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LU-1994 llite: atomic_open support
[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, 2012, Whamcloud, Inc.
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                                 rc = cl_file_inode_init(inode, md);
155                         if (rc != 0) {
156                                 md->lsm = NULL;
157                                 make_bad_inode(inode);
158                                 unlock_new_inode(inode);
159                                 iput(inode);
160                                 inode = ERR_PTR(rc);
161                         } else
162                                 unlock_new_inode(inode);
163                 } else if (!(inode->i_state & (I_FREEING | I_CLEAR)))
164                         ll_update_inode(inode, md);
165                 CDEBUG(D_VFSTRACE, "got inode: %p for "DFID"\n",
166                        inode, PFID(&md->body->fid1));
167         }
168         RETURN(inode);
169 }
170
171 static void ll_invalidate_negative_children(struct inode *dir)
172 {
173         struct dentry *dentry, *tmp_subdir;
174         struct ll_d_hlist_node *p;
175
176         ll_lock_dcache(dir);
177         ll_d_hlist_for_each_entry(dentry, p, &dir->i_dentry, d_alias) {
178                 spin_lock(&dentry->d_lock);
179                 if (!list_empty(&dentry->d_subdirs)) {
180                         struct dentry *child;
181
182                         list_for_each_entry_safe(child, tmp_subdir,
183                                                  &dentry->d_subdirs,
184                                                  d_u.d_child) {
185                                 if (child->d_inode == NULL)
186                                         d_lustre_invalidate(child);
187                         }
188                 }
189                 spin_unlock(&dentry->d_lock);
190         }
191         ll_unlock_dcache(dir);
192 }
193
194 int ll_md_blocking_ast(struct ldlm_lock *lock, struct ldlm_lock_desc *desc,
195                        void *data, int flag)
196 {
197         int rc;
198         struct lustre_handle lockh;
199         ENTRY;
200
201         switch (flag) {
202         case LDLM_CB_BLOCKING:
203                 ldlm_lock2handle(lock, &lockh);
204                 rc = ldlm_cli_cancel(&lockh);
205                 if (rc < 0) {
206                         CDEBUG(D_INODE, "ldlm_cli_cancel: %d\n", rc);
207                         RETURN(rc);
208                 }
209                 break;
210         case LDLM_CB_CANCELING: {
211                 struct inode *inode = ll_inode_from_lock(lock);
212                 struct ll_inode_info *lli;
213                 __u64 bits = lock->l_policy_data.l_inodebits.bits;
214                 struct lu_fid *fid;
215                 ldlm_mode_t mode = lock->l_req_mode;
216
217                 /* Invalidate all dentries associated with this inode */
218                 if (inode == NULL)
219                         break;
220
221                 LASSERT(lock->l_flags & LDLM_FL_CANCELING);
222                 /* For OPEN locks we differentiate between lock modes
223                  * LCK_CR, LCK_CW, LCK_PR - bug 22891 */
224                 if (bits & (MDS_INODELOCK_LOOKUP | MDS_INODELOCK_UPDATE |
225                             MDS_INODELOCK_LAYOUT))
226                         ll_have_md_lock(inode, &bits, LCK_MINMODE);
227
228                 if (bits & MDS_INODELOCK_OPEN)
229                         ll_have_md_lock(inode, &bits, mode);
230
231                 fid = ll_inode2fid(inode);
232                 if (lock->l_resource->lr_name.name[0] != fid_seq(fid) ||
233                     lock->l_resource->lr_name.name[1] != fid_oid(fid) ||
234                     lock->l_resource->lr_name.name[2] != fid_ver(fid)) {
235                         LDLM_ERROR(lock, "data mismatch with object "
236                                    DFID" (%p)", PFID(fid), inode);
237                 }
238
239                 if (bits & MDS_INODELOCK_OPEN) {
240                         int flags = 0;
241                         switch (lock->l_req_mode) {
242                         case LCK_CW:
243                                 flags = FMODE_WRITE;
244                                 break;
245                         case LCK_PR:
246                                 flags = FMODE_EXEC;
247                                 break;
248                         case LCK_CR:
249                                 flags = FMODE_READ;
250                                 break;
251                         default:
252                                 CERROR("Unexpected lock mode for OPEN lock "
253                                        "%d, inode %ld\n", lock->l_req_mode,
254                                        inode->i_ino);
255                         }
256                         ll_md_real_close(inode, flags);
257                 }
258
259                 lli = ll_i2info(inode);
260                 if (bits & MDS_INODELOCK_LAYOUT) {
261                         struct cl_object_conf conf = { .coc_inode = inode,
262                                                        .coc_invalidate = true };
263                         rc = ll_layout_conf(inode, &conf);
264                         if (rc)
265                                 CDEBUG(D_INODE, "invaliding layout %d.\n", rc);
266                 }
267
268                 if (bits & MDS_INODELOCK_UPDATE)
269                         lli->lli_flags &= ~LLIF_MDS_SIZE_LOCK;
270
271                 if (S_ISDIR(inode->i_mode) &&
272                      (bits & MDS_INODELOCK_UPDATE)) {
273                         CDEBUG(D_INODE, "invalidating inode %lu\n",
274                                inode->i_ino);
275                         truncate_inode_pages(inode->i_mapping, 0);
276                         ll_invalidate_negative_children(inode);
277                 }
278
279                 if (inode->i_sb->s_root &&
280                     inode != inode->i_sb->s_root->d_inode &&
281                     (bits & MDS_INODELOCK_LOOKUP))
282                         ll_invalidate_aliases(inode);
283                 iput(inode);
284                 break;
285         }
286         default:
287                 LBUG();
288         }
289
290         RETURN(0);
291 }
292
293 __u32 ll_i2suppgid(struct inode *i)
294 {
295         if (cfs_curproc_is_in_groups(i->i_gid))
296                 return (__u32)i->i_gid;
297         else
298                 return (__u32)(-1);
299 }
300
301 /* Pack the required supplementary groups into the supplied groups array.
