2 * JFFS2 -- Journalling Flash File System, Version 2.
4 * Copyright (C) 2001-2003 Red Hat, Inc.
6 * Created by David Woodhouse <dwmw2@redhat.com>
8 * For licensing information, see the file 'LICENCE' in this directory.
10 * $Id: dir.c,v 1.82 2003/10/11 11:47:23 dwmw2 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 /* Urgh. Please tell me there's a nicer way of doing these. */
26 #include <linux/version.h>
27 #if LINUX_VERSION_CODE < KERNEL_VERSION(2,5,48)
28 typedef int mknod_arg_t;
29 #define NAMEI_COMPAT(x) ((void *)x)
31 typedef dev_t mknod_arg_t;
32 #define NAMEI_COMPAT(x) (x)
35 static int jffs2_readdir (struct file *, void *, filldir_t);
37 static int jffs2_create (struct inode *,struct dentry *,int,
39 static struct dentry *jffs2_lookup (struct inode *,struct dentry *,
41 static int jffs2_link (struct dentry *,struct inode *,struct dentry *);
42 static int jffs2_unlink (struct inode *,struct dentry *);
43 static int jffs2_symlink (struct inode *,struct dentry *,const char *);
44 static int jffs2_mkdir (struct inode *,struct dentry *,int);
45 static int jffs2_rmdir (struct inode *,struct dentry *);
46 static int jffs2_mknod (struct inode *,struct dentry *,int,mknod_arg_t);
47 static int jffs2_rename (struct inode *, struct dentry *,
48 struct inode *, struct dentry *);
50 struct file_operations jffs2_dir_operations =
52 .read = generic_read_dir,
53 .readdir = jffs2_readdir,
59 struct inode_operations jffs2_dir_inode_operations =
61 .create = NAMEI_COMPAT(jffs2_create),
62 .lookup = NAMEI_COMPAT(jffs2_lookup),
64 .unlink = jffs2_unlink,
65 .symlink = jffs2_symlink,
69 .rename = jffs2_rename,
70 .setattr = jffs2_setattr,
73 /***********************************************************************/
76 /* We keep the dirent list sorted in increasing order of name hash,
77 and we use the same hash function as the dentries. Makes this
80 static struct dentry *jffs2_lookup(struct inode *dir_i, struct dentry *target,
83 struct jffs2_inode_info *dir_f;
84 struct jffs2_sb_info *c;
85 struct jffs2_full_dirent *fd = NULL, *fd_list;
87 struct inode *inode = NULL;
89 D1(printk(KERN_DEBUG "jffs2_lookup()\n"));
91 dir_f = JFFS2_INODE_INFO(dir_i);
92 c = JFFS2_SB_INFO(dir_i->i_sb);
96 /* NB: The 2.2 backport will need to explicitly check for '.' and '..' here */
97 for (fd_list = dir_f->dents; fd_list && fd_list->nhash <= target->d_name.hash; fd_list = fd_list->next) {
98 if (fd_list->nhash == target->d_name.hash &&
99 (!fd || fd_list->version > fd->version) &&
100 strlen(fd_list->name) == target->d_name.len &&
101 !strncmp(fd_list->name, target->d_name.name, target->d_name.len)) {
109 inode = iget(dir_i->i_sb, ino);
111 printk(KERN_WARNING "iget() failed for ino #%u\n", ino);
112 return (ERR_PTR(-EIO));
116 d_add(target, inode);
121 /***********************************************************************/
124 static int jffs2_readdir(struct file *filp, void *dirent, filldir_t filldir)
126 struct jffs2_inode_info *f;
127 struct jffs2_sb_info *c;
128 struct inode *inode = filp->f_dentry->d_inode;
129 struct jffs2_full_dirent *fd;
130 unsigned long offset, curofs;
132 D1(printk(KERN_DEBUG "jffs2_readdir() for dir_i #%lu\n", filp->f_dentry->d_inode->i_ino));
134 f = JFFS2_INODE_INFO(inode);
135 c = JFFS2_SB_INFO(inode->i_sb);
137 offset = filp->f_pos;
140 D1(printk(KERN_DEBUG "Dirent 0: \".\", ino #%lu\n", inode->i_ino));
141 if (filldir(dirent, ".", 1, 0, inode->i_ino, DT_DIR) < 0)
146 unsigned long pino = parent_ino(filp->f_dentry);
147 D1(printk(KERN_DEBUG "Dirent 1: \"..\", ino #%lu\n", pino));
148 if (filldir(dirent, "..", 2, 1, pino, DT_DIR) < 0)
155 for (fd = f->dents; fd; fd = fd->next) {
158 /* First loop: curofs = 2; offset = 2 */
159 if (curofs < offset) {
