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Merge remote-tracking branch 'asoc/fix/omap' into asoc-linus
[deliverable/linux.git] / drivers / staging / lustre / lustre / mdc / mdc_locks.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) 2003, 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_MDC
38
39 # include <linux/module.h>
40 # include <linux/pagemap.h>
41 # include <linux/miscdevice.h>
42 # include <linux/init.h>
43
44 #include <lustre_acl.h>
45 #include <obd_class.h>
46 #include <lustre_dlm.h>
47 /* fid_res_name_eq() */
48 #include <lustre_fid.h>
49 #include <lprocfs_status.h>
50 #include "mdc_internal.h"
51
52 struct mdc_getattr_args {
53 struct obd_export *ga_exp;
54 struct md_enqueue_info *ga_minfo;
55 struct ldlm_enqueue_info *ga_einfo;
56 };
57
58 int it_disposition(struct lookup_intent *it, int flag)
59 {
60 return it->d.lustre.it_disposition & flag;
61 }
62 EXPORT_SYMBOL(it_disposition);
63
64 void it_set_disposition(struct lookup_intent *it, int flag)
65 {
66 it->d.lustre.it_disposition |= flag;
67 }
68 EXPORT_SYMBOL(it_set_disposition);
69
70 void it_clear_disposition(struct lookup_intent *it, int flag)
71 {
72 it->d.lustre.it_disposition &= ~flag;
73 }
74 EXPORT_SYMBOL(it_clear_disposition);
75
76 int it_open_error(int phase, struct lookup_intent *it)
77 {
78 if (it_disposition(it, DISP_OPEN_OPEN)) {
79 if (phase >= DISP_OPEN_OPEN)
80 return it->d.lustre.it_status;
81 else
82 return 0;
83 }
84
85 if (it_disposition(it, DISP_OPEN_CREATE)) {
86 if (phase >= DISP_OPEN_CREATE)
87 return it->d.lustre.it_status;
88 else
89 return 0;
90 }
91
92 if (it_disposition(it, DISP_LOOKUP_EXECD)) {
93 if (phase >= DISP_LOOKUP_EXECD)
94 return it->d.lustre.it_status;
95 else
96 return 0;
97 }
98
99 if (it_disposition(it, DISP_IT_EXECD)) {
100 if (phase >= DISP_IT_EXECD)
101 return it->d.lustre.it_status;
102 else
103 return 0;
104 }
105 CERROR("it disp: %X, status: %d\n", it->d.lustre.it_disposition,
106 it->d.lustre.it_status);
107 LBUG();
108 return 0;
109 }
110 EXPORT_SYMBOL(it_open_error);
111
112 /* this must be called on a lockh that is known to have a referenced lock */
113 int mdc_set_lock_data(struct obd_export *exp, __u64 *lockh, void *data,
114 __u64 *bits)
115 {
116 struct ldlm_lock *lock;
117 struct inode *new_inode = data;
118 ENTRY;
119
120 if(bits)
121 *bits = 0;
122
123 if (!*lockh)
124 RETURN(0);
125
126 lock = ldlm_handle2lock((struct lustre_handle *)lockh);
127
128 LASSERT(lock != NULL);
129 lock_res_and_lock(lock);
130 if (lock->l_resource->lr_lvb_inode &&
131 lock->l_resource->lr_lvb_inode != data) {
132 struct inode *old_inode = lock->l_resource->lr_lvb_inode;
133 LASSERTF(old_inode->i_state & I_FREEING,
134 "Found existing inode %p/%lu/%u state %lu in lock: "
135 "setting data to %p/%lu/%u\n", old_inode,
136 old_inode->i_ino, old_inode->i_generation,
137 old_inode->i_state,
138 new_inode, new_inode->i_ino, new_inode->i_generation);
139 }
140 lock->l_resource->lr_lvb_inode = new_inode;
141 if (bits)
142 *bits = lock->l_policy_data.l_inodebits.bits;
143
144 unlock_res_and_lock(lock);
145 LDLM_LOCK_PUT(lock);
146
147 RETURN(0);
148 }
149
150 ldlm_mode_t mdc_lock_match(struct obd_export *exp, __u64 flags,
151 const struct lu_fid *fid, ldlm_type_t type,
152 ldlm_policy_data_t *policy, ldlm_mode_t mode,
153 struct lustre_handle *lockh)
154 {
155 struct ldlm_res_id res_id;
156 ldlm_mode_t rc;
157 ENTRY;
158
159 fid_build_reg_res_name(fid, &res_id);
160 rc = ldlm_lock_match(class_exp2obd(exp)->obd_namespace, flags,
161 &res_id, type, policy, mode, lockh, 0);
162 RETURN(rc);
163 }
164
165 int mdc_cancel_unused(struct obd_export *exp,
166 const struct lu_fid *fid,
167 ldlm_policy_data_t *policy,
168 ldlm_mode_t mode,
169 ldlm_cancel_flags_t flags,
170 void *opaque)
171 {
172 struct ldlm_res_id res_id;
173 struct obd_device *obd = class_exp2obd(exp);
174 int rc;
175
176 ENTRY;
177
178 fid_build_reg_res_name(fid, &res_id);
179 rc = ldlm_cli_cancel_unused_resource(obd->obd_namespace, &res_id,
180 policy, mode, flags, opaque);
181 RETURN(rc);
182 }
183
184 int mdc_null_inode(struct obd_export *exp,
185 const struct lu_fid *fid)
186 {
187 struct ldlm_res_id res_id;
188 struct ldlm_resource *res;
189 struct ldlm_namespace *ns = class_exp2obd(exp)->obd_namespace;
190 ENTRY;
191
192 LASSERTF(ns != NULL, "no namespace passed\n");
193
194 fid_build_reg_res_name(fid, &res_id);
195
196 res = ldlm_resource_get(ns, NULL, &res_id, 0, 0);
197 if(res == NULL)
198 RETURN(0);
199
200 lock_res(res);
201 res->lr_lvb_inode = NULL;
202 unlock_res(res);
203
204 ldlm_resource_putref(res);
205 RETURN(0);
206 }
207
208 /* find any ldlm lock of the inode in mdc
209 * return 0 not find
210 * 1 find one
211 * < 0 error */
212 int mdc_find_cbdata(struct obd_export *exp,
213 const struct lu_fid *fid,
214 ldlm_iterator_t it, void *data)
215 {
216 struct ldlm_res_id res_id;
217 int rc = 0;
218 ENTRY;
219
220 fid_build_reg_res_name((struct lu_fid*)fid, &res_id);
221 rc = ldlm_resource_iterate(class_exp2obd(exp)->obd_namespace, &res_id,
222 it, data);
223 if (rc == LDLM_ITER_STOP)
224 RETURN(1);
225 else if (rc == LDLM_ITER_CONTINUE)
226 RETURN(0);
227 RETURN(rc);
228 }
229
230 static inline void mdc_clear_replay_flag(struct ptlrpc_request *req, int rc)
231 {
232 /* Don't hold error requests for replay. */
233 if (req->rq_replay) {
234 spin_lock(&req->rq_lock);
235 req->rq_replay = 0;
236 spin_unlock(&req->rq_lock);
237 }
238 if (rc && req->rq_transno != 0) {
