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 2008 Sun Microsystems, Inc. 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 int it_disposition(struct lookup_intent *it, int flag)
61 return it->d.lustre.it_disposition & flag;
63 EXPORT_SYMBOL(it_disposition);
65 void it_set_disposition(struct lookup_intent *it, int flag)
67 it->d.lustre.it_disposition |= flag;
69 EXPORT_SYMBOL(it_set_disposition);
71 void it_clear_disposition(struct lookup_intent *it, int flag)
73 it->d.lustre.it_disposition &= ~flag;
75 EXPORT_SYMBOL(it_clear_disposition);
77 int it_open_error(int phase, struct lookup_intent *it)
79 if (it_disposition(it, DISP_OPEN_OPEN)) {
80 if (phase >= DISP_OPEN_OPEN)
81 return it->d.lustre.it_status;
86 if (it_disposition(it, DISP_OPEN_CREATE)) {
87 if (phase >= DISP_OPEN_CREATE)
88 return it->d.lustre.it_status;
93 if (it_disposition(it, DISP_LOOKUP_EXECD)) {
94 if (phase >= DISP_LOOKUP_EXECD)
95 return it->d.lustre.it_status;
100 if (it_disposition(it, DISP_IT_EXECD)) {
101 if (phase >= DISP_IT_EXECD)
102 return it->d.lustre.it_status;
106 CERROR("it disp: %X, status: %d\n", it->d.lustre.it_disposition,
107 it->d.lustre.it_status);
111 EXPORT_SYMBOL(it_open_error);
113 /* this must be called on a lockh that is known to have a referenced lock */
114 int mdc_set_lock_data(struct obd_export *exp, __u64 *lockh, void *data,
117 struct ldlm_lock *lock;
128 lock = ldlm_handle2lock((struct lustre_handle *)lockh);
130 LASSERT(lock != NULL);
131 lock_res_and_lock(lock);
133 if (lock->l_ast_data && lock->l_ast_data != data) {
134 struct inode *new_inode = data;
135 struct inode *old_inode = lock->l_ast_data;
136 LASSERTF(old_inode->i_state & I_FREEING,
137 "Found existing inode %p/%lu/%u state %lu in lock: "
138 "setting data to %p/%lu/%u\n", old_inode,
139 old_inode->i_ino, old_inode->i_generation,
141 new_inode, new_inode->i_ino, new_inode->i_generation);
144 lock->l_ast_data = data;
146 *bits = lock->l_policy_data.l_inodebits.bits;
148 unlock_res_and_lock(lock);
154 ldlm_mode_t mdc_lock_match(struct obd_export *exp, int flags,
155 const struct lu_fid *fid, ldlm_type_t type,
156 ldlm_policy_data_t *policy, ldlm_mode_t mode,
157 struct lustre_handle *lockh)
159 struct ldlm_res_id res_id;
163 fid_build_reg_res_name(fid, &res_id);
164 rc = ldlm_lock_match(class_exp2obd(exp)->obd_namespace, flags,
165 &res_id, type, policy, mode, lockh, 0);
169 int mdc_cancel_unused(struct obd_export *exp,
170 const struct lu_fid *fid,
171 ldlm_policy_data_t *policy,
172 ldlm_mode_t mode, int flags, void *opaque)
174 struct ldlm_res_id res_id;
175 struct obd_device *obd = class_exp2obd(exp);
180 fid_build_reg_res_name(fid, &res_id);
181 rc = ldlm_cli_cancel_unused_resource(obd->obd_namespace, &res_id,
182 policy, mode, flags, opaque);
186 int mdc_change_cbdata(struct obd_export *exp,
187 const struct lu_fid *fid,
188 ldlm_iterator_t it, void *data)
190 struct ldlm_res_id res_id;
193 fid_build_reg_res_name(fid, &res_id);
194 ldlm_resource_iterate(class_exp2obd(exp)->obd_namespace,
201 static inline void mdc_clear_replay_flag(struct ptlrpc_request *req, int rc)
203 /* Don't hold error requests for replay. */
204 if (req->rq_replay) {
205 spin_lock(&req->rq_lock);
207 spin_unlock(&req->rq_lock);
209 if (rc && req->rq_transno != 0) {
210 DEBUG_REQ(D_ERROR, req, "transno returned on error rc %d", rc);
215 /* Save a large LOV EA into the request buffer so that it is available
216 * for replay. We don't do this in the initial request because the
217 * original request doesn't need this buffer (at most it sends just the
218 * lov_mds_md) and it is a waste of RAM/bandwidth to send the empty
219 * buffer and may also be difficult to allocate and save a very large
