1 // SPDX-License-Identifier: GPL-2.0-or-later 1
2 /*
3 * Copyright (C) International Business Mach
4 * Portions Copyright (C) Christoph Hellwig,
5 */
6
7 #include <linux/fs.h>
8 #include <linux/namei.h>
9 #include <linux/ctype.h>
10 #include <linux/quotaops.h>
11 #include <linux/exportfs.h>
12 #include "jfs_incore.h"
13 #include "jfs_superblock.h"
14 #include "jfs_inode.h"
15 #include "jfs_dinode.h"
16 #include "jfs_dmap.h"
17 #include "jfs_unicode.h"
18 #include "jfs_metapage.h"
19 #include "jfs_xattr.h"
20 #include "jfs_acl.h"
21 #include "jfs_debug.h"
22
23 /*
24 * forward references
25 */
26 const struct dentry_operations jfs_ci_dentry_o
27
28 static s64 commitZeroLink(tid_t, struct inode
29
30 /*
31 * NAME: free_ea_wmap(inode)
32 *
33 * FUNCTION: free uncommitted extended attr
34 *
35 */
36 static inline void free_ea_wmap(struct inode *
37 {
38 dxd_t *ea = &JFS_IP(inode)->ea;
39
40 if (ea->flag & DXD_EXTENT) {
41 /* free EA pages from cache */
42 invalidate_dxd_metapages(inode
43 dbFree(inode, addressDXD(ea),
44 }
45 ea->flag = 0;
46 }
47
48 /*
49 * NAME: jfs_create(dip, dentry, mode)
50 *
51 * FUNCTION: create a regular file in the p
52 * with name = <from dentry> and
53 *
54 * PARAMETER: dip - parent directory vno
55 * dentry - dentry of new file
56 * mode - create mode (rwxrwxr
57 * nd- nd struct
58 *
59 * RETURN: Errors from subroutines
60 *
61 */
62 static int jfs_create(struct mnt_idmap *idmap,
63 struct dentry *dentry, u
64 {
65 int rc = 0;
66 tid_t tid; /* transaction
67 struct inode *ip = NULL; /* chi
68 ino_t ino;
69 struct component_name dname; /* chi
70 struct btstack btstack;
71 struct inode *iplist[2];
72 struct tblock *tblk;
73
74 jfs_info("jfs_create: dip:0x%p name:%p
75
76 rc = dquot_initialize(dip);
77 if (rc)
78 goto out1;
79
80 /*
81 * search parent directory for entry/f
82 * (dtSearch() returns parent director
83 */
84 if ((rc = get_UCSname(&dname, dentry))
85 goto out1;
86
87 /*
88 * Either iAlloc() or txBegin() may bl
89 * block there while holding dtree pag
90 * begin the transaction before we sea
91 */
92 ip = ialloc(dip, mode);
93 if (IS_ERR(ip)) {
94 rc = PTR_ERR(ip);
95 goto out2;
96 }
97
98 tid = txBegin(dip->i_sb, 0);
99
100 mutex_lock_nested(&JFS_IP(dip)->commit
101 mutex_lock_nested(&JFS_IP(ip)->commit_
102
103 rc = jfs_init_acl(tid, ip, dip);
104 if (rc)
105 goto out3;
106
107 rc = jfs_init_security(tid, ip, dip, &
108 if (rc) {
109 txAbort(tid, 0);
110 goto out3;
111 }
112
113 if ((rc = dtSearch(dip, &dname, &ino,
114 jfs_err("jfs_create: dtSearch
115 txAbort(tid, 0);
116 goto out3;
117 }
118
119 tblk = tid_to_tblock(tid);
120 tblk->xflag |= COMMIT_CREATE;
121 tblk->ino = ip->i_ino;
122 tblk->u.ixpxd = JFS_IP(ip)->ixpxd;
123
124 iplist[0] = dip;
125 iplist[1] = ip;
126
127 /*
128 * initialize the child XAD tree root
129 */
130 xtInitRoot(tid, ip);
131
132 /*
133 * create entry in parent directory fo
134 * (dtInsert() releases parent directo
135 */
136 ino = ip->i_ino;
137 if ((rc = dtInsert(tid, dip, &dname, &
138 if (rc == -EIO) {
139 jfs_err("jfs_create: d
140 txAbort(tid, 1);
141 } else
142 txAbort(tid, 0);
143 goto out3;
144 }
145
146 ip->i_op = &jfs_file_inode_operations;
147 ip->i_fop = &jfs_file_operations;
148 ip->i_mapping->a_ops = &jfs_aops;
149
150 mark_inode_dirty(ip);
151
152 inode_set_mtime_to_ts(dip, inode_set_c
153
154 mark_inode_dirty(dip);
155
156 rc = txCommit(tid, 2, &iplist[0], 0);
157
158 out3:
159 txEnd(tid);
160 mutex_unlock(&JFS_IP(ip)->commit_mutex
161 mutex_unlock(&JFS_IP(dip)->commit_mute
162 if (rc) {
163 free_ea_wmap(ip);
164 clear_nlink(ip);
165 discard_new_inode(ip);
166 } else {
167 d_instantiate_new(dentry, ip);
168 }
169
170 out2:
171 free_UCSname(&dname);
172
173 out1:
174
175 jfs_info("jfs_create: rc:%d", rc);
176 return rc;
177 }
178
179
180 /*
181 * NAME: jfs_mkdir(dip, dentry, mode)
182 *
183 * FUNCTION: create a child directory in th
184 * with name = <from dentry> and
185 *
186 * PARAMETER: dip - parent directory vno
187 * dentry - dentry of child dire
188 * mode - create mode (rwxrwxr
189 *
190 * RETURN: Errors from subroutines
191 *
192 * note:
193 * EACCES: user needs search+write permission
194 */
195 static int jfs_mkdir(struct mnt_idmap *idmap,
196 struct dentry *dentry, um
197 {
198 int rc = 0;
199 tid_t tid; /* transaction
200 struct inode *ip = NULL; /* chi
201 ino_t ino;
202 struct component_name dname; /* chi
203 struct btstack btstack;
204 struct inode *iplist[2];
205 struct tblock *tblk;
206