239 DEBUG_REQ(D_ERROR, req, "transno returned on error rc %d", rc);
240 LBUG();
241 }
242 }
243
244 /* Save a large LOV EA into the request buffer so that it is available
245 * for replay. We don't do this in the initial request because the
246 * original request doesn't need this buffer (at most it sends just the
247 * lov_mds_md) and it is a waste of RAM/bandwidth to send the empty
248 * buffer and may also be difficult to allocate and save a very large
249 * request buffer for each open. (bug 5707)
250 *
251 * OOM here may cause recovery failure if lmm is needed (only for the
252 * original open if the MDS crashed just when this client also OOM'd)
253 * but this is incredibly unlikely, and questionable whether the client
254 * could do MDS recovery under OOM anyways... */
255 static void mdc_realloc_openmsg(struct ptlrpc_request *req,
256 struct mdt_body *body)
257 {
258 int rc;
259
260 /* FIXME: remove this explicit offset. */
261 rc = sptlrpc_cli_enlarge_reqbuf(req, DLM_INTENT_REC_OFF + 4,
262 body->eadatasize);
263 if (rc) {
264 CERROR("Can't enlarge segment %d size to %d\n",
265 DLM_INTENT_REC_OFF + 4, body->eadatasize);
266 body->valid &= ~OBD_MD_FLEASIZE;
267 body->eadatasize = 0;
268 }
269 }
270
271 static struct ptlrpc_request *mdc_intent_open_pack(struct obd_export *exp,
272 struct lookup_intent *it,
273 struct md_op_data *op_data,
274 void *lmm, int lmmsize,
275 void *cb_data)
276 {
277 struct ptlrpc_request *req;
278 struct obd_device *obddev = class_exp2obd(exp);
279 struct ldlm_intent *lit;
280 LIST_HEAD(cancels);
281 int count = 0;
282 int mode;
283 int rc;
284 ENTRY;
285
286 it->it_create_mode = (it->it_create_mode & ~S_IFMT) | S_IFREG;
287
288 /* XXX: openlock is not cancelled for cross-refs. */
289 /* If inode is known, cancel conflicting OPEN locks. */
290 if (fid_is_sane(&op_data->op_fid2)) {
291 if (it->it_flags & (FMODE_WRITE|MDS_OPEN_TRUNC))
292 mode = LCK_CW;
293 #ifdef FMODE_EXEC
294 else if (it->it_flags & FMODE_EXEC)
295 mode = LCK_PR;
296 #endif
297 else
298 mode = LCK_CR;
299 count = mdc_resource_get_unused(exp, &op_data->op_fid2,
300 &cancels, mode,
301 MDS_INODELOCK_OPEN);
302 }
303
304 /* If CREATE, cancel parent's UPDATE lock. */
305 if (it->it_op & IT_CREAT)
306 mode = LCK_EX;
307 else
308 mode = LCK_CR;
309 count += mdc_resource_get_unused(exp, &op_data->op_fid1,
310 &cancels, mode,
311 MDS_INODELOCK_UPDATE);
312
313 req = ptlrpc_request_alloc(class_exp2cliimp(exp),
314 &RQF_LDLM_INTENT_OPEN);
315 if (req == NULL) {
316 ldlm_lock_list_put(&cancels, l_bl_ast, count);
317 RETURN(ERR_PTR(-ENOMEM));
318 }
319
320 /* parent capability */
321 mdc_set_capa_size(req, &RMF_CAPA1, op_data->op_capa1);
322 /* child capability, reserve the size according to parent capa, it will
323 * be filled after we get the reply */
324 mdc_set_capa_size(req, &RMF_CAPA2, op_data->op_capa1);
325
326 req_capsule_set_size(&req->rq_pill, &RMF_NAME, RCL_CLIENT,
327 op_data->op_namelen + 1);
328 req_capsule_set_size(&req->rq_pill, &RMF_EADATA, RCL_CLIENT,
329 max(lmmsize, obddev->u.cli.cl_default_mds_easize));
330
331 rc = ldlm_prep_enqueue_req(exp, req, &cancels, count);
332 if (rc) {
333 ptlrpc_request_free(req);
334 return NULL;
335 }
336
337 spin_lock(&req->rq_lock);
338 req->rq_replay = req->rq_import->imp_replayable;
339 spin_unlock(&req->rq_lock);
340
341 /* pack the intent */
342 lit = req_capsule_client_get(&req->rq_pill, &RMF_LDLM_INTENT);
343 lit->opc = (__u64)it->it_op;
344
345 /* pack the intended request */
346 mdc_open_pack(req, op_data, it->it_create_mode, 0, it->it_flags, lmm,
347 lmmsize);
348
349 /* for remote client, fetch remote perm for current user */
350 if (client_is_remote(exp))
351 req_capsule_set_size(&req->rq_pill, &RMF_ACL, RCL_SERVER,
352 sizeof(struct mdt_remote_perm));
353 ptlrpc_request_set_replen(req);
354 return req;
355 }
356
357 static struct ptlrpc_request *mdc_intent_unlink_pack(struct obd_export *exp,
358 struct lookup_intent *it,
359 struct md_op_data *op_data)
360 {
361 struct ptlrpc_request *req;
362 struct obd_device *obddev = class_exp2obd(exp);
363 struct ldlm_intent *lit;
364 int rc;
365 ENTRY;
366
367 req = ptlrpc_request_alloc(class_exp2cliimp(exp),
368 &RQF_LDLM_INTENT_UNLINK);
369 if (req == NULL)
370 RETURN(ERR_PTR(-ENOMEM));
371
372 mdc_set_capa_size(req, &RMF_CAPA1, op_data->op_capa1);
373 req_capsule_set_size(&req->rq_pill, &RMF_NAME, RCL_CLIENT,
374 op_data->op_namelen + 1);
375
376 rc = ldlm_prep_enqueue_req(exp, req, NULL, 0);
377 if (rc) {
378 ptlrpc_request_free(req);
379 RETURN(ERR_PTR(rc));
380 }
381
382 /* pack the intent */
383 lit = req_capsule_client_get(&req->rq_pill, &RMF_LDLM_INTENT);
384 lit->opc = (__u64)it->it_op;
385
386 /* pack the intended request */
387 mdc_unlink_pack(req, op_data);
388
389 req_capsule_set_size(&req->rq_pill, &RMF_MDT_MD, RCL_SERVER,
390 obddev->u.cli.cl_max_mds_easize);
391 req_capsule_set_size(&req->rq_pill, &RMF_ACL, RCL_SERVER,
392 obddev->u.cli.cl_max_mds_cookiesize);
393 ptlrpc_request_set_replen(req);
394 RETURN(req);
395 }
396
397 static struct ptlrpc_request *mdc_intent_getattr_pack(struct obd_export *exp,
398 struct lookup_intent *it,
399 struct md_op_data *op_data)
400 {
401 struct ptlrpc_request *req;
402 struct obd_device *obddev = class_exp2obd(exp);
403 obd_valid valid = OBD_MD_FLGETATTR | OBD_MD_FLEASIZE |
404 OBD_MD_FLMODEASIZE | OBD_MD_FLDIREA |
405 OBD_MD_FLMDSCAPA | OBD_MD_MEA |
406 (client_is_remote(exp) ?
