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 down(&JFS_IP(dip
)->commit_sem
);
108 down(&JFS_IP(ip
)->commit_sem
);
110 rc
= jfs_init_acl(tid
, ip
, dip
);
114 if ((rc
= dtSearch(dip
, &dname
, &ino
, &btstack
, JFS_CREATE
))) {
115 jfs_err("jfs_create: dtSearch returned %d", rc
);
120 tblk
= tid_to_tblock(tid
);
121 tblk
->xflag
|= COMMIT_CREATE
;
122 tblk
->ino
= ip
->i_ino
;
123 tblk
->u
.ixpxd
= JFS_IP(ip
)->ixpxd
;
129 * initialize the child XAD tree root in-line in inode
134 * create entry in parent directory for child directory
135 * (dtInsert() releases parent directory page)
138 if ((rc
= dtInsert(tid
, dip
, &dname
, &ino
, &btstack
))) {
140 jfs_err("jfs_create: dtInsert returned -EIO");
141 txAbort(tid
, 1); /* Marks Filesystem dirty */
143 txAbort(tid
, 0); /* Filesystem full */
147 ip
->i_op
= &jfs_file_inode_operations
;
148 ip
->i_fop
= &jfs_file_operations
;
149 ip
->i_mapping
->a_ops
= &jfs_aops
;
151 insert_inode_hash(ip
);
152 mark_inode_dirty(ip
);
154 dip
->i_ctime
= dip
->i_mtime
= CURRENT_TIME
;
156 mark_inode_dirty(dip
);
158 rc
= txCommit(tid
, 2, &iplist
[0], 0);
162 up(&JFS_IP(dip
)->commit_sem
);
163 up(&JFS_IP(ip
)->commit_sem
);
169 d_instantiate(dentry
, ip
);
172 free_UCSname(&dname
);
176 jfs_info("jfs_create: rc:%d", rc
);
182 * NAME: jfs_mkdir(dip, dentry, mode)
184 * FUNCTION: create a child directory in the parent directory <dip>
185 * with name = <from dentry> and mode = <mode>
187 * PARAMETER: dip - parent directory vnode
188 * dentry - dentry of child directory
189 * mode - create mode (rwxrwxrwx).
191 * RETURN: Errors from subroutines
194 * EACCESS: user needs search+write permission on the parent directory
196 static int jfs_mkdir(struct inode
*dip
, struct dentry
*dentry
, int mode
)
199 tid_t tid
; /* transaction id */
200 struct inode
*ip
= NULL
; /* child directory inode */
202 struct component_name dname
; /* child directory name */
203 struct btstack btstack
;
204 struct inode
*iplist
[2];
207 jfs_info("jfs_mkdir: dip:0x%p name:%s", dip
, dentry
->d_name
.name
);
209 /* link count overflow on parent directory ? */
210 if (dip
->i_nlink
== JFS_LINK_MAX
) {
216 * search parent directory for entry/freespace
217 * (dtSearch() returns parent directory page pinned)
219 if ((rc
= get_UCSname(&dname
, dentry
)))
223 * Either iAlloc() or txBegin() may block. Deadlock can occur if we
224 * block there while holding dtree page, so we allocate the inode &
225 * begin the transaction before we search the directory.
227 ip
= ialloc(dip
, S_IFDIR
| mode
);
233 tid
= txBegin(dip
->i_sb
, 0);
235 down(&JFS_IP(dip
)->commit_sem
);
236 down(&JFS_IP(ip
)->commit_sem
);
238 rc
= jfs_init_acl(tid
, ip
, dip
);
242 if ((rc
= dtSearch(dip
, &dname
, &ino
, &btstack
, JFS_CREATE
))) {
243 jfs_err("jfs_mkdir: dtSearch returned %d", rc
);
248 tblk
= tid_to_tblock(tid
);
249 tblk
->xflag
|= COMMIT_CREATE
;
250 tblk
->ino
= ip
->i_ino
;
251 tblk
->u
.ixpxd
= JFS_IP(ip
)->ixpxd
;
257 * initialize the child directory in-line in inode
259 dtInitRoot(tid
, ip
, dip
->i_ino
);
262 * create entry in parent directory for child directory
263 * (dtInsert() releases parent directory page)
266 if ((rc
= dtInsert(tid
, dip
, &dname
, &ino
, &btstack
))) {
268 jfs_err("jfs_mkdir: dtInsert returned -EIO");
269 txAbort(tid
, 1); /* Marks Filesystem dirty */
271 txAbort(tid
, 0); /* Filesystem full */
275 ip
->i_nlink
= 2; /* for '.' */
276 ip
->i_op
= &jfs_dir_inode_operations
;
277 ip
->i_fop
= &jfs_dir_operations
;
279 insert_inode_hash(ip
);
280 mark_inode_dirty(ip
);
282 /* update parent directory inode */
283 dip
->i_nlink
++; /* for '..' from child directory */
284 dip
->i_ctime
= dip
->i_mtime
= CURRENT_TIME
;
285 mark_inode_dirty(dip
);
287 rc
= txCommit(tid
, 2, &iplist
[0], 0);
291 up(&JFS_IP(dip
)->commit_sem
);
292 up(&JFS_IP(ip
)->commit_sem
);
298 d_instantiate(dentry
, ip
);
301 free_UCSname(&dname
);
306 jfs_info("jfs_mkdir: rc:%d", rc
);
311 * NAME: jfs_rmdir(dip, dentry)
313 * FUNCTION: remove a link to child directory
315 * PARAMETER: dip - parent inode
316 * dentry - child directory dentry
318 * RETURN: -EINVAL - if name is . or ..
