1 | /* |
---|
2 | * JFFS2 -- Journalling Flash File System, Version 2. |
---|
3 | * |
---|
4 | * Copyright © 2001-2007 Red Hat, Inc. |
---|
5 | * |
---|
6 | * Created by David Woodhouse <dwmw2@infradead.org> |
---|
7 | * |
---|
8 | * For licensing information, see the file 'LICENCE' in this directory. |
---|
9 | * |
---|
10 | */ |
---|
11 | |
---|
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 __rtems__ |
---|
25 | #include "os-rtems.h" |
---|
26 | #else |
---|
27 | #include "os-linux.h" |
---|
28 | #endif |
---|
29 | |
---|
30 | #define JFFS2_NATIVE_ENDIAN |
---|
31 | |
---|
32 | /* Note we handle mode bits conversion from JFFS2 (i.e. Linux) to/from |
---|
33 | whatever OS we're actually running on here too. */ |
---|
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 | /* The minimal node header size */ |
---|
73 | #define JFFS2_MIN_NODE_HEADER sizeof(struct jffs2_raw_dirent) |
---|
74 | |
---|
75 | /* |
---|
76 | This is all we need to keep in-core for each raw node during normal |
---|
77 | operation. As and when we do read_inode on a particular inode, we can |
---|
78 | scan the nodes which are listed for it and build up a proper map of |
---|
79 | which nodes are currently valid. JFFSv1 always used to keep that whole |
---|
80 | map in core for each inode. |
---|
81 | */ |
---|
82 | struct jffs2_raw_node_ref |
---|
83 | { |
---|
84 | struct jffs2_raw_node_ref *next_in_ino; /* Points to the next raw_node_ref |
---|
85 | for this object. If this _is_ the last, it points to the inode_cache, |
---|
86 | xattr_ref or xattr_datum instead. The common part of those structures |
---|
87 | has NULL in the first word. See jffs2_raw_ref_to_ic() below */ |
---|
88 | uint32_t flash_offset; |
---|
89 | #undef TEST_TOTLEN |
---|
90 | #ifdef TEST_TOTLEN |
---|
91 | uint32_t __totlen; /* This may die; use ref_totlen(c, jeb, ) below */ |
---|
92 | #endif |
---|
93 | }; |
---|
94 | |
---|
95 | #define REF_LINK_NODE ((int32_t)-1) |
---|
96 | #define REF_EMPTY_NODE ((int32_t)-2) |
---|
97 | |
---|
98 | /* Use blocks of about 256 bytes */ |
---|
99 | #define REFS_PER_BLOCK ((255/sizeof(struct jffs2_raw_node_ref))-1) |
---|
100 | |
---|
101 | static inline struct jffs2_raw_node_ref *ref_next(struct jffs2_raw_node_ref *ref) |
---|
102 | { |
---|
103 | ref++; |
---|
104 | |
---|
105 | /* Link to another block of refs */ |
---|
106 | if (ref->flash_offset == REF_LINK_NODE) { |
---|
107 | ref = ref->next_in_ino; |
---|
108 | if (!ref) |
---|
109 | return ref; |
---|
110 | } |
---|
111 | |
---|
112 | /* End of chain */ |
---|
113 | if (ref->flash_offset == REF_EMPTY_NODE) |
---|
114 | return NULL; |
---|
115 | |
---|
116 | return ref; |
---|
117 | } |
---|
118 | |
---|
119 | static 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 | /* NB. This can be a jffs2_xattr_datum or jffs2_xattr_ref and |
---|
125 | not actually a jffs2_inode_cache. Check ->class */ |
---|
126 | return ((struct jffs2_inode_cache *)raw); |
---|
127 | } |
---|
128 | |
---|
129 | /* flash_offset & 3 always has to be zero, because nodes are |
---|
130 | always aligned at 4 bytes. So we have a couple of extra bits |
---|
131 | to play with, which indicate the node's status; see below: */ |
---|
132 | #define REF_UNCHECKED 0 /* We haven't yet checked the CRC or built its inode */ |
---|
133 | #define REF_OBSOLETE 1 /* Obsolete, can be completely ignored */ |