407 OBD_MD_FLRMTPERM : OBD_MD_FLACL);
408 struct ldlm_intent *lit;
409 int rc;
410 ENTRY;
411
412 req = ptlrpc_request_alloc(class_exp2cliimp(exp),
413 &RQF_LDLM_INTENT_GETATTR);
414 if (req == NULL)
415 RETURN(ERR_PTR(-ENOMEM));
416
417 mdc_set_capa_size(req, &RMF_CAPA1, op_data->op_capa1);
418 req_capsule_set_size(&req->rq_pill, &RMF_NAME, RCL_CLIENT,
419 op_data->op_namelen + 1);
420
421 rc = ldlm_prep_enqueue_req(exp, req, NULL, 0);
422 if (rc) {
423 ptlrpc_request_free(req);
424 RETURN(ERR_PTR(rc));
425 }
426
427 /* pack the intent */
428 lit = req_capsule_client_get(&req->rq_pill, &RMF_LDLM_INTENT);
429 lit->opc = (__u64)it->it_op;
430
431 /* pack the intended request */
432 mdc_getattr_pack(req, valid, it->it_flags, op_data,
433 obddev->u.cli.cl_max_mds_easize);
434
435 req_capsule_set_size(&req->rq_pill, &RMF_MDT_MD, RCL_SERVER,
436 obddev->u.cli.cl_max_mds_easize);
437 if (client_is_remote(exp))
438 req_capsule_set_size(&req->rq_pill, &RMF_ACL, RCL_SERVER,
439 sizeof(struct mdt_remote_perm));
440 ptlrpc_request_set_replen(req);
441 RETURN(req);
442 }
443
444 static struct ptlrpc_request *mdc_intent_layout_pack(struct obd_export *exp,
445 struct lookup_intent *it,
446 struct md_op_data *unused)
447 {
448 struct obd_device *obd = class_exp2obd(exp);
449 struct ptlrpc_request *req;
450 struct ldlm_intent *lit;
451 struct layout_intent *layout;
452 int rc;
453 ENTRY;
454
455 req = ptlrpc_request_alloc(class_exp2cliimp(exp),
456 &RQF_LDLM_INTENT_LAYOUT);
457 if (req == NULL)
458 RETURN(ERR_PTR(-ENOMEM));
459
460 req_capsule_set_size(&req->rq_pill, &RMF_EADATA, RCL_CLIENT, 0);
461 rc = ldlm_prep_enqueue_req(exp, req, NULL, 0);
462 if (rc) {
463 ptlrpc_request_free(req);
464 RETURN(ERR_PTR(rc));
465 }
466
467 /* pack the intent */
468 lit = req_capsule_client_get(&req->rq_pill, &RMF_LDLM_INTENT);
469 lit->opc = (__u64)it->it_op;
470
471 /* pack the layout intent request */
472 layout = req_capsule_client_get(&req->rq_pill, &RMF_LAYOUT_INTENT);
473 /* LAYOUT_INTENT_ACCESS is generic, specific operation will be
474 * set for replication */
475 layout->li_opc = LAYOUT_INTENT_ACCESS;
476
477 req_capsule_set_size(&req->rq_pill, &RMF_DLM_LVB, RCL_SERVER,
478 obd->u.cli.cl_max_mds_easize);
479 ptlrpc_request_set_replen(req);
480 RETURN(req);
481 }
482
483 static struct ptlrpc_request *
484 mdc_enqueue_pack(struct obd_export *exp, int lvb_len)
485 {
486 struct ptlrpc_request *req;
487 int rc;
488 ENTRY;
489
490 req = ptlrpc_request_alloc(class_exp2cliimp(exp), &RQF_LDLM_ENQUEUE);
491 if (req == NULL)
492 RETURN(ERR_PTR(-ENOMEM));
493
494 rc = ldlm_prep_enqueue_req(exp, req, NULL, 0);
495 if (rc) {
496 ptlrpc_request_free(req);
497 RETURN(ERR_PTR(rc));
498 }
499
500 req_capsule_set_size(&req->rq_pill, &RMF_DLM_LVB, RCL_SERVER, lvb_len);
501 ptlrpc_request_set_replen(req);
502 RETURN(req);
503 }
504
505 static int mdc_finish_enqueue(struct obd_export *exp,
506 struct ptlrpc_request *req,
507 struct ldlm_enqueue_info *einfo,
508 struct lookup_intent *it,
509 struct lustre_handle *lockh,
510 int rc)
511 {
512 struct req_capsule *pill = &req->rq_pill;
513 struct ldlm_request *lockreq;
514 struct ldlm_reply *lockrep;
515 struct lustre_intent_data *intent = &it->d.lustre;
516 struct ldlm_lock *lock;
517 void *lvb_data = NULL;
518 int lvb_len = 0;
519 ENTRY;
520
521 LASSERT(rc >= 0);
522 /* Similarly, if we're going to replay this request, we don't want to
523 * actually get a lock, just perform the intent. */
524 if (req->rq_transno || req->rq_replay) {
