1 /* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
2 * vim:expandtab:shiftwidth=8:tabstop=8:
6 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License version 2 only,
10 * as published by the Free Software Foundation.
12 * This program is distributed in the hope that it will be useful, but
13 * WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * General Public License version 2 for more details (a copy is included
16 * in the LICENSE file that accompanied this code).
18 * You should have received a copy of the GNU General Public License
19 * version 2 along with this program; If not, see
20 * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
22 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
23 * CA 95054 USA or visit www.sun.com if you need additional information or
29 * Copyright (c) 2003, 2010, Oracle and/or its affiliates. All rights reserved.
30 * Use is subject to license terms.
33 * This file is part of Lustre, http://www.lustre.org/
34 * Lustre is a trademark of Sun Microsystems, Inc.
38 # define EXPORT_SYMTAB
40 #define DEBUG_SUBSYSTEM S_MDC
43 # include <linux/module.h>
44 # include <linux/pagemap.h>
45 # include <linux/miscdevice.h>
46 # include <linux/init.h>
48 # include <liblustre.h>
51 #include <lustre_acl.h>
52 #include <obd_class.h>
53 #include <lustre_dlm.h>
54 /* fid_res_name_eq() */
55 #include <lustre_fid.h>
56 #include <lprocfs_status.h>
57 #include "mdc_internal.h"
59 struct mdc_getattr_args {
60 struct obd_export *ga_exp;
61 struct md_enqueue_info *ga_minfo;
62 struct ldlm_enqueue_info *ga_einfo;
65 int it_disposition(struct lookup_intent *it, int flag)
67 return it->d.lustre.it_disposition & flag;
69 EXPORT_SYMBOL(it_disposition);
71 void it_set_disposition(struct lookup_intent *it, int flag)
73 it->d.lustre.it_disposition |= flag;
75 EXPORT_SYMBOL(it_set_disposition);
77 void it_clear_disposition(struct lookup_intent *it, int flag)
79 it->d.lustre.it_disposition &= ~flag;
81 EXPORT_SYMBOL(it_clear_disposition);
83 int it_open_error(int phase, struct lookup_intent *it)
85 if (it_disposition(it, DISP_OPEN_OPEN)) {
86 if (phase >= DISP_OPEN_OPEN)
87 return it->d.lustre.it_status;
92 if (it_disposition(it, DISP_OPEN_CREATE)) {
93 if (phase >= DISP_OPEN_CREATE)
94 return it->d.lustre.it_status;
99 if (it_disposition(it, DISP_LOOKUP_EXECD)) {
100 if (phase >= DISP_LOOKUP_EXECD)
101 return it->d.lustre.it_status;
106 if (it_disposition(it, DISP_IT_EXECD)) {
107 if (phase >= DISP_IT_EXECD)
108 return it->d.lustre.it_status;
112 CERROR("it disp: %X, status: %d\n", it->d.lustre.it_disposition,
113 it->d.lustre.it_status);
117 EXPORT_SYMBOL(it_open_error);
119 /* this must be called on a lockh that is known to have a referenced lock */
120 int mdc_set_lock_data(struct obd_export *exp, __u64 *lockh, void *data,
123 struct ldlm_lock *lock;
132 lock = ldlm_handle2lock((struct lustre_handle *)lockh);
134 LASSERT(lock != NULL);
135 lock_res_and_lock(lock);
137 if (lock->l_ast_data && lock->l_ast_data != data) {
138 struct inode *new_inode = data;
139 struct inode *old_inode = lock->l_ast_data;
140 LASSERTF(old_inode->i_state & I_FREEING,
141 "Found existing inode %p/%lu/%u state %lu in lock: "
142 "setting data to %p/%lu/%u\n", old_inode,
143 old_inode->i_ino, old_inode->i_generation,
145 new_inode, new_inode->i_ino, new_inode->i_generation);
148 lock->l_ast_data = data;
150 *bits = lock->l_policy_data.l_inodebits.bits;
152 unlock_res_and_lock(lock);
158 ldlm_mode_t mdc_lock_match(struct obd_export *exp, int flags,
159 const struct lu_fid *fid, ldlm_type_t type,
160 ldlm_policy_data_t *policy, ldlm_mode_t mode,
