2 * Copyright (C) International Business Machines Corp., 2000-2004
3 * Portions Copyright (C) Christoph Hellwig, 2001-2002
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation; either version 2 of the License, or
8 * (at your option) any later version.
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
13 * the GNU General Public License for more details.
15 * You should have received a copy of the GNU General Public License
16 * along with this program; if not, write to the Free Software
17 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
21 #include <linux/ctype.h>
22 #include <linux/quotaops.h>
23 #include "jfs_incore.h"
24 #include "jfs_superblock.h"
25 #include "jfs_inode.h"
26 #include "jfs_dinode.h"
28 #include "jfs_unicode.h"
29 #include "jfs_metapage.h"
30 #include "jfs_xattr.h"
32 #include "jfs_debug.h"
37 struct dentry_operations jfs_ci_dentry_operations;
39 static s64 commitZeroLink(tid_t, struct inode *);
42 * NAME: free_ea_wmap(inode)
44 * FUNCTION: free uncommitted extended attributes from working map
47 static inline void free_ea_wmap(struct inode *inode)
49 dxd_t *ea = &JFS_IP(inode)->ea;
51 if (ea->flag & DXD_EXTENT) {
52 /* free EA pages from cache */
53 invalidate_dxd_metapages(inode, *ea);
54 dbFree(inode, addressDXD(ea), lengthDXD(ea));
60 * NAME: jfs_create(dip, dentry, mode)
62 * FUNCTION: create a regular file in the parent directory <dip>
63 * with name = <from dentry> and mode = <mode>
65 * PARAMETER: dip - parent directory vnode
66 * dentry - dentry of new file
67 * mode - create mode (rwxrwxrwx).
70 * RETURN: Errors from subroutines
73 static int jfs_create(struct inode *dip, struct dentry *dentry, int mode,
77 tid_t tid; /* transaction id */
78 struct inode *ip = NULL; /* child directory inode */
80 struct component_name dname; /* child directory name */
81 struct btstack btstack;
82 struct inode *iplist[2];
85 jfs_info("jfs_create: dip:0x%p name:%s", dip, dentry->d_name.name);
88 * search parent directory for entry/freespace
89 * (dtSearch() returns parent directory page pinned)
91 if ((rc = get_UCSname(&dname, dentry)))
95 * Either iAlloc() or txBegin() may block. Deadlock can occur if we
96 * block there while holding dtree page, so we allocate the inode &
97 * begin the transaction before we search the directory.
99 ip = ialloc(dip, mode);
105 tid = txBegin(dip->i_sb, 0);
107 mutex_lock(&JFS_IP(dip)->commit_mutex);
108 mutex_lock(&JFS_IP(ip)->commit_mutex);
110 rc = jfs_init_acl(tid, ip, dip);
114 rc = jfs_init_security(tid, ip, dip);
120 if ((rc = dtSearch(dip, &dname, &ino, &btstack, JFS_CREATE))) {
121 jfs_err("jfs_create: dtSearch returned %d", rc);
126 tblk = tid_to_tblock(tid);
127 tblk->xflag |= COMMIT_CREATE;
128 tblk->ino = ip->i_ino;
129 tblk->u.ixpxd = JFS_IP(ip)->ixpxd;
135 * initialize the child XAD tree root in-line in inode
140 * create entry in parent directory for child directory
141 * (dtInsert() releases parent directory page)
144 if ((rc = dtInsert(tid, dip, &dname, &ino, &btstack))) {
146 jfs_err("jfs_create: dtInsert returned -EIO");
147 txAbort(tid, 1); /* Marks Filesystem dirty */
149 txAbort(tid, 0); /* Filesystem full */
153 ip->i_op = &jfs_file_inode_operations;
154 ip->i_fop = &jfs_file_operations;
155 ip->i_mapping->a_ops = &jfs_aops;
157 insert_inode_hash(ip);
158 mark_inode_dirty(ip);
160 dip->i_ctime = dip->i_mtime = CURRENT_TIME;
162 mark_inode_dirty(dip);
164 rc = txCommit(tid, 2, &iplist[0], 0);
168 mutex_unlock(&JFS_IP(ip)->commit_mutex);
169 mutex_unlock(&JFS_IP(dip)->commit_mutex);
175 d_instantiate(dentry, ip);
178 free_UCSname(&dname);
182 jfs_info("jfs_create: rc:%d", rc);
188 * NAME: jfs_mkdir(dip, dentry, mode)
190 * FUNCTION: create a child directory in the parent directory <dip>
191 * with name = <from dentry> and mode = <mode>
193 * PARAMETER: dip - parent directory vnode
194 * dentry - dentry of child directory
195 * mode - create mode (rwxrwxrwx).
