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 1.90 2005/11/07 11:14:39 gleixner Exp $
14 #include <linux/kernel.h>
15 #include <linux/slab.h>
17 #include <linux/crc32.h>
18 #include <linux/jffs2.h>
19 #include "jffs2_fs_i.h"
20 #include "jffs2_fs_sb.h"
21 #include <linux/time.h>
24 static int jffs2_readdir (struct file *, void *, filldir_t);
26 static int jffs2_create (struct inode *,struct dentry *,int,
28 static struct dentry *jffs2_lookup (struct inode *,struct dentry *,
30 static int jffs2_link (struct dentry *,struct inode *,struct dentry *);
31 static int jffs2_unlink (struct inode *,struct dentry *);
32 static int jffs2_symlink (struct inode *,struct dentry *,const char *);
33 static int jffs2_mkdir (struct inode *,struct dentry *,int);
34 static int jffs2_rmdir (struct inode *,struct dentry *);
35 static int jffs2_mknod (struct inode *,struct dentry *,int,dev_t);
36 static int jffs2_rename (struct inode *, struct dentry *,
37 struct inode *, struct dentry *);
39 const struct file_operations jffs2_dir_operations =
41 .read = generic_read_dir,
42 .readdir = jffs2_readdir,
48 const struct inode_operations jffs2_dir_inode_operations =
50 .create = jffs2_create,
51 .lookup = jffs2_lookup,
53 .unlink = jffs2_unlink,
54 .symlink = jffs2_symlink,
58 .rename = jffs2_rename,
59 .permission = jffs2_permission,
60 .setattr = jffs2_setattr,
61 .setxattr = jffs2_setxattr,
62 .getxattr = jffs2_getxattr,
63 .listxattr = jffs2_listxattr,
64 .removexattr = jffs2_removexattr
67 /***********************************************************************/
70 /* We keep the dirent list sorted in increasing order of name hash,
71 and we use the same hash function as the dentries. Makes this
74 static struct dentry *jffs2_lookup(struct inode *dir_i, struct dentry *target,
77 struct jffs2_inode_info *dir_f;
78 struct jffs2_sb_info *c;
79 struct jffs2_full_dirent *fd = NULL, *fd_list;
81 struct inode *inode = NULL;
83 D1(printk(KERN_DEBUG "jffs2_lookup()\n"));
85 if (target->d_name.len > JFFS2_MAX_NAME_LEN)
86 return ERR_PTR(-ENAMETOOLONG);
88 dir_f = JFFS2_INODE_INFO(dir_i);
89 c = JFFS2_SB_INFO(dir_i->i_sb);
93 /* NB: The 2.2 backport will need to explicitly check for '.' and '..' here */
94 for (fd_list = dir_f->dents; fd_list && fd_list->nhash <= target->d_name.hash; fd_list = fd_list->next) {
95 if (fd_list->nhash == target->d_name.hash &&
96 (!fd || fd_list->version > fd->version) &&
97 strlen(fd_list->name) == target->d_name.len &&
98 !strncmp(fd_list->name, target->d_name.name, target->d_name.len)) {
106 inode = iget(dir_i->i_sb, ino);
108 printk(KERN_WARNING "iget() failed for ino #%u\n", ino);
109 return (ERR_PTR(-EIO));
113 d_add(target, inode);
118 /***********************************************************************/
121 static int jffs2_readdir(struct file *filp, void *dirent, filldir_t filldir)
