1 /* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
2 * vim:expandtab:shiftwidth=8:tabstop=8:
4 * Copyright (C) 2001-2003 Cluster File Systems, Inc.
6 * This file is part of Lustre, http://www.sf.net/projects/lustre/
8 * Lustre is free software; you can redistribute it and/or
9 * modify it under the terms of version 2 of the GNU General Public
10 * License as published by the Free Software Foundation.
12 * Lustre is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
17 * You should have received a copy of the GNU General Public License
18 * along with Lustre; if not, write to the Free Software
19 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
23 # define EXPORT_SYMTAB
25 #define DEBUG_SUBSYSTEM S_MDC
28 # include <linux/module.h>
29 # include <linux/pagemap.h>
30 # include <linux/miscdevice.h>
31 # include <linux/init.h>
33 # include <liblustre.h>
36 #include <linux/obd_class.h>
37 #include <linux/lustre_mds.h>
38 #include <linux/lustre_dlm.h>
39 #include <linux/lustre_sec.h>
40 #include <linux/lprocfs_status.h>
41 #include <linux/lustre_acl.h>
42 #include <linux/lustre_gs.h>
43 #include <linux/lustre_lite.h>
44 #include "mdc_internal.h"
46 int it_disposition(struct lookup_intent *it, int flag)
48 return LUSTRE_IT(it)->it_disposition & flag;
50 EXPORT_SYMBOL(it_disposition);
52 void it_set_disposition(struct lookup_intent *it, int flag)
54 LUSTRE_IT(it)->it_disposition |= flag;
56 EXPORT_SYMBOL(it_set_disposition);
58 static void mdc_id2mdc_data(struct mdc_op_data *data,
62 int namelen, int mode)
73 data->namelen = namelen;
74 data->create_mode = mode;
75 data->mod_time = LTIME_S(CURRENT_TIME);
78 static int it_to_lock_mode(struct lookup_intent *it)
80 /* CREAT needs to be tested before open (both could be set) */
81 if (it->it_op & IT_CREAT)
83 else if (it->it_op & (IT_READDIR | IT_GETATTR | IT_OPEN | IT_LOOKUP |
91 int it_open_error(int phase, struct lookup_intent *it)
93 if (it_disposition(it, DISP_OPEN_OPEN)) {
94 if (phase == DISP_OPEN_OPEN)
95 return LUSTRE_IT(it)->it_status;
100 if (it_disposition(it, DISP_OPEN_CREATE)) {
101 if (phase == DISP_OPEN_CREATE)
102 return LUSTRE_IT(it)->it_status;
107 if (it_disposition(it, DISP_LOOKUP_EXECD)) {
108 if (phase == DISP_LOOKUP_EXECD)
109 return LUSTRE_IT(it)->it_status;
114 if (it_disposition(it, DISP_IT_EXECD)) {
115 if (phase == DISP_IT_EXECD)
116 return LUSTRE_IT(it)->it_status;
120 CERROR("it disp: %X, status: %d\n", LUSTRE_IT(it)->it_disposition,
121 LUSTRE_IT(it)->it_status);
125 EXPORT_SYMBOL(it_open_error);
127 /* this must be called on a lockh that is known to have a referenced lock */
128 int mdc_set_lock_data(struct obd_export *exp, __u64 *l, void *data)
130 struct ldlm_lock *lock;
131 struct lustre_handle *lockh = (struct lustre_handle *)l;
139 lock = ldlm_handle2lock(lockh);
141 LASSERT(lock != NULL);
142 lock_res_and_lock(lock);
144 if (lock->l_ast_data && lock->l_ast_data != data) {
145 struct ll_inode_info *lli = ll_i2info(data);
146 struct inode *old_inode = lock->l_ast_data;
147 struct inode *new_inode = data;
148 LASSERT(lli->lli_inode_magic == LLI_INODE_MAGIC);
149 if (!(old_inode->i_state & I_FREEING)) {
150 CERROR("Found existing inode %p/%lu/%u state %lu "
151 "in lock: setting data to %p/%lu/%u\n",
152 old_inode, old_inode->i_ino,