161 struct lustre_handle *lockh)
163 struct ldlm_res_id res_id;
167 fid_build_reg_res_name(fid, &res_id);
168 rc = ldlm_lock_match(class_exp2obd(exp)->obd_namespace, flags,
169 &res_id, type, policy, mode, lockh, 0);
173 int mdc_cancel_unused(struct obd_export *exp,
174 const struct lu_fid *fid,
175 ldlm_policy_data_t *policy,
177 ldlm_cancel_flags_t flags,
180 struct ldlm_res_id res_id;
181 struct obd_device *obd = class_exp2obd(exp);
186 fid_build_reg_res_name(fid, &res_id);
187 rc = ldlm_cli_cancel_unused_resource(obd->obd_namespace, &res_id,
188 policy, mode, flags, opaque);
192 int mdc_change_cbdata(struct obd_export *exp,
193 const struct lu_fid *fid,
194 ldlm_iterator_t it, void *data)
196 struct ldlm_res_id res_id;
199 fid_build_reg_res_name(fid, &res_id);
200 ldlm_resource_iterate(class_exp2obd(exp)->obd_namespace,
207 /* find any ldlm lock of the inode in mdc
211 int mdc_find_cbdata(struct obd_export *exp,
212 const struct lu_fid *fid,
213 ldlm_iterator_t it, void *data)
215 struct ldlm_res_id res_id;
219 fid_build_reg_res_name((struct lu_fid*)fid, &res_id);
220 rc = ldlm_resource_iterate(class_exp2obd(exp)->obd_namespace, &res_id,
222 if (rc == LDLM_ITER_STOP)
224 else if (rc == LDLM_ITER_CONTINUE)
229 static inline void mdc_clear_replay_flag(struct ptlrpc_request *req, int rc)
231 /* Don't hold error requests for replay. */
232 if (req->rq_replay) {
233 cfs_spin_lock(&req->rq_lock);
235 cfs_spin_unlock(&req->rq_lock);
237 if (rc && req->rq_transno != 0) {
238 DEBUG_REQ(D_ERROR, req, "transno returned on error rc %d", rc);
243 /* Save a large LOV EA into the request buffer so that it is available
244 * for replay. We don't do this in the initial request because the
245 * original request doesn't need this buffer (at most it sends just the
246 * lov_mds_md) and it is a waste of RAM/bandwidth to send the empty
247 * buffer and may also be difficult to allocate and save a very large
248 * request buffer for each open. (bug 5707)
250 * OOM here may cause recovery failure if lmm is needed (only for the
251 * original open if the MDS crashed just when this client also OOM'd)
252 * but this is incredibly unlikely, and questionable whether the client
253 * could do MDS recovery under OOM anyways... */
254 static void mdc_realloc_openmsg(struct ptlrpc_request *req,
255 struct mdt_body *body)
259 /* FIXME: remove this explicit offset. */
260 rc = sptlrpc_cli_enlarge_reqbuf(req, DLM_INTENT_REC_OFF + 4,
263 CERROR("Can't enlarge segment %d size to %d\n",
264 DLM_INTENT_REC_OFF + 4, body->eadatasize);
265 body->valid &= ~OBD_MD_FLEASIZE;
266 body->eadatasize = 0;
270 static struct ptlrpc_request *mdc_intent_open_pack(struct obd_export *exp,
271 struct lookup_intent *it,
272 struct md_op_data *op_data,
273 void *lmm, int lmmsize,
276 struct ptlrpc_request *req;
277 struct obd_device *obddev = class_exp2obd(exp);
278 struct ldlm_intent *lit;
279 CFS_LIST_HEAD(cancels);
285 it->it_create_mode = (it->it_create_mode & ~S_IFMT) | S_IFREG;
287 /* XXX: openlock is not cancelled for cross-refs. */
288 /* If inode is known, cancel conflicting OPEN locks. */
289 if (fid_is_sane(&op_data->op_fid2)) {
290 if (it->it_flags & (FMODE_WRITE|MDS_OPEN_TRUNC))
293 else if (it->it_flags & FMODE_EXEC)
298 count = mdc_resource_get_unused(exp, &op_data->op_fid2,
303 /* If CREATE, cancel parent's UPDATE lock. */
304 if (it->it_op & IT_CREAT)
308 count += mdc_resource_get_unused(exp, &op_data->op_fid1,
310 MDS_INODELOCK_UPDATE);
312 req = ptlrpc_request_alloc(class_exp2cliimp(exp),
313 &RQF_LDLM_INTENT_OPEN);
315 ldlm_lock_list_put(&cancels, l_bl_ast, count);
