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 cfs_spinlock_t ll_lookup_lock = CFS_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 /* Compare if two dentries are the same. Don't match if the existing dentry
81 * is marked DCACHE_LUSTRE_INVALID. Returns 1 if different, 0 if the same.
83 * This avoids a race where ll_lookup_it() instantiates a dentry, but we get
84 * an AST before calling d_revalidate_it(). The dentry still exists (marked
85 * INVALID) so d_lookup() matches it, but we have no lock on it (so
86 * lock_match() fails) and we spin around real_lookup(). */
87 int ll_dcompare(struct dentry *parent, struct qstr *d_name, struct qstr *name)
89 struct dentry *dchild;
92 if (d_name->len != name->len)
95 if (memcmp(d_name->name, name->name, name->len))
98 /* XXX: d_name must be in-dentry structure */
99 dchild = container_of(d_name, struct dentry, d_name); /* ugh */
101 CDEBUG(D_DENTRY,"found name %.*s(%p) - flags %d/%x - refc %d\n",
102 name->len, name->name, dchild,
103 d_mountpoint(dchild), dchild->d_flags & DCACHE_LUSTRE_INVALID,
104 atomic_read(&dchild->d_count));
106 /* mountpoint is always valid */
107 if (d_mountpoint(dchild))
110 if (dchild->d_flags & DCACHE_LUSTRE_INVALID)
117 static inline int return_if_equal(struct ldlm_lock *lock, void *data)
119 return LDLM_ITER_STOP;
122 /* find any ldlm lock of the inode in mdc and lov
126 static int find_cbdata(struct inode *inode)
128 struct ll_inode_info *lli = ll_i2info(inode);
129 struct ll_sb_info *sbi = ll_i2sbi(inode);
134 rc = md_find_cbdata(sbi->ll_md_exp, ll_inode2fid(inode),
135 return_if_equal, NULL);
140 rc = obd_find_cbdata(sbi->ll_dt_exp, lli->lli_smd,
141 return_if_equal, NULL);
146 /* should NOT be called with the dcache lock, see fs/dcache.c */
147 static int ll_ddelete(struct dentry *de)
152 CDEBUG(D_DENTRY, "%s dentry %.*s (%p, parent %p, inode %p) %s%s\n",
153 (de->d_flags & DCACHE_LUSTRE_INVALID ? "deleting" : "keeping"),
154 de->d_name.len, de->d_name.name, de, de->d_parent, de->d_inode,
155 d_unhashed(de) ? "" : "hashed,",
156 list_empty(&de->d_subdirs) ? "" : "subdirs");
158 /* if not ldlm lock for this inode, set i_nlink to 0 so that
159 * this inode can be recycled later b=20433 */
160 LASSERT(atomic_read(&de->d_count) == 0);
161 if (de->d_inode && !find_cbdata(de->d_inode))
162 de->d_inode->i_nlink = 0;
164 if (de->d_flags & DCACHE_LUSTRE_INVALID)
170 int ll_set_dd(struct dentry *de)
175 CDEBUG(D_DENTRY, "ldd on dentry %.*s (%p) parent %p inode %p refc %d\n",
176 de->d_name.len, de->d_name.name, de, de->d_parent, de->d_inode,
177 atomic_read(&de->d_count));
179 if (de->d_fsdata == NULL) {
180 struct ll_dentry_data *lld;
183 if (likely(lld != NULL)) {
184 CFS_INIT_LIST_HEAD(&lld->lld_sa_alias);
186 if (likely(de->d_fsdata == NULL))
199 void ll_intent_drop_lock(struct lookup_intent *it)
201 struct lustre_handle *handle;
203 if (it->it_op && it->d.lustre.it_lock_mode) {
204 handle = (struct lustre_handle *)&it->d.lustre.it_lock_handle;
205 CDEBUG(D_DLMTRACE, "releasing lock with cookie "LPX64
206 " from it %p\n", handle->cookie, it);
207 ldlm_lock_decref(handle, it->d.lustre.it_lock_mode);
209 /* bug 494: intent_release may be called multiple times, from
210 * this thread and we don't want to double-decref this lock */
211 it->d.lustre.it_lock_mode = 0;
215 void ll_intent_release(struct lookup_intent *it)
219 CDEBUG(D_INFO, "intent %p released\n", it);
220 ll_intent_drop_lock(it);
221 #ifdef HAVE_VFS_INTENT_PATCHES
223 it->it_op_release = 0;
225 /* We are still holding extra reference on a request, need to free it */
226 if (it_disposition(it, DISP_ENQ_OPEN_REF))
227 ptlrpc_req_finished(it->d.lustre.it_data); /* ll_file_open */
228 if (it_disposition(it, DISP_ENQ_CREATE_REF)) /* create rec */
229 ptlrpc_req_finished(it->d.lustre.it_data);
230 if (it_disposition(it, DISP_ENQ_COMPLETE)) /* saved req from revalidate
232 ptlrpc_req_finished(it->d.lustre.it_data);
234 it->d.lustre.it_disposition = 0;
235 it->d.lustre.it_data = NULL;
239 /* Drop dentry if it is not used already, unhash otherwise.
