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LU-2675 obd: decruft md_enqueue() and md_intent_lock()
[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->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->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->valid & OBD_MD_FLID))) {
101                 CERROR("MDS body missing FID\n");
102                 return -EINVAL;
103         }
104
105         lli->lli_fid = body->fid1;
106         if (unlikely(!(body->valid & OBD_MD_FLTYPE))) {
107                 CERROR("Can not initialize inode "DFID" without object type: "
108                        "valid = "LPX64"\n", PFID(&lli->lli_fid), body->valid);
109                 return -EINVAL;
110         }
111
112         inode->i_mode = (inode->i_mode & ~S_IFMT) | (body->mode & S_IFMT);
113         if (unlikely(inode->i_mode == 0)) {
114                 CERROR("Invalid inode "DFID" type\n", PFID(&lli->lli_fid));
115                 return -EINVAL;
116         }
117
118         ll_lli_init(lli);
119
120         return 0;
121 }
122
123
124 /**
125  * Get an inode by inode number(@hash), which is already instantiated by
126  * the intent lookup).
127  */
128 struct inode *ll_iget(struct super_block *sb, ino_t hash,
129                       struct lustre_md *md)
130 {
131         struct inode    *inode;
132         int             rc = 0;
133
134         ENTRY;
135
136         LASSERT(hash != 0);
137         inode = iget5_locked(sb, hash, ll_test_inode, ll_set_inode, md);
138         if (inode == NULL)
139                 RETURN(ERR_PTR(-ENOMEM));
140
141         if (inode->i_state & I_NEW) {
142                 rc = ll_read_inode2(inode, md);
143                 if (rc == 0 && S_ISREG(inode->i_mode) &&
144                     ll_i2info(inode)->lli_clob == NULL) {
145                         CDEBUG(D_INODE, "%s: apply lsm %p to inode "DFID"\n",
146                                 ll_get_fsname(sb, NULL, 0), md->lsm,
147                                 PFID(ll_inode2fid(inode)));
148                         rc = cl_file_inode_init(inode, md);
149                 }
150                 if (rc != 0) {
151                         make_bad_inode(inode);
152                         unlock_new_inode(inode);
153                         iput(inode);
154                         inode = ERR_PTR(rc);
155                 } else {
156                         unlock_new_inode(inode);
157                 }
158         } else if (!(inode->i_state & (I_FREEING | I_CLEAR))) {
159                 rc = ll_update_inode(inode, md);
160                 CDEBUG(D_VFSTRACE, "got inode: "DFID"(%p): rc = %d\n",
161                        PFID(&md->body->fid1), inode, rc);
162                 if (rc != 0) {
163                         make_bad_inode(inode);
164                         iput(inode);
165                         inode = ERR_PTR(rc);
166                 }
167         }
168
169         RETURN(inode);
170 }
171
172 static void ll_invalidate_negative_children(struct inode *dir)
173 {
174         struct dentry *dentry, *tmp_subdir;
175         DECLARE_LL_D_HLIST_NODE_PTR(p);
176
177         ll_lock_dcache(dir);
178         ll_d_hlist_for_each_entry(dentry, p, &dir->i_dentry, d_alias) {
179                 spin_lock(&dentry->d_lock);
180                 if (!list_empty(&dentry->d_subdirs)) {
181                         struct dentry *child;
182
183                         list_for_each_entry_safe(child, tmp_subdir,
184                                                  &dentry->d_subdirs,
185                                                  d_u.d_child) {
186                                 if (child->d_inode == NULL)
187                                         d_lustre_invalidate(child, 1);
188                         }
189                 }
190                 spin_unlock(&dentry->d_lock);
191         }
192         ll_unlock_dcache(dir);
193 }
194
195 int ll_test_inode_by_fid(struct inode *inode, void *opaque)
196 {
197         return lu_fid_eq(&ll_i2info(inode)->lli_fid, opaque);
198 }
199
200 int ll_md_blocking_ast(struct ldlm_lock *lock, struct ldlm_lock_desc *desc,
201                        void *data, int flag)
202 {
203         struct lustre_handle lockh;
204         int rc;
205         ENTRY;
206
207         switch (flag) {
208         case LDLM_CB_BLOCKING:
209                 ldlm_lock2handle(lock, &lockh);
210                 rc = ldlm_cli_cancel(&lockh, LCF_ASYNC);
211                 if (rc < 0) {
212                         CDEBUG(D_INODE, "ldlm_cli_cancel: rc = %d\n", rc);
213                         RETURN(rc);
214                 }
215                 break;
216         case LDLM_CB_CANCELING: {
217                 struct inode *inode = ll_inode_from_resource_lock(lock);
218                 __u64 bits = lock->l_policy_data.l_inodebits.bits;
219
220                 /* Inode is set to lock->l_resource->lr_lvb_inode
221                  * for mdc - bug 24555 */
222                 LASSERT(lock->l_ast_data == NULL);
223
224                 if (inode == NULL)
225                         break;
226
227                 /* Invalidate all dentries associated with this inode */
228                 LASSERT(ldlm_is_canceling(lock));
229
230                 if (!fid_res_name_eq(ll_inode2fid(inode),
231                                      &lock->l_resource->lr_name)) {
232                         LDLM_ERROR(lock, "data mismatch with object "DFID"(%p)",
233                                    PFID(ll_inode2fid(inode)), inode);
234                         LBUG();
235                 }
236
237                 if (bits & MDS_INODELOCK_XATTR) {
238                         ll_xattr_cache_destroy(inode);
239                         bits &= ~MDS_INODELOCK_XATTR;
240                 }
241
242                 /* For OPEN locks we differentiate between lock modes
243                  * LCK_CR, LCK_CW, LCK_PR - bug 22891 */
244                 if (bits & MDS_INODELOCK_OPEN)
245                         ll_have_md_lock(inode, &bits, lock->l_req_mode);
246
247                 if (bits & MDS_INODELOCK_OPEN) {
248                         fmode_t fmode;
249
250                         switch (lock->l_req_mode) {
251                         case LCK_CW:
252                                 fmode = FMODE_WRITE;
253                                 break;
254                         case LCK_PR:
255                                 fmode = FMODE_EXEC;
256                                 break;
257                         case LCK_CR:
258                                 fmode = FMODE_READ;
259                                 break;
260                         default:
261                                 LDLM_ERROR(lock, "bad lock mode for OPEN lock");
262                                 LBUG();
263                         }
264
265                         ll_md_real_close(inode, fmode);
266