525 lockreq = req_capsule_client_get(pill, &RMF_DLM_REQ);
526 lockreq->lock_flags |= ldlm_flags_to_wire(LDLM_FL_INTENT_ONLY);
527 }
528
529 if (rc == ELDLM_LOCK_ABORTED) {
530 einfo->ei_mode = 0;
531 memset(lockh, 0, sizeof(*lockh));
532 rc = 0;
533 } else { /* rc = 0 */
534 lock = ldlm_handle2lock(lockh);
535 LASSERT(lock != NULL);
536
537 /* If the server gave us back a different lock mode, we should
538 * fix up our variables. */
539 if (lock->l_req_mode != einfo->ei_mode) {
540 ldlm_lock_addref(lockh, lock->l_req_mode);
541 ldlm_lock_decref(lockh, einfo->ei_mode);
542 einfo->ei_mode = lock->l_req_mode;
543 }
544 LDLM_LOCK_PUT(lock);
545 }
546
547 lockrep = req_capsule_server_get(pill, &RMF_DLM_REP);
548 LASSERT(lockrep != NULL); /* checked by ldlm_cli_enqueue() */
549
550 intent->it_disposition = (int)lockrep->lock_policy_res1;
551 intent->it_status = (int)lockrep->lock_policy_res2;
552 intent->it_lock_mode = einfo->ei_mode;
553 intent->it_lock_handle = lockh->cookie;
554 intent->it_data = req;
555
556 /* Technically speaking rq_transno must already be zero if
557 * it_status is in error, so the check is a bit redundant */
558 if ((!req->rq_transno || intent->it_status < 0) && req->rq_replay)
559 mdc_clear_replay_flag(req, intent->it_status);
560
561 /* If we're doing an IT_OPEN which did not result in an actual
562 * successful open, then we need to remove the bit which saves
563 * this request for unconditional replay.
564 *
565 * It's important that we do this first! Otherwise we might exit the
566 * function without doing so, and try to replay a failed create
567 * (bug 3440) */
568 if (it->it_op & IT_OPEN && req->rq_replay &&
569 (!it_disposition(it, DISP_OPEN_OPEN) ||intent->it_status != 0))
570 mdc_clear_replay_flag(req, intent->it_status);
571
572 DEBUG_REQ(D_RPCTRACE, req, "op: %d disposition: %x, status: %d",
573 it->it_op, intent->it_disposition, intent->it_status);
574
575 /* We know what to expect, so we do any byte flipping required here */
576 if (it->it_op & (IT_OPEN | IT_UNLINK | IT_LOOKUP | IT_GETATTR)) {
577 struct mdt_body *body;
578
579 body = req_capsule_server_get(pill, &RMF_MDT_BODY);
580 if (body == NULL) {
581 CERROR ("Can't swab mdt_body\n");
582 RETURN (-EPROTO);
583 }
584
585 if (it_disposition(it, DISP_OPEN_OPEN) &&
586 !it_open_error(DISP_OPEN_OPEN, it)) {
587 /*
588 * If this is a successful OPEN request, we need to set
589 * replay handler and data early, so that if replay
590 * happens immediately after swabbing below, new reply
591 * is swabbed by that handler correctly.
592 */
593 mdc_set_open_replay_data(NULL, NULL, req);
594 }
595
596 if ((body->valid & (OBD_MD_FLDIREA | OBD_MD_FLEASIZE)) != 0) {
597 void *eadata;
598
599 mdc_update_max_ea_from_body(exp, body);
600
601 /*
602 * The eadata is opaque; just check that it is there.
603 * Eventually, obd_unpackmd() will check the contents.
604 */
605 eadata = req_capsule_server_sized_get(pill, &RMF_MDT_MD,
606 body->eadatasize);
607 if (eadata == NULL)
608 RETURN(-EPROTO);
609
610 /* save lvb data and length in case this is for layout
611 * lock */
612 lvb_data = eadata;
613 lvb_len = body->eadatasize;
614
615 /*
616 * We save the reply LOV EA in case we have to replay a
617 * create for recovery. If we didn't allocate a large
618 * enough request buffer above we need to reallocate it
619 * here to hold the actual LOV EA.
620 *
621 * To not save LOV EA if request is not going to replay
622 * (for example error one).
