2 * JFFS2 -- Journalling Flash File System, Version 2.
4 * Copyright (C) 2001-2003 Red Hat, Inc.
6 * Created by David Woodhouse <dwmw2@infradead.org>
8 * For licensing information, see the file 'LICENCE' in this directory.
10 * $Id: dir.c,v 1.88 2005/08/17 13:46:22 dedekind Exp $
14 #include <linux/kernel.h>
15 #include <linux/slab.h>
16 #include <linux/sched.h>
18 #include <linux/crc32.h>
19 #include <linux/jffs2.h>
20 #include <linux/jffs2_fs_i.h>
21 #include <linux/jffs2_fs_sb.h>
22 #include <linux/time.h>
25 static int jffs2_readdir (struct file *, void *, filldir_t);
27 static int jffs2_create (struct inode *,struct dentry *,int,
29 static struct dentry *jffs2_lookup (struct inode *,struct dentry *,
31 static int jffs2_link (struct dentry *,struct inode *,struct dentry *);
32 static int jffs2_unlink (struct inode *,struct dentry *);
33 static int jffs2_symlink (struct inode *,struct dentry *,const char *);
34 static int jffs2_mkdir (struct inode *,struct dentry *,int);
35 static int jffs2_rmdir (struct inode *,struct dentry *);
36 static int jffs2_mknod (struct inode *,struct dentry *,int,dev_t);
37 static int jffs2_rename (struct inode *, struct dentry *,
38 struct inode *, struct dentry *);
40 struct file_operations jffs2_dir_operations =
42 .read = generic_read_dir,
43 .readdir = jffs2_readdir,
49 struct inode_operations jffs2_dir_inode_operations =
51 .create = jffs2_create,
52 .lookup = jffs2_lookup,
54 .unlink = jffs2_unlink,
55 .symlink = jffs2_symlink,
59 .rename = jffs2_rename,
60 .setattr = jffs2_setattr,
63 /***********************************************************************/
66 /* We keep the dirent list sorted in increasing order of name hash,
67 and we use the same hash function as the dentries. Makes this
70 static struct dentry *jffs2_lookup(struct inode *dir_i, struct dentry *target,
73 struct jffs2_inode_info *dir_f;
74 struct jffs2_sb_info *c;
75 struct jffs2_full_dirent *fd = NULL, *fd_list;
77 struct inode *inode = NULL;
79 D1(printk(KERN_DEBUG "jffs2_lookup()\n"));
81 dir_f = JFFS2_INODE_INFO(dir_i);
82 c = JFFS2_SB_INFO(dir_i->i_sb);
86 /* NB: The 2.2 backport will need to explicitly check for '.' and '..' here */
87 for (fd_list = dir_f->dents; fd_list && fd_list->nhash <= target->d_name.hash; fd_list = fd_list->next) {
88 if (fd_list->nhash == target->d_name.hash &&
89 (!fd || fd_list->version > fd->version) &&
90 strlen(fd_list->name) == target->d_name.len &&
91 !strncmp(fd_list->name, target->d_name.name, target->d_name.len)) {
99 inode = iget(dir_i->i_sb, ino);
101 printk(KERN_WARNING "iget() failed for ino #%u\n", ino);
102 return (ERR_PTR(-EIO));
106 d_add(target, inode);
111 /***********************************************************************/
114 static int jffs2_readdir(struct file *filp, void *dirent, filldir_t filldir)
116 struct jffs2_inode_info *f;
117 struct jffs2_sb_info *c;
118 struct inode *inode = filp->f_dentry->d_inode;
119 struct jffs2_full_dirent *fd;
120 unsigned long offset, curofs;
122 D1(printk(KERN_DEBUG "jffs2_readdir() for dir_i #%lu\n", filp->f_dentry->d_inode->i_ino));
124 f = JFFS2_INODE_INFO(inode);
125 c = JFFS2_SB_INFO(inode->i_sb);
127 offset = filp->f_pos;
130 D1(printk(KERN_DEBUG "Dirent 0: \".\", ino #%lu\n", inode->i_ino));
131 if (filldir(dirent, ".", 1, 0, inode->i_ino, DT_DIR) < 0)
136 unsigned long pino = parent_ino(filp->f_dentry);
137 D1(printk(KERN_DEBUG "Dirent 1: \"..\", ino #%lu\n", pino));
138 if (filldir(dirent, "..", 2, 1, pino, DT_DIR) < 0)
145 for (fd = f->dents; fd; fd = fd->next) {
148 /* First loop: curofs = 2; offset = 2 */
149 if (curofs < offset) {
150 D2(printk(KERN_DEBUG "Skipping dirent: \"%s\", ino #%u, type %d, because curofs %ld < offset %ld\n",
151 fd->name, fd->ino, fd->type, curofs, offset));
