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e631ddba FH |
1 | /* |
2 | * JFFS2 -- Journalling Flash File System, Version 2. | |
3 | * | |
c00c310e | 4 | * Copyright © 2004 Ferenc Havasi <havasi@inf.u-szeged.hu>, |
ef53cb02 DW |
5 | * Zoltan Sogor <weth@inf.u-szeged.hu>, |
6 | * Patrik Kluba <pajko@halom.u-szeged.hu>, | |
7 | * University of Szeged, Hungary | |
8 | * 2006 KaiGai Kohei <kaigai@ak.jp.nec.com> | |
e631ddba FH |
9 | * |
10 | * For licensing information, see the file 'LICENCE' in this directory. | |
11 | * | |
e631ddba FH |
12 | */ |
13 | ||
14 | #include <linux/kernel.h> | |
e631ddba FH |
15 | #include <linux/slab.h> |
16 | #include <linux/mtd/mtd.h> | |
17 | #include <linux/pagemap.h> | |
18 | #include <linux/crc32.h> | |
19 | #include <linux/compiler.h> | |
20 | #include <linux/vmalloc.h> | |
21 | #include "nodelist.h" | |
22 | #include "debug.h" | |
23 | ||
24 | int jffs2_sum_init(struct jffs2_sb_info *c) | |
25 | { | |
3d375d9e | 26 | c->summary = kzalloc(sizeof(struct jffs2_summary), GFP_KERNEL); |
e631ddba FH |
27 | |
28 | if (!c->summary) { | |
29 | JFFS2_WARNING("Can't allocate memory for summary information!\n"); | |
30 | return -ENOMEM; | |
31 | } | |
32 | ||
e631ddba FH |
33 | c->summary->sum_buf = vmalloc(c->sector_size); |
34 | ||
35 | if (!c->summary->sum_buf) { | |
36 | JFFS2_WARNING("Can't allocate buffer for writing out summary information!\n"); | |
733802d9 | 37 | kfree(c->summary); |
e631ddba FH |
38 | return -ENOMEM; |
39 | } | |
40 | ||
d6e05edc | 41 | dbg_summary("returned successfully\n"); |
e631ddba FH |
42 | |
43 | return 0; | |
44 | } | |
45 | ||
46 | void jffs2_sum_exit(struct jffs2_sb_info *c) | |
47 | { | |
733802d9 | 48 | dbg_summary("called\n"); |
e631ddba FH |
49 | |
50 | jffs2_sum_disable_collecting(c->summary); | |
51 | ||
52 | vfree(c->summary->sum_buf); | |
53 | c->summary->sum_buf = NULL; | |
54 | ||
55 | kfree(c->summary); | |
56 | c->summary = NULL; | |
57 | } | |
58 | ||
59 | static int jffs2_sum_add_mem(struct jffs2_summary *s, union jffs2_sum_mem *item) | |
60 | { | |
61 | if (!s->sum_list_head) | |
62 | s->sum_list_head = (union jffs2_sum_mem *) item; | |
63 | if (s->sum_list_tail) | |
64 | s->sum_list_tail->u.next = (union jffs2_sum_mem *) item; | |
65 | s->sum_list_tail = (union jffs2_sum_mem *) item; | |
66 | ||
67 | switch (je16_to_cpu(item->u.nodetype)) { | |
68 | case JFFS2_NODETYPE_INODE: | |
69 | s->sum_size += JFFS2_SUMMARY_INODE_SIZE; | |
70 | s->sum_num++; | |
733802d9 | 71 | dbg_summary("inode (%u) added to summary\n", |
e631ddba FH |
72 | je32_to_cpu(item->i.inode)); |
73 | break; | |
74 | case JFFS2_NODETYPE_DIRENT: | |
75 | s->sum_size += JFFS2_SUMMARY_DIRENT_SIZE(item->d.nsize); | |
76 | s->sum_num++; | |
733802d9 | 77 | dbg_summary("dirent (%u) added to summary\n", |
e631ddba FH |
78 | je32_to_cpu(item->d.ino)); |
79 | break; | |
aa98d7cf KK |
80 | #ifdef CONFIG_JFFS2_FS_XATTR |
81 | case JFFS2_NODETYPE_XATTR: | |
82 | s->sum_size += JFFS2_SUMMARY_XATTR_SIZE; | |
83 | s->sum_num++; | |
84 | dbg_summary("xattr (xid=%u, version=%u) added to summary\n", | |
85 | je32_to_cpu(item->x.xid), je32_to_cpu(item->x.version)); | |
86 | break; | |
87 | case JFFS2_NODETYPE_XREF: | |
88 | s->sum_size += JFFS2_SUMMARY_XREF_SIZE; | |
89 | s->sum_num++; | |
90 | dbg_summary("xref added to summary\n"); | |
91 | break; | |
92 | #endif | |
e631ddba | 93 | default: |
182ec4ee | 94 | JFFS2_WARNING("UNKNOWN node type %u\n", |
e631ddba FH |
95 | je16_to_cpu(item->u.nodetype)); |
96 | return 1; | |
97 | } | |
98 | return 0; | |
99 | } | |
100 | ||
101 | ||
102 | /* The following 3 functions are called from scan.c to collect summary info for not closed jeb */ | |
103 | ||
104 | int jffs2_sum_add_padding_mem(struct jffs2_summary *s, uint32_t size) | |
105 | { | |
733802d9 | 106 | dbg_summary("called with %u\n", size); |
e631ddba FH |
107 | s->sum_padded += size; |
108 | return 0; | |
109 | } | |
110 | ||
111 | int jffs2_sum_add_inode_mem(struct jffs2_summary *s, struct jffs2_raw_inode *ri, | |
112 | uint32_t ofs) | |
113 | { | |