123 struct jffs2_inode_info *f;
124 struct jffs2_sb_info *c;
125 struct inode *inode = filp->f_path.dentry->d_inode;
126 struct jffs2_full_dirent *fd;
127 unsigned long offset, curofs;
129 D1(printk(KERN_DEBUG "jffs2_readdir() for dir_i #%lu\n", filp->f_path.dentry->d_inode->i_ino));
131 f = JFFS2_INODE_INFO(inode);
132 c = JFFS2_SB_INFO(inode->i_sb);
134 offset = filp->f_pos;
137 D1(printk(KERN_DEBUG "Dirent 0: \".\", ino #%lu\n", inode->i_ino));
138 if (filldir(dirent, ".", 1, 0, inode->i_ino, DT_DIR) < 0)
143 unsigned long pino = parent_ino(filp->f_path.dentry);
144 D1(printk(KERN_DEBUG "Dirent 1: \"..\", ino #%lu\n", pino));
145 if (filldir(dirent, "..", 2, 1, pino, DT_DIR) < 0)
152 for (fd = f->dents; fd; fd = fd->next) {
155 /* First loop: curofs = 2; offset = 2 */
156 if (curofs < offset) {
157 D2(printk(KERN_DEBUG "Skipping dirent: \"%s\", ino #%u, type %d, because curofs %ld < offset %ld\n",
158 fd->name, fd->ino, fd->type, curofs, offset));
162 D2(printk(KERN_DEBUG "Skipping deletion dirent \"%s\"\n", fd->name));
166 D2(printk(KERN_DEBUG "Dirent %ld: \"%s\", ino #%u, type %d\n", offset, fd->name, fd->ino, fd->type));
167 if (filldir(dirent, fd->name, strlen(fd->name), offset, fd->ino, fd->type) < 0)
173 filp->f_pos = offset;
177 /***********************************************************************/
180 static int jffs2_create(struct inode *dir_i, struct dentry *dentry, int mode,
181 struct nameidata *nd)
183 struct jffs2_raw_inode *ri;
184 struct jffs2_inode_info *f, *dir_f;
185 struct jffs2_sb_info *c;
189 ri = jffs2_alloc_raw_inode();
193 c = JFFS2_SB_INFO(dir_i->i_sb);
195 D1(printk(KERN_DEBUG "jffs2_create()\n"));
197 inode = jffs2_new_inode(dir_i, mode, ri);
200 D1(printk(KERN_DEBUG "jffs2_new_inode() failed\n"));
201 jffs2_free_raw_inode(ri);
202 return PTR_ERR(inode);
205 inode->i_op = &jffs2_file_inode_operations;
206 inode->i_fop = &jffs2_file_operations;
207 inode->i_mapping->a_ops = &jffs2_file_address_operations;
208 inode->i_mapping->nrpages = 0;
210 f = JFFS2_INODE_INFO(inode);
211 dir_f = JFFS2_INODE_INFO(dir_i);
213 ret = jffs2_do_create(c, dir_f, f, ri,
214 dentry->d_name.name, dentry->d_name.len);
219 ret = jffs2_init_security(inode, dir_i);
222 ret = jffs2_init_acl(inode, dir_i);
226 dir_i->i_mtime = dir_i->i_ctime = ITIME(je32_to_cpu(ri->ctime));
228 jffs2_free_raw_inode(ri);
229 d_instantiate(dentry, inode);
231 D1(printk(KERN_DEBUG "jffs2_create: Created ino #%lu with mode %o, nlink %d(%d). nrpages %ld\n",
232 inode->i_ino, inode->i_mode, inode->i_nlink, f->inocache->nlink, inode->i_mapping->nrpages));
236 make_bad_inode(inode);
238 jffs2_free_raw_inode(ri);
242 /***********************************************************************/
245 static int jffs2_unlink(struct inode *dir_i, struct dentry *dentry)
