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12#ifndef __JFFS2_NODELIST_H__
13#define __JFFS2_NODELIST_H__
14
15#include <linux/fs.h>
16#include <linux/types.h>
17#include <linux/jffs2.h>
18#include "jffs2_fs_sb.h"
19#include "jffs2_fs_i.h"
20#include "xattr.h"
21#include "acl.h"
22#include "summary.h"
23
24#ifdef __ECOS
25#include "os-ecos.h"
26#else
27#include <linux/mtd/compatmac.h>
28#include "os-linux.h"
29#endif
30
31#define JFFS2_NATIVE_ENDIAN
32
33
34
35
36#if defined(JFFS2_NATIVE_ENDIAN)
37#define cpu_to_je16(x) ((jint16_t){x})
38#define cpu_to_je32(x) ((jint32_t){x})
39#define cpu_to_jemode(x) ((jmode_t){os_to_jffs2_mode(x)})
40
41#define constant_cpu_to_je16(x) ((jint16_t){x})
42#define constant_cpu_to_je32(x) ((jint32_t){x})
43
44#define je16_to_cpu(x) ((x).v16)
45#define je32_to_cpu(x) ((x).v32)
46#define jemode_to_cpu(x) (jffs2_to_os_mode((x).m))
47#elif defined(JFFS2_BIG_ENDIAN)
48#define cpu_to_je16(x) ((jint16_t){cpu_to_be16(x)})
49#define cpu_to_je32(x) ((jint32_t){cpu_to_be32(x)})
50#define cpu_to_jemode(x) ((jmode_t){cpu_to_be32(os_to_jffs2_mode(x))})
51
52#define constant_cpu_to_je16(x) ((jint16_t){__constant_cpu_to_be16(x)})
53#define constant_cpu_to_je32(x) ((jint32_t){__constant_cpu_to_be32(x)})
54
55#define je16_to_cpu(x) (be16_to_cpu(x.v16))
56#define je32_to_cpu(x) (be32_to_cpu(x.v32))
57#define jemode_to_cpu(x) (be32_to_cpu(jffs2_to_os_mode((x).m)))
58#elif defined(JFFS2_LITTLE_ENDIAN)
59#define cpu_to_je16(x) ((jint16_t){cpu_to_le16(x)})
60#define cpu_to_je32(x) ((jint32_t){cpu_to_le32(x)})
61#define cpu_to_jemode(x) ((jmode_t){cpu_to_le32(os_to_jffs2_mode(x))})
62
63#define constant_cpu_to_je16(x) ((jint16_t){__constant_cpu_to_le16(x)})
64#define constant_cpu_to_je32(x) ((jint32_t){__constant_cpu_to_le32(x)})
65
66#define je16_to_cpu(x) (le16_to_cpu(x.v16))
67#define je32_to_cpu(x) (le32_to_cpu(x.v32))
68#define jemode_to_cpu(x) (le32_to_cpu(jffs2_to_os_mode((x).m)))
69#else
70#error wibble
71#endif
72
73
74#define JFFS2_MIN_NODE_HEADER sizeof(struct jffs2_raw_dirent)
75
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78
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80
81
82
83struct jffs2_raw_node_ref
84{
85 struct jffs2_raw_node_ref *next_in_ino;
86
87
88
89 uint32_t flash_offset;
90#undef TEST_TOTLEN
91#ifdef TEST_TOTLEN
92 uint32_t __totlen;
93#endif
94};
95
96#define REF_LINK_NODE ((int32_t)-1)
97#define REF_EMPTY_NODE ((int32_t)-2)
98
99
100#define REFS_PER_BLOCK ((255/sizeof(struct jffs2_raw_node_ref))-1)
101
102static inline struct jffs2_raw_node_ref *ref_next(struct jffs2_raw_node_ref *ref)
103{
104 ref++;
105
106
107 if (ref->flash_offset == REF_LINK_NODE) {
108 ref = ref->next_in_ino;
109 if (!ref)
110 return ref;
111 }
112
113
114 if (ref->flash_offset == REF_EMPTY_NODE)
115 return NULL;
116
117 return ref;
118}
119
120static inline struct jffs2_inode_cache *jffs2_raw_ref_to_ic(struct jffs2_raw_node_ref *raw)
121{
122 while(raw->next_in_ino)
123 raw = raw->next_in_ino;
