C++ io_manager类代码示例

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本文整理汇总了C++中io_manager类的典型用法代码示例。如果您正苦于以下问题：C++ io_manager类的具体用法？C++ io_manager怎么用？C++ io_manager使用的例子？那么恭喜您, 这里精选的类代码示例或许可以为您提供帮助。

在下文中一共展示了io_manager类的7个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于我们的系统推荐出更棒的C++代码示例。

示例1: test_open

static errcode_t test_open(const char *name, int flags, io_channel *channel)
{
	io_channel	io = NULL;
	struct test_private_data *data = NULL;
	errcode_t	retval;

	if (name == 0)
		return EXT2_ET_BAD_DEVICE_NAME;
	retval = ext2fs_get_mem(sizeof(struct struct_io_channel),
				(void **) &io);
	if (retval)
		return retval;
	memset(io, 0, sizeof(struct struct_io_channel));
	io->magic = EXT2_ET_MAGIC_IO_CHANNEL;
	retval = ext2fs_get_mem(sizeof(struct test_private_data),
				(void **) &data);
	if (retval) {
		retval = EXT2_ET_NO_MEMORY;
		goto cleanup;
	}
	io->manager = test_io_manager;
	retval = ext2fs_get_mem(strlen(name)+1, (void **) &io->name);
	if (retval)
		goto cleanup;

	strcpy(io->name, name);
	io->private_data = data;
	io->block_size = 1024;
	io->read_error = 0;
	io->write_error = 0;
	io->refcount = 1;

	memset(data, 0, sizeof(struct test_private_data));
	data->magic = EXT2_ET_MAGIC_TEST_IO_CHANNEL;
	if (test_io_backing_manager) {
		retval = test_io_backing_manager->open(name, flags,
						       &data->real);
		if (retval)
			goto cleanup;
	} else
		data->real = 0;
	data->read_blk = 	test_io_cb_read_blk;
	data->write_blk = 	test_io_cb_write_blk;
	data->set_blksize = 	test_io_cb_set_blksize;
	data->write_byte = 	test_io_cb_write_byte;
	
	*channel = io;
	return 0;

cleanup:
	if (io)
		ext2fs_free_mem((void **) &io);
	if (data)
		ext2fs_free_mem((void **) &data);
	return retval;
}

开发者ID:DentonGentry，项目名称:gfiber-gfrg100，代码行数:56，代码来源:test_io.c

示例2: test_open

static errcode_t test_open(const char *name, int flags, io_channel *channel)
{
	io_channel	io = NULL;
	struct test_private_data *data = NULL;
	errcode_t	retval;
	char		*value;

	if (name == 0)
		return EXT2_ET_BAD_DEVICE_NAME;
	retval = ext2fs_get_mem(sizeof(struct struct_io_channel), &io);
	if (retval)
		return retval;
	memset(io, 0, sizeof(struct struct_io_channel));
	io->magic = EXT2_ET_MAGIC_IO_CHANNEL;
	retval = ext2fs_get_mem(sizeof(struct test_private_data), &data);
	if (retval) {
		retval = EXT2_ET_NO_MEMORY;
		goto cleanup;
	}
	io->manager = test_io_manager;
	retval = ext2fs_get_mem(strlen(name)+1, &io->name);
	if (retval)
		goto cleanup;

	strcpy(io->name, name);
	io->private_data = data;
	io->block_size = 1024;
	io->read_error = 0;
	io->write_error = 0;
	io->refcount = 1;

	memset(data, 0, sizeof(struct test_private_data));
	data->magic = EXT2_ET_MAGIC_TEST_IO_CHANNEL;
	if (test_io_backing_manager) {
		retval = test_io_backing_manager->open(name, flags,
						       &data->real);
		if (retval)
			goto cleanup;
	} else
		data->real = 0;
	data->read_blk = 	test_io_cb_read_blk;
	data->write_blk = 	test_io_cb_write_blk;
	data->set_blksize = 	test_io_cb_set_blksize;
	data->write_byte = 	test_io_cb_write_byte;
	data->read_blk64 = 	test_io_cb_read_blk64;
	data->write_blk64 = 	test_io_cb_write_blk64;

	data->outfile = NULL;
	if ((value = safe_getenv("TEST_IO_LOGFILE")) != NULL)
		data->outfile = fopen(value, "w");
	if (!data->outfile)
		data->outfile = stderr;