623 */
624 if ((it->it_op & IT_OPEN) && req->rq_replay) {
625 void *lmm;
626 if (req_capsule_get_size(pill, &RMF_EADATA,
627 RCL_CLIENT) <
628 body->eadatasize)
629 mdc_realloc_openmsg(req, body);
630 else
631 req_capsule_shrink(pill, &RMF_EADATA,
632 body->eadatasize,
633 RCL_CLIENT);
634
635 req_capsule_set_size(pill, &RMF_EADATA,
636 RCL_CLIENT,
637 body->eadatasize);
638
639 lmm = req_capsule_client_get(pill, &RMF_EADATA);
640 if (lmm)
641 memcpy(lmm, eadata, body->eadatasize);
642 }
643 }
644
645 if (body->valid & OBD_MD_FLRMTPERM) {
646 struct mdt_remote_perm *perm;
647
648 LASSERT(client_is_remote(exp));
649 perm = req_capsule_server_swab_get(pill, &RMF_ACL,
650 lustre_swab_mdt_remote_perm);
651 if (perm == NULL)
652 RETURN(-EPROTO);
653 }
654 if (body->valid & OBD_MD_FLMDSCAPA) {
655 struct lustre_capa *capa, *p;
656
657 capa = req_capsule_server_get(pill, &RMF_CAPA1);
658 if (capa == NULL)
659 RETURN(-EPROTO);
660
661 if (it->it_op & IT_OPEN) {
662 /* client fid capa will be checked in replay */
663 p = req_capsule_client_get(pill, &RMF_CAPA2);
664 LASSERT(p);
665 *p = *capa;
666 }
667 }
668 if (body->valid & OBD_MD_FLOSSCAPA) {
669 struct lustre_capa *capa;
670
671 capa = req_capsule_server_get(pill, &RMF_CAPA2);
672 if (capa == NULL)
673 RETURN(-EPROTO);
674 }
675 } else if (it->it_op & IT_LAYOUT) {
676 /* maybe the lock was granted right away and layout
677 * is packed into RMF_DLM_LVB of req */
678 lvb_len = req_capsule_get_size(pill, &RMF_DLM_LVB, RCL_SERVER);
679 if (lvb_len > 0) {
680 lvb_data = req_capsule_server_sized_get(pill,
681 &RMF_DLM_LVB, lvb_len);
682 if (lvb_data == NULL)
683 RETURN(-EPROTO);
684 }
685 }
686
687 /* fill in stripe data for layout lock */
688 lock = ldlm_handle2lock(lockh);
689 if (lock != NULL && ldlm_has_layout(lock) && lvb_data != NULL) {
690 void *lmm;
691
692 LDLM_DEBUG(lock, "layout lock returned by: %s, lvb_len: %d\n",
693 ldlm_it2str(it->it_op), lvb_len);
694
695 OBD_ALLOC_LARGE(lmm, lvb_len);
696 if (lmm == NULL) {
697 LDLM_LOCK_PUT(lock);
698 RETURN(-ENOMEM);
699 }
700 memcpy(lmm, lvb_data, lvb_len);
701
702 /* install lvb_data */
703 lock_res_and_lock(lock);
704 if (lock->l_lvb_data == NULL) {
705 lock->l_lvb_data = lmm;
706 lock->l_lvb_len = lvb_len;
707 lmm = NULL;
708 }
709 unlock_res_and_lock(lock);
710 if (lmm != NULL)
711 OBD_FREE_LARGE(lmm, lvb_len);
712 }
713 if (lock != NULL)
714 LDLM_LOCK_PUT(lock);
715
716 RETURN(rc);
717 }
718
719 /* We always reserve enough space in the reply packet for a stripe MD, because
720 * we don't know in advance the file type. */
721 int mdc_enqueue(struct obd_export *exp, struct ldlm_enqueue_info *einfo,
722 struct lookup_intent *it, struct md_op_data *op_data,
723 struct lustre_handle *lockh, void *lmm, int lmmsize,
724 struct ptlrpc_request **reqp, __u64 extra_lock_flags)
725 {
726 struct obd_device *obddev = class_exp2obd(exp);
727 struct ptlrpc_request *req = NULL;
728 __u64 flags, saved_flags = extra_lock_flags;
729 int rc;
730 struct ldlm_res_id res_id;
731 static const ldlm_policy_data_t lookup_policy =
732 { .l_inodebits = { MDS_INODELOCK_LOOKUP } };
733 static const ldlm_policy_data_t update_policy =
734 { .l_inodebits = { MDS_INODELOCK_UPDATE } };
735 static const ldlm_policy_data_t layout_policy =
736 { .l_inodebits = { MDS_INODELOCK_LAYOUT } };
737 ldlm_policy_data_t const *policy = &lookup_policy;
738 int generation, resends = 0;
739 struct ldlm_reply *lockrep;
740 enum lvb_type lvb_type = 0;
741 ENTRY;
742
743 LASSERTF(!it || einfo->ei_type == LDLM_IBITS, "lock type %d\n",
744 einfo->ei_type);
745
746 fid_build_reg_res_name(&op_data->op_fid1, &res_id);
747
748 if (it) {
749 saved_flags |= LDLM_FL_HAS_INTENT;
750 if (it->it_op & (IT_UNLINK | IT_GETATTR | IT_READDIR))
751 policy = &update_policy;
752 else if (it->it_op & IT_LAYOUT)
753 policy = &layout_policy;
754 }
755
756 LASSERT(reqp == NULL);
757
758 generation = obddev->u.cli.cl_import->imp_generation;
759 resend:
760 flags = saved_flags;
761 if (!it) {
762 /* The only way right now is FLOCK, in this case we hide flock
763 policy as lmm, but lmmsize is 0 */
764 LASSERT(lmm && lmmsize == 0);
765 LASSERTF(einfo->ei_type == LDLM_FLOCK, "lock type %d\n",
766 einfo->ei_type);
767 policy = (ldlm_policy_data_t *)lmm;
768 res_id.name[3] = LDLM_FLOCK;
769 } else if (it->it_op & IT_OPEN) {
770 req = mdc_intent_open_pack(exp, it, op_data, lmm, lmmsize,
771 einfo->ei_cbdata);
772 policy = &update_policy;
773 einfo->ei_cbdata = NULL;
774 lmm = NULL;
775 } else if (it->it_op & IT_UNLINK) {
776 req = mdc_intent_unlink_pack(exp, it, op_data);
777 } else if (it->it_op & (IT_GETATTR | IT_LOOKUP)) {
778 req = mdc_intent_getattr_pack(exp, it, op_data);
779 } else if (it->it_op & IT_READDIR) {
780 req = mdc_enqueue_pack(exp, 0);
781 } else if (it->it_op & IT_LAYOUT) {
782 if (!imp_connect_lvb_type(class_exp2cliimp(exp)))
783 RETURN(-EOPNOTSUPP);
784
785 req = mdc_intent_layout_pack(exp, it, op_data);
786 lvb_type = LVB_T_LAYOUT;
787 } else {
788 LBUG();
789 RETURN(-EINVAL);
790 }
791
792 if (IS_ERR(req))
793 RETURN(PTR_ERR(req));
794
795 if (req != NULL && it && it->it_op & IT_CREAT)
796 /* ask ptlrpc not to resend on EINPROGRESS since we have our own
797 * retry logic */
798 req->rq_no_retry_einprogress = 1;