319 * -EINVAL - if . or .. exist but are invalid.
320 * errors from subroutines
323 * if other threads have the directory open when the last link
324 * is removed, the "." and ".." entries, if present, are removed before
325 * rmdir() returns and no new entries may be created in the directory,
326 * but the directory is not removed until the last reference to
327 * the directory is released (cf.unlink() of regular file).
329 static int jfs_rmdir(struct inode
*dip
, struct dentry
*dentry
)
332 tid_t tid
; /* transaction id */
333 struct inode
*ip
= dentry
->d_inode
;
335 struct component_name dname
;
336 struct inode
*iplist
[2];
339 jfs_info("jfs_rmdir: dip:0x%p name:%s", dip
, dentry
->d_name
.name
);
341 /* Init inode for quota operations. */
344 /* directory must be empty to be removed */
350 if ((rc
= get_UCSname(&dname
, dentry
))) {
354 tid
= txBegin(dip
->i_sb
, 0);
356 down(&JFS_IP(dip
)->commit_sem
);
357 down(&JFS_IP(ip
)->commit_sem
);
362 tblk
= tid_to_tblock(tid
);
363 tblk
->xflag
|= COMMIT_DELETE
;
367 * delete the entry of target directory from parent directory
370 if ((rc
= dtDelete(tid
, dip
, &dname
, &ino
, JFS_REMOVE
))) {
371 jfs_err("jfs_rmdir: dtDelete returned %d", rc
);
375 up(&JFS_IP(dip
)->commit_sem
);
376 up(&JFS_IP(ip
)->commit_sem
);
381 /* update parent directory's link count corresponding
382 * to ".." entry of the target directory deleted
385 dip
->i_ctime
= dip
->i_mtime
= CURRENT_TIME
;
386 mark_inode_dirty(dip
);
389 * OS/2 could have created EA and/or ACL
391 /* free EA from both persistent and working map */
392 if (JFS_IP(ip
)->ea
.flag
& DXD_EXTENT
) {
394 txEA(tid
, ip
, &JFS_IP(ip
)->ea
, NULL
);
396 JFS_IP(ip
)->ea
.flag
= 0;
398 /* free ACL from both persistent and working map */
399 if (JFS_IP(ip
)->acl
.flag
& DXD_EXTENT
) {
401 txEA(tid
, ip
, &JFS_IP(ip
)->acl
, NULL
);
403 JFS_IP(ip
)->acl
.flag
= 0;
405 /* mark the target directory as deleted */
407 mark_inode_dirty(ip
);
409 rc
= txCommit(tid
, 2, &iplist
[0], 0);
413 up(&JFS_IP(dip
)->commit_sem
);
414 up(&JFS_IP(ip
)->commit_sem
);
417 * Truncating the directory index table is not guaranteed. It
418 * may need to be done iteratively
420 if (test_cflag(COMMIT_Stale
, dip
)) {
422 jfs_truncate_nolock(dip
, 0);
424 clear_cflag(COMMIT_Stale
, dip
);
428 free_UCSname(&dname
);
431 jfs_info("jfs_rmdir: rc:%d", rc
);
436 * NAME: jfs_unlink(dip, dentry)
438 * FUNCTION: remove a link to object <vp> named by <name>
439 * from parent directory <dvp>
441 * PARAMETER: dip - inode of parent directory
442 * dentry - dentry of object to be removed
444 * RETURN: errors from subroutines
447 * temporary file: if one or more processes have the file open
448 * when the last link is removed, the link will be removed before
449 * unlink() returns, but the removal of the file contents will be
450 * postponed until all references to the files are closed.
452 * JFS does NOT support unlink() on directories.
