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LU-10556 build: add require libyaml and zlib
[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.gnu.org/licenses/gpl-2.0.html
19  *
20  * GPL HEADER END
21  */
22 /*
23  * Copyright (c) 2002, 2010, Oracle and/or its affiliates. All rights reserved.
24  * Use is subject to license terms.
25  *
26  * Copyright (c) 2011, 2017, Intel Corporation.
27  */
28 /*
29  * This file is part of Lustre, http://www.lustre.org/
30  * Lustre is a trademark of Sun Microsystems, Inc.
31  */
32
33 #include <linux/fs.h>
34 #include <linux/sched.h>
35 #include <linux/mm.h>
36 #include <linux/quotaops.h>
37 #include <linux/highmem.h>
38 #include <linux/pagemap.h>
39 #include <linux/security.h>
40 #include <linux/user_namespace.h>
41 #ifdef HAVE_UIDGID_HEADER
42 # include <linux/uidgid.h>
43 #endif
44
45 #define DEBUG_SUBSYSTEM S_LLITE
46
47 #include <obd_support.h>
48 #include <lustre_fid.h>
49 #include <lustre_dlm.h>
50 #include "llite_internal.h"
51
52 static int ll_create_it(struct inode *dir, struct dentry *dentry,
53                         struct lookup_intent *it,
54                         void *secctx, __u32 secctxlen);
55
56 /* called from iget5_locked->find_inode() under inode_lock spinlock */
57 static int ll_test_inode(struct inode *inode, void *opaque)
58 {
59         struct ll_inode_info    *lli = ll_i2info(inode);
60         struct lustre_md        *md = opaque;
61
62         if (unlikely(!(md->body->mbo_valid & OBD_MD_FLID))) {
63                 CERROR("MDS body missing FID\n");
64                 return 0;
65         }
66
67         if (!lu_fid_eq(&lli->lli_fid, &md->body->mbo_fid1))
68                 return 0;
69
70         return 1;
71 }
72
73 static int ll_set_inode(struct inode *inode, void *opaque)
74 {
75         struct ll_inode_info *lli = ll_i2info(inode);
76         struct mdt_body *body = ((struct lustre_md *)opaque)->body;
77
78         if (unlikely(!(body->mbo_valid & OBD_MD_FLID))) {
79                 CERROR("MDS body missing FID\n");
80                 return -EINVAL;
81         }
82
83         lli->lli_fid = body->mbo_fid1;
84         if (unlikely(!(body->mbo_valid & OBD_MD_FLTYPE))) {
85                 CERROR("Can not initialize inode "DFID" without object type: "
86                        "valid = %#llx\n",
87                        PFID(&lli->lli_fid), body->mbo_valid);
88                 return -EINVAL;
89         }
90
91         inode->i_mode = (inode->i_mode & ~S_IFMT) | (body->mbo_mode & S_IFMT);
92         if (unlikely(inode->i_mode == 0)) {
93                 CERROR("Invalid inode "DFID" type\n", PFID(&lli->lli_fid));
94                 return -EINVAL;
95         }
96
97         ll_lli_init(lli);
98
99         return 0;
100 }
101
102
103 /**
104  * Get an inode by inode number(@hash), which is already instantiated by
105  * the intent lookup).
106  */
107 struct inode *ll_iget(struct super_block *sb, ino_t hash,
108                       struct lustre_md *md)
109 {
110         struct inode    *inode;
111         int             rc = 0;
112
113         ENTRY;
114
115         LASSERT(hash != 0);
116         inode = iget5_locked(sb, hash, ll_test_inode, ll_set_inode, md);
117         if (inode == NULL)
118                 RETURN(ERR_PTR(-ENOMEM));
119
120         if (inode->i_state & I_NEW) {
121                 rc = ll_read_inode2(inode, md);
122                 if (rc == 0 && S_ISREG(inode->i_mode) &&
123                     ll_i2info(inode)->lli_clob == NULL)
124                         rc = cl_file_inode_init(inode, md);
125
126                 if (rc != 0) {
127                         /* Let's clear directory lsm here, otherwise
128                          * make_bad_inode() will reset the inode mode
129                          * to regular, then ll_clear_inode will not
130                          * be able to clear lsm_md */
131                         if (S_ISDIR(inode->i_mode))
132                                 ll_dir_clear_lsm_md(inode);
133                         make_bad_inode(inode);
134                         unlock_new_inode(inode);
135                         iput(inode);
136                         inode = ERR_PTR(rc);
137                 } else {
138                         inode_has_no_xattr(inode);
139                         unlock_new_inode(inode);
140                 }
141         } else if (is_bad_inode(inode)) {
142                 iput(inode);
143                 inode = ERR_PTR(-ESTALE);
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_dom_lock_cancel(struct inode *inode, struct ldlm_lock *lock)
188 {
189         struct lu_env *env;
190         struct ll_inode_info *lli = ll_i2info(inode);
191         struct cl_layout clt = { .cl_layout_gen = 0, };
192         int rc;
193         __u16 refcheck;
194
195
196         ENTRY;
197
198         if (!lli->lli_clob)
199                 RETURN(0);
200
201         env = cl_env_get(&refcheck);
202         if (IS_ERR(env))
203                 RETURN(PTR_ERR(env));
204
205         rc = cl_object_layout_get(env, lli->lli_clob, &clt);
206         if (rc) {
207                 CDEBUG(D_INODE, "Cannot get layout for "DFID"\n",
208                        PFID(ll_inode2fid(inode)));
209                 rc = -ENODATA;
210         } else if (clt.cl_size == 0 || clt.cl_dom_comp_size == 0) {
211                 CDEBUG(D_INODE, "DOM lock without DOM layout for "DFID"\n",
212                        PFID(ll_inode2fid(inode)));
213         } else {
214                 enum cl_fsync_mode mode;
215                 loff_t end = clt.cl_dom_comp_size - 1;
216
217                 mode = ldlm_is_discard_data(lock) ?
