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e631ddba FH |
1 | /* |
2 | * JFFS2 -- Journalling Flash File System, Version 2. | |
3 | * | |
4 | * Copyright (C) 2004 Ferenc Havasi <havasi@inf.u-szeged.hu>, | |
5 | * Zoltan Sogor <weth@inf.u-szeged.hu>, | |
6 | * Patrik Kluba <pajko@halom.u-szeged.hu>, | |
7 | * University of Szeged, Hungary | |
332a6b99 | 8 | * 2006 KaiGai Kohei <kaigai@ak.jp.nec.com> |
e631ddba FH |
9 | * |
10 | * For licensing information, see the file 'LICENCE' in this directory. | |
11 | * | |
2bc9764c | 12 | * $Id: summary.c,v 1.4 2005/09/26 11:37:21 havasi Exp $ |
e631ddba FH |
13 | * |
14 | */ | |
15 | ||
16 | #include <linux/kernel.h> | |
17 | #include <linux/sched.h> | |
18 | #include <linux/slab.h> | |
19 | #include <linux/mtd/mtd.h> | |
20 | #include <linux/pagemap.h> | |
21 | #include <linux/crc32.h> | |
22 | #include <linux/compiler.h> | |
23 | #include <linux/vmalloc.h> | |
24 | #include "nodelist.h" | |
25 | #include "debug.h" | |
26 | ||
27 | int jffs2_sum_init(struct jffs2_sb_info *c) | |
28 | { | |
29 | c->summary = kmalloc(sizeof(struct jffs2_summary), GFP_KERNEL); | |
30 | ||
31 | if (!c->summary) { | |
32 | JFFS2_WARNING("Can't allocate memory for summary information!\n"); | |
33 | return -ENOMEM; | |
34 | } | |
35 | ||
36 | memset(c->summary, 0, sizeof(struct jffs2_summary)); | |
37 | ||
38 | c->summary->sum_buf = vmalloc(c->sector_size); | |
39 | ||
40 | if (!c->summary->sum_buf) { | |
41 | JFFS2_WARNING("Can't allocate buffer for writing out summary information!\n"); | |
733802d9 | 42 | kfree(c->summary); |
e631ddba FH |
43 | return -ENOMEM; |
44 | } | |
45 | ||
d6e05edc | 46 | dbg_summary("returned successfully\n"); |
e631ddba FH |
47 | |
48 | return 0; | |
49 | } | |
50 | ||
51 | void jffs2_sum_exit(struct jffs2_sb_info *c) | |
52 | { | |
733802d9 | 53 | dbg_summary("called\n"); |
e631ddba FH |
54 | |
55 | jffs2_sum_disable_collecting(c->summary); | |
56 | ||
57 | vfree(c->summary->sum_buf); | |
58 | c->summary->sum_buf = NULL; | |
59 | ||
60 | kfree(c->summary); | |
61 | c->summary = NULL; | |
62 | } | |
63 | ||
64 | static int jffs2_sum_add_mem(struct jffs2_summary *s, union jffs2_sum_mem *item) | |
65 | { | |
66 | if (!s->sum_list_head) | |
67 | s->sum_list_head = (union jffs2_sum_mem *) item; | |
68 | if (s->sum_list_tail) | |
69 | s->sum_list_tail->u.next = (union jffs2_sum_mem *) item; | |
70 | s->sum_list_tail = (union jffs2_sum_mem *) item; | |
71 | ||
72 | switch (je16_to_cpu(item->u.nodetype)) { | |
73 | case JFFS2_NODETYPE_INODE: | |
74 | s->sum_size += JFFS2_SUMMARY_INODE_SIZE; | |
75 | s->sum_num++; | |
733802d9 | 76 | dbg_summary("inode (%u) added to summary\n", |
e631ddba FH |
77 | je32_to_cpu(item->i.inode)); |
78 | break; | |
79 | case JFFS2_NODETYPE_DIRENT: | |
80 | s->sum_size += JFFS2_SUMMARY_DIRENT_SIZE(item->d.nsize); | |
81 | s->sum_num++; | |
733802d9 | 82 | dbg_summary("dirent (%u) added to summary\n", |
e631ddba FH |
83 | je32_to_cpu(item->d.ino)); |
84 | break; | |
aa98d7cf KK |
85 | #ifdef CONFIG_JFFS2_FS_XATTR |
86 | case JFFS2_NODETYPE_XATTR: | |
87 | s->sum_size += JFFS2_SUMMARY_XATTR_SIZE; | |
88 | s->sum_num++; | |
89 | dbg_summary("xattr (xid=%u, version=%u) added to summary\n", | |
90 | je32_to_cpu(item->x.xid), je32_to_cpu(item->x.version)); | |
91 | break; | |
92 | case JFFS2_NODETYPE_XREF: | |
93 | s->sum_size += JFFS2_SUMMARY_XREF_SIZE; | |