267                         bits &= ~MDS_INODELOCK_OPEN;
268                 }
269
270                 if (bits & (MDS_INODELOCK_LOOKUP | MDS_INODELOCK_UPDATE |
271                             MDS_INODELOCK_LAYOUT | MDS_INODELOCK_PERM))
272                         ll_have_md_lock(inode, &bits, LCK_MINMODE);
273
274                 if (bits & MDS_INODELOCK_LAYOUT) {
275                         struct cl_object_conf conf = {
276                                 .coc_opc = OBJECT_CONF_INVALIDATE,
277                                 .coc_inode = inode,
278                         };
279
280                         rc = ll_layout_conf(inode, &conf);
281                         if (rc < 0)
282                                 CDEBUG(D_INODE, "cannot invalidate layout of "
283                                        DFID": rc = %d\n",
284                                        PFID(ll_inode2fid(inode)), rc);
285                 }
286
287                 if (bits & MDS_INODELOCK_UPDATE) {
288                         struct ll_inode_info *lli = ll_i2info(inode);
289
290                         spin_lock(&lli->lli_lock);
291                         lli->lli_flags &= ~LLIF_MDS_SIZE_LOCK;
292                         spin_unlock(&lli->lli_lock);
293                 }
294
295                 if ((bits & MDS_INODELOCK_UPDATE) && S_ISDIR(inode->i_mode)) {
296                         struct ll_inode_info *lli = ll_i2info(inode);
297
298                         CDEBUG(D_INODE, "invalidating inode "DFID" lli = %p, "
299                                "pfid  = "DFID"\n", PFID(ll_inode2fid(inode)),
300                                lli, PFID(&lli->lli_pfid));
301                         truncate_inode_pages(inode->i_mapping, 0);
302
303                         if (unlikely(!fid_is_zero(&lli->lli_pfid))) {
304                                 struct inode *master_inode = NULL;
305                                 unsigned long hash;
306
307                                 /* This is slave inode, since all of the child
308                                  * dentry is connected on the master inode, so
309                                  * we have to invalidate the negative children
310                                  * on master inode */
311                                 CDEBUG(D_INODE, "Invalidate s"DFID" m"DFID"\n",
312                                        PFID(ll_inode2fid(inode)),
313                                        PFID(&lli->lli_pfid));
314
315                                 hash = cl_fid_build_ino(&lli->lli_pfid,
316                                         ll_need_32bit_api(ll_i2sbi(inode)));
317
318                                 master_inode = ilookup5(inode->i_sb, hash,
319                                                         ll_test_inode_by_fid,
320                                                         (void *)&lli->lli_pfid);
321                                 if (master_inode != NULL &&
322                                         !IS_ERR(master_inode)) {
323                                         ll_invalidate_negative_children(
324                                                                 master_inode);
325                                         iput(master_inode);
326                                 }
327                         } else {
328                                 ll_invalidate_negative_children(inode);
329                         }
330                 }
331
332                 if ((bits & (MDS_INODELOCK_LOOKUP | MDS_INODELOCK_PERM)) &&
333                     inode->i_sb->s_root != NULL &&
334                     inode != inode->i_sb->s_root->d_inode)
335                         ll_invalidate_aliases(inode);
336
337                 iput(inode);
338                 break;
339         }
340         default:
341                 LBUG();
342         }
343
344         RETURN(0);
345 }
346
347 __u32 ll_i2suppgid(struct inode *i)
348 {
349         if (in_group_p(i->i_gid))
350                 return (__u32)from_kgid(&init_user_ns, i->i_gid);
351         else
352                 return (__u32) __kgid_val(INVALID_GID);
353 }
354
355 /* Pack the required supplementary groups into the supplied groups array.
356  * If we don't need to use the groups from the target inode(s) then we
357  * instead pack one or more groups from the user's supplementary group
358  * array in case it might be useful.  Not needed if doing an MDS-side upcall. */
359 void ll_i2gids(__u32 *suppgids, struct inode *i1, struct inode *i2)
360 {
361         LASSERT(i1 != NULL);
362         LASSERT(suppgids != NULL);
363
364         suppgids[0] = ll_i2suppgid(i1);
365
366         if (i2)
367                 suppgids[1] = ll_i2suppgid(i2);
368         else
369                 suppgids[1] = -1;
370 }
371
372 /*
373  * try to reuse three types of dentry:
374  * 1. unhashed alias, this one is unhashed by d_invalidate (but it may be valid
375  *    by concurrent .revalidate).
376  * 2. INVALID alias (common case for no valid ldlm lock held, but this flag may
377  *    be cleared by others calling d_lustre_revalidate).
378  * 3. DISCONNECTED alias.
379  */
380 static struct dentry *ll_find_alias(struct inode *inode, struct dentry *dentry)
381 {
382         struct dentry *alias, *discon_alias, *invalid_alias;
383         DECLARE_LL_D_HLIST_NODE_PTR(p);
384
385         if (ll_d_hlist_empty(&inode->i_dentry))
386                 return NULL;
387
388         discon_alias = invalid_alias = NULL;
389
390         ll_lock_dcache(inode);
391         ll_d_hlist_for_each_entry(alias, p, &inode->i_dentry, d_alias) {
392                 LASSERT(alias != dentry);
393
394                 spin_lock(&alias->d_lock);
395                 if (alias->d_flags & DCACHE_DISCONNECTED)
396                         /* LASSERT(last_discon == NULL); LU-405, bz 20055 */
397                         discon_alias = alias;
398                 else if (alias->d_parent == dentry->d_parent             &&
399                          alias->d_name.hash == dentry->d_name.hash       &&
400                          alias->d_name.len == dentry->d_name.len         &&
401                          memcmp(alias->d_name.name, dentry->d_name.name,
402                                 dentry->d_name.len) == 0)
403                         invalid_alias = alias;
404                 spin_unlock(&alias->d_lock);
405
406                 if (invalid_alias)
407                         break;
408         }
409         alias = invalid_alias ?: discon_alias ?: NULL;
410         if (alias) {
411                 spin_lock(&alias->d_lock);
412                 dget_dlock(alias);
413                 spin_unlock(&alias->d_lock);
414         }
415         ll_unlock_dcache(inode);
416
417         return alias;
418 }
419
420 /*
421  * Similar to d_splice_alias(), but lustre treats invalid alias
422  * similar to DCACHE_DISCONNECTED, and tries to use it anyway.