247 struct jffs2_sb_info *c = JFFS2_SB_INFO(dir_i->i_sb);
248 struct jffs2_inode_info *dir_f = JFFS2_INODE_INFO(dir_i);
249 struct jffs2_inode_info *dead_f = JFFS2_INODE_INFO(dentry->d_inode);
251 uint32_t now = get_seconds();
253 ret = jffs2_do_unlink(c, dir_f, dentry->d_name.name,
254 dentry->d_name.len, dead_f, now);
255 if (dead_f->inocache)
256 dentry->d_inode->i_nlink = dead_f->inocache->nlink;
258 dir_i->i_mtime = dir_i->i_ctime = ITIME(now);
261 /***********************************************************************/
264 static int jffs2_link (struct dentry *old_dentry, struct inode *dir_i, struct dentry *dentry)
266 struct jffs2_sb_info *c = JFFS2_SB_INFO(old_dentry->d_inode->i_sb);
267 struct jffs2_inode_info *f = JFFS2_INODE_INFO(old_dentry->d_inode);
268 struct jffs2_inode_info *dir_f = JFFS2_INODE_INFO(dir_i);
273 /* Don't let people make hard links to bad inodes. */
277 if (S_ISDIR(old_dentry->d_inode->i_mode))
280 /* XXX: This is ugly */
281 type = (old_dentry->d_inode->i_mode & S_IFMT) >> 12;
282 if (!type) type = DT_REG;
285 ret = jffs2_do_link(c, dir_f, f->inocache->ino, type, dentry->d_name.name, dentry->d_name.len, now);
289 old_dentry->d_inode->i_nlink = ++f->inocache->nlink;
291 d_instantiate(dentry, old_dentry->d_inode);
292 dir_i->i_mtime = dir_i->i_ctime = ITIME(now);
293 atomic_inc(&old_dentry->d_inode->i_count);
298 /***********************************************************************/
300 static int jffs2_symlink (struct inode *dir_i, struct dentry *dentry, const char *target)
302 struct jffs2_inode_info *f, *dir_f;
303 struct jffs2_sb_info *c;
305 struct jffs2_raw_inode *ri;
306 struct jffs2_raw_dirent *rd;
307 struct jffs2_full_dnode *fn;
308 struct jffs2_full_dirent *fd;
311 int ret, targetlen = strlen(target);
313 /* FIXME: If you care. We'd need to use frags for the target
314 if it grows much more than this */
318 ri = jffs2_alloc_raw_inode();
323 c = JFFS2_SB_INFO(dir_i->i_sb);
325 /* Try to reserve enough space for both node and dirent.
326 * Just the node will do for now, though
328 namelen = dentry->d_name.len;
329 ret = jffs2_reserve_space(c, sizeof(*ri) + targetlen, &alloclen,
330 ALLOC_NORMAL, JFFS2_SUMMARY_INODE_SIZE);
333 jffs2_free_raw_inode(ri);
337 inode = jffs2_new_inode(dir_i, S_IFLNK | S_IRWXUGO, ri);
340 jffs2_free_raw_inode(ri);
341 jffs2_complete_reservation(c);
342 return PTR_ERR(inode);
345 inode->i_op = &jffs2_symlink_inode_operations;
347 f = JFFS2_INODE_INFO(inode);
349 inode->i_size = targetlen;
350 ri->isize = ri->dsize = ri->csize = cpu_to_je32(inode->i_size);
351 ri->totlen = cpu_to_je32(sizeof(*ri) + inode->i_size);
352 ri->hdr_crc = cpu_to_je32(crc32(0, ri, sizeof(struct jffs2_unknown_node)-4));
354 ri->compr = JFFS2_COMPR_NONE;
355 ri->data_crc = cpu_to_je32(crc32(0, target, targetlen));
