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 #include <linux/sched.h>
39 #include <linux/smp_lock.h>
40 #include <linux/quotaops.h>
42 #define DEBUG_SUBSYSTEM S_LLITE
44 #include <obd_support.h>
45 #include <lustre_lite.h>
46 #include <lustre/lustre_idl.h>
47 #include <lustre_dlm.h>
48 #include <lustre_mdc.h>
49 //#include <lustre_ver.h>
50 //#include <lustre_version.h>
52 #include "llite_internal.h"
54 spinlock_t ll_lookup_lock = SPIN_LOCK_UNLOCKED;
56 /* should NOT be called with the dcache lock, see fs/dcache.c */
57 static void ll_release(struct dentry *de)
59 struct ll_dentry_data *lld;
63 if (lld == NULL) { /* NFS copies the de->d_op methods (bug 4655) */
67 #ifndef HAVE_VFS_INTENT_PATCHES
69 ll_intent_release(lld->lld_it);
70 OBD_FREE(lld->lld_it, sizeof(*lld->lld_it));
73 LASSERT(lld->lld_cwd_count == 0);
74 LASSERT(lld->lld_mnt_count == 0);
75 OBD_FREE(de->d_fsdata, sizeof(*lld));
80 #ifdef DCACHE_LUSTRE_INVALID
81 /* Compare if two dentries are the same. Don't match if the existing dentry
82 * is marked DCACHE_LUSTRE_INVALID. Returns 1 if different, 0 if the same.
84 * This avoids a race where ll_lookup_it() instantiates a dentry, but we get
85 * an AST before calling d_revalidate_it(). The dentry still exists (marked
86 * INVALID) so d_lookup() matches it, but we have no lock on it (so
87 * lock_match() fails) and we spin around real_lookup(). */
88 int ll_dcompare(struct dentry *parent, struct qstr *d_name, struct qstr *name)
90 struct dentry *dchild;
93 if (d_name->len != name->len)
96 if (memcmp(d_name->name, name->name, name->len))
99 /* XXX: d_name must be in-dentry structure */
100 dchild = container_of(d_name, struct dentry, d_name); /* ugh */
101 if (dchild->d_flags & DCACHE_LUSTRE_INVALID) {
102 CDEBUG(D_DENTRY,"INVALID dentry %p not matched, was bug 3784\n",
111 /* should NOT be called with the dcache lock, see fs/dcache.c */
112 static int ll_ddelete(struct dentry *de)
116 #ifndef DCACHE_LUSTRE_INVALID
117 #define DCACHE_LUSTRE_INVALID 0
120 CDEBUG(D_DENTRY, "%s dentry %.*s (%p, parent %p, inode %p) %s%s\n",
121 (de->d_flags & DCACHE_LUSTRE_INVALID ? "deleting" : "keeping"),
122 de->d_name.len, de->d_name.name, de, de->d_parent, de->d_inode,
123 d_unhashed(de) ? "" : "hashed,",
124 list_empty(&de->d_subdirs) ? "" : "subdirs");
125 #if DCACHE_LUSTRE_INVALID == 0
126 #undef DCACHE_LUSTRE_INVALID
132 void ll_set_dd(struct dentry *de)
137 CDEBUG(D_DENTRY, "ldd on dentry %.*s (%p) parent %p inode %p refc %d\n",
138 de->d_name.len, de->d_name.name, de, de->d_parent, de->d_inode,
139 atomic_read(&de->d_count));
141 if (de->d_fsdata == NULL) {
142 struct ll_dentry_data *lld;
145 if (likely(lld != NULL)) {
147 if (likely(de->d_fsdata == NULL))
158 void ll_intent_drop_lock(struct lookup_intent *it)
160 struct lustre_handle *handle;
162 if (it->it_op && it->d.lustre.it_lock_mode) {
163 handle = (struct lustre_handle *)&it->d.lustre.it_lock_handle;
164 CDEBUG(D_DLMTRACE, "releasing lock with cookie "LPX64
165 " from it %p\n", handle->cookie, it);
166 ldlm_lock_decref(handle, it->d.lustre.it_lock_mode);
168 /* bug 494: intent_release may be called multiple times, from
169 * this thread and we don't want to double-decref this lock */
170 it->d.lustre.it_lock_mode = 0;
174 void ll_intent_release(struct lookup_intent *it)
178 CDEBUG(D_INFO, "intent %p released\n", it);
179 ll_intent_drop_lock(it);
180 #ifdef HAVE_VFS_INTENT_PATCHES
182 it->it_op_release = 0;
184 /* We are still holding extra reference on a request, need to free it */
185 if (it_disposition(it, DISP_ENQ_OPEN_REF))
186 ptlrpc_req_finished(it->d.lustre.it_data); /* ll_file_open */
187 if (it_disposition(it, DISP_ENQ_CREATE_REF)) /* create rec */
188 ptlrpc_req_finished(it->d.lustre.it_data);
189 if (it_disposition(it, DISP_ENQ_COMPLETE)) /* saved req from revalidate
191 ptlrpc_req_finished(it->d.lustre.it_data);
193 it->d.lustre.it_disposition = 0;
194 it->d.lustre.it_data = NULL;
198 /* Drop dentry if it is not used already, unhash otherwise.
