Whamcloud - gitweb
a8f961d2ebd6ae74e2ef84b185a99974c61453b5
[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, 2015, Intel Corporation.
31  */
32 /*
33  * This file is part of Lustre, http://www.lustre.org/
34  * Lustre is a trademark of Sun Microsystems, Inc.
35  */
36
37 #include <linux/fs.h>
38 #include <linux/sched.h>
39 #include <linux/mm.h>
40 #include <linux/quotaops.h>
41 #include <linux/highmem.h>
42 #include <linux/pagemap.h>
43 #include <linux/security.h>
44 #include <linux/user_namespace.h>
45 #ifdef HAVE_UIDGID_HEADER
46 # include <linux/uidgid.h>
47 #endif
48
49 #define DEBUG_SUBSYSTEM S_LLITE
50
51 #include <obd_support.h>
52 #include <lustre_fid.h>
53 #include <lustre_dlm.h>
54 #include <lustre_ver.h>
55 #include "llite_internal.h"
56
57 static int ll_create_it(struct inode *dir, struct dentry *dentry,
58                         struct lookup_intent *it);
59
60 /* called from iget5_locked->find_inode() under inode_lock spinlock */
61 static int ll_test_inode(struct inode *inode, void *opaque)
62 {
63         struct ll_inode_info    *lli = ll_i2info(inode);
64         struct lustre_md        *md = opaque;
65
66         if (unlikely(!(md->body->mbo_valid & OBD_MD_FLID))) {
67                 CERROR("MDS body missing FID\n");
68                 return 0;
69         }
70
71         if (!lu_fid_eq(&lli->lli_fid, &md->body->mbo_fid1))
72                 return 0;
73
74         return 1;
75 }
76
77 static int ll_set_inode(struct inode *inode, void *opaque)
78 {
79         struct ll_inode_info *lli = ll_i2info(inode);
80         struct mdt_body *body = ((struct lustre_md *)opaque)->body;
81
82         if (unlikely(!(body->mbo_valid & OBD_MD_FLID))) {
83                 CERROR("MDS body missing FID\n");
84                 return -EINVAL;
85         }
86
87         lli->lli_fid = body->mbo_fid1;
88         if (unlikely(!(body->mbo_valid & OBD_MD_FLTYPE))) {
89                 CERROR("Can not initialize inode "DFID" without object type: "
90                        "valid = %#llx\n",
91                        PFID(&lli->lli_fid), body->mbo_valid);
92                 return -EINVAL;
93         }
94
95         inode->i_mode = (inode->i_mode & ~S_IFMT) | (body->mbo_mode & S_IFMT);
96         if (unlikely(inode->i_mode == 0)) {
97                 CERROR("Invalid inode "DFID" type\n", PFID(&lli->lli_fid));
98                 return -EINVAL;
99         }
100
101         ll_lli_init(lli);
102
103         return 0;
104 }
105
106
107 /**
108  * Get an inode by inode number(@hash), which is already instantiated by
109  * the intent lookup).
110  */
111 struct inode *ll_iget(struct super_block *sb, ino_t hash,
112                       struct lustre_md *md)
113 {
114         struct inode    *inode;
115         int             rc = 0;
116
117         ENTRY;
118
119         LASSERT(hash != 0);
120         inode = iget5_locked(sb, hash, ll_test_inode, ll_set_inode, md);
121         if (inode == NULL)
122                 RETURN(ERR_PTR(-ENOMEM));
123
124         if (inode->i_state & I_NEW) {
125                 rc = ll_read_inode2(inode, md);
126                 if (rc == 0 && S_ISREG(inode->i_mode) &&
127                     ll_i2info(inode)->lli_clob == NULL)
128                         rc = cl_file_inode_init(inode, md);
129
130                 if (rc != 0) {
131                         /* Let's clear directory lsm here, otherwise
132                          * make_bad_inode() will reset the inode mode
133                          * to regular, then ll_clear_inode will not
134                          * be able to clear lsm_md */
135                         if (S_ISDIR(inode->i_mode))
136                                 ll_dir_clear_lsm_md(inode);
137                         make_bad_inode(inode);
138                         unlock_new_inode(inode);
139                         iput(inode);
140                         inode = ERR_PTR(rc);
141                 } else {
142                         unlock_new_inode(inode);
143                 }
144         } else if (!(inode->i_state & (I_FREEING | I_CLEAR))) {
145                 rc = ll_update_inode(inode, md);
146                 CDEBUG(D_VFSTRACE, "got inode: "DFID"(%p): rc = %d\n",
147                        PFID(&md->body->mbo_fid1), inode, rc);
148                 if (rc != 0) {
149                         if (S_ISDIR(inode->i_mode))
150                                 ll_dir_clear_lsm_md(inode);
151                         iput(inode);
152                         inode = ERR_PTR(rc);
153                 }
154         }
155
156         RETURN(inode);
157 }
158
159 static void ll_invalidate_negative_children(struct inode *dir)
160 {
161         struct dentry *dentry, *tmp_subdir;
162         DECLARE_LL_D_HLIST_NODE_PTR(p);
163
164         ll_lock_dcache(dir);
165         ll_d_hlist_for_each_entry(dentry, p, &dir->i_dentry) {
166                 spin_lock(&dentry->d_lock);
167                 if (!list_empty(&dentry->d_subdirs)) {
168                         struct dentry *child;
169
170                         list_for_each_entry_safe(child, tmp_subdir,
171                                                  &dentry->d_subdirs,
172                                                  d_child) {
173                                 if (child->d_inode == NULL)
174                                         d_lustre_invalidate(child, 1);
175                         }
176                 }
177                 spin_unlock(&dentry->d_lock);
178         }
179         ll_unlock_dcache(dir);
180 }
181
182 int ll_test_inode_by_fid(struct inode *inode, void *opaque)
183 {
184         return lu_fid_eq(&ll_i2info(inode)->lli_fid, opaque);
185 }
186
187 int ll_md_blocking_ast(struct ldlm_lock *lock, struct ldlm_lock_desc *desc,
188                        void *data, int flag)
189 {
190         struct lustre_handle lockh;
191         int rc;
192         ENTRY;
193
194         switch (flag) {
195         case LDLM_CB_BLOCKING:
196                 ldlm_lock2handle(lock, &lockh);
197                 rc = ldlm_cli_cancel(&lockh, LCF_ASYNC);
198                 if (rc < 0) {
199                         CDEBUG(D_INODE, "ldlm_cli_cancel: rc = %d\n", rc);
200                         RETURN(rc);
201                 }
202                 break;
203         case LDLM_CB_CANCELING: {
204                 struct inode *inode = ll_inode_from_resource_lock(lock);
205                 __u64 bits = lock->l_policy_data.l_inodebits.bits;
206
207                 /* Inode is set to lock->l_resource->lr_lvb_inode
208                  * for mdc - bug 24555 */
209                 LASSERT(lock->l_ast_data == NULL);
210
211                 if (inode == NULL)
212                         break;
213
214                 /* Invalidate all dentries associated with this inode */
215                 LASSERT(ldlm_is_canceling(lock));
216
217                 if (!fid_res_name_eq(ll_inode2fid(inode),
218                                      &lock->l_resource->lr_name)) {
219                         LDLM_ERROR(lock, "data mismatch with object "DFID"(%p)",
220                                    PFID(ll_inode2fid(inode)), inode);
221                         LBUG();
222                 }
223
224                 if (bits & MDS_INODELOCK_XATTR) {
225                         if (S_ISDIR(inode->i_mode))
226                                 ll_i2info(inode)->lli_def_stripe_offset = -1;
227                         ll_xattr_cache_destroy(inode);
228                         bits &= ~MDS_INODELOCK_XATTR;
229                 }
230
231                 /* For OPEN locks we differentiate between lock modes
232                  * LCK_CR, LCK_CW, LCK_PR - bug 22891 */
233                 if (bits & MDS_INODELOCK_OPEN)
234                         ll_have_md_lock(inode, &bits, lock->l_req_mode);
235
236                 if (bits & MDS_INODELOCK_OPEN) {
237                         fmode_t fmode;
