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"
34 extern struct inode_operations jfs_file_inode_operations;
35 extern struct inode_operations jfs_symlink_inode_operations;
36 extern struct file_operations jfs_file_operations;
37 extern struct address_space_operations jfs_aops;
39 extern int jfs_fsync(struct file *, struct dentry *, int);
40 extern void jfs_truncate_nolock(struct inode *, loff_t);
41 extern int jfs_init_acl(struct inode *, struct inode *);
46 struct inode_operations jfs_dir_inode_operations;
47 struct file_operations jfs_dir_operations;
48 struct dentry_operations jfs_ci_dentry_operations;
50 static s64 commitZeroLink(tid_t, struct inode *);
53 * NAME: jfs_create(dip, dentry, mode)
55 * FUNCTION: create a regular file in the parent directory <dip>
56 * with name = <from dentry> and mode = <mode>
58 * PARAMETER: dip - parent directory vnode
59 * dentry - dentry of new file
60 * mode - create mode (rwxrwxrwx).
63 * RETURN: Errors from subroutines
66 static int jfs_create(struct inode *dip, struct dentry *dentry, int mode,
70 tid_t tid; /* transaction id */
71 struct inode *ip = NULL; /* child directory inode */
73 struct component_name dname; /* child directory name */
74 struct btstack btstack;
75 struct inode *iplist[2];
78 jfs_info("jfs_create: dip:0x%p name:%s", dip, dentry->d_name.name);
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 down(&JFS_IP(dip)->commit_sem);
101 down(&JFS_IP(ip)->commit_sem);
103 if ((rc = dtSearch(dip, &dname, &ino, &btstack, JFS_CREATE))) {
104 jfs_err("jfs_create: dtSearch returned %d", rc);
108 tblk = tid_to_tblock(tid);
109 tblk->xflag |= COMMIT_CREATE;
110 tblk->ino = ip->i_ino;
111 tblk->u.ixpxd = JFS_IP(ip)->ixpxd;
117 * initialize the child XAD tree root in-line in inode
122 * create entry in parent directory for child directory
123 * (dtInsert() releases parent directory page)
126 if ((rc = dtInsert(tid, dip, &dname, &ino, &btstack))) {
128 jfs_err("jfs_create: dtInsert returned -EIO");
129 txAbort(tid, 1); /* Marks Filesystem dirty */
131 txAbort(tid, 0); /* Filesystem full */
135 ip->i_op = &jfs_file_inode_operations;
136 ip->i_fop = &jfs_file_operations;
137 ip->i_mapping->a_ops = &jfs_aops;
139 insert_inode_hash(ip);
140 mark_inode_dirty(ip);
142 dip->i_ctime = dip->i_mtime = CURRENT_TIME;
144 mark_inode_dirty(dip);
146 rc = txCommit(tid, 2, &iplist[0], 0);
150 up(&JFS_IP(dip)->commit_sem);
151 up(&JFS_IP(ip)->commit_sem);
156 d_instantiate(dentry, ip);
159 free_UCSname(&dname);
161 #ifdef CONFIG_JFS_POSIX_ACL
163 jfs_init_acl(ip, dip);
168 jfs_info("jfs_create: rc:%d", rc);
174 * NAME: jfs_mkdir(dip, dentry, mode)
176 * FUNCTION: create a child directory in the parent directory <dip>
177 * with name = <from dentry> and mode = <mode>
179 * PARAMETER: dip - parent directory vnode
180 * dentry - dentry of child directory
181 * mode - create mode (rwxrwxrwx).
183 * RETURN: Errors from subroutines
186 * EACCESS: user needs search+write permission on the parent directory
188 static int jfs_mkdir(struct inode *dip, struct dentry *dentry, int mode)
191 tid_t tid; /* transaction id */
192 struct inode *ip = NULL; /* child directory inode */
194 struct component_name dname; /* child directory name */
195 struct btstack btstack;
196 struct inode *iplist[2];
199 jfs_info("jfs_mkdir: dip:0x%p name:%s", dip, dentry->d_name.name);
201 /* link count overflow on parent directory ? */
202 if (dip->i_nlink == JFS_LINK_MAX) {
208 * search parent directory for entry/freespace
209 * (dtSearch() returns parent directory page pinned)
211 if ((rc = get_UCSname(&dname, dentry)))
215 * Either iAlloc() or txBegin() may block. Deadlock can occur if we
216 * block there while holding dtree page, so we allocate the inode &
217 * begin the transaction before we search the directory.