316 RETURN(ERR_PTR(-ENOMEM));
319 /* parent capability */
320 mdc_set_capa_size(req, &RMF_CAPA1, op_data->op_capa1);
321 /* child capability, reserve the size according to parent capa, it will
322 * be filled after we get the reply */
323 mdc_set_capa_size(req, &RMF_CAPA2, op_data->op_capa1);
325 req_capsule_set_size(&req->rq_pill, &RMF_NAME, RCL_CLIENT,
326 op_data->op_namelen + 1);
327 req_capsule_set_size(&req->rq_pill, &RMF_EADATA, RCL_CLIENT,
328 max(lmmsize, obddev->u.cli.cl_default_mds_easize));
330 rc = ldlm_prep_enqueue_req(exp, req, &cancels, count);
332 ptlrpc_request_free(req);
336 cfs_spin_lock(&req->rq_lock);
337 req->rq_replay = req->rq_import->imp_replayable;
338 cfs_spin_unlock(&req->rq_lock);
340 /* pack the intent */
341 lit = req_capsule_client_get(&req->rq_pill, &RMF_LDLM_INTENT);
342 lit->opc = (__u64)it->it_op;
344 /* pack the intended request */
345 mdc_open_pack(req, op_data, it->it_create_mode, 0, it->it_flags, lmm,
348 /* for remote client, fetch remote perm for current user */
349 if (client_is_remote(exp))
350 req_capsule_set_size(&req->rq_pill, &RMF_ACL, RCL_SERVER,
351 sizeof(struct mdt_remote_perm));
352 ptlrpc_request_set_replen(req);
356 static struct ptlrpc_request *mdc_intent_unlink_pack(struct obd_export *exp,
357 struct lookup_intent *it,
358 struct md_op_data *op_data)
360 struct ptlrpc_request *req;
361 struct obd_device *obddev = class_exp2obd(exp);
362 struct ldlm_intent *lit;
366 req = ptlrpc_request_alloc(class_exp2cliimp(exp),
367 &RQF_LDLM_INTENT_UNLINK);
369 RETURN(ERR_PTR(-ENOMEM));
371 mdc_set_capa_size(req, &RMF_CAPA1, op_data->op_capa1);
372 req_capsule_set_size(&req->rq_pill, &RMF_NAME, RCL_CLIENT,
373 op_data->op_namelen + 1);
375 rc = ldlm_prep_enqueue_req(exp, req, NULL, 0);
377 ptlrpc_request_free(req);
381 /* pack the intent */
382 lit = req_capsule_client_get(&req->rq_pill, &RMF_LDLM_INTENT);
383 lit->opc = (__u64)it->it_op;
385 /* pack the intended request */
386 mdc_unlink_pack(req, op_data);
388 req_capsule_set_size(&req->rq_pill, &RMF_MDT_MD, RCL_SERVER,
389 obddev->u.cli.cl_max_mds_easize);
390 req_capsule_set_size(&req->rq_pill, &RMF_ACL, RCL_SERVER,
391 obddev->u.cli.cl_max_mds_cookiesize);
392 ptlrpc_request_set_replen(req);
396 static struct ptlrpc_request *mdc_intent_getattr_pack(struct obd_export *exp,
397 struct lookup_intent *it,
398 struct md_op_data *op_data)
400 struct ptlrpc_request *req;
401 struct obd_device *obddev = class_exp2obd(exp);
402 obd_valid valid = OBD_MD_FLGETATTR | OBD_MD_FLEASIZE |
403 OBD_MD_FLMODEASIZE | OBD_MD_FLDIREA |
404 OBD_MD_FLMDSCAPA | OBD_MD_MEA |
405 (client_is_remote(exp) ?
406 OBD_MD_FLRMTPERM : OBD_MD_FLACL);
407 struct ldlm_intent *lit;
411 req = ptlrpc_request_alloc(class_exp2cliimp(exp),
412 &RQF_LDLM_INTENT_GETATTR);
414 RETURN(ERR_PTR(-ENOMEM));
416 mdc_set_capa_size(req, &RMF_CAPA1, op_data->op_capa1);
417 req_capsule_set_size(&req->rq_pill, &RMF_NAME, RCL_CLIENT,
418 op_data->op_namelen + 1);
420 rc = ldlm_prep_enqueue_req(exp, req, NULL, 0);
422 ptlrpc_request_free(req);
426 /* pack the intent */
427 lit = req_capsule_client_get(&req->rq_pill, &RMF_LDLM_INTENT);
428 lit->opc = (__u64)it->it_op;
430 /* pack the intended request */
431 mdc_getattr_pack(req, valid, it->it_flags, op_data,
432 obddev->u.cli.cl_max_mds_easize);
434 req_capsule_set_size(&req->rq_pill, &RMF_MDT_MD, RCL_SERVER,
435 obddev->u.cli.cl_max_mds_easize);
436 if (client_is_remote(exp))
437 req_capsule_set_size(&req->rq_pill, &RMF_ACL, RCL_SERVER,
438 sizeof(struct mdt_remote_perm));
439 ptlrpc_request_set_replen(req);
443 static struct ptlrpc_request *ldlm_enqueue_pack(struct obd_export *exp)
