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[fs/lustre-release.git] / lustre / llite / namei.c
1 /*
2  * GPL HEADER START
3  *
4  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
5  *
6  * This program is free software; you can redistribute it and/or modify
7  * it under the terms of the GNU General Public License version 2 only,
8  * as published by the Free Software Foundation.
9  *
10  * This program is distributed in the hope that it will be useful, but
11  * WITHOUT ANY WARRANTY; without even the implied warranty of
12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
13  * General Public License version 2 for more details (a copy is included
14  * in the LICENSE file that accompanied this code).
15  *
16  * You should have received a copy of the GNU General Public License
17  * version 2 along with this program; If not, see
18  * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
19  *
20  * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
21  * CA 95054 USA or visit www.sun.com if you need additional information or
22  * have any questions.
23  *
24  * GPL HEADER END
25  */
26 /*
27  * Copyright (c) 2002, 2010, Oracle and/or its affiliates. All rights reserved.
28  * Use is subject to license terms.
29  *
30  * Copyright (c) 2011, 2013, Intel Corporation.
31  */
32 /*
33  * This file is part of Lustre, http://www.lustre.org/
34  * Lustre is a trademark of Sun Microsystems, Inc.
35  */
36
37 #include <linux/fs.h>
38 #include <linux/sched.h>
39 #include <linux/mm.h>
40 #include <linux/quotaops.h>
41 #include <linux/highmem.h>
42 #include <linux/pagemap.h>
43 #include <linux/security.h>
44
45 #define DEBUG_SUBSYSTEM S_LLITE
46
47 #include <obd_support.h>
48 #include <lustre_fid.h>
49 #include <lustre_lite.h>
50 #include <lustre_dlm.h>
51 #include <lustre_ver.h>
52 #include "llite_internal.h"
53
54 static int ll_create_it(struct inode *, struct dentry *,
55                         int, struct lookup_intent *);
56
57 /*
58  * Check if we have something mounted at the named dchild.
59  * In such a case there would always be dentry present.
60  */
61 static int ll_d_mountpoint(struct dentry *dparent, struct dentry *dchild,
62                            struct qstr *name)
63 {
64         int mounted = 0;
65
66         if (unlikely(dchild)) {
67                 mounted = d_mountpoint(dchild);
68         } else if (dparent) {
69                 dchild = d_lookup(dparent, name);
70                 if (dchild) {
71                         mounted = d_mountpoint(dchild);
72                         dput(dchild);
73                 }
74         }
75         return mounted;
76 }
77
78 /* called from iget5_locked->find_inode() under inode_lock spinlock */
79 static int ll_test_inode(struct inode *inode, void *opaque)
80 {
81         struct ll_inode_info    *lli = ll_i2info(inode);
82         struct lustre_md        *md = opaque;
83
84         if (unlikely(!(md->body->mbo_valid & OBD_MD_FLID))) {
85                 CERROR("MDS body missing FID\n");
86                 return 0;
87         }
88
89         if (!lu_fid_eq(&lli->lli_fid, &md->body->mbo_fid1))
90                 return 0;
91
92         return 1;
93 }
94
95 static int ll_set_inode(struct inode *inode, void *opaque)
96 {
97         struct ll_inode_info *lli = ll_i2info(inode);
98         struct mdt_body *body = ((struct lustre_md *)opaque)->body;
99
100         if (unlikely(!(body->mbo_valid & OBD_MD_FLID))) {
101                 CERROR("MDS body missing FID\n");
102                 return -EINVAL;
103         }
104
105         lli->lli_fid = body->mbo_fid1;
106         if (unlikely(!(body->mbo_valid & OBD_MD_FLTYPE))) {
107                 CERROR("Can not initialize inode "DFID" without object type: "
108                        "valid = "LPX64"\n",
109                        PFID(&lli->lli_fid), body->mbo_valid);
110                 return -EINVAL;
111         }
112
113         inode->i_mode = (inode->i_mode & ~S_IFMT) | (body->mbo_mode & S_IFMT);
114         if (unlikely(inode->i_mode == 0)) {
115                 CERROR("Invalid inode "DFID" type\n", PFID(&lli->lli_fid));
116                 return -EINVAL;
117         }
118
119         ll_lli_init(lli);
120
121         return 0;
122 }
123
124
125 /**
126  * Get an inode by inode number(@hash), which is already instantiated by
127  * the intent lookup).
128  */
129 struct inode *ll_iget(struct super_block *sb, ino_t hash,
130                       struct lustre_md *md)
131 {
132         struct inode    *inode;
133         int             rc = 0;
134
135         ENTRY;
136
137         LASSERT(hash != 0);
138         inode = iget5_locked(sb, hash, ll_test_inode, ll_set_inode, md);
139         if (inode == NULL)
140                 RETURN(ERR_PTR(-ENOMEM));
141
142         if (inode->i_state & I_NEW) {
143                 rc = ll_read_inode2(inode, md);
144                 if (rc == 0 && S_ISREG(inode->i_mode) &&
145                     ll_i2info(inode)->lli_clob == NULL) {
146                         CDEBUG(D_INODE, "%s: apply lsm %p to inode "DFID"\n",
147                                 ll_get_fsname(sb, NULL, 0), md->lsm,
148                                 PFID(ll_inode2fid(inode)));
149                         rc = cl_file_inode_init(inode, md);
150                 }
151                 if (rc != 0) {
152                         make_bad_inode(inode);
153                         unlock_new_inode(inode);
154                         iput(inode);
155                         inode = ERR_PTR(rc);
156                 } else {
157                         unlock_new_inode(inode);
158                 }
159         } else if (!(inode->i_state & (I_FREEING | I_CLEAR))) {
160                 rc = ll_update_inode(inode, md);
161                 CDEBUG(D_VFSTRACE, "got inode: "DFID"(%p): rc = %d\n",
162                        PFID(&md->body->mbo_fid1), inode, rc);
163                 if (rc != 0) {
164                         make_bad_inode(inode);
165                         iput(inode);
166                         inode = ERR_PTR(rc);
167                 }
168         }
169
170         RETURN(inode);
171 }
172
173 static void ll_invalidate_negative_children(struct inode *dir)
174 {
175         struct dentry *dentry, *tmp_subdir;
176         DECLARE_LL_D_HLIST_NODE_PTR(p);
177
178         ll_lock_dcache(dir);
179         ll_d_hlist_for_each_entry(dentry, p, &dir->i_dentry, d_alias) {
180                 spin_lock(&dentry->d_lock);
181                 if (!list_empty(&dentry->d_subdirs)) {
182                         struct dentry *child;
183
184                         list_for_each_entry_safe(child, tmp_subdir,
185                                                  &dentry->d_subdirs,
186                                                  d_u.d_child) {
187                                 if (child->d_inode == NULL)
188                                         d_lustre_invalidate(child, 1);
189                         }
190                 }
191                 spin_unlock(&dentry->d_lock);
192         }
193         ll_unlock_dcache(dir);
194 }
195
196 int ll_test_inode_by_fid(struct inode *inode, void *opaque)
197 {
198         return lu_fid_eq(&ll_i2info(inode)->lli_fid, opaque);
199 }
200
201 int ll_md_blocking_ast(struct ldlm_lock *lock, struct ldlm_lock_desc *desc,
202                        void *data, int flag)
203 {
204         struct lustre_handle lockh;
205         int rc;
206         ENTRY;
207
208         switch (flag) {
209         case LDLM_CB_BLOCKING:
210                 ldlm_lock2handle(lock, &lockh);
