2 * Copyright (C) International Business Machines Corp., 2000-2004
3 * Portions Copyright (C) Christoph Hellwig, 2001-2002
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation; either version 2 of the License, or
8 * (at your option) any later version.
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
13 * the GNU General Public License for more details.
15 * You should have received a copy of the GNU General Public License
16 * along with this program; if not, write to the Free Software
17 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
21 #include <linux/ctype.h>
22 #include <linux/quotaops.h>
23 #include "jfs_incore.h"
24 #include "jfs_superblock.h"
25 #include "jfs_inode.h"
26 #include "jfs_dinode.h"
28 #include "jfs_unicode.h"
29 #include "jfs_metapage.h"
30 #include "jfs_xattr.h"
32 #include "jfs_debug.h"
37 struct dentry_operations jfs_ci_dentry_operations
;
39 static s64
commitZeroLink(tid_t
, struct inode
*);
42 * NAME: free_ea_wmap(inode)
44 * FUNCTION: free uncommitted extended attributes from working map
47 static inline void free_ea_wmap(struct inode
*inode
)
49 dxd_t
*ea
= &JFS_IP(inode
)->ea
;
51 if (ea
->flag
& DXD_EXTENT
) {
52 /* free EA pages from cache */
53 invalidate_dxd_metapages(inode
, *ea
);
54 dbFree(inode
, addressDXD(ea
), lengthDXD(ea
));
60 * NAME: jfs_create(dip, dentry, mode)
62 * FUNCTION: create a regular file in the parent directory <dip>
63 * with name = <from dentry> and mode = <mode>
65 * PARAMETER: dip - parent directory vnode
66 * dentry - dentry of new file
67 * mode - create mode (rwxrwxrwx).
70 * RETURN: Errors from subroutines
73 static int jfs_create(struct inode
*dip
, struct dentry
*dentry
, int mode
,
77 tid_t tid
; /* transaction id */
78 struct inode
*ip
= NULL
; /* child directory inode */
80 struct component_name dname
; /* child directory name */
81 struct btstack btstack
;
82 struct inode
*iplist
[2];
85 jfs_info("jfs_create: dip:0x%p name:%s", dip
, dentry
->d_name
.name
);
88 * search parent directory for entry/freespace
89 * (dtSearch() returns parent directory page pinned)
91 if ((rc
= get_UCSname(&dname
, dentry
)))
95 * Either iAlloc() or txBegin() may block. Deadlock can occur if we
96 * block there while holding dtree page, so we allocate the inode &
97 * begin the transaction before we search the directory.
99 ip
= ialloc(dip
, mode
);
105 tid
= txBegin(dip
->i_sb
, 0);
107 mutex_lock(&JFS_IP(dip
)->commit_mutex
);
108 mutex_lock(&JFS_IP(ip
)->commit_mutex
);
110 rc
= jfs_init_acl(tid
, ip
, dip
);
114 rc
= jfs_init_security(tid
, ip
, dip
);
120 if ((rc
= dtSearch(dip
, &dname
, &ino
, &btstack
, JFS_CREATE
))) {
121 jfs_err("jfs_create: dtSearch returned %d", rc
);
126 tblk
= tid_to_tblock(tid
);
127 tblk
->xflag
|= COMMIT_CREATE
;
128 tblk
->ino
= ip
->i_ino
;
129 tblk
->u
.ixpxd
= JFS_IP(ip
)->ixpxd
;
135 * initialize the child XAD tree root in-line in inode
140 * create entry in parent directory for child directory
141 * (dtInsert() releases parent directory page)
144 if ((rc
= dtInsert(tid
, dip
, &dname
, &ino
, &btstack
))) {
146 jfs_err("jfs_create: dtInsert returned -EIO");
147 txAbort(tid
, 1); /* Marks Filesystem dirty */
149 txAbort(tid
, 0); /* Filesystem full */
153 ip
->i_op
= &jfs_file_inode_operations
;
154 ip
->i_fop
= &jfs_file_operations
;
155 ip
->i_mapping
->a_ops
= &jfs_aops
;
157 insert_inode_hash(ip
);
158 mark_inode_dirty(ip
);
160 dip
->i_ctime
= dip
->i_mtime
= CURRENT_TIME
;
162 mark_inode_dirty(dip
);
164 rc
= txCommit(tid
, 2, &iplist
[0], 0);
168 mutex_unlock(&JFS_IP(dip
)->commit_mutex
);
169 mutex_unlock(&JFS_IP(ip
)->commit_mutex
);
175 d_instantiate(dentry
, ip
);
178 free_UCSname(&dname
);
182 jfs_info("jfs_create: rc:%d", rc
);
188 * NAME: jfs_mkdir(dip, dentry, mode)
190 * FUNCTION: create a child directory in the parent directory <dip>
191 * with name = <from dentry> and mode = <mode>
193 * PARAMETER: dip - parent directory vnode
194 * dentry - dentry of child directory
195 * mode - create mode (rwxrwxrwx).
