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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 "os-linux.h"
28#endif
29
30#define JFFS2_NATIVE_ENDIAN
31
32
33
34
35#if defined(JFFS2_NATIVE_ENDIAN)
36#define cpu_to_je16(x) ((jint16_t){x})
37#define cpu_to_je32(x) ((jint32_t){x})
38#define cpu_to_jemode(x) ((jmode_t){os_to_jffs2_mode(x)})
39
40#define constant_cpu_to_je16(x) ((jint16_t){x})
41#define constant_cpu_to_je32(x) ((jint32_t){x})
42
43#define je16_to_cpu(x) ((x).v16)
44#define je32_to_cpu(x) ((x).v32)
45#define jemode_to_cpu(x) (jffs2_to_os_mode((x).m))
46#elif defined(JFFS2_BIG_ENDIAN)
47#define cpu_to_je16(x) ((jint16_t){cpu_to_be16(x)})
48#define cpu_to_je32(x) ((jint32_t){cpu_to_be32(x)})
49#define cpu_to_jemode(x) ((jmode_t){cpu_to_be32(os_to_jffs2_mode(x))})
50
51#define constant_cpu_to_je16(x) ((jint16_t){__constant_cpu_to_be16(x)})
52#define constant_cpu_to_je32(x) ((jint32_t){__constant_cpu_to_be32(x)})
53
54#define je16_to_cpu(x) (be16_to_cpu(x.v16))
55#define je32_to_cpu(x) (be32_to_cpu(x.v32))
56#define jemode_to_cpu(x) (be32_to_cpu(jffs2_to_os_mode((x).m)))
57#elif defined(JFFS2_LITTLE_ENDIAN)
58#define cpu_to_je16(x) ((jint16_t){cpu_to_le16(x)})
59#define cpu_to_je32(x) ((jint32_t){cpu_to_le32(x)})
60#define cpu_to_jemode(x) ((jmode_t){cpu_to_le32(os_to_jffs2_mode(x))})
61
62#define constant_cpu_to_je16(x) ((jint16_t){__constant_cpu_to_le16(x)})
63#define constant_cpu_to_je32(x) ((jint32_t){__constant_cpu_to_le32(x)})
64
65#define je16_to_cpu(x) (le16_to_cpu(x.v16))
66#define je32_to_cpu(x) (le32_to_cpu(x.v32))
67#define jemode_to_cpu(x) (le32_to_cpu(jffs2_to_os_mode((x).m)))
68#else
69#error wibble
70#endif
71
72
73#define JFFS2_MIN_NODE_HEADER sizeof(struct jffs2_raw_dirent)
74
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80
81
82struct jffs2_raw_node_ref
83{
84 struct jffs2_raw_node_ref *next_in_ino;
85
86
87
88 uint32_t flash_offset;
89#undef TEST_TOTLEN
90#ifdef TEST_TOTLEN
91 uint32_t __totlen;
92#endif
93};
94
95#define REF_LINK_NODE ((int32_t)-1)
96#define REF_EMPTY_NODE ((int32_t)-2)
97
98
99#define REFS_PER_BLOCK ((255/sizeof(struct jffs2_raw_node_ref))-1)
100
101static inline struct jffs2_raw_node_ref *ref_next(struct jffs2_raw_node_ref *ref)
102{
103 ref++;
104
105
106 if (ref->flash_offset == REF_LINK_NODE) {
107 ref = ref->next_in_ino;
108 if (!ref)
109 return ref;
110 }
111
112
113 if (ref->flash_offset == REF_EMPTY_NODE)
114 return NULL;
115
116 return ref;
117}
118
119static inline struct jffs2_inode_cache *jffs2_raw_ref_to_ic(struct jffs2_raw_node_ref *raw)
120{
121 while(raw->next_in_ino)
122 raw = raw->next_in_ino;
123
124
125
126 return ((struct jffs2_inode_cache *)raw);
127}
128
129
130
131
132#define REF_UNCHECKED 0
133#define REF_OBSOLETE 1
134#define REF_PRISTINE 2
135#define REF_NORMAL 3
136#define ref_flags(ref) ((ref)->flash_offset & 3)
137#define ref_offset(ref) ((ref)->flash_offset & ~3)