211                 rc = ldlm_cli_cancel(&lockh, LCF_ASYNC);
212                 if (rc < 0) {
213                         CDEBUG(D_INODE, "ldlm_cli_cancel: rc = %d\n", rc);
214                         RETURN(rc);
215                 }
216                 break;
217         case LDLM_CB_CANCELING: {
218                 struct inode *inode = ll_inode_from_resource_lock(lock);
219                 __u64 bits = lock->l_policy_data.l_inodebits.bits;
220
221                 /* Inode is set to lock->l_resource->lr_lvb_inode
222                  * for mdc - bug 24555 */
223                 LASSERT(lock->l_ast_data == NULL);
224
225                 if (inode == NULL)
226                         break;
227
228                 /* Invalidate all dentries associated with this inode */
229                 LASSERT(ldlm_is_canceling(lock));
230
231                 if (!fid_res_name_eq(ll_inode2fid(inode),
232                                      &lock->l_resource->lr_name)) {
233                         LDLM_ERROR(lock, "data mismatch with object "DFID"(%p)",
234                                    PFID(ll_inode2fid(inode)), inode);
235                         LBUG();
236                 }
237
238                 if (bits & MDS_INODELOCK_XATTR) {
239                         ll_xattr_cache_destroy(inode);
240                         bits &= ~MDS_INODELOCK_XATTR;
241                 }
242
243                 /* For OPEN locks we differentiate between lock modes
244                  * LCK_CR, LCK_CW, LCK_PR - bug 22891 */
245                 if (bits & MDS_INODELOCK_OPEN)
246                         ll_have_md_lock(inode, &bits, lock->l_req_mode);
247
248                 if (bits & MDS_INODELOCK_OPEN) {
249                         fmode_t fmode;
250
251                         switch (lock->l_req_mode) {
252                         case LCK_CW:
253                                 fmode = FMODE_WRITE;
254                                 break;
255                         case LCK_PR:
256                                 fmode = FMODE_EXEC;
257                                 break;
258                         case LCK_CR:
259                                 fmode = FMODE_READ;
260                                 break;
261                         default:
262                                 LDLM_ERROR(lock, "bad lock mode for OPEN lock");
263                                 LBUG();
264                         }
265
266                         ll_md_real_close(inode, fmode);
267
268                         bits &= ~MDS_INODELOCK_OPEN;
269                 }
270
271                 if (bits & (MDS_INODELOCK_LOOKUP | MDS_INODELOCK_UPDATE |
272                             MDS_INODELOCK_LAYOUT | MDS_INODELOCK_PERM))
273                         ll_have_md_lock(inode, &bits, LCK_MINMODE);
274
275                 if (bits & MDS_INODELOCK_LAYOUT) {
276                         struct cl_object_conf conf = {
277                                 .coc_opc = OBJECT_CONF_INVALIDATE,
278                                 .coc_inode = inode,
279                         };
280
281                         rc = ll_layout_conf(inode, &conf);
282                         if (rc < 0)
283                                 CDEBUG(D_INODE, "cannot invalidate layout of "
284                                        DFID": rc = %d\n",
285                                        PFID(ll_inode2fid(inode)), rc);
286                 }
287
288                 if (bits & MDS_INODELOCK_UPDATE) {
289                         struct ll_inode_info *lli = ll_i2info(inode);
290
291                         spin_lock(&lli->lli_lock);
292                         lli->lli_flags &= ~LLIF_MDS_SIZE_LOCK;
293                         spin_unlock(&lli->lli_lock);
294                 }
295
296                 if ((bits & MDS_INODELOCK_UPDATE) && S_ISDIR(inode->i_mode)) {
297                         struct ll_inode_info *lli = ll_i2info(inode);
298
299                         CDEBUG(D_INODE, "invalidating inode "DFID" lli = %p, "
300                                "pfid  = "DFID"\n", PFID(ll_inode2fid(inode)),
301                                lli, PFID(&lli->lli_pfid));
302                         truncate_inode_pages(inode->i_mapping, 0);
303
304                         if (unlikely(!fid_is_zero(&lli->lli_pfid))) {
305                                 struct inode *master_inode = NULL;
306                                 unsigned long hash;
307
308                                 /* This is slave inode, since all of the child
309                                  * dentry is connected on the master inode, so
310                                  * we have to invalidate the negative children
311                                  * on master inode */
312                                 CDEBUG(D_INODE, "Invalidate s"DFID" m"DFID"\n",
313                                        PFID(ll_inode2fid(inode)),
314                                        PFID(&lli->lli_pfid));
315
316                                 hash = cl_fid_build_ino(&lli->lli_pfid,
317                                         ll_need_32bit_api(ll_i2sbi(inode)));
318
319                                 master_inode = ilookup5(inode->i_sb, hash,
320                                                         ll_test_inode_by_fid,
321                                                         (void *)&lli->lli_pfid);
322                                 if (master_inode != NULL &&
323                                         !IS_ERR(master_inode)) {
324                                         ll_invalidate_negative_children(
325                                                                 master_inode);
326                                         iput(master_inode);
327                                 }
328                         } else {
329                                 ll_invalidate_negative_children(inode);
330                         }
331                 }
332
333                 if ((bits & (MDS_INODELOCK_LOOKUP | MDS_INODELOCK_PERM)) &&
334                     inode->i_sb->s_root != NULL &&
335                     inode != inode->i_sb->s_root->d_inode)
336                         ll_invalidate_aliases(inode);
337
338                 iput(inode);
339                 break;
340         }
341         default:
342                 LBUG();
343         }
344
345         RETURN(0);
346 }
347
348 __u32 ll_i2suppgid(struct inode *i)
349 {
350         if (in_group_p(i->i_gid))
351                 return (__u32)from_kgid(&init_user_ns, i->i_gid);
352         else
353                 return (__u32) __kgid_val(INVALID_GID);
354 }
355
356 /* Pack the required supplementary groups into the supplied groups array.
357  * If we don't need to use the groups from the target inode(s) then we
358  * instead pack one or more groups from the user's supplementary group
359  * array in case it might be useful.  Not needed if doing an MDS-side upcall. */
360 void ll_i2gids(__u32 *suppgids, struct inode *i1, struct inode *i2)
361 {
362         LASSERT(i1 != NULL);
363         LASSERT(suppgids != NULL);
364
365         suppgids[0] = ll_i2suppgid(i1);
366
367         if (i2)
368                 suppgids[1] = ll_i2suppgid(i2);
369         else
370                 suppgids[1] = -1;
371 }
372
373 /*
374  * try to reuse three types of dentry:
375  * 1. unhashed alias, this one is unhashed by d_invalidate (but it may be valid
376  *    by concurrent .revalidate).
377  * 2. INVALID alias (common case for no valid ldlm lock held, but this flag may
378  *    be cleared by others calling d_lustre_revalidate).
379  * 3. DISCONNECTED alias.
