1 /*
2 * GPL HEADER START
3 *
4 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2 only,
8 * as published by the Free Software Foundation.
9 *
10 * This program is distributed in the hope that it will be useful, but
11 * WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * General Public License version 2 for more details (a copy is included
14 * in the LICENSE file that accompanied this code).
15 *
16 * You should have received a copy of the GNU General Public License
17 * version 2 along with this program; If not, see
18 * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
19 *
20 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
21 * CA 95054 USA or visit www.sun.com if you need additional information or
22 * have any questions.
23 *
24 * GPL HEADER END
25 */
26 /*
27 * Copyright (c) 2002, 2010, Oracle and/or its affiliates. All rights reserved.
28 * Use is subject to license terms.
29 *
30 * Copyright (c) 2011, 2012, Intel Corporation.
31 */
32 /*
33 * This file is part of Lustre, http://www.lustre.org/
34 * Lustre is a trademark of Sun Microsystems, Inc.
35 */
36
37 #include <linux/fs.h>
38 #include <linux/sched.h>
39 #include <linux/mm.h>
40 #include <linux/quotaops.h>
41 #include <linux/highmem.h>
42 #include <linux/pagemap.h>
43 #include <linux/security.h>
44
45 #define DEBUG_SUBSYSTEM S_LLITE
46
47 #include "../include/obd_support.h"
48 #include "../include/lustre_fid.h"
49 #include "../include/lustre_lite.h"
50 #include "../include/lustre_dlm.h"
51 #include "../include/lustre_ver.h"
52 #include "llite_internal.h"
53
54 static int ll_create_it(struct inode *, struct dentry *,
55 int, struct lookup_intent *);
56
57 /* called from iget5_locked->find_inode() under inode_hash_lock spinlock */
ll_test_inode(struct inode * inode,void * opaque)58 static int ll_test_inode(struct inode *inode, void *opaque)
59 {
60 struct ll_inode_info *lli = ll_i2info(inode);
61 struct lustre_md *md = opaque;
62
63 if (unlikely(!(md->body->valid & OBD_MD_FLID))) {
64 CERROR("MDS body missing FID\n");
65 return 0;
66 }
67
68 if (!lu_fid_eq(&lli->lli_fid, &md->body->fid1))
69 return 0;
70
71 return 1;
72 }
73
ll_set_inode(struct inode * inode,void * opaque)74 static int ll_set_inode(struct inode *inode, void *opaque)
75 {
76 struct ll_inode_info *lli = ll_i2info(inode);
77 struct mdt_body *body = ((struct lustre_md *)opaque)->body;
78
79 if (unlikely(!(body->valid & OBD_MD_FLID))) {
80 CERROR("MDS body missing FID\n");
81 return -EINVAL;
82 }
83
84 lli->lli_fid = body->fid1;
85 if (unlikely(!(body->valid & OBD_MD_FLTYPE))) {
86 CERROR("Can not initialize inode " DFID
87 " without object type: valid = %#llx\n",
88 PFID(&lli->lli_fid), body->valid);
89 return -EINVAL;
90 }
91
92 inode->i_mode = (inode->i_mode & ~S_IFMT) | (body->mode & S_IFMT);
93 if (unlikely(inode->i_mode == 0)) {
94 CERROR("Invalid inode "DFID" type\n", PFID(&lli->lli_fid));
95 return -EINVAL;
96 }
97
98 ll_lli_init(lli);
99
100 return 0;
101 }
102
103
104 /*
105 * Get an inode by inode number (already instantiated by the intent lookup).
106 * Returns inode or NULL
107 */
ll_iget(struct super_block * sb,ino_t hash,struct lustre_md * md)108 struct inode *ll_iget(struct super_block *sb, ino_t hash,
109 struct lustre_md *md)
110 {
111 struct inode *inode;
112
113 LASSERT(hash != 0);
114 inode = iget5_locked(sb, hash, ll_test_inode, ll_set_inode, md);
115
116 if (inode) {
117 if (inode->i_state & I_NEW) {
118 int rc = 0;
119
120 ll_read_inode2(inode, md);
121 if (S_ISREG(inode->i_mode) &&
122 ll_i2info(inode)->lli_clob == NULL) {
123 CDEBUG(D_INODE,
124 "%s: apply lsm %p to inode "DFID".\n",
125 ll_get_fsname(sb, NULL, 0), md->lsm,
126 PFID(ll_inode2fid(inode)));
127 rc = cl_file_inode_init(inode, md);
128 }
129 if (rc != 0) {
130 make_bad_inode(inode);
131 unlock_new_inode(inode);
132 iput(inode);
133 inode = ERR_PTR(rc);
134 } else
135 unlock_new_inode(inode);
136 } else if (!(inode->i_state & (I_FREEING | I_CLEAR)))
137 ll_update_inode(inode, md);
138 CDEBUG(D_VFSTRACE, "got inode: %p for "DFID"\n",
139 inode, PFID(&md->body->fid1));
140 }
141 return inode;
142 }
143
ll_invalidate_negative_children(struct inode * dir)144 static void ll_invalidate_negative_children(struct inode *dir)
145 {
146 struct dentry *dentry, *tmp_subdir;
147 struct ll_d_hlist_node *p;
148
149 ll_lock_dcache(dir);
150 ll_d_hlist_for_each_entry(dentry, p, &dir->i_dentry, d_u.d_alias) {
151 spin_lock(&dentry->d_lock);
152 if (!list_empty(&dentry->d_subdirs)) {
153 struct dentry *child;
154
155 list_for_each_entry_safe(child, tmp_subdir,
156 &dentry->d_subdirs,
