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[fs/lustre-release.git] / lustre / llite / namei.c
1 /*
2  * GPL HEADER START
3  *
4  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
5  *
6  * This program is free software; you can redistribute it and/or modify
7  * it under the terms of the GNU General Public License version 2 only,
8  * as published by the Free Software Foundation.
9  *
10  * This program is distributed in the hope that it will be useful, but
11  * WITHOUT ANY WARRANTY; without even the implied warranty of
12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
13  * General Public License version 2 for more details (a copy is included
14  * in the LICENSE file that accompanied this code).
15  *
16  * You should have received a copy of the GNU General Public License
17  * version 2 along with this program; If not, see
18  * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
19  *
20  * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
21  * CA 95054 USA or visit www.sun.com if you need additional information or
22  * have any questions.
23  *
24  * GPL HEADER END
25  */
26 /*
27  * Copyright (c) 2002, 2010, Oracle and/or its affiliates. All rights reserved.
28  * Use is subject to license terms.
29  *
30  * Copyright (c) 2011, 2013, Intel Corporation.
31  */
32 /*
33  * This file is part of Lustre, http://www.lustre.org/
34  * Lustre is a trademark of Sun Microsystems, Inc.
35  */
36
37 #include <linux/fs.h>
38 #include <linux/sched.h>
39 #include <linux/mm.h>
40 #include <linux/quotaops.h>
41 #include <linux/highmem.h>
42 #include <linux/pagemap.h>
43 #include <linux/security.h>
44
45 #define DEBUG_SUBSYSTEM S_LLITE
46
47 #include <obd_support.h>
48 #include <lustre_fid.h>
49 #include <lustre_lite.h>
50 #include <lustre_dlm.h>
51 #include <lustre_ver.h>
52 #include "llite_internal.h"
53
54 static int ll_create_it(struct inode *, struct dentry *,
55                         int, struct lookup_intent *);
56
57 /*
58  * Check if we have something mounted at the named dchild.
59  * In such a case there would always be dentry present.
60  */
61 static int ll_d_mountpoint(struct dentry *dparent, struct dentry *dchild,
62                            struct qstr *name)
63 {
64         int mounted = 0;
65
66         if (unlikely(dchild)) {
67                 mounted = d_mountpoint(dchild);
68         } else if (dparent) {
69                 dchild = d_lookup(dparent, name);
70                 if (dchild) {
71                         mounted = d_mountpoint(dchild);
72                         dput(dchild);
73                 }
74         }
75         return mounted;
76 }
77
78 int ll_unlock(__u32 mode, struct lustre_handle *lockh)
79 {
80         ENTRY;
81
82         ldlm_lock_decref(lockh, mode);
83
84         RETURN(0);
85 }
86
87
88 /* called from iget5_locked->find_inode() under inode_lock spinlock */
89 static int ll_test_inode(struct inode *inode, void *opaque)
90 {
91         struct ll_inode_info *lli = ll_i2info(inode);
92         struct lustre_md     *md = opaque;
93
94         if (unlikely(!(md->body->valid & OBD_MD_FLID))) {
95                 CERROR("MDS body missing FID\n");
96                 return 0;
97         }
98
99         if (!lu_fid_eq(&lli->lli_fid, &md->body->fid1))
100                 return 0;
101
102         return 1;
103 }
104
105 static int ll_set_inode(struct inode *inode, void *opaque)
106 {
107         struct ll_inode_info *lli = ll_i2info(inode);
108         struct mdt_body *body = ((struct lustre_md *)opaque)->body;
109
110         if (unlikely(!(body->valid & OBD_MD_FLID))) {
111                 CERROR("MDS body missing FID\n");
112                 return -EINVAL;
113         }
114
115         lli->lli_fid = body->fid1;
116         if (unlikely(!(body->valid & OBD_MD_FLTYPE))) {
117                 CERROR("Can not initialize inode "DFID" without object type: "
118                        "valid = "LPX64"\n", PFID(&lli->lli_fid), body->valid);
119                 return -EINVAL;
120         }
121
122         inode->i_mode = (inode->i_mode & ~S_IFMT) | (body->mode & S_IFMT);
123         if (unlikely(inode->i_mode == 0)) {
124                 CERROR("Invalid inode "DFID" type\n", PFID(&lli->lli_fid));
125                 return -EINVAL;
126         }
127
128         ll_lli_init(lli);
129
130         return 0;
131 }
132
133
134 /*
135  * Get an inode by inode number (already instantiated by the intent lookup).
136  * Returns inode or NULL
137  */
138 struct inode *ll_iget(struct super_block *sb, ino_t hash,
139                       struct lustre_md *md)
140 {
141         struct inode         *inode;
142         ENTRY;
143
144         LASSERT(hash != 0);
145         inode = iget5_locked(sb, hash, ll_test_inode, ll_set_inode, md);
146
147         if (inode) {
148                 if (inode->i_state & I_NEW) {
149                         int rc = 0;
150
151                         ll_read_inode2(inode, md);
152                         if (S_ISREG(inode->i_mode) &&
153                             ll_i2info(inode)->lli_clob == NULL) {
154                                 CDEBUG(D_INODE,
155                                         "%s: apply lsm %p to inode "DFID".\n",
156                                         ll_get_fsname(sb, NULL, 0), md->lsm,
157                                         PFID(ll_inode2fid(inode)));
158                                 rc = cl_file_inode_init(inode, md);
159                         }
160                         if (rc != 0) {
161                                 make_bad_inode(inode);
162                                 unlock_new_inode(inode);
163                                 iput(inode);
164                                 inode = ERR_PTR(rc);
165                         } else
166                                 unlock_new_inode(inode);
167                 } else if (!(inode->i_state & (I_FREEING | I_CLEAR)))
168                         ll_update_inode(inode, md);
169                 CDEBUG(D_VFSTRACE, "got inode: %p for "DFID"\n",
170                        inode, PFID(&md->body->fid1));
171         }
172         RETURN(inode);
173 }
174
175 static void ll_invalidate_negative_children(struct inode *dir)
176 {
177         struct dentry *dentry, *tmp_subdir;
178         struct ll_d_hlist_node *p;
179
180         ll_lock_dcache(dir);
181         ll_d_hlist_for_each_entry(dentry, p, &dir->i_dentry, d_alias) {
182                 spin_lock(&dentry->d_lock);
183                 if (!list_empty(&dentry->d_subdirs)) {
184                         struct dentry *child;
185
186                         list_for_each_entry_safe(child, tmp_subdir,
187                                                  &dentry->d_subdirs,
188                                                  d_u.d_child) {
