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[fs/lustre-release.git] / lustre / llite / namei.c
1 /* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
2  * vim:expandtab:shiftwidth=8:tabstop=8:
3  *
4  *  Copyright (c) 2002, 2003 Cluster File Systems, Inc.
5  *
6  *   This file is part of Lustre, http://www.lustre.org.
7  *
8  *   Lustre is free software; you can redistribute it and/or
9  *   modify it under the terms of version 2 of the GNU General Public
10  *   License as published by the Free Software Foundation.
11  *
12  *   Lustre is distributed in the hope that it will be useful,
13  *   but WITHOUT ANY WARRANTY; without even the implied warranty of
14  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
15  *   GNU General Public License for more details.
16  *
17  *   You should have received a copy of the GNU General Public License
18  *   along with Lustre; if not, write to the Free Software
19  *   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
20  */
21
22 #include <linux/fs.h>
23 #include <linux/sched.h>
24 #include <linux/mm.h>
25 #include <linux/smp_lock.h>
26 #include <linux/quotaops.h>
27 #include <linux/highmem.h>
28 #include <linux/pagemap.h>
29
30 #define DEBUG_SUBSYSTEM S_LLITE
31
32 #include <obd_support.h>
33 #include <lustre_fid.h>
34 #include <lustre_lite.h>
35 #include <lustre_dlm.h>
36 #include <lustre_ver.h>
37 #include <lustre_mdc.h>
38 #include "llite_internal.h"
39
40 /* methods */
41 extern struct dentry_operations ll_d_ops;
42
43 /*
44  * Check if we have something mounted at the named dchild.
45  * In such a case there would always be dentry present.
46  */
47 static int ll_d_mountpoint(struct dentry *dparent, struct dentry *dchild,
48                            struct qstr *name)
49 {
50         int mounted = 0;
51
52         if (unlikely(dchild)) {
53                 mounted = d_mountpoint(dchild);
54         } else if (dparent) {
55                 dchild = d_lookup(dparent, name);
56                 if (dchild) {
57                         mounted = d_mountpoint(dchild);
58                         dput(dchild);
59                 }
60         }
61         return mounted;
62 }
63
64 int ll_unlock(__u32 mode, struct lustre_handle *lockh)
65 {
66         ENTRY;
67
68         ldlm_lock_decref(lockh, mode);
69
70         RETURN(0);
71 }
72
73
74 /* called from iget5_locked->find_inode() under inode_lock spinlock */
75 static int ll_test_inode(struct inode *inode, void *opaque)
76 {
77         struct ll_inode_info *lli = ll_i2info(inode);
78         struct lustre_md     *md = opaque;
79
80         if (unlikely(!(md->body->valid & OBD_MD_FLID))) {
81                 CERROR("MDS body missing FID\n");
82                 return 0;
83         }
84
85         if (!lu_fid_eq(&lli->lli_fid, &md->body->fid1))
86                 return 0;
87
88         return 1;
89 }
90
91 static int ll_set_inode(struct inode *inode, void *opaque)
92 {
93         return 0;
94 }
95
96
97 /*
98  * Get an inode by inode number (already instantiated by the intent lookup).
99  * Returns inode or NULL
100  */
101 struct inode *ll_iget(struct super_block *sb, ino_t hash,
102                       struct lustre_md *md)
103 {
104         struct ll_inode_info *lli;
105         struct inode         *inode;
106         ENTRY;
107
108         LASSERT(hash != 0);
109         inode = iget5_locked(sb, hash, ll_test_inode, ll_set_inode, md);
110
111         if (inode) {
112                 lli = ll_i2info(inode);
113                 if (inode->i_state & I_NEW) {
114                         ll_read_inode2(inode, md);
115                         unlock_new_inode(inode);
116                 } else {
117                         if (!(inode->i_state & (I_FREEING | I_CLEAR)))
118                                 ll_update_inode(inode, md);
119                 }
120                 CDEBUG(D_VFSTRACE, "got inode: %lu/%u(%p) for "DFID"\n",
121                        inode->i_ino, inode->i_generation, inode,
122                        PFID(&lli->lli_fid));
123         }
124
125         RETURN(inode);
126 }
127
128 static void ll_drop_negative_dentry(struct inode *dir)
129
130         struct dentry *dentry, *tmp_alias, *tmp_subdir;
131
132         spin_lock(&dcache_lock);
133 restart:
134         list_for_each_entry_safe(dentry, tmp_alias,
135                                  &dir->i_dentry,d_alias) {
136                 if (!list_empty(&dentry->d_subdirs)) {
137                         struct dentry *child;
138                         list_for_each_entry_safe(child, tmp_subdir,
139                                                  &dentry->d_subdirs,
140                                                  d_child) {
141                                 /* XXX Print some debug here? */
142                                 if (!child->d_inode)
143                                 /* Negative dentry. If we were
144                                    dropping dcache lock, go
145                                    throught the list again */
146                                         if (ll_drop_dentry(child))
147                                                 goto restart;
148                         }
149                 }
150         }
151         spin_unlock(&dcache_lock);
152 }
153
154
155 int ll_md_blocking_ast(struct ldlm_lock *lock, struct ldlm_lock_desc *desc,
156                        void *data, int flag)
157 {
158         int rc;
159         struct lustre_handle lockh;
160         ENTRY;
161
162         switch (flag) {
163         case LDLM_CB_BLOCKING:
164                 ldlm_lock2handle(lock, &lockh);
165                 rc = ldlm_cli_cancel(&lockh);
166                 if (rc < 0) {
167                         CDEBUG(D_INODE, "ldlm_cli_cancel: %d\n", rc);
168                         RETURN(rc);
169                 }
170                 break;
171         case LDLM_CB_CANCELING: {
172                 struct inode *inode = ll_inode_from_lock(lock);
173                 __u64 bits = lock->l_policy_data.l_inodebits.bits;