124
125
126
127 return ((struct jffs2_inode_cache *)raw);
128}
129
130
131
132
133#define REF_UNCHECKED 0
134#define REF_OBSOLETE 1
135#define REF_PRISTINE 2
136#define REF_NORMAL 3
137#define ref_flags(ref) ((ref)->flash_offset & 3)
138#define ref_offset(ref) ((ref)->flash_offset & ~3)
139#define ref_obsolete(ref) (((ref)->flash_offset & 3) == REF_OBSOLETE)
140#define mark_ref_normal(ref) do { (ref)->flash_offset = ref_offset(ref) | REF_NORMAL; } while(0)
141
142
143
144
145#define dirent_node_state(rd) ( (je32_to_cpu((rd)->ino)?REF_PRISTINE:REF_NORMAL) )
146
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158
159struct jffs2_inode_cache {
160
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162
163
164 struct jffs2_full_dirent *scan_dents;
165
166
167
168 struct jffs2_raw_node_ref *nodes;
169 uint8_t class;
170
171
172
173 uint8_t flags;
174 uint16_t state;
175 uint32_t ino;
176 struct jffs2_inode_cache *next;
177#ifdef CONFIG_JFFS2_FS_XATTR
178 struct jffs2_xattr_ref *xref;
179#endif
180 uint32_t pino_nlink;
181
182
183
184};
185
186
187
188
189#define INO_STATE_UNCHECKED 0
190#define INO_STATE_CHECKING 1
191#define INO_STATE_PRESENT 2
192#define INO_STATE_CHECKEDABSENT 3
193#define INO_STATE_GC 4
194#define INO_STATE_READING 5
195#define INO_STATE_CLEARING 6
196
197#define INO_FLAGS_XATTR_CHECKED 0x01
198
199#define RAWNODE_CLASS_INODE_CACHE 0
200#define RAWNODE_CLASS_XATTR_DATUM 1
201#define RAWNODE_CLASS_XATTR_REF 2
202
203#define INOCACHE_HASHSIZE 128
204
205#define write_ofs(c) ((c)->nextblock->offset + (c)->sector_size - (c)->nextblock->free_size)
206
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209
210
211
212struct jffs2_full_dnode
213{
214 struct jffs2_raw_node_ref *raw;
215 uint32_t ofs;
216 uint32_t size;
217 uint32_t frags;
218
219
220};
221
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225
226
227struct jffs2_tmp_dnode_info
228{
229 struct rb_node rb;
230 struct jffs2_full_dnode *fn;
231 uint32_t version;
232 uint32_t data_crc;
233 uint32_t partial_crc;
234 uint16_t csize;
235 uint16_t overlapped;
236};
237
238
239struct jffs2_readinode_info
240{
241 struct rb_root tn_root;
242 struct jffs2_tmp_dnode_info *mdata_tn;
243 uint32_t highest_version;
244 uint32_t latest_mctime;
245 uint32_t mctime_ver;
246 struct jffs2_full_dirent *fds;
247 struct jffs2_raw_node_ref *latest_ref;
248};
249
250struct jffs2_full_dirent
251{
252 struct jffs2_raw_node_ref *raw;
253 struct jffs2_full_dirent *next;
254 uint32_t version;
255 uint32_t ino;
256 unsigned int nhash;
257 unsigned char type;
258 unsigned char name[0];
259};
260
261
262
263
264
265struct jffs2_node_frag
266{
267 struct rb_node rb;
268 struct jffs2_full_dnode *node;
269 uint32_t size;
270 uint32_t ofs;
271};
272
273struct jffs2_eraseblock
274{
275 struct list_head list;
276 int bad_count;
277 uint32_t offset;
278
279 uint32_t unchecked_size;
280 uint32_t used_size;
281 uint32_t dirty_size;
282 uint32_t wasted_size;
283 uint32_t free_size;