160 D2(printk(KERN_DEBUG "Skipping dirent: \"%s\", ino #%u, type %d, because curofs %ld < offset %ld\n",
161 fd->name, fd->ino, fd->type, curofs, offset));
165 D2(printk(KERN_DEBUG "Skipping deletion dirent \"%s\"\n", fd->name));
169 D2(printk(KERN_DEBUG "Dirent %ld: \"%s\", ino #%u, type %d\n", offset, fd->name, fd->ino, fd->type));
170 if (filldir(dirent, fd->name, strlen(fd->name), offset, fd->ino, fd->type) < 0)
176 filp->f_pos = offset;
180 /***********************************************************************/
183 static int jffs2_create(struct inode *dir_i, struct dentry *dentry, int mode,
184 struct nameidata *nd)
186 struct jffs2_raw_inode *ri;
187 struct jffs2_inode_info *f, *dir_f;
188 struct jffs2_sb_info *c;
192 ri = jffs2_alloc_raw_inode();
196 c = JFFS2_SB_INFO(dir_i->i_sb);
198 D1(printk(KERN_DEBUG "jffs2_create()\n"));
200 inode = jffs2_new_inode(dir_i, mode, ri);
203 D1(printk(KERN_DEBUG "jffs2_new_inode() failed\n"));
204 jffs2_free_raw_inode(ri);
205 return PTR_ERR(inode);
208 inode->i_op = &jffs2_file_inode_operations;
209 inode->i_fop = &jffs2_file_operations;
210 inode->i_mapping->a_ops = &jffs2_file_address_operations;
211 inode->i_mapping->nrpages = 0;
213 f = JFFS2_INODE_INFO(inode);
214 dir_f = JFFS2_INODE_INFO(dir_i);
216 ret = jffs2_do_create(c, dir_f, f, ri,
217 dentry->d_name.name, dentry->d_name.len);
220 jffs2_clear_inode(inode);
221 make_bad_inode(inode);
223 jffs2_free_raw_inode(ri);
227 dir_i->i_mtime = dir_i->i_ctime = ITIME(je32_to_cpu(ri->ctime));
229 jffs2_free_raw_inode(ri);
230 d_instantiate(dentry, inode);
232 D1(printk(KERN_DEBUG "jffs2_create: Created ino #%lu with mode %o, nlink %d(%d). nrpages %ld\n",
233 inode->i_ino, inode->i_mode, inode->i_nlink, f->inocache->nlink, inode->i_mapping->nrpages));
237 /***********************************************************************/
240 static int jffs2_unlink(struct inode *dir_i, struct dentry *dentry)
242 struct jffs2_sb_info *c = JFFS2_SB_INFO(dir_i->i_sb);
243 struct jffs2_inode_info *dir_f = JFFS2_INODE_INFO(dir_i);
244 struct jffs2_inode_info *dead_f = JFFS2_INODE_INFO(dentry->d_inode);
247 ret = jffs2_do_unlink(c, dir_f, dentry->d_name.name,
248 dentry->d_name.len, dead_f);
249 if (dead_f->inocache)
250 dentry->d_inode->i_nlink = dead_f->inocache->nlink;
253 /***********************************************************************/
256 static int jffs2_link (struct dentry *old_dentry, struct inode *dir_i, struct dentry *dentry)
258 struct jffs2_sb_info *c = JFFS2_SB_INFO(old_dentry->d_inode->i_sb);
259 struct jffs2_inode_info *f = JFFS2_INODE_INFO(old_dentry->d_inode);
260 struct jffs2_inode_info *dir_f = JFFS2_INODE_INFO(dir_i);
264 /* Don't let people make hard links to bad inodes. */
268 if (S_ISDIR(old_dentry->d_inode->i_mode))
271 /* XXX: This is ugly */
272 type = (old_dentry->d_inode->i_mode & S_IFMT) >> 12;
273 if (!type) type = DT_REG;
275 ret = jffs2_do_link(c, dir_f, f->inocache->ino, type, dentry->d_name.name, dentry->d_name.len);
279 old_dentry->d_inode->i_nlink = ++f->inocache->nlink;
281 d_instantiate(dentry, old_dentry->d_inode);
282 atomic_inc(&old_dentry->d_inode->i_count);
287 /***********************************************************************/
289 static int jffs2_symlink (struct inode *dir_i, struct dentry *dentry, const char *target)
291 struct jffs2_inode_info *f, *dir_f;
292 struct jffs2_sb_info *c;
294 struct jffs2_raw_inode *ri;
295 struct jffs2_raw_dirent *rd;
296 struct jffs2_full_dnode *fn;
297 struct jffs2_full_dirent *fd;
299 uint32_t alloclen, phys_ofs;
302 /* FIXME: If you care. We'd need to use frags for the target
303 if it grows much more than this */
304 if (strlen(target) > 254)
307 ri = jffs2_alloc_raw_inode();
312 c = JFFS2_SB_INFO(dir_i->i_sb);
314 /* Try to reserve enough space for both node and dirent.
