2 * JFFS2 -- Journalling Flash File System, Version 2.
4 * Copyright © 2001-2007 Red Hat, Inc.
5 * Copyright © 2004-2010 David Woodhouse <dwmw2@infradead.org>
7 * Created by David Woodhouse <dwmw2@infradead.org>
9 * For licensing information, see the file 'LICENCE' in this directory.
13 #include <linux/kernel.h>
14 #include <linux/slab.h>
16 #include <linux/crc32.h>
17 #include <linux/jffs2.h>
18 #include "jffs2_fs_i.h"
19 #include "jffs2_fs_sb.h"
20 #include <linux/time.h>
23 static int jffs2_readdir (struct file *, void *, filldir_t);
25 static int jffs2_create (struct inode *,struct dentry *,int,
27 static struct dentry *jffs2_lookup (struct inode *,struct dentry *,
29 static int jffs2_link (struct dentry *,struct inode *,struct dentry *);
30 static int jffs2_unlink (struct inode *,struct dentry *);
31 static int jffs2_symlink (struct inode *,struct dentry *,const char *);
32 static int jffs2_mkdir (struct inode *,struct dentry *,int);
33 static int jffs2_rmdir (struct inode *,struct dentry *);
34 static int jffs2_mknod (struct inode *,struct dentry *,int,dev_t);
35 static int jffs2_rename (struct inode *, struct dentry *,
36 struct inode *, struct dentry *);
38 const struct file_operations jffs2_dir_operations =
40 .read = generic_read_dir,
41 .readdir = jffs2_readdir,
42 .unlocked_ioctl=jffs2_ioctl,
44 .llseek = generic_file_llseek,
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 .check_acl = jffs2_check_acl,
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_full_dirent *fd = NULL, *fd_list;
80 struct inode *inode = NULL;
82 D1(printk(KERN_DEBUG "jffs2_lookup()\n"));
84 if (target->d_name.len > JFFS2_MAX_NAME_LEN)
85 return ERR_PTR(-ENAMETOOLONG);
87 dir_f = JFFS2_INODE_INFO(dir_i);
89 mutex_lock(&dir_f->sem);
91 /* NB: The 2.2 backport will need to explicitly check for '.' and '..' here */
92 for (fd_list = dir_f->dents; fd_list && fd_list->nhash <= target->d_name.hash; fd_list = fd_list->next) {
93 if (fd_list->nhash == target->d_name.hash &&
94 (!fd || fd_list->version > fd->version) &&
95 strlen(fd_list->name) == target->d_name.len &&
96 !strncmp(fd_list->name, target->d_name.name, target->d_name.len)) {
102 mutex_unlock(&dir_f->sem);
104 inode = jffs2_iget(dir_i->i_sb, ino);
106 printk(KERN_WARNING "iget() failed for ino #%u\n", ino);
107 return ERR_CAST(inode);
111 return d_splice_alias(inode, target);
114 /***********************************************************************/
117 static int jffs2_readdir(struct file *filp, void *dirent, filldir_t filldir)
119 struct jffs2_inode_info *f;
120 struct inode *inode = filp->f_path.dentry->d_inode;
121 struct jffs2_full_dirent *fd;
122 unsigned long offset, curofs;
124 D1(printk(KERN_DEBUG "jffs2_readdir() for dir_i #%lu\n", filp->f_path.dentry->d_inode->i_ino));
126 f = JFFS2_INODE_INFO(inode);
128 offset = filp->f_pos;
131 D1(printk(KERN_DEBUG "Dirent 0: \".\", ino #%lu\n", inode->i_ino));
132 if (filldir(dirent, ".", 1, 0, inode->i_ino, DT_DIR) < 0)
