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[JFFS2] Introduce jffs2_link_node_ref() function to reduce code duplication
[linux-2.6.22.y-op.git] / fs / jffs2 / summary.c
blob912189762323a5c35f74f8bfb1e076faea017d7a
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
8 * 2005 KaiGai Kohei <kaigai@ak.jp.nec.com>
9 *
10 * For licensing information, see the file 'LICENCE' in this directory.
11 *
12 * $Id: summary.c,v 1.4 2005/09/26 11:37:21 havasi Exp $
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");
42 kfree(c->summary);
43 return -ENOMEM;
44 }
45
46 dbg_summary("returned succesfully\n");
47
48 return 0;
49 }
50
51 void jffs2_sum_exit(struct jffs2_sb_info *c)
52 {
53 dbg_summary("called\n");
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++;
76 dbg_summary("inode (%u) added to summary\n",
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++;
82 dbg_summary("dirent (%u) added to summary\n",
83 je32_to_cpu(item->d.ino));
84 break;
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
98 default:
99 JFFS2_WARNING("UNKNOWN node type %u\n",
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 {
111 dbg_summary("called with %u\n", size);
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
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
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) {
199 dbg_summary("already empty\n");
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 {
213 dbg_summary("called\n");
214 jffs2_sum_clean_collected(s);
215 s->sum_size = 0;
216 }
217
218 void jffs2_sum_disable_collecting(struct jffs2_summary *s)
219 {
220 dbg_summary("called\n");
221 jffs2_sum_clean_collected(s);
222 s->sum_size = JFFS2_SUMMARY_NOSUM_SIZE;
223 }
224
225 int jffs2_sum_is_disabled(struct jffs2_summary *s)
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 {
234 dbg_summary("oldsize=0x%x oldnum=%u => newsize=0x%x newnum=%u\n",
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 }
310 #ifdef CONFIG_JFFS2_FS_XATTR
311 case JFFS2_NODETYPE_XATTR: {
312 struct jffs2_sum_xattr_mem *temp;
313 if (je32_to_cpu(node->x.version) == 0xffffffff)
314 return 0;
315 temp = kmalloc(sizeof(struct jffs2_sum_xattr_mem), GFP_KERNEL);
316 if (!temp)
317 goto no_mem;
318
319 temp->nodetype = node->x.nodetype;
320 temp->xid = node->x.xid;
321 temp->version = node->x.version;
322 temp->totlen = node->x.totlen;
323 temp->offset = cpu_to_je32(ofs);
324 temp->next = NULL;
325
326 return jffs2_sum_add_mem(c->summary, (union jffs2_sum_mem *)temp);
327 }
328 case JFFS2_NODETYPE_XREF: {
329 struct jffs2_sum_xref_mem *temp;
330
331 if (je32_to_cpu(node->r.ino) == 0xffffffff
332 && je32_to_cpu(node->r.xid) == 0xffffffff)
333 return 0;
334 temp = kmalloc(sizeof(struct jffs2_sum_xref_mem), GFP_KERNEL);
335 if (!temp)
336 goto no_mem;
337 temp->nodetype = node->r.nodetype;
338 temp->offset = cpu_to_je32(ofs);
339 temp->next = NULL;
340
341 return jffs2_sum_add_mem(c->summary, (union jffs2_sum_mem *)temp);
342 }
343 #endif
344 case JFFS2_NODETYPE_PADDING:
345 dbg_summary("node PADDING\n");
346 c->summary->sum_padded += je32_to_cpu(node->u.totlen);
347 break;
348
349 case JFFS2_NODETYPE_CLEANMARKER:
350 dbg_summary("node CLEANMARKER\n");
351 break;
352
353 case JFFS2_NODETYPE_SUMMARY:
354 dbg_summary("node SUMMARY\n");
355 break;
356
357 default:
358 /* If you implement a new node type you should also implement
359 summary support for it or disable summary.
