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13#include <linux/kernel.h>
14#include <linux/slab.h>
15#include <linux/fs.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>
21#include "nodelist.h"
22
23static int jffs2_readdir (struct file *, void *, filldir_t);
24
25static int jffs2_create (struct inode *,struct dentry *,int,
26 struct nameidata *);
27static struct dentry *jffs2_lookup (struct inode *,struct dentry *,
28 struct nameidata *);
29static int jffs2_link (struct dentry *,struct inode *,struct dentry *);
30static int jffs2_unlink (struct inode *,struct dentry *);
31static int jffs2_symlink (struct inode *,struct dentry *,const char *);
32static int jffs2_mkdir (struct inode *,struct dentry *,int);
33static int jffs2_rmdir (struct inode *,struct dentry *);
34static int jffs2_mknod (struct inode *,struct dentry *,int,dev_t);
35static int jffs2_rename (struct inode *, struct dentry *,
36 struct inode *, struct dentry *);
37
38const struct file_operations jffs2_dir_operations =
39{
40 .read = generic_read_dir,
41 .readdir = jffs2_readdir,
42 .unlocked_ioctl=jffs2_ioctl,
43 .fsync = jffs2_fsync,
44 .llseek = generic_file_llseek,
45};
46
47
48const struct inode_operations jffs2_dir_inode_operations =
49{
50 .create = jffs2_create,
51 .lookup = jffs2_lookup,
52 .link = jffs2_link,
53 .unlink = jffs2_unlink,
54 .symlink = jffs2_symlink,
55 .mkdir = jffs2_mkdir,
56 .rmdir = jffs2_rmdir,
57 .mknod = jffs2_mknod,
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
65};
66
67
68
69
70
71
72
73
74static struct dentry *jffs2_lookup(struct inode *dir_i, struct dentry *target,
75 struct nameidata *nd)
76{
77 struct jffs2_inode_info *dir_f;
78 struct jffs2_full_dirent *fd = NULL, *fd_list;
79 uint32_t ino = 0;
80 struct inode *inode = NULL;
81
82 D1(printk(KERN_DEBUG "jffs2_lookup()\n"));
83
84 if (target->d_name.len > JFFS2_MAX_NAME_LEN)
85 return ERR_PTR(-ENAMETOOLONG);
86
87 dir_f = JFFS2_INODE_INFO(dir_i);
88
89 mutex_lock(&dir_f->sem);
90
91
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)) {
97 fd = fd_list;
98 }
99 }
100 if (fd)
101 ino = fd->ino;
102 mutex_unlock(&dir_f->sem);
103 if (ino) {
104 inode = jffs2_iget(dir_i->i_sb, ino);
105 if (IS_ERR(inode)) {
106 printk(KERN_WARNING "iget() failed for ino #%u\n", ino);
107 return ERR_CAST(inode);
108 }
109 }
110
111 return d_splice_alias(inode, target);
112}
113
114
115
116
117static int jffs2_readdir(struct file *filp, void *dirent, filldir_t filldir)
118{
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;
123
124 D1(printk(KERN_DEBUG "jffs2_readdir() for dir_i #%lu\n", filp->f_path.dentry->d_inode->i_ino));
125
126 f = JFFS2_INODE_INFO(inode);
127
128 offset = filp->f_pos;
129
130 if (offset == 0) {
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)
133 goto out;
134 offset++;
135 }
136 if (offset == 1) {
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)
140 goto out;
141 offset++;
142 }
143
144 curofs=1;
145 mutex_lock(&f->sem);
146 for (fd = f->dents; fd; fd = fd->next) {
147
148 curofs++;
149
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));
