Ejemplos de ext2_disk_node_root en C++ (Cpp)

Ejemplo n.º 1

Archivo: ext2_disk.c Proyecto: descent/osdev

void ext2_disk_mount() {
	DC = malloc(sizeof(ext2_disk_cache_entry_t) * CACHEENTRIES);
	SB = malloc(BLOCKSIZE);
	ext2_disk_read_block(1, (uint8_t *)SB);
	assert(SB->magic == EXT2_SUPER_MAGIC);
	if (SB->inode_size == 0) {
		SB->inode_size = 128;
	}
	BGDS = SB->blocks_count / SB->blocks_per_group;
	ext2_disk_inodes_per_group = SB->inodes_count / BGDS;

	// load the block group descriptors
	BGD = malloc(BLOCKSIZE);
	ext2_disk_read_block(2, (uint8_t *)BGD);

#if EXT2_DEBUG_BLOCK_DESCRIPTORS
	char bg_buffer[BLOCKSIZE];
	for (uint32_t i = 0; i < BGDS; ++i) {
		kprintf("Block Group Descriptor #%d @ %d\n", i, 2 + i * SB->blocks_per_group);
		kprintf("\tBlock Bitmap @ %d\n", BGD[i].block_bitmap); { 
			kprintf("\t\tExamining block bitmap at %d\n", BGD[i].block_bitmap);
			ext2_disk_read_block(BGD[i].block_bitmap, (uint8_t *)bg_buffer);
			uint32_t j = 0;
			while (BLOCKBIT(j)) {
				++j;
			}
			kprintf("\t\tFirst free block in group is %d\n", j + BGD[i].block_bitmap - 2);
		}
		kprintf("\tInode Bitmap @ %d\n", BGD[i].inode_bitmap); {
			kprintf("\t\tExamining inode bitmap at %d\n", BGD[i].inode_bitmap);
			ext2_disk_read_block(BGD[i].inode_bitmap, (uint8_t *)bg_buffer);
			uint32_t j = 0;
			while (BLOCKBIT(j)) {
				++j;
			}
			kprintf("\t\tFirst free inode in group is %d\n", j + ext2_disk_inodes_per_group * i + 1);
		}
		kprintf("\tInode Table  @ %d\n", BGD[i].inode_table);
		kprintf("\tFree Blocks =  %d\n", BGD[i].free_blocks_count);
		kprintf("\tFree Inodes =  %d\n", BGD[i].free_inodes_count);
	}
#endif
	ext2_inodetable_t *root_inode = ext2_disk_inode(2);

	RN = (fs_node_t *)malloc(sizeof(fs_node_t));
	assert(ext2_disk_node_root(root_inode, RN));
	fs_root = RN;
	LOG(INFO,"Mounted EXT2 disk, root VFS node is at 0x%x", RN);
}

Ejemplo n.º 2

Archivo: ext2_disk.c Proyecto: campaul/osdev

void ext2_disk_mount(uint32_t offset_sector, uint32_t max_sector) {
	debug_print(NOTICE, "Mounting EXT2 partition between sectors [%d:%d].", offset_sector, max_sector);

	ext2_offset = offset_sector;

	BLOCKSIZE = 1024;

	SB = malloc(BLOCKSIZE);
	ext2_disk_read_block(1, (uint8_t *)SB);
	assert(SB->magic == EXT2_SUPER_MAGIC);
	if (SB->inode_size == 0) {
		SB->inode_size = 128;
	}
	BLOCKSIZE = 1024 << SB->log_block_size;
	if (BLOCKSIZE > 2048) {
		CACHEENTRIES /= 4;
	}
	PTRS_PER_BLOCK = BLOCKSIZE / 4;
	debug_print(NOTICE, "Log block size = %d -> %d", SB->log_block_size, BLOCKSIZE);
	BGDS = SB->blocks_count / SB->blocks_per_group;
	if (SB->blocks_per_group * BGDS < SB->blocks_count) {
		BGDS += 1;
	}
	ext2_disk_inodes_per_group = SB->inodes_count / BGDS;

	debug_print(NOTICE, "Allocating cache...");
	DC = malloc(sizeof(ext2_disk_cache_entry_t) * CACHEENTRIES);
	for (uint32_t i = 0; i < CACHEENTRIES; ++i) {
		DC[i].block = malloc(BLOCKSIZE);
		if (i % 128 == 0) {
			debug_print(INFO, "Allocated cache block #%d", i+1);
		}
	}
	debug_print(NOTICE, "Allocated cache.");

	// load the block group descriptors
	int bgd_block_span = sizeof(ext2_bgdescriptor_t) * BGDS / BLOCKSIZE + 1;
	BGD = malloc(BLOCKSIZE * bgd_block_span);

	debug_print(INFO, "bgd_block_span = %d", bgd_block_span);

	int bgd_offset = 2;

	if (BLOCKSIZE > 1024) {
		bgd_offset = 1;
	}

	for (int i = 0; i < bgd_block_span; ++i) {
		ext2_disk_read_block(bgd_offset + i, (uint8_t *)((uint32_t)BGD + BLOCKSIZE * i));
	}

#if EXT2_DEBUG_BLOCK_DESCRIPTORS
	char * bg_buffer = malloc(BLOCKSIZE * sizeof(char));
	for (uint32_t i = 0; i < BGDS; ++i) {
		debug_print(INFO, "Block Group Descriptor #%d @ %d", i, bgd_offset + i * SB->blocks_per_group);
		debug_print(INFO, "\tBlock Bitmap @ %d", BGD[i].block_bitmap); { 
			debug_print(INFO, "\t\tExamining block bitmap at %d", BGD[i].block_bitmap);
			ext2_disk_read_block(BGD[i].block_bitmap, (uint8_t *)bg_buffer);
			uint32_t j = 0;
			while (BLOCKBIT(j)) {
				++j;
			}
			debug_print(INFO, "\t\tFirst free block in group is %d", j + BGD[i].block_bitmap - 2);
		}
		debug_print(INFO, "\tInode Bitmap @ %d", BGD[i].inode_bitmap); {
			debug_print(INFO, "\t\tExamining inode bitmap at %d", BGD[i].inode_bitmap);
			ext2_disk_read_block(BGD[i].inode_bitmap, (uint8_t *)bg_buffer);
			uint32_t j = 0;
			while (BLOCKBIT(j)) {
				++j;
			}
			debug_print(INFO, "\t\tFirst free inode in group is %d", j + ext2_disk_inodes_per_group * i + 1);
		}
		debug_print(INFO, "\tInode Table  @ %d", BGD[i].inode_table);
		debug_print(INFO, "\tFree Blocks =  %d", BGD[i].free_blocks_count);
		debug_print(INFO, "\tFree Inodes =  %d", BGD[i].free_inodes_count);
	}
	free(bg_buffer);
#endif

	ext2_inodetable_t *root_inode = ext2_disk_inode(2);
	RN = (fs_node_t *)malloc(sizeof(fs_node_t));
	if (!ext2_disk_node_root(root_inode, RN)) {
		debug_print(NOTICE, "Oh dear...");
	}
	debug_print(NOTICE, "Root file system is ready.");
	fs_root = RN;
	debug_print(NOTICE, "Mounted EXT2 disk, root VFS node is at 0x%x", RN);
}