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 (c) 2002, 2010, Oracle and/or its affiliates. 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)
116 static inline int return_if_equal(struct ldlm_lock *lock, void *data)
118 if (lock->l_flags & LDLM_FL_CANCELING)
119 return LDLM_ITER_CONTINUE;
120 return LDLM_ITER_STOP;
123 /* find any ldlm lock of the inode in mdc and lov
127 static int find_cbdata(struct inode *inode)
129 struct ll_inode_info *lli = ll_i2info(inode);
130 struct ll_sb_info *sbi = ll_i2sbi(inode);
135 rc = md_find_cbdata(sbi->ll_md_exp, ll_inode2fid(inode),
136 return_if_equal, NULL);
141 rc = obd_find_cbdata(sbi->ll_dt_exp, lli->lli_smd,
142 return_if_equal, NULL);
147 /* should NOT be called with the dcache lock, see fs/dcache.c */
148 static int ll_ddelete(struct dentry *de)
153 CDEBUG(D_DENTRY, "%s dentry %.*s (%p, parent %p, inode %p) %s%s\n",
154 (de->d_flags & DCACHE_LUSTRE_INVALID ? "deleting" : "keeping"),
155 de->d_name.len, de->d_name.name, de, de->d_parent, de->d_inode,
156 d_unhashed(de) ? "" : "hashed,",
157 list_empty(&de->d_subdirs) ? "" : "subdirs");
159 /* if not ldlm lock for this inode, set i_nlink to 0 so that
160 * this inode can be recycled later b=20433 */
161 LASSERT(atomic_read(&de->d_count) == 0);
162 if (de->d_inode && !find_cbdata(de->d_inode))
163 de->d_inode->i_nlink = 0;
165 if (de->d_flags & DCACHE_LUSTRE_INVALID)
171 static int ll_set_dd(struct dentry *de)
176 CDEBUG(D_DENTRY, "ldd on dentry %.*s (%p) parent %p inode %p refc %d\n",
177 de->d_name.len, de->d_name.name, de, de->d_parent, de->d_inode,
178 atomic_read(&de->d_count));
180 if (de->d_fsdata == NULL) {
181 struct ll_dentry_data *lld;
184 if (likely(lld != NULL)) {
186 if (likely(de->d_fsdata == NULL))
199 int ll_dops_init(struct dentry *de, int block)
201 struct ll_dentry_data *lld = ll_d2d(de);
204 if (lld == NULL && block != 0) {
213 lld->lld_sa_generation = 0;
215 de->d_op = &ll_d_ops;
219 void ll_intent_drop_lock(struct lookup_intent *it)
221 struct lustre_handle *handle;
223 if (it->it_op && it->d.lustre.it_lock_mode) {
224 handle = (struct lustre_handle *)&it->d.lustre.it_lock_handle;
225 CDEBUG(D_DLMTRACE, "releasing lock with cookie "LPX64
226 " from it %p\n", handle->cookie, it);
227 ldlm_lock_decref(handle, it->d.lustre.it_lock_mode);
229 /* bug 494: intent_release may be called multiple times, from
230 * this thread and we don't want to double-decref this lock */
231 it->d.lustre.it_lock_mode = 0;
235 void ll_intent_release(struct lookup_intent *it)
239 CDEBUG(D_INFO, "intent %p released\n", it);
240 ll_intent_drop_lock(it);
241 #ifdef HAVE_VFS_INTENT_PATCHES
243 it->it_op_release = 0;
245 /* We are still holding extra reference on a request, need to free it */
246 if (it_disposition(it, DISP_ENQ_OPEN_REF))
247 ptlrpc_req_finished(it->d.lustre.it_data); /* ll_file_open */
248 if (it_disposition(it, DISP_ENQ_CREATE_REF)) /* create rec */
249 ptlrpc_req_finished(it->d.lustre.it_data);
250 if (it_disposition(it, DISP_ENQ_COMPLETE)) /* saved req from revalidate
252 ptlrpc_req_finished(it->d.lustre.it_data);
254 it->d.lustre.it_disposition = 0;
255 it->d.lustre.it_data = NULL;
259 /* Drop dentry if it is not used already, unhash otherwise.