240 Should be called with dcache lock held!
241 Returns: 1 if dentry was dropped, 0 if unhashed. */
242 int ll_drop_dentry(struct dentry *dentry)
245 if (atomic_read(&dentry->d_count) == 0) {
246 CDEBUG(D_DENTRY, "deleting dentry %.*s (%p) parent %p "
247 "inode %p\n", dentry->d_name.len,
248 dentry->d_name.name, dentry, dentry->d_parent,
252 unlock_dentry(dentry);
253 spin_unlock(&dcache_lock);
254 cfs_spin_unlock(&ll_lookup_lock);
256 cfs_spin_lock(&ll_lookup_lock);
257 spin_lock(&dcache_lock);
260 /* disconected dentry can not be find without lookup, because we
261 * not need his to unhash or mark invalid. */
262 if (dentry->d_flags & DCACHE_DISCONNECTED) {
263 unlock_dentry(dentry);
267 if (!(dentry->d_flags & DCACHE_LUSTRE_INVALID)) {
268 CDEBUG(D_DENTRY, "unhashing dentry %.*s (%p) parent %p "
269 "inode %p refc %d\n", dentry->d_name.len,
270 dentry->d_name.name, dentry, dentry->d_parent,
271 dentry->d_inode, atomic_read(&dentry->d_count));
272 /* actually we don't unhash the dentry, rather just
273 * mark it inaccessible for to __d_lookup(). otherwise
274 * sys_getcwd() could return -ENOENT -bzzz */
275 dentry->d_flags |= DCACHE_LUSTRE_INVALID;
276 if (!dentry->d_inode || !S_ISDIR(dentry->d_inode->i_mode))
279 unlock_dentry(dentry);
283 void ll_unhash_aliases(struct inode *inode)
285 struct list_head *tmp, *head;
289 CERROR("unexpected NULL inode, tell phil\n");
293 CDEBUG(D_INODE, "marking dentries for ino %lu/%u(%p) invalid\n",
294 inode->i_ino, inode->i_generation, inode);
296 head = &inode->i_dentry;
297 cfs_spin_lock(&ll_lookup_lock);
298 spin_lock(&dcache_lock);
301 while ((tmp = tmp->next) != head) {
302 struct dentry *dentry = list_entry(tmp, struct dentry, d_alias);
304 CDEBUG(D_DENTRY, "dentry in drop %.*s (%p) parent %p "
305 "inode %p flags %d\n", dentry->d_name.len,
306 dentry->d_name.name, dentry, dentry->d_parent,
307 dentry->d_inode, dentry->d_flags);
309 if (dentry->d_name.len == 1 && dentry->d_name.name[0] == '/') {
310 CERROR("called on root (?) dentry=%p, inode=%p "
311 "ino=%lu\n", dentry, inode, inode->i_ino);
312 lustre_dump_dentry(dentry, 1);
313 libcfs_debug_dumpstack(NULL);
316 if (ll_drop_dentry(dentry))
319 spin_unlock(&dcache_lock);
320 cfs_spin_unlock(&ll_lookup_lock);
325 int ll_revalidate_it_finish(struct ptlrpc_request *request,
326 struct lookup_intent *it,
335 if (it_disposition(it, DISP_LOOKUP_NEG))
338 rc = ll_prep_inode(&de->d_inode, request, NULL);
343 void ll_lookup_finish_locks(struct lookup_intent *it, struct dentry *dentry)
346 LASSERT(dentry != NULL);
348 if (it->d.lustre.it_lock_mode && dentry->d_inode != NULL) {
349 struct inode *inode = dentry->d_inode;
350 struct ll_sb_info *sbi = ll_i2sbi(dentry->d_inode);
352 CDEBUG(D_DLMTRACE, "setting l_data to inode %p (%lu/%u)\n",
353 inode, inode->i_ino, inode->i_generation);
354 md_set_lock_data(sbi->ll_md_exp, &it->d.lustre.it_lock_handle,
358 /* drop lookup or getattr locks immediately */
359 if (it->it_op == IT_LOOKUP || it->it_op == IT_GETATTR) {
360 /* on 2.6 there are situation when several lookups and
361 * revalidations may be requested during single operation.
