->rq_no_retry_einprogress = 1;
1277
1278 desc = ptlrpc_prep_bulk_imp(req, page_count,
1279 cli->cl_import->imp_connect_data.ocd_brw_size >> LNET_MTU_BITS,
1280 opc == OST_WRITE ? BULK_GET_SOURCE : BULK_PUT_SINK,
1281 OST_BULK_PORTAL);
1282
1283 if (desc == NULL)
1284 GOTO(out, rc = -ENOMEM);
1285 /* NB request now owns desc and will free it when it gets freed */
1286
1287 body = req_capsule_client_get(pill, &RMF_OST_BODY);
1288 ioobj = req_capsule_client_get(pill, &RMF_OBD_IOOBJ);
1289 niobuf = req_capsule_client_get(pill, &RMF_NIOBUF_REMOTE);
1290 LASSERT(body != NULL && ioobj != NULL && niobuf != NULL);
1291
1292 lustre_set_wire_obdo(&req->rq_import->imp_connect_data, &body->oa, oa);
1293
1294 obdo_to_ioobj(oa, ioobj);
1295 ioobj->ioo_bufcnt = niocount;
1296 /* The high bits of ioo_max_brw tells server _maximum_ number of bulks
1297 * that might be send for this request. The actual number is decided
1298 * when the RPC is finally sent in ptlrpc_register_bulk(). It sends
1299 * "max - 1" for old client compatibility sending "0", and also so the
1300 * the actual maximum is a power-of-two number, not one less. LU-1431 */
1301 ioobj_max_brw_set(ioobj, desc->bd_md_max_brw);
1302 osc_pack_capa(req, body, ocapa);
1303 LASSERT(page_count > 0);
1304 pg_prev = pga[0];
1305 for (requested_nob = i = 0; i < page_count; i++, niobuf++) {
1306 struct brw_page *pg = pga[i];
1307 int poff = pg->off & ~CFS_PAGE_MASK;
1308
1309 LASSERT(pg->count > 0);
1310 /* make sure there is no gap in the middle of page array */
1311 LASSERTF(page_count == 1 ||
1312 (ergo(i == 0, poff + pg->count == PAGE_CACHE_SIZE) &&
1313 ergo(i > 0 && i < page_count - 1,
1314 poff == 0 && pg->count == PAGE_CACHE_SIZE) &&
1315 ergo(i == page_count - 1, poff == 0)),
1316 "i: %d/%d pg: %p off: %llu, count: %u\n",
1317 i, page_count, pg, pg->off, pg->count);
1318 LASSERTF(i == 0 || pg->off > pg_prev->off,
1319 "i %d p_c %u pg %p [pri %lu ind %lu] off %llu"
1320 " prev_pg %p [pri %lu ind %lu] off %llu\n",
1321 i, page_count,
1322 pg->pg, page_private(pg->pg), pg->pg->index, pg->off,
1323 pg_prev->pg, page_private(pg_prev->pg),
1324 pg_prev->pg->index, pg_prev->off);
1325 LASSERT((pga[0]->flag & OBD_BRW_SRVLOCK) ==
1326 (pg->flag & OBD_BRW_SRVLOCK));
1327
1328 ptlrpc_prep_bulk_page_pin(desc, pg->pg, poff, pg->count);
1329 requested_nob += pg->count;
1330
1331 if (i > 0 && can_merge_pages(pg_prev, pg)) {
1332 niobuf--;
1333 niobuf->len += pg->count;
1334 } else {
1335 niobuf->offset = pg->off;
1336 niobuf->len = pg->count;
1337 niobuf->flags = pg->flag;
1338 }
1339 pg_prev = pg;
1340 }
1341
1342 LASSERTF((void *)(niobuf - niocount) ==
1343 req_capsule_client_get(&req->rq_pill, &RMF_NIOBUF_REMOTE),
1344 "want %p - real %p\n", req_capsule_client_get(&req->rq_pill,
1345 &RMF_NIOBUF_REMOTE), (void *)(niobuf - niocount));
1346
1347 osc_announce_cached(cli, &body->oa, opc == OST_WRITE ? requested_nob:0);
1348 if (resend) {
1349 if ((body->oa.o_valid & OBD_MD_FLFLAGS) == 0) {
1350 body->oa.o_valid |= OBD_MD_FLFLAGS;
1351 body->oa.o_flags = 0;
1352 }
1353 body->oa.o_flags |= OBD_FL_RECOV_RESEND;
1354 }
1355
1356 if (osc_should_shrink_grant(cli))
1357 osc_shrink_grant_local(cli, &body->oa);
1358
1359 /* size[REQ_REC_OFF] still sizeof (*body) */
1360 if (opc == OST_WRITE) {
1361 if (cli->cl_checksum &&
1362 !sptlrpc_flavor_has_bulk(&req->rq_flvr)) {
1363 /* store cl_cksum_type in a local variable since
1364 * it can be changed via lprocfs */
1365 cksum_type_t cksum_type = cli->cl_cksum_type;
1366
1367 if ((body->oa.o_valid & OBD_MD_FLFLAGS) == 0) {
1368 oa->o_flags &= OBD_FL_LOCAL_MASK;
1369 body->oa.o_flags = 0;
1370 }
1371 body->oa.o_flags |= cksum_type_pack(cksum_type);
1372 body->oa.o_valid |= OBD_MD_FLCKSUM | OBD_MD_FLFLAGS;
1373 body->oa.o_cksum = osc_checksum_bulk(requested_nob,
1374 page_count, pga,
1375 OST_WRITE,
1376 cksum_type);
1377 CDEBUG(D_PAGE, "checksum at write origin: %x\n",
1378 body->oa.o_cksum);
1379 /* save this in 'oa', too, for later checking */
1380 oa->o_valid |= OBD_MD_FLCKSUM | OBD_MD_FLFLAGS;
1381 oa->o_flags |= cksum_type_pack(cksum_type);
1382 } else {
1383 /* clear out the checksum flag, in case this is a
1384 * resend but cl_checksum is no longer set. b=11238 */
1385 oa->o_valid &= ~OBD_MD_FLCKSUM;
1386 }
1387 oa->o_cksum = body->oa.o_cksum;
1388 /* 1 RC per niobuf */
1389 req_capsule_set_size(pill, &RMF_RCS, RCL_SERVER,
1390 sizeof(__u32) * niocount);
1391 } else {
1392 if (cli->cl_checksum &&
1393 !sptlrpc_flavor_has_bulk(&req->rq_flvr)) {
1394 if ((body->oa.o_valid & OBD_MD_FLFLAGS) == 0)
1395 body->oa.o_flags = 0;
1396 body->oa.o_flags |= cksum_type_pack(cli->cl_cksum_type);
1397 body->oa.o_valid |= OBD_MD_FLCKSUM | OBD_MD_FLFLAGS;
1398 }
1399 }
1400 ptlrpc_request_set_replen(req);
1401
1402 CLASSERT(sizeof(*aa) <= sizeof(req->rq_async_args));
1403 aa = ptlrpc_req_async_args(req);
1404 aa->aa_oa = oa;
1405 aa->aa_requested_nob = requested_nob;
1406 aa->aa_nio_count = niocount;
1407 aa->aa_page_count = page_count;
1408 aa->aa_resends = 0;
1409 aa->aa_ppga = pga;
1410 aa->aa_cli = cli;
1411 INIT_LIST_HEAD(&aa->aa_oaps);
1412 if (ocapa && reserve)
1413 aa->aa_ocapa = capa_get(ocapa);
1414
1415 *reqp = req;
1416 return 0;
1417
1418 out:
1419 ptlrpc_req_finished(req);
1420 return rc;
1421 }
1422
1423 static int check_write_checksum(struct obdo *oa, const lnet_process_id_t *peer,
1424 __u32 client_cksum, __u32 server_cksum, int nob,
1425 obd_count page_count, struct brw_page **pga,
1426 cksum_type_t client_cksum_type)
1427 {
1428 __u32 new_cksum;
1429 char *msg;
1430 cksum_type_t cksum_type;
1431
1432 if (server_cksum == client_cksum) {
1433 CDEBUG(D_PAGE, "checksum %x confirmed\n", client_cksum);
1434 return 0;
1435 }
1436
1437 cksum_type = cksum_type_unpack(oa->o_valid & OBD_MD_FLFLAGS ?
1438 oa->o_flags : 0);
1439 new_cksum = osc_checksum_bulk(nob, page_count, pga, OST_WRITE,
1440 cksum_type);
1441
1442 if (cksum_type != client_cksum_type)
1443 msg = "the server did not use the checksum type specified in "
1444 "the original request - likely a protocol problem";
1445 else if (new_cksum == server_cksum)
1446 msg = "changed on the client after we checksummed it - "
1447 "likely false positive due to mmap IO (bug 11742)";
1448 else if (new_cksum == client_cksum)
1449 msg = "changed in transit before arrival at OST";
1450 else
1451 msg = "changed in transit AND doesn't match the original - "
1452 "likely false positive due to mmap IO (bug 11742)";
1453
1454 LCONSOLE_ERROR_MSG(0x132, "BAD WRITE CHECKSUM: %s: from %s inode "DFID
1455 " object "DOSTID" extent [%llu-%llu]\n",
1456 msg, libcfs_nid2str(peer->nid),
1457 oa->o_valid & OBD_MD_FLFID ? oa->o_parent_seq : (__u64)0,
1458 oa->o_valid & OBD_MD_FLFID ? oa->o_parent_oid : 0,
1459 oa->o_valid & OBD_MD_FLFID ? oa->o_parent_ver : 0,
1460 POSTID(&oa->o_oi), pga[0]->off,
1461 pga[page_count-1]->off + pga[page_count-1]->count - 1);
1462 CERROR("original client csum %x (type %x), server csum %x (type %x), "
1463 "client csum now %x\n", client_cksum, client_cksum_type,
1464 server_cksum, cksum_type, new_cksum);
1465 return 1;
1466 }
1467
1468 /* Note rc enters this function as number of bytes transferred */
1469 static int osc_brw_fini_request(struct ptlrpc_request *req, int rc)
1470 {
1471 struct osc_brw_async_args *aa = (void *)&req->rq_async_args;
1472 const lnet_process_id_t *peer =
1473 &req->rq_import->imp_connection->c_peer;
1474 struct client_obd *cli = aa->aa_cli;
1475 struct ost_body *body;
1476 __u32 client_cksum = 0;
1477
1478 if (rc < 0 && rc != -EDQUOT) {
1479 DEBUG_REQ(D_INFO, req, "Failed request with rc = %d\n", rc);
1480 return rc;
1481 }
1482
1483 LASSERTF(req->rq_repmsg != NULL, "rc = %d\n", rc);
1484 body = req_capsule_server_get(&req->rq_pill, &RMF_OST_BODY);
1485 if (body == NULL) {
1486 DEBUG_REQ(D_INFO, req, "Can't unpack body\n");
1487 return -EPROTO;
1488 }
1489
1490 /* set/clear over quota flag for a uid/gid */
1491 if (lustre_msg_get_opc(req->rq_reqmsg) == OST_WRITE &&
1492 body->oa.o_valid & (OBD_MD_FLUSRQUOTA | OBD_MD_FLGRPQUOTA)) {
1493 unsigned int qid[MAXQUOTAS] = { body->oa.o_uid, body->oa.o_gid };
1494
1495 CDEBUG(D_QUOTA, "setdq for [%u %u] with valid %#llx, flags %x\n",
1496 body->oa.o_uid, body->oa.o_gid, body->oa.o_valid,
1497 body->oa.o_flags);
1498 osc_quota_setdq(cli, qid, body->oa.o_valid, body->oa.o_flags);
1499 }
1500
1501 osc_update_grant(cli, body);
1502
1503 if (rc < 0)
1504 return rc;
1505
1506 if (aa->aa_oa->o_valid & OBD_MD_FLCKSUM)
1507 client_cksum = aa->aa_oa->o_cksum; /* save for later */
1508
1509 if (lustre_msg_get_opc(req->rq_reqmsg) == OST_WRITE) {
1510 if (rc > 0) {
1511 CERROR("Unexpected +ve rc %d\n", rc);
1512 return -EPROTO;
1513 }
1514 LASSERT(req->rq_bulk->bd_nob == aa->aa_requested_nob);
1515
1516 if (sptlrpc_cli_unwrap_bulk_write(req, req->rq_bulk))
1517 return -EAGAIN;
1518
1519 if ((aa->aa_oa->o_valid & OBD_MD_FLCKSUM) && client_cksum &&
1520 check_write_checksum(&body->oa, peer, client_cksum,
1521 body->oa.o_cksum, aa->aa_requested_nob,
1522 aa->aa_page_count, aa->aa_ppga,
1523 cksum_type_unpack(aa->aa_oa->o_flags)))
1524 return -EAGAIN;
1525
1526 rc = check_write_rcs(req, aa->aa_requested_nob,aa->aa_nio_count,
1527 aa->aa_page_count, aa->aa_ppga);
1528 GOTO(out, rc);
1529 }
1530
1531 /* The rest of this function executes only for OST_READs */
1532
1533 /* if unwrap_bulk failed, return -EAGAIN to retry */
1534 rc = sptlrpc_cli_unwrap_bulk_read(req, req->rq_bulk, rc);
1535 if (rc < 0)
1536 GOTO(out, rc = -EAGAIN);
1537
1538 if (rc > aa->aa_requested_nob) {
1539 CERROR("Unexpected rc %d (%d requested)\n", rc,
1540 aa->aa_requested_nob);
1541 return -EPROTO;
1542 }
1543
1544 if (rc != req->rq_bulk->bd_nob_transferred) {
1545 CERROR ("Unexpected rc %d (%d transferred)\n",
1546 rc, req->rq_bulk->bd_nob_transferred);
1547 return (-EPROTO);
1548 }
1549
1550 if (rc < aa->aa_requested_nob)
1551 handle_short_read(rc, aa->aa_page_count, aa->aa_ppga);
1552
1553 if (body->oa.o_valid & OBD_MD_FLCKSUM) {
1554 static int cksum_counter;
1555 __u32 server_cksum = body->oa.o_cksum;
1556 char *via;
1557 char *router;
1558 cksum_type_t cksum_type;
1559
1560 cksum_type = cksum_type_unpack(body->oa.o_valid &OBD_MD_FLFLAGS?