157 d_child) {
158 if (d_really_is_negative(child))
159 d_lustre_invalidate(child, 1);
160 }
161 }
162 spin_unlock(&dentry->d_lock);
163 }
164 ll_unlock_dcache(dir);
165 }
166
ll_md_blocking_ast(struct ldlm_lock * lock,struct ldlm_lock_desc * desc,void * data,int flag)167 int ll_md_blocking_ast(struct ldlm_lock *lock, struct ldlm_lock_desc *desc,
168 void *data, int flag)
169 {
170 struct lustre_handle lockh;
171 int rc;
172
173 switch (flag) {
174 case LDLM_CB_BLOCKING:
175 ldlm_lock2handle(lock, &lockh);
176 rc = ldlm_cli_cancel(&lockh, LCF_ASYNC);
177 if (rc < 0) {
178 CDEBUG(D_INODE, "ldlm_cli_cancel: rc = %d\n", rc);
179 return rc;
180 }
181 break;
182 case LDLM_CB_CANCELING: {
183 struct inode *inode = ll_inode_from_resource_lock(lock);
184 __u64 bits = lock->l_policy_data.l_inodebits.bits;
185
186 /* Inode is set to lock->l_resource->lr_lvb_inode
187 * for mdc - bug 24555 */
188 LASSERT(lock->l_ast_data == NULL);
189
190 if (inode == NULL)
191 break;
192
193 /* Invalidate all dentries associated with this inode */
194 LASSERT(lock->l_flags & LDLM_FL_CANCELING);
195
196 if (!fid_res_name_eq(ll_inode2fid(inode),
197 &lock->l_resource->lr_name)) {
198 LDLM_ERROR(lock, "data mismatch with object "DFID"(%p)",
199 PFID(ll_inode2fid(inode)), inode);
200 LBUG();
201 }
202
203 if (bits & MDS_INODELOCK_XATTR) {
204 ll_xattr_cache_destroy(inode);
205 bits &= ~MDS_INODELOCK_XATTR;
206 }
207
208 /* For OPEN locks we differentiate between lock modes
209 * LCK_CR, LCK_CW, LCK_PR - bug 22891 */
210 if (bits & MDS_INODELOCK_OPEN)
211 ll_have_md_lock(inode, &bits, lock->l_req_mode);
212
213 if (bits & MDS_INODELOCK_OPEN) {
214 fmode_t fmode;
215
216 switch (lock->l_req_mode) {
217 case LCK_CW:
218 fmode = FMODE_WRITE;
219 break;
220 case LCK_PR:
221 fmode = FMODE_EXEC;
222 break;
223 case LCK_CR:
224 fmode = FMODE_READ;
225 break;
226 default:
227 LDLM_ERROR(lock, "bad lock mode for OPEN lock");
228 LBUG();
229 }
230
231 ll_md_real_close(inode, fmode);
232 }
233
234 if (bits & (MDS_INODELOCK_LOOKUP | MDS_INODELOCK_UPDATE |
235 MDS_INODELOCK_LAYOUT | MDS_INODELOCK_PERM))
236 ll_have_md_lock(inode, &bits, LCK_MINMODE);
237
238 if (bits & MDS_INODELOCK_LAYOUT) {
239 struct cl_object_conf conf = {
240 .coc_opc = OBJECT_CONF_INVALIDATE,
241 .coc_inode = inode,
242 };
243
244 rc = ll_layout_conf(inode, &conf);
245 if (rc < 0)
246 CDEBUG(D_INODE, "cannot invalidate layout of "
247 DFID": rc = %d\n",
248 PFID(ll_inode2fid(inode)), rc);
249 }
250
251 if (bits & MDS_INODELOCK_UPDATE) {
252 struct ll_inode_info *lli = ll_i2info(inode);
253
254 spin_lock(&lli->lli_lock);
255 lli->lli_flags &= ~LLIF_MDS_SIZE_LOCK;
256 spin_unlock(&lli->lli_lock);
257 }
258
259 if ((bits & MDS_INODELOCK_UPDATE) && S_ISDIR(inode->i_mode)) {
260 CDEBUG(D_INODE, "invalidating inode %lu\n",
261 inode->i_ino);
262 truncate_inode_pages(inode->i_mapping, 0);
263 ll_invalidate_negative_children(inode);
264 }
265
266 if ((bits & (MDS_INODELOCK_LOOKUP | MDS_INODELOCK_PERM)) &&
267 inode->i_sb->s_root != NULL &&
268 !is_root_inode(inode))
269 ll_invalidate_aliases(inode);
270
271 iput(inode);
272 break;
273 }
274 default:
275 LBUG();
276 }
277
278 return 0;
279 }
280
ll_i2suppgid(struct inode * i)281 __u32 ll_i2suppgid(struct inode *i)
282 {
283 if (in_group_p(i->i_gid))
284 return (__u32)from_kgid(&init_user_ns, i->i_gid);
285 else
286 return (__u32)(-1);
287 }
288
289 /* Pack the required supplementary groups into the supplied groups array.
290 * If we don't need to use the groups from the target inode(s) then we
291 * instead pack one or more groups from the user's supplementary group
292 * array in case it might be useful. Not needed if doing an MDS-side upcall. */
ll_i2gids(__u32 * suppgids,struct inode * i1,struct inode * i2)293 void ll_i2gids(__u32 *suppgids, struct inode *i1, struct inode *i2)
294 {
295 #if 0
296 int i;
297 #endif
298
299 LASSERT(i1 != NULL);
300 LASSERT(suppgids != NULL);
301
302 suppgids[0] = ll_i2suppgid(i1);
303
304 if (i2)
305 suppgids[1] = ll_i2suppgid(i2);
306 else
307 suppgids[1] = -1;
308
309 #if 0
310 for (i = 0; i < current_ngroups; i++) {
311 if (suppgids[0] == -1) {
312 if (current_groups[i] != suppgids[1])
313 suppgids[0] = current_groups[i];
314 continue;
315 }
316 if (suppgids[1] == -1) {
317 if (current_groups[i] != suppgids[0])
318 suppgids[1] = current_groups[i];
319 continue;
320 }
321 break;
322 }
323 #endif
324 }
325
326 /*
327 * try to reuse three types of dentry:
328 * 1. unhashed alias, this one is unhashed by d_invalidate (but it may be valid
329 * by concurrent .revalidate).