197 * RETURN: Errors from subroutines
200 * EACCESS: user needs search+write permission on the parent directory
202 static int jfs_mkdir(struct inode
*dip
, struct dentry
*dentry
, int mode
)
205 tid_t tid
; /* transaction id */
206 struct inode
*ip
= NULL
; /* child directory inode */
208 struct component_name dname
; /* child directory name */
209 struct btstack btstack
;
210 struct inode
*iplist
[2];
213 jfs_info("jfs_mkdir: dip:0x%p name:%s", dip
, dentry
->d_name
.name
);
215 /* link count overflow on parent directory ? */
216 if (dip
->i_nlink
== JFS_LINK_MAX
) {
222 * search parent directory for entry/freespace
223 * (dtSearch() returns parent directory page pinned)
225 if ((rc
= get_UCSname(&dname
, dentry
)))
229 * Either iAlloc() or txBegin() may block. Deadlock can occur if we
230 * block there while holding dtree page, so we allocate the inode &
231 * begin the transaction before we search the directory.
233 ip
= ialloc(dip
, S_IFDIR
| mode
);
239 tid
= txBegin(dip
->i_sb
, 0);
241 mutex_lock(&JFS_IP(dip
)->commit_mutex
);
242 mutex_lock(&JFS_IP(ip
)->commit_mutex
);
244 rc
= jfs_init_acl(tid
, ip
, dip
);
248 rc
= jfs_init_security(tid
, ip
, dip
);
254 if ((rc
= dtSearch(dip
, &dname
, &ino
, &btstack
, JFS_CREATE
))) {
255 jfs_err("jfs_mkdir: dtSearch returned %d", rc
);
260 tblk
= tid_to_tblock(tid
);
261 tblk
->xflag
|= COMMIT_CREATE
;
262 tblk
->ino
= ip
->i_ino
;
263 tblk
->u
.ixpxd
= JFS_IP(ip
)->ixpxd
;
269 * initialize the child directory in-line in inode
271 dtInitRoot(tid
, ip
, dip
->i_ino
);
274 * create entry in parent directory for child directory
275 * (dtInsert() releases parent directory page)
278 if ((rc
= dtInsert(tid
, dip
, &dname
, &ino
, &btstack
))) {
280 jfs_err("jfs_mkdir: dtInsert returned -EIO");
281 txAbort(tid
, 1); /* Marks Filesystem dirty */
283 txAbort(tid
, 0); /* Filesystem full */
287 ip
->i_nlink
= 2; /* for '.' */
288 ip
->i_op
= &jfs_dir_inode_operations
;
289 ip
->i_fop
= &jfs_dir_operations
;
291 insert_inode_hash(ip
);
292 mark_inode_dirty(ip
);
294 /* update parent directory inode */
295 dip
->i_nlink
++; /* for '..' from child directory */
296 dip
->i_ctime
= dip
->i_mtime
= CURRENT_TIME
;
297 mark_inode_dirty(dip
);
299 rc
= txCommit(tid
, 2, &iplist
[0], 0);
303 mutex_unlock(&JFS_IP(dip
)->commit_mutex
);
304 mutex_unlock(&JFS_IP(ip
)->commit_mutex
);
310 d_instantiate(dentry
, ip
);
313 free_UCSname(&dname
);
318 jfs_info("jfs_mkdir: rc:%d", rc
);
323 * NAME: jfs_rmdir(dip, dentry)
325 * FUNCTION: remove a link to child directory
327 * PARAMETER: dip - parent inode
328 * dentry - child directory dentry
330 * RETURN: -EINVAL - if name is . or ..
331 * -EINVAL - if . or .. exist but are invalid.
332 * errors from subroutines
335 * if other threads have the directory open when the last link
336 * is removed, the "." and ".." entries, if present, are removed before
337 * rmdir() returns and no new entries may be created in the directory,
338 * but the directory is not removed until the last reference to
339 * the directory is released (cf.unlink() of regular file).
341 static int jfs_rmdir(struct inode
*dip
, struct dentry
*dentry
)
344 tid_t tid
; /* transaction id */
345 struct inode
*ip
= dentry
->d_inode
;
347 struct component_name dname
;
348 struct inode
*iplist
[2];
351 jfs_info("jfs_rmdir: dip:0x%p name:%s", dip
, dentry
->d_name
.name
);
353 /* Init inode for quota operations. */
356 /* directory must be empty to be removed */
362 if ((rc
= get_UCSname(&dname
, dentry
))) {
366 tid
= txBegin(dip
->i_sb
, 0);
368 mutex_lock(&JFS_IP(dip
)->commit_mutex
);
369 mutex_lock(&JFS_IP(ip
)->commit_mutex
);
374 tblk
= tid_to_tblock(tid
);
375 tblk
->xflag
|= COMMIT_DELETE
;
379 * delete the entry of target directory from parent directory
382 if ((rc
= dtDelete(tid
, dip
, &dname
, &ino
, JFS_REMOVE
))) {
383 jfs_err("jfs_rmdir: dtDelete returned %d", rc
);
387 mutex_unlock(&JFS_IP(dip
)->commit_mutex
);
388 mutex_unlock(&JFS_IP(ip
)->commit_mutex
);
393 /* update parent directory's link count corresponding
394 * to ".." entry of the target directory deleted
397 dip
->i_ctime
= dip
->i_mtime
= CURRENT_TIME
;
398 mark_inode_dirty(dip
);
401 * OS/2 could have created EA and/or ACL
403 /* free EA from both persistent and working map */
404 if (JFS_IP(ip
)->ea
.flag
& DXD_EXTENT
) {
406 txEA(tid
, ip
, &JFS_IP(ip
)->ea
, NULL
);
408 JFS_IP(ip
)->ea
.flag
= 0;
410 /* free ACL from both persistent and working map */
411 if (JFS_IP(ip
)->acl
.flag
& DXD_EXTENT
) {
413 txEA(tid
, ip
, &JFS_IP(ip
)->acl
, NULL
);
415 JFS_IP(ip
)->acl
.flag
= 0;
417 /* mark the target directory as deleted */
419 mark_inode_dirty(ip
);
421 rc
= txCommit(tid
, 2, &iplist
[0], 0);
425 mutex_unlock(&JFS_IP(dip
)->commit_mutex
);
426 mutex_unlock(&JFS_IP(ip
)->commit_mutex
);
429 * Truncating the directory index table is not guaranteed. It
430 * may need to be done iteratively
432 if (test_cflag(COMMIT_Stale
, dip
)) {
434 jfs_truncate_nolock(dip
, 0);
436 clear_cflag(COMMIT_Stale
, dip
);
440 free_UCSname(&dname
);
443 jfs_info("jfs_rmdir: rc:%d", rc
);
448 * NAME: jfs_unlink(dip, dentry)
450 * FUNCTION: remove a link to object <vp> named by <name>
451 * from parent directory <dvp>
453 * PARAMETER: dip - inode of parent directory
454 * dentry - dentry of object to be removed
456 * RETURN: errors from subroutines
459 * temporary file: if one or more processes have the file open
460 * when the last link is removed, the link will be removed before
461 * unlink() returns, but the removal of the file contents will be
462 * postponed until all references to the files are closed.