218                                         CL_FSYNC_DISCARD : CL_FSYNC_LOCAL;
219                 rc = cl_sync_file_range(inode, 0, end, mode, 1);
220                 truncate_inode_pages_range(inode->i_mapping, 0, end);
221         }
222         cl_env_put(env, &refcheck);
223         RETURN(rc);
224 }
225
226 int ll_md_blocking_ast(struct ldlm_lock *lock, struct ldlm_lock_desc *desc,
227                        void *data, int flag)
228 {
229         struct lustre_handle lockh;
230         int rc;
231         ENTRY;
232
233         switch (flag) {
234         case LDLM_CB_BLOCKING:
235                 ldlm_lock2handle(lock, &lockh);
236                 rc = ldlm_cli_cancel(&lockh, LCF_ASYNC);
237                 if (rc < 0) {
238                         CDEBUG(D_INODE, "ldlm_cli_cancel: rc = %d\n", rc);
239                         RETURN(rc);
240                 }
241                 break;
242         case LDLM_CB_CANCELING: {
243                 struct inode *inode = ll_inode_from_resource_lock(lock);
244                 __u64 bits = lock->l_policy_data.l_inodebits.bits;
245
246                 if (inode == NULL)
247                         break;
248
249                 /* Invalidate all dentries associated with this inode */
250                 LASSERT(ldlm_is_canceling(lock));
251
252                 if (!fid_res_name_eq(ll_inode2fid(inode),
253                                      &lock->l_resource->lr_name)) {
254                         LDLM_ERROR(lock, "data mismatch with object "DFID"(%p)",
255                                    PFID(ll_inode2fid(inode)), inode);
256                         LBUG();
257                 }
258
259                 if (bits & MDS_INODELOCK_XATTR) {
260                         if (S_ISDIR(inode->i_mode))
261                                 ll_i2info(inode)->lli_def_stripe_offset = -1;
262                         ll_xattr_cache_destroy(inode);
263                         bits &= ~MDS_INODELOCK_XATTR;
264                 }
265
266                 /* For OPEN locks we differentiate between lock modes
267                  * LCK_CR, LCK_CW, LCK_PR - bug 22891 */
268                 if (bits & MDS_INODELOCK_OPEN)
269                         ll_have_md_lock(inode, &bits, lock->l_req_mode);
270
271                 if (bits & MDS_INODELOCK_OPEN) {
272                         fmode_t fmode;
273
274                         switch (lock->l_req_mode) {
275                         case LCK_CW:
276                                 fmode = FMODE_WRITE;
277                                 break;
278                         case LCK_PR:
279                                 fmode = FMODE_EXEC;
280                                 break;
281                         case LCK_CR:
282                                 fmode = FMODE_READ;
283                                 break;
284                         default:
285                                 LDLM_ERROR(lock, "bad lock mode for OPEN lock");
286                                 LBUG();
287                         }
288
289                         ll_md_real_close(inode, fmode);
290
291                         bits &= ~MDS_INODELOCK_OPEN;
292                 }
293
294                 if (bits & (MDS_INODELOCK_LOOKUP | MDS_INODELOCK_UPDATE |
295                             MDS_INODELOCK_LAYOUT | MDS_INODELOCK_PERM |
296                             MDS_INODELOCK_DOM))
297                         ll_have_md_lock(inode, &bits, LCK_MINMODE);
298
299                 if (bits & MDS_INODELOCK_DOM) {
300                         rc =  ll_dom_lock_cancel(inode, lock);
301                         if (rc < 0)
302                                 CDEBUG(D_INODE, "cannot flush DoM data "
303                                        DFID": rc = %d\n",
304                                        PFID(ll_inode2fid(inode)), rc);
305                         lock_res_and_lock(lock);
306                         ldlm_set_kms_ignore(lock);
307                         unlock_res_and_lock(lock);
308                         bits &= ~MDS_INODELOCK_DOM;
309                 }
310
311                 if (bits & MDS_INODELOCK_LAYOUT) {
312                         struct cl_object_conf conf = {
313                                 .coc_opc = OBJECT_CONF_INVALIDATE,
314                                 .coc_inode = inode,
315                         };
316
317                         rc = ll_layout_conf(inode, &conf);
318                         if (rc < 0)
319                                 CDEBUG(D_INODE, "cannot invalidate layout of "
320                                        DFID": rc = %d\n",
321                                        PFID(ll_inode2fid(inode)), rc);
322                 }
323
324                 if (bits & MDS_INODELOCK_UPDATE) {
325                         struct ll_inode_info *lli = ll_i2info(inode);
326                         lli->lli_update_atime = 1;
327                 }
328
329                 if ((bits & MDS_INODELOCK_UPDATE) && S_ISDIR(inode->i_mode)) {
330                         struct ll_inode_info *lli = ll_i2info(inode);
331
332                         CDEBUG(D_INODE, "invalidating inode "DFID" lli = %p, "
333                                "pfid  = "DFID"\n", PFID(ll_inode2fid(inode)),
334                                lli, PFID(&lli->lli_pfid));
335                         truncate_inode_pages(inode->i_mapping, 0);
336
337                         if (unlikely(!fid_is_zero(&lli->lli_pfid))) {
338                                 struct inode *master_inode = NULL;
339                                 unsigned long hash;
340
341                                 /* This is slave inode, since all of the child
342                                  * dentry is connected on the master inode, so
343                                  * we have to invalidate the negative children
344                                  * on master inode */
345                                 CDEBUG(D_INODE, "Invalidate s"DFID" m"DFID"\n",
346                                        PFID(ll_inode2fid(inode)),
347                                        PFID(&lli->lli_pfid));
348
349                                 hash = cl_fid_build_ino(&lli->lli_pfid,
350                                         ll_need_32bit_api(ll_i2sbi(inode)));
351
352                                 /* Do not lookup the inode with ilookup5,
353                                  * otherwise it will cause dead lock,
354                                  *
355                                  * 1. Client1 send chmod req to the MDT0, then
356                                  * on MDT0, it enqueues master and all of its
357                                  * slaves lock, (mdt_attr_set() ->
358                                  * mdt_lock_slaves()), after gets master and
359                                  * stripe0 lock, it will send the enqueue req
360                                  * (for stripe1) to MDT1, then MDT1 finds the
361                                  * lock has been granted to client2. Then MDT1
362                                  * sends blocking ast to client2.
363                                  *
364                                  * 2. At the same time, client2 tries to unlink
365                                  * the striped dir (rm -rf striped_dir), and
366                                  * during lookup, it will hold the master inode
367                                  * of the striped directory, whose inode state
368                                  * is NEW, then tries to revalidate all of its
369                                  * slaves, (ll_prep_inode()->ll_iget()->
370                                  * ll_read_inode2()-> ll_update_inode().). And
371                                  * it will be blocked on the server side because
372                                  * of 1.
373                                  *
374                                  * 3. Then the client get the blocking_ast req,
375                                  * cancel the lock, but being blocked if using
376                                  * ->ilookup5()), because master inode state is
377                                  *  NEW. */
378                                 master_inode = ilookup5_nowait(inode->i_sb,
379                                                     hash, ll_test_inode_by_fid,
380                                                         (void *)&lli->lli_pfid);
381                                 if (master_inode) {
382                                         ll_invalidate_negative_children(
383                                                                 master_inode);
384                                         iput(master_inode);
385                                 }
386                         } else {
387                                 ll_invalidate_negative_children(inode);
388                         }
389                 }
390
391                 if ((bits & (MDS_INODELOCK_LOOKUP | MDS_INODELOCK_PERM)) &&
392                     inode->i_sb->s_root != NULL &&
393                     inode != inode->i_sb->s_root->d_inode)
394                         ll_invalidate_aliases(inode);
395
396                 iput(inode);
397                 break;
398         }
399         default:
400                 LBUG();
401         }
402
403         RETURN(0);
404 }
405
406 __u32 ll_i2suppgid(struct inode *i)
407 {
408         if (in_group_p(i->i_gid))
409                 return (__u32)from_kgid(&init_user_ns, i->i_gid);
410         else
411                 return (__u32) __kgid_val(INVALID_GID);
412 }
413
414 /* Pack the required supplementary groups into the supplied groups array.
415  * If we don't need to use the groups from the target inode(s) then we
416  * instead pack one or more groups from the user's supplementary group
417  * array in case it might be useful.  Not needed if doing an MDS-side upcall. */
418 void ll_i2gids(__u32 *suppgids, struct inode *i1, struct inode *i2)
419 {
420         LASSERT(i1 != NULL);
421         LASSERT(suppgids != NULL);
422
423         suppgids[0] = ll_i2suppgid(i1);
424
425         if (i2)
426                 suppgids[1] = ll_i2suppgid(i2);
427         else
428                 suppgids[1] = -1;
429 }
430
431 /*
432  * try to reuse three types of dentry:
433  * 1. unhashed alias, this one is unhashed by d_invalidate (but it may be valid
434  *    by concurrent .revalidate).
435  * 2. INVALID alias (common case for no valid ldlm lock held, but this flag may
436  *    be cleared by others calling d_lustre_revalidate).
437  * 3. DISCONNECTED alias.
438  */
439 static struct dentry *ll_find_alias(struct inode *inode, struct dentry *dentry)
440 {
441         struct dentry *alias, *discon_alias, *invalid_alias;
442         DECLARE_LL_D_HLIST_NODE_PTR(p);
443
444         if (ll_d_hlist_empty(&inode->i_dentry))
445                 return NULL;
446
447         discon_alias = invalid_alias = NULL;
448
449         ll_lock_dcache(inode);
450         ll_d_hlist_for_each_entry(alias, p, &inode->i_dentry) {
451                 LASSERT(alias != dentry);
452
453                 spin_lock(&alias->d_lock);
454                 if ((alias->d_flags & DCACHE_DISCONNECTED) &&
455                     S_ISDIR(inode->i_mode))
456                         /* LASSERT(last_discon == NULL); LU-405, bz 20055 */
457                         discon_alias = alias;
458                 else if (alias->d_parent == dentry->d_parent             &&
459                          alias->d_name.hash == dentry->d_name.hash       &&
460                          alias->d_name.len == dentry->d_name.len         &&
461                          memcmp(alias->d_name.name, dentry->d_name.name,
462                                 dentry->d_name.len) == 0)
463                         invalid_alias = alias;
464                 spin_unlock(&alias->d_lock);
465
466                 if (invalid_alias)
467                         break;
468         }
469         alias = invalid_alias ?: discon_alias ?: NULL;
470         if (alias) {
471                 spin_lock(&alias->d_lock);
472                 dget_dlock(alias);
473                 spin_unlock(&alias->d_lock);
474         }
475         ll_unlock_dcache(inode);
476
477         return alias;
478 }
479
480 /*
481  * Similar to d_splice_alias(), but lustre treats invalid alias
482  * similar to DCACHE_DISCONNECTED, and tries to use it anyway.
