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LU-12355 llite: MS_* flags and SB_* flags split
[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.gnu.org/licenses/gpl-2.0.html
19  *
20  * GPL HEADER END
21  */
22 /*
23  * Copyright (c) 2002, 2010, Oracle and/or its affiliates. All rights reserved.
24  * Use is subject to license terms.
25  *
26  * Copyright (c) 2011, 2017, Intel Corporation.
27  */
28 /*
29  * This file is part of Lustre, http://www.lustre.org/
30  * Lustre is a trademark of Sun Microsystems, Inc.
31  */
32
33 #include <linux/fs.h>
34 #include <linux/sched.h>
35 #include <linux/mm.h>
36 #include <linux/quotaops.h>
37 #include <linux/highmem.h>
38 #include <linux/pagemap.h>
39 #include <linux/security.h>
40 #include <linux/user_namespace.h>
41 #ifdef HAVE_UIDGID_HEADER
42 # include <linux/uidgid.h>
43 #endif
44
45 #define DEBUG_SUBSYSTEM S_LLITE
46
47 #include <obd_support.h>
48 #include <lustre_fid.h>
49 #include <lustre_dlm.h>
50 #include "llite_internal.h"
51
52 static int ll_create_it(struct inode *dir, struct dentry *dentry,
53                         struct lookup_intent *it,
54                         void *secctx, __u32 secctxlen);
55
56 /* called from iget5_locked->find_inode() under inode_lock spinlock */
57 static int ll_test_inode(struct inode *inode, void *opaque)
58 {
59         struct ll_inode_info    *lli = ll_i2info(inode);
60         struct lustre_md        *md = opaque;
61
62         if (unlikely(!(md->body->mbo_valid & OBD_MD_FLID))) {
63                 CERROR("MDS body missing FID\n");
64                 return 0;
65         }
66
67         if (!lu_fid_eq(&lli->lli_fid, &md->body->mbo_fid1))
68                 return 0;
69
70         return 1;
71 }
72
73 static int ll_set_inode(struct inode *inode, void *opaque)
74 {
75         struct ll_inode_info *lli = ll_i2info(inode);
76         struct mdt_body *body = ((struct lustre_md *)opaque)->body;
77
78         if (unlikely(!(body->mbo_valid & OBD_MD_FLID))) {
79                 CERROR("MDS body missing FID\n");
80                 return -EINVAL;
81         }
82
83         lli->lli_fid = body->mbo_fid1;
84         if (unlikely(!(body->mbo_valid & OBD_MD_FLTYPE))) {
85                 CERROR("Can not initialize inode "DFID" without object type: "
86                        "valid = %#llx\n",
87                        PFID(&lli->lli_fid), body->mbo_valid);
88                 return -EINVAL;
89         }
90
91         inode->i_mode = (inode->i_mode & ~S_IFMT) | (body->mbo_mode & S_IFMT);
92         if (unlikely(inode->i_mode == 0)) {
93                 CERROR("Invalid inode "DFID" type\n", PFID(&lli->lli_fid));
94                 return -EINVAL;
95         }
96
97         ll_lli_init(lli);
98
99         return 0;
100 }
101
102
103 /**
104  * Get an inode by inode number(@hash), which is already instantiated by
105  * the intent lookup).
106  */
107 struct inode *ll_iget(struct super_block *sb, ino_t hash,
108                       struct lustre_md *md)
109 {
110         struct inode    *inode;
111         int             rc = 0;
112
113         ENTRY;
114
115         LASSERT(hash != 0);
116         inode = iget5_locked(sb, hash, ll_test_inode, ll_set_inode, md);
117         if (inode == NULL)
118                 RETURN(ERR_PTR(-ENOMEM));
119
120         if (inode->i_state & I_NEW) {
121                 rc = ll_read_inode2(inode, md);
122                 if (rc == 0 && S_ISREG(inode->i_mode) &&
123                     ll_i2info(inode)->lli_clob == NULL)
124                         rc = cl_file_inode_init(inode, md);
125
126                 if (rc != 0) {
127                         /* Let's clear directory lsm here, otherwise
128                          * make_bad_inode() will reset the inode mode
129                          * to regular, then ll_clear_inode will not
130                          * be able to clear lsm_md */
131                         if (S_ISDIR(inode->i_mode))
132                                 ll_dir_clear_lsm_md(inode);
133                         make_bad_inode(inode);
134                         unlock_new_inode(inode);
135                         iput(inode);
136                         inode = ERR_PTR(rc);
137                 } else {
138                         inode_has_no_xattr(inode);
139                         unlock_new_inode(inode);
140                 }
141         } else if (is_bad_inode(inode)) {
142                 iput(inode);
143                 inode = ERR_PTR(-ESTALE);
144         } else if (!(inode->i_state & (I_FREEING | I_CLEAR))) {
145                 rc = ll_update_inode(inode, md);
146                 CDEBUG(D_VFSTRACE, "got inode: "DFID"(%p): rc = %d\n",
147                        PFID(&md->body->mbo_fid1), inode, rc);
148                 if (rc != 0) {
149                         if (S_ISDIR(inode->i_mode))
150                                 ll_dir_clear_lsm_md(inode);
151                         iput(inode);
152                         inode = ERR_PTR(rc);
153                 }
154         }
155
156         RETURN(inode);
157 }
158
159 static void ll_invalidate_negative_children(struct inode *dir)
160 {
161         struct dentry *dentry, *tmp_subdir;
162         DECLARE_LL_D_HLIST_NODE_PTR(p);
163
164         ll_lock_dcache(dir);
165         ll_d_hlist_for_each_entry(dentry, p, &dir->i_dentry) {
166                 spin_lock(&dentry->d_lock);
167                 if (!list_empty(&dentry->d_subdirs)) {
168                         struct dentry *child;
169
170                         list_for_each_entry_safe(child, tmp_subdir,
171                                                  &dentry->d_subdirs,
172                                                  d_child) {
173                                 if (child->d_inode == NULL)
174                                         d_lustre_invalidate(child, 1);
175                         }
176                 }
177                 spin_unlock(&dentry->d_lock);
178         }
179         ll_unlock_dcache(dir);
180 }
181
182 int ll_test_inode_by_fid(struct inode *inode, void *opaque)
183 {
184         return lu_fid_eq(&ll_i2info(inode)->lli_fid, opaque);
185 }
186
187 int ll_dom_lock_cancel(struct inode *inode, struct ldlm_lock *lock)
188 {
189         struct lu_env *env;
190         struct ll_inode_info *lli = ll_i2info(inode);
191         struct cl_layout clt = { .cl_layout_gen = 0, };
192         int rc;
193         __u16 refcheck;
194
195
196         ENTRY;
197
198         if (!lli->lli_clob) {
199                 /* due to DoM read on open, there may exist pages for Lustre
200                  * regular file even though cl_object is not set up yet. */
201                 truncate_inode_pages(inode->i_mapping, 0);
202                 RETURN(0);
203         }
204
205         env = cl_env_get(&refcheck);
206         if (IS_ERR(env))
207                 RETURN(PTR_ERR(env));
208
209         rc = cl_object_layout_get(env, lli->lli_clob, &clt);
210         if (rc) {
211                 CDEBUG(D_INODE, "Cannot get layout for "DFID"\n",
212                        PFID(ll_inode2fid(inode)));
213                 rc = -ENODATA;
214         } else if (clt.cl_size == 0 || clt.cl_dom_comp_size == 0) {
215                 CDEBUG(D_INODE, "DOM lock without DOM layout for "DFID"\n",
216                        PFID(ll_inode2fid(inode)));
217         } else {
218                 enum cl_fsync_mode mode;
219                 loff_t end = clt.cl_dom_comp_size - 1;
220
221                 mode = ldlm_is_discard_data(lock) ?
222                                         CL_FSYNC_DISCARD : CL_FSYNC_LOCAL;
223                 rc = cl_sync_file_range(inode, 0, end, mode, 1);
224                 truncate_inode_pages_range(inode->i_mapping, 0, end);
225         }
226         cl_env_put(env, &refcheck);
227         RETURN(rc);
228 }
229
230 void ll_lock_cancel_bits(struct ldlm_lock *lock, __u64 to_cancel)
231 {
232         struct inode *inode = ll_inode_from_resource_lock(lock);
233         struct ll_inode_info *lli;
234         __u64 bits = to_cancel;
235         int rc;
236
237         ENTRY;
238
239         if (!inode) {
240                 /* That means the inode is evicted most likely and may cause
241                  * the skipping of lock cleanups below, so print the message
242                  * about that in log.