155 D2(printk(KERN_DEBUG "Skipping deletion dirent \"%s\"\n", fd->name));
159 D2(printk(KERN_DEBUG "Dirent %ld: \"%s\", ino #%u, type %d\n", offset, fd->name, fd->ino, fd->type));
160 if (filldir(dirent, fd->name, strlen(fd->name), offset, fd->ino, fd->type) < 0)
166 filp->f_pos = offset;
170 /***********************************************************************/
173 static int jffs2_create(struct inode *dir_i, struct dentry *dentry, int mode,
174 struct nameidata *nd)
176 struct jffs2_raw_inode *ri;
177 struct jffs2_inode_info *f, *dir_f;
178 struct jffs2_sb_info *c;
182 ri = jffs2_alloc_raw_inode();
186 c = JFFS2_SB_INFO(dir_i->i_sb);
188 D1(printk(KERN_DEBUG "jffs2_create()\n"));
190 inode = jffs2_new_inode(dir_i, mode, ri);
193 D1(printk(KERN_DEBUG "jffs2_new_inode() failed\n"));
194 jffs2_free_raw_inode(ri);
195 return PTR_ERR(inode);
198 inode->i_op = &jffs2_file_inode_operations;
199 inode->i_fop = &jffs2_file_operations;
200 inode->i_mapping->a_ops = &jffs2_file_address_operations;
201 inode->i_mapping->nrpages = 0;
203 f = JFFS2_INODE_INFO(inode);
204 dir_f = JFFS2_INODE_INFO(dir_i);
206 ret = jffs2_do_create(c, dir_f, f, ri,
207 dentry->d_name.name, dentry->d_name.len);
210 make_bad_inode(inode);
212 jffs2_free_raw_inode(ri);
216 dir_i->i_mtime = dir_i->i_ctime = ITIME(je32_to_cpu(ri->ctime));
218 jffs2_free_raw_inode(ri);
219 d_instantiate(dentry, inode);
221 D1(printk(KERN_DEBUG "jffs2_create: Created ino #%lu with mode %o, nlink %d(%d). nrpages %ld\n",
222 inode->i_ino, inode->i_mode, inode->i_nlink, f->inocache->nlink, inode->i_mapping->nrpages));
226 /***********************************************************************/
229 static int jffs2_unlink(struct inode *dir_i, struct dentry *dentry)
231 struct jffs2_sb_info *c = JFFS2_SB_INFO(dir_i->i_sb);
232 struct jffs2_inode_info *dir_f = JFFS2_INODE_INFO(dir_i);
233 struct jffs2_inode_info *dead_f = JFFS2_INODE_INFO(dentry->d_inode);
235 uint32_t now = get_seconds();
237 ret = jffs2_do_unlink(c, dir_f, dentry->d_name.name,
238 dentry->d_name.len, dead_f, now);
239 if (dead_f->inocache)
240 dentry->d_inode->i_nlink = dead_f->inocache->nlink;
242 dir_i->i_mtime = dir_i->i_ctime = ITIME(now);
245 /***********************************************************************/
248 static int jffs2_link (struct dentry *old_dentry, struct inode *dir_i, struct dentry *dentry)
250 struct jffs2_sb_info *c = JFFS2_SB_INFO(old_dentry->d_inode->i_sb);
251 struct jffs2_inode_info *f = JFFS2_INODE_INFO(old_dentry->d_inode);
252 struct jffs2_inode_info *dir_f = JFFS2_INODE_INFO(dir_i);
257 /* Don't let people make hard links to bad inodes. */
261 if (S_ISDIR(old_dentry->d_inode->i_mode))
264 /* XXX: This is ugly */
265 type = (old_dentry->d_inode->i_mode & S_IFMT) >> 12;
266 if (!type) type = DT_REG;
269 ret = jffs2_do_link(c, dir_f, f->inocache->ino, type, dentry->d_name.name, dentry->d_name.len, now);
273 old_dentry->d_inode->i_nlink = ++f->inocache->nlink;
275 d_instantiate(dentry, old_dentry->d_inode);
276 dir_i->i_mtime = dir_i->i_ctime = ITIME(now);
277 atomic_inc(&old_dentry->d_inode->i_count);
282 /***********************************************************************/
284 static int jffs2_symlink (struct inode *dir_i, struct dentry *dentry, const char *target)
286 struct jffs2_inode_info *f, *dir_f;
287 struct jffs2_sb_info *c;
289 struct jffs2_raw_inode *ri;
290 struct jffs2_raw_dirent *rd;
291 struct jffs2_full_dnode *fn;
292 struct jffs2_full_dirent *fd;
294 uint32_t alloclen, phys_ofs;
295 int ret, targetlen = strlen(target);
297 /* FIXME: If you care. We'd need to use frags for the target
298 if it grows much more than this */
302 ri = jffs2_alloc_raw_inode();
307 c = JFFS2_SB_INFO(dir_i->i_sb);
309 /* Try to reserve enough space for both node and dirent.
