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