455 static int jfs_unlink(struct inode
*dip
, struct dentry
*dentry
)
458 tid_t tid
; /* transaction id */
459 struct inode
*ip
= dentry
->d_inode
;
461 struct component_name dname
; /* object name */
462 struct inode
*iplist
[2];
467 jfs_info("jfs_unlink: dip:0x%p name:%s", dip
, dentry
->d_name
.name
);
469 /* Init inode for quota operations. */
472 if ((rc
= get_UCSname(&dname
, dentry
)))
477 tid
= txBegin(dip
->i_sb
, 0);
479 down(&JFS_IP(dip
)->commit_sem
);
480 down(&JFS_IP(ip
)->commit_sem
);
486 * delete the entry of target file from parent directory
489 if ((rc
= dtDelete(tid
, dip
, &dname
, &ino
, JFS_REMOVE
))) {
490 jfs_err("jfs_unlink: dtDelete returned %d", rc
);
492 txAbort(tid
, 1); /* Marks FS Dirty */
494 up(&JFS_IP(dip
)->commit_sem
);
495 up(&JFS_IP(ip
)->commit_sem
);
502 ip
->i_ctime
= dip
->i_ctime
= dip
->i_mtime
= CURRENT_TIME
;
503 mark_inode_dirty(dip
);
505 /* update target's inode */
507 mark_inode_dirty(ip
);
510 * commit zero link count object
512 if (ip
->i_nlink
== 0) {
513 assert(!test_cflag(COMMIT_Nolink
, ip
));
514 /* free block resources */
515 if ((new_size
= commitZeroLink(tid
, ip
)) < 0) {
516 txAbort(tid
, 1); /* Marks FS Dirty */
518 up(&JFS_IP(dip
)->commit_sem
);
519 up(&JFS_IP(ip
)->commit_sem
);
524 tblk
= tid_to_tblock(tid
);
525 tblk
->xflag
|= COMMIT_DELETE
;
530 * Incomplete truncate of file data can
531 * result in timing problems unless we synchronously commit the
535 commit_flag
= COMMIT_SYNC
;
540 * If xtTruncate was incomplete, commit synchronously to avoid
541 * timing complications
543 rc
= txCommit(tid
, 2, &iplist
[0], commit_flag
);
547 up(&JFS_IP(dip
)->commit_sem
);
548 up(&JFS_IP(ip
)->commit_sem
);
551 while (new_size
&& (rc
== 0)) {
552 tid
= txBegin(dip
->i_sb
, 0);
553 down(&JFS_IP(ip
)->commit_sem
);
554 new_size
= xtTruncate_pmap(tid
, ip
, new_size
);
556 txAbort(tid
, 1); /* Marks FS Dirty */
559 rc
= txCommit(tid
, 2, &iplist
[0], COMMIT_SYNC
);
561 up(&JFS_IP(ip
)->commit_sem
);
564 if (ip
->i_nlink
== 0)
565 set_cflag(COMMIT_Nolink
, ip
);
570 * Truncating the directory index table is not guaranteed. It
571 * may need to be done iteratively
573 if (test_cflag(COMMIT_Stale
, dip
)) {
575 jfs_truncate_nolock(dip
, 0);
577 clear_cflag(COMMIT_Stale
, dip
);
581 free_UCSname(&dname
);
583 jfs_info("jfs_unlink: rc:%d", rc
);
588 * NAME: commitZeroLink()
590 * FUNCTION: for non-directory, called by jfs_remove(),
591 * truncate a regular file, directory or symbolic
592 * link to zero length. return 0 if type is not
595 * if the file is currently associated with a VM segment
596 * only permanent disk and inode map resources are freed,
597 * and neither the inode nor indirect blocks are modified
598 * so that the resources can be later freed in the work
600 * if there is no VM segment on entry, the resources are
601 * freed in both work and permanent map.
602 * (? for temporary file - memory object is cached even
603 * after no reference:
604 * reference count > 0 - )
606 * PARAMETERS: cd - pointer to commit data structure.
607 * current inode is the one to truncate.
609 * RETURN: Errors from subroutines
611 static s64
commitZeroLink(tid_t tid
, struct inode
*ip
)
616 jfs_info("commitZeroLink: tid = %d, ip = 0x%p", tid
, ip
);
618 filetype
= ip
->i_mode
& S_IFMT
;
623 /* fast symbolic link */
624 if (ip
->i_size
< IDATASIZE
) {
630 assert(filetype
!= S_IFDIR
);
634 set_cflag(COMMIT_Freewmap
, ip
);
636 /* mark transaction of block map update type */
637 tblk
= tid_to_tblock(tid
);
638 tblk
->xflag
|= COMMIT_PMAP
;
643 if (JFS_IP(ip
)->ea
.flag
& DXD_EXTENT
)
644 /* acquire maplock on EA to be freed from block map */
645 txEA(tid
, ip
, &JFS_IP(ip
)->ea
, NULL
);
650 if (JFS_IP(ip
)->acl
.flag
& DXD_EXTENT
)
651 /* acquire maplock on EA to be freed from block map */
652 txEA(tid
, ip
, &JFS_IP(ip
)->acl
, NULL
);
655 * free xtree/data (truncate to zero length):
656 * free xtree/data pages from cache if COMMIT_PWMAP,
657 * free xtree/data blocks from persistent block map, and
658 * free xtree/data blocks from working block map if COMMIT_PWMAP;
661 return xtTruncate_pmap(tid
, ip
, 0);
668 * NAME: jfs_free_zero_link()
670 * FUNCTION: for non-directory, called by iClose(),
671 * free resources of a file from cache and WORKING map
672 * for a file previously committed with zero link count
673 * while associated with a pager object,
675 * PARAMETER: ip - pointer to inode of file.