94 | s->sum_num++; | |
95 | dbg_summary("xref added to summary\n"); | |
96 | break; | |
97 | #endif | |
e631ddba | 98 | default: |
182ec4ee | 99 | JFFS2_WARNING("UNKNOWN node type %u\n", |
e631ddba FH |
100 | je16_to_cpu(item->u.nodetype)); |
101 | return 1; | |
102 | } | |
103 | return 0; | |
104 | } | |
105 | ||
106 | ||
107 | /* The following 3 functions are called from scan.c to collect summary info for not closed jeb */ | |
108 | ||
109 | int jffs2_sum_add_padding_mem(struct jffs2_summary *s, uint32_t size) | |
110 | { | |
733802d9 | 111 | dbg_summary("called with %u\n", size); |
e631ddba FH |
112 | s->sum_padded += size; |
113 | return 0; | |
114 | } | |
115 | ||
116 | int jffs2_sum_add_inode_mem(struct jffs2_summary *s, struct jffs2_raw_inode *ri, | |
117 | uint32_t ofs) | |
118 | { | |
119 | struct jffs2_sum_inode_mem *temp = kmalloc(sizeof(struct jffs2_sum_inode_mem), GFP_KERNEL); | |
120 | ||
121 | if (!temp) | |
122 | return -ENOMEM; | |
123 | ||
124 | temp->nodetype = ri->nodetype; | |
125 | temp->inode = ri->ino; | |
126 | temp->version = ri->version; | |
127 | temp->offset = cpu_to_je32(ofs); /* relative offset from the begining of the jeb */ | |
128 | temp->totlen = ri->totlen; | |
129 | temp->next = NULL; | |
130 | ||
131 | return jffs2_sum_add_mem(s, (union jffs2_sum_mem *)temp); | |
132 | } | |
133 | ||
134 | int jffs2_sum_add_dirent_mem(struct jffs2_summary *s, struct jffs2_raw_dirent *rd, | |
135 | uint32_t ofs) | |
136 | { | |
137 | struct jffs2_sum_dirent_mem *temp = | |
138 | kmalloc(sizeof(struct jffs2_sum_dirent_mem) + rd->nsize, GFP_KERNEL); | |
139 | ||
140 | if (!temp) | |
141 | return -ENOMEM; | |
142 | ||
143 | temp->nodetype = rd->nodetype; | |
144 | temp->totlen = rd->totlen; | |
145 | temp->offset = cpu_to_je32(ofs); /* relative from the begining of the jeb */ | |
146 | temp->pino = rd->pino; | |
147 | temp->version = rd->version; | |
148 | temp->ino = rd->ino; | |
149 | temp->nsize = rd->nsize; | |
150 | temp->type = rd->type; | |
151 | temp->next = NULL; | |
152 | ||
153 | memcpy(temp->name, rd->name, rd->nsize); | |
154 | ||
155 | return jffs2_sum_add_mem(s, (union jffs2_sum_mem *)temp); | |
156 | } | |
157 | ||
aa98d7cf KK |
158 | #ifdef CONFIG_JFFS2_FS_XATTR |
159 | int jffs2_sum_add_xattr_mem(struct jffs2_summary *s, struct jffs2_raw_xattr *rx, uint32_t ofs) | |
160 | { | |
161 | struct jffs2_sum_xattr_mem *temp; | |
162 | ||
163 | temp = kmalloc(sizeof(struct jffs2_sum_xattr_mem), GFP_KERNEL); | |
164 | if (!temp) | |
165 | return -ENOMEM; | |
166 | ||
167 | temp->nodetype = rx->nodetype; | |
168 | temp->xid = rx->xid; | |
169 | temp->version = rx->version; | |
170 | temp->offset = cpu_to_je32(ofs); | |
171 | temp->totlen = rx->totlen; | |
172 | temp->next = NULL; | |
173 | ||
174 | return jffs2_sum_add_mem(s, (union jffs2_sum_mem *)temp); | |
175 | } | |
176 | ||
177 | int jffs2_sum_add_xref_mem(struct jffs2_summary *s, struct jffs2_raw_xref *rr, uint32_t ofs) | |
178 | { | |
179 | struct jffs2_sum_xref_mem *temp; | |
180 | ||
181 | temp = kmalloc(sizeof(struct jffs2_sum_xref_mem), GFP_KERNEL); | |
182 | if (!temp) | |
183 | return -ENOMEM; | |
184 | ||
185 | temp->nodetype = rr->nodetype; | |
186 | temp->offset = cpu_to_je32(ofs); | |
187 | temp->next = NULL; | |
188 | ||
189 | return jffs2_sum_add_mem(s, (union jffs2_sum_mem *)temp); | |
190 | } | |
191 | #endif | |