197 * RETURN: Errors from subroutines
200 * EACCESS: user needs search+write permission on the parent directory
202 static int jfs_mkdir(struct inode *dip, struct dentry *dentry, int mode)
205 tid_t tid; /* transaction id */
206 struct inode *ip = NULL; /* child directory inode */
208 struct component_name dname; /* child directory name */
209 struct btstack btstack;
210 struct inode *iplist[2];
213 jfs_info("jfs_mkdir: dip:0x%p name:%s", dip, dentry->d_name.name);
215 /* link count overflow on parent directory ? */
216 if (dip->i_nlink == JFS_LINK_MAX) {
222 * search parent directory for entry/freespace
223 * (dtSearch() returns parent directory page pinned)
225 if ((rc = get_UCSname(&dname, dentry)))
229 * Either iAlloc() or txBegin() may block. Deadlock can occur if we
230 * block there while holding dtree page, so we allocate the inode &
231 * begin the transaction before we search the directory.
233 ip = ialloc(dip, S_IFDIR | mode);
239 tid = txBegin(dip->i_sb, 0);
241 mutex_lock(&JFS_IP(dip)->commit_mutex);
242 mutex_lock(&JFS_IP(ip)->commit_mutex);
244 rc = jfs_init_acl(tid, ip, dip);
248 rc = jfs_init_security(tid, ip, dip);
254 if ((rc = dtSearch(dip, &dname, &ino, &btstack, JFS_CREATE))) {
255 jfs_err("jfs_mkdir: dtSearch returned %d", rc);
260 tblk = tid_to_tblock(tid);
261 tblk->xflag |= COMMIT_CREATE;
262 tblk->ino = ip->i_ino;
263 tblk->u.ixpxd = JFS_IP(ip)->ixpxd;
269 * initialize the child directory in-line in inode
271 dtInitRoot(tid, ip, dip->i_ino);
274 * create entry in parent directory for child directory
275 * (dtInsert() releases parent directory page)
278 if ((rc = dtInsert(tid, dip, &dname, &ino, &btstack))) {
280 jfs_err("jfs_mkdir: dtInsert returned -EIO");
281 txAbort(tid, 1); /* Marks Filesystem dirty */
283 txAbort(tid, 0); /* Filesystem full */
287 ip->i_nlink = 2; /* for '.' */
288 ip->i_op = &jfs_dir_inode_operations;
289 ip->i_fop = &jfs_dir_operations;
291 insert_inode_hash(ip);
292 mark_inode_dirty(ip);
294 /* update parent directory inode */
295 dip->i_nlink++; /* for '..' from child directory */
296 dip->i_ctime = dip->i_mtime = CURRENT_TIME;
297 mark_inode_dirty(dip);
299 rc = txCommit(tid, 2, &iplist[0], 0);
303 mutex_unlock(&JFS_IP(ip)->commit_mutex);
304 mutex_unlock(&JFS_IP(dip)->commit_mutex);
310 d_instantiate(dentry, ip);
313 free_UCSname(&dname);
318 jfs_info("jfs_mkdir: rc:%d", rc);
323 * NAME: jfs_rmdir(dip, dentry)
325 * FUNCTION: remove a link to child directory
327 * PARAMETER: dip - parent inode
328 * dentry - child directory dentry
330 * RETURN: -EINVAL - if name is . or ..