114 | struct jffs2_sum_inode_mem *temp = kmalloc(sizeof(struct jffs2_sum_inode_mem), GFP_KERNEL); | |
115 | ||
116 | if (!temp) | |
117 | return -ENOMEM; | |
118 | ||
119 | temp->nodetype = ri->nodetype; | |
120 | temp->inode = ri->ino; | |
121 | temp->version = ri->version; | |
122 | temp->offset = cpu_to_je32(ofs); /* relative offset from the begining of the jeb */ | |
123 | temp->totlen = ri->totlen; | |
124 | temp->next = NULL; | |
125 | ||
126 | return jffs2_sum_add_mem(s, (union jffs2_sum_mem *)temp); | |
127 | } | |
128 | ||
129 | int jffs2_sum_add_dirent_mem(struct jffs2_summary *s, struct jffs2_raw_dirent *rd, | |
130 | uint32_t ofs) | |
131 | { | |
132 | struct jffs2_sum_dirent_mem *temp = | |
133 | kmalloc(sizeof(struct jffs2_sum_dirent_mem) + rd->nsize, GFP_KERNEL); | |
134 | ||
135 | if (!temp) | |
136 | return -ENOMEM; | |
137 | ||
138 | temp->nodetype = rd->nodetype; | |
139 | temp->totlen = rd->totlen; | |
140 | temp->offset = cpu_to_je32(ofs); /* relative from the begining of the jeb */ | |
141 | temp->pino = rd->pino; | |
142 | temp->version = rd->version; | |
143 | temp->ino = rd->ino; | |
144 | temp->nsize = rd->nsize; | |
145 | temp->type = rd->type; | |
146 | temp->next = NULL; | |
147 | ||
148 | memcpy(temp->name, rd->name, rd->nsize); | |
149 | ||
150 | return jffs2_sum_add_mem(s, (union jffs2_sum_mem *)temp); | |
151 | } | |
152 | ||
aa98d7cf KK |
153 | #ifdef CONFIG_JFFS2_FS_XATTR |
154 | int jffs2_sum_add_xattr_mem(struct jffs2_summary *s, struct jffs2_raw_xattr *rx, uint32_t ofs) | |
155 | { | |
156 | struct jffs2_sum_xattr_mem *temp; | |
157 | ||
158 | temp = kmalloc(sizeof(struct jffs2_sum_xattr_mem), GFP_KERNEL); | |
159 | if (!temp) | |
160 | return -ENOMEM; | |
161 | ||
162 | temp->nodetype = rx->nodetype; | |
163 | temp->xid = rx->xid; | |
164 | temp->version = rx->version; | |
165 | temp->offset = cpu_to_je32(ofs); | |
166 | temp->totlen = rx->totlen; | |
167 | temp->next = NULL; | |
168 | ||
169 | return jffs2_sum_add_mem(s, (union jffs2_sum_mem *)temp); | |
170 | } | |
171 | ||
172 | int jffs2_sum_add_xref_mem(struct jffs2_summary *s, struct jffs2_raw_xref *rr, uint32_t ofs) | |
173 | { | |
174 | struct jffs2_sum_xref_mem *temp; | |
175 | ||
176 | temp = kmalloc(sizeof(struct jffs2_sum_xref_mem), GFP_KERNEL); | |
177 | if (!temp) | |
178 | return -ENOMEM; | |
179 | ||
180 | temp->nodetype = rr->nodetype; | |
181 | temp->offset = cpu_to_je32(ofs); | |
182 | temp->next = NULL; | |
183 | ||
184 | return jffs2_sum_add_mem(s, (union jffs2_sum_mem *)temp); | |
185 | } | |
186 | #endif | |
e631ddba FH |
187 | /* Cleanup every collected summary information */ |
188 | ||
189 | static void jffs2_sum_clean_collected(struct jffs2_summary *s) | |
190 | { | |
191 | union jffs2_sum_mem *temp; | |
192 | ||
193 | if (!s->sum_list_head) { | |
733802d9 | 194 | dbg_summary("already empty\n"); |
e631ddba FH |
195 | } |
196 | while (s->sum_list_head) { | |
197 | temp = s->sum_list_head; | |
198 | s->sum_list_head = s->sum_list_head->u.next; | |
199 | kfree(temp); | |
200 | } | |
201 | s->sum_list_tail = NULL; | |
202 | s->sum_padded = 0; | |
203 | s->sum_num = 0; | |
204 | } | |
205 | ||
206 | void jffs2_sum_reset_collected(struct jffs2_summary *s) | |
207 | { | |
733802d9 | 208 | dbg_summary("called\n"); |
e631ddba FH |
209 | jffs2_sum_clean_collected(s); |
210 | s->sum_size = 0; | |
211 | } | |
212 | ||
213 | void jffs2_sum_disable_collecting(struct jffs2_summary *s) | |
214 | { | |
733802d9 | 215 | dbg_summary("called\n"); |
e631ddba FH |
216 | jffs2_sum_clean_collected(s); |
217 | s->sum_size = JFFS2_SUMMARY_NOSUM_SIZE; | |
218 | } | |
219 | ||
182ec4ee | 220 | int jffs2_sum_is_disabled(struct jffs2_summary *s) |
e631ddba FH |
221 | { |
222 | return (s->sum_size == JFFS2_SUMMARY_NOSUM_SIZE); | |
223 | } | |
224 | ||
225 | /* Move the collected summary information into sb (called from scan.c) */ | |
226 | ||
227 | void jffs2_sum_move_collected(struct jffs2_sb_info *c, struct jffs2_summary *s) | |
228 | { | |
733802d9 | 229 | dbg_summary("oldsize=0x%x oldnum=%u => newsize=0x%x newnum=%u\n", |
e631ddba FH |
230 | c->summary->sum_size, c->summary->sum_num, |