360 */
361 BUG();
362 break;
363 }
364
365 return 0;
366
367 no_mem:
368 JFFS2_WARNING("MEMORY ALLOCATION ERROR!");
369 return -ENOMEM;
370 }
371
372
373 /* Process the stored summary information - helper function for jffs2_sum_scan_sumnode() */
374
375 static int jffs2_sum_process_sum_data(struct jffs2_sb_info *c, struct jffs2_eraseblock *jeb,
376 struct jffs2_raw_summary *summary, uint32_t *pseudo_random)
377 {
378 struct jffs2_raw_node_ref *raw;
379 struct jffs2_inode_cache *ic;
380 struct jffs2_full_dirent *fd;
381 void *sp;
382 int i, ino;
383
384 sp = summary->sum;
385
386 for (i=0; i<je32_to_cpu(summary->sum_num); i++) {
387 dbg_summary("processing summary index %d\n", i);
388
389 switch (je16_to_cpu(((struct jffs2_sum_unknown_flash *)sp)->nodetype)) {
390 case JFFS2_NODETYPE_INODE: {
391 struct jffs2_sum_inode_flash *spi;
392 spi = sp;
393
394 ino = je32_to_cpu(spi->inode);
395
396 dbg_summary("Inode at 0x%08x\n",
397 jeb->offset + je32_to_cpu(spi->offset));
398
399 raw = jffs2_alloc_raw_node_ref();
400 if (!raw) {
401 JFFS2_NOTICE("allocation of node reference failed\n");
402 return -ENOMEM;
403 }
404
405 ic = jffs2_scan_make_ino_cache(c, ino);
406 if (!ic) {
407 JFFS2_NOTICE("scan_make_ino_cache failed\n");
408 jffs2_free_raw_node_ref(raw);
409 return -ENOMEM;
410 }
411
412 raw->flash_offset = (jeb->offset + je32_to_cpu(spi->offset)) | REF_UNCHECKED;
413
414 raw->next_in_ino = ic->nodes;
415 ic->nodes = raw;
416
417 jffs2_link_node_ref(c, jeb, raw, PAD(je32_to_cpu(spi->totlen)));
418
419 *pseudo_random += je32_to_cpu(spi->version);
420
421 sp += JFFS2_SUMMARY_INODE_SIZE;
422
423 break;
424 }
425
426 case JFFS2_NODETYPE_DIRENT: {
427 struct jffs2_sum_dirent_flash *spd;
428 spd = sp;
429
430 dbg_summary("Dirent at 0x%08x\n",
431 jeb->offset + je32_to_cpu(spd->offset));
432
433 fd = jffs2_alloc_full_dirent(spd->nsize+1);
434 if (!fd)
435 return -ENOMEM;
436
437 memcpy(&fd->name, spd->name, spd->nsize);
438 fd->name[spd->nsize] = 0;
439
440 raw = jffs2_alloc_raw_node_ref();
441 if (!raw) {
442 jffs2_free_full_dirent(fd);
443 JFFS2_NOTICE("allocation of node reference failed\n");
444 return -ENOMEM;
445 }
446
447 ic = jffs2_scan_make_ino_cache(c, je32_to_cpu(spd->pino));
448 if (!ic) {
449 jffs2_free_full_dirent(fd);
450 jffs2_free_raw_node_ref(raw);
451 return -ENOMEM;
452 }
453
454 raw->flash_offset = (jeb->offset + je32_to_cpu(spd->offset)) | REF_PRISTINE;
455 raw->next_in_ino = ic->nodes;
456 ic->nodes = raw;
457
458 jffs2_link_node_ref(c, jeb, raw, PAD(je32_to_cpu(spd->totlen)));
459
460 fd->raw = raw;
461 fd->next = NULL;
462 fd->version = je32_to_cpu(spd->version);
463 fd->ino = je32_to_cpu(spd->ino);
464 fd->nhash = full_name_hash(fd->name, spd->nsize);
465 fd->type = spd->type;
466
467 jffs2_add_fd_to_list(c, fd, &ic->scan_dents);
468
469 *pseudo_random += je32_to_cpu(spd->version);
470
471 sp += JFFS2_SUMMARY_DIRENT_SIZE(spd->nsize);