238
239                         switch (lock->l_req_mode) {
240                         case LCK_CW:
241                                 fmode = FMODE_WRITE;
242                                 break;
243                         case LCK_PR:
244                                 fmode = FMODE_EXEC;
245                                 break;
246                         case LCK_CR:
247                                 fmode = FMODE_READ;
248                                 break;
249                         default:
250                                 LDLM_ERROR(lock, "bad lock mode for OPEN lock");
251                                 LBUG();
252                         }
253
254                         ll_md_real_close(inode, fmode);
255
256                         bits &= ~MDS_INODELOCK_OPEN;
257                 }
258
259                 if (bits & (MDS_INODELOCK_LOOKUP | MDS_INODELOCK_UPDATE |
260                             MDS_INODELOCK_LAYOUT | MDS_INODELOCK_PERM))
261                         ll_have_md_lock(inode, &bits, LCK_MINMODE);
262
263                 if (bits & MDS_INODELOCK_LAYOUT) {
264                         struct cl_object_conf conf = {
265                                 .coc_opc = OBJECT_CONF_INVALIDATE,
266                                 .coc_inode = inode,
267                         };
268
269                         rc = ll_layout_conf(inode, &conf);
270                         if (rc < 0)
271                                 CDEBUG(D_INODE, "cannot invalidate layout of "
272                                        DFID": rc = %d\n",
273                                        PFID(ll_inode2fid(inode)), rc);
274                 }
275
276                 if (bits & MDS_INODELOCK_UPDATE) {
277                         struct ll_inode_info *lli = ll_i2info(inode);
278
279                         spin_lock(&lli->lli_lock);
280                         LTIME_S(inode->i_mtime) = 0;
281                         LTIME_S(inode->i_atime) = 0;
282                         LTIME_S(inode->i_ctime) = 0;
283                         spin_unlock(&lli->lli_lock);
284                 }
285
286                 if ((bits & MDS_INODELOCK_UPDATE) && S_ISDIR(inode->i_mode)) {
287                         struct ll_inode_info *lli = ll_i2info(inode);
288
289                         CDEBUG(D_INODE, "invalidating inode "DFID" lli = %p, "
290                                "pfid  = "DFID"\n", PFID(ll_inode2fid(inode)),
291                                lli, PFID(&lli->lli_pfid));
292                         truncate_inode_pages(inode->i_mapping, 0);
293
294                         if (unlikely(!fid_is_zero(&lli->lli_pfid))) {
295                                 struct inode *master_inode = NULL;
296                                 unsigned long hash;
297
298                                 /* This is slave inode, since all of the child
299                                  * dentry is connected on the master inode, so
300                                  * we have to invalidate the negative children
301                                  * on master inode */
302                                 CDEBUG(D_INODE, "Invalidate s"DFID" m"DFID"\n",
303                                        PFID(ll_inode2fid(inode)),
304                                        PFID(&lli->lli_pfid));
305
306                                 hash = cl_fid_build_ino(&lli->lli_pfid,
307                                         ll_need_32bit_api(ll_i2sbi(inode)));
308
309                                 /* Do not lookup the inode with ilookup5,
310                                  * otherwise it will cause dead lock,
311                                  *
312                                  * 1. Client1 send chmod req to the MDT0, then
313                                  * on MDT0, it enqueues master and all of its
314                                  * slaves lock, (mdt_attr_set() ->
315                                  * mdt_lock_slaves()), after gets master and
316                                  * stripe0 lock, it will send the enqueue req
317                                  * (for stripe1) to MDT1, then MDT1 finds the
318                                  * lock has been granted to client2. Then MDT1
319                                  * sends blocking ast to client2.
320                                  *
321                                  * 2. At the same time, client2 tries to unlink
322                                  * the striped dir (rm -rf striped_dir), and
323                                  * during lookup, it will hold the master inode
324                                  * of the striped directory, whose inode state
325                                  * is NEW, then tries to revalidate all of its
326                                  * slaves, (ll_prep_inode()->ll_iget()->
327                                  * ll_read_inode2()-> ll_update_inode().). And
328                                  * it will be blocked on the server side because
329                                  * of 1.
330                                  *
331                                  * 3. Then the client get the blocking_ast req,
332                                  * cancel the lock, but being blocked if using
333                                  * ->ilookup5()), because master inode state is
334                                  *  NEW. */
335                                 master_inode = ilookup5_nowait(inode->i_sb,
336                                                     hash, ll_test_inode_by_fid,
337                                                         (void *)&lli->lli_pfid);
338                                 if (master_inode != NULL &&
339                                         !IS_ERR(master_inode)) {
340                                         ll_invalidate_negative_children(
341                                                                 master_inode);
342                                         iput(master_inode);
343                                 }
344                         } else {
345                                 ll_invalidate_negative_children(inode);
346                         }
347                 }
348
349                 if ((bits & (MDS_INODELOCK_LOOKUP | MDS_INODELOCK_PERM)) &&
350                     inode->i_sb->s_root != NULL &&
351                     inode != inode->i_sb->s_root->d_inode)
352                         ll_invalidate_aliases(inode);
353
354                 iput(inode);
355                 break;
356         }
357         default:
358                 LBUG();
359         }
360
361         RETURN(0);
362 }
363
364 __u32 ll_i2suppgid(struct inode *i)
365 {
366         if (in_group_p(i->i_gid))
367                 return (__u32)from_kgid(&init_user_ns, i->i_gid);
368         else
369                 return (__u32) __kgid_val(INVALID_GID);
370 }
371
372 /* Pack the required supplementary groups into the supplied groups array.
373  * If we don't need to use the groups from the target inode(s) then we
374  * instead pack one or more groups from the user's supplementary group
375  * array in case it might be useful.  Not needed if doing an MDS-side upcall. */
376 void ll_i2gids(__u32 *suppgids, struct inode *i1, struct inode *i2)
377 {
378         LASSERT(i1 != NULL);
379         LASSERT(suppgids != NULL);
380
381         suppgids[0] = ll_i2suppgid(i1);
382
383         if (i2)
384                 suppgids[1] = ll_i2suppgid(i2);
385         else
386                 suppgids[1] = -1;
387 }
388
389 /*
390  * try to reuse three types of dentry:
391  * 1. unhashed alias, this one is unhashed by d_invalidate (but it may be valid
392  *    by concurrent .revalidate).
393  * 2. INVALID alias (common case for no valid ldlm lock held, but this flag may
394  *    be cleared by others calling d_lustre_revalidate).
395  * 3. DISCONNECTED alias.
