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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_sb_info *c;
79 struct jffs2_full_dirent *fd = NULL, *fd_list;
80 uint32_t ino = 0;
81 struct inode *inode = NULL;
82
83 D1(printk(KERN_DEBUG "jffs2_lookup()\n"));
84
85 if (target->d_name.len > JFFS2_MAX_NAME_LEN)
86 return ERR_PTR(-ENAMETOOLONG);
87
88 dir_f = JFFS2_INODE_INFO(dir_i);
89 c = JFFS2_SB_INFO(dir_i->i_sb);
90
91 mutex_lock(&dir_f->sem);
92
93
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)) {
99 fd = fd_list;
100 }
101 }
102 if (fd)
103 ino = fd->ino;
104 mutex_unlock(&dir_f->sem);
105 if (ino) {
106 inode = jffs2_iget(dir_i->i_sb, ino);
107 if (IS_ERR(inode)) {
108 printk(KERN_WARNING "iget() failed for ino #%u\n", ino);
109 return ERR_CAST(inode);
110 }
111 }
112
113 return d_splice_alias(inode, target);
114}
115
116
117
118
119static int jffs2_readdir(struct file *filp, void *dirent, filldir_t filldir)
120{
121 struct jffs2_inode_info *f;
122 struct jffs2_sb_info *c;
123 struct inode *inode = filp->f_path.dentry->d_inode;
124 struct jffs2_full_dirent *fd;
125 unsigned long offset, curofs;
126
127 D1(printk(KERN_DEBUG "jffs2_readdir() for dir_i #%lu\n", filp->f_path.dentry->d_inode->i_ino));
128
129 f = JFFS2_INODE_INFO(inode);
130 c = JFFS2_SB_INFO(inode->i_sb);
131
132 offset = filp->f_pos;
133
134 if (offset == 0) {
135 D1(printk(KERN_DEBUG "Dirent 0: \".\", ino #%lu\n", inode->i_ino));
136 if (filldir(dirent, ".", 1, 0, inode->i_ino, DT_DIR) < 0)
137 goto out;
138 offset++;
139 }
140 if (offset == 1) {
141 unsigned long pino = parent_ino(filp->f_path.dentry);
142 D1(printk(KERN_DEBUG "Dirent 1: \"..\", ino #%lu\n", pino));
143 if (filldir(dirent, "..", 2, 1, pino, DT_DIR) < 0)
144 goto out;
145 offset++;
146 }
147
148 curofs=1;
149 mutex_lock(&f->sem);
150 for (fd = f->dents; fd; fd = fd->next) {
151
152 curofs++;
153
154 if (curofs < offset) {
155 D2(printk(KERN_DEBUG "Skipping dirent: \"%s\", ino #%u, type %d, because curofs %ld < offset %ld\n",
156 fd->name, fd->ino, fd->type, curofs, offset));
157 continue;
158 }
159 if (!fd->ino) {
160 D2(printk(KERN_DEBUG "Skipping deletion dirent \"%s\"\n", fd->name));
161 offset++;
162 continue;
163 }
164 D2(printk(KERN_DEBUG "Dirent %ld: \"%s\", ino #%u, type %d\n", offset, fd->name, fd->ino, fd->type));
165 if (filldir(dirent, fd->name, strlen(fd->name), offset, fd->ino, fd->type) < 0)
166 break;
167 offset++;
168 }
169 mutex_unlock(&f->sem);
170 out:
171 filp->f_pos = offset;
172 return 0;
173}
174
175
176
177
178static int jffs2_create(struct inode *dir_i, struct dentry *dentry, int mode,
179 struct nameidata *nd)
180{
181 struct jffs2_raw_inode *ri;
182 struct jffs2_inode_info *f, *dir_f;
183 struct jffs2_sb_info *c;