137 unsigned long pino = parent_ino(filp->f_path.dentry);
138 D1(printk(KERN_DEBUG "Dirent 1: \"..\", ino #%lu\n", pino));
139 if (filldir(dirent, "..", 2, 1, pino, DT_DIR) < 0)
146 for (fd = f->dents; fd; fd = fd->next) {
149 /* First loop: curofs = 2; offset = 2 */
150 if (curofs < offset) {
151 D2(printk(KERN_DEBUG "Skipping dirent: \"%s\", ino #%u, type %d, because curofs %ld < offset %ld\n",
152 fd->name, fd->ino, fd->type, curofs, offset));
156 D2(printk(KERN_DEBUG "Skipping deletion dirent \"%s\"\n", fd->name));
160 D2(printk(KERN_DEBUG "Dirent %ld: \"%s\", ino #%u, type %d\n", offset, fd->name, fd->ino, fd->type));
161 if (filldir(dirent, fd->name, strlen(fd->name), offset, fd->ino, fd->type) < 0)
165 mutex_unlock(&f->sem);
167 filp->f_pos = offset;
171 /***********************************************************************/
174 static int jffs2_create(struct inode *dir_i, struct dentry *dentry, int mode,
175 struct nameidata *nd)
177 struct jffs2_raw_inode *ri;
178 struct jffs2_inode_info *f, *dir_f;
179 struct jffs2_sb_info *c;
183 ri = jffs2_alloc_raw_inode();
187 c = JFFS2_SB_INFO(dir_i->i_sb);
189 D1(printk(KERN_DEBUG "jffs2_create()\n"));
191 inode = jffs2_new_inode(dir_i, mode, ri);
194 D1(printk(KERN_DEBUG "jffs2_new_inode() failed\n"));
195 jffs2_free_raw_inode(ri);
196 return PTR_ERR(inode);
199 inode->i_op = &jffs2_file_inode_operations;
200 inode->i_fop = &jffs2_file_operations;
201 inode->i_mapping->a_ops = &jffs2_file_address_operations;
202 inode->i_mapping->nrpages = 0;
204 f = JFFS2_INODE_INFO(inode);
205 dir_f = JFFS2_INODE_INFO(dir_i);
207 /* jffs2_do_create() will want to lock it, _after_ reserving
208 space and taking c-alloc_sem. If we keep it locked here,
209 lockdep gets unhappy (although it's a false positive;
210 nothing else will be looking at this inode yet so there's
211 no chance of AB-BA deadlock involving its f->sem). */
212 mutex_unlock(&f->sem);
214 ret = jffs2_do_create(c, dir_f, f, ri, &dentry->d_name);
218 dir_i->i_mtime = dir_i->i_ctime = ITIME(je32_to_cpu(ri->ctime));
220 jffs2_free_raw_inode(ri);
222 D1(printk(KERN_DEBUG "jffs2_create: Created ino #%lu with mode %o, nlink %d(%d). nrpages %ld\n",
223 inode->i_ino, inode->i_mode, inode->i_nlink,
224 f->inocache->pino_nlink, inode->i_mapping->nrpages));
226 d_instantiate(dentry, inode);
227 unlock_new_inode(inode);
232 jffs2_free_raw_inode(ri);
236 /***********************************************************************/
239 static int jffs2_unlink(struct inode *dir_i, struct dentry *dentry)
241 struct jffs2_sb_info *c = JFFS2_SB_INFO(dir_i->i_sb);
242 struct jffs2_inode_info *dir_f = JFFS2_INODE_INFO(dir_i);
243 struct jffs2_inode_info *dead_f = JFFS2_INODE_INFO(dentry->d_inode);
245 uint32_t now = get_seconds();
247 ret = jffs2_do_unlink(c, dir_f, dentry->d_name.name,
248 dentry->d_name.len, dead_f, now);
249 if (dead_f->inocache)
250 dentry->d_inode->i_nlink = dead_f->inocache->pino_nlink;
252 dir_i->i_mtime = dir_i->i_ctime = ITIME(now);