423  */
424 struct dentry *ll_splice_alias(struct inode *inode, struct dentry *de)
425 {
426         struct dentry *new;
427         int rc;
428
429         if (inode) {
430                 new = ll_find_alias(inode, de);
431                 if (new) {
432                         rc = ll_d_init(new);
433                         if (rc < 0) {
434                                 dput(new);
435                                 return ERR_PTR(rc);
436                         }
437                         d_move(new, de);
438                         iput(inode);
439                         CDEBUG(D_DENTRY,
440                                "Reuse dentry %p inode %p refc %d flags %#x\n",
441                               new, new->d_inode, d_count(new), new->d_flags);
442                         return new;
443                 }
444         }
445         rc = ll_d_init(de);
446         if (rc < 0)
447                 return ERR_PTR(rc);
448         d_add(de, inode);
449         CDEBUG(D_DENTRY, "Add dentry %p inode %p refc %d flags %#x\n",
450                de, de->d_inode, d_count(de), de->d_flags);
451         return de;
452 }
453
454 static int ll_lookup_it_finish(struct ptlrpc_request *request,
455                                struct lookup_intent *it,
456                                struct inode *parent, struct dentry **de)
457 {
458         struct inode             *inode = NULL;
459         __u64                     bits = 0;
460         int                       rc;
461         ENTRY;
462
463         /* NB 1 request reference will be taken away by ll_intent_lock()
464          * when I return */
465         CDEBUG(D_DENTRY, "it %p it_disposition %x\n", it,
466                it->d.lustre.it_disposition);
467         if (!it_disposition(it, DISP_LOOKUP_NEG)) {
468                 rc = ll_prep_inode(&inode, request, (*de)->d_sb, it);
469                 if (rc)
470                         RETURN(rc);
471
472                 ll_set_lock_data(ll_i2sbi(parent)->ll_md_exp, inode, it, &bits);
473
474                 /* We used to query real size from OSTs here, but actually
475                    this is not needed. For stat() calls size would be updated
476                    from subsequent do_revalidate()->ll_inode_revalidate_it() in
477                    2.4 and
478                    vfs_getattr_it->ll_getattr()->ll_inode_revalidate_it() in 2.6
479                    Everybody else who needs correct file size would call
480                    ll_glimpse_size or some equivalent themselves anyway.
481                    Also see bug 7198. */
482         }
483
484         /* Only hash *de if it is unhashed (new dentry).
485          * Atoimc_open may passin hashed dentries for open.
486          */
487         if (d_unhashed(*de)) {
488                 struct dentry *alias;
489
490                 alias = ll_splice_alias(inode, *de);
491                 if (IS_ERR(alias))
492                         RETURN(PTR_ERR(alias));
493                 *de = alias;
494         } else if (!it_disposition(it, DISP_LOOKUP_NEG)  &&
495                    !it_disposition(it, DISP_OPEN_CREATE)) {
496                 /* With DISP_OPEN_CREATE dentry will
497                    instantiated in ll_create_it. */
498                 LASSERT((*de)->d_inode == NULL);
499                 d_instantiate(*de, inode);
500         }
501
502         if (!it_disposition(it, DISP_LOOKUP_NEG)) {
503                 /* we have lookup look - unhide dentry */
504                 if (bits & MDS_INODELOCK_LOOKUP)
505                         d_lustre_revalidate(*de);
506         } else if (!it_disposition(it, DISP_OPEN_CREATE)) {
507                 /* If file created on server, don't depend on parent UPDATE
508                  * lock to unhide it. It is left hidden and next lookup can
509                  * find it in ll_splice_alias.
510                  */
511                 /* Check that parent has UPDATE lock. */
512                 struct lookup_intent parent_it = {
513                                         .it_op = IT_GETATTR,
514                                         .d.lustre.it_lock_handle = 0 };
515
516                 if (md_revalidate_lock(ll_i2mdexp(parent), &parent_it,
517                                        &ll_i2info(parent)->lli_fid, NULL)) {
518                         d_lustre_revalidate(*de);
519                         ll_intent_release(&parent_it);
520                 }
521         }
522
523         RETURN(0);
524 }
525
526 static struct dentry *ll_lookup_it(struct inode *parent, struct dentry *dentry,
527                                    struct lookup_intent *it, int lookup_flags)
528 {
529         struct lookup_intent lookup_it = { .it_op = IT_LOOKUP };
530         struct dentry *save = dentry, *retval;
531         struct ptlrpc_request *req = NULL;
532         struct md_op_data *op_data;
533         __u32 opc;
534         int rc;
535         ENTRY;
536
537         if (dentry->d_name.len > ll_i2sbi(parent)->ll_namelen)
538                 RETURN(ERR_PTR(-ENAMETOOLONG));
539
540         CDEBUG(D_VFSTRACE, "VFS Op:name=%.*s, dir="DFID"(%p), intent=%s\n",
541                dentry->d_name.len, dentry->d_name.name,
542                PFID(ll_inode2fid(parent)), parent, LL_IT2STR(it));
543
544         if (d_mountpoint(dentry))
545                 CERROR("Tell Peter, lookup on mtpt, it %s\n", LL_IT2STR(it));
546
547         if (it == NULL || it->it_op == IT_GETXATTR)
548                 it = &lookup_it;
549
550         if (it->it_op == IT_GETATTR) {
551                 rc = ll_statahead_enter(parent, &dentry, 0);
552                 if (rc == 1) {
553                         if (dentry == save)
554                                 GOTO(out, retval = NULL);
555                         GOTO(out, retval = dentry);
556                 }
557         }
558
559         if (it->it_op & IT_CREAT)
560                 opc = LUSTRE_OPC_CREATE;
561         else
562                 opc = LUSTRE_OPC_ANY;
563
564         op_data = ll_prep_md_op_data(NULL, parent, NULL, dentry->d_name.name,
565                                      dentry->d_name.len, lookup_flags, opc,
566                                      NULL);
567         if (IS_ERR(op_data))
568                 RETURN((void *)op_data);
569
570         /* enforce umask if acl disabled or MDS doesn't support umask */
571         if (!IS_POSIXACL(parent) || !exp_connect_umask(ll_i2mdexp(parent)))
572                 it->it_create_mode &= ~current_umask();
573
574         rc = md_intent_lock(ll_i2mdexp(parent), op_data, it, &req,
575                             &ll_md_blocking_ast, 0);
576         ll_finish_md_op_data(op_data);
577         if (rc < 0)
578                 GOTO(out, retval = ERR_PTR(rc));
579
580         rc = ll_lookup_it_finish(req, it, parent, &dentry);
581         if (rc != 0) {
582                 ll_intent_release(it);
583                 GOTO(out, retval = ERR_PTR(rc));
584         }
585
586         if ((it->it_op & IT_OPEN) && dentry->d_inode &&
587             !S_ISREG(dentry->d_inode->i_mode) &&
588             !S_ISDIR(dentry->d_inode->i_mode)) {
589                 ll_release_openhandle(dentry, it);
590         }
591         ll_lookup_finish_locks(it, dentry);
592
593         if (dentry == save)
594                 GOTO(out, retval = NULL);
595         else
596                 GOTO(out, retval = dentry);
597  out:
598         if (req)
599                 ptlrpc_req_finished(req);
600         if (it->it_op == IT_GETATTR && (retval == NULL || retval == dentry))
601                 ll_statahead_mark(parent, dentry);
602         return retval;
603 }
604
605 #ifdef HAVE_IOP_ATOMIC_OPEN
606 static struct dentry *ll_lookup_nd(struct inode *parent, struct dentry *dentry,
607                                    unsigned int flags)
608 {
609         struct lookup_intent *itp, it = { .it_op = IT_GETATTR };
610         struct dentry *de;
611
612         CDEBUG(D_VFSTRACE, "VFS Op:name=%.*s, dir="DFID"(%p), flags=%u\n",
613                dentry->d_name.len, dentry->d_name.name,
614                PFID(ll_inode2fid(parent)), parent, flags);
615
616         /* Optimize away (CREATE && !OPEN). Let .create handle the race. */
617         if ((flags & LOOKUP_CREATE) && !(flags & LOOKUP_OPEN))
618                 return NULL;
619
620         if (flags & (LOOKUP_PARENT|LOOKUP_OPEN|LOOKUP_CREATE))
621                 itp = NULL;
622         else
623                 itp = &it;
624         de = ll_lookup_it(parent, dentry, itp, 0);
625
626         if (itp != NULL)
627                 ll_intent_release(itp);
628
629         return de;
630 }
631
632 /*
633  * For cached negative dentry and new dentry, handle lookup/create/open
634  * together.