207 jfs_info("jfs_mkdir: dip:0x%p name:%pd
208
209 rc = dquot_initialize(dip);
210 if (rc)
211 goto out1;
212
213 /*
214 * search parent directory for entry/f
215 * (dtSearch() returns parent director
216 */
217 if ((rc = get_UCSname(&dname, dentry))
218 goto out1;
219
220 /*
221 * Either iAlloc() or txBegin() may bl
222 * block there while holding dtree pag
223 * begin the transaction before we sea
224 */
225 ip = ialloc(dip, S_IFDIR | mode);
226 if (IS_ERR(ip)) {
227 rc = PTR_ERR(ip);
228 goto out2;
229 }
230
231 tid = txBegin(dip->i_sb, 0);
232
233 mutex_lock_nested(&JFS_IP(dip)->commit
234 mutex_lock_nested(&JFS_IP(ip)->commit_
235
236 rc = jfs_init_acl(tid, ip, dip);
237 if (rc)
238 goto out3;
239
240 rc = jfs_init_security(tid, ip, dip, &
241 if (rc) {
242 txAbort(tid, 0);
243 goto out3;
244 }
245
246 if ((rc = dtSearch(dip, &dname, &ino,
247 jfs_err("jfs_mkdir: dtSearch r
248 txAbort(tid, 0);
249 goto out3;
250 }
251
252 tblk = tid_to_tblock(tid);
253 tblk->xflag |= COMMIT_CREATE;
254 tblk->ino = ip->i_ino;
255 tblk->u.ixpxd = JFS_IP(ip)->ixpxd;
256
257 iplist[0] = dip;
258 iplist[1] = ip;
259
260 /*
261 * initialize the child directory in-l
262 */
263 dtInitRoot(tid, ip, dip->i_ino);
264
265 /*
266 * create entry in parent directory fo
267 * (dtInsert() releases parent directo
268 */
269 ino = ip->i_ino;
270 if ((rc = dtInsert(tid, dip, &dname, &
271 if (rc == -EIO) {
272 jfs_err("jfs_mkdir: dt
273 txAbort(tid, 1);
274 } else
275 txAbort(tid, 0);
276 goto out3;
277 }
278
279 set_nlink(ip, 2); /* for '.' */
280 ip->i_op = &jfs_dir_inode_operations;
281 ip->i_fop = &jfs_dir_operations;
282
283 mark_inode_dirty(ip);
284
285 /* update parent directory inode */
286 inc_nlink(dip); /* for '..' fr
287 inode_set_mtime_to_ts(dip, inode_set_c
288 mark_inode_dirty(dip);
289
290 rc = txCommit(tid, 2, &iplist[0], 0);
291
292 out3:
293 txEnd(tid);
294 mutex_unlock(&JFS_IP(ip)->commit_mutex
295 mutex_unlock(&JFS_IP(dip)->commit_mute
296 if (rc) {
297 free_ea_wmap(ip);
298 clear_nlink(ip);
299 discard_new_inode(ip);
300 } else {
301 d_instantiate_new(dentry, ip);
302 }
303
304 out2:
305 free_UCSname(&dname);
306
307
308 out1:
309
310 jfs_info("jfs_mkdir: rc:%d", rc);
311 return rc;
312 }
313
314 /*
315 * NAME: jfs_rmdir(dip, dentry)
316 *
317 * FUNCTION: remove a link to child directo
318 *
319 * PARAMETER: dip - parent inode
320 * dentry - child directory dent
321 *
322 * RETURN: -EINVAL - if name is . or ..
323 * -EINVAL - if . or .. exist but
324 * errors from subroutines
325 *
326 * note:
327 * if other threads have the directory open wh
328 * is removed, the "." and ".." entries, if pr
329 * rmdir() returns and no new entries may be c
330 * but the directory is not removed until the
331 * the directory is released (cf.unlink() of r
332 */
333 static int jfs_rmdir(struct inode *dip, struct
334 {
335 int rc;
336 tid_t tid; /* transaction
337 struct inode *ip = d_inode(dentry);
338 ino_t ino;
339 struct component_name dname;
340 struct inode *iplist[2];
341 struct tblock *tblk;
342
343 jfs_info("jfs_rmdir: dip:0x%p name:%pd
344
345 /* Init inode for quota operations. */
346 rc = dquot_initialize(dip);
347 if (rc)
348 goto out;
349 rc = dquot_initialize(ip);
350 if (rc)
351 goto out;
352
353 /* directory must be empty to be remov
354 if (!dtEmpty(ip)) {
355 rc = -ENOTEMPTY;
356 goto out;
357 }
358
359 if ((rc = get_UCSname(&dname, dentry))
360 goto out;
361 }
362
363 tid = txBegin(dip->i_sb, 0);
364
365 mutex_lock_nested(&JFS_IP(dip)->commit
366 mutex_lock_nested(&JFS_IP(ip)->commit_
367
368 iplist[0] = dip;
369 iplist[1] = ip;
370
371 tblk = tid_to_tblock(tid);
372 tblk->xflag |= COMMIT_DELETE;
373 tblk->u.ip = ip;
374
375 /*
376 * delete the entry of target director
377 */
378 ino = ip->i_ino;
379 if ((rc = dtDelete(tid, dip, &dname, &
380 jfs_err("jfs_rmdir: dtDelete r
381 if (rc == -EIO)
382 txAbort(tid, 1);
383 txEnd(tid);
384 mutex_unlock(&JFS_IP(ip)->comm
385 mutex_unlock(&JFS_IP(dip)->com
386
387 goto out2;
388 }
389
390 /* update parent directory's link coun
391 * to ".." entry of the target directo
392 */
393 inode_set_mtime_to_ts(dip, inode_set_c
394 inode_dec_link_count(dip);
395
396 /*
397 * OS/2 could have created EA and/or A
398 */
399 /* free EA from both persistent and wo
400 if (JFS_IP(ip)->ea.flag & DXD_EXTENT)
401 /* free EA pages */
402 txEA(tid, ip, &JFS_IP(ip)->ea,
403 }
404 JFS_IP(ip)->ea.flag = 0;
405
406 /* free ACL from both persistent and w
407 if (JFS_IP(ip)->acl.flag & DXD_EXTENT)
