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 /* Never execute intents for mount points.
397 * Attributes will be fixed up in ll_inode_revalidate_it */
398 if (d_mountpoint(de))
399 GOTO(out_sa, rc = 1);
401 /* need to get attributes in case root got changed from other client */
402 if (de == de->d_sb->s_root) {
403 rc = __ll_inode_revalidate_it(de, it, MDS_INODELOCK_LOOKUP);
409 exp = ll_i2mdexp(de->d_inode);
411 OBD_FAIL_TIMEOUT(OBD_FAIL_MDC_REVALIDATE_PAUSE, 5);
412 ll_frob_intent(&it, &lookup_it);
414 parent = de->d_parent->d_inode;
416 op_data = ll_prep_md_op_data(NULL, parent, de->d_inode,
417 de->d_name.name, de->d_name.len,
418 0, LUSTRE_OPC_ANY, NULL);
420 RETURN(PTR_ERR(op_data));
422 if ((it->it_op == IT_OPEN) && de->d_inode) {
423 struct inode *inode = de->d_inode;
424 struct ll_inode_info *lli = ll_i2info(inode);
425 struct obd_client_handle **och_p;
429 * We used to check for MDS_INODELOCK_OPEN here, but in fact
430 * just having LOOKUP lock is enough to justify inode is the
431 * same. And if inode is the same and we have suitable
432 * openhandle, then there is no point in doing another OPEN RPC
433 * just to throw away newly received openhandle. There are no
434 * security implications too, if file owner or access mode is
435 * change, LOOKUP lock is revoked.
439 if (it->it_flags & FMODE_WRITE) {
440 och_p = &lli->lli_mds_write_och;
441 och_usecount = &lli->lli_open_fd_write_count;
442 } else if (it->it_flags & FMODE_EXEC) {
443 och_p = &lli->lli_mds_exec_och;
444 och_usecount = &lli->lli_open_fd_exec_count;
446 och_p = &lli->lli_mds_read_och;
447 och_usecount = &lli->lli_open_fd_read_count;
449 /* Check for the proper lock. */
450 if (!ll_have_md_lock(inode, MDS_INODELOCK_LOOKUP))
452 down(&lli->lli_och_sem);
453 if (*och_p) { /* Everything is open already, do nothing */
454 /*(*och_usecount)++; Do not let them steal our open
455 handle from under us */
456 /* XXX The code above was my original idea, but in case
457 we have the handle, but we cannot use it due to later
458 checks (e.g. O_CREAT|O_EXCL flags set), nobody
459 would decrement counter increased here. So we just
460 hope the lock won't be invalidated in between. But
461 if it would be, we'll reopen the open request to
462 MDS later during file open path */
463 up(&lli->lli_och_sem);
464 ll_finish_md_op_data(op_data);
467 up(&lli->lli_och_sem);
471 if (it->it_op == IT_GETATTR)
472 first = ll_statahead_enter(de->d_parent->d_inode, &de, 0);
475 it->it_create_mode &= ~current->fs->umask;
476 it->it_create_mode |= M_CHECK_STALE;
477 rc = md_intent_lock(exp, op_data, NULL, 0, it,
479 &req, ll_md_blocking_ast, 0);
480 it->it_create_mode &= ~M_CHECK_STALE;
481 ll_finish_md_op_data(op_data);
482 if (it->it_op == IT_GETATTR && !first)
483 /* If there are too many locks on client-side, then some
484 * locks taken by statahead maybe dropped automatically
485 * before the real "revalidate" using them. */
486 ll_statahead_exit(de, req == NULL ? rc : 0);
487 else if (first == -EEXIST)
488 ll_statahead_mark(de);
490 /* If req is NULL, then md_intent_lock only tried to do a lock match;
491 * if all was well, it will return 1 if it found locks, 0 otherwise. */
492 if (req == NULL && rc >= 0) {
500 CDEBUG(D_INFO, "ll_intent_lock: rc %d : it->it_status "
501 "%d\n", rc, it->d.lustre.it_status);
503 #ifndef HAVE_VFS_INTENT_PATCHES
504 if (it_disposition(it, DISP_OPEN_OPEN) &&
505 !it_open_error(DISP_OPEN_OPEN, it))
506 /* server have valid open - close file first*/
507 ll_release_openhandle(de, it);
514 rc = ll_revalidate_it_finish(req, it, de);
516 if (rc != -ESTALE && rc != -ENOENT)
517 ll_intent_release(it);
521 if ((it->it_op & IT_OPEN) && de->d_inode &&