396  */
397 static struct dentry *ll_find_alias(struct inode *inode, struct dentry *dentry)
398 {
399         struct dentry *alias, *discon_alias, *invalid_alias;
400         DECLARE_LL_D_HLIST_NODE_PTR(p);
401
402         if (ll_d_hlist_empty(&inode->i_dentry))
403                 return NULL;
404
405         discon_alias = invalid_alias = NULL;
406
407         ll_lock_dcache(inode);
408         ll_d_hlist_for_each_entry(alias, p, &inode->i_dentry) {
409                 LASSERT(alias != dentry);
410
411                 spin_lock(&alias->d_lock);
412                 if ((alias->d_flags & DCACHE_DISCONNECTED) &&
413                     S_ISDIR(inode->i_mode))
414                         /* LASSERT(last_discon == NULL); LU-405, bz 20055 */
415                         discon_alias = alias;
416                 else if (alias->d_parent == dentry->d_parent             &&
417                          alias->d_name.hash == dentry->d_name.hash       &&
418                          alias->d_name.len == dentry->d_name.len         &&
419                          memcmp(alias->d_name.name, dentry->d_name.name,
420                                 dentry->d_name.len) == 0)
421                         invalid_alias = alias;
422                 spin_unlock(&alias->d_lock);
423
424                 if (invalid_alias)
425                         break;
426         }
427         alias = invalid_alias ?: discon_alias ?: NULL;
428         if (alias) {
429                 spin_lock(&alias->d_lock);
430                 dget_dlock(alias);
431                 spin_unlock(&alias->d_lock);
432         }
433         ll_unlock_dcache(inode);
434
435         return alias;
436 }
437
438 /*
439  * Similar to d_splice_alias(), but lustre treats invalid alias
440  * similar to DCACHE_DISCONNECTED, and tries to use it anyway.
441  */
442 struct dentry *ll_splice_alias(struct inode *inode, struct dentry *de)
443 {
444         struct dentry *new;
445         int rc;
446
447         if (inode) {
448                 new = ll_find_alias(inode, de);
449                 if (new) {
450                         rc = ll_d_init(new);
451                         if (rc < 0) {
452                                 dput(new);
453                                 return ERR_PTR(rc);
454                         }
455                         d_move(new, de);
456                         iput(inode);
457                         CDEBUG(D_DENTRY,
458                                "Reuse dentry %p inode %p refc %d flags %#x\n",
459                               new, new->d_inode, ll_d_count(new), new->d_flags);
460                         return new;
461                 }
462         }
463         rc = ll_d_init(de);
464         if (rc < 0)
465                 return ERR_PTR(rc);
466         d_add(de, inode);
467         CDEBUG(D_DENTRY, "Add dentry %p inode %p refc %d flags %#x\n",
468                de, de->d_inode, ll_d_count(de), de->d_flags);
469         return de;
470 }
471
472 static int ll_lookup_it_finish(struct ptlrpc_request *request,
473                                struct lookup_intent *it,
474                                struct inode *parent, struct dentry **de)
475 {
476         struct inode             *inode = NULL;
477         __u64                     bits = 0;
478         int                       rc;
479         struct dentry *alias;
480         ENTRY;
481
482         /* NB 1 request reference will be taken away by ll_intent_lock()
483          * when I return */
484         CDEBUG(D_DENTRY, "it %p it_disposition %x\n", it,
485                it->it_disposition);
486         if (!it_disposition(it, DISP_LOOKUP_NEG)) {
487                 rc = ll_prep_inode(&inode, request, (*de)->d_sb, it);
488                 if (rc)
489                         RETURN(rc);
490
491                 ll_set_lock_data(ll_i2sbi(parent)->ll_md_exp, inode, it, &bits);
492
493                 /* We used to query real size from OSTs here, but actually
494                    this is not needed. For stat() calls size would be updated
495                    from subsequent do_revalidate()->ll_inode_revalidate_it() in
496                    2.4 and
497                    vfs_getattr_it->ll_getattr()->ll_inode_revalidate_it() in 2.6
498                    Everybody else who needs correct file size would call
499                    ll_glimpse_size or some equivalent themselves anyway.
500                    Also see bug 7198. */
501         }
502
503         /* Only hash *de if it is unhashed (new dentry).
504          * Atoimc_open may passin hashed dentries for open.
505          */
506         alias = ll_splice_alias(inode, *de);
507         if (IS_ERR(alias))
508                 GOTO(out, rc = PTR_ERR(alias));
509
510         *de = alias;
511
512         if (!it_disposition(it, DISP_LOOKUP_NEG)) {
513                 /* we have lookup look - unhide dentry */
514                 if (bits & MDS_INODELOCK_LOOKUP)
515                         d_lustre_revalidate(*de);
516         } else if (!it_disposition(it, DISP_OPEN_CREATE)) {
517                 /* If file created on server, don't depend on parent UPDATE
518                  * lock to unhide it. It is left hidden and next lookup can
519                  * find it in ll_splice_alias.
520                  */
521                 /* Check that parent has UPDATE lock. */
522                 struct lookup_intent parent_it = {
523                                         .it_op = IT_GETATTR,
524                                         .it_lock_handle = 0 };
525                 struct lu_fid   fid = ll_i2info(parent)->lli_fid;
526
527                 /* If it is striped directory, get the real stripe parent */
528                 if (unlikely(ll_i2info(parent)->lli_lsm_md != NULL)) {
529                         rc = md_get_fid_from_lsm(ll_i2mdexp(parent),
530                                                  ll_i2info(parent)->lli_lsm_md,
531                                                  (*de)->d_name.name,
532                                                  (*de)->d_name.len, &fid);
533                         if (rc != 0)
534                                 GOTO(out, rc);
535                 }
536
537                 if (md_revalidate_lock(ll_i2mdexp(parent), &parent_it, &fid,
538                                        NULL)) {
539                         d_lustre_revalidate(*de);
540                         ll_intent_release(&parent_it);
541                 }
542         }
543
544         GOTO(out, rc = 0);
545
546 out:
547         if (rc != 0 && it->it_op & IT_OPEN)
548                 ll_open_cleanup((*de)->d_sb, request);
549
550         return rc;
551 }
552
553 static struct dentry *ll_lookup_it(struct inode *parent, struct dentry *dentry,
554                                    struct lookup_intent *it)
555 {
556         struct lookup_intent lookup_it = { .it_op = IT_LOOKUP };
557         struct dentry *save = dentry, *retval;
558         struct ptlrpc_request *req = NULL;
559         struct md_op_data *op_data = NULL;
560         __u32 opc;
561         int rc;
562         ENTRY;
563
564         if (dentry->d_name.len > ll_i2sbi(parent)->ll_namelen)
565                 RETURN(ERR_PTR(-ENAMETOOLONG));
566
567         CDEBUG(D_VFSTRACE, "VFS Op:name=%.*s, dir="DFID"(%p), intent=%s\n",
568                dentry->d_name.len, dentry->d_name.name,
569                PFID(ll_inode2fid(parent)), parent, LL_IT2STR(it));
570
571         if (d_mountpoint(dentry))
572                 CERROR("Tell Peter, lookup on mtpt, it %s\n", LL_IT2STR(it));
573
574         if (it == NULL || it->it_op == IT_GETXATTR)
575                 it = &lookup_it;
576
577         if (it->it_op == IT_GETATTR && dentry_may_statahead(parent, dentry)) {
578                 rc = ll_statahead(parent, &dentry, 0);
579                 if (rc == 1)
580                         RETURN(dentry == save ? NULL : dentry);
581         }
582
583         if (it->it_op & IT_OPEN && it->it_flags & FMODE_WRITE &&
584             dentry->d_sb->s_flags & MS_RDONLY)
585                 RETURN(ERR_PTR(-EROFS));
586
587         if (it->it_op & IT_CREAT)
588                 opc = LUSTRE_OPC_CREATE;
