1 // SPDX-License-Identifier: GPL-2.0-or-later
3 * Copyright (C) International Business Machines Corp., 2000-2004
4 * Portions Copyright (C) Christoph Hellwig, 2001-2002
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"
17 #include "jfs_unicode.h"
18 #include "jfs_metapage.h"
19 #include "jfs_xattr.h"
21 #include "jfs_debug.h"
26 const struct dentry_operations jfs_ci_dentry_operations
;
28 static s64
commitZeroLink(tid_t
, struct inode
*);
31 * NAME: free_ea_wmap(inode)
33 * FUNCTION: free uncommitted extended attributes from working map
36 static inline void free_ea_wmap(struct inode
*inode
)
38 dxd_t
*ea
= &JFS_IP(inode
)->ea
;
40 if (ea
->flag
& DXD_EXTENT
) {
41 /* free EA pages from cache */
42 invalidate_dxd_metapages(inode
, *ea
);
43 dbFree(inode
, addressDXD(ea
), lengthDXD(ea
));
49 * NAME: jfs_create(dip, dentry, mode)
51 * FUNCTION: create a regular file in the parent directory <dip>
52 * with name = <from dentry> and mode = <mode>
54 * PARAMETER: dip - parent directory vnode
55 * dentry - dentry of new file
56 * mode - create mode (rwxrwxrwx).
59 * RETURN: Errors from subroutines
62 static int jfs_create(struct user_namespace
*mnt_userns
, struct inode
*dip
,
63 struct dentry
*dentry
, umode_t mode
, bool excl
)
66 tid_t tid
; /* transaction id */
67 struct inode
*ip
= NULL
; /* child directory inode */
69 struct component_name dname
; /* child directory name */
70 struct btstack btstack
;
71 struct inode
*iplist
[2];
74 jfs_info("jfs_create: dip:0x%p name:%pd", dip
, dentry
);
76 rc
= dquot_initialize(dip
);
81 * search parent directory for entry/freespace
82 * (dtSearch() returns parent directory page pinned)
84 if ((rc
= get_UCSname(&dname
, dentry
)))
88 * Either iAlloc() or txBegin() may block. Deadlock can occur if we
89 * block there while holding dtree page, so we allocate the inode &
90 * begin the transaction before we search the directory.
92 ip
= ialloc(dip
, mode
);
98 tid
= txBegin(dip
->i_sb
, 0);
100 mutex_lock_nested(&JFS_IP(dip
)->commit_mutex
, COMMIT_MUTEX_PARENT
);
101 mutex_lock_nested(&JFS_IP(ip
)->commit_mutex
, COMMIT_MUTEX_CHILD
);
103 rc
= jfs_init_acl(tid
, ip
, dip
);
107 rc
= jfs_init_security(tid
, ip
, dip
, &dentry
->d_name
);
113 if ((rc
= dtSearch(dip
, &dname
, &ino
, &btstack
, JFS_CREATE
))) {
114 jfs_err("jfs_create: dtSearch returned %d", rc
);
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
;
128 * initialize the child XAD tree root in-line in inode
133 * create entry in parent directory for child directory
134 * (dtInsert() releases parent directory page)
137 if ((rc
= dtInsert(tid
, dip
, &dname
, &ino
, &btstack
))) {
139 jfs_err("jfs_create: dtInsert returned -EIO");
140 txAbort(tid
, 1); /* Marks Filesystem dirty */
142 txAbort(tid
, 0); /* Filesystem full */
146 ip
->i_op
= &jfs_file_inode_operations
;
147 ip
->i_fop
= &jfs_file_operations
;
148 ip
->i_mapping
->a_ops
= &jfs_aops
;
150 mark_inode_dirty(ip
);
152 dip
->i_ctime
= dip
->i_mtime
= current_time(dip
);
154 mark_inode_dirty(dip
);
156 rc
= txCommit(tid
, 2, &iplist
[0], 0);
160 mutex_unlock(&JFS_IP(ip
)->commit_mutex
);
161 mutex_unlock(&JFS_IP(dip
)->commit_mutex
);
165 discard_new_inode(ip
);
167 d_instantiate_new(dentry
, ip
);
171 free_UCSname(&dname
);
175 jfs_info("jfs_create: rc:%d", rc
);
181 * NAME: jfs_mkdir(dip, dentry, mode)
183 * FUNCTION: create a child directory in the parent directory <dip>
184 * with name = <from dentry> and mode = <mode>
186 * PARAMETER: dip - parent directory vnode
187 * dentry - dentry of child directory
188 * mode - create mode (rwxrwxrwx).
190 * RETURN: Errors from subroutines
193 * EACCES: user needs search+write permission on the parent directory
195 static int jfs_mkdir(struct user_namespace
*mnt_userns
, struct inode
*dip
,
196 struct dentry
*dentry
, umode_t 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:%pd", dip
, dentry
);
209 rc
= dquot_initialize(dip
);
214 * search parent directory for entry/freespace
215 * (dtSearch() returns parent directory page pinned)
217 if ((rc
= get_UCSname(&dname
, dentry
)))
221 * Either iAlloc() or txBegin() may block. Deadlock can occur if we
222 * block there while holding dtree page, so we allocate the inode &
223 * begin the transaction before we search the directory.