445 struct ptlrpc_request *req;
449 req = ptlrpc_request_alloc(class_exp2cliimp(exp), &RQF_LDLM_ENQUEUE);
451 RETURN(ERR_PTR(-ENOMEM));
453 rc = ldlm_prep_enqueue_req(exp, req, NULL, 0);
455 ptlrpc_request_free(req);
459 ptlrpc_request_set_replen(req);
463 static int mdc_finish_enqueue(struct obd_export *exp,
464 struct ptlrpc_request *req,
465 struct ldlm_enqueue_info *einfo,
466 struct lookup_intent *it,
467 struct lustre_handle *lockh,
470 struct req_capsule *pill = &req->rq_pill;
471 struct ldlm_request *lockreq;
472 struct ldlm_reply *lockrep;
476 /* Similarly, if we're going to replay this request, we don't want to
477 * actually get a lock, just perform the intent. */
478 if (req->rq_transno || req->rq_replay) {
479 lockreq = req_capsule_client_get(pill, &RMF_DLM_REQ);
480 lockreq->lock_flags |= LDLM_FL_INTENT_ONLY;
483 if (rc == ELDLM_LOCK_ABORTED) {
485 memset(lockh, 0, sizeof(*lockh));
487 } else { /* rc = 0 */
488 struct ldlm_lock *lock = ldlm_handle2lock(lockh);
491 /* If the server gave us back a different lock mode, we should
492 * fix up our variables. */
493 if (lock->l_req_mode != einfo->ei_mode) {
494 ldlm_lock_addref(lockh, lock->l_req_mode);
495 ldlm_lock_decref(lockh, einfo->ei_mode);
496 einfo->ei_mode = lock->l_req_mode;
501 lockrep = req_capsule_server_get(pill, &RMF_DLM_REP);
502 LASSERT(lockrep != NULL); /* checked by ldlm_cli_enqueue() */
504 it->d.lustre.it_disposition = (int)lockrep->lock_policy_res1;
505 it->d.lustre.it_status = (int)lockrep->lock_policy_res2;
506 it->d.lustre.it_lock_mode = einfo->ei_mode;
507 it->d.lustre.it_lock_handle = lockh->cookie;
508 it->d.lustre.it_data = req;
510 if (it->d.lustre.it_status < 0 && req->rq_replay)
511 mdc_clear_replay_flag(req, it->d.lustre.it_status);
513 /* If we're doing an IT_OPEN which did not result in an actual
514 * successful open, then we need to remove the bit which saves
515 * this request for unconditional replay.
517 * It's important that we do this first! Otherwise we might exit the
518 * function without doing so, and try to replay a failed create
520 if (it->it_op & IT_OPEN && req->rq_replay &&
521 (!it_disposition(it, DISP_OPEN_OPEN) ||it->d.lustre.it_status != 0))
522 mdc_clear_replay_flag(req, it->d.lustre.it_status);
524 DEBUG_REQ(D_RPCTRACE, req, "op: %d disposition: %x, status: %d",
525 it->it_op,it->d.lustre.it_disposition,it->d.lustre.it_status);
527 /* We know what to expect, so we do any byte flipping required here */
528 if (it->it_op & (IT_OPEN | IT_UNLINK | IT_LOOKUP | IT_GETATTR)) {
529 struct mdt_body *body;
531 body = req_capsule_server_get(pill, &RMF_MDT_BODY);
533 CERROR ("Can't swab mdt_body\n");
537 if (it_disposition(it, DISP_OPEN_OPEN) &&
538 !it_open_error(DISP_OPEN_OPEN, it)) {
540 * If this is a successful OPEN request, we need to set
541 * replay handler and data early, so that if replay
542 * happens immediately after swabbing below, new reply
543 * is swabbed by that handler correctly.
545 mdc_set_open_replay_data(NULL, NULL, req);
548 if ((body->valid & (OBD_MD_FLDIREA | OBD_MD_FLEASIZE)) != 0) {
551 mdc_update_max_ea_from_body(exp, body);
554 * The eadata is opaque; just check that it is there.
555 * Eventually, obd_unpackmd() will check the contents.
557 eadata = req_capsule_server_sized_get(pill, &RMF_MDT_MD,
563 * We save the reply LOV EA in case we have to replay a
564 * create for recovery. If we didn't allocate a large
565 * enough request buffer above we need to reallocate it
566 * here to hold the actual LOV EA.
568 * To not save LOV EA if request is not going to replay
569 * (for example error one).