589         else
590                 opc = LUSTRE_OPC_ANY;
591
592         op_data = ll_prep_md_op_data(NULL, parent, NULL, dentry->d_name.name,
593                                      dentry->d_name.len, 0, opc, NULL);
594         if (IS_ERR(op_data))
595                 GOTO(out, retval = ERR_CAST(op_data));
596
597         /* enforce umask if acl disabled or MDS doesn't support umask */
598         if (!IS_POSIXACL(parent) || !exp_connect_umask(ll_i2mdexp(parent)))
599                 it->it_create_mode &= ~current_umask();
600
601         if (it->it_op & IT_CREAT &&
602             ll_i2sbi(parent)->ll_flags & LL_SBI_FILE_SECCTX) {
603                 rc = ll_dentry_init_security(dentry, it->it_create_mode,
604                                              &dentry->d_name,
605                                              &op_data->op_file_secctx_name,
606                                              &op_data->op_file_secctx,
607                                              &op_data->op_file_secctx_size);
608                 if (rc < 0)
609                         GOTO(out, retval = ERR_PTR(rc));
610         }
611
612         rc = md_intent_lock(ll_i2mdexp(parent), op_data, it, &req,
613                             &ll_md_blocking_ast, 0);
614         /* If the MDS allows the client to chgrp (CFS_SETGRP_PERM), but the
615          * client does not know which suppgid should be sent to the MDS, or
616          * some other(s) changed the target file's GID after this RPC sent
617          * to the MDS with the suppgid as the original GID, then we should
618          * try again with right suppgid. */
619         if (rc == -EACCES && it->it_op & IT_OPEN &&
620             it_disposition(it, DISP_OPEN_DENY)) {
621                 struct mdt_body *body;
622
623                 LASSERT(req != NULL);
624
625                 body = req_capsule_server_get(&req->rq_pill, &RMF_MDT_BODY);
626                 if (op_data->op_suppgids[0] == body->mbo_gid ||
627                     op_data->op_suppgids[1] == body->mbo_gid ||
628                     !in_group_p(make_kgid(&init_user_ns, body->mbo_gid)))
629                         GOTO(out, retval = ERR_PTR(-EACCES));
630
631                 fid_zero(&op_data->op_fid2);
632                 op_data->op_suppgids[1] = body->mbo_gid;
633                 ptlrpc_req_finished(req);
634                 req = NULL;
635                 ll_intent_release(it);
636                 rc = md_intent_lock(ll_i2mdexp(parent), op_data, it, &req,
637                                     &ll_md_blocking_ast, 0);
638         }
639
640         if (rc < 0)
641                 GOTO(out, retval = ERR_PTR(rc));
642
643         rc = ll_lookup_it_finish(req, it, parent, &dentry);
644         if (rc != 0) {
645                 ll_intent_release(it);
646                 GOTO(out, retval = ERR_PTR(rc));
647         }
648
649         if ((it->it_op & IT_OPEN) && dentry->d_inode &&
650             !S_ISREG(dentry->d_inode->i_mode) &&
651             !S_ISDIR(dentry->d_inode->i_mode)) {
652                 ll_release_openhandle(dentry, it);
653         }
654         ll_lookup_finish_locks(it, dentry);
655
656         GOTO(out, retval = (dentry == save) ? NULL : dentry);
657
658 out:
659         if (op_data != NULL && !IS_ERR(op_data))
660                 ll_finish_md_op_data(op_data);
661
662         ptlrpc_req_finished(req);
663         return retval;
664 }
665
666 #ifdef HAVE_IOP_ATOMIC_OPEN
667 static struct dentry *ll_lookup_nd(struct inode *parent, struct dentry *dentry,
668                                    unsigned int flags)
669 {
670         struct lookup_intent *itp, it = { .it_op = IT_GETATTR };
671         struct dentry *de;
672
673         CDEBUG(D_VFSTRACE, "VFS Op:name=%.*s, dir="DFID"(%p), flags=%u\n",
674                dentry->d_name.len, dentry->d_name.name,
675                PFID(ll_inode2fid(parent)), parent, flags);
676
677         /* Optimize away (CREATE && !OPEN). Let .create handle the race. */
678         if ((flags & LOOKUP_CREATE) && !(flags & LOOKUP_OPEN))
679                 return NULL;
680
681         if (flags & (LOOKUP_PARENT|LOOKUP_OPEN|LOOKUP_CREATE))
682                 itp = NULL;
683         else
684                 itp = &it;
685         de = ll_lookup_it(parent, dentry, itp);
686
687         if (itp != NULL)
688                 ll_intent_release(itp);
689
690         return de;
691 }
692
693 /*
694  * For cached negative dentry and new dentry, handle lookup/create/open
695  * together.
696  */
697 static int ll_atomic_open(struct inode *dir, struct dentry *dentry,
698                           struct file *file, unsigned open_flags,
699                           umode_t mode, int *opened)
700 {
701         struct lookup_intent *it;
702         struct dentry *de;
703         long long lookup_flags = LOOKUP_OPEN;
704         int rc = 0;
705         ENTRY;
706
707         CDEBUG(D_VFSTRACE, "VFS Op:name=%.*s, dir="DFID"(%p), file %p,"
708                            "open_flags %x, mode %x opened %d\n",
709                dentry->d_name.len, dentry->d_name.name,
710                PFID(ll_inode2fid(dir)), dir, file, open_flags, mode, *opened);
711
712         /* Only negative dentries enter here */
713         LASSERT(dentry->d_inode == NULL);
714
715         if (!d_unhashed(dentry)) {
716                 /* A valid negative dentry that just passed revalidation,
717                  * there's little point to try and open it server-side,
718                  * even though there's a minuscule chance it might succeed.
719                  * Either way it's a valid race to just return -ENOENT here.
720                  */
721                 if (!(open_flags & O_CREAT))
722                         return -ENOENT;
723
724                 /* Otherwise we just unhash it to be rehashed afresh via
725                  * lookup if necessary
726                  */
727                 d_drop(dentry);
728         }
729
730         OBD_ALLOC(it, sizeof(*it));
731         if (!it)
732                 RETURN(-ENOMEM);
733
734         it->it_op = IT_OPEN;
735         if (open_flags & O_CREAT) {
736                 it->it_op |= IT_CREAT;
737                 lookup_flags |= LOOKUP_CREATE;
738         }
739         it->it_create_mode = (mode & S_IALLUGO) | S_IFREG;
740         it->it_flags = (open_flags & ~O_ACCMODE) | OPEN_FMODE(open_flags);
741         it->it_flags &= ~MDS_OPEN_FL_INTERNAL;
742
743         /* Dentry added to dcache tree in ll_lookup_it */
744         de = ll_lookup_it(dir, dentry, it);
745         if (IS_ERR(de))
746                 rc = PTR_ERR(de);
747         else if (de != NULL)
748                 dentry = de;
749
750         CFS_FAIL_TIMEOUT(OBD_FAIL_LLITE_CREATE_FILE_PAUSE, cfs_fail_val);
751
752         if (!rc) {
753                 if (it_disposition(it, DISP_OPEN_CREATE)) {
754                         /* Dentry instantiated in ll_create_it. */
755                         rc = ll_create_it(dir, dentry, it);
756                         if (rc) {
757                                 /* We dget in ll_splice_alias. */
758                                 if (de != NULL)
759                                         dput(de);
760                                 goto out_release;
761                         }
762
763                         *opened |= FILE_CREATED;
764                 }
765                 if (dentry->d_inode && it_disposition(it, DISP_OPEN_OPEN)) {
766                         /* Open dentry. */
767                         if (S_ISFIFO(dentry->d_inode->i_mode)) {
768                                 /* We cannot call open here as it might
769                                  * deadlock. This case is unreachable in
770                                  * practice because of OBD_CONNECT_NODEVOH. */
771                                 rc = finish_no_open(file, de);
772                         } else {
773                                 file->private_data = it;
774                                 rc = finish_open(file, dentry, NULL, opened);
775                                 /* We dget in ll_splice_alias. finish_open takes
776                                  * care of dget for fd open.