310 * Just the node will do for now, though
312 namelen = dentry->d_name.len;
313 ret = jffs2_reserve_space(c, sizeof(*ri) + targetlen, &phys_ofs, &alloclen, ALLOC_NORMAL);
316 jffs2_free_raw_inode(ri);
320 inode = jffs2_new_inode(dir_i, S_IFLNK | S_IRWXUGO, ri);
323 jffs2_free_raw_inode(ri);
324 jffs2_complete_reservation(c);
325 return PTR_ERR(inode);
328 inode->i_op = &jffs2_symlink_inode_operations;
330 f = JFFS2_INODE_INFO(inode);
332 inode->i_size = targetlen;
333 ri->isize = ri->dsize = ri->csize = cpu_to_je32(inode->i_size);
334 ri->totlen = cpu_to_je32(sizeof(*ri) + inode->i_size);
335 ri->hdr_crc = cpu_to_je32(crc32(0, ri, sizeof(struct jffs2_unknown_node)-4));
337 ri->compr = JFFS2_COMPR_NONE;
338 ri->data_crc = cpu_to_je32(crc32(0, target, targetlen));
339 ri->node_crc = cpu_to_je32(crc32(0, ri, sizeof(*ri)-8));
341 fn = jffs2_write_dnode(c, f, ri, target, targetlen, phys_ofs, ALLOC_NORMAL);
343 jffs2_free_raw_inode(ri);
346 /* Eeek. Wave bye bye */
348 jffs2_complete_reservation(c);
349 jffs2_clear_inode(inode);
353 /* We use f->target field to store the target path. */
354 f->target = kmalloc(targetlen + 1, GFP_KERNEL);
356 printk(KERN_WARNING "Can't allocate %d bytes of memory\n", targetlen + 1);
358 jffs2_complete_reservation(c);
359 jffs2_clear_inode(inode);
363 memcpy(f->target, target, targetlen + 1);
364 D1(printk(KERN_DEBUG "jffs2_symlink: symlink's target '%s' cached\n", (char *)f->target));
366 /* No data here. Only a metadata node, which will be
367 obsoleted by the first data write
372 jffs2_complete_reservation(c);
373 ret = jffs2_reserve_space(c, sizeof(*rd)+namelen, &phys_ofs, &alloclen, ALLOC_NORMAL);
376 jffs2_clear_inode(inode);
380 rd = jffs2_alloc_raw_dirent();
382 /* Argh. Now we treat it like a normal delete */
383 jffs2_complete_reservation(c);
384 jffs2_clear_inode(inode);
388 dir_f = JFFS2_INODE_INFO(dir_i);
391 rd->magic = cpu_to_je16(JFFS2_MAGIC_BITMASK);
392 rd->nodetype = cpu_to_je16(JFFS2_NODETYPE_DIRENT);
393 rd->totlen = cpu_to_je32(sizeof(*rd) + namelen);
394 rd->hdr_crc = cpu_to_je32(crc32(0, rd, sizeof(struct jffs2_unknown_node)-4));
396 rd->pino = cpu_to_je32(dir_i->i_ino);
397 rd->version = cpu_to_je32(++dir_f->highest_version);
398 rd->ino = cpu_to_je32(inode->i_ino);
399 rd->mctime = cpu_to_je32(get_seconds());
402 rd->node_crc = cpu_to_je32(crc32(0, rd, sizeof(*rd)-8));
403 rd->name_crc = cpu_to_je32(crc32(0, dentry->d_name.name, namelen));
405 fd = jffs2_write_dirent(c, dir_f, rd, dentry->d_name.name, namelen, phys_ofs, ALLOC_NORMAL);
408 /* dirent failed to write. Delete the inode normally
409 as if it were the final unlink() */
410 jffs2_complete_reservation(c);
411 jffs2_free_raw_dirent(rd);
413 jffs2_clear_inode(inode);
417 dir_i->i_mtime = dir_i->i_ctime = ITIME(je32_to_cpu(rd->mctime));
419 jffs2_free_raw_dirent(rd);
421 /* Link the fd into the inode's list, obsoleting an old
423 jffs2_add_fd_to_list(c, fd, &dir_f->dents);
426 jffs2_complete_reservation(c);
