4 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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.
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).
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
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
27 * Copyright (c) 2003, 2010, Oracle and/or its affiliates. All rights reserved.
28 * Use is subject to license terms.
30 * Copyright (c) 2011, 2014, Intel Corporation.
33 * This file is part of Lustre, http://www.lustre.org/
34 * Lustre is a trademark of Sun Microsystems, Inc.
37 #define DEBUG_SUBSYSTEM S_MDC
39 #include <linux/module.h>
41 #include <obd_class.h>
42 #include <lustre_dlm.h>
43 #include <lustre_fid.h> /* fid_res_name_eq() */
44 #include <lustre_intent.h>
45 #include <lustre_mdc.h>
46 #include <lustre_net.h>
47 #include <lustre_req_layout.h>
48 #include "mdc_internal.h"
50 struct mdc_getattr_args {
51 struct obd_export *ga_exp;
52 struct md_enqueue_info *ga_minfo;
53 struct ldlm_enqueue_info *ga_einfo;
56 int it_open_error(int phase, struct lookup_intent *it)
58 if (it_disposition(it, DISP_OPEN_LEASE)) {
59 if (phase >= DISP_OPEN_LEASE)
60 return it->d.lustre.it_status;
64 if (it_disposition(it, DISP_OPEN_OPEN)) {
65 if (phase >= DISP_OPEN_OPEN)
66 return it->d.lustre.it_status;
71 if (it_disposition(it, DISP_OPEN_CREATE)) {
72 if (phase >= DISP_OPEN_CREATE)
73 return it->d.lustre.it_status;
78 if (it_disposition(it, DISP_LOOKUP_EXECD)) {
79 if (phase >= DISP_LOOKUP_EXECD)
80 return it->d.lustre.it_status;
85 if (it_disposition(it, DISP_IT_EXECD)) {
86 if (phase >= DISP_IT_EXECD)
87 return it->d.lustre.it_status;
91 CERROR("it disp: %X, status: %d\n", it->d.lustre.it_disposition,
92 it->d.lustre.it_status);
96 EXPORT_SYMBOL(it_open_error);
98 /* this must be called on a lockh that is known to have a referenced lock */
99 int mdc_set_lock_data(struct obd_export *exp, __u64 *lockh, void *data,
102 struct ldlm_lock *lock;
103 struct inode *new_inode = data;
112 lock = ldlm_handle2lock((struct lustre_handle *)lockh);
114 LASSERT(lock != NULL);
115 lock_res_and_lock(lock);
116 if (lock->l_resource->lr_lvb_inode &&
117 lock->l_resource->lr_lvb_inode != data) {
118 struct inode *old_inode = lock->l_resource->lr_lvb_inode;
119 LASSERTF(old_inode->i_state & I_FREEING,
120 "Found existing inode %p/%lu/%u state %lu in lock: "
121 "setting data to %p/%lu/%u\n", old_inode,
122 old_inode->i_ino, old_inode->i_generation,
124 new_inode, new_inode->i_ino, new_inode->i_generation);
126 lock->l_resource->lr_lvb_inode = new_inode;
128 *bits = lock->l_policy_data.l_inodebits.bits;
130 unlock_res_and_lock(lock);
136 ldlm_mode_t mdc_lock_match(struct obd_export *exp, __u64 flags,
137 const struct lu_fid *fid, ldlm_type_t type,
138 ldlm_policy_data_t *policy, ldlm_mode_t mode,
139 struct lustre_handle *lockh)
141 struct ldlm_res_id res_id;
145 fid_build_reg_res_name(fid, &res_id);
146 /* LU-4405: Clear bits not supported by server */
147 policy->l_inodebits.bits &= exp_connect_ibits(exp);
148 rc = ldlm_lock_match(class_exp2obd(exp)->obd_namespace, flags,
149 &res_id, type, policy, mode, lockh, 0);
153 int mdc_cancel_unused(struct obd_export *exp,
154 const struct lu_fid *fid,
155 ldlm_policy_data_t *policy,
157 ldlm_cancel_flags_t flags,
160 struct ldlm_res_id res_id;
161 struct obd_device *obd = class_exp2obd(exp);
166 fid_build_reg_res_name(fid, &res_id);
167 rc = ldlm_cli_cancel_unused_resource(obd->obd_namespace, &res_id,
168 policy, mode, flags, opaque);
172 int mdc_null_inode(struct obd_export *exp,
173 const struct lu_fid *fid)
175 struct ldlm_res_id res_id;
176 struct ldlm_resource *res;
177 struct ldlm_namespace *ns = class_exp2obd(exp)->obd_namespace;
180 LASSERTF(ns != NULL, "no namespace passed\n");
182 fid_build_reg_res_name(fid, &res_id);
184 res = ldlm_resource_get(ns, NULL, &res_id, 0, 0);
189 res->lr_lvb_inode = NULL;
192 ldlm_resource_putref(res);
196 /* find any ldlm lock of the inode in mdc
200 int mdc_find_cbdata(struct obd_export *exp,
201 const struct lu_fid *fid,
202 ldlm_iterator_t it, void *data)
204 struct ldlm_res_id res_id;
208 fid_build_reg_res_name((struct lu_fid*)fid, &res_id);
209 rc = ldlm_resource_iterate(class_exp2obd(exp)->obd_namespace, &res_id,
211 if (rc == LDLM_ITER_STOP)
213 else if (rc == LDLM_ITER_CONTINUE)