777                                  */
778                                 if (de != NULL)
779                                         dput(de);
780                         }
781                 } else {
782                         rc = finish_no_open(file, de);
783                 }
784         }
785
786 out_release:
787         ll_intent_release(it);
788         OBD_FREE(it, sizeof(*it));
789
790         RETURN(rc);
791 }
792
793 #else /* !HAVE_IOP_ATOMIC_OPEN */
794 static struct lookup_intent *
795 ll_convert_intent(struct open_intent *oit, int lookup_flags)
796 {
797         struct lookup_intent *it;
798
799         OBD_ALLOC_PTR(it);
800         if (!it)
801                 return ERR_PTR(-ENOMEM);
802
803         if (lookup_flags & LOOKUP_OPEN) {
804                 it->it_op = IT_OPEN;
805                 if (lookup_flags & LOOKUP_CREATE)
806                         it->it_op |= IT_CREAT;
807                 it->it_create_mode = (oit->create_mode & S_IALLUGO) | S_IFREG;
808                 it->it_flags = ll_namei_to_lookup_intent_flag(oit->flags);
809                 it->it_flags &= ~MDS_OPEN_FL_INTERNAL;
810         } else {
811                 it->it_op = IT_GETATTR;
812         }
813
814         return it;
815 }
816
817 static struct dentry *ll_lookup_nd(struct inode *parent, struct dentry *dentry,
818                                    struct nameidata *nd)
819 {
820         struct dentry *de;
821         ENTRY;
822
823         if (nd && !(nd->flags & (LOOKUP_CONTINUE|LOOKUP_PARENT))) {
824                 struct lookup_intent *it;
825
826                 if (ll_d2d(dentry) && ll_d2d(dentry)->lld_it) {
827                         it = ll_d2d(dentry)->lld_it;
828                         ll_d2d(dentry)->lld_it = NULL;
829                 } else {
830                         if ((nd->flags & LOOKUP_CREATE) &&
831                             !(nd->flags & LOOKUP_OPEN))
832                                 RETURN(NULL);
833
834                         it = ll_convert_intent(&nd->intent.open, nd->flags);
835                         if (IS_ERR(it))
836                                 RETURN((struct dentry *)it);
837                 }
838
839                 de = ll_lookup_it(parent, dentry, it);
840                 if (de)
841                         dentry = de;
842                 if ((nd->flags & LOOKUP_OPEN) && !IS_ERR(dentry)) { /* Open */
843                         if (dentry->d_inode &&
844                             it_disposition(it, DISP_OPEN_OPEN)) { /* nocreate */
845                                 if (S_ISFIFO(dentry->d_inode->i_mode)) {
846                                         /* We cannot call open here as it might
847                                          * deadlock. This case is unreachable in
848                                          * practice because of
849                                          * OBD_CONNECT_NODEVOH. */
850                                 } else {
851                                         struct file *filp;
852
853                                         nd->intent.open.file->private_data = it;
854                                         filp = lookup_instantiate_filp(nd,
855                                                                        dentry,
856                                                                        NULL);
857                                         if (IS_ERR(filp)) {
858                                                 if (de)
859                                                         dput(de);
860                                                 de = (struct dentry *)filp;
861                                         }
862                                 }
863                         } else if (it_disposition(it, DISP_OPEN_CREATE)) {
864                                 // XXX This can only reliably work on assumption
865                                 // that there are NO hashed negative dentries.
866                                 ll_d2d(dentry)->lld_it = it;
867                                 it = NULL; /* Will be freed in ll_create_nd */
868                                 /* We absolutely depend on ll_create_nd to be
869                                  * called to not leak this intent and possible
870                                  * data attached to it */
871                         }
872                 }
873
874                 if (it) {
875                         ll_intent_release(it);
876                         OBD_FREE(it, sizeof(*it));
877                 }
878         } else {
879                 de = ll_lookup_it(parent, dentry, NULL);
880         }
881
882         RETURN(de);
883 }
884 #endif /* HAVE_IOP_ATOMIC_OPEN */
885
886 /* We depend on "mode" being set with the proper file type/umask by now */
887 static struct inode *ll_create_node(struct inode *dir, struct lookup_intent *it)
888 {
889         struct inode *inode = NULL;
890         struct ptlrpc_request *request = NULL;
891         struct ll_sb_info *sbi = ll_i2sbi(dir);
892         int rc;
893         ENTRY;
894
895         LASSERT(it && it->it_disposition);
896
897         LASSERT(it_disposition(it, DISP_ENQ_CREATE_REF));
898         request = it->it_request;
899         it_clear_disposition(it, DISP_ENQ_CREATE_REF);
900         rc = ll_prep_inode(&inode, request, dir->i_sb, it);
901         if (rc)
902                 GOTO(out, inode = ERR_PTR(rc));
903
904         LASSERT(ll_d_hlist_empty(&inode->i_dentry));
905
906         /* We asked for a lock on the directory, but were granted a
907          * lock on the inode.  Since we finally have an inode pointer,
908          * stuff it in the lock. */
909         CDEBUG(D_DLMTRACE, "setting l_ast_data to inode "DFID"(%p)\n",
910                PFID(ll_inode2fid(inode)), inode);
911         ll_set_lock_data(sbi->ll_md_exp, inode, it, NULL);
912         EXIT;
913  out:
914         ptlrpc_req_finished(request);
915         return inode;
916 }
917
918 /*
919  * By the time this is called, we already have created the directory cache
920  * entry for the new file, but it is so far negative - it has no inode.
921  *
922  * We defer creating the OBD object(s) until open, to keep the intent and
923  * non-intent code paths similar, and also because we do not have the MDS
924  * inode number before calling ll_create_node() (which is needed for LOV),
925  * so we would need to do yet another RPC to the MDS to store the LOV EA
926  * data on the MDS.  If needed, we would pass the PACKED lmm as data and
927  * lmm_size in datalen (the MDS still has code which will handle that).
928  *
929  * If the create succeeds, we fill in the inode information
930  * with d_instantiate().