1561 body->oa.o_flags : 0);
1562 client_cksum = osc_checksum_bulk(rc, aa->aa_page_count,
1563 aa->aa_ppga, OST_READ,
1564 cksum_type);
1565
1566 if (peer->nid == req->rq_bulk->bd_sender) {
1567 via = router = "";
1568 } else {
1569 via = " via ";
1570 router = libcfs_nid2str(req->rq_bulk->bd_sender);
1571 }
1572
1573 if (server_cksum != client_cksum) {
1574 LCONSOLE_ERROR_MSG(0x133, "%s: BAD READ CHECKSUM: from "
1575 "%s%s%s inode "DFID" object "DOSTID
1576 " extent [%llu-%llu]\n",
1577 req->rq_import->imp_obd->obd_name,
1578 libcfs_nid2str(peer->nid),
1579 via, router,
1580 body->oa.o_valid & OBD_MD_FLFID ?
1581 body->oa.o_parent_seq : (__u64)0,
1582 body->oa.o_valid & OBD_MD_FLFID ?
1583 body->oa.o_parent_oid : 0,
1584 body->oa.o_valid & OBD_MD_FLFID ?
1585 body->oa.o_parent_ver : 0,
1586 POSTID(&body->oa.o_oi),
1587 aa->aa_ppga[0]->off,
1588 aa->aa_ppga[aa->aa_page_count-1]->off +
1589 aa->aa_ppga[aa->aa_page_count-1]->count -
1590 1);
1591 CERROR("client %x, server %x, cksum_type %x\n",
1592 client_cksum, server_cksum, cksum_type);
1593 cksum_counter = 0;
1594 aa->aa_oa->o_cksum = client_cksum;
1595 rc = -EAGAIN;
1596 } else {
1597 cksum_counter++;
1598 CDEBUG(D_PAGE, "checksum %x confirmed\n", client_cksum);
1599 rc = 0;
1600 }
1601 } else if (unlikely(client_cksum)) {
1602 static int cksum_missed;
1603
1604 cksum_missed++;
1605 if ((cksum_missed & (-cksum_missed)) == cksum_missed)
1606 CERROR("Checksum %u requested from %s but not sent\n",
1607 cksum_missed, libcfs_nid2str(peer->nid));
1608 } else {
1609 rc = 0;
1610 }
1611 out:
1612 if (rc >= 0)
1613 lustre_get_wire_obdo(&req->rq_import->imp_connect_data,
1614 aa->aa_oa, &body->oa);
1615
1616 return rc;
1617 }
1618
1619 static int osc_brw_internal(int cmd, struct obd_export *exp, struct obdo *oa,
1620 struct lov_stripe_md *lsm,
1621 obd_count page_count, struct brw_page **pga,
1622 struct obd_capa *ocapa)
1623 {
1624 struct ptlrpc_request *req;
1625 int rc;
1626 wait_queue_head_t waitq;
1627 int generation, resends = 0;
1628 struct l_wait_info lwi;
1629
1630 init_waitqueue_head(&waitq);
1631 generation = exp->exp_obd->u.cli.cl_import->imp_generation;
1632
1633 restart_bulk:
1634 rc = osc_brw_prep_request(cmd, &exp->exp_obd->u.cli, oa, lsm,
1635 page_count, pga, &req, ocapa, 0, resends);
1636 if (rc != 0)
1637 return (rc);
1638
1639 if (resends) {
1640 req->rq_generation_set = 1;
1641 req->rq_import_generation = generation;
1642 req->rq_sent = get_seconds() + resends;
1643 }
1644
1645 rc = ptlrpc_queue_wait(req);
1646
1647 if (rc == -ETIMEDOUT && req->rq_resend) {
1648 DEBUG_REQ(D_HA, req, "BULK TIMEOUT");
1649 ptlrpc_req_finished(req);
1650 goto restart_bulk;
1651 }
1652
1653 rc = osc_brw_fini_request(req, rc);
1654
1655 ptlrpc_req_finished(req);
1656 /* When server return -EINPROGRESS, client should always retry
1657 * regardless of the number of times the bulk was resent already.*/
1658 if (osc_recoverable_error(rc)) {
1659 resends++;
1660 if (rc != -EINPROGRESS &&
1661 !client_should_resend(resends, &exp->exp_obd->u.cli)) {
1662 CERROR("%s: too many resend retries for object: "
1663 ""DOSTID", rc = %d.\n", exp->exp_obd->obd_name,
1664 POSTID(&oa->o_oi), rc);
1665 goto out;
1666 }
1667 if (generation !=
1668 exp->exp_obd->u.cli.cl_import->imp_generation) {
1669 CDEBUG(D_HA, "%s: resend cross eviction for object: "
1670 ""DOSTID", rc = %d.\n", exp->exp_obd->obd_name,
1671 POSTID(&oa->o_oi), rc);
1672 goto out;
1673 }
1674
1675 lwi = LWI_TIMEOUT_INTR(cfs_time_seconds(resends), NULL, NULL,
1676 NULL);
1677 l_wait_event(waitq, 0, &lwi);
1678
1679 goto restart_bulk;
1680 }
1681 out:
1682 if (rc == -EAGAIN || rc == -EINPROGRESS)
1683 rc = -EIO;
1684 return rc;
1685 }
1686
1687 static int osc_brw_redo_request(struct ptlrpc_request *request,
1688 struct osc_brw_async_args *aa, int rc)
1689 {
1690 struct ptlrpc_request *new_req;
1691 struct osc_brw_async_args *new_aa;
1692 struct osc_async_page *oap;
1693
1694 DEBUG_REQ(rc == -EINPROGRESS ? D_RPCTRACE : D_ERROR, request,
1695 "redo for recoverable error %d", rc);
1696
1697 rc = osc_brw_prep_request(lustre_msg_get_opc(request->rq_reqmsg) ==
1698 OST_WRITE ? OBD_BRW_WRITE :OBD_BRW_READ,
1699 aa->aa_cli, aa->aa_oa,
1700 NULL /* lsm unused by osc currently */,
1701 aa->aa_page_count, aa->aa_ppga,
1702 &new_req, aa->aa_ocapa, 0, 1);
1703 if (rc)
1704 return rc;
1705
1706 list_for_each_entry(oap, &aa->aa_oaps, oap_rpc_item) {
1707 if (oap->oap_request != NULL) {
1708 LASSERTF(request == oap->oap_request,
1709 "request %p != oap_request %p\n",
1710 request, oap->oap_request);
1711 if (oap->oap_interrupted) {
1712 ptlrpc_req_finished(new_req);
1713 return -EINTR;
1714 }
1715 }
1716 }
1717 /* New request takes over pga and oaps from old request.
1718 * Note that copying a list_head doesn't work, need to move it... */
1719 aa->aa_resends++;
1720 new_req->rq_interpret_reply = request->rq_interpret_reply;
1721 new_req->rq_async_args = request->rq_async_args;
1722 /* cap resend delay to the current request timeout, this is similar to
1723 * what ptlrpc does (see after_reply()) */
1724 if (aa->aa_resends > new_req->rq_timeout)
1725 new_req->rq_sent = get_seconds() + new_req->rq_timeout;
1726 else
1727 new_req->rq_sent = get_seconds() + aa->aa_resends;
1728 new_req->rq_generation_set = 1;
1729 new_req->rq_import_generation = request->rq_import_generation;
1730
1731 new_aa = ptlrpc_req_async_args(new_req);
1732
1733 INIT_LIST_HEAD(&new_aa->aa_oaps);
1734 list_splice_init(&aa->aa_oaps, &new_aa->aa_oaps);
1735 INIT_LIST_HEAD(&new_aa->aa_exts);
1736 list_splice_init(&aa->aa_exts, &new_aa->aa_exts);
1737 new_aa->aa_resends = aa->aa_resends;
1738
1739 list_for_each_entry(oap, &new_aa->aa_oaps, oap_rpc_item) {
1740 if (oap->oap_request) {
1741 ptlrpc_req_finished(oap->oap_request);
1742 oap->oap_request = ptlrpc_request_addref(new_req);
1743 }
1744 }
1745
1746 new_aa->aa_ocapa = aa->aa_ocapa;
1747 aa->aa_ocapa = NULL;
1748
1749 /* XXX: This code will run into problem if we're going to support
1750 * to add a series of BRW RPCs into a self-defined ptlrpc_request_set
1751 * and wait for all of them to be finished. We should inherit request
1752 * set from old request. */
1753 ptlrpcd_add_req(new_req, PDL_POLICY_SAME, -1);
1754
1755 DEBUG_REQ(D_INFO, new_req, "new request");
1756 return 0;
1757 }
1758
1759 /*
1760 * ugh, we want disk allocation on the target to happen in offset order. we'll
1761 * follow sedgewicks advice and stick to the dead simple shellsort -- it'll do
1762 * fine for our small page arrays and doesn't require allocation. its an
1763 * insertion sort that swaps elements that are strides apart, shrinking the
1764 * stride down until its '1' and the array is sorted.