408 /* free ACL pages */
409 txEA(tid, ip, &JFS_IP(ip)->acl
410 }
411 JFS_IP(ip)->acl.flag = 0;
412
413 /* mark the target directory as delete
414 clear_nlink(ip);
415 mark_inode_dirty(ip);
416
417 rc = txCommit(tid, 2, &iplist[0], 0);
418
419 txEnd(tid);
420
421 mutex_unlock(&JFS_IP(ip)->commit_mutex
422 mutex_unlock(&JFS_IP(dip)->commit_mute
423
424 /*
425 * Truncating the directory index tabl
426 * may need to be done iteratively
427 */
428 if (test_cflag(COMMIT_Stale, dip)) {
429 if (dip->i_size > 1)
430 jfs_truncate_nolock(di
431
432 clear_cflag(COMMIT_Stale, dip)
433 }
434
435 out2:
436 free_UCSname(&dname);
437
438 out:
439 jfs_info("jfs_rmdir: rc:%d", rc);
440 return rc;
441 }
442
443 /*
444 * NAME: jfs_unlink(dip, dentry)
445 *
446 * FUNCTION: remove a link to object <vp> n
447 * from parent directory <dvp>
448 *
449 * PARAMETER: dip - inode of parent dire
450 * dentry - dentry of object to
451 *
452 * RETURN: errors from subroutines
453 *
454 * note:
455 * temporary file: if one or more processes ha
456 * when the last link is removed, the link wil
457 * unlink() returns, but the removal of the fi
458 * postponed until all references to the files
459 *
460 * JFS does NOT support unlink() on directorie
461 *
462 */
463 static int jfs_unlink(struct inode *dip, struc
464 {
465 int rc;
466 tid_t tid; /* transaction
467 struct inode *ip = d_inode(dentry);
468 ino_t ino;
469 struct component_name dname; /* obj
470 struct inode *iplist[2];
471 struct tblock *tblk;
472 s64 new_size = 0;
473 int commit_flag;
474
475 jfs_info("jfs_unlink: dip:0x%p name:%p
476
477 /* Init inode for quota operations. */
478 rc = dquot_initialize(dip);
479 if (rc)
480 goto out;
481 rc = dquot_initialize(ip);
482 if (rc)
483 goto out;
484
485 if ((rc = get_UCSname(&dname, dentry))
486 goto out;
487
488 IWRITE_LOCK(ip, RDWRLOCK_NORMAL);
489
490 tid = txBegin(dip->i_sb, 0);
491
492 mutex_lock_nested(&JFS_IP(dip)->commit
493 mutex_lock_nested(&JFS_IP(ip)->commit_
494
495 iplist[0] = dip;
496 iplist[1] = ip;
497
498 /*
499 * delete the entry of target file fro
500 */
501 ino = ip->i_ino;
502 if ((rc = dtDelete(tid, dip, &dname, &
503 jfs_err("jfs_unlink: dtDelete
504 if (rc == -EIO)
505 txAbort(tid, 1);
506 txEnd(tid);
507 mutex_unlock(&JFS_IP(ip)->comm
508 mutex_unlock(&JFS_IP(dip)->com
509 IWRITE_UNLOCK(ip);
510 goto out1;
511 }
512
513 ASSERT(ip->i_nlink);
514
515 inode_set_mtime_to_ts(dip,
516 inode_set_ctime_
517 mark_inode_dirty(dip);
518
519 /* update target's inode */
520 inode_dec_link_count(ip);
521
522 /*
523 * commit zero link count object
524 */
525 if (ip->i_nlink == 0) {
526 assert(!test_cflag(COMMIT_Noli
527 /* free block resources */
528 if ((new_size = commitZeroLink
529 txAbort(tid, 1);
530 txEnd(tid);
531 mutex_unlock(&JFS_IP(i
532 mutex_unlock(&JFS_IP(d
533 IWRITE_UNLOCK(ip);
534 rc = new_size;
535 goto out1;
536 }
537 tblk = tid_to_tblock(tid);
538 tblk->xflag |= COMMIT_DELETE;
539 tblk->u.ip = ip;
540 }
541
542 /*
543 * Incomplete truncate of file data ca
544 * result in timing problems unless we
545 * transaction.
546 */
547 if (new_size)
548 commit_flag = COMMIT_SYNC;
549 else
550 commit_flag = 0;
551
552 /*
553 * If xtTruncate was incomplete, commi
554 * timing complications
555 */
556 rc = txCommit(tid, 2, &iplist[0], comm
557
558 txEnd(tid);
559
560 mutex_unlock(&JFS_IP(ip)->commit_mutex
561 mutex_unlock(&JFS_IP(dip)->commit_mute
562
563 while (new_size && (rc == 0)) {
564 tid = txBegin(dip->i_sb, 0);
565 mutex_lock(&JFS_IP(ip)->commit
566 new_size = xtTruncate_pmap(tid
567 if (new_size < 0) {
568 txAbort(tid, 1);
569 rc = new_size;
570 } else
571 rc = txCommit(tid, 2,
572 txEnd(tid);
573 mutex_unlock(&JFS_IP(ip)->comm
574 }
575
576 if (ip->i_nlink == 0)
577 set_cflag(COMMIT_Nolink, ip);
578
579 IWRITE_UNLOCK(ip);
580
581 /*
582 * Truncating the directory index tabl
583 * may need to be done iteratively
584 */
585 if (test_cflag(COMMIT_Stale, dip)) {
586 if (dip->i_size > 1)
587 jfs_truncate_nolock(di
588
589 clear_cflag(COMMIT_Stale, dip)
590 }
591
592 out1:
593 free_UCSname(&dname);
594 out:
595 jfs_info("jfs_unlink: rc:%d", rc);
596 return rc;
597 }
598
599 /*
600 * NAME: commitZeroLink()
601 *
602 * FUNCTION: for non-directory, called by j
603 * truncate a regular file, direc
604 * link to zero length. return 0
605 * one of these.
606 *
607 * if the file is currently assoc
608 * only permanent disk and inode
609 * and neither the inode nor indi
610 * so that the resources can be l
611 * map by ctrunc1.