218 static inline void mdc_clear_replay_flag(struct ptlrpc_request *req, int rc)
220 /* Don't hold error requests for replay. */
221 if (req->rq_replay) {
222 spin_lock(&req->rq_lock);
224 spin_unlock(&req->rq_lock);
226 if (rc && req->rq_transno != 0) {
227 DEBUG_REQ(D_ERROR, req, "transno returned on error rc %d", rc);
232 /* Save a large LOV EA into the request buffer so that it is available
233 * for replay. We don't do this in the initial request because the
234 * original request doesn't need this buffer (at most it sends just the
235 * lov_mds_md) and it is a waste of RAM/bandwidth to send the empty
236 * buffer and may also be difficult to allocate and save a very large
237 * request buffer for each open. (bug 5707)
239 * OOM here may cause recovery failure if lmm is needed (only for the
240 * original open if the MDS crashed just when this client also OOM'd)
241 * but this is incredibly unlikely, and questionable whether the client
242 * could do MDS recovery under OOM anyways... */
243 static void mdc_realloc_openmsg(struct ptlrpc_request *req,
244 struct mdt_body *body)
248 /* FIXME: remove this explicit offset. */
249 rc = sptlrpc_cli_enlarge_reqbuf(req, DLM_INTENT_REC_OFF + 4,
250 body->mbo_eadatasize);
252 CERROR("Can't enlarge segment %d size to %d\n",
253 DLM_INTENT_REC_OFF + 4, body->mbo_eadatasize);
254 body->mbo_valid &= ~OBD_MD_FLEASIZE;
255 body->mbo_eadatasize = 0;
259 static struct ptlrpc_request *
260 mdc_intent_open_pack(struct obd_export *exp, struct lookup_intent *it,
261 struct md_op_data *op_data)
263 struct ptlrpc_request *req;
264 struct obd_device *obddev = class_exp2obd(exp);
265 struct ldlm_intent *lit;
266 const void *lmm = op_data->op_data;
267 __u32 lmmsize = op_data->op_data_size;
268 struct list_head cancels = LIST_HEAD_INIT(cancels);
274 it->it_create_mode = (it->it_create_mode & ~S_IFMT) | S_IFREG;
276 /* XXX: openlock is not cancelled for cross-refs. */
277 /* If inode is known, cancel conflicting OPEN locks. */
278 if (fid_is_sane(&op_data->op_fid2)) {
279 if (it->it_flags & MDS_OPEN_LEASE) { /* try to get lease */
280 if (it->it_flags & FMODE_WRITE)
285 if (it->it_flags & (FMODE_WRITE|MDS_OPEN_TRUNC))
288 else if (it->it_flags & FMODE_EXEC)
294 count = mdc_resource_get_unused(exp, &op_data->op_fid2,
299 /* If CREATE, cancel parent's UPDATE lock. */
300 if (it->it_op & IT_CREAT)
304 count += mdc_resource_get_unused(exp, &op_data->op_fid1,
306 MDS_INODELOCK_UPDATE);
308 req = ptlrpc_request_alloc(class_exp2cliimp(exp),
309 &RQF_LDLM_INTENT_OPEN);
311 ldlm_lock_list_put(&cancels, l_bl_ast, count);
312 RETURN(ERR_PTR(-ENOMEM));
315 req_capsule_set_size(&req->rq_pill, &RMF_NAME, RCL_CLIENT,
316 op_data->op_namelen + 1);
317 req_capsule_set_size(&req->rq_pill, &RMF_EADATA, RCL_CLIENT,
318 max(lmmsize, obddev->u.cli.cl_default_mds_easize));
320 rc = ldlm_prep_enqueue_req(exp, req, &cancels, count);
322 ptlrpc_request_free(req);
326 spin_lock(&req->rq_lock);
327 req->rq_replay = req->rq_import->imp_replayable;
328 spin_unlock(&req->rq_lock);
330 /* pack the intent */
331 lit = req_capsule_client_get(&req->rq_pill, &RMF_LDLM_INTENT);
332 lit->opc = (__u64)it->it_op;
334 /* pack the intended request */
335 mdc_open_pack(req, op_data, it->it_create_mode, 0, it->it_flags, lmm,
338 req_capsule_set_size(&req->rq_pill, &RMF_MDT_MD, RCL_SERVER,
339 obddev->u.cli.cl_max_mds_easize);
341 /* for remote client, fetch remote perm for current user */
342 if (client_is_remote(exp))
343 req_capsule_set_size(&req->rq_pill, &RMF_ACL, RCL_SERVER,
344 sizeof(struct mdt_remote_perm));
345 ptlrpc_request_set_replen(req);
349 static struct ptlrpc_request *
350 mdc_intent_getxattr_pack(struct obd_export *exp,
351 struct lookup_intent *it,
352 struct md_op_data *op_data)
354 struct ptlrpc_request *req;
355 struct ldlm_intent *lit;
358 struct list_head cancels = LIST_HEAD_INIT(cancels);
362 req = ptlrpc_request_alloc(class_exp2cliimp(exp),
363 &RQF_LDLM_INTENT_GETXATTR);
365 RETURN(ERR_PTR(-ENOMEM));
367 rc = ldlm_prep_enqueue_req(exp, req, &cancels, count);
369 ptlrpc_request_free(req);
373 /* pack the intent */
374 lit = req_capsule_client_get(&req->rq_pill, &RMF_LDLM_INTENT);
375 lit->opc = IT_GETXATTR;
377 maxdata = class_exp2cliimp(exp)->imp_connect_data.ocd_max_easize;
379 /* pack the intended request */
380 mdc_pack_body(req, &op_data->op_fid1, op_data->op_valid, maxdata, -1,