219 ip = ialloc(dip, S_IFDIR | mode);
225 tid = txBegin(dip->i_sb, 0);
227 down(&JFS_IP(dip)->commit_sem);
228 down(&JFS_IP(ip)->commit_sem);
230 if ((rc = dtSearch(dip, &dname, &ino, &btstack, JFS_CREATE))) {
231 jfs_err("jfs_mkdir: dtSearch returned %d", rc);
235 tblk = tid_to_tblock(tid);
236 tblk->xflag |= COMMIT_CREATE;
237 tblk->ino = ip->i_ino;
238 tblk->u.ixpxd = JFS_IP(ip)->ixpxd;
244 * initialize the child directory in-line in inode
246 dtInitRoot(tid, ip, dip->i_ino);
249 * create entry in parent directory for child directory
250 * (dtInsert() releases parent directory page)
253 if ((rc = dtInsert(tid, dip, &dname, &ino, &btstack))) {
255 jfs_err("jfs_mkdir: dtInsert returned -EIO");
256 txAbort(tid, 1); /* Marks Filesystem dirty */
258 txAbort(tid, 0); /* Filesystem full */
262 ip->i_nlink = 2; /* for '.' */
263 ip->i_op = &jfs_dir_inode_operations;
264 ip->i_fop = &jfs_dir_operations;
266 insert_inode_hash(ip);
267 mark_inode_dirty(ip);
269 /* update parent directory inode */
270 dip->i_nlink++; /* for '..' from child directory */
271 dip->i_ctime = dip->i_mtime = CURRENT_TIME;
272 mark_inode_dirty(dip);
274 rc = txCommit(tid, 2, &iplist[0], 0);
278 up(&JFS_IP(dip)->commit_sem);
279 up(&JFS_IP(ip)->commit_sem);
284 d_instantiate(dentry, ip);
287 free_UCSname(&dname);
289 #ifdef CONFIG_JFS_POSIX_ACL
291 jfs_init_acl(ip, dip);
296 jfs_info("jfs_mkdir: rc:%d", rc);
301 * NAME: jfs_rmdir(dip, dentry)
303 * FUNCTION: remove a link to child directory
305 * PARAMETER: dip - parent inode
306 * dentry - child directory dentry
308 * RETURN: -EINVAL - if name is . or ..
309 * -EINVAL - if . or .. exist but are invalid.
310 * errors from subroutines
313 * if other threads have the directory open when the last link
314 * is removed, the "." and ".." entries, if present, are removed before
315 * rmdir() returns and no new entries may be created in the directory,
316 * but the directory is not removed until the last reference to
317 * the directory is released (cf.unlink() of regular file).
319 static int jfs_rmdir(struct inode *dip, struct dentry *dentry)
322 tid_t tid; /* transaction id */
323 struct inode *ip = dentry->d_inode;
325 struct component_name dname;
326 struct inode *iplist[2];
329 jfs_info("jfs_rmdir: dip:0x%p name:%s", dip, dentry->d_name.name);
331 /* Init inode for quota operations. */
334 /* directory must be empty to be removed */
340 if ((rc = get_UCSname(&dname, dentry))) {
344 tid = txBegin(dip->i_sb, 0);
346 down(&JFS_IP(dip)->commit_sem);
347 down(&JFS_IP(ip)->commit_sem);
352 tblk = tid_to_tblock(tid);
353 tblk->xflag |= COMMIT_DELETE;
357 * delete the entry of target directory from parent directory
360 if ((rc = dtDelete(tid, dip, &dname, &ino, JFS_REMOVE))) {
361 jfs_err("jfs_rmdir: dtDelete returned %d", rc);
365 up(&JFS_IP(dip)->commit_sem);
366 up(&JFS_IP(ip)->commit_sem);
371 /* update parent directory's link count corresponding
372 * to ".." entry of the target directory deleted
375 dip->i_ctime = dip->i_mtime = CURRENT_TIME;
376 mark_inode_dirty(dip);
379 * OS/2 could have created EA and/or ACL
381 /* free EA from both persistent and working map */
382 if (JFS_IP(ip)->ea.flag & DXD_EXTENT) {
384 txEA(tid, ip, &JFS_IP(ip)->ea, NULL);
386 JFS_IP(ip)->ea.flag = 0;
388 /* free ACL from both persistent and working map */
389 if (JFS_IP(ip)->acl.flag & DXD_EXTENT) {
391 txEA(tid, ip, &JFS_IP(ip)->acl, NULL);
393 JFS_IP(ip)->acl.flag = 0;
395 /* mark the target directory as deleted */
397 mark_inode_dirty(ip);
399 rc = txCommit(tid, 2, &iplist[0], 0);
403 up(&JFS_IP(dip)->commit_sem);
404 up(&JFS_IP(ip)->commit_sem);
407 * Truncating the directory index table is not guaranteed. It
408 * may need to be done iteratively
410 if (test_cflag(COMMIT_Stale, dip)) {
412 jfs_truncate_nolock(dip, 0);
414 clear_cflag(COMMIT_Stale, dip);
418 free_UCSname(&dname);
421 jfs_info("jfs_rmdir: rc:%d", rc);
426 * NAME: jfs_unlink(dip, dentry)
428 * FUNCTION: remove a link to object <vp> named by <name>
429 * from parent directory <dvp>
431 * PARAMETER: dip - inode of parent directory
432 * dentry - dentry of object to be removed
434 * RETURN: errors from subroutines
437 * temporary file: if one or more processes have the file open
438 * when the last link is removed, the link will be removed before
439 * unlink() returns, but the removal of the file contents will be
440 * postponed until all references to the files are closed.