612 * if there is no VM segment on e
613 * freed in both work and permane
614 * (? for temporary file - memory
615 * after no reference:
616 * reference count > 0 - )
617 *
618 * PARAMETERS: cd - pointer to commit da
619 * current inode is the
620 *
621 * RETURN: Errors from subroutines
622 */
623 static s64 commitZeroLink(tid_t tid, struct in
624 {
625 int filetype;
626 struct tblock *tblk;
627
628 jfs_info("commitZeroLink: tid = %d, ip
629
630 filetype = ip->i_mode & S_IFMT;
631 switch (filetype) {
632 case S_IFREG:
633 break;
634 case S_IFLNK:
635 /* fast symbolic link */
636 if (ip->i_size < IDATASIZE) {
637 ip->i_size = 0;
638 return 0;
639 }
640 break;
641 default:
642 assert(filetype != S_IFDIR);
643 return 0;
644 }
645
646 set_cflag(COMMIT_Freewmap, ip);
647
648 /* mark transaction of block map updat
649 tblk = tid_to_tblock(tid);
650 tblk->xflag |= COMMIT_PMAP;
651
652 /*
653 * free EA
654 */
655 if (JFS_IP(ip)->ea.flag & DXD_EXTENT)
656 /* acquire maplock on EA to be
657 txEA(tid, ip, &JFS_IP(ip)->ea,
658
659 /*
660 * free ACL
661 */
662 if (JFS_IP(ip)->acl.flag & DXD_EXTENT)
663 /* acquire maplock on EA to be
664 txEA(tid, ip, &JFS_IP(ip)->acl
665
666 /*
667 * free xtree/data (truncate to zero l
668 * free xtree/data pages from cache if
669 * free xtree/data blocks from persist
670 * free xtree/data blocks from working
671 */
672 if (ip->i_size)
673 return xtTruncate_pmap(tid, ip
674
675 return 0;
676 }
677
678
679 /*
680 * NAME: jfs_free_zero_link()
681 *
682 * FUNCTION: for non-directory, called by i
683 * free resources of a file from
684 * for a file previously committe
685 * while associated with a pager
686 *
687 * PARAMETER: ip - pointer to inode of
688 */
689 void jfs_free_zero_link(struct inode *ip)
690 {
691 int type;
692
693 jfs_info("jfs_free_zero_link: ip = 0x%
694
695 /* return if not reg or symbolic link
696 * already ok.
697 */
698 type = ip->i_mode & S_IFMT;
699
700 switch (type) {
701 case S_IFREG:
702 break;
703 case S_IFLNK:
704 /* if its contained in inode n
705 if (ip->i_size < IDATASIZE)
706 return;
707 break;
708 default:
709 return;
710 }
711
712 /*
713 * free EA
714 */
715 if (JFS_IP(ip)->ea.flag & DXD_EXTENT)
716 s64 xaddr = addressDXD(&JFS_IP
717 int xlen = lengthDXD(&JFS_IP(i
718 struct maplock maplock; /* map
719 struct pxd_lock *pxdlock;
720
721 /* free EA pages from cache */
722 invalidate_dxd_metapages(ip, J
723
724 /* free EA extent from working
725 maplock.index = 1;
726 pxdlock = (struct pxd_lock *)
727 pxdlock->flag = mlckFREEPXD;
728 PXDaddress(&pxdlock->pxd, xadd
729 PXDlength(&pxdlock->pxd, xlen)
730 txFreeMap(ip, pxdlock, NULL, C
731 }
732
733 /*
734 * free ACL
735 */
736 if (JFS_IP(ip)->acl.flag & DXD_EXTENT)
737 s64 xaddr = addressDXD(&JFS_IP
738 int xlen = lengthDXD(&JFS_IP(i
739 struct maplock maplock; /* map
740 struct pxd_lock *pxdlock;
741
742 invalidate_dxd_metapages(ip, J
743
744 /* free ACL extent from workin
745 maplock.index = 1;
746 pxdlock = (struct pxd_lock *)
747 pxdlock->flag = mlckFREEPXD;
748 PXDaddress(&pxdlock->pxd, xadd
749 PXDlength(&pxdlock->pxd, xlen)
750 txFreeMap(ip, pxdlock, NULL, C
751 }
752
753 /*
754 * free xtree/data (truncate to zero l
755 * free xtree/data pages from cache, a
756 * free xtree/data blocks from working
757 */
758 if (ip->i_size)
759 xtTruncate(0, ip, 0, COMMIT_WM
760 }
761
762 /*
763 * NAME: jfs_link(vp, dvp, name, crp)
764 *
765 * FUNCTION: create a link to <vp> by the n
766 * in the parent directory <dvp>
767 *
768 * PARAMETER: vp - target object
769 * dvp - parent directory of
770 * name - name of new link to
771 * crp - credential
772 *
773 * RETURN: Errors from subroutines
774 *
775 * note:
776 * JFS does NOT support link() on directories
777 * path in the directory hierarchy);
778 * EPERM: the target object is a directory, an
779 * does not have appropriate privileges or the
780 * using link() on directories [XPG4.2].