243                  */
244                 if (lock->l_resource->lr_lvb_inode)
245                         LDLM_DEBUG(lock,
246                                    "can't take inode for the lock (%sevicted)\n",
247                                    lock->l_resource->lr_lvb_inode->i_state &
248                                    I_FREEING ? "" : "not ");
249                 RETURN_EXIT;
250         }
251
252         if (!fid_res_name_eq(ll_inode2fid(inode),
253                              &lock->l_resource->lr_name)) {
254                 LDLM_ERROR(lock, "data mismatch with object "DFID"(%p)",
255                            PFID(ll_inode2fid(inode)), inode);
256                 LBUG();
257         }
258
259         if (bits & MDS_INODELOCK_XATTR) {
260                 ll_xattr_cache_destroy(inode);
261                 bits &= ~MDS_INODELOCK_XATTR;
262         }
263
264         /* For OPEN locks we differentiate between lock modes
265          * LCK_CR, LCK_CW, LCK_PR - bug 22891 */
266         if (bits & MDS_INODELOCK_OPEN)
267                 ll_have_md_lock(inode, &bits, lock->l_req_mode);
268
269         if (bits & MDS_INODELOCK_OPEN) {
270                 fmode_t fmode;
271
272                 switch (lock->l_req_mode) {
273                 case LCK_CW:
274                         fmode = FMODE_WRITE;
275                         break;
276                 case LCK_PR:
277                         fmode = FMODE_EXEC;
278                         break;
279                 case LCK_CR:
280                         fmode = FMODE_READ;
281                         break;
282                 default:
283                         LDLM_ERROR(lock, "bad lock mode for OPEN lock");
284                         LBUG();
285                 }
286
287                 ll_md_real_close(inode, fmode);
288
289                 bits &= ~MDS_INODELOCK_OPEN;
290         }
291
292         if (bits & (MDS_INODELOCK_LOOKUP | MDS_INODELOCK_UPDATE |
293                     MDS_INODELOCK_LAYOUT | MDS_INODELOCK_PERM |
294                     MDS_INODELOCK_DOM))
295                 ll_have_md_lock(inode, &bits, LCK_MINMODE);
296
297         if (bits & MDS_INODELOCK_DOM) {
298                 rc =  ll_dom_lock_cancel(inode, lock);
299                 if (rc < 0)
300                         CDEBUG(D_INODE, "cannot flush DoM data "
301                                DFID": rc = %d\n",
302                                PFID(ll_inode2fid(inode)), rc);
303                 lock_res_and_lock(lock);
304                 ldlm_set_kms_ignore(lock);
305                 unlock_res_and_lock(lock);
306         }
307
308         if (bits & MDS_INODELOCK_LAYOUT) {
309                 struct cl_object_conf conf = {
310                         .coc_opc = OBJECT_CONF_INVALIDATE,
311                         .coc_inode = inode,
312                 };
313
314                 rc = ll_layout_conf(inode, &conf);
315                 if (rc < 0)
316                         CDEBUG(D_INODE, "cannot invalidate layout of "
317                                DFID": rc = %d\n",
318                                PFID(ll_inode2fid(inode)), rc);
319         }
320
321         lli = ll_i2info(inode);
322
323         if (bits & MDS_INODELOCK_UPDATE)
324                 lli->lli_update_atime = 1;
325
326         if ((bits & MDS_INODELOCK_UPDATE) && S_ISDIR(inode->i_mode)) {
327                 CDEBUG(D_INODE, "invalidating inode "DFID" lli = %p, "
328                        "pfid  = "DFID"\n", PFID(ll_inode2fid(inode)),
329                        lli, PFID(&lli->lli_pfid));
330                 truncate_inode_pages(inode->i_mapping, 0);
331
332                 if (unlikely(!fid_is_zero(&lli->lli_pfid))) {
333                         struct inode *master_inode = NULL;
334                         unsigned long hash;
335
336                         /* This is slave inode, since all of the child dentry
337                          * is connected on the master inode, so we have to
338                          * invalidate the negative children on master inode */
339                         CDEBUG(D_INODE, "Invalidate s"DFID" m"DFID"\n",
340                                PFID(ll_inode2fid(inode)), PFID(&lli->lli_pfid));
341
342                         hash = cl_fid_build_ino(&lli->lli_pfid,
343                                         ll_need_32bit_api(ll_i2sbi(inode)));
344
345                         /* Do not lookup the inode with ilookup5, otherwise
346                          * it will cause dead lock,
347                          * 1. Client1 send chmod req to the MDT0, then on MDT0,
348                          * it enqueues master and all of its slaves lock,
349                          * (mdt_attr_set() -> mdt_lock_slaves()), after gets
350                          * master and stripe0 lock, it will send the enqueue
351                          * req (for stripe1) to MDT1, then MDT1 finds the lock
352                          * has been granted to client2. Then MDT1 sends blocking
353                          * ast to client2.
354                          * 2. At the same time, client2 tries to unlink
355                          * the striped dir (rm -rf striped_dir), and during
356                          * lookup, it will hold the master inode of the striped
357                          * directory, whose inode state is NEW, then tries to
358                          * revalidate all of its slaves, (ll_prep_inode()->
359                          * ll_iget()->ll_read_inode2()-> ll_update_inode().).
360                          * And it will be blocked on the server side because
361                          * of 1.
362                          * 3. Then the client get the blocking_ast req, cancel
363                          * the lock, but being blocked if using ->ilookup5()),
364                          * because master inode state is NEW. */
365                         master_inode = ilookup5_nowait(inode->i_sb, hash,
366                                                         ll_test_inode_by_fid,
367                                                         (void *)&lli->lli_pfid);
368                         if (master_inode) {
369                                 ll_invalidate_negative_children(master_inode);
370                                 iput(master_inode);
371                         }
372                 } else {
373                         ll_invalidate_negative_children(inode);
374                 }
375         }
376
377         if ((bits & (MDS_INODELOCK_LOOKUP | MDS_INODELOCK_PERM)) &&
378             inode->i_sb->s_root != NULL &&
379             inode != inode->i_sb->s_root->d_inode)
380                 ll_invalidate_aliases(inode);
381
382         iput(inode);
383         RETURN_EXIT;
384 }
385
386 /* Check if the given lock may be downgraded instead of canceling and
387  * that convert is really needed. */
388 int ll_md_need_convert(struct ldlm_lock *lock)
389 {
390         struct ldlm_namespace *ns = ldlm_lock_to_ns(lock);
391         struct inode *inode;
392         __u64 wanted = lock->l_policy_data.l_inodebits.cancel_bits;
393         __u64 bits = lock->l_policy_data.l_inodebits.bits & ~wanted;
394         enum ldlm_mode mode = LCK_MINMODE;
395
396         if (!lock->l_conn_export ||
397             !exp_connect_lock_convert(lock->l_conn_export))
398                 return 0;
399
400         if (!wanted || !bits || ldlm_is_cancel(lock))
401                 return 0;
402
403         /* do not convert locks other than DOM for now */
404         if (!((bits | wanted) & MDS_INODELOCK_DOM))
405                 return 0;
406
407         /* We may have already remaining bits in some other lock so
408          * lock convert will leave us just extra lock for the same bit.
409          * Check if client has other lock with the same bits and the same
410          * or lower mode and don't convert if any.
411          */
412         switch (lock->l_req_mode) {
413         case LCK_PR:
414                 mode = LCK_PR;
415         case LCK_PW:
416                 mode |= LCK_CR;
417                 break;
418         case LCK_CW:
419                 mode = LCK_CW;
420         case LCK_CR:
421                 mode |= LCK_CR;
422                 break;
423         default:
424                 /* do not convert other modes */
425                 return 0;
426         }
427
428         /* is lock is too old to be converted? */
429         lock_res_and_lock(lock);
430         if (ktime_after(ktime_get(),
431                         ktime_add(lock->l_last_used,
432                                   ktime_set(ns->ns_dirty_age_limit, 0)))) {
433                 unlock_res_and_lock(lock);
434                 return 0;
435         }
436         unlock_res_and_lock(lock);
437
438         inode = ll_inode_from_resource_lock(lock);
439         ll_have_md_lock(inode, &bits, mode);
440         iput(inode);
441         return !!(bits);
442 }
443
444 int ll_md_blocking_ast(struct ldlm_lock *lock, struct ldlm_lock_desc *desc,
445                        void *data, int flag)
446 {
447         struct lustre_handle lockh;
448         __u64 bits = lock->l_policy_data.l_inodebits.bits;
449         int rc;
450
451         ENTRY;
452
453         switch (flag) {
454         case LDLM_CB_BLOCKING:
455         {
456                 __u64 cancel_flags = LCF_ASYNC;
457
458                 if (ll_md_need_convert(lock)) {
459                         cancel_flags |= LCF_CONVERT;
460                         /* For lock convert some cancel actions may require
461                          * this lock with non-dropped canceled bits, e.g. page
462                          * flush for DOM lock. So call ll_lock_cancel_bits()
463                          * here while canceled bits are still set.
464                          */
465                         bits = lock->l_policy_data.l_inodebits.cancel_bits;
466                         if (bits & MDS_INODELOCK_DOM)
467                                 ll_lock_cancel_bits(lock, MDS_INODELOCK_DOM);
468                 }
469                 ldlm_lock2handle(lock, &lockh);
470                 rc = ldlm_cli_cancel(&lockh, cancel_flags);
471                 if (rc < 0) {
472                         CDEBUG(D_INODE, "ldlm_cli_cancel: rc = %d\n", rc);
473                         RETURN(rc);
474                 }
475                 break;
476         }
477         case LDLM_CB_CANCELING:
478                 /* Nothing to do for non-granted locks */
479                 if (!ldlm_is_granted(lock))
480                         break;
481
482                 if (ldlm_is_converting(lock)) {
483                         /* this is called on already converted lock, so
484                          * ibits has remained bits only and cancel_bits
485                          * are bits that were dropped.
486                          * Note that DOM lock is handled prior lock convert
487                          * and is excluded here.
488                          */
489                         bits = lock->l_policy_data.l_inodebits.cancel_bits &
490                                 ~MDS_INODELOCK_DOM;
491                 } else {
492                         LASSERT(ldlm_is_canceling(lock));
493                 }
494                 ll_lock_cancel_bits(lock, bits);
495                 break;
496         default:
497                 LBUG();
498         }
499
500         RETURN(0);
501 }
502
503 __u32 ll_i2suppgid(struct inode *i)
504 {
505         if (in_group_p(i->i_gid))
506                 return (__u32)from_kgid(&init_user_ns, i->i_gid);
507         else
508                 return (__u32) __kgid_val(INVALID_GID);
509 }
510
511 /* Pack the required supplementary groups into the supplied groups array.