330 * 2. INVALID alias (common case for no valid ldlm lock held, but this flag may
331 * be cleared by others calling d_lustre_revalidate).
332 * 3. DISCONNECTED alias.
333 */
ll_find_alias(struct inode * inode,struct dentry * dentry)334 static struct dentry *ll_find_alias(struct inode *inode, struct dentry *dentry)
335 {
336 struct dentry *alias, *discon_alias, *invalid_alias;
337 struct ll_d_hlist_node *p;
338
339 if (ll_d_hlist_empty(&inode->i_dentry))
340 return NULL;
341
342 discon_alias = invalid_alias = NULL;
343
344 ll_lock_dcache(inode);
345 ll_d_hlist_for_each_entry(alias, p, &inode->i_dentry, d_u.d_alias) {
346 LASSERT(alias != dentry);
347
348 spin_lock(&alias->d_lock);
349 if (alias->d_flags & DCACHE_DISCONNECTED)
350 /* LASSERT(last_discon == NULL); LU-405, bz 20055 */
351 discon_alias = alias;
352 else if (alias->d_parent == dentry->d_parent &&
353 alias->d_name.hash == dentry->d_name.hash &&
354 alias->d_name.len == dentry->d_name.len &&
355 memcmp(alias->d_name.name, dentry->d_name.name,
356 dentry->d_name.len) == 0)
357 invalid_alias = alias;
358 spin_unlock(&alias->d_lock);
359
360 if (invalid_alias)
361 break;
362 }
363 alias = invalid_alias ?: discon_alias ?: NULL;
364 if (alias) {
365 spin_lock(&alias->d_lock);
366 dget_dlock(alias);
367 spin_unlock(&alias->d_lock);
368 }
369 ll_unlock_dcache(inode);
370
371 return alias;
372 }
373
374 /*
375 * Similar to d_splice_alias(), but lustre treats invalid alias
376 * similar to DCACHE_DISCONNECTED, and tries to use it anyway.
377 */
ll_splice_alias(struct inode * inode,struct dentry * de)378 struct dentry *ll_splice_alias(struct inode *inode, struct dentry *de)
379 {
380 struct dentry *new;
381 int rc;
382
383 if (inode) {
384 new = ll_find_alias(inode, de);
385 if (new) {
386 rc = ll_d_init(new);
387 if (rc < 0) {
388 dput(new);
389 return ERR_PTR(rc);
390 }
391 d_move(new, de);
392 iput(inode);
393 CDEBUG(D_DENTRY,
394 "Reuse dentry %p inode %p refc %d flags %#x\n",
395 new, d_inode(new), d_count(new), new->d_flags);
396 return new;
397 }
398 }
399 rc = ll_d_init(de);
400 if (rc < 0)
401 return ERR_PTR(rc);
402 d_add(de, inode);
403 CDEBUG(D_DENTRY, "Add dentry %p inode %p refc %d flags %#x\n",
404 de, d_inode(de), d_count(de), de->d_flags);
405 return de;
406 }
407
ll_lookup_it_finish(struct ptlrpc_request * request,struct lookup_intent * it,struct inode * parent,struct dentry ** de)408 static int ll_lookup_it_finish(struct ptlrpc_request *request,
409 struct lookup_intent *it,
410 struct inode *parent, struct dentry **de)
411 {
412 struct inode *inode = NULL;
413 __u64 bits = 0;
414 int rc;
415
416 /* NB 1 request reference will be taken away by ll_intent_lock()
417 * when I return */
418 CDEBUG(D_DENTRY, "it %p it_disposition %x\n", it,
419 it->d.lustre.it_disposition);
420 if (!it_disposition(it, DISP_LOOKUP_NEG)) {
421 rc = ll_prep_inode(&inode, request, (*de)->d_sb, it);
422 if (rc)
423 return rc;
424
425 ll_set_lock_data(ll_i2sbi(parent)->ll_md_exp, inode, it, &bits);
426
427 /* We used to query real size from OSTs here, but actually
428 this is not needed. For stat() calls size would be updated
429 from subsequent do_revalidate()->ll_inode_revalidate_it() in
430 2.4 and
431 vfs_getattr_it->ll_getattr()->ll_inode_revalidate_it() in 2.6
432 Everybody else who needs correct file size would call
433 ll_glimpse_size or some equivalent themselves anyway.
434 Also see bug 7198. */
435 }
436
437 /* Only hash *de if it is unhashed (new dentry).
438 * Atoimc_open may passing hashed dentries for open.
439 */
440 if (d_unhashed(*de)) {
441 struct dentry *alias;
442
443 alias = ll_splice_alias(inode, *de);
444 if (IS_ERR(alias))
445 return PTR_ERR(alias);
446 *de = alias;
447 } else if (!it_disposition(it, DISP_LOOKUP_NEG) &&
448 !it_disposition(it, DISP_OPEN_CREATE)) {
449 /* With DISP_OPEN_CREATE dentry will
450 instantiated in ll_create_it. */
451 LASSERT(d_inode(*de) == NULL);
452 d_instantiate(*de, inode);
453 }
454
455 if (!it_disposition(it, DISP_LOOKUP_NEG)) {
456 /* we have lookup look - unhide dentry */
457 if (bits & MDS_INODELOCK_LOOKUP)
458 d_lustre_revalidate(*de);
459 } else if (!it_disposition(it, DISP_OPEN_CREATE)) {
460 /* If file created on server, don't depend on parent UPDATE
461 * lock to unhide it. It is left hidden and next lookup can
462 * find it in ll_splice_alias.
