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12#include <linux/kernel.h>
13#include <linux/sched.h>
14#include <linux/fs.h>
15#include <linux/mtd/mtd.h>
16#include <linux/rbtree.h>
17#include <linux/crc32.h>
18#include <linux/pagemap.h>
19#include "nodelist.h"
20
21static void jffs2_obsolete_node_frag(struct jffs2_sb_info *c,
22 struct jffs2_node_frag *this);
23
24void jffs2_add_fd_to_list(struct jffs2_sb_info *c, struct jffs2_full_dirent *new, struct jffs2_full_dirent **list)
25{
26 struct jffs2_full_dirent **prev = list;
27
28 dbg_dentlist("add dirent \"%s\", ino #%u\n", new->name, new->ino);
29
30 while ((*prev) && (*prev)->nhash <= new->nhash) {
31 if ((*prev)->nhash == new->nhash && !strcmp((*prev)->name, new->name)) {
32
33 if (new->version < (*prev)->version) {
34 dbg_dentlist("Eep! Marking new dirent node obsolete, old is \"%s\", ino #%u\n",
35 (*prev)->name, (*prev)->ino);
36 jffs2_mark_node_obsolete(c, new->raw);
37 jffs2_free_full_dirent(new);
38 } else {
39 dbg_dentlist("marking old dirent \"%s\", ino #%u obsolete\n",
40 (*prev)->name, (*prev)->ino);
41 new->next = (*prev)->next;
42
43
44 if ((*prev)->raw)
45 jffs2_mark_node_obsolete(c, ((*prev)->raw));
46 jffs2_free_full_dirent(*prev);
47 *prev = new;
48 }
49 return;
50 }
51 prev = &((*prev)->next);
52 }
53 new->next = *prev;
54 *prev = new;
55}
56
57uint32_t jffs2_truncate_fragtree(struct jffs2_sb_info *c, struct rb_root *list, uint32_t size)
58{
59 struct jffs2_node_frag *frag = jffs2_lookup_node_frag(list, size);
60
61 dbg_fragtree("truncating fragtree to 0x%08x bytes\n", size);
62
63
64 if (frag && frag->ofs != size) {
65 if (frag->ofs+frag->size > size) {
66 frag->size = size - frag->ofs;
67 }
68 frag = frag_next(frag);
69 }
70 while (frag && frag->ofs >= size) {
71 struct jffs2_node_frag *next = frag_next(frag);
72
73 frag_erase(frag, list);
74 jffs2_obsolete_node_frag(c, frag);
75 frag = next;
76 }
77
78 if (size == 0)
79 return 0;
80
81 frag = frag_last(list);
82
83
84 if (!frag)
85 return 0;
86 if (frag->ofs + frag->size < size)
87 return frag->ofs + frag->size;
88
89
90
91 if (frag->node && (frag->ofs & (PAGE_CACHE_SIZE - 1)) == 0) {
92 dbg_fragtree2("marking the last fragment 0x%08x-0x%08x REF_PRISTINE.\n",
93 frag->ofs, frag->ofs + frag->size);
94 frag->node->raw->flash_offset = ref_offset(frag->node->raw) | REF_PRISTINE;
95 }
96 return size;
97}
98
99static void jffs2_obsolete_node_frag(struct jffs2_sb_info *c,
100 struct jffs2_node_frag *this)
101{
102 if (this->node) {
103 this->node->frags--;
104 if (!this->node->frags) {
105
106 dbg_fragtree2("marking old node @0x%08x (0x%04x-0x%04x) obsolete\n",
107 ref_offset(this->node->raw), this->node->ofs, this->node->ofs+this->node->size);
108 jffs2_mark_node_obsolete(c, this->node->raw);
109 jffs2_free_full_dnode(this->node);
110 } else {
111 dbg_fragtree2("marking old node @0x%08x (0x%04x-0x%04x) REF_NORMAL. frags is %d\n",
112 ref_offset(this->node->raw), this->node->ofs, this->node->ofs+this->node->size, this->node->frags);
113 mark_ref_normal(this->node->raw);
114 }
115
116 }
117 jffs2_free_node_frag(this);
118}
119
120static void jffs2_fragtree_insert(struct jffs2_node_frag *newfrag, struct jffs2_node_frag *base)
121{