380  */
381 static struct dentry *ll_find_alias(struct inode *inode, struct dentry *dentry)
382 {
383         struct dentry *alias, *discon_alias, *invalid_alias;
384         DECLARE_LL_D_HLIST_NODE_PTR(p);
385
386         if (ll_d_hlist_empty(&inode->i_dentry))
387                 return NULL;
388
389         discon_alias = invalid_alias = NULL;
390
391         ll_lock_dcache(inode);
392         ll_d_hlist_for_each_entry(alias, p, &inode->i_dentry, d_alias) {
393                 LASSERT(alias != dentry);
394
395                 spin_lock(&alias->d_lock);
396                 if (alias->d_flags & DCACHE_DISCONNECTED)
397                         /* LASSERT(last_discon == NULL); LU-405, bz 20055 */
398                         discon_alias = alias;
399                 else if (alias->d_parent == dentry->d_parent             &&
400                          alias->d_name.hash == dentry->d_name.hash       &&
401                          alias->d_name.len == dentry->d_name.len         &&
402                          memcmp(alias->d_name.name, dentry->d_name.name,
403                                 dentry->d_name.len) == 0)
404                         invalid_alias = alias;
405                 spin_unlock(&alias->d_lock);
406
407                 if (invalid_alias)
408                         break;
409         }
410         alias = invalid_alias ?: discon_alias ?: NULL;
411         if (alias) {
412                 spin_lock(&alias->d_lock);
413                 dget_dlock(alias);
414                 spin_unlock(&alias->d_lock);
415         }
416         ll_unlock_dcache(inode);
417
418         return alias;
419 }
420
421 /*
422  * Similar to d_splice_alias(), but lustre treats invalid alias
423  * similar to DCACHE_DISCONNECTED, and tries to use it anyway.
424  */
425 struct dentry *ll_splice_alias(struct inode *inode, struct dentry *de)
426 {
427         struct dentry *new;
428         int rc;
429
430         if (inode) {
431                 new = ll_find_alias(inode, de);
432                 if (new) {
433                         rc = ll_d_init(new);
434                         if (rc < 0) {
435                                 dput(new);
436                                 return ERR_PTR(rc);
437                         }
438                         d_move(new, de);
439                         iput(inode);
440                         CDEBUG(D_DENTRY,
441                                "Reuse dentry %p inode %p refc %d flags %#x\n",
442                               new, new->d_inode, ll_d_count(new), new->d_flags);
443                         return new;
444                 }
445         }
446         rc = ll_d_init(de);
447         if (rc < 0)
448                 return ERR_PTR(rc);
449         d_add(de, inode);
450         CDEBUG(D_DENTRY, "Add dentry %p inode %p refc %d flags %#x\n",
451                de, de->d_inode, ll_d_count(de), de->d_flags);
452         return de;
453 }
454
455 static int ll_lookup_it_finish(struct ptlrpc_request *request,
456                                struct lookup_intent *it,
457                                struct inode *parent, struct dentry **de)
458 {
459         struct inode             *inode = NULL;
460         __u64                     bits = 0;
461         int                       rc;
462         ENTRY;
463
464         /* NB 1 request reference will be taken away by ll_intent_lock()
465          * when I return */
466         CDEBUG(D_DENTRY, "it %p it_disposition %x\n", it,
467                it->d.lustre.it_disposition);
468         if (!it_disposition(it, DISP_LOOKUP_NEG)) {
469                 rc = ll_prep_inode(&inode, request, (*de)->d_sb, it);
470                 if (rc)
471                         RETURN(rc);
472
473                 ll_set_lock_data(ll_i2sbi(parent)->ll_md_exp, inode, it, &bits);
474
475                 /* We used to query real size from OSTs here, but actually
476                    this is not needed. For stat() calls size would be updated
477                    from subsequent do_revalidate()->ll_inode_revalidate_it() in
478                    2.4 and
479                    vfs_getattr_it->ll_getattr()->ll_inode_revalidate_it() in 2.6
480                    Everybody else who needs correct file size would call
481                    ll_glimpse_size or some equivalent themselves anyway.
482                    Also see bug 7198. */
483         }
484
485         /* Only hash *de if it is unhashed (new dentry).
486          * Atoimc_open may passin hashed dentries for open.
487          */
488         if (d_unhashed(*de)) {
489                 struct dentry *alias;
490
491                 alias = ll_splice_alias(inode, *de);
492                 if (IS_ERR(alias))
493                         RETURN(PTR_ERR(alias));
494                 *de = alias;
495         } else if (!it_disposition(it, DISP_LOOKUP_NEG)  &&
496                    !it_disposition(it, DISP_OPEN_CREATE)) {
497                 /* With DISP_OPEN_CREATE dentry will
498                    instantiated in ll_create_it. */
499                 LASSERT((*de)->d_inode == NULL);
500                 d_instantiate(*de, inode);
501         }
502
503         if (!it_disposition(it, DISP_LOOKUP_NEG)) {
504                 /* we have lookup look - unhide dentry */
505                 if (bits & MDS_INODELOCK_LOOKUP)
506                         d_lustre_revalidate(*de);
507         } else if (!it_disposition(it, DISP_OPEN_CREATE)) {
508                 /* If file created on server, don't depend on parent UPDATE
509                  * lock to unhide it. It is left hidden and next lookup can
510                  * find it in ll_splice_alias.
511                  */
512                 /* Check that parent has UPDATE lock. */
513                 struct lookup_intent parent_it = {
514                                         .it_op = IT_GETATTR,
515                                         .d.lustre.it_lock_handle = 0 };
516                 struct lu_fid   fid = ll_i2info(parent)->lli_fid;
517
518                 /* If it is striped directory, get the real stripe parent */
519                 if (unlikely(ll_i2info(parent)->lli_lsm_md != NULL)) {
520                         rc = md_get_fid_from_lsm(ll_i2mdexp(parent),
521                                                  ll_i2info(parent)->lli_lsm_md,
522                                                  (*de)->d_name.name,
523                                                  (*de)->d_name.len, &fid);
524                         if (rc != 0)
525                                 RETURN(rc);
526                 }
527
528                 if (md_revalidate_lock(ll_i2mdexp(parent), &parent_it, &fid,
529                                        NULL)) {
530                         d_lustre_revalidate(*de);
531                         ll_intent_release(&parent_it);
532                 }
533         }
534
535         RETURN(0);
536 }
537
538 static struct dentry *ll_lookup_it(struct inode *parent, struct dentry *dentry,
539                                    struct lookup_intent *it, int lookup_flags)
540 {
541         struct lookup_intent lookup_it = { .it_op = IT_LOOKUP };
542         struct dentry *save = dentry, *retval;
543         struct ptlrpc_request *req = NULL;
544         struct md_op_data *op_data;
545         __u32 opc;
546         int rc;
547         ENTRY;
548
549         if (dentry->d_name.len > ll_i2sbi(parent)->ll_namelen)
550                 RETURN(ERR_PTR(-ENAMETOOLONG));
551
552         CDEBUG(D_VFSTRACE, "VFS Op:name=%.*s, dir="DFID"(%p), intent=%s\n",
553                dentry->d_name.len, dentry->d_name.name,
554                PFID(ll_inode2fid(parent)), parent, LL_IT2STR(it));
555
556         if (d_mountpoint(dentry))
557                 CERROR("Tell Peter, lookup on mtpt, it %s\n", LL_IT2STR(it));
558
559         if (it == NULL || it->it_op == IT_GETXATTR)
560                 it = &lookup_it;
561
562         if (it->it_op == IT_GETATTR) {
563                 rc = ll_statahead_enter(parent, &dentry, 0);
564                 if (rc == 1) {
565                         if (dentry == save)
566                                 GOTO(out, retval = NULL);
567                         GOTO(out, retval = dentry);
568                 }
569         }
570
571         if (it->it_op & IT_CREAT)
572                 opc = LUSTRE_OPC_CREATE;
573         else
574                 opc = LUSTRE_OPC_ANY;
575
576         op_data = ll_prep_md_op_data(NULL, parent, NULL, dentry->d_name.name,