512  * If we don't need to use the groups from the target inode(s) then we
513  * instead pack one or more groups from the user's supplementary group
514  * array in case it might be useful.  Not needed if doing an MDS-side upcall. */
515 void ll_i2gids(__u32 *suppgids, struct inode *i1, struct inode *i2)
516 {
517         LASSERT(i1 != NULL);
518         LASSERT(suppgids != NULL);
519
520         suppgids[0] = ll_i2suppgid(i1);
521
522         if (i2)
523                 suppgids[1] = ll_i2suppgid(i2);
524         else
525                 suppgids[1] = -1;
526 }
527
528 /*
529  * try to reuse three types of dentry:
530  * 1. unhashed alias, this one is unhashed by d_invalidate (but it may be valid
531  *    by concurrent .revalidate).
532  * 2. INVALID alias (common case for no valid ldlm lock held, but this flag may
533  *    be cleared by others calling d_lustre_revalidate).
534  * 3. DISCONNECTED alias.
535  */
536 static struct dentry *ll_find_alias(struct inode *inode, struct dentry *dentry)
537 {
538         struct dentry *alias, *discon_alias, *invalid_alias;
539         DECLARE_LL_D_HLIST_NODE_PTR(p);
540
541         if (ll_d_hlist_empty(&inode->i_dentry))
542                 return NULL;
543
544         discon_alias = invalid_alias = NULL;
545
546         ll_lock_dcache(inode);
547         ll_d_hlist_for_each_entry(alias, p, &inode->i_dentry) {
548                 LASSERT(alias != dentry);
549
550                 spin_lock(&alias->d_lock);
551                 if ((alias->d_flags & DCACHE_DISCONNECTED) &&
552                     S_ISDIR(inode->i_mode))
553                         /* LASSERT(last_discon == NULL); LU-405, bz 20055 */
554                         discon_alias = alias;
555                 else if (alias->d_parent == dentry->d_parent             &&
556                          alias->d_name.hash == dentry->d_name.hash       &&
557                          alias->d_name.len == dentry->d_name.len         &&
558                          memcmp(alias->d_name.name, dentry->d_name.name,
559                                 dentry->d_name.len) == 0)
560                         invalid_alias = alias;
561                 spin_unlock(&alias->d_lock);
562
563                 if (invalid_alias)
564                         break;
565         }
566         alias = invalid_alias ?: discon_alias ?: NULL;
567         if (alias) {
568                 spin_lock(&alias->d_lock);
569                 dget_dlock(alias);
570                 spin_unlock(&alias->d_lock);
571         }
572         ll_unlock_dcache(inode);
573
574         return alias;
575 }
576
577 /*
578  * Similar to d_splice_alias(), but lustre treats invalid alias
579  * similar to DCACHE_DISCONNECTED, and tries to use it anyway.
580  */
581 struct dentry *ll_splice_alias(struct inode *inode, struct dentry *de)
582 {
583         struct dentry *new;
584         int rc;
585
586         if (inode) {
587                 new = ll_find_alias(inode, de);
588                 if (new) {
589                         rc = ll_d_init(new);
590                         if (rc < 0) {
591                                 dput(new);
592                                 return ERR_PTR(rc);
593                         }
594                         d_move(new, de);
595                         iput(inode);
596                         CDEBUG(D_DENTRY,
597                                "Reuse dentry %p inode %p refc %d flags %#x\n",
598                               new, new->d_inode, ll_d_count(new), new->d_flags);
599                         return new;
600                 }
601         }
602         rc = ll_d_init(de);
603         if (rc < 0)
604                 return ERR_PTR(rc);
605         d_add(de, inode);
606         CDEBUG(D_DENTRY, "Add dentry %p inode %p refc %d flags %#x\n",
607                de, de->d_inode, ll_d_count(de), de->d_flags);
608         return de;
609 }
610
611 static int ll_lookup_it_finish(struct ptlrpc_request *request,
612                                struct lookup_intent *it,
613                                struct inode *parent, struct dentry **de,
614                                void *secctx, __u32 secctxlen)
615 {
616         struct inode             *inode = NULL;
617         __u64                     bits = 0;
618         int                       rc;
619         struct dentry *alias;
620         ENTRY;
621
622         /* NB 1 request reference will be taken away by ll_intent_lock()
623          * when I return */
624         CDEBUG(D_DENTRY, "it %p it_disposition %x\n", it,
625                it->it_disposition);
626         if (!it_disposition(it, DISP_LOOKUP_NEG)) {
627                 struct req_capsule *pill = &request->rq_pill;
628                 struct mdt_body *body = req_capsule_server_get(pill,
629                                                                &RMF_MDT_BODY);
630
631                 rc = ll_prep_inode(&inode, request, (*de)->d_sb, it);
632                 if (rc)
633                         RETURN(rc);
634
635                 if (it->it_op & IT_OPEN)
636                         ll_dom_finish_open(inode, request, it);
637
638                 ll_set_lock_data(ll_i2sbi(parent)->ll_md_exp, inode, it, &bits);
639
640                 /* We used to query real size from OSTs here, but actually
641                  * this is not needed. For stat() calls size would be updated
642                  * from subsequent do_revalidate()->ll_inode_revalidate_it() in
643                  * 2.4 and
644                  * vfs_getattr_it->ll_getattr()->ll_inode_revalidate_it() in 2.6
645                  * Everybody else who needs correct file size would call
646                  * ll_glimpse_size or some equivalent themselves anyway.
647                  * Also see bug 7198.
648                  */
649
650                 /* If security context was returned by MDT, put it in
651                  * inode now to save an extra getxattr from security hooks,
652                  * and avoid deadlock.
653                  */
654                 if (body->mbo_valid & OBD_MD_SECCTX) {
655                         secctx = req_capsule_server_get(pill, &RMF_FILE_SECCTX);
656                         secctxlen = req_capsule_get_size(pill,
657                                                            &RMF_FILE_SECCTX,
658                                                            RCL_SERVER);
659
660                         if (secctxlen)
661                                 CDEBUG(D_SEC, "server returned security context"
662                                        " for "DFID"\n",
663                                        PFID(ll_inode2fid(inode)));
664                 }
665
666                 if (secctx != NULL && secctxlen != 0) {
667                         inode_lock(inode);
668                         rc = security_inode_notifysecctx(inode, secctx,
669                                                          secctxlen);
670                         inode_unlock(inode);
671                         if (rc)
672                                 CWARN("cannot set security context for "
673                                       DFID": rc = %d\n",
674                                       PFID(ll_inode2fid(inode)), rc);
675                 }
676         }
677
678         /* Only hash *de if it is unhashed (new dentry).
679          * Atoimc_open may passin hashed dentries for open.
680          */
681         alias = ll_splice_alias(inode, *de);
682         if (IS_ERR(alias))
683                 GOTO(out, rc = PTR_ERR(alias));
684
685         *de = alias;
686
687         if (!it_disposition(it, DISP_LOOKUP_NEG)) {
688                 /* we have lookup look - unhide dentry */
689                 if (bits & MDS_INODELOCK_LOOKUP)
690                         d_lustre_revalidate(*de);
691         } else if (!it_disposition(it, DISP_OPEN_CREATE)) {
692                 /*
693                  * If file was created on the server, the dentry is revalidated
694                  * in ll_create_it if the lock allows for it.