225 ip
= ialloc(dip
, S_IFDIR
| mode
);
231 tid
= txBegin(dip
->i_sb
, 0);
233 mutex_lock_nested(&JFS_IP(dip
)->commit_mutex
, COMMIT_MUTEX_PARENT
);
234 mutex_lock_nested(&JFS_IP(ip
)->commit_mutex
, COMMIT_MUTEX_CHILD
);
236 rc
= jfs_init_acl(tid
, ip
, dip
);
240 rc
= jfs_init_security(tid
, ip
, dip
, &dentry
->d_name
);
246 if ((rc
= dtSearch(dip
, &dname
, &ino
, &btstack
, JFS_CREATE
))) {
247 jfs_err("jfs_mkdir: dtSearch returned %d", rc
);
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
;
261 * initialize the child directory in-line in inode
263 dtInitRoot(tid
, ip
, dip
->i_ino
);
266 * create entry in parent directory for child directory
267 * (dtInsert() releases parent directory page)
270 if ((rc
= dtInsert(tid
, dip
, &dname
, &ino
, &btstack
))) {
272 jfs_err("jfs_mkdir: dtInsert returned -EIO");
273 txAbort(tid
, 1); /* Marks Filesystem dirty */
275 txAbort(tid
, 0); /* Filesystem full */
279 set_nlink(ip
, 2); /* for '.' */
280 ip
->i_op
= &jfs_dir_inode_operations
;
281 ip
->i_fop
= &jfs_dir_operations
;
283 mark_inode_dirty(ip
);
285 /* update parent directory inode */
286 inc_nlink(dip
); /* for '..' from child directory */
287 dip
->i_ctime
= dip
->i_mtime
= current_time(dip
);
288 mark_inode_dirty(dip
);
290 rc
= txCommit(tid
, 2, &iplist
[0], 0);
294 mutex_unlock(&JFS_IP(ip
)->commit_mutex
);
295 mutex_unlock(&JFS_IP(dip
)->commit_mutex
);
299 discard_new_inode(ip
);
301 d_instantiate_new(dentry
, ip
);
305 free_UCSname(&dname
);
310 jfs_info("jfs_mkdir: rc:%d", rc
);
315 * NAME: jfs_rmdir(dip, dentry)
317 * FUNCTION: remove a link to child directory
319 * PARAMETER: dip - parent inode
320 * dentry - child directory dentry
322 * RETURN: -EINVAL - if name is . or ..
323 * -EINVAL - if . or .. exist but are invalid.
324 * errors from subroutines
327 * if other threads have the directory open when the last link
328 * is removed, the "." and ".." entries, if present, are removed before
329 * rmdir() returns and no new entries may be created in the directory,
330 * but the directory is not removed until the last reference to
331 * the directory is released (cf.unlink() of regular file).
333 static int jfs_rmdir(struct inode
*dip
, struct dentry
*dentry
)
336 tid_t tid
; /* transaction id */
337 struct inode
*ip
= d_inode(dentry
);
339 struct component_name dname
;
340 struct inode
*iplist
[2];
343 jfs_info("jfs_rmdir: dip:0x%p name:%pd", dip
, dentry
);
345 /* Init inode for quota operations. */
346 rc
= dquot_initialize(dip
);
349 rc
= dquot_initialize(ip
);
353 /* directory must be empty to be removed */
359 if ((rc
= get_UCSname(&dname
, dentry
))) {
363 tid
= txBegin(dip
->i_sb
, 0);
365 mutex_lock_nested(&JFS_IP(dip
)->commit_mutex
, COMMIT_MUTEX_PARENT
);
366 mutex_lock_nested(&JFS_IP(ip
)->commit_mutex
, COMMIT_MUTEX_CHILD
);
371 tblk
= tid_to_tblock(tid
);
372 tblk
->xflag
|= COMMIT_DELETE
;
376 * delete the entry of target directory from parent directory
379 if ((rc
= dtDelete(tid
, dip
, &dname
, &ino
, JFS_REMOVE
))) {
380 jfs_err("jfs_rmdir: dtDelete returned %d", rc
);
384 mutex_unlock(&JFS_IP(ip
)->commit_mutex
);
385 mutex_unlock(&JFS_IP(dip
)->commit_mutex
);
390 /* update parent directory's link count corresponding
391 * to ".." entry of the target directory deleted
393 dip
->i_ctime
= dip
->i_mtime
= current_time(dip
);
394 inode_dec_link_count(dip
);
397 * OS/2 could have created EA and/or ACL
399 /* free EA from both persistent and working map */
400 if (JFS_IP(ip
)->ea
.flag
& DXD_EXTENT
) {
402 txEA(tid
, ip
, &JFS_IP(ip
)->ea
, NULL
);
404 JFS_IP(ip
)->ea
.flag
= 0;
406 /* free ACL from both persistent and working map */
407 if (JFS_IP(ip
)->acl
.flag
& DXD_EXTENT
) {
409 txEA(tid
, ip
, &JFS_IP(ip
)->acl
, NULL
);
411 JFS_IP(ip
)->acl
.flag
= 0;
413 /* mark the target directory as deleted */
415 mark_inode_dirty(ip
);
417 rc
= txCommit(tid
, 2, &iplist
[0], 0);
421 mutex_unlock(&JFS_IP(ip
)->commit_mutex
);
422 mutex_unlock(&JFS_IP(dip
)->commit_mutex
);
425 * Truncating the directory index table is not guaranteed. It
426 * may need to be done iteratively
428 if (test_cflag(COMMIT_Stale
, dip
)) {
430 jfs_truncate_nolock(dip
, 0);
432 clear_cflag(COMMIT_Stale
, dip
);
436 free_UCSname(&dname
);
439 jfs_info("jfs_rmdir: rc:%d", rc
);
444 * NAME: jfs_unlink(dip, dentry)
446 * FUNCTION: remove a link to object <vp> named by <name>
447 * from parent directory <dvp>
449 * PARAMETER: dip - inode of parent directory
450 * dentry - dentry of object to be removed
452 * RETURN: errors from subroutines
455 * temporary file: if one or more processes have the file open
456 * when the last link is removed, the link will be removed before
457 * unlink() returns, but the removal of the file contents will be
458 * postponed until all references to the files are closed.