442 * JFS does NOT support unlink() on directories.
445 static int jfs_unlink(struct inode *dip, struct dentry *dentry)
448 tid_t tid; /* transaction id */
449 struct inode *ip = dentry->d_inode;
451 struct component_name dname; /* object name */
452 struct inode *iplist[2];
457 jfs_info("jfs_unlink: dip:0x%p name:%s", dip, dentry->d_name.name);
459 /* Init inode for quota operations. */
462 if ((rc = get_UCSname(&dname, dentry)))
467 tid = txBegin(dip->i_sb, 0);
469 down(&JFS_IP(dip)->commit_sem);
470 down(&JFS_IP(ip)->commit_sem);
476 * delete the entry of target file from parent directory
479 if ((rc = dtDelete(tid, dip, &dname, &ino, JFS_REMOVE))) {
480 jfs_err("jfs_unlink: dtDelete returned %d", rc);
482 txAbort(tid, 1); /* Marks FS Dirty */
484 up(&JFS_IP(dip)->commit_sem);
485 up(&JFS_IP(ip)->commit_sem);
492 ip->i_ctime = dip->i_ctime = dip->i_mtime = CURRENT_TIME;
493 mark_inode_dirty(dip);
495 /* update target's inode */
497 mark_inode_dirty(ip);
500 * commit zero link count object
502 if (ip->i_nlink == 0) {
503 assert(!test_cflag(COMMIT_Nolink, ip));
504 /* free block resources */
505 if ((new_size = commitZeroLink(tid, ip)) < 0) {
506 txAbort(tid, 1); /* Marks FS Dirty */
508 up(&JFS_IP(dip)->commit_sem);
509 up(&JFS_IP(ip)->commit_sem);
514 tblk = tid_to_tblock(tid);
515 tblk->xflag |= COMMIT_DELETE;
520 * Incomplete truncate of file data can
521 * result in timing problems unless we synchronously commit the
525 commit_flag = COMMIT_SYNC;
530 * If xtTruncate was incomplete, commit synchronously to avoid
531 * timing complications
533 rc = txCommit(tid, 2, &iplist[0], commit_flag);
537 up(&JFS_IP(dip)->commit_sem);
538 up(&JFS_IP(ip)->commit_sem);
541 while (new_size && (rc == 0)) {
542 tid = txBegin(dip->i_sb, 0);
543 down(&JFS_IP(ip)->commit_sem);
544 new_size = xtTruncate_pmap(tid, ip, new_size);
546 txAbort(tid, 1); /* Marks FS Dirty */
549 rc = txCommit(tid, 2, &iplist[0], COMMIT_SYNC);
551 up(&JFS_IP(ip)->commit_sem);
554 if (ip->i_nlink == 0)
555 set_cflag(COMMIT_Nolink, ip);
560 * Truncating the directory index table is not guaranteed. It
561 * may need to be done iteratively
563 if (test_cflag(COMMIT_Stale, dip)) {
565 jfs_truncate_nolock(dip, 0);
567 clear_cflag(COMMIT_Stale, dip);
571 free_UCSname(&dname);
573 jfs_info("jfs_unlink: rc:%d", rc);
578 * NAME: commitZeroLink()
580 * FUNCTION: for non-directory, called by jfs_remove(),
581 * truncate a regular file, directory or symbolic
582 * link to zero length. return 0 if type is not
585 * if the file is currently associated with a VM segment
586 * only permanent disk and inode map resources are freed,
587 * and neither the inode nor indirect blocks are modified
588 * so that the resources can be later freed in the work
590 * if there is no VM segment on entry, the resources are
591 * freed in both work and permanent map.
592 * (? for temporary file - memory object is cached even
593 * after no reference:
594 * reference count > 0 - )
596 * PARAMETERS: cd - pointer to commit data structure.
597 * current inode is the one to truncate.