695                  */
696                 /* Check that parent has UPDATE lock. */
697                 struct lookup_intent parent_it = {
698                                         .it_op = IT_GETATTR,
699                                         .it_lock_handle = 0 };
700                 struct lu_fid   fid = ll_i2info(parent)->lli_fid;
701
702                 /* If it is striped directory, get the real stripe parent */
703                 if (unlikely(ll_dir_striped(parent))) {
704                         rc = md_get_fid_from_lsm(ll_i2mdexp(parent),
705                                                  ll_i2info(parent)->lli_lsm_md,
706                                                  (*de)->d_name.name,
707                                                  (*de)->d_name.len, &fid);
708                         if (rc != 0)
709                                 GOTO(out, rc);
710                 }
711
712                 if (md_revalidate_lock(ll_i2mdexp(parent), &parent_it, &fid,
713                                        NULL)) {
714                         d_lustre_revalidate(*de);
715                         ll_intent_release(&parent_it);
716                 }
717         }
718
719         GOTO(out, rc = 0);
720
721 out:
722         if (rc != 0 && it->it_op & IT_OPEN)
723                 ll_open_cleanup((*de)->d_sb, request);
724
725         return rc;
726 }
727
728 struct pcc_create_attach {
729         struct pcc_dataset *pca_dataset;
730         struct dentry *pca_dentry;
731 };
732
733 static struct dentry *ll_lookup_it(struct inode *parent, struct dentry *dentry,
734                                    struct lookup_intent *it,
735                                    void **secctx, __u32 *secctxlen,
736                                    struct pcc_create_attach *pca)
737 {
738         struct lookup_intent lookup_it = { .it_op = IT_LOOKUP };
739         struct dentry *save = dentry, *retval;
740         struct ptlrpc_request *req = NULL;
741         struct md_op_data *op_data = NULL;
742         struct lov_user_md *lum = NULL;
743         __u32 opc;
744         int rc;
745         char secctx_name[XATTR_NAME_MAX + 1];
746
747         ENTRY;
748
749         if (dentry->d_name.len > ll_i2sbi(parent)->ll_namelen)
750                 RETURN(ERR_PTR(-ENAMETOOLONG));
751
752         CDEBUG(D_VFSTRACE, "VFS Op:name=%.*s, dir="DFID"(%p), intent=%s\n",
753                dentry->d_name.len, dentry->d_name.name,
754                PFID(ll_inode2fid(parent)), parent, LL_IT2STR(it));
755
756         if (d_mountpoint(dentry))
757                 CERROR("Tell Peter, lookup on mtpt, it %s\n", LL_IT2STR(it));
758
759         if (it == NULL || it->it_op == IT_GETXATTR)
760                 it = &lookup_it;
761
762         if (it->it_op == IT_GETATTR && dentry_may_statahead(parent, dentry)) {
763                 rc = ll_statahead(parent, &dentry, 0);
764                 if (rc == 1)
765                         RETURN(dentry == save ? NULL : dentry);
766         }
767
768         if (it->it_op & IT_OPEN && it->it_flags & FMODE_WRITE &&
769             dentry->d_sb->s_flags & SB_RDONLY)
770                 RETURN(ERR_PTR(-EROFS));
771
772         if (it->it_op & IT_CREAT)
773                 opc = LUSTRE_OPC_CREATE;
774         else
775                 opc = LUSTRE_OPC_ANY;
776
777         op_data = ll_prep_md_op_data(NULL, parent, NULL, dentry->d_name.name,
778                                      dentry->d_name.len, 0, opc, NULL);
779         if (IS_ERR(op_data))
780                 GOTO(out, retval = ERR_CAST(op_data));
781
782         /* enforce umask if acl disabled or MDS doesn't support umask */
783         if (!IS_POSIXACL(parent) || !exp_connect_umask(ll_i2mdexp(parent)))
784                 it->it_create_mode &= ~current_umask();
785
786         if (it->it_op & IT_CREAT &&
787             ll_i2sbi(parent)->ll_flags & LL_SBI_FILE_SECCTX) {
788                 rc = ll_dentry_init_security(dentry, it->it_create_mode,
789                                              &dentry->d_name,
790                                              &op_data->op_file_secctx_name,
791                                              &op_data->op_file_secctx,
792                                              &op_data->op_file_secctx_size);
793                 if (rc < 0)
794                         GOTO(out, retval = ERR_PTR(rc));
795                 if (secctx != NULL)
796                         *secctx = op_data->op_file_secctx;
797                 if (secctxlen != NULL)
798                         *secctxlen = op_data->op_file_secctx_size;
799         } else {
800                 if (secctx != NULL)
801                         *secctx = NULL;
802                 if (secctxlen != NULL)
803                         *secctxlen = 0;
804         }
805
806         /* ask for security context upon intent */
807         if (it->it_op & (IT_LOOKUP | IT_GETATTR | IT_OPEN)) {
808                 /* get name of security xattr to request to server */
809                 rc = ll_listsecurity(parent, secctx_name,
810                                      sizeof(secctx_name));
811                 if (rc < 0) {
812                         CDEBUG(D_SEC, "cannot get security xattr name for "
813                                DFID": rc = %d\n",
814                                PFID(ll_inode2fid(parent)), rc);
815                 } else if (rc > 0) {
816                         op_data->op_file_secctx_name = secctx_name;
817                         op_data->op_file_secctx_name_size = rc;
818                         CDEBUG(D_SEC, "'%.*s' is security xattr for "DFID"\n",
819                                rc, secctx_name, PFID(ll_inode2fid(parent)));
820                 }
821         }
822
823         if (pca && pca->pca_dataset) {
824                 struct pcc_dataset *dataset = pca->pca_dataset;
825
826                 OBD_ALLOC_PTR(lum);
827                 if (lum == NULL)
828                         GOTO(out, retval = ERR_PTR(-ENOMEM));
829
830                 lum->lmm_magic = LOV_USER_MAGIC_V1;
831                 lum->lmm_pattern = LOV_PATTERN_F_RELEASED | LOV_PATTERN_RAID0;
832                 op_data->op_data = lum;
833                 op_data->op_data_size = sizeof(*lum);
834                 op_data->op_archive_id = dataset->pccd_rwid;
835
836                 rc = obd_fid_alloc(NULL, ll_i2mdexp(parent), &op_data->op_fid2,
837                                    op_data);
838                 if (rc)
839                         GOTO(out, retval = ERR_PTR(rc));
840
841                 rc = pcc_inode_create(parent->i_sb, dataset, &op_data->op_fid2,
842                                       &pca->pca_dentry);
843                 if (rc)
844                         GOTO(out, retval = ERR_PTR(rc));
845
846                 it->it_flags |= MDS_OPEN_PCC;
847         }
848
849         rc = md_intent_lock(ll_i2mdexp(parent), op_data, it, &req,
850                             &ll_md_blocking_ast, 0);
851         /* If the MDS allows the client to chgrp (CFS_SETGRP_PERM), but the
852          * client does not know which suppgid should be sent to the MDS, or
853          * some other(s) changed the target file's GID after this RPC sent
854          * to the MDS with the suppgid as the original GID, then we should
855          * try again with right suppgid. */
856         if (rc == -EACCES && it->it_op & IT_OPEN &&
857             it_disposition(it, DISP_OPEN_DENY)) {
858                 struct mdt_body *body;
859
860                 LASSERT(req != NULL);
861
862                 body = req_capsule_server_get(&req->rq_pill, &RMF_MDT_BODY);
863                 if (op_data->op_suppgids[0] == body->mbo_gid ||
864                     op_data->op_suppgids[1] == body->mbo_gid ||
865                     !in_group_p(make_kgid(&init_user_ns, body->mbo_gid)))
866                         GOTO(out, retval = ERR_PTR(-EACCES));
867
868                 fid_zero(&op_data->op_fid2);
869                 op_data->op_suppgids[1] = body->mbo_gid;
870                 ptlrpc_req_finished(req);
871                 req = NULL;
872                 ll_intent_release(it);
873                 rc = md_intent_lock(ll_i2mdexp(parent), op_data, it, &req,
874                                     &ll_md_blocking_ast, 0);
875         }
876
877         if (rc < 0)
878                 GOTO(out, retval = ERR_PTR(rc));
879
880         /* dir layout may change */
881         ll_unlock_md_op_lsm(op_data);
882         rc = ll_lookup_it_finish(req, it, parent, &dentry,
883                                  secctx != NULL ? *secctx : NULL,
884                                  secctxlen != NULL ? *secctxlen : 0);
885         if (rc != 0) {
886                 ll_intent_release(it);
887                 GOTO(out, retval = ERR_PTR(rc));
888         }
889
890         if ((it->it_op & IT_OPEN) && dentry->d_inode &&
891             !S_ISREG(dentry->d_inode->i_mode) &&
892             !S_ISDIR(dentry->d_inode->i_mode)) {
893                 ll_release_openhandle(dentry, it);
894         }
895         ll_lookup_finish_locks(it, dentry);
896
897         GOTO(out, retval = (dentry == save) ? NULL : dentry);
898
899 out:
900         if (op_data != NULL && !IS_ERR(op_data)) {
901                 if (secctx != NULL && secctxlen != NULL) {
902                         /* caller needs sec ctx info, so reset it in op_data to
903                          * prevent it from being freed */
904                         op_data->op_file_secctx = NULL;
905                         op_data->op_file_secctx_size = 0;
906                 }
907                 ll_finish_md_op_data(op_data);
908         }
909
910         if (lum != NULL)
911                 OBD_FREE_PTR(lum);
912
913         ptlrpc_req_finished(req);
914         return retval;
915 }
916
917 #ifdef HAVE_IOP_ATOMIC_OPEN
918 static struct dentry *ll_lookup_nd(struct inode *parent, struct dentry *dentry,
919                                    unsigned int flags)
920 {
921         struct lookup_intent *itp, it = { .it_op = IT_GETATTR };
922         struct dentry *de;
923
924         CDEBUG(D_VFSTRACE, "VFS Op:name=%.*s, dir="DFID"(%p), flags=%u\n",
925                dentry->d_name.len, dentry->d_name.name,
926                PFID(ll_inode2fid(parent)), parent, flags);
927
928         /*
929          * Optimize away (CREATE && !OPEN). Let .create handle the race.
930          * but only if we have write permissions there, otherwise we need
931          * to proceed with lookup. LU-4185
932          */
933         if ((flags & LOOKUP_CREATE) && !(flags & LOOKUP_OPEN) &&
934             (inode_permission(parent, MAY_WRITE | MAY_EXEC) == 0))
935                 return NULL;
936
937         if (flags & (LOOKUP_PARENT|LOOKUP_OPEN|LOOKUP_CREATE))
938                 itp = NULL;
939         else
940                 itp = &it;
941         de = ll_lookup_it(parent, dentry, itp, NULL, NULL, NULL);
942
943         if (itp != NULL)
944                 ll_intent_release(itp);
945
946         return de;
947 }
948
949 #ifdef FMODE_CREATED /* added in Linux v4.18-rc1-20-g73a09dd */
950 # define ll_is_opened(o, f)             ((f)->f_mode & FMODE_OPENED)
951 # define ll_finish_open(f, d, o)        finish_open((f), (d), NULL)
952 # define ll_last_arg
953 # define ll_set_created(o, f)                                           \
954 do {                                                                    \
955         (f)->f_mode |= FMODE_CREATED;                                   \
956 } while (0)
957
958 #else
959 # define ll_is_opened(o, f)             (*(o))
960 # define ll_finish_open(f, d, o)        finish_open((f), (d), NULL, (o))
961 # define ll_last_arg                    , int *opened
962 # define ll_set_created(o, f)                                           \
963 do {                                                                    \
964         *(o) |= FILE_CREATED;                                           \
965 } while (0)
966
967 #endif
968
969 /*
970  * For cached negative dentry and new dentry, handle lookup/create/open
971  * together.