460 * JFS does NOT support unlink() on directories.
463 static int jfs_unlink(struct inode
*dip
, struct dentry
*dentry
)
466 tid_t tid
; /* transaction id */
467 struct inode
*ip
= d_inode(dentry
);
469 struct component_name dname
; /* object name */
470 struct inode
*iplist
[2];
475 jfs_info("jfs_unlink: dip:0x%p name:%pd", dip
, dentry
);
477 /* Init inode for quota operations. */
478 rc
= dquot_initialize(dip
);
481 rc
= dquot_initialize(ip
);
485 if ((rc
= get_UCSname(&dname
, dentry
)))
488 IWRITE_LOCK(ip
, RDWRLOCK_NORMAL
);
490 tid
= txBegin(dip
->i_sb
, 0);
492 mutex_lock_nested(&JFS_IP(dip
)->commit_mutex
, COMMIT_MUTEX_PARENT
);
493 mutex_lock_nested(&JFS_IP(ip
)->commit_mutex
, COMMIT_MUTEX_CHILD
);
499 * delete the entry of target file from parent directory
502 if ((rc
= dtDelete(tid
, dip
, &dname
, &ino
, JFS_REMOVE
))) {
503 jfs_err("jfs_unlink: dtDelete returned %d", rc
);
505 txAbort(tid
, 1); /* Marks FS Dirty */
507 mutex_unlock(&JFS_IP(ip
)->commit_mutex
);
508 mutex_unlock(&JFS_IP(dip
)->commit_mutex
);
515 ip
->i_ctime
= dip
->i_ctime
= dip
->i_mtime
= current_time(ip
);
516 mark_inode_dirty(dip
);
518 /* update target's inode */
519 inode_dec_link_count(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(ip
)->commit_mutex
);
531 mutex_unlock(&JFS_IP(dip
)->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(ip
)->commit_mutex
);
560 mutex_unlock(&JFS_IP(dip
)->commit_mutex
);
562 while (new_size
&& (rc
== 0)) {
563 tid
= txBegin(dip
->i_sb
, 0);
564 mutex_lock(&JFS_IP(ip
)->commit_mutex
);
565 new_size
= xtTruncate_pmap(tid
, ip
, new_size
);
567 txAbort(tid
, 1); /* Marks FS Dirty */
570 rc
= txCommit(tid
, 2, &iplist
[0], COMMIT_SYNC
);
572 mutex_unlock(&JFS_IP(ip
)->commit_mutex
);
575 if (ip
->i_nlink
== 0)
576 set_cflag(COMMIT_Nolink
, ip
);
581 * Truncating the directory index table is not guaranteed. It
582 * may need to be done iteratively
584 if (test_cflag(COMMIT_Stale
, dip
)) {
586 jfs_truncate_nolock(dip
, 0);
588 clear_cflag(COMMIT_Stale
, dip
);
592 free_UCSname(&dname
);
594 jfs_info("jfs_unlink: rc:%d", rc
);
599 * NAME: commitZeroLink()
601 * FUNCTION: for non-directory, called by jfs_remove(),
602 * truncate a regular file, directory or symbolic
603 * link to zero length. return 0 if type is not
606 * if the file is currently associated with a VM segment
607 * only permanent disk and inode map resources are freed,
608 * and neither the inode nor indirect blocks are modified
609 * so that the resources can be later freed in the work
611 * if there is no VM segment on entry, the resources are
612 * freed in both work and permanent map.
613 * (? for temporary file - memory object is cached even
614 * after no reference:
615 * reference count > 0 - )
617 * PARAMETERS: cd - pointer to commit data structure.
618 * current inode is the one to truncate.