153 old_inode->i_generation, old_inode->i_state,
154 new_inode, new_inode->i_ino,
155 new_inode->i_generation);
156 unlock_res_and_lock(lock);
161 lock->l_ast_data = data;
162 unlock_res_and_lock(lock);
168 EXPORT_SYMBOL(mdc_set_lock_data);
170 int mdc_change_cbdata(struct obd_export *exp, struct lustre_id *id,
171 ldlm_iterator_t it, void *data)
173 struct ldlm_res_id res_id = { .name = {0} };
176 res_id.name[0] = id_fid(id);
177 res_id.name[1] = id_group(id);
179 ldlm_change_cbdata(class_exp2obd(exp)->obd_namespace,
187 mdc_clear_replay_flag(struct ptlrpc_request *req, int rc)
189 /* Don't hold error requests for replay. */
190 if (req->rq_replay) {
191 unsigned long irqflags;
192 spin_lock_irqsave(&req->rq_lock, irqflags);
194 spin_unlock_irqrestore(&req->rq_lock, irqflags);
196 if (rc && req->rq_transno != 0) {
197 DEBUG_REQ(D_ERROR, req, "transno returned on error rc %d", rc);
202 /* We always reserve enough space in the reply packet for a stripe MD, because
203 * we don't know in advance the file type. */
204 int mdc_enqueue(struct obd_export *exp,
206 struct lookup_intent *it,
208 struct mdc_op_data *data,
209 struct lustre_handle *lockh,
212 ldlm_completion_callback cb_completion,
213 ldlm_blocking_callback cb_blocking,
216 struct ptlrpc_request *req;
217 struct ldlm_res_id res_id = {
218 .name = {id_fid(&data->id1), id_group(&data->id1)}
220 struct obd_device *obddev = class_exp2obd(exp);
221 ldlm_policy_data_t policy = { .l_inodebits = { MDS_INODELOCK_LOOKUP } };
222 struct ldlm_intent *lit;
223 struct ldlm_request *lockreq;
224 int reqsize[6] = {[MDS_REQ_SECDESC_OFF] = 0,
225 [MDS_REQ_INTENT_LOCKREQ_OFF] = sizeof(*lockreq),
226 [MDS_REQ_INTENT_IT_OFF] = sizeof(*lit)};
227 int repsize[8] = {sizeof(struct ldlm_reply),
228 sizeof(struct mds_body),
229 obddev->u.cli.cl_max_mds_easize};
230 int req_buffers = 3, reply_buffers = 0;
231 int rc, flags = LDLM_FL_HAS_INTENT;
232 struct ldlm_reply *dlm_rep = NULL;
234 unsigned long irqflags;
237 // LDLM_DEBUG_NOLOCK("mdsintent=%s,name=%s,dir=%lu",
238 // ldlm_it2str(it->it_op), it_name, it_inode->i_ino);
240 reqsize[0] = lustre_secdesc_size();
242 if (it->it_op & IT_OPEN) {
243 struct lustre_intent_data *lustre_data =
244 (struct lustre_intent_data *) it->d.fs_data;
245 it->it_create_mode |= S_IFREG;
246 it->it_create_mode &= ~current->fs->umask;
248 reqsize[req_buffers++] = sizeof(struct mds_rec_create);
249 reqsize[req_buffers++] = data->namelen + 1;
250 reqsize[req_buffers++] = obddev->u.cli.cl_max_mds_easize;
251 /*pack the lustre key*/
252 if (lustre_data->it_key_size > 0 && lustre_data->it_key)
253 reqsize[req_buffers++] = lustre_data->it_key_size;
255 req = ptlrpc_prep_req(class_exp2cliimp(exp), LUSTRE_DLM_VERSION,
256 LDLM_ENQUEUE, req_buffers, reqsize, NULL);
260 spin_lock_irqsave (&req->rq_lock, irqflags);
262 spin_unlock_irqrestore (&req->rq_lock, irqflags);
264 /* pack the intent */
265 lit = lustre_msg_buf(req->rq_reqmsg, MDS_REQ_INTENT_IT_OFF,
267 lit->opc = (__u64)it->it_op;
269 /* pack the intended request */
270 mdc_open_pack(req->rq_reqmsg, MDS_REQ_INTENT_REC_OFF, data,
271 it->it_create_mode, 0, it->it_flags, lmm, lmmsize,
272 lustre_data->it_key, lustre_data->it_key_size);
273 /* get ready for the reply */
275 repsize[reply_buffers++] = sizeof(int);