260 Should be called with dcache lock held!
261 Returns: 1 if dentry was dropped, 0 if unhashed. */
262 int ll_drop_dentry(struct dentry *dentry)
265 if (atomic_read(&dentry->d_count) == 0) {
266 CDEBUG(D_DENTRY, "deleting dentry %.*s (%p) parent %p "
267 "inode %p\n", dentry->d_name.len,
268 dentry->d_name.name, dentry, dentry->d_parent,
272 unlock_dentry(dentry);
273 spin_unlock(&dcache_lock);
274 cfs_spin_unlock(&ll_lookup_lock);
276 cfs_spin_lock(&ll_lookup_lock);
277 spin_lock(&dcache_lock);
280 /* disconected dentry can not be find without lookup, because we
281 * not need his to unhash or mark invalid. */
282 if (dentry->d_flags & DCACHE_DISCONNECTED) {
283 unlock_dentry(dentry);
287 if (!(dentry->d_flags & DCACHE_LUSTRE_INVALID)) {
288 CDEBUG(D_DENTRY, "unhashing dentry %.*s (%p) parent %p "
289 "inode %p refc %d\n", dentry->d_name.len,
290 dentry->d_name.name, dentry, dentry->d_parent,
291 dentry->d_inode, atomic_read(&dentry->d_count));
292 /* actually we don't unhash the dentry, rather just
293 * mark it inaccessible for to __d_lookup(). otherwise
294 * sys_getcwd() could return -ENOENT -bzzz */
295 dentry->d_flags |= DCACHE_LUSTRE_INVALID;
296 if (!dentry->d_inode || !S_ISDIR(dentry->d_inode->i_mode))
299 unlock_dentry(dentry);
303 void ll_unhash_aliases(struct inode *inode)
305 struct list_head *tmp, *head;
309 CERROR("unexpected NULL inode, tell phil\n");
313 CDEBUG(D_INODE, "marking dentries for ino %lu/%u(%p) invalid\n",
314 inode->i_ino, inode->i_generation, inode);
316 head = &inode->i_dentry;
317 cfs_spin_lock(&ll_lookup_lock);
318 spin_lock(&dcache_lock);
321 while ((tmp = tmp->next) != head) {
322 struct dentry *dentry = list_entry(tmp, struct dentry, d_alias);
324 CDEBUG(D_DENTRY, "dentry in drop %.*s (%p) parent %p "
325 "inode %p flags %d\n", dentry->d_name.len,
326 dentry->d_name.name, dentry, dentry->d_parent,
327 dentry->d_inode, dentry->d_flags);
329 if (dentry->d_name.len == 1 && dentry->d_name.name[0] == '/') {
330 CERROR("called on root (?) dentry=%p, inode=%p "
331 "ino=%lu\n", dentry, inode, inode->i_ino);
332 lustre_dump_dentry(dentry, 1);
333 libcfs_debug_dumpstack(NULL);
336 if (ll_drop_dentry(dentry))
339 spin_unlock(&dcache_lock);
340 cfs_spin_unlock(&ll_lookup_lock);
345 int ll_revalidate_it_finish(struct ptlrpc_request *request,
346 struct lookup_intent *it,
355 if (it_disposition(it, DISP_LOOKUP_NEG))
358 rc = ll_prep_inode(&de->d_inode, request, NULL);
363 void ll_lookup_finish_locks(struct lookup_intent *it, struct dentry *dentry)
366 LASSERT(dentry != NULL);
368 if (it->d.lustre.it_lock_mode && dentry->d_inode != NULL) {
369 struct inode *inode = dentry->d_inode;
370 struct ll_sb_info *sbi = ll_i2sbi(dentry->d_inode);
372 CDEBUG(D_DLMTRACE, "setting l_data to inode %p (%lu/%u)\n",
373 inode, inode->i_ino, inode->i_generation);
374 md_set_lock_data(sbi->ll_md_exp, &it->d.lustre.it_lock_handle,
378 /* drop lookup or getattr locks immediately */
379 if (it->it_op == IT_LOOKUP || it->it_op == IT_GETATTR) {
380 /* on 2.6 there are situation when several lookups and
381 * revalidations may be requested during single operation.