1765 */
1766 static void sort_brw_pages(struct brw_page **array, int num)
1767 {
1768 int stride, i, j;
1769 struct brw_page *tmp;
1770
1771 if (num == 1)
1772 return;
1773 for (stride = 1; stride < num ; stride = (stride * 3) + 1)
1774 ;
1775
1776 do {
1777 stride /= 3;
1778 for (i = stride ; i < num ; i++) {
1779 tmp = array[i];
1780 j = i;
1781 while (j >= stride && array[j - stride]->off > tmp->off) {
1782 array[j] = array[j - stride];
1783 j -= stride;
1784 }
1785 array[j] = tmp;
1786 }
1787 } while (stride > 1);
1788 }
1789
1790 static obd_count max_unfragmented_pages(struct brw_page **pg, obd_count pages)
1791 {
1792 int count = 1;
1793 int offset;
1794 int i = 0;
1795
1796 LASSERT (pages > 0);
1797 offset = pg[i]->off & ~CFS_PAGE_MASK;
1798
1799 for (;;) {
1800 pages--;
1801 if (pages == 0) /* that's all */
1802 return count;
1803
1804 if (offset + pg[i]->count < PAGE_CACHE_SIZE)
1805 return count; /* doesn't end on page boundary */
1806
1807 i++;
1808 offset = pg[i]->off & ~CFS_PAGE_MASK;
1809 if (offset != 0) /* doesn't start on page boundary */
1810 return count;
1811
1812 count++;
1813 }
1814 }
1815
1816 static struct brw_page **osc_build_ppga(struct brw_page *pga, obd_count count)
1817 {
1818 struct brw_page **ppga;
1819 int i;
1820
1821 OBD_ALLOC(ppga, sizeof(*ppga) * count);
1822 if (ppga == NULL)
1823 return NULL;
1824
1825 for (i = 0; i < count; i++)
1826 ppga[i] = pga + i;
1827 return ppga;
1828 }
1829
1830 static void osc_release_ppga(struct brw_page **ppga, obd_count count)
1831 {
1832 LASSERT(ppga != NULL);
1833 OBD_FREE(ppga, sizeof(*ppga) * count);
1834 }
1835
1836 static int osc_brw(int cmd, struct obd_export *exp, struct obd_info *oinfo,
1837 obd_count page_count, struct brw_page *pga,
1838 struct obd_trans_info *oti)
1839 {
1840 struct obdo *saved_oa = NULL;
1841 struct brw_page **ppga, **orig;
1842 struct obd_import *imp = class_exp2cliimp(exp);
1843 struct client_obd *cli;
1844 int rc, page_count_orig;
1845
1846 LASSERT((imp != NULL) && (imp->imp_obd != NULL));
1847 cli = &imp->imp_obd->u.cli;
1848
1849 if (cmd & OBD_BRW_CHECK) {
1850 /* The caller just wants to know if there's a chance that this
1851 * I/O can succeed */
1852
1853 if (imp->imp_invalid)
1854 return -EIO;
1855 return 0;
1856 }
1857
1858 /* test_brw with a failed create can trip this, maybe others. */
1859 LASSERT(cli->cl_max_pages_per_rpc);
1860
1861 rc = 0;
1862
1863 orig = ppga = osc_build_ppga(pga, page_count);
1864 if (ppga == NULL)
1865 return -ENOMEM;
1866 page_count_orig = page_count;
1867
1868 sort_brw_pages(ppga, page_count);
1869 while (page_count) {
1870 obd_count pages_per_brw;
1871
1872 if (page_count > cli->cl_max_pages_per_rpc)
1873 pages_per_brw = cli->cl_max_pages_per_rpc;
1874 else
1875 pages_per_brw = page_count;
1876
1877 pages_per_brw = max_unfragmented_pages(ppga, pages_per_brw);
1878
1879 if (saved_oa != NULL) {
1880 /* restore previously saved oa */
1881 *oinfo->oi_oa = *saved_oa;
1882 } else if (page_count > pages_per_brw) {
1883 /* save a copy of oa (brw will clobber it) */
1884 OBDO_ALLOC(saved_oa);
1885 if (saved_oa == NULL)
1886 GOTO(out, rc = -ENOMEM);
1887 *saved_oa = *oinfo->oi_oa;
1888 }
1889
1890 rc = osc_brw_internal(cmd, exp, oinfo->oi_oa, oinfo->oi_md,
1891 pages_per_brw, ppga, oinfo->oi_capa);
1892
1893 if (rc != 0)
1894 break;
1895
1896 page_count -= pages_per_brw;
1897 ppga += pages_per_brw;
1898 }
1899
1900 out:
1901 osc_release_ppga(orig, page_count_orig);
1902
1903 if (saved_oa != NULL)
1904 OBDO_FREE(saved_oa);
1905
1906 return rc;
1907 }
1908
1909 static int brw_interpret(const struct lu_env *env,
1910 struct ptlrpc_request *req, void *data, int rc)
1911 {
1912 struct osc_brw_async_args *aa = data;
1913 struct osc_extent *ext;
1914 struct osc_extent *tmp;
1915 struct cl_object *obj = NULL;
1916 struct client_obd *cli = aa->aa_cli;
1917
1918 rc = osc_brw_fini_request(req, rc);
1919 CDEBUG(D_INODE, "request %p aa %p rc %d\n", req, aa, rc);
1920 /* When server return -EINPROGRESS, client should always retry
1921 * regardless of the number of times the bulk was resent already. */
1922 if (osc_recoverable_error(rc)) {
1923 if (req->rq_import_generation !=
1924 req->rq_import->imp_generation) {
1925 CDEBUG(D_HA, "%s: resend cross eviction for object: "
1926 ""DOSTID", rc = %d.\n",
1927 req->rq_import->imp_obd->obd_name,
1928 POSTID(&aa->aa_oa->o_oi), rc);
1929 } else if (rc == -EINPROGRESS ||
1930 client_should_resend(aa->aa_resends, aa->aa_cli)) {
1931 rc = osc_brw_redo_request(req, aa, rc);
1932 } else {
1933 CERROR("%s: too many resent retries for object: %llu:%llu, rc = %d.\n",
1934 req->rq_import->imp_obd->obd_name,
1935 POSTID(&aa->aa_oa->o_oi), rc);
1936 }
1937
1938 if (rc == 0)
1939 return 0;
1940 else if (rc == -EAGAIN || rc == -EINPROGRESS)
1941 rc = -EIO;
1942 }
1943
1944 if (aa->aa_ocapa) {
1945 capa_put(aa->aa_ocapa);
1946 aa->aa_ocapa = NULL;
1947 }
1948
1949 list_for_each_entry_safe(ext, tmp, &aa->aa_exts, oe_link) {
1950 if (obj == NULL && rc == 0) {
1951 obj = osc2cl(ext->oe_obj);
1952 cl_object_get(obj);
1953 }
1954
1955 list_del_init(&ext->oe_link);
1956 osc_extent_finish(env, ext, 1, rc);
1957 }
1958 LASSERT(list_empty(&aa->aa_exts));
1959 LASSERT(list_empty(&aa->aa_oaps));
1960
1961 if (obj != NULL) {
1962 struct obdo *oa = aa->aa_oa;
1963 struct cl_attr *attr = &osc_env_info(env)->oti_attr;
1964 unsigned long valid = 0;
1965
1966 LASSERT(rc == 0);
1967 if (oa->o_valid & OBD_MD_FLBLOCKS) {
1968 attr->cat_blocks = oa->o_blocks;
1969 valid |= CAT_BLOCKS;
1970 }
1971 if (oa->o_valid & OBD_MD_FLMTIME) {
1972 attr->cat_mtime = oa->o_mtime;
1973 valid |= CAT_MTIME;
1974 }
1975 if (oa->o_valid & OBD_MD_FLATIME) {
1976 attr->cat_atime = oa->o_atime;
1977 valid |= CAT_ATIME;
1978 }
1979 if (oa->o_valid & OBD_MD_FLCTIME) {
1980 attr->cat_ctime = oa->o_ctime;
1981 valid |= CAT_CTIME;
1982 }
1983 if (valid != 0) {
1984 cl_object_attr_lock(obj);
1985 cl_object_attr_set(env, obj, attr, valid);
1986 cl_object_attr_unlock(obj);
1987 }
1988 cl_object_put(env, obj);
1989 }
1990 OBDO_FREE(aa->aa_oa);
1991
1992 cl_req_completion(env, aa->aa_clerq, rc < 0 ? rc :
1993 req->rq_bulk->bd_nob_transferred);
1994 osc_release_ppga(aa->aa_ppga, aa->aa_page_count);
1995 ptlrpc_lprocfs_brw(req, req->rq_bulk->bd_nob_transferred);
1996
1997 client_obd_list_lock(&cli->cl_loi_list_lock);
1998 /* We need to decrement before osc_ap_completion->osc_wake_cache_waiters
1999 * is called so we know whether to go to sync BRWs or wait for more
2000 * RPCs to complete */
2001 if (lustre_msg_get_opc(req->rq_reqmsg) == OST_WRITE)
2002 cli->cl_w_in_flight--;
2003 else
2004 cli->cl_r_in_flight--;
2005 osc_wake_cache_waiters(cli);
2006 client_obd_list_unlock(&cli->cl_loi_list_lock);
2007
2008 osc_io_unplug(env, cli, NULL, PDL_POLICY_SAME);
2009 return rc;
2010 }
2011
2012 /**
2013 * Build an RPC by the list of extent @ext_list. The caller must ensure
2014 * that the total pages in this list are NOT over max pages per RPC.
2015 * Extents in the list must be in OES_RPC state.
2016 */
2017 int osc_build_rpc(const struct lu_env *env, struct client_obd *cli,
2018 struct list_head *ext_list, int cmd, pdl_policy_t pol)
2019 {
2020 struct ptlrpc_request *req = NULL;
2021 struct osc_extent *ext;
2022 struct brw_page **pga = NULL;
2023 struct osc_brw_async_args *aa = NULL;
2024 struct obdo *oa = NULL;
2025 struct osc_async_page *oap;
2026 struct osc_async_page *tmp;
2027 struct cl_req *clerq = NULL;
2028 enum cl_req_type crt = (cmd & OBD_BRW_WRITE) ? CRT_WRITE :
2029 CRT_READ;
2030 struct ldlm_lock *lock = NULL;
2031 struct cl_req_attr *crattr = NULL;
2032 obd_off starting_offset = OBD_OBJECT_EOF;
2033 obd_off ending_offset = 0;
2034 int mpflag = 0;
2035 int mem_tight = 0;
2036 int page_count = 0;
2037 int i;
2038 int rc;
2039 LIST_HEAD(rpc_list);
2040
2041 LASSERT(!list_empty(ext_list));
2042
2043 /* add pages into rpc_list to build BRW rpc */
2044 list_for_each_entry(ext, ext_list, oe_link) {
2045 LASSERT(ext->oe_state == OES_RPC);
2046 mem_tight |= ext->oe_memalloc;
2047 list_for_each_entry(oap, &ext->oe_pages, oap_pending_item) {
2048 ++page_count;
2049 list_add_tail(&oap->oap_rpc_item, &rpc_list);
2050 if (starting_offset > oap->oap_obj_off)
2051 starting_offset = oap->oap_obj_off;
2052 else
2053 LASSERT(oap->oap_page_off == 0);
2054 if (ending_offset < oap->oap_obj_off + oap->oap_count)
2055 ending_offset = oap->oap_obj_off +
2056 oap->oap_count;
2057 else
2058 LASSERT(oap->oap_page_off + oap->oap_count ==
2059 PAGE_CACHE_SIZE);
2060 }
2061 }
2062
2063 if (mem_tight)
2064 mpflag = cfs_memory_pressure_get_and_set();
2065
2066 OBD_ALLOC(crattr, sizeof(*crattr));
2067 if (crattr == NULL)
2068 GOTO(out, rc = -ENOMEM);
2069
2070 OBD_ALLOC(pga, sizeof(*pga) * page_count);
2071 if (pga == NULL)
2072 GOTO(out, rc = -ENOMEM);
2073
2074 OBDO_ALLOC(oa);
2075 if (oa == NULL)
2076 GOTO(out, rc = -ENOMEM);
2077
2078 i = 0;
2079 list_for_each_entry(oap, &rpc_list, oap_rpc_item) {
2080 struct cl_page *page = oap2cl_page(oap);
2081 if (clerq == NULL) {
2082 clerq = cl_req_alloc(env, page, crt,
2083 1 /* only 1-object rpcs for now */);
2084 if (IS_ERR(clerq))
2085 GOTO(out, rc = PTR_ERR(clerq));
2086 lock = oap->oap_ldlm_lock;
2087 }
2088 if (mem_tight)
2089 oap->oap_brw_flags |= OBD_BRW_MEMALLOC;
2090 pga[i] = &oap->oap_brw_page;
2091 pga[i]->off = oap->oap_obj_off + oap->oap_page_off;
2092 CDEBUG(0, "put page %p index %lu oap %p flg %x to pga\n",
2093 pga[i]->pg, page_index(oap->oap_page), oap,
2094 pga[i]->flag);
2095 i++;
2096 cl_req_page_add(env, clerq, page);
2097 }
2098
2099 /* always get the data for the obdo for the rpc */
2100 LASSERT(clerq != NULL);
2101 crattr->cra_oa = oa;
2102 cl_req_attr_set(env, clerq, crattr, ~0ULL);
2103 if (lock) {
2104 oa->o_handle = lock->l_remote_handle;
2105 oa->o_valid |= OBD_MD_FLHANDLE;
2106 }
2107
2108 rc = cl_req_prep(env, clerq);
2109 if (rc != 0) {
2110 CERROR("cl_req_prep failed: %d\n", rc);
2111 GOTO(out, rc);
2112 }
2113
2114 sort_brw_pages(pga, page_count);
2115 rc = osc_brw_prep_request(cmd, cli, oa, NULL, page_count,
2116 pga, &req, crattr->cra_capa, 1, 0);
2117 if (rc != 0) {
2118 CERROR("prep_req failed: %d\n", rc);
2119 GOTO(out, rc);
2120 }
2121
2122 req->rq_interpret_reply = brw_interpret;
2123
2124 if (mem_tight != 0)
2125 req->rq_memalloc = 1;
2126
2127 /* Need to update the timestamps after the request is built in case
2128 * we race with setattr (locally or in queue at OST). If OST gets
2129 * later setattr before earlier BRW (as determined by the request xid),
2130 * the OST will not use BRW timestamps. Sadly, there is no obvious
2131 * way to do this in a single call. bug 10150 */
2132 cl_req_attr_set(env, clerq, crattr,
2133 OBD_MD_FLMTIME|OBD_MD_FLCTIME|OBD_MD_FLATIME);
2134
2135 lustre_msg_set_jobid(req->rq_reqmsg, crattr->cra_jobid);
2136
2137 CLASSERT(sizeof(*aa) <= sizeof(req->rq_async_args));
2138 aa = ptlrpc_req_async_args(req);
2139 INIT_LIST_HEAD(&aa->aa_oaps);
2140 list_splice_init(&rpc_list, &aa->aa_oaps);
2141 INIT_LIST_HEAD(&aa->aa_exts);
2142 list_splice_init(ext_list, &aa->aa_exts);
2143 aa->aa_clerq = clerq;
2144
2145 /* queued sync pages can be torn down while the pages
2146 * were between the pending list and the rpc */
2147 tmp = NULL;
2148 list_for_each_entry(oap, &aa->aa_oaps, oap_rpc_item) {
2149 /* only one oap gets a request reference */
2150 if (tmp == NULL)
2151 tmp = oap;
2152 if (oap->oap_interrupted && !req->rq_intr) {
2153 CDEBUG(D_INODE, "oap %p in req %p interrupted\n",
2154 oap, req);
2155 ptlrpc_mark_interrupted(req);
2156 }
2157 }
2158 if (tmp != NULL)
2159 tmp->oap_request = ptlrpc_request_addref(req);
2160
2161 client_obd_list_lock(&cli->cl_loi_list_lock);
2162 starting_offset >>= PAGE_CACHE_SHIFT;
2163 if (cmd == OBD_BRW_READ) {
2164 cli->cl_r_in_flight++;
2165 lprocfs_oh_tally_log2(&cli->cl_read_page_hist, page_count);
2166 lprocfs_oh_tally(&cli->cl_read_rpc_hist, cli->cl_r_in_flight);
2167 lprocfs_oh_tally_log2(&cli->cl_read_offset_hist,
2168 starting_offset + 1);
2169 } else {
2170 cli->cl_w_in_flight++;
2171 lprocfs_oh_tally_log2(&cli->cl_write_page_hist, page_count);
2172 lprocfs_oh_tally(&cli->cl_write_rpc_hist, cli->cl_w_in_flight);
2173 lprocfs_oh_tally_log2(&cli->cl_write_offset_hist,
2174 starting_offset + 1);
2175 }
2176 client_obd_list_unlock(&cli->cl_loi_list_lock);
2177
2178 DEBUG_REQ(D_INODE, req, "%d pages, aa %p. now %dr/%dw in flight",
2179 page_count, aa, cli->cl_r_in_flight,
2180 cli->cl_w_in_flight);
2181
2182 /* XXX: Maybe the caller can check the RPC bulk descriptor to
2183 * see which CPU/NUMA node the majority of pages were allocated
2184 * on, and try to assign the async RPC to the CPU core
2185 * (PDL_POLICY_PREFERRED) to reduce cross-CPU memory traffic.