799
800 if (resends) {
801 req->rq_generation_set = 1;
802 req->rq_import_generation = generation;
803 req->rq_sent = cfs_time_current_sec() + resends;
804 }
805
806 /* It is important to obtain rpc_lock first (if applicable), so that
807 * threads that are serialised with rpc_lock are not polluting our
808 * rpcs in flight counter. We do not do flock request limiting, though*/
809 if (it) {
810 mdc_get_rpc_lock(obddev->u.cli.cl_rpc_lock, it);
811 rc = mdc_enter_request(&obddev->u.cli);
812 if (rc != 0) {
813 mdc_put_rpc_lock(obddev->u.cli.cl_rpc_lock, it);
814 mdc_clear_replay_flag(req, 0);
815 ptlrpc_req_finished(req);
816 RETURN(rc);
817 }
818 }
819
820 rc = ldlm_cli_enqueue(exp, &req, einfo, &res_id, policy, &flags, NULL,
821 0, lvb_type, lockh, 0);
822 if (!it) {
823 /* For flock requests we immediatelly return without further
824 delay and let caller deal with the rest, since rest of
825 this function metadata processing makes no sense for flock
826 requests anyway */
827 RETURN(rc);
828 }
829
830 mdc_exit_request(&obddev->u.cli);
831 mdc_put_rpc_lock(obddev->u.cli.cl_rpc_lock, it);
832
833 if (rc < 0) {
834 CERROR("ldlm_cli_enqueue: %d\n", rc);
835 mdc_clear_replay_flag(req, rc);
836 ptlrpc_req_finished(req);
837 RETURN(rc);
838 }
839
840 lockrep = req_capsule_server_get(&req->rq_pill, &RMF_DLM_REP);
841 LASSERT(lockrep != NULL);
842
843 /* Retry the create infinitely when we get -EINPROGRESS from
844 * server. This is required by the new quota design. */
845 if (it && it->it_op & IT_CREAT &&
846 (int)lockrep->lock_policy_res2 == -EINPROGRESS) {
847 mdc_clear_replay_flag(req, rc);
848 ptlrpc_req_finished(req);
849 resends++;
850
851 CDEBUG(D_HA, "%s: resend:%d op:%d "DFID"/"DFID"\n",
852 obddev->obd_name, resends, it->it_op,
853 PFID(&op_data->op_fid1), PFID(&op_data->op_fid2));
854
855 if (generation == obddev->u.cli.cl_import->imp_generation) {
856 goto resend;
857 } else {
858 CDEBUG(D_HA, "resend cross eviction\n");
859 RETURN(-EIO);
860 }
861 }
862
863 rc = mdc_finish_enqueue(exp, req, einfo, it, lockh, rc);
864 if (rc < 0) {
865 if (lustre_handle_is_used(lockh)) {
866 ldlm_lock_decref(lockh, einfo->ei_mode);
867 memset(lockh, 0, sizeof(*lockh));
868 }
869 ptlrpc_req_finished(req);
870 }
871 RETURN(rc);
872 }
873
874 static int mdc_finish_intent_lock(struct obd_export *exp,
875 struct ptlrpc_request *request,
876 struct md_op_data *op_data,
877 struct lookup_intent *it,
878 struct lustre_handle *lockh)
879 {
880 struct lustre_handle old_lock;
881 struct mdt_body *mdt_body;
882 struct ldlm_lock *lock;
883 int rc;
884
885
886 LASSERT(request != NULL);
887 LASSERT(request != LP_POISON);
888 LASSERT(request->rq_repmsg != LP_POISON);
889
890 if (!it_disposition(it, DISP_IT_EXECD)) {
891 /* The server failed before it even started executing the
892 * intent, i.e. because it couldn't unpack the request. */
893 LASSERT(it->d.lustre.it_status != 0);
894 RETURN(it->d.lustre.it_status);
895 }
896 rc = it_open_error(DISP_IT_EXECD, it);
897 if (rc)
898 RETURN(rc);
899
900 mdt_body = req_capsule_server_get(&request->rq_pill, &RMF_MDT_BODY);
901 LASSERT(mdt_body != NULL); /* mdc_enqueue checked */
902
903 /* If we were revalidating a fid/name pair, mark the intent in
904 * case we fail and get called again from lookup */
905 if (fid_is_sane(&op_data->op_fid2) &&
906 it->it_create_mode & M_CHECK_STALE &&
907 it->it_op != IT_GETATTR) {
908 it_set_disposition(it, DISP_ENQ_COMPLETE);
909
910 /* Also: did we find the same inode? */
911 /* sever can return one of two fids:
912 * op_fid2 - new allocated fid - if file is created.
913 * op_fid3 - existent fid - if file only open.
914 * op_fid3 is saved in lmv_intent_open */
915 if ((!lu_fid_eq(&op_data->op_fid2, &mdt_body->fid1)) &&
916 (!lu_fid_eq(&op_data->op_fid3, &mdt_body->fid1))) {
917 CDEBUG(D_DENTRY, "Found stale data "DFID"("DFID")/"DFID
918 "\n", PFID(&op_data->op_fid2),
919 PFID(&op_data->op_fid2), PFID(&mdt_body->fid1));
920 RETURN(-ESTALE);
921 }
922 }
923
924 rc = it_open_error(DISP_LOOKUP_EXECD, it);
925 if (rc)
926 RETURN(rc);
927
928 /* keep requests around for the multiple phases of the call
929 * this shows the DISP_XX must guarantee we make it into the call
930 */
931 if (!it_disposition(it, DISP_ENQ_CREATE_REF) &&
932 it_disposition(it, DISP_OPEN_CREATE) &&
933 !it_open_error(DISP_OPEN_CREATE, it)) {
934 it_set_disposition(it, DISP_ENQ_CREATE_REF);
935 ptlrpc_request_addref(request); /* balanced in ll_create_node */
936 }
937 if (!it_disposition(it, DISP_ENQ_OPEN_REF) &&
938 it_disposition(it, DISP_OPEN_OPEN) &&
939 !it_open_error(DISP_OPEN_OPEN, it)) {
940 it_set_disposition(it, DISP_ENQ_OPEN_REF);
941 ptlrpc_request_addref(request); /* balanced in ll_file_open */
942 /* BUG 11546 - eviction in the middle of open rpc processing */
943 OBD_FAIL_TIMEOUT(OBD_FAIL_MDC_ENQUEUE_PAUSE, obd_timeout);
944 }
945
946 if (it->it_op & IT_CREAT) {
947 /* XXX this belongs in ll_create_it */
948 } else if (it->it_op == IT_OPEN) {
949 LASSERT(!it_disposition(it, DISP_OPEN_CREATE));
950 } else {
951 LASSERT(it->it_op & (IT_GETATTR | IT_LOOKUP | IT_LAYOUT));
952 }
953
954 /* If we already have a matching lock, then cancel the new
955 * one. We have to set the data here instead of in