463 */
464 /* Check that parent has UPDATE lock. */
465 struct lookup_intent parent_it = {
466 .it_op = IT_GETATTR,
467 .d.lustre.it_lock_handle = 0 };
468
469 if (md_revalidate_lock(ll_i2mdexp(parent), &parent_it,
470 &ll_i2info(parent)->lli_fid, NULL)) {
471 d_lustre_revalidate(*de);
472 ll_intent_release(&parent_it);
473 }
474 }
475
476 return 0;
477 }
478
ll_lookup_it(struct inode * parent,struct dentry * dentry,struct lookup_intent * it,int lookup_flags)479 static struct dentry *ll_lookup_it(struct inode *parent, struct dentry *dentry,
480 struct lookup_intent *it, int lookup_flags)
481 {
482 struct lookup_intent lookup_it = { .it_op = IT_LOOKUP };
483 struct dentry *save = dentry, *retval;
484 struct ptlrpc_request *req = NULL;
485 struct inode *inode;
486 struct md_op_data *op_data;
487 __u32 opc;
488 int rc;
489
490 if (dentry->d_name.len > ll_i2sbi(parent)->ll_namelen)
491 return ERR_PTR(-ENAMETOOLONG);
492
493 CDEBUG(D_VFSTRACE, "VFS Op:name=%pd,dir=%lu/%u(%p),intent=%s\n",
494 dentry, parent->i_ino,
495 parent->i_generation, parent, LL_IT2STR(it));
496
497 if (d_mountpoint(dentry))
498 CERROR("Tell Peter, lookup on mtpt, it %s\n", LL_IT2STR(it));
499
500 if (it == NULL || it->it_op == IT_GETXATTR)
501 it = &lookup_it;
502
503 if (it->it_op == IT_GETATTR) {
504 rc = ll_statahead_enter(parent, &dentry, 0);
505 if (rc == 1) {
506 if (dentry == save)
507 retval = NULL;
508 else
509 retval = dentry;
510 goto out;
511 }
512 }
513
514 if (it->it_op & IT_CREAT)
515 opc = LUSTRE_OPC_CREATE;
516 else
517 opc = LUSTRE_OPC_ANY;
518
519 op_data = ll_prep_md_op_data(NULL, parent, NULL, dentry->d_name.name,
520 dentry->d_name.len, lookup_flags, opc,
521 NULL);
522 if (IS_ERR(op_data))
523 return (void *)op_data;
524
525 /* enforce umask if acl disabled or MDS doesn't support umask */
526 if (!IS_POSIXACL(parent) || !exp_connect_umask(ll_i2mdexp(parent)))
527 it->it_create_mode &= ~current_umask();
528
529 rc = md_intent_lock(ll_i2mdexp(parent), op_data, NULL, 0, it,
530 lookup_flags, &req, ll_md_blocking_ast, 0);
531 ll_finish_md_op_data(op_data);
532 if (rc < 0) {
533 retval = ERR_PTR(rc);
534 goto out;
535 }
536
537 rc = ll_lookup_it_finish(req, it, parent, &dentry);
538 if (rc != 0) {
539 ll_intent_release(it);
540 retval = ERR_PTR(rc);
541 goto out;
542 }
543
544 inode = d_inode(dentry);
545 if ((it->it_op & IT_OPEN) && inode &&
546 !S_ISREG(inode->i_mode) &&
547 !S_ISDIR(inode->i_mode)) {
548 ll_release_openhandle(inode, it);
549 }
550 ll_lookup_finish_locks(it, inode);
551
552 if (dentry == save)
553 retval = NULL;
554 else
555 retval = dentry;
556 goto out;
557 out:
558 if (req)
559 ptlrpc_req_finished(req);
560 if (it->it_op == IT_GETATTR && (retval == NULL || retval == dentry))
561 ll_statahead_mark(parent, dentry);
562 return retval;
563 }
564
ll_lookup_nd(struct inode * parent,struct dentry * dentry,unsigned int flags)565 static struct dentry *ll_lookup_nd(struct inode *parent, struct dentry *dentry,
566 unsigned int flags)
567 {
568 struct lookup_intent *itp, it = { .it_op = IT_GETATTR };
569 struct dentry *de;
570
571 CDEBUG(D_VFSTRACE, "VFS Op:name=%pd,dir=%lu/%u(%p),flags=%u\n",
572 dentry, parent->i_ino,
573 parent->i_generation, parent, flags);
574
575 /* Optimize away (CREATE && !OPEN). Let .create handle the race. */
576 if ((flags & LOOKUP_CREATE) && !(flags & LOOKUP_OPEN))
577 return NULL;
578
579 if (flags & (LOOKUP_PARENT|LOOKUP_OPEN|LOOKUP_CREATE))
580 itp = NULL;
581 else
582 itp = ⁢
583 de = ll_lookup_it(parent, dentry, itp, 0);
584
585 if (itp != NULL)
586 ll_intent_release(itp);
587
588 return de;
589 }
590
591 /*
592 * For cached negative dentry and new dentry, handle lookup/create/open
593 * together.
594 */
ll_atomic_open(struct inode * dir,struct dentry * dentry,struct file * file,unsigned open_flags,umode_t mode,int * opened)595 static int ll_atomic_open(struct inode *dir, struct dentry *dentry,
596 struct file *file, unsigned open_flags,
597 umode_t mode, int *opened)
598 {
599 struct lookup_intent *it;
600 struct dentry *de;
601 long long lookup_flags = LOOKUP_OPEN;
602 int rc = 0;
603
604 CDEBUG(D_VFSTRACE,
605 "VFS Op:name=%pd,dir=%lu/%u(%p),file %p,open_flags %x,mode %x opened %d\n",
606 dentry, dir->i_ino,
607 dir->i_generation, dir, file, open_flags, mode, *opened);
608
609 it = kzalloc(sizeof(*it), GFP_NOFS);
610 if (!it)
611 return -ENOMEM;
612
613 it->it_op = IT_OPEN;
614 if (open_flags & O_CREAT) {
615 it->it_op |= IT_CREAT;
616 lookup_flags |= LOOKUP_CREATE;
617 }
618 it->it_create_mode = (mode & S_IALLUGO) | S_IFREG;
619 it->it_flags = (open_flags & ~O_ACCMODE) | OPEN_FMODE(open_flags);
620
621 /* Dentry added to dcache tree in ll_lookup_it */
622 de = ll_lookup_it(dir, dentry, it, lookup_flags);
623 if (IS_ERR(de))
624 rc = PTR_ERR(de);
625 else if (de != NULL)
626 dentry = de;
627
628 if (!rc) {
629 if (it_disposition(it, DISP_OPEN_CREATE)) {
630 /* Dentry instantiated in ll_create_it. */
631 rc = ll_create_it(dir, dentry, mode, it);
632 if (rc) {
633 /* We dget in ll_splice_alias. */
634 if (de != NULL)
635 dput(de);
636 goto out_release;
637 }
638
639 *opened |= FILE_CREATED;
640 }
641 if (d_really_is_positive(dentry) && it_disposition(it, DISP_OPEN_OPEN)) {
642 /* Open dentry. */
643 if (S_ISFIFO(d_inode(dentry)->i_mode)) {
644 /* We cannot call open here as it would
645 * deadlock.