174                 struct lu_fid *fid;
175
176                 /* Invalidate all dentries associated with this inode */
177                 if (inode == NULL)
178                         break;
179
180                 LASSERT(lock->l_flags & LDLM_FL_CANCELING);
181                 if ((bits & MDS_INODELOCK_LOOKUP) &&
182                     ll_have_md_lock(inode, MDS_INODELOCK_LOOKUP))
183                         bits &= ~MDS_INODELOCK_LOOKUP;
184                 if ((bits & MDS_INODELOCK_UPDATE) &&
185                     ll_have_md_lock(inode, MDS_INODELOCK_UPDATE))
186                         bits &= ~MDS_INODELOCK_UPDATE;
187                 if ((bits & MDS_INODELOCK_OPEN) &&
188                     ll_have_md_lock(inode, MDS_INODELOCK_OPEN))
189                         bits &= ~MDS_INODELOCK_OPEN;
190
191                 fid = ll_inode2fid(inode);
192                 if (lock->l_resource->lr_name.name[0] != fid_seq(fid) ||
193                     lock->l_resource->lr_name.name[1] != fid_oid(fid) ||
194                     lock->l_resource->lr_name.name[2] != fid_ver(fid)) {
195                         LDLM_ERROR(lock, "data mismatch with object "
196                                    DFID" (%p)", PFID(fid), inode);
197                 }
198
199                 if (bits & MDS_INODELOCK_OPEN) {
200                         int flags = 0;
201                         switch (lock->l_req_mode) {
202                         case LCK_CW:
203                                 flags = FMODE_WRITE;
204                                 break;
205                         case LCK_PR:
206                                 flags = FMODE_EXEC;
207                                 break;
208                         case LCK_CR:
209                                 flags = FMODE_READ;
210                                 break;
211                         default:
212                                 CERROR("Unexpected lock mode for OPEN lock "
213                                        "%d, inode %ld\n", lock->l_req_mode,
214                                        inode->i_ino);
215                         }
216                         ll_md_real_close(inode, flags);
217                 }
218
219                 if (bits & MDS_INODELOCK_UPDATE)
220                         ll_i2info(inode)->lli_flags &= ~LLIF_MDS_SIZE_LOCK;
221
222                 if (S_ISDIR(inode->i_mode) &&
223                      (bits & MDS_INODELOCK_UPDATE)) {
224                         CDEBUG(D_INODE, "invalidating inode %lu\n",
225                                inode->i_ino);
226                         truncate_inode_pages(inode->i_mapping, 0);
227                         ll_drop_negative_dentry(inode);
228                 }
229
230                 if (inode->i_sb->s_root &&
231                     inode != inode->i_sb->s_root->d_inode &&
232                     (bits & MDS_INODELOCK_LOOKUP))
233                         ll_unhash_aliases(inode);
234                 iput(inode);
235                 break;
236         }
237         default:
238                 LBUG();
239         }
240
241         RETURN(0);
242 }
243
244 __u32 ll_i2suppgid(struct inode *i)
245 {
246         if (in_group_p(i->i_gid))
247                 return (__u32)i->i_gid;
248         else
249                 return (__u32)(-1);
250 }
251
252 /* Pack the required supplementary groups into the supplied groups array.
253  * If we don't need to use the groups from the target inode(s) then we
254  * instead pack one or more groups from the user's supplementary group
255  * array in case it might be useful.  Not needed if doing an MDS-side upcall. */
256 void ll_i2gids(__u32 *suppgids, struct inode *i1, struct inode *i2)
257 {
258 #if 0
259         int i;
260 #endif
261
262         LASSERT(i1 != NULL);
263         LASSERT(suppgids != NULL);
264
265         suppgids[0] = ll_i2suppgid(i1);
266
267         if (i2)
268                 suppgids[1] = ll_i2suppgid(i2);
269                 else
270                         suppgids[1] = -1;
271
272 #if 0
273         for (i = 0; i < current_ngroups; i++) {
274                 if (suppgids[0] == -1) {
275                         if (current_groups[i] != suppgids[1])
276                                 suppgids[0] = current_groups[i];
277                         continue;
278                 }
279                 if (suppgids[1] == -1) {
280                         if (current_groups[i] != suppgids[0])
281                                 suppgids[1] = current_groups[i];
282                         continue;
283                 }
284                 break;
285         }
286 #endif
287 }
288
289 static void ll_d_add(struct dentry *de, struct inode *inode)
290 {
291         CDEBUG(D_DENTRY, "adding inode %p to dentry %p\n", inode, de);
292         /* d_instantiate */
293         if (!list_empty(&de->d_alias)) {
294                 spin_unlock(&dcache_lock);
295                 CERROR("dentry %.*s %p alias next %p, prev %p\n",
296                        de->d_name.len, de->d_name.name, de,
297                        de->d_alias.next, de->d_alias.prev);
298                 LBUG();
299         }
300         if (inode)
301                 list_add(&de->d_alias, &inode->i_dentry);
302         de->d_inode = inode;
303
304         /* d_rehash */
305         if (!d_unhashed(de)) {
306                 spin_unlock(&dcache_lock);
307                 CERROR("dentry %.*s %p hash next %p\n",
308                        de->d_name.len, de->d_name.name, de, de->d_hash.next);
309                 LBUG();
310         }
311         d_rehash_cond(de, 0);
312 }
313
314 /* Search "inode"'s alias list for a dentry that has the same name and parent
315  * as de.  If found, return it.  If not found, return de.
316  * Lustre can't use d_add_unique because don't unhash aliases for directory
317  * in ll_revalidate_it.  After revaliadate inode will be have hashed aliases
318  * and it triggers BUG_ON in d_instantiate_unique (bug #10954).
