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 * 9 * For licensing information, see the file 'LICENCE' in this directory. 10 * 11 * $Id: summary.c,v 1.3 2005/09/21 14:43:07 dedekind Exp $ 12 * 13 */ 14 15 #include <linux/kernel.h> 16 #include <linux/sched.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 = kmalloc(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 memset(c->summary, 0, sizeof(struct jffs2_summary)); 36 37 c->summary->sum_buf = vmalloc(c->sector_size); 38 39 if (!c->summary->sum_buf) { 40 JFFS2_WARNING("Can't allocate buffer for writing out summary information!\n"); 41 kfree(c->summary); 42 return -ENOMEM; 43 } 44 45 dbg_summary("returned succesfully\n"); 46 47 return 0; 48 } 49 50 void jffs2_sum_exit(struct jffs2_sb_info *c) 51 { 52 dbg_summary("called\n"); 53 54 jffs2_sum_disable_collecting(c->summary); 55 56 vfree(c->summary->sum_buf); 57 c->summary->sum_buf = NULL; 58 59 kfree(c->summary); 60 c->summary = NULL; 61 } 62 63 static int jffs2_sum_add_mem(struct jffs2_summary *s, union jffs2_sum_mem *item) 64 { 65 if (!s->sum_list_head) 66 s->sum_list_head = (union jffs2_sum_mem *) item; 67 if (s->sum_list_tail) 68 s->sum_list_tail->u.next = (union jffs2_sum_mem *) item; 69 s->sum_list_tail = (union jffs2_sum_mem *) item; 70 71 switch (je16_to_cpu(item->u.nodetype)) { 72 case JFFS2_NODETYPE_INODE: 73 s->sum_size += JFFS2_SUMMARY_INODE_SIZE; 74 s->sum_num++; 75 dbg_summary("inode (%u) added to summary\n", 76 je32_to_cpu(item->i.inode)); 77 break; 78 case JFFS2_NODETYPE_DIRENT: 79 s->sum_size += JFFS2_SUMMARY_DIRENT_SIZE(item->d.nsize); 80 s->sum_num++; 81 dbg_summary("dirent (%u) added to summary\n", 82 je32_to_cpu(item->d.ino)); 83 break; 84 default: 85 JFFS2_WARNING("UNKNOWN node type %u\n", 86 je16_to_cpu(item->u.nodetype)); 87 return 1; 88 } 89 return 0; 90 } 91 92 93 /* The following 3 functions are called from scan.c to collect summary info for not closed jeb */ 94 95 int jffs2_sum_add_padding_mem(struct jffs2_summary *s, uint32_t size) 96 { 97 dbg_summary("called with %u\n", size); 98 s->sum_padded += size; 99 return 0; 100 } 101 102 int jffs2_sum_add_inode_mem(struct jffs2_summary *s, struct jffs2_raw_inode *ri, 103 uint32_t ofs) 104 { 105 struct jffs2_sum_inode_mem *temp = kmalloc(sizeof(struct jffs2_sum_inode_mem), GFP_KERNEL); 106 107 if (!temp) 108 return -ENOMEM; 109 110 temp->nodetype = ri->nodetype; 111 temp->inode = ri->ino; 112 temp->version = ri->version; 113 temp->offset = cpu_to_je32(ofs); /* relative offset from the begining of the jeb */ 114 temp->totlen = ri->totlen; 115 temp->next = NULL; 116 117 return jffs2_sum_add_mem(s, (union jffs2_sum_mem *)temp); 118 } 119 120 int jffs2_sum_add_dirent_mem(struct jffs2_summary *s, struct jffs2_raw_dirent *rd, 121 uint32_t ofs) 122 { 123 struct jffs2_sum_dirent_mem *temp = 124 kmalloc(sizeof(struct jffs2_sum_dirent_mem) + rd->nsize, GFP_KERNEL); 