635  */
636 static int ll_atomic_open(struct inode *dir, struct dentry *dentry,
637                           struct file *file, unsigned open_flags,
638                           umode_t mode, int *opened)
639 {
640         struct lookup_intent *it;
641         struct dentry *de;
642         long long lookup_flags = LOOKUP_OPEN;
643         int rc = 0;
644         ENTRY;
645
646         CDEBUG(D_VFSTRACE, "VFS Op:name=%.*s, dir="DFID"(%p), file %p,"
647                            "open_flags %x, mode %x opened %d\n",
648                dentry->d_name.len, dentry->d_name.name,
649                PFID(ll_inode2fid(dir)), dir, file, open_flags, mode, *opened);
650
651         OBD_ALLOC(it, sizeof(*it));
652         if (!it)
653                 RETURN(-ENOMEM);
654
655         it->it_op = IT_OPEN;
656         if (open_flags & O_CREAT) {
657                 it->it_op |= IT_CREAT;
658                 lookup_flags |= LOOKUP_CREATE;
659         }
660         it->it_create_mode = (mode & S_IALLUGO) | S_IFREG;
661         it->it_flags = (open_flags & ~O_ACCMODE) | OPEN_FMODE(open_flags);
662
663         /* Dentry added to dcache tree in ll_lookup_it */
664         de = ll_lookup_it(dir, dentry, it, lookup_flags);
665         if (IS_ERR(de))
666                 rc = PTR_ERR(de);
667         else if (de != NULL)
668                 dentry = de;
669
670         if (!rc) {
671                 if (it_disposition(it, DISP_OPEN_CREATE)) {
672                         /* Dentry instantiated in ll_create_it. */
673                         rc = ll_create_it(dir, dentry, mode, it);
674                         if (rc) {
675                                 /* We dget in ll_splice_alias. */
676                                 if (de != NULL)
677                                         dput(de);
678                                 goto out_release;
679                         }
680
681                         *opened |= FILE_CREATED;
682                 }
683                 if (dentry->d_inode && it_disposition(it, DISP_OPEN_OPEN)) {
684                         /* Open dentry. */
685                         if (S_ISFIFO(dentry->d_inode->i_mode)) {
686                                 /* We cannot call open here as it would
687                                  * deadlock.
688                                  */
689                                 if (it_disposition(it, DISP_ENQ_OPEN_REF))
690                                         ptlrpc_req_finished(
691                                                        (struct ptlrpc_request *)
692                                                           it->d.lustre.it_data);
693                                 rc = finish_no_open(file, de);
694                         } else {
695                                 file->private_data = it;
696                                 rc = finish_open(file, dentry, NULL, opened);
697                                 /* We dget in ll_splice_alias. finish_open takes
698                                  * care of dget for fd open.
699                                  */
700                                 if (de != NULL)
701                                         dput(de);
702                         }
703                 } else {
704                         rc = finish_no_open(file, de);
705                 }
706         }
707
708 out_release:
709         ll_intent_release(it);
710         OBD_FREE(it, sizeof(*it));
711
712         RETURN(rc);
713 }
714
715 #else /* !HAVE_IOP_ATOMIC_OPEN */
716 static struct lookup_intent *
717 ll_convert_intent(struct open_intent *oit, int lookup_flags)
718 {
719         struct lookup_intent *it;
720
721         OBD_ALLOC(it, sizeof(*it));
722         if (!it)
723                 return ERR_PTR(-ENOMEM);
724
725         if (lookup_flags & LOOKUP_OPEN) {
726                 it->it_op = IT_OPEN;
727                 if (lookup_flags & LOOKUP_CREATE)
728                         it->it_op |= IT_CREAT;
729                 it->it_create_mode = (oit->create_mode & S_IALLUGO) | S_IFREG;
730                 it->it_flags = ll_namei_to_lookup_intent_flag(oit->flags);
731         } else {
732                 it->it_op = IT_GETATTR;
733         }
734
735         return it;
736 }
737
738 static struct dentry *ll_lookup_nd(struct inode *parent, struct dentry *dentry,
739                                    struct nameidata *nd)
740 {
741         struct dentry *de;
742         ENTRY;
743
744         if (nd && !(nd->flags & (LOOKUP_CONTINUE|LOOKUP_PARENT))) {
745                 struct lookup_intent *it;
746
747                 if (ll_d2d(dentry) && ll_d2d(dentry)->lld_it) {
748                         it = ll_d2d(dentry)->lld_it;
749                         ll_d2d(dentry)->lld_it = NULL;
750                 } else {
751                         if ((nd->flags & LOOKUP_CREATE) &&
752                             !(nd->flags & LOOKUP_OPEN))
753                                 RETURN(NULL);
754
755                         it = ll_convert_intent(&nd->intent.open, nd->flags);
756                         if (IS_ERR(it))
757                                 RETURN((struct dentry *)it);
758                 }
759
760                 de = ll_lookup_it(parent, dentry, it, nd->flags);
761                 if (de)
762                         dentry = de;
763                 if ((nd->flags & LOOKUP_OPEN) && !IS_ERR(dentry)) { /* Open */
764                         if (dentry->d_inode &&
765                             it_disposition(it, DISP_OPEN_OPEN)) { /* nocreate */
766                                 if (S_ISFIFO(dentry->d_inode->i_mode)) {
767                                         // We cannot call open here as it would
768                                         // deadlock.
769                                         ptlrpc_req_finished(
770                                                        (struct ptlrpc_request *)
771                                                           it->d.lustre.it_data);
772                                 } else {
773                                         struct file *filp;
774
775                                         nd->intent.open.file->private_data = it;
776                                         filp = lookup_instantiate_filp(nd,
777                                                                        dentry,
778                                                                        NULL);
779                                         if (IS_ERR(filp)) {
780                                                 if (de)
781                                                         dput(de);
782                                                 de = (struct dentry *)filp;
783                                         }
784                                 }
785                         } else if (it_disposition(it, DISP_OPEN_CREATE)) {
786                                 // XXX This can only reliably work on assumption
787                                 // that there are NO hashed negative dentries.