956 * mdc_enqueue, because we need to use the child's inode as
957 * the l_ast_data to match, and that's not available until
958 * intent_finish has performed the iget().) */
959 lock = ldlm_handle2lock(lockh);
960 if (lock) {
961 ldlm_policy_data_t policy = lock->l_policy_data;
962 LDLM_DEBUG(lock, "matching against this");
963
964 LASSERTF(fid_res_name_eq(&mdt_body->fid1,
965 &lock->l_resource->lr_name),
966 "Lock res_id: %lu/%lu/%lu, fid: %lu/%lu/%lu.\n",
967 (unsigned long)lock->l_resource->lr_name.name[0],
968 (unsigned long)lock->l_resource->lr_name.name[1],
969 (unsigned long)lock->l_resource->lr_name.name[2],
970 (unsigned long)fid_seq(&mdt_body->fid1),
971 (unsigned long)fid_oid(&mdt_body->fid1),
972 (unsigned long)fid_ver(&mdt_body->fid1));
973 LDLM_LOCK_PUT(lock);
974
975 memcpy(&old_lock, lockh, sizeof(*lockh));
976 if (ldlm_lock_match(NULL, LDLM_FL_BLOCK_GRANTED, NULL,
977 LDLM_IBITS, &policy, LCK_NL, &old_lock, 0)) {
978 ldlm_lock_decref_and_cancel(lockh,
979 it->d.lustre.it_lock_mode);
980 memcpy(lockh, &old_lock, sizeof(old_lock));
981 it->d.lustre.it_lock_handle = lockh->cookie;
982 }
983 }
984 CDEBUG(D_DENTRY,"D_IT dentry %.*s intent: %s status %d disp %x rc %d\n",
985 op_data->op_namelen, op_data->op_name, ldlm_it2str(it->it_op),
986 it->d.lustre.it_status, it->d.lustre.it_disposition, rc);
987 RETURN(rc);
988 }
989
990 int mdc_revalidate_lock(struct obd_export *exp, struct lookup_intent *it,
991 struct lu_fid *fid, __u64 *bits)
992 {
993 /* We could just return 1 immediately, but since we should only
994 * be called in revalidate_it if we already have a lock, let's
995 * verify that. */
996 struct ldlm_res_id res_id;
997 struct lustre_handle lockh;
998 ldlm_policy_data_t policy;
999 ldlm_mode_t mode;
1000 ENTRY;
1001
1002 if (it->d.lustre.it_lock_handle) {
1003 lockh.cookie = it->d.lustre.it_lock_handle;
1004 mode = ldlm_revalidate_lock_handle(&lockh, bits);
1005 } else {
1006 fid_build_reg_res_name(fid, &res_id);
1007 switch (it->it_op) {
1008 case IT_GETATTR:
1009 policy.l_inodebits.bits = MDS_INODELOCK_UPDATE;
1010 break;
1011 case IT_LAYOUT:
1012 policy.l_inodebits.bits = MDS_INODELOCK_LAYOUT;
1013 break;
1014 default:
1015 policy.l_inodebits.bits = MDS_INODELOCK_LOOKUP;
1016 break;
1017 }
1018 mode = ldlm_lock_match(exp->exp_obd->obd_namespace,
1019 LDLM_FL_BLOCK_GRANTED, &res_id,
1020 LDLM_IBITS, &policy,
1021 LCK_CR|LCK_CW|LCK_PR|LCK_PW, &lockh, 0);
1022 }
1023
1024 if (mode) {
1025 it->d.lustre.it_lock_handle = lockh.cookie;
1026 it->d.lustre.it_lock_mode = mode;
1027 } else {
1028 it->d.lustre.it_lock_handle = 0;
1029 it->d.lustre.it_lock_mode = 0;
1030 }
1031
1032 RETURN(!!mode);
1033 }
1034
1035 /*
1036 * This long block is all about fixing up the lock and request state
1037 * so that it is correct as of the moment _before_ the operation was
1038 * applied; that way, the VFS will think that everything is normal and
1039 * call Lustre's regular VFS methods.
1040 *
1041 * If we're performing a creation, that means that unless the creation
1042 * failed with EEXIST, we should fake up a negative dentry.
1043 *
1044 * For everything else, we want to lookup to succeed.
1045 *
1046 * One additional note: if CREATE or OPEN succeeded, we add an extra
1047 * reference to the request because we need to keep it around until
1048 * ll_create/ll_open gets called.
1049 *
1050 * The server will return to us, in it_disposition, an indication of
1051 * exactly what d.lustre.it_status refers to.
1052 *
1053 * If DISP_OPEN_OPEN is set, then d.lustre.it_status refers to the open() call,
1054 * otherwise if DISP_OPEN_CREATE is set, then it status is the
1055 * creation failure mode. In either case, one of DISP_LOOKUP_NEG or
1056 * DISP_LOOKUP_POS will be set, indicating whether the child lookup
1057 * was successful.
1058 *
1059 * Else, if DISP_LOOKUP_EXECD then d.lustre.it_status is the rc of the
1060 * child lookup.
1061 */
1062 int mdc_intent_lock(struct obd_export *exp, struct md_op_data *op_data,
1063 void *lmm, int lmmsize, struct lookup_intent *it,
1064 int lookup_flags, struct ptlrpc_request **reqp,
1065 ldlm_blocking_callback cb_blocking,
1066 __u64 extra_lock_flags)
1067 {
1068 struct lustre_handle lockh;
1069 int rc = 0;
1070 ENTRY;
1071 LASSERT(it);
1072
1073 CDEBUG(D_DLMTRACE, "(name: %.*s,"DFID") in obj "DFID
1074 ", intent: %s flags %#o\n", op_data->op_namelen,
1075 op_data->op_name, PFID(&op_data->op_fid2),
1076 PFID(&op_data->op_fid1), ldlm_it2str(it->it_op),
1077 it->it_flags);
1078
1079 lockh.cookie = 0;
1080 if (fid_is_sane(&op_data->op_fid2) &&
1081 (it->it_op & (IT_LOOKUP | IT_GETATTR))) {
1082 /* We could just return 1 immediately, but since we should only
1083 * be called in revalidate_it if we already have a lock, let's
1084 * verify that. */
1085 it->d.lustre.it_lock_handle = 0;
1086 rc = mdc_revalidate_lock(exp, it, &op_data->op_fid2, NULL);
1087 /* Only return failure if it was not GETATTR by cfid
1088 (from inode_revalidate) */
1089 if (rc || op_data->op_namelen != 0)
1090 RETURN(rc);
1091 }
1092
1093 /* lookup_it may be called only after revalidate_it has run, because
1094 * revalidate_it cannot return errors, only zero. Returning zero causes
1095 * this call to lookup, which *can* return an error.