302  * If we don't need to use the groups from the target inode(s) then we
303  * instead pack one or more groups from the user's supplementary group
304  * array in case it might be useful.  Not needed if doing an MDS-side upcall. */
305 void ll_i2gids(__u32 *suppgids, struct inode *i1, struct inode *i2)
306 {
307 #if 0
308         int i;
309 #endif
310
311         LASSERT(i1 != NULL);
312         LASSERT(suppgids != NULL);
313
314         suppgids[0] = ll_i2suppgid(i1);
315
316         if (i2)
317                 suppgids[1] = ll_i2suppgid(i2);
318                 else
319                         suppgids[1] = -1;
320
321 #if 0
322         for (i = 0; i < current_ngroups; i++) {
323                 if (suppgids[0] == -1) {
324                         if (current_groups[i] != suppgids[1])
325                                 suppgids[0] = current_groups[i];
326                         continue;
327                 }
328                 if (suppgids[1] == -1) {
329                         if (current_groups[i] != suppgids[0])
330                                 suppgids[1] = current_groups[i];
331                         continue;
332                 }
333                 break;
334         }
335 #endif
336 }
337
338 /*
339  * try to reuse three types of dentry:
340  * 1. unhashed alias, this one is unhashed by d_invalidate (but it may be valid
341  *    by concurrent .revalidate).
342  * 2. INVALID alias (common case for no valid ldlm lock held, but this flag may
343  *    be cleared by others calling d_lustre_revalidate).
344  * 3. DISCONNECTED alias.
345  */
346 static struct dentry *ll_find_alias(struct inode *inode, struct dentry *dentry)
347 {
348         struct dentry *alias, *discon_alias, *invalid_alias;
349         struct ll_d_hlist_node *p;
350
351         if (ll_d_hlist_empty(&inode->i_dentry))
352                 return NULL;
353
354         discon_alias = invalid_alias = NULL;
355
356         ll_lock_dcache(inode);
357         ll_d_hlist_for_each_entry(alias, p, &inode->i_dentry, d_alias) {
358                 LASSERT(alias != dentry);
359
360                 spin_lock(&alias->d_lock);
361                 if (alias->d_flags & DCACHE_DISCONNECTED)
362                         /* LASSERT(last_discon == NULL); LU-405, bz 20055 */
363                         discon_alias = alias;
364                 else if (alias->d_parent == dentry->d_parent             &&
365                          alias->d_name.hash == dentry->d_name.hash       &&
366                          alias->d_name.len == dentry->d_name.len         &&
367                          memcmp(alias->d_name.name, dentry->d_name.name,
368                                 dentry->d_name.len) == 0)
369                         invalid_alias = alias;
370                 spin_unlock(&alias->d_lock);
371
372                 if (invalid_alias)
373                         break;
374         }
375         alias = invalid_alias ?: discon_alias ?: NULL;
376         if (alias) {
377                 spin_lock(&alias->d_lock);
378                 dget_dlock(alias);
379                 spin_unlock(&alias->d_lock);
380         }
381         ll_unlock_dcache(inode);
382
383         return alias;
384 }
385
386 /*
387  * Similar to d_splice_alias(), but lustre treats invalid alias
388  * similar to DCACHE_DISCONNECTED, and tries to use it anyway.
389  */
390 struct dentry *ll_splice_alias(struct inode *inode, struct dentry *de)
391 {
392         struct dentry *new;
393
394         if (inode) {
395                 new = ll_find_alias(inode, de);
396                 if (new) {
397                         ll_dops_init(new, 1, 1);
398                         d_move(new, de);
399                         iput(inode);
400                         CDEBUG(D_DENTRY,
401                                "Reuse dentry %p inode %p refc %d flags %#x\n",
402                               new, new->d_inode, d_refcount(new), new->d_flags);
403                         return new;
404                 }
405         }
406         ll_dops_init(de, 1, 1);
407         __d_lustre_invalidate(de);
408         d_add(de, inode);
409         CDEBUG(D_DENTRY, "Add dentry %p inode %p refc %d flags %#x\n",
410                de, de->d_inode, d_refcount(de), de->d_flags);
411         return de;
412 }
413
414 int ll_lookup_it_finish(struct ptlrpc_request *request,
415                         struct lookup_intent *it, void *data)
416 {
417         struct it_cb_data *icbd = data;
418         struct dentry **de = icbd->icbd_childp;
419         struct inode *parent = icbd->icbd_parent;
420         struct inode *inode = NULL;
421         __u64 bits = 0;
422         int rc;
423         ENTRY;
424
425         /* NB 1 request reference will be taken away by ll_intent_lock()
426          * when I return */
427         CDEBUG(D_DENTRY, "it %p it_disposition %x\n", it,
428                it->d.lustre.it_disposition);
429         if (!it_disposition(it, DISP_LOOKUP_NEG)) {
430                 rc = ll_prep_inode(&inode, request, (*de)->d_sb);
431                 if (rc)
432                         RETURN(rc);
433
434                 ll_set_lock_data(ll_i2sbi(parent)->ll_md_exp, inode, it, &bits);
435
436                 /* We used to query real size from OSTs here, but actually
437                    this is not needed. For stat() calls size would be updated
438                    from subsequent do_revalidate()->ll_inode_revalidate_it() in
439                    2.4 and
440                    vfs_getattr_it->ll_getattr()->ll_inode_revalidate_it() in 2.6
441                    Everybody else who needs correct file size would call
442                    ll_glimpse_size or some equivalent themselves anyway.
443                    Also see bug 7198. */
444         }
445
446         /* Only hash *de if it is unhashed (new dentry).
447          * Atoimc_open may passin hashed dentries for open.
448          */
449         if (d_unhashed(*de))
450                 *de = ll_splice_alias(inode, *de);
451
452         if (!it_disposition(it, DISP_LOOKUP_NEG)) {
453                 /* we have lookup look - unhide dentry */
454                 if (bits & MDS_INODELOCK_LOOKUP)
455                         d_lustre_revalidate(*de);
456         } else if (!it_disposition(it, DISP_OPEN_CREATE)) {
457                 /* If file created on server, don't depend on parent UPDATE
458                  * lock to unhide it. It is left hidden and next lookup can
459                  * find it in ll_splice_alias.