153 continue;
154 }
155 if (!fd->ino) {
156 D2(printk(KERN_DEBUG "Skipping deletion dirent \"%s\"\n", fd->name));
157 offset++;
158 continue;
159 }
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)
162 break;
163 offset++;
164 }
165 mutex_unlock(&f->sem);
166 out:
167 filp->f_pos = offset;
168 return 0;
169}
170
171
172
173
174static int jffs2_create(struct inode *dir_i, struct dentry *dentry, int mode,
175 struct nameidata *nd)
176{
177 struct jffs2_raw_inode *ri;
178 struct jffs2_inode_info *f, *dir_f;
179 struct jffs2_sb_info *c;
180 struct inode *inode;
181 int ret;
182
183 ri = jffs2_alloc_raw_inode();
184 if (!ri)
185 return -ENOMEM;
186
187 c = JFFS2_SB_INFO(dir_i->i_sb);
188
189 D1(printk(KERN_DEBUG "jffs2_create()\n"));
190
191 inode = jffs2_new_inode(dir_i, mode, ri);
192
193 if (IS_ERR(inode)) {
194 D1(printk(KERN_DEBUG "jffs2_new_inode() failed\n"));
195 jffs2_free_raw_inode(ri);
196 return PTR_ERR(inode);
197 }
198
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;
203
204 f = JFFS2_INODE_INFO(inode);
205 dir_f = JFFS2_INODE_INFO(dir_i);
206
207
208
209
210
211
212 mutex_unlock(&f->sem);
213
214 ret = jffs2_do_create(c, dir_f, f, ri, &dentry->d_name);
215 if (ret)
216 goto fail;
217
218 dir_i->i_mtime = dir_i->i_ctime = ITIME(je32_to_cpu(ri->ctime));
219
220 jffs2_free_raw_inode(ri);
221
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));
225
226 d_instantiate(dentry, inode);
227 unlock_new_inode(inode);
228 return 0;
229
230 fail:
231 iget_failed(inode);
232 jffs2_free_raw_inode(ri);
233 return ret;
234}
235
236
237
238
239static int jffs2_unlink(struct inode *dir_i, struct dentry *dentry)
240{
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);
244 int ret;
245 uint32_t now = get_seconds();
246
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;
251 if (!ret)
252 dir_i->i_mtime = dir_i->i_ctime = ITIME(now);
253 return ret;
254}
255
256
257
258static int jffs2_link (struct dentry *old_dentry, struct inode *dir_i, struct dentry *dentry)
259{
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);
263 int ret;
264 uint8_t type;
265 uint32_t now;
266
267
268 if (!f->inocache)
269 return -EIO;
270
271 if (S_ISDIR(old_dentry->d_inode->i_mode))
272 return -EPERM;
273
274
275 type = (old_dentry->d_inode->i_mode & S_IFMT) >> 12;
276 if (!type) type = DT_REG;
277
278 now = get_seconds();
279 ret = jffs2_do_link(c, dir_f, f->inocache->ino, type, dentry->d_name.name, dentry->d_name.len, now);
280
281 if (!ret) {
282 mutex_lock(&f->sem);
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);
288 }
289 return ret;
290}
291
292
293
294static int jffs2_symlink (struct inode *dir_i, struct dentry *dentry, const char *target)
295{
296 struct jffs2_inode_info *f, *dir_f;
297 struct jffs2_sb_info *c;
298 struct inode *inode;
299 struct jffs2_raw_inode *ri;
300 struct jffs2_raw_dirent *rd;
301 struct jffs2_full_dnode *fn;
302 struct jffs2_full_dirent *fd;
303 int namelen;
304 uint32_t alloclen;
305 int ret, targetlen = strlen(target);
306
307
308
309 if (targetlen > 254)