315 * Just the node will do for now, though
317 namelen = dentry->d_name.len;
318 ret = jffs2_reserve_space(c, sizeof(*ri) + strlen(target), &phys_ofs, &alloclen, ALLOC_NORMAL);
321 jffs2_free_raw_inode(ri);
325 inode = jffs2_new_inode(dir_i, S_IFLNK | S_IRWXUGO, ri);
328 jffs2_free_raw_inode(ri);
329 jffs2_complete_reservation(c);
330 return PTR_ERR(inode);
333 inode->i_op = &jffs2_symlink_inode_operations;
335 f = JFFS2_INODE_INFO(inode);
337 inode->i_size = strlen(target);
338 ri->isize = ri->dsize = ri->csize = cpu_to_je32(inode->i_size);
339 ri->totlen = cpu_to_je32(sizeof(*ri) + inode->i_size);
340 ri->hdr_crc = cpu_to_je32(crc32(0, ri, sizeof(struct jffs2_unknown_node)-4));
342 ri->compr = JFFS2_COMPR_NONE;
343 ri->data_crc = cpu_to_je32(crc32(0, target, strlen(target)));
344 ri->node_crc = cpu_to_je32(crc32(0, ri, sizeof(*ri)-8));
346 fn = jffs2_write_dnode(c, f, ri, target, strlen(target), phys_ofs, ALLOC_NORMAL);
348 jffs2_free_raw_inode(ri);
351 /* Eeek. Wave bye bye */
353 jffs2_complete_reservation(c);
354 jffs2_clear_inode(inode);
357 /* No data here. Only a metadata node, which will be
358 obsoleted by the first data write
363 jffs2_complete_reservation(c);
364 ret = jffs2_reserve_space(c, sizeof(*rd)+namelen, &phys_ofs, &alloclen, ALLOC_NORMAL);
367 jffs2_clear_inode(inode);
371 rd = jffs2_alloc_raw_dirent();
373 /* Argh. Now we treat it like a normal delete */
374 jffs2_complete_reservation(c);
375 jffs2_clear_inode(inode);
379 dir_f = JFFS2_INODE_INFO(dir_i);
382 rd->magic = cpu_to_je16(JFFS2_MAGIC_BITMASK);
383 rd->nodetype = cpu_to_je16(JFFS2_NODETYPE_DIRENT);
384 rd->totlen = cpu_to_je32(sizeof(*rd) + namelen);
385 rd->hdr_crc = cpu_to_je32(crc32(0, rd, sizeof(struct jffs2_unknown_node)-4));
387 rd->pino = cpu_to_je32(dir_i->i_ino);
388 rd->version = cpu_to_je32(++dir_f->highest_version);
389 rd->ino = cpu_to_je32(inode->i_ino);
390 rd->mctime = cpu_to_je32(get_seconds());
393 rd->node_crc = cpu_to_je32(crc32(0, rd, sizeof(*rd)-8));
394 rd->name_crc = cpu_to_je32(crc32(0, dentry->d_name.name, namelen));
396 fd = jffs2_write_dirent(c, dir_f, rd, dentry->d_name.name, namelen, phys_ofs, ALLOC_NORMAL);
399 /* dirent failed to write. Delete the inode normally
400 as if it were the final unlink() */
401 jffs2_complete_reservation(c);
402 jffs2_free_raw_dirent(rd);
404 jffs2_clear_inode(inode);
408 dir_i->i_mtime = dir_i->i_ctime = ITIME(je32_to_cpu(rd->mctime));
410 jffs2_free_raw_dirent(rd);
412 /* Link the fd into the inode's list, obsoleting an old
414 jffs2_add_fd_to_list(c, fd, &dir_f->dents);
417 jffs2_complete_reservation(c);
419 d_instantiate(dentry, inode);
424 static int jffs2_mkdir (struct inode *dir_i, struct dentry *dentry, int mode)
426 struct jffs2_inode_info *f, *dir_f;
427 struct jffs2_sb_info *c;
429 struct jffs2_raw_inode *ri;