382 * therefore, we don't release intent here -bzzz */
383 ll_intent_drop_lock(it);
387 void ll_frob_intent(struct lookup_intent **itp, struct lookup_intent *deft)
389 struct lookup_intent *it = *itp;
390 #ifdef HAVE_VFS_INTENT_PATCHES
392 LASSERTF(it->it_magic == INTENT_MAGIC,
393 "%p has bad intent magic: %x\n",
398 if (!it || it->it_op == IT_GETXATTR)
401 #ifdef HAVE_VFS_INTENT_PATCHES
402 it->it_op_release = ll_intent_release;
406 int ll_revalidate_it(struct dentry *de, int lookup_flags,
407 struct lookup_intent *it)
409 struct md_op_data *op_data;
410 struct ptlrpc_request *req = NULL;
411 struct lookup_intent lookup_it = { .it_op = IT_LOOKUP };
412 struct obd_export *exp;
413 struct inode *parent = de->d_parent->d_inode;
417 CDEBUG(D_VFSTRACE, "VFS Op:name=%s,intent=%s\n", de->d_name.name,
420 if (de->d_inode == NULL) {
421 /* We can only use negative dentries if this is stat or lookup,
422 for opens and stuff we do need to query server. */
423 /* If there is IT_CREAT in intent op set, then we must throw
424 away this negative dentry and actually do the request to
425 kernel to create whatever needs to be created (if possible)*/
426 if (it && (it->it_op & IT_CREAT))
429 if (de->d_flags & DCACHE_LUSTRE_INVALID)
432 rc = ll_have_md_lock(parent, MDS_INODELOCK_UPDATE, LCK_MINMODE);
436 /* Never execute intents for mount points.
437 * Attributes will be fixed up in ll_inode_revalidate_it */
438 if (d_mountpoint(de))
439 GOTO(out_sa, rc = 1);
441 /* need to get attributes in case root got changed from other client */
442 if (de == de->d_sb->s_root) {
443 rc = __ll_inode_revalidate_it(de, it, MDS_INODELOCK_LOOKUP);
449 exp = ll_i2mdexp(de->d_inode);
451 OBD_FAIL_TIMEOUT(OBD_FAIL_MDC_REVALIDATE_PAUSE, 5);
452 ll_frob_intent(&it, &lookup_it);
455 if (it->it_op == IT_LOOKUP && !(de->d_flags & DCACHE_LUSTRE_INVALID))
456 GOTO(out_sa, rc = 1);
458 op_data = ll_prep_md_op_data(NULL, parent, de->d_inode,
459 de->d_name.name, de->d_name.len,
460 0, LUSTRE_OPC_ANY, NULL);
462 RETURN(PTR_ERR(op_data));
464 if ((it->it_op == IT_OPEN) && de->d_inode) {
465 struct inode *inode = de->d_inode;
466 struct ll_inode_info *lli = ll_i2info(inode);
467 struct obd_client_handle **och_p;
471 * We used to check for MDS_INODELOCK_OPEN here, but in fact
472 * just having LOOKUP lock is enough to justify inode is the
473 * same. And if inode is the same and we have suitable
474 * openhandle, then there is no point in doing another OPEN RPC
475 * just to throw away newly received openhandle. There are no
476 * security implications too, if file owner or access mode is
477 * change, LOOKUP lock is revoked.