138#define ref_obsolete(ref) (((ref)->flash_offset & 3) == REF_OBSOLETE)
139#define mark_ref_normal(ref) do { (ref)->flash_offset = ref_offset(ref) | REF_NORMAL; } while(0)
140
141
142
143
144#define dirent_node_state(rd) ( (je32_to_cpu((rd)->ino)?REF_PRISTINE:REF_NORMAL) )
145
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156
157
158struct jffs2_inode_cache {
159
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162
163 struct jffs2_full_dirent *scan_dents;
164
165
166
167 struct jffs2_raw_node_ref *nodes;
168 uint8_t class;
169
170
171
172 uint8_t flags;
173 uint16_t state;
174 uint32_t ino;
175 struct jffs2_inode_cache *next;
176#ifdef CONFIG_JFFS2_FS_XATTR
177 struct jffs2_xattr_ref *xref;
178#endif
179 uint32_t pino_nlink;
180
181
182
183};
184
185
186
187
188#define INO_STATE_UNCHECKED 0
189#define INO_STATE_CHECKING 1
190#define INO_STATE_PRESENT 2
191#define INO_STATE_CHECKEDABSENT 3
192#define INO_STATE_GC 4
193#define INO_STATE_READING 5
194#define INO_STATE_CLEARING 6
195
196#define INO_FLAGS_XATTR_CHECKED 0x01
197#define INO_FLAGS_IS_DIR 0x02
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_MIN 128
204#define INOCACHE_HASHSIZE_MAX 1024
205
206#define write_ofs(c) ((c)->nextblock->offset + (c)->sector_size - (c)->nextblock->free_size)
207
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211
212
213struct jffs2_full_dnode
214{
215 struct jffs2_raw_node_ref *raw;
216 uint32_t ofs;
217 uint32_t size;
218 uint32_t frags;
219
220
221};
222
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225
226
227
228struct jffs2_tmp_dnode_info
229{
230 struct rb_node rb;
231 struct jffs2_full_dnode *fn;
232 uint32_t version;
233 uint32_t data_crc;
234 uint32_t partial_crc;
235 uint32_t csize;
236 uint16_t overlapped;
237};
238
239
240struct jffs2_readinode_info
241{
242 struct rb_root tn_root;
243 struct jffs2_tmp_dnode_info *mdata_tn;
244 uint32_t highest_version;
245 uint32_t latest_mctime;
246 uint32_t mctime_ver;
247 struct jffs2_full_dirent *fds;
248 struct jffs2_raw_node_ref *latest_ref;
249};
250
251struct jffs2_full_dirent
252{
253 union {
254 struct jffs2_raw_node_ref *raw;
255 struct jffs2_inode_cache *ic;
256 };
257 struct jffs2_full_dirent *next;
258 uint32_t version;
259 uint32_t ino;
260 unsigned int nhash;
261 unsigned char type;
262 unsigned char name[0];
263};
264
265
266
267
268
269struct jffs2_node_frag
270{
271 struct rb_node rb;
272 struct jffs2_full_dnode *node;
273 uint32_t size;
274 uint32_t ofs;
275};
276
277struct jffs2_eraseblock
278{
279 struct list_head list;
280 int bad_count;
281 uint32_t offset;
282
283 uint32_t unchecked_size;
284 uint32_t used_size;
285 uint32_t dirty_size;
286 uint32_t wasted_size;
287 uint32_t free_size;
288
289 uint32_t allocated_refs;
290 struct jffs2_raw_node_ref *first_node;
291 struct jffs2_raw_node_ref *last_node;
292
293 struct jffs2_raw_node_ref *gc_node;
294};
295