620 * RETURN: Errors from subroutines
622 static s64
commitZeroLink(tid_t tid
, struct inode
*ip
)
627 jfs_info("commitZeroLink: tid = %d, ip = 0x%p", tid
, ip
);
629 filetype
= ip
->i_mode
& S_IFMT
;
634 /* fast symbolic link */
635 if (ip
->i_size
< IDATASIZE
) {
641 assert(filetype
!= S_IFDIR
);
645 set_cflag(COMMIT_Freewmap
, ip
);
647 /* mark transaction of block map update type */
648 tblk
= tid_to_tblock(tid
);
649 tblk
->xflag
|= COMMIT_PMAP
;
654 if (JFS_IP(ip
)->ea
.flag
& DXD_EXTENT
)
655 /* acquire maplock on EA to be freed from block map */
656 txEA(tid
, ip
, &JFS_IP(ip
)->ea
, NULL
);
661 if (JFS_IP(ip
)->acl
.flag
& DXD_EXTENT
)
662 /* acquire maplock on EA to be freed from block map */
663 txEA(tid
, ip
, &JFS_IP(ip
)->acl
, NULL
);
666 * free xtree/data (truncate to zero length):
667 * free xtree/data pages from cache if COMMIT_PWMAP,
668 * free xtree/data blocks from persistent block map, and
669 * free xtree/data blocks from working block map if COMMIT_PWMAP;
672 return xtTruncate_pmap(tid
, ip
, 0);
679 * NAME: jfs_free_zero_link()
681 * FUNCTION: for non-directory, called by iClose(),
682 * free resources of a file from cache and WORKING map
683 * for a file previously committed with zero link count
684 * while associated with a pager object,
686 * PARAMETER: ip - pointer to inode of file.
688 void jfs_free_zero_link(struct inode
*ip
)
692 jfs_info("jfs_free_zero_link: ip = 0x%p", ip
);
694 /* return if not reg or symbolic link or if size is
697 type
= ip
->i_mode
& S_IFMT
;
703 /* if its contained in inode nothing to do */
704 if (ip
->i_size
< IDATASIZE
)
714 if (JFS_IP(ip
)->ea
.flag
& DXD_EXTENT
) {
715 s64 xaddr
= addressDXD(&JFS_IP(ip
)->ea
);
716 int xlen
= lengthDXD(&JFS_IP(ip
)->ea
);
717 struct maplock maplock
; /* maplock for COMMIT_WMAP */
718 struct pxd_lock
*pxdlock
; /* maplock for COMMIT_WMAP */
720 /* free EA pages from cache */
721 invalidate_dxd_metapages(ip
, JFS_IP(ip
)->ea
);
723 /* free EA extent from working block map */
725 pxdlock
= (struct pxd_lock
*) & maplock
;
726 pxdlock
->flag
= mlckFREEPXD
;
727 PXDaddress(&pxdlock
->pxd
, xaddr
);
728 PXDlength(&pxdlock
->pxd
, xlen
);
729 txFreeMap(ip
, pxdlock
, NULL
, COMMIT_WMAP
);
735 if (JFS_IP(ip
)->acl
.flag
& DXD_EXTENT
) {
736 s64 xaddr
= addressDXD(&JFS_IP(ip
)->acl
);
737 int xlen
= lengthDXD(&JFS_IP(ip
)->acl
);
738 struct maplock maplock
; /* maplock for COMMIT_WMAP */
739 struct pxd_lock
*pxdlock
; /* maplock for COMMIT_WMAP */
741 invalidate_dxd_metapages(ip
, JFS_IP(ip
)->acl
);
743 /* free ACL extent from working block map */
745 pxdlock
= (struct pxd_lock
*) & maplock
;
746 pxdlock
->flag
= mlckFREEPXD
;
747 PXDaddress(&pxdlock
->pxd
, xaddr
);
748 PXDlength(&pxdlock
->pxd
, xlen
);
749 txFreeMap(ip
, pxdlock
, NULL
, COMMIT_WMAP
);
753 * free xtree/data (truncate to zero length):
754 * free xtree/data pages from cache, and
755 * free xtree/data blocks from working block map;
758 xtTruncate(0, ip
, 0, COMMIT_WMAP
);
762 * NAME: jfs_link(vp, dvp, name, crp)
764 * FUNCTION: create a link to <vp> by the name = <name>
765 * in the parent directory <dvp>
767 * PARAMETER: vp - target object
768 * dvp - parent directory of new link
769 * name - name of new link to target object
772 * RETURN: Errors from subroutines
775 * JFS does NOT support link() on directories (to prevent circular
776 * path in the directory hierarchy);
777 * EPERM: the target object is a directory, and either the caller
778 * does not have appropriate privileges or the implementation prohibits
779 * using link() on directories [XPG4.2].
781 * JFS does NOT support links between file systems:
782 * EXDEV: target object and new link are on different file systems and
783 * implementation does not support links between file systems [XPG4.2].