464 * JFS does NOT support unlink() on directories.
467 static int jfs_unlink(struct inode
*dip
, struct dentry
*dentry
)
470 tid_t tid
; /* transaction id */
471 struct inode
*ip
= dentry
->d_inode
;
473 struct component_name dname
; /* object name */
474 struct inode
*iplist
[2];
479 jfs_info("jfs_unlink: dip:0x%p name:%s", dip
, dentry
->d_name
.name
);
481 /* Init inode for quota operations. */
484 if ((rc
= get_UCSname(&dname
, dentry
)))
489 tid
= txBegin(dip
->i_sb
, 0);
491 mutex_lock(&JFS_IP(dip
)->commit_mutex
);
492 mutex_lock(&JFS_IP(ip
)->commit_mutex
);
498 * delete the entry of target file from parent directory
501 if ((rc
= dtDelete(tid
, dip
, &dname
, &ino
, JFS_REMOVE
))) {
502 jfs_err("jfs_unlink: dtDelete returned %d", rc
);
504 txAbort(tid
, 1); /* Marks FS Dirty */
506 mutex_unlock(&JFS_IP(dip
)->commit_mutex
);
507 mutex_unlock(&JFS_IP(ip
)->commit_mutex
);
514 ip
->i_ctime
= dip
->i_ctime
= dip
->i_mtime
= CURRENT_TIME
;
515 mark_inode_dirty(dip
);
517 /* update target's inode */
519 mark_inode_dirty(ip
);
522 * commit zero link count object
524 if (ip
->i_nlink
== 0) {
525 assert(!test_cflag(COMMIT_Nolink
, ip
));
526 /* free block resources */
527 if ((new_size
= commitZeroLink(tid
, ip
)) < 0) {
528 txAbort(tid
, 1); /* Marks FS Dirty */
530 mutex_unlock(&JFS_IP(dip
)->commit_mutex
);
531 mutex_unlock(&JFS_IP(ip
)->commit_mutex
);
536 tblk
= tid_to_tblock(tid
);
537 tblk
->xflag
|= COMMIT_DELETE
;
542 * Incomplete truncate of file data can
543 * result in timing problems unless we synchronously commit the
547 commit_flag
= COMMIT_SYNC
;
552 * If xtTruncate was incomplete, commit synchronously to avoid
553 * timing complications
555 rc
= txCommit(tid
, 2, &iplist
[0], commit_flag
);
559 mutex_unlock(&JFS_IP(dip
)->commit_mutex
);
560 mutex_unlock(&JFS_IP(ip
)->commit_mutex
);
563 while (new_size
&& (rc
== 0)) {
564 tid
= txBegin(dip
->i_sb
, 0);
565 mutex_lock(&JFS_IP(ip
)->commit_mutex
);
566 new_size
= xtTruncate_pmap(tid
, ip
, new_size
);
568 txAbort(tid
, 1); /* Marks FS Dirty */
571 rc
= txCommit(tid
, 2, &iplist
[0], COMMIT_SYNC
);
573 mutex_unlock(&JFS_IP(ip
)->commit_mutex
);
576 if (ip
->i_nlink
== 0)
577 set_cflag(COMMIT_Nolink
, ip
);
582 * Truncating the directory index table is not guaranteed. It
583 * may need to be done iteratively
585 if (test_cflag(COMMIT_Stale
, dip
)) {
587 jfs_truncate_nolock(dip
, 0);
589 clear_cflag(COMMIT_Stale
, dip
);
593 free_UCSname(&dname
);
595 jfs_info("jfs_unlink: rc:%d", rc
);
600 * NAME: commitZeroLink()
602 * FUNCTION: for non-directory, called by jfs_remove(),
603 * truncate a regular file, directory or symbolic
604 * link to zero length. return 0 if type is not
607 * if the file is currently associated with a VM segment
608 * only permanent disk and inode map resources are freed,
609 * and neither the inode nor indirect blocks are modified
610 * so that the resources can be later freed in the work
612 * if there is no VM segment on entry, the resources are
613 * freed in both work and permanent map.
614 * (? for temporary file - memory object is cached even
615 * after no reference:
616 * reference count > 0 - )
618 * PARAMETERS: cd - pointer to commit data structure.