362 * therefore, we don't release intent here -bzzz */
363 ll_intent_drop_lock(it);
367 void ll_frob_intent(struct lookup_intent **itp, struct lookup_intent *deft)
369 struct lookup_intent *it = *itp;
370 #ifdef HAVE_VFS_INTENT_PATCHES
372 LASSERTF(it->it_magic == INTENT_MAGIC,
373 "%p has bad intent magic: %x\n",
378 if (!it || it->it_op == IT_GETXATTR)
381 #ifdef HAVE_VFS_INTENT_PATCHES
382 it->it_op_release = ll_intent_release;
386 int ll_revalidate_it(struct dentry *de, int lookup_flags,
387 struct lookup_intent *it)
389 struct md_op_data *op_data;
390 struct ptlrpc_request *req = NULL;
391 struct lookup_intent lookup_it = { .it_op = IT_LOOKUP };
392 struct obd_export *exp;
393 struct inode *parent = de->d_parent->d_inode;
397 CDEBUG(D_VFSTRACE, "VFS Op:name=%s,intent=%s\n", de->d_name.name,
400 if (de->d_inode == NULL) {
401 /* We can only use negative dentries if this is stat or lookup,
402 for opens and stuff we do need to query server. */
403 /* If there is IT_CREAT in intent op set, then we must throw
404 away this negative dentry and actually do the request to
405 kernel to create whatever needs to be created (if possible)*/
406 if (it && (it->it_op & IT_CREAT))
409 if (de->d_flags & DCACHE_LUSTRE_INVALID)
412 rc = ll_have_md_lock(parent, MDS_INODELOCK_UPDATE);
416 /* Never execute intents for mount points.
417 * Attributes will be fixed up in ll_inode_revalidate_it */
418 if (d_mountpoint(de))
419 GOTO(out_sa, rc = 1);
421 /* need to get attributes in case root got changed from other client */
422 if (de == de->d_sb->s_root) {
423 rc = __ll_inode_revalidate_it(de, it, MDS_INODELOCK_LOOKUP);
429 exp = ll_i2mdexp(de->d_inode);
431 OBD_FAIL_TIMEOUT(OBD_FAIL_MDC_REVALIDATE_PAUSE, 5);
432 ll_frob_intent(&it, &lookup_it);
435 if (it->it_op == IT_LOOKUP && !(de->d_flags & DCACHE_LUSTRE_INVALID))
436 GOTO(out_sa, rc = 1);
438 op_data = ll_prep_md_op_data(NULL, parent, de->d_inode,
439 de->d_name.name, de->d_name.len,
440 0, LUSTRE_OPC_ANY, NULL);
442 RETURN(PTR_ERR(op_data));
444 if ((it->it_op == IT_OPEN) && de->d_inode) {
445 struct inode *inode = de->d_inode;
446 struct ll_inode_info *lli = ll_i2info(inode);
447 struct obd_client_handle **och_p;
451 * We used to check for MDS_INODELOCK_OPEN here, but in fact
452 * just having LOOKUP lock is enough to justify inode is the
453 * same. And if inode is the same and we have suitable
454 * openhandle, then there is no point in doing another OPEN RPC
455 * just to throw away newly received openhandle. There are no
456 * security implications too, if file owner or access mode is
457 * change, LOOKUP lock is revoked.