189                                 if (child->d_inode == NULL)
190                                         d_lustre_invalidate(child);
191                         }
192                 }
193                 spin_unlock(&dentry->d_lock);
194         }
195         ll_unlock_dcache(dir);
196 }
197
198 int ll_md_blocking_ast(struct ldlm_lock *lock, struct ldlm_lock_desc *desc,
199                        void *data, int flag)
200 {
201         int rc;
202         struct lustre_handle lockh;
203         ENTRY;
204
205         switch (flag) {
206         case LDLM_CB_BLOCKING:
207                 ldlm_lock2handle(lock, &lockh);
208                 rc = ldlm_cli_cancel(&lockh, LCF_ASYNC);
209                 if (rc < 0) {
210                         CDEBUG(D_INODE, "ldlm_cli_cancel: %d\n", rc);
211                         RETURN(rc);
212                 }
213                 break;
214         case LDLM_CB_CANCELING: {
215                 struct inode *inode = ll_inode_from_resource_lock(lock);
216                 struct ll_inode_info *lli;
217                 __u64 bits = lock->l_policy_data.l_inodebits.bits;
218                 struct lu_fid *fid;
219                 ldlm_mode_t mode = lock->l_req_mode;
220
221                 /* Inode is set to lock->l_resource->lr_lvb_inode
222                  * for mdc - bug 24555 */
223                 LASSERT(lock->l_ast_data == NULL);
224
225                 /* Invalidate all dentries associated with this inode */
226                 if (inode == NULL)
227                         break;
228
229                 LASSERT(lock->l_flags & LDLM_FL_CANCELING);
230                 /* For OPEN locks we differentiate between lock modes
231                  * LCK_CR, LCK_CW, LCK_PR - bug 22891 */
232                 if (bits & (MDS_INODELOCK_LOOKUP | MDS_INODELOCK_UPDATE |
233                             MDS_INODELOCK_LAYOUT | MDS_INODELOCK_PERM))
234                         ll_have_md_lock(inode, &bits, LCK_MINMODE);
235
236                 if (bits & MDS_INODELOCK_OPEN)
237                         ll_have_md_lock(inode, &bits, mode);
238
239                 fid = ll_inode2fid(inode);
240                 if (lock->l_resource->lr_name.name[0] != fid_seq(fid) ||
241                     lock->l_resource->lr_name.name[1] != fid_oid(fid) ||
242                     lock->l_resource->lr_name.name[2] != fid_ver(fid)) {
243                         LDLM_ERROR(lock, "data mismatch with object "
244                                    DFID" (%p)", PFID(fid), inode);
245                 }
246
247                 if (bits & MDS_INODELOCK_OPEN) {
248                         int flags = 0;
249                         switch (lock->l_req_mode) {
250                         case LCK_CW:
251                                 flags = FMODE_WRITE;
252                                 break;
253                         case LCK_PR:
254                                 flags = FMODE_EXEC;
255                                 break;
256                         case LCK_CR:
257                                 flags = FMODE_READ;
258                                 break;
259                         default:
260                                 CERROR("Unexpected lock mode for OPEN lock "
261                                        "%d, inode %ld\n", lock->l_req_mode,
262                                        inode->i_ino);
263                         }
264                         ll_md_real_close(inode, flags);
265                 }
266
267                 lli = ll_i2info(inode);
268                 if (bits & MDS_INODELOCK_LAYOUT) {
269                         struct cl_object_conf conf = { { 0 } };
270
271                         conf.coc_opc = OBJECT_CONF_INVALIDATE;
272                         conf.coc_inode = inode;
273                         rc = ll_layout_conf(inode, &conf);
274                         if (rc)
275                                 CDEBUG(D_INODE, "invaliding layout %d.\n", rc);
276                 }
277
278                 if (bits & MDS_INODELOCK_UPDATE)
279                         lli->lli_flags &= ~LLIF_MDS_SIZE_LOCK;
280
281                 if (S_ISDIR(inode->i_mode) &&
282                      (bits & MDS_INODELOCK_UPDATE)) {
283                         CDEBUG(D_INODE, "invalidating inode %lu\n",
284                                inode->i_ino);
285                         truncate_inode_pages(inode->i_mapping, 0);
286                         ll_invalidate_negative_children(inode);
287                 }
288
289                 if (inode->i_sb->s_root &&
290                     inode != inode->i_sb->s_root->d_inode &&
291                     (bits & (MDS_INODELOCK_LOOKUP | MDS_INODELOCK_PERM)))
292                         ll_invalidate_aliases(inode);
293                 iput(inode);
294                 break;
295         }
296         default:
297                 LBUG();
298         }
299
300         RETURN(0);
301 }
302
303 __u32 ll_i2suppgid(struct inode *i)
304 {
305         if (cfs_curproc_is_in_groups(i->i_gid))
306                 return (__u32)i->i_gid;
307         else
308                 return (__u32)(-1);
309 }
310
311 /* Pack the required supplementary groups into the supplied groups array.
312  * If we don't need to use the groups from the target inode(s) then we
313  * instead pack one or more groups from the user's supplementary group
314  * array in case it might be useful.  Not needed if doing an MDS-side upcall. */
315 void ll_i2gids(__u32 *suppgids, struct inode *i1, struct inode *i2)
316 {
317 #if 0
318         int i;
319 #endif
320
321         LASSERT(i1 != NULL);
322         LASSERT(suppgids != NULL);
323
324         suppgids[0] = ll_i2suppgid(i1);
325
326         if (i2)
327                 suppgids[1] = ll_i2suppgid(i2);
328                 else
329                         suppgids[1] = -1;
330
331 #if 0
332         for (i = 0; i < current_ngroups; i++) {
333                 if (suppgids[0] == -1) {
334                         if (current_groups[i] != suppgids[1])
335                                 suppgids[0] = current_groups[i];
336                         continue;
337                 }
338                 if (suppgids[1] == -1) {
339                         if (current_groups[i] != suppgids[0])
340                                 suppgids[1] = current_groups[i];
341                         continue;
342                 }
343                 break;
344         }
345 #endif
346 }
347
348 /*
349  * try to reuse three types of dentry:
350  * 1. unhashed alias, this one is unhashed by d_invalidate (but it may be valid
351  *    by concurrent .revalidate).
352  * 2. INVALID alias (common case for no valid ldlm lock held, but this flag may
353  *    be cleared by others calling d_lustre_revalidate).