571 if ((it->it_op & IT_OPEN) && req->rq_replay) {
573 if (req_capsule_get_size(pill, &RMF_EADATA,
576 mdc_realloc_openmsg(req, body);
578 req_capsule_shrink(pill, &RMF_EADATA,
582 req_capsule_set_size(pill, &RMF_EADATA,
586 lmm = req_capsule_client_get(pill, &RMF_EADATA);
588 memcpy(lmm, eadata, body->eadatasize);
592 if (body->valid & OBD_MD_FLRMTPERM) {
593 struct mdt_remote_perm *perm;
595 LASSERT(client_is_remote(exp));
596 perm = req_capsule_server_swab_get(pill, &RMF_ACL,
597 lustre_swab_mdt_remote_perm);
601 if (body->valid & OBD_MD_FLMDSCAPA) {
602 struct lustre_capa *capa, *p;
604 capa = req_capsule_server_get(pill, &RMF_CAPA1);
608 if (it->it_op & IT_OPEN) {
609 /* client fid capa will be checked in replay */
610 p = req_capsule_client_get(pill, &RMF_CAPA2);
615 if (body->valid & OBD_MD_FLOSSCAPA) {
616 struct lustre_capa *capa;
618 capa = req_capsule_server_get(pill, &RMF_CAPA2);
627 /* We always reserve enough space in the reply packet for a stripe MD, because
628 * we don't know in advance the file type. */
629 int mdc_enqueue(struct obd_export *exp, struct ldlm_enqueue_info *einfo,
630 struct lookup_intent *it, struct md_op_data *op_data,
631 struct lustre_handle *lockh, void *lmm, int lmmsize,
632 struct ptlrpc_request **reqp, int extra_lock_flags)
634 struct obd_device *obddev = class_exp2obd(exp);
635 struct ptlrpc_request *req = NULL;
636 struct req_capsule *pill;
637 int flags = extra_lock_flags;
639 struct ldlm_res_id res_id;
640 static const ldlm_policy_data_t lookup_policy =
641 { .l_inodebits = { MDS_INODELOCK_LOOKUP } };
642 static const ldlm_policy_data_t update_policy =
643 { .l_inodebits = { MDS_INODELOCK_UPDATE } };
644 ldlm_policy_data_t const *policy = &lookup_policy;
647 LASSERTF(!it || einfo->ei_type == LDLM_IBITS, "lock type %d\n",
650 fid_build_reg_res_name(&op_data->op_fid1, &res_id);
653 flags |= LDLM_FL_HAS_INTENT;
654 if (it && it->it_op & (IT_UNLINK | IT_GETATTR | IT_READDIR))
655 policy = &update_policy;
661 /* The only way right now is FLOCK, in this case we hide flock
662 policy as lmm, but lmmsize is 0 */
663 LASSERT(lmm && lmmsize == 0);
664 LASSERTF(einfo->ei_type == LDLM_FLOCK, "lock type %d\n",
666 policy = (ldlm_policy_data_t *)lmm;
667 res_id.name[3] = LDLM_FLOCK;
668 } else if (it->it_op & IT_OPEN) {
669 req = mdc_intent_open_pack(exp, it, op_data, lmm, lmmsize,
671 policy = &update_policy;
672 einfo->ei_cbdata = NULL;
674 } else if (it->it_op & IT_UNLINK)
675 req = mdc_intent_unlink_pack(exp, it, op_data);
676 else if (it->it_op & (IT_GETATTR | IT_LOOKUP))
677 req = mdc_intent_getattr_pack(exp, it, op_data);
678 else if (it->it_op == IT_READDIR)
679 req = ldlm_enqueue_pack(exp);
686 RETURN(PTR_ERR(req));
687 pill = &req->rq_pill;
689 /* It is important to obtain rpc_lock first (if applicable), so that
690 * threads that are serialised with rpc_lock are not polluting our
691 * rpcs in flight counter. We do not do flock request limiting, though*/
693 mdc_get_rpc_lock(obddev->u.cli.cl_rpc_lock, it);
694 rc = mdc_enter_request(&obddev->u.cli);
696 mdc_put_rpc_lock(obddev->u.cli.cl_rpc_lock, it);
697 ptlrpc_req_finished(req);
702 rc = ldlm_cli_enqueue(exp, &req, einfo, &res_id, policy, &flags, NULL,
708 mdc_exit_request(&obddev->u.cli);
709 mdc_put_rpc_lock(obddev->u.cli.cl_rpc_lock, it);
712 /* For flock requests we immediatelly return without further
713 delay and let caller deal with the rest, since rest of
714 this function metadata processing makes no sense for flock
720 CERROR("ldlm_cli_enqueue: %d\n", rc);
721 mdc_clear_replay_flag(req, rc);
722 ptlrpc_req_finished(req);
725 rc = mdc_finish_enqueue(exp, req, einfo, it, lockh, rc);
730 static int mdc_finish_intent_lock(struct obd_export *exp,
731 struct ptlrpc_request *request,
732 struct md_op_data *op_data,
733 struct lookup_intent *it,
734 struct lustre_handle *lockh)
736 struct lustre_handle old_lock;
737 struct mdt_body *mdt_body;
738 struct ldlm_lock *lock;
742 LASSERT(request != NULL);
743 LASSERT(request != LP_POISON);
744 LASSERT(request->rq_repmsg != LP_POISON);