125 126 if (!temp) 127 return -ENOMEM; 128 129 temp->nodetype = rd->nodetype; 130 temp->totlen = rd->totlen; 131 temp->offset = cpu_to_je32(ofs); /* relative from the begining of the jeb */ 132 temp->pino = rd->pino; 133 temp->version = rd->version; 134 temp->ino = rd->ino; 135 temp->nsize = rd->nsize; 136 temp->type = rd->type; 137 temp->next = NULL; 138 139 memcpy(temp->name, rd->name, rd->nsize); 140 141 return jffs2_sum_add_mem(s, (union jffs2_sum_mem *)temp); 142 } 143 144 /* Cleanup every collected summary information */ 145 146 static void jffs2_sum_clean_collected(struct jffs2_summary *s) 147 { 148 union jffs2_sum_mem *temp; 149 150 if (!s->sum_list_head) { 151 dbg_summary("already empty\n"); 152 } 153 while (s->sum_list_head) { 154 temp = s->sum_list_head; 155 s->sum_list_head = s->sum_list_head->u.next; 156 kfree(temp); 157 } 158 s->sum_list_tail = NULL; 159 s->sum_padded = 0; 160 s->sum_num = 0; 161 } 162 163 void jffs2_sum_reset_collected(struct jffs2_summary *s) 164 { 165 dbg_summary("called\n"); 166 jffs2_sum_clean_collected(s); 167 s->sum_size = 0; 168 } 169 170 void jffs2_sum_disable_collecting(struct jffs2_summary *s) 171 { 172 dbg_summary("called\n"); 173 jffs2_sum_clean_collected(s); 174 s->sum_size = JFFS2_SUMMARY_NOSUM_SIZE; 175 } 176 177 int jffs2_sum_is_disabled(struct jffs2_summary *s) 178 { 179 return (s->sum_size == JFFS2_SUMMARY_NOSUM_SIZE); 180 } 181 182 /* Move the collected summary information into sb (called from scan.c) */ 183 184 void jffs2_sum_move_collected(struct jffs2_sb_info *c, struct jffs2_summary *s) 185 { 186 dbg_summary("oldsize=0x%x oldnum=%u => newsize=0x%x newnum=%u\n", 187 c->summary->sum_size, c->summary->sum_num, 188 s->sum_size, s->sum_num); 189 190 c->summary->sum_size = s->sum_size; 191 c->summary->sum_num = s->sum_num; 192 c->summary->sum_padded = s->sum_padded; 193 c->summary->sum_list_head = s->sum_list_head; 194 c->summary->sum_list_tail = s->sum_list_tail; 195 196 s->sum_list_head = s->sum_list_tail = NULL; 197 } 198 199 /* Called from wbuf.c to collect writed node info */ 200 201 int jffs2_sum_add_kvec(struct jffs2_sb_info *c, const struct kvec *invecs, 202 unsigned long count, uint32_t ofs) 203 { 204 union jffs2_node_union *node; 205 struct jffs2_eraseblock *jeb; 206 207 node = invecs[0].iov_base; 208 jeb = &c->blocks[ofs / c->sector_size]; 209 ofs -= jeb->offset; 210 211 switch (je16_to_cpu(node->u.nodetype)) { 212 case JFFS2_NODETYPE_INODE: { 213 struct jffs2_sum_inode_mem *temp = 214 kmalloc(sizeof(struct jffs2_sum_inode_mem), GFP_KERNEL); 215 216 if (!temp) 217 goto no_mem; 218 219 temp->nodetype = node->i.nodetype; 220 temp->inode = node->i.ino; 221 temp->version = node->i.version; 222 temp->offset = cpu_to_je32(ofs); 223 temp->totlen = node->i.totlen; 224 temp->next = NULL; 225 226 return jffs2_sum_add_mem(c->summary, (union