276 repsize[reply_buffers++] = xattr_acl_size(LL_ACL_MAX_ENTRIES);
277 repsize[reply_buffers++] = sizeof(int);
278 repsize[reply_buffers++] = sizeof(struct crypto_key);
279 repsize[reply_buffers++] = sizeof(struct lustre_capa);
280 req->rq_replen = lustre_msg_size(reply_buffers, repsize);
281 } else if (it->it_op & (IT_GETATTR | IT_LOOKUP | IT_CHDIR)) {
282 __u64 valid = data->valid | OBD_MD_FLNOTOBD | OBD_MD_FLEASIZE |
283 OBD_MD_FLACL | OBD_MD_FLKEY;
285 /* we don't expect xattr retrieve could reach here */
286 LASSERT(!(valid & (OBD_MD_FLXATTR | OBD_MD_FLXATTRLIST)));
288 reqsize[req_buffers++] = sizeof(struct mds_body);
289 reqsize[req_buffers++] = data->namelen + 1;
291 if (it->it_op & IT_GETATTR)
292 policy.l_inodebits.bits = MDS_INODELOCK_UPDATE;
294 req = ptlrpc_prep_req(class_exp2cliimp(exp), LUSTRE_DLM_VERSION,
295 LDLM_ENQUEUE, req_buffers, reqsize, NULL);
300 /* pack the intent */
301 lit = lustre_msg_buf(req->rq_reqmsg, MDS_REQ_INTENT_IT_OFF,
303 lit->opc = (__u64)it->it_op;
305 /* pack the intended request */
306 mdc_getattr_pack(req->rq_reqmsg, MDS_REQ_INTENT_REC_OFF,
307 valid, it->it_flags, data);
309 /* get ready for the reply */
311 repsize[reply_buffers++] = sizeof(int);
312 repsize[reply_buffers++] = xattr_acl_size(LL_ACL_MAX_ENTRIES);
313 repsize[reply_buffers++] = sizeof(int);
314 repsize[reply_buffers++] = sizeof(struct crypto_key);
315 req->rq_replen = lustre_msg_size(reply_buffers, repsize);
316 } else if (it->it_op == IT_READDIR) {
317 policy.l_inodebits.bits = MDS_INODELOCK_UPDATE;
318 req = ptlrpc_prep_req(class_exp2cliimp(exp), LUSTRE_DLM_VERSION,
319 LDLM_ENQUEUE, 2, reqsize, NULL);
323 /* get ready for the reply */
325 req->rq_replen = lustre_msg_size(1, repsize);
326 } else if (it->it_op == IT_UNLINK) {
327 reqsize[req_buffers++] = sizeof(struct mds_body);
328 policy.l_inodebits.bits = MDS_INODELOCK_UPDATE;
329 req = ptlrpc_prep_req(class_exp2cliimp(exp), LUSTRE_DLM_VERSION,
330 LDLM_ENQUEUE, req_buffers, reqsize, NULL);
334 /* pack the intended request */
335 mdc_getattr_pack(req->rq_reqmsg, MDS_REQ_INTENT_REC_OFF,
338 /* pack the intent */
339 lit = lustre_msg_buf(req->rq_reqmsg, MDS_REQ_INTENT_IT_OFF,
341 lit->opc = (__u64)it->it_op;
343 /* get ready for the reply */
345 req->rq_replen = lustre_msg_size(3, repsize);
351 lustre_pack_secdesc(req, reqsize[0]);
353 mdc_get_rpc_lock(obddev->u.cli.cl_rpc_lock, it);
354 rc = ldlm_cli_enqueue(exp, req, obddev->obd_namespace, res_id,
355 lock_type, &policy, lock_mode, &flags,cb_blocking,
356 cb_completion, NULL, cb_data, NULL, 0, NULL,
358 mdc_put_rpc_lock(obddev->u.cli.cl_rpc_lock, it);
360 /* Similarly, if we're going to replay this request, we don't want to
361 * actually get a lock, just perform the intent. */
362 if (req->rq_transno || req->rq_replay) {
363 lockreq = lustre_msg_buf(req->rq_reqmsg,
364 MDS_REQ_INTENT_LOCKREQ_OFF,
366 lockreq->lock_flags |= LDLM_FL_INTENT_ONLY;
369 /* This can go when we're sure that this can never happen */
370 LASSERT(rc != -ENOENT);
371 /* We need dlm_rep to be assigned this early, to check lock mode of
372 returned lock from request to avoid possible race with lock
374 if (rc == ELDLM_LOCK_ABORTED || !rc) {
375 dlm_rep = lustre_msg_buf(req->rq_repmsg, 0, sizeof (*dlm_rep));