2186 *
2187 * But on the other hand, we expect that multiple ptlrpcd
2188 * threads and the initial write sponsor can run in parallel,
2189 * especially when data checksum is enabled, which is CPU-bound
2190 * operation and single ptlrpcd thread cannot process in time.
2191 * So more ptlrpcd threads sharing BRW load
2192 * (with PDL_POLICY_ROUND) seems better.
2193 */
2194 ptlrpcd_add_req(req, pol, -1);
2195 rc = 0;
2196
2197 out:
2198 if (mem_tight != 0)
2199 cfs_memory_pressure_restore(mpflag);
2200
2201 if (crattr != NULL) {
2202 capa_put(crattr->cra_capa);
2203 OBD_FREE(crattr, sizeof(*crattr));
2204 }
2205
2206 if (rc != 0) {
2207 LASSERT(req == NULL);
2208
2209 if (oa)
2210 OBDO_FREE(oa);
2211 if (pga)
2212 OBD_FREE(pga, sizeof(*pga) * page_count);
2213 /* this should happen rarely and is pretty bad, it makes the
2214 * pending list not follow the dirty order */
2215 while (!list_empty(ext_list)) {
2216 ext = list_entry(ext_list->next, struct osc_extent,
2217 oe_link);
2218 list_del_init(&ext->oe_link);
2219 osc_extent_finish(env, ext, 0, rc);
2220 }
2221 if (clerq && !IS_ERR(clerq))
2222 cl_req_completion(env, clerq, rc);
2223 }
2224 return rc;
2225 }
2226
2227 static int osc_set_lock_data_with_check(struct ldlm_lock *lock,
2228 struct ldlm_enqueue_info *einfo)
2229 {
2230 void *data = einfo->ei_cbdata;
2231 int set = 0;
2232
2233 LASSERT(lock != NULL);
2234 LASSERT(lock->l_blocking_ast == einfo->ei_cb_bl);
2235 LASSERT(lock->l_resource->lr_type == einfo->ei_type);
2236 LASSERT(lock->l_completion_ast == einfo->ei_cb_cp);
2237 LASSERT(lock->l_glimpse_ast == einfo->ei_cb_gl);
2238
2239 lock_res_and_lock(lock);
2240 spin_lock(&osc_ast_guard);
2241
2242 if (lock->l_ast_data == NULL)
2243 lock->l_ast_data = data;
2244 if (lock->l_ast_data == data)
2245 set = 1;
2246
2247 spin_unlock(&osc_ast_guard);
2248 unlock_res_and_lock(lock);
2249
2250 return set;
2251 }
2252
2253 static int osc_set_data_with_check(struct lustre_handle *lockh,
2254 struct ldlm_enqueue_info *einfo)
2255 {
2256 struct ldlm_lock *lock = ldlm_handle2lock(lockh);
2257 int set = 0;
2258
2259 if (lock != NULL) {
2260 set = osc_set_lock_data_with_check(lock, einfo);
2261 LDLM_LOCK_PUT(lock);
2262 } else
2263 CERROR("lockh %p, data %p - client evicted?\n",
2264 lockh, einfo->ei_cbdata);
2265 return set;
2266 }
2267
2268 static int osc_change_cbdata(struct obd_export *exp, struct lov_stripe_md *lsm,
2269 ldlm_iterator_t replace, void *data)
2270 {
2271 struct ldlm_res_id res_id;
2272 struct obd_device *obd = class_exp2obd(exp);
2273
2274 ostid_build_res_name(&lsm->lsm_oi, &res_id);
2275 ldlm_resource_iterate(obd->obd_namespace, &res_id, replace, data);
2276 return 0;
2277 }
2278
2279 /* find any ldlm lock of the inode in osc
2280 * return 0 not find
2281 * 1 find one
2282 * < 0 error */
2283 static int osc_find_cbdata(struct obd_export *exp, struct lov_stripe_md *lsm,
2284 ldlm_iterator_t replace, void *data)
2285 {
2286 struct ldlm_res_id res_id;
2287 struct obd_device *obd = class_exp2obd(exp);
2288 int rc = 0;
2289
2290 ostid_build_res_name(&lsm->lsm_oi, &res_id);
2291 rc = ldlm_resource_iterate(obd->obd_namespace, &res_id, replace, data);
2292 if (rc == LDLM_ITER_STOP)
2293 return(1);
2294 if (rc == LDLM_ITER_CONTINUE)
2295 return(0);
2296 return(rc);
2297 }
2298
2299 static int osc_enqueue_fini(struct ptlrpc_request *req, struct ost_lvb *lvb,
2300 obd_enqueue_update_f upcall, void *cookie,
2301 __u64 *flags, int agl, int rc)
2302 {
2303 int intent = *flags & LDLM_FL_HAS_INTENT;
2304
2305 if (intent) {
2306 /* The request was created before ldlm_cli_enqueue call. */
2307 if (rc == ELDLM_LOCK_ABORTED) {
2308 struct ldlm_reply *rep;
2309 rep = req_capsule_server_get(&req->rq_pill,
2310 &RMF_DLM_REP);
2311
2312 LASSERT(rep != NULL);
2313 rep->lock_policy_res1 =
2314 ptlrpc_status_ntoh(rep->lock_policy_res1);
2315 if (rep->lock_policy_res1)
2316 rc = rep->lock_policy_res1;
2317 }
2318 }
2319
2320 if ((intent != 0 && rc == ELDLM_LOCK_ABORTED && agl == 0) ||
2321 (rc == 0)) {
2322 *flags |= LDLM_FL_LVB_READY;
2323 CDEBUG(D_INODE,"got kms %llu blocks %llu mtime %llu\n",
2324 lvb->lvb_size, lvb->lvb_blocks, lvb->lvb_mtime);
2325 }
2326
2327 /* Call the update callback. */
2328 rc = (*upcall)(cookie, rc);
2329 return rc;
2330 }
2331
2332 static int osc_enqueue_interpret(const struct lu_env *env,
2333 struct ptlrpc_request *req,
2334 struct osc_enqueue_args *aa, int rc)
2335 {
2336 struct ldlm_lock *lock;
2337 struct lustre_handle handle;
2338 __u32 mode;
2339 struct ost_lvb *lvb;
2340 __u32 lvb_len;
2341 __u64 *flags = aa->oa_flags;
2342
2343 /* Make a local copy of a lock handle and a mode, because aa->oa_*
2344 * might be freed anytime after lock upcall has been called. */
2345 lustre_handle_copy(&handle, aa->oa_lockh);
2346 mode = aa->oa_ei->ei_mode;
2347
2348 /* ldlm_cli_enqueue is holding a reference on the lock, so it must
2349 * be valid. */
2350 lock = ldlm_handle2lock(&handle);
2351
2352 /* Take an additional reference so that a blocking AST that
2353 * ldlm_cli_enqueue_fini() might post for a failed lock, is guaranteed
2354 * to arrive after an upcall has been executed by
2355 * osc_enqueue_fini(). */
2356 ldlm_lock_addref(&handle, mode);
2357
2358 /* Let CP AST to grant the lock first. */
2359 OBD_FAIL_TIMEOUT(OBD_FAIL_OSC_CP_ENQ_RACE, 1);
2360
2361 if (aa->oa_agl && rc == ELDLM_LOCK_ABORTED) {
2362 lvb = NULL;
2363 lvb_len = 0;
2364 } else {
2365 lvb = aa->oa_lvb;
2366 lvb_len = sizeof(*aa->oa_lvb);
2367 }
2368
2369 /* Complete obtaining the lock procedure. */
2370 rc = ldlm_cli_enqueue_fini(aa->oa_exp, req, aa->oa_ei->ei_type, 1,
2371 mode, flags, lvb, lvb_len, &handle, rc);
2372 /* Complete osc stuff. */
2373 rc = osc_enqueue_fini(req, aa->oa_lvb, aa->oa_upcall, aa->oa_cookie,
2374 flags, aa->oa_agl, rc);
2375
2376 OBD_FAIL_TIMEOUT(OBD_FAIL_OSC_CP_CANCEL_RACE, 10);
2377
2378 /* Release the lock for async request. */
2379 if (lustre_handle_is_used(&handle) && rc == ELDLM_OK)
2380 /*
2381 * Releases a reference taken by ldlm_cli_enqueue(), if it is
2382 * not already released by
2383 * ldlm_cli_enqueue_fini()->failed_lock_cleanup()
2384 */
2385 ldlm_lock_decref(&handle, mode);
2386
2387 LASSERTF(lock != NULL, "lockh %p, req %p, aa %p - client evicted?\n",
2388 aa->oa_lockh, req, aa);
2389 ldlm_lock_decref(&handle, mode);
2390 LDLM_LOCK_PUT(lock);
2391 return rc;
2392 }
2393
2394 void osc_update_enqueue(struct lustre_handle *lov_lockhp,
2395 struct lov_oinfo *loi, __u64 flags,
2396 struct ost_lvb *lvb, __u32 mode, int rc)
2397 {
2398 struct ldlm_lock *lock = ldlm_handle2lock(lov_lockhp);
2399
2400 if (rc == ELDLM_OK) {
2401 __u64 tmp;
2402
2403 LASSERT(lock != NULL);
2404 loi->loi_lvb = *lvb;
2405 tmp = loi->loi_lvb.lvb_size;
2406 /* Extend KMS up to the end of this lock and no further
2407 * A lock on [x,y] means a KMS of up to y + 1 bytes! */
2408 if (tmp > lock->l_policy_data.l_extent.end)
2409 tmp = lock->l_policy_data.l_extent.end + 1;
2410 if (tmp >= loi->loi_kms) {
2411 LDLM_DEBUG(lock, "lock acquired, setting rss=%llu, kms=%llu",
2412 loi->loi_lvb.lvb_size, tmp);
2413 loi_kms_set(loi, tmp);
2414 } else {
2415 LDLM_DEBUG(lock, "lock acquired, setting rss=%llu; leaving kms=%llu, end=%llu",
2416 loi->loi_lvb.lvb_size, loi->loi_kms,
2417 lock->l_policy_data.l_extent.end);
2418 }
2419 ldlm_lock_allow_match(lock);
2420 } else if (rc == ELDLM_LOCK_ABORTED && (flags & LDLM_FL_HAS_INTENT)) {
2421 LASSERT(lock != NULL);
2422 loi->loi_lvb = *lvb;
2423 ldlm_lock_allow_match(lock);
2424 CDEBUG(D_INODE, "glimpsed, setting rss=%llu; leaving kms=%llu\n",
2425 loi->loi_lvb.lvb_size, loi->loi_kms);
2426 rc = ELDLM_OK;
2427 }
2428
2429 if (lock != NULL) {
2430 if (rc != ELDLM_OK)
2431 ldlm_lock_fail_match(lock);
2432
2433 LDLM_LOCK_PUT(lock);
2434 }
2435 }
2436 EXPORT_SYMBOL(osc_update_enqueue);
2437
2438 struct ptlrpc_request_set *PTLRPCD_SET = (void *)1;
2439
2440 /* When enqueuing asynchronously, locks are not ordered, we can obtain a lock
2441 * from the 2nd OSC before a lock from the 1st one. This does not deadlock with
2442 * other synchronous requests, however keeping some locks and trying to obtain
2443 * others may take a considerable amount of time in a case of ost failure; and
2444 * when other sync requests do not get released lock from a client, the client
2445 * is excluded from the cluster -- such scenarious make the life difficult, so
2446 * release locks just after they are obtained. */
2447 int osc_enqueue_base(struct obd_export *exp, struct ldlm_res_id *res_id,
2448 __u64 *flags, ldlm_policy_data_t *policy,
2449 struct ost_lvb *lvb, int kms_valid,
2450 obd_enqueue_update_f upcall, void *cookie,
2451 struct ldlm_enqueue_info *einfo,
2452 struct lustre_handle *lockh,
2453 struct ptlrpc_request_set *rqset, int async, int agl)
2454 {
2455 struct obd_device *obd = exp->exp_obd;
2456 struct ptlrpc_request *req = NULL;
2457 int intent = *flags & LDLM_FL_HAS_INTENT;
2458 __u64 match_lvb = (agl != 0 ? 0 : LDLM_FL_LVB_READY);
2459 ldlm_mode_t mode;
2460 int rc;
2461
2462 /* Filesystem lock extents are extended to page boundaries so that
2463 * dealing with the page cache is a little smoother. */
2464 policy->l_extent.start -= policy->l_extent.start & ~CFS_PAGE_MASK;
2465 policy->l_extent.end |= ~CFS_PAGE_MASK;
2466
2467 /*
2468 * kms is not valid when either object is completely fresh (so that no
2469 * locks are cached), or object was evicted. In the latter case cached
2470 * lock cannot be used, because it would prime inode state with
2471 * potentially stale LVB.