310 return -ENAMETOOLONG;
311
312 ri = jffs2_alloc_raw_inode();
313
314 if (!ri)
315 return -ENOMEM;
316
317 c = JFFS2_SB_INFO(dir_i->i_sb);
318
319
320
321
322 namelen = dentry->d_name.len;
323 ret = jffs2_reserve_space(c, sizeof(*ri) + targetlen, &alloclen,
324 ALLOC_NORMAL, JFFS2_SUMMARY_INODE_SIZE);
325
326 if (ret) {
327 jffs2_free_raw_inode(ri);
328 return ret;
329 }
330
331 inode = jffs2_new_inode(dir_i, S_IFLNK | S_IRWXUGO, ri);
332
333 if (IS_ERR(inode)) {
334 jffs2_free_raw_inode(ri);
335 jffs2_complete_reservation(c);
336 return PTR_ERR(inode);
337 }
338
339 inode->i_op = &jffs2_symlink_inode_operations;
340
341 f = JFFS2_INODE_INFO(inode);
342
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));
347
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));
351
352 fn = jffs2_write_dnode(c, f, ri, target, targetlen, ALLOC_NORMAL);
353
354 jffs2_free_raw_inode(ri);
355
356 if (IS_ERR(fn)) {
357
358 mutex_unlock(&f->sem);
359 jffs2_complete_reservation(c);
360 ret = PTR_ERR(fn);
361 goto fail;
362 }
363
364
365 f->target = kmemdup(target, targetlen + 1, GFP_KERNEL);
366 if (!f->target) {
367 printk(KERN_WARNING "Can't allocate %d bytes of memory\n", targetlen + 1);
368 mutex_unlock(&f->sem);
369 jffs2_complete_reservation(c);
370 ret = -ENOMEM;
371 goto fail;
372 }
373
374 D1(printk(KERN_DEBUG "jffs2_symlink: symlink's target '%s' cached\n", (char *)f->target));
375
376
377
378
379 f->metadata = fn;
380 mutex_unlock(&f->sem);
381
382 jffs2_complete_reservation(c);
383
384 ret = jffs2_init_security(inode, dir_i, &dentry->d_name);
385 if (ret)
386 goto fail;
387
388 ret = jffs2_init_acl_post(inode);
389 if (ret)
390 goto fail;
391
392 ret = jffs2_reserve_space(c, sizeof(*rd)+namelen, &alloclen,
393 ALLOC_NORMAL, JFFS2_SUMMARY_DIRENT_SIZE(namelen));
394 if (ret)
395 goto fail;
396
397 rd = jffs2_alloc_raw_dirent();
398 if (!rd) {
399
400 jffs2_complete_reservation(c);
401 ret = -ENOMEM;
402 goto fail;
403 }
404
405 dir_f = JFFS2_INODE_INFO(dir_i);
406 mutex_lock(&dir_f->sem);
407
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));
412
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());
417 rd->nsize = namelen;
418 rd->type = DT_LNK;
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));
421
422 fd = jffs2_write_dirent(c, dir_f, rd, dentry->d_name.name, namelen, ALLOC_NORMAL);
423
424 if (IS_ERR(fd)) {
425
426
427 jffs2_complete_reservation(c);
428 jffs2_free_raw_dirent(rd);
429 mutex_unlock(&dir_f->sem);
430 ret = PTR_ERR(fd);
431 goto fail;
432 }
433
434 dir_i->i_mtime = dir_i->i_ctime = ITIME(je32_to_cpu(rd->mctime));
435
436 jffs2_free_raw_dirent(rd);
437
438
439
440 jffs2_add_fd_to_list(c, fd, &dir_f->dents);
441
442 mutex_unlock(&dir_f->sem);
443 jffs2_complete_reservation(c);
444
445 d_instantiate(dentry, inode);
446 unlock_new_inode(inode);
447 return 0;
448
449 fail:
450 iget_failed(inode);
451 return ret;
452}
453
454
455static int jffs2_mkdir (struct inode *dir_i, struct dentry *dentry, int mode)
456{
457 struct jffs2_inode_info *f, *dir_f;
458 struct jffs2_sb_info *c;
459 struct inode *inode;