e631ddba FH |
192 | /* Cleanup every collected summary information */ |
193 | ||
194 | static void jffs2_sum_clean_collected(struct jffs2_summary *s) | |
195 | { | |
196 | union jffs2_sum_mem *temp; | |
197 | ||
198 | if (!s->sum_list_head) { | |
733802d9 | 199 | dbg_summary("already empty\n"); |
e631ddba FH |
200 | } |
201 | while (s->sum_list_head) { | |
202 | temp = s->sum_list_head; | |
203 | s->sum_list_head = s->sum_list_head->u.next; | |
204 | kfree(temp); | |
205 | } | |
206 | s->sum_list_tail = NULL; | |
207 | s->sum_padded = 0; | |
208 | s->sum_num = 0; | |
209 | } | |
210 | ||
211 | void jffs2_sum_reset_collected(struct jffs2_summary *s) | |
212 | { | |
733802d9 | 213 | dbg_summary("called\n"); |
e631ddba FH |
214 | jffs2_sum_clean_collected(s); |
215 | s->sum_size = 0; | |
216 | } | |
217 | ||
218 | void jffs2_sum_disable_collecting(struct jffs2_summary *s) | |
219 | { | |
733802d9 | 220 | dbg_summary("called\n"); |
e631ddba FH |
221 | jffs2_sum_clean_collected(s); |
222 | s->sum_size = JFFS2_SUMMARY_NOSUM_SIZE; | |
223 | } | |
224 | ||
182ec4ee | 225 | int jffs2_sum_is_disabled(struct jffs2_summary *s) |
e631ddba FH |
226 | { |
227 | return (s->sum_size == JFFS2_SUMMARY_NOSUM_SIZE); | |
228 | } | |
229 | ||
230 | /* Move the collected summary information into sb (called from scan.c) */ | |
231 | ||
232 | void jffs2_sum_move_collected(struct jffs2_sb_info *c, struct jffs2_summary *s) | |
233 | { | |
733802d9 | 234 | dbg_summary("oldsize=0x%x oldnum=%u => newsize=0x%x newnum=%u\n", |
e631ddba FH |
235 | c->summary->sum_size, c->summary->sum_num, |
236 | s->sum_size, s->sum_num); | |
237 | ||
238 | c->summary->sum_size = s->sum_size; | |
239 | c->summary->sum_num = s->sum_num; | |
240 | c->summary->sum_padded = s->sum_padded; | |
241 | c->summary->sum_list_head = s->sum_list_head; | |
242 | c->summary->sum_list_tail = s->sum_list_tail; | |
243 | ||
244 | s->sum_list_head = s->sum_list_tail = NULL; | |
245 | } | |
246 | ||
247 | /* Called from wbuf.c to collect writed node info */ | |
248 | ||
249 | int jffs2_sum_add_kvec(struct jffs2_sb_info *c, const struct kvec *invecs, | |
250 | unsigned long count, uint32_t ofs) | |
251 | { | |
252 | union jffs2_node_union *node; | |
253 | struct jffs2_eraseblock *jeb; | |
254 | ||
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 | |
2f785402 | 396 | /* Make sure there's a spare ref for dirty space */ |
046b8b98 | 397 | err = jffs2_prealloc_raw_node_refs(c, jeb, 2); |
2f785402 DW |
398 | if (err) |
399 | return err; | |
400 | ||
e631ddba FH |
401 | switch (je16_to_cpu(((struct jffs2_sum_unknown_flash *)sp)->nodetype)) { |
402 | case JFFS2_NODETYPE_INODE: { | |
403 | struct jffs2_sum_inode_flash *spi; | |
404 | spi = sp; | |
405 | ||
406 | ino = je32_to_cpu(spi->inode); | |
407 | ||
9167e0f8 DW |
408 | dbg_summary("Inode at 0x%08x-0x%08x\n", |
409 | jeb->offset + je32_to_cpu(spi->offset), | |
8b9e9fe8 | 410 | jeb->offset + je32_to_cpu(spi->offset) + je32_to_cpu(spi->totlen)); |
e631ddba | 411 | |
e631ddba FH |
412 | ic = jffs2_scan_make_ino_cache(c, ino); |
413 | if (!ic) { | |
414 | JFFS2_NOTICE("scan_make_ino_cache failed\n"); | |
e631ddba FH |
415 | return -ENOMEM; |
416 | } | |
417 | ||
2f785402 DW |
418 | sum_link_node_ref(c, jeb, je32_to_cpu(spi->offset) | REF_UNCHECKED, |
419 | PAD(je32_to_cpu(spi->totlen)), ic); | |
f1f9671b DW |
420 | |