461 if (it->it_flags & FMODE_WRITE) {
462 och_p = &lli->lli_mds_write_och;
463 och_usecount = &lli->lli_open_fd_write_count;
464 } else if (it->it_flags & FMODE_EXEC) {
465 och_p = &lli->lli_mds_exec_och;
466 och_usecount = &lli->lli_open_fd_exec_count;
468 och_p = &lli->lli_mds_read_och;
469 och_usecount = &lli->lli_open_fd_read_count;
471 /* Check for the proper lock. */
472 if (!ll_have_md_lock(inode, MDS_INODELOCK_LOOKUP))
474 cfs_down(&lli->lli_och_sem);
475 if (*och_p) { /* Everything is open already, do nothing */
476 /*(*och_usecount)++; Do not let them steal our open
477 handle from under us */
478 /* XXX The code above was my original idea, but in case
479 we have the handle, but we cannot use it due to later
480 checks (e.g. O_CREAT|O_EXCL flags set), nobody
481 would decrement counter increased here. So we just
482 hope the lock won't be invalidated in between. But
483 if it would be, we'll reopen the open request to
484 MDS later during file open path */
485 cfs_up(&lli->lli_och_sem);
486 ll_finish_md_op_data(op_data);
489 cfs_up(&lli->lli_och_sem);
493 if (it->it_op == IT_GETATTR) {
494 first = ll_statahead_enter(parent, &de, 0);
496 ll_statahead_exit(parent, de, 1);
497 ll_finish_md_op_data(op_data);
503 it->it_create_mode &= ~current->fs->umask;
504 it->it_create_mode |= M_CHECK_STALE;
505 rc = md_intent_lock(exp, op_data, NULL, 0, it,
507 &req, ll_md_blocking_ast, 0);
508 it->it_create_mode &= ~M_CHECK_STALE;
509 ll_finish_md_op_data(op_data);
510 if (it->it_op == IT_GETATTR && !first)
511 /* If there are too many locks on client-side, then some
512 * locks taken by statahead maybe dropped automatically
513 * before the real "revalidate" using them. */
514 ll_statahead_exit(parent, de, req == NULL ? rc : 0);
515 else if (first == -EEXIST)
516 ll_statahead_mark(parent, de);
518 /* If req is NULL, then md_intent_lock only tried to do a lock match;
519 * if all was well, it will return 1 if it found locks, 0 otherwise. */
520 if (req == NULL && rc >= 0) {
528 CDEBUG(D_INFO, "ll_intent_lock: rc %d : it->it_status "
529 "%d\n", rc, it->d.lustre.it_status);
535 rc = ll_revalidate_it_finish(req, it, de);
537 if (rc != -ESTALE && rc != -ENOENT)
538 ll_intent_release(it);
542 if ((it->it_op & IT_OPEN) && de->d_inode &&
543 !S_ISREG(de->d_inode->i_mode) &&
544 !S_ISDIR(de->d_inode->i_mode)) {
545 ll_release_openhandle(de, it);
549 /* unfortunately ll_intent_lock may cause a callback and revoke our
551 cfs_spin_lock(&ll_lookup_lock);
552 spin_lock(&dcache_lock);
556 d_rehash_cond(de, 0);
557 spin_unlock(&dcache_lock);
558 cfs_spin_unlock(&ll_lookup_lock);
561 /* We do not free request as it may be reused during following lookup
562 * (see comment in mdc/mdc_locks.c::mdc_intent_lock()), request will
563 * be freed in ll_lookup_it or in ll_intent_release. But if
564 * request was not completed, we need to free it. (bug 5154, 9903) */
565 if (req != NULL && !it_disposition(it, DISP_ENQ_COMPLETE))