481 if (it->it_flags & FMODE_WRITE) {
482 och_p = &lli->lli_mds_write_och;
483 och_usecount = &lli->lli_open_fd_write_count;
484 } else if (it->it_flags & FMODE_EXEC) {
485 och_p = &lli->lli_mds_exec_och;
486 och_usecount = &lli->lli_open_fd_exec_count;
488 och_p = &lli->lli_mds_read_och;
489 och_usecount = &lli->lli_open_fd_read_count;
491 /* Check for the proper lock. */
492 if (!ll_have_md_lock(inode, MDS_INODELOCK_LOOKUP, LCK_MINMODE))
494 cfs_down(&lli->lli_och_sem);
495 if (*och_p) { /* Everything is open already, do nothing */
496 /*(*och_usecount)++; Do not let them steal our open
497 handle from under us */
498 /* XXX The code above was my original idea, but in case
499 we have the handle, but we cannot use it due to later
500 checks (e.g. O_CREAT|O_EXCL flags set), nobody
501 would decrement counter increased here. So we just
502 hope the lock won't be invalidated in between. But
503 if it would be, we'll reopen the open request to
504 MDS later during file open path */
505 cfs_up(&lli->lli_och_sem);
506 ll_finish_md_op_data(op_data);
509 cfs_up(&lli->lli_och_sem);
513 if (it->it_op == IT_GETATTR)
514 first = ll_statahead_enter(parent, &de, 0);
517 it->it_create_mode &= ~current->fs->umask;
518 it->it_create_mode |= M_CHECK_STALE;
519 rc = md_intent_lock(exp, op_data, NULL, 0, it,
521 &req, ll_md_blocking_ast, 0);
522 it->it_create_mode &= ~M_CHECK_STALE;
523 ll_finish_md_op_data(op_data);
524 if (it->it_op == IT_GETATTR && !first)
525 /* If there are too many locks on client-side, then some
526 * locks taken by statahead maybe dropped automatically
527 * before the real "revalidate" using them. */
528 ll_statahead_exit(parent, de, req == NULL ? rc : 0);
529 else if (first == -EEXIST)
530 ll_statahead_mark(parent, de);
532 /* If req is NULL, then md_intent_lock only tried to do a lock match;
533 * if all was well, it will return 1 if it found locks, 0 otherwise. */
534 if (req == NULL && rc >= 0) {
542 CDEBUG(D_INFO, "ll_intent_lock: rc %d : it->it_status "
543 "%d\n", rc, it->d.lustre.it_status);
549 rc = ll_revalidate_it_finish(req, it, de);
551 if (rc != -ESTALE && rc != -ENOENT)
552 ll_intent_release(it);
556 if ((it->it_op & IT_OPEN) && de->d_inode &&
557 !S_ISREG(de->d_inode->i_mode) &&
558 !S_ISDIR(de->d_inode->i_mode)) {
559 ll_release_openhandle(de, it);
563 /* unfortunately ll_intent_lock may cause a callback and revoke our
565 cfs_spin_lock(&ll_lookup_lock);
566 spin_lock(&dcache_lock);
570 d_rehash_cond(de, 0);
571 spin_unlock(&dcache_lock);
572 cfs_spin_unlock(&ll_lookup_lock);
575 /* We do not free request as it may be reused during following lookup
576 * (see comment in mdc/mdc_locks.c::mdc_intent_lock()), request will
577 * be freed in ll_lookup_it or in ll_intent_release. But if
578 * request was not completed, we need to free it. (bug 5154, 9903) */
579 if (req != NULL && !it_disposition(it, DISP_ENQ_COMPLETE))
580 ptlrpc_req_finished(req);
582 ll_unhash_aliases(de->d_inode);
583 /* done in ll_unhash_aliases()
584 dentry->d_flags |= DCACHE_LUSTRE_INVALID; */
586 CDEBUG(D_DENTRY, "revalidated dentry %.*s (%p) parent %p "
587 "inode %p refc %d\n", de->d_name.len,
588 de->d_name.name, de, de->d_parent, de->d_inode,
589 atomic_read(&de->d_count));
590 if (de->d_flags & DCACHE_LUSTRE_INVALID) {
592 de->d_flags &= ~DCACHE_LUSTRE_INVALID;