421 | *pseudo_random += je32_to_cpu(spi->version); | |
e631ddba FH |
422 | |
423 | sp += JFFS2_SUMMARY_INODE_SIZE; | |
424 | ||
425 | break; | |
426 | } | |
427 | ||
428 | case JFFS2_NODETYPE_DIRENT: { | |
429 | struct jffs2_sum_dirent_flash *spd; | |
430 | spd = sp; | |
431 | ||
8b9e9fe8 | 432 | dbg_summary("Dirent at 0x%08x-0x%08x\n", |
9167e0f8 DW |
433 | jeb->offset + je32_to_cpu(spd->offset), |
434 | jeb->offset + je32_to_cpu(spd->offset) + je32_to_cpu(spd->totlen)); | |
435 | ||
e631ddba FH |
436 | |
437 | fd = jffs2_alloc_full_dirent(spd->nsize+1); | |
9641b784 | 438 | if (!fd) |
e631ddba | 439 | return -ENOMEM; |
e631ddba FH |
440 | |
441 | memcpy(&fd->name, spd->name, spd->nsize); | |
442 | fd->name[spd->nsize] = 0; | |
443 | ||
e631ddba FH |
444 | ic = jffs2_scan_make_ino_cache(c, je32_to_cpu(spd->pino)); |
445 | if (!ic) { | |
446 | jffs2_free_full_dirent(fd); | |
e631ddba FH |
447 | return -ENOMEM; |
448 | } | |
449 | ||
1046d880 | 450 | fd->raw = sum_link_node_ref(c, jeb, je32_to_cpu(spd->offset) | REF_UNCHECKED, |
2f785402 | 451 | PAD(je32_to_cpu(spd->totlen)), ic); |
e631ddba | 452 | |
e631ddba FH |
453 | fd->next = NULL; |
454 | fd->version = je32_to_cpu(spd->version); | |
455 | fd->ino = je32_to_cpu(spd->ino); | |
456 | fd->nhash = full_name_hash(fd->name, spd->nsize); | |
457 | fd->type = spd->type; | |
f1f9671b | 458 | |
e631ddba FH |
459 | jffs2_add_fd_to_list(c, fd, &ic->scan_dents); |
460 | ||
461 | *pseudo_random += je32_to_cpu(spd->version); | |
462 | ||
463 | sp += JFFS2_SUMMARY_DIRENT_SIZE(spd->nsize); | |
464 | ||
465 | break; | |
466 | } | |
aa98d7cf KK |
467 | #ifdef CONFIG_JFFS2_FS_XATTR |
468 | case JFFS2_NODETYPE_XATTR: { | |
469 | struct jffs2_xattr_datum *xd; | |
470 | struct jffs2_sum_xattr_flash *spx; | |
aa98d7cf KK |
471 | |
472 | spx = (struct jffs2_sum_xattr_flash *)sp; | |
9167e0f8 | 473 | dbg_summary("xattr at %#08x-%#08x (xid=%u, version=%u)\n", |
49f11d40 | 474 | jeb->offset + je32_to_cpu(spx->offset), |
9167e0f8 | 475 | jeb->offset + je32_to_cpu(spx->offset) + je32_to_cpu(spx->totlen), |
aa98d7cf | 476 | je32_to_cpu(spx->xid), je32_to_cpu(spx->version)); |
2f785402 | 477 | |
aa98d7cf KK |
478 | xd = jffs2_setup_xattr_datum(c, je32_to_cpu(spx->xid), |
479 | je32_to_cpu(spx->version)); | |
c9f700f8 | 480 | if (IS_ERR(xd)) |
aa98d7cf | 481 | return PTR_ERR(xd); |
c9f700f8 KK |
482 | if (xd->version > je32_to_cpu(spx->version)) { |
483 | /* node is not the newest one */ | |
484 | struct jffs2_raw_node_ref *raw | |
485 | = sum_link_node_ref(c, jeb, je32_to_cpu(spx->offset) | REF_UNCHECKED, | |
486 | PAD(je32_to_cpu(spx->totlen)), NULL); | |
487 | raw->next_in_ino = xd->node->next_in_ino; | |
488 | xd->node->next_in_ino = raw; | |
489 | } else { | |
490 | xd->version = je32_to_cpu(spx->version); | |
491 | sum_link_node_ref(c, jeb, je32_to_cpu(spx->offset) | REF_UNCHECKED, | |
492 | PAD(je32_to_cpu(spx->totlen)), (void *)xd); | |
aa98d7cf | 493 | } |
aa98d7cf | 494 | *pseudo_random += je32_to_cpu(spx->xid); |
aa98d7cf KK |
495 | sp += JFFS2_SUMMARY_XATTR_SIZE; |
496 | ||
497 | break; | |
498 | } | |
499 | case JFFS2_NODETYPE_XREF: { | |
500 | struct jffs2_xattr_ref *ref; | |
501 | struct jffs2_sum_xref_flash *spr; | |
aa98d7cf KK |
502 | |
503 | spr = (struct jffs2_sum_xref_flash *)sp; | |
9167e0f8 | 504 | dbg_summary("xref at %#08x-%#08x\n", |
49f11d40 | 505 | jeb->offset + je32_to_cpu(spr->offset), |