599 * RETURN: Errors from subroutines
601 static s64 commitZeroLink(tid_t tid, struct inode *ip)
606 jfs_info("commitZeroLink: tid = %d, ip = 0x%p", tid, ip);
608 filetype = ip->i_mode & S_IFMT;
613 /* fast symbolic link */
614 if (ip->i_size < IDATASIZE) {
620 assert(filetype != S_IFDIR);
624 set_cflag(COMMIT_Freewmap, ip);
626 /* mark transaction of block map update type */
627 tblk = tid_to_tblock(tid);
628 tblk->xflag |= COMMIT_PMAP;
633 if (JFS_IP(ip)->ea.flag & DXD_EXTENT)
634 /* acquire maplock on EA to be freed from block map */
635 txEA(tid, ip, &JFS_IP(ip)->ea, NULL);
640 if (JFS_IP(ip)->acl.flag & DXD_EXTENT)
641 /* acquire maplock on EA to be freed from block map */
642 txEA(tid, ip, &JFS_IP(ip)->acl, NULL);
645 * free xtree/data (truncate to zero length):
646 * free xtree/data pages from cache if COMMIT_PWMAP,
647 * free xtree/data blocks from persistent block map, and
648 * free xtree/data blocks from working block map if COMMIT_PWMAP;
651 return xtTruncate_pmap(tid, ip, 0);
658 * NAME: freeZeroLink()
660 * FUNCTION: for non-directory, called by iClose(),
661 * free resources of a file from cache and WORKING map
662 * for a file previously committed with zero link count
663 * while associated with a pager object,
665 * PARAMETER: ip - pointer to inode of file.
669 int freeZeroLink(struct inode *ip)
674 jfs_info("freeZeroLink: ip = 0x%p", ip);
676 /* return if not reg or symbolic link or if size is
679 type = ip->i_mode & S_IFMT;
685 /* if its contained in inode nothing to do */
686 if (ip->i_size < IDATASIZE)
696 if (JFS_IP(ip)->ea.flag & DXD_EXTENT) {
697 s64 xaddr = addressDXD(&JFS_IP(ip)->ea);
698 int xlen = lengthDXD(&JFS_IP(ip)->ea);
699 struct maplock maplock; /* maplock for COMMIT_WMAP */
700 struct pxd_lock *pxdlock; /* maplock for COMMIT_WMAP */
702 /* free EA pages from cache */
703 invalidate_dxd_metapages(ip, JFS_IP(ip)->ea);
705 /* free EA extent from working block map */
707 pxdlock = (struct pxd_lock *) & maplock;
708 pxdlock->flag = mlckFREEPXD;
709 PXDaddress(&pxdlock->pxd, xaddr);
710 PXDlength(&pxdlock->pxd, xlen);
711 txFreeMap(ip, pxdlock, NULL, COMMIT_WMAP);
717 if (JFS_IP(ip)->acl.flag & DXD_EXTENT) {
718 s64 xaddr = addressDXD(&JFS_IP(ip)->acl);
719 int xlen = lengthDXD(&JFS_IP(ip)->acl);
720 struct maplock maplock; /* maplock for COMMIT_WMAP */
721 struct pxd_lock *pxdlock; /* maplock for COMMIT_WMAP */
723 invalidate_dxd_metapages(ip, JFS_IP(ip)->acl);
725 /* free ACL extent from working block map */
727 pxdlock = (struct pxd_lock *) & maplock;
728 pxdlock->flag = mlckFREEPXD;
729 PXDaddress(&pxdlock->pxd, xaddr);
730 PXDlength(&pxdlock->pxd, xlen);
731 txFreeMap(ip, pxdlock, NULL, COMMIT_WMAP);
735 * free xtree/data (truncate to zero length):
736 * free xtree/data pages from cache, and
737 * free xtree/data blocks from working block map;
740 rc = xtTruncate(0, ip, 0, COMMIT_WMAP);
746 * NAME: jfs_link(vp, dvp, name, crp)
748 * FUNCTION: create a link to <vp> by the name = <name>
749 * in the parent directory <dvp>
751 * PARAMETER: vp - target object
752 * dvp - parent directory of new link
753 * name - name of new link to target object
756 * RETURN: Errors from subroutines
759 * JFS does NOT support link() on directories (to prevent circular
760 * path in the directory hierarchy);
761 * EPERM: the target object is a directory, and either the caller
762 * does not have appropriate privileges or the implementation prohibits
763 * using link() on directories [XPG4.2].
765 * JFS does NOT support links between file systems:
766 * EXDEV: target object and new link are on different file systems and
767 * implementation does not support links between file systems [XPG4.2].