646 */
647 if (it_disposition(it, DISP_ENQ_OPEN_REF))
648 ptlrpc_req_finished(
649 (struct ptlrpc_request *)
650 it->d.lustre.it_data);
651 rc = finish_no_open(file, de);
652 } else {
653 file->private_data = it;
654 rc = finish_open(file, dentry, NULL, opened);
655 /* We dget in ll_splice_alias. finish_open takes
656 * care of dget for fd open.
657 */
658 if (de != NULL)
659 dput(de);
660 }
661 } else {
662 rc = finish_no_open(file, de);
663 }
664 }
665
666 out_release:
667 ll_intent_release(it);
668 OBD_FREE(it, sizeof(*it));
669
670 return rc;
671 }
672
673
674 /* We depend on "mode" being set with the proper file type/umask by now */
ll_create_node(struct inode * dir,struct lookup_intent * it)675 static struct inode *ll_create_node(struct inode *dir, struct lookup_intent *it)
676 {
677 struct inode *inode = NULL;
678 struct ptlrpc_request *request = NULL;
679 struct ll_sb_info *sbi = ll_i2sbi(dir);
680 int rc;
681
682 LASSERT(it && it->d.lustre.it_disposition);
683
684 LASSERT(it_disposition(it, DISP_ENQ_CREATE_REF));
685 request = it->d.lustre.it_data;
686 it_clear_disposition(it, DISP_ENQ_CREATE_REF);
687 rc = ll_prep_inode(&inode, request, dir->i_sb, it);
688 if (rc) {
689 inode = ERR_PTR(rc);
690 goto out;
691 }
692
693 LASSERT(ll_d_hlist_empty(&inode->i_dentry));
694
695 /* We asked for a lock on the directory, but were granted a
696 * lock on the inode. Since we finally have an inode pointer,
697 * stuff it in the lock. */
698 CDEBUG(D_DLMTRACE, "setting l_ast_data to inode %p (%lu/%u)\n",
699 inode, inode->i_ino, inode->i_generation);
700 ll_set_lock_data(sbi->ll_md_exp, inode, it, NULL);
701 out:
702 ptlrpc_req_finished(request);
703 return inode;
704 }
705
706 /*
707 * By the time this is called, we already have created the directory cache
708 * entry for the new file, but it is so far negative - it has no inode.
709 *
710 * We defer creating the OBD object(s) until open, to keep the intent and
711 * non-intent code paths similar, and also because we do not have the MDS
712 * inode number before calling ll_create_node() (which is needed for LOV),
713 * so we would need to do yet another RPC to the MDS to store the LOV EA
714 * data on the MDS. If needed, we would pass the PACKED lmm as data and
715 * lmm_size in datalen (the MDS still has code which will handle that).
716 *
717 * If the create succeeds, we fill in the inode information
718 * with d_instantiate().
719 */
ll_create_it(struct inode * dir,struct dentry * dentry,int mode,struct lookup_intent * it)720 static int ll_create_it(struct inode *dir, struct dentry *dentry, int mode,
721 struct lookup_intent *it)
722 {
723 struct inode *inode;
724 int rc = 0;
725
726 CDEBUG(D_VFSTRACE, "VFS Op:name=%pd,dir=%lu/%u(%p),intent=%s\n",
727 dentry, dir->i_ino,
728 dir->i_generation, dir, LL_IT2STR(it));
729
730 rc = it_open_error(DISP_OPEN_CREATE, it);
731 if (rc)
732 return rc;
733
734 inode = ll_create_node(dir, it);
735 if (IS_ERR(inode))
736 return PTR_ERR(inode);
737
738 d_instantiate(dentry, inode);
739 return 0;
740 }
741
ll_update_times(struct ptlrpc_request * request,struct inode * inode)742 static void ll_update_times(struct ptlrpc_request *request,
743 struct inode *inode)
744 {
745 struct mdt_body *body = req_capsule_server_get(&request->rq_pill,
746 &RMF_MDT_BODY);
747
748 LASSERT(body);
749 if (body->valid & OBD_MD_FLMTIME &&
750 body->mtime > LTIME_S(inode->i_mtime)) {
751 CDEBUG(D_INODE, "setting ino %lu mtime from %lu to %llu\n",
752 inode->i_ino, LTIME_S(inode->i_mtime), body->mtime);
753 LTIME_S(inode->i_mtime) = body->mtime;
754 }
755 if (body->valid & OBD_MD_FLCTIME &&
756 body->ctime > LTIME_S(inode->i_ctime))
757 LTIME_S(inode->i_ctime) = body->ctime;
758 }
759
ll_new_node(struct inode * dir,struct dentry * dentry,const char * tgt,int mode,int rdev,__u32 opc)760 static int ll_new_node(struct inode *dir, struct dentry *dentry,
761 const char *tgt, int mode, int rdev,
762 __u32 opc)
763 {
764 struct ptlrpc_request *request = NULL;
765 struct md_op_data *op_data;
766 struct inode *inode = NULL;
767 struct ll_sb_info *sbi = ll_i2sbi(dir);
768 int tgt_len = 0;
769 int err;
770
771 if (unlikely(tgt != NULL))
772 tgt_len = strlen(tgt) + 1;
773