231 | s->sum_size, s->sum_num); | |
232 | ||
233 | c->summary->sum_size = s->sum_size; | |
234 | c->summary->sum_num = s->sum_num; | |
235 | c->summary->sum_padded = s->sum_padded; | |
236 | c->summary->sum_list_head = s->sum_list_head; | |
237 | c->summary->sum_list_tail = s->sum_list_tail; | |
238 | ||
239 | s->sum_list_head = s->sum_list_tail = NULL; | |
240 | } | |
241 | ||
242 | /* Called from wbuf.c to collect writed node info */ | |
243 | ||
244 | int jffs2_sum_add_kvec(struct jffs2_sb_info *c, const struct kvec *invecs, | |
245 | unsigned long count, uint32_t ofs) | |
246 | { | |
247 | union jffs2_node_union *node; | |
248 | struct jffs2_eraseblock *jeb; | |
249 | ||
27bea327 ZS |
250 | if (c->summary->sum_size == JFFS2_SUMMARY_NOSUM_SIZE) { |
251 | dbg_summary("Summary is disabled for this jeb! Skipping summary info!\n"); | |
252 | return 0; | |
253 | } | |
254 | ||
e631ddba FH |
255 | node = invecs[0].iov_base; |
256 | jeb = &c->blocks[ofs / c->sector_size]; | |
257 | ofs -= jeb->offset; | |
258 | ||
259 | switch (je16_to_cpu(node->u.nodetype)) { | |
260 | case JFFS2_NODETYPE_INODE: { | |
261 | struct jffs2_sum_inode_mem *temp = | |
262 | kmalloc(sizeof(struct jffs2_sum_inode_mem), GFP_KERNEL); | |
263 | ||
264 | if (!temp) | |
265 | goto no_mem; | |
266 | ||
267 | temp->nodetype = node->i.nodetype; | |
268 | temp->inode = node->i.ino; | |
269 | temp->version = node->i.version; | |
270 | temp->offset = cpu_to_je32(ofs); | |
271 | temp->totlen = node->i.totlen; | |
272 | temp->next = NULL; | |
273 | ||
274 | return jffs2_sum_add_mem(c->summary, (union jffs2_sum_mem *)temp); | |
275 | } | |
276 | ||
277 | case JFFS2_NODETYPE_DIRENT: { | |
278 | struct jffs2_sum_dirent_mem *temp = | |
279 | kmalloc(sizeof(struct jffs2_sum_dirent_mem) + node->d.nsize, GFP_KERNEL); | |
280 | ||
281 | if (!temp) | |
282 | goto no_mem; | |
283 | ||
284 | temp->nodetype = node->d.nodetype; | |
285 | temp->totlen = node->d.totlen; | |
286 | temp->offset = cpu_to_je32(ofs); | |
287 | temp->pino = node->d.pino; | |
288 | temp->version = node->d.version; | |
289 | temp->ino = node->d.ino; | |
290 | temp->nsize = node->d.nsize; | |
291 | temp->type = node->d.type; | |
292 | temp->next = NULL; | |
293 | ||
294 | switch (count) { | |
295 | case 1: | |
296 | memcpy(temp->name,node->d.name,node->d.nsize); | |
297 | break; | |
298 | ||
299 | case 2: | |
300 | memcpy(temp->name,invecs[1].iov_base,node->d.nsize); | |
301 | break; | |
302 | ||
303 | default: | |
304 | BUG(); /* impossible count value */ | |
305 | break; | |
306 | } | |
307 | ||
308 | return jffs2_sum_add_mem(c->summary, (union jffs2_sum_mem *)temp); | |
309 | } | |
aa98d7cf KK |
310 | #ifdef CONFIG_JFFS2_FS_XATTR |
311 | case JFFS2_NODETYPE_XATTR: { | |
312 | struct jffs2_sum_xattr_mem *temp; | |
aa98d7cf KK |
313 | temp = kmalloc(sizeof(struct jffs2_sum_xattr_mem), GFP_KERNEL); |
314 | if (!temp) | |
315 | goto no_mem; | |
e631ddba | 316 | |
aa98d7cf KK |
317 | temp->nodetype = node->x.nodetype; |
318 | temp->xid = node->x.xid; | |
319 | temp->version = node->x.version; | |
320 | temp->totlen = node->x.totlen; | |
321 | temp->offset = cpu_to_je32(ofs); | |
322 | temp->next = NULL; | |
323 | ||
324 | return jffs2_sum_add_mem(c->summary, (union jffs2_sum_mem *)temp); | |
325 | } | |
326 | case JFFS2_NODETYPE_XREF: { | |
327 | struct jffs2_sum_xref_mem *temp; | |
aa98d7cf KK |
328 | temp = kmalloc(sizeof(struct jffs2_sum_xref_mem), GFP_KERNEL); |
329 | if (!temp) | |
330 | goto no_mem; | |
331 | temp->nodetype = node->r.nodetype; | |
332 | temp->offset = cpu_to_je32(ofs); | |
333 | temp->next = NULL; | |
334 | ||
335 | return jffs2_sum_add_mem(c->summary, (union jffs2_sum_mem *)temp); | |
336 | } | |
337 | #endif | |
e631ddba | 338 | case JFFS2_NODETYPE_PADDING: |
733802d9 | 339 | dbg_summary("node PADDING\n"); |
e631ddba FH |
340 | c->summary->sum_padded += je32_to_cpu(node->u.totlen); |
341 | break; | |
342 | ||
343 | case JFFS2_NODETYPE_CLEANMARKER: | |
733802d9 | 344 | dbg_summary("node CLEANMARKER\n"); |
e631ddba FH |
345 | break; |
346 | ||
347 | case JFFS2_NODETYPE_SUMMARY: | |