184 struct inode *inode;
185 int ret;
186
187 ri = jffs2_alloc_raw_inode();
188 if (!ri)
189 return -ENOMEM;
190
191 c = JFFS2_SB_INFO(dir_i->i_sb);
192
193 D1(printk(KERN_DEBUG "jffs2_create()\n"));
194
195 inode = jffs2_new_inode(dir_i, mode, ri);
196
197 if (IS_ERR(inode)) {
198 D1(printk(KERN_DEBUG "jffs2_new_inode() failed\n"));
199 jffs2_free_raw_inode(ri);
200 return PTR_ERR(inode);
201 }
202
203 inode->i_op = &jffs2_file_inode_operations;
204 inode->i_fop = &jffs2_file_operations;
205 inode->i_mapping->a_ops = &jffs2_file_address_operations;
206 inode->i_mapping->nrpages = 0;
207
208 f = JFFS2_INODE_INFO(inode);
209 dir_f = JFFS2_INODE_INFO(dir_i);
210
211
212
213
214
215
216 mutex_unlock(&f->sem);
217
218 ret = jffs2_do_create(c, dir_f, f, ri,
219 dentry->d_name.name, dentry->d_name.len);
220 if (ret)
221 goto fail;
222
223 dir_i->i_mtime = dir_i->i_ctime = ITIME(je32_to_cpu(ri->ctime));
224
225 jffs2_free_raw_inode(ri);
226
227 D1(printk(KERN_DEBUG "jffs2_create: Created ino #%lu with mode %o, nlink %d(%d). nrpages %ld\n",
228 inode->i_ino, inode->i_mode, inode->i_nlink,
229 f->inocache->pino_nlink, inode->i_mapping->nrpages));
230
231 d_instantiate(dentry, inode);
232 unlock_new_inode(inode);
233 return 0;
234
235 fail:
236 iget_failed(inode);
237 jffs2_free_raw_inode(ri);
238 return ret;
239}
240
241
242
243
244static int jffs2_unlink(struct inode *dir_i, struct dentry *dentry)
245{
246 struct jffs2_sb_info *c = JFFS2_SB_INFO(dir_i->i_sb);
247 struct jffs2_inode_info *dir_f = JFFS2_INODE_INFO(dir_i);
248 struct jffs2_inode_info *dead_f = JFFS2_INODE_INFO(dentry->d_inode);
249 int ret;
250 uint32_t now = get_seconds();
251
252 ret = jffs2_do_unlink(c, dir_f, dentry->d_name.name,
253 dentry->d_name.len, dead_f, now);
254 if (dead_f->inocache)
255 dentry->d_inode->i_nlink = dead_f->inocache->pino_nlink;
256 if (!ret)
257 dir_i->i_mtime = dir_i->i_ctime = ITIME(now);
258 return ret;
259}
260
261
262
263static int jffs2_link (struct dentry *old_dentry, struct inode *dir_i, struct dentry *dentry)
264{
265 struct jffs2_sb_info *c = JFFS2_SB_INFO(old_dentry->d_inode->i_sb);
266 struct jffs2_inode_info *f = JFFS2_INODE_INFO(old_dentry->d_inode);
267 struct jffs2_inode_info *dir_f = JFFS2_INODE_INFO(dir_i);
268 int ret;
269 uint8_t type;
270 uint32_t now;
271
272
273 if (!f->inocache)
274 return -EIO;
275
276 if (S_ISDIR(old_dentry->d_inode->i_mode))
277 return -EPERM;
278
279
280 type = (old_dentry->d_inode->i_mode & S_IFMT) >> 12;
281 if (!type) type = DT_REG;
282
283 now = get_seconds();
284 ret = jffs2_do_link(c, dir_f, f->inocache->ino, type, dentry->d_name.name, dentry->d_name.len, now);
285
286 if (!ret) {
287 mutex_lock(&f->sem);
288 old_dentry->d_inode->i_nlink = ++f->inocache->pino_nlink;