472
473 break;
474 }
475 #ifdef CONFIG_JFFS2_FS_XATTR
476 case JFFS2_NODETYPE_XATTR: {
477 struct jffs2_xattr_datum *xd;
478 struct jffs2_sum_xattr_flash *spx;
479 uint32_t ofs;
480
481 spx = (struct jffs2_sum_xattr_flash *)sp;
482 ofs = jeb->offset + je32_to_cpu(spx->offset);
483 dbg_summary("xattr at %#08x (xid=%u, version=%u)\n", ofs,
484 je32_to_cpu(spx->xid), je32_to_cpu(spx->version));
485 raw = jffs2_alloc_raw_node_ref();
486 if (!raw) {
487 JFFS2_NOTICE("allocation of node reference failed\n");
488 kfree(summary);
489 return -ENOMEM;
490 }
491 xd = jffs2_setup_xattr_datum(c, je32_to_cpu(spx->xid),
492 je32_to_cpu(spx->version));
493 if (IS_ERR(xd)) {
494 jffs2_free_raw_node_ref(raw);
495 if (PTR_ERR(xd) == -EEXIST) {
496 /* a newer version of xd exists */
497 DIRTY_SPACE(je32_to_cpu(spx->totlen));
498 sp += JFFS2_SUMMARY_XATTR_SIZE;
499 break;
500 }
501 JFFS2_NOTICE("allocation of xattr_datum failed\n");
502 kfree(summary);
503 return PTR_ERR(xd);
504 }
505 xd->node = raw;
506
507 raw->flash_offset = ofs | REF_UNCHECKED;
508 raw->next_in_ino = (void *)xd;
509
510 jffs2_link_node_ref(c, jeb, raw, PAD(je32_to_cpu(spx->totlen)));
511
512 *pseudo_random += je32_to_cpu(spx->xid);
513 sp += JFFS2_SUMMARY_XATTR_SIZE;
514
515 break;
516 }
517 case JFFS2_NODETYPE_XREF: {
518 struct jffs2_xattr_ref *ref;
519 struct jffs2_sum_xref_flash *spr;
520 uint32_t ofs;
521
522 spr = (struct jffs2_sum_xref_flash *)sp;
523 ofs = jeb->offset + je32_to_cpu(spr->offset);
524 dbg_summary("xref at %#08x (xid=%u, ino=%u)\n", ofs,
525 je32_to_cpu(spr->xid), je32_to_cpu(spr->ino));
526 raw = jffs2_alloc_raw_node_ref();
527 if (!raw) {
528 JFFS2_NOTICE("allocation of node reference failed\n");
529 kfree(summary);
530 return -ENOMEM;
531 }
532 ref = jffs2_alloc_xattr_ref();
533 if (!ref) {
534 JFFS2_NOTICE("allocation of xattr_datum failed\n");
535 jffs2_free_raw_node_ref(raw);
536 kfree(summary);
537 return -ENOMEM;
538 }
539 ref->ino = 0xfffffffe;
540 ref->xid = 0xfffffffd;
541 ref->node = raw;
542 ref->next = c->xref_temp;
543 c->xref_temp = ref;
544
545 raw->flash_offset = ofs | REF_UNCHECKED;
546 raw->next_in_ino = (void *)ref;
547
548 jffs2_link_node_ref(c, jeb, raw, PAD(sizeof(struct jffs2_raw_xref)));
549
550 *pseudo_random += ofs;
551 sp += JFFS2_SUMMARY_XREF_SIZE;
552
553 break;
554 }
555 #endif
556 default : {
557 printk("nodetype = %#04x\n",je16_to_cpu(((struct jffs2_sum_unknown_flash *)sp)->nodetype));
558 JFFS2_WARNING("Unsupported node type found in summary! Exiting...");
559 return -EIO;
560 }
561 }
562 }
563
564 return 0;
565 }
566
567 /* Process the summary node - called from jffs2_scan_eraseblock() */
568 int jffs2_sum_scan_sumnode(struct jffs2_sb_info *c, struct jffs2_eraseblock *jeb,
569 struct jffs2_raw_summary *summary, uint32_t sumsize,
570 uint32_t *pseudo_random)
571 {
572 struct jffs2_unknown_node crcnode;