220 * request buffer for each open. (bug 5707)
222 * OOM here may cause recovery failure if lmm is needed (only for the
223 * original open if the MDS crashed just when this client also OOM'd)
224 * but this is incredibly unlikely, and questionable whether the client
225 * could do MDS recovery under OOM anyways... */
226 static void mdc_realloc_openmsg(struct ptlrpc_request *req,
227 struct mdt_body *body)
231 /* FIXME: remove this explicit offset. */
232 rc = sptlrpc_cli_enlarge_reqbuf(req, DLM_INTENT_REC_OFF + 4,
235 CERROR("Can't enlarge segment %d size to %d\n",
236 DLM_INTENT_REC_OFF + 4, body->eadatasize);
237 body->valid &= ~OBD_MD_FLEASIZE;
238 body->eadatasize = 0;
242 static struct ptlrpc_request *mdc_intent_open_pack(struct obd_export *exp,
243 struct lookup_intent *it,
244 struct md_op_data *op_data,
245 void *lmm, int lmmsize,
248 struct ptlrpc_request *req;
249 struct obd_device *obddev = class_exp2obd(exp);
250 struct ldlm_intent *lit;
251 int joinfile = !!((it->it_create_mode & M_JOIN_FILE) &&
253 CFS_LIST_HEAD(cancels);
259 it->it_create_mode = (it->it_create_mode & ~S_IFMT) | S_IFREG;
261 /* XXX: openlock is not cancelled for cross-refs. */
262 /* If inode is known, cancel conflicting OPEN locks. */
263 if (fid_is_sane(&op_data->op_fid2)) {
264 if (it->it_flags & (FMODE_WRITE|MDS_OPEN_TRUNC))
267 else if (it->it_flags & FMODE_EXEC)
272 count = mdc_resource_get_unused(exp, &op_data->op_fid2,
277 /* If CREATE or JOIN_FILE, cancel parent's UPDATE lock. */
278 if (it->it_op & IT_CREAT || joinfile)
282 count += mdc_resource_get_unused(exp, &op_data->op_fid1,
284 MDS_INODELOCK_UPDATE);
286 req = ptlrpc_request_alloc(class_exp2cliimp(exp),
287 &RQF_LDLM_INTENT_OPEN);
289 ldlm_lock_list_put(&cancels, l_bl_ast, count);
290 RETURN(ERR_PTR(-ENOMEM));
293 /* parent capability */
294 mdc_set_capa_size(req, &RMF_CAPA1, op_data->op_capa1);
295 /* child capability, reserve the size according to parent capa, it will
296 * be filled after we get the reply */
297 mdc_set_capa_size(req, &RMF_CAPA2, op_data->op_capa1);
299 req_capsule_set_size(&req->rq_pill, &RMF_NAME, RCL_CLIENT,
300 op_data->op_namelen + 1);
301 req_capsule_set_size(&req->rq_pill, &RMF_EADATA, RCL_CLIENT,
302 max(lmmsize, obddev->u.cli.cl_default_mds_easize));
304 req_capsule_set_size(&req->rq_pill, &RMF_REC_JOINFILE,
308 rc = ldlm_prep_enqueue_req(exp, req, &cancels, count);
310 ptlrpc_request_free(req);
315 __u64 head_size = *(__u64 *)op_data->op_data;
316 mdc_join_pack(req, op_data, head_size);
319 spin_lock(&req->rq_lock);
320 req->rq_replay = req->rq_import->imp_replayable;
321 spin_unlock(&req->rq_lock);
323 /* pack the intent */
324 lit = req_capsule_client_get(&req->rq_pill, &RMF_LDLM_INTENT);
325 lit->opc = (__u64)it->it_op;
327 /* pack the intended request */
328 mdc_open_pack(req, op_data, it->it_create_mode, 0, it->it_flags, lmm,
331 /* for remote client, fetch remote perm for current user */
332 if (client_is_remote(exp))
333 req_capsule_set_size(&req->rq_pill, &RMF_ACL, RCL_SERVER,
334 sizeof(struct mdt_remote_perm));
335 ptlrpc_request_set_replen(req);
339 static struct ptlrpc_request *mdc_intent_unlink_pack(struct obd_export *exp,
340 struct lookup_intent *it,
341 struct md_op_data *op_data)
343 struct ptlrpc_request *req;
344 struct obd_device *obddev = class_exp2obd(exp);
345 struct ldlm_intent *lit;
349 req = ptlrpc_request_alloc(class_exp2cliimp(exp),
350 &RQF_LDLM_INTENT_UNLINK);
352 RETURN(ERR_PTR(-ENOMEM));
354 mdc_set_capa_size(req, &RMF_CAPA1, op_data->op_capa1);
355 req_capsule_set_size(&req->rq_pill, &RMF_NAME, RCL_CLIENT,
356 op_data->op_namelen + 1);
358 rc = ldlm_prep_enqueue_req(exp, req, NULL, 0);
360 ptlrpc_request_free(req);
364 /* pack the intent */