356 ri->node_crc = cpu_to_je32(crc32(0, ri, sizeof(*ri)-8));
358 fn = jffs2_write_dnode(c, f, ri, target, targetlen, ALLOC_NORMAL);
360 jffs2_free_raw_inode(ri);
363 /* Eeek. Wave bye bye */
365 jffs2_complete_reservation(c);
366 jffs2_clear_inode(inode);
370 /* We use f->target field to store the target path. */
371 f->target = kmalloc(targetlen + 1, GFP_KERNEL);
373 printk(KERN_WARNING "Can't allocate %d bytes of memory\n", targetlen + 1);
375 jffs2_complete_reservation(c);
376 jffs2_clear_inode(inode);
380 memcpy(f->target, target, targetlen + 1);
381 D1(printk(KERN_DEBUG "jffs2_symlink: symlink's target '%s' cached\n", (char *)f->target));
383 /* No data here. Only a metadata node, which will be
384 obsoleted by the first data write
389 jffs2_complete_reservation(c);
391 ret = jffs2_init_security(inode, dir_i);
393 jffs2_clear_inode(inode);
396 ret = jffs2_init_acl(inode, dir_i);
398 jffs2_clear_inode(inode);
402 ret = jffs2_reserve_space(c, sizeof(*rd)+namelen, &alloclen,
403 ALLOC_NORMAL, JFFS2_SUMMARY_DIRENT_SIZE(namelen));
406 jffs2_clear_inode(inode);
410 rd = jffs2_alloc_raw_dirent();
412 /* Argh. Now we treat it like a normal delete */
413 jffs2_complete_reservation(c);
414 jffs2_clear_inode(inode);
418 dir_f = JFFS2_INODE_INFO(dir_i);
421 rd->magic = cpu_to_je16(JFFS2_MAGIC_BITMASK);
422 rd->nodetype = cpu_to_je16(JFFS2_NODETYPE_DIRENT);
423 rd->totlen = cpu_to_je32(sizeof(*rd) + namelen);
424 rd->hdr_crc = cpu_to_je32(crc32(0, rd, sizeof(struct jffs2_unknown_node)-4));
426 rd->pino = cpu_to_je32(dir_i->i_ino);
427 rd->version = cpu_to_je32(++dir_f->highest_version);
428 rd->ino = cpu_to_je32(inode->i_ino);
429 rd->mctime = cpu_to_je32(get_seconds());
432 rd->node_crc = cpu_to_je32(crc32(0, rd, sizeof(*rd)-8));
433 rd->name_crc = cpu_to_je32(crc32(0, dentry->d_name.name, namelen));
435 fd = jffs2_write_dirent(c, dir_f, rd, dentry->d_name.name, namelen, ALLOC_NORMAL);
438 /* dirent failed to write. Delete the inode normally
439 as if it were the final unlink() */
440 jffs2_complete_reservation(c);
441 jffs2_free_raw_dirent(rd);
443 jffs2_clear_inode(inode);
447 dir_i->i_mtime = dir_i->i_ctime = ITIME(je32_to_cpu(rd->mctime));
449 jffs2_free_raw_dirent(rd);
451 /* Link the fd into the inode's list, obsoleting an old
453 jffs2_add_fd_to_list(c, fd, &dir_f->dents);
456 jffs2_complete_reservation(c);
458 d_instantiate(dentry, inode);
463 static int jffs2_mkdir (struct inode *dir_i, struct dentry *dentry, int mode)
465 struct jffs2_inode_info *f, *dir_f;
466 struct jffs2_sb_info *c;
468 struct jffs2_raw_inode *ri;
469 struct jffs2_raw_dirent *rd;
470 struct jffs2_full_dnode *fn;
471 struct jffs2_full_dirent *fd;
478 ri = jffs2_alloc_raw_inode();
482 c = JFFS2_SB_INFO(dir_i->i_sb);
484 /* Try to reserve enough space for both node and dirent.