354  * 3. DISCONNECTED alias.
355  */
356 static struct dentry *ll_find_alias(struct inode *inode, struct dentry *dentry)
357 {
358         struct dentry *alias, *discon_alias, *invalid_alias;
359         struct ll_d_hlist_node *p;
360
361         if (ll_d_hlist_empty(&inode->i_dentry))
362                 return NULL;
363
364         discon_alias = invalid_alias = NULL;
365
366         ll_lock_dcache(inode);
367         ll_d_hlist_for_each_entry(alias, p, &inode->i_dentry, d_alias) {
368                 LASSERT(alias != dentry);
369
370                 spin_lock(&alias->d_lock);
371                 if (alias->d_flags & DCACHE_DISCONNECTED)
372                         /* LASSERT(last_discon == NULL); LU-405, bz 20055 */
373                         discon_alias = alias;
374                 else if (alias->d_parent == dentry->d_parent             &&
375                          alias->d_name.hash == dentry->d_name.hash       &&
376                          alias->d_name.len == dentry->d_name.len         &&
377                          memcmp(alias->d_name.name, dentry->d_name.name,
378                                 dentry->d_name.len) == 0)
379                         invalid_alias = alias;
380                 spin_unlock(&alias->d_lock);
381
382                 if (invalid_alias)
383                         break;
384         }
385         alias = invalid_alias ?: discon_alias ?: NULL;
386         if (alias) {
387                 spin_lock(&alias->d_lock);
388                 dget_dlock(alias);
389                 spin_unlock(&alias->d_lock);
390         }
391         ll_unlock_dcache(inode);
392
393         return alias;
394 }
395
396 /*
397  * Similar to d_splice_alias(), but lustre treats invalid alias
398  * similar to DCACHE_DISCONNECTED, and tries to use it anyway.
399  */
400 struct dentry *ll_splice_alias(struct inode *inode, struct dentry *de)
401 {
402         struct dentry *new;
403
404         if (inode) {
405                 new = ll_find_alias(inode, de);
406                 if (new) {
407                         ll_dops_init(new, 1, 1);
408                         d_move(new, de);
409                         iput(inode);
410                         CDEBUG(D_DENTRY,
411                                "Reuse dentry %p inode %p refc %d flags %#x\n",
412                               new, new->d_inode, d_refcount(new), new->d_flags);
413                         return new;
414                 }
415         }
416         ll_dops_init(de, 1, 1);
417         __d_lustre_invalidate(de);
418         d_add(de, inode);
419         CDEBUG(D_DENTRY, "Add dentry %p inode %p refc %d flags %#x\n",
420                de, de->d_inode, d_refcount(de), de->d_flags);
421         return de;
422 }
423
424 int ll_lookup_it_finish(struct ptlrpc_request *request,
425                         struct lookup_intent *it, void *data)
426 {
427         struct it_cb_data *icbd = data;
428         struct dentry **de = icbd->icbd_childp;
429         struct inode *parent = icbd->icbd_parent;
430         struct inode *inode = NULL;
431         __u64 bits = 0;
432         int rc;
433         ENTRY;
434
435         /* NB 1 request reference will be taken away by ll_intent_lock()
436          * when I return */
437         CDEBUG(D_DENTRY, "it %p it_disposition %x\n", it,
438                it->d.lustre.it_disposition);
439         if (!it_disposition(it, DISP_LOOKUP_NEG)) {
440                 rc = ll_prep_inode(&inode, request, (*de)->d_sb, it);
441                 if (rc)
442                         RETURN(rc);
443
444                 ll_set_lock_data(ll_i2sbi(parent)->ll_md_exp, inode, it, &bits);
445
446                 /* We used to query real size from OSTs here, but actually
447                    this is not needed. For stat() calls size would be updated
448                    from subsequent do_revalidate()->ll_inode_revalidate_it() in
449                    2.4 and
450                    vfs_getattr_it->ll_getattr()->ll_inode_revalidate_it() in 2.6
451                    Everybody else who needs correct file size would call
452                    ll_glimpse_size or some equivalent themselves anyway.
453                    Also see bug 7198. */
454         }
455
456         /* Only hash *de if it is unhashed (new dentry).
457          * Atoimc_open may passin hashed dentries for open.
458          */
459         if (d_unhashed(*de))
460                 *de = ll_splice_alias(inode, *de);
461
462         if (!it_disposition(it, DISP_LOOKUP_NEG)) {
463                 /* we have lookup look - unhide dentry */
464                 if (bits & MDS_INODELOCK_LOOKUP)
465                         d_lustre_revalidate(*de);
466         } else if (!it_disposition(it, DISP_OPEN_CREATE)) {
467                 /* If file created on server, don't depend on parent UPDATE
468                  * lock to unhide it. It is left hidden and next lookup can
469                  * find it in ll_splice_alias.