122 struct rb_node *parent = &base->rb;
123 struct rb_node **link = &parent;
124
125 dbg_fragtree2("insert frag (0x%04x-0x%04x)\n", newfrag->ofs, newfrag->ofs + newfrag->size);
126
127 while (*link) {
128 parent = *link;
129 base = rb_entry(parent, struct jffs2_node_frag, rb);
130
131 if (newfrag->ofs > base->ofs)
132 link = &base->rb.rb_right;
133 else if (newfrag->ofs < base->ofs)
134 link = &base->rb.rb_left;
135 else {
136 JFFS2_ERROR("duplicate frag at %08x (%p,%p)\n", newfrag->ofs, newfrag, base);
137 BUG();
138 }
139 }
140
141 rb_link_node(&newfrag->rb, &base->rb, link);
142}
143
144
145
146
147static struct jffs2_node_frag * new_fragment(struct jffs2_full_dnode *fn, uint32_t ofs, uint32_t size)
148{
149 struct jffs2_node_frag *newfrag;
150
151 newfrag = jffs2_alloc_node_frag();
152 if (likely(newfrag)) {
153 newfrag->ofs = ofs;
154 newfrag->size = size;
155 newfrag->node = fn;
156 } else {
157 JFFS2_ERROR("cannot allocate a jffs2_node_frag object\n");
158 }
159
160 return newfrag;
161}
162
163
164
165
166
167static int no_overlapping_node(struct jffs2_sb_info *c, struct rb_root *root,
168 struct jffs2_node_frag *newfrag,
169 struct jffs2_node_frag *this, uint32_t lastend)
170{
171 if (lastend < newfrag->node->ofs) {
172
173 struct jffs2_node_frag *holefrag;
174
175 holefrag= new_fragment(NULL, lastend, newfrag->node->ofs - lastend);
176 if (unlikely(!holefrag)) {
177 jffs2_free_node_frag(newfrag);
178 return -ENOMEM;
179 }
180
181 if (this) {
182
183
184
185 dbg_fragtree2("add hole frag %#04x-%#04x on the right of the new frag.\n",
186 holefrag->ofs, holefrag->ofs + holefrag->size);
187 rb_link_node(&holefrag->rb, &this->rb, &this->rb.rb_right);
188 } else {
189 dbg_fragtree2("Add hole frag %#04x-%#04x to the root of the tree.\n",
190 holefrag->ofs, holefrag->ofs + holefrag->size);
191 rb_link_node(&holefrag->rb, NULL, &root->rb_node);
192 }
193 rb_insert_color(&holefrag->rb, root);
194 this = holefrag;
195 }
196
197 if (this) {
198
199
200
201 dbg_fragtree2("add the new node at the right\n");
202 rb_link_node(&newfrag->rb, &this->rb, &this->rb.rb_right);
203 } else {
204 dbg_fragtree2("insert the new node at the root of the tree\n");
205 rb_link_node(&newfrag->rb, NULL, &root->rb_node);
206 }
207 rb_insert_color(&newfrag->rb, root);
208
209 return 0;
210}
211
212
213static int jffs2_add_frag_to_fragtree(struct jffs2_sb_info *c, struct rb_root *root, struct jffs2_node_frag *newfrag)
214{
215 struct jffs2_node_frag *this;
216 uint32_t lastend;
217
218
219 this = jffs2_lookup_node_frag(root, newfrag->node->ofs);
220
221 if (this) {
222 dbg_fragtree2("lookup gave frag 0x%04x-0x%04x; phys 0x%08x (*%p)\n",
223 this->ofs, this->ofs+this->size, this->node?(ref_offset(this->node->raw)):0xffffffff, this);
224 lastend = this->ofs + this->size;
225 } else {
226 dbg_fragtree2("lookup gave no frag\n");
227 lastend = 0;
228 }
229
230
231 if (lastend <= newfrag->ofs) {
232
233
234
235
236
237
238 if (lastend && (lastend-1) >> PAGE_CACHE_SHIFT == newfrag->ofs >> PAGE_CACHE_SHIFT) {
239 if (this->node)
240 mark_ref_normal(this->node->raw);
241 mark_ref_normal(newfrag->node->raw);
242 }
243
244 return no_overlapping_node(c, root, newfrag, this, lastend);
245 }
246