483  */
484 struct dentry *ll_splice_alias(struct inode *inode, struct dentry *de)
485 {
486         struct dentry *new;
487         int rc;
488
489         if (inode) {
490                 new = ll_find_alias(inode, de);
491                 if (new) {
492                         rc = ll_d_init(new);
493                         if (rc < 0) {
494                                 dput(new);
495                                 return ERR_PTR(rc);
496                         }
497                         d_move(new, de);
498                         iput(inode);
499                         CDEBUG(D_DENTRY,
500                                "Reuse dentry %p inode %p refc %d flags %#x\n",
501                               new, new->d_inode, ll_d_count(new), new->d_flags);
502                         return new;
503                 }
504         }
505         rc = ll_d_init(de);
506         if (rc < 0)
507                 return ERR_PTR(rc);
508         d_add(de, inode);
509         CDEBUG(D_DENTRY, "Add dentry %p inode %p refc %d flags %#x\n",
510                de, de->d_inode, ll_d_count(de), de->d_flags);
511         return de;
512 }
513
514 static int ll_lookup_it_finish(struct ptlrpc_request *request,
515                                struct lookup_intent *it,
516                                struct inode *parent, struct dentry **de)
517 {
518         struct inode             *inode = NULL;
519         __u64                     bits = 0;
520         int                       rc;
521         struct dentry *alias;
522         ENTRY;
523
524         /* NB 1 request reference will be taken away by ll_intent_lock()
525          * when I return */
526         CDEBUG(D_DENTRY, "it %p it_disposition %x\n", it,
527                it->it_disposition);
528         if (!it_disposition(it, DISP_LOOKUP_NEG)) {
529                 rc = ll_prep_inode(&inode, request, (*de)->d_sb, it);
530                 if (rc)
531                         RETURN(rc);
532
533                 ll_set_lock_data(ll_i2sbi(parent)->ll_md_exp, inode, it, &bits);
534
535                 /* We used to query real size from OSTs here, but actually
536                    this is not needed. For stat() calls size would be updated
537                    from subsequent do_revalidate()->ll_inode_revalidate_it() in
538                    2.4 and
539                    vfs_getattr_it->ll_getattr()->ll_inode_revalidate_it() in 2.6
540                    Everybody else who needs correct file size would call
541                    ll_glimpse_size or some equivalent themselves anyway.
542                    Also see bug 7198. */
543         }
544
545         /* Only hash *de if it is unhashed (new dentry).
546          * Atoimc_open may passin hashed dentries for open.
547          */
548         alias = ll_splice_alias(inode, *de);
549         if (IS_ERR(alias))
550                 GOTO(out, rc = PTR_ERR(alias));
551
552         *de = alias;
553
554         if (!it_disposition(it, DISP_LOOKUP_NEG)) {
555                 /* we have lookup look - unhide dentry */
556                 if (bits & MDS_INODELOCK_LOOKUP)
557                         d_lustre_revalidate(*de);
558         } else if (!it_disposition(it, DISP_OPEN_CREATE)) {
559                 /* If file created on server, don't depend on parent UPDATE
560                  * lock to unhide it. It is left hidden and next lookup can
561                  * find it in ll_splice_alias.
562                  */
563                 /* Check that parent has UPDATE lock. */
564                 struct lookup_intent parent_it = {
565                                         .it_op = IT_GETATTR,
566                                         .it_lock_handle = 0 };
567                 struct lu_fid   fid = ll_i2info(parent)->lli_fid;
568
569                 /* If it is striped directory, get the real stripe parent */
570                 if (unlikely(ll_i2info(parent)->lli_lsm_md != NULL)) {
571                         rc = md_get_fid_from_lsm(ll_i2mdexp(parent),
572                                                  ll_i2info(parent)->lli_lsm_md,
573                                                  (*de)->d_name.name,
574                                                  (*de)->d_name.len, &fid);
575                         if (rc != 0)
576                                 GOTO(out, rc);
577                 }
578
579                 if (md_revalidate_lock(ll_i2mdexp(parent), &parent_it, &fid,
580                                        NULL)) {
581                         d_lustre_revalidate(*de);
582                         ll_intent_release(&parent_it);
583                 }
584         }
585
586         GOTO(out, rc = 0);
587
588 out:
589         if (rc != 0 && it->it_op & IT_OPEN)
590                 ll_open_cleanup((*de)->d_sb, request);
591
592         return rc;
593 }
594
595 static struct dentry *ll_lookup_it(struct inode *parent, struct dentry *dentry,
596                                    struct lookup_intent *it,
597                                    void **secctx, __u32 *secctxlen)
598 {
599         struct lookup_intent lookup_it = { .it_op = IT_LOOKUP };
600         struct dentry *save = dentry, *retval;
601         struct ptlrpc_request *req = NULL;
602         struct md_op_data *op_data = NULL;
603         __u32 opc;
604         int rc;
605         ENTRY;
606
607         if (dentry->d_name.len > ll_i2sbi(parent)->ll_namelen)
608                 RETURN(ERR_PTR(-ENAMETOOLONG));
609
610         CDEBUG(D_VFSTRACE, "VFS Op:name=%.*s, dir="DFID"(%p), intent=%s\n",
611                dentry->d_name.len, dentry->d_name.name,
612                PFID(ll_inode2fid(parent)), parent, LL_IT2STR(it));
613
614         if (d_mountpoint(dentry))
615                 CERROR("Tell Peter, lookup on mtpt, it %s\n", LL_IT2STR(it));
616
617         if (it == NULL || it->it_op == IT_GETXATTR)
618                 it = &lookup_it;
619
620         if (it->it_op == IT_GETATTR && dentry_may_statahead(parent, dentry)) {
621                 rc = ll_statahead(parent, &dentry, 0);
622                 if (rc == 1)
623                         RETURN(dentry == save ? NULL : dentry);
624         }
625
626         if (it->it_op & IT_OPEN && it->it_flags & FMODE_WRITE &&
627             dentry->d_sb->s_flags & MS_RDONLY)
628                 RETURN(ERR_PTR(-EROFS));
629
630         if (it->it_op & IT_CREAT)
631                 opc = LUSTRE_OPC_CREATE;
632         else
633                 opc = LUSTRE_OPC_ANY;
634
635         op_data = ll_prep_md_op_data(NULL, parent, NULL, dentry->d_name.name,
636                                      dentry->d_name.len, 0, opc, NULL);
637         if (IS_ERR(op_data))
638                 GOTO(out, retval = ERR_CAST(op_data));
639
640         /* enforce umask if acl disabled or MDS doesn't support umask */
641         if (!IS_POSIXACL(parent) || !exp_connect_umask(ll_i2mdexp(parent)))
642                 it->it_create_mode &= ~current_umask();
643
644         if (it->it_op & IT_CREAT &&
645             ll_i2sbi(parent)->ll_flags & LL_SBI_FILE_SECCTX) {
646                 rc = ll_dentry_init_security(dentry, it->it_create_mode,
647                                              &dentry->d_name,
648                                              &op_data->op_file_secctx_name,
649                                              &op_data->op_file_secctx,
650                                              &op_data->op_file_secctx_size);
651                 if (rc < 0)
652                         GOTO(out, retval = ERR_PTR(rc));
653                 if (secctx != NULL)
654                         *secctx = op_data->op_file_secctx;
655                 if (secctxlen != NULL)
656                         *secctxlen = op_data->op_file_secctx_size;
657         }
658