785 static int jfs_link(struct dentry
*old_dentry
,
786 struct inode
*dir
, struct dentry
*dentry
)
790 struct inode
*ip
= d_inode(old_dentry
);
792 struct component_name dname
;
793 struct btstack btstack
;
794 struct inode
*iplist
[2];
796 jfs_info("jfs_link: %pd %pd", old_dentry
, dentry
);
798 rc
= dquot_initialize(dir
);
802 tid
= txBegin(ip
->i_sb
, 0);
804 mutex_lock_nested(&JFS_IP(dir
)->commit_mutex
, COMMIT_MUTEX_PARENT
);
805 mutex_lock_nested(&JFS_IP(ip
)->commit_mutex
, COMMIT_MUTEX_CHILD
);
808 * scan parent directory for entry/freespace
810 if ((rc
= get_UCSname(&dname
, dentry
)))
813 if ((rc
= dtSearch(dir
, &dname
, &ino
, &btstack
, JFS_CREATE
)))
817 * create entry for new link in parent directory
820 if ((rc
= dtInsert(tid
, dir
, &dname
, &ino
, &btstack
)))
823 /* update object inode */
824 inc_nlink(ip
); /* for new link */
825 ip
->i_ctime
= current_time(ip
);
826 dir
->i_ctime
= dir
->i_mtime
= current_time(dir
);
827 mark_inode_dirty(dir
);
832 rc
= txCommit(tid
, 2, &iplist
[0], 0);
835 drop_nlink(ip
); /* never instantiated */
838 d_instantiate(dentry
, ip
);
841 free_UCSname(&dname
);
846 mutex_unlock(&JFS_IP(ip
)->commit_mutex
);
847 mutex_unlock(&JFS_IP(dir
)->commit_mutex
);
850 jfs_info("jfs_link: rc:%d", rc
);
855 * NAME: jfs_symlink(dip, dentry, name)
857 * FUNCTION: creates a symbolic link to <symlink> by name <name>
860 * PARAMETER: dip - parent directory vnode
861 * dentry - dentry of symbolic link
862 * name - the path name of the existing object
863 * that will be the source of the link
865 * RETURN: errors from subroutines
868 * ENAMETOOLONG: pathname resolution of a symbolic link produced
869 * an intermediate result whose length exceeds PATH_MAX [XPG4.2]
872 static int jfs_symlink(struct user_namespace
*mnt_userns
, struct inode
*dip
,
873 struct dentry
*dentry
, const char *name
)
878 struct component_name dname
;
879 int ssize
; /* source pathname size */
880 struct btstack btstack
;
881 struct inode
*ip
= d_inode(dentry
);
883 int bmask
= 0, xsize
;
886 struct super_block
*sb
;
889 struct inode
*iplist
[2];
891 jfs_info("jfs_symlink: dip:0x%p name:%s", dip
, name
);
893 rc
= dquot_initialize(dip
);
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_nested(&JFS_IP(dip
)->commit_mutex
, COMMIT_MUTEX_PARENT
);
920 mutex_lock_nested(&JFS_IP(ip
)->commit_mutex
, COMMIT_MUTEX_CHILD
);
922 rc
= jfs_init_security(tid
, ip
, dip
, &dentry
->d_name
);
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_fast_symlink_inode_operations
;
949 ip
->i_link
= JFS_IP(ip
)->i_inline
;
950 memcpy(ip
->i_link
, 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
= &jfs_symlink_inode_operations
;
971 ip
->i_mapping
->a_ops
= &jfs_aops
;
974 * even though the data of symlink object (source
975 * path name) is treated as non-journaled user data,
976 * it is read/written thru buffer cache for performance.
979 bmask
= JFS_SBI(sb
)->bsize
- 1;
980 xsize
= (ssize
+ bmask
) & ~bmask
;
982 xlen
= xsize
>> JFS_SBI(sb
)->l2bsize
;
983 if ((rc
= xtInsert(tid
, ip
, 0, 0, xlen
, &xaddr
, 0))) {
987 ip
->i_size
= ssize
- 1;
989 /* This is kind of silly since PATH_MAX == 4K */
990 int copy_size
= min(ssize
, PSIZE
);
992 mp
= get_metapage(ip
, xaddr
, PSIZE
, 1);
995 xtTruncate(tid
, ip
, 0, COMMIT_PWMAP
);
1000 memcpy(mp
->data
, name
, copy_size
);
1004 xaddr
+= JFS_SBI(sb
)->nbperpage
;
1009 * create entry for symbolic link in parent directory
1011 rc
= dtSearch(dip
, &dname
, &ino
, &btstack
, JFS_CREATE
);
1014 rc
= dtInsert(tid
, dip
, &dname
, &ino
, &btstack
);
1018 xtTruncate(tid
, ip
, 0, COMMIT_PWMAP
);
1020 /* discard new inode */
1024 mark_inode_dirty(ip
);
1026 dip
->i_ctime
= dip
->i_mtime
= current_time(dip
);
1027 mark_inode_dirty(dip
);
1029 * commit update of parent directory and link object
1034 rc
= txCommit(tid
, 2, &iplist
[0], 0);
1038 mutex_unlock(&JFS_IP(ip
)->commit_mutex
);
1039 mutex_unlock(&JFS_IP(dip
)->commit_mutex
);
1043 discard_new_inode(ip
);
1045 d_instantiate_new(dentry
, ip
);
1049 free_UCSname(&dname
);
1052 jfs_info("jfs_symlink: rc:%d", rc
);
1060 * FUNCTION: rename a file or directory
1062 static int jfs_rename(struct user_namespace
*mnt_userns
, struct inode
*old_dir
,
1063 struct dentry
*old_dentry
, struct inode
*new_dir
,
1064 struct dentry
*new_dentry
, unsigned int flags
)
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
;
1083 if (flags
& ~RENAME_NOREPLACE
)
1086 jfs_info("jfs_rename: %pd %pd", old_dentry
, new_dentry
);
1088 rc
= dquot_initialize(old_dir
);
1091 rc
= dquot_initialize(new_dir
);
1095 old_ip
= d_inode(old_dentry
);
1096 new_ip
= d_inode(new_dentry
);
1098 if ((rc
= get_UCSname(&old_dname
, old_dentry
)))
1101 if ((rc
= get_UCSname(&new_dname
, new_dentry
)))
1105 * Make sure source inode number is what we think it is
1107 rc
= dtSearch(old_dir
, &old_dname
, &ino
, &btstack
, JFS_LOOKUP
);
1108 if (rc
|| (ino
!= old_ip
->i_ino
)) {
1114 * Make sure dest inode number (if any) is what we think it is
1116 rc
= dtSearch(new_dir
, &new_dname
, &ino
, &btstack
, JFS_LOOKUP
);
1118 if ((!new_ip
) || (ino
!= new_ip
->i_ino
)) {
1122 } else if (rc
!= -ENOENT
)
1125 /* no entry exists, but one was expected */
1130 if (S_ISDIR(old_ip
->i_mode
)) {
1132 if (!dtEmpty(new_ip
)) {
1137 } else if (new_ip
) {
1138 IWRITE_LOCK(new_ip
, RDWRLOCK_NORMAL
);
1139 /* Init inode for quota operations. */
1140 rc
= dquot_initialize(new_ip
);
1146 * The real work starts here
1148 tid
= txBegin(new_dir
->i_sb
, 0);
1151 * How do we know the locking is safe from deadlocks?