577                                      dentry->d_name.len, lookup_flags, opc,
578                                      NULL);
579         if (IS_ERR(op_data))
580                 RETURN((void *)op_data);
581
582         /* enforce umask if acl disabled or MDS doesn't support umask */
583         if (!IS_POSIXACL(parent) || !exp_connect_umask(ll_i2mdexp(parent)))
584                 it->it_create_mode &= ~current_umask();
585
586         rc = md_intent_lock(ll_i2mdexp(parent), op_data, it, &req,
587                             &ll_md_blocking_ast, 0);
588         ll_finish_md_op_data(op_data);
589         if (rc < 0)
590                 GOTO(out, retval = ERR_PTR(rc));
591
592         rc = ll_lookup_it_finish(req, it, parent, &dentry);
593         if (rc != 0) {
594                 ll_intent_release(it);
595                 GOTO(out, retval = ERR_PTR(rc));
596         }
597
598         if ((it->it_op & IT_OPEN) && dentry->d_inode &&
599             !S_ISREG(dentry->d_inode->i_mode) &&
600             !S_ISDIR(dentry->d_inode->i_mode)) {
601                 ll_release_openhandle(dentry, it);
602         }
603         ll_lookup_finish_locks(it, dentry);
604
605         if (dentry == save)
606                 GOTO(out, retval = NULL);
607         else
608                 GOTO(out, retval = dentry);
609  out:
610         if (req)
611                 ptlrpc_req_finished(req);
612         if (it->it_op == IT_GETATTR && (retval == NULL || retval == dentry))
613                 ll_statahead_mark(parent, dentry);
614         return retval;
615 }
616
617 #ifdef HAVE_IOP_ATOMIC_OPEN
618 static struct dentry *ll_lookup_nd(struct inode *parent, struct dentry *dentry,
619                                    unsigned int flags)
620 {
621         struct lookup_intent *itp, it = { .it_op = IT_GETATTR };
622         struct dentry *de;
623
624         CDEBUG(D_VFSTRACE, "VFS Op:name=%.*s, dir="DFID"(%p), flags=%u\n",
625                dentry->d_name.len, dentry->d_name.name,
626                PFID(ll_inode2fid(parent)), parent, flags);
627
628         /* Optimize away (CREATE && !OPEN). Let .create handle the race. */
629         if ((flags & LOOKUP_CREATE) && !(flags & LOOKUP_OPEN))
630                 return NULL;
631
632         if (flags & (LOOKUP_PARENT|LOOKUP_OPEN|LOOKUP_CREATE))
633                 itp = NULL;
634         else
635                 itp = &it;
636         de = ll_lookup_it(parent, dentry, itp, 0);
637
638         if (itp != NULL)
639                 ll_intent_release(itp);
640
641         return de;
642 }
643
644 /*
645  * For cached negative dentry and new dentry, handle lookup/create/open
646  * together.
647  */
648 static int ll_atomic_open(struct inode *dir, struct dentry *dentry,
649                           struct file *file, unsigned open_flags,
650                           umode_t mode, int *opened)
651 {
652         struct lookup_intent *it;
653         struct dentry *de;
654         long long lookup_flags = LOOKUP_OPEN;
655         int rc = 0;
656         ENTRY;
657
658         CDEBUG(D_VFSTRACE, "VFS Op:name=%.*s, dir="DFID"(%p), file %p,"
659                            "open_flags %x, mode %x opened %d\n",
660                dentry->d_name.len, dentry->d_name.name,
661                PFID(ll_inode2fid(dir)), dir, file, open_flags, mode, *opened);
662
663         OBD_ALLOC(it, sizeof(*it));
664         if (!it)
665                 RETURN(-ENOMEM);
666
667         it->it_op = IT_OPEN;
668         if (open_flags & O_CREAT) {
669                 it->it_op |= IT_CREAT;
670                 lookup_flags |= LOOKUP_CREATE;
671         }
672         it->it_create_mode = (mode & S_IALLUGO) | S_IFREG;
673         it->it_flags = (open_flags & ~O_ACCMODE) | OPEN_FMODE(open_flags);
674         it->it_flags &= ~MDS_OPEN_FL_INTERNAL;
675
676         /* Dentry added to dcache tree in ll_lookup_it */
677         de = ll_lookup_it(dir, dentry, it, lookup_flags);
678         if (IS_ERR(de))
679                 rc = PTR_ERR(de);
680         else if (de != NULL)
681                 dentry = de;
682
683         if (!rc) {
684                 if (it_disposition(it, DISP_OPEN_CREATE)) {
685                         /* Dentry instantiated in ll_create_it. */
686                         rc = ll_create_it(dir, dentry, mode, it);
687                         if (rc) {
688                                 /* We dget in ll_splice_alias. */
689                                 if (de != NULL)
690                                         dput(de);
691                                 goto out_release;
692                         }
693
694                         *opened |= FILE_CREATED;
695                 }
696                 if (dentry->d_inode && it_disposition(it, DISP_OPEN_OPEN)) {
697                         /* Open dentry. */
698                         if (S_ISFIFO(dentry->d_inode->i_mode)) {
699                                 /* We cannot call open here as it would
700                                  * deadlock.
701                                  */
702                                 if (it_disposition(it, DISP_ENQ_OPEN_REF))
703                                         ptlrpc_req_finished(
704                                                        (struct ptlrpc_request *)
705                                                           it->d.lustre.it_data);
706                                 rc = finish_no_open(file, de);
707                         } else {
708                                 file->private_data = it;
709                                 rc = finish_open(file, dentry, NULL, opened);
710                                 /* We dget in ll_splice_alias. finish_open takes
711                                  * care of dget for fd open.
712                                  */
713                                 if (de != NULL)
714                                         dput(de);
715                         }
716                 } else {
717                         rc = finish_no_open(file, de);
718                 }
719         }
720
721 out_release:
722         ll_intent_release(it);
723         OBD_FREE(it, sizeof(*it));
724
725         RETURN(rc);
726 }
727
728 #else /* !HAVE_IOP_ATOMIC_OPEN */
729 static struct lookup_intent *
730 ll_convert_intent(struct open_intent *oit, int lookup_flags)
731 {
732         struct lookup_intent *it;
733
734         OBD_ALLOC_PTR(it);
735         if (!it)
736                 return ERR_PTR(-ENOMEM);
737
738         if (lookup_flags & LOOKUP_OPEN) {
739                 it->it_op = IT_OPEN;
740                 if (lookup_flags & LOOKUP_CREATE)
741                         it->it_op |= IT_CREAT;
742                 it->it_create_mode = (oit->create_mode & S_IALLUGO) | S_IFREG;
743                 it->it_flags = ll_namei_to_lookup_intent_flag(oit->flags);
744                 it->it_flags &= ~MDS_OPEN_FL_INTERNAL;
745         } else {
746                 it->it_op = IT_GETATTR;
747         }
748
749         return it;
750 }
751
752 static struct dentry *ll_lookup_nd(struct inode *parent, struct dentry *dentry,
753                                    struct nameidata *nd)
754 {
755         struct dentry *de;
756         ENTRY;
757
758         if (nd && !(nd->flags & (LOOKUP_CONTINUE|LOOKUP_PARENT))) {
759                 struct lookup_intent *it;
760
761                 if (ll_d2d(dentry) && ll_d2d(dentry)->lld_it) {
762                         it = ll_d2d(dentry)->lld_it;
763                         ll_d2d(dentry)->lld_it = NULL;
764                 } else {
765                         if ((nd->flags & LOOKUP_CREATE) &&
766                             !(nd->flags & LOOKUP_OPEN))
767                                 RETURN(NULL);
768
769                         it = ll_convert_intent(&nd->intent.open, nd->flags);
770                         if (IS_ERR(it))
771                                 RETURN((struct dentry *)it);
772                 }
773
774                 de = ll_lookup_it(parent, dentry, it, nd->flags);
775                 if (de)
776                         dentry = de;
777                 if ((nd->flags & LOOKUP_OPEN) && !IS_ERR(dentry)) { /* Open */
778                         if (dentry->d_inode &&
779                             it_disposition(it, DISP_OPEN_OPEN)) { /* nocreate */
780                                 if (S_ISFIFO(dentry->d_inode->i_mode)) {
781                                         // We cannot call open here as it would
782                                         // deadlock.