746 if (!it_disposition(it, DISP_IT_EXECD)) {
747 /* The server failed before it even started executing the
748 * intent, i.e. because it couldn't unpack the request. */
749 LASSERT(it->d.lustre.it_status != 0);
750 RETURN(it->d.lustre.it_status);
752 rc = it_open_error(DISP_IT_EXECD, it);
756 mdt_body = req_capsule_server_get(&request->rq_pill, &RMF_MDT_BODY);
757 LASSERT(mdt_body != NULL); /* mdc_enqueue checked */
759 /* If we were revalidating a fid/name pair, mark the intent in
760 * case we fail and get called again from lookup */
761 if (fid_is_sane(&op_data->op_fid2) &&
762 it->it_create_mode & M_CHECK_STALE &&
763 it->it_op != IT_GETATTR) {
764 it_set_disposition(it, DISP_ENQ_COMPLETE);
766 /* Also: did we find the same inode? */
767 /* sever can return one of two fids:
768 * op_fid2 - new allocated fid - if file is created.
769 * op_fid3 - existent fid - if file only open.
770 * op_fid3 is saved in lmv_intent_open */
771 if ((!lu_fid_eq(&op_data->op_fid2, &mdt_body->fid1)) &&
772 (!lu_fid_eq(&op_data->op_fid3, &mdt_body->fid1))) {
773 CDEBUG(D_DENTRY, "Found stale data "DFID"("DFID")/"DFID
774 "\n", PFID(&op_data->op_fid2),
775 PFID(&op_data->op_fid2), PFID(&mdt_body->fid1));
780 rc = it_open_error(DISP_LOOKUP_EXECD, it);
784 /* keep requests around for the multiple phases of the call
785 * this shows the DISP_XX must guarantee we make it into the call
787 if (!it_disposition(it, DISP_ENQ_CREATE_REF) &&
788 it_disposition(it, DISP_OPEN_CREATE) &&
789 !it_open_error(DISP_OPEN_CREATE, it)) {
790 it_set_disposition(it, DISP_ENQ_CREATE_REF);
791 ptlrpc_request_addref(request); /* balanced in ll_create_node */
793 if (!it_disposition(it, DISP_ENQ_OPEN_REF) &&
794 it_disposition(it, DISP_OPEN_OPEN) &&
795 !it_open_error(DISP_OPEN_OPEN, it)) {
796 it_set_disposition(it, DISP_ENQ_OPEN_REF);
797 ptlrpc_request_addref(request); /* balanced in ll_file_open */
798 /* BUG 11546 - eviction in the middle of open rpc processing */
799 OBD_FAIL_TIMEOUT(OBD_FAIL_MDC_ENQUEUE_PAUSE, obd_timeout);
802 if (it->it_op & IT_CREAT) {
803 /* XXX this belongs in ll_create_it */
804 } else if (it->it_op == IT_OPEN) {
805 LASSERT(!it_disposition(it, DISP_OPEN_CREATE));
807 LASSERT(it->it_op & (IT_GETATTR | IT_LOOKUP));
810 /* If we already have a matching lock, then cancel the new
811 * one. We have to set the data here instead of in
812 * mdc_enqueue, because we need to use the child's inode as
813 * the l_ast_data to match, and that's not available until
814 * intent_finish has performed the iget().) */
815 lock = ldlm_handle2lock(lockh);
817 ldlm_policy_data_t policy = lock->l_policy_data;
818 LDLM_DEBUG(lock, "matching against this");
820 LASSERTF(fid_res_name_eq(&mdt_body->fid1,
821 &lock->l_resource->lr_name),
822 "Lock res_id: %lu/%lu/%lu, fid: %lu/%lu/%lu.\n",
823 (unsigned long)lock->l_resource->lr_name.name[0],
824 (unsigned long)lock->l_resource->lr_name.name[1],
825 (unsigned long)lock->l_resource->lr_name.name[2],
826 (unsigned long)fid_seq(&mdt_body->fid1),
827 (unsigned long)fid_oid(&mdt_body->fid1),
828 (unsigned long)fid_ver(&mdt_body->fid1));
831 memcpy(&old_lock, lockh, sizeof(*lockh));
832 if (ldlm_lock_match(NULL, LDLM_FL_BLOCK_GRANTED, NULL,
833 LDLM_IBITS, &policy, LCK_NL, &old_lock, 0)) {
834 ldlm_lock_decref_and_cancel(lockh,
835 it->d.lustre.it_lock_mode);
836 memcpy(lockh, &old_lock, sizeof(old_lock));
837 it->d.lustre.it_lock_handle = lockh->cookie;
840 CDEBUG(D_DENTRY,"D_IT dentry %.*s intent: %s status %d disp %x rc %d\n",
841 op_data->op_namelen, op_data->op_name, ldlm_it2str(it->it_op),
842 it->d.lustre.it_status, it->d.lustre.it_disposition, rc);
846 int mdc_revalidate_lock(struct obd_export *exp, struct lookup_intent *it,
849 /* We could just return 1 immediately, but since we should only
850 * be called in revalidate_it if we already have a lock, let's
852 struct ldlm_res_id res_id;
853 struct lustre_handle lockh;
854 ldlm_policy_data_t policy;
858 fid_build_reg_res_name(fid, &res_id);
859 policy.l_inodebits.bits = (it->it_op == IT_GETATTR) ?