1152 * The vfs does the hard part for us. Any time we are taking nested
1153 * commit_mutexes, the vfs already has i_mutex held on the parent.
1154 * Here, the vfs has already taken i_mutex on both old_dir and new_dir.
1156 mutex_lock_nested(&JFS_IP(new_dir
)->commit_mutex
, COMMIT_MUTEX_PARENT
);
1157 mutex_lock_nested(&JFS_IP(old_ip
)->commit_mutex
, COMMIT_MUTEX_CHILD
);
1158 if (old_dir
!= new_dir
)
1159 mutex_lock_nested(&JFS_IP(old_dir
)->commit_mutex
,
1160 COMMIT_MUTEX_SECOND_PARENT
);
1163 mutex_lock_nested(&JFS_IP(new_ip
)->commit_mutex
,
1164 COMMIT_MUTEX_VICTIM
);
1166 * Change existing directory entry to new inode number
1168 ino
= new_ip
->i_ino
;
1169 rc
= dtModify(tid
, new_dir
, &new_dname
, &ino
,
1170 old_ip
->i_ino
, JFS_RENAME
);
1174 if (S_ISDIR(new_ip
->i_mode
)) {
1176 if (new_ip
->i_nlink
) {
1177 mutex_unlock(&JFS_IP(new_ip
)->commit_mutex
);
1178 if (old_dir
!= new_dir
)
1179 mutex_unlock(&JFS_IP(old_dir
)->commit_mutex
);
1180 mutex_unlock(&JFS_IP(old_ip
)->commit_mutex
);
1181 mutex_unlock(&JFS_IP(new_dir
)->commit_mutex
);
1182 if (!S_ISDIR(old_ip
->i_mode
) && new_ip
)
1183 IWRITE_UNLOCK(new_ip
);
1184 jfs_error(new_ip
->i_sb
,
1185 "new_ip->i_nlink != 0\n");
1188 tblk
= tid_to_tblock(tid
);
1189 tblk
->xflag
|= COMMIT_DELETE
;
1190 tblk
->u
.ip
= new_ip
;
1191 } else if (new_ip
->i_nlink
== 0) {
1192 assert(!test_cflag(COMMIT_Nolink
, new_ip
));
1193 /* free block resources */
1194 if ((new_size
= commitZeroLink(tid
, new_ip
)) < 0) {
1195 txAbort(tid
, 1); /* Marks FS Dirty */
1199 tblk
= tid_to_tblock(tid
);
1200 tblk
->xflag
|= COMMIT_DELETE
;
1201 tblk
->u
.ip
= new_ip
;
1203 new_ip
->i_ctime
= current_time(new_ip
);
1204 mark_inode_dirty(new_ip
);
1208 * Add new directory entry
1210 rc
= dtSearch(new_dir
, &new_dname
, &ino
, &btstack
,
1213 jfs_err("jfs_rename didn't expect dtSearch to fail w/rc = %d",
1218 ino
= old_ip
->i_ino
;
1219 rc
= dtInsert(tid
, new_dir
, &new_dname
, &ino
, &btstack
);
1222 jfs_err("jfs_rename: dtInsert returned -EIO");
1225 if (S_ISDIR(old_ip
->i_mode
))
1229 * Remove old directory entry
1232 ino
= old_ip
->i_ino
;
1233 rc
= dtDelete(tid
, old_dir
, &old_dname
, &ino
, JFS_REMOVE
);
1235 jfs_err("jfs_rename did not expect dtDelete to return rc = %d",
1237 txAbort(tid
, 1); /* Marks Filesystem dirty */
1240 if (S_ISDIR(old_ip
->i_mode
)) {
1241 drop_nlink(old_dir
);
1242 if (old_dir
!= new_dir
) {
1244 * Change inode number of parent for moved directory
1247 JFS_IP(old_ip
)->i_dtroot
.header
.idotdot
=
1248 cpu_to_le32(new_dir
->i_ino
);
1250 /* Linelock header of dtree */
1251 tlck
= txLock(tid
, old_ip
,
1252 (struct metapage
*) &JFS_IP(old_ip
)->bxflag
,
1253 tlckDTREE
| tlckBTROOT
| tlckRELINK
);
1254 dtlck
= (struct dt_lock
*) & tlck
->lock
;
1255 ASSERT(dtlck
->index
== 0);
1256 lv
= & dtlck
->lv
[0];
1264 * Update ctime on changed/moved inodes & mark dirty
1266 old_ip
->i_ctime
= current_time(old_ip
);
1267 mark_inode_dirty(old_ip
);
1269 new_dir
->i_ctime
= new_dir
->i_mtime
= current_time(new_dir
);
1270 mark_inode_dirty(new_dir
);
1272 /* Build list of inodes modified by this transaction */
1274 iplist
[ipcount
++] = old_ip
;
1276 iplist
[ipcount
++] = new_ip
;
1277 iplist
[ipcount
++] = old_dir
;
1279 if (old_dir
!= new_dir
) {
1280 iplist
[ipcount
++] = new_dir
;
1281 old_dir