783                                         ptlrpc_req_finished(
784                                                        (struct ptlrpc_request *)
785                                                           it->d.lustre.it_data);
786                                 } else {
787                                         struct file *filp;
788
789                                         nd->intent.open.file->private_data = it;
790                                         filp = lookup_instantiate_filp(nd,
791                                                                        dentry,
792                                                                        NULL);
793                                         if (IS_ERR(filp)) {
794                                                 if (de)
795                                                         dput(de);
796                                                 de = (struct dentry *)filp;
797                                         }
798                                 }
799                         } else if (it_disposition(it, DISP_OPEN_CREATE)) {
800                                 // XXX This can only reliably work on assumption
801                                 // that there are NO hashed negative dentries.
802                                 ll_d2d(dentry)->lld_it = it;
803                                 it = NULL; /* Will be freed in ll_create_nd */
804                                 /* We absolutely depend on ll_create_nd to be
805                                  * called to not leak this intent and possible
806                                  * data attached to it */
807                         }
808                 }
809
810                 if (it) {
811                         ll_intent_release(it);
812                         OBD_FREE(it, sizeof(*it));
813                 }
814         } else {
815                 de = ll_lookup_it(parent, dentry, NULL, 0);
816         }
817
818         RETURN(de);
819 }
820 #endif /* HAVE_IOP_ATOMIC_OPEN */
821
822 /* We depend on "mode" being set with the proper file type/umask by now */
823 static struct inode *ll_create_node(struct inode *dir, struct lookup_intent *it)
824 {
825         struct inode *inode = NULL;
826         struct ptlrpc_request *request = NULL;
827         struct ll_sb_info *sbi = ll_i2sbi(dir);
828         int rc;
829         ENTRY;
830
831         LASSERT(it && it->d.lustre.it_disposition);
832
833         LASSERT(it_disposition(it, DISP_ENQ_CREATE_REF));
834         request = it->d.lustre.it_data;
835         it_clear_disposition(it, DISP_ENQ_CREATE_REF);
836         rc = ll_prep_inode(&inode, request, dir->i_sb, it);
837         if (rc)
838                 GOTO(out, inode = ERR_PTR(rc));
839
840         LASSERT(ll_d_hlist_empty(&inode->i_dentry));
841
842         /* We asked for a lock on the directory, but were granted a
843          * lock on the inode.  Since we finally have an inode pointer,
844          * stuff it in the lock. */
845         CDEBUG(D_DLMTRACE, "setting l_ast_data to inode "DFID"(%p)\n",
846                PFID(ll_inode2fid(inode)), inode);
847         ll_set_lock_data(sbi->ll_md_exp, inode, it, NULL);
848         EXIT;
849  out:
850         ptlrpc_req_finished(request);
851         return inode;
852 }
853
854 /*
855  * By the time this is called, we already have created the directory cache
856  * entry for the new file, but it is so far negative - it has no inode.
857  *
858  * We defer creating the OBD object(s) until open, to keep the intent and
859  * non-intent code paths similar, and also because we do not have the MDS
860  * inode number before calling ll_create_node() (which is needed for LOV),
861  * so we would need to do yet another RPC to the MDS to store the LOV EA
862  * data on the MDS.  If needed, we would pass the PACKED lmm as data and
863  * lmm_size in datalen (the MDS still has code which will handle that).
864  *
865  * If the create succeeds, we fill in the inode information
866  * with d_instantiate().
867  */
868 static int ll_create_it(struct inode *dir, struct dentry *dentry, int mode,
869                         struct lookup_intent *it)
870 {
871         struct inode *inode;
872         int rc = 0;
873         ENTRY;
874
875         CDEBUG(D_VFSTRACE, "VFS Op:name=%.*s, dir="DFID"(%p), intent=%s\n",
876                dentry->d_name.len, dentry->d_name.name,
877                PFID(ll_inode2fid(dir)), dir, LL_IT2STR(it));
878
879         rc = it_open_error(DISP_OPEN_CREATE, it);
880         if (rc)
881                 RETURN(rc);
882
883         inode = ll_create_node(dir, it);
884         if (IS_ERR(inode))
885                 RETURN(PTR_ERR(inode));
886
887         d_instantiate(dentry, inode);
888         RETURN(0);
889 }
890
891 void ll_update_times(struct ptlrpc_request *request, struct inode *inode)
892 {
893         struct mdt_body *body = req_capsule_server_get(&request->rq_pill,
894                                                        &RMF_MDT_BODY);
895
896         LASSERT(body);
897         if (body->mbo_valid & OBD_MD_FLMTIME &&
898             body->mbo_mtime > LTIME_S(inode->i_mtime)) {
899                 CDEBUG(D_INODE, "setting fid "DFID" mtime from %lu to "LPU64
900                        "\n", PFID(ll_inode2fid(inode)),
901                        LTIME_S(inode->i_mtime), body->mbo_mtime);
902                 LTIME_S(inode->i_mtime) = body->mbo_mtime;
903         }
904
905         if (body->mbo_valid & OBD_MD_FLCTIME &&
906             body->mbo_ctime > LTIME_S(inode->i_ctime))
907                 LTIME_S(inode->i_ctime) = body->mbo_ctime;
908 }
909
910 static int ll_new_node(struct inode *dir, struct qstr *name,
911                        const char *tgt, int mode, int rdev,
912                        struct dentry *dchild, __u32 opc)
913 {
914         struct ptlrpc_request *request = NULL;
915         struct md_op_data *op_data;
916         struct inode *inode = NULL;
917         struct ll_sb_info *sbi = ll_i2sbi(dir);
918         int tgt_len = 0;
919         int err;
920
921         ENTRY;
922         if (unlikely(tgt != NULL))
923                 tgt_len = strlen(tgt) + 1;
924
925         op_data = ll_prep_md_op_data(NULL, dir, NULL, name->name,
926                                      name->len, 0, opc, NULL);
927         if (IS_ERR(op_data))
928                 GOTO(err_exit, err = PTR_ERR(op_data));
929
930         err = md_create(sbi->ll_md_exp, op_data, tgt, tgt_len, mode,
931                         from_kuid(&init_user_ns, current_fsuid()),
932                         from_kgid(&init_user_ns, current_fsgid()),
933                         cfs_curproc_cap_pack(), rdev, &request);
934         ll_finish_md_op_data(op_data);
935         if (err)
936                 GOTO(err_exit, err);
937
938         ll_update_times(request, dir);
939
940         if (dchild) {
941                 err = ll_prep_inode(&inode, request, dchild->d_sb, NULL);
942                 if (err)
943                      GOTO(err_exit, err);
944
945                 d_instantiate(dchild, inode);
946         }
947         EXIT;
948 err_exit:
949         ptlrpc_req_finished(request);
950
951         return err;
952 }
953
954 static int ll_mknod_generic(struct inode *dir, struct qstr *name, int mode,
955                             unsigned rdev, struct dentry *dchild)
956 {
957         int err;
958         ENTRY;
959
960         CDEBUG(D_VFSTRACE, "VFS Op:name=%.*s, dir="DFID"(%p) mode %o dev %x\n",
961                name->len, name->name, PFID(ll_inode2fid(dir)), dir,
962                mode, rdev);
963
964         if (!IS_POSIXACL(dir) || !exp_connect_umask(ll_i2mdexp(dir)))
965                 mode &= ~current_umask();
966
967         switch (mode & S_IFMT) {
968         case 0:
969                 mode |= S_IFREG; /* for mode = 0 case, fallthrough */
970         case S_IFREG:
971         case S_IFCHR:
972         case S_IFBLK:
973         case S_IFIFO:
974         case S_IFSOCK:
975                 err = ll_new_node(dir, name, NULL, mode, rdev, dchild,
976                                   LUSTRE_OPC_MKNOD);
977                 break;
978         case S_IFDIR:
979                 err = -EPERM;
980                 break;
981         default:
982                 err = -EINVAL;
983         }
984
985         if (!err)
986                 ll_stats_ops_tally(ll_i2sbi(dir), LPROC_LL_MKNOD, 1);
987
988         RETURN(err);
989 }
990
991 #ifdef HAVE_IOP_ATOMIC_OPEN
992 /*
993  * Plain create. Intent create is handled in atomic_open.