677 void jfs_free_zero_link(struct inode
*ip
)
681 jfs_info("jfs_free_zero_link: ip = 0x%p", ip
);
683 /* return if not reg or symbolic link or if size is
686 type
= ip
->i_mode
& S_IFMT
;
692 /* if its contained in inode nothing to do */
693 if (ip
->i_size
< IDATASIZE
)
703 if (JFS_IP(ip
)->ea
.flag
& DXD_EXTENT
) {
704 s64 xaddr
= addressDXD(&JFS_IP(ip
)->ea
);
705 int xlen
= lengthDXD(&JFS_IP(ip
)->ea
);
706 struct maplock maplock
; /* maplock for COMMIT_WMAP */
707 struct pxd_lock
*pxdlock
; /* maplock for COMMIT_WMAP */
709 /* free EA pages from cache */
710 invalidate_dxd_metapages(ip
, JFS_IP(ip
)->ea
);
712 /* free EA extent from working block map */
714 pxdlock
= (struct pxd_lock
*) & maplock
;
715 pxdlock
->flag
= mlckFREEPXD
;
716 PXDaddress(&pxdlock
->pxd
, xaddr
);
717 PXDlength(&pxdlock
->pxd
, xlen
);
718 txFreeMap(ip
, pxdlock
, NULL
, COMMIT_WMAP
);
724 if (JFS_IP(ip
)->acl
.flag
& DXD_EXTENT
) {
725 s64 xaddr
= addressDXD(&JFS_IP(ip
)->acl
);
726 int xlen
= lengthDXD(&JFS_IP(ip
)->acl
);
727 struct maplock maplock
; /* maplock for COMMIT_WMAP */
728 struct pxd_lock
*pxdlock
; /* maplock for COMMIT_WMAP */
730 invalidate_dxd_metapages(ip
, JFS_IP(ip
)->acl
);
732 /* free ACL extent from working block map */
734 pxdlock
= (struct pxd_lock
*) & maplock
;
735 pxdlock
->flag
= mlckFREEPXD
;
736 PXDaddress(&pxdlock
->pxd
, xaddr
);
737 PXDlength(&pxdlock
->pxd
, xlen
);
738 txFreeMap(ip
, pxdlock
, NULL
, COMMIT_WMAP
);
742 * free xtree/data (truncate to zero length):
743 * free xtree/data pages from cache, and
744 * free xtree/data blocks from working block map;
747 xtTruncate(0, ip
, 0, COMMIT_WMAP
);
751 * NAME: jfs_link(vp, dvp, name, crp)
753 * FUNCTION: create a link to <vp> by the name = <name>
754 * in the parent directory <dvp>
756 * PARAMETER: vp - target object
757 * dvp - parent directory of new link
758 * name - name of new link to target object
761 * RETURN: Errors from subroutines
764 * JFS does NOT support link() on directories (to prevent circular
765 * path in the directory hierarchy);
766 * EPERM: the target object is a directory, and either the caller
767 * does not have appropriate privileges or the implementation prohibits
768 * using link() on directories [XPG4.2].
770 * JFS does NOT support links between file systems:
771 * EXDEV: target object and new link are on different file systems and
772 * implementation does not support links between file systems [XPG4.2].
774 static int jfs_link(struct dentry
*old_dentry
,
775 struct inode
*dir
, struct dentry
*dentry
)
779 struct inode
*ip
= old_dentry
->d_inode
;
781 struct component_name dname
;
782 struct btstack btstack
;
783 struct inode
*iplist
[2];
785 jfs_info("jfs_link: %s %s", old_dentry
->d_name
.name
,
786 dentry
->d_name
.name
);
788 if (ip
->i_nlink
== JFS_LINK_MAX
)
791 if (ip
->i_nlink
== 0)
794 tid
= txBegin(ip
->i_sb
, 0);
796 down(&JFS_IP(dir
)->commit_sem
);
797 down(&JFS_IP(ip
)->commit_sem
);
800 * scan parent directory for entry/freespace
802 if ((rc
= get_UCSname(&dname
, dentry
)))
805 if ((rc
= dtSearch(dir
, &dname
, &ino
, &btstack
, JFS_CREATE
)))
809 * create entry for new link in parent directory
812 if ((rc
= dtInsert(tid
, dir
, &dname
, &ino
, &btstack
)))
815 /* update object inode */
816 ip
->i_nlink
++; /* for new link */
817 ip
->i_ctime
= CURRENT_TIME
;
818 mark_inode_dirty(dir
);
819 atomic_inc(&ip
->i_count
);
823 rc
= txCommit(tid
, 2, &iplist
[0], 0);