788                                 ll_d2d(dentry)->lld_it = it;
789                                 it = NULL; /* Will be freed in ll_create_nd */
790                                 /* We absolutely depend on ll_create_nd to be
791                                  * called to not leak this intent and possible
792                                  * data attached to it */
793                         }
794                 }
795
796                 if (it) {
797                         ll_intent_release(it);
798                         OBD_FREE(it, sizeof(*it));
799                 }
800         } else {
801                 de = ll_lookup_it(parent, dentry, NULL, 0);
802         }
803
804         RETURN(de);
805 }
806 #endif /* HAVE_IOP_ATOMIC_OPEN */
807
808 /* We depend on "mode" being set with the proper file type/umask by now */
809 static struct inode *ll_create_node(struct inode *dir, struct lookup_intent *it)
810 {
811         struct inode *inode = NULL;
812         struct ptlrpc_request *request = NULL;
813         struct ll_sb_info *sbi = ll_i2sbi(dir);
814         int rc;
815         ENTRY;
816
817         LASSERT(it && it->d.lustre.it_disposition);
818
819         LASSERT(it_disposition(it, DISP_ENQ_CREATE_REF));
820         request = it->d.lustre.it_data;
821         it_clear_disposition(it, DISP_ENQ_CREATE_REF);
822         rc = ll_prep_inode(&inode, request, dir->i_sb, it);
823         if (rc)
824                 GOTO(out, inode = ERR_PTR(rc));
825
826         LASSERT(ll_d_hlist_empty(&inode->i_dentry));
827
828         /* We asked for a lock on the directory, but were granted a
829          * lock on the inode.  Since we finally have an inode pointer,
830          * stuff it in the lock. */
831         CDEBUG(D_DLMTRACE, "setting l_ast_data to inode "DFID"(%p)\n",
832                PFID(ll_inode2fid(inode)), inode);
833         ll_set_lock_data(sbi->ll_md_exp, inode, it, NULL);
834         EXIT;
835  out:
836         ptlrpc_req_finished(request);
837         return inode;
838 }
839
840 /*
841  * By the time this is called, we already have created the directory cache
842  * entry for the new file, but it is so far negative - it has no inode.
843  *
844  * We defer creating the OBD object(s) until open, to keep the intent and
845  * non-intent code paths similar, and also because we do not have the MDS
846  * inode number before calling ll_create_node() (which is needed for LOV),
847  * so we would need to do yet another RPC to the MDS to store the LOV EA
848  * data on the MDS.  If needed, we would pass the PACKED lmm as data and
849  * lmm_size in datalen (the MDS still has code which will handle that).
850  *
851  * If the create succeeds, we fill in the inode information
852  * with d_instantiate().
853  */
854 static int ll_create_it(struct inode *dir, struct dentry *dentry, int mode,
855                         struct lookup_intent *it)
856 {
857         struct inode *inode;
858         int rc = 0;
859         ENTRY;
860
861         CDEBUG(D_VFSTRACE, "VFS Op:name=%.*s, dir="DFID"(%p), intent=%s\n",
862                dentry->d_name.len, dentry->d_name.name,
863                PFID(ll_inode2fid(dir)), dir, LL_IT2STR(it));
864
865         rc = it_open_error(DISP_OPEN_CREATE, it);
866         if (rc)
867                 RETURN(rc);
868
869         inode = ll_create_node(dir, it);
870         if (IS_ERR(inode))
871                 RETURN(PTR_ERR(inode));
872
873         d_instantiate(dentry, inode);
874         RETURN(0);
875 }
876
877 void ll_update_times(struct ptlrpc_request *request, struct inode *inode)
878 {
879         struct mdt_body *body = req_capsule_server_get(&request->rq_pill,
880                                                        &RMF_MDT_BODY);
881
882         LASSERT(body);
883         if (body->valid & OBD_MD_FLMTIME &&
884             body->mtime > LTIME_S(inode->i_mtime)) {
885                 CDEBUG(D_INODE, "setting fid "DFID" mtime from %lu to "LPU64
886                                 "\n", PFID(ll_inode2fid(inode)),
887                                 LTIME_S(inode->i_mtime), body->mtime);
888                 LTIME_S(inode->i_mtime) = body->mtime;
889         }
890         if (body->valid & OBD_MD_FLCTIME &&
891             body->ctime > LTIME_S(inode->i_ctime))
892                 LTIME_S(inode->i_ctime) = body->ctime;
893 }
894
895 static int ll_new_node(struct inode *dir, struct qstr *name,
896                        const char *tgt, int mode, int rdev,
897                        struct dentry *dchild, __u32 opc)
898 {
899         struct ptlrpc_request *request = NULL;
900         struct md_op_data *op_data;
901         struct inode *inode = NULL;
902         struct ll_sb_info *sbi = ll_i2sbi(dir);
903         int tgt_len = 0;
904         int err;
905
906         ENTRY;
907         if (unlikely(tgt != NULL))
908                 tgt_len = strlen(tgt) + 1;
909
910         op_data = ll_prep_md_op_data(NULL, dir, NULL, name->name,
911                                      name->len, 0, opc, NULL);
912         if (IS_ERR(op_data))
913                 GOTO(err_exit, err = PTR_ERR(op_data));
914
915         err = md_create(sbi->ll_md_exp, op_data, tgt, tgt_len, mode,
916                         from_kuid(&init_user_ns, current_fsuid()),
917                         from_kgid(&init_user_ns, current_fsgid()),
918                         cfs_curproc_cap_pack(), rdev, &request);
919         ll_finish_md_op_data(op_data);
920         if (err)
921                 GOTO(err_exit, err);
922
923         ll_update_times(request, dir);
924
925         if (dchild) {
926                 err = ll_prep_inode(&inode, request, dchild->d_sb, NULL);
927                 if (err)
928                      GOTO(err_exit, err);
929
930                 d_instantiate(dchild, inode);
931         }
932         EXIT;
933 err_exit:
934         ptlrpc_req_finished(request);
935
936         return err;
937 }
938
939 static int ll_mknod_generic(struct inode *dir, struct qstr *name, int mode,
940                             unsigned rdev, struct dentry *dchild)
941 {
942         int err;
943         ENTRY;
944
945         CDEBUG(D_VFSTRACE, "VFS Op:name=%.*s, dir="DFID"(%p) mode %o dev %x\n",
946                name->len, name->name, PFID(ll_inode2fid(dir)), dir,
947                mode, rdev);
948
949         if (!IS_POSIXACL(dir) || !exp_connect_umask(ll_i2mdexp(dir)))
950                 mode &= ~current_umask();
951
952         switch (mode & S_IFMT) {
953         case 0:
954                 mode |= S_IFREG; /* for mode = 0 case, fallthrough */
955         case S_IFREG:
956         case S_IFCHR:
957         case S_IFBLK:
958         case S_IFIFO:
959         case S_IFSOCK:
960                 err = ll_new_node(dir, name, NULL, mode, rdev, dchild,
961                                   LUSTRE_OPC_MKNOD);
962                 break;
963         case S_IFDIR:
964                 err = -EPERM;
965                 break;
966         default:
967                 err = -EINVAL;
968         }
969
970         if (!err)
971                 ll_stats_ops_tally(ll_i2sbi(dir), LPROC_LL_MKNOD, 1);
972
973         RETURN(err);
974 }
975
976 #ifdef HAVE_IOP_ATOMIC_OPEN
977 /*
978  * Plain create. Intent create is handled in atomic_open.