428 d_instantiate(dentry, inode);
433 static int jffs2_mkdir (struct inode *dir_i, struct dentry *dentry, int mode)
435 struct jffs2_inode_info *f, *dir_f;
436 struct jffs2_sb_info *c;
438 struct jffs2_raw_inode *ri;
439 struct jffs2_raw_dirent *rd;
440 struct jffs2_full_dnode *fn;
441 struct jffs2_full_dirent *fd;
443 uint32_t alloclen, phys_ofs;
448 ri = jffs2_alloc_raw_inode();
452 c = JFFS2_SB_INFO(dir_i->i_sb);
454 /* Try to reserve enough space for both node and dirent.
455 * Just the node will do for now, though
457 namelen = dentry->d_name.len;
458 ret = jffs2_reserve_space(c, sizeof(*ri), &phys_ofs, &alloclen, ALLOC_NORMAL);
461 jffs2_free_raw_inode(ri);
465 inode = jffs2_new_inode(dir_i, mode, ri);
468 jffs2_free_raw_inode(ri);
469 jffs2_complete_reservation(c);
470 return PTR_ERR(inode);
473 inode->i_op = &jffs2_dir_inode_operations;
474 inode->i_fop = &jffs2_dir_operations;
475 /* Directories get nlink 2 at start */
478 f = JFFS2_INODE_INFO(inode);
480 ri->data_crc = cpu_to_je32(0);
481 ri->node_crc = cpu_to_je32(crc32(0, ri, sizeof(*ri)-8));
483 fn = jffs2_write_dnode(c, f, ri, NULL, 0, phys_ofs, ALLOC_NORMAL);
485 jffs2_free_raw_inode(ri);
488 /* Eeek. Wave bye bye */
490 jffs2_complete_reservation(c);
491 jffs2_clear_inode(inode);
494 /* No data here. Only a metadata node, which will be
495 obsoleted by the first data write
500 jffs2_complete_reservation(c);
501 ret = jffs2_reserve_space(c, sizeof(*rd)+namelen, &phys_ofs, &alloclen, ALLOC_NORMAL);
504 jffs2_clear_inode(inode);
508 rd = jffs2_alloc_raw_dirent();
510 /* Argh. Now we treat it like a normal delete */
511 jffs2_complete_reservation(c);
512 jffs2_clear_inode(inode);
516 dir_f = JFFS2_INODE_INFO(dir_i);
519 rd->magic = cpu_to_je16(JFFS2_MAGIC_BITMASK);
520 rd->nodetype = cpu_to_je16(JFFS2_NODETYPE_DIRENT);
521 rd->totlen = cpu_to_je32(sizeof(*rd) + namelen);
522 rd->hdr_crc = cpu_to_je32(crc32(0, rd, sizeof(struct jffs2_unknown_node)-4));
524 rd->pino = cpu_to_je32(dir_i->i_ino);
525 rd->version = cpu_to_je32(++dir_f->highest_version);
526 rd->ino = cpu_to_je32(inode->i_ino);
527 rd->mctime = cpu_to_je32(get_seconds());
530 rd->node_crc = cpu_to_je32(crc32(0, rd, sizeof(*rd)-8));
531 rd->name_crc = cpu_to_je32(crc32(0, dentry->d_name.name, namelen));
533 fd = jffs2_write_dirent(c, dir_f, rd, dentry->d_name.name, namelen, phys_ofs, ALLOC_NORMAL);
536 /* dirent failed to write. Delete the inode normally
537 as if it were the final unlink() */
538 jffs2_complete_reservation(c);
539 jffs2_free_raw_dirent(rd);
541 jffs2_clear_inode(inode);
545 dir_i->i_mtime = dir_i->i_ctime = ITIME(je32_to_cpu(rd->mctime));
548 jffs2_free_raw_dirent(rd);
550 /* Link the fd into the inode's list, obsoleting an old
552 jffs2_add_fd_to_list(c, fd, &dir_f->dents);
555 jffs2_complete_reservation(c);
557 d_instantiate(dentry, inode);
561 static int jffs2_rmdir (struct inode *dir_i, struct dentry *dentry)
563 struct jffs2_inode_info *f = JFFS2_INODE_INFO(dentry->d_inode);