---|
134 | #define REF_PRISTINE 2 /* Completely clean. GC without looking */ |
---|
135 | #define REF_NORMAL 3 /* Possibly overlapped. Read the page and write again on GC */ |
---|
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 | /* Dirent nodes should be REF_PRISTINE only if they are not a deletion |
---|
142 | dirent. Deletion dirents should be REF_NORMAL so that GC gets to |
---|
143 | throw them away when appropriate */ |
---|
144 | #define dirent_node_state(rd) ( (je32_to_cpu((rd)->ino)?REF_PRISTINE:REF_NORMAL) ) |
---|
145 | |
---|
146 | /* NB: REF_PRISTINE for an inode-less node (ref->next_in_ino == NULL) indicates |
---|
147 | it is an unknown node of type JFFS2_NODETYPE_RWCOMPAT_COPY, so it'll get |
---|
148 | copied. If you need to do anything different to GC inode-less nodes, then |
---|
149 | you need to modify gc.c accordingly. */ |
---|
150 | |
---|
151 | /* For each inode in the filesystem, we need to keep a record of |
---|
152 | nlink, because it would be a PITA to scan the whole directory tree |
---|
153 | at read_inode() time to calculate it, and to keep sufficient information |
---|
154 | in the raw_node_ref (basically both parent and child inode number for |
---|
155 | dirent nodes) would take more space than this does. We also keep |
---|
156 | a pointer to the first physical node which is part of this inode, too. |
---|
157 | */ |
---|
158 | struct jffs2_inode_cache { |
---|
159 | /* First part of structure is shared with other objects which |
---|
160 | can terminate the raw node refs' next_in_ino list -- which |
---|
161 | currently struct jffs2_xattr_datum and struct jffs2_xattr_ref. */ |
---|
162 | |
---|
163 | struct jffs2_full_dirent *scan_dents; /* Used during scan to hold |
---|
164 | temporary lists of dirents, and later must be set to |
---|
165 | NULL to mark the end of the raw_node_ref->next_in_ino |
---|
166 | chain. */ |
---|
167 | struct jffs2_raw_node_ref *nodes; |
---|
168 | uint8_t class; /* It's used for identification */ |
---|
169 | |
---|
170 | /* end of shared structure */ |
---|
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; /* Directories store parent inode |
---|
180 | here; other inodes store nlink. |
---|
181 | Zero always means that it's |
---|
182 | completely unlinked. */ |
---|
183 | }; |
---|
184 | |
---|
185 | /* Inode states for 'state' above. We need the 'GC' state to prevent |
---|
186 | someone from doing a read_inode() while we're moving a 'REF_PRISTINE' |
---|
187 | node without going through all the iget() nonsense */ |
---|
188 | #define INO_STATE_UNCHECKED 0 /* CRC checks not yet done */ |
---|
189 | #define INO_STATE_CHECKING 1 /* CRC checks in progress */ |
---|
190 | #define INO_STATE_PRESENT 2 /* In core */ |
---|
191 | #define INO_STATE_CHECKEDABSENT 3 /* Checked, cleared again */ |
---|
192 | #define INO_STATE_GC 4 /* GCing a 'pristine' node */ |
---|
193 | #define INO_STATE_READING 5 /* In read_inode() */ |
---|
194 | #define INO_STATE_CLEARING 6 /* In clear_inode() */ |
---|
195 | |
---|
196 | #define INO_FLAGS_XATTR_CHECKED 0x01 /* has no duplicate xattr_ref */ |
---|
197 | |
---|
198 | #define RAWNODE_CLASS_INODE_CACHE 0 |
---|
199 | #define RAWNODE_CLASS_XATTR_DATUM 1 |
---|
200 | #define RAWNODE_CLASS_XATTR_REF 2 |
---|
201 | |
---|
202 | #define INOCACHE_HASHSIZE_MIN 128 |
---|
203 | #define INOCACHE_HASHSIZE_MAX 1024 |