460                  */
461                 /* Check that parent has UPDATE lock. */
462                 struct lookup_intent parent_it = {
463                                         .it_op = IT_GETATTR,
464                                         .d.lustre.it_lock_handle = 0 };
465
466                 if (md_revalidate_lock(ll_i2mdexp(parent), &parent_it,
467                                        &ll_i2info(parent)->lli_fid, NULL)) {
468                         d_lustre_revalidate(*de);
469                         ll_intent_release(&parent_it);
470                 }
471         }
472
473         RETURN(0);
474 }
475
476 static struct dentry *ll_lookup_it(struct inode *parent, struct dentry *dentry,
477                                    struct lookup_intent *it, int lookup_flags)
478 {
479         struct lookup_intent lookup_it = { .it_op = IT_LOOKUP };
480         struct dentry *save = dentry, *retval;
481         struct ptlrpc_request *req = NULL;
482         struct md_op_data *op_data;
483         struct it_cb_data icbd;
484         __u32 opc;
485         int rc;
486         ENTRY;
487
488         if (dentry->d_name.len > ll_i2sbi(parent)->ll_namelen)
489                 RETURN(ERR_PTR(-ENAMETOOLONG));
490
491         CDEBUG(D_VFSTRACE, "VFS Op:name=%.*s,dir=%lu/%u(%p),intent=%s\n",
492                dentry->d_name.len, dentry->d_name.name, parent->i_ino,
493                parent->i_generation, parent, LL_IT2STR(it));
494
495         if (d_mountpoint(dentry))
496                 CERROR("Tell Peter, lookup on mtpt, it %s\n", LL_IT2STR(it));
497
498         ll_frob_intent(&it, &lookup_it);
499
500         /* As do_lookup is called before follow_mount, root dentry may be left
501          * not valid, revalidate it here. */
502         if (parent->i_sb->s_root && (parent->i_sb->s_root->d_inode == parent) &&
503             (it->it_op & (IT_OPEN | IT_CREAT))) {
504                 rc = ll_inode_revalidate_it(parent->i_sb->s_root, it,
505                                             MDS_INODELOCK_LOOKUP);
506                 if (rc)
507                         RETURN(ERR_PTR(rc));
508         }
509
510         if (it->it_op == IT_GETATTR) {
511                 rc = ll_statahead_enter(parent, &dentry, 0);
512                 if (rc == 1) {
513                         if (dentry == save)
514                                 GOTO(out, retval = NULL);
515                         GOTO(out, retval = dentry);
516                 }
517         }
518
519         icbd.icbd_childp = &dentry;
520         icbd.icbd_parent = parent;
521
522         if (it->it_op & IT_CREAT ||
523             (it->it_op & IT_OPEN && it->it_create_mode & O_CREAT))
524                 opc = LUSTRE_OPC_CREATE;
525         else
526                 opc = LUSTRE_OPC_ANY;
527
528         op_data = ll_prep_md_op_data(NULL, parent, NULL, dentry->d_name.name,
529                                      dentry->d_name.len, lookup_flags, opc,
530                                      NULL);
531         if (IS_ERR(op_data))
532                 RETURN((void *)op_data);
533
534         /* enforce umask if acl disabled or MDS doesn't support umask */
535         if (!IS_POSIXACL(parent) || !exp_connect_umask(ll_i2mdexp(parent)))
536                 it->it_create_mode &= ~cfs_curproc_umask();
537
538         rc = md_intent_lock(ll_i2mdexp(parent), op_data, NULL, 0, it,
539                             lookup_flags, &req, ll_md_blocking_ast, 0);
540         ll_finish_md_op_data(op_data);
541         if (rc < 0)
542                 GOTO(out, retval = ERR_PTR(rc));
543
544         rc = ll_lookup_it_finish(req, it, &icbd);
545         if (rc != 0) {
546                 ll_intent_release(it);
547                 GOTO(out, retval = ERR_PTR(rc));
548         }
549
550         if ((it->it_op & IT_OPEN) && dentry->d_inode &&
551             !S_ISREG(dentry->d_inode->i_mode) &&
552             !S_ISDIR(dentry->d_inode->i_mode)) {
553                 ll_release_openhandle(dentry, it);
554         }
555         ll_lookup_finish_locks(it, dentry);
556
557         if (dentry == save)
558                 GOTO(out, retval = NULL);
559         else
560                 GOTO(out, retval = dentry);
561  out:
562         if (req)
563                 ptlrpc_req_finished(req);
564         if (it->it_op == IT_GETATTR && (retval == NULL || retval == dentry))
565                 ll_statahead_mark(parent, dentry);
566         return retval;
567 }
568
569 #ifdef HAVE_IOP_ATOMIC_OPEN
570 static struct dentry *ll_lookup_nd(struct inode *parent, struct dentry *dentry,
571                                    unsigned int flags)
572 {
573         struct lookup_intent *itp, it = { .it_op = IT_GETATTR };
574         struct dentry *de;
575
576         CDEBUG(D_VFSTRACE, "VFS Op:name=%.*s,dir=%lu/%u(%p),flags=%u\n",
577                dentry->d_name.len, dentry->d_name.name, parent->i_ino,
578                parent->i_generation, parent, flags);
579
580         /* Optimize away (CREATE && !OPEN). Let .create handle the race. */
581         if ((flags & LOOKUP_CREATE ) && !(flags & LOOKUP_OPEN)) {
582                 ll_dops_init(dentry, 1, 1);
583                 __d_lustre_invalidate(dentry);
584                 d_add(dentry, NULL);
585                 return NULL;
586         }
587
588         if (flags & (LOOKUP_PARENT|LOOKUP_OPEN|LOOKUP_CREATE))
589                 itp = NULL;
590         else
591                 itp = &it;
592         de = ll_lookup_it(parent, dentry, itp, 0);
593
594         if (itp != NULL)
595                 ll_intent_release(itp);
596
597         return de;
598 }
599
600 /*
601  * For cached negative dentry and new dentry, handle lookup/create/open
602  * together.