829 d_instantiate(dentry
, ip
);
832 free_UCSname(&dname
);
837 up(&JFS_IP(dir
)->commit_sem
);
838 up(&JFS_IP(ip
)->commit_sem
);
840 jfs_info("jfs_link: rc:%d", rc
);
845 * NAME: jfs_symlink(dip, dentry, name)
847 * FUNCTION: creates a symbolic link to <symlink> by name <name>
850 * PARAMETER: dip - parent directory vnode
851 * dentry - dentry of symbolic link
852 * name - the path name of the existing object
853 * that will be the source of the link
855 * RETURN: errors from subroutines
858 * ENAMETOOLONG: pathname resolution of a symbolic link produced
859 * an intermediate result whose length exceeds PATH_MAX [XPG4.2]
862 static int jfs_symlink(struct inode
*dip
, struct dentry
*dentry
,
868 struct component_name dname
;
869 int ssize
; /* source pathname size */
870 struct btstack btstack
;
871 struct inode
*ip
= dentry
->d_inode
;
872 unchar
*i_fastsymlink
;
874 int bmask
= 0, xsize
;
875 s64 extent
= 0, xaddr
;
877 struct super_block
*sb
;
880 struct inode
*iplist
[2];
882 jfs_info("jfs_symlink: dip:0x%p name:%s", dip
, name
);
884 ssize
= strlen(name
) + 1;
887 * search parent directory for entry/freespace
888 * (dtSearch() returns parent directory page pinned)
891 if ((rc
= get_UCSname(&dname
, dentry
)))
895 * allocate on-disk/in-memory inode for symbolic link:
896 * (iAlloc() returns new, locked inode)
898 ip
= ialloc(dip
, S_IFLNK
| 0777);
904 tid
= txBegin(dip
->i_sb
, 0);
906 down(&JFS_IP(dip
)->commit_sem
);
907 down(&JFS_IP(ip
)->commit_sem
);
909 tblk
= tid_to_tblock(tid
);
910 tblk
->xflag
|= COMMIT_CREATE
;
911 tblk
->ino
= ip
->i_ino
;
912 tblk
->u
.ixpxd
= JFS_IP(ip
)->ixpxd
;
914 /* fix symlink access permission
915 * (dir_create() ANDs in the u.u_cmask,
916 * but symlinks really need to be 777 access)
921 * write symbolic link target path name
926 * write source path name inline in on-disk inode (fast symbolic link)
929 if (ssize
<= IDATASIZE
) {
930 ip
->i_op
= &jfs_symlink_inode_operations
;
932 i_fastsymlink
= JFS_IP(ip
)->i_inline
;
933 memcpy(i_fastsymlink
, name
, ssize
);
934 ip
->i_size
= ssize
- 1;
937 * if symlink is > 128 bytes, we don't have the space to
938 * store inline extended attributes
940 if (ssize
> sizeof (JFS_IP(ip
)->i_inline
))
941 JFS_IP(ip
)->mode2
&= ~INLINEEA
;
943 jfs_info("jfs_symlink: fast symlink added ssize:%d name:%s ",
947 * write source path name in a single extent
950 jfs_info("jfs_symlink: allocate extent ip:0x%p", ip
);
952 ip
->i_op
= &page_symlink_inode_operations
;
953 ip
->i_mapping
->a_ops
= &jfs_aops
;
956 * even though the data of symlink object (source
957 * path name) is treated as non-journaled user data,
958 * it is read/written thru buffer cache for performance.
961 bmask
= JFS_SBI(sb
)->bsize
- 1;
962 xsize
= (ssize
+ bmask
) & ~bmask
;
964 xlen
= xsize
>> JFS_SBI(sb
)->l2bsize
;
965 if ((rc
= xtInsert(tid
, ip
, 0, 0, xlen
, &xaddr
, 0))) {
971 ip
->i_size
= ssize
- 1;
973 /* This is kind of silly since PATH_MAX == 4K */
974 int copy_size
= min(ssize
, PSIZE
);
976 mp
= get_metapage(ip
, xaddr
, PSIZE
, 1);
979 xtTruncate(tid
, ip
, 0, COMMIT_PWMAP
);
984 memcpy(mp
->data
, name
, copy_size
);
988 xaddr
+= JFS_SBI(sb
)->nbperpage
;
993 * create entry for symbolic link in parent directory
995 rc
= dtSearch(dip
, &dname
, &ino
, &btstack
, JFS_CREATE
);
998 rc
= dtInsert(tid
, dip
, &dname
, &ino
, &btstack
);
1002 xtTruncate(tid
, ip
, 0, COMMIT_PWMAP
);
1004 /* discard new inode */
1008 insert_inode_hash(ip
);
