56 struct block {  struct
87 	struct block *blocks;
94 	struct block *block = &part->blocks[block_no];  in build_block_map()  local
97 	block->offset = part->block_size * block_no;  in build_block_map()
100 		block->state = BLOCK_UNUSED;  in build_block_map()
104 	block->state = BLOCK_OK;  in build_block_map()
115 			block->free_sectors++;  in build_block_map()
138 		part->sector_map[entry] = block->offset +  in build_block_map()
141 		block->used_sectors++;  in build_block_map()
144 	if (block->free_sectors == part->data_sectors_per_block)  in build_block_map()
187 	part->blocks = kcalloc(part->total_blocks, sizeof(struct block),  in scan_header()
270 static int erase_block(struct partition *part, int block)  in erase_block()  argument
279 	erase->addr = part->blocks[block].offset;  in erase_block()
282 	part->blocks[block].state = BLOCK_ERASING;  in erase_block()
283 	part->blocks[block].free_sectors = 0;  in erase_block()
290 		part->blocks[block].state = BLOCK_FAILED;  in erase_block()
291 		part->blocks[block].free_sectors = 0;  in erase_block()
292 		part->blocks[block].used_sectors = 0;  in erase_block()
297 		part->blocks[block].state = BLOCK_ERASED;  in erase_block()
298 		part->blocks[block].free_sectors = part->data_sectors_per_block;  in erase_block()
299 		part->blocks[block].used_sectors = 0;  in erase_block()
300 		part->blocks[block].erases++;  in erase_block()
302 		rc = mtd_write(part->mbd.mtd, part->blocks[block].offset,  in erase_block()
309 			       part->mbd.mtd->name, part->blocks[block].offset);  in erase_block()
310 			part->blocks[block].state = BLOCK_FAILED;  in erase_block()
312 			part->blocks[block].state = BLOCK_OK;  in erase_block()
411 	int block, best_block, score, old_sector_block;  in reclaim_block()  local
424 	for (block=0; block<part->total_blocks; block++) {  in reclaim_block()
427 		if (block == part->reserved_block)  in reclaim_block()
435 		if (part->blocks[block].free_sectors)  in reclaim_block()
438 		this_score = part->blocks[block].used_sectors;  in reclaim_block()
440 		if (block == old_sector_block)  in reclaim_block()
444 			if (part->blocks[block].used_sectors ==  in reclaim_block()
449 		this_score += part->blocks[block].erases;  in reclaim_block()
452 			best_block = block;  in reclaim_block()
483 	int block, stop;  in find_free_block()  local
485 	block = part->current_block == -1 ?  in find_free_block()
487 	stop = block;  in find_free_block()
490 		if (part->blocks[block].free_sectors &&  in find_free_block()
491 				block != part->reserved_block)  in find_free_block()
492 			return block;  in find_free_block()
494 		if (part->blocks[block].state == BLOCK_UNUSED)  in find_free_block()
495 			erase_block(part, block);  in find_free_block()
497 		if (++block >= part->total_blocks)  in find_free_block()
498 			block = 0;  in find_free_block()
500 	} while (block != stop);  in find_free_block()
507 	int rc, block;  in find_writable_block()  local
510 	block = find_free_block(part);  in find_writable_block()
512 	if (block == -1) {  in find_writable_block()
518 			block = find_free_block(part);  in find_writable_block()
521 		if (block == -1) {  in find_writable_block()
527 	rc = mtd_read(part->mbd.mtd, part->blocks[block].offset,  in find_writable_block()
537 				part->blocks[block].offset);  in find_writable_block()
541 	part->current_block = block;  in find_writable_block()
549 	int block, offset, rc;  in mark_sector_deleted()  local
554 	block = old_addr / part->block_size;  in mark_sector_deleted()
558 	addr = part->blocks[block].offset +  in mark_sector_deleted()
571 	if (block == part->current_block)  in mark_sector_deleted()
574 	part->blocks[block].used_sectors--;  in mark_sector_deleted()
576 	if (!part->blocks[block].used_sectors &&  in mark_sector_deleted()
577 	    !part->blocks[block].free_sectors)  in mark_sector_deleted()
578 		rc = erase_block(part, block);  in mark_sector_deleted()
584 static int find_free_sector(const struct partition *part, const struct block *block)  in find_free_sector()  argument
588 	i = stop = part->data_sectors_per_block - block->free_sectors;  in find_free_sector()
606 	struct block *block;  in do_writesect()  local
621 	block = &part->blocks[part->current_block];  in do_writesect()
623 	i = find_free_sector(part, block);  in do_writesect()
631 		block->offset;  in do_writesect()
650 	addr = block->offset + (HEADER_MAP_OFFSET + i) * sizeof(u16);  in do_writesect()
662 	block->used_sectors++;  in do_writesect()
663 	block->free_sectors--;  in do_writesect()