566 ptlrpc_req_finished(req);
568 ll_unhash_aliases(de->d_inode);
569 /* done in ll_unhash_aliases()
570 dentry->d_flags |= DCACHE_LUSTRE_INVALID; */
572 CDEBUG(D_DENTRY, "revalidated dentry %.*s (%p) parent %p "
573 "inode %p refc %d\n", de->d_name.len,
574 de->d_name.name, de, de->d_parent, de->d_inode,
575 atomic_read(&de->d_count));
577 if (de->d_flags & DCACHE_LUSTRE_INVALID) {
579 de->d_flags &= ~DCACHE_LUSTRE_INVALID;
582 ll_lookup_finish_locks(it, de);
588 * This part is here to combat evil-evil race in real_lookup on 2.6
589 * kernels. The race details are: We enter do_lookup() looking for some
590 * name, there is nothing in dcache for this name yet and d_lookup()
591 * returns NULL. We proceed to real_lookup(), and while we do this,
592 * another process does open on the same file we looking up (most simple
593 * reproducer), open succeeds and the dentry is added. Now back to
594 * us. In real_lookup() we do d_lookup() again and suddenly find the
595 * dentry, so we call d_revalidate on it, but there is no lock, so
596 * without this code we would return 0, but unpatched real_lookup just
597 * returns -ENOENT in such a case instead of retrying the lookup. Once
598 * this is dealt with in real_lookup(), all of this ugly mess can go and
599 * we can just check locks in ->d_revalidate without doing any RPCs
603 if (it != &lookup_it) {
604 /* MDS_INODELOCK_UPDATE needed for IT_GETATTR case. */
605 if (it->it_op == IT_GETATTR)
606 lookup_it.it_op = IT_GETATTR;
607 ll_lookup_finish_locks(it, de);
611 /* Do real lookup here. */
612 op_data = ll_prep_md_op_data(NULL, parent, NULL, de->d_name.name,
613 de->d_name.len, 0, (it->it_op & IT_CREAT ?
615 LUSTRE_OPC_ANY), NULL);
617 RETURN(PTR_ERR(op_data));
619 rc = md_intent_lock(exp, op_data, NULL, 0, it, 0, &req,
620 ll_md_blocking_ast, 0);
622 struct mdt_body *mdt_body;
623 struct lu_fid fid = {.f_seq = 0, .f_oid = 0, .f_ver = 0};
624 mdt_body = req_capsule_server_get(&req->rq_pill, &RMF_MDT_BODY);
627 fid = *ll_inode2fid(de->d_inode);
629 /* see if we got same inode, if not - return error */
630 if (lu_fid_eq(&fid, &mdt_body->fid1)) {
631 ll_finish_md_op_data(op_data);
633 goto revalidate_finish;
635 ll_intent_release(it);
637 ll_finish_md_op_data(op_data);
642 * For rc == 1 case, should not return directly to prevent losing
643 * statahead windows; for rc == 0 case, the "lookup" will be done later.
645 if (it && it->it_op == IT_GETATTR && rc == 1) {
646 first = ll_statahead_enter(parent, &de, 0);
648 ll_statahead_exit(parent, de, 1);
649 else if (first == -EEXIST)
650 ll_statahead_mark(parent, de);
657 static void ll_pin(struct dentry *de, struct vfsmount *mnt, int flag)
659 struct inode *inode= de->d_inode;
660 struct ll_sb_info *sbi = ll_i2sbi(inode);
661 struct ll_dentry_data *ldd = ll_d2d(de);
662 struct obd_client_handle *handle;
669 /* Strictly speaking this introduces an additional race: the
670 * increments should wait until the rpc has returned.