365 lit = req_capsule_client_get(&req->rq_pill, &RMF_LDLM_INTENT);
366 lit->opc = (__u64)it->it_op;
368 /* pack the intended request */
369 mdc_unlink_pack(req, op_data);
371 req_capsule_set_size(&req->rq_pill, &RMF_MDT_MD, RCL_SERVER,
372 obddev->u.cli.cl_max_mds_easize);
373 req_capsule_set_size(&req->rq_pill, &RMF_ACL, RCL_SERVER,
374 obddev->u.cli.cl_max_mds_cookiesize);
375 ptlrpc_request_set_replen(req);
379 static struct ptlrpc_request *mdc_intent_getattr_pack(struct obd_export *exp,
380 struct lookup_intent *it,
381 struct md_op_data *op_data)
383 struct ptlrpc_request *req;
384 struct obd_device *obddev = class_exp2obd(exp);
385 obd_valid valid = OBD_MD_FLGETATTR | OBD_MD_FLEASIZE |
386 OBD_MD_FLMODEASIZE | OBD_MD_FLDIREA |
387 OBD_MD_FLMDSCAPA | OBD_MD_MEA |
388 (client_is_remote(exp) ?
389 OBD_MD_FLRMTPERM : OBD_MD_FLACL);
390 struct ldlm_intent *lit;
394 req = ptlrpc_request_alloc(class_exp2cliimp(exp),
395 &RQF_LDLM_INTENT_GETATTR);
397 RETURN(ERR_PTR(-ENOMEM));
399 mdc_set_capa_size(req, &RMF_CAPA1, op_data->op_capa1);
400 req_capsule_set_size(&req->rq_pill, &RMF_NAME, RCL_CLIENT,
401 op_data->op_namelen + 1);
403 rc = ldlm_prep_enqueue_req(exp, req, NULL, 0);
405 ptlrpc_request_free(req);
409 /* pack the intent */
410 lit = req_capsule_client_get(&req->rq_pill, &RMF_LDLM_INTENT);
411 lit->opc = (__u64)it->it_op;
413 /* pack the intended request */
414 mdc_getattr_pack(req, valid, it->it_flags, op_data);
416 req_capsule_set_size(&req->rq_pill, &RMF_MDT_MD, RCL_SERVER,
417 obddev->u.cli.cl_max_mds_easize);
418 if (client_is_remote(exp))
419 req_capsule_set_size(&req->rq_pill, &RMF_ACL, RCL_SERVER,
420 sizeof(struct mdt_remote_perm));
421 ptlrpc_request_set_replen(req);
425 static struct ptlrpc_request *ldlm_enqueue_pack(struct obd_export *exp)
427 struct ptlrpc_request *req;
431 req = ptlrpc_request_alloc(class_exp2cliimp(exp), &RQF_LDLM_ENQUEUE);
433 RETURN(ERR_PTR(-ENOMEM));
435 rc = ldlm_prep_enqueue_req(exp, req, NULL, 0);
437 ptlrpc_request_free(req);
441 ptlrpc_request_set_replen(req);
445 static int mdc_finish_enqueue(struct obd_export *exp,
446 struct ptlrpc_request *req,
447 struct ldlm_enqueue_info *einfo,
448 struct lookup_intent *it,
449 struct lustre_handle *lockh,
452 struct req_capsule *pill = &req->rq_pill;
453 struct ldlm_request *lockreq;
454 struct ldlm_reply *lockrep;
458 /* Similarly, if we're going to replay this request, we don't want to
459 * actually get a lock, just perform the intent. */
460 if (req->rq_transno || req->rq_replay) {
461 lockreq = req_capsule_client_get(pill, &RMF_DLM_REQ);
462 lockreq->lock_flags |= LDLM_FL_INTENT_ONLY;
465 if (rc == ELDLM_LOCK_ABORTED) {
467 memset(lockh, 0, sizeof(*lockh));
469 } else { /* rc = 0 */
470 struct ldlm_lock *lock = ldlm_handle2lock(lockh);
473 /* If the server gave us back a different lock mode, we should
474 * fix up our variables. */
475 if (lock->l_req_mode != einfo->ei_mode) {
476 ldlm_lock_addref(lockh, lock->l_req_mode);
477 ldlm_lock_decref(lockh, einfo->ei_mode);
478 einfo->ei_mode = lock->l_req_mode;
483 lockrep = req_capsule_server_get(pill, &RMF_DLM_REP);
484 LASSERT(lockrep != NULL); /* checked by ldlm_cli_enqueue() */
486 it->d.lustre.it_disposition = (int)lockrep->lock_policy_res1;
487 it->d.lustre.it_status = (int)lockrep->lock_policy_res2;
488 it->d.lustre.it_lock_mode = einfo->ei_mode;
489 it->d.lustre.it_lock_handle = lockh->cookie;
490 it->d.lustre.it_data = req;
492 if (it->d.lustre.it_status < 0 && req->rq_replay)
493 mdc_clear_replay_flag(req, it->d.lustre.it_status);
495 /* If we're doing an IT_OPEN which did not result in an actual
496 * successful open, then we need to remove the bit which saves
497 * this request for unconditional replay.