331 * -EINVAL - if . or .. exist but are invalid.
332 * errors from subroutines
335 * if other threads have the directory open when the last link
336 * is removed, the "." and ".." entries, if present, are removed before
337 * rmdir() returns and no new entries may be created in the directory,
338 * but the directory is not removed until the last reference to
339 * the directory is released (cf.unlink() of regular file).
341 static int jfs_rmdir(struct inode *dip, struct dentry *dentry)
344 tid_t tid; /* transaction id */
345 struct inode *ip = dentry->d_inode;
347 struct component_name dname;
348 struct inode *iplist[2];
351 jfs_info("jfs_rmdir: dip:0x%p name:%s", dip, dentry->d_name.name);
353 /* Init inode for quota operations. */
356 /* directory must be empty to be removed */
362 if ((rc = get_UCSname(&dname, dentry))) {
366 tid = txBegin(dip->i_sb, 0);
368 mutex_lock(&JFS_IP(dip)->commit_mutex);
369 mutex_lock(&JFS_IP(ip)->commit_mutex);
374 tblk = tid_to_tblock(tid);
375 tblk->xflag |= COMMIT_DELETE;
379 * delete the entry of target directory from parent directory
382 if ((rc = dtDelete(tid, dip, &dname, &ino, JFS_REMOVE))) {
383 jfs_err("jfs_rmdir: dtDelete returned %d", rc);
387 mutex_unlock(&JFS_IP(ip)->commit_mutex);
388 mutex_unlock(&JFS_IP(dip)->commit_mutex);
393 /* update parent directory's link count corresponding
394 * to ".." entry of the target directory deleted
397 dip->i_ctime = dip->i_mtime = CURRENT_TIME;
398 mark_inode_dirty(dip);
401 * OS/2 could have created EA and/or ACL
403 /* free EA from both persistent and working map */
404 if (JFS_IP(ip)->ea.flag & DXD_EXTENT) {
406 txEA(tid, ip, &JFS_IP(ip)->ea, NULL);
408 JFS_IP(ip)->ea.flag = 0;
410 /* free ACL from both persistent and working map */
411 if (JFS_IP(ip)->acl.flag & DXD_EXTENT) {
413 txEA(tid, ip, &JFS_IP(ip)->acl, NULL);
415 JFS_IP(ip)->acl.flag = 0;
417 /* mark the target directory as deleted */
419 mark_inode_dirty(ip);
421 rc = txCommit(tid, 2, &iplist[0], 0);
425 mutex_unlock(&JFS_IP(ip)->commit_mutex);
426 mutex_unlock(&JFS_IP(dip)->commit_mutex);
429 * Truncating the directory index table is not guaranteed. It
430 * may need to be done iteratively
432 if (test_cflag(COMMIT_Stale, dip)) {
434 jfs_truncate_nolock(dip, 0);
436 clear_cflag(COMMIT_Stale, dip);
440 free_UCSname(&dname);
443 jfs_info("jfs_rmdir: rc:%d", rc);
448 * NAME: jfs_unlink(dip, dentry)
450 * FUNCTION: remove a link to object <vp> named by <name>
451 * from parent directory <dvp>
453 * PARAMETER: dip - inode of parent directory
454 * dentry - dentry of object to be removed
456 * RETURN: errors from subroutines
459 * temporary file: if one or more processes have the file open
460 * when the last link is removed, the link will be removed before
461 * unlink() returns, but the removal of the file contents will be
462 * postponed until all references to the files are closed.
464 * JFS does NOT support unlink() on directories.