603  */
604 static int ll_atomic_open(struct inode *dir, struct dentry *dentry,
605                           struct file *file, unsigned open_flags,
606                           umode_t mode, int *opened)
607 {
608         struct lookup_intent *it;
609         struct dentry *de;
610         long long lookup_flags = LOOKUP_OPEN;
611         int rc = 0;
612         ENTRY;
613
614         CDEBUG(D_VFSTRACE, "VFS Op:name=%.*s,dir=%lu/%u(%p),file %p,"
615                            "open_flags %x,mode %x opened %d\n",
616                dentry->d_name.len, dentry->d_name.name, dir->i_ino,
617                dir->i_generation, dir, file, open_flags, mode, *opened);
618
619         OBD_ALLOC(it, sizeof(*it));
620         if (!it)
621                 RETURN(-ENOMEM);
622
623         it->it_op = IT_OPEN;
624         if (mode) {
625                 it->it_op |= IT_CREAT;
626                 lookup_flags |= LOOKUP_CREATE;
627         }
628         it->it_create_mode = (mode & S_IALLUGO) | S_IFREG;
629         it->it_flags = (open_flags & ~O_ACCMODE) | OPEN_FMODE(open_flags);
630
631         /* Dentry added to dcache tree in ll_lookup_it */
632         de = ll_lookup_it(dir, dentry, it, lookup_flags);
633         if (IS_ERR(de))
634                 rc = PTR_ERR(de);
635         else if (de != NULL)
636                 dentry = de;
637
638         if (!rc) {
639                 if (it_disposition(it, DISP_OPEN_CREATE)) {
640                         /* Dentry instantiated in ll_create_it. */
641                         rc = ll_create_it(dir, dentry, mode, it);
642                         if (rc) {
643                                 /* We dget in ll_splice_alias. */
644                                 if (de != NULL)
645                                         dput(de);
646                                 goto out_release;
647                         }
648
649                         *opened |= FILE_CREATED;
650                 }
651                 if (dentry->d_inode && it_disposition(it, DISP_OPEN_OPEN)) {
652                         /* Open dentry. */
653                         if (S_ISFIFO(dentry->d_inode->i_mode)) {
654                                 /* We cannot call open here as it would
655                                  * deadlock.
656                                  */
657                                 if (it_disposition(it, DISP_ENQ_OPEN_REF))
658                                         ptlrpc_req_finished(
659                                                        (struct ptlrpc_request *)
660                                                           it->d.lustre.it_data);
661                                 rc = finish_no_open(file, de);
662                         } else {
663                                 file->private_data = it;
664                                 rc = finish_open(file, dentry, NULL, opened);
665                                 /* We dget in ll_splice_alias. finish_open takes
666                                  * care of dget for fd open.
667                                  */
668                                 if (de != NULL)
669                                         dput(de);
670                         }
671                 } else {
672                         rc = finish_no_open(file, de);
673                 }
674         }
675
676 out_release:
677         ll_intent_release(it);
678         OBD_FREE(it, sizeof(*it));
679
680         RETURN(rc);
681 }
682
683 #else /* !HAVE_IOP_ATOMIC_OPEN */
684 struct lookup_intent *ll_convert_intent(struct open_intent *oit,
685                                         int lookup_flags)
686 {
687         struct lookup_intent *it;
688
689         OBD_ALLOC(it, sizeof(*it));
690         if (!it)
691                 return ERR_PTR(-ENOMEM);
692
693         if (lookup_flags & LOOKUP_OPEN) {
694                 it->it_op = IT_OPEN;
695                 if (lookup_flags & LOOKUP_CREATE)
696                         it->it_op |= IT_CREAT;
697                 it->it_create_mode = (oit->create_mode & S_IALLUGO) | S_IFREG;
698                 it->it_flags = ll_namei_to_lookup_intent_flag(oit->flags);
699         } else {
700                 it->it_op = IT_GETATTR;
701         }
702
703         return it;
704 }
705
706 static struct dentry *ll_lookup_nd(struct inode *parent, struct dentry *dentry,
707                                    struct nameidata *nd)
708 {
709         struct dentry *de;
710         ENTRY;
711
712         if (nd && !(nd->flags & (LOOKUP_CONTINUE|LOOKUP_PARENT))) {
713                 struct lookup_intent *it;
714
715                 if (ll_d2d(dentry) && ll_d2d(dentry)->lld_it) {
716                         it = ll_d2d(dentry)->lld_it;
717                         ll_d2d(dentry)->lld_it = NULL;
718                 } else {
719                         if ((nd->flags & LOOKUP_CREATE ) && !(nd->flags & LOOKUP_OPEN)) {
720                                 /* We are sure this is new dentry, so we need to create
721                                    our private data and set the dentry ops */ 
722                                 ll_dops_init(dentry, 1, 1);
723                                 __d_lustre_invalidate(dentry);
724                                 d_add(dentry, NULL);
725                                 RETURN(NULL);
726                         }
727                         it = ll_convert_intent(&nd->intent.open, nd->flags);
728                         if (IS_ERR(it))
729                                 RETURN((struct dentry *)it);
730                 }
731
732                 de = ll_lookup_it(parent, dentry, it, nd->flags);
733                 if (de)
734                         dentry = de;
735                 if ((nd->flags & LOOKUP_OPEN) && !IS_ERR(dentry)) { /* Open */
736                         if (dentry->d_inode &&
737                             it_disposition(it, DISP_OPEN_OPEN)) { /* nocreate */
738                                 if (S_ISFIFO(dentry->d_inode->i_mode)) {
739                                         // We cannot call open here as it would
740                                         // deadlock.
741                                         ptlrpc_req_finished(
742                                                        (struct ptlrpc_request *)
743                                                           it->d.lustre.it_data);
744                                 } else {
745                                         struct file *filp;
746
747                                         nd->intent.open.file->private_data = it;
748                                         filp = lookup_instantiate_filp(nd,
749                                                                        dentry,
750                                                                        NULL);
751                                         if (IS_ERR(filp)) {
752                                                 if (de)
753                                                         dput(de);
754                                                 de = (struct dentry *)filp;
755                                         }
756                                 }
757                         } else if (it_disposition(it, DISP_OPEN_CREATE)) {
758                                 // XXX This can only reliably work on assumption
759                                 // that there are NO hashed negative dentries.