199 Should be called with dcache lock held!
200 Returns: 1 if dentry was dropped, 0 if unhashed. */
201 int ll_drop_dentry(struct dentry *dentry)
204 if (atomic_read(&dentry->d_count) == 0) {
205 CDEBUG(D_DENTRY, "deleting dentry %.*s (%p) parent %p "
206 "inode %p\n", dentry->d_name.len,
207 dentry->d_name.name, dentry, dentry->d_parent,
211 unlock_dentry(dentry);
212 spin_unlock(&dcache_lock);
213 spin_unlock(&ll_lookup_lock);
215 spin_lock(&ll_lookup_lock);
216 spin_lock(&dcache_lock);
219 /* disconected dentry can not be find without lookup, because we
220 * not need his to unhash or mark invalid. */
221 if (dentry->d_flags & DCACHE_DISCONNECTED) {
222 unlock_dentry(dentry);
226 #ifdef DCACHE_LUSTRE_INVALID
227 if (!(dentry->d_flags & DCACHE_LUSTRE_INVALID)) {
229 if (!d_unhashed(dentry)) {
231 CDEBUG(D_DENTRY, "unhashing dentry %.*s (%p) parent %p "
232 "inode %p refc %d\n", dentry->d_name.len,
233 dentry->d_name.name, dentry, dentry->d_parent,
234 dentry->d_inode, atomic_read(&dentry->d_count));
235 /* actually we don't unhash the dentry, rather just
236 * mark it inaccessible for to __d_lookup(). otherwise
237 * sys_getcwd() could return -ENOENT -bzzz */
238 #ifdef DCACHE_LUSTRE_INVALID
239 dentry->d_flags |= DCACHE_LUSTRE_INVALID;
241 if (!dentry->d_inode || !S_ISDIR(dentry->d_inode->i_mode))
245 unlock_dentry(dentry);
249 void ll_unhash_aliases(struct inode *inode)
251 struct list_head *tmp, *head;
255 CERROR("unexpected NULL inode, tell phil\n");
259 CDEBUG(D_INODE, "marking dentries for ino %lu/%u(%p) invalid\n",
260 inode->i_ino, inode->i_generation, inode);
262 head = &inode->i_dentry;
263 spin_lock(&ll_lookup_lock);
264 spin_lock(&dcache_lock);
267 while ((tmp = tmp->next) != head) {
268 struct dentry *dentry = list_entry(tmp, struct dentry, d_alias);
270 CDEBUG(D_DENTRY, "dentry in drop %.*s (%p) parent %p "
271 "inode %p flags %d\n", dentry->d_name.len,
272 dentry->d_name.name, dentry, dentry->d_parent,
273 dentry->d_inode, dentry->d_flags);
275 if (dentry->d_name.len == 1 && dentry->d_name.name[0] == '/') {
276 CERROR("called on root (?) dentry=%p, inode=%p "
277 "ino=%lu\n", dentry, inode, inode->i_ino);
278 lustre_dump_dentry(dentry, 1);
279 libcfs_debug_dumpstack(NULL);
280 } else if (d_mountpoint(dentry)) {
281 /* For mountpoints we skip removal of the dentry
282 which happens solely because we have a lock on it
283 obtained when this dentry was not a mountpoint yet */
284 CDEBUG(D_DENTRY, "Skippind mountpoint dentry removal "
285 "%.*s (%p) parent %p\n",
288 dentry, dentry->d_parent);
293 if (ll_drop_dentry(dentry))
296 spin_unlock(&dcache_lock);
297 spin_unlock(&ll_lookup_lock);
302 int ll_revalidate_it_finish(struct ptlrpc_request *request,
303 struct lookup_intent *it,
312 if (it_disposition(it, DISP_LOOKUP_NEG))
315 rc = ll_prep_inode(&de->d_inode, request, NULL);
320 void ll_lookup_finish_locks(struct lookup_intent *it, struct dentry *dentry)
323 LASSERT(dentry != NULL);
325 if (it->d.lustre.it_lock_mode && dentry->d_inode != NULL) {
326 struct inode *inode = dentry->d_inode;