319  */
320 struct dentry *ll_find_alias(struct inode *inode, struct dentry *de)
321 {
322         struct list_head *tmp;
323         struct dentry *dentry;
324         struct dentry *last_discon = NULL;
325  
326         spin_lock(&dcache_lock);
327         list_for_each(tmp, &inode->i_dentry) {
328                 dentry = list_entry(tmp, struct dentry, d_alias);
329
330                 /* We are called here with 'de' already on the aliases list. */
331                 if (unlikely(dentry == de)) {
332                         CERROR("whoops\n");
333                         continue;
334                 }
335
336                 if (dentry->d_flags & DCACHE_DISCONNECTED) {
337                         LASSERT(last_discon == NULL);
338                         last_discon = dentry;
339                         continue;
340                 }
341
342                 if (dentry->d_parent != de->d_parent)
343                         continue;
344
345                 if (dentry->d_name.hash != de->d_name.hash)
346                         continue;
347
348                 if (dentry->d_name.len != de->d_name.len)
349                         continue;
350
351                 if (memcmp(dentry->d_name.name, de->d_name.name,
352                            de->d_name.len) != 0)
353                         continue;
354
355                 dget_locked(dentry);
356                 lock_dentry(dentry);
357                 __d_drop(dentry);
358 #ifdef DCACHE_LUSTRE_INVALID
359                 dentry->d_flags &= ~DCACHE_LUSTRE_INVALID;
360 #endif
361                 unlock_dentry(dentry);
362                 d_rehash_cond(dentry, 0); /* avoid taking dcache_lock inside */
363                 spin_unlock(&dcache_lock);
364                 iput(inode);
365                 CDEBUG(D_DENTRY, "alias dentry %.*s (%p) parent %p inode %p "
366                        "refc %d\n", de->d_name.len, de->d_name.name, de,
367                        de->d_parent, de->d_inode, atomic_read(&de->d_count));
368                 return dentry;
369         }
370
371         if (last_discon) {
372                 CDEBUG(D_DENTRY, "Reuse disconnected dentry %p inode %p "
373                         "refc %d\n", last_discon, last_discon->d_inode,
374                         atomic_read(&last_discon->d_count));
375                 dget_locked(last_discon);
376                 spin_unlock(&dcache_lock);
377                 d_rehash(de);
378                 d_move(last_discon, de);
379                 iput(inode);
380                 return last_discon;
381         }
382
383         ll_d_add(de, inode);
384
385         spin_unlock(&dcache_lock);
386
387         return de;
388 }
389
390 static int lookup_it_finish(struct ptlrpc_request *request,
391                             struct lookup_intent *it,
392                             void *data)
393 {
394         struct it_cb_data *icbd = data;
395         struct dentry **de = icbd->icbd_childp;
396         struct inode *parent = icbd->icbd_parent;
397         struct ll_sb_info *sbi = ll_i2sbi(parent);
398         struct inode *inode = NULL;
399         int rc;
400
401         /* NB 1 request reference will be taken away by ll_intent_lock()
402          * when I return */
403         if (!it_disposition(it, DISP_LOOKUP_NEG)) {
404                 ENTRY;
405
406                 rc = ll_prep_inode(&inode, request, (*de)->d_sb);
407                 if (rc)
408                         RETURN(rc);
409
410                 CDEBUG(D_DLMTRACE, "setting l_data to inode %p (%lu/%u)\n",
411                        inode, inode->i_ino, inode->i_generation);
412                 md_set_lock_data(sbi->ll_md_exp,
413                                  &it->d.lustre.it_lock_handle, inode);
414
415                 /* We used to query real size from OSTs here, but actually
416                    this is not needed. For stat() calls size would be updated
417                    from subsequent do_revalidate()->ll_inode_revalidate_it() in
418                    2.4 and
419                    vfs_getattr_it->ll_getattr()->ll_inode_revalidate_it() in 2.6
420                    Everybody else who needs correct file size would call
421                    ll_glimpse_size or some equivalent themselves anyway.
422                    Also see bug 7198. */
423
424                 *de = ll_find_alias(inode, *de);
425         } else {
426                 ENTRY;
427                 /* Check that parent has UPDATE lock. If there is none, we
428                    cannot afford to hash this dentry (done by ll_d_add) as it
429                    might get picked up later when UPDATE lock will appear */
430                 if (ll_have_md_lock(parent, MDS_INODELOCK_UPDATE)) {
431                         spin_lock(&dcache_lock);
432                         ll_d_add(*de, inode);
433                         spin_unlock(&dcache_lock);
434                 } else {
435                         (*de)->d_inode = NULL;
436                         /* We do not want to hash the dentry if don`t have a
437                          * lock, but if this dentry is later used in d_move,
438                          * we'd hit uninitialised list head d_hash, so we just
439                          * do this to init d_hash field but leave dentry
440                          * unhashed. (bug 10796). */
441                         d_rehash(*de);
442                         d_drop(*de);
443                 }
444         }
445
446         ll_set_dd(*de);
447         (*de)->d_op = &ll_d_ops;
448
449         RETURN(0);
450 }
451
452 static struct dentry *ll_lookup_it(struct inode *parent, struct dentry *dentry,
453                                    struct lookup_intent *it, int lookup_flags)
454 {
455         struct lookup_intent lookup_it = { .it_op = IT_LOOKUP };
456         struct dentry *save = dentry, *retval;
457         struct ptlrpc_request *req = NULL;
458         struct md_op_data *op_data;
459         struct it_cb_data icbd;
460         __u32 opc;
461         int rc;
462         ENTRY;
463
464         if (dentry->d_name.len > ll_i2sbi(parent)->ll_namelen)
465                 RETURN(ERR_PTR(-ENAMETOOLONG));
466
467         CDEBUG(D_VFSTRACE, "VFS Op:name=%.*s,dir=%lu/%u(%p),intent=%s\n",
468                dentry->d_name.len, dentry->d_name.name, parent->i_ino,
469                parent->i_generation, parent, LL_IT2STR(it));
470
471         if (d_mountpoint(dentry))
472                 CERROR("Tell Peter, lookup on mtpt, it %s\n", LL_IT2STR(it));
473
474         ll_frob_intent(&it, &lookup_it);
475
476         /* As do_lookup is called before follow_mount, root dentry may be left
477          * not valid, revalidate it here. */
478         if (parent->i_sb->s_root && (parent->i_sb->s_root->d_inode == parent) &&
479             (it->it_op & (IT_OPEN | IT_CREAT))) {
480                 rc = ll_inode_revalidate_it(parent->i_sb->s_root, it);