jffs2_sum_mem *)temp); 227 } 228 229 case JFFS2_NODETYPE_DIRENT: { 230 struct jffs2_sum_dirent_mem *temp = 231 kmalloc(sizeof(struct jffs2_sum_dirent_mem) + node->d.nsize, GFP_KERNEL); 232 233 if (!temp) 234 goto no_mem; 235 236 temp->nodetype = node->d.nodetype; 237 temp->totlen = node->d.totlen; 238 temp->offset = cpu_to_je32(ofs); 239 temp->pino = node->d.pino; 240 temp->version = node->d.version; 241 temp->ino = node->d.ino; 242 temp->nsize = node->d.nsize; 243 temp->type = node->d.type; 244 temp->next = NULL; 245 246 switch (count) { 247 case 1: 248 memcpy(temp->name,node->d.name,node->d.nsize); 249 break; 250 251 case 2: 252 memcpy(temp->name,invecs[1].iov_base,node->d.nsize); 253 break; 254 255 default: 256 BUG(); /* impossible count value */ 257 break; 258 } 259 260 return jffs2_sum_add_mem(c->summary, (union jffs2_sum_mem *)temp); 261 } 262 263 case JFFS2_NODETYPE_PADDING: 264 dbg_summary("node PADDING\n"); 265 c->summary->sum_padded += je32_to_cpu(node->u.totlen); 266 break; 267 268 case JFFS2_NODETYPE_CLEANMARKER: 269 dbg_summary("node CLEANMARKER\n"); 270 break; 271 272 case JFFS2_NODETYPE_SUMMARY: 273 dbg_summary("node SUMMARY\n"); 274 break; 275 276 default: 277 /* If you implement a new node type you should also implement 278 summary support for it or disable summary. 279 */ 280 BUG(); 281 break; 282 } 283 284 return 0; 285 286 no_mem: 287 JFFS2_WARNING("MEMORY ALLOCATION ERROR!"); 288 return -ENOMEM; 289 } 290 291 292 /* Process the stored summary information - helper function for jffs2_sum_scan_sumnode() */ 293 294 static int jffs2_sum_process_sum_data(struct jffs2_sb_info *c, struct jffs2_eraseblock *jeb, 295 struct jffs2_summary_node *summary, uint32_t *pseudo_random) 296 { 297 struct jffs2_raw_node_ref *raw; 298 struct jffs2_inode_cache *ic; 299 struct jffs2_full_dirent *fd; 300 void *sp; 301 int i, ino; 302 303 sp = summary->sum; 304 305 for (i=0; i<je32_to_cpu(summary->sum_num); i++) { 306 dbg_summary("processing summary index %d\n", i); 307 308 switch (je16_to_cpu(((struct jffs2_sum_unknown_flash *)sp)->nodetype)) { 309 case JFFS2_NODETYPE_INODE: { 310 struct jffs2_sum_inode_flash *spi; 311 spi = sp; 312 313 ino = je32_to_cpu(spi->inode); 314 315 dbg_summary("Inode at 0x%08x\n", 316 jeb->offset + je32_to_cpu(spi->offset)); 317 318 raw = jffs2_alloc_raw_node_ref(); 319 if (!raw) { 320 JFFS2_NOTICE("allocation of node reference failed\n"); 321 kfree(summary); 322 return -ENOMEM; 323 } 324 325 ic = jffs2_scan_make_ino_cache(c, ino); 326 if (!ic) { 327 JFFS2_NOTICE("scan_make_ino_cache failed\n"); 328 jffs2_free_raw_node_ref(raw); 329 kfree(summary); 330 return -ENOMEM; 331 } 332 333 raw->flash_offset = (jeb->offset + je32_to_cpu(spi->offset)) | REF_UNCHECKED; 334 raw->__totlen = PAD(je32_to_cpu(spi->totlen)); 335 raw->next_phys = NULL; 336 raw->next_in_ino = ic->nodes; 337 338 ic->nodes = raw; 339 