781 *
782 * JFS does NOT support links between file sys
783 * EXDEV: target object and new link are on di
784 * implementation does not support links betwe
785 */
786 static int jfs_link(struct dentry *old_dentry,
787 struct inode *dir, struct dentry
788 {
789 int rc;
790 tid_t tid;
791 struct inode *ip = d_inode(old_dentry)
792 ino_t ino;
793 struct component_name dname;
794 struct btstack btstack;
795 struct inode *iplist[2];
796
797 jfs_info("jfs_link: %pd %pd", old_dent
798
799 rc = dquot_initialize(dir);
800 if (rc)
801 goto out;
802
803 if (isReadOnly(ip)) {
804 jfs_error(ip->i_sb, "read-only
805 return -EROFS;
806 }
807
808 tid = txBegin(ip->i_sb, 0);
809
810 mutex_lock_nested(&JFS_IP(dir)->commit
811 mutex_lock_nested(&JFS_IP(ip)->commit_
812
813 /*
814 * scan parent directory for entry/fre
815 */
816 if ((rc = get_UCSname(&dname, dentry))
817 goto out_tx;
818
819 if ((rc = dtSearch(dir, &dname, &ino,
820 goto free_dname;
821
822 /*
823 * create entry for new link in parent
824 */
825 ino = ip->i_ino;
826 if ((rc = dtInsert(tid, dir, &dname, &
827 goto free_dname;
828
829 /* update object inode */
830 inc_nlink(ip); /* for new lin
831 inode_set_ctime_current(ip);
832 inode_set_mtime_to_ts(dir, inode_set_c
833 mark_inode_dirty(dir);
834 ihold(ip);
835
836 iplist[0] = ip;
837 iplist[1] = dir;
838 rc = txCommit(tid, 2, &iplist[0], 0);
839
840 if (rc) {
841 drop_nlink(ip); /* never insta
842 iput(ip);
843 } else
844 d_instantiate(dentry, ip);
845
846 free_dname:
847 free_UCSname(&dname);
848
849 out_tx:
850 txEnd(tid);
851
852 mutex_unlock(&JFS_IP(ip)->commit_mutex
853 mutex_unlock(&JFS_IP(dir)->commit_mute
854
855 out:
856 jfs_info("jfs_link: rc:%d", rc);
857 return rc;
858 }
859
860 /*
861 * NAME: jfs_symlink(dip, dentry, name)
862 *
863 * FUNCTION: creates a symbolic link to <sy
864 * in directory <dip>
865 *
866 * PARAMETER: dip - parent directory vno
867 * dentry - dentry of symbolic l
868 * name - the path name of the
869 * that will be the sou
870 *
871 * RETURN: errors from subroutines
872 *
873 * note:
874 * ENAMETOOLONG: pathname resolution of a symb
875 * an intermediate result whose length exceeds
876 */
877
878 static int jfs_symlink(struct mnt_idmap *idmap
879 struct dentry *dentry,
880 {
881 int rc;
882 tid_t tid;
883 ino_t ino = 0;
884 struct component_name dname;
885 u32 ssize; /* source path
886 struct btstack btstack;
887 struct inode *ip;
888 s64 xlen = 0;
889 int bmask = 0, xsize;
890 s64 xaddr;
891 struct metapage *mp;
892 struct super_block *sb;
893 struct tblock *tblk;
894
895 struct inode *iplist[2];
896
897 jfs_info("jfs_symlink: dip:0x%p name:%
898
899 rc = dquot_initialize(dip);
900 if (rc)
901 goto out1;
902
903 ssize = strlen(name) + 1;
904
905 /*
906 * search parent directory for entry/f
907 * (dtSearch() returns parent director
908 */
909
910 if ((rc = get_UCSname(&dname, dentry))
911 goto out1;
912
913 /*
914 * allocate on-disk/in-memory inode fo
915 * (iAlloc() returns new, locked inode
916 */
917 ip = ialloc(dip, S_IFLNK | 0777);
918 if (IS_ERR(ip)) {
919 rc = PTR_ERR(ip);
920 goto out2;
921 }
922
923 tid = txBegin(dip->i_sb, 0);
924
925 mutex_lock_nested(&JFS_IP(dip)->commit
926 mutex_lock_nested(&JFS_IP(ip)->commit_
927
928 rc = jfs_init_security(tid, ip, dip, &
929 if (rc)
930 goto out3;
931
932 tblk = tid_to_tblock(tid);
933 tblk->xflag |= COMMIT_CREATE;
934 tblk->ino = ip->i_ino;
935 tblk->u.ixpxd = JFS_IP(ip)->ixpxd;
936
937 /* fix symlink access permission
938 * (dir_create() ANDs in the u.u_cmask
939 * but symlinks really need to be 777
940 */
941 ip->i_mode |= 0777;
942
943 /*
944 * write symbolic link target path nam
945 */
946 xtInitRoot(tid, ip);
947
948 /*
949 * write source path name inline in on
950 */
951
952 if (ssize <= IDATASIZE) {
953 ip->i_op = &jfs_fast_symlink_i
954
955 ip->i_link = JFS_IP(ip)->i_inl
956 memcpy(ip->i_link, name, ssize
957 ip->i_size = ssize - 1;
958
959 /*
960 * if symlink is > 128 bytes,
961 * store inline extended attri
962 */
963 if (ssize > sizeof (JFS_IP(ip)
964 JFS_IP(ip)->mode2 &= ~
965
966 jfs_info("jfs_symlink: fast sy
967 ssize, name);
968 }
969 /*
970 * write source path name in a single
971 */
972 else {
973 jfs_info("jfs_symlink: allocat
974
975 ip->i_op = &jfs_symlink_inode_
976 inode_nohighmem(ip);
977 ip->i_mapping->a_ops = &jfs_ao
978
979 /*
980 * even though the data of sym