247 if (this->node)
248 dbg_fragtree2("dealing with frag %u-%u, phys %#08x(%d).\n",
249 this->ofs, this->ofs + this->size,
250 ref_offset(this->node->raw), ref_flags(this->node->raw));
251 else
252 dbg_fragtree2("dealing with hole frag %u-%u.\n",
253 this->ofs, this->ofs + this->size);
254
255
256
257
258 if (newfrag->ofs > this->ofs) {
259
260
261
262
263 mark_ref_normal(newfrag->node->raw);
264 if (this->node)
265 mark_ref_normal(this->node->raw);
266
267 if (this->ofs + this->size > newfrag->ofs + newfrag->size) {
268
269 struct jffs2_node_frag *newfrag2;
270
271 if (this->node)
272 dbg_fragtree2("split old frag 0x%04x-0x%04x, phys 0x%08x\n",
273 this->ofs, this->ofs+this->size, ref_offset(this->node->raw));
274 else
275 dbg_fragtree2("split old hole frag 0x%04x-0x%04x\n",
276 this->ofs, this->ofs+this->size);
277
278
279 newfrag2 = new_fragment(this->node, newfrag->ofs + newfrag->size,
280 this->ofs + this->size - newfrag->ofs - newfrag->size);
281 if (unlikely(!newfrag2))
282 return -ENOMEM;
283 if (this->node)
284 this->node->frags++;
285
286
287 this->size = newfrag->ofs - this->ofs;
288
289
290
291
292
293
294
295 jffs2_fragtree_insert(newfrag, this);
296 rb_insert_color(&newfrag->rb, root);
297
298 jffs2_fragtree_insert(newfrag2, newfrag);
299 rb_insert_color(&newfrag2->rb, root);
300
301 return 0;
302 }
303
304 this->size = newfrag->ofs - this->ofs;
305
306
307 jffs2_fragtree_insert(newfrag, this);
308 rb_insert_color(&newfrag->rb, root);
309 } else {
310
311
312 dbg_fragtree2("inserting newfrag (*%p),%d-%d in before 'this' (*%p),%d-%d\n",
313 newfrag, newfrag->ofs, newfrag->ofs+newfrag->size, this, this->ofs, this->ofs+this->size);
314
315 rb_replace_node(&this->rb, &newfrag->rb, root);
316
317 if (newfrag->ofs + newfrag->size >= this->ofs+this->size) {
318 dbg_fragtree2("obsoleting node frag %p (%x-%x)\n", this, this->ofs, this->ofs+this->size);
319 jffs2_obsolete_node_frag(c, this);
320 } else {
321 this->ofs += newfrag->size;
322 this->size -= newfrag->size;
323
324 jffs2_fragtree_insert(this, newfrag);
325 rb_insert_color(&this->rb, root);
326 return 0;
327 }
328 }
329
330
331
332 while ((this = frag_next(newfrag)) && newfrag->ofs + newfrag->size >= this->ofs + this->size) {
333
334 dbg_fragtree2("obsoleting node frag %p (%x-%x) and removing from tree\n",
335 this, this->ofs, this->ofs+this->size);
336 rb_erase(&this->rb, root);
337 jffs2_obsolete_node_frag(c, this);
338 }
339
340
341
342 if (!this || newfrag->ofs + newfrag->size == this->ofs)
343 return 0;
344
345
346 this->size = (this->ofs + this->size) - (newfrag->ofs + newfrag->size);
347 this->ofs = newfrag->ofs + newfrag->size;
348
349
350 if (this->node)
351 mark_ref_normal(this->node->raw);
352 mark_ref_normal(newfrag->node->raw);
353
354 return 0;
355}
356
357
358
359
360
361int jffs2_add_full_dnode_to_inode(struct jffs2_sb_info *c, struct jffs2_inode_info *f, struct jffs2_full_dnode *fn)
362{
363 int ret;
364 struct jffs2_node_frag *newfrag;
365
366 if (unlikely(!fn->size))
367 return 0;
368
369 newfrag = new_fragment(fn, fn->ofs, fn->size);
370 if (unlikely(!newfrag))
371 return -ENOMEM;
372 newfrag->node->frags = 1;
373
374 dbg_fragtree("adding node %#04x-%#04x @0x%08x on flash, newfrag *%p\n",