289 mutex_unlock(&f->sem);
290 d_instantiate(dentry, old_dentry->d_inode);
291 dir_i->i_mtime = dir_i->i_ctime = ITIME(now);
292 ihold(old_dentry->d_inode);
293 }
294 return ret;
295}
296
297
298
299static int jffs2_symlink (struct inode *dir_i, struct dentry *dentry, const char *target)
300{
301 struct jffs2_inode_info *f, *dir_f;
302 struct jffs2_sb_info *c;
303 struct inode *inode;
304 struct jffs2_raw_inode *ri;
305 struct jffs2_raw_dirent *rd;
306 struct jffs2_full_dnode *fn;
307 struct jffs2_full_dirent *fd;
308 int namelen;
309 uint32_t alloclen;
310 int ret, targetlen = strlen(target);
311
312
313
314 if (targetlen > 254)
315 return -ENAMETOOLONG;
316
317 ri = jffs2_alloc_raw_inode();
318
319 if (!ri)
320 return -ENOMEM;
321
322 c = JFFS2_SB_INFO(dir_i->i_sb);
323
324
325
326
327 namelen = dentry->d_name.len;
328 ret = jffs2_reserve_space(c, sizeof(*ri) + targetlen, &alloclen,
329 ALLOC_NORMAL, JFFS2_SUMMARY_INODE_SIZE);
330
331 if (ret) {
332 jffs2_free_raw_inode(ri);
333 return ret;
334 }
335
336 inode = jffs2_new_inode(dir_i, S_IFLNK | S_IRWXUGO, ri);
337
338 if (IS_ERR(inode)) {
339 jffs2_free_raw_inode(ri);
340 jffs2_complete_reservation(c);
341 return PTR_ERR(inode);
342 }
343
344 inode->i_op = &jffs2_symlink_inode_operations;
345
346 f = JFFS2_INODE_INFO(inode);
347
348 inode->i_size = targetlen;
349 ri->isize = ri->dsize = ri->csize = cpu_to_je32(inode->i_size);
350 ri->totlen = cpu_to_je32(sizeof(*ri) + inode->i_size);
351 ri->hdr_crc = cpu_to_je32(crc32(0, ri, sizeof(struct jffs2_unknown_node)-4));
352
353 ri->compr = JFFS2_COMPR_NONE;
354 ri->data_crc = cpu_to_je32(crc32(0, target, targetlen));
355 ri->node_crc = cpu_to_je32(crc32(0, ri, sizeof(*ri)-8));
356
357 fn = jffs2_write_dnode(c, f, ri, target, targetlen, ALLOC_NORMAL);
358
359 jffs2_free_raw_inode(ri);
360
361 if (IS_ERR(fn)) {
362
363 mutex_unlock(&f->sem);
364 jffs2_complete_reservation(c);
365 ret = PTR_ERR(fn);
366 goto fail;
367 }
368
369
370 f->target = kmemdup(target, targetlen + 1, GFP_KERNEL);
371 if (!f->target) {
372 printk(KERN_WARNING "Can't allocate %d bytes of memory\n", targetlen + 1);
373 mutex_unlock(&f->sem);
374 jffs2_complete_reservation(c);
375 ret = -ENOMEM;
376 goto fail;
377 }
378
379 D1(printk(KERN_DEBUG "jffs2_symlink: symlink's target '%s' cached\n", (char *)f->target));
380
381
382
383
384 f->metadata = fn;
385 mutex_unlock(&f->sem);
386
387 jffs2_complete_reservation(c);
388
389 ret = jffs2_init_security(inode, dir_i);
390 if (ret)
391 goto fail;
392
393 ret = jffs2_init_acl_post(inode);
394 if (ret)
395 goto fail;
396
397 ret = jffs2_reserve_space(c, sizeof(*rd)+namelen, &alloclen,
398 ALLOC_NORMAL, JFFS2_SUMMARY_DIRENT_SIZE(namelen));
399 if (ret)
400 goto fail;
401
402 rd = jffs2_alloc_raw_dirent();