481                 if (rc)
482                         RETURN(ERR_PTR(rc));
483         }
484
485         icbd.icbd_childp = &dentry;
486         icbd.icbd_parent = parent;
487
488         if (it->it_op & IT_CREAT ||
489             (it->it_op & IT_OPEN && it->it_create_mode & O_CREAT))
490                 opc = LUSTRE_OPC_CREATE;
491         else
492                 opc = LUSTRE_OPC_ANY;
493
494         op_data = ll_prep_md_op_data(NULL, parent, NULL, dentry->d_name.name,
495                                      dentry->d_name.len, lookup_flags, opc,
496                                      NULL);
497         if (IS_ERR(op_data))
498                 RETURN((void *)op_data);
499
500         it->it_create_mode &= ~current->fs->umask;
501
502         rc = md_intent_lock(ll_i2mdexp(parent), op_data, NULL, 0, it,
503                             lookup_flags, &req, ll_md_blocking_ast, 0);
504         ll_finish_md_op_data(op_data);
505         if (rc < 0)
506                 GOTO(out, retval = ERR_PTR(rc));
507
508         rc = lookup_it_finish(req, it, &icbd);
509         if (rc != 0) {
510                 ll_intent_release(it);
511                 GOTO(out, retval = ERR_PTR(rc));
512         }
513
514         if ((it->it_op & IT_OPEN) && dentry->d_inode &&
515             !S_ISREG(dentry->d_inode->i_mode) &&
516             !S_ISDIR(dentry->d_inode->i_mode)) {
517                 ll_release_openhandle(dentry, it);
518         }
519         ll_lookup_finish_locks(it, dentry);
520
521         if (dentry == save)
522                 GOTO(out, retval = NULL);
523         else
524                 GOTO(out, retval = dentry);
525  out:
526         if (req)
527                 ptlrpc_req_finished(req);
528         return retval;
529 }
530
531 #ifdef HAVE_VFS_INTENT_PATCHES
532 static struct dentry *ll_lookup_nd(struct inode *parent, struct dentry *dentry,
533                                    struct nameidata *nd)
534 {
535         struct dentry *de;
536         ENTRY;
537
538         if (nd && nd->flags & LOOKUP_LAST && !(nd->flags & LOOKUP_LINK_NOTLAST))
539                 de = ll_lookup_it(parent, dentry, &nd->intent, nd->flags);
540         else
541                 de = ll_lookup_it(parent, dentry, NULL, 0);
542
543         RETURN(de);
544 }
545 #else
546 struct lookup_intent *ll_convert_intent(struct open_intent *oit,
547                                         int lookup_flags)
548 {
549         struct lookup_intent *it;
550
551         OBD_ALLOC(it, sizeof(*it));
552         if (!it)
553                 return ERR_PTR(-ENOMEM);
554
555         if (lookup_flags & LOOKUP_OPEN) {
556                 it->it_op = IT_OPEN;
557                 if (lookup_flags & LOOKUP_CREATE)
558                         it->it_op |= IT_CREAT;
559                 it->it_create_mode = oit->create_mode;
560                 it->it_flags = oit->flags;
561         } else {
562                 it->it_op = IT_GETATTR;
563         }
564
565 #ifndef HAVE_FILE_IN_STRUCT_INTENT
566                 /* Since there is no way to pass our intent to ll_file_open,
567                  * just check the file is there. Actual open will be done
568                  * in ll_file_open */
569                 if (it->it_op & IT_OPEN)
570                         it->it_op = IT_LOOKUP;
571 #endif
572
573         return it;
574 }
575
576 static struct dentry *ll_lookup_nd(struct inode *parent, struct dentry *dentry,
577                                    struct nameidata *nd)
578 {
579         struct dentry *de;
580         ENTRY;
581
582         if (nd && !(nd->flags & (LOOKUP_CONTINUE|LOOKUP_PARENT))) {
583                 struct lookup_intent *it;
584
585 #if defined(HAVE_FILE_IN_STRUCT_INTENT) && (LINUX_VERSION_CODE < KERNEL_VERSION(2,6,17))
586                 /* Did we came here from failed revalidate just to propagate
587                  * its error? */
588                 if (nd->flags & LOOKUP_OPEN)
589                         if (IS_ERR(nd->intent.open.file))
590                                 RETURN((struct dentry *)nd->intent.open.file);
591 #endif
592
593                 if (ll_d2d(dentry) && ll_d2d(dentry)->lld_it) {
594                         it = ll_d2d(dentry)->lld_it;
595                         ll_d2d(dentry)->lld_it = NULL;
596                 } else {
597                         it = ll_convert_intent(&nd->intent.open, nd->flags);
598                         if (IS_ERR(it))
599                                 RETURN((struct dentry *)it);
600                 }
601
602                 de = ll_lookup_it(parent, dentry, it, nd->flags);
603                 if (de)
604                         dentry = de;
605                 if ((nd->flags & LOOKUP_OPEN) && !IS_ERR(dentry)) { /* Open */
606                         if (dentry->d_inode &&
607                             it_disposition(it, DISP_OPEN_OPEN)) { /* nocreate */
608 #ifdef HAVE_FILE_IN_STRUCT_INTENT
609                                 if (S_ISFIFO(dentry->d_inode->i_mode)) {
610                                         // We cannot call open here as it would
611                                         // deadlock.
612                                         ptlrpc_req_finished(
613                                                        (struct ptlrpc_request *)
614                                                           it->d.lustre.it_data);
615                                 } else {
616                                         struct file *filp;
617                                         nd->intent.open.file->private_data = it;
618                                         filp =lookup_instantiate_filp(nd,dentry,
619                                                                       NULL);
620 #if (LINUX_VERSION_CODE < KERNEL_VERSION(2,6,17))
621 /* 2.6.1[456] have a bug in open_namei() that forgets to check
622  * nd->intent.open.file for error, so we need to return it as lookup's result
623  * instead */
624                                         if (IS_ERR(filp)) {
625                                                 if (de)
626                                                         dput(de);
627                                                 de = (struct dentry *) filp;
628                                         }
629 #endif
630
631                                 }
632 #else /* HAVE_FILE_IN_STRUCT_INTENT */
633                                 /* Release open handle as we have no way to
634                                  * pass it to ll_file_open */
635                                 ll_release_openhandle(dentry, it);
636 #endif /* HAVE_FILE_IN_STRUCT_INTENT */
637                         } else if (it_disposition(it, DISP_OPEN_CREATE)) {
638                                 // XXX This can only reliably work on assumption
639                                 // that there are NO hashed negative dentries.