733802d9 | 348 | dbg_summary("node SUMMARY\n"); |
e631ddba FH |
349 | break; |
350 | ||
351 | default: | |
352 | /* If you implement a new node type you should also implement | |
353 | summary support for it or disable summary. | |
354 | */ | |
355 | BUG(); | |
356 | break; | |
357 | } | |
358 | ||
359 | return 0; | |
360 | ||
361 | no_mem: | |
362 | JFFS2_WARNING("MEMORY ALLOCATION ERROR!"); | |
363 | return -ENOMEM; | |
364 | } | |
365 | ||
2f785402 DW |
366 | static struct jffs2_raw_node_ref *sum_link_node_ref(struct jffs2_sb_info *c, |
367 | struct jffs2_eraseblock *jeb, | |
368 | uint32_t ofs, uint32_t len, | |
369 | struct jffs2_inode_cache *ic) | |
49f11d40 | 370 | { |
49f11d40 | 371 | /* If there was a gap, mark it dirty */ |
2f785402 DW |
372 | if ((ofs & ~3) > c->sector_size - jeb->free_size) { |
373 | /* Ew. Summary doesn't actually tell us explicitly about dirty space */ | |
374 | jffs2_scan_dirty_space(c, jeb, (ofs & ~3) - (c->sector_size - jeb->free_size)); | |
49f11d40 | 375 | } |
49f11d40 | 376 | |
2f785402 | 377 | return jffs2_link_node_ref(c, jeb, jeb->offset + ofs, len, ic); |
49f11d40 | 378 | } |
e631ddba FH |
379 | |
380 | /* Process the stored summary information - helper function for jffs2_sum_scan_sumnode() */ | |
381 | ||
382 | static int jffs2_sum_process_sum_data(struct jffs2_sb_info *c, struct jffs2_eraseblock *jeb, | |
2bc9764c | 383 | struct jffs2_raw_summary *summary, uint32_t *pseudo_random) |
e631ddba | 384 | { |
e631ddba FH |
385 | struct jffs2_inode_cache *ic; |
386 | struct jffs2_full_dirent *fd; | |
387 | void *sp; | |
388 | int i, ino; | |
68270995 | 389 | int err; |
e631ddba FH |
390 | |
391 | sp = summary->sum; | |
392 | ||
393 | for (i=0; i<je32_to_cpu(summary->sum_num); i++) { | |
733802d9 | 394 | dbg_summary("processing summary index %d\n", i); |
e631ddba | 395 | |
a2166b93 AB |
396 | cond_resched(); |
397 | ||
2f785402 | 398 | /* Make sure there's a spare ref for dirty space */ |
046b8b98 | 399 | err = jffs2_prealloc_raw_node_refs(c, jeb, 2); |
2f785402 DW |
400 | if (err) |
401 | return err; | |
402 | ||
e631ddba FH |
403 | switch (je16_to_cpu(((struct jffs2_sum_unknown_flash *)sp)->nodetype)) { |
404 | case JFFS2_NODETYPE_INODE: { | |
405 | struct jffs2_sum_inode_flash *spi; | |
406 | spi = sp; | |
407 | ||
408 | ino = je32_to_cpu(spi->inode); | |
409 | ||
9167e0f8 DW |
410 | dbg_summary("Inode at 0x%08x-0x%08x\n", |
411 | jeb->offset + je32_to_cpu(spi->offset), | |
8b9e9fe8 | 412 | jeb->offset + je32_to_cpu(spi->offset) + je32_to_cpu(spi->totlen)); |
e631ddba | 413 | |
e631ddba FH |
414 | ic = jffs2_scan_make_ino_cache(c, ino); |
415 | if (!ic) { | |
416 | JFFS2_NOTICE("scan_make_ino_cache failed\n"); | |
e631ddba FH |
417 | return -ENOMEM; |
418 | } | |
419 | ||
2f785402 DW |
420 | sum_link_node_ref(c, jeb, je32_to_cpu(spi->offset) | REF_UNCHECKED, |
421 | PAD(je32_to_cpu(spi->totlen)), ic); | |
f1f9671b DW |
422 | |
423 | *pseudo_random += je32_to_cpu(spi->version); | |
e631ddba FH |
424 | |
425 | sp += JFFS2_SUMMARY_INODE_SIZE; | |
426 | ||
427 | break; | |
428 | } | |
429 | ||
430 | case JFFS2_NODETYPE_DIRENT: { | |
431 | struct jffs2_sum_dirent_flash *spd; | |
b534e70c | 432 | int checkedlen; |
e631ddba FH |
433 | spd = sp; |
434 | ||
8b9e9fe8 | 435 | dbg_summary("Dirent at 0x%08x-0x%08x\n", |
9167e0f8 DW |
436 | jeb->offset + je32_to_cpu(spd->offset), |
437 | jeb->offset + je32_to_cpu(spd->offset) + je32_to_cpu(spd->totlen)); | |
438 | ||
e631ddba | 439 | |
b534e70c DW |
440 | /* This should never happen, but https://dev.laptop.org/ticket/4184 */ |
441 | checkedlen = strnlen(spd->name, spd->nsize); | |
442 | if (!checkedlen) { | |
443 | printk(KERN_ERR "Dirent at %08x has zero at start of name. Aborting mount.\n", | |
444 | jeb->offset + je32_to_cpu(spd->offset)); | |
445 | return -EIO; | |
446 | } | |
447 | if (checkedlen < spd->nsize) { | |
448 | printk(KERN_ERR "Dirent at %08x has zeroes in name. Truncating to %d chars\n", | |
449 | jeb->offset + je32_to_cpu(spd->offset), checkedlen); | |
450 | } | |
451 | ||
452 | ||
453 | fd = jffs2_alloc_full_dirent(checkedlen+1); | |