9bfeb691 DW |
506 | jeb->offset + je32_to_cpu(spr->offset) + |
507 | (uint32_t)PAD(sizeof(struct jffs2_raw_xref))); | |
9167e0f8 | 508 | |
aa98d7cf KK |
509 | ref = jffs2_alloc_xattr_ref(); |
510 | if (!ref) { | |
511 | JFFS2_NOTICE("allocation of xattr_datum failed\n"); | |
aa98d7cf KK |
512 | return -ENOMEM; |
513 | } | |
8f2b6f49 KK |
514 | ref->next = c->xref_temp; |
515 | c->xref_temp = ref; | |
aa98d7cf | 516 | |
c9f700f8 KK |
517 | sum_link_node_ref(c, jeb, je32_to_cpu(spr->offset) | REF_UNCHECKED, |
518 | PAD(sizeof(struct jffs2_raw_xref)), (void *)ref); | |
aa98d7cf | 519 | |
2f785402 | 520 | *pseudo_random += ref->node->flash_offset; |
aa98d7cf | 521 | sp += JFFS2_SUMMARY_XREF_SIZE; |
e631ddba | 522 | |
aa98d7cf KK |
523 | break; |
524 | } | |
525 | #endif | |
e631ddba | 526 | default : { |
7807ef7b DW |
527 | uint16_t nodetype = je16_to_cpu(((struct jffs2_sum_unknown_flash *)sp)->nodetype); |
528 | JFFS2_WARNING("Unsupported node type %x found in summary! Exiting...\n", nodetype); | |
529 | if ((nodetype & JFFS2_COMPAT_MASK) == JFFS2_FEATURE_INCOMPAT) | |
530 | return -EIO; | |
531 | ||
532 | /* For compatible node types, just fall back to the full scan */ | |
533 | c->wasted_size -= jeb->wasted_size; | |
534 | c->free_size += c->sector_size - jeb->free_size; | |
535 | c->used_size -= jeb->used_size; | |
536 | c->dirty_size -= jeb->dirty_size; | |
537 | jeb->wasted_size = jeb->used_size = jeb->dirty_size = 0; | |
538 | jeb->free_size = c->sector_size; | |
539 | ||
c38c1b61 | 540 | jffs2_free_jeb_node_refs(c, jeb); |
7807ef7b | 541 | return -ENOTRECOVERABLE; |
e631ddba FH |
542 | } |
543 | } | |
544 | } | |
e631ddba FH |
545 | return 0; |
546 | } | |
547 | ||
548 | /* Process the summary node - called from jffs2_scan_eraseblock() */ | |
e631ddba | 549 | int jffs2_sum_scan_sumnode(struct jffs2_sb_info *c, struct jffs2_eraseblock *jeb, |
9641b784 DW |
550 | struct jffs2_raw_summary *summary, uint32_t sumsize, |
551 | uint32_t *pseudo_random) | |
e631ddba FH |
552 | { |
553 | struct jffs2_unknown_node crcnode; | |
9641b784 | 554 | int ret, ofs; |
e631ddba FH |
555 | uint32_t crc; |
556 | ||
49f11d40 | 557 | ofs = c->sector_size - sumsize; |
e631ddba | 558 | |
733802d9 | 559 | dbg_summary("summary found for 0x%08x at 0x%08x (0x%x bytes)\n", |
49f11d40 | 560 | jeb->offset, jeb->offset + ofs, sumsize); |
e631ddba FH |
561 | |
562 | /* OK, now check for node validity and CRC */ | |
563 | crcnode.magic = cpu_to_je16(JFFS2_MAGIC_BITMASK); | |
564 | crcnode.nodetype = cpu_to_je16(JFFS2_NODETYPE_SUMMARY); | |
565 | crcnode.totlen = summary->totlen; | |
566 | crc = crc32(0, &crcnode, sizeof(crcnode)-4); | |
567 | ||
568 | if (je32_to_cpu(summary->hdr_crc) != crc) { | |
733802d9 | 569 | dbg_summary("Summary node header is corrupt (bad CRC or " |
e631ddba FH |
570 | "no summary at all)\n"); |
571 | goto crc_err; | |
572 | } | |
573 | ||
574 | if (je32_to_cpu(summary->totlen) != sumsize) { | |
733802d9 | 575 | dbg_summary("Summary node is corrupt (wrong erasesize?)\n"); |
e631ddba FH |
576 | goto crc_err; |
577 | } | |
578 | ||
2bc9764c | 579 | crc = crc32(0, summary, sizeof(struct jffs2_raw_summary)-8); |
e631ddba FH |
580 | |
581 | if (je32_to_cpu(summary->node_crc) != crc) { | |
733802d9 | 582 | dbg_summary("Summary node is corrupt (bad CRC)\n"); |
e631ddba FH |
583 | goto crc_err; |
584 | } | |
585 | ||