460 struct jffs2_raw_inode *ri;
461 struct jffs2_raw_dirent *rd;
462 struct jffs2_full_dnode *fn;
463 struct jffs2_full_dirent *fd;
464 int namelen;
465 uint32_t alloclen;
466 int ret;
467
468 mode |= S_IFDIR;
469
470 ri = jffs2_alloc_raw_inode();
471 if (!ri)
472 return -ENOMEM;
473
474 c = JFFS2_SB_INFO(dir_i->i_sb);
475
476
477
478
479 namelen = dentry->d_name.len;
480 ret = jffs2_reserve_space(c, sizeof(*ri), &alloclen, ALLOC_NORMAL,
481 JFFS2_SUMMARY_INODE_SIZE);
482
483 if (ret) {
484 jffs2_free_raw_inode(ri);
485 return ret;
486 }
487
488 inode = jffs2_new_inode(dir_i, mode, ri);
489
490 if (IS_ERR(inode)) {
491 jffs2_free_raw_inode(ri);
492 jffs2_complete_reservation(c);
493 return PTR_ERR(inode);
494 }
495
496 inode->i_op = &jffs2_dir_inode_operations;
497 inode->i_fop = &jffs2_dir_operations;
498
499 f = JFFS2_INODE_INFO(inode);
500
501
502 inode->i_nlink = 2;
503
504 f->inocache->pino_nlink = dir_i->i_ino;
505
506 ri->data_crc = cpu_to_je32(0);
507 ri->node_crc = cpu_to_je32(crc32(0, ri, sizeof(*ri)-8));
508
509 fn = jffs2_write_dnode(c, f, ri, NULL, 0, ALLOC_NORMAL);
510
511 jffs2_free_raw_inode(ri);
512
513 if (IS_ERR(fn)) {
514
515 mutex_unlock(&f->sem);
516 jffs2_complete_reservation(c);
517 ret = PTR_ERR(fn);
518 goto fail;
519 }
520
521
522
523 f->metadata = fn;
524 mutex_unlock(&f->sem);
525
526 jffs2_complete_reservation(c);
527
528 ret = jffs2_init_security(inode, dir_i, &dentry->d_name);
529 if (ret)
530 goto fail;
531
532 ret = jffs2_init_acl_post(inode);
533 if (ret)
534 goto fail;
535
536 ret = jffs2_reserve_space(c, sizeof(*rd)+namelen, &alloclen,
537 ALLOC_NORMAL, JFFS2_SUMMARY_DIRENT_SIZE(namelen));
538 if (ret)
539 goto fail;
540
541 rd = jffs2_alloc_raw_dirent();
542 if (!rd) {
543
544 jffs2_complete_reservation(c);
545 ret = -ENOMEM;
546 goto fail;
547 }
548
549 dir_f = JFFS2_INODE_INFO(dir_i);
550 mutex_lock(&dir_f->sem);
551
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));
556
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());
561 rd->nsize = namelen;
562 rd->type = DT_DIR;
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));
565
566 fd = jffs2_write_dirent(c, dir_f, rd, dentry->d_name.name, namelen, ALLOC_NORMAL);
567
568 if (IS_ERR(fd)) {
569
570
571 jffs2_complete_reservation(c);
572 jffs2_free_raw_dirent(rd);
573 mutex_unlock(&dir_f->sem);
574 ret = PTR_ERR(fd);
575 goto fail;
576 }
577
578 dir_i->i_mtime = dir_i->i_ctime = ITIME(je32_to_cpu(rd->mctime));
579 inc_nlink(dir_i);
580
581 jffs2_free_raw_dirent(rd);
582
583
584
585 jffs2_add_fd_to_list(c, fd, &dir_f->dents);
586
587 mutex_unlock(&dir_f->sem);
588 jffs2_complete_reservation(c);
589
590 d_instantiate(dentry, inode);
591 unlock_new_inode(inode);
592 return 0;
593
594 fail:
595 iget_failed(inode);
596 return ret;
597}
598
599static int jffs2_rmdir (struct inode *dir_i, struct dentry *dentry)
600{
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;
605 int ret;
606 uint32_t now = get_seconds();
607
608 for (fd = f->dents ; fd; fd = fd->next) {
609 if (fd->ino)
610 return -ENOTEMPTY;
611 }
612