769 static int jfs_link(struct dentry *old_dentry,
770 struct inode *dir, struct dentry *dentry)
774 struct inode *ip = old_dentry->d_inode;
776 struct component_name dname;
777 struct btstack btstack;
778 struct inode *iplist[2];
780 jfs_info("jfs_link: %s %s", old_dentry->d_name.name,
781 dentry->d_name.name);
783 if (ip->i_nlink == JFS_LINK_MAX)
786 if (ip->i_nlink == 0)
789 tid = txBegin(ip->i_sb, 0);
791 down(&JFS_IP(dir)->commit_sem);
792 down(&JFS_IP(ip)->commit_sem);
795 * scan parent directory for entry/freespace
797 if ((rc = get_UCSname(&dname, dentry)))
800 if ((rc = dtSearch(dir, &dname, &ino, &btstack, JFS_CREATE)))
804 * create entry for new link in parent directory
807 if ((rc = dtInsert(tid, dir, &dname, &ino, &btstack)))
810 /* update object inode */
811 ip->i_nlink++; /* for new link */
812 ip->i_ctime = CURRENT_TIME;
813 mark_inode_dirty(dir);
814 atomic_inc(&ip->i_count);
818 rc = txCommit(tid, 2, &iplist[0], 0);
824 d_instantiate(dentry, ip);
827 free_UCSname(&dname);
832 up(&JFS_IP(dir)->commit_sem);
833 up(&JFS_IP(ip)->commit_sem);
835 jfs_info("jfs_link: rc:%d", rc);
840 * NAME: jfs_symlink(dip, dentry, name)
842 * FUNCTION: creates a symbolic link to <symlink> by name <name>
845 * PARAMETER: dip - parent directory vnode
846 * dentry - dentry of symbolic link
847 * name - the path name of the existing object
848 * that will be the source of the link
850 * RETURN: errors from subroutines
853 * ENAMETOOLONG: pathname resolution of a symbolic link produced
854 * an intermediate result whose length exceeds PATH_MAX [XPG4.2]
857 static int jfs_symlink(struct inode *dip, struct dentry *dentry,
863 struct component_name dname;
864 int ssize; /* source pathname size */
865 struct btstack btstack;
866 struct inode *ip = dentry->d_inode;
867 unchar *i_fastsymlink;
869 int bmask = 0, xsize;
870 s64 extent = 0, xaddr;
872 struct super_block *sb;
875 struct inode *iplist[2];
877 jfs_info("jfs_symlink: dip:0x%p name:%s", dip, name);
879 ssize = strlen(name) + 1;
882 * search parent directory for entry/freespace
883 * (dtSearch() returns parent directory page pinned)
886 if ((rc = get_UCSname(&dname, dentry)))
890 * allocate on-disk/in-memory inode for symbolic link:
891 * (iAlloc() returns new, locked inode)
893 ip = ialloc(dip, S_IFLNK | 0777);
899 tid = txBegin(dip->i_sb, 0);
901 down(&JFS_IP(dip)->commit_sem);
902 down(&JFS_IP(ip)->commit_sem);
904 tblk = tid_to_tblock(tid);
905 tblk->xflag |= COMMIT_CREATE;
906 tblk->ino = ip->i_ino;
907 tblk->u.ixpxd = JFS_IP(ip)->ixpxd;
909 /* fix symlink access permission
910 * (dir_create() ANDs in the u.u_cmask,
911 * but symlinks really need to be 777 access)
916 * write symbolic link target path name
921 * write source path name inline in on-disk inode (fast symbolic link)
924 if (ssize <= IDATASIZE) {
925 ip->i_op = &jfs_symlink_inode_operations;
927 i_fastsymlink = JFS_IP(ip)->i_inline;
928 memcpy(i_fastsymlink, name, ssize);
929 ip->i_size = ssize - 1;
932 * if symlink is > 128 bytes, we don't have the space to
933 * store inline extended attributes
935 if (ssize > sizeof (JFS_IP(ip)->i_inline))
936 JFS_IP(ip)->mode2 &= ~INLINEEA;
938 jfs_info("jfs_symlink: fast symlink added ssize:%d name:%s ",
942 * write source path name in a single extent
945 jfs_info("jfs_symlink: allocate extent ip:0x%p", ip);
947 ip->i_op = &page_symlink_inode_operations;
948 ip->i_mapping->a_ops = &jfs_aops;
951 * even though the data of symlink object (source
952 * path name) is treated as non-journaled user data,
953 * it is read/written thru buffer cache for performance.