284
285 uint32_t allocated_refs;
286 struct jffs2_raw_node_ref *first_node;
287 struct jffs2_raw_node_ref *last_node;
288
289 struct jffs2_raw_node_ref *gc_node;
290};
291
292static inline int jffs2_blocks_use_vmalloc(struct jffs2_sb_info *c)
293{
294 return ((c->flash_size / c->sector_size) * sizeof (struct jffs2_eraseblock)) > (128 * 1024);
295}
296
297#define ref_totlen(a, b, c) __jffs2_ref_totlen((a), (b), (c))
298
299#define ALLOC_NORMAL 0
300#define ALLOC_DELETION 1
301#define ALLOC_GC 2
302#define ALLOC_NORETRY 3
303
304
305#define VERYDIRTY(c, size) ((size) >= ((c)->sector_size / 2))
306
307
308#define ISDIRTY(size) ((size) > sizeof (struct jffs2_raw_inode) + JFFS2_MIN_DATA_LEN)
309
310#define PAD(x) (((x)+3)&~3)
311
312static inline int jffs2_encode_dev(union jffs2_device_node *jdev, dev_t rdev)
313{
314 if (old_valid_dev(rdev)) {
315 jdev->old = cpu_to_je16(old_encode_dev(rdev));
316 return sizeof(jdev->old);
317 } else {
318 jdev->new = cpu_to_je32(new_encode_dev(rdev));
319 return sizeof(jdev->new);
320 }
321}
322
323static inline struct jffs2_node_frag *frag_first(struct rb_root *root)
324{
325 struct rb_node *node = rb_first(root);
326
327 if (!node)
328 return NULL;
329
330 return rb_entry(node, struct jffs2_node_frag, rb);
331}
332
333static inline struct jffs2_node_frag *frag_last(struct rb_root *root)
334{
335 struct rb_node *node = rb_last(root);
336
337 if (!node)
338 return NULL;
339
340 return rb_entry(node, struct jffs2_node_frag, rb);
341}
342
343#define frag_next(frag) rb_entry(rb_next(&(frag)->rb), struct jffs2_node_frag, rb)
344#define frag_prev(frag) rb_entry(rb_prev(&(frag)->rb), struct jffs2_node_frag, rb)
345#define frag_parent(frag) rb_entry(rb_parent(&(frag)->rb), struct jffs2_node_frag, rb)
346#define frag_left(frag) rb_entry((frag)->rb.rb_left, struct jffs2_node_frag, rb)
347#define frag_right(frag) rb_entry((frag)->rb.rb_right, struct jffs2_node_frag, rb)
348#define frag_erase(frag, list) rb_erase(&frag->rb, list);
349
350#define tn_next(tn) rb_entry(rb_next(&(tn)->rb), struct jffs2_tmp_dnode_info, rb)
351#define tn_prev(tn) rb_entry(rb_prev(&(tn)->rb), struct jffs2_tmp_dnode_info, rb)
352#define tn_parent(tn) rb_entry(rb_parent(&(tn)->rb), struct jffs2_tmp_dnode_info, rb)
353#define tn_left(tn) rb_entry((tn)->rb.rb_left, struct jffs2_tmp_dnode_info, rb)
354#define tn_right(tn) rb_entry((tn)->rb.rb_right, struct jffs2_tmp_dnode_info, rb)
355#define tn_erase(tn, list) rb_erase(&tn->rb, list);
356#define tn_last(list) rb_entry(rb_last(list), struct jffs2_tmp_dnode_info, rb)
357#define tn_first(list) rb_entry(rb_first(list), struct jffs2_tmp_dnode_info, rb)
358
359
360void jffs2_add_fd_to_list(struct jffs2_sb_info *c, struct jffs2_full_dirent *new, struct jffs2_full_dirent **list);
361void jffs2_set_inocache_state(struct jffs2_sb_info *c, struct jffs2_inode_cache *ic, int state);
362struct jffs2_inode_cache *jffs2_get_ino_cache(struct jffs2_sb_info *c, uint32_t ino);