255 /***********************************************************************/
258 static int jffs2_link (struct dentry *old_dentry, struct inode *dir_i, struct dentry *dentry)
260 struct jffs2_sb_info *c = JFFS2_SB_INFO(old_dentry->d_inode->i_sb);
261 struct jffs2_inode_info *f = JFFS2_INODE_INFO(old_dentry->d_inode);
262 struct jffs2_inode_info *dir_f = JFFS2_INODE_INFO(dir_i);
267 /* Don't let people make hard links to bad inodes. */
271 if (S_ISDIR(old_dentry->d_inode->i_mode))
274 /* XXX: This is ugly */
275 type = (old_dentry->d_inode->i_mode & S_IFMT) >> 12;
276 if (!type) type = DT_REG;
279 ret = jffs2_do_link(c, dir_f, f->inocache->ino, type, dentry->d_name.name, dentry->d_name.len, now);
283 old_dentry->d_inode->i_nlink = ++f->inocache->pino_nlink;
284 mutex_unlock(&f->sem);
285 d_instantiate(dentry, old_dentry->d_inode);
286 dir_i->i_mtime = dir_i->i_ctime = ITIME(now);
287 ihold(old_dentry->d_inode);
292 /***********************************************************************/
294 static int jffs2_symlink (struct inode *dir_i, struct dentry *dentry, const char *target)
296 struct jffs2_inode_info *f, *dir_f;
297 struct jffs2_sb_info *c;
299 struct jffs2_raw_inode *ri;
300 struct jffs2_raw_dirent *rd;
301 struct jffs2_full_dnode *fn;
302 struct jffs2_full_dirent *fd;
305 int ret, targetlen = strlen(target);
307 /* FIXME: If you care. We'd need to use frags for the target
308 if it grows much more than this */
310 return -ENAMETOOLONG;
312 ri = jffs2_alloc_raw_inode();
317 c = JFFS2_SB_INFO(dir_i->i_sb);
319 /* Try to reserve enough space for both node and dirent.
320 * Just the node will do for now, though
322 namelen = dentry->d_name.len;
323 ret = jffs2_reserve_space(c, sizeof(*ri) + targetlen, &alloclen,
324 ALLOC_NORMAL, JFFS2_SUMMARY_INODE_SIZE);
327 jffs2_free_raw_inode(ri);
331 inode = jffs2_new_inode(dir_i, S_IFLNK | S_IRWXUGO, ri);
334 jffs2_free_raw_inode(ri);
335 jffs2_complete_reservation(c);
336 return PTR_ERR(inode);
339 inode->i_op = &jffs2_symlink_inode_operations;
341 f = JFFS2_INODE_INFO(inode);
343 inode->i_size = targetlen;
344 ri->isize = ri->dsize = ri->csize = cpu_to_je32(inode->i_size);
345 ri->totlen = cpu_to_je32(sizeof(*ri) + inode->i_size);
346 ri->hdr_crc = cpu_to_je32(crc32(0, ri, sizeof(struct jffs2_unknown_node)-4));
348 ri->compr = JFFS2_COMPR_NONE;
349 ri->data_crc = cpu_to_je32(crc32(0, target, targetlen));
350 ri->node_crc = cpu_to_je32(crc32(0, ri, sizeof(*ri)-8));
352 fn = jffs2_write_dnode(c, f, ri, target, targetlen, ALLOC_NORMAL);
354 jffs2_free_raw_inode(ri);
357 /* Eeek. Wave bye bye */
358 mutex_unlock(&f->sem);
359 jffs2_complete_reservation(c);
364 /* We use f->target field to store the target path. */
365 f->target = kmemdup(target, targetlen + 1, GFP_KERNEL);
367 printk(KERN_WARNING "Can't allocate %d bytes of memory\n", targetlen + 1);
368 mutex_unlock(&f->sem);
369 jffs2_complete_reservation(c);
374 D1(printk(KERN_DEBUG "jffs2_symlink: symlink's target '%s' cached\n", (char *)f->target));