470                  */
471                 /* Check that parent has UPDATE lock. */
472                 struct lookup_intent parent_it = {
473                                         .it_op = IT_GETATTR,
474                                         .d.lustre.it_lock_handle = 0 };
475
476                 if (md_revalidate_lock(ll_i2mdexp(parent), &parent_it,
477                                        &ll_i2info(parent)->lli_fid, NULL)) {
478                         d_lustre_revalidate(*de);
479                         ll_intent_release(&parent_it);
480                 }
481         }
482
483         RETURN(0);
484 }
485
486 static struct dentry *ll_lookup_it(struct inode *parent, struct dentry *dentry,
487                                    struct lookup_intent *it, int lookup_flags)
488 {
489         struct lookup_intent lookup_it = { .it_op = IT_LOOKUP };
490         struct dentry *save = dentry, *retval;
491         struct ptlrpc_request *req = NULL;
492         struct md_op_data *op_data;
493         struct it_cb_data icbd;
494         __u32 opc;
495         int rc;
496         ENTRY;
497
498         if (dentry->d_name.len > ll_i2sbi(parent)->ll_namelen)
499                 RETURN(ERR_PTR(-ENAMETOOLONG));
500
501         CDEBUG(D_VFSTRACE, "VFS Op:name=%.*s,dir=%lu/%u(%p),intent=%s\n",
502                dentry->d_name.len, dentry->d_name.name, parent->i_ino,
503                parent->i_generation, parent, LL_IT2STR(it));
504
505         if (d_mountpoint(dentry))
506                 CERROR("Tell Peter, lookup on mtpt, it %s\n", LL_IT2STR(it));
507
508         ll_frob_intent(&it, &lookup_it);
509
510         /* As do_lookup is called before follow_mount, root dentry may be left
511          * not valid, revalidate it here. */
512         if (parent->i_sb->s_root && (parent->i_sb->s_root->d_inode == parent) &&
513             (it->it_op & (IT_OPEN | IT_CREAT))) {
514                 rc = ll_inode_revalidate_it(parent->i_sb->s_root, it,
515                                             MDS_INODELOCK_LOOKUP);
516                 if (rc)
517                         RETURN(ERR_PTR(rc));
518         }
519
520         if (it->it_op == IT_GETATTR) {
521                 rc = ll_statahead_enter(parent, &dentry, 0);
522                 if (rc == 1) {
523                         if (dentry == save)
524                                 GOTO(out, retval = NULL);
525                         GOTO(out, retval = dentry);
526                 }
527         }
528
529         icbd.icbd_childp = &dentry;
530         icbd.icbd_parent = parent;
531
532         if (it->it_op & IT_CREAT ||
533             (it->it_op & IT_OPEN && it->it_create_mode & O_CREAT))
534                 opc = LUSTRE_OPC_CREATE;
535         else
536                 opc = LUSTRE_OPC_ANY;
537
538         op_data = ll_prep_md_op_data(NULL, parent, NULL, dentry->d_name.name,
539                                      dentry->d_name.len, lookup_flags, opc,
540                                      NULL);
541         if (IS_ERR(op_data))
542                 RETURN((void *)op_data);
543
544         /* enforce umask if acl disabled or MDS doesn't support umask */
545         if (!IS_POSIXACL(parent) || !exp_connect_umask(ll_i2mdexp(parent)))
546                 it->it_create_mode &= ~cfs_curproc_umask();
547
548         rc = md_intent_lock(ll_i2mdexp(parent), op_data, NULL, 0, it,
549                             lookup_flags, &req, ll_md_blocking_ast, 0);
550         ll_finish_md_op_data(op_data);
551         if (rc < 0)
552                 GOTO(out, retval = ERR_PTR(rc));
553
554         rc = ll_lookup_it_finish(req, it, &icbd);
555         if (rc != 0) {
556                 ll_intent_release(it);
557                 GOTO(out, retval = ERR_PTR(rc));
558         }
559
560         if ((it->it_op & IT_OPEN) && dentry->d_inode &&
561             !S_ISREG(dentry->d_inode->i_mode) &&
562             !S_ISDIR(dentry->d_inode->i_mode)) {
563                 ll_release_openhandle(dentry, it);
564         }
565         ll_lookup_finish_locks(it, dentry);
566
567         if (dentry == save)
568                 GOTO(out, retval = NULL);
569         else
570                 GOTO(out, retval = dentry);
571  out:
572         if (req)
573                 ptlrpc_req_finished(req);
574         if (it->it_op == IT_GETATTR && (retval == NULL || retval == dentry))
575                 ll_statahead_mark(parent, dentry);
576         return retval;
577 }
578
579 #ifdef HAVE_IOP_ATOMIC_OPEN
580 static struct dentry *ll_lookup_nd(struct inode *parent, struct dentry *dentry,
581                                    unsigned int flags)
582 {
583         struct lookup_intent *itp, it = { .it_op = IT_GETATTR };
584         struct dentry *de;
585
586         CDEBUG(D_VFSTRACE, "VFS Op:name=%.*s,dir=%lu/%u(%p),flags=%u\n",
587                dentry->d_name.len, dentry->d_name.name, parent->i_ino,
588                parent->i_generation, parent, flags);
589
590         /* Optimize away (CREATE && !OPEN). Let .create handle the race. */
591         if ((flags & LOOKUP_CREATE ) && !(flags & LOOKUP_OPEN)) {
592                 ll_dops_init(dentry, 1, 1);
593                 __d_lustre_invalidate(dentry);
594                 d_add(dentry, NULL);
595                 return NULL;
596         }
597
598         if (flags & (LOOKUP_PARENT|LOOKUP_OPEN|LOOKUP_CREATE))
599                 itp = NULL;
600         else
601                 itp = &it;
602         de = ll_lookup_it(parent, dentry, itp, 0);
603
604         if (itp != NULL)
605                 ll_intent_release(itp);
606
607         return de;
608 }
609
610 /*
611  * For cached negative dentry and new dentry, handle lookup/create/open
612  * together.
613  */
614 static int ll_atomic_open(struct inode *dir, struct dentry *dentry,
615                           struct file *file, unsigned open_flags,
616                           umode_t mode, int *opened)
617 {
618         struct lookup_intent *it;
619         struct dentry *de;
620         long long lookup_flags = LOOKUP_OPEN;
621         int rc = 0;
622         ENTRY;
623
624         CDEBUG(D_VFSTRACE, "VFS Op:name=%.*s,dir=%lu/%u(%p),file %p,"
625                            "open_flags %x,mode %x opened %d\n",
626                dentry->d_name.len, dentry->d_name.name, dir->i_ino,
627                dir->i_generation, dir, file, open_flags, mode, *opened);
628
629         OBD_ALLOC(it, sizeof(*it));
630         if (!it)
631                 RETURN(-ENOMEM);
632
633         it->it_op = IT_OPEN;
634         if (mode) {
635                 it->it_op |= IT_CREAT;
636                 lookup_flags |= LOOKUP_CREATE;
637         }
638         it->it_create_mode = (mode & S_IALLUGO) | S_IFREG;
639         it->it_flags = (open_flags & ~O_ACCMODE) | OPEN_FMODE(open_flags);
640
641         /* Dentry added to dcache tree in ll_lookup_it */
642         de = ll_lookup_it(dir, dentry, it, lookup_flags);
643         if (IS_ERR(de))
644                 rc = PTR_ERR(de);
645         else if (de != NULL)
646                 dentry = de;
647
648         if (!rc) {
649                 if (it_disposition(it, DISP_OPEN_CREATE)) {
650                         /* Dentry instantiated in ll_create_it. */
651                         rc = ll_create_it(dir, dentry, mode, it);
652                         if (rc) {
653                                 /* We dget in ll_splice_alias. */
654                                 if (de != NULL)
655                                         dput(de);
656                                 goto out_release;
657                         }
658
659                         *opened |= FILE_CREATED;
660                 }
661                 if (dentry->d_inode && it_disposition(it, DISP_OPEN_OPEN)) {
662                         /* Open dentry. */
663                         if (S_ISFIFO(dentry->d_inode->i_mode)) {
664                                 /* We cannot call open here as it would
665                                  * deadlock.