595 ll_lookup_finish_locks(it, de);
600 * This part is here to combat evil-evil race in real_lookup on 2.6
601 * kernels. The race details are: We enter do_lookup() looking for some
602 * name, there is nothing in dcache for this name yet and d_lookup()
603 * returns NULL. We proceed to real_lookup(), and while we do this,
604 * another process does open on the same file we looking up (most simple
605 * reproducer), open succeeds and the dentry is added. Now back to
606 * us. In real_lookup() we do d_lookup() again and suddenly find the
607 * dentry, so we call d_revalidate on it, but there is no lock, so
608 * without this code we would return 0, but unpatched real_lookup just
609 * returns -ENOENT in such a case instead of retrying the lookup. Once
610 * this is dealt with in real_lookup(), all of this ugly mess can go and
611 * we can just check locks in ->d_revalidate without doing any RPCs
615 if (it != &lookup_it) {
616 /* MDS_INODELOCK_UPDATE needed for IT_GETATTR case. */
617 if (it->it_op == IT_GETATTR)
618 lookup_it.it_op = IT_GETATTR;
619 ll_lookup_finish_locks(it, de);
623 /* Do real lookup here. */
624 op_data = ll_prep_md_op_data(NULL, parent, NULL, de->d_name.name,
625 de->d_name.len, 0, (it->it_op & IT_CREAT ?
627 LUSTRE_OPC_ANY), NULL);
629 RETURN(PTR_ERR(op_data));
631 rc = md_intent_lock(exp, op_data, NULL, 0, it, 0, &req,
632 ll_md_blocking_ast, 0);
634 struct mdt_body *mdt_body;
635 struct lu_fid fid = {.f_seq = 0, .f_oid = 0, .f_ver = 0};
636 mdt_body = req_capsule_server_get(&req->rq_pill, &RMF_MDT_BODY);
639 fid = *ll_inode2fid(de->d_inode);
641 /* see if we got same inode, if not - return error */
642 if (lu_fid_eq(&fid, &mdt_body->fid1)) {
643 ll_finish_md_op_data(op_data);
645 goto revalidate_finish;
647 ll_intent_release(it);
649 ll_finish_md_op_data(op_data);
654 * For rc == 1 case, should not return directly to prevent losing
655 * statahead windows; for rc == 0 case, the "lookup" will be done later.
657 if (it && it->it_op == IT_GETATTR && rc == 1) {
658 first = ll_statahead_enter(parent, &de, 0);
660 ll_statahead_exit(parent, de, 1);
661 else if (first == -EEXIST)
662 ll_statahead_mark(parent, de);
669 static void ll_pin(struct dentry *de, struct vfsmount *mnt, int flag)
671 struct inode *inode= de->d_inode;
672 struct ll_sb_info *sbi = ll_i2sbi(inode);
673 struct ll_dentry_data *ldd = ll_d2d(de);
674 struct obd_client_handle *handle;
681 /* Strictly speaking this introduces an additional race: the
682 * increments should wait until the rpc has returned.
683 * However, given that at present the function is void, this
685 if (flag == 1 && (++ldd->lld_mnt_count) > 1) {
691 if (flag == 0 && (++ldd->lld_cwd_count) > 1) {
698 handle = (flag) ? &ldd->lld_mnt_och : &ldd->lld_cwd_och;
699 oc = ll_mdscapa_get(inode);
700 rc = obd_pin(sbi->ll_md_exp, ll_inode2fid(inode), oc, handle, flag);
704 memset(handle, 0, sizeof(*handle));
706 ldd->lld_cwd_count--;
708 ldd->lld_mnt_count--;
716 static void ll_unpin(struct dentry *de, struct vfsmount *mnt, int flag)
718 struct ll_sb_info *sbi = ll_i2sbi(de->d_inode);
719 struct ll_dentry_data *ldd = ll_d2d(de);
720 struct obd_client_handle handle;
726 /* Strictly speaking this introduces an additional race: the
727 * increments should wait until the rpc has returned.