9641b784 | 454 | if (!fd) |
e631ddba | 455 | return -ENOMEM; |
e631ddba | 456 | |
b534e70c DW |
457 | memcpy(&fd->name, spd->name, checkedlen); |
458 | fd->name[checkedlen] = 0; | |
e631ddba | 459 | |
e631ddba FH |
460 | ic = jffs2_scan_make_ino_cache(c, je32_to_cpu(spd->pino)); |
461 | if (!ic) { | |
462 | jffs2_free_full_dirent(fd); | |
e631ddba FH |
463 | return -ENOMEM; |
464 | } | |
465 | ||
1046d880 | 466 | fd->raw = sum_link_node_ref(c, jeb, je32_to_cpu(spd->offset) | REF_UNCHECKED, |
2f785402 | 467 | PAD(je32_to_cpu(spd->totlen)), ic); |
e631ddba | 468 | |
e631ddba FH |
469 | fd->next = NULL; |
470 | fd->version = je32_to_cpu(spd->version); | |
471 | fd->ino = je32_to_cpu(spd->ino); | |
b534e70c | 472 | fd->nhash = full_name_hash(fd->name, checkedlen); |
e631ddba | 473 | fd->type = spd->type; |
f1f9671b | 474 | |
e631ddba FH |
475 | jffs2_add_fd_to_list(c, fd, &ic->scan_dents); |
476 | ||
477 | *pseudo_random += je32_to_cpu(spd->version); | |
478 | ||
479 | sp += JFFS2_SUMMARY_DIRENT_SIZE(spd->nsize); | |
480 | ||
481 | break; | |
482 | } | |
aa98d7cf KK |
483 | #ifdef CONFIG_JFFS2_FS_XATTR |
484 | case JFFS2_NODETYPE_XATTR: { | |
485 | struct jffs2_xattr_datum *xd; | |
486 | struct jffs2_sum_xattr_flash *spx; | |
aa98d7cf KK |
487 | |
488 | spx = (struct jffs2_sum_xattr_flash *)sp; | |
9167e0f8 | 489 | dbg_summary("xattr at %#08x-%#08x (xid=%u, version=%u)\n", |
49f11d40 | 490 | jeb->offset + je32_to_cpu(spx->offset), |
9167e0f8 | 491 | jeb->offset + je32_to_cpu(spx->offset) + je32_to_cpu(spx->totlen), |
aa98d7cf | 492 | je32_to_cpu(spx->xid), je32_to_cpu(spx->version)); |
2f785402 | 493 | |
aa98d7cf KK |
494 | xd = jffs2_setup_xattr_datum(c, je32_to_cpu(spx->xid), |
495 | je32_to_cpu(spx->version)); | |
c9f700f8 | 496 | if (IS_ERR(xd)) |
aa98d7cf | 497 | return PTR_ERR(xd); |
c9f700f8 KK |
498 | if (xd->version > je32_to_cpu(spx->version)) { |
499 | /* node is not the newest one */ | |
500 | struct jffs2_raw_node_ref *raw | |
501 | = sum_link_node_ref(c, jeb, je32_to_cpu(spx->offset) | REF_UNCHECKED, | |
502 | PAD(je32_to_cpu(spx->totlen)), NULL); | |
503 | raw->next_in_ino = xd->node->next_in_ino; | |
504 | xd->node->next_in_ino = raw; | |
505 | } else { | |
506 | xd->version = je32_to_cpu(spx->version); | |
507 | sum_link_node_ref(c, jeb, je32_to_cpu(spx->offset) | REF_UNCHECKED, | |
508 | PAD(je32_to_cpu(spx->totlen)), (void *)xd); | |
aa98d7cf | 509 | } |
aa98d7cf | 510 | *pseudo_random += je32_to_cpu(spx->xid); |
aa98d7cf KK |
511 | sp += JFFS2_SUMMARY_XATTR_SIZE; |
512 | ||
513 | break; | |
514 | } | |
515 | case JFFS2_NODETYPE_XREF: { | |
516 | struct jffs2_xattr_ref *ref; | |
517 | struct jffs2_sum_xref_flash *spr; | |
aa98d7cf KK |
518 | |
519 | spr = (struct jffs2_sum_xref_flash *)sp; | |
9167e0f8 | 520 | dbg_summary("xref at %#08x-%#08x\n", |
49f11d40 | 521 | jeb->offset + je32_to_cpu(spr->offset), |
9bfeb691 DW |
522 | jeb->offset + je32_to_cpu(spr->offset) + |
523 | (uint32_t)PAD(sizeof(struct jffs2_raw_xref))); | |
9167e0f8 | 524 | |
aa98d7cf KK |
525 | ref = jffs2_alloc_xattr_ref(); |
526 | if (!ref) { | |
527 | JFFS2_NOTICE("allocation of xattr_datum failed\n"); | |
aa98d7cf KK |
528 | return -ENOMEM; |
529 | } | |
8f2b6f49 KK |
530 | ref->next = c->xref_temp; |
531 | c->xref_temp = ref; | |
aa98d7cf | 532 | |
c9f700f8 KK |
533 | sum_link_node_ref(c, jeb, je32_to_cpu(spr->offset) | REF_UNCHECKED, |
534 | PAD(sizeof(struct jffs2_raw_xref)), (void *)ref); | |
aa98d7cf | 535 | |
2f785402 | 536 | *pseudo_random += ref->node->flash_offset; |
aa98d7cf | 537 | sp += JFFS2_SUMMARY_XREF_SIZE; |
e631ddba | 538 | |
aa98d7cf KK |
539 | break; |
540 | } | |
541 | #endif | |
e631ddba | 542 | default : { |
7807ef7b DW |
543 | uint16_t nodetype = je16_to_cpu(((struct jffs2_sum_unknown_flash *)sp)->nodetype); |
544 | JFFS2_WARNING("Unsupported node type %x found in summary! Exiting...\n", nodetype); | |
545 | if ((nodetype & JFFS2_COMPAT_MASK) == JFFS2_FEATURE_INCOMPAT) | |
546 | return -EIO; | |
547 | ||
548 | /* For compatible node types, just fall back to the full scan */ | |