499 * It's important that we do this first! Otherwise we might exit the
500 * function without doing so, and try to replay a failed create
502 if (it->it_op & IT_OPEN && req->rq_replay &&
503 (!it_disposition(it, DISP_OPEN_OPEN) ||it->d.lustre.it_status != 0))
504 mdc_clear_replay_flag(req, it->d.lustre.it_status);
506 DEBUG_REQ(D_RPCTRACE, req, "op: %d disposition: %x, status: %d",
507 it->it_op,it->d.lustre.it_disposition,it->d.lustre.it_status);
509 /* We know what to expect, so we do any byte flipping required here */
510 if (it->it_op & (IT_OPEN | IT_UNLINK | IT_LOOKUP | IT_GETATTR)) {
511 struct mdt_body *body;
513 body = req_capsule_server_get(pill, &RMF_MDT_BODY);
515 CERROR ("Can't swab mdt_body\n");
519 if (it_disposition(it, DISP_OPEN_OPEN) &&
520 !it_open_error(DISP_OPEN_OPEN, it)) {
522 * If this is a successful OPEN request, we need to set
523 * replay handler and data early, so that if replay
524 * happens immediately after swabbing below, new reply
525 * is swabbed by that handler correctly.
527 mdc_set_open_replay_data(NULL, NULL, req);
530 if ((body->valid & (OBD_MD_FLDIREA | OBD_MD_FLEASIZE)) != 0) {
534 * The eadata is opaque; just check that it is there.
535 * Eventually, obd_unpackmd() will check the contents.
537 eadata = req_capsule_server_sized_get(pill, &RMF_MDT_MD,
543 * We save the reply LOV EA in case we have to replay a
544 * create for recovery. If we didn't allocate a large
545 * enough request buffer above we need to reallocate it
546 * here to hold the actual LOV EA.
548 * To not save LOV EA if request is not going to replay
549 * (for example error one).