760                                 ll_d2d(dentry)->lld_it = it;
761                                 it = NULL; /* Will be freed in ll_create_nd */
762                                 /* We absolutely depend on ll_create_nd to be
763                                  * called to not leak this intent and possible
764                                  * data attached to it */
765                         }
766                 }
767
768                 if (it) {
769                         ll_intent_release(it);
770                         OBD_FREE(it, sizeof(*it));
771                 }
772         } else {
773                 de = ll_lookup_it(parent, dentry, NULL, 0);
774         }
775
776         RETURN(de);
777 }
778 #endif /* HAVE_IOP_ATOMIC_OPEN */
779
780 /* We depend on "mode" being set with the proper file type/umask by now */
781 static struct inode *ll_create_node(struct inode *dir, const char *name,
782                                     int namelen, const void *data, int datalen,
783                                     int mode, __u64 extra,
784                                     struct lookup_intent *it)
785 {
786         struct inode *inode = NULL;
787         struct ptlrpc_request *request = NULL;
788         struct ll_sb_info *sbi = ll_i2sbi(dir);
789         int rc;
790         ENTRY;
791
792         LASSERT(it && it->d.lustre.it_disposition);
793
794         LASSERT(it_disposition(it, DISP_ENQ_CREATE_REF));
795         request = it->d.lustre.it_data;
796         it_clear_disposition(it, DISP_ENQ_CREATE_REF);
797         rc = ll_prep_inode(&inode, request, dir->i_sb);
798         if (rc)
799                 GOTO(out, inode = ERR_PTR(rc));
800
801         LASSERT(ll_d_hlist_empty(&inode->i_dentry));
802
803         /* We asked for a lock on the directory, but were granted a
804          * lock on the inode.  Since we finally have an inode pointer,
805          * stuff it in the lock. */
806         CDEBUG(D_DLMTRACE, "setting l_ast_data to inode %p (%lu/%u)\n",
807                inode, inode->i_ino, inode->i_generation);
808         ll_set_lock_data(sbi->ll_md_exp, inode, it, NULL);
809         EXIT;
810  out:
811         ptlrpc_req_finished(request);
812         return inode;
813 }
814
815 /*
816  * By the time this is called, we already have created the directory cache
817  * entry for the new file, but it is so far negative - it has no inode.
818  *
819  * We defer creating the OBD object(s) until open, to keep the intent and
820  * non-intent code paths similar, and also because we do not have the MDS
821  * inode number before calling ll_create_node() (which is needed for LOV),
822  * so we would need to do yet another RPC to the MDS to store the LOV EA
823  * data on the MDS.  If needed, we would pass the PACKED lmm as data and
824  * lmm_size in datalen (the MDS still has code which will handle that).
825  *
826  * If the create succeeds, we fill in the inode information
827  * with d_instantiate().
828  */
829 static int ll_create_it(struct inode *dir, struct dentry *dentry, int mode,
830                         struct lookup_intent *it)
831 {
832         struct inode *inode;
833         int rc = 0;
834         ENTRY;
835
836         CDEBUG(D_VFSTRACE, "VFS Op:name=%.*s,dir=%lu/%u(%p),intent=%s\n",
837                dentry->d_name.len, dentry->d_name.name, dir->i_ino,
838                dir->i_generation, dir, LL_IT2STR(it));
839
840         rc = it_open_error(DISP_OPEN_CREATE, it);
841         if (rc)
842                 RETURN(rc);
843
844         inode = ll_create_node(dir, dentry->d_name.name, dentry->d_name.len,
845                                NULL, 0, mode, 0, it);
846         if (IS_ERR(inode))
847                 RETURN(PTR_ERR(inode));
848
849         d_instantiate(dentry, inode);
850         RETURN(0);
851 }
852
853 static void ll_update_times(struct ptlrpc_request *request,
854                             struct inode *inode)
855 {
856         struct mdt_body *body = req_capsule_server_get(&request->rq_pill,
857                                                        &RMF_MDT_BODY);
858
859         LASSERT(body);
860         if (body->valid & OBD_MD_FLMTIME &&
861             body->mtime > LTIME_S(inode->i_mtime)) {
862                 CDEBUG(D_INODE, "setting ino %lu mtime from %lu to "LPU64"\n",
863                        inode->i_ino, LTIME_S(inode->i_mtime), body->mtime);
864                 LTIME_S(inode->i_mtime) = body->mtime;
865         }
866         if (body->valid & OBD_MD_FLCTIME &&
867             body->ctime > LTIME_S(inode->i_ctime))
868                 LTIME_S(inode->i_ctime) = body->ctime;
869 }
870
871 static int ll_new_node(struct inode *dir, struct qstr *name,
872                        const char *tgt, int mode, int rdev,
873                        struct dentry *dchild, __u32 opc)
874 {
875         struct ptlrpc_request *request = NULL;
876         struct md_op_data *op_data;
877         struct inode *inode = NULL;
878         struct ll_sb_info *sbi = ll_i2sbi(dir);
879         int tgt_len = 0;
880         int err;
881
882         ENTRY;
883         if (unlikely(tgt != NULL))
884                 tgt_len = strlen(tgt) + 1;
885
886         op_data = ll_prep_md_op_data(NULL, dir, NULL, name->name,
887                                      name->len, 0, opc, NULL);
888         if (IS_ERR(op_data))
889                 GOTO(err_exit, err = PTR_ERR(op_data));
890
891         err = md_create(sbi->ll_md_exp, op_data, tgt, tgt_len, mode,
892                         cfs_curproc_fsuid(), cfs_curproc_fsgid(),
893                         cfs_curproc_cap_pack(), rdev, &request);
894         ll_finish_md_op_data(op_data);
895         if (err)
896                 GOTO(err_exit, err);
897
898         ll_update_times(request, dir);
899
900         if (dchild) {
901                 err = ll_prep_inode(&inode, request, dchild->d_sb);
902                 if (err)
903                      GOTO(err_exit, err);
904
905                 d_instantiate(dchild, inode);
906         }
907         EXIT;
908 err_exit:
909         ptlrpc_req_finished(request);
910
911         return err;
912 }
913
914 static int ll_mknod_generic(struct inode *dir, struct qstr *name, int mode,
915                             unsigned rdev, struct dentry *dchild)
916 {
917         int err;
918         ENTRY;
919
920         CDEBUG(D_VFSTRACE, "VFS Op:name=%.*s,dir=%lu/%u(%p) mode %o dev %x\n",
921                name->len, name->name, dir->i_ino, dir->i_generation, dir,
922                mode, rdev);
923
924         if (!IS_POSIXACL(dir) || !exp_connect_umask(ll_i2mdexp(dir)))
925                 mode &= ~cfs_curproc_umask();
926
927         switch (mode & S_IFMT) {
928         case 0:
929                 mode |= S_IFREG; /* for mode = 0 case, fallthrough */
930         case S_IFREG:
931         case S_IFCHR:
932         case S_IFBLK:
933         case S_IFIFO:
934         case S_IFSOCK:
935                 err = ll_new_node(dir, name, NULL, mode, rdev, dchild,
936                                   LUSTRE_OPC_MKNOD);
937                 break;
938         case S_IFDIR:
939                 err = -EPERM;
940                 break;
941         default:
942                 err = -EINVAL;
943         }
944
945         if (!err)
946                 ll_stats_ops_tally(ll_i2sbi(dir), LPROC_LL_MKNOD, 1);
947
948         RETURN(err);
949 }
950
951 #ifdef HAVE_IOP_ATOMIC_OPEN
952 /*
953  * Plain create. Intent create is handled in atomic_open.