->i_ctime
= old_dir
->i_mtime
= current_time(old_dir
);
1282 mark_inode_dirty(old_dir
);
1286 * Incomplete truncate of file data can
1287 * result in timing problems unless we synchronously commit the
1291 commit_flag
= COMMIT_SYNC
;
1295 rc
= txCommit(tid
, ipcount
, iplist
, commit_flag
);
1300 mutex_unlock(&JFS_IP(new_ip
)->commit_mutex
);
1301 if (old_dir
!= new_dir
)
1302 mutex_unlock(&JFS_IP(old_dir
)->commit_mutex
);
1303 mutex_unlock(&JFS_IP(old_ip
)->commit_mutex
);
1304 mutex_unlock(&JFS_IP(new_dir
)->commit_mutex
);
1306 while (new_size
&& (rc
== 0)) {
1307 tid
= txBegin(new_ip
->i_sb
, 0);
1308 mutex_lock(&JFS_IP(new_ip
)->commit_mutex
);
1309 new_size
= xtTruncate_pmap(tid
, new_ip
, new_size
);
1314 rc
= txCommit(tid
, 1, &new_ip
, COMMIT_SYNC
);
1316 mutex_unlock(&JFS_IP(new_ip
)->commit_mutex
);
1318 if (new_ip
&& (new_ip
->i_nlink
== 0))
1319 set_cflag(COMMIT_Nolink
, new_ip
);
1321 * Truncating the directory index table is not guaranteed. It
1322 * may need to be done iteratively
1324 if (test_cflag(COMMIT_Stale
, old_dir
)) {
1325 if (old_dir
->i_size
> 1)
1326 jfs_truncate_nolock(old_dir
, 0);
1328 clear_cflag(COMMIT_Stale
, old_dir
);
1331 if (new_ip
&& !S_ISDIR(new_ip
->i_mode
))
1332 IWRITE_UNLOCK(new_ip
);
1334 free_UCSname(&new_dname
);
1336 free_UCSname(&old_dname
);
1338 jfs_info("jfs_rename: returning %d", rc
);
1346 * FUNCTION: Create a special file (device)
1348 static int jfs_mknod(struct user_namespace
*mnt_userns
, struct inode
*dir
,
1349 struct dentry
*dentry
, umode_t mode
, dev_t rdev
)
1351 struct jfs_inode_info
*jfs_ip
;
1352 struct btstack btstack
;
1353 struct component_name dname
;
1356 struct inode
*iplist
[2];
1359 struct tblock
*tblk
;
1361 jfs_info("jfs_mknod: %pd", dentry
);
1363 rc
= dquot_initialize(dir
);
1367 if ((rc
= get_UCSname(&dname
, dentry
)))
1370 ip
= ialloc(dir
, mode
);
1375 jfs_ip
= JFS_IP(ip
);
1377 tid
= txBegin(dir
->i_sb
, 0);
1379 mutex_lock_nested(&JFS_IP(dir
)->commit_mutex
, COMMIT_MUTEX_PARENT
);
1380 mutex_lock_nested(&JFS_IP(ip
)->commit_mutex
, COMMIT_MUTEX_CHILD
);
1382 rc
= jfs_init_acl(tid
, ip
, dir
);
1386 rc
= jfs_init_security(tid
, ip
, dir
, &dentry
->d_name
);
1392 if ((rc
= dtSearch(dir
, &dname
, &ino
, &btstack
, JFS_CREATE
))) {
1397 tblk
= tid_to_tblock(tid
);
1398 tblk
->xflag
|= COMMIT_CREATE
;
1399 tblk
->ino
= ip
->i_ino
;
1400 tblk
->u
.ixpxd
= JFS_IP(ip
)->ixpxd
;
1403 if ((rc
= dtInsert(tid
, dir
, &dname
, &ino
, &btstack
))) {
1408 ip
->i_op
= &jfs_file_inode_operations
;
1409 jfs_ip
->dev
= new_encode_dev(rdev
);
1410 init_special_inode(ip
, ip
->i_mode
, rdev
);
1412 mark_inode_dirty(ip
);
1414 dir
->i_ctime
= dir
->i_mtime
= current_time(dir
);
1416 mark_inode_dirty(dir
);
1420 rc
= txCommit(tid
, 2, iplist
, 0);
1424 mutex_unlock(&JFS_IP(ip
)->commit_mutex
);
1425 mutex_unlock(&JFS_IP(dir
)->commit_mutex
);
1429 discard_new_inode(ip
);
1431 d_instantiate_new(dentry
, ip
);
1435 free_UCSname(&dname
);
1438 jfs_info("jfs_mknod: returning %d", rc
);
1442 static struct dentry
*jfs_lookup(struct inode
*dip
, struct dentry
*dentry
, unsigned int flags
)
1444 struct btstack btstack
;
1447 struct component_name key
;
1450 jfs_info("jfs_lookup: name = %pd", dentry
);
1452 if ((rc
= get_UCSname(&key
, dentry
)))
1454 rc
= dtSearch(dip
, &key
, &inum