430 struct jffs2_raw_dirent *rd;
431 struct jffs2_full_dnode *fn;
432 struct jffs2_full_dirent *fd;
434 uint32_t alloclen, phys_ofs;
439 ri = jffs2_alloc_raw_inode();
443 c = JFFS2_SB_INFO(dir_i->i_sb);
445 /* Try to reserve enough space for both node and dirent.
446 * Just the node will do for now, though
448 namelen = dentry->d_name.len;
449 ret = jffs2_reserve_space(c, sizeof(*ri), &phys_ofs, &alloclen, ALLOC_NORMAL);
452 jffs2_free_raw_inode(ri);
456 inode = jffs2_new_inode(dir_i, mode, ri);
459 jffs2_free_raw_inode(ri);
460 jffs2_complete_reservation(c);
461 return PTR_ERR(inode);
464 inode->i_op = &jffs2_dir_inode_operations;
465 inode->i_fop = &jffs2_dir_operations;
466 /* Directories get nlink 2 at start */
469 f = JFFS2_INODE_INFO(inode);
471 ri->data_crc = cpu_to_je32(0);
472 ri->node_crc = cpu_to_je32(crc32(0, ri, sizeof(*ri)-8));
474 fn = jffs2_write_dnode(c, f, ri, NULL, 0, phys_ofs, ALLOC_NORMAL);
476 jffs2_free_raw_inode(ri);
479 /* Eeek. Wave bye bye */
481 jffs2_complete_reservation(c);
482 jffs2_clear_inode(inode);
485 /* No data here. Only a metadata node, which will be
486 obsoleted by the first data write
491 jffs2_complete_reservation(c);
492 ret = jffs2_reserve_space(c, sizeof(*rd)+namelen, &phys_ofs, &alloclen, ALLOC_NORMAL);
495 jffs2_clear_inode(inode);
499 rd = jffs2_alloc_raw_dirent();
501 /* Argh. Now we treat it like a normal delete */
502 jffs2_complete_reservation(c);
503 jffs2_clear_inode(inode);
507 dir_f = JFFS2_INODE_INFO(dir_i);
510 rd->magic = cpu_to_je16(JFFS2_MAGIC_BITMASK);
511 rd->nodetype = cpu_to_je16(JFFS2_NODETYPE_DIRENT);
512 rd->totlen = cpu_to_je32(sizeof(*rd) + namelen);
513 rd->hdr_crc = cpu_to_je32(crc32(0, rd, sizeof(struct jffs2_unknown_node)-4));
515 rd->pino = cpu_to_je32(dir_i->i_ino);
516 rd->version = cpu_to_je32(++dir_f->highest_version);
517 rd->ino = cpu_to_je32(inode->i_ino);
518 rd->mctime = cpu_to_je32(get_seconds());
521 rd->node_crc = cpu_to_je32(crc32(0, rd, sizeof(*rd)-8));
522 rd->name_crc = cpu_to_je32(crc32(0, dentry->d_name.name, namelen));
524 fd = jffs2_write_dirent(c, dir_f, rd, dentry->d_name.name, namelen, phys_ofs, ALLOC_NORMAL);
527 /* dirent failed to write. Delete the inode normally
528 as if it were the final unlink() */
529 jffs2_complete_reservation(c);
530 jffs2_free_raw_dirent(rd);
532 jffs2_clear_inode(inode);
536 dir_i->i_mtime = dir_i->i_ctime = ITIME(je32_to_cpu(rd->mctime));
539 jffs2_free_raw_dirent(rd);
541 /* Link the fd into the inode's list, obsoleting an old
543 jffs2_add_fd_to_list(c, fd, &dir_f->dents);
546 jffs2_complete_reservation(c);
548 d_instantiate(dentry, inode);
552 static int jffs2_rmdir (struct inode *dir_i, struct dentry *dentry)
554 struct jffs2_inode_info *f = JFFS2_INODE_INFO(dentry->d_inode);
555 struct jffs2_full_dirent *fd;
558 for (fd = f->dents ; fd; fd = fd->next) {