363void jffs2_add_ino_cache (struct jffs2_sb_info *c, struct jffs2_inode_cache *new);
364void jffs2_del_ino_cache(struct jffs2_sb_info *c, struct jffs2_inode_cache *old);
365void jffs2_free_ino_caches(struct jffs2_sb_info *c);
366void jffs2_free_raw_node_refs(struct jffs2_sb_info *c);
367struct jffs2_node_frag *jffs2_lookup_node_frag(struct rb_root *fragtree, uint32_t offset);
368void jffs2_kill_fragtree(struct rb_root *root, struct jffs2_sb_info *c_delete);
369int jffs2_add_full_dnode_to_inode(struct jffs2_sb_info *c, struct jffs2_inode_info *f, struct jffs2_full_dnode *fn);
370uint32_t jffs2_truncate_fragtree (struct jffs2_sb_info *c, struct rb_root *list, uint32_t size);
371struct jffs2_raw_node_ref *jffs2_link_node_ref(struct jffs2_sb_info *c,
372 struct jffs2_eraseblock *jeb,
373 uint32_t ofs, uint32_t len,
374 struct jffs2_inode_cache *ic);
375extern uint32_t __jffs2_ref_totlen(struct jffs2_sb_info *c,
376 struct jffs2_eraseblock *jeb,
377 struct jffs2_raw_node_ref *ref);
378
379
380int jffs2_thread_should_wake(struct jffs2_sb_info *c);
381int jffs2_reserve_space(struct jffs2_sb_info *c, uint32_t minsize,
382 uint32_t *len, int prio, uint32_t sumsize);
383int jffs2_reserve_space_gc(struct jffs2_sb_info *c, uint32_t minsize,
384 uint32_t *len, uint32_t sumsize);
385struct jffs2_raw_node_ref *jffs2_add_physical_node_ref(struct jffs2_sb_info *c,
386 uint32_t ofs, uint32_t len,
387 struct jffs2_inode_cache *ic);
388void jffs2_complete_reservation(struct jffs2_sb_info *c);
389void jffs2_mark_node_obsolete(struct jffs2_sb_info *c, struct jffs2_raw_node_ref *raw);
390
391
392int jffs2_do_new_inode(struct jffs2_sb_info *c, struct jffs2_inode_info *f, uint32_t mode, struct jffs2_raw_inode *ri);
393
394struct jffs2_full_dnode *jffs2_write_dnode(struct jffs2_sb_info *c, struct jffs2_inode_info *f,
395 struct jffs2_raw_inode *ri, const unsigned char *data,
396 uint32_t datalen, int alloc_mode);
397struct jffs2_full_dirent *jffs2_write_dirent(struct jffs2_sb_info *c, struct jffs2_inode_info *f,
398 struct jffs2_raw_dirent *rd, const unsigned char *name,
399 uint32_t namelen, int alloc_mode);
400int jffs2_write_inode_range(struct jffs2_sb_info *c, struct jffs2_inode_info *f,
401 struct jffs2_raw_inode *ri, unsigned char *buf,
402 uint32_t offset, uint32_t writelen, uint32_t *retlen);
403int jffs2_do_create(struct jffs2_sb_info *c, struct jffs2_inode_info *dir_f, struct jffs2_inode_info *f,
404 struct jffs2_raw_inode *ri, const char *name, int namelen);
405int jffs2_do_unlink(struct jffs2_sb_info *c, struct jffs2_inode_info *dir_f, const char *name,
406 int namelen, struct jffs2_inode_info *dead_f, uint32_t time);
407int jffs2_do_link(struct jffs2_sb_info *c, struct jffs2_inode_info *dir_f, uint32_t ino,
408 uint8_t type, const char *name, int namelen, uint32_t time);
409
410
411
412int jffs2_do_read_inode(struct jffs2_sb_info *c, struct jffs2_inode_info *f,
413 uint32_t ino, struct jffs2_raw_inode *latest_node);