2bc9764c | 586 | crc = crc32(0, summary->sum, sumsize - sizeof(struct jffs2_raw_summary)); |
e631ddba FH |
587 | |
588 | if (je32_to_cpu(summary->sum_crc) != crc) { | |
733802d9 | 589 | dbg_summary("Summary node data is corrupt (bad CRC)\n"); |
e631ddba FH |
590 | goto crc_err; |
591 | } | |
592 | ||
593 | if ( je32_to_cpu(summary->cln_mkr) ) { | |
594 | ||
733802d9 | 595 | dbg_summary("Summary : CLEANMARKER node \n"); |
e631ddba | 596 | |
098a1981 DW |
597 | ret = jffs2_prealloc_raw_node_refs(c, jeb, 1); |
598 | if (ret) | |
599 | return ret; | |
600 | ||
e631ddba | 601 | if (je32_to_cpu(summary->cln_mkr) != c->cleanmarker_size) { |
733802d9 | 602 | dbg_summary("CLEANMARKER node has totlen 0x%x != normal 0x%x\n", |
e631ddba | 603 | je32_to_cpu(summary->cln_mkr), c->cleanmarker_size); |
098a1981 DW |
604 | if ((ret = jffs2_scan_dirty_space(c, jeb, PAD(je32_to_cpu(summary->cln_mkr))))) |
605 | return ret; | |
e631ddba | 606 | } else if (jeb->first_node) { |
733802d9 | 607 | dbg_summary("CLEANMARKER node not first node in block " |
e631ddba | 608 | "(0x%08x)\n", jeb->offset); |
098a1981 DW |
609 | if ((ret = jffs2_scan_dirty_space(c, jeb, PAD(je32_to_cpu(summary->cln_mkr))))) |
610 | return ret; | |
e631ddba | 611 | } else { |
2f785402 DW |
612 | jffs2_link_node_ref(c, jeb, jeb->offset | REF_NORMAL, |
613 | je32_to_cpu(summary->cln_mkr), NULL); | |
e631ddba FH |
614 | } |
615 | } | |
616 | ||
e631ddba | 617 | ret = jffs2_sum_process_sum_data(c, jeb, summary, pseudo_random); |
7807ef7b DW |
618 | /* -ENOTRECOVERABLE isn't a fatal error -- it means we should do a full |
619 | scan of this eraseblock. So return zero */ | |
620 | if (ret == -ENOTRECOVERABLE) | |
621 | return 0; | |
e631ddba | 622 | if (ret) |
7807ef7b | 623 | return ret; /* real error */ |
e631ddba FH |
624 | |
625 | /* for PARANOIA_CHECK */ | |
046b8b98 | 626 | ret = jffs2_prealloc_raw_node_refs(c, jeb, 2); |
2f785402 DW |
627 | if (ret) |
628 | return ret; | |
e631ddba | 629 | |
f61579c3 | 630 | sum_link_node_ref(c, jeb, ofs | REF_NORMAL, sumsize, NULL); |
e631ddba | 631 | |
49f11d40 DW |
632 | if (unlikely(jeb->free_size)) { |
633 | JFFS2_WARNING("Free size 0x%x bytes in eraseblock @0x%08x with summary?\n", | |
634 | jeb->free_size, jeb->offset); | |
635 | jeb->wasted_size += jeb->free_size; | |
636 | c->wasted_size += jeb->free_size; | |
637 | c->free_size -= jeb->free_size; | |
638 | jeb->free_size = 0; | |
639 | } | |
e631ddba FH |
640 | |
641 | return jffs2_scan_classify_jeb(c, jeb); | |
642 | ||
643 | crc_err: | |
644 | JFFS2_WARNING("Summary node crc error, skipping summary information.\n"); | |
645 | ||
646 | return 0; | |
647 | } | |
648 | ||
649 | /* Write summary data to flash - helper function for jffs2_sum_write_sumnode() */ | |
650 | ||
651 | static int jffs2_sum_write_data(struct jffs2_sb_info *c, struct jffs2_eraseblock *jeb, | |
652 | uint32_t infosize, uint32_t datasize, int padsize) | |
653 | { | |
2bc9764c | 654 | struct jffs2_raw_summary isum; |
e631ddba FH |
655 | union jffs2_sum_mem *temp; |
656 | struct jffs2_sum_marker *sm; | |
657 | struct kvec vecs[2]; | |
2f785402 | 658 | uint32_t sum_ofs; |
e631ddba FH |
659 | void *wpage; |
660 | int ret; | |
661 | size_t retlen; | |
662 | ||
663 | memset(c->summary->sum_buf, 0xff, datasize); | |
664 | memset(&isum, 0, sizeof(isum)); | |
665 | ||
666 | isum.magic = cpu_to_je16(JFFS2_MAGIC_BITMASK); | |