666                                  */
667                                 if (it_disposition(it, DISP_ENQ_OPEN_REF))
668                                         ptlrpc_req_finished(
669                                                        (struct ptlrpc_request *)
670                                                           it->d.lustre.it_data);
671                                 rc = finish_no_open(file, de);
672                         } else {
673                                 file->private_data = it;
674                                 rc = finish_open(file, dentry, NULL, opened);
675                                 /* We dget in ll_splice_alias. finish_open takes
676                                  * care of dget for fd open.
677                                  */
678                                 if (de != NULL)
679                                         dput(de);
680                         }
681                 } else {
682                         rc = finish_no_open(file, de);
683                 }
684         }
685
686 out_release:
687         ll_intent_release(it);
688         OBD_FREE(it, sizeof(*it));
689
690         RETURN(rc);
691 }
692
693 #else /* !HAVE_IOP_ATOMIC_OPEN */
694 struct lookup_intent *ll_convert_intent(struct open_intent *oit,
695                                         int lookup_flags)
696 {
697         struct lookup_intent *it;
698
699         OBD_ALLOC(it, sizeof(*it));
700         if (!it)
701                 return ERR_PTR(-ENOMEM);
702
703         if (lookup_flags & LOOKUP_OPEN) {
704                 it->it_op = IT_OPEN;
705                 if (lookup_flags & LOOKUP_CREATE)
706                         it->it_op |= IT_CREAT;
707                 it->it_create_mode = (oit->create_mode & S_IALLUGO) | S_IFREG;
708                 it->it_flags = ll_namei_to_lookup_intent_flag(oit->flags);
709         } else {
710                 it->it_op = IT_GETATTR;
711         }
712
713         return it;
714 }
715
716 static struct dentry *ll_lookup_nd(struct inode *parent, struct dentry *dentry,
717                                    struct nameidata *nd)
718 {
719         struct dentry *de;
720         ENTRY;
721
722         if (nd && !(nd->flags & (LOOKUP_CONTINUE|LOOKUP_PARENT))) {
723                 struct lookup_intent *it;
724
725                 if (ll_d2d(dentry) && ll_d2d(dentry)->lld_it) {
726                         it = ll_d2d(dentry)->lld_it;
727                         ll_d2d(dentry)->lld_it = NULL;
728                 } else {
729                         if ((nd->flags & LOOKUP_CREATE ) && !(nd->flags & LOOKUP_OPEN)) {
730                                 /* We are sure this is new dentry, so we need to create
731                                    our private data and set the dentry ops */ 
732                                 ll_dops_init(dentry, 1, 1);
733                                 __d_lustre_invalidate(dentry);
734                                 d_add(dentry, NULL);
735                                 RETURN(NULL);
736                         }
737                         it = ll_convert_intent(&nd->intent.open, nd->flags);
738                         if (IS_ERR(it))
739                                 RETURN((struct dentry *)it);
740                 }
741
742                 de = ll_lookup_it(parent, dentry, it, nd->flags);
743                 if (de)
744                         dentry = de;
745                 if ((nd->flags & LOOKUP_OPEN) && !IS_ERR(dentry)) { /* Open */
746                         if (dentry->d_inode &&
747                             it_disposition(it, DISP_OPEN_OPEN)) { /* nocreate */
748                                 if (S_ISFIFO(dentry->d_inode->i_mode)) {
749                                         // We cannot call open here as it would
750                                         // deadlock.
751                                         ptlrpc_req_finished(
752                                                        (struct ptlrpc_request *)
753                                                           it->d.lustre.it_data);
754                                 } else {
755                                         struct file *filp;
756
757                                         nd->intent.open.file->private_data = it;
758                                         filp = lookup_instantiate_filp(nd,
759                                                                        dentry,
760                                                                        NULL);
761                                         if (IS_ERR(filp)) {
762                                                 if (de)
763                                                         dput(de);
764                                                 de = (struct dentry *)filp;
765                                         }
766                                 }
767                         } else if (it_disposition(it, DISP_OPEN_CREATE)) {
768                                 // XXX This can only reliably work on assumption
769                                 // that there are NO hashed negative dentries.
770                                 ll_d2d(dentry)->lld_it = it;
771                                 it = NULL; /* Will be freed in ll_create_nd */
772                                 /* We absolutely depend on ll_create_nd to be
773                                  * called to not leak this intent and possible
774                                  * data attached to it */
775                         }
776                 }
777
778                 if (it) {
779                         ll_intent_release(it);
780                         OBD_FREE(it, sizeof(*it));
781                 }
782         } else {
783                 de = ll_lookup_it(parent, dentry, NULL, 0);
784         }
785
786         RETURN(de);
787 }
788 #endif /* HAVE_IOP_ATOMIC_OPEN */
789
790 /* We depend on "mode" being set with the proper file type/umask by now */
791 static struct inode *ll_create_node(struct inode *dir, const char *name,
792                                     int namelen, const void *data, int datalen,
793                                     int mode, __u64 extra,
794                                     struct lookup_intent *it)
795 {
796         struct inode *inode = NULL;
797         struct ptlrpc_request *request = NULL;
798         struct ll_sb_info *sbi = ll_i2sbi(dir);
799         int rc;
800         ENTRY;
801
802         LASSERT(it && it->d.lustre.it_disposition);
803
804         LASSERT(it_disposition(it, DISP_ENQ_CREATE_REF));
805         request = it->d.lustre.it_data;
806         it_clear_disposition(it, DISP_ENQ_CREATE_REF);
807         rc = ll_prep_inode(&inode, request, dir->i_sb, it);
808         if (rc)
809                 GOTO(out, inode = ERR_PTR(rc));
810
811         LASSERT(ll_d_hlist_empty(&inode->i_dentry));
812
813         /* We asked for a lock on the directory, but were granted a
814          * lock on the inode.  Since we finally have an inode pointer,
815          * stuff it in the lock. */
816         CDEBUG(D_DLMTRACE, "setting l_ast_data to inode %p (%lu/%u)\n",
817                inode, inode->i_ino, inode->i_generation);
818         ll_set_lock_data(sbi->ll_md_exp, inode, it, NULL);
819         EXIT;
820  out:
821         ptlrpc_req_finished(request);
822         return inode;
823 }
824
825 /*
826  * By the time this is called, we already have created the directory cache
827  * entry for the new file, but it is so far negative - it has no inode.