728 * However, given that at present the function is void, this
730 handle = (flag) ? ldd->lld_mnt_och : ldd->lld_cwd_och;
731 if (handle.och_magic != OBD_CLIENT_HANDLE_MAGIC) {
732 /* the "pin" failed */
739 count = --ldd->lld_mnt_count;
741 count = --ldd->lld_cwd_count;
749 rc = obd_unpin(sbi->ll_md_exp, &handle, flag);
755 #ifdef HAVE_VFS_INTENT_PATCHES
756 int ll_revalidate_nd(struct dentry *dentry, struct nameidata *nd)
761 if (nd && nd->flags & LOOKUP_LAST && !(nd->flags & LOOKUP_LINK_NOTLAST))
762 rc = ll_revalidate_it(dentry, nd->flags, &nd->intent);
764 rc = ll_revalidate_it(dentry, 0, NULL);
769 int ll_revalidate_nd(struct dentry *dentry, struct nameidata *nd)
774 if (nd && !(nd->flags & (LOOKUP_CONTINUE|LOOKUP_PARENT))) {
775 struct lookup_intent *it;
777 it = ll_convert_intent(&nd->intent.open, nd->flags);
781 if (it->it_op == (IT_OPEN|IT_CREAT) &&
782 nd->intent.open.flags & O_EXCL) {
783 CDEBUG(D_VFSTRACE, "create O_EXCL, returning 0\n");
788 rc = ll_revalidate_it(dentry, nd->flags, it);
790 if (rc && (nd->flags & LOOKUP_OPEN) &&
791 it_disposition(it, DISP_OPEN_OPEN)) {/*Open*/
792 #ifdef HAVE_FILE_IN_STRUCT_INTENT
793 // XXX Code duplication with ll_lookup_nd
794 if (S_ISFIFO(dentry->d_inode->i_mode)) {
795 // We cannot call open here as it would
798 (struct ptlrpc_request *)
799 it->d.lustre.it_data);
801 #if (LINUX_VERSION_CODE < KERNEL_VERSION(2,6,17))
802 /* 2.6.1[456] have a bug in open_namei() that forgets to check
803 * nd->intent.open.file for error, so we need to return it as lookup's result
807 nd->intent.open.file->private_data = it;
808 filp = lookup_instantiate_filp(nd, dentry,NULL);
813 nd->intent.open.file->private_data = it;
814 (void)lookup_instantiate_filp(nd, dentry,NULL);
818 ll_release_openhandle(dentry, it);
819 #endif /* HAVE_FILE_IN_STRUCT_INTENT */
821 if (!rc && (nd->flags & LOOKUP_CREATE) &&
822 it_disposition(it, DISP_OPEN_CREATE)) {
823 /* We created something but we may only return
824 * negative dentry here, so save request in dentry,
825 * if lookup will be called later on, it will
826 * pick the request, otherwise it would be freed
828 ll_d2d(dentry)->lld_it = it;
829 it = NULL; /* avoid freeing */
834 ll_intent_release(it);
835 OBD_FREE(it, sizeof(*it));
838 rc = ll_revalidate_it(dentry, 0, NULL);
845 void ll_d_iput(struct dentry *de, struct inode *inode)
848 if (!find_cbdata(inode))
853 struct dentry_operations ll_d_ops = {
854 .d_revalidate = ll_revalidate_nd,
855 .d_release = ll_release,
856 .d_delete = ll_ddelete,
858 .d_compare = ll_dcompare,