619 * current inode is the one to truncate.
621 * RETURN: Errors from subroutines
623 static s64
commitZeroLink(tid_t tid
, struct inode
*ip
)
628 jfs_info("commitZeroLink: tid = %d, ip = 0x%p", tid
, ip
);
630 filetype
= ip
->i_mode
& S_IFMT
;
635 /* fast symbolic link */
636 if (ip
->i_size
< IDATASIZE
) {
642 assert(filetype
!= S_IFDIR
);
646 set_cflag(COMMIT_Freewmap
, ip
);
648 /* mark transaction of block map update type */
649 tblk
= tid_to_tblock(tid
);
650 tblk
->xflag
|= COMMIT_PMAP
;
655 if (JFS_IP(ip
)->ea
.flag
& DXD_EXTENT
)
656 /* acquire maplock on EA to be freed from block map */
657 txEA(tid
, ip
, &JFS_IP(ip
)->ea
, NULL
);
662 if (JFS_IP(ip
)->acl
.flag
& DXD_EXTENT
)
663 /* acquire maplock on EA to be freed from block map */
664 txEA(tid
, ip
, &JFS_IP(ip
)->acl
, NULL
);
667 * free xtree/data (truncate to zero length):
668 * free xtree/data pages from cache if COMMIT_PWMAP,
669 * free xtree/data blocks from persistent block map, and
670 * free xtree/data blocks from working block map if COMMIT_PWMAP;
673 return xtTruncate_pmap(tid
, ip
, 0);
680 * NAME: jfs_free_zero_link()
682 * FUNCTION: for non-directory, called by iClose(),
683 * free resources of a file from cache and WORKING map
684 * for a file previously committed with zero link count
685 * while associated with a pager object,
687 * PARAMETER: ip - pointer to inode of file.
689 void jfs_free_zero_link(struct inode
*ip
)
693 jfs_info("jfs_free_zero_link: ip = 0x%p", ip
);
695 /* return if not reg or symbolic link or if size is
698 type
= ip
->i_mode
& S_IFMT
;
704 /* if its contained in inode nothing to do */
705 if (ip
->i_size
< IDATASIZE
)
715 if (JFS_IP(ip
)->ea
.flag
& DXD_EXTENT
) {
716 s64 xaddr
= addressDXD(&JFS_IP(ip
)->ea
);
717 int xlen
= lengthDXD(&JFS_IP(ip
)->ea
);
718 struct maplock maplock
; /* maplock for COMMIT_WMAP */
719 struct pxd_lock
*pxdlock
; /* maplock for COMMIT_WMAP */
721 /* free EA pages from cache */
722 invalidate_dxd_metapages(ip
, JFS_IP(ip
)->ea
);
724 /* free EA extent from working block map */
726 pxdlock
= (struct pxd_lock
*) & maplock
;
727 pxdlock
->flag
= mlckFREEPXD
;
728 PXDaddress(&pxdlock
->pxd
, xaddr
);
729 PXDlength(&pxdlock
->pxd
, xlen
);
730 txFreeMap(ip
, pxdlock
, NULL
, COMMIT_WMAP
);
736 if (JFS_IP(ip
)->acl
.flag
& DXD_EXTENT
) {
737 s64 xaddr
= addressDXD(&JFS_IP(ip
)->acl
);
738 int xlen
= lengthDXD(&JFS_IP(ip
)->acl
);
739 struct maplock maplock
; /* maplock for COMMIT_WMAP */
740 struct pxd_lock
*pxdlock
; /* maplock for COMMIT_WMAP */
742 invalidate_dxd_metapages(ip
, JFS_IP(ip
)->acl
);
744 /* free ACL extent from working block map */
746 pxdlock
= (struct pxd_lock
*) & maplock
;
747 pxdlock
->flag
= mlckFREEPXD
;
748 PXDaddress(&pxdlock
->pxd
, xaddr
);
749 PXDlength(&pxdlock
->pxd
, xlen
);
750 txFreeMap(ip
, pxdlock
, NULL
, COMMIT_WMAP
);
754 * free xtree/data (truncate to zero length):
755 * free xtree/data pages from cache, and
756 * free xtree/data blocks from working block map;
759 xtTruncate(0, ip
, 0, COMMIT_WMAP
);
763 * NAME: jfs_link(vp, dvp, name, crp)
765 * FUNCTION: create a link to <vp> by the name = <name>
766 * in the parent directory <dvp>
768 * PARAMETER: vp - target object
769 * dvp - parent directory of new link
770 * name - name of new link to target object
773 * RETURN: Errors from subroutines
776 * JFS does NOT support link() on directories (to prevent circular
777 * path in the directory hierarchy);
778 * EPERM: the target object is a directory, and either the caller
779 * does not have appropriate privileges or the implementation prohibits
780 * using link() on directories [XPG4.2].
782 * JFS does NOT support links between file systems:
783 * EXDEV: target object and new link are on different file systems and
784 * implementation does not support links between file systems [XPG4.2].
