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 * need to get attributes in case it got changed from other client */
398 if (de == de->d_sb->s_root) {
399 rc = __ll_inode_revalidate_it(de, it, MDS_INODELOCK_LOOKUP);
405 if (d_mountpoint(de))
406 GOTO(out_sa, rc = 1);
408 exp = ll_i2mdexp(de->d_inode);
410 OBD_FAIL_TIMEOUT(OBD_FAIL_MDC_REVALIDATE_PAUSE, 5);
411 ll_frob_intent(&it, &lookup_it);
413 parent = de->d_parent->d_inode;
415 op_data = ll_prep_md_op_data(NULL, parent, de->d_inode,
416 de->d_name.name, de->d_name.len,
417 0, LUSTRE_OPC_ANY, NULL);
419 RETURN(PTR_ERR(op_data));
421 if ((it->it_op == IT_OPEN) && de->d_inode) {
422 struct inode *inode = de->d_inode;
423 struct ll_inode_info *lli = ll_i2info(inode);
424 struct obd_client_handle **och_p;
428 * We used to check for MDS_INODELOCK_OPEN here, but in fact
429 * just having LOOKUP lock is enough to justify inode is the
430 * same. And if inode is the same and we have suitable
431 * openhandle, then there is no point in doing another OPEN RPC
432 * just to throw away newly received openhandle. There are no
433 * security implications too, if file owner or access mode is
434 * change, LOOKUP lock is revoked.
438 if (it->it_flags & FMODE_WRITE) {
439 och_p = &lli->lli_mds_write_och;
440 och_usecount = &lli->lli_open_fd_write_count;
441 } else if (it->it_flags & FMODE_EXEC) {
442 och_p = &lli->lli_mds_exec_och;
443 och_usecount = &lli->lli_open_fd_exec_count;
445 och_p = &lli->lli_mds_read_och;
446 och_usecount = &lli->lli_open_fd_read_count;
448 /* Check for the proper lock. */
449 if (!ll_have_md_lock(inode, MDS_INODELOCK_LOOKUP))
451 down(&lli->lli_och_sem);
452 if (*och_p) { /* Everything is open already, do nothing */
453 /*(*och_usecount)++; Do not let them steal our open
454 handle from under us */
455 /* XXX The code above was my original idea, but in case
456 we have the handle, but we cannot use it due to later
457 checks (e.g. O_CREAT|O_EXCL flags set), nobody
458 would decrement counter increased here. So we just
459 hope the lock won't be invalidated in between. But
460 if it would be, we'll reopen the open request to
461 MDS later during file open path */
462 up(&lli->lli_och_sem);
463 ll_finish_md_op_data(op_data);
466 up(&lli->lli_och_sem);
470 if (it->it_op == IT_GETATTR)
471 first = ll_statahead_enter(de->d_parent->d_inode, &de, 0);
474 it->it_create_mode &= ~current->fs->umask;
475 it->it_create_mode |= M_CHECK_STALE;
476 rc = md_intent_lock(exp, op_data, NULL, 0, it,
478 &req, ll_md_blocking_ast, 0);
479 it->it_create_mode &= ~M_CHECK_STALE;
480 ll_finish_md_op_data(op_data);
481 if (it->it_op == IT_GETATTR && !first)
482 /* If there are too many locks on client-side, then some
483 * locks taken by statahead maybe dropped automatically
484 * before the real "revalidate" using them. */
485 ll_statahead_exit(de, req == NULL ? rc : 0);
486 else if (first == -EEXIST)
487 ll_statahead_mark(de);
489 /* If req is NULL, then md_intent_lock only tried to do a lock match;
490 * if all was well, it will return 1 if it found locks, 0 otherwise. */
491 if (req == NULL && rc >= 0) {
499 CDEBUG(D_INFO, "ll_intent_lock: rc %d : it->it_status "
500 "%d\n", rc, it->d.lustre.it_status);
502 #ifndef HAVE_VFS_INTENT_PATCHES
503 if (it_disposition(it, DISP_OPEN_OPEN) &&
504 !it_open_error(DISP_OPEN_OPEN, it))
505 /* server have valid open - close file first*/
506 ll_release_openhandle(de, it);
513 rc = ll_revalidate_it_finish(req, it, de);
515 if (rc != -ESTALE && rc != -ENOENT)
516 ll_intent_release(it);
520 if ((it->it_op & IT_OPEN) && de->d_inode &&
521 !S_ISREG(de->d_inode->i_mode) &&
522 !S_ISDIR(de->d_inode->i_mode)) {