659         rc = md_intent_lock(ll_i2mdexp(parent), op_data, it, &req,
660                             &ll_md_blocking_ast, 0);
661         /* If the MDS allows the client to chgrp (CFS_SETGRP_PERM), but the
662          * client does not know which suppgid should be sent to the MDS, or
663          * some other(s) changed the target file's GID after this RPC sent
664          * to the MDS with the suppgid as the original GID, then we should
665          * try again with right suppgid. */
666         if (rc == -EACCES && it->it_op & IT_OPEN &&
667             it_disposition(it, DISP_OPEN_DENY)) {
668                 struct mdt_body *body;
669
670                 LASSERT(req != NULL);
671
672                 body = req_capsule_server_get(&req->rq_pill, &RMF_MDT_BODY);
673                 if (op_data->op_suppgids[0] == body->mbo_gid ||
674                     op_data->op_suppgids[1] == body->mbo_gid ||
675                     !in_group_p(make_kgid(&init_user_ns, body->mbo_gid)))
676                         GOTO(out, retval = ERR_PTR(-EACCES));
677
678                 fid_zero(&op_data->op_fid2);
679                 op_data->op_suppgids[1] = body->mbo_gid;
680                 ptlrpc_req_finished(req);
681                 req = NULL;
682                 ll_intent_release(it);
683                 rc = md_intent_lock(ll_i2mdexp(parent), op_data, it, &req,
684                                     &ll_md_blocking_ast, 0);
685         }
686
687         if (rc < 0)
688                 GOTO(out, retval = ERR_PTR(rc));
689
690         rc = ll_lookup_it_finish(req, it, parent, &dentry);
691         if (rc != 0) {
692                 ll_intent_release(it);
693                 GOTO(out, retval = ERR_PTR(rc));
694         }
695
696         if ((it->it_op & IT_OPEN) && dentry->d_inode &&
697             !S_ISREG(dentry->d_inode->i_mode) &&
698             !S_ISDIR(dentry->d_inode->i_mode)) {
699                 ll_release_openhandle(dentry, it);
700         }
701         ll_lookup_finish_locks(it, dentry);
702
703         GOTO(out, retval = (dentry == save) ? NULL : dentry);
704
705 out:
706         if (op_data != NULL && !IS_ERR(op_data)) {
707                 if (secctx != NULL && secctxlen != NULL) {
708                         /* caller needs sec ctx info, so reset it in op_data to
709                          * prevent it from being freed */
710                         op_data->op_file_secctx = NULL;
711                         op_data->op_file_secctx_size = 0;
712                 }
713                 ll_finish_md_op_data(op_data);
714         }
715
716         ptlrpc_req_finished(req);
717         return retval;
718 }
719
720 #ifdef HAVE_IOP_ATOMIC_OPEN
721 static struct dentry *ll_lookup_nd(struct inode *parent, struct dentry *dentry,
722                                    unsigned int flags)
723 {
724         struct lookup_intent *itp, it = { .it_op = IT_GETATTR };
725         struct dentry *de;
726
727         CDEBUG(D_VFSTRACE, "VFS Op:name=%.*s, dir="DFID"(%p), flags=%u\n",
728                dentry->d_name.len, dentry->d_name.name,
729                PFID(ll_inode2fid(parent)), parent, flags);
730
731         /*
732          * Optimize away (CREATE && !OPEN). Let .create handle the race.
733          * but only if we have write permissions there, otherwise we need
734          * to proceed with lookup. LU-4185
735          */
736         if ((flags & LOOKUP_CREATE) && !(flags & LOOKUP_OPEN) &&
737             (inode_permission(parent, MAY_WRITE | MAY_EXEC) == 0))
738                 return NULL;
739
740         if (flags & (LOOKUP_PARENT|LOOKUP_OPEN|LOOKUP_CREATE))
741                 itp = NULL;
742         else
743                 itp = &it;
744         de = ll_lookup_it(parent, dentry, itp, NULL, NULL);
745
746         if (itp != NULL)
747                 ll_intent_release(itp);
748
749         return de;
750 }
751
752 /*
753  * For cached negative dentry and new dentry, handle lookup/create/open
754  * together.
755  */
756 static int ll_atomic_open(struct inode *dir, struct dentry *dentry,
757                           struct file *file, unsigned open_flags,
758                           umode_t mode, int *opened)
759 {
760         struct lookup_intent *it;
761         struct dentry *de;
762         long long lookup_flags = LOOKUP_OPEN;
763         void *secctx = NULL;
764         __u32 secctxlen = 0;
765         int rc = 0;
766         ENTRY;
767
768         CDEBUG(D_VFSTRACE, "VFS Op:name=%.*s, dir="DFID"(%p), file %p,"
769                            "open_flags %x, mode %x opened %d\n",
770                dentry->d_name.len, dentry->d_name.name,
771                PFID(ll_inode2fid(dir)), dir, file, open_flags, mode, *opened);
772
773         /* Only negative dentries enter here */
774         LASSERT(dentry->d_inode == NULL);
775
776         if (!d_unhashed(dentry)) {
777                 /* A valid negative dentry that just passed revalidation,
778                  * there's little point to try and open it server-side,
779                  * even though there's a minuscule chance it might succeed.
780                  * Either way it's a valid race to just return -ENOENT here.
781                  */
782                 if (!(open_flags & O_CREAT))
783                         return -ENOENT;
784
785                 /* Otherwise we just unhash it to be rehashed afresh via
786                  * lookup if necessary
787                  */
788                 d_drop(dentry);
789         }
790
791         OBD_ALLOC(it, sizeof(*it));
792         if (!it)
793                 RETURN(-ENOMEM);
794
795         it->it_op = IT_OPEN;
796         if (open_flags & O_CREAT) {
797                 it->it_op |= IT_CREAT;
798                 lookup_flags |= LOOKUP_CREATE;
799         }
800         it->it_create_mode = (mode & S_IALLUGO) | S_IFREG;
801         it->it_flags = (open_flags & ~O_ACCMODE) | OPEN_FMODE(open_flags);
802         it->it_flags &= ~MDS_OPEN_FL_INTERNAL;
803
804         /* Dentry added to dcache tree in ll_lookup_it */
805         de = ll_lookup_it(dir, dentry, it, &secctx, &secctxlen);
806         if (IS_ERR(de))
807                 rc = PTR_ERR(de);
808         else if (de != NULL)
809                 dentry = de;
810
811         CFS_FAIL_TIMEOUT(OBD_FAIL_LLITE_CREATE_FILE_PAUSE, cfs_fail_val);
812
813         if (!rc) {
814                 if (it_disposition(it, DISP_OPEN_CREATE)) {
815                         /* Dentry instantiated in ll_create_it. */
816                         rc = ll_create_it(dir, dentry, it, secctx, secctxlen);
817                         security_release_secctx(secctx, secctxlen);
818                         if (rc) {
819                                 /* We dget in ll_splice_alias. */
820                                 if (de != NULL)
821                                         dput(de);
822                                 goto out_release;
823                         }
824
825                         *opened |= FILE_CREATED;
826                 }
827                 if (dentry->d_inode && it_disposition(it, DISP_OPEN_OPEN)) {
828                         /* Open dentry. */
829                         if (S_ISFIFO(dentry->d_inode->i_mode)) {
830                                 /* We cannot call open here as it might
831                                  * deadlock. This case is unreachable in
832                                  * practice because of OBD_CONNECT_NODEVOH. */
833                                 rc = finish_no_open(file, de);
834                         } else {
835                                 file->private_data = it;
836                                 rc = finish_open(file, dentry, NULL, opened);
837                                 /* We dget in ll_splice_alias. finish_open takes
838                                  * care of dget for fd open.