671 * However, given that at present the function is void, this
673 if (flag == 1 && (++ldd->lld_mnt_count) > 1) {
679 if (flag == 0 && (++ldd->lld_cwd_count) > 1) {
686 handle = (flag) ? &ldd->lld_mnt_och : &ldd->lld_cwd_och;
687 oc = ll_mdscapa_get(inode);
688 rc = obd_pin(sbi->ll_md_exp, ll_inode2fid(inode), oc, handle, flag);
692 memset(handle, 0, sizeof(*handle));
694 ldd->lld_cwd_count--;
696 ldd->lld_mnt_count--;
704 static void ll_unpin(struct dentry *de, struct vfsmount *mnt, int flag)
706 struct ll_sb_info *sbi = ll_i2sbi(de->d_inode);
707 struct ll_dentry_data *ldd = ll_d2d(de);
708 struct obd_client_handle handle;
714 /* Strictly speaking this introduces an additional race: the
715 * increments should wait until the rpc has returned.
716 * However, given that at present the function is void, this
718 handle = (flag) ? ldd->lld_mnt_och : ldd->lld_cwd_och;
719 if (handle.och_magic != OBD_CLIENT_HANDLE_MAGIC) {
720 /* the "pin" failed */
727 count = --ldd->lld_mnt_count;
729 count = --ldd->lld_cwd_count;
737 rc = obd_unpin(sbi->ll_md_exp, &handle, flag);
743 #ifdef HAVE_VFS_INTENT_PATCHES
744 int ll_revalidate_nd(struct dentry *dentry, struct nameidata *nd)
749 if (nd && nd->flags & LOOKUP_LAST && !(nd->flags & LOOKUP_LINK_NOTLAST))
750 rc = ll_revalidate_it(dentry, nd->flags, &nd->intent);
752 rc = ll_revalidate_it(dentry, 0, NULL);
757 int ll_revalidate_nd(struct dentry *dentry, struct nameidata *nd)
762 if (nd && !(nd->flags & (LOOKUP_CONTINUE|LOOKUP_PARENT))) {
763 struct lookup_intent *it;
764 it = ll_convert_intent(&nd->intent.open, nd->flags);
767 if (it->it_op == (IT_OPEN|IT_CREAT))
768 if (nd->intent.open.flags & O_EXCL) {
769 CDEBUG(D_VFSTRACE, "create O_EXCL, returning 0\n");
774 rc = ll_revalidate_it(dentry, nd->flags, it);
776 if (rc && (nd->flags & LOOKUP_OPEN) &&
777 it_disposition(it, DISP_OPEN_OPEN)) {/*Open*/
778 #ifdef HAVE_FILE_IN_STRUCT_INTENT
779 // XXX Code duplication with ll_lookup_nd
780 if (S_ISFIFO(dentry->d_inode->i_mode)) {
781 // We cannot call open here as it would
784 (struct ptlrpc_request *)
785 it->d.lustre.it_data);
787 #if (LINUX_VERSION_CODE < KERNEL_VERSION(2,6,17))
788 /* 2.6.1[456] have a bug in open_namei() that forgets to check
789 * nd->intent.open.file for error, so we need to return it as lookup's result
793 nd->intent.open.file->private_data = it;
794 filp = lookup_instantiate_filp(nd, dentry,NULL);
799 nd->intent.open.file->private_data = it;
800 (void)lookup_instantiate_filp(nd, dentry,NULL);
804 ll_release_openhandle(dentry, it);
805 #endif /* HAVE_FILE_IN_STRUCT_INTENT */
807 if (!rc && (nd->flags & LOOKUP_CREATE) &&
808 it_disposition(it, DISP_OPEN_CREATE)) {
809 /* We created something but we may only return
810 * negative dentry here, so save request in dentry,
811 * if lookup will be called later on, it will
812 * pick the request, otherwise it would be freed
814 ll_d2d(dentry)->lld_it = it;
815 it = NULL; /* avoid freeing */
820 ll_intent_release(it);
821 OBD_FREE(it, sizeof(*it));
824 rc = ll_revalidate_it(dentry, 0, NULL);
831 void ll_d_iput(struct dentry *de, struct inode *inode)
834 if (!find_cbdata(inode))
839 struct dentry_operations ll_d_ops = {
840 .d_revalidate = ll_revalidate_nd,
841 .d_release = ll_release,
842 .d_delete = ll_ddelete,
844 .d_compare = ll_dcompare,