1009 mark_inode_dirty(ip
);
1012 * commit update of parent directory and link object
1017 rc
= txCommit(tid
, 2, &iplist
[0], 0);
1021 up(&JFS_IP(dip
)->commit_sem
);
1022 up(&JFS_IP(ip
)->commit_sem
);
1028 d_instantiate(dentry
, ip
);
1031 free_UCSname(&dname
);
1034 jfs_info("jfs_symlink: rc:%d", rc
);
1042 * FUNCTION: rename a file or directory
1044 static int jfs_rename(struct inode
*old_dir
, struct dentry
*old_dentry
,
1045 struct inode
*new_dir
, struct dentry
*new_dentry
)
1047 struct btstack btstack
;
1049 struct component_name new_dname
;
1050 struct inode
*new_ip
;
1051 struct component_name old_dname
;
1052 struct inode
*old_ip
;
1056 struct dt_lock
*dtlck
;
1059 struct inode
*iplist
[4];
1060 struct tblock
*tblk
;
1065 jfs_info("jfs_rename: %s %s", old_dentry
->d_name
.name
,
1066 new_dentry
->d_name
.name
);
1068 old_ip
= old_dentry
->d_inode
;
1069 new_ip
= new_dentry
->d_inode
;
1071 if ((rc
= get_UCSname(&old_dname
, old_dentry
)))
1074 if ((rc
= get_UCSname(&new_dname
, new_dentry
)))
1078 * Make sure source inode number is what we think it is
1080 rc
= dtSearch(old_dir
, &old_dname
, &ino
, &btstack
, JFS_LOOKUP
);
1081 if (rc
|| (ino
!= old_ip
->i_ino
)) {
1087 * Make sure dest inode number (if any) is what we think it is
1089 rc
= dtSearch(new_dir
, &new_dname
, &ino
, &btstack
, JFS_LOOKUP
);
1091 if ((new_ip
== 0) || (ino
!= new_ip
->i_ino
)) {
1095 } else if (rc
!= -ENOENT
)
1098 /* no entry exists, but one was expected */
1103 if (S_ISDIR(old_ip
->i_mode
)) {
1105 if (!dtEmpty(new_ip
)) {
1109 } else if ((new_dir
!= old_dir
) &&
1110 (new_dir
->i_nlink
== JFS_LINK_MAX
)) {
1114 } else if (new_ip
) {
1115 IWRITE_LOCK(new_ip
);
1116 /* Init inode for quota operations. */
1121 * The real work starts here
1123 tid
= txBegin(new_dir
->i_sb
, 0);
1125 down(&JFS_IP(new_dir
)->commit_sem
);
1126 down(&JFS_IP(old_ip
)->commit_sem
);
1127 if (old_dir
!= new_dir
)
1128 down(&JFS_IP(old_dir
)->commit_sem
);
1131 down(&JFS_IP(new_ip
)->commit_sem
);
1133 * Change existing directory entry to new inode number
1135 ino
= new_ip
->i_ino
;
1136 rc
= dtModify(tid
, new_dir
, &new_dname
, &ino
,
1137 old_ip
->i_ino
, JFS_RENAME
);
1141 if (S_ISDIR(new_ip
->i_mode
)) {
1143 if (new_ip
->i_nlink
) {
1144 up(&JFS_IP(new_dir
)->commit_sem
);
1145 up(&JFS_IP(old_ip
)->commit_sem
);
1146 if (old_dir
!= new_dir
)
1147 up(&JFS_IP(old_dir
)->commit_sem
);
1148 if (!S_ISDIR(old_ip
->i_mode
) && new_ip
)
1149 IWRITE_UNLOCK(new_ip
);
1150 jfs_error(new_ip
->i_sb
,
1151 "jfs_rename: new_ip->i_nlink != 0");
1154 tblk
= tid_to_tblock(tid
);
1155 tblk
->xflag
|= COMMIT_DELETE
;
1156 tblk
->u
.ip
= new_ip
;
1157 } else if (new_ip
->i_nlink
== 0) {
1158 assert(!test_cflag(COMMIT_Nolink
, new_ip
));
1159 /* free block resources */
1160 if ((new_size
= commitZeroLink(tid
, new_ip
)) < 0) {
1161 txAbort(tid
, 1); /* Marks FS Dirty */
1165 tblk
= tid_to_tblock(tid
);
1166 tblk
->xflag
|= COMMIT_DELETE
;
1167 tblk
->u
.ip
= new_ip
;
1169 new_ip
->i_ctime
= CURRENT_TIME
;
1170 mark_inode_dirty(new_ip
);
1174 * Add new directory entry
1176 rc
= dtSearch(new_dir
, &new_dname
, &ino
, &btstack
,
1179 jfs_err("jfs_rename didn't expect dtSearch to fail "
1184 ino
= old_ip
->i_ino
;
1185 rc
= dtInsert(tid
, new_dir
, &new_dname
, &ino
, &btstack
);
1188 jfs_err("jfs_rename: dtInsert returned -EIO");
1191 if (S_ISDIR(old_ip
->i_mode
))
1195 * Remove old directory entry
1198 ino
= old_ip
->i_ino
;
1199 rc