403 if (!rd) {
404
405 jffs2_complete_reservation(c);
406 ret = -ENOMEM;
407 goto fail;
408 }
409
410 dir_f = JFFS2_INODE_INFO(dir_i);
411 mutex_lock(&dir_f->sem);
412
413 rd->magic = cpu_to_je16(JFFS2_MAGIC_BITMASK);
414 rd->nodetype = cpu_to_je16(JFFS2_NODETYPE_DIRENT);
415 rd->totlen = cpu_to_je32(sizeof(*rd) + namelen);
416 rd->hdr_crc = cpu_to_je32(crc32(0, rd, sizeof(struct jffs2_unknown_node)-4));
417
418 rd->pino = cpu_to_je32(dir_i->i_ino);
419 rd->version = cpu_to_je32(++dir_f->highest_version);
420 rd->ino = cpu_to_je32(inode->i_ino);
421 rd->mctime = cpu_to_je32(get_seconds());
422 rd->nsize = namelen;
423 rd->type = DT_LNK;
424 rd->node_crc = cpu_to_je32(crc32(0, rd, sizeof(*rd)-8));
425 rd->name_crc = cpu_to_je32(crc32(0, dentry->d_name.name, namelen));
426
427 fd = jffs2_write_dirent(c, dir_f, rd, dentry->d_name.name, namelen, ALLOC_NORMAL);
428
429 if (IS_ERR(fd)) {
430
431
432 jffs2_complete_reservation(c);
433 jffs2_free_raw_dirent(rd);
434 mutex_unlock(&dir_f->sem);
435 ret = PTR_ERR(fd);
436 goto fail;
437 }
438
439 dir_i->i_mtime = dir_i->i_ctime = ITIME(je32_to_cpu(rd->mctime));
440
441 jffs2_free_raw_dirent(rd);
442
443
444
445 jffs2_add_fd_to_list(c, fd, &dir_f->dents);
446
447 mutex_unlock(&dir_f->sem);
448 jffs2_complete_reservation(c);
449
450 d_instantiate(dentry, inode);
451 unlock_new_inode(inode);
452 return 0;
453
454 fail:
455 iget_failed(inode);
456 return ret;
457}
458
459
460static int jffs2_mkdir (struct inode *dir_i, struct dentry *dentry, int mode)
461{
462 struct jffs2_inode_info *f, *dir_f;
463 struct jffs2_sb_info *c;
464 struct inode *inode;
465 struct jffs2_raw_inode *ri;
466 struct jffs2_raw_dirent *rd;
467 struct jffs2_full_dnode *fn;
468 struct jffs2_full_dirent *fd;
469 int namelen;
470 uint32_t alloclen;
471 int ret;
472
473 mode |= S_IFDIR;
474
475 ri = jffs2_alloc_raw_inode();
476 if (!ri)
477 return -ENOMEM;
478
479 c = JFFS2_SB_INFO(dir_i->i_sb);
480
481
482
483
484 namelen = dentry->d_name.len;
485 ret = jffs2_reserve_space(c, sizeof(*ri), &alloclen, ALLOC_NORMAL,
486 JFFS2_SUMMARY_INODE_SIZE);
487
488 if (ret) {
489 jffs2_free_raw_inode(ri);
490 return ret;
491 }
492
493 inode = jffs2_new_inode(dir_i, mode, ri);
494
495 if (IS_ERR(inode)) {
496 jffs2_free_raw_inode(ri);
497 jffs2_complete_reservation(c);
498 return PTR_ERR(inode);
499 }
500
501 inode->i_op = &jffs2_dir_inode_operations;
502 inode->i_fop = &jffs2_dir_operations;
503
504 f = JFFS2_INODE_INFO(inode);
505
506
507 inode->i_nlink = 2;
508
509 f->inocache->pino_nlink = dir_i->i_ino;
510
511 ri->data_crc = cpu_to_je32(0);
512 ri->node_crc = cpu_to_je32(crc32(0, ri, sizeof(*ri)-8));
513
514 fn = jffs2_write_dnode(c, f, ri, NULL, 0, ALLOC_NORMAL);
515
516 jffs2_free_raw_inode(ri);