2472 */
2473 if (!kms_valid)
2474 goto no_match;
2475
2476 /* Next, search for already existing extent locks that will cover us */
2477 /* If we're trying to read, we also search for an existing PW lock. The
2478 * VFS and page cache already protect us locally, so lots of readers/
2479 * writers can share a single PW lock.
2480 *
2481 * There are problems with conversion deadlocks, so instead of
2482 * converting a read lock to a write lock, we'll just enqueue a new
2483 * one.
2484 *
2485 * At some point we should cancel the read lock instead of making them
2486 * send us a blocking callback, but there are problems with canceling
2487 * locks out from other users right now, too. */
2488 mode = einfo->ei_mode;
2489 if (einfo->ei_mode == LCK_PR)
2490 mode |= LCK_PW;
2491 mode = ldlm_lock_match(obd->obd_namespace, *flags | match_lvb, res_id,
2492 einfo->ei_type, policy, mode, lockh, 0);
2493 if (mode) {
2494 struct ldlm_lock *matched = ldlm_handle2lock(lockh);
2495
2496 if ((agl != 0) && !(matched->l_flags & LDLM_FL_LVB_READY)) {
2497 /* For AGL, if enqueue RPC is sent but the lock is not
2498 * granted, then skip to process this strpe.
2499 * Return -ECANCELED to tell the caller. */
2500 ldlm_lock_decref(lockh, mode);
2501 LDLM_LOCK_PUT(matched);
2502 return -ECANCELED;
2503 } else if (osc_set_lock_data_with_check(matched, einfo)) {
2504 *flags |= LDLM_FL_LVB_READY;
2505 /* addref the lock only if not async requests and PW
2506 * lock is matched whereas we asked for PR. */
2507 if (!rqset && einfo->ei_mode != mode)
2508 ldlm_lock_addref(lockh, LCK_PR);
2509 if (intent) {
2510 /* I would like to be able to ASSERT here that
2511 * rss <= kms, but I can't, for reasons which
2512 * are explained in lov_enqueue() */
2513 }
2514
2515 /* We already have a lock, and it's referenced.
2516 *
2517 * At this point, the cl_lock::cll_state is CLS_QUEUING,
2518 * AGL upcall may change it to CLS_HELD directly. */
2519 (*upcall)(cookie, ELDLM_OK);
2520
2521 if (einfo->ei_mode != mode)
2522 ldlm_lock_decref(lockh, LCK_PW);
2523 else if (rqset)
2524 /* For async requests, decref the lock. */
2525 ldlm_lock_decref(lockh, einfo->ei_mode);
2526 LDLM_LOCK_PUT(matched);
2527 return ELDLM_OK;
2528 } else {
2529 ldlm_lock_decref(lockh, mode);
2530 LDLM_LOCK_PUT(matched);
2531 }
2532 }
2533
2534 no_match:
2535 if (intent) {
2536 LIST_HEAD(cancels);
2537 req = ptlrpc_request_alloc(class_exp2cliimp(exp),
2538 &RQF_LDLM_ENQUEUE_LVB);
2539 if (req == NULL)
2540 return -ENOMEM;
2541
2542 rc = ldlm_prep_enqueue_req(exp, req, &cancels, 0);
2543 if (rc) {
2544 ptlrpc_request_free(req);
2545 return rc;
2546 }
2547
2548 req_capsule_set_size(&req->rq_pill, &RMF_DLM_LVB, RCL_SERVER,
2549 sizeof(*lvb));
2550 ptlrpc_request_set_replen(req);
2551 }
2552
2553 /* users of osc_enqueue() can pass this flag for ldlm_lock_match() */
2554 *flags &= ~LDLM_FL_BLOCK_GRANTED;
2555
2556 rc = ldlm_cli_enqueue(exp, &req, einfo, res_id, policy, flags, lvb,
2557 sizeof(*lvb), LVB_T_OST, lockh, async);
2558 if (rqset) {
2559 if (!rc) {
2560 struct osc_enqueue_args *aa;
2561 CLASSERT (sizeof(*aa) <= sizeof(req->rq_async_args));
2562 aa = ptlrpc_req_async_args(req);
2563 aa->oa_ei = einfo;
2564 aa->oa_exp = exp;
2565 aa->oa_flags = flags;
2566 aa->oa_upcall = upcall;
2567 aa->oa_cookie = cookie;
2568 aa->oa_lvb = lvb;
2569 aa->oa_lockh = lockh;
2570 aa->oa_agl = !!agl;
2571
2572 req->rq_interpret_reply =
2573 (ptlrpc_interpterer_t)osc_enqueue_interpret;
2574 if (rqset == PTLRPCD_SET)
2575 ptlrpcd_add_req(req, PDL_POLICY_ROUND, -1);
2576 else
2577 ptlrpc_set_add_req(rqset, req);
2578 } else if (intent) {
2579 ptlrpc_req_finished(req);
2580 }
2581 return rc;
2582 }
2583
2584 rc = osc_enqueue_fini(req, lvb, upcall, cookie, flags, agl, rc);
2585 if (intent)
2586 ptlrpc_req_finished(req);
2587
2588 return rc;
2589 }
2590
2591 static int osc_enqueue(struct obd_export *exp, struct obd_info *oinfo,
2592 struct ldlm_enqueue_info *einfo,
2593 struct ptlrpc_request_set *rqset)
2594 {
2595 struct ldlm_res_id res_id;
2596 int rc;
2597
2598 ostid_build_res_name(&oinfo->oi_md->lsm_oi, &res_id);
2599 rc = osc_enqueue_base(exp, &res_id, &oinfo->oi_flags, &oinfo->oi_policy,
2600 &oinfo->oi_md->lsm_oinfo[0]->loi_lvb,
2601 oinfo->oi_md->lsm_oinfo[0]->loi_kms_valid,
2602 oinfo->oi_cb_up, oinfo, einfo, oinfo->oi_lockh,
2603 rqset, rqset != NULL, 0);
2604 return rc;
2605 }
2606
2607 int osc_match_base(struct obd_export *exp, struct ldlm_res_id *res_id,
2608 __u32 type, ldlm_policy_data_t *policy, __u32 mode,
2609 __u64 *flags, void *data, struct lustre_handle *lockh,
2610 int unref)
2611 {
2612 struct obd_device *obd = exp->exp_obd;
2613 __u64 lflags = *flags;
2614 ldlm_mode_t rc;
2615
2616 if (OBD_FAIL_CHECK(OBD_FAIL_OSC_MATCH))
2617 return -EIO;
2618
2619 /* Filesystem lock extents are extended to page boundaries so that
2620 * dealing with the page cache is a little smoother */
2621 policy->l_extent.start -= policy->l_extent.start & ~CFS_PAGE_MASK;
2622 policy->l_extent.end |= ~CFS_PAGE_MASK;
2623
2624 /* Next, search for already existing extent locks that will cover us */
2625 /* If we're trying to read, we also search for an existing PW lock. The
2626 * VFS and page cache already protect us locally, so lots of readers/
2627 * writers can share a single PW lock. */
2628 rc = mode;
2629 if (mode == LCK_PR)
2630 rc |= LCK_PW;
2631 rc = ldlm_lock_match(obd->obd_namespace, lflags,
2632 res_id, type, policy, rc, lockh, unref);
2633 if (rc) {
2634 if (data != NULL) {
2635 if (!osc_set_data_with_check(lockh, data)) {
2636 if (!(lflags & LDLM_FL_TEST_LOCK))
2637 ldlm_lock_decref(lockh, rc);
2638 return 0;
2639 }
2640 }
2641 if (!(lflags & LDLM_FL_TEST_LOCK) && mode != rc) {
2642 ldlm_lock_addref(lockh, LCK_PR);
2643 ldlm_lock_decref(lockh, LCK_PW);
2644 }
2645 return rc;
2646 }
2647 return rc;
2648 }
2649
2650 int osc_cancel_base(struct lustre_handle *lockh, __u32 mode)
2651 {
2652 if (unlikely(mode == LCK_GROUP))
2653 ldlm_lock_decref_and_cancel(lockh, mode);
2654 else
2655 ldlm_lock_decref(lockh, mode);
2656
2657 return 0;
2658 }
2659
2660 static int osc_cancel(struct obd_export *exp, struct lov_stripe_md *md,
2661 __u32 mode, struct lustre_handle *lockh)
2662 {
2663 return osc_cancel_base(lockh, mode);
2664 }
2665
2666 static int osc_cancel_unused(struct obd_export *exp,
2667 struct lov_stripe_md *lsm,
2668 ldlm_cancel_flags_t flags,
2669 void *opaque)
2670 {
2671 struct obd_device *obd = class_exp2obd(exp);
2672 struct ldlm_res_id res_id, *resp = NULL;
2673
2674 if (lsm != NULL) {
2675 ostid_build_res_name(&lsm->lsm_oi, &res_id);
2676 resp = &res_id;
2677 }
2678
2679 return ldlm_cli_cancel_unused(obd->obd_namespace, resp, flags, opaque);
2680 }
2681
2682 static int osc_statfs_interpret(const struct lu_env *env,
2683 struct ptlrpc_request *req,
2684 struct osc_async_args *aa, int rc)
2685 {
2686 struct obd_statfs *msfs;
2687
2688 if (rc == -EBADR)
2689 /* The request has in fact never been sent
2690 * due to issues at a higher level (LOV).
2691 * Exit immediately since the caller is
2692 * aware of the problem and takes care
2693 * of the clean up */
2694 return rc;
2695
2696 if ((rc == -ENOTCONN || rc == -EAGAIN) &&
2697 (aa->aa_oi->oi_flags & OBD_STATFS_NODELAY))
2698 GOTO(out, rc = 0);
2699
2700 if (rc != 0)
2701 GOTO(out, rc);
2702
2703 msfs = req_capsule_server_get(&req->rq_pill, &RMF_OBD_STATFS);
2704 if (msfs == NULL) {
2705 GOTO(out, rc = -EPROTO);
2706 }
2707
2708 *aa->aa_oi->oi_osfs = *msfs;
2709 out:
2710 rc = aa->aa_oi->oi_cb_up(aa->aa_oi, rc);
2711 return rc;
2712 }
2713
2714 static int osc_statfs_async(struct obd_export *exp,
2715 struct obd_info *oinfo, __u64 max_age,
2716 struct ptlrpc_request_set *rqset)
2717 {
2718 struct obd_device *obd = class_exp2obd(exp);
2719 struct ptlrpc_request *req;
2720 struct osc_async_args *aa;
2721 int rc;
2722
2723 /* We could possibly pass max_age in the request (as an absolute
2724 * timestamp or a "seconds.usec ago") so the target can avoid doing
2725 * extra calls into the filesystem if that isn't necessary (e.g.