376 LASSERT(dlm_rep != NULL); /* checked by ldlm_cli_enqueue() */
378 if (rc == ELDLM_LOCK_ABORTED) {
380 memset(lockh, 0, sizeof(*lockh));
382 } else if (rc != 0) {
383 CERROR("ldlm_cli_enqueue: %d\n", rc);
384 LASSERTF(rc < 0, "rc = %d\n", rc);
385 mdc_clear_replay_flag(req, rc);
386 ptlrpc_req_finished(req);
388 } else { /* rc = 0 */
389 struct ldlm_lock *lock = ldlm_handle2lock(lockh);
392 /* If the server gave us back a different lock mode, we should
393 * fix up our variables. */
394 if (dlm_rep->lock_desc.l_req_mode != lock_mode) {
395 ldlm_lock_addref(lockh, dlm_rep->lock_desc.l_req_mode);
396 ldlm_lock_decref(lockh, lock_mode);
397 lock_mode = dlm_rep->lock_desc.l_req_mode;
400 ldlm_lock_allow_match(lock);
404 LASSERT_REPSWABBED(req, 0); /* swabbed by ldlm_cli_enqueue() */
406 LUSTRE_IT(it)->it_disposition = (int) dlm_rep->lock_policy_res1;
407 LUSTRE_IT(it)->it_status = (int) dlm_rep->lock_policy_res2;
408 LUSTRE_IT(it)->it_lock_mode = lock_mode;
409 LUSTRE_IT(it)->it_data = req;
411 if (LUSTRE_IT(it)->it_status < 0 && req->rq_replay)
412 mdc_clear_replay_flag(req, LUSTRE_IT(it)->it_status);
414 DEBUG_REQ(D_DLMTRACE, req, "disposition: %x, status: %d",
415 LUSTRE_IT(it)->it_disposition, LUSTRE_IT(it)->it_status);
417 /* We know what to expect, so we do any byte flipping required here */
418 LASSERT(reply_buffers == 1 || reply_buffers == 3 ||
419 reply_buffers == 5 || reply_buffers == 7 ||
421 if (reply_buffers >= 3) {
422 struct mds_body *body;
424 body = lustre_swab_repbuf(req, 1, sizeof (*body),
425 lustre_swab_mds_body);
427 CERROR ("Can't swab mds_body\n");
431 if ((body->valid & OBD_MD_FLEASIZE) != 0) {
432 /* The eadata is opaque; just check that it is there.
433 * Eventually, obd_unpackmd() will check the contents */
434 eadata = lustre_swab_repbuf(req, 2, body->eadatasize,
436 if (eadata == NULL) {
437 CERROR ("Missing/short eadata\n");
440 if (it->it_op & IT_OPEN) {
443 replayea = lustre_msg_buf(req->rq_reqmsg,
444 MDS_REQ_INTENT_REC_OFF + 2,
447 memcpy(replayea, eadata, body->eadatasize);
449 LASSERT(req->rq_reqmsg->bufcount == 6 ||
450 req->rq_reqmsg->bufcount == 7);
451 req->rq_reqmsg->buflens[5] = body->eadatasize;
452 /* If this isn't the last buffer, we might
453 * have to shift other data around. */
457 /* just swab out capa to check here, and for future use */
458 if (body->valid & OBD_MD_CAPA) {
459 struct lustre_capa *capa;
461 LASSERT(it->it_op & IT_OPEN);
462 capa = lustre_swab_repbuf(req, 7, sizeof(*capa),
463 lustre_swab_lustre_capa);
470 EXPORT_SYMBOL(mdc_enqueue);
473 * This long block is all about fixing up the lock and request state
474 * so that it is correct as of the moment _before_ the operation was
475 * applied; that way, the VFS will think that everything is normal and
476 * call Lustre's regular VFS methods.
478 * If we're performing a creation, that means that unless the creation
479 * failed with EEXIST, we should fake up a negative dentry.
481 * For everything else, we want to lookup to succeed.
483 * One additional note: if CREATE or OPEN succeeded, we add an extra
484 * reference to the request because we need to keep it around until
485 * ll_create/ll_open gets called.
487 * The server will return to us, in it_disposition, an indication of
488 * exactly what d.lustre->it_status refers to.