954  */
955 static int ll_create_nd(struct inode *dir, struct dentry *dentry,
956                         umode_t mode, bool want_excl)
957 {
958         int rc;
959
960         CDEBUG(D_VFSTRACE, "VFS Op:name=%.*s,dir=%lu/%u(%p),"
961                            "flags=%u, excl=%d\n",
962                dentry->d_name.len, dentry->d_name.name, dir->i_ino,
963                dir->i_generation, dir, mode, want_excl);
964
965         rc = ll_mknod_generic(dir, &dentry->d_name, mode, 0, dentry);
966
967         ll_stats_ops_tally(ll_i2sbi(dir), LPROC_LL_CREATE, 1);
968
969         CDEBUG(D_VFSTRACE, "VFS Op:name=%.*s, unhashed %d\n",
970                dentry->d_name.len, dentry->d_name.name, d_unhashed(dentry));
971
972         return rc;
973 }
974 #else /* !HAVE_IOP_ATOMIC_OPEN */
975 static int ll_create_nd(struct inode *dir, struct dentry *dentry,
976                         ll_umode_t mode, struct nameidata *nd)
977 {
978         struct lookup_intent *it = ll_d2d(dentry)->lld_it;
979         int rc;
980
981         if (!it)
982                 return ll_mknod_generic(dir, &dentry->d_name, mode, 0, dentry);
983
984         ll_d2d(dentry)->lld_it = NULL;
985
986         /* Was there an error? Propagate it! */
987         if (it->d.lustre.it_status) {
988                 rc = it->d.lustre.it_status;
989                 goto out;
990         }
991
992         rc = ll_create_it(dir, dentry, mode, it);
993         if (nd && (nd->flags & LOOKUP_OPEN) && dentry->d_inode) { /* Open */
994                 struct file *filp;
995
996                 nd->intent.open.file->private_data = it;
997                 filp = lookup_instantiate_filp(nd, dentry, NULL);
998                 if (IS_ERR(filp))
999                         rc = PTR_ERR(filp);
1000         }
1001
1002 out:
1003         ll_intent_release(it);
1004         OBD_FREE(it, sizeof(*it));
1005
1006         if (!rc)
1007                 ll_stats_ops_tally(ll_i2sbi(dir), LPROC_LL_CREATE, 1);
1008
1009         return rc;
1010 }
1011 #endif /* HAVE_IOP_ATOMIC_OPEN */
1012
1013 static int ll_symlink_generic(struct inode *dir, struct qstr *name,
1014                               const char *tgt, struct dentry *dchild)
1015 {
1016         int err;
1017         ENTRY;
1018
1019         CDEBUG(D_VFSTRACE, "VFS Op:name=%.*s,dir=%lu/%u(%p),target=%.*s\n",
1020                name->len, name->name, dir->i_ino, dir->i_generation,
1021                dir, 3000, tgt);
1022
1023         err = ll_new_node(dir, name, (char *)tgt, S_IFLNK | S_IRWXUGO,
1024                           0, dchild, LUSTRE_OPC_SYMLINK);
1025
1026         if (!err)
1027                 ll_stats_ops_tally(ll_i2sbi(dir), LPROC_LL_SYMLINK, 1);
1028
1029         RETURN(err);
1030 }
1031
1032 static int ll_link_generic(struct inode *src,  struct inode *dir,
1033                            struct qstr *name, struct dentry *dchild)
1034 {
1035         struct ll_sb_info *sbi = ll_i2sbi(dir);
1036         struct ptlrpc_request *request = NULL;
1037         struct md_op_data *op_data;
1038         int err;
1039
1040         ENTRY;
1041         CDEBUG(D_VFSTRACE,
1042                "VFS Op: inode=%lu/%u(%p), dir=%lu/%u(%p), target=%.*s\n",
1043                src->i_ino, src->i_generation, src, dir->i_ino,
1044                dir->i_generation, dir, name->len, name->name);
1045
1046         op_data = ll_prep_md_op_data(NULL, src, dir, name->name, name->len,
1047                                      0, LUSTRE_OPC_ANY, NULL);
1048         if (IS_ERR(op_data))
1049                 RETURN(PTR_ERR(op_data));
1050
1051         err = md_link(sbi->ll_md_exp, op_data, &request);
1052         ll_finish_md_op_data(op_data);
1053         if (err)
1054                 GOTO(out, err);
1055
1056         ll_update_times(request, dir);
1057         ll_stats_ops_tally(sbi, LPROC_LL_LINK, 1);
1058         EXIT;
1059 out:
1060         ptlrpc_req_finished(request);
1061         RETURN(err);
1062 }
1063
1064 static int ll_mkdir_generic(struct inode *dir, struct qstr *name,
1065                             int mode, struct dentry *dchild)
1066
1067 {
1068         int err;
1069         ENTRY;
1070
1071         CDEBUG(D_VFSTRACE, "VFS Op:name=%.*s,dir=%lu/%u(%p)\n",
1072                name->len, name->name, dir->i_ino, dir->i_generation, dir);
1073
1074         if (!IS_POSIXACL(dir) || !exp_connect_umask(ll_i2mdexp(dir)))
1075                 mode &= ~cfs_curproc_umask();
1076         mode = (mode & (S_IRWXUGO|S_ISVTX)) | S_IFDIR;
1077         err = ll_new_node(dir, name, NULL, mode, 0, dchild, LUSTRE_OPC_MKDIR);
1078
1079         if (!err)
1080                 ll_stats_ops_tally(ll_i2sbi(dir), LPROC_LL_MKDIR, 1);
1081
1082         RETURN(err);
1083 }
1084
1085 /* Try to find the child dentry by its name.