376 /* No data here. Only a metadata node, which will be
377 obsoleted by the first data write
380 mutex_unlock(&f->sem);
382 jffs2_complete_reservation(c);
384 ret = jffs2_init_security(inode, dir_i, &dentry->d_name);
388 ret = jffs2_init_acl_post(inode);
392 ret = jffs2_reserve_space(c, sizeof(*rd)+namelen, &alloclen,
393 ALLOC_NORMAL, JFFS2_SUMMARY_DIRENT_SIZE(namelen));
397 rd = jffs2_alloc_raw_dirent();
399 /* Argh. Now we treat it like a normal delete */
400 jffs2_complete_reservation(c);
405 dir_f = JFFS2_INODE_INFO(dir_i);
406 mutex_lock(&dir_f->sem);
408 rd->magic = cpu_to_je16(JFFS2_MAGIC_BITMASK);
409 rd->nodetype = cpu_to_je16(JFFS2_NODETYPE_DIRENT);
410 rd->totlen = cpu_to_je32(sizeof(*rd) + namelen);
411 rd->hdr_crc = cpu_to_je32(crc32(0, rd, sizeof(struct jffs2_unknown_node)-4));
413 rd->pino = cpu_to_je32(dir_i->i_ino);
414 rd->version = cpu_to_je32(++dir_f->highest_version);
415 rd->ino = cpu_to_je32(inode->i_ino);
416 rd->mctime = cpu_to_je32(get_seconds());
419 rd->node_crc = cpu_to_je32(crc32(0, rd, sizeof(*rd)-8));
420 rd->name_crc = cpu_to_je32(crc32(0, dentry->d_name.name, namelen));
422 fd = jffs2_write_dirent(c, dir_f, rd, dentry->d_name.name, namelen, ALLOC_NORMAL);
425 /* dirent failed to write. Delete the inode normally
426 as if it were the final unlink() */
427 jffs2_complete_reservation(c);
428 jffs2_free_raw_dirent(rd);
429 mutex_unlock(&dir_f->sem);
434 dir_i->i_mtime = dir_i->i_ctime = ITIME(je32_to_cpu(rd->mctime));
436 jffs2_free_raw_dirent(rd);
438 /* Link the fd into the inode's list, obsoleting an old
440 jffs2_add_fd_to_list(c, fd, &dir_f->dents);
442 mutex_unlock(&dir_f->sem);
443 jffs2_complete_reservation(c);
445 d_instantiate(dentry, inode);
446 unlock_new_inode(inode);
455 static int jffs2_mkdir (struct inode *dir_i, struct dentry *dentry, int mode)
457 struct jffs2_inode_info *f, *dir_f;
458 struct jffs2_sb_info *c;
460 struct jffs2_raw_inode *ri;
461 struct jffs2_raw_dirent *rd;
462 struct jffs2_full_dnode *fn;
463 struct jffs2_full_dirent *fd;
470 ri = jffs2_alloc_raw_inode();
474 c = JFFS2_SB_INFO(dir_i->i_sb);
476 /* Try to reserve enough space for both node and dirent.
477 * Just the node will do for now, though
479 namelen = dentry->d_name.len;
480 ret = jffs2_reserve_space(c, sizeof(*ri), &alloclen, ALLOC_NORMAL,
481 JFFS2_SUMMARY_INODE_SIZE);
484 jffs2_free_raw_inode(ri);
488 inode = jffs2_new_inode(dir_i, mode, ri);
491 jffs2_free_raw_inode(ri);
492 jffs2_complete_reservation(c);
493 return PTR_ERR(inode);
496 inode->i_op = &jffs2_dir_inode_operations;
497 inode->i_fop = &jffs2_dir_operations;
499 f = JFFS2_INODE_INFO(inode);
501 /* Directories get nlink 2 at start */
503 /* but ic->pino_nlink is the parent ino# */
504 f->inocache->pino_nlink = dir_i->i_ino;
506 ri->data_crc = cpu_to_je32(0);
507 ri->node_crc = cpu_to_je32(crc32(0, ri, sizeof(*ri)-8));
509 fn = jffs2_write_dnode(c, f, ri, NULL, 0, ALLOC_NORMAL);
511 jffs2_free_raw_inode(ri);