296static inline int jffs2_blocks_use_vmalloc(struct jffs2_sb_info *c)
297{
298 return ((c->flash_size / c->sector_size) * sizeof (struct jffs2_eraseblock)) > (128 * 1024);
299}
300
301#define ref_totlen(a, b, c) __jffs2_ref_totlen((a), (b), (c))
302
303#define ALLOC_NORMAL 0
304#define ALLOC_DELETION 1
305#define ALLOC_GC 2
306#define ALLOC_NORETRY 3
307
308
309#define VERYDIRTY(c, size) ((size) >= ((c)->sector_size / 2))
310
311
312#define ISDIRTY(size) ((size) > sizeof (struct jffs2_raw_inode) + JFFS2_MIN_DATA_LEN)
313
314#define PAD(x) (((x)+3)&~3)
315
316static inline int jffs2_encode_dev(union jffs2_device_node *jdev, dev_t rdev)
317{
318 if (old_valid_dev(rdev)) {
319 jdev->old_id = cpu_to_je16(old_encode_dev(rdev));
320 return sizeof(jdev->old_id);
321 } else {
322 jdev->new_id = cpu_to_je32(new_encode_dev(rdev));
323 return sizeof(jdev->new_id);
324 }
325}
326
327static inline struct jffs2_node_frag *frag_first(struct rb_root *root)
328{
329 struct rb_node *node = rb_first(root);
330
331 if (!node)
332 return NULL;
333
334 return rb_entry(node, struct jffs2_node_frag, rb);
335}
336
337static inline struct jffs2_node_frag *frag_last(struct rb_root *root)
338{
339 struct rb_node *node = rb_last(root);
340
341 if (!node)
342 return NULL;
343
344 return rb_entry(node, struct jffs2_node_frag, rb);
345}
346
347#define frag_next(frag) rb_entry(rb_next(&(frag)->rb), struct jffs2_node_frag, rb)
348#define frag_prev(frag) rb_entry(rb_prev(&(frag)->rb), struct jffs2_node_frag, rb)
349#define frag_parent(frag) rb_entry(rb_parent(&(frag)->rb), struct jffs2_node_frag, rb)
350#define frag_left(frag) rb_entry((frag)->rb.rb_left, struct jffs2_node_frag, rb)
351#define frag_right(frag) rb_entry((frag)->rb.rb_right, struct jffs2_node_frag, rb)
352#define frag_erase(frag, list) rb_erase(&frag->rb, list);
353
354#define tn_next(tn) rb_entry(rb_next(&(tn)->rb), struct jffs2_tmp_dnode_info, rb)
355#define tn_prev(tn) rb_entry(rb_prev(&(tn)->rb), struct jffs2_tmp_dnode_info, rb)
356#define tn_parent(tn) rb_entry(rb_parent(&(tn)->rb), struct jffs2_tmp_dnode_info, rb)
357#define tn_left(tn) rb_entry((tn)->rb.rb_left, struct jffs2_tmp_dnode_info, rb)
358#define tn_right(tn) rb_entry((tn)->rb.rb_right, struct jffs2_tmp_dnode_info, rb)
359#define tn_erase(tn, list) rb_erase(&tn->rb, list);
360#define tn_last(list) rb_entry(rb_last(list), struct jffs2_tmp_dnode_info, rb)
361#define tn_first(list) rb_entry(rb_first(list), struct jffs2_tmp_dnode_info, rb)
362
363
364void jffs2_add_fd_to_list(struct jffs2_sb_info *c, struct jffs2_full_dirent *new, struct jffs2_full_dirent **list);
365void jffs2_set_inocache_state(struct jffs2_sb_info *c, struct jffs2_inode_cache *ic, int state);
366struct jffs2_inode_cache *jffs2_get_ino_cache(struct jffs2_sb_info *c, uint32_t ino);
367void jffs2_add_ino_cache (struct jffs2_sb_info *c, struct jffs2_inode_cache *new);
368void jffs2_del_ino_cache(struct jffs2_sb_info *c, struct jffs2_inode_cache *old);