if (!jeb->first_node) 340 jeb->first_node = raw; 341 if (jeb->last_node) 342 jeb->last_node->next_phys = raw; 343 jeb->last_node = raw; 344 *pseudo_random += je32_to_cpu(spi->version); 345 346 UNCHECKED_SPACE(PAD(je32_to_cpu(spi->totlen))); 347 348 sp += JFFS2_SUMMARY_INODE_SIZE; 349 350 break; 351 } 352 353 case JFFS2_NODETYPE_DIRENT: { 354 struct jffs2_sum_dirent_flash *spd; 355 spd = sp; 356 357 dbg_summary("Dirent at 0x%08x\n", 358 jeb->offset + je32_to_cpu(spd->offset)); 359 360 fd = jffs2_alloc_full_dirent(spd->nsize+1); 361 if (!fd) { 362 kfree(summary); 363 return -ENOMEM; 364 } 365 366 memcpy(&fd->name, spd->name, spd->nsize); 367 fd->name[spd->nsize] = 0; 368 369 raw = jffs2_alloc_raw_node_ref(); 370 if (!raw) { 371 jffs2_free_full_dirent(fd); 372 JFFS2_NOTICE("allocation of node reference failed\n"); 373 kfree(summary); 374 return -ENOMEM; 375 } 376 377 ic = jffs2_scan_make_ino_cache(c, je32_to_cpu(spd->pino)); 378 if (!ic) { 379 jffs2_free_full_dirent(fd); 380 jffs2_free_raw_node_ref(raw); 381 kfree(summary); 382 return -ENOMEM; 383 } 384 385 raw->__totlen = PAD(je32_to_cpu(spd->totlen)); 386 raw->flash_offset = (jeb->offset + je32_to_cpu(spd->offset)) | REF_PRISTINE; 387 raw->next_phys = NULL; 388 raw->next_in_ino = ic->nodes; 389 ic->nodes = raw; 390 if (!jeb->first_node) 391 jeb->first_node = raw; 392 if (jeb->last_node) 393 jeb->last_node->next_phys = raw; 394 jeb->last_node = raw; 395 396 fd->raw = raw; 397 fd->next = NULL; 398 fd->version = je32_to_cpu(spd->version); 399 fd->ino = je32_to_cpu(spd->ino); 400 fd->nhash = full_name_hash(fd->name, spd->nsize); 401 fd->type = spd->type; 402 USED_SPACE(PAD(je32_to_cpu(spd->totlen))); 403 jffs2_add_fd_to_list(c, fd, &ic->scan_dents); 404 405 *pseudo_random += je32_to_cpu(spd->version); 406 407 sp += JFFS2_SUMMARY_DIRENT_SIZE(spd->nsize); 408 409 break; 410 } 411 412 default : { 413 JFFS2_WARNING("Unsupported node type found in summary! Exiting..."); 414 kfree(summary); 415 return -EIO; 416 } 417 } 418 } 419 420 kfree(summary); 421 return 0; 422 } 423 424 /* Process the summary node - called from jffs2_scan_eraseblock() */ 425 426 int jffs2_sum_scan_sumnode(struct jffs2_sb_info *c, struct jffs2_eraseblock *jeb, 427 uint32_t ofs, uint32_t *pseudo_random) 428 { 429 struct jffs2_unknown_node crcnode; 430 struct jffs2_raw_node_ref *cache_ref; 431 struct jffs2_summary_node *summary; 432 int ret, sumsize; 433 uint32_t crc; 434 435 sumsize = c->sector_size - ofs; 436 ofs += jeb->offset; 437 438 dbg_summary("summary found for 0x%08x at 0x%08x (0x%x bytes)\n", 439 jeb->offset, ofs, sumsize); 440 441 summary = kmalloc(sumsize, GFP_KERNEL); 442 443 if (!summary) { 444 return -ENOMEM; 445 } 446 447 ret = jffs2_fill_scan_buf(c, (unsigned char *)summary, ofs, sumsize); 448 449 if (ret) { 450 kfree(summary); 451 return ret; 452 } 453 454 /* OK, now check for node validity