375 fn->ofs, fn->ofs+fn->size, ref_offset(fn->raw), newfrag);
376
377 ret = jffs2_add_frag_to_fragtree(c, &f->fragtree, newfrag);
378 if (unlikely(ret))
379 return ret;
380
381
382
383 if (newfrag->ofs & (PAGE_CACHE_SIZE-1)) {
384 struct jffs2_node_frag *prev = frag_prev(newfrag);
385
386 mark_ref_normal(fn->raw);
387
388 if (prev->node)
389 mark_ref_normal(prev->node->raw);
390 }
391
392 if ((newfrag->ofs+newfrag->size) & (PAGE_CACHE_SIZE-1)) {
393 struct jffs2_node_frag *next = frag_next(newfrag);
394
395 if (next) {
396 mark_ref_normal(fn->raw);
397 if (next->node)
398 mark_ref_normal(next->node->raw);
399 }
400 }
401 jffs2_dbg_fragtree_paranoia_check_nolock(f);
402
403 return 0;
404}
405
406void jffs2_set_inocache_state(struct jffs2_sb_info *c, struct jffs2_inode_cache *ic, int state)
407{
408 spin_lock(&c->inocache_lock);
409 ic->state = state;
410 wake_up(&c->inocache_wq);
411 spin_unlock(&c->inocache_lock);
412}
413
414
415
416
417
418
419struct jffs2_inode_cache *jffs2_get_ino_cache(struct jffs2_sb_info *c, uint32_t ino)
420{
421 struct jffs2_inode_cache *ret;
422
423 ret = c->inocache_list[ino % c->inocache_hashsize];
424 while (ret && ret->ino < ino) {
425 ret = ret->next;
426 }
427
428 if (ret && ret->ino != ino)
429 ret = NULL;
430
431 return ret;
432}
433
434void jffs2_add_ino_cache (struct jffs2_sb_info *c, struct jffs2_inode_cache *new)
435{
436 struct jffs2_inode_cache **prev;
437
438 spin_lock(&c->inocache_lock);
439 if (!new->ino)
440 new->ino = ++c->highest_ino;
441
442 dbg_inocache("add %p (ino #%u)\n", new, new->ino);
443
444 prev = &c->inocache_list[new->ino % c->inocache_hashsize];
445
446 while ((*prev) && (*prev)->ino < new->ino) {
447 prev = &(*prev)->next;
448 }
449 new->next = *prev;
450 *prev = new;
451
452 spin_unlock(&c->inocache_lock);
453}
454
455void jffs2_del_ino_cache(struct jffs2_sb_info *c, struct jffs2_inode_cache *old)
456{
457 struct jffs2_inode_cache **prev;
458
459#ifdef CONFIG_JFFS2_FS_XATTR
460 BUG_ON(old->xref);
461#endif
462 dbg_inocache("del %p (ino #%u)\n", old, old->ino);
463 spin_lock(&c->inocache_lock);
464
465 prev = &c->inocache_list[old->ino % c->inocache_hashsize];
466
467 while ((*prev) && (*prev)->ino < old->ino) {
468 prev = &(*prev)->next;
469 }
470 if ((*prev) == old) {
471 *prev = old->next;
472 }
473
474
475
476
477
478
479 if (old->state != INO_STATE_READING && old->state != INO_STATE_CLEARING)
480 jffs2_free_inode_cache(old);
481
482 spin_unlock(&c->inocache_lock);
483}
484
485void jffs2_free_ino_caches(struct jffs2_sb_info *c)
486{
487 int i;
488 struct jffs2_inode_cache *this, *next;
489
490 for (i=0; i < c->inocache_hashsize; i++) {
491 this = c->inocache_list[i];
492 while (this) {
493 next = this->next;
494 jffs2_xattr_free_inode(c, this);
495 jffs2_free_inode_cache(this);
496 this = next;
497 }
498 c->inocache_list[i] = NULL;
499 }
500}
501
502void jffs2_free_raw_node_refs(struct jffs2_sb_info *c)
503{
504 int i;
505 struct jffs2_raw_node_ref *this, *next;
506
507 for (i=0; i<c->nr_blocks; i++) {
508 this = c->blocks[i].first_node;
509 while (this) {
510 if (this[REFS_PER_BLOCK].flash_offset == REF_LINK_NODE)
511 next = this[REFS_PER_BLOCK].next_in_ino;
512 else