467 static int jfs_unlink(struct inode *dip, struct dentry *dentry)
470 tid_t tid; /* transaction id */
471 struct inode *ip = dentry->d_inode;
473 struct component_name dname; /* object name */
474 struct inode *iplist[2];
479 jfs_info("jfs_unlink: dip:0x%p name:%s", dip, dentry->d_name.name);
481 /* Init inode for quota operations. */
484 if ((rc = get_UCSname(&dname, dentry)))
489 tid = txBegin(dip->i_sb, 0);
491 mutex_lock(&JFS_IP(dip)->commit_mutex);
492 mutex_lock(&JFS_IP(ip)->commit_mutex);
498 * delete the entry of target file from parent directory
501 if ((rc = dtDelete(tid, dip, &dname, &ino, JFS_REMOVE))) {
502 jfs_err("jfs_unlink: dtDelete returned %d", rc);
504 txAbort(tid, 1); /* Marks FS Dirty */
506 mutex_unlock(&JFS_IP(ip)->commit_mutex);
507 mutex_unlock(&JFS_IP(dip)->commit_mutex);
514 ip->i_ctime = dip->i_ctime = dip->i_mtime = CURRENT_TIME;
515 mark_inode_dirty(dip);
517 /* update target's inode */
519 mark_inode_dirty(ip);
522 * commit zero link count object
524 if (ip->i_nlink == 0) {
525 assert(!test_cflag(COMMIT_Nolink, ip));
526 /* free block resources */
527 if ((new_size = commitZeroLink(tid, ip)) < 0) {
528 txAbort(tid, 1); /* Marks FS Dirty */
530 mutex_unlock(&JFS_IP(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 = old_dentry->d_inode;
792 struct component_name dname;
793 struct btstack btstack;
794 struct inode *iplist[2];
796 jfs_info("jfs_link: %s %s", old_dentry->d_name.name,
797 dentry->d_name.name);
799 if (ip->i_nlink == JFS_LINK_MAX)
802 if (ip->i_nlink == 0)
805 tid = txBegin(ip->i_sb, 0);
807 mutex_lock(&JFS_IP(dir)->commit_mutex);
808 mutex_lock(&JFS_IP(ip)->commit_mutex);
811 * scan parent directory for entry/freespace
813 if ((rc = get_UCSname(&dname, dentry)))
816 if ((rc = dtSearch(dir, &dname, &ino, &btstack, JFS_CREATE)))
820 * create entry for new link in parent directory
823 if ((rc = dtInsert(tid, dir, &dname, &ino, &btstack)))
826 /* update object inode */
827 ip->i_nlink++; /* for new link */
828 ip->i_ctime = CURRENT_TIME;
829 dir->i_ctime = dir->i_mtime = CURRENT_TIME;
830 mark_inode_dirty(dir);
831 atomic_inc(&ip->i_count);
835 rc = txCommit(tid, 2, &iplist[0], 0);
841 d_instantiate(dentry, ip);
844 free_UCSname(&dname);
849 mutex_unlock(&JFS_IP(ip)->commit_mutex);
850 mutex_unlock(&JFS_IP(dir)->commit_mutex);
852 jfs_info("jfs_link: rc:%d", rc);
857 * NAME: jfs_symlink(dip, dentry, name)
859 * FUNCTION: creates a symbolic link to <symlink> by name <name>
862 * PARAMETER: dip - parent directory vnode
863 * dentry - dentry of symbolic link
864 * name - the path name of the existing object
865 * that will be the source of the link
867 * RETURN: errors from subroutines
870 * ENAMETOOLONG: pathname resolution of a symbolic link produced
871 * an intermediate result whose length exceeds PATH_MAX [XPG4.2]
874 static int jfs_symlink(struct inode *dip, struct dentry *dentry,