	data->flags = 0;
	if ((value = safe_getenv("TEST_IO_FLAGS")) != NULL)
		data->flags = strtoul(value, NULL, 0);

	data->block = 0;
	if ((value = safe_getenv("TEST_IO_BLOCK")) != NULL)
		data->block = strtoul(value, NULL, 0);

	data->read_abort_count = 0;
	if ((value = safe_getenv("TEST_IO_READ_ABORT")) != NULL)
		data->read_abort_count = strtoul(value, NULL, 0);

	data->write_abort_count = 0;
	if ((value = safe_getenv("TEST_IO_WRITE_ABORT")) != NULL)
		data->write_abort_count = strtoul(value, NULL, 0);

	*channel = io;
	return 0;

cleanup:
	if (io)
		ext2fs_free_mem(&io);
	if (data)
		ext2fs_free_mem(&data);
	return retval;
}

开发者ID:119，项目名称:aircam-openwrt，代码行数:79，代码来源:test_io.c

示例3: get_backup_sb

blk64_t get_backup_sb(e2fsck_t ctx, ext2_filsys fs, const char *name,
		      io_manager manager)
{
	struct ext2_super_block *sb;
	io_channel		io = NULL;
	void			*buf = NULL;
	int			blocksize;
	blk64_t			superblock, ret_sb = 8193;

	if (fs && fs->super) {
		ret_sb = (fs->super->s_blocks_per_group +
			  fs->super->s_first_data_block);
		if (ctx) {
			ctx->superblock = ret_sb;
			ctx->blocksize = fs->blocksize;
		}
		return ret_sb;
	}

	if (ctx) {
		if (ctx->blocksize) {
			ret_sb = ctx->blocksize * 8;
			if (ctx->blocksize == 1024)
				ret_sb++;
			ctx->superblock = ret_sb;
			return ret_sb;
		}
		ctx->superblock = ret_sb;
		ctx->blocksize = 1024;
	}

	if (!name || !manager)
		goto cleanup;

	if (manager->open(name, 0, &io) != 0)
		goto cleanup;

	if (ext2fs_get_mem(SUPERBLOCK_SIZE, &buf))
		goto cleanup;
	sb = (struct ext2_super_block *) buf;

	for (blocksize = EXT2_MIN_BLOCK_SIZE;
	     blocksize <= EXT2_MAX_BLOCK_SIZE ; blocksize *= 2) {
		superblock = blocksize*8;
		if (blocksize == 1024)
			superblock++;
		io_channel_set_blksize(io, blocksize);
		if (io_channel_read_blk64(io, superblock,
					-SUPERBLOCK_SIZE, buf))
			continue;
#ifdef WORDS_BIGENDIAN
		if (sb->s_magic == ext2fs_swab16(EXT2_SUPER_MAGIC))
			ext2fs_swap_super(sb);
#endif
		if ((sb->s_magic == EXT2_SUPER_MAGIC) &&
		    (EXT2_BLOCK_SIZE(sb) == blocksize)) {
			ret_sb = superblock;
			if (ctx) {
				ctx->superblock = superblock;
				ctx->blocksize = blocksize;
			}
			break;
		}
	}

cleanup:
	if (io)
		io_channel_close(io);
	if (buf)
		ext2fs_free_mem(&buf);
	return (ret_sb);
}

开发者ID:guaneryu，项目名称:e2fsprogs，代码行数:72，代码来源:util.c

示例4: ext2fs_open2

/*
 *  Note: if superblock is non-zero, block-size must also be non-zero.
 * 	Superblock and block_size can be zero to use the default size.
 *
 * Valid flags for ext2fs_open()
 *
 * 	EXT2_FLAG_RW	- Open the filesystem for read/write.
 * 	EXT2_FLAG_FORCE - Open the filesystem even if some of the
 *				features aren't supported.
 *	EXT2_FLAG_JOURNAL_DEV_OK - Open an ext3 journal device
 *	EXT2_FLAG_SKIP_MMP - Open without multi-mount protection check.
 *	EXT2_FLAG_64BITS - Allow 64-bit bitfields (needed for large
 *				filesystems)
 */
errcode_t ext2fs_open2(const char *name, const char *io_options,
		       int flags, int superblock,
		       unsigned int block_size, io_manager manager,
		       ext2_filsys *ret_fs)
{
	ext2_filsys	fs;
	errcode_t	retval;
	unsigned long	i, first_meta_bg;
	__u32		features;
	unsigned int	blocks_per_group, io_flags;
	blk64_t		group_block, blk;
	char		*dest, *cp;
	int		group_zero_adjust = 0;
#ifdef WORDS_BIGENDIAN
	unsigned int	groups_per_block;
	struct ext2_group_desc *gdp;
	int		j;
#endif
	char		*time_env;