828  *
829  * We defer creating the OBD object(s) until open, to keep the intent and
830  * non-intent code paths similar, and also because we do not have the MDS
831  * inode number before calling ll_create_node() (which is needed for LOV),
832  * so we would need to do yet another RPC to the MDS to store the LOV EA
833  * data on the MDS.  If needed, we would pass the PACKED lmm as data and
834  * lmm_size in datalen (the MDS still has code which will handle that).
835  *
836  * If the create succeeds, we fill in the inode information
837  * with d_instantiate().
838  */
839 static int ll_create_it(struct inode *dir, struct dentry *dentry, int mode,
840                         struct lookup_intent *it)
841 {
842         struct inode *inode;
843         int rc = 0;
844         ENTRY;
845
846         CDEBUG(D_VFSTRACE, "VFS Op:name=%.*s,dir=%lu/%u(%p),intent=%s\n",
847                dentry->d_name.len, dentry->d_name.name, dir->i_ino,
848                dir->i_generation, dir, LL_IT2STR(it));
849
850         rc = it_open_error(DISP_OPEN_CREATE, it);
851         if (rc)
852                 RETURN(rc);
853
854         inode = ll_create_node(dir, dentry->d_name.name, dentry->d_name.len,
855                                NULL, 0, mode, 0, it);
856         if (IS_ERR(inode))
857                 RETURN(PTR_ERR(inode));
858
859         if (filename_is_volatile(dentry->d_name.name, dentry->d_name.len, NULL))
860                 ll_i2info(inode)->lli_volatile = true;
861
862         d_instantiate(dentry, inode);
863         RETURN(0);
864 }
865
866 static void ll_update_times(struct ptlrpc_request *request,
867                             struct inode *inode)
868 {
869         struct mdt_body *body = req_capsule_server_get(&request->rq_pill,
870                                                        &RMF_MDT_BODY);
871
872         LASSERT(body);
873         if (body->valid & OBD_MD_FLMTIME &&
874             body->mtime > LTIME_S(inode->i_mtime)) {
875                 CDEBUG(D_INODE, "setting ino %lu mtime from %lu to "LPU64"\n",
876                        inode->i_ino, LTIME_S(inode->i_mtime), body->mtime);
877                 LTIME_S(inode->i_mtime) = body->mtime;
878         }
879         if (body->valid & OBD_MD_FLCTIME &&
880             body->ctime > LTIME_S(inode->i_ctime))
881                 LTIME_S(inode->i_ctime) = body->ctime;
882 }
883
884 static int ll_new_node(struct inode *dir, struct qstr *name,
885                        const char *tgt, int mode, int rdev,
886                        struct dentry *dchild, __u32 opc)
887 {
888         struct ptlrpc_request *request = NULL;
889         struct md_op_data *op_data;
890         struct inode *inode = NULL;
891         struct ll_sb_info *sbi = ll_i2sbi(dir);
892         int tgt_len = 0;
893         int err;
894
895         ENTRY;
896         if (unlikely(tgt != NULL))
897                 tgt_len = strlen(tgt) + 1;
898
899         op_data = ll_prep_md_op_data(NULL, dir, NULL, name->name,
900                                      name->len, 0, opc, NULL);
901         if (IS_ERR(op_data))
902                 GOTO(err_exit, err = PTR_ERR(op_data));
903
904         err = md_create(sbi->ll_md_exp, op_data, tgt, tgt_len, mode,
905                         cfs_curproc_fsuid(), cfs_curproc_fsgid(),
906                         cfs_curproc_cap_pack(), rdev, &request);
907         ll_finish_md_op_data(op_data);
908         if (err)
909                 GOTO(err_exit, err);
910
911         ll_update_times(request, dir);
912
913         if (dchild) {
914                 err = ll_prep_inode(&inode, request, dchild->d_sb, NULL);
915                 if (err)
916                      GOTO(err_exit, err);
917
918                 d_instantiate(dchild, inode);
919         }
920         EXIT;
921 err_exit:
922         ptlrpc_req_finished(request);
923
924         return err;
925 }
926
927 static int ll_mknod_generic(struct inode *dir, struct qstr *name, int mode,
928                             unsigned rdev, struct dentry *dchild)
929 {
930         int err;
931         ENTRY;
932
933         CDEBUG(D_VFSTRACE, "VFS Op:name=%.*s,dir=%lu/%u(%p) mode %o dev %x\n",
934                name->len, name->name, dir->i_ino, dir->i_generation, dir,
935                mode, rdev);
936
937         if (!IS_POSIXACL(dir) || !exp_connect_umask(ll_i2mdexp(dir)))
938                 mode &= ~cfs_curproc_umask();
939
940         switch (mode & S_IFMT) {
941         case 0:
942                 mode |= S_IFREG; /* for mode = 0 case, fallthrough */
943         case S_IFREG:
944         case S_IFCHR:
945         case S_IFBLK:
946         case S_IFIFO:
947         case S_IFSOCK:
948                 err = ll_new_node(dir, name, NULL, mode, rdev, dchild,
949                                   LUSTRE_OPC_MKNOD);
950                 break;
951         case S_IFDIR:
952                 err = -EPERM;
953                 break;
954         default:
955                 err = -EINVAL;
956         }
957
958         if (!err)
959                 ll_stats_ops_tally(ll_i2sbi(dir), LPROC_LL_MKNOD, 1);
960
961         RETURN(err);
962 }
963
964 #ifdef HAVE_IOP_ATOMIC_OPEN
965 /*
966  * Plain create. Intent create is handled in atomic_open.