, &btstack
, JFS_LOOKUP
);
1456 if (rc
== -ENOENT
) {
1459 jfs_err("jfs_lookup: dtSearch returned %d", rc
);
1462 ip
= jfs_iget(dip
->i_sb
, inum
);
1464 jfs_err("jfs_lookup: iget failed on inum %d", (uint
)inum
);
1467 return d_splice_alias(ip
, dentry
);
1470 static struct inode
*jfs_nfs_get_inode(struct super_block
*sb
,
1471 u64 ino
, u32 generation
)
1473 struct inode
*inode
;
1476 return ERR_PTR(-ESTALE
);
1477 inode
= jfs_iget(sb
, ino
);
1479 return ERR_CAST(inode
);
1481 if (generation
&& inode
->i_generation
!= generation
) {
1483 return ERR_PTR(-ESTALE
);
1489 struct dentry
*jfs_fh_to_dentry(struct super_block
*sb
, struct fid
*fid
,
1490 int fh_len
, int fh_type
)
1492 return generic_fh_to_dentry(sb
, fid
, fh_len
, fh_type
,
1496 struct dentry
*jfs_fh_to_parent(struct super_block
*sb
, struct fid
*fid
,
1497 int fh_len
, int fh_type
)
1499 return generic_fh_to_parent(sb
, fid
, fh_len
, fh_type
,
1503 struct dentry
*jfs_get_parent(struct dentry
*dentry
)
1505 unsigned long parent_ino
;
1508 le32_to_cpu(JFS_IP(d_inode(dentry
))->i_dtroot
.header
.idotdot
);
1510 return d_obtain_alias(jfs_iget(dentry
->d_sb
, parent_ino
));
1513 const struct inode_operations jfs_dir_inode_operations
= {
1514 .create
= jfs_create
,
1515 .lookup
= jfs_lookup
,
1517 .unlink
= jfs_unlink
,
1518 .symlink
= jfs_symlink
,
1522 .rename
= jfs_rename
,
1523 .listxattr
= jfs_listxattr
,
1524 .setattr
= jfs_setattr
,
1525 .fileattr_get
= jfs_fileattr_get
,
1526 .fileattr_set
= jfs_fileattr_set
,
1527 #ifdef CONFIG_JFS_POSIX_ACL
1528 .get_acl
= jfs_get_acl
,
1529 .set_acl
= jfs_set_acl
,
1533 const struct file_operations jfs_dir_operations
= {
1534 .read
= generic_read_dir
,
1535 .iterate
= jfs_readdir
,
1537 .unlocked_ioctl
= jfs_ioctl
,
1538 .compat_ioctl
= compat_ptr_ioctl
,
1539 .llseek
= generic_file_llseek
,
1542 static int jfs_ci_hash(const struct dentry
*dir
, struct qstr
*this)
1547 hash
= init_name_hash(dir
);
1548 for (i
=0; i
< this->len
; i
++)
1549 hash
= partial_name_hash(tolower(this->name
[i
]), hash
);
1550 this->hash
= end_name_hash(hash
);
1555 static int jfs_ci_compare(const struct dentry
*dentry
,
1556 unsigned int len
, const char *str
, const struct qstr
*name
)
1560 if (len
!= name
->len
)
1562 for (i
=0; i
< len
; i
++) {
1563 if (tolower(str
[i
]) != tolower(name
->name
[i
]))
1571 static int jfs_ci_revalidate(struct dentry
*dentry
, unsigned int flags
)
1574 * This is not negative dentry. Always valid.
1576 * Note, rename() to existing directory entry will have ->d_inode,
1577 * and will use existing name which isn't specified name by user.
1579 * We may be able to drop this positive dentry here. But dropping
1580 * positive dentry isn't good idea. So it's unsupported like
1581 * rename("filename", "FILENAME") for now.
1583 if (d_really_is_positive(dentry
))
1587 * This may be nfsd (or something), anyway, we can't see the
1588 * intent of this. So, since this can be for creation, drop it.
1594 * Drop the negative dentry, in order to make sure to use the
1595 * case sensitive name which is specified by user if this is
1598 if (flags
& (LOOKUP_CREATE
| LOOKUP_RENAME_TARGET
))
1603 const struct dentry_operations jfs_ci_dentry_operations
=
1605 .d_hash
= jfs_ci_hash
,
1606 .d_compare
= jfs_ci_compare
,
1607 .d_revalidate
= jfs_ci_revalidate
,