979  */
980 static int ll_create_nd(struct inode *dir, struct dentry *dentry,
981                         umode_t mode, bool want_excl)
982 {
983         int rc;
984
985         CDEBUG(D_VFSTRACE, "VFS Op:name=%.*s, dir="DFID"(%p), "
986                            "flags=%u, excl=%d\n", dentry->d_name.len,
987                dentry->d_name.name, PFID(ll_inode2fid(dir)),
988                dir, mode, want_excl);
989
990         rc = ll_mknod_generic(dir, &dentry->d_name, mode, 0, dentry);
991
992         ll_stats_ops_tally(ll_i2sbi(dir), LPROC_LL_CREATE, 1);
993
994         CDEBUG(D_VFSTRACE, "VFS Op:name=%.*s, unhashed %d\n",
995                dentry->d_name.len, dentry->d_name.name, d_unhashed(dentry));
996
997         return rc;
998 }
999 #else /* !HAVE_IOP_ATOMIC_OPEN */
1000 static int ll_create_nd(struct inode *dir, struct dentry *dentry,
1001                         ll_umode_t mode, struct nameidata *nd)
1002 {
1003         struct ll_dentry_data *lld = ll_d2d(dentry);
1004         struct lookup_intent *it = NULL;
1005         int rc;
1006
1007         if (lld != NULL)
1008                 it = lld->lld_it;
1009
1010         if (!it)
1011                 return ll_mknod_generic(dir, &dentry->d_name, mode, 0, dentry);
1012
1013         lld->lld_it = NULL;
1014
1015         /* Was there an error? Propagate it! */
1016         if (it->d.lustre.it_status) {
1017                 rc = it->d.lustre.it_status;
1018                 goto out;
1019         }
1020
1021         rc = ll_create_it(dir, dentry, mode, it);
1022         if (nd && (nd->flags & LOOKUP_OPEN) && dentry->d_inode) { /* Open */
1023                 struct file *filp;
1024
1025                 nd->intent.open.file->private_data = it;
1026                 filp = lookup_instantiate_filp(nd, dentry, NULL);
1027                 if (IS_ERR(filp))
1028                         rc = PTR_ERR(filp);
1029         }
1030
1031 out:
1032         ll_intent_release(it);
1033         OBD_FREE(it, sizeof(*it));
1034
1035         if (!rc)
1036                 ll_stats_ops_tally(ll_i2sbi(dir), LPROC_LL_CREATE, 1);
1037
1038         return rc;
1039 }
1040 #endif /* HAVE_IOP_ATOMIC_OPEN */
1041
1042 static int ll_symlink_generic(struct inode *dir, struct qstr *name,
1043                               const char *tgt, struct dentry *dchild)
1044 {
1045         int err;
1046         ENTRY;
1047
1048         CDEBUG(D_VFSTRACE, "VFS Op:name=%.*s, dir="DFID"(%p), target=%.*s\n",
1049                name->len, name->name, PFID(ll_inode2fid(dir)),
1050                dir, 3000, tgt);
1051
1052         err = ll_new_node(dir, name, (char *)tgt, S_IFLNK | S_IRWXUGO,
1053                           0, dchild, LUSTRE_OPC_SYMLINK);
1054
1055         if (!err)
1056                 ll_stats_ops_tally(ll_i2sbi(dir), LPROC_LL_SYMLINK, 1);
1057
1058         RETURN(err);
1059 }
1060
1061 static int ll_link_generic(struct inode *src,  struct inode *dir,
1062                            struct qstr *name, struct dentry *dchild)
1063 {
1064         struct ll_sb_info *sbi = ll_i2sbi(dir);
1065         struct ptlrpc_request *request = NULL;
1066         struct md_op_data *op_data;
1067         int err;
1068
1069         ENTRY;
1070         CDEBUG(D_VFSTRACE, "VFS Op: inode="DFID"(%p), dir="DFID
1071                "(%p), target=%.*s\n", PFID(ll_inode2fid(src)), src,
1072                PFID(ll_inode2fid(dir)), dir, name->len, name->name);
1073
1074         op_data = ll_prep_md_op_data(NULL, src, dir, name->name, name->len,
1075                                      0, LUSTRE_OPC_ANY, NULL);
1076         if (IS_ERR(op_data))
1077                 RETURN(PTR_ERR(op_data));
1078
1079         err = md_link(sbi->ll_md_exp, op_data, &request);
1080         ll_finish_md_op_data(op_data);
1081         if (err)
1082                 GOTO(out, err);
1083
1084         ll_update_times(request, dir);
1085         ll_stats_ops_tally(sbi, LPROC_LL_LINK, 1);
1086         EXIT;
1087 out:
1088         ptlrpc_req_finished(request);
1089         RETURN(err);
1090 }
1091
1092 static int ll_mkdir_generic(struct inode *dir, struct qstr *name,
1093                             int mode, struct dentry *dchild)
1094
1095 {
1096         int err;
1097         ENTRY;
1098
1099         CDEBUG(D_VFSTRACE, "VFS Op:name=%.*s, dir="DFID"(%p)\n",
1100                name->len, name->name, PFID(ll_inode2fid(dir)), dir);
1101
1102         if (!IS_POSIXACL(dir) || !exp_connect_umask(ll_i2mdexp(dir)))
1103                 mode &= ~current_umask();
1104         mode = (mode & (S_IRWXUGO|S_ISVTX)) | S_IFDIR;
1105         err = ll_new_node(dir, name, NULL, mode, 0, dchild, LUSTRE_OPC_MKDIR);
1106
1107         if (!err)
1108                 ll_stats_ops_tally(ll_i2sbi(dir), LPROC_LL_MKDIR, 1);
1109
1110         RETURN(err);
1111 }
1112
1113 static int ll_rmdir_generic(struct inode *dir, struct dentry *dparent,
1114                             struct dentry *dchild, struct qstr *name)
1115 {
1116         struct ptlrpc_request *request = NULL;
1117         struct md_op_data *op_data;
1118         int rc;
1119         ENTRY;
1120
1121         CDEBUG(D_VFSTRACE, "VFS Op:name=%.*s, dir="DFID"(%p)\n",
1122                name->len, name->name, PFID(ll_inode2fid(dir)), dir);
1123
1124         if (unlikely(ll_d_mountpoint(dparent, dchild, name)))
1125                 RETURN(-EBUSY);
1126
1127         op_data = ll_prep_md_op_data(NULL, dir, NULL, name->name, name->len,
1128                                      S_IFDIR, LUSTRE_OPC_ANY, NULL);
1129         if (IS_ERR(op_data))
1130                 RETURN(PTR_ERR(op_data));
1131