667 | isum.nodetype = cpu_to_je16(JFFS2_NODETYPE_SUMMARY); | |
668 | isum.totlen = cpu_to_je32(infosize); | |
669 | isum.hdr_crc = cpu_to_je32(crc32(0, &isum, sizeof(struct jffs2_unknown_node) - 4)); | |
670 | isum.padded = cpu_to_je32(c->summary->sum_padded); | |
671 | isum.cln_mkr = cpu_to_je32(c->cleanmarker_size); | |
672 | isum.sum_num = cpu_to_je32(c->summary->sum_num); | |
673 | wpage = c->summary->sum_buf; | |
674 | ||
675 | while (c->summary->sum_num) { | |
20ffdcb0 | 676 | temp = c->summary->sum_list_head; |
e631ddba | 677 | |
20ffdcb0 | 678 | switch (je16_to_cpu(temp->u.nodetype)) { |
e631ddba FH |
679 | case JFFS2_NODETYPE_INODE: { |
680 | struct jffs2_sum_inode_flash *sino_ptr = wpage; | |
681 | ||
20ffdcb0 JJ |
682 | sino_ptr->nodetype = temp->i.nodetype; |
683 | sino_ptr->inode = temp->i.inode; | |
684 | sino_ptr->version = temp->i.version; | |
685 | sino_ptr->offset = temp->i.offset; | |
686 | sino_ptr->totlen = temp->i.totlen; | |
e631ddba FH |
687 | |
688 | wpage += JFFS2_SUMMARY_INODE_SIZE; | |
689 | ||
690 | break; | |
691 | } | |
692 | ||
693 | case JFFS2_NODETYPE_DIRENT: { | |
694 | struct jffs2_sum_dirent_flash *sdrnt_ptr = wpage; | |
695 | ||
20ffdcb0 JJ |
696 | sdrnt_ptr->nodetype = temp->d.nodetype; |
697 | sdrnt_ptr->totlen = temp->d.totlen; | |
698 | sdrnt_ptr->offset = temp->d.offset; | |
699 | sdrnt_ptr->pino = temp->d.pino; | |
700 | sdrnt_ptr->version = temp->d.version; | |
701 | sdrnt_ptr->ino = temp->d.ino; | |
702 | sdrnt_ptr->nsize = temp->d.nsize; | |
703 | sdrnt_ptr->type = temp->d.type; | |
e631ddba | 704 | |
20ffdcb0 JJ |
705 | memcpy(sdrnt_ptr->name, temp->d.name, |
706 | temp->d.nsize); | |
e631ddba | 707 | |
20ffdcb0 | 708 | wpage += JFFS2_SUMMARY_DIRENT_SIZE(temp->d.nsize); |
e631ddba FH |
709 | |
710 | break; | |
711 | } | |
aa98d7cf KK |
712 | #ifdef CONFIG_JFFS2_FS_XATTR |
713 | case JFFS2_NODETYPE_XATTR: { | |
714 | struct jffs2_sum_xattr_flash *sxattr_ptr = wpage; | |
715 | ||
716 | temp = c->summary->sum_list_head; | |
717 | sxattr_ptr->nodetype = temp->x.nodetype; | |
718 | sxattr_ptr->xid = temp->x.xid; | |
719 | sxattr_ptr->version = temp->x.version; | |
720 | sxattr_ptr->offset = temp->x.offset; | |
721 | sxattr_ptr->totlen = temp->x.totlen; | |
722 | ||
723 | wpage += JFFS2_SUMMARY_XATTR_SIZE; | |
724 | break; | |
725 | } | |
726 | case JFFS2_NODETYPE_XREF: { | |
727 | struct jffs2_sum_xref_flash *sxref_ptr = wpage; | |
728 | ||
729 | temp = c->summary->sum_list_head; | |
730 | sxref_ptr->nodetype = temp->r.nodetype; | |
731 | sxref_ptr->offset = temp->r.offset; | |
e631ddba | 732 | |
aa98d7cf KK |
733 | wpage += JFFS2_SUMMARY_XREF_SIZE; |
734 | break; | |
735 | } | |
736 | #endif | |
e631ddba | 737 | default : { |
6171586a DW |
738 | if ((je16_to_cpu(temp->u.nodetype) & JFFS2_COMPAT_MASK) |
739 | == JFFS2_FEATURE_RWCOMPAT_COPY) { | |
740 | dbg_summary("Writing unknown RWCOMPAT_COPY node type %x\n", | |
741 | je16_to_cpu(temp->u.nodetype)); | |
742 | jffs2_sum_disable_collecting(c->summary); | |
743 | } else { | |
744 | BUG(); /* unknown node in summary information */ | |
745 | } | |
e631ddba FH |
746 | } |
747 | } | |
748 | ||
20ffdcb0 | 749 | c->summary->sum_list_head = temp->u.next; |
e631ddba FH |
750 | kfree(temp); |
751 | ||
752 | c->summary->sum_num--; | |
753 | } | |
754 | ||
755 | jffs2_sum_reset_collected(c->summary); | |
756 | ||