972  */
973 static int ll_atomic_open(struct inode *dir, struct dentry *dentry,
974                           struct file *file, unsigned open_flags,
975                           umode_t mode ll_last_arg)
976 {
977         struct lookup_intent *it;
978         struct dentry *de;
979         long long lookup_flags = LOOKUP_OPEN;
980         void *secctx = NULL;
981         __u32 secctxlen = 0;
982         struct ll_sb_info *sbi;
983         struct pcc_create_attach pca = {NULL, NULL};
984         struct pcc_dataset *dataset = NULL;
985         int rc = 0;
986         ENTRY;
987
988         CDEBUG(D_VFSTRACE, "VFS Op:name=%.*s, dir="DFID"(%p), file %p,"
989                            "open_flags %x, mode %x opened %d\n",
990                dentry->d_name.len, dentry->d_name.name,
991                PFID(ll_inode2fid(dir)), dir, file, open_flags, mode,
992                ll_is_opened(opened, file));
993
994         /* Only negative dentries enter here */
995         LASSERT(dentry->d_inode == NULL);
996
997         if (!d_unhashed(dentry)) {
998                 /* A valid negative dentry that just passed revalidation,
999                  * there's little point to try and open it server-side,
1000                  * even though there's a minuscule chance it might succeed.
1001                  * Either way it's a valid race to just return -ENOENT here.
1002                  */
1003                 if (!(open_flags & O_CREAT))
1004                         return -ENOENT;
1005
1006                 /* Otherwise we just unhash it to be rehashed afresh via
1007                  * lookup if necessary
1008                  */
1009                 d_drop(dentry);
1010         }
1011
1012         OBD_ALLOC(it, sizeof(*it));
1013         if (!it)
1014                 RETURN(-ENOMEM);
1015
1016         it->it_op = IT_OPEN;
1017         if (open_flags & O_CREAT) {
1018                 it->it_op |= IT_CREAT;
1019                 lookup_flags |= LOOKUP_CREATE;
1020                 sbi = ll_i2sbi(dir);
1021                 /* Volatile file is used for HSM restore, so do not use PCC */
1022                 if (!filename_is_volatile(dentry->d_name.name,
1023                                           dentry->d_name.len, NULL)) {
1024                         struct pcc_matcher item;
1025
1026                         item.pm_uid = from_kuid(&init_user_ns, current_uid());
1027                         item.pm_gid = from_kgid(&init_user_ns, current_gid());
1028                         item.pm_projid = ll_i2info(dir)->lli_projid;
1029                         item.pm_name = &dentry->d_name;
1030                         dataset = pcc_dataset_match_get(&sbi->ll_pcc_super,
1031                                                         &item);
1032                         pca.pca_dataset = dataset;
1033                 }
1034         }
1035         it->it_create_mode = (mode & S_IALLUGO) | S_IFREG;
1036         it->it_flags = (open_flags & ~O_ACCMODE) | OPEN_FMODE(open_flags);
1037         it->it_flags &= ~MDS_OPEN_FL_INTERNAL;
1038
1039         /* Dentry added to dcache tree in ll_lookup_it */
1040         de = ll_lookup_it(dir, dentry, it, &secctx, &secctxlen, &pca);
1041         if (IS_ERR(de))
1042                 rc = PTR_ERR(de);
1043         else if (de != NULL)
1044                 dentry = de;
1045
1046         CFS_FAIL_TIMEOUT(OBD_FAIL_LLITE_CREATE_FILE_PAUSE, cfs_fail_val);
1047
1048         if (!rc) {
1049                 if (it_disposition(it, DISP_OPEN_CREATE)) {
1050                         /* Dentry instantiated in ll_create_it. */
1051                         rc = ll_create_it(dir, dentry, it, secctx, secctxlen);
1052                         security_release_secctx(secctx, secctxlen);
1053                         if (rc) {
1054                                 /* We dget in ll_splice_alias. */
1055                                 if (de != NULL)
1056                                         dput(de);
1057                                 goto out_release;
1058                         }
1059                         if (dataset != NULL && dentry->d_inode) {
1060                                 rc = pcc_inode_create_fini(dataset,
1061                                                            dentry->d_inode,
1062                                                            pca.pca_dentry);
1063                                 if (rc) {
1064                                         if (de != NULL)
1065                                                 dput(de);
1066                                         GOTO(out_release, rc);
1067                                 }
1068                         }
1069                         ll_set_created(opened, file);
1070                 }
1071
1072                 if (dentry->d_inode && it_disposition(it, DISP_OPEN_OPEN)) {
1073                         /* Open dentry. */
1074                         if (S_ISFIFO(dentry->d_inode->i_mode)) {
1075                                 /* We cannot call open here as it might
1076                                  * deadlock. This case is unreachable in
1077                                  * practice because of OBD_CONNECT_NODEVOH. */
1078                                 rc = finish_no_open(file, de);
1079                         } else {
1080                                 file->private_data = it;
1081                                 rc = ll_finish_open(file, dentry, opened);
1082                                 /* We dget in ll_splice_alias. finish_open takes
1083                                  * care of dget for fd open.
1084                                  */
1085                                 if (de != NULL)
1086                                         dput(de);
1087                         }
1088                 } else {
1089                         rc = finish_no_open(file, de);
1090                 }
1091         }
1092
1093 out_release:
1094         if (dataset != NULL)
1095                 pcc_dataset_put(dataset);
1096         ll_intent_release(it);
1097         OBD_FREE(it, sizeof(*it));
1098
1099         RETURN(rc);
1100 }
1101
1102 #else /* !HAVE_IOP_ATOMIC_OPEN */
1103 static struct lookup_intent *
1104 ll_convert_intent(struct open_intent *oit, int lookup_flags, bool is_readonly)
1105 {
1106         struct lookup_intent *it;
1107
1108         OBD_ALLOC_PTR(it);
1109         if (!it)
1110                 return ERR_PTR(-ENOMEM);
1111
1112         if (lookup_flags & LOOKUP_OPEN) {
1113                 it->it_op = IT_OPEN;
1114                 /* Avoid file creation for ro bind mount point(is_readonly) */
1115                 if ((lookup_flags & LOOKUP_CREATE) && !is_readonly)
1116                         it->it_op |= IT_CREAT;
1117                 it->it_create_mode = (oit->create_mode & S_IALLUGO) | S_IFREG;
1118                 it->it_flags = ll_namei_to_lookup_intent_flag(oit->flags &
1119                                                 ~(is_readonly ? O_CREAT : 0));
1120                 it->it_flags &= ~MDS_OPEN_FL_INTERNAL;
1121         } else {
1122                 it->it_op = IT_GETATTR;
1123         }
1124
1125         return it;
1126 }
1127
1128 static struct dentry *ll_lookup_nd(struct inode *parent, struct dentry *dentry,
1129                                    struct nameidata *nd)
1130 {
1131         struct dentry *de;
1132         ENTRY;
1133
1134         if (nd && !(nd->flags & (LOOKUP_CONTINUE|LOOKUP_PARENT))) {
1135                 struct lookup_intent *it;
1136
1137                 if (ll_d2d(dentry) && ll_d2d(dentry)->lld_it) {
1138                         it = ll_d2d(dentry)->lld_it;
1139                         ll_d2d(dentry)->lld_it = NULL;
1140                 } else {
1141                         /*
1142                          * Optimize away (CREATE && !OPEN). Let .create handle
1143                          * the race. But only if we have write permissions
1144                          * there, otherwise we need to proceed with lookup.
1145                          * LU-4185
1146                          */
1147                         if ((nd->flags & LOOKUP_CREATE) &&
1148                             !(nd->flags & LOOKUP_OPEN) &&
1149                             (inode_permission(parent,
1150                                               MAY_WRITE | MAY_EXEC) == 0))
1151                                 RETURN(NULL);
1152
1153                         it = ll_convert_intent(&nd->intent.open, nd->flags,
1154                                 (nd->path.mnt->mnt_flags & MNT_READONLY) ||
1155                                 (nd->path.mnt->mnt_sb->s_flags & SB_RDONLY));
1156                         if (IS_ERR(it))
1157                                 RETURN((struct dentry *)it);
1158                 }
1159
1160                 de = ll_lookup_it(parent, dentry, it, NULL, NULL, NULL);
1161                 if (de)
1162                         dentry = de;
1163                 if ((nd->flags & LOOKUP_OPEN) && !IS_ERR(dentry)) { /* Open */
1164                         if (dentry->d_inode &&
1165                             it_disposition(it, DISP_OPEN_OPEN)) { /* nocreate */
1166                                 if (S_ISFIFO(dentry->d_inode->i_mode)) {
1167                                         /* We cannot call open here as it might
1168                                          * deadlock. This case is unreachable in
1169                                          * practice because of
1170                                          * OBD_CONNECT_NODEVOH. */
1171                                 } else {
1172                                         struct file *filp;
1173
1174                                         nd->intent.open.file->private_data = it;
1175                                         filp = lookup_instantiate_filp(nd,
1176                                                                        dentry,
1177                                                                        NULL);
1178                                         if (IS_ERR(filp)) {
1179                                                 if (de)
1180                                                         dput(de);
1181                                                 de = (struct dentry *)filp;
1182                                         }
1183                                 }
1184                         } else if (it_disposition(it, DISP_OPEN_CREATE)) {
1185                                 /* XXX This can only reliably work on assumption
1186                                  * that there are NO hashed negative dentries.*/
1187                                 ll_d2d(dentry)->lld_it = it;
1188                                 it = NULL; /* Will be freed in ll_create_nd */
1189                                 /* We absolutely depend on ll_create_nd to be
1190                                  * called to not leak this intent and possible
1191                                  * data attached to it */
1192                         }
1193                 }
1194
1195                 if (it) {
1196                         ll_intent_release(it);
1197                         OBD_FREE(it, sizeof(*it));
1198                 }
1199         } else {
1200                 de = ll_lookup_it(parent, dentry, NULL, NULL, NULL, NULL);
1201         }
1202
1203         RETURN(de);
1204 }
1205 #endif /* HAVE_IOP_ATOMIC_OPEN */
1206
1207 /* We depend on "mode" being set with the proper file type/umask by now */
1208 static struct inode *ll_create_node(struct inode *dir, struct lookup_intent *it)
1209 {
1210         struct inode *inode = NULL;
1211         struct ptlrpc_request *request = NULL;
1212         struct ll_sb_info *sbi = ll_i2sbi(dir);
1213         int rc;
1214         ENTRY;
1215
1216         LASSERT(it && it->it_disposition);
1217
1218         LASSERT(it_disposition(it, DISP_ENQ_CREATE_REF));
1219         request = it->it_request;
1220         it_clear_disposition(it, DISP_ENQ_CREATE_REF);
1221         rc = ll_prep_inode(&inode, request, dir->i_sb, it);
1222         if (rc)
1223                 GOTO(out, inode = ERR_PTR(rc));
1224
1225         /* Pause to allow for a race with concurrent access by fid */
1226         OBD_FAIL_TIMEOUT(OBD_FAIL_LLITE_CREATE_NODE_PAUSE, cfs_fail_val);
1227
1228         /* We asked for a lock on the directory, but were granted a
1229          * lock on the inode.  Since we finally have an inode pointer,
1230          * stuff it in the lock. */
1231         CDEBUG(D_DLMTRACE, "setting l_ast_data to inode "DFID"(%p)\n",
1232                PFID(ll_inode2fid(inode)), inode);
1233         ll_set_lock_data(sbi->ll_md_exp, inode, it, NULL);
1234         EXIT;
1235  out:
1236         ptlrpc_req_finished(request);
1237         return inode;
1238 }
1239
1240 /*
1241  * By the time this is called, we already have created the directory cache
1242  * entry for the new file, but it is so far negative - it has no inode.