880 struct component_name dname;
881 int ssize; /* source pathname size */
882 struct btstack btstack;
883 struct inode *ip = dentry->d_inode;
884 unchar *i_fastsymlink;
886 int bmask = 0, xsize;
887 s64 extent = 0, xaddr;
889 struct super_block *sb;
892 struct inode *iplist[2];
894 jfs_info("jfs_symlink: dip:0x%p name:%s", dip, name);
896 ssize = strlen(name) + 1;
899 * search parent directory for entry/freespace
900 * (dtSearch() returns parent directory page pinned)
903 if ((rc = get_UCSname(&dname, dentry)))
907 * allocate on-disk/in-memory inode for symbolic link:
908 * (iAlloc() returns new, locked inode)
910 ip = ialloc(dip, S_IFLNK | 0777);
916 tid = txBegin(dip->i_sb, 0);
918 mutex_lock(&JFS_IP(dip)->commit_mutex);
919 mutex_lock(&JFS_IP(ip)->commit_mutex);
921 rc = jfs_init_security(tid, ip, dip);
925 tblk = tid_to_tblock(tid);
926 tblk->xflag |= COMMIT_CREATE;
927 tblk->ino = ip->i_ino;
928 tblk->u.ixpxd = JFS_IP(ip)->ixpxd;
930 /* fix symlink access permission
931 * (dir_create() ANDs in the u.u_cmask,
932 * but symlinks really need to be 777 access)
937 * write symbolic link target path name
942 * write source path name inline in on-disk inode (fast symbolic link)
945 if (ssize <= IDATASIZE) {
946 ip->i_op = &jfs_symlink_inode_operations;
948 i_fastsymlink = JFS_IP(ip)->i_inline;
949 memcpy(i_fastsymlink, name, ssize);
950 ip->i_size = ssize - 1;
953 * if symlink is > 128 bytes, we don't have the space to
954 * store inline extended attributes
956 if (ssize > sizeof (JFS_IP(ip)->i_inline))
957 JFS_IP(ip)->mode2 &= ~INLINEEA;
959 jfs_info("jfs_symlink: fast symlink added ssize:%d name:%s ",
963 * write source path name in a single extent
966 jfs_info("jfs_symlink: allocate extent ip:0x%p", ip);
968 ip->i_op = &page_symlink_inode_operations;
969 ip->i_mapping->a_ops = &jfs_aops;
972 * even though the data of symlink object (source
973 * path name) is treated as non-journaled user data,
974 * it is read/written thru buffer cache for performance.
977 bmask = JFS_SBI(sb)->bsize - 1;
978 xsize = (ssize + bmask) & ~bmask;
980 xlen = xsize >> JFS_SBI(sb)->l2bsize;
981 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 insert_inode_hash(ip);
1025 mark_inode_dirty(ip);
1027 dip->i_ctime = dip->i_mtime = CURRENT_TIME;
1028 mark_inode_dirty(dip);
1030 * commit update of parent directory and link object
1035 rc = txCommit(tid, 2, &iplist[0], 0);
1039 mutex_unlock(&JFS_IP(ip)->commit_mutex);
1040 mutex_unlock(&JFS_IP(dip)->commit_mutex);
1046 d_instantiate(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 inode *old_dir, struct dentry *old_dentry,
1063 struct inode *new_dir, struct dentry *new_dentry)
1065 struct btstack btstack;
1067 struct component_name new_dname;
1068 struct inode *new_ip;
1069 struct component_name old_dname;
1070 struct inode *old_ip;
1074 struct dt_lock *dtlck;
1077 struct inode *iplist[4];