613 ret = jffs2_do_unlink(c, dir_f, dentry->d_name.name,
614 dentry->d_name.len, f, now);
615 if (!ret) {
616 dir_i->i_mtime = dir_i->i_ctime = ITIME(now);
617 clear_nlink(dentry->d_inode);
618 drop_nlink(dir_i);
619 }
620 return ret;
621}
622
623static int jffs2_mknod (struct inode *dir_i, struct dentry *dentry, int mode, dev_t rdev)
624{
625 struct jffs2_inode_info *f, *dir_f;
626 struct jffs2_sb_info *c;
627 struct inode *inode;
628 struct jffs2_raw_inode *ri;
629 struct jffs2_raw_dirent *rd;
630 struct jffs2_full_dnode *fn;
631 struct jffs2_full_dirent *fd;
632 int namelen;
633 union jffs2_device_node dev;
634 int devlen = 0;
635 uint32_t alloclen;
636 int ret;
637
638 if (!new_valid_dev(rdev))
639 return -EINVAL;
640
641 ri = jffs2_alloc_raw_inode();
642 if (!ri)
643 return -ENOMEM;
644
645 c = JFFS2_SB_INFO(dir_i->i_sb);
646
647 if (S_ISBLK(mode) || S_ISCHR(mode))
648 devlen = jffs2_encode_dev(&dev, rdev);
649
650
651
652
653 namelen = dentry->d_name.len;
654 ret = jffs2_reserve_space(c, sizeof(*ri) + devlen, &alloclen,
655 ALLOC_NORMAL, JFFS2_SUMMARY_INODE_SIZE);
656
657 if (ret) {
658 jffs2_free_raw_inode(ri);
659 return ret;
660 }
661
662 inode = jffs2_new_inode(dir_i, mode, ri);
663
664 if (IS_ERR(inode)) {
665 jffs2_free_raw_inode(ri);
666 jffs2_complete_reservation(c);
667 return PTR_ERR(inode);
668 }
669 inode->i_op = &jffs2_file_inode_operations;
670 init_special_inode(inode, inode->i_mode, rdev);
671
672 f = JFFS2_INODE_INFO(inode);
673
674 ri->dsize = ri->csize = cpu_to_je32(devlen);
675 ri->totlen = cpu_to_je32(sizeof(*ri) + devlen);
676 ri->hdr_crc = cpu_to_je32(crc32(0, ri, sizeof(struct jffs2_unknown_node)-4));
677
678 ri->compr = JFFS2_COMPR_NONE;
679 ri->data_crc = cpu_to_je32(crc32(0, &dev, devlen));
680 ri->node_crc = cpu_to_je32(crc32(0, ri, sizeof(*ri)-8));
681
682 fn = jffs2_write_dnode(c, f, ri, (char *)&dev, devlen, ALLOC_NORMAL);
683
684 jffs2_free_raw_inode(ri);
685
686 if (IS_ERR(fn)) {
687
688 mutex_unlock(&f->sem);
689 jffs2_complete_reservation(c);
690 ret = PTR_ERR(fn);
691 goto fail;
692 }
693
694
695
696 f->metadata = fn;
697 mutex_unlock(&f->sem);
698
699 jffs2_complete_reservation(c);
700
701 ret = jffs2_init_security(inode, dir_i, &dentry->d_name);
702 if (ret)
703 goto fail;
704
705 ret = jffs2_init_acl_post(inode);
706 if (ret)
707 goto fail;
708
709 ret = jffs2_reserve_space(c, sizeof(*rd)+namelen, &alloclen,
710 ALLOC_NORMAL, JFFS2_SUMMARY_DIRENT_SIZE(namelen));
711 if (ret)
712 goto fail;
713
714 rd = jffs2_alloc_raw_dirent();
715 if (!rd) {
716
717 jffs2_complete_reservation(c);
718 ret = -ENOMEM;
719 goto fail;
720 }
721
722 dir_f = JFFS2_INODE_INFO(dir_i);
723 mutex_lock(&dir_f->sem);
724
725 rd->magic = cpu_to_je16(JFFS2_MAGIC_BITMASK);
726 rd->nodetype = cpu_to_je16(JFFS2_NODETYPE_DIRENT);
727 rd->totlen = cpu_to_je32(sizeof(*rd) + namelen);
728 rd->hdr_crc = cpu_to_je32(crc32(0, rd, sizeof(struct jffs2_unknown_node)-4));
729
730 rd->pino = cpu_to_je32(dir_i->i_ino);
731 rd->version = cpu_to_je32(++dir_f->highest_version);
732 rd->ino = cpu_to_je32(inode->i_ino);