514 /* Eeek. Wave bye bye */
515 mutex_unlock(&f->sem);
516 jffs2_complete_reservation(c);
520 /* No data here. Only a metadata node, which will be
521 obsoleted by the first data write
524 mutex_unlock(&f->sem);
526 jffs2_complete_reservation(c);
528 ret = jffs2_init_security(inode, dir_i, &dentry->d_name);
532 ret = jffs2_init_acl_post(inode);
536 ret = jffs2_reserve_space(c, sizeof(*rd)+namelen, &alloclen,
537 ALLOC_NORMAL, JFFS2_SUMMARY_DIRENT_SIZE(namelen));
541 rd = jffs2_alloc_raw_dirent();
543 /* Argh. Now we treat it like a normal delete */
544 jffs2_complete_reservation(c);
549 dir_f = JFFS2_INODE_INFO(dir_i);
550 mutex_lock(&dir_f->sem);
552 rd->magic = cpu_to_je16(JFFS2_MAGIC_BITMASK);
553 rd->nodetype = cpu_to_je16(JFFS2_NODETYPE_DIRENT);
554 rd->totlen = cpu_to_je32(sizeof(*rd) + namelen);
555 rd->hdr_crc = cpu_to_je32(crc32(0, rd, sizeof(struct jffs2_unknown_node)-4));
557 rd->pino = cpu_to_je32(dir_i->i_ino);
558 rd->version = cpu_to_je32(++dir_f->highest_version);
559 rd->ino = cpu_to_je32(inode->i_ino);
560 rd->mctime = cpu_to_je32(get_seconds());
563 rd->node_crc = cpu_to_je32(crc32(0, rd, sizeof(*rd)-8));
564 rd->name_crc = cpu_to_je32(crc32(0, dentry->d_name.name, namelen));
566 fd = jffs2_write_dirent(c, dir_f, rd, dentry->d_name.name, namelen, ALLOC_NORMAL);
569 /* dirent failed to write. Delete the inode normally
570 as if it were the final unlink() */
571 jffs2_complete_reservation(c);
572 jffs2_free_raw_dirent(rd);
573 mutex_unlock(&dir_f->sem);
578 dir_i->i_mtime = dir_i->i_ctime = ITIME(je32_to_cpu(rd->mctime));
581 jffs2_free_raw_dirent(rd);
583 /* Link the fd into the inode's list, obsoleting an old
585 jffs2_add_fd_to_list(c, fd, &dir_f->dents);
587 mutex_unlock(&dir_f->sem);
588 jffs2_complete_reservation(c);
590 d_instantiate(dentry, inode);
591 unlock_new_inode(inode);
599 static int jffs2_rmdir (struct inode *dir_i, struct dentry *dentry)
601 struct jffs2_sb_info *c = JFFS2_SB_INFO(dir_i->i_sb);
602 struct jffs2_inode_info *dir_f = JFFS2_INODE_INFO(dir_i);
603 struct jffs2_inode_info *f = JFFS2_INODE_INFO(dentry->d_inode);
604 struct jffs2_full_dirent *fd;
606 uint32_t now = get_seconds();
608 dentry_unhash(dentry);
610 for (fd = f->dents ; fd; fd = fd->next) {
615 ret = jffs2_do_unlink(c, dir_f, dentry->d_name.name,
616 dentry->d_name.len, f, now);
618 dir_i->i_mtime = dir_i->i_ctime = ITIME(now);
619 clear_nlink(dentry->d_inode);
625 static int jffs2_mknod (struct inode *dir_i, struct dentry *dentry, int mode, dev_t rdev)
627 struct jffs2_inode_info *f, *dir_f;
628 struct jffs2_sb_info *c;
630 struct jffs2_raw_inode *ri;
631 struct jffs2_raw_dirent *rd;
632 struct jffs2_full_dnode *fn;
633 struct jffs2_full_dirent *fd;
635 union jffs2_device_node dev;
640 if (!new_valid_dev(rdev))
643 ri = jffs2_alloc_raw_inode();
647 c = JFFS2_SB_INFO(dir_i->i_sb);
649 if (S_ISBLK(mode) || S_ISCHR(mode))
650 devlen = jffs2_encode_dev(&dev, rdev);
652 /* Try to reserve enough space for both node and dirent.