562 ret = jffs2_unlink(dir_i, dentry);
568 static int jffs2_mknod (struct inode *dir_i, struct dentry *dentry, int mode, mknod_arg_t rdev)
570 struct jffs2_inode_info *f, *dir_f;
571 struct jffs2_sb_info *c;
573 struct jffs2_raw_inode *ri;
574 struct jffs2_raw_dirent *rd;
575 struct jffs2_full_dnode *fn;
576 struct jffs2_full_dirent *fd;
580 uint32_t alloclen, phys_ofs;
583 if (!old_valid_dev(rdev))
586 ri = jffs2_alloc_raw_inode();
590 c = JFFS2_SB_INFO(dir_i->i_sb);
592 if (S_ISBLK(mode) || S_ISCHR(mode)) {
593 dev = cpu_to_je16(old_encode_dev(rdev));
594 devlen = sizeof(dev);
597 /* Try to reserve enough space for both node and dirent.
598 * Just the node will do for now, though
600 namelen = dentry->d_name.len;
601 ret = jffs2_reserve_space(c, sizeof(*ri) + devlen, &phys_ofs, &alloclen, ALLOC_NORMAL);
604 jffs2_free_raw_inode(ri);
608 inode = jffs2_new_inode(dir_i, mode, ri);
611 jffs2_free_raw_inode(ri);
612 jffs2_complete_reservation(c);
613 return PTR_ERR(inode);
615 inode->i_op = &jffs2_file_inode_operations;
616 init_special_inode(inode, inode->i_mode, rdev);
618 f = JFFS2_INODE_INFO(inode);
620 ri->dsize = ri->csize = cpu_to_je32(devlen);
621 ri->totlen = cpu_to_je32(sizeof(*ri) + devlen);
622 ri->hdr_crc = cpu_to_je32(crc32(0, ri, sizeof(struct jffs2_unknown_node)-4));
624 ri->compr = JFFS2_COMPR_NONE;
625 ri->data_crc = cpu_to_je32(crc32(0, &dev, devlen));
626 ri->node_crc = cpu_to_je32(crc32(0, ri, sizeof(*ri)-8));
628 fn = jffs2_write_dnode(c, f, ri, (char *)&dev, devlen, phys_ofs, ALLOC_NORMAL);
630 jffs2_free_raw_inode(ri);
633 /* Eeek. Wave bye bye */
635 jffs2_complete_reservation(c);
636 jffs2_clear_inode(inode);
639 /* No data here. Only a metadata node, which will be
640 obsoleted by the first data write
645 jffs2_complete_reservation(c);
646 ret = jffs2_reserve_space(c, sizeof(*rd)+namelen, &phys_ofs, &alloclen, ALLOC_NORMAL);
649 jffs2_clear_inode(inode);
653 rd = jffs2_alloc_raw_dirent();
655 /* Argh. Now we treat it like a normal delete */
656 jffs2_complete_reservation(c);
657 jffs2_clear_inode(inode);
661 dir_f = JFFS2_INODE_INFO(dir_i);
664 rd->magic = cpu_to_je16(JFFS2_MAGIC_BITMASK);
665 rd->nodetype = cpu_to_je16(JFFS2_NODETYPE_DIRENT);
666 rd->totlen = cpu_to_je32(sizeof(*rd) + namelen);
667 rd->hdr_crc = cpu_to_je32(crc32(0, rd, sizeof(struct jffs2_unknown_node)-4));
669 rd->pino = cpu_to_je32(dir_i->i_ino);
670 rd->version = cpu_to_je32(++dir_f->highest_version);
671 rd->ino = cpu_to_je32(inode->i_ino);
672 rd->mctime = cpu_to_je32(get_seconds());
675 /* XXX: This is ugly. */
676 rd->type = (mode & S_IFMT) >> 12;
678 rd->node_crc = cpu_to_je32(crc32(0, rd, sizeof(*rd)-8));
679 rd->name_crc = cpu_to_je32(crc32(0, dentry->d_name.name, namelen));
681 fd = jffs2_write_dirent(c, dir_f, rd, dentry->d_name.name, namelen, phys_ofs, ALLOC_NORMAL);