485 * Just the node will do for now, though
487 namelen = dentry->d_name.len;
488 ret = jffs2_reserve_space(c, sizeof(*ri), &alloclen, ALLOC_NORMAL,
489 JFFS2_SUMMARY_INODE_SIZE);
492 jffs2_free_raw_inode(ri);
496 inode = jffs2_new_inode(dir_i, mode, ri);
499 jffs2_free_raw_inode(ri);
500 jffs2_complete_reservation(c);
501 return PTR_ERR(inode);
504 inode->i_op = &jffs2_dir_inode_operations;
505 inode->i_fop = &jffs2_dir_operations;
506 /* Directories get nlink 2 at start */
509 f = JFFS2_INODE_INFO(inode);
511 ri->data_crc = cpu_to_je32(0);
512 ri->node_crc = cpu_to_je32(crc32(0, ri, sizeof(*ri)-8));
514 fn = jffs2_write_dnode(c, f, ri, NULL, 0, ALLOC_NORMAL);
516 jffs2_free_raw_inode(ri);
519 /* Eeek. Wave bye bye */
521 jffs2_complete_reservation(c);
522 jffs2_clear_inode(inode);
525 /* No data here. Only a metadata node, which will be
526 obsoleted by the first data write
531 jffs2_complete_reservation(c);
533 ret = jffs2_init_security(inode, dir_i);
535 jffs2_clear_inode(inode);
538 ret = jffs2_init_acl(inode, dir_i);
540 jffs2_clear_inode(inode);
544 ret = jffs2_reserve_space(c, sizeof(*rd)+namelen, &alloclen,
545 ALLOC_NORMAL, JFFS2_SUMMARY_DIRENT_SIZE(namelen));
548 jffs2_clear_inode(inode);
552 rd = jffs2_alloc_raw_dirent();
554 /* Argh. Now we treat it like a normal delete */
555 jffs2_complete_reservation(c);
556 jffs2_clear_inode(inode);
560 dir_f = JFFS2_INODE_INFO(dir_i);
563 rd->magic = cpu_to_je16(JFFS2_MAGIC_BITMASK);
564 rd->nodetype = cpu_to_je16(JFFS2_NODETYPE_DIRENT);
565 rd->totlen = cpu_to_je32(sizeof(*rd) + namelen);
566 rd->hdr_crc = cpu_to_je32(crc32(0, rd, sizeof(struct jffs2_unknown_node)-4));
568 rd->pino = cpu_to_je32(dir_i->i_ino);
569 rd->version = cpu_to_je32(++dir_f->highest_version);
570 rd->ino = cpu_to_je32(inode->i_ino);
571 rd->mctime = cpu_to_je32(get_seconds());
574 rd->node_crc = cpu_to_je32(crc32(0, rd, sizeof(*rd)-8));
575 rd->name_crc = cpu_to_je32(crc32(0, dentry->d_name.name, namelen));
577 fd = jffs2_write_dirent(c, dir_f, rd, dentry->d_name.name, namelen, ALLOC_NORMAL);
580 /* dirent failed to write. Delete the inode normally
581 as if it were the final unlink() */
582 jffs2_complete_reservation(c);
583 jffs2_free_raw_dirent(rd);
585 jffs2_clear_inode(inode);
589 dir_i->i_mtime = dir_i->i_ctime = ITIME(je32_to_cpu(rd->mctime));
592 jffs2_free_raw_dirent(rd);
594 /* Link the fd into the inode's list, obsoleting an old
596 jffs2_add_fd_to_list(c, fd, &dir_f->dents);
599 jffs2_complete_reservation(c);
601 d_instantiate(dentry, inode);
605 static int jffs2_rmdir (struct inode *dir_i, struct dentry *dentry)
607 struct jffs2_inode_info *f = JFFS2_INODE_INFO(dentry->d_inode);
608 struct jffs2_full_dirent *fd;
611 for (fd = f->dents ; fd; fd = fd->next) {
615 ret = jffs2_unlink(dir_i, dentry);
621 static int jffs2_mknod (struct inode *dir_i, struct dentry *dentry, int mode, dev_t rdev)
623 struct jffs2_inode_info *f, *dir_f;
624 struct jffs2_sb_info *c;
626 struct jffs2_raw_inode *ri;
627 struct jffs2_raw_dirent *rd;
628 struct jffs2_full_dnode *fn;
629 struct jffs2_full_dirent *fd;
631 union jffs2_device_node dev;
636 if (!new_valid_dev(rdev))
639 ri = jffs2_alloc_raw_inode();
643 c = JFFS2_SB_INFO(dir_i->i_sb);
645 if (S_ISBLK(mode) || S_ISCHR(mode))
646 devlen = jffs2_encode_dev(&dev, rdev);
648 /* Try to reserve enough space for both node and dirent.