653 * Just the node will do for now, though
655 namelen = dentry->d_name.len;
656 ret = jffs2_reserve_space(c, sizeof(*ri) + devlen, &alloclen,
657 ALLOC_NORMAL, JFFS2_SUMMARY_INODE_SIZE);
660 jffs2_free_raw_inode(ri);
664 inode = jffs2_new_inode(dir_i, mode, ri);
667 jffs2_free_raw_inode(ri);
668 jffs2_complete_reservation(c);
669 return PTR_ERR(inode);
671 inode->i_op = &jffs2_file_inode_operations;
672 init_special_inode(inode, inode->i_mode, rdev);
674 f = JFFS2_INODE_INFO(inode);
676 ri->dsize = ri->csize = cpu_to_je32(devlen);
677 ri->totlen = cpu_to_je32(sizeof(*ri) + devlen);
678 ri->hdr_crc = cpu_to_je32(crc32(0, ri, sizeof(struct jffs2_unknown_node)-4));
680 ri->compr = JFFS2_COMPR_NONE;
681 ri->data_crc = cpu_to_je32(crc32(0, &dev, devlen));
682 ri->node_crc = cpu_to_je32(crc32(0, ri, sizeof(*ri)-8));
684 fn = jffs2_write_dnode(c, f, ri, (char *)&dev, devlen, ALLOC_NORMAL);
686 jffs2_free_raw_inode(ri);
689 /* Eeek. Wave bye bye */
690 mutex_unlock(&f->sem);
691 jffs2_complete_reservation(c);
695 /* No data here. Only a metadata node, which will be
696 obsoleted by the first data write
699 mutex_unlock(&f->sem);
701 jffs2_complete_reservation(c);
703 ret = jffs2_init_security(inode, dir_i, &dentry->d_name);
707 ret = jffs2_init_acl_post(inode);
711 ret = jffs2_reserve_space(c, sizeof(*rd)+namelen, &alloclen,
712 ALLOC_NORMAL, JFFS2_SUMMARY_DIRENT_SIZE(namelen));
716 rd = jffs2_alloc_raw_dirent();
718 /* Argh. Now we treat it like a normal delete */
719 jffs2_complete_reservation(c);
724 dir_f = JFFS2_INODE_INFO(dir_i);
725 mutex_lock(&dir_f->sem);
727 rd->magic = cpu_to_je16(JFFS2_MAGIC_BITMASK);
728 rd->nodetype = cpu_to_je16(JFFS2_NODETYPE_DIRENT);
729 rd->totlen = cpu_to_je32(sizeof(*rd) + namelen);
730 rd->hdr_crc = cpu_to_je32(crc32(0, rd, sizeof(struct jffs2_unknown_node)-4));
732 rd->pino = cpu_to_je32(dir_i->i_ino);
733 rd->version = cpu_to_je32(++dir_f->highest_version);
734 rd->ino = cpu_to_je32(inode->i_ino);
735 rd->mctime = cpu_to_je32(get_seconds());
738 /* XXX: This is ugly. */
739 rd->type = (mode & S_IFMT) >> 12;
741 rd->node_crc = cpu_to_je32(crc32(0, rd, sizeof(*rd)-8));
742 rd->name_crc = cpu_to_je32(crc32(0, dentry->d_name.name, namelen));
744 fd = jffs2_write_dirent(c, dir_f, rd, dentry->d_name.name, namelen, ALLOC_NORMAL);
747 /* dirent failed to write. Delete the inode normally
748 as if it were the final unlink() */
749 jffs2_complete_reservation(c);
750 jffs2_free_raw_dirent(rd);
751 mutex_unlock(&dir_f->sem);
756 dir_i->i_mtime = dir_i->i_ctime = ITIME(je32_to_cpu(rd->mctime));
758 jffs2_free_raw_dirent(rd);
760 /* Link the fd into the inode's list, obsoleting an old
762 jffs2_add_fd_to_list(c, fd, &dir_f->dents);
764 mutex_unlock(&dir_f->sem);
765 jffs2_complete_reservation(c);
767 d_instantiate(dentry, inode);
768 unlock_new_inode(inode);
776 static int jffs2_rename (struct inode *old_dir_i, struct dentry *old_dentry,
777 struct inode *new_dir_i, struct dentry *new_dentry)
780 struct jffs2_sb_info *c = JFFS2_SB_INFO(old_dir_i->i_sb);
781 struct jffs2_inode_info *victim_f = NULL;
785 if (new_dentry->d_inode && S_ISDIR(new_dentry->d_inode->i_mode))
786 dentry_unhash(new_dentry);
788 /* The VFS will check for us and prevent trying to rename a
789 * file over a directory and vice versa, but if it's a directory,
790 * the VFS can't check whether the victim is empty. The filesystem
791 * needs to do that for itself.