994  */
995 static int ll_create_nd(struct inode *dir, struct dentry *dentry,
996                         umode_t mode, bool want_excl)
997 {
998         int rc;
999
1000         CDEBUG(D_VFSTRACE, "VFS Op:name=%.*s, dir="DFID"(%p), "
1001                            "flags=%u, excl=%d\n", dentry->d_name.len,
1002                dentry->d_name.name, PFID(ll_inode2fid(dir)),
1003                dir, mode, want_excl);
1004
1005         rc = ll_mknod_generic(dir, &dentry->d_name, mode, 0, dentry);
1006
1007         ll_stats_ops_tally(ll_i2sbi(dir), LPROC_LL_CREATE, 1);
1008
1009         CDEBUG(D_VFSTRACE, "VFS Op:name=%.*s, unhashed %d\n",
1010                dentry->d_name.len, dentry->d_name.name, d_unhashed(dentry));
1011
1012         return rc;
1013 }
1014 #else /* !HAVE_IOP_ATOMIC_OPEN */
1015 static int ll_create_nd(struct inode *dir, struct dentry *dentry,
1016                         ll_umode_t mode, struct nameidata *nd)
1017 {
1018         struct ll_dentry_data *lld = ll_d2d(dentry);
1019         struct lookup_intent *it = NULL;
1020         int rc;
1021
1022         if (lld != NULL)
1023                 it = lld->lld_it;
1024
1025         if (!it)
1026                 return ll_mknod_generic(dir, &dentry->d_name, mode, 0, dentry);
1027
1028         lld->lld_it = NULL;
1029
1030         /* Was there an error? Propagate it! */
1031         if (it->d.lustre.it_status) {
1032                 rc = it->d.lustre.it_status;
1033                 goto out;
1034         }
1035
1036         rc = ll_create_it(dir, dentry, mode, it);
1037         if (nd && (nd->flags & LOOKUP_OPEN) && dentry->d_inode) { /* Open */
1038                 struct file *filp;
1039
1040                 nd->intent.open.file->private_data = it;
1041                 filp = lookup_instantiate_filp(nd, dentry, NULL);
1042                 if (IS_ERR(filp))
1043                         rc = PTR_ERR(filp);
1044         }
1045
1046 out:
1047         ll_intent_release(it);
1048         OBD_FREE(it, sizeof(*it));
1049
1050         if (!rc)
1051                 ll_stats_ops_tally(ll_i2sbi(dir), LPROC_LL_CREATE, 1);
1052
1053         return rc;
1054 }
1055 #endif /* HAVE_IOP_ATOMIC_OPEN */
1056
1057 static int ll_symlink_generic(struct inode *dir, struct qstr *name,
1058                               const char *tgt, struct dentry *dchild)
1059 {
1060         int err;
1061         ENTRY;
1062
1063         CDEBUG(D_VFSTRACE, "VFS Op:name=%.*s, dir="DFID"(%p), target=%.*s\n",
1064                name->len, name->name, PFID(ll_inode2fid(dir)),
1065                dir, 3000, tgt);
1066
1067         err = ll_new_node(dir, name, (char *)tgt, S_IFLNK | S_IRWXUGO,
1068                           0, dchild, LUSTRE_OPC_SYMLINK);
1069
1070         if (!err)
1071                 ll_stats_ops_tally(ll_i2sbi(dir), LPROC_LL_SYMLINK, 1);
1072
1073         RETURN(err);
1074 }
1075
1076 static int ll_link_generic(struct inode *src,  struct inode *dir,
1077                            struct qstr *name, struct dentry *dchild)
1078 {
1079         struct ll_sb_info *sbi = ll_i2sbi(dir);
1080         struct ptlrpc_request *request = NULL;
1081         struct md_op_data *op_data;
1082         int err;
1083
1084         ENTRY;
1085         CDEBUG(D_VFSTRACE, "VFS Op: inode="DFID"(%p), dir="DFID
1086                "(%p), target=%.*s\n", PFID(ll_inode2fid(src)), src,
1087                PFID(ll_inode2fid(dir)), dir, name->len, name->name);
1088
1089         op_data = ll_prep_md_op_data(NULL, src, dir, name->name, name->len,
1090                                      0, LUSTRE_OPC_ANY, NULL);
1091         if (IS_ERR(op_data))
1092                 RETURN(PTR_ERR(op_data));
1093
1094         err = md_link(sbi->ll_md_exp, op_data, &request);
1095         ll_finish_md_op_data(op_data);
1096         if (err)
1097                 GOTO(out, err);
1098
1099         ll_update_times(request, dir);
1100         ll_stats_ops_tally(sbi, LPROC_LL_LINK, 1);
1101         EXIT;
1102 out:
1103         ptlrpc_req_finished(request);
1104         RETURN(err);
1105 }
1106
1107 static int ll_mkdir_generic(struct inode *dir, struct qstr *name,
1108                             int mode, struct dentry *dchild)
1109
1110 {
1111         int err;
1112         ENTRY;
1113
1114         CDEBUG(D_VFSTRACE, "VFS Op:name=%.*s, dir="DFID"(%p)\n",
1115                name->len, name->name, PFID(ll_inode2fid(dir)), dir);
1116
1117         if (!IS_POSIXACL(dir) || !exp_connect_umask(ll_i2mdexp(dir)))
1118                 mode &= ~current_umask();
1119         mode = (mode & (S_IRWXUGO|S_ISVTX)) | S_IFDIR;
1120         err = ll_new_node(dir, name, NULL, mode, 0, dchild, LUSTRE_OPC_MKDIR);
1121
1122         if (!err)
1123                 ll_stats_ops_tally(ll_i2sbi(dir), LPROC_LL_MKDIR, 1);
1124
1125         RETURN(err);
1126 }
1127
1128 static int ll_rmdir_generic(struct inode *dir, struct dentry *dparent,
1129                             struct dentry *dchild, struct qstr *name)
1130 {
1131         struct ptlrpc_request *request = NULL;
1132         struct md_op_data *op_data;
1133         int rc;
1134         ENTRY;
1135
1136         CDEBUG(D_VFSTRACE, "VFS Op:name=%.*s, dir="DFID"(%p)\n",
1137                name->len, name->name, PFID(ll_inode2fid(dir)), dir);
1138
1139         if (unlikely(ll_d_mountpoint(dparent, dchild, name)))
1140                 RETURN(-EBUSY);
1141
1142         op_data = ll_prep_md_op_data(NULL, dir, NULL, name->name, name->len,
1143                                      S_IFDIR, LUSTRE_OPC_ANY, NULL);
1144         if (IS_ERR(op_data))
1145                 RETURN(PTR_ERR(op_data));
1146