490 * If DISP_OPEN_OPEN is set, then d.lustre->it_status refers to the open() call,
491 * otherwise if DISP_OPEN_CREATE is set, then it status is the
492 * creation failure mode. In either case, one of DISP_LOOKUP_NEG or
493 * DISP_LOOKUP_POS will be set, indicating whether the child lookup
496 * Else, if DISP_LOOKUP_EXECD then d.lustre->it_status is the rc of the
499 int mdc_intent_lock(struct obd_export *exp, struct lustre_id *pid,
500 const char *name, int len, void *lmm, int lmmsize,
501 struct lustre_id *cid, struct lookup_intent *it,
502 int lookup_flags, struct ptlrpc_request **reqp,
503 ldlm_blocking_callback cb_blocking)
505 struct lustre_handle lockh;
506 struct ptlrpc_request *request;
507 struct mds_body *mds_body;
508 struct lustre_handle old_lock;
509 struct ldlm_lock *lock;
514 CDEBUG(D_DLMTRACE, "name: %*s in obj "DLID4", intent: %s flags %#o\n",
515 len, name, OLID4(pid), ldlm_it2str(it->it_op), it->it_flags);
517 if (cid && (it->it_op == IT_LOOKUP || it->it_op == IT_GETATTR ||
518 it->it_op == IT_CHDIR)) {
519 /* We could just return 1 immediately, but since we should only
520 * be called in revalidate_it if we already have a lock, let's
522 struct ldlm_res_id res_id = {.name = {id_fid(cid),
524 struct lustre_handle lockh;
525 ldlm_policy_data_t policy;
528 /* For the GETATTR case, ll_revalidate_it issues two separate
529 queries - for LOOKUP and for UPDATE lock because it cannot
530 check them together - we might have those two bits to be
531 present in two separate granted locks */
532 policy.l_inodebits.bits = (it->it_op == IT_GETATTR) ?
533 MDS_INODELOCK_UPDATE : MDS_INODELOCK_LOOKUP;
536 rc = ldlm_lock_match(exp->exp_obd->obd_namespace,
537 LDLM_FL_BLOCK_GRANTED, &res_id,
538 LDLM_IBITS, &policy, mode,
543 rc = ldlm_lock_match(exp->exp_obd->obd_namespace,
544 LDLM_FL_BLOCK_GRANTED, &res_id,
545 LDLM_IBITS, &policy, mode,
550 rc = ldlm_lock_match(exp->exp_obd->obd_namespace,
551 LDLM_FL_BLOCK_GRANTED, &res_id,
552 LDLM_IBITS, &policy, mode,
557 rc = ldlm_lock_match(exp->exp_obd->obd_namespace,
558 LDLM_FL_BLOCK_GRANTED, &res_id,
559 LDLM_IBITS, &policy, mode,
563 if (ptlrpcs_check_cred(exp->exp_obd->u.cli.cl_import)) {
564 /* return immediately if no credential held */
565 ldlm_lock_decref(&lockh, mode);
568 memcpy(&LUSTRE_IT(it)->it_lock_handle, &lockh,
570 LUSTRE_IT(it)->it_lock_mode = mode;
573 /* Only return failure if it was not GETATTR by cid (from
579 /* lookup_it may be called only after revalidate_it has run, because
580 * revalidate_it cannot return errors, only zero. Returning zero causes
581 * this call to lookup, which *can* return an error.
583 * We only want to execute the request associated with the intent one
584 * time, however, so don't send the request again. Instead, skip past
585 * this and use the request from revalidate. In this case, revalidate
586 * never dropped its reference, so the refcounts are all OK */
587 if (!it_disposition(it, DISP_ENQ_COMPLETE)) {
588 struct mdc_op_data *op_data;
590 OBD_ALLOC(op_data, sizeof(*op_data));
594 mdc_id2mdc_data(op_data, pid, cid, name, len, 0);
597 op_data->valid |= OBD_MD_FID;
599 rc = mdc_enqueue(exp, LDLM_IBITS, it, it_to_lock_mode(it),
600 op_data, &lockh, lmm, lmmsize,
601 ldlm_completion_ast, cb_blocking, NULL);
602 OBD_FREE(op_data, sizeof(*op_data));
606 memcpy(&LUSTRE_IT(it)->it_lock_handle, &lockh, sizeof(lockh));
608 request = *reqp = LUSTRE_IT(it)->it_data;
609 LASSERT(request != NULL);
611 /* If we're doing an IT_OPEN which did not result in an actual
612 * successful open, then we need to remove the bit which saves this
613 * request for unconditional replay.