564 struct jffs2_full_dirent *fd;
567 for (fd = f->dents ; fd; fd = fd->next) {
571 ret = jffs2_unlink(dir_i, dentry);
577 static int jffs2_mknod (struct inode *dir_i, struct dentry *dentry, int mode, dev_t rdev)
579 struct jffs2_inode_info *f, *dir_f;
580 struct jffs2_sb_info *c;
582 struct jffs2_raw_inode *ri;
583 struct jffs2_raw_dirent *rd;
584 struct jffs2_full_dnode *fn;
585 struct jffs2_full_dirent *fd;
589 uint32_t alloclen, phys_ofs;
592 if (!old_valid_dev(rdev))
595 ri = jffs2_alloc_raw_inode();
599 c = JFFS2_SB_INFO(dir_i->i_sb);
601 if (S_ISBLK(mode) || S_ISCHR(mode)) {
602 dev = cpu_to_je16(old_encode_dev(rdev));
603 devlen = sizeof(dev);
606 /* Try to reserve enough space for both node and dirent.
607 * Just the node will do for now, though
609 namelen = dentry->d_name.len;
610 ret = jffs2_reserve_space(c, sizeof(*ri) + devlen, &phys_ofs, &alloclen, ALLOC_NORMAL);
613 jffs2_free_raw_inode(ri);
617 inode = jffs2_new_inode(dir_i, mode, ri);
620 jffs2_free_raw_inode(ri);
621 jffs2_complete_reservation(c);
622 return PTR_ERR(inode);
624 inode->i_op = &jffs2_file_inode_operations;
625 init_special_inode(inode, inode->i_mode, rdev);
627 f = JFFS2_INODE_INFO(inode);
629 ri->dsize = ri->csize = cpu_to_je32(devlen);
630 ri->totlen = cpu_to_je32(sizeof(*ri) + devlen);
631 ri->hdr_crc = cpu_to_je32(crc32(0, ri, sizeof(struct jffs2_unknown_node)-4));
633 ri->compr = JFFS2_COMPR_NONE;
634 ri->data_crc = cpu_to_je32(crc32(0, &dev, devlen));
635 ri->node_crc = cpu_to_je32(crc32(0, ri, sizeof(*ri)-8));
637 fn = jffs2_write_dnode(c, f, ri, (char *)&dev, devlen, phys_ofs, ALLOC_NORMAL);
639 jffs2_free_raw_inode(ri);
642 /* Eeek. Wave bye bye */
644 jffs2_complete_reservation(c);
645 jffs2_clear_inode(inode);
648 /* No data here. Only a metadata node, which will be
649 obsoleted by the first data write
654 jffs2_complete_reservation(c);
655 ret = jffs2_reserve_space(c, sizeof(*rd)+namelen, &phys_ofs, &alloclen, ALLOC_NORMAL);
658 jffs2_clear_inode(inode);
662 rd = jffs2_alloc_raw_dirent();
664 /* Argh. Now we treat it like a normal delete */
665 jffs2_complete_reservation(c);
666 jffs2_clear_inode(inode);
670 dir_f = JFFS2_INODE_INFO(dir_i);
673 rd->magic = cpu_to_je16(JFFS2_MAGIC_BITMASK);
674 rd->nodetype = cpu_to_je16(JFFS2_NODETYPE_DIRENT);
675 rd->totlen = cpu_to_je32(sizeof(*rd) + namelen);
676 rd->hdr_crc = cpu_to_je32(crc32(0, rd, sizeof(struct jffs2_unknown_node)-4));
678 rd->pino = cpu_to_je32(dir_i->i_ino);
679 rd->version = cpu_to_je32(++dir_f->highest_version);
680 rd->ino = cpu_to_je32(inode->i_ino);
681 rd->mctime = cpu_to_je32(get_seconds());
684 /* XXX: This is ugly. */
685 rd->type = (mode & S_IFMT) >> 12;
687 rd->node_crc = cpu_to_je32(crc32(0, rd, sizeof(*rd)-8));
688 rd->name_crc = cpu_to_je32(crc32(0, dentry->d_name.name, namelen));
690 fd = jffs2_write_dirent(c, dir_f, rd, dentry->d_name.name, namelen, phys_ofs, ALLOC_NORMAL);
693 /* dirent failed to write. Delete the inode normally