523 ll_release_openhandle(de, it);
527 /* unfortunately ll_intent_lock may cause a callback and revoke our
529 spin_lock(&ll_lookup_lock);
530 spin_lock(&dcache_lock);
534 d_rehash_cond(de, 0);
535 spin_unlock(&dcache_lock);
536 spin_unlock(&ll_lookup_lock);
539 /* We do not free request as it may be reused during following lookup
540 * (see comment in mdc/mdc_locks.c::mdc_intent_lock()), request will
541 * be freed in ll_lookup_it or in ll_intent_release. But if
542 * request was not completed, we need to free it. (bug 5154, 9903) */
543 if (req != NULL && !it_disposition(it, DISP_ENQ_COMPLETE))
544 ptlrpc_req_finished(req);
546 #ifdef DCACHE_LUSTRE_INVALID
547 ll_unhash_aliases(de->d_inode);
548 /* done in ll_unhash_aliases()
549 dentry->d_flags |= DCACHE_LUSTRE_INVALID; */
551 /* We do not want d_invalidate to kill all child dentries too */
555 CDEBUG(D_DENTRY, "revalidated dentry %.*s (%p) parent %p "
556 "inode %p refc %d\n", de->d_name.len,
557 de->d_name.name, de, de->d_parent, de->d_inode,
558 atomic_read(&de->d_count));
559 ll_lookup_finish_locks(it, de);
560 #ifdef DCACHE_LUSTRE_INVALID
562 de->d_flags &= ~DCACHE_LUSTRE_INVALID;
569 * This part is here to combat evil-evil race in real_lookup on 2.6
570 * kernels. The race details are: We enter do_lookup() looking for some
571 * name, there is nothing in dcache for this name yet and d_lookup()
572 * returns NULL. We proceed to real_lookup(), and while we do this,
573 * another process does open on the same file we looking up (most simple
574 * reproducer), open succeeds and the dentry is added. Now back to
575 * us. In real_lookup() we do d_lookup() again and suddenly find the
576 * dentry, so we call d_revalidate on it, but there is no lock, so
577 * without this code we would return 0, but unpatched real_lookup just
578 * returns -ENOENT in such a case instead of retrying the lookup. Once
579 * this is dealt with in real_lookup(), all of this ugly mess can go and
580 * we can just check locks in ->d_revalidate without doing any RPCs
584 if (it != &lookup_it) {
585 /* MDS_INODELOCK_UPDATE needed for IT_GETATTR case. */
586 if (it->it_op == IT_GETATTR)
587 lookup_it.it_op = IT_GETATTR;
588 ll_lookup_finish_locks(it, de);
592 /* Do real lookup here. */
593 op_data = ll_prep_md_op_data(NULL, parent, NULL, de->d_name.name,
594 de->d_name.len, 0, (it->it_op & IT_CREAT ?
596 LUSTRE_OPC_ANY), NULL);
598 RETURN(PTR_ERR(op_data));
600 rc = md_intent_lock(exp, op_data, NULL, 0, it, 0, &req,
601 ll_md_blocking_ast, 0);
603 struct mdt_body *mdt_body;
604 struct lu_fid fid = {.f_seq = 0, .f_oid = 0, .f_ver = 0};
605 mdt_body = req_capsule_server_get(&req->rq_pill, &RMF_MDT_BODY);
608 fid = *ll_inode2fid(de->d_inode);
610 /* see if we got same inode, if not - return error */
611 if (lu_fid_eq(&fid, &mdt_body->fid1)) {
612 ll_finish_md_op_data(op_data);
614 goto revalidate_finish;
616 ll_intent_release(it);
618 ll_finish_md_op_data(op_data);
623 * For rc == 1 case, should not return directly to prevent losing
624 * statahead windows; for rc == 0 case, the "lookup" will be done later.
626 if (it && it->it_op == IT_GETATTR && rc == 1) {
627 first = ll_statahead_enter(de->d_parent->d_inode, &de, 0);
629 ll_statahead_exit(de, 1);
630 else if (first == -EEXIST)
631 ll_statahead_mark(de);
637 /*static*/ void ll_pin(struct dentry *de, struct vfsmount *mnt, int flag)
639 struct inode *inode= de->d_inode;
640 struct ll_sb_info *sbi = ll_i2sbi(inode);
641 struct ll_dentry_data *ldd = ll_d2d(de);
642 struct obd_client_handle *handle;
649 /* Strictly speaking this introduces an additional race: the
650 * increments should wait until the rpc has returned.