327 struct ll_sb_info *sbi = ll_i2sbi(dentry->d_inode);
329 CDEBUG(D_DLMTRACE, "setting l_data to inode %p (%lu/%u)\n",
330 inode, inode->i_ino, inode->i_generation);
331 md_set_lock_data(sbi->ll_md_exp, &it->d.lustre.it_lock_handle,
335 /* drop lookup or getattr locks immediately */
336 if (it->it_op == IT_LOOKUP || it->it_op == IT_GETATTR) {
337 /* on 2.6 there are situation when several lookups and
338 * revalidations may be requested during single operation.
339 * therefore, we don't release intent here -bzzz */
340 ll_intent_drop_lock(it);
344 void ll_frob_intent(struct lookup_intent **itp, struct lookup_intent *deft)
346 struct lookup_intent *it = *itp;
347 #ifdef HAVE_VFS_INTENT_PATCHES
349 LASSERTF(it->it_magic == INTENT_MAGIC,
350 "%p has bad intent magic: %x\n",
355 if (!it || it->it_op == IT_GETXATTR)
358 #ifdef HAVE_VFS_INTENT_PATCHES
359 it->it_op_release = ll_intent_release;
363 int ll_revalidate_it(struct dentry *de, int lookup_flags,
364 struct lookup_intent *it)
366 struct md_op_data *op_data;
367 struct ptlrpc_request *req = NULL;
368 struct lookup_intent lookup_it = { .it_op = IT_LOOKUP };
369 struct obd_export *exp;
370 struct inode *parent;
374 CDEBUG(D_VFSTRACE, "VFS Op:name=%s,intent=%s\n", de->d_name.name,
377 if (de->d_inode == NULL) {
378 /* We can only use negative dentries if this is stat or lookup,
379 for opens and stuff we do need to query server. */
380 /* If there is IT_CREAT in intent op set, then we must throw
381 away this negative dentry and actually do the request to
382 kernel to create whatever needs to be created (if possible)*/
383 if (it && (it->it_op & IT_CREAT))
386 #ifdef DCACHE_LUSTRE_INVALID
387 if (de->d_flags & DCACHE_LUSTRE_INVALID)
391 rc = ll_have_md_lock(de->d_parent->d_inode,
392 MDS_INODELOCK_UPDATE);
396 exp = ll_i2mdexp(de->d_inode);
398 /* Never execute intents for mount points.
399 * Attributes will be fixed up in ll_inode_revalidate_it */
400 if (d_mountpoint(de))
401 GOTO(out_sa, rc = 1);
403 /* Root of the lustre tree. Always valid.
404 * Attributes will be fixed up in ll_inode_revalidate_it */
405 if (de == de->d_sb->s_root)
406 GOTO(out_sa, rc = 1);
408 OBD_FAIL_TIMEOUT(OBD_FAIL_MDC_REVALIDATE_PAUSE, 5);
409 ll_frob_intent(&it, &lookup_it);
411 parent = de->d_parent->d_inode;
413 op_data = ll_prep_md_op_data(NULL, parent, de->d_inode,
414 de->d_name.name, de->d_name.len,
415 0, LUSTRE_OPC_ANY, NULL);
417 RETURN(PTR_ERR(op_data));
419 if ((it->it_op == IT_OPEN) && de->d_inode) {
420 struct inode *inode = de->d_inode;
421 struct ll_inode_info *lli = ll_i2info(inode);
422 struct obd_client_handle **och_p;
426 * We used to check for MDS_INODELOCK_OPEN here, but in fact
427 * just having LOOKUP lock is enough to justify inode is the
428 * same. And if inode is the same and we have suitable
429 * openhandle, then there is no point in doing another OPEN RPC
430 * just to throw away newly received openhandle. There are no
431 * security implications too, if file owner or access mode is
432 * change, LOOKUP lock is revoked.