551 if ((it->it_op & IT_OPEN) && req->rq_replay) {
553 if (req_capsule_get_size(pill, &RMF_EADATA,
556 mdc_realloc_openmsg(req, body);
557 req_capsule_set_size(pill, &RMF_EADATA,
561 lmm = req_capsule_client_get(pill, &RMF_EADATA);
563 memcpy(lmm, eadata, body->eadatasize);
567 if (body->valid & OBD_MD_FLRMTPERM) {
568 struct mdt_remote_perm *perm;
570 LASSERT(client_is_remote(exp));
571 perm = req_capsule_server_swab_get(pill, &RMF_ACL,
572 lustre_swab_mdt_remote_perm);
576 if (body->valid & OBD_MD_FLMDSCAPA) {
577 struct lustre_capa *capa, *p;
579 capa = req_capsule_server_get(pill, &RMF_CAPA1);
583 if (it->it_op & IT_OPEN) {
584 /* client fid capa will be checked in replay */
585 p = req_capsule_client_get(pill, &RMF_CAPA2);
590 if (body->valid & OBD_MD_FLOSSCAPA) {
591 struct lustre_capa *capa;
593 capa = req_capsule_server_get(pill, &RMF_CAPA2);
602 /* We always reserve enough space in the reply packet for a stripe MD, because
603 * we don't know in advance the file type. */
604 int mdc_enqueue(struct obd_export *exp, struct ldlm_enqueue_info *einfo,
605 struct lookup_intent *it, struct md_op_data *op_data,
606 struct lustre_handle *lockh, void *lmm, int lmmsize,
607 struct ptlrpc_request **reqp, int extra_lock_flags)
609 struct obd_device *obddev = class_exp2obd(exp);
610 struct ptlrpc_request *req = NULL;
611 struct req_capsule *pill;
612 int flags = extra_lock_flags;
614 struct ldlm_res_id res_id;
615 ldlm_policy_data_t policy = { .l_inodebits = { MDS_INODELOCK_LOOKUP } };
618 LASSERTF(!it || einfo->ei_type == LDLM_IBITS, "lock type %d\n",
621 fid_build_reg_res_name(&op_data->op_fid1, &res_id);
624 flags |= LDLM_FL_HAS_INTENT;
625 if (it && it->it_op & (IT_UNLINK | IT_GETATTR | IT_READDIR))
626 policy.l_inodebits.bits = MDS_INODELOCK_UPDATE;
632 /* The only way right now is FLOCK, in this case we hide flock
633 policy as lmm, but lmmsize is 0 */
634 LASSERT(lmm && lmmsize == 0);
635 LASSERTF(einfo->ei_type == LDLM_FLOCK, "lock type %d\n",
637 policy = *(ldlm_policy_data_t *)lmm;
638 res_id.name[3] = LDLM_FLOCK;
639 } else if (it->it_op & IT_OPEN) {
640 int joinfile = !!((it->it_create_mode & M_JOIN_FILE) &&
643 req = mdc_intent_open_pack(exp, it, op_data, lmm, lmmsize,
646 policy.l_inodebits.bits = MDS_INODELOCK_UPDATE;
647 einfo->ei_cbdata = NULL;
650 it->it_create_mode &= ~M_JOIN_FILE;
651 } else if (it->it_op & IT_UNLINK)
652 req = mdc_intent_unlink_pack(exp, it, op_data);
653 else if (it->it_op & (IT_GETATTR | IT_LOOKUP))
654 req = mdc_intent_getattr_pack(exp, it, op_data);
655 else if (it->it_op == IT_READDIR)
656 req = ldlm_enqueue_pack(exp);
663 RETURN(PTR_ERR(req));
664 pill = &req->rq_pill;
666 /* It is important to obtain rpc_lock first (if applicable), so that
667 * threads that are serialised with rpc_lock are not polluting our
668 * rpcs in flight counter. We do not do flock request limiting, though*/
670 mdc_get_rpc_lock(obddev->u.cli.cl_rpc_lock, it);
671 mdc_enter_request(&obddev->u.cli);
673 rc = ldlm_cli_enqueue(exp, &req, einfo, &res_id, &policy, &flags, NULL,
679 mdc_exit_request(&obddev->u.cli);
680 mdc_put_rpc_lock(obddev->u.cli.cl_rpc_lock, it);
683 /* For flock requests we immediatelly return without further
684 delay and let caller deal with the rest, since rest of
685 this function metadata processing makes no sense for flock
691 CERROR("ldlm_cli_enqueue: %d\n", rc);
692 mdc_clear_replay_flag(req, rc);
693 ptlrpc_req_finished(req);
696 rc = mdc_finish_enqueue(exp, req, einfo, it, lockh, rc);
701 static int mdc_finish_intent_lock(struct obd_export *exp,
702 struct ptlrpc_request *request,
703 struct md_op_data *op_data,
704 struct lookup_intent *it,
705 struct lustre_handle *lockh)
707 struct lustre_handle old_lock;
708 struct mdt_body *mdt_body;
709 struct ldlm_lock *lock;
713 LASSERT(request != NULL);
714 LASSERT(request != LP_POISON);
715 LASSERT(request->rq_repmsg != LP_POISON);
717 if (!it_disposition(it, DISP_IT_EXECD)) {
718 /* The server failed before it even started executing the
719 * intent, i.e. because it couldn't unpack the request. */
720 LASSERT(it->d.lustre.it_status != 0);
721 RETURN(it->d.lustre.it_status);
723 rc = it_open_error(DISP_IT_EXECD, it);
727 mdt_body = req_capsule_server_get(&request->rq_pill, &RMF_MDT_BODY);
728 LASSERT(mdt_body != NULL); /* mdc_enqueue checked */
730 /* If we were revalidating a fid/name pair, mark the intent in
731 * case we fail and get called again from lookup */
732 if (fid_is_sane(&op_data->op_fid2) &&
733 it->it_create_mode & M_CHECK_STALE &&
734 it->it_op != IT_GETATTR) {
735 it_set_disposition(it, DISP_ENQ_COMPLETE);
737 /* Also: did we find the same inode? */
738 /* sever can return one of two fids:
739 * op_fid2 - new allocated fid - if file is created.