640                                 ll_d2d(dentry)->lld_it = it;
641                                 it = NULL; /* Will be freed in ll_create_nd */
642                                 /* We absolutely depend on ll_create_nd to be
643                                  * called to not leak this intent and possible
644                                  * data attached to it */
645                         }
646                 }
647
648                 if (it) {
649                         ll_intent_release(it);
650                         OBD_FREE(it, sizeof(*it));
651                 }
652         } else {
653                 de = ll_lookup_it(parent, dentry, NULL, 0);
654         }
655
656         RETURN(de);
657 }
658 #endif
659
660 /* We depend on "mode" being set with the proper file type/umask by now */
661 static struct inode *ll_create_node(struct inode *dir, const char *name,
662                                     int namelen, const void *data, int datalen,
663                                     int mode, __u64 extra,
664                                     struct lookup_intent *it)
665 {
666         struct inode *inode = NULL;
667         struct ptlrpc_request *request = NULL;
668         struct ll_sb_info *sbi = ll_i2sbi(dir);
669         int rc;
670         ENTRY;
671
672         LASSERT(it && it->d.lustre.it_disposition);
673
674         LASSERT(it_disposition(it, DISP_ENQ_CREATE_REF));
675         request = it->d.lustre.it_data;
676         it_clear_disposition(it, DISP_ENQ_CREATE_REF);
677         rc = ll_prep_inode(&inode, request, dir->i_sb);
678         if (rc)
679                 GOTO(out, inode = ERR_PTR(rc));
680
681         LASSERT(list_empty(&inode->i_dentry));
682
683         /* We asked for a lock on the directory, but were granted a
684          * lock on the inode.  Since we finally have an inode pointer,
685          * stuff it in the lock. */
686         CDEBUG(D_DLMTRACE, "setting l_ast_data to inode %p (%lu/%u)\n",
687                inode, inode->i_ino, inode->i_generation);
688         md_set_lock_data(sbi->ll_md_exp,
689                          &it->d.lustre.it_lock_handle, inode);
690         EXIT;
691  out:
692         ptlrpc_req_finished(request);
693         return inode;
694 }
695
696 /*
697  * By the time this is called, we already have created the directory cache
698  * entry for the new file, but it is so far negative - it has no inode.
699  *
700  * We defer creating the OBD object(s) until open, to keep the intent and
701  * non-intent code paths similar, and also because we do not have the MDS
702  * inode number before calling ll_create_node() (which is needed for LOV),
703  * so we would need to do yet another RPC to the MDS to store the LOV EA
704  * data on the MDS.  If needed, we would pass the PACKED lmm as data and
705  * lmm_size in datalen (the MDS still has code which will handle that).
706  *
707  * If the create succeeds, we fill in the inode information
708  * with d_instantiate().
709  */
710 static int ll_create_it(struct inode *dir, struct dentry *dentry, int mode,
711                         struct lookup_intent *it)
712 {
713         struct inode *inode;
714         int rc = 0;
715         ENTRY;
716
717         CDEBUG(D_VFSTRACE, "VFS Op:name=%.*s,dir=%lu/%u(%p),intent=%s\n",
718                dentry->d_name.len, dentry->d_name.name, dir->i_ino,
719                dir->i_generation, dir, LL_IT2STR(it));
720
721         rc = it_open_error(DISP_OPEN_CREATE, it);
722         if (rc)
723                 RETURN(rc);
724
725         inode = ll_create_node(dir, dentry->d_name.name, dentry->d_name.len,
726                                NULL, 0, mode, 0, it);
727         if (IS_ERR(inode)) {
728                 RETURN(PTR_ERR(inode));
729         }
730
731         d_instantiate(dentry, inode);
732         /* Negative dentry may be unhashed if parent does not have UPDATE lock,
733          * but some callers, e.g. do_coredump, expect dentry to be hashed after
734          * successful create. Hash it here. */
735         spin_lock(&dcache_lock);
736         if (d_unhashed(dentry))
737                 d_rehash_cond(dentry, 0);
738         spin_unlock(&dcache_lock);
739         RETURN(0);
740 }
741
742 static void ll_update_times(struct ptlrpc_request *request,
743                             struct inode *inode)
744 {
745         struct mdt_body *body = req_capsule_server_get(&request->rq_pill,
746                                                        &RMF_MDT_BODY);
747
748         LASSERT(body);
749         /* mtime is always updated with ctime, but can be set in past.
750            As write and utime(2) may happen within 1 second, and utime's
751            mtime has a priority over write's one, so take mtime from mds
752            for the same ctimes. */
753         if (body->valid & OBD_MD_FLCTIME &&
754             body->ctime >= LTIME_S(inode->i_ctime)) {
755                 LTIME_S(inode->i_ctime) = body->ctime;
756
757                 if (body->valid & OBD_MD_FLMTIME) {
758                         CDEBUG(D_INODE, "setting ino %lu mtime from %lu "
759                                "to "LPU64"\n", inode->i_ino,
760                                LTIME_S(inode->i_mtime), body->mtime);
761                         LTIME_S(inode->i_mtime) = body->mtime;
762                 }
763         }
764 }
765
766 static int ll_new_node(struct inode *dir, struct qstr *name,
767                        const char *tgt, int mode, int rdev,
768                        struct dentry *dchild, __u32 opc)
769 {
770         struct ptlrpc_request *request = NULL;
771         struct md_op_data *op_data;
772         struct inode *inode = NULL;
773         struct ll_sb_info *sbi = ll_i2sbi(dir);
774         int tgt_len = 0;
775         int err;
776
777         ENTRY;
778         if (unlikely(tgt != NULL))
779                 tgt_len = strlen(tgt) + 1;
780
781         op_data = ll_prep_md_op_data(NULL, dir, NULL, name->name,
782                                      name->len, 0, opc, NULL);
783         if (IS_ERR(op_data))
784                 GOTO(err_exit, err = PTR_ERR(op_data));
785
786         err = md_create(sbi->ll_md_exp, op_data, tgt, tgt_len, mode,
787                         current->fsuid, current->fsgid,
788                         current->cap_effective, rdev, &request);
789         ll_finish_md_op_data(op_data);
790         if (err)
791                 GOTO(err_exit, err);
792
793         ll_update_times(request, dir);
794
795         if (dchild) {
796                 err = ll_prep_inode(&inode, request, dchild->d_sb);
797                 if (err)
798                      GOTO(err_exit, err);
799
800                 d_drop(dchild);
801                 d_instantiate(dchild, inode);
802                 EXIT;
803         }
804 err_exit:
805         ptlrpc_req_finished(request);
806
807         return err;
808 }
809
810 static int ll_mknod_generic(struct inode *dir, struct qstr *name, int mode,
811                             unsigned rdev, struct dentry *dchild)
812 {
813         int err;
814         ENTRY;
815
816         CDEBUG(D_VFSTRACE, "VFS Op:name=%.*s,dir=%lu/%u(%p) mode %o dev %x\n",