522 !S_ISREG(de->d_inode->i_mode) &&
523 !S_ISDIR(de->d_inode->i_mode)) {
524 ll_release_openhandle(de, it);
528 /* unfortunately ll_intent_lock may cause a callback and revoke our
530 spin_lock(&ll_lookup_lock);
531 spin_lock(&dcache_lock);
535 d_rehash_cond(de, 0);
536 spin_unlock(&dcache_lock);
537 spin_unlock(&ll_lookup_lock);
540 /* We do not free request as it may be reused during following lookup
541 * (see comment in mdc/mdc_locks.c::mdc_intent_lock()), request will
542 * be freed in ll_lookup_it or in ll_intent_release. But if
543 * request was not completed, we need to free it. (bug 5154, 9903) */
544 if (req != NULL && !it_disposition(it, DISP_ENQ_COMPLETE))
545 ptlrpc_req_finished(req);
547 #ifdef DCACHE_LUSTRE_INVALID
548 ll_unhash_aliases(de->d_inode);
549 /* done in ll_unhash_aliases()
550 dentry->d_flags |= DCACHE_LUSTRE_INVALID; */
552 /* We do not want d_invalidate to kill all child dentries too */
556 CDEBUG(D_DENTRY, "revalidated dentry %.*s (%p) parent %p "
557 "inode %p refc %d\n", de->d_name.len,
558 de->d_name.name, de, de->d_parent, de->d_inode,
559 atomic_read(&de->d_count));
560 ll_lookup_finish_locks(it, de);
561 #ifdef DCACHE_LUSTRE_INVALID
563 de->d_flags &= ~DCACHE_LUSTRE_INVALID;
570 * This part is here to combat evil-evil race in real_lookup on 2.6
571 * kernels. The race details are: We enter do_lookup() looking for some
572 * name, there is nothing in dcache for this name yet and d_lookup()
573 * returns NULL. We proceed to real_lookup(), and while we do this,
574 * another process does open on the same file we looking up (most simple
575 * reproducer), open succeeds and the dentry is added. Now back to
576 * us. In real_lookup() we do d_lookup() again and suddenly find the
577 * dentry, so we call d_revalidate on it, but there is no lock, so
578 * without this code we would return 0, but unpatched real_lookup just
579 * returns -ENOENT in such a case instead of retrying the lookup. Once
580 * this is dealt with in real_lookup(), all of this ugly mess can go and
581 * we can just check locks in ->d_revalidate without doing any RPCs
585 if (it != &lookup_it) {
586 /* MDS_INODELOCK_UPDATE needed for IT_GETATTR case. */
587 if (it->it_op == IT_GETATTR)
588 lookup_it.it_op = IT_GETATTR;
589 ll_lookup_finish_locks(it, de);
593 /* Do real lookup here. */
594 op_data = ll_prep_md_op_data(NULL, parent, NULL, de->d_name.name,
595 de->d_name.len, 0, (it->it_op & IT_CREAT ?
597 LUSTRE_OPC_ANY), NULL);
599 RETURN(PTR_ERR(op_data));
601 rc = md_intent_lock(exp, op_data, NULL, 0, it, 0, &req,
602 ll_md_blocking_ast, 0);
604 struct mdt_body *mdt_body;
605 struct lu_fid fid = {.f_seq = 0, .f_oid = 0, .f_ver = 0};
606 mdt_body = req_capsule_server_get(&req->rq_pill, &RMF_MDT_BODY);
609 fid = *ll_inode2fid(de->d_inode);
611 /* see if we got same inode, if not - return error */
612 if (lu_fid_eq(&fid, &mdt_body->fid1)) {
613 ll_finish_md_op_data(op_data);
615 goto revalidate_finish;
617 ll_intent_release(it);
619 ll_finish_md_op_data(op_data);
624 * For rc == 1 case, should not return directly to prevent losing
625 * statahead windows; for rc == 0 case, the "lookup" will be done later.
627 if (it && it->it_op == IT_GETATTR && rc == 1) {
628 first = ll_statahead_enter(de->d_parent->d_inode, &de, 0);
630 ll_statahead_exit(de, 1);
631 else if (first == -EEXIST)
632 ll_statahead_mark(de);
638 /*static*/ void ll_pin(struct dentry *de, struct vfsmount *mnt, int flag)
640 struct inode *inode= de->d_inode;
641 struct ll_sb_info *sbi = ll_i2sbi(inode);
642 struct ll_dentry_data *ldd = ll_d2d(de);
643 struct obd_client_handle *handle;
650 /* Strictly speaking this introduces an additional race: the
651 * increments should wait until the rpc has returned.