651 * However, given that at present the function is void, this
653 if (flag == 1 && (++ldd->lld_mnt_count) > 1) {
659 if (flag == 0 && (++ldd->lld_cwd_count) > 1) {
666 handle = (flag) ? &ldd->lld_mnt_och : &ldd->lld_cwd_och;
667 oc = ll_mdscapa_get(inode);
668 rc = obd_pin(sbi->ll_md_exp, ll_inode2fid(inode), oc, handle, flag);
672 memset(handle, 0, sizeof(*handle));
674 ldd->lld_cwd_count--;
676 ldd->lld_mnt_count--;
684 /*static*/ void ll_unpin(struct dentry *de, struct vfsmount *mnt, int flag)
686 struct ll_sb_info *sbi = ll_i2sbi(de->d_inode);
687 struct ll_dentry_data *ldd = ll_d2d(de);
688 struct obd_client_handle handle;
694 /* Strictly speaking this introduces an additional race: the
695 * increments should wait until the rpc has returned.
696 * However, given that at present the function is void, this
698 handle = (flag) ? ldd->lld_mnt_och : ldd->lld_cwd_och;
699 if (handle.och_magic != OBD_CLIENT_HANDLE_MAGIC) {
700 /* the "pin" failed */
707 count = --ldd->lld_mnt_count;
709 count = --ldd->lld_cwd_count;
717 rc = obd_unpin(sbi->ll_md_exp, &handle, flag);
722 #ifdef HAVE_VFS_INTENT_PATCHES
723 int ll_revalidate_nd(struct dentry *dentry, struct nameidata *nd)
728 if (nd && nd->flags & LOOKUP_LAST && !(nd->flags & LOOKUP_LINK_NOTLAST))
729 rc = ll_revalidate_it(dentry, nd->flags, &nd->intent);
731 rc = ll_revalidate_it(dentry, 0, NULL);
736 int ll_revalidate_nd(struct dentry *dentry, struct nameidata *nd)
741 if (nd && !(nd->flags & (LOOKUP_CONTINUE|LOOKUP_PARENT))) {
742 struct lookup_intent *it;
743 it = ll_convert_intent(&nd->intent.open, nd->flags);
746 if (it->it_op == (IT_OPEN|IT_CREAT))
747 if (nd->intent.open.flags & O_EXCL) {
748 CDEBUG(D_VFSTRACE, "create O_EXCL, returning 0\n");
753 rc = ll_revalidate_it(dentry, nd->flags, it);
755 if (rc && (nd->flags & LOOKUP_OPEN) &&
756 it_disposition(it, DISP_OPEN_OPEN)) {/*Open*/
757 #ifdef HAVE_FILE_IN_STRUCT_INTENT
758 // XXX Code duplication with ll_lookup_nd
759 if (S_ISFIFO(dentry->d_inode->i_mode)) {
760 // We cannot call open here as it would
763 (struct ptlrpc_request *)
764 it->d.lustre.it_data);
766 #if (LINUX_VERSION_CODE < KERNEL_VERSION(2,6,17))
767 /* 2.6.1[456] have a bug in open_namei() that forgets to check
768 * nd->intent.open.file for error, so we need to return it as lookup's result
772 nd->intent.open.file->private_data = it;
773 filp = lookup_instantiate_filp(nd, dentry,NULL);
778 nd->intent.open.file->private_data = it;
779 (void)lookup_instantiate_filp(nd, dentry,NULL);
783 ll_release_openhandle(dentry, it);
784 #endif /* HAVE_FILE_IN_STRUCT_INTENT */
786 if (!rc && (nd->flags & LOOKUP_CREATE) &&
787 it_disposition(it, DISP_OPEN_CREATE)) {
788 /* We created something but we may only return
789 * negative dentry here, so save request in dentry,
790 * if lookup will be called later on, it will
791 * pick the request, otherwise it would be freed
793 ll_d2d(dentry)->lld_it = it;
794 it = NULL; /* avoid freeing */
799 ll_intent_release(it);
800 OBD_FREE(it, sizeof(*it));
803 rc = ll_revalidate_it(dentry, 0, NULL);
810 struct dentry_operations ll_d_ops = {
811 .d_revalidate = ll_revalidate_nd,
812 .d_release = ll_release,
813 .d_delete = ll_ddelete,
814 #ifdef DCACHE_LUSTRE_INVALID
815 .d_compare = ll_dcompare,