---|
204 | |
---|
205 | #define write_ofs(c) ((c)->nextblock->offset + (c)->sector_size - (c)->nextblock->free_size) |
---|
206 | |
---|
207 | /* |
---|
208 | Larger representation of a raw node, kept in-core only when the |
---|
209 | struct inode for this particular ino is instantiated. |
---|
210 | */ |
---|
211 | |
---|
212 | struct jffs2_full_dnode |
---|
213 | { |
---|
214 | struct jffs2_raw_node_ref *raw; |
---|
215 | uint32_t ofs; /* The offset to which the data of this node belongs */ |
---|
216 | uint32_t size; |
---|
217 | uint32_t frags; /* Number of fragments which currently refer |
---|
218 | to this node. When this reaches zero, |
---|
219 | the node is obsolete. */ |
---|
220 | }; |
---|
221 | |
---|
222 | /* |
---|
223 | Even larger representation of a raw node, kept in-core only while |
---|
224 | we're actually building up the original map of which nodes go where, |
---|
225 | in read_inode() |
---|
226 | */ |
---|
227 | struct 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 | uint32_t csize; |
---|
235 | uint16_t overlapped; |
---|
236 | }; |
---|
237 | |
---|
238 | /* Temporary data structure used during readinode. */ |
---|
239 | struct 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 | |
---|
250 | struct 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; /* == zero for unlink */ |
---|
256 | unsigned int nhash; |
---|
257 | unsigned char type; |
---|
258 | unsigned char name[0]; |
---|
259 | }; |
---|
260 | |
---|
261 | /* |
---|
262 | Fragments - used to build a map of which raw node to obtain |
---|
263 | data from for each part of the ino |
---|
264 | */ |
---|
265 | struct jffs2_node_frag |
---|
266 | { |
---|
267 | struct rb_node rb; |
---|
268 | struct jffs2_full_dnode *node; /* NULL for holes */ |
---|
269 | uint32_t size; |
---|
270 | uint32_t ofs; /* The offset to which this fragment belongs */ |
---|
271 | }; |
---|
272 | |
---|
273 | struct jffs2_eraseblock |
---|
274 | { |
---|
275 | struct list_head list; |
---|
276 | int bad_count; |
---|
277 | uint32_t offset; /* of this block in the MTD */ |
---|
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; /* Note that sector_size - free_size |
---|
284 | is the address of the first free space */ |
---|
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; /* Next node to be garbage collected */ |
---|
290 | }; |
---|
291 | |
---|
292 | static inline int jffs2_blocks_use_vmalloc(struct jffs2_sb_info *c) |
---|
293 | { |
---|
294 | return ((c->flash_size / c->sector_size) * sizeof (struct jffs2_eraseblock)) > (128L * 1024L); |
---|
295 | } |
---|
296 | |
---|
297 | #define ref_totlen(a, b, c) __jffs2_ref_totlen((a), (b), (c)) |
---|
298 | |
---|
299 | #define ALLOC_NORMAL 0 /* Normal allocation */ |
---|
300 | #define ALLOC_DELETION 1 /* Deletion node. Best to allow it */ |
---|
301 | #define ALLOC_GC 2 /* Space requested for GC. Give it or die */ |
---|
302 | #define ALLOC_NORETRY 3 /* For jffs2_write_dnode: On failure, return -EAGAIN instead of retrying */ |
---|
303 | |
---|
304 | /* How much dirty space before it goes on the very_dirty_list */ |
---|
305 | #define VERYDIRTY(c, size) ((size) >= ((c)->sector_size / 2)) |
---|
306 | |
---|
307 | /* check if dirty space is more than 255 Byte */ |
---|
308 | #define ISDIRTY(size) ((size) > sizeof (struct jffs2_raw_inode) + JFFS2_MIN_DATA_LEN) |
---|
309 | |