774 op_data = ll_prep_md_op_data(NULL, dir, NULL,
775 dentry->d_name.name,
776 dentry->d_name.len,
777 0, opc, NULL);
778 if (IS_ERR(op_data)) {
779 err = PTR_ERR(op_data);
780 goto err_exit;
781 }
782
783 err = md_create(sbi->ll_md_exp, op_data, tgt, tgt_len, mode,
784 from_kuid(&init_user_ns, current_fsuid()),
785 from_kgid(&init_user_ns, current_fsgid()),
786 cfs_curproc_cap_pack(), rdev, &request);
787 ll_finish_md_op_data(op_data);
788 if (err)
789 goto err_exit;
790
791 ll_update_times(request, dir);
792
793 err = ll_prep_inode(&inode, request, dir->i_sb, NULL);
794 if (err)
795 goto err_exit;
796
797 d_instantiate(dentry, inode);
798 err_exit:
799 ptlrpc_req_finished(request);
800
801 return err;
802 }
803
ll_mknod(struct inode * dir,struct dentry * dchild,umode_t mode,dev_t rdev)804 static int ll_mknod(struct inode *dir, struct dentry *dchild,
805 umode_t mode, dev_t rdev)
806 {
807 int err;
808
809 CDEBUG(D_VFSTRACE, "VFS Op:name=%pd,dir=%lu/%u(%p) mode %o dev %x\n",
810 dchild, dir->i_ino, dir->i_generation, dir,
811 mode, old_encode_dev(rdev));
812
813 if (!IS_POSIXACL(dir) || !exp_connect_umask(ll_i2mdexp(dir)))
814 mode &= ~current_umask();
815
816 switch (mode & S_IFMT) {
817 case 0:
818 mode |= S_IFREG; /* for mode = 0 case, fallthrough */
819 case S_IFREG:
820 case S_IFCHR:
821 case S_IFBLK:
822 case S_IFIFO:
823 case S_IFSOCK:
824 err = ll_new_node(dir, dchild, NULL, mode,
825 old_encode_dev(rdev),
826 LUSTRE_OPC_MKNOD);
827 break;
828 case S_IFDIR:
829 err = -EPERM;
830 break;
831 default:
832 err = -EINVAL;
833 }
834
835 if (!err)
836 ll_stats_ops_tally(ll_i2sbi(dir), LPROC_LL_MKNOD, 1);
837
838 return err;
839 }
840
841 /*
842 * Plain create. Intent create is handled in atomic_open.
843 */
ll_create_nd(struct inode * dir,struct dentry * dentry,umode_t mode,bool want_excl)844 static int ll_create_nd(struct inode *dir, struct dentry *dentry,
845 umode_t mode, bool want_excl)
846 {
847 int rc;
848
849 CDEBUG(D_VFSTRACE, "VFS Op:name=%pd,dir=%lu/%u(%p),flags=%u, excl=%d\n",
850 dentry, dir->i_ino,
851 dir->i_generation, dir, mode, want_excl);
852
853 rc = ll_mknod(dir, dentry, mode, 0);
854
855 ll_stats_ops_tally(ll_i2sbi(dir), LPROC_LL_CREATE, 1);
856
857 CDEBUG(D_VFSTRACE, "VFS Op:name=%pd, unhashed %d\n",
858 dentry, d_unhashed(dentry));
859
860 return rc;
861 }
862
ll_get_child_fid(struct dentry * child,struct lu_fid * fid)863 static inline void ll_get_child_fid(struct dentry *child, struct lu_fid *fid)
864 {
865 if (d_really_is_positive(child))
866 *fid = *ll_inode2fid(d_inode(child));
867 }
868
869 /**
870 * Remove dir entry
871 **/
ll_rmdir_entry(struct inode * dir,char * name,int namelen)872 int ll_rmdir_entry(struct inode *dir, char *name, int namelen)
873 {
874 struct ptlrpc_request *request = NULL;
875 struct md_op_data *op_data;
876 int rc;
877
878 CDEBUG(D_VFSTRACE, "VFS Op:name=%.*s,dir=%lu/%u(%p)\n",
879 namelen, name, dir->i_ino, dir->i_generation, dir);
880
881 op_data = ll_prep_md_op_data(NULL, dir, NULL, name, strlen(name),
882 S_IFDIR, LUSTRE_OPC_ANY, NULL);
883 if (IS_ERR(op_data))
884 return PTR_ERR(op_data);
885 op_data->op_cli_flags |= CLI_RM_ENTRY;
886 rc = md_unlink(ll_i2sbi(dir)->ll_md_exp, op_data, &request);
887 ll_finish_md_op_data(op_data);
888 if (rc == 0) {
889 ll_update_times(request, dir);
890 ll_stats_ops_tally(ll_i2sbi(dir), LPROC_LL_RMDIR, 1);
891 }
892
893 ptlrpc_req_finished(request);
894 return rc;
895 }
896
ll_objects_destroy(struct ptlrpc_request * request,struct inode * dir)897 int ll_objects_destroy(struct ptlrpc_request *request, struct inode *dir)
898 {
899 struct mdt_body *body;
900 struct lov_mds_md *eadata;
901 struct lov_stripe_md *lsm = NULL;
902 struct obd_trans_info oti = { 0 };
903 struct obdo *oa;
904 struct obd_capa *oc = NULL;
905 int rc;
906
907 /* req is swabbed so this is safe */
908 body = req_capsule_server_get(&request->rq_pill, &RMF_MDT_BODY);
909 if (!(body->valid & OBD_MD_FLEASIZE))
910 return 0;
911
912 if (body->eadatasize == 0) {
913 CERROR("OBD_MD_FLEASIZE set but eadatasize zero\n");
914 rc = -EPROTO;
915 goto out;
916 }
917
918 /* The MDS sent back the EA because we unlinked the last reference
919 * to this file. Use this EA to unlink the objects on the OST.