839                                  */
840                                 if (de != NULL)
841                                         dput(de);
842                         }
843                 } else {
844                         rc = finish_no_open(file, de);
845                 }
846         }
847
848 out_release:
849         ll_intent_release(it);
850         OBD_FREE(it, sizeof(*it));
851
852         RETURN(rc);
853 }
854
855 #else /* !HAVE_IOP_ATOMIC_OPEN */
856 static struct lookup_intent *
857 ll_convert_intent(struct open_intent *oit, int lookup_flags, bool is_readonly)
858 {
859         struct lookup_intent *it;
860
861         OBD_ALLOC_PTR(it);
862         if (!it)
863                 return ERR_PTR(-ENOMEM);
864
865         if (lookup_flags & LOOKUP_OPEN) {
866                 it->it_op = IT_OPEN;
867                 /* Avoid file creation for ro bind mount point(is_readonly) */
868                 if ((lookup_flags & LOOKUP_CREATE) && !is_readonly)
869                         it->it_op |= IT_CREAT;
870                 it->it_create_mode = (oit->create_mode & S_IALLUGO) | S_IFREG;
871                 it->it_flags = ll_namei_to_lookup_intent_flag(oit->flags &
872                                                 ~(is_readonly ? O_CREAT : 0));
873                 it->it_flags &= ~MDS_OPEN_FL_INTERNAL;
874         } else {
875                 it->it_op = IT_GETATTR;
876         }
877
878         return it;
879 }
880
881 static struct dentry *ll_lookup_nd(struct inode *parent, struct dentry *dentry,
882                                    struct nameidata *nd)
883 {
884         struct dentry *de;
885         ENTRY;
886
887         if (nd && !(nd->flags & (LOOKUP_CONTINUE|LOOKUP_PARENT))) {
888                 struct lookup_intent *it;
889
890                 if (ll_d2d(dentry) && ll_d2d(dentry)->lld_it) {
891                         it = ll_d2d(dentry)->lld_it;
892                         ll_d2d(dentry)->lld_it = NULL;
893                 } else {
894                         /*
895                          * Optimize away (CREATE && !OPEN). Let .create handle
896                          * the race. But only if we have write permissions
897                          * there, otherwise we need to proceed with lookup.
898                          * LU-4185
899                          */
900                         if ((nd->flags & LOOKUP_CREATE) &&
901                             !(nd->flags & LOOKUP_OPEN) &&
902                             (inode_permission(parent,
903                                               MAY_WRITE | MAY_EXEC) == 0))
904                                 RETURN(NULL);
905
906                         it = ll_convert_intent(&nd->intent.open, nd->flags,
907                                 (nd->path.mnt->mnt_flags & MNT_READONLY) ||
908                                 (nd->path.mnt->mnt_sb->s_flags & MS_RDONLY));
909                         if (IS_ERR(it))
910                                 RETURN((struct dentry *)it);
911                 }
912
913                 de = ll_lookup_it(parent, dentry, it, NULL, NULL);
914                 if (de)
915                         dentry = de;
916                 if ((nd->flags & LOOKUP_OPEN) && !IS_ERR(dentry)) { /* Open */
917                         if (dentry->d_inode &&
918                             it_disposition(it, DISP_OPEN_OPEN)) { /* nocreate */
919                                 if (S_ISFIFO(dentry->d_inode->i_mode)) {
920                                         /* We cannot call open here as it might
921                                          * deadlock. This case is unreachable in
922                                          * practice because of
923                                          * OBD_CONNECT_NODEVOH. */
924                                 } else {
925                                         struct file *filp;
926
927                                         nd->intent.open.file->private_data = it;
928                                         filp = lookup_instantiate_filp(nd,
929                                                                        dentry,
930                                                                        NULL);
931                                         if (IS_ERR(filp)) {
932                                                 if (de)
933                                                         dput(de);
934                                                 de = (struct dentry *)filp;
935                                         }
936                                 }
937                         } else if (it_disposition(it, DISP_OPEN_CREATE)) {
938                                 /* XXX This can only reliably work on assumption
939                                  * that there are NO hashed negative dentries.*/
940                                 ll_d2d(dentry)->lld_it = it;
941                                 it = NULL; /* Will be freed in ll_create_nd */
942                                 /* We absolutely depend on ll_create_nd to be
943                                  * called to not leak this intent and possible
944                                  * data attached to it */
945                         }
946                 }
947
948                 if (it) {
949                         ll_intent_release(it);
950                         OBD_FREE(it, sizeof(*it));
951                 }
952         } else {
953                 de = ll_lookup_it(parent, dentry, NULL, NULL, NULL);
954         }
955
956         RETURN(de);
957 }
958 #endif /* HAVE_IOP_ATOMIC_OPEN */
959
960 /* We depend on "mode" being set with the proper file type/umask by now */
961 static struct inode *ll_create_node(struct inode *dir, struct lookup_intent *it)
962 {
963         struct inode *inode = NULL;
964         struct ptlrpc_request *request = NULL;
965         struct ll_sb_info *sbi = ll_i2sbi(dir);
966         int rc;
967         ENTRY;
968
969         LASSERT(it && it->it_disposition);
970
971         LASSERT(it_disposition(it, DISP_ENQ_CREATE_REF));
972         request = it->it_request;
973         it_clear_disposition(it, DISP_ENQ_CREATE_REF);
974         rc = ll_prep_inode(&inode, request, dir->i_sb, it);
975         if (rc)
976                 GOTO(out, inode = ERR_PTR(rc));
977
978         /* Pause to allow for a race with concurrent access by fid */
979         OBD_FAIL_TIMEOUT(OBD_FAIL_LLITE_CREATE_NODE_PAUSE, cfs_fail_val);
980
981         /* We asked for a lock on the directory, but were granted a
982          * lock on the inode.  Since we finally have an inode pointer,
983          * stuff it in the lock. */
984         CDEBUG(D_DLMTRACE, "setting l_ast_data to inode "DFID"(%p)\n",
985                PFID(ll_inode2fid(inode)), inode);
986         ll_set_lock_data(sbi->ll_md_exp, inode, it, NULL);
987         EXIT;
988  out:
989         ptlrpc_req_finished(request);
990         return inode;
991 }
992
993 /*
994  * By the time this is called, we already have created the directory cache
995  * entry for the new file, but it is so far negative - it has no inode.
996  *
997  * We defer creating the OBD object(s) until open, to keep the intent and
998  * non-intent code paths similar, and also because we do not have the MDS
999  * inode number before calling ll_create_node() (which is needed for LOV),
1000  * so we would need to do yet another RPC to the MDS to store the LOV EA
1001  * data on the MDS.  If needed, we would pass the PACKED lmm as data and
1002  * lmm_size in datalen (the MDS still has code which will handle that).
1003  *
1004  * If the create succeeds, we fill in the inode information
1005  * with d_instantiate().