	EXT2_CHECK_MAGIC(manager, EXT2_ET_MAGIC_IO_MANAGER);

	retval = ext2fs_get_mem(sizeof(struct struct_ext2_filsys), &fs);
	if (retval)
		return retval;

	memset(fs, 0, sizeof(struct struct_ext2_filsys));
	fs->magic = EXT2_ET_MAGIC_EXT2FS_FILSYS;
	fs->flags = flags;
	/* don't overwrite sb backups unless flag is explicitly cleared */
	fs->flags |= EXT2_FLAG_MASTER_SB_ONLY;
	fs->umask = 022;

	time_env = getenv("E2FSPROGS_FAKE_TIME");
	if (time_env)
		fs->now = strtoul(time_env, NULL, 0);

	retval = ext2fs_get_mem(strlen(name)+1, &fs->device_name);
	if (retval)
		goto cleanup;
	strcpy(fs->device_name, name);
	cp = strchr(fs->device_name, '?');
	if (!io_options && cp) {
		*cp++ = 0;
		io_options = cp;
	}

	io_flags = 0;
	if (flags & EXT2_FLAG_RW)
		io_flags |= IO_FLAG_RW;
	if (flags & EXT2_FLAG_EXCLUSIVE)
		io_flags |= IO_FLAG_EXCLUSIVE;
	if (flags & EXT2_FLAG_DIRECT_IO)
		io_flags |= IO_FLAG_DIRECT_IO;
	retval = manager->open(fs->device_name, io_flags, &fs->io);
	if (retval)
		goto cleanup;
	if (io_options &&
	    (retval = io_channel_set_options(fs->io, io_options)))
		goto cleanup;
	fs->image_io = fs->io;
	fs->io->app_data = fs;
	retval = io_channel_alloc_buf(fs->io, -SUPERBLOCK_SIZE, &fs->super);
	if (retval)
		goto cleanup;
	if (flags & EXT2_FLAG_IMAGE_FILE) {
		retval = ext2fs_get_mem(sizeof(struct ext2_image_hdr),
					&fs->image_header);
		if (retval)
			goto cleanup;
		retval = io_channel_read_blk(fs->io, 0,
					     -(int)sizeof(struct ext2_image_hdr),
					     fs->image_header);
		if (retval)
			goto cleanup;
		if (fs->image_header->magic_number != EXT2_ET_MAGIC_E2IMAGE)
			return EXT2_ET_MAGIC_E2IMAGE;
		superblock = 1;
		block_size = fs->image_header->fs_blocksize;
	}

	/*
	 * If the user specifies a specific block # for the
	 * superblock, then he/she must also specify the block size!
	 * Otherwise, read the master superblock located at offset
	 * SUPERBLOCK_OFFSET from the start of the partition.
//.........这里部分代码省略.........

开发者ID:MIPS，项目名称:external-e2fsprogs，代码行数:101，代码来源:openfs.c

示例5: ext2fs_initialize

errcode_t ext2fs_initialize(const char *name, int flags,
                            struct ext2_super_block *param,
                            io_manager manager, ext2_filsys *ret_fs)
{
    ext2_filsys	fs;
    errcode_t	retval;
    struct ext2_super_block *super;
    int		frags_per_block;
    unsigned int	rem;
    unsigned int	overhead = 0;
    unsigned int	ipg;
    dgrp_t		i;
    blk_t		numblocks;
    int		rsv_gdt;
    int		io_flags;
    char		*buf;
    char		c;

    if (!param || !param->s_blocks_count)
        return EXT2_ET_INVALID_ARGUMENT;

    retval = ext2fs_get_mem(sizeof(struct struct_ext2_filsys), &fs);
    if (retval)
        return retval;