573 struct jffs2_raw_node_ref *cache_ref;
574 int ret, ofs;
575 uint32_t crc;
576
577 ofs = jeb->offset + c->sector_size - sumsize;
578
579 dbg_summary("summary found for 0x%08x at 0x%08x (0x%x bytes)\n",
580 jeb->offset, ofs, sumsize);
581
582 /* OK, now check for node validity and CRC */
583 crcnode.magic = cpu_to_je16(JFFS2_MAGIC_BITMASK);
584 crcnode.nodetype = cpu_to_je16(JFFS2_NODETYPE_SUMMARY);
585 crcnode.totlen = summary->totlen;
586 crc = crc32(0, &crcnode, sizeof(crcnode)-4);
587
588 if (je32_to_cpu(summary->hdr_crc) != crc) {
589 dbg_summary("Summary node header is corrupt (bad CRC or "
590 "no summary at all)\n");
591 goto crc_err;
592 }
593
594 if (je32_to_cpu(summary->totlen) != sumsize) {
595 dbg_summary("Summary node is corrupt (wrong erasesize?)\n");
596 goto crc_err;
597 }
598
599 crc = crc32(0, summary, sizeof(struct jffs2_raw_summary)-8);
600
601 if (je32_to_cpu(summary->node_crc) != crc) {
602 dbg_summary("Summary node is corrupt (bad CRC)\n");
603 goto crc_err;
604 }
605
606 crc = crc32(0, summary->sum, sumsize - sizeof(struct jffs2_raw_summary));
607
608 if (je32_to_cpu(summary->sum_crc) != crc) {
609 dbg_summary("Summary node data is corrupt (bad CRC)\n");
610 goto crc_err;
611 }
612
613 if ( je32_to_cpu(summary->cln_mkr) ) {
614
615 dbg_summary("Summary : CLEANMARKER node \n");
616
617 if (je32_to_cpu(summary->cln_mkr) != c->cleanmarker_size) {
618 dbg_summary("CLEANMARKER node has totlen 0x%x != normal 0x%x\n",
619 je32_to_cpu(summary->cln_mkr), c->cleanmarker_size);
620 UNCHECKED_SPACE(PAD(je32_to_cpu(summary->cln_mkr)));
621 } else if (jeb->first_node) {
622 dbg_summary("CLEANMARKER node not first node in block "
623 "(0x%08x)\n", jeb->offset);
624 UNCHECKED_SPACE(PAD(je32_to_cpu(summary->cln_mkr)));
625 } else {
626 struct jffs2_raw_node_ref *marker_ref = jffs2_alloc_raw_node_ref();
627
628 if (!marker_ref) {
629 JFFS2_NOTICE("Failed to allocate node ref for clean marker\n");
630 return -ENOMEM;
631 }
632
633 marker_ref->flash_offset = jeb->offset | REF_NORMAL;
634 marker_ref->next_in_ino = NULL;
635
636 jffs2_link_node_ref(c, jeb, marker_ref, je32_to_cpu(summary->cln_mkr));
637 }
638 }
639
640 if (je32_to_cpu(summary->padded)) {
641 DIRTY_SPACE(je32_to_cpu(summary->padded));
642 }
643
644 ret = jffs2_sum_process_sum_data(c, jeb, summary, pseudo_random);
645 if (ret)
646 return ret;
647
648 /* for PARANOIA_CHECK */
649 cache_ref = jffs2_alloc_raw_node_ref();
650
651 if (!cache_ref) {
652 JFFS2_NOTICE("Failed to allocate node ref for cache\n");
653 return -ENOMEM;
654 }
655
656 cache_ref->next_in_ino = NULL;
657 cache_ref->next_phys = NULL;
658 cache_ref->flash_offset = ofs | REF_NORMAL;
659
660 jffs2_link_node_ref(c, jeb, cache_ref, sumsize);
661
662 jeb->wasted_size += jeb->free_size;
663 c->wasted_size += jeb->free_size;
664 c->free_size -= jeb->free_size;
665 jeb->free_size = 0;
666
667 return jffs2_scan_classify_jeb(c, jeb);