740 * op_fid3 - existent fid - if file only open.
741 * op_fid3 is saved in lmv_intent_open */
742 if ((!lu_fid_eq(&op_data->op_fid2, &mdt_body->fid1)) &&
743 (!lu_fid_eq(&op_data->op_fid3, &mdt_body->fid1))) {
744 CDEBUG(D_DENTRY, "Found stale data "DFID"("DFID")/"DFID
745 "\n", PFID(&op_data->op_fid2),
746 PFID(&op_data->op_fid2), PFID(&mdt_body->fid1));
751 rc = it_open_error(DISP_LOOKUP_EXECD, it);
755 /* keep requests around for the multiple phases of the call
756 * this shows the DISP_XX must guarantee we make it into the call
758 if (!it_disposition(it, DISP_ENQ_CREATE_REF) &&
759 it_disposition(it, DISP_OPEN_CREATE) &&
760 !it_open_error(DISP_OPEN_CREATE, it)) {
761 it_set_disposition(it, DISP_ENQ_CREATE_REF);
762 ptlrpc_request_addref(request); /* balanced in ll_create_node */
764 if (!it_disposition(it, DISP_ENQ_OPEN_REF) &&
765 it_disposition(it, DISP_OPEN_OPEN) &&
766 !it_open_error(DISP_OPEN_OPEN, it)) {
767 it_set_disposition(it, DISP_ENQ_OPEN_REF);
768 ptlrpc_request_addref(request); /* balanced in ll_file_open */
769 /* BUG 11546 - eviction in the middle of open rpc processing */
770 OBD_FAIL_TIMEOUT(OBD_FAIL_MDC_ENQUEUE_PAUSE, obd_timeout);
773 if (it->it_op & IT_CREAT) {
774 /* XXX this belongs in ll_create_it */
775 } else if (it->it_op == IT_OPEN) {
776 LASSERT(!it_disposition(it, DISP_OPEN_CREATE));
778 LASSERT(it->it_op & (IT_GETATTR | IT_LOOKUP));
781 /* If we already have a matching lock, then cancel the new
782 * one. We have to set the data here instead of in
783 * mdc_enqueue, because we need to use the child's inode as
784 * the l_ast_data to match, and that's not available until
785 * intent_finish has performed the iget().) */
786 lock = ldlm_handle2lock(lockh);
788 ldlm_policy_data_t policy = lock->l_policy_data;
789 LDLM_DEBUG(lock, "matching against this");
791 LASSERTF(fid_res_name_eq(&mdt_body->fid1,
792 &lock->l_resource->lr_name),
793 "Lock res_id: %lu/%lu/%lu, fid: %lu/%lu/%lu.\n",
794 (unsigned long)lock->l_resource->lr_name.name[0],
795 (unsigned long)lock->l_resource->lr_name.name[1],
796 (unsigned long)lock->l_resource->lr_name.name[2],
797 (unsigned long)fid_seq(&mdt_body->fid1),
798 (unsigned long)fid_oid(&mdt_body->fid1),
799 (unsigned long)fid_ver(&mdt_body->fid1));
802 memcpy(&old_lock, lockh, sizeof(*lockh));
803 if (ldlm_lock_match(NULL, LDLM_FL_BLOCK_GRANTED, NULL,
804 LDLM_IBITS, &policy, LCK_NL, &old_lock, 0)) {
805 ldlm_lock_decref_and_cancel(lockh,
806 it->d.lustre.it_lock_mode);
807 memcpy(lockh, &old_lock, sizeof(old_lock));
808 it->d.lustre.it_lock_handle = lockh->cookie;
811 CDEBUG(D_DENTRY,"D_IT dentry %.*s intent: %s status %d disp %x rc %d\n",
812 op_data->op_namelen, op_data->op_name, ldlm_it2str(it->it_op),
813 it->d.lustre.it_status, it->d.lustre.it_disposition, rc);
818 * This long block is all about fixing up the lock and request state
819 * so that it is correct as of the moment _before_ the operation was
820 * applied; that way, the VFS will think that everything is normal and
821 * call Lustre's regular VFS methods.