817                name->len, name->name, dir->i_ino, dir->i_generation, dir,
818                mode, rdev);
819
820         mode &= ~current->fs->umask;
821
822         switch (mode & S_IFMT) {
823         case 0:
824                 mode |= S_IFREG; /* for mode = 0 case, fallthrough */
825         case S_IFREG:
826         case S_IFCHR:
827         case S_IFBLK:
828         case S_IFIFO:
829         case S_IFSOCK:
830                 err = ll_new_node(dir, name, NULL, mode, rdev, dchild,
831                                   LUSTRE_OPC_MKNOD);
832                 break;
833         case S_IFDIR:
834                 err = -EPERM;
835                 break;
836         default:
837                 err = -EINVAL;
838         }
839         RETURN(err);
840 }
841
842 #ifndef HAVE_VFS_INTENT_PATCHES
843 static int ll_create_nd(struct inode *dir, struct dentry *dentry,
844                         int mode, struct nameidata *nd)
845 {
846         struct lookup_intent *it = ll_d2d(dentry)->lld_it;
847         int rc;
848
849         if (!it)
850                 return ll_mknod_generic(dir, &dentry->d_name, mode, 0, dentry);
851
852         ll_d2d(dentry)->lld_it = NULL;
853
854         /* Was there an error? Propagate it! */
855         if (it->d.lustre.it_status) {
856                 rc = it->d.lustre.it_status;
857                 goto out;
858         }
859
860         rc = ll_create_it(dir, dentry, mode, it);
861 #ifdef HAVE_FILE_IN_STRUCT_INTENT
862         if (nd && (nd->flags & LOOKUP_OPEN) && dentry->d_inode) { /* Open */
863                 nd->intent.open.file->private_data = it;
864                 lookup_instantiate_filp(nd, dentry, NULL);
865         }
866 #else
867         ll_release_openhandle(dentry,it);
868 #endif
869
870 out:
871         ll_intent_release(it);
872         OBD_FREE(it, sizeof(*it));
873
874         return rc;
875 }
876 #else
877 static int ll_create_nd(struct inode *dir, struct dentry *dentry,
878                         int mode, struct nameidata *nd)
879 {
880         if (!nd || !nd->intent.d.lustre.it_disposition)
881                 /* No saved request? Just mknod the file */
882                 return ll_mknod_generic(dir, &dentry->d_name, mode, 0, dentry);
883
884         return ll_create_it(dir, dentry, mode, &nd->intent);
885 }
886 #endif
887
888 static int ll_symlink_generic(struct inode *dir, struct qstr *name,
889                               const char *tgt, struct dentry *dchild)
890 {
891         int err;
892         ENTRY;
893
894         CDEBUG(D_VFSTRACE, "VFS Op:name=%.*s,dir=%lu/%u(%p),target=%.*s\n",
895                name->len, name->name, dir->i_ino, dir->i_generation,
896                dir, 3000, tgt);
897
898         err = ll_new_node(dir, name, (char *)tgt, S_IFLNK | S_IRWXUGO,
899                           0, dchild, LUSTRE_OPC_SYMLINK);
900         RETURN(err);
901 }
902
903 static int ll_link_generic(struct inode *src,  struct inode *dir,
904                            struct qstr *name, struct dentry *dchild)
905 {
906         struct ll_sb_info *sbi = ll_i2sbi(dir);
907         struct ptlrpc_request *request = NULL;
908         struct md_op_data *op_data;
909         int err;
910
911         ENTRY;
912         CDEBUG(D_VFSTRACE,
913                "VFS Op: inode=%lu/%u(%p), dir=%lu/%u(%p), target=%.*s\n",
914                src->i_ino, src->i_generation, src, dir->i_ino,
915                dir->i_generation, dir, name->len, name->name);
916
917         op_data = ll_prep_md_op_data(NULL, src, dir, name->name, name->len,
918                                      0, LUSTRE_OPC_ANY, NULL);
919         if (IS_ERR(op_data))
920                 RETURN(PTR_ERR(op_data));
921
922         err = md_link(sbi->ll_md_exp, op_data, &request);
923         ll_finish_md_op_data(op_data);
924         if (err)
925                 GOTO(out, err);
926         if (dchild)
927                 d_drop(dchild);
928
929         ll_update_times(request, dir);
930         EXIT;
931 out:
932         ptlrpc_req_finished(request);
933         RETURN(err);
934 }
935
936 static int ll_mkdir_generic(struct inode *dir, struct qstr *name,
937                             int mode, struct dentry *dchild)
938
939 {
940         int err;
941         ENTRY;
942
943         CDEBUG(D_VFSTRACE, "VFS Op:name=%.*s,dir=%lu/%u(%p)\n",
944                name->len, name->name, dir->i_ino, dir->i_generation, dir);
945
946         mode = (mode & (S_IRWXUGO|S_ISVTX) & ~current->fs->umask) | S_IFDIR;
947         err = ll_new_node(dir, name, NULL, mode, 0, dchild, LUSTRE_OPC_MKDIR);
948
949         RETURN(err);
950 }
951
952 /* Try to find the child dentry by its name.
953    If found, put the result fid into @fid. */
954 static void ll_get_child_fid(struct inode * dir, struct qstr *name,
955                              struct lu_fid *fid)
956 {
957         struct dentry *parent, *child;
958         
959         parent = list_entry(dir->i_dentry.next, struct dentry, d_alias);
960         child = d_lookup(parent, name);
961         if (child) {
962                 if (child->d_inode)
963                         *fid = *ll_inode2fid(child->d_inode);
964                 dput(child);
965         }
966 }
967
968 static int ll_rmdir_generic(struct inode *dir, struct dentry *dparent,
969                             struct dentry *dchild, struct qstr *name)
970 {
971         struct ptlrpc_request *request = NULL;
972         struct md_op_data *op_data;
973         int rc;
974         ENTRY;
975         
976         CDEBUG(D_VFSTRACE, "VFS Op:name=%.*s,dir=%lu/%u(%p)\n",
977                name->len, name->name, dir->i_ino, dir->i_generation, dir);
978
979         if (unlikely(ll_d_mountpoint(dparent, dchild, name)))
980                 RETURN(-EBUSY);
981
982         op_data = ll_prep_md_op_data(NULL, dir, NULL, name->name, name->len,
983                                      S_IFDIR, LUSTRE_OPC_ANY, NULL);
984         if (IS_ERR(op_data))
985                 RETURN(PTR_ERR(op_data));
986
987         ll_get_child_fid(dir, name, &op_data->op_fid3);
988         rc = md_unlink(ll_i2sbi(dir)->ll_md_exp, op_data, &request);
989         ll_finish_md_op_data(op_data);
990         if (rc == 0)
991                 ll_update_times(request, dir);
992         ptlrpc_req_finished(request);
993         RETURN(rc);
994 }
995
996 int ll_objects_destroy(struct ptlrpc_request *request, struct inode *dir)
997 {
998         struct mdt_body *body;
999         struct lov_mds_md *eadata;
1000         struct lov_stripe_md *lsm = NULL;
1001         struct obd_trans_info oti = { 0 };
1002         struct obdo *oa;
1003         int rc;
1004         ENTRY;
1005
1006         /* req is swabbed so this is safe */
1007         body = req_capsule_server_get(&request->rq_pill, &RMF_MDT_BODY);
1008         if (!(body->valid & OBD_MD_FLEASIZE))
1009                 RETURN(0);
1010
1011         if (body->eadatasize == 0) {
1012                 CERROR("OBD_MD_FLEASIZE set but eadatasize zero\n");
1013                 GOTO(out, rc = -EPROTO);
1014         }
1015
1016         /* The MDS sent back the EA because we unlinked the last reference
1017          * to this file. Use this EA to unlink the objects on the OST.