956 bmask = JFS_SBI(sb)->bsize - 1;
957 xsize = (ssize + bmask) & ~bmask;
959 xlen = xsize >> JFS_SBI(sb)->l2bsize;
960 if ((rc = xtInsert(tid, ip, 0, 0, xlen, &xaddr, 0))) {
966 ip->i_size = ssize - 1;
968 /* This is kind of silly since PATH_MAX == 4K */
969 int copy_size = min(ssize, PSIZE);
971 mp = get_metapage(ip, xaddr, PSIZE, 1);
974 xtTruncate(tid, ip, 0, COMMIT_PWMAP);
979 memcpy(mp->data, name, copy_size);
983 xaddr += JFS_SBI(sb)->nbperpage;
988 * create entry for symbolic link in parent directory
990 rc = dtSearch(dip, &dname, &ino, &btstack, JFS_CREATE);
993 rc = dtInsert(tid, dip, &dname, &ino, &btstack);
997 xtTruncate(tid, ip, 0, COMMIT_PWMAP);
999 /* discard new inode */
1003 insert_inode_hash(ip);
1004 mark_inode_dirty(ip);
1007 * commit update of parent directory and link object
1012 rc = txCommit(tid, 2, &iplist[0], 0);
1016 up(&JFS_IP(dip)->commit_sem);
1017 up(&JFS_IP(ip)->commit_sem);
1022 d_instantiate(dentry, ip);
1025 free_UCSname(&dname);
1027 #ifdef CONFIG_JFS_POSIX_ACL
1029 jfs_init_acl(ip, dip);
1033 jfs_info("jfs_symlink: rc:%d", rc);
1041 * FUNCTION: rename a file or directory
1043 static int jfs_rename(struct inode *old_dir, struct dentry *old_dentry,
1044 struct inode *new_dir, struct dentry *new_dentry)
1046 struct btstack btstack;
1048 struct component_name new_dname;
1049 struct inode *new_ip;
1050 struct component_name old_dname;
1051 struct inode *old_ip;
1055 struct dt_lock *dtlck;
1058 struct inode *iplist[4];
1059 struct tblock *tblk;
1064 jfs_info("jfs_rename: %s %s", old_dentry->d_name.name,
1065 new_dentry->d_name.name);
1067 old_ip = old_dentry->d_inode;
1068 new_ip = new_dentry->d_inode;
1070 if ((rc = get_UCSname(&old_dname, old_dentry)))
1073 if ((rc = get_UCSname(&new_dname, new_dentry)))
1077 * Make sure source inode number is what we think it is
1079 rc = dtSearch(old_dir, &old_dname, &ino, &btstack, JFS_LOOKUP);
1080 if (rc || (ino != old_ip->i_ino)) {
1086 * Make sure dest inode number (if any) is what we think it is
1088 rc = dtSearch(new_dir, &new_dname, &ino, &btstack, JFS_LOOKUP);
1090 if ((new_ip == 0) || (ino != new_ip->i_ino)) {
1094 } else if (rc != -ENOENT)
1097 /* no entry exists, but one was expected */
1102 if (S_ISDIR(old_ip->i_mode)) {
1104 if (!dtEmpty(new_ip)) {
1108 } else if ((new_dir != old_dir) &&
1109 (new_dir->i_nlink == JFS_LINK_MAX)) {
1113 } else if (new_ip) {
1114 IWRITE_LOCK(new_ip);
1115 /* Init inode for quota operations. */
1120 * The real work starts here
1122 tid = txBegin(new_dir->i_sb, 0);
1124 down(&JFS_IP(new_dir)->commit_sem);
1125 down(&JFS_IP(old_ip)->commit_sem);
1126 if (old_dir != new_dir)
1127 down(&JFS_IP(old_dir)->commit_sem);
1130 down(&JFS_IP(new_ip)->commit_sem);
1132 * Change existing directory entry to new inode number
1134 ino = new_ip->i_ino;
1135 rc = dtModify(tid, new_dir, &new_dname, &ino,
1136 old_ip->i_ino, JFS_RENAME);
1140 if (S_ISDIR(new_ip->i_mode)) {
1142 if (new_ip->i_nlink) {
1143 up(&JFS_IP(new_dir)->commit_sem);
1144 up(&JFS_IP(old_ip)->commit_sem);
1145 if (old_dir != new_dir)
1146 up(&JFS_IP(old_dir)->commit_sem);
1147 if (!S_ISDIR(old_ip->i_mode) && new_ip)
1148 IWRITE_UNLOCK(new_ip);
1149 jfs_error(new_ip->i_sb,
1150 "jfs_rename: new_ip->i_nlink != 0");
1153 tblk = tid_to_tblock(tid);
1154 tblk->xflag |= COMMIT_DELETE;
1155 tblk->u.ip = new_ip;
1156 } else if (new_ip->i_nlink == 0) {
1157 assert(!test_cflag(COMMIT_Nolink, new_ip));
1158 /* free block resources */
1159 if ((new_size = commitZeroLink(tid, new_ip)) < 0) {
1160 txAbort(tid, 1); /* Marks FS Dirty */
1164 tblk = tid_to_tblock(tid);