615 * It's important that we do this first! Otherwise we might exit the
616 * function without doing so, and try to replay a failed create (bug
618 if (it->it_op & IT_OPEN && request->rq_replay &&
619 (!it_disposition(it, DISP_OPEN_OPEN) || LUSTRE_IT(it)->it_status != 0))
620 mdc_clear_replay_flag(request, LUSTRE_IT(it)->it_status);
622 if (!it_disposition(it, DISP_IT_EXECD)) {
623 /* The server failed before it even started executing the
624 * intent, i.e. because it couldn't unpack the request. */
625 LASSERT(LUSTRE_IT(it)->it_status != 0);
626 RETURN(LUSTRE_IT(it)->it_status);
628 rc = it_open_error(DISP_IT_EXECD, it);
632 mds_body = lustre_msg_buf(request->rq_repmsg, 1, sizeof(*mds_body));
633 LASSERT(mds_body != NULL); /* mdc_enqueue checked */
634 LASSERT_REPSWABBED(request, 1); /* mdc_enqueue swabbed */
636 /* If we were revalidating a fid/name pair, mark the intent in case we
637 * fail and get called again from lookup */
639 it_set_disposition(it, DISP_ENQ_COMPLETE);
640 /* Also: did we find the same inode? */
642 /* we have to compare all the fields but type, because MDS can
643 * return fid/mds/ino/gen if inode lives on another MDS -bzzz */
644 if (!(lookup_flags & LOOKUP_COBD) && !id_equal(cid, &mds_body->id1))
648 rc = it_open_error(DISP_LOOKUP_EXECD, it);
653 * keep requests around for the multiple phases of the call this shows
654 * the DISP_XX must guarantee we make it into the call.
656 if (it_disposition(it, DISP_OPEN_CREATE) &&
657 !it_open_error(DISP_OPEN_CREATE, it))
658 ptlrpc_request_addref(request); /* balanced in ll_create_node */
659 if (it_disposition(it, DISP_OPEN_OPEN) &&
660 !it_open_error(DISP_OPEN_OPEN, it))
661 ptlrpc_request_addref(request); /* balanced in ll_file_open */
663 if (it->it_op & IT_CREAT) {
664 /* XXX this belongs in ll_create_it */
665 } else if (it->it_op == IT_OPEN) {
666 LASSERT(!it_disposition(it, DISP_OPEN_CREATE));
668 LASSERT(it->it_op & (IT_GETATTR | IT_LOOKUP | IT_CHDIR));
672 * if we already have a matching lock, then cancel the new one. We have
673 * to set the data here instead of in mdc_enqueue, because we need to
674 * use the child's inode as the l_ast_data to match, and that's not
675 * available until intent_finish has performed the iget().)
677 lock = ldlm_handle2lock(&lockh);
679 ldlm_policy_data_t policy = lock->l_policy_data;
680 LDLM_DEBUG(lock, "matching against this");
683 LASSERTF(id_fid(&mds_body->id1) == lock->l_resource->lr_name.name[0] &&
684 id_group(&mds_body->id1) == lock->l_resource->lr_name.name[1],
685 "Invalid lock is returned to client. Lock res_is: %lu/%lu, "
686 "response res_id: %lu/%lu.\n",
687 (unsigned long)lock->l_resource->lr_name.name[0],
688 (unsigned long)lock->l_resource->lr_name.name[1],
689 (unsigned long)id_fid(&mds_body->id1),
690 (unsigned long)id_group(&mds_body->id1));
692 memcpy(&old_lock, &lockh, sizeof(lockh));
693 if (ldlm_lock_match(NULL, LDLM_FL_BLOCK_GRANTED, NULL,
694 LDLM_IBITS, &policy, LCK_NL, &old_lock)) {
695 ldlm_lock_decref_and_cancel(&lockh,
696 LUSTRE_IT(it)->it_lock_mode);
697 memcpy(&lockh, &old_lock, sizeof(old_lock));
698 memcpy(&LUSTRE_IT(it)->it_lock_handle, &lockh,
702 CDEBUG(D_DENTRY, "D_IT dentry %*s intent: %s status %d disp %x rc %d\n",
703 len, name, ldlm_it2str(it->it_op), LUSTRE_IT(it)->it_status,
704 LUSTRE_IT(it)->it_disposition, rc);
708 EXPORT_SYMBOL(mdc_intent_lock);