1243  *
1244  * We defer creating the OBD object(s) until open, to keep the intent and
1245  * non-intent code paths similar, and also because we do not have the MDS
1246  * inode number before calling ll_create_node() (which is needed for LOV),
1247  * so we would need to do yet another RPC to the MDS to store the LOV EA
1248  * data on the MDS.  If needed, we would pass the PACKED lmm as data and
1249  * lmm_size in datalen (the MDS still has code which will handle that).
1250  *
1251  * If the create succeeds, we fill in the inode information
1252  * with d_instantiate().
1253  */
1254 static int ll_create_it(struct inode *dir, struct dentry *dentry,
1255                         struct lookup_intent *it,
1256                         void *secctx, __u32 secctxlen)
1257 {
1258         struct inode *inode;
1259         __u64 bits = 0;
1260         int rc = 0;
1261         ENTRY;
1262
1263         CDEBUG(D_VFSTRACE, "VFS Op:name=%.*s, dir="DFID"(%p), intent=%s\n",
1264                dentry->d_name.len, dentry->d_name.name,
1265                PFID(ll_inode2fid(dir)), dir, LL_IT2STR(it));
1266
1267         rc = it_open_error(DISP_OPEN_CREATE, it);
1268         if (rc)
1269                 RETURN(rc);
1270
1271         inode = ll_create_node(dir, it);
1272         if (IS_ERR(inode))
1273                 RETURN(PTR_ERR(inode));
1274
1275         if ((ll_i2sbi(inode)->ll_flags & LL_SBI_FILE_SECCTX) &&
1276             secctx != NULL) {
1277                 inode_lock(inode);
1278                 /* must be done before d_instantiate, because it calls
1279                  * security_d_instantiate, which means a getxattr if security
1280                  * context is not set yet */
1281                 rc = security_inode_notifysecctx(inode, secctx, secctxlen);
1282                 inode_unlock(inode);
1283                 if (rc)
1284                         RETURN(rc);
1285         }
1286
1287         d_instantiate(dentry, inode);
1288
1289         if (!(ll_i2sbi(inode)->ll_flags & LL_SBI_FILE_SECCTX)) {
1290                 rc = ll_inode_init_security(dentry, inode, dir);
1291                 if (rc)
1292                         RETURN(rc);
1293         }
1294
1295         ll_set_lock_data(ll_i2sbi(dir)->ll_md_exp, inode, it, &bits);
1296         if (bits & MDS_INODELOCK_LOOKUP)
1297                 d_lustre_revalidate(dentry);
1298
1299         RETURN(0);
1300 }
1301
1302 void ll_update_times(struct ptlrpc_request *request, struct inode *inode)
1303 {
1304         struct mdt_body *body = req_capsule_server_get(&request->rq_pill,
1305                                                        &RMF_MDT_BODY);
1306
1307         LASSERT(body);
1308         if (body->mbo_valid & OBD_MD_FLMTIME &&
1309             body->mbo_mtime > inode->i_mtime.tv_sec) {
1310                 CDEBUG(D_INODE,
1311                        "setting fid " DFID " mtime from %lld to %llu\n",
1312                        PFID(ll_inode2fid(inode)),
1313                        (s64)inode->i_mtime.tv_sec, body->mbo_mtime);
1314                 inode->i_mtime.tv_sec = body->mbo_mtime;
1315         }
1316
1317         if (body->mbo_valid & OBD_MD_FLCTIME &&
1318             body->mbo_ctime > inode->i_ctime.tv_sec)
1319                 inode->i_ctime.tv_sec = body->mbo_ctime;
1320 }
1321
1322 static int ll_new_node(struct inode *dir, struct dentry *dchild,
1323                        const char *tgt, umode_t mode, int rdev, __u32 opc)
1324 {
1325         struct qstr *name = &dchild->d_name;
1326         struct ptlrpc_request *request = NULL;
1327         struct md_op_data *op_data;
1328         struct inode *inode = NULL;
1329         struct ll_sb_info *sbi = ll_i2sbi(dir);
1330         int tgt_len = 0;
1331         int err;
1332
1333         ENTRY;
1334         if (unlikely(tgt != NULL))
1335                 tgt_len = strlen(tgt) + 1;
1336
1337 again:
1338         op_data = ll_prep_md_op_data(NULL, dir, NULL, name->name,
1339                                      name->len, 0, opc, NULL);
1340         if (IS_ERR(op_data))
1341                 GOTO(err_exit, err = PTR_ERR(op_data));
1342
1343         if (sbi->ll_flags & LL_SBI_FILE_SECCTX) {
1344                 err = ll_dentry_init_security(dchild, mode, &dchild->d_name,
1345                                               &op_data->op_file_secctx_name,
1346                                               &op_data->op_file_secctx,
1347                                               &op_data->op_file_secctx_size);
1348                 if (err < 0)
1349                         GOTO(err_exit, err);
1350         }
1351
1352         err = md_create(sbi->ll_md_exp, op_data, tgt, tgt_len, mode,
1353                         from_kuid(&init_user_ns, current_fsuid()),
1354                         from_kgid(&init_user_ns, current_fsgid()),
1355                         cfs_curproc_cap_pack(), rdev, &request);
1356 #if LUSTRE_VERSION_CODE < OBD_OCD_VERSION(2, 14, 58, 0)
1357         /*
1358          * server < 2.12.58 doesn't pack default LMV in intent_getattr reply,
1359          * fetch default LMV here.
1360          */
1361         if (unlikely(err == -EREMOTE)) {
1362                 struct ll_inode_info    *lli = ll_i2info(dir);
1363                 struct lmv_user_md      *lum;
1364                 int                     lumsize;
1365                 int                     err2;
1366
1367                 ptlrpc_req_finished(request);
1368                 request = NULL;
1369
1370                 err2 = ll_dir_getstripe(dir, (void **)&lum, &lumsize, &request,
1371                                         OBD_MD_DEFAULT_MEA);
1372                 ll_finish_md_op_data(op_data);
1373                 op_data = NULL;
1374                 if (err2 == 0) {
1375                         struct lustre_md md = { NULL };
1376
1377                         md.body = req_capsule_server_get(&request->rq_pill,
1378                                                          &RMF_MDT_BODY);
1379                         if (!md.body)
1380                                 GOTO(err_exit, err = -EPROTO);
1381
1382                         OBD_ALLOC_PTR(md.default_lmv);
1383                         if (!md.default_lmv)
1384                                 GOTO(err_exit, err = -ENOMEM);
1385
1386                         md.default_lmv->lsm_md_magic = lum->lum_magic;
1387                         md.default_lmv->lsm_md_stripe_count =
1388                                 lum->lum_stripe_count;
1389                         md.default_lmv->lsm_md_master_mdt_index =
1390                                 lum->lum_stripe_offset;
1391                         md.default_lmv->lsm_md_hash_type = lum->lum_hash_type;
1392
1393                         err = ll_update_inode(dir, &md);
1394                         md_free_lustre_md(sbi->ll_md_exp, &md);
1395                         if (err)
1396                                 GOTO(err_exit, err);
1397                 } else if (err2 == -ENODATA && lli->lli_default_lsm_md) {
1398                         /*
1399                          * If there are no default stripe EA on the MDT, but the
1400                          * client has default stripe, then it probably means
1401                          * default stripe EA has just been deleted.