= dtDelete(tid
, old_dir
, &old_dname
, &ino
, JFS_REMOVE
);
1201 jfs_err("jfs_rename did not expect dtDelete to return rc = %d",
1203 txAbort(tid
, 1); /* Marks Filesystem dirty */
1206 if (S_ISDIR(old_ip
->i_mode
)) {
1208 if (old_dir
!= new_dir
) {
1210 * Change inode number of parent for moved directory
1213 JFS_IP(old_ip
)->i_dtroot
.header
.idotdot
=
1214 cpu_to_le32(new_dir
->i_ino
);
1216 /* Linelock header of dtree */
1217 tlck
= txLock(tid
, old_ip
,
1218 (struct metapage
*) &JFS_IP(old_ip
)->bxflag
,
1219 tlckDTREE
| tlckBTROOT
| tlckRELINK
);
1220 dtlck
= (struct dt_lock
*) & tlck
->lock
;
1221 ASSERT(dtlck
->index
== 0);
1222 lv
= & dtlck
->lv
[0];
1230 * Update ctime on changed/moved inodes & mark dirty
1232 old_ip
->i_ctime
= CURRENT_TIME
;
1233 mark_inode_dirty(old_ip
);
1235 new_dir
->i_ctime
= new_dir
->i_mtime
= current_fs_time(new_dir
->i_sb
);
1236 mark_inode_dirty(new_dir
);
1238 /* Build list of inodes modified by this transaction */
1240 iplist
[ipcount
++] = old_ip
;
1242 iplist
[ipcount
++] = new_ip
;
1243 iplist
[ipcount
++] = old_dir
;
1245 if (old_dir
!= new_dir
) {
1246 iplist
[ipcount
++] = new_dir
;
1247 old_dir
->i_ctime
= old_dir
->i_mtime
= CURRENT_TIME
;
1248 mark_inode_dirty(old_dir
);
1252 * Incomplete truncate of file data can
1253 * result in timing problems unless we synchronously commit the
1257 commit_flag
= COMMIT_SYNC
;
1261 rc
= txCommit(tid
, ipcount
, iplist
, commit_flag
);
1266 up(&JFS_IP(new_dir
)->commit_sem
);
1267 up(&JFS_IP(old_ip
)->commit_sem
);
1268 if (old_dir
!= new_dir
)
1269 up(&JFS_IP(old_dir
)->commit_sem
);
1271 up(&JFS_IP(new_ip
)->commit_sem
);
1273 while (new_size
&& (rc
== 0)) {
1274 tid
= txBegin(new_ip
->i_sb
, 0);
1275 down(&JFS_IP(new_ip
)->commit_sem
);
1276 new_size
= xtTruncate_pmap(tid
, new_ip
, new_size
);
1281 rc
= txCommit(tid
, 1, &new_ip
, COMMIT_SYNC
);
1283 up(&JFS_IP(new_ip
)->commit_sem
);
1285 if (new_ip
&& (new_ip
->i_nlink
== 0))
1286 set_cflag(COMMIT_Nolink
, new_ip
);
1288 free_UCSname(&new_dname
);
1290 free_UCSname(&old_dname
);
1292 if (new_ip
&& !S_ISDIR(new_ip
->i_mode
))
1293 IWRITE_UNLOCK(new_ip
);
1295 * Truncating the directory index table is not guaranteed. It
1296 * may need to be done iteratively
1298 if (test_cflag(COMMIT_Stale
, old_dir
)) {
1299 if (old_dir
->i_size
> 1)
1300 jfs_truncate_nolock(old_dir
, 0);
1302 clear_cflag(COMMIT_Stale
, old_dir
);
1305 jfs_info("jfs_rename: returning %d", rc
);
1313 * FUNCTION: Create a special file (device)
1315 static int jfs_mknod(struct inode
*dir
, struct dentry
*dentry
,
1316 int mode
, dev_t rdev
)
1318 struct jfs_inode_info
*jfs_ip
;
1319 struct btstack btstack
;
1320 struct component_name dname
;
1323 struct inode
*iplist
[2];
1326 struct tblock
*tblk
;
1328 if (!new_valid_dev(rdev
))
1331 jfs_info("jfs_mknod: %s", dentry
->d_name
.name
);
1333 if ((rc
= get_UCSname(&dname
, dentry
)))
1336 ip
= ialloc(dir
, mode
);
1341 jfs_ip
= JFS_IP(ip
);
1343 tid
= txBegin(dir
->i_sb
, 0);
1345 down(&JFS_IP(dir
)->commit_sem
);
1346 down(&JFS_IP(ip
)->commit_sem
);
1348 rc
= jfs_init_acl(tid
, ip
, dir
);
1352 if ((rc
= dtSearch(dir
, &dname
, &ino
, &btstack
, JFS_CREATE
))) {
1357 tblk
= tid_to_tblock(tid
);
1358 tblk
->xflag
|= COMMIT_CREATE
;
1359 tblk
->ino
= ip
->i_ino
;
1360 tblk
->u
.ixpxd
= JFS_IP(ip
)->ixpxd
;
1363 if ((rc
= dtInsert(tid
, dir
, &dname
, &ino
, &btstack
))) {
1368 ip
->i_op
= &jfs_file_inode_operations
;
1369 jfs_ip
->dev