549 | c->wasted_size -= jeb->wasted_size; | |
550 | c->free_size += c->sector_size - jeb->free_size; | |
551 | c->used_size -= jeb->used_size; | |
552 | c->dirty_size -= jeb->dirty_size; | |
553 | jeb->wasted_size = jeb->used_size = jeb->dirty_size = 0; | |
554 | jeb->free_size = c->sector_size; | |
555 | ||
c38c1b61 | 556 | jffs2_free_jeb_node_refs(c, jeb); |
7807ef7b | 557 | return -ENOTRECOVERABLE; |
e631ddba FH |
558 | } |
559 | } | |
560 | } | |
e631ddba FH |
561 | return 0; |
562 | } | |
563 | ||
564 | /* Process the summary node - called from jffs2_scan_eraseblock() */ | |
e631ddba | 565 | int jffs2_sum_scan_sumnode(struct jffs2_sb_info *c, struct jffs2_eraseblock *jeb, |
9641b784 DW |
566 | struct jffs2_raw_summary *summary, uint32_t sumsize, |
567 | uint32_t *pseudo_random) | |
e631ddba FH |
568 | { |
569 | struct jffs2_unknown_node crcnode; | |
9641b784 | 570 | int ret, ofs; |
e631ddba FH |
571 | uint32_t crc; |
572 | ||
49f11d40 | 573 | ofs = c->sector_size - sumsize; |
e631ddba | 574 | |
733802d9 | 575 | dbg_summary("summary found for 0x%08x at 0x%08x (0x%x bytes)\n", |
49f11d40 | 576 | jeb->offset, jeb->offset + ofs, sumsize); |
e631ddba FH |
577 | |
578 | /* OK, now check for node validity and CRC */ | |
579 | crcnode.magic = cpu_to_je16(JFFS2_MAGIC_BITMASK); | |
580 | crcnode.nodetype = cpu_to_je16(JFFS2_NODETYPE_SUMMARY); | |
581 | crcnode.totlen = summary->totlen; | |
582 | crc = crc32(0, &crcnode, sizeof(crcnode)-4); | |
583 | ||
584 | if (je32_to_cpu(summary->hdr_crc) != crc) { | |
733802d9 | 585 | dbg_summary("Summary node header is corrupt (bad CRC or " |
e631ddba FH |
586 | "no summary at all)\n"); |
587 | goto crc_err; | |
588 | } | |
589 | ||
590 | if (je32_to_cpu(summary->totlen) != sumsize) { | |
733802d9 | 591 | dbg_summary("Summary node is corrupt (wrong erasesize?)\n"); |
e631ddba FH |
592 | goto crc_err; |
593 | } | |
594 | ||
2bc9764c | 595 | crc = crc32(0, summary, sizeof(struct jffs2_raw_summary)-8); |
e631ddba FH |
596 | |
597 | if (je32_to_cpu(summary->node_crc) != crc) { | |
733802d9 | 598 | dbg_summary("Summary node is corrupt (bad CRC)\n"); |
e631ddba FH |
599 | goto crc_err; |
600 | } | |
601 | ||
2bc9764c | 602 | crc = crc32(0, summary->sum, sumsize - sizeof(struct jffs2_raw_summary)); |
e631ddba FH |
603 | |
604 | if (je32_to_cpu(summary->sum_crc) != crc) { | |
733802d9 | 605 | dbg_summary("Summary node data is corrupt (bad CRC)\n"); |
e631ddba FH |
606 | goto crc_err; |
607 | } | |
608 | ||
609 | if ( je32_to_cpu(summary->cln_mkr) ) { | |
610 | ||
733802d9 | 611 | dbg_summary("Summary : CLEANMARKER node \n"); |
e631ddba | 612 | |
098a1981 DW |
613 | ret = jffs2_prealloc_raw_node_refs(c, jeb, 1); |
614 | if (ret) | |
615 | return ret; | |
616 | ||
e631ddba | 617 | if (je32_to_cpu(summary->cln_mkr) != c->cleanmarker_size) { |
733802d9 | 618 | dbg_summary("CLEANMARKER node has totlen 0x%x != normal 0x%x\n", |
e631ddba | 619 | je32_to_cpu(summary->cln_mkr), c->cleanmarker_size); |
098a1981 DW |
620 | if ((ret = jffs2_scan_dirty_space(c, jeb, PAD(je32_to_cpu(summary->cln_mkr))))) |
621 | return ret; | |
e631ddba | 622 | } else if (jeb->first_node) { |
733802d9 | 623 | dbg_summary("CLEANMARKER node not first node in block " |
e631ddba | 624 | "(0x%08x)\n", jeb->offset); |
098a1981 DW |
625 | if ((ret = jffs2_scan_dirty_space(c, jeb, PAD(je32_to_cpu(summary->cln_mkr))))) |
626 | return ret; | |
e631ddba | 627 | } else { |
2f785402 DW |
628 | jffs2_link_node_ref(c, jeb, jeb->offset | REF_NORMAL, |
629 | je32_to_cpu(summary->cln_mkr), NULL); | |
e631ddba FH |
630 | } |
631 | } | |
632 | ||
e631ddba | 633 | ret = jffs2_sum_process_sum_data(c, jeb, summary, pseudo_random); |
7807ef7b DW |
634 | /* -ENOTRECOVERABLE isn't a fatal error -- it means we should do a full |
635 | scan of this eraseblock. So return zero */ | |
636 | if (ret == -ENOTRECOVERABLE) | |
637 | return 0; | |
e631ddba | 638 | if (ret) |
7807ef7b | 639 | return ret; /* real error */ |
e631ddba FH |
640 | |
641 | /* for PARANOIA_CHECK */ | |
046b8b98 | 642 | ret = jffs2_prealloc_raw_node_refs(c, jeb, 2); |
2f785402 DW |
643 | if (ret) |