517
518 if (IS_ERR(fn)) {
519
520 mutex_unlock(&f->sem);
521 jffs2_complete_reservation(c);
522 ret = PTR_ERR(fn);
523 goto fail;
524 }
525
526
527
528 f->metadata = fn;
529 mutex_unlock(&f->sem);
530
531 jffs2_complete_reservation(c);
532
533 ret = jffs2_init_security(inode, dir_i);
534 if (ret)
535 goto fail;
536
537 ret = jffs2_init_acl_post(inode);
538 if (ret)
539 goto fail;
540
541 ret = jffs2_reserve_space(c, sizeof(*rd)+namelen, &alloclen,
542 ALLOC_NORMAL, JFFS2_SUMMARY_DIRENT_SIZE(namelen));
543 if (ret)
544 goto fail;
545
546 rd = jffs2_alloc_raw_dirent();
547 if (!rd) {
548
549 jffs2_complete_reservation(c);
550 ret = -ENOMEM;
551 goto fail;
552 }
553
554 dir_f = JFFS2_INODE_INFO(dir_i);
555 mutex_lock(&dir_f->sem);
556
557 rd->magic = cpu_to_je16(JFFS2_MAGIC_BITMASK);
558 rd->nodetype = cpu_to_je16(JFFS2_NODETYPE_DIRENT);
559 rd->totlen = cpu_to_je32(sizeof(*rd) + namelen);
560 rd->hdr_crc = cpu_to_je32(crc32(0, rd, sizeof(struct jffs2_unknown_node)-4));
561
562 rd->pino = cpu_to_je32(dir_i->i_ino);
563 rd->version = cpu_to_je32(++dir_f->highest_version);
564 rd->ino = cpu_to_je32(inode->i_ino);
565 rd->mctime = cpu_to_je32(get_seconds());
566 rd->nsize = namelen;
567 rd->type = DT_DIR;
568 rd->node_crc = cpu_to_je32(crc32(0, rd, sizeof(*rd)-8));
569 rd->name_crc = cpu_to_je32(crc32(0, dentry->d_name.name, namelen));
570
571 fd = jffs2_write_dirent(c, dir_f, rd, dentry->d_name.name, namelen, ALLOC_NORMAL);
572
573 if (IS_ERR(fd)) {
574
575
576 jffs2_complete_reservation(c);
577 jffs2_free_raw_dirent(rd);
578 mutex_unlock(&dir_f->sem);
579 ret = PTR_ERR(fd);
580 goto fail;
581 }
582
583 dir_i->i_mtime = dir_i->i_ctime = ITIME(je32_to_cpu(rd->mctime));
584 inc_nlink(dir_i);
585
586 jffs2_free_raw_dirent(rd);
587
588
589
590 jffs2_add_fd_to_list(c, fd, &dir_f->dents);
591
592 mutex_unlock(&dir_f->sem);
593 jffs2_complete_reservation(c);
594
595 d_instantiate(dentry, inode);
596 unlock_new_inode(inode);
597 return 0;
598
599 fail:
600 iget_failed(inode);
601 return ret;
602}
603
604static int jffs2_rmdir (struct inode *dir_i, struct dentry *dentry)
605{
606 struct jffs2_sb_info *c = JFFS2_SB_INFO(dir_i->i_sb);
607 struct jffs2_inode_info *dir_f = JFFS2_INODE_INFO(dir_i);
608 struct jffs2_inode_info *f = JFFS2_INODE_INFO(dentry->d_inode);
609 struct jffs2_full_dirent *fd;
610 int ret;
611 uint32_t now = get_seconds();
612
613 for (fd = f->dents ; fd; fd = fd->next) {
614 if (fd->ino)
615 return -ENOTEMPTY;
616 }
617
618 ret = jffs2_do_unlink(c, dir_f, dentry->d_name.name,
619 dentry->d_name.len, f, now);
620 if (!ret) {
621 dir_i->i_mtime = dir_i->i_ctime = ITIME(now);
622 clear_nlink(dentry->d_inode);
623 drop_nlink(dir_i);
624 }
625 return ret;
626}
627