1018          * It's opaque so we don't swab here; we leave it to obd_unpackmd() to
1019          * check it is complete and sensible. */
1020         eadata = req_capsule_server_sized_get(&request->rq_pill, &RMF_MDT_MD,
1021                                               body->eadatasize);
1022         LASSERT(eadata != NULL);
1023
1024         rc = obd_unpackmd(ll_i2dtexp(dir), &lsm, eadata, body->eadatasize);
1025         if (rc < 0) {
1026                 CERROR("obd_unpackmd: %d\n", rc);
1027                 GOTO(out, rc);
1028         }
1029         LASSERT(rc >= sizeof(*lsm));
1030
1031         rc = obd_checkmd(ll_i2dtexp(dir), ll_i2mdexp(dir), lsm);
1032         if (rc)
1033                 GOTO(out_free_memmd, rc);
1034
1035         OBDO_ALLOC(oa);
1036         if (oa == NULL)
1037                 GOTO(out_free_memmd, rc = -ENOMEM);
1038
1039         oa->o_id = lsm->lsm_object_id;
1040         oa->o_gr = lsm->lsm_object_gr;
1041         oa->o_mode = body->mode & S_IFMT;
1042         oa->o_valid = OBD_MD_FLID | OBD_MD_FLTYPE | OBD_MD_FLGROUP;
1043
1044         if (body->valid & OBD_MD_FLCOOKIE) {
1045                 oa->o_valid |= OBD_MD_FLCOOKIE;
1046                 oti.oti_logcookies = 
1047                         req_capsule_server_sized_get(&request->rq_pill,
1048                                                      &RMF_LOGCOOKIES,
1049                                                    sizeof(struct llog_cookie) *
1050                                                      lsm->lsm_stripe_count);
1051                 if (oti.oti_logcookies == NULL) {
1052                         oa->o_valid &= ~OBD_MD_FLCOOKIE;
1053                         body->valid &= ~OBD_MD_FLCOOKIE;
1054                 }
1055         }
1056
1057         rc = obd_destroy(ll_i2dtexp(dir), oa, lsm, &oti, ll_i2mdexp(dir));
1058         OBDO_FREE(oa);
1059         if (rc)
1060                 CERROR("obd destroy objid "LPX64" error %d\n",
1061                        lsm->lsm_object_id, rc);
1062  out_free_memmd:
1063         obd_free_memmd(ll_i2dtexp(dir), &lsm);
1064  out:
1065         return rc;
1066 }
1067
1068 static int ll_unlink_generic(struct inode *dir, struct dentry *dparent,
1069                              struct dentry *dchild, struct qstr *name)
1070 {
1071         struct ptlrpc_request *request = NULL;
1072         struct md_op_data *op_data;
1073         int rc;
1074         ENTRY;
1075         CDEBUG(D_VFSTRACE, "VFS Op:name=%.*s,dir=%lu/%u(%p)\n",
1076                name->len, name->name, dir->i_ino, dir->i_generation, dir);
1077
1078         /*
1079          * XXX: unlink bind mountpoint maybe call to here,
1080          * just check it as vfs_unlink does.
1081          */
1082         if (unlikely(ll_d_mountpoint(dparent, dchild, name)))
1083                 RETURN(-EBUSY);
1084
1085         op_data = ll_prep_md_op_data(NULL, dir, NULL, name->name,
1086                                      name->len, 0, LUSTRE_OPC_ANY, NULL);
1087         if (IS_ERR(op_data))
1088                 RETURN(PTR_ERR(op_data));
1089
1090         ll_get_child_fid(dir, name, &op_data->op_fid3);
1091         rc = md_unlink(ll_i2sbi(dir)->ll_md_exp, op_data, &request);
1092         ll_finish_md_op_data(op_data);
1093         if (rc)
1094                 GOTO(out, rc);
1095
1096         ll_update_times(request, dir);
1097
1098         rc = ll_objects_destroy(request, dir);
1099  out:
1100         ptlrpc_req_finished(request);
1101         RETURN(rc);
1102 }
1103
1104 static int ll_rename_generic(struct inode *src, struct dentry *src_dparent,
1105                              struct dentry *src_dchild, struct qstr *src_name,
1106                              struct inode *tgt, struct dentry *tgt_dparent,
1107                              struct dentry *tgt_dchild, struct qstr *tgt_name)
1108 {
1109         struct ptlrpc_request *request = NULL;
1110         struct ll_sb_info *sbi = ll_i2sbi(src);
1111         struct md_op_data *op_data;
1112         int err;
1113         ENTRY;
1114         CDEBUG(D_VFSTRACE,"VFS Op:oldname=%.*s,src_dir=%lu/%u(%p),newname=%.*s,"
1115                "tgt_dir=%lu/%u(%p)\n", src_name->len, src_name->name,
1116                src->i_ino, src->i_generation, src, tgt_name->len,
1117                tgt_name->name, tgt->i_ino, tgt->i_generation, tgt);
1118
1119         if (unlikely(ll_d_mountpoint(src_dparent, src_dchild, src_name) ||
1120             ll_d_mountpoint(tgt_dparent, tgt_dchild, tgt_name)))
1121                 RETURN(-EBUSY);
1122
1123         op_data = ll_prep_md_op_data(NULL, src, tgt, NULL, 0, 0,
1124                                      LUSTRE_OPC_ANY, NULL);
1125         if (IS_ERR(op_data))
1126                 RETURN(PTR_ERR(op_data));
1127
1128         ll_get_child_fid(src, src_name, &op_data->op_fid3);
1129         ll_get_child_fid(tgt, tgt_name, &op_data->op_fid4);
1130         err = md_rename(sbi->ll_md_exp, op_data,
1131                         src_name->name, src_name->len,
1132                         tgt_name->name, tgt_name->len, &request);
1133         ll_finish_md_op_data(op_data);
1134         if (!err) {
1135                 ll_update_times(request, src);
1136                 ll_update_times(request, tgt);