668
669 crc_err:
670 JFFS2_WARNING("Summary node crc error, skipping summary information.\n");
671
672 return 0;
673 }
674
675 /* Write summary data to flash - helper function for jffs2_sum_write_sumnode() */
676
677 static int jffs2_sum_write_data(struct jffs2_sb_info *c, struct jffs2_eraseblock *jeb,
678 uint32_t infosize, uint32_t datasize, int padsize)
679 {
680 struct jffs2_raw_summary isum;
681 union jffs2_sum_mem *temp;
682 struct jffs2_sum_marker *sm;
683 struct kvec vecs[2];
684 void *wpage;
685 int ret;
686 size_t retlen;
687
688 memset(c->summary->sum_buf, 0xff, datasize);
689 memset(&isum, 0, sizeof(isum));
690
691 isum.magic = cpu_to_je16(JFFS2_MAGIC_BITMASK);
692 isum.nodetype = cpu_to_je16(JFFS2_NODETYPE_SUMMARY);
693 isum.totlen = cpu_to_je32(infosize);
694 isum.hdr_crc = cpu_to_je32(crc32(0, &isum, sizeof(struct jffs2_unknown_node) - 4));
695 isum.padded = cpu_to_je32(c->summary->sum_padded);
696 isum.cln_mkr = cpu_to_je32(c->cleanmarker_size);
697 isum.sum_num = cpu_to_je32(c->summary->sum_num);
698 wpage = c->summary->sum_buf;
699
700 while (c->summary->sum_num) {
701 temp = c->summary->sum_list_head;
702
703 switch (je16_to_cpu(temp->u.nodetype)) {
704 case JFFS2_NODETYPE_INODE: {
705 struct jffs2_sum_inode_flash *sino_ptr = wpage;
706
707 sino_ptr->nodetype = temp->i.nodetype;
708 sino_ptr->inode = temp->i.inode;
709 sino_ptr->version = temp->i.version;
710 sino_ptr->offset = temp->i.offset;
711 sino_ptr->totlen = temp->i.totlen;
712
713 wpage += JFFS2_SUMMARY_INODE_SIZE;
714
715 break;
716 }
717
718 case JFFS2_NODETYPE_DIRENT: {
719 struct jffs2_sum_dirent_flash *sdrnt_ptr = wpage;
720
721 sdrnt_ptr->nodetype = temp->d.nodetype;
722 sdrnt_ptr->totlen = temp->d.totlen;
723 sdrnt_ptr->offset = temp->d.offset;
724 sdrnt_ptr->pino = temp->d.pino;
725 sdrnt_ptr->version = temp->d.version;
726 sdrnt_ptr->ino = temp->d.ino;
727 sdrnt_ptr->nsize = temp->d.nsize;
728 sdrnt_ptr->type = temp->d.type;
729
730 memcpy(sdrnt_ptr->name, temp->d.name,
731 temp->d.nsize);
732
733 wpage += JFFS2_SUMMARY_DIRENT_SIZE(temp->d.nsize);
734
735 break;
736 }
737 #ifdef CONFIG_JFFS2_FS_XATTR
738 case JFFS2_NODETYPE_XATTR: {
739 struct jffs2_sum_xattr_flash *sxattr_ptr = wpage;
740
741 temp = c->summary->sum_list_head;
742 sxattr_ptr->nodetype = temp->x.nodetype;
743 sxattr_ptr->xid = temp->x.xid;
744 sxattr_ptr->version = temp->x.version;
745 sxattr_ptr->offset = temp->x.offset;
746 sxattr_ptr->totlen = temp->x.totlen;
747
748 wpage += JFFS2_SUMMARY_XATTR_SIZE;
749 break;
750 }
751 case JFFS2_NODETYPE_XREF: {
752 struct jffs2_sum_xref_flash *sxref_ptr = wpage;
753
754 temp = c->summary->sum_list_head;
755 sxref_ptr->nodetype = temp->r.nodetype;
756 sxref_ptr->offset = temp->r.offset;
757
758 wpage += JFFS2_SUMMARY_XREF_SIZE;
759 break;
760 }
761 #endif
762 default : {
763 BUG(); /* unknown node in summary information */
764 }
765 }
766