    memset(fs, 0, sizeof(struct struct_ext2_filsys));
    fs->magic = EXT2_ET_MAGIC_EXT2FS_FILSYS;
    fs->flags = flags | EXT2_FLAG_RW;
    fs->umask = 022;
#ifdef WORDS_BIGENDIAN
    fs->flags |= EXT2_FLAG_SWAP_BYTES;
#endif
    io_flags = IO_FLAG_RW;
    if (flags & EXT2_FLAG_EXCLUSIVE)
        io_flags |= IO_FLAG_EXCLUSIVE;
    retval = manager->open(name, io_flags, &fs->io);
    if (retval)
        goto cleanup;
    fs->image_io = fs->io;
    fs->io->app_data = fs;
    retval = ext2fs_get_mem(strlen(name)+1, &fs->device_name);
    if (retval)
        goto cleanup;

    strcpy(fs->device_name, name);
    retval = ext2fs_get_mem(SUPERBLOCK_SIZE, &super);
    if (retval)
        goto cleanup;
    fs->super = super;

    memset(super, 0, SUPERBLOCK_SIZE);

#define set_field(field, default) (super->field = param->field ? \
				   param->field : (default))

    super->s_magic = EXT2_SUPER_MAGIC;
    super->s_state = EXT2_VALID_FS;

    set_field(s_log_block_size, 0);	/* default blocksize: 1024 bytes */
    set_field(s_log_frag_size, 0); /* default fragsize: 1024 bytes */
    set_field(s_first_data_block, super->s_log_block_size ? 0 : 1);
    set_field(s_max_mnt_count, EXT2_DFL_MAX_MNT_COUNT);
    set_field(s_errors, EXT2_ERRORS_DEFAULT);
    set_field(s_feature_compat, 0);
    set_field(s_feature_incompat, 0);
    set_field(s_feature_ro_compat, 0);
    set_field(s_first_meta_bg, 0);
    if (super->s_feature_incompat & ~EXT2_LIB_FEATURE_INCOMPAT_SUPP) {
        retval = EXT2_ET_UNSUPP_FEATURE;
        goto cleanup;
    }
    if (super->s_feature_ro_compat & ~EXT2_LIB_FEATURE_RO_COMPAT_SUPP) {
        retval = EXT2_ET_RO_UNSUPP_FEATURE;
        goto cleanup;
    }

    set_field(s_rev_level, EXT2_GOOD_OLD_REV);
    if (super->s_rev_level >= EXT2_DYNAMIC_REV) {
        set_field(s_first_ino, EXT2_GOOD_OLD_FIRST_INO);
        set_field(s_inode_size, EXT2_GOOD_OLD_INODE_SIZE);
    }

    set_field(s_checkinterval, EXT2_DFL_CHECKINTERVAL);
    super->s_mkfs_time = super->s_lastcheck = fs->now ? fs->now : time(NULL);

    super->s_creator_os = CREATOR_OS;

    fs->blocksize = EXT2_BLOCK_SIZE(super);
    fs->fragsize = EXT2_FRAG_SIZE(super);
    frags_per_block = fs->blocksize / fs->fragsize;

    /* default: (fs->blocksize*8) blocks/group, up to 2^16 (GDT limit) */
    set_field(s_blocks_per_group, fs->blocksize * 8);
    if (super->s_blocks_per_group > EXT2_MAX_BLOCKS_PER_GROUP(super))
        super->s_blocks_per_group = EXT2_MAX_BLOCKS_PER_GROUP(super);
    super->s_frags_per_group = super->s_blocks_per_group * frags_per_block;

    super->s_blocks_count = param->s_blocks_count;
    super->s_r_blocks_count = param->s_r_blocks_count;
    if (super->s_r_blocks_count >= param->s_blocks_count) {
//.........这里部分代码省略.........