823 * If we're performing a creation, that means that unless the creation
824 * failed with EEXIST, we should fake up a negative dentry.
826 * For everything else, we want to lookup to succeed.
828 * One additional note: if CREATE or OPEN succeeded, we add an extra
829 * reference to the request because we need to keep it around until
830 * ll_create/ll_open gets called.
832 * The server will return to us, in it_disposition, an indication of
833 * exactly what d.lustre.it_status refers to.
835 * If DISP_OPEN_OPEN is set, then d.lustre.it_status refers to the open() call,
836 * otherwise if DISP_OPEN_CREATE is set, then it status is the
837 * creation failure mode. In either case, one of DISP_LOOKUP_NEG or
838 * DISP_LOOKUP_POS will be set, indicating whether the child lookup
841 * Else, if DISP_LOOKUP_EXECD then d.lustre.it_status is the rc of the
844 int mdc_intent_lock(struct obd_export *exp, struct md_op_data *op_data,
845 void *lmm, int lmmsize, struct lookup_intent *it,
846 int lookup_flags, struct ptlrpc_request **reqp,
847 ldlm_blocking_callback cb_blocking,
848 int extra_lock_flags)
850 struct lustre_handle lockh;
855 CDEBUG(D_DLMTRACE, "(name: %.*s,"DFID") in obj "DFID
856 ", intent: %s flags %#o\n", op_data->op_namelen,
857 op_data->op_name, PFID(&op_data->op_fid2),
858 PFID(&op_data->op_fid1), ldlm_it2str(it->it_op),
862 if (fid_is_sane(&op_data->op_fid2) &&
863 (it->it_op & (IT_LOOKUP | IT_GETATTR))) {
864 /* We could just return 1 immediately, but since we should only
865 * be called in revalidate_it if we already have a lock, let's
867 ldlm_policy_data_t policy;
870 /* As not all attributes are kept under update lock, e.g.
871 owner/group/acls are under lookup lock, we need both
872 ibits for GETATTR. */
874 /* For CMD, UPDATE lock and LOOKUP lock can not be got
875 * at the same for cross-object, so we can not match
876 * the 2 lock at the same time FIXME: but how to handle
877 * the above situation */
878 policy.l_inodebits.bits = (it->it_op == IT_GETATTR) ?
879 MDS_INODELOCK_UPDATE : MDS_INODELOCK_LOOKUP;
881 mode = mdc_lock_match(exp, LDLM_FL_BLOCK_GRANTED,
882 &op_data->op_fid2, LDLM_IBITS, &policy,
883 LCK_CR|LCK_CW|LCK_PR|LCK_PW, &lockh);
885 it->d.lustre.it_lock_handle = lockh.cookie;
886 it->d.lustre.it_lock_mode = mode;
889 /* Only return failure if it was not GETATTR by cfid
890 (from inode_revalidate) */
891 if (mode || op_data->op_namelen != 0)
895 /* lookup_it may be called only after revalidate_it has run, because
896 * revalidate_it cannot return errors, only zero. Returning zero causes
897 * this call to lookup, which *can* return an error.
899 * We only want to execute the request associated with the intent one
900 * time, however, so don't send the request again. Instead, skip past
901 * this and use the request from revalidate. In this case, revalidate
902 * never dropped its reference, so the refcounts are all OK */
903 if (!it_disposition(it, DISP_ENQ_COMPLETE)) {
904 struct ldlm_enqueue_info einfo =
905 { LDLM_IBITS, it_to_lock_mode(it), cb_blocking,
906 ldlm_completion_ast, NULL, NULL, NULL };
908 /* For case if upper layer did not alloc fid, do it now. */
909 if (!fid_is_sane(&op_data->op_fid2) && it->it_op & IT_CREAT) {
910 rc = mdc_fid_alloc(exp, &op_data->op_fid2, op_data);
912 CERROR("Can't alloc new fid, rc %d\n", rc);
916 rc = mdc_enqueue(exp, &einfo, it, op_data, &lockh,
917 lmm, lmmsize, NULL, extra_lock_flags);
920 } else if (!fid_is_sane(&op_data->op_fid2) ||