981 * path name) is treated as no
982 * it is read/written thru buf
983 */
984 sb = ip->i_sb;
985 bmask = JFS_SBI(sb)->bsize - 1
986 xsize = (ssize + bmask) & ~bma
987 xaddr = 0;
988 xlen = xsize >> JFS_SBI(sb)->l
989 if ((rc = xtInsert(tid, ip, 0,
990 txAbort(tid, 0);
991 goto out3;
992 }
993 ip->i_size = ssize - 1;
994 while (ssize) {
995 /* This is kind of sil
996 u32 copy_size = min_t(
997
998 mp = get_metapage(ip,
999
1000 if (mp == NULL) {
1001 xtTruncate(ti
1002 rc = -EIO;
1003 txAbort(tid,
1004 goto out3;
1005 }
1006 memcpy(mp->data, name
1007 flush_metapage(mp);
1008 ssize -= copy_size;
1009 name += copy_size;
1010 xaddr += JFS_SBI(sb)-
1011 }
1012 }
1013
1014 /*
1015 * create entry for symbolic link in
1016 */
1017 rc = dtSearch(dip, &dname, &ino, &bts
1018 if (rc == 0) {
1019 ino = ip->i_ino;
1020 rc = dtInsert(tid, dip, &dnam
1021 }
1022 if (rc) {
1023 if (xlen)
1024 xtTruncate(tid, ip, 0
1025 txAbort(tid, 0);
1026 /* discard new inode */
1027 goto out3;
1028 }
1029
1030 mark_inode_dirty(ip);
1031
1032 inode_set_mtime_to_ts(dip, inode_set_
1033 mark_inode_dirty(dip);
1034 /*
1035 * commit update of parent directory
1036 */
1037
1038 iplist[0] = dip;
1039 iplist[1] = ip;
1040 rc = txCommit(tid, 2, &iplist[0], 0);
1041
1042 out3:
1043 txEnd(tid);
1044 mutex_unlock(&JFS_IP(ip)->commit_mute
1045 mutex_unlock(&JFS_IP(dip)->commit_mut
1046 if (rc) {
1047 free_ea_wmap(ip);
1048 clear_nlink(ip);
1049 discard_new_inode(ip);
1050 } else {
1051 d_instantiate_new(dentry, ip)
1052 }
1053
1054 out2:
1055 free_UCSname(&dname);
1056
1057 out1:
1058 jfs_info("jfs_symlink: rc:%d", rc);
1059 return rc;
1060 }
1061
1062
1063 /*
1064 * NAME: jfs_rename
1065 *
1066 * FUNCTION: rename a file or directory
1067 */
1068 static int jfs_rename(struct mnt_idmap *idmap
1069 struct dentry *old_dent
1070 struct dentry *new_dent
1071 {
1072 struct btstack btstack;
1073 ino_t ino;
1074 struct component_name new_dname;
1075 struct inode *new_ip;
1076 struct component_name old_dname;
1077 struct inode *old_ip;
1078 int rc;
1079 tid_t tid;
1080 struct tlock *tlck;
1081 struct dt_lock *dtlck;
1082 struct lv *lv;
1083 int ipcount;
1084 struct inode *iplist[4];
1085 struct tblock *tblk;
1086 s64 new_size = 0;
1087 int commit_flag;
1088
1089 if (flags & ~RENAME_NOREPLACE)
1090 return -EINVAL;
1091
1092 jfs_info("jfs_rename: %pd %pd", old_d
1093
1094 rc = dquot_initialize(old_dir);
1095 if (rc)
1096 goto out1;
1097 rc = dquot_initialize(new_dir);
1098 if (rc)
1099 goto out1;
1100
1101 old_ip = d_inode(old_dentry);
1102 new_ip = d_inode(new_dentry);
1103
1104 if ((rc = get_UCSname(&old_dname, old
1105 goto out1;
1106
1107 if ((rc = get_UCSname(&new_dname, new
1108 goto out2;
1109
1110 /*
1111 * Make sure source inode number is w
1112 */
1113 rc = dtSearch(old_dir, &old_dname, &i
1114 if (rc || (ino != old_ip->i_ino)) {
1115 rc = -ENOENT;
1116 goto out3;
1117 }
1118
1119 /*
1120 * Make sure dest inode number (if an
1121 */
1122 rc = dtSearch(new_dir, &new_dname, &i
1123 if (!rc) {
1124 if ((!new_ip) || (ino != new_
1125 rc = -ESTALE;
1126 goto out3;
1127 }
1128 } else if (rc != -ENOENT)
1129 goto out3;
1130 else if (new_ip) {
1131 /* no entry exists, but one w
1132 rc = -ESTALE;
1133 goto out3;
1134 }
1135
1136 if (S_ISDIR(old_ip->i_mode)) {
1137 if (new_ip) {
1138 if (!dtEmpty(new_ip))
1139 rc = -ENOTEMP
1140 goto out3;
1141 }
1142 }
1143 } else if (new_ip) {
1144 IWRITE_LOCK(new_ip, RDWRLOCK_
1145 /* Init inode for quota opera
1146 rc = dquot_initialize(new_ip)
1147 if (rc)
1148 goto out_unlock;
1149 }
1150
1151 /*
1152 * The real work starts here
1153 */
1154 tid = txBegin(new_dir->i_sb, 0);
1155
1156 /*
1157 * How do we know the locking is safe
1158 * The vfs does the hard part for us.
1159 * commit_mutexes, the vfs already ha
1160 * Here, the vfs has already taken i_
1161 */
1162 mutex_lock_nested(&JFS_IP(new_dir)->c
1163 mutex_lock_nested(&JFS_IP(old_ip)->co
1164 if (old_dir != new_dir)
1165 mutex_lock_nested(&JFS_IP(old
1166 COMMIT_MUTE
1167
1168 if (new_ip) {
1169 mutex_lock_nested(&JFS_IP(new
1170 COMMIT_MUTE
1171 /*
1172 * Change existing directory
1173 */
1174 ino = new_ip->i_ino;
1175 rc = dtModify(tid, new_dir, &
1176 old_ip->i_ino,
1177 if (rc)
1178 goto out_tx;
1179 drop_nlink(new_ip);
1180 if (S_ISDIR(new_ip->i_mode))
1181 drop_nlink(new_ip);
1182 if (new_ip->i_nlink)
1183 mutex_unlock(
1184 if (old_dir !
