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