开发者ID:mmeeks，项目名称:ext2tools，代码行数:101，代码来源:initialize.c

示例6: ext2fs_open2

/*
 *  Note: if superblock is non-zero, block-size must also be non-zero.
 * 	Superblock and block_size can be zero to use the default size.
 *
 * Valid flags for ext2fs_open()
 * 
 * 	EXT2_FLAG_RW	- Open the filesystem for read/write.
 * 	EXT2_FLAG_FORCE - Open the filesystem even if some of the
 *				features aren't supported.
 *	EXT2_FLAG_JOURNAL_DEV_OK - Open an ext3 journal device
 */
errcode_t ext2fs_open2(const char *name, const char *io_options,
		       int flags, int superblock,
		       unsigned int block_size, io_manager manager, 
		       ext2_filsys *ret_fs)
{
	ext2_filsys	fs;
	errcode_t	retval;
	unsigned long	i;
	int		groups_per_block, blocks_per_group;
	blk_t		group_block, blk;
	char		*dest, *cp;
#ifdef EXT2FS_ENABLE_SWAPFS
	int j;
	struct ext2_group_desc *gdp;
#endif
	
	EXT2_CHECK_MAGIC(manager, EXT2_ET_MAGIC_IO_MANAGER);

	retval = ext2fs_get_mem(sizeof(struct struct_ext2_filsys), &fs);
	if (retval)
		return retval;
	
	memset(fs, 0, sizeof(struct struct_ext2_filsys));
	fs->magic = EXT2_ET_MAGIC_EXT2FS_FILSYS;
	fs->flags = flags;
	fs->umask = 022;
	retval = ext2fs_get_mem(strlen(name)+1, &fs->device_name);
	if (retval)
		goto cleanup;
	strcpy(fs->device_name, name);
	cp = strchr(fs->device_name, '?');
	if (!io_options && cp) {
		*cp++ = 0;
		io_options = cp;
	}
		
	retval = manager->open(fs->device_name, 
			       (flags & EXT2_FLAG_RW) ? IO_FLAG_RW : 0,
			       &fs->io);
	if (retval)
		goto cleanup;
	if (io_options && 
	    (retval = io_channel_set_options(fs->io, io_options)))
		goto cleanup;
	fs->image_io = fs->io;
	fs->io->app_data = fs;
	retval = ext2fs_get_mem(SUPERBLOCK_SIZE, &fs->super);
	if (retval)
		goto cleanup;
	if (flags & EXT2_FLAG_IMAGE_FILE) {
		retval = ext2fs_get_mem(sizeof(struct ext2_image_hdr),
					&fs->image_header);
		if (retval)
			goto cleanup;
		retval = io_channel_read_blk(fs->io, 0,
					     -(int)sizeof(struct ext2_image_hdr),
					     fs->image_header);
		if (retval)
			goto cleanup;
		if (fs->image_header->magic_number != EXT2_ET_MAGIC_E2IMAGE)
			return EXT2_ET_MAGIC_E2IMAGE;
		superblock = 1;
		block_size = fs->image_header->fs_blocksize;
	}

	/*
	 * If the user specifies a specific block # for the
	 * superblock, then he/she must also specify the block size!
	 * Otherwise, read the master superblock located at offset
	 * SUPERBLOCK_OFFSET from the start of the partition.
	 *
	 * Note: we only save a backup copy of the superblock if we
	 * are reading the superblock from the primary superblock location.
	 */
	if (superblock) {
		if (!block_size) {
			retval = EXT2_ET_INVALID_ARGUMENT;
			goto cleanup;
		}
		io_channel_set_blksize(fs->io, block_size);
		group_block = superblock;
		fs->orig_super = 0;
	} else {
		io_channel_set_blksize(fs->io, SUPERBLOCK_OFFSET);
		superblock = 1;
		group_block = 0;
		retval = ext2fs_get_mem(SUPERBLOCK_SIZE, &fs->orig_super);
		if (retval)
			goto cleanup;
//.........这里部分代码省略.........

开发者ID:K0T0LI，项目名称:busybox，代码行数:101，代码来源:openfs.c

示例7: ext2fs_initialize

errcode_t ext2fs_initialize(const char *name, int flags,
			    struct ext2_super_block *param,
			    io_manager manager, ext2_filsys *ret_fs)
{
	ext2_filsys	fs;
	errcode_t	retval;
	struct ext2_super_block *super;
	unsigned int	rem;
	unsigned int	overhead = 0;
	unsigned int	ipg;
	dgrp_t		i;
	blk64_t		free_blocks;
	blk_t		numblocks;
	int		rsv_gdt;
	int		csum_flag;
	int		bigalloc_flag;
	int		io_flags;
	unsigned	reserved_inos;
	char		*buf = 0;
	char		c;
	double		reserved_ratio;