2726 * during mount that would help a bit). Having relative timestamps
2727 * is not so great if request processing is slow, while absolute
2728 * timestamps are not ideal because they need time synchronization. */
2729 req = ptlrpc_request_alloc(obd->u.cli.cl_import, &RQF_OST_STATFS);
2730 if (req == NULL)
2731 return -ENOMEM;
2732
2733 rc = ptlrpc_request_pack(req, LUSTRE_OST_VERSION, OST_STATFS);
2734 if (rc) {
2735 ptlrpc_request_free(req);
2736 return rc;
2737 }
2738 ptlrpc_request_set_replen(req);
2739 req->rq_request_portal = OST_CREATE_PORTAL;
2740 ptlrpc_at_set_req_timeout(req);
2741
2742 if (oinfo->oi_flags & OBD_STATFS_NODELAY) {
2743 /* procfs requests not want stat in wait for avoid deadlock */
2744 req->rq_no_resend = 1;
2745 req->rq_no_delay = 1;
2746 }
2747
2748 req->rq_interpret_reply = (ptlrpc_interpterer_t)osc_statfs_interpret;
2749 CLASSERT (sizeof(*aa) <= sizeof(req->rq_async_args));
2750 aa = ptlrpc_req_async_args(req);
2751 aa->aa_oi = oinfo;
2752
2753 ptlrpc_set_add_req(rqset, req);
2754 return 0;
2755 }
2756
2757 static int osc_statfs(const struct lu_env *env, struct obd_export *exp,
2758 struct obd_statfs *osfs, __u64 max_age, __u32 flags)
2759 {
2760 struct obd_device *obd = class_exp2obd(exp);
2761 struct obd_statfs *msfs;
2762 struct ptlrpc_request *req;
2763 struct obd_import *imp = NULL;
2764 int rc;
2765
2766 /*Since the request might also come from lprocfs, so we need
2767 *sync this with client_disconnect_export Bug15684*/
2768 down_read(&obd->u.cli.cl_sem);
2769 if (obd->u.cli.cl_import)
2770 imp = class_import_get(obd->u.cli.cl_import);
2771 up_read(&obd->u.cli.cl_sem);
2772 if (!imp)
2773 return -ENODEV;
2774
2775 /* We could possibly pass max_age in the request (as an absolute
2776 * timestamp or a "seconds.usec ago") so the target can avoid doing
2777 * extra calls into the filesystem if that isn't necessary (e.g.
2778 * during mount that would help a bit). Having relative timestamps
2779 * is not so great if request processing is slow, while absolute
2780 * timestamps are not ideal because they need time synchronization. */
2781 req = ptlrpc_request_alloc(imp, &RQF_OST_STATFS);
2782
2783 class_import_put(imp);
2784
2785 if (req == NULL)
2786 return -ENOMEM;
2787
2788 rc = ptlrpc_request_pack(req, LUSTRE_OST_VERSION, OST_STATFS);
2789 if (rc) {
2790 ptlrpc_request_free(req);
2791 return rc;
2792 }
2793 ptlrpc_request_set_replen(req);
2794 req->rq_request_portal = OST_CREATE_PORTAL;
2795 ptlrpc_at_set_req_timeout(req);
2796
2797 if (flags & OBD_STATFS_NODELAY) {
2798 /* procfs requests not want stat in wait for avoid deadlock */
2799 req->rq_no_resend = 1;
2800 req->rq_no_delay = 1;
2801 }
2802
2803 rc = ptlrpc_queue_wait(req);
2804 if (rc)
2805 GOTO(out, rc);
2806
2807 msfs = req_capsule_server_get(&req->rq_pill, &RMF_OBD_STATFS);
2808 if (msfs == NULL) {
2809 GOTO(out, rc = -EPROTO);
2810 }
2811
2812 *osfs = *msfs;
2813
2814 out:
2815 ptlrpc_req_finished(req);
2816 return rc;
2817 }
2818
2819 /* Retrieve object striping information.
2820 *
2821 * @lmmu is a pointer to an in-core struct with lmm_ost_count indicating
2822 * the maximum number of OST indices which will fit in the user buffer.
2823 * lmm_magic must be LOV_MAGIC (we only use 1 slot here).
2824 */
2825 static int osc_getstripe(struct lov_stripe_md *lsm, struct lov_user_md *lump)
2826 {
2827 /* we use lov_user_md_v3 because it is larger than lov_user_md_v1 */
2828 struct lov_user_md_v3 lum, *lumk;
2829 struct lov_user_ost_data_v1 *lmm_objects;
2830 int rc = 0, lum_size;
2831
2832 if (!lsm)
2833 return -ENODATA;
2834
2835 /* we only need the header part from user space to get lmm_magic and
2836 * lmm_stripe_count, (the header part is common to v1 and v3) */
2837 lum_size = sizeof(struct lov_user_md_v1);
2838 if (copy_from_user(&lum, lump, lum_size))
2839 return -EFAULT;
2840
2841 if ((lum.lmm_magic != LOV_USER_MAGIC_V1) &&
2842 (lum.lmm_magic != LOV_USER_MAGIC_V3))
2843 return -EINVAL;
2844
2845 /* lov_user_md_vX and lov_mds_md_vX must have the same size */
2846 LASSERT(sizeof(struct lov_user_md_v1) == sizeof(struct lov_mds_md_v1));
2847 LASSERT(sizeof(struct lov_user_md_v3) == sizeof(struct lov_mds_md_v3));
2848 LASSERT(sizeof(lum.lmm_objects[0]) == sizeof(lumk->lmm_objects[0]));
2849
2850 /* we can use lov_mds_md_size() to compute lum_size
2851 * because lov_user_md_vX and lov_mds_md_vX have the same size */
2852 if (lum.lmm_stripe_count > 0) {
2853 lum_size = lov_mds_md_size(lum.lmm_stripe_count, lum.lmm_magic);
2854 OBD_ALLOC(lumk, lum_size);
2855 if (!lumk)
2856 return -ENOMEM;
2857
2858 if (lum.lmm_magic == LOV_USER_MAGIC_V1)
2859 lmm_objects =
2860 &(((struct lov_user_md_v1 *)lumk)->lmm_objects[0]);
2861 else
2862 lmm_objects = &(lumk->lmm_objects[0]);
2863 lmm_objects->l_ost_oi = lsm->lsm_oi;
2864 } else {
2865 lum_size = lov_mds_md_size(0, lum.lmm_magic);
2866 lumk = &lum;
2867 }
2868
2869 lumk->lmm_oi = lsm->lsm_oi;
2870 lumk->lmm_stripe_count = 1;
2871
2872 if (copy_to_user(lump, lumk, lum_size))
2873 rc = -EFAULT;
2874
2875 if (lumk != &lum)
2876 OBD_FREE(lumk, lum_size);
2877
2878 return rc;
2879 }
2880
2881
2882 static int osc_iocontrol(unsigned int cmd, struct obd_export *exp, int len,
2883 void *karg, void *uarg)
2884 {
2885 struct obd_device *obd = exp->exp_obd;
2886 struct obd_ioctl_data *data = karg;
2887 int err = 0;
2888
2889 if (!try_module_get(THIS_MODULE)) {
2890 CERROR("Can't get module. Is it alive?");
2891 return -EINVAL;
2892 }
2893 switch (cmd) {
2894 case OBD_IOC_LOV_GET_CONFIG: {
2895 char *buf;
2896 struct lov_desc *desc;
2897 struct obd_uuid uuid;
2898
2899 buf = NULL;
2900 len = 0;
2901 if (obd_ioctl_getdata(&buf, &len, (void *)uarg))
2902 GOTO(out, err = -EINVAL);
2903
2904 data = (struct obd_ioctl_data *)buf;
2905
2906 if (sizeof(*desc) > data->ioc_inllen1) {
2907 obd_ioctl_freedata(buf, len);
2908 GOTO(out, err = -EINVAL);
2909 }
2910
2911 if (data->ioc_inllen2 < sizeof(uuid)) {
2912 obd_ioctl_freedata(buf, len);
2913 GOTO(out, err = -EINVAL);
2914 }
2915
2916 desc = (struct lov_desc *)data->ioc_inlbuf1;
2917 desc->ld_tgt_count = 1;
2918 desc->ld_active_tgt_count = 1;
2919 desc->ld_default_stripe_count = 1;
2920 desc->ld_default_stripe_size = 0;
2921 desc->ld_default_stripe_offset = 0;
2922 desc->ld_pattern = 0;
2923 memcpy(&desc->ld_uuid, &obd->obd_uuid, sizeof(uuid));
2924
2925 memcpy(data->ioc_inlbuf2, &obd->obd_uuid, sizeof(uuid));
2926
2927 err = copy_to_user((void *)uarg, buf, len);
2928 if (err)
2929 err = -EFAULT;
2930 obd_ioctl_freedata(buf, len);
2931 GOTO(out, err);
2932 }
2933 case LL_IOC_LOV_SETSTRIPE:
2934 err = obd_alloc_memmd(exp, karg);
2935 if (err > 0)
2936 err = 0;
2937 GOTO(out, err);
2938 case LL_IOC_LOV_GETSTRIPE:
2939 err = osc_getstripe(karg, uarg);
2940 GOTO(out, err);
2941 case OBD_IOC_CLIENT_RECOVER:
2942 err = ptlrpc_recover_import(obd->u.cli.cl_import,
2943 data->ioc_inlbuf1, 0);
2944 if (err > 0)
2945 err = 0;
2946 GOTO(out, err);
2947 case IOC_OSC_SET_ACTIVE:
2948 err = ptlrpc_set_import_active(obd->u.cli.cl_import,
2949 data->ioc_offset);
2950 GOTO(out, err);
2951 case OBD_IOC_POLL_QUOTACHECK:
2952 err = osc_quota_poll_check(exp, (struct if_quotacheck *)karg);
2953 GOTO(out, err);
2954 case OBD_IOC_PING_TARGET:
2955 err = ptlrpc_obd_ping(obd);
2956 GOTO(out, err);
2957 default:
2958 CDEBUG(D_INODE, "unrecognised ioctl %#x by %s\n",
2959 cmd, current_comm());
2960 GOTO(out, err = -ENOTTY);
2961 }
2962 out:
2963 module_put(THIS_MODULE);
2964 return err;
2965 }
2966
2967 static int osc_get_info(const struct lu_env *env, struct obd_export *exp,
2968 obd_count keylen, void *key, __u32 *vallen, void *val,
2969 struct lov_stripe_md *lsm)
2970 {
2971 if (!vallen || !val)
2972 return -EFAULT;
2973
2974 if (KEY_IS(KEY_LOCK_TO_STRIPE)) {
2975 __u32 *stripe = val;
2976 *vallen = sizeof(*stripe);
2977 *stripe = 0;
2978 return 0;
2979 } else if (KEY_IS(KEY_LAST_ID)) {
2980 struct ptlrpc_request *req;
2981 obd_id *reply;
2982 char *tmp;
2983 int rc;
2984
2985 req = ptlrpc_request_alloc(class_exp2cliimp(exp),
2986 &RQF_OST_GET_INFO_LAST_ID);
2987 if (req == NULL)
2988 return -ENOMEM;
2989
2990 req_capsule_set_size(&req->rq_pill, &RMF_SETINFO_KEY,
2991 RCL_CLIENT, keylen);
2992 rc = ptlrpc_request_pack(req, LUSTRE_OST_VERSION, OST_GET_INFO);
2993 if (rc) {
2994 ptlrpc_request_free(req);
2995 return rc;
2996 }
2997
2998 tmp = req_capsule_client_get(&req->rq_pill, &RMF_SETINFO_KEY);
2999 memcpy(tmp, key, keylen);
3000
3001 req->rq_no_delay = req->rq_no_resend = 1;
3002 ptlrpc_request_set_replen(req);
3003 rc = ptlrpc_queue_wait(req);
3004 if (rc)
3005 GOTO(out, rc);
3006
3007 reply = req_capsule_server_get(&req->rq_pill, &RMF_OBD_ID);
3008 if (reply == NULL)
3009 GOTO(out, rc = -EPROTO);
3010
3011 *((obd_id *)val) = *reply;