414int jffs2_do_crccheck_inode(struct jffs2_sb_info *c, struct jffs2_inode_cache *ic);
415void jffs2_do_clear_inode(struct jffs2_sb_info *c, struct jffs2_inode_info *f);
416
417
418int jffs2_create_slab_caches(void);
419void jffs2_destroy_slab_caches(void);
420
421struct jffs2_full_dirent *jffs2_alloc_full_dirent(int namesize);
422void jffs2_free_full_dirent(struct jffs2_full_dirent *);
423struct jffs2_full_dnode *jffs2_alloc_full_dnode(void);
424void jffs2_free_full_dnode(struct jffs2_full_dnode *);
425struct jffs2_raw_dirent *jffs2_alloc_raw_dirent(void);
426void jffs2_free_raw_dirent(struct jffs2_raw_dirent *);
427struct jffs2_raw_inode *jffs2_alloc_raw_inode(void);
428void jffs2_free_raw_inode(struct jffs2_raw_inode *);
429struct jffs2_tmp_dnode_info *jffs2_alloc_tmp_dnode_info(void);
430void jffs2_free_tmp_dnode_info(struct jffs2_tmp_dnode_info *);
431int jffs2_prealloc_raw_node_refs(struct jffs2_sb_info *c,
432 struct jffs2_eraseblock *jeb, int nr);
433void jffs2_free_refblock(struct jffs2_raw_node_ref *);
434struct jffs2_node_frag *jffs2_alloc_node_frag(void);
435void jffs2_free_node_frag(struct jffs2_node_frag *);
436struct jffs2_inode_cache *jffs2_alloc_inode_cache(void);
437void jffs2_free_inode_cache(struct jffs2_inode_cache *);
438#ifdef CONFIG_JFFS2_FS_XATTR
439struct jffs2_xattr_datum *jffs2_alloc_xattr_datum(void);
440void jffs2_free_xattr_datum(struct jffs2_xattr_datum *);
441struct jffs2_xattr_ref *jffs2_alloc_xattr_ref(void);
442void jffs2_free_xattr_ref(struct jffs2_xattr_ref *);
443#endif
444
445
446int jffs2_garbage_collect_pass(struct jffs2_sb_info *c);
447
448
449int jffs2_read_dnode(struct jffs2_sb_info *c, struct jffs2_inode_info *f,
450 struct jffs2_full_dnode *fd, unsigned char *buf,
451 int ofs, int len);
452int jffs2_read_inode_range(struct jffs2_sb_info *c, struct jffs2_inode_info *f,
453 unsigned char *buf, uint32_t offset, uint32_t len);
454char *jffs2_getlink(struct jffs2_sb_info *c, struct jffs2_inode_info *f);
455
456
457int jffs2_scan_medium(struct jffs2_sb_info *c);
458void jffs2_rotate_lists(struct jffs2_sb_info *c);
459struct jffs2_inode_cache *jffs2_scan_make_ino_cache(struct jffs2_sb_info *c, uint32_t ino);
460int jffs2_scan_classify_jeb(struct jffs2_sb_info *c, struct jffs2_eraseblock *jeb);
461int jffs2_scan_dirty_space(struct jffs2_sb_info *c, struct jffs2_eraseblock *jeb, uint32_t size);
462
463
464int jffs2_do_mount_fs(struct jffs2_sb_info *c);
465
466
467void jffs2_erase_pending_blocks(struct jffs2_sb_info *c, int count);
468void jffs2_free_jeb_node_refs(struct jffs2_sb_info *c, struct jffs2_eraseblock *jeb);
469
470#ifdef CONFIG_JFFS2_FS_WRITEBUFFER
471
472int jffs2_flush_wbuf_gc(struct jffs2_sb_info *c, uint32_t ino);
473int jffs2_flush_wbuf_pad(struct jffs2_sb_info *c);
474int jffs2_check_nand_cleanmarker(struct jffs2_sb_info *c, struct jffs2_eraseblock *jeb);
475int jffs2_write_nand_cleanmarker(struct jffs2_sb_info *c, struct jffs2_eraseblock *jeb);
476#endif
477
478#include "debug.h"
479
480#endif
481