1086    If found, put the result fid into @fid. */
1087 static void ll_get_child_fid(struct inode * dir, struct qstr *name,
1088                              struct lu_fid *fid)
1089 {
1090         struct dentry *parent, *child;
1091
1092         parent = ll_d_hlist_entry(dir->i_dentry, struct dentry, d_alias);
1093         child = d_lookup(parent, name);
1094         if (child) {
1095                 if (child->d_inode)
1096                         *fid = *ll_inode2fid(child->d_inode);
1097                 dput(child);
1098         }
1099 }
1100
1101 static int ll_rmdir_generic(struct inode *dir, struct dentry *dparent,
1102                             struct dentry *dchild, struct qstr *name)
1103 {
1104         struct ptlrpc_request *request = NULL;
1105         struct md_op_data *op_data;
1106         int rc;
1107         ENTRY;
1108
1109         CDEBUG(D_VFSTRACE, "VFS Op:name=%.*s,dir=%lu/%u(%p)\n",
1110                name->len, name->name, dir->i_ino, dir->i_generation, dir);
1111
1112         if (unlikely(ll_d_mountpoint(dparent, dchild, name)))
1113                 RETURN(-EBUSY);
1114
1115         op_data = ll_prep_md_op_data(NULL, dir, NULL, name->name, name->len,
1116                                      S_IFDIR, LUSTRE_OPC_ANY, NULL);
1117         if (IS_ERR(op_data))
1118                 RETURN(PTR_ERR(op_data));
1119
1120         ll_get_child_fid(dir, name, &op_data->op_fid3);
1121         rc = md_unlink(ll_i2sbi(dir)->ll_md_exp, op_data, &request);
1122         ll_finish_md_op_data(op_data);
1123         if (rc == 0) {
1124                 ll_update_times(request, dir);
1125                 ll_stats_ops_tally(ll_i2sbi(dir), LPROC_LL_RMDIR, 1);
1126         }
1127
1128         ptlrpc_req_finished(request);
1129         RETURN(rc);
1130 }
1131
1132 int ll_objects_destroy(struct ptlrpc_request *request, struct inode *dir)
1133 {
1134         struct mdt_body *body;
1135         struct lov_mds_md *eadata;
1136         struct lov_stripe_md *lsm = NULL;
1137         struct obd_trans_info oti = { 0 };
1138         struct obdo *oa;
1139         struct obd_capa *oc = NULL;
1140         int rc;
1141         ENTRY;
1142
1143         /* req is swabbed so this is safe */
1144         body = req_capsule_server_get(&request->rq_pill, &RMF_MDT_BODY);
1145         if (!(body->valid & OBD_MD_FLEASIZE))
1146                 RETURN(0);
1147
1148         if (body->eadatasize == 0) {
1149                 CERROR("OBD_MD_FLEASIZE set but eadatasize zero\n");
1150                 GOTO(out, rc = -EPROTO);
1151         }
1152
1153         /* The MDS sent back the EA because we unlinked the last reference
1154          * to this file. Use this EA to unlink the objects on the OST.
1155          * It's opaque so we don't swab here; we leave it to obd_unpackmd() to
1156          * check it is complete and sensible. */
1157         eadata = req_capsule_server_sized_get(&request->rq_pill, &RMF_MDT_MD,
1158                                               body->eadatasize);
1159         LASSERT(eadata != NULL);
1160
1161         rc = obd_unpackmd(ll_i2dtexp(dir), &lsm, eadata, body->eadatasize);
1162         if (rc < 0) {
1163                 CERROR("obd_unpackmd: %d\n", rc);
1164                 GOTO(out, rc);
1165         }
1166         LASSERT(rc >= sizeof(*lsm));
1167
1168         OBDO_ALLOC(oa);
1169         if (oa == NULL)
1170                 GOTO(out_free_memmd, rc = -ENOMEM);
1171
1172         oa->o_id = lsm->lsm_object_id;
1173         oa->o_seq = lsm->lsm_object_seq;
1174         oa->o_mode = body->mode & S_IFMT;
1175         oa->o_valid = OBD_MD_FLID | OBD_MD_FLTYPE | OBD_MD_FLGROUP;
1176
1177         if (body->valid & OBD_MD_FLCOOKIE) {
1178                 oa->o_valid |= OBD_MD_FLCOOKIE;
1179                 oti.oti_logcookies =
1180                         req_capsule_server_sized_get(&request->rq_pill,
1181                                                      &RMF_LOGCOOKIES,
1182                                                    sizeof(struct llog_cookie) *
1183                                                      lsm->lsm_stripe_count);
1184                 if (oti.oti_logcookies == NULL) {
1185                         oa->o_valid &= ~OBD_MD_FLCOOKIE;
1186                         body->valid &= ~OBD_MD_FLCOOKIE;
1187                 }
1188         }
1189
1190         if (body->valid & OBD_MD_FLOSSCAPA) {
1191                 rc = md_unpack_capa(ll_i2mdexp(dir), request, &RMF_CAPA2, &oc);
1192                 if (rc)
1193                         GOTO(out_free_memmd, rc);
1194         }
1195
1196         rc = obd_destroy(NULL, ll_i2dtexp(dir), oa, lsm, &oti,
1197                          ll_i2mdexp(dir), oc);
1198         capa_put(oc);
1199         OBDO_FREE(oa);
1200         if (rc)
1201                 CERROR("obd destroy objid "LPX64" error %d\n",
1202                        lsm->lsm_object_id, rc);
1203  out_free_memmd:
1204         obd_free_memmd(ll_i2dtexp(dir), &lsm);
1205  out:
1206         return rc;
1207 }
1208
1209 /* ll_unlink_generic() doesn't update the inode with the new link count.
1210  * Instead, ll_ddelete() and ll_d_iput() will update it based upon if there
1211  * is any lock existing. They will recycle dentries and inodes based upon locks
1212  * too. b=20433 */
1213 static int ll_unlink_generic(struct inode *dir, struct dentry *dparent,
1214                              struct dentry *dchild, struct qstr *name)
1215 {
1216         struct ptlrpc_request *request = NULL;
1217         struct md_op_data *op_data;
1218         int rc;
1219         ENTRY;
1220         CDEBUG(D_VFSTRACE, "VFS Op:name=%.*s,dir=%lu/%u(%p)\n",
1221                name->len, name->name, dir->i_ino, dir->i_generation, dir);
1222
1223         /*
1224          * XXX: unlink bind mountpoint maybe call to here,
1225          * just check it as vfs_unlink does.