1078 struct tblock *tblk;
1083 jfs_info("jfs_rename: %s %s", old_dentry->d_name.name,
1084 new_dentry->d_name.name);
1086 old_ip = old_dentry->d_inode;
1087 new_ip = new_dentry->d_inode;
1089 if ((rc = get_UCSname(&old_dname, old_dentry)))
1092 if ((rc = get_UCSname(&new_dname, new_dentry)))
1096 * Make sure source inode number is what we think it is
1098 rc = dtSearch(old_dir, &old_dname, &ino, &btstack, JFS_LOOKUP);
1099 if (rc || (ino != old_ip->i_ino)) {
1105 * Make sure dest inode number (if any) is what we think it is
1107 rc = dtSearch(new_dir, &new_dname, &ino, &btstack, JFS_LOOKUP);
1109 if ((new_ip == 0) || (ino != new_ip->i_ino)) {
1113 } else if (rc != -ENOENT)
1116 /* no entry exists, but one was expected */
1121 if (S_ISDIR(old_ip->i_mode)) {
1123 if (!dtEmpty(new_ip)) {
1127 } else if ((new_dir != old_dir) &&
1128 (new_dir->i_nlink == JFS_LINK_MAX)) {
1132 } else if (new_ip) {
1133 IWRITE_LOCK(new_ip);
1134 /* Init inode for quota operations. */
1139 * The real work starts here
1141 tid = txBegin(new_dir->i_sb, 0);
1143 mutex_lock(&JFS_IP(new_dir)->commit_mutex);
1144 mutex_lock(&JFS_IP(old_ip)->commit_mutex);
1145 if (old_dir != new_dir)
1146 mutex_lock(&JFS_IP(old_dir)->commit_mutex);
1149 mutex_lock(&JFS_IP(new_ip)->commit_mutex);
1151 * Change existing directory entry to new inode number
1153 ino = new_ip->i_ino;
1154 rc = dtModify(tid, new_dir, &new_dname, &ino,
1155 old_ip->i_ino, JFS_RENAME);
1159 if (S_ISDIR(new_ip->i_mode)) {
1161 if (new_ip->i_nlink) {
1162 mutex_unlock(&JFS_IP(new_ip)->commit_mutex);
1163 if (old_dir != new_dir)
1164 mutex_unlock(&JFS_IP(old_dir)->commit_mutex);
1165 mutex_unlock(&JFS_IP(old_ip)->commit_mutex);
1166 mutex_unlock(&JFS_IP(new_dir)->commit_mutex);
1167 if (!S_ISDIR(old_ip->i_mode) && new_ip)
1168 IWRITE_UNLOCK(new_ip);
1169 jfs_error(new_ip->i_sb,
1170 "jfs_rename: new_ip->i_nlink != 0");
1173 tblk = tid_to_tblock(tid);
1174 tblk->xflag |= COMMIT_DELETE;
1175 tblk->u.ip = new_ip;
1176 } else if (new_ip->i_nlink == 0) {
1177 assert(!test_cflag(COMMIT_Nolink, new_ip));
1178 /* free block resources */
1179 if ((new_size = commitZeroLink(tid, new_ip)) < 0) {
1180 txAbort(tid, 1); /* Marks FS Dirty */
1184 tblk = tid_to_tblock(tid);
1185 tblk->xflag |= COMMIT_DELETE;
1186 tblk->u.ip = new_ip;
1188 new_ip->i_ctime = CURRENT_TIME;
1189 mark_inode_dirty(new_ip);
1193 * Add new directory entry
1195 rc = dtSearch(new_dir, &new_dname, &ino, &btstack,
1198 jfs_err("jfs_rename didn't expect dtSearch to fail "
1203 ino = old_ip->i_ino;
1204 rc = dtInsert(tid, new_dir, &new_dname, &ino, &btstack);
1207 jfs_err("jfs_rename: dtInsert returned -EIO");
1210 if (S_ISDIR(old_ip->i_mode))
1214 * Remove old directory entry
1217 ino = old_ip->i_ino;
1218 rc = dtDelete(tid, old_dir, &old_dname, &ino, JFS_REMOVE);
1220 jfs_err("jfs_rename did not expect dtDelete to return rc = %d",