1006  */
1007 static int ll_create_it(struct inode *dir, struct dentry *dentry,
1008                         struct lookup_intent *it,
1009                         void *secctx, __u32 secctxlen)
1010 {
1011         struct inode *inode;
1012         int rc = 0;
1013         ENTRY;
1014
1015         CDEBUG(D_VFSTRACE, "VFS Op:name=%.*s, dir="DFID"(%p), intent=%s\n",
1016                dentry->d_name.len, dentry->d_name.name,
1017                PFID(ll_inode2fid(dir)), dir, LL_IT2STR(it));
1018
1019         rc = it_open_error(DISP_OPEN_CREATE, it);
1020         if (rc)
1021                 RETURN(rc);
1022
1023         inode = ll_create_node(dir, it);
1024         if (IS_ERR(inode))
1025                 RETURN(PTR_ERR(inode));
1026
1027         if ((ll_i2sbi(inode)->ll_flags & LL_SBI_FILE_SECCTX) &&
1028             secctx != NULL) {
1029                 inode_lock(inode);
1030                 /* must be done before d_instantiate, because it calls
1031                  * security_d_instantiate, which means a getxattr if security
1032                  * context is not set yet */
1033                 rc = security_inode_notifysecctx(inode, secctx, secctxlen);
1034                 inode_unlock(inode);
1035                 if (rc)
1036                         RETURN(rc);
1037         }
1038
1039         d_instantiate(dentry, inode);
1040
1041         if (!(ll_i2sbi(inode)->ll_flags & LL_SBI_FILE_SECCTX)) {
1042                 rc = ll_inode_init_security(dentry, inode, dir);
1043                 if (rc)
1044                         RETURN(rc);
1045         }
1046
1047         RETURN(0);
1048 }
1049
1050 void ll_update_times(struct ptlrpc_request *request, struct inode *inode)
1051 {
1052         struct mdt_body *body = req_capsule_server_get(&request->rq_pill,
1053                                                        &RMF_MDT_BODY);
1054
1055         LASSERT(body);
1056         if (body->mbo_valid & OBD_MD_FLMTIME &&
1057             body->mbo_mtime > LTIME_S(inode->i_mtime)) {
1058                 CDEBUG(D_INODE, "setting fid "DFID" mtime from %lu to %llu"
1059                        "\n", PFID(ll_inode2fid(inode)),
1060                        LTIME_S(inode->i_mtime), body->mbo_mtime);
1061                 LTIME_S(inode->i_mtime) = body->mbo_mtime;
1062         }
1063
1064         if (body->mbo_valid & OBD_MD_FLCTIME &&
1065             body->mbo_ctime > LTIME_S(inode->i_ctime))
1066                 LTIME_S(inode->i_ctime) = body->mbo_ctime;
1067 }
1068
1069 static int ll_new_node(struct inode *dir, struct dentry *dchild,
1070                        const char *tgt, umode_t mode, int rdev, __u32 opc)
1071 {
1072         struct qstr *name = &dchild->d_name;
1073         struct ptlrpc_request *request = NULL;
1074         struct md_op_data *op_data;
1075         struct inode *inode = NULL;
1076         struct ll_sb_info *sbi = ll_i2sbi(dir);
1077         int tgt_len = 0;
1078         int err;
1079
1080         ENTRY;
1081         if (unlikely(tgt != NULL))
1082                 tgt_len = strlen(tgt) + 1;
1083
1084 again:
1085         op_data = ll_prep_md_op_data(NULL, dir, NULL, name->name,
1086                                      name->len, 0, opc, NULL);
1087         if (IS_ERR(op_data))
1088                 GOTO(err_exit, err = PTR_ERR(op_data));
1089
1090         if (sbi->ll_flags & LL_SBI_FILE_SECCTX) {
1091                 err = ll_dentry_init_security(dchild, mode, &dchild->d_name,
1092                                               &op_data->op_file_secctx_name,
1093                                               &op_data->op_file_secctx,
1094                                               &op_data->op_file_secctx_size);
1095                 if (err < 0)
1096                         GOTO(err_exit, err);
1097         }
1098
1099         err = md_create(sbi->ll_md_exp, op_data, tgt, tgt_len, mode,
1100                         from_kuid(&init_user_ns, current_fsuid()),
1101                         from_kgid(&init_user_ns, current_fsgid()),
1102                         cfs_curproc_cap_pack(), rdev, &request);
1103         if (err < 0 && err != -EREMOTE)
1104                 GOTO(err_exit, err);
1105
1106         /* If the client doesn't know where to create a subdirectory (or
1107          * in case of a race that sends the RPC to the wrong MDS), the
1108          * MDS will return -EREMOTE and the client will fetch the layout
1109          * of the directory, then create the directory on the right MDT. */
1110         if (unlikely(err == -EREMOTE)) {
1111                 struct ll_inode_info    *lli = ll_i2info(dir);
1112                 struct lmv_user_md      *lum;
1113                 int                     lumsize;
1114                 int                     err2;
1115
1116                 ptlrpc_req_finished(request);
1117                 request = NULL;
1118
1119                 err2 = ll_dir_getstripe(dir, (void **)&lum, &lumsize, &request,
1120                                         OBD_MD_DEFAULT_MEA);
1121                 if (err2 == 0) {
1122                         /* Update stripe_offset and retry */
1123                         lli->lli_def_stripe_offset = lum->lum_stripe_offset;
1124                 } else if (err2 == -ENODATA &&
1125                            lli->lli_def_stripe_offset != -1) {
1126                         /* If there are no default stripe EA on the MDT, but the
1127                          * client has default stripe, then it probably means
1128                          * default stripe EA has just been deleted. */
1129                         lli->lli_def_stripe_offset = -1;
1130                 } else {
1131                         GOTO(err_exit, err);
1132                 }
1133
1134                 ptlrpc_req_finished(request);
1135                 request = NULL;
1136                 ll_finish_md_op_data(op_data);
1137                 goto again;
1138         }
1139
1140         ll_update_times(request, dir);
1141
1142         CFS_FAIL_TIMEOUT(OBD_FAIL_LLITE_NEWNODE_PAUSE, cfs_fail_val);
1143
1144         err = ll_prep_inode(&inode, request, dchild->d_sb, NULL);
1145         if (err)
1146                 GOTO(err_exit, err);
1147
1148         if (sbi->ll_flags & LL_SBI_FILE_SECCTX) {
1149                 inode_lock(inode);
1150                 /* must be done before d_instantiate, because it calls
1151                  * security_d_instantiate, which means a getxattr if security
1152                  * context is not set yet */
1153                 err = security_inode_notifysecctx(inode,
1154                                                   op_data->op_file_secctx,
1155                                                   op_data->op_file_secctx_size);
1156                 inode_unlock(inode);
1157                 if (err)
1158                         GOTO(err_exit, err);
1159         }
1160
1161         d_instantiate(dchild, inode);
1162
1163         if (!(sbi->ll_flags & LL_SBI_FILE_SECCTX)) {
1164                 err = ll_inode_init_security(dchild, inode, dir);
1165                 if (err)
1166                         GOTO(err_exit, err);
1167         }
1168
1169         EXIT;
1170 err_exit:
1171         if (request != NULL)
1172                 ptlrpc_req_finished(request);
1173
1174         if (!IS_ERR_OR_NULL(op_data))
1175                 ll_finish_md_op_data(op_data);
1176
1177         return err;
1178 }
1179
1180 static int ll_mknod(struct inode *dir, struct dentry *dchild, ll_umode_t mode,
1181                     dev_t rdev)
1182 {
1183         struct qstr *name = &dchild->d_name;
1184         int err;
1185         ENTRY;
1186
1187         CDEBUG(D_VFSTRACE, "VFS Op:name=%.*s, dir="DFID"(%p) mode %o dev %x\n",
1188                name->len, name->name, PFID(ll_inode2fid(dir)), dir,
1189                mode, rdev);
1190
1191         if (!IS_POSIXACL(dir) || !exp_connect_umask(ll_i2mdexp(dir)))
1192                 mode &= ~current_umask();
1193
1194         switch (mode & S_IFMT) {
1195         case 0:
1196                 mode |= S_IFREG; /* for mode = 0 case, fallthrough */
1197         case S_IFREG:
1198         case S_IFCHR:
1199         case S_IFBLK:
1200         case S_IFIFO:
1201         case S_IFSOCK:
1202                 err = ll_new_node(dir, dchild, NULL, mode, old_encode_dev(rdev),
1203                                   LUSTRE_OPC_MKNOD);
1204                 break;
1205         case S_IFDIR:
1206                 err = -EPERM;
1207                 break;
1208         default:
1209                 err = -EINVAL;
1210         }
1211
1212         if (!err)
1213                 ll_stats_ops_tally(ll_i2sbi(dir), LPROC_LL_MKNOD, 1);
1214
1215         RETURN(err);
1216 }
1217
1218 #ifdef HAVE_IOP_ATOMIC_OPEN
1219 /*
1220  * Plain create. Intent create is handled in atomic_open.