649 * Just the node will do for now, though
651 namelen = dentry->d_name.len;
652 ret = jffs2_reserve_space(c, sizeof(*ri) + devlen, &alloclen,
653 ALLOC_NORMAL, JFFS2_SUMMARY_INODE_SIZE);
656 jffs2_free_raw_inode(ri);
660 inode = jffs2_new_inode(dir_i, mode, ri);
663 jffs2_free_raw_inode(ri);
664 jffs2_complete_reservation(c);
665 return PTR_ERR(inode);
667 inode->i_op = &jffs2_file_inode_operations;
668 init_special_inode(inode, inode->i_mode, rdev);
670 f = JFFS2_INODE_INFO(inode);
672 ri->dsize = ri->csize = cpu_to_je32(devlen);
673 ri->totlen = cpu_to_je32(sizeof(*ri) + devlen);
674 ri->hdr_crc = cpu_to_je32(crc32(0, ri, sizeof(struct jffs2_unknown_node)-4));
676 ri->compr = JFFS2_COMPR_NONE;
677 ri->data_crc = cpu_to_je32(crc32(0, &dev, devlen));
678 ri->node_crc = cpu_to_je32(crc32(0, ri, sizeof(*ri)-8));
680 fn = jffs2_write_dnode(c, f, ri, (char *)&dev, devlen, ALLOC_NORMAL);
682 jffs2_free_raw_inode(ri);
685 /* Eeek. Wave bye bye */
687 jffs2_complete_reservation(c);
688 jffs2_clear_inode(inode);
691 /* No data here. Only a metadata node, which will be
692 obsoleted by the first data write
697 jffs2_complete_reservation(c);
699 ret = jffs2_init_security(inode, dir_i);
701 jffs2_clear_inode(inode);
704 ret = jffs2_init_acl(inode, dir_i);
706 jffs2_clear_inode(inode);
710 ret = jffs2_reserve_space(c, sizeof(*rd)+namelen, &alloclen,
711 ALLOC_NORMAL, JFFS2_SUMMARY_DIRENT_SIZE(namelen));
714 jffs2_clear_inode(inode);
718 rd = jffs2_alloc_raw_dirent();
720 /* Argh. Now we treat it like a normal delete */
721 jffs2_complete_reservation(c);
722 jffs2_clear_inode(inode);
726 dir_f = JFFS2_INODE_INFO(dir_i);
729 rd->magic = cpu_to_je16(JFFS2_MAGIC_BITMASK);
730 rd->nodetype = cpu_to_je16(JFFS2_NODETYPE_DIRENT);
731 rd->totlen = cpu_to_je32(sizeof(*rd) + namelen);
732 rd->hdr_crc = cpu_to_je32(crc32(0, rd, sizeof(struct jffs2_unknown_node)-4));
734 rd->pino = cpu_to_je32(dir_i->i_ino);
735 rd->version = cpu_to_je32(++dir_f->highest_version);
736 rd->ino = cpu_to_je32(inode->i_ino);
737 rd->mctime = cpu_to_je32(get_seconds());
740 /* XXX: This is ugly. */
741 rd->type = (mode & S_IFMT) >> 12;
743 rd->node_crc = cpu_to_je32(crc32(0, rd, sizeof(*rd)-8));
744 rd->name_crc = cpu_to_je32(crc32(0, dentry->d_name.name, namelen));
746 fd = jffs2_write_dirent(c, dir_f, rd, dentry->d_name.name, namelen, ALLOC_NORMAL);
749 /* dirent failed to write. Delete the inode normally
750 as if it were the final unlink() */
751 jffs2_complete_reservation(c);
752 jffs2_free_raw_dirent(rd);
754 jffs2_clear_inode(inode);
758 dir_i->i_mtime = dir_i->i_ctime = ITIME(je32_to_cpu(rd->mctime));
760 jffs2_free_raw_dirent(rd);
762 /* Link the fd into the inode's list, obsoleting an old