383 req_capsule_set_size(&req->rq_pill, &RMF_EADATA,
384 RCL_SERVER, maxdata);
386 req_capsule_set_size(&req->rq_pill, &RMF_EAVALS,
387 RCL_SERVER, maxdata);
389 req_capsule_set_size(&req->rq_pill, &RMF_EAVALS_LENS,
390 RCL_SERVER, maxdata);
392 ptlrpc_request_set_replen(req);
397 static struct ptlrpc_request *mdc_intent_unlink_pack(struct obd_export *exp,
398 struct lookup_intent *it,
399 struct md_op_data *op_data)
401 struct ptlrpc_request *req;
402 struct obd_device *obddev = class_exp2obd(exp);
403 struct ldlm_intent *lit;
407 req = ptlrpc_request_alloc(class_exp2cliimp(exp),
408 &RQF_LDLM_INTENT_UNLINK);
410 RETURN(ERR_PTR(-ENOMEM));
412 req_capsule_set_size(&req->rq_pill, &RMF_NAME, RCL_CLIENT,
413 op_data->op_namelen + 1);
415 rc = ldlm_prep_enqueue_req(exp, req, NULL, 0);
417 ptlrpc_request_free(req);
421 /* pack the intent */
422 lit = req_capsule_client_get(&req->rq_pill, &RMF_LDLM_INTENT);
423 lit->opc = (__u64)it->it_op;
425 /* pack the intended request */
426 mdc_unlink_pack(req, op_data);
428 req_capsule_set_size(&req->rq_pill, &RMF_MDT_MD, RCL_SERVER,
429 obddev->u.cli.cl_default_mds_easize);
430 ptlrpc_request_set_replen(req);
434 static struct ptlrpc_request *mdc_intent_getattr_pack(struct obd_export *exp,
435 struct lookup_intent *it,
436 struct md_op_data *op_data)
438 struct ptlrpc_request *req;
439 struct obd_device *obddev = class_exp2obd(exp);
440 u64 valid = OBD_MD_FLGETATTR | OBD_MD_FLEASIZE |
441 OBD_MD_FLMODEASIZE | OBD_MD_FLDIREA |
443 (client_is_remote(exp) ?
444 OBD_MD_FLRMTPERM : OBD_MD_FLACL);
445 struct ldlm_intent *lit;
450 req = ptlrpc_request_alloc(class_exp2cliimp(exp),
451 &RQF_LDLM_INTENT_GETATTR);
453 RETURN(ERR_PTR(-ENOMEM));
455 req_capsule_set_size(&req->rq_pill, &RMF_NAME, RCL_CLIENT,
456 op_data->op_namelen + 1);
458 rc = ldlm_prep_enqueue_req(exp, req, NULL, 0);
460 ptlrpc_request_free(req);
464 /* pack the intent */
465 lit = req_capsule_client_get(&req->rq_pill, &RMF_LDLM_INTENT);
466 lit->opc = (__u64)it->it_op;
468 if (obddev->u.cli.cl_default_mds_easize > 0)
469 easize = obddev->u.cli.cl_default_mds_easize;
471 easize = obddev->u.cli.cl_max_mds_easize;
473 /* pack the intended request */
474 mdc_getattr_pack(req, valid, it->it_flags, op_data, easize);
476 req_capsule_set_size(&req->rq_pill, &RMF_MDT_MD, RCL_SERVER, easize);
477 if (client_is_remote(exp))
478 req_capsule_set_size(&req->rq_pill, &RMF_ACL, RCL_SERVER,
479 sizeof(struct mdt_remote_perm));
480 ptlrpc_request_set_replen(req);
484 static struct ptlrpc_request *mdc_intent_layout_pack(struct obd_export *exp,
485 struct lookup_intent *it,
486 struct md_op_data *unused)
488 struct obd_device *obd = class_exp2obd(exp);
489 struct ptlrpc_request *req;
490 struct ldlm_intent *lit;
491 struct layout_intent *layout;
495 req = ptlrpc_request_alloc(class_exp2cliimp(exp),
496 &RQF_LDLM_INTENT_LAYOUT);
498 RETURN(ERR_PTR(-ENOMEM));
500 req_capsule_set_size(&req->rq_pill, &RMF_EADATA, RCL_CLIENT, 0);
501 rc = ldlm_prep_enqueue_req(exp, req, NULL, 0);
503 ptlrpc_request_free(req);
507 /* pack the intent */
508 lit = req_capsule_client_get(&req->rq_pill, &RMF_LDLM_INTENT);
509 lit->opc = (__u64)it->it_op;
511 /* pack the layout intent request */
512 layout = req_capsule_client_get(&req->rq_pill, &RMF_LAYOUT_INTENT);
513 /* LAYOUT_INTENT_ACCESS is generic, specific operation will be
514 * set for replication */
515 layout->li_opc = LAYOUT_INTENT_ACCESS;
517 req_capsule_set_size(&req->rq_pill, &RMF_DLM_LVB, RCL_SERVER,
518 obd->u.cli.cl_default_mds_easize);
519 ptlrpc_request_set_replen(req);
523 static struct ptlrpc_request *
524 mdc_enqueue_pack(struct obd_export *exp, int lvb_len)
526 struct ptlrpc_request *req;
530 req = ptlrpc_request_alloc(class_exp2cliimp(exp), &RQF_LDLM_ENQUEUE);
532 RETURN(ERR_PTR(-ENOMEM));
534 rc = ldlm_prep_enqueue_req(exp, req, NULL, 0);
536 ptlrpc_request_free(req);
540 req_capsule_set_size(&req->rq_pill, &RMF_DLM_LVB, RCL_SERVER, lvb_len);
541 ptlrpc_request_set_replen(req);
545 static int mdc_finish_enqueue(struct obd_export *exp,
546 struct ptlrpc_request *req,
547 struct ldlm_enqueue_info *einfo,
548 struct lookup_intent *it,
549 struct lustre_handle *lockh,
552 struct req_capsule *pill = &req->rq_pill;
553 struct ldlm_request *lockreq;
554 struct ldlm_reply *lockrep;