644 | return ret; | |
e631ddba | 645 | |
f61579c3 | 646 | sum_link_node_ref(c, jeb, ofs | REF_NORMAL, sumsize, NULL); |
e631ddba | 647 | |
49f11d40 DW |
648 | if (unlikely(jeb->free_size)) { |
649 | JFFS2_WARNING("Free size 0x%x bytes in eraseblock @0x%08x with summary?\n", | |
650 | jeb->free_size, jeb->offset); | |
651 | jeb->wasted_size += jeb->free_size; | |
652 | c->wasted_size += jeb->free_size; | |
653 | c->free_size -= jeb->free_size; | |
654 | jeb->free_size = 0; | |
655 | } | |
e631ddba FH |
656 | |
657 | return jffs2_scan_classify_jeb(c, jeb); | |
658 | ||
659 | crc_err: | |
660 | JFFS2_WARNING("Summary node crc error, skipping summary information.\n"); | |
661 | ||
662 | return 0; | |
663 | } | |
664 | ||
665 | /* Write summary data to flash - helper function for jffs2_sum_write_sumnode() */ | |
666 | ||
667 | static int jffs2_sum_write_data(struct jffs2_sb_info *c, struct jffs2_eraseblock *jeb, | |
668 | uint32_t infosize, uint32_t datasize, int padsize) | |
669 | { | |
2bc9764c | 670 | struct jffs2_raw_summary isum; |
e631ddba FH |
671 | union jffs2_sum_mem *temp; |
672 | struct jffs2_sum_marker *sm; | |
673 | struct kvec vecs[2]; | |
2f785402 | 674 | uint32_t sum_ofs; |
e631ddba FH |
675 | void *wpage; |
676 | int ret; | |
677 | size_t retlen; | |
678 | ||
679 | memset(c->summary->sum_buf, 0xff, datasize); | |
680 | memset(&isum, 0, sizeof(isum)); | |
681 | ||
682 | isum.magic = cpu_to_je16(JFFS2_MAGIC_BITMASK); | |
683 | isum.nodetype = cpu_to_je16(JFFS2_NODETYPE_SUMMARY); | |
684 | isum.totlen = cpu_to_je32(infosize); | |
685 | isum.hdr_crc = cpu_to_je32(crc32(0, &isum, sizeof(struct jffs2_unknown_node) - 4)); | |
686 | isum.padded = cpu_to_je32(c->summary->sum_padded); | |
687 | isum.cln_mkr = cpu_to_je32(c->cleanmarker_size); | |
688 | isum.sum_num = cpu_to_je32(c->summary->sum_num); | |
689 | wpage = c->summary->sum_buf; | |
690 | ||
691 | while (c->summary->sum_num) { | |
20ffdcb0 | 692 | temp = c->summary->sum_list_head; |
e631ddba | 693 | |
20ffdcb0 | 694 | switch (je16_to_cpu(temp->u.nodetype)) { |
e631ddba FH |
695 | case JFFS2_NODETYPE_INODE: { |
696 | struct jffs2_sum_inode_flash *sino_ptr = wpage; | |
697 | ||
20ffdcb0 JJ |
698 | sino_ptr->nodetype = temp->i.nodetype; |
699 | sino_ptr->inode = temp->i.inode; | |
700 | sino_ptr->version = temp->i.version; | |
701 | sino_ptr->offset = temp->i.offset; | |
702 | sino_ptr->totlen = temp->i.totlen; | |
e631ddba FH |
703 | |
704 | wpage += JFFS2_SUMMARY_INODE_SIZE; | |
705 | ||
706 | break; | |
707 | } | |
708 | ||
709 | case JFFS2_NODETYPE_DIRENT: { | |
710 | struct jffs2_sum_dirent_flash *sdrnt_ptr = wpage; | |
711 | ||
20ffdcb0 JJ |
712 | sdrnt_ptr->nodetype = temp->d.nodetype; |
713 | sdrnt_ptr->totlen = temp->d.totlen; | |
714 | sdrnt_ptr->offset = temp->d.offset; | |
715 | sdrnt_ptr->pino = temp->d.pino; | |
716 | sdrnt_ptr->version = temp->d.version; | |
717 | sdrnt_ptr->ino = temp->d.ino; | |
718 | sdrnt_ptr->nsize = temp->d.nsize; | |
719 | sdrnt_ptr->type = temp->d.type; | |
e631ddba | 720 | |
20ffdcb0 JJ |
721 | memcpy(sdrnt_ptr->name, temp->d.name, |
722 | temp->d.nsize); | |
e631ddba | 723 | |
20ffdcb0 | 724 | wpage += JFFS2_SUMMARY_DIRENT_SIZE(temp->d.nsize); |
e631ddba FH |
725 | |
726 | break; | |
727 | } | |
aa98d7cf KK |
728 | #ifdef CONFIG_JFFS2_FS_XATTR |
729 | case JFFS2_NODETYPE_XATTR: { | |
730 | struct jffs2_sum_xattr_flash *sxattr_ptr = wpage; | |
731 | ||
732 | temp = c->summary->sum_list_head; | |
733 | sxattr_ptr->nodetype = temp->x.nodetype; | |
734 | sxattr_ptr->xid = temp->x.xid; | |
735 | sxattr_ptr->version = temp->x.version; | |
736 | sxattr_ptr->offset = temp->x.offset; | |
737 | sxattr_ptr->totlen = temp->x.totlen; | |
738 | ||
739 | wpage += JFFS2_SUMMARY_XATTR_SIZE; | |
740 | break; | |
741 | } | |
742 | case JFFS2_NODETYPE_XREF: { | |
743 | struct jffs2_sum_xref_flash *sxref_ptr = wpage; | |
744 | ||
745 | temp = c->summary->sum_list_head; | |
746 | sxref_ptr->nodetype = temp->r.nodetype; | |
747 | sxref_ptr->offset = temp->r.offset; | |
e631ddba | 748 | |
aa98d7cf KK |
749 | wpage += JFFS2_SUMMARY_XREF_SIZE; |