1132         if (dchild != NULL && dchild->d_inode != NULL)
1133                 op_data->op_fid3 = *ll_inode2fid(dchild->d_inode);
1134         op_data->op_fid2 = op_data->op_fid3;
1135         rc = md_unlink(ll_i2sbi(dir)->ll_md_exp, op_data, &request);
1136         ll_finish_md_op_data(op_data);
1137         if (rc == 0) {
1138                 ll_update_times(request, dir);
1139                 ll_stats_ops_tally(ll_i2sbi(dir), LPROC_LL_RMDIR, 1);
1140         }
1141
1142         ptlrpc_req_finished(request);
1143         RETURN(rc);
1144 }
1145
1146 /**
1147  * Remove dir entry
1148  **/
1149 int ll_rmdir_entry(struct inode *dir, char *name, int namelen)
1150 {
1151         struct ptlrpc_request *request = NULL;
1152         struct md_op_data *op_data;
1153         int rc;
1154         ENTRY;
1155
1156         CDEBUG(D_VFSTRACE, "VFS Op:name=%.*s, dir="DFID"(%p)\n",
1157                namelen, name, PFID(ll_inode2fid(dir)), dir);
1158
1159         op_data = ll_prep_md_op_data(NULL, dir, NULL, name, strlen(name),
1160                                      S_IFDIR, LUSTRE_OPC_ANY, NULL);
1161         if (IS_ERR(op_data))
1162                 RETURN(PTR_ERR(op_data));
1163         op_data->op_cli_flags |= CLI_RM_ENTRY;
1164         rc = md_unlink(ll_i2sbi(dir)->ll_md_exp, op_data, &request);
1165         ll_finish_md_op_data(op_data);
1166         if (rc == 0) {
1167                 ll_update_times(request, dir);
1168                 ll_stats_ops_tally(ll_i2sbi(dir), LPROC_LL_RMDIR, 1);
1169         }
1170
1171         ptlrpc_req_finished(request);
1172         RETURN(rc);
1173 }
1174
1175 int ll_objects_destroy(struct ptlrpc_request *request, struct inode *dir)
1176 {
1177         struct mdt_body *body;
1178         struct lov_mds_md *eadata;
1179         struct lov_stripe_md *lsm = NULL;
1180         struct obd_trans_info oti = { 0 };
1181         struct obdo *oa;
1182         struct obd_capa *oc = NULL;
1183         int rc;
1184         ENTRY;
1185
1186         /* req is swabbed so this is safe */
1187         body = req_capsule_server_get(&request->rq_pill, &RMF_MDT_BODY);
1188         if (!(body->valid & OBD_MD_FLEASIZE))
1189                 RETURN(0);
1190
1191         if (body->eadatasize == 0) {
1192                 CERROR("OBD_MD_FLEASIZE set but eadatasize zero\n");
1193                 GOTO(out, rc = -EPROTO);
1194         }
1195
1196         /* The MDS sent back the EA because we unlinked the last reference
1197          * to this file. Use this EA to unlink the objects on the OST.
1198          * It's opaque so we don't swab here; we leave it to obd_unpackmd() to
1199          * check it is complete and sensible. */
1200         eadata = req_capsule_server_sized_get(&request->rq_pill, &RMF_MDT_MD,
1201                                               body->eadatasize);
1202         LASSERT(eadata != NULL);
1203
1204         rc = obd_unpackmd(ll_i2dtexp(dir), &lsm, eadata, body->eadatasize);
1205         if (rc < 0) {
1206                 CERROR("obd_unpackmd: %d\n", rc);
1207                 GOTO(out, rc);
1208         }
1209         LASSERT(rc >= sizeof(*lsm));
1210
1211         OBDO_ALLOC(oa);
1212         if (oa == NULL)
1213                 GOTO(out_free_memmd, rc = -ENOMEM);
1214
1215         oa->o_oi = lsm->lsm_oi;
1216         oa->o_mode = body->mode & S_IFMT;
1217         oa->o_valid = OBD_MD_FLID | OBD_MD_FLTYPE | OBD_MD_FLGROUP;
1218
1219         if (body->valid & OBD_MD_FLCOOKIE) {
1220                 oa->o_valid |= OBD_MD_FLCOOKIE;
1221                 oti.oti_logcookies =
1222                         req_capsule_server_sized_get(&request->rq_pill,
1223                                                      &RMF_LOGCOOKIES,
1224                                                    sizeof(struct llog_cookie) *
1225                                                      lsm->lsm_stripe_count);
1226                 if (oti.oti_logcookies == NULL) {
1227                         oa->o_valid &= ~OBD_MD_FLCOOKIE;
1228                         body->valid &= ~OBD_MD_FLCOOKIE;
1229                 }
1230         }
1231
1232         if (body->valid & OBD_MD_FLOSSCAPA) {
1233                 rc = md_unpack_capa(ll_i2mdexp(dir), request, &RMF_CAPA2, &oc);
1234                 if (rc)
1235                         GOTO(out_free_memmd, rc);
1236         }
1237
1238         rc = obd_destroy(NULL, ll_i2dtexp(dir), oa, lsm, &oti,
1239                          ll_i2mdexp(dir), oc);
1240         capa_put(oc);
1241         if (rc)
1242                 CERROR("obd destroy objid "DOSTID" error %d\n",
1243                        POSTID(&lsm->lsm_oi), rc);
1244 out_free_memmd:
1245         obd_free_memmd(ll_i2dtexp(dir), &lsm);
1246         OBDO_FREE(oa);
1247 out:
1248         return rc;
1249 }
1250
1251 /* ll_unlink_generic() doesn't update the inode with the new link count.
1252  * Instead, ll_ddelete() and ll_d_iput() will update it based upon if there
1253  * is any lock existing. They will recycle dentries and inodes based upon locks
1254  * too. b=20433 */
1255 static int ll_unlink_generic(struct inode *dir, struct dentry *dparent,
1256                              struct dentry *dchild, struct qstr *name)
1257 {
1258         struct ptlrpc_request *request = NULL;
1259         struct md_op_data *op_data;
1260         int rc;
1261         ENTRY;
1262         CDEBUG(D_VFSTRACE, "VFS Op:name=%.*s, dir="DFID"(%p)\n",
1263                name->len, name->name, PFID(ll_inode2fid(dir)), dir);
1264
1265         /*
1266          * XXX: unlink bind mountpoint maybe call to here,
1267          * just check it as vfs_unlink does.