694 as if it were the final unlink() */
695 jffs2_complete_reservation(c);
696 jffs2_free_raw_dirent(rd);
698 jffs2_clear_inode(inode);
702 dir_i->i_mtime = dir_i->i_ctime = ITIME(je32_to_cpu(rd->mctime));
704 jffs2_free_raw_dirent(rd);
706 /* Link the fd into the inode's list, obsoleting an old
708 jffs2_add_fd_to_list(c, fd, &dir_f->dents);
711 jffs2_complete_reservation(c);
713 d_instantiate(dentry, inode);
718 static int jffs2_rename (struct inode *old_dir_i, struct dentry *old_dentry,
719 struct inode *new_dir_i, struct dentry *new_dentry)
722 struct jffs2_sb_info *c = JFFS2_SB_INFO(old_dir_i->i_sb);
723 struct jffs2_inode_info *victim_f = NULL;
727 /* The VFS will check for us and prevent trying to rename a
728 * file over a directory and vice versa, but if it's a directory,
729 * the VFS can't check whether the victim is empty. The filesystem
730 * needs to do that for itself.
732 if (new_dentry->d_inode) {
733 victim_f = JFFS2_INODE_INFO(new_dentry->d_inode);
734 if (S_ISDIR(new_dentry->d_inode->i_mode)) {
735 struct jffs2_full_dirent *fd;
737 down(&victim_f->sem);
738 for (fd = victim_f->dents; fd; fd = fd->next) {
748 /* XXX: We probably ought to alloc enough space for
749 both nodes at the same time. Writing the new link,
750 then getting -ENOSPC, is quite bad :)
753 /* Make a hard link */
755 /* XXX: This is ugly */
756 type = (old_dentry->d_inode->i_mode & S_IFMT) >> 12;
757 if (!type) type = DT_REG;
760 ret = jffs2_do_link(c, JFFS2_INODE_INFO(new_dir_i),
761 old_dentry->d_inode->i_ino, type,
762 new_dentry->d_name.name, new_dentry->d_name.len, now);
768 /* There was a victim. Kill it off nicely */
769 new_dentry->d_inode->i_nlink--;
770 /* Don't oops if the victim was a dirent pointing to an
771 inode which didn't exist. */
772 if (victim_f->inocache) {
773 down(&victim_f->sem);
774 victim_f->inocache->nlink--;
779 /* If it was a directory we moved, and there was no victim,
780 increase i_nlink on its new parent */
781 if (S_ISDIR(old_dentry->d_inode->i_mode) && !victim_f)
782 new_dir_i->i_nlink++;
784 /* Unlink the original */
785 ret = jffs2_do_unlink(c, JFFS2_INODE_INFO(old_dir_i),
786 old_dentry->d_name.name, old_dentry->d_name.len, NULL, now);
788 /* We don't touch inode->i_nlink */
791 /* Oh shit. We really ought to make a single node which can do both atomically */
792 struct jffs2_inode_info *f = JFFS2_INODE_INFO(old_dentry->d_inode);
794 old_dentry->d_inode->i_nlink++;
796 f->inocache->nlink++;
799 printk(KERN_NOTICE "jffs2_rename(): Link succeeded, unlink failed (err %d). You now have a hard link\n", ret);
800 /* Might as well let the VFS know */
801 d_instantiate(new_dentry, old_dentry->d_inode);
802 atomic_inc(&old_dentry->d_inode->i_count);
803 new_dir_i->i_mtime = new_dir_i->i_ctime = ITIME(now);
807 if (S_ISDIR(old_dentry->d_inode->i_mode))
808 old_dir_i->i_nlink--;
810 new_dir_i->i_mtime = new_dir_i->i_ctime = old_dir_i->i_mtime = old_dir_i->i_ctime = ITIME(now);