513 next = NULL;
514
515 jffs2_free_refblock(this);
516 this = next;
517 }
518 c->blocks[i].first_node = c->blocks[i].last_node = NULL;
519 }
520}
521
522struct jffs2_node_frag *jffs2_lookup_node_frag(struct rb_root *fragtree, uint32_t offset)
523{
524
525
526 struct rb_node *next;
527 struct jffs2_node_frag *prev = NULL;
528 struct jffs2_node_frag *frag = NULL;
529
530 dbg_fragtree2("root %p, offset %d\n", fragtree, offset);
531
532 next = fragtree->rb_node;
533
534 while(next) {
535 frag = rb_entry(next, struct jffs2_node_frag, rb);
536
537 if (frag->ofs + frag->size <= offset) {
538
539 if (!prev || frag->ofs > prev->ofs)
540 prev = frag;
541 next = frag->rb.rb_right;
542 } else if (frag->ofs > offset) {
543 next = frag->rb.rb_left;
544 } else {
545 return frag;
546 }
547 }
548
549
550
551
552 if (prev)
553 dbg_fragtree2("no match. Returning frag %#04x-%#04x, closest previous\n",
554 prev->ofs, prev->ofs+prev->size);
555 else
556 dbg_fragtree2("returning NULL, empty fragtree\n");
557
558 return prev;
559}
560
561
562
563void jffs2_kill_fragtree(struct rb_root *root, struct jffs2_sb_info *c)
564{
565 struct jffs2_node_frag *frag;
566 struct jffs2_node_frag *parent;
567
568 if (!root->rb_node)
569 return;
570
571 dbg_fragtree("killing\n");
572
573 frag = (rb_entry(root->rb_node, struct jffs2_node_frag, rb));
574 while(frag) {
575 if (frag->rb.rb_left) {
576 frag = frag_left(frag);
577 continue;
578 }
579 if (frag->rb.rb_right) {
580 frag = frag_right(frag);
581 continue;
582 }
583
584 if (frag->node && !(--frag->node->frags)) {
585
586
587 if (c)
588 jffs2_mark_node_obsolete(c, frag->node->raw);
589
590 jffs2_free_full_dnode(frag->node);
591 }
592 parent = frag_parent(frag);
593 if (parent) {
594 if (frag_left(parent) == frag)
595 parent->rb.rb_left = NULL;
596 else
597 parent->rb.rb_right = NULL;
598 }
599
600 jffs2_free_node_frag(frag);
601 frag = parent;
602
603 cond_resched();
604 }
605}
606
607struct jffs2_raw_node_ref *jffs2_link_node_ref(struct jffs2_sb_info *c,
608 struct jffs2_eraseblock *jeb,
609 uint32_t ofs, uint32_t len,
610 struct jffs2_inode_cache *ic)
611{
612 struct jffs2_raw_node_ref *ref;
613
614 BUG_ON(!jeb->allocated_refs);
615 jeb->allocated_refs--;
616
617 ref = jeb->last_node;
618
619 dbg_noderef("Last node at %p is (%08x,%p)\n", ref, ref->flash_offset,
620 ref->next_in_ino);
621
622 while (ref->flash_offset != REF_EMPTY_NODE) {
623 if (ref->flash_offset == REF_LINK_NODE)
624 ref = ref->next_in_ino;
625 else
626 ref++;
627 }
628
629 dbg_noderef("New ref is %p (%08x becomes %08x,%p) len 0x%x\n", ref,
630 ref->flash_offset, ofs, ref->next_in_ino, len);
631
632 ref->flash_offset = ofs;
633
634 if (!jeb->first_node) {
635 jeb->first_node = ref;
636 BUG_ON(ref_offset(ref) != jeb->offset);
637 } else if (unlikely(ref_offset(ref) != jeb->offset + c->sector_size - jeb->free_size)) {
638 uint32_t last_len = ref_totlen(c, jeb, jeb->last_node);
639
640 JFFS2_ERROR("Adding new ref %p at (0x%08x-0x%08x) not immediately after previous (0x%08x-0x%08x)\n",
641 ref, ref_offset(ref), ref_offset(ref)+len,
642 ref_offset(jeb->last_node),
643 ref_offset(jeb->last_node)+last_len);
644 BUG();
645 }
646 jeb->last_node = ref;
647
648 if (ic) {