931  */
932 static int ll_create_it(struct inode *dir, struct dentry *dentry,
933                         struct lookup_intent *it)
934 {
935         struct inode *inode;
936         int rc = 0;
937         ENTRY;
938
939         CDEBUG(D_VFSTRACE, "VFS Op:name=%.*s, dir="DFID"(%p), intent=%s\n",
940                dentry->d_name.len, dentry->d_name.name,
941                PFID(ll_inode2fid(dir)), dir, LL_IT2STR(it));
942
943         rc = it_open_error(DISP_OPEN_CREATE, it);
944         if (rc)
945                 RETURN(rc);
946
947         inode = ll_create_node(dir, it);
948         if (IS_ERR(inode))
949                 RETURN(PTR_ERR(inode));
950
951         d_instantiate(dentry, inode);
952
953         if (!(ll_i2sbi(inode)->ll_flags & LL_SBI_FILE_SECCTX)) {
954                 rc = ll_inode_init_security(dentry, inode, dir);
955                 if (rc)
956                         RETURN(rc);
957         }
958
959         RETURN(0);
960 }
961
962 void ll_update_times(struct ptlrpc_request *request, struct inode *inode)
963 {
964         struct mdt_body *body = req_capsule_server_get(&request->rq_pill,
965                                                        &RMF_MDT_BODY);
966
967         LASSERT(body);
968         if (body->mbo_valid & OBD_MD_FLMTIME &&
969             body->mbo_mtime > LTIME_S(inode->i_mtime)) {
970                 CDEBUG(D_INODE, "setting fid "DFID" mtime from %lu to %llu"
971                        "\n", PFID(ll_inode2fid(inode)),
972                        LTIME_S(inode->i_mtime), body->mbo_mtime);
973                 LTIME_S(inode->i_mtime) = body->mbo_mtime;
974         }
975
976         if (body->mbo_valid & OBD_MD_FLCTIME &&
977             body->mbo_ctime > LTIME_S(inode->i_ctime))
978                 LTIME_S(inode->i_ctime) = body->mbo_ctime;
979 }
980
981 static int ll_new_node(struct inode *dir, struct dentry *dchild,
982                        const char *tgt, umode_t mode, int rdev, __u32 opc)
983 {
984         struct qstr *name = &dchild->d_name;
985         struct ptlrpc_request *request = NULL;
986         struct md_op_data *op_data;
987         struct inode *inode = NULL;
988         struct ll_sb_info *sbi = ll_i2sbi(dir);
989         int tgt_len = 0;
990         int err;
991
992         ENTRY;
993         if (unlikely(tgt != NULL))
994                 tgt_len = strlen(tgt) + 1;
995
996 again:
997         op_data = ll_prep_md_op_data(NULL, dir, NULL, name->name,
998                                      name->len, 0, opc, NULL);
999         if (IS_ERR(op_data))
1000                 GOTO(err_exit, err = PTR_ERR(op_data));
1001
1002         if (sbi->ll_flags & LL_SBI_FILE_SECCTX) {
1003                 err = ll_dentry_init_security(dchild, mode, &dchild->d_name,
1004                                               &op_data->op_file_secctx_name,
1005                                               &op_data->op_file_secctx,
1006                                               &op_data->op_file_secctx_size);
1007                 if (err < 0)
1008                         GOTO(err_exit, err);
1009         }
1010
1011         err = md_create(sbi->ll_md_exp, op_data, tgt, tgt_len, mode,
1012                         from_kuid(&init_user_ns, current_fsuid()),
1013                         from_kgid(&init_user_ns, current_fsgid()),
1014                         cfs_curproc_cap_pack(), rdev, &request);
1015         ll_finish_md_op_data(op_data);
1016         op_data = NULL;
1017         if (err < 0 && err != -EREMOTE)
1018                 GOTO(err_exit, err);
1019
1020         /* If the client doesn't know where to create a subdirectory (or
1021          * in case of a race that sends the RPC to the wrong MDS), the
1022          * MDS will return -EREMOTE and the client will fetch the layout
1023          * of the directory, then create the directory on the right MDT. */
1024         if (unlikely(err == -EREMOTE)) {
1025                 struct ll_inode_info    *lli = ll_i2info(dir);
1026                 struct lmv_user_md      *lum;
1027                 int                     lumsize;
1028                 int                     err2;
1029
1030                 ptlrpc_req_finished(request);
1031                 request = NULL;
1032
1033                 err2 = ll_dir_getstripe(dir, (void **)&lum, &lumsize, &request,
1034                                         OBD_MD_DEFAULT_MEA);
1035                 if (err2 == 0) {
1036                         /* Update stripe_offset and retry */
1037                         lli->lli_def_stripe_offset = lum->lum_stripe_offset;
1038                 } else if (err2 == -ENODATA &&
1039                            lli->lli_def_stripe_offset != -1) {
1040                         /* If there are no default stripe EA on the MDT, but the
1041                          * client has default stripe, then it probably means
1042                          * default stripe EA has just been deleted. */
1043                         lli->lli_def_stripe_offset = -1;
1044                 } else {
1045                         GOTO(err_exit, err);
1046                 }
1047
1048                 ptlrpc_req_finished(request);
1049                 request = NULL;
1050                 goto again;
1051         }
1052
1053         ll_update_times(request, dir);
1054
1055         CFS_FAIL_TIMEOUT(OBD_FAIL_LLITE_NEWNODE_PAUSE, cfs_fail_val);
1056
1057         err = ll_prep_inode(&inode, request, dchild->d_sb, NULL);
1058         if (err)
1059                 GOTO(err_exit, err);
1060
1061         d_instantiate(dchild, inode);
1062
1063         if (!(sbi->ll_flags & LL_SBI_FILE_SECCTX)) {
1064                 err = ll_inode_init_security(dchild, inode, dir);
1065                 if (err)
1066                         GOTO(err_exit, err);
1067         }
1068
1069         EXIT;
1070 err_exit:
1071         if (request != NULL)
1072                 ptlrpc_req_finished(request);
1073
1074         if (!IS_ERR_OR_NULL(op_data))
1075                 ll_finish_md_op_data(op_data);
1076
1077         return err;
1078 }
1079
1080 static int ll_mknod(struct inode *dir, struct dentry *dchild, ll_umode_t mode,
1081                     dev_t rdev)
1082 {
1083         struct qstr *name = &dchild->d_name;
1084         int err;
1085         ENTRY;
1086
1087         CDEBUG(D_VFSTRACE, "VFS Op:name=%.*s, dir="DFID"(%p) mode %o dev %x\n",
1088                name->len, name->name, PFID(ll_inode2fid(dir)), dir,
1089                mode, rdev);
1090
1091         if (!IS_POSIXACL(dir) || !exp_connect_umask(ll_i2mdexp(dir)))
1092                 mode &= ~current_umask();
1093
1094         switch (mode & S_IFMT) {
1095         case 0:
1096                 mode |= S_IFREG; /* for mode = 0 case, fallthrough */
1097         case S_IFREG:
1098         case S_IFCHR:
1099         case S_IFBLK:
1100         case S_IFIFO:
1101         case S_IFSOCK:
1102                 err = ll_new_node(dir, dchild, NULL, mode, old_encode_dev(rdev),
1103                                   LUSTRE_OPC_MKNOD);
1104                 break;
1105         case S_IFDIR:
1106                 err = -EPERM;
1107                 break;
1108         default:
1109                 err = -EINVAL;
1110         }
1111
1112         if (!err)
1113                 ll_stats_ops_tally(ll_i2sbi(dir), LPROC_LL_MKNOD, 1);
1114
1115         RETURN(err);
1116 }
1117
1118 #ifdef HAVE_IOP_ATOMIC_OPEN
1119 /*
1120  * Plain create. Intent create is handled in atomic_open.