1222 txAbort(tid, 1); /* Marks Filesystem dirty */
1225 if (S_ISDIR(old_ip->i_mode)) {
1227 if (old_dir != new_dir) {
1229 * Change inode number of parent for moved directory
1232 JFS_IP(old_ip)->i_dtroot.header.idotdot =
1233 cpu_to_le32(new_dir->i_ino);
1235 /* Linelock header of dtree */
1236 tlck = txLock(tid, old_ip,
1237 (struct metapage *) &JFS_IP(old_ip)->bxflag,
1238 tlckDTREE | tlckBTROOT | tlckRELINK);
1239 dtlck = (struct dt_lock *) & tlck->lock;
1240 ASSERT(dtlck->index == 0);
1241 lv = & dtlck->lv[0];
1249 * Update ctime on changed/moved inodes & mark dirty
1251 old_ip->i_ctime = CURRENT_TIME;
1252 mark_inode_dirty(old_ip);
1254 new_dir->i_ctime = new_dir->i_mtime = current_fs_time(new_dir->i_sb);
1255 mark_inode_dirty(new_dir);
1257 /* Build list of inodes modified by this transaction */
1259 iplist[ipcount++] = old_ip;
1261 iplist[ipcount++] = new_ip;
1262 iplist[ipcount++] = old_dir;
1264 if (old_dir != new_dir) {
1265 iplist[ipcount++] = new_dir;
1266 old_dir->i_ctime = old_dir->i_mtime = CURRENT_TIME;
1267 mark_inode_dirty(old_dir);
1271 * Incomplete truncate of file data can
1272 * result in timing problems unless we synchronously commit the
1276 commit_flag = COMMIT_SYNC;
1280 rc = txCommit(tid, ipcount, iplist, commit_flag);
1285 mutex_unlock(&JFS_IP(new_ip)->commit_mutex);
1286 if (old_dir != new_dir)
1287 mutex_unlock(&JFS_IP(old_dir)->commit_mutex);
1288 mutex_unlock(&JFS_IP(old_ip)->commit_mutex);
1289 mutex_unlock(&JFS_IP(new_dir)->commit_mutex);
1291 while (new_size && (rc == 0)) {
1292 tid = txBegin(new_ip->i_sb, 0);
1293 mutex_lock(&JFS_IP(new_ip)->commit_mutex);
1294 new_size = xtTruncate_pmap(tid, new_ip, new_size);
1299 rc = txCommit(tid, 1, &new_ip, COMMIT_SYNC);
1301 mutex_unlock(&JFS_IP(new_ip)->commit_mutex);
1303 if (new_ip && (new_ip->i_nlink == 0))
1304 set_cflag(COMMIT_Nolink, new_ip);
1306 free_UCSname(&new_dname);
1308 free_UCSname(&old_dname);
1310 if (new_ip && !S_ISDIR(new_ip->i_mode))
1311 IWRITE_UNLOCK(new_ip);
1313 * Truncating the directory index table is not guaranteed. It
1314 * may need to be done iteratively
1316 if (test_cflag(COMMIT_Stale, old_dir)) {
1317 if (old_dir->i_size > 1)
1318 jfs_truncate_nolock(old_dir, 0);
1320 clear_cflag(COMMIT_Stale, old_dir);
1323 jfs_info("jfs_rename: returning %d", rc);
1331 * FUNCTION: Create a special file (device)
1333 static int jfs_mknod(struct inode *dir, struct dentry *dentry,
1334 int mode, dev_t rdev)
1336 struct jfs_inode_info *jfs_ip;
1337 struct btstack btstack;
1338 struct component_name dname;
1341 struct inode *iplist[2];
1344 struct tblock *tblk;
1346 if (!new_valid_dev(rdev))
1349 jfs_info("jfs_mknod: %s", dentry->d_name.name);
1351 if ((rc = get_UCSname(&dname, dentry)))
1354 ip = ialloc(dir, mode);
1359 jfs_ip = JFS_IP(ip);
1361 tid = txBegin(dir->i_sb, 0);
1363 mutex_lock(&JFS_IP(dir)->commit_mutex);
1364 mutex_lock(&JFS_IP(ip)->commit_mutex);