750 | break; | |
751 | } | |
752 | #endif | |
e631ddba | 753 | default : { |
6171586a DW |
754 | if ((je16_to_cpu(temp->u.nodetype) & JFFS2_COMPAT_MASK) |
755 | == JFFS2_FEATURE_RWCOMPAT_COPY) { | |
756 | dbg_summary("Writing unknown RWCOMPAT_COPY node type %x\n", | |
757 | je16_to_cpu(temp->u.nodetype)); | |
758 | jffs2_sum_disable_collecting(c->summary); | |
759 | } else { | |
760 | BUG(); /* unknown node in summary information */ | |
761 | } | |
e631ddba FH |
762 | } |
763 | } | |
764 | ||
20ffdcb0 | 765 | c->summary->sum_list_head = temp->u.next; |
e631ddba FH |
766 | kfree(temp); |
767 | ||
768 | c->summary->sum_num--; | |
769 | } | |
770 | ||
771 | jffs2_sum_reset_collected(c->summary); | |
772 | ||
773 | wpage += padsize; | |
774 | ||
775 | sm = wpage; | |
776 | sm->offset = cpu_to_je32(c->sector_size - jeb->free_size); | |
777 | sm->magic = cpu_to_je32(JFFS2_SUM_MAGIC); | |
778 | ||
779 | isum.sum_crc = cpu_to_je32(crc32(0, c->summary->sum_buf, datasize)); | |
780 | isum.node_crc = cpu_to_je32(crc32(0, &isum, sizeof(isum) - 8)); | |
781 | ||
782 | vecs[0].iov_base = &isum; | |
783 | vecs[0].iov_len = sizeof(isum); | |
784 | vecs[1].iov_base = c->summary->sum_buf; | |
785 | vecs[1].iov_len = datasize; | |
786 | ||
2f785402 DW |
787 | sum_ofs = jeb->offset + c->sector_size - jeb->free_size; |
788 | ||
733802d9 | 789 | dbg_summary("JFFS2: writing out data to flash to pos : 0x%08x\n", |
2f785402 | 790 | sum_ofs); |
e631ddba | 791 | |
2f785402 | 792 | ret = jffs2_flash_writev(c, vecs, 2, sum_ofs, &retlen, 0); |
e631ddba FH |
793 | |
794 | if (ret || (retlen != infosize)) { | |
010b06d6 | 795 | |
c41ff6e5 | 796 | JFFS2_WARNING("Write of %u bytes at 0x%08x failed. returned %d, retlen %zd\n", |
2f785402 | 797 | infosize, sum_ofs, ret, retlen); |
e631ddba | 798 | |
9bfeb691 DW |
799 | if (retlen) { |
800 | /* Waste remaining space */ | |
801 | spin_lock(&c->erase_completion_lock); | |
802 | jffs2_link_node_ref(c, jeb, sum_ofs | REF_OBSOLETE, infosize, NULL); | |
803 | spin_unlock(&c->erase_completion_lock); | |
804 | } | |
010b06d6 | 805 | |
e631ddba | 806 | c->summary->sum_size = JFFS2_SUMMARY_NOSUM_SIZE; |
e631ddba | 807 | |
2f785402 | 808 | return 0; |
e631ddba FH |
809 | } |
810 | ||
010b06d6 | 811 | spin_lock(&c->erase_completion_lock); |
2f785402 DW |
812 | jffs2_link_node_ref(c, jeb, sum_ofs | REF_NORMAL, infosize, NULL); |
813 | spin_unlock(&c->erase_completion_lock); | |
010b06d6 | 814 | |
e631ddba FH |
815 | return 0; |
816 | } | |
817 | ||
818 | /* Write out summary information - called from jffs2_do_reserve_space */ | |
819 | ||
820 | int jffs2_sum_write_sumnode(struct jffs2_sb_info *c) | |
821 | { | |
2f785402 | 822 | int datasize, infosize, padsize; |
e631ddba | 823 | struct jffs2_eraseblock *jeb; |
2f785402 | 824 | int ret; |
e631ddba | 825 | |
733802d9 | 826 | dbg_summary("called\n"); |
e631ddba | 827 | |
2f785402 | 828 | spin_unlock(&c->erase_completion_lock); |
2f785402 | 829 | |
e631ddba | 830 | jeb = c->nextblock; |
046b8b98 | 831 | jffs2_prealloc_raw_node_refs(c, jeb, 1); |
e631ddba FH |
832 | |
833 | if (!c->summary->sum_num || !c->summary->sum_list_head) { | |
834 | JFFS2_WARNING("Empty summary info!!!\n"); | |
835 | BUG(); | |
836 | } | |
837 | ||
838 | datasize = c->summary->sum_size + sizeof(struct jffs2_sum_marker); | |
2bc9764c | 839 | infosize = sizeof(struct jffs2_raw_summary) + datasize; |
e631ddba | 840 | padsize = jeb->free_size - infosize; |
182ec4ee | 841 | infosize += padsize; |
e631ddba FH |
842 | datasize += padsize; |
843 | ||
844 | /* Is there enough space for summary? */ | |
845 | if (padsize < 0) { | |
846 | /* don't try to write out summary for this jeb */ | |
847 | jffs2_sum_disable_collecting(c->summary); | |
848 | ||
849 | JFFS2_WARNING("Not enough space for summary, padsize = %d\n", padsize); | |
9bfeb691 | 850 | spin_lock(&c->erase_completion_lock); |
e631ddba FH |
851 | return 0; |
852 | } | |
853 | ||
854 | ret = jffs2_sum_write_data(c, jeb, infosize, datasize, padsize); | |
010b06d6 | 855 | spin_lock(&c->erase_completion_lock); |
2f785402 | 856 | return ret; |
e631ddba | 857 | } |