1185 mutex
1186 mutex_unlock(
1187 mutex_unlock(
1188 if (!S_ISDIR(
1189 IWRIT
1190 jfs_error(new
1191 "ne
1192 return -EIO;
1193 }
1194 tblk = tid_to_tblock(
1195 tblk->xflag |= COMMIT
1196 tblk->u.ip = new_ip;
1197 } else if (new_ip->i_nlink ==
1198 assert(!test_cflag(CO
1199 /* free block resourc
1200 if ((new_size = commi
1201 txAbort(tid,
1202 rc = new_size
1203 goto out_tx;
1204 }
1205 tblk = tid_to_tblock(
1206 tblk->xflag |= COMMIT
1207 tblk->u.ip = new_ip;
1208 } else {
1209 inode_set_ctime_curre
1210 mark_inode_dirty(new_
1211 }
1212 } else {
1213 /*
1214 * Add new directory entry
1215 */
1216 rc = dtSearch(new_dir, &new_d
1217 JFS_CREATE);
1218 if (rc) {
1219 jfs_err("jfs_rename d
1220 rc);
1221 goto out_tx;
1222 }
1223
1224 ino = old_ip->i_ino;
1225 rc = dtInsert(tid, new_dir, &
1226 if (rc) {
1227 if (rc == -EIO)
1228 jfs_err("jfs_
1229 goto out_tx;
1230 }
1231 if (S_ISDIR(old_ip->i_mode))
1232 inc_nlink(new_dir);
1233 }
1234 /*
1235 * Remove old directory entry
1236 */
1237
1238 ino = old_ip->i_ino;
1239 rc = dtDelete(tid, old_dir, &old_dnam
1240 if (rc) {
1241 jfs_err("jfs_rename did not e
1242 rc);
1243 txAbort(tid, 1); /* Ma
1244 goto out_tx;
1245 }
1246 if (S_ISDIR(old_ip->i_mode)) {
1247 drop_nlink(old_dir);
1248 if (old_dir != new_dir) {
1249 /*
1250 * Change inode numbe
1251 */
1252
1253 JFS_IP(old_ip)->i_dtr
1254 cpu_to_le32(n
1255
1256 /* Linelock header of
1257 tlck = txLock(tid, ol
1258 (struct m
1259 tlckDTR
1260 dtlck = (struct dt_lo
1261 ASSERT(dtlck->index =
1262 lv = & dtlck->lv[0];
1263 lv->offset = 0;
1264 lv->length = 1;
1265 dtlck->index++;
1266 }
1267 }
1268
1269 /*
1270 * Update ctime on changed/moved inod
1271 */
1272 inode_set_ctime_current(old_ip);
1273 mark_inode_dirty(old_ip);
1274
1275 inode_set_mtime_to_ts(new_dir, inode_
1276 mark_inode_dirty(new_dir);
1277
1278 /* Build list of inodes modified by t
1279 ipcount = 0;
1280 iplist[ipcount++] = old_ip;
1281 if (new_ip)
1282 iplist[ipcount++] = new_ip;
1283 iplist[ipcount++] = old_dir;
1284
1285 if (old_dir != new_dir) {
1286 iplist[ipcount++] = new_dir;
1287 inode_set_mtime_to_ts(old_dir
1288 inode_s
1289 mark_inode_dirty(old_dir);
1290 }
1291
1292 /*
1293 * Incomplete truncate of file data c
1294 * result in timing problems unless w
1295 * transaction.
1296 */
1297 if (new_size)
1298 commit_flag = COMMIT_SYNC;
1299 else
1300 commit_flag = 0;
1301
1302 rc = txCommit(tid, ipcount, iplist, c
1303
1304 out_tx:
1305 txEnd(tid);
1306 if (new_ip)
1307 mutex_unlock(&JFS_IP(new_ip)-
1308 if (old_dir != new_dir)
1309 mutex_unlock(&JFS_IP(old_dir)
1310 mutex_unlock(&JFS_IP(old_ip)->commit_
1311 mutex_unlock(&JFS_IP(new_dir)->commit
1312
1313 while (new_size && (rc == 0)) {
1314 tid = txBegin(new_ip->i_sb, 0
1315 mutex_lock(&JFS_IP(new_ip)->c
1316 new_size = xtTruncate_pmap(ti
1317 if (new_size < 0) {
1318 txAbort(tid, 1);
1319 rc = new_size;
1320 } else
1321 rc = txCommit(tid, 1,
1322 txEnd(tid);
1323 mutex_unlock(&JFS_IP(new_ip)-
1324 }
1325 if (new_ip && (new_ip->i_nlink == 0))
1326 set_cflag(COMMIT_Nolink, new_
1327 /*
1328 * Truncating the directory index tab
1329 * may need to be done iteratively
1330 */
1331 if (test_cflag(COMMIT_Stale, old_dir)
1332 if (old_dir->i_size > 1)
1333 jfs_truncate_nolock(o
1334
1335 clear_cflag(COMMIT_Stale, old
1336 }
1337 out_unlock:
1338 if (new_ip && !S_ISDIR(new_ip->i_mode
1339 IWRITE_UNLOCK(new_ip);
1340 out3:
1341 free_UCSname(&new_dname);
1342 out2:
1343 free_UCSname(&old_dname);
1344 out1:
1345 jfs_info("jfs_rename: returning %d",
1346 return rc;
1347 }
1348
1349
1350 /*
1351 * NAME: jfs_mknod
1352 *
1353 * FUNCTION: Create a special file (device
1354 */
1355 static int jfs_mknod(struct mnt_idmap *idmap,
1356 struct dentry *dentry, u
1357 {
1358 struct jfs_inode_info *jfs_ip;
1359 struct btstack btstack;
1360 struct component_name dname;
1361 ino_t ino;
1362 struct inode *ip;
1363 struct inode *iplist[2];
1364 int rc;
1365 tid_t tid;
1366 struct tblock *tblk;
1367
1368 jfs_info("jfs_mknod: %pd", dentry);
1369
1370 rc = dquot_initialize(dir);
1371 if (rc)
1372 goto out;
1373
1374 if ((rc = get_UCSname(&dname, dentry)
1375 goto out;
1376
1377 ip = ialloc(dir, mode);
1378 if (IS_ERR(ip)) {
1379 rc = PTR_ERR(ip);
1380 goto out1;
1381 }
1382 jfs_ip = JFS_IP(ip);
1383
1384 tid = txBegin(dir->i_sb, 0);
1385
1386 mutex_lock_nested(&JFS_IP(dir)->commi
1387 mutex_lock_nested(&JFS_IP(ip)->commit
1388
1389 rc = jfs_init_acl(tid, ip, dir);
1390 if (rc)
1391 goto out3;
1392
1393 rc = jfs_init_security(tid, ip, dir,
1394 if (rc) {
1395 txAbort(tid, 0);
1396 goto out3;
1397 }
1398
1399 if ((rc = dtSearch(dir, &dname, &ino,
1400 txAbort(tid, 0);
1401 goto out3;
1402 }
1403
1404 tblk = tid_to_tblock(tid);
1405 tblk->xflag |= COMMIT_CREATE;
1406 tblk->ino = ip->i_ino;
1407 tblk->u.ixpxd = JFS_IP(ip)->ixpxd;