1366 rc = jfs_init_acl(tid, ip, dir);
1370 rc = jfs_init_security(tid, ip, dir);
1376 if ((rc = dtSearch(dir, &dname, &ino, &btstack, JFS_CREATE))) {
1381 tblk = tid_to_tblock(tid);
1382 tblk->xflag |= COMMIT_CREATE;
1383 tblk->ino = ip->i_ino;
1384 tblk->u.ixpxd = JFS_IP(ip)->ixpxd;
1387 if ((rc = dtInsert(tid, dir, &dname, &ino, &btstack))) {
1392 ip->i_op = &jfs_file_inode_operations;
1393 jfs_ip->dev = new_encode_dev(rdev);
1394 init_special_inode(ip, ip->i_mode, rdev);
1396 insert_inode_hash(ip);
1397 mark_inode_dirty(ip);
1399 dir->i_ctime = dir->i_mtime = CURRENT_TIME;
1401 mark_inode_dirty(dir);
1405 rc = txCommit(tid, 2, iplist, 0);
1409 mutex_unlock(&JFS_IP(ip)->commit_mutex);
1410 mutex_unlock(&JFS_IP(dir)->commit_mutex);
1416 d_instantiate(dentry, ip);
1419 free_UCSname(&dname);
1422 jfs_info("jfs_mknod: returning %d", rc);
1426 static struct dentry *jfs_lookup(struct inode *dip, struct dentry *dentry, struct nameidata *nd)
1428 struct btstack btstack;
1431 struct component_name key;
1432 const char *name = dentry->d_name.name;
1433 int len = dentry->d_name.len;
1436 jfs_info("jfs_lookup: name = %s", name);
1438 if (JFS_SBI(dip->i_sb)->mntflag & JFS_OS2)
1439 dentry->d_op = &jfs_ci_dentry_operations;
1441 if ((name[0] == '.') && (len == 1))
1443 else if (strcmp(name, "..") == 0)
1446 if ((rc = get_UCSname(&key, dentry)))
1448 rc = dtSearch(dip, &key, &inum, &btstack, JFS_LOOKUP);
1450 if (rc == -ENOENT) {
1451 d_add(dentry, NULL);
1454 jfs_err("jfs_lookup: dtSearch returned %d", rc);
1459 ip = iget(dip->i_sb, inum);
1460 if (ip == NULL || is_bad_inode(ip)) {
1461 jfs_err("jfs_lookup: iget failed on inum %d", (uint) inum);
1464 return ERR_PTR(-EACCES);
1467 dentry = d_splice_alias(ip, dentry);
1469 if (dentry && (JFS_SBI(dip->i_sb)->mntflag & JFS_OS2))
1470 dentry->d_op = &jfs_ci_dentry_operations;
1475 struct dentry *jfs_get_parent(struct dentry *dentry)
1477 struct super_block *sb = dentry->d_inode->i_sb;
1478 struct dentry *parent = ERR_PTR(-ENOENT);
1479 struct inode *inode;
1480 unsigned long parent_ino;
1483 le32_to_cpu(JFS_IP(dentry->d_inode)->i_dtroot.header.idotdot);
1484 inode = iget(sb, parent_ino);
1486 if (is_bad_inode(inode)) {
1488 parent = ERR_PTR(-EACCES);
1490 parent = d_alloc_anon(inode);
1492 parent = ERR_PTR(-ENOMEM);
1501 struct inode_operations jfs_dir_inode_operations = {
1502 .create = jfs_create,
1503 .lookup = jfs_lookup,
1505 .unlink = jfs_unlink,
1506 .symlink = jfs_symlink,
1510 .rename = jfs_rename,
1511 .setxattr = jfs_setxattr,
1512 .getxattr = jfs_getxattr,
1513 .listxattr = jfs_listxattr,
1514 .removexattr = jfs_removexattr,
1515 #ifdef CONFIG_JFS_POSIX_ACL
1516 .setattr = jfs_setattr,
1517 .permission = jfs_permission,
1521 const struct file_operations jfs_dir_operations = {
1522 .read = generic_read_dir,
1523 .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,