786 static int jfs_link(struct dentry
*old_dentry
,
787 struct inode
*dir
, struct dentry
*dentry
)
791 struct inode
*ip
= old_dentry
->d_inode
;
793 struct component_name dname
;
794 struct btstack btstack
;
795 struct inode
*iplist
[2];
797 jfs_info("jfs_link: %s %s", old_dentry
->d_name
.name
,
798 dentry
->d_name
.name
);
800 if (ip
->i_nlink
== JFS_LINK_MAX
)
803 if (ip
->i_nlink
== 0)
806 tid
= txBegin(ip
->i_sb
, 0);
808 mutex_lock(&JFS_IP(dir
)->commit_mutex
);
809 mutex_lock(&JFS_IP(ip
)->commit_mutex
);
812 * scan parent directory for entry/freespace
814 if ((rc
= get_UCSname(&dname
, dentry
)))
817 if ((rc
= dtSearch(dir
, &dname
, &ino
, &btstack
, JFS_CREATE
)))
821 * create entry for new link in parent directory
824 if ((rc
= dtInsert(tid
, dir
, &dname
, &ino
, &btstack
)))
827 /* update object inode */
828 ip
->i_nlink
++; /* for new link */
829 ip
->i_ctime
= CURRENT_TIME
;
830 dir
->i_ctime
= dir
->i_mtime
= CURRENT_TIME
;
831 mark_inode_dirty(dir
);
832 atomic_inc(&ip
->i_count
);
836 rc
= txCommit(tid
, 2, &iplist
[0], 0);
842 d_instantiate(dentry
, ip
);
845 free_UCSname(&dname
);
850 mutex_unlock(&JFS_IP(dir
)->commit_mutex
);
851 mutex_unlock(&JFS_IP(ip
)->commit_mutex
);
853 jfs_info("jfs_link: rc:%d", rc
);
858 * NAME: jfs_symlink(dip, dentry, name)
860 * FUNCTION: creates a symbolic link to <symlink> by name <name>
863 * PARAMETER: dip - parent directory vnode
864 * dentry - dentry of symbolic link
865 * name - the path name of the existing object
866 * that will be the source of the link
868 * RETURN: errors from subroutines
871 * ENAMETOOLONG: pathname resolution of a symbolic link produced
872 * an intermediate result whose length exceeds PATH_MAX [XPG4.2]
875 static int jfs_symlink(struct inode
*dip
, struct dentry
*dentry
,
881 struct component_name dname
;
882 int ssize
; /* source pathname size */
883 struct btstack btstack
;
884 struct inode
*ip
= dentry
->d_inode
;
885 unchar
*i_fastsymlink
;
887 int bmask
= 0, xsize
;
888 s64 extent
= 0, xaddr
;
890 struct super_block
*sb
;
893 struct inode
*iplist
[2];
895 jfs_info("jfs_symlink: dip:0x%p name:%s", dip
, name
);
897 ssize
= strlen(name
) + 1;
900 * search parent directory for entry/freespace
901 * (dtSearch() returns parent directory page pinned)
904 if ((rc
= get_UCSname(&dname
, dentry
)))
908 * allocate on-disk/in-memory inode for symbolic link:
909 * (iAlloc() returns new, locked inode)
911 ip
= ialloc(dip
, S_IFLNK
| 0777);
917 tid
= txBegin(dip
->i_sb
, 0);
919 mutex_lock(&JFS_IP(dip
)->commit_mutex
);
920 mutex_lock(&JFS_IP(ip
)->commit_mutex
);
922 rc
= jfs_init_security(tid
, ip
, dip
);
926 tblk
= tid_to_tblock(tid
);
927 tblk
->xflag
|= COMMIT_CREATE
;
928 tblk
->ino
= ip
->i_ino
;
929 tblk
->u
.ixpxd
= JFS_IP(ip
)->ixpxd
;
931 /* fix symlink access permission
932 * (dir_create() ANDs in the u.u_cmask,
933 * but symlinks really need to be 777 access)
938 * write symbolic link target path name
943 * write source path name inline in on-disk inode (fast symbolic link)
946 if (ssize
<= IDATASIZE
) {
947 ip
->i_op
= &jfs_symlink_inode_operations
;
949 i_fastsymlink
= JFS_IP(ip
)->i_inline
;
950 memcpy(i_fastsymlink
, name
, ssize
);
951 ip
->i_size
= ssize
- 1;
954 * if symlink is > 128 bytes, we don't have the space to
955 * store inline extended attributes
957 if (ssize
> sizeof (JFS_IP(ip
)->i_inline
))
958 JFS_IP(ip
)->mode2
&= ~INLINEEA
;
960 jfs_info("jfs_symlink: fast symlink added ssize:%d name:%s ",
964 * write source path name in a single extent
967 jfs_info("jfs_symlink: allocate extent ip:0x%p", ip
);
969 ip
->i_op
= &page_symlink_inode_operations
;
970 ip
->i_mapping
->a_ops
= &jfs_aops
;
973 * even though the data of symlink object (source
974 * path name) is treated as non-journaled user data,
975 * it is read/written thru buffer cache for performance.