436 if (it->it_flags & FMODE_WRITE) {
437 och_p = &lli->lli_mds_write_och;
438 och_usecount = &lli->lli_open_fd_write_count;
439 } else if (it->it_flags & FMODE_EXEC) {
440 och_p = &lli->lli_mds_exec_och;
441 och_usecount = &lli->lli_open_fd_exec_count;
443 och_p = &lli->lli_mds_read_och;
444 och_usecount = &lli->lli_open_fd_read_count;
446 /* Check for the proper lock. */
447 if (!ll_have_md_lock(inode, MDS_INODELOCK_LOOKUP))
449 down(&lli->lli_och_sem);
450 if (*och_p) { /* Everything is open already, do nothing */
451 /*(*och_usecount)++; Do not let them steal our open
452 handle from under us */
453 /* XXX The code above was my original idea, but in case
454 we have the handle, but we cannot use it due to later
455 checks (e.g. O_CREAT|O_EXCL flags set), nobody
456 would decrement counter increased here. So we just
457 hope the lock won't be invalidated in between. But
458 if it would be, we'll reopen the open request to
459 MDS later during file open path */
460 up(&lli->lli_och_sem);
461 ll_finish_md_op_data(op_data);
464 up(&lli->lli_och_sem);
468 if (it->it_op == IT_GETATTR)
469 first = ll_statahead_enter(de->d_parent->d_inode, &de, 0);
472 it->it_create_mode &= ~current->fs->umask;
473 it->it_flags |= O_CHECK_STALE;
474 rc = md_intent_lock(exp, op_data, NULL, 0, it,
476 &req, ll_md_blocking_ast, 0);
477 it->it_flags &= ~O_CHECK_STALE;
478 ll_finish_md_op_data(op_data);
479 if (it->it_op == IT_GETATTR && !first)
480 /* If there are too many locks on client-side, then some
481 * locks taken by statahead maybe dropped automatically
482 * before the real "revalidate" using them. */
483 ll_statahead_exit(de, req == NULL ? rc : 0);
484 else if (first == -EEXIST)
485 ll_statahead_mark(de);
487 /* If req is NULL, then md_intent_lock only tried to do a lock match;
488 * if all was well, it will return 1 if it found locks, 0 otherwise. */
489 if (req == NULL && rc >= 0) {
497 CDEBUG(D_INFO, "ll_intent_lock: rc %d : it->it_status "
498 "%d\n", rc, it->d.lustre.it_status);
500 #ifndef HAVE_VFS_INTENT_PATCHES
501 if (it_disposition(it, DISP_OPEN_OPEN) &&
502 !it_open_error(DISP_OPEN_OPEN, it))
503 /* server have valid open - close file first*/
504 ll_release_openhandle(de, it);
511 rc = ll_revalidate_it_finish(req, it, de);
513 if (rc != -ESTALE && rc != -ENOENT)
514 ll_intent_release(it);
518 if ((it->it_op & IT_OPEN) && de->d_inode &&
519 !S_ISREG(de->d_inode->i_mode) &&
520 !S_ISDIR(de->d_inode->i_mode)) {
521 ll_release_openhandle(de, it);
525 /* unfortunately ll_intent_lock may cause a callback and revoke our
527 spin_lock(&ll_lookup_lock);
528 spin_lock(&dcache_lock);
532 d_rehash_cond(de, 0);
533 spin_unlock(&dcache_lock);
534 spin_unlock(&ll_lookup_lock);
537 /* We do not free request as it may be reused during following lookup
538 * (see comment in mdc/mdc_locks.c::mdc_intent_lock()), request will
539 * be freed in ll_lookup_it or in ll_intent_release. But if
540 * request was not completed, we need to free it. (bug 5154, 9903) */
541 if (req != NULL && !it_disposition(it, DISP_ENQ_COMPLETE))