1165 tblk->xflag |= COMMIT_DELETE;
1166 tblk->u.ip = new_ip;
1168 new_ip->i_ctime = CURRENT_TIME;
1169 mark_inode_dirty(new_ip);
1173 * Add new directory entry
1175 rc = dtSearch(new_dir, &new_dname, &ino, &btstack,
1178 jfs_err("jfs_rename didn't expect dtSearch to fail "
1183 ino = old_ip->i_ino;
1184 rc = dtInsert(tid, new_dir, &new_dname, &ino, &btstack);
1187 jfs_err("jfs_rename: dtInsert returned -EIO");
1190 if (S_ISDIR(old_ip->i_mode))
1194 * Remove old directory entry
1197 ino = old_ip->i_ino;
1198 rc = dtDelete(tid, old_dir, &old_dname, &ino, JFS_REMOVE);
1200 jfs_err("jfs_rename did not expect dtDelete to return rc = %d",
1202 txAbort(tid, 1); /* Marks Filesystem dirty */
1205 if (S_ISDIR(old_ip->i_mode)) {
1207 if (old_dir != new_dir) {
1209 * Change inode number of parent for moved directory
1212 JFS_IP(old_ip)->i_dtroot.header.idotdot =
1213 cpu_to_le32(new_dir->i_ino);
1215 /* Linelock header of dtree */
1216 tlck = txLock(tid, old_ip,
1217 (struct metapage *) &JFS_IP(old_ip)->bxflag,
1218 tlckDTREE | tlckBTROOT | tlckRELINK);
1219 dtlck = (struct dt_lock *) & tlck->lock;
1220 ASSERT(dtlck->index == 0);
1221 lv = & dtlck->lv[0];
1229 * Update ctime on changed/moved inodes & mark dirty
1231 old_ip->i_ctime = CURRENT_TIME;
1232 mark_inode_dirty(old_ip);
1234 new_dir->i_ctime = new_dir->i_mtime = current_fs_time(new_dir->i_sb);
1235 mark_inode_dirty(new_dir);
1237 /* Build list of inodes modified by this transaction */
1239 iplist[ipcount++] = old_ip;
1241 iplist[ipcount++] = new_ip;
1242 iplist[ipcount++] = old_dir;
1244 if (old_dir != new_dir) {
1245 iplist[ipcount++] = new_dir;
1246 old_dir->i_ctime = old_dir->i_mtime = CURRENT_TIME;
1247 mark_inode_dirty(old_dir);
1251 * Incomplete truncate of file data can
1252 * result in timing problems unless we synchronously commit the
1256 commit_flag = COMMIT_SYNC;
1260 rc = txCommit(tid, ipcount, iplist, commit_flag);
1265 up(&JFS_IP(new_dir)->commit_sem);
1266 up(&JFS_IP(old_ip)->commit_sem);
1267 if (old_dir != new_dir)
1268 up(&JFS_IP(old_dir)->commit_sem);
1270 up(&JFS_IP(new_ip)->commit_sem);
1272 while (new_size && (rc == 0)) {
1273 tid = txBegin(new_ip->i_sb, 0);
1274 down(&JFS_IP(new_ip)->commit_sem);
1275 new_size = xtTruncate_pmap(tid, new_ip, new_size);
1280 rc = txCommit(tid, 1, &new_ip, COMMIT_SYNC);
1282 up(&JFS_IP(new_ip)->commit_sem);
1284 if (new_ip && (new_ip->i_nlink == 0))
1285 set_cflag(COMMIT_Nolink, new_ip);
1287 free_UCSname(&new_dname);
1289 free_UCSname(&old_dname);
1291 if (new_ip && !S_ISDIR(new_ip->i_mode))
1292 IWRITE_UNLOCK(new_ip);
1294 * Truncating the directory index table is not guaranteed. It
1295 * may need to be done iteratively
1297 if (test_cflag(COMMIT_Stale, old_dir)) {
1298 if (old_dir->i_size > 1)
1299 jfs_truncate_nolock(old_dir, 0);
1301 clear_cflag(COMMIT_Stale, old_dir);
1304 jfs_info("jfs_rename: returning %d", rc);
1312 * FUNCTION: Create a special file (device)
1314 static int jfs_mknod(struct inode *dir, struct dentry *dentry,
1315 int mode, dev_t rdev)
1317 struct jfs_inode_info *jfs_ip;
1318 struct btstack btstack;
1319 struct component_name dname;
1322 struct inode *iplist[2];
1325 struct tblock *tblk;
1327 if (!new_valid_dev(rdev))
1330 jfs_info("jfs_mknod: %s", dentry->d_name.name);
1332 if ((rc = get_UCSname(&dname, dentry)))
1335 ip = ialloc(dir, mode);
1340 jfs_ip = JFS_IP(ip);
1342 tid = txBegin(dir->i_sb, 0);
1344 down(&JFS_IP(dir)->commit_sem);
1345 down(&JFS_IP(ip)->commit_sem);
1347 if ((rc = dtSearch(dir, &dname, &ino, &btstack, JFS_CREATE)))
1350 tblk = tid_to_tblock(tid);
1351 tblk->xflag |= COMMIT_CREATE;