3012 out:
3013 ptlrpc_req_finished(req);
3014 return rc;
3015 } else if (KEY_IS(KEY_FIEMAP)) {
3016 struct ll_fiemap_info_key *fm_key =
3017 (struct ll_fiemap_info_key *)key;
3018 struct ldlm_res_id res_id;
3019 ldlm_policy_data_t policy;
3020 struct lustre_handle lockh;
3021 ldlm_mode_t mode = 0;
3022 struct ptlrpc_request *req;
3023 struct ll_user_fiemap *reply;
3024 char *tmp;
3025 int rc;
3026
3027 if (!(fm_key->fiemap.fm_flags & FIEMAP_FLAG_SYNC))
3028 goto skip_locking;
3029
3030 policy.l_extent.start = fm_key->fiemap.fm_start &
3031 CFS_PAGE_MASK;
3032
3033 if (OBD_OBJECT_EOF - fm_key->fiemap.fm_length <=
3034 fm_key->fiemap.fm_start + PAGE_CACHE_SIZE - 1)
3035 policy.l_extent.end = OBD_OBJECT_EOF;
3036 else
3037 policy.l_extent.end = (fm_key->fiemap.fm_start +
3038 fm_key->fiemap.fm_length +
3039 PAGE_CACHE_SIZE - 1) & CFS_PAGE_MASK;
3040
3041 ostid_build_res_name(&fm_key->oa.o_oi, &res_id);
3042 mode = ldlm_lock_match(exp->exp_obd->obd_namespace,
3043 LDLM_FL_BLOCK_GRANTED |
3044 LDLM_FL_LVB_READY,
3045 &res_id, LDLM_EXTENT, &policy,
3046 LCK_PR | LCK_PW, &lockh, 0);
3047 if (mode) { /* lock is cached on client */
3048 if (mode != LCK_PR) {
3049 ldlm_lock_addref(&lockh, LCK_PR);
3050 ldlm_lock_decref(&lockh, LCK_PW);
3051 }
3052 } else { /* no cached lock, needs acquire lock on server side */
3053 fm_key->oa.o_valid |= OBD_MD_FLFLAGS;
3054 fm_key->oa.o_flags |= OBD_FL_SRVLOCK;
3055 }
3056
3057 skip_locking:
3058 req = ptlrpc_request_alloc(class_exp2cliimp(exp),
3059 &RQF_OST_GET_INFO_FIEMAP);
3060 if (req == NULL)
3061 GOTO(drop_lock, rc = -ENOMEM);
3062
3063 req_capsule_set_size(&req->rq_pill, &RMF_FIEMAP_KEY,
3064 RCL_CLIENT, keylen);
3065 req_capsule_set_size(&req->rq_pill, &RMF_FIEMAP_VAL,
3066 RCL_CLIENT, *vallen);
3067 req_capsule_set_size(&req->rq_pill, &RMF_FIEMAP_VAL,
3068 RCL_SERVER, *vallen);
3069
3070 rc = ptlrpc_request_pack(req, LUSTRE_OST_VERSION, OST_GET_INFO);
3071 if (rc) {
3072 ptlrpc_request_free(req);
3073 GOTO(drop_lock, rc);
3074 }
3075
3076 tmp = req_capsule_client_get(&req->rq_pill, &RMF_FIEMAP_KEY);
3077 memcpy(tmp, key, keylen);
3078 tmp = req_capsule_client_get(&req->rq_pill, &RMF_FIEMAP_VAL);
3079 memcpy(tmp, val, *vallen);
3080
3081 ptlrpc_request_set_replen(req);
3082 rc = ptlrpc_queue_wait(req);
3083 if (rc)
3084 GOTO(fini_req, rc);
3085
3086 reply = req_capsule_server_get(&req->rq_pill, &RMF_FIEMAP_VAL);
3087 if (reply == NULL)
3088 GOTO(fini_req, rc = -EPROTO);
3089
3090 memcpy(val, reply, *vallen);
3091 fini_req:
3092 ptlrpc_req_finished(req);
3093 drop_lock:
3094 if (mode)
3095 ldlm_lock_decref(&lockh, LCK_PR);
3096 return rc;
3097 }
3098
3099 return -EINVAL;
3100 }
3101
3102 static int osc_set_info_async(const struct lu_env *env, struct obd_export *exp,
3103 obd_count keylen, void *key, obd_count vallen,
3104 void *val, struct ptlrpc_request_set *set)
3105 {
3106 struct ptlrpc_request *req;
3107 struct obd_device *obd = exp->exp_obd;
3108 struct obd_import *imp = class_exp2cliimp(exp);
3109 char *tmp;
3110 int rc;
3111
3112 OBD_FAIL_TIMEOUT(OBD_FAIL_OSC_SHUTDOWN, 10);
3113
3114 if (KEY_IS(KEY_CHECKSUM)) {
3115 if (vallen != sizeof(int))
3116 return -EINVAL;
3117 exp->exp_obd->u.cli.cl_checksum = (*(int *)val) ? 1 : 0;
3118 return 0;
3119 }
3120
3121 if (KEY_IS(KEY_SPTLRPC_CONF)) {
3122 sptlrpc_conf_client_adapt(obd);
3123 return 0;
3124 }
3125
3126 if (KEY_IS(KEY_FLUSH_CTX)) {
3127 sptlrpc_import_flush_my_ctx(imp);
3128 return 0;
3129 }
3130
3131 if (KEY_IS(KEY_CACHE_SET)) {
3132 struct client_obd *cli = &obd->u.cli;
3133
3134 LASSERT(cli->cl_cache == NULL); /* only once */
3135 cli->cl_cache = (struct cl_client_cache *)val;
3136 atomic_inc(&cli->cl_cache->ccc_users);
3137 cli->cl_lru_left = &cli->cl_cache->ccc_lru_left;
3138
3139 /* add this osc into entity list */
3140 LASSERT(list_empty(&cli->cl_lru_osc));
3141 spin_lock(&cli->cl_cache->ccc_lru_lock);
3142 list_add(&cli->cl_lru_osc, &cli->cl_cache->ccc_lru);
3143 spin_unlock(&cli->cl_cache->ccc_lru_lock);
3144
3145 return 0;
3146 }
3147
3148 if (KEY_IS(KEY_CACHE_LRU_SHRINK)) {
3149 struct client_obd *cli = &obd->u.cli;
3150 int nr = atomic_read(&cli->cl_lru_in_list) >> 1;
3151 int target = *(int *)val;
3152
3153 nr = osc_lru_shrink(cli, min(nr, target));
3154 *(int *)val -= nr;
3155 return 0;
3156 }
3157
3158 if (!set && !KEY_IS(KEY_GRANT_SHRINK))
3159 return -EINVAL;
3160
3161 /* We pass all other commands directly to OST. Since nobody calls osc
3162 methods directly and everybody is supposed to go through LOV, we
3163 assume lov checked invalid values for us.
3164 The only recognised values so far are evict_by_nid and mds_conn.
3165 Even if something bad goes through, we'd get a -EINVAL from OST
3166 anyway. */
3167
3168 req = ptlrpc_request_alloc(imp, KEY_IS(KEY_GRANT_SHRINK) ?
3169 &RQF_OST_SET_GRANT_INFO :
3170 &RQF_OBD_SET_INFO);
3171 if (req == NULL)
3172 return -ENOMEM;
3173
3174 req_capsule_set_size(&req->rq_pill, &RMF_SETINFO_KEY,
3175 RCL_CLIENT, keylen);
3176 if (!KEY_IS(KEY_GRANT_SHRINK))
3177 req_capsule_set_size(&req->rq_pill, &RMF_SETINFO_VAL,
3178 RCL_CLIENT, vallen);
3179 rc = ptlrpc_request_pack(req, LUSTRE_OST_VERSION, OST_SET_INFO);
3180 if (rc) {
3181 ptlrpc_request_free(req);
3182 return rc;
3183 }
3184
3185 tmp = req_capsule_client_get(&req->rq_pill, &RMF_SETINFO_KEY);
3186 memcpy(tmp, key, keylen);
3187 tmp = req_capsule_client_get(&req->rq_pill, KEY_IS(KEY_GRANT_SHRINK) ?
3188 &RMF_OST_BODY :
3189 &RMF_SETINFO_VAL);
3190 memcpy(tmp, val, vallen);
3191
3192 if (KEY_IS(KEY_GRANT_SHRINK)) {
3193 struct osc_grant_args *aa;
3194 struct obdo *oa;
3195
3196 CLASSERT(sizeof(*aa) <= sizeof(req->rq_async_args));
3197 aa = ptlrpc_req_async_args(req);
3198 OBDO_ALLOC(oa);
3199 if (!oa) {
3200 ptlrpc_req_finished(req);
3201 return -ENOMEM;
3202 }
3203 *oa = ((struct ost_body *)val)->oa;
3204 aa->aa_oa = oa;
3205 req->rq_interpret_reply = osc_shrink_grant_interpret;
3206 }
3207
3208 ptlrpc_request_set_replen(req);
3209 if (!KEY_IS(KEY_GRANT_SHRINK)) {
3210 LASSERT(set != NULL);
3211 ptlrpc_set_add_req(set, req);
3212 ptlrpc_check_set(NULL, set);
3213 } else
3214 ptlrpcd_add_req(req, PDL_POLICY_ROUND, -1);
3215
3216 return 0;
3217 }
3218
3219
3220 static int osc_llog_init(struct obd_device *obd, struct obd_llog_group *olg,
3221 struct obd_device *disk_obd, int *index)
3222 {
3223 /* this code is not supposed to be used with LOD/OSP
3224 * to be removed soon */
3225 LBUG();
3226 return 0;
3227 }
3228
3229 static int osc_llog_finish(struct obd_device *obd, int count)
3230 {
3231 struct llog_ctxt *ctxt;
3232
3233 ctxt = llog_get_context(obd, LLOG_MDS_OST_ORIG_CTXT);
3234 if (ctxt) {
3235 llog_cat_close(NULL, ctxt->loc_handle);
3236 llog_cleanup(NULL, ctxt);
3237 }
3238
3239 ctxt = llog_get_context(obd, LLOG_SIZE_REPL_CTXT);
3240 if (ctxt)
3241 llog_cleanup(NULL, ctxt);
3242 return 0;
3243 }
3244
3245 static int osc_reconnect(const struct lu_env *env,
3246 struct obd_export *exp, struct obd_device *obd,
3247 struct obd_uuid *cluuid,
3248 struct obd_connect_data *data,
3249 void *localdata)
3250 {
3251 struct client_obd *cli = &obd->u.cli;
3252
3253 if (data != NULL && (data->ocd_connect_flags & OBD_CONNECT_GRANT)) {
3254 long lost_grant;
3255
3256 client_obd_list_lock(&cli->cl_loi_list_lock);
3257 data->ocd_grant = (cli->cl_avail_grant + cli->cl_dirty) ?:
3258 2 * cli_brw_size(obd);
3259 lost_grant = cli->cl_lost_grant;
3260 cli->cl_lost_grant = 0;
3261 client_obd_list_unlock(&cli->cl_loi_list_lock);
3262
3263 CDEBUG(D_RPCTRACE, "ocd_connect_flags: %#llx ocd_version: %d"
3264 " ocd_grant: %d, lost: %ld.\n", data->ocd_connect_flags,
3265 data->ocd_version, data->ocd_grant, lost_grant);
3266 }
3267
3268 return 0;
3269 }
3270
3271 static int osc_disconnect(struct obd_export *exp)
3272 {
3273 struct obd_device *obd = class_exp2obd(exp);
3274 struct llog_ctxt *ctxt;
3275 int rc;
3276
3277 ctxt = llog_get_context(obd, LLOG_SIZE_REPL_CTXT);
3278 if (ctxt) {
3279 if (obd->u.cli.cl_conn_count == 1) {
3280 /* Flush any remaining cancel messages out to the
3281 * target */
3282 llog_sync(ctxt, exp, 0);
3283 }
3284 llog_ctxt_put(ctxt);
3285 } else {
3286 CDEBUG(D_HA, "No LLOG_SIZE_REPL_CTXT found in obd %p\n",
3287 obd);
3288 }
3289
3290 rc = client_disconnect_export(exp);
3291 /**
3292 * Initially we put del_shrink_grant before disconnect_export, but it
3293 * causes the following problem if setup (connect) and cleanup
3294 * (disconnect) are tangled together.
3295 * connect p1 disconnect p2
3296 * ptlrpc_connect_import
3297 * ............... class_manual_cleanup
3298 * osc_disconnect
3299 * del_shrink_grant
3300 * ptlrpc_connect_interrupt
3301 * init_grant_shrink
3302 * add this client to shrink list
3303 * cleanup_osc
3304 * Bang! pinger trigger the shrink.