1221  */
1222 static int ll_create_nd(struct inode *dir, struct dentry *dentry,
1223                         umode_t mode, bool want_excl)
1224 {
1225         int rc;
1226
1227         CFS_FAIL_TIMEOUT(OBD_FAIL_LLITE_CREATE_FILE_PAUSE, cfs_fail_val);
1228
1229         CDEBUG(D_VFSTRACE, "VFS Op:name=%.*s, dir="DFID"(%p), "
1230                            "flags=%u, excl=%d\n", dentry->d_name.len,
1231                dentry->d_name.name, PFID(ll_inode2fid(dir)),
1232                dir, mode, want_excl);
1233
1234         /* Using mknod(2) to create a regular file is designed to not recognize
1235          * volatile file name, so we use ll_mknod() here. */
1236         rc = ll_mknod(dir, dentry, mode, 0);
1237
1238         ll_stats_ops_tally(ll_i2sbi(dir), LPROC_LL_CREATE, 1);
1239
1240         CDEBUG(D_VFSTRACE, "VFS Op:name=%.*s, unhashed %d\n",
1241                dentry->d_name.len, dentry->d_name.name, d_unhashed(dentry));
1242
1243         return rc;
1244 }
1245 #else /* !HAVE_IOP_ATOMIC_OPEN */
1246 static int ll_create_nd(struct inode *dir, struct dentry *dentry,
1247                         ll_umode_t mode, struct nameidata *nd)
1248 {
1249         struct ll_dentry_data *lld = ll_d2d(dentry);
1250         struct lookup_intent *it = NULL;
1251         int rc;
1252
1253         CFS_FAIL_TIMEOUT(OBD_FAIL_LLITE_CREATE_FILE_PAUSE, cfs_fail_val);
1254
1255         if (lld != NULL)
1256                 it = lld->lld_it;
1257
1258         if (!it) {
1259                 /* LU-8559: use LUSTRE_OPC_CREATE for non atomic open case
1260                  * so that volatile file name is recoginized.
1261                  * Mknod(2), however, is designed to not recognize volatile
1262                  * file name to avoid inode leak under orphan directory until
1263                  * MDT reboot */
1264                 return ll_new_node(dir, dentry, NULL, mode, 0,
1265                                    LUSTRE_OPC_CREATE);
1266         }
1267
1268         lld->lld_it = NULL;
1269
1270         /* Was there an error? Propagate it! */
1271         if (it->it_status) {
1272                 rc = it->it_status;
1273                 goto out;
1274         }
1275
1276         rc = ll_create_it(dir, dentry, it, NULL, 0);
1277         if (nd && (nd->flags & LOOKUP_OPEN) && dentry->d_inode) { /* Open */
1278                 struct file *filp;
1279
1280                 nd->intent.open.file->private_data = it;
1281                 filp = lookup_instantiate_filp(nd, dentry, NULL);
1282                 if (IS_ERR(filp))
1283                         rc = PTR_ERR(filp);
1284         }
1285
1286 out:
1287         ll_intent_release(it);
1288         OBD_FREE(it, sizeof(*it));
1289
1290         if (!rc)
1291                 ll_stats_ops_tally(ll_i2sbi(dir), LPROC_LL_CREATE, 1);
1292
1293         return rc;
1294 }
1295 #endif /* HAVE_IOP_ATOMIC_OPEN */
1296
1297 static int ll_symlink(struct inode *dir, struct dentry *dchild,
1298                       const char *oldpath)
1299 {
1300         struct qstr *name = &dchild->d_name;
1301         int err;
1302         ENTRY;
1303
1304         CDEBUG(D_VFSTRACE, "VFS Op:name=%.*s, dir="DFID"(%p), target=%.*s\n",
1305                name->len, name->name, PFID(ll_inode2fid(dir)),
1306                dir, 3000, oldpath);
1307
1308         err = ll_new_node(dir, dchild, oldpath, S_IFLNK | S_IRWXUGO, 0,
1309                           LUSTRE_OPC_SYMLINK);
1310
1311         if (!err)
1312                 ll_stats_ops_tally(ll_i2sbi(dir), LPROC_LL_SYMLINK, 1);
1313
1314         RETURN(err);
1315 }
1316
1317 static int ll_link(struct dentry *old_dentry, struct inode *dir,
1318                    struct dentry *new_dentry)
1319 {
1320         struct inode *src = old_dentry->d_inode;
1321         struct qstr *name = &new_dentry->d_name;
1322         struct ll_sb_info *sbi = ll_i2sbi(dir);
1323         struct ptlrpc_request *request = NULL;
1324         struct md_op_data *op_data;
1325         int err;
1326
1327         ENTRY;
1328         CDEBUG(D_VFSTRACE, "VFS Op: inode="DFID"(%p), dir="DFID"(%p), "
1329                "target=%.*s\n", PFID(ll_inode2fid(src)), src,
1330                PFID(ll_inode2fid(dir)), dir, name->len, name->name);
1331
1332         op_data = ll_prep_md_op_data(NULL, src, dir, name->name, name->len,
1333                                      0, LUSTRE_OPC_ANY, NULL);
1334         if (IS_ERR(op_data))
1335                 RETURN(PTR_ERR(op_data));
1336
1337         err = md_link(sbi->ll_md_exp, op_data, &request);
1338         ll_finish_md_op_data(op_data);
1339         if (err)
1340                 GOTO(out, err);
1341
1342         ll_update_times(request, dir);
1343         ll_stats_ops_tally(sbi, LPROC_LL_LINK, 1);
1344         EXIT;
1345 out:
1346         ptlrpc_req_finished(request);
1347         RETURN(err);
1348 }
1349
1350 static int ll_mkdir(struct inode *dir, struct dentry *dchild, ll_umode_t mode)
1351 {
1352         struct qstr *name = &dchild->d_name;
1353         int err;
1354         ENTRY;
1355
1356         CDEBUG(D_VFSTRACE, "VFS Op:name=%.*s, dir="DFID"(%p)\n",
1357                name->len, name->name, PFID(ll_inode2fid(dir)), dir);
1358
1359         if (!IS_POSIXACL(dir) || !exp_connect_umask(ll_i2mdexp(dir)))
1360                 mode &= ~current_umask();
1361
1362         mode = (mode & (S_IRWXUGO|S_ISVTX)) | S_IFDIR;
1363
1364         err = ll_new_node(dir, dchild, NULL, mode, 0, LUSTRE_OPC_MKDIR);
1365         if (err == 0)
1366                 ll_stats_ops_tally(ll_i2sbi(dir), LPROC_LL_MKDIR, 1);
1367
1368         RETURN(err);
1369 }
1370
1371 static int ll_rmdir(struct inode *dir, struct dentry *dchild)
1372 {
1373         struct qstr *name = &dchild->d_name;
1374         struct ptlrpc_request *request = NULL;
1375         struct md_op_data *op_data;
1376         int rc;
1377         ENTRY;
1378
1379         CDEBUG(D_VFSTRACE, "VFS Op:name=%.*s, dir="DFID"(%p)\n",
1380                name->len, name->name, PFID(ll_inode2fid(dir)), dir);
1381
1382         if (unlikely(d_mountpoint(dchild)))
1383                 RETURN(-EBUSY);
1384
1385         op_data = ll_prep_md_op_data(NULL, dir, NULL, name->name, name->len,
1386                                      S_IFDIR, LUSTRE_OPC_ANY, NULL);
1387         if (IS_ERR(op_data))
1388                 RETURN(PTR_ERR(op_data));
1389
1390         if (dchild->d_inode != NULL)
1391                 op_data->op_fid3 = *ll_inode2fid(dchild->d_inode);
1392
1393         op_data->op_fid2 = op_data->op_fid3;
1394         rc = md_unlink(ll_i2sbi(dir)->ll_md_exp, op_data, &request);
1395         ll_finish_md_op_data(op_data);
1396         if (rc == 0) {
1397                 ll_update_times(request, dir);
1398                 ll_stats_ops_tally(ll_i2sbi(dir), LPROC_LL_RMDIR, 1);
1399         }
1400
1401         ptlrpc_req_finished(request);
1402         RETURN(rc);
1403 }
1404
1405 /**
1406  * Remove dir entry
1407  **/
1408 int ll_rmdir_entry(struct inode *dir, char *name, int namelen)
1409 {
1410         struct ptlrpc_request *request = NULL;
1411         struct md_op_data *op_data;
1412         int rc;
1413         ENTRY;
1414
1415         CDEBUG(D_VFSTRACE, "VFS Op:name=%.*s, dir="DFID"(%p)\n",
1416                namelen, name, PFID(ll_inode2fid(dir)), dir);
1417
1418         op_data = ll_prep_md_op_data(NULL, dir, NULL, name, strlen(name),
1419                                      S_IFDIR, LUSTRE_OPC_ANY, NULL);
1420         if (IS_ERR(op_data))
1421                 RETURN(PTR_ERR(op_data));
1422         op_data->op_cli_flags |= CLI_RM_ENTRY;
1423         rc = md_unlink(ll_i2sbi(dir)->ll_md_exp, op_data, &request);
1424         ll_finish_md_op_data(op_data);
1425         if (rc == 0) {
1426                 ll_update_times(request, dir);
1427                 ll_stats_ops_tally(ll_i2sbi(dir), LPROC_LL_RMDIR, 1);
1428         }
1429
1430         ptlrpc_req_finished(request);
1431         RETURN(rc);
1432 }
1433
1434 static int ll_unlink(struct inode *dir, struct dentry *dchild)
1435 {
1436         struct qstr *name = &dchild->d_name;
1437         struct ptlrpc_request *request = NULL;
1438         struct md_op_data *op_data;
1439         struct mdt_body *body;
1440         int rc;
1441         ENTRY;
1442         CDEBUG(D_VFSTRACE, "VFS Op:name=%.*s, dir="DFID"(%p)\n",
1443                name->len, name->name, PFID(ll_inode2fid(dir)), dir);
1444
1445         /*
1446          * XXX: unlink bind mountpoint maybe call to here,
1447          * just check it as vfs_unlink does.