978 bmask
= JFS_SBI(sb
)->bsize
- 1;
979 xsize
= (ssize
+ bmask
) & ~bmask
;
981 xlen
= xsize
>> JFS_SBI(sb
)->l2bsize
;
982 if ((rc
= xtInsert(tid
, ip
, 0, 0, xlen
, &xaddr
, 0))) {
988 ip
->i_size
= ssize
- 1;
990 /* This is kind of silly since PATH_MAX == 4K */
991 int copy_size
= min(ssize
, PSIZE
);
993 mp
= get_metapage(ip
, xaddr
, PSIZE
, 1);
996 xtTruncate(tid
, ip
, 0, COMMIT_PWMAP
);
1001 memcpy(mp
->data
, name
, copy_size
);
1005 xaddr
+= JFS_SBI(sb
)->nbperpage
;
1010 * create entry for symbolic link in parent directory
1012 rc
= dtSearch(dip
, &dname
, &ino
, &btstack
, JFS_CREATE
);
1015 rc
= dtInsert(tid
, dip
, &dname
, &ino
, &btstack
);
1019 xtTruncate(tid
, ip
, 0, COMMIT_PWMAP
);
1021 /* discard new inode */
1025 insert_inode_hash(ip
);
1026 mark_inode_dirty(ip
);
1028 dip
->i_ctime
= dip
->i_mtime
= CURRENT_TIME
;
1029 mark_inode_dirty(dip
);
1031 * commit update of parent directory and link object
1036 rc
= txCommit(tid
, 2, &iplist
[0], 0);
1040 mutex_unlock(&JFS_IP(dip
)->commit_mutex
);
1041 mutex_unlock(&JFS_IP(ip
)->commit_mutex
);
1047 d_instantiate(dentry
, ip
);
1050 free_UCSname(&dname
);
1053 jfs_info("jfs_symlink: rc:%d", rc
);
1061 * FUNCTION: rename a file or directory
1063 static int jfs_rename(struct inode
*old_dir
, struct dentry
*old_dentry
,
1064 struct inode
*new_dir
, struct dentry
*new_dentry
)
1066 struct btstack btstack
;
1068 struct component_name new_dname
;
1069 struct inode
*new_ip
;
1070 struct component_name old_dname
;
1071 struct inode
*old_ip
;
1075 struct dt_lock
*dtlck
;
1078 struct inode
*iplist
[4];
1079 struct tblock
*tblk
;
1084 jfs_info("jfs_rename: %s %s", old_dentry
->d_name
.name
,
1085 new_dentry
->d_name
.name
);
1087 old_ip
= old_dentry
->d_inode
;
1088 new_ip
= new_dentry
->d_inode
;
1090 if ((rc
= get_UCSname(&old_dname
, old_dentry
)))
1093 if ((rc
= get_UCSname(&new_dname
, new_dentry
)))
1097 * Make sure source inode number is what we think it is
1099 rc
= dtSearch(old_dir
, &old_dname
, &ino
, &btstack
, JFS_LOOKUP
);
1100 if (rc
|| (ino
!= old_ip
->i_ino
)) {
1106 * Make sure dest inode number (if any) is what we think it is
1108 rc
= dtSearch(new_dir
, &new_dname
, &ino
, &btstack
, JFS_LOOKUP
);
1110 if ((new_ip
== 0) || (ino
!= new_ip
->i_ino
)) {
1114 } else if (rc
!= -ENOENT
)
1117 /* no entry exists, but one was expected */
1122 if (S_ISDIR(old_ip
->i_mode
)) {
1124 if (!dtEmpty(new_ip
)) {
1128 } else if ((new_dir
!= old_dir
) &&
1129 (new_dir
->i_nlink
== JFS_LINK_MAX
)) {
1133 } else if (new_ip
) {
1134 IWRITE_LOCK(new_ip
);
1135 /* Init inode for quota operations. */
1140 * The real work starts here
1142 tid
= txBegin(new_dir
->i_sb
, 0);
1144 mutex_lock(&JFS_IP(new_dir
)->commit_mutex
);
1145 mutex_lock(&JFS_IP(old_ip
)->commit_mutex
);
1146 if (old_dir
!= new_dir
)
1147 mutex_lock(&JFS_IP(old_dir
)->commit_mutex
);
1150 mutex_lock(&JFS_IP(new_ip
)->commit_mutex
);
1152 * Change existing directory entry to new inode number
1154 ino
= new_ip
->i_ino
;
1155 rc
= dtModify(tid
, new_dir
, &new_dname
, &ino
,
1156 old_ip
->i_ino
, JFS_RENAME
);
1160 if (S_ISDIR(new_ip
->i_mode
)) {
1162 if (new_ip
->i_nlink
) {
1163 mutex_unlock(&JFS_IP(new_dir
)->commit_mutex
);
1164 mutex_unlock(&JFS_IP(old_ip
)->commit_mutex
);
1165 if (old_dir
!= new_dir
)
1166 mutex_unlock(&JFS_IP(old_dir
)->commit_mutex
);
1167 if (!S_ISDIR(old_ip
->i_mode
) && new_ip
)
1168 IWRITE_UNLOCK(new_ip
);
1169 jfs_error(new_ip
->i_sb
,
1170 "jfs_rename: new_ip->i_nlink != 0");
1173 tblk
= tid_to_tblock(tid
);
1174 tblk
->xflag
|= COMMIT_DELETE
;
1175 tblk
->u
.ip
= new_ip
;
1176 } else if (new_ip
->i_nlink
== 0) {
1177 assert(!test_cflag(COMMIT_Nolink
, new_ip
));
1178 /* free block resources */
1179 if ((new_size
= commitZeroLink(tid
, new_ip
)) < 0) {
1180 txAbort(tid
, 1); /* Marks FS Dirty */