793 if (new_dentry->d_inode) {
794 victim_f = JFFS2_INODE_INFO(new_dentry->d_inode);
795 if (S_ISDIR(new_dentry->d_inode->i_mode)) {
796 struct jffs2_full_dirent *fd;
798 mutex_lock(&victim_f->sem);
799 for (fd = victim_f->dents; fd; fd = fd->next) {
801 mutex_unlock(&victim_f->sem);
805 mutex_unlock(&victim_f->sem);
809 /* XXX: We probably ought to alloc enough space for
810 both nodes at the same time. Writing the new link,
811 then getting -ENOSPC, is quite bad :)
814 /* Make a hard link */
816 /* XXX: This is ugly */
817 type = (old_dentry->d_inode->i_mode & S_IFMT) >> 12;
818 if (!type) type = DT_REG;
821 ret = jffs2_do_link(c, JFFS2_INODE_INFO(new_dir_i),
822 old_dentry->d_inode->i_ino, type,
823 new_dentry->d_name.name, new_dentry->d_name.len, now);
829 /* There was a victim. Kill it off nicely */
830 drop_nlink(new_dentry->d_inode);
831 /* Don't oops if the victim was a dirent pointing to an
832 inode which didn't exist. */
833 if (victim_f->inocache) {
834 mutex_lock(&victim_f->sem);
835 if (S_ISDIR(new_dentry->d_inode->i_mode))
836 victim_f->inocache->pino_nlink = 0;
838 victim_f->inocache->pino_nlink--;
839 mutex_unlock(&victim_f->sem);
843 /* If it was a directory we moved, and there was no victim,
844 increase i_nlink on its new parent */
845 if (S_ISDIR(old_dentry->d_inode->i_mode) && !victim_f)
846 inc_nlink(new_dir_i);
848 /* Unlink the original */
849 ret = jffs2_do_unlink(c, JFFS2_INODE_INFO(old_dir_i),
850 old_dentry->d_name.name, old_dentry->d_name.len, NULL, now);
852 /* We don't touch inode->i_nlink */
855 /* Oh shit. We really ought to make a single node which can do both atomically */
856 struct jffs2_inode_info *f = JFFS2_INODE_INFO(old_dentry->d_inode);
858 inc_nlink(old_dentry->d_inode);
859 if (f->inocache && !S_ISDIR(old_dentry->d_inode->i_mode))
860 f->inocache->pino_nlink++;
861 mutex_unlock(&f->sem);
863 printk(KERN_NOTICE "jffs2_rename(): Link succeeded, unlink failed (err %d). You now have a hard link\n", ret);
864 /* Might as well let the VFS know */
865 d_instantiate(new_dentry, old_dentry->d_inode);
866 ihold(old_dentry->d_inode);
867 new_dir_i->i_mtime = new_dir_i->i_ctime = ITIME(now);
871 if (S_ISDIR(old_dentry->d_inode->i_mode))
872 drop_nlink(old_dir_i);
874 new_dir_i->i_mtime = new_dir_i->i_ctime = old_dir_i->i_mtime = old_dir_i->i_ctime = ITIME(now);