555 struct lustre_intent_data *intent = &it->d.lustre;
556 struct ldlm_lock *lock;
557 void *lvb_data = NULL;
562 /* Similarly, if we're going to replay this request, we don't want to
563 * actually get a lock, just perform the intent. */
564 if (req->rq_transno || req->rq_replay) {
565 lockreq = req_capsule_client_get(pill, &RMF_DLM_REQ);
566 lockreq->lock_flags |= ldlm_flags_to_wire(LDLM_FL_INTENT_ONLY);
569 if (rc == ELDLM_LOCK_ABORTED) {
571 memset(lockh, 0, sizeof(*lockh));
573 } else { /* rc = 0 */
574 lock = ldlm_handle2lock(lockh);
575 LASSERT(lock != NULL);
577 /* If the server gave us back a different lock mode, we should
578 * fix up our variables. */
579 if (lock->l_req_mode != einfo->ei_mode) {
580 ldlm_lock_addref(lockh, lock->l_req_mode);
581 ldlm_lock_decref(lockh, einfo->ei_mode);
582 einfo->ei_mode = lock->l_req_mode;
587 lockrep = req_capsule_server_get(pill, &RMF_DLM_REP);
588 LASSERT(lockrep != NULL); /* checked by ldlm_cli_enqueue() */
590 intent->it_disposition = (int)lockrep->lock_policy_res1;
591 intent->it_status = (int)lockrep->lock_policy_res2;
592 intent->it_lock_mode = einfo->ei_mode;
593 intent->it_lock_handle = lockh->cookie;
594 intent->it_data = req;
596 /* Technically speaking rq_transno must already be zero if
597 * it_status is in error, so the check is a bit redundant */
598 if ((!req->rq_transno || intent->it_status < 0) && req->rq_replay)
599 mdc_clear_replay_flag(req, intent->it_status);
601 /* If we're doing an IT_OPEN which did not result in an actual
602 * successful open, then we need to remove the bit which saves
603 * this request for unconditional replay.
605 * It's important that we do this first! Otherwise we might exit the
606 * function without doing so, and try to replay a failed create
608 if (it->it_op & IT_OPEN && req->rq_replay &&
609 (!it_disposition(it, DISP_OPEN_OPEN) ||intent->it_status != 0))
610 mdc_clear_replay_flag(req, intent->it_status);
612 DEBUG_REQ(D_RPCTRACE, req, "op: %d disposition: %x, status: %d",
613 it->it_op, intent->it_disposition, intent->it_status);
615 /* We know what to expect, so we do any byte flipping required here */
616 if (it->it_op & (IT_OPEN | IT_UNLINK | IT_LOOKUP | IT_GETATTR)) {
617 struct mdt_body *body;
619 body = req_capsule_server_get(pill, &RMF_MDT_BODY);
621 CERROR ("Can't swab mdt_body\n");
625 if (it_disposition(it, DISP_OPEN_OPEN) &&
626 !it_open_error(DISP_OPEN_OPEN, it)) {
628 * If this is a successful OPEN request, we need to set
629 * replay handler and data early, so that if replay
630 * happens immediately after swabbing below, new reply
631 * is swabbed by that handler correctly.
633 mdc_set_open_replay_data(NULL, NULL, it);
636 if (body->mbo_valid & (OBD_MD_FLDIREA | OBD_MD_FLEASIZE)) {
639 mdc_update_max_ea_from_body(exp, body);
642 * The eadata is opaque; just check that it is there.
643 * Eventually, obd_unpackmd() will check the contents.
645 eadata = req_capsule_server_sized_get(pill, &RMF_MDT_MD,
646 body->mbo_eadatasize);
650 /* save lvb data and length in case this is for layout
653 lvb_len = body->mbo_eadatasize;
656 * We save the reply LOV EA in case we have to replay a
657 * create for recovery. If we didn't allocate a large
658 * enough request buffer above we need to reallocate it
659 * here to hold the actual LOV EA.
661 * To not save LOV EA if request is not going to replay
662 * (for example error one).
664 if ((it->it_op & IT_OPEN) && req->rq_replay) {
666 if (req_capsule_get_size(pill, &RMF_EADATA,
668 body->mbo_eadatasize)
669 mdc_realloc_openmsg(req, body);
671 req_capsule_shrink(pill, &RMF_EADATA,
672 body->mbo_eadatasize,
675 req_capsule_set_size(pill, &RMF_EADATA,
677 body->mbo_eadatasize);
679 lmm = req_capsule_client_get(pill, &RMF_EADATA);
682 body->mbo_eadatasize);
686 if (body->mbo_valid & OBD_MD_FLRMTPERM) {
687 struct mdt_remote_perm *perm;
689 LASSERT(client_is_remote(exp));
690 perm = req_capsule_server_swab_get(pill, &RMF_ACL,
691 lustre_swab_mdt_remote_perm);
695 } else if (it->it_op & IT_LAYOUT) {
696 /* maybe the lock was granted right away and layout
697 * is packed into RMF_DLM_LVB of req */
698 lvb_len = req_capsule_get_size(pill, &RMF_DLM_LVB, RCL_SERVER);
700 lvb_data = req_capsule_server_sized_get(pill,
701 &RMF_DLM_LVB, lvb_len);
702 if (lvb_data == NULL)
707 /* fill in stripe data for layout lock.