920 * It's opaque so we don't swab here; we leave it to obd_unpackmd() to
921 * check it is complete and sensible. */
922 eadata = req_capsule_server_sized_get(&request->rq_pill, &RMF_MDT_MD,
923 body->eadatasize);
924 LASSERT(eadata != NULL);
925
926 rc = obd_unpackmd(ll_i2dtexp(dir), &lsm, eadata, body->eadatasize);
927 if (rc < 0) {
928 CERROR("obd_unpackmd: %d\n", rc);
929 goto out;
930 }
931 LASSERT(rc >= sizeof(*lsm));
932
933 OBDO_ALLOC(oa);
934 if (oa == NULL) {
935 rc = -ENOMEM;
936 goto out_free_memmd;
937 }
938
939 oa->o_oi = lsm->lsm_oi;
940 oa->o_mode = body->mode & S_IFMT;
941 oa->o_valid = OBD_MD_FLID | OBD_MD_FLTYPE | OBD_MD_FLGROUP;
942
943 if (body->valid & OBD_MD_FLCOOKIE) {
944 oa->o_valid |= OBD_MD_FLCOOKIE;
945 oti.oti_logcookies =
946 req_capsule_server_sized_get(&request->rq_pill,
947 &RMF_LOGCOOKIES,
948 sizeof(struct llog_cookie) *
949 lsm->lsm_stripe_count);
950 if (oti.oti_logcookies == NULL) {
951 oa->o_valid &= ~OBD_MD_FLCOOKIE;
952 body->valid &= ~OBD_MD_FLCOOKIE;
953 }
954 }
955
956 if (body->valid & OBD_MD_FLOSSCAPA) {
957 rc = md_unpack_capa(ll_i2mdexp(dir), request, &RMF_CAPA2, &oc);
958 if (rc)
959 goto out_free_memmd;
960 }
961
962 rc = obd_destroy(NULL, ll_i2dtexp(dir), oa, lsm, &oti,
963 ll_i2mdexp(dir), oc);
964 capa_put(oc);
965 if (rc)
966 CERROR("obd destroy objid "DOSTID" error %d\n",
967 POSTID(&lsm->lsm_oi), rc);
968 out_free_memmd:
969 obd_free_memmd(ll_i2dtexp(dir), &lsm);
970 OBDO_FREE(oa);
971 out:
972 return rc;
973 }
974
975 /* ll_unlink() doesn't update the inode with the new link count.
976 * Instead, ll_ddelete() and ll_d_iput() will update it based upon if there
977 * is any lock existing. They will recycle dentries and inodes based upon locks
978 * too. b=20433 */
ll_unlink(struct inode * dir,struct dentry * dentry)979 static int ll_unlink(struct inode *dir, struct dentry *dentry)
980 {
981 struct ptlrpc_request *request = NULL;
982 struct md_op_data *op_data;
983 int rc;
984
985 CDEBUG(D_VFSTRACE, "VFS Op:name=%pd,dir=%lu/%u(%p)\n",
986 dentry, dir->i_ino, dir->i_generation, dir);
987
988 op_data = ll_prep_md_op_data(NULL, dir, NULL,
989 dentry->d_name.name,
990 dentry->d_name.len,
991 0, LUSTRE_OPC_ANY, NULL);
992 if (IS_ERR(op_data))
993 return PTR_ERR(op_data);
994
995 ll_get_child_fid(dentry, &op_data->op_fid3);
996 op_data->op_fid2 = op_data->op_fid3;
997 rc = md_unlink(ll_i2sbi(dir)->ll_md_exp, op_data, &request);
998 ll_finish_md_op_data(op_data);
999 if (rc)
1000 goto out;
1001
1002 ll_update_times(request, dir);
1003 ll_stats_ops_tally(ll_i2sbi(dir), LPROC_LL_UNLINK, 1);
1004
1005 rc = ll_objects_destroy(request, dir);
1006 out:
1007 ptlrpc_req_finished(request);
1008 return rc;
1009 }
1010
ll_mkdir(struct inode * dir,struct dentry * dentry,ll_umode_t mode)1011 static int ll_mkdir(struct inode *dir, struct dentry *dentry, ll_umode_t mode)
1012 {
1013 int err;
1014
1015 CDEBUG(D_VFSTRACE, "VFS Op:name=%pd,dir=%lu/%u(%p)\n",
1016 dentry, dir->i_ino, dir->i_generation, dir);
1017
1018 if (!IS_POSIXACL(dir) || !exp_connect_umask(ll_i2mdexp(dir)))
1019 mode &= ~current_umask();
1020 mode = (mode & (S_IRWXUGO|S_ISVTX)) | S_IFDIR;
1021 err = ll_new_node(dir, dentry, NULL, mode, 0, LUSTRE_OPC_MKDIR);
1022
1023 if (!err)
1024 ll_stats_ops_tally(ll_i2sbi(dir), LPROC_LL_MKDIR, 1);
1025
1026 return err;
1027 }
1028
ll_rmdir(struct inode * dir,struct dentry * dentry)1029 static int ll_rmdir(struct inode *dir, struct dentry *dentry)
1030 {
1031 struct ptlrpc_request *request = NULL;
1032 struct md_op_data *op_data;
1033 int rc;
1034
1035 CDEBUG(D_VFSTRACE, "VFS Op:name=%pd,dir=%lu/%u(%p)\n",
1036 dentry, dir->i_ino, dir->i_generation, dir);
1037
1038 op_data = ll_prep_md_op_data(NULL, dir, NULL,
1039 dentry->d_name.name,
1040 dentry->d_name.len,
1041 S_IFDIR, LUSTRE_OPC_ANY, NULL);
1042 if (IS_ERR(op_data))
1043 return PTR_ERR(op_data);
1044
1045 ll_get_child_fid(dentry, &op_data->op_fid3);
1046 op_data->op_fid2 = op_data->op_fid3;
1047 rc = md_unlink(ll_i2sbi(dir)->ll_md_exp, op_data, &request);
1048 ll_finish_md_op_data(op_data);
1049 if (rc == 0) {
1050 ll_update_times(request, dir);