and CRC */ 455 crcnode.magic = cpu_to_je16(JFFS2_MAGIC_BITMASK); 456 crcnode.nodetype = cpu_to_je16(JFFS2_NODETYPE_SUMMARY); 457 crcnode.totlen = summary->totlen; 458 crc = crc32(0, &crcnode, sizeof(crcnode)-4); 459 460 if (je32_to_cpu(summary->hdr_crc) != crc) { 461 dbg_summary("Summary node header is corrupt (bad CRC or " 462 "no summary at all)\n"); 463 goto crc_err; 464 } 465 466 if (je32_to_cpu(summary->totlen) != sumsize) { 467 dbg_summary("Summary node is corrupt (wrong erasesize?)\n"); 468 goto crc_err; 469 } 470 471 crc = crc32(0, summary, sizeof(struct jffs2_summary_node)-8); 472 473 if (je32_to_cpu(summary->node_crc) != crc) { 474 dbg_summary("Summary node is corrupt (bad CRC)\n"); 475 goto crc_err; 476 } 477 478 crc = crc32(0, summary->sum, sumsize - sizeof(struct jffs2_summary_node)); 479 480 if (je32_to_cpu(summary->sum_crc) != crc) { 481 dbg_summary("Summary node data is corrupt (bad CRC)\n"); 482 goto crc_err; 483 } 484 485 if ( je32_to_cpu(summary->cln_mkr) ) { 486 487 dbg_summary("Summary : CLEANMARKER node \n"); 488 489 if (je32_to_cpu(summary->cln_mkr) != c->cleanmarker_size) { 490 dbg_summary("CLEANMARKER node has totlen 0x%x != normal 0x%x\n", 491 je32_to_cpu(summary->cln_mkr), c->cleanmarker_size); 492 UNCHECKED_SPACE(PAD(je32_to_cpu(summary->cln_mkr))); 493 } else if (jeb->first_node) { 494 dbg_summary("CLEANMARKER node not first node in block " 495 "(0x%08x)\n", jeb->offset); 496 UNCHECKED_SPACE(PAD(je32_to_cpu(summary->cln_mkr))); 497 } else { 498 struct jffs2_raw_node_ref *marker_ref = jffs2_alloc_raw_node_ref(); 499 500 if (!marker_ref) { 501 JFFS2_NOTICE("Failed to allocate node ref for clean marker\n"); 502 kfree(summary); 503 return -ENOMEM; 504 } 505 506 marker_ref->next_in_ino = NULL; 507 marker_ref->next_phys = NULL; 508 marker_ref->flash_offset = jeb->offset | REF_NORMAL; 509 marker_ref->__totlen = je32_to_cpu(summary->cln_mkr); 510 jeb->first_node = jeb->last_node = marker_ref; 511 512 USED_SPACE( PAD(je32_to_cpu(summary->cln_mkr)) ); 513 } 514 } 515 516 if (je32_to_cpu(summary->padded)) { 517 DIRTY_SPACE(je32_to_cpu(summary->padded)); 518 } 519 520 ret = jffs2_sum_process_sum_data(c, jeb, summary, pseudo_random); 521 if (ret) 522 return ret; 523 524 /* for PARANOIA_CHECK */ 525 cache_ref = jffs2_alloc_raw_node_ref(); 526 527 if (!cache_ref) { 528 JFFS2_NOTICE("Failed to allocate node ref for cache\n"); 529 return -ENOMEM; 530 } 531 532 cache_ref->next_in_ino = NULL; 533 cache_ref->next_phys = NULL; 534 cache_ref->flash_offset = ofs | REF_NORMAL; 535 cache_ref->__totlen = sumsize; 536 537 if (!jeb->first_node) 538 jeb->first_node = cache_ref; 539 if (jeb->last_node) 540 jeb->last_node->next_phys = cache_ref; 541 jeb->last_node = cache_ref; 542 543 USED_SPACE(sumsize); 544 545 jeb->wasted_size += jeb->free_size; 546 c->wasted_size += jeb->free_size; 547 c->free_size -= jeb->free_size; 548 jeb->free_size = 0; 549 550 return jffs2_scan_classify_jeb(c, jeb); 551 552 crc_err: 553 JFFS2_WARNING("Summary node crc error, skipping summary information.