369void jffs2_free_ino_caches(struct jffs2_sb_info *c);
370void jffs2_free_raw_node_refs(struct jffs2_sb_info *c);
371struct jffs2_node_frag *jffs2_lookup_node_frag(struct rb_root *fragtree, uint32_t offset);
372void jffs2_kill_fragtree(struct rb_root *root, struct jffs2_sb_info *c_delete);
373int jffs2_add_full_dnode_to_inode(struct jffs2_sb_info *c, struct jffs2_inode_info *f, struct jffs2_full_dnode *fn);
374uint32_t jffs2_truncate_fragtree (struct jffs2_sb_info *c, struct rb_root *list, uint32_t size);
375struct jffs2_raw_node_ref *jffs2_link_node_ref(struct jffs2_sb_info *c,
376 struct jffs2_eraseblock *jeb,
377 uint32_t ofs, uint32_t len,
378 struct jffs2_inode_cache *ic);
379extern uint32_t __jffs2_ref_totlen(struct jffs2_sb_info *c,
380 struct jffs2_eraseblock *jeb,
381 struct jffs2_raw_node_ref *ref);
382
383
384int jffs2_thread_should_wake(struct jffs2_sb_info *c);
385int jffs2_reserve_space(struct jffs2_sb_info *c, uint32_t minsize,
386 uint32_t *len, int prio, uint32_t sumsize);
387int jffs2_reserve_space_gc(struct jffs2_sb_info *c, uint32_t minsize,
388 uint32_t *len, uint32_t sumsize);
389struct jffs2_raw_node_ref *jffs2_add_physical_node_ref(struct jffs2_sb_info *c,
390 uint32_t ofs, uint32_t len,
391 struct jffs2_inode_cache *ic);
392void jffs2_complete_reservation(struct jffs2_sb_info *c);
393void jffs2_mark_node_obsolete(struct jffs2_sb_info *c, struct jffs2_raw_node_ref *raw);
394
395
396int jffs2_do_new_inode(struct jffs2_sb_info *c, struct jffs2_inode_info *f, uint32_t mode, struct jffs2_raw_inode *ri);
397
398struct jffs2_full_dnode *jffs2_write_dnode(struct jffs2_sb_info *c, struct jffs2_inode_info *f,
399 struct jffs2_raw_inode *ri, const unsigned char *data,
400 uint32_t datalen, int alloc_mode);
401struct jffs2_full_dirent *jffs2_write_dirent(struct jffs2_sb_info *c, struct jffs2_inode_info *f,
402 struct jffs2_raw_dirent *rd, const unsigned char *name,
403 uint32_t namelen, int alloc_mode);
404int jffs2_write_inode_range(struct jffs2_sb_info *c, struct jffs2_inode_info *f,
405 struct jffs2_raw_inode *ri, unsigned char *buf,
406 uint32_t offset, uint32_t writelen, uint32_t *retlen);
407int jffs2_do_create(struct jffs2_sb_info *c, struct jffs2_inode_info *dir_f, struct jffs2_inode_info *f,
408 struct jffs2_raw_inode *ri, const struct qstr *qstr);
409int jffs2_do_unlink(struct jffs2_sb_info *c, struct jffs2_inode_info *dir_f, const char *name,
410 int namelen, struct jffs2_inode_info *dead_f, uint32_t time);
411int jffs2_do_link(struct jffs2_sb_info *c, struct jffs2_inode_info *dir_f, uint32_t ino,
412 uint8_t type, const char *name, int namelen, uint32_t time);
413
414
415
416int jffs2_do_read_inode(struct jffs2_sb_info *c, struct jffs2_inode_info *f,
417 uint32_t ino, struct jffs2_raw_inode *latest_node);
418int jffs2_do_crccheck_inode(struct jffs2_sb_info *c, struct jffs2_inode_cache *ic);