967  */
968 static int ll_create_nd(struct inode *dir, struct dentry *dentry,
969                         umode_t mode, bool want_excl)
970 {
971         int rc;
972
973         CDEBUG(D_VFSTRACE, "VFS Op:name=%.*s,dir=%lu/%u(%p),"
974                            "flags=%u, excl=%d\n",
975                dentry->d_name.len, dentry->d_name.name, dir->i_ino,
976                dir->i_generation, dir, mode, want_excl);
977
978         rc = ll_mknod_generic(dir, &dentry->d_name, mode, 0, dentry);
979
980         ll_stats_ops_tally(ll_i2sbi(dir), LPROC_LL_CREATE, 1);
981
982         CDEBUG(D_VFSTRACE, "VFS Op:name=%.*s, unhashed %d\n",
983                dentry->d_name.len, dentry->d_name.name, d_unhashed(dentry));
984
985         return rc;
986 }
987 #else /* !HAVE_IOP_ATOMIC_OPEN */
988 static int ll_create_nd(struct inode *dir, struct dentry *dentry,
989                         ll_umode_t mode, struct nameidata *nd)
990 {
991         struct lookup_intent *it = ll_d2d(dentry)->lld_it;
992         int rc;
993
994         if (!it)
995                 return ll_mknod_generic(dir, &dentry->d_name, mode, 0, dentry);
996
997         ll_d2d(dentry)->lld_it = NULL;
998
999         /* Was there an error? Propagate it! */
1000         if (it->d.lustre.it_status) {
1001                 rc = it->d.lustre.it_status;
1002                 goto out;
1003         }
1004
1005         rc = ll_create_it(dir, dentry, mode, it);
1006         if (nd && (nd->flags & LOOKUP_OPEN) && dentry->d_inode) { /* Open */
1007                 struct file *filp;
1008
1009                 nd->intent.open.file->private_data = it;
1010                 filp = lookup_instantiate_filp(nd, dentry, NULL);
1011                 if (IS_ERR(filp))
1012                         rc = PTR_ERR(filp);
1013         }
1014
1015 out:
1016         ll_intent_release(it);
1017         OBD_FREE(it, sizeof(*it));
1018
1019         if (!rc)
1020                 ll_stats_ops_tally(ll_i2sbi(dir), LPROC_LL_CREATE, 1);
1021
1022         return rc;
1023 }
1024 #endif /* HAVE_IOP_ATOMIC_OPEN */
1025
1026 static int ll_symlink_generic(struct inode *dir, struct qstr *name,
1027                               const char *tgt, struct dentry *dchild)
1028 {
1029         int err;
1030         ENTRY;
1031
1032         CDEBUG(D_VFSTRACE, "VFS Op:name=%.*s,dir=%lu/%u(%p),target=%.*s\n",
1033                name->len, name->name, dir->i_ino, dir->i_generation,
1034                dir, 3000, tgt);
1035
1036         err = ll_new_node(dir, name, (char *)tgt, S_IFLNK | S_IRWXUGO,
1037                           0, dchild, LUSTRE_OPC_SYMLINK);
1038
1039         if (!err)
1040                 ll_stats_ops_tally(ll_i2sbi(dir), LPROC_LL_SYMLINK, 1);
1041
1042         RETURN(err);
1043 }
1044
1045 static int ll_link_generic(struct inode *src,  struct inode *dir,
1046                            struct qstr *name, struct dentry *dchild)
1047 {
1048         struct ll_sb_info *sbi = ll_i2sbi(dir);
1049         struct ptlrpc_request *request = NULL;
1050         struct md_op_data *op_data;
1051         int err;
1052
1053         ENTRY;
1054         CDEBUG(D_VFSTRACE,
1055                "VFS Op: inode=%lu/%u(%p), dir=%lu/%u(%p), target=%.*s\n",
1056                src->i_ino, src->i_generation, src, dir->i_ino,
1057                dir->i_generation, dir, name->len, name->name);
1058
1059         op_data = ll_prep_md_op_data(NULL, src, dir, name->name, name->len,
1060                                      0, LUSTRE_OPC_ANY, NULL);
1061         if (IS_ERR(op_data))
1062                 RETURN(PTR_ERR(op_data));
1063
1064         err = md_link(sbi->ll_md_exp, op_data, &request);
1065         ll_finish_md_op_data(op_data);
1066         if (err)
1067                 GOTO(out, err);
1068
1069         ll_update_times(request, dir);
1070         ll_stats_ops_tally(sbi, LPROC_LL_LINK, 1);
1071         EXIT;
1072 out:
1073         ptlrpc_req_finished(request);
1074         RETURN(err);
1075 }
1076
1077 static int ll_mkdir_generic(struct inode *dir, struct qstr *name,
1078                             int mode, struct dentry *dchild)
1079
1080 {
1081         int err;
1082         ENTRY;
1083
1084         CDEBUG(D_VFSTRACE, "VFS Op:name=%.*s,dir=%lu/%u(%p)\n",
1085                name->len, name->name, dir->i_ino, dir->i_generation, dir);
1086
1087         if (!IS_POSIXACL(dir) || !exp_connect_umask(ll_i2mdexp(dir)))
1088                 mode &= ~cfs_curproc_umask();
1089         mode = (mode & (S_IRWXUGO|S_ISVTX)) | S_IFDIR;
1090         err = ll_new_node(dir, name, NULL, mode, 0, dchild, LUSTRE_OPC_MKDIR);
1091
1092         if (!err)
1093                 ll_stats_ops_tally(ll_i2sbi(dir), LPROC_LL_MKDIR, 1);
1094
1095         RETURN(err);
1096 }
1097
1098 /* Try to find the child dentry by its name.