3305 * So the osc should be disconnected from the shrink list, after we
3306 * are sure the import has been destroyed. BUG18662
3307 */
3308 if (obd->u.cli.cl_import == NULL)
3309 osc_del_shrink_grant(&obd->u.cli);
3310 return rc;
3311 }
3312
3313 static int osc_import_event(struct obd_device *obd,
3314 struct obd_import *imp,
3315 enum obd_import_event event)
3316 {
3317 struct client_obd *cli;
3318 int rc = 0;
3319
3320 LASSERT(imp->imp_obd == obd);
3321
3322 switch (event) {
3323 case IMP_EVENT_DISCON: {
3324 cli = &obd->u.cli;
3325 client_obd_list_lock(&cli->cl_loi_list_lock);
3326 cli->cl_avail_grant = 0;
3327 cli->cl_lost_grant = 0;
3328 client_obd_list_unlock(&cli->cl_loi_list_lock);
3329 break;
3330 }
3331 case IMP_EVENT_INACTIVE: {
3332 rc = obd_notify_observer(obd, obd, OBD_NOTIFY_INACTIVE, NULL);
3333 break;
3334 }
3335 case IMP_EVENT_INVALIDATE: {
3336 struct ldlm_namespace *ns = obd->obd_namespace;
3337 struct lu_env *env;
3338 int refcheck;
3339
3340 env = cl_env_get(&refcheck);
3341 if (!IS_ERR(env)) {
3342 /* Reset grants */
3343 cli = &obd->u.cli;
3344 /* all pages go to failing rpcs due to the invalid
3345 * import */
3346 osc_io_unplug(env, cli, NULL, PDL_POLICY_ROUND);
3347
3348 ldlm_namespace_cleanup(ns, LDLM_FL_LOCAL_ONLY);
3349 cl_env_put(env, &refcheck);
3350 } else
3351 rc = PTR_ERR(env);
3352 break;
3353 }
3354 case IMP_EVENT_ACTIVE: {
3355 rc = obd_notify_observer(obd, obd, OBD_NOTIFY_ACTIVE, NULL);
3356 break;
3357 }
3358 case IMP_EVENT_OCD: {
3359 struct obd_connect_data *ocd = &imp->imp_connect_data;
3360
3361 if (ocd->ocd_connect_flags & OBD_CONNECT_GRANT)
3362 osc_init_grant(&obd->u.cli, ocd);
3363
3364 /* See bug 7198 */
3365 if (ocd->ocd_connect_flags & OBD_CONNECT_REQPORTAL)
3366 imp->imp_client->cli_request_portal =OST_REQUEST_PORTAL;
3367
3368 rc = obd_notify_observer(obd, obd, OBD_NOTIFY_OCD, NULL);
3369 break;
3370 }
3371 case IMP_EVENT_DEACTIVATE: {
3372 rc = obd_notify_observer(obd, obd, OBD_NOTIFY_DEACTIVATE, NULL);
3373 break;
3374 }
3375 case IMP_EVENT_ACTIVATE: {
3376 rc = obd_notify_observer(obd, obd, OBD_NOTIFY_ACTIVATE, NULL);
3377 break;
3378 }
3379 default:
3380 CERROR("Unknown import event %d\n", event);
3381 LBUG();
3382 }
3383 return rc;
3384 }
3385
3386 /**
3387 * Determine whether the lock can be canceled before replaying the lock
3388 * during recovery, see bug16774 for detailed information.
3389 *
3390 * \retval zero the lock can't be canceled
3391 * \retval other ok to cancel
3392 */
3393 static int osc_cancel_for_recovery(struct ldlm_lock *lock)
3394 {
3395 check_res_locked(lock->l_resource);
3396
3397 /*
3398 * Cancel all unused extent lock in granted mode LCK_PR or LCK_CR.
3399 *
3400 * XXX as a future improvement, we can also cancel unused write lock
3401 * if it doesn't have dirty data and active mmaps.
3402 */
3403 if (lock->l_resource->lr_type == LDLM_EXTENT &&
3404 (lock->l_granted_mode == LCK_PR ||
3405 lock->l_granted_mode == LCK_CR) &&
3406 (osc_dlm_lock_pageref(lock) == 0))
3407 return 1;
3408
3409 return 0;
3410 }
3411
3412 static int brw_queue_work(const struct lu_env *env, void *data)
3413 {
3414 struct client_obd *cli = data;
3415
3416 CDEBUG(D_CACHE, "Run writeback work for client obd %p.\n", cli);
3417
3418 osc_io_unplug(env, cli, NULL, PDL_POLICY_SAME);
3419 return 0;
3420 }
3421
3422 int osc_setup(struct obd_device *obd, struct lustre_cfg *lcfg)
3423 {
3424 struct lprocfs_static_vars lvars = { 0 };
3425 struct client_obd *cli = &obd->u.cli;
3426 void *handler;
3427 int rc;
3428
3429 rc = ptlrpcd_addref();
3430 if (rc)
3431 return rc;
3432
3433 rc = client_obd_setup(obd, lcfg);
3434 if (rc)
3435 GOTO(out_ptlrpcd, rc);
3436
3437 handler = ptlrpcd_alloc_work(cli->cl_import, brw_queue_work, cli);
3438 if (IS_ERR(handler))
3439 GOTO(out_client_setup, rc = PTR_ERR(handler));
3440 cli->cl_writeback_work = handler;
3441
3442 rc = osc_quota_setup(obd);
3443 if (rc)
3444 GOTO(out_ptlrpcd_work, rc);
3445
3446 cli->cl_grant_shrink_interval = GRANT_SHRINK_INTERVAL;
3447 lprocfs_osc_init_vars(&lvars);
3448 if (lprocfs_obd_setup(obd, lvars.obd_vars) == 0) {
3449 lproc_osc_attach_seqstat(obd);
3450 sptlrpc_lprocfs_cliobd_attach(obd);
3451 ptlrpc_lprocfs_register_obd(obd);
3452 }
3453
3454 /* We need to allocate a few requests more, because
3455 * brw_interpret tries to create new requests before freeing
3456 * previous ones, Ideally we want to have 2x max_rpcs_in_flight
3457 * reserved, but I'm afraid that might be too much wasted RAM
3458 * in fact, so 2 is just my guess and still should work. */
3459 cli->cl_import->imp_rq_pool =
3460 ptlrpc_init_rq_pool(cli->cl_max_rpcs_in_flight + 2,
3461 OST_MAXREQSIZE,
3462 ptlrpc_add_rqs_to_pool);
3463
3464 INIT_LIST_HEAD(&cli->cl_grant_shrink_list);
3465 ns_register_cancel(obd->obd_namespace, osc_cancel_for_recovery);
3466 return rc;
3467
3468 out_ptlrpcd_work:
3469 ptlrpcd_destroy_work(handler);
3470 out_client_setup:
3471 client_obd_cleanup(obd);
3472 out_ptlrpcd:
3473 ptlrpcd_decref();
3474 return rc;
3475 }
3476
3477 static int osc_precleanup(struct obd_device *obd, enum obd_cleanup_stage stage)
3478 {
3479 int rc = 0;
3480
3481 switch (stage) {
3482 case OBD_CLEANUP_EARLY: {
3483 struct obd_import *imp;
3484 imp = obd->u.cli.cl_import;
3485 CDEBUG(D_HA, "Deactivating import %s\n", obd->obd_name);
3486 /* ptlrpc_abort_inflight to stop an mds_lov_synchronize */
3487 ptlrpc_deactivate_import(imp);
3488 spin_lock(&imp->imp_lock);
3489 imp->imp_pingable = 0;
3490 spin_unlock(&imp->imp_lock);
3491 break;
3492 }
3493 case OBD_CLEANUP_EXPORTS: {
3494 struct client_obd *cli = &obd->u.cli;
3495 /* LU-464
3496 * for echo client, export may be on zombie list, wait for
3497 * zombie thread to cull it, because cli.cl_import will be
3498 * cleared in client_disconnect_export():
3499 * class_export_destroy() -> obd_cleanup() ->
3500 * echo_device_free() -> echo_client_cleanup() ->
3501 * obd_disconnect() -> osc_disconnect() ->
3502 * client_disconnect_export()
3503 */
3504 obd_zombie_barrier();
3505 if (cli->cl_writeback_work) {
3506 ptlrpcd_destroy_work(cli->cl_writeback_work);
3507 cli->cl_writeback_work = NULL;
3508 }
3509 obd_cleanup_client_import(obd);
3510 ptlrpc_lprocfs_unregister_obd(obd);
3511 lprocfs_obd_cleanup(obd);
3512 rc = obd_llog_finish(obd, 0);
3513 if (rc != 0)
3514 CERROR("failed to cleanup llogging subsystems\n");
3515 break;
3516 }
3517 }
3518 return rc;
3519 }
3520
3521 int osc_cleanup(struct obd_device *obd)
3522 {
3523 struct client_obd *cli = &obd->u.cli;
3524 int rc;
3525
3526 /* lru cleanup */
3527 if (cli->cl_cache != NULL) {
3528 LASSERT(atomic_read(&cli->cl_cache->ccc_users) > 0);
3529 spin_lock(&cli->cl_cache->ccc_lru_lock);
3530 list_del_init(&cli->cl_lru_osc);
3531 spin_unlock(&cli->cl_cache->ccc_lru_lock);
3532 cli->cl_lru_left = NULL;
3533 atomic_dec(&cli->cl_cache->ccc_users);
3534 cli->cl_cache = NULL;
3535 }
3536
3537 /* free memory of osc quota cache */
3538 osc_quota_cleanup(obd);
3539
3540 rc = client_obd_cleanup(obd);
3541
3542 ptlrpcd_decref();
3543 return rc;
3544 }
3545
3546 int osc_process_config_base(struct obd_device *obd, struct lustre_cfg *lcfg)
3547 {
3548 struct lprocfs_static_vars lvars = { 0 };
3549 int rc = 0;
3550
3551 lprocfs_osc_init_vars(&lvars);
3552
3553 switch (lcfg->lcfg_command) {
3554 default:
3555 rc = class_process_proc_param(PARAM_OSC, lvars.obd_vars,
3556 lcfg, obd);
3557 if (rc > 0)
3558 rc = 0;
3559 break;
3560 }
3561
3562 return(rc);
3563 }
3564
3565 static int osc_process_config(struct obd_device *obd, obd_count len, void *buf)
3566 {
3567 return osc_process_config_base(obd, buf);
3568 }
3569
3570 struct obd_ops osc_obd_ops = {
3571 .o_owner = THIS_MODULE,
3572 .o_setup = osc_setup,
3573 .o_precleanup = osc_precleanup,
3574 .o_cleanup = osc_cleanup,
3575 .o_add_conn = client_import_add_conn,
3576 .o_del_conn = client_import_del_conn,
3577 .o_connect = client_connect_import,
3578 .o_reconnect = osc_reconnect,
3579 .o_disconnect = osc_disconnect,
3580 .o_statfs = osc_statfs,
3581 .o_statfs_async = osc_statfs_async,
3582 .o_packmd = osc_packmd,
3583 .o_unpackmd = osc_unpackmd,
3584 .o_create = osc_create,
3585 .o_destroy = osc_destroy,
3586 .o_getattr = osc_getattr,
3587 .o_getattr_async = osc_getattr_async,
3588 .o_setattr = osc_setattr,
3589 .o_setattr_async = osc_setattr_async,
3590 .o_brw = osc_brw,
3591 .o_punch = osc_punch,
3592 .o_sync = osc_sync,
3593 .o_enqueue = osc_enqueue,
3594 .o_change_cbdata = osc_change_cbdata,
3595 .o_find_cbdata = osc_find_cbdata,
3596 .o_cancel = osc_cancel,
3597 .o_cancel_unused = osc_cancel_unused,
3598 .o_iocontrol = osc_iocontrol,
3599 .o_get_info = osc_get_info,
3600 .o_set_info_async = osc_set_info_async,
3601 .o_import_event = osc_import_event,
3602 .o_llog_init = osc_llog_init,
3603 .o_llog_finish = osc_llog_finish,
3604 .o_process_config = osc_process_config,
3605 .o_quotactl = osc_quotactl,
3606 .o_quotacheck = osc_quotacheck,
3607 };
3608
3609 extern struct lu_kmem_descr osc_caches[];
3610 extern spinlock_t osc_ast_guard;
3611 extern struct lock_class_key osc_ast_guard_class;
3612
3613 int __init osc_init(void)
3614 {
3615 struct lprocfs_static_vars lvars = { 0 };
3616 int rc;
3617
3618 /* print an address of _any_ initialized kernel symbol from this
3619 * module, to allow debugging with gdb that doesn't support data
3620 * symbols from modules.*/
3621 CDEBUG(D_INFO, "Lustre OSC module (%p).\n", &osc_caches);
3622
3623 rc = lu_kmem_init(osc_caches);
3624 if (rc)
3625 return rc;
3626
3627 lprocfs_osc_init_vars(&lvars);
3628
3629 rc = class_register_type(&osc_obd_ops, NULL, lvars.module_vars,
3630 LUSTRE_OSC_NAME, &osc_device_type);
3631 if (rc) {
3632 lu_kmem_fini(osc_caches);
3633 return rc;
3634 }
3635
3636 spin_lock_init(&osc_ast_guard);
3637 lockdep_set_class(&osc_ast_guard, &osc_ast_guard_class);
3638
3639 return rc;
3640 }
3641
3642 static void /*__exit*/ osc_exit(void)
3643 {
3644 class_unregister_type(LUSTRE_OSC_NAME);
3645 lu_kmem_fini(osc_caches);
3646 }
3647
3648 MODULE_AUTHOR("Sun Microsystems, Inc. <http://www.lustre.org/>");
3649 MODULE_DESCRIPTION("Lustre Object Storage Client (OSC)");
3650 MODULE_LICENSE("GPL");
3651 MODULE_VERSION(LUSTRE_VERSION_STRING);
3652
3653 module_init(osc_init);
3654 module_exit(osc_exit);
Linux kernel - Deliverables
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