1268          */
1269         if (unlikely(ll_d_mountpoint(dparent, dchild, name)))
1270                 RETURN(-EBUSY);
1271
1272         op_data = ll_prep_md_op_data(NULL, dir, NULL, name->name,
1273                                      name->len, 0, LUSTRE_OPC_ANY, NULL);
1274         if (IS_ERR(op_data))
1275                 RETURN(PTR_ERR(op_data));
1276
1277         if (dchild != NULL && dchild->d_inode != NULL)
1278                 op_data->op_fid3 = *ll_inode2fid(dchild->d_inode);
1279
1280         op_data->op_fid2 = op_data->op_fid3;
1281         rc = md_unlink(ll_i2sbi(dir)->ll_md_exp, op_data, &request);
1282         ll_finish_md_op_data(op_data);
1283         if (rc)
1284                 GOTO(out, rc);
1285
1286         ll_update_times(request, dir);
1287         ll_stats_ops_tally(ll_i2sbi(dir), LPROC_LL_UNLINK, 1);
1288
1289         rc = ll_objects_destroy(request, dir);
1290  out:
1291         ptlrpc_req_finished(request);
1292         RETURN(rc);
1293 }
1294
1295 static int ll_rename_generic(struct inode *src, struct dentry *src_dparent,
1296                              struct dentry *src_dchild, struct qstr *src_name,
1297                              struct inode *tgt, struct dentry *tgt_dparent,
1298                              struct dentry *tgt_dchild, struct qstr *tgt_name)
1299 {
1300         struct ptlrpc_request *request = NULL;
1301         struct ll_sb_info *sbi = ll_i2sbi(src);
1302         struct md_op_data *op_data;
1303         int err;
1304         ENTRY;
1305         CDEBUG(D_VFSTRACE, "VFS Op:oldname=%.*s, src_dir="DFID
1306                "(%p), newname=%.*s, tgt_dir="DFID"(%p)\n",
1307                src_name->len, src_name->name,
1308                PFID(ll_inode2fid(src)), src, tgt_name->len,
1309                tgt_name->name, PFID(ll_inode2fid(tgt)), tgt);
1310
1311         if (unlikely(ll_d_mountpoint(src_dparent, src_dchild, src_name) ||
1312             ll_d_mountpoint(tgt_dparent, tgt_dchild, tgt_name)))
1313                 RETURN(-EBUSY);
1314
1315         op_data = ll_prep_md_op_data(NULL, src, tgt, NULL, 0, 0,
1316                                      LUSTRE_OPC_ANY, NULL);
1317         if (IS_ERR(op_data))
1318                 RETURN(PTR_ERR(op_data));
1319
1320         if (src_dchild != NULL && src_dchild->d_inode != NULL)
1321                 op_data->op_fid3 = *ll_inode2fid(src_dchild->d_inode);
1322         if (tgt_dchild != NULL && tgt_dchild->d_inode != NULL)
1323                 op_data->op_fid4 = *ll_inode2fid(tgt_dchild->d_inode);
1324
1325         err = md_rename(sbi->ll_md_exp, op_data,
1326                         src_name->name, src_name->len,
1327                         tgt_name->name, tgt_name->len, &request);
1328         ll_finish_md_op_data(op_data);
1329         if (!err) {
1330                 ll_update_times(request, src);
1331                 ll_update_times(request, tgt);
1332                 ll_stats_ops_tally(sbi, LPROC_LL_RENAME, 1);
1333                 err = ll_objects_destroy(request, src);
1334         }
1335
1336         ptlrpc_req_finished(request);
1337
1338         RETURN(err);
1339 }
1340
1341 static int ll_mknod(struct inode *dir, struct dentry *dchild, ll_umode_t mode,
1342                     dev_t rdev)
1343 {
1344         return ll_mknod_generic(dir, &dchild->d_name, mode,
1345                                 old_encode_dev(rdev), dchild);
1346 }
1347
1348 static int ll_unlink(struct inode * dir, struct dentry *dentry)
1349 {
1350         return ll_unlink_generic(dir, NULL, dentry, &dentry->d_name);
1351 }
1352
1353 static int ll_mkdir(struct inode *dir, struct dentry *dentry, ll_umode_t mode)
1354 {
1355         return ll_mkdir_generic(dir, &dentry->d_name, mode, dentry);
1356 }
1357
1358 static int ll_rmdir(struct inode *dir, struct dentry *dentry)
1359 {
1360         return ll_rmdir_generic(dir, NULL, dentry, &dentry->d_name);
1361 }
1362
1363 static int ll_symlink(struct inode *dir, struct dentry *dentry,
1364                       const char *oldname)
1365 {
1366         return ll_symlink_generic(dir, &dentry->d_name, oldname, dentry);
1367 }
1368
1369 static int ll_link(struct dentry *old_dentry, struct inode *dir,
1370                    struct dentry *new_dentry)
1371 {
1372         return ll_link_generic(old_dentry->d_inode, dir, &new_dentry->d_name,
1373                                new_dentry);
1374 }
1375
1376 static int ll_rename(struct inode *old_dir, struct dentry *old_dentry,
1377                      struct inode *new_dir, struct dentry *new_dentry)
1378 {
1379         int err;
1380         err = ll_rename_generic(old_dir, NULL,
1381                                  old_dentry, &old_dentry->d_name,
1382                                  new_dir, NULL, new_dentry,
1383                                  &new_dentry->d_name);
1384         if (!err)
1385                         d_move(old_dentry, new_dentry);
1386         return err;
1387 }
1388
1389 const struct inode_operations ll_dir_inode_operations = {
1390         .mknod              = ll_mknod,
1391 #ifdef HAVE_IOP_ATOMIC_OPEN
1392         .atomic_open        = ll_atomic_open,
1393 #endif
1394         .lookup             = ll_lookup_nd,
1395         .create             = ll_create_nd,
1396         /* We need all these non-raw things for NFSD, to not patch it. */
1397         .unlink             = ll_unlink,
1398         .mkdir              = ll_mkdir,
1399         .rmdir              = ll_rmdir,
1400         .symlink            = ll_symlink,
1401         .link               = ll_link,
1402         .rename             = ll_rename,
1403         .setattr            = ll_setattr,
1404         .getattr            = ll_getattr,
1405         .permission         = ll_inode_permission,
1406         .setxattr           = ll_setxattr,
1407         .getxattr           = ll_getxattr,
1408         .listxattr          = ll_listxattr,
1409         .removexattr        = ll_removexattr,
1410 #ifdef HAVE_IOP_GET_ACL
1411         .get_acl            = ll_get_acl,
1412 #endif
1413 };
1414
1415 const struct inode_operations ll_special_inode_operations = {
1416         .setattr        = ll_setattr,
1417         .getattr        = ll_getattr,
1418         .permission     = ll_inode_permission,
1419         .setxattr       = ll_setxattr,
1420         .getxattr       = ll_getxattr,
1421         .listxattr      = ll_listxattr,
1422         .removexattr    = ll_removexattr,
1423 #ifdef HAVE_IOP_GET_ACL
1424         .get_acl            = ll_get_acl,
1425 #endif
1426 };