1402                          */
1403                         down_write(&lli->lli_lsm_sem);
1404                         if (lli->lli_default_lsm_md)
1405                                 OBD_FREE_PTR(lli->lli_default_lsm_md);
1406                         lli->lli_default_lsm_md = NULL;
1407                         up_write(&lli->lli_lsm_sem);
1408                 } else {
1409                         GOTO(err_exit, err);
1410                 }
1411
1412                 ptlrpc_req_finished(request);
1413                 request = NULL;
1414                 goto again;
1415         }
1416 #endif
1417
1418         if (err < 0)
1419                 GOTO(err_exit, err);
1420
1421         ll_update_times(request, dir);
1422
1423         CFS_FAIL_TIMEOUT(OBD_FAIL_LLITE_NEWNODE_PAUSE, cfs_fail_val);
1424
1425         err = ll_prep_inode(&inode, request, dchild->d_sb, NULL);
1426         if (err)
1427                 GOTO(err_exit, err);
1428
1429         if (sbi->ll_flags & LL_SBI_FILE_SECCTX) {
1430                 inode_lock(inode);
1431                 /* must be done before d_instantiate, because it calls
1432                  * security_d_instantiate, which means a getxattr if security
1433                  * context is not set yet */
1434                 err = security_inode_notifysecctx(inode,
1435                                                   op_data->op_file_secctx,
1436                                                   op_data->op_file_secctx_size);
1437                 inode_unlock(inode);
1438                 if (err)
1439                         GOTO(err_exit, err);
1440         }
1441
1442         d_instantiate(dchild, inode);
1443
1444         if (!(sbi->ll_flags & LL_SBI_FILE_SECCTX)) {
1445                 err = ll_inode_init_security(dchild, inode, dir);
1446                 if (err)
1447                         GOTO(err_exit, err);
1448         }
1449
1450         EXIT;
1451 err_exit:
1452         if (request != NULL)
1453                 ptlrpc_req_finished(request);
1454
1455         if (!IS_ERR_OR_NULL(op_data))
1456                 ll_finish_md_op_data(op_data);
1457
1458         return err;
1459 }
1460
1461 static int ll_mknod(struct inode *dir, struct dentry *dchild, ll_umode_t mode,
1462                     dev_t rdev)
1463 {
1464         struct qstr *name = &dchild->d_name;
1465         int err;
1466         ENTRY;
1467
1468         CDEBUG(D_VFSTRACE, "VFS Op:name=%.*s, dir="DFID"(%p) mode %o dev %x\n",
1469                name->len, name->name, PFID(ll_inode2fid(dir)), dir,
1470                mode, rdev);
1471
1472         if (!IS_POSIXACL(dir) || !exp_connect_umask(ll_i2mdexp(dir)))
1473                 mode &= ~current_umask();
1474
1475         switch (mode & S_IFMT) {
1476         case 0:
1477                 mode |= S_IFREG; /* for mode = 0 case, fallthrough */
1478         case S_IFREG:
1479         case S_IFCHR:
1480         case S_IFBLK:
1481         case S_IFIFO:
1482         case S_IFSOCK:
1483                 err = ll_new_node(dir, dchild, NULL, mode, old_encode_dev(rdev),
1484                                   LUSTRE_OPC_MKNOD);
1485                 break;
1486         case S_IFDIR:
1487                 err = -EPERM;
1488                 break;
1489         default:
1490                 err = -EINVAL;
1491         }
1492
1493         if (!err)
1494                 ll_stats_ops_tally(ll_i2sbi(dir), LPROC_LL_MKNOD, 1);
1495
1496         RETURN(err);
1497 }
1498
1499 #ifdef HAVE_IOP_ATOMIC_OPEN
1500 /*
1501  * Plain create. Intent create is handled in atomic_open.
1502  */
1503 static int ll_create_nd(struct inode *dir, struct dentry *dentry,
1504                         umode_t mode, bool want_excl)
1505 {
1506         int rc;
1507
1508         CFS_FAIL_TIMEOUT(OBD_FAIL_LLITE_CREATE_FILE_PAUSE, cfs_fail_val);
1509
1510         CDEBUG(D_VFSTRACE, "VFS Op:name=%.*s, dir="DFID"(%p), "
1511                            "flags=%u, excl=%d\n", dentry->d_name.len,
1512                dentry->d_name.name, PFID(ll_inode2fid(dir)),
1513                dir, mode, want_excl);
1514
1515         /* Using mknod(2) to create a regular file is designed to not recognize
1516          * volatile file name, so we use ll_mknod() here. */
1517         rc = ll_mknod(dir, dentry, mode, 0);
1518
1519         ll_stats_ops_tally(ll_i2sbi(dir), LPROC_LL_CREATE, 1);
1520
1521         CDEBUG(D_VFSTRACE, "VFS Op:name=%.*s, unhashed %d\n",
1522                dentry->d_name.len, dentry->d_name.name, d_unhashed(dentry));
1523
1524         return rc;
1525 }
1526 #else /* !HAVE_IOP_ATOMIC_OPEN */
1527 static int ll_create_nd(struct inode *dir, struct dentry *dentry,
1528                         ll_umode_t mode, struct nameidata *nd)
1529 {
1530         struct ll_dentry_data *lld = ll_d2d(dentry);
1531         struct lookup_intent *it = NULL;
1532         int rc;
1533
1534         CFS_FAIL_TIMEOUT(OBD_FAIL_LLITE_CREATE_FILE_PAUSE, cfs_fail_val);
1535
1536         if (lld != NULL)
1537                 it = lld->lld_it;
1538
1539         if (!it) {
1540                 /* LU-8559: use LUSTRE_OPC_CREATE for non atomic open case
1541                  * so that volatile file name is recoginized.
1542                  * Mknod(2), however, is designed to not recognize volatile
1543                  * file name to avoid inode leak under orphan directory until
1544                  * MDT reboot */
1545                 return ll_new_node(dir, dentry, NULL, mode, 0,
1546                                    LUSTRE_OPC_CREATE);
1547         }
1548
1549         lld->lld_it = NULL;
1550
1551         /* Was there an error? Propagate it! */
1552         if (it->it_status) {
1553                 rc = it->it_status;
1554                 goto out;
1555         }
1556
1557         rc = ll_create_it(dir, dentry, it, NULL, 0);
1558         if (nd && (nd->flags & LOOKUP_OPEN) && dentry->d_inode) { /* Open */
1559                 struct file *filp;
1560
1561                 nd->intent.open.file->private_data = it;
1562                 filp = lookup_instantiate_filp(nd, dentry, NULL);
1563                 if (IS_ERR(filp))
1564                         rc = PTR_ERR(filp);
1565         }
1566
1567 out:
1568         ll_intent_release(it);
1569         OBD_FREE(it, sizeof(*it));
1570
1571         if (!rc)
1572                 ll_stats_ops_tally(ll_i2sbi(dir), LPROC_LL_CREATE, 1);
1573
1574         return rc;
1575 }
1576 #endif /* HAVE_IOP_ATOMIC_OPEN */
1577
1578 static int ll_symlink(struct inode *dir, struct dentry *dchild,
1579                       const char *oldpath)
1580 {
1581         struct qstr *name = &dchild->d_name;
1582         int err;
1583         ENTRY;
1584
1585         CDEBUG(D_VFSTRACE, "VFS Op:name=%.*s, dir="DFID"(%p), target=%.*s\n",
1586                name->len, name->name, PFID(ll_inode2fid(dir)),
1587                dir, 3000, oldpath);
1588
1589         err = ll_new_node(dir, dchild, oldpath, S_IFLNK | S_IRWXUGO, 0,
1590                           LUSTRE_OPC_SYMLINK);
1591
1592         if (!err)
1593                 ll_stats_ops_tally(ll_i2sbi(dir), LPROC_LL_SYMLINK, 1);
1594
1595         RETURN(err);
1596 }
1597
1598 static int ll_link(struct dentry *old_dentry, struct inode *dir,
1599                    struct dentry *new_dentry)
1600 {
1601         struct inode *src = old_dentry->d_inode;
1602         struct qstr *name = &new_dentry->d_name;
1603         struct ll_sb_info *sbi = ll_i2sbi(dir);
1604         struct ptlrpc_request *request = NULL;
1605         struct md_op_data *op_data;
1606         int err;
1607
1608         ENTRY;
1609         CDEBUG(D_VFSTRACE, "VFS Op: inode="DFID"(%p), dir="DFID"(%p), "
1610                "target=%.*s\n", PFID(ll_inode2fid(src)), src,
1611                PFID(ll_inode2fid(dir)), dir, name->len, name->name);
1612
1613         op_data = ll_prep_md_op_data(NULL, src, dir, name->name, name->len,
1614                                      0, LUSTRE_OPC_ANY, NULL);
1615         if (IS_ERR(op_data))
1616                 RETURN(PTR_ERR(op_data));
1617
1618         err = md_link(sbi->ll_md_exp, op_data, &request);
1619         ll_finish_md_op_data(op_data);
1620         if (err)
1621                 GOTO(out, err);
1622
1623         ll_update_times(request, dir);
1624         ll_stats_ops_tally(sbi, LPROC_LL_LINK, 1);
1625         EXIT;
1626 out:
1627         ptlrpc_req_finished(request);
1628         RETURN(err);
1629 }
1630
1631 static int ll_mkdir(struct inode *dir, struct dentry *dchild, ll_umode_t mode)
1632 {
1633         struct qstr *name = &dchild->d_name;
1634         int err;
1635         ENTRY;
1636
1637         CDEBUG(D_VFSTRACE, "VFS Op:name=%.*s, dir="DFID"(%p)\n",