764 jffs2_add_fd_to_list(c, fd, &dir_f->dents);
767 jffs2_complete_reservation(c);
769 d_instantiate(dentry, inode);
774 static int jffs2_rename (struct inode *old_dir_i, struct dentry *old_dentry,
775 struct inode *new_dir_i, struct dentry *new_dentry)
778 struct jffs2_sb_info *c = JFFS2_SB_INFO(old_dir_i->i_sb);
779 struct jffs2_inode_info *victim_f = NULL;
783 /* The VFS will check for us and prevent trying to rename a
784 * file over a directory and vice versa, but if it's a directory,
785 * the VFS can't check whether the victim is empty. The filesystem
786 * needs to do that for itself.
788 if (new_dentry->d_inode) {
789 victim_f = JFFS2_INODE_INFO(new_dentry->d_inode);
790 if (S_ISDIR(new_dentry->d_inode->i_mode)) {
791 struct jffs2_full_dirent *fd;
793 down(&victim_f->sem);
794 for (fd = victim_f->dents; fd; fd = fd->next) {
804 /* XXX: We probably ought to alloc enough space for
805 both nodes at the same time. Writing the new link,
806 then getting -ENOSPC, is quite bad :)
809 /* Make a hard link */
811 /* XXX: This is ugly */
812 type = (old_dentry->d_inode->i_mode & S_IFMT) >> 12;
813 if (!type) type = DT_REG;
816 ret = jffs2_do_link(c, JFFS2_INODE_INFO(new_dir_i),
817 old_dentry->d_inode->i_ino, type,
818 new_dentry->d_name.name, new_dentry->d_name.len, now);
824 /* There was a victim. Kill it off nicely */
825 drop_nlink(new_dentry->d_inode);
826 /* Don't oops if the victim was a dirent pointing to an
827 inode which didn't exist. */
828 if (victim_f->inocache) {
829 down(&victim_f->sem);
830 victim_f->inocache->nlink--;
835 /* If it was a directory we moved, and there was no victim,
836 increase i_nlink on its new parent */
837 if (S_ISDIR(old_dentry->d_inode->i_mode) && !victim_f)
838 inc_nlink(new_dir_i);
840 /* Unlink the original */
841 ret = jffs2_do_unlink(c, JFFS2_INODE_INFO(old_dir_i),
842 old_dentry->d_name.name, old_dentry->d_name.len, NULL, now);
844 /* We don't touch inode->i_nlink */
847 /* Oh shit. We really ought to make a single node which can do both atomically */
848 struct jffs2_inode_info *f = JFFS2_INODE_INFO(old_dentry->d_inode);
850 inc_nlink(old_dentry->d_inode);
852 f->inocache->nlink++;
855 printk(KERN_NOTICE "jffs2_rename(): Link succeeded, unlink failed (err %d). You now have a hard link\n", ret);
856 /* Might as well let the VFS know */
857 d_instantiate(new_dentry, old_dentry->d_inode);
858 atomic_inc(&old_dentry->d_inode->i_count);
859 new_dir_i->i_mtime = new_dir_i->i_ctime = ITIME(now);
863 if (S_ISDIR(old_dentry->d_inode->i_mode))
864 drop_nlink(old_dir_i);
866 new_dir_i->i_mtime = new_dir_i->i_ctime = old_dir_i->i_mtime = old_dir_i->i_ctime = ITIME(now);