708 * LU-6581: trust layout data only if layout lock is granted. The MDT
709 * has stopped sending layout unless the layout lock is granted. The
710 * client still does this checking in case it's talking with an old
711 * server. - Jinshan */
712 lock = ldlm_handle2lock(lockh);
713 if (lock != NULL && ldlm_has_layout(lock) && lvb_data != NULL &&
714 !(lockrep->lock_flags & LDLM_FL_BLOCKED_MASK)) {
717 LDLM_DEBUG(lock, "layout lock returned by: %s, lvb_len: %d\n",
718 ldlm_it2str(it->it_op), lvb_len);
720 OBD_ALLOC_LARGE(lmm, lvb_len);
725 memcpy(lmm, lvb_data, lvb_len);
727 /* install lvb_data */
728 lock_res_and_lock(lock);
729 if (lock->l_lvb_data == NULL) {
730 lock->l_lvb_type = LVB_T_LAYOUT;
731 lock->l_lvb_data = lmm;
732 lock->l_lvb_len = lvb_len;
735 unlock_res_and_lock(lock);
737 OBD_FREE_LARGE(lmm, lvb_len);
745 /* We always reserve enough space in the reply packet for a stripe MD, because
746 * we don't know in advance the file type. */
747 int mdc_enqueue(struct obd_export *exp,
748 struct ldlm_enqueue_info *einfo,
749 const union ldlm_policy_data *policy,
750 struct lookup_intent *it, struct md_op_data *op_data,
751 struct lustre_handle *lockh, __u64 extra_lock_flags)
753 struct obd_device *obddev = class_exp2obd(exp);
754 struct ptlrpc_request *req = NULL;
755 __u64 flags, saved_flags = extra_lock_flags;
757 struct ldlm_res_id res_id;
758 static const ldlm_policy_data_t lookup_policy =
759 { .l_inodebits = { MDS_INODELOCK_LOOKUP } };
760 static const ldlm_policy_data_t update_policy =
761 { .l_inodebits = { MDS_INODELOCK_UPDATE } };
762 static const ldlm_policy_data_t layout_policy =
763 { .l_inodebits = { MDS_INODELOCK_LAYOUT } };
764 static const ldlm_policy_data_t getxattr_policy = {
765 .l_inodebits = { MDS_INODELOCK_XATTR } };
766 int generation, resends = 0;
767 struct ldlm_reply *lockrep;
768 enum lvb_type lvb_type = 0;
771 LASSERTF(!it || einfo->ei_type == LDLM_IBITS, "lock type %d\n",
773 fid_build_reg_res_name(&op_data->op_fid1, &res_id);
776 LASSERT(policy == NULL);
778 saved_flags |= LDLM_FL_HAS_INTENT;
779 if (it->it_op & (IT_OPEN | IT_UNLINK | IT_GETATTR | IT_READDIR))
780 policy = &update_policy;
781 else if (it->it_op & IT_LAYOUT)
782 policy = &layout_policy;
783 else if (it->it_op & (IT_GETXATTR | IT_SETXATTR))
784 policy = &getxattr_policy;
786 policy = &lookup_policy;
789 generation = obddev->u.cli.cl_import->imp_generation;
793 /* The only way right now is FLOCK. */
794 LASSERTF(einfo->ei_type == LDLM_FLOCK, "lock type %d\n",
796 res_id.name[3] = LDLM_FLOCK;
797 } else if (it->it_op & IT_OPEN) {
798 req = mdc_intent_open_pack(exp, it, op_data);
799 } else if (it->it_op & IT_UNLINK) {
800 req = mdc_intent_unlink_pack(exp, it, op_data);
801 } else if (it->it_op & (IT_GETATTR | IT_LOOKUP)) {
802 req = mdc_intent_getattr_pack(exp, it, op_data);
803 } else if (it->it_op & IT_READDIR) {
804 req = mdc_enqueue_pack(exp, 0);
805 } else if (it->it_op & IT_LAYOUT) {
806 if (!imp_connect_lvb_type(class_exp2cliimp(exp)))
808 req = mdc_intent_layout_pack(exp, it, op_data);
809 lvb_type = LVB_T_LAYOUT;
810 } else if (it->it_op & IT_GETXATTR) {
811 req = mdc_intent_getxattr_pack(exp, it, op_data);
818 RETURN(PTR_ERR(req));
821 req->rq_generation_set = 1;
822 req->rq_import_generation = generation;
823 req->rq_sent = cfs_time_current_sec() + resends;
826 /* It is important to obtain modify RPC slot first (if applicable), so
827 * that threads that are waiting for a modify RPC slot are not polluting
828 * our rpcs in flight counter.