---|
310 | #define PAD(x) (((x)+3)&~3) |
---|
311 | |
---|
312 | #ifndef __rtems__ |
---|
313 | static inline int jffs2_encode_dev(union jffs2_device_node *jdev, dev_t rdev) |
---|
314 | { |
---|
315 | if (old_valid_dev(rdev)) { |
---|
316 | jdev->old_id = cpu_to_je16(old_encode_dev(rdev)); |
---|
317 | return sizeof(jdev->old_id); |
---|
318 | } else { |
---|
319 | jdev->new_id = cpu_to_je32(new_encode_dev(rdev)); |
---|
320 | return sizeof(jdev->new_id); |
---|
321 | } |
---|
322 | } |
---|
323 | #endif /* __rtems__ */ |
---|
324 | |
---|
325 | static inline struct jffs2_node_frag *frag_first(struct rb_root *root) |
---|
326 | { |
---|
327 | struct rb_node *node = rb_first(root); |
---|
328 | |
---|
329 | if (!node) |
---|
330 | return NULL; |
---|
331 | |
---|
332 | return rb_entry(node, struct jffs2_node_frag, rb); |
---|
333 | } |
---|
334 | |
---|
335 | static inline struct jffs2_node_frag *frag_last(struct rb_root *root) |
---|
336 | { |
---|
337 | struct rb_node *node = rb_last(root); |
---|
338 | |
---|
339 | if (!node) |
---|
340 | return NULL; |
---|
341 | |
---|
342 | return rb_entry(node, struct jffs2_node_frag, rb); |
---|
343 | } |
---|
344 | |
---|
345 | #define frag_next(frag) rb_entry(rb_next(&(frag)->rb), struct jffs2_node_frag, rb) |
---|
346 | #define frag_prev(frag) rb_entry(rb_prev(&(frag)->rb), struct jffs2_node_frag, rb) |
---|
347 | #define frag_parent(frag) rb_entry(rb_parent(&(frag)->rb), struct jffs2_node_frag, rb) |
---|
348 | #define frag_left(frag) rb_entry((frag)->rb.rb_left, struct jffs2_node_frag, rb) |
---|
349 | #define frag_right(frag) rb_entry((frag)->rb.rb_right, struct jffs2_node_frag, rb) |
---|
350 | #define frag_erase(frag, list) rb_erase(&frag->rb, list); |
---|
351 | |
---|
352 | #define tn_next(tn) rb_entry(rb_next(&(tn)->rb), struct jffs2_tmp_dnode_info, rb) |
---|
353 | #define tn_prev(tn) rb_entry(rb_prev(&(tn)->rb), struct jffs2_tmp_dnode_info, rb) |
---|
354 | #define tn_parent(tn) rb_entry(rb_parent(&(tn)->rb), struct jffs2_tmp_dnode_info, rb) |
---|
355 | #define tn_left(tn) rb_entry((tn)->rb.rb_left, struct jffs2_tmp_dnode_info, rb) |
---|
356 | #define tn_right(tn) rb_entry((tn)->rb.rb_right, struct jffs2_tmp_dnode_info, rb) |
---|
357 | #define tn_erase(tn, list) rb_erase(&tn->rb, list); |
---|
358 | #define tn_last(list) rb_entry(rb_last(list), struct jffs2_tmp_dnode_info, rb) |
---|
359 | #define tn_first(list) rb_entry(rb_first(list), struct jffs2_tmp_dnode_info, rb) |
---|
360 | |
---|
361 | /* nodelist.c */ |
---|
362 | void jffs2_add_fd_to_list(struct jffs2_sb_info *c, struct jffs2_full_dirent *new, struct jffs2_full_dirent **list); |
---|
363 | void jffs2_set_inocache_state(struct jffs2_sb_info *c, struct jffs2_inode_cache *ic, int state); |
---|
364 | struct jffs2_inode_cache *jffs2_get_ino_cache(struct jffs2_sb_info *c, uint32_t ino); |
---|
365 | void jffs2_add_ino_cache (struct jffs2_sb_info *c, struct jffs2_inode_cache *new); |
---|
366 | void jffs2_del_ino_cache(struct jffs2_sb_info *c, struct jffs2_inode_cache *old); |
---|
367 | void jffs2_free_ino_caches(struct jffs2_sb_info *c); |
---|
368 | void jffs2_free_raw_node_refs(struct jffs2_sb_info *c); |
---|
369 | struct jffs2_node_frag *jffs2_lookup_node_frag(struct rb_root *fragtree, uint32_t offset); |
---|
370 | void jffs2_kill_fragtree(struct rb_root *root, struct jffs2_sb_info *c_delete); |