860 MDS_INODELOCK_UPDATE : MDS_INODELOCK_LOOKUP;
862 mode = ldlm_lock_match(exp->exp_obd->obd_namespace,
863 LDLM_FL_BLOCK_GRANTED, &res_id, LDLM_IBITS,
864 &policy, LCK_CR|LCK_CW|LCK_PR|LCK_PW, &lockh, 0);
866 it->d.lustre.it_lock_handle = lockh.cookie;
867 it->d.lustre.it_lock_mode = mode;
874 * This long block is all about fixing up the lock and request state
875 * so that it is correct as of the moment _before_ the operation was
876 * applied; that way, the VFS will think that everything is normal and
877 * call Lustre's regular VFS methods.
879 * If we're performing a creation, that means that unless the creation
880 * failed with EEXIST, we should fake up a negative dentry.
882 * For everything else, we want to lookup to succeed.
884 * One additional note: if CREATE or OPEN succeeded, we add an extra
885 * reference to the request because we need to keep it around until
886 * ll_create/ll_open gets called.
888 * The server will return to us, in it_disposition, an indication of
889 * exactly what d.lustre.it_status refers to.
891 * If DISP_OPEN_OPEN is set, then d.lustre.it_status refers to the open() call,
892 * otherwise if DISP_OPEN_CREATE is set, then it status is the
893 * creation failure mode. In either case, one of DISP_LOOKUP_NEG or
894 * DISP_LOOKUP_POS will be set, indicating whether the child lookup
897 * Else, if DISP_LOOKUP_EXECD then d.lustre.it_status is the rc of the
900 int mdc_intent_lock(struct obd_export *exp, struct md_op_data *op_data,
901 void *lmm, int lmmsize, struct lookup_intent *it,
902 int lookup_flags, struct ptlrpc_request **reqp,
903 ldlm_blocking_callback cb_blocking,
904 int extra_lock_flags)
906 struct lustre_handle lockh;
911 CDEBUG(D_DLMTRACE, "(name: %.*s,"DFID") in obj "DFID
912 ", intent: %s flags %#o\n", op_data->op_namelen,
913 op_data->op_name, PFID(&op_data->op_fid2),
914 PFID(&op_data->op_fid1), ldlm_it2str(it->it_op),
918 if (fid_is_sane(&op_data->op_fid2) &&
919 (it->it_op & (IT_LOOKUP | IT_GETATTR))) {
920 /* We could just return 1 immediately, but since we should only
921 * be called in revalidate_it if we already have a lock, let's
923 rc = mdc_revalidate_lock(exp, it, &op_data->op_fid2);
924 /* Only return failure if it was not GETATTR by cfid
925 (from inode_revalidate) */
926 if (rc || op_data->op_namelen != 0)
930 /* lookup_it may be called only after revalidate_it has run, because
931 * revalidate_it cannot return errors, only zero. Returning zero causes
932 * this call to lookup, which *can* return an error.