649 ref->next_in_ino = ic->nodes;
650 ic->nodes = ref;
651 } else {
652 ref->next_in_ino = NULL;
653 }
654
655 switch(ref_flags(ref)) {
656 case REF_UNCHECKED:
657 c->unchecked_size += len;
658 jeb->unchecked_size += len;
659 break;
660
661 case REF_NORMAL:
662 case REF_PRISTINE:
663 c->used_size += len;
664 jeb->used_size += len;
665 break;
666
667 case REF_OBSOLETE:
668 c->dirty_size += len;
669 jeb->dirty_size += len;
670 break;
671 }
672 c->free_size -= len;
673 jeb->free_size -= len;
674
675#ifdef TEST_TOTLEN
676
677 ref->__totlen = len;
678 ref_totlen(c, jeb, ref);
679#endif
680 return ref;
681}
682
683
684int jffs2_scan_dirty_space(struct jffs2_sb_info *c, struct jffs2_eraseblock *jeb,
685 uint32_t size)
686{
687 if (!size)
688 return 0;
689 if (unlikely(size > jeb->free_size)) {
690 printk(KERN_CRIT "Dirty space 0x%x larger then free_size 0x%x (wasted 0x%x)\n",
691 size, jeb->free_size, jeb->wasted_size);
692 BUG();
693 }
694
695 if (jeb->last_node && ref_obsolete(jeb->last_node)) {
696#ifdef TEST_TOTLEN
697 jeb->last_node->__totlen += size;
698#endif
699 c->dirty_size += size;
700 c->free_size -= size;
701 jeb->dirty_size += size;
702 jeb->free_size -= size;
703 } else {
704 uint32_t ofs = jeb->offset + c->sector_size - jeb->free_size;
705 ofs |= REF_OBSOLETE;
706
707 jffs2_link_node_ref(c, jeb, ofs, size, NULL);
708 }
709
710 return 0;
711}
712
713
714static inline uint32_t __ref_totlen(struct jffs2_sb_info *c,
715 struct jffs2_eraseblock *jeb,
716 struct jffs2_raw_node_ref *ref)
717{
718 uint32_t ref_end;
719 struct jffs2_raw_node_ref *next_ref = ref_next(ref);
720
721 if (next_ref)
722 ref_end = ref_offset(next_ref);
723 else {
724 if (!jeb)
725 jeb = &c->blocks[ref->flash_offset / c->sector_size];
726
727
728 if (unlikely(ref != jeb->last_node)) {
729 printk(KERN_CRIT "ref %p @0x%08x is not jeb->last_node (%p @0x%08x)\n",
730 ref, ref_offset(ref), jeb->last_node, jeb->last_node?ref_offset(jeb->last_node):0);
731 BUG();
732 }
733 ref_end = jeb->offset + c->sector_size - jeb->free_size;
734 }
735 return ref_end - ref_offset(ref);
736}
737
738uint32_t __jffs2_ref_totlen(struct jffs2_sb_info *c, struct jffs2_eraseblock *jeb,
739 struct jffs2_raw_node_ref *ref)
740{
741 uint32_t ret;
742
743 ret = __ref_totlen(c, jeb, ref);
744
745#ifdef TEST_TOTLEN
746 if (unlikely(ret != ref->__totlen)) {
747 if (!jeb)
748 jeb = &c->blocks[ref->flash_offset / c->sector_size];
749
750 printk(KERN_CRIT "Totlen for ref at %p (0x%08x-0x%08x) miscalculated as 0x%x instead of %x\n",
751 ref, ref_offset(ref), ref_offset(ref)+ref->__totlen,
752 ret, ref->__totlen);
753 if (ref_next(ref)) {
754 printk(KERN_CRIT "next %p (0x%08x-0x%08x)\n", ref_next(ref), ref_offset(ref_next(ref)),
755 ref_offset(ref_next(ref))+ref->__totlen);
756 } else
757 printk(KERN_CRIT "No next ref. jeb->last_node is %p\n", jeb->last_node);
758
759 printk(KERN_CRIT "jeb->wasted_size %x, dirty_size %x, used_size %x, free_size %x\n", jeb->wasted_size, jeb->dirty_size, jeb->used_size, jeb->free_size);
760
761#if defined(JFFS2_DBG_DUMPS) || defined(JFFS2_DBG_PARANOIA_CHECKS)
762 __jffs2_dbg_dump_node_refs_nolock(c, jeb);
763#endif
764
765 WARN_ON(1);
766
767 ret = ref->__totlen;
768 }
769#endif
770 return ret;
771}
772