---|
371 | int jffs2_add_full_dnode_to_inode(struct jffs2_sb_info *c, struct jffs2_inode_info *f, struct jffs2_full_dnode *fn); |
---|
372 | uint32_t jffs2_truncate_fragtree (struct jffs2_sb_info *c, struct rb_root *list, uint32_t size); |
---|
373 | struct jffs2_raw_node_ref *jffs2_link_node_ref(struct jffs2_sb_info *c, |
---|
374 | struct jffs2_eraseblock *jeb, |
---|
375 | uint32_t ofs, uint32_t len, |
---|
376 | struct jffs2_inode_cache *ic); |
---|
377 | extern uint32_t __jffs2_ref_totlen(struct jffs2_sb_info *c, |
---|
378 | struct jffs2_eraseblock *jeb, |
---|
379 | struct jffs2_raw_node_ref *ref); |
---|
380 | |
---|
381 | /* nodemgmt.c */ |
---|
382 | int jffs2_thread_should_wake(struct jffs2_sb_info *c); |
---|
383 | int jffs2_reserve_space(struct jffs2_sb_info *c, uint32_t minsize, |
---|
384 | uint32_t *len, int prio, uint32_t sumsize); |
---|
385 | int jffs2_reserve_space_gc(struct jffs2_sb_info *c, uint32_t minsize, |
---|
386 | uint32_t *len, uint32_t sumsize); |
---|
387 | struct jffs2_raw_node_ref *jffs2_add_physical_node_ref(struct jffs2_sb_info *c, |
---|
388 | uint32_t ofs, uint32_t len, |
---|
389 | struct jffs2_inode_cache *ic); |
---|
390 | void jffs2_complete_reservation(struct jffs2_sb_info *c); |
---|
391 | void jffs2_mark_node_obsolete(struct jffs2_sb_info *c, struct jffs2_raw_node_ref *raw); |
---|
392 | |
---|
393 | /* write.c */ |
---|
394 | int jffs2_do_new_inode(struct jffs2_sb_info *c, struct jffs2_inode_info *f, uint32_t mode, struct jffs2_raw_inode *ri); |
---|
395 | |
---|
396 | struct jffs2_full_dnode *jffs2_write_dnode(struct jffs2_sb_info *c, struct jffs2_inode_info *f, |
---|
397 | struct jffs2_raw_inode *ri, const unsigned char *data, |
---|
398 | uint32_t datalen, int alloc_mode); |
---|
399 | struct jffs2_full_dirent *jffs2_write_dirent(struct jffs2_sb_info *c, struct jffs2_inode_info *f, |
---|
400 | struct jffs2_raw_dirent *rd, const unsigned char *name, |
---|
401 | uint32_t namelen, int alloc_mode); |
---|
402 | int jffs2_write_inode_range(struct jffs2_sb_info *c, struct jffs2_inode_info *f, |
---|
403 | struct jffs2_raw_inode *ri, unsigned char *buf, |
---|
404 | uint32_t offset, uint32_t writelen, uint32_t *retlen); |
---|
405 | int jffs2_do_create(struct jffs2_sb_info *c, struct jffs2_inode_info *dir_f, struct jffs2_inode_info *f, |
---|
406 | struct jffs2_raw_inode *ri, const struct qstr *qstr); |
---|
407 | int jffs2_do_unlink(struct jffs2_sb_info *c, struct jffs2_inode_info *dir_f, const char *name, |
---|
408 | int namelen, struct jffs2_inode_info *dead_f, uint32_t time); |
---|
409 | int jffs2_do_link(struct jffs2_sb_info *c, struct jffs2_inode_info *dir_f, uint32_t ino, |
---|
410 | uint8_t type, const char *name, int namelen, uint32_t time); |
---|
411 | |
---|
412 | |
---|
413 | /* readinode.c */ |
---|
414 | int jffs2_do_read_inode(struct jffs2_sb_info *c, struct jffs2_inode_info *f, |
---|
415 | uint32_t ino, struct jffs2_raw_inode *latest_node); |
---|
416 | int jffs2_do_crccheck_inode(struct jffs2_sb_info *c, struct jffs2_inode_cache *ic); |
---|
417 | void jffs2_do_clear_inode(struct jffs2_sb_info *c, struct jffs2_inode_info *f); |
---|
418 | |
---|
419 | /* malloc.c */ |
---|
420 | int jffs2_create_slab_caches(void); |
---|
421 | void jffs2_destroy_slab_caches(void); |
---|
422 | |
---|
423 | struct jffs2_full_dirent *jffs2_alloc_full_dirent(int namesize); |