1121  */
1122 static int ll_create_nd(struct inode *dir, struct dentry *dentry,
1123                         umode_t mode, bool want_excl)
1124 {
1125         int rc;
1126
1127         CFS_FAIL_TIMEOUT(OBD_FAIL_LLITE_CREATE_FILE_PAUSE, cfs_fail_val);
1128
1129         CDEBUG(D_VFSTRACE, "VFS Op:name=%.*s, dir="DFID"(%p), "
1130                            "flags=%u, excl=%d\n", dentry->d_name.len,
1131                dentry->d_name.name, PFID(ll_inode2fid(dir)),
1132                dir, mode, want_excl);
1133
1134         rc = ll_mknod(dir, dentry, mode, 0);
1135
1136         ll_stats_ops_tally(ll_i2sbi(dir), LPROC_LL_CREATE, 1);
1137
1138         CDEBUG(D_VFSTRACE, "VFS Op:name=%.*s, unhashed %d\n",
1139                dentry->d_name.len, dentry->d_name.name, d_unhashed(dentry));
1140
1141         return rc;
1142 }
1143 #else /* !HAVE_IOP_ATOMIC_OPEN */
1144 static int ll_create_nd(struct inode *dir, struct dentry *dentry,
1145                         ll_umode_t mode, struct nameidata *nd)
1146 {
1147         struct ll_dentry_data *lld = ll_d2d(dentry);
1148         struct lookup_intent *it = NULL;
1149         int rc;
1150
1151         CFS_FAIL_TIMEOUT(OBD_FAIL_LLITE_CREATE_FILE_PAUSE, cfs_fail_val);
1152
1153         if (lld != NULL)
1154                 it = lld->lld_it;
1155
1156         if (!it)
1157                 return ll_mknod(dir, dentry, mode, 0);
1158
1159         lld->lld_it = NULL;
1160
1161         /* Was there an error? Propagate it! */
1162         if (it->it_status) {
1163                 rc = it->it_status;
1164                 goto out;
1165         }
1166
1167         rc = ll_create_it(dir, dentry, it);
1168         if (nd && (nd->flags & LOOKUP_OPEN) && dentry->d_inode) { /* Open */
1169                 struct file *filp;
1170
1171                 nd->intent.open.file->private_data = it;
1172                 filp = lookup_instantiate_filp(nd, dentry, NULL);
1173                 if (IS_ERR(filp))
1174                         rc = PTR_ERR(filp);
1175         }
1176
1177 out:
1178         ll_intent_release(it);
1179         OBD_FREE(it, sizeof(*it));
1180
1181         if (!rc)
1182                 ll_stats_ops_tally(ll_i2sbi(dir), LPROC_LL_CREATE, 1);
1183
1184         return rc;
1185 }
1186 #endif /* HAVE_IOP_ATOMIC_OPEN */
1187
1188 static int ll_symlink(struct inode *dir, struct dentry *dchild,
1189                       const char *oldpath)
1190 {
1191         struct qstr *name = &dchild->d_name;
1192         int err;
1193         ENTRY;
1194
1195         CDEBUG(D_VFSTRACE, "VFS Op:name=%.*s, dir="DFID"(%p), target=%.*s\n",
1196                name->len, name->name, PFID(ll_inode2fid(dir)),
1197                dir, 3000, oldpath);
1198
1199         err = ll_new_node(dir, dchild, oldpath, S_IFLNK | S_IRWXUGO, 0,
1200                           LUSTRE_OPC_SYMLINK);
1201
1202         if (!err)
1203                 ll_stats_ops_tally(ll_i2sbi(dir), LPROC_LL_SYMLINK, 1);
1204
1205         RETURN(err);
1206 }
1207
1208 static int ll_link(struct dentry *old_dentry, struct inode *dir,
1209                    struct dentry *new_dentry)
1210 {
1211         struct inode *src = old_dentry->d_inode;
1212         struct qstr *name = &new_dentry->d_name;
1213         struct ll_sb_info *sbi = ll_i2sbi(dir);
1214         struct ptlrpc_request *request = NULL;
1215         struct md_op_data *op_data;
1216         int err;
1217
1218         ENTRY;
1219         CDEBUG(D_VFSTRACE, "VFS Op: inode="DFID"(%p), dir="DFID"(%p), "
1220                "target=%.*s\n", PFID(ll_inode2fid(src)), src,
1221                PFID(ll_inode2fid(dir)), dir, name->len, name->name);
1222
1223         op_data = ll_prep_md_op_data(NULL, src, dir, name->name, name->len,
1224                                      0, LUSTRE_OPC_ANY, NULL);
1225         if (IS_ERR(op_data))
1226                 RETURN(PTR_ERR(op_data));
1227
1228         err = md_link(sbi->ll_md_exp, op_data, &request);
1229         ll_finish_md_op_data(op_data);
1230         if (err)
1231                 GOTO(out, err);
1232
1233         ll_update_times(request, dir);
1234         ll_stats_ops_tally(sbi, LPROC_LL_LINK, 1);
1235         EXIT;
1236 out:
1237         ptlrpc_req_finished(request);
1238         RETURN(err);
1239 }
1240
1241 static int ll_mkdir(struct inode *dir, struct dentry *dchild, ll_umode_t mode)
1242 {
1243         struct qstr *name = &dchild->d_name;
1244         int err;
1245         ENTRY;
1246
1247         CDEBUG(D_VFSTRACE, "VFS Op:name=%.*s, dir="DFID"(%p)\n",
1248                name->len, name->name, PFID(ll_inode2fid(dir)), dir);
1249
1250         if (!IS_POSIXACL(dir) || !exp_connect_umask(ll_i2mdexp(dir)))
1251                 mode &= ~current_umask();
1252
1253         mode = (mode & (S_IRWXUGO|S_ISVTX)) | S_IFDIR;
1254
1255         err = ll_new_node(dir, dchild, NULL, mode, 0, LUSTRE_OPC_MKDIR);
1256         if (err == 0)
1257                 ll_stats_ops_tally(ll_i2sbi(dir), LPROC_LL_MKDIR, 1);
1258
1259         RETURN(err);
1260 }
1261
1262 static int ll_rmdir(struct inode *dir, struct dentry *dchild)
1263 {
1264         struct qstr *name = &dchild->d_name;
1265         struct ptlrpc_request *request = NULL;
1266         struct md_op_data *op_data;
1267         int rc;
1268         ENTRY;
1269
1270         CDEBUG(D_VFSTRACE, "VFS Op:name=%.*s, dir="DFID"(%p)\n",
1271                name->len, name->name, PFID(ll_inode2fid(dir)), dir);
1272
1273         if (unlikely(d_mountpoint(dchild)))
1274                 RETURN(-EBUSY);
1275
1276         op_data = ll_prep_md_op_data(NULL, dir, NULL, name->name, name->len,
1277                                      S_IFDIR, LUSTRE_OPC_ANY, NULL);
1278         if (IS_ERR(op_data))
1279                 RETURN(PTR_ERR(op_data));
1280
1281         if (dchild->d_inode != NULL)
1282                 op_data->op_fid3 = *ll_inode2fid(dchild->d_inode);
1283
1284         op_data->op_fid2 = op_data->op_fid3;
1285         rc = md_unlink(ll_i2sbi(dir)->ll_md_exp, op_data, &request);
1286         ll_finish_md_op_data(op_data);
1287         if (rc == 0) {
1288                 ll_update_times(request, dir);
1289                 ll_stats_ops_tally(ll_i2sbi(dir), LPROC_LL_RMDIR, 1);