684 /* dirent failed to write. Delete the inode normally
685 as if it were the final unlink() */
686 jffs2_complete_reservation(c);
687 jffs2_free_raw_dirent(rd);
689 jffs2_clear_inode(inode);
693 dir_i->i_mtime = dir_i->i_ctime = ITIME(je32_to_cpu(rd->mctime));
695 jffs2_free_raw_dirent(rd);
697 /* Link the fd into the inode's list, obsoleting an old
699 jffs2_add_fd_to_list(c, fd, &dir_f->dents);
702 jffs2_complete_reservation(c);
704 d_instantiate(dentry, inode);
709 static int jffs2_rename (struct inode *old_dir_i, struct dentry *old_dentry,
710 struct inode *new_dir_i, struct dentry *new_dentry)
713 struct jffs2_sb_info *c = JFFS2_SB_INFO(old_dir_i->i_sb);
714 struct jffs2_inode_info *victim_f = NULL;
717 /* The VFS will check for us and prevent trying to rename a
718 * file over a directory and vice versa, but if it's a directory,
719 * the VFS can't check whether the victim is empty. The filesystem
720 * needs to do that for itself.
722 if (new_dentry->d_inode) {
723 victim_f = JFFS2_INODE_INFO(new_dentry->d_inode);
724 if (S_ISDIR(new_dentry->d_inode->i_mode)) {
725 struct jffs2_full_dirent *fd;
727 down(&victim_f->sem);
728 for (fd = victim_f->dents; fd; fd = fd->next) {
738 /* XXX: We probably ought to alloc enough space for
739 both nodes at the same time. Writing the new link,
740 then getting -ENOSPC, is quite bad :)
743 /* Make a hard link */
745 /* XXX: This is ugly */
746 type = (old_dentry->d_inode->i_mode & S_IFMT) >> 12;
747 if (!type) type = DT_REG;
749 ret = jffs2_do_link(c, JFFS2_INODE_INFO(new_dir_i),
750 old_dentry->d_inode->i_ino, type,
751 new_dentry->d_name.name, new_dentry->d_name.len);
757 /* There was a victim. Kill it off nicely */
758 new_dentry->d_inode->i_nlink--;
759 /* Don't oops if the victim was a dirent pointing to an
760 inode which didn't exist. */
761 if (victim_f->inocache) {
762 down(&victim_f->sem);
763 victim_f->inocache->nlink--;
768 /* If it was a directory we moved, and there was no victim,
769 increase i_nlink on its new parent */
770 if (S_ISDIR(old_dentry->d_inode->i_mode) && !victim_f)
771 new_dir_i->i_nlink++;
773 /* Unlink the original */
774 ret = jffs2_do_unlink(c, JFFS2_INODE_INFO(old_dir_i),
775 old_dentry->d_name.name, old_dentry->d_name.len, NULL);
777 /* We don't touch inode->i_nlink */
780 /* Oh shit. We really ought to make a single node which can do both atomically */
781 struct jffs2_inode_info *f = JFFS2_INODE_INFO(old_dentry->d_inode);
783 old_dentry->d_inode->i_nlink++;
785 f->inocache->nlink++;
788 printk(KERN_NOTICE "jffs2_rename(): Link succeeded, unlink failed (err %d). You now have a hard link\n", ret);
789 /* Might as well let the VFS know */
790 d_instantiate(new_dentry, old_dentry->d_inode);
791 atomic_inc(&old_dentry->d_inode->i_count);
795 if (S_ISDIR(old_dentry->d_inode->i_mode))
796 old_dir_i->i_nlink--;