1147         if (dchild != NULL && dchild->d_inode != NULL)
1148                 op_data->op_fid3 = *ll_inode2fid(dchild->d_inode);
1149         op_data->op_fid2 = op_data->op_fid3;
1150         rc = md_unlink(ll_i2sbi(dir)->ll_md_exp, op_data, &request);
1151         ll_finish_md_op_data(op_data);
1152         if (rc == 0) {
1153                 ll_update_times(request, dir);
1154                 ll_stats_ops_tally(ll_i2sbi(dir), LPROC_LL_RMDIR, 1);
1155         }
1156
1157         ptlrpc_req_finished(request);
1158         RETURN(rc);
1159 }
1160
1161 /**
1162  * Remove dir entry
1163  **/
1164 int ll_rmdir_entry(struct inode *dir, char *name, int namelen)
1165 {
1166         struct ptlrpc_request *request = NULL;
1167         struct md_op_data *op_data;
1168         int rc;
1169         ENTRY;
1170
1171         CDEBUG(D_VFSTRACE, "VFS Op:name=%.*s, dir="DFID"(%p)\n",
1172                namelen, name, PFID(ll_inode2fid(dir)), dir);
1173
1174         op_data = ll_prep_md_op_data(NULL, dir, NULL, name, strlen(name),
1175                                      S_IFDIR, LUSTRE_OPC_ANY, NULL);
1176         if (IS_ERR(op_data))
1177                 RETURN(PTR_ERR(op_data));
1178         op_data->op_cli_flags |= CLI_RM_ENTRY;
1179         rc = md_unlink(ll_i2sbi(dir)->ll_md_exp, op_data, &request);
1180         ll_finish_md_op_data(op_data);
1181         if (rc == 0) {
1182                 ll_update_times(request, dir);
1183                 ll_stats_ops_tally(ll_i2sbi(dir), LPROC_LL_RMDIR, 1);
1184         }
1185
1186         ptlrpc_req_finished(request);
1187         RETURN(rc);
1188 }
1189
1190 int ll_objects_destroy(struct ptlrpc_request *request, struct inode *dir)
1191 {
1192         struct mdt_body *body;
1193         struct lov_mds_md *eadata;
1194         struct lov_stripe_md *lsm = NULL;
1195         struct obd_trans_info oti = { 0 };
1196         struct obdo *oa;
1197         struct obd_capa *oc = NULL;
1198         int rc;
1199         ENTRY;
1200
1201         /* req is swabbed so this is safe */
1202         body = req_capsule_server_get(&request->rq_pill, &RMF_MDT_BODY);
1203         if (!(body->mbo_valid & OBD_MD_FLEASIZE))
1204                 RETURN(0);
1205
1206         if (body->mbo_eadatasize == 0) {
1207                 CERROR("OBD_MD_FLEASIZE set but eadatasize zero\n");
1208                 GOTO(out, rc = -EPROTO);
1209         }
1210
1211         /* The MDS sent back the EA because we unlinked the last reference
1212          * to this file. Use this EA to unlink the objects on the OST.
1213          * It's opaque so we don't swab here; we leave it to obd_unpackmd() to
1214          * check it is complete and sensible. */
1215         eadata = req_capsule_server_sized_get(&request->rq_pill, &RMF_MDT_MD,
1216                                               body->mbo_eadatasize);
1217         LASSERT(eadata != NULL);
1218
1219         rc = obd_unpackmd(ll_i2dtexp(dir), &lsm, eadata, body->mbo_eadatasize);
1220         if (rc < 0) {
1221                 CERROR("obd_unpackmd: %d\n", rc);
1222                 GOTO(out, rc);
1223         }
1224         LASSERT(rc >= sizeof(*lsm));
1225
1226         OBDO_ALLOC(oa);
1227         if (oa == NULL)
1228                 GOTO(out_free_memmd, rc = -ENOMEM);
1229
1230         oa->o_oi = lsm->lsm_oi;
1231         oa->o_mode = body->mbo_mode & S_IFMT;
1232         oa->o_valid = OBD_MD_FLID | OBD_MD_FLTYPE | OBD_MD_FLGROUP;
1233
1234         if (body->mbo_valid & OBD_MD_FLCOOKIE) {
1235                 oa->o_valid |= OBD_MD_FLCOOKIE;
1236                 oti.oti_logcookies =
1237                         req_capsule_server_sized_get(&request->rq_pill,
1238                                                      &RMF_LOGCOOKIES,
1239                                                    sizeof(struct llog_cookie) *
1240                                                      lsm->lsm_stripe_count);
1241                 if (oti.oti_logcookies == NULL) {
1242                         oa->o_valid &= ~OBD_MD_FLCOOKIE;
1243                         body->mbo_valid &= ~OBD_MD_FLCOOKIE;
1244                 }
1245         }
1246
1247         if (body->mbo_valid & OBD_MD_FLOSSCAPA) {
1248                 rc = md_unpack_capa(ll_i2mdexp(dir), request, &RMF_CAPA2, &oc);
1249                 if (rc)
1250                         GOTO(out_free_memmd, rc);
1251         }
1252
1253         rc = obd_destroy(NULL, ll_i2dtexp(dir), oa, lsm, &oti,
1254                          ll_i2mdexp(dir), oc);
1255         capa_put(oc);
1256         if (rc)
1257                 CERROR("obd destroy objid "DOSTID" error %d\n",
1258                        POSTID(&lsm->lsm_oi), rc);
1259 out_free_memmd:
1260         obd_free_memmd(ll_i2dtexp(dir), &lsm);
1261         OBDO_FREE(oa);
1262 out:
1263         return rc;
1264 }
1265
1266 /* ll_unlink_generic() doesn't update the inode with the new link count.
1267  * Instead, ll_ddelete() and ll_d_iput() will update it based upon if there
1268  * is any lock existing. They will recycle dentries and inodes based upon locks
1269  * too. b=20433 */
1270 static int ll_unlink_generic(struct inode *dir, struct dentry *dparent,
1271                              struct dentry *dchild, struct qstr *name)
1272 {
1273         struct ptlrpc_request *request = NULL;
1274         struct md_op_data *op_data;
1275         int rc;
1276         ENTRY;
1277         CDEBUG(D_VFSTRACE, "VFS Op:name=%.*s, dir="DFID"(%p)\n",
1278                name->len, name->name, PFID(ll_inode2fid(dir)), dir);
1279
1280         /*
1281          * XXX: unlink bind mountpoint maybe call to here,
1282          * just check it as vfs_unlink does.