1290         }
1291
1292         ptlrpc_req_finished(request);
1293         RETURN(rc);
1294 }
1295
1296 /**
1297  * Remove dir entry
1298  **/
1299 int ll_rmdir_entry(struct inode *dir, char *name, int namelen)
1300 {
1301         struct ptlrpc_request *request = NULL;
1302         struct md_op_data *op_data;
1303         int rc;
1304         ENTRY;
1305
1306         CDEBUG(D_VFSTRACE, "VFS Op:name=%.*s, dir="DFID"(%p)\n",
1307                namelen, name, PFID(ll_inode2fid(dir)), dir);
1308
1309         op_data = ll_prep_md_op_data(NULL, dir, NULL, name, strlen(name),
1310                                      S_IFDIR, LUSTRE_OPC_ANY, NULL);
1311         if (IS_ERR(op_data))
1312                 RETURN(PTR_ERR(op_data));
1313         op_data->op_cli_flags |= CLI_RM_ENTRY;
1314         rc = md_unlink(ll_i2sbi(dir)->ll_md_exp, op_data, &request);
1315         ll_finish_md_op_data(op_data);
1316         if (rc == 0) {
1317                 ll_update_times(request, dir);
1318                 ll_stats_ops_tally(ll_i2sbi(dir), LPROC_LL_RMDIR, 1);
1319         }
1320
1321         ptlrpc_req_finished(request);
1322         RETURN(rc);
1323 }
1324
1325 static int ll_unlink(struct inode *dir, struct dentry *dchild)
1326 {
1327         struct qstr *name = &dchild->d_name;
1328         struct ptlrpc_request *request = NULL;
1329         struct md_op_data *op_data;
1330         int rc;
1331         ENTRY;
1332         CDEBUG(D_VFSTRACE, "VFS Op:name=%.*s, dir="DFID"(%p)\n",
1333                name->len, name->name, PFID(ll_inode2fid(dir)), dir);
1334
1335         /*
1336          * XXX: unlink bind mountpoint maybe call to here,
1337          * just check it as vfs_unlink does.
1338          */
1339         if (unlikely(d_mountpoint(dchild)))
1340                 RETURN(-EBUSY);
1341
1342         op_data = ll_prep_md_op_data(NULL, dir, NULL, name->name, name->len, 0,
1343                                      LUSTRE_OPC_ANY, NULL);
1344         if (IS_ERR(op_data))
1345                 RETURN(PTR_ERR(op_data));
1346
1347         if (dchild->d_inode != NULL)
1348                 op_data->op_fid3 = *ll_inode2fid(dchild->d_inode);
1349
1350         op_data->op_fid2 = op_data->op_fid3;
1351         rc = md_unlink(ll_i2sbi(dir)->ll_md_exp, op_data, &request);
1352         ll_finish_md_op_data(op_data);
1353         if (rc)
1354                 GOTO(out, rc);
1355
1356         ll_update_times(request, dir);
1357         ll_stats_ops_tally(ll_i2sbi(dir), LPROC_LL_UNLINK, 1);
1358
1359  out:
1360         ptlrpc_req_finished(request);
1361         RETURN(rc);
1362 }
1363
1364 static int ll_rename(struct inode *src, struct dentry *src_dchild,
1365                      struct inode *tgt, struct dentry *tgt_dchild)
1366 {
1367         struct qstr *src_name = &src_dchild->d_name;
1368         struct qstr *tgt_name = &tgt_dchild->d_name;
1369         struct ptlrpc_request *request = NULL;
1370         struct ll_sb_info *sbi = ll_i2sbi(src);
1371         struct md_op_data *op_data;
1372         int err;
1373         ENTRY;
1374         CDEBUG(D_VFSTRACE, "VFS Op:oldname=%.*s, src_dir="DFID
1375                "(%p), newname=%.*s, tgt_dir="DFID"(%p)\n",
1376                src_name->len, src_name->name,
1377                PFID(ll_inode2fid(src)), src, tgt_name->len,
1378                tgt_name->name, PFID(ll_inode2fid(tgt)), tgt);
1379
1380         if (unlikely(d_mountpoint(src_dchild) || d_mountpoint(tgt_dchild)))
1381                 RETURN(-EBUSY);
1382
1383         op_data = ll_prep_md_op_data(NULL, src, tgt, NULL, 0, 0,
1384                                      LUSTRE_OPC_ANY, NULL);
1385         if (IS_ERR(op_data))
1386                 RETURN(PTR_ERR(op_data));
1387
1388         if (src_dchild->d_inode != NULL)
1389                 op_data->op_fid3 = *ll_inode2fid(src_dchild->d_inode);
1390
1391         if (tgt_dchild->d_inode != NULL)
1392                 op_data->op_fid4 = *ll_inode2fid(tgt_dchild->d_inode);
1393
1394         err = md_rename(sbi->ll_md_exp, op_data,
1395                         src_name->name, src_name->len,
1396                         tgt_name->name, tgt_name->len, &request);
1397         ll_finish_md_op_data(op_data);
1398         if (!err) {
1399                 ll_update_times(request, src);
1400                 ll_update_times(request, tgt);
1401                 ll_stats_ops_tally(sbi, LPROC_LL_RENAME, 1);
1402         }
1403
1404         ptlrpc_req_finished(request);
1405
1406         if (err == 0)
1407                 d_move(src_dchild, tgt_dchild);
1408
1409         RETURN(err);
1410 }
1411
1412 const struct inode_operations ll_dir_inode_operations = {
1413         .mknod              = ll_mknod,
1414 #ifdef HAVE_IOP_ATOMIC_OPEN
1415         .atomic_open        = ll_atomic_open,
1416 #endif
1417         .lookup             = ll_lookup_nd,
1418         .create             = ll_create_nd,
1419         /* We need all these non-raw things for NFSD, to not patch it. */
1420         .unlink             = ll_unlink,
1421         .mkdir              = ll_mkdir,
1422         .rmdir              = ll_rmdir,
1423         .symlink            = ll_symlink,
1424         .link               = ll_link,
1425         .rename             = ll_rename,
1426         .setattr            = ll_setattr,
1427         .getattr            = ll_getattr,
1428         .permission         = ll_inode_permission,
1429         .setxattr           = ll_setxattr,
1430         .getxattr           = ll_getxattr,
1431         .listxattr          = ll_listxattr,
1432         .removexattr        = ll_removexattr,
1433 #ifdef HAVE_IOP_GET_ACL
1434         .get_acl            = ll_get_acl,
1435 #endif
1436 };
1437
1438 const struct inode_operations ll_special_inode_operations = {
1439         .setattr        = ll_setattr,
1440         .getattr        = ll_getattr,
1441         .permission     = ll_inode_permission,
1442         .setxattr       = ll_setxattr,
1443         .getxattr       = ll_getxattr,
1444         .listxattr      = ll_listxattr,
1445         .removexattr    = ll_removexattr,
1446 #ifdef HAVE_IOP_GET_ACL
1447         .get_acl            = ll_get_acl,
1448 #endif
1449 };