757 | wpage += padsize; | |
758 | ||
759 | sm = wpage; | |
760 | sm->offset = cpu_to_je32(c->sector_size - jeb->free_size); | |
761 | sm->magic = cpu_to_je32(JFFS2_SUM_MAGIC); | |
762 | ||
763 | isum.sum_crc = cpu_to_je32(crc32(0, c->summary->sum_buf, datasize)); | |
764 | isum.node_crc = cpu_to_je32(crc32(0, &isum, sizeof(isum) - 8)); | |
765 | ||
766 | vecs[0].iov_base = &isum; | |
767 | vecs[0].iov_len = sizeof(isum); | |
768 | vecs[1].iov_base = c->summary->sum_buf; | |
769 | vecs[1].iov_len = datasize; | |
770 | ||
2f785402 DW |
771 | sum_ofs = jeb->offset + c->sector_size - jeb->free_size; |
772 | ||
733802d9 | 773 | dbg_summary("JFFS2: writing out data to flash to pos : 0x%08x\n", |
2f785402 | 774 | sum_ofs); |
e631ddba | 775 | |
2f785402 | 776 | ret = jffs2_flash_writev(c, vecs, 2, sum_ofs, &retlen, 0); |
e631ddba FH |
777 | |
778 | if (ret || (retlen != infosize)) { | |
010b06d6 | 779 | |
c41ff6e5 | 780 | JFFS2_WARNING("Write of %u bytes at 0x%08x failed. returned %d, retlen %zd\n", |
2f785402 | 781 | infosize, sum_ofs, ret, retlen); |
e631ddba | 782 | |
9bfeb691 DW |
783 | if (retlen) { |
784 | /* Waste remaining space */ | |
785 | spin_lock(&c->erase_completion_lock); | |
786 | jffs2_link_node_ref(c, jeb, sum_ofs | REF_OBSOLETE, infosize, NULL); | |
787 | spin_unlock(&c->erase_completion_lock); | |
788 | } | |
010b06d6 | 789 | |
e631ddba | 790 | c->summary->sum_size = JFFS2_SUMMARY_NOSUM_SIZE; |
e631ddba | 791 | |
2f785402 | 792 | return 0; |
e631ddba FH |
793 | } |
794 | ||
010b06d6 | 795 | spin_lock(&c->erase_completion_lock); |
2f785402 DW |
796 | jffs2_link_node_ref(c, jeb, sum_ofs | REF_NORMAL, infosize, NULL); |
797 | spin_unlock(&c->erase_completion_lock); | |
010b06d6 | 798 | |
e631ddba FH |
799 | return 0; |
800 | } | |
801 | ||
802 | /* Write out summary information - called from jffs2_do_reserve_space */ | |
803 | ||
804 | int jffs2_sum_write_sumnode(struct jffs2_sb_info *c) | |
805 | { | |
2f785402 | 806 | int datasize, infosize, padsize; |
e631ddba | 807 | struct jffs2_eraseblock *jeb; |
2f785402 | 808 | int ret; |
e631ddba | 809 | |
733802d9 | 810 | dbg_summary("called\n"); |
e631ddba | 811 | |
2f785402 | 812 | spin_unlock(&c->erase_completion_lock); |
2f785402 | 813 | |
e631ddba | 814 | jeb = c->nextblock; |
046b8b98 | 815 | jffs2_prealloc_raw_node_refs(c, jeb, 1); |
e631ddba FH |
816 | |
817 | if (!c->summary->sum_num || !c->summary->sum_list_head) { | |
818 | JFFS2_WARNING("Empty summary info!!!\n"); | |
819 | BUG(); | |
820 | } | |
821 | ||
822 | datasize = c->summary->sum_size + sizeof(struct jffs2_sum_marker); | |
2bc9764c | 823 | infosize = sizeof(struct jffs2_raw_summary) + datasize; |
e631ddba | 824 | padsize = jeb->free_size - infosize; |
182ec4ee | 825 | infosize += padsize; |
e631ddba FH |
826 | datasize += padsize; |
827 | ||
828 | /* Is there enough space for summary? */ | |
829 | if (padsize < 0) { | |
830 | /* don't try to write out summary for this jeb */ | |
831 | jffs2_sum_disable_collecting(c->summary); | |
832 | ||
833 | JFFS2_WARNING("Not enough space for summary, padsize = %d\n", padsize); | |
9bfeb691 | 834 | spin_lock(&c->erase_completion_lock); |
e631ddba FH |
835 | return 0; |
836 | } | |
837 | ||
838 | ret = jffs2_sum_write_data(c, jeb, infosize, datasize, padsize); | |
010b06d6 | 839 | spin_lock(&c->erase_completion_lock); |
2f785402 | 840 | return ret; |
e631ddba | 841 | } |