= new_encode_dev(rdev
);
1370 init_special_inode(ip
, ip
->i_mode
, rdev
);
1372 insert_inode_hash(ip
);
1373 mark_inode_dirty(ip
);
1375 dir
->i_ctime
= dir
->i_mtime
= CURRENT_TIME
;
1377 mark_inode_dirty(dir
);
1381 rc
= txCommit(tid
, 2, iplist
, 0);
1385 up(&JFS_IP(ip
)->commit_sem
);
1386 up(&JFS_IP(dir
)->commit_sem
);
1392 d_instantiate(dentry
, ip
);
1395 free_UCSname(&dname
);
1398 jfs_info("jfs_mknod: returning %d", rc
);
1402 static struct dentry
*jfs_lookup(struct inode
*dip
, struct dentry
*dentry
, struct nameidata
*nd
)
1404 struct btstack btstack
;
1407 struct component_name key
;
1408 const char *name
= dentry
->d_name
.name
;
1409 int len
= dentry
->d_name
.len
;
1412 jfs_info("jfs_lookup: name = %s", name
);
1414 if (JFS_SBI(dip
->i_sb
)->mntflag
& JFS_OS2
)
1415 dentry
->d_op
= &jfs_ci_dentry_operations
;
1417 if ((name
[0] == '.') && (len
== 1))
1419 else if (strcmp(name
, "..") == 0)
1422 if ((rc
= get_UCSname(&key
, dentry
)))
1424 rc
= dtSearch(dip
, &key
, &inum
, &btstack
, JFS_LOOKUP
);
1426 if (rc
== -ENOENT
) {
1427 d_add(dentry
, NULL
);
1430 jfs_err("jfs_lookup: dtSearch returned %d", rc
);
1435 ip
= iget(dip
->i_sb
, inum
);
1436 if (ip
== NULL
|| is_bad_inode(ip
)) {
1437 jfs_err("jfs_lookup: iget failed on inum %d", (uint
) inum
);
1440 return ERR_PTR(-EACCES
);
1443 dentry
= d_splice_alias(ip
, dentry
);
1445 if (dentry
&& (JFS_SBI(dip
->i_sb
)->mntflag
& JFS_OS2
))
1446 dentry
->d_op
= &jfs_ci_dentry_operations
;
1451 struct dentry
*jfs_get_parent(struct dentry
*dentry
)
1453 struct super_block
*sb
= dentry
->d_inode
->i_sb
;
1454 struct dentry
*parent
= ERR_PTR(-ENOENT
);
1455 struct inode
*inode
;
1456 unsigned long parent_ino
;
1459 le32_to_cpu(JFS_IP(dentry
->d_inode
)->i_dtroot
.header
.idotdot
);
1460 inode
= iget(sb
, parent_ino
);
1462 if (is_bad_inode(inode
)) {
1464 parent
= ERR_PTR(-EACCES
);
1466 parent
= d_alloc_anon(inode
);
1468 parent
= ERR_PTR(-ENOMEM
);
1477 struct inode_operations jfs_dir_inode_operations
= {
1478 .create
= jfs_create
,
1479 .lookup
= jfs_lookup
,
1481 .unlink
= jfs_unlink
,
1482 .symlink
= jfs_symlink
,
1486 .rename
= jfs_rename
,
1487 .setxattr
= jfs_setxattr
,
1488 .getxattr
= jfs_getxattr
,
1489 .listxattr
= jfs_listxattr
,
1490 .removexattr
= jfs_removexattr
,
1491 #ifdef CONFIG_JFS_POSIX_ACL
1492 .setattr
= jfs_setattr
,
1493 .permission
= jfs_permission
,
1497 struct file_operations jfs_dir_operations
= {
1498 .read
= generic_read_dir
,
1499 .readdir
= jfs_readdir
,
1503 static int jfs_ci_hash(struct dentry
*dir
, struct qstr
*this)
1508 hash
= init_name_hash();
1509 for (i
=0; i
< this->len
; i
++)
1510 hash
= partial_name_hash(tolower(this->name
[i
]), hash
);
1511 this->hash
= end_name_hash(hash
);
1516 static int jfs_ci_compare(struct dentry
*dir
, struct qstr
*a
, struct qstr
*b
)
1520 if (a
->len
!= b
->len
)
1522 for (i
=0; i
< a
->len
; i
++) {
1523 if (tolower(a
->name
[i
]) != tolower(b
->name
[i
]))
1529 * We want creates to preserve case. A negative dentry, a, that
1530 * has a different case than b may cause a new entry to be created
1531 * with the wrong case. Since we can't tell if a comes from a negative
1532 * dentry, we blindly replace it with b. This should be harmless if
1533 * a is not a negative dentry.
1535 memcpy((unsigned char *)a
->name
, b
->name
, a
->len
);
1540 struct dentry_operations jfs_ci_dentry_operations
=
1542 .d_hash
= jfs_ci_hash
,
1543 .d_compare
= jfs_ci_compare
,