1283          */
1284         if (unlikely(ll_d_mountpoint(dparent, dchild, name)))
1285                 RETURN(-EBUSY);
1286
1287         op_data = ll_prep_md_op_data(NULL, dir, NULL, name->name,
1288                                      name->len, 0, LUSTRE_OPC_ANY, NULL);
1289         if (IS_ERR(op_data))
1290                 RETURN(PTR_ERR(op_data));
1291
1292         if (dchild != NULL && dchild->d_inode != NULL)
1293                 op_data->op_fid3 = *ll_inode2fid(dchild->d_inode);
1294
1295         op_data->op_fid2 = op_data->op_fid3;
1296         rc = md_unlink(ll_i2sbi(dir)->ll_md_exp, op_data, &request);
1297         ll_finish_md_op_data(op_data);
1298         if (rc)
1299                 GOTO(out, rc);
1300
1301         ll_update_times(request, dir);
1302         ll_stats_ops_tally(ll_i2sbi(dir), LPROC_LL_UNLINK, 1);
1303
1304         rc = ll_objects_destroy(request, dir);
1305  out:
1306         ptlrpc_req_finished(request);
1307         RETURN(rc);
1308 }
1309
1310 static int ll_rename_generic(struct inode *src, struct dentry *src_dparent,
1311                              struct dentry *src_dchild, struct qstr *src_name,
1312                              struct inode *tgt, struct dentry *tgt_dparent,
1313                              struct dentry *tgt_dchild, struct qstr *tgt_name)
1314 {
1315         struct ptlrpc_request *request = NULL;
1316         struct ll_sb_info *sbi = ll_i2sbi(src);
1317         struct md_op_data *op_data;
1318         int err;
1319         ENTRY;
1320         CDEBUG(D_VFSTRACE, "VFS Op:oldname=%.*s, src_dir="DFID
1321                "(%p), newname=%.*s, tgt_dir="DFID"(%p)\n",
1322                src_name->len, src_name->name,
1323                PFID(ll_inode2fid(src)), src, tgt_name->len,
1324                tgt_name->name, PFID(ll_inode2fid(tgt)), tgt);
1325
1326         if (unlikely(ll_d_mountpoint(src_dparent, src_dchild, src_name) ||
1327             ll_d_mountpoint(tgt_dparent, tgt_dchild, tgt_name)))
1328                 RETURN(-EBUSY);
1329
1330         op_data = ll_prep_md_op_data(NULL, src, tgt, NULL, 0, 0,
1331                                      LUSTRE_OPC_ANY, NULL);
1332         if (IS_ERR(op_data))
1333                 RETURN(PTR_ERR(op_data));
1334
1335         if (src_dchild != NULL && src_dchild->d_inode != NULL)
1336                 op_data->op_fid3 = *ll_inode2fid(src_dchild->d_inode);
1337         if (tgt_dchild != NULL && tgt_dchild->d_inode != NULL)
1338                 op_data->op_fid4 = *ll_inode2fid(tgt_dchild->d_inode);
1339
1340         err = md_rename(sbi->ll_md_exp, op_data,
1341                         src_name->name, src_name->len,
1342                         tgt_name->name, tgt_name->len, &request);
1343         ll_finish_md_op_data(op_data);
1344         if (!err) {
1345                 ll_update_times(request, src);
1346                 ll_update_times(request, tgt);
1347                 ll_stats_ops_tally(sbi, LPROC_LL_RENAME, 1);
1348                 err = ll_objects_destroy(request, src);
1349         }
1350
1351         ptlrpc_req_finished(request);
1352
1353         RETURN(err);
1354 }
1355
1356 static int ll_mknod(struct inode *dir, struct dentry *dchild, ll_umode_t mode,
1357                     dev_t rdev)
1358 {
1359         return ll_mknod_generic(dir, &dchild->d_name, mode,
1360                                 old_encode_dev(rdev), dchild);
1361 }
1362
1363 static int ll_unlink(struct inode * dir, struct dentry *dentry)
1364 {
1365         return ll_unlink_generic(dir, NULL, dentry, &dentry->d_name);
1366 }
1367
1368 static int ll_mkdir(struct inode *dir, struct dentry *dentry, ll_umode_t mode)
1369 {
1370         return ll_mkdir_generic(dir, &dentry->d_name, mode, dentry);
1371 }
1372
1373 static int ll_rmdir(struct inode *dir, struct dentry *dentry)
1374 {
1375         return ll_rmdir_generic(dir, NULL, dentry, &dentry->d_name);
1376 }
1377
1378 static int ll_symlink(struct inode *dir, struct dentry *dentry,
1379                       const char *oldname)
1380 {
1381         return ll_symlink_generic(dir, &dentry->d_name, oldname, dentry);
1382 }
1383
1384 static int ll_link(struct dentry *old_dentry, struct inode *dir,
1385                    struct dentry *new_dentry)
1386 {
1387         return ll_link_generic(old_dentry->d_inode, dir, &new_dentry->d_name,
1388                                new_dentry);
1389 }
1390
1391 static int ll_rename(struct inode *old_dir, struct dentry *old_dentry,
1392                      struct inode *new_dir, struct dentry *new_dentry)
1393 {
1394         int err;
1395         err = ll_rename_generic(old_dir, NULL,
1396                                  old_dentry, &old_dentry->d_name,
1397                                  new_dir, NULL, new_dentry,
1398                                  &new_dentry->d_name);
1399         if (!err)
1400                         d_move(old_dentry, new_dentry);
1401         return err;
1402 }
1403
1404 const struct inode_operations ll_dir_inode_operations = {
1405         .mknod              = ll_mknod,
1406 #ifdef HAVE_IOP_ATOMIC_OPEN
1407         .atomic_open        = ll_atomic_open,
1408 #endif
1409         .lookup             = ll_lookup_nd,
1410         .create             = ll_create_nd,
1411         /* We need all these non-raw things for NFSD, to not patch it. */
1412         .unlink             = ll_unlink,
1413         .mkdir              = ll_mkdir,
1414         .rmdir              = ll_rmdir,
1415         .symlink            = ll_symlink,
1416         .link               = ll_link,
1417         .rename             = ll_rename,
1418         .setattr            = ll_setattr,
1419         .getattr            = ll_getattr,
1420         .permission         = ll_inode_permission,
1421         .setxattr           = ll_setxattr,
1422         .getxattr           = ll_getxattr,
1423         .listxattr          = ll_listxattr,
1424         .removexattr        = ll_removexattr,
1425 #ifdef HAVE_IOP_GET_ACL
1426         .get_acl            = ll_get_acl,
1427 #endif
1428 };
1429
1430 const struct inode_operations ll_special_inode_operations = {
1431         .setattr        = ll_setattr,
1432         .getattr        = ll_getattr,
1433         .permission     = ll_inode_permission,
1434         .setxattr       = ll_setxattr,
1435         .getxattr       = ll_getxattr,
1436         .listxattr      = ll_listxattr,
1437         .removexattr    = ll_removexattr,
1438 #ifdef HAVE_IOP_GET_ACL
1439         .get_acl            = ll_get_acl,
1440 #endif
1441 };