1184 tblk
= tid_to_tblock(tid
);
1185 tblk
->xflag
|= COMMIT_DELETE
;
1186 tblk
->u
.ip
= new_ip
;
1188 new_ip
->i_ctime
= CURRENT_TIME
;
1189 mark_inode_dirty(new_ip
);
1193 * Add new directory entry
1195 rc
= dtSearch(new_dir
, &new_dname
, &ino
, &btstack
,
1198 jfs_err("jfs_rename didn't expect dtSearch to fail "
1203 ino
= old_ip
->i_ino
;
1204 rc
= dtInsert(tid
, new_dir
, &new_dname
, &ino
, &btstack
);
1207 jfs_err("jfs_rename: dtInsert returned -EIO");
1210 if (S_ISDIR(old_ip
->i_mode
))
1214 * Remove old directory entry
1217 ino
= old_ip
->i_ino
;
1218 rc
= dtDelete(tid
, old_dir
, &old_dname
, &ino
, JFS_REMOVE
);
1220 jfs_err("jfs_rename did not expect dtDelete to return rc = %d",
1222 txAbort(tid
, 1); /* Marks Filesystem dirty */
1225 if (S_ISDIR(old_ip
->i_mode
)) {
1227 if (old_dir
!= new_dir
) {
1229 * Change inode number of parent for moved directory
1232 JFS_IP(old_ip
)->i_dtroot
.header
.idotdot
=
1233 cpu_to_le32(new_dir
->i_ino
);
1235 /* Linelock header of dtree */
1236 tlck
= txLock(tid
, old_ip
,
1237 (struct metapage
*) &JFS_IP(old_ip
)->bxflag
,
1238 tlckDTREE
| tlckBTROOT
| tlckRELINK
);
1239 dtlck
= (struct dt_lock
*) & tlck
->lock
;
1240 ASSERT(dtlck
->index
== 0);
1241 lv
= & dtlck
->lv
[0];
1249 * Update ctime on changed/moved inodes & mark dirty
1251 old_ip
->i_ctime
= CURRENT_TIME
;
1252 mark_inode_dirty(old_ip
);
1254 new_dir
->i_ctime
= new_dir
->i_mtime
= current_fs_time(new_dir
->i_sb
);
1255 mark_inode_dirty(new_dir
);
1257 /* Build list of inodes modified by this transaction */
1259 iplist
[ipcount
++] = old_ip
;
1261 iplist
[ipcount
++] = new_ip
;
1262 iplist
[ipcount
++] = old_dir
;
1264 if (old_dir
!= new_dir
) {
1265 iplist
[ipcount
++] = new_dir
;
1266 old_dir
->i_ctime
= old_dir
->i_mtime
= CURRENT_TIME
;
1267 mark_inode_dirty(old_dir
);
1271 * Incomplete truncate of file data can
1272 * result in timing problems unless we synchronously commit the
1276 commit_flag
= COMMIT_SYNC
;
1280 rc
= txCommit(tid
, ipcount
, iplist
, commit_flag
);
1285 mutex_unlock(&JFS_IP(new_dir
)->commit_mutex
);
1286 mutex_unlock(&JFS_IP(old_ip
)->commit_mutex
);
1287 if (old_dir
!= new_dir
)
1288 mutex_unlock(&JFS_IP(old_dir
)->commit_mutex
);
1290 mutex_unlock(&JFS_IP(new_ip
)->commit_mutex
);
1292 while (new_size
&& (rc
== 0)) {
1293 tid
= txBegin(new_ip
->i_sb
, 0);
1294 mutex_lock(&JFS_IP(new_ip
)->commit_mutex
);
1295 new_size
= xtTruncate_pmap(tid
, new_ip
, new_size
);
1300 rc
= txCommit(tid
, 1, &new_ip
, COMMIT_SYNC
);
1302 mutex_unlock(&JFS_IP(new_ip
)->commit_mutex
);
1304 if (new_ip
&& (new_ip
->i_nlink
== 0))
1305 set_cflag(COMMIT_Nolink
, new_ip
);
1307 free_UCSname(&new_dname
);
1309 free_UCSname(&old_dname
);
1311 if (new_ip
&& !S_ISDIR(new_ip
->i_mode
))
1312 IWRITE_UNLOCK(new_ip
);
1314 * Truncating the directory index table is not guaranteed. It
1315 * may need to be done iteratively
1317 if (test_cflag(COMMIT_Stale
, old_dir
)) {
1318 if (old_dir
->i_size
> 1)
1319 jfs_truncate_nolock(old_dir
, 0);
1321 clear_cflag(COMMIT_Stale
, old_dir
);
1324 jfs_info("jfs_rename: returning %d", rc
);
1332 * FUNCTION: Create a special file (device)
1334 static int jfs_mknod(struct inode
*dir
, struct dentry
*dentry
,
1335 int mode
, dev_t rdev
)
1337 struct jfs_inode_info
*jfs_ip
;
1338 struct btstack btstack
;
1339 struct component_name dname
;
1342 struct inode
*iplist
[2];
1345 struct tblock
*tblk
;
1347 if (!new_valid_dev(rdev
))
1350 jfs_info("jfs_mknod: %s", dentry
->d_name
.name
);
1352 if ((rc
= get_UCSname(&dname
, dentry
)))
1355 ip
= ialloc(dir
, mode
);
1360 jfs_ip
= JFS_IP(ip
);
1362 tid
= txBegin(dir
->i_sb
, 0);
1364 mutex_lock(&JFS_IP(dir
)->commit_mutex
);
1365 mutex_lock(&JFS_IP(ip
)->commit_mutex
);
1367 rc
= jfs_init_acl(tid
, ip
, dir
);
1371 rc
= jfs_init_security(tid
, ip
, dir
);
1377 if ((rc