767 c->summary->sum_list_head = temp->u.next;
768 kfree(temp);
769
770 c->summary->sum_num--;
771 }
772
773 jffs2_sum_reset_collected(c->summary);
774
775 wpage += padsize;
776
777 sm = wpage;
778 sm->offset = cpu_to_je32(c->sector_size - jeb->free_size);
779 sm->magic = cpu_to_je32(JFFS2_SUM_MAGIC);
780
781 isum.sum_crc = cpu_to_je32(crc32(0, c->summary->sum_buf, datasize));
782 isum.node_crc = cpu_to_je32(crc32(0, &isum, sizeof(isum) - 8));
783
784 vecs[0].iov_base = &isum;
785 vecs[0].iov_len = sizeof(isum);
786 vecs[1].iov_base = c->summary->sum_buf;
787 vecs[1].iov_len = datasize;
788
789 dbg_summary("JFFS2: writing out data to flash to pos : 0x%08x\n",
790 jeb->offset + c->sector_size - jeb->free_size);
791
792 spin_unlock(&c->erase_completion_lock);
793 ret = jffs2_flash_writev(c, vecs, 2, jeb->offset + c->sector_size -
794 jeb->free_size, &retlen, 0);
795 spin_lock(&c->erase_completion_lock);
796
797
798 if (ret || (retlen != infosize)) {
799 JFFS2_WARNING("Write of %u bytes at 0x%08x failed. returned %d, retlen %zd\n",
800 infosize, jeb->offset + c->sector_size - jeb->free_size, ret, retlen);
801
802 c->summary->sum_size = JFFS2_SUMMARY_NOSUM_SIZE;
803 WASTED_SPACE(infosize);
804
805 return 1;
806 }
807
808 return 0;
809 }
810
811 /* Write out summary information - called from jffs2_do_reserve_space */
812
813 int jffs2_sum_write_sumnode(struct jffs2_sb_info *c)
814 {
815 struct jffs2_raw_node_ref *summary_ref;
816 int datasize, infosize, padsize, ret;
817 struct jffs2_eraseblock *jeb;
818
819 dbg_summary("called\n");
820
821 jeb = c->nextblock;
822
823 if (!c->summary->sum_num || !c->summary->sum_list_head) {
824 JFFS2_WARNING("Empty summary info!!!\n");
825 BUG();
826 }
827
828 datasize = c->summary->sum_size + sizeof(struct jffs2_sum_marker);
829 infosize = sizeof(struct jffs2_raw_summary) + datasize;
830 padsize = jeb->free_size - infosize;
831 infosize += padsize;
832 datasize += padsize;
833
834 /* Is there enough space for summary? */
835 if (padsize < 0) {
836 /* don't try to write out summary for this jeb */
837 jffs2_sum_disable_collecting(c->summary);
838
839 JFFS2_WARNING("Not enough space for summary, padsize = %d\n", padsize);
840 return 0;
841 }
842
843 ret = jffs2_sum_write_data(c, jeb, infosize, datasize, padsize);
844 if (ret)
845 return 0; /* can't write out summary, block is marked as NOSUM_SIZE */
846
847 /* for ACCT_PARANOIA_CHECK */
848 spin_unlock(&c->erase_completion_lock);
849 summary_ref = jffs2_alloc_raw_node_ref();
850 spin_lock(&c->erase_completion_lock);
851
852 if (!summary_ref) {
853 JFFS2_NOTICE("Failed to allocate node ref for summary\n");
854 return -ENOMEM;
855 }
856
857 summary_ref->next_in_ino = NULL;
858 summary_ref->flash_offset = (jeb->offset + c->sector_size - jeb->free_size) | REF_NORMAL;
859
860 jffs2_link_node_ref(c, jeb, summary_ref, infosize);
861
862 return 0;
863 }
linux v2.6.22.y-op