1638                name->len, name->name, PFID(ll_inode2fid(dir)), dir);
1639
1640         if (!IS_POSIXACL(dir) || !exp_connect_umask(ll_i2mdexp(dir)))
1641                 mode &= ~current_umask();
1642
1643         mode = (mode & (S_IRWXUGO|S_ISVTX)) | S_IFDIR;
1644
1645         err = ll_new_node(dir, dchild, NULL, mode, 0, LUSTRE_OPC_MKDIR);
1646         if (err == 0)
1647                 ll_stats_ops_tally(ll_i2sbi(dir), LPROC_LL_MKDIR, 1);
1648
1649         RETURN(err);
1650 }
1651
1652 static int ll_rmdir(struct inode *dir, struct dentry *dchild)
1653 {
1654         struct qstr *name = &dchild->d_name;
1655         struct ptlrpc_request *request = NULL;
1656         struct md_op_data *op_data;
1657         int rc;
1658         ENTRY;
1659
1660         CDEBUG(D_VFSTRACE, "VFS Op:name=%.*s, dir="DFID"(%p)\n",
1661                name->len, name->name, PFID(ll_inode2fid(dir)), dir);
1662
1663         if (unlikely(d_mountpoint(dchild)))
1664                 RETURN(-EBUSY);
1665
1666         op_data = ll_prep_md_op_data(NULL, dir, NULL, name->name, name->len,
1667                                      S_IFDIR, LUSTRE_OPC_ANY, NULL);
1668         if (IS_ERR(op_data))
1669                 RETURN(PTR_ERR(op_data));
1670
1671         if (dchild->d_inode != NULL)
1672                 op_data->op_fid3 = *ll_inode2fid(dchild->d_inode);
1673
1674         op_data->op_fid2 = op_data->op_fid3;
1675         rc = md_unlink(ll_i2sbi(dir)->ll_md_exp, op_data, &request);
1676         ll_finish_md_op_data(op_data);
1677         if (rc == 0) {
1678                 ll_update_times(request, dir);
1679                 ll_stats_ops_tally(ll_i2sbi(dir), LPROC_LL_RMDIR, 1);
1680         }
1681
1682         ptlrpc_req_finished(request);
1683         RETURN(rc);
1684 }
1685
1686 /**
1687  * Remove dir entry
1688  **/
1689 int ll_rmdir_entry(struct inode *dir, char *name, int namelen)
1690 {
1691         struct ptlrpc_request *request = NULL;
1692         struct md_op_data *op_data;
1693         int rc;
1694         ENTRY;
1695
1696         CDEBUG(D_VFSTRACE, "VFS Op:name=%.*s, dir="DFID"(%p)\n",
1697                namelen, name, PFID(ll_inode2fid(dir)), dir);
1698
1699         op_data = ll_prep_md_op_data(NULL, dir, NULL, name, strlen(name),
1700                                      S_IFDIR, LUSTRE_OPC_ANY, NULL);
1701         if (IS_ERR(op_data))
1702                 RETURN(PTR_ERR(op_data));
1703         op_data->op_cli_flags |= CLI_RM_ENTRY;
1704         rc = md_unlink(ll_i2sbi(dir)->ll_md_exp, op_data, &request);
1705         ll_finish_md_op_data(op_data);
1706         if (rc == 0) {
1707                 ll_update_times(request, dir);
1708                 ll_stats_ops_tally(ll_i2sbi(dir), LPROC_LL_RMDIR, 1);
1709         }
1710
1711         ptlrpc_req_finished(request);
1712         RETURN(rc);
1713 }
1714
1715 static int ll_unlink(struct inode *dir, struct dentry *dchild)
1716 {
1717         struct qstr *name = &dchild->d_name;
1718         struct ptlrpc_request *request = NULL;
1719         struct md_op_data *op_data;
1720         struct mdt_body *body;
1721         int rc;
1722         ENTRY;
1723         CDEBUG(D_VFSTRACE, "VFS Op:name=%.*s, dir="DFID"(%p)\n",
1724                name->len, name->name, PFID(ll_inode2fid(dir)), dir);
1725
1726         /*
1727          * XXX: unlink bind mountpoint maybe call to here,
1728          * just check it as vfs_unlink does.
1729          */
1730         if (unlikely(d_mountpoint(dchild)))
1731                 RETURN(-EBUSY);
1732
1733         op_data = ll_prep_md_op_data(NULL, dir, NULL, name->name, name->len, 0,
1734                                      LUSTRE_OPC_ANY, NULL);
1735         if (IS_ERR(op_data))
1736                 RETURN(PTR_ERR(op_data));
1737
1738         op_data->op_fid3 = *ll_inode2fid(dchild->d_inode);
1739
1740         op_data->op_fid2 = op_data->op_fid3;
1741         rc = md_unlink(ll_i2sbi(dir)->ll_md_exp, op_data, &request);
1742         ll_finish_md_op_data(op_data);
1743         if (rc)
1744                 GOTO(out, rc);
1745
1746         /*
1747          * The server puts attributes in on the last unlink, use them to update
1748          * the link count so the inode can be freed immediately.
1749          */
1750         body = req_capsule_server_get(&request->rq_pill, &RMF_MDT_BODY);
1751         if (body->mbo_valid & OBD_MD_FLNLINK)
1752                 set_nlink(dchild->d_inode, body->mbo_nlink);
1753
1754         ll_update_times(request, dir);
1755         ll_stats_ops_tally(ll_i2sbi(dir), LPROC_LL_UNLINK, 1);
1756
1757 out:
1758         ptlrpc_req_finished(request);
1759         RETURN(rc);
1760 }
1761
1762 static int ll_rename(struct inode *src, struct dentry *src_dchild,
1763                      struct inode *tgt, struct dentry *tgt_dchild
1764 #ifdef HAVE_IOPS_RENAME_WITH_FLAGS
1765                      , unsigned int flags
1766 #endif
1767                      )
1768 {
1769         struct qstr *src_name = &src_dchild->d_name;
1770         struct qstr *tgt_name = &tgt_dchild->d_name;
1771         struct ptlrpc_request *request = NULL;
1772         struct ll_sb_info *sbi = ll_i2sbi(src);
1773         struct md_op_data *op_data;
1774         int err;
1775         ENTRY;
1776
1777 #ifdef HAVE_IOPS_RENAME_WITH_FLAGS
1778         if (flags)
1779                 return -EINVAL;
1780 #endif
1781
1782         CDEBUG(D_VFSTRACE, "VFS Op:oldname=%.*s, src_dir="DFID
1783                "(%p), newname=%.*s, tgt_dir="DFID"(%p)\n",
1784                src_name->len, src_name->name,
1785                PFID(ll_inode2fid(src)), src, tgt_name->len,
1786                tgt_name->name, PFID(ll_inode2fid(tgt)), tgt);
1787
1788         if (unlikely(d_mountpoint(src_dchild) || d_mountpoint(tgt_dchild)))
1789                 RETURN(-EBUSY);
1790
1791         op_data = ll_prep_md_op_data(NULL, src, tgt, NULL, 0, 0,
1792                                      LUSTRE_OPC_ANY, NULL);
1793         if (IS_ERR(op_data))
1794                 RETURN(PTR_ERR(op_data));
1795
1796         if (src_dchild->d_inode != NULL)
1797                 op_data->op_fid3 = *ll_inode2fid(src_dchild->d_inode);
1798
1799         if (tgt_dchild->d_inode != NULL)
1800                 op_data->op_fid4 = *ll_inode2fid(tgt_dchild->d_inode);
1801
1802         err = md_rename(sbi->ll_md_exp, op_data,
1803                         src_name->name, src_name->len,
1804                         tgt_name->name, tgt_name->len, &request);
1805         ll_finish_md_op_data(op_data);
1806         if (!err) {
1807                 ll_update_times(request, src);
1808                 ll_update_times(request, tgt);
1809                 ll_stats_ops_tally(sbi, LPROC_LL_RENAME, 1);
1810         }
1811
1812         ptlrpc_req_finished(request);
1813
1814         if (err == 0)
1815                 d_move(src_dchild, tgt_dchild);
1816
1817         RETURN(err);
1818 }
1819
1820 const struct inode_operations ll_dir_inode_operations = {
1821         .mknod          = ll_mknod,
1822 #ifdef HAVE_IOP_ATOMIC_OPEN
1823         .atomic_open    = ll_atomic_open,
1824 #endif
1825         .lookup         = ll_lookup_nd,
1826         .create         = ll_create_nd,
1827         /* We need all these non-raw things for NFSD, to not patch it. */
1828         .unlink         = ll_unlink,
1829         .mkdir          = ll_mkdir,
1830         .rmdir          = ll_rmdir,
1831         .symlink        = ll_symlink,
1832         .link           = ll_link,
1833         .rename         = ll_rename,
1834         .setattr        = ll_setattr,
1835         .getattr        = ll_getattr,
1836         .permission     = ll_inode_permission,
1837 #ifdef HAVE_IOP_XATTR
1838         .setxattr       = ll_setxattr,
1839         .getxattr       = ll_getxattr,
1840         .removexattr    = ll_removexattr,
1841 #endif
1842         .listxattr      = ll_listxattr,
1843 #ifdef HAVE_IOP_GET_ACL
1844         .get_acl        = ll_get_acl,
1845 #endif
1846 #ifdef HAVE_IOP_SET_ACL
1847         .set_acl        = ll_set_acl,
1848 #endif
1849 };
1850
1851 const struct inode_operations ll_special_inode_operations = {
1852         .setattr        = ll_setattr,
1853         .getattr        = ll_getattr,
1854         .permission     = ll_inode_permission,
1855 #ifdef HAVE_IOP_XATTR
1856         .setxattr       = ll_setxattr,
1857         .getxattr       = ll_getxattr,
1858         .removexattr    = ll_removexattr,
1859 #endif
1860         .listxattr      = ll_listxattr,
1861 #ifdef HAVE_IOP_GET_ACL
1862         .get_acl        = ll_get_acl,
1863 #endif
1864 #ifdef HAVE_IOP_SET_ACL
1865         .set_acl        = ll_set_acl,
1866 #endif
1867 };