652 * However, given that at present the function is void, this
654 if (flag == 1 && (++ldd->lld_mnt_count) > 1) {
660 if (flag == 0 && (++ldd->lld_cwd_count) > 1) {
667 handle = (flag) ? &ldd->lld_mnt_och : &ldd->lld_cwd_och;
668 oc = ll_mdscapa_get(inode);
669 rc = obd_pin(sbi->ll_md_exp, ll_inode2fid(inode), oc, handle, flag);
673 memset(handle, 0, sizeof(*handle));
675 ldd->lld_cwd_count--;
677 ldd->lld_mnt_count--;
685 /*static*/ void ll_unpin(struct dentry *de, struct vfsmount *mnt, int flag)
687 struct ll_sb_info *sbi = ll_i2sbi(de->d_inode);
688 struct ll_dentry_data *ldd = ll_d2d(de);
689 struct obd_client_handle handle;
695 /* Strictly speaking this introduces an additional race: the
696 * increments should wait until the rpc has returned.
697 * However, given that at present the function is void, this
699 handle = (flag) ? ldd->lld_mnt_och : ldd->lld_cwd_och;
700 if (handle.och_magic != OBD_CLIENT_HANDLE_MAGIC) {
701 /* the "pin" failed */
708 count = --ldd->lld_mnt_count;
710 count = --ldd->lld_cwd_count;
718 rc = obd_unpin(sbi->ll_md_exp, &handle, flag);
723 #ifdef HAVE_VFS_INTENT_PATCHES
724 int ll_revalidate_nd(struct dentry *dentry, struct nameidata *nd)
729 if (nd && nd->flags & LOOKUP_LAST && !(nd->flags & LOOKUP_LINK_NOTLAST))
730 rc = ll_revalidate_it(dentry, nd->flags, &nd->intent);
732 rc = ll_revalidate_it(dentry, 0, NULL);
737 int ll_revalidate_nd(struct dentry *dentry, struct nameidata *nd)
742 if (nd && !(nd->flags & (LOOKUP_CONTINUE|LOOKUP_PARENT))) {
743 struct lookup_intent *it;
744 it = ll_convert_intent(&nd->intent.open, nd->flags);
747 if (it->it_op == (IT_OPEN|IT_CREAT))
748 if (nd->intent.open.flags & O_EXCL) {
749 CDEBUG(D_VFSTRACE, "create O_EXCL, returning 0\n");
754 rc = ll_revalidate_it(dentry, nd->flags, it);
756 if (rc && (nd->flags & LOOKUP_OPEN) &&
757 it_disposition(it, DISP_OPEN_OPEN)) {/*Open*/
758 #ifdef HAVE_FILE_IN_STRUCT_INTENT
759 // XXX Code duplication with ll_lookup_nd
760 if (S_ISFIFO(dentry->d_inode->i_mode)) {
761 // We cannot call open here as it would
764 (struct ptlrpc_request *)
765 it->d.lustre.it_data);
767 #if (LINUX_VERSION_CODE < KERNEL_VERSION(2,6,17))
768 /* 2.6.1[456] have a bug in open_namei() that forgets to check
769 * nd->intent.open.file for error, so we need to return it as lookup's result
773 nd->intent.open.file->private_data = it;
774 filp = lookup_instantiate_filp(nd, dentry,NULL);
779 nd->intent.open.file->private_data = it;
780 (void)lookup_instantiate_filp(nd, dentry,NULL);
784 ll_release_openhandle(dentry, it);
785 #endif /* HAVE_FILE_IN_STRUCT_INTENT */
787 if (!rc && (nd->flags & LOOKUP_CREATE) &&
788 it_disposition(it, DISP_OPEN_CREATE)) {
789 /* We created something but we may only return
790 * negative dentry here, so save request in dentry,
791 * if lookup will be called later on, it will
792 * pick the request, otherwise it would be freed
794 ll_d2d(dentry)->lld_it = it;
795 it = NULL; /* avoid freeing */
800 ll_intent_release(it);
801 OBD_FREE(it, sizeof(*it));
804 rc = ll_revalidate_it(dentry, 0, NULL);
811 struct dentry_operations ll_d_ops = {
812 .d_revalidate = ll_revalidate_nd,
813 .d_release = ll_release,
814 .d_delete = ll_ddelete,
815 #ifdef DCACHE_LUSTRE_INVALID
816 .d_compare = ll_dcompare,