= dtSearch(dir
, &dname
, &ino
, &btstack
, JFS_CREATE
))) {
1382 tblk
= tid_to_tblock(tid
);
1383 tblk
->xflag
|= COMMIT_CREATE
;
1384 tblk
->ino
= ip
->i_ino
;
1385 tblk
->u
.ixpxd
= JFS_IP(ip
)->ixpxd
;
1388 if ((rc
= dtInsert(tid
, dir
, &dname
, &ino
, &btstack
))) {
1393 ip
->i_op
= &jfs_file_inode_operations
;
1394 jfs_ip
->dev
= new_encode_dev(rdev
);
1395 init_special_inode(ip
, ip
->i_mode
, rdev
);
1397 insert_inode_hash(ip
);
1398 mark_inode_dirty(ip
);
1400 dir
->i_ctime
= dir
->i_mtime
= CURRENT_TIME
;
1402 mark_inode_dirty(dir
);
1406 rc
= txCommit(tid
, 2, iplist
, 0);
1410 mutex_unlock(&JFS_IP(ip
)->commit_mutex
);
1411 mutex_unlock(&JFS_IP(dir
)->commit_mutex
);
1417 d_instantiate(dentry
, ip
);
1420 free_UCSname(&dname
);
1423 jfs_info("jfs_mknod: returning %d", rc
);
1427 static struct dentry
*jfs_lookup(struct inode
*dip
, struct dentry
*dentry
, struct nameidata
*nd
)
1429 struct btstack btstack
;
1432 struct component_name key
;
1433 const char *name
= dentry
->d_name
.name
;
1434 int len
= dentry
->d_name
.len
;
1437 jfs_info("jfs_lookup: name = %s", name
);
1439 if (JFS_SBI(dip
->i_sb
)->mntflag
& JFS_OS2
)
1440 dentry
->d_op
= &jfs_ci_dentry_operations
;
1442 if ((name
[0] == '.') && (len
== 1))
1444 else if (strcmp(name
, "..") == 0)
1447 if ((rc
= get_UCSname(&key
, dentry
)))
1449 rc
= dtSearch(dip
, &key
, &inum
, &btstack
, JFS_LOOKUP
);
1451 if (rc
== -ENOENT
) {
1452 d_add(dentry
, NULL
);
1455 jfs_err("jfs_lookup: dtSearch returned %d", rc
);
1460 ip
= iget(dip
->i_sb
, inum
);
1461 if (ip
== NULL
|| is_bad_inode(ip
)) {
1462 jfs_err("jfs_lookup: iget failed on inum %d", (uint
) inum
);
1465 return ERR_PTR(-EACCES
);
1468 dentry
= d_splice_alias(ip
, dentry
);
1470 if (dentry
&& (JFS_SBI(dip
->i_sb
)->mntflag
& JFS_OS2
))
1471 dentry
->d_op
= &jfs_ci_dentry_operations
;
1476 struct dentry
*jfs_get_parent(struct dentry
*dentry
)
1478 struct super_block
*sb
= dentry
->d_inode
->i_sb
;
1479 struct dentry
*parent
= ERR_PTR(-ENOENT
);
1480 struct inode
*inode
;
1481 unsigned long parent_ino
;
1484 le32_to_cpu(JFS_IP(dentry
->d_inode
)->i_dtroot
.header
.idotdot
);
1485 inode
= iget(sb
, parent_ino
);
1487 if (is_bad_inode(inode
)) {
1489 parent
= ERR_PTR(-EACCES
);
1491 parent
= d_alloc_anon(inode
);
1493 parent
= ERR_PTR(-ENOMEM
);
1502 struct inode_operations jfs_dir_inode_operations
= {
1503 .create
= jfs_create
,
1504 .lookup
= jfs_lookup
,
1506 .unlink
= jfs_unlink
,
1507 .symlink
= jfs_symlink
,
1511 .rename
= jfs_rename
,
1512 .setxattr
= jfs_setxattr
,
1513 .getxattr
= jfs_getxattr
,
1514 .listxattr
= jfs_listxattr
,
1515 .removexattr
= jfs_removexattr
,
1516 #ifdef CONFIG_JFS_POSIX_ACL
1517 .setattr
= jfs_setattr
,
1518 .permission
= jfs_permission
,
1522 struct file_operations jfs_dir_operations
= {
1523 .read
= generic_read_dir
,
1524 .readdir
= jfs_readdir
,
1528 static int jfs_ci_hash(struct dentry
*dir
, struct qstr
*this)
1533 hash
= init_name_hash();
1534 for (i
=0; i
< this->len
; i
++)
1535 hash
= partial_name_hash(tolower(this->name
[i
]), hash
);
1536 this->hash
= end_name_hash(hash
);
1541 static int jfs_ci_compare(struct dentry
*dir
, struct qstr
*a
, struct qstr
*b
)
1545 if (a
->len
!= b
->len
)
1547 for (i
=0; i
< a
->len
; i
++) {
1548 if (tolower(a
->name
[i
]) != tolower(b
->name
[i
]))
1554 * We want creates to preserve case. A negative dentry, a, that
1555 * has a different case than b may cause a new entry to be created
1556 * with the wrong case. Since we can't tell if a comes from a negative
1557 * dentry, we blindly replace it with b. This should be harmless if
1558 * a is not a negative dentry.
1560 memcpy((unsigned char *)a
->name
, b
->name
, a
->len
);
1565 struct dentry_operations jfs_ci_dentry_operations
=
1567 .d_hash
= jfs_ci_hash
,
1568 .d_compare
= jfs_ci_compare
,