542 ptlrpc_req_finished(req);
544 #ifdef DCACHE_LUSTRE_INVALID
545 ll_unhash_aliases(de->d_inode);
546 /* done in ll_unhash_aliases()
547 dentry->d_flags |= DCACHE_LUSTRE_INVALID; */
549 /* We do not want d_invalidate to kill all child dentries too */
553 CDEBUG(D_DENTRY, "revalidated dentry %.*s (%p) parent %p "
554 "inode %p refc %d\n", de->d_name.len,
555 de->d_name.name, de, de->d_parent, de->d_inode,
556 atomic_read(&de->d_count));
557 ll_lookup_finish_locks(it, de);
558 #ifdef DCACHE_LUSTRE_INVALID
560 de->d_flags &= ~DCACHE_LUSTRE_INVALID;
567 * This part is here to combat evil-evil race in real_lookup on 2.6
568 * kernels. The race details are: We enter do_lookup() looking for some
569 * name, there is nothing in dcache for this name yet and d_lookup()
570 * returns NULL. We proceed to real_lookup(), and while we do this,
571 * another process does open on the same file we looking up (most simple
572 * reproducer), open succeeds and the dentry is added. Now back to
573 * us. In real_lookup() we do d_lookup() again and suddenly find the
574 * dentry, so we call d_revalidate on it, but there is no lock, so
575 * without this code we would return 0, but unpatched real_lookup just
576 * returns -ENOENT in such a case instead of retrying the lookup. Once
577 * this is dealt with in real_lookup(), all of this ugly mess can go and
578 * we can just check locks in ->d_revalidate without doing any RPCs
582 if (it != &lookup_it) {
583 /* MDS_INODELOCK_UPDATE needed for IT_GETATTR case. */
584 if (it->it_op == IT_GETATTR)
585 lookup_it.it_op = IT_GETATTR;
586 ll_lookup_finish_locks(it, de);
590 /* Do real lookup here. */
591 op_data = ll_prep_md_op_data(NULL, parent, NULL, de->d_name.name,
592 de->d_name.len, 0, (it->it_op & IT_CREAT ?
594 LUSTRE_OPC_ANY), NULL);
596 RETURN(PTR_ERR(op_data));
598 rc = md_intent_lock(exp, op_data, NULL, 0, it, 0, &req,
599 ll_md_blocking_ast, 0);
601 struct mdt_body *mdt_body;
602 struct lu_fid fid = {.f_seq = 0, .f_oid = 0, .f_ver = 0};
603 mdt_body = req_capsule_server_get(&req->rq_pill, &RMF_MDT_BODY);
606 fid = *ll_inode2fid(de->d_inode);
608 /* see if we got same inode, if not - return error */
609 if (lu_fid_eq(&fid, &mdt_body->fid1)) {
610 ll_finish_md_op_data(op_data);
612 goto revalidate_finish;
614 ll_intent_release(it);
616 ll_finish_md_op_data(op_data);
621 * For rc == 1 case, should not return directly to prevent losing
622 * statahead windows; for rc == 0 case, the "lookup" will be done later.
624 if (it && it->it_op == IT_GETATTR && rc == 1) {
625 first = ll_statahead_enter(de->d_parent->d_inode, &de, 0);
627 ll_statahead_exit(de, 1);
628 else if (first == -EEXIST)
629 ll_statahead_mark(de);
635 /*static*/ void ll_pin(struct dentry *de, struct vfsmount *mnt, int flag)
637 struct inode *inode= de->d_inode;
638 struct ll_sb_info *sbi = ll_i2sbi(inode);
639 struct ll_dentry_data *ldd = ll_d2d(de);
640 struct obd_client_handle *handle;
647 /* Strictly speaking this introduces an additional race: the
648 * increments should wait until the rpc has returned.