419void jffs2_do_clear_inode(struct jffs2_sb_info *c, struct jffs2_inode_info *f);
420
421
422int jffs2_create_slab_caches(void);
423void jffs2_destroy_slab_caches(void);
424
425struct jffs2_full_dirent *jffs2_alloc_full_dirent(int namesize);
426void jffs2_free_full_dirent(struct jffs2_full_dirent *);
427struct jffs2_full_dnode *jffs2_alloc_full_dnode(void);
428void jffs2_free_full_dnode(struct jffs2_full_dnode *);
429struct jffs2_raw_dirent *jffs2_alloc_raw_dirent(void);
430void jffs2_free_raw_dirent(struct jffs2_raw_dirent *);
431struct jffs2_raw_inode *jffs2_alloc_raw_inode(void);
432void jffs2_free_raw_inode(struct jffs2_raw_inode *);
433struct jffs2_tmp_dnode_info *jffs2_alloc_tmp_dnode_info(void);
434void jffs2_free_tmp_dnode_info(struct jffs2_tmp_dnode_info *);
435int jffs2_prealloc_raw_node_refs(struct jffs2_sb_info *c,
436 struct jffs2_eraseblock *jeb, int nr);
437void jffs2_free_refblock(struct jffs2_raw_node_ref *);
438struct jffs2_node_frag *jffs2_alloc_node_frag(void);
439void jffs2_free_node_frag(struct jffs2_node_frag *);
440struct jffs2_inode_cache *jffs2_alloc_inode_cache(void);
441void jffs2_free_inode_cache(struct jffs2_inode_cache *);
442#ifdef CONFIG_JFFS2_FS_XATTR
443struct jffs2_xattr_datum *jffs2_alloc_xattr_datum(void);
444void jffs2_free_xattr_datum(struct jffs2_xattr_datum *);
445struct jffs2_xattr_ref *jffs2_alloc_xattr_ref(void);
446void jffs2_free_xattr_ref(struct jffs2_xattr_ref *);
447#endif
448
449
450int jffs2_garbage_collect_pass(struct jffs2_sb_info *c);
451
452
453int jffs2_read_dnode(struct jffs2_sb_info *c, struct jffs2_inode_info *f,
454 struct jffs2_full_dnode *fd, unsigned char *buf,
455 int ofs, int len);
456int jffs2_read_inode_range(struct jffs2_sb_info *c, struct jffs2_inode_info *f,
457 unsigned char *buf, uint32_t offset, uint32_t len);
458char *jffs2_getlink(struct jffs2_sb_info *c, struct jffs2_inode_info *f);
459
460
461int jffs2_scan_medium(struct jffs2_sb_info *c);
462void jffs2_rotate_lists(struct jffs2_sb_info *c);
463struct jffs2_inode_cache *jffs2_scan_make_ino_cache(struct jffs2_sb_info *c, uint32_t ino);
464int jffs2_scan_classify_jeb(struct jffs2_sb_info *c, struct jffs2_eraseblock *jeb);
465int jffs2_scan_dirty_space(struct jffs2_sb_info *c, struct jffs2_eraseblock *jeb, uint32_t size);
466
467
468int jffs2_do_mount_fs(struct jffs2_sb_info *c);
469
470
471int jffs2_erase_pending_blocks(struct jffs2_sb_info *c, int count);
472void jffs2_free_jeb_node_refs(struct jffs2_sb_info *c, struct jffs2_eraseblock *jeb);
473
474#ifdef CONFIG_JFFS2_FS_WRITEBUFFER
475
476int jffs2_flush_wbuf_gc(struct jffs2_sb_info *c, uint32_t ino);
477int jffs2_flush_wbuf_pad(struct jffs2_sb_info *c);
478int jffs2_check_nand_cleanmarker(struct jffs2_sb_info *c, struct jffs2_eraseblock *jeb);
479int jffs2_write_nand_cleanmarker(struct jffs2_sb_info *c, struct jffs2_eraseblock *jeb);
480#endif
481
482#include "debug.h"
483
484#endif
485