1352 tblk->ino = ip->i_ino;
1353 tblk->u.ixpxd = JFS_IP(ip)->ixpxd;
1356 if ((rc = dtInsert(tid, dir, &dname, &ino, &btstack)))
1359 ip->i_op = &jfs_file_inode_operations;
1360 jfs_ip->dev = new_encode_dev(rdev);
1361 init_special_inode(ip, ip->i_mode, rdev);
1363 insert_inode_hash(ip);
1364 mark_inode_dirty(ip);
1366 dir->i_ctime = dir->i_mtime = CURRENT_TIME;
1368 mark_inode_dirty(dir);
1372 rc = txCommit(tid, 2, iplist, 0);
1376 up(&JFS_IP(ip)->commit_sem);
1377 up(&JFS_IP(dir)->commit_sem);
1382 d_instantiate(dentry, ip);
1385 free_UCSname(&dname);
1387 #ifdef CONFIG_JFS_POSIX_ACL
1389 jfs_init_acl(ip, dir);
1393 jfs_info("jfs_mknod: returning %d", rc);
1397 static struct dentry *jfs_lookup(struct inode *dip, struct dentry *dentry, struct nameidata *nd)
1399 struct btstack btstack;
1402 struct component_name key;
1403 const char *name = dentry->d_name.name;
1404 int len = dentry->d_name.len;
1407 jfs_info("jfs_lookup: name = %s", name);
1410 if ((name[0] == '.') && (len == 1))
1412 else if (strcmp(name, "..") == 0)
1415 if ((rc = get_UCSname(&key, dentry)))
1417 rc = dtSearch(dip, &key, &inum, &btstack, JFS_LOOKUP);
1419 if (rc == -ENOENT) {
1420 d_add(dentry, NULL);
1423 jfs_err("jfs_lookup: dtSearch returned %d", rc);
1428 ip = iget(dip->i_sb, inum);
1429 if (ip == NULL || is_bad_inode(ip)) {
1430 jfs_err("jfs_lookup: iget failed on inum %d", (uint) inum);
1433 return ERR_PTR(-EACCES);
1436 if (JFS_SBI(dip->i_sb)->mntflag & JFS_OS2)
1437 dentry->d_op = &jfs_ci_dentry_operations;
1439 dentry = d_splice_alias(ip, dentry);
1441 if (dentry && (JFS_SBI(dip->i_sb)->mntflag & JFS_OS2))
1442 dentry->d_op = &jfs_ci_dentry_operations;
1447 struct dentry *jfs_get_parent(struct dentry *dentry)
1449 struct super_block *sb = dentry->d_inode->i_sb;
1450 struct dentry *parent = ERR_PTR(-ENOENT);
1451 struct inode *inode;
1452 unsigned long parent_ino;
1455 le32_to_cpu(JFS_IP(dentry->d_inode)->i_dtroot.header.idotdot);
1456 inode = iget(sb, parent_ino);
1458 if (is_bad_inode(inode)) {
1460 parent = ERR_PTR(-EACCES);
1462 parent = d_alloc_anon(inode);
1464 parent = ERR_PTR(-ENOMEM);
1473 struct inode_operations jfs_dir_inode_operations = {
1474 .create = jfs_create,
1475 .lookup = jfs_lookup,
1477 .unlink = jfs_unlink,
1478 .symlink = jfs_symlink,
1482 .rename = jfs_rename,
1483 .setxattr = jfs_setxattr,
1484 .getxattr = jfs_getxattr,
1485 .listxattr = jfs_listxattr,
1486 .removexattr = jfs_removexattr,
1487 #ifdef CONFIG_JFS_POSIX_ACL
1488 .setattr = jfs_setattr,
1489 .permission = jfs_permission,
1493 struct file_operations jfs_dir_operations = {
1494 .read = generic_read_dir,
1495 .readdir = jfs_readdir,
1499 static int jfs_ci_hash(struct dentry *dir, struct qstr *this)
1504 hash = init_name_hash();
1505 for (i=0; i < this->len; i++)
1506 hash = partial_name_hash(tolower(this->name[i]), hash);
1507 this->hash = end_name_hash(hash);
1512 static int jfs_ci_compare(struct dentry *dir, struct qstr *a, struct qstr *b)
1516 if (a->len != b->len)
1518 for (i=0; i < a->len; i++) {
1519 if (tolower(a->name[i]) != tolower(b->name[i]))
1525 * We want creates to preserve case. A negative dentry, a, that
1526 * has a different case than b may cause a new entry to be created
1527 * with the wrong case. Since we can't tell if a comes from a negative
1528 * dentry, we blindly replace it with b. This should be harmless if
1529 * a is not a negative dentry.
1531 memcpy((unsigned char *)a->name, b->name, a->len);
1536 struct dentry_operations jfs_ci_dentry_operations =
1538 .d_hash = jfs_ci_hash,
1539 .d_compare = jfs_ci_compare,