1099    If found, put the result fid into @fid. */
1100 static void ll_get_child_fid(struct inode * dir, struct qstr *name,
1101                              struct lu_fid *fid)
1102 {
1103         struct dentry *parent, *child;
1104
1105         parent = ll_d_hlist_entry(dir->i_dentry, struct dentry, d_alias);
1106         child = d_lookup(parent, name);
1107         if (child) {
1108                 if (child->d_inode)
1109                         *fid = *ll_inode2fid(child->d_inode);
1110                 dput(child);
1111         }
1112 }
1113
1114 static int ll_rmdir_generic(struct inode *dir, struct dentry *dparent,
1115                             struct dentry *dchild, struct qstr *name)
1116 {
1117         struct ptlrpc_request *request = NULL;
1118         struct md_op_data *op_data;
1119         int rc;
1120         ENTRY;
1121
1122         CDEBUG(D_VFSTRACE, "VFS Op:name=%.*s,dir=%lu/%u(%p)\n",
1123                name->len, name->name, dir->i_ino, dir->i_generation, dir);
1124
1125         if (unlikely(ll_d_mountpoint(dparent, dchild, name)))
1126                 RETURN(-EBUSY);
1127
1128         op_data = ll_prep_md_op_data(NULL, dir, NULL, name->name, name->len,
1129                                      S_IFDIR, LUSTRE_OPC_ANY, NULL);
1130         if (IS_ERR(op_data))
1131                 RETURN(PTR_ERR(op_data));
1132
1133         ll_get_child_fid(dir, name, &op_data->op_fid3);
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=%lu/%u(%p)\n",
1157                namelen, name, dir->i_ino, dir->i_generation, 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=%lu/%u(%p)\n",
1263                name->len, name->name, dir->i_ino, dir->i_generation, 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         ll_get_child_fid(dir, name, &op_data->op_fid3);
1278         op_data->op_fid2 = op_data->op_fid3;
1279         rc = md_unlink(ll_i2sbi(dir)->ll_md_exp, op_data, &request);
1280         ll_finish_md_op_data(op_data);
1281         if (rc)
1282                 GOTO(out, rc);
1283
1284         ll_update_times(request, dir);
1285         ll_stats_ops_tally(ll_i2sbi(dir), LPROC_LL_UNLINK, 1);
1286
1287         rc = ll_objects_destroy(request, dir);
1288  out:
1289         ptlrpc_req_finished(request);
1290         RETURN(rc);
1291 }
1292
1293 static int ll_rename_generic(struct inode *src, struct dentry *src_dparent,
1294                              struct dentry *src_dchild, struct qstr *src_name,
1295                              struct inode *tgt, struct dentry *tgt_dparent,
1296                              struct dentry *tgt_dchild, struct qstr *tgt_name)
1297 {
1298         struct ptlrpc_request *request = NULL;
1299         struct ll_sb_info *sbi = ll_i2sbi(src);
1300         struct md_op_data *op_data;
1301         int err;
1302         ENTRY;
1303         CDEBUG(D_VFSTRACE,"VFS Op:oldname=%.*s,src_dir=%lu/%u(%p),newname=%.*s,"
1304                "tgt_dir=%lu/%u(%p)\n", src_name->len, src_name->name,
1305                src->i_ino, src->i_generation, src, tgt_name->len,
1306                tgt_name->name, tgt->i_ino, tgt->i_generation, tgt);
1307
1308         if (unlikely(ll_d_mountpoint(src_dparent, src_dchild, src_name) ||
1309             ll_d_mountpoint(tgt_dparent, tgt_dchild, tgt_name)))
1310                 RETURN(-EBUSY);
1311
1312         op_data = ll_prep_md_op_data(NULL, src, tgt, NULL, 0, 0,
1313                                      LUSTRE_OPC_ANY, NULL);
1314         if (IS_ERR(op_data))
1315                 RETURN(PTR_ERR(op_data));
1316
1317         ll_get_child_fid(src, src_name, &op_data->op_fid3);
1318         ll_get_child_fid(tgt, tgt_name, &op_data->op_fid4);
1319         err = md_rename(sbi->ll_md_exp, op_data,
1320                         src_name->name, src_name->len,
1321                         tgt_name->name, tgt_name->len, &request);
1322         ll_finish_md_op_data(op_data);
1323         if (!err) {
1324                 ll_update_times(request, src);
1325                 ll_update_times(request, tgt);
1326                 ll_stats_ops_tally(sbi, LPROC_LL_RENAME, 1);
1327                 err = ll_objects_destroy(request, src);
1328         }
1329
1330         ptlrpc_req_finished(request);
1331
1332         RETURN(err);
1333 }
1334
1335 static int ll_mknod(struct inode *dir, struct dentry *dchild, ll_umode_t mode,
1336                     dev_t rdev)
1337 {
1338         return ll_mknod_generic(dir, &dchild->d_name, mode,
1339                                 old_encode_dev(rdev), dchild);
1340 }
1341
1342 static int ll_unlink(struct inode * dir, struct dentry *dentry)
1343 {
1344         return ll_unlink_generic(dir, NULL, dentry, &dentry->d_name);
1345 }
1346
1347 static int ll_mkdir(struct inode *dir, struct dentry *dentry, ll_umode_t mode)
1348 {
1349         return ll_mkdir_generic(dir, &dentry->d_name, mode, dentry);
1350 }
1351
1352 static int ll_rmdir(struct inode *dir, struct dentry *dentry)
1353 {
1354         return ll_rmdir_generic(dir, NULL, dentry, &dentry->d_name);
1355 }
1356
1357 static int ll_symlink(struct inode *dir, struct dentry *dentry,
1358                       const char *oldname)
1359 {
1360         return ll_symlink_generic(dir, &dentry->d_name, oldname, dentry);
1361 }
1362
1363 static int ll_link(struct dentry *old_dentry, struct inode *dir,
1364                    struct dentry *new_dentry)
1365 {
1366         return ll_link_generic(old_dentry->d_inode, dir, &new_dentry->d_name,
1367                                new_dentry);
1368 }
1369
1370 static int ll_rename(struct inode *old_dir, struct dentry *old_dentry,
1371                      struct inode *new_dir, struct dentry *new_dentry)
1372 {
1373         int err;
1374         err = ll_rename_generic(old_dir, NULL,
1375                                  old_dentry, &old_dentry->d_name,
1376                                  new_dir, NULL, new_dentry,
1377                                  &new_dentry->d_name);
1378         if (!err) {
1379 #ifndef HAVE_FS_RENAME_DOES_D_MOVE
1380                 if (!S_ISDIR(old_dentry->d_inode->i_mode))
1381 #endif
1382                         d_move(old_dentry, new_dentry);
1383         }
1384         return err;
1385 }
1386
1387 struct inode_operations ll_dir_inode_operations = {
1388         .mknod              = ll_mknod,
1389 #ifdef HAVE_IOP_ATOMIC_OPEN
1390         .atomic_open        = ll_atomic_open,
1391 #endif
1392         .lookup             = ll_lookup_nd,
1393         .create             = ll_create_nd,
1394         /* We need all these non-raw things for NFSD, to not patch it. */
1395         .unlink             = ll_unlink,
1396         .mkdir              = ll_mkdir,
1397         .rmdir              = ll_rmdir,
1398         .symlink            = ll_symlink,
1399         .link               = ll_link,
1400         .rename             = ll_rename,
1401         .setattr            = ll_setattr,
1402         .getattr            = ll_getattr,
1403         .permission         = ll_inode_permission,
1404         .setxattr           = ll_setxattr,
1405         .getxattr           = ll_getxattr,
1406         .listxattr          = ll_listxattr,
1407         .removexattr        = ll_removexattr,
1408 #ifdef HAVE_IOP_GET_ACL
1409         .get_acl            = ll_get_acl,
1410 #endif
1411 };
1412
1413 struct inode_operations ll_special_inode_operations = {
1414         .setattr        = ll_setattr,
1415         .getattr        = ll_getattr,
1416         .permission     = ll_inode_permission,
1417         .setxattr       = ll_setxattr,
1418         .getxattr       = ll_getxattr,
1419         .listxattr      = ll_listxattr,
1420         .removexattr    = ll_removexattr,
1421 #ifdef HAVE_IOP_GET_ACL
1422         .get_acl            = ll_get_acl,
1423 #endif
1424 };