1096 *
1097 * We only want to execute the request associated with the intent one
1098 * time, however, so don't send the request again. Instead, skip past
1099 * this and use the request from revalidate. In this case, revalidate
1100 * never dropped its reference, so the refcounts are all OK */
1101 if (!it_disposition(it, DISP_ENQ_COMPLETE)) {
1102 struct ldlm_enqueue_info einfo =
1103 { LDLM_IBITS, it_to_lock_mode(it), cb_blocking,
1104 ldlm_completion_ast, NULL, NULL, NULL };
1105
1106 /* For case if upper layer did not alloc fid, do it now. */
1107 if (!fid_is_sane(&op_data->op_fid2) && it->it_op & IT_CREAT) {
1108 rc = mdc_fid_alloc(exp, &op_data->op_fid2, op_data);
1109 if (rc < 0) {
1110 CERROR("Can't alloc new fid, rc %d\n", rc);
1111 RETURN(rc);
1112 }
1113 }
1114 rc = mdc_enqueue(exp, &einfo, it, op_data, &lockh,
1115 lmm, lmmsize, NULL, extra_lock_flags);
1116 if (rc < 0)
1117 RETURN(rc);
1118 } else if (!fid_is_sane(&op_data->op_fid2) ||
1119 !(it->it_create_mode & M_CHECK_STALE)) {
1120 /* DISP_ENQ_COMPLETE set means there is extra reference on
1121 * request referenced from this intent, saved for subsequent
1122 * lookup. This path is executed when we proceed to this
1123 * lookup, so we clear DISP_ENQ_COMPLETE */
1124 it_clear_disposition(it, DISP_ENQ_COMPLETE);
1125 }
1126 *reqp = it->d.lustre.it_data;
1127 rc = mdc_finish_intent_lock(exp, *reqp, op_data, it, &lockh);
1128 RETURN(rc);
1129 }
1130
1131 static int mdc_intent_getattr_async_interpret(const struct lu_env *env,
1132 struct ptlrpc_request *req,
1133 void *args, int rc)
1134 {
1135 struct mdc_getattr_args *ga = args;
1136 struct obd_export *exp = ga->ga_exp;
1137 struct md_enqueue_info *minfo = ga->ga_minfo;
1138 struct ldlm_enqueue_info *einfo = ga->ga_einfo;
1139 struct lookup_intent *it;
1140 struct lustre_handle *lockh;
1141 struct obd_device *obddev;
1142 __u64 flags = LDLM_FL_HAS_INTENT;
1143 ENTRY;
1144
1145 it = &minfo->mi_it;
1146 lockh = &minfo->mi_lockh;
1147
1148 obddev = class_exp2obd(exp);
1149
1150 mdc_exit_request(&obddev->u.cli);
1151 if (OBD_FAIL_CHECK(OBD_FAIL_MDC_GETATTR_ENQUEUE))
1152 rc = -ETIMEDOUT;
1153
1154 rc = ldlm_cli_enqueue_fini(exp, req, einfo->ei_type, 1, einfo->ei_mode,
1155 &flags, NULL, 0, lockh, rc);
1156 if (rc < 0) {
1157 CERROR("ldlm_cli_enqueue_fini: %d\n", rc);
1158 mdc_clear_replay_flag(req, rc);
1159 GOTO(out, rc);
1160 }
1161
1162 rc = mdc_finish_enqueue(exp, req, einfo, it, lockh, rc);
1163 if (rc)
1164 GOTO(out, rc);
1165
1166 rc = mdc_finish_intent_lock(exp, req, &minfo->mi_data, it, lockh);
1167 EXIT;
1168
1169 out:
1170 OBD_FREE_PTR(einfo);
1171 minfo->mi_cb(req, minfo, rc);
1172 return 0;
1173 }
1174
1175 int mdc_intent_getattr_async(struct obd_export *exp,
1176 struct md_enqueue_info *minfo,
1177 struct ldlm_enqueue_info *einfo)
1178 {
1179 struct md_op_data *op_data = &minfo->mi_data;
1180 struct lookup_intent *it = &minfo->mi_it;
1181 struct ptlrpc_request *req;
1182 struct mdc_getattr_args *ga;
1183 struct obd_device *obddev = class_exp2obd(exp);
1184 struct ldlm_res_id res_id;
1185 /*XXX: Both MDS_INODELOCK_LOOKUP and MDS_INODELOCK_UPDATE are needed
1186 * for statahead currently. Consider CMD in future, such two bits
1187 * maybe managed by different MDS, should be adjusted then. */
1188 ldlm_policy_data_t policy = {
1189 .l_inodebits = { MDS_INODELOCK_LOOKUP |
1190 MDS_INODELOCK_UPDATE }
1191 };
1192 int rc = 0;
1193 __u64 flags = LDLM_FL_HAS_INTENT;
1194 ENTRY;
1195
1196 CDEBUG(D_DLMTRACE,"name: %.*s in inode "DFID", intent: %s flags %#o\n",
1197 op_data->op_namelen, op_data->op_name, PFID(&op_data->op_fid1),
1198 ldlm_it2str(it->it_op), it->it_flags);
1199
1200 fid_build_reg_res_name(&op_data->op_fid1, &res_id);
1201 req = mdc_intent_getattr_pack(exp, it, op_data);
1202 if (!req)
1203 RETURN(-ENOMEM);
1204
1205 rc = mdc_enter_request(&obddev->u.cli);
1206 if (rc != 0) {
1207 ptlrpc_req_finished(req);
1208 RETURN(rc);
1209 }
1210
1211 rc = ldlm_cli_enqueue(exp, &req, einfo, &res_id, &policy, &flags, NULL,
1212 0, LVB_T_NONE, &minfo->mi_lockh, 1);
1213 if (rc < 0) {
1214 mdc_exit_request(&obddev->u.cli);
1215 ptlrpc_req_finished(req);
1216 RETURN(rc);
1217 }
1218
1219 CLASSERT(sizeof(*ga) <= sizeof(req->rq_async_args));
1220 ga = ptlrpc_req_async_args(req);
1221 ga->ga_exp = exp;
1222 ga->ga_minfo = minfo;
1223 ga->ga_einfo = einfo;
1224
1225 req->rq_interpret_reply = mdc_intent_getattr_async_interpret;
1226 ptlrpcd_add_req(req, PDL_POLICY_LOCAL, -1);
1227
1228 RETURN(0);
1229 }
Linux kernel - Deliverables
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