1448          */
1449         if (unlikely(d_mountpoint(dchild)))
1450                 RETURN(-EBUSY);
1451
1452         op_data = ll_prep_md_op_data(NULL, dir, NULL, name->name, name->len, 0,
1453                                      LUSTRE_OPC_ANY, NULL);
1454         if (IS_ERR(op_data))
1455                 RETURN(PTR_ERR(op_data));
1456
1457         op_data->op_fid3 = *ll_inode2fid(dchild->d_inode);
1458
1459         op_data->op_fid2 = op_data->op_fid3;
1460         rc = md_unlink(ll_i2sbi(dir)->ll_md_exp, op_data, &request);
1461         ll_finish_md_op_data(op_data);
1462         if (rc)
1463                 GOTO(out, rc);
1464
1465         /*
1466          * The server puts attributes in on the last unlink, use them to update
1467          * the link count so the inode can be freed immediately.
1468          */
1469         body = req_capsule_server_get(&request->rq_pill, &RMF_MDT_BODY);
1470         if (body->mbo_valid & OBD_MD_FLNLINK)
1471                 set_nlink(dchild->d_inode, body->mbo_nlink);
1472
1473         ll_update_times(request, dir);
1474         ll_stats_ops_tally(ll_i2sbi(dir), LPROC_LL_UNLINK, 1);
1475
1476 out:
1477         ptlrpc_req_finished(request);
1478         RETURN(rc);
1479 }
1480
1481 static int ll_rename(struct inode *src, struct dentry *src_dchild,
1482                      struct inode *tgt, struct dentry *tgt_dchild
1483 #ifdef HAVE_IOPS_RENAME_WITH_FLAGS
1484                      , unsigned int flags
1485 #endif
1486                      )
1487 {
1488         struct qstr *src_name = &src_dchild->d_name;
1489         struct qstr *tgt_name = &tgt_dchild->d_name;
1490         struct ptlrpc_request *request = NULL;
1491         struct ll_sb_info *sbi = ll_i2sbi(src);
1492         struct md_op_data *op_data;
1493         int err;
1494         ENTRY;
1495
1496 #ifdef HAVE_IOPS_RENAME_WITH_FLAGS
1497         if (flags)
1498                 return -EINVAL;
1499 #endif
1500
1501         CDEBUG(D_VFSTRACE, "VFS Op:oldname=%.*s, src_dir="DFID
1502                "(%p), newname=%.*s, tgt_dir="DFID"(%p)\n",
1503                src_name->len, src_name->name,
1504                PFID(ll_inode2fid(src)), src, tgt_name->len,
1505                tgt_name->name, PFID(ll_inode2fid(tgt)), tgt);
1506
1507         if (unlikely(d_mountpoint(src_dchild) || d_mountpoint(tgt_dchild)))
1508                 RETURN(-EBUSY);
1509
1510         op_data = ll_prep_md_op_data(NULL, src, tgt, NULL, 0, 0,
1511                                      LUSTRE_OPC_ANY, NULL);
1512         if (IS_ERR(op_data))
1513                 RETURN(PTR_ERR(op_data));
1514
1515         if (src_dchild->d_inode != NULL)
1516                 op_data->op_fid3 = *ll_inode2fid(src_dchild->d_inode);
1517
1518         if (tgt_dchild->d_inode != NULL)
1519                 op_data->op_fid4 = *ll_inode2fid(tgt_dchild->d_inode);
1520
1521         err = md_rename(sbi->ll_md_exp, op_data,
1522                         src_name->name, src_name->len,
1523                         tgt_name->name, tgt_name->len, &request);
1524         ll_finish_md_op_data(op_data);
1525         if (!err) {
1526                 ll_update_times(request, src);
1527                 ll_update_times(request, tgt);
1528                 ll_stats_ops_tally(sbi, LPROC_LL_RENAME, 1);
1529         }
1530
1531         ptlrpc_req_finished(request);
1532
1533         if (err == 0)
1534                 d_move(src_dchild, tgt_dchild);
1535
1536         RETURN(err);
1537 }
1538
1539 const struct inode_operations ll_dir_inode_operations = {
1540         .mknod          = ll_mknod,
1541 #ifdef HAVE_IOP_ATOMIC_OPEN
1542         .atomic_open    = ll_atomic_open,
1543 #endif
1544         .lookup         = ll_lookup_nd,
1545         .create         = ll_create_nd,
1546         /* We need all these non-raw things for NFSD, to not patch it. */
1547         .unlink         = ll_unlink,
1548         .mkdir          = ll_mkdir,
1549         .rmdir          = ll_rmdir,
1550         .symlink        = ll_symlink,
1551         .link           = ll_link,
1552         .rename         = ll_rename,
1553         .setattr        = ll_setattr,
1554         .getattr        = ll_getattr,
1555         .permission     = ll_inode_permission,
1556 #ifdef HAVE_IOP_XATTR
1557         .setxattr       = ll_setxattr,
1558         .getxattr       = ll_getxattr,
1559         .removexattr    = ll_removexattr,
1560 #endif
1561         .listxattr      = ll_listxattr,
1562 #ifdef HAVE_IOP_GET_ACL
1563         .get_acl        = ll_get_acl,
1564 #endif
1565 #ifdef HAVE_IOP_SET_ACL
1566         .set_acl        = ll_set_acl,
1567 #endif
1568 };
1569
1570 const struct inode_operations ll_special_inode_operations = {
1571         .setattr        = ll_setattr,
1572         .getattr        = ll_getattr,
1573         .permission     = ll_inode_permission,
1574 #ifdef HAVE_IOP_XATTR
1575         .setxattr       = ll_setxattr,
1576         .getxattr       = ll_getxattr,
1577         .removexattr    = ll_removexattr,
1578 #endif
1579         .listxattr      = ll_listxattr,
1580 #ifdef HAVE_IOP_GET_ACL
1581         .get_acl        = ll_get_acl,
1582 #endif
1583 #ifdef HAVE_IOP_SET_ACL
1584         .set_acl        = ll_set_acl,
1585 #endif
1586 };