	if (!param || !ext2fs_blocks_count(param))
		return EXT2_ET_INVALID_ARGUMENT;

	retval = ext2fs_get_mem(sizeof(struct struct_ext2_filsys), &fs);
	if (retval)
		return retval;

	memset(fs, 0, sizeof(struct struct_ext2_filsys));
	fs->magic = EXT2_ET_MAGIC_EXT2FS_FILSYS;
	fs->flags = flags | EXT2_FLAG_RW;
	fs->umask = 022;
	fs->default_bitmap_type = EXT2FS_BMAP64_RBTREE;
#ifdef WORDS_BIGENDIAN
	fs->flags |= EXT2_FLAG_SWAP_BYTES;
#endif
	io_flags = IO_FLAG_RW;
	if (flags & EXT2_FLAG_EXCLUSIVE)
		io_flags |= IO_FLAG_EXCLUSIVE;
	if (flags & EXT2_FLAG_DIRECT_IO)
		io_flags |= IO_FLAG_DIRECT_IO;
	retval = manager->open(name, io_flags, &fs->io);
	if (retval)
		goto cleanup;
	fs->image_io = fs->io;
	fs->io->app_data = fs;
	retval = ext2fs_get_mem(strlen(name)+1, &fs->device_name);
	if (retval)
		goto cleanup;

	strcpy(fs->device_name, name);
	retval = ext2fs_get_mem(SUPERBLOCK_SIZE, &super);
	if (retval)
		goto cleanup;
	fs->super = super;

	memset(super, 0, SUPERBLOCK_SIZE);

#define set_field(field, default) (super->field = param->field ? \
				   param->field : (default))
#define assign_field(field)	(super->field = param->field)

	super->s_magic = EXT2_SUPER_MAGIC;
	super->s_state = EXT2_VALID_FS;

	bigalloc_flag = EXT2_HAS_RO_COMPAT_FEATURE(param,
				   EXT4_FEATURE_RO_COMPAT_BIGALLOC);

	assign_field(s_log_block_size);

	if (bigalloc_flag) {
		set_field(s_log_cluster_size, super->s_log_block_size+4);
		if (super->s_log_block_size > super->s_log_cluster_size) {
			retval = EXT2_ET_INVALID_ARGUMENT;
			goto cleanup;
		}
	} else
		super->s_log_cluster_size = super->s_log_block_size;

	set_field(s_first_data_block, super->s_log_cluster_size ? 0 : 1);
	set_field(s_max_mnt_count, 0);
	set_field(s_errors, EXT2_ERRORS_DEFAULT);
	set_field(s_feature_compat, 0);
	set_field(s_feature_incompat, 0);
	set_field(s_feature_ro_compat, 0);
	set_field(s_default_mount_opts, 0);
	set_field(s_first_meta_bg, 0);
	set_field(s_raid_stride, 0);		/* default stride size: 0 */
	set_field(s_raid_stripe_width, 0);	/* default stripe width: 0 */
	set_field(s_log_groups_per_flex, 0);
	set_field(s_flags, 0);
	assign_field(s_backup_bgs[0]);
	assign_field(s_backup_bgs[1]);
	if (super->s_feature_incompat & ~EXT2_LIB_FEATURE_INCOMPAT_SUPP) {
		retval = EXT2_ET_UNSUPP_FEATURE;
		goto cleanup;
	}
	if (super->s_feature_ro_compat & ~EXT2_LIB_FEATURE_RO_COMPAT_SUPP) {
		retval = EXT2_ET_RO_UNSUPP_FEATURE;
//.........这里部分代码省略.........

开发者ID:DebdutBiswas，项目名称:WinFLASHTool，代码行数:101，代码来源:initialize.c

注：本文中的io_manager类示例由纯净天空整理自Github/MSDocs等源码及文档管理平台，相关代码片段筛选自各路编程大神贡献的开源项目，源码版权归原作者所有，传播和使用请参考对应项目的License；未经允许，请勿转载。

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C++ io_manager类代码示例

示例1: test_open

示例2: test_open

示例3: get_backup_sb

示例4: ext2fs_open2

示例5: ext2fs_initialize

示例6: ext2fs_open2

示例7: ext2fs_initialize

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