921 !(it->it_create_mode & M_CHECK_STALE)) {
922 /* DISP_ENQ_COMPLETE set means there is extra reference on
923 * request referenced from this intent, saved for subsequent
924 * lookup. This path is executed when we proceed to this
925 * lookup, so we clear DISP_ENQ_COMPLETE */
926 it_clear_disposition(it, DISP_ENQ_COMPLETE);
928 *reqp = it->d.lustre.it_data;
929 rc = mdc_finish_intent_lock(exp, *reqp, op_data, it, &lockh);
933 static int mdc_intent_getattr_async_interpret(const struct lu_env *env,
934 struct ptlrpc_request *req,
935 void *unused, int rc)
937 struct obd_export *exp = req->rq_async_args.pointer_arg[0];
938 struct md_enqueue_info *minfo = req->rq_async_args.pointer_arg[1];
939 struct ldlm_enqueue_info *einfo = req->rq_async_args.pointer_arg[2];
940 struct lookup_intent *it;
941 struct lustre_handle *lockh;
942 struct obd_device *obddev;
943 int flags = LDLM_FL_HAS_INTENT;
947 lockh = &minfo->mi_lockh;
949 obddev = class_exp2obd(exp);
951 mdc_exit_request(&obddev->u.cli);
952 if (OBD_FAIL_CHECK(OBD_FAIL_MDC_GETATTR_ENQUEUE))
955 rc = ldlm_cli_enqueue_fini(exp, req, einfo->ei_type, 1, einfo->ei_mode,
956 &flags, NULL, 0, NULL, lockh, rc);
958 CERROR("ldlm_cli_enqueue_fini: %d\n", rc);
959 mdc_clear_replay_flag(req, rc);
963 rc = mdc_finish_enqueue(exp, req, einfo, it, lockh, rc);
967 rc = mdc_finish_intent_lock(exp, req, &minfo->mi_data, it, lockh);
972 minfo->mi_cb(req, minfo, rc);
976 int mdc_intent_getattr_async(struct obd_export *exp,
977 struct md_enqueue_info *minfo,
978 struct ldlm_enqueue_info *einfo)
980 struct md_op_data *op_data = &minfo->mi_data;
981 struct lookup_intent *it = &minfo->mi_it;
982 struct ptlrpc_request *req;
983 struct obd_device *obddev = class_exp2obd(exp);
984 struct ldlm_res_id res_id;
985 ldlm_policy_data_t policy = {
986 .l_inodebits = { MDS_INODELOCK_LOOKUP }
989 int flags = LDLM_FL_HAS_INTENT;
992 CDEBUG(D_DLMTRACE,"name: %.*s in inode "DFID", intent: %s flags %#o\n",
993 op_data->op_namelen, op_data->op_name, PFID(&op_data->op_fid1),
994 ldlm_it2str(it->it_op), it->it_flags);
996 fid_build_reg_res_name(&op_data->op_fid1, &res_id);
997 req = mdc_intent_getattr_pack(exp, it, op_data);
1001 mdc_enter_request(&obddev->u.cli);
1002 rc = ldlm_cli_enqueue(exp, &req, einfo, &res_id, &policy, &flags, NULL,
1003 0, NULL, &minfo->mi_lockh, 1);
1005 mdc_exit_request(&obddev->u.cli);
1009 req->rq_async_args.pointer_arg[0] = exp;
1010 req->rq_async_args.pointer_arg[1] = minfo;
1011 req->rq_async_args.pointer_arg[2] = einfo;
1012 req->rq_interpret_reply = mdc_intent_getattr_async_interpret;
1013 ptlrpcd_add_req(req, PSCOPE_OTHER);
1018 int mdc_revalidate_lock(struct obd_export *exp,
1019 struct lookup_intent *it,
1022 /* We could just return 1 immediately, but since we should only
1023 * be called in revalidate_it if we already have a lock, let's
1025 struct ldlm_res_id res_id;
1026 struct lustre_handle lockh;
1027 ldlm_policy_data_t policy;
1031 fid_build_reg_res_name(fid, &res_id);
1032 /* As not all attributes are kept under update lock, e.g.
1033 owner/group/acls are under lookup lock, we need both
1034 ibits for GETATTR. */
1035 policy.l_inodebits.bits = (it->it_op == IT_GETATTR) ?
1036 MDS_INODELOCK_UPDATE | MDS_INODELOCK_LOOKUP :
1037 MDS_INODELOCK_LOOKUP;
1039 mode = ldlm_lock_match(exp->exp_obd->obd_namespace,
1040 LDLM_FL_BLOCK_GRANTED, &res_id, LDLM_IBITS,
1041 &policy, LCK_CR|LCK_CW|LCK_PR|LCK_PW, &lockh, 0);
1043 it->d.lustre.it_lock_handle = lockh.cookie;
1044 it->d.lustre.it_lock_mode = mode;