fs/exfat/exfat_raw.h

Source file repositories/reference/linux-study-clean/fs/exfat/exfat_raw.h

File Facts

System
Linux kernel
Corpus path
fs/exfat/exfat_raw.h
Extension
.h
Size
5345 bytes
Lines
198
Domain
Core OS
Bucket
VFS And Filesystem Core
Inferred role
Core OS: implementation source
Status
source implementation candidate

Why This File Exists

Core operating-system implementation surface: boot, tasks, memory, VFS, syscall-facing interfaces, synchronization, credentials, and isolation.

Dependency Surface

Detected Declarations

Annotated Snippet

struct boot_sector {
	__u8	jmp_boot[BOOTSEC_JUMP_BOOT_LEN];
	__u8	fs_name[BOOTSEC_FS_NAME_LEN];
	__u8	must_be_zero[BOOTSEC_OLDBPB_LEN];
	__le64	partition_offset;
	__le64	vol_length;
	__le32	fat_offset;
	__le32	fat_length;
	__le32	clu_offset;
	__le32	clu_count;
	__le32	root_cluster;
	__le32	vol_serial;
	__u8	fs_revision[2];
	__le16	vol_flags;
	__u8	sect_size_bits;
	__u8	sect_per_clus_bits;
	__u8	num_fats;
	__u8	drv_sel;
	__u8	percent_in_use;
	__u8	reserved[7];
	__u8	boot_code[390];
	__le16	signature;
} __packed;

struct exfat_dentry {
	__u8 type;
	union {
		struct {
			__u8 num_ext;
			__le16 checksum;
			__le16 attr;
			__le16 reserved1;
			__le16 create_time;
			__le16 create_date;
			__le16 modify_time;
			__le16 modify_date;
			__le16 access_time;
			__le16 access_date;
			__u8 create_time_cs;
			__u8 modify_time_cs;
			__u8 create_tz;
			__u8 modify_tz;
			__u8 access_tz;
			__u8 reserved2[7];
		} __packed file; /* file directory entry */
		struct {
			__u8 flags;
			__u8 reserved1;
			__u8 name_len;
			__le16 name_hash;
			__le16 reserved2;
			__le64 valid_size;
			__le32 reserved3;
			__le32 start_clu;
			__le64 size;
		} __packed stream; /* stream extension directory entry */
		struct {
			__u8 flags;
			__le16 unicode_0_14[EXFAT_FILE_NAME_LEN];
		} __packed name; /* file name directory entry */
		struct {
			__u8 flags;
			__u8 reserved[18];
			__le32 start_clu;
			__le64 size;
		} __packed bitmap; /* allocation bitmap directory entry */
		struct {
			__u8 reserved1[3];
			__le32 checksum;
			__u8 reserved2[12];
			__le32 start_clu;
			__le64 size;
		} __packed upcase; /* up-case table directory entry */
		struct {
			__u8 char_count;
			__le16 volume_label[EXFAT_VOLUME_LABEL_LEN];
			__u8 reserved[8];
		} __packed volume_label; /* volume label directory entry */
		struct {
			__u8 flags;
			__u8 vendor_guid[16];
			__u8 vendor_defined[14];
		} __packed vendor_ext; /* vendor extension directory entry */
		struct {
			__u8 flags;
			__u8 vendor_guid[16];
			__u8 vendor_defined[2];
			__le32 start_clu;
			__le64 size;
		} __packed vendor_alloc; /* vendor allocation directory entry */

Annotation

Implementation Notes