628static int jffs2_mknod (struct inode *dir_i, struct dentry *dentry, int mode, dev_t rdev)
629{
630 struct jffs2_inode_info *f, *dir_f;
631 struct jffs2_sb_info *c;
632 struct inode *inode;
633 struct jffs2_raw_inode *ri;
634 struct jffs2_raw_dirent *rd;
635 struct jffs2_full_dnode *fn;
636 struct jffs2_full_dirent *fd;
637 int namelen;
638 union jffs2_device_node dev;
639 int devlen = 0;
640 uint32_t alloclen;
641 int ret;
642
643 if (!new_valid_dev(rdev))
644 return -EINVAL;
645
646 ri = jffs2_alloc_raw_inode();
647 if (!ri)
648 return -ENOMEM;
649
650 c = JFFS2_SB_INFO(dir_i->i_sb);
651
652 if (S_ISBLK(mode) || S_ISCHR(mode))
653 devlen = jffs2_encode_dev(&dev, rdev);
654
655
656
657
658 namelen = dentry->d_name.len;
659 ret = jffs2_reserve_space(c, sizeof(*ri) + devlen, &alloclen,
660 ALLOC_NORMAL, JFFS2_SUMMARY_INODE_SIZE);
661
662 if (ret) {
663 jffs2_free_raw_inode(ri);
664 return ret;
665 }
666
667 inode = jffs2_new_inode(dir_i, mode, ri);
668
669 if (IS_ERR(inode)) {
670 jffs2_free_raw_inode(ri);
671 jffs2_complete_reservation(c);
672 return PTR_ERR(inode);
673 }
674 inode->i_op = &jffs2_file_inode_operations;
675 init_special_inode(inode, inode->i_mode, rdev);
676
677 f = JFFS2_INODE_INFO(inode);
678
679 ri->dsize = ri->csize = cpu_to_je32(devlen);
680 ri->totlen = cpu_to_je32(sizeof(*ri) + devlen);
681 ri->hdr_crc = cpu_to_je32(crc32(0, ri, sizeof(struct jffs2_unknown_node)-4));
682
683 ri->compr = JFFS2_COMPR_NONE;
684 ri->data_crc = cpu_to_je32(crc32(0, &dev, devlen));
685 ri->node_crc = cpu_to_je32(crc32(0, ri, sizeof(*ri)-8));
686
687 fn = jffs2_write_dnode(c, f, ri, (char *)&dev, devlen, ALLOC_NORMAL);
688
689 jffs2_free_raw_inode(ri);
690
691 if (IS_ERR(fn)) {
692
693 mutex_unlock(&f->sem);
694 jffs2_complete_reservation(c);
695 ret = PTR_ERR(fn);
696 goto fail;
697 }
698
699
700
701 f->metadata = fn;
702 mutex_unlock(&f->sem);
703
704 jffs2_complete_reservation(c);
705
706 ret = jffs2_init_security(inode, dir_i);
707 if (ret)
708 goto fail;
709
710 ret = jffs2_init_acl_post(inode);
711 if (ret)
712 goto fail;
713
714 ret = jffs2_reserve_space(c, sizeof(*rd)+namelen, &alloclen,
715 ALLOC_NORMAL, JFFS2_SUMMARY_DIRENT_SIZE(namelen));
716 if (ret)
717 goto fail;
718
719 rd = jffs2_alloc_raw_dirent();
720 if (!rd) {
721
722 jffs2_complete_reservation(c);
723 ret = -ENOMEM;
724 goto fail;
725 }
726
727 dir_f = JFFS2_INODE_INFO(dir_i);
728 mutex_lock(&dir_f->sem);
729
730 rd->magic = cpu_to_je16(JFFS2_MAGIC_BITMASK);
731 rd->nodetype = cpu_to_je16(JFFS2_NODETYPE_DIRENT);
732 rd->totlen = cpu_to_je32(sizeof(*rd) + namelen);
733 rd->hdr_crc = cpu_to_je32(crc32(0, rd, sizeof(struct jffs2_unknown_node)-4));
734
735 rd->pino = cpu_to_je32(dir_i->i_ino);
736 rd->version = cpu_to_je32(++dir_f->highest_version);