1408
1409 ino = ip->i_ino;
1410 if ((rc = dtInsert(tid, dir, &dname,
1411 txAbort(tid, 0);
1412 goto out3;
1413 }
1414
1415 ip->i_op = &jfs_file_inode_operations
1416 jfs_ip->dev = new_encode_dev(rdev);
1417 init_special_inode(ip, ip->i_mode, rd
1418
1419 mark_inode_dirty(ip);
1420
1421 inode_set_mtime_to_ts(dir, inode_set_
1422
1423 mark_inode_dirty(dir);
1424
1425 iplist[0] = dir;
1426 iplist[1] = ip;
1427 rc = txCommit(tid, 2, iplist, 0);
1428
1429 out3:
1430 txEnd(tid);
1431 mutex_unlock(&JFS_IP(ip)->commit_mute
1432 mutex_unlock(&JFS_IP(dir)->commit_mut
1433 if (rc) {
1434 free_ea_wmap(ip);
1435 clear_nlink(ip);
1436 discard_new_inode(ip);
1437 } else {
1438 d_instantiate_new(dentry, ip)
1439 }
1440
1441 out1:
1442 free_UCSname(&dname);
1443
1444 out:
1445 jfs_info("jfs_mknod: returning %d", r
1446 return rc;
1447 }
1448
1449 static struct dentry *jfs_lookup(struct inode
1450 {
1451 struct btstack btstack;
1452 ino_t inum;
1453 struct inode *ip;
1454 struct component_name key;
1455 int rc;
1456
1457 jfs_info("jfs_lookup: name = %pd", de
1458
1459 if ((rc = get_UCSname(&key, dentry)))
1460 return ERR_PTR(rc);
1461 rc = dtSearch(dip, &key, &inum, &btst
1462 free_UCSname(&key);
1463 if (rc == -ENOENT) {
1464 ip = NULL;
1465 } else if (rc) {
1466 jfs_err("jfs_lookup: dtSearch
1467 ip = ERR_PTR(rc);
1468 } else {
1469 ip = jfs_iget(dip->i_sb, inum
1470 if (IS_ERR(ip))
1471 jfs_err("jfs_lookup:
1472 }
1473
1474 return d_splice_alias(ip, dentry);
1475 }
1476
1477 static struct inode *jfs_nfs_get_inode(struct
1478 u64 ino, u32 generation)
1479 {
1480 struct inode *inode;
1481
1482 if (ino == 0)
1483 return ERR_PTR(-ESTALE);
1484 inode = jfs_iget(sb, ino);
1485 if (IS_ERR(inode))
1486 return ERR_CAST(inode);
1487
1488 if (generation && inode->i_generation
1489 iput(inode);
1490 return ERR_PTR(-ESTALE);
1491 }
1492
1493 return inode;
1494 }
1495
1496 struct dentry *jfs_fh_to_dentry(struct super_
1497 int fh_len, int fh_type)
1498 {
1499 return generic_fh_to_dentry(sb, fid,
1500 jfs_nfs_g
1501 }
1502
1503 struct dentry *jfs_fh_to_parent(struct super_
1504 int fh_len, int fh_type)
1505 {
1506 return generic_fh_to_parent(sb, fid,
1507 jfs_nfs_g
1508 }
1509
1510 struct dentry *jfs_get_parent(struct dentry *
1511 {
1512 unsigned long parent_ino;
1513
1514 parent_ino =
1515 le32_to_cpu(JFS_IP(d_inode(de
1516
1517 return d_obtain_alias(jfs_iget(dentry
1518 }
1519
1520 const struct inode_operations jfs_dir_inode_o
1521 .create = jfs_create,
1522 .lookup = jfs_lookup,
1523 .link = jfs_link,
1524 .unlink = jfs_unlink,
1525 .symlink = jfs_symlink,
1526 .mkdir = jfs_mkdir,
1527 .rmdir = jfs_rmdir,
1528 .mknod = jfs_mknod,
1529 .rename = jfs_rename,
1530 .listxattr = jfs_listxattr,
1531 .setattr = jfs_setattr,
1532 .fileattr_get = jfs_fileattr_get,
1533 .fileattr_set = jfs_fileattr_set,
1534 #ifdef CONFIG_JFS_POSIX_ACL
1535 .get_inode_acl = jfs_get_acl,
1536 .set_acl = jfs_set_acl,
1537 #endif
1538 };
1539
1540 WRAP_DIR_ITER(jfs_readdir) // FIXME!
1541 const struct file_operations jfs_dir_operatio
1542 .read = generic_read_dir,
1543 .iterate_shared = shared_jfs_readdir,
1544 .fsync = jfs_fsync,
1545 .unlocked_ioctl = jfs_ioctl,
1546 .compat_ioctl = compat_ptr_ioctl,
1547 .llseek = generic_file_llseek
1548 };
1549
1550 static int jfs_ci_hash(const struct dentry *d
1551 {
1552 unsigned long hash;
1553 int i;
1554
1555 hash = init_name_hash(dir);
1556 for (i=0; i < this->len; i++)
1557 hash = partial_name_hash(tolo
1558 this->hash = end_name_hash(hash);
1559
1560 return 0;
1561 }
1562
1563 static int jfs_ci_compare(const struct dentry
1564 unsigned int len, const char
1565 {
1566 int i, result = 1;
1567
1568 if (len != name->len)
1569 goto out;
1570 for (i=0; i < len; i++) {
1571 if (tolower(str[i]) != tolowe
1572 goto out;
1573 }
1574 result = 0;
1575 out:
1576 return result;
1577 }
1578
1579 static int jfs_ci_revalidate(struct dentry *d
1580 {
1581 /*
1582 * This is not negative dentry. Alway
1583 *
1584 * Note, rename() to existing directo
1585 * and will use existing name which i
1586 *
1587 * We may be able to drop this positi
1588 * positive dentry isn't good idea. S
1589 * rename("filename", "FILENAME") for
1590 */
1591 if (d_really_is_positive(dentry))
1592 return 1;
1593
1594 /*
1595 * This may be nfsd (or something), a
1596 * intent of this. So, since this can
1597 */
1598 if (!flags)
1599 return 0;
1600
1601 /*
1602 * Drop the negative dentry, in order
1603 * case sensitive name which is speci
1604 * for creation.
1605 */
1606 if (flags & (LOOKUP_CREATE | LOOKUP_R
1607 return 0;
1608 return 1;
1609 }
1610
1611 const struct dentry_operations jfs_ci_dentry_
1612 {
1613 .d_hash = jfs_ci_hash,
1614 .d_compare = jfs_ci_compare,
1615 .d_revalidate = jfs_ci_revalidate,
1616 };
1617
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