1051 ll_stats_ops_tally(ll_i2sbi(dir), LPROC_LL_RMDIR, 1);
1052 }
1053
1054 ptlrpc_req_finished(request);
1055 return rc;
1056 }
1057
ll_symlink(struct inode * dir,struct dentry * dentry,const char * oldname)1058 static int ll_symlink(struct inode *dir, struct dentry *dentry,
1059 const char *oldname)
1060 {
1061 int err;
1062
1063 CDEBUG(D_VFSTRACE, "VFS Op:name=%pd,dir=%lu/%u(%p),target=%.*s\n",
1064 dentry, dir->i_ino, dir->i_generation,
1065 dir, 3000, oldname);
1066
1067 err = ll_new_node(dir, dentry, oldname, S_IFLNK | S_IRWXUGO,
1068 0, LUSTRE_OPC_SYMLINK);
1069
1070 if (!err)
1071 ll_stats_ops_tally(ll_i2sbi(dir), LPROC_LL_SYMLINK, 1);
1072
1073 return err;
1074 }
1075
ll_link(struct dentry * old_dentry,struct inode * dir,struct dentry * new_dentry)1076 static int ll_link(struct dentry *old_dentry, struct inode *dir,
1077 struct dentry *new_dentry)
1078 {
1079 struct inode *src = d_inode(old_dentry);
1080 struct ll_sb_info *sbi = ll_i2sbi(dir);
1081 struct ptlrpc_request *request = NULL;
1082 struct md_op_data *op_data;
1083 int err;
1084
1085 CDEBUG(D_VFSTRACE,
1086 "VFS Op: inode=%lu/%u(%p), dir=%lu/%u(%p), target=%pd\n",
1087 src->i_ino, src->i_generation, src, dir->i_ino,
1088 dir->i_generation, dir, new_dentry);
1089
1090 op_data = ll_prep_md_op_data(NULL, src, dir, new_dentry->d_name.name,
1091 new_dentry->d_name.len,
1092 0, LUSTRE_OPC_ANY, NULL);
1093 if (IS_ERR(op_data))
1094 return PTR_ERR(op_data);
1095
1096 err = md_link(sbi->ll_md_exp, op_data, &request);
1097 ll_finish_md_op_data(op_data);
1098 if (err)
1099 goto out;
1100
1101 ll_update_times(request, dir);
1102 ll_stats_ops_tally(sbi, LPROC_LL_LINK, 1);
1103 out:
1104 ptlrpc_req_finished(request);
1105 return err;
1106 }
1107
ll_rename(struct inode * old_dir,struct dentry * old_dentry,struct inode * new_dir,struct dentry * new_dentry)1108 static int ll_rename(struct inode *old_dir, struct dentry *old_dentry,
1109 struct inode *new_dir, struct dentry *new_dentry)
1110 {
1111 struct ptlrpc_request *request = NULL;
1112 struct ll_sb_info *sbi = ll_i2sbi(old_dir);
1113 struct md_op_data *op_data;
1114 int err;
1115
1116 CDEBUG(D_VFSTRACE,
1117 "VFS Op:oldname=%pd,src_dir=%lu/%u(%p),newname=%pd,tgt_dir=%lu/%u(%p)\n",
1118 old_dentry, old_dir->i_ino, old_dir->i_generation, old_dir,
1119 new_dentry, new_dir->i_ino, new_dir->i_generation, new_dir);
1120
1121 op_data = ll_prep_md_op_data(NULL, old_dir, new_dir, NULL, 0, 0,
1122 LUSTRE_OPC_ANY, NULL);
1123 if (IS_ERR(op_data))
1124 return PTR_ERR(op_data);
1125
1126 ll_get_child_fid(old_dentry, &op_data->op_fid3);
1127 ll_get_child_fid(new_dentry, &op_data->op_fid4);
1128 err = md_rename(sbi->ll_md_exp, op_data,
1129 old_dentry->d_name.name,
1130 old_dentry->d_name.len,
1131 new_dentry->d_name.name,
1132 new_dentry->d_name.len, &request);
1133 ll_finish_md_op_data(op_data);
1134 if (!err) {
1135 ll_update_times(request, old_dir);
1136 ll_update_times(request, new_dir);
1137 ll_stats_ops_tally(sbi, LPROC_LL_RENAME, 1);
1138 err = ll_objects_destroy(request, old_dir);
1139 }
1140
1141 ptlrpc_req_finished(request);
1142 if (!err)
1143 d_move(old_dentry, new_dentry);
1144 return err;
1145 }
1146
1147 const struct inode_operations ll_dir_inode_operations = {
1148 .mknod = ll_mknod,
1149 .atomic_open = ll_atomic_open,
1150 .lookup = ll_lookup_nd,
1151 .create = ll_create_nd,
1152 /* We need all these non-raw things for NFSD, to not patch it. */
1153 .unlink = ll_unlink,
1154 .mkdir = ll_mkdir,
1155 .rmdir = ll_rmdir,
1156 .symlink = ll_symlink,
1157 .link = ll_link,
1158 .rename = ll_rename,
1159 .setattr = ll_setattr,
1160 .getattr = ll_getattr,
1161 .permission = ll_inode_permission,
1162 .setxattr = ll_setxattr,
1163 .getxattr = ll_getxattr,
1164 .listxattr = ll_listxattr,
1165 .removexattr = ll_removexattr,
1166 .get_acl = ll_get_acl,
1167 };
1168
1169 const struct inode_operations ll_special_inode_operations = {
1170 .setattr = ll_setattr,
1171 .getattr = ll_getattr,
1172 .permission = ll_inode_permission,
1173 .setxattr = ll_setxattr,
1174 .getxattr = ll_getxattr,
1175 .listxattr = ll_listxattr,
1176 .removexattr = ll_removexattr,
1177 .get_acl = ll_get_acl,
1178 };
1179