649 * However, given that at present the function is void, this
651 if (flag == 1 && (++ldd->lld_mnt_count) > 1) {
657 if (flag == 0 && (++ldd->lld_cwd_count) > 1) {
664 handle = (flag) ? &ldd->lld_mnt_och : &ldd->lld_cwd_och;
665 oc = ll_mdscapa_get(inode);
666 rc = obd_pin(sbi->ll_md_exp, ll_inode2fid(inode), oc, handle, flag);
670 memset(handle, 0, sizeof(*handle));
672 ldd->lld_cwd_count--;
674 ldd->lld_mnt_count--;
682 /*static*/ void ll_unpin(struct dentry *de, struct vfsmount *mnt, int flag)
684 struct ll_sb_info *sbi = ll_i2sbi(de->d_inode);
685 struct ll_dentry_data *ldd = ll_d2d(de);
686 struct obd_client_handle handle;
692 /* Strictly speaking this introduces an additional race: the
693 * increments should wait until the rpc has returned.
694 * However, given that at present the function is void, this
696 handle = (flag) ? ldd->lld_mnt_och : ldd->lld_cwd_och;
697 if (handle.och_magic != OBD_CLIENT_HANDLE_MAGIC) {
698 /* the "pin" failed */
705 count = --ldd->lld_mnt_count;
707 count = --ldd->lld_cwd_count;
715 rc = obd_unpin(sbi->ll_md_exp, &handle, flag);
720 #ifdef HAVE_VFS_INTENT_PATCHES
721 static int ll_revalidate_nd(struct dentry *dentry, struct nameidata *nd)
726 if (nd && nd->flags & LOOKUP_LAST && !(nd->flags & LOOKUP_LINK_NOTLAST))
727 rc = ll_revalidate_it(dentry, nd->flags, &nd->intent);
729 rc = ll_revalidate_it(dentry, 0, NULL);
734 int ll_revalidate_nd(struct dentry *dentry, struct nameidata *nd)
739 if (nd && !(nd->flags & (LOOKUP_CONTINUE|LOOKUP_PARENT))) {
740 struct lookup_intent *it;
741 it = ll_convert_intent(&nd->intent.open, nd->flags);
744 if (it->it_op == (IT_OPEN|IT_CREAT))
745 if (nd->intent.open.flags & O_EXCL) {
746 CDEBUG(D_VFSTRACE, "create O_EXCL, returning 0\n");
751 rc = ll_revalidate_it(dentry, nd->flags, it);
753 if (rc && (nd->flags & LOOKUP_OPEN) &&
754 it_disposition(it, DISP_OPEN_OPEN)) {/*Open*/
755 #ifdef HAVE_FILE_IN_STRUCT_INTENT
756 // XXX Code duplication with ll_lookup_nd
757 if (S_ISFIFO(dentry->d_inode->i_mode)) {
758 // We cannot call open here as it would
761 (struct ptlrpc_request *)
762 it->d.lustre.it_data);
764 #if (LINUX_VERSION_CODE < KERNEL_VERSION(2,6,17))
765 /* 2.6.1[456] have a bug in open_namei() that forgets to check
766 * nd->intent.open.file for error, so we need to return it as lookup's result
770 nd->intent.open.file->private_data = it;
771 filp = lookup_instantiate_filp(nd, dentry,NULL);
776 nd->intent.open.file->private_data = it;
777 (void)lookup_instantiate_filp(nd, dentry,NULL);
781 ll_release_openhandle(dentry, it);
782 #endif /* HAVE_FILE_IN_STRUCT_INTENT */
784 if (!rc && (nd->flags & LOOKUP_CREATE) &&
785 it_disposition(it, DISP_OPEN_CREATE)) {
786 /* We created something but we may only return
787 * negative dentry here, so save request in dentry,
788 * if lookup will be called later on, it will
789 * pick the request, otherwise it would be freed
791 ll_d2d(dentry)->lld_it = it;
792 it = NULL; /* avoid freeing */
797 ll_intent_release(it);
798 OBD_FREE(it, sizeof(*it));
801 rc = ll_revalidate_it(dentry, 0, NULL);
808 struct dentry_operations ll_d_ops = {
809 .d_revalidate = ll_revalidate_nd,
810 .d_release = ll_release,
811 .d_delete = ll_ddelete,
812 #ifdef DCACHE_LUSTRE_INVALID
813 .d_compare = ll_dcompare,