737 rd->ino = cpu_to_je32(inode->i_ino);
738 rd->mctime = cpu_to_je32(get_seconds());
739 rd->nsize = namelen;
740
741
742 rd->type = (mode & S_IFMT) >> 12;
743
744 rd->node_crc = cpu_to_je32(crc32(0, rd, sizeof(*rd)-8));
745 rd->name_crc = cpu_to_je32(crc32(0, dentry->d_name.name, namelen));
746
747 fd = jffs2_write_dirent(c, dir_f, rd, dentry->d_name.name, namelen, ALLOC_NORMAL);
748
749 if (IS_ERR(fd)) {
750
751
752 jffs2_complete_reservation(c);
753 jffs2_free_raw_dirent(rd);
754 mutex_unlock(&dir_f->sem);
755 ret = PTR_ERR(fd);
756 goto fail;
757 }
758
759 dir_i->i_mtime = dir_i->i_ctime = ITIME(je32_to_cpu(rd->mctime));
760
761 jffs2_free_raw_dirent(rd);
762
763
764
765 jffs2_add_fd_to_list(c, fd, &dir_f->dents);
766
767 mutex_unlock(&dir_f->sem);
768 jffs2_complete_reservation(c);
769
770 d_instantiate(dentry, inode);
771 unlock_new_inode(inode);
772 return 0;
773
774 fail:
775 iget_failed(inode);
776 return ret;
777}
778
779static int jffs2_rename (struct inode *old_dir_i, struct dentry *old_dentry,
780 struct inode *new_dir_i, struct dentry *new_dentry)
781{
782 int ret;
783 struct jffs2_sb_info *c = JFFS2_SB_INFO(old_dir_i->i_sb);
784 struct jffs2_inode_info *victim_f = NULL;
785 uint8_t type;
786 uint32_t now;
787
788
789
790
791
792
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;
797
798 mutex_lock(&victim_f->sem);
799 for (fd = victim_f->dents; fd; fd = fd->next) {
800 if (fd->ino) {
801 mutex_unlock(&victim_f->sem);
802 return -ENOTEMPTY;
803 }
804 }
805 mutex_unlock(&victim_f->sem);
806 }
807 }
808
809
810
811
812
813
814
815
816
817 type = (old_dentry->d_inode->i_mode & S_IFMT) >> 12;
818 if (!type) type = DT_REG;
819
820 now = get_seconds();
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);
824
825 if (ret)
826 return ret;
827
828 if (victim_f) {
829
830 drop_nlink(new_dentry->d_inode);
831
832
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;
837 else
838 victim_f->inocache->pino_nlink--;
839 mutex_unlock(&victim_f->sem);
840 }
841 }
842
843
844
845 if (S_ISDIR(old_dentry->d_inode->i_mode) && !victim_f)
846 inc_nlink(new_dir_i);
847
848
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);
851
852
853
854 if (ret) {
855
856 struct jffs2_inode_info *f = JFFS2_INODE_INFO(old_dentry->d_inode);
857 mutex_lock(&f->sem);
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);
862
863 printk(KERN_NOTICE "jffs2_rename(): Link succeeded, unlink failed (err %d). You now have a hard link\n", ret);
864
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);
868 return ret;
869 }
870
871 if (S_ISDIR(old_dentry->d_inode->i_mode))
872 drop_nlink(old_dir_i);
873
874 new_dir_i->i_mtime = new_dir_i->i_ctime = old_dir_i->i_mtime = old_dir_i->i_ctime = ITIME(now);
875
876 return 0;
877}
878
879
