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