---|
424 | void jffs2_free_full_dirent(struct jffs2_full_dirent *); |
---|
425 | struct jffs2_full_dnode *jffs2_alloc_full_dnode(void); |
---|
426 | void jffs2_free_full_dnode(struct jffs2_full_dnode *); |
---|
427 | struct jffs2_raw_dirent *jffs2_alloc_raw_dirent(void); |
---|
428 | void jffs2_free_raw_dirent(struct jffs2_raw_dirent *); |
---|
429 | struct jffs2_raw_inode *jffs2_alloc_raw_inode(void); |
---|
430 | void jffs2_free_raw_inode(struct jffs2_raw_inode *); |
---|
431 | struct jffs2_tmp_dnode_info *jffs2_alloc_tmp_dnode_info(void); |
---|
432 | void jffs2_free_tmp_dnode_info(struct jffs2_tmp_dnode_info *); |
---|
433 | int jffs2_prealloc_raw_node_refs(struct jffs2_sb_info *c, |
---|
434 | struct jffs2_eraseblock *jeb, int nr); |
---|
435 | void jffs2_free_refblock(struct jffs2_raw_node_ref *); |
---|
436 | struct jffs2_node_frag *jffs2_alloc_node_frag(void); |
---|
437 | void jffs2_free_node_frag(struct jffs2_node_frag *); |
---|
438 | struct jffs2_inode_cache *jffs2_alloc_inode_cache(void); |
---|
439 | void jffs2_free_inode_cache(struct jffs2_inode_cache *); |
---|
440 | #ifdef CONFIG_JFFS2_FS_XATTR |
---|
441 | struct jffs2_xattr_datum *jffs2_alloc_xattr_datum(void); |
---|
442 | void jffs2_free_xattr_datum(struct jffs2_xattr_datum *); |
---|
443 | struct jffs2_xattr_ref *jffs2_alloc_xattr_ref(void); |
---|
444 | void jffs2_free_xattr_ref(struct jffs2_xattr_ref *); |
---|
445 | #endif |
---|
446 | |
---|
447 | /* gc.c */ |
---|
448 | int jffs2_garbage_collect_pass(struct jffs2_sb_info *c); |
---|
449 | |
---|
450 | /* read.c */ |
---|
451 | int jffs2_read_dnode(struct jffs2_sb_info *c, struct jffs2_inode_info *f, |
---|
452 | struct jffs2_full_dnode *fd, unsigned char *buf, |
---|
453 | int ofs, int len); |
---|
454 | int jffs2_read_inode_range(struct jffs2_sb_info *c, struct jffs2_inode_info *f, |
---|
455 | unsigned char *buf, uint32_t offset, uint32_t len); |
---|
456 | char *jffs2_getlink(struct jffs2_sb_info *c, struct jffs2_inode_info *f); |
---|
457 | |
---|
458 | /* scan.c */ |
---|
459 | int jffs2_scan_medium(struct jffs2_sb_info *c); |
---|
460 | void jffs2_rotate_lists(struct jffs2_sb_info *c); |
---|
461 | struct jffs2_inode_cache *jffs2_scan_make_ino_cache(struct jffs2_sb_info *c, uint32_t ino); |
---|
462 | int jffs2_scan_classify_jeb(struct jffs2_sb_info *c, struct jffs2_eraseblock *jeb); |
---|
463 | int jffs2_scan_dirty_space(struct jffs2_sb_info *c, struct jffs2_eraseblock *jeb, uint32_t size); |
---|
464 | |
---|
465 | /* build.c */ |
---|
466 | int jffs2_do_mount_fs(struct jffs2_sb_info *c); |
---|
467 | |
---|
468 | /* erase.c */ |
---|
469 | int jffs2_erase_pending_blocks(struct jffs2_sb_info *c, int count); |
---|
470 | void jffs2_free_jeb_node_refs(struct jffs2_sb_info *c, struct jffs2_eraseblock *jeb); |
---|
471 | |
---|
472 | #ifdef CONFIG_JFFS2_FS_WRITEBUFFER |
---|
473 | /* wbuf.c */ |
---|
474 | int jffs2_flush_wbuf_gc(struct jffs2_sb_info *c, uint32_t ino); |
---|
475 | int jffs2_flush_wbuf_pad(struct jffs2_sb_info *c); |
---|
476 | int jffs2_check_nand_cleanmarker(struct jffs2_sb_info *c, struct jffs2_eraseblock *jeb); |
---|
477 | int jffs2_write_nand_cleanmarker(struct jffs2_sb_info *c, struct jffs2_eraseblock *jeb); |
---|
478 | #endif |
---|
479 | |
---|
480 | #include "debug.h" |
---|
481 | |
---|
482 | #endif /* __JFFS2_NODELIST_H__ */ |
---|