1226          */
1227         if (unlikely(ll_d_mountpoint(dparent, dchild, name)))
1228                 RETURN(-EBUSY);
1229
1230         op_data = ll_prep_md_op_data(NULL, dir, NULL, name->name,
1231                                      name->len, 0, LUSTRE_OPC_ANY, NULL);
1232         if (IS_ERR(op_data))
1233                 RETURN(PTR_ERR(op_data));
1234
1235         ll_get_child_fid(dir, name, &op_data->op_fid3);
1236         rc = md_unlink(ll_i2sbi(dir)->ll_md_exp, op_data, &request);
1237         ll_finish_md_op_data(op_data);
1238         if (rc)
1239                 GOTO(out, rc);
1240
1241         ll_update_times(request, dir);
1242         ll_stats_ops_tally(ll_i2sbi(dir), LPROC_LL_UNLINK, 1);
1243
1244         rc = ll_objects_destroy(request, dir);
1245  out:
1246         ptlrpc_req_finished(request);
1247         RETURN(rc);
1248 }
1249
1250 static int ll_rename_generic(struct inode *src, struct dentry *src_dparent,
1251                              struct dentry *src_dchild, struct qstr *src_name,
1252                              struct inode *tgt, struct dentry *tgt_dparent,
1253                              struct dentry *tgt_dchild, struct qstr *tgt_name)
1254 {
1255         struct ptlrpc_request *request = NULL;
1256         struct ll_sb_info *sbi = ll_i2sbi(src);
1257         struct md_op_data *op_data;
1258         int err;
1259         ENTRY;
1260         CDEBUG(D_VFSTRACE,"VFS Op:oldname=%.*s,src_dir=%lu/%u(%p),newname=%.*s,"
1261                "tgt_dir=%lu/%u(%p)\n", src_name->len, src_name->name,
1262                src->i_ino, src->i_generation, src, tgt_name->len,
1263                tgt_name->name, tgt->i_ino, tgt->i_generation, tgt);
1264
1265         if (unlikely(ll_d_mountpoint(src_dparent, src_dchild, src_name) ||
1266             ll_d_mountpoint(tgt_dparent, tgt_dchild, tgt_name)))
1267                 RETURN(-EBUSY);
1268
1269         op_data = ll_prep_md_op_data(NULL, src, tgt, NULL, 0, 0,
1270                                      LUSTRE_OPC_ANY, NULL);
1271         if (IS_ERR(op_data))
1272                 RETURN(PTR_ERR(op_data));
1273
1274         ll_get_child_fid(src, src_name, &op_data->op_fid3);
1275         ll_get_child_fid(tgt, tgt_name, &op_data->op_fid4);
1276         err = md_rename(sbi->ll_md_exp, op_data,
1277                         src_name->name, src_name->len,
1278                         tgt_name->name, tgt_name->len, &request);
1279         ll_finish_md_op_data(op_data);
1280         if (!err) {
1281                 ll_update_times(request, src);
1282                 ll_update_times(request, tgt);
1283                 ll_stats_ops_tally(sbi, LPROC_LL_RENAME, 1);
1284                 err = ll_objects_destroy(request, src);
1285         }
1286
1287         ptlrpc_req_finished(request);
1288
1289         RETURN(err);
1290 }
1291
1292 static int ll_mknod(struct inode *dir, struct dentry *dchild, ll_umode_t mode,
1293                     dev_t rdev)
1294 {
1295         return ll_mknod_generic(dir, &dchild->d_name, mode,
1296                                 old_encode_dev(rdev), dchild);
1297 }
1298
1299 static int ll_unlink(struct inode * dir, struct dentry *dentry)
1300 {
1301         return ll_unlink_generic(dir, NULL, dentry, &dentry->d_name);
1302 }
1303
1304 static int ll_mkdir(struct inode *dir, struct dentry *dentry, ll_umode_t mode)
1305 {
1306         return ll_mkdir_generic(dir, &dentry->d_name, mode, dentry);
1307 }
1308
1309 static int ll_rmdir(struct inode *dir, struct dentry *dentry)
1310 {
1311         return ll_rmdir_generic(dir, NULL, dentry, &dentry->d_name);
1312 }
1313
1314 static int ll_symlink(struct inode *dir, struct dentry *dentry,
1315                       const char *oldname)
1316 {
1317         return ll_symlink_generic(dir, &dentry->d_name, oldname, dentry);
1318 }
1319
1320 static int ll_link(struct dentry *old_dentry, struct inode *dir,
1321                    struct dentry *new_dentry)
1322 {
1323         return ll_link_generic(old_dentry->d_inode, dir, &new_dentry->d_name,
1324                                new_dentry);
1325 }
1326
1327 static int ll_rename(struct inode *old_dir, struct dentry *old_dentry,
1328                      struct inode *new_dir, struct dentry *new_dentry)
1329 {
1330         int err;
1331         err = ll_rename_generic(old_dir, NULL,
1332                                  old_dentry, &old_dentry->d_name,
1333                                  new_dir, NULL, new_dentry,
1334                                  &new_dentry->d_name);
1335         if (!err) {
1336 #ifndef HAVE_FS_RENAME_DOES_D_MOVE
1337                 if (!S_ISDIR(old_dentry->d_inode->i_mode))
1338 #endif
1339                         d_move(old_dentry, new_dentry);
1340         }
1341         return err;
1342 }
1343
1344 struct inode_operations ll_dir_inode_operations = {
1345         .mknod              = ll_mknod,
1346 #ifdef HAVE_IOP_ATOMIC_OPEN
1347         .atomic_open        = ll_atomic_open,
1348 #endif
1349         .lookup             = ll_lookup_nd,
1350         .create             = ll_create_nd,
1351         /* We need all these non-raw things for NFSD, to not patch it. */
1352         .unlink             = ll_unlink,
1353         .mkdir              = ll_mkdir,
1354         .rmdir              = ll_rmdir,
1355         .symlink            = ll_symlink,
1356         .link               = ll_link,
1357         .rename             = ll_rename,
1358         .setattr            = ll_setattr,
1359         .getattr            = ll_getattr,
1360         .permission         = ll_inode_permission,
1361         .setxattr           = ll_setxattr,
1362         .getxattr           = ll_getxattr,
1363         .listxattr          = ll_listxattr,
1364         .removexattr        = ll_removexattr,
1365 #ifdef HAVE_IOP_GET_ACL
1366         .get_acl            = ll_get_acl,
1367 #endif
1368 };
1369
1370 struct inode_operations ll_special_inode_operations = {
1371         .setattr        = ll_setattr,
1372         .getattr        = ll_getattr,
1373         .permission     = ll_inode_permission,
1374         .setxattr       = ll_setxattr,
1375         .getxattr       = ll_getxattr,
1376         .listxattr      = ll_listxattr,
1377         .removexattr    = ll_removexattr,
1378 #ifdef HAVE_IOP_GET_ACL
1379         .get_acl            = ll_get_acl,
1380 #endif
1381 };