934 * We only want to execute the request associated with the intent one
935 * time, however, so don't send the request again. Instead, skip past
936 * this and use the request from revalidate. In this case, revalidate
937 * never dropped its reference, so the refcounts are all OK */
938 if (!it_disposition(it, DISP_ENQ_COMPLETE)) {
939 struct ldlm_enqueue_info einfo =
940 { LDLM_IBITS, it_to_lock_mode(it), cb_blocking,
941 ldlm_completion_ast, NULL, NULL, NULL };
943 /* For case if upper layer did not alloc fid, do it now. */
944 if (!fid_is_sane(&op_data->op_fid2) && it->it_op & IT_CREAT) {
945 rc = mdc_fid_alloc(exp, &op_data->op_fid2, op_data);
947 CERROR("Can't alloc new fid, rc %d\n", rc);
951 rc = mdc_enqueue(exp, &einfo, it, op_data, &lockh,
952 lmm, lmmsize, NULL, extra_lock_flags);
955 } else if (!fid_is_sane(&op_data->op_fid2) ||
956 !(it->it_create_mode & M_CHECK_STALE)) {
957 /* DISP_ENQ_COMPLETE set means there is extra reference on
958 * request referenced from this intent, saved for subsequent
959 * lookup. This path is executed when we proceed to this
960 * lookup, so we clear DISP_ENQ_COMPLETE */
961 it_clear_disposition(it, DISP_ENQ_COMPLETE);
963 *reqp = it->d.lustre.it_data;
964 rc = mdc_finish_intent_lock(exp, *reqp, op_data, it, &lockh);
968 static int mdc_intent_getattr_async_interpret(const struct lu_env *env,
969 struct ptlrpc_request *req,
972 struct mdc_getattr_args *ga = args;
973 struct obd_export *exp = ga->ga_exp;
974 struct md_enqueue_info *minfo = ga->ga_minfo;
975 struct ldlm_enqueue_info *einfo = ga->ga_einfo;
976 struct lookup_intent *it;
977 struct lustre_handle *lockh;
978 struct obd_device *obddev;
979 int flags = LDLM_FL_HAS_INTENT;
983 lockh = &minfo->mi_lockh;
985 obddev = class_exp2obd(exp);
987 mdc_exit_request(&obddev->u.cli);
988 if (OBD_FAIL_CHECK(OBD_FAIL_MDC_GETATTR_ENQUEUE))
991 rc = ldlm_cli_enqueue_fini(exp, req, einfo->ei_type, 1, einfo->ei_mode,
992 &flags, NULL, 0, lockh, rc);
994 CERROR("ldlm_cli_enqueue_fini: %d\n", rc);
995 mdc_clear_replay_flag(req, rc);
999 rc = mdc_finish_enqueue(exp, req, einfo, it, lockh, rc);
1003 rc = mdc_finish_intent_lock(exp, req, &minfo->mi_data, it, lockh);
1007 OBD_FREE_PTR(einfo);
1008 minfo->mi_cb(req, minfo, rc);
1012 int mdc_intent_getattr_async(struct obd_export *exp,
1013 struct md_enqueue_info *minfo,
1014 struct ldlm_enqueue_info *einfo)
1016 struct md_op_data *op_data = &minfo->mi_data;
1017 struct lookup_intent *it = &minfo->mi_it;
1018 struct ptlrpc_request *req;
1019 struct mdc_getattr_args *ga;
1020 struct obd_device *obddev = class_exp2obd(exp);
1021 struct ldlm_res_id res_id;
1022 /*XXX: Both MDS_INODELOCK_LOOKUP and MDS_INODELOCK_UPDATE are needed
1023 * for statahead currently. Consider CMD in future, such two bits
1024 * maybe managed by different MDS, should be adjusted then. */
1025 ldlm_policy_data_t policy = {
1026 .l_inodebits = { MDS_INODELOCK_LOOKUP |
1027 MDS_INODELOCK_UPDATE }
1030 int flags = LDLM_FL_HAS_INTENT;
1033 CDEBUG(D_DLMTRACE,"name: %.*s in inode "DFID", intent: %s flags %#o\n",
1034 op_data->op_namelen, op_data->op_name, PFID(&op_data->op_fid1),
1035 ldlm_it2str(it->it_op), it->it_flags);
1037 fid_build_reg_res_name(&op_data->op_fid1, &res_id);
1038 req = mdc_intent_getattr_pack(exp, it, op_data);
1042 rc = mdc_enter_request(&obddev->u.cli);
1044 ptlrpc_req_finished(req);
1048 rc = ldlm_cli_enqueue(exp, &req, einfo, &res_id, &policy, &flags, NULL,
1049 0, &minfo->mi_lockh, 1);
1051 mdc_exit_request(&obddev->u.cli);
1052 ptlrpc_req_finished(req);
1056 CLASSERT(sizeof(*ga) <= sizeof(req->rq_async_args));
1057 ga = ptlrpc_req_async_args(req);
1059 ga->ga_minfo = minfo;
1060 ga->ga_einfo = einfo;
1062 req->rq_interpret_reply = mdc_intent_getattr_async_interpret;
1063 ptlrpcd_add_req(req, PDL_POLICY_LOCAL, -1);