1137                 err = ll_objects_destroy(request, src);
1138         }
1139
1140         ptlrpc_req_finished(request);
1141
1142         RETURN(err);
1143 }
1144
1145 #ifdef HAVE_VFS_INTENT_PATCHES
1146 static int ll_mknod_raw(struct nameidata *nd, int mode, dev_t rdev)
1147 {
1148         return ll_mknod_generic(nd->dentry->d_inode, &nd->last, mode,rdev,NULL);
1149 }
1150 static int ll_rename_raw(struct nameidata *srcnd, struct nameidata *tgtnd)
1151 {
1152         return ll_rename_generic(srcnd->dentry->d_inode, srcnd->dentry,
1153                                  NULL, &srcnd->last,
1154                                  tgtnd->dentry->d_inode, tgtnd->dentry,
1155                                  NULL, &tgtnd->last);
1156 }
1157 static int ll_link_raw(struct nameidata *srcnd, struct nameidata *tgtnd)
1158 {
1159         return ll_link_generic(srcnd->dentry->d_inode, tgtnd->dentry->d_inode,
1160                                &tgtnd->last, NULL);
1161 }
1162 static int ll_symlink_raw(struct nameidata *nd, const char *tgt)
1163 {
1164         return ll_symlink_generic(nd->dentry->d_inode, &nd->last, tgt, NULL);
1165 }
1166 static int ll_rmdir_raw(struct nameidata *nd)
1167 {
1168         return ll_rmdir_generic(nd->dentry->d_inode, nd->dentry, NULL,
1169                                 &nd->last);
1170 }
1171 static int ll_mkdir_raw(struct nameidata *nd, int mode)
1172 {
1173         return ll_mkdir_generic(nd->dentry->d_inode, &nd->last, mode, NULL);
1174 }
1175 static int ll_unlink_raw(struct nameidata *nd)
1176 {
1177         return ll_unlink_generic(nd->dentry->d_inode, nd->dentry, NULL,
1178                                  &nd->last);
1179 }
1180 #endif
1181
1182 static int ll_mknod(struct inode *dir, struct dentry *dchild, int mode,
1183                     ll_dev_t rdev)
1184 {
1185         return ll_mknod_generic(dir, &dchild->d_name, mode,
1186                                 old_encode_dev(rdev), dchild);
1187 }
1188
1189 static int ll_unlink(struct inode * dir, struct dentry *dentry)
1190 {
1191         return ll_unlink_generic(dir, NULL, dentry, &dentry->d_name);
1192 }
1193 static int ll_mkdir(struct inode *dir, struct dentry *dentry, int mode)
1194 {
1195         return ll_mkdir_generic(dir, &dentry->d_name, mode, dentry);
1196 }
1197 static int ll_rmdir(struct inode *dir, struct dentry *dentry)
1198 {
1199         return ll_rmdir_generic(dir, NULL, dentry, &dentry->d_name);
1200 }
1201 static int ll_symlink(struct inode *dir, struct dentry *dentry,
1202                       const char *oldname)
1203 {
1204         return ll_symlink_generic(dir, &dentry->d_name, oldname, dentry);
1205 }
1206 static int ll_link(struct dentry *old_dentry, struct inode *dir,
1207                    struct dentry *new_dentry)
1208 {
1209         return ll_link_generic(old_dentry->d_inode, dir, &new_dentry->d_name,
1210                                new_dentry);
1211 }
1212 static int ll_rename(struct inode *old_dir, struct dentry *old_dentry,
1213                      struct inode *new_dir, struct dentry *new_dentry)
1214 {
1215         return ll_rename_generic(old_dir, NULL,
1216                                  old_dentry, &old_dentry->d_name,
1217                                  new_dir, NULL, new_dentry,
1218                                  &new_dentry->d_name);
1219 }
1220
1221 struct inode_operations ll_dir_inode_operations = {
1222 #ifdef HAVE_VFS_INTENT_PATCHES
1223         .link_raw           = ll_link_raw,
1224         .unlink_raw         = ll_unlink_raw,
1225         .symlink_raw        = ll_symlink_raw,
1226         .mkdir_raw          = ll_mkdir_raw,
1227         .rmdir_raw          = ll_rmdir_raw,
1228         .mknod_raw          = ll_mknod_raw,
1229         .rename_raw         = ll_rename_raw,
1230         .setattr            = ll_setattr,
1231         .setattr_raw        = ll_setattr_raw,
1232 #endif
1233         .mknod              = ll_mknod,
1234         .lookup             = ll_lookup_nd,
1235         .create             = ll_create_nd,
1236         /* We need all these non-raw things for NFSD, to not patch it. */
1237         .unlink             = ll_unlink,
1238         .mkdir              = ll_mkdir,
1239         .rmdir              = ll_rmdir,
1240         .symlink            = ll_symlink,
1241         .link               = ll_link,
1242         .rename             = ll_rename,
1243         .setattr            = ll_setattr,
1244         .getattr            = ll_getattr,
1245         .permission         = ll_inode_permission,
1246         .setxattr           = ll_setxattr,
1247         .getxattr           = ll_getxattr,
1248         .listxattr          = ll_listxattr,
1249         .removexattr        = ll_removexattr,
1250 };
1251
1252 struct inode_operations ll_special_inode_operations = {
1253 #ifdef HAVE_VFS_INTENT_PATCHES
1254         .setattr_raw    = ll_setattr_raw,
1255 #endif
1256         .setattr        = ll_setattr,
1257         .getattr        = ll_getattr,
1258         .permission     = ll_inode_permission,
1259         .setxattr       = ll_setxattr,
1260         .getxattr       = ll_getxattr,
1261         .listxattr      = ll_listxattr,
1262         .removexattr    = ll_removexattr,
1263 };