733 rd->mctime = cpu_to_je32(get_seconds());
734 rd->nsize = namelen;
735
736
737 rd->type = (mode & S_IFMT) >> 12;
738
739 rd->node_crc = cpu_to_je32(crc32(0, rd, sizeof(*rd)-8));
740 rd->name_crc = cpu_to_je32(crc32(0, dentry->d_name.name, namelen));
741
742 fd = jffs2_write_dirent(c, dir_f, rd, dentry->d_name.name, namelen, ALLOC_NORMAL);
743
744 if (IS_ERR(fd)) {
745
746
747 jffs2_complete_reservation(c);
748 jffs2_free_raw_dirent(rd);
749 mutex_unlock(&dir_f->sem);
750 ret = PTR_ERR(fd);
751 goto fail;
752 }
753
754 dir_i->i_mtime = dir_i->i_ctime = ITIME(je32_to_cpu(rd->mctime));
755
756 jffs2_free_raw_dirent(rd);
757
758
759
760 jffs2_add_fd_to_list(c, fd, &dir_f->dents);
761
762 mutex_unlock(&dir_f->sem);
763 jffs2_complete_reservation(c);
764
765 d_instantiate(dentry, inode);
766 unlock_new_inode(inode);
767 return 0;
768
769 fail:
770 iget_failed(inode);
771 return ret;
772}
773
774static int jffs2_rename (struct inode *old_dir_i, struct dentry *old_dentry,
775 struct inode *new_dir_i, struct dentry *new_dentry)
776{
777 int ret;
778 struct jffs2_sb_info *c = JFFS2_SB_INFO(old_dir_i->i_sb);
779 struct jffs2_inode_info *victim_f = NULL;
780 uint8_t type;
781 uint32_t now;
782
783
784
785
786
787
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;
792
793 mutex_lock(&victim_f->sem);
794 for (fd = victim_f->dents; fd; fd = fd->next) {
795 if (fd->ino) {
796 mutex_unlock(&victim_f->sem);
797 return -ENOTEMPTY;
798 }
799 }
800 mutex_unlock(&victim_f->sem);
801 }
802 }
803
804
805
806
807
808
809
810
811
812 type = (old_dentry->d_inode->i_mode & S_IFMT) >> 12;
813 if (!type) type = DT_REG;
814
815 now = get_seconds();
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);
819
820 if (ret)
821 return ret;
822
823 if (victim_f) {
824
825 drop_nlink(new_dentry->d_inode);
826
827
828 if (victim_f->inocache) {
829 mutex_lock(&victim_f->sem);
830 if (S_ISDIR(new_dentry->d_inode->i_mode))
831 victim_f->inocache->pino_nlink = 0;
832 else
833 victim_f->inocache->pino_nlink--;
834 mutex_unlock(&victim_f->sem);
835 }
836 }
837
838
839
840 if (S_ISDIR(old_dentry->d_inode->i_mode) && !victim_f)
841 inc_nlink(new_dir_i);
842
843
844 ret = jffs2_do_unlink(c, JFFS2_INODE_INFO(old_dir_i),
845 old_dentry->d_name.name, old_dentry->d_name.len, NULL, now);
846
847
848
849 if (ret) {
850
851 struct jffs2_inode_info *f = JFFS2_INODE_INFO(old_dentry->d_inode);
852 mutex_lock(&f->sem);
853 inc_nlink(old_dentry->d_inode);
854 if (f->inocache && !S_ISDIR(old_dentry->d_inode->i_mode))
855 f->inocache->pino_nlink++;
856 mutex_unlock(&f->sem);
857
858 printk(KERN_NOTICE "jffs2_rename(): Link succeeded, unlink failed (err %d). You now have a hard link\n", ret);
859
860 d_instantiate(new_dentry, old_dentry->d_inode);
861 ihold(old_dentry->d_inode);
862 new_dir_i->i_mtime = new_dir_i->i_ctime = ITIME(now);
863 return ret;
864 }
865
866 if (S_ISDIR(old_dentry->d_inode->i_mode))
867 drop_nlink(old_dir_i);
868
869 new_dir_i->i_mtime = new_dir_i->i_ctime = old_dir_i->i_mtime = old_dir_i->i_ctime = ITIME(now);
870
871 return 0;
872}
873
874