829 * We do not do flock request limiting, though */
831 mdc_get_mod_rpc_slot(req, it);
832 rc = obd_get_request_slot(&obddev->u.cli);
834 mdc_put_mod_rpc_slot(req, it);
835 mdc_clear_replay_flag(req, 0);
836 ptlrpc_req_finished(req);
841 rc = ldlm_cli_enqueue(exp, &req, einfo, &res_id, policy, &flags, NULL,
842 0, lvb_type, lockh, 0);
844 /* For flock requests we immediatelly return without further
845 delay and let caller deal with the rest, since rest of
846 this function metadata processing makes no sense for flock
847 requests anyway. But in case of problem during comms with
848 Server (ETIMEDOUT) or any signal/kill attempt (EINTR), we
849 can not rely on caller and this mainly for F_UNLCKs
850 (explicits or automatically generated by Kernel to clean
851 current FLocks upon exit) that can't be trashed */
852 if (((rc == -EINTR) || (rc == -ETIMEDOUT)) &&
853 (einfo->ei_type == LDLM_FLOCK) &&
854 (einfo->ei_mode == LCK_NL))
859 obd_put_request_slot(&obddev->u.cli);
860 mdc_put_mod_rpc_slot(req, it);
863 CDEBUG(D_INFO, "%s: ldlm_cli_enqueue failed: rc = %d\n",
864 obddev->obd_name, rc);
866 mdc_clear_replay_flag(req, rc);
867 ptlrpc_req_finished(req);
871 lockrep = req_capsule_server_get(&req->rq_pill, &RMF_DLM_REP);
872 LASSERT(lockrep != NULL);
874 lockrep->lock_policy_res2 =
875 ptlrpc_status_ntoh(lockrep->lock_policy_res2);
877 /* Retry infinitely when the server returns -EINPROGRESS for the
878 * intent operation, when server returns -EINPROGRESS for acquiring
879 * intent lock, we'll retry in after_reply(). */
880 if (it && (int)lockrep->lock_policy_res2 == -EINPROGRESS) {
881 mdc_clear_replay_flag(req, rc);
882 ptlrpc_req_finished(req);
885 CDEBUG(D_HA, "%s: resend:%d op:%d "DFID"/"DFID"\n",
886 obddev->obd_name, resends, it->it_op,
887 PFID(&op_data->op_fid1), PFID(&op_data->op_fid2));
889 if (generation == obddev->u.cli.cl_import->imp_generation) {
892 CDEBUG(D_HA, "resend cross eviction\n");
897 rc = mdc_finish_enqueue(exp, req, einfo, it, lockh, rc);
899 if (lustre_handle_is_used(lockh)) {
900 ldlm_lock_decref(lockh, einfo->ei_mode);
901 memset(lockh, 0, sizeof(*lockh));
903 ptlrpc_req_finished(req);
905 it->d.lustre.it_lock_handle = 0;
906 it->d.lustre.it_lock_mode = 0;
907 it->d.lustre.it_data = NULL;
913 static int mdc_finish_intent_lock(struct obd_export *exp,
914 struct ptlrpc_request *request,
915 struct md_op_data *op_data,
916 struct lookup_intent *it,
917 struct lustre_handle *lockh)
919 struct lustre_handle old_lock;
920 struct mdt_body *mdt_body;
921 struct ldlm_lock *lock;
925 LASSERT(request != NULL);
926 LASSERT(request != LP_POISON);
927 LASSERT(request->rq_repmsg != LP_POISON);
929 if (it->it_op & IT_READDIR)
932 if (!it_disposition(it, DISP_IT_EXECD)) {
933 /* The server failed before it even started executing the
934 * intent, i.e. because it couldn't unpack the request. */
935 LASSERT(it->d.lustre.it_status != 0);
936 RETURN(it->d.lustre.it_status);
938 rc = it_open_error(DISP_IT_EXECD, it);
942 mdt_body = req_capsule_server_get(&request->rq_pill, &RMF_MDT_BODY);
943 LASSERT(mdt_body != NULL); /* mdc_enqueue checked */
945 rc = it_open_error(DISP_LOOKUP_EXECD, it);
949 /* keep requests around for the multiple phases of the call
950 * this shows the DISP_XX must guarantee we make it into the call
952 if (!it_disposition(it, DISP_ENQ_CREATE_REF) &&
953 it_disposition(it, DISP_OPEN_CREATE) &&
954 !it_open_error(DISP_OPEN_CREATE, it)) {
955 it_set_disposition(it, DISP_ENQ_CREATE_REF);
956 ptlrpc_request_addref(request); /* balanced in ll_create_node */
958 if (!it_disposition(it, DISP_ENQ_OPEN_REF) &&
959 it_disposition(it, DISP_OPEN_OPEN) &&
960 !it_open_error(DISP_OPEN_OPEN, it)) {
961 it_set_disposition(it, DISP_ENQ_OPEN_REF);
962 ptlrpc_request_addref(request); /* balanced in ll_file_open */
963 /* BUG 11546 - eviction in the middle of open rpc processing */
964 OBD_FAIL_TIMEOUT(OBD_FAIL_MDC_ENQUEUE_PAUSE, obd_timeout);
967 if (it->it_op & IT_CREAT) {