\n"); 554 555 return 0; 556 } 557 558 /* Write summary data to flash - helper function for jffs2_sum_write_sumnode() */ 559 560 static int jffs2_sum_write_data(struct jffs2_sb_info *c, struct jffs2_eraseblock *jeb, 561 uint32_t infosize, uint32_t datasize, int padsize) 562 { 563 struct jffs2_summary_node isum; 564 union jffs2_sum_mem *temp; 565 struct jffs2_sum_marker *sm; 566 struct kvec vecs[2]; 567 void *wpage; 568 int ret; 569 size_t retlen; 570 571 memset(c->summary->sum_buf, 0xff, datasize); 572 memset(&isum, 0, sizeof(isum)); 573 574 isum.magic = cpu_to_je16(JFFS2_MAGIC_BITMASK); 575 isum.nodetype = cpu_to_je16(JFFS2_NODETYPE_SUMMARY); 576 isum.totlen = cpu_to_je32(infosize); 577 isum.hdr_crc = cpu_to_je32(crc32(0, &isum, sizeof(struct jffs2_unknown_node) - 4)); 578 isum.padded = cpu_to_je32(c->summary->sum_padded); 579 isum.cln_mkr = cpu_to_je32(c->cleanmarker_size); 580 isum.sum_num = cpu_to_je32(c->summary->sum_num); 581 wpage = c->summary->sum_buf; 582 583 while (c->summary->sum_num) { 584 585 switch (je16_to_cpu(c->summary->sum_list_head->u.nodetype)) { 586 case JFFS2_NODETYPE_INODE: { 587 struct jffs2_sum_inode_flash *sino_ptr = wpage; 588 589 sino_ptr->nodetype = c->summary->sum_list_head->i.nodetype; 590 sino_ptr->inode = c->summary->sum_list_head->i.inode; 591 sino_ptr->version = c->summary->sum_list_head->i.version; 592 sino_ptr->offset = c->summary->sum_list_head->i.offset; 593 sino_ptr->totlen = c->summary->sum_list_head->i.totlen; 594 595 wpage += JFFS2_SUMMARY_INODE_SIZE; 596 597 break; 598 } 599 600 case JFFS2_NODETYPE_DIRENT: { 601 struct jffs2_sum_dirent_flash *sdrnt_ptr = wpage; 602 603 sdrnt_ptr->nodetype = c->summary->sum_list_head->d.nodetype; 604 sdrnt_ptr->totlen = c->summary->sum_list_head->d.totlen; 605 sdrnt_ptr->offset = c->summary->sum_list_head->d.offset; 606 sdrnt_ptr->pino = c->summary->sum_list_head->d.pino; 607 sdrnt_ptr->version = c->summary->sum_list_head->d.version; 608 sdrnt_ptr->ino = c->summary->sum_list_head->d.ino; 609 sdrnt_ptr->nsize = c->summary->sum_list_head->d.nsize; 610 sdrnt_ptr->type = c->summary->sum_list_head->d.type; 611 612 memcpy(sdrnt_ptr->name, c->summary->sum_list_head->d.name, 613 c->summary->sum_list_head->d.nsize); 614 615 wpage += JFFS2_SUMMARY_DIRENT_SIZE(c->summary->sum_list_head->d.nsize); 616 617 break; 618 } 619 620 default : { 621 BUG(); /* unknown node in summary information */ 622 } 623 } 624 625 temp = c->summary->sum_list_head; 626 c->summary->sum_list_head = c->summary->sum_list_head->u.next; 627 kfree(temp); 628 629 c->summary->sum_num--; 630 } 631 632 jffs2_sum_reset_collected(c->summary); 633 634 wpage += padsize; 635 636 sm = wpage; 637 sm->offset = cpu_to_je32(c->sector_size - jeb->free_size); 638 sm->magic = cpu_to_je32(JFFS2_SUM_MAGIC); 639 640 isum.sum_crc = cpu_to_je32(crc32(0, c->summary->sum_buf, datasize)); 641 isum.node_crc = cpu_to_je32(crc32(0, &isum, sizeof(isum) - 8)); 642 643 vecs[0].iov_base = &isum; 644 vecs[0].iov_len = sizeof(isum); 645 vecs[1].iov_base = c->summary->sum_buf; 646 vecs[1].iov_len = datasize; 647 648 dbg_summary("JFFS2: writing out data to flash to pos : 0x%08x\n", 649 jeb->offset + c->sector_size - jeb->free_size); 650 651 spin_unlock(&c->erase_completion_lock); 652 ret = jffs2_flash_writev(c, vecs, 2, jeb->offset + c->sector_size - 653 jeb->free_size, &retlen, 0); 654 spin_lock(&c->erase_completion_lock); 655 656 657 if (ret || (retlen != infosize)) { 658 JFFS2_WARNING("Write of %zd bytes at 0x%08x failed. returned %d, retlen %zd\n", 659 infosize, jeb->offset + c->sector_size - jeb->free_size, ret, retlen); 660 661 c->summary->sum_size = JFFS2_SUMMARY_NOSUM_SIZE; 662 WASTED_SPACE(infosize); 663 664 return 1; 665 } 666 667 return 0; 668 } 669 670 /* Write out summary information - called from jffs2_do_reserve_space */ 671 672 int jffs2_sum_write_sumnode(struct jffs2_sb_info *c) 673 { 674 struct jffs2_raw_node_ref *summary_ref; 675 int datasize, infosize, padsize, ret; 676 struct jffs2_eraseblock *jeb; 677 678 dbg_summary("called\n"); 679 680 jeb = c->nextblock; 681 682 if (!c->summary->sum_num || !c->summary->sum_list_head) { 683 JFFS2_WARNING("Empty summary info!!!\n"); 684 BUG(); 685 } 686 687 datasize = c->summary->sum_size + sizeof(struct jffs2_sum_marker); 688 infosize = sizeof(struct jffs2_summary_node) + datasize; 689 padsize = jeb->free_size - infosize; 690 infosize += padsize; 691 datasize += padsize; 692 693 /* Is there enough space for summary? */ 694 if (padsize < 0) { 695 /* don't try to write out summary for this jeb */ 696 jffs2_sum_disable_collecting(c->summary); 697 698 JFFS2_WARNING("Not enough space for summary, padsize = %d\n", padsize); 699 return 0; 700 } 701 702 ret = jffs2_sum_write_data(c, jeb, infosize, datasize, padsize); 703 if (ret) 704 return 0; /* can't write out summary, block is marked as NOSUM_SIZE */ 705 706 /* for ACCT_PARANOIA_CHECK */ 707 spin_unlock(&c->erase_completion_lock); 708 summary_ref = jffs2_alloc_raw_node_ref(); 709 spin_lock(&c->erase_completion_lock); 710 711 if (!summary_ref) { 712 JFFS2_NOTICE("Failed to allocate node ref for summary\n"); 713 return -ENOMEM; 714 } 715 716 summary_ref->next_in_ino = NULL; 717 summary_ref->next_phys = NULL; 718 summary_ref->flash_offset = (jeb->offset + c->sector_size - jeb->free_size) | REF_NORMAL; 719 summary_ref->__totlen = infosize; 720 721 if (!jeb->first_node) 722 jeb->first_node = summary_ref; 723 if (jeb->last_node) 724 jeb->last_node->next_phys = summary_ref; 725 jeb->last_node = summary_ref; 726 727 USED_SPACE(infosize); 728 729 return 0; 730 } 731