968 /* XXX this belongs in ll_create_it */
969 } else if (it->it_op == IT_OPEN) {
970 LASSERT(!it_disposition(it, DISP_OPEN_CREATE));
972 LASSERT(it->it_op & (IT_GETATTR | IT_LOOKUP | IT_LAYOUT));
975 /* If we already have a matching lock, then cancel the new
976 * one. We have to set the data here instead of in
977 * mdc_enqueue, because we need to use the child's inode as
978 * the l_ast_data to match, and that's not available until
979 * intent_finish has performed the iget().) */
980 lock = ldlm_handle2lock(lockh);
982 ldlm_policy_data_t policy = lock->l_policy_data;
983 LDLM_DEBUG(lock, "matching against this");
985 LASSERTF(fid_res_name_eq(&mdt_body->mbo_fid1,
986 &lock->l_resource->lr_name),
987 "Lock res_id: "DLDLMRES", fid: "DFID"\n",
988 PLDLMRES(lock->l_resource), PFID(&mdt_body->mbo_fid1));
991 memcpy(&old_lock, lockh, sizeof(*lockh));
992 if (ldlm_lock_match(NULL, LDLM_FL_BLOCK_GRANTED, NULL,
993 LDLM_IBITS, &policy, LCK_NL, &old_lock, 0)) {
994 ldlm_lock_decref_and_cancel(lockh,
995 it->d.lustre.it_lock_mode);
996 memcpy(lockh, &old_lock, sizeof(old_lock));
997 it->d.lustre.it_lock_handle = lockh->cookie;
1000 CDEBUG(D_DENTRY,"D_IT dentry %.*s intent: %s status %d disp %x rc %d\n",
1001 (int)op_data->op_namelen, op_data->op_name,
1002 ldlm_it2str(it->it_op), it->d.lustre.it_status,
1003 it->d.lustre.it_disposition, rc);
1007 int mdc_revalidate_lock(struct obd_export *exp, struct lookup_intent *it,
1008 struct lu_fid *fid, __u64 *bits)
1010 /* We could just return 1 immediately, but since we should only
1011 * be called in revalidate_it if we already have a lock, let's
1013 struct ldlm_res_id res_id;
1014 struct lustre_handle lockh;
1015 ldlm_policy_data_t policy;
1019 if (it->d.lustre.it_lock_handle) {
1020 lockh.cookie = it->d.lustre.it_lock_handle;
1021 mode = ldlm_revalidate_lock_handle(&lockh, bits);
1023 fid_build_reg_res_name(fid, &res_id);
1024 switch (it->it_op) {
1026 /* File attributes are held under multiple bits:
1027 * nlink is under lookup lock, size and times are
1028 * under UPDATE lock and recently we've also got
1029 * a separate permissions lock for owner/group/acl that
1030 * were protected by lookup lock before.
1031 * Getattr must provide all of that information,
1032 * so we need to ensure we have all of those locks.
1033 * Unfortunately, if the bits are split across multiple
1034 * locks, there's no easy way to match all of them here,
1035 * so an extra RPC would be performed to fetch all
1036 * of those bits at once for now. */
1037 /* For new MDTs(> 2.4), UPDATE|PERM should be enough,
1038 * but for old MDTs (< 2.4), permission is covered
1039 * by LOOKUP lock, so it needs to match all bits here.*/
1040 policy.l_inodebits.bits = MDS_INODELOCK_UPDATE |
1041 MDS_INODELOCK_LOOKUP |
1045 policy.l_inodebits.bits = MDS_INODELOCK_UPDATE;
1048 policy.l_inodebits.bits = MDS_INODELOCK_LAYOUT;
1051 policy.l_inodebits.bits = MDS_INODELOCK_LOOKUP;
1055 mode = mdc_lock_match(exp, LDLM_FL_BLOCK_GRANTED, fid,
1056 LDLM_IBITS, &policy,
1057 LCK_CR | LCK_CW | LCK_PR | LCK_PW,
1062 it->d.lustre.it_lock_handle = lockh.cookie;
1063 it->d.lustre.it_lock_mode = mode;
1065 it->d.lustre.it_lock_handle = 0;
1066 it->d.lustre.it_lock_mode = 0;
1073 * This long block is all about fixing up the lock and request state
1074 * so that it is correct as of the moment _before_ the operation was
1075 * applied; that way, the VFS will think that everything is normal and
1076 * call Lustre's regular VFS methods.
1078 * If we're performing a creation, that means that unless the creation
1079 * failed with EEXIST, we should fake up a negative dentry.
1081 * For everything else, we want to lookup to succeed.
1083 * One additional note: if CREATE or OPEN succeeded, we add an extra
1084 * reference to the request because we need to keep it around until
1085 * ll_create/ll_open gets called.
1087 * The server will return to us, in it_disposition, an indication of
1088 * exactly what d.lustre.it_status refers to.
1090 * If DISP_OPEN_OPEN is set, then d.lustre.it_status refers to the open() call,
1091 * otherwise if DISP_OPEN_CREATE is set, then it status is the
1092 * creation failure mode. In either case, one of DISP_LOOKUP_NEG or
1093 * DISP_LOOKUP_POS will be set, indicating whether the child lookup
1096 * Else, if DISP_LOOKUP_EXECD then d.lustre.it_status is the rc of the
1099 int mdc_intent_lock(struct obd_export *exp, struct md_op_data *op_data,
1100 struct lookup_intent *it, struct ptlrpc_request **reqp,
1101 ldlm_blocking_callback cb_blocking, __u64 extra_lock_flags)
1103 struct ldlm_enqueue_info einfo = {
1104 .ei_type = LDLM_IBITS,
1105 .ei_mode = it_to_lock_mode(it),
1106 .ei_cb_bl = cb_blocking,
1107 .ei_cb_cp = ldlm_completion_ast,
1109 struct lustre_handle lockh;
1114 CDEBUG(D_DLMTRACE, "(name: %.*s,"DFID") in obj "DFID
1115 ", intent: %s flags %#"LPF64"o\n", (int)op_data->op_namelen,
1116 op_data->op_name, PFID(&op_data->op_fid2),
1117 PFID(&op_data->op_fid1), ldlm_it2str(it->it_op),
1121 if (fid_is_sane(&op_data->op_fid2) &&
1122 (it->it_op & (IT_LOOKUP | IT_GETATTR | IT_READDIR))) {
1123 /* We could just return 1 immediately, but since we should only
1124 * be called in revalidate_it if we already have a lock, let's
1126 it->d.lustre.it_lock_handle = 0;
1127 rc = mdc_revalidate_lock(exp, it, &op_data->op_fid2, NULL);
1128 /* Only return failure if it was not GETATTR by cfid
1129 (from inode_revalidate) */
1130 if (rc || op_data->op_namelen != 0)
1134 /* For case if upper layer did not alloc fid, do it now. */
1135 if (!fid_is_sane(&op_data->op_fid2) && it->it_op & IT_CREAT) {
1136 rc = mdc_fid_alloc(NULL, exp, &op_data->op_fid2, op_data);
1138 CERROR("Can't alloc new fid, rc %d\n", rc);
1143 rc = mdc_enqueue(exp, &einfo, NULL, it, op_data, &lockh,
1148 *reqp = it->d.lustre.it_data;
1149 rc = mdc_finish_intent_lock(exp, *reqp, op_data, it, &lockh);
1153 static int mdc_intent_getattr_async_interpret(const struct lu_env *env,
1154 struct ptlrpc_request *req,
1157 struct mdc_getattr_args *ga = args;
1158 struct obd_export *exp = ga->ga_exp;
1159 struct md_enqueue_info *minfo = ga->ga_minfo;
1160 struct ldlm_enqueue_info *einfo = ga->ga_einfo;
1161 struct lookup_intent *it;
1162 struct lustre_handle *lockh;
1163 struct obd_device *obddev;
1164 struct ldlm_reply *lockrep;
1165 __u64 flags = LDLM_FL_HAS_INTENT;
1169 lockh = &minfo->mi_lockh;
1171 obddev = class_exp2obd(exp);
1173 obd_put_request_slot(&obddev->u.cli);
1174 if (OBD_FAIL_CHECK(OBD_FAIL_MDC_GETATTR_ENQUEUE))
1177 rc = ldlm_cli_enqueue_fini(exp, req, einfo->ei_type, 1, einfo->ei_mode,
1178 &flags, NULL, 0, lockh, rc);
1180 CERROR("ldlm_cli_enqueue_fini: %d\n", rc);
1181 mdc_clear_replay_flag(req, rc);
1185 lockrep = req_capsule_server_get(&req->rq_pill, &RMF_DLM_REP);
1186 LASSERT(lockrep != NULL);
1188 lockrep->lock_policy_res2 =
1189 ptlrpc_status_ntoh(lockrep->lock_policy_res2);
1191 rc = mdc_finish_enqueue(exp, req, einfo, it, lockh, rc);
1195 rc = mdc_finish_intent_lock(exp, req, &minfo->mi_data, it, lockh);
1199 OBD_FREE_PTR(einfo);
1200 minfo->mi_cb(req, minfo, rc);
1204 int mdc_intent_getattr_async(struct obd_export *exp,
1205 struct md_enqueue_info *minfo,
1206 struct ldlm_enqueue_info *einfo)
1208 struct md_op_data *op_data = &minfo->mi_data;
1209 struct lookup_intent *it = &minfo->mi_it;
1210 struct ptlrpc_request *req;
1211 struct mdc_getattr_args *ga;
1212 struct obd_device *obddev = class_exp2obd(exp);
1213 struct ldlm_res_id res_id;
1214 /*XXX: Both MDS_INODELOCK_LOOKUP and MDS_INODELOCK_UPDATE are needed
1215 * for statahead currently. Consider CMD in future, such two bits
1216 * maybe managed by different MDS, should be adjusted then. */
1217 ldlm_policy_data_t policy = {
1218 .l_inodebits = { MDS_INODELOCK_LOOKUP |
1219 MDS_INODELOCK_UPDATE }
1222 __u64 flags = LDLM_FL_HAS_INTENT;
1225 CDEBUG(D_DLMTRACE, "name: %.*s in inode "DFID", intent: %s flags %#"
1227 (int)op_data->op_namelen, op_data->op_name,
1228 PFID(&op_data->op_fid1), ldlm_it2str(it->it_op), it->it_flags);
1230 fid_build_reg_res_name(&op_data->op_fid1, &res_id);
1231 req = mdc_intent_getattr_pack(exp, it, op_data);
1233 RETURN(PTR_ERR(req));
1235 rc = obd_get_request_slot(&obddev->u.cli);
1237 ptlrpc_req_finished(req);
1241 rc = ldlm_cli_enqueue(exp, &req, einfo, &res_id, &policy, &flags, NULL,
1242 0, LVB_T_NONE, &minfo->mi_lockh, 1);
1244 obd_put_request_slot(&obddev->u.cli);
1245 ptlrpc_req_finished(req);
1249 CLASSERT(sizeof(*ga) <= sizeof(req->rq_async_args));
1250 ga = ptlrpc_req_async_args(req);
1252 ga->ga_minfo = minfo;
1253 ga->ga_einfo = einfo;
1255 req->rq_interpret_reply = mdc_intent_getattr_async_interpret;
1256 ptlrpcd_add_req(req);